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