drivers/net/ethernet/ibm/ibmvnic.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /**************************************************************************/
   3 /*                                                                        */
   4 /*  IBM System i and System p Virtual NIC Device Driver                   */
   5 /*  Copyright (C) 2014 IBM Corp.                                          */
   6 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   7 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   8 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   9 /*                                                                        */
  10 /*                                                                        */
  11 /* This module contains the implementation of a virtual ethernet device   */
  12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  13 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  14 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  15 /*                                                                         */
  16 /* Messages are passed between the VNIC driver and the VNIC server using  */
  17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  18 /* issue and receive commands that initiate communication with the server */
  19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  20 /* are used by the driver to notify the server that a packet is           */
  21 /* ready for transmission or that a buffer has been added to receive a    */
  22 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  23 /* driver that a packet transmission has been completed or that a packet  */
  24 /* has been received and placed in a waiting buffer.                      */
  25 /*                                                                        */
  26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  27 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  28 /* or receive has been completed, the VNIC driver is required to use      */
  29 /* "long term mapping". This entails that large, continuous DMA mapped    */
  30 /* buffers are allocated on driver initialization and these buffers are   */
  31 /* then continuously reused to pass skbs to and from the VNIC server.     */
  32 /*                                                                        */
  33 /**************************************************************************/
  34
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/types.h>
  38 #include <linux/errno.h>
  39 #include <linux/completion.h>
  40 #include <linux/ioport.h>
  41 #include <linux/dma-mapping.h>
  42 #include <linux/kernel.h>
  43 #include <linux/netdevice.h>
  44 #include <linux/etherdevice.h>
  45 #include <linux/skbuff.h>
  46 #include <linux/init.h>
  47 #include <linux/delay.h>
  48 #include <linux/mm.h>
  49 #include <linux/ethtool.h>
  50 #include <linux/proc_fs.h>
  51 #include <linux/if_arp.h>
  52 #include <linux/in.h>
  53 #include <linux/ip.h>
  54 #include <linux/ipv6.h>
  55 #include <linux/irq.h>
  56 #include <linux/kthread.h>
  57 #include <linux/seq_file.h>
  58 #include <linux/interrupt.h>
  59 #include <net/net_namespace.h>
  60 #include <asm/hvcall.h>
  61 #include <linux/atomic.h>
  62 #include <asm/vio.h>
  63 #include <asm/iommu.h>
  64 #include <linux/uaccess.h>
  65 #include <asm/firmware.h>
  66 #include <linux/workqueue.h>
  67 #include <linux/if_vlan.h>
  68 #include <linux/utsname.h>
  69
  70 #include "ibmvnic.h"
  71
  72 static const char ibmvnic_driver_name[] = "ibmvnic";
  73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  74
  75 MODULE_AUTHOR("Santiago Leon");
  76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  77 MODULE_LICENSE("GPL");
  78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  79
  80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  81 static int ibmvnic_remove(struct vio_dev *);
  82 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
  83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  88                        union sub_crq *sub_crq);
  89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
  90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
  91 static int enable_scrq_irq(struct ibmvnic_adapter *,
  92                            struct ibmvnic_sub_crq_queue *);
  93 static int disable_scrq_irq(struct ibmvnic_adapter *,
  94                             struct ibmvnic_sub_crq_queue *);
  95 static int pending_scrq(struct ibmvnic_adapter *,
  96                         struct ibmvnic_sub_crq_queue *);
  97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
  98                                         struct ibmvnic_sub_crq_queue *);
  99 static int ibmvnic_poll(struct napi_struct *napi, int data);
 100 static void send_map_query(struct ibmvnic_adapter *adapter);
 101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 102 static int send_request_unmap(struct ibmvnic_adapter *, u8);
 103 static int send_login(struct ibmvnic_adapter *adapter);
 104 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 105 static int init_sub_crqs(struct ibmvnic_adapter *);
 106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 107 static int ibmvnic_init(struct ibmvnic_adapter *);
 108 static int ibmvnic_reset_init(struct ibmvnic_adapter *);
 109 static void release_crq_queue(struct ibmvnic_adapter *);
 110 static int __ibmvnic_set_mac(struct net_device *, u8 *);
 111 static int init_crq_queue(struct ibmvnic_adapter *adapter);
 112 static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
 113
 114 struct ibmvnic_stat {
 115         char name[ETH_GSTRING_LEN];
 116         int offset;
 117 };
 118
 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 120                              offsetof(struct ibmvnic_statistics, stat))
 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 122
 123 static const struct ibmvnic_stat ibmvnic_stats[] = {
 124         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 125         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 126         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 127         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 128         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 129         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 130         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 131         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 132         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 133         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 134         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 135         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 136         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 137         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 138         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 139         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 140         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 141         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 142         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 143         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 144         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 145         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 146 };
 147
 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 149                           unsigned long length, unsigned long *number,
 150                           unsigned long *irq)
 151 {
 152         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 153         long rc;
 154
 155         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 156         *number = retbuf[0];
 157         *irq = retbuf[1];
 158
 159         return rc;
 160 }
 161
 162 /**
 163  * ibmvnic_wait_for_completion - Check device state and wait for completion
 164  * @adapter: private device data
 165  * @comp_done: completion structure to wait for
 166  * @timeout: time to wait in milliseconds
 167  *
 168  * Wait for a completion signal or until the timeout limit is reached
 169  * while checking that the device is still active.
 170  */
 171 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
 172                                        struct completion *comp_done,
 173                                        unsigned long timeout)
 174 {
 175         struct net_device *netdev;
 176         unsigned long div_timeout;
 177         u8 retry;
 178
 179         netdev = adapter->netdev;
 180         retry = 5;
 181         div_timeout = msecs_to_jiffies(timeout / retry);
 182         while (true) {
 183                 if (!adapter->crq.active) {
 184                         netdev_err(netdev, "Device down!\n");
 185                         return -ENODEV;
 186                 }
 187                 if (!retry--)
 188                         break;
 189                 if (wait_for_completion_timeout(comp_done, div_timeout))
 190                         return 0;
 191         }
 192         netdev_err(netdev, "Operation timed out.\n");
 193         return -ETIMEDOUT;
 194 }
 195
 196 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 197                                 struct ibmvnic_long_term_buff *ltb, int size)
 198 {
 199         struct device *dev = &adapter->vdev->dev;
 200         int rc;
 201
 202         ltb->size = size;
 203         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 204                                        GFP_KERNEL);
 205
 206         if (!ltb->buff) {
 207                 dev_err(dev, "Couldn't alloc long term buffer\n");
 208                 return -ENOMEM;
 209         }
 210         ltb->map_id = adapter->map_id;
 211         adapter->map_id++;
 212
 213         mutex_lock(&adapter->fw_lock);
 214         adapter->fw_done_rc = 0;
 215         reinit_completion(&adapter->fw_done);
 216         rc = send_request_map(adapter, ltb->addr,
 217                               ltb->size, ltb->map_id);
 218         if (rc) {
 219                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 220                 mutex_unlock(&adapter->fw_lock);
 221                 return rc;
 222         }
 223
 224         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
 225         if (rc) {
 226                 dev_err(dev,
 227                         "Long term map request aborted or timed out,rc = %d\n",
 228                         rc);
 229                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 230                 mutex_unlock(&adapter->fw_lock);
 231                 return rc;
 232         }
 233
 234         if (adapter->fw_done_rc) {
 235                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 236                         adapter->fw_done_rc);
 237                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 238                 mutex_unlock(&adapter->fw_lock);
 239                 return -1;
 240         }
 241         mutex_unlock(&adapter->fw_lock);
 242         return 0;
 243 }
 244
 245 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 246                                 struct ibmvnic_long_term_buff *ltb)
 247 {
 248         struct device *dev = &adapter->vdev->dev;
 249
 250         if (!ltb->buff)
 251                 return;
 252
 253         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 254             adapter->reset_reason != VNIC_RESET_MOBILITY)
 255                 send_request_unmap(adapter, ltb->map_id);
 256         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 257 }
 258
 259 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 260                                 struct ibmvnic_long_term_buff *ltb)
 261 {
 262         struct device *dev = &adapter->vdev->dev;
 263         int rc;
 264
 265         memset(ltb->buff, 0, ltb->size);
 266
 267         mutex_lock(&adapter->fw_lock);
 268         adapter->fw_done_rc = 0;
 269
 270         reinit_completion(&adapter->fw_done);
 271         rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 272         if (rc) {
 273                 mutex_unlock(&adapter->fw_lock);
 274                 return rc;
 275         }
 276
 277         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
 278         if (rc) {
 279                 dev_info(dev,
 280                          "Reset failed, long term map request timed out or aborted\n");
 281                 mutex_unlock(&adapter->fw_lock);
 282                 return rc;
 283         }
 284
 285         if (adapter->fw_done_rc) {
 286                 dev_info(dev,
 287                          "Reset failed, attempting to free and reallocate buffer\n");
 288                 free_long_term_buff(adapter, ltb);
 289                 mutex_unlock(&adapter->fw_lock);
 290                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 291         }
 292         mutex_unlock(&adapter->fw_lock);
 293         return 0;
 294 }
 295
 296 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 297 {
 298         int i;
 299
 300         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 301              i++)
 302                 adapter->rx_pool[i].active = 0;
 303 }
 304
 305 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 306                               struct ibmvnic_rx_pool *pool)
 307 {
 308         int count = pool->size - atomic_read(&pool->available);
 309         struct device *dev = &adapter->vdev->dev;
 310         int buffers_added = 0;
 311         unsigned long lpar_rc;
 312         union sub_crq sub_crq;
 313         struct sk_buff *skb;
 314         unsigned int offset;
 315         dma_addr_t dma_addr;
 316         unsigned char *dst;
 317         u64 *handle_array;
 318         int shift = 0;
 319         int index;
 320         int i;
 321
 322         if (!pool->active)
 323                 return;
 324
 325         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 326                                       be32_to_cpu(adapter->login_rsp_buf->
 327                                       off_rxadd_subcrqs));
 328
 329         for (i = 0; i < count; ++i) {
 330                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 331                 if (!skb) {
 332                         dev_err(dev, "Couldn't replenish rx buff\n");
 333                         adapter->replenish_no_mem++;
 334                         break;
 335                 }
 336
 337                 index = pool->free_map[pool->next_free];
 338
 339                 if (pool->rx_buff[index].skb)
 340                         dev_err(dev, "Inconsistent free_map!\n");
 341
 342                 /* Copy the skb to the long term mapped DMA buffer */
 343                 offset = index * pool->buff_size;
 344                 dst = pool->long_term_buff.buff + offset;
 345                 memset(dst, 0, pool->buff_size);
 346                 dma_addr = pool->long_term_buff.addr + offset;
 347                 pool->rx_buff[index].data = dst;
 348
 349                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 350                 pool->rx_buff[index].dma = dma_addr;
 351                 pool->rx_buff[index].skb = skb;
 352                 pool->rx_buff[index].pool_index = pool->index;
 353                 pool->rx_buff[index].size = pool->buff_size;
 354
 355                 memset(&sub_crq, 0, sizeof(sub_crq));
 356                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 357                 sub_crq.rx_add.correlator =
 358                     cpu_to_be64((u64)&pool->rx_buff[index]);
 359                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 360                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 361
 362                 /* The length field of the sCRQ is defined to be 24 bits so the
 363                  * buffer size needs to be left shifted by a byte before it is
 364                  * converted to big endian to prevent the last byte from being
 365                  * truncated.
 366                  */
 367 #ifdef __LITTLE_ENDIAN__
 368                 shift = 8;
 369 #endif
 370                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 371
 372                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 373                                       &sub_crq);
 374                 if (lpar_rc != H_SUCCESS)
 375                         goto failure;
 376
 377                 buffers_added++;
 378                 adapter->replenish_add_buff_success++;
 379                 pool->next_free = (pool->next_free + 1) % pool->size;
 380         }
 381         atomic_add(buffers_added, &pool->available);
 382         return;
 383
 384 failure:
 385         if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
 386                 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
 387         pool->free_map[pool->next_free] = index;
 388         pool->rx_buff[index].skb = NULL;
 389
 390         dev_kfree_skb_any(skb);
 391         adapter->replenish_add_buff_failure++;
 392         atomic_add(buffers_added, &pool->available);
 393
 394         if (lpar_rc == H_CLOSED || adapter->failover_pending) {
 395                 /* Disable buffer pool replenishment and report carrier off if
 396                  * queue is closed or pending failover.
 397                  * Firmware guarantees that a signal will be sent to the
 398                  * driver, triggering a reset.
 399                  */
 400                 deactivate_rx_pools(adapter);
 401                 netif_carrier_off(adapter->netdev);
 402         }
 403 }
 404
 405 static void replenish_pools(struct ibmvnic_adapter *adapter)
 406 {
 407         int i;
 408
 409         adapter->replenish_task_cycles++;
 410         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 411              i++) {
 412                 if (adapter->rx_pool[i].active)
 413                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 414         }
 415 }
 416
 417 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 418 {
 419         kfree(adapter->tx_stats_buffers);
 420         kfree(adapter->rx_stats_buffers);
 421         adapter->tx_stats_buffers = NULL;
 422         adapter->rx_stats_buffers = NULL;
 423 }
 424
 425 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 426 {
 427         adapter->tx_stats_buffers =
 428                                 kcalloc(IBMVNIC_MAX_QUEUES,
 429                                         sizeof(struct ibmvnic_tx_queue_stats),
 430                                         GFP_KERNEL);
 431         if (!adapter->tx_stats_buffers)
 432                 return -ENOMEM;
 433
 434         adapter->rx_stats_buffers =
 435                                 kcalloc(IBMVNIC_MAX_QUEUES,
 436                                         sizeof(struct ibmvnic_rx_queue_stats),
 437                                         GFP_KERNEL);
 438         if (!adapter->rx_stats_buffers)
 439                 return -ENOMEM;
 440
 441         return 0;
 442 }
 443
 444 static void release_stats_token(struct ibmvnic_adapter *adapter)
 445 {
 446         struct device *dev = &adapter->vdev->dev;
 447
 448         if (!adapter->stats_token)
 449                 return;
 450
 451         dma_unmap_single(dev, adapter->stats_token,
 452                          sizeof(struct ibmvnic_statistics),
 453                          DMA_FROM_DEVICE);
 454         adapter->stats_token = 0;
 455 }
 456
 457 static int init_stats_token(struct ibmvnic_adapter *adapter)
 458 {
 459         struct device *dev = &adapter->vdev->dev;
 460         dma_addr_t stok;
 461
 462         stok = dma_map_single(dev, &adapter->stats,
 463                               sizeof(struct ibmvnic_statistics),
 464                               DMA_FROM_DEVICE);
 465         if (dma_mapping_error(dev, stok)) {
 466                 dev_err(dev, "Couldn't map stats buffer\n");
 467                 return -1;
 468         }
 469
 470         adapter->stats_token = stok;
 471         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 472         return 0;
 473 }
 474
 475 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 476 {
 477         struct ibmvnic_rx_pool *rx_pool;
 478         int rx_scrqs;
 479         int i, j, rc;
 480         u64 *size_array;
 481
 482         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 483                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 484
 485         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 486         for (i = 0; i < rx_scrqs; i++) {
 487                 rx_pool = &adapter->rx_pool[i];
 488
 489                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 490
 491                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 492                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 493                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 494                         rc = alloc_long_term_buff(adapter,
 495                                                   &rx_pool->long_term_buff,
 496                                                   rx_pool->size *
 497                                                   rx_pool->buff_size);
 498                 } else {
 499                         rc = reset_long_term_buff(adapter,
 500                                                   &rx_pool->long_term_buff);
 501                 }
 502
 503                 if (rc)
 504                         return rc;
 505
 506                 for (j = 0; j < rx_pool->size; j++)
 507                         rx_pool->free_map[j] = j;
 508
 509                 memset(rx_pool->rx_buff, 0,
 510                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 511
 512                 atomic_set(&rx_pool->available, 0);
 513                 rx_pool->next_alloc = 0;
 514                 rx_pool->next_free = 0;
 515                 rx_pool->active = 1;
 516         }
 517
 518         return 0;
 519 }
 520
 521 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 522 {
 523         struct ibmvnic_rx_pool *rx_pool;
 524         int i, j;
 525
 526         if (!adapter->rx_pool)
 527                 return;
 528
 529         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 530                 rx_pool = &adapter->rx_pool[i];
 531
 532                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 533
 534                 kfree(rx_pool->free_map);
 535                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 536
 537                 if (!rx_pool->rx_buff)
 538                         continue;
 539
 540                 for (j = 0; j < rx_pool->size; j++) {
 541                         if (rx_pool->rx_buff[j].skb) {
 542                                 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
 543                                 rx_pool->rx_buff[j].skb = NULL;
 544                         }
 545                 }
 546
 547                 kfree(rx_pool->rx_buff);
 548         }
 549
 550         kfree(adapter->rx_pool);
 551         adapter->rx_pool = NULL;
 552         adapter->num_active_rx_pools = 0;
 553 }
 554
 555 static int init_rx_pools(struct net_device *netdev)
 556 {
 557         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 558         struct device *dev = &adapter->vdev->dev;
 559         struct ibmvnic_rx_pool *rx_pool;
 560         int rxadd_subcrqs;
 561         u64 *size_array;
 562         int i, j;
 563
 564         rxadd_subcrqs =
 565                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 566         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 567                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 568
 569         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 570                                    sizeof(struct ibmvnic_rx_pool),
 571                                    GFP_KERNEL);
 572         if (!adapter->rx_pool) {
 573                 dev_err(dev, "Failed to allocate rx pools\n");
 574                 return -1;
 575         }
 576
 577         adapter->num_active_rx_pools = rxadd_subcrqs;
 578
 579         for (i = 0; i < rxadd_subcrqs; i++) {
 580                 rx_pool = &adapter->rx_pool[i];
 581
 582                 netdev_dbg(adapter->netdev,
 583                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 584                            i, adapter->req_rx_add_entries_per_subcrq,
 585                            be64_to_cpu(size_array[i]));
 586
 587                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 588                 rx_pool->index = i;
 589                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 590                 rx_pool->active = 1;
 591
 592                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 593                                             GFP_KERNEL);
 594                 if (!rx_pool->free_map) {
 595                         release_rx_pools(adapter);
 596                         return -1;
 597                 }
 598
 599                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 600                                            sizeof(struct ibmvnic_rx_buff),
 601                                            GFP_KERNEL);
 602                 if (!rx_pool->rx_buff) {
 603                         dev_err(dev, "Couldn't alloc rx buffers\n");
 604                         release_rx_pools(adapter);
 605                         return -1;
 606                 }
 607
 608                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 609                                          rx_pool->size * rx_pool->buff_size)) {
 610                         release_rx_pools(adapter);
 611                         return -1;
 612                 }
 613
 614                 for (j = 0; j < rx_pool->size; ++j)
 615                         rx_pool->free_map[j] = j;
 616
 617                 atomic_set(&rx_pool->available, 0);
 618                 rx_pool->next_alloc = 0;
 619                 rx_pool->next_free = 0;
 620         }
 621
 622         return 0;
 623 }
 624
 625 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
 626                              struct ibmvnic_tx_pool *tx_pool)
 627 {
 628         int rc, i;
 629
 630         rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 631         if (rc)
 632                 return rc;
 633
 634         memset(tx_pool->tx_buff, 0,
