drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/in.h>
  63 #include <linux/ip.h>
  64 #include <linux/ipv6.h>
  65 #include <linux/irq.h>
  66 #include <linux/kthread.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/debugfs.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/seq_file.h>
  78 #include <linux/workqueue.h>
  79
  80 #include "ibmvnic.h"
  81
  82 static const char ibmvnic_driver_name[] = "ibmvnic";
  83 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  84
  85 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  86 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  87 MODULE_LICENSE("GPL");
  88 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  89
  90 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  91 static int ibmvnic_remove(struct vio_dev *);
  92 static void release_sub_crqs(struct ibmvnic_adapter *);
  93 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 114
 115 struct ibmvnic_stat {
 116         char name[ETH_GSTRING_LEN];
 117         int offset;
 118 };
 119
 120 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 121                              offsetof(struct ibmvnic_statistics, stat))
 122 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 123
 124 static const struct ibmvnic_stat ibmvnic_stats[] = {
 125         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 126         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 127         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 128         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 129         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 130         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 131         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 132         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 133         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 134         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 135         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 136         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 137         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 138         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 139         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 140         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 141         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 142         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 143         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 144         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 145         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 146         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 147 };
 148
 149 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 150                           unsigned long length, unsigned long *number,
 151                           unsigned long *irq)
 152 {
 153         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 154         long rc;
 155
 156         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 157         *number = retbuf[0];
 158         *irq = retbuf[1];
 159
 160         return rc;
 161 }
 162
 163 /* net_device_ops functions */
 164
 165 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 166                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 167                          int buff_size, int active)
 168 {
 169         netdev_dbg(adapter->netdev,
 170                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 171                    index, num, buff_size);
 172         rx_pool->size = num;
 173         rx_pool->index = index;
 174         rx_pool->buff_size = buff_size;
 175         rx_pool->active = active;
 176 }
 177
 178 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 179                                 struct ibmvnic_long_term_buff *ltb, int size)
 180 {
 181         struct device *dev = &adapter->vdev->dev;
 182
 183         ltb->size = size;
 184         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 185                                        GFP_KERNEL);
 186
 187         if (!ltb->buff) {
 188                 dev_err(dev, "Couldn't alloc long term buffer\n");
 189                 return -ENOMEM;
 190         }
 191         ltb->map_id = adapter->map_id;
 192         adapter->map_id++;
 193         send_request_map(adapter, ltb->addr,
 194                          ltb->size, ltb->map_id);
 195         init_completion(&adapter->fw_done);
 196         wait_for_completion(&adapter->fw_done);
 197         return 0;
 198 }
 199
 200 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 201                                 struct ibmvnic_long_term_buff *ltb)
 202 {
 203         struct device *dev = &adapter->vdev->dev;
 204
 205         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 206         send_request_unmap(adapter, ltb->map_id);
 207 }
 208
 209 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
 210                          struct ibmvnic_rx_pool *pool)
 211 {
 212         struct device *dev = &adapter->vdev->dev;
 213         int i;
 214
 215         pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
 216         if (!pool->free_map)
 217                 return -ENOMEM;
 218
 219         pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
 220                                 GFP_KERNEL);
 221
 222         if (!pool->rx_buff) {
 223                 dev_err(dev, "Couldn't alloc rx buffers\n");
 224                 kfree(pool->free_map);
 225                 return -ENOMEM;
 226         }
 227
 228         if (alloc_long_term_buff(adapter, &pool->long_term_buff,
 229                                  pool->size * pool->buff_size)) {
 230                 kfree(pool->free_map);
 231                 kfree(pool->rx_buff);
 232                 return -ENOMEM;
 233         }
 234
 235         for (i = 0; i < pool->size; ++i)
 236                 pool->free_map[i] = i;
 237
 238         atomic_set(&pool->available, 0);
 239         pool->next_alloc = 0;
 240         pool->next_free = 0;
 241
 242         return 0;
 243 }
 244
 245 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 246                               struct ibmvnic_rx_pool *pool)
 247 {
 248         int count = pool->size - atomic_read(&pool->available);
 249         struct device *dev = &adapter->vdev->dev;
 250         int buffers_added = 0;
 251         unsigned long lpar_rc;
 252         union sub_crq sub_crq;
 253         struct sk_buff *skb;
 254         unsigned int offset;
 255         dma_addr_t dma_addr;
 256         unsigned char *dst;
 257         u64 *handle_array;
 258         int shift = 0;
 259         int index;
 260         int i;
 261
 262         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 263                                       be32_to_cpu(adapter->login_rsp_buf->
 264                                       off_rxadd_subcrqs));
 265
 266         for (i = 0; i < count; ++i) {
 267                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 268                 if (!skb) {
 269                         dev_err(dev, "Couldn't replenish rx buff\n");
 270                         adapter->replenish_no_mem++;
 271                         break;
 272                 }
 273
 274                 index = pool->free_map[pool->next_free];
 275
 276                 if (pool->rx_buff[index].skb)
 277                         dev_err(dev, "Inconsistent free_map!\n");
 278
 279                 /* Copy the skb to the long term mapped DMA buffer */
 280                 offset = index * pool->buff_size;
 281                 dst = pool->long_term_buff.buff + offset;
 282                 memset(dst, 0, pool->buff_size);
 283                 dma_addr = pool->long_term_buff.addr + offset;
 284                 pool->rx_buff[index].data = dst;
 285
 286                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 287                 pool->rx_buff[index].dma = dma_addr;
 288                 pool->rx_buff[index].skb = skb;
 289                 pool->rx_buff[index].pool_index = pool->index;
 290                 pool->rx_buff[index].size = pool->buff_size;
 291
 292                 memset(&sub_crq, 0, sizeof(sub_crq));
 293                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 294                 sub_crq.rx_add.correlator =
 295                     cpu_to_be64((u64)&pool->rx_buff[index]);
 296                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 297                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 298
 299                 /* The length field of the sCRQ is defined to be 24 bits so the
 300                  * buffer size needs to be left shifted by a byte before it is
 301                  * converted to big endian to prevent the last byte from being
 302                  * truncated.
 303                  */
 304 #ifdef __LITTLE_ENDIAN__
 305                 shift = 8;
 306 #endif
 307                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 308
 309                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 310                                       &sub_crq);
 311                 if (lpar_rc != H_SUCCESS)
 312                         goto failure;
 313
 314                 buffers_added++;
 315                 adapter->replenish_add_buff_success++;
 316                 pool->next_free = (pool->next_free + 1) % pool->size;
 317         }
 318         atomic_add(buffers_added, &pool->available);
 319         return;
 320
 321 failure:
 322         dev_info(dev, "replenish pools failure\n");
 323         pool->free_map[pool->next_free] = index;
 324         pool->rx_buff[index].skb = NULL;
 325         if (!dma_mapping_error(dev, dma_addr))
 326                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 327                                  DMA_FROM_DEVICE);
 328
 329         dev_kfree_skb_any(skb);
 330         adapter->replenish_add_buff_failure++;
 331         atomic_add(buffers_added, &pool->available);
 332 }
 333
 334 static void replenish_pools(struct ibmvnic_adapter *adapter)
 335 {
 336         int i;
 337
 338         if (adapter->migrated)
 339                 return;
 340
 341         adapter->replenish_task_cycles++;
 342         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 343              i++) {
 344                 if (adapter->rx_pool[i].active)
 345                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 346         }
 347 }
 348
 349 static void free_rx_pool(struct ibmvnic_adapter *adapter,
 350                          struct ibmvnic_rx_pool *pool)
 351 {
 352         int i;
 353
 354         kfree(pool->free_map);
 355         pool->free_map = NULL;
 356
 357         if (!pool->rx_buff)
 358                 return;
 359
 360         for (i = 0; i < pool->size; i++) {
 361                 if (pool->rx_buff[i].skb) {
 362                         dev_kfree_skb_any(pool->rx_buff[i].skb);
 363                         pool->rx_buff[i].skb = NULL;
 364                 }
 365         }
 366         kfree(pool->rx_buff);
 367         pool->rx_buff = NULL;
 368 }
 369
 370 static int ibmvnic_open(struct net_device *netdev)
 371 {
 372         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 373         struct device *dev = &adapter->vdev->dev;
 374         struct ibmvnic_tx_pool *tx_pool;
 375         union ibmvnic_crq crq;
 376         int rxadd_subcrqs;
 377         u64 *size_array;
 378         int tx_subcrqs;
 379         int i, j;
 380
 381         rxadd_subcrqs =
 382             be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 383         tx_subcrqs =
 384             be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 385         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 386                                   be32_to_cpu(adapter->login_rsp_buf->
 387                                               off_rxadd_buff_size));
 388         adapter->map_id = 1;
 389         adapter->napi = kcalloc(adapter->req_rx_queues,
 390                                 sizeof(struct napi_struct), GFP_KERNEL);
 391         if (!adapter->napi)
 392                 goto alloc_napi_failed;
 393         for (i = 0; i < adapter->req_rx_queues; i++) {
 394                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 395                                NAPI_POLL_WEIGHT);
 396                 napi_enable(&adapter->napi[i]);
 397         }
 398         adapter->rx_pool =
 399             kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
 400
 401         if (!adapter->rx_pool)
 402                 goto rx_pool_arr_alloc_failed;
 403         send_map_query(adapter);
 404         for (i = 0; i < rxadd_subcrqs; i++) {
 405                 init_rx_pool(adapter, &adapter->rx_pool[i],
 406                              IBMVNIC_BUFFS_PER_POOL, i,
 407                              be64_to_cpu(size_array[i]), 1);
 408                 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
 409                         dev_err(dev, "Couldn't alloc rx pool\n");
 410                         goto rx_pool_alloc_failed;
 411                 }
 412         }
 413         adapter->tx_pool =
 414             kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 415
 416         if (!adapter->tx_pool)
 417                 goto tx_pool_arr_alloc_failed;
 418         for (i = 0; i < tx_subcrqs; i++) {
 419                 tx_pool = &adapter->tx_pool[i];
 420                 tx_pool->tx_buff =
 421                     kcalloc(adapter->max_tx_entries_per_subcrq,
 422                             sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
 423                 if (!tx_pool->tx_buff)
 424                         goto tx_pool_alloc_failed;
 425
 426                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 427                                          adapter->max_tx_entries_per_subcrq *
 428                                          adapter->req_mtu))
 429                         goto tx_ltb_alloc_failed;
 430
 431                 tx_pool->free_map =
 432                     kcalloc(adapter->max_tx_entries_per_subcrq,
 433                             sizeof(int), GFP_KERNEL);
 434                 if (!tx_pool->free_map)
 435                         goto tx_fm_alloc_failed;
 436
 437                 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
 438                         tx_pool->free_map[j] = j;
 439
 440                 tx_pool->consumer_index = 0;
 441                 tx_pool->producer_index = 0;
 442         }
 443         adapter->bounce_buffer_size =
 444             (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
 445         adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
 446                                          GFP_KERNEL);
 447         if (!adapter->bounce_buffer)
 448                 goto bounce_alloc_failed;
 449
 450         adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
 451                                                     adapter->bounce_buffer_size,
 452                                                     DMA_TO_DEVICE);
 453         if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 454                 dev_err(dev, "Couldn't map tx bounce buffer\n");
 455                 goto bounce_map_failed;
 456         }
 457         replenish_pools(adapter);
 458
 459         /* We're ready to receive frames, enable the sub-crq interrupts and
 460          * set the logical link state to up
 461          */
 462         for (i = 0; i < adapter->req_rx_queues; i++)
 463                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 464
 465         for (i = 0; i < adapter->req_tx_queues; i++)
 466                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 467
 468         memset(&crq, 0, sizeof(crq));
 469         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 470         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 471         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
 472         ibmvnic_send_crq(adapter, &crq);
 473
 474         netif_tx_start_all_queues(netdev);
 475
 476         return 0;
 477
 478 bounce_map_failed:
 479         kfree(adapter->bounce_buffer);
 480 bounce_alloc_failed:
 481         i = tx_subcrqs - 1;
 482         kfree(adapter->tx_pool[i].free_map);
 483 tx_fm_alloc_failed:
 484         free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
 485 tx_ltb_alloc_failed:
 486         kfree(adapter->tx_pool[i].tx_buff);
 487 tx_pool_alloc_failed:
 488         for (j = 0; j < i; j++) {
 489                 kfree(adapter->tx_pool[j].tx_buff);
 490                 free_long_term_buff(adapter,
 491                                     &adapter->tx_pool[j].long_term_buff);
 492                 kfree(adapter->tx_pool[j].free_map);
 493         }
 494         kfree(adapter->tx_pool);
 495         adapter->tx_pool = NULL;
 496 tx_pool_arr_alloc_failed:
 497         i = rxadd_subcrqs;
 498 rx_pool_alloc_failed:
 499         for (j = 0; j < i; j++) {
 500                 free_rx_pool(adapter, &adapter->rx_pool[j]);
 501                 free_long_term_buff(adapter,
 502                                     &adapter->rx_pool[j].long_term_buff);
 503         }
 504         kfree(adapter->rx_pool);
 505         adapter->rx_pool = NULL;
 506 rx_pool_arr_alloc_failed:
 507         for (i = 0; i < adapter->req_rx_queues; i++)
 508                 napi_enable(&adapter->napi[i]);
 509 alloc_napi_failed:
 510         return -ENOMEM;
 511 }
 512
 513 static int ibmvnic_close(struct net_device *netdev)
 514 {
 515         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 516         struct device *dev = &adapter->vdev->dev;
 517         union ibmvnic_crq crq;
 518         int i;
 519
 520         adapter->closing = true;
 521
 522         for (i = 0; i < adapter->req_rx_queues; i++)
 523                 napi_disable(&adapter->napi[i]);
 524
 525         netif_tx_stop_all_queues(netdev);
 526
 527         if (adapter->bounce_buffer) {
 528                 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 529                         dma_unmap_single(&adapter->vdev->dev,
 530                                          adapter->bounce_buffer_dma,
 531                                          adapter->bounce_buffer_size,
 532                                          DMA_BIDIRECTIONAL);
 533                         adapter->bounce_buffer_dma = DMA_ERROR_CODE;
 534                 }
 535                 kfree(adapter->bounce_buffer);
 536                 adapter->bounce_buffer = NULL;
 537         }
 538
 539         memset(&crq, 0, sizeof(crq));
 540         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 541         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 542         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
 543         ibmvnic_send_crq(adapter, &crq);
 544
 545         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 546              i++) {
 547                 kfree(adapter->tx_pool[i].tx_buff);
 548                 free_long_term_buff(adapter,
 549                                     &adapter->tx_pool[i].long_term_buff);
 550                 kfree(adapter->tx_pool[i].free_map);
 551         }
 552         kfree(adapter->tx_pool);
 553         adapter->tx_pool = NULL;
 554
 555         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 556              i++) {
 557                 free_rx_pool(adapter, &adapter->rx_pool[i]);
 558                 free_long_term_buff(adapter,
 559                                     &adapter->rx_pool[i].long_term_buff);
 560         }
 561         kfree(adapter->rx_pool);
 562         adapter->rx_pool = NULL;
 563
 564         adapter->closing = false;
 565
 566         return 0;
 567 }
 568
 569 /**
 570  * build_hdr_data - creates L2/L3/L4 header data buffer
 571  * @hdr_field - bitfield determining needed headers
 572  * @skb - socket buffer
 573  * @hdr_len - array of header lengths
 574  * @tot_len - total length of data
 575  *
 576  * Reads hdr_field to determine which headers are needed by firmware.
