drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/in.h>
  63 #include <linux/ip.h>
  64 #include <linux/ipv6.h>
  65 #include <linux/irq.h>
  66 #include <linux/kthread.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/interrupt.h>
  69 #include <net/net_namespace.h>
  70 #include <asm/hvcall.h>
  71 #include <linux/atomic.h>
  72 #include <asm/vio.h>
  73 #include <asm/iommu.h>
  74 #include <linux/uaccess.h>
  75 #include <asm/firmware.h>
  76 #include <linux/workqueue.h>
  77 #include <linux/if_vlan.h>
  78
  79 #include "ibmvnic.h"
  80
  81 static const char ibmvnic_driver_name[] = "ibmvnic";
  82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  83
  84 MODULE_AUTHOR("Santiago Leon");
  85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  88
  89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  90 static int ibmvnic_remove(struct vio_dev *);
  91 static void release_sub_crqs(struct ibmvnic_adapter *);
  92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  97                        union sub_crq *sub_crq);
  98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
  99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 100 static int enable_scrq_irq(struct ibmvnic_adapter *,
 101                            struct ibmvnic_sub_crq_queue *);
 102 static int disable_scrq_irq(struct ibmvnic_adapter *,
 103                             struct ibmvnic_sub_crq_queue *);
 104 static int pending_scrq(struct ibmvnic_adapter *,
 105                         struct ibmvnic_sub_crq_queue *);
 106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 107                                         struct ibmvnic_sub_crq_queue *);
 108 static int ibmvnic_poll(struct napi_struct *napi, int data);
 109 static void send_map_query(struct ibmvnic_adapter *adapter);
 110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 112 static void send_login(struct ibmvnic_adapter *adapter);
 113 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 114 static int init_sub_crqs(struct ibmvnic_adapter *);
 115 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 116 static int ibmvnic_init(struct ibmvnic_adapter *);
 117 static void release_crq_queue(struct ibmvnic_adapter *);
 118
 119 struct ibmvnic_stat {
 120         char name[ETH_GSTRING_LEN];
 121         int offset;
 122 };
 123
 124 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 125                              offsetof(struct ibmvnic_statistics, stat))
 126 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 127
 128 static const struct ibmvnic_stat ibmvnic_stats[] = {
 129         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 130         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 131         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 132         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 133         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 134         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 135         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 136         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 137         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 138         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 139         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 140         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 141         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 142         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 143         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 144         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 145         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 146         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 147         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 148         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 149         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 150         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 151 };
 152
 153 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 154                           unsigned long length, unsigned long *number,
 155                           unsigned long *irq)
 156 {
 157         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 158         long rc;
 159
 160         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 161         *number = retbuf[0];
 162         *irq = retbuf[1];
 163
 164         return rc;
 165 }
 166
 167 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 168                                 struct ibmvnic_long_term_buff *ltb, int size)
 169 {
 170         struct device *dev = &adapter->vdev->dev;
 171
 172         ltb->size = size;
 173         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 174                                        GFP_KERNEL);
 175
 176         if (!ltb->buff) {
 177                 dev_err(dev, "Couldn't alloc long term buffer\n");
 178                 return -ENOMEM;
 179         }
 180         ltb->map_id = adapter->map_id;
 181         adapter->map_id++;
 182
 183         init_completion(&adapter->fw_done);
 184         send_request_map(adapter, ltb->addr,
 185                          ltb->size, ltb->map_id);
 186         wait_for_completion(&adapter->fw_done);
 187
 188         if (adapter->fw_done_rc) {
 189                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 190                         adapter->fw_done_rc);
 191                 return -1;
 192         }
 193         return 0;
 194 }
 195
 196 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 197                                 struct ibmvnic_long_term_buff *ltb)
 198 {
 199         struct device *dev = &adapter->vdev->dev;
 200
 201         if (!ltb->buff)
 202                 return;
 203
 204         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 205             adapter->reset_reason != VNIC_RESET_MOBILITY)
 206                 send_request_unmap(adapter, ltb->map_id);
 207         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 208 }
 209
 210 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 211                                 struct ibmvnic_long_term_buff *ltb)
 212 {
 213         memset(ltb->buff, 0, ltb->size);
 214
 215         init_completion(&adapter->fw_done);
 216         send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 217         wait_for_completion(&adapter->fw_done);
 218
 219         if (adapter->fw_done_rc) {
 220                 dev_info(&adapter->vdev->dev,
 221                          "Reset failed, attempting to free and reallocate buffer\n");
 222                 free_long_term_buff(adapter, ltb);
 223                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 224         }
 225         return 0;
 226 }
 227
 228 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 229 {
 230         int i;
 231
 232         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 233              i++)
 234                 adapter->rx_pool[i].active = 0;
 235 }
 236
 237 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 238                               struct ibmvnic_rx_pool *pool)
 239 {
 240         int count = pool->size - atomic_read(&pool->available);
 241         struct device *dev = &adapter->vdev->dev;
 242         int buffers_added = 0;
 243         unsigned long lpar_rc;
 244         union sub_crq sub_crq;
 245         struct sk_buff *skb;
 246         unsigned int offset;
 247         dma_addr_t dma_addr;
 248         unsigned char *dst;
 249         u64 *handle_array;
 250         int shift = 0;
 251         int index;
 252         int i;
 253
 254         if (!pool->active)
 255                 return;
 256
 257         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 258                                       be32_to_cpu(adapter->login_rsp_buf->
 259                                       off_rxadd_subcrqs));
 260
 261         for (i = 0; i < count; ++i) {
 262                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 263                 if (!skb) {
 264                         dev_err(dev, "Couldn't replenish rx buff\n");
 265                         adapter->replenish_no_mem++;
 266                         break;
 267                 }
 268
 269                 index = pool->free_map[pool->next_free];
 270
 271                 if (pool->rx_buff[index].skb)
 272                         dev_err(dev, "Inconsistent free_map!\n");
 273
 274                 /* Copy the skb to the long term mapped DMA buffer */
 275                 offset = index * pool->buff_size;
 276                 dst = pool->long_term_buff.buff + offset;
 277                 memset(dst, 0, pool->buff_size);
 278                 dma_addr = pool->long_term_buff.addr + offset;
 279                 pool->rx_buff[index].data = dst;
 280
 281                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 282                 pool->rx_buff[index].dma = dma_addr;
 283                 pool->rx_buff[index].skb = skb;
 284                 pool->rx_buff[index].pool_index = pool->index;
 285                 pool->rx_buff[index].size = pool->buff_size;
 286
 287                 memset(&sub_crq, 0, sizeof(sub_crq));
 288                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 289                 sub_crq.rx_add.correlator =
 290                     cpu_to_be64((u64)&pool->rx_buff[index]);
 291                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 292                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 293
 294                 /* The length field of the sCRQ is defined to be 24 bits so the
 295                  * buffer size needs to be left shifted by a byte before it is
 296                  * converted to big endian to prevent the last byte from being
 297                  * truncated.
 298                  */
 299 #ifdef __LITTLE_ENDIAN__
 300                 shift = 8;
 301 #endif
 302                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 303
 304                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 305                                       &sub_crq);
 306                 if (lpar_rc != H_SUCCESS)
 307                         goto failure;
 308
 309                 buffers_added++;
 310                 adapter->replenish_add_buff_success++;
 311                 pool->next_free = (pool->next_free + 1) % pool->size;
 312         }
 313         atomic_add(buffers_added, &pool->available);
 314         return;
 315
 316 failure:
 317         dev_info(dev, "replenish pools failure\n");
 318         pool->free_map[pool->next_free] = index;
 319         pool->rx_buff[index].skb = NULL;
 320         if (!dma_mapping_error(dev, dma_addr))
 321                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 322                                  DMA_FROM_DEVICE);
 323
 324         dev_kfree_skb_any(skb);
 325         adapter->replenish_add_buff_failure++;
 326         atomic_add(buffers_added, &pool->available);
 327
 328         if (lpar_rc == H_CLOSED) {
 329                 /* Disable buffer pool replenishment and report carrier off if
 330                  * queue is closed. Firmware guarantees that a signal will
 331                  * be sent to the driver, triggering a reset.
 332                  */
 333                 deactivate_rx_pools(adapter);
 334                 netif_carrier_off(adapter->netdev);
 335         }
 336 }
 337
 338 static void replenish_pools(struct ibmvnic_adapter *adapter)
 339 {
 340         int i;
 341
 342         adapter->replenish_task_cycles++;
 343         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 344              i++) {
 345                 if (adapter->rx_pool[i].active)
 346                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 347         }
 348 }
 349
 350 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 351 {
 352         kfree(adapter->tx_stats_buffers);
 353         kfree(adapter->rx_stats_buffers);
 354 }
 355
 356 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 357 {
 358         adapter->tx_stats_buffers =
 359                                 kcalloc(adapter->req_tx_queues,
 360                                         sizeof(struct ibmvnic_tx_queue_stats),
 361                                         GFP_KERNEL);
 362         if (!adapter->tx_stats_buffers)
 363                 return -ENOMEM;
 364
 365         adapter->rx_stats_buffers =
 366                                 kcalloc(adapter->req_rx_queues,
 367                                         sizeof(struct ibmvnic_rx_queue_stats),
 368                                         GFP_KERNEL);
 369         if (!adapter->rx_stats_buffers)
 370                 return -ENOMEM;
 371
 372         return 0;
 373 }
 374
 375 static void release_stats_token(struct ibmvnic_adapter *adapter)
 376 {
 377         struct device *dev = &adapter->vdev->dev;
 378
 379         if (!adapter->stats_token)
 380                 return;
 381
 382         dma_unmap_single(dev, adapter->stats_token,
 383                          sizeof(struct ibmvnic_statistics),
 384                          DMA_FROM_DEVICE);
 385         adapter->stats_token = 0;
 386 }
 387
 388 static int init_stats_token(struct ibmvnic_adapter *adapter)
 389 {
 390         struct device *dev = &adapter->vdev->dev;
 391         dma_addr_t stok;
 392
 393         stok = dma_map_single(dev, &adapter->stats,
 394                               sizeof(struct ibmvnic_statistics),
 395                               DMA_FROM_DEVICE);
 396         if (dma_mapping_error(dev, stok)) {
 397                 dev_err(dev, "Couldn't map stats buffer\n");
 398                 return -1;
 399         }
 400
 401         adapter->stats_token = stok;
 402         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 403         return 0;
 404 }
 405
 406 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 407 {
 408         struct ibmvnic_rx_pool *rx_pool;
 409         int rx_scrqs;
 410         int i, j, rc;
 411
 412         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 413         for (i = 0; i < rx_scrqs; i++) {
 414                 rx_pool = &adapter->rx_pool[i];
 415
 416                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 417
 418                 rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
 419                 if (rc)
 420                         return rc;
 421
 422                 for (j = 0; j < rx_pool->size; j++)
 423                         rx_pool->free_map[j] = j;
 424
 425                 memset(rx_pool->rx_buff, 0,
 426                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 427
 428                 atomic_set(&rx_pool->available, 0);
 429                 rx_pool->next_alloc = 0;
 430                 rx_pool->next_free = 0;
 431                 rx_pool->active = 1;
 432         }
 433
 434         return 0;
 435 }
 436
 437 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 438 {
 439         struct ibmvnic_rx_pool *rx_pool;
 440         int rx_scrqs;
 441         int i, j;
 442
 443         if (!adapter->rx_pool)
 444                 return;
 445
 446         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 447         for (i = 0; i < rx_scrqs; i++) {
 448                 rx_pool = &adapter->rx_pool[i];
 449
 450                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 451
 452                 kfree(rx_pool->free_map);
 453                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 454
 455                 if (!rx_pool->rx_buff)
 456                         continue;
 457
 458                 for (j = 0; j < rx_pool->size; j++) {
 459                         if (rx_pool->rx_buff[j].skb) {
 460                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 461                                 rx_pool->rx_buff[i].skb = NULL;
 462                         }
 463                 }
 464
 465                 kfree(rx_pool->rx_buff);
 466         }
 467
 468         kfree(adapter->rx_pool);
 469         adapter->rx_pool = NULL;
 470 }
 471
 472 static int init_rx_pools(struct net_device *netdev)
 473 {
 474         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 475         struct device *dev = &adapter->vdev->dev;
 476         struct ibmvnic_rx_pool *rx_pool;
 477         int rxadd_subcrqs;
 478         u64 *size_array;
 479         int i, j;
 480
 481         rxadd_subcrqs =
 482                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 483         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 484                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 485
 486         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 487                                    sizeof(struct ibmvnic_rx_pool),
 488                                    GFP_KERNEL);
 489         if (!adapter->rx_pool) {
 490                 dev_err(dev, "Failed to allocate rx pools\n");
 491                 return -1;
 492         }
 493
 494         for (i = 0; i < rxadd_subcrqs; i++) {
 495                 rx_pool = &adapter->rx_pool[i];
 496
 497                 netdev_dbg(adapter->netdev,
 498                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 499                            i, adapter->req_rx_add_entries_per_subcrq,
 500                            be64_to_cpu(size_array[i]));
 501
 502                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 503                 rx_pool->index = i;
 504                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 505                 rx_pool->active = 1;
 506
 507                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 508                                             GFP_KERNEL);
 509                 if (!rx_pool->free_map) {
 510                         release_rx_pools(adapter);
 511                         return -1;
 512                 }
 513
 514                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 515                                            sizeof(struct ibmvnic_rx_buff),
 516                                            GFP_KERNEL);
 517                 if (!rx_pool->rx_buff) {
 518                         dev_err(dev, "Couldn't alloc rx buffers\n");
 519                         release_rx_pools(adapter);
 520                         return -1;
 521                 }
 522
 523                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 524                                          rx_pool->size * rx_pool->buff_size)) {
 525                         release_rx_pools(adapter);
 526                         return -1;
 527                 }
 528
 529                 for (j = 0; j < rx_pool->size; ++j)
 530                         rx_pool->free_map[j] = j;
