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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 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 with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in
  20  * the file called "COPYING".
  21  *
  22  * Contact Information:
  23  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25  *
  26  ******************************************************************************/
  27
  28 /* Local includes */
  29 #include "i40e.h"
  30
  31 const char i40e_driver_name[] = "i40e";
  32 static const char i40e_driver_string[] =
  33                         "Intel(R) Ethernet Connection XL710 Network Driver";
  34
  35 #define DRV_KERN "-k"
  36
  37 #define DRV_VERSION_MAJOR 0
  38 #define DRV_VERSION_MINOR 3
  39 #define DRV_VERSION_BUILD 10
  40 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  41              __stringify(DRV_VERSION_MINOR) "." \
  42              __stringify(DRV_VERSION_BUILD)    DRV_KERN
  43 const char i40e_driver_version_str[] = DRV_VERSION;
  44 static const char i40e_copyright[] = "Copyright (c) 2013 Intel Corporation.";
  45
  46 /* a bit of forward declarations */
  47 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
  48 static void i40e_handle_reset_warning(struct i40e_pf *pf);
  49 static int i40e_add_vsi(struct i40e_vsi *vsi);
  50 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
  51 static int i40e_setup_pf_switch(struct i40e_pf *pf);
  52 static int i40e_setup_misc_vector(struct i40e_pf *pf);
  53 static void i40e_determine_queue_usage(struct i40e_pf *pf);
  54 static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
  55
  56 /* i40e_pci_tbl - PCI Device ID Table
  57  *
  58  * Last entry must be all 0s
  59  *
  60  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  61  *   Class, Class Mask, private data (not used) }
  62  */
  63 static DEFINE_PCI_DEVICE_TABLE(i40e_pci_tbl) = {
  64         {PCI_VDEVICE(INTEL, I40E_SFP_XL710_DEVICE_ID), 0},
  65         {PCI_VDEVICE(INTEL, I40E_SFP_X710_DEVICE_ID), 0},
  66         {PCI_VDEVICE(INTEL, I40E_QEMU_DEVICE_ID), 0},
  67         {PCI_VDEVICE(INTEL, I40E_KX_A_DEVICE_ID), 0},
  68         {PCI_VDEVICE(INTEL, I40E_KX_B_DEVICE_ID), 0},
  69         {PCI_VDEVICE(INTEL, I40E_KX_C_DEVICE_ID), 0},
  70         {PCI_VDEVICE(INTEL, I40E_KX_D_DEVICE_ID), 0},
  71         {PCI_VDEVICE(INTEL, I40E_QSFP_A_DEVICE_ID), 0},
  72         {PCI_VDEVICE(INTEL, I40E_QSFP_B_DEVICE_ID), 0},
  73         {PCI_VDEVICE(INTEL, I40E_QSFP_C_DEVICE_ID), 0},
  74         /* required last entry */
  75         {0, }
  76 };
  77 MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);
  78
  79 #define I40E_MAX_VF_COUNT 128
  80 static int debug = -1;
  81 module_param(debug, int, 0);
  82 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  83
  84 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
  85 MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(DRV_VERSION);
  88
  89 /**
  90  * i40e_allocate_dma_mem_d - OS specific memory alloc for shared code
  91  * @hw:   pointer to the HW structure
  92  * @mem:  ptr to mem struct to fill out
  93  * @size: size of memory requested
  94  * @alignment: what to align the allocation to
  95  **/
  96 int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
  97                             u64 size, u32 alignment)
  98 {
  99         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 100
 101         mem->size = ALIGN(size, alignment);
 102         mem->va = dma_zalloc_coherent(&pf->pdev->dev, mem->size,
 103                                       &mem->pa, GFP_KERNEL);
 104         if (!mem->va)
 105                 return -ENOMEM;
 106
 107         return 0;
 108 }
 109
 110 /**
 111  * i40e_free_dma_mem_d - OS specific memory free for shared code
 112  * @hw:   pointer to the HW structure
 113  * @mem:  ptr to mem struct to free
 114  **/
 115 int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 116 {
 117         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 118
 119         dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
 120         mem->va = NULL;
 121         mem->pa = 0;
 122         mem->size = 0;
 123
 124         return 0;
 125 }
 126
 127 /**
 128  * i40e_allocate_virt_mem_d - OS specific memory alloc for shared code
 129  * @hw:   pointer to the HW structure
 130  * @mem:  ptr to mem struct to fill out
 131  * @size: size of memory requested
 132  **/
 133 int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
 134                              u32 size)
 135 {
 136         mem->size = size;
 137         mem->va = kzalloc(size, GFP_KERNEL);
 138
 139         if (!mem->va)
 140                 return -ENOMEM;
 141
 142         return 0;
 143 }
 144
 145 /**
 146  * i40e_free_virt_mem_d - OS specific memory free for shared code
 147  * @hw:   pointer to the HW structure
 148  * @mem:  ptr to mem struct to free
 149  **/
 150 int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
 151 {
 152         /* it's ok to kfree a NULL pointer */
 153         kfree(mem->va);
 154         mem->va = NULL;
 155         mem->size = 0;
 156
 157         return 0;
 158 }
 159
 160 /**
 161  * i40e_get_lump - find a lump of free generic resource
 162  * @pf: board private structure
 163  * @pile: the pile of resource to search
 164  * @needed: the number of items needed
 165  * @id: an owner id to stick on the items assigned
 166  *
 167  * Returns the base item index of the lump, or negative for error
 168  *
 169  * The search_hint trick and lack of advanced fit-finding only work
 170  * because we're highly likely to have all the same size lump requests.
 171  * Linear search time and any fragmentation should be minimal.
 172  **/
 173 static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
 174                          u16 needed, u16 id)
 175 {
 176         int ret = -ENOMEM;
 177         int i, j;
 178
 179         if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
 180                 dev_info(&pf->pdev->dev,
 181                          "param err: pile=%p needed=%d id=0x%04x\n",
 182                          pile, needed, id);
 183                 return -EINVAL;
 184         }
 185
 186         /* start the linear search with an imperfect hint */
 187         i = pile->search_hint;
 188         while (i < pile->num_entries) {
 189                 /* skip already allocated entries */
 190                 if (pile->list[i] & I40E_PILE_VALID_BIT) {
 191                         i++;
 192                         continue;
 193                 }
 194
 195                 /* do we have enough in this lump? */
 196                 for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
 197                         if (pile->list[i+j] & I40E_PILE_VALID_BIT)
 198                                 break;
 199                 }
 200
 201                 if (j == needed) {
 202                         /* there was enough, so assign it to the requestor */
 203                         for (j = 0; j < needed; j++)
 204                                 pile->list[i+j] = id | I40E_PILE_VALID_BIT;
 205                         ret = i;
 206                         pile->search_hint = i + j;
 207                         break;
 208                 } else {
 209                         /* not enough, so skip over it and continue looking */
 210                         i += j;
 211                 }
 212         }
 213
 214         return ret;
 215 }
 216
 217 /**
 218  * i40e_put_lump - return a lump of generic resource
 219  * @pile: the pile of resource to search
 220  * @index: the base item index
 221  * @id: the owner id of the items assigned
 222  *
 223  * Returns the count of items in the lump
 224  **/
 225 static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
 226 {
 227         int valid_id = (id | I40E_PILE_VALID_BIT);
 228         int count = 0;
 229         int i;
 230
 231         if (!pile || index >= pile->num_entries)
 232                 return -EINVAL;
 233
 234         for (i = index;
 235              i < pile->num_entries && pile->list[i] == valid_id;
 236              i++) {
 237                 pile->list[i] = 0;
 238                 count++;
 239         }
 240
 241         if (count && index < pile->search_hint)
 242                 pile->search_hint = index;
 243
 244         return count;
 245 }
 246
 247 /**
 248  * i40e_service_event_schedule - Schedule the service task to wake up
 249  * @pf: board private structure
 250  *
 251  * If not already scheduled, this puts the task into the work queue
 252  **/
 253 static void i40e_service_event_schedule(struct i40e_pf *pf)
 254 {
 255         if (!test_bit(__I40E_DOWN, &pf->state) &&
 256             !test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state) &&
 257             !test_and_set_bit(__I40E_SERVICE_SCHED, &pf->state))
 258                 schedule_work(&pf->service_task);
 259 }
 260
 261 /**
 262  * i40e_tx_timeout - Respond to a Tx Hang
 263  * @netdev: network interface device structure
 264  *
 265  * If any port has noticed a Tx timeout, it is likely that the whole
 266  * device is munged, not just the one netdev port, so go for the full
 267  * reset.
 268  **/
 269 static void i40e_tx_timeout(struct net_device *netdev)
 270 {
 271         struct i40e_netdev_priv *np = netdev_priv(netdev);
 272         struct i40e_vsi *vsi = np->vsi;
 273         struct i40e_pf *pf = vsi->back;
 274
 275         pf->tx_timeout_count++;
 276
 277         if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
 278                 pf->tx_timeout_recovery_level = 0;
 279         pf->tx_timeout_last_recovery = jiffies;
 280         netdev_info(netdev, "tx_timeout recovery level %d\n",
 281                     pf->tx_timeout_recovery_level);
 282
 283         switch (pf->tx_timeout_recovery_level) {
 284         case 0:
 285                 /* disable and re-enable queues for the VSI */
 286                 if (in_interrupt()) {
 287                         set_bit(__I40E_REINIT_REQUESTED, &pf->state);
 288                         set_bit(__I40E_REINIT_REQUESTED, &vsi->state);
 289                 } else {
 290                         i40e_vsi_reinit_locked(vsi);
 291                 }
 292                 break;
 293         case 1:
 294                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 295                 break;
 296         case 2:
 297                 set_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
 298                 break;
 299         case 3:
 300                 set_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
 301                 break;
 302         default:
 303                 netdev_err(netdev, "tx_timeout recovery unsuccessful\n");
 304                 i40e_down(vsi);
 305                 break;
 306         }
 307         i40e_service_event_schedule(pf);
 308         pf->tx_timeout_recovery_level++;
 309 }
 310
 311 /**
 312  * i40e_release_rx_desc - Store the new tail and head values
 313  * @rx_ring: ring to bump
 314  * @val: new head index
 315  **/
 316 static inline void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val)
 317 {
 318         rx_ring->next_to_use = val;
 319
 320         /* Force memory writes to complete before letting h/w
 321          * know there are new descriptors to fetch.  (Only
 322          * applicable for weak-ordered memory model archs,
 323          * such as IA-64).
 324          */
 325         wmb();
 326         writel(val, rx_ring->tail);
 327 }
 328
 329 /**
 330  * i40e_get_vsi_stats_struct - Get System Network Statistics
 331  * @vsi: the VSI we care about
 332  *
 333  * Returns the address of the device statistics structure.
 334  * The statistics are actually updated from the service task.
 335  **/
 336 struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
 337 {
 338         return &vsi->net_stats;
 339 }
 340
 341 /**
 342  * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 343  * @netdev: network interface device structure
 344  *
 345  * Returns the address of the device statistics structure.
 346  * The statistics are actually updated from the service task.
 347  **/
 348 static struct rtnl_link_stats64 *i40e_get_netdev_stats_struct(
 349                                              struct net_device *netdev,
 350                                              struct rtnl_link_stats64 *stats)
 351 {
 352         struct i40e_netdev_priv *np = netdev_priv(netdev);
 353         struct i40e_vsi *vsi = np->vsi;
 354         struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
 355         int i;
 356
 357         rcu_read_lock();
 358         for (i = 0; i < vsi->num_queue_pairs; i++) {
 359                 struct i40e_ring *tx_ring, *rx_ring;
 360                 u64 bytes, packets;
 361                 unsigned int start;
 362
 363                 tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
 364                 if (!tx_ring)
 365                         continue;
 366
 367                 do {
 368                         start = u64_stats_fetch_begin_bh(&tx_ring->syncp);
 369                         packets = tx_ring->stats.packets;
 370                         bytes   = tx_ring->stats.bytes;
 371                 } while (u64_stats_fetch_retry_bh(&tx_ring->syncp, start));
 372
 373                 stats->tx_packets += packets;
 374                 stats->tx_bytes   += bytes;
 375                 rx_ring = &tx_ring[1];
 376
 377                 do {
 378                         start = u64_stats_fetch_begin_bh(&rx_ring->syncp);
 379                         packets = rx_ring->stats.packets;
 380                         bytes   = rx_ring->stats.bytes;
 381                 } while (u64_stats_fetch_retry_bh(&rx_ring->syncp, start));
 382
 383                 stats->rx_packets += packets;
 384                 stats->rx_bytes   += bytes;
 385         }
 386         rcu_read_unlock();
 387
 388         /* following stats updated by ixgbe_watchdog_task() */
 389         stats->multicast        = vsi_stats->multicast;
 390         stats->tx_errors        = vsi_stats->tx_errors;
 391         stats->tx_dropped       = vsi_stats->tx_dropped;
 392         stats->rx_errors        = vsi_stats->rx_errors;
 393         stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
 394         stats->rx_length_errors = vsi_stats->rx_length_errors;
 395
 396         return stats;
 397 }
 398
 399 /**
 400  * i40e_vsi_reset_stats - Resets all stats of the given vsi
 401  * @vsi: the VSI to have its stats reset
 402  **/
 403 void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
 404 {
 405         struct rtnl_link_stats64 *ns;
 406         int i;
 407
 408         if (!vsi)
 409                 return;
 410
 411         ns = i40e_get_vsi_stats_struct(vsi);
 412         memset(ns, 0, sizeof(*ns));
 413         memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
 414         memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
 415         memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
 416         if (vsi->rx_rings)
 417                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 418                         memset(&vsi->rx_rings[i]->stats, 0 ,
 419                                sizeof(vsi->rx_rings[i]->stats));
 420                         memset(&vsi->rx_rings[i]->rx_stats, 0 ,
 421                                sizeof(vsi->rx_rings[i]->rx_stats));
 422                         memset(&vsi->tx_rings[i]->stats, 0 ,
 423                                sizeof(vsi->tx_rings[i]->stats));
 424                         memset(&vsi->tx_rings[i]->tx_stats, 0,
 425                                sizeof(vsi->tx_rings[i]->tx_stats));
 426                 }
 427         vsi->stat_offsets_loaded = false;
 428 }
 429
 430 /**
 431  * i40e_pf_reset_stats - Reset all of the stats for the given pf
 432  * @pf: the PF to be reset
 433  **/
 434 void i40e_pf_reset_stats(struct i40e_pf *pf)
 435 {
 436         memset(&pf->stats, 0, sizeof(pf->stats));
 437         memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
 438         pf->stat_offsets_loaded = false;
 439 }
 440
 441 /**
 442  * i40e_stat_update48 - read and update a 48 bit stat from the chip
 443  * @hw: ptr to the hardware info
 444  * @hireg: the high 32 bit reg to read
 445  * @loreg: the low 32 bit reg to read
 446  * @offset_loaded: has the initial offset been loaded yet
 447  * @offset: ptr to current offset value
 448  * @stat: ptr to the stat
 449  *
 450  * Since the device stats are not reset at PFReset, they likely will not
 451  * be zeroed when the driver starts.  We'll save the first values read
 452  * and use them as offsets to be subtracted from the raw values in order
 453  * to report stats that count from zero.  In the process, we also manage
 454  * the potential roll-over.
 455  **/
 456 static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
 457                                bool offset_loaded, u64 *offset, u64 *stat)
 458 {
 459         u64 new_data;
 460
 461         if (hw->device_id == I40E_QEMU_DEVICE_ID) {
 462                 new_data = rd32(hw, loreg);
 463                 new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
 464         } else {
 465                 new_data = rd64(hw, loreg);
 466         }
 467         if (!offset_loaded)
 468                 *offset = new_data;
 469         if (likely(new_data >= *offset))
 470                 *stat = new_data - *offset;
 471         else
 472                 *stat = (new_data + ((u64)1 << 48)) - *offset;
 473         *stat &= 0xFFFFFFFFFFFFULL;
 474 }
 475
 476 /**
 477  * i40e_stat_update32 - read and update a 32 bit stat from the chip
 478  * @hw: ptr to the hardware info
 479  * @reg: the hw reg to read
 480  * @offset_loaded: has the initial offset been loaded yet
 481  * @offset: ptr to current offset value
 482  * @stat: ptr to the stat
 483  **/
 484 static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
 485                                bool offset_loaded, u64 *offset, u64 *stat)
 486 {
 487         u32 new_data;
 488
 489         new_data = rd32(hw, reg);
 490         if (!offset_loaded)
 491                 *offset = new_data;
 492         if (likely(new_data >= *offset))
 493                 *stat = (u32)(new_data - *offset);
 494         else
 495                 *stat = (u32)((new_data + ((u64)1 << 32)) - *offset);
 496 }
 497
 498 /**
 499  * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 500  * @vsi: the VSI to be updated
 501  **/
 502 void i40e_update_eth_stats(struct i40e_vsi *vsi)
 503 {
 504         int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
 505         struct i40e_pf *pf = vsi->back;
 506         struct i40e_hw *hw = &pf->hw;
 507         struct i40e_eth_stats *oes;
 508         struct i40e_eth_stats *es;     /* device's eth stats */
 509
 510         es = &vsi->eth_stats;
 511         oes = &vsi->eth_stats_offsets;
 512
 513         /* Gather up the stats that the hw collects */
 514         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 515                            vsi->stat_offsets_loaded,
 516                            &oes->tx_errors, &es->tx_errors);
 517         i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx),
 518                            vsi->stat_offsets_loaded,
 519                            &oes->rx_discards, &es->rx_discards);
 520
 521         i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
 522                            I40E_GLV_GORCL(stat_idx),
 523                            vsi->stat_offsets_loaded,
 524                            &oes->rx_bytes, &es->rx_bytes);
 525         i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
 526                            I40E_GLV_UPRCL(stat_idx),
 527                            vsi->stat_offsets_loaded,
 528                            &oes->rx_unicast, &es->rx_unicast);
 529         i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
 530                            I40E_GLV_MPRCL(stat_idx),
 531                            vsi->stat_offsets_loaded,
 532                            &oes->rx_multicast, &es->rx_multicast);
 533         i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
 534                            I40E_GLV_BPRCL(stat_idx),
 535                            vsi->stat_offsets_loaded,
 536                            &oes->rx_broadcast, &es->rx_broadcast);
 537
 538         i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
 539                            I40E_GLV_GOTCL(stat_idx),
 540                            vsi->stat_offsets_loaded,
 541                            &oes->tx_bytes, &es->tx_bytes);
 542         i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
 543                            I40E_GLV_UPTCL(stat_idx),
 544                            vsi->stat_offsets_loaded,
 545                            &oes->tx_unicast, &es->tx_unicast);
 546         i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
 547                            I40E_GLV_MPTCL(stat_idx),
 548                            vsi->stat_offsets_loaded,
 549                            &oes->tx_multicast, &es->tx_multicast);
 550         i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
 551                            I40E_GLV_BPTCL(stat_idx),
 552                            vsi->stat_offsets_loaded,
 553                            &oes->tx_broadcast, &es->tx_broadcast);
 554         vsi->stat_offsets_loaded = true;
 555 }
 556
 557 /**
 558  * i40e_update_veb_stats - Update Switch component statistics
 559  * @veb: the VEB being updated
 560  **/
 561 static void i40e_update_veb_stats(struct i40e_veb *veb)
 562 {
 563         struct i40e_pf *pf = veb->pf;
 564         struct i40e_hw *hw = &pf->hw;
 565         struct i40e_eth_stats *oes;
 566         struct i40e_eth_stats *es;     /* device's eth stats */
 567         int idx = 0;
 568
 569         idx = veb->stats_idx;
 570         es = &veb->stats;
 571         oes = &veb->stats_offsets;
 572
 573         /* Gather up the stats that the hw collects */
 574         i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
 575                            veb->stat_offsets_loaded,
 576                            &oes->tx_discards, &es->tx_discards);
 577         i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
 578                            veb->stat_offsets_loaded,
 579                            &oes->rx_unknown_protocol, &es->rx_unknown_protocol);
 580
 581         i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
 582                            veb->stat_offsets_loaded,
 583                            &oes->rx_bytes, &es->rx_bytes);
 584         i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
 585                            veb->stat_offsets_loaded,
 586                            &oes->rx_unicast, &es->rx_unicast);
 587         i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
 588                            veb->stat_offsets_loaded,
 589                            &oes->rx_multicast, &es->rx_multicast);
 590         i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
 591                            veb->stat_offsets_loaded,
 592                            &oes->rx_broadcast, &es->rx_broadcast);
 593
 594         i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
 595                            veb->stat_offsets_loaded,
 596                            &oes->tx_bytes, &es->tx_bytes);
 597         i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
 598                            veb->stat_offsets_loaded,
 599                            &oes->tx_unicast, &es->tx_unicast);
 600         i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
 601                            veb->stat_offsets_loaded,
 602                            &oes->tx_multicast, &es->tx_multicast);
 603         i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
 604                            veb->stat_offsets_loaded,
 605                            &oes->tx_broadcast, &es->tx_broadcast);
 606         veb->stat_offsets_loaded = true;
 607 }
 608
 609 /**
 610  * i40e_update_link_xoff_rx - Update XOFF received in link flow control mode
 611  * @pf: the corresponding PF
 612  *
 613  * Update the Rx XOFF counter (PAUSE frames) in link flow control mode
 614  **/
 615 static void i40e_update_link_xoff_rx(struct i40e_pf *pf)
 616 {
 617         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 618         struct i40e_hw_port_stats *nsd = &pf->stats;
 619         struct i40e_hw *hw = &pf->hw;
 620         u64 xoff = 0;
 621         u16 i, v;
 622
 623         if ((hw->fc.current_mode != I40E_FC_FULL) &&
 624             (hw->fc.current_mode != I40E_FC_RX_PAUSE))
 625                 return;
 626
 627         xoff = nsd->link_xoff_rx;
 628         i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
 629                            pf->stat_offsets_loaded,
 630                            &osd->link_xoff_rx, &nsd->link_xoff_rx);
 631
 632         /* No new LFC xoff rx */
 633         if (!(nsd->link_xoff_rx - xoff))
 634                 return;
 635
 636         /* Clear the __I40E_HANG_CHECK_ARMED bit for all Tx rings */
 637         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 638                 struct i40e_vsi *vsi = pf->vsi[v];
 639
 640                 if (!vsi)
 641                         continue;
 642
 643                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 644                         struct i40e_ring *ring = vsi->tx_rings[i];
 645                         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
 646                 }
 647         }
 648 }
 649
 650 /**
 651  * i40e_update_prio_xoff_rx - Update XOFF received in PFC mode
 652  * @pf: the corresponding PF
 653  *
 654  * Update the Rx XOFF counter (PAUSE frames) in PFC mode
 655  **/
 656 static void i40e_update_prio_xoff_rx(struct i40e_pf *pf)
 657 {
 658         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 659         struct i40e_hw_port_stats *nsd = &pf->stats;
 660         bool xoff[I40E_MAX_TRAFFIC_CLASS] = {false};
 661         struct i40e_dcbx_config *dcb_cfg;
 662         struct i40e_hw *hw = &pf->hw;
 663         u16 i, v;
 664         u8 tc;
 665
 666         dcb_cfg = &hw->local_dcbx_config;
 667
 668         /* See if DCB enabled with PFC TC */
 669         if (!(pf->flags & I40E_FLAG_DCB_ENABLED) ||
 670             !(dcb_cfg->pfc.pfcenable)) {
 671                 i40e_update_link_xoff_rx(pf);
 672                 return;
 673         }
 674
 675         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
 676                 u64 prio_xoff = nsd->priority_xoff_rx[i];
 677                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
 678                                    pf->stat_offsets_loaded,
 679                                    &osd->priority_xoff_rx[i],
 680                                    &nsd->priority_xoff_rx[i]);
 681
 682                 /* No new PFC xoff rx */
 683                 if (!(nsd->priority_xoff_rx[i] - prio_xoff))
 684                         continue;
 685                 /* Get the TC for given priority */
 686                 tc = dcb_cfg->etscfg.prioritytable[i];
 687                 xoff[tc] = true;
 688         }
 689
 690         /* Clear the __I40E_HANG_CHECK_ARMED bit for Tx rings */
 691         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 692                 struct i40e_vsi *vsi = pf->vsi[v];
 693
 694                 if (!vsi)
 695                         continue;
 696
 697                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 698                         struct i40e_ring *ring = vsi->tx_rings[i];
 699
 700                         tc = ring->dcb_tc;
 701                         if (xoff[tc])
 702                                 clear_bit(__I40E_HANG_CHECK_ARMED,
 703                                           &ring->state);
 704                 }
 705         }
 706 }
 707
 708 /**
 709  * i40e_update_stats - Update the board statistics counters.
 710  * @vsi: the VSI to be updated
 711  *
 712  * There are a few instances where we store the same stat in a
 713  * couple of different structs.  This is partly because we have
 714  * the netdev stats that need to be filled out, which is slightly
 715  * different from the "eth_stats" defined by the chip and used in
 716  * VF communications.  We sort it all out here in a central place.
 717  **/
 718 void i40e_update_stats(struct i40e_vsi *vsi)
 719 {
 720         struct i40e_pf *pf = vsi->back;
 721         struct i40e_hw *hw = &pf->hw;
 722         struct rtnl_link_stats64 *ons;
 723         struct rtnl_link_stats64 *ns;   /* netdev stats */
 724         struct i40e_eth_stats *oes;
 725         struct i40e_eth_stats *es;     /* device's eth stats */
 726         u32 tx_restart, tx_busy;
 727         u32 rx_page, rx_buf;
 728         u64 rx_p, rx_b;
 729         u64 tx_p, tx_b;
 730         int i;
 731         u16 q;
 732
 733         if (test_bit(__I40E_DOWN, &vsi->state) ||
 734             test_bit(__I40E_CONFIG_BUSY, &pf->state))
 735                 return;
 736
 737         ns = i40e_get_vsi_stats_struct(vsi);
 738         ons = &vsi->net_stats_offsets;
 739         es = &vsi->eth_stats;
 740         oes = &vsi->eth_stats_offsets;
 741
 742         /* Gather up the netdev and vsi stats that the driver collects
 743          * on the fly during packet processing
 744          */
 745         rx_b = rx_p = 0;
 746         tx_b = tx_p = 0;
 747         tx_restart = tx_busy = 0;
 748         rx_page = 0;
 749         rx_buf = 0;
 750         rcu_read_lock();
 751         for (q = 0; q < vsi->num_queue_pairs; q++) {
 752                 struct i40e_ring *p;
 753                 u64 bytes, packets;
 754                 unsigned int start;
 755
 756                 /* locate Tx ring */
 757                 p = ACCESS_ONCE(vsi->tx_rings[q]);
 758
 759                 do {
 760                         start = u64_stats_fetch_begin_bh(&p->syncp);
 761                         packets = p->stats.packets;
 762                         bytes = p->stats.bytes;
 763                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 764                 tx_b += bytes;
 765                 tx_p += packets;
 766                 tx_restart += p->tx_stats.restart_queue;
 767                 tx_busy += p->tx_stats.tx_busy;
 768
 769                 /* Rx queue is part of the same block as Tx queue */
 770                 p = &p[1];
 771                 do {
 772                         start = u64_stats_fetch_begin_bh(&p->syncp);
 773                         packets = p->stats.packets;
 774                         bytes = p->stats.bytes;
 775                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 776                 rx_b += bytes;
 777                 rx_p += packets;
 778                 rx_buf += p->rx_stats.alloc_rx_buff_failed;
 779                 rx_page += p->rx_stats.alloc_rx_page_failed;
 780         }
 781         rcu_read_unlock();
 782         vsi->tx_restart = tx_restart;
 783         vsi->tx_busy = tx_busy;
 784         vsi->rx_page_failed = rx_page;
 785         vsi->rx_buf_failed = rx_buf;
 786
 787         ns->rx_packets = rx_p;
 788         ns->rx_bytes = rx_b;
 789         ns->tx_packets = tx_p;
 790         ns->tx_bytes = tx_b;
 791
 792         i40e_update_eth_stats(vsi);
 793         /* update netdev stats from eth stats */
 794         ons->rx_errors = oes->rx_errors;
 795         ns->rx_errors = es->rx_errors;
 796         ons->tx_errors = oes->tx_errors;
 797         ns->tx_errors = es->tx_errors;
 798         ons->multicast = oes->rx_multicast;
 799         ns->multicast = es->rx_multicast;
 800         ons->tx_dropped = oes->tx_discards;
 801         ns->tx_dropped = es->tx_discards;
 802
 803         /* Get the port data only if this is the main PF VSI */
 804         if (vsi == pf->vsi[pf->lan_vsi]) {
 805                 struct i40e_hw_port_stats *nsd = &pf->stats;
 806                 struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 807
 808                 i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
 809                                    I40E_GLPRT_GORCL(hw->port),
 810                                    pf->stat_offsets_loaded,
 811                                    &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
 812                 i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
 813                                    I40E_GLPRT_GOTCL(hw->port),
 814                                    pf->stat_offsets_loaded,
 815                                    &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
 816                 i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
 817                                    pf->stat_offsets_loaded,
 818                                    &osd->eth.rx_discards,
 819                                    &nsd->eth.rx_discards);
 820                 i40e_stat_update32(hw, I40E_GLPRT_TDPC(hw->port),
 821                                    pf->stat_offsets_loaded,
 822                                    &osd->eth.tx_discards,
 823                                    &nsd->eth.tx_discards);
 824                 i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
 825                                    I40E_GLPRT_MPRCL(hw->port),
 826                                    pf->stat_offsets_loaded,
 827                                    &osd->eth.rx_multicast,
 828                                    &nsd->eth.rx_multicast);
 829
 830                 i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
 831                                    pf->stat_offsets_loaded,
 832                                    &osd->tx_dropped_link_down,
 833                                    &nsd->tx_dropped_link_down);
 834
 835                 i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
 836                                    pf->stat_offsets_loaded,
 837                                    &osd->crc_errors, &nsd->crc_errors);
 838                 ns->rx_crc_errors = nsd->crc_errors;
 839
 840                 i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
 841                                    pf->stat_offsets_loaded,
 842                                    &osd->illegal_bytes, &nsd->illegal_bytes);
 843                 ns->rx_errors = nsd->crc_errors
 844                                 + nsd->illegal_bytes;
 845
 846                 i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
 847                                    pf->stat_offsets_loaded,
 848                                    &osd->mac_local_faults,
 849                                    &nsd->mac_local_faults);
 850                 i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
 851                                    pf->stat_offsets_loaded,
 852                                    &osd->mac_remote_faults,
 853                                    &nsd->mac_remote_faults);
 854
 855                 i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
 856                                    pf->stat_offsets_loaded,
 857                                    &osd->rx_length_errors,
 858                                    &nsd->rx_length_errors);
 859                 ns->rx_length_errors = nsd->rx_length_errors;
 860
 861                 i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
 862                                    pf->stat_offsets_loaded,
 863                                    &osd->link_xon_rx, &nsd->link_xon_rx);
 864                 i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
 865                                    pf->stat_offsets_loaded,
 866                                    &osd->link_xon_tx, &nsd->link_xon_tx);
 867                 i40e_update_prio_xoff_rx(pf);  /* handles I40E_GLPRT_LXOFFRXC */
 868                 i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
 869                                    pf->stat_offsets_loaded,
 870                                    &osd->link_xoff_tx, &nsd->link_xoff_tx);
 871
 872                 for (i = 0; i < 8; i++) {
 873                         i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
 874                                            pf->stat_offsets_loaded,
 875                                            &osd->priority_xon_rx[i],
 876                                            &nsd->priority_xon_rx[i]);
 877                         i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
 878                                            pf->stat_offsets_loaded,
 879                                            &osd->priority_xon_tx[i],
 880                                            &nsd->priority_xon_tx[i]);
 881                         i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
 882                                            pf->stat_offsets_loaded,
 883                                            &osd->priority_xoff_tx[i],
 884                                            &nsd->priority_xoff_tx[i]);
 885                         i40e_stat_update32(hw,
 886                                            I40E_GLPRT_RXON2OFFCNT(hw->port, i),
 887                                            pf->stat_offsets_loaded,
 888                                            &osd->priority_xon_2_xoff[i],
 889                                            &nsd->priority_xon_2_xoff[i]);
 890                 }
 891
 892                 i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
 893                                    I40E_GLPRT_PRC64L(hw->port),
 894                                    pf->stat_offsets_loaded,
 895                                    &osd->rx_size_64, &nsd->rx_size_64);
 896                 i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
 897                                    I40E_GLPRT_PRC127L(hw->port),
 898                                    pf->stat_offsets_loaded,
 899                                    &osd->rx_size_127, &nsd->rx_size_127);
 900                 i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
 901                                    I40E_GLPRT_PRC255L(hw->port),
 902                                    pf->stat_offsets_loaded,
 903                                    &osd->rx_size_255, &nsd->rx_size_255);
 904                 i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
 905                                    I40E_GLPRT_PRC511L(hw->port),
 906                                    pf->stat_offsets_loaded,
 907                                    &osd->rx_size_511, &nsd->rx_size_511);
 908                 i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
 909                                    I40E_GLPRT_PRC1023L(hw->port),
 910                                    pf->stat_offsets_loaded,
 911                                    &osd->rx_size_1023, &nsd->rx_size_1023);
 912                 i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
 913                                    I40E_GLPRT_PRC1522L(hw->port),
 914                                    pf->stat_offsets_loaded,
 915                                    &osd->rx_size_1522, &nsd->rx_size_1522);
 916                 i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
 917                                    I40E_GLPRT_PRC9522L(hw->port),
 918                                    pf->stat_offsets_loaded,
 919                                    &osd->rx_size_big, &nsd->rx_size_big);
 920
 921                 i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
 922                                    I40E_GLPRT_PTC64L(hw->port),
 923                                    pf->stat_offsets_loaded,
 924                                    &osd->tx_size_64, &nsd->tx_size_64);
 925                 i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
 926                                    I40E_GLPRT_PTC127L(hw->port),
 927                                    pf->stat_offsets_loaded,
 928                                    &osd->tx_size_127, &nsd->tx_size_127);
 929                 i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
 930                                    I40E_GLPRT_PTC255L(hw->port),
 931                                    pf->stat_offsets_loaded,
 932                                    &osd->tx_size_255, &nsd->tx_size_255);
 933                 i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
 934                                    I40E_GLPRT_PTC511L(hw->port),
 935                                    pf->stat_offsets_loaded,
 936                                    &osd->tx_size_511, &nsd->tx_size_511);
 937                 i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
 938                                    I40E_GLPRT_PTC1023L(hw->port),
 939                                    pf->stat_offsets_loaded,
 940                                    &osd->tx_size_1023, &nsd->tx_size_1023);
 941                 i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
 942                                    I40E_GLPRT_PTC1522L(hw->port),
 943                                    pf->stat_offsets_loaded,
 944                                    &osd->tx_size_1522, &nsd->tx_size_1522);
 945                 i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
 946                                    I40E_GLPRT_PTC9522L(hw->port),
 947                                    pf->stat_offsets_loaded,
 948                                    &osd->tx_size_big, &nsd->tx_size_big);
 949
 950                 i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
 951                                    pf->stat_offsets_loaded,
 952                                    &osd->rx_undersize, &nsd->rx_undersize);
 953                 i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
 954                                    pf->stat_offsets_loaded,
 955                                    &osd->rx_fragments, &nsd->rx_fragments);
 956                 i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
 957                                    pf->stat_offsets_loaded,
 958                                    &osd->rx_oversize, &nsd->rx_oversize);
 959                 i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
 960                                    pf->stat_offsets_loaded,
 961                                    &osd->rx_jabber, &nsd->rx_jabber);
 962         }
 963
 964         pf->stat_offsets_loaded = true;
 965 }
 966
 967 /**
 968  * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
 969  * @vsi: the VSI to be searched
 970  * @macaddr: the MAC address
 971  * @vlan: the vlan
 972  * @is_vf: make sure its a vf filter, else doesn't matter
 973  * @is_netdev: make sure its a netdev filter, else doesn't matter
 974  *
 975  * Returns ptr to the filter object or NULL
 976  **/
 977 static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
 978                                                 u8 *macaddr, s16 vlan,
 979                                                 bool is_vf, bool is_netdev)
 980 {
 981         struct i40e_mac_filter *f;
 982
 983         if (!vsi || !macaddr)
 984                 return NULL;
 985
 986         list_for_each_entry(f, &vsi->mac_filter_list, list) {
 987                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
 988                     (vlan == f->vlan)    &&
 989                     (!is_vf || f->is_vf) &&
 990                     (!is_netdev || f->is_netdev))
 991                         return f;
 992         }
 993         return NULL;
 994 }
 995
 996 /**
 997  * i40e_find_mac - Find a mac addr in the macvlan filters list
 998  * @vsi: the VSI to be searched
 999  * @macaddr: the MAC address we are searching for
1000  * @is_vf: make sure its a vf filter, else doesn't matter
1001  * @is_netdev: make sure its a netdev filter, else doesn't matter
1002  *
1003  * Returns the first filter with the provided MAC address or NULL if
1004  * MAC address was not found
1005  **/
1006 struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, u8 *macaddr,
1007                                       bool is_vf, bool is_netdev)
1008 {
1009         struct i40e_mac_filter *f;
1010
1011         if (!vsi || !macaddr)
1012                 return NULL;
1013
1014         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1015                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1016                     (!is_vf || f->is_vf) &&
1017                     (!is_netdev || f->is_netdev))
1018                         return f;
1019         }
1020         return NULL;
1021 }
1022
1023 /**
1024  * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
1025  * @vsi: the VSI to be searched
1026  *
1027  * Returns true if VSI is in vlan mode or false otherwise
1028  **/
1029 bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
1030 {
1031         struct i40e_mac_filter *f;
1032
1033         /* Only -1 for all the filters denotes not in vlan mode
1034          * so we have to go through all the list in order to make sure
1035          */
1036         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1037                 if (f->vlan >= 0)
1038                         return true;
1039         }
1040
1041         return false;
1042 }
1043
1044 /**
1045  * i40e_put_mac_in_vlan - Make macvlan filters from macaddrs and vlans
1046  * @vsi: the VSI to be searched
1047  * @macaddr: the mac address to be filtered
1048  * @is_vf: true if it is a vf
1049  * @is_netdev: true if it is a netdev
1050  *
1051  * Goes through all the macvlan filters and adds a
1052  * macvlan filter for each unique vlan that already exists
1053  *
1054  * Returns first filter found on success, else NULL
1055  **/
1056 struct i40e_mac_filter *i40e_put_mac_in_vlan(struct i40e_vsi *vsi, u8 *macaddr,
1057                                              bool is_vf, bool is_netdev)
1058 {
1059         struct i40e_mac_filter *f;
1060
1061         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1062                 if (!i40e_find_filter(vsi, macaddr, f->vlan,
1063                                       is_vf, is_netdev)) {
1064                         if (!i40e_add_filter(vsi, macaddr, f->vlan,
1065                                                 is_vf, is_netdev))
1066                                 return NULL;
1067                 }
1068         }
1069
1070         return list_first_entry_or_null(&vsi->mac_filter_list,
1071                                         struct i40e_mac_filter, list);
1072 }
1073
1074 /**
1075  * i40e_add_filter - Add a mac/vlan filter to the VSI
1076  * @vsi: the VSI to be searched
1077  * @macaddr: the MAC address
1078  * @vlan: the vlan
1079  * @is_vf: make sure its a vf filter, else doesn't matter
1080  * @is_netdev: make sure its a netdev filter, else doesn't matter
1081  *
1082  * Returns ptr to the filter object or NULL when no memory available.
