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/if_arp.h>
  63 #include <linux/in.h>
  64 #include <linux/ip.h>
  65 #include <linux/ipv6.h>
  66 #include <linux/irq.h>
  67 #include <linux/kthread.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78 #include <linux/if_vlan.h>
  79 #include <linux/utsname.h>
  80
  81 #include "ibmvnic.h"
  82
  83 static const char ibmvnic_driver_name[] = "ibmvnic";
  84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  85
  86 MODULE_AUTHOR("Santiago Leon");
  87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  88 MODULE_LICENSE("GPL");
  89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  90
  91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  92 static int ibmvnic_remove(struct vio_dev *);
  93 static void release_sub_crqs(struct ibmvnic_adapter *);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 114 static void send_login(struct ibmvnic_adapter *adapter);
 115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 116 static int init_sub_crqs(struct ibmvnic_adapter *);
 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 118 static int ibmvnic_init(struct ibmvnic_adapter *);
 119 static void release_crq_queue(struct ibmvnic_adapter *);
 120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
 121
 122 struct ibmvnic_stat {
 123         char name[ETH_GSTRING_LEN];
 124         int offset;
 125 };
 126
 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 128                              offsetof(struct ibmvnic_statistics, stat))
 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 130
 131 static const struct ibmvnic_stat ibmvnic_stats[] = {
 132         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 133         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 134         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 135         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 136         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 137         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 138         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 139         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 140         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 141         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 142         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 143         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 144         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 145         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 146         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 147         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 148         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 149         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 150         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 151         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 152         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 153         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 154 };
 155
 156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 157                           unsigned long length, unsigned long *number,
 158                           unsigned long *irq)
 159 {
 160         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 161         long rc;
 162
 163         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 164         *number = retbuf[0];
 165         *irq = retbuf[1];
 166
 167         return rc;
 168 }
 169
 170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 171                                 struct ibmvnic_long_term_buff *ltb, int size)
 172 {
 173         struct device *dev = &adapter->vdev->dev;
 174
 175         ltb->size = size;
 176         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 177                                        GFP_KERNEL);
 178
 179         if (!ltb->buff) {
 180                 dev_err(dev, "Couldn't alloc long term buffer\n");
 181                 return -ENOMEM;
 182         }
 183         ltb->map_id = adapter->map_id;
 184         adapter->map_id++;
 185
 186         init_completion(&adapter->fw_done);
 187         send_request_map(adapter, ltb->addr,
 188                          ltb->size, ltb->map_id);
 189         wait_for_completion(&adapter->fw_done);
 190
 191         if (adapter->fw_done_rc) {
 192                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 193                         adapter->fw_done_rc);
 194                 return -1;
 195         }
 196         return 0;
 197 }
 198
 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 200                                 struct ibmvnic_long_term_buff *ltb)
 201 {
 202         struct device *dev = &adapter->vdev->dev;
 203
 204         if (!ltb->buff)
 205                 return;
 206
 207         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 208             adapter->reset_reason != VNIC_RESET_MOBILITY)
 209                 send_request_unmap(adapter, ltb->map_id);
 210         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 211 }
 212
 213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 214                                 struct ibmvnic_long_term_buff *ltb)
 215 {
 216         memset(ltb->buff, 0, ltb->size);
 217
 218         init_completion(&adapter->fw_done);
 219         send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 220         wait_for_completion(&adapter->fw_done);
 221
 222         if (adapter->fw_done_rc) {
 223                 dev_info(&adapter->vdev->dev,
 224                          "Reset failed, attempting to free and reallocate buffer\n");
 225                 free_long_term_buff(adapter, ltb);
 226                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 227         }
 228         return 0;
 229 }
 230
 231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 232 {
 233         int i;
 234
 235         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 236              i++)
 237                 adapter->rx_pool[i].active = 0;
 238 }
 239
 240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 241                               struct ibmvnic_rx_pool *pool)
 242 {
 243         int count = pool->size - atomic_read(&pool->available);
 244         struct device *dev = &adapter->vdev->dev;
 245         int buffers_added = 0;
 246         unsigned long lpar_rc;
 247         union sub_crq sub_crq;
 248         struct sk_buff *skb;
 249         unsigned int offset;
 250         dma_addr_t dma_addr;
 251         unsigned char *dst;
 252         u64 *handle_array;
 253         int shift = 0;
 254         int index;
 255         int i;
 256
 257         if (!pool->active)
 258                 return;
 259
 260         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 261                                       be32_to_cpu(adapter->login_rsp_buf->
 262                                       off_rxadd_subcrqs));
 263
 264         for (i = 0; i < count; ++i) {
 265                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 266                 if (!skb) {
 267                         dev_err(dev, "Couldn't replenish rx buff\n");
 268                         adapter->replenish_no_mem++;
 269                         break;
 270                 }
 271
 272                 index = pool->free_map[pool->next_free];
 273
 274                 if (pool->rx_buff[index].skb)
 275                         dev_err(dev, "Inconsistent free_map!\n");
 276
 277                 /* Copy the skb to the long term mapped DMA buffer */
 278                 offset = index * pool->buff_size;
 279                 dst = pool->long_term_buff.buff + offset;
 280                 memset(dst, 0, pool->buff_size);
 281                 dma_addr = pool->long_term_buff.addr + offset;
 282                 pool->rx_buff[index].data = dst;
 283
 284                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 285                 pool->rx_buff[index].dma = dma_addr;
 286                 pool->rx_buff[index].skb = skb;
 287                 pool->rx_buff[index].pool_index = pool->index;
 288                 pool->rx_buff[index].size = pool->buff_size;
 289
 290                 memset(&sub_crq, 0, sizeof(sub_crq));
 291                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 292                 sub_crq.rx_add.correlator =
 293                     cpu_to_be64((u64)&pool->rx_buff[index]);
 294                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 295                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 296
 297                 /* The length field of the sCRQ is defined to be 24 bits so the
 298                  * buffer size needs to be left shifted by a byte before it is
 299                  * converted to big endian to prevent the last byte from being
 300                  * truncated.
 301                  */
 302 #ifdef __LITTLE_ENDIAN__
 303                 shift = 8;
 304 #endif
 305                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 306
 307                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 308                                       &sub_crq);
 309                 if (lpar_rc != H_SUCCESS)
 310                         goto failure;
 311
 312                 buffers_added++;
 313                 adapter->replenish_add_buff_success++;
 314                 pool->next_free = (pool->next_free + 1) % pool->size;
 315         }
 316         atomic_add(buffers_added, &pool->available);
 317         return;
 318
 319 failure:
 320         dev_info(dev, "replenish pools failure\n");
 321         pool->free_map[pool->next_free] = index;
 322         pool->rx_buff[index].skb = NULL;
 323         if (!dma_mapping_error(dev, dma_addr))
 324                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 325                                  DMA_FROM_DEVICE);
 326
 327         dev_kfree_skb_any(skb);
 328         adapter->replenish_add_buff_failure++;
 329         atomic_add(buffers_added, &pool->available);
 330
 331         if (lpar_rc == H_CLOSED) {
 332                 /* Disable buffer pool replenishment and report carrier off if
 333                  * queue is closed. Firmware guarantees that a signal will
 334                  * be sent to the driver, triggering a reset.
 335                  */
 336                 deactivate_rx_pools(adapter);
 337                 netif_carrier_off(adapter->netdev);
 338         }
 339 }
 340
 341 static void replenish_pools(struct ibmvnic_adapter *adapter)
 342 {
 343         int i;
 344
 345         adapter->replenish_task_cycles++;
 346         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 347              i++) {
 348                 if (adapter->rx_pool[i].active)
 349                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 350         }
 351 }
 352
 353 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 354 {
 355         kfree(adapter->tx_stats_buffers);
 356         kfree(adapter->rx_stats_buffers);
 357         adapter->tx_stats_buffers = NULL;
 358         adapter->rx_stats_buffers = NULL;
 359 }
 360
 361 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 362 {
 363         adapter->tx_stats_buffers =
 364                                 kcalloc(adapter->req_tx_queues,
 365                                         sizeof(struct ibmvnic_tx_queue_stats),
 366                                         GFP_KERNEL);
 367         if (!adapter->tx_stats_buffers)
 368                 return -ENOMEM;
 369
 370         adapter->rx_stats_buffers =
 371                                 kcalloc(adapter->req_rx_queues,
 372                                         sizeof(struct ibmvnic_rx_queue_stats),
 373                                         GFP_KERNEL);
 374         if (!adapter->rx_stats_buffers)
 375                 return -ENOMEM;
 376
 377         return 0;
 378 }
 379
 380 static void release_stats_token(struct ibmvnic_adapter *adapter)
 381 {
 382         struct device *dev = &adapter->vdev->dev;
 383
 384         if (!adapter->stats_token)
 385                 return;
 386
 387         dma_unmap_single(dev, adapter->stats_token,
 388                          sizeof(struct ibmvnic_statistics),
 389                          DMA_FROM_DEVICE);
 390         adapter->stats_token = 0;
 391 }
 392
 393 static int init_stats_token(struct ibmvnic_adapter *adapter)
 394 {
 395         struct device *dev = &adapter->vdev->dev;
 396         dma_addr_t stok;
 397
 398         stok = dma_map_single(dev, &adapter->stats,
 399                               sizeof(struct ibmvnic_statistics),
 400                               DMA_FROM_DEVICE);
 401         if (dma_mapping_error(dev, stok)) {
 402                 dev_err(dev, "Couldn't map stats buffer\n");
 403                 return -1;
 404         }
 405
 406         adapter->stats_token = stok;
 407         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 408         return 0;
 409 }
 410
 411 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 412 {
 413         struct ibmvnic_rx_pool *rx_pool;
 414         int rx_scrqs;
 415         int i, j, rc;
 416         u64 *size_array;
 417
 418         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 419                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 420
 421         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 422         for (i = 0; i < rx_scrqs; i++) {
 423                 rx_pool = &adapter->rx_pool[i];
 424
 425                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 426
 427                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 428                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 429                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 430                         alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 431                                              rx_pool->size *
 432                                              rx_pool->buff_size);
 433                 } else {
 434                         rc = reset_long_term_buff(adapter,
 435                                                   &rx_pool->long_term_buff);
 436                 }
 437
 438                 if (rc)
 439                         return rc;
 440
 441                 for (j = 0; j < rx_pool->size; j++)
 442                         rx_pool->free_map[j] = j;
 443
 444                 memset(rx_pool->rx_buff, 0,
 445                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 446
 447                 atomic_set(&rx_pool->available, 0);
 448                 rx_pool->next_alloc = 0;
 449                 rx_pool->next_free = 0;
 450                 rx_pool->active = 1;
 451         }
 452
 453         return 0;
 454 }
 455
 456 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 457 {
 458         struct ibmvnic_rx_pool *rx_pool;
 459         int i, j;
 460
 461         if (!adapter->rx_pool)
 462                 return;
 463
 464         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 465                 rx_pool = &adapter->rx_pool[i];
 466
 467                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 468
 469                 kfree(rx_pool->free_map);
 470                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 471
 472                 if (!rx_pool->rx_buff)
 473                         continue;
 474
 475                 for (j = 0; j < rx_pool->size; j++) {
 476                         if (rx_pool->rx_buff[j].skb) {
 477                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 478                                 rx_pool->rx_buff[i].skb = NULL;
 479                         }
 480                 }
 481
 482                 kfree(rx_pool->rx_buff);
 483         }
 484
 485         kfree(adapter->rx_pool);
 486         adapter->rx_pool = NULL;
 487         adapter->num_active_rx_pools = 0;
 488 }
 489
 490 static int init_rx_pools(struct net_device *netdev)
 491 {
 492         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 493         struct device *dev = &adapter->vdev->dev;
 494         struct ibmvnic_rx_pool *rx_pool;
 495         int rxadd_subcrqs;
 496         u64 *size_array;
 497         int i, j;
 498
 499         rxadd_subcrqs =
 500                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 501         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 502                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 503
 504         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 505                                    sizeof(struct ibmvnic_rx_pool),
 506                                    GFP_KERNEL);
 507         if (!adapter->rx_pool) {
 508                 dev_err(dev, "Failed to allocate rx pools\n");
 509                 return -1;
 510         }
 511
 512         adapter->num_active_rx_pools = 0;
 513
 514         for (i = 0; i < rxadd_subcrqs; i++) {
 515                 rx_pool = &adapter->rx_pool[i];
 516
 517                 netdev_dbg(adapter->netdev,
 518                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 519                            i, adapter->req_rx_add_entries_per_subcrq,
 520                            be64_to_cpu(size_array[i]));
 521
 522                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 523                 rx_pool->index = i;
 524                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 525                 rx_pool->active = 1;
 526
 527                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 528                                             GFP_KERNEL);
 529                 if (!rx_pool->free_map) {
 530                         release_rx_pools(adapter);
 531                         return -1;
 532                 }
 533
 534                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 535                                            sizeof(struct ibmvnic_rx_buff),
 536                                            GFP_KERNEL);
 537                 if (!rx_pool->rx_buff) {
 538                         dev_err(dev, "Couldn't alloc rx buffers\n");
 539                         release_rx_pools(adapter);
 540                         return -1;
 541                 }
 542
 543                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 544                                          rx_pool->size * rx_pool->buff_size)) {
 545                         release_rx_pools(adapter);
 546                         return -1;
 547                 }
 548
 549                 for (j = 0; j < rx_pool->size; ++j)
 550                         rx_pool->free_map[j] = j;
 551
 552                 atomic_set(&rx_pool->available, 0);
 553                 rx_pool->next_alloc = 0;
 554                 rx_pool->next_free = 0;
 555         }
 556
 557         adapter->num_active_rx_pools = rxadd_subcrqs;
 558
 559         return 0;
 560 }
 561
 562 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 563 {
 564         struct ibmvnic_tx_pool *tx_pool;
 565         int tx_scrqs;
 566         int i, j, rc;
 567
 568         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 569         for (i = 0; i < tx_scrqs; i++) {
 570                 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
 571
 572                 tx_pool = &adapter->tx_pool[i];
 573
 574                 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 575                 if (rc)
 576                         return rc;
 577
 578                 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
 579                 if (rc)
 580                         return rc;
 581
 582                 memset(tx_pool->tx_buff, 0,
 583                        adapter->req_tx_entries_per_subcrq *
 584                        sizeof(struct ibmvnic_tx_buff));
 585
 586                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 587                         tx_pool->free_map[j] = j;
 588
 589                 tx_pool->consumer_index = 0;
 590                 tx_pool->producer_index = 0;
 591                 tx_pool->tso_index = 0;
 592         }
 593
 594         return 0;
 595 }
 596
 597 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 598 {
 599         if (!adapter->vpd)
 600                 return;
 601
 602         kfree(adapter->vpd->buff);
 603         kfree(adapter->vpd);
 604
 605         adapter->vpd = NULL;
 606 }
 607
 608 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 609 {
 610         struct ibmvnic_tx_pool *tx_pool;
 611         int i;
 612
 613         if (!adapter->tx_pool)
 614                 return;
 615
 616         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 617                 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
 618                 tx_pool = &adapter->tx_pool[i];
