drivers/net/ethernet/intel/i40e/i40e_main.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 - 2014 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 /* Local includes */
  28 #include "i40e.h"
  29 #ifdef CONFIG_I40E_VXLAN
  30 #include <net/vxlan.h>
  31 #endif
  32
  33 const char i40e_driver_name[] = "i40e";
  34 static const char i40e_driver_string[] =
  35                         "Intel(R) Ethernet Connection XL710 Network Driver";
  36
  37 #define DRV_KERN "-k"
  38
  39 #define DRV_VERSION_MAJOR 0
  40 #define DRV_VERSION_MINOR 3
  41 #define DRV_VERSION_BUILD 27
  42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  43              __stringify(DRV_VERSION_MINOR) "." \
  44              __stringify(DRV_VERSION_BUILD)    DRV_KERN
  45 const char i40e_driver_version_str[] = DRV_VERSION;
  46 static const char i40e_copyright[] = "Copyright (c) 2013 Intel Corporation.";
  47
  48 /* a bit of forward declarations */
  49 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
  50 static void i40e_handle_reset_warning(struct i40e_pf *pf);
  51 static int i40e_add_vsi(struct i40e_vsi *vsi);
  52 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
  53 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit);
  54 static int i40e_setup_misc_vector(struct i40e_pf *pf);
  55 static void i40e_determine_queue_usage(struct i40e_pf *pf);
  56 static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
  57
  58 /* i40e_pci_tbl - PCI Device ID Table
  59  *
  60  * Last entry must be all 0s
  61  *
  62  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  63  *   Class, Class Mask, private data (not used) }
  64  */
  65 static DEFINE_PCI_DEVICE_TABLE(i40e_pci_tbl) = {
  66         {PCI_VDEVICE(INTEL, I40E_SFP_XL710_DEVICE_ID), 0},
  67         {PCI_VDEVICE(INTEL, I40E_SFP_X710_DEVICE_ID), 0},
  68         {PCI_VDEVICE(INTEL, I40E_QEMU_DEVICE_ID), 0},
  69         {PCI_VDEVICE(INTEL, I40E_KX_A_DEVICE_ID), 0},
  70         {PCI_VDEVICE(INTEL, I40E_KX_B_DEVICE_ID), 0},
  71         {PCI_VDEVICE(INTEL, I40E_KX_C_DEVICE_ID), 0},
  72         {PCI_VDEVICE(INTEL, I40E_KX_D_DEVICE_ID), 0},
  73         {PCI_VDEVICE(INTEL, I40E_QSFP_A_DEVICE_ID), 0},
  74         {PCI_VDEVICE(INTEL, I40E_QSFP_B_DEVICE_ID), 0},
  75         {PCI_VDEVICE(INTEL, I40E_QSFP_C_DEVICE_ID), 0},
  76         /* required last entry */
  77         {0, }
  78 };
  79 MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);
  80
  81 #define I40E_MAX_VF_COUNT 128
  82 static int debug = -1;
  83 module_param(debug, int, 0);
  84 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  85
  86 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
  87 MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
  88 MODULE_LICENSE("GPL");
  89 MODULE_VERSION(DRV_VERSION);
  90
  91 /**
  92  * i40e_allocate_dma_mem_d - OS specific memory alloc for shared code
  93  * @hw:   pointer to the HW structure
  94  * @mem:  ptr to mem struct to fill out
  95  * @size: size of memory requested
  96  * @alignment: what to align the allocation to
  97  **/
  98 int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
  99                             u64 size, u32 alignment)
 100 {
 101         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 102
 103         mem->size = ALIGN(size, alignment);
 104         mem->va = dma_zalloc_coherent(&pf->pdev->dev, mem->size,
 105                                       &mem->pa, GFP_KERNEL);
 106         if (!mem->va)
 107                 return -ENOMEM;
 108
 109         return 0;
 110 }
 111
 112 /**
 113  * i40e_free_dma_mem_d - OS specific memory free for shared code
 114  * @hw:   pointer to the HW structure
 115  * @mem:  ptr to mem struct to free
 116  **/
 117 int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 118 {
 119         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 120
 121         dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
 122         mem->va = NULL;
 123         mem->pa = 0;
 124         mem->size = 0;
 125
 126         return 0;
 127 }
 128
 129 /**
 130  * i40e_allocate_virt_mem_d - OS specific memory alloc for shared code
 131  * @hw:   pointer to the HW structure
 132  * @mem:  ptr to mem struct to fill out
 133  * @size: size of memory requested
 134  **/
 135 int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
 136                              u32 size)
 137 {
 138         mem->size = size;
 139         mem->va = kzalloc(size, GFP_KERNEL);
 140
 141         if (!mem->va)
 142                 return -ENOMEM;
 143
 144         return 0;
 145 }
 146
 147 /**
 148  * i40e_free_virt_mem_d - OS specific memory free for shared code
 149  * @hw:   pointer to the HW structure
 150  * @mem:  ptr to mem struct to free
 151  **/
 152 int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
 153 {
 154         /* it's ok to kfree a NULL pointer */
 155         kfree(mem->va);
 156         mem->va = NULL;
 157         mem->size = 0;
 158
 159         return 0;
 160 }
 161
 162 /**
 163  * i40e_get_lump - find a lump of free generic resource
 164  * @pf: board private structure
 165  * @pile: the pile of resource to search
 166  * @needed: the number of items needed
 167  * @id: an owner id to stick on the items assigned
 168  *
 169  * Returns the base item index of the lump, or negative for error
 170  *
 171  * The search_hint trick and lack of advanced fit-finding only work
 172  * because we're highly likely to have all the same size lump requests.
 173  * Linear search time and any fragmentation should be minimal.
 174  **/
 175 static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
 176                          u16 needed, u16 id)
 177 {
 178         int ret = -ENOMEM;
 179         int i, j;
 180
 181         if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
 182                 dev_info(&pf->pdev->dev,
 183                          "param err: pile=%p needed=%d id=0x%04x\n",
 184                          pile, needed, id);
 185                 return -EINVAL;
 186         }
 187
 188         /* start the linear search with an imperfect hint */
 189         i = pile->search_hint;
 190         while (i < pile->num_entries) {
 191                 /* skip already allocated entries */
 192                 if (pile->list[i] & I40E_PILE_VALID_BIT) {
 193                         i++;
 194                         continue;
 195                 }
 196
 197                 /* do we have enough in this lump? */
 198                 for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
 199                         if (pile->list[i+j] & I40E_PILE_VALID_BIT)
 200                                 break;
 201                 }
 202
 203                 if (j == needed) {
 204                         /* there was enough, so assign it to the requestor */
 205                         for (j = 0; j < needed; j++)
 206                                 pile->list[i+j] = id | I40E_PILE_VALID_BIT;
 207                         ret = i;
 208                         pile->search_hint = i + j;
 209                         break;
 210                 } else {
 211                         /* not enough, so skip over it and continue looking */
 212                         i += j;
 213                 }
 214         }
 215
 216         return ret;
 217 }
 218
 219 /**
 220  * i40e_put_lump - return a lump of generic resource
 221  * @pile: the pile of resource to search
 222  * @index: the base item index
 223  * @id: the owner id of the items assigned
 224  *
 225  * Returns the count of items in the lump
 226  **/
 227 static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
 228 {
 229         int valid_id = (id | I40E_PILE_VALID_BIT);
 230         int count = 0;
 231         int i;
 232
 233         if (!pile || index >= pile->num_entries)
 234                 return -EINVAL;
 235
 236         for (i = index;
 237              i < pile->num_entries && pile->list[i] == valid_id;
 238              i++) {
 239                 pile->list[i] = 0;
 240                 count++;
 241         }
 242
 243         if (count && index < pile->search_hint)
 244                 pile->search_hint = index;
 245
 246         return count;
 247 }
 248
 249 /**
 250  * i40e_service_event_schedule - Schedule the service task to wake up
 251  * @pf: board private structure
 252  *
 253  * If not already scheduled, this puts the task into the work queue
 254  **/
 255 static void i40e_service_event_schedule(struct i40e_pf *pf)
 256 {
 257         if (!test_bit(__I40E_DOWN, &pf->state) &&
 258             !test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state) &&
 259             !test_and_set_bit(__I40E_SERVICE_SCHED, &pf->state))
 260                 schedule_work(&pf->service_task);
 261 }
 262
 263 /**
 264  * i40e_tx_timeout - Respond to a Tx Hang
 265  * @netdev: network interface device structure
 266  *
 267  * If any port has noticed a Tx timeout, it is likely that the whole
 268  * device is munged, not just the one netdev port, so go for the full
 269  * reset.
 270  **/
 271 static void i40e_tx_timeout(struct net_device *netdev)
 272 {
 273         struct i40e_netdev_priv *np = netdev_priv(netdev);
 274         struct i40e_vsi *vsi = np->vsi;
 275         struct i40e_pf *pf = vsi->back;
 276
 277         pf->tx_timeout_count++;
 278
 279         if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
 280                 pf->tx_timeout_recovery_level = 0;
 281         pf->tx_timeout_last_recovery = jiffies;
 282         netdev_info(netdev, "tx_timeout recovery level %d\n",
 283                     pf->tx_timeout_recovery_level);
 284
 285         switch (pf->tx_timeout_recovery_level) {
 286         case 0:
 287                 /* disable and re-enable queues for the VSI */
 288                 if (in_interrupt()) {
 289                         set_bit(__I40E_REINIT_REQUESTED, &pf->state);
 290                         set_bit(__I40E_REINIT_REQUESTED, &vsi->state);
 291                 } else {
 292                         i40e_vsi_reinit_locked(vsi);
 293                 }
 294                 break;
 295         case 1:
 296                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 297                 break;
 298         case 2:
 299                 set_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
 300                 break;
 301         case 3:
 302                 set_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
 303                 break;
 304         default:
 305                 netdev_err(netdev, "tx_timeout recovery unsuccessful\n");
 306                 i40e_down(vsi);
 307                 break;
 308         }
 309         i40e_service_event_schedule(pf);
 310         pf->tx_timeout_recovery_level++;
 311 }
 312
 313 /**
 314  * i40e_release_rx_desc - Store the new tail and head values
 315  * @rx_ring: ring to bump
 316  * @val: new head index
 317  **/
 318 static inline void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val)
 319 {
 320         rx_ring->next_to_use = val;
 321
 322         /* Force memory writes to complete before letting h/w
 323          * know there are new descriptors to fetch.  (Only
 324          * applicable for weak-ordered memory model archs,
 325          * such as IA-64).
 326          */
 327         wmb();
 328         writel(val, rx_ring->tail);
 329 }
 330
 331 /**
 332  * i40e_get_vsi_stats_struct - Get System Network Statistics
 333  * @vsi: the VSI we care about
 334  *
 335  * Returns the address of the device statistics structure.
 336  * The statistics are actually updated from the service task.
 337  **/
 338 struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
 339 {
 340         return &vsi->net_stats;
 341 }
 342
 343 /**
 344  * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 345  * @netdev: network interface device structure
 346  *
 347  * Returns the address of the device statistics structure.
 348  * The statistics are actually updated from the service task.
 349  **/
 350 static struct rtnl_link_stats64 *i40e_get_netdev_stats_struct(
 351                                              struct net_device *netdev,
 352                                              struct rtnl_link_stats64 *stats)
 353 {
 354         struct i40e_netdev_priv *np = netdev_priv(netdev);
 355         struct i40e_vsi *vsi = np->vsi;
 356         struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
 357         int i;
 358
 359
 360         if (test_bit(__I40E_DOWN, &vsi->state))
 361                 return stats;
 362
 363         if (!vsi->tx_rings)
 364                 return stats;
 365
 366         rcu_read_lock();
 367         for (i = 0; i < vsi->num_queue_pairs; i++) {
 368                 struct i40e_ring *tx_ring, *rx_ring;
 369                 u64 bytes, packets;
 370                 unsigned int start;
 371
 372                 tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
 373                 if (!tx_ring)
 374                         continue;
 375
 376                 do {
 377                         start = u64_stats_fetch_begin_bh(&tx_ring->syncp);
 378                         packets = tx_ring->stats.packets;
 379                         bytes   = tx_ring->stats.bytes;
 380                 } while (u64_stats_fetch_retry_bh(&tx_ring->syncp, start));
 381
 382                 stats->tx_packets += packets;
 383                 stats->tx_bytes   += bytes;
 384                 rx_ring = &tx_ring[1];
 385
 386                 do {
 387                         start = u64_stats_fetch_begin_bh(&rx_ring->syncp);
 388                         packets = rx_ring->stats.packets;
 389                         bytes   = rx_ring->stats.bytes;
 390                 } while (u64_stats_fetch_retry_bh(&rx_ring->syncp, start));
 391
 392                 stats->rx_packets += packets;
 393                 stats->rx_bytes   += bytes;
 394         }
 395         rcu_read_unlock();
 396
 397         /* following stats updated by ixgbe_watchdog_task() */
 398         stats->multicast        = vsi_stats->multicast;
 399         stats->tx_errors        = vsi_stats->tx_errors;
 400         stats->tx_dropped       = vsi_stats->tx_dropped;
 401         stats->rx_errors        = vsi_stats->rx_errors;
 402         stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
 403         stats->rx_length_errors = vsi_stats->rx_length_errors;
 404
 405         return stats;
 406 }
 407
 408 /**
 409  * i40e_vsi_reset_stats - Resets all stats of the given vsi
 410  * @vsi: the VSI to have its stats reset
 411  **/
 412 void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
 413 {
 414         struct rtnl_link_stats64 *ns;
 415         int i;
 416
 417         if (!vsi)
 418                 return;
 419
 420         ns = i40e_get_vsi_stats_struct(vsi);
 421         memset(ns, 0, sizeof(*ns));
 422         memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
 423         memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
 424         memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
 425         if (vsi->rx_rings && vsi->rx_rings[0]) {
 426                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 427                         memset(&vsi->rx_rings[i]->stats, 0 ,
 428                                sizeof(vsi->rx_rings[i]->stats));
 429                         memset(&vsi->rx_rings[i]->rx_stats, 0 ,
 430                                sizeof(vsi->rx_rings[i]->rx_stats));
 431                         memset(&vsi->tx_rings[i]->stats, 0 ,
 432                                sizeof(vsi->tx_rings[i]->stats));
 433                         memset(&vsi->tx_rings[i]->tx_stats, 0,
 434                                sizeof(vsi->tx_rings[i]->tx_stats));
 435                 }
 436         }
 437         vsi->stat_offsets_loaded = false;
 438 }
 439
 440 /**
 441  * i40e_pf_reset_stats - Reset all of the stats for the given pf
 442  * @pf: the PF to be reset
 443  **/
 444 void i40e_pf_reset_stats(struct i40e_pf *pf)
 445 {
 446         memset(&pf->stats, 0, sizeof(pf->stats));
 447         memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
 448         pf->stat_offsets_loaded = false;
 449 }
 450
 451 /**
 452  * i40e_stat_update48 - read and update a 48 bit stat from the chip
 453  * @hw: ptr to the hardware info
 454  * @hireg: the high 32 bit reg to read
 455  * @loreg: the low 32 bit reg to read
 456  * @offset_loaded: has the initial offset been loaded yet
 457  * @offset: ptr to current offset value
 458  * @stat: ptr to the stat
 459  *
 460  * Since the device stats are not reset at PFReset, they likely will not
 461  * be zeroed when the driver starts.  We'll save the first values read
 462  * and use them as offsets to be subtracted from the raw values in order
 463  * to report stats that count from zero.  In the process, we also manage
 464  * the potential roll-over.
 465  **/
 466 static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
 467                                bool offset_loaded, u64 *offset, u64 *stat)
 468 {
 469         u64 new_data;
 470
 471         if (hw->device_id == I40E_QEMU_DEVICE_ID) {
 472                 new_data = rd32(hw, loreg);
 473                 new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
 474         } else {
 475                 new_data = rd64(hw, loreg);
 476         }
 477         if (!offset_loaded)
 478                 *offset = new_data;
 479         if (likely(new_data >= *offset))
 480                 *stat = new_data - *offset;
 481         else
 482                 *stat = (new_data + ((u64)1 << 48)) - *offset;
 483         *stat &= 0xFFFFFFFFFFFFULL;
 484 }
 485
 486 /**
 487  * i40e_stat_update32 - read and update a 32 bit stat from the chip
 488  * @hw: ptr to the hardware info
 489  * @reg: the hw reg to read
 490  * @offset_loaded: has the initial offset been loaded yet
 491  * @offset: ptr to current offset value
 492  * @stat: ptr to the stat
 493  **/
 494 static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
 495                                bool offset_loaded, u64 *offset, u64 *stat)
 496 {
 497         u32 new_data;
 498
 499         new_data = rd32(hw, reg);
 500         if (!offset_loaded)
 501                 *offset = new_data;
 502         if (likely(new_data >= *offset))
 503                 *stat = (u32)(new_data - *offset);
 504         else
 505                 *stat = (u32)((new_data + ((u64)1 << 32)) - *offset);
 506 }
 507
 508 /**
 509  * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 510  * @vsi: the VSI to be updated
 511  **/
 512 void i40e_update_eth_stats(struct i40e_vsi *vsi)
 513 {
 514         int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
 515         struct i40e_pf *pf = vsi->back;
 516         struct i40e_hw *hw = &pf->hw;
 517         struct i40e_eth_stats *oes;
 518         struct i40e_eth_stats *es;     /* device's eth stats */
 519
 520         es = &vsi->eth_stats;
 521         oes = &vsi->eth_stats_offsets;
 522
 523         /* Gather up the stats that the hw collects */
 524         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 525                            vsi->stat_offsets_loaded,
 526                            &oes->tx_errors, &es->tx_errors);
 527         i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx),
 528                            vsi->stat_offsets_loaded,
 529                            &oes->rx_discards, &es->rx_discards);
 530
 531         i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
 532                            I40E_GLV_GORCL(stat_idx),
 533                            vsi->stat_offsets_loaded,
 534                            &oes->rx_bytes, &es->rx_bytes);
 535         i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
 536                            I40E_GLV_UPRCL(stat_idx),
 537                            vsi->stat_offsets_loaded,
 538                            &oes->rx_unicast, &es->rx_unicast);
 539         i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
 540                            I40E_GLV_MPRCL(stat_idx),
 541                            vsi->stat_offsets_loaded,
 542                            &oes->rx_multicast, &es->rx_multicast);
 543         i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
 544                            I40E_GLV_BPRCL(stat_idx),
 545                            vsi->stat_offsets_loaded,
 546                            &oes->rx_broadcast, &es->rx_broadcast);
 547
 548         i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
 549                            I40E_GLV_GOTCL(stat_idx),
 550                            vsi->stat_offsets_loaded,
 551                            &oes->tx_bytes, &es->tx_bytes);
 552         i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
 553                            I40E_GLV_UPTCL(stat_idx),
 554                            vsi->stat_offsets_loaded,
 555                            &oes->tx_unicast, &es->tx_unicast);
 556         i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
 557                            I40E_GLV_MPTCL(stat_idx),
 558                            vsi->stat_offsets_loaded,
 559                            &oes->tx_multicast, &es->tx_multicast);
 560         i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
 561                            I40E_GLV_BPTCL(stat_idx),
 562                            vsi->stat_offsets_loaded,
 563                            &oes->tx_broadcast, &es->tx_broadcast);
 564         vsi->stat_offsets_loaded = true;
 565 }
 566
 567 /**
 568  * i40e_update_veb_stats - Update Switch component statistics
 569  * @veb: the VEB being updated
 570  **/
 571 static void i40e_update_veb_stats(struct i40e_veb *veb)
 572 {
 573         struct i40e_pf *pf = veb->pf;
 574         struct i40e_hw *hw = &pf->hw;
 575         struct i40e_eth_stats *oes;
 576         struct i40e_eth_stats *es;     /* device's eth stats */
 577         int idx = 0;
 578
 579         idx = veb->stats_idx;
 580         es = &veb->stats;
 581         oes = &veb->stats_offsets;
 582
 583         /* Gather up the stats that the hw collects */
 584         i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
 585                            veb->stat_offsets_loaded,
 586                            &oes->tx_discards, &es->tx_discards);
 587         if (hw->revision_id > 0)
 588                 i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
 589                                    veb->stat_offsets_loaded,
 590                                    &oes->rx_unknown_protocol,
 591                                    &es->rx_unknown_protocol);
 592         i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
 593                            veb->stat_offsets_loaded,
 594                            &oes->rx_bytes, &es->rx_bytes);
 595         i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
 596                            veb->stat_offsets_loaded,
 597                            &oes->rx_unicast, &es->rx_unicast);
 598         i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
 599                            veb->stat_offsets_loaded,
 600                            &oes->rx_multicast, &es->rx_multicast);
 601         i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
 602                            veb->stat_offsets_loaded,
 603                            &oes->rx_broadcast, &es->rx_broadcast);
 604
 605         i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
 606                            veb->stat_offsets_loaded,
 607                            &oes->tx_bytes, &es->tx_bytes);
 608         i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
 609                            veb->stat_offsets_loaded,
 610                            &oes->tx_unicast, &es->tx_unicast);
 611         i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
 612                            veb->stat_offsets_loaded,
 613                            &oes->tx_multicast, &es->tx_multicast);
 614         i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
 615                            veb->stat_offsets_loaded,
 616                            &oes->tx_broadcast, &es->tx_broadcast);
 617         veb->stat_offsets_loaded = true;
 618 }
 619
 620 /**
 621  * i40e_update_link_xoff_rx - Update XOFF received in link flow control mode
 622  * @pf: the corresponding PF
 623  *
 624  * Update the Rx XOFF counter (PAUSE frames) in link flow control mode
 625  **/
 626 static void i40e_update_link_xoff_rx(struct i40e_pf *pf)
 627 {
 628         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 629         struct i40e_hw_port_stats *nsd = &pf->stats;
 630         struct i40e_hw *hw = &pf->hw;
 631         u64 xoff = 0;
 632         u16 i, v;
 633
 634         if ((hw->fc.current_mode != I40E_FC_FULL) &&
 635             (hw->fc.current_mode != I40E_FC_RX_PAUSE))
 636                 return;
 637
 638         xoff = nsd->link_xoff_rx;
 639         i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
 640                            pf->stat_offsets_loaded,
 641                            &osd->link_xoff_rx, &nsd->link_xoff_rx);
 642
 643         /* No new LFC xoff rx */
 644         if (!(nsd->link_xoff_rx - xoff))
 645                 return;
 646
 647         /* Clear the __I40E_HANG_CHECK_ARMED bit for all Tx rings */
 648         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 649                 struct i40e_vsi *vsi = pf->vsi[v];
 650
 651                 if (!vsi)
 652                         continue;
 653
 654                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 655                         struct i40e_ring *ring = vsi->tx_rings[i];
 656                         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
 657                 }
 658         }
 659 }
 660
 661 /**
 662  * i40e_update_prio_xoff_rx - Update XOFF received in PFC mode
 663  * @pf: the corresponding PF
 664  *
 665  * Update the Rx XOFF counter (PAUSE frames) in PFC mode
 666  **/
 667 static void i40e_update_prio_xoff_rx(struct i40e_pf *pf)
 668 {
 669         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 670         struct i40e_hw_port_stats *nsd = &pf->stats;
 671         bool xoff[I40E_MAX_TRAFFIC_CLASS] = {false};
 672         struct i40e_dcbx_config *dcb_cfg;
 673         struct i40e_hw *hw = &pf->hw;
 674         u16 i, v;
 675         u8 tc;
 676
 677         dcb_cfg = &hw->local_dcbx_config;
 678
 679         /* See if DCB enabled with PFC TC */
 680         if (!(pf->flags & I40E_FLAG_DCB_ENABLED) ||
 681             !(dcb_cfg->pfc.pfcenable)) {
 682                 i40e_update_link_xoff_rx(pf);
 683                 return;
 684         }
 685
 686         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
 687                 u64 prio_xoff = nsd->priority_xoff_rx[i];
 688                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
 689                                    pf->stat_offsets_loaded,
 690                                    &osd->priority_xoff_rx[i],
 691                                    &nsd->priority_xoff_rx[i]);
 692
 693                 /* No new PFC xoff rx */
 694                 if (!(nsd->priority_xoff_rx[i] - prio_xoff))
 695                         continue;
 696                 /* Get the TC for given priority */
 697                 tc = dcb_cfg->etscfg.prioritytable[i];
 698                 xoff[tc] = true;
 699         }
 700
 701         /* Clear the __I40E_HANG_CHECK_ARMED bit for Tx rings */
 702         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 703                 struct i40e_vsi *vsi = pf->vsi[v];
 704
 705                 if (!vsi)
 706                         continue;
 707
 708                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 709                         struct i40e_ring *ring = vsi->tx_rings[i];
 710
 711                         tc = ring->dcb_tc;
 712                         if (xoff[tc])
 713                                 clear_bit(__I40E_HANG_CHECK_ARMED,
 714                                           &ring->state);
 715                 }
 716         }
 717 }
 718
 719 /**
 720  * i40e_update_stats - Update the board statistics counters.
 721  * @vsi: the VSI to be updated
 722  *
 723  * There are a few instances where we store the same stat in a
 724  * couple of different structs.  This is partly because we have
 725  * the netdev stats that need to be filled out, which is slightly
 726  * different from the "eth_stats" defined by the chip and used in
 727  * VF communications.  We sort it all out here in a central place.
 728  **/
 729 void i40e_update_stats(struct i40e_vsi *vsi)
 730 {
 731         struct i40e_pf *pf = vsi->back;
 732         struct i40e_hw *hw = &pf->hw;
 733         struct rtnl_link_stats64 *ons;
 734         struct rtnl_link_stats64 *ns;   /* netdev stats */
 735         struct i40e_eth_stats *oes;
 736         struct i40e_eth_stats *es;     /* device's eth stats */
 737         u32 tx_restart, tx_busy;
 738         u32 rx_page, rx_buf;
 739         u64 rx_p, rx_b;
 740         u64 tx_p, tx_b;
 741         int i;
 742         u16 q;
 743
 744         if (test_bit(__I40E_DOWN, &vsi->state) ||
 745             test_bit(__I40E_CONFIG_BUSY, &pf->state))
 746                 return;
 747
 748         ns = i40e_get_vsi_stats_struct(vsi);
 749         ons = &vsi->net_stats_offsets;
 750         es = &vsi->eth_stats;
 751         oes = &vsi->eth_stats_offsets;
 752
 753         /* Gather up the netdev and vsi stats that the driver collects
 754          * on the fly during packet processing
 755          */
 756         rx_b = rx_p = 0;
 757         tx_b = tx_p = 0;
 758         tx_restart = tx_busy = 0;
 759         rx_page = 0;
 760         rx_buf = 0;
 761         rcu_read_lock();
 762         for (q = 0; q < vsi->num_queue_pairs; q++) {
 763                 struct i40e_ring *p;
 764                 u64 bytes, packets;
 765                 unsigned int start;
 766
 767                 /* locate Tx ring */
 768                 p = ACCESS_ONCE(vsi->tx_rings[q]);
 769
 770                 do {
 771                         start = u64_stats_fetch_begin_bh(&p->syncp);
 772                         packets = p->stats.packets;
 773                         bytes = p->stats.bytes;
 774                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 775                 tx_b += bytes;
 776                 tx_p += packets;
 777                 tx_restart += p->tx_stats.restart_queue;
 778                 tx_busy += p->tx_stats.tx_busy;
 779
 780                 /* Rx queue is part of the same block as Tx queue */
 781                 p = &p[1];
 782                 do {
 783                         start = u64_stats_fetch_begin_bh(&p->syncp);
 784                         packets = p->stats.packets;
 785                         bytes = p->stats.bytes;
 786                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 787                 rx_b += bytes;
 788                 rx_p += packets;
 789                 rx_buf += p->rx_stats.alloc_buff_failed;
 790                 rx_page += p->rx_stats.alloc_page_failed;
 791         }
 792         rcu_read_unlock();
 793         vsi->tx_restart = tx_restart;
 794         vsi->tx_busy = tx_busy;
 795         vsi->rx_page_failed = rx_page;
 796         vsi->rx_buf_failed = rx_buf;
 797
 798         ns->rx_packets = rx_p;
 799         ns->rx_bytes = rx_b;
 800         ns->tx_packets = tx_p;
 801         ns->tx_bytes = tx_b;
 802
 803         i40e_update_eth_stats(vsi);
 804         /* update netdev stats from eth stats */
 805         ons->rx_errors = oes->rx_errors;
 806         ns->rx_errors = es->rx_errors;
 807         ons->tx_errors = oes->tx_errors;
 808         ns->tx_errors = es->tx_errors;
 809         ons->multicast = oes->rx_multicast;
 810         ns->multicast = es->rx_multicast;
 811         ons->tx_dropped = oes->tx_discards;
 812         ns->tx_dropped = es->tx_discards;
 813
 814         /* Get the port data only if this is the main PF VSI */
 815         if (vsi == pf->vsi[pf->lan_vsi]) {
 816                 struct i40e_hw_port_stats *nsd = &pf->stats;
 817                 struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 818
 819                 i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
 820                                    I40E_GLPRT_GORCL(hw->port),
 821                                    pf->stat_offsets_loaded,
 822                                    &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
 823                 i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
 824                                    I40E_GLPRT_GOTCL(hw->port),
 825                                    pf->stat_offsets_loaded,
 826                                    &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
 827                 i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
 828                                    pf->stat_offsets_loaded,
 829                                    &osd->eth.rx_discards,
 830                                    &nsd->eth.rx_discards);
 831                 i40e_stat_update32(hw, I40E_GLPRT_TDPC(hw->port),
 832                                    pf->stat_offsets_loaded,
 833                                    &osd->eth.tx_discards,
 834                                    &nsd->eth.tx_discards);
 835                 i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
 836                                    I40E_GLPRT_MPRCL(hw->port),
 837                                    pf->stat_offsets_loaded,
 838                                    &osd->eth.rx_multicast,
 839                                    &nsd->eth.rx_multicast);
 840
 841                 i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
 842                                    pf->stat_offsets_loaded,
 843                                    &osd->tx_dropped_link_down,
 844                                    &nsd->tx_dropped_link_down);
 845
 846                 i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
 847                                    pf->stat_offsets_loaded,
 848                                    &osd->crc_errors, &nsd->crc_errors);
 849                 ns->rx_crc_errors = nsd->crc_errors;
 850
 851                 i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
 852                                    pf->stat_offsets_loaded,
 853                                    &osd->illegal_bytes, &nsd->illegal_bytes);
 854                 ns->rx_errors = nsd->crc_errors
 855                                 + nsd->illegal_bytes;
 856
 857                 i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
 858                                    pf->stat_offsets_loaded,
 859                                    &osd->mac_local_faults,
 860                                    &nsd->mac_local_faults);
 861                 i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
 862                                    pf->stat_offsets_loaded,
 863                                    &osd->mac_remote_faults,
 864                                    &nsd->mac_remote_faults);
 865
 866                 i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
 867                                    pf->stat_offsets_loaded,
 868                                    &osd->rx_length_errors,
 869                                    &nsd->rx_length_errors);
 870                 ns->rx_length_errors = nsd->rx_length_errors;
 871
 872                 i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
 873                                    pf->stat_offsets_loaded,
 874                                    &osd->link_xon_rx, &nsd->link_xon_rx);
 875                 i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
 876                                    pf->stat_offsets_loaded,
 877                                    &osd->link_xon_tx, &nsd->link_xon_tx);
 878                 i40e_update_prio_xoff_rx(pf);  /* handles I40E_GLPRT_LXOFFRXC */
 879                 i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
 880                                    pf->stat_offsets_loaded,
 881                                    &osd->link_xoff_tx, &nsd->link_xoff_tx);
 882
 883                 for (i = 0; i < 8; i++) {
 884                         i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
 885                                            pf->stat_offsets_loaded,
 886                                            &osd->priority_xon_rx[i],
 887                                            &nsd->priority_xon_rx[i]);
 888                         i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
 889                                            pf->stat_offsets_loaded,
 890                                            &osd->priority_xon_tx[i],
 891                                            &nsd->priority_xon_tx[i]);
 892                         i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
 893                                            pf->stat_offsets_loaded,
 894                                            &osd->priority_xoff_tx[i],
 895                                            &nsd->priority_xoff_tx[i]);
 896                         i40e_stat_update32(hw,
 897                                            I40E_GLPRT_RXON2OFFCNT(hw->port, i),
 898                                            pf->stat_offsets_loaded,
 899                                            &osd->priority_xon_2_xoff[i],
 900                                            &nsd->priority_xon_2_xoff[i]);
 901                 }
 902
 903                 i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
 904                                    I40E_GLPRT_PRC64L(hw->port),
 905                                    pf->stat_offsets_loaded,
 906                                    &osd->rx_size_64, &nsd->rx_size_64);
 907                 i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
 908                                    I40E_GLPRT_PRC127L(hw->port),
 909                                    pf->stat_offsets_loaded,
 910                                    &osd->rx_size_127, &nsd->rx_size_127);
 911                 i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
 912                                    I40E_GLPRT_PRC255L(hw->port),
 913                                    pf->stat_offsets_loaded,
 914                                    &osd->rx_size_255, &nsd->rx_size_255);
 915                 i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
 916                                    I40E_GLPRT_PRC511L(hw->port),
 917                                    pf->stat_offsets_loaded,
 918                                    &osd->rx_size_511, &nsd->rx_size_511);
 919                 i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
 920                                    I40E_GLPRT_PRC1023L(hw->port),
 921                                    pf->stat_offsets_loaded,
 922                                    &osd->rx_size_1023, &nsd->rx_size_1023);
 923                 i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
 924                                    I40E_GLPRT_PRC1522L(hw->port),
 925                                    pf->stat_offsets_loaded,
 926                                    &osd->rx_size_1522, &nsd->rx_size_1522);
 927                 i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
 928                                    I40E_GLPRT_PRC9522L(hw->port),
 929                                    pf->stat_offsets_loaded,
 930                                    &osd->rx_size_big, &nsd->rx_size_big);
 931
 932                 i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
 933                                    I40E_GLPRT_PTC64L(hw->port),
 934                                    pf->stat_offsets_loaded,
 935                                    &osd->tx_size_64, &nsd->tx_size_64);
 936                 i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
 937                                    I40E_GLPRT_PTC127L(hw->port),
 938                                    pf->stat_offsets_loaded,
 939                                    &osd->tx_size_127, &nsd->tx_size_127);
 940                 i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
 941                                    I40E_GLPRT_PTC255L(hw->port),
 942                                    pf->stat_offsets_loaded,
 943                                    &osd->tx_size_255, &nsd->tx_size_255);
 944                 i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
 945                                    I40E_GLPRT_PTC511L(hw->port),
 946                                    pf->stat_offsets_loaded,
 947                                    &osd->tx_size_511, &nsd->tx_size_511);
 948                 i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
 949                                    I40E_GLPRT_PTC1023L(hw->port),
 950                                    pf->stat_offsets_loaded,
 951                                    &osd->tx_size_1023, &nsd->tx_size_1023);
 952                 i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
 953                                    I40E_GLPRT_PTC1522L(hw->port),
 954                                    pf->stat_offsets_loaded,
 955                                    &osd->tx_size_1522, &nsd->tx_size_1522);
 956                 i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
 957                                    I40E_GLPRT_PTC9522L(hw->port),
 958                                    pf->stat_offsets_loaded,
 959                                    &osd->tx_size_big, &nsd->tx_size_big);
 960
 961                 i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
 962                                    pf->stat_offsets_loaded,
 963                                    &osd->rx_undersize, &nsd->rx_undersize);
 964                 i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
 965                                    pf->stat_offsets_loaded,
 966                                    &osd->rx_fragments, &nsd->rx_fragments);
 967                 i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
 968                                    pf->stat_offsets_loaded,
 969                                    &osd->rx_oversize, &nsd->rx_oversize);
 970                 i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
 971                                    pf->stat_offsets_loaded,
 972                                    &osd->rx_jabber, &nsd->rx_jabber);
 973         }
 974
 975         pf->stat_offsets_loaded = true;
 976 }
 977
 978 /**
 979  * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
 980  * @vsi: the VSI to be searched
 981  * @macaddr: the MAC address
 982  * @vlan: the vlan
 983  * @is_vf: make sure its a vf filter, else doesn't matter
 984  * @is_netdev: make sure its a netdev filter, else doesn't matter
 985  *
 986  * Returns ptr to the filter object or NULL
 987  **/
 988 static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
 989                                                 u8 *macaddr, s16 vlan,
 990                                                 bool is_vf, bool is_netdev)
 991 {
 992         struct i40e_mac_filter *f;
 993
 994         if (!vsi || !macaddr)
 995                 return NULL;
 996
 997         list_for_each_entry(f, &vsi->mac_filter_list, list) {
 998                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
 999                     (vlan == f->vlan)    &&
1000                     (!is_vf || f->is_vf) &&
1001                     (!is_netdev || f->is_netdev))
1002                         return f;
1003         }
1004         return NULL;
1005 }
1006
1007 /**
1008  * i40e_find_mac - Find a mac addr in the macvlan filters list
1009  * @vsi: the VSI to be searched
1010  * @macaddr: the MAC address we are searching for
1011  * @is_vf: make sure its a vf filter, else doesn't matter
1012  * @is_netdev: make sure its a netdev filter, else doesn't matter
1013  *
1014  * Returns the first filter with the provided MAC address or NULL if
1015  * MAC address was not found
1016  **/
1017 struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, u8 *macaddr,
1018                                       bool is_vf, bool is_netdev)
1019 {
1020         struct i40e_mac_filter *f;
1021
1022         if (!vsi || !macaddr)
1023                 return NULL;
1024
1025         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1026                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1027                     (!is_vf || f->is_vf) &&
1028                     (!is_netdev || f->is_netdev))
1029                         return f;
1030         }
1031         return NULL;
1032 }
1033
1034 /**
1035  * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
1036  * @vsi: the VSI to be searched
1037  *
1038  * Returns true if VSI is in vlan mode or false otherwise
1039  **/
1040 bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
1041 {
1042         struct i40e_mac_filter *f;
1043
1044         /* Only -1 for all the filters denotes not in vlan mode
1045          * so we have to go through all the list in order to make sure
1046          */
1047         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1048                 if (f->vlan >= 0)
1049                         return true;
1050         }
1051
1052         return false;
1053 }
1054
1055 /**
1056  * i40e_put_mac_in_vlan - Make macvlan filters from macaddrs and vlans
1057  * @vsi: the VSI to be searched
1058  * @macaddr: the mac address to be filtered
1059  * @is_vf: true if it is a vf
1060  * @is_netdev: true if it is a netdev
1061  *
1062  * Goes through all the macvlan filters and adds a
1063  * macvlan filter for each unique vlan that already exists
1064  *
1065  * Returns first filter found on success, else NULL
1066  **/
1067 struct i40e_mac_filter *i40e_put_mac_in_vlan(struct i40e_vsi *vsi, u8 *macaddr,
1068                                              bool is_vf, bool is_netdev)
1069 {
1070         struct i40e_mac_filter *f;
1071
1072         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1073                 if (!i40e_find_filter(vsi, macaddr, f->vlan,
1074                                       is_vf, is_netdev)) {
1075                         if (!i40e_add_filter(vsi, macaddr, f->vlan,
1076                                                 is_vf, is_netdev))
1077                                 return NULL;
1078                 }
1079         }
1080
1081         return list_first_entry_or_null(&vsi->mac_filter_list,
1082                                         struct i40e_mac_filter, list);
1083 }
1084
1085 /**
1086  * i40e_add_filter - Add a mac/vlan filter to the VSI
1087  * @vsi: the VSI to be searched
1088  * @macaddr: the MAC address
1089  * @vlan: the vlan
1090  * @is_vf: make sure its a vf filter, else doesn't matter
1091  * @is_netdev: make sure its a netdev filter, else doesn't matter
1092  *
1093  * Returns ptr to the filter object or NULL when no memory available.
