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_query_map(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_query_cap(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_reset_init(struct ibmvnic_adapter *, bool reset);
 108 static void release_crq_queue(struct ibmvnic_adapter *);
 109 static int __ibmvnic_set_mac(struct net_device *, u8 *);
 110 static int init_crq_queue(struct ibmvnic_adapter *adapter);
 111 static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
 112
 113 struct ibmvnic_stat {
 114         char name[ETH_GSTRING_LEN];
 115         int offset;
 116 };
 117
 118 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 119                              offsetof(struct ibmvnic_statistics, stat))
 120 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 121
 122 static const struct ibmvnic_stat ibmvnic_stats[] = {
 123         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 124         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 125         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 126         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 127         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 128         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 129         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 130         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 131         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 132         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 133         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 134         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 135         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 136         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 137         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 138         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 139         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 140         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 141         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 142         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 143         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 144         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 145 };
 146
 147 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 148                           unsigned long length, unsigned long *number,
 149                           unsigned long *irq)
 150 {
 151         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 152         long rc;
 153
 154         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 155         *number = retbuf[0];
 156         *irq = retbuf[1];
 157
 158         return rc;
 159 }
 160
 161 /**
 162  * ibmvnic_wait_for_completion - Check device state and wait for completion
 163  * @adapter: private device data
 164  * @comp_done: completion structure to wait for
 165  * @timeout: time to wait in milliseconds
 166  *
 167  * Wait for a completion signal or until the timeout limit is reached
 168  * while checking that the device is still active.
 169  */
 170 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
 171                                        struct completion *comp_done,
 172                                        unsigned long timeout)
 173 {
 174         struct net_device *netdev;
 175         unsigned long div_timeout;
 176         u8 retry;
 177
 178         netdev = adapter->netdev;
 179         retry = 5;
 180         div_timeout = msecs_to_jiffies(timeout / retry);
 181         while (true) {
 182                 if (!adapter->crq.active) {
 183                         netdev_err(netdev, "Device down!\n");
 184                         return -ENODEV;
 185                 }
 186                 if (!retry--)
 187                         break;
 188                 if (wait_for_completion_timeout(comp_done, div_timeout))
 189                         return 0;
 190         }
 191         netdev_err(netdev, "Operation timed out.\n");
 192         return -ETIMEDOUT;
 193 }
 194
 195 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 196                                 struct ibmvnic_long_term_buff *ltb, int size)
 197 {
 198         struct device *dev = &adapter->vdev->dev;
 199         int rc;
 200
 201         ltb->size = size;
 202         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 203                                        GFP_KERNEL);
 204
 205         if (!ltb->buff) {
 206                 dev_err(dev, "Couldn't alloc long term buffer\n");
 207                 return -ENOMEM;
 208         }
 209         ltb->map_id = adapter->map_id;
 210         adapter->map_id++;
 211
 212         mutex_lock(&adapter->fw_lock);
 213         adapter->fw_done_rc = 0;
 214         reinit_completion(&adapter->fw_done);
 215         rc = send_request_map(adapter, ltb->addr,
 216                               ltb->size, ltb->map_id);
 217         if (rc) {
 218                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 219                 mutex_unlock(&adapter->fw_lock);
 220                 return rc;
 221         }
 222
 223         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
 224         if (rc) {
 225                 dev_err(dev,
 226                         "Long term map request aborted or timed out,rc = %d\n",
 227                         rc);
 228                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 229                 mutex_unlock(&adapter->fw_lock);
 230                 return rc;
 231         }
 232
 233         if (adapter->fw_done_rc) {
 234                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 235                         adapter->fw_done_rc);
 236                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 237                 mutex_unlock(&adapter->fw_lock);
 238                 return -1;
 239         }
 240         mutex_unlock(&adapter->fw_lock);
 241         return 0;
 242 }
 243
 244 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 245                                 struct ibmvnic_long_term_buff *ltb)
 246 {
 247         struct device *dev = &adapter->vdev->dev;
 248
 249         if (!ltb->buff)
 250                 return;
 251
 252         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 253             adapter->reset_reason != VNIC_RESET_MOBILITY)
 254                 send_request_unmap(adapter, ltb->map_id);
 255         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 256 }
 257
 258 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 259                                 struct ibmvnic_long_term_buff *ltb)
 260 {
 261         struct device *dev = &adapter->vdev->dev;
 262         int rc;
 263
 264         memset(ltb->buff, 0, ltb->size);
 265
 266         mutex_lock(&adapter->fw_lock);
 267         adapter->fw_done_rc = 0;
 268
 269         reinit_completion(&adapter->fw_done);
 270         rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 271         if (rc) {
 272                 mutex_unlock(&adapter->fw_lock);
 273                 return rc;
 274         }
 275
 276         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
 277         if (rc) {
 278                 dev_info(dev,
 279                          "Reset failed, long term map request timed out or aborted\n");
 280                 mutex_unlock(&adapter->fw_lock);
 281                 return rc;
 282         }
 283
 284         if (adapter->fw_done_rc) {
 285                 dev_info(dev,
 286                          "Reset failed, attempting to free and reallocate buffer\n");
 287                 free_long_term_buff(adapter, ltb);
 288                 mutex_unlock(&adapter->fw_lock);
 289                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 290         }
 291         mutex_unlock(&adapter->fw_lock);
 292         return 0;
 293 }
 294
 295 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 296 {
 297         int i;
 298
 299         for (i = 0; i < adapter->num_active_rx_pools; i++)
 300                 adapter->rx_pool[i].active = 0;
 301 }
 302
 303 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 304                               struct ibmvnic_rx_pool *pool)
 305 {
 306         int count = pool->size - atomic_read(&pool->available);
 307         u64 handle = adapter->rx_scrq[pool->index]->handle;
 308         struct device *dev = &adapter->vdev->dev;
 309         int buffers_added = 0;
 310         unsigned long lpar_rc;
 311         union sub_crq sub_crq;
 312         struct sk_buff *skb;
 313         unsigned int offset;
 314         dma_addr_t dma_addr;
 315         unsigned char *dst;
 316         int shift = 0;
 317         int index;
 318         int i;
 319
 320         if (!pool->active)
 321                 return;
 322
 323         for (i = 0; i < count; ++i) {
 324                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 325                 if (!skb) {
 326                         dev_err(dev, "Couldn't replenish rx buff\n");
 327                         adapter->replenish_no_mem++;
 328                         break;
 329                 }
 330
 331                 index = pool->free_map[pool->next_free];
 332
 333                 if (pool->rx_buff[index].skb)
 334                         dev_err(dev, "Inconsistent free_map!\n");
 335
 336                 /* Copy the skb to the long term mapped DMA buffer */
 337                 offset = index * pool->buff_size;
 338                 dst = pool->long_term_buff.buff + offset;
 339                 memset(dst, 0, pool->buff_size);
 340                 dma_addr = pool->long_term_buff.addr + offset;
 341                 pool->rx_buff[index].data = dst;
 342
 343                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 344                 pool->rx_buff[index].dma = dma_addr;
 345                 pool->rx_buff[index].skb = skb;
 346                 pool->rx_buff[index].pool_index = pool->index;
 347                 pool->rx_buff[index].size = pool->buff_size;
 348
 349                 memset(&sub_crq, 0, sizeof(sub_crq));
 350                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 351                 sub_crq.rx_add.correlator =
 352                     cpu_to_be64((u64)&pool->rx_buff[index]);
 353                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 354                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 355
 356                 /* The length field of the sCRQ is defined to be 24 bits so the
 357                  * buffer size needs to be left shifted by a byte before it is
 358                  * converted to big endian to prevent the last byte from being
 359                  * truncated.
 360                  */
 361 #ifdef __LITTLE_ENDIAN__
 362                 shift = 8;
 363 #endif
 364                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 365
 366                 lpar_rc = send_subcrq(adapter, handle, &sub_crq);
 367                 if (lpar_rc != H_SUCCESS)
 368                         goto failure;
 369
 370                 buffers_added++;
 371                 adapter->replenish_add_buff_success++;
 372                 pool->next_free = (pool->next_free + 1) % pool->size;
 373         }
 374         atomic_add(buffers_added, &pool->available);
 375         return;
 376
 377 failure:
 378         if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
 379                 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
 380         pool->free_map[pool->next_free] = index;
 381         pool->rx_buff[index].skb = NULL;
 382
 383         dev_kfree_skb_any(skb);
 384         adapter->replenish_add_buff_failure++;
 385         atomic_add(buffers_added, &pool->available);
 386
 387         if (lpar_rc == H_CLOSED || adapter->failover_pending) {
 388                 /* Disable buffer pool replenishment and report carrier off if
 389                  * queue is closed or pending failover.
 390                  * Firmware guarantees that a signal will be sent to the
 391                  * driver, triggering a reset.
 392                  */
 393                 deactivate_rx_pools(adapter);
 394                 netif_carrier_off(adapter->netdev);
 395         }
 396 }
 397
 398 static void replenish_pools(struct ibmvnic_adapter *adapter)
 399 {
 400         int i;
 401
 402         adapter->replenish_task_cycles++;
 403         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 404                 if (adapter->rx_pool[i].active)
 405                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 406         }
 407 }
 408
 409 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 410 {
 411         kfree(adapter->tx_stats_buffers);
 412         kfree(adapter->rx_stats_buffers);
 413         adapter->tx_stats_buffers = NULL;
 414         adapter->rx_stats_buffers = NULL;
 415 }
 416
 417 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 418 {
 419         adapter->tx_stats_buffers =
 420                                 kcalloc(IBMVNIC_MAX_QUEUES,
 421                                         sizeof(struct ibmvnic_tx_queue_stats),
 422                                         GFP_KERNEL);
 423         if (!adapter->tx_stats_buffers)
 424                 return -ENOMEM;
 425
 426         adapter->rx_stats_buffers =
 427                                 kcalloc(IBMVNIC_MAX_QUEUES,
 428                                         sizeof(struct ibmvnic_rx_queue_stats),
 429                                         GFP_KERNEL);
 430         if (!adapter->rx_stats_buffers)
 431                 return -ENOMEM;
 432
 433         return 0;
 434 }
 435
 436 static void release_stats_token(struct ibmvnic_adapter *adapter)
 437 {
 438         struct device *dev = &adapter->vdev->dev;
 439
 440         if (!adapter->stats_token)
 441                 return;
 442
 443         dma_unmap_single(dev, adapter->stats_token,
 444                          sizeof(struct ibmvnic_statistics),
 445                          DMA_FROM_DEVICE);
 446         adapter->stats_token = 0;
 447 }
 448
 449 static int init_stats_token(struct ibmvnic_adapter *adapter)
 450 {
 451         struct device *dev = &adapter->vdev->dev;
 452         dma_addr_t stok;
 453
 454         stok = dma_map_single(dev, &adapter->stats,
 455                               sizeof(struct ibmvnic_statistics),
 456                               DMA_FROM_DEVICE);
 457         if (dma_mapping_error(dev, stok)) {
 458                 dev_err(dev, "Couldn't map stats buffer\n");
 459                 return -1;
 460         }
 461
 462         adapter->stats_token = stok;
 463         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 464         return 0;
 465 }
 466
 467 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 468 {
 469         struct ibmvnic_rx_pool *rx_pool;
 470         u64 buff_size;
 471         int rx_scrqs;
 472         int i, j, rc;
 473
 474         if (!adapter->rx_pool)
 475                 return -1;
 476
 477         buff_size = adapter->cur_rx_buf_sz;
 478         rx_scrqs = adapter->num_active_rx_pools;
 479         for (i = 0; i < rx_scrqs; i++) {
 480                 rx_pool = &adapter->rx_pool[i];
 481
 482                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 483
 484                 if (rx_pool->buff_size != buff_size) {
 485                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 486                         rx_pool->buff_size = buff_size;
 487                         rc = alloc_long_term_buff(adapter,
 488                                                   &rx_pool->long_term_buff,
 489                                                   rx_pool->size *
 490                                                   rx_pool->buff_size);
 491                 } else {
 492                         rc = reset_long_term_buff(adapter,
 493                                                   &rx_pool->long_term_buff);
 494                 }
 495
 496                 if (rc)
 497                         return rc;
 498
 499                 for (j = 0; j < rx_pool->size; j++)
 500                         rx_pool->free_map[j] = j;
 501
 502                 memset(rx_pool->rx_buff, 0,
 503                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 504
 505                 atomic_set(&rx_pool->available, 0);
 506                 rx_pool->next_alloc = 0;
 507                 rx_pool->next_free = 0;
 508                 rx_pool->active = 1;
 509         }
 510
 511         return 0;
 512 }
 513
 514 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 515 {
 516         struct ibmvnic_rx_pool *rx_pool;
 517         int i, j;
 518
 519         if (!adapter->rx_pool)
 520                 return;
 521
 522         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 523                 rx_pool = &adapter->rx_pool[i];
 524
 525                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 526
 527                 kfree(rx_pool->free_map);
 528                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 529
 530                 if (!rx_pool->rx_buff)
 531                         continue;
 532
 533                 for (j = 0; j < rx_pool->size; j++) {
 534                         if (rx_pool->rx_buff[j].skb) {
 535                                 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
 536                                 rx_pool->rx_buff[j].skb = NULL;
 537                         }
 538                 }
 539
 540                 kfree(rx_pool->rx_buff);
 541         }
 542
 543         kfree(adapter->rx_pool);
 544         adapter->rx_pool = NULL;
 545         adapter->num_active_rx_pools = 0;
 546 }
 547
 548 static int init_rx_pools(struct net_device *netdev)
 549 {
 550         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 551         struct device *dev = &adapter->vdev->dev;
 552         struct ibmvnic_rx_pool *rx_pool;
 553         int rxadd_subcrqs;
 554         u64 buff_size;
 555         int i, j;
 556
 557         rxadd_subcrqs = adapter->num_active_rx_scrqs;
 558         buff_size = adapter->cur_rx_buf_sz;
 559
 560         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 561                                    sizeof(struct ibmvnic_rx_pool),
 562                                    GFP_KERNEL);
 563         if (!adapter->rx_pool) {
 564                 dev_err(dev, "Failed to allocate rx pools\n");
 565                 return -1;
 566         }
 567
 568         adapter->num_active_rx_pools = rxadd_subcrqs;
 569
 570         for (i = 0; i < rxadd_subcrqs; i++) {
 571                 rx_pool = &adapter->rx_pool[i];
 572
 573                 netdev_dbg(adapter->netdev,
 574                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 575                            i, adapter->req_rx_add_entries_per_subcrq,
 576                            buff_size);
 577
 578                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 579                 rx_pool->index = i;
 580                 rx_pool->buff_size = buff_size;
 581                 rx_pool->active = 1;
 582
 583                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 584                                             GFP_KERNEL);
 585                 if (!rx_pool->free_map) {
 586                         release_rx_pools(adapter);
 587                         return -1;
 588                 }
 589
 590                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 591                                            sizeof(struct ibmvnic_rx_buff),
 592                                            GFP_KERNEL);
 593                 if (!rx_pool->rx_buff) {
 594                         dev_err(dev, "Couldn't alloc rx buffers\n");
 595                         release_rx_pools(adapter);
 596                         return -1;
 597                 }
 598
 599                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 600                                          rx_pool->size * rx_pool->buff_size)) {
 601                         release_rx_pools(adapter);
 602                         return -1;
 603                 }
 604
 605                 for (j = 0; j < rx_pool->size; ++j)
 606                         rx_pool->free_map[j] = j;
 607
 608                 atomic_set(&rx_pool->available, 0);
 609                 rx_pool->next_alloc = 0;
 610                 rx_pool->next_free = 0;
 611         }
 612
 613         return 0;
 614 }
 615
 616 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
 617                              struct ibmvnic_tx_pool *tx_pool)
 618 {
 619         int rc, i;
 620
 621         rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 622         if (rc)
 623                 return rc;
 624
 625         memset(tx_pool->tx_buff, 0,
 626                tx_pool->num_buffers *
 627                sizeof(struct ibmvnic_tx_buff));
 628
 629         for (i = 0; i < tx_pool->num_buffers; i++)
 630                 tx_pool->free_map[i] = i;
 631
 632         tx_pool->consumer_index = 0;
 633         tx_pool->producer_index = 0;
 634
 635         return 0;
 636 }
 637
 638 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 639 {
 640         int tx_scrqs;
 641         int i, rc;
 642
 643         if (!adapter->tx_pool)
 644                 return -1;
 645
 646         tx_scrqs = adapter->num_active_tx_pools;
 647         for (i = 0; i < tx_scrqs; i++) {
 648                 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
 649                 if (rc)
 650                         return rc;
 651                 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
 652                 if (rc)
 653                         return rc;
 654         }
 655
 656         return 0;
 657 }
 658
 659 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 660 {
 661         if (!adapter->vpd)
 662                 return;
 663
 664         kfree(adapter->vpd->buff);
 665         kfree(adapter->vpd);
 666
 667         adapter->vpd = NULL;
 668 }
 669
 670 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
 671                                 struct ibmvnic_tx_pool *tx_pool)
 672 {
 673         kfree(tx_pool->tx_buff);
 674         kfree(tx_pool->free_map);
 675         free_long_term_buff(adapter, &tx_pool->long_term_buff);
 676 }
 677
 678 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 679 {
 680         int i;
 681
 682         if (!adapter->tx_pool)
 683                 return;
 684
 685         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 686                 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
 687                 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
 688         }
 689
 690         kfree(adapter->tx_pool);
 691         adapter->tx_pool = NULL;
 692         kfree(adapter->tso_pool);
 693         adapter->tso_pool = NULL;
 694         adapter->num_active_tx_pools = 0;
 695 }
 696
 697 static int init_one_tx_pool(struct net_device *netdev,
 698                             struct ibmvnic_tx_pool *tx_pool,
 699                             int num_entries, int buf_size)
 700 {
 701         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 702         int i;
 703
 704         tx_pool->tx_buff = kcalloc(num_entries,
 705                                    sizeof(struct ibmvnic_tx_buff),
 706                                    GFP_KERNEL);
 707         if (!tx_pool->tx_buff)
 708                 return -1;
 709
 710         if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 711                                  num_entries * buf_size))
 712                 return -1;