 635                tx_pool->num_buffers *
 636                sizeof(struct ibmvnic_tx_buff));
 637
 638         for (i = 0; i < tx_pool->num_buffers; i++)
 639                 tx_pool->free_map[i] = i;
 640
 641         tx_pool->consumer_index = 0;
 642         tx_pool->producer_index = 0;
 643
 644         return 0;
 645 }
 646
 647 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 648 {
 649         int tx_scrqs;
 650         int i, rc;
 651
 652         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 653         for (i = 0; i < tx_scrqs; i++) {
 654                 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
 655                 if (rc)
 656                         return rc;
 657                 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
 658                 if (rc)
 659                         return rc;
 660         }
 661
 662         return 0;
 663 }
 664
 665 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 666 {
 667         if (!adapter->vpd)
 668                 return;
 669
 670         kfree(adapter->vpd->buff);
 671         kfree(adapter->vpd);
 672
 673         adapter->vpd = NULL;
 674 }
 675
 676 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
 677                                 struct ibmvnic_tx_pool *tx_pool)
 678 {
 679         kfree(tx_pool->tx_buff);
 680         kfree(tx_pool->free_map);
 681         free_long_term_buff(adapter, &tx_pool->long_term_buff);
 682 }
 683
 684 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 685 {
 686         int i;
 687
 688         if (!adapter->tx_pool)
 689                 return;
 690
 691         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 692                 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
 693                 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
 694         }
 695
 696         kfree(adapter->tx_pool);
 697         adapter->tx_pool = NULL;
 698         kfree(adapter->tso_pool);
 699         adapter->tso_pool = NULL;
 700         adapter->num_active_tx_pools = 0;
 701 }
 702
 703 static int init_one_tx_pool(struct net_device *netdev,
 704                             struct ibmvnic_tx_pool *tx_pool,
 705                             int num_entries, int buf_size)
 706 {
 707         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 708         int i;
 709
 710         tx_pool->tx_buff = kcalloc(num_entries,
 711                                    sizeof(struct ibmvnic_tx_buff),
 712                                    GFP_KERNEL);
 713         if (!tx_pool->tx_buff)
 714                 return -1;
 715
 716         if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 717                                  num_entries * buf_size))
 718                 return -1;
 719
 720         tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
 721         if (!tx_pool->free_map)
 722                 return -1;
 723
 724         for (i = 0; i < num_entries; i++)
 725                 tx_pool->free_map[i] = i;
 726
 727         tx_pool->consumer_index = 0;
 728         tx_pool->producer_index = 0;
 729         tx_pool->num_buffers = num_entries;
 730         tx_pool->buf_size = buf_size;
 731
 732         return 0;
 733 }
 734
 735 static int init_tx_pools(struct net_device *netdev)
 736 {
 737         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 738         int tx_subcrqs;
 739         int i, rc;
 740
 741         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 742         adapter->tx_pool = kcalloc(tx_subcrqs,
 743                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 744         if (!adapter->tx_pool)
 745                 return -1;
 746
 747         adapter->tso_pool = kcalloc(tx_subcrqs,
 748                                     sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 749         if (!adapter->tso_pool)
 750                 return -1;
 751
 752         adapter->num_active_tx_pools = tx_subcrqs;
 753
 754         for (i = 0; i < tx_subcrqs; i++) {
 755                 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
 756                                       adapter->req_tx_entries_per_subcrq,
 757                                       adapter->req_mtu + VLAN_HLEN);
 758                 if (rc) {
 759                         release_tx_pools(adapter);
 760                         return rc;
 761                 }
 762
 763                 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
 764                                       IBMVNIC_TSO_BUFS,
 765                                       IBMVNIC_TSO_BUF_SZ);
 766                 if (rc) {
 767                         release_tx_pools(adapter);
 768                         return rc;
 769                 }
 770         }
 771
 772         return 0;
 773 }
 774
 775 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 776 {
 777         int i;
 778
 779         if (adapter->napi_enabled)
 780                 return;
 781
 782         for (i = 0; i < adapter->req_rx_queues; i++)
 783                 napi_enable(&adapter->napi[i]);
 784
 785         adapter->napi_enabled = true;
 786 }
 787
 788 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 789 {
 790         int i;
 791
 792         if (!adapter->napi_enabled)
 793                 return;
 794
 795         for (i = 0; i < adapter->req_rx_queues; i++) {
 796                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 797                 napi_disable(&adapter->napi[i]);
 798         }
 799
 800         adapter->napi_enabled = false;
 801 }
 802
 803 static int init_napi(struct ibmvnic_adapter *adapter)
 804 {
 805         int i;
 806
 807         adapter->napi = kcalloc(adapter->req_rx_queues,
 808                                 sizeof(struct napi_struct), GFP_KERNEL);
 809         if (!adapter->napi)
 810                 return -ENOMEM;
 811
 812         for (i = 0; i < adapter->req_rx_queues; i++) {
 813                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 814                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 815                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 816         }
 817
 818         adapter->num_active_rx_napi = adapter->req_rx_queues;
 819         return 0;
 820 }
 821
 822 static void release_napi(struct ibmvnic_adapter *adapter)
 823 {
 824         int i;
 825
 826         if (!adapter->napi)
 827                 return;
 828
 829         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 830                 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
 831                 netif_napi_del(&adapter->napi[i]);
 832         }
 833
 834         kfree(adapter->napi);
 835         adapter->napi = NULL;
 836         adapter->num_active_rx_napi = 0;
 837         adapter->napi_enabled = false;
 838 }
 839
 840 static int ibmvnic_login(struct net_device *netdev)
 841 {
 842         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 843         unsigned long timeout = msecs_to_jiffies(30000);
 844         int retry_count = 0;
 845         int retries = 10;
 846         bool retry;
 847         int rc;
 848
 849         do {
 850                 retry = false;
 851                 if (retry_count > retries) {
 852                         netdev_warn(netdev, "Login attempts exceeded\n");
 853                         return -1;
 854                 }
 855
 856                 adapter->init_done_rc = 0;
 857                 reinit_completion(&adapter->init_done);
 858                 rc = send_login(adapter);
 859                 if (rc) {
 860                         netdev_warn(netdev, "Unable to login\n");
 861                         return rc;
 862                 }
 863
 864                 if (!wait_for_completion_timeout(&adapter->init_done,
 865                                                  timeout)) {
 866                         netdev_warn(netdev, "Login timed out, retrying...\n");
 867                         retry = true;
 868                         adapter->init_done_rc = 0;
 869                         retry_count++;
 870                         continue;
 871                 }
 872
 873                 if (adapter->init_done_rc == ABORTED) {
 874                         netdev_warn(netdev, "Login aborted, retrying...\n");
 875                         retry = true;
 876                         adapter->init_done_rc = 0;
 877                         retry_count++;
 878                         /* FW or device may be busy, so
 879                          * wait a bit before retrying login
 880                          */
 881                         msleep(500);
 882                 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
 883                         retry_count++;
 884                         release_sub_crqs(adapter, 1);
 885
 886                         retry = true;
 887                         netdev_dbg(netdev,
 888                                    "Received partial success, retrying...\n");
 889                         adapter->init_done_rc = 0;
 890                         reinit_completion(&adapter->init_done);
 891                         send_cap_queries(adapter);
 892                         if (!wait_for_completion_timeout(&adapter->init_done,
 893                                                          timeout)) {
 894                                 netdev_warn(netdev,
 895                                             "Capabilities query timed out\n");
 896                                 return -1;
 897                         }
 898
 899                         rc = init_sub_crqs(adapter);
 900                         if (rc) {
 901                                 netdev_warn(netdev,
 902                                             "SCRQ initialization failed\n");
 903                                 return -1;
 904                         }
 905
 906                         rc = init_sub_crq_irqs(adapter);
 907                         if (rc) {
 908                                 netdev_warn(netdev,
 909                                             "SCRQ irq initialization failed\n");
 910                                 return -1;
 911                         }
 912                 } else if (adapter->init_done_rc) {
 913                         netdev_warn(netdev, "Adapter login failed\n");
 914                         return -1;
 915                 }
 916         } while (retry);
 917
 918         __ibmvnic_set_mac(netdev, adapter->mac_addr);
 919
 920         return 0;
 921 }
 922
 923 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 924 {
 925         kfree(adapter->login_buf);
 926         adapter->login_buf = NULL;
 927 }
 928
 929 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 930 {
 931         kfree(adapter->login_rsp_buf);
 932         adapter->login_rsp_buf = NULL;
 933 }
 934
 935 static void release_resources(struct ibmvnic_adapter *adapter)
 936 {
 937         release_vpd_data(adapter);
 938
 939         release_tx_pools(adapter);
 940         release_rx_pools(adapter);
 941
 942         release_napi(adapter);
 943         release_login_rsp_buffer(adapter);
 944 }
 945
 946 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 947 {
 948         struct net_device *netdev = adapter->netdev;
 949         unsigned long timeout = msecs_to_jiffies(30000);
 950         union ibmvnic_crq crq;
 951         bool resend;
 952         int rc;
 953
 954         netdev_dbg(netdev, "setting link state %d\n", link_state);
 955
 956         memset(&crq, 0, sizeof(crq));
 957         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 958         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 959         crq.logical_link_state.link_state = link_state;
 960
 961         do {
 962                 resend = false;
 963
 964                 reinit_completion(&adapter->init_done);
 965                 rc = ibmvnic_send_crq(adapter, &crq);
 966                 if (rc) {
 967                         netdev_err(netdev, "Failed to set link state\n");
 968                         return rc;
 969                 }
 970
 971                 if (!wait_for_completion_timeout(&adapter->init_done,
 972                                                  timeout)) {
 973                         netdev_err(netdev, "timeout setting link state\n");
 974                         return -1;
 975                 }
 976
 977                 if (adapter->init_done_rc == 1) {
 978                         /* Partuial success, delay and re-send */
 979                         mdelay(1000);
 980                         resend = true;
 981                 } else if (adapter->init_done_rc) {
 982                         netdev_warn(netdev, "Unable to set link state, rc=%d\n",
 983                                     adapter->init_done_rc);
 984                         return adapter->init_done_rc;
 985                 }
 986         } while (resend);
 987
 988         return 0;
 989 }
 990
 991 static int set_real_num_queues(struct net_device *netdev)
 992 {
 993         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 994         int rc;
 995
 996         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 997                    adapter->req_tx_queues, adapter->req_rx_queues);
 998
 999         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
1000         if (rc) {
1001                 netdev_err(netdev, "failed to set the number of tx queues\n");
1002                 return rc;
1003         }
1004
1005         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
1006         if (rc)
1007                 netdev_err(netdev, "failed to set the number of rx queues\n");
1008
1009         return rc;
1010 }
1011
1012 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1013 {
1014         struct device *dev = &adapter->vdev->dev;
1015         union ibmvnic_crq crq;
1016         int len = 0;
1017         int rc;
1018
1019         if (adapter->vpd->buff)
1020                 len = adapter->vpd->len;
1021
1022         mutex_lock(&adapter->fw_lock);
1023         adapter->fw_done_rc = 0;
1024         reinit_completion(&adapter->fw_done);
1025
1026         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1027         crq.get_vpd_size.cmd = GET_VPD_SIZE;
1028         rc = ibmvnic_send_crq(adapter, &crq);
1029         if (rc) {
1030                 mutex_unlock(&adapter->fw_lock);
1031                 return rc;
1032         }
1033
1034         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1035         if (rc) {
1036                 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1037                 mutex_unlock(&adapter->fw_lock);
1038                 return rc;
1039         }
1040         mutex_unlock(&adapter->fw_lock);
1041
1042         if (!adapter->vpd->len)
1043                 return -ENODATA;
1044
1045         if (!adapter->vpd->buff)
1046                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1047         else if (adapter->vpd->len != len)
1048                 adapter->vpd->buff =
1049                         krealloc(adapter->vpd->buff,
1050                                  adapter->vpd->len, GFP_KERNEL);
1051
1052         if (!adapter->vpd->buff) {
1053                 dev_err(dev, "Could allocate VPD buffer\n");
1054                 return -ENOMEM;
1055         }
1056
1057         adapter->vpd->dma_addr =
1058                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1059                                DMA_FROM_DEVICE);
1060         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1061                 dev_err(dev, "Could not map VPD buffer\n");
1062                 kfree(adapter->vpd->buff);
1063                 adapter->vpd->buff = NULL;
1064                 return -ENOMEM;
1065         }
1066
1067         mutex_lock(&adapter->fw_lock);
1068         adapter->fw_done_rc = 0;
1069         reinit_completion(&adapter->fw_done);
1070
1071         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1072         crq.get_vpd.cmd = GET_VPD;
1073         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1074         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1075         rc = ibmvnic_send_crq(adapter, &crq);
1076         if (rc) {
1077                 kfree(adapter->vpd->buff);
1078                 adapter->vpd->buff = NULL;
1079                 mutex_unlock(&adapter->fw_lock);
1080                 return rc;
1081         }
1082
1083         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1084         if (rc) {
1085                 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1086                 kfree(adapter->vpd->buff);
1087                 adapter->vpd->buff = NULL;
1088                 mutex_unlock(&adapter->fw_lock);
1089                 return rc;
1090         }
1091
1092         mutex_unlock(&adapter->fw_lock);
1093         return 0;
1094 }
1095
1096 static int init_resources(struct ibmvnic_adapter *adapter)
1097 {
1098         struct net_device *netdev = adapter->netdev;
1099         int rc;
1100
1101         rc = set_real_num_queues(netdev);
1102         if (rc)
1103                 return rc;
1104
1105         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1106         if (!adapter->vpd)
1107                 return -ENOMEM;
1108
1109         /* Vital Product Data (VPD) */
1110         rc = ibmvnic_get_vpd(adapter);
1111         if (rc) {
1112                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1113                 return rc;
1114         }
1115
1116         adapter->map_id = 1;
1117
1118         rc = init_napi(adapter);
1119         if (rc)
1120                 return rc;
1121
1122         send_map_query(adapter);
1123
1124         rc = init_rx_pools(netdev);
1125         if (rc)
1126                 return rc;
1127
1128         rc = init_tx_pools(netdev);
1129         return rc;
1130 }
1131
1132 static int __ibmvnic_open(struct net_device *netdev)
1133 {
1134         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1135         enum vnic_state prev_state = adapter->state;
1136         int i, rc;
1137
1138         adapter->state = VNIC_OPENING;
1139         replenish_pools(adapter);
1140         ibmvnic_napi_enable(adapter);
1141
1142         /* We're ready to receive frames, enable the sub-crq interrupts and
1143          * set the logical link state to up
1144          */
1145         for (i = 0; i < adapter->req_rx_queues; i++) {
1146                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1147                 if (prev_state == VNIC_CLOSED)
1148                         enable_irq(adapter->rx_scrq[i]->irq);
1149                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1150         }
1151
1152         for (i = 0; i < adapter->req_tx_queues; i++) {
1153                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1154                 if (prev_state == VNIC_CLOSED)
1155                         enable_irq(adapter->tx_scrq[i]->irq);
1156                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1157         }
1158
1159         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1160         if (rc) {
1161                 for (i = 0; i < adapter->req_rx_queues; i++)
1162                         napi_disable(&adapter->napi[i]);
1163                 release_resources(adapter);
1164                 return rc;
1165         }
1166
1167         netif_tx_start_all_queues(netdev);
1168
1169         if (prev_state == VNIC_CLOSED) {
1170                 for (i = 0; i < adapter->req_rx_queues; i++)
1171                         napi_schedule(&adapter->napi[i]);
1172         }
1173
1174         adapter->state = VNIC_OPEN;
1175         return rc;
1176 }
1177
1178 static int ibmvnic_open(struct net_device *netdev)
1179 {
1180         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1181         int rc;
1182
1183         /* If device failover is pending, just set device state and return.
1184          * Device operation will be handled by reset routine.
1185          */
1186         if (adapter->failover_pending) {
1187                 adapter->state = VNIC_OPEN;
1188                 return 0;
1189         }
1190
1191         if (adapter->state != VNIC_CLOSED) {
1192                 rc = ibmvnic_login(netdev);
1193                 if (rc)
1194                         return rc;
1195
1196                 rc = init_resources(adapter);
1197                 if (rc) {
1198                         netdev_err(netdev, "failed to initialize resources\n");
1199                         release_resources(adapter);
1200                         return rc;
1201                 }
1202         }
1203
1204         rc = __ibmvnic_open(netdev);
1205
1206         return rc;
1207 }
1208
1209 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1210 {
1211         struct ibmvnic_rx_pool *rx_pool;
1212         struct ibmvnic_rx_buff *rx_buff;
1213         u64 rx_entries;
1214         int rx_scrqs;
1215         int i, j;
1216
1217         if (!adapter->rx_pool)
1218                 return;
1219
1220         rx_scrqs = adapter->num_active_rx_pools;
1221         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1222
1223         /* Free any remaining skbs in the rx buffer pools */
1224         for (i = 0; i < rx_scrqs; i++) {
1225                 rx_pool = &adapter->rx_pool[i];
1226                 if (!rx_pool || !rx_pool->rx_buff)
1227                         continue;
1228
1229                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1230                 for (j = 0; j < rx_entries; j++) {
1231                         rx_buff = &rx_pool->rx_buff[j];
1232                         if (rx_buff && rx_buff->skb) {
1233                                 dev_kfree_skb_any(rx_buff->skb);
1234                                 rx_buff->skb = NULL;
1235                         }
1236                 }
1237         }
1238 }
1239
1240 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1241                               struct ibmvnic_tx_pool *tx_pool)
1242 {
1243         struct ibmvnic_tx_buff *tx_buff;
1244         u64 tx_entries;
1245         int i;
1246
1247         if (!tx_pool || !tx_pool->tx_buff)
1248                 return;
1249
1250         tx_entries = tx_pool->num_buffers;
1251
1252         for (i = 0; i < tx_entries; i++) {
1253                 tx_buff = &tx_pool->tx_buff[i];
1254                 if (tx_buff && tx_buff->skb) {
1255                         dev_kfree_skb_any(tx_buff->skb);
1256                         tx_buff->skb = NULL;
1257                 }
1258         }
1259 }
1260
1261 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1262 {
1263         int tx_scrqs;
1264         int i;
1265
1266         if (!adapter->tx_pool || !adapter->tso_pool)
1267                 return;
1268
1269         tx_scrqs = adapter->num_active_tx_pools;
1270
1271         /* Free any remaining skbs in the tx buffer pools */
1272         for (i = 0; i < tx_scrqs; i++) {
1273                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1274                 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1275                 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1276         }
1277 }
1278
1279 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1280 {
1281         struct net_device *netdev = adapter->netdev;
1282         int i;
1283
1284         if (adapter->tx_scrq) {
1285                 for (i = 0; i < adapter->req_tx_queues; i++)
1286                         if (adapter->tx_scrq[i]->irq) {
1287                                 netdev_dbg(netdev,
1288                                            "Disabling tx_scrq[%d] irq\n", i);
1289                                 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1290                                 disable_irq(adapter->tx_scrq[i]->irq);
1291                         }
1292         }
1293
1294         if (adapter->rx_scrq) {
1295                 for (i = 0; i < adapter->req_rx_queues; i++) {
1296                         if (adapter->rx_scrq[i]->irq) {
1297                                 netdev_dbg(netdev,
1298                                            "Disabling rx_scrq[%d] irq\n", i);
1299                                 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1300                                 disable_irq(adapter->rx_scrq[i]->irq);
1301                         }
1302                 }
1303         }
1304 }
1305
1306 static void ibmvnic_cleanup(struct net_device *netdev)
1307 {
1308         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1309
1310         /* ensure that transmissions are stopped if called by do_reset */
1311         if (test_bit(0, &adapter->resetting))
1312                 netif_tx_disable(netdev);
1313         else
1314                 netif_tx_stop_all_queues(netdev);
1315
1316         ibmvnic_napi_disable(adapter);
1317         ibmvnic_disable_irqs(adapter);
1318
1319         clean_rx_pools(adapter);
1320         clean_tx_pools(adapter);
1321 }
1322
1323 static int __ibmvnic_close(struct net_device *netdev)
1324 {
1325         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1326         int rc = 0;
1327
1328         adapter->state = VNIC_CLOSING;
1329         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1330         if (rc)
1331                 return rc;
1332         adapter->state = VNIC_CLOSED;
1333         return 0;
1334 }
1335
1336 static int ibmvnic_close(struct net_device *netdev)
1337 {
1338         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1339         int rc;
1340
1341         /* If device failover is pending, just set device state and return.
1342          * Device operation will be handled by reset routine.
1343          */
1344         if (adapter->failover_pending) {
1345                 adapter->state = VNIC_CLOSED;
1346                 return 0;
1347         }
1348
1349         rc = __ibmvnic_close(netdev);
1350         ibmvnic_cleanup(netdev);
1351
1352         return rc;
1353 }
1354
1355 /**
1356  * build_hdr_data - creates L2/L3/L4 header data buffer
1357  * @hdr_field - bitfield determining needed headers
1358  * @skb - socket buffer
1359  * @hdr_len - array of header lengths
1360  * @tot_len - total length of data
1361  *
1362  * Reads hdr_field to determine which headers are needed by firmware.
1363  * Builds a buffer containing these headers.  Saves individual header
1364  * lengths and total buffer length to be used to build descriptors.