1094  **/
1095 struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
1096                                         u8 *macaddr, s16 vlan,
1097                                         bool is_vf, bool is_netdev)
1098 {
1099         struct i40e_mac_filter *f;
1100
1101         if (!vsi || !macaddr)
1102                 return NULL;
1103
1104         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1105         if (!f) {
1106                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
1107                 if (!f)
1108                         goto add_filter_out;
1109
1110                 memcpy(f->macaddr, macaddr, ETH_ALEN);
1111                 f->vlan = vlan;
1112                 f->changed = true;
1113
1114                 INIT_LIST_HEAD(&f->list);
1115                 list_add(&f->list, &vsi->mac_filter_list);
1116         }
1117
1118         /* increment counter and add a new flag if needed */
1119         if (is_vf) {
1120                 if (!f->is_vf) {
1121                         f->is_vf = true;
1122                         f->counter++;
1123                 }
1124         } else if (is_netdev) {
1125                 if (!f->is_netdev) {
1126                         f->is_netdev = true;
1127                         f->counter++;
1128                 }
1129         } else {
1130                 f->counter++;
1131         }
1132
1133         /* changed tells sync_filters_subtask to
1134          * push the filter down to the firmware
1135          */
1136         if (f->changed) {
1137                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1138                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1139         }
1140
1141 add_filter_out:
1142         return f;
1143 }
1144
1145 /**
1146  * i40e_del_filter - Remove a mac/vlan filter from the VSI
1147  * @vsi: the VSI to be searched
1148  * @macaddr: the MAC address
1149  * @vlan: the vlan
1150  * @is_vf: make sure it's a vf filter, else doesn't matter
1151  * @is_netdev: make sure it's a netdev filter, else doesn't matter
1152  **/
1153 void i40e_del_filter(struct i40e_vsi *vsi,
1154                      u8 *macaddr, s16 vlan,
1155                      bool is_vf, bool is_netdev)
1156 {
1157         struct i40e_mac_filter *f;
1158
1159         if (!vsi || !macaddr)
1160                 return;
1161
1162         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1163         if (!f || f->counter == 0)
1164                 return;
1165
1166         if (is_vf) {
1167                 if (f->is_vf) {
1168                         f->is_vf = false;
1169                         f->counter--;
1170                 }
1171         } else if (is_netdev) {
1172                 if (f->is_netdev) {
1173                         f->is_netdev = false;
1174                         f->counter--;
1175                 }
1176         } else {
1177                 /* make sure we don't remove a filter in use by vf or netdev */
1178                 int min_f = 0;
1179                 min_f += (f->is_vf ? 1 : 0);
1180                 min_f += (f->is_netdev ? 1 : 0);
1181
1182                 if (f->counter > min_f)
1183                         f->counter--;
1184         }
1185
1186         /* counter == 0 tells sync_filters_subtask to
1187          * remove the filter from the firmware's list
1188          */
1189         if (f->counter == 0) {
1190                 f->changed = true;
1191                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1192                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1193         }
1194 }
1195
1196 /**
1197  * i40e_set_mac - NDO callback to set mac address
1198  * @netdev: network interface device structure
1199  * @p: pointer to an address structure
1200  *
1201  * Returns 0 on success, negative on failure
1202  **/
1203 static int i40e_set_mac(struct net_device *netdev, void *p)
1204 {
1205         struct i40e_netdev_priv *np = netdev_priv(netdev);
1206         struct i40e_vsi *vsi = np->vsi;
1207         struct sockaddr *addr = p;
1208         struct i40e_mac_filter *f;
1209
1210         if (!is_valid_ether_addr(addr->sa_data))
1211                 return -EADDRNOTAVAIL;
1212
1213         netdev_info(netdev, "set mac address=%pM\n", addr->sa_data);
1214
1215         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
1216                 return 0;
1217
1218         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1219             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1220                 return -EADDRNOTAVAIL;
1221
1222         if (vsi->type == I40E_VSI_MAIN) {
1223                 i40e_status ret;
1224                 ret = i40e_aq_mac_address_write(&vsi->back->hw,
1225                                                 I40E_AQC_WRITE_TYPE_LAA_ONLY,
1226                                                 addr->sa_data, NULL);
1227                 if (ret) {
1228                         netdev_info(netdev,
1229                                     "Addr change for Main VSI failed: %d\n",
1230                                     ret);
1231                         return -EADDRNOTAVAIL;
1232                 }
1233
1234                 memcpy(vsi->back->hw.mac.addr, addr->sa_data, netdev->addr_len);
1235         }
1236
1237         /* In order to be sure to not drop any packets, add the new address
1238          * then delete the old one.
1239          */
1240         f = i40e_add_filter(vsi, addr->sa_data, I40E_VLAN_ANY, false, false);
1241         if (!f)
1242                 return -ENOMEM;
1243
1244         i40e_sync_vsi_filters(vsi);
1245         i40e_del_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY, false, false);
1246         i40e_sync_vsi_filters(vsi);
1247
1248         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1249
1250         return 0;
1251 }
1252
1253 /**
1254  * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
1255  * @vsi: the VSI being setup
1256  * @ctxt: VSI context structure
1257  * @enabled_tc: Enabled TCs bitmap
1258  * @is_add: True if called before Add VSI
1259  *
1260  * Setup VSI queue mapping for enabled traffic classes.
1261  **/
1262 static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1263                                      struct i40e_vsi_context *ctxt,
1264                                      u8 enabled_tc,
1265                                      bool is_add)
1266 {
1267         struct i40e_pf *pf = vsi->back;
1268         u16 sections = 0;
1269         u8 netdev_tc = 0;
1270         u16 numtc = 0;
1271         u16 qcount;
1272         u8 offset;
1273         u16 qmap;
1274         int i;
1275
1276         sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
1277         offset = 0;
1278
1279         if (enabled_tc && (vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
1280                 /* Find numtc from enabled TC bitmap */
1281                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1282                         if (enabled_tc & (1 << i)) /* TC is enabled */
1283                                 numtc++;
1284                 }
1285                 if (!numtc) {
1286                         dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
1287                         numtc = 1;
1288                 }
1289         } else {
1290                 /* At least TC0 is enabled in case of non-DCB case */
1291                 numtc = 1;
1292         }
1293
1294         vsi->tc_config.numtc = numtc;
1295         vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
1296
1297         /* Setup queue offset/count for all TCs for given VSI */
1298         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1299                 /* See if the given TC is enabled for the given VSI */
1300                 if (vsi->tc_config.enabled_tc & (1 << i)) { /* TC is enabled */
1301                         int pow, num_qps;
1302
1303                         vsi->tc_config.tc_info[i].qoffset = offset;
1304                         switch (vsi->type) {
1305                         case I40E_VSI_MAIN:
1306                                 if (i == 0)
1307                                         qcount = pf->rss_size;
1308                                 else
1309                                         qcount = pf->num_tc_qps;
1310                                 vsi->tc_config.tc_info[i].qcount = qcount;
1311                                 break;
1312                         case I40E_VSI_FDIR:
1313                         case I40E_VSI_SRIOV:
1314                         case I40E_VSI_VMDQ2:
1315                         default:
1316                                 qcount = vsi->alloc_queue_pairs;
1317                                 vsi->tc_config.tc_info[i].qcount = qcount;
1318                                 WARN_ON(i != 0);
1319                                 break;
1320                         }
1321
1322                         /* find the power-of-2 of the number of queue pairs */
1323                         num_qps = vsi->tc_config.tc_info[i].qcount;
1324                         pow = 0;
1325                         while (num_qps &&
1326                               ((1 << pow) < vsi->tc_config.tc_info[i].qcount)) {
1327                                 pow++;
1328                                 num_qps >>= 1;
1329                         }
1330
1331                         vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
1332                         qmap =
1333                             (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
1334                             (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);
1335
1336                         offset += vsi->tc_config.tc_info[i].qcount;
1337                 } else {
1338                         /* TC is not enabled so set the offset to
1339                          * default queue and allocate one queue
1340                          * for the given TC.
1341                          */
1342                         vsi->tc_config.tc_info[i].qoffset = 0;
1343                         vsi->tc_config.tc_info[i].qcount = 1;
1344                         vsi->tc_config.tc_info[i].netdev_tc = 0;
1345
1346                         qmap = 0;
1347                 }
1348                 ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
1349         }
1350
1351         /* Set actual Tx/Rx queue pairs */
1352         vsi->num_queue_pairs = offset;
1353
1354         /* Scheduler section valid can only be set for ADD VSI */
1355         if (is_add) {
1356                 sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
1357
1358                 ctxt->info.up_enable_bits = enabled_tc;
1359         }
1360         if (vsi->type == I40E_VSI_SRIOV) {
1361                 ctxt->info.mapping_flags |=
1362                                      cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
1363                 for (i = 0; i < vsi->num_queue_pairs; i++)
1364                         ctxt->info.queue_mapping[i] =
1365                                                cpu_to_le16(vsi->base_queue + i);
1366         } else {
1367                 ctxt->info.mapping_flags |=
1368                                         cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
1369                 ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
1370         }
1371         ctxt->info.valid_sections |= cpu_to_le16(sections);
1372 }
1373
1374 /**
1375  * i40e_set_rx_mode - NDO callback to set the netdev filters
1376  * @netdev: network interface device structure
1377  **/
1378 static void i40e_set_rx_mode(struct net_device *netdev)
1379 {
1380         struct i40e_netdev_priv *np = netdev_priv(netdev);
1381         struct i40e_mac_filter *f, *ftmp;
1382         struct i40e_vsi *vsi = np->vsi;
1383         struct netdev_hw_addr *uca;
1384         struct netdev_hw_addr *mca;
1385         struct netdev_hw_addr *ha;
1386
1387         /* add addr if not already in the filter list */
1388         netdev_for_each_uc_addr(uca, netdev) {
1389                 if (!i40e_find_mac(vsi, uca->addr, false, true)) {
1390                         if (i40e_is_vsi_in_vlan(vsi))
1391                                 i40e_put_mac_in_vlan(vsi, uca->addr,
1392                                                      false, true);
1393                         else
1394                                 i40e_add_filter(vsi, uca->addr, I40E_VLAN_ANY,
1395                                                 false, true);
1396                 }
1397         }
1398
1399         netdev_for_each_mc_addr(mca, netdev) {
1400                 if (!i40e_find_mac(vsi, mca->addr, false, true)) {
1401                         if (i40e_is_vsi_in_vlan(vsi))
1402                                 i40e_put_mac_in_vlan(vsi, mca->addr,
1403                                                      false, true);
1404                         else
1405                                 i40e_add_filter(vsi, mca->addr, I40E_VLAN_ANY,
1406                                                 false, true);
1407                 }
1408         }
1409
1410         /* remove filter if not in netdev list */
1411         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1412                 bool found = false;
1413
1414                 if (!f->is_netdev)
1415                         continue;
1416
1417                 if (is_multicast_ether_addr(f->macaddr)) {
1418                         netdev_for_each_mc_addr(mca, netdev) {
1419                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
1420                                         found = true;
1421                                         break;
1422                                 }
1423                         }
1424                 } else {
1425                         netdev_for_each_uc_addr(uca, netdev) {
1426                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
1427                                         found = true;
1428                                         break;
1429                                 }
1430                         }
1431
1432                         for_each_dev_addr(netdev, ha) {
1433                                 if (ether_addr_equal(ha->addr, f->macaddr)) {
1434                                         found = true;
1435                                         break;
1436                                 }
1437                         }
1438                 }
1439                 if (!found)
1440                         i40e_del_filter(
1441                            vsi, f->macaddr, I40E_VLAN_ANY, false, true);
1442         }
1443
1444         /* check for other flag changes */
1445         if (vsi->current_netdev_flags != vsi->netdev->flags) {
1446                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1447                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1448         }
1449 }
1450
1451 /**
1452  * i40e_sync_vsi_filters - Update the VSI filter list to the HW
1453  * @vsi: ptr to the VSI
1454  *
1455  * Push any outstanding VSI filter changes through the AdminQ.
1456  *
1457  * Returns 0 or error value
1458  **/
1459 int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
1460 {
1461         struct i40e_mac_filter *f, *ftmp;
1462         bool promisc_forced_on = false;
1463         bool add_happened = false;
1464         int filter_list_len = 0;
1465         u32 changed_flags = 0;
1466         i40e_status aq_ret = 0;
1467         struct i40e_pf *pf;
1468         int num_add = 0;
1469         int num_del = 0;
1470         u16 cmd_flags;
1471
1472         /* empty array typed pointers, kcalloc later */
1473         struct i40e_aqc_add_macvlan_element_data *add_list;
1474         struct i40e_aqc_remove_macvlan_element_data *del_list;
1475
1476         while (test_and_set_bit(__I40E_CONFIG_BUSY, &vsi->state))
1477                 usleep_range(1000, 2000);
1478         pf = vsi->back;
1479
1480         if (vsi->netdev) {
1481                 changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
1482                 vsi->current_netdev_flags = vsi->netdev->flags;
1483         }
1484
1485         if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
1486                 vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;
1487
1488                 filter_list_len = pf->hw.aq.asq_buf_size /
1489                             sizeof(struct i40e_aqc_remove_macvlan_element_data);
1490                 del_list = kcalloc(filter_list_len,
1491                             sizeof(struct i40e_aqc_remove_macvlan_element_data),
1492                             GFP_KERNEL);
1493                 if (!del_list)
1494                         return -ENOMEM;
1495
1496                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1497                         if (!f->changed)
1498                                 continue;
1499
1500                         if (f->counter != 0)
1501                                 continue;
1502                         f->changed = false;
1503                         cmd_flags = 0;
1504
1505                         /* add to delete list */
1506                         memcpy(del_list[num_del].mac_addr,
1507                                f->macaddr, ETH_ALEN);
1508                         del_list[num_del].vlan_tag =
1509                                 cpu_to_le16((u16)(f->vlan ==
1510                                             I40E_VLAN_ANY ? 0 : f->vlan));
1511
1512                         cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
1513                         del_list[num_del].flags = cmd_flags;
1514                         num_del++;
1515
1516                         /* unlink from filter list */
1517                         list_del(&f->list);
1518                         kfree(f);
1519
1520                         /* flush a full buffer */
1521                         if (num_del == filter_list_len) {
1522                                 aq_ret = i40e_aq_remove_macvlan(&pf->hw,
1523                                             vsi->seid, del_list, num_del,
1524                                             NULL);
1525                                 num_del = 0;
1526                                 memset(del_list, 0, sizeof(*del_list));
1527
1528                                 if (aq_ret)
1529                                         dev_info(&pf->pdev->dev,
1530                                                  "ignoring delete macvlan error, err %d, aq_err %d while flushing a full buffer\n",
1531                                                  aq_ret,
1532                                                  pf->hw.aq.asq_last_status);
1533                         }
1534                 }
1535                 if (num_del) {
1536                         aq_ret = i40e_aq_remove_macvlan(&pf->hw, vsi->seid,
1537                                                      del_list, num_del, NULL);
1538                         num_del = 0;
1539
1540                         if (aq_ret)
1541                                 dev_info(&pf->pdev->dev,
1542                                          "ignoring delete macvlan error, err %d, aq_err %d\n",
1543                                          aq_ret, pf->hw.aq.asq_last_status);
1544                 }
1545
1546                 kfree(del_list);
1547                 del_list = NULL;
1548
1549                 /* do all the adds now */
1550                 filter_list_len = pf->hw.aq.asq_buf_size /
1551                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1552                 add_list = kcalloc(filter_list_len,
1553                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1554                                GFP_KERNEL);
1555                 if (!add_list)
1556                         return -ENOMEM;
1557
1558                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1559                         if (!f->changed)
1560                                 continue;
1561
1562                         if (f->counter == 0)
1563                                 continue;
1564                         f->changed = false;
1565                         add_happened = true;
1566                         cmd_flags = 0;
1567
1568                         /* add to add array */
1569                         memcpy(add_list[num_add].mac_addr,
1570                                f->macaddr, ETH_ALEN);
1571                         add_list[num_add].vlan_tag =
1572                                 cpu_to_le16(
1573                                  (u16)(f->vlan == I40E_VLAN_ANY ? 0 : f->vlan));
1574                         add_list[num_add].queue_number = 0;
1575
1576                         cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
1577                         add_list[num_add].flags = cpu_to_le16(cmd_flags);
1578                         num_add++;
1579
1580                         /* flush a full buffer */
1581                         if (num_add == filter_list_len) {
1582                                 aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1583                                                              add_list, num_add,
1584                                                              NULL);
1585                                 num_add = 0;
1586
1587                                 if (aq_ret)
1588                                         break;
1589                                 memset(add_list, 0, sizeof(*add_list));
1590                         }
1591                 }
1592                 if (num_add) {
1593                         aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1594                                                      add_list, num_add, NULL);
1595                         num_add = 0;
1596                 }
1597                 kfree(add_list);
1598                 add_list = NULL;
1599
1600                 if (add_happened && (!aq_ret)) {
1601                         /* do nothing */;
1602                 } else if (add_happened && (aq_ret)) {
1603                         dev_info(&pf->pdev->dev,
1604                                  "add filter failed, err %d, aq_err %d\n",
1605                                  aq_ret, pf->hw.aq.asq_last_status);
1606                         if ((pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOSPC) &&
1607                             !test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1608                                       &vsi->state)) {
1609                                 promisc_forced_on = true;
1610                                 set_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1611                                         &vsi->state);
1612                                 dev_info(&pf->pdev->dev, "promiscuous mode forced on\n");
1613                         }
1614                 }
1615         }
1616
1617         /* check for changes in promiscuous modes */
1618         if (changed_flags & IFF_ALLMULTI) {
1619                 bool cur_multipromisc;
1620                 cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
1621                 aq_ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
1622                                                                vsi->seid,
1623                                                                cur_multipromisc,
1624                                                                NULL);
1625                 if (aq_ret)
1626                         dev_info(&pf->pdev->dev,
1627                                  "set multi promisc failed, err %d, aq_err %d\n",
1628                                  aq_ret, pf->hw.aq.asq_last_status);
1629         }
1630         if ((changed_flags & IFF_PROMISC) || promisc_forced_on) {
1631                 bool cur_promisc;
1632                 cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
1633                                test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1634                                         &vsi->state));
1635                 aq_ret = i40e_aq_set_vsi_unicast_promiscuous(&vsi->back->hw,
1636                                                              vsi->seid,
1637                                                              cur_promisc, NULL);
1638                 if (aq_ret)
1639                         dev_info(&pf->pdev->dev,
1640                                  "set uni promisc failed, err %d, aq_err %d\n",
1641                                  aq_ret, pf->hw.aq.asq_last_status);
1642                 aq_ret = i40e_aq_set_vsi_broadcast(&vsi->back->hw,
1643                                                    vsi->seid,
1644                                                    cur_promisc, NULL);
1645                 if (aq_ret)
1646                         dev_info(&pf->pdev->dev,
1647                                  "set brdcast promisc failed, err %d, aq_err %d\n",
1648                                  aq_ret, pf->hw.aq.asq_last_status);
1649         }
1650
1651         clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
1652         return 0;
1653 }
1654
1655 /**
1656  * i40e_sync_filters_subtask - Sync the VSI filter list with HW
1657  * @pf: board private structure
1658  **/
1659 static void i40e_sync_filters_subtask(struct i40e_pf *pf)
1660 {
1661         int v;
1662
1663         if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
1664                 return;
1665         pf->flags &= ~I40E_FLAG_FILTER_SYNC;
1666
1667         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
1668                 if (pf->vsi[v] &&
1669                     (pf->vsi[v]->flags & I40E_VSI_FLAG_FILTER_CHANGED))
1670                         i40e_sync_vsi_filters(pf->vsi[v]);
1671         }
1672 }
1673
1674 /**
1675  * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
1676  * @netdev: network interface device structure
1677  * @new_mtu: new value for maximum frame size
1678  *
1679  * Returns 0 on success, negative on failure
1680  **/
1681 static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
1682 {
1683         struct i40e_netdev_priv *np = netdev_priv(netdev);
1684         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1685         struct i40e_vsi *vsi = np->vsi;
1686
1687         /* MTU < 68 is an error and causes problems on some kernels */
1688         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1689                 return -EINVAL;
1690
1691         netdev_info(netdev, "changing MTU from %d to %d\n",
1692                     netdev->mtu, new_mtu);
1693         netdev->mtu = new_mtu;
1694         if (netif_running(netdev))
1695                 i40e_vsi_reinit_locked(vsi);
1696
1697         return 0;
1698 }
1699
1700 /**
1701  * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
1702  * @vsi: the vsi being adjusted
1703  **/
1704 void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
1705 {
1706         struct i40e_vsi_context ctxt;
1707         i40e_status ret;
1708
1709         if ((vsi->info.valid_sections &
1710              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1711             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
1712                 return;  /* already enabled */
1713
1714         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1715         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1716                                     I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;
1717
1718         ctxt.seid = vsi->seid;
1719         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1720         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1721         if (ret) {
1722                 dev_info(&vsi->back->pdev->dev,
1723                          "%s: update vsi failed, aq_err=%d\n",
1724                          __func__, vsi->back->hw.aq.asq_last_status);
1725         }
1726 }
1727
1728 /**
1729  * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
1730  * @vsi: the vsi being adjusted
1731  **/
1732 void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
1733 {
1734         struct i40e_vsi_context ctxt;
1735         i40e_status ret;
1736
1737         if ((vsi->info.valid_sections &
1738              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1739             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
1740              I40E_AQ_VSI_PVLAN_EMOD_MASK))
1741                 return;  /* already disabled */
1742
1743         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1744         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1745                                     I40E_AQ_VSI_PVLAN_EMOD_NOTHING;
1746
1747         ctxt.seid = vsi->seid;
1748         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1749         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1750         if (ret) {
1751                 dev_info(&vsi->back->pdev->dev,
1752                          "%s: update vsi failed, aq_err=%d\n",
1753                          __func__, vsi->back->hw.aq.asq_last_status);
1754         }
1755 }
1756
1757 /**
1758  * i40e_vlan_rx_register - Setup or shutdown vlan offload
1759  * @netdev: network interface to be adjusted
1760  * @features: netdev features to test if VLAN offload is enabled or not
1761  **/
1762 static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
1763 {
1764         struct i40e_netdev_priv *np = netdev_priv(netdev);
1765         struct i40e_vsi *vsi = np->vsi;
1766
1767         if (features & NETIF_F_HW_VLAN_CTAG_RX)
1768                 i40e_vlan_stripping_enable(vsi);
1769         else
1770                 i40e_vlan_stripping_disable(vsi);
1771 }
1772
1773 /**
1774  * i40e_vsi_add_vlan - Add vsi membership for given vlan
1775  * @vsi: the vsi being configured
1776  * @vid: vlan id to be added (0 = untagged only , -1 = any)
1777  **/
1778 int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
1779 {
1780         struct i40e_mac_filter *f, *add_f;
1781         bool is_netdev, is_vf;
1782
1783         is_vf = (vsi->type == I40E_VSI_SRIOV);
1784         is_netdev = !!(vsi->netdev);
1785
1786         if (is_netdev) {
1787                 add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, vid,
1788                                         is_vf, is_netdev);
1789                 if (!add_f) {
1790                         dev_info(&vsi->back->pdev->dev,
1791                                  "Could not add vlan filter %d for %pM\n",
1792                                  vid, vsi->netdev->dev_addr);
1793                         return -ENOMEM;
1794                 }
1795         }
1796
1797         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1798                 add_f = i40e_add_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1799                 if (!add_f) {
1800                         dev_info(&vsi->back->pdev->dev,
1801                                  "Could not add vlan filter %d for %pM\n",
1802                                  vid, f->macaddr);
1803                         return -ENOMEM;
1804                 }
1805         }
1806
1807         /* Now if we add a vlan tag, make sure to check if it is the first
1808          * tag (i.e. a "tag" -1 does exist) and if so replace the -1 "tag"
1809          * with 0, so we now accept untagged and specified tagged traffic
1810          * (and not any taged and untagged)
1811          */
1812         if (vid > 0) {
1813                 if (is_netdev && i40e_find_filter(vsi, vsi->netdev->dev_addr,
1814                                                   I40E_VLAN_ANY,
1815                                                   is_vf, is_netdev)) {
1816                         i40e_del_filter(vsi, vsi->netdev->dev_addr,
1817                                         I40E_VLAN_ANY, is_vf, is_netdev);
1818                         add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, 0,
1819                                                 is_vf, is_netdev);
1820                         if (!add_f) {
1821                                 dev_info(&vsi->back->pdev->dev,
1822                                          "Could not add filter 0 for %pM\n",
1823                                          vsi->netdev->dev_addr);
1824                                 return -ENOMEM;
1825                         }
1826                 }
1827
1828                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1829                         if (i40e_find_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1830                                              is_vf, is_netdev)) {
1831                                 i40e_del_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1832                                                 is_vf, is_netdev);
1833                                 add_f = i40e_add_filter(vsi, f->macaddr,
1834                                                         0, is_vf, is_netdev);
1835                                 if (!add_f) {
1836                                         dev_info(&vsi->back->pdev->dev,
1837                                                  "Could not add filter 0 for %pM\n",
1838                                                  f->macaddr);
1839                                         return -ENOMEM;
1840                                 }
1841                         }
1842                 }
1843         }
1844
1845         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1846             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1847                 return 0;
1848
1849         return i40e_sync_vsi_filters(vsi);
1850 }
1851
1852 /**
1853  * i40e_vsi_kill_vlan - Remove vsi membership for given vlan
1854  * @vsi: the vsi being configured
1855  * @vid: vlan id to be removed (0 = untagged only , -1 = any)
1856  *
1857  * Return: 0 on success or negative otherwise
1858  **/
1859 int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
1860 {
1861         struct net_device *netdev = vsi->netdev;
1862         struct i40e_mac_filter *f, *add_f;
1863         bool is_vf, is_netdev;
1864         int filter_count = 0;
1865
1866         is_vf = (vsi->type == I40E_VSI_SRIOV);
1867         is_netdev = !!(netdev);
1868
1869         if (is_netdev)
1870                 i40e_del_filter(vsi, netdev->dev_addr, vid, is_vf, is_netdev);
1871
1872         list_for_each_entry(f, &vsi->mac_filter_list, list)
1873                 i40e_del_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1874
1875         /* go through all the filters for this VSI and if there is only
1876          * vid == 0 it means there are no other filters, so vid 0 must
1877          * be replaced with -1. This signifies that we should from now
1878          * on accept any traffic (with any tag present, or untagged)
1879          */
1880         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1881                 if (is_netdev) {
1882                         if (f->vlan &&
1883                             ether_addr_equal(netdev->dev_addr, f->macaddr))
1884                                 filter_count++;
1885                 }
1886
1887                 if (f->vlan)
1888                         filter_count++;
1889         }
1890
1891         if (!filter_count && is_netdev) {
1892                 i40e_del_filter(vsi, netdev->dev_addr, 0, is_vf, is_netdev);
1893                 f = i40e_add_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY,
1894                                     is_vf, is_netdev);
1895                 if (!f) {
1896                         dev_info(&vsi->back->pdev->dev,
1897                                  "Could not add filter %d for %pM\n",
1898                                  I40E_VLAN_ANY, netdev->dev_addr);
1899                         return -ENOMEM;
1900                 }
1901         }
1902
1903         if (!filter_count) {
1904                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1905                         i40e_del_filter(vsi, f->macaddr, 0, is_vf, is_netdev);
1906                         add_f = i40e_add_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1907                                             is_vf, is_netdev);
1908                         if (!add_f) {
1909                                 dev_info(&vsi->back->pdev->dev,
1910                                          "Could not add filter %d for %pM\n",
1911                                          I40E_VLAN_ANY, f->macaddr);
1912                                 return -ENOMEM;
1913                         }
1914                 }
1915         }
1916
1917         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1918             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1919                 return 0;
1920
1921         return i40e_sync_vsi_filters(vsi);
1922 }
1923
1924 /**
1925  * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
1926  * @netdev: network interface to be adjusted
1927  * @vid: vlan id to be added
1928  *
1929  * net_device_ops implementation for adding vlan ids
1930  **/
1931 static int i40e_vlan_rx_add_vid(struct net_device *netdev,
1932                                 __always_unused __be16 proto, u16 vid)
1933 {
1934         struct i40e_netdev_priv *np = netdev_priv(netdev);
1935         struct i40e_vsi *vsi = np->vsi;
1936         int ret = 0;
1937
1938         if (vid > 4095)
1939                 return -EINVAL;
1940
1941         netdev_info(netdev, "adding %pM vid=%d\n", netdev->dev_addr, vid);
1942
1943         /* If the network stack called us with vid = 0, we should
1944          * indicate to i40e_vsi_add_vlan() that we want to receive
1945          * any traffic (i.e. with any vlan tag, or untagged)
1946          */
1947         ret = i40e_vsi_add_vlan(vsi, vid ? vid : I40E_VLAN_ANY);
1948
1949         if (!ret && (vid < VLAN_N_VID))
1950                 set_bit(vid, vsi->active_vlans);
1951
1952         return ret;
1953 }
1954
1955 /**
1956  * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
1957  * @netdev: network interface to be adjusted
1958  * @vid: vlan id to be removed
1959  *
1960  * net_device_ops implementation for adding vlan ids
1961  **/
1962 static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
1963                                  __always_unused __be16 proto, u16 vid)
1964 {
1965         struct i40e_netdev_priv *np = netdev_priv(netdev);
1966         struct i40e_vsi *vsi = np->vsi;
1967
1968         netdev_info(netdev, "removing %pM vid=%d\n", netdev->dev_addr, vid);
1969
1970         /* return code is ignored as there is nothing a user
1971          * can do about failure to remove and a log message was
1972          * already printed from the other function
1973          */
1974         i40e_vsi_kill_vlan(vsi, vid);
1975
1976         clear_bit(vid, vsi->active_vlans);
1977
1978         return 0;
1979 }
1980
1981 /**
1982  * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
1983  * @vsi: the vsi being brought back up
1984  **/
1985 static void i40e_restore_vlan(struct i40e_vsi *vsi)
1986 {
1987         u16 vid;
1988
1989         if (!vsi->netdev)
1990                 return;
1991
1992         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
1993
1994         for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
1995                 i40e_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q),
1996                                      vid);
1997 }
1998
1999 /**
2000  * i40e_vsi_add_pvid - Add pvid for the VSI
2001  * @vsi: the vsi being adjusted
2002  * @vid: the vlan id to set as a PVID
2003  **/
2004 int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
2005 {
2006         struct i40e_vsi_context ctxt;
2007         i40e_status aq_ret;
2008
2009         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2010         vsi->info.pvid = cpu_to_le16(vid);
2011         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_TAGGED |
2012                                     I40E_AQ_VSI_PVLAN_INSERT_PVID |
2013                                     I40E_AQ_VSI_PVLAN_EMOD_STR;
2014
2015         ctxt.seid = vsi->seid;
2016         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
2017         aq_ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2018         if (aq_ret) {
2019                 dev_info(&vsi->back->pdev->dev,
2020                          "%s: update vsi failed, aq_err=%d\n",
2021                          __func__, vsi->back->hw.aq.asq_last_status);
2022                 return -ENOENT;
2023         }
2024
2025         return 0;
2026 }
2027
2028 /**
2029  * i40e_vsi_remove_pvid - Remove the pvid from the VSI
2030  * @vsi: the vsi being adjusted
2031  *
2032  * Just use the vlan_rx_register() service to put it back to normal
2033  **/
2034 void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
2035 {
2036         i40e_vlan_stripping_disable(vsi);
2037
2038         vsi->info.pvid = 0;
2039 }
2040
2041 /**
2042  * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
2043  * @vsi: ptr to the VSI
2044  *
2045  * If this function returns with an error, then it's possible one or
2046  * more of the rings is populated (while the rest are not).  It is the
2047  * callers duty to clean those orphaned rings.