 577  * Builds a buffer containing these headers.  Saves individual header
 578  * lengths and total buffer length to be used to build descriptors.
 579  */
 580 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 581                           int *hdr_len, u8 *hdr_data)
 582 {
 583         int len = 0;
 584         u8 *hdr;
 585
 586         hdr_len[0] = sizeof(struct ethhdr);
 587
 588         if (skb->protocol == htons(ETH_P_IP)) {
 589                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 590                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 591                         hdr_len[2] = tcp_hdrlen(skb);
 592                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 593                         hdr_len[2] = sizeof(struct udphdr);
 594         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 595                 hdr_len[1] = sizeof(struct ipv6hdr);
 596                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 597                         hdr_len[2] = tcp_hdrlen(skb);
 598                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 599                         hdr_len[2] = sizeof(struct udphdr);
 600         }
 601
 602         memset(hdr_data, 0, 120);
 603         if ((hdr_field >> 6) & 1) {
 604                 hdr = skb_mac_header(skb);
 605                 memcpy(hdr_data, hdr, hdr_len[0]);
 606                 len += hdr_len[0];
 607         }
 608
 609         if ((hdr_field >> 5) & 1) {
 610                 hdr = skb_network_header(skb);
 611                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 612                 len += hdr_len[1];
 613         }
 614
 615         if ((hdr_field >> 4) & 1) {
 616                 hdr = skb_transport_header(skb);
 617                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 618                 len += hdr_len[2];
 619         }
 620         return len;
 621 }
 622
 623 /**
 624  * create_hdr_descs - create header and header extension descriptors
 625  * @hdr_field - bitfield determining needed headers
 626  * @data - buffer containing header data
 627  * @len - length of data buffer
 628  * @hdr_len - array of individual header lengths
 629  * @scrq_arr - descriptor array
 630  *
 631  * Creates header and, if needed, header extension descriptors and
 632  * places them in a descriptor array, scrq_arr
 633  */
 634
 635 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 636                              union sub_crq *scrq_arr)
 637 {
 638         union sub_crq hdr_desc;
 639         int tmp_len = len;
 640         u8 *data, *cur;
 641         int tmp;
 642
 643         while (tmp_len > 0) {
 644                 cur = hdr_data + len - tmp_len;
 645
 646                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 647                 if (cur != hdr_data) {
 648                         data = hdr_desc.hdr_ext.data;
 649                         tmp = tmp_len > 29 ? 29 : tmp_len;
 650                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 651                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 652                         hdr_desc.hdr_ext.len = tmp;
 653                 } else {
 654                         data = hdr_desc.hdr.data;
 655                         tmp = tmp_len > 24 ? 24 : tmp_len;
 656                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 657                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 658                         hdr_desc.hdr.len = tmp;
 659                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 660                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 661                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 662                         hdr_desc.hdr.flag = hdr_field << 1;
 663                 }
 664                 memcpy(data, cur, tmp);
 665                 tmp_len -= tmp;
 666                 *scrq_arr = hdr_desc;
 667                 scrq_arr++;
 668         }
 669 }
 670
 671 /**
 672  * build_hdr_descs_arr - build a header descriptor array
 673  * @skb - socket buffer
 674  * @num_entries - number of descriptors to be sent
 675  * @subcrq - first TX descriptor
 676  * @hdr_field - bit field determining which headers will be sent
 677  *
 678  * This function will build a TX descriptor array with applicable
 679  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 680  */
 681
 682 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 683                                 int *num_entries, u8 hdr_field)
 684 {
 685         int hdr_len[3] = {0, 0, 0};
 686         int tot_len, len;
 687         u8 *hdr_data = txbuff->hdr_data;
 688
 689         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 690                                  txbuff->hdr_data);
 691         len = tot_len;
 692         len -= 24;
 693         if (len > 0)
 694                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 695         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 696                          txbuff->indir_arr + 1);
 697 }
 698
 699 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 700 {
 701         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 702         int queue_num = skb_get_queue_mapping(skb);
 703         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 704         struct device *dev = &adapter->vdev->dev;
 705         struct ibmvnic_tx_buff *tx_buff = NULL;
 706         struct ibmvnic_tx_pool *tx_pool;
 707         unsigned int tx_send_failed = 0;
 708         unsigned int tx_map_failed = 0;
 709         unsigned int tx_dropped = 0;
 710         unsigned int tx_packets = 0;
 711         unsigned int tx_bytes = 0;
 712         dma_addr_t data_dma_addr;
 713         struct netdev_queue *txq;
 714         bool used_bounce = false;
 715         unsigned long lpar_rc;
 716         union sub_crq tx_crq;
 717         unsigned int offset;
 718         int num_entries = 1;
 719         unsigned char *dst;
 720         u64 *handle_array;
 721         int index = 0;
 722         int ret = 0;
 723
 724         tx_pool = &adapter->tx_pool[queue_num];
 725         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 726         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 727                                    be32_to_cpu(adapter->login_rsp_buf->
 728                                                off_txsubm_subcrqs));
 729         if (adapter->migrated) {
 730                 tx_send_failed++;
 731                 tx_dropped++;
 732                 ret = NETDEV_TX_BUSY;
 733                 goto out;
 734         }
 735
 736         index = tx_pool->free_map[tx_pool->consumer_index];
 737         offset = index * adapter->req_mtu;
 738         dst = tx_pool->long_term_buff.buff + offset;
 739         memset(dst, 0, adapter->req_mtu);
 740         skb_copy_from_linear_data(skb, dst, skb->len);
 741         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 742
 743         tx_pool->consumer_index =
 744             (tx_pool->consumer_index + 1) %
 745                 adapter->max_tx_entries_per_subcrq;
 746
 747         tx_buff = &tx_pool->tx_buff[index];
 748         tx_buff->skb = skb;
 749         tx_buff->data_dma[0] = data_dma_addr;
 750         tx_buff->data_len[0] = skb->len;
 751         tx_buff->index = index;
 752         tx_buff->pool_index = queue_num;
 753         tx_buff->last_frag = true;
 754         tx_buff->used_bounce = used_bounce;
 755
 756         memset(&tx_crq, 0, sizeof(tx_crq));
 757         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 758         tx_crq.v1.type = IBMVNIC_TX_DESC;
 759         tx_crq.v1.n_crq_elem = 1;
 760         tx_crq.v1.n_sge = 1;
 761         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 762         tx_crq.v1.correlator = cpu_to_be32(index);
 763         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 764         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 765         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 766
 767         if (adapter->vlan_header_insertion) {
 768                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 769                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 770         }
 771
 772         if (skb->protocol == htons(ETH_P_IP)) {
 773                 if (ip_hdr(skb)->version == 4)
 774                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 775                 else if (ip_hdr(skb)->version == 6)
 776                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 777
 778                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 779                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 780                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 781                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 782         }
 783
 784         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 785                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 786                 hdrs += 2;
 787         }
 788         /* determine if l2/3/4 headers are sent to firmware */
 789         if ((*hdrs >> 7) & 1 &&
 790             (skb->protocol == htons(ETH_P_IP) ||
 791              skb->protocol == htons(ETH_P_IPV6))) {
 792                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 793                 tx_crq.v1.n_crq_elem = num_entries;
 794                 tx_buff->indir_arr[0] = tx_crq;
 795                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 796                                                     sizeof(tx_buff->indir_arr),
 797                                                     DMA_TO_DEVICE);
 798                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 799                         if (!firmware_has_feature(FW_FEATURE_CMO))
 800                                 dev_err(dev, "tx: unable to map descriptor array\n");
 801                         tx_map_failed++;
 802                         tx_dropped++;
 803                         ret = NETDEV_TX_BUSY;
 804                         goto out;
 805                 }
 806                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 807                                                (u64)tx_buff->indir_dma,
 808                                                (u64)num_entries);
 809         } else {
 810                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 811                                       &tx_crq);
 812         }
 813         if (lpar_rc != H_SUCCESS) {
 814                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 815
 816                 if (tx_pool->consumer_index == 0)
 817                         tx_pool->consumer_index =
 818                                 adapter->max_tx_entries_per_subcrq - 1;
 819                 else
 820                         tx_pool->consumer_index--;
 821
 822                 tx_send_failed++;
 823                 tx_dropped++;
 824                 ret = NETDEV_TX_BUSY;
 825                 goto out;
 826         }
 827         tx_packets++;
 828         tx_bytes += skb->len;
 829         txq->trans_start = jiffies;
 830         ret = NETDEV_TX_OK;
 831
 832 out:
 833         netdev->stats.tx_dropped += tx_dropped;
 834         netdev->stats.tx_bytes += tx_bytes;
 835         netdev->stats.tx_packets += tx_packets;
 836         adapter->tx_send_failed += tx_send_failed;
 837         adapter->tx_map_failed += tx_map_failed;
 838
 839         return ret;
 840 }
 841
 842 static void ibmvnic_set_multi(struct net_device *netdev)
 843 {
 844         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 845         struct netdev_hw_addr *ha;
 846         union ibmvnic_crq crq;
 847
 848         memset(&crq, 0, sizeof(crq));
 849         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 850         crq.request_capability.cmd = REQUEST_CAPABILITY;
 851
 852         if (netdev->flags & IFF_PROMISC) {
 853                 if (!adapter->promisc_supported)
 854                         return;
 855         } else {
 856                 if (netdev->flags & IFF_ALLMULTI) {
 857                         /* Accept all multicast */
 858                         memset(&crq, 0, sizeof(crq));
 859                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 860                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 861                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 862                         ibmvnic_send_crq(adapter, &crq);
 863                 } else if (netdev_mc_empty(netdev)) {
 864                         /* Reject all multicast */
 865                         memset(&crq, 0, sizeof(crq));
 866                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 867                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 868                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 869                         ibmvnic_send_crq(adapter, &crq);
 870                 } else {
 871                         /* Accept one or more multicast(s) */
 872                         netdev_for_each_mc_addr(ha, netdev) {
 873                                 memset(&crq, 0, sizeof(crq));
 874                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 875                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 876                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 877                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 878                                                 ha->addr);
 879                                 ibmvnic_send_crq(adapter, &crq);
 880                         }
 881                 }
 882         }
 883 }
 884
 885 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 886 {
 887         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 888         struct sockaddr *addr = p;
 889         union ibmvnic_crq crq;
 890
 891         if (!is_valid_ether_addr(addr->sa_data))
 892                 return -EADDRNOTAVAIL;
 893
 894         memset(&crq, 0, sizeof(crq));
 895         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 896         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 897         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 898         ibmvnic_send_crq(adapter, &crq);
 899         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 900         return 0;
 901 }
 902
 903 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
 904 {
 905         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 906
 907         if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
 908                 return -EINVAL;
 909
 910         netdev->mtu = new_mtu;
 911         return 0;
 912 }
 913
 914 static void ibmvnic_tx_timeout(struct net_device *dev)
 915 {
 916         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 917         int rc;
 918
 919         /* Adapter timed out, resetting it */
 920         release_sub_crqs(adapter);
 921         rc = ibmvnic_reset_crq(adapter);
 922         if (rc)
 923                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 924         else
 925                 ibmvnic_send_crq_init(adapter);
 926 }
 927
 928 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 929                                   struct ibmvnic_rx_buff *rx_buff)
 930 {
 931         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 932
 933         rx_buff->skb = NULL;
 934
 935         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 936         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 937
 938         atomic_dec(&pool->available);
 939 }
 940
 941 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 942 {
 943         struct net_device *netdev = napi->dev;
 944         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 945         int scrq_num = (int)(napi - adapter->napi);
 946         int frames_processed = 0;
 947 restart_poll:
 948         while (frames_processed < budget) {
 949                 struct sk_buff *skb;
 950                 struct ibmvnic_rx_buff *rx_buff;
 951                 union sub_crq *next;
 952                 u32 length;
 953                 u16 offset;
 954                 u8 flags = 0;
 955
 956                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 957                         break;
 958                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 959                 rx_buff =
 960                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 961                                                           rx_comp.correlator);
 962                 /* do error checking */
 963                 if (next->rx_comp.rc) {
 964                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 965                         /* free the entry */
 966                         next->rx_comp.first = 0;
 967                         remove_buff_from_pool(adapter, rx_buff);
 968                         break;
 969                 }
 970
 971                 length = be32_to_cpu(next->rx_comp.len);
 972                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 973                 flags = next->rx_comp.flags;
 974                 skb = rx_buff->skb;
 975                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 976                                         length);
 977                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 978                 /* free the entry */
 979                 next->rx_comp.first = 0;
 980                 remove_buff_from_pool(adapter, rx_buff);
 981
 982                 skb_put(skb, length);
 983                 skb->protocol = eth_type_trans(skb, netdev);
 984
 985                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 986                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 987                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 988                 }
 989
 990                 length = skb->len;
 991                 napi_gro_receive(napi, skb); /* send it up */
 992                 netdev->stats.rx_packets++;
 993                 netdev->stats.rx_bytes += length;
 994                 frames_processed++;
 995         }
 996         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 997
 998         if (frames_processed < budget) {
 999                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1000                 napi_complete(napi);
1001                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1002                     napi_reschedule(napi)) {
1003                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1004                         goto restart_poll;
1005                 }
1006         }
1007         return frames_processed;
1008 }
1009
1010 #ifdef CONFIG_NET_POLL_CONTROLLER
1011 static void ibmvnic_netpoll_controller(struct net_device *dev)
1012 {
1013         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1014         int i;
1015
1016         replenish_pools(netdev_priv(dev));
1017         for (i = 0; i < adapter->req_rx_queues; i++)