 713
 714         tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
 715         if (!tx_pool->free_map)
 716                 return -1;
 717
 718         for (i = 0; i < num_entries; i++)
 719                 tx_pool->free_map[i] = i;
 720
 721         tx_pool->consumer_index = 0;
 722         tx_pool->producer_index = 0;
 723         tx_pool->num_buffers = num_entries;
 724         tx_pool->buf_size = buf_size;
 725
 726         return 0;
 727 }
 728
 729 static int init_tx_pools(struct net_device *netdev)
 730 {
 731         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 732         int tx_subcrqs;
 733         int i, rc;
 734
 735         tx_subcrqs = adapter->num_active_tx_scrqs;
 736         adapter->tx_pool = kcalloc(tx_subcrqs,
 737                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 738         if (!adapter->tx_pool)
 739                 return -1;
 740
 741         adapter->tso_pool = kcalloc(tx_subcrqs,
 742                                     sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 743         if (!adapter->tso_pool)
 744                 return -1;
 745
 746         adapter->num_active_tx_pools = tx_subcrqs;
 747
 748         for (i = 0; i < tx_subcrqs; i++) {
 749                 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
 750                                       adapter->req_tx_entries_per_subcrq,
 751                                       adapter->req_mtu + VLAN_HLEN);
 752                 if (rc) {
 753                         release_tx_pools(adapter);
 754                         return rc;
 755                 }
 756
 757                 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
 758                                       IBMVNIC_TSO_BUFS,
 759                                       IBMVNIC_TSO_BUF_SZ);
 760                 if (rc) {
 761                         release_tx_pools(adapter);
 762                         return rc;
 763                 }
 764         }
 765
 766         return 0;
 767 }
 768
 769 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 770 {
 771         int i;
 772
 773         if (adapter->napi_enabled)
 774                 return;
 775
 776         for (i = 0; i < adapter->req_rx_queues; i++)
 777                 napi_enable(&adapter->napi[i]);
 778
 779         adapter->napi_enabled = true;
 780 }
 781
 782 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 783 {
 784         int i;
 785
 786         if (!adapter->napi_enabled)
 787                 return;
 788
 789         for (i = 0; i < adapter->req_rx_queues; i++) {
 790                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 791                 napi_disable(&adapter->napi[i]);
 792         }
 793
 794         adapter->napi_enabled = false;
 795 }
 796
 797 static int init_napi(struct ibmvnic_adapter *adapter)
 798 {
 799         int i;
 800
 801         adapter->napi = kcalloc(adapter->req_rx_queues,
 802                                 sizeof(struct napi_struct), GFP_KERNEL);
 803         if (!adapter->napi)
 804                 return -ENOMEM;
 805
 806         for (i = 0; i < adapter->req_rx_queues; i++) {
 807                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 808                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 809                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 810         }
 811
 812         adapter->num_active_rx_napi = adapter->req_rx_queues;
 813         return 0;
 814 }
 815
 816 static void release_napi(struct ibmvnic_adapter *adapter)
 817 {
 818         int i;
 819
 820         if (!adapter->napi)
 821                 return;
 822
 823         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 824                 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
 825                 netif_napi_del(&adapter->napi[i]);
 826         }
 827
 828         kfree(adapter->napi);
 829         adapter->napi = NULL;
 830         adapter->num_active_rx_napi = 0;
 831         adapter->napi_enabled = false;
 832 }
 833
 834 static int ibmvnic_login(struct net_device *netdev)
 835 {
 836         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 837         unsigned long timeout = msecs_to_jiffies(30000);
 838         int retry_count = 0;
 839         int retries = 10;
 840         bool retry;
 841         int rc;
 842
 843         do {
 844                 retry = false;
 845                 if (retry_count > retries) {
 846                         netdev_warn(netdev, "Login attempts exceeded\n");
 847                         return -1;
 848                 }
 849
 850                 adapter->init_done_rc = 0;
 851                 reinit_completion(&adapter->init_done);
 852                 rc = send_login(adapter);
 853                 if (rc) {
 854                         netdev_warn(netdev, "Unable to login\n");
 855                         return rc;
 856                 }
 857
 858                 if (!wait_for_completion_timeout(&adapter->init_done,
 859                                                  timeout)) {
 860                         netdev_warn(netdev, "Login timed out, retrying...\n");
 861                         retry = true;
 862                         adapter->init_done_rc = 0;
 863                         retry_count++;
 864                         continue;
 865                 }
 866
 867                 if (adapter->init_done_rc == ABORTED) {
 868                         netdev_warn(netdev, "Login aborted, retrying...\n");
 869                         retry = true;
 870                         adapter->init_done_rc = 0;
 871                         retry_count++;
 872                         /* FW or device may be busy, so
 873                          * wait a bit before retrying login
 874                          */
 875                         msleep(500);
 876                 } else if (adapter->init_done_rc == PARTIALSUCCESS) {
 877                         retry_count++;
 878                         release_sub_crqs(adapter, 1);
 879
 880                         retry = true;
 881                         netdev_dbg(netdev,
 882                                    "Received partial success, retrying...\n");
 883                         adapter->init_done_rc = 0;
 884                         reinit_completion(&adapter->init_done);
 885                         send_query_cap(adapter);
 886                         if (!wait_for_completion_timeout(&adapter->init_done,
 887                                                          timeout)) {
 888                                 netdev_warn(netdev,
 889                                             "Capabilities query timed out\n");
 890                                 return -1;
 891                         }
 892
 893                         rc = init_sub_crqs(adapter);
 894                         if (rc) {
 895                                 netdev_warn(netdev,
 896                                             "SCRQ initialization failed\n");
 897                                 return -1;
 898                         }
 899
 900                         rc = init_sub_crq_irqs(adapter);
 901                         if (rc) {
 902                                 netdev_warn(netdev,
 903                                             "SCRQ irq initialization failed\n");
 904                                 return -1;
 905                         }
 906                 } else if (adapter->init_done_rc) {
 907                         netdev_warn(netdev, "Adapter login failed\n");
 908                         return -1;
 909                 }
 910         } while (retry);
 911
 912         __ibmvnic_set_mac(netdev, adapter->mac_addr);
 913
 914         return 0;
 915 }
 916
 917 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 918 {
 919         kfree(adapter->login_buf);
 920         adapter->login_buf = NULL;
 921 }
 922
 923 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 924 {
 925         kfree(adapter->login_rsp_buf);
 926         adapter->login_rsp_buf = NULL;
 927 }
 928
 929 static void release_resources(struct ibmvnic_adapter *adapter)
 930 {
 931         release_vpd_data(adapter);
 932
 933         release_tx_pools(adapter);
 934         release_rx_pools(adapter);
 935
 936         release_napi(adapter);
 937         release_login_rsp_buffer(adapter);
 938 }
 939
 940 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 941 {
 942         struct net_device *netdev = adapter->netdev;
 943         unsigned long timeout = msecs_to_jiffies(30000);
 944         union ibmvnic_crq crq;
 945         bool resend;
 946         int rc;
 947
 948         netdev_dbg(netdev, "setting link state %d\n", link_state);
 949
 950         memset(&crq, 0, sizeof(crq));
 951         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 952         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 953         crq.logical_link_state.link_state = link_state;
 954
 955         do {
 956                 resend = false;
 957
 958                 reinit_completion(&adapter->init_done);
 959                 rc = ibmvnic_send_crq(adapter, &crq);
 960                 if (rc) {
 961                         netdev_err(netdev, "Failed to set link state\n");
 962                         return rc;
 963                 }
 964
 965                 if (!wait_for_completion_timeout(&adapter->init_done,
 966                                                  timeout)) {
 967                         netdev_err(netdev, "timeout setting link state\n");
 968                         return -1;
 969                 }
 970
 971                 if (adapter->init_done_rc == PARTIALSUCCESS) {
 972                         /* Partuial success, delay and re-send */
 973                         mdelay(1000);
 974                         resend = true;
 975                 } else if (adapter->init_done_rc) {
 976                         netdev_warn(netdev, "Unable to set link state, rc=%d\n",
 977                                     adapter->init_done_rc);
 978                         return adapter->init_done_rc;
 979                 }
 980         } while (resend);
 981
 982         return 0;
 983 }
 984
 985 static int set_real_num_queues(struct net_device *netdev)
 986 {
 987         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 988         int rc;
 989
 990         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 991                    adapter->req_tx_queues, adapter->req_rx_queues);
 992
 993         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 994         if (rc) {
 995                 netdev_err(netdev, "failed to set the number of tx queues\n");
 996                 return rc;
 997         }
 998
 999         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
1000         if (rc)
1001                 netdev_err(netdev, "failed to set the number of rx queues\n");
1002
1003         return rc;
1004 }
1005
1006 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
1007 {
1008         struct device *dev = &adapter->vdev->dev;
1009         union ibmvnic_crq crq;
1010         int len = 0;
1011         int rc;
1012
1013         if (adapter->vpd->buff)
1014                 len = adapter->vpd->len;
1015
1016         mutex_lock(&adapter->fw_lock);
1017         adapter->fw_done_rc = 0;
1018         reinit_completion(&adapter->fw_done);
1019
1020         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
1021         crq.get_vpd_size.cmd = GET_VPD_SIZE;
1022         rc = ibmvnic_send_crq(adapter, &crq);
1023         if (rc) {
1024                 mutex_unlock(&adapter->fw_lock);
1025                 return rc;
1026         }
1027
1028         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1029         if (rc) {
1030                 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
1031                 mutex_unlock(&adapter->fw_lock);
1032                 return rc;
1033         }
1034         mutex_unlock(&adapter->fw_lock);
1035
1036         if (!adapter->vpd->len)
1037                 return -ENODATA;
1038
1039         if (!adapter->vpd->buff)
1040                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
1041         else if (adapter->vpd->len != len)
1042                 adapter->vpd->buff =
1043                         krealloc(adapter->vpd->buff,
1044                                  adapter->vpd->len, GFP_KERNEL);
1045
1046         if (!adapter->vpd->buff) {
1047                 dev_err(dev, "Could allocate VPD buffer\n");
1048                 return -ENOMEM;
1049         }
1050
1051         adapter->vpd->dma_addr =
1052                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
1053                                DMA_FROM_DEVICE);
1054         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1055                 dev_err(dev, "Could not map VPD buffer\n");
1056                 kfree(adapter->vpd->buff);
1057                 adapter->vpd->buff = NULL;
1058                 return -ENOMEM;
1059         }
1060
1061         mutex_lock(&adapter->fw_lock);
1062         adapter->fw_done_rc = 0;
1063         reinit_completion(&adapter->fw_done);
1064
1065         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1066         crq.get_vpd.cmd = GET_VPD;
1067         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1068         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1069         rc = ibmvnic_send_crq(adapter, &crq);
1070         if (rc) {
1071                 kfree(adapter->vpd->buff);
1072                 adapter->vpd->buff = NULL;
1073                 mutex_unlock(&adapter->fw_lock);
1074                 return rc;
1075         }
1076
1077         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1078         if (rc) {
1079                 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
1080                 kfree(adapter->vpd->buff);
1081                 adapter->vpd->buff = NULL;
1082                 mutex_unlock(&adapter->fw_lock);
1083                 return rc;
1084         }
1085
1086         mutex_unlock(&adapter->fw_lock);
1087         return 0;
1088 }
1089
1090 static int init_resources(struct ibmvnic_adapter *adapter)
1091 {
1092         struct net_device *netdev = adapter->netdev;
1093         int rc;
1094
1095         rc = set_real_num_queues(netdev);
1096         if (rc)
1097                 return rc;
1098
1099         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1100         if (!adapter->vpd)
1101                 return -ENOMEM;
1102
1103         /* Vital Product Data (VPD) */
1104         rc = ibmvnic_get_vpd(adapter);
1105         if (rc) {
1106                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1107                 return rc;
1108         }
1109
1110         adapter->map_id = 1;
1111
1112         rc = init_napi(adapter);
1113         if (rc)
1114                 return rc;
1115
1116         send_query_map(adapter);
1117
1118         rc = init_rx_pools(netdev);
1119         if (rc)
1120                 return rc;
1121
1122         rc = init_tx_pools(netdev);
1123         return rc;
1124 }
1125
1126 static int __ibmvnic_open(struct net_device *netdev)
1127 {
1128         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1129         enum vnic_state prev_state = adapter->state;
1130         int i, rc;
1131
1132         adapter->state = VNIC_OPENING;
1133         replenish_pools(adapter);
1134         ibmvnic_napi_enable(adapter);
1135
1136         /* We're ready to receive frames, enable the sub-crq interrupts and
1137          * set the logical link state to up
1138          */
1139         for (i = 0; i < adapter->req_rx_queues; i++) {
1140                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1141                 if (prev_state == VNIC_CLOSED)
1142                         enable_irq(adapter->rx_scrq[i]->irq);
1143                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1144         }
1145
1146         for (i = 0; i < adapter->req_tx_queues; i++) {
1147                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1148                 if (prev_state == VNIC_CLOSED)
1149                         enable_irq(adapter->tx_scrq[i]->irq);
1150                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1151         }
1152
1153         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1154         if (rc) {
1155                 for (i = 0; i < adapter->req_rx_queues; i++)
1156                         napi_disable(&adapter->napi[i]);
1157                 release_resources(adapter);
1158                 return rc;
1159         }
1160
1161         netif_tx_start_all_queues(netdev);
1162
1163         if (prev_state == VNIC_CLOSED) {
1164                 for (i = 0; i < adapter->req_rx_queues; i++)
1165                         napi_schedule(&adapter->napi[i]);
1166         }
1167
1168         adapter->state = VNIC_OPEN;
1169         return rc;
1170 }
1171
1172 static int ibmvnic_open(struct net_device *netdev)
1173 {
1174         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1175         int rc;
1176
1177         /* If device failover is pending, just set device state and return.
1178          * Device operation will be handled by reset routine.
1179          */
1180         if (adapter->failover_pending) {
1181                 adapter->state = VNIC_OPEN;
1182                 return 0;
1183         }
1184
1185         if (adapter->state != VNIC_CLOSED) {
1186                 rc = ibmvnic_login(netdev);
1187                 if (rc)
1188                         return rc;
1189
1190                 rc = init_resources(adapter);
1191                 if (rc) {
1192                         netdev_err(netdev, "failed to initialize resources\n");
1193                         release_resources(adapter);
1194                         return rc;
1195                 }
1196         }
1197
1198         rc = __ibmvnic_open(netdev);
1199
1200         return rc;
1201 }
1202
1203 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1204 {
1205         struct ibmvnic_rx_pool *rx_pool;
1206         struct ibmvnic_rx_buff *rx_buff;
1207         u64 rx_entries;
1208         int rx_scrqs;
1209         int i, j;
1210
1211         if (!adapter->rx_pool)
1212                 return;
1213
1214         rx_scrqs = adapter->num_active_rx_pools;
1215         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1216
1217         /* Free any remaining skbs in the rx buffer pools */
1218         for (i = 0; i < rx_scrqs; i++) {
1219                 rx_pool = &adapter->rx_pool[i];
1220                 if (!rx_pool || !rx_pool->rx_buff)
1221                         continue;
1222
1223                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1224                 for (j = 0; j < rx_entries; j++) {
1225                         rx_buff = &rx_pool->rx_buff[j];
1226                         if (rx_buff && rx_buff->skb) {
1227                                 dev_kfree_skb_any(rx_buff->skb);
1228                                 rx_buff->skb = NULL;
1229                         }
1230                 }
1231         }
1232 }
1233
1234 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1235                               struct ibmvnic_tx_pool *tx_pool)
1236 {
1237         struct ibmvnic_tx_buff *tx_buff;
1238         u64 tx_entries;
1239         int i;
1240
1241         if (!tx_pool || !tx_pool->tx_buff)
1242                 return;
1243
1244         tx_entries = tx_pool->num_buffers;
1245
1246         for (i = 0; i < tx_entries; i++) {
1247                 tx_buff = &tx_pool->tx_buff[i];
1248                 if (tx_buff && tx_buff->skb) {
1249                         dev_kfree_skb_any(tx_buff->skb);
1250                         tx_buff->skb = NULL;
1251                 }
1252         }
1253 }
1254
1255 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1256 {
1257         int tx_scrqs;
1258         int i;
1259
1260         if (!adapter->tx_pool || !adapter->tso_pool)
1261                 return;
1262
1263         tx_scrqs = adapter->num_active_tx_pools;
1264
1265         /* Free any remaining skbs in the tx buffer pools */
1266         for (i = 0; i < tx_scrqs; i++) {
1267                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1268                 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1269                 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1270         }
1271 }
1272
1273 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1274 {
1275         struct net_device *netdev = adapter->netdev;
1276         int i;
1277
1278         if (adapter->tx_scrq) {
1279                 for (i = 0; i < adapter->req_tx_queues; i++)
1280                         if (adapter->tx_scrq[i]->irq) {
1281                                 netdev_dbg(netdev,
1282                                            "Disabling tx_scrq[%d] irq\n", i);
1283                                 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1284                                 disable_irq(adapter->tx_scrq[i]->irq);
1285                         }
1286         }
1287
1288         if (adapter->rx_scrq) {
1289                 for (i = 0; i < adapter->req_rx_queues; i++) {
1290                         if (adapter->rx_scrq[i]->irq) {
1291                                 netdev_dbg(netdev,
1292                                            "Disabling rx_scrq[%d] irq\n", i);
1293                                 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1294                                 disable_irq(adapter->rx_scrq[i]->irq);
1295                         }
1296                 }
1297         }
1298 }
1299
1300 static void ibmvnic_cleanup(struct net_device *netdev)
1301 {
1302         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1303
1304         /* ensure that transmissions are stopped if called by do_reset */
1305         if (test_bit(0, &adapter->resetting))
1306                 netif_tx_disable(netdev);
1307         else
1308                 netif_tx_stop_all_queues(netdev);
1309
1310         ibmvnic_napi_disable(adapter);
1311         ibmvnic_disable_irqs(adapter);
1312
1313         clean_rx_pools(adapter);
1314         clean_tx_pools(adapter);
1315 }
1316
1317 static int __ibmvnic_close(struct net_device *netdev)
1318 {
1319         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1320         int rc = 0;
1321
1322         adapter->state = VNIC_CLOSING;
1323         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1324         if (rc)
1325                 return rc;
1326         adapter->state = VNIC_CLOSED;
1327         return 0;
1328 }
1329
1330 static int ibmvnic_close(struct net_device *netdev)
1331 {
1332         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1333         int rc;
1334
1335         /* If device failover is pending, just set device state and return.
1336          * Device operation will be handled by reset routine.
1337          */
1338         if (adapter->failover_pending) {
1339                 adapter->state = VNIC_CLOSED;
1340                 return 0;
1341         }
1342
1343         rc = __ibmvnic_close(netdev);
1344         ibmvnic_cleanup(netdev);
1345
1346         return rc;
1347 }
1348
1349 /**
1350  * build_hdr_data - creates L2/L3/L4 header data buffer
1351  * @hdr_field - bitfield determining needed headers
1352  * @skb - socket buffer
1353  * @hdr_len - array of header lengths
1354  * @tot_len - total length of data
1355  *
1356  * Reads hdr_field to determine which headers are needed by firmware.
1357  * Builds a buffer containing these headers.  Saves individual header
1358  * lengths and total buffer length to be used to build descriptors.