1083  **/
1084 struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
1085                                         u8 *macaddr, s16 vlan,
1086                                         bool is_vf, bool is_netdev)
1087 {
1088         struct i40e_mac_filter *f;
1089
1090         if (!vsi || !macaddr)
1091                 return NULL;
1092
1093         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1094         if (!f) {
1095                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
1096                 if (!f)
1097                         goto add_filter_out;
1098
1099                 memcpy(f->macaddr, macaddr, ETH_ALEN);
1100                 f->vlan = vlan;
1101                 f->changed = true;
1102
1103                 INIT_LIST_HEAD(&f->list);
1104                 list_add(&f->list, &vsi->mac_filter_list);
1105         }
1106
1107         /* increment counter and add a new flag if needed */
1108         if (is_vf) {
1109                 if (!f->is_vf) {
1110                         f->is_vf = true;
1111                         f->counter++;
1112                 }
1113         } else if (is_netdev) {
1114                 if (!f->is_netdev) {
1115                         f->is_netdev = true;
1116                         f->counter++;
1117                 }
1118         } else {
1119                 f->counter++;
1120         }
1121
1122         /* changed tells sync_filters_subtask to
1123          * push the filter down to the firmware
1124          */
1125         if (f->changed) {
1126                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1127                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1128         }
1129
1130 add_filter_out:
1131         return f;
1132 }
1133
1134 /**
1135  * i40e_del_filter - Remove a mac/vlan filter from the VSI
1136  * @vsi: the VSI to be searched
1137  * @macaddr: the MAC address
1138  * @vlan: the vlan
1139  * @is_vf: make sure it's a vf filter, else doesn't matter
1140  * @is_netdev: make sure it's a netdev filter, else doesn't matter
1141  **/
1142 void i40e_del_filter(struct i40e_vsi *vsi,
1143                      u8 *macaddr, s16 vlan,
1144                      bool is_vf, bool is_netdev)
1145 {
1146         struct i40e_mac_filter *f;
1147
1148         if (!vsi || !macaddr)
1149                 return;
1150
1151         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1152         if (!f || f->counter == 0)
1153                 return;
1154
1155         if (is_vf) {
1156                 if (f->is_vf) {
1157                         f->is_vf = false;
1158                         f->counter--;
1159                 }
1160         } else if (is_netdev) {
1161                 if (f->is_netdev) {
1162                         f->is_netdev = false;
1163                         f->counter--;
1164                 }
1165         } else {
1166                 /* make sure we don't remove a filter in use by vf or netdev */
1167                 int min_f = 0;
1168                 min_f += (f->is_vf ? 1 : 0);
1169                 min_f += (f->is_netdev ? 1 : 0);
1170
1171                 if (f->counter > min_f)
1172                         f->counter--;
1173         }
1174
1175         /* counter == 0 tells sync_filters_subtask to
1176          * remove the filter from the firmware's list
1177          */
1178         if (f->counter == 0) {
1179                 f->changed = true;
1180                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1181                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1182         }
1183 }
1184
1185 /**
1186  * i40e_set_mac - NDO callback to set mac address
1187  * @netdev: network interface device structure
1188  * @p: pointer to an address structure
1189  *
1190  * Returns 0 on success, negative on failure
1191  **/
1192 static int i40e_set_mac(struct net_device *netdev, void *p)
1193 {
1194         struct i40e_netdev_priv *np = netdev_priv(netdev);
1195         struct i40e_vsi *vsi = np->vsi;
1196         struct sockaddr *addr = p;
1197         struct i40e_mac_filter *f;
1198
1199         if (!is_valid_ether_addr(addr->sa_data))
1200                 return -EADDRNOTAVAIL;
1201
1202         netdev_info(netdev, "set mac address=%pM\n", addr->sa_data);
1203
1204         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
1205                 return 0;
1206
1207         if (vsi->type == I40E_VSI_MAIN) {
1208                 i40e_status ret;
1209                 ret = i40e_aq_mac_address_write(&vsi->back->hw,
1210                                                 I40E_AQC_WRITE_TYPE_LAA_ONLY,
1211                                                 addr->sa_data, NULL);
1212                 if (ret) {
1213                         netdev_info(netdev,
1214                                     "Addr change for Main VSI failed: %d\n",
1215                                     ret);
1216                         return -EADDRNOTAVAIL;
1217                 }
1218
1219                 memcpy(vsi->back->hw.mac.addr, addr->sa_data, netdev->addr_len);
1220         }
1221
1222         /* In order to be sure to not drop any packets, add the new address
1223          * then delete the old one.
1224          */
1225         f = i40e_add_filter(vsi, addr->sa_data, I40E_VLAN_ANY, false, false);
1226         if (!f)
1227                 return -ENOMEM;
1228
1229         i40e_sync_vsi_filters(vsi);
1230         i40e_del_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY, false, false);
1231         i40e_sync_vsi_filters(vsi);
1232
1233         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1234
1235         return 0;
1236 }
1237
1238 /**
1239  * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
1240  * @vsi: the VSI being setup
1241  * @ctxt: VSI context structure
1242  * @enabled_tc: Enabled TCs bitmap
1243  * @is_add: True if called before Add VSI
1244  *
1245  * Setup VSI queue mapping for enabled traffic classes.
1246  **/
1247 static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1248                                      struct i40e_vsi_context *ctxt,
1249                                      u8 enabled_tc,
1250                                      bool is_add)
1251 {
1252         struct i40e_pf *pf = vsi->back;
1253         u16 sections = 0;
1254         u8 netdev_tc = 0;
1255         u16 numtc = 0;
1256         u16 qcount;
1257         u8 offset;
1258         u16 qmap;
1259         int i;
1260
1261         sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
1262         offset = 0;
1263
1264         if (enabled_tc && (vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
1265                 /* Find numtc from enabled TC bitmap */
1266                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1267                         if (enabled_tc & (1 << i)) /* TC is enabled */
1268                                 numtc++;
1269                 }
1270                 if (!numtc) {
1271                         dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
1272                         numtc = 1;
1273                 }
1274         } else {
1275                 /* At least TC0 is enabled in case of non-DCB case */
1276                 numtc = 1;
1277         }
1278
1279         vsi->tc_config.numtc = numtc;
1280         vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
1281
1282         /* Setup queue offset/count for all TCs for given VSI */
1283         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1284                 /* See if the given TC is enabled for the given VSI */
1285                 if (vsi->tc_config.enabled_tc & (1 << i)) { /* TC is enabled */
1286                         int pow, num_qps;
1287
1288                         vsi->tc_config.tc_info[i].qoffset = offset;
1289                         switch (vsi->type) {
1290                         case I40E_VSI_MAIN:
1291                                 if (i == 0)
1292                                         qcount = pf->rss_size;
1293                                 else
1294                                         qcount = pf->num_tc_qps;
1295                                 vsi->tc_config.tc_info[i].qcount = qcount;
1296                                 break;
1297                         case I40E_VSI_FDIR:
1298                         case I40E_VSI_SRIOV:
1299                         case I40E_VSI_VMDQ2:
1300                         default:
1301                                 qcount = vsi->alloc_queue_pairs;
1302                                 vsi->tc_config.tc_info[i].qcount = qcount;
1303                                 WARN_ON(i != 0);
1304                                 break;
1305                         }
1306
1307                         /* find the power-of-2 of the number of queue pairs */
1308                         num_qps = vsi->tc_config.tc_info[i].qcount;
1309                         pow = 0;
1310                         while (num_qps &&
1311                               ((1 << pow) < vsi->tc_config.tc_info[i].qcount)) {
1312                                 pow++;
1313                                 num_qps >>= 1;
1314                         }
1315
1316                         vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
1317                         qmap =
1318                             (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
1319                             (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);
1320
1321                         offset += vsi->tc_config.tc_info[i].qcount;
1322                 } else {
1323                         /* TC is not enabled so set the offset to
1324                          * default queue and allocate one queue
1325                          * for the given TC.
1326                          */
1327                         vsi->tc_config.tc_info[i].qoffset = 0;
1328                         vsi->tc_config.tc_info[i].qcount = 1;
1329                         vsi->tc_config.tc_info[i].netdev_tc = 0;
1330
1331                         qmap = 0;
1332                 }
1333                 ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
1334         }
1335
1336         /* Set actual Tx/Rx queue pairs */
1337         vsi->num_queue_pairs = offset;
1338
1339         /* Scheduler section valid can only be set for ADD VSI */
1340         if (is_add) {
1341                 sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
1342
1343                 ctxt->info.up_enable_bits = enabled_tc;
1344         }
1345         if (vsi->type == I40E_VSI_SRIOV) {
1346                 ctxt->info.mapping_flags |=
1347                                      cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
1348                 for (i = 0; i < vsi->num_queue_pairs; i++)
1349                         ctxt->info.queue_mapping[i] =
1350                                                cpu_to_le16(vsi->base_queue + i);
1351         } else {
1352                 ctxt->info.mapping_flags |=
1353                                         cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
1354                 ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
1355         }
1356         ctxt->info.valid_sections |= cpu_to_le16(sections);
1357 }
1358
1359 /**
1360  * i40e_set_rx_mode - NDO callback to set the netdev filters
1361  * @netdev: network interface device structure
1362  **/
1363 static void i40e_set_rx_mode(struct net_device *netdev)
1364 {
1365         struct i40e_netdev_priv *np = netdev_priv(netdev);
1366         struct i40e_mac_filter *f, *ftmp;
1367         struct i40e_vsi *vsi = np->vsi;
1368         struct netdev_hw_addr *uca;
1369         struct netdev_hw_addr *mca;
1370         struct netdev_hw_addr *ha;
1371
1372         /* add addr if not already in the filter list */
1373         netdev_for_each_uc_addr(uca, netdev) {
1374                 if (!i40e_find_mac(vsi, uca->addr, false, true)) {
1375                         if (i40e_is_vsi_in_vlan(vsi))
1376                                 i40e_put_mac_in_vlan(vsi, uca->addr,
1377                                                      false, true);
1378                         else
1379                                 i40e_add_filter(vsi, uca->addr, I40E_VLAN_ANY,
1380                                                 false, true);
1381                 }
1382         }
1383
1384         netdev_for_each_mc_addr(mca, netdev) {
1385                 if (!i40e_find_mac(vsi, mca->addr, false, true)) {
1386                         if (i40e_is_vsi_in_vlan(vsi))
1387                                 i40e_put_mac_in_vlan(vsi, mca->addr,
1388                                                      false, true);
1389                         else
1390                                 i40e_add_filter(vsi, mca->addr, I40E_VLAN_ANY,
1391                                                 false, true);
1392                 }
1393         }
1394
1395         /* remove filter if not in netdev list */
1396         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1397                 bool found = false;
1398
1399                 if (!f->is_netdev)
1400                         continue;
1401
1402                 if (is_multicast_ether_addr(f->macaddr)) {
1403                         netdev_for_each_mc_addr(mca, netdev) {
1404                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
1405                                         found = true;
1406                                         break;
1407                                 }
1408                         }
1409                 } else {
1410                         netdev_for_each_uc_addr(uca, netdev) {
1411                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
1412                                         found = true;
1413                                         break;
1414                                 }
1415                         }
1416
1417                         for_each_dev_addr(netdev, ha) {
1418                                 if (ether_addr_equal(ha->addr, f->macaddr)) {
1419                                         found = true;
1420                                         break;
1421                                 }
1422                         }
1423                 }
1424                 if (!found)
1425                         i40e_del_filter(
1426                            vsi, f->macaddr, I40E_VLAN_ANY, false, true);
1427         }
1428
1429         /* check for other flag changes */
1430         if (vsi->current_netdev_flags != vsi->netdev->flags) {
1431                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1432                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1433         }
1434 }
1435
1436 /**
1437  * i40e_sync_vsi_filters - Update the VSI filter list to the HW
1438  * @vsi: ptr to the VSI
1439  *
1440  * Push any outstanding VSI filter changes through the AdminQ.
1441  *
1442  * Returns 0 or error value
1443  **/
1444 int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
1445 {
1446         struct i40e_mac_filter *f, *ftmp;
1447         bool promisc_forced_on = false;
1448         bool add_happened = false;
1449         int filter_list_len = 0;
1450         u32 changed_flags = 0;
1451         i40e_status aq_ret = 0;
1452         struct i40e_pf *pf;
1453         int num_add = 0;
1454         int num_del = 0;
1455         u16 cmd_flags;
1456
1457         /* empty array typed pointers, kcalloc later */
1458         struct i40e_aqc_add_macvlan_element_data *add_list;
1459         struct i40e_aqc_remove_macvlan_element_data *del_list;
1460
1461         while (test_and_set_bit(__I40E_CONFIG_BUSY, &vsi->state))
1462                 usleep_range(1000, 2000);
1463         pf = vsi->back;
1464
1465         if (vsi->netdev) {
1466                 changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
1467                 vsi->current_netdev_flags = vsi->netdev->flags;
1468         }
1469
1470         if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
1471                 vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;
1472
1473                 filter_list_len = pf->hw.aq.asq_buf_size /
1474                             sizeof(struct i40e_aqc_remove_macvlan_element_data);
1475                 del_list = kcalloc(filter_list_len,
1476                             sizeof(struct i40e_aqc_remove_macvlan_element_data),
1477                             GFP_KERNEL);
1478                 if (!del_list)
1479                         return -ENOMEM;
1480
1481                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1482                         if (!f->changed)
1483                                 continue;
1484
1485                         if (f->counter != 0)
1486                                 continue;
1487                         f->changed = false;
1488                         cmd_flags = 0;
1489
1490                         /* add to delete list */
1491                         memcpy(del_list[num_del].mac_addr,
1492                                f->macaddr, ETH_ALEN);
1493                         del_list[num_del].vlan_tag =
1494                                 cpu_to_le16((u16)(f->vlan ==
1495                                             I40E_VLAN_ANY ? 0 : f->vlan));
1496
1497                         /* vlan0 as wild card to allow packets from all vlans */
1498                         if (f->vlan == I40E_VLAN_ANY ||
1499                             (vsi->netdev && !(vsi->netdev->features &
1500                                               NETIF_F_HW_VLAN_CTAG_FILTER)))
1501                                 cmd_flags |= I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
1502                         cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
1503                         del_list[num_del].flags = cmd_flags;
1504                         num_del++;
1505
1506                         /* unlink from filter list */
1507                         list_del(&f->list);
1508                         kfree(f);
1509
1510                         /* flush a full buffer */
1511                         if (num_del == filter_list_len) {
1512                                 aq_ret = i40e_aq_remove_macvlan(&pf->hw,
1513                                             vsi->seid, del_list, num_del,
1514                                             NULL);
1515                                 num_del = 0;
1516                                 memset(del_list, 0, sizeof(*del_list));
1517
1518                                 if (aq_ret)
1519                                         dev_info(&pf->pdev->dev,
1520                                                  "ignoring delete macvlan error, err %d, aq_err %d while flushing a full buffer\n",
1521                                                  aq_ret,
1522                                                  pf->hw.aq.asq_last_status);
1523                         }
1524                 }
1525                 if (num_del) {
1526                         aq_ret = i40e_aq_remove_macvlan(&pf->hw, vsi->seid,
1527                                                      del_list, num_del, NULL);
1528                         num_del = 0;
1529
1530                         if (aq_ret)
1531                                 dev_info(&pf->pdev->dev,
1532                                          "ignoring delete macvlan error, err %d, aq_err %d\n",
1533                                          aq_ret, pf->hw.aq.asq_last_status);
1534                 }
1535
1536                 kfree(del_list);
1537                 del_list = NULL;
1538
1539                 /* do all the adds now */
1540                 filter_list_len = pf->hw.aq.asq_buf_size /
1541                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1542                 add_list = kcalloc(filter_list_len,
1543                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1544                                GFP_KERNEL);
1545                 if (!add_list)
1546                         return -ENOMEM;
1547
1548                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1549                         if (!f->changed)
1550                                 continue;
1551
1552                         if (f->counter == 0)
1553                                 continue;
1554                         f->changed = false;
1555                         add_happened = true;
1556                         cmd_flags = 0;
1557
1558                         /* add to add array */
1559                         memcpy(add_list[num_add].mac_addr,
1560                                f->macaddr, ETH_ALEN);
1561                         add_list[num_add].vlan_tag =
1562                                 cpu_to_le16(
1563                                  (u16)(f->vlan == I40E_VLAN_ANY ? 0 : f->vlan));
1564                         add_list[num_add].queue_number = 0;
1565
1566                         cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
1567
1568                         /* vlan0 as wild card to allow packets from all vlans */
1569                         if (f->vlan == I40E_VLAN_ANY || (vsi->netdev &&
1570                             !(vsi->netdev->features &
1571                                                  NETIF_F_HW_VLAN_CTAG_FILTER)))
1572                                 cmd_flags |= I40E_AQC_MACVLAN_ADD_IGNORE_VLAN;
1573                         add_list[num_add].flags = cpu_to_le16(cmd_flags);
1574                         num_add++;
1575
1576                         /* flush a full buffer */
1577                         if (num_add == filter_list_len) {
1578                                 aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1579                                                              add_list, num_add,
1580                                                              NULL);
1581                                 num_add = 0;
1582
1583                                 if (aq_ret)
1584                                         break;
1585                                 memset(add_list, 0, sizeof(*add_list));
1586                         }
1587                 }
1588                 if (num_add) {
1589                         aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1590                                                      add_list, num_add, NULL);
1591                         num_add = 0;
1592                 }
1593                 kfree(add_list);
1594                 add_list = NULL;
1595
1596                 if (add_happened && (!aq_ret)) {
1597                         /* do nothing */;
1598                 } else if (add_happened && (aq_ret)) {
1599                         dev_info(&pf->pdev->dev,
1600                                  "add filter failed, err %d, aq_err %d\n",
1601                                  aq_ret, pf->hw.aq.asq_last_status);
1602                         if ((pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOSPC) &&
1603                             !test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1604                                       &vsi->state)) {
1605                                 promisc_forced_on = true;
1606                                 set_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1607                                         &vsi->state);
1608                                 dev_info(&pf->pdev->dev, "promiscuous mode forced on\n");
1609                         }
1610                 }
1611         }
1612
1613         /* check for changes in promiscuous modes */
1614         if (changed_flags & IFF_ALLMULTI) {
1615                 bool cur_multipromisc;
1616                 cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
1617                 aq_ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
1618                                                                vsi->seid,
1619                                                                cur_multipromisc,
1620                                                                NULL);
1621                 if (aq_ret)
1622                         dev_info(&pf->pdev->dev,
1623                                  "set multi promisc failed, err %d, aq_err %d\n",
1624                                  aq_ret, pf->hw.aq.asq_last_status);
1625         }
1626         if ((changed_flags & IFF_PROMISC) || promisc_forced_on) {
1627                 bool cur_promisc;
1628                 cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
1629                                test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1630                                         &vsi->state));
1631                 aq_ret = i40e_aq_set_vsi_unicast_promiscuous(&vsi->back->hw,
1632                                                              vsi->seid,
1633                                                              cur_promisc, NULL);
1634                 if (aq_ret)
1635                         dev_info(&pf->pdev->dev,
1636                                  "set uni promisc failed, err %d, aq_err %d\n",
1637                                  aq_ret, pf->hw.aq.asq_last_status);
1638         }
1639
1640         clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
1641         return 0;
1642 }
1643
1644 /**
1645  * i40e_sync_filters_subtask - Sync the VSI filter list with HW
1646  * @pf: board private structure
1647  **/
1648 static void i40e_sync_filters_subtask(struct i40e_pf *pf)
1649 {
1650         int v;
1651
1652         if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
1653                 return;
1654         pf->flags &= ~I40E_FLAG_FILTER_SYNC;
1655
1656         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
1657                 if (pf->vsi[v] &&
1658                     (pf->vsi[v]->flags & I40E_VSI_FLAG_FILTER_CHANGED))
1659                         i40e_sync_vsi_filters(pf->vsi[v]);
1660         }
1661 }
1662
1663 /**
1664  * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
1665  * @netdev: network interface device structure
1666  * @new_mtu: new value for maximum frame size
1667  *
1668  * Returns 0 on success, negative on failure
1669  **/
1670 static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
1671 {
1672         struct i40e_netdev_priv *np = netdev_priv(netdev);
1673         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1674         struct i40e_vsi *vsi = np->vsi;
1675
1676         /* MTU < 68 is an error and causes problems on some kernels */
1677         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1678                 return -EINVAL;
1679
1680         netdev_info(netdev, "changing MTU from %d to %d\n",
1681                     netdev->mtu, new_mtu);
1682         netdev->mtu = new_mtu;
1683         if (netif_running(netdev))
1684                 i40e_vsi_reinit_locked(vsi);
1685
1686         return 0;
1687 }
1688
1689 /**
1690  * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
1691  * @vsi: the vsi being adjusted
1692  **/
1693 void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
1694 {
1695         struct i40e_vsi_context ctxt;
1696         i40e_status ret;
1697
1698         if ((vsi->info.valid_sections &
1699              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1700             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
1701                 return;  /* already enabled */
1702
1703         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1704         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1705                                     I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;
1706
1707         ctxt.seid = vsi->seid;
1708         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1709         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1710         if (ret) {
1711                 dev_info(&vsi->back->pdev->dev,
1712                          "%s: update vsi failed, aq_err=%d\n",
1713                          __func__, vsi->back->hw.aq.asq_last_status);
1714         }
1715 }
1716
1717 /**
1718  * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
1719  * @vsi: the vsi being adjusted
1720  **/
1721 void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
1722 {
1723         struct i40e_vsi_context ctxt;
1724         i40e_status ret;
1725
1726         if ((vsi->info.valid_sections &
1727              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1728             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
1729              I40E_AQ_VSI_PVLAN_EMOD_MASK))
1730                 return;  /* already disabled */
1731
1732         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1733         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1734                                     I40E_AQ_VSI_PVLAN_EMOD_NOTHING;
1735
1736         ctxt.seid = vsi->seid;
1737         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1738         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1739         if (ret) {
1740                 dev_info(&vsi->back->pdev->dev,
1741                          "%s: update vsi failed, aq_err=%d\n",
1742                          __func__, vsi->back->hw.aq.asq_last_status);
1743         }
1744 }
1745
1746 /**
1747  * i40e_vlan_rx_register - Setup or shutdown vlan offload
1748  * @netdev: network interface to be adjusted
1749  * @features: netdev features to test if VLAN offload is enabled or not
1750  **/
1751 static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
1752 {
1753         struct i40e_netdev_priv *np = netdev_priv(netdev);
1754         struct i40e_vsi *vsi = np->vsi;
1755
1756         if (features & NETIF_F_HW_VLAN_CTAG_RX)
1757                 i40e_vlan_stripping_enable(vsi);
1758         else
1759                 i40e_vlan_stripping_disable(vsi);
1760 }
1761
1762 /**
1763  * i40e_vsi_add_vlan - Add vsi membership for given vlan
1764  * @vsi: the vsi being configured
1765  * @vid: vlan id to be added (0 = untagged only , -1 = any)
1766  **/
1767 int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
1768 {
1769         struct i40e_mac_filter *f, *add_f;
1770         bool is_netdev, is_vf;
1771         int ret;
1772
1773         is_vf = (vsi->type == I40E_VSI_SRIOV);
1774         is_netdev = !!(vsi->netdev);
1775
1776         if (is_netdev) {
1777                 add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, vid,
1778                                         is_vf, is_netdev);
1779                 if (!add_f) {
1780                         dev_info(&vsi->back->pdev->dev,
1781                                  "Could not add vlan filter %d for %pM\n",
1782                                  vid, vsi->netdev->dev_addr);
1783                         return -ENOMEM;
1784                 }
1785         }
1786
1787         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1788                 add_f = i40e_add_filter(vsi, f->macaddr, vid, 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, f->macaddr);
1793                         return -ENOMEM;
1794                 }
1795         }
1796
1797         ret = i40e_sync_vsi_filters(vsi);
1798         if (ret) {
1799                 dev_info(&vsi->back->pdev->dev,
1800                          "Could not sync filters for vid %d\n", vid);
1801                 return ret;
1802         }
1803
1804         /* Now if we add a vlan tag, make sure to check if it is the first
1805          * tag (i.e. a "tag" -1 does exist) and if so replace the -1 "tag"
1806          * with 0, so we now accept untagged and specified tagged traffic
1807          * (and not any taged and untagged)
1808          */
1809         if (vid > 0) {
1810                 if (is_netdev && i40e_find_filter(vsi, vsi->netdev->dev_addr,
1811                                                   I40E_VLAN_ANY,
1812                                                   is_vf, is_netdev)) {
1813                         i40e_del_filter(vsi, vsi->netdev->dev_addr,
1814                                         I40E_VLAN_ANY, is_vf, is_netdev);
1815                         add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, 0,
1816                                                 is_vf, is_netdev);
1817                         if (!add_f) {
1818                                 dev_info(&vsi->back->pdev->dev,
1819                                          "Could not add filter 0 for %pM\n",
1820                                          vsi->netdev->dev_addr);
1821                                 return -ENOMEM;
1822                         }
1823                 }
1824
1825                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1826                         if (i40e_find_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1827                                              is_vf, is_netdev)) {
1828                                 i40e_del_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1829                                                 is_vf, is_netdev);
1830                                 add_f = i40e_add_filter(vsi, f->macaddr,
1831                                                         0, is_vf, is_netdev);
1832                                 if (!add_f) {
1833                                         dev_info(&vsi->back->pdev->dev,
1834                                                  "Could not add filter 0 for %pM\n",
1835                                                  f->macaddr);
1836                                         return -ENOMEM;
1837                                 }
1838                         }
1839                 }
1840                 ret = i40e_sync_vsi_filters(vsi);
1841         }
1842
1843         return ret;
1844 }
1845
1846 /**
1847  * i40e_vsi_kill_vlan - Remove vsi membership for given vlan
1848  * @vsi: the vsi being configured
1849  * @vid: vlan id to be removed (0 = untagged only , -1 = any)
1850  *
1851  * Return: 0 on success or negative otherwise
1852  **/
1853 int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
1854 {
1855         struct net_device *netdev = vsi->netdev;
1856         struct i40e_mac_filter *f, *add_f;
1857         bool is_vf, is_netdev;
1858         int filter_count = 0;
1859         int ret;
1860
1861         is_vf = (vsi->type == I40E_VSI_SRIOV);
1862         is_netdev = !!(netdev);
1863
1864         if (is_netdev)
1865                 i40e_del_filter(vsi, netdev->dev_addr, vid, is_vf, is_netdev);
1866
1867         list_for_each_entry(f, &vsi->mac_filter_list, list)
1868                 i40e_del_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1869
1870         ret = i40e_sync_vsi_filters(vsi);
1871         if (ret) {
1872                 dev_info(&vsi->back->pdev->dev, "Could not sync filters\n");
1873                 return ret;
1874         }
1875
1876         /* go through all the filters for this VSI and if there is only
1877          * vid == 0 it means there are no other filters, so vid 0 must
1878          * be replaced with -1. This signifies that we should from now
1879          * on accept any traffic (with any tag present, or untagged)
1880          */
1881         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1882                 if (is_netdev) {
1883                         if (f->vlan &&
1884                             ether_addr_equal(netdev->dev_addr, f->macaddr))
1885                                 filter_count++;
1886                 }
1887
1888                 if (f->vlan)
1889                         filter_count++;
1890         }
1891
1892         if (!filter_count && is_netdev) {
1893                 i40e_del_filter(vsi, netdev->dev_addr, 0, is_vf, is_netdev);
1894                 f = i40e_add_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY,
1895                                     is_vf, is_netdev);
1896                 if (!f) {
1897                         dev_info(&vsi->back->pdev->dev,
1898                                  "Could not add filter %d for %pM\n",
1899                                  I40E_VLAN_ANY, netdev->dev_addr);
1900                         return -ENOMEM;
1901                 }
1902         }
1903
1904         if (!filter_count) {
1905                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1906                         i40e_del_filter(vsi, f->macaddr, 0, is_vf, is_netdev);
1907                         add_f = i40e_add_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1908                                             is_vf, is_netdev);
1909                         if (!add_f) {
1910                                 dev_info(&vsi->back->pdev->dev,
1911                                          "Could not add filter %d for %pM\n",
1912                                          I40E_VLAN_ANY, f->macaddr);
1913                                 return -ENOMEM;
1914                         }
1915                 }
1916         }
1917
1918         return i40e_sync_vsi_filters(vsi);
1919 }
1920
1921 /**
1922  * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
1923  * @netdev: network interface to be adjusted
1924  * @vid: vlan id to be added
1925  *
1926  * net_device_ops implementation for adding vlan ids
1927  **/
1928 static int i40e_vlan_rx_add_vid(struct net_device *netdev,
1929                                 __always_unused __be16 proto, u16 vid)
1930 {
1931         struct i40e_netdev_priv *np = netdev_priv(netdev);
1932         struct i40e_vsi *vsi = np->vsi;
1933         int ret = 0;
1934
1935         if (vid > 4095)
1936                 return -EINVAL;
1937
1938         netdev_info(netdev, "adding %pM vid=%d\n", netdev->dev_addr, vid);
1939
1940         /* If the network stack called us with vid = 0, we should
1941          * indicate to i40e_vsi_add_vlan() that we want to receive
1942          * any traffic (i.e. with any vlan tag, or untagged)
1943          */
1944         ret = i40e_vsi_add_vlan(vsi, vid ? vid : I40E_VLAN_ANY);
1945
1946         if (!ret && (vid < VLAN_N_VID))
1947                 set_bit(vid, vsi->active_vlans);
1948
1949         return ret;
1950 }
1951
1952 /**
1953  * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
1954  * @netdev: network interface to be adjusted
1955  * @vid: vlan id to be removed
1956  *
1957  * net_device_ops implementation for adding vlan ids
1958  **/
1959 static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
1960                                  __always_unused __be16 proto, u16 vid)
1961 {
1962         struct i40e_netdev_priv *np = netdev_priv(netdev);
1963         struct i40e_vsi *vsi = np->vsi;
1964
1965         netdev_info(netdev, "removing %pM vid=%d\n", netdev->dev_addr, vid);
1966
1967         /* return code is ignored as there is nothing a user
1968          * can do about failure to remove and a log message was
1969          * already printed from the other function
1970          */
1971         i40e_vsi_kill_vlan(vsi, vid);
1972
1973         clear_bit(vid, vsi->active_vlans);
1974
1975         return 0;
1976 }
1977
1978 /**
1979  * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
1980  * @vsi: the vsi being brought back up
1981  **/
1982 static void i40e_restore_vlan(struct i40e_vsi *vsi)
1983 {
1984         u16 vid;
1985
1986         if (!vsi->netdev)
1987                 return;
1988
1989         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
1990
1991         for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
1992                 i40e_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q),
1993                                      vid);
1994 }
1995
1996 /**
1997  * i40e_vsi_add_pvid - Add pvid for the VSI
1998  * @vsi: the vsi being adjusted
1999  * @vid: the vlan id to set as a PVID
2000  **/
2001 int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
2002 {
2003         struct i40e_vsi_context ctxt;
2004         i40e_status aq_ret;
2005
2006         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2007         vsi->info.pvid = cpu_to_le16(vid);
2008         vsi->info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_INSERT_PVID;
2009         vsi->info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_UNTAGGED;
2010
2011         ctxt.seid = vsi->seid;
2012         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
2013         aq_ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2014         if (aq_ret) {
2015                 dev_info(&vsi->back->pdev->dev,
2016                          "%s: update vsi failed, aq_err=%d\n",
2017                          __func__, vsi->back->hw.aq.asq_last_status);
2018                 return -ENOENT;
2019         }
2020
2021         return 0;
2022 }
2023
2024 /**
2025  * i40e_vsi_remove_pvid - Remove the pvid from the VSI
2026  * @vsi: the vsi being adjusted
2027  *
2028  * Just use the vlan_rx_register() service to put it back to normal
2029  **/
2030 void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
2031 {
2032         vsi->info.pvid = 0;
2033         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
2034 }
2035
2036 /**
2037  * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
2038  * @vsi: ptr to the VSI
2039  *
2040  * If this function returns with an error, then it's possible one or
2041  * more of the rings is populated (while the rest are not).  It is the
2042  * callers duty to clean those orphaned rings.