 619                 kfree(tx_pool->tx_buff);
 620                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 621                 free_long_term_buff(adapter, &tx_pool->tso_ltb);
 622                 kfree(tx_pool->free_map);
 623         }
 624
 625         kfree(adapter->tx_pool);
 626         adapter->tx_pool = NULL;
 627         adapter->num_active_tx_pools = 0;
 628 }
 629
 630 static int init_tx_pools(struct net_device *netdev)
 631 {
 632         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 633         struct device *dev = &adapter->vdev->dev;
 634         struct ibmvnic_tx_pool *tx_pool;
 635         int tx_subcrqs;
 636         int i, j;
 637
 638         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 639         adapter->tx_pool = kcalloc(tx_subcrqs,
 640                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 641         if (!adapter->tx_pool)
 642                 return -1;
 643
 644         adapter->num_active_tx_pools = 0;
 645
 646         for (i = 0; i < tx_subcrqs; i++) {
 647                 tx_pool = &adapter->tx_pool[i];
 648
 649                 netdev_dbg(adapter->netdev,
 650                            "Initializing tx_pool[%d], %lld buffs\n",
 651                            i, adapter->req_tx_entries_per_subcrq);
 652
 653                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 654                                            sizeof(struct ibmvnic_tx_buff),
 655                                            GFP_KERNEL);
 656                 if (!tx_pool->tx_buff) {
 657                         dev_err(dev, "tx pool buffer allocation failed\n");
 658                         release_tx_pools(adapter);
 659                         return -1;
 660                 }
 661
 662                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 663                                          adapter->req_tx_entries_per_subcrq *
 664                                          adapter->req_mtu)) {
 665                         release_tx_pools(adapter);
 666                         return -1;
 667                 }
 668
 669                 /* alloc TSO ltb */
 670                 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
 671                                          IBMVNIC_TSO_BUFS *
 672                                          IBMVNIC_TSO_BUF_SZ)) {
 673                         release_tx_pools(adapter);
 674                         return -1;
 675                 }
 676
 677                 tx_pool->tso_index = 0;
 678
 679                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 680                                             sizeof(int), GFP_KERNEL);
 681                 if (!tx_pool->free_map) {
 682                         release_tx_pools(adapter);
 683                         return -1;
 684                 }
 685
 686                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 687                         tx_pool->free_map[j] = j;
 688
 689                 tx_pool->consumer_index = 0;
 690                 tx_pool->producer_index = 0;
 691         }
 692
 693         adapter->num_active_tx_pools = tx_subcrqs;
 694
 695         return 0;
 696 }
 697
 698 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 699 {
 700         struct device *dev = &adapter->vdev->dev;
 701         struct ibmvnic_error_buff *error_buff, *tmp;
 702         unsigned long flags;
 703
 704         spin_lock_irqsave(&adapter->error_list_lock, flags);
 705         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 706                 list_del(&error_buff->list);
 707                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 708                                  DMA_FROM_DEVICE);
 709                 kfree(error_buff->buff);
 710                 kfree(error_buff);
 711         }
 712         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 713 }
 714
 715 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 716 {
 717         int i;
 718
 719         if (adapter->napi_enabled)
 720                 return;
 721
 722         for (i = 0; i < adapter->req_rx_queues; i++)
 723                 napi_enable(&adapter->napi[i]);
 724
 725         adapter->napi_enabled = true;
 726 }
 727
 728 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 729 {
 730         int i;
 731
 732         if (!adapter->napi_enabled)
 733                 return;
 734
 735         for (i = 0; i < adapter->req_rx_queues; i++) {
 736                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 737                 napi_disable(&adapter->napi[i]);
 738         }
 739
 740         adapter->napi_enabled = false;
 741 }
 742
 743 static int ibmvnic_login(struct net_device *netdev)
 744 {
 745         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 746         unsigned long timeout = msecs_to_jiffies(30000);
 747         struct device *dev = &adapter->vdev->dev;
 748         int rc;
 749
 750         do {
 751                 if (adapter->renegotiate) {
 752                         adapter->renegotiate = false;
 753                         release_sub_crqs(adapter);
 754
 755                         reinit_completion(&adapter->init_done);
 756                         send_cap_queries(adapter);
 757                         if (!wait_for_completion_timeout(&adapter->init_done,
 758                                                          timeout)) {
 759                                 dev_err(dev, "Capabilities query timeout\n");
 760                                 return -1;
 761                         }
 762                         rc = init_sub_crqs(adapter);
 763                         if (rc) {
 764                                 dev_err(dev,
 765                                         "Initialization of SCRQ's failed\n");
 766                                 return -1;
 767                         }
 768                         rc = init_sub_crq_irqs(adapter);
 769                         if (rc) {
 770                                 dev_err(dev,
 771                                         "Initialization of SCRQ's irqs failed\n");
 772                                 return -1;
 773                         }
 774                 }
 775
 776                 reinit_completion(&adapter->init_done);
 777                 send_login(adapter);
 778                 if (!wait_for_completion_timeout(&adapter->init_done,
 779                                                  timeout)) {
 780                         dev_err(dev, "Login timeout\n");
 781                         return -1;
 782                 }
 783         } while (adapter->renegotiate);
 784
 785         /* handle pending MAC address changes after successful login */
 786         if (adapter->mac_change_pending) {
 787                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 788                 adapter->mac_change_pending = false;
 789         }
 790
 791         return 0;
 792 }
 793
 794 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 795 {
 796         kfree(adapter->login_buf);
 797         adapter->login_buf = NULL;
 798 }
 799
 800 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 801 {
 802         kfree(adapter->login_rsp_buf);
 803         adapter->login_rsp_buf = NULL;
 804 }
 805
 806 static void release_resources(struct ibmvnic_adapter *adapter)
 807 {
 808         int i;
 809
 810         release_vpd_data(adapter);
 811
 812         release_tx_pools(adapter);
 813         release_rx_pools(adapter);
 814
 815         release_stats_token(adapter);
 816         release_stats_buffers(adapter);
 817         release_error_buffers(adapter);
 818
 819         if (adapter->napi) {
 820                 for (i = 0; i < adapter->req_rx_queues; i++) {
 821                         if (&adapter->napi[i]) {
 822                                 netdev_dbg(adapter->netdev,
 823                                            "Releasing napi[%d]\n", i);
 824                                 netif_napi_del(&adapter->napi[i]);
 825                         }
 826                 }
 827         }
 828         kfree(adapter->napi);
 829         adapter->napi = NULL;
 830
 831         release_login_rsp_buffer(adapter);
 832 }
 833
 834 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 835 {
 836         struct net_device *netdev = adapter->netdev;
 837         unsigned long timeout = msecs_to_jiffies(30000);
 838         union ibmvnic_crq crq;
 839         bool resend;
 840         int rc;
 841
 842         netdev_dbg(netdev, "setting link state %d\n", link_state);
 843
 844         memset(&crq, 0, sizeof(crq));
 845         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 846         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 847         crq.logical_link_state.link_state = link_state;
 848
 849         do {
 850                 resend = false;
 851
 852                 reinit_completion(&adapter->init_done);
 853                 rc = ibmvnic_send_crq(adapter, &crq);
 854                 if (rc) {
 855                         netdev_err(netdev, "Failed to set link state\n");
 856                         return rc;
 857                 }
 858
 859                 if (!wait_for_completion_timeout(&adapter->init_done,
 860                                                  timeout)) {
 861                         netdev_err(netdev, "timeout setting link state\n");
 862                         return -1;
 863                 }
 864
 865                 if (adapter->init_done_rc == 1) {
 866                         /* Partuial success, delay and re-send */
 867                         mdelay(1000);
 868                         resend = true;
 869                 }
 870         } while (resend);
 871
 872         return 0;
 873 }
 874
 875 static int set_real_num_queues(struct net_device *netdev)
 876 {
 877         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 878         int rc;
 879
 880         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 881                    adapter->req_tx_queues, adapter->req_rx_queues);
 882
 883         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 884         if (rc) {
 885                 netdev_err(netdev, "failed to set the number of tx queues\n");
 886                 return rc;
 887         }
 888
 889         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 890         if (rc)
 891                 netdev_err(netdev, "failed to set the number of rx queues\n");
 892
 893         return rc;
 894 }
 895
 896 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 897 {
 898         struct device *dev = &adapter->vdev->dev;
 899         union ibmvnic_crq crq;
 900         int len = 0;
 901
 902         if (adapter->vpd->buff)
 903                 len = adapter->vpd->len;
 904
 905         init_completion(&adapter->fw_done);
 906         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 907         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 908         ibmvnic_send_crq(adapter, &crq);
 909         wait_for_completion(&adapter->fw_done);
 910
 911         if (!adapter->vpd->len)
 912                 return -ENODATA;
 913
 914         if (!adapter->vpd->buff)
 915                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 916         else if (adapter->vpd->len != len)
 917                 adapter->vpd->buff =
 918                         krealloc(adapter->vpd->buff,
 919                                  adapter->vpd->len, GFP_KERNEL);
 920
 921         if (!adapter->vpd->buff) {
 922                 dev_err(dev, "Could allocate VPD buffer\n");
 923                 return -ENOMEM;
 924         }
 925
 926         adapter->vpd->dma_addr =
 927                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 928                                DMA_FROM_DEVICE);
 929         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 930                 dev_err(dev, "Could not map VPD buffer\n");
 931                 kfree(adapter->vpd->buff);
 932                 adapter->vpd->buff = NULL;
 933                 return -ENOMEM;
 934         }
 935
 936         reinit_completion(&adapter->fw_done);
 937         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 938         crq.get_vpd.cmd = GET_VPD;
 939         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 940         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
 941         ibmvnic_send_crq(adapter, &crq);
 942         wait_for_completion(&adapter->fw_done);
 943
 944         return 0;
 945 }
 946
 947 static int init_resources(struct ibmvnic_adapter *adapter)
 948 {
 949         struct net_device *netdev = adapter->netdev;
 950         int i, rc;
 951
 952         rc = set_real_num_queues(netdev);
 953         if (rc)
 954                 return rc;
 955
 956         rc = init_stats_buffers(adapter);
 957         if (rc)
 958                 return rc;
 959
 960         rc = init_stats_token(adapter);
 961         if (rc)
 962                 return rc;
 963
 964         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
 965         if (!adapter->vpd)
 966                 return -ENOMEM;
 967
 968         /* Vital Product Data (VPD) */
 969         rc = ibmvnic_get_vpd(adapter);
 970         if (rc) {
 971                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
 972                 return rc;
 973         }
 974
 975         adapter->map_id = 1;
 976         adapter->napi = kcalloc(adapter->req_rx_queues,
 977                                 sizeof(struct napi_struct), GFP_KERNEL);
 978         if (!adapter->napi)
 979                 return -ENOMEM;
 980
 981         for (i = 0; i < adapter->req_rx_queues; i++) {
 982                 netdev_dbg(netdev, "Adding napi[%d]\n", i);
 983                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 984                                NAPI_POLL_WEIGHT);
 985         }
 986
 987         send_map_query(adapter);
 988
 989         rc = init_rx_pools(netdev);
 990         if (rc)
 991                 return rc;
 992
 993         rc = init_tx_pools(netdev);
 994         return rc;
 995 }
 996
 997 static int __ibmvnic_open(struct net_device *netdev)
 998 {
 999         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1000         enum vnic_state prev_state = adapter->state;
1001         int i, rc;
1002
1003         adapter->state = VNIC_OPENING;
1004         replenish_pools(adapter);
1005         ibmvnic_napi_enable(adapter);
1006
1007         /* We're ready to receive frames, enable the sub-crq interrupts and
1008          * set the logical link state to up
1009          */
1010         for (i = 0; i < adapter->req_rx_queues; i++) {
1011                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1012                 if (prev_state == VNIC_CLOSED)
1013                         enable_irq(adapter->rx_scrq[i]->irq);
1014                 else
1015                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1016         }
1017
1018         for (i = 0; i < adapter->req_tx_queues; i++) {
1019                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1020                 if (prev_state == VNIC_CLOSED)
1021                         enable_irq(adapter->tx_scrq[i]->irq);
1022                 else
1023                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1024         }
1025
1026         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1027         if (rc) {
1028                 for (i = 0; i < adapter->req_rx_queues; i++)
1029                         napi_disable(&adapter->napi[i]);
1030                 release_resources(adapter);
1031                 return rc;
1032         }
1033
1034         netif_tx_start_all_queues(netdev);
1035
1036         if (prev_state == VNIC_CLOSED) {
1037                 for (i = 0; i < adapter->req_rx_queues; i++)
1038                         napi_schedule(&adapter->napi[i]);
1039         }
1040
1041         adapter->state = VNIC_OPEN;
1042         return rc;
1043 }
1044
1045 static int ibmvnic_open(struct net_device *netdev)
1046 {
1047         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1048         int rc;
1049
1050         mutex_lock(&adapter->reset_lock);
1051
1052         if (adapter->state != VNIC_CLOSED) {
1053                 rc = ibmvnic_login(netdev);
1054                 if (rc) {
1055                         mutex_unlock(&adapter->reset_lock);
1056                         return rc;
1057                 }
1058
1059                 rc = init_resources(adapter);
1060                 if (rc) {
1061                         netdev_err(netdev, "failed to initialize resources\n");
1062                         release_resources(adapter);
1063                         mutex_unlock(&adapter->reset_lock);
1064                         return rc;
1065                 }
1066         }
1067
1068         rc = __ibmvnic_open(netdev);
1069         netif_carrier_on(netdev);
1070
1071         mutex_unlock(&adapter->reset_lock);
1072
1073         return rc;
1074 }
1075
1076 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1077 {
1078         struct ibmvnic_tx_pool *tx_pool;
1079         u64 tx_entries;
1080         int tx_scrqs;
1081         int i, j;
1082
1083         if (!adapter->tx_pool)
1084                 return;
1085
1086         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1087         tx_entries = adapter->req_tx_entries_per_subcrq;
1088
1089         /* Free any remaining skbs in the tx buffer pools */
1090         for (i = 0; i < tx_scrqs; i++) {
1091                 tx_pool = &adapter->tx_pool[i];
1092                 if (!tx_pool)
1093                         continue;
1094
1095                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1096                 for (j = 0; j < tx_entries; j++) {
1097                         if (tx_pool->tx_buff[j].skb) {
1098                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1099                                 tx_pool->tx_buff[j].skb = NULL;
1100                         }
1101                 }
1102         }
1103 }
1104
1105 static int __ibmvnic_close(struct net_device *netdev)
1106 {
1107         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1108         int rc = 0;
1109         int i;
1110
1111         adapter->state = VNIC_CLOSING;
1112
1113         /* ensure that transmissions are stopped if called by do_reset */
1114         if (adapter->resetting)
1115                 netif_tx_disable(netdev);
1116         else
1117                 netif_tx_stop_all_queues(netdev);
1118
1119         ibmvnic_napi_disable(adapter);
1120
1121         if (adapter->tx_scrq) {
1122                 for (i = 0; i < adapter->req_tx_queues; i++)
1123                         if (adapter->tx_scrq[i]->irq) {
1124                                 netdev_dbg(adapter->netdev,
1125                                            "Disabling tx_scrq[%d] irq\n", i);
1126                                 disable_irq(adapter->tx_scrq[i]->irq);
1127                         }
1128         }
1129
1130         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1131         if (rc)
1132                 return rc;
1133
1134         if (adapter->rx_scrq) {
1135                 for (i = 0; i < adapter->req_rx_queues; i++) {
1136                         int retries = 10;
1137
1138                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1139                                 retries--;
1140                                 mdelay(100);
1141
1142                                 if (retries == 0)
1143                                         break;
1144                         }
1145
1146                         if (adapter->rx_scrq[i]->irq) {
1147                                 netdev_dbg(adapter->netdev,
1148                                            "Disabling rx_scrq[%d] irq\n", i);
1149                                 disable_irq(adapter->rx_scrq[i]->irq);
1150                         }
1151                 }
1152         }
1153
1154         clean_tx_pools(adapter);
1155         adapter->state = VNIC_CLOSED;
1156         return rc;
1157 }
1158
1159 static int ibmvnic_close(struct net_device *netdev)
1160 {
1161         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1162         int rc;
1163
1164         mutex_lock(&adapter->reset_lock);
1165         rc = __ibmvnic_close(netdev);
1166         mutex_unlock(&adapter->reset_lock);
1167
1168         return rc;
1169 }
1170
1171 /**
1172  * build_hdr_data - creates L2/L3/L4 header data buffer
1173  * @hdr_field - bitfield determining needed headers
1174  * @skb - socket buffer
1175  * @hdr_len - array of header lengths
1176  * @tot_len - total length of data
1177  *
1178  * Reads hdr_field to determine which headers are needed by firmware.
1179  * Builds a buffer containing these headers.  Saves individual header
1180  * lengths and total buffer length to be used to build descriptors.