1359  */
1360 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1361                           int *hdr_len, u8 *hdr_data)
1362 {
1363         int len = 0;
1364         u8 *hdr;
1365
1366         if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1367                 hdr_len[0] = sizeof(struct vlan_ethhdr);
1368         else
1369                 hdr_len[0] = sizeof(struct ethhdr);
1370
1371         if (skb->protocol == htons(ETH_P_IP)) {
1372                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1373                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1374                         hdr_len[2] = tcp_hdrlen(skb);
1375                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1376                         hdr_len[2] = sizeof(struct udphdr);
1377         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1378                 hdr_len[1] = sizeof(struct ipv6hdr);
1379                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1380                         hdr_len[2] = tcp_hdrlen(skb);
1381                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1382                         hdr_len[2] = sizeof(struct udphdr);
1383         } else if (skb->protocol == htons(ETH_P_ARP)) {
1384                 hdr_len[1] = arp_hdr_len(skb->dev);
1385                 hdr_len[2] = 0;
1386         }
1387
1388         memset(hdr_data, 0, 120);
1389         if ((hdr_field >> 6) & 1) {
1390                 hdr = skb_mac_header(skb);
1391                 memcpy(hdr_data, hdr, hdr_len[0]);
1392                 len += hdr_len[0];
1393         }
1394
1395         if ((hdr_field >> 5) & 1) {
1396                 hdr = skb_network_header(skb);
1397                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1398                 len += hdr_len[1];
1399         }
1400
1401         if ((hdr_field >> 4) & 1) {
1402                 hdr = skb_transport_header(skb);
1403                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1404                 len += hdr_len[2];
1405         }
1406         return len;
1407 }
1408
1409 /**
1410  * create_hdr_descs - create header and header extension descriptors
1411  * @hdr_field - bitfield determining needed headers
1412  * @data - buffer containing header data
1413  * @len - length of data buffer
1414  * @hdr_len - array of individual header lengths
1415  * @scrq_arr - descriptor array
1416  *
1417  * Creates header and, if needed, header extension descriptors and
1418  * places them in a descriptor array, scrq_arr
1419  */
1420
1421 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1422                             union sub_crq *scrq_arr)
1423 {
1424         union sub_crq hdr_desc;
1425         int tmp_len = len;
1426         int num_descs = 0;
1427         u8 *data, *cur;
1428         int tmp;
1429
1430         while (tmp_len > 0) {
1431                 cur = hdr_data + len - tmp_len;
1432
1433                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1434                 if (cur != hdr_data) {
1435                         data = hdr_desc.hdr_ext.data;
1436                         tmp = tmp_len > 29 ? 29 : tmp_len;
1437                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1438                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1439                         hdr_desc.hdr_ext.len = tmp;
1440                 } else {
1441                         data = hdr_desc.hdr.data;
1442                         tmp = tmp_len > 24 ? 24 : tmp_len;
1443                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1444                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1445                         hdr_desc.hdr.len = tmp;
1446                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1447                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1448                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1449                         hdr_desc.hdr.flag = hdr_field << 1;
1450                 }
1451                 memcpy(data, cur, tmp);
1452                 tmp_len -= tmp;
1453                 *scrq_arr = hdr_desc;
1454                 scrq_arr++;
1455                 num_descs++;
1456         }
1457
1458         return num_descs;
1459 }
1460
1461 /**
1462  * build_hdr_descs_arr - build a header descriptor array
1463  * @skb - socket buffer
1464  * @num_entries - number of descriptors to be sent
1465  * @subcrq - first TX descriptor
1466  * @hdr_field - bit field determining which headers will be sent
1467  *
1468  * This function will build a TX descriptor array with applicable
1469  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1470  */
1471
1472 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1473                                 int *num_entries, u8 hdr_field)
1474 {
1475         int hdr_len[3] = {0, 0, 0};
1476         int tot_len;
1477         u8 *hdr_data = txbuff->hdr_data;
1478
1479         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1480                                  txbuff->hdr_data);
1481         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1482                          txbuff->indir_arr + 1);
1483 }
1484
1485 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1486                                     struct net_device *netdev)
1487 {
1488         /* For some backing devices, mishandling of small packets
1489          * can result in a loss of connection or TX stall. Device
1490          * architects recommend that no packet should be smaller
1491          * than the minimum MTU value provided to the driver, so
1492          * pad any packets to that length
1493          */
1494         if (skb->len < netdev->min_mtu)
1495                 return skb_put_padto(skb, netdev->min_mtu);
1496
1497         return 0;
1498 }
1499
1500 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1501 {
1502         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1503         int queue_num = skb_get_queue_mapping(skb);
1504         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1505         struct device *dev = &adapter->vdev->dev;
1506         struct ibmvnic_tx_buff *tx_buff = NULL;
1507         struct ibmvnic_sub_crq_queue *tx_scrq;
1508         struct ibmvnic_tx_pool *tx_pool;
1509         unsigned int tx_send_failed = 0;
1510         unsigned int tx_map_failed = 0;
1511         unsigned int tx_dropped = 0;
1512         unsigned int tx_packets = 0;
1513         unsigned int tx_bytes = 0;
1514         dma_addr_t data_dma_addr;
1515         struct netdev_queue *txq;
1516         unsigned long lpar_rc;
1517         union sub_crq tx_crq;
1518         unsigned int offset;
1519         int num_entries = 1;
1520         unsigned char *dst;
1521         int index = 0;
1522         u8 proto = 0;
1523         u64 handle;
1524         netdev_tx_t ret = NETDEV_TX_OK;
1525
1526         if (test_bit(0, &adapter->resetting)) {
1527                 if (!netif_subqueue_stopped(netdev, skb))
1528                         netif_stop_subqueue(netdev, queue_num);
1529                 dev_kfree_skb_any(skb);
1530
1531                 tx_send_failed++;
1532                 tx_dropped++;
1533                 ret = NETDEV_TX_OK;
1534                 goto out;
1535         }
1536
1537         if (ibmvnic_xmit_workarounds(skb, netdev)) {
1538                 tx_dropped++;
1539                 tx_send_failed++;
1540                 ret = NETDEV_TX_OK;
1541                 goto out;
1542         }
1543         if (skb_is_gso(skb))
1544                 tx_pool = &adapter->tso_pool[queue_num];
1545         else
1546                 tx_pool = &adapter->tx_pool[queue_num];
1547
1548         tx_scrq = adapter->tx_scrq[queue_num];
1549         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1550         handle = tx_scrq->handle;
1551
1552         index = tx_pool->free_map[tx_pool->consumer_index];
1553
1554         if (index == IBMVNIC_INVALID_MAP) {
1555                 dev_kfree_skb_any(skb);
1556                 tx_send_failed++;
1557                 tx_dropped++;
1558                 ret = NETDEV_TX_OK;
1559                 goto out;
1560         }
1561
1562         tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1563
1564         offset = index * tx_pool->buf_size;
1565         dst = tx_pool->long_term_buff.buff + offset;
1566         memset(dst, 0, tx_pool->buf_size);
1567         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1568
1569         if (skb_shinfo(skb)->nr_frags) {
1570                 int cur, i;
1571
1572                 /* Copy the head */
1573                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1574                 cur = skb_headlen(skb);
1575
1576                 /* Copy the frags */
1577                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1578                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1579
1580                         memcpy(dst + cur,
1581                                page_address(skb_frag_page(frag)) +
1582                                skb_frag_off(frag), skb_frag_size(frag));
1583                         cur += skb_frag_size(frag);
1584                 }
1585         } else {
1586                 skb_copy_from_linear_data(skb, dst, skb->len);
1587         }
1588
1589         tx_pool->consumer_index =
1590             (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1591
1592         tx_buff = &tx_pool->tx_buff[index];
1593         tx_buff->skb = skb;
1594         tx_buff->data_dma[0] = data_dma_addr;
1595         tx_buff->data_len[0] = skb->len;
1596         tx_buff->index = index;
1597         tx_buff->pool_index = queue_num;
1598         tx_buff->last_frag = true;
1599
1600         memset(&tx_crq, 0, sizeof(tx_crq));
1601         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1602         tx_crq.v1.type = IBMVNIC_TX_DESC;
1603         tx_crq.v1.n_crq_elem = 1;
1604         tx_crq.v1.n_sge = 1;
1605         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1606
1607         if (skb_is_gso(skb))
1608                 tx_crq.v1.correlator =
1609                         cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1610         else
1611                 tx_crq.v1.correlator = cpu_to_be32(index);
1612         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1613         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1614         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1615
1616         if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
1617                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1618                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1619         }
1620
1621         if (skb->protocol == htons(ETH_P_IP)) {
1622                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1623                 proto = ip_hdr(skb)->protocol;
1624         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1625                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1626                 proto = ipv6_hdr(skb)->nexthdr;
1627         }
1628
1629         if (proto == IPPROTO_TCP)
1630                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1631         else if (proto == IPPROTO_UDP)
1632                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1633
1634         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1635                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1636                 hdrs += 2;
1637         }
1638         if (skb_is_gso(skb)) {
1639                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1640                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1641                 hdrs += 2;
1642         }
1643         /* determine if l2/3/4 headers are sent to firmware */
1644         if ((*hdrs >> 7) & 1) {
1645                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1646                 tx_crq.v1.n_crq_elem = num_entries;
1647                 tx_buff->num_entries = num_entries;
1648                 tx_buff->indir_arr[0] = tx_crq;
1649                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1650                                                     sizeof(tx_buff->indir_arr),
1651                                                     DMA_TO_DEVICE);
1652                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1653                         dev_kfree_skb_any(skb);
1654                         tx_buff->skb = NULL;
1655                         if (!firmware_has_feature(FW_FEATURE_CMO))
1656                                 dev_err(dev, "tx: unable to map descriptor array\n");
1657                         tx_map_failed++;
1658                         tx_dropped++;
1659                         ret = NETDEV_TX_OK;
1660                         goto tx_err_out;
1661                 }
1662                 lpar_rc = send_subcrq_indirect(adapter, handle,
1663                                                (u64)tx_buff->indir_dma,
1664                                                (u64)num_entries);
1665                 dma_unmap_single(dev, tx_buff->indir_dma,
1666                                  sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
1667         } else {
1668                 tx_buff->num_entries = num_entries;
1669                 lpar_rc = send_subcrq(adapter, handle,
1670                                       &tx_crq);
1671         }
1672         if (lpar_rc != H_SUCCESS) {
1673                 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1674                         dev_err_ratelimited(dev, "tx: send failed\n");
1675                 dev_kfree_skb_any(skb);
1676                 tx_buff->skb = NULL;
1677
1678                 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1679                         /* Disable TX and report carrier off if queue is closed
1680                          * or pending failover.
1681                          * Firmware guarantees that a signal will be sent to the
1682                          * driver, triggering a reset or some other action.
1683                          */
1684                         netif_tx_stop_all_queues(netdev);
1685                         netif_carrier_off(netdev);
1686                 }
1687
1688                 tx_send_failed++;
1689                 tx_dropped++;
1690                 ret = NETDEV_TX_OK;
1691                 goto tx_err_out;
1692         }
1693
1694         if (atomic_add_return(num_entries, &tx_scrq->used)
1695                                         >= adapter->req_tx_entries_per_subcrq) {
1696                 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1697                 netif_stop_subqueue(netdev, queue_num);
1698         }
1699
1700         tx_packets++;
1701         tx_bytes += skb->len;
1702         txq->trans_start = jiffies;
1703         ret = NETDEV_TX_OK;
1704         goto out;
1705
1706 tx_err_out:
1707         /* roll back consumer index and map array*/
1708         if (tx_pool->consumer_index == 0)
1709                 tx_pool->consumer_index =
1710                         tx_pool->num_buffers - 1;
1711         else
1712                 tx_pool->consumer_index--;
1713         tx_pool->free_map[tx_pool->consumer_index] = index;
1714 out:
1715         netdev->stats.tx_dropped += tx_dropped;
1716         netdev->stats.tx_bytes += tx_bytes;
1717         netdev->stats.tx_packets += tx_packets;
1718         adapter->tx_send_failed += tx_send_failed;
1719         adapter->tx_map_failed += tx_map_failed;
1720         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1721         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1722         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1723
1724         return ret;
1725 }
1726
1727 static void ibmvnic_set_multi(struct net_device *netdev)
1728 {
1729         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1730         struct netdev_hw_addr *ha;
1731         union ibmvnic_crq crq;
1732
1733         memset(&crq, 0, sizeof(crq));
1734         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1735         crq.request_capability.cmd = REQUEST_CAPABILITY;
1736
1737         if (netdev->flags & IFF_PROMISC) {
1738                 if (!adapter->promisc_supported)
1739                         return;
1740         } else {
1741                 if (netdev->flags & IFF_ALLMULTI) {
1742                         /* Accept all multicast */
1743                         memset(&crq, 0, sizeof(crq));
1744                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1745                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1746                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1747                         ibmvnic_send_crq(adapter, &crq);
1748                 } else if (netdev_mc_empty(netdev)) {
1749                         /* Reject all multicast */
1750                         memset(&crq, 0, sizeof(crq));
1751                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1752                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1753                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1754                         ibmvnic_send_crq(adapter, &crq);
1755                 } else {
1756                         /* Accept one or more multicast(s) */
1757                         netdev_for_each_mc_addr(ha, netdev) {
1758                                 memset(&crq, 0, sizeof(crq));
1759                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1760                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1761                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1762                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1763                                                 ha->addr);
1764                                 ibmvnic_send_crq(adapter, &crq);
1765                         }
1766                 }
1767         }
1768 }
1769
1770 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
1771 {
1772         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1773         union ibmvnic_crq crq;
1774         int rc;
1775
1776         if (!is_valid_ether_addr(dev_addr)) {
1777                 rc = -EADDRNOTAVAIL;
1778                 goto err;
1779         }
1780
1781         memset(&crq, 0, sizeof(crq));
1782         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1783         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1784         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
1785
1786         mutex_lock(&adapter->fw_lock);
1787         adapter->fw_done_rc = 0;
1788         reinit_completion(&adapter->fw_done);
1789
1790         rc = ibmvnic_send_crq(adapter, &crq);
1791         if (rc) {
1792                 rc = -EIO;
1793                 mutex_unlock(&adapter->fw_lock);
1794                 goto err;
1795         }
1796
1797         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
1798         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1799         if (rc || adapter->fw_done_rc) {
1800                 rc = -EIO;
1801                 mutex_unlock(&adapter->fw_lock);
1802                 goto err;
1803         }
1804         mutex_unlock(&adapter->fw_lock);
1805         return 0;
1806 err:
1807         ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
1808         return rc;
1809 }
1810
1811 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1812 {
1813         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1814         struct sockaddr *addr = p;
1815         int rc;
1816
1817         rc = 0;
1818         ether_addr_copy(adapter->mac_addr, addr->sa_data);
1819         if (adapter->state != VNIC_PROBED)
1820                 rc = __ibmvnic_set_mac(netdev, addr->sa_data);
1821
1822         return rc;
1823 }
1824
1825 /**
1826  * do_change_param_reset returns zero if we are able to keep processing reset
1827  * events, or non-zero if we hit a fatal error and must halt.
1828  */
1829 static int do_change_param_reset(struct ibmvnic_adapter *adapter,
1830                                  struct ibmvnic_rwi *rwi,
1831                                  u32 reset_state)
1832 {
1833         struct net_device *netdev = adapter->netdev;
1834         int i, rc;
1835
1836         netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
1837                    rwi->reset_reason);
1838
1839         netif_carrier_off(netdev);
1840         adapter->reset_reason = rwi->reset_reason;
1841
1842         ibmvnic_cleanup(netdev);
1843
1844         if (reset_state == VNIC_OPEN) {
1845                 rc = __ibmvnic_close(netdev);
1846                 if (rc)
1847                         return rc;
1848         }
1849
1850         release_resources(adapter);
1851         release_sub_crqs(adapter, 1);
1852         release_crq_queue(adapter);
1853
1854         adapter->state = VNIC_PROBED;
1855
1856         rc = init_crq_queue(adapter);
1857
1858         if (rc) {
1859                 netdev_err(adapter->netdev,
1860                            "Couldn't initialize crq. rc=%d\n", rc);
1861                 return rc;
1862         }
1863
1864         rc = ibmvnic_reset_init(adapter, true);
1865         if (rc)
1866                 return IBMVNIC_INIT_FAILED;
1867
1868         /* If the adapter was in PROBE state prior to the reset,
1869          * exit here.
1870          */
1871         if (reset_state == VNIC_PROBED)
1872                 return 0;
1873
1874         rc = ibmvnic_login(netdev);
1875         if (rc) {
1876                 adapter->state = reset_state;
1877                 return rc;
1878         }
1879
1880         rc = init_resources(adapter);
1881         if (rc)
1882                 return rc;
1883
1884         ibmvnic_disable_irqs(adapter);
1885
1886         adapter->state = VNIC_CLOSED;
1887
1888         if (reset_state == VNIC_CLOSED)
1889                 return 0;
1890
1891         rc = __ibmvnic_open(netdev);
1892         if (rc)
1893                 return IBMVNIC_OPEN_FAILED;
1894
1895         /* refresh device's multicast list */
1896         ibmvnic_set_multi(netdev);
1897
1898         /* kick napi */
1899         for (i = 0; i < adapter->req_rx_queues; i++)
1900                 napi_schedule(&adapter->napi[i]);
1901
1902         return 0;
1903 }
1904
1905 /**
1906  * do_reset returns zero if we are able to keep processing reset events, or
1907  * non-zero if we hit a fatal error and must halt.
1908  */
1909 static int do_reset(struct ibmvnic_adapter *adapter,
1910                     struct ibmvnic_rwi *rwi, u32 reset_state)
1911 {
1912         u64 old_num_rx_queues, old_num_tx_queues;
1913         u64 old_num_rx_slots, old_num_tx_slots;
1914         struct net_device *netdev = adapter->netdev;
1915         int i, rc;
1916
1917         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1918                    rwi->reset_reason);
1919
1920         rtnl_lock();
1921
1922         netif_carrier_off(netdev);
1923         adapter->reset_reason = rwi->reset_reason;
1924
1925         old_num_rx_queues = adapter->req_rx_queues;
1926         old_num_tx_queues = adapter->req_tx_queues;
1927         old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
1928         old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
1929
1930         ibmvnic_cleanup(netdev);
1931
1932         if (reset_state == VNIC_OPEN &&
1933             adapter->reset_reason != VNIC_RESET_MOBILITY &&
1934             adapter->reset_reason != VNIC_RESET_FAILOVER) {
1935                 adapter->state = VNIC_CLOSING;
1936
1937                 /* Release the RTNL lock before link state change and
1938                  * re-acquire after the link state change to allow
1939                  * linkwatch_event to grab the RTNL lock and run during
1940                  * a reset.
1941                  */
1942                 rtnl_unlock();
1943                 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1944                 rtnl_lock();
1945                 if (rc)
1946                         goto out;
1947
1948                 if (adapter->state != VNIC_CLOSING) {
1949                         rc = -1;
1950                         goto out;
1951                 }
1952
1953                 adapter->state = VNIC_CLOSED;
1954         }
1955
1956         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1957                 /* remove the closed state so when we call open it appears
1958                  * we are coming from the probed state.
1959                  */
1960                 adapter->state = VNIC_PROBED;
1961
1962                 if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1963                         rc = ibmvnic_reenable_crq_queue(adapter);
1964                         release_sub_crqs(adapter, 1);
1965                 } else {
1966                         rc = ibmvnic_reset_crq(adapter);
1967                         if (rc == H_CLOSED || rc == H_SUCCESS) {
1968                                 rc = vio_enable_interrupts(adapter->vdev);
1969                                 if (rc)
1970                                         netdev_err(adapter->netdev,
1971                                                    "Reset failed to enable interrupts. rc=%d\n",
1972                                                    rc);
1973                         }
1974                 }
1975
1976                 if (rc) {
1977                         netdev_err(adapter->netdev,
1978                                    "Reset couldn't initialize crq. rc=%d\n", rc);
1979                         goto out;
1980                 }
1981
1982                 rc = ibmvnic_reset_init(adapter, true);
1983                 if (rc) {
1984                         rc = IBMVNIC_INIT_FAILED;
1985                         goto out;
1986                 }
1987
1988                 /* If the adapter was in PROBE state prior to the reset,
1989                  * exit here.
1990                  */
1991                 if (reset_state == VNIC_PROBED) {
1992                         rc = 0;
1993                         goto out;
1994                 }
1995
1996                 rc = ibmvnic_login(netdev);
1997                 if (rc) {
1998                         adapter->state = reset_state;
1999                         goto out;
2000                 }
2001
2002                 if (adapter->req_rx_queues != old_num_rx_queues ||
2003                     adapter->req_tx_queues != old_num_tx_queues ||
2004                     adapter->req_rx_add_entries_per_subcrq !=
2005                     old_num_rx_slots ||
2006                     adapter->req_tx_entries_per_subcrq !=
2007                     old_num_tx_slots ||
2008                     !adapter->rx_pool ||
2009                     !adapter->tso_pool ||
2010                     !adapter->tx_pool) {
2011                         release_rx_pools(adapter);
2012                         release_tx_pools(adapter);
2013                         release_napi(adapter);
2014                         release_vpd_data(adapter);
2015
2016                         rc = init_resources(adapter);
2017                         if (rc)
2018                                 goto out;
2019
2020                 } else {
2021                         rc = reset_tx_pools(adapter);
2022                         if (rc) {
2023                                 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
2024                                                 rc);
2025                                 goto out;
2026                         }
2027
2028                         rc = reset_rx_pools(adapter);
2029                         if (rc) {
2030                                 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
2031                                                 rc);
2032                                 goto out;
2033                         }
2034                 }
2035                 ibmvnic_disable_irqs(adapter);
2036         }
2037         adapter->state = VNIC_CLOSED;
2038
2039         if (reset_state == VNIC_CLOSED) {
2040                 rc = 0;
2041                 goto out;
2042         }
2043
2044         rc = __ibmvnic_open(netdev);
2045         if (rc) {
2046                 rc = IBMVNIC_OPEN_FAILED;
2047                 goto out;
2048         }
2049
2050         /* refresh device's multicast list */
2051         ibmvnic_set_multi(netdev);
2052
2053         /* kick napi */
2054         for (i = 0; i < adapter->req_rx_queues; i++)
2055                 napi_schedule(&adapter->napi[i]);
2056
2057         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
2058                 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
2059
2060         rc = 0;
2061
2062 out:
2063         rtnl_unlock();
2064
2065         return rc;
2066 }
2067
2068 static int do_hard_reset(struct ibmvnic_adapter *adapter,
2069                          struct ibmvnic_rwi *rwi, u32 reset_state)
2070 {
2071         struct net_device *netdev = adapter->netdev;
2072         int rc;
2073
2074         netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
2075                    rwi->reset_reason);
2076
2077         netif_carrier_off(netdev);
2078         adapter->reset_reason = rwi->reset_reason;
2079
2080         ibmvnic_cleanup(netdev);
2081         release_resources(adapter);
2082         release_sub_crqs(adapter, 0);
2083         release_crq_queue(adapter);
2084
2085         /* remove the closed state so when we call open it appears
2086          * we are coming from the probed state.
