drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/if_arp.h>
  63 #include <linux/in.h>
  64 #include <linux/ip.h>
  65 #include <linux/ipv6.h>
  66 #include <linux/irq.h>
  67 #include <linux/kthread.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78 #include <linux/if_vlan.h>
  79 #include <linux/utsname.h>
  80
  81 #include "ibmvnic.h"
  82
  83 static const char ibmvnic_driver_name[] = "ibmvnic";
  84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  85
  86 MODULE_AUTHOR("Santiago Leon");
  87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  88 MODULE_LICENSE("GPL");
  89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  90
  91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  92 static int ibmvnic_remove(struct vio_dev *);
  93 static void release_sub_crqs(struct ibmvnic_adapter *);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 114 static void send_login(struct ibmvnic_adapter *adapter);
 115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 116 static int init_sub_crqs(struct ibmvnic_adapter *);
 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 118 static int ibmvnic_init(struct ibmvnic_adapter *);
 119 static void release_crq_queue(struct ibmvnic_adapter *);
 120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
 121
 122 struct ibmvnic_stat {
 123         char name[ETH_GSTRING_LEN];
 124         int offset;
 125 };
 126
 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 128                              offsetof(struct ibmvnic_statistics, stat))
 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 130
 131 static const struct ibmvnic_stat ibmvnic_stats[] = {
 132         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 133         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 134         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 135         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 136         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 137         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 138         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 139         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 140         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 141         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 142         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 143         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 144         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 145         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 146         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 147         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 148         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 149         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 150         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 151         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 152         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 153         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 154 };
 155
 156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 157                           unsigned long length, unsigned long *number,
 158                           unsigned long *irq)
 159 {
 160         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 161         long rc;
 162
 163         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 164         *number = retbuf[0];
 165         *irq = retbuf[1];
 166
 167         return rc;
 168 }
 169
 170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 171                                 struct ibmvnic_long_term_buff *ltb, int size)
 172 {
 173         struct device *dev = &adapter->vdev->dev;
 174
 175         ltb->size = size;
 176         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 177                                        GFP_KERNEL);
 178
 179         if (!ltb->buff) {
 180                 dev_err(dev, "Couldn't alloc long term buffer\n");
 181                 return -ENOMEM;
 182         }
 183         ltb->map_id = adapter->map_id;
 184         adapter->map_id++;
 185
 186         init_completion(&adapter->fw_done);
 187         send_request_map(adapter, ltb->addr,
 188                          ltb->size, ltb->map_id);
 189         wait_for_completion(&adapter->fw_done);
 190
 191         if (adapter->fw_done_rc) {
 192                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 193                         adapter->fw_done_rc);
 194                 return -1;
 195         }
 196         return 0;
 197 }
 198
 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 200                                 struct ibmvnic_long_term_buff *ltb)
 201 {
 202         struct device *dev = &adapter->vdev->dev;
 203
 204         if (!ltb->buff)
 205                 return;
 206
 207         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 208             adapter->reset_reason != VNIC_RESET_MOBILITY)
 209                 send_request_unmap(adapter, ltb->map_id);
 210         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 211 }
 212
 213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 214                                 struct ibmvnic_long_term_buff *ltb)
 215 {
 216         memset(ltb->buff, 0, ltb->size);
 217
 218         init_completion(&adapter->fw_done);
 219         send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 220         wait_for_completion(&adapter->fw_done);
 221
 222         if (adapter->fw_done_rc) {
 223                 dev_info(&adapter->vdev->dev,
 224                          "Reset failed, attempting to free and reallocate buffer\n");
 225                 free_long_term_buff(adapter, ltb);
 226                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 227         }
 228         return 0;
 229 }
 230
 231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 232 {
 233         int i;
 234
 235         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 236              i++)
 237                 adapter->rx_pool[i].active = 0;
 238 }
 239
 240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 241                               struct ibmvnic_rx_pool *pool)
 242 {
 243         int count = pool->size - atomic_read(&pool->available);
 244         struct device *dev = &adapter->vdev->dev;
 245         int buffers_added = 0;
 246         unsigned long lpar_rc;
 247         union sub_crq sub_crq;
 248         struct sk_buff *skb;
 249         unsigned int offset;
 250         dma_addr_t dma_addr;
 251         unsigned char *dst;
 252         u64 *handle_array;
 253         int shift = 0;
 254         int index;
 255         int i;
 256
 257         if (!pool->active)
 258                 return;
 259
 260         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 261                                       be32_to_cpu(adapter->login_rsp_buf->
 262                                       off_rxadd_subcrqs));
 263
 264         for (i = 0; i < count; ++i) {
 265                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 266                 if (!skb) {
 267                         dev_err(dev, "Couldn't replenish rx buff\n");
 268                         adapter->replenish_no_mem++;
 269                         break;
 270                 }
 271
 272                 index = pool->free_map[pool->next_free];
 273
 274                 if (pool->rx_buff[index].skb)
 275                         dev_err(dev, "Inconsistent free_map!\n");
 276
 277                 /* Copy the skb to the long term mapped DMA buffer */
 278                 offset = index * pool->buff_size;
 279                 dst = pool->long_term_buff.buff + offset;
 280                 memset(dst, 0, pool->buff_size);
 281                 dma_addr = pool->long_term_buff.addr + offset;
 282                 pool->rx_buff[index].data = dst;
 283
 284                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 285                 pool->rx_buff[index].dma = dma_addr;
 286                 pool->rx_buff[index].skb = skb;
 287                 pool->rx_buff[index].pool_index = pool->index;
 288                 pool->rx_buff[index].size = pool->buff_size;
 289
 290                 memset(&sub_crq, 0, sizeof(sub_crq));
 291                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 292                 sub_crq.rx_add.correlator =
 293                     cpu_to_be64((u64)&pool->rx_buff[index]);
 294                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 295                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 296
 297                 /* The length field of the sCRQ is defined to be 24 bits so the
 298                  * buffer size needs to be left shifted by a byte before it is
 299                  * converted to big endian to prevent the last byte from being
 300                  * truncated.
 301                  */
 302 #ifdef __LITTLE_ENDIAN__
 303                 shift = 8;
 304 #endif
 305                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 306
 307                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 308                                       &sub_crq);
 309                 if (lpar_rc != H_SUCCESS)
 310                         goto failure;
 311
 312                 buffers_added++;
 313                 adapter->replenish_add_buff_success++;
 314                 pool->next_free = (pool->next_free + 1) % pool->size;
 315         }
 316         atomic_add(buffers_added, &pool->available);
 317         return;
 318
 319 failure:
 320         dev_info(dev, "replenish pools failure\n");
 321         pool->free_map[pool->next_free] = index;
 322         pool->rx_buff[index].skb = NULL;
 323         if (!dma_mapping_error(dev, dma_addr))
 324                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 325                                  DMA_FROM_DEVICE);
 326
 327         dev_kfree_skb_any(skb);
 328         adapter->replenish_add_buff_failure++;
 329         atomic_add(buffers_added, &pool->available);
 330
 331         if (lpar_rc == H_CLOSED) {
 332                 /* Disable buffer pool replenishment and report carrier off if
 333                  * queue is closed. Firmware guarantees that a signal will
 334                  * be sent to the driver, triggering a reset.
 335                  */
 336                 deactivate_rx_pools(adapter);
 337                 netif_carrier_off(adapter->netdev);
 338         }
 339 }
 340
 341 static void replenish_pools(struct ibmvnic_adapter *adapter)
 342 {
 343         int i;
 344
 345         adapter->replenish_task_cycles++;
 346         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 347              i++) {
 348                 if (adapter->rx_pool[i].active)
 349                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 350         }
 351 }
 352
 353 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 354 {
 355         kfree(adapter->tx_stats_buffers);
 356         kfree(adapter->rx_stats_buffers);
 357         adapter->tx_stats_buffers = NULL;
 358         adapter->rx_stats_buffers = NULL;
 359 }
 360
 361 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 362 {
 363         adapter->tx_stats_buffers =
 364                                 kcalloc(adapter->req_tx_queues,
 365                                         sizeof(struct ibmvnic_tx_queue_stats),
 366                                         GFP_KERNEL);
 367         if (!adapter->tx_stats_buffers)
 368                 return -ENOMEM;
 369
 370         adapter->rx_stats_buffers =
 371                                 kcalloc(adapter->req_rx_queues,
 372                                         sizeof(struct ibmvnic_rx_queue_stats),
 373                                         GFP_KERNEL);
 374         if (!adapter->rx_stats_buffers)
 375                 return -ENOMEM;
 376
 377         return 0;
 378 }
 379
 380 static void release_stats_token(struct ibmvnic_adapter *adapter)
 381 {
 382         struct device *dev = &adapter->vdev->dev;
 383
 384         if (!adapter->stats_token)
 385                 return;
 386
 387         dma_unmap_single(dev, adapter->stats_token,
 388                          sizeof(struct ibmvnic_statistics),
 389                          DMA_FROM_DEVICE);
 390         adapter->stats_token = 0;
 391 }
 392
 393 static int init_stats_token(struct ibmvnic_adapter *adapter)
 394 {
 395         struct device *dev = &adapter->vdev->dev;
 396         dma_addr_t stok;
 397
 398         stok = dma_map_single(dev, &adapter->stats,
 399                               sizeof(struct ibmvnic_statistics),
 400                               DMA_FROM_DEVICE);
 401         if (dma_mapping_error(dev, stok)) {
 402                 dev_err(dev, "Couldn't map stats buffer\n");
 403                 return -1;
 404         }
 405
 406         adapter->stats_token = stok;
 407         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 408         return 0;
 409 }
 410
 411 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 412 {
 413         struct ibmvnic_rx_pool *rx_pool;
 414         int rx_scrqs;
 415         int i, j, rc;
 416         u64 *size_array;
 417
 418         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 419                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 420
 421         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 422         for (i = 0; i < rx_scrqs; i++) {
 423                 rx_pool = &adapter->rx_pool[i];
 424
 425                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 426
 427                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 428                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 429                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 430                         alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 431                                              rx_pool->size *
 432                                              rx_pool->buff_size);
 433                 } else {
 434                         rc = reset_long_term_buff(adapter,
 435                                                   &rx_pool->long_term_buff);
 436                 }
 437
 438                 if (rc)
 439                         return rc;
 440
 441                 for (j = 0; j < rx_pool->size; j++)
 442                         rx_pool->free_map[j] = j;
 443
 444                 memset(rx_pool->rx_buff, 0,
 445                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 446
 447                 atomic_set(&rx_pool->available, 0);
 448                 rx_pool->next_alloc = 0;
 449                 rx_pool->next_free = 0;
 450                 rx_pool->active = 1;
 451         }
 452
 453         return 0;
 454 }
 455
 456 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 457 {
 458         struct ibmvnic_rx_pool *rx_pool;
 459         int i, j;
 460
 461         if (!adapter->rx_pool)
 462                 return;
 463
 464         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 465                 rx_pool = &adapter->rx_pool[i];
 466
 467                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 468
 469                 kfree(rx_pool->free_map);
 470                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 471
 472                 if (!rx_pool->rx_buff)
 473                         continue;
 474
 475                 for (j = 0; j < rx_pool->size; j++) {
 476                         if (rx_pool->rx_buff[j].skb) {
 477                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 478                                 rx_pool->rx_buff[i].skb = NULL;
 479                         }
 480                 }
 481
 482                 kfree(rx_pool->rx_buff);
 483         }
 484
 485         kfree(adapter->rx_pool);
 486         adapter->rx_pool = NULL;
 487         adapter->num_active_rx_pools = 0;
 488 }
 489
 490 static int init_rx_pools(struct net_device *netdev)
 491 {
 492         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 493         struct device *dev = &adapter->vdev->dev;
 494         struct ibmvnic_rx_pool *rx_pool;
 495         int rxadd_subcrqs;
 496         u64 *size_array;
 497         int i, j;
 498
 499         rxadd_subcrqs =
 500                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 501         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 502                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 503
 504         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 505                                    sizeof(struct ibmvnic_rx_pool),
 506                                    GFP_KERNEL);
 507         if (!adapter->rx_pool) {
 508                 dev_err(dev, "Failed to allocate rx pools\n");
 509                 return -1;
 510         }
 511
 512         adapter->num_active_rx_pools = 0;
 513
 514         for (i = 0; i < rxadd_subcrqs; i++) {
 515                 rx_pool = &adapter->rx_pool[i];
 516
 517                 netdev_dbg(adapter->netdev,
 518                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 519                            i, adapter->req_rx_add_entries_per_subcrq,
 520                            be64_to_cpu(size_array[i]));
 521
 522                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 523                 rx_pool->index = i;
 524                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 525                 rx_pool->active = 1;
 526
 527                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 528                                             GFP_KERNEL);
 529                 if (!rx_pool->free_map) {
 530                         release_rx_pools(adapter);
 531                         return -1;
 532                 }
 533
 534                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 535                                            sizeof(struct ibmvnic_rx_buff),
 536                                            GFP_KERNEL);
 537                 if (!rx_pool->rx_buff) {
 538                         dev_err(dev, "Couldn't alloc rx buffers\n");
 539                         release_rx_pools(adapter);
 540                         return -1;
 541                 }
 542
 543                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 544                                          rx_pool->size * rx_pool->buff_size)) {
 545                         release_rx_pools(adapter);
 546                         return -1;
 547                 }
 548
 549                 for (j = 0; j < rx_pool->size; ++j)
 550                         rx_pool->free_map[j] = j;
 551
 552                 atomic_set(&rx_pool->available, 0);
 553                 rx_pool->next_alloc = 0;
 554                 rx_pool->next_free = 0;
 555         }
 556
 557         adapter->num_active_rx_pools = rxadd_subcrqs;
 558
 559         return 0;
 560 }
 561
 562 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 563 {
 564         struct ibmvnic_tx_pool *tx_pool;
 565         int tx_scrqs;
 566         int i, j, rc;
 567
 568         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 569         for (i = 0; i < tx_scrqs; i++) {
 570                 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
 571
 572                 tx_pool = &adapter->tx_pool[i];
 573
 574                 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 575                 if (rc)
 576                         return rc;
 577
 578                 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
 579                 if (rc)
 580                         return rc;
 581
 582                 memset(tx_pool->tx_buff, 0,
 583                        adapter->req_tx_entries_per_subcrq *
 584                        sizeof(struct ibmvnic_tx_buff));
 585
 586                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 587                         tx_pool->free_map[j] = j;
 588
 589                 tx_pool->consumer_index = 0;
 590                 tx_pool->producer_index = 0;
 591                 tx_pool->tso_index = 0;
 592         }
 593
 594         return 0;
 595 }
 596
 597 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 598 {
 599         if (!adapter->vpd)
 600                 return;
 601
 602         kfree(adapter->vpd->buff);
 603         kfree(adapter->vpd);
 604
 605         adapter->vpd = NULL;
 606 }
 607
 608 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 609 {
 610         struct ibmvnic_tx_pool *tx_pool;
 611         int i;
 612
 613         if (!adapter->tx_pool)
 614                 return;
 615
 616         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 617                 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
 618                 tx_pool = &adapter->tx_pool[i];
 619                 kfree(tx_pool->tx_buff);
 620                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 621                 free_long_term_buff(adapter, &tx_pool->tso_ltb);
 622                 kfree(tx_pool->free_map);
 623         }
 624
 625         kfree(adapter->tx_pool);
 626         adapter->tx_pool = NULL;
 627         adapter->num_active_tx_pools = 0;
 628 }
 629
 630 static int init_tx_pools(struct net_device *netdev)
 631 {
 632         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 633         struct device *dev = &adapter->vdev->dev;