1365  */
1366 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1367                           int *hdr_len, u8 *hdr_data)
1368 {
1369         int len = 0;
1370         u8 *hdr;
1371
1372         if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1373                 hdr_len[0] = sizeof(struct vlan_ethhdr);
1374         else
1375                 hdr_len[0] = sizeof(struct ethhdr);
1376
1377         if (skb->protocol == htons(ETH_P_IP)) {
1378                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1379                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1380                         hdr_len[2] = tcp_hdrlen(skb);
1381                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1382                         hdr_len[2] = sizeof(struct udphdr);
1383         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1384                 hdr_len[1] = sizeof(struct ipv6hdr);
1385                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1386                         hdr_len[2] = tcp_hdrlen(skb);
1387                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1388                         hdr_len[2] = sizeof(struct udphdr);
1389         } else if (skb->protocol == htons(ETH_P_ARP)) {
1390                 hdr_len[1] = arp_hdr_len(skb->dev);
1391                 hdr_len[2] = 0;
1392         }
1393
1394         memset(hdr_data, 0, 120);
1395         if ((hdr_field >> 6) & 1) {
1396                 hdr = skb_mac_header(skb);
1397                 memcpy(hdr_data, hdr, hdr_len[0]);
1398                 len += hdr_len[0];
1399         }
1400
1401         if ((hdr_field >> 5) & 1) {
1402                 hdr = skb_network_header(skb);
1403                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1404                 len += hdr_len[1];
1405         }
1406
1407         if ((hdr_field >> 4) & 1) {
1408                 hdr = skb_transport_header(skb);
1409                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1410                 len += hdr_len[2];
1411         }
1412         return len;
1413 }
1414
1415 /**
1416  * create_hdr_descs - create header and header extension descriptors
1417  * @hdr_field - bitfield determining needed headers
1418  * @data - buffer containing header data
1419  * @len - length of data buffer
1420  * @hdr_len - array of individual header lengths
1421  * @scrq_arr - descriptor array
1422  *
1423  * Creates header and, if needed, header extension descriptors and
1424  * places them in a descriptor array, scrq_arr
1425  */
1426
1427 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1428                             union sub_crq *scrq_arr)
1429 {
1430         union sub_crq hdr_desc;
1431         int tmp_len = len;
1432         int num_descs = 0;
1433         u8 *data, *cur;
1434         int tmp;
1435
1436         while (tmp_len > 0) {
1437                 cur = hdr_data + len - tmp_len;
1438
1439                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1440                 if (cur != hdr_data) {
1441                         data = hdr_desc.hdr_ext.data;
1442                         tmp = tmp_len > 29 ? 29 : tmp_len;
1443                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1444                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1445                         hdr_desc.hdr_ext.len = tmp;
1446                 } else {
1447                         data = hdr_desc.hdr.data;
1448                         tmp = tmp_len > 24 ? 24 : tmp_len;
1449                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1450                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1451                         hdr_desc.hdr.len = tmp;
1452                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1453                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1454                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1455                         hdr_desc.hdr.flag = hdr_field << 1;
1456                 }
1457                 memcpy(data, cur, tmp);
1458                 tmp_len -= tmp;
1459                 *scrq_arr = hdr_desc;
1460                 scrq_arr++;
1461                 num_descs++;
1462         }
1463
1464         return num_descs;
1465 }
1466
1467 /**
1468  * build_hdr_descs_arr - build a header descriptor array
1469  * @skb - socket buffer
1470  * @num_entries - number of descriptors to be sent
1471  * @subcrq - first TX descriptor
1472  * @hdr_field - bit field determining which headers will be sent
1473  *
1474  * This function will build a TX descriptor array with applicable
1475  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1476  */
1477
1478 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1479                                 int *num_entries, u8 hdr_field)
1480 {
1481         int hdr_len[3] = {0, 0, 0};
1482         int tot_len;
1483         u8 *hdr_data = txbuff->hdr_data;
1484
1485         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1486                                  txbuff->hdr_data);
1487         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1488                          txbuff->indir_arr + 1);
1489 }
1490
1491 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1492                                     struct net_device *netdev)
1493 {
1494         /* For some backing devices, mishandling of small packets
1495          * can result in a loss of connection or TX stall. Device
1496          * architects recommend that no packet should be smaller
1497          * than the minimum MTU value provided to the driver, so
1498          * pad any packets to that length
1499          */
1500         if (skb->len < netdev->min_mtu)
1501                 return skb_put_padto(skb, netdev->min_mtu);
1502
1503         return 0;
1504 }
1505
1506 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1507 {
1508         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1509         int queue_num = skb_get_queue_mapping(skb);
1510         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1511         struct device *dev = &adapter->vdev->dev;
1512         struct ibmvnic_tx_buff *tx_buff = NULL;
1513         struct ibmvnic_sub_crq_queue *tx_scrq;
1514         struct ibmvnic_tx_pool *tx_pool;
1515         unsigned int tx_send_failed = 0;
1516         unsigned int tx_map_failed = 0;
1517         unsigned int tx_dropped = 0;
1518         unsigned int tx_packets = 0;
1519         unsigned int tx_bytes = 0;
1520         dma_addr_t data_dma_addr;
1521         struct netdev_queue *txq;
1522         unsigned long lpar_rc;
1523         union sub_crq tx_crq;
1524         unsigned int offset;
1525         int num_entries = 1;
1526         unsigned char *dst;
1527         u64 *handle_array;
1528         int index = 0;
1529         u8 proto = 0;
1530         netdev_tx_t ret = NETDEV_TX_OK;
1531
1532         if (test_bit(0, &adapter->resetting)) {
1533                 if (!netif_subqueue_stopped(netdev, skb))
1534                         netif_stop_subqueue(netdev, queue_num);
1535                 dev_kfree_skb_any(skb);
1536
1537                 tx_send_failed++;
1538                 tx_dropped++;
1539                 ret = NETDEV_TX_OK;
1540                 goto out;
1541         }
1542
1543         if (ibmvnic_xmit_workarounds(skb, netdev)) {
1544                 tx_dropped++;
1545                 tx_send_failed++;
1546                 ret = NETDEV_TX_OK;
1547                 goto out;
1548         }
1549         if (skb_is_gso(skb))
1550                 tx_pool = &adapter->tso_pool[queue_num];
1551         else
1552                 tx_pool = &adapter->tx_pool[queue_num];
1553
1554         tx_scrq = adapter->tx_scrq[queue_num];
1555         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1556         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1557                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1558
1559         index = tx_pool->free_map[tx_pool->consumer_index];
1560
1561         if (index == IBMVNIC_INVALID_MAP) {
1562                 dev_kfree_skb_any(skb);
1563                 tx_send_failed++;
1564                 tx_dropped++;
1565                 ret = NETDEV_TX_OK;
1566                 goto out;
1567         }
1568
1569         tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1570
1571         offset = index * tx_pool->buf_size;
1572         dst = tx_pool->long_term_buff.buff + offset;
1573         memset(dst, 0, tx_pool->buf_size);
1574         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1575
1576         if (skb_shinfo(skb)->nr_frags) {
1577                 int cur, i;
1578
1579                 /* Copy the head */
1580                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1581                 cur = skb_headlen(skb);
1582
1583                 /* Copy the frags */
1584                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1585                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1586
1587                         memcpy(dst + cur,
1588                                page_address(skb_frag_page(frag)) +
1589                                skb_frag_off(frag), skb_frag_size(frag));
1590                         cur += skb_frag_size(frag);
1591                 }
1592         } else {
1593                 skb_copy_from_linear_data(skb, dst, skb->len);
1594         }
1595
1596         tx_pool->consumer_index =
1597             (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1598
1599         tx_buff = &tx_pool->tx_buff[index];
1600         tx_buff->skb = skb;
1601         tx_buff->data_dma[0] = data_dma_addr;
1602         tx_buff->data_len[0] = skb->len;
1603         tx_buff->index = index;
1604         tx_buff->pool_index = queue_num;
1605         tx_buff->last_frag = true;
1606
1607         memset(&tx_crq, 0, sizeof(tx_crq));
1608         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1609         tx_crq.v1.type = IBMVNIC_TX_DESC;
1610         tx_crq.v1.n_crq_elem = 1;
1611         tx_crq.v1.n_sge = 1;
1612         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1613
1614         if (skb_is_gso(skb))
1615                 tx_crq.v1.correlator =
1616                         cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1617         else
1618                 tx_crq.v1.correlator = cpu_to_be32(index);
1619         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1620         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1621         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1622
1623         if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1624                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1625                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1626         }
1627
1628         if (skb->protocol == htons(ETH_P_IP)) {
1629                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1630                 proto = ip_hdr(skb)->protocol;
1631         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1632                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1633                 proto = ipv6_hdr(skb)->nexthdr;
1634         }
1635
1636         if (proto == IPPROTO_TCP)
1637                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1638         else if (proto == IPPROTO_UDP)
1639                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1640
1641         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1642                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1643                 hdrs += 2;
1644         }
1645         if (skb_is_gso(skb)) {
1646                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1647                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1648                 hdrs += 2;
1649         }
1650         /* determine if l2/3/4 headers are sent to firmware */
1651         if ((*hdrs >> 7) & 1) {
1652                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1653                 tx_crq.v1.n_crq_elem = num_entries;
1654                 tx_buff->num_entries = num_entries;
1655                 tx_buff->indir_arr[0] = tx_crq;
1656                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1657                                                     sizeof(tx_buff->indir_arr),
1658                                                     DMA_TO_DEVICE);
1659                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1660                         dev_kfree_skb_any(skb);
1661                         tx_buff->skb = NULL;
1662                         if (!firmware_has_feature(FW_FEATURE_CMO))
1663                                 dev_err(dev, "tx: unable to map descriptor array\n");
1664                         tx_map_failed++;
1665                         tx_dropped++;
1666                         ret = NETDEV_TX_OK;
1667                         goto tx_err_out;
1668                 }
1669                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1670                                                (u64)tx_buff->indir_dma,
1671                                                (u64)num_entries);
1672                 dma_unmap_single(dev, tx_buff->indir_dma,
1673                                  sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
1674         } else {
1675                 tx_buff->num_entries = num_entries;
1676                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1677                                       &tx_crq);
1678         }
1679         if (lpar_rc != H_SUCCESS) {
1680                 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1681                         dev_err_ratelimited(dev, "tx: send failed\n");
1682                 dev_kfree_skb_any(skb);
1683                 tx_buff->skb = NULL;
1684
1685                 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1686                         /* Disable TX and report carrier off if queue is closed
1687                          * or pending failover.
1688                          * Firmware guarantees that a signal will be sent to the
1689                          * driver, triggering a reset or some other action.
1690                          */
1691                         netif_tx_stop_all_queues(netdev);
1692                         netif_carrier_off(netdev);
1693                 }
1694
1695                 tx_send_failed++;
1696                 tx_dropped++;
1697                 ret = NETDEV_TX_OK;
1698                 goto tx_err_out;
1699         }
1700
1701         if (atomic_add_return(num_entries, &tx_scrq->used)
1702                                         >= adapter->req_tx_entries_per_subcrq) {
1703                 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1704                 netif_stop_subqueue(netdev, queue_num);
1705         }
1706
1707         tx_packets++;
1708         tx_bytes += skb->len;
1709         txq->trans_start = jiffies;
1710         ret = NETDEV_TX_OK;
1711         goto out;
1712
1713 tx_err_out:
1714         /* roll back consumer index and map array*/
1715         if (tx_pool->consumer_index == 0)
1716                 tx_pool->consumer_index =
1717                         tx_pool->num_buffers - 1;
1718         else
1719                 tx_pool->consumer_index--;
1720         tx_pool->free_map[tx_pool->consumer_index] = index;
1721 out:
1722         netdev->stats.tx_dropped += tx_dropped;
1723         netdev->stats.tx_bytes += tx_bytes;
1724         netdev->stats.tx_packets += tx_packets;
1725         adapter->tx_send_failed += tx_send_failed;
1726         adapter->tx_map_failed += tx_map_failed;
1727         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1728         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1729         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1730
1731         return ret;
1732 }
1733
1734 static void ibmvnic_set_multi(struct net_device *netdev)
1735 {
1736         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1737         struct netdev_hw_addr *ha;
1738         union ibmvnic_crq crq;
1739
1740         memset(&crq, 0, sizeof(crq));
1741         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1742         crq.request_capability.cmd = REQUEST_CAPABILITY;
1743
1744         if (netdev->flags & IFF_PROMISC) {
1745                 if (!adapter->promisc_supported)
1746                         return;
1747         } else {
1748                 if (netdev->flags & IFF_ALLMULTI) {
1749                         /* Accept all multicast */
1750                         memset(&crq, 0, sizeof(crq));
1751                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1752                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1753                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1754                         ibmvnic_send_crq(adapter, &crq);
1755                 } else if (netdev_mc_empty(netdev)) {
1756                         /* Reject all multicast */
1757                         memset(&crq, 0, sizeof(crq));
1758                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1759                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1760                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1761                         ibmvnic_send_crq(adapter, &crq);
1762                 } else {
1763                         /* Accept one or more multicast(s) */
1764                         netdev_for_each_mc_addr(ha, netdev) {
1765                                 memset(&crq, 0, sizeof(crq));
1766                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1767                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1768                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1769                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1770                                                 ha->addr);
1771                                 ibmvnic_send_crq(adapter, &crq);
1772                         }
1773                 }
1774         }
1775 }
1776
1777 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1778 {
1779         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1780         union ibmvnic_crq crq;
1781         int rc;
1782
1783         if (!is_valid_ether_addr(dev_addr)) {
1784                 rc = -EADDRNOTAVAIL;
1785                 goto err;
1786         }
1787
1788         memset(&crq, 0, sizeof(crq));
1789         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1790         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1791         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1792
1793         mutex_lock(&adapter->fw_lock);
1794         adapter->fw_done_rc = 0;
1795         reinit_completion(&adapter->fw_done);
1796
1797         rc = ibmvnic_send_crq(adapter, &crq);
1798         if (rc) {
1799                 rc = -EIO;
1800                 mutex_unlock(&adapter->fw_lock);
1801                 goto err;
1802         }
1803
1804         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1805         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1806         if (rc || adapter->fw_done_rc) {
1807                 rc = -EIO;
1808                 mutex_unlock(&adapter->fw_lock);
1809                 goto err;
1810         }
1811         mutex_unlock(&adapter->fw_lock);
1812         return 0;
1813 err:
1814         ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1815         return rc;
1816 }
1817
1818 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1819 {
1820         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1821         struct sockaddr *addr = p;
1822         int rc;
1823
1824         rc = 0;
1825         ether_addr_copy(adapter->mac_addr, addr->sa_data);
1826         if (adapter->state != VNIC_PROBED)
1827                 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1828
1829         return rc;
1830 }
1831
1832 /**
1833  * do_change_param_reset returns zero if we are able to keep processing reset
1834  * events, or non-zero if we hit a fatal error and must halt.
1835  */
1836 static int do_change_param_reset(struct ibmvnic_adapter *adapter,
1837                                  struct ibmvnic_rwi *rwi,
1838                                  u32 reset_state)
1839 {
1840         struct net_device *netdev = adapter->netdev;
1841         int i, rc;
1842
1843         netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
1844                    rwi->reset_reason);
1845
1846         netif_carrier_off(netdev);
1847         adapter->reset_reason = rwi->reset_reason;
1848
1849         ibmvnic_cleanup(netdev);
1850
1851         if (reset_state == VNIC_OPEN) {
1852                 rc = __ibmvnic_close(netdev);
1853                 if (rc)
1854                         return rc;
1855         }
1856
1857         release_resources(adapter);
1858         release_sub_crqs(adapter, 1);
1859         release_crq_queue(adapter);
1860
1861         adapter->state = VNIC_PROBED;
1862
1863         rc = init_crq_queue(adapter);
1864
1865         if (rc) {
1866                 netdev_err(adapter->netdev,
1867                            "Couldn't initialize crq. rc=%d\n", rc);
1868                 return rc;
1869         }
1870
1871         rc = ibmvnic_reset_init(adapter);
1872         if (rc)
1873                 return IBMVNIC_INIT_FAILED;
1874
1875         /* If the adapter was in PROBE state prior to the reset,
1876          * exit here.
1877          */
1878         if (reset_state == VNIC_PROBED)
1879                 return 0;
1880
1881         rc = ibmvnic_login(netdev);
1882         if (rc) {
1883                 adapter->state = reset_state;
1884                 return rc;
1885         }
1886
1887         rc = init_resources(adapter);
1888         if (rc)
1889                 return rc;
1890
1891         ibmvnic_disable_irqs(adapter);
1892
1893         adapter->state = VNIC_CLOSED;
1894
1895         if (reset_state == VNIC_CLOSED)
1896                 return 0;
1897
1898         rc = __ibmvnic_open(netdev);
1899         if (rc)
1900                 return IBMVNIC_OPEN_FAILED;
1901
1902         /* refresh device's multicast list */
1903         ibmvnic_set_multi(netdev);
1904
1905         /* kick napi */
1906         for (i = 0; i < adapter->req_rx_queues; i++)
1907                 napi_schedule(&adapter->napi[i]);
1908
1909         return 0;
1910 }
1911
1912 /**
1913  * do_reset returns zero if we are able to keep processing reset events, or
1914  * non-zero if we hit a fatal error and must halt.
1915  */
1916 static int do_reset(struct ibmvnic_adapter *adapter,
1917                     struct ibmvnic_rwi *rwi, u32 reset_state)
1918 {
1919         u64 old_num_rx_queues, old_num_tx_queues;
1920         u64 old_num_rx_slots, old_num_tx_slots;
1921         struct net_device *netdev = adapter->netdev;
1922         int i, rc;
1923
1924         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1925                    rwi->reset_reason);
1926
1927         rtnl_lock();
1928
1929         netif_carrier_off(netdev);
1930         adapter->reset_reason = rwi->reset_reason;
1931
1932         old_num_rx_queues = adapter->req_rx_queues;
1933         old_num_tx_queues = adapter->req_tx_queues;
1934         old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1935         old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1936
1937         ibmvnic_cleanup(netdev);
1938
1939         if (reset_state == VNIC_OPEN &&
1940             adapter->reset_reason != VNIC_RESET_MOBILITY &&
1941             adapter->reset_reason != VNIC_RESET_FAILOVER) {
1942                 adapter->state = VNIC_CLOSING;
1943
1944                 /* Release the RTNL lock before link state change and
1945                  * re-acquire after the link state change to allow
1946                  * linkwatch_event to grab the RTNL lock and run during
1947                  * a reset.
1948                  */
1949                 rtnl_unlock();
1950                 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1951                 rtnl_lock();
1952                 if (rc)
1953                         goto out;
1954
1955                 if (adapter->state != VNIC_CLOSING) {
1956                         rc = -1;
1957                         goto out;
1958                 }
1959
1960                 adapter->state = VNIC_CLOSED;
1961         }
1962
1963         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1964                 /* remove the closed state so when we call open it appears
1965                  * we are coming from the probed state.
1966                  */
1967                 adapter->state = VNIC_PROBED;
1968
1969                 if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1970                         rc = ibmvnic_reenable_crq_queue(adapter);
1971                         release_sub_crqs(adapter, 1);
1972                 } else {
1973                         rc = ibmvnic_reset_crq(adapter);
1974                         if (rc == H_CLOSED || rc == H_SUCCESS) {
1975                                 rc = vio_enable_interrupts(adapter->vdev);
1976                                 if (rc)
1977                                         netdev_err(adapter->netdev,
1978                                                    "Reset failed to enable interrupts. rc=%d\n",
1979                                                    rc);
1980                         }
1981                 }
1982
1983                 if (rc) {
1984                         netdev_err(adapter->netdev,
1985                                    "Reset couldn't initialize crq. rc=%d\n", rc);
1986                         goto out;
1987                 }
1988
1989                 rc = ibmvnic_reset_init(adapter);
1990                 if (rc) {
1991                         rc = IBMVNIC_INIT_FAILED;
1992                         goto out;
1993                 }
1994
1995                 /* If the adapter was in PROBE state prior to the reset,
1996                  * exit here.
