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