2087          */
2088         adapter->state = VNIC_PROBED;
2089
2090         reinit_completion(&adapter->init_done);
2091         rc = init_crq_queue(adapter);
2092         if (rc) {
2093                 netdev_err(adapter->netdev,
2094                            "Couldn't initialize crq. rc=%d\n", rc);
2095                 return rc;
2096         }
2097
2098         rc = ibmvnic_reset_init(adapter, false);
2099         if (rc)
2100                 return rc;
2101
2102         /* If the adapter was in PROBE state prior to the reset,
2103          * exit here.
2104          */
2105         if (reset_state == VNIC_PROBED)
2106                 return 0;
2107
2108         rc = ibmvnic_login(netdev);
2109         if (rc) {
2110                 adapter->state = VNIC_PROBED;
2111                 return 0;
2112         }
2113
2114         rc = init_resources(adapter);
2115         if (rc)
2116                 return rc;
2117
2118         ibmvnic_disable_irqs(adapter);
2119         adapter->state = VNIC_CLOSED;
2120
2121         if (reset_state == VNIC_CLOSED)
2122                 return 0;
2123
2124         rc = __ibmvnic_open(netdev);
2125         if (rc)
2126                 return IBMVNIC_OPEN_FAILED;
2127
2128         return 0;
2129 }
2130
2131 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
2132 {
2133         struct ibmvnic_rwi *rwi;
2134         unsigned long flags;
2135
2136         spin_lock_irqsave(&adapter->rwi_lock, flags);
2137
2138         if (!list_empty(&adapter->rwi_list)) {
2139                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
2140                                        list);
2141                 list_del(&rwi->list);
2142         } else {
2143                 rwi = NULL;
2144         }
2145
2146         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2147         return rwi;
2148 }
2149
2150 static void free_all_rwi(struct ibmvnic_adapter *adapter)
2151 {
2152         struct ibmvnic_rwi *rwi;
2153
2154         rwi = get_next_rwi(adapter);
2155         while (rwi) {
2156                 kfree(rwi);
2157                 rwi = get_next_rwi(adapter);
2158         }
2159 }
2160
2161 static void __ibmvnic_reset(struct work_struct *work)
2162 {
2163         struct ibmvnic_rwi *rwi;
2164         struct ibmvnic_adapter *adapter;
2165         bool saved_state = false;
2166         unsigned long flags;
2167         u32 reset_state;
2168         int rc = 0;
2169
2170         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
2171
2172         if (test_and_set_bit_lock(0, &adapter->resetting)) {
2173                 schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
2174                                       IBMVNIC_RESET_DELAY);
2175                 return;
2176         }
2177
2178         rwi = get_next_rwi(adapter);
2179         while (rwi) {
2180                 spin_lock_irqsave(&adapter->state_lock, flags);
2181
2182                 if (adapter->state == VNIC_REMOVING ||
2183                     adapter->state == VNIC_REMOVED) {
2184                         spin_unlock_irqrestore(&adapter->state_lock, flags);
2185                         kfree(rwi);
2186                         rc = EBUSY;
2187                         break;
2188                 }
2189
2190                 if (!saved_state) {
2191                         reset_state = adapter->state;
2192                         adapter->state = VNIC_RESETTING;
2193                         saved_state = true;
2194                 }
2195                 spin_unlock_irqrestore(&adapter->state_lock, flags);
2196
2197                 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
2198                         /* CHANGE_PARAM requestor holds rtnl_lock */
2199                         rc = do_change_param_reset(adapter, rwi, reset_state);
2200                 } else if (adapter->force_reset_recovery) {
2201                         /* Transport event occurred during previous reset */
2202                         if (adapter->wait_for_reset) {
2203                                 /* Previous was CHANGE_PARAM; caller locked */
2204                                 adapter->force_reset_recovery = false;
2205                                 rc = do_hard_reset(adapter, rwi, reset_state);
2206                         } else {
2207                                 rtnl_lock();
2208                                 adapter->force_reset_recovery = false;
2209                                 rc = do_hard_reset(adapter, rwi, reset_state);
2210                                 rtnl_unlock();
2211                         }
2212                 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL &&
2213                                 adapter->from_passive_init)) {
2214                         rc = do_reset(adapter, rwi, reset_state);
2215                 }
2216                 kfree(rwi);
2217                 if (rc == IBMVNIC_OPEN_FAILED) {
2218                         if (list_empty(&adapter->rwi_list))
2219                                 adapter->state = VNIC_CLOSED;
2220                         else
2221                                 adapter->state = reset_state;
2222                         rc = 0;
2223                 } else if (rc && rc != IBMVNIC_INIT_FAILED &&
2224                     !adapter->force_reset_recovery)
2225                         break;
2226
2227                 rwi = get_next_rwi(adapter);
2228
2229                 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
2230                             rwi->reset_reason == VNIC_RESET_MOBILITY))
2231                         adapter->force_reset_recovery = true;
2232         }
2233
2234         if (adapter->wait_for_reset) {
2235                 adapter->reset_done_rc = rc;
2236                 complete(&adapter->reset_done);
2237         }
2238
2239         if (rc) {
2240                 netdev_dbg(adapter->netdev, "Reset failed\n");
2241                 free_all_rwi(adapter);
2242         }
2243
2244         clear_bit_unlock(0, &adapter->resetting);
2245 }
2246
2247 static void __ibmvnic_delayed_reset(struct work_struct *work)
2248 {
2249         struct ibmvnic_adapter *adapter;
2250
2251         adapter = container_of(work, struct ibmvnic_adapter,
2252                                ibmvnic_delayed_reset.work);
2253         __ibmvnic_reset(&adapter->ibmvnic_reset);
2254 }
2255
2256 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2257                          enum ibmvnic_reset_reason reason)
2258 {
2259         struct list_head *entry, *tmp_entry;
2260         struct ibmvnic_rwi *rwi, *tmp;
2261         struct net_device *netdev = adapter->netdev;
2262         unsigned long flags;
2263         int ret;
2264
2265         if (adapter->state == VNIC_REMOVING ||
2266             adapter->state == VNIC_REMOVED ||
2267             adapter->failover_pending) {
2268                 ret = EBUSY;
2269                 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2270                 goto err;
2271         }
2272
2273         if (adapter->state == VNIC_PROBING) {
2274                 netdev_warn(netdev, "Adapter reset during probe\n");
2275                 ret = adapter->init_done_rc = EAGAIN;
2276                 goto err;
2277         }
2278
2279         spin_lock_irqsave(&adapter->rwi_lock, flags);
2280
2281         list_for_each(entry, &adapter->rwi_list) {
2282                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2283                 if (tmp->reset_reason == reason) {
2284                         netdev_dbg(netdev, "Skipping matching reset\n");
2285                         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2286                         ret = EBUSY;
2287                         goto err;
2288                 }
2289         }
2290
2291         rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
2292         if (!rwi) {
2293                 spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2294                 ibmvnic_close(netdev);
2295                 ret = ENOMEM;
2296                 goto err;
2297         }
2298         /* if we just received a transport event,
2299          * flush reset queue and process this reset
2300          */
2301         if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2302                 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2303                         list_del(entry);
2304         }
2305         rwi->reset_reason = reason;
2306         list_add_tail(&rwi->list, &adapter->rwi_list);
2307         spin_unlock_irqrestore(&adapter->rwi_lock, flags);
2308         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2309         schedule_work(&adapter->ibmvnic_reset);
2310
2311         return 0;
2312 err:
2313         return -ret;
2314 }
2315
2316 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
2317 {
2318         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2319
2320         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2321 }
2322
2323 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2324                                   struct ibmvnic_rx_buff *rx_buff)
2325 {
2326         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2327
2328         rx_buff->skb = NULL;
2329
2330         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2331         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2332
2333         atomic_dec(&pool->available);
2334 }
2335
2336 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2337 {
2338         struct net_device *netdev = napi->dev;
2339         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2340         int scrq_num = (int)(napi - adapter->napi);
2341         int frames_processed = 0;
2342
2343 restart_poll:
2344         while (frames_processed < budget) {
2345                 struct sk_buff *skb;
2346                 struct ibmvnic_rx_buff *rx_buff;
2347                 union sub_crq *next;
2348                 u32 length;
2349                 u16 offset;
2350                 u8 flags = 0;
2351
2352                 if (unlikely(test_bit(0, &adapter->resetting) &&
2353                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2354                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2355                         napi_complete_done(napi, frames_processed);
2356                         return frames_processed;
2357                 }
2358
2359                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2360                         break;
2361                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2362                 rx_buff =
2363                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2364                                                           rx_comp.correlator);
2365                 /* do error checking */
2366                 if (next->rx_comp.rc) {
2367                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2368                                    be16_to_cpu(next->rx_comp.rc));
2369                         /* free the entry */
2370                         next->rx_comp.first = 0;
2371                         dev_kfree_skb_any(rx_buff->skb);
2372                         remove_buff_from_pool(adapter, rx_buff);
2373                         continue;
2374                 } else if (!rx_buff->skb) {
2375                         /* free the entry */
2376                         next->rx_comp.first = 0;
2377                         remove_buff_from_pool(adapter, rx_buff);
2378                         continue;
2379                 }
2380
2381                 length = be32_to_cpu(next->rx_comp.len);
2382                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2383                 flags = next->rx_comp.flags;
2384                 skb = rx_buff->skb;
2385                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2386                                         length);
2387
2388                 /* VLAN Header has been stripped by the system firmware and
2389                  * needs to be inserted by the driver
2390                  */
2391                 if (adapter->rx_vlan_header_insertion &&
2392                     (flags & IBMVNIC_VLAN_STRIPPED))
2393                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2394                                                ntohs(next->rx_comp.vlan_tci));
2395
2396                 /* free the entry */
2397                 next->rx_comp.first = 0;
2398                 remove_buff_from_pool(adapter, rx_buff);
2399
2400                 skb_put(skb, length);
2401                 skb->protocol = eth_type_trans(skb, netdev);
2402                 skb_record_rx_queue(skb, scrq_num);
2403
2404                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2405                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2406                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2407                 }
2408
2409                 length = skb->len;
2410                 napi_gro_receive(napi, skb); /* send it up */
2411                 netdev->stats.rx_packets++;
2412                 netdev->stats.rx_bytes += length;
2413                 adapter->rx_stats_buffers[scrq_num].packets++;
2414                 adapter->rx_stats_buffers[scrq_num].bytes += length;
2415                 frames_processed++;
2416         }
2417
2418         if (adapter->state != VNIC_CLOSING)
2419                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2420
2421         if (frames_processed < budget) {
2422                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2423                 napi_complete_done(napi, frames_processed);
2424                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2425                     napi_reschedule(napi)) {
2426                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2427                         goto restart_poll;
2428                 }
2429         }
2430         return frames_processed;
2431 }
2432
2433 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2434 {
2435         int rc, ret;
2436
2437         adapter->fallback.mtu = adapter->req_mtu;
2438         adapter->fallback.rx_queues = adapter->req_rx_queues;
2439         adapter->fallback.tx_queues = adapter->req_tx_queues;
2440         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2441         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2442
2443         reinit_completion(&adapter->reset_done);
2444         adapter->wait_for_reset = true;
2445         rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2446
2447         if (rc) {
2448                 ret = rc;
2449                 goto out;
2450         }
2451         rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
2452         if (rc) {
2453                 ret = -ENODEV;
2454                 goto out;
2455         }
2456
2457         ret = 0;
2458         if (adapter->reset_done_rc) {
2459                 ret = -EIO;
2460                 adapter->desired.mtu = adapter->fallback.mtu;
2461                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2462                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2463                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2464                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2465
2466                 reinit_completion(&adapter->reset_done);
2467                 adapter->wait_for_reset = true;
2468                 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2469                 if (rc) {
2470                         ret = rc;
2471                         goto out;
2472                 }
2473                 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
2474                                                  60000);
2475                 if (rc) {
2476                         ret = -ENODEV;
2477                         goto out;
2478                 }
2479         }
2480 out:
2481         adapter->wait_for_reset = false;
2482
2483         return ret;
2484 }
2485
2486 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2487 {
2488         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2489
2490         adapter->desired.mtu = new_mtu + ETH_HLEN;
2491
2492         return wait_for_reset(adapter);
2493 }
2494
2495 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2496                                                 struct net_device *dev,
2497                                                 netdev_features_t features)
2498 {
2499         /* Some backing hardware adapters can not
2500          * handle packets with a MSS less than 224
2501          * or with only one segment.
2502          */
2503         if (skb_is_gso(skb)) {
2504                 if (skb_shinfo(skb)->gso_size < 224 ||
2505                     skb_shinfo(skb)->gso_segs == 1)
2506                         features &= ~NETIF_F_GSO_MASK;
2507         }
2508
2509         return features;
2510 }
2511
2512 static const struct net_device_ops ibmvnic_netdev_ops = {
2513         .ndo_open               = ibmvnic_open,
2514         .ndo_stop               = ibmvnic_close,
2515         .ndo_start_xmit         = ibmvnic_xmit,
2516         .ndo_set_rx_mode        = ibmvnic_set_multi,
2517         .ndo_set_mac_address    = ibmvnic_set_mac,
2518         .ndo_validate_addr      = eth_validate_addr,
2519         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2520         .ndo_change_mtu         = ibmvnic_change_mtu,
2521         .ndo_features_check     = ibmvnic_features_check,
2522 };
2523
2524 /* ethtool functions */
2525
2526 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2527                                       struct ethtool_link_ksettings *cmd)
2528 {
2529         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2530         int rc;
2531
2532         rc = send_query_phys_parms(adapter);
2533         if (rc) {
2534                 adapter->speed = SPEED_UNKNOWN;
2535                 adapter->duplex = DUPLEX_UNKNOWN;
2536         }
2537         cmd->base.speed = adapter->speed;
2538         cmd->base.duplex = adapter->duplex;
2539         cmd->base.port = PORT_FIBRE;
2540         cmd->base.phy_address = 0;
2541         cmd->base.autoneg = AUTONEG_ENABLE;
2542
2543         return 0;
2544 }
2545
2546 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2547                                 struct ethtool_drvinfo *info)
2548 {
2549         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2550
2551         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2552         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2553         strlcpy(info->fw_version, adapter->fw_version,
2554                 sizeof(info->fw_version));
2555 }
2556
2557 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2558 {
2559         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2560
2561         return adapter->msg_enable;
2562 }
2563
2564 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2565 {
2566         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2567
2568         adapter->msg_enable = data;
2569 }
2570
2571 static u32 ibmvnic_get_link(struct net_device *netdev)
2572 {
2573         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2574
2575         /* Don't need to send a query because we request a logical link up at
2576          * init and then we wait for link state indications
2577          */
2578         return adapter->logical_link_state;
2579 }
2580
2581 static void ibmvnic_get_ringparam(struct net_device *netdev,
2582                                   struct ethtool_ringparam *ring)
2583 {
2584         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2585
2586         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2587                 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2588                 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2589         } else {
2590                 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2591                 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ;
2592         }
2593         ring->rx_mini_max_pending = 0;
2594         ring->rx_jumbo_max_pending = 0;
2595         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2596         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2597         ring->rx_mini_pending = 0;
2598         ring->rx_jumbo_pending = 0;
2599 }
2600
2601 static int ibmvnic_set_ringparam(struct net_device *netdev,
2602                                  struct ethtool_ringparam *ring)
2603 {
2604         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2605         int ret;
2606
2607         ret = 0;
2608         adapter->desired.rx_entries = ring->rx_pending;
2609         adapter->desired.tx_entries = ring->tx_pending;
2610
2611         ret = wait_for_reset(adapter);
2612
2613         if (!ret &&
2614             (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending ||
2615              adapter->req_tx_entries_per_subcrq != ring->tx_pending))
2616                 netdev_info(netdev,
2617                             "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2618                             ring->rx_pending, ring->tx_pending,
2619                             adapter->req_rx_add_entries_per_subcrq,
2620                             adapter->req_tx_entries_per_subcrq);
2621         return ret;
2622 }
2623
2624 static void ibmvnic_get_channels(struct net_device *netdev,
2625                                  struct ethtool_channels *channels)
2626 {
2627         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2628
2629         if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) {
2630                 channels->max_rx = adapter->max_rx_queues;
2631                 channels->max_tx = adapter->max_tx_queues;
2632         } else {
2633                 channels->max_rx = IBMVNIC_MAX_QUEUES;
2634                 channels->max_tx = IBMVNIC_MAX_QUEUES;
2635         }
2636
2637         channels->max_other = 0;
2638         channels->max_combined = 0;
2639         channels->rx_count = adapter->req_rx_queues;
2640         channels->tx_count = adapter->req_tx_queues;
2641         channels->other_count = 0;
2642         channels->combined_count = 0;
2643 }
2644
2645 static int ibmvnic_set_channels(struct net_device *netdev,
2646                                 struct ethtool_channels *channels)
2647 {
2648         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2649         int ret;
2650
2651         ret = 0;
2652         adapter->desired.rx_queues = channels->rx_count;
2653         adapter->desired.tx_queues = channels->tx_count;
2654
2655         ret = wait_for_reset(adapter);
2656
2657         if (!ret &&
2658             (adapter->req_rx_queues != channels->rx_count ||
2659              adapter->req_tx_queues != channels->tx_count))
2660                 netdev_info(netdev,
2661                             "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n",
2662                             channels->rx_count, channels->tx_count,
2663                             adapter->req_rx_queues, adapter->req_tx_queues);
2664         return ret;
2665
2666 }
2667
2668 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2669 {
2670         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2671         int i;
2672
2673         switch (stringset) {
2674         case ETH_SS_STATS:
2675                 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats);
2676                                 i++, data += ETH_GSTRING_LEN)
2677                         memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2678
2679                 for (i = 0; i < adapter->req_tx_queues; i++) {
2680                         snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2681                         data += ETH_GSTRING_LEN;
2682
2683                         snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2684                         data += ETH_GSTRING_LEN;
2685
2686                         snprintf(data, ETH_GSTRING_LEN,
2687                                  "tx%d_dropped_packets", i);
2688                         data += ETH_GSTRING_LEN;
2689                 }
2690
2691                 for (i = 0; i < adapter->req_rx_queues; i++) {
2692                         snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2693                         data += ETH_GSTRING_LEN;
2694
2695                         snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2696                         data += ETH_GSTRING_LEN;
2697
2698                         snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2699                         data += ETH_GSTRING_LEN;
2700                 }
2701                 break;
2702
2703         case ETH_SS_PRIV_FLAGS:
2704                 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++)
2705                         strcpy(data + i * ETH_GSTRING_LEN,
2706                                ibmvnic_priv_flags[i]);
2707                 break;
2708         default:
2709                 return;
2710         }
2711 }
2712
2713 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2714 {
2715         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2716
2717         switch (sset) {
2718         case ETH_SS_STATS:
2719                 return ARRAY_SIZE(ibmvnic_stats) +
2720                        adapter->req_tx_queues * NUM_TX_STATS +
2721                        adapter->req_rx_queues * NUM_RX_STATS;
2722         case ETH_SS_PRIV_FLAGS:
2723                 return ARRAY_SIZE(ibmvnic_priv_flags);
2724         default:
2725                 return -EOPNOTSUPP;
2726         }
2727 }
2728
2729 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2730                                       struct ethtool_stats *stats, u64 *data)
2731 {
2732         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2733         union ibmvnic_crq crq;
2734         int i, j;
2735         int rc;
2736
2737         memset(&crq, 0, sizeof(crq));
2738         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2739         crq.request_statistics.cmd = REQUEST_STATISTICS;
2740         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2741         crq.request_statistics.len =
2742             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2743
2744         /* Wait for data to be written */
2745         reinit_completion(&adapter->stats_done);
2746         rc = ibmvnic_send_crq(adapter, &crq);
2747         if (rc)
2748                 return;
2749         rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
2750         if (rc)
2751                 return;
2752
2753         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2754                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2755                                                 ibmvnic_stats[i].offset));
2756
2757         for (j = 0; j < adapter->req_tx_queues; j++) {
2758                 data[i] = adapter->tx_stats_buffers[j].packets;
2759                 i++;
2760                 data[i] = adapter->tx_stats_buffers[j].bytes;
2761                 i++;
2762                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2763                 i++;
2764         }
2765
2766         for (j = 0; j < adapter->req_rx_queues; j++) {
2767                 data[i] = adapter->rx_stats_buffers[j].packets;
2768                 i++;
2769                 data[i] = adapter->rx_stats_buffers[j].bytes;
2770                 i++;
2771                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2772                 i++;
2773         }
2774 }
2775
2776 static u32 ibmvnic_get_priv_flags(struct net_device *netdev)
2777 {
2778         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2779
2780         return adapter->priv_flags;
2781 }
2782
2783 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags)
2784 {
2785         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2786         bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES);
2787
2788         if (which_maxes)
2789                 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES;
2790         else
2791                 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES;
2792
2793         return 0;
2794 }
2795 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2796         .get_drvinfo            = ibmvnic_get_drvinfo,
2797         .get_msglevel           = ibmvnic_get_msglevel,
2798         .set_msglevel           = ibmvnic_set_msglevel,
2799         .get_link               = ibmvnic_get_link,
2800         .get_ringparam          = ibmvnic_get_ringparam,
2801         .set_ringparam          = ibmvnic_set_ringparam,
2802         .get_channels           = ibmvnic_get_channels,
2803         .set_channels           = ibmvnic_set_channels,
2804         .get_strings            = ibmvnic_get_strings,
2805         .get_sset_count         = ibmvnic_get_sset_count,
2806         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2807         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2808         .get_priv_flags         = ibmvnic_get_priv_flags,
2809         .set_priv_flags         = ibmvnic_set_priv_flags,
2810 };
2811
2812 /* Routines for managing CRQs/sCRQs  */
2813
2814 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2815                                    struct ibmvnic_sub_crq_queue *scrq)
2816 {
2817         int rc;
2818
2819         if (scrq->irq) {
2820                 free_irq(scrq->irq, scrq);
2821                 irq_dispose_mapping(scrq->irq);
2822                 scrq->irq = 0;
2823         }
2824
2825         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2826         atomic_set(&scrq->used, 0);
2827         scrq->cur = 0;
2828
2829         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2830                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2831         return rc;
2832 }
2833
2834 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2835 {
2836         int i, rc;
2837
2838         for (i = 0; i < adapter->req_tx_queues; i++) {
2839                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2840                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2841                 if (rc)
2842                         return rc;
2843         }
2844
2845         for (i = 0; i < adapter->req_rx_queues; i++) {
2846                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2847                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2848                 if (rc)
2849                         return rc;
2850         }
2851
2852         return rc;
2853 }
2854
2855 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2856                                   struct ibmvnic_sub_crq_queue *scrq,
2857                                   bool do_h_free)
2858 {
2859         struct device *dev = &adapter->vdev->dev;
2860         long rc;
2861
2862         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2863
2864         if (do_h_free) {
2865                 /* Close the sub-crqs */
2866                 do {
2867                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2868                                                 adapter->vdev->unit_address,
