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         u32 reset_state;
2146         int rc = 0;
2147
2148         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2149
2150         if (test_and_set_bit_lock(0, &adapter->resetting)) {
2151                 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2152                                       IBMVNIC_RESET_DELAY);
2153                 return;
2154         }
2155
2156         reset_state = adapter->state;
2157
2158         rwi = get_next_rwi(adapter);
2159         while (rwi) {
2160                 if (adapter->state == VNIC_REMOVING ||
2161                     adapter->state == VNIC_REMOVED) {
2162                         kfree(rwi);
2163                         rc = EBUSY;
2164                         break;
2165                 }
2166
2167                 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2168                         /* CHANGE_PARAM requestor holds rtnl_lock */
2169                         rc = do_change_param_reset(adapter, rwi, reset_state);
2170                 } else if (adapter->force_reset_recovery) {
2171                         /* Transport event occurred during previous reset */
2172                         if (adapter->wait_for_reset) {
2173                                 /* Previous was CHANGE_PARAM; caller locked */
2174                                 adapter->force_reset_recovery = false;
2175                                 rc = do_hard_reset(adapter, rwi, reset_state);
2176                         } else {
2177                                 rtnl_lock();
2178                                 adapter->force_reset_recovery = false;
2179                                 rc = do_hard_reset(adapter, rwi, reset_state);
2180                                 rtnl_unlock();
2181                         }
2182                 } else {
2183                         rc = do_reset(adapter, rwi, reset_state);
2184                 }
2185                 kfree(rwi);
2186                 if (rc == IBMVNIC_OPEN_FAILED) {
2187                         if (list_empty(&adapter->rwi_list))
2188                                 adapter->state = VNIC_CLOSED;
2189                         else
2190                                 adapter->state = reset_state;
2191                         rc = 0;
2192                 } else if (rc && rc != IBMVNIC_INIT_FAILED &&
2193                     !adapter->force_reset_recovery)
2194                         break;
2195
2196                 rwi = get_next_rwi(adapter);
2197
2198                 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2199                             rwi->reset_reason == VNIC_RESET_MOBILITY))
2200                         adapter->force_reset_recovery = true;
2201         }
2202
2203         if (adapter->wait_for_reset) {
2204                 adapter->reset_done_rc = rc;
2205                 complete(&adapter->reset_done);
2206         }
2207
2208         if (rc) {
2209                 netdev_dbg(adapter->netdev, "Reset failed\n");
2210                 free_all_rwi(adapter);
2211         }
2212
2213         clear_bit_unlock(0, &adapter->resetting);
2214 }
2215
2216 static void __ibmvnic_delayed_reset(struct work_struct *work)
2217 {
2218         struct ibmvnic_adapter *adapter;
2219
2220         adapter = container_of(work, struct ibmvnic_adapter,
2221                                ibmvnic_delayed_reset.work);
2222         __ibmvnic_reset(&adapter->ibmvnic_reset);
2223 }
2224
2225 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2226                          enum ibmvnic_reset_reason reason)
2227 {
2228         struct list_head *entry, *tmp_entry;
2229         struct ibmvnic_rwi *rwi, *tmp;
2230         struct net_device *netdev = adapter->netdev;
2231         unsigned long flags;
2232         int ret;
2233
2234         if (adapter->state == VNIC_REMOVING ||
2235             adapter->state == VNIC_REMOVED ||
2236             adapter->failover_pending) {
2237                 ret = EBUSY;
2238                 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2239                 goto err;
2240         }
2241
2242         if (adapter->state == VNIC_PROBING) {
2243                 netdev_warn(netdev, "Adapter reset during probe\n");
2244                 ret = adapter->init_done_rc = EAGAIN;
2245                 goto err;
2246         }
2247
2248         spin_lock_irqsave(&adapter->rwi_lock, flags);
2249
2250         list_for_each(entry, &adapter->rwi_list) {
2251                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2252                 if (tmp->reset_reason == reason) {
2253                         netdev_dbg(netdev, "Skipping matching reset\n");
2254                         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2255                         ret = EBUSY;
2256                         goto err;
2257                 }
2258         }
2259
2260         rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2261         if (!rwi) {
2262                 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2263                 ibmvnic_close(netdev);
2264                 ret = ENOMEM;
2265                 goto err;
2266         }
2267         /* if we just received a transport event,
2268          * flush reset queue and process this reset
2269          */
2270         if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2271                 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2272                         list_del(entry);
2273         }
2274         rwi->reset_reason = reason;
2275         list_add_tail(&rwi->list, &adapter->rwi_list);
2276         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2277         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2278         schedule_work(&adapter->ibmvnic_reset);
2279
2280         return 0;
2281 err:
2282         return -ret;
2283 }
2284
2285 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2286 {
2287         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2288
2289         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2290 }
2291
2292 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2293                                   struct ibmvnic_rx_buff *rx_buff)
2294 {
2295         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2296
2297         rx_buff->skb = NULL;
2298
2299         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2300         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2301
2302         atomic_dec(&pool->available);
2303 }
2304
2305 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2306 {
2307         struct net_device *netdev = napi->dev;
2308         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2309         int scrq_num = (int)(napi - adapter->napi);
2310         int frames_processed = 0;
2311
2312 restart_poll:
2313         while (frames_processed < budget) {
2314                 struct sk_buff *skb;
2315                 struct ibmvnic_rx_buff *rx_buff;
2316                 union sub_crq *next;
2317                 u32 length;
2318                 u16 offset;
2319                 u8 flags = 0;
2320
2321                 if (unlikely(test_bit(0, &adapter->resetting) &&
2322                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2323                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2324                         napi_complete_done(napi, frames_processed);
2325                         return frames_processed;
2326                 }
2327
2328                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2329                         break;
2330                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2331                 rx_buff =
2332                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2333                                                           rx_comp.correlator);
2334                 /* do error checking */
2335                 if (next->rx_comp.rc) {
2336                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2337                                    be16_to_cpu(next->rx_comp.rc));
2338                         /* free the entry */
2339                         next->rx_comp.first = 0;
2340                         dev_kfree_skb_any(rx_buff->skb);
2341                         remove_buff_from_pool(adapter, rx_buff);
2342                         continue;
2343                 } else if (!rx_buff->skb) {
2344                         /* free the entry */
2345                         next->rx_comp.first = 0;
2346                         remove_buff_from_pool(adapter, rx_buff);
2347                         continue;
2348                 }
2349
2350                 length = be32_to_cpu(next->rx_comp.len);
2351                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2352                 flags = next->rx_comp.flags;
2353                 skb = rx_buff->skb;
2354                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2355                                         length);
2356
2357                 /* VLAN Header has been stripped by the system firmware and
2358                  * needs to be inserted by the driver
2359                  */
2360                 if (adapter->rx_vlan_header_insertion &&
2361                     (flags & IBMVNIC_VLAN_STRIPPED))
2362                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2363                                                ntohs(next->rx_comp.vlan_tci));
2364
2365                 /* free the entry */
2366                 next->rx_comp.first = 0;
2367                 remove_buff_from_pool(adapter, rx_buff);
2368
2369                 skb_put(skb, length);
2370                 skb->protocol = eth_type_trans(skb, netdev);
2371                 skb_record_rx_queue(skb, scrq_num);
2372
2373                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2374                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2375                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2376                 }
2377
2378                 length = skb->len;
2379                 napi_gro_receive(napi, skb); /* send it up */
2380                 netdev->stats.rx_packets++;
2381                 netdev->stats.rx_bytes += length;
2382                 adapter->rx_stats_buffers[scrq_num].packets++;
2383                 adapter->rx_stats_buffers[scrq_num].bytes += length;
2384                 frames_processed++;
2385         }
2386
2387         if (adapter->state != VNIC_CLOSING)
2388                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2389
2390         if (frames_processed < budget) {
2391                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2392                 napi_complete_done(napi, frames_processed);
2393                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2394                     napi_reschedule(napi)) {
2395                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2396                         goto restart_poll;
2397                 }
2398         }
2399         return frames_processed;
2400 }
2401
2402 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2403 {
2404         int rc, ret;
2405
2406         adapter->fallback.mtu = adapter->req_mtu;
2407         adapter->fallback.rx_queues = adapter->req_rx_queues;
2408         adapter->fallback.tx_queues = adapter->req_tx_queues;
2409         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2410         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2411
2412         reinit_completion(&adapter->reset_done);
2413         adapter->wait_for_reset = true;
2414         rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2415
2416         if (rc) {
2417                 ret = rc;
2418                 goto out;
2419         }
2420         rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2421         if (rc) {
2422                 ret = -ENODEV;
2423                 goto out;
2424         }
2425
2426         ret = 0;
2427         if (adapter->reset_done_rc) {
2428                 ret = -EIO;
2429                 adapter->desired.mtu = adapter->fallback.mtu;
2430                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2431                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2432                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2433                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2434
2435                 reinit_completion(&adapter->reset_done);
2436                 adapter->wait_for_reset = true;
2437                 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2438                 if (rc) {
2439                         ret = rc;
2440                         goto out;
2441                 }
2442                 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2443                                                  60000);
2444                 if (rc) {
2445                         ret = -ENODEV;
2446                         goto out;
2447                 }
2448         }
2449 out:
2450         adapter->wait_for_reset = false;
2451
2452         return ret;
2453 }
2454
2455 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2456 {
2457         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2458
2459         adapter->desired.mtu = new_mtu + ETH_HLEN;
2460
2461         return wait_for_reset(adapter);
2462 }
2463
2464 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2465                                                 struct net_device *dev,
2466                                                 netdev_features_t features)
2467 {
2468         /* Some backing hardware adapters can not
2469          * handle packets with a MSS less than 224
2470          * or with only one segment.