1181  */
1182 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1183                           int *hdr_len, u8 *hdr_data)
1184 {
1185         int len = 0;
1186         u8 *hdr;
1187
1188         hdr_len[0] = sizeof(struct ethhdr);
1189
1190         if (skb->protocol == htons(ETH_P_IP)) {
1191                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1192                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1193                         hdr_len[2] = tcp_hdrlen(skb);
1194                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1195                         hdr_len[2] = sizeof(struct udphdr);
1196         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1197                 hdr_len[1] = sizeof(struct ipv6hdr);
1198                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1199                         hdr_len[2] = tcp_hdrlen(skb);
1200                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1201                         hdr_len[2] = sizeof(struct udphdr);
1202         } else if (skb->protocol == htons(ETH_P_ARP)) {
1203                 hdr_len[1] = arp_hdr_len(skb->dev);
1204                 hdr_len[2] = 0;
1205         }
1206
1207         memset(hdr_data, 0, 120);
1208         if ((hdr_field >> 6) & 1) {
1209                 hdr = skb_mac_header(skb);
1210                 memcpy(hdr_data, hdr, hdr_len[0]);
1211                 len += hdr_len[0];
1212         }
1213
1214         if ((hdr_field >> 5) & 1) {
1215                 hdr = skb_network_header(skb);
1216                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1217                 len += hdr_len[1];
1218         }
1219
1220         if ((hdr_field >> 4) & 1) {
1221                 hdr = skb_transport_header(skb);
1222                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1223                 len += hdr_len[2];
1224         }
1225         return len;
1226 }
1227
1228 /**
1229  * create_hdr_descs - create header and header extension descriptors
1230  * @hdr_field - bitfield determining needed headers
1231  * @data - buffer containing header data
1232  * @len - length of data buffer
1233  * @hdr_len - array of individual header lengths
1234  * @scrq_arr - descriptor array
1235  *
1236  * Creates header and, if needed, header extension descriptors and
1237  * places them in a descriptor array, scrq_arr
1238  */
1239
1240 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1241                             union sub_crq *scrq_arr)
1242 {
1243         union sub_crq hdr_desc;
1244         int tmp_len = len;
1245         int num_descs = 0;
1246         u8 *data, *cur;
1247         int tmp;
1248
1249         while (tmp_len > 0) {
1250                 cur = hdr_data + len - tmp_len;
1251
1252                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1253                 if (cur != hdr_data) {
1254                         data = hdr_desc.hdr_ext.data;
1255                         tmp = tmp_len > 29 ? 29 : tmp_len;
1256                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1257                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1258                         hdr_desc.hdr_ext.len = tmp;
1259                 } else {
1260                         data = hdr_desc.hdr.data;
1261                         tmp = tmp_len > 24 ? 24 : tmp_len;
1262                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1263                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1264                         hdr_desc.hdr.len = tmp;
1265                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1266                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1267                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1268                         hdr_desc.hdr.flag = hdr_field << 1;
1269                 }
1270                 memcpy(data, cur, tmp);
1271                 tmp_len -= tmp;
1272                 *scrq_arr = hdr_desc;
1273                 scrq_arr++;
1274                 num_descs++;
1275         }
1276
1277         return num_descs;
1278 }
1279
1280 /**
1281  * build_hdr_descs_arr - build a header descriptor array
1282  * @skb - socket buffer
1283  * @num_entries - number of descriptors to be sent
1284  * @subcrq - first TX descriptor
1285  * @hdr_field - bit field determining which headers will be sent
1286  *
1287  * This function will build a TX descriptor array with applicable
1288  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1289  */
1290
1291 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1292                                 int *num_entries, u8 hdr_field)
1293 {
1294         int hdr_len[3] = {0, 0, 0};
1295         int tot_len;
1296         u8 *hdr_data = txbuff->hdr_data;
1297
1298         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1299                                  txbuff->hdr_data);
1300         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1301                          txbuff->indir_arr + 1);
1302 }
1303
1304 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1305 {
1306         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1307         int queue_num = skb_get_queue_mapping(skb);
1308         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1309         struct device *dev = &adapter->vdev->dev;
1310         struct ibmvnic_tx_buff *tx_buff = NULL;
1311         struct ibmvnic_sub_crq_queue *tx_scrq;
1312         struct ibmvnic_tx_pool *tx_pool;
1313         unsigned int tx_send_failed = 0;
1314         unsigned int tx_map_failed = 0;
1315         unsigned int tx_dropped = 0;
1316         unsigned int tx_packets = 0;
1317         unsigned int tx_bytes = 0;
1318         dma_addr_t data_dma_addr;
1319         struct netdev_queue *txq;
1320         unsigned long lpar_rc;
1321         union sub_crq tx_crq;
1322         unsigned int offset;
1323         int num_entries = 1;
1324         unsigned char *dst;
1325         u64 *handle_array;
1326         int index = 0;
1327         u8 proto = 0;
1328         int ret = 0;
1329
1330         if (adapter->resetting) {
1331                 if (!netif_subqueue_stopped(netdev, skb))
1332                         netif_stop_subqueue(netdev, queue_num);
1333                 dev_kfree_skb_any(skb);
1334
1335                 tx_send_failed++;
1336                 tx_dropped++;
1337                 ret = NETDEV_TX_OK;
1338                 goto out;
1339         }
1340
1341         tx_pool = &adapter->tx_pool[queue_num];
1342         tx_scrq = adapter->tx_scrq[queue_num];
1343         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1344         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1345                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1346
1347         index = tx_pool->free_map[tx_pool->consumer_index];
1348
1349         if (skb_is_gso(skb)) {
1350                 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1351                 dst = tx_pool->tso_ltb.buff + offset;
1352                 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1353                 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1354                 tx_pool->tso_index++;
1355                 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1356                         tx_pool->tso_index = 0;
1357         } else {
1358                 offset = index * adapter->req_mtu;
1359                 dst = tx_pool->long_term_buff.buff + offset;
1360                 memset(dst, 0, adapter->req_mtu);
1361                 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1362         }
1363
1364         if (skb_shinfo(skb)->nr_frags) {
1365                 int cur, i;
1366
1367                 /* Copy the head */
1368                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1369                 cur = skb_headlen(skb);
1370
1371                 /* Copy the frags */
1372                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1373                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1374
1375                         memcpy(dst + cur,
1376                                page_address(skb_frag_page(frag)) +
1377                                frag->page_offset, skb_frag_size(frag));
1378                         cur += skb_frag_size(frag);
1379                 }
1380         } else {
1381                 skb_copy_from_linear_data(skb, dst, skb->len);
1382         }
1383
1384         tx_pool->consumer_index =
1385             (tx_pool->consumer_index + 1) %
1386                 adapter->req_tx_entries_per_subcrq;
1387
1388         tx_buff = &tx_pool->tx_buff[index];
1389         tx_buff->skb = skb;
1390         tx_buff->data_dma[0] = data_dma_addr;
1391         tx_buff->data_len[0] = skb->len;
1392         tx_buff->index = index;
1393         tx_buff->pool_index = queue_num;
1394         tx_buff->last_frag = true;
1395
1396         memset(&tx_crq, 0, sizeof(tx_crq));
1397         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1398         tx_crq.v1.type = IBMVNIC_TX_DESC;
1399         tx_crq.v1.n_crq_elem = 1;
1400         tx_crq.v1.n_sge = 1;
1401         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1402         tx_crq.v1.correlator = cpu_to_be32(index);
1403         if (skb_is_gso(skb))
1404                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1405         else
1406                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1407         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1408         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1409
1410         if (adapter->vlan_header_insertion) {
1411                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1412                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1413         }
1414
1415         if (skb->protocol == htons(ETH_P_IP)) {
1416                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1417                 proto = ip_hdr(skb)->protocol;
1418         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1419                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1420                 proto = ipv6_hdr(skb)->nexthdr;
1421         }
1422
1423         if (proto == IPPROTO_TCP)
1424                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1425         else if (proto == IPPROTO_UDP)
1426                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1427
1428         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1429                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1430                 hdrs += 2;
1431         }
1432         if (skb_is_gso(skb)) {
1433                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1434                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1435                 hdrs += 2;
1436         }
1437         /* determine if l2/3/4 headers are sent to firmware */
1438         if ((*hdrs >> 7) & 1) {
1439                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1440                 tx_crq.v1.n_crq_elem = num_entries;
1441                 tx_buff->indir_arr[0] = tx_crq;
1442                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1443                                                     sizeof(tx_buff->indir_arr),
1444                                                     DMA_TO_DEVICE);
1445                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1446                         dev_kfree_skb_any(skb);
1447                         tx_buff->skb = NULL;
1448                         if (!firmware_has_feature(FW_FEATURE_CMO))
1449                                 dev_err(dev, "tx: unable to map descriptor array\n");
1450                         tx_map_failed++;
1451                         tx_dropped++;
1452                         ret = NETDEV_TX_OK;
1453                         goto out;
1454                 }
1455                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1456                                                (u64)tx_buff->indir_dma,
1457                                                (u64)num_entries);
1458         } else {
1459                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1460                                       &tx_crq);
1461         }
1462         if (lpar_rc != H_SUCCESS) {
1463                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1464
1465                 if (tx_pool->consumer_index == 0)
1466                         tx_pool->consumer_index =
1467                                 adapter->req_tx_entries_per_subcrq - 1;
1468                 else
1469                         tx_pool->consumer_index--;
1470
1471                 dev_kfree_skb_any(skb);
1472                 tx_buff->skb = NULL;
1473
1474                 if (lpar_rc == H_CLOSED) {
1475                         /* Disable TX and report carrier off if queue is closed.
1476                          * Firmware guarantees that a signal will be sent to the
1477                          * driver, triggering a reset or some other action.
1478                          */
1479                         netif_tx_stop_all_queues(netdev);
1480                         netif_carrier_off(netdev);
1481                 }
1482
1483                 tx_send_failed++;
1484                 tx_dropped++;
1485                 ret = NETDEV_TX_OK;
1486                 goto out;
1487         }
1488
1489         if (atomic_inc_return(&tx_scrq->used)
1490                                         >= adapter->req_tx_entries_per_subcrq) {
1491                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1492                 netif_stop_subqueue(netdev, queue_num);
1493         }
1494
1495         tx_packets++;
1496         tx_bytes += skb->len;
1497         txq->trans_start = jiffies;
1498         ret = NETDEV_TX_OK;
1499
1500 out:
1501         netdev->stats.tx_dropped += tx_dropped;
1502         netdev->stats.tx_bytes += tx_bytes;
1503         netdev->stats.tx_packets += tx_packets;
1504         adapter->tx_send_failed += tx_send_failed;
1505         adapter->tx_map_failed += tx_map_failed;
1506         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1507         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1508         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1509
1510         return ret;
1511 }
1512
1513 static void ibmvnic_set_multi(struct net_device *netdev)
1514 {
1515         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1516         struct netdev_hw_addr *ha;
1517         union ibmvnic_crq crq;
1518
1519         memset(&crq, 0, sizeof(crq));
1520         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1521         crq.request_capability.cmd = REQUEST_CAPABILITY;
1522
1523         if (netdev->flags & IFF_PROMISC) {
1524                 if (!adapter->promisc_supported)
1525                         return;
1526         } else {
1527                 if (netdev->flags & IFF_ALLMULTI) {
1528                         /* Accept all multicast */
1529                         memset(&crq, 0, sizeof(crq));
1530                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1531                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1532                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1533                         ibmvnic_send_crq(adapter, &crq);
1534                 } else if (netdev_mc_empty(netdev)) {
1535                         /* Reject all multicast */
1536                         memset(&crq, 0, sizeof(crq));
1537                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1538                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1539                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1540                         ibmvnic_send_crq(adapter, &crq);
1541                 } else {
1542                         /* Accept one or more multicast(s) */
1543                         netdev_for_each_mc_addr(ha, netdev) {
1544                                 memset(&crq, 0, sizeof(crq));
1545                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1546                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1547                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1548                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1549                                                 ha->addr);
1550                                 ibmvnic_send_crq(adapter, &crq);
1551                         }
1552                 }
1553         }
1554 }
1555
1556 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1557 {
1558         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1559         struct sockaddr *addr = p;
1560         union ibmvnic_crq crq;
1561
1562         if (!is_valid_ether_addr(addr->sa_data))
1563                 return -EADDRNOTAVAIL;
1564
1565         memset(&crq, 0, sizeof(crq));
1566         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1567         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1568         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1569
1570         init_completion(&adapter->fw_done);
1571         ibmvnic_send_crq(adapter, &crq);
1572         wait_for_completion(&adapter->fw_done);
1573         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1574         return adapter->fw_done_rc ? -EIO : 0;
1575 }
1576
1577 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1578 {
1579         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1580         struct sockaddr *addr = p;
1581         int rc;
1582
1583         if (adapter->state == VNIC_PROBED) {
1584                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1585                 adapter->mac_change_pending = true;
1586                 return 0;
1587         }
1588
1589         rc = __ibmvnic_set_mac(netdev, addr);
1590
1591         return rc;
1592 }
1593
1594 /**
1595  * do_reset returns zero if we are able to keep processing reset events, or
1596  * non-zero if we hit a fatal error and must halt.
1597  */
1598 static int do_reset(struct ibmvnic_adapter *adapter,
1599                     struct ibmvnic_rwi *rwi, u32 reset_state)
1600 {
1601         u64 old_num_rx_queues, old_num_tx_queues;
1602         struct net_device *netdev = adapter->netdev;
1603         int i, rc;
1604
1605         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1606                    rwi->reset_reason);
1607
1608         netif_carrier_off(netdev);
1609         adapter->reset_reason = rwi->reset_reason;
1610
1611         old_num_rx_queues = adapter->req_rx_queues;
1612         old_num_tx_queues = adapter->req_tx_queues;
1613
1614         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1615                 rc = ibmvnic_reenable_crq_queue(adapter);
1616                 if (rc)
1617                         return 0;
1618         }
1619
1620         rc = __ibmvnic_close(netdev);
1621         if (rc)
1622                 return rc;
1623
1624         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1625             adapter->wait_for_reset) {
1626                 release_resources(adapter);
1627                 release_sub_crqs(adapter);
1628                 release_crq_queue(adapter);
1629         }
1630
1631         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1632                 /* remove the closed state so when we call open it appears
1633                  * we are coming from the probed state.
1634                  */
1635                 adapter->state = VNIC_PROBED;
1636
1637                 rc = ibmvnic_init(adapter);
1638                 if (rc)
1639                         return IBMVNIC_INIT_FAILED;
1640
1641                 /* If the adapter was in PROBE state prior to the reset,
1642                  * exit here.