 531
 532                 atomic_set(&rx_pool->available, 0);
 533                 rx_pool->next_alloc = 0;
 534                 rx_pool->next_free = 0;
 535         }
 536
 537         return 0;
 538 }
 539
 540 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 541 {
 542         struct ibmvnic_tx_pool *tx_pool;
 543         int tx_scrqs;
 544         int i, j, rc;
 545
 546         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 547         for (i = 0; i < tx_scrqs; i++) {
 548                 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
 549
 550                 tx_pool = &adapter->tx_pool[i];
 551
 552                 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 553                 if (rc)
 554                         return rc;
 555
 556                 memset(tx_pool->tx_buff, 0,
 557                        adapter->req_tx_entries_per_subcrq *
 558                        sizeof(struct ibmvnic_tx_buff));
 559
 560                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 561                         tx_pool->free_map[j] = j;
 562
 563                 tx_pool->consumer_index = 0;
 564                 tx_pool->producer_index = 0;
 565         }
 566
 567         return 0;
 568 }
 569
 570 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 571 {
 572         struct ibmvnic_tx_pool *tx_pool;
 573         int i, tx_scrqs;
 574
 575         if (!adapter->tx_pool)
 576                 return;
 577
 578         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 579         for (i = 0; i < tx_scrqs; i++) {
 580                 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
 581                 tx_pool = &adapter->tx_pool[i];
 582                 kfree(tx_pool->tx_buff);
 583                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 584                 kfree(tx_pool->free_map);
 585         }
 586
 587         kfree(adapter->tx_pool);
 588         adapter->tx_pool = NULL;
 589 }
 590
 591 static int init_tx_pools(struct net_device *netdev)
 592 {
 593         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 594         struct device *dev = &adapter->vdev->dev;
 595         struct ibmvnic_tx_pool *tx_pool;
 596         int tx_subcrqs;
 597         int i, j;
 598
 599         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 600         adapter->tx_pool = kcalloc(tx_subcrqs,
 601                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 602         if (!adapter->tx_pool)
 603                 return -1;
 604
 605         for (i = 0; i < tx_subcrqs; i++) {
 606                 tx_pool = &adapter->tx_pool[i];
 607
 608                 netdev_dbg(adapter->netdev,
 609                            "Initializing tx_pool[%d], %lld buffs\n",
 610                            i, adapter->req_tx_entries_per_subcrq);
 611
 612                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 613                                            sizeof(struct ibmvnic_tx_buff),
 614                                            GFP_KERNEL);
 615                 if (!tx_pool->tx_buff) {
 616                         dev_err(dev, "tx pool buffer allocation failed\n");
 617                         release_tx_pools(adapter);
 618                         return -1;
 619                 }
 620
 621                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 622                                          adapter->req_tx_entries_per_subcrq *
 623                                          adapter->req_mtu)) {
 624                         release_tx_pools(adapter);
 625                         return -1;
 626                 }
 627
 628                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 629                                             sizeof(int), GFP_KERNEL);
 630                 if (!tx_pool->free_map) {
 631                         release_tx_pools(adapter);
 632                         return -1;
 633                 }
 634
 635                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 636                         tx_pool->free_map[j] = j;
 637
 638                 tx_pool->consumer_index = 0;
 639                 tx_pool->producer_index = 0;
 640         }
 641
 642         return 0;
 643 }
 644
 645 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 646 {
 647         struct device *dev = &adapter->vdev->dev;
 648         struct ibmvnic_error_buff *error_buff, *tmp;
 649         unsigned long flags;
 650
 651         spin_lock_irqsave(&adapter->error_list_lock, flags);
 652         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 653                 list_del(&error_buff->list);
 654                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 655                                  DMA_FROM_DEVICE);
 656                 kfree(error_buff->buff);
 657                 kfree(error_buff);
 658         }
 659         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 660 }
 661
 662 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 663 {
 664         int i;
 665
 666         if (adapter->napi_enabled)
 667                 return;
 668
 669         for (i = 0; i < adapter->req_rx_queues; i++)
 670                 napi_enable(&adapter->napi[i]);
 671
 672         adapter->napi_enabled = true;
 673 }
 674
 675 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 676 {
 677         int i;
 678
 679         if (!adapter->napi_enabled)
 680                 return;
 681
 682         for (i = 0; i < adapter->req_rx_queues; i++) {
 683                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 684                 napi_disable(&adapter->napi[i]);
 685         }
 686
 687         adapter->napi_enabled = false;
 688 }
 689
 690 static int ibmvnic_login(struct net_device *netdev)
 691 {
 692         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 693         unsigned long timeout = msecs_to_jiffies(30000);
 694         struct device *dev = &adapter->vdev->dev;
 695         int rc;
 696
 697         do {
 698                 if (adapter->renegotiate) {
 699                         adapter->renegotiate = false;
 700                         release_sub_crqs(adapter);
 701
 702                         reinit_completion(&adapter->init_done);
 703                         send_cap_queries(adapter);
 704                         if (!wait_for_completion_timeout(&adapter->init_done,
 705                                                          timeout)) {
 706                                 dev_err(dev, "Capabilities query timeout\n");
 707                                 return -1;
 708                         }
 709                         rc = init_sub_crqs(adapter);
 710                         if (rc) {
 711                                 dev_err(dev,
 712                                         "Initialization of SCRQ's failed\n");
 713                                 return -1;
 714                         }
 715                         rc = init_sub_crq_irqs(adapter);
 716                         if (rc) {
 717                                 dev_err(dev,
 718                                         "Initialization of SCRQ's irqs failed\n");
 719                                 return -1;
 720                         }
 721                 }
 722
 723                 reinit_completion(&adapter->init_done);
 724                 send_login(adapter);
 725                 if (!wait_for_completion_timeout(&adapter->init_done,
 726                                                  timeout)) {
 727                         dev_err(dev, "Login timeout\n");
 728                         return -1;
 729                 }
 730         } while (adapter->renegotiate);
 731
 732         return 0;
 733 }
 734
 735 static void release_resources(struct ibmvnic_adapter *adapter)
 736 {
 737         int i;
 738
 739         release_tx_pools(adapter);
 740         release_rx_pools(adapter);
 741
 742         release_stats_token(adapter);
 743         release_stats_buffers(adapter);
 744         release_error_buffers(adapter);
 745
 746         if (adapter->napi) {
 747                 for (i = 0; i < adapter->req_rx_queues; i++) {
 748                         if (&adapter->napi[i]) {
 749                                 netdev_dbg(adapter->netdev,
 750                                            "Releasing napi[%d]\n", i);
 751                                 netif_napi_del(&adapter->napi[i]);
 752                         }
 753                 }
 754         }
 755 }
 756
 757 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 758 {
 759         struct net_device *netdev = adapter->netdev;
 760         unsigned long timeout = msecs_to_jiffies(30000);
 761         union ibmvnic_crq crq;
 762         bool resend;
 763         int rc;
 764
 765         netdev_dbg(netdev, "setting link state %d\n", link_state);
 766
 767         memset(&crq, 0, sizeof(crq));
 768         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 769         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 770         crq.logical_link_state.link_state = link_state;
 771
 772         do {
 773                 resend = false;
 774
 775                 reinit_completion(&adapter->init_done);
 776                 rc = ibmvnic_send_crq(adapter, &crq);
 777                 if (rc) {
 778                         netdev_err(netdev, "Failed to set link state\n");
 779                         return rc;
 780                 }
 781
 782                 if (!wait_for_completion_timeout(&adapter->init_done,
 783                                                  timeout)) {
 784                         netdev_err(netdev, "timeout setting link state\n");
 785                         return -1;
 786                 }
 787
 788                 if (adapter->init_done_rc == 1) {
 789                         /* Partuial success, delay and re-send */
 790                         mdelay(1000);
 791                         resend = true;
 792                 }
 793         } while (resend);
 794
 795         return 0;
 796 }
 797
 798 static int set_real_num_queues(struct net_device *netdev)
 799 {
 800         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 801         int rc;
 802
 803         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 804                    adapter->req_tx_queues, adapter->req_rx_queues);
 805
 806         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 807         if (rc) {
 808                 netdev_err(netdev, "failed to set the number of tx queues\n");
 809                 return rc;
 810         }
 811
 812         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 813         if (rc)
 814                 netdev_err(netdev, "failed to set the number of rx queues\n");
 815
 816         return rc;
 817 }
 818
 819 static int init_resources(struct ibmvnic_adapter *adapter)
 820 {
 821         struct net_device *netdev = adapter->netdev;
 822         int i, rc;
 823
 824         rc = set_real_num_queues(netdev);
 825         if (rc)
 826                 return rc;
 827
 828         rc = init_stats_buffers(adapter);
 829         if (rc)
 830                 return rc;
 831
 832         rc = init_stats_token(adapter);
 833         if (rc)
 834                 return rc;
 835
 836         adapter->map_id = 1;
 837         adapter->napi = kcalloc(adapter->req_rx_queues,
 838                                 sizeof(struct napi_struct), GFP_KERNEL);
 839         if (!adapter->napi)
 840                 return -ENOMEM;
 841
 842         for (i = 0; i < adapter->req_rx_queues; i++) {
 843                 netdev_dbg(netdev, "Adding napi[%d]\n", i);
 844                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 845                                NAPI_POLL_WEIGHT);
 846         }
 847
 848         send_map_query(adapter);
 849
 850         rc = init_rx_pools(netdev);
 851         if (rc)
 852                 return rc;
 853
 854         rc = init_tx_pools(netdev);
 855         return rc;
 856 }
 857
 858 static int __ibmvnic_open(struct net_device *netdev)
 859 {
 860         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 861         enum vnic_state prev_state = adapter->state;
 862         int i, rc;
 863
 864         adapter->state = VNIC_OPENING;
 865         replenish_pools(adapter);
 866         ibmvnic_napi_enable(adapter);
 867
 868         /* We're ready to receive frames, enable the sub-crq interrupts and
 869          * set the logical link state to up
 870          */
 871         for (i = 0; i < adapter->req_rx_queues; i++) {
 872                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
 873                 if (prev_state == VNIC_CLOSED)
 874                         enable_irq(adapter->rx_scrq[i]->irq);
 875                 else
 876                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 877         }
 878
 879         for (i = 0; i < adapter->req_tx_queues; i++) {
 880                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
 881                 if (prev_state == VNIC_CLOSED)
 882                         enable_irq(adapter->tx_scrq[i]->irq);
 883                 else
 884                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 885         }
 886
 887         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
 888         if (rc) {
 889                 for (i = 0; i < adapter->req_rx_queues; i++)
 890                         napi_disable(&adapter->napi[i]);
 891                 release_resources(adapter);
 892                 return rc;
 893         }
 894
 895         netif_tx_start_all_queues(netdev);
 896
 897         if (prev_state == VNIC_CLOSED) {
 898                 for (i = 0; i < adapter->req_rx_queues; i++)
 899                         napi_schedule(&adapter->napi[i]);
 900         }
 901
 902         adapter->state = VNIC_OPEN;
 903         return rc;
 904 }
 905
 906 static int ibmvnic_open(struct net_device *netdev)
 907 {
 908         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 909         int rc;
 910
 911         mutex_lock(&adapter->reset_lock);
 912
 913         if (adapter->state != VNIC_CLOSED) {
 914                 rc = ibmvnic_login(netdev);
 915                 if (rc) {
 916                         mutex_unlock(&adapter->reset_lock);
 917                         return rc;
 918                 }
 919
 920                 rc = init_resources(adapter);
 921                 if (rc) {
 922                         netdev_err(netdev, "failed to initialize resources\n");
 923                         release_resources(adapter);
 924                         mutex_unlock(&adapter->reset_lock);
 925                         return rc;
 926                 }
 927         }
 928
 929         rc = __ibmvnic_open(netdev);
 930         mutex_unlock(&adapter->reset_lock);
 931
 932         return rc;
 933 }
 934
 935 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
 936 {
 937         struct ibmvnic_tx_pool *tx_pool;
 938         u64 tx_entries;
 939         int tx_scrqs;
 940         int i, j;
 941
 942         if (!adapter->tx_pool)
 943                 return;
 944
 945         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 946         tx_entries = adapter->req_tx_entries_per_subcrq;
 947
 948         /* Free any remaining skbs in the tx buffer pools */
 949         for (i = 0; i < tx_scrqs; i++) {
 950                 tx_pool = &adapter->tx_pool[i];
 951                 if (!tx_pool)
 952                         continue;
 953
 954                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
 955                 for (j = 0; j < tx_entries; j++) {
 956                         if (tx_pool->tx_buff[j].skb) {
 957                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
 958                                 tx_pool->tx_buff[j].skb = NULL;
 959                         }
 960                 }
 961         }
 962 }
 963
 964 static int __ibmvnic_close(struct net_device *netdev)
 965 {
 966         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 967         int rc = 0;
 968         int i;
 969
 970         adapter->state = VNIC_CLOSING;
 971
 972         /* ensure that transmissions are stopped if called by do_reset */
 973         if (adapter->resetting)
 974                 netif_tx_disable(netdev);
 975         else
 976                 netif_tx_stop_all_queues(netdev);
 977
 978         ibmvnic_napi_disable(adapter);
 979
 980         if (adapter->tx_scrq) {
 981                 for (i = 0; i < adapter->req_tx_queues; i++)
 982                         if (adapter->tx_scrq[i]->irq) {
 983                                 netdev_dbg(adapter->netdev,
 984                                            "Disabling tx_scrq[%d] irq\n", i);
 985                                 disable_irq(adapter->tx_scrq[i]->irq);
 986                         }
 987         }
 988
 989         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
 990         if (rc)
 991                 return rc;
 992
 993         if (adapter->rx_scrq) {
 994                 for (i = 0; i < adapter->req_rx_queues; i++) {
 995                         int retries = 10;
 996
 997                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
 998                                 retries--;
 999                                 mdelay(100);
1000
1001                                 if (retries == 0)
1002                                         break;
1003                         }
1004
1005                         if (adapter->rx_scrq[i]->irq) {
1006                                 netdev_dbg(adapter->netdev,
1007                                            "Disabling rx_scrq[%d] irq\n", i);
1008                                 disable_irq(adapter->rx_scrq[i]->irq);
1009                         }
1010                 }
1011         }
1012
1013         clean_tx_pools(adapter);
1014         adapter->state = VNIC_CLOSED;
1015         return rc;
1016 }
1017
1018 static int ibmvnic_close(struct net_device *netdev)
1019 {
1020         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1021         int rc;
1022
1023         mutex_lock(&adapter->reset_lock);
1024         rc = __ibmvnic_close(netdev);
1025         mutex_unlock(&adapter->reset_lock);
1026
1027         return rc;
1028 }
1029
1030 /**
1031  * build_hdr_data - creates L2/L3/L4 header data buffer
1032  * @hdr_field - bitfield determining needed headers
1033  * @skb - socket buffer
1034  * @hdr_len - array of header lengths
1035  * @tot_len - total length of data
1036  *
1037  * Reads hdr_field to determine which headers are needed by firmware.
1038  * Builds a buffer containing these headers.  Saves individual header
1039  * lengths and total buffer length to be used to build descriptors.