2471          */
2472         if (skb_is_gso(skb)) {
2473                 if (skb_shinfo(skb)->gso_size < 224 ||
2474                     skb_shinfo(skb)->gso_segs == 1)
2475                         features &= ~NETIF_F_GSO_MASK;
2476         }
2477
2478         return features;
2479 }
2480
2481 static const struct net_device_ops ibmvnic_netdev_ops = {
2482         .ndo_open               = ibmvnic_open,
2483         .ndo_stop               = ibmvnic_close,
2484         .ndo_start_xmit         = ibmvnic_xmit,
2485         .ndo_set_rx_mode        = ibmvnic_set_multi,
2486         .ndo_set_mac_address    = ibmvnic_set_mac,
2487         .ndo_validate_addr      = eth_validate_addr,
2488         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2489         .ndo_change_mtu         = ibmvnic_change_mtu,
2490         .ndo_features_check     = ibmvnic_features_check,
2491 };
2492
2493 /* ethtool functions */
2494
2495 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2496                                       struct ethtool_link_ksettings *cmd)
2497 {
2498         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2499         int rc;
2500
2501         rc = send_query_phys_parms(adapter);
2502         if (rc) {
2503                 adapter->speed = SPEED_UNKNOWN;
2504                 adapter->duplex = DUPLEX_UNKNOWN;
2505         }
2506         cmd->base.speed = adapter->speed;
2507         cmd->base.duplex = adapter->duplex;
2508         cmd->base.port = PORT_FIBRE;
2509         cmd->base.phy_address = 0;
2510         cmd->base.autoneg = AUTONEG_ENABLE;
2511
2512         return 0;
2513 }
2514
2515 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2516                                 struct ethtool_drvinfo *info)
2517 {
2518         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2519
2520         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2521         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2522         strlcpy(info->fw_version, adapter->fw_version,
2523                 sizeof(info->fw_version));
2524 }
2525
2526 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2527 {
2528         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2529
2530         return adapter->msg_enable;
2531 }
2532
2533 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2534 {
2535         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2536
2537         adapter->msg_enable = data;
2538 }
2539
2540 static u32 ibmvnic_get_link(struct net_device *netdev)
2541 {
2542         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2543
2544         /* Don't need to send a query because we request a logical link up at
2545          * init and then we wait for link state indications
2546          */
2547         return adapter->logical_link_state;
2548 }
2549
2550 static void ibmvnic_get_ringparam(struct net_device *netdev,
2551                                   struct ethtool_ringparam *ring)
2552 {
2553         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2554
2555         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2556                 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2557                 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2558         } else {
2559                 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2560                 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2561         }
2562         ring->rx_mini_max_pending = 0;
2563         ring->rx_jumbo_max_pending = 0;
2564         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2565         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2566         ring->rx_mini_pending = 0;
2567         ring->rx_jumbo_pending = 0;
2568 }
2569
2570 static int ibmvnic_set_ringparam(struct net_device *netdev,
2571                                  struct ethtool_ringparam *ring)
2572 {
2573         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2574         int ret;
2575
2576         ret = 0;
2577         adapter->desired.rx_entries = ring->rx_pending;
2578         adapter->desired.tx_entries = ring->tx_pending;
2579
2580         ret = wait_for_reset(adapter);
2581
2582         if (!ret &&
2583             (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2584              adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2585                 netdev_info(netdev,
2586                             "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2587                             ring->rx_pending, ring->tx_pending,
2588                             adapter->req_rx_add_entries_per_subcrq,
2589                             adapter->req_tx_entries_per_subcrq);
2590         return ret;
2591 }
2592
2593 static void ibmvnic_get_channels(struct net_device *netdev,
2594                                  struct ethtool_channels *channels)
2595 {
2596         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2597
2598         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2599                 channels->max_rx = adapter->max_rx_queues;
2600                 channels->max_tx = adapter->max_tx_queues;
2601         } else {
2602                 channels->max_rx = IBMVNIC_MAX_QUEUES;
2603                 channels->max_tx = IBMVNIC_MAX_QUEUES;
2604         }
2605
2606         channels->max_other = 0;
2607         channels->max_combined = 0;
2608         channels->rx_count = adapter->req_rx_queues;
2609         channels->tx_count = adapter->req_tx_queues;
2610         channels->other_count = 0;
2611         channels->combined_count = 0;
2612 }
2613
2614 static int ibmvnic_set_channels(struct net_device *netdev,
2615                                 struct ethtool_channels *channels)
2616 {
2617         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2618         int ret;
2619
2620         ret = 0;
2621         adapter->desired.rx_queues = channels->rx_count;
2622         adapter->desired.tx_queues = channels->tx_count;
2623
2624         ret = wait_for_reset(adapter);
2625
2626         if (!ret &&
2627             (adapter->req_rx_queues != channels->rx_count ||
2628              adapter->req_tx_queues != channels->tx_count))
2629                 netdev_info(netdev,
2630                             "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2631                             channels->rx_count, channels->tx_count,
2632                             adapter->req_rx_queues, adapter->req_tx_queues);
2633         return ret;
2634
2635 }
2636
2637 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2638 {
2639         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2640         int i;
2641
2642         switch (stringset) {
2643         case ETH_SS_STATS:
2644                 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2645                                 i++, data += ETH_GSTRING_LEN)
2646                         memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2647
2648                 for (i = 0; i < adapter->req_tx_queues; i++) {
2649                         snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2650                         data += ETH_GSTRING_LEN;
2651
2652                         snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2653                         data += ETH_GSTRING_LEN;
2654
2655                         snprintf(data, ETH_GSTRING_LEN,
2656                                  "tx%d_dropped_packets", i);
2657                         data += ETH_GSTRING_LEN;
2658                 }
2659
2660                 for (i = 0; i < adapter->req_rx_queues; i++) {
2661                         snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2662                         data += ETH_GSTRING_LEN;
2663
2664                         snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2665                         data += ETH_GSTRING_LEN;
2666
2667                         snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2668                         data += ETH_GSTRING_LEN;
2669                 }
2670                 break;
2671
2672         case ETH_SS_PRIV_FLAGS:
2673                 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2674                         strcpy(data + i * ETH_GSTRING_LEN,
2675                                ibmvnic_priv_flags[i]);
2676                 break;
2677         default:
2678                 return;
2679         }
2680 }
2681
2682 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2683 {
2684         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2685
2686         switch (sset) {
2687         case ETH_SS_STATS:
2688                 return ARRAY_SIZE(ibmvnic_stats) +
2689                        adapter->req_tx_queues * NUM_TX_STATS +
2690                        adapter->req_rx_queues * NUM_RX_STATS;
2691         case ETH_SS_PRIV_FLAGS:
2692                 return ARRAY_SIZE(ibmvnic_priv_flags);
2693         default:
2694                 return -EOPNOTSUPP;
2695         }
2696 }
2697
2698 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2699                                       struct ethtool_stats *stats, u64 *data)
2700 {
2701         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2702         union ibmvnic_crq crq;
2703         int i, j;
2704         int rc;
2705
2706         memset(&crq, 0, sizeof(crq));
2707         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2708         crq.request_statistics.cmd = REQUEST_STATISTICS;
2709         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2710         crq.request_statistics.len =
2711             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2712
2713         /* Wait for data to be written */
2714         reinit_completion(&adapter->stats_done);
2715         rc = ibmvnic_send_crq(adapter, &crq);
2716         if (rc)
2717                 return;
2718         rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2719         if (rc)
2720                 return;
2721
2722         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2723                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2724                                                 ibmvnic_stats[i].offset));
2725
2726         for (j = 0; j < adapter->req_tx_queues; j++) {
2727                 data[i] = adapter->tx_stats_buffers[j].packets;
2728                 i++;
2729                 data[i] = adapter->tx_stats_buffers[j].bytes;
2730                 i++;
2731                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2732                 i++;
2733         }
2734
2735         for (j = 0; j < adapter->req_rx_queues; j++) {
2736                 data[i] = adapter->rx_stats_buffers[j].packets;
2737                 i++;
2738                 data[i] = adapter->rx_stats_buffers[j].bytes;
2739                 i++;
2740                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2741                 i++;
2742         }
2743 }
2744
2745 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2746 {
2747         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2748
2749         return adapter->priv_flags;
2750 }
2751
2752 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2753 {
2754         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2755         bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2756
2757         if (which_maxes)
2758                 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2759         else
2760                 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2761
2762         return 0;
2763 }
2764 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2765         .get_drvinfo            = ibmvnic_get_drvinfo,
2766         .get_msglevel           = ibmvnic_get_msglevel,
2767         .set_msglevel           = ibmvnic_set_msglevel,
2768         .get_link               = ibmvnic_get_link,
2769         .get_ringparam          = ibmvnic_get_ringparam,
2770         .set_ringparam          = ibmvnic_set_ringparam,
2771         .get_channels           = ibmvnic_get_channels,
2772         .set_channels           = ibmvnic_set_channels,
2773         .get_strings            = ibmvnic_get_strings,
2774         .get_sset_count         = ibmvnic_get_sset_count,
2775         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2776         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2777         .get_priv_flags         = ibmvnic_get_priv_flags,
2778         .set_priv_flags         = ibmvnic_set_priv_flags,
2779 };
2780
2781 /* Routines for managing CRQs/sCRQs  */
2782
2783 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2784                                    struct ibmvnic_sub_crq_queue *scrq)
2785 {
2786         int rc;
2787
2788         if (scrq->irq) {
2789                 free_irq(scrq->irq, scrq);
2790                 irq_dispose_mapping(scrq->irq);
2791                 scrq->irq = 0;
2792         }
2793
2794         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2795         atomic_set(&scrq->used, 0);
2796         scrq->cur = 0;
2797
2798         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2799                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2800         return rc;
2801 }
2802
2803 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2804 {
2805         int i, rc;
2806
2807         for (i = 0; i < adapter->req_tx_queues; i++) {
2808                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2809                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2810                 if (rc)
2811                         return rc;
2812         }
2813
2814         for (i = 0; i < adapter->req_rx_queues; i++) {
2815                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2816                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2817                 if (rc)
2818                         return rc;
2819         }
2820
2821         return rc;
2822 }
2823
2824 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2825                                   struct ibmvnic_sub_crq_queue *scrq,
2826                                   bool do_h_free)
2827 {
2828         struct device *dev = &adapter->vdev->dev;
2829         long rc;
2830
2831         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2832
2833         if (do_h_free) {
2834                 /* Close the sub-crqs */
2835                 do {
2836                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2837                                                 adapter->vdev->unit_address,
2838                                                 scrq->crq_num);
2839                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2840
2841                 if (rc) {
2842                         netdev_err(adapter->netdev,
2843                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2844                                    scrq->crq_num, rc);
2845                 }
2846         }
2847
2848         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2849                          DMA_BIDIRECTIONAL);
2850         free_pages((unsigned long)scrq->msgs, 2);
2851         kfree(scrq);
2852 }
2853
2854 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2855                                                         *adapter)
2856 {
2857         struct device *dev = &adapter->vdev->dev;
2858         struct ibmvnic_sub_crq_queue *scrq;
2859         int rc;
2860
2861         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2862         if (!scrq)
2863                 return NULL;
2864
2865         scrq->msgs =
2866                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2867         if (!scrq->msgs) {
2868                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2869                 goto zero_page_failed;
2870         }
2871
2872         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2873                                          DMA_BIDIRECTIONAL);
2874         if (dma_mapping_error(dev, scrq->msg_token)) {
2875                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2876                 goto map_failed;
2877         }
2878
2879         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2880                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2881
2882         if (rc == H_RESOURCE)
2883                 rc = ibmvnic_reset_crq(adapter);
2884
2885         if (rc == H_CLOSED) {
2886                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2887         } else if (rc) {
2888                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2889                 goto reg_failed;
2890         }
2891
2892         scrq->adapter = adapter;
2893         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2894         spin_lock_init(&scrq->lock);
2895
2896         netdev_dbg(adapter->netdev,
2897                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2898                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2899
2900         return scrq;
2901
2902 reg_failed:
2903         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2904                          DMA_BIDIRECTIONAL);
2905 map_failed:
2906         free_pages((unsigned long)scrq->msgs, 2);
2907 zero_page_failed:
2908         kfree(scrq);
2909
2910         return NULL;
2911 }
2912
2913 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2914 {
2915         int i;
2916
2917         if (adapter->tx_scrq) {
2918                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2919                         if (!adapter->tx_scrq[i])
2920                                 continue;
2921
2922                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2923                                    i);
2924                         if (adapter->tx_scrq[i]->irq) {
2925                                 free_irq(adapter->tx_scrq[i]->irq,
2926                                          adapter->tx_scrq[i]);
2927                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2928                                 adapter->tx_scrq[i]->irq = 0;
2929                         }
2930
2931                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2932                                               do_h_free);
2933                 }
2934
2935                 kfree(adapter->tx_scrq);
2936                 adapter->tx_scrq = NULL;
2937                 adapter->num_active_tx_scrqs = 0;
2938         }
2939
2940         if (adapter->rx_scrq) {
2941                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2942                         if (!adapter->rx_scrq[i])
2943                                 continue;
2944
2945                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2946                                    i);
2947                         if (adapter->rx_scrq[i]->irq) {
2948                                 free_irq(adapter->rx_scrq[i]->irq,
2949                                          adapter->rx_scrq[i]);
2950                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2951                                 adapter->rx_scrq[i]->irq = 0;
2952                         }
2953
2954                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2955                                               do_h_free);
2956                 }
2957
2958                 kfree(adapter->rx_scrq);
2959                 adapter->rx_scrq = NULL;
2960                 adapter->num_active_rx_scrqs = 0;
2961         }
2962 }
2963
2964 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2965                             struct ibmvnic_sub_crq_queue *scrq)
2966 {
2967         struct device *dev = &adapter->vdev->dev;
2968         unsigned long rc;
2969
2970         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2971                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2972         if (rc)
2973                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2974                         scrq->hw_irq, rc);
2975         return rc;
2976 }
2977
2978 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2979                            struct ibmvnic_sub_crq_queue *scrq)
2980 {
2981         struct device *dev = &adapter->vdev->dev;
2982         unsigned long rc;
2983
2984         if (scrq->hw_irq > 0x100000000ULL) {
2985                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2986                 return 1;
2987         }
2988
2989         if (test_bit(0, &adapter->resetting) &&
2990             adapter->reset_reason == VNIC_RESET_MOBILITY) {
2991                 u64 val = (0xff000000) | scrq->hw_irq;
2992
2993                 rc = plpar_hcall_norets(H_EOI, val);
2994                 /* H_EOI would fail with rc = H_FUNCTION when running
2995                  * in XIVE mode which is expected, but not an error.