1643                  */
1644                 if (reset_state == VNIC_PROBED)
1645                         return 0;
1646
1647                 rc = ibmvnic_login(netdev);
1648                 if (rc) {
1649                         adapter->state = VNIC_PROBED;
1650                         return 0;
1651                 }
1652
1653                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1654                     adapter->wait_for_reset) {
1655                         rc = init_resources(adapter);
1656                         if (rc)
1657                                 return rc;
1658                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1659                            adapter->req_tx_queues != old_num_tx_queues) {
1660                         adapter->map_id = 1;
1661                         release_rx_pools(adapter);
1662                         release_tx_pools(adapter);
1663                         init_rx_pools(netdev);
1664                         init_tx_pools(netdev);
1665                 } else {
1666                         rc = reset_tx_pools(adapter);
1667                         if (rc)
1668                                 return rc;
1669
1670                         rc = reset_rx_pools(adapter);
1671                         if (rc)
1672                                 return rc;
1673
1674                         if (reset_state == VNIC_CLOSED)
1675                                 return 0;
1676                 }
1677         }
1678
1679         rc = __ibmvnic_open(netdev);
1680         if (rc) {
1681                 if (list_empty(&adapter->rwi_list))
1682                         adapter->state = VNIC_CLOSED;
1683                 else
1684                         adapter->state = reset_state;
1685
1686                 return 0;
1687         }
1688
1689         /* kick napi */
1690         for (i = 0; i < adapter->req_rx_queues; i++)
1691                 napi_schedule(&adapter->napi[i]);
1692
1693         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1694                 netdev_notify_peers(netdev);
1695
1696         netif_carrier_on(netdev);
1697
1698         return 0;
1699 }
1700
1701 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1702 {
1703         struct ibmvnic_rwi *rwi;
1704
1705         mutex_lock(&adapter->rwi_lock);
1706
1707         if (!list_empty(&adapter->rwi_list)) {
1708                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1709                                        list);
1710                 list_del(&rwi->list);
1711         } else {
1712                 rwi = NULL;
1713         }
1714
1715         mutex_unlock(&adapter->rwi_lock);
1716         return rwi;
1717 }
1718
1719 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1720 {
1721         struct ibmvnic_rwi *rwi;
1722
1723         rwi = get_next_rwi(adapter);
1724         while (rwi) {
1725                 kfree(rwi);
1726                 rwi = get_next_rwi(adapter);
1727         }
1728 }
1729
1730 static void __ibmvnic_reset(struct work_struct *work)
1731 {
1732         struct ibmvnic_rwi *rwi;
1733         struct ibmvnic_adapter *adapter;
1734         struct net_device *netdev;
1735         u32 reset_state;
1736         int rc = 0;
1737
1738         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1739         netdev = adapter->netdev;
1740
1741         mutex_lock(&adapter->reset_lock);
1742         adapter->resetting = true;
1743         reset_state = adapter->state;
1744
1745         rwi = get_next_rwi(adapter);
1746         while (rwi) {
1747                 rc = do_reset(adapter, rwi, reset_state);
1748                 kfree(rwi);
1749                 if (rc && rc != IBMVNIC_INIT_FAILED)
1750                         break;
1751
1752                 rwi = get_next_rwi(adapter);
1753         }
1754
1755         if (adapter->wait_for_reset) {
1756                 adapter->wait_for_reset = false;
1757                 adapter->reset_done_rc = rc;
1758                 complete(&adapter->reset_done);
1759         }
1760
1761         if (rc) {
1762                 netdev_dbg(adapter->netdev, "Reset failed\n");
1763                 free_all_rwi(adapter);
1764                 mutex_unlock(&adapter->reset_lock);
1765                 return;
1766         }
1767
1768         adapter->resetting = false;
1769         mutex_unlock(&adapter->reset_lock);
1770 }
1771
1772 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1773                           enum ibmvnic_reset_reason reason)
1774 {
1775         struct ibmvnic_rwi *rwi, *tmp;
1776         struct net_device *netdev = adapter->netdev;
1777         struct list_head *entry;
1778
1779         if (adapter->state == VNIC_REMOVING ||
1780             adapter->state == VNIC_REMOVED) {
1781                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1782                 return;
1783         }
1784
1785         if (adapter->state == VNIC_PROBING) {
1786                 netdev_warn(netdev, "Adapter reset during probe\n");
1787                 adapter->init_done_rc = EAGAIN;
1788                 return;
1789         }
1790
1791         mutex_lock(&adapter->rwi_lock);
1792
1793         list_for_each(entry, &adapter->rwi_list) {
1794                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1795                 if (tmp->reset_reason == reason) {
1796                         netdev_dbg(netdev, "Skipping matching reset\n");
1797                         mutex_unlock(&adapter->rwi_lock);
1798                         return;
1799                 }
1800         }
1801
1802         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1803         if (!rwi) {
1804                 mutex_unlock(&adapter->rwi_lock);
1805                 ibmvnic_close(netdev);
1806                 return;
1807         }
1808
1809         rwi->reset_reason = reason;
1810         list_add_tail(&rwi->list, &adapter->rwi_list);
1811         mutex_unlock(&adapter->rwi_lock);
1812
1813         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1814         schedule_work(&adapter->ibmvnic_reset);
1815 }
1816
1817 static void ibmvnic_tx_timeout(struct net_device *dev)
1818 {
1819         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1820
1821         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1822 }
1823
1824 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1825                                   struct ibmvnic_rx_buff *rx_buff)
1826 {
1827         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1828
1829         rx_buff->skb = NULL;
1830
1831         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1832         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1833
1834         atomic_dec(&pool->available);
1835 }
1836
1837 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1838 {
1839         struct net_device *netdev = napi->dev;
1840         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1841         int scrq_num = (int)(napi - adapter->napi);
1842         int frames_processed = 0;
1843
1844 restart_poll:
1845         while (frames_processed < budget) {
1846                 struct sk_buff *skb;
1847                 struct ibmvnic_rx_buff *rx_buff;
1848                 union sub_crq *next;
1849                 u32 length;
1850                 u16 offset;
1851                 u8 flags = 0;
1852
1853                 if (unlikely(adapter->resetting &&
1854                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1855                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1856                         napi_complete_done(napi, frames_processed);
1857                         return frames_processed;
1858                 }
1859
1860                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1861                         break;
1862                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1863                 rx_buff =
1864                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1865                                                           rx_comp.correlator);
1866                 /* do error checking */
1867                 if (next->rx_comp.rc) {
1868                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1869                                    be16_to_cpu(next->rx_comp.rc));
1870                         /* free the entry */
1871                         next->rx_comp.first = 0;
1872                         remove_buff_from_pool(adapter, rx_buff);
1873                         continue;
1874                 }
1875
1876                 length = be32_to_cpu(next->rx_comp.len);
1877                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1878                 flags = next->rx_comp.flags;
1879                 skb = rx_buff->skb;
1880                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1881                                         length);
1882
1883                 /* VLAN Header has been stripped by the system firmware and
1884                  * needs to be inserted by the driver
1885                  */
1886                 if (adapter->rx_vlan_header_insertion &&
1887                     (flags & IBMVNIC_VLAN_STRIPPED))
1888                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1889                                                ntohs(next->rx_comp.vlan_tci));
1890
1891                 /* free the entry */
1892                 next->rx_comp.first = 0;
1893                 remove_buff_from_pool(adapter, rx_buff);
1894
1895                 skb_put(skb, length);
1896                 skb->protocol = eth_type_trans(skb, netdev);
1897                 skb_record_rx_queue(skb, scrq_num);
1898
1899                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1900                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1901                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1902                 }
1903
1904                 length = skb->len;
1905                 napi_gro_receive(napi, skb); /* send it up */
1906                 netdev->stats.rx_packets++;
1907                 netdev->stats.rx_bytes += length;
1908                 adapter->rx_stats_buffers[scrq_num].packets++;
1909                 adapter->rx_stats_buffers[scrq_num].bytes += length;
1910                 frames_processed++;
1911         }
1912
1913         if (adapter->state != VNIC_CLOSING)
1914                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1915
1916         if (frames_processed < budget) {
1917                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1918                 napi_complete_done(napi, frames_processed);
1919                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1920                     napi_reschedule(napi)) {
1921                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1922                         goto restart_poll;
1923                 }
1924         }
1925         return frames_processed;
1926 }
1927
1928 #ifdef CONFIG_NET_POLL_CONTROLLER
1929 static void ibmvnic_netpoll_controller(struct net_device *dev)
1930 {
1931         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1932         int i;
1933
1934         replenish_pools(netdev_priv(dev));
1935         for (i = 0; i < adapter->req_rx_queues; i++)
1936                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1937                                      adapter->rx_scrq[i]);
1938 }
1939 #endif
1940
1941 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1942 {
1943         adapter->fallback.mtu = adapter->req_mtu;
1944         adapter->fallback.rx_queues = adapter->req_rx_queues;
1945         adapter->fallback.tx_queues = adapter->req_tx_queues;
1946         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1947         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1948
1949         init_completion(&adapter->reset_done);
1950         ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1951         adapter->wait_for_reset = true;
1952         wait_for_completion(&adapter->reset_done);
1953
1954         if (adapter->reset_done_rc) {
1955                 adapter->desired.mtu = adapter->fallback.mtu;
1956                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1957                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1958                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1959                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1960
1961                 init_completion(&adapter->reset_done);
1962                 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1963                 wait_for_completion(&adapter->reset_done);
1964         }
1965         adapter->wait_for_reset = false;
1966
1967         return adapter->reset_done_rc;
1968 }
1969
1970 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1971 {
1972         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1973
1974         adapter->desired.mtu = new_mtu + ETH_HLEN;
1975
1976         return wait_for_reset(adapter);
1977 }
1978
1979 static const struct net_device_ops ibmvnic_netdev_ops = {
1980         .ndo_open               = ibmvnic_open,
1981         .ndo_stop               = ibmvnic_close,
1982         .ndo_start_xmit         = ibmvnic_xmit,
1983         .ndo_set_rx_mode        = ibmvnic_set_multi,
1984         .ndo_set_mac_address    = ibmvnic_set_mac,
1985         .ndo_validate_addr      = eth_validate_addr,
1986         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1987 #ifdef CONFIG_NET_POLL_CONTROLLER
1988         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1989 #endif
1990         .ndo_change_mtu         = ibmvnic_change_mtu,
1991 };
1992
1993 /* ethtool functions */
1994
1995 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1996                                       struct ethtool_link_ksettings *cmd)
1997 {
1998         u32 supported, advertising;
1999
2000         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2001                           SUPPORTED_FIBRE);
2002         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2003                             ADVERTISED_FIBRE);
2004         cmd->base.speed = SPEED_1000;
2005         cmd->base.duplex = DUPLEX_FULL;
2006         cmd->base.port = PORT_FIBRE;
2007         cmd->base.phy_address = 0;
2008         cmd->base.autoneg = AUTONEG_ENABLE;
2009
2010         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2011                                                 supported);
2012         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2013                                                 advertising);
2014
2015         return 0;
2016 }
2017
2018 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2019                                 struct ethtool_drvinfo *info)
2020 {
2021         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2022
2023         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2024         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2025         strlcpy(info->fw_version, adapter->fw_version,
2026                 sizeof(info->fw_version));
2027 }
2028
2029 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2030 {
2031         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2032
2033         return adapter->msg_enable;
2034 }
2035
2036 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2037 {
2038         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2039
2040         adapter->msg_enable = data;
2041 }
2042
2043 static u32 ibmvnic_get_link(struct net_device *netdev)
2044 {
2045         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2046
2047         /* Don't need to send a query because we request a logical link up at
2048          * init and then we wait for link state indications
2049          */
2050         return adapter->logical_link_state;
2051 }
2052
2053 static void ibmvnic_get_ringparam(struct net_device *netdev,
2054                                   struct ethtool_ringparam *ring)
2055 {
2056         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2057
2058         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2059         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2060         ring->rx_mini_max_pending = 0;
2061         ring->rx_jumbo_max_pending = 0;
2062         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2063         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2064         ring->rx_mini_pending = 0;
2065         ring->rx_jumbo_pending = 0;
2066 }
2067
2068 static int ibmvnic_set_ringparam(struct net_device *netdev,
2069                                  struct ethtool_ringparam *ring)
2070 {
2071         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2072
2073         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2074             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2075                 netdev_err(netdev, "Invalid request.\n");
2076                 netdev_err(netdev, "Max tx buffers = %llu\n",
2077                            adapter->max_rx_add_entries_per_subcrq);
2078                 netdev_err(netdev, "Max rx buffers = %llu\n",
2079                            adapter->max_tx_entries_per_subcrq);
2080                 return -EINVAL;
2081         }
2082
2083         adapter->desired.rx_entries = ring->rx_pending;
2084         adapter->desired.tx_entries = ring->tx_pending;
2085
2086         return wait_for_reset(adapter);
2087 }
2088
2089 static void ibmvnic_get_channels(struct net_device *netdev,
2090                                  struct ethtool_channels *channels)
2091 {
2092         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2093
2094         channels->max_rx = adapter->max_rx_queues;
2095         channels->max_tx = adapter->max_tx_queues;
2096         channels->max_other = 0;
2097         channels->max_combined = 0;
2098         channels->rx_count = adapter->req_rx_queues;
2099         channels->tx_count = adapter->req_tx_queues;
2100         channels->other_count = 0;
2101         channels->combined_count = 0;
2102 }
2103
2104 static int ibmvnic_set_channels(struct net_device *netdev,
2105                                 struct ethtool_channels *channels)
2106 {
2107         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2108
2109         adapter->desired.rx_queues = channels->rx_count;
2110         adapter->desired.tx_queues = channels->tx_count;
2111
2112         return wait_for_reset(adapter);
2113 }
2114
2115 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2116 {
2117         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2118         int i;
2119
2120         if (stringset != ETH_SS_STATS)
2121                 return;
2122
2123         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2124                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2125
2126         for (i = 0; i < adapter->req_tx_queues; i++) {
2127                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2128                 data += ETH_GSTRING_LEN;
2129
2130                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2131                 data += ETH_GSTRING_LEN;
2132
2133                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2134                 data += ETH_GSTRING_LEN;
2135         }
2136
2137         for (i = 0; i < adapter->req_rx_queues; i++) {
2138                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2139                 data += ETH_GSTRING_LEN;
2140
2141                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2142                 data += ETH_GSTRING_LEN;
2143
2144                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2145                 data += ETH_GSTRING_LEN;
2146         }
2147 }
2148
2149 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2150 {
2151         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2152
2153         switch (sset) {
2154         case ETH_SS_STATS:
2155                 return ARRAY_SIZE(ibmvnic_stats) +
2156                        adapter->req_tx_queues * NUM_TX_STATS +
2157                        adapter->req_rx_queues * NUM_RX_STATS;
2158         default:
2159                 return -EOPNOTSUPP;
2160         }
2161 }
2162
2163 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2164                                       struct ethtool_stats *stats, u64 *data)
2165 {
2166         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2167         union ibmvnic_crq crq;
2168         int i, j;
2169
2170         memset(&crq, 0, sizeof(crq));
2171         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2172         crq.request_statistics.cmd = REQUEST_STATISTICS;
2173         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2174         crq.request_statistics.len =
2175             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2176
2177         /* Wait for data to be written */
2178         init_completion(&adapter->stats_done);
2179         ibmvnic_send_crq(adapter, &crq);
2180         wait_for_completion(&adapter->stats_done);
2181
2182         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2183                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2184                                                 ibmvnic_stats[i].offset));
2185
2186         for (j = 0; j < adapter->req_tx_queues; j++) {
2187                 data[i] = adapter->tx_stats_buffers[j].packets;
2188                 i++;
2189                 data[i] = adapter->tx_stats_buffers[j].bytes;
2190                 i++;
2191                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2192                 i++;
2193         }
2194
2195         for (j = 0; j < adapter->req_rx_queues; j++) {
2196                 data[i] = adapter->rx_stats_buffers[j].packets;
2197                 i++;
2198                 data[i] = adapter->rx_stats_buffers[j].bytes;
2199                 i++;
2200                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2201                 i++;
2202         }
2203 }
2204
2205 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2206         .get_drvinfo            = ibmvnic_get_drvinfo,
2207         .get_msglevel           = ibmvnic_get_msglevel,
2208         .set_msglevel           = ibmvnic_set_msglevel,
2209         .get_link               = ibmvnic_get_link,
2210         .get_ringparam          = ibmvnic_get_ringparam,
2211         .set_ringparam          = ibmvnic_set_ringparam,
2212         .get_channels           = ibmvnic_get_channels,
2213         .set_channels           = ibmvnic_set_channels,
2214         .get_strings            = ibmvnic_get_strings,
2215         .get_sset_count         = ibmvnic_get_sset_count,
2216         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2217         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2218 };
2219
2220 /* Routines for managing CRQs/sCRQs  */
2221
2222 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2223                                    struct ibmvnic_sub_crq_queue *scrq)
2224 {
2225         int rc;
2226
2227         if (scrq->irq) {
2228                 free_irq(scrq->irq, scrq);
2229                 irq_dispose_mapping(scrq->irq);
2230                 scrq->irq = 0;
2231         }
2232
2233         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2234         scrq->cur = 0;
2235
2236         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2237                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2238         return rc;
2239 }
2240
2241 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2242 {
2243         int i, rc;
2244
2245         for (i = 0; i < adapter->req_tx_queues; i++) {
2246                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2247                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2248                 if (rc)
2249                         return rc;
2250         }
2251
2252         for (i = 0; i < adapter->req_rx_queues; i++) {
2253                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2254                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2255                 if (rc)
2256                         return rc;
2257         }
2258
2259         return rc;
2260 }
2261
2262 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2263                                   struct ibmvnic_sub_crq_queue *scrq)
2264 {
2265         struct device *dev = &adapter->vdev->dev;
2266         long rc;
2267
2268         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2269
2270         /* Close the sub-crqs */
2271         do {
2272                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2273                                         adapter->vdev->unit_address,
2274                                         scrq->crq_num);
2275         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2276
2277         if (rc) {
2278                 netdev_err(adapter->netdev,
2279                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
2280                            scrq->crq_num, rc);
2281         }
2282
2283         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2284                          DMA_BIDIRECTIONAL);
2285         free_pages((unsigned long)scrq->msgs, 2);
2286         kfree(scrq);
2287 }
2288
2289 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2290                                                         *adapter)
2291 {
2292         struct device *dev = &adapter->vdev->dev;
2293         struct ibmvnic_sub_crq_queue *scrq;
2294         int rc;
2295
2296         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2297         if (!scrq)
2298                 return NULL;
2299
2300         scrq->msgs =
2301                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2302         if (!scrq->msgs) {
2303                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2304                 goto zero_page_failed;
2305         }
2306
2307         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2308                                          DMA_BIDIRECTIONAL);
2309         if (dma_mapping_error(dev, scrq->msg_token)) {
2310                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2311                 goto map_failed;
2312         }
2313
2314         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2315                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2316
2317         if (rc == H_RESOURCE)
2318                 rc = ibmvnic_reset_crq(adapter);
2319
2320         if (rc == H_CLOSED) {
2321                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2322         } else if (rc) {
2323                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2324                 goto reg_failed;
2325         }
2326
2327         scrq->adapter = adapter;
2328         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2329         spin_lock_init(&scrq->lock);
2330
2331         netdev_dbg(adapter->netdev,
2332                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2333                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2334
2335         return scrq;
2336
2337 reg_failed:
2338         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2339                          DMA_BIDIRECTIONAL);
2340 map_failed:
2341         free_pages((unsigned long)scrq->msgs, 2);
2342 zero_page_failed:
2343         kfree(scrq);
2344
2345         return NULL;
2346 }
2347
2348 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2349 {
2350         int i;
2351
2352         if (adapter->tx_scrq) {
2353                 for (i = 0; i < adapter->req_tx_queues; i++) {
2354                         if (!adapter->tx_scrq[i])
2355                                 continue;
2356
2357                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2358                                    i);
2359                         if (adapter->tx_scrq[i]->irq) {
2360                                 free_irq(adapter->tx_scrq[i]->irq,
2361                                          adapter->tx_scrq[i]);
2362                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2363                                 adapter->tx_scrq[i]->irq = 0;
2364                         }
2365
2366                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2367                 }
2368
2369                 kfree(adapter->tx_scrq);
2370                 adapter->tx_scrq = NULL;
2371         }
2372
2373         if (adapter->rx_scrq) {
2374                 for (i = 0; i < adapter->req_rx_queues; i++) {
2375                         if (!adapter->rx_scrq[i])
2376                                 continue;
2377
2378                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2379                                    i);
2380                         if (adapter->rx_scrq[i]->irq) {
2381                                 free_irq(adapter->rx_scrq[i]->irq,
2382                                          adapter->rx_scrq[i]);
2383                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2384                                 adapter->rx_scrq[i]->irq = 0;
2385                         }
2386
2387                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2388                 }
2389
2390                 kfree(adapter->rx_scrq);
2391                 adapter->rx_scrq = NULL;
2392         }
2393 }
2394
2395 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2396                             struct ibmvnic_sub_crq_queue *scrq)
2397 {
2398         struct device *dev = &adapter->vdev->dev;
2399         unsigned long rc;
2400
2401         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2402                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2403         if (rc)
2404                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2405                         scrq->hw_irq, rc);
2406         return rc;
2407 }
2408
2409 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2410                            struct ibmvnic_sub_crq_queue *scrq)
2411 {
2412         struct device *dev = &adapter->vdev->dev;
2413         unsigned long rc;
2414
2415         if (scrq->hw_irq > 0x100000000ULL) {
2416                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2417                 return 1;
2418         }
2419
2420         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2421                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2422         if (rc)
2423                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2424                         scrq->hw_irq, rc);
2425         return rc;
2426 }
2427
2428 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2429                                struct ibmvnic_sub_crq_queue *scrq)
2430 {
2431         struct device *dev = &adapter->vdev->dev;
2432         struct ibmvnic_tx_buff *txbuff;
2433         union sub_crq *next;
2434         int index;
2435         int i, j;
2436         u8 first;
2437
2438 restart_loop:
2439         while (pending_scrq(adapter, scrq)) {
2440                 unsigned int pool = scrq->pool_index;
2441
2442                 next = ibmvnic_next_scrq(adapter, scrq);
2443                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2444                         if (next->tx_comp.rcs[i]) {
2445                                 dev_err(dev, "tx error %x\n",
2446                                         next->tx_comp.rcs[i]);
2447                                 continue;
2448                         }
2449                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2450                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2451
2452                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2453                                 if (!txbuff->data_dma[j])
2454                                         continue;
2455
2456                                 txbuff->data_dma[j] = 0;
2457                         }
2458                         /* if sub_crq was sent indirectly */
2459                         first = txbuff->indir_arr[0].generic.first;
2460                         if (first == IBMVNIC_CRQ_CMD) {
2461                                 dma_unmap_single(dev, txbuff->indir_dma,
2462                                                  sizeof(txbuff->indir_arr),
2463                                                  DMA_TO_DEVICE);
2464                         }
2465
2466                         if (txbuff->last_frag) {
2467                                 dev_kfree_skb_any(txbuff->skb);
2468                                 txbuff->skb = NULL;
2469                         }
2470
2471                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2472                                                      producer_index] = index;
2473                         adapter->tx_pool[pool].producer_index =
2474                             (adapter->tx_pool[pool].producer_index + 1) %
2475                             adapter->req_tx_entries_per_subcrq;
2476                 }
2477                 /* remove tx_comp scrq*/
2478                 next->tx_comp.first = 0;
2479
2480                 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2481                     (adapter->req_tx_entries_per_subcrq / 2) &&
2482                     __netif_subqueue_stopped(adapter->netdev,
2483                                              scrq->pool_index)) {
2484                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2485                         netdev_info(adapter->netdev, "Started queue %d\n",
2486                                     scrq->pool_index);
2487                 }
2488         }
2489
2490         enable_scrq_irq(adapter, scrq);
2491
2492         if (pending_scrq(adapter, scrq)) {
2493                 disable_scrq_irq(adapter, scrq);
2494                 goto restart_loop;
2495         }
2496
2497         return 0;
2498 }
2499
2500 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2501 {
2502         struct ibmvnic_sub_crq_queue *scrq = instance;
2503         struct ibmvnic_adapter *adapter = scrq->adapter;
2504
2505         disable_scrq_irq(adapter, scrq);
2506         ibmvnic_complete_tx(adapter, scrq);
2507
2508         return IRQ_HANDLED;
2509 }
2510
2511 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2512 {
2513         struct ibmvnic_sub_crq_queue *scrq = instance;
2514         struct ibmvnic_adapter *adapter = scrq->adapter;
2515
2516         /* When booting a kdump kernel we can hit pending interrupts
2517          * prior to completing driver initialization.