1040  */
1041 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1042                           int *hdr_len, u8 *hdr_data)
1043 {
1044         int len = 0;
1045         u8 *hdr;
1046
1047         hdr_len[0] = sizeof(struct ethhdr);
1048
1049         if (skb->protocol == htons(ETH_P_IP)) {
1050                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1051                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1052                         hdr_len[2] = tcp_hdrlen(skb);
1053                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1054                         hdr_len[2] = sizeof(struct udphdr);
1055         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1056                 hdr_len[1] = sizeof(struct ipv6hdr);
1057                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1058                         hdr_len[2] = tcp_hdrlen(skb);
1059                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1060                         hdr_len[2] = sizeof(struct udphdr);
1061         }
1062
1063         memset(hdr_data, 0, 120);
1064         if ((hdr_field >> 6) & 1) {
1065                 hdr = skb_mac_header(skb);
1066                 memcpy(hdr_data, hdr, hdr_len[0]);
1067                 len += hdr_len[0];
1068         }
1069
1070         if ((hdr_field >> 5) & 1) {
1071                 hdr = skb_network_header(skb);
1072                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1073                 len += hdr_len[1];
1074         }
1075
1076         if ((hdr_field >> 4) & 1) {
1077                 hdr = skb_transport_header(skb);
1078                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1079                 len += hdr_len[2];
1080         }
1081         return len;
1082 }
1083
1084 /**
1085  * create_hdr_descs - create header and header extension descriptors
1086  * @hdr_field - bitfield determining needed headers
1087  * @data - buffer containing header data
1088  * @len - length of data buffer
1089  * @hdr_len - array of individual header lengths
1090  * @scrq_arr - descriptor array
1091  *
1092  * Creates header and, if needed, header extension descriptors and
1093  * places them in a descriptor array, scrq_arr
1094  */
1095
1096 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1097                             union sub_crq *scrq_arr)
1098 {
1099         union sub_crq hdr_desc;
1100         int tmp_len = len;
1101         int num_descs = 0;
1102         u8 *data, *cur;
1103         int tmp;
1104
1105         while (tmp_len > 0) {
1106                 cur = hdr_data + len - tmp_len;
1107
1108                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1109                 if (cur != hdr_data) {
1110                         data = hdr_desc.hdr_ext.data;
1111                         tmp = tmp_len > 29 ? 29 : tmp_len;
1112                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1113                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1114                         hdr_desc.hdr_ext.len = tmp;
1115                 } else {
1116                         data = hdr_desc.hdr.data;
1117                         tmp = tmp_len > 24 ? 24 : tmp_len;
1118                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1119                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1120                         hdr_desc.hdr.len = tmp;
1121                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1122                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1123                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1124                         hdr_desc.hdr.flag = hdr_field << 1;
1125                 }
1126                 memcpy(data, cur, tmp);
1127                 tmp_len -= tmp;
1128                 *scrq_arr = hdr_desc;
1129                 scrq_arr++;
1130                 num_descs++;
1131         }
1132
1133         return num_descs;
1134 }
1135
1136 /**
1137  * build_hdr_descs_arr - build a header descriptor array
1138  * @skb - socket buffer
1139  * @num_entries - number of descriptors to be sent
1140  * @subcrq - first TX descriptor
1141  * @hdr_field - bit field determining which headers will be sent
1142  *
1143  * This function will build a TX descriptor array with applicable
1144  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1145  */
1146
1147 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1148                                 int *num_entries, u8 hdr_field)
1149 {
1150         int hdr_len[3] = {0, 0, 0};
1151         int tot_len;
1152         u8 *hdr_data = txbuff->hdr_data;
1153
1154         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1155                                  txbuff->hdr_data);
1156         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1157                          txbuff->indir_arr + 1);
1158 }
1159
1160 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1161 {
1162         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1163         int queue_num = skb_get_queue_mapping(skb);
1164         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1165         struct device *dev = &adapter->vdev->dev;
1166         struct ibmvnic_tx_buff *tx_buff = NULL;
1167         struct ibmvnic_sub_crq_queue *tx_scrq;
1168         struct ibmvnic_tx_pool *tx_pool;
1169         unsigned int tx_send_failed = 0;
1170         unsigned int tx_map_failed = 0;
1171         unsigned int tx_dropped = 0;
1172         unsigned int tx_packets = 0;
1173         unsigned int tx_bytes = 0;
1174         dma_addr_t data_dma_addr;
1175         struct netdev_queue *txq;
1176         unsigned long lpar_rc;
1177         union sub_crq tx_crq;
1178         unsigned int offset;
1179         int num_entries = 1;
1180         unsigned char *dst;
1181         u64 *handle_array;
1182         int index = 0;
1183         int ret = 0;
1184
1185         if (adapter->resetting) {
1186                 if (!netif_subqueue_stopped(netdev, skb))
1187                         netif_stop_subqueue(netdev, queue_num);
1188                 dev_kfree_skb_any(skb);
1189
1190                 tx_send_failed++;
1191                 tx_dropped++;
1192                 ret = NETDEV_TX_OK;
1193                 goto out;
1194         }
1195
1196         tx_pool = &adapter->tx_pool[queue_num];
1197         tx_scrq = adapter->tx_scrq[queue_num];
1198         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1199         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1200                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1201
1202         index = tx_pool->free_map[tx_pool->consumer_index];
1203         offset = index * adapter->req_mtu;
1204         dst = tx_pool->long_term_buff.buff + offset;
1205         memset(dst, 0, adapter->req_mtu);
1206         skb_copy_from_linear_data(skb, dst, skb->len);
1207         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1208
1209         tx_pool->consumer_index =
1210             (tx_pool->consumer_index + 1) %
1211                 adapter->req_tx_entries_per_subcrq;
1212
1213         tx_buff = &tx_pool->tx_buff[index];
1214         tx_buff->skb = skb;
1215         tx_buff->data_dma[0] = data_dma_addr;
1216         tx_buff->data_len[0] = skb->len;
1217         tx_buff->index = index;
1218         tx_buff->pool_index = queue_num;
1219         tx_buff->last_frag = true;
1220
1221         memset(&tx_crq, 0, sizeof(tx_crq));
1222         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1223         tx_crq.v1.type = IBMVNIC_TX_DESC;
1224         tx_crq.v1.n_crq_elem = 1;
1225         tx_crq.v1.n_sge = 1;
1226         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1227         tx_crq.v1.correlator = cpu_to_be32(index);
1228         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1229         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1230         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1231
1232         if (adapter->vlan_header_insertion) {
1233                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1234                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1235         }
1236
1237         if (skb->protocol == htons(ETH_P_IP)) {
1238                 if (ip_hdr(skb)->version == 4)
1239                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1240                 else if (ip_hdr(skb)->version == 6)
1241                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1242
1243                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1244                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1245                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1246                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1247         }
1248
1249         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1250                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1251                 hdrs += 2;
1252         }
1253         /* determine if l2/3/4 headers are sent to firmware */
1254         if ((*hdrs >> 7) & 1 &&
1255             (skb->protocol == htons(ETH_P_IP) ||
1256              skb->protocol == htons(ETH_P_IPV6))) {
1257                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1258                 tx_crq.v1.n_crq_elem = num_entries;
1259                 tx_buff->indir_arr[0] = tx_crq;
1260                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1261                                                     sizeof(tx_buff->indir_arr),
1262                                                     DMA_TO_DEVICE);
1263                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1264                         dev_kfree_skb_any(skb);
1265                         tx_buff->skb = NULL;
1266                         if (!firmware_has_feature(FW_FEATURE_CMO))
1267                                 dev_err(dev, "tx: unable to map descriptor array\n");
1268                         tx_map_failed++;
1269                         tx_dropped++;
1270                         ret = NETDEV_TX_OK;
1271                         goto out;
1272                 }
1273                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1274                                                (u64)tx_buff->indir_dma,
1275                                                (u64)num_entries);
1276         } else {
1277                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1278                                       &tx_crq);
1279         }
1280         if (lpar_rc != H_SUCCESS) {
1281                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1282
1283                 if (tx_pool->consumer_index == 0)
1284                         tx_pool->consumer_index =
1285                                 adapter->req_tx_entries_per_subcrq - 1;
1286                 else
1287                         tx_pool->consumer_index--;
1288
1289                 dev_kfree_skb_any(skb);
1290                 tx_buff->skb = NULL;
1291
1292                 if (lpar_rc == H_CLOSED) {
1293                         /* Disable TX and report carrier off if queue is closed.
1294                          * Firmware guarantees that a signal will be sent to the
1295                          * driver, triggering a reset or some other action.
1296                          */
1297                         netif_tx_stop_all_queues(netdev);
1298                         netif_carrier_off(netdev);
1299                 }
1300
1301                 tx_send_failed++;
1302                 tx_dropped++;
1303                 ret = NETDEV_TX_OK;
1304                 goto out;
1305         }
1306
1307         if (atomic_inc_return(&tx_scrq->used)
1308                                         >= adapter->req_tx_entries_per_subcrq) {
1309                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1310                 netif_stop_subqueue(netdev, queue_num);
1311         }
1312
1313         tx_packets++;
1314         tx_bytes += skb->len;
1315         txq->trans_start = jiffies;
1316         ret = NETDEV_TX_OK;
1317
1318 out:
1319         netdev->stats.tx_dropped += tx_dropped;
1320         netdev->stats.tx_bytes += tx_bytes;
1321         netdev->stats.tx_packets += tx_packets;
1322         adapter->tx_send_failed += tx_send_failed;
1323         adapter->tx_map_failed += tx_map_failed;
1324         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1325         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1326         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1327
1328         return ret;
1329 }
1330
1331 static void ibmvnic_set_multi(struct net_device *netdev)
1332 {
1333         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1334         struct netdev_hw_addr *ha;
1335         union ibmvnic_crq crq;
1336
1337         memset(&crq, 0, sizeof(crq));
1338         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1339         crq.request_capability.cmd = REQUEST_CAPABILITY;
1340
1341         if (netdev->flags & IFF_PROMISC) {
1342                 if (!adapter->promisc_supported)
1343                         return;
1344         } else {
1345                 if (netdev->flags & IFF_ALLMULTI) {
1346                         /* Accept all multicast */
1347                         memset(&crq, 0, sizeof(crq));
1348                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1349                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1350                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1351                         ibmvnic_send_crq(adapter, &crq);
1352                 } else if (netdev_mc_empty(netdev)) {
1353                         /* Reject all multicast */
1354                         memset(&crq, 0, sizeof(crq));
1355                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1356                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1357                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1358                         ibmvnic_send_crq(adapter, &crq);
1359                 } else {
1360                         /* Accept one or more multicast(s) */
1361                         netdev_for_each_mc_addr(ha, netdev) {
1362                                 memset(&crq, 0, sizeof(crq));
1363                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1364                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1365                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1366                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1367                                                 ha->addr);
1368                                 ibmvnic_send_crq(adapter, &crq);
1369                         }
1370                 }
1371         }
1372 }
1373
1374 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1375 {
1376         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1377         struct sockaddr *addr = p;
1378         union ibmvnic_crq crq;
1379
1380         if (!is_valid_ether_addr(addr->sa_data))
1381                 return -EADDRNOTAVAIL;
1382
1383         memset(&crq, 0, sizeof(crq));
1384         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1385         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1386         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1387         ibmvnic_send_crq(adapter, &crq);
1388         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1389         return 0;
1390 }
1391
1392 /**
1393  * do_reset returns zero if we are able to keep processing reset events, or
1394  * non-zero if we hit a fatal error and must halt.
1395  */
1396 static int do_reset(struct ibmvnic_adapter *adapter,
1397                     struct ibmvnic_rwi *rwi, u32 reset_state)
1398 {
1399         struct net_device *netdev = adapter->netdev;
1400         int i, rc;
1401
1402         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1403                    rwi->reset_reason);
1404
1405         netif_carrier_off(netdev);
1406         adapter->reset_reason = rwi->reset_reason;
1407
1408         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1409                 rc = ibmvnic_reenable_crq_queue(adapter);
1410                 if (rc)
1411                         return 0;
1412         }
1413
1414         rc = __ibmvnic_close(netdev);
1415         if (rc)
1416                 return rc;
1417
1418         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1419                 /* remove the closed state so when we call open it appears
1420                  * we are coming from the probed state.
1421                  */
1422                 adapter->state = VNIC_PROBED;
1423
1424                 rc = ibmvnic_init(adapter);
1425                 if (rc)
1426                         return 0;
1427
1428                 /* If the adapter was in PROBE state prior to the reset,
1429                  * exit here.