2996                  */
2997                 if (rc && (rc != H_FUNCTION))
2998                         dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2999                                 val, rc);
3000         }
3001
3002         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3003                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3004         if (rc)
3005                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3006                         scrq->hw_irq, rc);
3007         return rc;
3008 }
3009
3010 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3011                                struct ibmvnic_sub_crq_queue *scrq)
3012 {
3013         struct device *dev = &adapter->vdev->dev;
3014         struct ibmvnic_tx_pool *tx_pool;
3015         struct ibmvnic_tx_buff *txbuff;
3016         union sub_crq *next;
3017         int index;
3018         int i, j;
3019
3020 restart_loop:
3021         while (pending_scrq(adapter, scrq)) {
3022                 unsigned int pool = scrq->pool_index;
3023                 int num_entries = 0;
3024
3025                 next = ibmvnic_next_scrq(adapter, scrq);
3026                 for (i = 0; i < next->tx_comp.num_comps; i++) {
3027                         if (next->tx_comp.rcs[i]) {
3028                                 dev_err(dev, "tx error %x\n",
3029                                         next->tx_comp.rcs[i]);
3030                                 continue;
3031                         }
3032                         index = be32_to_cpu(next->tx_comp.correlators[i]);
3033                         if (index & IBMVNIC_TSO_POOL_MASK) {
3034                                 tx_pool = &adapter->tso_pool[pool];
3035                                 index &= ~IBMVNIC_TSO_POOL_MASK;
3036                         } else {
3037                                 tx_pool = &adapter->tx_pool[pool];
3038                         }
3039
3040                         txbuff = &tx_pool->tx_buff[index];
3041
3042                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
3043                                 if (!txbuff->data_dma[j])
3044                                         continue;
3045
3046                                 txbuff->data_dma[j] = 0;
3047                         }
3048
3049                         if (txbuff->last_frag) {
3050                                 dev_kfree_skb_any(txbuff->skb);
3051                                 txbuff->skb = NULL;
3052                         }
3053
3054                         num_entries += txbuff->num_entries;
3055
3056                         tx_pool->free_map[tx_pool->producer_index] = index;
3057                         tx_pool->producer_index =
3058                                 (tx_pool->producer_index + 1) %
3059                                         tx_pool->num_buffers;
3060                 }
3061                 /* remove tx_comp scrq*/
3062                 next->tx_comp.first = 0;
3063
3064                 if (atomic_sub_return(num_entries, &scrq->used) <=
3065                     (adapter->req_tx_entries_per_subcrq / 2) &&
3066                     __netif_subqueue_stopped(adapter->netdev,
3067                                              scrq->pool_index)) {
3068                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3069                         netdev_dbg(adapter->netdev, "Started queue %d\n",
3070                                    scrq->pool_index);
3071                 }
3072         }
3073
3074         enable_scrq_irq(adapter, scrq);
3075
3076         if (pending_scrq(adapter, scrq)) {
3077                 disable_scrq_irq(adapter, scrq);
3078                 goto restart_loop;
3079         }
3080
3081         return 0;
3082 }
3083
3084 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3085 {
3086         struct ibmvnic_sub_crq_queue *scrq = instance;
3087         struct ibmvnic_adapter *adapter = scrq->adapter;
3088
3089         disable_scrq_irq(adapter, scrq);
3090         ibmvnic_complete_tx(adapter, scrq);
3091
3092         return IRQ_HANDLED;
3093 }
3094
3095 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3096 {
3097         struct ibmvnic_sub_crq_queue *scrq = instance;
3098         struct ibmvnic_adapter *adapter = scrq->adapter;
3099
3100         /* When booting a kdump kernel we can hit pending interrupts
3101          * prior to completing driver initialization.
3102          */
3103         if (unlikely(adapter->state != VNIC_OPEN))
3104                 return IRQ_NONE;
3105
3106         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3107
3108         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3109                 disable_scrq_irq(adapter, scrq);
3110                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3111         }
3112
3113         return IRQ_HANDLED;
3114 }
3115
3116 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3117 {
3118         struct device *dev = &adapter->vdev->dev;
3119         struct ibmvnic_sub_crq_queue *scrq;
3120         int i = 0, j = 0;
3121         int rc = 0;
3122
3123         for (i = 0; i < adapter->req_tx_queues; i++) {
3124                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3125                            i);
3126                 scrq = adapter->tx_scrq[i];
3127                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3128
3129                 if (!scrq->irq) {
3130                         rc = -EINVAL;
3131                         dev_err(dev, "Error mapping irq\n");
3132                         goto req_tx_irq_failed;
3133                 }
3134
3135                 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3136                          adapter->vdev->unit_address, i);
3137                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3138                                  0, scrq->name, scrq);
3139
3140                 if (rc) {
3141                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3142                                 scrq->irq, rc);
3143                         irq_dispose_mapping(scrq->irq);
3144                         goto req_tx_irq_failed;
3145                 }
3146         }
3147
3148         for (i = 0; i < adapter->req_rx_queues; i++) {
3149                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3150                            i);
3151                 scrq = adapter->rx_scrq[i];
3152                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3153                 if (!scrq->irq) {
3154                         rc = -EINVAL;
3155                         dev_err(dev, "Error mapping irq\n");
3156                         goto req_rx_irq_failed;
3157                 }
3158                 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3159                          adapter->vdev->unit_address, i);
3160                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3161                                  0, scrq->name, scrq);
3162                 if (rc) {
3163                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3164                                 scrq->irq, rc);
3165                         irq_dispose_mapping(scrq->irq);
3166                         goto req_rx_irq_failed;
3167                 }
3168         }
3169         return rc;
3170
3171 req_rx_irq_failed:
3172         for (j = 0; j < i; j++) {
3173                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3174                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3175         }
3176         i = adapter->req_tx_queues;
3177 req_tx_irq_failed:
3178         for (j = 0; j < i; j++) {
3179                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3180                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3181         }
3182         release_sub_crqs(adapter, 1);
3183         return rc;
3184 }
3185
3186 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3187 {
3188         struct device *dev = &adapter->vdev->dev;
3189         struct ibmvnic_sub_crq_queue **allqueues;
3190         int registered_queues = 0;
3191         int total_queues;
3192         int more = 0;
3193         int i;
3194
3195         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3196
3197         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3198         if (!allqueues)
3199                 return -1;
3200
3201         for (i = 0; i < total_queues; i++) {
3202                 allqueues[i] = init_sub_crq_queue(adapter);
3203                 if (!allqueues[i]) {
3204                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3205                         break;
3206                 }
3207                 registered_queues++;
3208         }
3209
3210         /* Make sure we were able to register the minimum number of queues */
3211         if (registered_queues <
3212             adapter->min_tx_queues + adapter->min_rx_queues) {
3213                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
3214                 goto tx_failed;
3215         }
3216
3217         /* Distribute the failed allocated queues*/
3218         for (i = 0; i < total_queues - registered_queues + more ; i++) {
3219                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3220                 switch (i % 3) {
3221                 case 0:
3222                         if (adapter->req_rx_queues > adapter->min_rx_queues)
3223                                 adapter->req_rx_queues--;
3224                         else
3225                                 more++;
3226                         break;
3227                 case 1:
3228                         if (adapter->req_tx_queues > adapter->min_tx_queues)
3229                                 adapter->req_tx_queues--;
3230                         else
3231                                 more++;
3232                         break;
3233                 }
3234         }
3235
3236         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3237                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
3238         if (!adapter->tx_scrq)
3239                 goto tx_failed;
3240
3241         for (i = 0; i < adapter->req_tx_queues; i++) {
3242                 adapter->tx_scrq[i] = allqueues[i];
3243                 adapter->tx_scrq[i]->pool_index = i;
3244                 adapter->num_active_tx_scrqs++;
3245         }
3246
3247         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3248                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
3249         if (!adapter->rx_scrq)
3250                 goto rx_failed;
3251
3252         for (i = 0; i < adapter->req_rx_queues; i++) {
3253                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3254                 adapter->rx_scrq[i]->scrq_num = i;
3255                 adapter->num_active_rx_scrqs++;
3256         }
3257
3258         kfree(allqueues);
3259         return 0;
3260
3261 rx_failed:
3262         kfree(adapter->tx_scrq);
3263         adapter->tx_scrq = NULL;
3264 tx_failed:
3265         for (i = 0; i < registered_queues; i++)
3266                 release_sub_crq_queue(adapter, allqueues[i], 1);
3267         kfree(allqueues);
3268         return -1;
3269 }
3270
3271 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3272 {
3273         struct device *dev = &adapter->vdev->dev;
3274         union ibmvnic_crq crq;
3275         int max_entries;
3276
3277         if (!retry) {
3278                 /* Sub-CRQ entries are 32 byte long */
3279                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3280
3281                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3282                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
3283                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3284                         return;
3285                 }
3286
3287                 if (adapter->desired.mtu)
3288                         adapter->req_mtu = adapter->desired.mtu;
3289                 else
3290                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3291
3292                 if (!adapter->desired.tx_entries)
3293                         adapter->desired.tx_entries =
3294                                         adapter->max_tx_entries_per_subcrq;
3295                 if (!adapter->desired.rx_entries)
3296                         adapter->desired.rx_entries =
3297                                         adapter->max_rx_add_entries_per_subcrq;
3298
3299                 max_entries = IBMVNIC_MAX_LTB_SIZE /
3300                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3301
3302                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3303                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3304                         adapter->desired.tx_entries = max_entries;
3305                 }
3306
3307                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3308                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3309                         adapter->desired.rx_entries = max_entries;
3310                 }
3311
3312                 if (adapter->desired.tx_entries)
3313                         adapter->req_tx_entries_per_subcrq =
3314                                         adapter->desired.tx_entries;
3315                 else
3316                         adapter->req_tx_entries_per_subcrq =
3317                                         adapter->max_tx_entries_per_subcrq;
3318
3319                 if (adapter->desired.rx_entries)
3320                         adapter->req_rx_add_entries_per_subcrq =
3321                                         adapter->desired.rx_entries;
3322                 else
3323                         adapter->req_rx_add_entries_per_subcrq =
3324                                         adapter->max_rx_add_entries_per_subcrq;
3325
3326                 if (adapter->desired.tx_queues)
3327                         adapter->req_tx_queues =
3328                                         adapter->desired.tx_queues;
3329                 else
3330                         adapter->req_tx_queues =
3331                                         adapter->opt_tx_comp_sub_queues;
3332
3333                 if (adapter->desired.rx_queues)
3334                         adapter->req_rx_queues =
3335                                         adapter->desired.rx_queues;
3336                 else
3337                         adapter->req_rx_queues =
3338                                         adapter->opt_rx_comp_queues;
3339
3340                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3341         }
3342
3343         memset(&crq, 0, sizeof(crq));
3344         crq.request_capability.first = IBMVNIC_CRQ_CMD;
3345         crq.request_capability.cmd = REQUEST_CAPABILITY;
3346
3347         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3348         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3349         atomic_inc(&adapter->running_cap_crqs);
3350         ibmvnic_send_crq(adapter, &crq);
3351
3352         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3353         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3354         atomic_inc(&adapter->running_cap_crqs);
3355         ibmvnic_send_crq(adapter, &crq);
3356
3357         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3358         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3359         atomic_inc(&adapter->running_cap_crqs);
3360         ibmvnic_send_crq(adapter, &crq);
3361
3362         crq.request_capability.capability =
3363             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3364         crq.request_capability.number =
3365             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3366         atomic_inc(&adapter->running_cap_crqs);
3367         ibmvnic_send_crq(adapter, &crq);
3368
3369         crq.request_capability.capability =
3370             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3371         crq.request_capability.number =
3372             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3373         atomic_inc(&adapter->running_cap_crqs);
3374         ibmvnic_send_crq(adapter, &crq);
3375
3376         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3377         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3378         atomic_inc(&adapter->running_cap_crqs);
3379         ibmvnic_send_crq(adapter, &crq);
3380
3381         if (adapter->netdev->flags & IFF_PROMISC) {
3382                 if (adapter->promisc_supported) {
3383                         crq.request_capability.capability =
3384                             cpu_to_be16(PROMISC_REQUESTED);
3385                         crq.request_capability.number = cpu_to_be64(1);
3386                         atomic_inc(&adapter->running_cap_crqs);
3387                         ibmvnic_send_crq(adapter, &crq);
3388                 }