2518          */
2519         if (unlikely(adapter->state != VNIC_OPEN))
2520                 return IRQ_NONE;
2521
2522         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2523
2524         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2525                 disable_scrq_irq(adapter, scrq);
2526                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2527         }
2528
2529         return IRQ_HANDLED;
2530 }
2531
2532 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2533 {
2534         struct device *dev = &adapter->vdev->dev;
2535         struct ibmvnic_sub_crq_queue *scrq;
2536         int i = 0, j = 0;
2537         int rc = 0;
2538
2539         for (i = 0; i < adapter->req_tx_queues; i++) {
2540                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2541                            i);
2542                 scrq = adapter->tx_scrq[i];
2543                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2544
2545                 if (!scrq->irq) {
2546                         rc = -EINVAL;
2547                         dev_err(dev, "Error mapping irq\n");
2548                         goto req_tx_irq_failed;
2549                 }
2550
2551                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2552                                  0, "ibmvnic_tx", scrq);
2553
2554                 if (rc) {
2555                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2556                                 scrq->irq, rc);
2557                         irq_dispose_mapping(scrq->irq);
2558                         goto req_rx_irq_failed;
2559                 }
2560         }
2561
2562         for (i = 0; i < adapter->req_rx_queues; i++) {
2563                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2564                            i);
2565                 scrq = adapter->rx_scrq[i];
2566                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2567                 if (!scrq->irq) {
2568                         rc = -EINVAL;
2569                         dev_err(dev, "Error mapping irq\n");
2570                         goto req_rx_irq_failed;
2571                 }
2572                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2573                                  0, "ibmvnic_rx", scrq);
2574                 if (rc) {
2575                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2576                                 scrq->irq, rc);
2577                         irq_dispose_mapping(scrq->irq);
2578                         goto req_rx_irq_failed;
2579                 }
2580         }
2581         return rc;
2582
2583 req_rx_irq_failed:
2584         for (j = 0; j < i; j++) {
2585                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2586                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2587         }
2588         i = adapter->req_tx_queues;
2589 req_tx_irq_failed:
2590         for (j = 0; j < i; j++) {
2591                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2592                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2593         }
2594         release_sub_crqs(adapter);
2595         return rc;
2596 }
2597
2598 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2599 {
2600         struct device *dev = &adapter->vdev->dev;
2601         struct ibmvnic_sub_crq_queue **allqueues;
2602         int registered_queues = 0;
2603         int total_queues;
2604         int more = 0;
2605         int i;
2606
2607         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2608
2609         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2610         if (!allqueues)
2611                 return -1;
2612
2613         for (i = 0; i < total_queues; i++) {
2614                 allqueues[i] = init_sub_crq_queue(adapter);
2615                 if (!allqueues[i]) {
2616                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2617                         break;
2618                 }
2619                 registered_queues++;
2620         }
2621
2622         /* Make sure we were able to register the minimum number of queues */
2623         if (registered_queues <
2624             adapter->min_tx_queues + adapter->min_rx_queues) {
2625                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2626                 goto tx_failed;
2627         }
2628
2629         /* Distribute the failed allocated queues*/
2630         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2631                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2632                 switch (i % 3) {
2633                 case 0:
2634                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2635                                 adapter->req_rx_queues--;
2636                         else
2637                                 more++;
2638                         break;
2639                 case 1:
2640                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2641                                 adapter->req_tx_queues--;
2642                         else
2643                                 more++;
2644                         break;
2645                 }
2646         }
2647
2648         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2649                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2650         if (!adapter->tx_scrq)
2651                 goto tx_failed;
2652
2653         for (i = 0; i < adapter->req_tx_queues; i++) {
2654                 adapter->tx_scrq[i] = allqueues[i];
2655                 adapter->tx_scrq[i]->pool_index = i;
2656         }
2657
2658         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2659                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2660         if (!adapter->rx_scrq)
2661                 goto rx_failed;
2662
2663         for (i = 0; i < adapter->req_rx_queues; i++) {
2664                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2665                 adapter->rx_scrq[i]->scrq_num = i;
2666         }
2667
2668         kfree(allqueues);
2669         return 0;
2670
2671 rx_failed:
2672         kfree(adapter->tx_scrq);
2673         adapter->tx_scrq = NULL;
2674 tx_failed:
2675         for (i = 0; i < registered_queues; i++)
2676                 release_sub_crq_queue(adapter, allqueues[i]);
2677         kfree(allqueues);
2678         return -1;
2679 }
2680
2681 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2682 {
2683         struct device *dev = &adapter->vdev->dev;
2684         union ibmvnic_crq crq;
2685         int max_entries;
2686
2687         if (!retry) {
2688                 /* Sub-CRQ entries are 32 byte long */
2689                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2690
2691                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2692                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2693                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2694                         return;
2695                 }
2696
2697                 if (adapter->desired.mtu)
2698                         adapter->req_mtu = adapter->desired.mtu;
2699                 else
2700                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2701
2702                 if (!adapter->desired.tx_entries)
2703                         adapter->desired.tx_entries =
2704                                         adapter->max_tx_entries_per_subcrq;
2705                 if (!adapter->desired.rx_entries)
2706                         adapter->desired.rx_entries =
2707                                         adapter->max_rx_add_entries_per_subcrq;
2708
2709                 max_entries = IBMVNIC_MAX_LTB_SIZE /
2710                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2711
2712                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2713                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2714                         adapter->desired.tx_entries = max_entries;
2715                 }
2716
2717                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2718                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2719                         adapter->desired.rx_entries = max_entries;
2720                 }
2721
2722                 if (adapter->desired.tx_entries)
2723                         adapter->req_tx_entries_per_subcrq =
2724                                         adapter->desired.tx_entries;
2725                 else
2726                         adapter->req_tx_entries_per_subcrq =
2727                                         adapter->max_tx_entries_per_subcrq;
2728
2729                 if (adapter->desired.rx_entries)
2730                         adapter->req_rx_add_entries_per_subcrq =
2731                                         adapter->desired.rx_entries;
2732                 else
2733                         adapter->req_rx_add_entries_per_subcrq =
2734                                         adapter->max_rx_add_entries_per_subcrq;
2735
2736                 if (adapter->desired.tx_queues)
2737                         adapter->req_tx_queues =
2738                                         adapter->desired.tx_queues;
2739                 else
2740                         adapter->req_tx_queues =
2741                                         adapter->opt_tx_comp_sub_queues;
2742
2743                 if (adapter->desired.rx_queues)
2744                         adapter->req_rx_queues =
2745                                         adapter->desired.rx_queues;
2746                 else
2747                         adapter->req_rx_queues =
2748                                         adapter->opt_rx_comp_queues;
2749
2750                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2751         }
2752
2753         memset(&crq, 0, sizeof(crq));
2754         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2755         crq.request_capability.cmd = REQUEST_CAPABILITY;
2756
2757         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2758         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2759         atomic_inc(&adapter->running_cap_crqs);
2760         ibmvnic_send_crq(adapter, &crq);
2761
2762         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2763         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2764         atomic_inc(&adapter->running_cap_crqs);
2765         ibmvnic_send_crq(adapter, &crq);
2766
2767         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2768         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2769         atomic_inc(&adapter->running_cap_crqs);
2770         ibmvnic_send_crq(adapter, &crq);
2771
2772         crq.request_capability.capability =
2773             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2774         crq.request_capability.number =
2775             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2776         atomic_inc(&adapter->running_cap_crqs);
2777         ibmvnic_send_crq(adapter, &crq);
2778
2779         crq.request_capability.capability =
2780             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2781         crq.request_capability.number =
2782             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2783         atomic_inc(&adapter->running_cap_crqs);
2784         ibmvnic_send_crq(adapter, &crq);
2785
2786         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2787         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2788         atomic_inc(&adapter->running_cap_crqs);
2789         ibmvnic_send_crq(adapter, &crq);
2790
2791         if (adapter->netdev->flags & IFF_PROMISC) {
2792                 if (adapter->promisc_supported) {
2793                         crq.request_capability.capability =
2794                             cpu_to_be16(PROMISC_REQUESTED);
2795                         crq.request_capability.number = cpu_to_be64(1);
2796                         atomic_inc(&adapter->running_cap_crqs);
2797                         ibmvnic_send_crq(adapter, &crq);
2798                 }
2799         } else {
2800                 crq.request_capability.capability =
2801                     cpu_to_be16(PROMISC_REQUESTED);
2802                 crq.request_capability.number = cpu_to_be64(0);
2803                 atomic_inc(&adapter->running_cap_crqs);
2804                 ibmvnic_send_crq(adapter, &crq);
2805         }
2806 }
2807
2808 static int pending_scrq(struct ibmvnic_adapter *adapter,
2809                         struct ibmvnic_sub_crq_queue *scrq)
2810 {
2811         union sub_crq *entry = &scrq->msgs[scrq->cur];
2812
2813         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2814                 return 1;
2815         else
2816                 return 0;
2817 }
2818
2819 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2820                                         struct ibmvnic_sub_crq_queue *scrq)
2821 {
2822         union sub_crq *entry;
2823         unsigned long flags;
2824
2825         spin_lock_irqsave(&scrq->lock, flags);
2826         entry = &scrq->msgs[scrq->cur];
2827         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2828                 if (++scrq->cur == scrq->size)
2829                         scrq->cur = 0;
2830         } else {
2831                 entry = NULL;
2832         }
2833         spin_unlock_irqrestore(&scrq->lock, flags);
2834
2835         return entry;
2836 }
2837
2838 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2839 {
2840         struct ibmvnic_crq_queue *queue = &adapter->crq;
2841         union ibmvnic_crq *crq;
2842
2843         crq = &queue->msgs[queue->cur];
2844         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2845                 if (++queue->cur == queue->size)
2846                         queue->cur = 0;
2847         } else {
2848                 crq = NULL;
2849         }
2850
2851         return crq;
2852 }
2853
2854 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2855                        union sub_crq *sub_crq)
2856 {
2857         unsigned int ua = adapter->vdev->unit_address;
2858         struct device *dev = &adapter->vdev->dev;
2859         u64 *u64_crq = (u64 *)sub_crq;
2860         int rc;
2861
2862         netdev_dbg(adapter->netdev,
2863                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2864                    (unsigned long int)cpu_to_be64(remote_handle),
2865                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2866                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2867                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2868                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2869
2870         /* Make sure the hypervisor sees the complete request */
2871         mb();
2872
2873         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2874                                 cpu_to_be64(remote_handle),
2875                                 cpu_to_be64(u64_crq[0]),
2876                                 cpu_to_be64(u64_crq[1]),
2877                                 cpu_to_be64(u64_crq[2]),
2878                                 cpu_to_be64(u64_crq[3]));
2879
2880         if (rc) {
2881                 if (rc == H_CLOSED)
2882                         dev_warn(dev, "CRQ Queue closed\n");
2883                 dev_err(dev, "Send error (rc=%d)\n", rc);
2884         }
2885
2886         return rc;
2887 }
2888
2889 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2890                                 u64 remote_handle, u64 ioba, u64 num_entries)
2891 {
2892         unsigned int ua = adapter->vdev->unit_address;
2893         struct device *dev = &adapter->vdev->dev;
2894         int rc;
2895
2896         /* Make sure the hypervisor sees the complete request */
2897         mb();
2898         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2899                                 cpu_to_be64(remote_handle),
2900                                 ioba, num_entries);
2901
2902         if (rc) {
2903                 if (rc == H_CLOSED)
2904                         dev_warn(dev, "CRQ Queue closed\n");
2905                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2906         }
2907
2908         return rc;
2909 }
2910
2911 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2912                             union ibmvnic_crq *crq)
2913 {
2914         unsigned int ua = adapter->vdev->unit_address;
2915         struct device *dev = &adapter->vdev->dev;
2916         u64 *u64_crq = (u64 *)crq;
2917         int rc;
2918
2919         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2920                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2921                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2922
2923         /* Make sure the hypervisor sees the complete request */
2924         mb();
2925
2926         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2927                                 cpu_to_be64(u64_crq[0]),
2928                                 cpu_to_be64(u64_crq[1]));
2929
2930         if (rc) {
2931                 if (rc == H_CLOSED) {
2932                         dev_warn(dev, "CRQ Queue closed\n");
2933                         if (adapter->resetting)
2934                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2935                 }
2936
2937                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2938         }
2939
2940         return rc;
2941 }
2942
2943 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2944 {
2945         union ibmvnic_crq crq;
2946
2947         memset(&crq, 0, sizeof(crq));
2948         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2949         crq.generic.cmd = IBMVNIC_CRQ_INIT;
2950         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2951
2952         return ibmvnic_send_crq(adapter, &crq);
2953 }
2954
2955 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2956 {
2957         union ibmvnic_crq crq;
2958
2959         memset(&crq, 0, sizeof(crq));
2960         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2961         crq.version_exchange.cmd = VERSION_EXCHANGE;
2962         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2963
2964         return ibmvnic_send_crq(adapter, &crq);
2965 }
2966
2967 struct vnic_login_client_data {
2968         u8      type;
2969         __be16  len;
2970         char    name;
2971 } __packed;
2972
2973 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
2974 {
2975         int len;
2976
2977         /* Calculate the amount of buffer space needed for the
2978          * vnic client data in the login buffer. There are four entries,
2979          * OS name, LPAR name, device name, and a null last entry.