1430                  */
1431                 if (reset_state == VNIC_PROBED)
1432                         return 0;
1433
1434                 rc = ibmvnic_login(netdev);
1435                 if (rc) {
1436                         adapter->state = VNIC_PROBED;
1437                         return 0;
1438                 }
1439
1440                 rc = reset_tx_pools(adapter);
1441                 if (rc)
1442                         return rc;
1443
1444                 rc = reset_rx_pools(adapter);
1445                 if (rc)
1446                         return rc;
1447
1448                 if (reset_state == VNIC_CLOSED)
1449                         return 0;
1450         }
1451
1452         rc = __ibmvnic_open(netdev);
1453         if (rc) {
1454                 if (list_empty(&adapter->rwi_list))
1455                         adapter->state = VNIC_CLOSED;
1456                 else
1457                         adapter->state = reset_state;
1458
1459                 return 0;
1460         }
1461
1462         netif_carrier_on(netdev);
1463
1464         /* kick napi */
1465         for (i = 0; i < adapter->req_rx_queues; i++)
1466                 napi_schedule(&adapter->napi[i]);
1467
1468         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1469                 netdev_notify_peers(netdev);
1470
1471         return 0;
1472 }
1473
1474 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1475 {
1476         struct ibmvnic_rwi *rwi;
1477
1478         mutex_lock(&adapter->rwi_lock);
1479
1480         if (!list_empty(&adapter->rwi_list)) {
1481                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1482                                        list);
1483                 list_del(&rwi->list);
1484         } else {
1485                 rwi = NULL;
1486         }
1487
1488         mutex_unlock(&adapter->rwi_lock);
1489         return rwi;
1490 }
1491
1492 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1493 {
1494         struct ibmvnic_rwi *rwi;
1495
1496         rwi = get_next_rwi(adapter);
1497         while (rwi) {
1498                 kfree(rwi);
1499                 rwi = get_next_rwi(adapter);
1500         }
1501 }
1502
1503 static void __ibmvnic_reset(struct work_struct *work)
1504 {
1505         struct ibmvnic_rwi *rwi;
1506         struct ibmvnic_adapter *adapter;
1507         struct net_device *netdev;
1508         u32 reset_state;
1509         int rc;
1510
1511         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1512         netdev = adapter->netdev;
1513
1514         mutex_lock(&adapter->reset_lock);
1515         adapter->resetting = true;
1516         reset_state = adapter->state;
1517
1518         rwi = get_next_rwi(adapter);
1519         while (rwi) {
1520                 rc = do_reset(adapter, rwi, reset_state);
1521                 kfree(rwi);
1522                 if (rc)
1523                         break;
1524
1525                 rwi = get_next_rwi(adapter);
1526         }
1527
1528         if (rc) {
1529                 netdev_dbg(adapter->netdev, "Reset failed\n");
1530                 free_all_rwi(adapter);
1531                 mutex_unlock(&adapter->reset_lock);
1532                 return;
1533         }
1534
1535         adapter->resetting = false;
1536         mutex_unlock(&adapter->reset_lock);
1537 }
1538
1539 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1540                           enum ibmvnic_reset_reason reason)
1541 {
1542         struct ibmvnic_rwi *rwi, *tmp;
1543         struct net_device *netdev = adapter->netdev;
1544         struct list_head *entry;
1545
1546         if (adapter->state == VNIC_REMOVING ||
1547             adapter->state == VNIC_REMOVED) {
1548                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1549                 return;
1550         }
1551
1552         if (adapter->state == VNIC_PROBING) {
1553                 netdev_warn(netdev, "Adapter reset during probe\n");
1554                 adapter->init_done_rc = EAGAIN;
1555                 return;
1556         }
1557
1558         mutex_lock(&adapter->rwi_lock);
1559
1560         list_for_each(entry, &adapter->rwi_list) {
1561                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1562                 if (tmp->reset_reason == reason) {
1563                         netdev_dbg(netdev, "Skipping matching reset\n");
1564                         mutex_unlock(&adapter->rwi_lock);
1565                         return;
1566                 }
1567         }
1568
1569         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1570         if (!rwi) {
1571                 mutex_unlock(&adapter->rwi_lock);
1572                 ibmvnic_close(netdev);
1573                 return;
1574         }
1575
1576         rwi->reset_reason = reason;
1577         list_add_tail(&rwi->list, &adapter->rwi_list);
1578         mutex_unlock(&adapter->rwi_lock);
1579
1580         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1581         schedule_work(&adapter->ibmvnic_reset);
1582 }
1583
1584 static void ibmvnic_tx_timeout(struct net_device *dev)
1585 {
1586         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1587
1588         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1589 }
1590
1591 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1592                                   struct ibmvnic_rx_buff *rx_buff)
1593 {
1594         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1595
1596         rx_buff->skb = NULL;
1597
1598         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1599         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1600
1601         atomic_dec(&pool->available);
1602 }
1603
1604 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1605 {
1606         struct net_device *netdev = napi->dev;
1607         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1608         int scrq_num = (int)(napi - adapter->napi);
1609         int frames_processed = 0;
1610
1611 restart_poll:
1612         while (frames_processed < budget) {
1613                 struct sk_buff *skb;
1614                 struct ibmvnic_rx_buff *rx_buff;
1615                 union sub_crq *next;
1616                 u32 length;
1617                 u16 offset;
1618                 u8 flags = 0;
1619
1620                 if (unlikely(adapter->resetting)) {
1621                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1622                         napi_complete_done(napi, frames_processed);
1623                         return frames_processed;
1624                 }
1625
1626                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1627                         break;
1628                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1629                 rx_buff =
1630                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1631                                                           rx_comp.correlator);
1632                 /* do error checking */
1633                 if (next->rx_comp.rc) {
1634                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1635                                    be16_to_cpu(next->rx_comp.rc));
1636                         /* free the entry */
1637                         next->rx_comp.first = 0;
1638                         remove_buff_from_pool(adapter, rx_buff);
1639                         continue;
1640                 }
1641
1642                 length = be32_to_cpu(next->rx_comp.len);
1643                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1644                 flags = next->rx_comp.flags;
1645                 skb = rx_buff->skb;
1646                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1647                                         length);
1648
1649                 /* VLAN Header has been stripped by the system firmware and
1650                  * needs to be inserted by the driver
1651                  */
1652                 if (adapter->rx_vlan_header_insertion &&
1653                     (flags & IBMVNIC_VLAN_STRIPPED))
1654                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1655                                                ntohs(next->rx_comp.vlan_tci));
1656
1657                 /* free the entry */
1658                 next->rx_comp.first = 0;
1659                 remove_buff_from_pool(adapter, rx_buff);
1660
1661                 skb_put(skb, length);
1662                 skb->protocol = eth_type_trans(skb, netdev);
1663                 skb_record_rx_queue(skb, scrq_num);
1664
1665                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1666                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1667                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1668                 }
1669
1670                 length = skb->len;
1671                 napi_gro_receive(napi, skb); /* send it up */
1672                 netdev->stats.rx_packets++;
1673                 netdev->stats.rx_bytes += length;
1674                 adapter->rx_stats_buffers[scrq_num].packets++;
1675                 adapter->rx_stats_buffers[scrq_num].bytes += length;
1676                 frames_processed++;
1677         }
1678
1679         if (adapter->state != VNIC_CLOSING)
1680                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1681
1682         if (frames_processed < budget) {
1683                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1684                 napi_complete_done(napi, frames_processed);
1685                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1686                     napi_reschedule(napi)) {
1687                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1688                         goto restart_poll;
1689                 }
1690         }
1691         return frames_processed;
1692 }
1693
1694 #ifdef CONFIG_NET_POLL_CONTROLLER
1695 static void ibmvnic_netpoll_controller(struct net_device *dev)
1696 {
1697         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1698         int i;
1699
1700         replenish_pools(netdev_priv(dev));
1701         for (i = 0; i < adapter->req_rx_queues; i++)
1702                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1703                                      adapter->rx_scrq[i]);
1704 }
1705 #endif
1706
1707 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1708 {
1709         return -EOPNOTSUPP;
1710 }
1711
1712 static const struct net_device_ops ibmvnic_netdev_ops = {
1713         .ndo_open               = ibmvnic_open,
1714         .ndo_stop               = ibmvnic_close,
1715         .ndo_start_xmit         = ibmvnic_xmit,
1716         .ndo_set_rx_mode        = ibmvnic_set_multi,
1717         .ndo_set_mac_address    = ibmvnic_set_mac,
1718         .ndo_validate_addr      = eth_validate_addr,
1719         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1720 #ifdef CONFIG_NET_POLL_CONTROLLER
1721         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1722 #endif
1723         .ndo_change_mtu         = ibmvnic_change_mtu,
1724 };
1725
1726 /* ethtool functions */
1727
1728 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1729                                       struct ethtool_link_ksettings *cmd)
1730 {
1731         u32 supported, advertising;
1732
1733         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1734                           SUPPORTED_FIBRE);
1735         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1736                             ADVERTISED_FIBRE);
1737         cmd->base.speed = SPEED_1000;
1738         cmd->base.duplex = DUPLEX_FULL;
1739         cmd->base.port = PORT_FIBRE;
1740         cmd->base.phy_address = 0;
1741         cmd->base.autoneg = AUTONEG_ENABLE;
1742
1743         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1744                                                 supported);
1745         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1746                                                 advertising);
1747
1748         return 0;
1749 }
1750
1751 static void ibmvnic_get_drvinfo(struct net_device *dev,
1752                                 struct ethtool_drvinfo *info)
1753 {
1754         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1755         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1756 }
1757
1758 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1759 {
1760         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1761
1762         return adapter->msg_enable;
1763 }
1764
1765 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1766 {
1767         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1768
1769         adapter->msg_enable = data;
1770 }
1771
1772 static u32 ibmvnic_get_link(struct net_device *netdev)
1773 {
1774         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1775
1776         /* Don't need to send a query because we request a logical link up at
1777          * init and then we wait for link state indications
1778          */
1779         return adapter->logical_link_state;
1780 }
1781
1782 static void ibmvnic_get_ringparam(struct net_device *netdev,
1783                                   struct ethtool_ringparam *ring)
1784 {
1785         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1786
1787         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
1788         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
1789         ring->rx_mini_max_pending = 0;
1790         ring->rx_jumbo_max_pending = 0;
1791         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
1792         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
1793         ring->rx_mini_pending = 0;
1794         ring->rx_jumbo_pending = 0;
1795 }
1796
1797 static void ibmvnic_get_channels(struct net_device *netdev,
1798                                  struct ethtool_channels *channels)
1799 {
1800         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1801
1802         channels->max_rx = adapter->max_rx_queues;
1803         channels->max_tx = adapter->max_tx_queues;
1804         channels->max_other = 0;
1805         channels->max_combined = 0;
1806         channels->rx_count = adapter->req_rx_queues;
1807         channels->tx_count = adapter->req_tx_queues;
1808         channels->other_count = 0;
1809         channels->combined_count = 0;
1810 }
1811
1812 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1813 {
1814         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1815         int i;
1816
1817         if (stringset != ETH_SS_STATS)
1818                 return;
1819
1820         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1821                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1822
1823         for (i = 0; i < adapter->req_tx_queues; i++) {
1824                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
1825                 data += ETH_GSTRING_LEN;
1826
1827                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
1828                 data += ETH_GSTRING_LEN;
1829
1830                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
1831                 data += ETH_GSTRING_LEN;
1832         }
1833
1834         for (i = 0; i < adapter->req_rx_queues; i++) {
1835                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
1836                 data += ETH_GSTRING_LEN;
1837
1838                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
1839                 data += ETH_GSTRING_LEN;
1840
1841                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
1842                 data += ETH_GSTRING_LEN;
1843         }
1844 }
1845
1846 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1847 {
1848         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1849
1850         switch (sset) {
1851         case ETH_SS_STATS:
1852                 return ARRAY_SIZE(ibmvnic_stats) +
1853                        adapter->req_tx_queues * NUM_TX_STATS +
1854                        adapter->req_rx_queues * NUM_RX_STATS;
1855         default:
1856                 return -EOPNOTSUPP;
1857         }
1858 }
1859
1860 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1861                                       struct ethtool_stats *stats, u64 *data)
1862 {
1863         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1864         union ibmvnic_crq crq;
1865         int i, j;
1866
1867         memset(&crq, 0, sizeof(crq));
1868         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1869         crq.request_statistics.cmd = REQUEST_STATISTICS;
1870         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1871         crq.request_statistics.len =
1872             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1873
1874         /* Wait for data to be written */
1875         init_completion(&adapter->stats_done);
1876         ibmvnic_send_crq(adapter, &crq);
1877         wait_for_completion(&adapter->stats_done);
1878
1879         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1880                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
1881                                                 ibmvnic_stats[i].offset));
1882
1883         for (j = 0; j < adapter->req_tx_queues; j++) {
1884                 data[i] = adapter->tx_stats_buffers[j].packets;
1885                 i++;
1886                 data[i] = adapter->tx_stats_buffers[j].bytes;
1887                 i++;
1888                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
1889                 i++;
1890         }
1891
1892         for (j = 0; j < adapter->req_rx_queues; j++) {
1893                 data[i] = adapter->rx_stats_buffers[j].packets;
1894                 i++;
1895                 data[i] = adapter->rx_stats_buffers[j].bytes;
1896                 i++;
1897                 data[i] = adapter->rx_stats_buffers[j].interrupts;
1898                 i++;
1899         }
1900 }
1901
1902 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1903         .get_drvinfo            = ibmvnic_get_drvinfo,
1904         .get_msglevel           = ibmvnic_get_msglevel,
1905         .set_msglevel           = ibmvnic_set_msglevel,
1906         .get_link               = ibmvnic_get_link,
1907         .get_ringparam          = ibmvnic_get_ringparam,
1908         .get_channels           = ibmvnic_get_channels,
1909         .get_strings            = ibmvnic_get_strings,
1910         .get_sset_count         = ibmvnic_get_sset_count,
1911         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1912         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1913 };
1914
1915 /* Routines for managing CRQs/sCRQs  */
1916
1917 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
1918                                    struct ibmvnic_sub_crq_queue *scrq)
1919 {
1920         int rc;
1921
1922         if (scrq->irq) {
1923                 free_irq(scrq->irq, scrq);
1924                 irq_dispose_mapping(scrq->irq);
1925                 scrq->irq = 0;
1926         }
1927
1928         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1929         scrq->cur = 0;
1930
1931         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1932                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1933         return rc;
1934 }
1935
1936 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
1937 {
1938         int i, rc;
1939
1940         for (i = 0; i < adapter->req_tx_queues; i++) {
1941                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
1942                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1943                 if (rc)
1944                         return rc;
1945         }
1946
1947         for (i = 0; i < adapter->req_rx_queues; i++) {
1948                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
1949                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1950                 if (rc)
1951                         return rc;
1952         }
1953
1954         return rc;
1955 }
1956
1957 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1958                                   struct ibmvnic_sub_crq_queue *scrq)
1959 {
1960         struct device *dev = &adapter->vdev->dev;
1961         long rc;
1962
1963         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1964
1965         /* Close the sub-crqs */
1966         do {
1967                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1968                                         adapter->vdev->unit_address,
1969                                         scrq->crq_num);
1970         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1971
1972         if (rc) {
1973                 netdev_err(adapter->netdev,
1974                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
1975                            scrq->crq_num, rc);
1976         }
1977
1978         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1979                          DMA_BIDIRECTIONAL);
1980         free_pages((unsigned long)scrq->msgs, 2);
1981         kfree(scrq);
1982 }
1983
1984 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1985                                                         *adapter)
1986 {
1987         struct device *dev = &adapter->vdev->dev;
1988         struct ibmvnic_sub_crq_queue *scrq;
1989         int rc;
1990
1991         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1992         if (!scrq)
1993                 return NULL;
1994
1995         scrq->msgs =
1996                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1997         if (!scrq->msgs) {
1998                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1999                 goto zero_page_failed;
2000         }
2001
2002         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2003                                          DMA_BIDIRECTIONAL);
2004         if (dma_mapping_error(dev, scrq->msg_token)) {
2005                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2006                 goto map_failed;
2007         }
2008
2009         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2010                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2011
2012         if (rc == H_RESOURCE)
2013                 rc = ibmvnic_reset_crq(adapter);
2014
2015         if (rc == H_CLOSED) {
2016                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2017         } else if (rc) {
2018                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2019                 goto reg_failed;
2020         }
2021
2022         scrq->adapter = adapter;
2023         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2024         spin_lock_init(&scrq->lock);
2025
2026         netdev_dbg(adapter->netdev,
2027                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2028                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2029
2030         return scrq;
2031
2032 reg_failed:
2033         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2034                          DMA_BIDIRECTIONAL);
2035 map_failed:
2036         free_pages((unsigned long)scrq->msgs, 2);
2037 zero_page_failed:
2038         kfree(scrq);
2039
2040         return NULL;
2041 }
2042
2043 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2044 {
2045         int i;
2046
2047         if (adapter->tx_scrq) {
2048                 for (i = 0; i < adapter->req_tx_queues; i++) {
2049                         if (!adapter->tx_scrq[i])