2048  *
2049  * Return 0 on success, negative on failure
2050  **/
2051 static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
2052 {
2053         int i, err = 0;
2054
2055         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2056                 err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);
2057
2058         return err;
2059 }
2060
2061 /**
2062  * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
2063  * @vsi: ptr to the VSI
2064  *
2065  * Free VSI's transmit software resources
2066  **/
2067 static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
2068 {
2069         int i;
2070
2071         if (!vsi->tx_rings)
2072                 return;
2073
2074         for (i = 0; i < vsi->num_queue_pairs; i++)
2075                 if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc)
2076                         i40e_free_tx_resources(vsi->tx_rings[i]);
2077 }
2078
2079 /**
2080  * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
2081  * @vsi: ptr to the VSI
2082  *
2083  * If this function returns with an error, then it's possible one or
2084  * more of the rings is populated (while the rest are not).  It is the
2085  * callers duty to clean those orphaned rings.
2086  *
2087  * Return 0 on success, negative on failure
2088  **/
2089 static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
2090 {
2091         int i, err = 0;
2092
2093         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2094                 err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
2095         return err;
2096 }
2097
2098 /**
2099  * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
2100  * @vsi: ptr to the VSI
2101  *
2102  * Free all receive software resources
2103  **/
2104 static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
2105 {
2106         int i;
2107
2108         if (!vsi->rx_rings)
2109                 return;
2110
2111         for (i = 0; i < vsi->num_queue_pairs; i++)
2112                 if (vsi->rx_rings[i] && vsi->rx_rings[i]->desc)
2113                         i40e_free_rx_resources(vsi->rx_rings[i]);
2114 }
2115
2116 /**
2117  * i40e_configure_tx_ring - Configure a transmit ring context and rest
2118  * @ring: The Tx ring to configure
2119  *
2120  * Configure the Tx descriptor ring in the HMC context.
2121  **/
2122 static int i40e_configure_tx_ring(struct i40e_ring *ring)
2123 {
2124         struct i40e_vsi *vsi = ring->vsi;
2125         u16 pf_q = vsi->base_queue + ring->queue_index;
2126         struct i40e_hw *hw = &vsi->back->hw;
2127         struct i40e_hmc_obj_txq tx_ctx;
2128         i40e_status err = 0;
2129         u32 qtx_ctl = 0;
2130
2131         /* some ATR related tx ring init */
2132         if (vsi->back->flags & I40E_FLAG_FDIR_ATR_ENABLED) {
2133                 ring->atr_sample_rate = vsi->back->atr_sample_rate;
2134                 ring->atr_count = 0;
2135         } else {
2136                 ring->atr_sample_rate = 0;
2137         }
2138
2139         /* initialize XPS */
2140         if (ring->q_vector && ring->netdev &&
2141             !test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
2142                 netif_set_xps_queue(ring->netdev,
2143                                     &ring->q_vector->affinity_mask,
2144                                     ring->queue_index);
2145
2146         /* clear the context structure first */
2147         memset(&tx_ctx, 0, sizeof(tx_ctx));
2148
2149         tx_ctx.new_context = 1;
2150         tx_ctx.base = (ring->dma / 128);
2151         tx_ctx.qlen = ring->count;
2152         tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FDIR_ENABLED |
2153                         I40E_FLAG_FDIR_ATR_ENABLED));
2154
2155         /* As part of VSI creation/update, FW allocates certain
2156          * Tx arbitration queue sets for each TC enabled for
2157          * the VSI. The FW returns the handles to these queue
2158          * sets as part of the response buffer to Add VSI,
2159          * Update VSI, etc. AQ commands. It is expected that
2160          * these queue set handles be associated with the Tx
2161          * queues by the driver as part of the TX queue context
2162          * initialization. This has to be done regardless of
2163          * DCB as by default everything is mapped to TC0.
2164          */
2165         tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);
2166         tx_ctx.rdylist_act = 0;
2167
2168         /* clear the context in the HMC */
2169         err = i40e_clear_lan_tx_queue_context(hw, pf_q);
2170         if (err) {
2171                 dev_info(&vsi->back->pdev->dev,
2172                          "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
2173                          ring->queue_index, pf_q, err);
2174                 return -ENOMEM;
2175         }
2176
2177         /* set the context in the HMC */
2178         err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
2179         if (err) {
2180                 dev_info(&vsi->back->pdev->dev,
2181                          "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
2182                          ring->queue_index, pf_q, err);
2183                 return -ENOMEM;
2184         }
2185
2186         /* Now associate this queue with this PCI function */
2187         qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
2188         qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT) &
2189                     I40E_QTX_CTL_PF_INDX_MASK);
2190         wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
2191         i40e_flush(hw);
2192
2193         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
2194
2195         /* cache tail off for easier writes later */
2196         ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);
2197
2198         return 0;
2199 }
2200
2201 /**
2202  * i40e_configure_rx_ring - Configure a receive ring context
2203  * @ring: The Rx ring to configure
2204  *
2205  * Configure the Rx descriptor ring in the HMC context.
2206  **/
2207 static int i40e_configure_rx_ring(struct i40e_ring *ring)
2208 {
2209         struct i40e_vsi *vsi = ring->vsi;
2210         u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
2211         u16 pf_q = vsi->base_queue + ring->queue_index;
2212         struct i40e_hw *hw = &vsi->back->hw;
2213         struct i40e_hmc_obj_rxq rx_ctx;
2214         i40e_status err = 0;
2215
2216         ring->state = 0;
2217
2218         /* clear the context structure first */
2219         memset(&rx_ctx, 0, sizeof(rx_ctx));
2220
2221         ring->rx_buf_len = vsi->rx_buf_len;
2222         ring->rx_hdr_len = vsi->rx_hdr_len;
2223
2224         rx_ctx.dbuff = ring->rx_buf_len >> I40E_RXQ_CTX_DBUFF_SHIFT;
2225         rx_ctx.hbuff = ring->rx_hdr_len >> I40E_RXQ_CTX_HBUFF_SHIFT;
2226
2227         rx_ctx.base = (ring->dma / 128);
2228         rx_ctx.qlen = ring->count;
2229
2230         if (vsi->back->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED) {
2231                 set_ring_16byte_desc_enabled(ring);
2232                 rx_ctx.dsize = 0;
2233         } else {
2234                 rx_ctx.dsize = 1;
2235         }
2236
2237         rx_ctx.dtype = vsi->dtype;
2238         if (vsi->dtype) {
2239                 set_ring_ps_enabled(ring);
2240                 rx_ctx.hsplit_0 = I40E_RX_SPLIT_L2      |
2241                                   I40E_RX_SPLIT_IP      |
2242                                   I40E_RX_SPLIT_TCP_UDP |
2243                                   I40E_RX_SPLIT_SCTP;
2244         } else {
2245                 rx_ctx.hsplit_0 = 0;
2246         }
2247
2248         rx_ctx.rxmax = min_t(u16, vsi->max_frame,
2249                                   (chain_len * ring->rx_buf_len));
2250         rx_ctx.tphrdesc_ena = 1;
2251         rx_ctx.tphwdesc_ena = 1;
2252         rx_ctx.tphdata_ena = 1;
2253         rx_ctx.tphhead_ena = 1;
2254         if (hw->revision_id == 0)
2255                 rx_ctx.lrxqthresh = 0;
2256         else
2257                 rx_ctx.lrxqthresh = 2;
2258         rx_ctx.crcstrip = 1;
2259         rx_ctx.l2tsel = 1;
2260         rx_ctx.showiv = 1;
2261
2262         /* clear the context in the HMC */
2263         err = i40e_clear_lan_rx_queue_context(hw, pf_q);
2264         if (err) {
2265                 dev_info(&vsi->back->pdev->dev,
2266                          "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2267                          ring->queue_index, pf_q, err);
2268                 return -ENOMEM;
2269         }
2270
2271         /* set the context in the HMC */
2272         err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
2273         if (err) {
2274                 dev_info(&vsi->back->pdev->dev,
2275                          "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2276                          ring->queue_index, pf_q, err);
2277                 return -ENOMEM;
2278         }
2279
2280         /* cache tail for quicker writes, and clear the reg before use */
2281         ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
2282         writel(0, ring->tail);
2283
2284         i40e_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
2285
2286         return 0;
2287 }
2288
2289 /**
2290  * i40e_vsi_configure_tx - Configure the VSI for Tx
2291  * @vsi: VSI structure describing this set of rings and resources
2292  *
2293  * Configure the Tx VSI for operation.
2294  **/
2295 static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
2296 {
2297         int err = 0;
2298         u16 i;
2299
2300         for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
2301                 err = i40e_configure_tx_ring(vsi->tx_rings[i]);
2302
2303         return err;
2304 }
2305
2306 /**
2307  * i40e_vsi_configure_rx - Configure the VSI for Rx
2308  * @vsi: the VSI being configured
2309  *
2310  * Configure the Rx VSI for operation.
2311  **/
2312 static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
2313 {
2314         int err = 0;
2315         u16 i;
2316
2317         if (vsi->netdev && (vsi->netdev->mtu > ETH_DATA_LEN))
2318                 vsi->max_frame = vsi->netdev->mtu + ETH_HLEN
2319                                + ETH_FCS_LEN + VLAN_HLEN;
2320         else
2321                 vsi->max_frame = I40E_RXBUFFER_2048;
2322
2323         /* figure out correct receive buffer length */
2324         switch (vsi->back->flags & (I40E_FLAG_RX_1BUF_ENABLED |
2325                                     I40E_FLAG_RX_PS_ENABLED)) {
2326         case I40E_FLAG_RX_1BUF_ENABLED:
2327                 vsi->rx_hdr_len = 0;
2328                 vsi->rx_buf_len = vsi->max_frame;
2329                 vsi->dtype = I40E_RX_DTYPE_NO_SPLIT;
2330                 break;
2331         case I40E_FLAG_RX_PS_ENABLED:
2332                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2333                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2334                 vsi->dtype = I40E_RX_DTYPE_HEADER_SPLIT;
2335                 break;
2336         default:
2337                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2338                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2339                 vsi->dtype = I40E_RX_DTYPE_SPLIT_ALWAYS;
2340                 break;
2341         }
2342
2343         /* round up for the chip's needs */
2344         vsi->rx_hdr_len = ALIGN(vsi->rx_hdr_len,
2345                                 (1 << I40E_RXQ_CTX_HBUFF_SHIFT));
2346         vsi->rx_buf_len = ALIGN(vsi->rx_buf_len,
2347                                 (1 << I40E_RXQ_CTX_DBUFF_SHIFT));
2348
2349         /* set up individual rings */
2350         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2351                 err = i40e_configure_rx_ring(vsi->rx_rings[i]);
2352
2353         return err;
2354 }
2355
2356 /**
2357  * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
2358  * @vsi: ptr to the VSI
2359  **/
2360 static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
2361 {
2362         u16 qoffset, qcount;
2363         int i, n;
2364
2365         if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED))
2366                 return;
2367
2368         for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
2369                 if (!(vsi->tc_config.enabled_tc & (1 << n)))
2370                         continue;
2371
2372                 qoffset = vsi->tc_config.tc_info[n].qoffset;
2373                 qcount = vsi->tc_config.tc_info[n].qcount;
2374                 for (i = qoffset; i < (qoffset + qcount); i++) {
2375                         struct i40e_ring *rx_ring = vsi->rx_rings[i];
2376                         struct i40e_ring *tx_ring = vsi->tx_rings[i];
2377                         rx_ring->dcb_tc = n;
2378                         tx_ring->dcb_tc = n;
2379                 }
2380         }
2381 }
2382
2383 /**
2384  * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
2385  * @vsi: ptr to the VSI
2386  **/
2387 static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
2388 {
2389         if (vsi->netdev)
2390                 i40e_set_rx_mode(vsi->netdev);
2391 }
2392
2393 /**
2394  * i40e_vsi_configure - Set up the VSI for action
2395  * @vsi: the VSI being configured
2396  **/
2397 static int i40e_vsi_configure(struct i40e_vsi *vsi)
2398 {
2399         int err;
2400
2401         i40e_set_vsi_rx_mode(vsi);
2402         i40e_restore_vlan(vsi);
2403         i40e_vsi_config_dcb_rings(vsi);
2404         err = i40e_vsi_configure_tx(vsi);
2405         if (!err)
2406                 err = i40e_vsi_configure_rx(vsi);
2407
2408         return err;
2409 }
2410
2411 /**
2412  * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
2413  * @vsi: the VSI being configured
2414  **/
2415 static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
2416 {
2417         struct i40e_pf *pf = vsi->back;
2418         struct i40e_q_vector *q_vector;
2419         struct i40e_hw *hw = &pf->hw;
2420         u16 vector;
2421         int i, q;
2422         u32 val;
2423         u32 qp;
2424
2425         /* The interrupt indexing is offset by 1 in the PFINT_ITRn
2426          * and PFINT_LNKLSTn registers, e.g.:
2427          *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
2428          */
2429         qp = vsi->base_queue;
2430         vector = vsi->base_vector;
2431         for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
2432                 q_vector = vsi->q_vectors[i];
2433                 q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2434                 q_vector->rx.latency_range = I40E_LOW_LATENCY;
2435                 wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
2436                      q_vector->rx.itr);
2437                 q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2438                 q_vector->tx.latency_range = I40E_LOW_LATENCY;
2439                 wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
2440                      q_vector->tx.itr);
2441
2442                 /* Linked list for the queuepairs assigned to this vector */
2443                 wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
2444                 for (q = 0; q < q_vector->num_ringpairs; q++) {
2445                         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
2446                               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT)  |
2447                               (vector      << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
2448                               (qp          << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT)|
2449                               (I40E_QUEUE_TYPE_TX
2450                                       << I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);
2451
2452                         wr32(hw, I40E_QINT_RQCTL(qp), val);
2453
2454                         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
2455                               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT)  |
2456                               (vector      << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
2457                               ((qp+1)      << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT)|
2458                               (I40E_QUEUE_TYPE_RX
2459                                       << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2460
2461                         /* Terminate the linked list */
2462                         if (q == (q_vector->num_ringpairs - 1))
2463                                 val |= (I40E_QUEUE_END_OF_LIST
2464                                            << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2465
2466                         wr32(hw, I40E_QINT_TQCTL(qp), val);
2467                         qp++;
2468                 }
2469         }
2470
2471         i40e_flush(hw);
2472 }
2473
2474 /**
2475  * i40e_enable_misc_int_causes - enable the non-queue interrupts
2476  * @hw: ptr to the hardware info
2477  **/
2478 static void i40e_enable_misc_int_causes(struct i40e_hw *hw)
2479 {
2480         u32 val;
2481
2482         /* clear things first */
2483         wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
2484         rd32(hw, I40E_PFINT_ICR0);         /* read to clear */
2485
2486         val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
2487               I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
2488               I40E_PFINT_ICR0_ENA_GRST_MASK          |
2489               I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
2490               I40E_PFINT_ICR0_ENA_GPIO_MASK          |
2491               I40E_PFINT_ICR0_ENA_STORM_DETECT_MASK  |
2492               I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
2493               I40E_PFINT_ICR0_ENA_VFLR_MASK          |
2494               I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2495
2496         wr32(hw, I40E_PFINT_ICR0_ENA, val);
2497
2498         /* SW_ITR_IDX = 0, but don't change INTENA */
2499         wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTL0_SW_ITR_INDX_MASK |
2500                                         I40E_PFINT_DYN_CTL0_INTENA_MSK_MASK);
2501
2502         /* OTHER_ITR_IDX = 0 */
2503         wr32(hw, I40E_PFINT_STAT_CTL0, 0);
2504 }
2505
2506 /**
2507  * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
2508  * @vsi: the VSI being configured
2509  **/
2510 static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
2511 {
2512         struct i40e_q_vector *q_vector = vsi->q_vectors[0];
2513         struct i40e_pf *pf = vsi->back;
2514         struct i40e_hw *hw = &pf->hw;
2515         u32 val;
2516
2517         /* set the ITR configuration */
2518         q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2519         q_vector->rx.latency_range = I40E_LOW_LATENCY;
2520         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.itr);
2521         q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2522         q_vector->tx.latency_range = I40E_LOW_LATENCY;
2523         wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.itr);
2524
2525         i40e_enable_misc_int_causes(hw);
2526
2527         /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
2528         wr32(hw, I40E_PFINT_LNKLST0, 0);
2529
2530         /* Associate the queue pair to the vector and enable the q int */
2531         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK                  |
2532               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
2533               (I40E_QUEUE_TYPE_TX << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2534
2535         wr32(hw, I40E_QINT_RQCTL(0), val);
2536
2537         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                  |
2538               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
2539               (I40E_QUEUE_END_OF_LIST << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2540
2541         wr32(hw, I40E_QINT_TQCTL(0), val);
2542         i40e_flush(hw);
2543 }
2544
2545 /**
2546  * i40e_irq_dynamic_disable_icr0 - Disable default interrupt generation for icr0
2547  * @pf: board private structure
2548  **/
2549 void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf)
2550 {
2551         struct i40e_hw *hw = &pf->hw;
2552
2553         wr32(hw, I40E_PFINT_DYN_CTL0,
2554              I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
2555         i40e_flush(hw);
2556 }
2557
2558 /**
2559  * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
2560  * @pf: board private structure
2561  **/
2562 void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf)
2563 {
2564         struct i40e_hw *hw = &pf->hw;
2565         u32 val;
2566
2567         val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
2568               I40E_PFINT_DYN_CTL0_CLEARPBA_MASK |
2569               (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);
2570
2571         wr32(hw, I40E_PFINT_DYN_CTL0, val);
2572         i40e_flush(hw);
2573 }
2574
2575 /**
2576  * i40e_irq_dynamic_enable - Enable default interrupt generation settings
2577  * @vsi: pointer to a vsi
2578  * @vector: enable a particular Hw Interrupt vector
2579  **/
2580 void i40e_irq_dynamic_enable(struct i40e_vsi *vsi, int vector)
2581 {
2582         struct i40e_pf *pf = vsi->back;
2583         struct i40e_hw *hw = &pf->hw;
2584         u32 val;
2585
2586         val = I40E_PFINT_DYN_CTLN_INTENA_MASK |
2587               I40E_PFINT_DYN_CTLN_CLEARPBA_MASK |
2588               (I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
2589         wr32(hw, I40E_PFINT_DYN_CTLN(vector - 1), val);
2590         /* skip the flush */
2591 }
2592
2593 /**
2594  * i40e_msix_clean_rings - MSIX mode Interrupt Handler
2595  * @irq: interrupt number
2596  * @data: pointer to a q_vector
2597  **/
2598 static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
2599 {
2600         struct i40e_q_vector *q_vector = data;
2601
2602         if (!q_vector->tx.ring && !q_vector->rx.ring)
2603                 return IRQ_HANDLED;
2604
2605         napi_schedule(&q_vector->napi);
2606
2607         return IRQ_HANDLED;
2608 }
2609
2610 /**
2611  * i40e_fdir_clean_rings - Interrupt Handler for FDIR rings
2612  * @irq: interrupt number
2613  * @data: pointer to a q_vector
2614  **/
2615 static irqreturn_t i40e_fdir_clean_rings(int irq, void *data)
2616 {
2617         struct i40e_q_vector *q_vector = data;
2618
2619         if (!q_vector->tx.ring && !q_vector->rx.ring)
2620                 return IRQ_HANDLED;
2621
2622         pr_info("fdir ring cleaning needed\n");
2623
2624         return IRQ_HANDLED;
2625 }
2626
2627 /**
2628  * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
2629  * @vsi: the VSI being configured
2630  * @basename: name for the vector
2631  *
2632  * Allocates MSI-X vectors and requests interrupts from the kernel.
2633  **/
2634 static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
2635 {
2636         int q_vectors = vsi->num_q_vectors;
2637         struct i40e_pf *pf = vsi->back;
2638         int base = vsi->base_vector;
2639         int rx_int_idx = 0;
2640         int tx_int_idx = 0;
2641         int vector, err;
2642
2643         for (vector = 0; vector < q_vectors; vector++) {
2644                 struct i40e_q_vector *q_vector = vsi->q_vectors[vector];
2645
2646                 if (q_vector->tx.ring && q_vector->rx.ring) {
2647                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2648                                  "%s-%s-%d", basename, "TxRx", rx_int_idx++);
2649                         tx_int_idx++;
2650                 } else if (q_vector->rx.ring) {
2651                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2652                                  "%s-%s-%d", basename, "rx", rx_int_idx++);
2653                 } else if (q_vector->tx.ring) {
2654                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2655                                  "%s-%s-%d", basename, "tx", tx_int_idx++);
2656                 } else {
2657                         /* skip this unused q_vector */
2658                         continue;
2659                 }
2660                 err = request_irq(pf->msix_entries[base + vector].vector,
2661                                   vsi->irq_handler,
2662                                   0,
2663                                   q_vector->name,
2664                                   q_vector);
2665                 if (err) {
2666                         dev_info(&pf->pdev->dev,
2667                                  "%s: request_irq failed, error: %d\n",
2668                                  __func__, err);
2669                         goto free_queue_irqs;
2670                 }
2671                 /* assign the mask for this irq */
2672                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2673                                       &q_vector->affinity_mask);
2674         }
2675
2676         return 0;
2677
2678 free_queue_irqs:
2679         while (vector) {
2680                 vector--;
2681                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2682                                       NULL);
2683                 free_irq(pf->msix_entries[base + vector].vector,
2684                          &(vsi->q_vectors[vector]));
2685         }
2686         return err;
2687 }
2688
2689 /**
2690  * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
2691  * @vsi: the VSI being un-configured
2692  **/
2693 static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
2694 {
2695         struct i40e_pf *pf = vsi->back;
2696         struct i40e_hw *hw = &pf->hw;
2697         int base = vsi->base_vector;
2698         int i;
2699
2700         for (i = 0; i < vsi->num_queue_pairs; i++) {
2701                 wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), 0);
2702                 wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), 0);
2703         }
2704
2705         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2706                 for (i = vsi->base_vector;
2707                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2708                         wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);
2709
2710                 i40e_flush(hw);
2711                 for (i = 0; i < vsi->num_q_vectors; i++)
2712                         synchronize_irq(pf->msix_entries[i + base].vector);
2713         } else {
2714                 /* Legacy and MSI mode - this stops all interrupt handling */
2715                 wr32(hw, I40E_PFINT_ICR0_ENA, 0);
2716                 wr32(hw, I40E_PFINT_DYN_CTL0, 0);
2717                 i40e_flush(hw);
2718                 synchronize_irq(pf->pdev->irq);
2719         }
2720 }
2721
2722 /**
2723  * i40e_vsi_enable_irq - Enable IRQ for the given VSI
2724  * @vsi: the VSI being configured
2725  **/
2726 static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
2727 {
2728         struct i40e_pf *pf = vsi->back;
2729         int i;
2730
2731         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2732                 for (i = vsi->base_vector;
2733                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2734                         i40e_irq_dynamic_enable(vsi, i);
2735         } else {
2736                 i40e_irq_dynamic_enable_icr0(pf);
2737         }
2738
2739         i40e_flush(&pf->hw);
2740         return 0;
2741 }
2742
2743 /**
2744  * i40e_stop_misc_vector - Stop the vector that handles non-queue events
2745  * @pf: board private structure
2746  **/
2747 static void i40e_stop_misc_vector(struct i40e_pf *pf)
2748 {
2749         /* Disable ICR 0 */
2750         wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
2751         i40e_flush(&pf->hw);
2752 }
2753
2754 /**
2755  * i40e_intr - MSI/Legacy and non-queue interrupt handler
2756  * @irq: interrupt number
2757  * @data: pointer to a q_vector
2758  *
2759  * This is the handler used for all MSI/Legacy interrupts, and deals
2760  * with both queue and non-queue interrupts.  This is also used in
2761  * MSIX mode to handle the non-queue interrupts.
2762  **/
2763 static irqreturn_t i40e_intr(int irq, void *data)
2764 {
2765         struct i40e_pf *pf = (struct i40e_pf *)data;
2766         struct i40e_hw *hw = &pf->hw;
2767         irqreturn_t ret = IRQ_NONE;
2768         u32 icr0, icr0_remaining;
2769         u32 val, ena_mask;
2770
2771         icr0 = rd32(hw, I40E_PFINT_ICR0);
2772         ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);
2773
2774         /* if sharing a legacy IRQ, we might get called w/o an intr pending */
2775         if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
2776                 goto enable_intr;
2777
2778         /* if interrupt but no bits showing, must be SWINT */
2779         if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) ||
2780             (icr0 & I40E_PFINT_ICR0_SWINT_MASK))
2781                 pf->sw_int_count++;
2782
2783         /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
2784         if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
2785
2786                 /* temporarily disable queue cause for NAPI processing */
2787                 u32 qval = rd32(hw, I40E_QINT_RQCTL(0));
2788                 qval &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
2789                 wr32(hw, I40E_QINT_RQCTL(0), qval);
2790
2791                 qval = rd32(hw, I40E_QINT_TQCTL(0));
2792                 qval &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
2793                 wr32(hw, I40E_QINT_TQCTL(0), qval);
2794
2795                 if (!test_bit(__I40E_DOWN, &pf->state))
2796                         napi_schedule(&pf->vsi[pf->lan_vsi]->q_vectors[0]->napi);
2797         }
2798
2799         if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
2800                 ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2801                 set_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
2802         }
2803
2804         if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
2805                 ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
2806                 set_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
2807         }
2808
2809         if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
2810                 ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
2811                 set_bit(__I40E_VFLR_EVENT_PENDING, &pf->state);
2812         }
2813
2814         if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
2815                 if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
2816                         set_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
2817                 ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
2818                 val = rd32(hw, I40E_GLGEN_RSTAT);
2819                 val = (val & I40E_GLGEN_RSTAT_RESET_TYPE_MASK)
2820                        >> I40E_GLGEN_RSTAT_RESET_TYPE_SHIFT;
2821                 if (val == I40E_RESET_CORER)
2822                         pf->corer_count++;
2823                 else if (val == I40E_RESET_GLOBR)
2824                         pf->globr_count++;
2825                 else if (val == I40E_RESET_EMPR)
2826                         pf->empr_count++;
2827         }
2828
2829         if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
2830                 icr0 &= ~I40E_PFINT_ICR0_HMC_ERR_MASK;
2831                 dev_info(&pf->pdev->dev, "HMC error interrupt\n");
2832         }
2833
2834         /* If a critical error is pending we have no choice but to reset the
2835          * device.
2836          * Report and mask out any remaining unexpected interrupts.
2837          */
2838         icr0_remaining = icr0 & ena_mask;
2839         if (icr0_remaining) {
2840                 dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
2841                          icr0_remaining);
2842                 if ((icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
2843                     (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
2844                     (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK) ||
2845                     (icr0_remaining & I40E_PFINT_ICR0_MAL_DETECT_MASK)) {
2846                         dev_info(&pf->pdev->dev, "device will be reset\n");
2847                         set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
2848                         i40e_service_event_schedule(pf);
2849                 }
2850                 ena_mask &= ~icr0_remaining;
2851         }
2852         ret = IRQ_HANDLED;
2853
2854 enable_intr:
2855         /* re-enable interrupt causes */
2856         wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
2857         if (!test_bit(__I40E_DOWN, &pf->state)) {
2858                 i40e_service_event_schedule(pf);
2859                 i40e_irq_dynamic_enable_icr0(pf);
2860         }
2861
2862         return ret;
2863 }
2864
2865 /**
2866  * i40e_map_vector_to_qp - Assigns the queue pair to the vector
2867  * @vsi: the VSI being configured
2868  * @v_idx: vector index
2869  * @qp_idx: queue pair index
2870  **/
2871 static void map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
2872 {
2873         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
2874         struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
2875         struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];
2876
2877         tx_ring->q_vector = q_vector;
2878         tx_ring->next = q_vector->tx.ring;
2879         q_vector->tx.ring = tx_ring;
2880         q_vector->tx.count++;
2881
2882         rx_ring->q_vector = q_vector;
2883         rx_ring->next = q_vector->rx.ring;
2884         q_vector->rx.ring = rx_ring;
2885         q_vector->rx.count++;
2886 }
2887
2888 /**
2889  * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
2890  * @vsi: the VSI being configured
2891  *
2892  * This function maps descriptor rings to the queue-specific vectors
2893  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
2894  * one vector per queue pair, but on a constrained vector budget, we
2895  * group the queue pairs as "efficiently" as possible.
2896  **/
2897 static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
2898 {
2899         int qp_remaining = vsi->num_queue_pairs;
2900         int q_vectors = vsi->num_q_vectors;
2901         int num_ringpairs;
2902         int v_start = 0;
2903         int qp_idx = 0;
2904
2905         /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
2906          * group them so there are multiple queues per vector.
2907          */
2908         for (; v_start < q_vectors && qp_remaining; v_start++) {
2909                 struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];
2910
2911                 num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);
2912
2913                 q_vector->num_ringpairs = num_ringpairs;
2914
2915                 q_vector->rx.count = 0;
2916                 q_vector->tx.count = 0;
2917                 q_vector->rx.ring = NULL;
2918                 q_vector->tx.ring = NULL;
2919
2920                 while (num_ringpairs--) {
2921                         map_vector_to_qp(vsi, v_start, qp_idx);
2922                         qp_idx++;
2923                         qp_remaining--;
2924                 }
2925         }
2926 }
2927
2928 /**
2929  * i40e_vsi_request_irq - Request IRQ from the OS
2930  * @vsi: the VSI being configured
2931  * @basename: name for the vector
2932  **/
2933 static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
2934 {
2935         struct i40e_pf *pf = vsi->back;
2936         int err;
2937
2938         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
2939                 err = i40e_vsi_request_irq_msix(vsi, basename);
2940         else if (pf->flags & I40E_FLAG_MSI_ENABLED)
2941                 err = request_irq(pf->pdev->irq, i40e_intr, 0,
2942                                   pf->misc_int_name, pf);
2943         else
2944                 err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
2945                                   pf->misc_int_name, pf);
2946
2947         if (err)
2948                 dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);
2949
2950         return err;
2951 }
2952
2953 #ifdef CONFIG_NET_POLL_CONTROLLER
2954 /**
2955  * i40e_netpoll - A Polling 'interrupt'handler
2956  * @netdev: network interface device structure
2957  *
2958  * This is used by netconsole to send skbs without having to re-enable
2959  * interrupts.  It's not called while the normal interrupt routine is executing.
2960  **/
2961 static void i40e_netpoll(struct net_device *netdev)
2962 {
2963         struct i40e_netdev_priv *np = netdev_priv(netdev);
2964         struct i40e_vsi *vsi = np->vsi;
2965         struct i40e_pf *pf = vsi->back;
2966         int i;
2967
2968         /* if interface is down do nothing */
2969         if (test_bit(__I40E_DOWN, &vsi->state))
2970                 return;
2971
2972         pf->flags |= I40E_FLAG_IN_NETPOLL;
2973         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2974                 for (i = 0; i < vsi->num_q_vectors; i++)
2975                         i40e_msix_clean_rings(0, vsi->q_vectors[i]);
2976         } else {
2977                 i40e_intr(pf->pdev->irq, netdev);
2978         }
2979         pf->flags &= ~I40E_FLAG_IN_NETPOLL;
2980 }
2981 #endif
2982
2983 /**
2984  * i40e_vsi_control_tx - Start or stop a VSI's rings
2985  * @vsi: the VSI being configured
2986  * @enable: start or stop the rings
2987  **/
2988 static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
2989 {
2990         struct i40e_pf *pf = vsi->back;
2991         struct i40e_hw *hw = &pf->hw;
2992         int i, j, pf_q;
2993         u32 tx_reg;
2994
2995         pf_q = vsi->base_queue;
2996         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
2997                 j = 1000;
2998                 do {
2999                         usleep_range(1000, 2000);
3000                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3001                 } while (j-- && ((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT)
3002                                ^ (tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT)) & 1);
3003
3004                 /* Skip if the queue is already in the requested state */
3005                 if (enable && (tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3006                         continue;
3007                 if (!enable && !(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3008                         continue;
3009
3010                 /* turn on/off the queue */
3011                 if (enable)
3012                         tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK |
3013                                   I40E_QTX_ENA_QENA_STAT_MASK;
3014                 else
3015                         tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
3016
3017                 wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
3018
3019                 /* wait for the change to finish */
3020                 for (j = 0; j < 10; j++) {
3021                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3022                         if (enable) {
3023                                 if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3024                                         break;
3025                         } else {
3026                                 if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3027                                         break;
3028                         }
3029
3030                         udelay(10);
3031                 }
3032                 if (j >= 10) {
3033                         dev_info(&pf->pdev->dev, "Tx ring %d %sable timeout\n",
3034                                  pf_q, (enable ? "en" : "dis"));
3035                         return -ETIMEDOUT;
3036                 }
3037         }
3038
3039         if (hw->revision_id == 0)
3040                 mdelay(50);
3041
3042         return 0;
3043 }
3044
3045 /**
3046  * i40e_vsi_control_rx - Start or stop a VSI's rings
3047  * @vsi: the VSI being configured
3048  * @enable: start or stop the rings
3049  **/
3050 static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
3051 {
3052         struct i40e_pf *pf = vsi->back;
3053         struct i40e_hw *hw = &pf->hw;
3054         int i, j, pf_q;
3055         u32 rx_reg;
3056
3057         pf_q = vsi->base_queue;
3058         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3059                 j = 1000;
3060                 do {
3061                         usleep_range(1000, 2000);
3062                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3063                 } while (j-- && ((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT)
3064                                ^ (rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT)) & 1);
3065
3066                 if (enable) {
3067                         /* is STAT set ? */
3068                         if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3069                                 continue;
3070                 } else {
3071                         /* is !STAT set ? */
3072                         if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3073                                 continue;
3074                 }
3075
3076                 /* turn on/off the queue */
3077                 if (enable)
3078                         rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK |
3079                                   I40E_QRX_ENA_QENA_STAT_MASK;
3080                 else
3081                         rx_reg &= ~(I40E_QRX_ENA_QENA_REQ_MASK |
3082                                   I40E_QRX_ENA_QENA_STAT_MASK);
3083                 wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
3084
3085                 /* wait for the change to finish */
3086                 for (j = 0; j < 10; j++) {
3087                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3088
3089                         if (enable) {
3090                                 if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3091                                         break;
3092                         } else {
3093                                 if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3094                                         break;
3095                         }
3096
3097                         udelay(10);
3098                 }
3099                 if (j >= 10) {
3100                         dev_info(&pf->pdev->dev, "Rx ring %d %sable timeout\n",
3101                                  pf_q, (enable ? "en" : "dis"));
3102                         return -ETIMEDOUT;
3103                 }
3104         }
3105
3106         return 0;
3107 }
3108
3109 /**
3110  * i40e_vsi_control_rings - Start or stop a VSI's rings
3111  * @vsi: the VSI being configured
3112  * @enable: start or stop the rings
3113  **/
3114 int i40e_vsi_control_rings(struct i40e_vsi *vsi, bool request)
3115 {
3116         int ret;
3117
3118         /* do rx first for enable and last for disable */
3119         if (request) {
3120                 ret = i40e_vsi_control_rx(vsi, request);
3121                 if (ret)
3122                         return ret;
3123                 ret = i40e_vsi_control_tx(vsi, request);
3124         } else {
3125                 ret = i40e_vsi_control_tx(vsi, request);
3126                 if (ret)
3127                         return ret;
3128                 ret = i40e_vsi_control_rx(vsi, request);
3129         }
3130
3131         return ret;
3132 }
3133
3134 /**
3135  * i40e_vsi_free_irq - Free the irq association with the OS
3136  * @vsi: the VSI being configured
3137  **/
3138 static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
3139 {
3140         struct i40e_pf *pf = vsi->back;
3141         struct i40e_hw *hw = &pf->hw;
3142         int base = vsi->base_vector;
3143         u32 val, qp;
3144         int i;
3145
3146         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3147                 if (!vsi->q_vectors)
3148                         return;
3149
3150                 for (i = 0; i < vsi->num_q_vectors; i++) {
3151                         u16 vector = i + base;
3152
3153                         /* free only the irqs that were actually requested */
3154                         if (!vsi->q_vectors[i] ||
3155                             !vsi->q_vectors[i]->num_ringpairs)
3156                                 continue;
3157
3158                         /* clear the affinity_mask in the IRQ descriptor */
3159                         irq_set_affinity_hint(pf->msix_entries[vector].vector,
3160                                               NULL);
3161                         free_irq(pf->msix_entries[vector].vector,
3162                                  vsi->q_vectors[i]);
3163
3164                         /* Tear down the interrupt queue link list
3165                          *
3166                          * We know that they come in pairs and always
3167                          * the Rx first, then the Tx.  To clear the
3168                          * link list, stick the EOL value into the
3169                          * next_q field of the registers.