3389         } else {
3390                 crq.request_capability.capability =
3391                     cpu_to_be16(PROMISC_REQUESTED);
3392                 crq.request_capability.number = cpu_to_be64(0);
3393                 atomic_inc(&adapter->running_cap_crqs);
3394                 ibmvnic_send_crq(adapter, &crq);
3395         }
3396 }
3397
3398 static int pending_scrq(struct ibmvnic_adapter *adapter,
3399                         struct ibmvnic_sub_crq_queue *scrq)
3400 {
3401         union sub_crq *entry = &scrq->msgs[scrq->cur];
3402
3403         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3404                 return 1;
3405         else
3406                 return 0;
3407 }
3408
3409 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3410                                         struct ibmvnic_sub_crq_queue *scrq)
3411 {
3412         union sub_crq *entry;
3413         unsigned long flags;
3414
3415         spin_lock_irqsave(&scrq->lock, flags);
3416         entry = &scrq->msgs[scrq->cur];
3417         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3418                 if (++scrq->cur == scrq->size)
3419                         scrq->cur = 0;
3420         } else {
3421                 entry = NULL;
3422         }
3423         spin_unlock_irqrestore(&scrq->lock, flags);
3424
3425         return entry;
3426 }
3427
3428 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3429 {
3430         struct ibmvnic_crq_queue *queue = &adapter->crq;
3431         union ibmvnic_crq *crq;
3432
3433         crq = &queue->msgs[queue->cur];
3434         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3435                 if (++queue->cur == queue->size)
3436                         queue->cur = 0;
3437         } else {
3438                 crq = NULL;
3439         }
3440
3441         return crq;
3442 }
3443
3444 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3445 {
3446         switch (rc) {
3447         case H_PARAMETER:
3448                 dev_warn_ratelimited(dev,
3449                                      "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3450                                      func, rc);
3451                 break;
3452         case H_CLOSED:
3453                 dev_warn_ratelimited(dev,
3454                                      "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3455                                      func, rc);
3456                 break;
3457         default:
3458                 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3459                 break;
3460         }
3461 }
3462
3463 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3464                        union sub_crq *sub_crq)
3465 {
3466         unsigned int ua = adapter->vdev->unit_address;
3467         struct device *dev = &adapter->vdev->dev;
3468         u64 *u64_crq = (u64 *)sub_crq;
3469         int rc;
3470
3471         netdev_dbg(adapter->netdev,
3472                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3473                    (unsigned long int)cpu_to_be64(remote_handle),
3474                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3475                    (unsigned long int)cpu_to_be64(u64_crq[1]),
3476                    (unsigned long int)cpu_to_be64(u64_crq[2]),
3477                    (unsigned long int)cpu_to_be64(u64_crq[3]));
3478
3479         /* Make sure the hypervisor sees the complete request */
3480         mb();
3481
3482         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3483                                 cpu_to_be64(remote_handle),
3484                                 cpu_to_be64(u64_crq[0]),
3485                                 cpu_to_be64(u64_crq[1]),
3486                                 cpu_to_be64(u64_crq[2]),
3487                                 cpu_to_be64(u64_crq[3]));
3488
3489         if (rc)
3490                 print_subcrq_error(dev, rc, __func__);
3491
3492         return rc;
3493 }
3494
3495 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3496                                 u64 remote_handle, u64 ioba, u64 num_entries)
3497 {
3498         unsigned int ua = adapter->vdev->unit_address;
3499         struct device *dev = &adapter->vdev->dev;
3500         int rc;
3501
3502         /* Make sure the hypervisor sees the complete request */
3503         mb();
3504         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3505                                 cpu_to_be64(remote_handle),
3506                                 ioba, num_entries);
3507
3508         if (rc)
3509                 print_subcrq_error(dev, rc, __func__);
3510
3511         return rc;
3512 }
3513
3514 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3515                             union ibmvnic_crq *crq)
3516 {
3517         unsigned int ua = adapter->vdev->unit_address;
3518         struct device *dev = &adapter->vdev->dev;
3519         u64 *u64_crq = (u64 *)crq;
3520         int rc;
3521
3522         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3523                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3524                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3525
3526         if (!adapter->crq.active &&
3527             crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3528                 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3529                 return -EINVAL;
3530         }
3531
3532         /* Make sure the hypervisor sees the complete request */
3533         mb();
3534
3535         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3536                                 cpu_to_be64(u64_crq[0]),
3537                                 cpu_to_be64(u64_crq[1]));
3538
3539         if (rc) {
3540                 if (rc == H_CLOSED) {
3541                         dev_warn(dev, "CRQ Queue closed\n");
3542                         if (test_bit(0, &adapter->resetting))
3543                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3544                 }
3545
3546                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3547         }
3548
3549         return rc;
3550 }
3551
3552 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3553 {
3554         union ibmvnic_crq crq;
3555
3556         memset(&crq, 0, sizeof(crq));
3557         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3558         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3559         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3560
3561         return ibmvnic_send_crq(adapter, &crq);
3562 }
3563
3564 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3565 {
3566         union ibmvnic_crq crq;
3567
3568         memset(&crq, 0, sizeof(crq));
3569         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3570         crq.version_exchange.cmd = VERSION_EXCHANGE;
3571         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3572
3573         return ibmvnic_send_crq(adapter, &crq);
3574 }
3575
3576 struct vnic_login_client_data {
3577         u8      type;
3578         __be16  len;
3579         char    name[];
3580 } __packed;
3581
3582 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3583 {
3584         int len;
3585
3586         /* Calculate the amount of buffer space needed for the
3587          * vnic client data in the login buffer. There are four entries,
3588          * OS name, LPAR name, device name, and a null last entry.
3589          */
3590         len = 4 * sizeof(struct vnic_login_client_data);
3591         len += 6; /* "Linux" plus NULL */
3592         len += strlen(utsname()->nodename) + 1;
3593         len += strlen(adapter->netdev->name) + 1;
3594
3595         return len;
3596 }
3597
3598 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3599                                  struct vnic_login_client_data *vlcd)
3600 {
3601         const char *os_name = "Linux";
3602         int len;
3603
3604         /* Type 1 - LPAR OS */
3605         vlcd->type = 1;
3606         len = strlen(os_name) + 1;
3607         vlcd->len = cpu_to_be16(len);
3608         strncpy(vlcd->name, os_name, len);
3609         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3610
3611         /* Type 2 - LPAR name */
3612         vlcd->type = 2;
3613         len = strlen(utsname()->nodename) + 1;
3614         vlcd->len = cpu_to_be16(len);
3615         strncpy(vlcd->name, utsname()->nodename, len);
3616         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3617
3618         /* Type 3 - device name */
3619         vlcd->type = 3;
3620         len = strlen(adapter->netdev->name) + 1;
3621         vlcd->len = cpu_to_be16(len);
3622         strncpy(vlcd->name, adapter->netdev->name, len);
3623 }
3624
3625 static int send_login(struct ibmvnic_adapter *adapter)
3626 {
3627         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3628         struct ibmvnic_login_buffer *login_buffer;
3629         struct device *dev = &adapter->vdev->dev;
3630         dma_addr_t rsp_buffer_token;
3631         dma_addr_t buffer_token;
3632         size_t rsp_buffer_size;
3633         union ibmvnic_crq crq;
3634         size_t buffer_size;
3635         __be64 *tx_list_p;
3636         __be64 *rx_list_p;
3637         int client_data_len;
3638         struct vnic_login_client_data *vlcd;
3639         int i;
3640
3641         if (!adapter->tx_scrq || !adapter->rx_scrq) {
3642                 netdev_err(adapter->netdev,
3643                            "RX or TX queues are not allocated, device login failed\n");
3644                 return -1;
3645         }
3646
3647         release_login_rsp_buffer(adapter);
3648         client_data_len = vnic_client_data_len(adapter);
3649
3650         buffer_size =
3651             sizeof(struct ibmvnic_login_buffer) +
3652             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3653             client_data_len;
3654
3655         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3656         if (!login_buffer)
3657                 goto buf_alloc_failed;
3658
3659         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3660                                       DMA_TO_DEVICE);
3661         if (dma_mapping_error(dev, buffer_token)) {
3662                 dev_err(dev, "Couldn't map login buffer\n");
3663                 goto buf_map_failed;
3664         }
3665
3666         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3667                           sizeof(u64) * adapter->req_tx_queues +
3668                           sizeof(u64) * adapter->req_rx_queues +
3669                           sizeof(u64) * adapter->req_rx_queues +
3670                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3671
3672         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3673         if (!login_rsp_buffer)
3674                 goto buf_rsp_alloc_failed;
3675
3676         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3677                                           rsp_buffer_size, DMA_FROM_DEVICE);
3678         if (dma_mapping_error(dev, rsp_buffer_token)) {
3679                 dev_err(dev, "Couldn't map login rsp buffer\n");
3680                 goto buf_rsp_map_failed;
3681         }
3682
3683         adapter->login_buf = login_buffer;
3684         adapter->login_buf_token = buffer_token;
3685         adapter->login_buf_sz = buffer_size;
3686         adapter->login_rsp_buf = login_rsp_buffer;
3687         adapter->login_rsp_buf_token = rsp_buffer_token;
3688         adapter->login_rsp_buf_sz = rsp_buffer_size;
3689
3690         login_buffer->len = cpu_to_be32(buffer_size);
3691         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3692         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3693         login_buffer->off_txcomp_subcrqs =
3694             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3695         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3696         login_buffer->off_rxcomp_subcrqs =
3697             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3698                         sizeof(u64) * adapter->req_tx_queues);
3699         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3700         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3701
3702         tx_list_p = (__be64 *)((char *)login_buffer +
3703                                       sizeof(struct ibmvnic_login_buffer));
3704         rx_list_p = (__be64 *)((char *)login_buffer +
3705                                       sizeof(struct ibmvnic_login_buffer) +
3706                                       sizeof(u64) * adapter->req_tx_queues);
3707
3708         for (i = 0; i < adapter->req_tx_queues; i++) {
3709                 if (adapter->tx_scrq[i]) {
3710                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3711                                                    crq_num);
3712                 }
3713         }
3714
3715         for (i = 0; i < adapter->req_rx_queues; i++) {
3716                 if (adapter->rx_scrq[i]) {
3717                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3718                                                    crq_num);
3719                 }
3720         }
3721
3722         /* Insert vNIC login client data */
3723         vlcd = (struct vnic_login_client_data *)
3724                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3725         login_buffer->client_data_offset =
3726                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3727         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3728
3729         vnic_add_client_data(adapter, vlcd);
3730
3731         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3732         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3733                 netdev_dbg(adapter->netdev, "%016lx\n",
3734                            ((unsigned long int *)(adapter->login_buf))[i]);
3735         }
3736
3737         memset(&crq, 0, sizeof(crq));
3738         crq.login.first = IBMVNIC_CRQ_CMD;
3739         crq.login.cmd = LOGIN;
3740         crq.login.ioba = cpu_to_be32(buffer_token);
3741         crq.login.len = cpu_to_be32(buffer_size);
3742         ibmvnic_send_crq(adapter, &crq);
3743
3744         return 0;
3745
3746 buf_rsp_map_failed:
3747         kfree(login_rsp_buffer);
3748 buf_rsp_alloc_failed:
3749         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3750 buf_map_failed:
3751         kfree(login_buffer);
3752 buf_alloc_failed:
3753         return -1;
3754 }
3755
3756 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3757                             u32 len, u8 map_id)
3758 {
3759         union ibmvnic_crq crq;
3760
3761         memset(&crq, 0, sizeof(crq));
3762         crq.request_map.first = IBMVNIC_CRQ_CMD;
3763         crq.request_map.cmd = REQUEST_MAP;
3764         crq.request_map.map_id = map_id;
3765         crq.request_map.ioba = cpu_to_be32(addr);
3766         crq.request_map.len = cpu_to_be32(len);
3767         return ibmvnic_send_crq(adapter, &crq);
3768 }
3769
3770 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3771 {
3772         union ibmvnic_crq crq;
3773
3774         memset(&crq, 0, sizeof(crq));
3775         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3776         crq.request_unmap.cmd = REQUEST_UNMAP;
3777         crq.request_unmap.map_id = map_id;
3778         return ibmvnic_send_crq(adapter, &crq);
3779 }
3780
3781 static void send_map_query(struct ibmvnic_adapter *adapter)
3782 {
3783         union ibmvnic_crq crq;
3784
3785         memset(&crq, 0, sizeof(crq));
3786         crq.query_map.first = IBMVNIC_CRQ_CMD;
3787         crq.query_map.cmd = QUERY_MAP;
3788         ibmvnic_send_crq(adapter, &crq);
3789 }
3790
3791 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3792 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3793 {
3794         union ibmvnic_crq crq;
3795
3796         atomic_set(&adapter->running_cap_crqs, 0);
3797         memset(&crq, 0, sizeof(crq));
3798         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3799         crq.query_capability.cmd = QUERY_CAPABILITY;
3800
3801         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3802         atomic_inc(&adapter->running_cap_crqs);
3803         ibmvnic_send_crq(adapter, &crq);
3804
3805         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3806         atomic_inc(&adapter->running_cap_crqs);
3807         ibmvnic_send_crq(adapter, &crq);
3808
3809         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3810         atomic_inc(&adapter->running_cap_crqs);
3811         ibmvnic_send_crq(adapter, &crq);
3812
3813         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3814         atomic_inc(&adapter->running_cap_crqs);
3815         ibmvnic_send_crq(adapter, &crq);
3816
3817         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3818         atomic_inc(&adapter->running_cap_crqs);
3819         ibmvnic_send_crq(adapter, &crq);
3820