2043  *
2044  * Return 0 on success, negative on failure
2045  **/
2046 static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
2047 {
2048         int i, err = 0;
2049
2050         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2051                 err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);
2052
2053         return err;
2054 }
2055
2056 /**
2057  * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
2058  * @vsi: ptr to the VSI
2059  *
2060  * Free VSI's transmit software resources
2061  **/
2062 static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
2063 {
2064         int i;
2065
2066         for (i = 0; i < vsi->num_queue_pairs; i++)
2067                 if (vsi->tx_rings[i]->desc)
2068                         i40e_free_tx_resources(vsi->tx_rings[i]);
2069 }
2070
2071 /**
2072  * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
2073  * @vsi: ptr to the VSI
2074  *
2075  * If this function returns with an error, then it's possible one or
2076  * more of the rings is populated (while the rest are not).  It is the
2077  * callers duty to clean those orphaned rings.
2078  *
2079  * Return 0 on success, negative on failure
2080  **/
2081 static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
2082 {
2083         int i, err = 0;
2084
2085         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2086                 err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
2087         return err;
2088 }
2089
2090 /**
2091  * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
2092  * @vsi: ptr to the VSI
2093  *
2094  * Free all receive software resources
2095  **/
2096 static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
2097 {
2098         int i;
2099
2100         for (i = 0; i < vsi->num_queue_pairs; i++)
2101                 if (vsi->rx_rings[i]->desc)
2102                         i40e_free_rx_resources(vsi->rx_rings[i]);
2103 }
2104
2105 /**
2106  * i40e_configure_tx_ring - Configure a transmit ring context and rest
2107  * @ring: The Tx ring to configure
2108  *
2109  * Configure the Tx descriptor ring in the HMC context.
2110  **/
2111 static int i40e_configure_tx_ring(struct i40e_ring *ring)
2112 {
2113         struct i40e_vsi *vsi = ring->vsi;
2114         u16 pf_q = vsi->base_queue + ring->queue_index;
2115         struct i40e_hw *hw = &vsi->back->hw;
2116         struct i40e_hmc_obj_txq tx_ctx;
2117         i40e_status err = 0;
2118         u32 qtx_ctl = 0;
2119
2120         /* some ATR related tx ring init */
2121         if (vsi->back->flags & I40E_FLAG_FDIR_ATR_ENABLED) {
2122                 ring->atr_sample_rate = vsi->back->atr_sample_rate;
2123                 ring->atr_count = 0;
2124         } else {
2125                 ring->atr_sample_rate = 0;
2126         }
2127
2128         /* initialize XPS */
2129         if (ring->q_vector && ring->netdev &&
2130             !test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
2131                 netif_set_xps_queue(ring->netdev,
2132                                     &ring->q_vector->affinity_mask,
2133                                     ring->queue_index);
2134
2135         /* clear the context structure first */
2136         memset(&tx_ctx, 0, sizeof(tx_ctx));
2137
2138         tx_ctx.new_context = 1;
2139         tx_ctx.base = (ring->dma / 128);
2140         tx_ctx.qlen = ring->count;
2141         tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FDIR_ENABLED |
2142                         I40E_FLAG_FDIR_ATR_ENABLED));
2143
2144         /* As part of VSI creation/update, FW allocates certain
2145          * Tx arbitration queue sets for each TC enabled for
2146          * the VSI. The FW returns the handles to these queue
2147          * sets as part of the response buffer to Add VSI,
2148          * Update VSI, etc. AQ commands. It is expected that
2149          * these queue set handles be associated with the Tx
2150          * queues by the driver as part of the TX queue context
2151          * initialization. This has to be done regardless of
2152          * DCB as by default everything is mapped to TC0.
2153          */
2154         tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);
2155         tx_ctx.rdylist_act = 0;
2156
2157         /* clear the context in the HMC */
2158         err = i40e_clear_lan_tx_queue_context(hw, pf_q);
2159         if (err) {
2160                 dev_info(&vsi->back->pdev->dev,
2161                          "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
2162                          ring->queue_index, pf_q, err);
2163                 return -ENOMEM;
2164         }
2165
2166         /* set the context in the HMC */
2167         err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
2168         if (err) {
2169                 dev_info(&vsi->back->pdev->dev,
2170                          "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
2171                          ring->queue_index, pf_q, err);
2172                 return -ENOMEM;
2173         }
2174
2175         /* Now associate this queue with this PCI function */
2176         qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
2177         qtx_ctl |= ((hw->hmc.hmc_fn_id << I40E_QTX_CTL_PF_INDX_SHIFT)
2178                                                 & I40E_QTX_CTL_PF_INDX_MASK);
2179         wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
2180         i40e_flush(hw);
2181
2182         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
2183
2184         /* cache tail off for easier writes later */
2185         ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);
2186
2187         return 0;
2188 }
2189
2190 /**
2191  * i40e_configure_rx_ring - Configure a receive ring context
2192  * @ring: The Rx ring to configure
2193  *
2194  * Configure the Rx descriptor ring in the HMC context.
2195  **/
2196 static int i40e_configure_rx_ring(struct i40e_ring *ring)
2197 {
2198         struct i40e_vsi *vsi = ring->vsi;
2199         u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
2200         u16 pf_q = vsi->base_queue + ring->queue_index;
2201         struct i40e_hw *hw = &vsi->back->hw;
2202         struct i40e_hmc_obj_rxq rx_ctx;
2203         i40e_status err = 0;
2204
2205         ring->state = 0;
2206
2207         /* clear the context structure first */
2208         memset(&rx_ctx, 0, sizeof(rx_ctx));
2209
2210         ring->rx_buf_len = vsi->rx_buf_len;
2211         ring->rx_hdr_len = vsi->rx_hdr_len;
2212
2213         rx_ctx.dbuff = ring->rx_buf_len >> I40E_RXQ_CTX_DBUFF_SHIFT;
2214         rx_ctx.hbuff = ring->rx_hdr_len >> I40E_RXQ_CTX_HBUFF_SHIFT;
2215
2216         rx_ctx.base = (ring->dma / 128);
2217         rx_ctx.qlen = ring->count;
2218
2219         if (vsi->back->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED) {
2220                 set_ring_16byte_desc_enabled(ring);
2221                 rx_ctx.dsize = 0;
2222         } else {
2223                 rx_ctx.dsize = 1;
2224         }
2225
2226         rx_ctx.dtype = vsi->dtype;
2227         if (vsi->dtype) {
2228                 set_ring_ps_enabled(ring);
2229                 rx_ctx.hsplit_0 = I40E_RX_SPLIT_L2      |
2230                                   I40E_RX_SPLIT_IP      |
2231                                   I40E_RX_SPLIT_TCP_UDP |
2232                                   I40E_RX_SPLIT_SCTP;
2233         } else {
2234                 rx_ctx.hsplit_0 = 0;
2235         }
2236
2237         rx_ctx.rxmax = min_t(u16, vsi->max_frame,
2238                                   (chain_len * ring->rx_buf_len));
2239         rx_ctx.tphrdesc_ena = 1;
2240         rx_ctx.tphwdesc_ena = 1;
2241         rx_ctx.tphdata_ena = 1;
2242         rx_ctx.tphhead_ena = 1;
2243         rx_ctx.lrxqthresh = 2;
2244         rx_ctx.crcstrip = 1;
2245         rx_ctx.l2tsel = 1;
2246         rx_ctx.showiv = 1;
2247
2248         /* clear the context in the HMC */
2249         err = i40e_clear_lan_rx_queue_context(hw, pf_q);
2250         if (err) {
2251                 dev_info(&vsi->back->pdev->dev,
2252                          "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2253                          ring->queue_index, pf_q, err);
2254                 return -ENOMEM;
2255         }
2256
2257         /* set the context in the HMC */
2258         err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
2259         if (err) {
2260                 dev_info(&vsi->back->pdev->dev,
2261                          "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2262                          ring->queue_index, pf_q, err);
2263                 return -ENOMEM;
2264         }
2265
2266         /* cache tail for quicker writes, and clear the reg before use */
2267         ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
2268         writel(0, ring->tail);
2269
2270         i40e_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
2271
2272         return 0;
2273 }
2274
2275 /**
2276  * i40e_vsi_configure_tx - Configure the VSI for Tx
2277  * @vsi: VSI structure describing this set of rings and resources
2278  *
2279  * Configure the Tx VSI for operation.
2280  **/
2281 static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
2282 {
2283         int err = 0;
2284         u16 i;
2285
2286         for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
2287                 err = i40e_configure_tx_ring(vsi->tx_rings[i]);
2288
2289         return err;
2290 }
2291
2292 /**
2293  * i40e_vsi_configure_rx - Configure the VSI for Rx
2294  * @vsi: the VSI being configured
2295  *
2296  * Configure the Rx VSI for operation.
2297  **/
2298 static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
2299 {
2300         int err = 0;
2301         u16 i;
2302
2303         if (vsi->netdev && (vsi->netdev->mtu > ETH_DATA_LEN))
2304                 vsi->max_frame = vsi->netdev->mtu + ETH_HLEN
2305                                + ETH_FCS_LEN + VLAN_HLEN;
2306         else
2307                 vsi->max_frame = I40E_RXBUFFER_2048;
2308
2309         /* figure out correct receive buffer length */
2310         switch (vsi->back->flags & (I40E_FLAG_RX_1BUF_ENABLED |
2311                                     I40E_FLAG_RX_PS_ENABLED)) {
2312         case I40E_FLAG_RX_1BUF_ENABLED:
2313                 vsi->rx_hdr_len = 0;
2314                 vsi->rx_buf_len = vsi->max_frame;
2315                 vsi->dtype = I40E_RX_DTYPE_NO_SPLIT;
2316                 break;
2317         case I40E_FLAG_RX_PS_ENABLED:
2318                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2319                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2320                 vsi->dtype = I40E_RX_DTYPE_HEADER_SPLIT;
2321                 break;
2322         default:
2323                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2324                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2325                 vsi->dtype = I40E_RX_DTYPE_SPLIT_ALWAYS;
2326                 break;
2327         }
2328
2329         /* round up for the chip's needs */
2330         vsi->rx_hdr_len = ALIGN(vsi->rx_hdr_len,
2331                                 (1 << I40E_RXQ_CTX_HBUFF_SHIFT));
2332         vsi->rx_buf_len = ALIGN(vsi->rx_buf_len,
2333                                 (1 << I40E_RXQ_CTX_DBUFF_SHIFT));
2334
2335         /* set up individual rings */
2336         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2337                 err = i40e_configure_rx_ring(vsi->rx_rings[i]);
2338
2339         return err;
2340 }
2341
2342 /**
2343  * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
2344  * @vsi: ptr to the VSI
2345  **/
2346 static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
2347 {
2348         u16 qoffset, qcount;
2349         int i, n;
2350
2351         if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED))
2352                 return;
2353
2354         for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
2355                 if (!(vsi->tc_config.enabled_tc & (1 << n)))
2356                         continue;
2357
2358                 qoffset = vsi->tc_config.tc_info[n].qoffset;
2359                 qcount = vsi->tc_config.tc_info[n].qcount;
2360                 for (i = qoffset; i < (qoffset + qcount); i++) {
2361                         struct i40e_ring *rx_ring = vsi->rx_rings[i];
2362                         struct i40e_ring *tx_ring = vsi->tx_rings[i];
2363                         rx_ring->dcb_tc = n;
2364                         tx_ring->dcb_tc = n;
2365                 }
2366         }
2367 }
2368
2369 /**
2370  * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
2371  * @vsi: ptr to the VSI
2372  **/
2373 static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
2374 {
2375         if (vsi->netdev)
2376                 i40e_set_rx_mode(vsi->netdev);
2377 }
2378
2379 /**
2380  * i40e_vsi_configure - Set up the VSI for action
2381  * @vsi: the VSI being configured
2382  **/
2383 static int i40e_vsi_configure(struct i40e_vsi *vsi)
2384 {
2385         int err;
2386
2387         i40e_set_vsi_rx_mode(vsi);
2388         i40e_restore_vlan(vsi);
2389         i40e_vsi_config_dcb_rings(vsi);
2390         err = i40e_vsi_configure_tx(vsi);
2391         if (!err)
2392                 err = i40e_vsi_configure_rx(vsi);
2393
2394         return err;
2395 }
2396
2397 /**
2398  * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
2399  * @vsi: the VSI being configured
2400  **/
2401 static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
2402 {
2403         struct i40e_pf *pf = vsi->back;
2404         struct i40e_q_vector *q_vector;
2405         struct i40e_hw *hw = &pf->hw;
2406         u16 vector;
2407         int i, q;
2408         u32 val;
2409         u32 qp;
2410
2411         /* The interrupt indexing is offset by 1 in the PFINT_ITRn
2412          * and PFINT_LNKLSTn registers, e.g.:
2413          *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
2414          */
2415         qp = vsi->base_queue;
2416         vector = vsi->base_vector;
2417         for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
2418                 q_vector = vsi->q_vectors[i];
2419                 q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2420                 q_vector->rx.latency_range = I40E_LOW_LATENCY;
2421                 wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
2422                      q_vector->rx.itr);
2423                 q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2424                 q_vector->tx.latency_range = I40E_LOW_LATENCY;
2425                 wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
2426                      q_vector->tx.itr);
2427
2428                 /* Linked list for the queuepairs assigned to this vector */
2429                 wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
2430                 for (q = 0; q < q_vector->num_ringpairs; q++) {
2431                         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
2432                               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT)  |
2433                               (vector      << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
2434                               (qp          << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT)|
2435                               (I40E_QUEUE_TYPE_TX
2436                                       << I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);
2437
2438                         wr32(hw, I40E_QINT_RQCTL(qp), val);
2439
2440                         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
2441                               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT)  |
2442                               (vector      << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
2443                               ((qp+1)      << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT)|
2444                               (I40E_QUEUE_TYPE_RX
2445                                       << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2446
2447                         /* Terminate the linked list */
2448                         if (q == (q_vector->num_ringpairs - 1))
2449                                 val |= (I40E_QUEUE_END_OF_LIST
2450                                            << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2451
2452                         wr32(hw, I40E_QINT_TQCTL(qp), val);
2453                         qp++;
2454                 }
2455         }
2456
2457         i40e_flush(hw);
2458 }
2459
2460 /**
2461  * i40e_enable_misc_int_causes - enable the non-queue interrupts
2462  * @hw: ptr to the hardware info
2463  **/
2464 static void i40e_enable_misc_int_causes(struct i40e_hw *hw)
2465 {
2466         u32 val;
2467
2468         /* clear things first */
2469         wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
2470         rd32(hw, I40E_PFINT_ICR0);         /* read to clear */
2471
2472         val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
2473               I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
2474               I40E_PFINT_ICR0_ENA_GRST_MASK          |
2475               I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
2476               I40E_PFINT_ICR0_ENA_GPIO_MASK          |
2477               I40E_PFINT_ICR0_ENA_STORM_DETECT_MASK  |
2478               I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
2479               I40E_PFINT_ICR0_ENA_VFLR_MASK          |
2480               I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2481
2482         wr32(hw, I40E_PFINT_ICR0_ENA, val);
2483
2484         /* SW_ITR_IDX = 0, but don't change INTENA */
2485         wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTLN_SW_ITR_INDX_MASK |
2486                                         I40E_PFINT_DYN_CTLN_INTENA_MSK_MASK);
2487
2488         /* OTHER_ITR_IDX = 0 */
2489         wr32(hw, I40E_PFINT_STAT_CTL0, 0);
2490 }
2491
2492 /**
2493  * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
2494  * @vsi: the VSI being configured
2495  **/
2496 static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
2497 {
2498         struct i40e_q_vector *q_vector = vsi->q_vectors[0];
2499         struct i40e_pf *pf = vsi->back;
2500         struct i40e_hw *hw = &pf->hw;
2501         u32 val;
2502
2503         /* set the ITR configuration */
2504         q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2505         q_vector->rx.latency_range = I40E_LOW_LATENCY;
2506         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.itr);
2507         q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2508         q_vector->tx.latency_range = I40E_LOW_LATENCY;
2509         wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.itr);
2510
2511         i40e_enable_misc_int_causes(hw);
2512
2513         /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
2514         wr32(hw, I40E_PFINT_LNKLST0, 0);
2515
2516         /* Associate the queue pair to the vector and enable the q int */
2517         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK                  |
2518               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
2519               (I40E_QUEUE_TYPE_TX << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2520
2521         wr32(hw, I40E_QINT_RQCTL(0), val);
2522
2523         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                  |
2524               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
2525               (I40E_QUEUE_END_OF_LIST << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2526
2527         wr32(hw, I40E_QINT_TQCTL(0), val);
2528         i40e_flush(hw);
2529 }
2530
2531 /**
2532  * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
2533  * @pf: board private structure
2534  **/
2535 static void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf)
2536 {
2537         struct i40e_hw *hw = &pf->hw;
2538         u32 val;
2539
2540         val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
2541               I40E_PFINT_DYN_CTL0_CLEARPBA_MASK |
2542               (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);
2543
2544         wr32(hw, I40E_PFINT_DYN_CTL0, val);
2545         i40e_flush(hw);
2546 }
2547
2548 /**
2549  * i40e_irq_dynamic_enable - Enable default interrupt generation settings
2550  * @vsi: pointer to a vsi
2551  * @vector: enable a particular Hw Interrupt vector
2552  **/
2553 void i40e_irq_dynamic_enable(struct i40e_vsi *vsi, int vector)
2554 {
2555         struct i40e_pf *pf = vsi->back;
2556         struct i40e_hw *hw = &pf->hw;
2557         u32 val;
2558
2559         val = I40E_PFINT_DYN_CTLN_INTENA_MASK |
2560               I40E_PFINT_DYN_CTLN_CLEARPBA_MASK |
2561               (I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
2562         wr32(hw, I40E_PFINT_DYN_CTLN(vector - 1), val);
2563         i40e_flush(hw);
2564 }
2565
2566 /**
2567  * i40e_msix_clean_rings - MSIX mode Interrupt Handler
2568  * @irq: interrupt number
2569  * @data: pointer to a q_vector
2570  **/
2571 static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
2572 {
2573         struct i40e_q_vector *q_vector = data;
2574
2575         if (!q_vector->tx.ring && !q_vector->rx.ring)
2576                 return IRQ_HANDLED;
2577
2578         napi_schedule(&q_vector->napi);
2579
2580         return IRQ_HANDLED;
2581 }
2582
2583 /**
2584  * i40e_fdir_clean_rings - Interrupt Handler for FDIR rings
2585  * @irq: interrupt number
2586  * @data: pointer to a q_vector
2587  **/
2588 static irqreturn_t i40e_fdir_clean_rings(int irq, void *data)
2589 {
2590         struct i40e_q_vector *q_vector = data;
2591
2592         if (!q_vector->tx.ring && !q_vector->rx.ring)
2593                 return IRQ_HANDLED;
2594
2595         pr_info("fdir ring cleaning needed\n");
2596
2597         return IRQ_HANDLED;
2598 }
2599
2600 /**
2601  * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
2602  * @vsi: the VSI being configured
2603  * @basename: name for the vector
2604  *
2605  * Allocates MSI-X vectors and requests interrupts from the kernel.
2606  **/
2607 static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
2608 {
2609         int q_vectors = vsi->num_q_vectors;
2610         struct i40e_pf *pf = vsi->back;
2611         int base = vsi->base_vector;
2612         int rx_int_idx = 0;
2613         int tx_int_idx = 0;
2614         int vector, err;
2615
2616         for (vector = 0; vector < q_vectors; vector++) {
2617                 struct i40e_q_vector *q_vector = vsi->q_vectors[vector];
2618
2619                 if (q_vector->tx.ring && q_vector->rx.ring) {
2620                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2621                                  "%s-%s-%d", basename, "TxRx", rx_int_idx++);
2622                         tx_int_idx++;
2623                 } else if (q_vector->rx.ring) {
2624                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2625                                  "%s-%s-%d", basename, "rx", rx_int_idx++);
2626                 } else if (q_vector->tx.ring) {
2627                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2628                                  "%s-%s-%d", basename, "tx", tx_int_idx++);
2629                 } else {
2630                         /* skip this unused q_vector */
2631                         continue;
2632                 }
2633                 err = request_irq(pf->msix_entries[base + vector].vector,
2634                                   vsi->irq_handler,
2635                                   0,
2636                                   q_vector->name,
2637                                   q_vector);
2638                 if (err) {
2639                         dev_info(&pf->pdev->dev,
2640                                  "%s: request_irq failed, error: %d\n",
2641                                  __func__, err);
2642                         goto free_queue_irqs;
2643                 }
2644                 /* assign the mask for this irq */
2645                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2646                                       &q_vector->affinity_mask);
2647         }
2648
2649         return 0;
2650
2651 free_queue_irqs:
2652         while (vector) {
2653                 vector--;
2654                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2655                                       NULL);
2656                 free_irq(pf->msix_entries[base + vector].vector,
2657                          &(vsi->q_vectors[vector]));
2658         }
2659         return err;
2660 }
2661
2662 /**
2663  * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
2664  * @vsi: the VSI being un-configured
2665  **/
2666 static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
2667 {
2668         struct i40e_pf *pf = vsi->back;
2669         struct i40e_hw *hw = &pf->hw;
2670         int base = vsi->base_vector;
2671         int i;
2672
2673         for (i = 0; i < vsi->num_queue_pairs; i++) {
2674                 wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), 0);
2675                 wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), 0);
2676         }
2677
2678         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2679                 for (i = vsi->base_vector;
2680                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2681                         wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);
2682
2683                 i40e_flush(hw);
2684                 for (i = 0; i < vsi->num_q_vectors; i++)
2685                         synchronize_irq(pf->msix_entries[i + base].vector);
2686         } else {
2687                 /* Legacy and MSI mode - this stops all interrupt handling */
2688                 wr32(hw, I40E_PFINT_ICR0_ENA, 0);
2689                 wr32(hw, I40E_PFINT_DYN_CTL0, 0);
2690                 i40e_flush(hw);
2691                 synchronize_irq(pf->pdev->irq);
2692         }
2693 }
2694
2695 /**
2696  * i40e_vsi_enable_irq - Enable IRQ for the given VSI
2697  * @vsi: the VSI being configured
2698  **/
2699 static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
2700 {
2701         struct i40e_pf *pf = vsi->back;
2702         int i;
2703
2704         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2705                 for (i = vsi->base_vector;
2706                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2707                         i40e_irq_dynamic_enable(vsi, i);
2708         } else {
2709                 i40e_irq_dynamic_enable_icr0(pf);
2710         }
2711
2712         return 0;
2713 }
2714
2715 /**
2716  * i40e_stop_misc_vector - Stop the vector that handles non-queue events
2717  * @pf: board private structure
2718  **/
2719 static void i40e_stop_misc_vector(struct i40e_pf *pf)
2720 {
2721         /* Disable ICR 0 */
2722         wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
2723         i40e_flush(&pf->hw);
2724 }
2725
2726 /**
2727  * i40e_intr - MSI/Legacy and non-queue interrupt handler
2728  * @irq: interrupt number
2729  * @data: pointer to a q_vector
2730  *
2731  * This is the handler used for all MSI/Legacy interrupts, and deals
2732  * with both queue and non-queue interrupts.  This is also used in
2733  * MSIX mode to handle the non-queue interrupts.
2734  **/
2735 static irqreturn_t i40e_intr(int irq, void *data)
2736 {
2737         struct i40e_pf *pf = (struct i40e_pf *)data;
2738         struct i40e_hw *hw = &pf->hw;
2739         u32 icr0, icr0_remaining;
2740         u32 val, ena_mask;
2741
2742         icr0 = rd32(hw, I40E_PFINT_ICR0);
2743
2744         /* if sharing a legacy IRQ, we might get called w/o an intr pending */
2745         if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
2746                 return IRQ_NONE;
2747
2748         val = rd32(hw, I40E_PFINT_DYN_CTL0);
2749         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
2750         wr32(hw, I40E_PFINT_DYN_CTL0, val);
2751
2752         ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);
2753
2754         /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
2755         if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
2756
2757                 /* temporarily disable queue cause for NAPI processing */
2758                 u32 qval = rd32(hw, I40E_QINT_RQCTL(0));
2759                 qval &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
2760                 wr32(hw, I40E_QINT_RQCTL(0), qval);
2761
2762                 qval = rd32(hw, I40E_QINT_TQCTL(0));
2763                 qval &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
2764                 wr32(hw, I40E_QINT_TQCTL(0), qval);
2765                 i40e_flush(hw);
2766
2767                 if (!test_bit(__I40E_DOWN, &pf->state))
2768                         napi_schedule(&pf->vsi[pf->lan_vsi]->q_vectors[0]->napi);
2769         }
2770
2771         if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
2772                 ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2773                 set_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
2774         }
2775
2776         if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
2777                 ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
2778                 set_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
2779         }
2780
2781         if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
2782                 ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
2783                 set_bit(__I40E_VFLR_EVENT_PENDING, &pf->state);
2784         }
2785
2786         if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
2787                 if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
2788                         set_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
2789                 ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
2790                 val = rd32(hw, I40E_GLGEN_RSTAT);
2791                 val = (val & I40E_GLGEN_RSTAT_RESET_TYPE_MASK)
2792                        >> I40E_GLGEN_RSTAT_RESET_TYPE_SHIFT;
2793                 if (val & I40E_RESET_CORER)
2794                         pf->corer_count++;
2795                 else if (val & I40E_RESET_GLOBR)
2796                         pf->globr_count++;
2797                 else if (val & I40E_RESET_EMPR)
2798                         pf->empr_count++;
2799         }
2800
2801         /* If a critical error is pending we have no choice but to reset the
2802          * device.
2803          * Report and mask out any remaining unexpected interrupts.
2804          */
2805         icr0_remaining = icr0 & ena_mask;
2806         if (icr0_remaining) {
2807                 dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
2808                          icr0_remaining);
2809                 if ((icr0_remaining & I40E_PFINT_ICR0_HMC_ERR_MASK) ||
2810                     (icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
2811                     (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
2812                     (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK) ||
2813                     (icr0_remaining & I40E_PFINT_ICR0_MAL_DETECT_MASK)) {
2814                         if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
2815                                 dev_info(&pf->pdev->dev, "HMC error interrupt\n");
2816                         } else {
2817                                 dev_info(&pf->pdev->dev, "device will be reset\n");
2818                                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
2819                                 i40e_service_event_schedule(pf);
2820                         }
2821                 }
2822                 ena_mask &= ~icr0_remaining;
2823         }
2824
2825         /* re-enable interrupt causes */
2826         wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
2827         i40e_flush(hw);
2828         if (!test_bit(__I40E_DOWN, &pf->state)) {
2829                 i40e_service_event_schedule(pf);
2830                 i40e_irq_dynamic_enable_icr0(pf);
2831         }
2832
2833         return IRQ_HANDLED;
2834 }
2835
2836 /**
2837  * i40e_map_vector_to_qp - Assigns the queue pair to the vector
2838  * @vsi: the VSI being configured
2839  * @v_idx: vector index
2840  * @qp_idx: queue pair index
2841  **/
2842 static void map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
2843 {
2844         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
2845         struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
2846         struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];
2847
2848         tx_ring->q_vector = q_vector;
2849         tx_ring->next = q_vector->tx.ring;
2850         q_vector->tx.ring = tx_ring;
2851         q_vector->tx.count++;
2852
2853         rx_ring->q_vector = q_vector;
2854         rx_ring->next = q_vector->rx.ring;
2855         q_vector->rx.ring = rx_ring;
2856         q_vector->rx.count++;
2857 }
2858
2859 /**
2860  * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
2861  * @vsi: the VSI being configured
2862  *
2863  * This function maps descriptor rings to the queue-specific vectors
2864  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
2865  * one vector per queue pair, but on a constrained vector budget, we
2866  * group the queue pairs as "efficiently" as possible.