 634         struct ibmvnic_tx_pool *tx_pool;
 635         int tx_subcrqs;
 636         int i, j;
 637
 638         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 639         adapter->tx_pool = kcalloc(tx_subcrqs,
 640                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 641         if (!adapter->tx_pool)
 642                 return -1;
 643
 644         adapter->num_active_tx_pools = 0;
 645
 646         for (i = 0; i < tx_subcrqs; i++) {
 647                 tx_pool = &adapter->tx_pool[i];
 648
 649                 netdev_dbg(adapter->netdev,
 650                            "Initializing tx_pool[%d], %lld buffs\n",
 651                            i, adapter->req_tx_entries_per_subcrq);
 652
 653                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 654                                            sizeof(struct ibmvnic_tx_buff),
 655                                            GFP_KERNEL);
 656                 if (!tx_pool->tx_buff) {
 657                         dev_err(dev, "tx pool buffer allocation failed\n");
 658                         release_tx_pools(adapter);
 659                         return -1;
 660                 }
 661
 662                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 663                                          adapter->req_tx_entries_per_subcrq *
 664                                          adapter->req_mtu)) {
 665                         release_tx_pools(adapter);
 666                         return -1;
 667                 }
 668
 669                 /* alloc TSO ltb */
 670                 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
 671                                          IBMVNIC_TSO_BUFS *
 672                                          IBMVNIC_TSO_BUF_SZ)) {
 673                         release_tx_pools(adapter);
 674                         return -1;
 675                 }
 676
 677                 tx_pool->tso_index = 0;
 678
 679                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 680                                             sizeof(int), GFP_KERNEL);
 681                 if (!tx_pool->free_map) {
 682                         release_tx_pools(adapter);
 683                         return -1;
 684                 }
 685
 686                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 687                         tx_pool->free_map[j] = j;
 688
 689                 tx_pool->consumer_index = 0;
 690                 tx_pool->producer_index = 0;
 691         }
 692
 693         adapter->num_active_tx_pools = tx_subcrqs;
 694
 695         return 0;
 696 }
 697
 698 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 699 {
 700         struct device *dev = &adapter->vdev->dev;
 701         struct ibmvnic_error_buff *error_buff, *tmp;
 702         unsigned long flags;
 703
 704         spin_lock_irqsave(&adapter->error_list_lock, flags);
 705         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 706                 list_del(&error_buff->list);
 707                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 708                                  DMA_FROM_DEVICE);
 709                 kfree(error_buff->buff);
 710                 kfree(error_buff);
 711         }
 712         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 713 }
 714
 715 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 716 {
 717         int i;
 718
 719         if (adapter->napi_enabled)
 720                 return;
 721
 722         for (i = 0; i < adapter->req_rx_queues; i++)
 723                 napi_enable(&adapter->napi[i]);
 724
 725         adapter->napi_enabled = true;
 726 }
 727
 728 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 729 {
 730         int i;
 731
 732         if (!adapter->napi_enabled)
 733                 return;
 734
 735         for (i = 0; i < adapter->req_rx_queues; i++) {
 736                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 737                 napi_disable(&adapter->napi[i]);
 738         }
 739
 740         adapter->napi_enabled = false;
 741 }
 742
 743 static int ibmvnic_login(struct net_device *netdev)
 744 {
 745         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 746         unsigned long timeout = msecs_to_jiffies(30000);
 747         struct device *dev = &adapter->vdev->dev;
 748         int rc;
 749
 750         do {
 751                 if (adapter->renegotiate) {
 752                         adapter->renegotiate = false;
 753                         release_sub_crqs(adapter);
 754
 755                         reinit_completion(&adapter->init_done);
 756                         send_cap_queries(adapter);
 757                         if (!wait_for_completion_timeout(&adapter->init_done,
 758                                                          timeout)) {
 759                                 dev_err(dev, "Capabilities query timeout\n");
 760                                 return -1;
 761                         }
 762                         rc = init_sub_crqs(adapter);
 763                         if (rc) {
 764                                 dev_err(dev,
 765                                         "Initialization of SCRQ's failed\n");
 766                                 return -1;
 767                         }
 768                         rc = init_sub_crq_irqs(adapter);
 769                         if (rc) {
 770                                 dev_err(dev,
 771                                         "Initialization of SCRQ's irqs failed\n");
 772                                 return -1;
 773                         }
 774                 }
 775
 776                 reinit_completion(&adapter->init_done);
 777                 send_login(adapter);
 778                 if (!wait_for_completion_timeout(&adapter->init_done,
 779                                                  timeout)) {
 780                         dev_err(dev, "Login timeout\n");
 781                         return -1;
 782                 }
 783         } while (adapter->renegotiate);
 784
 785         /* handle pending MAC address changes after successful login */
 786         if (adapter->mac_change_pending) {
 787                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 788                 adapter->mac_change_pending = false;
 789         }
 790
 791         return 0;
 792 }
 793
 794 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 795 {
 796         kfree(adapter->login_buf);
 797         adapter->login_buf = NULL;
 798 }
 799
 800 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 801 {
 802         kfree(adapter->login_rsp_buf);
 803         adapter->login_rsp_buf = NULL;
 804 }
 805
 806 static void release_resources(struct ibmvnic_adapter *adapter)
 807 {
 808         int i;
 809
 810         release_vpd_data(adapter);
 811
 812         release_tx_pools(adapter);
 813         release_rx_pools(adapter);
 814
 815         release_stats_token(adapter);
 816         release_stats_buffers(adapter);
 817         release_error_buffers(adapter);
 818
 819         if (adapter->napi) {
 820                 for (i = 0; i < adapter->req_rx_queues; i++) {
 821                         if (&adapter->napi[i]) {
 822                                 netdev_dbg(adapter->netdev,
 823                                            "Releasing napi[%d]\n", i);
 824                                 netif_napi_del(&adapter->napi[i]);
 825                         }
 826                 }
 827         }
 828         kfree(adapter->napi);
 829         adapter->napi = NULL;
 830
 831         release_login_rsp_buffer(adapter);
 832 }
 833
 834 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 835 {
 836         struct net_device *netdev = adapter->netdev;
 837         unsigned long timeout = msecs_to_jiffies(30000);
 838         union ibmvnic_crq crq;
 839         bool resend;
 840         int rc;
 841
 842         netdev_dbg(netdev, "setting link state %d\n", link_state);
 843
 844         memset(&crq, 0, sizeof(crq));
 845         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 846         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 847         crq.logical_link_state.link_state = link_state;
 848
 849         do {
 850                 resend = false;
 851
 852                 reinit_completion(&adapter->init_done);
 853                 rc = ibmvnic_send_crq(adapter, &crq);
 854                 if (rc) {
 855                         netdev_err(netdev, "Failed to set link state\n");
 856                         return rc;
 857                 }
 858
 859                 if (!wait_for_completion_timeout(&adapter->init_done,
 860                                                  timeout)) {
 861                         netdev_err(netdev, "timeout setting link state\n");
 862                         return -1;
 863                 }
 864
 865                 if (adapter->init_done_rc == 1) {
 866                         /* Partuial success, delay and re-send */
 867                         mdelay(1000);
 868                         resend = true;
 869                 }
 870         } while (resend);
 871
 872         return 0;
 873 }
 874
 875 static int set_real_num_queues(struct net_device *netdev)
 876 {
 877         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 878         int rc;
 879
 880         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 881                    adapter->req_tx_queues, adapter->req_rx_queues);
 882
 883         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 884         if (rc) {
 885                 netdev_err(netdev, "failed to set the number of tx queues\n");
 886                 return rc;
 887         }
 888
 889         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 890         if (rc)
 891                 netdev_err(netdev, "failed to set the number of rx queues\n");
 892
 893         return rc;
 894 }
 895
 896 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 897 {
 898         struct device *dev = &adapter->vdev->dev;
 899         union ibmvnic_crq crq;
 900         int len = 0;
 901
 902         if (adapter->vpd->buff)
 903                 len = adapter->vpd->len;
 904
 905         init_completion(&adapter->fw_done);
 906         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 907         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 908         ibmvnic_send_crq(adapter, &crq);
 909         wait_for_completion(&adapter->fw_done);
 910
 911         if (!adapter->vpd->len)
 912                 return -ENODATA;
 913
 914         if (!adapter->vpd->buff)
 915                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 916         else if (adapter->vpd->len != len)
 917                 adapter->vpd->buff =
 918                         krealloc(adapter->vpd->buff,
 919                                  adapter->vpd->len, GFP_KERNEL);
 920
 921         if (!adapter->vpd->buff) {
 922                 dev_err(dev, "Could allocate VPD buffer\n");
 923                 return -ENOMEM;
 924         }
 925
 926         adapter->vpd->dma_addr =
 927                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 928                                DMA_FROM_DEVICE);
 929         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 930                 dev_err(dev, "Could not map VPD buffer\n");
 931                 kfree(adapter->vpd->buff);
 932                 adapter->vpd->buff = NULL;
 933                 return -ENOMEM;
 934         }
 935
 936         reinit_completion(&adapter->fw_done);
 937         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 938         crq.get_vpd.cmd = GET_VPD;
 939         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 940         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
 941         ibmvnic_send_crq(adapter, &crq);
 942         wait_for_completion(&adapter->fw_done);
 943
 944         return 0;
 945 }
 946
 947 static int init_resources(struct ibmvnic_adapter *adapter)
 948 {
 949         struct net_device *netdev = adapter->netdev;
 950         int i, rc;
 951
 952         rc = set_real_num_queues(netdev);
 953         if (rc)
 954                 return rc;
 955
 956         rc = init_stats_buffers(adapter);
 957         if (rc)
 958                 return rc;
 959
 960         rc = init_stats_token(adapter);
 961         if (rc)
 962                 return rc;
 963
 964         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
 965         if (!adapter->vpd)
 966                 return -ENOMEM;
 967
 968         /* Vital Product Data (VPD) */
 969         rc = ibmvnic_get_vpd(adapter);
 970         if (rc) {
 971                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
 972                 return rc;
 973         }
 974
 975         adapter->map_id = 1;
 976         adapter->napi = kcalloc(adapter->req_rx_queues,
 977                                 sizeof(struct napi_struct), GFP_KERNEL);
 978         if (!adapter->napi)
 979                 return -ENOMEM;
 980
 981         for (i = 0; i < adapter->req_rx_queues; i++) {
 982                 netdev_dbg(netdev, "Adding napi[%d]\n", i);
 983                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 984                                NAPI_POLL_WEIGHT);
 985         }
 986
 987         send_map_query(adapter);
 988
 989         rc = init_rx_pools(netdev);
 990         if (rc)
 991                 return rc;
 992
 993         rc = init_tx_pools(netdev);
 994         return rc;
 995 }
 996
 997 static int __ibmvnic_open(struct net_device *netdev)
 998 {
 999         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1000         enum vnic_state prev_state = adapter->state;
1001         int i, rc;
1002
1003         adapter->state = VNIC_OPENING;
1004         replenish_pools(adapter);
1005         ibmvnic_napi_enable(adapter);
1006
1007         /* We're ready to receive frames, enable the sub-crq interrupts and
1008          * set the logical link state to up
1009          */
1010         for (i = 0; i < adapter->req_rx_queues; i++) {
1011                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1012                 if (prev_state == VNIC_CLOSED)
1013                         enable_irq(adapter->rx_scrq[i]->irq);
1014                 else
1015                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1016         }
1017
1018         for (i = 0; i < adapter->req_tx_queues; i++) {
1019                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1020                 if (prev_state == VNIC_CLOSED)
1021                         enable_irq(adapter->tx_scrq[i]->irq);
1022                 else
1023                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1024         }
1025
1026         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1027         if (rc) {
1028                 for (i = 0; i < adapter->req_rx_queues; i++)
1029                         napi_disable(&adapter->napi[i]);
1030                 release_resources(adapter);
1031                 return rc;
1032         }
1033
1034         netif_tx_start_all_queues(netdev);
1035
1036         if (prev_state == VNIC_CLOSED) {
1037                 for (i = 0; i < adapter->req_rx_queues; i++)
1038                         napi_schedule(&adapter->napi[i]);
1039         }
1040
1041         adapter->state = VNIC_OPEN;
1042         return rc;
1043 }
1044
1045 static int ibmvnic_open(struct net_device *netdev)
1046 {
1047         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1048         int rc;
1049
1050         mutex_lock(&adapter->reset_lock);
1051
1052         if (adapter->state != VNIC_CLOSED) {
1053                 rc = ibmvnic_login(netdev);
1054                 if (rc) {
1055                         mutex_unlock(&adapter->reset_lock);
1056                         return rc;
1057                 }
1058
1059                 rc = init_resources(adapter);
1060                 if (rc) {
1061                         netdev_err(netdev, "failed to initialize resources\n");
1062                         release_resources(adapter);
1063                         mutex_unlock(&adapter->reset_lock);
1064                         return rc;
1065                 }
1066         }
1067
1068         rc = __ibmvnic_open(netdev);
1069         netif_carrier_on(netdev);
1070
1071         mutex_unlock(&adapter->reset_lock);
1072
1073         return rc;
1074 }
1075
1076 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1077 {
1078         struct ibmvnic_rx_pool *rx_pool;
1079         u64 rx_entries;
1080         int rx_scrqs;
1081         int i, j;
1082
1083         if (!adapter->rx_pool)
1084                 return;
1085
1086         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
1087         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1088
1089         /* Free any remaining skbs in the rx buffer pools */
1090         for (i = 0; i < rx_scrqs; i++) {
1091                 rx_pool = &adapter->rx_pool[i];
1092                 if (!rx_pool)
1093                         continue;
1094
1095                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1096                 for (j = 0; j < rx_entries; j++) {
1097                         if (rx_pool->rx_buff[j].skb) {
1098                                 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
1099                                 rx_pool->rx_buff[j].skb = NULL;
1100                         }
1101                 }
1102         }
1103 }
1104
1105 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1106 {
1107         struct ibmvnic_tx_pool *tx_pool;
1108         u64 tx_entries;
1109         int tx_scrqs;
1110         int i, j;
1111
1112         if (!adapter->tx_pool)
1113                 return;
1114
1115         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1116         tx_entries = adapter->req_tx_entries_per_subcrq;
1117
1118         /* Free any remaining skbs in the tx buffer pools */
1119         for (i = 0; i < tx_scrqs; i++) {
1120                 tx_pool = &adapter->tx_pool[i];
1121                 if (!tx_pool)
1122                         continue;
1123
1124                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1125                 for (j = 0; j < tx_entries; j++) {
1126                         if (tx_pool->tx_buff[j].skb) {
1127                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1128                                 tx_pool->tx_buff[j].skb = NULL;
1129                         }
1130                 }
1131         }
1132 }
1133
1134 static int __ibmvnic_close(struct net_device *netdev)
1135 {
1136         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1137         int rc = 0;
1138         int i;
1139
1140         adapter->state = VNIC_CLOSING;
1141
1142         /* ensure that transmissions are stopped if called by do_reset */
1143         if (adapter->resetting)
1144                 netif_tx_disable(netdev);
1145         else
1146                 netif_tx_stop_all_queues(netdev);
1147
1148         ibmvnic_napi_disable(adapter);
1149
1150         if (adapter->tx_scrq) {
1151                 for (i = 0; i < adapter->req_tx_queues; i++)
1152                         if (adapter->tx_scrq[i]->irq) {
1153                                 netdev_dbg(adapter->netdev,
1154                                            "Disabling tx_scrq[%d] irq\n", i);
1155                                 disable_irq(adapter->tx_scrq[i]->irq);
1156                         }
1157         }
1158
1159         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1160         if (rc)
1161                 return rc;
1162
1163         if (adapter->rx_scrq) {
1164                 for (i = 0; i < adapter->req_rx_queues; i++) {
1165                         int retries = 10;
1166
1167                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1168                                 retries--;
1169                                 mdelay(100);
1170
1171                                 if (retries == 0)
1172                                         break;
1173                         }
1174
1175                         if (adapter->rx_scrq[i]->irq) {
1176                                 netdev_dbg(adapter->netdev,
1177                                            "Disabling rx_scrq[%d] irq\n", i);
1178                                 disable_irq(adapter->rx_scrq[i]->irq);
1179                         }
1180                 }
1181         }
1182         clean_rx_pools(adapter);
1183         clean_tx_pools(adapter);
1184         adapter->state = VNIC_CLOSED;
1185         return rc;
1186 }
1187
1188 static int ibmvnic_close(struct net_device *netdev)
1189 {
1190         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1191         int rc;
1192
1193         mutex_lock(&adapter->reset_lock);
1194         rc = __ibmvnic_close(netdev);
1195         mutex_unlock(&adapter->reset_lock);
1196
1197         return rc;
1198 }
1199
1200 /**
1201  * build_hdr_data - creates L2/L3/L4 header data buffer
1202  * @hdr_field - bitfield determining needed headers
1203  * @skb - socket buffer
1204  * @hdr_len - array of header lengths
1205  * @tot_len - total length of data
1206  *
1207  * Reads hdr_field to determine which headers are needed by firmware.
1208  * Builds a buffer containing these headers.  Saves individual header
1209  * lengths and total buffer length to be used to build descriptors.