3170                          */
3171                         val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
3172                         qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3173                                 >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3174                         val |= I40E_QUEUE_END_OF_LIST
3175                                 << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3176                         wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);
3177
3178                         while (qp != I40E_QUEUE_END_OF_LIST) {
3179                                 u32 next;
3180
3181                                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3182
3183                                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3184                                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3185                                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3186                                          I40E_QINT_RQCTL_INTEVENT_MASK);
3187
3188                                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3189                                          I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3190
3191                                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3192
3193                                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3194
3195                                 next = (val & I40E_QINT_TQCTL_NEXTQ_INDX_MASK)
3196                                         >> I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT;
3197
3198                                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3199                                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3200                                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3201                                          I40E_QINT_TQCTL_INTEVENT_MASK);
3202
3203                                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3204                                          I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3205
3206                                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3207                                 qp = next;
3208                         }
3209                 }
3210         } else {
3211                 free_irq(pf->pdev->irq, pf);
3212
3213                 val = rd32(hw, I40E_PFINT_LNKLST0);
3214                 qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3215                         >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3216                 val |= I40E_QUEUE_END_OF_LIST
3217                         << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
3218                 wr32(hw, I40E_PFINT_LNKLST0, val);
3219
3220                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3221                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3222                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3223                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3224                          I40E_QINT_RQCTL_INTEVENT_MASK);
3225
3226                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3227                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3228
3229                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3230
3231                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3232
3233                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3234                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3235                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3236                          I40E_QINT_TQCTL_INTEVENT_MASK);
3237
3238                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3239                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3240
3241                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3242         }
3243 }
3244
3245 /**
3246  * i40e_free_q_vector - Free memory allocated for specific interrupt vector
3247  * @vsi: the VSI being configured
3248  * @v_idx: Index of vector to be freed
3249  *
3250  * This function frees the memory allocated to the q_vector.  In addition if
3251  * NAPI is enabled it will delete any references to the NAPI struct prior
3252  * to freeing the q_vector.
3253  **/
3254 static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
3255 {
3256         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3257         struct i40e_ring *ring;
3258
3259         if (!q_vector)
3260                 return;
3261
3262         /* disassociate q_vector from rings */
3263         i40e_for_each_ring(ring, q_vector->tx)
3264                 ring->q_vector = NULL;
3265
3266         i40e_for_each_ring(ring, q_vector->rx)
3267                 ring->q_vector = NULL;
3268
3269         /* only VSI w/ an associated netdev is set up w/ NAPI */
3270         if (vsi->netdev)
3271                 netif_napi_del(&q_vector->napi);
3272
3273         vsi->q_vectors[v_idx] = NULL;
3274
3275         kfree_rcu(q_vector, rcu);
3276 }
3277
3278 /**
3279  * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
3280  * @vsi: the VSI being un-configured
3281  *
3282  * This frees the memory allocated to the q_vectors and
3283  * deletes references to the NAPI struct.
3284  **/
3285 static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
3286 {
3287         int v_idx;
3288
3289         for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
3290                 i40e_free_q_vector(vsi, v_idx);
3291 }
3292
3293 /**
3294  * i40e_reset_interrupt_capability - Disable interrupt setup in OS
3295  * @pf: board private structure
3296  **/
3297 static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
3298 {
3299         /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
3300         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3301                 pci_disable_msix(pf->pdev);
3302                 kfree(pf->msix_entries);
3303                 pf->msix_entries = NULL;
3304         } else if (pf->flags & I40E_FLAG_MSI_ENABLED) {
3305                 pci_disable_msi(pf->pdev);
3306         }
3307         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED);
3308 }
3309
3310 /**
3311  * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
3312  * @pf: board private structure
3313  *
3314  * We go through and clear interrupt specific resources and reset the structure
3315  * to pre-load conditions
3316  **/
3317 static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
3318 {
3319         int i;
3320
3321         i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);
3322         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
3323                 if (pf->vsi[i])
3324                         i40e_vsi_free_q_vectors(pf->vsi[i]);
3325         i40e_reset_interrupt_capability(pf);
3326 }
3327
3328 /**
3329  * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
3330  * @vsi: the VSI being configured
3331  **/
3332 static void i40e_napi_enable_all(struct i40e_vsi *vsi)
3333 {
3334         int q_idx;
3335
3336         if (!vsi->netdev)
3337                 return;
3338
3339         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3340                 napi_enable(&vsi->q_vectors[q_idx]->napi);
3341 }
3342
3343 /**
3344  * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
3345  * @vsi: the VSI being configured
3346  **/
3347 static void i40e_napi_disable_all(struct i40e_vsi *vsi)
3348 {
3349         int q_idx;
3350
3351         if (!vsi->netdev)
3352                 return;
3353
3354         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3355                 napi_disable(&vsi->q_vectors[q_idx]->napi);
3356 }
3357
3358 /**
3359  * i40e_quiesce_vsi - Pause a given VSI
3360  * @vsi: the VSI being paused
3361  **/
3362 static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
3363 {
3364         if (test_bit(__I40E_DOWN, &vsi->state))
3365                 return;
3366
3367         set_bit(__I40E_NEEDS_RESTART, &vsi->state);
3368         if (vsi->netdev && netif_running(vsi->netdev)) {
3369                 vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
3370         } else {
3371                 set_bit(__I40E_DOWN, &vsi->state);
3372                 i40e_down(vsi);
3373         }
3374 }
3375
3376 /**
3377  * i40e_unquiesce_vsi - Resume a given VSI
3378  * @vsi: the VSI being resumed
3379  **/
3380 static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
3381 {
3382         if (!test_bit(__I40E_NEEDS_RESTART, &vsi->state))
3383                 return;
3384
3385         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
3386         if (vsi->netdev && netif_running(vsi->netdev))
3387                 vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
3388         else
3389                 i40e_up(vsi);   /* this clears the DOWN bit */
3390 }
3391
3392 /**
3393  * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
3394  * @pf: the PF
3395  **/
3396 static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
3397 {
3398         int v;
3399
3400         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3401                 if (pf->vsi[v])
3402                         i40e_quiesce_vsi(pf->vsi[v]);
3403         }
3404 }
3405
3406 /**
3407  * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
3408  * @pf: the PF
3409  **/
3410 static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
3411 {
3412         int v;
3413
3414         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3415                 if (pf->vsi[v])
3416                         i40e_unquiesce_vsi(pf->vsi[v]);
3417         }
3418 }
3419
3420 /**
3421  * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
3422  * @dcbcfg: the corresponding DCBx configuration structure
3423  *
3424  * Return the number of TCs from given DCBx configuration
3425  **/
3426 static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
3427 {
3428         u8 num_tc = 0;
3429         int i;
3430
3431         /* Scan the ETS Config Priority Table to find
3432          * traffic class enabled for a given priority
3433          * and use the traffic class index to get the
3434          * number of traffic classes enabled
3435          */
3436         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3437                 if (dcbcfg->etscfg.prioritytable[i] > num_tc)
3438                         num_tc = dcbcfg->etscfg.prioritytable[i];
3439         }
3440
3441         /* Traffic class index starts from zero so
3442          * increment to return the actual count
3443          */
3444         return num_tc + 1;
3445 }
3446
3447 /**
3448  * i40e_dcb_get_enabled_tc - Get enabled traffic classes
3449  * @dcbcfg: the corresponding DCBx configuration structure
3450  *
3451  * Query the current DCB configuration and return the number of
3452  * traffic classes enabled from the given DCBX config
3453  **/
3454 static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
3455 {
3456         u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
3457         u8 enabled_tc = 1;
3458         u8 i;
3459
3460         for (i = 0; i < num_tc; i++)
3461                 enabled_tc |= 1 << i;
3462
3463         return enabled_tc;
3464 }
3465
3466 /**
3467  * i40e_pf_get_num_tc - Get enabled traffic classes for PF
3468  * @pf: PF being queried
3469  *
3470  * Return number of traffic classes enabled for the given PF
3471  **/
3472 static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
3473 {
3474         struct i40e_hw *hw = &pf->hw;
3475         u8 i, enabled_tc;
3476         u8 num_tc = 0;
3477         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3478
3479         /* If DCB is not enabled then always in single TC */
3480         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3481                 return 1;
3482
3483         /* MFP mode return count of enabled TCs for this PF */
3484         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
3485                 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3486                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3487                         if (enabled_tc & (1 << i))
3488                                 num_tc++;
3489                 }
3490                 return num_tc;
3491         }
3492
3493         /* SFP mode will be enabled for all TCs on port */
3494         return i40e_dcb_get_num_tc(dcbcfg);
3495 }
3496
3497 /**
3498  * i40e_pf_get_default_tc - Get bitmap for first enabled TC
3499  * @pf: PF being queried
3500  *
3501  * Return a bitmap for first enabled traffic class for this PF.
3502  **/
3503 static u8 i40e_pf_get_default_tc(struct i40e_pf *pf)
3504 {
3505         u8 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3506         u8 i = 0;
3507
3508         if (!enabled_tc)
3509                 return 0x1; /* TC0 */
3510
3511         /* Find the first enabled TC */
3512         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3513                 if (enabled_tc & (1 << i))
3514                         break;
3515         }
3516
3517         return 1 << i;
3518 }
3519
3520 /**
3521  * i40e_pf_get_pf_tc_map - Get bitmap for enabled traffic classes
3522  * @pf: PF being queried
3523  *
3524  * Return a bitmap for enabled traffic classes for this PF.
3525  **/
3526 static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
3527 {
3528         /* If DCB is not enabled for this PF then just return default TC */
3529         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3530                 return i40e_pf_get_default_tc(pf);
3531
3532         /* MFP mode will have enabled TCs set by FW */
3533         if (pf->flags & I40E_FLAG_MFP_ENABLED)
3534                 return pf->hw.func_caps.enabled_tcmap;
3535
3536         /* SFP mode we want PF to be enabled for all TCs */
3537         return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
3538 }
3539
3540 /**
3541  * i40e_vsi_get_bw_info - Query VSI BW Information
3542  * @vsi: the VSI being queried
3543  *
3544  * Returns 0 on success, negative value on failure
3545  **/
3546 static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
3547 {
3548         struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
3549         struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
3550         struct i40e_pf *pf = vsi->back;
3551         struct i40e_hw *hw = &pf->hw;
3552         i40e_status aq_ret;
3553         u32 tc_bw_max;
3554         int i;
3555
3556         /* Get the VSI level BW configuration */
3557         aq_ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
3558         if (aq_ret) {
3559                 dev_info(&pf->pdev->dev,
3560                          "couldn't get pf vsi bw config, err %d, aq_err %d\n",
3561                          aq_ret, pf->hw.aq.asq_last_status);
3562                 return -EINVAL;
3563         }
3564
3565         /* Get the VSI level BW configuration per TC */
3566         aq_ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
3567                                                   NULL);
3568         if (aq_ret) {
3569                 dev_info(&pf->pdev->dev,
3570                          "couldn't get pf vsi ets bw config, err %d, aq_err %d\n",
3571                          aq_ret, pf->hw.aq.asq_last_status);
3572                 return -EINVAL;
3573         }
3574
3575         if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
3576                 dev_info(&pf->pdev->dev,
3577                          "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
3578                          bw_config.tc_valid_bits,
3579                          bw_ets_config.tc_valid_bits);
3580                 /* Still continuing */
3581         }
3582
3583         vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
3584         vsi->bw_max_quanta = bw_config.max_bw;
3585         tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
3586                     (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
3587         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3588                 vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
3589                 vsi->bw_ets_limit_credits[i] =
3590                                         le16_to_cpu(bw_ets_config.credits[i]);
3591                 /* 3 bits out of 4 for each TC */
3592                 vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
3593         }
3594
3595         return 0;
3596 }
3597
3598 /**
3599  * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
3600  * @vsi: the VSI being configured
3601  * @enabled_tc: TC bitmap
3602  * @bw_credits: BW shared credits per TC
3603  *
3604  * Returns 0 on success, negative value on failure
3605  **/
3606 static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
3607                                        u8 *bw_share)
3608 {
3609         struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
3610         i40e_status aq_ret;
3611         int i;
3612
3613         bw_data.tc_valid_bits = enabled_tc;
3614         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3615                 bw_data.tc_bw_credits[i] = bw_share[i];
3616
3617         aq_ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, vsi->seid, &bw_data,
3618                                           NULL);
3619         if (aq_ret) {
3620                 dev_info(&vsi->back->pdev->dev,
3621                          "%s: AQ command Config VSI BW allocation per TC failed = %d\n",
3622                          __func__, vsi->back->hw.aq.asq_last_status);
3623                 return -EINVAL;
3624         }
3625
3626         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3627                 vsi->info.qs_handle[i] = bw_data.qs_handles[i];
3628
3629         return 0;
3630 }
3631
3632 /**
3633  * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
3634  * @vsi: the VSI being configured
3635  * @enabled_tc: TC map to be enabled
3636  *
3637  **/
3638 static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3639 {
3640         struct net_device *netdev = vsi->netdev;
3641         struct i40e_pf *pf = vsi->back;
3642         struct i40e_hw *hw = &pf->hw;
3643         u8 netdev_tc = 0;
3644         int i;
3645         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3646
3647         if (!netdev)
3648                 return;
3649
3650         if (!enabled_tc) {
3651                 netdev_reset_tc(netdev);
3652                 return;
3653         }
3654
3655         /* Set up actual enabled TCs on the VSI */
3656         if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
3657                 return;
3658
3659         /* set per TC queues for the VSI */
3660         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3661                 /* Only set TC queues for enabled tcs
3662                  *
3663                  * e.g. For a VSI that has TC0 and TC3 enabled the
3664                  * enabled_tc bitmap would be 0x00001001; the driver
3665                  * will set the numtc for netdev as 2 that will be
3666                  * referenced by the netdev layer as TC 0 and 1.
3667                  */
3668                 if (vsi->tc_config.enabled_tc & (1 << i))
3669                         netdev_set_tc_queue(netdev,
3670                                         vsi->tc_config.tc_info[i].netdev_tc,
3671                                         vsi->tc_config.tc_info[i].qcount,
3672                                         vsi->tc_config.tc_info[i].qoffset);
3673         }
3674
3675         /* Assign UP2TC map for the VSI */
3676         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3677                 /* Get the actual TC# for the UP */
3678                 u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
3679                 /* Get the mapped netdev TC# for the UP */
3680                 netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
3681                 netdev_set_prio_tc_map(netdev, i, netdev_tc);
3682         }
3683 }
3684
3685 /**
3686  * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
3687  * @vsi: the VSI being configured
3688  * @ctxt: the ctxt buffer returned from AQ VSI update param command
3689  **/
3690 static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
3691                                       struct i40e_vsi_context *ctxt)
3692 {
3693         /* copy just the sections touched not the entire info
3694          * since not all sections are valid as returned by
3695          * update vsi params
3696          */
3697         vsi->info.mapping_flags = ctxt->info.mapping_flags;
3698         memcpy(&vsi->info.queue_mapping,
3699                &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
3700         memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
3701                sizeof(vsi->info.tc_mapping));
3702 }
3703
3704 /**
3705  * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
3706  * @vsi: VSI to be configured
3707  * @enabled_tc: TC bitmap
3708  *
3709  * This configures a particular VSI for TCs that are mapped to the
3710  * given TC bitmap. It uses default bandwidth share for TCs across
3711  * VSIs to configure TC for a particular VSI.
3712  *
3713  * NOTE:
3714  * It is expected that the VSI queues have been quisced before calling
3715  * this function.
3716  **/
3717 static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3718 {
3719         u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
3720         struct i40e_vsi_context ctxt;
3721         int ret = 0;
3722         int i;
3723
3724         /* Check if enabled_tc is same as existing or new TCs */
3725         if (vsi->tc_config.enabled_tc == enabled_tc)
3726                 return ret;
3727
3728         /* Enable ETS TCs with equal BW Share for now across all VSIs */
3729         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3730                 if (enabled_tc & (1 << i))
3731                         bw_share[i] = 1;
3732         }
3733
3734         ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
3735         if (ret) {
3736                 dev_info(&vsi->back->pdev->dev,
3737                          "Failed configuring TC map %d for VSI %d\n",
3738                          enabled_tc, vsi->seid);
3739                 goto out;
3740         }
3741
3742         /* Update Queue Pairs Mapping for currently enabled UPs */
3743         ctxt.seid = vsi->seid;
3744         ctxt.pf_num = vsi->back->hw.pf_id;
3745         ctxt.vf_num = 0;
3746         ctxt.uplink_seid = vsi->uplink_seid;
3747         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
3748         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
3749
3750         /* Update the VSI after updating the VSI queue-mapping information */
3751         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
3752         if (ret) {
3753                 dev_info(&vsi->back->pdev->dev,
3754                          "update vsi failed, aq_err=%d\n",
3755                          vsi->back->hw.aq.asq_last_status);
3756                 goto out;
3757         }
3758         /* update the local VSI info with updated queue map */
3759         i40e_vsi_update_queue_map(vsi, &ctxt);
3760         vsi->info.valid_sections = 0;
3761
3762         /* Update current VSI BW information */
3763         ret = i40e_vsi_get_bw_info(vsi);
3764         if (ret) {
3765                 dev_info(&vsi->back->pdev->dev,
3766                          "Failed updating vsi bw info, aq_err=%d\n",
3767                          vsi->back->hw.aq.asq_last_status);
3768                 goto out;
3769         }
3770
3771         /* Update the netdev TC setup */
3772         i40e_vsi_config_netdev_tc(vsi, enabled_tc);
3773 out:
3774         return ret;
3775 }
3776
3777 /**
3778  * i40e_up_complete - Finish the last steps of bringing up a connection
3779  * @vsi: the VSI being configured
3780  **/
3781 static int i40e_up_complete(struct i40e_vsi *vsi)
3782 {
3783         struct i40e_pf *pf = vsi->back;
3784         int err;
3785
3786         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
3787                 i40e_vsi_configure_msix(vsi);
3788         else
3789                 i40e_configure_msi_and_legacy(vsi);
3790
3791         /* start rings */
3792         err = i40e_vsi_control_rings(vsi, true);
3793         if (err)
3794                 return err;
3795
3796         clear_bit(__I40E_DOWN, &vsi->state);
3797         i40e_napi_enable_all(vsi);
3798         i40e_vsi_enable_irq(vsi);
3799
3800         if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
3801             (vsi->netdev)) {
3802                 netdev_info(vsi->netdev, "NIC Link is Up\n");
3803                 netif_tx_start_all_queues(vsi->netdev);
3804                 netif_carrier_on(vsi->netdev);
3805         } else if (vsi->netdev) {
3806                 netdev_info(vsi->netdev, "NIC Link is Down\n");
3807         }
3808         i40e_service_event_schedule(pf);
3809
3810         return 0;
3811 }
3812
3813 /**
3814  * i40e_vsi_reinit_locked - Reset the VSI
3815  * @vsi: the VSI being configured
3816  *
3817  * Rebuild the ring structs after some configuration
3818  * has changed, e.g. MTU size.
3819  **/
3820 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
3821 {
3822         struct i40e_pf *pf = vsi->back;
3823
3824         WARN_ON(in_interrupt());
3825         while (test_and_set_bit(__I40E_CONFIG_BUSY, &pf->state))
3826                 usleep_range(1000, 2000);
3827         i40e_down(vsi);
3828
3829         /* Give a VF some time to respond to the reset.  The
3830          * two second wait is based upon the watchdog cycle in
3831          * the VF driver.
3832          */
3833         if (vsi->type == I40E_VSI_SRIOV)
3834                 msleep(2000);
3835         i40e_up(vsi);
3836         clear_bit(__I40E_CONFIG_BUSY, &pf->state);
3837 }
3838
3839 /**
3840  * i40e_up - Bring the connection back up after being down
3841  * @vsi: the VSI being configured
3842  **/
3843 int i40e_up(struct i40e_vsi *vsi)
3844 {
3845         int err;
3846
3847         err = i40e_vsi_configure(vsi);
3848         if (!err)
3849                 err = i40e_up_complete(vsi);
3850
3851         return err;
3852 }
3853
3854 /**
3855  * i40e_down - Shutdown the connection processing
3856  * @vsi: the VSI being stopped
3857  **/
3858 void i40e_down(struct i40e_vsi *vsi)
3859 {
3860         int i;
3861
3862         /* It is assumed that the caller of this function
3863          * sets the vsi->state __I40E_DOWN bit.
3864          */
3865         if (vsi->netdev) {
3866                 netif_carrier_off(vsi->netdev);
3867                 netif_tx_disable(vsi->netdev);
3868         }
3869         i40e_vsi_disable_irq(vsi);
3870         i40e_vsi_control_rings(vsi, false);
3871         i40e_napi_disable_all(vsi);
3872
3873         for (i = 0; i < vsi->num_queue_pairs; i++) {
3874                 i40e_clean_tx_ring(vsi->tx_rings[i]);
3875                 i40e_clean_rx_ring(vsi->rx_rings[i]);
3876         }
3877 }
3878
3879 /**
3880  * i40e_setup_tc - configure multiple traffic classes
3881  * @netdev: net device to configure
3882  * @tc: number of traffic classes to enable
3883  **/
3884 static int i40e_setup_tc(struct net_device *netdev, u8 tc)
3885 {
3886         struct i40e_netdev_priv *np = netdev_priv(netdev);
3887         struct i40e_vsi *vsi = np->vsi;
3888         struct i40e_pf *pf = vsi->back;
3889         u8 enabled_tc = 0;
3890         int ret = -EINVAL;
3891         int i;
3892
3893         /* Check if DCB enabled to continue */
3894         if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) {
3895                 netdev_info(netdev, "DCB is not enabled for adapter\n");
3896                 goto exit;
3897         }
3898
3899         /* Check if MFP enabled */
3900         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
3901                 netdev_info(netdev, "Configuring TC not supported in MFP mode\n");
3902                 goto exit;
3903         }
3904
3905         /* Check whether tc count is within enabled limit */
3906         if (tc > i40e_pf_get_num_tc(pf)) {
3907                 netdev_info(netdev, "TC count greater than enabled on link for adapter\n");
3908                 goto exit;
3909         }
3910
3911         /* Generate TC map for number of tc requested */
3912         for (i = 0; i < tc; i++)
3913                 enabled_tc |= (1 << i);
3914
3915         /* Requesting same TC configuration as already enabled */
3916         if (enabled_tc == vsi->tc_config.enabled_tc)
3917                 return 0;
3918
3919         /* Quiesce VSI queues */
3920         i40e_quiesce_vsi(vsi);
3921
3922         /* Configure VSI for enabled TCs */
3923         ret = i40e_vsi_config_tc(vsi, enabled_tc);
3924         if (ret) {
3925                 netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
3926                             vsi->seid);
3927                 goto exit;
3928         }
3929
3930         /* Unquiesce VSI */
3931         i40e_unquiesce_vsi(vsi);
3932
3933 exit:
3934         return ret;
3935 }
3936
3937 /**
3938  * i40e_open - Called when a network interface is made active
3939  * @netdev: network interface device structure
3940  *
3941  * The open entry point is called when a network interface is made
3942  * active by the system (IFF_UP).  At this point all resources needed
3943  * for transmit and receive operations are allocated, the interrupt
3944  * handler is registered with the OS, the netdev watchdog subtask is
3945  * enabled, and the stack is notified that the interface is ready.
3946  *
3947  * Returns 0 on success, negative value on failure
3948  **/
3949 static int i40e_open(struct net_device *netdev)
3950 {
3951         struct i40e_netdev_priv *np = netdev_priv(netdev);
3952         struct i40e_vsi *vsi = np->vsi;
3953         struct i40e_pf *pf = vsi->back;
3954         char int_name[IFNAMSIZ];
3955         int err;
3956
3957         /* disallow open during test */
3958         if (test_bit(__I40E_TESTING, &pf->state))
3959                 return -EBUSY;
3960
3961         netif_carrier_off(netdev);
3962
3963         /* allocate descriptors */
3964         err = i40e_vsi_setup_tx_resources(vsi);
3965         if (err)
3966                 goto err_setup_tx;
3967         err = i40e_vsi_setup_rx_resources(vsi);
3968         if (err)
3969                 goto err_setup_rx;
3970
3971         err = i40e_vsi_configure(vsi);
3972         if (err)
3973                 goto err_setup_rx;
3974
3975         snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
3976                  dev_driver_string(&pf->pdev->dev), netdev->name);
3977         err = i40e_vsi_request_irq(vsi, int_name);
3978         if (err)
3979                 goto err_setup_rx;
3980
3981         /* Notify the stack of the actual queue counts. */
3982         err = netif_set_real_num_tx_queues(netdev, vsi->num_queue_pairs);
3983         if (err)
3984                 goto err_set_queues;
3985
3986         err = netif_set_real_num_rx_queues(netdev, vsi->num_queue_pairs);
3987         if (err)
3988                 goto err_set_queues;
3989
3990         err = i40e_up_complete(vsi);
3991         if (err)
3992                 goto err_up_complete;
3993
3994 #ifdef CONFIG_I40E_VXLAN
3995         vxlan_get_rx_port(netdev);
3996 #endif
3997
3998         return 0;
3999
4000 err_up_complete:
4001         i40e_down(vsi);
4002 err_set_queues:
4003         i40e_vsi_free_irq(vsi);
4004 err_setup_rx:
4005         i40e_vsi_free_rx_resources(vsi);
4006 err_setup_tx:
4007         i40e_vsi_free_tx_resources(vsi);
4008         if (vsi == pf->vsi[pf->lan_vsi])
4009                 i40e_do_reset(pf, (1 << __I40E_PF_RESET_REQUESTED));
4010
4011         return err;
4012 }
4013
4014 /**
4015  * i40e_close - Disables a network interface
4016  * @netdev: network interface device structure
4017  *
4018  * The close entry point is called when an interface is de-activated
4019  * by the OS.  The hardware is still under the driver's control, but
4020  * this netdev interface is disabled.
4021  *
4022  * Returns 0, this is not allowed to fail
4023  **/
4024 static int i40e_close(struct net_device *netdev)
4025 {
4026         struct i40e_netdev_priv *np = netdev_priv(netdev);
4027         struct i40e_vsi *vsi = np->vsi;
4028
4029         if (test_and_set_bit(__I40E_DOWN, &vsi->state))
4030                 return 0;
4031
4032         i40e_down(vsi);
4033         i40e_vsi_free_irq(vsi);
4034
4035         i40e_vsi_free_tx_resources(vsi);
4036         i40e_vsi_free_rx_resources(vsi);
4037
4038         return 0;
4039 }
4040
4041 /**
4042  * i40e_do_reset - Start a PF or Core Reset sequence
4043  * @pf: board private structure
4044  * @reset_flags: which reset is requested
4045  *
4046  * The essential difference in resets is that the PF Reset
4047  * doesn't clear the packet buffers, doesn't reset the PE
4048  * firmware, and doesn't bother the other PFs on the chip.
4049  **/
4050 void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags)
4051 {
4052         u32 val;
4053
4054         WARN_ON(in_interrupt());
4055
4056         /* do the biggest reset indicated */
4057         if (reset_flags & (1 << __I40E_GLOBAL_RESET_REQUESTED)) {
4058
4059                 /* Request a Global Reset
4060                  *
4061                  * This will start the chip's countdown to the actual full
4062                  * chip reset event, and a warning interrupt to be sent
4063                  * to all PFs, including the requestor.  Our handler
4064                  * for the warning interrupt will deal with the shutdown
4065                  * and recovery of the switch setup.
4066                  */
4067                 dev_info(&pf->pdev->dev, "GlobalR requested\n");
4068                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4069                 val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
4070                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4071
4072         } else if (reset_flags & (1 << __I40E_CORE_RESET_REQUESTED)) {
4073
4074                 /* Request a Core Reset
4075                  *
4076                  * Same as Global Reset, except does *not* include the MAC/PHY
4077                  */
4078                 dev_info(&pf->pdev->dev, "CoreR requested\n");
4079                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4080                 val |= I40E_GLGEN_RTRIG_CORER_MASK;
4081                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4082                 i40e_flush(&pf->hw);
4083
4084         } else if (reset_flags & (1 << __I40E_EMP_RESET_REQUESTED)) {
4085
4086                 /* Request a Firmware Reset
4087                  *
4088                  * Same as Global reset, plus restarting the
4089                  * embedded firmware engine.
4090                  */
4091                 /* enable EMP Reset */
4092                 val = rd32(&pf->hw, I40E_GLGEN_RSTENA_EMP);
4093                 val |= I40E_GLGEN_RSTENA_EMP_EMP_RST_ENA_MASK;
4094                 wr32(&pf->hw, I40E_GLGEN_RSTENA_EMP, val);
4095
4096                 /* force the reset */
4097                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4098                 val |= I40E_GLGEN_RTRIG_EMPFWR_MASK;
4099                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4100                 i40e_flush(&pf->hw);
4101
4102         } else if (reset_flags & (1 << __I40E_PF_RESET_REQUESTED)) {
4103
4104                 /* Request a PF Reset
4105                  *
4106                  * Resets only the PF-specific registers
4107                  *
4108                  * This goes directly to the tear-down and rebuild of
4109                  * the switch, since we need to do all the recovery as
4110                  * for the Core Reset.
4111                  */
4112                 dev_info(&pf->pdev->dev, "PFR requested\n");
4113                 i40e_handle_reset_warning(pf);
4114
4115         } else if (reset_flags & (1 << __I40E_REINIT_REQUESTED)) {
4116                 int v;
4117
4118                 /* Find the VSI(s) that requested a re-init */
4119                 dev_info(&pf->pdev->dev,
4120                          "VSI reinit requested\n");
4121                 for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4122                         struct i40e_vsi *vsi = pf->vsi[v];
4123                         if (vsi != NULL &&
4124                             test_bit(__I40E_REINIT_REQUESTED, &vsi->state)) {
4125                                 i40e_vsi_reinit_locked(pf->vsi[v]);
4126                                 clear_bit(__I40E_REINIT_REQUESTED, &vsi->state);
4127                         }
4128                 }
4129
4130                 /* no further action needed, so return now */
4131                 return;
4132         } else {
4133                 dev_info(&pf->pdev->dev,
4134                          "bad reset request 0x%08x\n", reset_flags);
4135                 return;
4136         }
4137 }
4138
4139 /**
4140  * i40e_do_reset_safe - Protected reset path for userland calls.
4141  * @pf: board private structure
4142  * @reset_flags: which reset is requested
4143  *
4144  **/
4145 void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags)
4146 {
4147         rtnl_lock();
4148         i40e_do_reset(pf, reset_flags);
4149         rtnl_unlock();
4150 }
4151
4152 /**
4153  * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
4154  * @pf: board private structure
4155  * @e: event info posted on ARQ
4156  *
4157  * Handler for LAN Queue Overflow Event generated by the firmware for PF
4158  * and VF queues
4159  **/
4160 static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
4161                                            struct i40e_arq_event_info *e)
4162 {
4163         struct i40e_aqc_lan_overflow *data =
4164                 (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
4165         u32 queue = le32_to_cpu(data->prtdcb_rupto);
4166         u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
4167         struct i40e_hw *hw = &pf->hw;
4168         struct i40e_vf *vf;
4169         u16 vf_id;
4170
4171         dev_info(&pf->pdev->dev, "%s: Rx Queue Number = %d QTX_CTL=0x%08x\n",
4172                  __func__, queue, qtx_ctl);
4173
4174         /* Queue belongs to VF, find the VF and issue VF reset */
4175         if (((qtx_ctl & I40E_QTX_CTL_PFVF_Q_MASK)
4176             >> I40E_QTX_CTL_PFVF_Q_SHIFT) == I40E_QTX_CTL_VF_QUEUE) {
4177                 vf_id = (u16)((qtx_ctl & I40E_QTX_CTL_VFVM_INDX_MASK)
4178                          >> I40E_QTX_CTL_VFVM_INDX_SHIFT);
4179                 vf_id -= hw->func_caps.vf_base_id;
4180                 vf = &pf->vf[vf_id];
4181                 i40e_vc_notify_vf_reset(vf);
4182                 /* Allow VF to process pending reset notification */
4183                 msleep(20);
4184                 i40e_reset_vf(vf, false);
4185         }
4186 }
4187
4188 /**
4189  * i40e_service_event_complete - Finish up the service event
4190  * @pf: board private structure
4191  **/
4192 static void i40e_service_event_complete(struct i40e_pf *pf)
4193 {
4194         BUG_ON(!test_bit(__I40E_SERVICE_SCHED, &pf->state));
4195
4196         /* flush memory to make sure state is correct before next watchog */
4197         smp_mb__before_clear_bit();
4198         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
4199 }
4200
4201 /**
4202  * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
4203  * @pf: board private structure
4204  **/
4205 static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
4206 {
4207         if (!(pf->flags & I40E_FLAG_FDIR_REQUIRES_REINIT))
4208                 return;
4209
4210         pf->flags &= ~I40E_FLAG_FDIR_REQUIRES_REINIT;
4211
4212         /* if interface is down do nothing */
4213         if (test_bit(__I40E_DOWN, &pf->state))
4214                 return;
4215 }
4216
4217 /**
4218  * i40e_vsi_link_event - notify VSI of a link event
4219  * @vsi: vsi to be notified
4220  * @link_up: link up or down
4221  **/
4222 static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
4223 {
4224         if (!vsi)
4225                 return;
4226
4227         switch (vsi->type) {
4228         case I40E_VSI_MAIN:
4229                 if (!vsi->netdev || !vsi->netdev_registered)
4230                         break;
4231
4232                 if (link_up) {
4233                         netif_carrier_on(vsi->netdev);
4234                         netif_tx_wake_all_queues(vsi->netdev);
4235                 } else {
4236                         netif_carrier_off(vsi->netdev);
4237                         netif_tx_stop_all_queues(vsi->netdev);
4238                 }
4239                 break;
4240
4241         case I40E_VSI_SRIOV:
4242                 break;
4243
4244         case I40E_VSI_VMDQ2:
4245         case I40E_VSI_CTRL:
4246         case I40E_VSI_MIRROR:
4247         default:
4248                 /* there is no notification for other VSIs */
4249                 break;
4250         }
4251 }
4252
4253 /**
4254  * i40e_veb_link_event - notify elements on the veb of a link event
4255  * @veb: veb to be notified
4256  * @link_up: link up or down
4257  **/
4258 static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
4259 {
4260         struct i40e_pf *pf;
4261         int i;
4262
4263         if (!veb || !veb->pf)
4264                 return;
4265         pf = veb->pf;
4266
4267         /* depth first... */
4268         for (i = 0; i < I40E_MAX_VEB; i++)
4269                 if (pf->veb[i] && (pf->veb[i]->uplink_seid == veb->seid))
4270                         i40e_veb_link_event(pf->veb[i], link_up);
4271
4272         /* ... now the local VSIs */
4273         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4274                 if (pf->vsi[i] && (pf->vsi[i]->uplink_seid == veb->seid))
4275                         i40e_vsi_link_event(pf->vsi[i], link_up);
4276 }
4277
4278 /**
4279  * i40e_link_event - Update netif_carrier status
4280  * @pf: board private structure
4281  **/
4282 static void i40e_link_event(struct i40e_pf *pf)
4283 {
4284         bool new_link, old_link;
4285
4286         new_link = (pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP);
4287         old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);
4288
4289         if (new_link == old_link)
4290                 return;
4291
4292         if (!test_bit(__I40E_DOWN, &pf->vsi[pf->lan_vsi]->state))
4293                 netdev_info(pf->vsi[pf->lan_vsi]->netdev,
4294                             "NIC Link is %s\n", (new_link ? "Up" : "Down"));
4295
4296         /* Notify the base of the switch tree connected to
4297          * the link.  Floating VEBs are not notified.