2867  **/
2868 static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
2869 {
2870         int qp_remaining = vsi->num_queue_pairs;
2871         int q_vectors = vsi->num_q_vectors;
2872         int num_ringpairs;
2873         int v_start = 0;
2874         int qp_idx = 0;
2875
2876         /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
2877          * group them so there are multiple queues per vector.
2878          */
2879         for (; v_start < q_vectors && qp_remaining; v_start++) {
2880                 struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];
2881
2882                 num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);
2883
2884                 q_vector->num_ringpairs = num_ringpairs;
2885
2886                 q_vector->rx.count = 0;
2887                 q_vector->tx.count = 0;
2888                 q_vector->rx.ring = NULL;
2889                 q_vector->tx.ring = NULL;
2890
2891                 while (num_ringpairs--) {
2892                         map_vector_to_qp(vsi, v_start, qp_idx);
2893                         qp_idx++;
2894                         qp_remaining--;
2895                 }
2896         }
2897 }
2898
2899 /**
2900  * i40e_vsi_request_irq - Request IRQ from the OS
2901  * @vsi: the VSI being configured
2902  * @basename: name for the vector
2903  **/
2904 static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
2905 {
2906         struct i40e_pf *pf = vsi->back;
2907         int err;
2908
2909         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
2910                 err = i40e_vsi_request_irq_msix(vsi, basename);
2911         else if (pf->flags & I40E_FLAG_MSI_ENABLED)
2912                 err = request_irq(pf->pdev->irq, i40e_intr, 0,
2913                                   pf->misc_int_name, pf);
2914         else
2915                 err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
2916                                   pf->misc_int_name, pf);
2917
2918         if (err)
2919                 dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);
2920
2921         return err;
2922 }
2923
2924 #ifdef CONFIG_NET_POLL_CONTROLLER
2925 /**
2926  * i40e_netpoll - A Polling 'interrupt'handler
2927  * @netdev: network interface device structure
2928  *
2929  * This is used by netconsole to send skbs without having to re-enable
2930  * interrupts.  It's not called while the normal interrupt routine is executing.
2931  **/
2932 static void i40e_netpoll(struct net_device *netdev)
2933 {
2934         struct i40e_netdev_priv *np = netdev_priv(netdev);
2935         struct i40e_vsi *vsi = np->vsi;
2936         struct i40e_pf *pf = vsi->back;
2937         int i;
2938
2939         /* if interface is down do nothing */
2940         if (test_bit(__I40E_DOWN, &vsi->state))
2941                 return;
2942
2943         pf->flags |= I40E_FLAG_IN_NETPOLL;
2944         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2945                 for (i = 0; i < vsi->num_q_vectors; i++)
2946                         i40e_msix_clean_rings(0, vsi->q_vectors[i]);
2947         } else {
2948                 i40e_intr(pf->pdev->irq, netdev);
2949         }
2950         pf->flags &= ~I40E_FLAG_IN_NETPOLL;
2951 }
2952 #endif
2953
2954 /**
2955  * i40e_vsi_control_tx - Start or stop a VSI's rings
2956  * @vsi: the VSI being configured
2957  * @enable: start or stop the rings
2958  **/
2959 static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
2960 {
2961         struct i40e_pf *pf = vsi->back;
2962         struct i40e_hw *hw = &pf->hw;
2963         int i, j, pf_q;
2964         u32 tx_reg;
2965
2966         pf_q = vsi->base_queue;
2967         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
2968                 j = 1000;
2969                 do {
2970                         usleep_range(1000, 2000);
2971                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
2972                 } while (j-- && ((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT)
2973                                ^ (tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT)) & 1);
2974
2975                 if (enable) {
2976                         /* is STAT set ? */
2977                         if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK)) {
2978                                 dev_info(&pf->pdev->dev,
2979                                          "Tx %d already enabled\n", i);
2980                                 continue;
2981                         }
2982                 } else {
2983                         /* is !STAT set ? */
2984                         if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK)) {
2985                                 dev_info(&pf->pdev->dev,
2986                                          "Tx %d already disabled\n", i);
2987                                 continue;
2988                         }
2989                 }
2990
2991                 /* turn on/off the queue */
2992                 if (enable)
2993                         tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK |
2994                                   I40E_QTX_ENA_QENA_STAT_MASK;
2995                 else
2996                         tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
2997
2998                 wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
2999
3000                 /* wait for the change to finish */
3001                 for (j = 0; j < 10; j++) {
3002                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3003                         if (enable) {
3004                                 if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3005                                         break;
3006                         } else {
3007                                 if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3008                                         break;
3009                         }
3010
3011                         udelay(10);
3012                 }
3013                 if (j >= 10) {
3014                         dev_info(&pf->pdev->dev, "Tx ring %d %sable timeout\n",
3015                                  pf_q, (enable ? "en" : "dis"));
3016                         return -ETIMEDOUT;
3017                 }
3018         }
3019
3020         return 0;
3021 }
3022
3023 /**
3024  * i40e_vsi_control_rx - Start or stop a VSI's rings
3025  * @vsi: the VSI being configured
3026  * @enable: start or stop the rings
3027  **/
3028 static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
3029 {
3030         struct i40e_pf *pf = vsi->back;
3031         struct i40e_hw *hw = &pf->hw;
3032         int i, j, pf_q;
3033         u32 rx_reg;
3034
3035         pf_q = vsi->base_queue;
3036         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3037                 j = 1000;
3038                 do {
3039                         usleep_range(1000, 2000);
3040                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3041                 } while (j-- && ((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT)
3042                                ^ (rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT)) & 1);
3043
3044                 if (enable) {
3045                         /* is STAT set ? */
3046                         if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3047                                 continue;
3048                 } else {
3049                         /* is !STAT set ? */
3050                         if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3051                                 continue;
3052                 }
3053
3054                 /* turn on/off the queue */
3055                 if (enable)
3056                         rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK |
3057                                   I40E_QRX_ENA_QENA_STAT_MASK;
3058                 else
3059                         rx_reg &= ~(I40E_QRX_ENA_QENA_REQ_MASK |
3060                                   I40E_QRX_ENA_QENA_STAT_MASK);
3061                 wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
3062
3063                 /* wait for the change to finish */
3064                 for (j = 0; j < 10; j++) {
3065                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3066
3067                         if (enable) {
3068                                 if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3069                                         break;
3070                         } else {
3071                                 if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3072                                         break;
3073                         }
3074
3075                         udelay(10);
3076                 }
3077                 if (j >= 10) {
3078                         dev_info(&pf->pdev->dev, "Rx ring %d %sable timeout\n",
3079                                  pf_q, (enable ? "en" : "dis"));
3080                         return -ETIMEDOUT;
3081                 }
3082         }
3083
3084         return 0;
3085 }
3086
3087 /**
3088  * i40e_vsi_control_rings - Start or stop a VSI's rings
3089  * @vsi: the VSI being configured
3090  * @enable: start or stop the rings
3091  **/
3092 static int i40e_vsi_control_rings(struct i40e_vsi *vsi, bool request)
3093 {
3094         int ret;
3095
3096         /* do rx first for enable and last for disable */
3097         if (request) {
3098                 ret = i40e_vsi_control_rx(vsi, request);
3099                 if (ret)
3100                         return ret;
3101                 ret = i40e_vsi_control_tx(vsi, request);
3102         } else {
3103                 ret = i40e_vsi_control_tx(vsi, request);
3104                 if (ret)
3105                         return ret;
3106                 ret = i40e_vsi_control_rx(vsi, request);
3107         }
3108
3109         return ret;
3110 }
3111
3112 /**
3113  * i40e_vsi_free_irq - Free the irq association with the OS
3114  * @vsi: the VSI being configured
3115  **/
3116 static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
3117 {
3118         struct i40e_pf *pf = vsi->back;
3119         struct i40e_hw *hw = &pf->hw;
3120         int base = vsi->base_vector;
3121         u32 val, qp;
3122         int i;
3123
3124         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3125                 if (!vsi->q_vectors)
3126                         return;
3127
3128                 for (i = 0; i < vsi->num_q_vectors; i++) {
3129                         u16 vector = i + base;
3130
3131                         /* free only the irqs that were actually requested */
3132                         if (vsi->q_vectors[i]->num_ringpairs == 0)
3133                                 continue;
3134
3135                         /* clear the affinity_mask in the IRQ descriptor */
3136                         irq_set_affinity_hint(pf->msix_entries[vector].vector,
3137                                               NULL);
3138                         free_irq(pf->msix_entries[vector].vector,
3139                                  vsi->q_vectors[i]);
3140
3141                         /* Tear down the interrupt queue link list
3142                          *
3143                          * We know that they come in pairs and always
3144                          * the Rx first, then the Tx.  To clear the
3145                          * link list, stick the EOL value into the
3146                          * next_q field of the registers.
3147                          */
3148                         val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
3149                         qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3150                                 >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3151                         val |= I40E_QUEUE_END_OF_LIST
3152                                 << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3153                         wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);
3154
3155                         while (qp != I40E_QUEUE_END_OF_LIST) {
3156                                 u32 next;
3157
3158                                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3159
3160                                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3161                                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3162                                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3163                                          I40E_QINT_RQCTL_INTEVENT_MASK);
3164
3165                                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3166                                          I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3167
3168                                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3169
3170                                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3171
3172                                 next = (val & I40E_QINT_TQCTL_NEXTQ_INDX_MASK)
3173                                         >> I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT;
3174
3175                                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3176                                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3177                                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3178                                          I40E_QINT_TQCTL_INTEVENT_MASK);
3179
3180                                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3181                                          I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3182
3183                                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3184                                 qp = next;
3185                         }
3186                 }
3187         } else {
3188                 free_irq(pf->pdev->irq, pf);
3189
3190                 val = rd32(hw, I40E_PFINT_LNKLST0);
3191                 qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3192                         >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3193                 val |= I40E_QUEUE_END_OF_LIST
3194                         << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
3195                 wr32(hw, I40E_PFINT_LNKLST0, val);
3196
3197                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3198                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3199                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3200                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3201                          I40E_QINT_RQCTL_INTEVENT_MASK);
3202
3203                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3204                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3205
3206                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3207
3208                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3209
3210                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3211                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3212                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3213                          I40E_QINT_TQCTL_INTEVENT_MASK);
3214
3215                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3216                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3217
3218                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3219         }
3220 }
3221
3222 /**
3223  * i40e_free_q_vector - Free memory allocated for specific interrupt vector
3224  * @vsi: the VSI being configured
3225  * @v_idx: Index of vector to be freed
3226  *
3227  * This function frees the memory allocated to the q_vector.  In addition if
3228  * NAPI is enabled it will delete any references to the NAPI struct prior
3229  * to freeing the q_vector.
3230  **/
3231 static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
3232 {
3233         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3234         struct i40e_ring *ring;
3235
3236         if (!q_vector)
3237                 return;
3238
3239         /* disassociate q_vector from rings */
3240         i40e_for_each_ring(ring, q_vector->tx)
3241                 ring->q_vector = NULL;
3242
3243         i40e_for_each_ring(ring, q_vector->rx)
3244                 ring->q_vector = NULL;
3245
3246         /* only VSI w/ an associated netdev is set up w/ NAPI */
3247         if (vsi->netdev)
3248                 netif_napi_del(&q_vector->napi);
3249
3250         vsi->q_vectors[v_idx] = NULL;
3251
3252         kfree_rcu(q_vector, rcu);
3253 }
3254
3255 /**
3256  * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
3257  * @vsi: the VSI being un-configured
3258  *
3259  * This frees the memory allocated to the q_vectors and
3260  * deletes references to the NAPI struct.
3261  **/
3262 static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
3263 {
3264         int v_idx;
3265
3266         for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
3267                 i40e_free_q_vector(vsi, v_idx);
3268 }
3269
3270 /**
3271  * i40e_reset_interrupt_capability - Disable interrupt setup in OS
3272  * @pf: board private structure
3273  **/
3274 static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
3275 {
3276         /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
3277         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3278                 pci_disable_msix(pf->pdev);
3279                 kfree(pf->msix_entries);
3280                 pf->msix_entries = NULL;
3281         } else if (pf->flags & I40E_FLAG_MSI_ENABLED) {
3282                 pci_disable_msi(pf->pdev);
3283         }
3284         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED);
3285 }
3286
3287 /**
3288  * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
3289  * @pf: board private structure
3290  *
3291  * We go through and clear interrupt specific resources and reset the structure
3292  * to pre-load conditions
3293  **/
3294 static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
3295 {
3296         int i;
3297
3298         i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);
3299         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
3300                 if (pf->vsi[i])
3301                         i40e_vsi_free_q_vectors(pf->vsi[i]);
3302         i40e_reset_interrupt_capability(pf);
3303 }
3304
3305 /**
3306  * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
3307  * @vsi: the VSI being configured
3308  **/
3309 static void i40e_napi_enable_all(struct i40e_vsi *vsi)
3310 {
3311         int q_idx;
3312
3313         if (!vsi->netdev)
3314                 return;
3315
3316         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3317                 napi_enable(&vsi->q_vectors[q_idx]->napi);
3318 }
3319
3320 /**
3321  * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
3322  * @vsi: the VSI being configured
3323  **/
3324 static void i40e_napi_disable_all(struct i40e_vsi *vsi)
3325 {
3326         int q_idx;
3327
3328         if (!vsi->netdev)
3329                 return;
3330
3331         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3332                 napi_disable(&vsi->q_vectors[q_idx]->napi);
3333 }
3334
3335 /**
3336  * i40e_quiesce_vsi - Pause a given VSI
3337  * @vsi: the VSI being paused
3338  **/
3339 static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
3340 {
3341         if (test_bit(__I40E_DOWN, &vsi->state))
3342                 return;
3343
3344         set_bit(__I40E_NEEDS_RESTART, &vsi->state);
3345         if (vsi->netdev && netif_running(vsi->netdev)) {
3346                 vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
3347         } else {
3348                 set_bit(__I40E_DOWN, &vsi->state);
3349                 i40e_down(vsi);
3350         }
3351 }
3352
3353 /**
3354  * i40e_unquiesce_vsi - Resume a given VSI
3355  * @vsi: the VSI being resumed
3356  **/
3357 static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
3358 {
3359         if (!test_bit(__I40E_NEEDS_RESTART, &vsi->state))
3360                 return;
3361
3362         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
3363         if (vsi->netdev && netif_running(vsi->netdev))
3364                 vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
3365         else
3366                 i40e_up(vsi);   /* this clears the DOWN bit */
3367 }
3368
3369 /**
3370  * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
3371  * @pf: the PF
3372  **/
3373 static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
3374 {
3375         int v;
3376
3377         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3378                 if (pf->vsi[v])
3379                         i40e_quiesce_vsi(pf->vsi[v]);
3380         }
3381 }
3382
3383 /**
3384  * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
3385  * @pf: the PF
3386  **/
3387 static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
3388 {
3389         int v;
3390
3391         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3392                 if (pf->vsi[v])
3393                         i40e_unquiesce_vsi(pf->vsi[v]);
3394         }
3395 }
3396
3397 /**
3398  * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
3399  * @dcbcfg: the corresponding DCBx configuration structure
3400  *
3401  * Return the number of TCs from given DCBx configuration
3402  **/
3403 static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
3404 {
3405         u8 num_tc = 0;
3406         int i;
3407
3408         /* Scan the ETS Config Priority Table to find
3409          * traffic class enabled for a given priority
3410          * and use the traffic class index to get the
3411          * number of traffic classes enabled
3412          */
3413         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3414                 if (dcbcfg->etscfg.prioritytable[i] > num_tc)
3415                         num_tc = dcbcfg->etscfg.prioritytable[i];
3416         }
3417
3418         /* Traffic class index starts from zero so
3419          * increment to return the actual count
3420          */
3421         return num_tc + 1;
3422 }
3423
3424 /**
3425  * i40e_dcb_get_enabled_tc - Get enabled traffic classes
3426  * @dcbcfg: the corresponding DCBx configuration structure
3427  *
3428  * Query the current DCB configuration and return the number of
3429  * traffic classes enabled from the given DCBX config
3430  **/
3431 static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
3432 {
3433         u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
3434         u8 enabled_tc = 1;
3435         u8 i;
3436
3437         for (i = 0; i < num_tc; i++)
3438                 enabled_tc |= 1 << i;
3439
3440         return enabled_tc;
3441 }
3442
3443 /**
3444  * i40e_pf_get_num_tc - Get enabled traffic classes for PF
3445  * @pf: PF being queried
3446  *
3447  * Return number of traffic classes enabled for the given PF
3448  **/
3449 static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
3450 {
3451         struct i40e_hw *hw = &pf->hw;
3452         u8 i, enabled_tc;
3453         u8 num_tc = 0;
3454         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3455
3456         /* If DCB is not enabled then always in single TC */
3457         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3458                 return 1;
3459
3460         /* MFP mode return count of enabled TCs for this PF */
3461         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
3462                 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3463                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3464                         if (enabled_tc & (1 << i))
3465                                 num_tc++;
3466                 }
3467                 return num_tc;
3468         }
3469
3470         /* SFP mode will be enabled for all TCs on port */
3471         return i40e_dcb_get_num_tc(dcbcfg);
3472 }
3473
3474 /**
3475  * i40e_pf_get_default_tc - Get bitmap for first enabled TC
3476  * @pf: PF being queried
3477  *
3478  * Return a bitmap for first enabled traffic class for this PF.
3479  **/
3480 static u8 i40e_pf_get_default_tc(struct i40e_pf *pf)
3481 {
3482         u8 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3483         u8 i = 0;
3484
3485         if (!enabled_tc)
3486                 return 0x1; /* TC0 */
3487
3488         /* Find the first enabled TC */
3489         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3490                 if (enabled_tc & (1 << i))
3491                         break;
3492         }
3493
3494         return 1 << i;
3495 }
3496
3497 /**
3498  * i40e_pf_get_pf_tc_map - Get bitmap for enabled traffic classes
3499  * @pf: PF being queried
3500  *
3501  * Return a bitmap for enabled traffic classes for this PF.
3502  **/
3503 static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
3504 {
3505         /* If DCB is not enabled for this PF then just return default TC */
3506         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3507                 return i40e_pf_get_default_tc(pf);
3508
3509         /* MFP mode will have enabled TCs set by FW */
3510         if (pf->flags & I40E_FLAG_MFP_ENABLED)
3511                 return pf->hw.func_caps.enabled_tcmap;
3512
3513         /* SFP mode we want PF to be enabled for all TCs */
3514         return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
3515 }
3516
3517 /**
3518  * i40e_vsi_get_bw_info - Query VSI BW Information
3519  * @vsi: the VSI being queried
3520  *
3521  * Returns 0 on success, negative value on failure
3522  **/
3523 static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
3524 {
3525         struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
3526         struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
3527         struct i40e_pf *pf = vsi->back;
3528         struct i40e_hw *hw = &pf->hw;
3529         i40e_status aq_ret;
3530         u32 tc_bw_max;
3531         int i;
3532
3533         /* Get the VSI level BW configuration */
3534         aq_ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
3535         if (aq_ret) {
3536                 dev_info(&pf->pdev->dev,
3537                          "couldn't get pf vsi bw config, err %d, aq_err %d\n",
3538                          aq_ret, pf->hw.aq.asq_last_status);
3539                 return -EINVAL;
3540         }
3541
3542         /* Get the VSI level BW configuration per TC */
3543         aq_ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
3544                                                   NULL);
3545         if (aq_ret) {
3546                 dev_info(&pf->pdev->dev,
3547                          "couldn't get pf vsi ets bw config, err %d, aq_err %d\n",
3548                          aq_ret, pf->hw.aq.asq_last_status);
3549                 return -EINVAL;
3550         }
3551
3552         if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
3553                 dev_info(&pf->pdev->dev,
3554                          "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
3555                          bw_config.tc_valid_bits,
3556                          bw_ets_config.tc_valid_bits);
3557                 /* Still continuing */
3558         }
3559
3560         vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
3561         vsi->bw_max_quanta = bw_config.max_bw;
3562         tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
3563                     (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
3564         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3565                 vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
3566                 vsi->bw_ets_limit_credits[i] =
3567                                         le16_to_cpu(bw_ets_config.credits[i]);
3568                 /* 3 bits out of 4 for each TC */
3569                 vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
3570         }
3571
3572         return 0;
3573 }
3574
3575 /**
3576  * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
3577  * @vsi: the VSI being configured
3578  * @enabled_tc: TC bitmap
3579  * @bw_credits: BW shared credits per TC
3580  *
3581  * Returns 0 on success, negative value on failure
3582  **/
3583 static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
3584                                        u8 *bw_share)
3585 {
3586         struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
3587         i40e_status aq_ret;
3588         int i;
3589
3590         bw_data.tc_valid_bits = enabled_tc;
3591         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3592                 bw_data.tc_bw_credits[i] = bw_share[i];
3593
3594         aq_ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, vsi->seid, &bw_data,
3595                                           NULL);
3596         if (aq_ret) {
3597                 dev_info(&vsi->back->pdev->dev,
3598                          "%s: AQ command Config VSI BW allocation per TC failed = %d\n",
3599                          __func__, vsi->back->hw.aq.asq_last_status);
3600                 return -EINVAL;
3601         }
3602
3603         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3604                 vsi->info.qs_handle[i] = bw_data.qs_handles[i];
3605
3606         return 0;
3607 }
3608
3609 /**
3610  * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
3611  * @vsi: the VSI being configured
3612  * @enabled_tc: TC map to be enabled
3613  *
3614  **/
3615 static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3616 {
3617         struct net_device *netdev = vsi->netdev;
3618         struct i40e_pf *pf = vsi->back;
3619         struct i40e_hw *hw = &pf->hw;
3620         u8 netdev_tc = 0;
3621         int i;
3622         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3623
3624         if (!netdev)
3625                 return;
3626
3627         if (!enabled_tc) {
3628                 netdev_reset_tc(netdev);
3629                 return;
3630         }
3631
3632         /* Set up actual enabled TCs on the VSI */
3633         if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
3634                 return;
3635
3636         /* set per TC queues for the VSI */
3637         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3638                 /* Only set TC queues for enabled tcs
3639                  *
3640                  * e.g. For a VSI that has TC0 and TC3 enabled the
3641                  * enabled_tc bitmap would be 0x00001001; the driver
3642                  * will set the numtc for netdev as 2 that will be
3643                  * referenced by the netdev layer as TC 0 and 1.
3644                  */
3645                 if (vsi->tc_config.enabled_tc & (1 << i))
3646                         netdev_set_tc_queue(netdev,
3647                                         vsi->tc_config.tc_info[i].netdev_tc,
3648                                         vsi->tc_config.tc_info[i].qcount,
3649                                         vsi->tc_config.tc_info[i].qoffset);
3650         }
3651
3652         /* Assign UP2TC map for the VSI */
3653         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3654                 /* Get the actual TC# for the UP */
3655                 u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
3656                 /* Get the mapped netdev TC# for the UP */
3657                 netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
3658                 netdev_set_prio_tc_map(netdev, i, netdev_tc);
3659         }
3660 }
3661
3662 /**
3663  * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
3664  * @vsi: the VSI being configured
3665  * @ctxt: the ctxt buffer returned from AQ VSI update param command
3666  **/
3667 static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
3668                                       struct i40e_vsi_context *ctxt)
3669 {
3670         /* copy just the sections touched not the entire info
3671          * since not all sections are valid as returned by
3672          * update vsi params
3673          */
3674         vsi->info.mapping_flags = ctxt->info.mapping_flags;
3675         memcpy(&vsi->info.queue_mapping,
3676                &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
3677         memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
3678                sizeof(vsi->info.tc_mapping));
3679 }
3680
3681 /**
3682  * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
3683  * @vsi: VSI to be configured
3684  * @enabled_tc: TC bitmap
3685  *
3686  * This configures a particular VSI for TCs that are mapped to the
3687  * given TC bitmap. It uses default bandwidth share for TCs across
3688  * VSIs to configure TC for a particular VSI.
3689  *
3690  * NOTE:
3691  * It is expected that the VSI queues have been quisced before calling
3692  * this function.
3693  **/
3694 static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3695 {
3696         u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
3697         struct i40e_vsi_context ctxt;
3698         int ret = 0;
3699         int i;
3700
3701         /* Check if enabled_tc is same as existing or new TCs */
3702         if (vsi->tc_config.enabled_tc == enabled_tc)
3703                 return ret;
3704
3705         /* Enable ETS TCs with equal BW Share for now across all VSIs */
3706         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3707                 if (enabled_tc & (1 << i))
3708                         bw_share[i] = 1;
3709         }
3710
3711         ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
3712         if (ret) {
3713                 dev_info(&vsi->back->pdev->dev,
3714                          "Failed configuring TC map %d for VSI %d\n",
3715                          enabled_tc, vsi->seid);
3716                 goto out;
3717         }
3718
3719         /* Update Queue Pairs Mapping for currently enabled UPs */
3720         ctxt.seid = vsi->seid;
3721         ctxt.pf_num = vsi->back->hw.pf_id;
3722         ctxt.vf_num = 0;
3723         ctxt.uplink_seid = vsi->uplink_seid;
3724         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
3725         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
3726
3727         /* Update the VSI after updating the VSI queue-mapping information */
3728         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
3729         if (ret) {
3730                 dev_info(&vsi->back->pdev->dev,
3731                          "update vsi failed, aq_err=%d\n",
3732                          vsi->back->hw.aq.asq_last_status);
3733                 goto out;
3734         }
3735         /* update the local VSI info with updated queue map */
3736         i40e_vsi_update_queue_map(vsi, &ctxt);
3737         vsi->info.valid_sections = 0;
3738
3739         /* Update current VSI BW information */
3740         ret = i40e_vsi_get_bw_info(vsi);
3741         if (ret) {
3742                 dev_info(&vsi->back->pdev->dev,
3743                          "Failed updating vsi bw info, aq_err=%d\n",
3744                          vsi->back->hw.aq.asq_last_status);
3745                 goto out;
3746         }
3747
3748         /* Update the netdev TC setup */
3749         i40e_vsi_config_netdev_tc(vsi, enabled_tc);
3750 out:
3751         return ret;
3752 }
3753
3754 /**
3755  * i40e_up_complete - Finish the last steps of bringing up a connection
3756  * @vsi: the VSI being configured
3757  **/
3758 static int i40e_up_complete(struct i40e_vsi *vsi)
3759 {
3760         struct i40e_pf *pf = vsi->back;
3761         int err;
3762
3763         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
3764                 i40e_vsi_configure_msix(vsi);
3765         else
3766                 i40e_configure_msi_and_legacy(vsi);
3767
3768         /* start rings */
3769         err = i40e_vsi_control_rings(vsi, true);
3770         if (err)
3771                 return err;
3772
3773         clear_bit(__I40E_DOWN, &vsi->state);
3774         i40e_napi_enable_all(vsi);
3775         i40e_vsi_enable_irq(vsi);
3776
3777         if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
3778             (vsi->netdev)) {
3779                 netdev_info(vsi->netdev, "NIC Link is Up\n");
3780                 netif_tx_start_all_queues(vsi->netdev);
3781                 netif_carrier_on(vsi->netdev);
3782         } else if (vsi->netdev) {
3783                 netdev_info(vsi->netdev, "NIC Link is Down\n");
3784         }
3785         i40e_service_event_schedule(pf);
3786
3787         return 0;
3788 }
3789
3790 /**
3791  * i40e_vsi_reinit_locked - Reset the VSI
3792  * @vsi: the VSI being configured
3793  *
3794  * Rebuild the ring structs after some configuration
3795  * has changed, e.g. MTU size.
3796  **/
3797 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
3798 {
3799         struct i40e_pf *pf = vsi->back;
3800
3801         WARN_ON(in_interrupt());
3802         while (test_and_set_bit(__I40E_CONFIG_BUSY, &pf->state))
3803                 usleep_range(1000, 2000);
3804         i40e_down(vsi);
3805
3806         /* Give a VF some time to respond to the reset.  The
3807          * two second wait is based upon the watchdog cycle in
3808          * the VF driver.
3809          */
3810         if (vsi->type == I40E_VSI_SRIOV)
3811                 msleep(2000);
3812         i40e_up(vsi);
3813         clear_bit(__I40E_CONFIG_BUSY, &pf->state);
3814 }
3815
3816 /**
3817  * i40e_up - Bring the connection back up after being down
3818  * @vsi: the VSI being configured
3819  **/
3820 int i40e_up(struct i40e_vsi *vsi)
3821 {
3822         int err;
3823
3824         err = i40e_vsi_configure(vsi);
3825         if (!err)
3826                 err = i40e_up_complete(vsi);
3827
3828         return err;
3829 }
3830
3831 /**
3832  * i40e_down - Shutdown the connection processing
3833  * @vsi: the VSI being stopped
3834  **/
3835 void i40e_down(struct i40e_vsi *vsi)
3836 {
3837         int i;
3838
3839         /* It is assumed that the caller of this function
3840          * sets the vsi->state __I40E_DOWN bit.
3841          */
3842         if (vsi->netdev) {
3843                 netif_carrier_off(vsi->netdev);
3844                 netif_tx_disable(vsi->netdev);
3845         }
3846         i40e_vsi_disable_irq(vsi);
3847         i40e_vsi_control_rings(vsi, false);
3848         i40e_napi_disable_all(vsi);
3849
3850         for (i = 0; i < vsi->num_queue_pairs; i++) {
3851                 i40e_clean_tx_ring(vsi->tx_rings[i]);
3852                 i40e_clean_rx_ring(vsi->rx_rings[i]);
3853         }
3854 }
3855
3856 /**
3857  * i40e_setup_tc - configure multiple traffic classes
3858  * @netdev: net device to configure
3859  * @tc: number of traffic classes to enable
3860  **/
3861 static int i40e_setup_tc(struct net_device *netdev, u8 tc)
3862 {
3863         struct i40e_netdev_priv *np = netdev_priv(netdev);
3864         struct i40e_vsi *vsi = np->vsi;
3865         struct i40e_pf *pf = vsi->back;
3866         u8 enabled_tc = 0;
3867         int ret = -EINVAL;
3868         int i;
3869
3870         /* Check if DCB enabled to continue */
3871         if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) {
3872                 netdev_info(netdev, "DCB is not enabled for adapter\n");
3873                 goto exit;
3874         }
3875
3876         /* Check if MFP enabled */
3877         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
3878                 netdev_info(netdev, "Configuring TC not supported in MFP mode\n");
3879                 goto exit;
3880         }
3881
3882         /* Check whether tc count is within enabled limit */
3883         if (tc > i40e_pf_get_num_tc(pf)) {
3884                 netdev_info(netdev, "TC count greater than enabled on link for adapter\n");
3885                 goto exit;
3886         }
3887
3888         /* Generate TC map for number of tc requested */
3889         for (i = 0; i < tc; i++)
3890                 enabled_tc |= (1 << i);
3891
3892         /* Requesting same TC configuration as already enabled */
3893         if (enabled_tc == vsi->tc_config.enabled_tc)
3894                 return 0;
3895
3896         /* Quiesce VSI queues */
3897         i40e_quiesce_vsi(vsi);
3898
3899         /* Configure VSI for enabled TCs */
3900         ret = i40e_vsi_config_tc(vsi, enabled_tc);
3901         if (ret) {
3902                 netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
3903                             vsi->seid);
3904                 goto exit;
3905         }
3906
3907         /* Unquiesce VSI */
3908         i40e_unquiesce_vsi(vsi);
3909
3910 exit:
3911         return ret;
3912 }
3913
3914 /**
3915  * i40e_open - Called when a network interface is made active
3916  * @netdev: network interface device structure
3917  *
3918  * The open entry point is called when a network interface is made
3919  * active by the system (IFF_UP).  At this point all resources needed
3920  * for transmit and receive operations are allocated, the interrupt
3921  * handler is registered with the OS, the netdev watchdog subtask is
3922  * enabled, and the stack is notified that the interface is ready.