1210  */
1211 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1212                           int *hdr_len, u8 *hdr_data)
1213 {
1214         int len = 0;
1215         u8 *hdr;
1216
1217         hdr_len[0] = sizeof(struct ethhdr);
1218
1219         if (skb->protocol == htons(ETH_P_IP)) {
1220                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1221                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1222                         hdr_len[2] = tcp_hdrlen(skb);
1223                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1224                         hdr_len[2] = sizeof(struct udphdr);
1225         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1226                 hdr_len[1] = sizeof(struct ipv6hdr);
1227                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1228                         hdr_len[2] = tcp_hdrlen(skb);
1229                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1230                         hdr_len[2] = sizeof(struct udphdr);
1231         } else if (skb->protocol == htons(ETH_P_ARP)) {
1232                 hdr_len[1] = arp_hdr_len(skb->dev);
1233                 hdr_len[2] = 0;
1234         }
1235
1236         memset(hdr_data, 0, 120);
1237         if ((hdr_field >> 6) & 1) {
1238                 hdr = skb_mac_header(skb);
1239                 memcpy(hdr_data, hdr, hdr_len[0]);
1240                 len += hdr_len[0];
1241         }
1242
1243         if ((hdr_field >> 5) & 1) {
1244                 hdr = skb_network_header(skb);
1245                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1246                 len += hdr_len[1];
1247         }
1248
1249         if ((hdr_field >> 4) & 1) {
1250                 hdr = skb_transport_header(skb);
1251                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1252                 len += hdr_len[2];
1253         }
1254         return len;
1255 }
1256
1257 /**
1258  * create_hdr_descs - create header and header extension descriptors
1259  * @hdr_field - bitfield determining needed headers
1260  * @data - buffer containing header data
1261  * @len - length of data buffer
1262  * @hdr_len - array of individual header lengths
1263  * @scrq_arr - descriptor array
1264  *
1265  * Creates header and, if needed, header extension descriptors and
1266  * places them in a descriptor array, scrq_arr
1267  */
1268
1269 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1270                             union sub_crq *scrq_arr)
1271 {
1272         union sub_crq hdr_desc;
1273         int tmp_len = len;
1274         int num_descs = 0;
1275         u8 *data, *cur;
1276         int tmp;
1277
1278         while (tmp_len > 0) {
1279                 cur = hdr_data + len - tmp_len;
1280
1281                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1282                 if (cur != hdr_data) {
1283                         data = hdr_desc.hdr_ext.data;
1284                         tmp = tmp_len > 29 ? 29 : tmp_len;
1285                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1286                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1287                         hdr_desc.hdr_ext.len = tmp;
1288                 } else {
1289                         data = hdr_desc.hdr.data;
1290                         tmp = tmp_len > 24 ? 24 : tmp_len;
1291                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1292                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1293                         hdr_desc.hdr.len = tmp;
1294                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1295                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1296                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1297                         hdr_desc.hdr.flag = hdr_field << 1;
1298                 }
1299                 memcpy(data, cur, tmp);
1300                 tmp_len -= tmp;
1301                 *scrq_arr = hdr_desc;
1302                 scrq_arr++;
1303                 num_descs++;
1304         }
1305
1306         return num_descs;
1307 }
1308
1309 /**
1310  * build_hdr_descs_arr - build a header descriptor array
1311  * @skb - socket buffer
1312  * @num_entries - number of descriptors to be sent
1313  * @subcrq - first TX descriptor
1314  * @hdr_field - bit field determining which headers will be sent
1315  *
1316  * This function will build a TX descriptor array with applicable
1317  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1318  */
1319
1320 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1321                                 int *num_entries, u8 hdr_field)
1322 {
1323         int hdr_len[3] = {0, 0, 0};
1324         int tot_len;
1325         u8 *hdr_data = txbuff->hdr_data;
1326
1327         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1328                                  txbuff->hdr_data);
1329         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1330                          txbuff->indir_arr + 1);
1331 }
1332
1333 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1334 {
1335         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1336         int queue_num = skb_get_queue_mapping(skb);
1337         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1338         struct device *dev = &adapter->vdev->dev;
1339         struct ibmvnic_tx_buff *tx_buff = NULL;
1340         struct ibmvnic_sub_crq_queue *tx_scrq;
1341         struct ibmvnic_tx_pool *tx_pool;
1342         unsigned int tx_send_failed = 0;
1343         unsigned int tx_map_failed = 0;
1344         unsigned int tx_dropped = 0;
1345         unsigned int tx_packets = 0;
1346         unsigned int tx_bytes = 0;
1347         dma_addr_t data_dma_addr;
1348         struct netdev_queue *txq;
1349         unsigned long lpar_rc;
1350         union sub_crq tx_crq;
1351         unsigned int offset;
1352         int num_entries = 1;
1353         unsigned char *dst;
1354         u64 *handle_array;
1355         int index = 0;
1356         u8 proto = 0;
1357         int ret = 0;
1358
1359         if (adapter->resetting) {
1360                 if (!netif_subqueue_stopped(netdev, skb))
1361                         netif_stop_subqueue(netdev, queue_num);
1362                 dev_kfree_skb_any(skb);
1363
1364                 tx_send_failed++;
1365                 tx_dropped++;
1366                 ret = NETDEV_TX_OK;
1367                 goto out;
1368         }
1369
1370         tx_pool = &adapter->tx_pool[queue_num];
1371         tx_scrq = adapter->tx_scrq[queue_num];
1372         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1373         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1374                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1375
1376         index = tx_pool->free_map[tx_pool->consumer_index];
1377
1378         if (skb_is_gso(skb)) {
1379                 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1380                 dst = tx_pool->tso_ltb.buff + offset;
1381                 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1382                 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1383                 tx_pool->tso_index++;
1384                 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1385                         tx_pool->tso_index = 0;
1386         } else {
1387                 offset = index * adapter->req_mtu;
1388                 dst = tx_pool->long_term_buff.buff + offset;
1389                 memset(dst, 0, adapter->req_mtu);
1390                 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1391         }
1392
1393         if (skb_shinfo(skb)->nr_frags) {
1394                 int cur, i;
1395
1396                 /* Copy the head */
1397                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1398                 cur = skb_headlen(skb);
1399
1400                 /* Copy the frags */
1401                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1402                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1403
1404                         memcpy(dst + cur,
1405                                page_address(skb_frag_page(frag)) +
1406                                frag->page_offset, skb_frag_size(frag));
1407                         cur += skb_frag_size(frag);
1408                 }
1409         } else {
1410                 skb_copy_from_linear_data(skb, dst, skb->len);
1411         }
1412
1413         tx_pool->consumer_index =
1414             (tx_pool->consumer_index + 1) %
1415                 adapter->req_tx_entries_per_subcrq;
1416
1417         tx_buff = &tx_pool->tx_buff[index];
1418         tx_buff->skb = skb;
1419         tx_buff->data_dma[0] = data_dma_addr;
1420         tx_buff->data_len[0] = skb->len;
1421         tx_buff->index = index;
1422         tx_buff->pool_index = queue_num;
1423         tx_buff->last_frag = true;
1424
1425         memset(&tx_crq, 0, sizeof(tx_crq));
1426         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1427         tx_crq.v1.type = IBMVNIC_TX_DESC;
1428         tx_crq.v1.n_crq_elem = 1;
1429         tx_crq.v1.n_sge = 1;
1430         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1431         tx_crq.v1.correlator = cpu_to_be32(index);
1432         if (skb_is_gso(skb))
1433                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1434         else
1435                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1436         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1437         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1438
1439         if (adapter->vlan_header_insertion) {
1440                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1441                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1442         }
1443
1444         if (skb->protocol == htons(ETH_P_IP)) {
1445                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1446                 proto = ip_hdr(skb)->protocol;
1447         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1448                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1449                 proto = ipv6_hdr(skb)->nexthdr;
1450         }
1451
1452         if (proto == IPPROTO_TCP)
1453                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1454         else if (proto == IPPROTO_UDP)
1455                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1456
1457         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1458                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1459                 hdrs += 2;
1460         }
1461         if (skb_is_gso(skb)) {
1462                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1463                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1464                 hdrs += 2;
1465         }
1466         /* determine if l2/3/4 headers are sent to firmware */
1467         if ((*hdrs >> 7) & 1) {
1468                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1469                 tx_crq.v1.n_crq_elem = num_entries;
1470                 tx_buff->indir_arr[0] = tx_crq;
1471                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1472                                                     sizeof(tx_buff->indir_arr),
1473                                                     DMA_TO_DEVICE);
1474                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1475                         dev_kfree_skb_any(skb);
1476                         tx_buff->skb = NULL;
1477                         if (!firmware_has_feature(FW_FEATURE_CMO))
1478                                 dev_err(dev, "tx: unable to map descriptor array\n");
1479                         tx_map_failed++;
1480                         tx_dropped++;
1481                         ret = NETDEV_TX_OK;
1482                         goto out;
1483                 }
1484                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1485                                                (u64)tx_buff->indir_dma,
1486                                                (u64)num_entries);
1487         } else {
1488                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1489                                       &tx_crq);
1490         }
1491         if (lpar_rc != H_SUCCESS) {
1492                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1493
1494                 if (tx_pool->consumer_index == 0)
1495                         tx_pool->consumer_index =
1496                                 adapter->req_tx_entries_per_subcrq - 1;
1497                 else
1498                         tx_pool->consumer_index--;
1499
1500                 dev_kfree_skb_any(skb);
1501                 tx_buff->skb = NULL;
1502
1503                 if (lpar_rc == H_CLOSED) {
1504                         /* Disable TX and report carrier off if queue is closed.
1505                          * Firmware guarantees that a signal will be sent to the
1506                          * driver, triggering a reset or some other action.
1507                          */
1508                         netif_tx_stop_all_queues(netdev);
1509                         netif_carrier_off(netdev);
1510                 }
1511
1512                 tx_send_failed++;
1513                 tx_dropped++;
1514                 ret = NETDEV_TX_OK;
1515                 goto out;
1516         }
1517
1518         if (atomic_inc_return(&tx_scrq->used)
1519                                         >= adapter->req_tx_entries_per_subcrq) {
1520                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1521                 netif_stop_subqueue(netdev, queue_num);
1522         }
1523
1524         tx_packets++;
1525         tx_bytes += skb->len;
1526         txq->trans_start = jiffies;
1527         ret = NETDEV_TX_OK;
1528
1529 out:
1530         netdev->stats.tx_dropped += tx_dropped;
1531         netdev->stats.tx_bytes += tx_bytes;
1532         netdev->stats.tx_packets += tx_packets;
1533         adapter->tx_send_failed += tx_send_failed;
1534         adapter->tx_map_failed += tx_map_failed;
1535         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1536         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1537         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1538
1539         return ret;
1540 }
1541
1542 static void ibmvnic_set_multi(struct net_device *netdev)
1543 {
1544         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1545         struct netdev_hw_addr *ha;
1546         union ibmvnic_crq crq;
1547
1548         memset(&crq, 0, sizeof(crq));
1549         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1550         crq.request_capability.cmd = REQUEST_CAPABILITY;
1551
1552         if (netdev->flags & IFF_PROMISC) {
1553                 if (!adapter->promisc_supported)
1554                         return;
1555         } else {
1556                 if (netdev->flags & IFF_ALLMULTI) {
1557                         /* Accept all multicast */
1558                         memset(&crq, 0, sizeof(crq));
1559                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1560                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1561                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1562                         ibmvnic_send_crq(adapter, &crq);
1563                 } else if (netdev_mc_empty(netdev)) {
1564                         /* Reject all multicast */
1565                         memset(&crq, 0, sizeof(crq));
1566                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1567                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1568                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1569                         ibmvnic_send_crq(adapter, &crq);
1570                 } else {
1571                         /* Accept one or more multicast(s) */
1572                         netdev_for_each_mc_addr(ha, netdev) {
1573                                 memset(&crq, 0, sizeof(crq));
1574                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1575                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1576                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1577                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1578                                                 ha->addr);
1579                                 ibmvnic_send_crq(adapter, &crq);
1580                         }
1581                 }
1582         }
1583 }
1584
1585 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1586 {
1587         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1588         struct sockaddr *addr = p;
1589         union ibmvnic_crq crq;
1590
1591         if (!is_valid_ether_addr(addr->sa_data))
1592                 return -EADDRNOTAVAIL;
1593
1594         memset(&crq, 0, sizeof(crq));
1595         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1596         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1597         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1598
1599         init_completion(&adapter->fw_done);
1600         ibmvnic_send_crq(adapter, &crq);
1601         wait_for_completion(&adapter->fw_done);
1602         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1603         return adapter->fw_done_rc ? -EIO : 0;
1604 }
1605
1606 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1607 {
1608         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1609         struct sockaddr *addr = p;
1610         int rc;
1611
1612         if (adapter->state == VNIC_PROBED) {
1613                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1614                 adapter->mac_change_pending = true;
1615                 return 0;
1616         }
1617
1618         rc = __ibmvnic_set_mac(netdev, addr);
1619
1620         return rc;
1621 }
1622
1623 /**
1624  * do_reset returns zero if we are able to keep processing reset events, or
1625  * non-zero if we hit a fatal error and must halt.
1626  */
1627 static int do_reset(struct ibmvnic_adapter *adapter,
1628                     struct ibmvnic_rwi *rwi, u32 reset_state)
1629 {
1630         u64 old_num_rx_queues, old_num_tx_queues;
1631         struct net_device *netdev = adapter->netdev;
1632         int i, rc;
1633
1634         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1635                    rwi->reset_reason);
1636
1637         netif_carrier_off(netdev);
1638         adapter->reset_reason = rwi->reset_reason;
1639
1640         old_num_rx_queues = adapter->req_rx_queues;
1641         old_num_tx_queues = adapter->req_tx_queues;
1642
1643         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1644                 rc = ibmvnic_reenable_crq_queue(adapter);
1645                 if (rc)
1646                         return 0;
1647         }
1648
1649         rc = __ibmvnic_close(netdev);
1650         if (rc)
1651                 return rc;
1652
1653         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1654             adapter->wait_for_reset) {
1655                 release_resources(adapter);
1656                 release_sub_crqs(adapter);
1657                 release_crq_queue(adapter);
1658         }
1659
1660         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1661                 /* remove the closed state so when we call open it appears
1662                  * we are coming from the probed state.
1663                  */
1664                 adapter->state = VNIC_PROBED;
1665
1666                 rc = ibmvnic_init(adapter);
1667                 if (rc)
1668                         return IBMVNIC_INIT_FAILED;
1669
1670                 /* If the adapter was in PROBE state prior to the reset,
1671                  * exit here.
