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 *, bool);
  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(IBMVNIC_MAX_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(IBMVNIC_MAX_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 = rxadd_subcrqs;
 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         return 0;
 558 }
 559
 560 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 561 {
 562         struct ibmvnic_tx_pool *tx_pool;
 563         int tx_scrqs;
 564         int i, j, rc;
 565
 566         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 567         for (i = 0; i < tx_scrqs; i++) {
 568                 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
 569
 570                 tx_pool = &adapter->tx_pool[i];
 571
 572                 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 573                 if (rc)
 574                         return rc;
 575
 576                 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
 577                 if (rc)
 578                         return rc;
 579
 580                 memset(tx_pool->tx_buff, 0,
 581                        adapter->req_tx_entries_per_subcrq *
 582                        sizeof(struct ibmvnic_tx_buff));
 583
 584                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 585                         tx_pool->free_map[j] = j;
 586
 587                 tx_pool->consumer_index = 0;
 588                 tx_pool->producer_index = 0;
 589                 tx_pool->tso_index = 0;
 590         }
 591
 592         return 0;
 593 }
 594
 595 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 596 {
 597         if (!adapter->vpd)
 598                 return;
 599
 600         kfree(adapter->vpd->buff);
 601         kfree(adapter->vpd);
 602
 603         adapter->vpd = NULL;
 604 }
 605
 606 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 607 {
 608         struct ibmvnic_tx_pool *tx_pool;
 609         int i;
 610
 611         if (!adapter->tx_pool)
 612                 return;
 613
 614         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 615                 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
 616                 tx_pool = &adapter->tx_pool[i];
 617                 kfree(tx_pool->tx_buff);
 618                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 619                 free_long_term_buff(adapter, &tx_pool->tso_ltb);
 620                 kfree(tx_pool->free_map);
 621         }
 622
 623         kfree(adapter->tx_pool);
 624         adapter->tx_pool = NULL;
 625         adapter->num_active_tx_pools = 0;
 626 }
 627
 628 static int init_tx_pools(struct net_device *netdev)
 629 {
 630         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 631         struct device *dev = &adapter->vdev->dev;
 632         struct ibmvnic_tx_pool *tx_pool;
 633         int tx_subcrqs;
 634         int i, j;
 635
 636         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 637         adapter->tx_pool = kcalloc(tx_subcrqs,
 638                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 639         if (!adapter->tx_pool)
 640                 return -1;
 641
 642         adapter->num_active_tx_pools = tx_subcrqs;
 643
 644         for (i = 0; i < tx_subcrqs; i++) {
 645                 tx_pool = &adapter->tx_pool[i];
 646
 647                 netdev_dbg(adapter->netdev,
 648                            "Initializing tx_pool[%d], %lld buffs\n",
 649                            i, adapter->req_tx_entries_per_subcrq);
 650
 651                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 652                                            sizeof(struct ibmvnic_tx_buff),
 653                                            GFP_KERNEL);
 654                 if (!tx_pool->tx_buff) {
 655                         dev_err(dev, "tx pool buffer allocation failed\n");
 656                         release_tx_pools(adapter);
 657                         return -1;
 658                 }
 659
 660                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 661                                          adapter->req_tx_entries_per_subcrq *
 662                                          adapter->req_mtu)) {
 663                         release_tx_pools(adapter);
 664                         return -1;
 665                 }
 666
 667                 /* alloc TSO ltb */
 668                 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
 669                                          IBMVNIC_TSO_BUFS *
 670                                          IBMVNIC_TSO_BUF_SZ)) {
 671                         release_tx_pools(adapter);
 672                         return -1;
 673                 }
 674
 675                 tx_pool->tso_index = 0;
 676
 677                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 678                                             sizeof(int), GFP_KERNEL);
 679                 if (!tx_pool->free_map) {
 680                         release_tx_pools(adapter);
 681                         return -1;
 682                 }
 683
 684                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 685                         tx_pool->free_map[j] = j;
 686
 687                 tx_pool->consumer_index = 0;
 688                 tx_pool->producer_index = 0;
 689         }
 690
 691         return 0;
 692 }
 693
 694 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 695 {
 696         struct device *dev = &adapter->vdev->dev;
 697         struct ibmvnic_error_buff *error_buff, *tmp;