1018                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1019                                      adapter->rx_scrq[i]);
1020 }
1021 #endif
1022
1023 static const struct net_device_ops ibmvnic_netdev_ops = {
1024         .ndo_open               = ibmvnic_open,
1025         .ndo_stop               = ibmvnic_close,
1026         .ndo_start_xmit         = ibmvnic_xmit,
1027         .ndo_set_rx_mode        = ibmvnic_set_multi,
1028         .ndo_set_mac_address    = ibmvnic_set_mac,
1029         .ndo_validate_addr      = eth_validate_addr,
1030         .ndo_change_mtu         = ibmvnic_change_mtu,
1031         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1032 #ifdef CONFIG_NET_POLL_CONTROLLER
1033         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1034 #endif
1035 };
1036
1037 /* ethtool functions */
1038
1039 static int ibmvnic_get_settings(struct net_device *netdev,
1040                                 struct ethtool_cmd *cmd)
1041 {
1042         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1043                           SUPPORTED_FIBRE);
1044         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1045                             ADVERTISED_FIBRE);
1046         ethtool_cmd_speed_set(cmd, SPEED_1000);
1047         cmd->duplex = DUPLEX_FULL;
1048         cmd->port = PORT_FIBRE;
1049         cmd->phy_address = 0;
1050         cmd->transceiver = XCVR_INTERNAL;
1051         cmd->autoneg = AUTONEG_ENABLE;
1052         cmd->maxtxpkt = 0;
1053         cmd->maxrxpkt = 1;
1054         return 0;
1055 }
1056
1057 static void ibmvnic_get_drvinfo(struct net_device *dev,
1058                                 struct ethtool_drvinfo *info)
1059 {
1060         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1061         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1062 }
1063
1064 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1065 {
1066         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1067
1068         return adapter->msg_enable;
1069 }
1070
1071 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1072 {
1073         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1074
1075         adapter->msg_enable = data;
1076 }
1077
1078 static u32 ibmvnic_get_link(struct net_device *netdev)
1079 {
1080         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1081
1082         /* Don't need to send a query because we request a logical link up at
1083          * init and then we wait for link state indications
1084          */
1085         return adapter->logical_link_state;
1086 }
1087
1088 static void ibmvnic_get_ringparam(struct net_device *netdev,
1089                                   struct ethtool_ringparam *ring)
1090 {
1091         ring->rx_max_pending = 0;
1092         ring->tx_max_pending = 0;
1093         ring->rx_mini_max_pending = 0;
1094         ring->rx_jumbo_max_pending = 0;
1095         ring->rx_pending = 0;
1096         ring->tx_pending = 0;
1097         ring->rx_mini_pending = 0;
1098         ring->rx_jumbo_pending = 0;
1099 }
1100
1101 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1102 {
1103         int i;
1104
1105         if (stringset != ETH_SS_STATS)
1106                 return;
1107
1108         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1109                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1110 }
1111
1112 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1113 {
1114         switch (sset) {
1115         case ETH_SS_STATS:
1116                 return ARRAY_SIZE(ibmvnic_stats);
1117         default:
1118                 return -EOPNOTSUPP;
1119         }
1120 }
1121
1122 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1123                                       struct ethtool_stats *stats, u64 *data)
1124 {
1125         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1126         union ibmvnic_crq crq;
1127         int i;
1128
1129         memset(&crq, 0, sizeof(crq));
1130         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1131         crq.request_statistics.cmd = REQUEST_STATISTICS;
1132         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1133         crq.request_statistics.len =
1134             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1135         ibmvnic_send_crq(adapter, &crq);
1136
1137         /* Wait for data to be written */
1138         init_completion(&adapter->stats_done);
1139         wait_for_completion(&adapter->stats_done);
1140
1141         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1142                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1143 }
1144
1145 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1146         .get_settings           = ibmvnic_get_settings,
1147         .get_drvinfo            = ibmvnic_get_drvinfo,
1148         .get_msglevel           = ibmvnic_get_msglevel,
1149         .set_msglevel           = ibmvnic_set_msglevel,
1150         .get_link               = ibmvnic_get_link,
1151         .get_ringparam          = ibmvnic_get_ringparam,
1152         .get_strings            = ibmvnic_get_strings,
1153         .get_sset_count         = ibmvnic_get_sset_count,
1154         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1155 };
1156
1157 /* Routines for managing CRQs/sCRQs  */
1158
1159 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1160                                   struct ibmvnic_sub_crq_queue *scrq)
1161 {
1162         struct device *dev = &adapter->vdev->dev;
1163         long rc;
1164
1165         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1166
1167         /* Close the sub-crqs */
1168         do {
1169                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1170                                         adapter->vdev->unit_address,
1171                                         scrq->crq_num);
1172         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1173
1174         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1175                          DMA_BIDIRECTIONAL);
1176         free_pages((unsigned long)scrq->msgs, 2);
1177         kfree(scrq);
1178 }
1179
1180 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1181                                                         *adapter)
1182 {
1183         struct device *dev = &adapter->vdev->dev;
1184         struct ibmvnic_sub_crq_queue *scrq;
1185         int rc;
1186
1187         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1188         if (!scrq)
1189                 return NULL;
1190
1191         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
1192         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1193         if (!scrq->msgs) {
1194                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1195                 goto zero_page_failed;
1196         }
1197
1198         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1199                                          DMA_BIDIRECTIONAL);
1200         if (dma_mapping_error(dev, scrq->msg_token)) {
1201                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1202                 goto map_failed;
1203         }
1204
1205         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1206                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1207
1208         if (rc == H_RESOURCE)
1209                 rc = ibmvnic_reset_crq(adapter);
1210
1211         if (rc == H_CLOSED) {
1212                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1213         } else if (rc) {
1214                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1215                 goto reg_failed;
1216         }
1217
1218         scrq->adapter = adapter;
1219         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1220         scrq->cur = 0;
1221         scrq->rx_skb_top = NULL;
1222         spin_lock_init(&scrq->lock);
1223
1224         netdev_dbg(adapter->netdev,
1225                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1226                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1227
1228         return scrq;
1229
1230 reg_failed:
1231         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1232                          DMA_BIDIRECTIONAL);
1233 map_failed:
1234         free_pages((unsigned long)scrq->msgs, 2);
1235 zero_page_failed:
1236         kfree(scrq);
1237
1238         return NULL;
1239 }
1240
1241 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1242 {
1243         int i;
1244
1245         if (adapter->tx_scrq) {
1246                 for (i = 0; i < adapter->req_tx_queues; i++)
1247                         if (adapter->tx_scrq[i]) {
1248                                 free_irq(adapter->tx_scrq[i]->irq,
1249                                          adapter->tx_scrq[i]);
1250                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1251                                 release_sub_crq_queue(adapter,
1252                                                       adapter->tx_scrq[i]);
1253                         }
1254                 adapter->tx_scrq = NULL;
1255         }
1256
1257         if (adapter->rx_scrq) {
1258                 for (i = 0; i < adapter->req_rx_queues; i++)
1259                         if (adapter->rx_scrq[i]) {
1260                                 free_irq(adapter->rx_scrq[i]->irq,
1261                                          adapter->rx_scrq[i]);
1262                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1263                                 release_sub_crq_queue(adapter,
1264                                                       adapter->rx_scrq[i]);
1265                         }
1266                 adapter->rx_scrq = NULL;
1267         }
1268
1269         adapter->requested_caps = 0;
1270 }
1271
1272 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1273 {
1274         int i;
1275
1276         if (adapter->tx_scrq) {
1277                 for (i = 0; i < adapter->req_tx_queues; i++)
1278                         if (adapter->tx_scrq[i])
1279                                 release_sub_crq_queue(adapter,
1280                                                       adapter->tx_scrq[i]);
1281                 adapter->tx_scrq = NULL;
1282         }
1283
1284         if (adapter->rx_scrq) {
1285                 for (i = 0; i < adapter->req_rx_queues; i++)
1286                         if (adapter->rx_scrq[i])
1287                                 release_sub_crq_queue(adapter,
1288                                                       adapter->rx_scrq[i]);
1289                 adapter->rx_scrq = NULL;
1290         }
1291
1292         adapter->requested_caps = 0;
1293 }
1294
1295 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1296                             struct ibmvnic_sub_crq_queue *scrq)
1297 {
1298         struct device *dev = &adapter->vdev->dev;
1299         unsigned long rc;
1300
1301         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1302                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1303         if (rc)
1304                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1305                         scrq->hw_irq, rc);
1306         return rc;
1307 }
1308
1309 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1310                            struct ibmvnic_sub_crq_queue *scrq)
1311 {
1312         struct device *dev = &adapter->vdev->dev;
1313         unsigned long rc;
1314
1315         if (scrq->hw_irq > 0x100000000ULL) {
1316                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1317                 return 1;
1318         }
1319
1320         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1321                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1322         if (rc)
1323                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1324                         scrq->hw_irq, rc);
1325         return rc;
1326 }
1327
1328 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1329                                struct ibmvnic_sub_crq_queue *scrq)
1330 {
1331         struct device *dev = &adapter->vdev->dev;
1332         struct ibmvnic_tx_buff *txbuff;
1333         union sub_crq *next;
1334         int index;
1335         int i, j;
1336         u8 first;
1337
1338 restart_loop:
1339         while (pending_scrq(adapter, scrq)) {
1340                 unsigned int pool = scrq->pool_index;
1341
1342                 next = ibmvnic_next_scrq(adapter, scrq);
1343                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1344                         if (next->tx_comp.rcs[i]) {
1345                                 dev_err(dev, "tx error %x\n",
1346                                         next->tx_comp.rcs[i]);
1347                                 continue;
1348                         }
1349                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1350                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1351
1352                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1353                                 if (!txbuff->data_dma[j])
1354                                         continue;
1355
1356                                 txbuff->data_dma[j] = 0;
1357                                 txbuff->used_bounce = false;
1358                         }
1359                         /* if sub_crq was sent indirectly */
1360                         first = txbuff->indir_arr[0].generic.first;
1361                         if (first == IBMVNIC_CRQ_CMD) {
1362                                 dma_unmap_single(dev, txbuff->indir_dma,
1363                                                  sizeof(txbuff->indir_arr),
1364                                                  DMA_TO_DEVICE);
1365                         }
1366
1367                         if (txbuff->last_frag)
1368                                 dev_kfree_skb_any(txbuff->skb);
1369
1370                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1371                                                      producer_index] = index;
1372                         adapter->tx_pool[pool].producer_index =
1373                             (adapter->tx_pool[pool].producer_index + 1) %
1374                             adapter->max_tx_entries_per_subcrq;
1375                 }
1376                 /* remove tx_comp scrq*/
1377                 next->tx_comp.first = 0;
1378         }
1379
1380         enable_scrq_irq(adapter, scrq);
1381
1382         if (pending_scrq(adapter, scrq)) {
1383                 disable_scrq_irq(adapter, scrq);
1384                 goto restart_loop;
1385         }
1386
1387         return 0;
1388 }
1389
1390 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1391 {
1392         struct ibmvnic_sub_crq_queue *scrq = instance;
1393         struct ibmvnic_adapter *adapter = scrq->adapter;
1394
1395         disable_scrq_irq(adapter, scrq);
1396         ibmvnic_complete_tx(adapter, scrq);
1397
1398         return IRQ_HANDLED;
1399 }
1400
1401 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1402 {
1403         struct ibmvnic_sub_crq_queue *scrq = instance;
1404         struct ibmvnic_adapter *adapter = scrq->adapter;
1405
1406         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1407                 disable_scrq_irq(adapter, scrq);
1408                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1409         }
1410
1411         return IRQ_HANDLED;
1412 }
1413
1414 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1415 {
1416         struct device *dev = &adapter->vdev->dev;
1417         struct ibmvnic_sub_crq_queue *scrq;
1418         int i = 0, j = 0;
1419         int rc = 0;
1420
1421         for (i = 0; i < adapter->req_tx_queues; i++) {
1422                 scrq = adapter->tx_scrq[i];
1423                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1424
1425                 if (scrq->irq == NO_IRQ) {
1426                         rc = -EINVAL;
1427                         dev_err(dev, "Error mapping irq\n");
1428                         goto req_tx_irq_failed;
1429                 }
1430
1431                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1432                                  0, "ibmvnic_tx", scrq);
1433
1434                 if (rc) {
1435                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1436                                 scrq->irq, rc);
1437                         irq_dispose_mapping(scrq->irq);
1438                         goto req_rx_irq_failed;
1439                 }
1440         }
1441
1442         for (i = 0; i < adapter->req_rx_queues; i++) {
1443                 scrq = adapter->rx_scrq[i];
1444                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1445                 if (scrq->irq == NO_IRQ) {
1446                         rc = -EINVAL;
1447                         dev_err(dev, "Error mapping irq\n");
1448                         goto req_rx_irq_failed;
1449                 }
1450                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1451                                  0, "ibmvnic_rx", scrq);
1452                 if (rc) {
1453                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1454                                 scrq->irq, rc);
1455                         irq_dispose_mapping(scrq->irq);
1456                         goto req_rx_irq_failed;
1457                 }
1458         }
1459         return rc;
1460
1461 req_rx_irq_failed:
1462         for (j = 0; j < i; j++)
1463                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1464                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1465         i = adapter->req_tx_queues;
1466 req_tx_irq_failed:
1467         for (j = 0; j < i; j++)
1468                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1469                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1470         release_sub_crqs_no_irqs(adapter);
1471         return rc;
1472 }
1473
1474 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1475 {
1476         struct device *dev = &adapter->vdev->dev;
1477         struct ibmvnic_sub_crq_queue **allqueues;
1478         int registered_queues = 0;
1479         union ibmvnic_crq crq;
1480         int total_queues;
1481         int more = 0;
1482         int i;
1483
1484         if (!retry) {
1485                 /* Sub-CRQ entries are 32 byte long */
1486                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1487
1488                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1489                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1490                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1491                         goto allqueues_failed;
1492                 }
1493
1494                 /* Get the minimum between the queried max and the entries
1495                  * that fit in our PAGE_SIZE
1496                  */
1497                 adapter->req_tx_entries_per_subcrq =
1498                     adapter->max_tx_entries_per_subcrq > entries_page ?