3923  *
3924  * Returns 0 on success, negative value on failure
3925  **/
3926 static int i40e_open(struct net_device *netdev)
3927 {
3928         struct i40e_netdev_priv *np = netdev_priv(netdev);
3929         struct i40e_vsi *vsi = np->vsi;
3930         struct i40e_pf *pf = vsi->back;
3931         char int_name[IFNAMSIZ];
3932         int err;
3933
3934         /* disallow open during test */
3935         if (test_bit(__I40E_TESTING, &pf->state))
3936                 return -EBUSY;
3937
3938         netif_carrier_off(netdev);
3939
3940         /* allocate descriptors */
3941         err = i40e_vsi_setup_tx_resources(vsi);
3942         if (err)
3943                 goto err_setup_tx;
3944         err = i40e_vsi_setup_rx_resources(vsi);
3945         if (err)
3946                 goto err_setup_rx;
3947
3948         err = i40e_vsi_configure(vsi);
3949         if (err)
3950                 goto err_setup_rx;
3951
3952         snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
3953                  dev_driver_string(&pf->pdev->dev), netdev->name);
3954         err = i40e_vsi_request_irq(vsi, int_name);
3955         if (err)
3956                 goto err_setup_rx;
3957
3958         err = i40e_up_complete(vsi);
3959         if (err)
3960                 goto err_up_complete;
3961
3962         if ((vsi->type == I40E_VSI_MAIN) || (vsi->type == I40E_VSI_VMDQ2)) {
3963                 err = i40e_aq_set_vsi_broadcast(&pf->hw, vsi->seid, true, NULL);
3964                 if (err)
3965                         netdev_info(netdev,
3966                                     "couldn't set broadcast err %d aq_err %d\n",
3967                                     err, pf->hw.aq.asq_last_status);
3968         }
3969
3970         return 0;
3971
3972 err_up_complete:
3973         i40e_down(vsi);
3974         i40e_vsi_free_irq(vsi);
3975 err_setup_rx:
3976         i40e_vsi_free_rx_resources(vsi);
3977 err_setup_tx:
3978         i40e_vsi_free_tx_resources(vsi);
3979         if (vsi == pf->vsi[pf->lan_vsi])
3980                 i40e_do_reset(pf, (1 << __I40E_PF_RESET_REQUESTED));
3981
3982         return err;
3983 }
3984
3985 /**
3986  * i40e_close - Disables a network interface
3987  * @netdev: network interface device structure
3988  *
3989  * The close entry point is called when an interface is de-activated
3990  * by the OS.  The hardware is still under the driver's control, but
3991  * this netdev interface is disabled.
3992  *
3993  * Returns 0, this is not allowed to fail
3994  **/
3995 static int i40e_close(struct net_device *netdev)
3996 {
3997         struct i40e_netdev_priv *np = netdev_priv(netdev);
3998         struct i40e_vsi *vsi = np->vsi;
3999
4000         if (test_and_set_bit(__I40E_DOWN, &vsi->state))
4001                 return 0;
4002
4003         i40e_down(vsi);
4004         i40e_vsi_free_irq(vsi);
4005
4006         i40e_vsi_free_tx_resources(vsi);
4007         i40e_vsi_free_rx_resources(vsi);
4008
4009         return 0;
4010 }
4011
4012 /**
4013  * i40e_do_reset - Start a PF or Core Reset sequence
4014  * @pf: board private structure
4015  * @reset_flags: which reset is requested
4016  *
4017  * The essential difference in resets is that the PF Reset
4018  * doesn't clear the packet buffers, doesn't reset the PE
4019  * firmware, and doesn't bother the other PFs on the chip.
4020  **/
4021 void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags)
4022 {
4023         u32 val;
4024
4025         WARN_ON(in_interrupt());
4026
4027         /* do the biggest reset indicated */
4028         if (reset_flags & (1 << __I40E_GLOBAL_RESET_REQUESTED)) {
4029
4030                 /* Request a Global Reset
4031                  *
4032                  * This will start the chip's countdown to the actual full
4033                  * chip reset event, and a warning interrupt to be sent
4034                  * to all PFs, including the requestor.  Our handler
4035                  * for the warning interrupt will deal with the shutdown
4036                  * and recovery of the switch setup.
4037                  */
4038                 dev_info(&pf->pdev->dev, "GlobalR requested\n");
4039                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4040                 val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
4041                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4042
4043         } else if (reset_flags & (1 << __I40E_CORE_RESET_REQUESTED)) {
4044
4045                 /* Request a Core Reset
4046                  *
4047                  * Same as Global Reset, except does *not* include the MAC/PHY
4048                  */
4049                 dev_info(&pf->pdev->dev, "CoreR requested\n");
4050                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4051                 val |= I40E_GLGEN_RTRIG_CORER_MASK;
4052                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4053                 i40e_flush(&pf->hw);
4054
4055         } else if (reset_flags & (1 << __I40E_PF_RESET_REQUESTED)) {
4056
4057                 /* Request a PF Reset
4058                  *
4059                  * Resets only the PF-specific registers
4060                  *
4061                  * This goes directly to the tear-down and rebuild of
4062                  * the switch, since we need to do all the recovery as
4063                  * for the Core Reset.
4064                  */
4065                 dev_info(&pf->pdev->dev, "PFR requested\n");
4066                 i40e_handle_reset_warning(pf);
4067
4068         } else if (reset_flags & (1 << __I40E_REINIT_REQUESTED)) {
4069                 int v;
4070
4071                 /* Find the VSI(s) that requested a re-init */
4072                 dev_info(&pf->pdev->dev,
4073                          "VSI reinit requested\n");
4074                 for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4075                         struct i40e_vsi *vsi = pf->vsi[v];
4076                         if (vsi != NULL &&
4077                             test_bit(__I40E_REINIT_REQUESTED, &vsi->state)) {
4078                                 i40e_vsi_reinit_locked(pf->vsi[v]);
4079                                 clear_bit(__I40E_REINIT_REQUESTED, &vsi->state);
4080                         }
4081                 }
4082
4083                 /* no further action needed, so return now */
4084                 return;
4085         } else {
4086                 dev_info(&pf->pdev->dev,
4087                          "bad reset request 0x%08x\n", reset_flags);
4088                 return;
4089         }
4090 }
4091
4092 /**
4093  * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
4094  * @pf: board private structure
4095  * @e: event info posted on ARQ
4096  *
4097  * Handler for LAN Queue Overflow Event generated by the firmware for PF
4098  * and VF queues
4099  **/
4100 static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
4101                                            struct i40e_arq_event_info *e)
4102 {
4103         struct i40e_aqc_lan_overflow *data =
4104                 (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
4105         u32 queue = le32_to_cpu(data->prtdcb_rupto);
4106         u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
4107         struct i40e_hw *hw = &pf->hw;
4108         struct i40e_vf *vf;
4109         u16 vf_id;
4110
4111         dev_info(&pf->pdev->dev, "%s: Rx Queue Number = %d QTX_CTL=0x%08x\n",
4112                  __func__, queue, qtx_ctl);
4113
4114         /* Queue belongs to VF, find the VF and issue VF reset */
4115         if (((qtx_ctl & I40E_QTX_CTL_PFVF_Q_MASK)
4116             >> I40E_QTX_CTL_PFVF_Q_SHIFT) == I40E_QTX_CTL_VF_QUEUE) {
4117                 vf_id = (u16)((qtx_ctl & I40E_QTX_CTL_VFVM_INDX_MASK)
4118                          >> I40E_QTX_CTL_VFVM_INDX_SHIFT);
4119                 vf_id -= hw->func_caps.vf_base_id;
4120                 vf = &pf->vf[vf_id];
4121                 i40e_vc_notify_vf_reset(vf);
4122                 /* Allow VF to process pending reset notification */
4123                 msleep(20);
4124                 i40e_reset_vf(vf, false);
4125         }
4126 }
4127
4128 /**
4129  * i40e_service_event_complete - Finish up the service event
4130  * @pf: board private structure
4131  **/
4132 static void i40e_service_event_complete(struct i40e_pf *pf)
4133 {
4134         BUG_ON(!test_bit(__I40E_SERVICE_SCHED, &pf->state));
4135
4136         /* flush memory to make sure state is correct before next watchog */
4137         smp_mb__before_clear_bit();
4138         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
4139 }
4140
4141 /**
4142  * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
4143  * @pf: board private structure
4144  **/
4145 static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
4146 {
4147         if (!(pf->flags & I40E_FLAG_FDIR_REQUIRES_REINIT))
4148                 return;
4149
4150         pf->flags &= ~I40E_FLAG_FDIR_REQUIRES_REINIT;
4151
4152         /* if interface is down do nothing */
4153         if (test_bit(__I40E_DOWN, &pf->state))
4154                 return;
4155 }
4156
4157 /**
4158  * i40e_vsi_link_event - notify VSI of a link event
4159  * @vsi: vsi to be notified
4160  * @link_up: link up or down
4161  **/
4162 static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
4163 {
4164         if (!vsi)
4165                 return;
4166
4167         switch (vsi->type) {
4168         case I40E_VSI_MAIN:
4169                 if (!vsi->netdev || !vsi->netdev_registered)
4170                         break;
4171
4172                 if (link_up) {
4173                         netif_carrier_on(vsi->netdev);
4174                         netif_tx_wake_all_queues(vsi->netdev);
4175                 } else {
4176                         netif_carrier_off(vsi->netdev);
4177                         netif_tx_stop_all_queues(vsi->netdev);
4178                 }
4179                 break;
4180
4181         case I40E_VSI_SRIOV:
4182                 break;
4183
4184         case I40E_VSI_VMDQ2:
4185         case I40E_VSI_CTRL:
4186         case I40E_VSI_MIRROR:
4187         default:
4188                 /* there is no notification for other VSIs */
4189                 break;
4190         }
4191 }
4192
4193 /**
4194  * i40e_veb_link_event - notify elements on the veb of a link event
4195  * @veb: veb to be notified
4196  * @link_up: link up or down
4197  **/
4198 static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
4199 {
4200         struct i40e_pf *pf;
4201         int i;
4202
4203         if (!veb || !veb->pf)
4204                 return;
4205         pf = veb->pf;
4206
4207         /* depth first... */
4208         for (i = 0; i < I40E_MAX_VEB; i++)
4209                 if (pf->veb[i] && (pf->veb[i]->uplink_seid == veb->seid))
4210                         i40e_veb_link_event(pf->veb[i], link_up);
4211
4212         /* ... now the local VSIs */
4213         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4214                 if (pf->vsi[i] && (pf->vsi[i]->uplink_seid == veb->seid))
4215                         i40e_vsi_link_event(pf->vsi[i], link_up);
4216 }
4217
4218 /**
4219  * i40e_link_event - Update netif_carrier status
4220  * @pf: board private structure
4221  **/
4222 static void i40e_link_event(struct i40e_pf *pf)
4223 {
4224         bool new_link, old_link;
4225
4226         new_link = (pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP);
4227         old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);
4228
4229         if (new_link == old_link)
4230                 return;
4231
4232         if (!test_bit(__I40E_DOWN, &pf->vsi[pf->lan_vsi]->state))
4233                 netdev_info(pf->vsi[pf->lan_vsi]->netdev,
4234                             "NIC Link is %s\n", (new_link ? "Up" : "Down"));
4235
4236         /* Notify the base of the switch tree connected to
4237          * the link.  Floating VEBs are not notified.
4238          */
4239         if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
4240                 i40e_veb_link_event(pf->veb[pf->lan_veb], new_link);
4241         else
4242                 i40e_vsi_link_event(pf->vsi[pf->lan_vsi], new_link);
4243
4244         if (pf->vf)
4245                 i40e_vc_notify_link_state(pf);
4246 }
4247
4248 /**
4249  * i40e_check_hang_subtask - Check for hung queues and dropped interrupts
4250  * @pf: board private structure
4251  *
4252  * Set the per-queue flags to request a check for stuck queues in the irq
4253  * clean functions, then force interrupts to be sure the irq clean is called.
4254  **/
4255 static void i40e_check_hang_subtask(struct i40e_pf *pf)
4256 {
4257         int i, v;
4258
4259         /* If we're down or resetting, just bail */
4260         if (test_bit(__I40E_CONFIG_BUSY, &pf->state))
4261                 return;
4262
4263         /* for each VSI/netdev
4264          *     for each Tx queue
4265          *         set the check flag
4266          *     for each q_vector
4267          *         force an interrupt
4268          */
4269         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4270                 struct i40e_vsi *vsi = pf->vsi[v];
4271                 int armed = 0;
4272
4273                 if (!pf->vsi[v] ||
4274                     test_bit(__I40E_DOWN, &vsi->state) ||
4275                     (vsi->netdev && !netif_carrier_ok(vsi->netdev)))
4276                         continue;
4277
4278                 for (i = 0; i < vsi->num_queue_pairs; i++) {
4279                         set_check_for_tx_hang(vsi->tx_rings[i]);
4280                         if (test_bit(__I40E_HANG_CHECK_ARMED,
4281                                      &vsi->tx_rings[i]->state))
4282                                 armed++;
4283                 }
4284
4285                 if (armed) {
4286                         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
4287                                 wr32(&vsi->back->hw, I40E_PFINT_DYN_CTL0,
4288                                      (I40E_PFINT_DYN_CTL0_INTENA_MASK |
4289                                       I40E_PFINT_DYN_CTL0_SWINT_TRIG_MASK));
4290                         } else {
4291                                 u16 vec = vsi->base_vector - 1;
4292                                 u32 val = (I40E_PFINT_DYN_CTLN_INTENA_MASK |
4293                                            I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK);
4294                                 for (i = 0; i < vsi->num_q_vectors; i++, vec++)
4295                                         wr32(&vsi->back->hw,
4296                                              I40E_PFINT_DYN_CTLN(vec), val);
4297                         }
4298                         i40e_flush(&vsi->back->hw);
4299                 }
4300         }
4301 }
4302
4303 /**
4304  * i40e_watchdog_subtask - Check and bring link up
4305  * @pf: board private structure
4306  **/
4307 static void i40e_watchdog_subtask(struct i40e_pf *pf)
4308 {
4309         int i;
4310
4311         /* if interface is down do nothing */
4312         if (test_bit(__I40E_DOWN, &pf->state) ||
4313             test_bit(__I40E_CONFIG_BUSY, &pf->state))
4314                 return;
4315
4316         /* Update the stats for active netdevs so the network stack
4317          * can look at updated numbers whenever it cares to
4318          */
4319         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4320                 if (pf->vsi[i] && pf->vsi[i]->netdev)
4321                         i40e_update_stats(pf->vsi[i]);
4322
4323         /* Update the stats for the active switching components */
4324         for (i = 0; i < I40E_MAX_VEB; i++)
4325                 if (pf->veb[i])
4326                         i40e_update_veb_stats(pf->veb[i]);
4327 }
4328
4329 /**
4330  * i40e_reset_subtask - Set up for resetting the device and driver
4331  * @pf: board private structure
4332  **/
4333 static void i40e_reset_subtask(struct i40e_pf *pf)
4334 {
4335         u32 reset_flags = 0;
4336
4337         if (test_bit(__I40E_REINIT_REQUESTED, &pf->state)) {
4338                 reset_flags |= (1 << __I40E_REINIT_REQUESTED);
4339                 clear_bit(__I40E_REINIT_REQUESTED, &pf->state);
4340         }
4341         if (test_bit(__I40E_PF_RESET_REQUESTED, &pf->state)) {
4342                 reset_flags |= (1 << __I40E_PF_RESET_REQUESTED);
4343                 clear_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
4344         }
4345         if (test_bit(__I40E_CORE_RESET_REQUESTED, &pf->state)) {
4346                 reset_flags |= (1 << __I40E_CORE_RESET_REQUESTED);
4347                 clear_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
4348         }
4349         if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state)) {
4350                 reset_flags |= (1 << __I40E_GLOBAL_RESET_REQUESTED);
4351                 clear_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
4352         }
4353
4354         /* If there's a recovery already waiting, it takes
4355          * precedence before starting a new reset sequence.
4356          */
4357         if (test_bit(__I40E_RESET_INTR_RECEIVED, &pf->state)) {
4358                 i40e_handle_reset_warning(pf);
4359                 return;
4360         }
4361
4362         /* If we're already down or resetting, just bail */
4363         if (reset_flags &&
4364             !test_bit(__I40E_DOWN, &pf->state) &&
4365             !test_bit(__I40E_CONFIG_BUSY, &pf->state))
4366                 i40e_do_reset(pf, reset_flags);
4367 }
4368
4369 /**
4370  * i40e_handle_link_event - Handle link event
4371  * @pf: board private structure
4372  * @e: event info posted on ARQ
4373  **/
4374 static void i40e_handle_link_event(struct i40e_pf *pf,
4375                                    struct i40e_arq_event_info *e)
4376 {
4377         struct i40e_hw *hw = &pf->hw;
4378         struct i40e_aqc_get_link_status *status =
4379                 (struct i40e_aqc_get_link_status *)&e->desc.params.raw;
4380         struct i40e_link_status *hw_link_info = &hw->phy.link_info;
4381
4382         /* save off old link status information */
4383         memcpy(&pf->hw.phy.link_info_old, hw_link_info,
4384                sizeof(pf->hw.phy.link_info_old));
4385
4386         /* update link status */
4387         hw_link_info->phy_type = (enum i40e_aq_phy_type)status->phy_type;
4388         hw_link_info->link_speed = (enum i40e_aq_link_speed)status->link_speed;
4389         hw_link_info->link_info = status->link_info;
4390         hw_link_info->an_info = status->an_info;
4391         hw_link_info->ext_info = status->ext_info;
4392         hw_link_info->lse_enable =
4393                 le16_to_cpu(status->command_flags) &
4394                             I40E_AQ_LSE_ENABLE;
4395
4396         /* process the event */
4397         i40e_link_event(pf);
4398
4399         /* Do a new status request to re-enable LSE reporting
4400          * and load new status information into the hw struct,
4401          * then see if the status changed while processing the
4402          * initial event.
4403          */
4404         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
4405         i40e_link_event(pf);
4406 }
4407
4408 /**
4409  * i40e_clean_adminq_subtask - Clean the AdminQ rings
4410  * @pf: board private structure
4411  **/
4412 static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
4413 {
4414         struct i40e_arq_event_info event;
4415         struct i40e_hw *hw = &pf->hw;
4416         u16 pending, i = 0;
4417         i40e_status ret;
4418         u16 opcode;
4419         u32 val;
4420
4421         if (!test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state))
4422                 return;
4423
4424         event.msg_size = I40E_MAX_AQ_BUF_SIZE;
4425         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
4426         if (!event.msg_buf)
4427                 return;
4428
4429         do {
4430                 ret = i40e_clean_arq_element(hw, &event, &pending);
4431                 if (ret == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
4432                         dev_info(&pf->pdev->dev, "No ARQ event found\n");
4433                         break;
4434                 } else if (ret) {
4435                         dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
4436                         break;
4437                 }
4438
4439                 opcode = le16_to_cpu(event.desc.opcode);
4440                 switch (opcode) {
4441
4442                 case i40e_aqc_opc_get_link_status:
4443                         i40e_handle_link_event(pf, &event);
4444                         break;
4445                 case i40e_aqc_opc_send_msg_to_pf:
4446                         ret = i40e_vc_process_vf_msg(pf,
4447                                         le16_to_cpu(event.desc.retval),
4448                                         le32_to_cpu(event.desc.cookie_high),
4449                                         le32_to_cpu(event.desc.cookie_low),
4450                                         event.msg_buf,
4451                                         event.msg_size);
4452                         break;
4453                 case i40e_aqc_opc_lldp_update_mib:
4454                         dev_info(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
4455                         break;
4456                 case i40e_aqc_opc_event_lan_overflow:
4457                         dev_info(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
4458                         i40e_handle_lan_overflow_event(pf, &event);
4459                         break;
4460                 default:
4461                         dev_info(&pf->pdev->dev,
4462                                  "ARQ Error: Unknown event %d received\n",
4463                                  event.desc.opcode);
4464                         break;
4465                 }
4466         } while (pending && (i++ < pf->adminq_work_limit));
4467
4468         clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
4469         /* re-enable Admin queue interrupt cause */
4470         val = rd32(hw, I40E_PFINT_ICR0_ENA);
4471         val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
4472         wr32(hw, I40E_PFINT_ICR0_ENA, val);
4473         i40e_flush(hw);
4474
4475         kfree(event.msg_buf);
4476 }
4477
4478 /**
4479  * i40e_reconstitute_veb - rebuild the VEB and anything connected to it
4480  * @veb: pointer to the VEB instance
4481  *
4482  * This is a recursive function that first builds the attached VSIs then
4483  * recurses in to build the next layer of VEB.  We track the connections
4484  * through our own index numbers because the seid's from the HW could
4485  * change across the reset.
4486  **/
4487 static int i40e_reconstitute_veb(struct i40e_veb *veb)
4488 {
4489         struct i40e_vsi *ctl_vsi = NULL;
4490         struct i40e_pf *pf = veb->pf;
4491         int v, veb_idx;
4492         int ret;
4493
4494         /* build VSI that owns this VEB, temporarily attached to base VEB */
4495         for (v = 0; v < pf->hw.func_caps.num_vsis && !ctl_vsi; v++) {
4496                 if (pf->vsi[v] &&
4497                     pf->vsi[v]->veb_idx == veb->idx &&
4498                     pf->vsi[v]->flags & I40E_VSI_FLAG_VEB_OWNER) {
4499                         ctl_vsi = pf->vsi[v];
4500                         break;
4501                 }
4502         }
4503         if (!ctl_vsi) {
4504                 dev_info(&pf->pdev->dev,
4505                          "missing owner VSI for veb_idx %d\n", veb->idx);
4506                 ret = -ENOENT;
4507                 goto end_reconstitute;
4508         }
4509         if (ctl_vsi != pf->vsi[pf->lan_vsi])
4510                 ctl_vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
4511         ret = i40e_add_vsi(ctl_vsi);
4512         if (ret) {
4513                 dev_info(&pf->pdev->dev,
4514                          "rebuild of owner VSI failed: %d\n", ret);
4515                 goto end_reconstitute;
4516         }
4517         i40e_vsi_reset_stats(ctl_vsi);
4518
4519         /* create the VEB in the switch and move the VSI onto the VEB */
4520         ret = i40e_add_veb(veb, ctl_vsi);
4521         if (ret)
4522                 goto end_reconstitute;
4523
4524         /* create the remaining VSIs attached to this VEB */
4525         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4526                 if (!pf->vsi[v] || pf->vsi[v] == ctl_vsi)
4527                         continue;
4528
4529                 if (pf->vsi[v]->veb_idx == veb->idx) {
4530                         struct i40e_vsi *vsi = pf->vsi[v];
4531                         vsi->uplink_seid = veb->seid;
4532                         ret = i40e_add_vsi(vsi);
4533                         if (ret) {
4534                                 dev_info(&pf->pdev->dev,
4535                                          "rebuild of vsi_idx %d failed: %d\n",
4536                                          v, ret);
4537                                 goto end_reconstitute;
4538                         }
4539                         i40e_vsi_reset_stats(vsi);
4540                 }
4541         }
4542
4543         /* create any VEBs attached to this VEB - RECURSION */
4544         for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
4545                 if (pf->veb[veb_idx] && pf->veb[veb_idx]->veb_idx == veb->idx) {
4546                         pf->veb[veb_idx]->uplink_seid = veb->seid;
4547                         ret = i40e_reconstitute_veb(pf->veb[veb_idx]);
4548                         if (ret)
4549                                 break;
4550                 }
4551         }
4552
4553 end_reconstitute:
4554         return ret;
4555 }
4556
4557 /**
4558  * i40e_get_capabilities - get info about the HW
4559  * @pf: the PF struct
4560  **/
4561 static int i40e_get_capabilities(struct i40e_pf *pf)
4562 {
4563         struct i40e_aqc_list_capabilities_element_resp *cap_buf;
4564         u16 data_size;
4565         int buf_len;
4566         int err;
4567
4568         buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
4569         do {
4570                 cap_buf = kzalloc(buf_len, GFP_KERNEL);
4571                 if (!cap_buf)
4572                         return -ENOMEM;
4573
4574                 /* this loads the data into the hw struct for us */
4575                 err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
4576                                             &data_size,
4577                                             i40e_aqc_opc_list_func_capabilities,
4578                                             NULL);
4579                 /* data loaded, buffer no longer needed */
4580                 kfree(cap_buf);
4581
4582                 if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
4583                         /* retry with a larger buffer */
4584                         buf_len = data_size;
4585                 } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK) {
4586                         dev_info(&pf->pdev->dev,
4587                                  "capability discovery failed: aq=%d\n",
4588                                  pf->hw.aq.asq_last_status);
4589                         return -ENODEV;
4590                 }
4591         } while (err);
4592
4593         if (pf->hw.debug_mask & I40E_DEBUG_USER)
4594                 dev_info(&pf->pdev->dev,
4595                          "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",
4596                          pf->hw.pf_id, pf->hw.func_caps.num_vfs,
4597                          pf->hw.func_caps.num_msix_vectors,
4598                          pf->hw.func_caps.num_msix_vectors_vf,
4599                          pf->hw.func_caps.fd_filters_guaranteed,
4600                          pf->hw.func_caps.fd_filters_best_effort,
4601                          pf->hw.func_caps.num_tx_qp,
4602                          pf->hw.func_caps.num_vsis);
4603
4604         return 0;
4605 }
4606
4607 /**
4608  * i40e_fdir_setup - initialize the Flow Director resources
4609  * @pf: board private structure
4610  **/
4611 static void i40e_fdir_setup(struct i40e_pf *pf)
4612 {
4613         struct i40e_vsi *vsi;
4614         bool new_vsi = false;
4615         int err, i;
4616
4617         if (!(pf->flags & (I40E_FLAG_FDIR_ENABLED|I40E_FLAG_FDIR_ATR_ENABLED)))
4618                 return;
4619
4620         pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
4621
4622         /* find existing or make new FDIR VSI */
4623         vsi = NULL;
4624         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4625                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR)
4626                         vsi = pf->vsi[i];
4627         if (!vsi) {
4628                 vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR, pf->mac_seid, 0);
4629                 if (!vsi) {
4630                         dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
4631                         pf->flags &= ~I40E_FLAG_FDIR_ENABLED;
4632                         return;
4633                 }
4634                 new_vsi = true;
4635         }
4636         WARN_ON(vsi->base_queue != I40E_FDIR_RING);
4637         i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_rings);
4638
4639         err = i40e_vsi_setup_tx_resources(vsi);
4640         if (!err)
4641                 err = i40e_vsi_setup_rx_resources(vsi);
4642         if (!err)
4643                 err = i40e_vsi_configure(vsi);
4644         if (!err && new_vsi) {
4645                 char int_name[IFNAMSIZ + 9];
4646                 snprintf(int_name, sizeof(int_name) - 1, "%s-fdir",
4647                          dev_driver_string(&pf->pdev->dev));
4648                 err = i40e_vsi_request_irq(vsi, int_name);
4649         }
4650         if (!err)
4651                 err = i40e_up_complete(vsi);
4652
4653         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
4654 }
4655
4656 /**
4657  * i40e_fdir_teardown - release the Flow Director resources
4658  * @pf: board private structure
4659  **/
4660 static void i40e_fdir_teardown(struct i40e_pf *pf)
4661 {
4662         int i;
4663
4664         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
4665                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
4666                         i40e_vsi_release(pf->vsi[i]);
4667                         break;
4668                 }
4669         }
4670 }
4671
4672 /**
4673  * i40e_handle_reset_warning - prep for the core to reset
4674  * @pf: board private structure
4675  *
4676  * Close up the VFs and other things in prep for a Core Reset,
4677  * then get ready to rebuild the world.
4678  **/
4679 static void i40e_handle_reset_warning(struct i40e_pf *pf)
4680 {
4681         struct i40e_driver_version dv;
4682         struct i40e_hw *hw = &pf->hw;
4683         i40e_status ret;
4684         u32 v;
4685
4686         clear_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
4687         if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
4688                 return;
4689
4690         dev_info(&pf->pdev->dev, "Tearing down internal switch for reset\n");
4691
4692         i40e_vc_notify_reset(pf);
4693
4694         /* quiesce the VSIs and their queues that are not already DOWN */
4695         i40e_pf_quiesce_all_vsi(pf);
4696
4697         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4698                 if (pf->vsi[v])
4699                         pf->vsi[v]->seid = 0;
4700         }
4701
4702         i40e_shutdown_adminq(&pf->hw);
4703
4704         /* Now we wait for GRST to settle out.
4705          * We don't have to delete the VEBs or VSIs from the hw switch
4706          * because the reset will make them disappear.
4707          */
4708         ret = i40e_pf_reset(hw);
4709         if (ret)
4710                 dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
4711         pf->pfr_count++;
4712
4713         if (test_bit(__I40E_DOWN, &pf->state))
4714                 goto end_core_reset;
4715         dev_info(&pf->pdev->dev, "Rebuilding internal switch\n");
4716
4717         /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
4718         ret = i40e_init_adminq(&pf->hw);
4719         if (ret) {
4720                 dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, %d\n", ret);
4721                 goto end_core_reset;
4722         }
4723
4724         ret = i40e_get_capabilities(pf);
4725         if (ret) {
4726                 dev_info(&pf->pdev->dev, "i40e_get_capabilities failed, %d\n",
4727                          ret);
4728                 goto end_core_reset;
4729         }
4730
4731         /* call shutdown HMC */
4732         ret = i40e_shutdown_lan_hmc(hw);
4733         if (ret) {
4734                 dev_info(&pf->pdev->dev, "shutdown_lan_hmc failed: %d\n", ret);
4735                 goto end_core_reset;
4736         }
4737
4738         ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
4739                                 hw->func_caps.num_rx_qp,
4740                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
4741         if (ret) {
4742                 dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
4743                 goto end_core_reset;
4744         }
4745         ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
4746         if (ret) {
4747                 dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
4748                 goto end_core_reset;
4749         }
4750
4751         /* do basic switch setup */
4752         ret = i40e_setup_pf_switch(pf);
4753         if (ret)
4754                 goto end_core_reset;
4755
4756         /* Rebuild the VSIs and VEBs that existed before reset.
4757          * They are still in our local switch element arrays, so only
4758          * need to rebuild the switch model in the HW.
4759          *
4760          * If there were VEBs but the reconstitution failed, we'll try
4761          * try to recover minimal use by getting the basic PF VSI working.
4762          */
4763         if (pf->vsi[pf->lan_vsi]->uplink_seid != pf->mac_seid) {
4764                 dev_info(&pf->pdev->dev, "attempting to rebuild switch\n");
4765                 /* find the one VEB connected to the MAC, and find orphans */
4766                 for (v = 0; v < I40E_MAX_VEB; v++) {
4767                         if (!pf->veb[v])
4768                                 continue;
4769
4770                         if (pf->veb[v]->uplink_seid == pf->mac_seid ||
4771                             pf->veb[v]->uplink_seid == 0) {
4772                                 ret = i40e_reconstitute_veb(pf->veb[v]);
4773
4774                                 if (!ret)
4775                                         continue;
4776
4777                                 /* If Main VEB failed, we're in deep doodoo,
4778                                  * so give up rebuilding the switch and set up
4779                                  * for minimal rebuild of PF VSI.
4780                                  * If orphan failed, we'll report the error
4781                                  * but try to keep going.