2050                                 continue;
2051
2052                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2053                                    i);
2054                         if (adapter->tx_scrq[i]->irq) {
2055                                 free_irq(adapter->tx_scrq[i]->irq,
2056                                          adapter->tx_scrq[i]);
2057                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2058                                 adapter->tx_scrq[i]->irq = 0;
2059                         }
2060
2061                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2062                 }
2063
2064                 kfree(adapter->tx_scrq);
2065                 adapter->tx_scrq = NULL;
2066         }
2067
2068         if (adapter->rx_scrq) {
2069                 for (i = 0; i < adapter->req_rx_queues; i++) {
2070                         if (!adapter->rx_scrq[i])
2071                                 continue;
2072
2073                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2074                                    i);
2075                         if (adapter->rx_scrq[i]->irq) {
2076                                 free_irq(adapter->rx_scrq[i]->irq,
2077                                          adapter->rx_scrq[i]);
2078                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2079                                 adapter->rx_scrq[i]->irq = 0;
2080                         }
2081
2082                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2083                 }
2084
2085                 kfree(adapter->rx_scrq);
2086                 adapter->rx_scrq = NULL;
2087         }
2088 }
2089
2090 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2091                             struct ibmvnic_sub_crq_queue *scrq)
2092 {
2093         struct device *dev = &adapter->vdev->dev;
2094         unsigned long rc;
2095
2096         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2097                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2098         if (rc)
2099                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2100                         scrq->hw_irq, rc);
2101         return rc;
2102 }
2103
2104 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2105                            struct ibmvnic_sub_crq_queue *scrq)
2106 {
2107         struct device *dev = &adapter->vdev->dev;
2108         unsigned long rc;
2109
2110         if (scrq->hw_irq > 0x100000000ULL) {
2111                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2112                 return 1;
2113         }
2114
2115         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2116                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2117         if (rc)
2118                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2119                         scrq->hw_irq, rc);
2120         return rc;
2121 }
2122
2123 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2124                                struct ibmvnic_sub_crq_queue *scrq)
2125 {
2126         struct device *dev = &adapter->vdev->dev;
2127         struct ibmvnic_tx_buff *txbuff;
2128         union sub_crq *next;
2129         int index;
2130         int i, j;
2131         u8 first;
2132
2133 restart_loop:
2134         while (pending_scrq(adapter, scrq)) {
2135                 unsigned int pool = scrq->pool_index;
2136
2137                 next = ibmvnic_next_scrq(adapter, scrq);
2138                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2139                         if (next->tx_comp.rcs[i]) {
2140                                 dev_err(dev, "tx error %x\n",
2141                                         next->tx_comp.rcs[i]);
2142                                 continue;
2143                         }
2144                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2145                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2146
2147                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2148                                 if (!txbuff->data_dma[j])
2149                                         continue;
2150
2151                                 txbuff->data_dma[j] = 0;
2152                         }
2153                         /* if sub_crq was sent indirectly */
2154                         first = txbuff->indir_arr[0].generic.first;
2155                         if (first == IBMVNIC_CRQ_CMD) {
2156                                 dma_unmap_single(dev, txbuff->indir_dma,
2157                                                  sizeof(txbuff->indir_arr),
2158                                                  DMA_TO_DEVICE);
2159                         }
2160
2161                         if (txbuff->last_frag) {
2162                                 dev_kfree_skb_any(txbuff->skb);
2163                                 txbuff->skb = NULL;
2164                         }
2165
2166                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2167                                                      producer_index] = index;
2168                         adapter->tx_pool[pool].producer_index =
2169                             (adapter->tx_pool[pool].producer_index + 1) %
2170                             adapter->req_tx_entries_per_subcrq;
2171                 }
2172                 /* remove tx_comp scrq*/
2173                 next->tx_comp.first = 0;
2174
2175                 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2176                     (adapter->req_tx_entries_per_subcrq / 2) &&
2177                     __netif_subqueue_stopped(adapter->netdev,
2178                                              scrq->pool_index)) {
2179                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2180                         netdev_info(adapter->netdev, "Started queue %d\n",
2181                                     scrq->pool_index);
2182                 }
2183         }
2184
2185         enable_scrq_irq(adapter, scrq);
2186
2187         if (pending_scrq(adapter, scrq)) {
2188                 disable_scrq_irq(adapter, scrq);
2189                 goto restart_loop;
2190         }
2191
2192         return 0;
2193 }
2194
2195 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2196 {
2197         struct ibmvnic_sub_crq_queue *scrq = instance;
2198         struct ibmvnic_adapter *adapter = scrq->adapter;
2199
2200         disable_scrq_irq(adapter, scrq);
2201         ibmvnic_complete_tx(adapter, scrq);
2202
2203         return IRQ_HANDLED;
2204 }
2205
2206 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2207 {
2208         struct ibmvnic_sub_crq_queue *scrq = instance;
2209         struct ibmvnic_adapter *adapter = scrq->adapter;
2210
2211         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2212
2213         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2214                 disable_scrq_irq(adapter, scrq);
2215                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2216         }
2217
2218         return IRQ_HANDLED;
2219 }
2220
2221 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2222 {
2223         struct device *dev = &adapter->vdev->dev;
2224         struct ibmvnic_sub_crq_queue *scrq;
2225         int i = 0, j = 0;
2226         int rc = 0;
2227
2228         for (i = 0; i < adapter->req_tx_queues; i++) {
2229                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2230                            i);
2231                 scrq = adapter->tx_scrq[i];
2232                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2233
2234                 if (!scrq->irq) {
2235                         rc = -EINVAL;
2236                         dev_err(dev, "Error mapping irq\n");
2237                         goto req_tx_irq_failed;
2238                 }
2239
2240                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2241                                  0, "ibmvnic_tx", scrq);
2242
2243                 if (rc) {
2244                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2245                                 scrq->irq, rc);
2246                         irq_dispose_mapping(scrq->irq);
2247                         goto req_rx_irq_failed;
2248                 }
2249         }
2250
2251         for (i = 0; i < adapter->req_rx_queues; i++) {
2252                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2253                            i);
2254                 scrq = adapter->rx_scrq[i];
2255                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2256                 if (!scrq->irq) {
2257                         rc = -EINVAL;
2258                         dev_err(dev, "Error mapping irq\n");
2259                         goto req_rx_irq_failed;
2260                 }
2261                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2262                                  0, "ibmvnic_rx", scrq);
2263                 if (rc) {
2264                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2265                                 scrq->irq, rc);
2266                         irq_dispose_mapping(scrq->irq);
2267                         goto req_rx_irq_failed;
2268                 }
2269         }
2270         return rc;
2271
2272 req_rx_irq_failed:
2273         for (j = 0; j < i; j++) {
2274                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2275                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2276         }
2277         i = adapter->req_tx_queues;
2278 req_tx_irq_failed:
2279         for (j = 0; j < i; j++) {
2280                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2281                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2282         }
2283         release_sub_crqs(adapter);
2284         return rc;
2285 }
2286
2287 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2288 {
2289         struct device *dev = &adapter->vdev->dev;
2290         struct ibmvnic_sub_crq_queue **allqueues;
2291         int registered_queues = 0;
2292         int total_queues;
2293         int more = 0;
2294         int i;
2295
2296         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2297
2298         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2299         if (!allqueues)
2300                 return -1;
2301
2302         for (i = 0; i < total_queues; i++) {
2303                 allqueues[i] = init_sub_crq_queue(adapter);
2304                 if (!allqueues[i]) {
2305                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2306                         break;
2307                 }
2308                 registered_queues++;
2309         }
2310
2311         /* Make sure we were able to register the minimum number of queues */
2312         if (registered_queues <
2313             adapter->min_tx_queues + adapter->min_rx_queues) {
2314                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2315                 goto tx_failed;
2316         }
2317
2318         /* Distribute the failed allocated queues*/
2319         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2320                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2321                 switch (i % 3) {
2322                 case 0:
2323                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2324                                 adapter->req_rx_queues--;
2325                         else
2326                                 more++;
2327                         break;
2328                 case 1:
2329                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2330                                 adapter->req_tx_queues--;
2331                         else
2332                                 more++;
2333                         break;
2334                 }
2335         }
2336
2337         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2338                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2339         if (!adapter->tx_scrq)
2340                 goto tx_failed;
2341
2342         for (i = 0; i < adapter->req_tx_queues; i++) {
2343                 adapter->tx_scrq[i] = allqueues[i];
2344                 adapter->tx_scrq[i]->pool_index = i;
2345         }
2346
2347         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2348                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2349         if (!adapter->rx_scrq)
2350                 goto rx_failed;
2351
2352         for (i = 0; i < adapter->req_rx_queues; i++) {
2353                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2354                 adapter->rx_scrq[i]->scrq_num = i;
2355         }
2356
2357         kfree(allqueues);
2358         return 0;
2359
2360 rx_failed:
2361         kfree(adapter->tx_scrq);
2362         adapter->tx_scrq = NULL;
2363 tx_failed:
2364         for (i = 0; i < registered_queues; i++)
2365                 release_sub_crq_queue(adapter, allqueues[i]);
2366         kfree(allqueues);
2367         return -1;
2368 }
2369
2370 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2371 {
2372         struct device *dev = &adapter->vdev->dev;
2373         union ibmvnic_crq crq;
2374
2375         if (!retry) {
2376                 /* Sub-CRQ entries are 32 byte long */
2377                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2378
2379                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2380                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2381                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2382                         return;
2383                 }
2384
2385                 /* Get the minimum between the queried max and the entries
2386                  * that fit in our PAGE_SIZE
2387                  */
2388                 adapter->req_tx_entries_per_subcrq =
2389                     adapter->max_tx_entries_per_subcrq > entries_page ?
2390                     entries_page : adapter->max_tx_entries_per_subcrq;
2391                 adapter->req_rx_add_entries_per_subcrq =
2392                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
2393                     entries_page : adapter->max_rx_add_entries_per_subcrq;
2394
2395                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2396                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2397                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2398
2399                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2400         }
2401
2402         memset(&crq, 0, sizeof(crq));
2403         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2404         crq.request_capability.cmd = REQUEST_CAPABILITY;
2405
2406         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2407         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2408         atomic_inc(&adapter->running_cap_crqs);
2409         ibmvnic_send_crq(adapter, &crq);
2410
2411         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2412         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2413         atomic_inc(&adapter->running_cap_crqs);
2414         ibmvnic_send_crq(adapter, &crq);
2415
2416         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2417         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2418         atomic_inc(&adapter->running_cap_crqs);
2419         ibmvnic_send_crq(adapter, &crq);
2420
2421         crq.request_capability.capability =
2422             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2423         crq.request_capability.number =
2424             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2425         atomic_inc(&adapter->running_cap_crqs);
2426         ibmvnic_send_crq(adapter, &crq);
2427
2428         crq.request_capability.capability =
2429             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2430         crq.request_capability.number =
2431             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2432         atomic_inc(&adapter->running_cap_crqs);
2433         ibmvnic_send_crq(adapter, &crq);
2434
2435         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2436         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2437         atomic_inc(&adapter->running_cap_crqs);
2438         ibmvnic_send_crq(adapter, &crq);
2439
2440         if (adapter->netdev->flags & IFF_PROMISC) {
2441                 if (adapter->promisc_supported) {
2442                         crq.request_capability.capability =
2443                             cpu_to_be16(PROMISC_REQUESTED);
2444                         crq.request_capability.number = cpu_to_be64(1);
2445                         atomic_inc(&adapter->running_cap_crqs);
2446                         ibmvnic_send_crq(adapter, &crq);
2447                 }
2448         } else {
2449                 crq.request_capability.capability =
2450                     cpu_to_be16(PROMISC_REQUESTED);
2451                 crq.request_capability.number = cpu_to_be64(0);
2452                 atomic_inc(&adapter->running_cap_crqs);
2453                 ibmvnic_send_crq(adapter, &crq);
2454         }
2455 }
2456
2457 static int pending_scrq(struct ibmvnic_adapter *adapter,
2458                         struct ibmvnic_sub_crq_queue *scrq)
2459 {
2460         union sub_crq *entry = &scrq->msgs[scrq->cur];
2461
2462         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2463                 return 1;
2464         else
2465                 return 0;
2466 }
2467
2468 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2469                                         struct ibmvnic_sub_crq_queue *scrq)
2470 {
2471         union sub_crq *entry;
2472         unsigned long flags;
2473
2474         spin_lock_irqsave(&scrq->lock, flags);
2475         entry = &scrq->msgs[scrq->cur];
2476         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2477                 if (++scrq->cur == scrq->size)
2478                         scrq->cur = 0;
2479         } else {
2480                 entry = NULL;
2481         }
2482         spin_unlock_irqrestore(&scrq->lock, flags);
2483
2484         return entry;
2485 }
2486
2487 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2488 {
2489         struct ibmvnic_crq_queue *queue = &adapter->crq;
2490         union ibmvnic_crq *crq;
2491
2492         crq = &queue->msgs[queue->cur];
2493         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2494                 if (++queue->cur == queue->size)
2495                         queue->cur = 0;
2496         } else {
2497                 crq = NULL;
2498         }
2499
2500         return crq;
2501 }
2502
2503 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2504                        union sub_crq *sub_crq)
2505 {
2506         unsigned int ua = adapter->vdev->unit_address;
2507         struct device *dev = &adapter->vdev->dev;
2508         u64 *u64_crq = (u64 *)sub_crq;
2509         int rc;
2510
2511         netdev_dbg(adapter->netdev,
2512                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2513                    (unsigned long int)cpu_to_be64(remote_handle),
2514                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2515                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2516                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2517                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2518
2519         /* Make sure the hypervisor sees the complete request */
2520         mb();
2521
2522         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2523                                 cpu_to_be64(remote_handle),
2524                                 cpu_to_be64(u64_crq[0]),
2525                                 cpu_to_be64(u64_crq[1]),
2526                                 cpu_to_be64(u64_crq[2]),
2527                                 cpu_to_be64(u64_crq[3]));
2528
2529         if (rc) {
2530                 if (rc == H_CLOSED)
2531                         dev_warn(dev, "CRQ Queue closed\n");
2532                 dev_err(dev, "Send error (rc=%d)\n", rc);
2533         }
2534
2535         return rc;
2536 }
2537
2538 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2539                                 u64 remote_handle, u64 ioba, u64 num_entries)
2540 {
2541         unsigned int ua = adapter->vdev->unit_address;
2542         struct device *dev = &adapter->vdev->dev;
2543         int rc;
2544
2545         /* Make sure the hypervisor sees the complete request */
2546         mb();
2547         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2548                                 cpu_to_be64(remote_handle),
2549                                 ioba, num_entries);
2550
2551         if (rc) {
2552                 if (rc == H_CLOSED)
2553                         dev_warn(dev, "CRQ Queue closed\n");
2554                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2555         }
2556
2557         return rc;
2558 }
2559
2560 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2561                             union ibmvnic_crq *crq)
2562 {
2563         unsigned int ua = adapter->vdev->unit_address;
2564         struct device *dev = &adapter->vdev->dev;
2565         u64 *u64_crq = (u64 *)crq;
2566         int rc;
2567
2568         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2569                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2570                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2571
2572         /* Make sure the hypervisor sees the complete request */
2573         mb();
2574
2575         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2576                                 cpu_to_be64(u64_crq[0]),
2577                                 cpu_to_be64(u64_crq[1]));
2578
2579         if (rc) {
2580                 if (rc == H_CLOSED)
2581                         dev_warn(dev, "CRQ Queue closed\n");
2582                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2583         }
2584
2585         return rc;
2586 }
2587
2588 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2589 {
2590         union ibmvnic_crq crq;
2591
2592         memset(&crq, 0, sizeof(crq));
2593         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2594         crq.generic.cmd = IBMVNIC_CRQ_INIT;
2595         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2596
2597         return ibmvnic_send_crq(adapter, &crq);
2598 }
2599
2600 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2601 {
2602         union ibmvnic_crq crq;
2603
2604         memset(&crq, 0, sizeof(crq));
2605         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2606         crq.version_exchange.cmd = VERSION_EXCHANGE;
2607         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2608
2609         return ibmvnic_send_crq(adapter, &crq);
2610 }
2611
2612 static void send_login(struct ibmvnic_adapter *adapter)
2613 {
2614         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2615         struct ibmvnic_login_buffer *login_buffer;
2616         struct device *dev = &adapter->vdev->dev;
2617         dma_addr_t rsp_buffer_token;
2618         dma_addr_t buffer_token;
2619         size_t rsp_buffer_size;
2620         union ibmvnic_crq crq;
2621         size_t buffer_size;
2622         __be64 *tx_list_p;
2623         __be64 *rx_list_p;
2624         int i;
2625
2626         buffer_size =