1499                     entries_page : adapter->max_tx_entries_per_subcrq;
1500                 adapter->req_rx_add_entries_per_subcrq =
1501                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1502                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1503
1504                 /* Choosing the maximum number of queues supported by firmware*/
1505                 adapter->req_tx_queues = adapter->max_tx_queues;
1506                 adapter->req_rx_queues = adapter->max_rx_queues;
1507                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1508
1509                 adapter->req_mtu = adapter->max_mtu;
1510         }
1511
1512         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1513
1514         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1515         if (!allqueues)
1516                 goto allqueues_failed;
1517
1518         for (i = 0; i < total_queues; i++) {
1519                 allqueues[i] = init_sub_crq_queue(adapter);
1520                 if (!allqueues[i]) {
1521                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1522                         break;
1523                 }
1524                 registered_queues++;
1525         }
1526
1527         /* Make sure we were able to register the minimum number of queues */
1528         if (registered_queues <
1529             adapter->min_tx_queues + adapter->min_rx_queues) {
1530                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1531                 goto tx_failed;
1532         }
1533
1534         /* Distribute the failed allocated queues*/
1535         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1536                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1537                 switch (i % 3) {
1538                 case 0:
1539                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1540                                 adapter->req_rx_queues--;
1541                         else
1542                                 more++;
1543                         break;
1544                 case 1:
1545                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1546                                 adapter->req_tx_queues--;
1547                         else
1548                                 more++;
1549                         break;
1550                 }
1551         }
1552
1553         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1554                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1555         if (!adapter->tx_scrq)
1556                 goto tx_failed;
1557
1558         for (i = 0; i < adapter->req_tx_queues; i++) {
1559                 adapter->tx_scrq[i] = allqueues[i];
1560                 adapter->tx_scrq[i]->pool_index = i;
1561         }
1562
1563         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1564                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1565         if (!adapter->rx_scrq)
1566                 goto rx_failed;
1567
1568         for (i = 0; i < adapter->req_rx_queues; i++) {
1569                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1570                 adapter->rx_scrq[i]->scrq_num = i;
1571         }
1572
1573         memset(&crq, 0, sizeof(crq));
1574         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1575         crq.request_capability.cmd = REQUEST_CAPABILITY;
1576
1577         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1578         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1579         ibmvnic_send_crq(adapter, &crq);
1580
1581         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1582         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1583         ibmvnic_send_crq(adapter, &crq);
1584
1585         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1586         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1587         ibmvnic_send_crq(adapter, &crq);
1588
1589         crq.request_capability.capability =
1590             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1591         crq.request_capability.number =
1592             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1593         ibmvnic_send_crq(adapter, &crq);
1594
1595         crq.request_capability.capability =
1596             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1597         crq.request_capability.number =
1598             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1599         ibmvnic_send_crq(adapter, &crq);
1600
1601         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1602         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1603         ibmvnic_send_crq(adapter, &crq);
1604
1605         if (adapter->netdev->flags & IFF_PROMISC) {
1606                 if (adapter->promisc_supported) {
1607                         crq.request_capability.capability =
1608                             cpu_to_be16(PROMISC_REQUESTED);
1609                         crq.request_capability.number = cpu_to_be64(1);
1610                         ibmvnic_send_crq(adapter, &crq);
1611                 }
1612         } else {
1613                 crq.request_capability.capability =
1614                     cpu_to_be16(PROMISC_REQUESTED);
1615                 crq.request_capability.number = cpu_to_be64(0);
1616                 ibmvnic_send_crq(adapter, &crq);
1617         }
1618
1619         kfree(allqueues);
1620
1621         return;
1622
1623 rx_failed:
1624         kfree(adapter->tx_scrq);
1625         adapter->tx_scrq = NULL;
1626 tx_failed:
1627         for (i = 0; i < registered_queues; i++)
1628                 release_sub_crq_queue(adapter, allqueues[i]);
1629         kfree(allqueues);
1630 allqueues_failed:
1631         ibmvnic_remove(adapter->vdev);
1632 }
1633
1634 static int pending_scrq(struct ibmvnic_adapter *adapter,
1635                         struct ibmvnic_sub_crq_queue *scrq)
1636 {
1637         union sub_crq *entry = &scrq->msgs[scrq->cur];
1638
1639         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1640                 return 1;
1641         else
1642                 return 0;
1643 }
1644
1645 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1646                                         struct ibmvnic_sub_crq_queue *scrq)
1647 {
1648         union sub_crq *entry;
1649         unsigned long flags;
1650
1651         spin_lock_irqsave(&scrq->lock, flags);
1652         entry = &scrq->msgs[scrq->cur];
1653         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1654                 if (++scrq->cur == scrq->size)
1655                         scrq->cur = 0;
1656         } else {
1657                 entry = NULL;
1658         }
1659         spin_unlock_irqrestore(&scrq->lock, flags);
1660
1661         return entry;
1662 }
1663
1664 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1665 {
1666         struct ibmvnic_crq_queue *queue = &adapter->crq;
1667         union ibmvnic_crq *crq;
1668
1669         crq = &queue->msgs[queue->cur];
1670         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1671                 if (++queue->cur == queue->size)
1672                         queue->cur = 0;
1673         } else {
1674                 crq = NULL;
1675         }
1676
1677         return crq;
1678 }
1679
1680 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1681                        union sub_crq *sub_crq)
1682 {
1683         unsigned int ua = adapter->vdev->unit_address;
1684         struct device *dev = &adapter->vdev->dev;
1685         u64 *u64_crq = (u64 *)sub_crq;
1686         int rc;
1687
1688         netdev_dbg(adapter->netdev,
1689                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1690                    (unsigned long int)cpu_to_be64(remote_handle),
1691                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1692                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1693                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1694                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1695
1696         /* Make sure the hypervisor sees the complete request */
1697         mb();
1698
1699         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1700                                 cpu_to_be64(remote_handle),
1701                                 cpu_to_be64(u64_crq[0]),
1702                                 cpu_to_be64(u64_crq[1]),
1703                                 cpu_to_be64(u64_crq[2]),
1704                                 cpu_to_be64(u64_crq[3]));
1705
1706         if (rc) {
1707                 if (rc == H_CLOSED)
1708                         dev_warn(dev, "CRQ Queue closed\n");
1709                 dev_err(dev, "Send error (rc=%d)\n", rc);
1710         }
1711
1712         return rc;
1713 }
1714
1715 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1716                                 u64 remote_handle, u64 ioba, u64 num_entries)
1717 {
1718         unsigned int ua = adapter->vdev->unit_address;
1719         struct device *dev = &adapter->vdev->dev;
1720         int rc;
1721
1722         /* Make sure the hypervisor sees the complete request */
1723         mb();
1724         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1725                                 cpu_to_be64(remote_handle),
1726                                 ioba, num_entries);
1727
1728         if (rc) {
1729                 if (rc == H_CLOSED)
1730                         dev_warn(dev, "CRQ Queue closed\n");
1731                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1732         }
1733
1734         return rc;
1735 }
1736
1737 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1738                             union ibmvnic_crq *crq)
1739 {
1740         unsigned int ua = adapter->vdev->unit_address;
1741         struct device *dev = &adapter->vdev->dev;
1742         u64 *u64_crq = (u64 *)crq;
1743         int rc;
1744
1745         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1746                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1747                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1748
1749         /* Make sure the hypervisor sees the complete request */
1750         mb();
1751
1752         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1753                                 cpu_to_be64(u64_crq[0]),
1754                                 cpu_to_be64(u64_crq[1]));
1755
1756         if (rc) {
1757                 if (rc == H_CLOSED)
1758                         dev_warn(dev, "CRQ Queue closed\n");
1759                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1760         }
1761
1762         return rc;
1763 }
1764
1765 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1766 {
1767         union ibmvnic_crq crq;
1768
1769         memset(&crq, 0, sizeof(crq));
1770         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1771         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1772         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1773
1774         return ibmvnic_send_crq(adapter, &crq);
1775 }
1776
1777 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1778 {
1779         union ibmvnic_crq crq;
1780
1781         memset(&crq, 0, sizeof(crq));
1782         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1783         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1784         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1785
1786         return ibmvnic_send_crq(adapter, &crq);
1787 }
1788
1789 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1790 {
1791         union ibmvnic_crq crq;
1792
1793         memset(&crq, 0, sizeof(crq));
1794         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1795         crq.version_exchange.cmd = VERSION_EXCHANGE;
1796         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1797
1798         return ibmvnic_send_crq(adapter, &crq);
1799 }
1800
1801 static void send_login(struct ibmvnic_adapter *adapter)
1802 {
1803         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1804         struct ibmvnic_login_buffer *login_buffer;
1805         struct ibmvnic_inflight_cmd *inflight_cmd;
1806         struct device *dev = &adapter->vdev->dev;
1807         dma_addr_t rsp_buffer_token;
1808         dma_addr_t buffer_token;
1809         size_t rsp_buffer_size;
1810         union ibmvnic_crq crq;
1811         unsigned long flags;
1812         size_t buffer_size;
1813         __be64 *tx_list_p;
1814         __be64 *rx_list_p;
1815         int i;
1816
1817         buffer_size =
1818             sizeof(struct ibmvnic_login_buffer) +
1819             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1820
1821         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1822         if (!login_buffer)
1823                 goto buf_alloc_failed;
1824
1825         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1826                                       DMA_TO_DEVICE);
1827         if (dma_mapping_error(dev, buffer_token)) {
1828                 dev_err(dev, "Couldn't map login buffer\n");
1829                 goto buf_map_failed;
1830         }
1831
1832         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1833                           sizeof(u64) * adapter->req_tx_queues +
1834                           sizeof(u64) * adapter->req_rx_queues +
1835                           sizeof(u64) * adapter->req_rx_queues +
1836                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1837
1838         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1839         if (!login_rsp_buffer)
1840                 goto buf_rsp_alloc_failed;
1841
1842         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1843                                           rsp_buffer_size, DMA_FROM_DEVICE);
1844         if (dma_mapping_error(dev, rsp_buffer_token)) {
1845                 dev_err(dev, "Couldn't map login rsp buffer\n");
1846                 goto buf_rsp_map_failed;
1847         }
1848         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1849         if (!inflight_cmd) {
1850                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1851                 goto inflight_alloc_failed;
1852         }
1853         adapter->login_buf = login_buffer;
1854         adapter->login_buf_token = buffer_token;
1855         adapter->login_buf_sz = buffer_size;
1856         adapter->login_rsp_buf = login_rsp_buffer;
1857         adapter->login_rsp_buf_token = rsp_buffer_token;
1858         adapter->login_rsp_buf_sz = rsp_buffer_size;
1859
1860         login_buffer->len = cpu_to_be32(buffer_size);
1861         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1862         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1863         login_buffer->off_txcomp_subcrqs =
1864             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1865         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1866         login_buffer->off_rxcomp_subcrqs =
1867             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1868                         sizeof(u64) * adapter->req_tx_queues);
1869         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1870         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1871
1872         tx_list_p = (__be64 *)((char *)login_buffer +
1873                                       sizeof(struct ibmvnic_login_buffer));
1874         rx_list_p = (__be64 *)((char *)login_buffer +
1875                                       sizeof(struct ibmvnic_login_buffer) +
1876                                       sizeof(u64) * adapter->req_tx_queues);
1877
1878         for (i = 0; i < adapter->req_tx_queues; i++) {
1879                 if (adapter->tx_scrq[i]) {
1880                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1881                                                    crq_num);
1882                 }
1883         }
1884
1885         for (i = 0; i < adapter->req_rx_queues; i++) {
1886                 if (adapter->rx_scrq[i]) {
1887                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1888                                                    crq_num);
1889                 }
1890         }
1891
1892         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1893         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1894                 netdev_dbg(adapter->netdev, "%016lx\n",
1895                            ((unsigned long int *)(adapter->login_buf))[i]);
1896         }
1897
1898         memset(&crq, 0, sizeof(crq));
1899         crq.login.first = IBMVNIC_CRQ_CMD;
1900         crq.login.cmd = LOGIN;
1901         crq.login.ioba = cpu_to_be32(buffer_token);
1902         crq.login.len = cpu_to_be32(buffer_size);
1903
1904         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1905
1906         spin_lock_irqsave(&adapter->inflight_lock, flags);
1907         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1908         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1909
1910         ibmvnic_send_crq(adapter, &crq);
1911
1912         return;
1913
1914 inflight_alloc_failed:
1915         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1916                          DMA_FROM_DEVICE);
1917 buf_rsp_map_failed:
1918         kfree(login_rsp_buffer);
1919 buf_rsp_alloc_failed:
1920         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1921 buf_map_failed:
1922         kfree(login_buffer);
1923 buf_alloc_failed:
1924         return;
1925 }
1926
1927 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1928                              u32 len, u8 map_id)
1929 {
1930         union ibmvnic_crq crq;
1931
1932         memset(&crq, 0, sizeof(crq));
1933         crq.request_map.first = IBMVNIC_CRQ_CMD;
1934         crq.request_map.cmd = REQUEST_MAP;
1935         crq.request_map.map_id = map_id;
1936         crq.request_map.ioba = cpu_to_be32(addr);
1937         crq.request_map.len = cpu_to_be32(len);
1938         ibmvnic_send_crq(adapter, &crq);
1939 }
1940
1941 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1942 {
1943         union ibmvnic_crq crq;
1944
1945         memset(&crq, 0, sizeof(crq));
1946         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1947         crq.request_unmap.cmd = REQUEST_UNMAP;
1948         crq.request_unmap.map_id = map_id;
1949         ibmvnic_send_crq(adapter, &crq);
1950 }
1951
1952 static void send_map_query(struct ibmvnic_adapter *adapter)
1953 {
1954         union ibmvnic_crq crq;
1955
1956         memset(&crq, 0, sizeof(crq));
1957         crq.query_map.first = IBMVNIC_CRQ_CMD;
1958         crq.query_map.cmd = QUERY_MAP;
1959         ibmvnic_send_crq(adapter, &crq);
1960 }
1961
1962 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1963 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1964 {
1965         union ibmvnic_crq crq;
1966
1967         atomic_set(&adapter->running_cap_queries, 0);
1968         memset(&crq, 0, sizeof(crq));
1969         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1970         crq.query_capability.cmd = QUERY_CAPABILITY;
1971
1972         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1973         atomic_inc(&adapter->running_cap_queries);
1974         ibmvnic_send_crq(adapter, &crq);
1975
1976         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1977         atomic_inc(&adapter->running_cap_queries);
1978         ibmvnic_send_crq(adapter, &crq);
1979
1980         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1981         atomic_inc(&adapter->running_cap_queries);
1982         ibmvnic_send_crq(adapter, &crq);
1983
1984         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1985         atomic_inc(&adapter->running_cap_queries);
1986         ibmvnic_send_crq(adapter, &crq);
1987
1988         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1989         atomic_inc(&adapter->running_cap_queries);
1990         ibmvnic_send_crq(adapter, &crq);
1991
1992         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1993         atomic_inc(&adapter->running_cap_queries);
1994         ibmvnic_send_crq(adapter, &crq);
1995
1996         crq.query_capability.capability =
1997             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1998         atomic_inc(&adapter->running_cap_queries);
1999         ibmvnic_send_crq(adapter, &crq);