3821         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3822         atomic_inc(&adapter->running_cap_crqs);
3823         ibmvnic_send_crq(adapter, &crq);
3824
3825         crq.query_capability.capability =
3826             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3827         atomic_inc(&adapter->running_cap_crqs);
3828         ibmvnic_send_crq(adapter, &crq);
3829
3830         crq.query_capability.capability =
3831             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3832         atomic_inc(&adapter->running_cap_crqs);
3833         ibmvnic_send_crq(adapter, &crq);
3834
3835         crq.query_capability.capability =
3836             cpu_to_be16(MAX_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(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3842         atomic_inc(&adapter->running_cap_crqs);
3843         ibmvnic_send_crq(adapter, &crq);
3844
3845         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3846         atomic_inc(&adapter->running_cap_crqs);
3847         ibmvnic_send_crq(adapter, &crq);
3848
3849         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3850         atomic_inc(&adapter->running_cap_crqs);
3851         ibmvnic_send_crq(adapter, &crq);
3852
3853         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3854         atomic_inc(&adapter->running_cap_crqs);
3855         ibmvnic_send_crq(adapter, &crq);
3856
3857         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3858         atomic_inc(&adapter->running_cap_crqs);
3859         ibmvnic_send_crq(adapter, &crq);
3860
3861         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3862         atomic_inc(&adapter->running_cap_crqs);
3863         ibmvnic_send_crq(adapter, &crq);
3864
3865         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3866         atomic_inc(&adapter->running_cap_crqs);
3867         ibmvnic_send_crq(adapter, &crq);
3868
3869         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3870         atomic_inc(&adapter->running_cap_crqs);
3871         ibmvnic_send_crq(adapter, &crq);
3872
3873         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3874         atomic_inc(&adapter->running_cap_crqs);
3875         ibmvnic_send_crq(adapter, &crq);
3876
3877         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3878         atomic_inc(&adapter->running_cap_crqs);
3879         ibmvnic_send_crq(adapter, &crq);
3880
3881         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3882         atomic_inc(&adapter->running_cap_crqs);
3883         ibmvnic_send_crq(adapter, &crq);
3884
3885         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3886         atomic_inc(&adapter->running_cap_crqs);
3887         ibmvnic_send_crq(adapter, &crq);
3888
3889         crq.query_capability.capability =
3890                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3891         atomic_inc(&adapter->running_cap_crqs);
3892         ibmvnic_send_crq(adapter, &crq);
3893
3894         crq.query_capability.capability =
3895                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3896         atomic_inc(&adapter->running_cap_crqs);
3897         ibmvnic_send_crq(adapter, &crq);
3898
3899         crq.query_capability.capability =
3900                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3901         atomic_inc(&adapter->running_cap_crqs);
3902         ibmvnic_send_crq(adapter, &crq);
3903
3904         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3905         atomic_inc(&adapter->running_cap_crqs);
3906         ibmvnic_send_crq(adapter, &crq);
3907 }
3908
3909 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3910                                 struct ibmvnic_adapter *adapter)
3911 {
3912         struct device *dev = &adapter->vdev->dev;
3913
3914         if (crq->get_vpd_size_rsp.rc.code) {
3915                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3916                         crq->get_vpd_size_rsp.rc.code);
3917                 complete(&adapter->fw_done);
3918                 return;
3919         }
3920
3921         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3922         complete(&adapter->fw_done);
3923 }
3924
3925 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3926                            struct ibmvnic_adapter *adapter)
3927 {
3928         struct device *dev = &adapter->vdev->dev;
3929         unsigned char *substr = NULL;
3930         u8 fw_level_len = 0;
3931
3932         memset(adapter->fw_version, 0, 32);
3933
3934         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3935                          DMA_FROM_DEVICE);
3936
3937         if (crq->get_vpd_rsp.rc.code) {
3938                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3939                         crq->get_vpd_rsp.rc.code);
3940                 goto complete;
3941         }
3942
3943         /* get the position of the firmware version info
3944          * located after the ASCII 'RM' substring in the buffer
3945          */
3946         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3947         if (!substr) {
3948                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3949                 goto complete;
3950         }
3951
3952         /* get length of firmware level ASCII substring */
3953         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3954                 fw_level_len = *(substr + 2);
3955         } else {
3956                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3957                 goto complete;
3958         }
3959
3960         /* copy firmware version string from vpd into adapter */
3961         if ((substr + 3 + fw_level_len) <
3962             (adapter->vpd->buff + adapter->vpd->len)) {
3963                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3964         } else {
3965                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3966         }
3967
3968 complete:
3969         if (adapter->fw_version[0] == '\0')
3970                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3971         complete(&adapter->fw_done);
3972 }
3973
3974 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3975 {
3976         struct device *dev = &adapter->vdev->dev;
3977         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3978         netdev_features_t old_hw_features = 0;
3979         union ibmvnic_crq crq;
3980         int i;
3981
3982         dma_unmap_single(dev, adapter->ip_offload_tok,
3983                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3984
3985         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3986         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3987                 netdev_dbg(adapter->netdev, "%016lx\n",
3988                            ((unsigned long int *)(buf))[i]);
3989
3990         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3991         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3992         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3993                    buf->tcp_ipv4_chksum);
3994         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3995                    buf->tcp_ipv6_chksum);
3996         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3997                    buf->udp_ipv4_chksum);
3998         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3999                    buf->udp_ipv6_chksum);
4000         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4001                    buf->large_tx_ipv4);
4002         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4003                    buf->large_tx_ipv6);
4004         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4005                    buf->large_rx_ipv4);
4006         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4007                    buf->large_rx_ipv6);
4008         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4009                    buf->max_ipv4_header_size);
4010         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4011                    buf->max_ipv6_header_size);
4012         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4013                    buf->max_tcp_header_size);
4014         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4015                    buf->max_udp_header_size);
4016         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4017                    buf->max_large_tx_size);
4018         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4019                    buf->max_large_rx_size);
4020         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4021                    buf->ipv6_extension_header);
4022         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4023                    buf->tcp_pseudosum_req);
4024         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4025                    buf->num_ipv6_ext_headers);
4026         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4027                    buf->off_ipv6_ext_headers);
4028
4029         adapter->ip_offload_ctrl_tok =
4030             dma_map_single(dev, &adapter->ip_offload_ctrl,
4031                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
4032
4033         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
4034                 dev_err(dev, "Couldn't map ip offload control buffer\n");
4035                 return;
4036         }
4037
4038         adapter->ip_offload_ctrl.len =
4039             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4040         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
4041         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
4042         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
4043         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4044         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
4045         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4046         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
4047         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
4048         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
4049
4050         /* large_rx disabled for now, additional features needed */
4051         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
4052         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
4053
4054         if (adapter->state != VNIC_PROBING) {
4055                 old_hw_features = adapter->netdev->hw_features;
4056                 adapter->netdev->hw_features = 0;
4057         }
4058
4059         adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4060
4061         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4062                 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4063
4064         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4065                 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4066
4067         if ((adapter->netdev->features &
4068             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4069                 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4070
4071         if (buf->large_tx_ipv4)
4072                 adapter->netdev->hw_features |= NETIF_F_TSO;
4073         if (buf->large_tx_ipv6)
4074                 adapter->netdev->hw_features |= NETIF_F_TSO6;
4075
4076         if (adapter->state == VNIC_PROBING) {
4077                 adapter->netdev->features |= adapter->netdev->hw_features;
4078         } else if (old_hw_features != adapter->netdev->hw_features) {
4079                 netdev_features_t tmp = 0;
4080
4081                 /* disable features no longer supported */
4082                 adapter->netdev->features &= adapter->netdev->hw_features;
4083                 /* turn on features now supported if previously enabled */
4084                 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4085                         adapter->netdev->hw_features;
4086                 adapter->netdev->features |=
4087                                 tmp & adapter->netdev->wanted_features;
4088         }
4089
4090         memset(&crq, 0, sizeof(crq));
4091         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4092         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4093         crq.control_ip_offload.len =
4094             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4095         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4096         ibmvnic_send_crq(adapter, &crq);
4097 }
4098
4099 static const char *ibmvnic_fw_err_cause(u16 cause)
4100 {
4101         switch (cause) {
4102         case ADAPTER_PROBLEM:
4103                 return "adapter problem";
4104         case BUS_PROBLEM:
4105                 return "bus problem";
4106         case FW_PROBLEM:
4107                 return "firmware problem";
4108         case DD_PROBLEM:
4109                 return "device driver problem";
4110         case EEH_RECOVERY:
4111                 return "EEH recovery";
4112         case FW_UPDATED:
4113                 return "firmware updated";
4114         case LOW_MEMORY:
4115                 return "low Memory";
4116         default:
4117                 return "unknown";
4118         }
4119 }
4120
4121 static void handle_error_indication(union ibmvnic_crq *crq,
4122                                     struct ibmvnic_adapter *adapter)
4123 {
4124         struct device *dev = &adapter->vdev->dev;
4125         u16 cause;
4126
4127         cause = be16_to_cpu(crq->error_indication.error_cause);
4128
4129         dev_warn_ratelimited(dev,
4130                              "Firmware reports %serror, cause: %s. Starting recovery...\n",
4131                              crq->error_indication.flags
4132                                 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4133                              ibmvnic_fw_err_cause(cause));
4134
4135         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4136                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4137         else
4138                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4139 }
4140
4141 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4142                                  struct ibmvnic_adapter *adapter)
4143 {
4144         struct net_device *netdev = adapter->netdev;
4145         struct device *dev = &adapter->vdev->dev;
4146         long rc;
4147
4148         rc = crq->change_mac_addr_rsp.rc.code;
4149         if (rc) {
4150                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4151                 goto out;
4152         }
4153         ether_addr_copy(netdev->dev_addr,
4154                         &crq->change_mac_addr_rsp.mac_addr[0]);
4155 out:
4156         complete(&adapter->fw_done);
4157         return rc;
4158 }
4159
4160 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4161                                    struct ibmvnic_adapter *adapter)
4162 {
4163         struct device *dev = &adapter->vdev->dev;
4164         u64 *req_value;
4165         char *name;
4166
4167         atomic_dec(&adapter->running_cap_crqs);
4168         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4169         case REQ_TX_QUEUES:
4170                 req_value = &adapter->req_tx_queues;
4171                 name = "tx";
4172                 break;
4173         case REQ_RX_QUEUES:
4174                 req_value = &adapter->req_rx_queues;
4175                 name = "rx";
4176                 break;
4177         case REQ_RX_ADD_QUEUES:
4178                 req_value = &adapter->req_rx_add_queues;
4179                 name = "rx_add";
4180                 break;
4181         case REQ_TX_ENTRIES_PER_SUBCRQ:
4182                 req_value = &adapter->req_tx_entries_per_subcrq;
4183                 name = "tx_entries_per_subcrq";
4184                 break;
4185         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4186                 req_value = &adapter->req_rx_add_entries_per_subcrq;
4187                 name = "rx_add_entries_per_subcrq";
4188                 break;
4189         case REQ_MTU:
4190                 req_value = &adapter->req_mtu;
4191                 name = "mtu";
4192                 break;
4193         case PROMISC_REQUESTED:
4194                 req_value = &adapter->promisc;
4195                 name = "promisc";
4196                 break;
4197         default:
4198                 dev_err(dev, "Got invalid cap request rsp %d\n",
4199                         crq->request_capability.capability);
4200                 return;
4201         }
4202
4203         switch (crq->request_capability_rsp.rc.code) {
4204         case SUCCESS:
4205                 break;
4206         case PARTIALSUCCESS:
4207                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4208                          *req_value,
4209                          (long int)be64_to_cpu(crq->request_capability_rsp.