 698         unsigned long flags;
 699
 700         spin_lock_irqsave(&adapter->error_list_lock, flags);
 701         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 702                 list_del(&error_buff->list);
 703                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 704                                  DMA_FROM_DEVICE);
 705                 kfree(error_buff->buff);
 706                 kfree(error_buff);
 707         }
 708         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 709 }
 710
 711 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 712 {
 713         int i;
 714
 715         if (adapter->napi_enabled)
 716                 return;
 717
 718         for (i = 0; i < adapter->req_rx_queues; i++)
 719                 napi_enable(&adapter->napi[i]);
 720
 721         adapter->napi_enabled = true;
 722 }
 723
 724 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 725 {
 726         int i;
 727
 728         if (!adapter->napi_enabled)
 729                 return;
 730
 731         for (i = 0; i < adapter->req_rx_queues; i++) {
 732                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 733                 napi_disable(&adapter->napi[i]);
 734         }
 735
 736         adapter->napi_enabled = false;
 737 }
 738
 739 static int init_napi(struct ibmvnic_adapter *adapter)
 740 {
 741         int i;
 742
 743         adapter->napi = kcalloc(adapter->req_rx_queues,
 744                                 sizeof(struct napi_struct), GFP_KERNEL);
 745         if (!adapter->napi)
 746                 return -ENOMEM;
 747
 748         for (i = 0; i < adapter->req_rx_queues; i++) {
 749                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 750                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 751                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 752         }
 753
 754         adapter->num_active_rx_napi = adapter->req_rx_queues;
 755         return 0;
 756 }
 757
 758 static void release_napi(struct ibmvnic_adapter *adapter)
 759 {
 760         int i;
 761
 762         if (!adapter->napi)
 763                 return;
 764
 765         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 766                 if (&adapter->napi[i]) {
 767                         netdev_dbg(adapter->netdev,
 768                                    "Releasing napi[%d]\n", i);
 769                         netif_napi_del(&adapter->napi[i]);
 770                 }
 771         }
 772
 773         kfree(adapter->napi);
 774         adapter->napi = NULL;
 775         adapter->num_active_rx_napi = 0;
 776 }
 777
 778 static int ibmvnic_login(struct net_device *netdev)
 779 {
 780         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 781         unsigned long timeout = msecs_to_jiffies(30000);
 782         struct device *dev = &adapter->vdev->dev;
 783         int rc;
 784
 785         do {
 786                 if (adapter->renegotiate) {
 787                         adapter->renegotiate = false;
 788                         release_sub_crqs(adapter, 1);
 789
 790                         reinit_completion(&adapter->init_done);
 791                         send_cap_queries(adapter);
 792                         if (!wait_for_completion_timeout(&adapter->init_done,
 793                                                          timeout)) {
 794                                 dev_err(dev, "Capabilities query timeout\n");
 795                                 return -1;
 796                         }
 797                         rc = init_sub_crqs(adapter);
 798                         if (rc) {
 799                                 dev_err(dev,
 800                                         "Initialization of SCRQ's failed\n");
 801                                 return -1;
 802                         }
 803                         rc = init_sub_crq_irqs(adapter);
 804                         if (rc) {
 805                                 dev_err(dev,
 806                                         "Initialization of SCRQ's irqs failed\n");
 807                                 return -1;
 808                         }
 809                 }
 810
 811                 reinit_completion(&adapter->init_done);
 812                 send_login(adapter);
 813                 if (!wait_for_completion_timeout(&adapter->init_done,
 814                                                  timeout)) {
 815                         dev_err(dev, "Login timeout\n");
 816                         return -1;
 817                 }
 818         } while (adapter->renegotiate);
 819
 820         /* handle pending MAC address changes after successful login */
 821         if (adapter->mac_change_pending) {
 822                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 823                 adapter->mac_change_pending = false;
 824         }
 825
 826         return 0;
 827 }
 828
 829 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 830 {
 831         kfree(adapter->login_buf);
 832         adapter->login_buf = NULL;
 833 }
 834
 835 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 836 {
 837         kfree(adapter->login_rsp_buf);
 838         adapter->login_rsp_buf = NULL;
 839 }
 840
 841 static void release_resources(struct ibmvnic_adapter *adapter)
 842 {
 843         release_vpd_data(adapter);
 844
 845         release_tx_pools(adapter);
 846         release_rx_pools(adapter);
 847
 848         release_error_buffers(adapter);
 849         release_napi(adapter);
 850         release_login_rsp_buffer(adapter);
 851 }