4298          */
4299         if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
4300                 i40e_veb_link_event(pf->veb[pf->lan_veb], new_link);
4301         else
4302                 i40e_vsi_link_event(pf->vsi[pf->lan_vsi], new_link);
4303
4304         if (pf->vf)
4305                 i40e_vc_notify_link_state(pf);
4306 }
4307
4308 /**
4309  * i40e_check_hang_subtask - Check for hung queues and dropped interrupts
4310  * @pf: board private structure
4311  *
4312  * Set the per-queue flags to request a check for stuck queues in the irq
4313  * clean functions, then force interrupts to be sure the irq clean is called.
4314  **/
4315 static void i40e_check_hang_subtask(struct i40e_pf *pf)
4316 {
4317         int i, v;
4318
4319         /* If we're down or resetting, just bail */
4320         if (test_bit(__I40E_CONFIG_BUSY, &pf->state))
4321                 return;
4322
4323         /* for each VSI/netdev
4324          *     for each Tx queue
4325          *         set the check flag
4326          *     for each q_vector
4327          *         force an interrupt
4328          */
4329         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4330                 struct i40e_vsi *vsi = pf->vsi[v];
4331                 int armed = 0;
4332
4333                 if (!pf->vsi[v] ||
4334                     test_bit(__I40E_DOWN, &vsi->state) ||
4335                     (vsi->netdev && !netif_carrier_ok(vsi->netdev)))
4336                         continue;
4337
4338                 for (i = 0; i < vsi->num_queue_pairs; i++) {
4339                         set_check_for_tx_hang(vsi->tx_rings[i]);
4340                         if (test_bit(__I40E_HANG_CHECK_ARMED,
4341                                      &vsi->tx_rings[i]->state))
4342                                 armed++;
4343                 }
4344
4345                 if (armed) {
4346                         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
4347                                 wr32(&vsi->back->hw, I40E_PFINT_DYN_CTL0,
4348                                      (I40E_PFINT_DYN_CTL0_INTENA_MASK |
4349                                       I40E_PFINT_DYN_CTL0_SWINT_TRIG_MASK));
4350                         } else {
4351                                 u16 vec = vsi->base_vector - 1;
4352                                 u32 val = (I40E_PFINT_DYN_CTLN_INTENA_MASK |
4353                                            I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK);
4354                                 for (i = 0; i < vsi->num_q_vectors; i++, vec++)
4355                                         wr32(&vsi->back->hw,
4356                                              I40E_PFINT_DYN_CTLN(vec), val);
4357                         }
4358                         i40e_flush(&vsi->back->hw);
4359                 }
4360         }
4361 }
4362
4363 /**
4364  * i40e_watchdog_subtask - Check and bring link up
4365  * @pf: board private structure
4366  **/
4367 static void i40e_watchdog_subtask(struct i40e_pf *pf)
4368 {
4369         int i;
4370
4371         /* if interface is down do nothing */
4372         if (test_bit(__I40E_DOWN, &pf->state) ||
4373             test_bit(__I40E_CONFIG_BUSY, &pf->state))
4374                 return;
4375
4376         /* Update the stats for active netdevs so the network stack
4377          * can look at updated numbers whenever it cares to
4378          */
4379         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4380                 if (pf->vsi[i] && pf->vsi[i]->netdev)
4381                         i40e_update_stats(pf->vsi[i]);
4382
4383         /* Update the stats for the active switching components */
4384         for (i = 0; i < I40E_MAX_VEB; i++)
4385                 if (pf->veb[i])
4386                         i40e_update_veb_stats(pf->veb[i]);
4387 }
4388
4389 /**
4390  * i40e_reset_subtask - Set up for resetting the device and driver
4391  * @pf: board private structure
4392  **/
4393 static void i40e_reset_subtask(struct i40e_pf *pf)
4394 {
4395         u32 reset_flags = 0;
4396
4397         rtnl_lock();
4398         if (test_bit(__I40E_REINIT_REQUESTED, &pf->state)) {
4399                 reset_flags |= (1 << __I40E_REINIT_REQUESTED);
4400                 clear_bit(__I40E_REINIT_REQUESTED, &pf->state);
4401         }
4402         if (test_bit(__I40E_PF_RESET_REQUESTED, &pf->state)) {
4403                 reset_flags |= (1 << __I40E_PF_RESET_REQUESTED);
4404                 clear_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
4405         }
4406         if (test_bit(__I40E_CORE_RESET_REQUESTED, &pf->state)) {
4407                 reset_flags |= (1 << __I40E_CORE_RESET_REQUESTED);
4408                 clear_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
4409         }
4410         if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state)) {
4411                 reset_flags |= (1 << __I40E_GLOBAL_RESET_REQUESTED);
4412                 clear_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
4413         }
4414
4415         /* If there's a recovery already waiting, it takes
4416          * precedence before starting a new reset sequence.
4417          */
4418         if (test_bit(__I40E_RESET_INTR_RECEIVED, &pf->state)) {
4419                 i40e_handle_reset_warning(pf);
4420                 goto unlock;
4421         }
4422
4423         /* If we're already down or resetting, just bail */
4424         if (reset_flags &&
4425             !test_bit(__I40E_DOWN, &pf->state) &&
4426             !test_bit(__I40E_CONFIG_BUSY, &pf->state))
4427                 i40e_do_reset(pf, reset_flags);
4428
4429 unlock:
4430         rtnl_unlock();
4431 }
4432
4433 /**
4434  * i40e_handle_link_event - Handle link event
4435  * @pf: board private structure
4436  * @e: event info posted on ARQ
4437  **/
4438 static void i40e_handle_link_event(struct i40e_pf *pf,
4439                                    struct i40e_arq_event_info *e)
4440 {
4441         struct i40e_hw *hw = &pf->hw;
4442         struct i40e_aqc_get_link_status *status =
4443                 (struct i40e_aqc_get_link_status *)&e->desc.params.raw;
4444         struct i40e_link_status *hw_link_info = &hw->phy.link_info;
4445
4446         /* save off old link status information */
4447         memcpy(&pf->hw.phy.link_info_old, hw_link_info,
4448                sizeof(pf->hw.phy.link_info_old));
4449
4450         /* update link status */
4451         hw_link_info->phy_type = (enum i40e_aq_phy_type)status->phy_type;
4452         hw_link_info->link_speed = (enum i40e_aq_link_speed)status->link_speed;
4453         hw_link_info->link_info = status->link_info;
4454         hw_link_info->an_info = status->an_info;
4455         hw_link_info->ext_info = status->ext_info;
4456         hw_link_info->lse_enable =
4457                 le16_to_cpu(status->command_flags) &
4458                             I40E_AQ_LSE_ENABLE;
4459
4460         /* process the event */
4461         i40e_link_event(pf);
4462
4463         /* Do a new status request to re-enable LSE reporting
4464          * and load new status information into the hw struct,
4465          * then see if the status changed while processing the
4466          * initial event.
4467          */
4468         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
4469         i40e_link_event(pf);
4470 }
4471
4472 /**
4473  * i40e_clean_adminq_subtask - Clean the AdminQ rings
4474  * @pf: board private structure
4475  **/
4476 static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
4477 {
4478         struct i40e_arq_event_info event;
4479         struct i40e_hw *hw = &pf->hw;
4480         u16 pending, i = 0;
4481         i40e_status ret;
4482         u16 opcode;
4483         u32 val;
4484
4485         if (!test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state))
4486                 return;
4487
4488         event.msg_size = I40E_MAX_AQ_BUF_SIZE;
4489         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
4490         if (!event.msg_buf)
4491                 return;
4492
4493         do {
4494                 event.msg_size = I40E_MAX_AQ_BUF_SIZE; /* reinit each time */
4495                 ret = i40e_clean_arq_element(hw, &event, &pending);
4496                 if (ret == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
4497                         dev_info(&pf->pdev->dev, "No ARQ event found\n");
4498                         break;
4499                 } else if (ret) {
4500                         dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
4501                         break;
4502                 }
4503
4504                 opcode = le16_to_cpu(event.desc.opcode);
4505                 switch (opcode) {
4506
4507                 case i40e_aqc_opc_get_link_status:
4508                         i40e_handle_link_event(pf, &event);
4509                         break;
4510                 case i40e_aqc_opc_send_msg_to_pf:
4511                         ret = i40e_vc_process_vf_msg(pf,
4512                                         le16_to_cpu(event.desc.retval),
4513                                         le32_to_cpu(event.desc.cookie_high),
4514                                         le32_to_cpu(event.desc.cookie_low),
4515                                         event.msg_buf,
4516                                         event.msg_size);
4517                         break;
4518                 case i40e_aqc_opc_lldp_update_mib:
4519                         dev_info(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
4520                         break;
4521                 case i40e_aqc_opc_event_lan_overflow:
4522                         dev_info(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
4523                         i40e_handle_lan_overflow_event(pf, &event);
4524                         break;
4525                 case i40e_aqc_opc_send_msg_to_peer:
4526                         dev_info(&pf->pdev->dev, "ARQ: Msg from other pf\n");
4527                         break;
4528                 default:
4529                         dev_info(&pf->pdev->dev,
4530                                  "ARQ Error: Unknown event 0x%04x received\n",
4531                                  opcode);
4532                         break;
4533                 }
4534         } while (pending && (i++ < pf->adminq_work_limit));
4535
4536         clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
4537         /* re-enable Admin queue interrupt cause */
4538         val = rd32(hw, I40E_PFINT_ICR0_ENA);
4539         val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
4540         wr32(hw, I40E_PFINT_ICR0_ENA, val);
4541         i40e_flush(hw);
4542
4543         kfree(event.msg_buf);
4544 }
4545
4546 /**
4547  * i40e_reconstitute_veb - rebuild the VEB and anything connected to it
4548  * @veb: pointer to the VEB instance
4549  *
4550  * This is a recursive function that first builds the attached VSIs then
4551  * recurses in to build the next layer of VEB.  We track the connections
4552  * through our own index numbers because the seid's from the HW could
4553  * change across the reset.
4554  **/
4555 static int i40e_reconstitute_veb(struct i40e_veb *veb)
4556 {
4557         struct i40e_vsi *ctl_vsi = NULL;
4558         struct i40e_pf *pf = veb->pf;
4559         int v, veb_idx;
4560         int ret;
4561
4562         /* build VSI that owns this VEB, temporarily attached to base VEB */
4563         for (v = 0; v < pf->hw.func_caps.num_vsis && !ctl_vsi; v++) {
4564                 if (pf->vsi[v] &&
4565                     pf->vsi[v]->veb_idx == veb->idx &&
4566                     pf->vsi[v]->flags & I40E_VSI_FLAG_VEB_OWNER) {
4567                         ctl_vsi = pf->vsi[v];
4568                         break;
4569                 }
4570         }
4571         if (!ctl_vsi) {
4572                 dev_info(&pf->pdev->dev,
4573                          "missing owner VSI for veb_idx %d\n", veb->idx);
4574                 ret = -ENOENT;
4575                 goto end_reconstitute;
4576         }
4577         if (ctl_vsi != pf->vsi[pf->lan_vsi])
4578                 ctl_vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
4579         ret = i40e_add_vsi(ctl_vsi);
4580         if (ret) {
4581                 dev_info(&pf->pdev->dev,
4582                          "rebuild of owner VSI failed: %d\n", ret);
4583                 goto end_reconstitute;
4584         }
4585         i40e_vsi_reset_stats(ctl_vsi);
4586
4587         /* create the VEB in the switch and move the VSI onto the VEB */
4588         ret = i40e_add_veb(veb, ctl_vsi);
4589         if (ret)
4590                 goto end_reconstitute;
4591
4592         /* create the remaining VSIs attached to this VEB */
4593         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4594                 if (!pf->vsi[v] || pf->vsi[v] == ctl_vsi)
4595                         continue;
4596
4597                 if (pf->vsi[v]->veb_idx == veb->idx) {
4598                         struct i40e_vsi *vsi = pf->vsi[v];
4599                         vsi->uplink_seid = veb->seid;
4600                         ret = i40e_add_vsi(vsi);
4601                         if (ret) {
4602                                 dev_info(&pf->pdev->dev,
4603                                          "rebuild of vsi_idx %d failed: %d\n",
4604                                          v, ret);
4605                                 goto end_reconstitute;
4606                         }
4607                         i40e_vsi_reset_stats(vsi);
4608                 }
4609         }
4610
4611         /* create any VEBs attached to this VEB - RECURSION */
4612         for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
4613                 if (pf->veb[veb_idx] && pf->veb[veb_idx]->veb_idx == veb->idx) {
4614                         pf->veb[veb_idx]->uplink_seid = veb->seid;
4615                         ret = i40e_reconstitute_veb(pf->veb[veb_idx]);
4616                         if (ret)
4617                                 break;
4618                 }
4619         }
4620
4621 end_reconstitute:
4622         return ret;
4623 }
4624
4625 /**
4626  * i40e_get_capabilities - get info about the HW
4627  * @pf: the PF struct
4628  **/
4629 static int i40e_get_capabilities(struct i40e_pf *pf)
4630 {
4631         struct i40e_aqc_list_capabilities_element_resp *cap_buf;
4632         u16 data_size;
4633         int buf_len;
4634         int err;
4635
4636         buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
4637         do {
4638                 cap_buf = kzalloc(buf_len, GFP_KERNEL);
4639                 if (!cap_buf)
4640                         return -ENOMEM;
4641
4642                 /* this loads the data into the hw struct for us */
4643                 err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
4644                                             &data_size,
4645                                             i40e_aqc_opc_list_func_capabilities,
4646                                             NULL);
4647                 /* data loaded, buffer no longer needed */
4648                 kfree(cap_buf);
4649
4650                 if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
4651                         /* retry with a larger buffer */
4652                         buf_len = data_size;
4653                 } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK) {
4654                         dev_info(&pf->pdev->dev,
4655                                  "capability discovery failed: aq=%d\n",
4656                                  pf->hw.aq.asq_last_status);
4657                         return -ENODEV;
4658                 }
4659         } while (err);
4660
4661         if (pf->hw.revision_id == 0 && (pf->flags & I40E_FLAG_MFP_ENABLED)) {
4662                 pf->hw.func_caps.num_msix_vectors += 1;
4663                 pf->hw.func_caps.num_tx_qp =
4664                         min_t(int, pf->hw.func_caps.num_tx_qp,
4665                               I40E_MAX_NPAR_QPS);
4666         }
4667
4668         if (pf->hw.debug_mask & I40E_DEBUG_USER)
4669                 dev_info(&pf->pdev->dev,
4670                          "pf=%d, num_vfs=%d, msix_pf=%d, msix_vf=%d, fd_g=%d, fd_b=%d, pf_max_q=%d num_vsi=%d\n",
4671                          pf->hw.pf_id, pf->hw.func_caps.num_vfs,
4672                          pf->hw.func_caps.num_msix_vectors,
4673                          pf->hw.func_caps.num_msix_vectors_vf,
4674                          pf->hw.func_caps.fd_filters_guaranteed,
4675                          pf->hw.func_caps.fd_filters_best_effort,
4676                          pf->hw.func_caps.num_tx_qp,
4677                          pf->hw.func_caps.num_vsis);
4678
4679 #define DEF_NUM_VSI (1 + (pf->hw.func_caps.fcoe ? 1 : 0) \
4680                        + pf->hw.func_caps.num_vfs)
4681         if (pf->hw.revision_id == 0 && (DEF_NUM_VSI > pf->hw.func_caps.num_vsis)) {
4682                 dev_info(&pf->pdev->dev,
4683                          "got num_vsis %d, setting num_vsis to %d\n",
4684                          pf->hw.func_caps.num_vsis, DEF_NUM_VSI);
4685                 pf->hw.func_caps.num_vsis = DEF_NUM_VSI;
4686         }
4687
4688         return 0;
4689 }
4690
4691 /**
4692  * i40e_fdir_setup - initialize the Flow Director resources
4693  * @pf: board private structure
4694  **/
4695 static void i40e_fdir_setup(struct i40e_pf *pf)
4696 {
4697         struct i40e_vsi *vsi;
4698         bool new_vsi = false;
4699         int err, i;
4700
4701         if (!(pf->flags & (I40E_FLAG_FDIR_ENABLED |
4702                            I40E_FLAG_FDIR_ATR_ENABLED)))
4703                 return;
4704
4705         pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
4706
4707         /* find existing or make new FDIR VSI */
4708         vsi = NULL;
4709         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4710                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR)
4711                         vsi = pf->vsi[i];
4712         if (!vsi) {
4713                 vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR, pf->mac_seid, 0);
4714                 if (!vsi) {
4715                         dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
4716                         pf->flags &= ~I40E_FLAG_FDIR_ENABLED;
4717                         return;
4718                 }
4719                 new_vsi = true;
4720         }
4721         WARN_ON(vsi->base_queue != I40E_FDIR_RING);
4722         i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_rings);
4723
4724         err = i40e_vsi_setup_tx_resources(vsi);
4725         if (!err)
4726                 err = i40e_vsi_setup_rx_resources(vsi);
4727         if (!err)
4728                 err = i40e_vsi_configure(vsi);
4729         if (!err && new_vsi) {
4730                 char int_name[IFNAMSIZ + 9];
4731                 snprintf(int_name, sizeof(int_name) - 1, "%s-fdir",
4732                          dev_driver_string(&pf->pdev->dev));
4733                 err = i40e_vsi_request_irq(vsi, int_name);
4734         }
4735         if (!err)
4736                 err = i40e_up_complete(vsi);
4737
4738         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
4739 }
4740
4741 /**
4742  * i40e_fdir_teardown - release the Flow Director resources
4743  * @pf: board private structure
4744  **/
4745 static void i40e_fdir_teardown(struct i40e_pf *pf)
4746 {
4747         int i;
4748
4749         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
4750                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
4751                         i40e_vsi_release(pf->vsi[i]);
4752                         break;
4753                 }
4754         }
4755 }
4756
4757 /**
4758  * i40e_prep_for_reset - prep for the core to reset
4759  * @pf: board private structure
4760  *
4761  * Close up the VFs and other things in prep for pf Reset.
4762   **/
4763 static int i40e_prep_for_reset(struct i40e_pf *pf)
4764 {
4765         struct i40e_hw *hw = &pf->hw;
4766         i40e_status ret;
4767         u32 v;
4768
4769         clear_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
4770         if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
4771                 return 0;
4772
4773         dev_info(&pf->pdev->dev, "Tearing down internal switch for reset\n");
4774
4775         if (i40e_check_asq_alive(hw))
4776                 i40e_vc_notify_reset(pf);
4777
4778         /* quiesce the VSIs and their queues that are not already DOWN */
4779         i40e_pf_quiesce_all_vsi(pf);
4780
4781         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4782                 if (pf->vsi[v])
4783                         pf->vsi[v]->seid = 0;
4784         }
4785
4786         i40e_shutdown_adminq(&pf->hw);
4787
4788         /* call shutdown HMC */
4789         ret = i40e_shutdown_lan_hmc(hw);
4790         if (ret) {
4791                 dev_info(&pf->pdev->dev, "shutdown_lan_hmc failed: %d\n", ret);
4792                 clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
4793         }
4794         return ret;
4795 }
4796
4797 /**
4798  * i40e_reset_and_rebuild - reset and rebuild using a saved config
4799  * @pf: board private structure
4800  * @reinit: if the Main VSI needs to re-initialized.
4801  **/
4802 static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
4803 {
4804         struct i40e_driver_version dv;
4805         struct i40e_hw *hw = &pf->hw;
4806         i40e_status ret;
4807         u32 v;
4808
4809         /* Now we wait for GRST to settle out.
4810          * We don't have to delete the VEBs or VSIs from the hw switch
4811          * because the reset will make them disappear.
4812          */
4813         ret = i40e_pf_reset(hw);
4814         if (ret)
4815                 dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
4816         pf->pfr_count++;
4817
4818         if (test_bit(__I40E_DOWN, &pf->state))
4819                 goto end_core_reset;
4820         dev_info(&pf->pdev->dev, "Rebuilding internal switch\n");
4821
4822         /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
4823         ret = i40e_init_adminq(&pf->hw);
4824         if (ret) {
4825                 dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, %d\n", ret);
4826                 goto end_core_reset;
4827         }
4828
4829         ret = i40e_get_capabilities(pf);
4830         if (ret) {
4831                 dev_info(&pf->pdev->dev, "i40e_get_capabilities failed, %d\n",
4832                          ret);
4833                 goto end_core_reset;
4834         }
4835
4836         ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
4837                                 hw->func_caps.num_rx_qp,
4838                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
4839         if (ret) {
4840                 dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
4841                 goto end_core_reset;
4842         }
4843         ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
4844         if (ret) {
4845                 dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
4846                 goto end_core_reset;
4847         }
4848
4849         /* do basic switch setup */
4850         ret = i40e_setup_pf_switch(pf, reinit);
4851         if (ret)
4852                 goto end_core_reset;
4853
4854         /* Rebuild the VSIs and VEBs that existed before reset.
4855          * They are still in our local switch element arrays, so only
4856          * need to rebuild the switch model in the HW.
4857          *
4858          * If there were VEBs but the reconstitution failed, we'll try
4859          * try to recover minimal use by getting the basic PF VSI working.
4860          */
4861         if (pf->vsi[pf->lan_vsi]->uplink_seid != pf->mac_seid) {
4862                 dev_info(&pf->pdev->dev, "attempting to rebuild switch\n");
4863                 /* find the one VEB connected to the MAC, and find orphans */
4864                 for (v = 0; v < I40E_MAX_VEB; v++) {
4865                         if (!pf->veb[v])
4866                                 continue;
4867
4868                         if (pf->veb[v]->uplink_seid == pf->mac_seid ||
4869                             pf->veb[v]->uplink_seid == 0) {
4870                                 ret = i40e_reconstitute_veb(pf->veb[v]);
4871
4872                                 if (!ret)
4873                                         continue;
4874
4875                                 /* If Main VEB failed, we're in deep doodoo,
4876                                  * so give up rebuilding the switch and set up
4877                                  * for minimal rebuild of PF VSI.
4878                                  * If orphan failed, we'll report the error
4879                                  * but try to keep going.
4880                                  */
4881                                 if (pf->veb[v]->uplink_seid == pf->mac_seid) {
4882                                         dev_info(&pf->pdev->dev,
4883                                                  "rebuild of switch failed: %d, will try to set up simple PF connection\n",
4884                                                  ret);
4885                                         pf->vsi[pf->lan_vsi]->uplink_seid
4886                                                                 = pf->mac_seid;
4887                                         break;
4888                                 } else if (pf->veb[v]->uplink_seid == 0) {
4889                                         dev_info(&pf->pdev->dev,
4890                                                  "rebuild of orphan VEB failed: %d\n",
4891                                                  ret);
4892                                 }
4893                         }
4894                 }
4895         }
4896
4897         if (pf->vsi[pf->lan_vsi]->uplink_seid == pf->mac_seid) {
4898                 dev_info(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
4899                 /* no VEB, so rebuild only the Main VSI */
4900                 ret = i40e_add_vsi(pf->vsi[pf->lan_vsi]);
4901                 if (ret) {
4902                         dev_info(&pf->pdev->dev,
4903                                  "rebuild of Main VSI failed: %d\n", ret);
4904                         goto end_core_reset;
4905                 }
4906         }
4907
4908         /* reinit the misc interrupt */
4909         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
4910                 ret = i40e_setup_misc_vector(pf);
4911
4912         /* restart the VSIs that were rebuilt and running before the reset */
4913         i40e_pf_unquiesce_all_vsi(pf);
4914
4915         /* tell the firmware that we're starting */
4916         dv.major_version = DRV_VERSION_MAJOR;
4917         dv.minor_version = DRV_VERSION_MINOR;
4918         dv.build_version = DRV_VERSION_BUILD;
4919         dv.subbuild_version = 0;
4920         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
4921
4922         dev_info(&pf->pdev->dev, "PF reset done\n");
4923
4924 end_core_reset:
4925         clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
4926 }
4927
4928 /**
4929  * i40e_handle_reset_warning - prep for the pf to reset, reset and rebuild
4930  * @pf: board private structure
4931  *
4932  * Close up the VFs and other things in prep for a Core Reset,
4933  * then get ready to rebuild the world.
4934  **/
4935 static void i40e_handle_reset_warning(struct i40e_pf *pf)
4936 {
4937         i40e_status ret;
4938
4939         ret = i40e_prep_for_reset(pf);
4940         if (!ret)
4941                 i40e_reset_and_rebuild(pf, false);
4942 }
4943
4944 /**
4945  * i40e_handle_mdd_event
4946  * @pf: pointer to the pf structure
4947  *
4948  * Called from the MDD irq handler to identify possibly malicious vfs
4949  **/
4950 static void i40e_handle_mdd_event(struct i40e_pf *pf)
4951 {
4952         struct i40e_hw *hw = &pf->hw;
4953         bool mdd_detected = false;
4954         struct i40e_vf *vf;
4955         u32 reg;
4956         int i;
4957
4958         if (!test_bit(__I40E_MDD_EVENT_PENDING, &pf->state))
4959                 return;
4960
4961         /* find what triggered the MDD event */
4962         reg = rd32(hw, I40E_GL_MDET_TX);
4963         if (reg & I40E_GL_MDET_TX_VALID_MASK) {
4964                 u8 func = (reg & I40E_GL_MDET_TX_FUNCTION_MASK)
4965                                 >> I40E_GL_MDET_TX_FUNCTION_SHIFT;
4966                 u8 event = (reg & I40E_GL_MDET_TX_EVENT_SHIFT)
4967                                 >> I40E_GL_MDET_TX_EVENT_SHIFT;
4968                 u8 queue = (reg & I40E_GL_MDET_TX_QUEUE_MASK)
4969                                 >> I40E_GL_MDET_TX_QUEUE_SHIFT;
4970                 dev_info(&pf->pdev->dev,
4971                          "Malicious Driver Detection TX event 0x%02x on q %d of function 0x%02x\n",
4972                          event, queue, func);
4973                 wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
4974                 mdd_detected = true;
4975         }
4976         reg = rd32(hw, I40E_GL_MDET_RX);
4977         if (reg & I40E_GL_MDET_RX_VALID_MASK) {
4978                 u8 func = (reg & I40E_GL_MDET_RX_FUNCTION_MASK)
4979                                 >> I40E_GL_MDET_RX_FUNCTION_SHIFT;
4980                 u8 event = (reg & I40E_GL_MDET_RX_EVENT_SHIFT)
4981                                 >> I40E_GL_MDET_RX_EVENT_SHIFT;
4982                 u8 queue = (reg & I40E_GL_MDET_RX_QUEUE_MASK)
4983                                 >> I40E_GL_MDET_RX_QUEUE_SHIFT;
4984                 dev_info(&pf->pdev->dev,
4985                          "Malicious Driver Detection RX event 0x%02x on q %d of function 0x%02x\n",
4986                          event, queue, func);
4987                 wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
4988                 mdd_detected = true;
4989         }
4990
4991         /* see if one of the VFs needs its hand slapped */
4992         for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
4993                 vf = &(pf->vf[i]);
4994                 reg = rd32(hw, I40E_VP_MDET_TX(i));
4995                 if (reg & I40E_VP_MDET_TX_VALID_MASK) {
4996                         wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
4997                         vf->num_mdd_events++;
4998                         dev_info(&pf->pdev->dev, "MDD TX event on VF %d\n", i);
4999                 }
5000
5001                 reg = rd32(hw, I40E_VP_MDET_RX(i));
5002                 if (reg & I40E_VP_MDET_RX_VALID_MASK) {
5003                         wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
5004                         vf->num_mdd_events++;
5005                         dev_info(&pf->pdev->dev, "MDD RX event on VF %d\n", i);
5006                 }
5007
5008                 if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
5009                         dev_info(&pf->pdev->dev,
5010                                  "Too many MDD events on VF %d, disabled\n", i);
5011                         dev_info(&pf->pdev->dev,
5012                                  "Use PF Control I/F to re-enable the VF\n");
5013                         set_bit(I40E_VF_STAT_DISABLED, &vf->vf_states);
5014                 }
5015         }
5016
5017         /* re-enable mdd interrupt cause */
5018         clear_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
5019         reg = rd32(hw, I40E_PFINT_ICR0_ENA);
5020         reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
5021         wr32(hw, I40E_PFINT_ICR0_ENA, reg);
5022         i40e_flush(hw);
5023 }
5024
5025 #ifdef CONFIG_I40E_VXLAN
5026 /**
5027  * i40e_sync_vxlan_filters_subtask - Sync the VSI filter list with HW
5028  * @pf: board private structure
5029  **/
5030 static void i40e_sync_vxlan_filters_subtask(struct i40e_pf *pf)
5031 {
5032         const int vxlan_hdr_qwords = 4;
5033         struct i40e_hw *hw = &pf->hw;
5034         i40e_status ret;
5035         u8 filter_index;
5036         __be16 port;
5037         int i;
5038
5039         if (!(pf->flags & I40E_FLAG_VXLAN_FILTER_SYNC))
5040                 return;
5041
5042         pf->flags &= ~I40E_FLAG_VXLAN_FILTER_SYNC;
5043
5044         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
5045                 if (pf->pending_vxlan_bitmap & (1 << i)) {
5046                         pf->pending_vxlan_bitmap &= ~(1 << i);
5047                         port = pf->vxlan_ports[i];
5048                         ret = port ?
5049                               i40e_aq_add_udp_tunnel(hw, ntohs(port),
5050                                                      vxlan_hdr_qwords,
5051                                                      I40E_AQC_TUNNEL_TYPE_VXLAN,
5052                                                      &filter_index, NULL)
5053                               : i40e_aq_del_udp_tunnel(hw, i, NULL);
5054
5055                         if (ret) {
5056                                 dev_info(&pf->pdev->dev, "Failed to execute AQ command for %s port %d with index %d\n",
5057                                          port ? "adding" : "deleting",
5058                                          ntohs(port), port ? i : i);
5059
5060                                 pf->vxlan_ports[i] = 0;
5061                         } else {
5062                                 dev_info(&pf->pdev->dev, "%s port %d with AQ command with index %d\n",
5063                                          port ? "Added" : "Deleted",
5064                                          ntohs(port), port ? i : filter_index);
5065                         }
5066                 }
5067         }
5068 }
5069
5070 #endif
5071 /**
5072  * i40e_service_task - Run the driver's async subtasks
5073  * @work: pointer to work_struct containing our data
5074  **/
5075 static void i40e_service_task(struct work_struct *work)
5076 {
5077         struct i40e_pf *pf = container_of(work,
5078                                           struct i40e_pf,
5079                                           service_task);
5080         unsigned long start_time = jiffies;
5081
5082         i40e_reset_subtask(pf);
5083         i40e_handle_mdd_event(pf);
5084         i40e_vc_process_vflr_event(pf);
5085         i40e_watchdog_subtask(pf);
5086         i40e_fdir_reinit_subtask(pf);
5087         i40e_check_hang_subtask(pf);
5088         i40e_sync_filters_subtask(pf);
5089 #ifdef CONFIG_I40E_VXLAN
5090         i40e_sync_vxlan_filters_subtask(pf);
5091 #endif
5092         i40e_clean_adminq_subtask(pf);
5093
5094         i40e_service_event_complete(pf);
5095
5096         /* If the tasks have taken longer than one timer cycle or there
5097          * is more work to be done, reschedule the service task now
5098          * rather than wait for the timer to tick again.
5099          */
5100         if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
5101             test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state)            ||
5102             test_bit(__I40E_MDD_EVENT_PENDING, &pf->state)               ||
5103             test_bit(__I40E_VFLR_EVENT_PENDING, &pf->state))
5104                 i40e_service_event_schedule(pf);
5105 }
5106
5107 /**
5108  * i40e_service_timer - timer callback
5109  * @data: pointer to PF struct
5110  **/
5111 static void i40e_service_timer(unsigned long data)
5112 {
5113         struct i40e_pf *pf = (struct i40e_pf *)data;
5114
5115         mod_timer(&pf->service_timer,
5116                   round_jiffies(jiffies + pf->service_timer_period));
5117         i40e_service_event_schedule(pf);
5118 }
5119
5120 /**
5121  * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
5122  * @vsi: the VSI being configured
5123  **/
5124 static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
5125 {
5126         struct i40e_pf *pf = vsi->back;
5127
5128         switch (vsi->type) {
5129         case I40E_VSI_MAIN:
5130                 vsi->alloc_queue_pairs = pf->num_lan_qps;
5131                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5132                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5133                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5134                         vsi->num_q_vectors = pf->num_lan_msix;
5135                 else
5136                         vsi->num_q_vectors = 1;
5137
5138                 break;
5139
5140         case I40E_VSI_FDIR:
5141                 vsi->alloc_queue_pairs = 1;
5142                 vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
5143                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5144                 vsi->num_q_vectors = 1;
5145                 break;
5146
5147         case I40E_VSI_VMDQ2:
5148                 vsi->alloc_queue_pairs = pf->num_vmdq_qps;
5149                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5150                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5151                 vsi->num_q_vectors = pf->num_vmdq_msix;
5152                 break;
5153
5154         case I40E_VSI_SRIOV:
5155                 vsi->alloc_queue_pairs = pf->num_vf_qps;
5156                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5157                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5158                 break;
5159
5160         default:
5161                 WARN_ON(1);
5162                 return -ENODATA;
5163         }
5164
5165         return 0;
5166 }
5167
5168 /**
5169  * i40e_vsi_alloc_arrays - Allocate queue and vector pointer arrays for the vsi
5170  * @type: VSI pointer
5171  * @alloc_qvectors: a bool to specify if q_vectors need to be allocated.
5172  *
5173  * On error: returns error code (negative)
5174  * On success: returns 0
5175  **/
5176 static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
5177 {
5178         int size;
5179         int ret = 0;
5180
5181         /* allocate memory for both Tx and Rx ring pointers */
5182         size = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs * 2;
5183         vsi->tx_rings = kzalloc(size, GFP_KERNEL);
5184         if (!vsi->tx_rings)
5185                 return -ENOMEM;
5186         vsi->rx_rings = &vsi->tx_rings[vsi->alloc_queue_pairs];
5187
5188         if (alloc_qvectors) {
5189                 /* allocate memory for q_vector pointers */
5190                 size = sizeof(struct i40e_q_vectors *) * vsi->num_q_vectors;
5191                 vsi->q_vectors = kzalloc(size, GFP_KERNEL);
5192                 if (!vsi->q_vectors) {
5193                         ret = -ENOMEM;
5194                         goto err_vectors;
5195                 }
5196         }
5197         return ret;
5198
5199 err_vectors:
5200         kfree(vsi->tx_rings);
5201         return ret;
5202 }
5203
5204 /**
5205  * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
5206  * @pf: board private structure
5207  * @type: type of VSI
5208  *
5209  * On error: returns error code (negative)
5210  * On success: returns vsi index in PF (positive)
5211  **/
5212 static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
5213 {
5214         int ret = -ENODEV;
5215         struct i40e_vsi *vsi;
5216         int vsi_idx;
5217         int i;
5218
5219         /* Need to protect the allocation of the VSIs at the PF level */
5220         mutex_lock(&pf->switch_mutex);
5221
5222         /* VSI list may be fragmented if VSI creation/destruction has
5223          * been happening.  We can afford to do a quick scan to look
5224          * for any free VSIs in the list.