1997                  */
1998                 if (reset_state == VNIC_PROBED) {
1999                         rc = 0;
2000                         goto out;
2001                 }
2002
2003                 rc = ibmvnic_login(netdev);
2004                 if (rc) {
2005                         adapter->state = reset_state;
2006                         goto out;
2007                 }
2008
2009                 if (adapter->req_rx_queues != old_num_rx_queues ||
2010                     adapter->req_tx_queues != old_num_tx_queues ||
2011                     adapter->req_rx_add_entries_per_subcrq !=
2012                     old_num_rx_slots ||
2013                     adapter->req_tx_entries_per_subcrq !=
2014                     old_num_tx_slots) {
2015                         release_rx_pools(adapter);
2016                         release_tx_pools(adapter);
2017                         release_napi(adapter);
2018                         release_vpd_data(adapter);
2019
2020                         rc = init_resources(adapter);
2021                         if (rc)
2022                                 goto out;
2023
2024                 } else {
2025                         rc = reset_tx_pools(adapter);
2026                         if (rc)
2027                                 goto out;
2028
2029                         rc = reset_rx_pools(adapter);
2030                         if (rc)
2031                                 goto out;
2032                 }
2033                 ibmvnic_disable_irqs(adapter);
2034         }
2035         adapter->state = VNIC_CLOSED;
2036
2037         if (reset_state == VNIC_CLOSED) {
2038                 rc = 0;
2039                 goto out;
2040         }
2041
2042         rc = __ibmvnic_open(netdev);
2043         if (rc) {
2044                 rc = IBMVNIC_OPEN_FAILED;
2045                 goto out;
2046         }
2047
2048         /* refresh device's multicast list */
2049         ibmvnic_set_multi(netdev);
2050
2051         /* kick napi */
2052         for (i = 0; i < adapter->req_rx_queues; i++)
2053                 napi_schedule(&adapter->napi[i]);
2054
2055         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
2056                 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2057
2058         rc = 0;
2059
2060 out:
2061         rtnl_unlock();
2062
2063         return rc;
2064 }
2065
2066 static int do_hard_reset(struct ibmvnic_adapter *adapter,
2067                          struct ibmvnic_rwi *rwi, u32 reset_state)
2068 {
2069         struct net_device *netdev = adapter->netdev;
2070         int rc;
2071
2072         netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
2073                    rwi->reset_reason);
2074
2075         netif_carrier_off(netdev);
2076         adapter->reset_reason = rwi->reset_reason;
2077
2078         ibmvnic_cleanup(netdev);
2079         release_resources(adapter);
2080         release_sub_crqs(adapter, 0);
2081         release_crq_queue(adapter);
2082
2083         /* remove the closed state so when we call open it appears
2084          * we are coming from the probed state.
2085          */
2086         adapter->state = VNIC_PROBED;
2087
2088         reinit_completion(&adapter->init_done);
2089         rc = init_crq_queue(adapter);
2090         if (rc) {
2091                 netdev_err(adapter->netdev,
2092                            "Couldn't initialize crq. rc=%d\n", rc);
2093                 return rc;
2094         }
2095
2096         rc = ibmvnic_init(adapter);
2097         if (rc)
2098                 return rc;
2099
2100         /* If the adapter was in PROBE state prior to the reset,
2101          * exit here.
2102          */
2103         if (reset_state == VNIC_PROBED)
2104                 return 0;
2105
2106         rc = ibmvnic_login(netdev);
2107         if (rc) {
2108                 adapter->state = VNIC_PROBED;
2109                 return 0;
2110         }
2111
2112         rc = init_resources(adapter);
2113         if (rc)
2114                 return rc;
2115
2116         ibmvnic_disable_irqs(adapter);
2117         adapter->state = VNIC_CLOSED;
2118
2119         if (reset_state == VNIC_CLOSED)
2120                 return 0;
2121
2122         rc = __ibmvnic_open(netdev);
2123         if (rc)
2124                 return IBMVNIC_OPEN_FAILED;
2125
2126         return 0;
2127 }
2128
2129 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2130 {
2131         struct ibmvnic_rwi *rwi;
2132         unsigned long flags;
2133
2134         spin_lock_irqsave(&adapter->rwi_lock, flags);
2135
2136         if (!list_empty(&adapter->rwi_list)) {
2137                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2138                                        list);
2139                 list_del(&rwi->list);
2140         } else {
2141                 rwi = NULL;
2142         }
2143
2144         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2145         return rwi;
2146 }
2147
2148 static void free_all_rwi(struct ibmvnic_adapter *adapter)
2149 {
2150         struct ibmvnic_rwi *rwi;
2151
2152         rwi = get_next_rwi(adapter);
2153         while (rwi) {
2154                 kfree(rwi);
2155                 rwi = get_next_rwi(adapter);
2156         }
2157 }
2158
2159 static void __ibmvnic_reset(struct work_struct *work)
2160 {
2161         struct ibmvnic_rwi *rwi;
2162         struct ibmvnic_adapter *adapter;
2163         bool saved_state = false;
2164         unsigned long flags;
2165         u32 reset_state;
2166         int rc = 0;
2167
2168         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2169
2170         if (test_and_set_bit_lock(0, &adapter->resetting)) {
2171                 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2172                                       IBMVNIC_RESET_DELAY);
2173                 return;
2174         }
2175
2176         rwi = get_next_rwi(adapter);
2177         while (rwi) {
2178                 spin_lock_irqsave(&adapter->state_lock, flags);
2179
2180                 if (adapter->state == VNIC_REMOVING ||
2181                     adapter->state == VNIC_REMOVED) {
2182                         spin_unlock_irqrestore(&adapter->state_lock, flags);
2183                         kfree(rwi);
2184                         rc = EBUSY;
2185                         break;
2186                 }
2187
2188                 if (!saved_state) {
2189                         reset_state = adapter->state;
2190                         adapter->state = VNIC_RESETTING;
2191                         saved_state = true;
2192                 }
2193                 spin_unlock_irqrestore(&adapter->state_lock, flags);
2194
2195                 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2196                         /* CHANGE_PARAM requestor holds rtnl_lock */
2197                         rc = do_change_param_reset(adapter, rwi, reset_state);
2198                 } else if (adapter->force_reset_recovery) {
2199                         /* Transport event occurred during previous reset */
2200                         if (adapter->wait_for_reset) {
2201                                 /* Previous was CHANGE_PARAM; caller locked */
2202                                 adapter->force_reset_recovery = false;
2203                                 rc = do_hard_reset(adapter, rwi, reset_state);
2204                         } else {
2205                                 rtnl_lock();
2206                                 adapter->force_reset_recovery = false;
2207                                 rc = do_hard_reset(adapter, rwi, reset_state);
2208                                 rtnl_unlock();
2209                         }
2210                 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL &&
2211                                 adapter->from_passive_init)) {
2212                         rc = do_reset(adapter, rwi, reset_state);
2213                 }
2214                 kfree(rwi);
2215                 if (rc == IBMVNIC_OPEN_FAILED) {
2216                         if (list_empty(&adapter->rwi_list))
2217                                 adapter->state = VNIC_CLOSED;
2218                         else
2219                                 adapter->state = reset_state;
2220                         rc = 0;
2221                 } else if (rc && rc != IBMVNIC_INIT_FAILED &&
2222                     !adapter->force_reset_recovery)
2223                         break;
2224
2225                 rwi = get_next_rwi(adapter);
2226
2227                 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2228                             rwi->reset_reason == VNIC_RESET_MOBILITY))
2229                         adapter->force_reset_recovery = true;
2230         }
2231
2232         if (adapter->wait_for_reset) {
2233                 adapter->reset_done_rc = rc;
2234                 complete(&adapter->reset_done);
2235         }
2236
2237         if (rc) {
2238                 netdev_dbg(adapter->netdev, "Reset failed\n");
2239                 free_all_rwi(adapter);
2240         }
2241
2242         clear_bit_unlock(0, &adapter->resetting);
2243 }
2244
2245 static void __ibmvnic_delayed_reset(struct work_struct *work)
2246 {
2247         struct ibmvnic_adapter *adapter;
2248
2249         adapter = container_of(work, struct ibmvnic_adapter,
2250                                ibmvnic_delayed_reset.work);
2251         __ibmvnic_reset(&adapter->ibmvnic_reset);
2252 }
2253
2254 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2255                          enum ibmvnic_reset_reason reason)
2256 {
2257         struct list_head *entry, *tmp_entry;
2258         struct ibmvnic_rwi *rwi, *tmp;
2259         struct net_device *netdev = adapter->netdev;
2260         unsigned long flags;
2261         int ret;
2262
2263         if (adapter->state == VNIC_REMOVING ||
2264             adapter->state == VNIC_REMOVED ||
2265             adapter->failover_pending) {
2266                 ret = EBUSY;
2267                 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2268                 goto err;
2269         }
2270
2271         if (adapter->state == VNIC_PROBING) {
2272                 netdev_warn(netdev, "Adapter reset during probe\n");
2273                 ret = adapter->init_done_rc = EAGAIN;
2274                 goto err;
2275         }
2276
2277         spin_lock_irqsave(&adapter->rwi_lock, flags);
2278
2279         list_for_each(entry, &adapter->rwi_list) {
2280                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2281                 if (tmp->reset_reason == reason) {
2282                         netdev_dbg(netdev, "Skipping matching reset\n");
2283                         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2284                         ret = EBUSY;
2285                         goto err;
2286                 }
2287         }
2288
2289         rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2290         if (!rwi) {
2291                 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2292                 ibmvnic_close(netdev);
2293                 ret = ENOMEM;
2294                 goto err;
2295         }
2296         /* if we just received a transport event,
2297          * flush reset queue and process this reset
2298          */
2299         if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2300                 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2301                         list_del(entry);
2302         }
2303         rwi->reset_reason = reason;
2304         list_add_tail(&rwi->list, &adapter->rwi_list);
2305         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2306         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2307         schedule_work(&adapter->ibmvnic_reset);
2308
2309         return 0;
2310 err:
2311         return -ret;
2312 }
2313
2314 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2315 {
2316         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2317
2318         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2319 }
2320
2321 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2322                                   struct ibmvnic_rx_buff *rx_buff)
2323 {
2324         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2325
2326         rx_buff->skb = NULL;
2327
2328         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2329         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2330
2331         atomic_dec(&pool->available);
2332 }
2333
2334 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2335 {
2336         struct net_device *netdev = napi->dev;
2337         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2338         int scrq_num = (int)(napi - adapter->napi);
2339         int frames_processed = 0;
2340
2341 restart_poll:
2342         while (frames_processed < budget) {
2343                 struct sk_buff *skb;
2344                 struct ibmvnic_rx_buff *rx_buff;
2345                 union sub_crq *next;
2346                 u32 length;
2347                 u16 offset;
2348                 u8 flags = 0;
2349
2350                 if (unlikely(test_bit(0, &adapter->resetting) &&
2351                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2352                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2353                         napi_complete_done(napi, frames_processed);
2354                         return frames_processed;
2355                 }
2356
2357                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2358                         break;
2359                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2360                 rx_buff =
2361                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2362                                                           rx_comp.correlator);
2363                 /* do error checking */
2364                 if (next->rx_comp.rc) {
2365                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2366                                    be16_to_cpu(next->rx_comp.rc));
2367                         /* free the entry */
2368                         next->rx_comp.first = 0;
2369                         dev_kfree_skb_any(rx_buff->skb);
2370                         remove_buff_from_pool(adapter, rx_buff);
2371                         continue;
2372                 } else if (!rx_buff->skb) {
2373                         /* free the entry */
2374                         next->rx_comp.first = 0;
2375                         remove_buff_from_pool(adapter, rx_buff);
2376                         continue;
2377                 }
2378
2379                 length = be32_to_cpu(next->rx_comp.len);
2380                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2381                 flags = next->rx_comp.flags;
2382                 skb = rx_buff->skb;
2383                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2384                                         length);
2385
2386                 /* VLAN Header has been stripped by the system firmware and
2387                  * needs to be inserted by the driver
2388                  */
2389                 if (adapter->rx_vlan_header_insertion &&
2390                     (flags & IBMVNIC_VLAN_STRIPPED))
2391                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2392                                                ntohs(next->rx_comp.vlan_tci));
2393
2394                 /* free the entry */
2395                 next->rx_comp.first = 0;
2396                 remove_buff_from_pool(adapter, rx_buff);
2397
2398                 skb_put(skb, length);
2399                 skb->protocol = eth_type_trans(skb, netdev);
2400                 skb_record_rx_queue(skb, scrq_num);
2401
2402                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2403                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2404                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2405                 }
2406
2407                 length = skb->len;
2408                 napi_gro_receive(napi, skb); /* send it up */
2409                 netdev->stats.rx_packets++;
2410                 netdev->stats.rx_bytes += length;
2411                 adapter->rx_stats_buffers[scrq_num].packets++;
2412                 adapter->rx_stats_buffers[scrq_num].bytes += length;
2413                 frames_processed++;
2414         }
2415
2416         if (adapter->state != VNIC_CLOSING)
2417                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2418
2419         if (frames_processed < budget) {
2420                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2421                 napi_complete_done(napi, frames_processed);
2422                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2423                     napi_reschedule(napi)) {
2424                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2425                         goto restart_poll;
2426                 }
2427         }
2428         return frames_processed;
2429 }
2430
2431 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2432 {
2433         int rc, ret;
2434
2435         adapter->fallback.mtu = adapter->req_mtu;
2436         adapter->fallback.rx_queues = adapter->req_rx_queues;
2437         adapter->fallback.tx_queues = adapter->req_tx_queues;
2438         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2439         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2440
2441         reinit_completion(&adapter->reset_done);
2442         adapter->wait_for_reset = true;
2443         rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2444
2445         if (rc) {
2446                 ret = rc;
2447                 goto out;
2448         }
2449         rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2450         if (rc) {
2451                 ret = -ENODEV;
2452                 goto out;
2453         }
2454
2455         ret = 0;
2456         if (adapter->reset_done_rc) {
2457                 ret = -EIO;
2458                 adapter->desired.mtu = adapter->fallback.mtu;
2459                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2460                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2461                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2462                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2463
2464                 reinit_completion(&adapter->reset_done);
2465                 adapter->wait_for_reset = true;
2466                 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2467                 if (rc) {
2468                         ret = rc;
2469                         goto out;
2470                 }
2471                 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2472                                                  60000);
2473                 if (rc) {
2474                         ret = -ENODEV;
2475                         goto out;
2476                 }
2477         }
2478 out:
2479         adapter->wait_for_reset = false;
2480
2481         return ret;
2482 }
2483
2484 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2485 {
2486         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2487
2488         adapter->desired.mtu = new_mtu + ETH_HLEN;
2489
2490         return wait_for_reset(adapter);
2491 }
2492
2493 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2494                                                 struct net_device *dev,
2495                                                 netdev_features_t features)
2496 {
2497         /* Some backing hardware adapters can not
2498          * handle packets with a MSS less than 224
2499          * or with only one segment.