 852
 853 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 854 {
 855         struct net_device *netdev = adapter->netdev;
 856         unsigned long timeout = msecs_to_jiffies(30000);
 857         union ibmvnic_crq crq;
 858         bool resend;
 859         int rc;
 860
 861         netdev_dbg(netdev, "setting link state %d\n", link_state);
 862
 863         memset(&crq, 0, sizeof(crq));
 864         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 865         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 866         crq.logical_link_state.link_state = link_state;
 867
 868         do {
 869                 resend = false;
 870
 871                 reinit_completion(&adapter->init_done);
 872                 rc = ibmvnic_send_crq(adapter, &crq);
 873                 if (rc) {
 874                         netdev_err(netdev, "Failed to set link state\n");
 875                         return rc;
 876                 }
 877
 878                 if (!wait_for_completion_timeout(&adapter->init_done,
 879                                                  timeout)) {
 880                         netdev_err(netdev, "timeout setting link state\n");
 881                         return -1;
 882                 }
 883
 884                 if (adapter->init_done_rc == 1) {
 885                         /* Partuial success, delay and re-send */
 886                         mdelay(1000);
 887                         resend = true;
 888                 }
 889         } while (resend);
 890
 891         return 0;
 892 }
 893
 894 static int set_real_num_queues(struct net_device *netdev)
 895 {
 896         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 897         int rc;
 898
 899         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 900                    adapter->req_tx_queues, adapter->req_rx_queues);
 901
 902         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 903         if (rc) {
 904                 netdev_err(netdev, "failed to set the number of tx queues\n");
 905                 return rc;
 906         }
 907
 908         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 909         if (rc)
 910                 netdev_err(netdev, "failed to set the number of rx queues\n");
 911
 912         return rc;
 913 }
 914
 915 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 916 {
 917         struct device *dev = &adapter->vdev->dev;
 918         union ibmvnic_crq crq;
 919         int len = 0;
 920
 921         if (adapter->vpd->buff)
 922                 len = adapter->vpd->len;
 923
 924         init_completion(&adapter->fw_done);
 925         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 926         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 927         ibmvnic_send_crq(adapter, &crq);
 928         wait_for_completion(&adapter->fw_done);
 929
 930         if (!adapter->vpd->len)
 931                 return -ENODATA;
 932
 933         if (!adapter->vpd->buff)
 934                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 935         else if (adapter->vpd->len != len)
 936                 adapter->vpd->buff =
 937                         krealloc(adapter->vpd->buff,
 938                                  adapter->vpd->len, GFP_KERNEL);
 939
 940         if (!adapter->vpd->buff) {
 941                 dev_err(dev, "Could allocate VPD buffer\n");
 942                 return -ENOMEM;
 943         }
 944
 945         adapter->vpd->dma_addr =
 946                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 947                                DMA_FROM_DEVICE);
 948         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 949                 dev_err(dev, "Could not map VPD buffer\n");
 950                 kfree(adapter->vpd->buff);
 951                 adapter->vpd->buff = NULL;
 952                 return -ENOMEM;
 953         }
 954
 955         reinit_completion(&adapter->fw_done);
 956         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 957         crq.get_vpd.cmd = GET_VPD;
 958         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 959         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
 960         ibmvnic_send_crq(adapter, &crq);
 961         wait_for_completion(&adapter->fw_done);
 962
 963         return 0;
 964 }
 965
 966 static int init_resources(struct ibmvnic_adapter *adapter)
 967 {
 968         struct net_device *netdev = adapter->netdev;
 969         int rc;
 970
 971         rc = set_real_num_queues(netdev);
 972         if (rc)
 973                 return rc;
 974
 975         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
 976         if (!adapter->vpd)
 977                 return -ENOMEM;
 978
 979         /* Vital Product Data (VPD) */
 980         rc = ibmvnic_get_vpd(adapter);
 981         if (rc) {
 982                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
 983                 return rc;
 984         }
 985
 986         adapter->map_id = 1;
 987
 988         rc = init_napi(adapter);
 989         if (rc)
 990                 return rc;
 991
 992         send_map_query(adapter);
 993
 994         rc = init_rx_pools(netdev);
 995         if (rc)
 996                 return rc;
 997
 998         rc = init_tx_pools(netdev);
 999         return rc;
1000 }
1001
1002 static int __ibmvnic_open(struct net_device *netdev)
1003 {
1004         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1005         enum vnic_state prev_state = adapter->state;
1006         int i, rc;
1007
1008         adapter->state = VNIC_OPENING;