2000
2001         crq.query_capability.capability =
2002             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2003         atomic_inc(&adapter->running_cap_queries);
2004         ibmvnic_send_crq(adapter, &crq);
2005
2006         crq.query_capability.capability =
2007             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2008         atomic_inc(&adapter->running_cap_queries);
2009         ibmvnic_send_crq(adapter, &crq);
2010
2011         crq.query_capability.capability =
2012             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2013         atomic_inc(&adapter->running_cap_queries);
2014         ibmvnic_send_crq(adapter, &crq);
2015
2016         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2017         atomic_inc(&adapter->running_cap_queries);
2018         ibmvnic_send_crq(adapter, &crq);
2019
2020         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2021         atomic_inc(&adapter->running_cap_queries);
2022         ibmvnic_send_crq(adapter, &crq);
2023
2024         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2025         atomic_inc(&adapter->running_cap_queries);
2026         ibmvnic_send_crq(adapter, &crq);
2027
2028         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2029         atomic_inc(&adapter->running_cap_queries);
2030         ibmvnic_send_crq(adapter, &crq);
2031
2032         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2033         atomic_inc(&adapter->running_cap_queries);
2034         ibmvnic_send_crq(adapter, &crq);
2035
2036         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2037         atomic_inc(&adapter->running_cap_queries);
2038         ibmvnic_send_crq(adapter, &crq);
2039
2040         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2041         atomic_inc(&adapter->running_cap_queries);
2042         ibmvnic_send_crq(adapter, &crq);
2043
2044         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2045         atomic_inc(&adapter->running_cap_queries);
2046         ibmvnic_send_crq(adapter, &crq);
2047
2048         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2049         atomic_inc(&adapter->running_cap_queries);
2050         ibmvnic_send_crq(adapter, &crq);
2051
2052         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2053         atomic_inc(&adapter->running_cap_queries);
2054         ibmvnic_send_crq(adapter, &crq);
2055
2056         crq.query_capability.capability =
2057                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2058         atomic_inc(&adapter->running_cap_queries);
2059         ibmvnic_send_crq(adapter, &crq);
2060
2061         crq.query_capability.capability =
2062                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2063         atomic_inc(&adapter->running_cap_queries);
2064         ibmvnic_send_crq(adapter, &crq);
2065
2066         crq.query_capability.capability =
2067                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2068         atomic_inc(&adapter->running_cap_queries);
2069         ibmvnic_send_crq(adapter, &crq);
2070
2071         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2072         atomic_inc(&adapter->running_cap_queries);
2073         ibmvnic_send_crq(adapter, &crq);
2074 }
2075
2076 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2077 {
2078         struct device *dev = &adapter->vdev->dev;
2079         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2080         union ibmvnic_crq crq;
2081         int i;
2082
2083         dma_unmap_single(dev, adapter->ip_offload_tok,
2084                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2085
2086         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2087         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2088                 netdev_dbg(adapter->netdev, "%016lx\n",
2089                            ((unsigned long int *)(buf))[i]);
2090
2091         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2092         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2093         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2094                    buf->tcp_ipv4_chksum);
2095         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2096                    buf->tcp_ipv6_chksum);
2097         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2098                    buf->udp_ipv4_chksum);
2099         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2100                    buf->udp_ipv6_chksum);
2101         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2102                    buf->large_tx_ipv4);
2103         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2104                    buf->large_tx_ipv6);
2105         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2106                    buf->large_rx_ipv4);
2107         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2108                    buf->large_rx_ipv6);
2109         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2110                    buf->max_ipv4_header_size);
2111         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2112                    buf->max_ipv6_header_size);
2113         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2114                    buf->max_tcp_header_size);
2115         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2116                    buf->max_udp_header_size);
2117         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2118                    buf->max_large_tx_size);
2119         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2120                    buf->max_large_rx_size);
2121         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2122                    buf->ipv6_extension_header);
2123         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2124                    buf->tcp_pseudosum_req);
2125         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2126                    buf->num_ipv6_ext_headers);
2127         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2128                    buf->off_ipv6_ext_headers);
2129
2130         adapter->ip_offload_ctrl_tok =
2131             dma_map_single(dev, &adapter->ip_offload_ctrl,
2132                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2133
2134         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2135                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2136                 return;
2137         }
2138
2139         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2140         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2141         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2142         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2143         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2144
2145         /* large_tx/rx disabled for now, additional features needed */
2146         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2147         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2148         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2149         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2150
2151         adapter->netdev->features = NETIF_F_GSO;
2152
2153         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2154                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2155
2156         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2157                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2158
2159         if ((adapter->netdev->features &
2160             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2161                 adapter->netdev->features |= NETIF_F_RXCSUM;
2162
2163         memset(&crq, 0, sizeof(crq));
2164         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2165         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2166         crq.control_ip_offload.len =
2167             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2168         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2169         ibmvnic_send_crq(adapter, &crq);
2170 }
2171
2172 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2173                                   struct ibmvnic_adapter *adapter)
2174 {
2175         struct device *dev = &adapter->vdev->dev;
2176         struct ibmvnic_error_buff *error_buff, *tmp;
2177         unsigned long flags;
2178         bool found = false;
2179         int i;
2180
2181         if (!crq->request_error_rsp.rc.code) {
2182                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2183                          crq->request_error_rsp.rc.code);
2184                 return;
2185         }
2186
2187         spin_lock_irqsave(&adapter->error_list_lock, flags);
2188         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2189                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2190                         found = true;
2191                         list_del(&error_buff->list);
2192                         break;
2193                 }
2194         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2195
2196         if (!found) {
2197                 dev_err(dev, "Couldn't find error id %x\n",
2198                         crq->request_error_rsp.error_id);
2199                 return;
2200         }
2201
2202         dev_err(dev, "Detailed info for error id %x:",
2203                 crq->request_error_rsp.error_id);
2204
2205         for (i = 0; i < error_buff->len; i++) {
2206                 pr_cont("%02x", (int)error_buff->buff[i]);
2207                 if (i % 8 == 7)
2208                         pr_cont(" ");
2209         }
2210         pr_cont("\n");
2211
2212         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2213                          DMA_FROM_DEVICE);
2214         kfree(error_buff->buff);
2215         kfree(error_buff);
2216 }
2217
2218 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2219                                  struct ibmvnic_adapter *adapter)
2220 {
2221         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2222         struct ibmvnic_inflight_cmd *inflight_cmd;
2223         struct device *dev = &adapter->vdev->dev;
2224         union ibmvnic_crq newcrq;
2225         unsigned long flags;
2226
2227         /* allocate and map buffer */
2228         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2229         if (!adapter->dump_data) {
2230                 complete(&adapter->fw_done);
2231                 return;
2232         }
2233
2234         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2235                                                   DMA_FROM_DEVICE);
2236
2237         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2238                 if (!firmware_has_feature(FW_FEATURE_CMO))
2239                         dev_err(dev, "Couldn't map dump data\n");
2240                 kfree(adapter->dump_data);
2241                 complete(&adapter->fw_done);
2242                 return;
2243         }
2244
2245         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2246         if (!inflight_cmd) {
2247                 dma_unmap_single(dev, adapter->dump_data_token, len,
2248                                  DMA_FROM_DEVICE);
2249                 kfree(adapter->dump_data);
2250                 complete(&adapter->fw_done);
2251                 return;
2252         }
2253
2254         memset(&newcrq, 0, sizeof(newcrq));
2255         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2256         newcrq.request_dump.cmd = REQUEST_DUMP;
2257         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2258         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2259
2260         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2261
2262         spin_lock_irqsave(&adapter->inflight_lock, flags);
2263         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2264         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2265
2266         ibmvnic_send_crq(adapter, &newcrq);
2267 }
2268
2269 static void handle_error_indication(union ibmvnic_crq *crq,
2270                                     struct ibmvnic_adapter *adapter)
2271 {
2272         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2273         struct ibmvnic_inflight_cmd *inflight_cmd;
2274         struct device *dev = &adapter->vdev->dev;
2275         struct ibmvnic_error_buff *error_buff;
2276         union ibmvnic_crq new_crq;
2277         unsigned long flags;
2278
2279         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2280                 crq->error_indication.
2281                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2282                 crq->error_indication.error_id,
2283                 crq->error_indication.error_cause);
2284
2285         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2286         if (!error_buff)
2287                 return;
2288
2289         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2290         if (!error_buff->buff) {
2291                 kfree(error_buff);
2292                 return;
2293         }
2294
2295         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2296                                          DMA_FROM_DEVICE);
2297         if (dma_mapping_error(dev, error_buff->dma)) {
2298                 if (!firmware_has_feature(FW_FEATURE_CMO))
2299                         dev_err(dev, "Couldn't map error buffer\n");
2300                 kfree(error_buff->buff);
2301                 kfree(error_buff);
2302                 return;
2303         }
2304
2305         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2306         if (!inflight_cmd) {
2307                 dma_unmap_single(dev, error_buff->dma, detail_len,
2308                                  DMA_FROM_DEVICE);
2309                 kfree(error_buff->buff);
2310                 kfree(error_buff);
2311                 return;
2312         }
2313
2314         error_buff->len = detail_len;
2315         error_buff->error_id = crq->error_indication.error_id;
2316
2317         spin_lock_irqsave(&adapter->error_list_lock, flags);
2318         list_add_tail(&error_buff->list, &adapter->errors);
2319         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2320
2321         memset(&new_crq, 0, sizeof(new_crq));
2322         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2323         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2324         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2325         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2326         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2327
2328         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2329
2330         spin_lock_irqsave(&adapter->inflight_lock, flags);
2331         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2332         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2333
2334         ibmvnic_send_crq(adapter, &new_crq);
2335 }
2336
2337 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2338                                   struct ibmvnic_adapter *adapter)
2339 {
2340         struct net_device *netdev = adapter->netdev;
2341         struct device *dev = &adapter->vdev->dev;
2342         long rc;
2343
2344         rc = crq->change_mac_addr_rsp.rc.code;
2345         if (rc) {
2346                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2347                 return;
2348         }
2349         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2350                ETH_ALEN);
2351 }
2352
2353 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2354                                    struct ibmvnic_adapter *adapter)
2355 {
2356         struct device *dev = &adapter->vdev->dev;
2357         u64 *req_value;
2358         char *name;
2359
2360         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2361         case REQ_TX_QUEUES:
2362                 req_value = &adapter->req_tx_queues;
2363                 name = "tx";
2364                 break;
2365         case REQ_RX_QUEUES:
2366                 req_value = &adapter->req_rx_queues;
2367                 name = "rx";
2368                 break;
2369         case REQ_RX_ADD_QUEUES:
2370                 req_value = &adapter->req_rx_add_queues;
2371                 name = "rx_add";
2372                 break;
2373         case REQ_TX_ENTRIES_PER_SUBCRQ:
2374                 req_value = &adapter->req_tx_entries_per_subcrq;
2375                 name = "tx_entries_per_subcrq";
2376                 break;
2377         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2378                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2379                 name = "rx_add_entries_per_subcrq";
2380                 break;
2381         case REQ_MTU:
2382                 req_value = &adapter->req_mtu;
2383                 name = "mtu";
2384                 break;
2385         case PROMISC_REQUESTED:
2386                 req_value = &adapter->promisc;
2387                 name = "promisc";
2388                 break;
2389         default:
2390                 dev_err(dev, "Got invalid cap request rsp %d\n",
2391                         crq->request_capability.capability);
2392                 return;
2393         }
2394
2395         switch (crq->request_capability_rsp.rc.code) {
2396         case SUCCESS:
2397                 break;
2398         case PARTIALSUCCESS:
2399                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2400                          *req_value,
2401                          (long int)be32_to_cpu(crq->request_capability_rsp.
2402                                                number), name);
2403                 release_sub_crqs_no_irqs(adapter);
2404                 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2405                 init_sub_crqs(adapter, 1);
2406                 return;
2407         default:
2408                 dev_err(dev, "Error %d in request cap rsp\n",
2409                         crq->request_capability_rsp.rc.code);
2410                 return;
2411         }
2412
2413         /* Done receiving requested capabilities, query IP offload support */
2414         if (++adapter->requested_caps == 7) {
2415                 union ibmvnic_crq newcrq;
2416                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2417                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2418                     &adapter->ip_offload_buf;
2419
2420                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2421                                                          buf_sz,
2422                                                          DMA_FROM_DEVICE);
2423
2424                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2425                         if (!firmware_has_feature(FW_FEATURE_CMO))
2426                                 dev_err(dev, "Couldn't map offload buffer\n");
2427                         return;
2428                 }
2429
2430                 memset(&newcrq, 0, sizeof(newcrq));
2431                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2432                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2433                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2434                 newcrq.query_ip_offload.ioba =
2435                     cpu_to_be32(adapter->ip_offload_tok);
2436
2437                 ibmvnic_send_crq(adapter, &newcrq);
2438         }
2439 }
2440
2441 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2442                             struct ibmvnic_adapter *adapter)
2443 {
2444         struct device *dev = &adapter->vdev->dev;
2445         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2446         struct ibmvnic_login_buffer *login = adapter->login_buf;
2447         union ibmvnic_crq crq;
2448         int i;
2449
2450         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2451                          DMA_BIDIRECTIONAL);
2452         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2453                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2454
2455         /* If the number of queues requested can't be allocated by the
2456          * server, the login response will return with code 1. We will need
2457          * to resend the login buffer with fewer queues requested.