5225          *
5226          * find next empty vsi slot, looping back around if necessary
5227          */
5228         i = pf->next_vsi;
5229         while (i < pf->hw.func_caps.num_vsis && pf->vsi[i])
5230                 i++;
5231         if (i >= pf->hw.func_caps.num_vsis) {
5232                 i = 0;
5233                 while (i < pf->next_vsi && pf->vsi[i])
5234                         i++;
5235         }
5236
5237         if (i < pf->hw.func_caps.num_vsis && !pf->vsi[i]) {
5238                 vsi_idx = i;             /* Found one! */
5239         } else {
5240                 ret = -ENODEV;
5241                 goto unlock_pf;  /* out of VSI slots! */
5242         }
5243         pf->next_vsi = ++i;
5244
5245         vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
5246         if (!vsi) {
5247                 ret = -ENOMEM;
5248                 goto unlock_pf;
5249         }
5250         vsi->type = type;
5251         vsi->back = pf;
5252         set_bit(__I40E_DOWN, &vsi->state);
5253         vsi->flags = 0;
5254         vsi->idx = vsi_idx;
5255         vsi->rx_itr_setting = pf->rx_itr_default;
5256         vsi->tx_itr_setting = pf->tx_itr_default;
5257         vsi->netdev_registered = false;
5258         vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
5259         INIT_LIST_HEAD(&vsi->mac_filter_list);
5260
5261         ret = i40e_set_num_rings_in_vsi(vsi);
5262         if (ret)
5263                 goto err_rings;
5264
5265         ret = i40e_vsi_alloc_arrays(vsi, true);
5266         if (ret)
5267                 goto err_rings;
5268
5269         /* Setup default MSIX irq handler for VSI */
5270         i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);
5271
5272         pf->vsi[vsi_idx] = vsi;
5273         ret = vsi_idx;
5274         goto unlock_pf;
5275
5276 err_rings:
5277         pf->next_vsi = i - 1;
5278         kfree(vsi);
5279 unlock_pf:
5280         mutex_unlock(&pf->switch_mutex);
5281         return ret;
5282 }
5283
5284 /**
5285  * i40e_vsi_free_arrays - Free queue and vector pointer arrays for the VSI
5286  * @type: VSI pointer
5287  * @free_qvectors: a bool to specify if q_vectors need to be freed.
5288  *
5289  * On error: returns error code (negative)
5290  * On success: returns 0
5291  **/
5292 static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
5293 {
5294         /* free the ring and vector containers */
5295         if (free_qvectors) {
5296                 kfree(vsi->q_vectors);
5297                 vsi->q_vectors = NULL;
5298         }
5299         kfree(vsi->tx_rings);
5300         vsi->tx_rings = NULL;
5301         vsi->rx_rings = NULL;
5302 }
5303
5304 /**
5305  * i40e_vsi_clear - Deallocate the VSI provided
5306  * @vsi: the VSI being un-configured
5307  **/
5308 static int i40e_vsi_clear(struct i40e_vsi *vsi)
5309 {
5310         struct i40e_pf *pf;
5311
5312         if (!vsi)
5313                 return 0;
5314
5315         if (!vsi->back)
5316                 goto free_vsi;
5317         pf = vsi->back;
5318
5319         mutex_lock(&pf->switch_mutex);
5320         if (!pf->vsi[vsi->idx]) {
5321                 dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](%p,type %d)\n",
5322                         vsi->idx, vsi->idx, vsi, vsi->type);
5323                 goto unlock_vsi;
5324         }
5325
5326         if (pf->vsi[vsi->idx] != vsi) {
5327                 dev_err(&pf->pdev->dev,
5328                         "pf->vsi[%d](%p, type %d) != vsi[%d](%p,type %d): no free!\n",
5329                         pf->vsi[vsi->idx]->idx,
5330                         pf->vsi[vsi->idx],
5331                         pf->vsi[vsi->idx]->type,
5332                         vsi->idx, vsi, vsi->type);
5333                 goto unlock_vsi;
5334         }
5335
5336         /* updates the pf for this cleared vsi */
5337         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
5338         i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);
5339
5340         i40e_vsi_free_arrays(vsi, true);
5341
5342         pf->vsi[vsi->idx] = NULL;
5343         if (vsi->idx < pf->next_vsi)
5344                 pf->next_vsi = vsi->idx;
5345
5346 unlock_vsi:
5347         mutex_unlock(&pf->switch_mutex);
5348 free_vsi:
5349         kfree(vsi);
5350
5351         return 0;
5352 }
5353
5354 /**
5355  * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
5356  * @vsi: the VSI being cleaned
5357  **/
5358 static void i40e_vsi_clear_rings(struct i40e_vsi *vsi)
5359 {
5360         int i;
5361
5362         if (vsi->tx_rings && vsi->tx_rings[0]) {
5363                 for (i = 0; i < vsi->alloc_queue_pairs; i++) {
5364                         kfree_rcu(vsi->tx_rings[i], rcu);
5365                         vsi->tx_rings[i] = NULL;
5366                         vsi->rx_rings[i] = NULL;
5367                 }
5368         }
5369 }
5370
5371 /**
5372  * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
5373  * @vsi: the VSI being configured
5374  **/
5375 static int i40e_alloc_rings(struct i40e_vsi *vsi)
5376 {
5377         struct i40e_pf *pf = vsi->back;
5378         int i;
5379
5380         /* Set basic values in the rings to be used later during open() */
5381         for (i = 0; i < vsi->alloc_queue_pairs; i++) {
5382                 struct i40e_ring *tx_ring;
5383                 struct i40e_ring *rx_ring;
5384
5385                 /* allocate space for both Tx and Rx in one shot */
5386                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
5387                 if (!tx_ring)
5388                         goto err_out;
5389
5390                 tx_ring->queue_index = i;
5391                 tx_ring->reg_idx = vsi->base_queue + i;
5392                 tx_ring->ring_active = false;
5393                 tx_ring->vsi = vsi;
5394                 tx_ring->netdev = vsi->netdev;
5395                 tx_ring->dev = &pf->pdev->dev;
5396                 tx_ring->count = vsi->num_desc;
5397                 tx_ring->size = 0;
5398                 tx_ring->dcb_tc = 0;
5399                 vsi->tx_rings[i] = tx_ring;
5400
5401                 rx_ring = &tx_ring[1];
5402                 rx_ring->queue_index = i;
5403                 rx_ring->reg_idx = vsi->base_queue + i;
5404                 rx_ring->ring_active = false;
5405                 rx_ring->vsi = vsi;
5406                 rx_ring->netdev = vsi->netdev;
5407                 rx_ring->dev = &pf->pdev->dev;
5408                 rx_ring->count = vsi->num_desc;
5409                 rx_ring->size = 0;
5410                 rx_ring->dcb_tc = 0;
5411                 if (pf->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED)
5412                         set_ring_16byte_desc_enabled(rx_ring);
5413                 else
5414                         clear_ring_16byte_desc_enabled(rx_ring);
5415                 vsi->rx_rings[i] = rx_ring;
5416         }
5417
5418         return 0;
5419
5420 err_out:
5421         i40e_vsi_clear_rings(vsi);
5422         return -ENOMEM;
5423 }
5424
5425 /**
5426  * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
5427  * @pf: board private structure
5428  * @vectors: the number of MSI-X vectors to request
5429  *
5430  * Returns the number of vectors reserved, or error
5431  **/
5432 static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
5433 {
5434         int err = 0;
5435
5436         pf->num_msix_entries = 0;
5437         while (vectors >= I40E_MIN_MSIX) {
5438                 err = pci_enable_msix(pf->pdev, pf->msix_entries, vectors);
5439                 if (err == 0) {
5440                         /* good to go */
5441                         pf->num_msix_entries = vectors;
5442                         break;
5443                 } else if (err < 0) {
5444                         /* total failure */
5445                         dev_info(&pf->pdev->dev,
5446                                  "MSI-X vector reservation failed: %d\n", err);
5447                         vectors = 0;
5448                         break;
5449                 } else {
5450                         /* err > 0 is the hint for retry */
5451                         dev_info(&pf->pdev->dev,
5452                                  "MSI-X vectors wanted %d, retrying with %d\n",
5453                                  vectors, err);
5454                         vectors = err;
5455                 }
5456         }
5457
5458         if (vectors > 0 && vectors < I40E_MIN_MSIX) {
5459                 dev_info(&pf->pdev->dev,
5460                          "Couldn't get enough vectors, only %d available\n",
5461                          vectors);
5462                 vectors = 0;
5463         }
5464
5465         return vectors;
5466 }
5467
5468 /**
5469  * i40e_init_msix - Setup the MSIX capability
5470  * @pf: board private structure
5471  *
5472  * Work with the OS to set up the MSIX vectors needed.
5473  *
5474  * Returns 0 on success, negative on failure
5475  **/
5476 static int i40e_init_msix(struct i40e_pf *pf)
5477 {
5478         i40e_status err = 0;
5479         struct i40e_hw *hw = &pf->hw;
5480         int v_budget, i;
5481         int vec;
5482
5483         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
5484                 return -ENODEV;
5485
5486         /* The number of vectors we'll request will be comprised of:
5487          *   - Add 1 for "other" cause for Admin Queue events, etc.
5488          *   - The number of LAN queue pairs
5489          *      - Queues being used for RSS.
5490          *              We don't need as many as max_rss_size vectors.
5491          *              use rss_size instead in the calculation since that
5492          *              is governed by number of cpus in the system.
5493          *      - assumes symmetric Tx/Rx pairing
5494          *   - The number of VMDq pairs
5495          * Once we count this up, try the request.
5496          *
5497          * If we can't get what we want, we'll simplify to nearly nothing
5498          * and try again.  If that still fails, we punt.
5499          */
5500         pf->num_lan_msix = pf->num_lan_qps - (pf->rss_size_max - pf->rss_size);
5501         pf->num_vmdq_msix = pf->num_vmdq_qps;
5502         v_budget = 1 + pf->num_lan_msix;
5503         v_budget += (pf->num_vmdq_vsis * pf->num_vmdq_msix);
5504         if (pf->flags & I40E_FLAG_FDIR_ENABLED)
5505                 v_budget++;
5506
5507         /* Scale down if necessary, and the rings will share vectors */
5508         v_budget = min_t(int, v_budget, hw->func_caps.num_msix_vectors);
5509
5510         pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
5511                                    GFP_KERNEL);
5512         if (!pf->msix_entries)
5513                 return -ENOMEM;
5514
5515         for (i = 0; i < v_budget; i++)
5516                 pf->msix_entries[i].entry = i;
5517         vec = i40e_reserve_msix_vectors(pf, v_budget);
5518         if (vec < I40E_MIN_MSIX) {
5519                 pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
5520                 kfree(pf->msix_entries);
5521                 pf->msix_entries = NULL;
5522                 return -ENODEV;
5523
5524         } else if (vec == I40E_MIN_MSIX) {
5525                 /* Adjust for minimal MSIX use */
5526                 dev_info(&pf->pdev->dev, "Features disabled, not enough MSIX vectors\n");
5527                 pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
5528                 pf->num_vmdq_vsis = 0;
5529                 pf->num_vmdq_qps = 0;
5530                 pf->num_vmdq_msix = 0;
5531                 pf->num_lan_qps = 1;
5532                 pf->num_lan_msix = 1;
5533
5534         } else if (vec != v_budget) {
5535                 /* Scale vector usage down */
5536                 pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
5537                 vec--;                    /* reserve the misc vector */
5538
5539                 /* partition out the remaining vectors */
5540                 switch (vec) {
5541                 case 2:
5542                         pf->num_vmdq_vsis = 1;
5543                         pf->num_lan_msix = 1;
5544                         break;
5545                 case 3:
5546                         pf->num_vmdq_vsis = 1;
5547                         pf->num_lan_msix = 2;
5548                         break;
5549                 default:
5550                         pf->num_lan_msix = min_t(int, (vec / 2),
5551                                                  pf->num_lan_qps);
5552                         pf->num_vmdq_vsis = min_t(int, (vec - pf->num_lan_msix),
5553                                                   I40E_DEFAULT_NUM_VMDQ_VSI);
5554                         break;
5555                 }
5556         }
5557
5558         return err;
5559 }
5560
5561 /**
5562  * i40e_alloc_q_vector - Allocate memory for a single interrupt vector
5563  * @vsi: the VSI being configured
5564  * @v_idx: index of the vector in the vsi struct
5565  *
5566  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
5567  **/
5568 static int i40e_alloc_q_vector(struct i40e_vsi *vsi, int v_idx)
5569 {
5570         struct i40e_q_vector *q_vector;
5571
5572         /* allocate q_vector */
5573         q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
5574         if (!q_vector)
5575                 return -ENOMEM;
5576
5577         q_vector->vsi = vsi;
5578         q_vector->v_idx = v_idx;
5579         cpumask_set_cpu(v_idx, &q_vector->affinity_mask);
5580         if (vsi->netdev)
5581                 netif_napi_add(vsi->netdev, &q_vector->napi,
5582                                i40e_napi_poll, vsi->work_limit);
5583
5584         q_vector->rx.latency_range = I40E_LOW_LATENCY;
5585         q_vector->tx.latency_range = I40E_LOW_LATENCY;
5586
5587         /* tie q_vector and vsi together */
5588         vsi->q_vectors[v_idx] = q_vector;
5589
5590         return 0;
5591 }
5592
5593 /**
5594  * i40e_alloc_q_vectors - Allocate memory for interrupt vectors
5595  * @vsi: the VSI being configured
5596  *
5597  * We allocate one q_vector per queue interrupt.  If allocation fails we
5598  * return -ENOMEM.
5599  **/
5600 static int i40e_alloc_q_vectors(struct i40e_vsi *vsi)
5601 {
5602         struct i40e_pf *pf = vsi->back;
5603         int v_idx, num_q_vectors;
5604         int err;
5605
5606         /* if not MSIX, give the one vector only to the LAN VSI */
5607         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5608                 num_q_vectors = vsi->num_q_vectors;
5609         else if (vsi == pf->vsi[pf->lan_vsi])
5610                 num_q_vectors = 1;
5611         else
5612                 return -EINVAL;
5613
5614         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
5615                 err = i40e_alloc_q_vector(vsi, v_idx);
5616                 if (err)
5617                         goto err_out;
5618         }
5619
5620         return 0;
5621
5622 err_out:
5623         while (v_idx--)
5624                 i40e_free_q_vector(vsi, v_idx);
5625
5626         return err;
5627 }
5628
5629 /**
5630  * i40e_init_interrupt_scheme - Determine proper interrupt scheme
5631  * @pf: board private structure to initialize
5632  **/
5633 static void i40e_init_interrupt_scheme(struct i40e_pf *pf)
5634 {
5635         int err = 0;
5636
5637         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
5638                 err = i40e_init_msix(pf);
5639                 if (err) {
5640                         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED      |
5641                                         I40E_FLAG_RSS_ENABLED      |
5642                                         I40E_FLAG_DCB_ENABLED      |
5643                                         I40E_FLAG_SRIOV_ENABLED    |
5644                                         I40E_FLAG_FDIR_ENABLED     |
5645                                         I40E_FLAG_FDIR_ATR_ENABLED |
5646                                         I40E_FLAG_VMDQ_ENABLED);
5647
5648                         /* rework the queue expectations without MSIX */
5649                         i40e_determine_queue_usage(pf);
5650                 }
5651         }
5652
5653         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED) &&
5654             (pf->flags & I40E_FLAG_MSI_ENABLED)) {
5655                 dev_info(&pf->pdev->dev, "MSIX not available, trying MSI\n");
5656                 err = pci_enable_msi(pf->pdev);
5657                 if (err) {
5658                         dev_info(&pf->pdev->dev, "MSI init failed - %d\n", err);
5659                         pf->flags &= ~I40E_FLAG_MSI_ENABLED;
5660                 }
5661         }
5662
5663         if (!(pf->flags & (I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED)))
5664                 dev_info(&pf->pdev->dev, "MSIX and MSI not available, falling back to Legacy IRQ\n");
5665
5666         /* track first vector for misc interrupts */
5667         err = i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT-1);
5668 }
5669
5670 /**
5671  * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
5672  * @pf: board private structure
5673  *
5674  * This sets up the handler for MSIX 0, which is used to manage the
5675  * non-queue interrupts, e.g. AdminQ and errors.  This is not used
5676  * when in MSI or Legacy interrupt mode.
5677  **/
5678 static int i40e_setup_misc_vector(struct i40e_pf *pf)
5679 {
5680         struct i40e_hw *hw = &pf->hw;
5681         int err = 0;
5682
5683         /* Only request the irq if this is the first time through, and
5684          * not when we're rebuilding after a Reset
5685          */
5686         if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
5687                 err = request_irq(pf->msix_entries[0].vector,
5688                                   i40e_intr, 0, pf->misc_int_name, pf);
5689                 if (err) {
5690                         dev_info(&pf->pdev->dev,
5691                                  "request_irq for msix_misc failed: %d\n", err);
5692                         return -EFAULT;
5693                 }
5694         }
5695
5696         i40e_enable_misc_int_causes(hw);
5697
5698         /* associate no queues to the misc vector */
5699         wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
5700         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K);
5701
5702         i40e_flush(hw);
5703
5704         i40e_irq_dynamic_enable_icr0(pf);
5705
5706         return err;
5707 }
5708
5709 /**
5710  * i40e_config_rss - Prepare for RSS if used
5711  * @pf: board private structure
5712  **/
5713 static int i40e_config_rss(struct i40e_pf *pf)
5714 {
5715         /* Set of random keys generated using kernel random number generator */
5716         static const u32 seed[I40E_PFQF_HKEY_MAX_INDEX + 1] = {0x41b01687,
5717                                 0x183cfd8c, 0xce880440, 0x580cbc3c, 0x35897377,
5718                                 0x328b25e1, 0x4fa98922, 0xb7d90c14, 0xd5bad70d,
5719                                 0xcd15a2c1, 0xe8580225, 0x4a1e9d11, 0xfe5731be};
5720         struct i40e_hw *hw = &pf->hw;
5721         u32 lut = 0;
5722         int i, j;
5723         u64 hena;
5724
5725         /* Fill out hash function seed */
5726         for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
5727                 wr32(hw, I40E_PFQF_HKEY(i), seed[i]);
5728
5729         /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
5730         hena = (u64)rd32(hw, I40E_PFQF_HENA(0)) |
5731                 ((u64)rd32(hw, I40E_PFQF_HENA(1)) << 32);
5732         hena |= I40E_DEFAULT_RSS_HENA;
5733         wr32(hw, I40E_PFQF_HENA(0), (u32)hena);
5734         wr32(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
5735
5736         /* Populate the LUT with max no. of queues in round robin fashion */
5737         for (i = 0, j = 0; i < pf->hw.func_caps.rss_table_size; i++, j++) {
5738
5739                 /* The assumption is that lan qp count will be the highest
5740                  * qp count for any PF VSI that needs RSS.
5741                  * If multiple VSIs need RSS support, all the qp counts
5742                  * for those VSIs should be a power of 2 for RSS to work.
5743                  * If LAN VSI is the only consumer for RSS then this requirement
5744                  * is not necessary.
5745                  */
5746                 if (j == pf->rss_size)
5747                         j = 0;
5748                 /* lut = 4-byte sliding window of 4 lut entries */
5749                 lut = (lut << 8) | (j &
5750                          ((0x1 << pf->hw.func_caps.rss_table_entry_width) - 1));
5751                 /* On i = 3, we have 4 entries in lut; write to the register */
5752                 if ((i & 3) == 3)
5753                         wr32(hw, I40E_PFQF_HLUT(i >> 2), lut);
5754         }
5755         i40e_flush(hw);
5756
5757         return 0;
5758 }
5759
5760 /**
5761  * i40e_reconfig_rss_queues - change number of queues for rss and rebuild
5762  * @pf: board private structure
5763  * @queue_count: the requested queue count for rss.
5764  *
5765  * returns 0 if rss is not enabled, if enabled returns the final rss queue
5766  * count which may be different from the requested queue count.
5767  **/
5768 int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
5769 {
5770         if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
5771                 return 0;
5772
5773         queue_count = min_t(int, queue_count, pf->rss_size_max);
5774         queue_count = rounddown_pow_of_two(queue_count);
5775
5776         if (queue_count != pf->rss_size) {
5777                 i40e_prep_for_reset(pf);
5778
5779                 pf->rss_size = queue_count;
5780
5781                 i40e_reset_and_rebuild(pf, true);
5782                 i40e_config_rss(pf);
5783         }
5784         dev_info(&pf->pdev->dev, "RSS count:  %d\n", pf->rss_size);
5785         return pf->rss_size;
5786 }
5787
5788 /**
5789  * i40e_sw_init - Initialize general software structures (struct i40e_pf)
5790  * @pf: board private structure to initialize
5791  *
5792  * i40e_sw_init initializes the Adapter private data structure.
5793  * Fields are initialized based on PCI device information and
5794  * OS network device settings (MTU size).
5795  **/
5796 static int i40e_sw_init(struct i40e_pf *pf)
5797 {
5798         int err = 0;
5799         int size;
5800
5801         pf->msg_enable = netif_msg_init(I40E_DEFAULT_MSG_ENABLE,
5802                                 (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK));
5803         pf->hw.debug_mask = pf->msg_enable | I40E_DEBUG_DIAG;
5804         if (debug != -1 && debug != I40E_DEFAULT_MSG_ENABLE) {
5805                 if (I40E_DEBUG_USER & debug)
5806                         pf->hw.debug_mask = debug;
5807                 pf->msg_enable = netif_msg_init((debug & ~I40E_DEBUG_USER),
5808                                                 I40E_DEFAULT_MSG_ENABLE);
5809         }
5810
5811         /* Set default capability flags */
5812         pf->flags = I40E_FLAG_RX_CSUM_ENABLED |
5813                     I40E_FLAG_MSI_ENABLED     |
5814                     I40E_FLAG_MSIX_ENABLED    |
5815                     I40E_FLAG_RX_1BUF_ENABLED;
5816
5817         /* Depending on PF configurations, it is possible that the RSS
5818          * maximum might end up larger than the available queues
5819          */
5820         pf->rss_size_max = 0x1 << pf->hw.func_caps.rss_table_entry_width;
5821         pf->rss_size_max = min_t(int, pf->rss_size_max,
5822                                  pf->hw.func_caps.num_tx_qp);
5823         if (pf->hw.func_caps.rss) {
5824                 pf->flags |= I40E_FLAG_RSS_ENABLED;
5825                 pf->rss_size = min_t(int, pf->rss_size_max, num_online_cpus());
5826         } else {
5827                 pf->rss_size = 1;
5828         }
5829
5830         /* MFP mode enabled */
5831         if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.mfp_mode_1) {
5832                 pf->flags |= I40E_FLAG_MFP_ENABLED;
5833                 dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
5834         }
5835
5836         if (pf->hw.func_caps.dcb)
5837                 pf->num_tc_qps = I40E_DEFAULT_QUEUES_PER_TC;
5838         else
5839                 pf->num_tc_qps = 0;
5840
5841         if (pf->hw.func_caps.fd) {
5842                 /* FW/NVM is not yet fixed in this regard */
5843                 if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
5844                     (pf->hw.func_caps.fd_filters_best_effort > 0)) {
5845                         pf->flags |= I40E_FLAG_FDIR_ATR_ENABLED;
5846                         dev_info(&pf->pdev->dev,
5847                                  "Flow Director ATR mode Enabled\n");
5848                         pf->flags |= I40E_FLAG_FDIR_ENABLED;
5849                         dev_info(&pf->pdev->dev,
5850                                  "Flow Director Side Band mode Enabled\n");
5851                         pf->fdir_pf_filter_count =
5852                                          pf->hw.func_caps.fd_filters_guaranteed;
5853                 }
5854         } else {
5855                 pf->fdir_pf_filter_count = 0;
5856         }
5857
5858         if (pf->hw.func_caps.vmdq) {
5859                 pf->flags |= I40E_FLAG_VMDQ_ENABLED;
5860                 pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
5861                 pf->num_vmdq_qps = I40E_DEFAULT_QUEUES_PER_VMDQ;
5862         }
5863
5864 #ifdef CONFIG_PCI_IOV
5865         if (pf->hw.func_caps.num_vfs) {
5866                 pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
5867                 pf->flags |= I40E_FLAG_SRIOV_ENABLED;
5868                 pf->num_req_vfs = min_t(int,
5869                                         pf->hw.func_caps.num_vfs,
5870                                         I40E_MAX_VF_COUNT);
5871                 dev_info(&pf->pdev->dev,
5872                          "Number of VFs being requested for PF[%d] = %d\n",
5873                          pf->hw.pf_id, pf->num_req_vfs);
5874         }
5875 #endif /* CONFIG_PCI_IOV */
5876         pf->eeprom_version = 0xDEAD;
5877         pf->lan_veb = I40E_NO_VEB;
5878         pf->lan_vsi = I40E_NO_VSI;
5879
5880         /* set up queue assignment tracking */
5881         size = sizeof(struct i40e_lump_tracking)
5882                 + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
5883         pf->qp_pile = kzalloc(size, GFP_KERNEL);
5884         if (!pf->qp_pile) {
5885                 err = -ENOMEM;
5886                 goto sw_init_done;
5887         }
5888         pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;
5889         pf->qp_pile->search_hint = 0;
5890
5891         /* set up vector assignment tracking */
5892         size = sizeof(struct i40e_lump_tracking)
5893                 + (sizeof(u16) * pf->hw.func_caps.num_msix_vectors);
5894         pf->irq_pile = kzalloc(size, GFP_KERNEL);
5895         if (!pf->irq_pile) {
5896                 kfree(pf->qp_pile);
5897                 err = -ENOMEM;
5898                 goto sw_init_done;
5899         }
5900         pf->irq_pile->num_entries = pf->hw.func_caps.num_msix_vectors;
5901         pf->irq_pile->search_hint = 0;
5902
5903         mutex_init(&pf->switch_mutex);
5904
5905 sw_init_done:
5906         return err;
5907 }
5908
5909 /**
5910  * i40e_set_features - set the netdev feature flags
5911  * @netdev: ptr to the netdev being adjusted
5912  * @features: the feature set that the stack is suggesting
5913  **/
5914 static int i40e_set_features(struct net_device *netdev,
5915                              netdev_features_t features)
5916 {
5917         struct i40e_netdev_priv *np = netdev_priv(netdev);
5918         struct i40e_vsi *vsi = np->vsi;
5919
5920         if (features & NETIF_F_HW_VLAN_CTAG_RX)
5921                 i40e_vlan_stripping_enable(vsi);
5922         else
5923                 i40e_vlan_stripping_disable(vsi);
5924
5925         return 0;
5926 }
5927
5928 #ifdef CONFIG_I40E_VXLAN
5929 /**
5930  * i40e_get_vxlan_port_idx - Lookup a possibly offloaded for Rx UDP port
5931  * @pf: board private structure
5932  * @port: The UDP port to look up
5933  *
5934  * Returns the index number or I40E_MAX_PF_UDP_OFFLOAD_PORTS if port not found
5935  **/
5936 static u8 i40e_get_vxlan_port_idx(struct i40e_pf *pf, __be16 port)
5937 {
5938         u8 i;
5939
5940         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
5941                 if (pf->vxlan_ports[i] == port)
5942                         return i;
5943         }
5944
5945         return i;
5946 }
5947
5948 /**
5949  * i40e_add_vxlan_port - Get notifications about VXLAN ports that come up
5950  * @netdev: This physical port's netdev
5951  * @sa_family: Socket Family that VXLAN is notifying us about
5952  * @port: New UDP port number that VXLAN started listening to
5953  **/
5954 static void i40e_add_vxlan_port(struct net_device *netdev,
5955                                 sa_family_t sa_family, __be16 port)
5956 {
5957         struct i40e_netdev_priv *np = netdev_priv(netdev);
5958         struct i40e_vsi *vsi = np->vsi;
5959         struct i40e_pf *pf = vsi->back;
5960         u8 next_idx;
5961         u8 idx;
5962
5963         if (sa_family == AF_INET6)
5964                 return;
5965
5966         idx = i40e_get_vxlan_port_idx(pf, port);
5967
5968         /* Check if port already exists */
5969         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
5970                 netdev_info(netdev, "Port %d already offloaded\n", ntohs(port));
5971                 return;
5972         }
5973
5974         /* Now check if there is space to add the new port */
5975         next_idx = i40e_get_vxlan_port_idx(pf, 0);
5976
5977         if (next_idx == I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
5978                 netdev_info(netdev, "Maximum number of UDP ports reached, not adding port %d\n",
5979                             ntohs(port));
5980                 return;
5981         }
5982
5983         /* New port: add it and mark its index in the bitmap */
5984         pf->vxlan_ports[next_idx] = port;
5985         pf->pending_vxlan_bitmap |= (1 << next_idx);
5986
5987         pf->flags |= I40E_FLAG_VXLAN_FILTER_SYNC;
5988 }
5989
5990 /**
5991  * i40e_del_vxlan_port - Get notifications about VXLAN ports that go away
5992  * @netdev: This physical port's netdev
5993  * @sa_family: Socket Family that VXLAN is notifying us about
5994  * @port: UDP port number that VXLAN stopped listening to
5995  **/
5996 static void i40e_del_vxlan_port(struct net_device *netdev,
5997                                 sa_family_t sa_family, __be16 port)
5998 {
5999         struct i40e_netdev_priv *np = netdev_priv(netdev);
6000         struct i40e_vsi *vsi = np->vsi;
6001         struct i40e_pf *pf = vsi->back;
6002         u8 idx;
6003
6004         if (sa_family == AF_INET6)
6005                 return;
6006
6007         idx = i40e_get_vxlan_port_idx(pf, port);
6008
6009         /* Check if port already exists */
6010         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
6011                 /* if port exists, set it to 0 (mark for deletion)
6012                  * and make it pending
6013                  */
6014                 pf->vxlan_ports[idx] = 0;
6015
6016                 pf->pending_vxlan_bitmap |= (1 << idx);
6017
6018                 pf->flags |= I40E_FLAG_VXLAN_FILTER_SYNC;
6019         } else {
6020                 netdev_warn(netdev, "Port %d was not found, not deleting\n",
6021                             ntohs(port));
6022         }
6023 }
6024
6025 #endif
6026 static const struct net_device_ops i40e_netdev_ops = {
6027         .ndo_open               = i40e_open,
6028         .ndo_stop               = i40e_close,
6029         .ndo_start_xmit         = i40e_lan_xmit_frame,
6030         .ndo_get_stats64        = i40e_get_netdev_stats_struct,
6031         .ndo_set_rx_mode        = i40e_set_rx_mode,
6032         .ndo_validate_addr      = eth_validate_addr,
6033         .ndo_set_mac_address    = i40e_set_mac,
6034         .ndo_change_mtu         = i40e_change_mtu,
6035         .ndo_tx_timeout         = i40e_tx_timeout,
6036         .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
6037         .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
6038 #ifdef CONFIG_NET_POLL_CONTROLLER
6039         .ndo_poll_controller    = i40e_netpoll,
6040 #endif
6041         .ndo_setup_tc           = i40e_setup_tc,
6042         .ndo_set_features       = i40e_set_features,
6043         .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
6044         .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
6045         .ndo_set_vf_tx_rate     = i40e_ndo_set_vf_bw,
6046         .ndo_get_vf_config      = i40e_ndo_get_vf_config,
6047 #ifdef CONFIG_I40E_VXLAN
6048         .ndo_add_vxlan_port     = i40e_add_vxlan_port,
6049         .ndo_del_vxlan_port     = i40e_del_vxlan_port,
6050 #endif
6051 };
6052
6053 /**
6054  * i40e_config_netdev - Setup the netdev flags
6055  * @vsi: the VSI being configured
6056  *
6057  * Returns 0 on success, negative value on failure
6058  **/
6059 static int i40e_config_netdev(struct i40e_vsi *vsi)
6060 {
6061         u8 brdcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
6062         struct i40e_pf *pf = vsi->back;
6063         struct i40e_hw *hw = &pf->hw;
6064         struct i40e_netdev_priv *np;
6065         struct net_device *netdev;
6066         u8 mac_addr[ETH_ALEN];
6067         int etherdev_size;
6068
6069         etherdev_size = sizeof(struct i40e_netdev_priv);
6070         netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
6071         if (!netdev)
6072                 return -ENOMEM;
6073
6074         vsi->netdev = netdev;
6075         np = netdev_priv(netdev);
6076         np->vsi = vsi;
6077
6078         netdev->hw_enc_features = NETIF_F_IP_CSUM        |
6079                                   NETIF_F_GSO_UDP_TUNNEL |
6080                                   NETIF_F_TSO            |
6081                                   NETIF_F_SG;
6082
6083         netdev->features = NETIF_F_SG                  |
6084                            NETIF_F_IP_CSUM             |
6085                            NETIF_F_SCTP_CSUM           |
6086                            NETIF_F_HIGHDMA             |
6087                            NETIF_F_GSO_UDP_TUNNEL      |
6088                            NETIF_F_HW_VLAN_CTAG_TX     |
6089                            NETIF_F_HW_VLAN_CTAG_RX     |
6090                            NETIF_F_HW_VLAN_CTAG_FILTER |
6091                            NETIF_F_IPV6_CSUM           |
6092                            NETIF_F_TSO                 |
6093                            NETIF_F_TSO6                |
6094                            NETIF_F_RXCSUM              |
6095                            NETIF_F_RXHASH              |
6096                            0;
6097
6098         /* copy netdev features into list of user selectable features */
6099         netdev->hw_features |= netdev->features;
6100
6101         if (vsi->type == I40E_VSI_MAIN) {
6102                 SET_NETDEV_DEV(netdev, &pf->pdev->dev);
6103                 memcpy(mac_addr, hw->mac.perm_addr, ETH_ALEN);
6104         } else {
6105                 /* relate the VSI_VMDQ name to the VSI_MAIN name */
6106                 snprintf(netdev->name, IFNAMSIZ, "%sv%%d",
6107                          pf->vsi[pf->lan_vsi]->netdev->name);
6108                 random_ether_addr(mac_addr);
6109                 i40e_add_filter(vsi, mac_addr, I40E_VLAN_ANY, false, false);
6110         }
6111         i40e_add_filter(vsi, brdcast, I40E_VLAN_ANY, false, false);
6112
6113         memcpy(netdev->dev_addr, mac_addr, ETH_ALEN);
6114         memcpy(netdev->perm_addr, mac_addr, ETH_ALEN);
6115         /* vlan gets same features (except vlan offload)
6116          * after any tweaks for specific VSI types
6117          */
6118         netdev->vlan_features = netdev->features & ~(NETIF_F_HW_VLAN_CTAG_TX |
6119                                                      NETIF_F_HW_VLAN_CTAG_RX |
6120                                                    NETIF_F_HW_VLAN_CTAG_FILTER);
6121         netdev->priv_flags |= IFF_UNICAST_FLT;
6122         netdev->priv_flags |= IFF_SUPP_NOFCS;
6123         /* Setup netdev TC information */
6124         i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);
6125
6126         netdev->netdev_ops = &i40e_netdev_ops;
6127         netdev->watchdog_timeo = 5 * HZ;
6128         i40e_set_ethtool_ops(netdev);
6129
6130         return 0;
6131 }
6132
6133 /**
6134  * i40e_vsi_delete - Delete a VSI from the switch
6135  * @vsi: the VSI being removed
6136  *
6137  * Returns 0 on success, negative value on failure
6138  **/
6139 static void i40e_vsi_delete(struct i40e_vsi *vsi)
6140 {
6141         /* remove default VSI is not allowed */
6142         if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
6143                 return;
6144
6145         /* there is no HW VSI for FDIR */
6146         if (vsi->type == I40E_VSI_FDIR)
6147                 return;
6148
6149         i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
6150         return;
6151 }
6152
6153 /**
6154  * i40e_add_vsi - Add a VSI to the switch
6155  * @vsi: the VSI being configured
6156  *
6157  * This initializes a VSI context depending on the VSI type to be added and
6158  * passes it down to the add_vsi aq command.