1672                  */
1673                 if (reset_state == VNIC_PROBED)
1674                         return 0;
1675
1676                 rc = ibmvnic_login(netdev);
1677                 if (rc) {
1678                         adapter->state = VNIC_PROBED;
1679                         return 0;
1680                 }
1681
1682                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1683                     adapter->wait_for_reset) {
1684                         rc = init_resources(adapter);
1685                         if (rc)
1686                                 return rc;
1687                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1688                            adapter->req_tx_queues != old_num_tx_queues) {
1689                         adapter->map_id = 1;
1690                         release_rx_pools(adapter);
1691                         release_tx_pools(adapter);
1692                         init_rx_pools(netdev);
1693                         init_tx_pools(netdev);
1694                 } else {
1695                         rc = reset_tx_pools(adapter);
1696                         if (rc)
1697                                 return rc;
1698
1699                         rc = reset_rx_pools(adapter);
1700                         if (rc)
1701                                 return rc;
1702
1703                         if (reset_state == VNIC_CLOSED)
1704                                 return 0;
1705                 }
1706         }
1707
1708         rc = __ibmvnic_open(netdev);
1709         if (rc) {
1710                 if (list_empty(&adapter->rwi_list))
1711                         adapter->state = VNIC_CLOSED;
1712                 else
1713                         adapter->state = reset_state;
1714
1715                 return 0;
1716         }
1717
1718         /* kick napi */
1719         for (i = 0; i < adapter->req_rx_queues; i++)
1720                 napi_schedule(&adapter->napi[i]);
1721
1722         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1723                 netdev_notify_peers(netdev);
1724
1725         netif_carrier_on(netdev);
1726
1727         return 0;
1728 }
1729
1730 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1731 {
1732         struct ibmvnic_rwi *rwi;
1733
1734         mutex_lock(&adapter->rwi_lock);
1735
1736         if (!list_empty(&adapter->rwi_list)) {
1737                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1738                                        list);
1739                 list_del(&rwi->list);
1740         } else {
1741                 rwi = NULL;
1742         }
1743
1744         mutex_unlock(&adapter->rwi_lock);
1745         return rwi;
1746 }
1747
1748 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1749 {
1750         struct ibmvnic_rwi *rwi;
1751
1752         rwi = get_next_rwi(adapter);
1753         while (rwi) {
1754                 kfree(rwi);
1755                 rwi = get_next_rwi(adapter);
1756         }
1757 }
1758
1759 static void __ibmvnic_reset(struct work_struct *work)
1760 {
1761         struct ibmvnic_rwi *rwi;
1762         struct ibmvnic_adapter *adapter;
1763         struct net_device *netdev;
1764         u32 reset_state;
1765         int rc = 0;
1766
1767         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1768         netdev = adapter->netdev;
1769
1770         mutex_lock(&adapter->reset_lock);
1771         adapter->resetting = true;
1772         reset_state = adapter->state;
1773
1774         rwi = get_next_rwi(adapter);
1775         while (rwi) {
1776                 rc = do_reset(adapter, rwi, reset_state);
1777                 kfree(rwi);
1778                 if (rc && rc != IBMVNIC_INIT_FAILED)
1779                         break;
1780
1781                 rwi = get_next_rwi(adapter);
1782         }
1783
1784         if (adapter->wait_for_reset) {
1785                 adapter->wait_for_reset = false;
1786                 adapter->reset_done_rc = rc;
1787                 complete(&adapter->reset_done);
1788         }
1789
1790         if (rc) {
1791                 netdev_dbg(adapter->netdev, "Reset failed\n");
1792                 free_all_rwi(adapter);
1793                 mutex_unlock(&adapter->reset_lock);
1794                 return;
1795         }
1796
1797         adapter->resetting = false;
1798         mutex_unlock(&adapter->reset_lock);
1799 }
1800
1801 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1802                           enum ibmvnic_reset_reason reason)
1803 {
1804         struct ibmvnic_rwi *rwi, *tmp;
1805         struct net_device *netdev = adapter->netdev;
1806         struct list_head *entry;
1807
1808         if (adapter->state == VNIC_REMOVING ||
1809             adapter->state == VNIC_REMOVED) {
1810                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1811                 return;
1812         }
1813
1814         if (adapter->state == VNIC_PROBING) {
1815                 netdev_warn(netdev, "Adapter reset during probe\n");
1816                 adapter->init_done_rc = EAGAIN;
1817                 return;
1818         }
1819
1820         mutex_lock(&adapter->rwi_lock);
1821
1822         list_for_each(entry, &adapter->rwi_list) {
1823                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1824                 if (tmp->reset_reason == reason) {
1825                         netdev_dbg(netdev, "Skipping matching reset\n");
1826                         mutex_unlock(&adapter->rwi_lock);
1827                         return;
1828                 }
1829         }
1830
1831         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1832         if (!rwi) {
1833                 mutex_unlock(&adapter->rwi_lock);
1834                 ibmvnic_close(netdev);
1835                 return;
1836         }
1837
1838         rwi->reset_reason = reason;
1839         list_add_tail(&rwi->list, &adapter->rwi_list);
1840         mutex_unlock(&adapter->rwi_lock);
1841
1842         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1843         schedule_work(&adapter->ibmvnic_reset);
1844 }
1845
1846 static void ibmvnic_tx_timeout(struct net_device *dev)
1847 {
1848         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1849
1850         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1851 }
1852
1853 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1854                                   struct ibmvnic_rx_buff *rx_buff)
1855 {
1856         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1857
1858         rx_buff->skb = NULL;
1859
1860         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1861         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1862
1863         atomic_dec(&pool->available);
1864 }
1865
1866 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1867 {
1868         struct net_device *netdev = napi->dev;
1869         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1870         int scrq_num = (int)(napi - adapter->napi);
1871         int frames_processed = 0;
1872
1873 restart_poll:
1874         while (frames_processed < budget) {
1875                 struct sk_buff *skb;
1876                 struct ibmvnic_rx_buff *rx_buff;
1877                 union sub_crq *next;
1878                 u32 length;
1879                 u16 offset;
1880                 u8 flags = 0;
1881
1882                 if (unlikely(adapter->resetting &&
1883                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1884                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1885                         napi_complete_done(napi, frames_processed);
1886                         return frames_processed;
1887                 }
1888
1889                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1890                         break;
1891                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1892                 rx_buff =
1893                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1894                                                           rx_comp.correlator);
1895                 /* do error checking */
1896                 if (next->rx_comp.rc) {
1897                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1898                                    be16_to_cpu(next->rx_comp.rc));
1899                         /* free the entry */
1900                         next->rx_comp.first = 0;
1901                         dev_kfree_skb_any(rx_buff->skb);
1902                         remove_buff_from_pool(adapter, rx_buff);
1903                         continue;
1904                 }
1905
1906                 length = be32_to_cpu(next->rx_comp.len);
1907                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1908                 flags = next->rx_comp.flags;
1909                 skb = rx_buff->skb;
1910                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1911                                         length);
1912
1913                 /* VLAN Header has been stripped by the system firmware and
1914                  * needs to be inserted by the driver
1915                  */
1916                 if (adapter->rx_vlan_header_insertion &&
1917                     (flags & IBMVNIC_VLAN_STRIPPED))
1918                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1919                                                ntohs(next->rx_comp.vlan_tci));
1920
1921                 /* free the entry */
1922                 next->rx_comp.first = 0;
1923                 remove_buff_from_pool(adapter, rx_buff);
1924
1925                 skb_put(skb, length);
1926                 skb->protocol = eth_type_trans(skb, netdev);
1927                 skb_record_rx_queue(skb, scrq_num);
1928
1929                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1930                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1931                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1932                 }
1933
1934                 length = skb->len;
1935                 napi_gro_receive(napi, skb); /* send it up */
1936                 netdev->stats.rx_packets++;
1937                 netdev->stats.rx_bytes += length;
1938                 adapter->rx_stats_buffers[scrq_num].packets++;
1939                 adapter->rx_stats_buffers[scrq_num].bytes += length;
1940                 frames_processed++;
1941         }
1942
1943         if (adapter->state != VNIC_CLOSING)
1944                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1945
1946         if (frames_processed < budget) {
1947                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1948                 napi_complete_done(napi, frames_processed);
1949                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1950                     napi_reschedule(napi)) {
1951                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1952                         goto restart_poll;
1953                 }
1954         }
1955         return frames_processed;
1956 }
1957
1958 #ifdef CONFIG_NET_POLL_CONTROLLER
1959 static void ibmvnic_netpoll_controller(struct net_device *dev)
1960 {
1961         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1962         int i;
1963
1964         replenish_pools(netdev_priv(dev));
1965         for (i = 0; i < adapter->req_rx_queues; i++)
1966                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1967                                      adapter->rx_scrq[i]);
1968 }
1969 #endif
1970
1971 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1972 {
1973         adapter->fallback.mtu = adapter->req_mtu;
1974         adapter->fallback.rx_queues = adapter->req_rx_queues;
1975         adapter->fallback.tx_queues = adapter->req_tx_queues;
1976         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1977         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1978
1979         init_completion(&adapter->reset_done);
1980         ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1981         adapter->wait_for_reset = true;
1982         wait_for_completion(&adapter->reset_done);
1983
1984         if (adapter->reset_done_rc) {
1985                 adapter->desired.mtu = adapter->fallback.mtu;
1986                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1987                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1988                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1989                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1990
1991                 init_completion(&adapter->reset_done);
1992                 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1993                 wait_for_completion(&adapter->reset_done);
1994         }
1995         adapter->wait_for_reset = false;
1996
1997         return adapter->reset_done_rc;
1998 }
1999
2000 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2001 {
2002         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2003
2004         adapter->desired.mtu = new_mtu + ETH_HLEN;
2005
2006         return wait_for_reset(adapter);
2007 }
2008
2009 static const struct net_device_ops ibmvnic_netdev_ops = {
2010         .ndo_open               = ibmvnic_open,
2011         .ndo_stop               = ibmvnic_close,
2012         .ndo_start_xmit         = ibmvnic_xmit,
2013         .ndo_set_rx_mode        = ibmvnic_set_multi,
2014         .ndo_set_mac_address    = ibmvnic_set_mac,
2015         .ndo_validate_addr      = eth_validate_addr,
2016         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2017 #ifdef CONFIG_NET_POLL_CONTROLLER
2018         .ndo_poll_controller    = ibmvnic_netpoll_controller,
2019 #endif
2020         .ndo_change_mtu         = ibmvnic_change_mtu,
2021 };
2022
2023 /* ethtool functions */
2024
2025 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2026                                       struct ethtool_link_ksettings *cmd)
2027 {
2028         u32 supported, advertising;
2029
2030         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2031                           SUPPORTED_FIBRE);
2032         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2033                             ADVERTISED_FIBRE);
2034         cmd->base.speed = SPEED_1000;
2035         cmd->base.duplex = DUPLEX_FULL;
2036         cmd->base.port = PORT_FIBRE;
2037         cmd->base.phy_address = 0;
2038         cmd->base.autoneg = AUTONEG_ENABLE;
2039
2040         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2041                                                 supported);
2042         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2043                                                 advertising);
2044
2045         return 0;
2046 }
2047
2048 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2049                                 struct ethtool_drvinfo *info)
2050 {
2051         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2052
2053         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2054         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2055         strlcpy(info->fw_version, adapter->fw_version,
2056                 sizeof(info->fw_version));
2057 }
2058
2059 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2060 {
2061         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2062
2063         return adapter->msg_enable;
2064 }
2065
2066 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2067 {
2068         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2069
2070         adapter->msg_enable = data;
2071 }
2072
2073 static u32 ibmvnic_get_link(struct net_device *netdev)
2074 {
2075         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2076
2077         /* Don't need to send a query because we request a logical link up at
2078          * init and then we wait for link state indications
2079          */
2080         return adapter->logical_link_state;
2081 }
2082
2083 static void ibmvnic_get_ringparam(struct net_device *netdev,
2084                                   struct ethtool_ringparam *ring)
2085 {
2086         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2087
2088         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2089         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2090         ring->rx_mini_max_pending = 0;
2091         ring->rx_jumbo_max_pending = 0;
2092         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2093         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2094         ring->rx_mini_pending = 0;
2095         ring->rx_jumbo_pending = 0;
2096 }
2097
2098 static int ibmvnic_set_ringparam(struct net_device *netdev,
2099                                  struct ethtool_ringparam *ring)
2100 {
2101         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2102
2103         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2104             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2105                 netdev_err(netdev, "Invalid request.\n");
2106                 netdev_err(netdev, "Max tx buffers = %llu\n",
2107                            adapter->max_rx_add_entries_per_subcrq);
2108                 netdev_err(netdev, "Max rx buffers = %llu\n",
2109                            adapter->max_tx_entries_per_subcrq);
2110                 return -EINVAL;
2111         }
2112
2113         adapter->desired.rx_entries = ring->rx_pending;
2114         adapter->desired.tx_entries = ring->tx_pending;
2115
2116         return wait_for_reset(adapter);
2117 }
2118
2119 static void ibmvnic_get_channels(struct net_device *netdev,
2120                                  struct ethtool_channels *channels)
2121 {
2122         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2123
2124         channels->max_rx = adapter->max_rx_queues;
2125         channels->max_tx = adapter->max_tx_queues;
2126         channels->max_other = 0;
2127         channels->max_combined = 0;
2128         channels->rx_count = adapter->req_rx_queues;
2129         channels->tx_count = adapter->req_tx_queues;
2130         channels->other_count = 0;
2131         channels->combined_count = 0;
2132 }
2133
2134 static int ibmvnic_set_channels(struct net_device *netdev,
2135                                 struct ethtool_channels *channels)
2136 {
2137         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2138
2139         adapter->desired.rx_queues = channels->rx_count;
2140         adapter->desired.tx_queues = channels->tx_count;
2141
2142         return wait_for_reset(adapter);
2143 }
2144
2145 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2146 {
2147         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2148         int i;
2149
2150         if (stringset != ETH_SS_STATS)
2151                 return;
2152
2153         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2154                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2155
2156         for (i = 0; i < adapter->req_tx_queues; i++) {
2157                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2158                 data += ETH_GSTRING_LEN;
2159
2160                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2161                 data += ETH_GSTRING_LEN;
2162
2163                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2164                 data += ETH_GSTRING_LEN;
2165         }
2166
2167         for (i = 0; i < adapter->req_rx_queues; i++) {
2168                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2169                 data += ETH_GSTRING_LEN;
2170
2171                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2172                 data += ETH_GSTRING_LEN;
2173
2174                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2175                 data += ETH_GSTRING_LEN;
2176         }
2177 }
2178
2179 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2180 {
2181         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2182
2183         switch (sset) {
2184         case ETH_SS_STATS:
2185                 return ARRAY_SIZE(ibmvnic_stats) +
2186                        adapter->req_tx_queues * NUM_TX_STATS +
2187                        adapter->req_rx_queues * NUM_RX_STATS;
2188         default:
2189                 return -EOPNOTSUPP;
2190         }
2191 }
2192
2193 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2194                                       struct ethtool_stats *stats, u64 *data)
2195 {
2196         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2197         union ibmvnic_crq crq;
2198         int i, j;
2199
2200         memset(&crq, 0, sizeof(crq));
2201         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2202         crq.request_statistics.cmd = REQUEST_STATISTICS;
2203         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2204         crq.request_statistics.len =
2205             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2206
2207         /* Wait for data to be written */
2208         init_completion(&adapter->stats_done);
2209         ibmvnic_send_crq(adapter, &crq);
2210         wait_for_completion(&adapter->stats_done);
2211
2212         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2213                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2214                                                 ibmvnic_stats[i].offset));
2215
2216         for (j = 0; j < adapter->req_tx_queues; j++) {
2217                 data[i] = adapter->tx_stats_buffers[j].packets;
2218                 i++;
2219                 data[i] = adapter->tx_stats_buffers[j].bytes;
2220                 i++;
2221                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2222                 i++;
2223         }
2224
2225         for (j = 0; j < adapter->req_rx_queues; j++) {
2226                 data[i] = adapter->rx_stats_buffers[j].packets;
2227                 i++;
2228                 data[i] = adapter->rx_stats_buffers[j].bytes;
2229                 i++;
2230                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2231                 i++;
2232         }
2233 }
2234
2235 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2236         .get_drvinfo            = ibmvnic_get_drvinfo,
2237         .get_msglevel           = ibmvnic_get_msglevel,
2238         .set_msglevel           = ibmvnic_set_msglevel,
2239         .get_link               = ibmvnic_get_link,
2240         .get_ringparam          = ibmvnic_get_ringparam,
2241         .set_ringparam          = ibmvnic_set_ringparam,
2242         .get_channels           = ibmvnic_get_channels,
2243         .set_channels           = ibmvnic_set_channels,
2244         .get_strings            = ibmvnic_get_strings,
2245         .get_sset_count         = ibmvnic_get_sset_count,
2246         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2247         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2248 };
2249
2250 /* Routines for managing CRQs/sCRQs  */
2251
2252 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2253                                    struct ibmvnic_sub_crq_queue *scrq)
2254 {
2255         int rc;
2256
2257         if (scrq->irq) {
2258                 free_irq(scrq->irq, scrq);
2259                 irq_dispose_mapping(scrq->irq);
2260                 scrq->irq = 0;
2261         }
2262
2263         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2264         scrq->cur = 0;
2265
2266         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2267                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2268         return rc;
2269 }
2270
2271 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2272 {
2273         int i, rc;
2274
2275         for (i = 0; i < adapter->req_tx_queues; i++) {
2276                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2277                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2278                 if (rc)
2279                         return rc;
2280         }
2281
2282         for (i = 0; i < adapter->req_rx_queues; i++) {
2283                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2284                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2285                 if (rc)
2286                         return rc;
2287         }
2288
2289         return rc;
2290 }
2291
2292 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2293                                   struct ibmvnic_sub_crq_queue *scrq)
2294 {
2295         struct device *dev = &adapter->vdev->dev;
2296         long rc;
2297
2298         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2299
2300         /* Close the sub-crqs */
2301         do {
2302                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2303                                         adapter->vdev->unit_address,
2304                                         scrq->crq_num);
2305         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2306
2307         if (rc) {
2308                 netdev_err(adapter->netdev,
2309                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
2310                            scrq->crq_num, rc);
2311         }
2312
2313         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2314                          DMA_BIDIRECTIONAL);
2315         free_pages((unsigned long)scrq->msgs, 2);
2316         kfree(scrq);
2317 }
2318
2319 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2320                                                         *adapter)
2321 {
2322         struct device *dev = &adapter->vdev->dev;
2323         struct ibmvnic_sub_crq_queue *scrq;
2324         int rc;
2325
2326         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2327         if (!scrq)
2328                 return NULL;
2329
2330         scrq->msgs =
2331                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2332         if (!scrq->msgs) {
2333                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2334                 goto zero_page_failed;
2335         }
2336
2337         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2338                                          DMA_BIDIRECTIONAL);
2339         if (dma_mapping_error(dev, scrq->msg_token)) {
2340                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2341                 goto map_failed;
2342         }
2343
2344         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2345                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2346
2347         if (rc == H_RESOURCE)
2348                 rc = ibmvnic_reset_crq(adapter);
2349
2350         if (rc == H_CLOSED) {
2351                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2352         } else if (rc) {
2353                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2354                 goto reg_failed;
2355         }
2356
2357         scrq->adapter = adapter;
2358         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2359         spin_lock_init(&scrq->lock);
2360
2361         netdev_dbg(adapter->netdev,
2362                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2363                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2364
2365         return scrq;
2366
2367 reg_failed:
2368         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2369                          DMA_BIDIRECTIONAL);
2370 map_failed:
2371         free_pages((unsigned long)scrq->msgs, 2);
2372 zero_page_failed:
2373         kfree(scrq);
2374
2375         return NULL;
2376 }
2377
2378 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2379 {
2380         int i;
2381
2382         if (adapter->tx_scrq) {
2383                 for (i = 0; i < adapter->req_tx_queues; i++) {
2384                         if (!adapter->tx_scrq[i])
2385                                 continue;
2386
2387                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2388                                    i);
2389                         if (adapter->tx_scrq[i]->irq) {
2390                                 free_irq(adapter->tx_scrq[i]->irq,
2391                                          adapter->tx_scrq[i]);
2392                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2393                                 adapter->tx_scrq[i]->irq = 0;
2394                         }
2395
2396                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2397                 }
2398
2399                 kfree(adapter->tx_scrq);
2400                 adapter->tx_scrq = NULL;
2401         }
2402
2403         if (adapter->rx_scrq) {
2404                 for (i = 0; i < adapter->req_rx_queues; i++) {
2405                         if (!adapter->rx_scrq[i])
2406                                 continue;
2407
2408                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2409                                    i);
2410                         if (adapter->rx_scrq[i]->irq) {
2411                                 free_irq(adapter->rx_scrq[i]->irq,
2412                                          adapter->rx_scrq[i]);
2413                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2414                                 adapter->rx_scrq[i]->irq = 0;
2415                         }
2416
2417                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2418                 }
2419
2420                 kfree(adapter->rx_scrq);
2421                 adapter->rx_scrq = NULL;
2422         }
2423 }
2424
2425 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2426                             struct ibmvnic_sub_crq_queue *scrq)
2427 {
2428         struct device *dev = &adapter->vdev->dev;
2429         unsigned long rc;
2430
2431         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2432                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2433         if (rc)
2434                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2435                         scrq->hw_irq, rc);
2436         return rc;
2437 }
2438
2439 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2440                            struct ibmvnic_sub_crq_queue *scrq)
2441 {
2442         struct device *dev = &adapter->vdev->dev;
2443         unsigned long rc;
2444
2445         if (scrq->hw_irq > 0x100000000ULL) {
2446                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2447                 return 1;
2448         }
2449
2450         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2451                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2452         if (rc)
2453                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2454                         scrq->hw_irq, rc);
2455         return rc;
2456 }
2457
2458 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2459                                struct ibmvnic_sub_crq_queue *scrq)
2460 {
2461         struct device *dev = &adapter->vdev->dev;
2462         struct ibmvnic_tx_buff *txbuff;
2463         union sub_crq *next;
2464         int index;
2465         int i, j;
2466         u8 first;
2467
2468 restart_loop:
2469         while (pending_scrq(adapter, scrq)) {
2470                 unsigned int pool = scrq->pool_index;
2471
2472                 next = ibmvnic_next_scrq(adapter, scrq);
2473                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2474                         if (next->tx_comp.rcs[i]) {
2475                                 dev_err(dev, "tx error %x\n",
2476                                         next->tx_comp.rcs[i]);
2477                                 continue;
2478                         }
2479                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2480                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2481
2482                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2483                                 if (!txbuff->data_dma[j])
2484                                         continue;
2485
2486                                 txbuff->data_dma[j] = 0;
2487                         }
2488                         /* if sub_crq was sent indirectly */
2489                         first = txbuff->indir_arr[0].generic.first;
2490                         if (first == IBMVNIC_CRQ_CMD) {
2491                                 dma_unmap_single(dev, txbuff->indir_dma,
2492                                                  sizeof(txbuff->indir_arr),
2493                                                  DMA_TO_DEVICE);
2494                         }
2495
2496                         if (txbuff->last_frag) {
2497                                 dev_kfree_skb_any(txbuff->skb);
2498                                 txbuff->skb = NULL;
2499                         }
2500
2501                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2502                                                      producer_index] = index;
2503                         adapter->tx_pool[pool].producer_index =
2504                             (adapter->tx_pool[pool].producer_index + 1) %
2505                             adapter->req_tx_entries_per_subcrq;
2506                 }
2507                 /* remove tx_comp scrq*/
2508                 next->tx_comp.first = 0;
2509
2510                 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2511                     (adapter->req_tx_entries_per_subcrq / 2) &&
2512                     __netif_subqueue_stopped(adapter->netdev,
2513                                              scrq->pool_index)) {
2514                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2515                         netdev_info(adapter->netdev, "Started queue %d\n",
2516                                     scrq->pool_index);
2517                 }
2518         }
2519
2520         enable_scrq_irq(adapter, scrq);
2521
2522         if (pending_scrq(adapter, scrq)) {
2523                 disable_scrq_irq(adapter, scrq);
2524                 goto restart_loop;
2525         }
2526
2527         return 0;
2528 }
2529
2530 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2531 {
2532         struct ibmvnic_sub_crq_queue *scrq = instance;
2533         struct ibmvnic_adapter *adapter = scrq->adapter;
2534
2535         disable_scrq_irq(adapter, scrq);
2536         ibmvnic_complete_tx(adapter, scrq);
2537
2538         return IRQ_HANDLED;
2539 }
2540
2541 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2542 {
2543         struct ibmvnic_sub_crq_queue *scrq = instance;
2544         struct ibmvnic_adapter *adapter = scrq->adapter;
2545
2546         /* When booting a kdump kernel we can hit pending interrupts
2547          * prior to completing driver initialization.