2869                                                 scrq->crq_num);
2870                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2871
2872                 if (rc) {
2873                         netdev_err(adapter->netdev,
2874                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2875                                    scrq->crq_num, rc);
2876                 }
2877         }
2878
2879         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2880                          DMA_BIDIRECTIONAL);
2881         free_pages((unsigned long)scrq->msgs, 2);
2882         kfree(scrq);
2883 }
2884
2885 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2886                                                         *adapter)
2887 {
2888         struct device *dev = &adapter->vdev->dev;
2889         struct ibmvnic_sub_crq_queue *scrq;
2890         int rc;
2891
2892         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2893         if (!scrq)
2894                 return NULL;
2895
2896         scrq->msgs =
2897                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2898         if (!scrq->msgs) {
2899                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2900                 goto zero_page_failed;
2901         }
2902
2903         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2904                                          DMA_BIDIRECTIONAL);
2905         if (dma_mapping_error(dev, scrq->msg_token)) {
2906                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2907                 goto map_failed;
2908         }
2909
2910         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2911                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2912
2913         if (rc == H_RESOURCE)
2914                 rc = ibmvnic_reset_crq(adapter);
2915
2916         if (rc == H_CLOSED) {
2917                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2918         } else if (rc) {
2919                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2920                 goto reg_failed;
2921         }
2922
2923         scrq->adapter = adapter;
2924         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2925         spin_lock_init(&scrq->lock);
2926
2927         netdev_dbg(adapter->netdev,
2928                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2929                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2930
2931         return scrq;
2932
2933 reg_failed:
2934         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2935                          DMA_BIDIRECTIONAL);
2936 map_failed:
2937         free_pages((unsigned long)scrq->msgs, 2);
2938 zero_page_failed:
2939         kfree(scrq);
2940
2941         return NULL;
2942 }
2943
2944 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2945 {
2946         int i;
2947
2948         if (adapter->tx_scrq) {
2949                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2950                         if (!adapter->tx_scrq[i])
2951                                 continue;
2952
2953                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2954                                    i);
2955                         if (adapter->tx_scrq[i]->irq) {
2956                                 free_irq(adapter->tx_scrq[i]->irq,
2957                                          adapter->tx_scrq[i]);
2958                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2959                                 adapter->tx_scrq[i]->irq = 0;
2960                         }
2961
2962                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2963                                               do_h_free);
2964                 }
2965
2966                 kfree(adapter->tx_scrq);
2967                 adapter->tx_scrq = NULL;
2968                 adapter->num_active_tx_scrqs = 0;
2969         }
2970
2971         if (adapter->rx_scrq) {
2972                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2973                         if (!adapter->rx_scrq[i])
2974                                 continue;
2975
2976                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2977                                    i);
2978                         if (adapter->rx_scrq[i]->irq) {
2979                                 free_irq(adapter->rx_scrq[i]->irq,
2980                                          adapter->rx_scrq[i]);
2981                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2982                                 adapter->rx_scrq[i]->irq = 0;
2983                         }
2984
2985                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2986                                               do_h_free);
2987                 }
2988
2989                 kfree(adapter->rx_scrq);
2990                 adapter->rx_scrq = NULL;
2991                 adapter->num_active_rx_scrqs = 0;
2992         }
2993 }
2994
2995 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2996                             struct ibmvnic_sub_crq_queue *scrq)
2997 {
2998         struct device *dev = &adapter->vdev->dev;
2999         unsigned long rc;
3000
3001         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3002                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3003         if (rc)
3004                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
3005                         scrq->hw_irq, rc);
3006         return rc;
3007 }
3008
3009 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
3010                            struct ibmvnic_sub_crq_queue *scrq)
3011 {
3012         struct device *dev = &adapter->vdev->dev;
3013         unsigned long rc;
3014
3015         if (scrq->hw_irq > 0x100000000ULL) {
3016                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
3017                 return 1;
3018         }
3019
3020         if (test_bit(0, &adapter->resetting) &&
3021             adapter->reset_reason == VNIC_RESET_MOBILITY) {
3022                 u64 val = (0xff000000) | scrq->hw_irq;
3023
3024                 rc = plpar_hcall_norets(H_EOI, val);
3025                 /* H_EOI would fail with rc = H_FUNCTION when running
3026                  * in XIVE mode which is expected, but not an error.
3027                  */
3028                 if (rc && (rc != H_FUNCTION))
3029                         dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
3030                                 val, rc);
3031         }
3032
3033         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3034                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
3035         if (rc)
3036                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
3037                         scrq->hw_irq, rc);
3038         return rc;
3039 }
3040
3041 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
3042                                struct ibmvnic_sub_crq_queue *scrq)
3043 {
3044         struct device *dev = &adapter->vdev->dev;
3045         struct ibmvnic_tx_pool *tx_pool;
3046         struct ibmvnic_tx_buff *txbuff;
3047         union sub_crq *next;
3048         int index;
3049         int i, j;
3050
3051 restart_loop:
3052         while (pending_scrq(adapter, scrq)) {
3053                 unsigned int pool = scrq->pool_index;
3054                 int num_entries = 0;
3055
3056                 next = ibmvnic_next_scrq(adapter, scrq);
3057                 for (i = 0; i < next->tx_comp.num_comps; i++) {
3058                         if (next->tx_comp.rcs[i]) {
3059                                 dev_err(dev, "tx error %x\n",
3060                                         next->tx_comp.rcs[i]);
3061                                 continue;
3062                         }
3063                         index = be32_to_cpu(next->tx_comp.correlators[i]);
3064                         if (index & IBMVNIC_TSO_POOL_MASK) {
3065                                 tx_pool = &adapter->tso_pool[pool];
3066                                 index &= ~IBMVNIC_TSO_POOL_MASK;
3067                         } else {
3068                                 tx_pool = &adapter->tx_pool[pool];
3069                         }
3070
3071                         txbuff = &tx_pool->tx_buff[index];
3072
3073                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
3074                                 if (!txbuff->data_dma[j])
3075                                         continue;
3076
3077                                 txbuff->data_dma[j] = 0;
3078                         }
3079
3080                         if (txbuff->last_frag) {
3081                                 dev_kfree_skb_any(txbuff->skb);
3082                                 txbuff->skb = NULL;
3083                         }
3084
3085                         num_entries += txbuff->num_entries;
3086
3087                         tx_pool->free_map[tx_pool->producer_index] = index;
3088                         tx_pool->producer_index =
3089                                 (tx_pool->producer_index + 1) %
3090                                         tx_pool->num_buffers;
3091                 }
3092                 /* remove tx_comp scrq*/
3093                 next->tx_comp.first = 0;
3094
3095                 if (atomic_sub_return(num_entries, &scrq->used) <=
3096                     (adapter->req_tx_entries_per_subcrq / 2) &&
3097                     __netif_subqueue_stopped(adapter->netdev,
3098                                              scrq->pool_index)) {
3099                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
3100                         netdev_dbg(adapter->netdev, "Started queue %d\n",
3101                                    scrq->pool_index);
3102                 }
3103         }
3104
3105         enable_scrq_irq(adapter, scrq);
3106
3107         if (pending_scrq(adapter, scrq)) {
3108                 disable_scrq_irq(adapter, scrq);
3109                 goto restart_loop;
3110         }
3111
3112         return 0;
3113 }
3114
3115 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
3116 {
3117         struct ibmvnic_sub_crq_queue *scrq = instance;
3118         struct ibmvnic_adapter *adapter = scrq->adapter;
3119
3120         disable_scrq_irq(adapter, scrq);
3121         ibmvnic_complete_tx(adapter, scrq);
3122
3123         return IRQ_HANDLED;
3124 }
3125
3126 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
3127 {
3128         struct ibmvnic_sub_crq_queue *scrq = instance;
3129         struct ibmvnic_adapter *adapter = scrq->adapter;
3130
3131         /* When booting a kdump kernel we can hit pending interrupts
3132          * prior to completing driver initialization.
3133          */
3134         if (unlikely(adapter->state != VNIC_OPEN))
3135                 return IRQ_NONE;
3136
3137         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
3138
3139         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
3140                 disable_scrq_irq(adapter, scrq);
3141                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
3142         }
3143
3144         return IRQ_HANDLED;
3145 }
3146
3147 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
3148 {
3149         struct device *dev = &adapter->vdev->dev;
3150         struct ibmvnic_sub_crq_queue *scrq;
3151         int i = 0, j = 0;
3152         int rc = 0;
3153
3154         for (i = 0; i < adapter->req_tx_queues; i++) {
3155                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
3156                            i);
3157                 scrq = adapter->tx_scrq[i];
3158                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3159
3160                 if (!scrq->irq) {
3161                         rc = -EINVAL;
3162                         dev_err(dev, "Error mapping irq\n");
3163                         goto req_tx_irq_failed;
3164                 }
3165
3166                 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
3167                          adapter->vdev->unit_address, i);
3168                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
3169                                  0, scrq->name, scrq);
3170
3171                 if (rc) {
3172                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
3173                                 scrq->irq, rc);
3174                         irq_dispose_mapping(scrq->irq);
3175                         goto req_tx_irq_failed;
3176                 }
3177         }
3178
3179         for (i = 0; i < adapter->req_rx_queues; i++) {
3180                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
3181                            i);
3182                 scrq = adapter->rx_scrq[i];
3183                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
3184                 if (!scrq->irq) {
3185                         rc = -EINVAL;
3186                         dev_err(dev, "Error mapping irq\n");
3187                         goto req_rx_irq_failed;
3188                 }
3189                 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
3190                          adapter->vdev->unit_address, i);
3191                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
3192                                  0, scrq->name, scrq);
3193                 if (rc) {
3194                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
3195                                 scrq->irq, rc);
3196                         irq_dispose_mapping(scrq->irq);
3197                         goto req_rx_irq_failed;
3198                 }
3199         }
3200         return rc;
3201
3202 req_rx_irq_failed:
3203         for (j = 0; j < i; j++) {
3204                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
3205                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
3206         }
3207         i = adapter->req_tx_queues;
3208 req_tx_irq_failed:
3209         for (j = 0; j < i; j++) {
3210                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
3211                 irq_dispose_mapping(adapter->tx_scrq[j]->irq);
3212         }
3213         release_sub_crqs(adapter, 1);
3214         return rc;
3215 }
3216
3217 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
3218 {
3219         struct device *dev = &adapter->vdev->dev;
3220         struct ibmvnic_sub_crq_queue **allqueues;
3221         int registered_queues = 0;
3222         int total_queues;
3223         int more = 0;
3224         int i;
3225
3226         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
3227
3228         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
3229         if (!allqueues)
3230                 return -1;
3231
3232         for (i = 0; i < total_queues; i++) {
3233                 allqueues[i] = init_sub_crq_queue(adapter);
3234                 if (!allqueues[i]) {
3235                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
3236                         break;
3237                 }
3238                 registered_queues++;
3239         }
3240
3241         /* Make sure we were able to register the minimum number of queues */
3242         if (registered_queues <
3243             adapter->min_tx_queues + adapter->min_rx_queues) {
3244                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
3245                 goto tx_failed;
3246         }
3247
3248         /* Distribute the failed allocated queues*/
3249         for (i = 0; i < total_queues - registered_queues + more ; i++) {
3250                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
3251                 switch (i % 3) {
3252                 case 0:
3253                         if (adapter->req_rx_queues > adapter->min_rx_queues)
3254                                 adapter->req_rx_queues--;
3255                         else
3256                                 more++;
3257                         break;
3258                 case 1:
3259                         if (adapter->req_tx_queues > adapter->min_tx_queues)
3260                                 adapter->req_tx_queues--;
3261                         else
3262                                 more++;
3263                         break;
3264                 }
3265         }
3266
3267         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
3268                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
3269         if (!adapter->tx_scrq)
3270                 goto tx_failed;
3271
3272         for (i = 0; i < adapter->req_tx_queues; i++) {
3273                 adapter->tx_scrq[i] = allqueues[i];
3274                 adapter->tx_scrq[i]->pool_index = i;
3275                 adapter->num_active_tx_scrqs++;
3276         }
3277
3278         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
3279                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
3280         if (!adapter->rx_scrq)
3281                 goto rx_failed;
3282
3283         for (i = 0; i < adapter->req_rx_queues; i++) {
3284                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3285                 adapter->rx_scrq[i]->scrq_num = i;
3286                 adapter->num_active_rx_scrqs++;
3287         }
3288
3289         kfree(allqueues);
3290         return 0;
3291
3292 rx_failed:
3293         kfree(adapter->tx_scrq);
3294         adapter->tx_scrq = NULL;
3295 tx_failed:
3296         for (i = 0; i < registered_queues; i++)
3297                 release_sub_crq_queue(adapter, allqueues[i], 1);
3298         kfree(allqueues);
3299         return -1;
3300 }
3301
3302 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
3303 {
3304         struct device *dev = &adapter->vdev->dev;
3305         union ibmvnic_crq crq;
3306         int max_entries;
3307
3308         if (!retry) {
3309                 /* Sub-CRQ entries are 32 byte long */
3310                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3311
3312                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3313                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
3314                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3315                         return;
3316                 }
3317
3318                 if (adapter->desired.mtu)
3319                         adapter->req_mtu = adapter->desired.mtu;
3320                 else
3321                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3322
3323                 if (!adapter->desired.tx_entries)
3324                         adapter->desired.tx_entries =
3325                                         adapter->max_tx_entries_per_subcrq;
3326                 if (!adapter->desired.rx_entries)
3327                         adapter->desired.rx_entries =
3328                                         adapter->max_rx_add_entries_per_subcrq;
3329
3330                 max_entries = IBMVNIC_MAX_LTB_SIZE /
3331                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3332
3333                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3334                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3335                         adapter->desired.tx_entries = max_entries;
3336                 }
3337
3338                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3339                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3340                         adapter->desired.rx_entries = max_entries;
3341                 }
3342
3343                 if (adapter->desired.tx_entries)
3344                         adapter->req_tx_entries_per_subcrq =
3345                                         adapter->desired.tx_entries;
3346                 else
3347                         adapter->req_tx_entries_per_subcrq =
3348                                         adapter->max_tx_entries_per_subcrq;
3349
3350                 if (adapter->desired.rx_entries)
3351                         adapter->req_rx_add_entries_per_subcrq =
3352                                         adapter->desired.rx_entries;
3353                 else
3354                         adapter->req_rx_add_entries_per_subcrq =
3355                                         adapter->max_rx_add_entries_per_subcrq;
3356
3357                 if (adapter->desired.tx_queues)
3358                         adapter->req_tx_queues =
3359                                         adapter->desired.tx_queues;
3360                 else
3361                         adapter->req_tx_queues =
3362                                         adapter->opt_tx_comp_sub_queues;
3363
3364                 if (adapter->desired.rx_queues)
3365                         adapter->req_rx_queues =
3366                                         adapter->desired.rx_queues;
3367                 else
3368                         adapter->req_rx_queues =
3369                                         adapter->opt_rx_comp_queues;
3370
3371                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3372         }
3373
3374         memset(&crq, 0, sizeof(crq));
3375         crq.request_capability.first = IBMVNIC_CRQ_CMD;
3376         crq.request_capability.cmd = REQUEST_CAPABILITY;
3377
3378         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3379         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3380         atomic_inc(&adapter->running_cap_crqs);
3381         ibmvnic_send_crq(adapter, &crq);
3382
3383         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3384         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3385         atomic_inc(&adapter->running_cap_crqs);
3386         ibmvnic_send_crq(adapter, &crq);
3387
3388         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3389         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3390         atomic_inc(&adapter->running_cap_crqs);
3391         ibmvnic_send_crq(adapter, &crq);
3392
3393         crq.request_capability.capability =
3394             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3395         crq.request_capability.number =
3396             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3397         atomic_inc(&adapter->running_cap_crqs);
3398         ibmvnic_send_crq(adapter, &crq);
3399
3400         crq.request_capability.capability =
3401             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3402         crq.request_capability.number =
3403             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3404         atomic_inc(&adapter->running_cap_crqs);
3405         ibmvnic_send_crq(adapter, &crq);
3406
3407         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3408         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3409         atomic_inc(&adapter->running_cap_crqs);
3410         ibmvnic_send_crq(adapter, &crq);
3411
3412         if (adapter->netdev->flags & IFF_PROMISC) {
3413                 if (adapter->promisc_supported) {
3414                         crq.request_capability.capability =
3415                             cpu_to_be16(PROMISC_REQUESTED);
3416                         crq.request_capability.number = cpu_to_be64(1);
3417                         atomic_inc(&adapter->running_cap_crqs);
3418                         ibmvnic_send_crq(adapter, &crq);
3419                 }
3420         } else {
3421                 crq.request_capability.capability =
3422                     cpu_to_be16(PROMISC_REQUESTED);
3423                 crq.request_capability.number = cpu_to_be64(0);
3424                 atomic_inc(&adapter->running_cap_crqs);
3425                 ibmvnic_send_crq(adapter, &crq);
3426         }
3427 }
3428
3429 static int pending_scrq(struct ibmvnic_adapter *adapter,
3430                         struct ibmvnic_sub_crq_queue *scrq)
3431 {
3432         union sub_crq *entry = &scrq->msgs[scrq->cur];
3433
3434         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3435                 return 1;
3436         else
3437                 return 0;
3438 }
3439
3440 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3441                                         struct ibmvnic_sub_crq_queue *scrq)
3442 {
3443         union sub_crq *entry;
3444         unsigned long flags;
3445
3446         spin_lock_irqsave(&scrq->lock, flags);
3447         entry = &scrq->msgs[scrq->cur];
3448         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3449                 if (++scrq->cur == scrq->size)
3450                         scrq->cur = 0;
3451         } else {
3452                 entry = NULL;
3453         }
3454         spin_unlock_irqrestore(&scrq->lock, flags);
3455
3456         return entry;
3457 }
3458
3459 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3460 {
3461         struct ibmvnic_crq_queue *queue = &adapter->crq;
3462         union ibmvnic_crq *crq;
3463
3464         crq = &queue->msgs[queue->cur];
3465         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3466                 if (++queue->cur == queue->size)
3467                         queue->cur = 0;
3468         } else {
3469                 crq = NULL;
3470         }
3471
3472         return crq;
3473 }
3474
3475 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3476 {
3477         switch (rc) {
3478         case H_PARAMETER:
3479                 dev_warn_ratelimited(dev,
3480                                      "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3481                                      func, rc);
3482                 break;
3483         case H_CLOSED:
3484                 dev_warn_ratelimited(dev,
3485                                      "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3486                                      func, rc);
3487                 break;
3488         default:
3489                 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3490                 break;
3491         }
3492 }
3493
3494 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3495                        union sub_crq *sub_crq)
3496 {
3497         unsigned int ua = adapter->vdev->unit_address;
3498         struct device *dev = &adapter->vdev->dev;
3499         u64 *u64_crq = (u64 *)sub_crq;
3500         int rc;
3501
3502         netdev_dbg(adapter->netdev,
3503                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3504                    (unsigned long int)cpu_to_be64(remote_handle),
3505                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3506                    (unsigned long int)cpu_to_be64(u64_crq[1]),
3507                    (unsigned long int)cpu_to_be64(u64_crq[2]),
3508                    (unsigned long int)cpu_to_be64(u64_crq[3]));
3509
3510         /* Make sure the hypervisor sees the complete request */
3511         mb();
3512
3513         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3514                                 cpu_to_be64(remote_handle),
3515                                 cpu_to_be64(u64_crq[0]),
3516                                 cpu_to_be64(u64_crq[1]),
3517                                 cpu_to_be64(u64_crq[2]),
3518                                 cpu_to_be64(u64_crq[3]));
3519
3520         if (rc)
3521                 print_subcrq_error(dev, rc, __func__);
3522
3523         return rc;
3524 }
3525
3526 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3527                                 u64 remote_handle, u64 ioba, u64 num_entries)
3528 {
3529         unsigned int ua = adapter->vdev->unit_address;
3530         struct device *dev = &adapter->vdev->dev;
3531         int rc;
3532
3533         /* Make sure the hypervisor sees the complete request */
3534         mb();
3535         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3536                                 cpu_to_be64(remote_handle),
3537                                 ioba, num_entries);
3538
3539         if (rc)
3540                 print_subcrq_error(dev, rc, __func__);
3541
3542         return rc;
3543 }
3544
3545 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3546                             union ibmvnic_crq *crq)
3547 {
3548         unsigned int ua = adapter->vdev->unit_address;
3549         struct device *dev = &adapter->vdev->dev;
3550         u64 *u64_crq = (u64 *)crq;
3551         int rc;
3552
3553         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3554                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3555                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3556
3557         if (!adapter->crq.active &&
3558             crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3559                 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3560                 return -EINVAL;
3561         }
3562
3563         /* Make sure the hypervisor sees the complete request */
3564         mb();
3565
3566         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3567                                 cpu_to_be64(u64_crq[0]),
3568                                 cpu_to_be64(u64_crq[1]));
3569
3570         if (rc) {
3571                 if (rc == H_CLOSED) {
3572                         dev_warn(dev, "CRQ Queue closed\n");
3573                         /* do not reset, report the fail, wait for passive init from server */
3574                 }
3575
3576                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3577         }
3578
3579         return rc;
3580 }
3581
3582 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3583 {
3584         struct device *dev = &adapter->vdev->dev;
3585         union ibmvnic_crq crq;
3586         int retries = 100;
3587         int rc;
3588
3589         memset(&crq, 0, sizeof(crq));
3590         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3591         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3592         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3593
3594         do {
3595                 rc = ibmvnic_send_crq(adapter, &crq);
3596                 if (rc != H_CLOSED)
3597                         break;
3598                 retries--;
3599                 msleep(50);
3600
3601         } while (retries > 0);
3602
3603         if (rc) {
3604                 dev_err(dev, "Failed to send init request, rc = %d\n", rc);
3605                 return rc;
3606         }
3607
3608         return 0;
3609 }
3610
3611 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3612 {
3613         union ibmvnic_crq crq;
3614
3615         memset(&crq, 0, sizeof(crq));
3616         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3617         crq.version_exchange.cmd = VERSION_EXCHANGE;
3618         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3619
3620         return ibmvnic_send_crq(adapter, &crq);
3621 }
3622
3623 struct vnic_login_client_data {
3624         u8      type;
3625         __be16  len;
3626         char    name[];
3627 } __packed;
3628
3629 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3630 {
3631         int len;
3632
3633         /* Calculate the amount of buffer space needed for the
3634          * vnic client data in the login buffer. There are four entries,
3635          * OS name, LPAR name, device name, and a null last entry.