2500          */
2501         if (skb_is_gso(skb)) {
2502                 if (skb_shinfo(skb)->gso_size < 224 ||
2503                     skb_shinfo(skb)->gso_segs == 1)
2504                         features &= ~NETIF_F_GSO_MASK;
2505         }
2506
2507         return features;
2508 }
2509
2510 static const struct net_device_ops ibmvnic_netdev_ops = {
2511         .ndo_open               = ibmvnic_open,
2512         .ndo_stop               = ibmvnic_close,
2513         .ndo_start_xmit         = ibmvnic_xmit,
2514         .ndo_set_rx_mode        = ibmvnic_set_multi,
2515         .ndo_set_mac_address    = ibmvnic_set_mac,
2516         .ndo_validate_addr      = eth_validate_addr,
2517         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2518         .ndo_change_mtu         = ibmvnic_change_mtu,
2519         .ndo_features_check     = ibmvnic_features_check,
2520 };
2521
2522 /* ethtool functions */
2523
2524 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2525                                       struct ethtool_link_ksettings *cmd)
2526 {
2527         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2528         int rc;
2529
2530         rc = send_query_phys_parms(adapter);
2531         if (rc) {
2532                 adapter->speed = SPEED_UNKNOWN;
2533                 adapter->duplex = DUPLEX_UNKNOWN;
2534         }
2535         cmd->base.speed = adapter->speed;
2536         cmd->base.duplex = adapter->duplex;
2537         cmd->base.port = PORT_FIBRE;
2538         cmd->base.phy_address = 0;
2539         cmd->base.autoneg = AUTONEG_ENABLE;
2540
2541         return 0;
2542 }
2543
2544 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2545                                 struct ethtool_drvinfo *info)
2546 {
2547         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2548
2549         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2550         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2551         strlcpy(info->fw_version, adapter->fw_version,
2552                 sizeof(info->fw_version));
2553 }
2554
2555 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2556 {
2557         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2558
2559         return adapter->msg_enable;
2560 }
2561
2562 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2563 {
2564         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2565
2566         adapter->msg_enable = data;
2567 }
2568
2569 static u32 ibmvnic_get_link(struct net_device *netdev)
2570 {
2571         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2572
2573         /* Don't need to send a query because we request a logical link up at
2574          * init and then we wait for link state indications
2575          */
2576         return adapter->logical_link_state;
2577 }
2578
2579 static void ibmvnic_get_ringparam(struct net_device *netdev,
2580                                   struct ethtool_ringparam *ring)
2581 {
2582         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2583
2584         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2585                 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2586                 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2587         } else {
2588                 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2589                 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2590         }
2591         ring->rx_mini_max_pending = 0;
2592         ring->rx_jumbo_max_pending = 0;
2593         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2594         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2595         ring->rx_mini_pending = 0;
2596         ring->rx_jumbo_pending = 0;
2597 }
2598
2599 static int ibmvnic_set_ringparam(struct net_device *netdev,
2600                                  struct ethtool_ringparam *ring)
2601 {
2602         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2603         int ret;
2604
2605         ret = 0;
2606         adapter->desired.rx_entries = ring->rx_pending;
2607         adapter->desired.tx_entries = ring->tx_pending;
2608
2609         ret = wait_for_reset(adapter);
2610
2611         if (!ret &&
2612             (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2613              adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2614                 netdev_info(netdev,
2615                             "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2616                             ring->rx_pending, ring->tx_pending,
2617                             adapter->req_rx_add_entries_per_subcrq,
2618                             adapter->req_tx_entries_per_subcrq);
2619         return ret;
2620 }
2621
2622 static void ibmvnic_get_channels(struct net_device *netdev,
2623                                  struct ethtool_channels *channels)
2624 {
2625         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2626
2627         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2628                 channels->max_rx = adapter->max_rx_queues;
2629                 channels->max_tx = adapter->max_tx_queues;
2630         } else {
2631                 channels->max_rx = IBMVNIC_MAX_QUEUES;
2632                 channels->max_tx = IBMVNIC_MAX_QUEUES;
2633         }
2634
2635         channels->max_other = 0;
2636         channels->max_combined = 0;
2637         channels->rx_count = adapter->req_rx_queues;
2638         channels->tx_count = adapter->req_tx_queues;
2639         channels->other_count = 0;
2640         channels->combined_count = 0;
2641 }
2642
2643 static int ibmvnic_set_channels(struct net_device *netdev,
2644                                 struct ethtool_channels *channels)
2645 {
2646         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2647         int ret;
2648
2649         ret = 0;
2650         adapter->desired.rx_queues = channels->rx_count;
2651         adapter->desired.tx_queues = channels->tx_count;
2652
2653         ret = wait_for_reset(adapter);
2654
2655         if (!ret &&
2656             (adapter->req_rx_queues != channels->rx_count ||
2657              adapter->req_tx_queues != channels->tx_count))
2658                 netdev_info(netdev,
2659                             "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2660                             channels->rx_count, channels->tx_count,
2661                             adapter->req_rx_queues, adapter->req_tx_queues);
2662         return ret;
2663
2664 }
2665
2666 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2667 {
2668         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2669         int i;
2670
2671         switch (stringset) {
2672         case ETH_SS_STATS:
2673                 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2674                                 i++, data += ETH_GSTRING_LEN)
2675                         memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2676
2677                 for (i = 0; i < adapter->req_tx_queues; i++) {
2678                         snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2679                         data += ETH_GSTRING_LEN;
2680
2681                         snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2682                         data += ETH_GSTRING_LEN;
2683
2684                         snprintf(data, ETH_GSTRING_LEN,
2685                                  "tx%d_dropped_packets", i);
2686                         data += ETH_GSTRING_LEN;
2687                 }
2688
2689                 for (i = 0; i < adapter->req_rx_queues; i++) {
2690                         snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2691                         data += ETH_GSTRING_LEN;
2692
2693                         snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2694                         data += ETH_GSTRING_LEN;
2695
2696                         snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2697                         data += ETH_GSTRING_LEN;
2698                 }
2699                 break;
2700
2701         case ETH_SS_PRIV_FLAGS:
2702                 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2703                         strcpy(data + i * ETH_GSTRING_LEN,
2704                                ibmvnic_priv_flags[i]);
2705                 break;
2706         default:
2707                 return;
2708         }
2709 }
2710
2711 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2712 {
2713         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2714
2715         switch (sset) {
2716         case ETH_SS_STATS:
2717                 return ARRAY_SIZE(ibmvnic_stats) +
2718                        adapter->req_tx_queues * NUM_TX_STATS +
2719                        adapter->req_rx_queues * NUM_RX_STATS;
2720         case ETH_SS_PRIV_FLAGS:
2721                 return ARRAY_SIZE(ibmvnic_priv_flags);
2722         default:
2723                 return -EOPNOTSUPP;
2724         }
2725 }
2726
2727 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2728                                       struct ethtool_stats *stats, u64 *data)
2729 {
2730         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2731         union ibmvnic_crq crq;
2732         int i, j;
2733         int rc;
2734
2735         memset(&crq, 0, sizeof(crq));
2736         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2737         crq.request_statistics.cmd = REQUEST_STATISTICS;
2738         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2739         crq.request_statistics.len =
2740             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2741
2742         /* Wait for data to be written */
2743         reinit_completion(&adapter->stats_done);
2744         rc = ibmvnic_send_crq(adapter, &crq);
2745         if (rc)
2746                 return;
2747         rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2748         if (rc)
2749                 return;
2750
2751         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2752                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2753                                                 ibmvnic_stats[i].offset));
2754
2755         for (j = 0; j < adapter->req_tx_queues; j++) {
2756                 data[i] = adapter->tx_stats_buffers[j].packets;
2757                 i++;
2758                 data[i] = adapter->tx_stats_buffers[j].bytes;
2759                 i++;
2760                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2761                 i++;
2762         }
2763
2764         for (j = 0; j < adapter->req_rx_queues; j++) {
2765                 data[i] = adapter->rx_stats_buffers[j].packets;
2766                 i++;
2767                 data[i] = adapter->rx_stats_buffers[j].bytes;
2768                 i++;
2769                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2770                 i++;
2771         }
2772 }
2773
2774 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2775 {
2776         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2777
2778         return adapter->priv_flags;
2779 }
2780
2781 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2782 {
2783         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2784         bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2785
2786         if (which_maxes)
2787                 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2788         else
2789                 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2790
2791         return 0;
2792 }
2793 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2794         .get_drvinfo            = ibmvnic_get_drvinfo,
2795         .get_msglevel           = ibmvnic_get_msglevel,
2796         .set_msglevel           = ibmvnic_set_msglevel,
2797         .get_link               = ibmvnic_get_link,
2798         .get_ringparam          = ibmvnic_get_ringparam,
2799         .set_ringparam          = ibmvnic_set_ringparam,
2800         .get_channels           = ibmvnic_get_channels,
2801         .set_channels           = ibmvnic_set_channels,
2802         .get_strings            = ibmvnic_get_strings,
2803         .get_sset_count         = ibmvnic_get_sset_count,
2804         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2805         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2806         .get_priv_flags         = ibmvnic_get_priv_flags,
2807         .set_priv_flags         = ibmvnic_set_priv_flags,
2808 };
2809
2810 /* Routines for managing CRQs/sCRQs  */
2811
2812 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2813                                    struct ibmvnic_sub_crq_queue *scrq)
2814 {
2815         int rc;
2816
2817         if (scrq->irq) {
2818                 free_irq(scrq->irq, scrq);
2819                 irq_dispose_mapping(scrq->irq);
2820                 scrq->irq = 0;
2821         }
2822
2823         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2824         atomic_set(&scrq->used, 0);
2825         scrq->cur = 0;
2826
2827         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2828                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2829         return rc;
2830 }
2831
2832 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2833 {
2834         int i, rc;
2835
2836         for (i = 0; i < adapter->req_tx_queues; i++) {
2837                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2838                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2839                 if (rc)
2840                         return rc;
2841         }
2842
2843         for (i = 0; i < adapter->req_rx_queues; i++) {
2844                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2845                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2846                 if (rc)
2847                         return rc;
2848         }
2849
2850         return rc;
2851 }
2852
2853 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2854                                   struct ibmvnic_sub_crq_queue *scrq,
2855                                   bool do_h_free)
2856 {
2857         struct device *dev = &adapter->vdev->dev;
2858         long rc;
2859
2860         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2861
2862         if (do_h_free) {
2863                 /* Close the sub-crqs */
2864                 do {
2865                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2866                                                 adapter->vdev->unit_address,
2867                                                 scrq->crq_num);
2868                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2869
2870                 if (rc) {
2871                         netdev_err(adapter->netdev,
2872                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2873                                    scrq->crq_num, rc);
2874                 }
2875         }
2876
2877         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2878                          DMA_BIDIRECTIONAL);
2879         free_pages((unsigned long)scrq->msgs, 2);
2880         kfree(scrq);
2881 }
2882
2883 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2884                                                         *adapter)
2885 {
2886         struct device *dev = &adapter->vdev->dev;
2887         struct ibmvnic_sub_crq_queue *scrq;
2888         int rc;
2889
2890         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2891         if (!scrq)
2892                 return NULL;
2893
2894         scrq->msgs =
2895                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2896         if (!scrq->msgs) {
2897                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2898                 goto zero_page_failed;
2899         }
2900
2901         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2902                                          DMA_BIDIRECTIONAL);
2903         if (dma_mapping_error(dev, scrq->msg_token)) {
2904                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2905                 goto map_failed;
2906         }
2907
2908         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2909                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2910
2911         if (rc == H_RESOURCE)
2912                 rc = ibmvnic_reset_crq(adapter);
2913
2914         if (rc == H_CLOSED) {
2915                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2916         } else if (rc) {
2917                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2918                 goto reg_failed;
2919         }
2920
2921         scrq->adapter = adapter;
2922         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2923         spin_lock_init(&scrq->lock);
2924
2925         netdev_dbg(adapter->netdev,
2926                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2927                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2928
2929         return scrq;
2930
2931 reg_failed:
2932         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2933                          DMA_BIDIRECTIONAL);
2934 map_failed:
2935         free_pages((unsigned long)scrq->msgs, 2);
2936 zero_page_failed:
2937         kfree(scrq);
2938
2939         return NULL;
2940 }
2941
2942 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2943 {
2944         int i;
2945
2946         if (adapter->tx_scrq) {
2947                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2948                         if (!adapter->tx_scrq[i])
2949                                 continue;
2950
2951                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2952                                    i);
2953                         if (adapter->tx_scrq[i]->irq) {
2954                                 free_irq(adapter->tx_scrq[i]->irq,
2955                                          adapter->tx_scrq[i]);
2956                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2957                                 adapter->tx_scrq[i]->irq = 0;
2958                         }
2959
2960                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2961                                               do_h_free);
2962                 }
2963
2964                 kfree(adapter->tx_scrq);
2965                 adapter->tx_scrq = NULL;
2966                 adapter->num_active_tx_scrqs = 0;
2967         }
2968
2969         if (adapter->rx_scrq) {
2970                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2971                         if (!adapter->rx_scrq[i])
2972                                 continue;
2973
2974                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2975                                    i);
2976                         if (adapter->rx_scrq[i]->irq) {
2977                                 free_irq(adapter->rx_scrq[i]->irq,
2978                                          adapter->rx_scrq[i]);
2979                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2980                                 adapter->rx_scrq[i]->irq = 0;
2981                         }
2982
2983                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2984                                               do_h_free);
2985                 }
2986
2987                 kfree(adapter->rx_scrq);
2988                 adapter->rx_scrq = NULL;
2989                 adapter->num_active_rx_scrqs = 0;
2990         }
2991 }
2992
2993 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2994                             struct ibmvnic_sub_crq_queue *scrq)
2995 {
2996         struct device *dev = &adapter->vdev->dev;
2997         unsigned long rc;
2998
2999         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3000                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3001         if (rc)
3002                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
3003                         scrq->hw_irq, rc);
3004         return rc;
3005 }
3006
3007 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
3008                            struct ibmvnic_sub_crq_queue *scrq)
3009 {
3010         struct device *dev = &adapter->vdev->dev;
3011         unsigned long rc;
3012
3013         if (scrq->hw_irq > 0x100000000ULL) {
3014                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
3015                 return 1;
3016         }
3017
3018         if (test_bit(0, &adapter->resetting) &&
3019             adapter->reset_reason == VNIC_RESET_MOBILITY) {
3020                 u64 val = (0xff000000) | scrq->hw_irq;
3021
3022                 rc = plpar_hcall_norets(H_EOI, val);
3023                 /* H_EOI would fail with rc = H_FUNCTION when running
3024                  * in XIVE mode which is expected, but not an error.
3025                  */
3026                 if (rc && (rc != H_FUNCTION))
3027                         dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3028                                 val, rc);
3029         }
3030
3031         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3032                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3033         if (rc)
3034                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3035                         scrq->hw_irq, rc);
3036         return rc;
3037 }
3038
3039 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3040                                struct ibmvnic_sub_crq_queue *scrq)
3041 {
3042         struct device *dev = &adapter->vdev->dev;
3043         struct ibmvnic_tx_pool *tx_pool;
3044         struct ibmvnic_tx_buff *txbuff;
3045         union sub_crq *next;
3046         int index;
3047         int i, j;
3048
3049 restart_loop:
3050         while (pending_scrq(adapter, scrq)) {
3051                 unsigned int pool = scrq->pool_index;
3052                 int num_entries = 0;
3053
3054                 next = ibmvnic_next_scrq(adapter, scrq);
3055                 for (i = 0; i < next->tx_comp.num_comps; i++) {
3056                         if (next->tx_comp.rcs[i]) {
3057                                 dev_err(dev, "tx error %x\n",
3058                                         next->tx_comp.rcs[i]);
3059                                 continue;
3060                         }
3061                         index = be32_to_cpu(next->tx_comp.correlators[i]);
3062                         if (index & IBMVNIC_TSO_POOL_MASK) {
3063                                 tx_pool = &adapter->tso_pool[pool];
3064                                 index &= ~IBMVNIC_TSO_POOL_MASK;
3065                         } else {
3066                                 tx_pool = &adapter->tx_pool[pool];
3067                         }
3068
3069                         txbuff = &tx_pool->tx_buff[index];
3070
3071                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
3072                                 if (!txbuff->data_dma[j])
3073                                         continue;
3074
3075                                 txbuff->data_dma[j] = 0;
3076                         }
3077
3078                         if (txbuff->last_frag) {
3079                                 dev_kfree_skb_any(txbuff->skb);
3080                                 txbuff->skb = NULL;
3081                         }
3082
3083                         num_entries += txbuff->num_entries;
3084
3085                         tx_pool->free_map[tx_pool->producer_index] = index;
3086                         tx_pool->producer_index =
3087                                 (tx_pool->producer_index + 1) %
3088                                         tx_pool->num_buffers;
3089                 }
3090                 /* remove tx_comp scrq*/
3091                 next->tx_comp.first = 0;
3092
3093                 if (atomic_sub_return(num_entries, &scrq->used) <=
3094                     (adapter->req_tx_entries_per_subcrq / 2) &&
3095                     __netif_subqueue_stopped(adapter->netdev,
3096                                              scrq->pool_index)) {
3097                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3098                         netdev_dbg(adapter->netdev, "Started queue %d\n",
3099                                    scrq->pool_index);
3100                 }
3101         }
3102
3103         enable_scrq_irq(adapter, scrq);
3104
3105         if (pending_scrq(adapter, scrq)) {
3106                 disable_scrq_irq(adapter, scrq);
3107                 goto restart_loop;
3108         }
3109
3110         return 0;
3111 }
3112
3113 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3114 {
3115         struct ibmvnic_sub_crq_queue *scrq = instance;
3116         struct ibmvnic_adapter *adapter = scrq->adapter;
3117
3118         disable_scrq_irq(adapter, scrq);
3119         ibmvnic_complete_tx(adapter, scrq);
3120
3121         return IRQ_HANDLED;
3122 }
3123
3124 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3125 {
3126         struct ibmvnic_sub_crq_queue *scrq = instance;
3127         struct ibmvnic_adapter *adapter = scrq->adapter;
3128
3129         /* When booting a kdump kernel we can hit pending interrupts
3130          * prior to completing driver initialization.
3131          */
3132         if (unlikely(adapter->state != VNIC_OPEN))
3133                 return IRQ_NONE;
3134
3135         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3136
3137         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3138                 disable_scrq_irq(adapter, scrq);
3139                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3140         }
3141
3142         return IRQ_HANDLED;
3143 }
3144
3145 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3146 {
3147         struct device *dev = &adapter->vdev->dev;
3148         struct ibmvnic_sub_crq_queue *scrq;
3149         int i = 0, j = 0;
3150         int rc = 0;
3151
3152         for (i = 0; i < adapter->req_tx_queues; i++) {
3153                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3154                            i);
3155                 scrq = adapter->tx_scrq[i];
3156                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3157
3158                 if (!scrq->irq) {
3159                         rc = -EINVAL;
3160                         dev_err(dev, "Error mapping irq\n");
3161                         goto req_tx_irq_failed;
3162                 }
3163
3164                 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3165                          adapter->vdev->unit_address, i);
3166                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3167                                  0, scrq->name, scrq);
3168
3169                 if (rc) {
3170                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3171                                 scrq->irq, rc);
3172                         irq_dispose_mapping(scrq->irq);
3173                         goto req_tx_irq_failed;
3174                 }
3175         }
3176
3177         for (i = 0; i < adapter->req_rx_queues; i++) {
3178                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3179                            i);
3180                 scrq = adapter->rx_scrq[i];
3181                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3182                 if (!scrq->irq) {
3183                         rc = -EINVAL;
3184                         dev_err(dev, "Error mapping irq\n");
3185                         goto req_rx_irq_failed;
3186                 }
3187                 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3188                          adapter->vdev->unit_address, i);
3189                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3190                                  0, scrq->name, scrq);
3191                 if (rc) {
3192                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3193                                 scrq->irq, rc);
3194                         irq_dispose_mapping(scrq->irq);
3195                         goto req_rx_irq_failed;
3196                 }
3197         }
3198         return rc;
3199
3200 req_rx_irq_failed:
3201         for (j = 0; j < i; j++) {
3202                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3203                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3204         }
3205         i = adapter->req_tx_queues;
3206 req_tx_irq_failed:
3207         for (j = 0; j < i; j++) {
3208                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3209                 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
3210         }
3211         release_sub_crqs(adapter, 1);
3212         return rc;
3213 }
3214
3215 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3216 {
3217         struct device *dev = &adapter->vdev->dev;
3218         struct ibmvnic_sub_crq_queue **allqueues;
3219         int registered_queues = 0;
3220         int total_queues;
3221         int more = 0;
3222         int i;
3223
3224         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3225
3226         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3227         if (!allqueues)
3228                 return -1;
3229
3230         for (i = 0; i < total_queues; i++) {
3231                 allqueues[i] = init_sub_crq_queue(adapter);
3232                 if (!allqueues[i]) {
3233                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3234                         break;
3235                 }
3236                 registered_queues++;
3237         }
3238
3239         /* Make sure we were able to register the minimum number of queues */
3240         if (registered_queues <
3241             adapter->min_tx_queues + adapter->min_rx_queues) {
3242                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
3243                 goto tx_failed;
3244         }
3245
3246         /* Distribute the failed allocated queues*/
3247         for (i = 0; i < total_queues - registered_queues + more ; i++) {
3248                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3249                 switch (i % 3) {
3250                 case 0:
3251                         if (adapter->req_rx_queues > adapter->min_rx_queues)
3252                                 adapter->req_rx_queues--;
3253                         else
3254                                 more++;
3255                         break;
3256                 case 1:
3257                         if (adapter->req_tx_queues > adapter->min_tx_queues)
3258                                 adapter->req_tx_queues--;
3259                         else
3260                                 more++;
3261                         break;
3262                 }
3263         }
3264
3265         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3266                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
3267         if (!adapter->tx_scrq)
3268                 goto tx_failed;
3269
3270         for (i = 0; i < adapter->req_tx_queues; i++) {
3271                 adapter->tx_scrq[i] = allqueues[i];
3272                 adapter->tx_scrq[i]->pool_index = i;
3273                 adapter->num_active_tx_scrqs++;
3274         }
3275
3276         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3277                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
3278         if (!adapter->rx_scrq)
3279                 goto rx_failed;
3280
3281         for (i = 0; i < adapter->req_rx_queues; i++) {
3282                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3283                 adapter->rx_scrq[i]->scrq_num = i;
3284                 adapter->num_active_rx_scrqs++;
3285         }
3286
3287         kfree(allqueues);
3288         return 0;
3289
3290 rx_failed:
3291         kfree(adapter->tx_scrq);
3292         adapter->tx_scrq = NULL;
3293 tx_failed:
3294         for (i = 0; i < registered_queues; i++)
3295                 release_sub_crq_queue(adapter, allqueues[i], 1);
3296         kfree(allqueues);
3297         return -1;
3298 }
3299
3300 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3301 {
3302         struct device *dev = &adapter->vdev->dev;
3303         union ibmvnic_crq crq;
3304         int max_entries;
3305
3306         if (!retry) {
3307                 /* Sub-CRQ entries are 32 byte long */
3308                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3309
3310                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3311                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
3312                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3313                         return;
3314                 }
3315
3316                 if (adapter->desired.mtu)
3317                         adapter->req_mtu = adapter->desired.mtu;
3318                 else
3319                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3320
3321                 if (!adapter->desired.tx_entries)
3322                         adapter->desired.tx_entries =
3323                                         adapter->max_tx_entries_per_subcrq;
3324                 if (!adapter->desired.rx_entries)
3325                         adapter->desired.rx_entries =
3326                                         adapter->max_rx_add_entries_per_subcrq;
3327
3328                 max_entries = IBMVNIC_MAX_LTB_SIZE /
3329                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3330
3331                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3332                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3333                         adapter->desired.tx_entries = max_entries;
3334                 }
3335
3336                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3337                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3338                         adapter->desired.rx_entries = max_entries;
3339                 }
3340
3341                 if (adapter->desired.tx_entries)
3342                         adapter->req_tx_entries_per_subcrq =
3343                                         adapter->desired.tx_entries;
3344                 else
3345                         adapter->req_tx_entries_per_subcrq =
3346                                         adapter->max_tx_entries_per_subcrq;
3347
3348                 if (adapter->desired.rx_entries)
3349                         adapter->req_rx_add_entries_per_subcrq =
3350                                         adapter->desired.rx_entries;
3351                 else
3352                         adapter->req_rx_add_entries_per_subcrq =
3353                                         adapter->max_rx_add_entries_per_subcrq;
3354
3355                 if (adapter->desired.tx_queues)
3356                         adapter->req_tx_queues =
3357                                         adapter->desired.tx_queues;
3358                 else
3359                         adapter->req_tx_queues =
3360                                         adapter->opt_tx_comp_sub_queues;
3361
3362                 if (adapter->desired.rx_queues)
3363                         adapter->req_rx_queues =
3364                                         adapter->desired.rx_queues;
3365                 else
3366                         adapter->req_rx_queues =
3367                                         adapter->opt_rx_comp_queues;
3368
3369                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3370         }
3371
3372         memset(&crq, 0, sizeof(crq));
3373         crq.request_capability.first = IBMVNIC_CRQ_CMD;
3374         crq.request_capability.cmd = REQUEST_CAPABILITY;
3375
3376         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3377         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3378         atomic_inc(&adapter->running_cap_crqs);
3379         ibmvnic_send_crq(adapter, &crq);