4782                                  */
4783                                 if (pf->veb[v]->uplink_seid == pf->mac_seid) {
4784                                         dev_info(&pf->pdev->dev,
4785                                                  "rebuild of switch failed: %d, will try to set up simple PF connection\n",
4786                                                  ret);
4787                                         pf->vsi[pf->lan_vsi]->uplink_seid
4788                                                                 = pf->mac_seid;
4789                                         break;
4790                                 } else if (pf->veb[v]->uplink_seid == 0) {
4791                                         dev_info(&pf->pdev->dev,
4792                                                  "rebuild of orphan VEB failed: %d\n",
4793                                                  ret);
4794                                 }
4795                         }
4796                 }
4797         }
4798
4799         if (pf->vsi[pf->lan_vsi]->uplink_seid == pf->mac_seid) {
4800                 dev_info(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
4801                 /* no VEB, so rebuild only the Main VSI */
4802                 ret = i40e_add_vsi(pf->vsi[pf->lan_vsi]);
4803                 if (ret) {
4804                         dev_info(&pf->pdev->dev,
4805                                  "rebuild of Main VSI failed: %d\n", ret);
4806                         goto end_core_reset;
4807                 }
4808         }
4809
4810         /* reinit the misc interrupt */
4811         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
4812                 ret = i40e_setup_misc_vector(pf);
4813
4814         /* restart the VSIs that were rebuilt and running before the reset */
4815         i40e_pf_unquiesce_all_vsi(pf);
4816
4817         /* tell the firmware that we're starting */
4818         dv.major_version = DRV_VERSION_MAJOR;
4819         dv.minor_version = DRV_VERSION_MINOR;
4820         dv.build_version = DRV_VERSION_BUILD;
4821         dv.subbuild_version = 0;
4822         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
4823
4824         dev_info(&pf->pdev->dev, "PF reset done\n");
4825
4826 end_core_reset:
4827         clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
4828 }
4829
4830 /**
4831  * i40e_handle_mdd_event
4832  * @pf: pointer to the pf structure
4833  *
4834  * Called from the MDD irq handler to identify possibly malicious vfs
4835  **/
4836 static void i40e_handle_mdd_event(struct i40e_pf *pf)
4837 {
4838         struct i40e_hw *hw = &pf->hw;
4839         bool mdd_detected = false;
4840         struct i40e_vf *vf;
4841         u32 reg;
4842         int i;
4843
4844         if (!test_bit(__I40E_MDD_EVENT_PENDING, &pf->state))
4845                 return;
4846
4847         /* find what triggered the MDD event */
4848         reg = rd32(hw, I40E_GL_MDET_TX);
4849         if (reg & I40E_GL_MDET_TX_VALID_MASK) {
4850                 u8 func = (reg & I40E_GL_MDET_TX_FUNCTION_MASK)
4851                                 >> I40E_GL_MDET_TX_FUNCTION_SHIFT;
4852                 u8 event = (reg & I40E_GL_MDET_TX_EVENT_SHIFT)
4853                                 >> I40E_GL_MDET_TX_EVENT_SHIFT;
4854                 u8 queue = (reg & I40E_GL_MDET_TX_QUEUE_MASK)
4855                                 >> I40E_GL_MDET_TX_QUEUE_SHIFT;
4856                 dev_info(&pf->pdev->dev,
4857                          "Malicious Driver Detection TX event 0x%02x on q %d of function 0x%02x\n",
4858                          event, queue, func);
4859                 wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
4860                 mdd_detected = true;
4861         }
4862         reg = rd32(hw, I40E_GL_MDET_RX);
4863         if (reg & I40E_GL_MDET_RX_VALID_MASK) {
4864                 u8 func = (reg & I40E_GL_MDET_RX_FUNCTION_MASK)
4865                                 >> I40E_GL_MDET_RX_FUNCTION_SHIFT;
4866                 u8 event = (reg & I40E_GL_MDET_RX_EVENT_SHIFT)
4867                                 >> I40E_GL_MDET_RX_EVENT_SHIFT;
4868                 u8 queue = (reg & I40E_GL_MDET_RX_QUEUE_MASK)
4869                                 >> I40E_GL_MDET_RX_QUEUE_SHIFT;
4870                 dev_info(&pf->pdev->dev,
4871                          "Malicious Driver Detection RX event 0x%02x on q %d of function 0x%02x\n",
4872                          event, queue, func);
4873                 wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
4874                 mdd_detected = true;
4875         }
4876
4877         /* see if one of the VFs needs its hand slapped */
4878         for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
4879                 vf = &(pf->vf[i]);
4880                 reg = rd32(hw, I40E_VP_MDET_TX(i));
4881                 if (reg & I40E_VP_MDET_TX_VALID_MASK) {
4882                         wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
4883                         vf->num_mdd_events++;
4884                         dev_info(&pf->pdev->dev, "MDD TX event on VF %d\n", i);
4885                 }
4886
4887                 reg = rd32(hw, I40E_VP_MDET_RX(i));
4888                 if (reg & I40E_VP_MDET_RX_VALID_MASK) {
4889                         wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
4890                         vf->num_mdd_events++;
4891                         dev_info(&pf->pdev->dev, "MDD RX event on VF %d\n", i);
4892                 }
4893
4894                 if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
4895                         dev_info(&pf->pdev->dev,
4896                                  "Too many MDD events on VF %d, disabled\n", i);
4897                         dev_info(&pf->pdev->dev,
4898                                  "Use PF Control I/F to re-enable the VF\n");
4899                         set_bit(I40E_VF_STAT_DISABLED, &vf->vf_states);
4900                 }
4901         }
4902
4903         /* re-enable mdd interrupt cause */
4904         clear_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
4905         reg = rd32(hw, I40E_PFINT_ICR0_ENA);
4906         reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
4907         wr32(hw, I40E_PFINT_ICR0_ENA, reg);
4908         i40e_flush(hw);
4909 }
4910
4911 /**
4912  * i40e_service_task - Run the driver's async subtasks
4913  * @work: pointer to work_struct containing our data
4914  **/
4915 static void i40e_service_task(struct work_struct *work)
4916 {
4917         struct i40e_pf *pf = container_of(work,
4918                                           struct i40e_pf,
4919                                           service_task);
4920         unsigned long start_time = jiffies;
4921
4922         i40e_reset_subtask(pf);
4923         i40e_handle_mdd_event(pf);
4924         i40e_vc_process_vflr_event(pf);
4925         i40e_watchdog_subtask(pf);
4926         i40e_fdir_reinit_subtask(pf);
4927         i40e_check_hang_subtask(pf);
4928         i40e_sync_filters_subtask(pf);
4929         i40e_clean_adminq_subtask(pf);
4930
4931         i40e_service_event_complete(pf);
4932
4933         /* If the tasks have taken longer than one timer cycle or there
4934          * is more work to be done, reschedule the service task now
4935          * rather than wait for the timer to tick again.
4936          */
4937         if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
4938             test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state)            ||
4939             test_bit(__I40E_MDD_EVENT_PENDING, &pf->state)               ||
4940             test_bit(__I40E_VFLR_EVENT_PENDING, &pf->state))
4941                 i40e_service_event_schedule(pf);
4942 }
4943
4944 /**
4945  * i40e_service_timer - timer callback
4946  * @data: pointer to PF struct
4947  **/
4948 static void i40e_service_timer(unsigned long data)
4949 {
4950         struct i40e_pf *pf = (struct i40e_pf *)data;
4951
4952         mod_timer(&pf->service_timer,
4953                   round_jiffies(jiffies + pf->service_timer_period));
4954         i40e_service_event_schedule(pf);
4955 }
4956
4957 /**
4958  * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
4959  * @vsi: the VSI being configured
4960  **/
4961 static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
4962 {
4963         struct i40e_pf *pf = vsi->back;
4964
4965         switch (vsi->type) {
4966         case I40E_VSI_MAIN:
4967                 vsi->alloc_queue_pairs = pf->num_lan_qps;
4968                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
4969                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
4970                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
4971                         vsi->num_q_vectors = pf->num_lan_msix;
4972                 else
4973                         vsi->num_q_vectors = 1;
4974
4975                 break;
4976
4977         case I40E_VSI_FDIR:
4978                 vsi->alloc_queue_pairs = 1;
4979                 vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
4980                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
4981                 vsi->num_q_vectors = 1;
4982                 break;
4983
4984         case I40E_VSI_VMDQ2:
4985                 vsi->alloc_queue_pairs = pf->num_vmdq_qps;
4986                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
4987                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
4988                 vsi->num_q_vectors = pf->num_vmdq_msix;
4989                 break;
4990
4991         case I40E_VSI_SRIOV:
4992                 vsi->alloc_queue_pairs = pf->num_vf_qps;
4993                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
4994                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
4995                 break;
4996
4997         default:
4998                 WARN_ON(1);
4999                 return -ENODATA;
5000         }
5001
5002         return 0;
5003 }
5004
5005 /**
5006  * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
5007  * @pf: board private structure
5008  * @type: type of VSI
5009  *
5010  * On error: returns error code (negative)
5011  * On success: returns vsi index in PF (positive)
5012  **/
5013 static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
5014 {
5015         int ret = -ENODEV;
5016         struct i40e_vsi *vsi;
5017         int sz_vectors;
5018         int sz_rings;
5019         int vsi_idx;
5020         int i;
5021
5022         /* Need to protect the allocation of the VSIs at the PF level */
5023         mutex_lock(&pf->switch_mutex);
5024
5025         /* VSI list may be fragmented if VSI creation/destruction has
5026          * been happening.  We can afford to do a quick scan to look
5027          * for any free VSIs in the list.
5028          *
5029          * find next empty vsi slot, looping back around if necessary
5030          */
5031         i = pf->next_vsi;
5032         while (i < pf->hw.func_caps.num_vsis && pf->vsi[i])
5033                 i++;
5034         if (i >= pf->hw.func_caps.num_vsis) {
5035                 i = 0;
5036                 while (i < pf->next_vsi && pf->vsi[i])
5037                         i++;
5038         }
5039
5040         if (i < pf->hw.func_caps.num_vsis && !pf->vsi[i]) {
5041                 vsi_idx = i;             /* Found one! */
5042         } else {
5043                 ret = -ENODEV;
5044                 goto unlock_pf;  /* out of VSI slots! */
5045         }
5046         pf->next_vsi = ++i;
5047
5048         vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
5049         if (!vsi) {
5050                 ret = -ENOMEM;
5051                 goto unlock_pf;
5052         }
5053         vsi->type = type;
5054         vsi->back = pf;
5055         set_bit(__I40E_DOWN, &vsi->state);
5056         vsi->flags = 0;
5057         vsi->idx = vsi_idx;
5058         vsi->rx_itr_setting = pf->rx_itr_default;
5059         vsi->tx_itr_setting = pf->tx_itr_default;
5060         vsi->netdev_registered = false;
5061         vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
5062         INIT_LIST_HEAD(&vsi->mac_filter_list);
5063
5064         ret = i40e_set_num_rings_in_vsi(vsi);
5065         if (ret)
5066                 goto err_rings;
5067
5068         /* allocate memory for ring pointers */
5069         sz_rings = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs * 2;
5070         vsi->tx_rings = kzalloc(sz_rings, GFP_KERNEL);
5071         if (!vsi->tx_rings) {
5072                 ret = -ENOMEM;
5073                 goto err_rings;
5074         }
5075         vsi->rx_rings = &vsi->tx_rings[vsi->alloc_queue_pairs];
5076
5077         /* allocate memory for q_vector pointers */
5078         sz_vectors = sizeof(struct i40e_q_vectors *) * vsi->num_q_vectors;
5079         vsi->q_vectors = kzalloc(sz_vectors, GFP_KERNEL);
5080         if (!vsi->q_vectors) {
5081                 ret = -ENOMEM;
5082                 goto err_vectors;
5083         }
5084
5085         /* Setup default MSIX irq handler for VSI */
5086         i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);
5087
5088         pf->vsi[vsi_idx] = vsi;
5089         ret = vsi_idx;
5090         goto unlock_pf;
5091
5092 err_vectors:
5093         kfree(vsi->tx_rings);
5094 err_rings:
5095         pf->next_vsi = i - 1;
5096         kfree(vsi);
5097 unlock_pf:
5098         mutex_unlock(&pf->switch_mutex);
5099         return ret;
5100 }
5101
5102 /**
5103  * i40e_vsi_clear - Deallocate the VSI provided
5104  * @vsi: the VSI being un-configured
5105  **/
5106 static int i40e_vsi_clear(struct i40e_vsi *vsi)
5107 {
5108         struct i40e_pf *pf;
5109
5110         if (!vsi)
5111                 return 0;
5112
5113         if (!vsi->back)
5114                 goto free_vsi;
5115         pf = vsi->back;
5116
5117         mutex_lock(&pf->switch_mutex);
5118         if (!pf->vsi[vsi->idx]) {
5119                 dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](%p,type %d)\n",
5120                         vsi->idx, vsi->idx, vsi, vsi->type);
5121                 goto unlock_vsi;
5122         }
5123
5124         if (pf->vsi[vsi->idx] != vsi) {
5125                 dev_err(&pf->pdev->dev,
5126                         "pf->vsi[%d](%p, type %d) != vsi[%d](%p,type %d): no free!\n",
5127                         pf->vsi[vsi->idx]->idx,
5128                         pf->vsi[vsi->idx],
5129                         pf->vsi[vsi->idx]->type,
5130                         vsi->idx, vsi, vsi->type);
5131                 goto unlock_vsi;
5132         }
5133
5134         /* updates the pf for this cleared vsi */
5135         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
5136         i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);
5137
5138         /* free the ring and vector containers */
5139         kfree(vsi->q_vectors);
5140         kfree(vsi->tx_rings);
5141
5142         pf->vsi[vsi->idx] = NULL;
5143         if (vsi->idx < pf->next_vsi)
5144                 pf->next_vsi = vsi->idx;
5145
5146 unlock_vsi:
5147         mutex_unlock(&pf->switch_mutex);
5148 free_vsi:
5149         kfree(vsi);
5150
5151         return 0;
5152 }
5153
5154 /**
5155  * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
5156  * @vsi: the VSI being cleaned
5157  **/
5158 static s32 i40e_vsi_clear_rings(struct i40e_vsi *vsi)
5159 {
5160         int i;
5161
5162         for (i = 0; i < vsi->alloc_queue_pairs; i++) {
5163                 kfree_rcu(vsi->tx_rings[i], rcu);
5164                 vsi->tx_rings[i] = NULL;
5165                 vsi->rx_rings[i] = NULL;
5166         }
5167
5168         return 0;
5169 }
5170
5171 /**
5172  * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
5173  * @vsi: the VSI being configured
5174  **/
5175 static int i40e_alloc_rings(struct i40e_vsi *vsi)
5176 {
5177         struct i40e_pf *pf = vsi->back;
5178         int i;
5179
5180         /* Set basic values in the rings to be used later during open() */
5181         for (i = 0; i < vsi->alloc_queue_pairs; i++) {
5182                 struct i40e_ring *tx_ring;
5183                 struct i40e_ring *rx_ring;
5184
5185                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
5186                 if (!tx_ring)
5187                         goto err_out;
5188
5189                 tx_ring->queue_index = i;
5190                 tx_ring->reg_idx = vsi->base_queue + i;
5191                 tx_ring->ring_active = false;
5192                 tx_ring->vsi = vsi;
5193                 tx_ring->netdev = vsi->netdev;
5194                 tx_ring->dev = &pf->pdev->dev;
5195                 tx_ring->count = vsi->num_desc;
5196                 tx_ring->size = 0;
5197                 tx_ring->dcb_tc = 0;
5198                 vsi->tx_rings[i] = tx_ring;
5199
5200                 rx_ring = &tx_ring[1];
5201                 rx_ring->queue_index = i;
5202                 rx_ring->reg_idx = vsi->base_queue + i;
5203                 rx_ring->ring_active = false;
5204                 rx_ring->vsi = vsi;
5205                 rx_ring->netdev = vsi->netdev;
5206                 rx_ring->dev = &pf->pdev->dev;
5207                 rx_ring->count = vsi->num_desc;
5208                 rx_ring->size = 0;
5209                 rx_ring->dcb_tc = 0;
5210                 if (pf->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED)
5211                         set_ring_16byte_desc_enabled(rx_ring);
5212                 else
5213                         clear_ring_16byte_desc_enabled(rx_ring);
5214                 vsi->rx_rings[i] = rx_ring;
5215         }
5216
5217         return 0;
5218
5219 err_out:
5220         i40e_vsi_clear_rings(vsi);
5221         return -ENOMEM;
5222 }
5223
5224 /**
5225  * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
5226  * @pf: board private structure
5227  * @vectors: the number of MSI-X vectors to request
5228  *
5229  * Returns the number of vectors reserved, or error
5230  **/
5231 static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
5232 {
5233         int err = 0;
5234
5235         pf->num_msix_entries = 0;
5236         while (vectors >= I40E_MIN_MSIX) {
5237                 err = pci_enable_msix(pf->pdev, pf->msix_entries, vectors);
5238                 if (err == 0) {
5239                         /* good to go */
5240                         pf->num_msix_entries = vectors;
5241                         break;
5242                 } else if (err < 0) {
5243                         /* total failure */
5244                         dev_info(&pf->pdev->dev,
5245                                  "MSI-X vector reservation failed: %d\n", err);
5246                         vectors = 0;
5247                         break;
5248                 } else {
5249                         /* err > 0 is the hint for retry */
5250                         dev_info(&pf->pdev->dev,
5251                                  "MSI-X vectors wanted %d, retrying with %d\n",
5252                                  vectors, err);
5253                         vectors = err;
5254                 }
5255         }
5256
5257         if (vectors > 0 && vectors < I40E_MIN_MSIX) {
5258                 dev_info(&pf->pdev->dev,
5259                          "Couldn't get enough vectors, only %d available\n",
5260                          vectors);
5261                 vectors = 0;
5262         }
5263
5264         return vectors;
5265 }
5266
5267 /**
5268  * i40e_init_msix - Setup the MSIX capability
5269  * @pf: board private structure
5270  *
5271  * Work with the OS to set up the MSIX vectors needed.
5272  *
5273  * Returns 0 on success, negative on failure
5274  **/
5275 static int i40e_init_msix(struct i40e_pf *pf)
5276 {
5277         i40e_status err = 0;
5278         struct i40e_hw *hw = &pf->hw;
5279         int v_budget, i;
5280         int vec;
5281
5282         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
5283                 return -ENODEV;
5284
5285         /* The number of vectors we'll request will be comprised of:
5286          *   - Add 1 for "other" cause for Admin Queue events, etc.
5287          *   - The number of LAN queue pairs
5288          *        already adjusted for the NUMA node
5289          *        assumes symmetric Tx/Rx pairing
5290          *   - The number of VMDq pairs
5291          * Once we count this up, try the request.
5292          *
5293          * If we can't get what we want, we'll simplify to nearly nothing
5294          * and try again.  If that still fails, we punt.
5295          */
5296         pf->num_lan_msix = pf->num_lan_qps;
5297         pf->num_vmdq_msix = pf->num_vmdq_qps;
5298         v_budget = 1 + pf->num_lan_msix;
5299         v_budget += (pf->num_vmdq_vsis * pf->num_vmdq_msix);
5300         if (pf->flags & I40E_FLAG_FDIR_ENABLED)
5301                 v_budget++;
5302
5303         /* Scale down if necessary, and the rings will share vectors */
5304         v_budget = min_t(int, v_budget, hw->func_caps.num_msix_vectors);
5305
5306         pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
5307                                    GFP_KERNEL);
5308         if (!pf->msix_entries)
5309                 return -ENOMEM;
5310
5311         for (i = 0; i < v_budget; i++)
5312                 pf->msix_entries[i].entry = i;
5313         vec = i40e_reserve_msix_vectors(pf, v_budget);
5314         if (vec < I40E_MIN_MSIX) {
5315                 pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
5316                 kfree(pf->msix_entries);
5317                 pf->msix_entries = NULL;
5318                 return -ENODEV;
5319
5320         } else if (vec == I40E_MIN_MSIX) {
5321                 /* Adjust for minimal MSIX use */
5322                 dev_info(&pf->pdev->dev, "Features disabled, not enough MSIX vectors\n");
5323                 pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
5324                 pf->num_vmdq_vsis = 0;
5325                 pf->num_vmdq_qps = 0;
5326                 pf->num_vmdq_msix = 0;
5327                 pf->num_lan_qps = 1;
5328                 pf->num_lan_msix = 1;
5329
5330         } else if (vec != v_budget) {
5331                 /* Scale vector usage down */
5332                 pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
5333                 vec--;                    /* reserve the misc vector */
5334
5335                 /* partition out the remaining vectors */
5336                 switch (vec) {
5337                 case 2:
5338                         pf->num_vmdq_vsis = 1;
5339                         pf->num_lan_msix = 1;
5340                         break;
5341                 case 3:
5342                         pf->num_vmdq_vsis = 1;
5343                         pf->num_lan_msix = 2;
5344                         break;
5345                 default:
5346                         pf->num_lan_msix = min_t(int, (vec / 2),
5347                                                  pf->num_lan_qps);
5348                         pf->num_vmdq_vsis = min_t(int, (vec - pf->num_lan_msix),
5349                                                   I40E_DEFAULT_NUM_VMDQ_VSI);
5350                         break;
5351                 }
5352         }
5353
5354         return err;
5355 }
5356
5357 /**
5358  * i40e_alloc_q_vector - Allocate memory for a single interrupt vector
5359  * @vsi: the VSI being configured
5360  * @v_idx: index of the vector in the vsi struct
5361  *
5362  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
5363  **/
5364 static int i40e_alloc_q_vector(struct i40e_vsi *vsi, int v_idx)
5365 {
5366         struct i40e_q_vector *q_vector;
5367
5368         /* allocate q_vector */
5369         q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
5370         if (!q_vector)
5371                 return -ENOMEM;
5372
5373         q_vector->vsi = vsi;
5374         q_vector->v_idx = v_idx;
5375         cpumask_set_cpu(v_idx, &q_vector->affinity_mask);
5376         if (vsi->netdev)
5377                 netif_napi_add(vsi->netdev, &q_vector->napi,
5378                                i40e_napi_poll, vsi->work_limit);
5379
5380         q_vector->rx.latency_range = I40E_LOW_LATENCY;
5381         q_vector->tx.latency_range = I40E_LOW_LATENCY;
5382
5383         /* tie q_vector and vsi together */
5384         vsi->q_vectors[v_idx] = q_vector;
5385
5386         return 0;
5387 }
5388
5389 /**
5390  * i40e_alloc_q_vectors - Allocate memory for interrupt vectors
5391  * @vsi: the VSI being configured
5392  *
5393  * We allocate one q_vector per queue interrupt.  If allocation fails we
5394  * return -ENOMEM.
5395  **/
5396 static int i40e_alloc_q_vectors(struct i40e_vsi *vsi)
5397 {
5398         struct i40e_pf *pf = vsi->back;
5399         int v_idx, num_q_vectors;
5400         int err;
5401
5402         /* if not MSIX, give the one vector only to the LAN VSI */
5403         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5404                 num_q_vectors = vsi->num_q_vectors;
5405         else if (vsi == pf->vsi[pf->lan_vsi])
5406                 num_q_vectors = 1;
5407         else
5408                 return -EINVAL;
5409
5410         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
5411                 err = i40e_alloc_q_vector(vsi, v_idx);
5412                 if (err)
5413                         goto err_out;
5414         }
5415
5416         return 0;
5417
5418 err_out:
5419         while (v_idx--)
5420                 i40e_free_q_vector(vsi, v_idx);
5421
5422         return err;
5423 }
5424
5425 /**
5426  * i40e_init_interrupt_scheme - Determine proper interrupt scheme
5427  * @pf: board private structure to initialize
5428  **/
5429 static void i40e_init_interrupt_scheme(struct i40e_pf *pf)
5430 {
5431         int err = 0;
5432
5433         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
5434                 err = i40e_init_msix(pf);
5435                 if (err) {
5436                         pf->flags &= ~(I40E_FLAG_RSS_ENABLED       |
5437                                         I40E_FLAG_MQ_ENABLED       |
5438                                         I40E_FLAG_DCB_ENABLED      |
5439                                         I40E_FLAG_SRIOV_ENABLED    |
5440                                         I40E_FLAG_FDIR_ENABLED     |
5441                                         I40E_FLAG_FDIR_ATR_ENABLED |
5442                                         I40E_FLAG_VMDQ_ENABLED);
5443
5444                         /* rework the queue expectations without MSIX */
5445                         i40e_determine_queue_usage(pf);
5446                 }
5447         }
5448
5449         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED) &&
5450             (pf->flags & I40E_FLAG_MSI_ENABLED)) {
5451                 err = pci_enable_msi(pf->pdev);
5452                 if (err) {
5453                         dev_info(&pf->pdev->dev,
5454                                  "MSI init failed (%d), trying legacy.\n", err);
5455                         pf->flags &= ~I40E_FLAG_MSI_ENABLED;
5456                 }
5457         }
5458
5459         /* track first vector for misc interrupts */
5460         err = i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT-1);
5461 }
5462
5463 /**
5464  * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
5465  * @pf: board private structure
5466  *
5467  * This sets up the handler for MSIX 0, which is used to manage the
5468  * non-queue interrupts, e.g. AdminQ and errors.  This is not used
5469  * when in MSI or Legacy interrupt mode.
5470  **/
5471 static int i40e_setup_misc_vector(struct i40e_pf *pf)
5472 {
5473         struct i40e_hw *hw = &pf->hw;
5474         int err = 0;
5475
5476         /* Only request the irq if this is the first time through, and
5477          * not when we're rebuilding after a Reset
5478          */
5479         if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
5480                 err = request_irq(pf->msix_entries[0].vector,
5481                                   i40e_intr, 0, pf->misc_int_name, pf);
5482                 if (err) {
5483                         dev_info(&pf->pdev->dev,
5484                                  "request_irq for msix_misc failed: %d\n", err);
5485                         return -EFAULT;
5486                 }
5487         }
5488
5489         i40e_enable_misc_int_causes(hw);
5490
5491         /* associate no queues to the misc vector */
5492         wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
5493         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K);
5494
5495         i40e_flush(hw);
5496
5497         i40e_irq_dynamic_enable_icr0(pf);
5498
5499         return err;
5500 }
5501
5502 /**
5503  * i40e_config_rss - Prepare for RSS if used
5504  * @pf: board private structure
5505  **/
5506 static int i40e_config_rss(struct i40e_pf *pf)
5507 {
5508         struct i40e_hw *hw = &pf->hw;
5509         u32 lut = 0;
5510         int i, j;
5511         u64 hena;
5512         /* Set of random keys generated using kernel random number generator */
5513         static const u32 seed[I40E_PFQF_HKEY_MAX_INDEX + 1] = {0x41b01687,
5514                                 0x183cfd8c, 0xce880440, 0x580cbc3c, 0x35897377,
5515                                 0x328b25e1, 0x4fa98922, 0xb7d90c14, 0xd5bad70d,
5516                                 0xcd15a2c1, 0xe8580225, 0x4a1e9d11, 0xfe5731be};
5517
5518         /* Fill out hash function seed */
5519         for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
5520                 wr32(hw, I40E_PFQF_HKEY(i), seed[i]);
5521
5522         /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
5523         hena = (u64)rd32(hw, I40E_PFQF_HENA(0)) |
5524                 ((u64)rd32(hw, I40E_PFQF_HENA(1)) << 32);
5525         hena |= ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_UDP) |
5526                 ((u64)1 << I40E_FILTER_PCTYPE_NONF_UNICAST_IPV4_UDP) |
5527                 ((u64)1 << I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV4_UDP) |
5528                 ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV4_TCP) |
5529                 ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_TCP) |
5530                 ((u64)1 << I40E_FILTER_PCTYPE_NONF_IPV6_UDP) |
5531                 ((u64)1 << I40E_FILTER_PCTYPE_NONF_UNICAST_IPV6_UDP) |
5532                 ((u64)1 << I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV6_UDP) |
5533                 ((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV4)|
5534                 ((u64)1 << I40E_FILTER_PCTYPE_FRAG_IPV6);
5535         wr32(hw, I40E_PFQF_HENA(0), (u32)hena);
5536         wr32(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
5537
5538         /* Populate the LUT with max no. of queues in round robin fashion */
5539         for (i = 0, j = 0; i < pf->hw.func_caps.rss_table_size; i++, j++) {
5540
5541                 /* The assumption is that lan qp count will be the highest
5542                  * qp count for any PF VSI that needs RSS.
5543                  * If multiple VSIs need RSS support, all the qp counts
5544                  * for those VSIs should be a power of 2 for RSS to work.
5545                  * If LAN VSI is the only consumer for RSS then this requirement
5546                  * is not necessary.
5547                  */
5548                 if (j == pf->rss_size)
5549                         j = 0;
5550                 /* lut = 4-byte sliding window of 4 lut entries */
5551                 lut = (lut << 8) | (j &
5552                          ((0x1 << pf->hw.func_caps.rss_table_entry_width) - 1));
5553                 /* On i = 3, we have 4 entries in lut; write to the register */
5554                 if ((i & 3) == 3)
5555                         wr32(hw, I40E_PFQF_HLUT(i >> 2), lut);
5556         }
5557         i40e_flush(hw);
5558
5559         return 0;
5560 }
5561
5562 /**
5563  * i40e_sw_init - Initialize general software structures (struct i40e_pf)
5564  * @pf: board private structure to initialize
5565  *
5566  * i40e_sw_init initializes the Adapter private data structure.
5567  * Fields are initialized based on PCI device information and
5568  * OS network device settings (MTU size).
5569  **/
5570 static int i40e_sw_init(struct i40e_pf *pf)
5571 {
5572         int err = 0;
5573         int size;
5574
5575         pf->msg_enable = netif_msg_init(I40E_DEFAULT_MSG_ENABLE,
5576                                 (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK));
5577         if (debug != -1 && debug != I40E_DEFAULT_MSG_ENABLE) {
5578                 if (I40E_DEBUG_USER & debug)
5579                         pf->hw.debug_mask = debug;
5580                 pf->msg_enable = netif_msg_init((debug & ~I40E_DEBUG_USER),
5581                                                 I40E_DEFAULT_MSG_ENABLE);
5582         }
5583
5584         /* Set default capability flags */
5585         pf->flags = I40E_FLAG_RX_CSUM_ENABLED |
5586                     I40E_FLAG_MSI_ENABLED     |
5587                     I40E_FLAG_MSIX_ENABLED    |
5588                     I40E_FLAG_RX_PS_ENABLED   |
5589                     I40E_FLAG_MQ_ENABLED      |
5590                     I40E_FLAG_RX_1BUF_ENABLED;
5591
5592         pf->rss_size_max = 0x1 << pf->hw.func_caps.rss_table_entry_width;
5593         if (pf->hw.func_caps.rss) {
5594                 pf->flags |= I40E_FLAG_RSS_ENABLED;
5595                 pf->rss_size = min_t(int, pf->rss_size_max,
5596                                      nr_cpus_node(numa_node_id()));
5597         } else {
5598                 pf->rss_size = 1;
5599         }
5600
5601         if (pf->hw.func_caps.dcb)
5602                 pf->num_tc_qps = I40E_DEFAULT_QUEUES_PER_TC;
5603         else
5604                 pf->num_tc_qps = 0;
5605
5606         if (pf->hw.func_caps.fd) {
5607                 /* FW/NVM is not yet fixed in this regard */
5608                 if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
5609                     (pf->hw.func_caps.fd_filters_best_effort > 0)) {
5610                         pf->flags |= I40E_FLAG_FDIR_ATR_ENABLED;
5611                         dev_info(&pf->pdev->dev,
5612                                  "Flow Director ATR mode Enabled\n");
5613                         pf->flags |= I40E_FLAG_FDIR_ENABLED;
5614                         dev_info(&pf->pdev->dev,
5615                                  "Flow Director Side Band mode Enabled\n");
5616                         pf->fdir_pf_filter_count =
5617                                          pf->hw.func_caps.fd_filters_guaranteed;
5618                 }
5619         } else {
5620                 pf->fdir_pf_filter_count = 0;
5621         }
5622
5623         if (pf->hw.func_caps.vmdq) {
5624                 pf->flags |= I40E_FLAG_VMDQ_ENABLED;
5625                 pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
5626                 pf->num_vmdq_qps = I40E_DEFAULT_QUEUES_PER_VMDQ;
5627         }
5628
5629         /* MFP mode enabled */
5630         if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.mfp_mode_1) {
5631                 pf->flags |= I40E_FLAG_MFP_ENABLED;
5632                 dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
5633         }
5634
5635 #ifdef CONFIG_PCI_IOV
5636         if (pf->hw.func_caps.num_vfs) {
5637                 pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
5638                 pf->flags |= I40E_FLAG_SRIOV_ENABLED;
5639                 pf->num_req_vfs = min_t(int,
5640                                         pf->hw.func_caps.num_vfs,
5641                                         I40E_MAX_VF_COUNT);
5642         }
5643 #endif /* CONFIG_PCI_IOV */
5644         pf->eeprom_version = 0xDEAD;
5645         pf->lan_veb = I40E_NO_VEB;
5646         pf->lan_vsi = I40E_NO_VSI;
5647
5648         /* set up queue assignment tracking */
5649         size = sizeof(struct i40e_lump_tracking)
5650                 + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
5651         pf->qp_pile = kzalloc(size, GFP_KERNEL);
5652         if (!pf->qp_pile) {
5653                 err = -ENOMEM;
5654                 goto sw_init_done;
5655         }
5656         pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;
5657         pf->qp_pile->search_hint = 0;
5658
5659         /* set up vector assignment tracking */
5660         size = sizeof(struct i40e_lump_tracking)
5661                 + (sizeof(u16) * pf->hw.func_caps.num_msix_vectors);
5662         pf->irq_pile = kzalloc(size, GFP_KERNEL);
5663         if (!pf->irq_pile) {
5664                 kfree(pf->qp_pile);
5665                 err = -ENOMEM;
5666                 goto sw_init_done;
5667         }
5668         pf->irq_pile->num_entries = pf->hw.func_caps.num_msix_vectors;
5669         pf->irq_pile->search_hint = 0;
5670
5671         mutex_init(&pf->switch_mutex);
5672
5673 sw_init_done:
5674         return err;
5675 }
5676
5677 /**
5678  * i40e_set_features - set the netdev feature flags
5679  * @netdev: ptr to the netdev being adjusted
5680  * @features: the feature set that the stack is suggesting
5681  **/
5682 static int i40e_set_features(struct net_device *netdev,
5683                              netdev_features_t features)
5684 {
5685         struct i40e_netdev_priv *np = netdev_priv(netdev);
5686         struct i40e_vsi *vsi = np->vsi;
5687
5688         if (features & NETIF_F_HW_VLAN_CTAG_RX)
5689                 i40e_vlan_stripping_enable(vsi);
5690         else
5691                 i40e_vlan_stripping_disable(vsi);
5692
5693         return 0;
5694 }
5695
5696 static const struct net_device_ops i40e_netdev_ops = {
5697         .ndo_open               = i40e_open,
5698         .ndo_stop               = i40e_close,
5699         .ndo_start_xmit         = i40e_lan_xmit_frame,
5700         .ndo_get_stats64        = i40e_get_netdev_stats_struct,
5701         .ndo_set_rx_mode        = i40e_set_rx_mode,
5702         .ndo_validate_addr      = eth_validate_addr,
5703         .ndo_set_mac_address    = i40e_set_mac,
5704         .ndo_change_mtu         = i40e_change_mtu,
5705         .ndo_tx_timeout         = i40e_tx_timeout,
5706         .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
5707         .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
5708 #ifdef CONFIG_NET_POLL_CONTROLLER
5709         .ndo_poll_controller    = i40e_netpoll,
5710 #endif
5711         .ndo_setup_tc           = i40e_setup_tc,
5712         .ndo_set_features       = i40e_set_features,
5713         .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
5714         .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
5715         .ndo_set_vf_tx_rate     = i40e_ndo_set_vf_bw,
5716         .ndo_get_vf_config      = i40e_ndo_get_vf_config,
5717 };
5718
5719 /**
5720  * i40e_config_netdev - Setup the netdev flags
5721  * @vsi: the VSI being configured
5722  *
5723  * Returns 0 on success, negative value on failure
5724  **/
5725 static int i40e_config_netdev(struct i40e_vsi *vsi)
5726 {
5727         struct i40e_pf *pf = vsi->back;
5728         struct i40e_hw *hw = &pf->hw;
5729         struct i40e_netdev_priv *np;
5730         struct net_device *netdev;
5731         u8 mac_addr[ETH_ALEN];
5732         int etherdev_size;
5733
5734         etherdev_size = sizeof(struct i40e_netdev_priv);
5735         netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
5736         if (!netdev)
5737                 return -ENOMEM;
5738
5739         vsi->netdev = netdev;
5740         np = netdev_priv(netdev);
5741         np->vsi = vsi;
5742
5743         netdev->hw_enc_features = NETIF_F_IP_CSUM        |
5744                                   NETIF_F_GSO_UDP_TUNNEL |
5745                                   NETIF_F_TSO            |
5746                                   NETIF_F_SG;
5747
5748         netdev->features = NETIF_F_SG                  |
5749                            NETIF_F_IP_CSUM             |
5750                            NETIF_F_SCTP_CSUM           |
5751                            NETIF_F_HIGHDMA             |
5752                            NETIF_F_GSO_UDP_TUNNEL      |
5753                            NETIF_F_HW_VLAN_CTAG_TX     |
5754                            NETIF_F_HW_VLAN_CTAG_RX     |
5755                            NETIF_F_HW_VLAN_CTAG_FILTER |
5756                            NETIF_F_IPV6_CSUM           |
5757                            NETIF_F_TSO                 |
5758                            NETIF_F_TSO6                |
5759                            NETIF_F_RXCSUM              |
5760                            NETIF_F_RXHASH              |
5761                            0;
5762
5763         /* copy netdev features into list of user selectable features */
5764         netdev->hw_features |= netdev->features;
5765
5766         if (vsi->type == I40E_VSI_MAIN) {
5767                 SET_NETDEV_DEV(netdev, &pf->pdev->dev);
5768                 memcpy(mac_addr, hw->mac.perm_addr, ETH_ALEN);
5769         } else {
5770                 /* relate the VSI_VMDQ name to the VSI_MAIN name */
5771                 snprintf(netdev->name, IFNAMSIZ, "%sv%%d",
5772                          pf->vsi[pf->lan_vsi]->netdev->name);
5773                 random_ether_addr(mac_addr);
5774                 i40e_add_filter(vsi, mac_addr, I40E_VLAN_ANY, false, false);
5775         }
5776
5777         memcpy(netdev->dev_addr, mac_addr, ETH_ALEN);
5778         memcpy(netdev->perm_addr, mac_addr, ETH_ALEN);
5779         /* vlan gets same features (except vlan offload)
5780          * after any tweaks for specific VSI types
5781          */
5782         netdev->vlan_features = netdev->features & ~(NETIF_F_HW_VLAN_CTAG_TX |
5783                                                      NETIF_F_HW_VLAN_CTAG_RX |
5784                                                    NETIF_F_HW_VLAN_CTAG_FILTER);
5785         netdev->priv_flags |= IFF_UNICAST_FLT;
5786         netdev->priv_flags |= IFF_SUPP_NOFCS;
5787         /* Setup netdev TC information */
5788         i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);
5789
5790         netdev->netdev_ops = &i40e_netdev_ops;
5791         netdev->watchdog_timeo = 5 * HZ;
5792         i40e_set_ethtool_ops(netdev);
5793
5794         return 0;
5795 }
5796
5797 /**
5798  * i40e_vsi_delete - Delete a VSI from the switch
5799  * @vsi: the VSI being removed
5800  *
5801  * Returns 0 on success, negative value on failure
5802  **/
5803 static void i40e_vsi_delete(struct i40e_vsi *vsi)
5804 {
5805         /* remove default VSI is not allowed */
5806         if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
5807                 return;
5808
5809         /* there is no HW VSI for FDIR */
5810         if (vsi->type == I40E_VSI_FDIR)
5811                 return;
5812
5813         i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
5814         return;
5815 }
5816
5817 /**
5818  * i40e_add_vsi - Add a VSI to the switch
5819  * @vsi: the VSI being configured
5820  *
5821  * This initializes a VSI context depending on the VSI type to be added and
5822  * passes it down to the add_vsi aq command.