2627             sizeof(struct ibmvnic_login_buffer) +
2628             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2629
2630         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2631         if (!login_buffer)
2632                 goto buf_alloc_failed;
2633
2634         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2635                                       DMA_TO_DEVICE);
2636         if (dma_mapping_error(dev, buffer_token)) {
2637                 dev_err(dev, "Couldn't map login buffer\n");
2638                 goto buf_map_failed;
2639         }
2640
2641         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2642                           sizeof(u64) * adapter->req_tx_queues +
2643                           sizeof(u64) * adapter->req_rx_queues +
2644                           sizeof(u64) * adapter->req_rx_queues +
2645                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2646
2647         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2648         if (!login_rsp_buffer)
2649                 goto buf_rsp_alloc_failed;
2650
2651         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2652                                           rsp_buffer_size, DMA_FROM_DEVICE);
2653         if (dma_mapping_error(dev, rsp_buffer_token)) {
2654                 dev_err(dev, "Couldn't map login rsp buffer\n");
2655                 goto buf_rsp_map_failed;
2656         }
2657
2658         adapter->login_buf = login_buffer;
2659         adapter->login_buf_token = buffer_token;
2660         adapter->login_buf_sz = buffer_size;
2661         adapter->login_rsp_buf = login_rsp_buffer;
2662         adapter->login_rsp_buf_token = rsp_buffer_token;
2663         adapter->login_rsp_buf_sz = rsp_buffer_size;
2664
2665         login_buffer->len = cpu_to_be32(buffer_size);
2666         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2667         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2668         login_buffer->off_txcomp_subcrqs =
2669             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2670         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2671         login_buffer->off_rxcomp_subcrqs =
2672             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2673                         sizeof(u64) * adapter->req_tx_queues);
2674         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2675         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2676
2677         tx_list_p = (__be64 *)((char *)login_buffer +
2678                                       sizeof(struct ibmvnic_login_buffer));
2679         rx_list_p = (__be64 *)((char *)login_buffer +
2680                                       sizeof(struct ibmvnic_login_buffer) +
2681                                       sizeof(u64) * adapter->req_tx_queues);
2682
2683         for (i = 0; i < adapter->req_tx_queues; i++) {
2684                 if (adapter->tx_scrq[i]) {
2685                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2686                                                    crq_num);
2687                 }
2688         }
2689
2690         for (i = 0; i < adapter->req_rx_queues; i++) {
2691                 if (adapter->rx_scrq[i]) {
2692                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2693                                                    crq_num);
2694                 }
2695         }
2696
2697         netdev_dbg(adapter->netdev, "Login Buffer:\n");
2698         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2699                 netdev_dbg(adapter->netdev, "%016lx\n",
2700                            ((unsigned long int *)(adapter->login_buf))[i]);
2701         }
2702
2703         memset(&crq, 0, sizeof(crq));
2704         crq.login.first = IBMVNIC_CRQ_CMD;
2705         crq.login.cmd = LOGIN;
2706         crq.login.ioba = cpu_to_be32(buffer_token);
2707         crq.login.len = cpu_to_be32(buffer_size);
2708         ibmvnic_send_crq(adapter, &crq);
2709
2710         return;
2711
2712 buf_rsp_map_failed:
2713         kfree(login_rsp_buffer);
2714 buf_rsp_alloc_failed:
2715         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2716 buf_map_failed:
2717         kfree(login_buffer);
2718 buf_alloc_failed:
2719         return;
2720 }
2721
2722 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2723                              u32 len, u8 map_id)
2724 {
2725         union ibmvnic_crq crq;
2726
2727         memset(&crq, 0, sizeof(crq));
2728         crq.request_map.first = IBMVNIC_CRQ_CMD;
2729         crq.request_map.cmd = REQUEST_MAP;
2730         crq.request_map.map_id = map_id;
2731         crq.request_map.ioba = cpu_to_be32(addr);
2732         crq.request_map.len = cpu_to_be32(len);
2733         ibmvnic_send_crq(adapter, &crq);
2734 }
2735
2736 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2737 {
2738         union ibmvnic_crq crq;
2739
2740         memset(&crq, 0, sizeof(crq));
2741         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2742         crq.request_unmap.cmd = REQUEST_UNMAP;
2743         crq.request_unmap.map_id = map_id;
2744         ibmvnic_send_crq(adapter, &crq);
2745 }
2746
2747 static void send_map_query(struct ibmvnic_adapter *adapter)
2748 {
2749         union ibmvnic_crq crq;
2750
2751         memset(&crq, 0, sizeof(crq));
2752         crq.query_map.first = IBMVNIC_CRQ_CMD;
2753         crq.query_map.cmd = QUERY_MAP;
2754         ibmvnic_send_crq(adapter, &crq);
2755 }
2756
2757 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2758 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2759 {
2760         union ibmvnic_crq crq;
2761
2762         atomic_set(&adapter->running_cap_crqs, 0);
2763         memset(&crq, 0, sizeof(crq));
2764         crq.query_capability.first = IBMVNIC_CRQ_CMD;
2765         crq.query_capability.cmd = QUERY_CAPABILITY;
2766
2767         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2768         atomic_inc(&adapter->running_cap_crqs);
2769         ibmvnic_send_crq(adapter, &crq);
2770
2771         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2772         atomic_inc(&adapter->running_cap_crqs);
2773         ibmvnic_send_crq(adapter, &crq);
2774
2775         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2776         atomic_inc(&adapter->running_cap_crqs);
2777         ibmvnic_send_crq(adapter, &crq);
2778
2779         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2780         atomic_inc(&adapter->running_cap_crqs);
2781         ibmvnic_send_crq(adapter, &crq);
2782
2783         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2784         atomic_inc(&adapter->running_cap_crqs);
2785         ibmvnic_send_crq(adapter, &crq);
2786
2787         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2788         atomic_inc(&adapter->running_cap_crqs);
2789         ibmvnic_send_crq(adapter, &crq);
2790
2791         crq.query_capability.capability =
2792             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2793         atomic_inc(&adapter->running_cap_crqs);
2794         ibmvnic_send_crq(adapter, &crq);
2795
2796         crq.query_capability.capability =
2797             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2798         atomic_inc(&adapter->running_cap_crqs);
2799         ibmvnic_send_crq(adapter, &crq);
2800
2801         crq.query_capability.capability =
2802             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2803         atomic_inc(&adapter->running_cap_crqs);
2804         ibmvnic_send_crq(adapter, &crq);
2805
2806         crq.query_capability.capability =
2807             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2808         atomic_inc(&adapter->running_cap_crqs);
2809         ibmvnic_send_crq(adapter, &crq);
2810
2811         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2812         atomic_inc(&adapter->running_cap_crqs);
2813         ibmvnic_send_crq(adapter, &crq);
2814
2815         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2816         atomic_inc(&adapter->running_cap_crqs);
2817         ibmvnic_send_crq(adapter, &crq);
2818
2819         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2820         atomic_inc(&adapter->running_cap_crqs);
2821         ibmvnic_send_crq(adapter, &crq);
2822
2823         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2824         atomic_inc(&adapter->running_cap_crqs);
2825         ibmvnic_send_crq(adapter, &crq);
2826
2827         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2828         atomic_inc(&adapter->running_cap_crqs);
2829         ibmvnic_send_crq(adapter, &crq);
2830
2831         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2832         atomic_inc(&adapter->running_cap_crqs);
2833         ibmvnic_send_crq(adapter, &crq);
2834
2835         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2836         atomic_inc(&adapter->running_cap_crqs);
2837         ibmvnic_send_crq(adapter, &crq);
2838
2839         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2840         atomic_inc(&adapter->running_cap_crqs);
2841         ibmvnic_send_crq(adapter, &crq);
2842
2843         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2844         atomic_inc(&adapter->running_cap_crqs);
2845         ibmvnic_send_crq(adapter, &crq);
2846
2847         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2848         atomic_inc(&adapter->running_cap_crqs);
2849         ibmvnic_send_crq(adapter, &crq);
2850
2851         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2852         atomic_inc(&adapter->running_cap_crqs);
2853         ibmvnic_send_crq(adapter, &crq);
2854
2855         crq.query_capability.capability =
2856                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2857         atomic_inc(&adapter->running_cap_crqs);
2858         ibmvnic_send_crq(adapter, &crq);
2859
2860         crq.query_capability.capability =
2861                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2862         atomic_inc(&adapter->running_cap_crqs);
2863         ibmvnic_send_crq(adapter, &crq);
2864
2865         crq.query_capability.capability =
2866                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2867         atomic_inc(&adapter->running_cap_crqs);
2868         ibmvnic_send_crq(adapter, &crq);
2869
2870         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2871         atomic_inc(&adapter->running_cap_crqs);
2872         ibmvnic_send_crq(adapter, &crq);
2873 }
2874
2875 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2876 {
2877         struct device *dev = &adapter->vdev->dev;
2878         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2879         union ibmvnic_crq crq;
2880         int i;
2881
2882         dma_unmap_single(dev, adapter->ip_offload_tok,
2883                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2884
2885         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2886         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2887                 netdev_dbg(adapter->netdev, "%016lx\n",
2888                            ((unsigned long int *)(buf))[i]);
2889
2890         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2891         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2892         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2893                    buf->tcp_ipv4_chksum);
2894         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2895                    buf->tcp_ipv6_chksum);
2896         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2897                    buf->udp_ipv4_chksum);
2898         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2899                    buf->udp_ipv6_chksum);
2900         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2901                    buf->large_tx_ipv4);
2902         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2903                    buf->large_tx_ipv6);
2904         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2905                    buf->large_rx_ipv4);
2906         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2907                    buf->large_rx_ipv6);
2908         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2909                    buf->max_ipv4_header_size);
2910         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2911                    buf->max_ipv6_header_size);
2912         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2913                    buf->max_tcp_header_size);
2914         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2915                    buf->max_udp_header_size);
2916         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2917                    buf->max_large_tx_size);
2918         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2919                    buf->max_large_rx_size);
2920         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2921                    buf->ipv6_extension_header);
2922         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2923                    buf->tcp_pseudosum_req);
2924         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2925                    buf->num_ipv6_ext_headers);
2926         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2927                    buf->off_ipv6_ext_headers);
2928
2929         adapter->ip_offload_ctrl_tok =
2930             dma_map_single(dev, &adapter->ip_offload_ctrl,
2931                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2932
2933         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2934                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2935                 return;
2936         }
2937
2938         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2939         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2940         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2941         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2942         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2943
2944         /* large_tx/rx disabled for now, additional features needed */
2945         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2946         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2947         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2948         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2949
2950         adapter->netdev->features = NETIF_F_GSO;
2951
2952         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2953                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2954
2955         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2956                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2957
2958         if ((adapter->netdev->features &
2959             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2960                 adapter->netdev->features |= NETIF_F_RXCSUM;
2961
2962         memset(&crq, 0, sizeof(crq));
2963         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2964         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2965         crq.control_ip_offload.len =
2966             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2967         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2968         ibmvnic_send_crq(adapter, &crq);
2969 }
2970
2971 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2972                                   struct ibmvnic_adapter *adapter)
2973 {
2974         struct device *dev = &adapter->vdev->dev;
2975         struct ibmvnic_error_buff *error_buff, *tmp;
2976         unsigned long flags;
2977         bool found = false;
2978         int i;
2979
2980         if (!crq->request_error_rsp.rc.code) {
2981                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2982                          crq->request_error_rsp.rc.code);
2983                 return;
2984         }
2985
2986         spin_lock_irqsave(&adapter->error_list_lock, flags);
2987         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2988                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2989                         found = true;
2990                         list_del(&error_buff->list);
2991                         break;
2992                 }
2993         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2994
2995         if (!found) {
2996                 dev_err(dev, "Couldn't find error id %x\n",
2997                         be32_to_cpu(crq->request_error_rsp.error_id));
2998                 return;
2999         }
3000
3001         dev_err(dev, "Detailed info for error id %x:",
3002                 be32_to_cpu(crq->request_error_rsp.error_id));
3003
3004         for (i = 0; i < error_buff->len; i++) {
3005                 pr_cont("%02x", (int)error_buff->buff[i]);
3006                 if (i % 8 == 7)
3007                         pr_cont(" ");
3008         }
3009         pr_cont("\n");
3010
3011         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3012                          DMA_FROM_DEVICE);
3013         kfree(error_buff->buff);
3014         kfree(error_buff);
3015 }
3016
3017 static void request_error_information(struct ibmvnic_adapter *adapter,
3018                                       union ibmvnic_crq *err_crq)
3019 {
3020         struct device *dev = &adapter->vdev->dev;
3021         struct net_device *netdev = adapter->netdev;
3022         struct ibmvnic_error_buff *error_buff;
3023         unsigned long timeout = msecs_to_jiffies(30000);
3024         union ibmvnic_crq crq;
3025         unsigned long flags;
3026         int rc, detail_len;
3027
3028         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3029         if (!error_buff)
3030                 return;
3031
3032         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3033         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3034         if (!error_buff->buff) {
3035                 kfree(error_buff);
3036                 return;
3037         }
3038
3039         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3040                                          DMA_FROM_DEVICE);
3041         if (dma_mapping_error(dev, error_buff->dma)) {
3042                 netdev_err(netdev, "Couldn't map error buffer\n");
3043                 kfree(error_buff->buff);
3044                 kfree(error_buff);
3045                 return;
3046         }
3047
3048         error_buff->len = detail_len;
3049         error_buff->error_id = err_crq->error_indication.error_id;
3050
3051         spin_lock_irqsave(&adapter->error_list_lock, flags);
3052         list_add_tail(&error_buff->list, &adapter->errors);
3053         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3054
3055         memset(&crq, 0, sizeof(crq));
3056         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3057         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3058         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3059         crq.request_error_info.len = cpu_to_be32(detail_len);
3060         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3061
3062         rc = ibmvnic_send_crq(adapter, &crq);
3063         if (rc) {
3064                 netdev_err(netdev, "failed to request error information\n");
3065                 goto err_info_fail;
3066         }
3067
3068         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3069                 netdev_err(netdev, "timeout waiting for error information\n");
3070                 goto err_info_fail;
3071         }
3072
3073         return;
3074
3075 err_info_fail:
3076         spin_lock_irqsave(&adapter->error_list_lock, flags);
3077         list_del(&error_buff->list);
3078         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3079
3080         kfree(error_buff->buff);
3081         kfree(error_buff);
3082 }
3083
3084 static void handle_error_indication(union ibmvnic_crq *crq,
3085                                     struct ibmvnic_adapter *adapter)
3086 {
3087         struct device *dev = &adapter->vdev->dev;
3088
3089         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3090                 crq->error_indication.flags
3091                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3092                 be32_to_cpu(crq->error_indication.error_id),
3093                 be16_to_cpu(crq->error_indication.error_cause));
3094
3095         if (be32_to_cpu(crq->error_indication.error_id))
3096                 request_error_information(adapter, crq);
3097
3098         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3099                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3100         else
3101                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3102 }
3103
3104 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
3105                                   struct ibmvnic_adapter *adapter)
3106 {
3107         struct net_device *netdev = adapter->netdev;
3108         struct device *dev = &adapter->vdev->dev;
3109         long rc;
3110
3111         rc = crq->change_mac_addr_rsp.rc.code;
3112         if (rc) {
3113                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3114                 return;
3115         }
3116         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3117                ETH_ALEN);
3118 }
3119
3120 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3121                                    struct ibmvnic_adapter *adapter)
3122 {
3123         struct device *dev = &adapter->vdev->dev;
3124         u64 *req_value;
3125         char *name;
3126
3127         atomic_dec(&adapter->running_cap_crqs);
3128         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3129         case REQ_TX_QUEUES:
3130                 req_value = &adapter->req_tx_queues;
3131                 name = "tx";
3132                 break;
3133         case REQ_RX_QUEUES:
3134                 req_value = &adapter->req_rx_queues;
3135                 name = "rx";
3136                 break;
3137         case REQ_RX_ADD_QUEUES:
3138                 req_value = &adapter->req_rx_add_queues;
3139                 name = "rx_add";
3140                 break;
3141         case REQ_TX_ENTRIES_PER_SUBCRQ:
3142                 req_value = &adapter->req_tx_entries_per_subcrq;
3143                 name = "tx_entries_per_subcrq";
3144                 break;
3145         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3146                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3147                 name = "rx_add_entries_per_subcrq";
3148                 break;
3149         case REQ_MTU:
3150                 req_value = &adapter->req_mtu;
3151                 name = "mtu";
3152                 break;
3153         case PROMISC_REQUESTED:
3154                 req_value = &adapter->promisc;
3155                 name = "promisc";
3156                 break;
3157         default:
3158                 dev_err(dev, "Got invalid cap request rsp %d\n",
3159                         crq->request_capability.capability);
3160                 return;
3161         }
3162
3163         switch (crq->request_capability_rsp.rc.code) {
3164         case SUCCESS:
3165                 break;
3166         case PARTIALSUCCESS:
3167                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3168                          *req_value,
3169                          (long int)be64_to_cpu(crq->request_capability_rsp.