3380
3381         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3382         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3383         atomic_inc(&adapter->running_cap_crqs);
3384         ibmvnic_send_crq(adapter, &crq);
3385
3386         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3387         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3388         atomic_inc(&adapter->running_cap_crqs);
3389         ibmvnic_send_crq(adapter, &crq);
3390
3391         crq.request_capability.capability =
3392             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3393         crq.request_capability.number =
3394             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3395         atomic_inc(&adapter->running_cap_crqs);
3396         ibmvnic_send_crq(adapter, &crq);
3397
3398         crq.request_capability.capability =
3399             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3400         crq.request_capability.number =
3401             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3402         atomic_inc(&adapter->running_cap_crqs);
3403         ibmvnic_send_crq(adapter, &crq);
3404
3405         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3406         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3407         atomic_inc(&adapter->running_cap_crqs);
3408         ibmvnic_send_crq(adapter, &crq);
3409
3410         if (adapter->netdev->flags & IFF_PROMISC) {
3411                 if (adapter->promisc_supported) {
3412                         crq.request_capability.capability =
3413                             cpu_to_be16(PROMISC_REQUESTED);
3414                         crq.request_capability.number = cpu_to_be64(1);
3415                         atomic_inc(&adapter->running_cap_crqs);
3416                         ibmvnic_send_crq(adapter, &crq);
3417                 }
3418         } else {
3419                 crq.request_capability.capability =
3420                     cpu_to_be16(PROMISC_REQUESTED);
3421                 crq.request_capability.number = cpu_to_be64(0);
3422                 atomic_inc(&adapter->running_cap_crqs);
3423                 ibmvnic_send_crq(adapter, &crq);
3424         }
3425 }
3426
3427 static int pending_scrq(struct ibmvnic_adapter *adapter,
3428                         struct ibmvnic_sub_crq_queue *scrq)
3429 {
3430         union sub_crq *entry = &scrq->msgs[scrq->cur];
3431
3432         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3433                 return 1;
3434         else
3435                 return 0;
3436 }
3437
3438 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3439                                         struct ibmvnic_sub_crq_queue *scrq)
3440 {
3441         union sub_crq *entry;
3442         unsigned long flags;
3443
3444         spin_lock_irqsave(&scrq->lock, flags);
3445         entry = &scrq->msgs[scrq->cur];
3446         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3447                 if (++scrq->cur == scrq->size)
3448                         scrq->cur = 0;
3449         } else {
3450                 entry = NULL;
3451         }
3452         spin_unlock_irqrestore(&scrq->lock, flags);
3453
3454         return entry;
3455 }
3456
3457 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3458 {
3459         struct ibmvnic_crq_queue *queue = &adapter->crq;
3460         union ibmvnic_crq *crq;
3461
3462         crq = &queue->msgs[queue->cur];
3463         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3464                 if (++queue->cur == queue->size)
3465                         queue->cur = 0;
3466         } else {
3467                 crq = NULL;
3468         }
3469
3470         return crq;
3471 }
3472
3473 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3474 {
3475         switch (rc) {
3476         case H_PARAMETER:
3477                 dev_warn_ratelimited(dev,
3478                                      "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3479                                      func, rc);
3480                 break;
3481         case H_CLOSED:
3482                 dev_warn_ratelimited(dev,
3483                                      "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3484                                      func, rc);
3485                 break;
3486         default:
3487                 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3488                 break;
3489         }
3490 }
3491
3492 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3493                        union sub_crq *sub_crq)
3494 {
3495         unsigned int ua = adapter->vdev->unit_address;
3496         struct device *dev = &adapter->vdev->dev;
3497         u64 *u64_crq = (u64 *)sub_crq;
3498         int rc;
3499
3500         netdev_dbg(adapter->netdev,
3501                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3502                    (unsigned long int)cpu_to_be64(remote_handle),
3503                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3504                    (unsigned long int)cpu_to_be64(u64_crq[1]),
3505                    (unsigned long int)cpu_to_be64(u64_crq[2]),
3506                    (unsigned long int)cpu_to_be64(u64_crq[3]));
3507
3508         /* Make sure the hypervisor sees the complete request */
3509         mb();
3510
3511         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3512                                 cpu_to_be64(remote_handle),
3513                                 cpu_to_be64(u64_crq[0]),
3514                                 cpu_to_be64(u64_crq[1]),
3515                                 cpu_to_be64(u64_crq[2]),
3516                                 cpu_to_be64(u64_crq[3]));
3517
3518         if (rc)
3519                 print_subcrq_error(dev, rc, __func__);
3520
3521         return rc;
3522 }
3523
3524 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3525                                 u64 remote_handle, u64 ioba, u64 num_entries)
3526 {
3527         unsigned int ua = adapter->vdev->unit_address;
3528         struct device *dev = &adapter->vdev->dev;
3529         int rc;
3530
3531         /* Make sure the hypervisor sees the complete request */
3532         mb();
3533         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3534                                 cpu_to_be64(remote_handle),
3535                                 ioba, num_entries);
3536
3537         if (rc)
3538                 print_subcrq_error(dev, rc, __func__);
3539
3540         return rc;
3541 }
3542
3543 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3544                             union ibmvnic_crq *crq)
3545 {
3546         unsigned int ua = adapter->vdev->unit_address;
3547         struct device *dev = &adapter->vdev->dev;
3548         u64 *u64_crq = (u64 *)crq;
3549         int rc;
3550
3551         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3552                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3553                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3554
3555         if (!adapter->crq.active &&
3556             crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3557                 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3558                 return -EINVAL;
3559         }
3560
3561         /* Make sure the hypervisor sees the complete request */
3562         mb();
3563
3564         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3565                                 cpu_to_be64(u64_crq[0]),
3566                                 cpu_to_be64(u64_crq[1]));
3567
3568         if (rc) {
3569                 if (rc == H_CLOSED) {
3570                         dev_warn(dev, "CRQ Queue closed\n");
3571                         if (test_bit(0, &adapter->resetting))
3572                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3573                 }
3574
3575                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3576         }
3577
3578         return rc;
3579 }
3580
3581 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3582 {
3583         union ibmvnic_crq crq;
3584
3585         memset(&crq, 0, sizeof(crq));
3586         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3587         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3588         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3589
3590         return ibmvnic_send_crq(adapter, &crq);
3591 }
3592
3593 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3594 {
3595         union ibmvnic_crq crq;
3596
3597         memset(&crq, 0, sizeof(crq));
3598         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3599         crq.version_exchange.cmd = VERSION_EXCHANGE;
3600         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3601
3602         return ibmvnic_send_crq(adapter, &crq);
3603 }
3604
3605 struct vnic_login_client_data {
3606         u8      type;
3607         __be16  len;
3608         char    name[];
3609 } __packed;
3610
3611 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3612 {
3613         int len;
3614
3615         /* Calculate the amount of buffer space needed for the
3616          * vnic client data in the login buffer. There are four entries,
3617          * OS name, LPAR name, device name, and a null last entry.
3618          */
3619         len = 4 * sizeof(struct vnic_login_client_data);
3620         len += 6; /* "Linux" plus NULL */
3621         len += strlen(utsname()->nodename) + 1;
3622         len += strlen(adapter->netdev->name) + 1;
3623
3624         return len;
3625 }
3626
3627 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3628                                  struct vnic_login_client_data *vlcd)
3629 {
3630         const char *os_name = "Linux";
3631         int len;
3632
3633         /* Type 1 - LPAR OS */
3634         vlcd->type = 1;
3635         len = strlen(os_name) + 1;
3636         vlcd->len = cpu_to_be16(len);
3637         strncpy(vlcd->name, os_name, len);
3638         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3639
3640         /* Type 2 - LPAR name */
3641         vlcd->type = 2;
3642         len = strlen(utsname()->nodename) + 1;
3643         vlcd->len = cpu_to_be16(len);
3644         strncpy(vlcd->name, utsname()->nodename, len);
3645         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3646
3647         /* Type 3 - device name */
3648         vlcd->type = 3;
3649         len = strlen(adapter->netdev->name) + 1;
3650         vlcd->len = cpu_to_be16(len);
3651         strncpy(vlcd->name, adapter->netdev->name, len);
3652 }
3653
3654 static int send_login(struct ibmvnic_adapter *adapter)
3655 {
3656         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3657         struct ibmvnic_login_buffer *login_buffer;
3658         struct device *dev = &adapter->vdev->dev;
3659         dma_addr_t rsp_buffer_token;
3660         dma_addr_t buffer_token;
3661         size_t rsp_buffer_size;
3662         union ibmvnic_crq crq;
3663         size_t buffer_size;
3664         __be64 *tx_list_p;
3665         __be64 *rx_list_p;
3666         int client_data_len;
3667         struct vnic_login_client_data *vlcd;
3668         int i;
3669
3670         if (!adapter->tx_scrq || !adapter->rx_scrq) {
3671                 netdev_err(adapter->netdev,
3672                            "RX or TX queues are not allocated, device login failed\n");
3673                 return -1;
3674         }
3675
3676         release_login_rsp_buffer(adapter);
3677         client_data_len = vnic_client_data_len(adapter);
3678
3679         buffer_size =
3680             sizeof(struct ibmvnic_login_buffer) +
3681             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3682             client_data_len;
3683
3684         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3685         if (!login_buffer)
3686                 goto buf_alloc_failed;
3687
3688         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3689                                       DMA_TO_DEVICE);
3690         if (dma_mapping_error(dev, buffer_token)) {
3691                 dev_err(dev, "Couldn't map login buffer\n");
3692                 goto buf_map_failed;
3693         }
3694
3695         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3696                           sizeof(u64) * adapter->req_tx_queues +
3697                           sizeof(u64) * adapter->req_rx_queues +
3698                           sizeof(u64) * adapter->req_rx_queues +
3699                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3700
3701         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3702         if (!login_rsp_buffer)
3703                 goto buf_rsp_alloc_failed;
3704
3705         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3706                                           rsp_buffer_size, DMA_FROM_DEVICE);
3707         if (dma_mapping_error(dev, rsp_buffer_token)) {
3708                 dev_err(dev, "Couldn't map login rsp buffer\n");
3709                 goto buf_rsp_map_failed;
3710         }
3711
3712         adapter->login_buf = login_buffer;
3713         adapter->login_buf_token = buffer_token;
3714         adapter->login_buf_sz = buffer_size;
3715         adapter->login_rsp_buf = login_rsp_buffer;
3716         adapter->login_rsp_buf_token = rsp_buffer_token;
3717         adapter->login_rsp_buf_sz = rsp_buffer_size;
3718
3719         login_buffer->len = cpu_to_be32(buffer_size);
3720         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3721         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3722         login_buffer->off_txcomp_subcrqs =
3723             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3724         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3725         login_buffer->off_rxcomp_subcrqs =
3726             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3727                         sizeof(u64) * adapter->req_tx_queues);
3728         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3729         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3730
3731         tx_list_p = (__be64 *)((char *)login_buffer +
3732                                       sizeof(struct ibmvnic_login_buffer));
3733         rx_list_p = (__be64 *)((char *)login_buffer +
3734                                       sizeof(struct ibmvnic_login_buffer) +
3735                                       sizeof(u64) * adapter->req_tx_queues);
3736
3737         for (i = 0; i < adapter->req_tx_queues; i++) {
3738                 if (adapter->tx_scrq[i]) {
3739                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3740                                                    crq_num);
3741                 }
3742         }
3743
3744         for (i = 0; i < adapter->req_rx_queues; i++) {
3745                 if (adapter->rx_scrq[i]) {
3746                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3747                                                    crq_num);
3748                 }
3749         }
3750
3751         /* Insert vNIC login client data */
3752         vlcd = (struct vnic_login_client_data *)
3753                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3754         login_buffer->client_data_offset =
3755                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3756         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3757
3758         vnic_add_client_data(adapter, vlcd);
3759
3760         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3761         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3762                 netdev_dbg(adapter->netdev, "%016lx\n",
3763                            ((unsigned long int *)(adapter->login_buf))[i]);
3764         }
3765
3766         memset(&crq, 0, sizeof(crq));
3767         crq.login.first = IBMVNIC_CRQ_CMD;
3768         crq.login.cmd = LOGIN;
3769         crq.login.ioba = cpu_to_be32(buffer_token);
3770         crq.login.len = cpu_to_be32(buffer_size);
3771         ibmvnic_send_crq(adapter, &crq);
3772
3773         return 0;
3774
3775 buf_rsp_map_failed:
3776         kfree(login_rsp_buffer);
3777 buf_rsp_alloc_failed:
3778         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3779 buf_map_failed:
3780         kfree(login_buffer);
3781 buf_alloc_failed:
3782         return -1;
3783 }
3784
3785 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3786                             u32 len, u8 map_id)
3787 {
3788         union ibmvnic_crq crq;
3789
3790         memset(&crq, 0, sizeof(crq));
3791         crq.request_map.first = IBMVNIC_CRQ_CMD;
3792         crq.request_map.cmd = REQUEST_MAP;
3793         crq.request_map.map_id = map_id;
3794         crq.request_map.ioba = cpu_to_be32(addr);
3795         crq.request_map.len = cpu_to_be32(len);
3796         return ibmvnic_send_crq(adapter, &crq);
3797 }
3798
3799 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3800 {
3801         union ibmvnic_crq crq;
3802
3803         memset(&crq, 0, sizeof(crq));
3804         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3805         crq.request_unmap.cmd = REQUEST_UNMAP;
3806         crq.request_unmap.map_id = map_id;
3807         return ibmvnic_send_crq(adapter, &crq);
3808 }
3809
3810 static void send_map_query(struct ibmvnic_adapter *adapter)
3811 {
3812         union ibmvnic_crq crq;
3813
3814         memset(&crq, 0, sizeof(crq));
3815         crq.query_map.first = IBMVNIC_CRQ_CMD;
3816         crq.query_map.cmd = QUERY_MAP;
3817         ibmvnic_send_crq(adapter, &crq);
3818 }
3819
3820 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3821 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3822 {
3823         union ibmvnic_crq crq;
3824
3825         atomic_set(&adapter->running_cap_crqs, 0);
3826         memset(&crq, 0, sizeof(crq));
3827         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3828         crq.query_capability.cmd = QUERY_CAPABILITY;
3829
3830         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3831         atomic_inc(&adapter->running_cap_crqs);
3832         ibmvnic_send_crq(adapter, &crq);
3833
3834         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3835         atomic_inc(&adapter->running_cap_crqs);
3836         ibmvnic_send_crq(adapter, &crq);
3837
3838         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3839         atomic_inc(&adapter->running_cap_crqs);
3840         ibmvnic_send_crq(adapter, &crq);
3841
3842         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3843         atomic_inc(&adapter->running_cap_crqs);
3844         ibmvnic_send_crq(adapter, &crq);
3845
3846         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3847         atomic_inc(&adapter->running_cap_crqs);
3848         ibmvnic_send_crq(adapter, &crq);
3849
3850         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3851         atomic_inc(&adapter->running_cap_crqs);
3852         ibmvnic_send_crq(adapter, &crq);
3853
3854         crq.query_capability.capability =
3855             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3856         atomic_inc(&adapter->running_cap_crqs);
3857         ibmvnic_send_crq(adapter, &crq);
3858
3859         crq.query_capability.capability =
3860             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3861         atomic_inc(&adapter->running_cap_crqs);
3862         ibmvnic_send_crq(adapter, &crq);
3863
3864         crq.query_capability.capability =
3865             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3866         atomic_inc(&adapter->running_cap_crqs);
3867         ibmvnic_send_crq(adapter, &crq);
3868
3869         crq.query_capability.capability =
3870             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3871         atomic_inc(&adapter->running_cap_crqs);
3872         ibmvnic_send_crq(adapter, &crq);
3873
3874         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3875         atomic_inc(&adapter->running_cap_crqs);
3876         ibmvnic_send_crq(adapter, &crq);
3877
3878         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3879         atomic_inc(&adapter->running_cap_crqs);
3880         ibmvnic_send_crq(adapter, &crq);
3881
3882         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3883         atomic_inc(&adapter->running_cap_crqs);
3884         ibmvnic_send_crq(adapter, &crq);
3885
3886         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3887         atomic_inc(&adapter->running_cap_crqs);
3888         ibmvnic_send_crq(adapter, &crq);
3889
3890         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3891         atomic_inc(&adapter->running_cap_crqs);
3892         ibmvnic_send_crq(adapter, &crq);
3893
3894         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3895         atomic_inc(&adapter->running_cap_crqs);
3896         ibmvnic_send_crq(adapter, &crq);
3897
3898         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3899         atomic_inc(&adapter->running_cap_crqs);
3900         ibmvnic_send_crq(adapter, &crq);
3901
3902         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3903         atomic_inc(&adapter->running_cap_crqs);
3904         ibmvnic_send_crq(adapter, &crq);
3905
3906         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3907         atomic_inc(&adapter->running_cap_crqs);
3908         ibmvnic_send_crq(adapter, &crq);
3909
3910         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3911         atomic_inc(&adapter->running_cap_crqs);
3912         ibmvnic_send_crq(adapter, &crq);
3913
3914         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3915         atomic_inc(&adapter->running_cap_crqs);
3916         ibmvnic_send_crq(adapter, &crq);
3917
3918         crq.query_capability.capability =
3919                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3920         atomic_inc(&adapter->running_cap_crqs);
3921         ibmvnic_send_crq(adapter, &crq);
3922
3923         crq.query_capability.capability =
3924                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3925         atomic_inc(&adapter->running_cap_crqs);
3926         ibmvnic_send_crq(adapter, &crq);
3927
3928         crq.query_capability.capability =
3929                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3930         atomic_inc(&adapter->running_cap_crqs);
3931         ibmvnic_send_crq(adapter, &crq);
3932
3933         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3934         atomic_inc(&adapter->running_cap_crqs);
3935         ibmvnic_send_crq(adapter, &crq);
3936 }
3937
3938 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3939                                 struct ibmvnic_adapter *adapter)
3940 {
3941         struct device *dev = &adapter->vdev->dev;
3942
3943         if (crq->get_vpd_size_rsp.rc.code) {
3944                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3945                         crq->get_vpd_size_rsp.rc.code);
3946                 complete(&adapter->fw_done);
3947                 return;
3948         }
3949
3950         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3951         complete(&adapter->fw_done);
3952 }
3953
3954 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3955                            struct ibmvnic_adapter *adapter)
3956 {
3957         struct device *dev = &adapter->vdev->dev;
3958         unsigned char *substr = NULL;
3959         u8 fw_level_len = 0;
3960
3961         memset(adapter->fw_version, 0, 32);
3962
3963         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3964                          DMA_FROM_DEVICE);
3965
3966         if (crq->get_vpd_rsp.rc.code) {
3967                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3968                         crq->get_vpd_rsp.rc.code);
3969                 goto complete;
3970         }
3971
3972         /* get the position of the firmware version info
3973          * located after the ASCII 'RM' substring in the buffer
3974          */
3975         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3976         if (!substr) {
3977                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3978                 goto complete;
3979         }
3980
3981         /* get length of firmware level ASCII substring */
3982         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3983                 fw_level_len = *(substr + 2);
3984         } else {
3985                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3986                 goto complete;
3987         }
3988
3989         /* copy firmware version string from vpd into adapter */
3990         if ((substr + 3 + fw_level_len) <
3991             (adapter->vpd->buff + adapter->vpd->len)) {
3992                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3993         } else {
3994                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3995         }
3996
3997 complete:
3998         if (adapter->fw_version[0] == '\0')
3999                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4000         complete(&adapter->fw_done);
4001 }
4002
4003 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
4004 {
4005         struct device *dev = &adapter->vdev->dev;
4006         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4007         netdev_features_t old_hw_features = 0;
4008         union ibmvnic_crq crq;
4009         int i;
4010
4011         dma_unmap_single(dev, adapter->ip_offload_tok,
4012                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
4013
4014         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
4015         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
4016                 netdev_dbg(adapter->netdev, "%016lx\n",
4017                            ((unsigned long int *)(buf))[i]);
4018
4019         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4020         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4021         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4022                    buf->tcp_ipv4_chksum);
4023         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4024                    buf->tcp_ipv6_chksum);
4025         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4026                    buf->udp_ipv4_chksum);
4027         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4028                    buf->udp_ipv6_chksum);
4029         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4030                    buf->large_tx_ipv4);
4031         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4032                    buf->large_tx_ipv6);
4033         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4034                    buf->large_rx_ipv4);
4035         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4036                    buf->large_rx_ipv6);
4037         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4038                    buf->max_ipv4_header_size);
4039         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4040                    buf->max_ipv6_header_size);
4041         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4042                    buf->max_tcp_header_size);
4043         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4044                    buf->max_udp_header_size);
4045         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4046                    buf->max_large_tx_size);
4047         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4048                    buf->max_large_rx_size);
4049         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4050                    buf->ipv6_extension_header);
4051         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4052                    buf->tcp_pseudosum_req);
4053         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4054                    buf->num_ipv6_ext_headers);
4055         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4056                    buf->off_ipv6_ext_headers);
4057
4058         adapter->ip_offload_ctrl_tok =
4059             dma_map_single(dev, &adapter->ip_offload_ctrl,
4060                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
4061
4062         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4063                 dev_err(dev, "Couldn't map ip offload control buffer\n");
4064                 return;
4065         }
4066
4067         adapter->ip_offload_ctrl.len =
4068             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4069         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
4070         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
4071         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
4072         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4073         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
4074         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4075         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
4076         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
4077         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
4078
4079         /* large_rx disabled for now, additional features needed */
4080         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
4081         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
4082
4083         if (adapter->state != VNIC_PROBING) {
4084                 old_hw_features = adapter->netdev->hw_features;
4085                 adapter->netdev->hw_features = 0;
4086         }
4087
4088         adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4089
4090         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4091                 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4092
4093         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4094                 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4095
4096         if ((adapter->netdev->features &
4097             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4098                 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4099
4100         if (buf->large_tx_ipv4)
4101                 adapter->netdev->hw_features |= NETIF_F_TSO;
4102         if (buf->large_tx_ipv6)
4103                 adapter->netdev->hw_features |= NETIF_F_TSO6;
4104
4105         if (adapter->state == VNIC_PROBING) {
4106                 adapter->netdev->features |= adapter->netdev->hw_features;
4107         } else if (old_hw_features != adapter->netdev->hw_features) {
4108                 netdev_features_t tmp = 0;
4109
4110                 /* disable features no longer supported */
4111                 adapter->netdev->features &= adapter->netdev->hw_features;
4112                 /* turn on features now supported if previously enabled */
4113                 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4114                         adapter->netdev->hw_features;
4115                 adapter->netdev->features |=
4116                                 tmp & adapter->netdev->wanted_features;
4117         }
4118
4119         memset(&crq, 0, sizeof(crq));
4120         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4121         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4122         crq.control_ip_offload.len =
4123             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4124         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4125         ibmvnic_send_crq(adapter, &crq);
4126 }
4127
4128 static const char *ibmvnic_fw_err_cause(u16 cause)
4129 {
4130         switch (cause) {
4131         case ADAPTER_PROBLEM:
4132                 return "adapter problem";
4133         case BUS_PROBLEM:
4134                 return "bus problem";
4135         case FW_PROBLEM:
4136                 return "firmware problem";
4137         case DD_PROBLEM:
4138                 return "device driver problem";
4139         case EEH_RECOVERY:
4140                 return "EEH recovery";
4141         case FW_UPDATED:
4142                 return "firmware updated";
4143         case LOW_MEMORY:
4144                 return "low Memory";
4145         default:
4146                 return "unknown";
4147         }
4148 }
4149
4150 static void handle_error_indication(union ibmvnic_crq *crq,
4151                                     struct ibmvnic_adapter *adapter)
4152 {
4153         struct device *dev = &adapter->vdev->dev;
4154         u16 cause;
4155
4156         cause = be16_to_cpu(crq->error_indication.error_cause);
4157
4158         dev_warn_ratelimited(dev,
4159                              "Firmware reports %serror, cause: %s. Starting recovery...\n",
4160                              crq->error_indication.flags
4161                                 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4162                              ibmvnic_fw_err_cause(cause));
4163
4164         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4165                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4166         else
4167                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4168 }
4169
4170 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4171                                  struct ibmvnic_adapter *adapter)
4172 {
4173         struct net_device *netdev = adapter->netdev;
4174         struct device *dev = &adapter->vdev->dev;
4175         long rc;
4176
4177         rc = crq->change_mac_addr_rsp.rc.code;
4178         if (rc) {
4179                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4180                 goto out;
4181         }
4182         ether_addr_copy(netdev->dev_addr,
4183                         &crq->change_mac_addr_rsp.mac_addr[0]);
4184 out:
4185         complete(&adapter->fw_done);
4186         return rc;
4187 }
4188
4189 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4190                                    struct ibmvnic_adapter *adapter)
4191 {
4192         struct device *dev = &adapter->vdev->dev;
4193         u64 *req_value;
4194         char *name;
4195
4196         atomic_dec(&adapter->running_cap_crqs);
4197         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4198         case REQ_TX_QUEUES:
4199                 req_value = &adapter->req_tx_queues;
4200                 name = "tx";
4201                 break;
4202         case REQ_RX_QUEUES:
4203                 req_value = &adapter->req_rx_queues;
4204                 name = "rx";
4205                 break;
4206         case REQ_RX_ADD_QUEUES:
4207                 req_value = &adapter->req_rx_add_queues;
4208                 name = "rx_add";
4209                 break;
4210         case REQ_TX_ENTRIES_PER_SUBCRQ:
4211                 req_value = &adapter->req_tx_entries_per_subcrq;
4212                 name = "tx_entries_per_subcrq";
4213                 break;
4214         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4215                 req_value = &adapter->req_rx_add_entries_per_subcrq;
4216                 name = "rx_add_entries_per_subcrq";
4217                 break;
4218         case REQ_MTU:
4219                 req_value = &adapter->req_mtu;
4220                 name = "mtu";
4221                 break;
4222         case PROMISC_REQUESTED:
4223                 req_value = &adapter->promisc;
4224                 name = "promisc";
4225                 break;
4226         default:
4227                 dev_err(dev, "Got invalid cap request rsp %d\n",
4228                         crq->request_capability.capability);
4229                 return;
4230         }
4231
4232         switch (crq->request_capability_rsp.rc.code) {
4233         case SUCCESS:
4234                 break;
4235         case PARTIALSUCCESS:
4236                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4237                          *req_value,
4238                          (long int)be64_to_cpu(crq->request_capability_rsp.