2548          */
2549         if (unlikely(adapter->state != VNIC_OPEN))
2550                 return IRQ_NONE;
2551
2552         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2553
2554         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2555                 disable_scrq_irq(adapter, scrq);
2556                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2557         }
2558
2559         return IRQ_HANDLED;
2560 }
2561
2562 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2563 {
2564         struct device *dev = &adapter->vdev->dev;
2565         struct ibmvnic_sub_crq_queue *scrq;
2566         int i = 0, j = 0;
2567         int rc = 0;
2568
2569         for (i = 0; i < adapter->req_tx_queues; i++) {
2570                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2571                            i);
2572                 scrq = adapter->tx_scrq[i];
2573                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2574
2575                 if (!scrq->irq) {
2576                         rc = -EINVAL;
2577                         dev_err(dev, "Error mapping irq\n");
2578                         goto req_tx_irq_failed;
2579                 }
2580
2581                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2582                                  0, "ibmvnic_tx", scrq);
2583
2584                 if (rc) {
2585                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2586                                 scrq->irq, rc);
2587                         irq_dispose_mapping(scrq->irq);
2588                         goto req_rx_irq_failed;
2589                 }
2590         }
2591
2592         for (i = 0; i < adapter->req_rx_queues; i++) {
2593                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2594                            i);
2595                 scrq = adapter->rx_scrq[i];
2596                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2597                 if (!scrq->irq) {
2598                         rc = -EINVAL;
2599                         dev_err(dev, "Error mapping irq\n");
2600                         goto req_rx_irq_failed;
2601                 }
2602                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2603                                  0, "ibmvnic_rx", scrq);
2604                 if (rc) {
2605                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2606                                 scrq->irq, rc);
2607                         irq_dispose_mapping(scrq->irq);
2608                         goto req_rx_irq_failed;
2609                 }
2610         }
2611         return rc;
2612
2613 req_rx_irq_failed:
2614         for (j = 0; j < i; j++) {
2615                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2616                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2617         }
2618         i = adapter->req_tx_queues;
2619 req_tx_irq_failed:
2620         for (j = 0; j < i; j++) {
2621                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2622                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2623         }
2624         release_sub_crqs(adapter);
2625         return rc;
2626 }
2627
2628 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2629 {
2630         struct device *dev = &adapter->vdev->dev;
2631         struct ibmvnic_sub_crq_queue **allqueues;
2632         int registered_queues = 0;
2633         int total_queues;
2634         int more = 0;
2635         int i;
2636
2637         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2638
2639         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2640         if (!allqueues)
2641                 return -1;
2642
2643         for (i = 0; i < total_queues; i++) {
2644                 allqueues[i] = init_sub_crq_queue(adapter);
2645                 if (!allqueues[i]) {
2646                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2647                         break;
2648                 }
2649                 registered_queues++;
2650         }
2651
2652         /* Make sure we were able to register the minimum number of queues */
2653         if (registered_queues <
2654             adapter->min_tx_queues + adapter->min_rx_queues) {
2655                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2656                 goto tx_failed;
2657         }
2658
2659         /* Distribute the failed allocated queues*/
2660         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2661                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2662                 switch (i % 3) {
2663                 case 0:
2664                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2665                                 adapter->req_rx_queues--;
2666                         else
2667                                 more++;
2668                         break;
2669                 case 1:
2670                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2671                                 adapter->req_tx_queues--;
2672                         else
2673                                 more++;
2674                         break;
2675                 }
2676         }
2677
2678         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2679                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2680         if (!adapter->tx_scrq)
2681                 goto tx_failed;
2682
2683         for (i = 0; i < adapter->req_tx_queues; i++) {
2684                 adapter->tx_scrq[i] = allqueues[i];
2685                 adapter->tx_scrq[i]->pool_index = i;
2686         }
2687
2688         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2689                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2690         if (!adapter->rx_scrq)
2691                 goto rx_failed;
2692
2693         for (i = 0; i < adapter->req_rx_queues; i++) {
2694                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2695                 adapter->rx_scrq[i]->scrq_num = i;
2696         }
2697
2698         kfree(allqueues);
2699         return 0;
2700
2701 rx_failed:
2702         kfree(adapter->tx_scrq);
2703         adapter->tx_scrq = NULL;
2704 tx_failed:
2705         for (i = 0; i < registered_queues; i++)
2706                 release_sub_crq_queue(adapter, allqueues[i]);
2707         kfree(allqueues);
2708         return -1;
2709 }
2710
2711 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2712 {
2713         struct device *dev = &adapter->vdev->dev;
2714         union ibmvnic_crq crq;
2715         int max_entries;
2716
2717         if (!retry) {
2718                 /* Sub-CRQ entries are 32 byte long */
2719                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2720
2721                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2722                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2723                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2724                         return;
2725                 }
2726
2727                 if (adapter->desired.mtu)
2728                         adapter->req_mtu = adapter->desired.mtu;
2729                 else
2730                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2731
2732                 if (!adapter->desired.tx_entries)
2733                         adapter->desired.tx_entries =
2734                                         adapter->max_tx_entries_per_subcrq;
2735                 if (!adapter->desired.rx_entries)
2736                         adapter->desired.rx_entries =
2737                                         adapter->max_rx_add_entries_per_subcrq;
2738
2739                 max_entries = IBMVNIC_MAX_LTB_SIZE /
2740                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2741
2742                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2743                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2744                         adapter->desired.tx_entries = max_entries;
2745                 }
2746
2747                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2748                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2749                         adapter->desired.rx_entries = max_entries;
2750                 }
2751
2752                 if (adapter->desired.tx_entries)
2753                         adapter->req_tx_entries_per_subcrq =
2754                                         adapter->desired.tx_entries;
2755                 else
2756                         adapter->req_tx_entries_per_subcrq =
2757                                         adapter->max_tx_entries_per_subcrq;
2758
2759                 if (adapter->desired.rx_entries)
2760                         adapter->req_rx_add_entries_per_subcrq =
2761                                         adapter->desired.rx_entries;
2762                 else
2763                         adapter->req_rx_add_entries_per_subcrq =
2764                                         adapter->max_rx_add_entries_per_subcrq;
2765
2766                 if (adapter->desired.tx_queues)
2767                         adapter->req_tx_queues =
2768                                         adapter->desired.tx_queues;
2769                 else
2770                         adapter->req_tx_queues =
2771                                         adapter->opt_tx_comp_sub_queues;
2772
2773                 if (adapter->desired.rx_queues)
2774                         adapter->req_rx_queues =
2775                                         adapter->desired.rx_queues;
2776                 else
2777                         adapter->req_rx_queues =
2778                                         adapter->opt_rx_comp_queues;
2779
2780                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2781         }
2782
2783         memset(&crq, 0, sizeof(crq));
2784         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2785         crq.request_capability.cmd = REQUEST_CAPABILITY;
2786
2787         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2788         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2789         atomic_inc(&adapter->running_cap_crqs);
2790         ibmvnic_send_crq(adapter, &crq);
2791
2792         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2793         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2794         atomic_inc(&adapter->running_cap_crqs);
2795         ibmvnic_send_crq(adapter, &crq);
2796
2797         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2798         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2799         atomic_inc(&adapter->running_cap_crqs);
2800         ibmvnic_send_crq(adapter, &crq);
2801
2802         crq.request_capability.capability =
2803             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2804         crq.request_capability.number =
2805             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2806         atomic_inc(&adapter->running_cap_crqs);
2807         ibmvnic_send_crq(adapter, &crq);
2808
2809         crq.request_capability.capability =
2810             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2811         crq.request_capability.number =
2812             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2813         atomic_inc(&adapter->running_cap_crqs);
2814         ibmvnic_send_crq(adapter, &crq);
2815
2816         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2817         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2818         atomic_inc(&adapter->running_cap_crqs);
2819         ibmvnic_send_crq(adapter, &crq);
2820
2821         if (adapter->netdev->flags & IFF_PROMISC) {
2822                 if (adapter->promisc_supported) {
2823                         crq.request_capability.capability =
2824                             cpu_to_be16(PROMISC_REQUESTED);
2825                         crq.request_capability.number = cpu_to_be64(1);
2826                         atomic_inc(&adapter->running_cap_crqs);
2827                         ibmvnic_send_crq(adapter, &crq);
2828                 }
2829         } else {
2830                 crq.request_capability.capability =
2831                     cpu_to_be16(PROMISC_REQUESTED);
2832                 crq.request_capability.number = cpu_to_be64(0);
2833                 atomic_inc(&adapter->running_cap_crqs);
2834                 ibmvnic_send_crq(adapter, &crq);
2835         }
2836 }
2837
2838 static int pending_scrq(struct ibmvnic_adapter *adapter,
2839                         struct ibmvnic_sub_crq_queue *scrq)
2840 {
2841         union sub_crq *entry = &scrq->msgs[scrq->cur];
2842
2843         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2844                 return 1;
2845         else
2846                 return 0;
2847 }
2848
2849 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2850                                         struct ibmvnic_sub_crq_queue *scrq)
2851 {
2852         union sub_crq *entry;
2853         unsigned long flags;
2854
2855         spin_lock_irqsave(&scrq->lock, flags);
2856         entry = &scrq->msgs[scrq->cur];
2857         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2858                 if (++scrq->cur == scrq->size)
2859                         scrq->cur = 0;
2860         } else {
2861                 entry = NULL;
2862         }
2863         spin_unlock_irqrestore(&scrq->lock, flags);
2864
2865         return entry;
2866 }
2867
2868 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2869 {
2870         struct ibmvnic_crq_queue *queue = &adapter->crq;
2871         union ibmvnic_crq *crq;
2872
2873         crq = &queue->msgs[queue->cur];
2874         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2875                 if (++queue->cur == queue->size)
2876                         queue->cur = 0;
2877         } else {
2878                 crq = NULL;
2879         }
2880
2881         return crq;
2882 }
2883
2884 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2885                        union sub_crq *sub_crq)
2886 {
2887         unsigned int ua = adapter->vdev->unit_address;
2888         struct device *dev = &adapter->vdev->dev;
2889         u64 *u64_crq = (u64 *)sub_crq;
2890         int rc;
2891
2892         netdev_dbg(adapter->netdev,
2893                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2894                    (unsigned long int)cpu_to_be64(remote_handle),
2895                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2896                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2897                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2898                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2899
2900         /* Make sure the hypervisor sees the complete request */
2901         mb();
2902
2903         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2904                                 cpu_to_be64(remote_handle),
2905                                 cpu_to_be64(u64_crq[0]),
2906                                 cpu_to_be64(u64_crq[1]),
2907                                 cpu_to_be64(u64_crq[2]),
2908                                 cpu_to_be64(u64_crq[3]));
2909
2910         if (rc) {
2911                 if (rc == H_CLOSED)
2912                         dev_warn(dev, "CRQ Queue closed\n");
2913                 dev_err(dev, "Send error (rc=%d)\n", rc);
2914         }
2915
2916         return rc;
2917 }
2918
2919 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2920                                 u64 remote_handle, u64 ioba, u64 num_entries)
2921 {
2922         unsigned int ua = adapter->vdev->unit_address;
2923         struct device *dev = &adapter->vdev->dev;
2924         int rc;
2925
2926         /* Make sure the hypervisor sees the complete request */
2927         mb();
2928         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2929                                 cpu_to_be64(remote_handle),
2930                                 ioba, num_entries);
2931
2932         if (rc) {
2933                 if (rc == H_CLOSED)
2934                         dev_warn(dev, "CRQ Queue closed\n");
2935                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2936         }
2937
2938         return rc;
2939 }
2940
2941 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2942                             union ibmvnic_crq *crq)
2943 {
2944         unsigned int ua = adapter->vdev->unit_address;
2945         struct device *dev = &adapter->vdev->dev;
2946         u64 *u64_crq = (u64 *)crq;
2947         int rc;
2948
2949         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2950                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2951                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2952
2953         /* Make sure the hypervisor sees the complete request */
2954         mb();
2955
2956         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2957                                 cpu_to_be64(u64_crq[0]),
2958                                 cpu_to_be64(u64_crq[1]));
2959
2960         if (rc) {
2961                 if (rc == H_CLOSED) {
2962                         dev_warn(dev, "CRQ Queue closed\n");
2963                         if (adapter->resetting)
2964                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2965                 }
2966
2967                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2968         }
2969
2970         return rc;
2971 }
2972
2973 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2974 {
2975         union ibmvnic_crq crq;
2976
2977         memset(&crq, 0, sizeof(crq));
2978         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2979         crq.generic.cmd = IBMVNIC_CRQ_INIT;
2980         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2981
2982         return ibmvnic_send_crq(adapter, &crq);
2983 }
2984
2985 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2986 {
2987         union ibmvnic_crq crq;
2988
2989         memset(&crq, 0, sizeof(crq));
2990         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2991         crq.version_exchange.cmd = VERSION_EXCHANGE;
2992         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2993
2994         return ibmvnic_send_crq(adapter, &crq);
2995 }
2996
2997 struct vnic_login_client_data {
2998         u8      type;
2999         __be16  len;
3000         char    name;
3001 } __packed;
3002
3003 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3004 {
3005         int len;
3006
3007         /* Calculate the amount of buffer space needed for the
3008          * vnic client data in the login buffer. There are four entries,
3009          * OS name, LPAR name, device name, and a null last entry.