2458          */
2459         if (login_rsp_crq->generic.rc.code) {
2460                 adapter->renegotiate = true;
2461                 complete(&adapter->init_done);
2462                 return 0;
2463         }
2464
2465         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2466         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2467                 netdev_dbg(adapter->netdev, "%016lx\n",
2468                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2469         }
2470
2471         /* Sanity checks */
2472         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2473             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2474              adapter->req_rx_add_queues !=
2475              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2476                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2477                 ibmvnic_remove(adapter->vdev);
2478                 return -EIO;
2479         }
2480         complete(&adapter->init_done);
2481
2482         memset(&crq, 0, sizeof(crq));
2483         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2484         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2485         ibmvnic_send_crq(adapter, &crq);
2486
2487         return 0;
2488 }
2489
2490 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2491                                    struct ibmvnic_adapter *adapter)
2492 {
2493         struct device *dev = &adapter->vdev->dev;
2494         u8 map_id = crq->request_map_rsp.map_id;
2495         int tx_subcrqs;
2496         int rx_subcrqs;
2497         long rc;
2498         int i;
2499
2500         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2501         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2502
2503         rc = crq->request_map_rsp.rc.code;
2504         if (rc) {
2505                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2506                 adapter->map_id--;
2507                 /* need to find and zero tx/rx_pool map_id */
2508                 for (i = 0; i < tx_subcrqs; i++) {
2509                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2510                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2511                 }
2512                 for (i = 0; i < rx_subcrqs; i++) {
2513                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2514                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2515                 }
2516         }
2517         complete(&adapter->fw_done);
2518 }
2519
2520 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2521                                      struct ibmvnic_adapter *adapter)
2522 {
2523         struct device *dev = &adapter->vdev->dev;
2524         long rc;
2525
2526         rc = crq->request_unmap_rsp.rc.code;
2527         if (rc)
2528                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2529 }
2530
2531 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2532                                  struct ibmvnic_adapter *adapter)
2533 {
2534         struct net_device *netdev = adapter->netdev;
2535         struct device *dev = &adapter->vdev->dev;
2536         long rc;
2537
2538         rc = crq->query_map_rsp.rc.code;
2539         if (rc) {
2540                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2541                 return;
2542         }
2543         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2544                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2545                    crq->query_map_rsp.free_pages);
2546 }
2547
2548 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2549                                  struct ibmvnic_adapter *adapter)
2550 {
2551         struct net_device *netdev = adapter->netdev;
2552         struct device *dev = &adapter->vdev->dev;
2553         long rc;
2554
2555         atomic_dec(&adapter->running_cap_queries);
2556         netdev_dbg(netdev, "Outstanding queries: %d\n",
2557                    atomic_read(&adapter->running_cap_queries));
2558         rc = crq->query_capability.rc.code;
2559         if (rc) {
2560                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2561                 goto out;
2562         }
2563
2564         switch (be16_to_cpu(crq->query_capability.capability)) {
2565         case MIN_TX_QUEUES:
2566                 adapter->min_tx_queues =
2567                     be64_to_cpu(crq->query_capability.number);
2568                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2569                            adapter->min_tx_queues);
2570                 break;
2571         case MIN_RX_QUEUES:
2572                 adapter->min_rx_queues =
2573                     be64_to_cpu(crq->query_capability.number);
2574                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2575                            adapter->min_rx_queues);
2576                 break;
2577         case MIN_RX_ADD_QUEUES:
2578                 adapter->min_rx_add_queues =
2579                     be64_to_cpu(crq->query_capability.number);
2580                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2581                            adapter->min_rx_add_queues);
2582                 break;
2583         case MAX_TX_QUEUES:
2584                 adapter->max_tx_queues =
2585                     be64_to_cpu(crq->query_capability.number);
2586                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2587                            adapter->max_tx_queues);
2588                 break;
2589         case MAX_RX_QUEUES:
2590                 adapter->max_rx_queues =
2591                     be64_to_cpu(crq->query_capability.number);
2592                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2593                            adapter->max_rx_queues);
2594                 break;
2595         case MAX_RX_ADD_QUEUES:
2596                 adapter->max_rx_add_queues =
2597                     be64_to_cpu(crq->query_capability.number);
2598                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2599                            adapter->max_rx_add_queues);
2600                 break;
2601         case MIN_TX_ENTRIES_PER_SUBCRQ:
2602                 adapter->min_tx_entries_per_subcrq =
2603                     be64_to_cpu(crq->query_capability.number);
2604                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2605                            adapter->min_tx_entries_per_subcrq);
2606                 break;
2607         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2608                 adapter->min_rx_add_entries_per_subcrq =
2609                     be64_to_cpu(crq->query_capability.number);
2610                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2611                            adapter->min_rx_add_entries_per_subcrq);
2612                 break;
2613         case MAX_TX_ENTRIES_PER_SUBCRQ:
2614                 adapter->max_tx_entries_per_subcrq =
2615                     be64_to_cpu(crq->query_capability.number);
2616                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2617                            adapter->max_tx_entries_per_subcrq);
2618                 break;
2619         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2620                 adapter->max_rx_add_entries_per_subcrq =
2621                     be64_to_cpu(crq->query_capability.number);
2622                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2623                            adapter->max_rx_add_entries_per_subcrq);
2624                 break;
2625         case TCP_IP_OFFLOAD:
2626                 adapter->tcp_ip_offload =
2627                     be64_to_cpu(crq->query_capability.number);
2628                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2629                            adapter->tcp_ip_offload);
2630                 break;
2631         case PROMISC_SUPPORTED:
2632                 adapter->promisc_supported =
2633                     be64_to_cpu(crq->query_capability.number);
2634                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2635                            adapter->promisc_supported);
2636                 break;
2637         case MIN_MTU:
2638                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2639                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2640                 break;
2641         case MAX_MTU:
2642                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2643                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2644                 break;
2645         case MAX_MULTICAST_FILTERS:
2646                 adapter->max_multicast_filters =
2647                     be64_to_cpu(crq->query_capability.number);
2648                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2649                            adapter->max_multicast_filters);
2650                 break;
2651         case VLAN_HEADER_INSERTION:
2652                 adapter->vlan_header_insertion =
2653                     be64_to_cpu(crq->query_capability.number);
2654                 if (adapter->vlan_header_insertion)
2655                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2656                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2657                            adapter->vlan_header_insertion);
2658                 break;
2659         case MAX_TX_SG_ENTRIES:
2660                 adapter->max_tx_sg_entries =
2661                     be64_to_cpu(crq->query_capability.number);
2662                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2663                            adapter->max_tx_sg_entries);
2664                 break;
2665         case RX_SG_SUPPORTED:
2666                 adapter->rx_sg_supported =
2667                     be64_to_cpu(crq->query_capability.number);
2668                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2669                            adapter->rx_sg_supported);
2670                 break;
2671         case OPT_TX_COMP_SUB_QUEUES:
2672                 adapter->opt_tx_comp_sub_queues =
2673                     be64_to_cpu(crq->query_capability.number);
2674                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2675                            adapter->opt_tx_comp_sub_queues);
2676                 break;
2677         case OPT_RX_COMP_QUEUES:
2678                 adapter->opt_rx_comp_queues =
2679                     be64_to_cpu(crq->query_capability.number);
2680                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2681                            adapter->opt_rx_comp_queues);
2682                 break;
2683         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2684                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2685                     be64_to_cpu(crq->query_capability.number);
2686                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2687                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2688                 break;
2689         case OPT_TX_ENTRIES_PER_SUBCRQ:
2690                 adapter->opt_tx_entries_per_subcrq =
2691                     be64_to_cpu(crq->query_capability.number);
2692                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2693                            adapter->opt_tx_entries_per_subcrq);
2694                 break;
2695         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2696                 adapter->opt_rxba_entries_per_subcrq =
2697                     be64_to_cpu(crq->query_capability.number);
2698                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2699                            adapter->opt_rxba_entries_per_subcrq);
2700                 break;
2701         case TX_RX_DESC_REQ:
2702                 adapter->tx_rx_desc_req = crq->query_capability.number;
2703                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2704                            adapter->tx_rx_desc_req);
2705                 break;
2706
2707         default:
2708                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2709                            crq->query_capability.capability);
2710         }
2711
2712 out:
2713         if (atomic_read(&adapter->running_cap_queries) == 0)
2714                 init_sub_crqs(adapter, 0);
2715                 /* We're done querying the capabilities, initialize sub-crqs */
2716 }
2717
2718 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2719                                    struct ibmvnic_adapter *adapter)
2720 {
2721         u8 correlator = crq->control_ras_rsp.correlator;
2722         struct device *dev = &adapter->vdev->dev;
2723         bool found = false;
2724         int i;
2725
2726         if (crq->control_ras_rsp.rc.code) {
2727                 dev_warn(dev, "Control ras failed rc=%d\n",
2728                          crq->control_ras_rsp.rc.code);
2729                 return;
2730         }
2731
2732         for (i = 0; i < adapter->ras_comp_num; i++) {
2733                 if (adapter->ras_comps[i].correlator == correlator) {
2734                         found = true;
2735                         break;
2736                 }
2737         }
2738
2739         if (!found) {
2740                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2741                 return;
2742         }
2743
2744         switch (crq->control_ras_rsp.op) {
2745         case IBMVNIC_TRACE_LEVEL:
2746                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2747                 break;
2748         case IBMVNIC_ERROR_LEVEL:
2749                 adapter->ras_comps[i].error_check_level =
2750                     crq->control_ras.level;
2751                 break;
2752         case IBMVNIC_TRACE_PAUSE:
2753                 adapter->ras_comp_int[i].paused = 1;
2754                 break;
2755         case IBMVNIC_TRACE_RESUME:
2756                 adapter->ras_comp_int[i].paused = 0;
2757                 break;
2758         case IBMVNIC_TRACE_ON:
2759                 adapter->ras_comps[i].trace_on = 1;
2760                 break;
2761         case IBMVNIC_TRACE_OFF:
2762                 adapter->ras_comps[i].trace_on = 0;
2763                 break;
2764         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2765                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2766                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2767                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2768                     crq->control_ras_rsp.trace_buff_sz[0];
2769                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2770                     crq->control_ras_rsp.trace_buff_sz[1];
2771                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2772                     crq->control_ras_rsp.trace_buff_sz[2];
2773                 break;
2774         default:
2775                 dev_err(dev, "invalid op %d on control_ras_rsp",
2776                         crq->control_ras_rsp.op);
2777         }
2778 }
2779
2780 static int ibmvnic_fw_comp_open(struct inode *inode, struct file *file)
2781 {
2782         file->private_data = inode->i_private;
2783         return 0;
2784 }
2785
2786 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2787                           loff_t *ppos)
2788 {
2789         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2790         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2791         struct device *dev = &adapter->vdev->dev;
2792         struct ibmvnic_fw_trace_entry *trace;
2793         int num = ras_comp_int->num;
2794         union ibmvnic_crq crq;
2795         dma_addr_t trace_tok;
2796
2797         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2798                 return 0;
2799
2800         trace =
2801             dma_alloc_coherent(dev,
2802                                be32_to_cpu(adapter->ras_comps[num].
2803                                            trace_buff_size), &trace_tok,
2804                                GFP_KERNEL);
2805         if (!trace) {
2806                 dev_err(dev, "Couldn't alloc trace buffer\n");
2807                 return 0;
2808         }
2809
2810         memset(&crq, 0, sizeof(crq));
2811         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2812         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2813         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2814         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2815         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2816         ibmvnic_send_crq(adapter, &crq);
2817
2818         init_completion(&adapter->fw_done);
2819         wait_for_completion(&adapter->fw_done);
2820
2821         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2822                 len =
2823                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2824                     *ppos;
2825
2826         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2827
2828         dma_free_coherent(dev,
2829                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2830                           trace, trace_tok);
2831         *ppos += len;
2832         return len;
2833 }
2834
2835 static const struct file_operations trace_ops = {
2836         .owner          = THIS_MODULE,
2837         .open           = ibmvnic_fw_comp_open,
2838         .read           = trace_read,
2839 };
2840
2841 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2842                            loff_t *ppos)
2843 {
2844         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2845         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2846         int num = ras_comp_int->num;
2847         char buff[5]; /*  1 or 0 plus \n and \0 */
2848         int size;
2849
2850         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2851
2852         if (*ppos >= size)
2853                 return 0;
2854
2855         copy_to_user(user_buf, buff, size);
2856         *ppos += size;
2857         return size;
2858 }
2859
2860 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2861                             size_t len, loff_t *ppos)
2862 {
2863         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2864         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2865         int num = ras_comp_int->num;
2866         union ibmvnic_crq crq;
2867         unsigned long val;
2868         char buff[9]; /* decimal max int plus \n and \0 */
2869
2870         copy_from_user(buff, user_buf, sizeof(buff));
2871         val = kstrtoul(buff, 10, NULL);
2872
2873         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2874
2875         memset(&crq, 0, sizeof(crq));
2876         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2877         crq.control_ras.cmd = CONTROL_RAS;
2878         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2879         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2880         ibmvnic_send_crq(adapter, &crq);
2881
2882         return len;
2883 }
2884
2885 static const struct file_operations paused_ops = {
2886         .owner          = THIS_MODULE,
2887         .open           = ibmvnic_fw_comp_open,
2888         .read           = paused_read,
2889         .write          = paused_write,
2890 };
2891
2892 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2893                             size_t len, loff_t *ppos)
2894 {
2895         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2896         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2897         int num = ras_comp_int->num;
2898         char buff[5]; /*  1 or 0 plus \n and \0 */
2899         int size;
2900
2901         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2902
2903         if (*ppos >= size)
2904                 return 0;
2905
2906         copy_to_user(user_buf, buff, size);
2907         *ppos += size;
2908         return size;
2909 }
2910
2911 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2912                              size_t len, loff_t *ppos)
2913 {
2914         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2915         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2916         int num = ras_comp_int->num;
2917         union ibmvnic_crq crq;
2918         unsigned long val;
2919         char buff[9]; /* decimal max int plus \n and \0 */
2920
2921         copy_from_user(buff, user_buf, sizeof(buff));
2922         val = kstrtoul(buff, 10, NULL);