4210                                                number), name);
4211
4212                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4213                     REQ_MTU) {
4214                         pr_err("mtu of %llu is not supported. Reverting.\n",
4215                                *req_value);
4216                         *req_value = adapter->fallback.mtu;
4217                 } else {
4218                         *req_value =
4219                                 be64_to_cpu(crq->request_capability_rsp.number);
4220                 }
4221
4222                 ibmvnic_send_req_caps(adapter, 1);
4223                 return;
4224         default:
4225                 dev_err(dev, "Error %d in request cap rsp\n",
4226                         crq->request_capability_rsp.rc.code);
4227                 return;
4228         }
4229
4230         /* Done receiving requested capabilities, query IP offload support */
4231         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4232                 union ibmvnic_crq newcrq;
4233                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
4234                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
4235                     &adapter->ip_offload_buf;
4236
4237                 adapter->wait_capability = false;
4238                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
4239                                                          buf_sz,
4240                                                          DMA_FROM_DEVICE);
4241
4242                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
4243                         if (!firmware_has_feature(FW_FEATURE_CMO))
4244                                 dev_err(dev, "Couldn't map offload buffer\n");
4245                         return;
4246                 }
4247
4248                 memset(&newcrq, 0, sizeof(newcrq));
4249                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
4250                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
4251                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
4252                 newcrq.query_ip_offload.ioba =
4253                     cpu_to_be32(adapter->ip_offload_tok);
4254
4255                 ibmvnic_send_crq(adapter, &newcrq);
4256         }
4257 }
4258
4259 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4260                             struct ibmvnic_adapter *adapter)
4261 {
4262         struct device *dev = &adapter->vdev->dev;
4263         struct net_device *netdev = adapter->netdev;
4264         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4265         struct ibmvnic_login_buffer *login = adapter->login_buf;
4266         int i;
4267
4268         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4269                          DMA_TO_DEVICE);
4270         dma_unmap_single(dev, adapter->login_rsp_buf_token,
4271                          adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4272
4273         /* If the number of queues requested can't be allocated by the
4274          * server, the login response will return with code 1. We will need
4275          * to resend the login buffer with fewer queues requested.
4276          */
4277         if (login_rsp_crq->generic.rc.code) {
4278                 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4279                 complete(&adapter->init_done);
4280                 return 0;
4281         }
4282
4283         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4284
4285         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4286         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4287                 netdev_dbg(adapter->netdev, "%016lx\n",
4288                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4289         }
4290
4291         /* Sanity checks */
4292         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4293             (be32_to_cpu(login->num_rxcomp_subcrqs) *
4294              adapter->req_rx_add_queues !=
4295              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4296                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4297                 ibmvnic_remove(adapter->vdev);
4298                 return -EIO;
4299         }
4300         release_login_buffer(adapter);
4301         complete(&adapter->init_done);
4302
4303         return 0;
4304 }
4305
4306 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4307                                      struct ibmvnic_adapter *adapter)
4308 {
4309         struct device *dev = &adapter->vdev->dev;
4310         long rc;
4311
4312         rc = crq->request_unmap_rsp.rc.code;
4313         if (rc)
4314                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4315 }
4316
4317 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4318                                  struct ibmvnic_adapter *adapter)
4319 {
4320         struct net_device *netdev = adapter->netdev;
4321         struct device *dev = &adapter->vdev->dev;
4322         long rc;
4323
4324         rc = crq->query_map_rsp.rc.code;
4325         if (rc) {
4326                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4327                 return;
4328         }
4329         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4330                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4331                    crq->query_map_rsp.free_pages);
4332 }
4333
4334 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4335                                  struct ibmvnic_adapter *adapter)
4336 {
4337         struct net_device *netdev = adapter->netdev;
4338         struct device *dev = &adapter->vdev->dev;
4339         long rc;
4340
4341         atomic_dec(&adapter->running_cap_crqs);
4342         netdev_dbg(netdev, "Outstanding queries: %d\n",
4343                    atomic_read(&adapter->running_cap_crqs));
4344         rc = crq->query_capability.rc.code;
4345         if (rc) {
4346                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4347                 goto out;
4348         }
4349
4350         switch (be16_to_cpu(crq->query_capability.capability)) {
4351         case MIN_TX_QUEUES:
4352                 adapter->min_tx_queues =
4353                     be64_to_cpu(crq->query_capability.number);
4354                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4355                            adapter->min_tx_queues);
4356                 break;
4357         case MIN_RX_QUEUES:
4358                 adapter->min_rx_queues =
4359                     be64_to_cpu(crq->query_capability.number);
4360                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4361                            adapter->min_rx_queues);
4362                 break;
4363         case MIN_RX_ADD_QUEUES:
4364                 adapter->min_rx_add_queues =
4365                     be64_to_cpu(crq->query_capability.number);
4366                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4367                            adapter->min_rx_add_queues);
4368                 break;
4369         case MAX_TX_QUEUES:
4370                 adapter->max_tx_queues =
4371                     be64_to_cpu(crq->query_capability.number);
4372                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4373                            adapter->max_tx_queues);
4374                 break;
4375         case MAX_RX_QUEUES:
4376                 adapter->max_rx_queues =
4377                     be64_to_cpu(crq->query_capability.number);
4378                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4379                            adapter->max_rx_queues);
4380                 break;
4381         case MAX_RX_ADD_QUEUES:
4382                 adapter->max_rx_add_queues =
4383                     be64_to_cpu(crq->query_capability.number);
4384                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4385                            adapter->max_rx_add_queues);
4386                 break;
4387         case MIN_TX_ENTRIES_PER_SUBCRQ:
4388                 adapter->min_tx_entries_per_subcrq =
4389                     be64_to_cpu(crq->query_capability.number);
4390                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4391                            adapter->min_tx_entries_per_subcrq);
4392                 break;
4393         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4394                 adapter->min_rx_add_entries_per_subcrq =
4395                     be64_to_cpu(crq->query_capability.number);
4396                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4397                            adapter->min_rx_add_entries_per_subcrq);
4398                 break;
4399         case MAX_TX_ENTRIES_PER_SUBCRQ:
4400                 adapter->max_tx_entries_per_subcrq =
4401                     be64_to_cpu(crq->query_capability.number);
4402                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4403                            adapter->max_tx_entries_per_subcrq);
4404                 break;
4405         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4406                 adapter->max_rx_add_entries_per_subcrq =
4407                     be64_to_cpu(crq->query_capability.number);
4408                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4409                            adapter->max_rx_add_entries_per_subcrq);
4410                 break;
4411         case TCP_IP_OFFLOAD:
4412                 adapter->tcp_ip_offload =
4413                     be64_to_cpu(crq->query_capability.number);
4414                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4415                            adapter->tcp_ip_offload);
4416                 break;
4417         case PROMISC_SUPPORTED:
4418                 adapter->promisc_supported =
4419                     be64_to_cpu(crq->query_capability.number);
4420                 netdev_dbg(netdev, "promisc_supported = %lld\n",
4421                            adapter->promisc_supported);
4422                 break;
4423         case MIN_MTU:
4424                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4425                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4426                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4427                 break;
4428         case MAX_MTU:
4429                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4430                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4431                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4432                 break;
4433         case MAX_MULTICAST_FILTERS:
4434                 adapter->max_multicast_filters =
4435                     be64_to_cpu(crq->query_capability.number);
4436                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4437                            adapter->max_multicast_filters);
4438                 break;
4439         case VLAN_HEADER_INSERTION:
4440                 adapter->vlan_header_insertion =
4441                     be64_to_cpu(crq->query_capability.number);
4442                 if (adapter->vlan_header_insertion)
4443                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4444                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4445                            adapter->vlan_header_insertion);
4446                 break;
4447         case RX_VLAN_HEADER_INSERTION:
4448                 adapter->rx_vlan_header_insertion =
4449                     be64_to_cpu(crq->query_capability.number);
4450                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4451                            adapter->rx_vlan_header_insertion);
4452                 break;
4453         case MAX_TX_SG_ENTRIES:
4454                 adapter->max_tx_sg_entries =
4455                     be64_to_cpu(crq->query_capability.number);
4456                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4457                            adapter->max_tx_sg_entries);
4458                 break;
4459         case RX_SG_SUPPORTED:
4460                 adapter->rx_sg_supported =
4461                     be64_to_cpu(crq->query_capability.number);
4462                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4463                            adapter->rx_sg_supported);
4464                 break;
4465         case OPT_TX_COMP_SUB_QUEUES:
4466                 adapter->opt_tx_comp_sub_queues =
4467                     be64_to_cpu(crq->query_capability.number);
4468                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4469                            adapter->opt_tx_comp_sub_queues);
4470                 break;
4471         case OPT_RX_COMP_QUEUES:
4472                 adapter->opt_rx_comp_queues =
4473                     be64_to_cpu(crq->query_capability.number);
4474                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4475                            adapter->opt_rx_comp_queues);
4476                 break;
4477         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4478                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4479                     be64_to_cpu(crq->query_capability.number);
4480                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4481                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4482                 break;
4483         case OPT_TX_ENTRIES_PER_SUBCRQ:
4484                 adapter->opt_tx_entries_per_subcrq =
4485                     be64_to_cpu(crq->query_capability.number);
4486                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4487                            adapter->opt_tx_entries_per_subcrq);
4488                 break;
4489         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4490                 adapter->opt_rxba_entries_per_subcrq =
4491                     be64_to_cpu(crq->query_capability.number);
4492                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4493                            adapter->opt_rxba_entries_per_subcrq);
4494                 break;
4495         case TX_RX_DESC_REQ:
4496                 adapter->tx_rx_desc_req = crq->query_capability.number;
4497                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4498                            adapter->tx_rx_desc_req);
4499                 break;
4500
4501         default:
4502                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4503                            crq->query_capability.capability);
4504         }
4505
4506 out:
4507         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4508                 adapter->wait_capability = false;
4509                 ibmvnic_send_req_caps(adapter, 0);
4510         }
4511 }
4512
4513 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4514 {
4515         union ibmvnic_crq crq;
4516         int rc;
4517
4518         memset(&crq, 0, sizeof(crq));
4519         crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4520         crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4521