3010          */
3011         len = 4 * sizeof(struct vnic_login_client_data);
3012         len += 6; /* "Linux" plus NULL */
3013         len += strlen(utsname()->nodename) + 1;
3014         len += strlen(adapter->netdev->name) + 1;
3015
3016         return len;
3017 }
3018
3019 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3020                                  struct vnic_login_client_data *vlcd)
3021 {
3022         const char *os_name = "Linux";
3023         int len;
3024
3025         /* Type 1 - LPAR OS */
3026         vlcd->type = 1;
3027         len = strlen(os_name) + 1;
3028         vlcd->len = cpu_to_be16(len);
3029         strncpy(&vlcd->name, os_name, len);
3030         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3031
3032         /* Type 2 - LPAR name */
3033         vlcd->type = 2;
3034         len = strlen(utsname()->nodename) + 1;
3035         vlcd->len = cpu_to_be16(len);
3036         strncpy(&vlcd->name, utsname()->nodename, len);
3037         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3038
3039         /* Type 3 - device name */
3040         vlcd->type = 3;
3041         len = strlen(adapter->netdev->name) + 1;
3042         vlcd->len = cpu_to_be16(len);
3043         strncpy(&vlcd->name, adapter->netdev->name, len);
3044 }
3045
3046 static void send_login(struct ibmvnic_adapter *adapter)
3047 {
3048         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3049         struct ibmvnic_login_buffer *login_buffer;
3050         struct device *dev = &adapter->vdev->dev;
3051         dma_addr_t rsp_buffer_token;
3052         dma_addr_t buffer_token;
3053         size_t rsp_buffer_size;
3054         union ibmvnic_crq crq;
3055         size_t buffer_size;
3056         __be64 *tx_list_p;
3057         __be64 *rx_list_p;
3058         int client_data_len;
3059         struct vnic_login_client_data *vlcd;
3060         int i;
3061
3062         release_login_rsp_buffer(adapter);
3063         client_data_len = vnic_client_data_len(adapter);
3064
3065         buffer_size =
3066             sizeof(struct ibmvnic_login_buffer) +
3067             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3068             client_data_len;
3069
3070         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3071         if (!login_buffer)
3072                 goto buf_alloc_failed;
3073
3074         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3075                                       DMA_TO_DEVICE);
3076         if (dma_mapping_error(dev, buffer_token)) {
3077                 dev_err(dev, "Couldn't map login buffer\n");
3078                 goto buf_map_failed;
3079         }
3080
3081         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3082                           sizeof(u64) * adapter->req_tx_queues +
3083                           sizeof(u64) * adapter->req_rx_queues +
3084                           sizeof(u64) * adapter->req_rx_queues +
3085                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3086
3087         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3088         if (!login_rsp_buffer)
3089                 goto buf_rsp_alloc_failed;
3090
3091         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3092                                           rsp_buffer_size, DMA_FROM_DEVICE);
3093         if (dma_mapping_error(dev, rsp_buffer_token)) {
3094                 dev_err(dev, "Couldn't map login rsp buffer\n");
3095                 goto buf_rsp_map_failed;
3096         }
3097
3098         adapter->login_buf = login_buffer;
3099         adapter->login_buf_token = buffer_token;
3100         adapter->login_buf_sz = buffer_size;
3101         adapter->login_rsp_buf = login_rsp_buffer;
3102         adapter->login_rsp_buf_token = rsp_buffer_token;
3103         adapter->login_rsp_buf_sz = rsp_buffer_size;
3104
3105         login_buffer->len = cpu_to_be32(buffer_size);
3106         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3107         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3108         login_buffer->off_txcomp_subcrqs =
3109             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3110         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3111         login_buffer->off_rxcomp_subcrqs =
3112             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3113                         sizeof(u64) * adapter->req_tx_queues);
3114         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3115         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3116
3117         tx_list_p = (__be64 *)((char *)login_buffer +
3118                                       sizeof(struct ibmvnic_login_buffer));
3119         rx_list_p = (__be64 *)((char *)login_buffer +
3120                                       sizeof(struct ibmvnic_login_buffer) +
3121                                       sizeof(u64) * adapter->req_tx_queues);
3122
3123         for (i = 0; i < adapter->req_tx_queues; i++) {
3124                 if (adapter->tx_scrq[i]) {
3125                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3126                                                    crq_num);
3127                 }
3128         }
3129
3130         for (i = 0; i < adapter->req_rx_queues; i++) {
3131                 if (adapter->rx_scrq[i]) {
3132                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3133                                                    crq_num);
3134                 }
3135         }
3136
3137         /* Insert vNIC login client data */
3138         vlcd = (struct vnic_login_client_data *)
3139                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3140         login_buffer->client_data_offset =
3141                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3142         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3143
3144         vnic_add_client_data(adapter, vlcd);
3145
3146         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3147         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3148                 netdev_dbg(adapter->netdev, "%016lx\n",
3149                            ((unsigned long int *)(adapter->login_buf))[i]);
3150         }
3151
3152         memset(&crq, 0, sizeof(crq));
3153         crq.login.first = IBMVNIC_CRQ_CMD;
3154         crq.login.cmd = LOGIN;
3155         crq.login.ioba = cpu_to_be32(buffer_token);
3156         crq.login.len = cpu_to_be32(buffer_size);
3157         ibmvnic_send_crq(adapter, &crq);
3158
3159         return;
3160
3161 buf_rsp_map_failed:
3162         kfree(login_rsp_buffer);
3163 buf_rsp_alloc_failed:
3164         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3165 buf_map_failed:
3166         kfree(login_buffer);
3167 buf_alloc_failed:
3168         return;
3169 }
3170
3171 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3172                              u32 len, u8 map_id)
3173 {
3174         union ibmvnic_crq crq;
3175
3176         memset(&crq, 0, sizeof(crq));
3177         crq.request_map.first = IBMVNIC_CRQ_CMD;
3178         crq.request_map.cmd = REQUEST_MAP;
3179         crq.request_map.map_id = map_id;
3180         crq.request_map.ioba = cpu_to_be32(addr);
3181         crq.request_map.len = cpu_to_be32(len);
3182         ibmvnic_send_crq(adapter, &crq);
3183 }
3184
3185 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3186 {
3187         union ibmvnic_crq crq;
3188
3189         memset(&crq, 0, sizeof(crq));
3190         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3191         crq.request_unmap.cmd = REQUEST_UNMAP;
3192         crq.request_unmap.map_id = map_id;
3193         ibmvnic_send_crq(adapter, &crq);
3194 }
3195
3196 static void send_map_query(struct ibmvnic_adapter *adapter)
3197 {
3198         union ibmvnic_crq crq;
3199
3200         memset(&crq, 0, sizeof(crq));
3201         crq.query_map.first = IBMVNIC_CRQ_CMD;
3202         crq.query_map.cmd = QUERY_MAP;
3203         ibmvnic_send_crq(adapter, &crq);
3204 }
3205
3206 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3207 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3208 {
3209         union ibmvnic_crq crq;
3210
3211         atomic_set(&adapter->running_cap_crqs, 0);
3212         memset(&crq, 0, sizeof(crq));
3213         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3214         crq.query_capability.cmd = QUERY_CAPABILITY;
3215
3216         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3217         atomic_inc(&adapter->running_cap_crqs);
3218         ibmvnic_send_crq(adapter, &crq);
3219
3220         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3221         atomic_inc(&adapter->running_cap_crqs);
3222         ibmvnic_send_crq(adapter, &crq);
3223
3224         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3225         atomic_inc(&adapter->running_cap_crqs);
3226         ibmvnic_send_crq(adapter, &crq);
3227
3228         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3229         atomic_inc(&adapter->running_cap_crqs);
3230         ibmvnic_send_crq(adapter, &crq);
3231
3232         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3233         atomic_inc(&adapter->running_cap_crqs);
3234         ibmvnic_send_crq(adapter, &crq);
3235
3236         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3237         atomic_inc(&adapter->running_cap_crqs);
3238         ibmvnic_send_crq(adapter, &crq);
3239
3240         crq.query_capability.capability =
3241             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3242         atomic_inc(&adapter->running_cap_crqs);
3243         ibmvnic_send_crq(adapter, &crq);
3244
3245         crq.query_capability.capability =
3246             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3247         atomic_inc(&adapter->running_cap_crqs);
3248         ibmvnic_send_crq(adapter, &crq);
3249
3250         crq.query_capability.capability =
3251             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3252         atomic_inc(&adapter->running_cap_crqs);
3253         ibmvnic_send_crq(adapter, &crq);
3254
3255         crq.query_capability.capability =
3256             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3257         atomic_inc(&adapter->running_cap_crqs);
3258         ibmvnic_send_crq(adapter, &crq);
3259
3260         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3261         atomic_inc(&adapter->running_cap_crqs);
3262         ibmvnic_send_crq(adapter, &crq);
3263
3264         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3265         atomic_inc(&adapter->running_cap_crqs);
3266         ibmvnic_send_crq(adapter, &crq);
3267
3268         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3269         atomic_inc(&adapter->running_cap_crqs);
3270         ibmvnic_send_crq(adapter, &crq);
3271
3272         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3273         atomic_inc(&adapter->running_cap_crqs);
3274         ibmvnic_send_crq(adapter, &crq);
3275
3276         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3277         atomic_inc(&adapter->running_cap_crqs);
3278         ibmvnic_send_crq(adapter, &crq);
3279
3280         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3281         atomic_inc(&adapter->running_cap_crqs);
3282         ibmvnic_send_crq(adapter, &crq);
3283
3284         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3285         atomic_inc(&adapter->running_cap_crqs);
3286         ibmvnic_send_crq(adapter, &crq);
3287
3288         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3289         atomic_inc(&adapter->running_cap_crqs);
3290         ibmvnic_send_crq(adapter, &crq);
3291
3292         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3293         atomic_inc(&adapter->running_cap_crqs);
3294         ibmvnic_send_crq(adapter, &crq);
3295
3296         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3297         atomic_inc(&adapter->running_cap_crqs);
3298         ibmvnic_send_crq(adapter, &crq);
3299
3300         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3301         atomic_inc(&adapter->running_cap_crqs);
3302         ibmvnic_send_crq(adapter, &crq);
3303
3304         crq.query_capability.capability =
3305                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3306         atomic_inc(&adapter->running_cap_crqs);
3307         ibmvnic_send_crq(adapter, &crq);
3308
3309         crq.query_capability.capability =
3310                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3311         atomic_inc(&adapter->running_cap_crqs);
3312         ibmvnic_send_crq(adapter, &crq);
3313
3314         crq.query_capability.capability =
3315                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3316         atomic_inc(&adapter->running_cap_crqs);
3317         ibmvnic_send_crq(adapter, &crq);
3318
3319         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3320         atomic_inc(&adapter->running_cap_crqs);
3321         ibmvnic_send_crq(adapter, &crq);
3322 }
3323
3324 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3325                                 struct ibmvnic_adapter *adapter)
3326 {
3327         struct device *dev = &adapter->vdev->dev;
3328
3329         if (crq->get_vpd_size_rsp.rc.code) {
3330                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3331                         crq->get_vpd_size_rsp.rc.code);
3332                 complete(&adapter->fw_done);
3333                 return;
3334         }
3335
3336         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3337         complete(&adapter->fw_done);
3338 }
3339
3340 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3341                            struct ibmvnic_adapter *adapter)
3342 {
3343         struct device *dev = &adapter->vdev->dev;
3344         unsigned char *substr = NULL;
3345         u8 fw_level_len = 0;
3346
3347         memset(adapter->fw_version, 0, 32);
3348
3349         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3350                          DMA_FROM_DEVICE);
3351
3352         if (crq->get_vpd_rsp.rc.code) {
3353                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3354                         crq->get_vpd_rsp.rc.code);
3355                 goto complete;
3356         }
3357
3358         /* get the position of the firmware version info
3359          * located after the ASCII 'RM' substring in the buffer
3360          */
3361         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3362         if (!substr) {
3363                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3364                 goto complete;
3365         }
3366
3367         /* get length of firmware level ASCII substring */
3368         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3369                 fw_level_len = *(substr + 2);
3370         } else {
3371                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3372                 goto complete;
3373         }
3374
3375         /* copy firmware version string from vpd into adapter */
3376         if ((substr + 3 + fw_level_len) <
3377             (adapter->vpd->buff + adapter->vpd->len)) {
3378                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3379         } else {
3380                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3381         }
3382
3383 complete:
3384         if (adapter->fw_version[0] == '\0')
3385                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3386         complete(&adapter->fw_done);
3387 }
3388
3389 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3390 {
3391         struct device *dev = &adapter->vdev->dev;
3392         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3393         union ibmvnic_crq crq;
3394         int i;
3395
3396         dma_unmap_single(dev, adapter->ip_offload_tok,
3397                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3398
3399         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3400         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3401                 netdev_dbg(adapter->netdev, "%016lx\n",
3402                            ((unsigned long int *)(buf))[i]);
3403
3404         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3405         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3406         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3407                    buf->tcp_ipv4_chksum);
3408         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3409                    buf->tcp_ipv6_chksum);
3410         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3411                    buf->udp_ipv4_chksum);
3412         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3413                    buf->udp_ipv6_chksum);
3414         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3415                    buf->large_tx_ipv4);
3416         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3417                    buf->large_tx_ipv6);
3418         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3419                    buf->large_rx_ipv4);
3420         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3421                    buf->large_rx_ipv6);
3422         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3423                    buf->max_ipv4_header_size);
3424         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3425                    buf->max_ipv6_header_size);
3426         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3427                    buf->max_tcp_header_size);
3428         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3429                    buf->max_udp_header_size);
3430         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3431                    buf->max_large_tx_size);
3432         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3433                    buf->max_large_rx_size);
3434         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3435                    buf->ipv6_extension_header);
3436         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3437                    buf->tcp_pseudosum_req);
3438         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3439                    buf->num_ipv6_ext_headers);
3440         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3441                    buf->off_ipv6_ext_headers);
3442
3443         adapter->ip_offload_ctrl_tok =
3444             dma_map_single(dev, &adapter->ip_offload_ctrl,
3445                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3446
3447         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3448                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3449                 return;
3450         }
3451
3452         adapter->ip_offload_ctrl.len =
3453             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3454         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3455         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3456         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3457         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3458         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3459         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3460         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3461         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3462         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3463
3464         /* large_rx disabled for now, additional features needed */
3465         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3466         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3467
3468         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3469
3470         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3471                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3472
3473         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3474                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3475
3476         if ((adapter->netdev->features &
3477             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3478                 adapter->netdev->features |= NETIF_F_RXCSUM;
3479
3480         if (buf->large_tx_ipv4)
3481                 adapter->netdev->features |= NETIF_F_TSO;
3482         if (buf->large_tx_ipv6)
3483                 adapter->netdev->features |= NETIF_F_TSO6;
3484
3485         adapter->netdev->hw_features |= adapter->netdev->features;
3486
3487         memset(&crq, 0, sizeof(crq));
3488         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3489         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3490         crq.control_ip_offload.len =
3491             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3492         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3493         ibmvnic_send_crq(adapter, &crq);
3494 }
3495
3496 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3497                                   struct ibmvnic_adapter *adapter)
3498 {
3499         struct device *dev = &adapter->vdev->dev;
3500         struct ibmvnic_error_buff *error_buff, *tmp;
3501         unsigned long flags;
3502         bool found = false;
3503         int i;
3504
3505         if (!crq->request_error_rsp.rc.code) {
3506                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3507                          crq->request_error_rsp.rc.code);
3508                 return;
3509         }
3510
3511         spin_lock_irqsave(&adapter->error_list_lock, flags);
3512         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3513                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3514                         found = true;
3515                         list_del(&error_buff->list);
3516                         break;
3517                 }
3518         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3519
3520         if (!found) {
3521                 dev_err(dev, "Couldn't find error id %x\n",
3522                         be32_to_cpu(crq->request_error_rsp.error_id));
3523                 return;
3524         }
3525
3526         dev_err(dev, "Detailed info for error id %x:",
3527                 be32_to_cpu(crq->request_error_rsp.error_id));
3528
3529         for (i = 0; i < error_buff->len; i++) {
3530                 pr_cont("%02x", (int)error_buff->buff[i]);
3531                 if (i % 8 == 7)
3532                         pr_cont(" ");
3533         }
3534         pr_cont("\n");
3535