3636          */
3637         len = 4 * sizeof(struct vnic_login_client_data);
3638         len += 6; /* "Linux" plus NULL */
3639         len += strlen(utsname()->nodename) + 1;
3640         len += strlen(adapter->netdev->name) + 1;
3641
3642         return len;
3643 }
3644
3645 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3646                                  struct vnic_login_client_data *vlcd)
3647 {
3648         const char *os_name = "Linux";
3649         int len;
3650
3651         /* Type 1 - LPAR OS */
3652         vlcd->type = 1;
3653         len = strlen(os_name) + 1;
3654         vlcd->len = cpu_to_be16(len);
3655         strncpy(vlcd->name, os_name, len);
3656         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3657
3658         /* Type 2 - LPAR name */
3659         vlcd->type = 2;
3660         len = strlen(utsname()->nodename) + 1;
3661         vlcd->len = cpu_to_be16(len);
3662         strncpy(vlcd->name, utsname()->nodename, len);
3663         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3664
3665         /* Type 3 - device name */
3666         vlcd->type = 3;
3667         len = strlen(adapter->netdev->name) + 1;
3668         vlcd->len = cpu_to_be16(len);
3669         strncpy(vlcd->name, adapter->netdev->name, len);
3670 }
3671
3672 static int send_login(struct ibmvnic_adapter *adapter)
3673 {
3674         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3675         struct ibmvnic_login_buffer *login_buffer;
3676         struct device *dev = &adapter->vdev->dev;
3677         dma_addr_t rsp_buffer_token;
3678         dma_addr_t buffer_token;
3679         size_t rsp_buffer_size;
3680         union ibmvnic_crq crq;
3681         size_t buffer_size;
3682         __be64 *tx_list_p;
3683         __be64 *rx_list_p;
3684         int client_data_len;
3685         struct vnic_login_client_data *vlcd;
3686         int i;
3687
3688         if (!adapter->tx_scrq || !adapter->rx_scrq) {
3689                 netdev_err(adapter->netdev,
3690                            "RX or TX queues are not allocated, device login failed\n");
3691                 return -1;
3692         }
3693
3694         release_login_rsp_buffer(adapter);
3695         client_data_len = vnic_client_data_len(adapter);
3696
3697         buffer_size =
3698             sizeof(struct ibmvnic_login_buffer) +
3699             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3700             client_data_len;
3701
3702         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3703         if (!login_buffer)
3704                 goto buf_alloc_failed;
3705
3706         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3707                                       DMA_TO_DEVICE);
3708         if (dma_mapping_error(dev, buffer_token)) {
3709                 dev_err(dev, "Couldn't map login buffer\n");
3710                 goto buf_map_failed;
3711         }
3712
3713         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3714                           sizeof(u64) * adapter->req_tx_queues +
3715                           sizeof(u64) * adapter->req_rx_queues +
3716                           sizeof(u64) * adapter->req_rx_queues +
3717                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3718
3719         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3720         if (!login_rsp_buffer)
3721                 goto buf_rsp_alloc_failed;
3722
3723         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3724                                           rsp_buffer_size, DMA_FROM_DEVICE);
3725         if (dma_mapping_error(dev, rsp_buffer_token)) {
3726                 dev_err(dev, "Couldn't map login rsp buffer\n");
3727                 goto buf_rsp_map_failed;
3728         }
3729
3730         adapter->login_buf = login_buffer;
3731         adapter->login_buf_token = buffer_token;
3732         adapter->login_buf_sz = buffer_size;
3733         adapter->login_rsp_buf = login_rsp_buffer;
3734         adapter->login_rsp_buf_token = rsp_buffer_token;
3735         adapter->login_rsp_buf_sz = rsp_buffer_size;
3736
3737         login_buffer->len = cpu_to_be32(buffer_size);
3738         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3739         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3740         login_buffer->off_txcomp_subcrqs =
3741             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3742         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3743         login_buffer->off_rxcomp_subcrqs =
3744             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3745                         sizeof(u64) * adapter->req_tx_queues);
3746         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3747         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3748
3749         tx_list_p = (__be64 *)((char *)login_buffer +
3750                                       sizeof(struct ibmvnic_login_buffer));
3751         rx_list_p = (__be64 *)((char *)login_buffer +
3752                                       sizeof(struct ibmvnic_login_buffer) +
3753                                       sizeof(u64) * adapter->req_tx_queues);
3754
3755         for (i = 0; i < adapter->req_tx_queues; i++) {
3756                 if (adapter->tx_scrq[i]) {
3757                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3758                                                    crq_num);
3759                 }
3760         }
3761
3762         for (i = 0; i < adapter->req_rx_queues; i++) {
3763                 if (adapter->rx_scrq[i]) {
3764                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3765                                                    crq_num);
3766                 }
3767         }
3768
3769         /* Insert vNIC login client data */
3770         vlcd = (struct vnic_login_client_data *)
3771                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3772         login_buffer->client_data_offset =
3773                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3774         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3775
3776         vnic_add_client_data(adapter, vlcd);
3777
3778         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3779         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3780                 netdev_dbg(adapter->netdev, "%016lx\n",
3781                            ((unsigned long int *)(adapter->login_buf))[i]);
3782         }
3783
3784         memset(&crq, 0, sizeof(crq));
3785         crq.login.first = IBMVNIC_CRQ_CMD;
3786         crq.login.cmd = LOGIN;
3787         crq.login.ioba = cpu_to_be32(buffer_token);
3788         crq.login.len = cpu_to_be32(buffer_size);
3789         ibmvnic_send_crq(adapter, &crq);
3790
3791         return 0;
3792
3793 buf_rsp_map_failed:
3794         kfree(login_rsp_buffer);
3795 buf_rsp_alloc_failed:
3796         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3797 buf_map_failed:
3798         kfree(login_buffer);
3799 buf_alloc_failed:
3800         return -1;
3801 }
3802
3803 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3804                             u32 len, u8 map_id)
3805 {
3806         union ibmvnic_crq crq;
3807
3808         memset(&crq, 0, sizeof(crq));
3809         crq.request_map.first = IBMVNIC_CRQ_CMD;
3810         crq.request_map.cmd = REQUEST_MAP;
3811         crq.request_map.map_id = map_id;
3812         crq.request_map.ioba = cpu_to_be32(addr);
3813         crq.request_map.len = cpu_to_be32(len);
3814         return ibmvnic_send_crq(adapter, &crq);
3815 }
3816
3817 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3818 {
3819         union ibmvnic_crq crq;
3820
3821         memset(&crq, 0, sizeof(crq));
3822         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3823         crq.request_unmap.cmd = REQUEST_UNMAP;
3824         crq.request_unmap.map_id = map_id;
3825         return ibmvnic_send_crq(adapter, &crq);
3826 }
3827
3828 static void send_query_map(struct ibmvnic_adapter *adapter)
3829 {
3830         union ibmvnic_crq crq;
3831
3832         memset(&crq, 0, sizeof(crq));
3833         crq.query_map.first = IBMVNIC_CRQ_CMD;
3834         crq.query_map.cmd = QUERY_MAP;
3835         ibmvnic_send_crq(adapter, &crq);
3836 }
3837
3838 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3839 static void send_query_cap(struct ibmvnic_adapter *adapter)
3840 {
3841         union ibmvnic_crq crq;
3842
3843         atomic_set(&adapter->running_cap_crqs, 0);
3844         memset(&crq, 0, sizeof(crq));
3845         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3846         crq.query_capability.cmd = QUERY_CAPABILITY;
3847
3848         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3849         atomic_inc(&adapter->running_cap_crqs);
3850         ibmvnic_send_crq(adapter, &crq);
3851
3852         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3853         atomic_inc(&adapter->running_cap_crqs);
3854         ibmvnic_send_crq(adapter, &crq);
3855
3856         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3857         atomic_inc(&adapter->running_cap_crqs);
3858         ibmvnic_send_crq(adapter, &crq);
3859
3860         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3861         atomic_inc(&adapter->running_cap_crqs);
3862         ibmvnic_send_crq(adapter, &crq);
3863
3864         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3865         atomic_inc(&adapter->running_cap_crqs);
3866         ibmvnic_send_crq(adapter, &crq);
3867
3868         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3869         atomic_inc(&adapter->running_cap_crqs);
3870         ibmvnic_send_crq(adapter, &crq);
3871
3872         crq.query_capability.capability =
3873             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3874         atomic_inc(&adapter->running_cap_crqs);
3875         ibmvnic_send_crq(adapter, &crq);
3876
3877         crq.query_capability.capability =
3878             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3879         atomic_inc(&adapter->running_cap_crqs);
3880         ibmvnic_send_crq(adapter, &crq);
3881
3882         crq.query_capability.capability =
3883             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3884         atomic_inc(&adapter->running_cap_crqs);
3885         ibmvnic_send_crq(adapter, &crq);
3886
3887         crq.query_capability.capability =
3888             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3889         atomic_inc(&adapter->running_cap_crqs);
3890         ibmvnic_send_crq(adapter, &crq);
3891
3892         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3893         atomic_inc(&adapter->running_cap_crqs);
3894         ibmvnic_send_crq(adapter, &crq);
3895
3896         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3897         atomic_inc(&adapter->running_cap_crqs);
3898         ibmvnic_send_crq(adapter, &crq);
3899
3900         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3901         atomic_inc(&adapter->running_cap_crqs);
3902         ibmvnic_send_crq(adapter, &crq);
3903
3904         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3905         atomic_inc(&adapter->running_cap_crqs);
3906         ibmvnic_send_crq(adapter, &crq);
3907
3908         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3909         atomic_inc(&adapter->running_cap_crqs);
3910         ibmvnic_send_crq(adapter, &crq);
3911
3912         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3913         atomic_inc(&adapter->running_cap_crqs);
3914         ibmvnic_send_crq(adapter, &crq);
3915
3916         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3917         atomic_inc(&adapter->running_cap_crqs);
3918         ibmvnic_send_crq(adapter, &crq);
3919
3920         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3921         atomic_inc(&adapter->running_cap_crqs);
3922         ibmvnic_send_crq(adapter, &crq);
3923
3924         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3925         atomic_inc(&adapter->running_cap_crqs);
3926         ibmvnic_send_crq(adapter, &crq);
3927
3928         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3929         atomic_inc(&adapter->running_cap_crqs);
3930         ibmvnic_send_crq(adapter, &crq);
3931
3932         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3933         atomic_inc(&adapter->running_cap_crqs);
3934         ibmvnic_send_crq(adapter, &crq);
3935
3936         crq.query_capability.capability =
3937                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3938         atomic_inc(&adapter->running_cap_crqs);
3939         ibmvnic_send_crq(adapter, &crq);
3940
3941         crq.query_capability.capability =
3942                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3943         atomic_inc(&adapter->running_cap_crqs);
3944         ibmvnic_send_crq(adapter, &crq);
3945
3946         crq.query_capability.capability =
3947                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3948         atomic_inc(&adapter->running_cap_crqs);
3949         ibmvnic_send_crq(adapter, &crq);
3950
3951         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3952         atomic_inc(&adapter->running_cap_crqs);
3953         ibmvnic_send_crq(adapter, &crq);
3954 }
3955
3956 static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
3957 {
3958         int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3959         struct device *dev = &adapter->vdev->dev;
3960         union ibmvnic_crq crq;
3961
3962         adapter->ip_offload_tok =
3963                 dma_map_single(dev,
3964                                &adapter->ip_offload_buf,
3965                                buf_sz,
3966                                DMA_FROM_DEVICE);
3967
3968         if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3969                 if (!firmware_has_feature(FW_FEATURE_CMO))
3970                         dev_err(dev, "Couldn't map offload buffer\n");
3971                 return;
3972         }
3973
3974         memset(&crq, 0, sizeof(crq));
3975         crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3976         crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3977         crq.query_ip_offload.len = cpu_to_be32(buf_sz);
3978         crq.query_ip_offload.ioba =
3979             cpu_to_be32(adapter->ip_offload_tok);
3980
3981         ibmvnic_send_crq(adapter, &crq);
3982 }
3983
3984 static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
3985 {
3986         struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
3987         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3988         struct device *dev = &adapter->vdev->dev;
3989         netdev_features_t old_hw_features = 0;
3990         union ibmvnic_crq crq;
3991
3992         adapter->ip_offload_ctrl_tok =
3993                 dma_map_single(dev,
3994                                ctrl_buf,
3995                                sizeof(adapter->ip_offload_ctrl),
3996                                DMA_TO_DEVICE);
3997
3998         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3999                 dev_err(dev, "Couldn't map ip offload control buffer\n");
4000                 return;
4001         }
4002
4003         ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4004         ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
4005         ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
4006         ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
4007         ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
4008         ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
4009         ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
4010         ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
4011         ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
4012         ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
4013
4014         /* large_rx disabled for now, additional features needed */
4015         ctrl_buf->large_rx_ipv4 = 0;
4016         ctrl_buf->large_rx_ipv6 = 0;
4017
4018         if (adapter->state != VNIC_PROBING) {
4019                 old_hw_features = adapter->netdev->hw_features;
4020                 adapter->netdev->hw_features = 0;
4021         }
4022
4023         adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
4024
4025         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
4026                 adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
4027
4028         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
4029                 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
4030
4031         if ((adapter->netdev->features &
4032             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
4033                 adapter->netdev->hw_features |= NETIF_F_RXCSUM;
4034
4035         if (buf->large_tx_ipv4)
4036                 adapter->netdev->hw_features |= NETIF_F_TSO;
4037         if (buf->large_tx_ipv6)
4038                 adapter->netdev->hw_features |= NETIF_F_TSO6;
4039
4040         if (adapter->state == VNIC_PROBING) {
4041                 adapter->netdev->features |= adapter->netdev->hw_features;
4042         } else if (old_hw_features != adapter->netdev->hw_features) {
4043                 netdev_features_t tmp = 0;
4044
4045                 /* disable features no longer supported */
4046                 adapter->netdev->features &= adapter->netdev->hw_features;
4047                 /* turn on features now supported if previously enabled */
4048                 tmp = (old_hw_features ^ adapter->netdev->hw_features) &
4049                         adapter->netdev->hw_features;
4050                 adapter->netdev->features |=
4051                                 tmp & adapter->netdev->wanted_features;
4052         }
4053
4054         memset(&crq, 0, sizeof(crq));
4055         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
4056         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
4057         crq.control_ip_offload.len =
4058             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
4059         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
4060         ibmvnic_send_crq(adapter, &crq);
4061 }
4062
4063 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
4064                                 struct ibmvnic_adapter *adapter)
4065 {
4066         struct device *dev = &adapter->vdev->dev;
4067
4068         if (crq->get_vpd_size_rsp.rc.code) {
4069                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
4070                         crq->get_vpd_size_rsp.rc.code);
4071                 complete(&adapter->fw_done);
4072                 return;
4073         }
4074
4075         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
4076         complete(&adapter->fw_done);
4077 }
4078
4079 static void handle_vpd_rsp(union ibmvnic_crq *crq,
4080                            struct ibmvnic_adapter *adapter)
4081 {
4082         struct device *dev = &adapter->vdev->dev;
4083         unsigned char *substr = NULL;
4084         u8 fw_level_len = 0;
4085
4086         memset(adapter->fw_version, 0, 32);
4087
4088         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
4089                          DMA_FROM_DEVICE);
4090
4091         if (crq->get_vpd_rsp.rc.code) {
4092                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
4093                         crq->get_vpd_rsp.rc.code);
4094                 goto complete;
4095         }
4096
4097         /* get the position of the firmware version info
4098          * located after the ASCII 'RM' substring in the buffer
4099          */
4100         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
4101         if (!substr) {
4102                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
4103                 goto complete;
4104         }
4105
4106         /* get length of firmware level ASCII substring */
4107         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
4108                 fw_level_len = *(substr + 2);
4109         } else {
4110                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
4111                 goto complete;
4112         }
4113
4114         /* copy firmware version string from vpd into adapter */
4115         if ((substr + 3 + fw_level_len) <
4116             (adapter->vpd->buff + adapter->vpd->len)) {
4117                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
4118         } else {
4119                 dev_info(dev, "FW substr extrapolated VPD buff\n");
4120         }
4121
4122 complete:
4123         if (adapter->fw_version[0] == '\0')
4124                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
4125         complete(&adapter->fw_done);
4126 }
4127
4128 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
4129 {
4130         struct device *dev = &adapter->vdev->dev;
4131         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
4132         int i;
4133
4134         dma_unmap_single(dev, adapter->ip_offload_tok,
4135                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
4136
4137         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
4138         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
4139                 netdev_dbg(adapter->netdev, "%016lx\n",
4140                            ((unsigned long int *)(buf))[i]);
4141
4142         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
4143         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
4144         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
4145                    buf->tcp_ipv4_chksum);
4146         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
4147                    buf->tcp_ipv6_chksum);
4148         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
4149                    buf->udp_ipv4_chksum);
4150         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
4151                    buf->udp_ipv6_chksum);
4152         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
4153                    buf->large_tx_ipv4);
4154         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
4155                    buf->large_tx_ipv6);
4156         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
4157                    buf->large_rx_ipv4);
4158         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
4159                    buf->large_rx_ipv6);
4160         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
4161                    buf->max_ipv4_header_size);
4162         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
4163                    buf->max_ipv6_header_size);
4164         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
4165                    buf->max_tcp_header_size);
4166         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
4167                    buf->max_udp_header_size);
4168         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
4169                    buf->max_large_tx_size);
4170         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
4171                    buf->max_large_rx_size);
4172         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
4173                    buf->ipv6_extension_header);
4174         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
4175                    buf->tcp_pseudosum_req);
4176         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
4177                    buf->num_ipv6_ext_headers);
4178         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
4179                    buf->off_ipv6_ext_headers);
4180
4181         send_control_ip_offload(adapter);
4182 }
4183
4184 static const char *ibmvnic_fw_err_cause(u16 cause)
4185 {
4186         switch (cause) {
4187         case ADAPTER_PROBLEM:
4188                 return "adapter problem";
4189         case BUS_PROBLEM:
4190                 return "bus problem";
4191         case FW_PROBLEM:
4192                 return "firmware problem";
4193         case DD_PROBLEM:
4194                 return "device driver problem";
4195         case EEH_RECOVERY:
4196                 return "EEH recovery";
4197         case FW_UPDATED:
4198                 return "firmware updated";
4199         case LOW_MEMORY:
4200                 return "low Memory";
4201         default:
4202                 return "unknown";
4203         }
4204 }
4205
4206 static void handle_error_indication(union ibmvnic_crq *crq,
4207                                     struct ibmvnic_adapter *adapter)
4208 {
4209         struct device *dev = &adapter->vdev->dev;
4210         u16 cause;
4211
4212         cause = be16_to_cpu(crq->error_indication.error_cause);
4213
4214         dev_warn_ratelimited(dev,
4215                              "Firmware reports %serror, cause: %s. Starting recovery...\n",
4216                              crq->error_indication.flags
4217                                 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
4218                              ibmvnic_fw_err_cause(cause));
4219
4220         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
4221                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4222         else
4223                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
4224 }
4225
4226 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
4227                                  struct ibmvnic_adapter *adapter)
4228 {
4229         struct net_device *netdev = adapter->netdev;
4230         struct device *dev = &adapter->vdev->dev;
4231         long rc;
4232
4233         rc = crq->change_mac_addr_rsp.rc.code;
4234         if (rc) {
4235                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
4236                 goto out;
4237         }
4238         /* crq->change_mac_addr.mac_addr is the requested one
4239          * crq->change_mac_addr_rsp.mac_addr is the returned valid one.