6159  **/
6160 static int i40e_add_vsi(struct i40e_vsi *vsi)
6161 {
6162         int ret = -ENODEV;
6163         struct i40e_mac_filter *f, *ftmp;
6164         struct i40e_pf *pf = vsi->back;
6165         struct i40e_hw *hw = &pf->hw;
6166         struct i40e_vsi_context ctxt;
6167         u8 enabled_tc = 0x1; /* TC0 enabled */
6168         int f_count = 0;
6169
6170         memset(&ctxt, 0, sizeof(ctxt));
6171         switch (vsi->type) {
6172         case I40E_VSI_MAIN:
6173                 /* The PF's main VSI is already setup as part of the
6174                  * device initialization, so we'll not bother with
6175                  * the add_vsi call, but we will retrieve the current
6176                  * VSI context.
6177                  */
6178                 ctxt.seid = pf->main_vsi_seid;
6179                 ctxt.pf_num = pf->hw.pf_id;
6180                 ctxt.vf_num = 0;
6181                 ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
6182                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6183                 if (ret) {
6184                         dev_info(&pf->pdev->dev,
6185                                  "couldn't get pf vsi config, err %d, aq_err %d\n",
6186                                  ret, pf->hw.aq.asq_last_status);
6187                         return -ENOENT;
6188                 }
6189                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
6190                 vsi->info.valid_sections = 0;
6191
6192                 vsi->seid = ctxt.seid;
6193                 vsi->id = ctxt.vsi_number;
6194
6195                 enabled_tc = i40e_pf_get_tc_map(pf);
6196
6197                 /* MFP mode setup queue map and update VSI */
6198                 if (pf->flags & I40E_FLAG_MFP_ENABLED) {
6199                         memset(&ctxt, 0, sizeof(ctxt));
6200                         ctxt.seid = pf->main_vsi_seid;
6201                         ctxt.pf_num = pf->hw.pf_id;
6202                         ctxt.vf_num = 0;
6203                         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
6204                         ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
6205                         if (ret) {
6206                                 dev_info(&pf->pdev->dev,
6207                                          "update vsi failed, aq_err=%d\n",
6208                                          pf->hw.aq.asq_last_status);
6209                                 ret = -ENOENT;
6210                                 goto err;
6211                         }
6212                         /* update the local VSI info queue map */
6213                         i40e_vsi_update_queue_map(vsi, &ctxt);
6214                         vsi->info.valid_sections = 0;
6215                 } else {
6216                         /* Default/Main VSI is only enabled for TC0
6217                          * reconfigure it to enable all TCs that are
6218                          * available on the port in SFP mode.
6219                          */
6220                         ret = i40e_vsi_config_tc(vsi, enabled_tc);
6221                         if (ret) {
6222                                 dev_info(&pf->pdev->dev,
6223                                          "failed to configure TCs for main VSI tc_map 0x%08x, err %d, aq_err %d\n",
6224                                          enabled_tc, ret,
6225                                          pf->hw.aq.asq_last_status);
6226                                 ret = -ENOENT;
6227                         }
6228                 }
6229                 break;
6230
6231         case I40E_VSI_FDIR:
6232                 /* no queue mapping or actual HW VSI needed */
6233                 vsi->info.valid_sections = 0;
6234                 vsi->seid = 0;
6235                 vsi->id = 0;
6236                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6237                 return 0;
6238                 break;
6239
6240         case I40E_VSI_VMDQ2:
6241                 ctxt.pf_num = hw->pf_id;
6242                 ctxt.vf_num = 0;
6243                 ctxt.uplink_seid = vsi->uplink_seid;
6244                 ctxt.connection_type = 0x1;     /* regular data port */
6245                 ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;
6246
6247                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6248
6249                 /* This VSI is connected to VEB so the switch_id
6250                  * should be set to zero by default.
6251                  */
6252                 ctxt.info.switch_id = 0;
6253                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_LOCAL_LB);
6254                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6255
6256                 /* Setup the VSI tx/rx queue map for TC0 only for now */
6257                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6258                 break;
6259
6260         case I40E_VSI_SRIOV:
6261                 ctxt.pf_num = hw->pf_id;
6262                 ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
6263                 ctxt.uplink_seid = vsi->uplink_seid;
6264                 ctxt.connection_type = 0x1;     /* regular data port */
6265                 ctxt.flags = I40E_AQ_VSI_TYPE_VF;
6266
6267                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6268
6269                 /* This VSI is connected to VEB so the switch_id
6270                  * should be set to zero by default.
6271                  */
6272                 ctxt.info.switch_id = cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6273
6274                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
6275                 ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
6276                 /* Setup the VSI tx/rx queue map for TC0 only for now */
6277                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6278                 break;
6279
6280         default:
6281                 return -ENODEV;
6282         }
6283
6284         if (vsi->type != I40E_VSI_MAIN) {
6285                 ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
6286                 if (ret) {
6287                         dev_info(&vsi->back->pdev->dev,
6288                                  "add vsi failed, aq_err=%d\n",
6289                                  vsi->back->hw.aq.asq_last_status);
6290                         ret = -ENOENT;
6291                         goto err;
6292                 }
6293                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
6294                 vsi->info.valid_sections = 0;
6295                 vsi->seid = ctxt.seid;
6296                 vsi->id = ctxt.vsi_number;
6297         }
6298
6299         /* If macvlan filters already exist, force them to get loaded */
6300         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
6301                 f->changed = true;
6302                 f_count++;
6303         }
6304         if (f_count) {
6305                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
6306                 pf->flags |= I40E_FLAG_FILTER_SYNC;
6307         }
6308
6309         /* Update VSI BW information */
6310         ret = i40e_vsi_get_bw_info(vsi);
6311         if (ret) {
6312                 dev_info(&pf->pdev->dev,
6313                          "couldn't get vsi bw info, err %d, aq_err %d\n",
6314                          ret, pf->hw.aq.asq_last_status);
6315                 /* VSI is already added so not tearing that up */
6316                 ret = 0;
6317         }
6318
6319 err:
6320         return ret;
6321 }
6322
6323 /**
6324  * i40e_vsi_release - Delete a VSI and free its resources
6325  * @vsi: the VSI being removed
6326  *
6327  * Returns 0 on success or < 0 on error
6328  **/
6329 int i40e_vsi_release(struct i40e_vsi *vsi)
6330 {
6331         struct i40e_mac_filter *f, *ftmp;
6332         struct i40e_veb *veb = NULL;
6333         struct i40e_pf *pf;
6334         u16 uplink_seid;
6335         int i, n;
6336
6337         pf = vsi->back;
6338
6339         /* release of a VEB-owner or last VSI is not allowed */
6340         if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
6341                 dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
6342                          vsi->seid, vsi->uplink_seid);
6343                 return -ENODEV;
6344         }
6345         if (vsi == pf->vsi[pf->lan_vsi] &&
6346             !test_bit(__I40E_DOWN, &pf->state)) {
6347                 dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
6348                 return -ENODEV;
6349         }
6350
6351         uplink_seid = vsi->uplink_seid;
6352         if (vsi->type != I40E_VSI_SRIOV) {
6353                 if (vsi->netdev_registered) {
6354                         vsi->netdev_registered = false;
6355                         if (vsi->netdev) {
6356                                 /* results in a call to i40e_close() */
6357                                 unregister_netdev(vsi->netdev);
6358                                 free_netdev(vsi->netdev);
6359                                 vsi->netdev = NULL;
6360                         }
6361                 } else {
6362                         if (!test_and_set_bit(__I40E_DOWN, &vsi->state))
6363                                 i40e_down(vsi);
6364                         i40e_vsi_free_irq(vsi);
6365                         i40e_vsi_free_tx_resources(vsi);
6366                         i40e_vsi_free_rx_resources(vsi);
6367                 }
6368                 i40e_vsi_disable_irq(vsi);
6369         }
6370
6371         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list)
6372                 i40e_del_filter(vsi, f->macaddr, f->vlan,
6373                                 f->is_vf, f->is_netdev);
6374         i40e_sync_vsi_filters(vsi);
6375
6376         i40e_vsi_delete(vsi);
6377         i40e_vsi_free_q_vectors(vsi);
6378         i40e_vsi_clear_rings(vsi);
6379         i40e_vsi_clear(vsi);
6380
6381         /* If this was the last thing on the VEB, except for the
6382          * controlling VSI, remove the VEB, which puts the controlling
6383          * VSI onto the next level down in the switch.
6384          *
6385          * Well, okay, there's one more exception here: don't remove
6386          * the orphan VEBs yet.  We'll wait for an explicit remove request
6387          * from up the network stack.
6388          */
6389         for (n = 0, i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6390                 if (pf->vsi[i] &&
6391                     pf->vsi[i]->uplink_seid == uplink_seid &&
6392                     (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
6393                         n++;      /* count the VSIs */
6394                 }
6395         }
6396         for (i = 0; i < I40E_MAX_VEB; i++) {
6397                 if (!pf->veb[i])
6398                         continue;
6399                 if (pf->veb[i]->uplink_seid == uplink_seid)
6400                         n++;     /* count the VEBs */
6401                 if (pf->veb[i]->seid == uplink_seid)
6402                         veb = pf->veb[i];
6403         }
6404         if (n == 0 && veb && veb->uplink_seid != 0)
6405                 i40e_veb_release(veb);
6406
6407         return 0;
6408 }
6409
6410 /**
6411  * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
6412  * @vsi: ptr to the VSI
6413  *
6414  * This should only be called after i40e_vsi_mem_alloc() which allocates the
6415  * corresponding SW VSI structure and initializes num_queue_pairs for the
6416  * newly allocated VSI.
6417  *
6418  * Returns 0 on success or negative on failure
6419  **/
6420 static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
6421 {
6422         int ret = -ENOENT;
6423         struct i40e_pf *pf = vsi->back;
6424
6425         if (vsi->q_vectors[0]) {
6426                 dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
6427                          vsi->seid);
6428                 return -EEXIST;
6429         }
6430
6431         if (vsi->base_vector) {
6432                 dev_info(&pf->pdev->dev,
6433                          "VSI %d has non-zero base vector %d\n",
6434                          vsi->seid, vsi->base_vector);
6435                 return -EEXIST;
6436         }
6437
6438         ret = i40e_alloc_q_vectors(vsi);
6439         if (ret) {
6440                 dev_info(&pf->pdev->dev,
6441                          "failed to allocate %d q_vector for VSI %d, ret=%d\n",
6442                          vsi->num_q_vectors, vsi->seid, ret);
6443                 vsi->num_q_vectors = 0;
6444                 goto vector_setup_out;
6445         }
6446
6447         if (vsi->num_q_vectors)
6448                 vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
6449                                                  vsi->num_q_vectors, vsi->idx);
6450         if (vsi->base_vector < 0) {
6451                 dev_info(&pf->pdev->dev,
6452                          "failed to get q tracking for VSI %d, err=%d\n",
6453                          vsi->seid, vsi->base_vector);
6454                 i40e_vsi_free_q_vectors(vsi);
6455                 ret = -ENOENT;
6456                 goto vector_setup_out;
6457         }
6458
6459 vector_setup_out:
6460         return ret;
6461 }
6462
6463 /**
6464  * i40e_vsi_reinit_setup - return and reallocate resources for a VSI
6465  * @vsi: pointer to the vsi.
6466  *
6467  * This re-allocates a vsi's queue resources.
6468  *
6469  * Returns pointer to the successfully allocated and configured VSI sw struct
6470  * on success, otherwise returns NULL on failure.
6471  **/
6472 static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
6473 {
6474         struct i40e_pf *pf = vsi->back;
6475         u8 enabled_tc;
6476         int ret;
6477
6478         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
6479         i40e_vsi_clear_rings(vsi);
6480
6481         i40e_vsi_free_arrays(vsi, false);
6482         i40e_set_num_rings_in_vsi(vsi);
6483         ret = i40e_vsi_alloc_arrays(vsi, false);
6484         if (ret)
6485                 goto err_vsi;
6486
6487         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
6488         if (ret < 0) {
6489                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
6490                          vsi->seid, ret);
6491                 goto err_vsi;
6492         }
6493         vsi->base_queue = ret;
6494
6495         /* Update the FW view of the VSI. Force a reset of TC and queue
6496          * layout configurations.
6497          */
6498         enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
6499         pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
6500         pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
6501         i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
6502
6503         /* assign it some queues */
6504         ret = i40e_alloc_rings(vsi);
6505         if (ret)
6506                 goto err_rings;
6507
6508         /* map all of the rings to the q_vectors */
6509         i40e_vsi_map_rings_to_vectors(vsi);
6510         return vsi;
6511
6512 err_rings:
6513         i40e_vsi_free_q_vectors(vsi);
6514         if (vsi->netdev_registered) {
6515                 vsi->netdev_registered = false;
6516                 unregister_netdev(vsi->netdev);
6517                 free_netdev(vsi->netdev);
6518                 vsi->netdev = NULL;
6519         }
6520         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
6521 err_vsi:
6522         i40e_vsi_clear(vsi);
6523         return NULL;
6524 }
6525
6526 /**
6527  * i40e_vsi_setup - Set up a VSI by a given type
6528  * @pf: board private structure
6529  * @type: VSI type
6530  * @uplink_seid: the switch element to link to
6531  * @param1: usage depends upon VSI type. For VF types, indicates VF id
6532  *
6533  * This allocates the sw VSI structure and its queue resources, then add a VSI
6534  * to the identified VEB.
6535  *
6536  * Returns pointer to the successfully allocated and configure VSI sw struct on
6537  * success, otherwise returns NULL on failure.
6538  **/
6539 struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
6540                                 u16 uplink_seid, u32 param1)
6541 {
6542         struct i40e_vsi *vsi = NULL;
6543         struct i40e_veb *veb = NULL;
6544         int ret, i;
6545         int v_idx;
6546
6547         /* The requested uplink_seid must be either
6548          *     - the PF's port seid
6549          *              no VEB is needed because this is the PF
6550          *              or this is a Flow Director special case VSI
6551          *     - seid of an existing VEB
6552          *     - seid of a VSI that owns an existing VEB
6553          *     - seid of a VSI that doesn't own a VEB
6554          *              a new VEB is created and the VSI becomes the owner
6555          *     - seid of the PF VSI, which is what creates the first VEB
6556          *              this is a special case of the previous
6557          *
6558          * Find which uplink_seid we were given and create a new VEB if needed
6559          */
6560         for (i = 0; i < I40E_MAX_VEB; i++) {
6561                 if (pf->veb[i] && pf->veb[i]->seid == uplink_seid) {
6562                         veb = pf->veb[i];
6563                         break;
6564                 }
6565         }
6566
6567         if (!veb && uplink_seid != pf->mac_seid) {
6568
6569                 for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6570                         if (pf->vsi[i] && pf->vsi[i]->seid == uplink_seid) {
6571                                 vsi = pf->vsi[i];
6572                                 break;
6573                         }
6574                 }
6575                 if (!vsi) {
6576                         dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
6577                                  uplink_seid);
6578                         return NULL;
6579                 }
6580
6581                 if (vsi->uplink_seid == pf->mac_seid)
6582                         veb = i40e_veb_setup(pf, 0, pf->mac_seid, vsi->seid,
6583                                              vsi->tc_config.enabled_tc);
6584                 else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
6585                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
6586                                              vsi->tc_config.enabled_tc);
6587
6588                 for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
6589                         if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
6590                                 veb = pf->veb[i];
6591                 }
6592                 if (!veb) {
6593                         dev_info(&pf->pdev->dev, "couldn't add VEB\n");
6594                         return NULL;
6595                 }
6596
6597                 vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
6598                 uplink_seid = veb->seid;
6599         }
6600
6601         /* get vsi sw struct */
6602         v_idx = i40e_vsi_mem_alloc(pf, type);
6603         if (v_idx < 0)
6604                 goto err_alloc;
6605         vsi = pf->vsi[v_idx];
6606         vsi->type = type;
6607         vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);
6608
6609         if (type == I40E_VSI_MAIN)
6610                 pf->lan_vsi = v_idx;
6611         else if (type == I40E_VSI_SRIOV)
6612                 vsi->vf_id = param1;
6613         /* assign it some queues */
6614         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
6615         if (ret < 0) {
6616                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
6617                          vsi->seid, ret);
6618                 goto err_vsi;
6619         }
6620         vsi->base_queue = ret;
6621
6622         /* get a VSI from the hardware */
6623         vsi->uplink_seid = uplink_seid;
6624         ret = i40e_add_vsi(vsi);
6625         if (ret)
6626                 goto err_vsi;
6627
6628         switch (vsi->type) {
6629         /* setup the netdev if needed */
6630         case I40E_VSI_MAIN:
6631         case I40E_VSI_VMDQ2:
6632                 ret = i40e_config_netdev(vsi);
6633                 if (ret)
6634                         goto err_netdev;
6635                 ret = register_netdev(vsi->netdev);
6636                 if (ret)
6637                         goto err_netdev;
6638                 vsi->netdev_registered = true;
6639                 netif_carrier_off(vsi->netdev);
6640                 /* fall through */
6641
6642         case I40E_VSI_FDIR:
6643                 /* set up vectors and rings if needed */
6644                 ret = i40e_vsi_setup_vectors(vsi);
6645                 if (ret)
6646                         goto err_msix;
6647
6648                 ret = i40e_alloc_rings(vsi);
6649                 if (ret)
6650                         goto err_rings;
6651
6652                 /* map all of the rings to the q_vectors */
6653                 i40e_vsi_map_rings_to_vectors(vsi);
6654
6655                 i40e_vsi_reset_stats(vsi);
6656                 break;
6657
6658         default:
6659                 /* no netdev or rings for the other VSI types */
6660                 break;
6661         }
6662
6663         return vsi;
6664
6665 err_rings:
6666         i40e_vsi_free_q_vectors(vsi);
6667 err_msix:
6668         if (vsi->netdev_registered) {
6669                 vsi->netdev_registered = false;
6670                 unregister_netdev(vsi->netdev);
6671                 free_netdev(vsi->netdev);
6672                 vsi->netdev = NULL;
6673         }
6674 err_netdev:
6675         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
6676 err_vsi:
6677         i40e_vsi_clear(vsi);
6678 err_alloc:
6679         return NULL;
6680 }
6681
6682 /**
6683  * i40e_veb_get_bw_info - Query VEB BW information
6684  * @veb: the veb to query
6685  *
6686  * Query the Tx scheduler BW configuration data for given VEB
6687  **/
6688 static int i40e_veb_get_bw_info(struct i40e_veb *veb)
6689 {
6690         struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
6691         struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
6692         struct i40e_pf *pf = veb->pf;
6693         struct i40e_hw *hw = &pf->hw;
6694         u32 tc_bw_max;
6695         int ret = 0;
6696         int i;
6697
6698         ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
6699                                                   &bw_data, NULL);
6700         if (ret) {
6701                 dev_info(&pf->pdev->dev,
6702                          "query veb bw config failed, aq_err=%d\n",
6703                          hw->aq.asq_last_status);
6704                 goto out;
6705         }
6706
6707         ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
6708                                                    &ets_data, NULL);
6709         if (ret) {
6710                 dev_info(&pf->pdev->dev,
6711                          "query veb bw ets config failed, aq_err=%d\n",
6712                          hw->aq.asq_last_status);
6713                 goto out;
6714         }
6715
6716         veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
6717         veb->bw_max_quanta = ets_data.tc_bw_max;
6718         veb->is_abs_credits = bw_data.absolute_credits_enable;
6719         tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
6720                     (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
6721         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
6722                 veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
6723                 veb->bw_tc_limit_credits[i] =
6724                                         le16_to_cpu(bw_data.tc_bw_limits[i]);
6725                 veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
6726         }
6727
6728 out:
6729         return ret;
6730 }
6731
6732 /**
6733  * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
6734  * @pf: board private structure
6735  *
6736  * On error: returns error code (negative)
6737  * On success: returns vsi index in PF (positive)
6738  **/
6739 static int i40e_veb_mem_alloc(struct i40e_pf *pf)
6740 {
6741         int ret = -ENOENT;
6742         struct i40e_veb *veb;
6743         int i;
6744
6745         /* Need to protect the allocation of switch elements at the PF level */
6746         mutex_lock(&pf->switch_mutex);
6747
6748         /* VEB list may be fragmented if VEB creation/destruction has
6749          * been happening.  We can afford to do a quick scan to look
6750          * for any free slots in the list.
6751          *
6752          * find next empty veb slot, looping back around if necessary
6753          */
6754         i = 0;
6755         while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
6756                 i++;
6757         if (i >= I40E_MAX_VEB) {
6758                 ret = -ENOMEM;
6759                 goto err_alloc_veb;  /* out of VEB slots! */
6760         }
6761
6762         veb = kzalloc(sizeof(*veb), GFP_KERNEL);
6763         if (!veb) {
6764                 ret = -ENOMEM;
6765                 goto err_alloc_veb;
6766         }
6767         veb->pf = pf;
6768         veb->idx = i;
6769         veb->enabled_tc = 1;
6770
6771         pf->veb[i] = veb;
6772         ret = i;
6773 err_alloc_veb:
6774         mutex_unlock(&pf->switch_mutex);
6775         return ret;
6776 }
6777
6778 /**
6779  * i40e_switch_branch_release - Delete a branch of the switch tree
6780  * @branch: where to start deleting
6781  *
6782  * This uses recursion to find the tips of the branch to be
6783  * removed, deleting until we get back to and can delete this VEB.
6784  **/
6785 static void i40e_switch_branch_release(struct i40e_veb *branch)
6786 {
6787         struct i40e_pf *pf = branch->pf;
6788         u16 branch_seid = branch->seid;
6789         u16 veb_idx = branch->idx;
6790         int i;
6791
6792         /* release any VEBs on this VEB - RECURSION */
6793         for (i = 0; i < I40E_MAX_VEB; i++) {
6794                 if (!pf->veb[i])
6795                         continue;
6796                 if (pf->veb[i]->uplink_seid == branch->seid)
6797                         i40e_switch_branch_release(pf->veb[i]);
6798         }
6799
6800         /* Release the VSIs on this VEB, but not the owner VSI.
6801          *
6802          * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
6803          *       the VEB itself, so don't use (*branch) after this loop.
6804          */
6805         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6806                 if (!pf->vsi[i])
6807                         continue;
6808                 if (pf->vsi[i]->uplink_seid == branch_seid &&
6809                    (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
6810                         i40e_vsi_release(pf->vsi[i]);
6811                 }
6812         }
6813
6814         /* There's one corner case where the VEB might not have been
6815          * removed, so double check it here and remove it if needed.
6816          * This case happens if the veb was created from the debugfs
6817          * commands and no VSIs were added to it.
6818          */
6819         if (pf->veb[veb_idx])
6820                 i40e_veb_release(pf->veb[veb_idx]);
6821 }
6822
6823 /**
6824  * i40e_veb_clear - remove veb struct
6825  * @veb: the veb to remove
6826  **/
6827 static void i40e_veb_clear(struct i40e_veb *veb)
6828 {
6829         if (!veb)
6830                 return;
6831
6832         if (veb->pf) {
6833                 struct i40e_pf *pf = veb->pf;
6834
6835                 mutex_lock(&pf->switch_mutex);
6836                 if (pf->veb[veb->idx] == veb)
6837                         pf->veb[veb->idx] = NULL;
6838                 mutex_unlock(&pf->switch_mutex);
6839         }
6840
6841         kfree(veb);
6842 }
6843
6844 /**
6845  * i40e_veb_release - Delete a VEB and free its resources
6846  * @veb: the VEB being removed
6847  **/
6848 void i40e_veb_release(struct i40e_veb *veb)
6849 {
6850         struct i40e_vsi *vsi = NULL;
6851         struct i40e_pf *pf;
6852         int i, n = 0;
6853
6854         pf = veb->pf;
6855
6856         /* find the remaining VSI and check for extras */
6857         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6858                 if (pf->vsi[i] && pf->vsi[i]->uplink_seid == veb->seid) {
6859                         n++;
6860                         vsi = pf->vsi[i];
6861                 }
6862         }
6863         if (n != 1) {
6864                 dev_info(&pf->pdev->dev,
6865                          "can't remove VEB %d with %d VSIs left\n",
6866                          veb->seid, n);
6867                 return;
6868         }
6869
6870         /* move the remaining VSI to uplink veb */
6871         vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
6872         if (veb->uplink_seid) {
6873                 vsi->uplink_seid = veb->uplink_seid;
6874                 if (veb->uplink_seid == pf->mac_seid)
6875                         vsi->veb_idx = I40E_NO_VEB;
6876                 else
6877                         vsi->veb_idx = veb->veb_idx;
6878         } else {
6879                 /* floating VEB */
6880                 vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
6881                 vsi->veb_idx = pf->vsi[pf->lan_vsi]->veb_idx;
6882         }
6883
6884         i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
6885         i40e_veb_clear(veb);
6886
6887         return;
6888 }
6889
6890 /**
6891  * i40e_add_veb - create the VEB in the switch
6892  * @veb: the VEB to be instantiated
6893  * @vsi: the controlling VSI
6894  **/
6895 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
6896 {
6897         bool is_default = false;
6898         bool is_cloud = false;
6899         int ret;
6900
6901         /* get a VEB from the hardware */
6902         ret = i40e_aq_add_veb(&veb->pf->hw, veb->uplink_seid, vsi->seid,
6903                               veb->enabled_tc, is_default,
6904                               is_cloud, &veb->seid, NULL);
6905         if (ret) {
6906                 dev_info(&veb->pf->pdev->dev,
6907                          "couldn't add VEB, err %d, aq_err %d\n",
6908                          ret, veb->pf->hw.aq.asq_last_status);
6909                 return -EPERM;
6910         }
6911
6912         /* get statistics counter */
6913         ret = i40e_aq_get_veb_parameters(&veb->pf->hw, veb->seid, NULL, NULL,
6914                                          &veb->stats_idx, NULL, NULL, NULL);
6915         if (ret) {
6916                 dev_info(&veb->pf->pdev->dev,
6917                          "couldn't get VEB statistics idx, err %d, aq_err %d\n",
6918                          ret, veb->pf->hw.aq.asq_last_status);
6919                 return -EPERM;
6920         }
6921         ret = i40e_veb_get_bw_info(veb);
6922         if (ret) {
6923                 dev_info(&veb->pf->pdev->dev,
6924                          "couldn't get VEB bw info, err %d, aq_err %d\n",
6925                          ret, veb->pf->hw.aq.asq_last_status);
6926                 i40e_aq_delete_element(&veb->pf->hw, veb->seid, NULL);
6927                 return -ENOENT;
6928         }
6929
6930         vsi->uplink_seid = veb->seid;
6931         vsi->veb_idx = veb->idx;
6932         vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
6933
6934         return 0;
6935 }
6936
6937 /**
6938  * i40e_veb_setup - Set up a VEB
6939  * @pf: board private structure
6940  * @flags: VEB setup flags
6941  * @uplink_seid: the switch element to link to
6942  * @vsi_seid: the initial VSI seid
6943  * @enabled_tc: Enabled TC bit-map
6944  *
6945  * This allocates the sw VEB structure and links it into the switch
6946  * It is possible and legal for this to be a duplicate of an already
6947  * existing VEB.  It is also possible for both uplink and vsi seids
6948  * to be zero, in order to create a floating VEB.
6949  *
6950  * Returns pointer to the successfully allocated VEB sw struct on
6951  * success, otherwise returns NULL on failure.
6952  **/
6953 struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 flags,
6954                                 u16 uplink_seid, u16 vsi_seid,
6955                                 u8 enabled_tc)
6956 {
6957         struct i40e_veb *veb, *uplink_veb = NULL;
6958         int vsi_idx, veb_idx;
6959         int ret;
6960
6961         /* if one seid is 0, the other must be 0 to create a floating relay */
6962         if ((uplink_seid == 0 || vsi_seid == 0) &&
6963             (uplink_seid + vsi_seid != 0)) {
6964                 dev_info(&pf->pdev->dev,
6965                          "one, not both seid's are 0: uplink=%d vsi=%d\n",
6966                          uplink_seid, vsi_seid);
6967                 return NULL;
6968         }
6969
6970         /* make sure there is such a vsi and uplink */
6971         for (vsi_idx = 0; vsi_idx < pf->hw.func_caps.num_vsis; vsi_idx++)
6972                 if (pf->vsi[vsi_idx] && pf->vsi[vsi_idx]->seid == vsi_seid)
6973                         break;
6974         if (vsi_idx >= pf->hw.func_caps.num_vsis && vsi_seid != 0) {
6975                 dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
6976                          vsi_seid);
6977                 return NULL;
6978         }
6979
6980         if (uplink_seid && uplink_seid != pf->mac_seid) {
6981                 for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
6982                         if (pf->veb[veb_idx] &&
6983                             pf->veb[veb_idx]->seid == uplink_seid) {
6984                                 uplink_veb = pf->veb[veb_idx];
6985                                 break;
6986                         }
6987                 }
6988                 if (!uplink_veb) {
6989                         dev_info(&pf->pdev->dev,
6990                                  "uplink seid %d not found\n", uplink_seid);
6991                         return NULL;
6992                 }
6993         }
6994
6995         /* get veb sw struct */
6996         veb_idx = i40e_veb_mem_alloc(pf);
6997         if (veb_idx < 0)
6998                 goto err_alloc;
6999         veb = pf->veb[veb_idx];
7000         veb->flags = flags;
7001         veb->uplink_seid = uplink_seid;
7002         veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
7003         veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);
7004
7005         /* create the VEB in the switch */
7006         ret = i40e_add_veb(veb, pf->vsi[vsi_idx]);
7007         if (ret)
7008                 goto err_veb;
7009
7010         return veb;
7011
7012 err_veb:
7013         i40e_veb_clear(veb);
7014 err_alloc:
7015         return NULL;
7016 }
7017
7018 /**
7019  * i40e_setup_pf_switch_element - set pf vars based on switch type
7020  * @pf: board private structure
7021  * @ele: element we are building info from
7022  * @num_reported: total number of elements
7023  * @printconfig: should we print the contents
7024  *
7025  * helper function to assist in extracting a few useful SEID values.
7026  **/
7027 static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
7028                                 struct i40e_aqc_switch_config_element_resp *ele,
7029                                 u16 num_reported, bool printconfig)
7030 {
7031         u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
7032         u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
7033         u8 element_type = ele->element_type;
7034         u16 seid = le16_to_cpu(ele->seid);
7035
7036         if (printconfig)
7037                 dev_info(&pf->pdev->dev,
7038                          "type=%d seid=%d uplink=%d downlink=%d\n",
7039                          element_type, seid, uplink_seid, downlink_seid);
7040
7041         switch (element_type) {
7042         case I40E_SWITCH_ELEMENT_TYPE_MAC:
7043                 pf->mac_seid = seid;
7044                 break;
7045         case I40E_SWITCH_ELEMENT_TYPE_VEB:
7046                 /* Main VEB? */
7047                 if (uplink_seid != pf->mac_seid)
7048                         break;
7049                 if (pf->lan_veb == I40E_NO_VEB) {
7050                         int v;
7051
7052                         /* find existing or else empty VEB */
7053                         for (v = 0; v < I40E_MAX_VEB; v++) {
7054                                 if (pf->veb[v] && (pf->veb[v]->seid == seid)) {
7055                                         pf->lan_veb = v;
7056                                         break;
7057                                 }
7058                         }
7059                         if (pf->lan_veb == I40E_NO_VEB) {
7060                                 v = i40e_veb_mem_alloc(pf);
7061                                 if (v < 0)
7062                                         break;
7063                                 pf->lan_veb = v;
7064                         }
7065                 }
7066
7067                 pf->veb[pf->lan_veb]->seid = seid;
7068                 pf->veb[pf->lan_veb]->uplink_seid = pf->mac_seid;
7069                 pf->veb[pf->lan_veb]->pf = pf;
7070                 pf->veb[pf->lan_veb]->veb_idx = I40E_NO_VEB;
7071                 break;
7072         case I40E_SWITCH_ELEMENT_TYPE_VSI:
7073                 if (num_reported != 1)
7074                         break;
7075                 /* This is immediately after a reset so we can assume this is
7076                  * the PF's VSI
7077                  */
7078                 pf->mac_seid = uplink_seid;
7079                 pf->pf_seid = downlink_seid;
7080                 pf->main_vsi_seid = seid;
7081                 if (printconfig)
7082                         dev_info(&pf->pdev->dev,
7083                                  "pf_seid=%d main_vsi_seid=%d\n",
7084                                  pf->pf_seid, pf->main_vsi_seid);
7085                 break;
7086         case I40E_SWITCH_ELEMENT_TYPE_PF:
7087         case I40E_SWITCH_ELEMENT_TYPE_VF:
7088         case I40E_SWITCH_ELEMENT_TYPE_EMP:
7089         case I40E_SWITCH_ELEMENT_TYPE_BMC:
7090         case I40E_SWITCH_ELEMENT_TYPE_PE:
7091         case I40E_SWITCH_ELEMENT_TYPE_PA:
7092                 /* ignore these for now */
7093                 break;
7094         default:
7095                 dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
7096                          element_type, seid);
7097                 break;
7098         }
7099 }
7100
7101 /**
7102  * i40e_fetch_switch_configuration - Get switch config from firmware
7103  * @pf: board private structure
7104  * @printconfig: should we print the contents
7105  *
7106  * Get the current switch configuration from the device and
7107  * extract a few useful SEID values.
7108  **/
7109 int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
7110 {
7111         struct i40e_aqc_get_switch_config_resp *sw_config;
7112         u16 next_seid = 0;
7113         int ret = 0;
7114         u8 *aq_buf;
7115         int i;
7116
7117         aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
7118         if (!aq_buf)
7119                 return -ENOMEM;
7120
7121         sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
7122         do {
7123                 u16 num_reported, num_total;
7124
7125                 ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
7126                                                 I40E_AQ_LARGE_BUF,
7127                                                 &next_seid, NULL);
7128                 if (ret) {
7129                         dev_info(&pf->pdev->dev,
7130                                  "get switch config failed %d aq_err=%x\n",
7131                                  ret, pf->hw.aq.asq_last_status);
7132                         kfree(aq_buf);
7133                         return -ENOENT;
7134                 }
7135
7136                 num_reported = le16_to_cpu(sw_config->header.num_reported);
7137                 num_total = le16_to_cpu(sw_config->header.num_total);
7138
7139                 if (printconfig)
7140                         dev_info(&pf->pdev->dev,
7141                                  "header: %d reported %d total\n",
7142                                  num_reported, num_total);
7143
7144                 if (num_reported) {
7145                         int sz = sizeof(*sw_config) * num_reported;
7146
7147                         kfree(pf->sw_config);
7148                         pf->sw_config = kzalloc(sz, GFP_KERNEL);
7149                         if (pf->sw_config)
7150                                 memcpy(pf->sw_config, sw_config, sz);
7151                 }
7152
7153                 for (i = 0; i < num_reported; i++) {
7154                         struct i40e_aqc_switch_config_element_resp *ele =
7155                                 &sw_config->element[i];
7156
7157                         i40e_setup_pf_switch_element(pf, ele, num_reported,
7158                                                      printconfig);
7159                 }
7160         } while (next_seid != 0);
7161
7162         kfree(aq_buf);
7163         return ret;
7164 }
7165
7166 /**
7167  * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
7168  * @pf: board private structure
7169  * @reinit: if the Main VSI needs to re-initialized.