4522         mutex_lock(&adapter->fw_lock);
4523         adapter->fw_done_rc = 0;
4524         reinit_completion(&adapter->fw_done);
4525
4526         rc = ibmvnic_send_crq(adapter, &crq);
4527         if (rc) {
4528                 mutex_unlock(&adapter->fw_lock);
4529                 return rc;
4530         }
4531
4532         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4533         if (rc) {
4534                 mutex_unlock(&adapter->fw_lock);
4535                 return rc;
4536         }
4537
4538         mutex_unlock(&adapter->fw_lock);
4539         return adapter->fw_done_rc ? -EIO : 0;
4540 }
4541
4542 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4543                                        struct ibmvnic_adapter *adapter)
4544 {
4545         struct net_device *netdev = adapter->netdev;
4546         int rc;
4547         __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4548
4549         rc = crq->query_phys_parms_rsp.rc.code;
4550         if (rc) {
4551                 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4552                 return rc;
4553         }
4554         switch (rspeed) {
4555         case IBMVNIC_10MBPS:
4556                 adapter->speed = SPEED_10;
4557                 break;
4558         case IBMVNIC_100MBPS:
4559                 adapter->speed = SPEED_100;
4560                 break;
4561         case IBMVNIC_1GBPS:
4562                 adapter->speed = SPEED_1000;
4563                 break;
4564         case IBMVNIC_10GBP:
4565                 adapter->speed = SPEED_10000;
4566                 break;
4567         case IBMVNIC_25GBPS:
4568                 adapter->speed = SPEED_25000;
4569                 break;
4570         case IBMVNIC_40GBPS:
4571                 adapter->speed = SPEED_40000;
4572                 break;
4573         case IBMVNIC_50GBPS:
4574                 adapter->speed = SPEED_50000;
4575                 break;
4576         case IBMVNIC_100GBPS:
4577                 adapter->speed = SPEED_100000;
4578                 break;
4579         default:
4580                 if (netif_carrier_ok(netdev))
4581                         netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4582                 adapter->speed = SPEED_UNKNOWN;
4583         }
4584         if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4585                 adapter->duplex = DUPLEX_FULL;
4586         else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4587                 adapter->duplex = DUPLEX_HALF;
4588         else
4589                 adapter->duplex = DUPLEX_UNKNOWN;
4590
4591         return rc;
4592 }
4593
4594 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4595                                struct ibmvnic_adapter *adapter)
4596 {
4597         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4598         struct net_device *netdev = adapter->netdev;
4599         struct device *dev = &adapter->vdev->dev;
4600         u64 *u64_crq = (u64 *)crq;
4601         long rc;
4602
4603         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4604                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4605                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4606         switch (gen_crq->first) {
4607         case IBMVNIC_CRQ_INIT_RSP:
4608                 switch (gen_crq->cmd) {
4609                 case IBMVNIC_CRQ_INIT:
4610                         dev_info(dev, "Partner initialized\n");
4611                         adapter->from_passive_init = true;
4612                         adapter->failover_pending = false;
4613                         if (!completion_done(&adapter->init_done)) {
4614                                 complete(&adapter->init_done);
4615                                 adapter->init_done_rc = -EIO;
4616                         }
4617                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4618                         break;
4619                 case IBMVNIC_CRQ_INIT_COMPLETE:
4620                         dev_info(dev, "Partner initialization complete\n");
4621                         adapter->crq.active = true;
4622                         send_version_xchg(adapter);
4623                         break;
4624                 default:
4625                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4626                 }
4627                 return;
4628         case IBMVNIC_CRQ_XPORT_EVENT:
4629                 netif_carrier_off(netdev);
4630                 adapter->crq.active = false;
4631                 /* terminate any thread waiting for a response
4632                  * from the device
4633                  */
4634                 if (!completion_done(&adapter->fw_done)) {
4635                         adapter->fw_done_rc = -EIO;
4636                         complete(&adapter->fw_done);
4637                 }
4638                 if (!completion_done(&adapter->stats_done))
4639                         complete(&adapter->stats_done);
4640                 if (test_bit(0, &adapter->resetting))
4641                         adapter->force_reset_recovery = true;
4642                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4643                         dev_info(dev, "Migrated, re-enabling adapter\n");
4644                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4645                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4646                         dev_info(dev, "Backing device failover detected\n");
4647                         adapter->failover_pending = true;
4648                 } else {
4649                         /* The adapter lost the connection */
4650                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4651                                 gen_crq->cmd);
4652                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4653                 }
4654                 return;
4655         case IBMVNIC_CRQ_CMD_RSP:
4656                 break;
4657         default:
4658                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4659                         gen_crq->first);
4660                 return;
4661         }
4662
4663         switch (gen_crq->cmd) {
4664         case VERSION_EXCHANGE_RSP:
4665                 rc = crq->version_exchange_rsp.rc.code;
4666                 if (rc) {
4667                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4668                         break;
4669                 }
4670                 dev_info(dev, "Partner protocol version is %d\n",
4671                          crq->version_exchange_rsp.version);
4672                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4673                     ibmvnic_version)
4674                         ibmvnic_version =
4675                             be16_to_cpu(crq->version_exchange_rsp.version);
4676                 send_cap_queries(adapter);
4677                 break;
4678         case QUERY_CAPABILITY_RSP:
4679                 handle_query_cap_rsp(crq, adapter);
4680                 break;
4681         case QUERY_MAP_RSP:
4682                 handle_query_map_rsp(crq, adapter);
4683                 break;
4684         case REQUEST_MAP_RSP:
4685                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4686                 complete(&adapter->fw_done);
4687                 break;
4688         case REQUEST_UNMAP_RSP:
4689                 handle_request_unmap_rsp(crq, adapter);
4690                 break;
4691         case REQUEST_CAPABILITY_RSP:
4692                 handle_request_cap_rsp(crq, adapter);
4693                 break;
4694         case LOGIN_RSP:
4695                 netdev_dbg(netdev, "Got Login Response\n");
4696                 handle_login_rsp(crq, adapter);
4697                 break;
4698         case LOGICAL_LINK_STATE_RSP:
4699                 netdev_dbg(netdev,
4700                            "Got Logical Link State Response, state: %d rc: %d\n",
4701                            crq->logical_link_state_rsp.link_state,
4702                            crq->logical_link_state_rsp.rc.code);
4703                 adapter->logical_link_state =
4704                     crq->logical_link_state_rsp.link_state;
4705                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4706                 complete(&adapter->init_done);
4707                 break;
4708         case LINK_STATE_INDICATION:
4709                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4710                 adapter->phys_link_state =
4711                     crq->link_state_indication.phys_link_state;
4712                 adapter->logical_link_state =
4713                     crq->link_state_indication.logical_link_state;
4714                 if (adapter->phys_link_state && adapter->logical_link_state)
4715                         netif_carrier_on(netdev);
4716                 else
4717                         netif_carrier_off(netdev);
4718                 break;
4719         case CHANGE_MAC_ADDR_RSP:
4720                 netdev_dbg(netdev, "Got MAC address change Response\n");
4721                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4722                 break;
4723         case ERROR_INDICATION:
4724                 netdev_dbg(netdev, "Got Error Indication\n");
4725                 handle_error_indication(crq, adapter);
4726                 break;
4727         case REQUEST_STATISTICS_RSP:
4728                 netdev_dbg(netdev, "Got Statistics Response\n");
4729                 complete(&adapter->stats_done);
4730                 break;
4731         case QUERY_IP_OFFLOAD_RSP:
4732                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4733                 handle_query_ip_offload_rsp(adapter);
4734                 break;
4735         case MULTICAST_CTRL_RSP:
4736                 netdev_dbg(netdev, "Got multicast control Response\n");
4737                 break;
4738         case CONTROL_IP_OFFLOAD_RSP:
4739                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4740                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4741                                  sizeof(adapter->ip_offload_ctrl),
4742                                  DMA_TO_DEVICE);
4743                 complete(&adapter->init_done);
4744                 break;
4745         case COLLECT_FW_TRACE_RSP:
4746                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4747                 complete(&adapter->fw_done);
4748                 break;
4749         case GET_VPD_SIZE_RSP:
4750                 handle_vpd_size_rsp(crq, adapter);
4751                 break;
4752         case GET_VPD_RSP:
4753                 handle_vpd_rsp(crq, adapter);
4754                 break;
4755         case QUERY_PHYS_PARMS_RSP:
4756                 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
4757                 complete(&adapter->fw_done);
4758                 break;
4759         default:
4760                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4761                            gen_crq->cmd);
4762         }
4763 }
4764
4765 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4766 {
4767         struct ibmvnic_adapter *adapter = instance;
4768
4769         tasklet_schedule(&adapter->tasklet);
4770         return IRQ_HANDLED;
4771 }
4772
4773 static void ibmvnic_tasklet(void *data)
4774 {
4775         struct ibmvnic_adapter *adapter = data;
4776         struct ibmvnic_crq_queue *queue = &adapter->crq;
4777         union ibmvnic_crq *crq;
4778         unsigned long flags;
4779         bool done = false;
4780
4781         spin_lock_irqsave(&queue->lock, flags);
4782         while (!done) {
4783                 /* Pull all the valid messages off the CRQ */
4784                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4785                         ibmvnic_handle_crq(crq, adapter);
4786                         crq->generic.first = 0;
4787                 }
4788
4789                 /* remain in tasklet until all
4790                  * capabilities responses are received
4791                  */
4792                 if (!adapter->wait_capability)
4793                         done = true;
4794         }
4795         /* if capabilities CRQ's were sent in this tasklet, the following
4796          * tasklet must wait until all responses are received
4797          */
4798         if (atomic_read(&adapter->running_cap_crqs) != 0)
4799                 adapter->wait_capability = true;
4800         spin_unlock_irqrestore(&queue->lock, flags);
4801 }
4802
4803 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4804 {
4805         struct vio_dev *vdev = adapter->vdev;
4806         int rc;
4807
4808         do {
4809                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4810         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4811
4812         if (rc)
4813                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4814
4815         return rc;
4816 }
4817
4818 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4819 {
4820         struct ibmvnic_crq_queue *crq = &adapter->crq;
4821         struct device *dev = &adapter->vdev->dev;
4822         struct vio_dev *vdev = adapter->vdev;
4823         int rc;
4824
4825         /* Close the CRQ */
4826         do {
4827                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4828         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4829
4830         /* Clean out the queue */
4831         memset(crq->msgs, 0, PAGE_SIZE);
4832         crq->cur = 0;
4833         crq->active = false;
4834
4835         /* And re-open it again */
4836         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4837                                 crq->msg_token, PAGE_SIZE);
4838
4839         if (rc == H_CLOSED)
4840                 /* Adapter is good, but other end is not ready */
4841                 dev_warn(dev, "Partner adapter not ready\n");
4842         else if (rc != 0)
4843                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4844
4845         return rc;
4846 }
4847
4848 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4849 {
4850         struct ibmvnic_crq_queue *crq = &adapter->crq;
4851         struct vio_dev *vdev = adapter->vdev;
4852         long rc;
4853
4854         if (!crq->msgs)
4855                 return;
4856
4857         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4858         free_irq(vdev->irq, adapter);
4859         tasklet_kill(&adapter->tasklet);
4860         do {
4861                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4862         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4863
4864         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4865                          DMA_BIDIRECTIONAL);
4866         free_page((unsigned long)crq->msgs);
4867         crq->msgs = NULL;
4868         crq->active = false;
4869 }
4870
4871 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4872 {
4873         struct ibmvnic_crq_queue *crq = &adapter->crq;
4874         struct device *dev = &adapter->vdev->dev;
4875         struct vio_dev *vdev = adapter->vdev;