2980          */
2981         len = 4 * sizeof(struct vnic_login_client_data);
2982         len += 6; /* "Linux" plus NULL */
2983         len += strlen(utsname()->nodename) + 1;
2984         len += strlen(adapter->netdev->name) + 1;
2985
2986         return len;
2987 }
2988
2989 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
2990                                  struct vnic_login_client_data *vlcd)
2991 {
2992         const char *os_name = "Linux";
2993         int len;
2994
2995         /* Type 1 - LPAR OS */
2996         vlcd->type = 1;
2997         len = strlen(os_name) + 1;
2998         vlcd->len = cpu_to_be16(len);
2999         strncpy(&vlcd->name, os_name, len);
3000         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3001
3002         /* Type 2 - LPAR name */
3003         vlcd->type = 2;
3004         len = strlen(utsname()->nodename) + 1;
3005         vlcd->len = cpu_to_be16(len);
3006         strncpy(&vlcd->name, utsname()->nodename, len);
3007         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3008
3009         /* Type 3 - device name */
3010         vlcd->type = 3;
3011         len = strlen(adapter->netdev->name) + 1;
3012         vlcd->len = cpu_to_be16(len);
3013         strncpy(&vlcd->name, adapter->netdev->name, len);
3014 }
3015
3016 static void send_login(struct ibmvnic_adapter *adapter)
3017 {
3018         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3019         struct ibmvnic_login_buffer *login_buffer;
3020         struct device *dev = &adapter->vdev->dev;
3021         dma_addr_t rsp_buffer_token;
3022         dma_addr_t buffer_token;
3023         size_t rsp_buffer_size;
3024         union ibmvnic_crq crq;
3025         size_t buffer_size;
3026         __be64 *tx_list_p;
3027         __be64 *rx_list_p;
3028         int client_data_len;
3029         struct vnic_login_client_data *vlcd;
3030         int i;
3031
3032         release_login_rsp_buffer(adapter);
3033         client_data_len = vnic_client_data_len(adapter);
3034
3035         buffer_size =
3036             sizeof(struct ibmvnic_login_buffer) +
3037             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3038             client_data_len;
3039
3040         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3041         if (!login_buffer)
3042                 goto buf_alloc_failed;
3043
3044         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3045                                       DMA_TO_DEVICE);
3046         if (dma_mapping_error(dev, buffer_token)) {
3047                 dev_err(dev, "Couldn't map login buffer\n");
3048                 goto buf_map_failed;
3049         }
3050
3051         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3052                           sizeof(u64) * adapter->req_tx_queues +
3053                           sizeof(u64) * adapter->req_rx_queues +
3054                           sizeof(u64) * adapter->req_rx_queues +
3055                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3056
3057         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3058         if (!login_rsp_buffer)
3059                 goto buf_rsp_alloc_failed;
3060
3061         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3062                                           rsp_buffer_size, DMA_FROM_DEVICE);
3063         if (dma_mapping_error(dev, rsp_buffer_token)) {
3064                 dev_err(dev, "Couldn't map login rsp buffer\n");
3065                 goto buf_rsp_map_failed;
3066         }
3067
3068         adapter->login_buf = login_buffer;
3069         adapter->login_buf_token = buffer_token;
3070         adapter->login_buf_sz = buffer_size;
3071         adapter->login_rsp_buf = login_rsp_buffer;
3072         adapter->login_rsp_buf_token = rsp_buffer_token;
3073         adapter->login_rsp_buf_sz = rsp_buffer_size;
3074
3075         login_buffer->len = cpu_to_be32(buffer_size);
3076         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3077         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3078         login_buffer->off_txcomp_subcrqs =
3079             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3080         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3081         login_buffer->off_rxcomp_subcrqs =
3082             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3083                         sizeof(u64) * adapter->req_tx_queues);
3084         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3085         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3086
3087         tx_list_p = (__be64 *)((char *)login_buffer +
3088                                       sizeof(struct ibmvnic_login_buffer));
3089         rx_list_p = (__be64 *)((char *)login_buffer +
3090                                       sizeof(struct ibmvnic_login_buffer) +
3091                                       sizeof(u64) * adapter->req_tx_queues);
3092
3093         for (i = 0; i < adapter->req_tx_queues; i++) {
3094                 if (adapter->tx_scrq[i]) {
3095                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3096                                                    crq_num);
3097                 }
3098         }
3099
3100         for (i = 0; i < adapter->req_rx_queues; i++) {
3101                 if (adapter->rx_scrq[i]) {
3102                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3103                                                    crq_num);
3104                 }
3105         }
3106
3107         /* Insert vNIC login client data */
3108         vlcd = (struct vnic_login_client_data *)
3109                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3110         login_buffer->client_data_offset =
3111                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3112         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3113
3114         vnic_add_client_data(adapter, vlcd);
3115
3116         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3117         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3118                 netdev_dbg(adapter->netdev, "%016lx\n",
3119                            ((unsigned long int *)(adapter->login_buf))[i]);
3120         }
3121
3122         memset(&crq, 0, sizeof(crq));
3123         crq.login.first = IBMVNIC_CRQ_CMD;
3124         crq.login.cmd = LOGIN;
3125         crq.login.ioba = cpu_to_be32(buffer_token);
3126         crq.login.len = cpu_to_be32(buffer_size);
3127         ibmvnic_send_crq(adapter, &crq);
3128
3129         return;
3130
3131 buf_rsp_map_failed:
3132         kfree(login_rsp_buffer);
3133 buf_rsp_alloc_failed:
3134         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3135 buf_map_failed:
3136         kfree(login_buffer);
3137 buf_alloc_failed:
3138         return;
3139 }
3140
3141 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3142                              u32 len, u8 map_id)
3143 {
3144         union ibmvnic_crq crq;
3145
3146         memset(&crq, 0, sizeof(crq));
3147         crq.request_map.first = IBMVNIC_CRQ_CMD;
3148         crq.request_map.cmd = REQUEST_MAP;
3149         crq.request_map.map_id = map_id;
3150         crq.request_map.ioba = cpu_to_be32(addr);
3151         crq.request_map.len = cpu_to_be32(len);
3152         ibmvnic_send_crq(adapter, &crq);
3153 }
3154
3155 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3156 {
3157         union ibmvnic_crq crq;
3158
3159         memset(&crq, 0, sizeof(crq));
3160         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3161         crq.request_unmap.cmd = REQUEST_UNMAP;
3162         crq.request_unmap.map_id = map_id;
3163         ibmvnic_send_crq(adapter, &crq);
3164 }
3165
3166 static void send_map_query(struct ibmvnic_adapter *adapter)
3167 {
3168         union ibmvnic_crq crq;
3169
3170         memset(&crq, 0, sizeof(crq));
3171         crq.query_map.first = IBMVNIC_CRQ_CMD;
3172         crq.query_map.cmd = QUERY_MAP;
3173         ibmvnic_send_crq(adapter, &crq);
3174 }
3175
3176 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3177 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3178 {
3179         union ibmvnic_crq crq;
3180
3181         atomic_set(&adapter->running_cap_crqs, 0);
3182         memset(&crq, 0, sizeof(crq));
3183         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3184         crq.query_capability.cmd = QUERY_CAPABILITY;
3185
3186         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3187         atomic_inc(&adapter->running_cap_crqs);
3188         ibmvnic_send_crq(adapter, &crq);
3189
3190         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3191         atomic_inc(&adapter->running_cap_crqs);
3192         ibmvnic_send_crq(adapter, &crq);
3193
3194         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3195         atomic_inc(&adapter->running_cap_crqs);
3196         ibmvnic_send_crq(adapter, &crq);
3197
3198         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3199         atomic_inc(&adapter->running_cap_crqs);
3200         ibmvnic_send_crq(adapter, &crq);
3201
3202         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3203         atomic_inc(&adapter->running_cap_crqs);
3204         ibmvnic_send_crq(adapter, &crq);
3205
3206         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3207         atomic_inc(&adapter->running_cap_crqs);
3208         ibmvnic_send_crq(adapter, &crq);
3209
3210         crq.query_capability.capability =
3211             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3212         atomic_inc(&adapter->running_cap_crqs);
3213         ibmvnic_send_crq(adapter, &crq);
3214
3215         crq.query_capability.capability =
3216             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3217         atomic_inc(&adapter->running_cap_crqs);
3218         ibmvnic_send_crq(adapter, &crq);
3219
3220         crq.query_capability.capability =
3221             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3222         atomic_inc(&adapter->running_cap_crqs);
3223         ibmvnic_send_crq(adapter, &crq);
3224
3225         crq.query_capability.capability =
3226             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3227         atomic_inc(&adapter->running_cap_crqs);
3228         ibmvnic_send_crq(adapter, &crq);
3229
3230         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3231         atomic_inc(&adapter->running_cap_crqs);
3232         ibmvnic_send_crq(adapter, &crq);
3233
3234         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3235         atomic_inc(&adapter->running_cap_crqs);
3236         ibmvnic_send_crq(adapter, &crq);
3237
3238         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3239         atomic_inc(&adapter->running_cap_crqs);
3240         ibmvnic_send_crq(adapter, &crq);
3241
3242         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3243         atomic_inc(&adapter->running_cap_crqs);
3244         ibmvnic_send_crq(adapter, &crq);
3245
3246         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3247         atomic_inc(&adapter->running_cap_crqs);
3248         ibmvnic_send_crq(adapter, &crq);
3249
3250         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3251         atomic_inc(&adapter->running_cap_crqs);
3252         ibmvnic_send_crq(adapter, &crq);
3253
3254         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3255         atomic_inc(&adapter->running_cap_crqs);
3256         ibmvnic_send_crq(adapter, &crq);
3257
3258         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3259         atomic_inc(&adapter->running_cap_crqs);
3260         ibmvnic_send_crq(adapter, &crq);
3261
3262         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3263         atomic_inc(&adapter->running_cap_crqs);
3264         ibmvnic_send_crq(adapter, &crq);
3265
3266         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3267         atomic_inc(&adapter->running_cap_crqs);
3268         ibmvnic_send_crq(adapter, &crq);
3269
3270         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3271         atomic_inc(&adapter->running_cap_crqs);
3272         ibmvnic_send_crq(adapter, &crq);
3273
3274         crq.query_capability.capability =
3275                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3276         atomic_inc(&adapter->running_cap_crqs);
3277         ibmvnic_send_crq(adapter, &crq);
3278
3279         crq.query_capability.capability =
3280                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3281         atomic_inc(&adapter->running_cap_crqs);
3282         ibmvnic_send_crq(adapter, &crq);
3283
3284         crq.query_capability.capability =
3285                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3286         atomic_inc(&adapter->running_cap_crqs);
3287         ibmvnic_send_crq(adapter, &crq);
3288
3289         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3290         atomic_inc(&adapter->running_cap_crqs);
3291         ibmvnic_send_crq(adapter, &crq);
3292 }
3293
3294 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3295                                 struct ibmvnic_adapter *adapter)
3296 {
3297         struct device *dev = &adapter->vdev->dev;
3298
3299         if (crq->get_vpd_size_rsp.rc.code) {
3300                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3301                         crq->get_vpd_size_rsp.rc.code);
3302                 complete(&adapter->fw_done);
3303                 return;
3304         }
3305
3306         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3307         complete(&adapter->fw_done);
3308 }
3309
3310 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3311                            struct ibmvnic_adapter *adapter)
3312 {
3313         struct device *dev = &adapter->vdev->dev;
3314         unsigned char *substr = NULL;
3315         u8 fw_level_len = 0;
3316
3317         memset(adapter->fw_version, 0, 32);
3318
3319         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3320                          DMA_FROM_DEVICE);
3321
3322         if (crq->get_vpd_rsp.rc.code) {
3323                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3324                         crq->get_vpd_rsp.rc.code);
3325                 goto complete;
3326         }
3327
3328         /* get the position of the firmware version info
3329          * located after the ASCII 'RM' substring in the buffer
3330          */
3331         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3332         if (!substr) {
3333                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3334                 goto complete;
3335         }
3336
3337         /* get length of firmware level ASCII substring */
3338         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3339                 fw_level_len = *(substr + 2);
3340         } else {
3341                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3342                 goto complete;
3343         }
3344
3345         /* copy firmware version string from vpd into adapter */
3346         if ((substr + 3 + fw_level_len) <
3347             (adapter->vpd->buff + adapter->vpd->len)) {
3348                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3349         } else {
3350                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3351         }
3352
3353 complete:
3354         if (adapter->fw_version[0] == '\0')
3355                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3356         complete(&adapter->fw_done);
3357 }
3358
3359 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3360 {
3361         struct device *dev = &adapter->vdev->dev;
3362         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3363         union ibmvnic_crq crq;
3364         int i;
3365
3366         dma_unmap_single(dev, adapter->ip_offload_tok,
3367                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3368
3369         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3370         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3371                 netdev_dbg(adapter->netdev, "%016lx\n",
3372                            ((unsigned long int *)(buf))[i]);
3373
3374         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3375         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3376         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3377                    buf->tcp_ipv4_chksum);
3378         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3379                    buf->tcp_ipv6_chksum);
3380         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3381                    buf->udp_ipv4_chksum);
3382         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3383                    buf->udp_ipv6_chksum);
3384         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3385                    buf->large_tx_ipv4);
3386         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3387                    buf->large_tx_ipv6);
3388         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3389                    buf->large_rx_ipv4);
3390         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3391                    buf->large_rx_ipv6);
3392         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3393                    buf->max_ipv4_header_size);
3394         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3395                    buf->max_ipv6_header_size);
3396         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3397                    buf->max_tcp_header_size);
3398         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3399                    buf->max_udp_header_size);
3400         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3401                    buf->max_large_tx_size);
3402         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3403                    buf->max_large_rx_size);
3404         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3405                    buf->ipv6_extension_header);
3406         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3407                    buf->tcp_pseudosum_req);
3408         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3409                    buf->num_ipv6_ext_headers);
3410         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3411                    buf->off_ipv6_ext_headers);
3412
3413         adapter->ip_offload_ctrl_tok =
3414             dma_map_single(dev, &adapter->ip_offload_ctrl,
3415                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3416
3417         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3418                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3419                 return;
3420         }
3421
3422         adapter->ip_offload_ctrl.len =
3423             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3424         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3425         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3426         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3427         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3428         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3429         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3430         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3431         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3432         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3433
3434         /* large_rx disabled for now, additional features needed */
3435         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3436         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3437
3438         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3439
3440         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3441                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3442
3443         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3444                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3445
3446         if ((adapter->netdev->features &
3447             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3448                 adapter->netdev->features |= NETIF_F_RXCSUM;
3449
3450         if (buf->large_tx_ipv4)
3451                 adapter->netdev->features |= NETIF_F_TSO;
3452         if (buf->large_tx_ipv6)
3453                 adapter->netdev->features |= NETIF_F_TSO6;
3454
3455         adapter->netdev->hw_features |= adapter->netdev->features;
3456
3457         memset(&crq, 0, sizeof(crq));
3458         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3459         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3460         crq.control_ip_offload.len =
3461             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3462         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3463         ibmvnic_send_crq(adapter, &crq);
3464 }
3465
3466 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3467                                   struct ibmvnic_adapter *adapter)
3468 {
3469         struct device *dev = &adapter->vdev->dev;
3470         struct ibmvnic_error_buff *error_buff, *tmp;
3471         unsigned long flags;
3472         bool found = false;
3473         int i;
3474
3475         if (!crq->request_error_rsp.rc.code) {
3476                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3477                          crq->request_error_rsp.rc.code);
3478                 return;
3479         }
3480
3481         spin_lock_irqsave(&adapter->error_list_lock, flags);
3482         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3483                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3484                         found = true;
3485                         list_del(&error_buff->list);
3486                         break;
3487                 }
3488         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3489
3490         if (!found) {
3491                 dev_err(dev, "Couldn't find error id %x\n",
3492                         be32_to_cpu(crq->request_error_rsp.error_id));
3493                 return;
3494         }
3495
3496         dev_err(dev, "Detailed info for error id %x:",
3497                 be32_to_cpu(crq->request_error_rsp.error_id));
3498
3499         for (i = 0; i < error_buff->len; i++) {
3500                 pr_cont("%02x", (int)error_buff->buff[i]);
3501                 if (i % 8 == 7)
3502                         pr_cont(" ");
3503         }
3504         pr_cont("\n");
3505