5823  **/
5824 static int i40e_add_vsi(struct i40e_vsi *vsi)
5825 {
5826         int ret = -ENODEV;
5827         struct i40e_mac_filter *f, *ftmp;
5828         struct i40e_pf *pf = vsi->back;
5829         struct i40e_hw *hw = &pf->hw;
5830         struct i40e_vsi_context ctxt;
5831         u8 enabled_tc = 0x1; /* TC0 enabled */
5832         int f_count = 0;
5833
5834         memset(&ctxt, 0, sizeof(ctxt));
5835         switch (vsi->type) {
5836         case I40E_VSI_MAIN:
5837                 /* The PF's main VSI is already setup as part of the
5838                  * device initialization, so we'll not bother with
5839                  * the add_vsi call, but we will retrieve the current
5840                  * VSI context.
5841                  */
5842                 ctxt.seid = pf->main_vsi_seid;
5843                 ctxt.pf_num = pf->hw.pf_id;
5844                 ctxt.vf_num = 0;
5845                 ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
5846                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
5847                 if (ret) {
5848                         dev_info(&pf->pdev->dev,
5849                                  "couldn't get pf vsi config, err %d, aq_err %d\n",
5850                                  ret, pf->hw.aq.asq_last_status);
5851                         return -ENOENT;
5852                 }
5853                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
5854                 vsi->info.valid_sections = 0;
5855
5856                 vsi->seid = ctxt.seid;
5857                 vsi->id = ctxt.vsi_number;
5858
5859                 enabled_tc = i40e_pf_get_tc_map(pf);
5860
5861                 /* MFP mode setup queue map and update VSI */
5862                 if (pf->flags & I40E_FLAG_MFP_ENABLED) {
5863                         memset(&ctxt, 0, sizeof(ctxt));
5864                         ctxt.seid = pf->main_vsi_seid;
5865                         ctxt.pf_num = pf->hw.pf_id;
5866                         ctxt.vf_num = 0;
5867                         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
5868                         ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
5869                         if (ret) {
5870                                 dev_info(&pf->pdev->dev,
5871                                          "update vsi failed, aq_err=%d\n",
5872                                          pf->hw.aq.asq_last_status);
5873                                 ret = -ENOENT;
5874                                 goto err;
5875                         }
5876                         /* update the local VSI info queue map */
5877                         i40e_vsi_update_queue_map(vsi, &ctxt);
5878                         vsi->info.valid_sections = 0;
5879                 } else {
5880                         /* Default/Main VSI is only enabled for TC0
5881                          * reconfigure it to enable all TCs that are
5882                          * available on the port in SFP mode.
5883                          */
5884                         ret = i40e_vsi_config_tc(vsi, enabled_tc);
5885                         if (ret) {
5886                                 dev_info(&pf->pdev->dev,
5887                                          "failed to configure TCs for main VSI tc_map 0x%08x, err %d, aq_err %d\n",
5888                                          enabled_tc, ret,
5889                                          pf->hw.aq.asq_last_status);
5890                                 ret = -ENOENT;
5891                         }
5892                 }
5893                 break;
5894
5895         case I40E_VSI_FDIR:
5896                 /* no queue mapping or actual HW VSI needed */
5897                 vsi->info.valid_sections = 0;
5898                 vsi->seid = 0;
5899                 vsi->id = 0;
5900                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
5901                 return 0;
5902                 break;
5903
5904         case I40E_VSI_VMDQ2:
5905                 ctxt.pf_num = hw->pf_id;
5906                 ctxt.vf_num = 0;
5907                 ctxt.uplink_seid = vsi->uplink_seid;
5908                 ctxt.connection_type = 0x1;     /* regular data port */
5909                 ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;
5910
5911                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
5912
5913                 /* This VSI is connected to VEB so the switch_id
5914                  * should be set to zero by default.
5915                  */
5916                 ctxt.info.switch_id = 0;
5917                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_LOCAL_LB);
5918                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
5919
5920                 /* Setup the VSI tx/rx queue map for TC0 only for now */
5921                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
5922                 break;
5923
5924         case I40E_VSI_SRIOV:
5925                 ctxt.pf_num = hw->pf_id;
5926                 ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
5927                 ctxt.uplink_seid = vsi->uplink_seid;
5928                 ctxt.connection_type = 0x1;     /* regular data port */
5929                 ctxt.flags = I40E_AQ_VSI_TYPE_VF;
5930
5931                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
5932
5933                 /* This VSI is connected to VEB so the switch_id
5934                  * should be set to zero by default.
5935                  */
5936                 ctxt.info.switch_id = cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
5937
5938                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
5939                 ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
5940                 /* Setup the VSI tx/rx queue map for TC0 only for now */
5941                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
5942                 break;
5943
5944         default:
5945                 return -ENODEV;
5946         }
5947
5948         if (vsi->type != I40E_VSI_MAIN) {
5949                 ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
5950                 if (ret) {
5951                         dev_info(&vsi->back->pdev->dev,
5952                                  "add vsi failed, aq_err=%d\n",
5953                                  vsi->back->hw.aq.asq_last_status);
5954                         ret = -ENOENT;
5955                         goto err;
5956                 }
5957                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
5958                 vsi->info.valid_sections = 0;
5959                 vsi->seid = ctxt.seid;
5960                 vsi->id = ctxt.vsi_number;
5961         }
5962
5963         /* If macvlan filters already exist, force them to get loaded */
5964         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
5965                 f->changed = true;
5966                 f_count++;
5967         }
5968         if (f_count) {
5969                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
5970                 pf->flags |= I40E_FLAG_FILTER_SYNC;
5971         }
5972
5973         /* Update VSI BW information */
5974         ret = i40e_vsi_get_bw_info(vsi);
5975         if (ret) {
5976                 dev_info(&pf->pdev->dev,
5977                          "couldn't get vsi bw info, err %d, aq_err %d\n",
5978                          ret, pf->hw.aq.asq_last_status);
5979                 /* VSI is already added so not tearing that up */
5980                 ret = 0;
5981         }
5982
5983 err:
5984         return ret;
5985 }
5986
5987 /**
5988  * i40e_vsi_release - Delete a VSI and free its resources
5989  * @vsi: the VSI being removed
5990  *
5991  * Returns 0 on success or < 0 on error
5992  **/
5993 int i40e_vsi_release(struct i40e_vsi *vsi)
5994 {
5995         struct i40e_mac_filter *f, *ftmp;
5996         struct i40e_veb *veb = NULL;
5997         struct i40e_pf *pf;
5998         u16 uplink_seid;
5999         int i, n;
6000
6001         pf = vsi->back;
6002
6003         /* release of a VEB-owner or last VSI is not allowed */
6004         if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
6005                 dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
6006                          vsi->seid, vsi->uplink_seid);
6007                 return -ENODEV;
6008         }
6009         if (vsi == pf->vsi[pf->lan_vsi] &&
6010             !test_bit(__I40E_DOWN, &pf->state)) {
6011                 dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
6012                 return -ENODEV;
6013         }
6014
6015         uplink_seid = vsi->uplink_seid;
6016         if (vsi->type != I40E_VSI_SRIOV) {
6017                 if (vsi->netdev_registered) {
6018                         vsi->netdev_registered = false;
6019                         if (vsi->netdev) {
6020                                 /* results in a call to i40e_close() */
6021                                 unregister_netdev(vsi->netdev);
6022                                 free_netdev(vsi->netdev);
6023                                 vsi->netdev = NULL;
6024                         }
6025                 } else {
6026                         if (!test_and_set_bit(__I40E_DOWN, &vsi->state))
6027                                 i40e_down(vsi);
6028                         i40e_vsi_free_irq(vsi);
6029                         i40e_vsi_free_tx_resources(vsi);
6030                         i40e_vsi_free_rx_resources(vsi);
6031                 }
6032                 i40e_vsi_disable_irq(vsi);
6033         }
6034
6035         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list)
6036                 i40e_del_filter(vsi, f->macaddr, f->vlan,
6037                                 f->is_vf, f->is_netdev);
6038         i40e_sync_vsi_filters(vsi);
6039
6040         i40e_vsi_delete(vsi);
6041         i40e_vsi_free_q_vectors(vsi);
6042         i40e_vsi_clear_rings(vsi);
6043         i40e_vsi_clear(vsi);
6044
6045         /* If this was the last thing on the VEB, except for the
6046          * controlling VSI, remove the VEB, which puts the controlling
6047          * VSI onto the next level down in the switch.
6048          *
6049          * Well, okay, there's one more exception here: don't remove
6050          * the orphan VEBs yet.  We'll wait for an explicit remove request
6051          * from up the network stack.
6052          */
6053         for (n = 0, i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6054                 if (pf->vsi[i] &&
6055                     pf->vsi[i]->uplink_seid == uplink_seid &&
6056                     (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
6057                         n++;      /* count the VSIs */
6058                 }
6059         }
6060         for (i = 0; i < I40E_MAX_VEB; i++) {
6061                 if (!pf->veb[i])
6062                         continue;
6063                 if (pf->veb[i]->uplink_seid == uplink_seid)
6064                         n++;     /* count the VEBs */
6065                 if (pf->veb[i]->seid == uplink_seid)
6066                         veb = pf->veb[i];
6067         }
6068         if (n == 0 && veb && veb->uplink_seid != 0)
6069                 i40e_veb_release(veb);
6070
6071         return 0;
6072 }
6073
6074 /**
6075  * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
6076  * @vsi: ptr to the VSI
6077  *
6078  * This should only be called after i40e_vsi_mem_alloc() which allocates the
6079  * corresponding SW VSI structure and initializes num_queue_pairs for the
6080  * newly allocated VSI.
6081  *
6082  * Returns 0 on success or negative on failure
6083  **/
6084 static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
6085 {
6086         int ret = -ENOENT;
6087         struct i40e_pf *pf = vsi->back;
6088
6089         if (vsi->q_vectors[0]) {
6090                 dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
6091                          vsi->seid);
6092                 return -EEXIST;
6093         }
6094
6095         if (vsi->base_vector) {
6096                 dev_info(&pf->pdev->dev,
6097                          "VSI %d has non-zero base vector %d\n",
6098                          vsi->seid, vsi->base_vector);
6099                 return -EEXIST;
6100         }
6101
6102         ret = i40e_alloc_q_vectors(vsi);
6103         if (ret) {
6104                 dev_info(&pf->pdev->dev,
6105                          "failed to allocate %d q_vector for VSI %d, ret=%d\n",
6106                          vsi->num_q_vectors, vsi->seid, ret);
6107                 vsi->num_q_vectors = 0;
6108                 goto vector_setup_out;
6109         }
6110
6111         vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
6112                                          vsi->num_q_vectors, vsi->idx);
6113         if (vsi->base_vector < 0) {
6114                 dev_info(&pf->pdev->dev,
6115                          "failed to get q tracking for VSI %d, err=%d\n",
6116                          vsi->seid, vsi->base_vector);
6117                 i40e_vsi_free_q_vectors(vsi);
6118                 ret = -ENOENT;
6119                 goto vector_setup_out;
6120         }
6121
6122 vector_setup_out:
6123         return ret;
6124 }
6125
6126 /**
6127  * i40e_vsi_setup - Set up a VSI by a given type
6128  * @pf: board private structure
6129  * @type: VSI type
6130  * @uplink_seid: the switch element to link to
6131  * @param1: usage depends upon VSI type. For VF types, indicates VF id
6132  *
6133  * This allocates the sw VSI structure and its queue resources, then add a VSI
6134  * to the identified VEB.
6135  *
6136  * Returns pointer to the successfully allocated and configure VSI sw struct on
6137  * success, otherwise returns NULL on failure.
6138  **/
6139 struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
6140                                 u16 uplink_seid, u32 param1)
6141 {
6142         struct i40e_vsi *vsi = NULL;
6143         struct i40e_veb *veb = NULL;
6144         int ret, i;
6145         int v_idx;
6146
6147         /* The requested uplink_seid must be either
6148          *     - the PF's port seid
6149          *              no VEB is needed because this is the PF
6150          *              or this is a Flow Director special case VSI
6151          *     - seid of an existing VEB
6152          *     - seid of a VSI that owns an existing VEB
6153          *     - seid of a VSI that doesn't own a VEB
6154          *              a new VEB is created and the VSI becomes the owner
6155          *     - seid of the PF VSI, which is what creates the first VEB
6156          *              this is a special case of the previous
6157          *
6158          * Find which uplink_seid we were given and create a new VEB if needed
6159          */
6160         for (i = 0; i < I40E_MAX_VEB; i++) {
6161                 if (pf->veb[i] && pf->veb[i]->seid == uplink_seid) {
6162                         veb = pf->veb[i];
6163                         break;
6164                 }
6165         }
6166
6167         if (!veb && uplink_seid != pf->mac_seid) {
6168
6169                 for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6170                         if (pf->vsi[i] && pf->vsi[i]->seid == uplink_seid) {
6171                                 vsi = pf->vsi[i];
6172                                 break;
6173                         }
6174                 }
6175                 if (!vsi) {
6176                         dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
6177                                  uplink_seid);
6178                         return NULL;
6179                 }
6180
6181                 if (vsi->uplink_seid == pf->mac_seid)
6182                         veb = i40e_veb_setup(pf, 0, pf->mac_seid, vsi->seid,
6183                                              vsi->tc_config.enabled_tc);
6184                 else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
6185                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
6186                                              vsi->tc_config.enabled_tc);
6187
6188                 for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
6189                         if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
6190                                 veb = pf->veb[i];
6191                 }
6192                 if (!veb) {
6193                         dev_info(&pf->pdev->dev, "couldn't add VEB\n");
6194                         return NULL;
6195                 }
6196
6197                 vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
6198                 uplink_seid = veb->seid;
6199         }
6200
6201         /* get vsi sw struct */
6202         v_idx = i40e_vsi_mem_alloc(pf, type);
6203         if (v_idx < 0)
6204                 goto err_alloc;
6205         vsi = pf->vsi[v_idx];
6206         vsi->type = type;
6207         vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);
6208
6209         if (type == I40E_VSI_MAIN)
6210                 pf->lan_vsi = v_idx;
6211         else if (type == I40E_VSI_SRIOV)
6212                 vsi->vf_id = param1;
6213         /* assign it some queues */
6214         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
6215         if (ret < 0) {
6216                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
6217                          vsi->seid, ret);
6218                 goto err_vsi;
6219         }
6220         vsi->base_queue = ret;
6221
6222         /* get a VSI from the hardware */
6223         vsi->uplink_seid = uplink_seid;
6224         ret = i40e_add_vsi(vsi);
6225         if (ret)
6226                 goto err_vsi;
6227
6228         switch (vsi->type) {
6229         /* setup the netdev if needed */
6230         case I40E_VSI_MAIN:
6231         case I40E_VSI_VMDQ2:
6232                 ret = i40e_config_netdev(vsi);
6233                 if (ret)
6234                         goto err_netdev;
6235                 ret = register_netdev(vsi->netdev);
6236                 if (ret)
6237                         goto err_netdev;
6238                 vsi->netdev_registered = true;
6239                 netif_carrier_off(vsi->netdev);
6240                 /* fall through */
6241
6242         case I40E_VSI_FDIR:
6243                 /* set up vectors and rings if needed */
6244                 ret = i40e_vsi_setup_vectors(vsi);
6245                 if (ret)
6246                         goto err_msix;
6247
6248                 ret = i40e_alloc_rings(vsi);
6249                 if (ret)
6250                         goto err_rings;
6251
6252                 /* map all of the rings to the q_vectors */
6253                 i40e_vsi_map_rings_to_vectors(vsi);
6254
6255                 i40e_vsi_reset_stats(vsi);
6256                 break;
6257
6258         default:
6259                 /* no netdev or rings for the other VSI types */
6260                 break;
6261         }
6262
6263         return vsi;
6264
6265 err_rings:
6266         i40e_vsi_free_q_vectors(vsi);
6267 err_msix:
6268         if (vsi->netdev_registered) {
6269                 vsi->netdev_registered = false;
6270                 unregister_netdev(vsi->netdev);
6271                 free_netdev(vsi->netdev);
6272                 vsi->netdev = NULL;
6273         }
6274 err_netdev:
6275         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
6276 err_vsi:
6277         i40e_vsi_clear(vsi);
6278 err_alloc:
6279         return NULL;
6280 }
6281
6282 /**
6283  * i40e_veb_get_bw_info - Query VEB BW information
6284  * @veb: the veb to query
6285  *
6286  * Query the Tx scheduler BW configuration data for given VEB
6287  **/
6288 static int i40e_veb_get_bw_info(struct i40e_veb *veb)
6289 {
6290         struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
6291         struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
6292         struct i40e_pf *pf = veb->pf;
6293         struct i40e_hw *hw = &pf->hw;
6294         u32 tc_bw_max;
6295         int ret = 0;
6296         int i;
6297
6298         ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
6299                                                   &bw_data, NULL);
6300         if (ret) {
6301                 dev_info(&pf->pdev->dev,
6302                          "query veb bw config failed, aq_err=%d\n",
6303                          hw->aq.asq_last_status);
6304                 goto out;
6305         }
6306
6307         ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
6308                                                    &ets_data, NULL);
6309         if (ret) {
6310                 dev_info(&pf->pdev->dev,
6311                          "query veb bw ets config failed, aq_err=%d\n",
6312                          hw->aq.asq_last_status);
6313                 goto out;
6314         }
6315
6316         veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
6317         veb->bw_max_quanta = ets_data.tc_bw_max;
6318         veb->is_abs_credits = bw_data.absolute_credits_enable;
6319         tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
6320                     (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
6321         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
6322                 veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
6323                 veb->bw_tc_limit_credits[i] =
6324                                         le16_to_cpu(bw_data.tc_bw_limits[i]);
6325                 veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
6326         }
6327
6328 out:
6329         return ret;
6330 }
6331
6332 /**
6333  * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
6334  * @pf: board private structure
6335  *
6336  * On error: returns error code (negative)
6337  * On success: returns vsi index in PF (positive)
6338  **/
6339 static int i40e_veb_mem_alloc(struct i40e_pf *pf)
6340 {
6341         int ret = -ENOENT;
6342         struct i40e_veb *veb;
6343         int i;
6344
6345         /* Need to protect the allocation of switch elements at the PF level */
6346         mutex_lock(&pf->switch_mutex);
6347
6348         /* VEB list may be fragmented if VEB creation/destruction has
6349          * been happening.  We can afford to do a quick scan to look
6350          * for any free slots in the list.
6351          *
6352          * find next empty veb slot, looping back around if necessary
6353          */
6354         i = 0;
6355         while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
6356                 i++;
6357         if (i >= I40E_MAX_VEB) {
6358                 ret = -ENOMEM;
6359                 goto err_alloc_veb;  /* out of VEB slots! */
6360         }
6361
6362         veb = kzalloc(sizeof(*veb), GFP_KERNEL);
6363         if (!veb) {
6364                 ret = -ENOMEM;
6365                 goto err_alloc_veb;
6366         }
6367         veb->pf = pf;
6368         veb->idx = i;
6369         veb->enabled_tc = 1;
6370
6371         pf->veb[i] = veb;
6372         ret = i;
6373 err_alloc_veb:
6374         mutex_unlock(&pf->switch_mutex);
6375         return ret;
6376 }
6377
6378 /**
6379  * i40e_switch_branch_release - Delete a branch of the switch tree
6380  * @branch: where to start deleting
6381  *
6382  * This uses recursion to find the tips of the branch to be
6383  * removed, deleting until we get back to and can delete this VEB.
6384  **/
6385 static void i40e_switch_branch_release(struct i40e_veb *branch)
6386 {
6387         struct i40e_pf *pf = branch->pf;
6388         u16 branch_seid = branch->seid;
6389         u16 veb_idx = branch->idx;
6390         int i;
6391
6392         /* release any VEBs on this VEB - RECURSION */
6393         for (i = 0; i < I40E_MAX_VEB; i++) {
6394                 if (!pf->veb[i])
6395                         continue;
6396                 if (pf->veb[i]->uplink_seid == branch->seid)
6397                         i40e_switch_branch_release(pf->veb[i]);
6398         }
6399
6400         /* Release the VSIs on this VEB, but not the owner VSI.
6401          *
6402          * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
6403          *       the VEB itself, so don't use (*branch) after this loop.
6404          */
6405         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6406                 if (!pf->vsi[i])
6407                         continue;
6408                 if (pf->vsi[i]->uplink_seid == branch_seid &&
6409                    (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
6410                         i40e_vsi_release(pf->vsi[i]);
6411                 }
6412         }
6413
6414         /* There's one corner case where the VEB might not have been
6415          * removed, so double check it here and remove it if needed.
6416          * This case happens if the veb was created from the debugfs
6417          * commands and no VSIs were added to it.
6418          */
6419         if (pf->veb[veb_idx])
6420                 i40e_veb_release(pf->veb[veb_idx]);
6421 }
6422
6423 /**
6424  * i40e_veb_clear - remove veb struct
6425  * @veb: the veb to remove
6426  **/
6427 static void i40e_veb_clear(struct i40e_veb *veb)
6428 {
6429         if (!veb)
6430                 return;
6431
6432         if (veb->pf) {
6433                 struct i40e_pf *pf = veb->pf;
6434
6435                 mutex_lock(&pf->switch_mutex);
6436                 if (pf->veb[veb->idx] == veb)
6437                         pf->veb[veb->idx] = NULL;
6438                 mutex_unlock(&pf->switch_mutex);
6439         }
6440
6441         kfree(veb);
6442 }
6443
6444 /**
6445  * i40e_veb_release - Delete a VEB and free its resources
6446  * @veb: the VEB being removed
6447  **/
6448 void i40e_veb_release(struct i40e_veb *veb)
6449 {
6450         struct i40e_vsi *vsi = NULL;
6451         struct i40e_pf *pf;
6452         int i, n = 0;
6453
6454         pf = veb->pf;
6455
6456         /* find the remaining VSI and check for extras */
6457         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6458                 if (pf->vsi[i] && pf->vsi[i]->uplink_seid == veb->seid) {
6459                         n++;
6460                         vsi = pf->vsi[i];
6461                 }
6462         }
6463         if (n != 1) {
6464                 dev_info(&pf->pdev->dev,
6465                          "can't remove VEB %d with %d VSIs left\n",
6466                          veb->seid, n);
6467                 return;
6468         }
6469
6470         /* move the remaining VSI to uplink veb */
6471         vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
6472         if (veb->uplink_seid) {
6473                 vsi->uplink_seid = veb->uplink_seid;
6474                 if (veb->uplink_seid == pf->mac_seid)
6475                         vsi->veb_idx = I40E_NO_VEB;
6476                 else
6477                         vsi->veb_idx = veb->veb_idx;
6478         } else {
6479                 /* floating VEB */
6480                 vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
6481                 vsi->veb_idx = pf->vsi[pf->lan_vsi]->veb_idx;
6482         }
6483
6484         i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
6485         i40e_veb_clear(veb);
6486
6487         return;
6488 }
6489
6490 /**
6491  * i40e_add_veb - create the VEB in the switch
6492  * @veb: the VEB to be instantiated
6493  * @vsi: the controlling VSI
6494  **/
6495 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
6496 {
6497         bool is_default = (vsi->idx == vsi->back->lan_vsi);
6498         int ret;
6499
6500         /* get a VEB from the hardware */
6501         ret = i40e_aq_add_veb(&veb->pf->hw, veb->uplink_seid, vsi->seid,
6502                               veb->enabled_tc, is_default, &veb->seid, NULL);
6503         if (ret) {
6504                 dev_info(&veb->pf->pdev->dev,
6505                          "couldn't add VEB, err %d, aq_err %d\n",
6506                          ret, veb->pf->hw.aq.asq_last_status);
6507                 return -EPERM;
6508         }
6509
6510         /* get statistics counter */
6511         ret = i40e_aq_get_veb_parameters(&veb->pf->hw, veb->seid, NULL, NULL,
6512                                          &veb->stats_idx, NULL, NULL, NULL);
6513         if (ret) {
6514                 dev_info(&veb->pf->pdev->dev,
6515                          "couldn't get VEB statistics idx, err %d, aq_err %d\n",
6516                          ret, veb->pf->hw.aq.asq_last_status);
6517                 return -EPERM;
6518         }
6519         ret = i40e_veb_get_bw_info(veb);
6520         if (ret) {
6521                 dev_info(&veb->pf->pdev->dev,
6522                          "couldn't get VEB bw info, err %d, aq_err %d\n",
6523                          ret, veb->pf->hw.aq.asq_last_status);
6524                 i40e_aq_delete_element(&veb->pf->hw, veb->seid, NULL);
6525                 return -ENOENT;
6526         }
6527
6528         vsi->uplink_seid = veb->seid;
6529         vsi->veb_idx = veb->idx;
6530         vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
6531
6532         return 0;
6533 }
6534
6535 /**
6536  * i40e_veb_setup - Set up a VEB
6537  * @pf: board private structure
6538  * @flags: VEB setup flags
6539  * @uplink_seid: the switch element to link to
6540  * @vsi_seid: the initial VSI seid
6541  * @enabled_tc: Enabled TC bit-map
6542  *
6543  * This allocates the sw VEB structure and links it into the switch
6544  * It is possible and legal for this to be a duplicate of an already
6545  * existing VEB.  It is also possible for both uplink and vsi seids
6546  * to be zero, in order to create a floating VEB.
6547  *
6548  * Returns pointer to the successfully allocated VEB sw struct on
6549  * success, otherwise returns NULL on failure.
6550  **/
6551 struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 flags,
6552                                 u16 uplink_seid, u16 vsi_seid,
6553                                 u8 enabled_tc)
6554 {
6555         struct i40e_veb *veb, *uplink_veb = NULL;
6556         int vsi_idx, veb_idx;
6557         int ret;
6558
6559         /* if one seid is 0, the other must be 0 to create a floating relay */
6560         if ((uplink_seid == 0 || vsi_seid == 0) &&
6561             (uplink_seid + vsi_seid != 0)) {
6562                 dev_info(&pf->pdev->dev,
6563                          "one, not both seid's are 0: uplink=%d vsi=%d\n",
6564                          uplink_seid, vsi_seid);
6565                 return NULL;
6566         }
6567
6568         /* make sure there is such a vsi and uplink */
6569         for (vsi_idx = 0; vsi_idx < pf->hw.func_caps.num_vsis; vsi_idx++)
6570                 if (pf->vsi[vsi_idx] && pf->vsi[vsi_idx]->seid == vsi_seid)
6571                         break;
6572         if (vsi_idx >= pf->hw.func_caps.num_vsis && vsi_seid != 0) {
6573                 dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
6574                          vsi_seid);
6575                 return NULL;
6576         }
6577
6578         if (uplink_seid && uplink_seid != pf->mac_seid) {
6579                 for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
6580                         if (pf->veb[veb_idx] &&
6581                             pf->veb[veb_idx]->seid == uplink_seid) {
6582                                 uplink_veb = pf->veb[veb_idx];
6583                                 break;
6584                         }
6585                 }
6586                 if (!uplink_veb) {
6587                         dev_info(&pf->pdev->dev,
6588                                  "uplink seid %d not found\n", uplink_seid);
6589                         return NULL;
6590                 }
6591         }
6592
6593         /* get veb sw struct */
6594         veb_idx = i40e_veb_mem_alloc(pf);
6595         if (veb_idx < 0)
6596                 goto err_alloc;
6597         veb = pf->veb[veb_idx];
6598         veb->flags = flags;
6599         veb->uplink_seid = uplink_seid;
6600         veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
6601         veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);
6602
6603         /* create the VEB in the switch */
6604         ret = i40e_add_veb(veb, pf->vsi[vsi_idx]);
6605         if (ret)
6606                 goto err_veb;
6607
6608         return veb;
6609
6610 err_veb:
6611         i40e_veb_clear(veb);
6612 err_alloc:
6613         return NULL;
6614 }
6615
6616 /**
6617  * i40e_setup_pf_switch_element - set pf vars based on switch type
6618  * @pf: board private structure
6619  * @ele: element we are building info from
6620  * @num_reported: total number of elements
6621  * @printconfig: should we print the contents
6622  *
6623  * helper function to assist in extracting a few useful SEID values.