4876         int rc, retrc = -ENOMEM;
4877
4878         if (crq->msgs)
4879                 return 0;
4880
4881         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4882         /* Should we allocate more than one page? */
4883
4884         if (!crq->msgs)
4885                 return -ENOMEM;
4886
4887         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4888         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4889                                         DMA_BIDIRECTIONAL);
4890         if (dma_mapping_error(dev, crq->msg_token))
4891                 goto map_failed;
4892
4893         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4894                                 crq->msg_token, PAGE_SIZE);
4895
4896         if (rc == H_RESOURCE)
4897                 /* maybe kexecing and resource is busy. try a reset */
4898                 rc = ibmvnic_reset_crq(adapter);
4899         retrc = rc;
4900
4901         if (rc == H_CLOSED) {
4902                 dev_warn(dev, "Partner adapter not ready\n");
4903         } else if (rc) {
4904                 dev_warn(dev, "Error %d opening adapter\n", rc);
4905                 goto reg_crq_failed;
4906         }
4907
4908         retrc = 0;
4909
4910         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4911                      (unsigned long)adapter);
4912
4913         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4914         snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
4915                  adapter->vdev->unit_address);
4916         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
4917         if (rc) {
4918                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4919                         vdev->irq, rc);
4920                 goto req_irq_failed;
4921         }
4922
4923         rc = vio_enable_interrupts(vdev);
4924         if (rc) {
4925                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4926                 goto req_irq_failed;
4927         }
4928
4929         crq->cur = 0;
4930         spin_lock_init(&crq->lock);
4931
4932         return retrc;
4933
4934 req_irq_failed:
4935         tasklet_kill(&adapter->tasklet);
4936         do {
4937                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4938         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4939 reg_crq_failed:
4940         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4941 map_failed:
4942         free_page((unsigned long)crq->msgs);
4943         crq->msgs = NULL;
4944         return retrc;
4945 }
4946
4947 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4948 {
4949         struct device *dev = &adapter->vdev->dev;
4950         unsigned long timeout = msecs_to_jiffies(30000);
4951         u64 old_num_rx_queues, old_num_tx_queues;
4952         int rc;
4953
4954         adapter->from_passive_init = false;
4955
4956         old_num_rx_queues = adapter->req_rx_queues;
4957         old_num_tx_queues = adapter->req_tx_queues;
4958
4959         reinit_completion(&adapter->init_done);
4960         adapter->init_done_rc = 0;
4961         ibmvnic_send_crq_init(adapter);
4962         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4963                 dev_err(dev, "Initialization sequence timed out\n");
4964                 return -1;
4965         }
4966
4967         if (adapter->init_done_rc) {
4968                 release_crq_queue(adapter);
4969                 return adapter->init_done_rc;
4970         }
4971
4972         if (adapter->from_passive_init) {
4973                 adapter->state = VNIC_OPEN;
4974                 adapter->from_passive_init = false;
4975                 return -1;
4976         }
4977
4978         if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
4979             adapter->reset_reason != VNIC_RESET_MOBILITY) {
4980                 if (adapter->req_rx_queues != old_num_rx_queues ||
4981                     adapter->req_tx_queues != old_num_tx_queues) {
4982                         release_sub_crqs(adapter, 0);
4983                         rc = init_sub_crqs(adapter);
4984                 } else {
4985                         rc = reset_sub_crq_queues(adapter);
4986                 }
4987         } else {
4988                 rc = init_sub_crqs(adapter);
4989         }
4990
4991         if (rc) {
4992                 dev_err(dev, "Initialization of sub crqs failed\n");
4993                 release_crq_queue(adapter);
4994                 return rc;
4995         }
4996
4997         rc = init_sub_crq_irqs(adapter);
4998         if (rc) {
4999                 dev_err(dev, "Failed to initialize sub crq irqs\n");
5000                 release_crq_queue(adapter);
5001         }
5002
5003         return rc;
5004 }
5005
5006 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
5007 {
5008         struct device *dev = &adapter->vdev->dev;
5009         unsigned long timeout = msecs_to_jiffies(30000);
5010         int rc;
5011
5012         adapter->from_passive_init = false;
5013
5014         adapter->init_done_rc = 0;
5015         ibmvnic_send_crq_init(adapter);
5016         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5017                 dev_err(dev, "Initialization sequence timed out\n");
5018                 return -1;
5019         }
5020
5021         if (adapter->init_done_rc) {
5022                 release_crq_queue(adapter);
5023                 return adapter->init_done_rc;
5024         }
5025
5026         if (adapter->from_passive_init) {
5027                 adapter->state = VNIC_OPEN;
5028                 adapter->from_passive_init = false;
5029                 return -1;
5030         }
5031
5032         rc = init_sub_crqs(adapter);
5033         if (rc) {
5034                 dev_err(dev, "Initialization of sub crqs failed\n");
5035                 release_crq_queue(adapter);
5036                 return rc;
5037         }
5038
5039         rc = init_sub_crq_irqs(adapter);
5040         if (rc) {
5041                 dev_err(dev, "Failed to initialize sub crq irqs\n");
5042                 release_crq_queue(adapter);
5043         }
5044
5045         return rc;
5046 }
5047
5048 static struct device_attribute dev_attr_failover;
5049
5050 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5051 {
5052         struct ibmvnic_adapter *adapter;
5053         struct net_device *netdev;
5054         unsigned char *mac_addr_p;
5055         int rc;
5056
5057         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5058                 dev->unit_address);
5059
5060         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5061                                                         VETH_MAC_ADDR, NULL);
5062         if (!mac_addr_p) {
5063                 dev_err(&dev->dev,
5064                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5065                         __FILE__, __LINE__);
5066                 return 0;
5067         }
5068
5069         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5070                                    IBMVNIC_MAX_QUEUES);
5071         if (!netdev)
5072                 return -ENOMEM;
5073
5074         adapter = netdev_priv(netdev);
5075         adapter->state = VNIC_PROBING;
5076         dev_set_drvdata(&dev->dev, netdev);
5077         adapter->vdev = dev;
5078         adapter->netdev = netdev;
5079
5080         ether_addr_copy(adapter->mac_addr, mac_addr_p);
5081         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5082         netdev->irq = dev->irq;
5083         netdev->netdev_ops = &ibmvnic_netdev_ops;
5084         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5085         SET_NETDEV_DEV(netdev, &dev->dev);
5086
5087         spin_lock_init(&adapter->stats_lock);
5088
5089         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5090         INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5091                           __ibmvnic_delayed_reset);
5092         INIT_LIST_HEAD(&adapter->rwi_list);
5093         spin_lock_init(&adapter->rwi_lock);
5094         mutex_init(&adapter->fw_lock);
5095         init_completion(&adapter->init_done);
5096         init_completion(&adapter->fw_done);
5097         init_completion(&adapter->reset_done);
5098         init_completion(&adapter->stats_done);
5099         clear_bit(0, &adapter->resetting);
5100
5101         do {
5102                 rc = init_crq_queue(adapter);
5103                 if (rc) {
5104                         dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5105                                 rc);
5106                         goto ibmvnic_init_fail;
5107                 }
5108
5109                 rc = ibmvnic_init(adapter);
5110                 if (rc && rc != EAGAIN)
5111                         goto ibmvnic_init_fail;
5112         } while (rc == EAGAIN);
5113
5114         rc = init_stats_buffers(adapter);
5115         if (rc)
5116                 goto ibmvnic_init_fail;
5117
5118         rc = init_stats_token(adapter);
5119         if (rc)
5120                 goto ibmvnic_stats_fail;
5121
5122         netdev->mtu = adapter->req_mtu - ETH_HLEN;
5123         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5124         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5125
5126         rc = device_create_file(&dev->dev, &dev_attr_failover);
5127         if (rc)
5128                 goto ibmvnic_dev_file_err;
5129
5130         netif_carrier_off(netdev);
5131         rc = register_netdev(netdev);
5132         if (rc) {
5133                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5134                 goto ibmvnic_register_fail;
5135         }
5136         dev_info(&dev->dev, "ibmvnic registered\n");
5137
5138         adapter->state = VNIC_PROBED;
5139
5140         adapter->wait_for_reset = false;
5141
5142         return 0;
5143
5144 ibmvnic_register_fail:
5145         device_remove_file(&dev->dev, &dev_attr_failover);
5146
5147 ibmvnic_dev_file_err:
5148         release_stats_token(adapter);
5149
5150 ibmvnic_stats_fail:
5151         release_stats_buffers(adapter);
5152
5153 ibmvnic_init_fail:
5154         release_sub_crqs(adapter, 1);
5155         release_crq_queue(adapter);
5156         mutex_destroy(&adapter->fw_lock);
5157         free_netdev(netdev);
5158
5159         return rc;
5160 }
5161
5162 static int ibmvnic_remove(struct vio_dev *dev)
5163 {
5164         struct net_device *netdev = dev_get_drvdata(&dev->dev);
5165         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5166
5167         adapter->state = VNIC_REMOVING;
5168         rtnl_lock();
5169         unregister_netdevice(netdev);
5170
5171         release_resources(adapter);
5172         release_sub_crqs(adapter, 1);
5173         release_crq_queue(adapter);
5174
5175         release_stats_token(adapter);
5176         release_stats_buffers(adapter);
5177
5178         adapter->state = VNIC_REMOVED;
5179
5180         rtnl_unlock();
5181         mutex_destroy(&adapter->fw_lock);
5182         device_remove_file(&dev->dev, &dev_attr_failover);
5183         free_netdev(netdev);
5184         dev_set_drvdata(&dev->dev, NULL);
5185
5186         return 0;
5187 }
5188
5189 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5190                               const char *buf, size_t count)
5191 {
5192         struct net_device *netdev = dev_get_drvdata(dev);
5193         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5194         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5195         __be64 session_token;
5196         long rc;
5197
5198         if (!sysfs_streq(buf, "1"))
5199                 return -EINVAL;
5200
5201         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5202                          H_GET_SESSION_TOKEN, 0, 0, 0);
5203         if (rc) {
5204                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5205                            rc);
5206                 return -EINVAL;
5207         }
5208
5209         session_token = (__be64)retbuf[0];
5210         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5211                    be64_to_cpu(session_token));
5212         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5213                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5214         if (rc) {
5215                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5216                            rc);
5217                 return -EINVAL;
5218         }
5219
5220         return count;
5221 }
5222
5223 static DEVICE_ATTR_WO(failover);
5224
5225 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5226 {
5227         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5228         struct ibmvnic_adapter *adapter;
5229         struct iommu_table *tbl;
5230         unsigned long ret = 0;
5231         int i;
5232
5233         tbl = get_iommu_table_base(&vdev->dev);
5234
5235         /* netdev inits at probe time along with the structures we need below*/
5236         if (!netdev)
5237                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5238
5239         adapter = netdev_priv(netdev);
5240
5241         ret += PAGE_SIZE; /* the crq message queue */
5242         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5243
5244         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5245                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5246
5247         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
5248              i++)
5249                 ret += adapter->rx_pool[i].size *
5250                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5251
5252         return ret;
5253 }
5254
5255 static int ibmvnic_resume(struct device *dev)
5256 {
5257         struct net_device *netdev = dev_get_drvdata(dev);
5258         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5259
5260         if (adapter->state != VNIC_OPEN)
5261                 return 0;
5262
5263         tasklet_schedule(&adapter->tasklet);
5264
5265         return 0;
5266 }
5267
5268 static const struct vio_device_id ibmvnic_device_table[] = {
5269         {"network", "IBM,vnic"},
5270         {"", "" }
5271 };
5272 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5273
5274 static const struct dev_pm_ops ibmvnic_pm_ops = {
5275         .resume = ibmvnic_resume
5276 };
5277
5278 static struct vio_driver ibmvnic_driver = {
5279         .id_table       = ibmvnic_device_table,
5280         .probe          = ibmvnic_probe,
5281         .remove         = ibmvnic_remove,
5282         .get_desired_dma = ibmvnic_get_desired_dma,
5283         .name           = ibmvnic_driver_name,
5284         .pm             = &ibmvnic_pm_ops,
5285 };
5286
5287 /* module functions */
5288 static int __init ibmvnic_module_init(void)
5289 {
5290         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5291                 IBMVNIC_DRIVER_VERSION);
5292
5293         return vio_register_driver(&ibmvnic_driver);
5294 }
5295
5296 static void __exit ibmvnic_module_exit(void)
5297 {
5298         vio_unregister_driver(&ibmvnic_driver);
5299 }
5300
5301 module_init(ibmvnic_module_init);
5302 module_exit(ibmvnic_module_exit);