3506         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3507                          DMA_FROM_DEVICE);
3508         kfree(error_buff->buff);
3509         kfree(error_buff);
3510 }
3511
3512 static void request_error_information(struct ibmvnic_adapter *adapter,
3513                                       union ibmvnic_crq *err_crq)
3514 {
3515         struct device *dev = &adapter->vdev->dev;
3516         struct net_device *netdev = adapter->netdev;
3517         struct ibmvnic_error_buff *error_buff;
3518         unsigned long timeout = msecs_to_jiffies(30000);
3519         union ibmvnic_crq crq;
3520         unsigned long flags;
3521         int rc, detail_len;
3522
3523         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3524         if (!error_buff)
3525                 return;
3526
3527         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3528         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3529         if (!error_buff->buff) {
3530                 kfree(error_buff);
3531                 return;
3532         }
3533
3534         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3535                                          DMA_FROM_DEVICE);
3536         if (dma_mapping_error(dev, error_buff->dma)) {
3537                 netdev_err(netdev, "Couldn't map error buffer\n");
3538                 kfree(error_buff->buff);
3539                 kfree(error_buff);
3540                 return;
3541         }
3542
3543         error_buff->len = detail_len;
3544         error_buff->error_id = err_crq->error_indication.error_id;
3545
3546         spin_lock_irqsave(&adapter->error_list_lock, flags);
3547         list_add_tail(&error_buff->list, &adapter->errors);
3548         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3549
3550         memset(&crq, 0, sizeof(crq));
3551         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3552         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3553         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3554         crq.request_error_info.len = cpu_to_be32(detail_len);
3555         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3556
3557         rc = ibmvnic_send_crq(adapter, &crq);
3558         if (rc) {
3559                 netdev_err(netdev, "failed to request error information\n");
3560                 goto err_info_fail;
3561         }
3562
3563         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3564                 netdev_err(netdev, "timeout waiting for error information\n");
3565                 goto err_info_fail;
3566         }
3567
3568         return;
3569
3570 err_info_fail:
3571         spin_lock_irqsave(&adapter->error_list_lock, flags);
3572         list_del(&error_buff->list);
3573         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3574
3575         kfree(error_buff->buff);
3576         kfree(error_buff);
3577 }
3578
3579 static void handle_error_indication(union ibmvnic_crq *crq,
3580                                     struct ibmvnic_adapter *adapter)
3581 {
3582         struct device *dev = &adapter->vdev->dev;
3583
3584         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3585                 crq->error_indication.flags
3586                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3587                 be32_to_cpu(crq->error_indication.error_id),
3588                 be16_to_cpu(crq->error_indication.error_cause));
3589
3590         if (be32_to_cpu(crq->error_indication.error_id))
3591                 request_error_information(adapter, crq);
3592
3593         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3594                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3595         else
3596                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3597 }
3598
3599 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3600                                  struct ibmvnic_adapter *adapter)
3601 {
3602         struct net_device *netdev = adapter->netdev;
3603         struct device *dev = &adapter->vdev->dev;
3604         long rc;
3605
3606         rc = crq->change_mac_addr_rsp.rc.code;
3607         if (rc) {
3608                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3609                 goto out;
3610         }
3611         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3612                ETH_ALEN);
3613 out:
3614         complete(&adapter->fw_done);
3615         return rc;
3616 }
3617
3618 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3619                                    struct ibmvnic_adapter *adapter)
3620 {
3621         struct device *dev = &adapter->vdev->dev;
3622         u64 *req_value;
3623         char *name;
3624
3625         atomic_dec(&adapter->running_cap_crqs);
3626         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3627         case REQ_TX_QUEUES:
3628                 req_value = &adapter->req_tx_queues;
3629                 name = "tx";
3630                 break;
3631         case REQ_RX_QUEUES:
3632                 req_value = &adapter->req_rx_queues;
3633                 name = "rx";
3634                 break;
3635         case REQ_RX_ADD_QUEUES:
3636                 req_value = &adapter->req_rx_add_queues;
3637                 name = "rx_add";
3638                 break;
3639         case REQ_TX_ENTRIES_PER_SUBCRQ:
3640                 req_value = &adapter->req_tx_entries_per_subcrq;
3641                 name = "tx_entries_per_subcrq";
3642                 break;
3643         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3644                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3645                 name = "rx_add_entries_per_subcrq";
3646                 break;
3647         case REQ_MTU:
3648                 req_value = &adapter->req_mtu;
3649                 name = "mtu";
3650                 break;
3651         case PROMISC_REQUESTED:
3652                 req_value = &adapter->promisc;
3653                 name = "promisc";
3654                 break;
3655         default:
3656                 dev_err(dev, "Got invalid cap request rsp %d\n",
3657                         crq->request_capability.capability);
3658                 return;
3659         }
3660
3661         switch (crq->request_capability_rsp.rc.code) {
3662         case SUCCESS:
3663                 break;
3664         case PARTIALSUCCESS:
3665                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3666                          *req_value,
3667                          (long int)be64_to_cpu(crq->request_capability_rsp.
3668                                                number), name);
3669
3670                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3671                     REQ_MTU) {
3672                         pr_err("mtu of %llu is not supported. Reverting.\n",
3673                                *req_value);
3674                         *req_value = adapter->fallback.mtu;
3675                 } else {
3676                         *req_value =
3677                                 be64_to_cpu(crq->request_capability_rsp.number);
3678                 }
3679
3680                 ibmvnic_send_req_caps(adapter, 1);
3681                 return;
3682         default:
3683                 dev_err(dev, "Error %d in request cap rsp\n",
3684                         crq->request_capability_rsp.rc.code);
3685                 return;
3686         }
3687
3688         /* Done receiving requested capabilities, query IP offload support */
3689         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3690                 union ibmvnic_crq newcrq;
3691                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3692                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3693                     &adapter->ip_offload_buf;
3694
3695                 adapter->wait_capability = false;
3696                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3697                                                          buf_sz,
3698                                                          DMA_FROM_DEVICE);
3699
3700                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3701                         if (!firmware_has_feature(FW_FEATURE_CMO))
3702                                 dev_err(dev, "Couldn't map offload buffer\n");
3703                         return;
3704                 }
3705
3706                 memset(&newcrq, 0, sizeof(newcrq));
3707                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3708                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3709                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3710                 newcrq.query_ip_offload.ioba =
3711                     cpu_to_be32(adapter->ip_offload_tok);
3712
3713                 ibmvnic_send_crq(adapter, &newcrq);
3714         }
3715 }
3716
3717 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3718                             struct ibmvnic_adapter *adapter)
3719 {
3720         struct device *dev = &adapter->vdev->dev;
3721         struct net_device *netdev = adapter->netdev;
3722         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3723         struct ibmvnic_login_buffer *login = adapter->login_buf;
3724         int i;
3725
3726         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3727                          DMA_BIDIRECTIONAL);
3728         release_login_buffer(adapter);
3729         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3730                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3731
3732         /* If the number of queues requested can't be allocated by the
3733          * server, the login response will return with code 1. We will need
3734          * to resend the login buffer with fewer queues requested.
3735          */
3736         if (login_rsp_crq->generic.rc.code) {
3737                 adapter->renegotiate = true;
3738                 complete(&adapter->init_done);
3739                 return 0;
3740         }
3741
3742         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3743
3744         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3745         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3746                 netdev_dbg(adapter->netdev, "%016lx\n",
3747                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3748         }
3749
3750         /* Sanity checks */
3751         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3752             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3753              adapter->req_rx_add_queues !=
3754              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3755                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3756                 ibmvnic_remove(adapter->vdev);
3757                 return -EIO;
3758         }
3759         complete(&adapter->init_done);
3760
3761         return 0;
3762 }
3763
3764 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3765                                      struct ibmvnic_adapter *adapter)
3766 {
3767         struct device *dev = &adapter->vdev->dev;
3768         long rc;
3769
3770         rc = crq->request_unmap_rsp.rc.code;
3771         if (rc)
3772                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3773 }
3774
3775 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3776                                  struct ibmvnic_adapter *adapter)
3777 {
3778         struct net_device *netdev = adapter->netdev;
3779         struct device *dev = &adapter->vdev->dev;
3780         long rc;
3781
3782         rc = crq->query_map_rsp.rc.code;
3783         if (rc) {
3784                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3785                 return;
3786         }
3787         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3788                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3789                    crq->query_map_rsp.free_pages);
3790 }
3791
3792 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3793                                  struct ibmvnic_adapter *adapter)
3794 {
3795         struct net_device *netdev = adapter->netdev;
3796         struct device *dev = &adapter->vdev->dev;
3797         long rc;
3798
3799         atomic_dec(&adapter->running_cap_crqs);
3800         netdev_dbg(netdev, "Outstanding queries: %d\n",
3801                    atomic_read(&adapter->running_cap_crqs));
3802         rc = crq->query_capability.rc.code;
3803         if (rc) {
3804                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3805                 goto out;
3806         }
3807
3808         switch (be16_to_cpu(crq->query_capability.capability)) {
3809         case MIN_TX_QUEUES:
3810                 adapter->min_tx_queues =
3811                     be64_to_cpu(crq->query_capability.number);
3812                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3813                            adapter->min_tx_queues);
3814                 break;
3815         case MIN_RX_QUEUES:
3816                 adapter->min_rx_queues =
3817                     be64_to_cpu(crq->query_capability.number);
3818                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3819                            adapter->min_rx_queues);
3820                 break;
3821         case MIN_RX_ADD_QUEUES:
3822                 adapter->min_rx_add_queues =
3823                     be64_to_cpu(crq->query_capability.number);
3824                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3825                            adapter->min_rx_add_queues);
3826                 break;
3827         case MAX_TX_QUEUES:
3828                 adapter->max_tx_queues =
3829                     be64_to_cpu(crq->query_capability.number);
3830                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3831                            adapter->max_tx_queues);
3832                 break;
3833         case MAX_RX_QUEUES:
3834                 adapter->max_rx_queues =
3835                     be64_to_cpu(crq->query_capability.number);
3836                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3837                            adapter->max_rx_queues);
3838                 break;
3839         case MAX_RX_ADD_QUEUES:
3840                 adapter->max_rx_add_queues =
3841                     be64_to_cpu(crq->query_capability.number);
3842                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3843                            adapter->max_rx_add_queues);
3844                 break;
3845         case MIN_TX_ENTRIES_PER_SUBCRQ:
3846                 adapter->min_tx_entries_per_subcrq =
3847                     be64_to_cpu(crq->query_capability.number);
3848                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3849                            adapter->min_tx_entries_per_subcrq);
3850                 break;
3851         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3852                 adapter->min_rx_add_entries_per_subcrq =
3853                     be64_to_cpu(crq->query_capability.number);
3854                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3855                            adapter->min_rx_add_entries_per_subcrq);
3856                 break;
3857         case MAX_TX_ENTRIES_PER_SUBCRQ:
3858                 adapter->max_tx_entries_per_subcrq =
3859                     be64_to_cpu(crq->query_capability.number);
3860                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3861                            adapter->max_tx_entries_per_subcrq);
3862                 break;
3863         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3864                 adapter->max_rx_add_entries_per_subcrq =
3865                     be64_to_cpu(crq->query_capability.number);
3866                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3867                            adapter->max_rx_add_entries_per_subcrq);
3868                 break;
3869         case TCP_IP_OFFLOAD:
3870                 adapter->tcp_ip_offload =
3871                     be64_to_cpu(crq->query_capability.number);
3872                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3873                            adapter->tcp_ip_offload);
3874                 break;
3875         case PROMISC_SUPPORTED:
3876                 adapter->promisc_supported =
3877                     be64_to_cpu(crq->query_capability.number);
3878                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3879                            adapter->promisc_supported);
3880                 break;
3881         case MIN_MTU:
3882                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3883                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3884                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3885                 break;
3886         case MAX_MTU:
3887                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3888                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3889                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3890                 break;
3891         case MAX_MULTICAST_FILTERS:
3892                 adapter->max_multicast_filters =
3893                     be64_to_cpu(crq->query_capability.number);
3894                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3895                            adapter->max_multicast_filters);
3896                 break;
3897         case VLAN_HEADER_INSERTION:
3898                 adapter->vlan_header_insertion =
3899                     be64_to_cpu(crq->query_capability.number);
3900                 if (adapter->vlan_header_insertion)
3901                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3902                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3903                            adapter->vlan_header_insertion);
3904                 break;
3905         case RX_VLAN_HEADER_INSERTION:
3906                 adapter->rx_vlan_header_insertion =
3907                     be64_to_cpu(crq->query_capability.number);
3908                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3909                            adapter->rx_vlan_header_insertion);
3910                 break;
3911         case MAX_TX_SG_ENTRIES:
3912                 adapter->max_tx_sg_entries =
3913                     be64_to_cpu(crq->query_capability.number);
3914                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3915                            adapter->max_tx_sg_entries);
3916                 break;
3917         case RX_SG_SUPPORTED:
3918                 adapter->rx_sg_supported =
3919                     be64_to_cpu(crq->query_capability.number);
3920                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3921                            adapter->rx_sg_supported);
3922                 break;
3923         case OPT_TX_COMP_SUB_QUEUES:
3924                 adapter->opt_tx_comp_sub_queues =
3925                     be64_to_cpu(crq->query_capability.number);
3926                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3927                            adapter->opt_tx_comp_sub_queues);
3928                 break;
3929         case OPT_RX_COMP_QUEUES:
3930                 adapter->opt_rx_comp_queues =
3931                     be64_to_cpu(crq->query_capability.number);
3932                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3933                            adapter->opt_rx_comp_queues);
3934                 break;
3935         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3936                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3937                     be64_to_cpu(crq->query_capability.number);
3938                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3939                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3940                 break;
3941         case OPT_TX_ENTRIES_PER_SUBCRQ:
3942                 adapter->opt_tx_entries_per_subcrq =
3943                     be64_to_cpu(crq->query_capability.number);
3944                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3945                            adapter->opt_tx_entries_per_subcrq);
3946                 break;
3947         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3948                 adapter->opt_rxba_entries_per_subcrq =
3949                     be64_to_cpu(crq->query_capability.number);
3950                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3951                            adapter->opt_rxba_entries_per_subcrq);
3952                 break;
3953         case TX_RX_DESC_REQ:
3954                 adapter->tx_rx_desc_req = crq->query_capability.number;
3955                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3956                            adapter->tx_rx_desc_req);
3957                 break;
3958
3959         default:
3960                 netdev_err(netdev, "Got invalid cap rsp %d\n",
3961                            crq->query_capability.capability);
3962         }
3963
3964 out:
3965         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3966                 adapter->wait_capability = false;
3967                 ibmvnic_send_req_caps(adapter, 0);
3968         }
3969 }
3970
3971 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3972                                struct ibmvnic_adapter *adapter)
3973 {
3974         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3975         struct net_device *netdev = adapter->netdev;
3976         struct device *dev = &adapter->vdev->dev;
3977         u64 *u64_crq = (u64 *)crq;
3978         long rc;
3979
3980         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3981                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3982                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3983         switch (gen_crq->first) {
3984         case IBMVNIC_CRQ_INIT_RSP:
3985                 switch (gen_crq->cmd) {
3986                 case IBMVNIC_CRQ_INIT:
3987                         dev_info(dev, "Partner initialized\n");
3988                         adapter->from_passive_init = true;
3989                         complete(&adapter->init_done);
3990                         break;
3991                 case IBMVNIC_CRQ_INIT_COMPLETE:
3992                         dev_info(dev, "Partner initialization complete\n");
3993                         send_version_xchg(adapter);
3994                         break;