6624  **/
6625 static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
6626                                 struct i40e_aqc_switch_config_element_resp *ele,
6627                                 u16 num_reported, bool printconfig)
6628 {
6629         u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
6630         u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
6631         u8 element_type = ele->element_type;
6632         u16 seid = le16_to_cpu(ele->seid);
6633
6634         if (printconfig)
6635                 dev_info(&pf->pdev->dev,
6636                          "type=%d seid=%d uplink=%d downlink=%d\n",
6637                          element_type, seid, uplink_seid, downlink_seid);
6638
6639         switch (element_type) {
6640         case I40E_SWITCH_ELEMENT_TYPE_MAC:
6641                 pf->mac_seid = seid;
6642                 break;
6643         case I40E_SWITCH_ELEMENT_TYPE_VEB:
6644                 /* Main VEB? */
6645                 if (uplink_seid != pf->mac_seid)
6646                         break;
6647                 if (pf->lan_veb == I40E_NO_VEB) {
6648                         int v;
6649
6650                         /* find existing or else empty VEB */
6651                         for (v = 0; v < I40E_MAX_VEB; v++) {
6652                                 if (pf->veb[v] && (pf->veb[v]->seid == seid)) {
6653                                         pf->lan_veb = v;
6654                                         break;
6655                                 }
6656                         }
6657                         if (pf->lan_veb == I40E_NO_VEB) {
6658                                 v = i40e_veb_mem_alloc(pf);
6659                                 if (v < 0)
6660                                         break;
6661                                 pf->lan_veb = v;
6662                         }
6663                 }
6664
6665                 pf->veb[pf->lan_veb]->seid = seid;
6666                 pf->veb[pf->lan_veb]->uplink_seid = pf->mac_seid;
6667                 pf->veb[pf->lan_veb]->pf = pf;
6668                 pf->veb[pf->lan_veb]->veb_idx = I40E_NO_VEB;
6669                 break;
6670         case I40E_SWITCH_ELEMENT_TYPE_VSI:
6671                 if (num_reported != 1)
6672                         break;
6673                 /* This is immediately after a reset so we can assume this is
6674                  * the PF's VSI
6675                  */
6676                 pf->mac_seid = uplink_seid;
6677                 pf->pf_seid = downlink_seid;
6678                 pf->main_vsi_seid = seid;
6679                 if (printconfig)
6680                         dev_info(&pf->pdev->dev,
6681                                  "pf_seid=%d main_vsi_seid=%d\n",
6682                                  pf->pf_seid, pf->main_vsi_seid);
6683                 break;
6684         case I40E_SWITCH_ELEMENT_TYPE_PF:
6685         case I40E_SWITCH_ELEMENT_TYPE_VF:
6686         case I40E_SWITCH_ELEMENT_TYPE_EMP:
6687         case I40E_SWITCH_ELEMENT_TYPE_BMC:
6688         case I40E_SWITCH_ELEMENT_TYPE_PE:
6689         case I40E_SWITCH_ELEMENT_TYPE_PA:
6690                 /* ignore these for now */
6691                 break;
6692         default:
6693                 dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
6694                          element_type, seid);
6695                 break;
6696         }
6697 }
6698
6699 /**
6700  * i40e_fetch_switch_configuration - Get switch config from firmware
6701  * @pf: board private structure
6702  * @printconfig: should we print the contents
6703  *
6704  * Get the current switch configuration from the device and
6705  * extract a few useful SEID values.
6706  **/
6707 int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
6708 {
6709         struct i40e_aqc_get_switch_config_resp *sw_config;
6710         u16 next_seid = 0;
6711         int ret = 0;
6712         u8 *aq_buf;
6713         int i;
6714
6715         aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
6716         if (!aq_buf)
6717                 return -ENOMEM;
6718
6719         sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
6720         do {
6721                 u16 num_reported, num_total;
6722
6723                 ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
6724                                                 I40E_AQ_LARGE_BUF,
6725                                                 &next_seid, NULL);
6726                 if (ret) {
6727                         dev_info(&pf->pdev->dev,
6728                                  "get switch config failed %d aq_err=%x\n",
6729                                  ret, pf->hw.aq.asq_last_status);
6730                         kfree(aq_buf);
6731                         return -ENOENT;
6732                 }
6733
6734                 num_reported = le16_to_cpu(sw_config->header.num_reported);
6735                 num_total = le16_to_cpu(sw_config->header.num_total);
6736
6737                 if (printconfig)
6738                         dev_info(&pf->pdev->dev,
6739                                  "header: %d reported %d total\n",
6740                                  num_reported, num_total);
6741
6742                 if (num_reported) {
6743                         int sz = sizeof(*sw_config) * num_reported;
6744
6745                         kfree(pf->sw_config);
6746                         pf->sw_config = kzalloc(sz, GFP_KERNEL);
6747                         if (pf->sw_config)
6748                                 memcpy(pf->sw_config, sw_config, sz);
6749                 }
6750
6751                 for (i = 0; i < num_reported; i++) {
6752                         struct i40e_aqc_switch_config_element_resp *ele =
6753                                 &sw_config->element[i];
6754
6755                         i40e_setup_pf_switch_element(pf, ele, num_reported,
6756                                                      printconfig);
6757                 }
6758         } while (next_seid != 0);
6759
6760         kfree(aq_buf);
6761         return ret;
6762 }
6763
6764 /**
6765  * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
6766  * @pf: board private structure
6767  *
6768  * Returns 0 on success, negative value on failure
6769  **/
6770 static int i40e_setup_pf_switch(struct i40e_pf *pf)
6771 {
6772         int ret;
6773
6774         /* find out what's out there already */
6775         ret = i40e_fetch_switch_configuration(pf, false);
6776         if (ret) {
6777                 dev_info(&pf->pdev->dev,
6778                          "couldn't fetch switch config, err %d, aq_err %d\n",
6779                          ret, pf->hw.aq.asq_last_status);
6780                 return ret;
6781         }
6782         i40e_pf_reset_stats(pf);
6783
6784         /* fdir VSI must happen first to be sure it gets queue 0, but only
6785          * if there is enough room for the fdir VSI
6786          */
6787         if (pf->num_lan_qps > 1)
6788                 i40e_fdir_setup(pf);
6789
6790         /* first time setup */
6791         if (pf->lan_vsi == I40E_NO_VSI) {
6792                 struct i40e_vsi *vsi = NULL;
6793                 u16 uplink_seid;
6794
6795                 /* Set up the PF VSI associated with the PF's main VSI
6796                  * that is already in the HW switch
6797                  */
6798                 if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
6799                         uplink_seid = pf->veb[pf->lan_veb]->seid;
6800                 else
6801                         uplink_seid = pf->mac_seid;
6802
6803                 vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN, uplink_seid, 0);
6804                 if (!vsi) {
6805                         dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
6806                         i40e_fdir_teardown(pf);
6807                         return -EAGAIN;
6808                 }
6809                 /* accommodate kcompat by copying the main VSI queue count
6810                  * into the pf, since this newer code pushes the pf queue
6811                  * info down a level into a VSI
6812                  */
6813                 pf->num_rx_queues = vsi->alloc_queue_pairs;
6814                 pf->num_tx_queues = vsi->alloc_queue_pairs;
6815         } else {
6816                 /* force a reset of TC and queue layout configurations */
6817                 u8 enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
6818                 pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
6819                 pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
6820                 i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
6821         }
6822         i40e_vlan_stripping_disable(pf->vsi[pf->lan_vsi]);
6823
6824         /* Setup static PF queue filter control settings */
6825         ret = i40e_setup_pf_filter_control(pf);
6826         if (ret) {
6827                 dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
6828                          ret);
6829                 /* Failure here should not stop continuing other steps */
6830         }
6831
6832         /* enable RSS in the HW, even for only one queue, as the stack can use
6833          * the hash
6834          */
6835         if ((pf->flags & I40E_FLAG_RSS_ENABLED))
6836                 i40e_config_rss(pf);
6837
6838         /* fill in link information and enable LSE reporting */
6839         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
6840         i40e_link_event(pf);
6841
6842         /* Initialize user-specifics link properties */
6843         pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
6844                                   I40E_AQ_AN_COMPLETED) ? true : false);
6845         pf->hw.fc.requested_mode = I40E_FC_DEFAULT;
6846         if (pf->hw.phy.link_info.an_info &
6847            (I40E_AQ_LINK_PAUSE_TX | I40E_AQ_LINK_PAUSE_RX))
6848                 pf->hw.fc.current_mode = I40E_FC_FULL;
6849         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX)
6850                 pf->hw.fc.current_mode = I40E_FC_TX_PAUSE;
6851         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX)
6852                 pf->hw.fc.current_mode = I40E_FC_RX_PAUSE;
6853         else
6854                 pf->hw.fc.current_mode = I40E_FC_DEFAULT;
6855
6856         return ret;
6857 }
6858
6859 /**
6860  * i40e_set_rss_size - helper to set rss_size
6861  * @pf: board private structure
6862  * @queues_left: how many queues
6863  */
6864 static u16 i40e_set_rss_size(struct i40e_pf *pf, int queues_left)
6865 {
6866         int num_tc0;
6867
6868         num_tc0 = min_t(int, queues_left, pf->rss_size_max);
6869         num_tc0 = min_t(int, num_tc0, nr_cpus_node(numa_node_id()));
6870         num_tc0 = rounddown_pow_of_two(num_tc0);
6871
6872         return num_tc0;
6873 }
6874
6875 /**
6876  * i40e_determine_queue_usage - Work out queue distribution
6877  * @pf: board private structure
6878  **/
6879 static void i40e_determine_queue_usage(struct i40e_pf *pf)
6880 {
6881         int accum_tc_size;
6882         int queues_left;
6883
6884         pf->num_lan_qps = 0;
6885         pf->num_tc_qps = rounddown_pow_of_two(pf->num_tc_qps);
6886         accum_tc_size = (I40E_MAX_TRAFFIC_CLASS - 1) * pf->num_tc_qps;
6887
6888         /* Find the max queues to be put into basic use.  We'll always be
6889          * using TC0, whether or not DCB is running, and TC0 will get the
6890          * big RSS set.
6891          */
6892         queues_left = pf->hw.func_caps.num_tx_qp;
6893
6894         if   (!((pf->flags & I40E_FLAG_MSIX_ENABLED)             &&
6895                 (pf->flags & I40E_FLAG_MQ_ENABLED))              ||
6896                 !(pf->flags & (I40E_FLAG_RSS_ENABLED |
6897                 I40E_FLAG_FDIR_ENABLED | I40E_FLAG_DCB_ENABLED)) ||
6898                 (queues_left == 1)) {
6899
6900                 /* one qp for PF, no queues for anything else */
6901                 queues_left = 0;
6902                 pf->rss_size = pf->num_lan_qps = 1;
6903
6904                 /* make sure all the fancies are disabled */
6905                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED       |
6906                                 I40E_FLAG_MQ_ENABLED       |
6907                                 I40E_FLAG_FDIR_ENABLED     |
6908                                 I40E_FLAG_FDIR_ATR_ENABLED |
6909                                 I40E_FLAG_DCB_ENABLED      |
6910                                 I40E_FLAG_SRIOV_ENABLED    |
6911                                 I40E_FLAG_VMDQ_ENABLED);
6912
6913         } else if (pf->flags & I40E_FLAG_RSS_ENABLED      &&
6914                    !(pf->flags & I40E_FLAG_FDIR_ENABLED)  &&
6915                    !(pf->flags & I40E_FLAG_DCB_ENABLED)) {
6916
6917                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
6918
6919                 queues_left -= pf->rss_size;
6920                 pf->num_lan_qps = pf->rss_size;
6921
6922         } else if (pf->flags & I40E_FLAG_RSS_ENABLED      &&
6923                    !(pf->flags & I40E_FLAG_FDIR_ENABLED)  &&
6924                    (pf->flags & I40E_FLAG_DCB_ENABLED)) {
6925
6926                 /* save num_tc_qps queues for TCs 1 thru 7 and the rest
6927                  * are set up for RSS in TC0
6928                  */
6929                 queues_left -= accum_tc_size;
6930
6931                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
6932
6933                 queues_left -= pf->rss_size;
6934                 if (queues_left < 0) {
6935                         dev_info(&pf->pdev->dev, "not enough queues for DCB\n");
6936                         return;
6937                 }
6938
6939                 pf->num_lan_qps = pf->rss_size + accum_tc_size;
6940
6941         } else if (pf->flags & I40E_FLAG_RSS_ENABLED   &&
6942                   (pf->flags & I40E_FLAG_FDIR_ENABLED) &&
6943                   !(pf->flags & I40E_FLAG_DCB_ENABLED)) {
6944
6945                 queues_left -= 1; /* save 1 queue for FD */
6946
6947                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
6948
6949                 queues_left -= pf->rss_size;
6950                 if (queues_left < 0) {
6951                         dev_info(&pf->pdev->dev, "not enough queues for Flow Director\n");
6952                         return;
6953                 }
6954
6955                 pf->num_lan_qps = pf->rss_size;
6956
6957         } else if (pf->flags & I40E_FLAG_RSS_ENABLED   &&
6958                   (pf->flags & I40E_FLAG_FDIR_ENABLED) &&
6959                   (pf->flags & I40E_FLAG_DCB_ENABLED)) {
6960
6961                 /* save 1 queue for TCs 1 thru 7,
6962                  * 1 queue for flow director,
6963                  * and the rest are set up for RSS in TC0
6964                  */
6965                 queues_left -= 1;
6966                 queues_left -= accum_tc_size;
6967
6968                 pf->rss_size = i40e_set_rss_size(pf, queues_left);
6969                 queues_left -= pf->rss_size;
6970                 if (queues_left < 0) {
6971                         dev_info(&pf->pdev->dev, "not enough queues for DCB and Flow Director\n");
6972                         return;
6973                 }
6974
6975                 pf->num_lan_qps = pf->rss_size + accum_tc_size;
6976
6977         } else {
6978                 dev_info(&pf->pdev->dev,
6979                          "Invalid configuration, flags=0x%08llx\n", pf->flags);
6980                 return;
6981         }
6982
6983         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
6984             pf->num_vf_qps && pf->num_req_vfs && queues_left) {
6985                 pf->num_req_vfs = min_t(int, pf->num_req_vfs, (queues_left /
6986                                                                pf->num_vf_qps));
6987                 queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
6988         }
6989
6990         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
6991             pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
6992                 pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
6993                                           (queues_left / pf->num_vmdq_qps));
6994                 queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
6995         }
6996
6997         return;
6998 }
6999
7000 /**
7001  * i40e_setup_pf_filter_control - Setup PF static filter control
7002  * @pf: PF to be setup
7003  *
7004  * i40e_setup_pf_filter_control sets up a pf's initial filter control
7005  * settings. If PE/FCoE are enabled then it will also set the per PF
7006  * based filter sizes required for them. It also enables Flow director,
7007  * ethertype and macvlan type filter settings for the pf.
7008  *
7009  * Returns 0 on success, negative on failure
7010  **/
7011 static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
7012 {
7013         struct i40e_filter_control_settings *settings = &pf->filter_settings;
7014
7015         settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;
7016
7017         /* Flow Director is enabled */
7018         if (pf->flags & (I40E_FLAG_FDIR_ENABLED | I40E_FLAG_FDIR_ATR_ENABLED))
7019                 settings->enable_fdir = true;
7020
7021         /* Ethtype and MACVLAN filters enabled for PF */
7022         settings->enable_ethtype = true;
7023         settings->enable_macvlan = true;
7024
7025         if (i40e_set_filter_control(&pf->hw, settings))
7026                 return -ENOENT;
7027
7028         return 0;
7029 }
7030
7031 /**
7032  * i40e_probe - Device initialization routine
7033  * @pdev: PCI device information struct
7034  * @ent: entry in i40e_pci_tbl
7035  *
7036  * i40e_probe initializes a pf identified by a pci_dev structure.
7037  * The OS initialization, configuring of the pf private structure,
7038  * and a hardware reset occur.
7039  *
7040  * Returns 0 on success, negative on failure
7041  **/
7042 static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7043 {
7044         struct i40e_driver_version dv;
7045         struct i40e_pf *pf;
7046         struct i40e_hw *hw;
7047         int err = 0;
7048         u32 len;
7049
7050         err = pci_enable_device_mem(pdev);
7051         if (err)
7052                 return err;
7053
7054         /* set up for high or low dma */
7055         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7056                 /* coherent mask for the same size will always succeed if
7057                  * dma_set_mask does
7058                  */
7059                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
7060         } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
7061                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
7062         } else {
7063                 dev_err(&pdev->dev, "DMA configuration failed: %d\n", err);
7064                 err = -EIO;
7065                 goto err_dma;
7066         }
7067
7068         /* set up pci connections */
7069         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7070                                            IORESOURCE_MEM), i40e_driver_name);
7071         if (err) {
7072                 dev_info(&pdev->dev,
7073                          "pci_request_selected_regions failed %d\n", err);
7074                 goto err_pci_reg;
7075         }
7076
7077         pci_enable_pcie_error_reporting(pdev);
7078         pci_set_master(pdev);
7079
7080         /* Now that we have a PCI connection, we need to do the
7081          * low level device setup.  This is primarily setting up
7082          * the Admin Queue structures and then querying for the
7083          * device's current profile information.
7084          */
7085         pf = kzalloc(sizeof(*pf), GFP_KERNEL);
7086         if (!pf) {
7087                 err = -ENOMEM;
7088                 goto err_pf_alloc;
7089         }
7090         pf->next_vsi = 0;
7091         pf->pdev = pdev;
7092         set_bit(__I40E_DOWN, &pf->state);
7093
7094         hw = &pf->hw;
7095         hw->back = pf;
7096         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7097                               pci_resource_len(pdev, 0));
7098         if (!hw->hw_addr) {
7099                 err = -EIO;
7100                 dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
7101                          (unsigned int)pci_resource_start(pdev, 0),
7102                          (unsigned int)pci_resource_len(pdev, 0), err);
7103                 goto err_ioremap;
7104         }
7105         hw->vendor_id = pdev->vendor;
7106         hw->device_id = pdev->device;
7107         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
7108         hw->subsystem_vendor_id = pdev->subsystem_vendor;
7109         hw->subsystem_device_id = pdev->subsystem_device;
7110         hw->bus.device = PCI_SLOT(pdev->devfn);
7111         hw->bus.func = PCI_FUNC(pdev->devfn);
7112
7113         /* Reset here to make sure all is clean and to define PF 'n' */
7114         err = i40e_pf_reset(hw);
7115         if (err) {
7116                 dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
7117                 goto err_pf_reset;
7118         }
7119         pf->pfr_count++;
7120
7121         hw->aq.num_arq_entries = I40E_AQ_LEN;
7122         hw->aq.num_asq_entries = I40E_AQ_LEN;
7123         hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
7124         hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
7125         pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;
7126         snprintf(pf->misc_int_name, sizeof(pf->misc_int_name) - 1,
7127                  "%s-pf%d:misc",
7128                  dev_driver_string(&pf->pdev->dev), pf->hw.pf_id);
7129
7130         err = i40e_init_shared_code(hw);
7131         if (err) {
7132                 dev_info(&pdev->dev, "init_shared_code failed: %d\n", err);
7133                 goto err_pf_reset;
7134         }
7135
7136         err = i40e_init_adminq(hw);
7137         dev_info(&pdev->dev, "%s\n", i40e_fw_version_str(hw));
7138         if (err) {
7139                 dev_info(&pdev->dev,
7140                          "init_adminq failed: %d expecting API %02x.%02x\n",
7141                          err,
7142                          I40E_FW_API_VERSION_MAJOR, I40E_FW_API_VERSION_MINOR);
7143                 goto err_pf_reset;
7144         }
7145
7146         err = i40e_get_capabilities(pf);
7147         if (err)
7148                 goto err_adminq_setup;
7149
7150         err = i40e_sw_init(pf);
7151         if (err) {
7152                 dev_info(&pdev->dev, "sw_init failed: %d\n", err);
7153                 goto err_sw_init;
7154         }
7155
7156         err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
7157                                 hw->func_caps.num_rx_qp,
7158                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
7159         if (err) {
7160                 dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
7161                 goto err_init_lan_hmc;
7162         }
7163
7164         err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
7165         if (err) {
7166                 dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
7167                 err = -ENOENT;
7168                 goto err_configure_lan_hmc;
7169         }
7170
7171         i40e_get_mac_addr(hw, hw->mac.addr);
7172         if (i40e_validate_mac_addr(hw->mac.addr)) {
7173                 dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
7174                 err = -EIO;
7175                 goto err_mac_addr;
7176         }
7177         dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
7178         memcpy(hw->mac.perm_addr, hw->mac.addr, ETH_ALEN);
7179
7180         pci_set_drvdata(pdev, pf);
7181         pci_save_state(pdev);
7182
7183         /* set up periodic task facility */
7184         setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
7185         pf->service_timer_period = HZ;
7186
7187         INIT_WORK(&pf->service_task, i40e_service_task);
7188         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
7189         pf->flags |= I40E_FLAG_NEED_LINK_UPDATE;
7190         pf->link_check_timeout = jiffies;
7191
7192         /* set up the main switch operations */
7193         i40e_determine_queue_usage(pf);
7194         i40e_init_interrupt_scheme(pf);
7195
7196         /* Set up the *vsi struct based on the number of VSIs in the HW,
7197          * and set up our local tracking of the MAIN PF vsi.
7198          */
7199         len = sizeof(struct i40e_vsi *) * pf->hw.func_caps.num_vsis;
7200         pf->vsi = kzalloc(len, GFP_KERNEL);
7201         if (!pf->vsi)
7202                 goto err_switch_setup;
7203
7204         err = i40e_setup_pf_switch(pf);
7205         if (err) {
7206                 dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
7207                 goto err_vsis;
7208         }
7209
7210         /* The main driver is (mostly) up and happy. We need to set this state
7211          * before setting up the misc vector or we get a race and the vector
7212          * ends up disabled forever.
7213          */
7214         clear_bit(__I40E_DOWN, &pf->state);
7215
7216         /* In case of MSIX we are going to setup the misc vector right here
7217          * to handle admin queue events etc. In case of legacy and MSI
7218          * the misc functionality and queue processing is combined in
7219          * the same vector and that gets setup at open.
7220          */
7221         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
7222                 err = i40e_setup_misc_vector(pf);
7223                 if (err) {
7224                         dev_info(&pdev->dev,
7225                                  "setup of misc vector failed: %d\n", err);
7226                         goto err_vsis;
7227                 }
7228         }
7229
7230         /* prep for VF support */
7231         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
7232             (pf->flags & I40E_FLAG_MSIX_ENABLED)) {
7233                 u32 val;
7234
7235                 /* disable link interrupts for VFs */
7236                 val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
7237                 val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
7238                 wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
7239                 i40e_flush(hw);
7240         }
7241
7242         i40e_dbg_pf_init(pf);
7243
7244         /* tell the firmware that we're starting */
7245         dv.major_version = DRV_VERSION_MAJOR;
7246         dv.minor_version = DRV_VERSION_MINOR;
7247         dv.build_version = DRV_VERSION_BUILD;
7248         dv.subbuild_version = 0;
7249         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
7250
7251         /* since everything's happy, start the service_task timer */
7252         mod_timer(&pf->service_timer,
7253                   round_jiffies(jiffies + pf->service_timer_period));
7254
7255         return 0;
7256
7257         /* Unwind what we've done if something failed in the setup */
7258 err_vsis:
7259         set_bit(__I40E_DOWN, &pf->state);
7260 err_switch_setup:
7261         i40e_clear_interrupt_scheme(pf);
7262         kfree(pf->vsi);
7263         del_timer_sync(&pf->service_timer);
7264 err_mac_addr:
7265 err_configure_lan_hmc:
7266         (void)i40e_shutdown_lan_hmc(hw);
7267 err_init_lan_hmc:
7268         kfree(pf->qp_pile);
7269         kfree(pf->irq_pile);
7270 err_sw_init:
7271 err_adminq_setup:
7272         (void)i40e_shutdown_adminq(hw);
7273 err_pf_reset:
7274         iounmap(hw->hw_addr);
7275 err_ioremap:
7276         kfree(pf);
7277 err_pf_alloc:
7278         pci_disable_pcie_error_reporting(pdev);
7279         pci_release_selected_regions(pdev,
7280                                      pci_select_bars(pdev, IORESOURCE_MEM));
7281 err_pci_reg:
7282 err_dma:
7283         pci_disable_device(pdev);
7284         return err;
7285 }
7286
7287 /**
7288  * i40e_remove - Device removal routine
7289  * @pdev: PCI device information struct
7290  *
7291  * i40e_remove is called by the PCI subsystem to alert the driver
7292  * that is should release a PCI device.  This could be caused by a
7293  * Hot-Plug event, or because the driver is going to be removed from
7294  * memory.
7295  **/
7296 static void i40e_remove(struct pci_dev *pdev)
7297 {
7298         struct i40e_pf *pf = pci_get_drvdata(pdev);
7299         i40e_status ret_code;
7300         u32 reg;
7301         int i;
7302
7303         i40e_dbg_pf_exit(pf);
7304
7305         if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
7306                 i40e_free_vfs(pf);
7307                 pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
7308         }
7309
7310         /* no more scheduling of any task */
7311         set_bit(__I40E_DOWN, &pf->state);
7312         del_timer_sync(&pf->service_timer);
7313         cancel_work_sync(&pf->service_task);
7314
7315         i40e_fdir_teardown(pf);
7316
7317         /* If there is a switch structure or any orphans, remove them.
7318          * This will leave only the PF's VSI remaining.
7319          */
7320         for (i = 0; i < I40E_MAX_VEB; i++) {
7321                 if (!pf->veb[i])
7322                         continue;
7323
7324                 if (pf->veb[i]->uplink_seid == pf->mac_seid ||
7325                     pf->veb[i]->uplink_seid == 0)
7326                         i40e_switch_branch_release(pf->veb[i]);
7327         }
7328
7329         /* Now we can shutdown the PF's VSI, just before we kill
7330          * adminq and hmc.
7331          */
7332         if (pf->vsi[pf->lan_vsi])
7333                 i40e_vsi_release(pf->vsi[pf->lan_vsi]);
7334
7335         i40e_stop_misc_vector(pf);
7336         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
7337                 synchronize_irq(pf->msix_entries[0].vector);
7338                 free_irq(pf->msix_entries[0].vector, pf);
7339         }
7340
7341         /* shutdown and destroy the HMC */
7342         ret_code = i40e_shutdown_lan_hmc(&pf->hw);
7343         if (ret_code)
7344                 dev_warn(&pdev->dev,
7345                          "Failed to destroy the HMC resources: %d\n", ret_code);
7346
7347         /* shutdown the adminq */
7348         i40e_aq_queue_shutdown(&pf->hw, true);
7349         ret_code = i40e_shutdown_adminq(&pf->hw);
7350         if (ret_code)
7351                 dev_warn(&pdev->dev,
7352                          "Failed to destroy the Admin Queue resources: %d\n",
7353                          ret_code);
7354
7355         /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
7356         i40e_clear_interrupt_scheme(pf);
7357         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7358                 if (pf->vsi[i]) {
7359                         i40e_vsi_clear_rings(pf->vsi[i]);
7360                         i40e_vsi_clear(pf->vsi[i]);
7361                         pf->vsi[i] = NULL;
7362                 }
7363         }
7364
7365         for (i = 0; i < I40E_MAX_VEB; i++) {
7366                 kfree(pf->veb[i]);
7367                 pf->veb[i] = NULL;
7368         }
7369
7370         kfree(pf->qp_pile);
7371         kfree(pf->irq_pile);
7372         kfree(pf->sw_config);
7373         kfree(pf->vsi);
7374
7375         /* force a PF reset to clean anything leftover */
7376         reg = rd32(&pf->hw, I40E_PFGEN_CTRL);
7377         wr32(&pf->hw, I40E_PFGEN_CTRL, (reg | I40E_PFGEN_CTRL_PFSWR_MASK));
7378         i40e_flush(&pf->hw);
7379
7380         iounmap(pf->hw.hw_addr);
7381         kfree(pf);
7382         pci_release_selected_regions(pdev,
7383                                      pci_select_bars(pdev, IORESOURCE_MEM));
7384
7385         pci_disable_pcie_error_reporting(pdev);
7386         pci_disable_device(pdev);
7387 }
7388
7389 /**
7390  * i40e_pci_error_detected - warning that something funky happened in PCI land
7391  * @pdev: PCI device information struct
7392  *
7393  * Called to warn that something happened and the error handling steps
7394  * are in progress.  Allows the driver to quiesce things, be ready for
7395  * remediation.
7396  **/
7397 static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
7398                                                 enum pci_channel_state error)
7399 {
7400         struct i40e_pf *pf = pci_get_drvdata(pdev);
7401
7402         dev_info(&pdev->dev, "%s: error %d\n", __func__, error);
7403
7404         /* shutdown all operations */
7405         i40e_pf_quiesce_all_vsi(pf);
7406
7407         /* Request a slot reset */
7408         return PCI_ERS_RESULT_NEED_RESET;
7409 }
7410
7411 /**
7412  * i40e_pci_error_slot_reset - a PCI slot reset just happened
7413  * @pdev: PCI device information struct
7414  *
7415  * Called to find if the driver can work with the device now that
7416  * the pci slot has been reset.  If a basic connection seems good
7417  * (registers are readable and have sane content) then return a
7418  * happy little PCI_ERS_RESULT_xxx.
7419  **/
7420 static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
7421 {
7422         struct i40e_pf *pf = pci_get_drvdata(pdev);
7423         pci_ers_result_t result;
7424         int err;
7425         u32 reg;
7426
7427         dev_info(&pdev->dev, "%s\n", __func__);
7428         if (pci_enable_device_mem(pdev)) {
7429                 dev_info(&pdev->dev,
7430                          "Cannot re-enable PCI device after reset.\n");
7431                 result = PCI_ERS_RESULT_DISCONNECT;
7432         } else {
7433                 pci_set_master(pdev);
7434                 pci_restore_state(pdev);
7435                 pci_save_state(pdev);
7436                 pci_wake_from_d3(pdev, false);
7437
7438                 reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
7439                 if (reg == 0)
7440                         result = PCI_ERS_RESULT_RECOVERED;
7441                 else
7442                         result = PCI_ERS_RESULT_DISCONNECT;
7443         }
7444
7445         err = pci_cleanup_aer_uncorrect_error_status(pdev);
7446         if (err) {
7447                 dev_info(&pdev->dev,
7448                          "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
7449                          err);
7450                 /* non-fatal, continue */
7451         }
7452
7453         return result;
7454 }
7455
7456 /**
7457  * i40e_pci_error_resume - restart operations after PCI error recovery
7458  * @pdev: PCI device information struct
7459  *
7460  * Called to allow the driver to bring things back up after PCI error
7461  * and/or reset recovery has finished.
7462  **/
7463 static void i40e_pci_error_resume(struct pci_dev *pdev)
7464 {
7465         struct i40e_pf *pf = pci_get_drvdata(pdev);
7466
7467         dev_info(&pdev->dev, "%s\n", __func__);
7468         i40e_handle_reset_warning(pf);
7469 }
7470
7471 static const struct pci_error_handlers i40e_err_handler = {
7472         .error_detected = i40e_pci_error_detected,
7473         .slot_reset = i40e_pci_error_slot_reset,
7474         .resume = i40e_pci_error_resume,
7475 };
7476
7477 static struct pci_driver i40e_driver = {
7478         .name     = i40e_driver_name,
7479         .id_table = i40e_pci_tbl,
7480         .probe    = i40e_probe,
7481         .remove   = i40e_remove,
7482         .err_handler = &i40e_err_handler,
7483         .sriov_configure = i40e_pci_sriov_configure,
7484 };
7485
7486 /**
7487  * i40e_init_module - Driver registration routine
7488  *
7489  * i40e_init_module is the first routine called when the driver is
7490  * loaded. All it does is register with the PCI subsystem.
7491  **/
7492 static int __init i40e_init_module(void)
7493 {
7494         pr_info("%s: %s - version %s\n", i40e_driver_name,
7495                 i40e_driver_string, i40e_driver_version_str);
7496         pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);
7497         i40e_dbg_init();
7498         return pci_register_driver(&i40e_driver);
7499 }
7500 module_init(i40e_init_module);
7501
7502 /**
7503  * i40e_exit_module - Driver exit cleanup routine
7504  *
7505  * i40e_exit_module is called just before the driver is removed
7506  * from memory.
7507  **/
7508 static void __exit i40e_exit_module(void)
7509 {
7510         pci_unregister_driver(&i40e_driver);
7511         i40e_dbg_exit();
7512 }
7513 module_exit(i40e_exit_module);