4239                                                number), name);
4240
4241                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4242                     REQ_MTU) {
4243                         pr_err("mtu of %llu is not supported. Reverting.\n",
4244                                *req_value);
4245                         *req_value = adapter->fallback.mtu;
4246                 } else {
4247                         *req_value =
4248                                 be64_to_cpu(crq->request_capability_rsp.number);
4249                 }
4250
4251                 ibmvnic_send_req_caps(adapter, 1);
4252                 return;
4253         default:
4254                 dev_err(dev, "Error %d in request cap rsp\n",
4255                         crq->request_capability_rsp.rc.code);
4256                 return;
4257         }
4258
4259         /* Done receiving requested capabilities, query IP offload support */
4260         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4261                 union ibmvnic_crq newcrq;
4262                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4263                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4264                     &adapter->ip_offload_buf;
4265
4266                 adapter->wait_capability = false;
4267                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4268                                                          buf_sz,
4269                                                          DMA_FROM_DEVICE);
4270
4271                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4272                         if (!firmware_has_feature(FW_FEATURE_CMO))
4273                                 dev_err(dev, "Couldn't map offload buffer\n");
4274                         return;
4275                 }
4276
4277                 memset(&newcrq, 0, sizeof(newcrq));
4278                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4279                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4280                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4281                 newcrq.query_ip_offload.ioba =
4282                     cpu_to_be32(adapter->ip_offload_tok);
4283
4284                 ibmvnic_send_crq(adapter, &newcrq);
4285         }
4286 }
4287
4288 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4289                             struct ibmvnic_adapter *adapter)
4290 {
4291         struct device *dev = &adapter->vdev->dev;
4292         struct net_device *netdev = adapter->netdev;
4293         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4294         struct ibmvnic_login_buffer *login = adapter->login_buf;
4295         int i;
4296
4297         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4298                          DMA_TO_DEVICE);
4299         dma_unmap_single(dev, adapter->login_rsp_buf_token,
4300                          adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4301
4302         /* If the number of queues requested can't be allocated by the
4303          * server, the login response will return with code 1. We will need
4304          * to resend the login buffer with fewer queues requested.
4305          */
4306         if (login_rsp_crq->generic.rc.code) {
4307                 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4308                 complete(&adapter->init_done);
4309                 return 0;
4310         }
4311
4312         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4313
4314         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4315         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4316                 netdev_dbg(adapter->netdev, "%016lx\n",
4317                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4318         }
4319
4320         /* Sanity checks */
4321         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4322             (be32_to_cpu(login->num_rxcomp_subcrqs) *
4323              adapter->req_rx_add_queues !=
4324              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4325                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4326                 ibmvnic_remove(adapter->vdev);
4327                 return -EIO;
4328         }
4329         release_login_buffer(adapter);
4330         complete(&adapter->init_done);
4331
4332         return 0;
4333 }
4334
4335 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4336                                      struct ibmvnic_adapter *adapter)
4337 {
4338         struct device *dev = &adapter->vdev->dev;
4339         long rc;
4340
4341         rc = crq->request_unmap_rsp.rc.code;
4342         if (rc)
4343                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4344 }
4345
4346 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4347                                  struct ibmvnic_adapter *adapter)
4348 {
4349         struct net_device *netdev = adapter->netdev;
4350         struct device *dev = &adapter->vdev->dev;
4351         long rc;
4352
4353         rc = crq->query_map_rsp.rc.code;
4354         if (rc) {
4355                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4356                 return;
4357         }
4358         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4359                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4360                    crq->query_map_rsp.free_pages);
4361 }
4362
4363 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4364                                  struct ibmvnic_adapter *adapter)
4365 {
4366         struct net_device *netdev = adapter->netdev;
4367         struct device *dev = &adapter->vdev->dev;
4368         long rc;
4369
4370         atomic_dec(&adapter->running_cap_crqs);
4371         netdev_dbg(netdev, "Outstanding queries: %d\n",
4372                    atomic_read(&adapter->running_cap_crqs));
4373         rc = crq->query_capability.rc.code;
4374         if (rc) {
4375                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4376                 goto out;
4377         }
4378
4379         switch (be16_to_cpu(crq->query_capability.capability)) {
4380         case MIN_TX_QUEUES:
4381                 adapter->min_tx_queues =
4382                     be64_to_cpu(crq->query_capability.number);
4383                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4384                            adapter->min_tx_queues);
4385                 break;
4386         case MIN_RX_QUEUES:
4387                 adapter->min_rx_queues =
4388                     be64_to_cpu(crq->query_capability.number);
4389                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4390                            adapter->min_rx_queues);
4391                 break;
4392         case MIN_RX_ADD_QUEUES:
4393                 adapter->min_rx_add_queues =
4394                     be64_to_cpu(crq->query_capability.number);
4395                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4396                            adapter->min_rx_add_queues);
4397                 break;
4398         case MAX_TX_QUEUES:
4399                 adapter->max_tx_queues =
4400                     be64_to_cpu(crq->query_capability.number);
4401                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4402                            adapter->max_tx_queues);
4403                 break;
4404         case MAX_RX_QUEUES:
4405                 adapter->max_rx_queues =
4406                     be64_to_cpu(crq->query_capability.number);
4407                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4408                            adapter->max_rx_queues);
4409                 break;
4410         case MAX_RX_ADD_QUEUES:
4411                 adapter->max_rx_add_queues =
4412                     be64_to_cpu(crq->query_capability.number);
4413                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4414                            adapter->max_rx_add_queues);
4415                 break;
4416         case MIN_TX_ENTRIES_PER_SUBCRQ:
4417                 adapter->min_tx_entries_per_subcrq =
4418                     be64_to_cpu(crq->query_capability.number);
4419                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4420                            adapter->min_tx_entries_per_subcrq);
4421                 break;
4422         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4423                 adapter->min_rx_add_entries_per_subcrq =
4424                     be64_to_cpu(crq->query_capability.number);
4425                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4426                            adapter->min_rx_add_entries_per_subcrq);
4427                 break;
4428         case MAX_TX_ENTRIES_PER_SUBCRQ:
4429                 adapter->max_tx_entries_per_subcrq =
4430                     be64_to_cpu(crq->query_capability.number);
4431                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4432                            adapter->max_tx_entries_per_subcrq);
4433                 break;
4434         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4435                 adapter->max_rx_add_entries_per_subcrq =
4436                     be64_to_cpu(crq->query_capability.number);
4437                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4438                            adapter->max_rx_add_entries_per_subcrq);
4439                 break;
4440         case TCP_IP_OFFLOAD:
4441                 adapter->tcp_ip_offload =
4442                     be64_to_cpu(crq->query_capability.number);
4443                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4444                            adapter->tcp_ip_offload);
4445                 break;
4446         case PROMISC_SUPPORTED:
4447                 adapter->promisc_supported =
4448                     be64_to_cpu(crq->query_capability.number);
4449                 netdev_dbg(netdev, "promisc_supported = %lld\n",
4450                            adapter->promisc_supported);
4451                 break;
4452         case MIN_MTU:
4453                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4454                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4455                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4456                 break;
4457         case MAX_MTU:
4458                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4459                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4460                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4461                 break;
4462         case MAX_MULTICAST_FILTERS:
4463                 adapter->max_multicast_filters =
4464                     be64_to_cpu(crq->query_capability.number);
4465                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4466                            adapter->max_multicast_filters);
4467                 break;
4468         case VLAN_HEADER_INSERTION:
4469                 adapter->vlan_header_insertion =
4470                     be64_to_cpu(crq->query_capability.number);
4471                 if (adapter->vlan_header_insertion)
4472                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4473                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4474                            adapter->vlan_header_insertion);
4475                 break;
4476         case RX_VLAN_HEADER_INSERTION:
4477                 adapter->rx_vlan_header_insertion =
4478                     be64_to_cpu(crq->query_capability.number);
4479                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4480                            adapter->rx_vlan_header_insertion);
4481                 break;
4482         case MAX_TX_SG_ENTRIES:
4483                 adapter->max_tx_sg_entries =
4484                     be64_to_cpu(crq->query_capability.number);
4485                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4486                            adapter->max_tx_sg_entries);
4487                 break;
4488         case RX_SG_SUPPORTED:
4489                 adapter->rx_sg_supported =
4490                     be64_to_cpu(crq->query_capability.number);
4491                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4492                            adapter->rx_sg_supported);
4493                 break;
4494         case OPT_TX_COMP_SUB_QUEUES:
4495                 adapter->opt_tx_comp_sub_queues =
4496                     be64_to_cpu(crq->query_capability.number);
4497                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4498                            adapter->opt_tx_comp_sub_queues);
4499                 break;
4500         case OPT_RX_COMP_QUEUES:
4501                 adapter->opt_rx_comp_queues =
4502                     be64_to_cpu(crq->query_capability.number);
4503                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4504                            adapter->opt_rx_comp_queues);
4505                 break;
4506         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4507                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4508                     be64_to_cpu(crq->query_capability.number);
4509                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4510                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4511                 break;
4512         case OPT_TX_ENTRIES_PER_SUBCRQ:
4513                 adapter->opt_tx_entries_per_subcrq =
4514                     be64_to_cpu(crq->query_capability.number);
4515                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4516                            adapter->opt_tx_entries_per_subcrq);
4517                 break;
4518         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4519                 adapter->opt_rxba_entries_per_subcrq =
4520                     be64_to_cpu(crq->query_capability.number);
4521                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4522                            adapter->opt_rxba_entries_per_subcrq);
4523                 break;
4524         case TX_RX_DESC_REQ:
4525                 adapter->tx_rx_desc_req = crq->query_capability.number;
4526                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4527                            adapter->tx_rx_desc_req);
4528                 break;
4529
4530         default:
4531                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4532                            crq->query_capability.capability);
4533         }
4534
4535 out:
4536         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4537                 adapter->wait_capability = false;
4538                 ibmvnic_send_req_caps(adapter, 0);
4539         }
4540 }
4541
4542 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4543 {
4544         union ibmvnic_crq crq;
4545         int rc;
4546
4547         memset(&crq, 0, sizeof(crq));
4548         crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4549         crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4550
4551         mutex_lock(&adapter->fw_lock);
4552         adapter->fw_done_rc = 0;
4553         reinit_completion(&adapter->fw_done);
4554
4555         rc = ibmvnic_send_crq(adapter, &crq);
4556         if (rc) {
4557                 mutex_unlock(&adapter->fw_lock);
4558                 return rc;
4559         }
4560
4561         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4562         if (rc) {
4563                 mutex_unlock(&adapter->fw_lock);
4564                 return rc;
4565         }
4566
4567         mutex_unlock(&adapter->fw_lock);
4568         return adapter->fw_done_rc ? -EIO : 0;
4569 }
4570
4571 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4572                                        struct ibmvnic_adapter *adapter)
4573 {
4574         struct net_device *netdev = adapter->netdev;
4575         int rc;
4576         __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4577
4578         rc = crq->query_phys_parms_rsp.rc.code;
4579         if (rc) {
4580                 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4581                 return rc;
4582         }
4583         switch (rspeed) {
4584         case IBMVNIC_10MBPS:
4585                 adapter->speed = SPEED_10;
4586                 break;
4587         case IBMVNIC_100MBPS:
4588                 adapter->speed = SPEED_100;
4589                 break;
4590         case IBMVNIC_1GBPS:
4591                 adapter->speed = SPEED_1000;
4592                 break;
4593         case IBMVNIC_10GBP:
4594                 adapter->speed = SPEED_10000;
4595                 break;
4596         case IBMVNIC_25GBPS:
4597                 adapter->speed = SPEED_25000;
4598                 break;
4599         case IBMVNIC_40GBPS:
4600                 adapter->speed = SPEED_40000;
4601                 break;
4602         case IBMVNIC_50GBPS:
4603                 adapter->speed = SPEED_50000;
4604                 break;
4605         case IBMVNIC_100GBPS:
4606                 adapter->speed = SPEED_100000;
4607                 break;
4608         default:
4609                 if (netif_carrier_ok(netdev))
4610                         netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4611                 adapter->speed = SPEED_UNKNOWN;
4612         }
4613         if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4614                 adapter->duplex = DUPLEX_FULL;
4615         else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4616                 adapter->duplex = DUPLEX_HALF;
4617         else
4618                 adapter->duplex = DUPLEX_UNKNOWN;
4619
4620         return rc;
4621 }
4622
4623 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4624                                struct ibmvnic_adapter *adapter)
4625 {
4626         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4627         struct net_device *netdev = adapter->netdev;
4628         struct device *dev = &adapter->vdev->dev;
4629         u64 *u64_crq = (u64 *)crq;
4630         long rc;
4631
4632         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4633                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4634                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4635         switch (gen_crq->first) {
4636         case IBMVNIC_CRQ_INIT_RSP:
4637                 switch (gen_crq->cmd) {
4638                 case IBMVNIC_CRQ_INIT:
4639                         dev_info(dev, "Partner initialized\n");
4640                         adapter->from_passive_init = true;
4641                         adapter->failover_pending = false;
4642                         if (!completion_done(&adapter->init_done)) {
4643                                 complete(&adapter->init_done);
4644                                 adapter->init_done_rc = -EIO;
4645                         }
4646                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4647                         break;
4648                 case IBMVNIC_CRQ_INIT_COMPLETE:
4649                         dev_info(dev, "Partner initialization complete\n");
4650                         adapter->crq.active = true;
4651                         send_version_xchg(adapter);
4652                         break;
4653                 default:
4654                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4655                 }
4656                 return;
4657         case IBMVNIC_CRQ_XPORT_EVENT:
4658                 netif_carrier_off(netdev);
4659                 adapter->crq.active = false;
4660                 /* terminate any thread waiting for a response
4661                  * from the device
4662                  */
4663                 if (!completion_done(&adapter->fw_done)) {
4664                         adapter->fw_done_rc = -EIO;
4665                         complete(&adapter->fw_done);
4666                 }
4667                 if (!completion_done(&adapter->stats_done))
4668                         complete(&adapter->stats_done);
4669                 if (test_bit(0, &adapter->resetting))
4670                         adapter->force_reset_recovery = true;
4671                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4672                         dev_info(dev, "Migrated, re-enabling adapter\n");
4673                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4674                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4675                         dev_info(dev, "Backing device failover detected\n");
4676                         adapter->failover_pending = true;
4677                 } else {
4678                         /* The adapter lost the connection */
4679                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4680                                 gen_crq->cmd);
4681                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4682                 }
4683                 return;
4684         case IBMVNIC_CRQ_CMD_RSP:
4685                 break;
4686         default:
4687                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4688                         gen_crq->first);
4689                 return;
4690         }
4691
4692         switch (gen_crq->cmd) {
4693         case VERSION_EXCHANGE_RSP:
4694                 rc = crq->version_exchange_rsp.rc.code;
4695                 if (rc) {
4696                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4697                         break;
4698                 }
4699                 ibmvnic_version =
4700                             be16_to_cpu(crq->version_exchange_rsp.version);
4701                 dev_info(dev, "Partner protocol version is %d\n",
4702                          ibmvnic_version);
4703                 send_cap_queries(adapter);
4704                 break;
4705         case QUERY_CAPABILITY_RSP:
4706                 handle_query_cap_rsp(crq, adapter);
4707                 break;
4708         case QUERY_MAP_RSP:
4709                 handle_query_map_rsp(crq, adapter);
4710                 break;
4711         case REQUEST_MAP_RSP:
4712                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4713                 complete(&adapter->fw_done);
4714                 break;
4715         case REQUEST_UNMAP_RSP:
4716                 handle_request_unmap_rsp(crq, adapter);
4717                 break;
4718         case REQUEST_CAPABILITY_RSP:
4719                 handle_request_cap_rsp(crq, adapter);
4720                 break;
4721         case LOGIN_RSP:
4722                 netdev_dbg(netdev, "Got Login Response\n");
4723                 handle_login_rsp(crq, adapter);
4724                 break;
4725         case LOGICAL_LINK_STATE_RSP:
4726                 netdev_dbg(netdev,
4727                            "Got Logical Link State Response, state: %d rc: %d\n",