4240          */
4241         ether_addr_copy(netdev->dev_addr,
4242                         &crq->change_mac_addr_rsp.mac_addr[0]);
4243         ether_addr_copy(adapter->mac_addr,
4244                         &crq->change_mac_addr_rsp.mac_addr[0]);
4245 out:
4246         complete(&adapter->fw_done);
4247         return rc;
4248 }
4249
4250 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
4251                                    struct ibmvnic_adapter *adapter)
4252 {
4253         struct device *dev = &adapter->vdev->dev;
4254         u64 *req_value;
4255         char *name;
4256
4257         atomic_dec(&adapter->running_cap_crqs);
4258         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
4259         case REQ_TX_QUEUES:
4260                 req_value = &adapter->req_tx_queues;
4261                 name = "tx";
4262                 break;
4263         case REQ_RX_QUEUES:
4264                 req_value = &adapter->req_rx_queues;
4265                 name = "rx";
4266                 break;
4267         case REQ_RX_ADD_QUEUES:
4268                 req_value = &adapter->req_rx_add_queues;
4269                 name = "rx_add";
4270                 break;
4271         case REQ_TX_ENTRIES_PER_SUBCRQ:
4272                 req_value = &adapter->req_tx_entries_per_subcrq;
4273                 name = "tx_entries_per_subcrq";
4274                 break;
4275         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
4276                 req_value = &adapter->req_rx_add_entries_per_subcrq;
4277                 name = "rx_add_entries_per_subcrq";
4278                 break;
4279         case REQ_MTU:
4280                 req_value = &adapter->req_mtu;
4281                 name = "mtu";
4282                 break;
4283         case PROMISC_REQUESTED:
4284                 req_value = &adapter->promisc;
4285                 name = "promisc";
4286                 break;
4287         default:
4288                 dev_err(dev, "Got invalid cap request rsp %d\n",
4289                         crq->request_capability.capability);
4290                 return;
4291         }
4292
4293         switch (crq->request_capability_rsp.rc.code) {
4294         case SUCCESS:
4295                 break;
4296         case PARTIALSUCCESS:
4297                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
4298                          *req_value,
4299                          (long int)be64_to_cpu(crq->request_capability_rsp.
4300                                                number), name);
4301
4302                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
4303                     REQ_MTU) {
4304                         pr_err("mtu of %llu is not supported. Reverting.\n",
4305                                *req_value);
4306                         *req_value = adapter->fallback.mtu;
4307                 } else {
4308                         *req_value =
4309                                 be64_to_cpu(crq->request_capability_rsp.number);
4310                 }
4311
4312                 send_request_cap(adapter, 1);
4313                 return;
4314         default:
4315                 dev_err(dev, "Error %d in request cap rsp\n",
4316                         crq->request_capability_rsp.rc.code);
4317                 return;
4318         }
4319
4320         /* Done receiving requested capabilities, query IP offload support */
4321         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4322                 adapter->wait_capability = false;
4323                 send_query_ip_offload(adapter);
4324         }
4325 }
4326
4327 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
4328                             struct ibmvnic_adapter *adapter)
4329 {
4330         struct device *dev = &adapter->vdev->dev;
4331         struct net_device *netdev = adapter->netdev;
4332         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
4333         struct ibmvnic_login_buffer *login = adapter->login_buf;
4334         u64 *tx_handle_array;
4335         u64 *rx_handle_array;
4336         int num_tx_pools;
4337         int num_rx_pools;
4338         u64 *size_array;
4339         int i;
4340
4341         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4342                          DMA_TO_DEVICE);
4343         dma_unmap_single(dev, adapter->login_rsp_buf_token,
4344                          adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4345
4346         /* If the number of queues requested can't be allocated by the
4347          * server, the login response will return with code 1. We will need
4348          * to resend the login buffer with fewer queues requested.
4349          */
4350         if (login_rsp_crq->generic.rc.code) {
4351                 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4352                 complete(&adapter->init_done);
4353                 return 0;
4354         }
4355
4356         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4357
4358         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4359         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4360                 netdev_dbg(adapter->netdev, "%016lx\n",
4361                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4362         }
4363
4364         /* Sanity checks */
4365         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4366             (be32_to_cpu(login->num_rxcomp_subcrqs) *
4367              adapter->req_rx_add_queues !=
4368              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4369                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4370                 ibmvnic_remove(adapter->vdev);
4371                 return -EIO;
4372         }
4373         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4374                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
4375         /* variable buffer sizes are not supported, so just read the
4376          * first entry.
4377          */
4378         adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
4379
4380         num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
4381         num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4382
4383         tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4384                                   be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
4385         rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4386                                   be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
4387
4388         for (i = 0; i < num_tx_pools; i++)
4389                 adapter->tx_scrq[i]->handle = tx_handle_array[i];
4390
4391         for (i = 0; i < num_rx_pools; i++)
4392                 adapter->rx_scrq[i]->handle = rx_handle_array[i];
4393
4394         adapter->num_active_tx_scrqs = num_tx_pools;
4395         adapter->num_active_rx_scrqs = num_rx_pools;
4396         release_login_rsp_buffer(adapter);
4397         release_login_buffer(adapter);
4398         complete(&adapter->init_done);
4399
4400         return 0;
4401 }
4402
4403 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4404                                      struct ibmvnic_adapter *adapter)
4405 {
4406         struct device *dev = &adapter->vdev->dev;
4407         long rc;
4408
4409         rc = crq->request_unmap_rsp.rc.code;
4410         if (rc)
4411                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4412 }
4413
4414 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4415                                  struct ibmvnic_adapter *adapter)
4416 {
4417         struct net_device *netdev = adapter->netdev;
4418         struct device *dev = &adapter->vdev->dev;
4419         long rc;
4420
4421         rc = crq->query_map_rsp.rc.code;
4422         if (rc) {
4423                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4424                 return;
4425         }
4426         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4427                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4428                    crq->query_map_rsp.free_pages);
4429 }
4430
4431 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4432                                  struct ibmvnic_adapter *adapter)
4433 {
4434         struct net_device *netdev = adapter->netdev;
4435         struct device *dev = &adapter->vdev->dev;
4436         long rc;
4437
4438         atomic_dec(&adapter->running_cap_crqs);
4439         netdev_dbg(netdev, "Outstanding queries: %d\n",
4440                    atomic_read(&adapter->running_cap_crqs));
4441         rc = crq->query_capability.rc.code;
4442         if (rc) {
4443                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4444                 goto out;
4445         }
4446
4447         switch (be16_to_cpu(crq->query_capability.capability)) {
4448         case MIN_TX_QUEUES:
4449                 adapter->min_tx_queues =
4450                     be64_to_cpu(crq->query_capability.number);
4451                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4452                            adapter->min_tx_queues);
4453                 break;
4454         case MIN_RX_QUEUES:
4455                 adapter->min_rx_queues =
4456                     be64_to_cpu(crq->query_capability.number);
4457                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4458                            adapter->min_rx_queues);
4459                 break;
4460         case MIN_RX_ADD_QUEUES:
4461                 adapter->min_rx_add_queues =
4462                     be64_to_cpu(crq->query_capability.number);
4463                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4464                            adapter->min_rx_add_queues);
4465                 break;
4466         case MAX_TX_QUEUES:
4467                 adapter->max_tx_queues =
4468                     be64_to_cpu(crq->query_capability.number);
4469                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4470                            adapter->max_tx_queues);
4471                 break;
4472         case MAX_RX_QUEUES:
4473                 adapter->max_rx_queues =
4474                     be64_to_cpu(crq->query_capability.number);
4475                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4476                            adapter->max_rx_queues);
4477                 break;
4478         case MAX_RX_ADD_QUEUES:
4479                 adapter->max_rx_add_queues =
4480                     be64_to_cpu(crq->query_capability.number);
4481                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4482                            adapter->max_rx_add_queues);
4483                 break;
4484         case MIN_TX_ENTRIES_PER_SUBCRQ:
4485                 adapter->min_tx_entries_per_subcrq =
4486                     be64_to_cpu(crq->query_capability.number);
4487                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4488                            adapter->min_tx_entries_per_subcrq);
4489                 break;
4490         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4491                 adapter->min_rx_add_entries_per_subcrq =
4492                     be64_to_cpu(crq->query_capability.number);
4493                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4494                            adapter->min_rx_add_entries_per_subcrq);
4495                 break;
4496         case MAX_TX_ENTRIES_PER_SUBCRQ:
4497                 adapter->max_tx_entries_per_subcrq =
4498                     be64_to_cpu(crq->query_capability.number);
4499                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4500                            adapter->max_tx_entries_per_subcrq);
4501                 break;
4502         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4503                 adapter->max_rx_add_entries_per_subcrq =
4504                     be64_to_cpu(crq->query_capability.number);
4505                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4506                            adapter->max_rx_add_entries_per_subcrq);
4507                 break;
4508         case TCP_IP_OFFLOAD:
4509                 adapter->tcp_ip_offload =
4510                     be64_to_cpu(crq->query_capability.number);
4511                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4512                            adapter->tcp_ip_offload);
4513                 break;
4514         case PROMISC_SUPPORTED:
4515                 adapter->promisc_supported =
4516                     be64_to_cpu(crq->query_capability.number);
4517                 netdev_dbg(netdev, "promisc_supported = %lld\n",
4518                            adapter->promisc_supported);
4519                 break;
4520         case MIN_MTU:
4521                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4522                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4523                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4524                 break;
4525         case MAX_MTU:
4526                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4527                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4528                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4529                 break;
4530         case MAX_MULTICAST_FILTERS:
4531                 adapter->max_multicast_filters =
4532                     be64_to_cpu(crq->query_capability.number);
4533                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4534                            adapter->max_multicast_filters);
4535                 break;
4536         case VLAN_HEADER_INSERTION:
4537                 adapter->vlan_header_insertion =
4538                     be64_to_cpu(crq->query_capability.number);
4539                 if (adapter->vlan_header_insertion)
4540                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4541                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4542                            adapter->vlan_header_insertion);
4543                 break;
4544         case RX_VLAN_HEADER_INSERTION:
4545                 adapter->rx_vlan_header_insertion =
4546                     be64_to_cpu(crq->query_capability.number);
4547                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4548                            adapter->rx_vlan_header_insertion);
4549                 break;
4550         case MAX_TX_SG_ENTRIES:
4551                 adapter->max_tx_sg_entries =
4552                     be64_to_cpu(crq->query_capability.number);
4553                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4554                            adapter->max_tx_sg_entries);
4555                 break;
4556         case RX_SG_SUPPORTED:
4557                 adapter->rx_sg_supported =
4558                     be64_to_cpu(crq->query_capability.number);
4559                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4560                            adapter->rx_sg_supported);
4561                 break;
4562         case OPT_TX_COMP_SUB_QUEUES:
4563                 adapter->opt_tx_comp_sub_queues =
4564                     be64_to_cpu(crq->query_capability.number);
4565                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4566                            adapter->opt_tx_comp_sub_queues);
4567                 break;
4568         case OPT_RX_COMP_QUEUES:
4569                 adapter->opt_rx_comp_queues =
4570                     be64_to_cpu(crq->query_capability.number);
4571                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4572                            adapter->opt_rx_comp_queues);
4573                 break;
4574         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4575                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4576                     be64_to_cpu(crq->query_capability.number);
4577                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4578                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4579                 break;
4580         case OPT_TX_ENTRIES_PER_SUBCRQ:
4581                 adapter->opt_tx_entries_per_subcrq =
4582                     be64_to_cpu(crq->query_capability.number);
4583                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4584                            adapter->opt_tx_entries_per_subcrq);
4585                 break;
4586         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4587                 adapter->opt_rxba_entries_per_subcrq =
4588                     be64_to_cpu(crq->query_capability.number);
4589                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4590                            adapter->opt_rxba_entries_per_subcrq);
4591                 break;
4592         case TX_RX_DESC_REQ:
4593                 adapter->tx_rx_desc_req = crq->query_capability.number;
4594                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4595                            adapter->tx_rx_desc_req);
4596                 break;
4597
4598         default:
4599                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4600                            crq->query_capability.capability);
4601         }
4602
4603 out:
4604         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4605                 adapter->wait_capability = false;
4606                 send_request_cap(adapter, 0);
4607         }
4608 }
4609
4610 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
4611 {
4612         union ibmvnic_crq crq;
4613         int rc;
4614
4615         memset(&crq, 0, sizeof(crq));
4616         crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
4617         crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
4618
4619         mutex_lock(&adapter->fw_lock);
4620         adapter->fw_done_rc = 0;
4621         reinit_completion(&adapter->fw_done);
4622
4623         rc = ibmvnic_send_crq(adapter, &crq);
4624         if (rc) {
4625                 mutex_unlock(&adapter->fw_lock);
4626                 return rc;
4627         }
4628
4629         rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
4630         if (rc) {
4631                 mutex_unlock(&adapter->fw_lock);
4632                 return rc;
4633         }
4634
4635         mutex_unlock(&adapter->fw_lock);
4636         return adapter->fw_done_rc ? -EIO : 0;
4637 }
4638
4639 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
4640                                        struct ibmvnic_adapter *adapter)
4641 {
4642         struct net_device *netdev = adapter->netdev;
4643         int rc;
4644         __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
4645
4646         rc = crq->query_phys_parms_rsp.rc.code;
4647         if (rc) {
4648                 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
4649                 return rc;
4650         }
4651         switch (rspeed) {
4652         case IBMVNIC_10MBPS:
4653                 adapter->speed = SPEED_10;
4654                 break;
4655         case IBMVNIC_100MBPS:
4656                 adapter->speed = SPEED_100;
4657                 break;
4658         case IBMVNIC_1GBPS:
4659                 adapter->speed = SPEED_1000;
4660                 break;
4661         case IBMVNIC_10GBPS:
4662                 adapter->speed = SPEED_10000;
4663                 break;
4664         case IBMVNIC_25GBPS:
4665                 adapter->speed = SPEED_25000;
4666                 break;
4667         case IBMVNIC_40GBPS:
4668                 adapter->speed = SPEED_40000;
4669                 break;
4670         case IBMVNIC_50GBPS:
4671                 adapter->speed = SPEED_50000;
4672                 break;
4673         case IBMVNIC_100GBPS:
4674                 adapter->speed = SPEED_100000;
4675                 break;
4676         case IBMVNIC_200GBPS:
4677                 adapter->speed = SPEED_200000;
4678                 break;
4679         default:
4680                 if (netif_carrier_ok(netdev))
4681                         netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
4682                 adapter->speed = SPEED_UNKNOWN;
4683         }
4684         if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
4685                 adapter->duplex = DUPLEX_FULL;
4686         else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
4687                 adapter->duplex = DUPLEX_HALF;
4688         else
4689                 adapter->duplex = DUPLEX_UNKNOWN;
4690
4691         return rc;
4692 }
4693
4694 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4695                                struct ibmvnic_adapter *adapter)
4696 {
4697         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4698         struct net_device *netdev = adapter->netdev;
4699         struct device *dev = &adapter->vdev->dev;
4700         u64 *u64_crq = (u64 *)crq;
4701         long rc;
4702
4703         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4704                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4705                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4706         switch (gen_crq->first) {
4707         case IBMVNIC_CRQ_INIT_RSP:
4708                 switch (gen_crq->cmd) {
4709                 case IBMVNIC_CRQ_INIT:
4710                         dev_info(dev, "Partner initialized\n");
4711                         adapter->from_passive_init = true;
4712                         adapter->failover_pending = false;
4713                         if (!completion_done(&adapter->init_done)) {
4714                                 complete(&adapter->init_done);
4715                                 adapter->init_done_rc = -EIO;
4716                         }
4717                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4718                         break;
4719                 case IBMVNIC_CRQ_INIT_COMPLETE:
4720                         dev_info(dev, "Partner initialization complete\n");
4721                         adapter->crq.active = true;
4722                         send_version_xchg(adapter);
4723                         break;
4724                 default:
4725                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4726                 }
4727                 return;
4728         case IBMVNIC_CRQ_XPORT_EVENT:
4729                 netif_carrier_off(netdev);
4730                 adapter->crq.active = false;
4731                 /* terminate any thread waiting for a response
4732                  * from the device
4733                  */
4734                 if (!completion_done(&adapter->fw_done)) {
4735                         adapter->fw_done_rc = -EIO;
4736                         complete(&adapter->fw_done);
4737                 }
4738                 if (!completion_done(&adapter->stats_done))
4739                         complete(&adapter->stats_done);
4740                 if (test_bit(0, &adapter->resetting))
4741                         adapter->force_reset_recovery = true;
4742                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4743                         dev_info(dev, "Migrated, re-enabling adapter\n");
4744                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4745                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4746                         dev_info(dev, "Backing device failover detected\n");
4747                         adapter->failover_pending = true;
4748                 } else {
4749                         /* The adapter lost the connection */
4750                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4751                                 gen_crq->cmd);