3170                                                number), name);
3171                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
3172                 ibmvnic_send_req_caps(adapter, 1);
3173                 return;
3174         default:
3175                 dev_err(dev, "Error %d in request cap rsp\n",
3176                         crq->request_capability_rsp.rc.code);
3177                 return;
3178         }
3179
3180         /* Done receiving requested capabilities, query IP offload support */
3181         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3182                 union ibmvnic_crq newcrq;
3183                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3184                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3185                     &adapter->ip_offload_buf;
3186
3187                 adapter->wait_capability = false;
3188                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3189                                                          buf_sz,
3190                                                          DMA_FROM_DEVICE);
3191
3192                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3193                         if (!firmware_has_feature(FW_FEATURE_CMO))
3194                                 dev_err(dev, "Couldn't map offload buffer\n");
3195                         return;
3196                 }
3197
3198                 memset(&newcrq, 0, sizeof(newcrq));
3199                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3200                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3201                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3202                 newcrq.query_ip_offload.ioba =
3203                     cpu_to_be32(adapter->ip_offload_tok);
3204
3205                 ibmvnic_send_crq(adapter, &newcrq);
3206         }
3207 }
3208
3209 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3210                             struct ibmvnic_adapter *adapter)
3211 {
3212         struct device *dev = &adapter->vdev->dev;
3213         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3214         struct ibmvnic_login_buffer *login = adapter->login_buf;
3215         int i;
3216
3217         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3218                          DMA_BIDIRECTIONAL);
3219         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3220                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3221
3222         /* If the number of queues requested can't be allocated by the
3223          * server, the login response will return with code 1. We will need
3224          * to resend the login buffer with fewer queues requested.
3225          */
3226         if (login_rsp_crq->generic.rc.code) {
3227                 adapter->renegotiate = true;
3228                 complete(&adapter->init_done);
3229                 return 0;
3230         }
3231
3232         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3233         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3234                 netdev_dbg(adapter->netdev, "%016lx\n",
3235                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3236         }
3237
3238         /* Sanity checks */
3239         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3240             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3241              adapter->req_rx_add_queues !=
3242              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3243                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3244                 ibmvnic_remove(adapter->vdev);
3245                 return -EIO;
3246         }
3247         complete(&adapter->init_done);
3248
3249         return 0;
3250 }
3251
3252 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3253                                      struct ibmvnic_adapter *adapter)
3254 {
3255         struct device *dev = &adapter->vdev->dev;
3256         long rc;
3257
3258         rc = crq->request_unmap_rsp.rc.code;
3259         if (rc)
3260                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3261 }
3262
3263 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3264                                  struct ibmvnic_adapter *adapter)
3265 {
3266         struct net_device *netdev = adapter->netdev;
3267         struct device *dev = &adapter->vdev->dev;
3268         long rc;
3269
3270         rc = crq->query_map_rsp.rc.code;
3271         if (rc) {
3272                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3273                 return;
3274         }
3275         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3276                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3277                    crq->query_map_rsp.free_pages);
3278 }
3279
3280 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3281                                  struct ibmvnic_adapter *adapter)
3282 {
3283         struct net_device *netdev = adapter->netdev;
3284         struct device *dev = &adapter->vdev->dev;
3285         long rc;
3286
3287         atomic_dec(&adapter->running_cap_crqs);
3288         netdev_dbg(netdev, "Outstanding queries: %d\n",
3289                    atomic_read(&adapter->running_cap_crqs));
3290         rc = crq->query_capability.rc.code;
3291         if (rc) {
3292                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3293                 goto out;
3294         }
3295
3296         switch (be16_to_cpu(crq->query_capability.capability)) {
3297         case MIN_TX_QUEUES:
3298                 adapter->min_tx_queues =
3299                     be64_to_cpu(crq->query_capability.number);
3300                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3301                            adapter->min_tx_queues);
3302                 break;
3303         case MIN_RX_QUEUES:
3304                 adapter->min_rx_queues =
3305                     be64_to_cpu(crq->query_capability.number);
3306                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3307                            adapter->min_rx_queues);
3308                 break;
3309         case MIN_RX_ADD_QUEUES:
3310                 adapter->min_rx_add_queues =
3311                     be64_to_cpu(crq->query_capability.number);
3312                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3313                            adapter->min_rx_add_queues);
3314                 break;
3315         case MAX_TX_QUEUES:
3316                 adapter->max_tx_queues =
3317                     be64_to_cpu(crq->query_capability.number);
3318                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3319                            adapter->max_tx_queues);
3320                 break;
3321         case MAX_RX_QUEUES:
3322                 adapter->max_rx_queues =
3323                     be64_to_cpu(crq->query_capability.number);
3324                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3325                            adapter->max_rx_queues);
3326                 break;
3327         case MAX_RX_ADD_QUEUES:
3328                 adapter->max_rx_add_queues =
3329                     be64_to_cpu(crq->query_capability.number);
3330                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3331                            adapter->max_rx_add_queues);
3332                 break;
3333         case MIN_TX_ENTRIES_PER_SUBCRQ:
3334                 adapter->min_tx_entries_per_subcrq =
3335                     be64_to_cpu(crq->query_capability.number);
3336                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3337                            adapter->min_tx_entries_per_subcrq);
3338                 break;
3339         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3340                 adapter->min_rx_add_entries_per_subcrq =
3341                     be64_to_cpu(crq->query_capability.number);
3342                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3343                            adapter->min_rx_add_entries_per_subcrq);
3344                 break;
3345         case MAX_TX_ENTRIES_PER_SUBCRQ:
3346                 adapter->max_tx_entries_per_subcrq =
3347                     be64_to_cpu(crq->query_capability.number);
3348                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3349                            adapter->max_tx_entries_per_subcrq);
3350                 break;
3351         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3352                 adapter->max_rx_add_entries_per_subcrq =
3353                     be64_to_cpu(crq->query_capability.number);
3354                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3355                            adapter->max_rx_add_entries_per_subcrq);
3356                 break;
3357         case TCP_IP_OFFLOAD:
3358                 adapter->tcp_ip_offload =
3359                     be64_to_cpu(crq->query_capability.number);
3360                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3361                            adapter->tcp_ip_offload);
3362                 break;
3363         case PROMISC_SUPPORTED:
3364                 adapter->promisc_supported =
3365                     be64_to_cpu(crq->query_capability.number);
3366                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3367                            adapter->promisc_supported);
3368                 break;
3369         case MIN_MTU:
3370                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3371                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3372                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3373                 break;
3374         case MAX_MTU:
3375                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3376                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3377                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3378                 break;
3379         case MAX_MULTICAST_FILTERS:
3380                 adapter->max_multicast_filters =
3381                     be64_to_cpu(crq->query_capability.number);
3382                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3383                            adapter->max_multicast_filters);
3384                 break;
3385         case VLAN_HEADER_INSERTION:
3386                 adapter->vlan_header_insertion =
3387                     be64_to_cpu(crq->query_capability.number);
3388                 if (adapter->vlan_header_insertion)
3389                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3390                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3391                            adapter->vlan_header_insertion);
3392                 break;
3393         case RX_VLAN_HEADER_INSERTION:
3394                 adapter->rx_vlan_header_insertion =
3395                     be64_to_cpu(crq->query_capability.number);
3396                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3397                            adapter->rx_vlan_header_insertion);
3398                 break;
3399         case MAX_TX_SG_ENTRIES:
3400                 adapter->max_tx_sg_entries =
3401                     be64_to_cpu(crq->query_capability.number);
3402                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3403                            adapter->max_tx_sg_entries);
3404                 break;
3405         case RX_SG_SUPPORTED:
3406                 adapter->rx_sg_supported =
3407                     be64_to_cpu(crq->query_capability.number);
3408                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3409                            adapter->rx_sg_supported);
3410                 break;
3411         case OPT_TX_COMP_SUB_QUEUES:
3412                 adapter->opt_tx_comp_sub_queues =
3413                     be64_to_cpu(crq->query_capability.number);
3414                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3415                            adapter->opt_tx_comp_sub_queues);
3416                 break;
3417         case OPT_RX_COMP_QUEUES:
3418                 adapter->opt_rx_comp_queues =
3419                     be64_to_cpu(crq->query_capability.number);
3420                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3421                            adapter->opt_rx_comp_queues);
3422                 break;
3423         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3424                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3425                     be64_to_cpu(crq->query_capability.number);
3426                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3427                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3428                 break;
3429         case OPT_TX_ENTRIES_PER_SUBCRQ:
3430                 adapter->opt_tx_entries_per_subcrq =
3431                     be64_to_cpu(crq->query_capability.number);
3432                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3433                            adapter->opt_tx_entries_per_subcrq);
3434                 break;
3435         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3436                 adapter->opt_rxba_entries_per_subcrq =
3437                     be64_to_cpu(crq->query_capability.number);
3438                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3439                            adapter->opt_rxba_entries_per_subcrq);
3440                 break;
3441         case TX_RX_DESC_REQ:
3442                 adapter->tx_rx_desc_req = crq->query_capability.number;
3443                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3444                            adapter->tx_rx_desc_req);
3445                 break;
3446
3447         default:
3448                 netdev_err(netdev, "Got invalid cap rsp %d\n",
3449                            crq->query_capability.capability);
3450         }
3451
3452 out:
3453         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3454                 adapter->wait_capability = false;
3455                 ibmvnic_send_req_caps(adapter, 0);
3456         }
3457 }
3458
3459 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3460                                struct ibmvnic_adapter *adapter)
3461 {
3462         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3463         struct net_device *netdev = adapter->netdev;
3464         struct device *dev = &adapter->vdev->dev;
3465         u64 *u64_crq = (u64 *)crq;
3466         long rc;
3467
3468         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3469                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3470                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3471         switch (gen_crq->first) {
3472         case IBMVNIC_CRQ_INIT_RSP:
3473                 switch (gen_crq->cmd) {
3474                 case IBMVNIC_CRQ_INIT:
3475                         dev_info(dev, "Partner initialized\n");
3476                         adapter->from_passive_init = true;
3477                         complete(&adapter->init_done);
3478                         break;
3479                 case IBMVNIC_CRQ_INIT_COMPLETE:
3480                         dev_info(dev, "Partner initialization complete\n");
3481                         send_version_xchg(adapter);
3482                         break;
3483                 default:
3484                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3485                 }
3486                 return;
3487         case IBMVNIC_CRQ_XPORT_EVENT:
3488                 netif_carrier_off(netdev);
3489                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3490                         dev_info(dev, "Migrated, re-enabling adapter\n");
3491                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3492                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3493                         dev_info(dev, "Backing device failover detected\n");
3494                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3495                 } else {
3496                         /* The adapter lost the connection */
3497                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3498                                 gen_crq->cmd);
3499                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3500                 }
3501                 return;
3502         case IBMVNIC_CRQ_CMD_RSP:
3503                 break;
3504         default:
3505                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3506                         gen_crq->first);
3507                 return;
3508         }
3509
3510         switch (gen_crq->cmd) {
3511         case VERSION_EXCHANGE_RSP:
3512                 rc = crq->version_exchange_rsp.rc.code;
3513                 if (rc) {
3514                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3515                         break;
3516                 }
3517                 dev_info(dev, "Partner protocol version is %d\n",
3518                          crq->version_exchange_rsp.version);
3519                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3520                     ibmvnic_version)
3521                         ibmvnic_version =
3522                             be16_to_cpu(crq->version_exchange_rsp.version);
3523                 send_cap_queries(adapter);
3524                 break;
3525         case QUERY_CAPABILITY_RSP:
3526                 handle_query_cap_rsp(crq, adapter);
3527                 break;
3528         case QUERY_MAP_RSP:
3529                 handle_query_map_rsp(crq, adapter);
3530                 break;
3531         case REQUEST_MAP_RSP:
3532                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
3533                 complete(&adapter->fw_done);
3534                 break;
3535         case REQUEST_UNMAP_RSP:
3536                 handle_request_unmap_rsp(crq, adapter);
3537                 break;
3538         case REQUEST_CAPABILITY_RSP:
3539                 handle_request_cap_rsp(crq, adapter);
3540                 break;
3541         case LOGIN_RSP:
3542                 netdev_dbg(netdev, "Got Login Response\n");
3543                 handle_login_rsp(crq, adapter);
3544                 break;
3545         case LOGICAL_LINK_STATE_RSP:
3546                 netdev_dbg(netdev,
3547                            "Got Logical Link State Response, state: %d rc: %d\n",
3548                            crq->logical_link_state_rsp.link_state,
3549                            crq->logical_link_state_rsp.rc.code);
3550                 adapter->logical_link_state =