2923
2924         memset(&crq, 0, sizeof(crq));
2925         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2926         crq.control_ras.cmd = CONTROL_RAS;
2927         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2928         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2929
2930         return len;
2931 }
2932
2933 static const struct file_operations tracing_ops = {
2934         .owner          = THIS_MODULE,
2935         .open           = ibmvnic_fw_comp_open,
2936         .read           = tracing_read,
2937         .write          = tracing_write,
2938 };
2939
2940 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2941                                 size_t len, loff_t *ppos)
2942 {
2943         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2944         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2945         int num = ras_comp_int->num;
2946         char buff[5]; /* decimal max char plus \n and \0 */
2947         int size;
2948
2949         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2950
2951         if (*ppos >= size)
2952                 return 0;
2953
2954         copy_to_user(user_buf, buff, size);
2955         *ppos += size;
2956         return size;
2957 }
2958
2959 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2960                                  size_t len, loff_t *ppos)
2961 {
2962         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2963         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2964         int num = ras_comp_int->num;
2965         union ibmvnic_crq crq;
2966         unsigned long val;
2967         char buff[9]; /* decimal max int plus \n and \0 */
2968
2969         copy_from_user(buff, user_buf, sizeof(buff));
2970         val = kstrtoul(buff, 10, NULL);
2971
2972         if (val > 9)
2973                 val = 9;
2974
2975         memset(&crq, 0, sizeof(crq));
2976         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2977         crq.control_ras.cmd = CONTROL_RAS;
2978         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2979         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2980         crq.control_ras.level = val;
2981         ibmvnic_send_crq(adapter, &crq);
2982
2983         return len;
2984 }
2985
2986 static const struct file_operations error_level_ops = {
2987         .owner          = THIS_MODULE,
2988         .open           = ibmvnic_fw_comp_open,
2989         .read           = error_level_read,
2990         .write          = error_level_write,
2991 };
2992
2993 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2994                                 size_t len, loff_t *ppos)
2995 {
2996         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2997         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2998         int num = ras_comp_int->num;
2999         char buff[5]; /* decimal max char plus \n and \0 */
3000         int size;
3001
3002         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
3003         if (*ppos >= size)
3004                 return 0;
3005
3006         copy_to_user(user_buf, buff, size);
3007         *ppos += size;
3008         return size;
3009 }
3010
3011 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3012                                  size_t len, loff_t *ppos)
3013 {
3014         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3015         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3016         union ibmvnic_crq crq;
3017         unsigned long val;
3018         char buff[9]; /* decimal max int plus \n and \0 */
3019
3020         copy_from_user(buff, user_buf, sizeof(buff));
3021         val = kstrtoul(buff, 10, NULL);
3022         if (val > 9)
3023                 val = 9;
3024
3025         memset(&crq, 0, sizeof(crq));
3026         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3027         crq.control_ras.cmd = CONTROL_RAS;
3028         crq.control_ras.correlator =
3029             adapter->ras_comps[ras_comp_int->num].correlator;
3030         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3031         crq.control_ras.level = val;
3032         ibmvnic_send_crq(adapter, &crq);
3033
3034         return len;
3035 }
3036
3037 static const struct file_operations trace_level_ops = {
3038         .owner          = THIS_MODULE,
3039         .open           = ibmvnic_fw_comp_open,
3040         .read           = trace_level_read,
3041         .write          = trace_level_write,
3042 };
3043
3044 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3045                                     size_t len, loff_t *ppos)
3046 {
3047         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3048         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3049         int num = ras_comp_int->num;
3050         char buff[9]; /* decimal max int plus \n and \0 */
3051         int size;
3052
3053         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3054         if (*ppos >= size)
3055                 return 0;
3056
3057         copy_to_user(user_buf, buff, size);
3058         *ppos += size;
3059         return size;
3060 }
3061
3062 static ssize_t trace_buff_size_write(struct file *file,
3063                                      const char __user *user_buf, size_t len,
3064                                      loff_t *ppos)
3065 {
3066         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3067         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3068         union ibmvnic_crq crq;
3069         unsigned long val;
3070         char buff[9]; /* decimal max int plus \n and \0 */
3071
3072         copy_from_user(buff, user_buf, sizeof(buff));
3073         val = kstrtoul(buff, 10, NULL);
3074
3075         memset(&crq, 0, sizeof(crq));
3076         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3077         crq.control_ras.cmd = CONTROL_RAS;
3078         crq.control_ras.correlator =
3079             adapter->ras_comps[ras_comp_int->num].correlator;
3080         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3081         /* trace_buff_sz is 3 bytes, stuff an int into it */
3082         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3083         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3084         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3085         ibmvnic_send_crq(adapter, &crq);
3086
3087         return len;
3088 }
3089
3090 static const struct file_operations trace_size_ops = {
3091         .owner          = THIS_MODULE,
3092         .open           = ibmvnic_fw_comp_open,
3093         .read           = trace_buff_size_read,
3094         .write          = trace_buff_size_write,
3095 };
3096
3097 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3098                                          struct ibmvnic_adapter *adapter)
3099 {
3100         struct device *dev = &adapter->vdev->dev;
3101         struct dentry *dir_ent;
3102         struct dentry *ent;
3103         int i;
3104
3105         debugfs_remove_recursive(adapter->ras_comps_ent);
3106
3107         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3108                                                     adapter->debugfs_dir);
3109         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3110                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3111                 return;
3112         }
3113
3114         for (i = 0; i < adapter->ras_comp_num; i++) {
3115                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3116                                              adapter->ras_comps_ent);
3117                 if (!dir_ent || IS_ERR(dir_ent)) {
3118                         dev_info(dev, "debugfs create %s dir failed\n",
3119                                  adapter->ras_comps[i].name);
3120                         continue;
3121                 }
3122
3123                 adapter->ras_comp_int[i].adapter = adapter;
3124                 adapter->ras_comp_int[i].num = i;
3125                 adapter->ras_comp_int[i].desc_blob.data =
3126                     &adapter->ras_comps[i].description;
3127                 adapter->ras_comp_int[i].desc_blob.size =
3128                     sizeof(adapter->ras_comps[i].description);
3129
3130                 /* Don't need to remember the dentry's because the debugfs dir
3131                  * gets removed recursively
3132                  */
3133                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3134                                           &adapter->ras_comp_int[i].desc_blob);
3135                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3136                                           dir_ent, &adapter->ras_comp_int[i],
3137                                           &trace_size_ops);
3138                 ent = debugfs_create_file("trace_level",
3139                                           S_IRUGO |
3140                                           (adapter->ras_comps[i].trace_level !=
3141                                            0xFF  ? S_IWUSR : 0),
3142                                            dir_ent, &adapter->ras_comp_int[i],
3143                                            &trace_level_ops);
3144                 ent = debugfs_create_file("error_level",
3145                                           S_IRUGO |
3146                                           (adapter->
3147                                            ras_comps[i].error_check_level !=
3148                                            0xFF ? S_IWUSR : 0),
3149                                           dir_ent, &adapter->ras_comp_int[i],
3150                                           &trace_level_ops);
3151                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3152                                           dir_ent, &adapter->ras_comp_int[i],
3153                                           &tracing_ops);
3154                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3155                                           dir_ent, &adapter->ras_comp_int[i],
3156                                           &paused_ops);
3157                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3158                                           &adapter->ras_comp_int[i],
3159                                           &trace_ops);
3160         }
3161 }
3162
3163 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3164                                             struct ibmvnic_adapter *adapter)
3165 {
3166         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3167         struct device *dev = &adapter->vdev->dev;
3168         union ibmvnic_crq newcrq;
3169
3170         adapter->ras_comps = dma_alloc_coherent(dev, len,
3171                                                 &adapter->ras_comps_tok,
3172                                                 GFP_KERNEL);
3173         if (!adapter->ras_comps) {
3174                 if (!firmware_has_feature(FW_FEATURE_CMO))
3175                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3176                 return;
3177         }
3178
3179         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3180                                         sizeof(struct ibmvnic_fw_comp_internal),
3181                                         GFP_KERNEL);
3182         if (!adapter->ras_comp_int)
3183                 dma_free_coherent(dev, len, adapter->ras_comps,
3184                                   adapter->ras_comps_tok);
3185
3186         memset(&newcrq, 0, sizeof(newcrq));
3187         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3188         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3189         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3190         newcrq.request_ras_comps.len = cpu_to_be32(len);
3191         ibmvnic_send_crq(adapter, &newcrq);
3192 }
3193
3194 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3195 {
3196         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3197         struct device *dev = &adapter->vdev->dev;
3198         struct ibmvnic_error_buff *error_buff, *tmp2;
3199         unsigned long flags;
3200         unsigned long flags2;
3201
3202         spin_lock_irqsave(&adapter->inflight_lock, flags);
3203         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3204                 switch (inflight_cmd->crq.generic.cmd) {
3205                 case LOGIN:
3206                         dma_unmap_single(dev, adapter->login_buf_token,
3207                                          adapter->login_buf_sz,
3208                                          DMA_BIDIRECTIONAL);
3209                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3210                                          adapter->login_rsp_buf_sz,
3211                                          DMA_BIDIRECTIONAL);
3212                         kfree(adapter->login_rsp_buf);
3213                         kfree(adapter->login_buf);
3214                         break;
3215                 case REQUEST_DUMP:
3216                         complete(&adapter->fw_done);
3217                         break;
3218                 case REQUEST_ERROR_INFO:
3219                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3220                         list_for_each_entry_safe(error_buff, tmp2,
3221                                                  &adapter->errors, list) {
3222                                 dma_unmap_single(dev, error_buff->dma,
3223                                                  error_buff->len,
3224                                                  DMA_FROM_DEVICE);
3225                                 kfree(error_buff->buff);
3226                                 list_del(&error_buff->list);
3227                                 kfree(error_buff);
3228                         }
3229                         spin_unlock_irqrestore(&adapter->error_list_lock,
3230                                                flags2);
3231                         break;
3232                 }
3233                 list_del(&inflight_cmd->list);
3234                 kfree(inflight_cmd);
3235         }
3236         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3237 }
3238
3239 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3240                                struct ibmvnic_adapter *adapter)
3241 {
3242         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3243         struct net_device *netdev = adapter->netdev;
3244         struct device *dev = &adapter->vdev->dev;
3245         long rc;
3246
3247         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3248                    ((unsigned long int *)crq)[0],
3249                    ((unsigned long int *)crq)[1]);
3250         switch (gen_crq->first) {
3251         case IBMVNIC_CRQ_INIT_RSP:
3252                 switch (gen_crq->cmd) {
3253                 case IBMVNIC_CRQ_INIT:
3254                         dev_info(dev, "Partner initialized\n");
3255                         /* Send back a response */
3256                         rc = ibmvnic_send_crq_init_complete(adapter);
3257                         if (!rc)
3258                                 schedule_work(&adapter->vnic_crq_init);
3259                         else
3260                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3261                         break;
3262                 case IBMVNIC_CRQ_INIT_COMPLETE:
3263                         dev_info(dev, "Partner initialization complete\n");
3264                         send_version_xchg(adapter);
3265                         break;
3266                 default:
3267                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3268                 }
3269                 return;
3270         case IBMVNIC_CRQ_XPORT_EVENT:
3271                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3272                         dev_info(dev, "Re-enabling adapter\n");
3273                         adapter->migrated = true;
3274                         ibmvnic_free_inflight(adapter);
3275                         release_sub_crqs(adapter);
3276                         rc = ibmvnic_reenable_crq_queue(adapter);
3277                         if (rc)
3278                                 dev_err(dev, "Error after enable rc=%ld\n", rc);
3279                         adapter->migrated = false;
3280                         rc = ibmvnic_send_crq_init(adapter);
3281                         if (rc)
3282                                 dev_err(dev, "Error sending init rc=%ld\n", rc);
3283                 } else {
3284                         /* The adapter lost the connection */
3285                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3286                                 gen_crq->cmd);
3287                         ibmvnic_free_inflight(adapter);
3288                         release_sub_crqs(adapter);
3289                 }
3290                 return;
3291         case IBMVNIC_CRQ_CMD_RSP:
3292                 break;
3293         default:
3294                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3295                         gen_crq->first);
3296                 return;
3297         }
3298
3299         switch (gen_crq->cmd) {
3300         case VERSION_EXCHANGE_RSP:
3301                 rc = crq->version_exchange_rsp.rc.code;
3302                 if (rc) {
3303                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3304                         break;
3305                 }
3306                 dev_info(dev, "Partner protocol version is %d\n",
3307                          crq->version_exchange_rsp.version);
3308                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3309                     ibmvnic_version)
3310                         ibmvnic_version =
3311                             be16_to_cpu(crq->version_exchange_rsp.version);
3312                 send_cap_queries(adapter);
3313                 break;
3314         case QUERY_CAPABILITY_RSP:
3315                 handle_query_cap_rsp(crq, adapter);
3316                 break;
3317         case QUERY_MAP_RSP:
3318                 handle_query_map_rsp(crq, adapter);
3319                 break;
3320         case REQUEST_MAP_RSP:
3321                 handle_request_map_rsp(crq, adapter);
3322                 break;
3323         case REQUEST_UNMAP_RSP:
3324                 handle_request_unmap_rsp(crq, adapter);
3325                 break;
3326         case REQUEST_CAPABILITY_RSP:
3327                 handle_request_cap_rsp(crq, adapter);
3328                 break;
3329         case LOGIN_RSP:
3330                 netdev_dbg(netdev, "Got Login Response\n");
3331                 handle_login_rsp(crq, adapter);
3332                 break;
3333         case LOGICAL_LINK_STATE_RSP:
3334                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3335                 adapter->logical_link_state =
3336                     crq->logical_link_state_rsp.link_state;
3337                 break;
3338         case LINK_STATE_INDICATION:
3339                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3340                 adapter->phys_link_state =
3341                     crq->link_state_indication.phys_link_state;
3342                 adapter->logical_link_state =
3343                     crq->link_state_indication.logical_link_state;
3344                 break;
3345         case CHANGE_MAC_ADDR_RSP:
3346                 netdev_dbg(netdev, "Got MAC address change Response\n");
3347                 handle_change_mac_rsp(crq, adapter);
3348                 break;
3349         case ERROR_INDICATION:
3350                 netdev_dbg(netdev, "Got Error Indication\n");
3351                 handle_error_indication(crq, adapter);
3352                 break;
3353         case REQUEST_ERROR_RSP:
3354                 netdev_dbg(netdev, "Got Error Detail Response\n");
3355                 handle_error_info_rsp(crq, adapter);
3356                 break;
3357         case REQUEST_STATISTICS_RSP:
3358                 netdev_dbg(netdev, "Got Statistics Response\n");
3359                 complete(&adapter->stats_done);
3360                 break;
3361         case REQUEST_DUMP_SIZE_RSP:
3362                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3363                 handle_dump_size_rsp(crq, adapter);
3364                 break;
3365         case REQUEST_DUMP_RSP:
3366                 netdev_dbg(netdev, "Got Request Dump Response\n");
3367                 complete(&adapter->fw_done);