3536         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3537                          DMA_FROM_DEVICE);
3538         kfree(error_buff->buff);
3539         kfree(error_buff);
3540 }
3541
3542 static void request_error_information(struct ibmvnic_adapter *adapter,
3543                                       union ibmvnic_crq *err_crq)
3544 {
3545         struct device *dev = &adapter->vdev->dev;
3546         struct net_device *netdev = adapter->netdev;
3547         struct ibmvnic_error_buff *error_buff;
3548         unsigned long timeout = msecs_to_jiffies(30000);
3549         union ibmvnic_crq crq;
3550         unsigned long flags;
3551         int rc, detail_len;
3552
3553         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3554         if (!error_buff)
3555                 return;
3556
3557         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3558         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3559         if (!error_buff->buff) {
3560                 kfree(error_buff);
3561                 return;
3562         }
3563
3564         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3565                                          DMA_FROM_DEVICE);
3566         if (dma_mapping_error(dev, error_buff->dma)) {
3567                 netdev_err(netdev, "Couldn't map error buffer\n");
3568                 kfree(error_buff->buff);
3569                 kfree(error_buff);
3570                 return;
3571         }
3572
3573         error_buff->len = detail_len;
3574         error_buff->error_id = err_crq->error_indication.error_id;
3575
3576         spin_lock_irqsave(&adapter->error_list_lock, flags);
3577         list_add_tail(&error_buff->list, &adapter->errors);
3578         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3579
3580         memset(&crq, 0, sizeof(crq));
3581         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3582         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3583         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3584         crq.request_error_info.len = cpu_to_be32(detail_len);
3585         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3586
3587         rc = ibmvnic_send_crq(adapter, &crq);
3588         if (rc) {
3589                 netdev_err(netdev, "failed to request error information\n");
3590                 goto err_info_fail;
3591         }
3592
3593         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3594                 netdev_err(netdev, "timeout waiting for error information\n");
3595                 goto err_info_fail;
3596         }
3597
3598         return;
3599
3600 err_info_fail:
3601         spin_lock_irqsave(&adapter->error_list_lock, flags);
3602         list_del(&error_buff->list);
3603         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3604
3605         kfree(error_buff->buff);
3606         kfree(error_buff);
3607 }
3608
3609 static void handle_error_indication(union ibmvnic_crq *crq,
3610                                     struct ibmvnic_adapter *adapter)
3611 {
3612         struct device *dev = &adapter->vdev->dev;
3613
3614         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3615                 crq->error_indication.flags
3616                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3617                 be32_to_cpu(crq->error_indication.error_id),
3618                 be16_to_cpu(crq->error_indication.error_cause));
3619
3620         if (be32_to_cpu(crq->error_indication.error_id))
3621                 request_error_information(adapter, crq);
3622
3623         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3624                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3625         else
3626                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3627 }
3628
3629 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3630                                  struct ibmvnic_adapter *adapter)
3631 {
3632         struct net_device *netdev = adapter->netdev;
3633         struct device *dev = &adapter->vdev->dev;
3634         long rc;
3635
3636         rc = crq->change_mac_addr_rsp.rc.code;
3637         if (rc) {
3638                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3639                 goto out;
3640         }
3641         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3642                ETH_ALEN);
3643 out:
3644         complete(&adapter->fw_done);
3645         return rc;
3646 }
3647
3648 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3649                                    struct ibmvnic_adapter *adapter)
3650 {
3651         struct device *dev = &adapter->vdev->dev;
3652         u64 *req_value;
3653         char *name;
3654
3655         atomic_dec(&adapter->running_cap_crqs);
3656         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3657         case REQ_TX_QUEUES:
3658                 req_value = &adapter->req_tx_queues;
3659                 name = "tx";
3660                 break;
3661         case REQ_RX_QUEUES:
3662                 req_value = &adapter->req_rx_queues;
3663                 name = "rx";
3664                 break;
3665         case REQ_RX_ADD_QUEUES:
3666                 req_value = &adapter->req_rx_add_queues;
3667                 name = "rx_add";
3668                 break;
3669         case REQ_TX_ENTRIES_PER_SUBCRQ:
3670                 req_value = &adapter->req_tx_entries_per_subcrq;
3671                 name = "tx_entries_per_subcrq";
3672                 break;
3673         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3674                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3675                 name = "rx_add_entries_per_subcrq";
3676                 break;
3677         case REQ_MTU:
3678                 req_value = &adapter->req_mtu;
3679                 name = "mtu";
3680                 break;
3681         case PROMISC_REQUESTED:
3682                 req_value = &adapter->promisc;
3683                 name = "promisc";
3684                 break;
3685         default:
3686                 dev_err(dev, "Got invalid cap request rsp %d\n",
3687                         crq->request_capability.capability);
3688                 return;
3689         }
3690
3691         switch (crq->request_capability_rsp.rc.code) {
3692         case SUCCESS:
3693                 break;
3694         case PARTIALSUCCESS:
3695                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3696                          *req_value,
3697                          (long int)be64_to_cpu(crq->request_capability_rsp.
3698                                                number), name);
3699
3700                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3701                     REQ_MTU) {
3702                         pr_err("mtu of %llu is not supported. Reverting.\n",
3703                                *req_value);
3704                         *req_value = adapter->fallback.mtu;
3705                 } else {
3706                         *req_value =
3707                                 be64_to_cpu(crq->request_capability_rsp.number);
3708                 }
3709
3710                 ibmvnic_send_req_caps(adapter, 1);
3711                 return;
3712         default:
3713                 dev_err(dev, "Error %d in request cap rsp\n",
3714                         crq->request_capability_rsp.rc.code);
3715                 return;
3716         }
3717
3718         /* Done receiving requested capabilities, query IP offload support */
3719         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3720                 union ibmvnic_crq newcrq;
3721                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3722                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3723                     &adapter->ip_offload_buf;
3724
3725                 adapter->wait_capability = false;
3726                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3727                                                          buf_sz,
3728                                                          DMA_FROM_DEVICE);
3729
3730                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3731                         if (!firmware_has_feature(FW_FEATURE_CMO))
3732                                 dev_err(dev, "Couldn't map offload buffer\n");
3733                         return;
3734                 }
3735
3736                 memset(&newcrq, 0, sizeof(newcrq));
3737                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3738                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3739                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3740                 newcrq.query_ip_offload.ioba =
3741                     cpu_to_be32(adapter->ip_offload_tok);
3742
3743                 ibmvnic_send_crq(adapter, &newcrq);
3744         }
3745 }
3746
3747 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3748                             struct ibmvnic_adapter *adapter)
3749 {
3750         struct device *dev = &adapter->vdev->dev;
3751         struct net_device *netdev = adapter->netdev;
3752         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3753         struct ibmvnic_login_buffer *login = adapter->login_buf;
3754         int i;
3755
3756         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3757                          DMA_BIDIRECTIONAL);
3758         release_login_buffer(adapter);
3759         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3760                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3761
3762         /* If the number of queues requested can't be allocated by the
3763          * server, the login response will return with code 1. We will need
3764          * to resend the login buffer with fewer queues requested.
3765          */
3766         if (login_rsp_crq->generic.rc.code) {
3767                 adapter->renegotiate = true;
3768                 complete(&adapter->init_done);
3769                 return 0;
3770         }
3771
3772         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3773
3774         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3775         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3776                 netdev_dbg(adapter->netdev, "%016lx\n",
3777                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3778         }
3779
3780         /* Sanity checks */
3781         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3782             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3783              adapter->req_rx_add_queues !=
3784              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3785                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3786                 ibmvnic_remove(adapter->vdev);
3787                 return -EIO;
3788         }
3789         complete(&adapter->init_done);
3790
3791         return 0;
3792 }
3793
3794 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3795                                      struct ibmvnic_adapter *adapter)
3796 {
3797         struct device *dev = &adapter->vdev->dev;
3798         long rc;
3799
3800         rc = crq->request_unmap_rsp.rc.code;
3801         if (rc)
3802                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3803 }
3804
3805 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3806                                  struct ibmvnic_adapter *adapter)
3807 {
3808         struct net_device *netdev = adapter->netdev;
3809         struct device *dev = &adapter->vdev->dev;
3810         long rc;
3811
3812         rc = crq->query_map_rsp.rc.code;
3813         if (rc) {
3814                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3815                 return;
3816         }
3817         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3818                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3819                    crq->query_map_rsp.free_pages);
3820 }
3821
3822 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3823                                  struct ibmvnic_adapter *adapter)
3824 {
3825         struct net_device *netdev = adapter->netdev;
3826         struct device *dev = &adapter->vdev->dev;
3827         long rc;
3828
3829         atomic_dec(&adapter->running_cap_crqs);
3830         netdev_dbg(netdev, "Outstanding queries: %d\n",
3831                    atomic_read(&adapter->running_cap_crqs));
3832         rc = crq->query_capability.rc.code;
3833         if (rc) {
3834                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3835                 goto out;
3836         }
3837
3838         switch (be16_to_cpu(crq->query_capability.capability)) {
3839         case MIN_TX_QUEUES:
3840                 adapter->min_tx_queues =
3841                     be64_to_cpu(crq->query_capability.number);
3842                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3843                            adapter->min_tx_queues);
3844                 break;
3845         case MIN_RX_QUEUES:
3846                 adapter->min_rx_queues =
3847                     be64_to_cpu(crq->query_capability.number);
3848                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3849                            adapter->min_rx_queues);
3850                 break;
3851         case MIN_RX_ADD_QUEUES:
3852                 adapter->min_rx_add_queues =
3853                     be64_to_cpu(crq->query_capability.number);
3854                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3855                            adapter->min_rx_add_queues);
3856                 break;
3857         case MAX_TX_QUEUES:
3858                 adapter->max_tx_queues =
3859                     be64_to_cpu(crq->query_capability.number);
3860                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3861                            adapter->max_tx_queues);
3862                 break;
3863         case MAX_RX_QUEUES:
3864                 adapter->max_rx_queues =
3865                     be64_to_cpu(crq->query_capability.number);
3866                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3867                            adapter->max_rx_queues);
3868                 break;
3869         case MAX_RX_ADD_QUEUES:
3870                 adapter->max_rx_add_queues =
3871                     be64_to_cpu(crq->query_capability.number);
3872                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3873                            adapter->max_rx_add_queues);
3874                 break;
3875         case MIN_TX_ENTRIES_PER_SUBCRQ:
3876                 adapter->min_tx_entries_per_subcrq =
3877                     be64_to_cpu(crq->query_capability.number);
3878                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3879                            adapter->min_tx_entries_per_subcrq);
3880                 break;
3881         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3882                 adapter->min_rx_add_entries_per_subcrq =
3883                     be64_to_cpu(crq->query_capability.number);
3884                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3885                            adapter->min_rx_add_entries_per_subcrq);
3886                 break;
3887         case MAX_TX_ENTRIES_PER_SUBCRQ:
3888                 adapter->max_tx_entries_per_subcrq =
3889                     be64_to_cpu(crq->query_capability.number);
3890                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3891                            adapter->max_tx_entries_per_subcrq);
3892                 break;
3893         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3894                 adapter->max_rx_add_entries_per_subcrq =
3895                     be64_to_cpu(crq->query_capability.number);
3896                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3897                            adapter->max_rx_add_entries_per_subcrq);
3898                 break;
3899         case TCP_IP_OFFLOAD:
3900                 adapter->tcp_ip_offload =
3901                     be64_to_cpu(crq->query_capability.number);
3902                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3903                            adapter->tcp_ip_offload);
3904                 break;
3905         case PROMISC_SUPPORTED:
3906                 adapter->promisc_supported =
3907                     be64_to_cpu(crq->query_capability.number);
3908                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3909                            adapter->promisc_supported);
3910                 break;
3911         case MIN_MTU:
3912                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3913                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3914                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3915                 break;
3916         case MAX_MTU:
3917                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3918                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3919                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3920                 break;
3921         case MAX_MULTICAST_FILTERS:
3922                 adapter->max_multicast_filters =
3923                     be64_to_cpu(crq->query_capability.number);
3924                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3925                            adapter->max_multicast_filters);
3926                 break;
3927         case VLAN_HEADER_INSERTION:
3928                 adapter->vlan_header_insertion =
3929                     be64_to_cpu(crq->query_capability.number);
3930                 if (adapter->vlan_header_insertion)
3931                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3932                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3933                            adapter->vlan_header_insertion);
3934                 break;
3935         case RX_VLAN_HEADER_INSERTION:
3936                 adapter->rx_vlan_header_insertion =
3937                     be64_to_cpu(crq->query_capability.number);
3938                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3939                            adapter->rx_vlan_header_insertion);
3940                 break;
3941         case MAX_TX_SG_ENTRIES:
3942                 adapter->max_tx_sg_entries =
3943                     be64_to_cpu(crq->query_capability.number);
3944                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3945                            adapter->max_tx_sg_entries);
3946                 break;
3947         case RX_SG_SUPPORTED:
3948                 adapter->rx_sg_supported =
3949                     be64_to_cpu(crq->query_capability.number);
3950                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3951                            adapter->rx_sg_supported);
3952                 break;
3953         case OPT_TX_COMP_SUB_QUEUES:
3954                 adapter->opt_tx_comp_sub_queues =
3955                     be64_to_cpu(crq->query_capability.number);
3956                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3957                            adapter->opt_tx_comp_sub_queues);
3958                 break;
3959         case OPT_RX_COMP_QUEUES:
3960                 adapter->opt_rx_comp_queues =
3961                     be64_to_cpu(crq->query_capability.number);
3962                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3963                            adapter->opt_rx_comp_queues);
3964                 break;
3965         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3966                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3967                     be64_to_cpu(crq->query_capability.number);
3968                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3969                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3970                 break;
3971         case OPT_TX_ENTRIES_PER_SUBCRQ:
3972                 adapter->opt_tx_entries_per_subcrq =
3973                     be64_to_cpu(crq->query_capability.number);
3974                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3975                            adapter->opt_tx_entries_per_subcrq);
3976                 break;
3977         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3978                 adapter->opt_rxba_entries_per_subcrq =
3979                     be64_to_cpu(crq->query_capability.number);
3980                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3981                            adapter->opt_rxba_entries_per_subcrq);
3982                 break;
3983         case TX_RX_DESC_REQ:
3984                 adapter->tx_rx_desc_req = crq->query_capability.number;
3985                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3986                            adapter->tx_rx_desc_req);
3987                 break;
3988
3989         default:
3990                 netdev_err(netdev, "Got invalid cap rsp %d\n",
3991                            crq->query_capability.capability);
3992         }
3993
3994 out:
3995         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3996                 adapter->wait_capability = false;
3997                 ibmvnic_send_req_caps(adapter, 0);
3998         }
3999 }
4000
4001 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4002                                struct ibmvnic_adapter *adapter)
4003 {
4004         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4005         struct net_device *netdev = adapter->netdev;
4006         struct device *dev = &adapter->vdev->dev;
4007         u64 *u64_crq = (u64 *)crq;
4008         long rc;
4009
4010         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4011                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4012                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4013         switch (gen_crq->first) {
4014         case IBMVNIC_CRQ_INIT_RSP:
4015                 switch (gen_crq->cmd) {
4016                 case IBMVNIC_CRQ_INIT:
4017                         dev_info(dev, "Partner initialized\n");
4018                         adapter->from_passive_init = true;
4019                         complete(&adapter->init_done);
4020                         break;
4021                 case IBMVNIC_CRQ_INIT_COMPLETE:
4022                         dev_info(dev, "Partner initialization complete\n");
4023                         send_version_xchg(adapter);
4024                         break;
