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