3551                     crq->logical_link_state_rsp.link_state;
3552                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3553                 complete(&adapter->init_done);
3554                 break;
3555         case LINK_STATE_INDICATION:
3556                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3557                 adapter->phys_link_state =
3558                     crq->link_state_indication.phys_link_state;
3559                 adapter->logical_link_state =
3560                     crq->link_state_indication.logical_link_state;
3561                 break;
3562         case CHANGE_MAC_ADDR_RSP:
3563                 netdev_dbg(netdev, "Got MAC address change Response\n");
3564                 handle_change_mac_rsp(crq, adapter);
3565                 break;
3566         case ERROR_INDICATION:
3567                 netdev_dbg(netdev, "Got Error Indication\n");
3568                 handle_error_indication(crq, adapter);
3569                 break;
3570         case REQUEST_ERROR_RSP:
3571                 netdev_dbg(netdev, "Got Error Detail Response\n");
3572                 handle_error_info_rsp(crq, adapter);
3573                 break;
3574         case REQUEST_STATISTICS_RSP:
3575                 netdev_dbg(netdev, "Got Statistics Response\n");
3576                 complete(&adapter->stats_done);
3577                 break;
3578         case QUERY_IP_OFFLOAD_RSP:
3579                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3580                 handle_query_ip_offload_rsp(adapter);
3581                 break;
3582         case MULTICAST_CTRL_RSP:
3583                 netdev_dbg(netdev, "Got multicast control Response\n");
3584                 break;
3585         case CONTROL_IP_OFFLOAD_RSP:
3586                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3587                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3588                                  sizeof(adapter->ip_offload_ctrl),
3589                                  DMA_TO_DEVICE);
3590                 complete(&adapter->init_done);
3591                 break;
3592         case COLLECT_FW_TRACE_RSP:
3593                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3594                 complete(&adapter->fw_done);
3595                 break;
3596         default:
3597                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3598                            gen_crq->cmd);
3599         }
3600 }
3601
3602 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3603 {
3604         struct ibmvnic_adapter *adapter = instance;
3605
3606         tasklet_schedule(&adapter->tasklet);
3607         return IRQ_HANDLED;
3608 }
3609
3610 static void ibmvnic_tasklet(void *data)
3611 {
3612         struct ibmvnic_adapter *adapter = data;
3613         struct ibmvnic_crq_queue *queue = &adapter->crq;
3614         union ibmvnic_crq *crq;
3615         unsigned long flags;
3616         bool done = false;
3617
3618         spin_lock_irqsave(&queue->lock, flags);
3619         while (!done) {
3620                 /* Pull all the valid messages off the CRQ */
3621                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3622                         ibmvnic_handle_crq(crq, adapter);
3623                         crq->generic.first = 0;
3624                 }
3625
3626                 /* remain in tasklet until all
3627                  * capabilities responses are received
3628                  */
3629                 if (!adapter->wait_capability)
3630                         done = true;
3631         }
3632         /* if capabilities CRQ's were sent in this tasklet, the following
3633          * tasklet must wait until all responses are received
3634          */
3635         if (atomic_read(&adapter->running_cap_crqs) != 0)
3636                 adapter->wait_capability = true;
3637         spin_unlock_irqrestore(&queue->lock, flags);
3638 }
3639
3640 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3641 {
3642         struct vio_dev *vdev = adapter->vdev;
3643         int rc;
3644
3645         do {
3646                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3647         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3648
3649         if (rc)
3650                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3651
3652         return rc;
3653 }
3654
3655 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3656 {
3657         struct ibmvnic_crq_queue *crq = &adapter->crq;
3658         struct device *dev = &adapter->vdev->dev;
3659         struct vio_dev *vdev = adapter->vdev;
3660         int rc;
3661
3662         /* Close the CRQ */
3663         do {
3664                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3665         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3666
3667         /* Clean out the queue */
3668         memset(crq->msgs, 0, PAGE_SIZE);
3669         crq->cur = 0;
3670
3671         /* And re-open it again */
3672         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3673                                 crq->msg_token, PAGE_SIZE);
3674
3675         if (rc == H_CLOSED)
3676                 /* Adapter is good, but other end is not ready */
3677                 dev_warn(dev, "Partner adapter not ready\n");
3678         else if (rc != 0)
3679                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3680
3681         return rc;
3682 }
3683
3684 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3685 {
3686         struct ibmvnic_crq_queue *crq = &adapter->crq;
3687         struct vio_dev *vdev = adapter->vdev;
3688         long rc;
3689
3690         if (!crq->msgs)
3691                 return;
3692
3693         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3694         free_irq(vdev->irq, adapter);
3695         tasklet_kill(&adapter->tasklet);
3696         do {
3697                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3698         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3699
3700         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3701                          DMA_BIDIRECTIONAL);
3702         free_page((unsigned long)crq->msgs);
3703         crq->msgs = NULL;
3704 }
3705
3706 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3707 {
3708         struct ibmvnic_crq_queue *crq = &adapter->crq;
3709         struct device *dev = &adapter->vdev->dev;
3710         struct vio_dev *vdev = adapter->vdev;
3711         int rc, retrc = -ENOMEM;
3712
3713         if (crq->msgs)
3714                 return 0;
3715
3716         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3717         /* Should we allocate more than one page? */
3718
3719         if (!crq->msgs)
3720                 return -ENOMEM;
3721
3722         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3723         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3724                                         DMA_BIDIRECTIONAL);
3725         if (dma_mapping_error(dev, crq->msg_token))
3726                 goto map_failed;
3727
3728         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3729                                 crq->msg_token, PAGE_SIZE);
3730
3731         if (rc == H_RESOURCE)
3732                 /* maybe kexecing and resource is busy. try a reset */
3733                 rc = ibmvnic_reset_crq(adapter);
3734         retrc = rc;
3735
3736         if (rc == H_CLOSED) {
3737                 dev_warn(dev, "Partner adapter not ready\n");
3738         } else if (rc) {
3739                 dev_warn(dev, "Error %d opening adapter\n", rc);
3740                 goto reg_crq_failed;
3741         }
3742
3743         retrc = 0;
3744
3745         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3746                      (unsigned long)adapter);
3747
3748         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3749         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3750                          adapter);
3751         if (rc) {
3752                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3753                         vdev->irq, rc);
3754                 goto req_irq_failed;
3755         }
3756
3757         rc = vio_enable_interrupts(vdev);
3758         if (rc) {
3759                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3760                 goto req_irq_failed;
3761         }
3762
3763         crq->cur = 0;
3764         spin_lock_init(&crq->lock);
3765
3766         return retrc;
3767
3768 req_irq_failed:
3769         tasklet_kill(&adapter->tasklet);
3770         do {
3771                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3772         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3773 reg_crq_failed:
3774         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3775 map_failed:
3776         free_page((unsigned long)crq->msgs);
3777         crq->msgs = NULL;
3778         return retrc;
3779 }
3780
3781 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3782 {
3783         struct device *dev = &adapter->vdev->dev;
3784         unsigned long timeout = msecs_to_jiffies(30000);
3785         int rc;
3786
3787         if (adapter->resetting) {
3788                 rc = ibmvnic_reset_crq(adapter);
3789                 if (!rc)
3790                         rc = vio_enable_interrupts(adapter->vdev);
3791         } else {
3792                 rc = init_crq_queue(adapter);
3793         }
3794
3795         if (rc) {
3796                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3797                 return rc;
3798         }
3799
3800         adapter->from_passive_init = false;
3801
3802         init_completion(&adapter->init_done);
3803         adapter->init_done_rc = 0;
3804         ibmvnic_send_crq_init(adapter);
3805         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3806                 dev_err(dev, "Initialization sequence timed out\n");
3807                 return -1;
3808         }
3809
3810         if (adapter->init_done_rc) {
3811                 release_crq_queue(adapter);
3812                 return adapter->init_done_rc;
3813         }
3814
3815         if (adapter->from_passive_init) {
3816                 adapter->state = VNIC_OPEN;
3817                 adapter->from_passive_init = false;
3818                 return -1;
3819         }
3820
3821         if (adapter->resetting)
3822                 rc = reset_sub_crq_queues(adapter);
3823         else
3824                 rc = init_sub_crqs(adapter);
3825         if (rc) {
3826                 dev_err(dev, "Initialization of sub crqs failed\n");
3827                 release_crq_queue(adapter);
3828                 return rc;
3829         }
3830
3831         rc = init_sub_crq_irqs(adapter);
3832         if (rc) {
3833                 dev_err(dev, "Failed to initialize sub crq irqs\n");
3834                 release_crq_queue(adapter);
3835         }
3836
3837         return rc;
3838 }
3839
3840 static struct device_attribute dev_attr_failover;
3841
3842 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3843 {
3844         struct ibmvnic_adapter *adapter;
3845         struct net_device *netdev;
3846         unsigned char *mac_addr_p;
3847         int rc;
3848
3849         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3850                 dev->unit_address);
3851
3852         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3853                                                         VETH_MAC_ADDR, NULL);
3854         if (!mac_addr_p) {
3855                 dev_err(&dev->dev,
3856                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3857                         __FILE__, __LINE__);
3858                 return 0;
3859         }
3860
3861         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3862                                    IBMVNIC_MAX_TX_QUEUES);
3863         if (!netdev)
3864                 return -ENOMEM;
3865
3866         adapter = netdev_priv(netdev);
3867         adapter->state = VNIC_PROBING;
3868         dev_set_drvdata(&dev->dev, netdev);
3869         adapter->vdev = dev;
3870         adapter->netdev = netdev;
3871
3872         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3873         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3874         netdev->irq = dev->irq;
3875         netdev->netdev_ops = &ibmvnic_netdev_ops;
3876         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3877         SET_NETDEV_DEV(netdev, &dev->dev);
3878
3879         spin_lock_init(&adapter->stats_lock);
3880
3881         INIT_LIST_HEAD(&adapter->errors);
3882         spin_lock_init(&adapter->error_list_lock);
3883
3884         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3885         INIT_LIST_HEAD(&adapter->rwi_list);
3886         mutex_init(&adapter->reset_lock);
3887         mutex_init(&adapter->rwi_lock);
3888         adapter->resetting = false;
3889
3890         do {
3891                 rc = ibmvnic_init(adapter);
3892                 if (rc && rc != EAGAIN)
3893                         goto ibmvnic_init_fail;
3894         } while (rc == EAGAIN);
3895
3896         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3897
3898         rc = device_create_file(&dev->dev, &dev_attr_failover);
3899         if (rc)
3900                 goto ibmvnic_init_fail;
3901
3902         rc = register_netdev(netdev);
3903         if (rc) {
3904                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3905                 goto ibmvnic_register_fail;
3906         }
3907         dev_info(&dev->dev, "ibmvnic registered\n");
3908
3909         adapter->state = VNIC_PROBED;
3910         return 0;
3911
3912 ibmvnic_register_fail:
3913         device_remove_file(&dev->dev, &dev_attr_failover);
3914
3915 ibmvnic_init_fail:
3916         release_sub_crqs(adapter);
3917         release_crq_queue(adapter);
3918         free_netdev(netdev);
3919
3920         return rc;
3921 }
3922
3923 static int ibmvnic_remove(struct vio_dev *dev)
3924 {
3925         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3926         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3927
3928         adapter->state = VNIC_REMOVING;
3929         unregister_netdev(netdev);
3930         mutex_lock(&adapter->reset_lock);
3931
3932         release_resources(adapter);
3933         release_sub_crqs(adapter);
3934         release_crq_queue(adapter);
3935
3936         adapter->state = VNIC_REMOVED;
3937
3938         mutex_unlock(&adapter->reset_lock);
3939         device_remove_file(&dev->dev, &dev_attr_failover);
3940         free_netdev(netdev);
3941         dev_set_drvdata(&dev->dev, NULL);
3942
3943         return 0;
3944 }
3945
3946 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
3947                               const char *buf, size_t count)
3948 {
3949         struct net_device *netdev = dev_get_drvdata(dev);
3950         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3951         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
3952         __be64 session_token;
3953         long rc;
3954
3955         if (!sysfs_streq(buf, "1"))
3956                 return -EINVAL;
3957
3958         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
3959                          H_GET_SESSION_TOKEN, 0, 0, 0);
3960         if (rc) {
3961                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
3962                            rc);
3963                 return -EINVAL;
3964         }
3965
3966         session_token = (__be64)retbuf[0];
3967         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
3968                    be64_to_cpu(session_token));
3969         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
3970                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
3971         if (rc) {
3972                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
3973                            rc);
3974                 return -EINVAL;
3975         }
3976
3977         return count;
3978 }
3979
3980 static DEVICE_ATTR(failover, 0200, NULL, failover_store);
3981
3982 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3983 {
3984         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3985         struct ibmvnic_adapter *adapter;
3986         struct iommu_table *tbl;
3987         unsigned long ret = 0;
3988         int i;
3989
3990         tbl = get_iommu_table_base(&vdev->dev);
3991
3992         /* netdev inits at probe time along with the structures we need below*/
3993         if (!netdev)
3994                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3995
3996         adapter = netdev_priv(netdev);
3997
3998         ret += PAGE_SIZE; /* the crq message queue */
3999         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4000
4001         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4002                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4003
4004         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4005              i++)
4006                 ret += adapter->rx_pool[i].size *
4007                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4008
4009         return ret;
4010 }
4011
4012 static int ibmvnic_resume(struct device *dev)
4013 {
4014         struct net_device *netdev = dev_get_drvdata(dev);
4015         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4016
4017         if (adapter->state != VNIC_OPEN)
4018                 return 0;
4019
4020         tasklet_schedule(&adapter->tasklet);
4021
4022         return 0;
4023 }
4024
4025 static const struct vio_device_id ibmvnic_device_table[] = {
4026         {"network", "IBM,vnic"},
4027         {"", "" }
4028 };
4029 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4030
4031 static const struct dev_pm_ops ibmvnic_pm_ops = {
4032         .resume = ibmvnic_resume
4033 };
4034
4035 static struct vio_driver ibmvnic_driver = {
4036         .id_table       = ibmvnic_device_table,
4037         .probe          = ibmvnic_probe,
4038         .remove         = ibmvnic_remove,
4039         .get_desired_dma = ibmvnic_get_desired_dma,
4040         .name           = ibmvnic_driver_name,
4041         .pm             = &ibmvnic_pm_ops,
4042 };
4043
4044 /* module functions */
4045 static int __init ibmvnic_module_init(void)
4046 {
4047         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4048                 IBMVNIC_DRIVER_VERSION);
4049
4050         return vio_register_driver(&ibmvnic_driver);
4051 }
4052
4053 static void __exit ibmvnic_module_exit(void)
4054 {
4055         vio_unregister_driver(&ibmvnic_driver);
4056 }
4057
4058 module_init(ibmvnic_module_init);
4059 module_exit(ibmvnic_module_exit);