4752                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4753                 }
4754                 return;
4755         case IBMVNIC_CRQ_CMD_RSP:
4756                 break;
4757         default:
4758                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4759                         gen_crq->first);
4760                 return;
4761         }
4762
4763         switch (gen_crq->cmd) {
4764         case VERSION_EXCHANGE_RSP:
4765                 rc = crq->version_exchange_rsp.rc.code;
4766                 if (rc) {
4767                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4768                         break;
4769                 }
4770                 ibmvnic_version =
4771                             be16_to_cpu(crq->version_exchange_rsp.version);
4772                 dev_info(dev, "Partner protocol version is %d\n",
4773                          ibmvnic_version);
4774                 send_query_cap(adapter);
4775                 break;
4776         case QUERY_CAPABILITY_RSP:
4777                 handle_query_cap_rsp(crq, adapter);
4778                 break;
4779         case QUERY_MAP_RSP:
4780                 handle_query_map_rsp(crq, adapter);
4781                 break;
4782         case REQUEST_MAP_RSP:
4783                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4784                 complete(&adapter->fw_done);
4785                 break;
4786         case REQUEST_UNMAP_RSP:
4787                 handle_request_unmap_rsp(crq, adapter);
4788                 break;
4789         case REQUEST_CAPABILITY_RSP:
4790                 handle_request_cap_rsp(crq, adapter);
4791                 break;
4792         case LOGIN_RSP:
4793                 netdev_dbg(netdev, "Got Login Response\n");
4794                 handle_login_rsp(crq, adapter);
4795                 break;
4796         case LOGICAL_LINK_STATE_RSP:
4797                 netdev_dbg(netdev,
4798                            "Got Logical Link State Response, state: %d rc: %d\n",
4799                            crq->logical_link_state_rsp.link_state,
4800                            crq->logical_link_state_rsp.rc.code);
4801                 adapter->logical_link_state =
4802                     crq->logical_link_state_rsp.link_state;
4803                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4804                 complete(&adapter->init_done);
4805                 break;
4806         case LINK_STATE_INDICATION:
4807                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4808                 adapter->phys_link_state =
4809                     crq->link_state_indication.phys_link_state;
4810                 adapter->logical_link_state =
4811                     crq->link_state_indication.logical_link_state;
4812                 if (adapter->phys_link_state && adapter->logical_link_state)
4813                         netif_carrier_on(netdev);
4814                 else
4815                         netif_carrier_off(netdev);
4816                 break;
4817         case CHANGE_MAC_ADDR_RSP:
4818                 netdev_dbg(netdev, "Got MAC address change Response\n");
4819                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4820                 break;
4821         case ERROR_INDICATION:
4822                 netdev_dbg(netdev, "Got Error Indication\n");
4823                 handle_error_indication(crq, adapter);
4824                 break;
4825         case REQUEST_STATISTICS_RSP:
4826                 netdev_dbg(netdev, "Got Statistics Response\n");
4827                 complete(&adapter->stats_done);
4828                 break;
4829         case QUERY_IP_OFFLOAD_RSP:
4830                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4831                 handle_query_ip_offload_rsp(adapter);
4832                 break;
4833         case MULTICAST_CTRL_RSP:
4834                 netdev_dbg(netdev, "Got multicast control Response\n");
4835                 break;
4836         case CONTROL_IP_OFFLOAD_RSP:
4837                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4838                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4839                                  sizeof(adapter->ip_offload_ctrl),
4840                                  DMA_TO_DEVICE);
4841                 complete(&adapter->init_done);
4842                 break;
4843         case COLLECT_FW_TRACE_RSP:
4844                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4845                 complete(&adapter->fw_done);
4846                 break;
4847         case GET_VPD_SIZE_RSP:
4848                 handle_vpd_size_rsp(crq, adapter);
4849                 break;
4850         case GET_VPD_RSP:
4851                 handle_vpd_rsp(crq, adapter);
4852                 break;
4853         case QUERY_PHYS_PARMS_RSP:
4854                 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
4855                 complete(&adapter->fw_done);
4856                 break;
4857         default:
4858                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4859                            gen_crq->cmd);
4860         }
4861 }
4862
4863 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4864 {
4865         struct ibmvnic_adapter *adapter = instance;
4866
4867         tasklet_schedule(&adapter->tasklet);
4868         return IRQ_HANDLED;
4869 }
4870
4871 static void ibmvnic_tasklet(struct tasklet_struct *t)
4872 {
4873         struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
4874         struct ibmvnic_crq_queue *queue = &adapter->crq;
4875         union ibmvnic_crq *crq;
4876         unsigned long flags;
4877         bool done = false;
4878
4879         spin_lock_irqsave(&queue->lock, flags);
4880         while (!done) {
4881                 /* Pull all the valid messages off the CRQ */
4882                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4883                         ibmvnic_handle_crq(crq, adapter);
4884                         crq->generic.first = 0;
4885                 }
4886
4887                 /* remain in tasklet until all
4888                  * capabilities responses are received
4889                  */
4890                 if (!adapter->wait_capability)
4891                         done = true;
4892         }
4893         /* if capabilities CRQ's were sent in this tasklet, the following
4894          * tasklet must wait until all responses are received
4895          */
4896         if (atomic_read(&adapter->running_cap_crqs) != 0)
4897                 adapter->wait_capability = true;
4898         spin_unlock_irqrestore(&queue->lock, flags);
4899 }
4900
4901 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4902 {
4903         struct vio_dev *vdev = adapter->vdev;
4904         int rc;
4905
4906         do {
4907                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4908         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4909
4910         if (rc)
4911                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4912
4913         return rc;
4914 }
4915
4916 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4917 {
4918         struct ibmvnic_crq_queue *crq = &adapter->crq;
4919         struct device *dev = &adapter->vdev->dev;
4920         struct vio_dev *vdev = adapter->vdev;
4921         int rc;
4922
4923         /* Close the CRQ */
4924         do {
4925                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4926         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4927
4928         /* Clean out the queue */
4929         memset(crq->msgs, 0, PAGE_SIZE);
4930         crq->cur = 0;
4931         crq->active = false;
4932
4933         /* And re-open it again */
4934         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4935                                 crq->msg_token, PAGE_SIZE);
4936
4937         if (rc == H_CLOSED)
4938                 /* Adapter is good, but other end is not ready */
4939                 dev_warn(dev, "Partner adapter not ready\n");
4940         else if (rc != 0)
4941                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4942
4943         return rc;
4944 }
4945
4946 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4947 {
4948         struct ibmvnic_crq_queue *crq = &adapter->crq;
4949         struct vio_dev *vdev = adapter->vdev;
4950         long rc;
4951
4952         if (!crq->msgs)
4953                 return;
4954
4955         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4956         free_irq(vdev->irq, adapter);
4957         tasklet_kill(&adapter->tasklet);
4958         do {
4959                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4960         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4961
4962         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4963                          DMA_BIDIRECTIONAL);
4964         free_page((unsigned long)crq->msgs);
4965         crq->msgs = NULL;
4966         crq->active = false;
4967 }
4968
4969 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4970 {
4971         struct ibmvnic_crq_queue *crq = &adapter->crq;
4972         struct device *dev = &adapter->vdev->dev;
4973         struct vio_dev *vdev = adapter->vdev;
4974         int rc, retrc = -ENOMEM;
4975
4976         if (crq->msgs)
4977                 return 0;
4978
4979         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4980         /* Should we allocate more than one page? */
4981
4982         if (!crq->msgs)
4983                 return -ENOMEM;
4984
4985         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4986         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4987                                         DMA_BIDIRECTIONAL);
4988         if (dma_mapping_error(dev, crq->msg_token))
4989                 goto map_failed;
4990
4991         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4992                                 crq->msg_token, PAGE_SIZE);
4993
4994         if (rc == H_RESOURCE)
4995                 /* maybe kexecing and resource is busy. try a reset */
4996                 rc = ibmvnic_reset_crq(adapter);
4997         retrc = rc;
4998
4999         if (rc == H_CLOSED) {
5000                 dev_warn(dev, "Partner adapter not ready\n");
5001         } else if (rc) {
5002                 dev_warn(dev, "Error %d opening adapter\n", rc);
5003                 goto reg_crq_failed;
5004         }
5005
5006         retrc = 0;
5007
5008         tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
5009
5010         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
5011         snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
5012                  adapter->vdev->unit_address);
5013         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
5014         if (rc) {
5015                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
5016                         vdev->irq, rc);
5017                 goto req_irq_failed;
5018         }
5019
5020         rc = vio_enable_interrupts(vdev);
5021         if (rc) {
5022                 dev_err(dev, "Error %d enabling interrupts\n", rc);
5023                 goto req_irq_failed;
5024         }
5025
5026         crq->cur = 0;
5027         spin_lock_init(&crq->lock);
5028
5029         return retrc;
5030
5031 req_irq_failed:
5032         tasklet_kill(&adapter->tasklet);
5033         do {
5034                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
5035         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
5036 reg_crq_failed:
5037         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
5038 map_failed:
5039         free_page((unsigned long)crq->msgs);
5040         crq->msgs = NULL;
5041         return retrc;
5042 }
5043
5044 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
5045 {
5046         struct device *dev = &adapter->vdev->dev;
5047         unsigned long timeout = msecs_to_jiffies(30000);
5048         u64 old_num_rx_queues, old_num_tx_queues;
5049         int rc;
5050
5051         adapter->from_passive_init = false;
5052
5053         if (reset) {
5054                 old_num_rx_queues = adapter->req_rx_queues;
5055                 old_num_tx_queues = adapter->req_tx_queues;
5056                 reinit_completion(&adapter->init_done);
5057         }
5058
5059         adapter->init_done_rc = 0;
5060         rc = ibmvnic_send_crq_init(adapter);
5061         if (rc) {
5062                 dev_err(dev, "Send crq init failed with error %d\n", rc);
5063                 return rc;
5064         }
5065
5066         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
5067                 dev_err(dev, "Initialization sequence timed out\n");
5068                 return -1;
5069         }
5070
5071         if (adapter->init_done_rc) {
5072                 release_crq_queue(adapter);
5073                 return adapter->init_done_rc;
5074         }
5075
5076         if (adapter->from_passive_init) {
5077                 adapter->state = VNIC_OPEN;
5078                 adapter->from_passive_init = false;
5079                 return -1;
5080         }
5081
5082         if (reset &&
5083             test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
5084             adapter->reset_reason != VNIC_RESET_MOBILITY) {
5085                 if (adapter->req_rx_queues != old_num_rx_queues ||
5086                     adapter->req_tx_queues != old_num_tx_queues) {
5087                         release_sub_crqs(adapter, 0);
5088                         rc = init_sub_crqs(adapter);
5089                 } else {
5090                         rc = reset_sub_crq_queues(adapter);
5091                 }
5092         } else {
5093                 rc = init_sub_crqs(adapter);
5094         }
5095
5096         if (rc) {
5097                 dev_err(dev, "Initialization of sub crqs failed\n");
5098                 release_crq_queue(adapter);
5099                 return rc;
5100         }
5101
5102         rc = init_sub_crq_irqs(adapter);
5103         if (rc) {
5104                 dev_err(dev, "Failed to initialize sub crq irqs\n");
5105                 release_crq_queue(adapter);
5106         }
5107
5108         return rc;
5109 }
5110
5111 static struct device_attribute dev_attr_failover;
5112
5113 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
5114 {
5115         struct ibmvnic_adapter *adapter;
5116         struct net_device *netdev;
5117         unsigned char *mac_addr_p;
5118         int rc;
5119
5120         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
5121                 dev->unit_address);
5122
5123         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
5124                                                         VETH_MAC_ADDR, NULL);
5125         if (!mac_addr_p) {
5126                 dev_err(&dev->dev,
5127                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
5128                         __FILE__, __LINE__);
5129                 return 0;
5130         }
5131
5132         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
5133                                    IBMVNIC_MAX_QUEUES);
5134         if (!netdev)
5135                 return -ENOMEM;
5136
5137         adapter = netdev_priv(netdev);
5138         adapter->state = VNIC_PROBING;
5139         dev_set_drvdata(&dev->dev, netdev);
5140         adapter->vdev = dev;
5141         adapter->netdev = netdev;
5142
5143         ether_addr_copy(adapter->mac_addr, mac_addr_p);
5144         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
5145         netdev->irq = dev->irq;
5146         netdev->netdev_ops = &ibmvnic_netdev_ops;
5147         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
5148         SET_NETDEV_DEV(netdev, &dev->dev);
5149
5150         spin_lock_init(&adapter->stats_lock);
5151
5152         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
5153         INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
5154                           __ibmvnic_delayed_reset);
5155         INIT_LIST_HEAD(&adapter->rwi_list);
5156         spin_lock_init(&adapter->rwi_lock);
5157         spin_lock_init(&adapter->state_lock);
5158         mutex_init(&adapter->fw_lock);
5159         init_completion(&adapter->init_done);
5160         init_completion(&adapter->fw_done);
5161         init_completion(&adapter->reset_done);
5162         init_completion(&adapter->stats_done);
5163         clear_bit(0, &adapter->resetting);
5164
5165         do {
5166                 rc = init_crq_queue(adapter);
5167                 if (rc) {
5168                         dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
5169                                 rc);
5170                         goto ibmvnic_init_fail;
5171                 }
5172
5173                 rc = ibmvnic_reset_init(adapter, false);
5174                 if (rc && rc != EAGAIN)
5175                         goto ibmvnic_init_fail;
5176         } while (rc == EAGAIN);
5177
5178         rc = init_stats_buffers(adapter);
5179         if (rc)
5180                 goto ibmvnic_init_fail;
5181
5182         rc = init_stats_token(adapter);
5183         if (rc)
5184                 goto ibmvnic_stats_fail;
5185
5186         netdev->mtu = adapter->req_mtu - ETH_HLEN;
5187         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
5188         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
5189
5190         rc = device_create_file(&dev->dev, &dev_attr_failover);
5191         if (rc)
5192                 goto ibmvnic_dev_file_err;
5193
5194         netif_carrier_off(netdev);
5195         rc = register_netdev(netdev);
5196         if (rc) {
5197                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
5198                 goto ibmvnic_register_fail;
5199         }
5200         dev_info(&dev->dev, "ibmvnic registered\n");
5201
5202         adapter->state = VNIC_PROBED;
5203
5204         adapter->wait_for_reset = false;
5205
5206         return 0;
5207
5208 ibmvnic_register_fail:
5209         device_remove_file(&dev->dev, &dev_attr_failover);
5210
5211 ibmvnic_dev_file_err:
5212         release_stats_token(adapter);
5213
5214 ibmvnic_stats_fail:
5215         release_stats_buffers(adapter);
5216
5217 ibmvnic_init_fail:
5218         release_sub_crqs(adapter, 1);
5219         release_crq_queue(adapter);
5220         mutex_destroy(&adapter->fw_lock);
5221         free_netdev(netdev);
5222
5223         return rc;
5224 }
5225
5226 static int ibmvnic_remove(struct vio_dev *dev)
5227 {
5228         struct net_device *netdev = dev_get_drvdata(&dev->dev);
5229         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5230         unsigned long flags;
5231
5232         spin_lock_irqsave(&adapter->state_lock, flags);
5233         if (adapter->state == VNIC_RESETTING) {
5234                 spin_unlock_irqrestore(&adapter->state_lock, flags);
5235                 return -EBUSY;
5236         }
5237
5238         adapter->state = VNIC_REMOVING;
5239         spin_unlock_irqrestore(&adapter->state_lock, flags);
5240
5241         flush_work(&adapter->ibmvnic_reset);
5242         flush_delayed_work(&adapter->ibmvnic_delayed_reset);
5243
5244         rtnl_lock();
5245         unregister_netdevice(netdev);
5246
5247         release_resources(adapter);
5248         release_sub_crqs(adapter, 1);
5249         release_crq_queue(adapter);
5250
5251         release_stats_token(adapter);
5252         release_stats_buffers(adapter);
5253
5254         adapter->state = VNIC_REMOVED;
5255
5256         rtnl_unlock();
5257         mutex_destroy(&adapter->fw_lock);
5258         device_remove_file(&dev->dev, &dev_attr_failover);
5259         free_netdev(netdev);
5260         dev_set_drvdata(&dev->dev, NULL);
5261
5262         return 0;
5263 }
5264
5265 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
5266                               const char *buf, size_t count)
5267 {
5268         struct net_device *netdev = dev_get_drvdata(dev);
5269         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5270         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
5271         __be64 session_token;
5272         long rc;
5273
5274         if (!sysfs_streq(buf, "1"))
5275                 return -EINVAL;
5276
5277         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
5278                          H_GET_SESSION_TOKEN, 0, 0, 0);
5279         if (rc) {
5280                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
5281                            rc);
5282                 return -EINVAL;
5283         }
5284
5285         session_token = (__be64)retbuf[0];
5286         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
5287                    be64_to_cpu(session_token));
5288         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
5289                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
5290         if (rc) {
5291                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
5292                            rc);
5293                 return -EINVAL;
5294         }
5295
5296         return count;
5297 }
5298
5299 static DEVICE_ATTR_WO(failover);
5300
5301 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
5302 {
5303         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
5304         struct ibmvnic_adapter *adapter;
5305         struct iommu_table *tbl;
5306         unsigned long ret = 0;
5307         int i;
5308
5309         tbl = get_iommu_table_base(&vdev->dev);
5310
5311         /* netdev inits at probe time along with the structures we need below*/
5312         if (!netdev)
5313                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
5314
5315         adapter = netdev_priv(netdev);
5316
5317         ret += PAGE_SIZE; /* the crq message queue */
5318         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
5319
5320         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
5321                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
5322
5323         for (i = 0; i < adapter->num_active_rx_pools; i++)
5324                 ret += adapter->rx_pool[i].size *
5325                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
5326
5327         return ret;
5328 }
5329
5330 static int ibmvnic_resume(struct device *dev)
5331 {
5332         struct net_device *netdev = dev_get_drvdata(dev);
5333         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
5334
5335         if (adapter->state != VNIC_OPEN)
5336                 return 0;
5337
5338         tasklet_schedule(&adapter->tasklet);
5339
5340         return 0;
5341 }
5342
5343 static const struct vio_device_id ibmvnic_device_table[] = {
5344         {"network", "IBM,vnic"},
5345         {"", "" }
5346 };
5347 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
5348
5349 static const struct dev_pm_ops ibmvnic_pm_ops = {
5350         .resume = ibmvnic_resume
5351 };
5352
5353 static struct vio_driver ibmvnic_driver = {
5354         .id_table       = ibmvnic_device_table,
5355         .probe          = ibmvnic_probe,
5356         .remove         = ibmvnic_remove,
5357         .get_desired_dma = ibmvnic_get_desired_dma,
5358         .name           = ibmvnic_driver_name,
5359         .pm             = &ibmvnic_pm_ops,
5360 };
5361
5362 /* module functions */
5363 static int __init ibmvnic_module_init(void)
5364 {
5365         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
5366                 IBMVNIC_DRIVER_VERSION);
5367
5368         return vio_register_driver(&ibmvnic_driver);
5369 }
5370
5371 static void __exit ibmvnic_module_exit(void)
5372 {
5373         vio_unregister_driver(&ibmvnic_driver);
5374 }
5375
5376 module_init(ibmvnic_module_init);
5377 module_exit(ibmvnic_module_exit);