4728                            crq->logical_link_state_rsp.link_state,
4729                            crq->logical_link_state_rsp.rc.code);
4730                 adapter->logical_link_state =
4731                     crq->logical_link_state_rsp.link_state;
4732                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4733                 complete(&adapter->init_done);
4734                 break;
4735         case LINK_STATE_INDICATION:
4736                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4737                 adapter->phys_link_state =
4738                     crq->link_state_indication.phys_link_state;
4739                 adapter->logical_link_state =
4740                     crq->link_state_indication.logical_link_state;
4741                 if (adapter->phys_link_state && adapter->logical_link_state)
4742                         netif_carrier_on(netdev);
4743                 else
4744                         netif_carrier_off(netdev);
4745                 break;
4746         case CHANGE_MAC_ADDR_RSP:
4747                 netdev_dbg(netdev, "Got MAC address change Response\n");
4748                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4749                 break;
4750         case ERROR_INDICATION:
4751                 netdev_dbg(netdev, "Got Error Indication\n");
4752                 handle_error_indication(crq, adapter);
4753                 break;
4754         case REQUEST_STATISTICS_RSP:
4755                 netdev_dbg(netdev, "Got Statistics Response\n");
4756                 complete(&adapter->stats_done);
4757                 break;
4758         case QUERY_IP_OFFLOAD_RSP:
4759                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4760                 handle_query_ip_offload_rsp(adapter);
4761                 break;
4762         case MULTICAST_CTRL_RSP:
4763                 netdev_dbg(netdev, "Got multicast control Response\n");
4764                 break;
4765         case CONTROL_IP_OFFLOAD_RSP:
4766                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4767                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4768                                  sizeof(adapter->ip_offload_ctrl),
4769                                  DMA_TO_DEVICE);
4770                 complete(&adapter->init_done);
4771                 break;
4772         case COLLECT_FW_TRACE_RSP:
4773                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4774                 complete(&adapter->fw_done);
4775                 break;
4776         case GET_VPD_SIZE_RSP:
4777                 handle_vpd_size_rsp(crq, adapter);
4778                 break;
4779         case GET_VPD_RSP:
4780                 handle_vpd_rsp(crq, adapter);
4781                 break;
4782         case QUERY_PHYS_PARMS_RSP:
4783                 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
4784                 complete(&adapter->fw_done);
4785                 break;
4786         default:
4787                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4788                            gen_crq->cmd);
4789         }
4790 }
4791
4792 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4793 {
4794         struct ibmvnic_adapter *adapter = instance;
4795
4796         tasklet_schedule(&adapter->tasklet);
4797         return IRQ_HANDLED;
4798 }
4799
4800 static void ibmvnic_tasklet(void *data)
4801 {
4802         struct ibmvnic_adapter *adapter = data;
4803         struct ibmvnic_crq_queue *queue = &adapter->crq;
4804         union ibmvnic_crq *crq;
4805         unsigned long flags;
4806         bool done = false;
4807
4808         spin_lock_irqsave(&queue->lock, flags);
4809         while (!done) {
4810                 /* Pull all the valid messages off the CRQ */
4811                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4812                         ibmvnic_handle_crq(crq, adapter);
4813                         crq->generic.first = 0;
4814                 }
4815
4816                 /* remain in tasklet until all
4817                  * capabilities responses are received
4818                  */
4819                 if (!adapter->wait_capability)
4820                         done = true;
4821         }
4822         /* if capabilities CRQ's were sent in this tasklet, the following
4823          * tasklet must wait until all responses are received
4824          */
4825         if (atomic_read(&adapter->running_cap_crqs) != 0)
4826                 adapter->wait_capability = true;
4827         spin_unlock_irqrestore(&queue->lock, flags);
4828 }
4829
4830 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4831 {
4832         struct vio_dev *vdev = adapter->vdev;
4833         int rc;
4834
4835         do {
4836                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4837         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4838
4839         if (rc)
4840                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4841
4842         return rc;
4843 }
4844
4845 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4846 {
4847         struct ibmvnic_crq_queue *crq = &adapter->crq;
4848         struct device *dev = &adapter->vdev->dev;
4849         struct vio_dev *vdev = adapter->vdev;
4850         int rc;
4851
4852         /* Close the CRQ */
4853         do {
4854                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4855         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4856
4857         /* Clean out the queue */
4858         memset(crq->msgs, 0, PAGE_SIZE);
4859         crq->cur = 0;
4860         crq->active = false;
4861
4862         /* And re-open it again */
4863         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4864                                 crq->msg_token, PAGE_SIZE);
4865
4866         if (rc == H_CLOSED)
4867                 /* Adapter is good, but other end is not ready */
4868                 dev_warn(dev, "Partner adapter not ready\n");
4869         else if (rc != 0)
4870                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4871
4872         return rc;
4873 }
4874
4875 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4876 {
4877         struct ibmvnic_crq_queue *crq = &adapter->crq;
4878         struct vio_dev *vdev = adapter->vdev;
4879         long rc;
4880
4881         if (!crq->msgs)
4882                 return;
4883
4884         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4885         free_irq(vdev->irq, adapter);
4886         tasklet_kill(&adapter->tasklet);
4887         do {
4888                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4889         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4890
4891         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4892                          DMA_BIDIRECTIONAL);
4893         free_page((unsigned long)crq->msgs);
4894         crq->msgs = NULL;
4895         crq->active = false;
4896 }
4897
4898 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4899 {
4900         struct ibmvnic_crq_queue *crq = &adapter->crq;
4901         struct device *dev = &adapter->vdev->dev;
4902         struct vio_dev *vdev = adapter->vdev;
4903         int rc, retrc = -ENOMEM;
4904
4905         if (crq->msgs)
4906                 return 0;
4907
4908         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4909         /* Should we allocate more than one page? */
4910
4911         if (!crq->msgs)
4912                 return -ENOMEM;
4913
4914         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4915         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4916                                         DMA_BIDIRECTIONAL);
4917         if (dma_mapping_error(dev, crq->msg_token))
4918                 goto map_failed;
4919
4920         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4921                                 crq->msg_token, PAGE_SIZE);
4922
4923         if (rc == H_RESOURCE)
4924                 /* maybe kexecing and resource is busy. try a reset */
4925                 rc = ibmvnic_reset_crq(adapter);
4926         retrc = rc;
4927
4928         if (rc == H_CLOSED) {
4929                 dev_warn(dev, "Partner adapter not ready\n");
4930         } else if (rc) {
4931                 dev_warn(dev, "Error %d opening adapter\n", rc);
4932                 goto reg_crq_failed;
4933         }
4934
4935         retrc = 0;
4936
4937         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4938                      (unsigned long)adapter);
4939
4940         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4941         snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
4942                  adapter->vdev->unit_address);
4943         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
4944         if (rc) {
4945                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4946                         vdev->irq, rc);
4947                 goto req_irq_failed;
4948         }
4949
4950         rc = vio_enable_interrupts(vdev);
4951         if (rc) {
4952                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4953                 goto req_irq_failed;
4954         }
4955
4956         crq->cur = 0;
4957         spin_lock_init(&crq->lock);
4958
4959         return retrc;
4960
4961 req_irq_failed:
4962         tasklet_kill(&adapter->tasklet);
4963         do {
4964                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4965         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4966 reg_crq_failed:
4967         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4968 map_failed:
4969         free_page((unsigned long)crq->msgs);
4970         crq->msgs = NULL;
4971         return retrc;
4972 }
4973
4974 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4975 {
4976         struct device *dev = &adapter->vdev->dev;
4977         unsigned long timeout = msecs_to_jiffies(30000);
4978         u64 old_num_rx_queues, old_num_tx_queues;
4979         int rc;
4980
4981         adapter->from_passive_init = false;
4982
4983         old_num_rx_queues = adapter->req_rx_queues;
4984         old_num_tx_queues = adapter->req_tx_queues;
4985
4986         reinit_completion(&adapter->init_done);
4987         adapter->init_done_rc = 0;
4988         ibmvnic_send_crq_init(adapter);
4989         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4990                 dev_err(dev, "Initialization sequence timed out\n");
4991                 return -1;
4992         }
4993
4994         if (adapter->init_done_rc) {
4995                 release_crq_queue(adapter);
4996                 return adapter->init_done_rc;
4997         }
4998
4999         if (adapter->from_passive_init) {
5000                 adapter->state = VNIC_OPEN;
5001                 adapter->from_passive_init = false;
5002                 return -1;
5003         }
5004
5005         if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
5006             adapter->reset_reason != VNIC_RESET_MOBILITY) {
5007                 if (adapter->req_rx_queues != old_num_rx_queues ||
5008                     adapter->req_tx_queues != old_num_tx_queues) {
5009                         release_sub_crqs(adapter, 0);
5010                         rc = init_sub_crqs(adapter);
5011                 } else {
5012                         rc = reset_sub_crq_queues(adapter);
5013                 }
5014         } else {
5015                 rc = init_sub_crqs(adapter);
5016         }
5017
5018         if (rc) {
5019                 dev_err(dev, "Initialization of sub crqs failed\n");
5020                 release_crq_queue(adapter);
5021                 return rc;
5022         }
5023
5024         rc = init_sub_crq_irqs(adapter);
5025         if (rc) {
5026                 dev_err(dev, "Failed to initialize sub crq irqs\n");
5027                 release_crq_queue(adapter);
5028         }
5029
5030         return rc;
5031 }
5032
5033 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
5034 {
5035         struct device *dev = &adapter->vdev->dev;
5036         unsigned long timeout = msecs_to_jiffies(30000);
5037         int rc;
5038
5039         adapter->from_passive_init = false;
5040
5041         adapter->init_done_rc = 0;
5042         ibmvnic_send_crq_init(adapter);
5043         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5044                 dev_err(dev, "Initialization sequence timed out\n");
5045                 return -1;
5046         }
5047
5048         if (adapter->init_done_rc) {
5049                 release_crq_queue(adapter);
5050                 return adapter->init_done_rc;
5051         }
5052
5053         if (adapter->from_passive_init) {
5054                 adapter->state = VNIC_OPEN;
5055                 adapter->from_passive_init = false;
5056                 return -1;
5057         }
5058
5059         rc = init_sub_crqs(adapter);
5060         if (rc) {
5061                 dev_err(dev, "Initialization of sub crqs failed\n");
5062                 release_crq_queue(adapter);
5063                 return rc;
5064         }
5065
5066         rc = init_sub_crq_irqs(adapter);
5067         if (rc) {
5068                 dev_err(dev, "Failed to initialize sub crq irqs\n");
5069                 release_crq_queue(adapter);
5070         }
5071
5072         return rc;
5073 }
5074
5075 static struct device_attribute dev_attr_failover;
5076
5077 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5078 {
5079         struct ibmvnic_adapter *adapter;
5080         struct net_device *netdev;
5081         unsigned char *mac_addr_p;
5082         int rc;
5083
5084         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5085                 dev->unit_address);
5086
5087         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5088                                                         VETH_MAC_ADDR, NULL);
5089         if (!mac_addr_p) {
5090                 dev_err(&dev->dev,
5091                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5092                         __FILE__, __LINE__);
5093                 return 0;
5094         }
5095
5096         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5097                                    IBMVNIC_MAX_QUEUES);
5098         if (!netdev)
5099                 return -ENOMEM;
5100
5101         adapter = netdev_priv(netdev);
5102         adapter->state = VNIC_PROBING;
5103         dev_set_drvdata(&dev->dev, netdev);
5104         adapter->vdev = dev;
5105         adapter->netdev = netdev;
5106
5107         ether_addr_copy(adapter->mac_addr, mac_addr_p);
5108         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5109         netdev->irq = dev->irq;
5110         netdev->netdev_ops = &ibmvnic_netdev_ops;
5111         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5112         SET_NETDEV_DEV(netdev, &dev->dev);
5113
5114         spin_lock_init(&adapter->stats_lock);
5115
5116         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5117         INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5118                           __ibmvnic_delayed_reset);
5119         INIT_LIST_HEAD(&adapter->rwi_list);
5120         spin_lock_init(&adapter->rwi_lock);
5121         spin_lock_init(&adapter->state_lock);
5122         mutex_init(&adapter->fw_lock);
5123         init_completion(&adapter->init_done);
5124         init_completion(&adapter->fw_done);
5125         init_completion(&adapter->reset_done);
5126         init_completion(&adapter->stats_done);
5127         clear_bit(0, &adapter->resetting);
5128
5129         do {
5130                 rc = init_crq_queue(adapter);
5131                 if (rc) {
5132                         dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5133                                 rc);
5134                         goto ibmvnic_init_fail;
5135                 }
5136
5137                 rc = ibmvnic_init(adapter);
5138                 if (rc && rc != EAGAIN)
5139                         goto ibmvnic_init_fail;
5140         } while (rc == EAGAIN);
5141
5142         rc = init_stats_buffers(adapter);
5143         if (rc)
5144                 goto ibmvnic_init_fail;
5145
5146         rc = init_stats_token(adapter);
5147         if (rc)
5148                 goto ibmvnic_stats_fail;
5149
5150         netdev->mtu = adapter->req_mtu - ETH_HLEN;
5151         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5152         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5153
5154         rc = device_create_file(&dev->dev, &dev_attr_failover);
5155         if (rc)
5156                 goto ibmvnic_dev_file_err;
5157
5158         netif_carrier_off(netdev);
5159         rc = register_netdev(netdev);
5160         if (rc) {
5161                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5162                 goto ibmvnic_register_fail;
5163         }
5164         dev_info(&dev->dev, "ibmvnic registered\n");
5165
5166         adapter->state = VNIC_PROBED;
5167
5168         adapter->wait_for_reset = false;
5169
5170         return 0;
5171
5172 ibmvnic_register_fail:
5173         device_remove_file(&dev->dev, &dev_attr_failover);
5174
5175 ibmvnic_dev_file_err:
5176         release_stats_token(adapter);
5177
5178 ibmvnic_stats_fail:
5179         release_stats_buffers(adapter);
5180
5181 ibmvnic_init_fail:
5182         release_sub_crqs(adapter, 1);
5183         release_crq_queue(adapter);
5184         mutex_destroy(&adapter->fw_lock);
5185         free_netdev(netdev);
5186
5187         return rc;
5188 }
5189
5190 static int ibmvnic_remove(struct vio_dev *dev)
5191 {
5192         struct net_device *netdev = dev_get_drvdata(&dev->dev);
5193         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5194         unsigned long flags;
5195
5196         spin_lock_irqsave(&adapter->state_lock, flags);
5197         if (adapter->state == VNIC_RESETTING) {
5198                 spin_unlock_irqrestore(&adapter->state_lock, flags);
5199                 return -EBUSY;
5200         }
5201
5202         adapter->state = VNIC_REMOVING;
5203         spin_unlock_irqrestore(&adapter->state_lock, flags);
5204
5205         flush_work(&adapter->ibmvnic_reset);
5206         flush_delayed_work(&adapter->ibmvnic_delayed_reset);
5207
5208         rtnl_lock();
5209         unregister_netdevice(netdev);
5210
5211         release_resources(adapter);
5212         release_sub_crqs(adapter, 1);
5213         release_crq_queue(adapter);
5214
5215         release_stats_token(adapter);
5216         release_stats_buffers(adapter);
5217
5218         adapter->state = VNIC_REMOVED;
5219
5220         rtnl_unlock();
5221         mutex_destroy(&adapter->fw_lock);
5222         device_remove_file(&dev->dev, &dev_attr_failover);
5223         free_netdev(netdev);
5224         dev_set_drvdata(&dev->dev, NULL);
5225
5226         return 0;
5227 }
5228
5229 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5230                               const char *buf, size_t count)
5231 {
5232         struct net_device *netdev = dev_get_drvdata(dev);
5233         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5234         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5235         __be64 session_token;
5236         long rc;
5237
5238         if (!sysfs_streq(buf, "1"))
5239                 return -EINVAL;
5240
5241         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5242                          H_GET_SESSION_TOKEN, 0, 0, 0);
5243         if (rc) {
5244                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5245                            rc);
5246                 return -EINVAL;
5247         }
5248
5249         session_token = (__be64)retbuf[0];
5250         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5251                    be64_to_cpu(session_token));
5252         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5253                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5254         if (rc) {
5255                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5256                            rc);
5257                 return -EINVAL;
5258         }
5259
5260         return count;
5261 }
5262
5263 static DEVICE_ATTR_WO(failover);
5264
5265 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5266 {
5267         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5268         struct ibmvnic_adapter *adapter;
5269         struct iommu_table *tbl;
5270         unsigned long ret = 0;
5271         int i;
5272
5273         tbl = get_iommu_table_base(&vdev->dev);
5274
5275         /* netdev inits at probe time along with the structures we need below*/
5276         if (!netdev)
5277                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5278
5279         adapter = netdev_priv(netdev);
5280
5281         ret += PAGE_SIZE; /* the crq message queue */
5282         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5283
5284         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5285                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5286
5287         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
5288              i++)
5289                 ret += adapter->rx_pool[i].size *
5290                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5291
5292         return ret;
5293 }
5294
5295 static int ibmvnic_resume(struct device *dev)
5296 {
5297         struct net_device *netdev = dev_get_drvdata(dev);
5298         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5299
5300         if (adapter->state != VNIC_OPEN)
5301                 return 0;
5302
5303         tasklet_schedule(&adapter->tasklet);
5304
5305         return 0;
5306 }
5307
5308 static const struct vio_device_id ibmvnic_device_table[] = {
5309         {"network", "IBM,vnic"},
5310         {"", "" }
5311 };
5312 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5313
5314 static const struct dev_pm_ops ibmvnic_pm_ops = {
5315         .resume = ibmvnic_resume
5316 };
5317
5318 static struct vio_driver ibmvnic_driver = {
5319         .id_table       = ibmvnic_device_table,
5320         .probe          = ibmvnic_probe,
5321         .remove         = ibmvnic_remove,
5322         .get_desired_dma = ibmvnic_get_desired_dma,
5323         .name           = ibmvnic_driver_name,
5324         .pm             = &ibmvnic_pm_ops,
5325 };
5326
5327 /* module functions */
5328 static int __init ibmvnic_module_init(void)
5329 {
5330         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5331                 IBMVNIC_DRIVER_VERSION);
5332
5333         return vio_register_driver(&ibmvnic_driver);
5334 }
5335
5336 static void __exit ibmvnic_module_exit(void)
5337 {
5338         vio_unregister_driver(&ibmvnic_driver);
5339 }
5340
5341 module_init(ibmvnic_module_init);
5342 module_exit(ibmvnic_module_exit);