7170  *
7171  * Returns 0 on success, negative value on failure
7172  **/
7173 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
7174 {
7175         u32 rxfc = 0, txfc = 0, rxfc_reg;
7176         int ret;
7177
7178         /* find out what's out there already */
7179         ret = i40e_fetch_switch_configuration(pf, false);
7180         if (ret) {
7181                 dev_info(&pf->pdev->dev,
7182                          "couldn't fetch switch config, err %d, aq_err %d\n",
7183                          ret, pf->hw.aq.asq_last_status);
7184                 return ret;
7185         }
7186         i40e_pf_reset_stats(pf);
7187
7188         /* fdir VSI must happen first to be sure it gets queue 0, but only
7189          * if there is enough room for the fdir VSI
7190          */
7191         if (pf->num_lan_qps > 1)
7192                 i40e_fdir_setup(pf);
7193
7194         /* first time setup */
7195         if (pf->lan_vsi == I40E_NO_VSI || reinit) {
7196                 struct i40e_vsi *vsi = NULL;
7197                 u16 uplink_seid;
7198
7199                 /* Set up the PF VSI associated with the PF's main VSI
7200                  * that is already in the HW switch
7201                  */
7202                 if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
7203                         uplink_seid = pf->veb[pf->lan_veb]->seid;
7204                 else
7205                         uplink_seid = pf->mac_seid;
7206                 if (pf->lan_vsi == I40E_NO_VSI)
7207                         vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN, uplink_seid, 0);
7208                 else if (reinit)
7209                         vsi = i40e_vsi_reinit_setup(pf->vsi[pf->lan_vsi]);
7210                 if (!vsi) {
7211                         dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
7212                         i40e_fdir_teardown(pf);
7213                         return -EAGAIN;
7214                 }
7215         } else {
7216                 /* force a reset of TC and queue layout configurations */
7217                 u8 enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
7218                 pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
7219                 pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
7220                 i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
7221         }
7222         i40e_vlan_stripping_disable(pf->vsi[pf->lan_vsi]);
7223
7224         /* Setup static PF queue filter control settings */
7225         ret = i40e_setup_pf_filter_control(pf);
7226         if (ret) {
7227                 dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
7228                          ret);
7229                 /* Failure here should not stop continuing other steps */
7230         }
7231
7232         /* enable RSS in the HW, even for only one queue, as the stack can use
7233          * the hash
7234          */
7235         if ((pf->flags & I40E_FLAG_RSS_ENABLED))
7236                 i40e_config_rss(pf);
7237
7238         /* fill in link information and enable LSE reporting */
7239         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
7240         i40e_link_event(pf);
7241
7242         /* Initialize user-specific link properties */
7243         pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
7244                                   I40E_AQ_AN_COMPLETED) ? true : false);
7245         /* requested_mode is set in probe or by ethtool */
7246         if (!pf->fc_autoneg_status)
7247                 goto no_autoneg;
7248
7249         if ((pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX) &&
7250             (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX))
7251                 pf->hw.fc.current_mode = I40E_FC_FULL;
7252         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX)
7253                 pf->hw.fc.current_mode = I40E_FC_TX_PAUSE;
7254         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX)
7255                 pf->hw.fc.current_mode = I40E_FC_RX_PAUSE;
7256         else
7257                 pf->hw.fc.current_mode = I40E_FC_NONE;
7258
7259         /* sync the flow control settings with the auto-neg values */
7260         switch (pf->hw.fc.current_mode) {
7261         case I40E_FC_FULL:
7262                 txfc = 1;
7263                 rxfc = 1;
7264                 break;
7265         case I40E_FC_TX_PAUSE:
7266                 txfc = 1;
7267                 rxfc = 0;
7268                 break;
7269         case I40E_FC_RX_PAUSE:
7270                 txfc = 0;
7271                 rxfc = 1;
7272                 break;
7273         case I40E_FC_NONE:
7274         case I40E_FC_DEFAULT:
7275                 txfc = 0;
7276                 rxfc = 0;
7277                 break;
7278         case I40E_FC_PFC:
7279                 /* TBD */
7280                 break;
7281         /* no default case, we have to handle all possibilities here */
7282         }
7283
7284         wr32(&pf->hw, I40E_PRTDCB_FCCFG, txfc << I40E_PRTDCB_FCCFG_TFCE_SHIFT);
7285
7286         rxfc_reg = rd32(&pf->hw, I40E_PRTDCB_MFLCN) &
7287                    ~I40E_PRTDCB_MFLCN_RFCE_MASK;
7288         rxfc_reg |= (rxfc << I40E_PRTDCB_MFLCN_RFCE_SHIFT);
7289
7290         wr32(&pf->hw, I40E_PRTDCB_MFLCN, rxfc_reg);
7291
7292         goto fc_complete;
7293
7294 no_autoneg:
7295         /* disable L2 flow control, user can turn it on if they wish */
7296         wr32(&pf->hw, I40E_PRTDCB_FCCFG, 0);
7297         wr32(&pf->hw, I40E_PRTDCB_MFLCN, rd32(&pf->hw, I40E_PRTDCB_MFLCN) &
7298                                          ~I40E_PRTDCB_MFLCN_RFCE_MASK);
7299
7300 fc_complete:
7301         return ret;
7302 }
7303
7304 /**
7305  * i40e_set_rss_size - helper to set rss_size
7306  * @pf: board private structure
7307  * @queues_left: how many queues
7308  */
7309 static u16 i40e_set_rss_size(struct i40e_pf *pf, int queues_left)
7310 {
7311         int num_tc0;
7312
7313         num_tc0 = min_t(int, queues_left, pf->rss_size_max);
7314         num_tc0 = min_t(int, num_tc0, num_online_cpus());
7315         num_tc0 = rounddown_pow_of_two(num_tc0);
7316
7317         return num_tc0;
7318 }
7319
7320 /**
7321  * i40e_determine_queue_usage - Work out queue distribution
7322  * @pf: board private structure
7323  **/
7324 static void i40e_determine_queue_usage(struct i40e_pf *pf)
7325 {
7326         int accum_tc_size;
7327         int queues_left;
7328
7329         pf->num_lan_qps = 0;
7330         pf->num_tc_qps = rounddown_pow_of_two(pf->num_tc_qps);
7331         accum_tc_size = (I40E_MAX_TRAFFIC_CLASS - 1) * pf->num_tc_qps;
7332
7333         /* Find the max queues to be put into basic use.  We'll always be
7334          * using TC0, whether or not DCB is running, and TC0 will get the
7335          * big RSS set.
7336          */
7337         queues_left = pf->hw.func_caps.num_tx_qp;
7338
7339         if   (!(pf->flags & I40E_FLAG_MSIX_ENABLED) ||
7340                 !(pf->flags & (I40E_FLAG_RSS_ENABLED |
7341                 I40E_FLAG_FDIR_ENABLED | I40E_FLAG_DCB_ENABLED)) ||
7342                 (queues_left == 1)) {
7343
7344                 /* one qp for PF, no queues for anything else */
7345                 queues_left = 0;
7346                 pf->rss_size = pf->num_lan_qps = 1;
7347
7348                 /* make sure all the fancies are disabled */
7349                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED       |
7350                                 I40E_FLAG_FDIR_ENABLED     |
7351                                 I40E_FLAG_FDIR_ATR_ENABLED |
7352                                 I40E_FLAG_DCB_ENABLED      |
7353                                 I40E_FLAG_SRIOV_ENABLED    |
7354                                 I40E_FLAG_VMDQ_ENABLED);
7355
7356         } else if (pf->flags & I40E_FLAG_RSS_ENABLED      &&
7357                    !(pf->flags & I40E_FLAG_FDIR_ENABLED)  &&
7358                    !(pf->flags & I40E_FLAG_DCB_ENABLED)) {
7359
7360                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
7361
7362                 queues_left -= pf->rss_size;
7363                 pf->num_lan_qps = pf->rss_size_max;
7364
7365         } else if (pf->flags & I40E_FLAG_RSS_ENABLED      &&
7366                    !(pf->flags & I40E_FLAG_FDIR_ENABLED)  &&
7367                    (pf->flags & I40E_FLAG_DCB_ENABLED)) {
7368
7369                 /* save num_tc_qps queues for TCs 1 thru 7 and the rest
7370                  * are set up for RSS in TC0
7371                  */
7372                 queues_left -= accum_tc_size;
7373
7374                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
7375
7376                 queues_left -= pf->rss_size;
7377                 if (queues_left < 0) {
7378                         dev_info(&pf->pdev->dev, "not enough queues for DCB\n");
7379                         return;
7380                 }
7381
7382                 pf->num_lan_qps = pf->rss_size_max + accum_tc_size;
7383
7384         } else if (pf->flags & I40E_FLAG_RSS_ENABLED   &&
7385                   (pf->flags & I40E_FLAG_FDIR_ENABLED) &&
7386                   !(pf->flags & I40E_FLAG_DCB_ENABLED)) {
7387
7388                 queues_left -= 1; /* save 1 queue for FD */
7389
7390                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
7391
7392                 queues_left -= pf->rss_size;
7393                 if (queues_left < 0) {
7394                         dev_info(&pf->pdev->dev, "not enough queues for Flow Director\n");
7395                         return;
7396                 }
7397
7398                 pf->num_lan_qps = pf->rss_size_max;
7399
7400         } else if (pf->flags & I40E_FLAG_RSS_ENABLED   &&
7401                   (pf->flags & I40E_FLAG_FDIR_ENABLED) &&
7402                   (pf->flags & I40E_FLAG_DCB_ENABLED)) {
7403
7404                 /* save 1 queue for TCs 1 thru 7,
7405                  * 1 queue for flow director,
7406                  * and the rest are set up for RSS in TC0
7407                  */
7408                 queues_left -= 1;
7409                 queues_left -= accum_tc_size;
7410
7411                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
7412                 queues_left -= pf->rss_size;
7413                 if (queues_left < 0) {
7414                         dev_info(&pf->pdev->dev, "not enough queues for DCB and Flow Director\n");
7415                         return;
7416                 }
7417
7418                 pf->num_lan_qps = pf->rss_size_max + accum_tc_size;
7419
7420         } else {
7421                 dev_info(&pf->pdev->dev,
7422                          "Invalid configuration, flags=0x%08llx\n", pf->flags);
7423                 return;
7424         }
7425
7426         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
7427             pf->num_vf_qps && pf->num_req_vfs && queues_left) {
7428                 pf->num_req_vfs = min_t(int, pf->num_req_vfs, (queues_left /
7429                                                                pf->num_vf_qps));
7430                 queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
7431         }
7432
7433         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
7434             pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
7435                 pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
7436                                           (queues_left / pf->num_vmdq_qps));
7437                 queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
7438         }
7439
7440         pf->queues_left = queues_left;
7441         return;
7442 }
7443
7444 /**
7445  * i40e_setup_pf_filter_control - Setup PF static filter control
7446  * @pf: PF to be setup
7447  *
7448  * i40e_setup_pf_filter_control sets up a pf's initial filter control
7449  * settings. If PE/FCoE are enabled then it will also set the per PF
7450  * based filter sizes required for them. It also enables Flow director,
7451  * ethertype and macvlan type filter settings for the pf.
7452  *
7453  * Returns 0 on success, negative on failure
7454  **/
7455 static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
7456 {
7457         struct i40e_filter_control_settings *settings = &pf->filter_settings;
7458
7459         settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;
7460
7461         /* Flow Director is enabled */
7462         if (pf->flags & (I40E_FLAG_FDIR_ENABLED | I40E_FLAG_FDIR_ATR_ENABLED))
7463                 settings->enable_fdir = true;
7464
7465         /* Ethtype and MACVLAN filters enabled for PF */
7466         settings->enable_ethtype = true;
7467         settings->enable_macvlan = true;
7468
7469         if (i40e_set_filter_control(&pf->hw, settings))
7470                 return -ENOENT;
7471
7472         return 0;
7473 }
7474
7475 /**
7476  * i40e_probe - Device initialization routine
7477  * @pdev: PCI device information struct
7478  * @ent: entry in i40e_pci_tbl
7479  *
7480  * i40e_probe initializes a pf identified by a pci_dev structure.
7481  * The OS initialization, configuring of the pf private structure,
7482  * and a hardware reset occur.
7483  *
7484  * Returns 0 on success, negative on failure
7485  **/
7486 static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7487 {
7488         struct i40e_driver_version dv;
7489         struct i40e_pf *pf;
7490         struct i40e_hw *hw;
7491         static u16 pfs_found;
7492         u16 link_status;
7493         int err = 0;
7494         u32 len;
7495
7496         err = pci_enable_device_mem(pdev);
7497         if (err)
7498                 return err;
7499
7500         /* set up for high or low dma */
7501         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7502                 /* coherent mask for the same size will always succeed if
7503                  * dma_set_mask does
7504                  */
7505                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
7506         } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
7507                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
7508         } else {
7509                 dev_err(&pdev->dev, "DMA configuration failed: %d\n", err);
7510                 err = -EIO;
7511                 goto err_dma;
7512         }
7513
7514         /* set up pci connections */
7515         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7516                                            IORESOURCE_MEM), i40e_driver_name);
7517         if (err) {
7518                 dev_info(&pdev->dev,
7519                          "pci_request_selected_regions failed %d\n", err);
7520                 goto err_pci_reg;
7521         }
7522
7523         pci_enable_pcie_error_reporting(pdev);
7524         pci_set_master(pdev);
7525
7526         /* Now that we have a PCI connection, we need to do the
7527          * low level device setup.  This is primarily setting up
7528          * the Admin Queue structures and then querying for the
7529          * device's current profile information.
7530          */
7531         pf = kzalloc(sizeof(*pf), GFP_KERNEL);
7532         if (!pf) {
7533                 err = -ENOMEM;
7534                 goto err_pf_alloc;
7535         }
7536         pf->next_vsi = 0;
7537         pf->pdev = pdev;
7538         set_bit(__I40E_DOWN, &pf->state);
7539
7540         hw = &pf->hw;
7541         hw->back = pf;
7542         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7543                               pci_resource_len(pdev, 0));
7544         if (!hw->hw_addr) {
7545                 err = -EIO;
7546                 dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
7547                          (unsigned int)pci_resource_start(pdev, 0),
7548                          (unsigned int)pci_resource_len(pdev, 0), err);
7549                 goto err_ioremap;
7550         }
7551         hw->vendor_id = pdev->vendor;
7552         hw->device_id = pdev->device;
7553         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
7554         hw->subsystem_vendor_id = pdev->subsystem_vendor;
7555         hw->subsystem_device_id = pdev->subsystem_device;
7556         hw->bus.device = PCI_SLOT(pdev->devfn);
7557         hw->bus.func = PCI_FUNC(pdev->devfn);
7558         pf->instance = pfs_found;
7559
7560         /* do a special CORER for clearing PXE mode once at init */
7561         if (hw->revision_id == 0 &&
7562             (rd32(hw, I40E_GLLAN_RCTL_0) & I40E_GLLAN_RCTL_0_PXE_MODE_MASK)) {
7563                 wr32(hw, I40E_GLGEN_RTRIG, I40E_GLGEN_RTRIG_CORER_MASK);
7564                 i40e_flush(hw);
7565                 msleep(200);
7566                 pf->corer_count++;
7567
7568                 i40e_clear_pxe_mode(hw);
7569         }
7570
7571         /* Reset here to make sure all is clean and to define PF 'n' */
7572         err = i40e_pf_reset(hw);
7573         if (err) {
7574                 dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
7575                 goto err_pf_reset;
7576         }
7577         pf->pfr_count++;
7578
7579         hw->aq.num_arq_entries = I40E_AQ_LEN;
7580         hw->aq.num_asq_entries = I40E_AQ_LEN;
7581         hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
7582         hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
7583         pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;
7584         snprintf(pf->misc_int_name, sizeof(pf->misc_int_name) - 1,
7585                  "%s-pf%d:misc",
7586                  dev_driver_string(&pf->pdev->dev), pf->hw.pf_id);
7587
7588         err = i40e_init_shared_code(hw);
7589         if (err) {
7590                 dev_info(&pdev->dev, "init_shared_code failed: %d\n", err);
7591                 goto err_pf_reset;
7592         }
7593
7594         /* set up a default setting for link flow control */
7595         pf->hw.fc.requested_mode = I40E_FC_NONE;
7596
7597         err = i40e_init_adminq(hw);
7598         dev_info(&pdev->dev, "%s\n", i40e_fw_version_str(hw));
7599         if (((hw->nvm.version & I40E_NVM_VERSION_HI_MASK)
7600                  >> I40E_NVM_VERSION_HI_SHIFT) != I40E_CURRENT_NVM_VERSION_HI) {
7601                 dev_info(&pdev->dev,
7602                          "warning: NVM version not supported, supported version: %02x.%02x\n",
7603                          I40E_CURRENT_NVM_VERSION_HI,
7604                          I40E_CURRENT_NVM_VERSION_LO);
7605         }
7606         if (err) {
7607                 dev_info(&pdev->dev,
7608                          "init_adminq failed: %d expecting API %02x.%02x\n",
7609                          err,
7610                          I40E_FW_API_VERSION_MAJOR, I40E_FW_API_VERSION_MINOR);
7611                 goto err_pf_reset;
7612         }
7613
7614         err = i40e_get_capabilities(pf);
7615         if (err)
7616                 goto err_adminq_setup;
7617
7618         err = i40e_sw_init(pf);
7619         if (err) {
7620                 dev_info(&pdev->dev, "sw_init failed: %d\n", err);
7621                 goto err_sw_init;
7622         }
7623
7624         err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
7625                                 hw->func_caps.num_rx_qp,
7626                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
7627         if (err) {
7628                 dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
7629                 goto err_init_lan_hmc;
7630         }
7631
7632         err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
7633         if (err) {
7634                 dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
7635                 err = -ENOENT;
7636                 goto err_configure_lan_hmc;
7637         }
7638
7639         i40e_get_mac_addr(hw, hw->mac.addr);
7640         if (!is_valid_ether_addr(hw->mac.addr)) {
7641                 dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
7642                 err = -EIO;
7643                 goto err_mac_addr;
7644         }
7645         dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
7646         memcpy(hw->mac.perm_addr, hw->mac.addr, ETH_ALEN);
7647
7648         pci_set_drvdata(pdev, pf);
7649         pci_save_state(pdev);
7650
7651         /* set up periodic task facility */
7652         setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
7653         pf->service_timer_period = HZ;
7654
7655         INIT_WORK(&pf->service_task, i40e_service_task);
7656         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
7657         pf->flags |= I40E_FLAG_NEED_LINK_UPDATE;
7658         pf->link_check_timeout = jiffies;
7659
7660         /* WoL defaults to disabled */
7661         pf->wol_en = false;
7662         device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);
7663
7664         /* set up the main switch operations */
7665         i40e_determine_queue_usage(pf);
7666         i40e_init_interrupt_scheme(pf);
7667
7668         /* Set up the *vsi struct based on the number of VSIs in the HW,
7669          * and set up our local tracking of the MAIN PF vsi.
7670          */
7671         len = sizeof(struct i40e_vsi *) * pf->hw.func_caps.num_vsis;
7672         pf->vsi = kzalloc(len, GFP_KERNEL);
7673         if (!pf->vsi) {
7674                 err = -ENOMEM;
7675                 goto err_switch_setup;
7676         }
7677
7678         err = i40e_setup_pf_switch(pf, false);
7679         if (err) {
7680                 dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
7681                 goto err_vsis;
7682         }
7683
7684         /* The main driver is (mostly) up and happy. We need to set this state
7685          * before setting up the misc vector or we get a race and the vector
7686          * ends up disabled forever.
7687          */
7688         clear_bit(__I40E_DOWN, &pf->state);
7689
7690         /* In case of MSIX we are going to setup the misc vector right here
7691          * to handle admin queue events etc. In case of legacy and MSI
7692          * the misc functionality and queue processing is combined in
7693          * the same vector and that gets setup at open.
7694          */
7695         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
7696                 err = i40e_setup_misc_vector(pf);
7697                 if (err) {
7698                         dev_info(&pdev->dev,
7699                                  "setup of misc vector failed: %d\n", err);
7700                         goto err_vsis;
7701                 }
7702         }
7703
7704         /* prep for VF support */
7705         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
7706             (pf->flags & I40E_FLAG_MSIX_ENABLED)) {
7707                 u32 val;
7708
7709                 /* disable link interrupts for VFs */
7710                 val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
7711                 val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
7712                 wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
7713                 i40e_flush(hw);
7714         }
7715
7716         pfs_found++;
7717
7718         i40e_dbg_pf_init(pf);
7719
7720         /* tell the firmware that we're starting */
7721         dv.major_version = DRV_VERSION_MAJOR;
7722         dv.minor_version = DRV_VERSION_MINOR;
7723         dv.build_version = DRV_VERSION_BUILD;
7724         dv.subbuild_version = 0;
7725         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
7726
7727         /* since everything's happy, start the service_task timer */
7728         mod_timer(&pf->service_timer,
7729                   round_jiffies(jiffies + pf->service_timer_period));
7730
7731         /* Get the negotiated link width and speed from PCI config space */
7732         pcie_capability_read_word(pf->pdev, PCI_EXP_LNKSTA, &link_status);
7733
7734         i40e_set_pci_config_data(hw, link_status);
7735
7736         dev_info(&pdev->dev, "PCI Express: %s %s\n",
7737                 (hw->bus.speed == i40e_bus_speed_8000 ? "Speed 8.0GT/s" :
7738                  hw->bus.speed == i40e_bus_speed_5000 ? "Speed 5.0GT/s" :
7739                  hw->bus.speed == i40e_bus_speed_2500 ? "Speed 2.5GT/s" :
7740                  "Unknown"),
7741                 (hw->bus.width == i40e_bus_width_pcie_x8 ? "Width x8" :
7742                  hw->bus.width == i40e_bus_width_pcie_x4 ? "Width x4" :
7743                  hw->bus.width == i40e_bus_width_pcie_x2 ? "Width x2" :
7744                  hw->bus.width == i40e_bus_width_pcie_x1 ? "Width x1" :
7745                  "Unknown"));
7746
7747         if (hw->bus.width < i40e_bus_width_pcie_x8 ||
7748             hw->bus.speed < i40e_bus_speed_8000) {
7749                 dev_warn(&pdev->dev, "PCI-Express bandwidth available for this device may be insufficient for optimal performance.\n");
7750                 dev_warn(&pdev->dev, "Please move the device to a different PCI-e link with more lanes and/or higher transfer rate.\n");
7751         }
7752
7753         return 0;
7754
7755         /* Unwind what we've done if something failed in the setup */
7756 err_vsis:
7757         set_bit(__I40E_DOWN, &pf->state);
7758         i40e_clear_interrupt_scheme(pf);
7759         kfree(pf->vsi);
7760 err_switch_setup:
7761         i40e_reset_interrupt_capability(pf);
7762         del_timer_sync(&pf->service_timer);
7763 err_mac_addr:
7764 err_configure_lan_hmc:
7765         (void)i40e_shutdown_lan_hmc(hw);
7766 err_init_lan_hmc:
7767         kfree(pf->qp_pile);
7768         kfree(pf->irq_pile);
7769 err_sw_init:
7770 err_adminq_setup:
7771         (void)i40e_shutdown_adminq(hw);
7772 err_pf_reset:
7773         iounmap(hw->hw_addr);
7774 err_ioremap:
7775         kfree(pf);
7776 err_pf_alloc:
7777         pci_disable_pcie_error_reporting(pdev);
7778         pci_release_selected_regions(pdev,
7779                                      pci_select_bars(pdev, IORESOURCE_MEM));
7780 err_pci_reg:
7781 err_dma:
7782         pci_disable_device(pdev);
7783         return err;
7784 }
7785
7786 /**
7787  * i40e_remove - Device removal routine
7788  * @pdev: PCI device information struct
7789  *
7790  * i40e_remove is called by the PCI subsystem to alert the driver
7791  * that is should release a PCI device.  This could be caused by a
7792  * Hot-Plug event, or because the driver is going to be removed from
7793  * memory.
7794  **/
7795 static void i40e_remove(struct pci_dev *pdev)
7796 {
7797         struct i40e_pf *pf = pci_get_drvdata(pdev);
7798         i40e_status ret_code;
7799         u32 reg;
7800         int i;
7801
7802         i40e_dbg_pf_exit(pf);
7803
7804         if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
7805                 i40e_free_vfs(pf);
7806                 pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
7807         }
7808
7809         /* no more scheduling of any task */
7810         set_bit(__I40E_DOWN, &pf->state);
7811         del_timer_sync(&pf->service_timer);
7812         cancel_work_sync(&pf->service_task);
7813
7814         i40e_fdir_teardown(pf);
7815
7816         /* If there is a switch structure or any orphans, remove them.
7817          * This will leave only the PF's VSI remaining.
7818          */
7819         for (i = 0; i < I40E_MAX_VEB; i++) {
7820                 if (!pf->veb[i])
7821                         continue;
7822
7823                 if (pf->veb[i]->uplink_seid == pf->mac_seid ||
7824                     pf->veb[i]->uplink_seid == 0)
7825                         i40e_switch_branch_release(pf->veb[i]);
7826         }
7827
7828         /* Now we can shutdown the PF's VSI, just before we kill
7829          * adminq and hmc.
7830          */
7831         if (pf->vsi[pf->lan_vsi])
7832                 i40e_vsi_release(pf->vsi[pf->lan_vsi]);
7833
7834         i40e_stop_misc_vector(pf);
7835         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
7836                 synchronize_irq(pf->msix_entries[0].vector);
7837                 free_irq(pf->msix_entries[0].vector, pf);
7838         }
7839
7840         /* shutdown and destroy the HMC */
7841         ret_code = i40e_shutdown_lan_hmc(&pf->hw);
7842         if (ret_code)
7843                 dev_warn(&pdev->dev,
7844                          "Failed to destroy the HMC resources: %d\n", ret_code);
7845
7846         /* shutdown the adminq */
7847         ret_code = i40e_shutdown_adminq(&pf->hw);
7848         if (ret_code)
7849                 dev_warn(&pdev->dev,
7850                          "Failed to destroy the Admin Queue resources: %d\n",
7851                          ret_code);
7852
7853         /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
7854         i40e_clear_interrupt_scheme(pf);
7855         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7856                 if (pf->vsi[i]) {
7857                         i40e_vsi_clear_rings(pf->vsi[i]);
7858                         i40e_vsi_clear(pf->vsi[i]);
7859                         pf->vsi[i] = NULL;
7860                 }
7861         }
7862
7863         for (i = 0; i < I40E_MAX_VEB; i++) {
7864                 kfree(pf->veb[i]);
7865                 pf->veb[i] = NULL;
7866         }
7867
7868         kfree(pf->qp_pile);
7869         kfree(pf->irq_pile);
7870         kfree(pf->sw_config);
7871         kfree(pf->vsi);
7872
7873         /* force a PF reset to clean anything leftover */
7874         reg = rd32(&pf->hw, I40E_PFGEN_CTRL);
7875         wr32(&pf->hw, I40E_PFGEN_CTRL, (reg | I40E_PFGEN_CTRL_PFSWR_MASK));
7876         i40e_flush(&pf->hw);
7877
7878         iounmap(pf->hw.hw_addr);
7879         kfree(pf);
7880         pci_release_selected_regions(pdev,
7881                                      pci_select_bars(pdev, IORESOURCE_MEM));
7882
7883         pci_disable_pcie_error_reporting(pdev);
7884         pci_disable_device(pdev);
7885 }
7886
7887 /**
7888  * i40e_pci_error_detected - warning that something funky happened in PCI land
7889  * @pdev: PCI device information struct
7890  *
7891  * Called to warn that something happened and the error handling steps
7892  * are in progress.  Allows the driver to quiesce things, be ready for
7893  * remediation.
7894  **/
7895 static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
7896                                                 enum pci_channel_state error)
7897 {
7898         struct i40e_pf *pf = pci_get_drvdata(pdev);
7899
7900         dev_info(&pdev->dev, "%s: error %d\n", __func__, error);
7901
7902         /* shutdown all operations */
7903         if (!test_bit(__I40E_SUSPENDED, &pf->state)) {
7904                 rtnl_lock();
7905                 i40e_prep_for_reset(pf);
7906                 rtnl_unlock();
7907         }
7908
7909         /* Request a slot reset */
7910         return PCI_ERS_RESULT_NEED_RESET;
7911 }
7912
7913 /**
7914  * i40e_pci_error_slot_reset - a PCI slot reset just happened
7915  * @pdev: PCI device information struct
7916  *
7917  * Called to find if the driver can work with the device now that
7918  * the pci slot has been reset.  If a basic connection seems good
7919  * (registers are readable and have sane content) then return a
7920  * happy little PCI_ERS_RESULT_xxx.
7921  **/
7922 static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
7923 {
7924         struct i40e_pf *pf = pci_get_drvdata(pdev);
7925         pci_ers_result_t result;
7926         int err;
7927         u32 reg;
7928
7929         dev_info(&pdev->dev, "%s\n", __func__);
7930         if (pci_enable_device_mem(pdev)) {
7931                 dev_info(&pdev->dev,
7932                          "Cannot re-enable PCI device after reset.\n");
7933                 result = PCI_ERS_RESULT_DISCONNECT;
7934         } else {
7935                 pci_set_master(pdev);
7936                 pci_restore_state(pdev);
7937                 pci_save_state(pdev);
7938                 pci_wake_from_d3(pdev, false);
7939
7940                 reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
7941                 if (reg == 0)
7942                         result = PCI_ERS_RESULT_RECOVERED;
7943                 else
7944                         result = PCI_ERS_RESULT_DISCONNECT;
7945         }
7946
7947         err = pci_cleanup_aer_uncorrect_error_status(pdev);
7948         if (err) {
7949                 dev_info(&pdev->dev,
7950                          "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
7951                          err);
7952                 /* non-fatal, continue */
7953         }
7954
7955         return result;
7956 }
7957
7958 /**
7959  * i40e_pci_error_resume - restart operations after PCI error recovery
7960  * @pdev: PCI device information struct
7961  *
7962  * Called to allow the driver to bring things back up after PCI error
7963  * and/or reset recovery has finished.
7964  **/
7965 static void i40e_pci_error_resume(struct pci_dev *pdev)
7966 {
7967         struct i40e_pf *pf = pci_get_drvdata(pdev);
7968
7969         dev_info(&pdev->dev, "%s\n", __func__);
7970         if (test_bit(__I40E_SUSPENDED, &pf->state))
7971                 return;
7972
7973         rtnl_lock();
7974         i40e_handle_reset_warning(pf);
7975         rtnl_lock();
7976 }
7977
7978 /**
7979  * i40e_shutdown - PCI callback for shutting down
7980  * @pdev: PCI device information struct
7981  **/
7982 static void i40e_shutdown(struct pci_dev *pdev)
7983 {
7984         struct i40e_pf *pf = pci_get_drvdata(pdev);
7985         struct i40e_hw *hw = &pf->hw;
7986
7987         set_bit(__I40E_SUSPENDED, &pf->state);
7988         set_bit(__I40E_DOWN, &pf->state);
7989         rtnl_lock();
7990         i40e_prep_for_reset(pf);
7991         rtnl_unlock();
7992
7993         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
7994         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
7995
7996         if (system_state == SYSTEM_POWER_OFF) {
7997                 pci_wake_from_d3(pdev, pf->wol_en);
7998                 pci_set_power_state(pdev, PCI_D3hot);
7999         }
8000 }
8001
8002 #ifdef CONFIG_PM
8003 /**
8004  * i40e_suspend - PCI callback for moving to D3
8005  * @pdev: PCI device information struct
8006  **/
8007 static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
8008 {
8009         struct i40e_pf *pf = pci_get_drvdata(pdev);
8010         struct i40e_hw *hw = &pf->hw;
8011
8012         set_bit(__I40E_SUSPENDED, &pf->state);
8013         set_bit(__I40E_DOWN, &pf->state);
8014         rtnl_lock();
8015         i40e_prep_for_reset(pf);
8016         rtnl_unlock();
8017
8018         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
8019         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
8020
8021         pci_wake_from_d3(pdev, pf->wol_en);
8022         pci_set_power_state(pdev, PCI_D3hot);
8023
8024         return 0;
8025 }
8026
8027 /**
8028  * i40e_resume - PCI callback for waking up from D3
8029  * @pdev: PCI device information struct
8030  **/
8031 static int i40e_resume(struct pci_dev *pdev)
8032 {
8033         struct i40e_pf *pf = pci_get_drvdata(pdev);
8034         u32 err;
8035
8036         pci_set_power_state(pdev, PCI_D0);
8037         pci_restore_state(pdev);
8038         /* pci_restore_state() clears dev->state_saves, so
8039          * call pci_save_state() again to restore it.
8040          */
8041         pci_save_state(pdev);
8042
8043         err = pci_enable_device_mem(pdev);
8044         if (err) {
8045                 dev_err(&pdev->dev,
8046                         "%s: Cannot enable PCI device from suspend\n",
8047                         __func__);
8048                 return err;
8049         }
8050         pci_set_master(pdev);
8051
8052         /* no wakeup events while running */
8053         pci_wake_from_d3(pdev, false);
8054
8055         /* handling the reset will rebuild the device state */
8056         if (test_and_clear_bit(__I40E_SUSPENDED, &pf->state)) {
8057                 clear_bit(__I40E_DOWN, &pf->state);
8058                 rtnl_lock();
8059                 i40e_reset_and_rebuild(pf, false);
8060                 rtnl_unlock();
8061         }
8062
8063         return 0;
8064 }
8065
8066 #endif
8067 static const struct pci_error_handlers i40e_err_handler = {
8068         .error_detected = i40e_pci_error_detected,
8069         .slot_reset = i40e_pci_error_slot_reset,
8070         .resume = i40e_pci_error_resume,
8071 };
8072
8073 static struct pci_driver i40e_driver = {
8074         .name     = i40e_driver_name,
8075         .id_table = i40e_pci_tbl,
8076         .probe    = i40e_probe,
8077         .remove   = i40e_remove,
8078 #ifdef CONFIG_PM
8079         .suspend  = i40e_suspend,
8080         .resume   = i40e_resume,
8081 #endif
8082         .shutdown = i40e_shutdown,
8083         .err_handler = &i40e_err_handler,
8084         .sriov_configure = i40e_pci_sriov_configure,
8085 };
8086
8087 /**
8088  * i40e_init_module - Driver registration routine
8089  *
8090  * i40e_init_module is the first routine called when the driver is
8091  * loaded. All it does is register with the PCI subsystem.
8092  **/
8093 static int __init i40e_init_module(void)
8094 {
8095         pr_info("%s: %s - version %s\n", i40e_driver_name,
8096                 i40e_driver_string, i40e_driver_version_str);
8097         pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);
8098         i40e_dbg_init();
8099         return pci_register_driver(&i40e_driver);
8100 }
8101 module_init(i40e_init_module);
8102
8103 /**
8104  * i40e_exit_module - Driver exit cleanup routine
8105  *
8106  * i40e_exit_module is called just before the driver is removed
8107  * from memory.
8108  **/
8109 static void __exit i40e_exit_module(void)
8110 {
8111         pci_unregister_driver(&i40e_driver);
8112         i40e_dbg_exit();
8113 }
8114 module_exit(i40e_exit_module);