3368                 break;
3369         case QUERY_IP_OFFLOAD_RSP:
3370                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3371                 handle_query_ip_offload_rsp(adapter);
3372                 break;
3373         case MULTICAST_CTRL_RSP:
3374                 netdev_dbg(netdev, "Got multicast control Response\n");
3375                 break;
3376         case CONTROL_IP_OFFLOAD_RSP:
3377                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3378                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3379                                  sizeof(adapter->ip_offload_ctrl),
3380                                  DMA_TO_DEVICE);
3381                 /* We're done with the queries, perform the login */
3382                 send_login(adapter);
3383                 break;
3384         case REQUEST_RAS_COMP_NUM_RSP:
3385                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3386                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3387                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3388                         break;
3389                 }
3390                 adapter->ras_comp_num =
3391                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3392                 handle_request_ras_comp_num_rsp(crq, adapter);
3393                 break;
3394         case REQUEST_RAS_COMPS_RSP:
3395                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3396                 handle_request_ras_comps_rsp(crq, adapter);
3397                 break;
3398         case CONTROL_RAS_RSP:
3399                 netdev_dbg(netdev, "Got Control RAS Response\n");
3400                 handle_control_ras_rsp(crq, adapter);
3401                 break;
3402         case COLLECT_FW_TRACE_RSP:
3403                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3404                 complete(&adapter->fw_done);
3405                 break;
3406         default:
3407                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3408                            gen_crq->cmd);
3409         }
3410 }
3411
3412 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3413 {
3414         struct ibmvnic_adapter *adapter = instance;
3415         struct ibmvnic_crq_queue *queue = &adapter->crq;
3416         struct vio_dev *vdev = adapter->vdev;
3417         union ibmvnic_crq *crq;
3418         unsigned long flags;
3419         bool done = false;
3420
3421         spin_lock_irqsave(&queue->lock, flags);
3422         vio_disable_interrupts(vdev);
3423         while (!done) {
3424                 /* Pull all the valid messages off the CRQ */
3425                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3426                         ibmvnic_handle_crq(crq, adapter);
3427                         crq->generic.first = 0;
3428                 }
3429                 vio_enable_interrupts(vdev);
3430                 crq = ibmvnic_next_crq(adapter);
3431                 if (crq) {
3432                         vio_disable_interrupts(vdev);
3433                         ibmvnic_handle_crq(crq, adapter);
3434                         crq->generic.first = 0;
3435                 } else {
3436                         done = true;
3437                 }
3438         }
3439         spin_unlock_irqrestore(&queue->lock, flags);
3440         return IRQ_HANDLED;
3441 }
3442
3443 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3444 {
3445         struct vio_dev *vdev = adapter->vdev;
3446         int rc;
3447
3448         do {
3449                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3450         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3451
3452         if (rc)
3453                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3454
3455         return rc;
3456 }
3457
3458 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3459 {
3460         struct ibmvnic_crq_queue *crq = &adapter->crq;
3461         struct device *dev = &adapter->vdev->dev;
3462         struct vio_dev *vdev = adapter->vdev;
3463         int rc;
3464
3465         /* Close the CRQ */
3466         do {
3467                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3468         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3469
3470         /* Clean out the queue */
3471         memset(crq->msgs, 0, PAGE_SIZE);
3472         crq->cur = 0;
3473
3474         /* And re-open it again */
3475         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3476                                 crq->msg_token, PAGE_SIZE);
3477
3478         if (rc == H_CLOSED)
3479                 /* Adapter is good, but other end is not ready */
3480                 dev_warn(dev, "Partner adapter not ready\n");
3481         else if (rc != 0)
3482                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3483
3484         return rc;
3485 }
3486
3487 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3488 {
3489         struct ibmvnic_crq_queue *crq = &adapter->crq;
3490         struct vio_dev *vdev = adapter->vdev;
3491         long rc;
3492
3493         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3494         free_irq(vdev->irq, adapter);
3495         do {
3496                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3497         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3498
3499         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3500                          DMA_BIDIRECTIONAL);
3501         free_page((unsigned long)crq->msgs);
3502 }
3503
3504 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3505 {
3506         struct ibmvnic_crq_queue *crq = &adapter->crq;
3507         struct device *dev = &adapter->vdev->dev;
3508         struct vio_dev *vdev = adapter->vdev;
3509         int rc, retrc = -ENOMEM;
3510
3511         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3512         /* Should we allocate more than one page? */
3513
3514         if (!crq->msgs)
3515                 return -ENOMEM;
3516
3517         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3518         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3519                                         DMA_BIDIRECTIONAL);
3520         if (dma_mapping_error(dev, crq->msg_token))
3521                 goto map_failed;
3522
3523         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3524                                 crq->msg_token, PAGE_SIZE);
3525
3526         if (rc == H_RESOURCE)
3527                 /* maybe kexecing and resource is busy. try a reset */
3528                 rc = ibmvnic_reset_crq(adapter);
3529         retrc = rc;
3530
3531         if (rc == H_CLOSED) {
3532                 dev_warn(dev, "Partner adapter not ready\n");
3533         } else if (rc) {
3534                 dev_warn(dev, "Error %d opening adapter\n", rc);
3535                 goto reg_crq_failed;
3536         }
3537
3538         retrc = 0;
3539
3540         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3541         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3542                          adapter);
3543         if (rc) {
3544                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3545                         vdev->irq, rc);
3546                 goto req_irq_failed;
3547         }
3548
3549         rc = vio_enable_interrupts(vdev);
3550         if (rc) {
3551                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3552                 goto req_irq_failed;
3553         }
3554
3555         crq->cur = 0;
3556         spin_lock_init(&crq->lock);
3557
3558         return retrc;
3559
3560 req_irq_failed:
3561         do {
3562                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3563         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3564 reg_crq_failed:
3565         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3566 map_failed:
3567         free_page((unsigned long)crq->msgs);
3568         return retrc;
3569 }
3570
3571 /* debugfs for dump */
3572 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3573 {
3574         struct net_device *netdev = seq->private;
3575         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3576         struct device *dev = &adapter->vdev->dev;
3577         union ibmvnic_crq crq;
3578
3579         memset(&crq, 0, sizeof(crq));
3580         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3581         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3582         ibmvnic_send_crq(adapter, &crq);
3583
3584         init_completion(&adapter->fw_done);
3585         wait_for_completion(&adapter->fw_done);
3586
3587         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3588
3589         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3590                          DMA_BIDIRECTIONAL);
3591
3592         kfree(adapter->dump_data);
3593
3594         return 0;
3595 }
3596
3597 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3598 {
3599         return single_open(file, ibmvnic_dump_show, inode->i_private);
3600 }
3601
3602 static const struct file_operations ibmvnic_dump_ops = {
3603         .owner          = THIS_MODULE,
3604         .open           = ibmvnic_dump_open,
3605         .read           = seq_read,
3606         .llseek         = seq_lseek,
3607         .release        = single_release,
3608 };
3609
3610 static void handle_crq_init_rsp(struct work_struct *work)
3611 {
3612         struct ibmvnic_adapter *adapter = container_of(work,
3613                                                        struct ibmvnic_adapter,
3614                                                        vnic_crq_init);
3615         struct device *dev = &adapter->vdev->dev;
3616         struct net_device *netdev = adapter->netdev;
3617         unsigned long timeout = msecs_to_jiffies(30000);
3618         int rc;
3619
3620         send_version_xchg(adapter);
3621         reinit_completion(&adapter->init_done);
3622         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3623                 dev_err(dev, "Passive init timeout\n");
3624                 goto task_failed;
3625         }
3626
3627         do {
3628                 if (adapter->renegotiate) {
3629                         adapter->renegotiate = false;
3630                         release_sub_crqs_no_irqs(adapter);
3631                         send_cap_queries(adapter);
3632
3633                         reinit_completion(&adapter->init_done);
3634                         if (!wait_for_completion_timeout(&adapter->init_done,
3635                                                          timeout)) {
3636                                 dev_err(dev, "Passive init timeout\n");
3637                                 goto task_failed;
3638                         }
3639                 }
3640         } while (adapter->renegotiate);
3641         rc = init_sub_crq_irqs(adapter);
3642
3643         if (rc)
3644                 goto task_failed;
3645
3646         netdev->real_num_tx_queues = adapter->req_tx_queues;
3647
3648         rc = register_netdev(netdev);
3649         if (rc) {
3650                 dev_err(dev,
3651                         "failed to register netdev rc=%d\n", rc);
3652                 goto register_failed;
3653         }
3654         dev_info(dev, "ibmvnic registered\n");
3655
3656         return;
3657
3658 register_failed:
3659         release_sub_crqs(adapter);
3660 task_failed:
3661         dev_err(dev, "Passive initialization was not successful\n");
3662 }
3663
3664 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3665 {
3666         unsigned long timeout = msecs_to_jiffies(30000);
3667         struct ibmvnic_adapter *adapter;
3668         struct net_device *netdev;
3669         unsigned char *mac_addr_p;
3670         struct dentry *ent;
3671         char buf[16]; /* debugfs name buf */
3672         int rc;
3673
3674         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3675                 dev->unit_address);
3676
3677         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3678                                                         VETH_MAC_ADDR, NULL);
3679         if (!mac_addr_p) {
3680                 dev_err(&dev->dev,
3681                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3682                         __FILE__, __LINE__);
3683                 return 0;
3684         }
3685
3686         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3687                                    IBMVNIC_MAX_TX_QUEUES);
3688         if (!netdev)
3689                 return -ENOMEM;
3690
3691         adapter = netdev_priv(netdev);
3692         dev_set_drvdata(&dev->dev, netdev);
3693         adapter->vdev = dev;
3694         adapter->netdev = netdev;
3695
3696         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3697         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3698         netdev->irq = dev->irq;
3699         netdev->netdev_ops = &ibmvnic_netdev_ops;
3700         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3701         SET_NETDEV_DEV(netdev, &dev->dev);
3702
3703         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3704
3705         spin_lock_init(&adapter->stats_lock);
3706
3707         rc = ibmvnic_init_crq_queue(adapter);
3708         if (rc) {
3709                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3710                 goto free_netdev;
3711         }
3712
3713         INIT_LIST_HEAD(&adapter->errors);
3714         INIT_LIST_HEAD(&adapter->inflight);
3715         spin_lock_init(&adapter->error_list_lock);
3716         spin_lock_init(&adapter->inflight_lock);
3717
3718         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3719                                               sizeof(struct ibmvnic_statistics),
3720                                               DMA_FROM_DEVICE);
3721         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3722                 if (!firmware_has_feature(FW_FEATURE_CMO))
3723                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3724                 goto free_crq;
3725         }
3726
3727         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3728         ent = debugfs_create_dir(buf, NULL);
3729         if (!ent || IS_ERR(ent)) {
3730                 dev_info(&dev->dev, "debugfs create directory failed\n");
3731                 adapter->debugfs_dir = NULL;
3732         } else {
3733                 adapter->debugfs_dir = ent;
3734                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3735                                           netdev, &ibmvnic_dump_ops);
3736                 if (!ent || IS_ERR(ent)) {
3737                         dev_info(&dev->dev,
3738                                  "debugfs create dump file failed\n");
3739                         adapter->debugfs_dump = NULL;
3740                 } else {
3741                         adapter->debugfs_dump = ent;
3742                 }
3743         }
3744         ibmvnic_send_crq_init(adapter);
3745
3746         init_completion(&adapter->init_done);
3747         if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3748                 return 0;
3749
3750         do {
3751                 if (adapter->renegotiate) {
3752                         adapter->renegotiate = false;
3753                         release_sub_crqs_no_irqs(adapter);
3754                         send_cap_queries(adapter);
3755
3756                         reinit_completion(&adapter->init_done);
3757                         if (!wait_for_completion_timeout(&adapter->init_done,
3758                                                          timeout))
3759                                 return 0;
3760                 }
3761         } while (adapter->renegotiate);
3762
3763         rc = init_sub_crq_irqs(adapter);
3764         if (rc) {
3765                 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3766                 goto free_debugfs;
3767         }
3768
3769         netdev->real_num_tx_queues = adapter->req_tx_queues;
3770
3771         rc = register_netdev(netdev);
3772         if (rc) {
3773                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3774                 goto free_sub_crqs;
3775         }
3776         dev_info(&dev->dev, "ibmvnic registered\n");
3777
3778         return 0;
3779
3780 free_sub_crqs:
3781         release_sub_crqs(adapter);
3782 free_debugfs:
3783         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3784                 debugfs_remove_recursive(adapter->debugfs_dir);
3785 free_crq:
3786         ibmvnic_release_crq_queue(adapter);
3787 free_netdev:
3788         free_netdev(netdev);
3789         return rc;
3790 }
3791
3792 static int ibmvnic_remove(struct vio_dev *dev)
3793 {
3794         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3795         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3796
3797         unregister_netdev(netdev);
3798
3799         release_sub_crqs(adapter);
3800
3801         ibmvnic_release_crq_queue(adapter);
3802
3803         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3804                 debugfs_remove_recursive(adapter->debugfs_dir);
3805
3806         if (adapter->ras_comps)
3807                 dma_free_coherent(&dev->dev,
3808                                   adapter->ras_comp_num *
3809                                   sizeof(struct ibmvnic_fw_component),
3810                                   adapter->ras_comps, adapter->ras_comps_tok);
3811
3812         kfree(adapter->ras_comp_int);
3813
3814         free_netdev(netdev);
3815         dev_set_drvdata(&dev->dev, NULL);
3816
3817         return 0;
3818 }
3819
3820 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3821 {
3822         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3823         struct ibmvnic_adapter *adapter;
3824         struct iommu_table *tbl;
3825         unsigned long ret = 0;
3826         int i;
3827
3828         tbl = get_iommu_table_base(&vdev->dev);
3829
3830         /* netdev inits at probe time along with the structures we need below*/
3831         if (!netdev)
3832                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3833
3834         adapter = netdev_priv(netdev);
3835
3836         ret += PAGE_SIZE; /* the crq message queue */
3837         ret += adapter->bounce_buffer_size;
3838         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3839
3840         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3841                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3842
3843         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3844              i++)
3845                 ret += adapter->rx_pool[i].size *
3846                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3847
3848         return ret;
3849 }
3850
3851 static int ibmvnic_resume(struct device *dev)
3852 {
3853         struct net_device *netdev = dev_get_drvdata(dev);
3854         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3855         int i;
3856
3857         /* kick the interrupt handlers just in case we lost an interrupt */
3858         for (i = 0; i < adapter->req_rx_queues; i++)
3859                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3860                                      adapter->rx_scrq[i]);
3861
3862         return 0;
3863 }
3864
3865 static struct vio_device_id ibmvnic_device_table[] = {
3866         {"network", "IBM,vnic"},
3867         {"", "" }
3868 };
3869 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3870
3871 static const struct dev_pm_ops ibmvnic_pm_ops = {
3872         .resume = ibmvnic_resume
3873 };
3874
3875 static struct vio_driver ibmvnic_driver = {
3876         .id_table       = ibmvnic_device_table,
3877         .probe          = ibmvnic_probe,
3878         .remove         = ibmvnic_remove,
3879         .get_desired_dma = ibmvnic_get_desired_dma,
3880         .name           = ibmvnic_driver_name,
3881         .pm             = &ibmvnic_pm_ops,
3882 };
3883
3884 /* module functions */
3885 static int __init ibmvnic_module_init(void)
3886 {
3887         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3888                 IBMVNIC_DRIVER_VERSION);
3889
3890         return vio_register_driver(&ibmvnic_driver);
3891 }
3892
3893 static void __exit ibmvnic_module_exit(void)
3894 {
3895         vio_unregister_driver(&ibmvnic_driver);
3896 }
3897
3898 module_init(ibmvnic_module_init);
3899 module_exit(ibmvnic_module_exit);