4025                 default:
4026                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4027                 }
4028                 return;
4029         case IBMVNIC_CRQ_XPORT_EVENT:
4030                 netif_carrier_off(netdev);
4031                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4032                         dev_info(dev, "Migrated, re-enabling adapter\n");
4033                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4034                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4035                         dev_info(dev, "Backing device failover detected\n");
4036                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4037                 } else {
4038                         /* The adapter lost the connection */
4039                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4040                                 gen_crq->cmd);
4041                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4042                 }
4043                 return;
4044         case IBMVNIC_CRQ_CMD_RSP:
4045                 break;
4046         default:
4047                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4048                         gen_crq->first);
4049                 return;
4050         }
4051
4052         switch (gen_crq->cmd) {
4053         case VERSION_EXCHANGE_RSP:
4054                 rc = crq->version_exchange_rsp.rc.code;
4055                 if (rc) {
4056                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4057                         break;
4058                 }
4059                 dev_info(dev, "Partner protocol version is %d\n",
4060                          crq->version_exchange_rsp.version);
4061                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4062                     ibmvnic_version)
4063                         ibmvnic_version =
4064                             be16_to_cpu(crq->version_exchange_rsp.version);
4065                 send_cap_queries(adapter);
4066                 break;
4067         case QUERY_CAPABILITY_RSP:
4068                 handle_query_cap_rsp(crq, adapter);
4069                 break;
4070         case QUERY_MAP_RSP:
4071                 handle_query_map_rsp(crq, adapter);
4072                 break;
4073         case REQUEST_MAP_RSP:
4074                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4075                 complete(&adapter->fw_done);
4076                 break;
4077         case REQUEST_UNMAP_RSP:
4078                 handle_request_unmap_rsp(crq, adapter);
4079                 break;
4080         case REQUEST_CAPABILITY_RSP:
4081                 handle_request_cap_rsp(crq, adapter);
4082                 break;
4083         case LOGIN_RSP:
4084                 netdev_dbg(netdev, "Got Login Response\n");
4085                 handle_login_rsp(crq, adapter);
4086                 break;
4087         case LOGICAL_LINK_STATE_RSP:
4088                 netdev_dbg(netdev,
4089                            "Got Logical Link State Response, state: %d rc: %d\n",
4090                            crq->logical_link_state_rsp.link_state,
4091                            crq->logical_link_state_rsp.rc.code);
4092                 adapter->logical_link_state =
4093                     crq->logical_link_state_rsp.link_state;
4094                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4095                 complete(&adapter->init_done);
4096                 break;
4097         case LINK_STATE_INDICATION:
4098                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4099                 adapter->phys_link_state =
4100                     crq->link_state_indication.phys_link_state;
4101                 adapter->logical_link_state =
4102                     crq->link_state_indication.logical_link_state;
4103                 break;
4104         case CHANGE_MAC_ADDR_RSP:
4105                 netdev_dbg(netdev, "Got MAC address change Response\n");
4106                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4107                 break;
4108         case ERROR_INDICATION:
4109                 netdev_dbg(netdev, "Got Error Indication\n");
4110                 handle_error_indication(crq, adapter);
4111                 break;
4112         case REQUEST_ERROR_RSP:
4113                 netdev_dbg(netdev, "Got Error Detail Response\n");
4114                 handle_error_info_rsp(crq, adapter);
4115                 break;
4116         case REQUEST_STATISTICS_RSP:
4117                 netdev_dbg(netdev, "Got Statistics Response\n");
4118                 complete(&adapter->stats_done);
4119                 break;
4120         case QUERY_IP_OFFLOAD_RSP:
4121                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4122                 handle_query_ip_offload_rsp(adapter);
4123                 break;
4124         case MULTICAST_CTRL_RSP:
4125                 netdev_dbg(netdev, "Got multicast control Response\n");
4126                 break;
4127         case CONTROL_IP_OFFLOAD_RSP:
4128                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4129                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4130                                  sizeof(adapter->ip_offload_ctrl),
4131                                  DMA_TO_DEVICE);
4132                 complete(&adapter->init_done);
4133                 break;
4134         case COLLECT_FW_TRACE_RSP:
4135                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4136                 complete(&adapter->fw_done);
4137                 break;
4138         case GET_VPD_SIZE_RSP:
4139                 handle_vpd_size_rsp(crq, adapter);
4140                 break;
4141         case GET_VPD_RSP:
4142                 handle_vpd_rsp(crq, adapter);
4143                 break;
4144         default:
4145                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4146                            gen_crq->cmd);
4147         }
4148 }
4149
4150 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4151 {
4152         struct ibmvnic_adapter *adapter = instance;
4153
4154         tasklet_schedule(&adapter->tasklet);
4155         return IRQ_HANDLED;
4156 }
4157
4158 static void ibmvnic_tasklet(void *data)
4159 {
4160         struct ibmvnic_adapter *adapter = data;
4161         struct ibmvnic_crq_queue *queue = &adapter->crq;
4162         union ibmvnic_crq *crq;
4163         unsigned long flags;
4164         bool done = false;
4165
4166         spin_lock_irqsave(&queue->lock, flags);
4167         while (!done) {
4168                 /* Pull all the valid messages off the CRQ */
4169                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4170                         ibmvnic_handle_crq(crq, adapter);
4171                         crq->generic.first = 0;
4172                 }
4173
4174                 /* remain in tasklet until all
4175                  * capabilities responses are received
4176                  */
4177                 if (!adapter->wait_capability)
4178                         done = true;
4179         }
4180         /* if capabilities CRQ's were sent in this tasklet, the following
4181          * tasklet must wait until all responses are received
4182          */
4183         if (atomic_read(&adapter->running_cap_crqs) != 0)
4184                 adapter->wait_capability = true;
4185         spin_unlock_irqrestore(&queue->lock, flags);
4186 }
4187
4188 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4189 {
4190         struct vio_dev *vdev = adapter->vdev;
4191         int rc;
4192
4193         do {
4194                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4195         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4196
4197         if (rc)
4198                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4199
4200         return rc;
4201 }
4202
4203 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4204 {
4205         struct ibmvnic_crq_queue *crq = &adapter->crq;
4206         struct device *dev = &adapter->vdev->dev;
4207         struct vio_dev *vdev = adapter->vdev;
4208         int rc;
4209
4210         /* Close the CRQ */
4211         do {
4212                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4213         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4214
4215         /* Clean out the queue */
4216         memset(crq->msgs, 0, PAGE_SIZE);
4217         crq->cur = 0;
4218
4219         /* And re-open it again */
4220         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4221                                 crq->msg_token, PAGE_SIZE);
4222
4223         if (rc == H_CLOSED)
4224                 /* Adapter is good, but other end is not ready */
4225                 dev_warn(dev, "Partner adapter not ready\n");
4226         else if (rc != 0)
4227                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4228
4229         return rc;
4230 }
4231
4232 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4233 {
4234         struct ibmvnic_crq_queue *crq = &adapter->crq;
4235         struct vio_dev *vdev = adapter->vdev;
4236         long rc;
4237
4238         if (!crq->msgs)
4239                 return;
4240
4241         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4242         free_irq(vdev->irq, adapter);
4243         tasklet_kill(&adapter->tasklet);
4244         do {
4245                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4246         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4247
4248         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4249                          DMA_BIDIRECTIONAL);
4250         free_page((unsigned long)crq->msgs);
4251         crq->msgs = NULL;
4252 }
4253
4254 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4255 {
4256         struct ibmvnic_crq_queue *crq = &adapter->crq;
4257         struct device *dev = &adapter->vdev->dev;
4258         struct vio_dev *vdev = adapter->vdev;
4259         int rc, retrc = -ENOMEM;
4260
4261         if (crq->msgs)
4262                 return 0;
4263
4264         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4265         /* Should we allocate more than one page? */
4266
4267         if (!crq->msgs)
4268                 return -ENOMEM;
4269
4270         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4271         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4272                                         DMA_BIDIRECTIONAL);
4273         if (dma_mapping_error(dev, crq->msg_token))
4274                 goto map_failed;
4275
4276         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4277                                 crq->msg_token, PAGE_SIZE);
4278
4279         if (rc == H_RESOURCE)
4280                 /* maybe kexecing and resource is busy. try a reset */
4281                 rc = ibmvnic_reset_crq(adapter);
4282         retrc = rc;
4283
4284         if (rc == H_CLOSED) {
4285                 dev_warn(dev, "Partner adapter not ready\n");
4286         } else if (rc) {
4287                 dev_warn(dev, "Error %d opening adapter\n", rc);
4288                 goto reg_crq_failed;
4289         }
4290
4291         retrc = 0;
4292
4293         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4294                      (unsigned long)adapter);
4295
4296         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4297         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4298                          adapter);
4299         if (rc) {
4300                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4301                         vdev->irq, rc);
4302                 goto req_irq_failed;
4303         }
4304
4305         rc = vio_enable_interrupts(vdev);
4306         if (rc) {
4307                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4308                 goto req_irq_failed;
4309         }
4310
4311         crq->cur = 0;
4312         spin_lock_init(&crq->lock);
4313
4314         return retrc;
4315
4316 req_irq_failed:
4317         tasklet_kill(&adapter->tasklet);
4318         do {
4319                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4320         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4321 reg_crq_failed:
4322         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4323 map_failed:
4324         free_page((unsigned long)crq->msgs);
4325         crq->msgs = NULL;
4326         return retrc;
4327 }
4328
4329 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4330 {
4331         struct device *dev = &adapter->vdev->dev;
4332         unsigned long timeout = msecs_to_jiffies(30000);
4333         int rc;
4334
4335         if (adapter->resetting && !adapter->wait_for_reset) {
4336                 rc = ibmvnic_reset_crq(adapter);
4337                 if (!rc)
4338                         rc = vio_enable_interrupts(adapter->vdev);
4339         } else {
4340                 rc = init_crq_queue(adapter);
4341         }
4342
4343         if (rc) {
4344                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4345                 return rc;
4346         }
4347
4348         adapter->from_passive_init = false;
4349
4350         init_completion(&adapter->init_done);
4351         adapter->init_done_rc = 0;
4352         ibmvnic_send_crq_init(adapter);
4353         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4354                 dev_err(dev, "Initialization sequence timed out\n");
4355                 return -1;
4356         }
4357
4358         if (adapter->init_done_rc) {
4359                 release_crq_queue(adapter);
4360                 return adapter->init_done_rc;
4361         }
4362
4363         if (adapter->from_passive_init) {
4364                 adapter->state = VNIC_OPEN;
4365                 adapter->from_passive_init = false;
4366                 return -1;
4367         }
4368
4369         if (adapter->resetting && !adapter->wait_for_reset)
4370                 rc = reset_sub_crq_queues(adapter);
4371         else
4372                 rc = init_sub_crqs(adapter);
4373         if (rc) {
4374                 dev_err(dev, "Initialization of sub crqs failed\n");
4375                 release_crq_queue(adapter);
4376                 return rc;
4377         }
4378
4379         rc = init_sub_crq_irqs(adapter);
4380         if (rc) {
4381                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4382                 release_crq_queue(adapter);
4383         }
4384
4385         return rc;
4386 }
4387
4388 static struct device_attribute dev_attr_failover;
4389
4390 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4391 {
4392         struct ibmvnic_adapter *adapter;
4393         struct net_device *netdev;
4394         unsigned char *mac_addr_p;
4395         int rc;
4396
4397         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4398                 dev->unit_address);
4399
4400         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4401                                                         VETH_MAC_ADDR, NULL);
4402         if (!mac_addr_p) {
4403                 dev_err(&dev->dev,
4404                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4405                         __FILE__, __LINE__);
4406                 return 0;
4407         }
4408
4409         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4410                                    IBMVNIC_MAX_QUEUES);
4411         if (!netdev)
4412                 return -ENOMEM;
4413
4414         adapter = netdev_priv(netdev);
4415         adapter->state = VNIC_PROBING;
4416         dev_set_drvdata(&dev->dev, netdev);
4417         adapter->vdev = dev;
4418         adapter->netdev = netdev;
4419
4420         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4421         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4422         netdev->irq = dev->irq;
4423         netdev->netdev_ops = &ibmvnic_netdev_ops;
4424         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4425         SET_NETDEV_DEV(netdev, &dev->dev);
4426
4427         spin_lock_init(&adapter->stats_lock);
4428
4429         INIT_LIST_HEAD(&adapter->errors);
4430         spin_lock_init(&adapter->error_list_lock);
4431
4432         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4433         INIT_LIST_HEAD(&adapter->rwi_list);
4434         mutex_init(&adapter->reset_lock);
4435         mutex_init(&adapter->rwi_lock);
4436         adapter->resetting = false;
4437
4438         adapter->mac_change_pending = false;
4439
4440         do {
4441                 rc = ibmvnic_init(adapter);
4442                 if (rc && rc != EAGAIN)
4443                         goto ibmvnic_init_fail;
4444         } while (rc == EAGAIN);
4445
4446         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4447         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4448         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4449
4450         rc = device_create_file(&dev->dev, &dev_attr_failover);
4451         if (rc)
4452                 goto ibmvnic_init_fail;
4453
4454         netif_carrier_off(netdev);
4455         rc = register_netdev(netdev);
4456         if (rc) {
4457                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4458                 goto ibmvnic_register_fail;
4459         }
4460         dev_info(&dev->dev, "ibmvnic registered\n");
4461
4462         adapter->state = VNIC_PROBED;
4463
4464         adapter->wait_for_reset = false;
4465
4466         return 0;
4467
4468 ibmvnic_register_fail:
4469         device_remove_file(&dev->dev, &dev_attr_failover);
4470
4471 ibmvnic_init_fail:
4472         release_sub_crqs(adapter);
4473         release_crq_queue(adapter);
4474         free_netdev(netdev);
4475
4476         return rc;
4477 }
4478
4479 static int ibmvnic_remove(struct vio_dev *dev)
4480 {
4481         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4482         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4483
4484         adapter->state = VNIC_REMOVING;
4485         unregister_netdev(netdev);
4486         mutex_lock(&adapter->reset_lock);
4487
4488         release_resources(adapter);
4489         release_sub_crqs(adapter);
4490         release_crq_queue(adapter);
4491
4492         adapter->state = VNIC_REMOVED;
4493
4494         mutex_unlock(&adapter->reset_lock);
4495         device_remove_file(&dev->dev, &dev_attr_failover);
4496         free_netdev(netdev);
4497         dev_set_drvdata(&dev->dev, NULL);
4498
4499         return 0;
4500 }
4501
4502 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4503                               const char *buf, size_t count)
4504 {
4505         struct net_device *netdev = dev_get_drvdata(dev);
4506         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4507         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4508         __be64 session_token;
4509         long rc;
4510
4511         if (!sysfs_streq(buf, "1"))
4512                 return -EINVAL;
4513
4514         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4515                          H_GET_SESSION_TOKEN, 0, 0, 0);
4516         if (rc) {
4517                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4518                            rc);
4519                 return -EINVAL;
4520         }
4521
4522         session_token = (__be64)retbuf[0];
4523         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4524                    be64_to_cpu(session_token));
4525         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4526                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4527         if (rc) {
4528                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4529                            rc);
4530                 return -EINVAL;
4531         }
4532
4533         return count;
4534 }
4535
4536 static DEVICE_ATTR_WO(failover);
4537
4538 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4539 {
4540         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4541         struct ibmvnic_adapter *adapter;
4542         struct iommu_table *tbl;
4543         unsigned long ret = 0;
4544         int i;
4545
4546         tbl = get_iommu_table_base(&vdev->dev);
4547
4548         /* netdev inits at probe time along with the structures we need below*/
4549         if (!netdev)
4550                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4551
4552         adapter = netdev_priv(netdev);
4553
4554         ret += PAGE_SIZE; /* the crq message queue */
4555         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4556
4557         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4558                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4559
4560         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4561              i++)
4562                 ret += adapter->rx_pool[i].size *
4563                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4564
4565         return ret;
4566 }
4567
4568 static int ibmvnic_resume(struct device *dev)
4569 {
4570         struct net_device *netdev = dev_get_drvdata(dev);
4571         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4572
4573         if (adapter->state != VNIC_OPEN)
4574                 return 0;
4575
4576         tasklet_schedule(&adapter->tasklet);
4577
4578         return 0;
4579 }
4580
4581 static const struct vio_device_id ibmvnic_device_table[] = {
4582         {"network", "IBM,vnic"},
4583         {"", "" }
4584 };
4585 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4586
4587 static const struct dev_pm_ops ibmvnic_pm_ops = {
4588         .resume = ibmvnic_resume
4589 };
4590
4591 static struct vio_driver ibmvnic_driver = {
4592         .id_table       = ibmvnic_device_table,
4593         .probe          = ibmvnic_probe,
4594         .remove         = ibmvnic_remove,
4595         .get_desired_dma = ibmvnic_get_desired_dma,
4596         .name           = ibmvnic_driver_name,
4597         .pm             = &ibmvnic_pm_ops,
4598 };
4599
4600 /* module functions */
4601 static int __init ibmvnic_module_init(void)
4602 {
4603         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4604                 IBMVNIC_DRIVER_VERSION);
4605
4606         return vio_register_driver(&ibmvnic_driver);
4607 }
4608
4609 static void __exit ibmvnic_module_exit(void)
4610 {
4611         vio_unregister_driver(&ibmvnic_driver);
4612 }
4613
4614 module_init(ibmvnic_module_init);
4615 module_exit(ibmvnic_module_exit);