3995                 default:
3996                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3997                 }
3998                 return;
3999         case IBMVNIC_CRQ_XPORT_EVENT:
4000                 netif_carrier_off(netdev);
4001                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4002                         dev_info(dev, "Migrated, re-enabling adapter\n");
4003                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4004                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4005                         dev_info(dev, "Backing device failover detected\n");
4006                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4007                 } else {
4008                         /* The adapter lost the connection */
4009                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4010                                 gen_crq->cmd);
4011                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4012                 }
4013                 return;
4014         case IBMVNIC_CRQ_CMD_RSP:
4015                 break;
4016         default:
4017                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4018                         gen_crq->first);
4019                 return;
4020         }
4021
4022         switch (gen_crq->cmd) {
4023         case VERSION_EXCHANGE_RSP:
4024                 rc = crq->version_exchange_rsp.rc.code;
4025                 if (rc) {
4026                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4027                         break;
4028                 }
4029                 dev_info(dev, "Partner protocol version is %d\n",
4030                          crq->version_exchange_rsp.version);
4031                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4032                     ibmvnic_version)
4033                         ibmvnic_version =
4034                             be16_to_cpu(crq->version_exchange_rsp.version);
4035                 send_cap_queries(adapter);
4036                 break;
4037         case QUERY_CAPABILITY_RSP:
4038                 handle_query_cap_rsp(crq, adapter);
4039                 break;
4040         case QUERY_MAP_RSP:
4041                 handle_query_map_rsp(crq, adapter);
4042                 break;
4043         case REQUEST_MAP_RSP:
4044                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4045                 complete(&adapter->fw_done);
4046                 break;
4047         case REQUEST_UNMAP_RSP:
4048                 handle_request_unmap_rsp(crq, adapter);
4049                 break;
4050         case REQUEST_CAPABILITY_RSP:
4051                 handle_request_cap_rsp(crq, adapter);
4052                 break;
4053         case LOGIN_RSP:
4054                 netdev_dbg(netdev, "Got Login Response\n");
4055                 handle_login_rsp(crq, adapter);
4056                 break;
4057         case LOGICAL_LINK_STATE_RSP:
4058                 netdev_dbg(netdev,
4059                            "Got Logical Link State Response, state: %d rc: %d\n",
4060                            crq->logical_link_state_rsp.link_state,
4061                            crq->logical_link_state_rsp.rc.code);
4062                 adapter->logical_link_state =
4063                     crq->logical_link_state_rsp.link_state;
4064                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4065                 complete(&adapter->init_done);
4066                 break;
4067         case LINK_STATE_INDICATION:
4068                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4069                 adapter->phys_link_state =
4070                     crq->link_state_indication.phys_link_state;
4071                 adapter->logical_link_state =
4072                     crq->link_state_indication.logical_link_state;
4073                 break;
4074         case CHANGE_MAC_ADDR_RSP:
4075                 netdev_dbg(netdev, "Got MAC address change Response\n");
4076                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4077                 break;
4078         case ERROR_INDICATION:
4079                 netdev_dbg(netdev, "Got Error Indication\n");
4080                 handle_error_indication(crq, adapter);
4081                 break;
4082         case REQUEST_ERROR_RSP:
4083                 netdev_dbg(netdev, "Got Error Detail Response\n");
4084                 handle_error_info_rsp(crq, adapter);
4085                 break;
4086         case REQUEST_STATISTICS_RSP:
4087                 netdev_dbg(netdev, "Got Statistics Response\n");
4088                 complete(&adapter->stats_done);
4089                 break;
4090         case QUERY_IP_OFFLOAD_RSP:
4091                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4092                 handle_query_ip_offload_rsp(adapter);
4093                 break;
4094         case MULTICAST_CTRL_RSP:
4095                 netdev_dbg(netdev, "Got multicast control Response\n");
4096                 break;
4097         case CONTROL_IP_OFFLOAD_RSP:
4098                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4099                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4100                                  sizeof(adapter->ip_offload_ctrl),
4101                                  DMA_TO_DEVICE);
4102                 complete(&adapter->init_done);
4103                 break;
4104         case COLLECT_FW_TRACE_RSP:
4105                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4106                 complete(&adapter->fw_done);
4107                 break;
4108         case GET_VPD_SIZE_RSP:
4109                 handle_vpd_size_rsp(crq, adapter);
4110                 break;
4111         case GET_VPD_RSP:
4112                 handle_vpd_rsp(crq, adapter);
4113                 break;
4114         default:
4115                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4116                            gen_crq->cmd);
4117         }
4118 }
4119
4120 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4121 {
4122         struct ibmvnic_adapter *adapter = instance;
4123
4124         tasklet_schedule(&adapter->tasklet);
4125         return IRQ_HANDLED;
4126 }
4127
4128 static void ibmvnic_tasklet(void *data)
4129 {
4130         struct ibmvnic_adapter *adapter = data;
4131         struct ibmvnic_crq_queue *queue = &adapter->crq;
4132         union ibmvnic_crq *crq;
4133         unsigned long flags;
4134         bool done = false;
4135
4136         spin_lock_irqsave(&queue->lock, flags);
4137         while (!done) {
4138                 /* Pull all the valid messages off the CRQ */
4139                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4140                         ibmvnic_handle_crq(crq, adapter);
4141                         crq->generic.first = 0;
4142                 }
4143
4144                 /* remain in tasklet until all
4145                  * capabilities responses are received
4146                  */
4147                 if (!adapter->wait_capability)
4148                         done = true;
4149         }
4150         /* if capabilities CRQ's were sent in this tasklet, the following
4151          * tasklet must wait until all responses are received
4152          */
4153         if (atomic_read(&adapter->running_cap_crqs) != 0)
4154                 adapter->wait_capability = true;
4155         spin_unlock_irqrestore(&queue->lock, flags);
4156 }
4157
4158 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4159 {
4160         struct vio_dev *vdev = adapter->vdev;
4161         int rc;
4162
4163         do {
4164                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4165         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4166
4167         if (rc)
4168                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4169
4170         return rc;
4171 }
4172
4173 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4174 {
4175         struct ibmvnic_crq_queue *crq = &adapter->crq;
4176         struct device *dev = &adapter->vdev->dev;
4177         struct vio_dev *vdev = adapter->vdev;
4178         int rc;
4179
4180         /* Close the CRQ */
4181         do {
4182                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4183         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4184
4185         /* Clean out the queue */
4186         memset(crq->msgs, 0, PAGE_SIZE);
4187         crq->cur = 0;
4188
4189         /* And re-open it again */
4190         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4191                                 crq->msg_token, PAGE_SIZE);
4192
4193         if (rc == H_CLOSED)
4194                 /* Adapter is good, but other end is not ready */
4195                 dev_warn(dev, "Partner adapter not ready\n");
4196         else if (rc != 0)
4197                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4198
4199         return rc;
4200 }
4201
4202 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4203 {
4204         struct ibmvnic_crq_queue *crq = &adapter->crq;
4205         struct vio_dev *vdev = adapter->vdev;
4206         long rc;
4207
4208         if (!crq->msgs)
4209                 return;
4210
4211         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4212         free_irq(vdev->irq, adapter);
4213         tasklet_kill(&adapter->tasklet);
4214         do {
4215                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4216         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4217
4218         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4219                          DMA_BIDIRECTIONAL);
4220         free_page((unsigned long)crq->msgs);
4221         crq->msgs = NULL;
4222 }
4223
4224 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4225 {
4226         struct ibmvnic_crq_queue *crq = &adapter->crq;
4227         struct device *dev = &adapter->vdev->dev;
4228         struct vio_dev *vdev = adapter->vdev;
4229         int rc, retrc = -ENOMEM;
4230
4231         if (crq->msgs)
4232                 return 0;
4233
4234         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4235         /* Should we allocate more than one page? */
4236
4237         if (!crq->msgs)
4238                 return -ENOMEM;
4239
4240         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4241         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4242                                         DMA_BIDIRECTIONAL);
4243         if (dma_mapping_error(dev, crq->msg_token))
4244                 goto map_failed;
4245
4246         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4247                                 crq->msg_token, PAGE_SIZE);
4248
4249         if (rc == H_RESOURCE)
4250                 /* maybe kexecing and resource is busy. try a reset */
4251                 rc = ibmvnic_reset_crq(adapter);
4252         retrc = rc;
4253
4254         if (rc == H_CLOSED) {
4255                 dev_warn(dev, "Partner adapter not ready\n");
4256         } else if (rc) {
4257                 dev_warn(dev, "Error %d opening adapter\n", rc);
4258                 goto reg_crq_failed;
4259         }
4260
4261         retrc = 0;
4262
4263         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4264                      (unsigned long)adapter);
4265
4266         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4267         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4268                          adapter);
4269         if (rc) {
4270                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4271                         vdev->irq, rc);
4272                 goto req_irq_failed;
4273         }
4274
4275         rc = vio_enable_interrupts(vdev);
4276         if (rc) {
4277                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4278                 goto req_irq_failed;
4279         }
4280
4281         crq->cur = 0;
4282         spin_lock_init(&crq->lock);
4283
4284         return retrc;
4285
4286 req_irq_failed:
4287         tasklet_kill(&adapter->tasklet);
4288         do {
4289                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4290         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4291 reg_crq_failed:
4292         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4293 map_failed:
4294         free_page((unsigned long)crq->msgs);
4295         crq->msgs = NULL;
4296         return retrc;
4297 }
4298
4299 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4300 {
4301         struct device *dev = &adapter->vdev->dev;
4302         unsigned long timeout = msecs_to_jiffies(30000);
4303         int rc;
4304
4305         if (adapter->resetting && !adapter->wait_for_reset) {
4306                 rc = ibmvnic_reset_crq(adapter);
4307                 if (!rc)
4308                         rc = vio_enable_interrupts(adapter->vdev);
4309         } else {
4310                 rc = init_crq_queue(adapter);
4311         }
4312
4313         if (rc) {
4314                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4315                 return rc;
4316         }
4317
4318         adapter->from_passive_init = false;
4319
4320         init_completion(&adapter->init_done);
4321         adapter->init_done_rc = 0;
4322         ibmvnic_send_crq_init(adapter);
4323         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4324                 dev_err(dev, "Initialization sequence timed out\n");
4325                 return -1;
4326         }
4327
4328         if (adapter->init_done_rc) {
4329                 release_crq_queue(adapter);
4330                 return adapter->init_done_rc;
4331         }
4332
4333         if (adapter->from_passive_init) {
4334                 adapter->state = VNIC_OPEN;
4335                 adapter->from_passive_init = false;
4336                 return -1;
4337         }
4338
4339         if (adapter->resetting && !adapter->wait_for_reset)
4340                 rc = reset_sub_crq_queues(adapter);
4341         else
4342                 rc = init_sub_crqs(adapter);
4343         if (rc) {
4344                 dev_err(dev, "Initialization of sub crqs failed\n");
4345                 release_crq_queue(adapter);
4346                 return rc;
4347         }
4348
4349         rc = init_sub_crq_irqs(adapter);
4350         if (rc) {
4351                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4352                 release_crq_queue(adapter);
4353         }
4354
4355         return rc;
4356 }
4357
4358 static struct device_attribute dev_attr_failover;
4359
4360 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4361 {
4362         struct ibmvnic_adapter *adapter;
4363         struct net_device *netdev;
4364         unsigned char *mac_addr_p;
4365         int rc;
4366
4367         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4368                 dev->unit_address);
4369
4370         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4371                                                         VETH_MAC_ADDR, NULL);
4372         if (!mac_addr_p) {
4373                 dev_err(&dev->dev,
4374                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4375                         __FILE__, __LINE__);
4376                 return 0;
4377         }
4378
4379         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4380                                    IBMVNIC_MAX_QUEUES);
4381         if (!netdev)
4382                 return -ENOMEM;
4383
4384         adapter = netdev_priv(netdev);
4385         adapter->state = VNIC_PROBING;
4386         dev_set_drvdata(&dev->dev, netdev);
4387         adapter->vdev = dev;
4388         adapter->netdev = netdev;
4389
4390         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4391         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4392         netdev->irq = dev->irq;
4393         netdev->netdev_ops = &ibmvnic_netdev_ops;
4394         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4395         SET_NETDEV_DEV(netdev, &dev->dev);
4396
4397         spin_lock_init(&adapter->stats_lock);
4398
4399         INIT_LIST_HEAD(&adapter->errors);
4400         spin_lock_init(&adapter->error_list_lock);
4401
4402         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4403         INIT_LIST_HEAD(&adapter->rwi_list);
4404         mutex_init(&adapter->reset_lock);
4405         mutex_init(&adapter->rwi_lock);
4406         adapter->resetting = false;
4407
4408         adapter->mac_change_pending = false;
4409
4410         do {
4411                 rc = ibmvnic_init(adapter);
4412                 if (rc && rc != EAGAIN)
4413                         goto ibmvnic_init_fail;
4414         } while (rc == EAGAIN);
4415
4416         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4417         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4418         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4419
4420         rc = device_create_file(&dev->dev, &dev_attr_failover);
4421         if (rc)
4422                 goto ibmvnic_init_fail;
4423
4424         netif_carrier_off(netdev);
4425         rc = register_netdev(netdev);
4426         if (rc) {
4427                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4428                 goto ibmvnic_register_fail;
4429         }
4430         dev_info(&dev->dev, "ibmvnic registered\n");
4431
4432         adapter->state = VNIC_PROBED;
4433
4434         adapter->wait_for_reset = false;
4435
4436         return 0;
4437
4438 ibmvnic_register_fail:
4439         device_remove_file(&dev->dev, &dev_attr_failover);
4440
4441 ibmvnic_init_fail:
4442         release_sub_crqs(adapter);
4443         release_crq_queue(adapter);
4444         free_netdev(netdev);
4445
4446         return rc;
4447 }
4448
4449 static int ibmvnic_remove(struct vio_dev *dev)
4450 {
4451         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4452         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4453
4454         adapter->state = VNIC_REMOVING;
4455         unregister_netdev(netdev);
4456         mutex_lock(&adapter->reset_lock);
4457
4458         release_resources(adapter);
4459         release_sub_crqs(adapter);
4460         release_crq_queue(adapter);
4461
4462         adapter->state = VNIC_REMOVED;
4463
4464         mutex_unlock(&adapter->reset_lock);
4465         device_remove_file(&dev->dev, &dev_attr_failover);
4466         free_netdev(netdev);
4467         dev_set_drvdata(&dev->dev, NULL);
4468
4469         return 0;
4470 }
4471
4472 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4473                               const char *buf, size_t count)
4474 {
4475         struct net_device *netdev = dev_get_drvdata(dev);
4476         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4477         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4478         __be64 session_token;
4479         long rc;
4480
4481         if (!sysfs_streq(buf, "1"))
4482                 return -EINVAL;
4483
4484         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4485                          H_GET_SESSION_TOKEN, 0, 0, 0);
4486         if (rc) {
4487                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4488                            rc);
4489                 return -EINVAL;
4490         }
4491
4492         session_token = (__be64)retbuf[0];
4493         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4494                    be64_to_cpu(session_token));
4495         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4496                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4497         if (rc) {
4498                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4499                            rc);
4500                 return -EINVAL;
4501         }
4502
4503         return count;
4504 }
4505
4506 static DEVICE_ATTR_WO(failover);
4507
4508 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4509 {
4510         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4511         struct ibmvnic_adapter *adapter;
4512         struct iommu_table *tbl;
4513         unsigned long ret = 0;
4514         int i;
4515
4516         tbl = get_iommu_table_base(&vdev->dev);
4517
4518         /* netdev inits at probe time along with the structures we need below*/
4519         if (!netdev)
4520                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4521
4522         adapter = netdev_priv(netdev);
4523
4524         ret += PAGE_SIZE; /* the crq message queue */
4525         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4526
4527         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4528                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4529
4530         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4531              i++)
4532                 ret += adapter->rx_pool[i].size *
4533                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4534
4535         return ret;
4536 }
4537
4538 static int ibmvnic_resume(struct device *dev)
4539 {
4540         struct net_device *netdev = dev_get_drvdata(dev);
4541         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4542
4543         if (adapter->state != VNIC_OPEN)
4544                 return 0;
4545
4546         tasklet_schedule(&adapter->tasklet);
4547
4548         return 0;
4549 }
4550
4551 static const struct vio_device_id ibmvnic_device_table[] = {
4552         {"network", "IBM,vnic"},
4553         {"", "" }
4554 };
4555 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4556
4557 static const struct dev_pm_ops ibmvnic_pm_ops = {
4558         .resume = ibmvnic_resume
4559 };
4560
4561 static struct vio_driver ibmvnic_driver = {
4562         .id_table       = ibmvnic_device_table,
4563         .probe          = ibmvnic_probe,
4564         .remove         = ibmvnic_remove,
4565         .get_desired_dma = ibmvnic_get_desired_dma,
4566         .name           = ibmvnic_driver_name,
4567         .pm             = &ibmvnic_pm_ops,
4568 };
4569
4570 /* module functions */
4571 static int __init ibmvnic_module_init(void)
4572 {
4573         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4574                 IBMVNIC_DRIVER_VERSION);
4575
4576         return vio_register_driver(&ibmvnic_driver);
4577 }
4578
4579 static void __exit ibmvnic_module_exit(void)
4580 {
4581         vio_unregister_driver(&ibmvnic_driver);
4582 }
4583
4584 module_init(ibmvnic_module_init);
4585 module_exit(ibmvnic_module_exit);