1009         replenish_pools(adapter);
1010         ibmvnic_napi_enable(adapter);
1011
1012         /* We're ready to receive frames, enable the sub-crq interrupts and
1013          * set the logical link state to up
1014          */
1015         for (i = 0; i < adapter->req_rx_queues; i++) {
1016                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1017                 if (prev_state == VNIC_CLOSED)
1018                         enable_irq(adapter->rx_scrq[i]->irq);
1019                 else
1020                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1021         }
1022
1023         for (i = 0; i < adapter->req_tx_queues; i++) {
1024                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1025                 if (prev_state == VNIC_CLOSED)
1026                         enable_irq(adapter->tx_scrq[i]->irq);
1027                 else
1028                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1029         }
1030
1031         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1032         if (rc) {
1033                 for (i = 0; i < adapter->req_rx_queues; i++)
1034                         napi_disable(&adapter->napi[i]);
1035                 release_resources(adapter);
1036                 return rc;
1037         }
1038
1039         netif_tx_start_all_queues(netdev);
1040
1041         if (prev_state == VNIC_CLOSED) {
1042                 for (i = 0; i < adapter->req_rx_queues; i++)
1043                         napi_schedule(&adapter->napi[i]);
1044         }
1045
1046         adapter->state = VNIC_OPEN;
1047         return rc;
1048 }
1049
1050 static int ibmvnic_open(struct net_device *netdev)
1051 {
1052         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1053         int rc;
1054
1055         mutex_lock(&adapter->reset_lock);
1056
1057         if (adapter->state != VNIC_CLOSED) {
1058                 rc = ibmvnic_login(netdev);
1059                 if (rc) {
1060                         mutex_unlock(&adapter->reset_lock);
1061                         return rc;
1062                 }
1063
1064                 rc = init_resources(adapter);
1065                 if (rc) {
1066                         netdev_err(netdev, "failed to initialize resources\n");
1067                         release_resources(adapter);
1068                         mutex_unlock(&adapter->reset_lock);
1069                         return rc;
1070                 }
1071         }
1072
1073         rc = __ibmvnic_open(netdev);
1074         netif_carrier_on(netdev);
1075
1076         mutex_unlock(&adapter->reset_lock);
1077
1078         return rc;
1079 }
1080
1081 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1082 {
1083         struct ibmvnic_rx_pool *rx_pool;
1084         u64 rx_entries;
1085         int rx_scrqs;
1086         int i, j;
1087
1088         if (!adapter->rx_pool)
1089                 return;
1090
1091         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
1092         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1093
1094         /* Free any remaining skbs in the rx buffer pools */
1095         for (i = 0; i < rx_scrqs; i++) {
1096                 rx_pool = &adapter->rx_pool[i];
1097                 if (!rx_pool)
1098                         continue;
1099
1100                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1101                 for (j = 0; j < rx_entries; j++) {
1102                         if (rx_pool->rx_buff[j].skb) {
1103                                 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
1104                                 rx_pool->rx_buff[j].skb = NULL;
1105                         }
1106                 }
1107         }
1108 }
1109
1110 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1111 {
1112         struct ibmvnic_tx_pool *tx_pool;
1113         u64 tx_entries;
1114         int tx_scrqs;
1115         int i, j;
1116
1117         if (!adapter->tx_pool)
1118                 return;
1119
1120         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1121         tx_entries = adapter->req_tx_entries_per_subcrq;
1122
1123         /* Free any remaining skbs in the tx buffer pools */
1124         for (i = 0; i < tx_scrqs; i++) {
1125                 tx_pool = &adapter->tx_pool[i];
1126                 if (!tx_pool)
1127                         continue;
1128
1129                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1130                 for (j = 0; j < tx_entries; j++) {
1131                         if (tx_pool->tx_buff[j].skb) {
1132                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1133                                 tx_pool->tx_buff[j].skb = NULL;
1134                         }
1135                 }
1136         }
1137 }
1138
1139 static int __ibmvnic_close(struct net_device *netdev)
1140 {
1141         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1142         int rc = 0;
1143         int i;
1144
1145         adapter->state = VNIC_CLOSING;
1146
1147         /* ensure that transmissions are stopped if called by do_reset */
1148         if (adapter->resetting)
1149                 netif_tx_disable(netdev);
1150         else
1151                 netif_tx_stop_all_queues(netdev);
1152
1153         ibmvnic_napi_disable(adapter);
1154
1155         if (adapter->tx_scrq) {
1156                 for (i = 0; i < adapter->req_tx_queues; i++)
1157                         if (adapter->tx_scrq[i]->irq) {
1158                                 netdev_dbg(adapter->netdev,
1159                                            "Disabling tx_scrq[%d] irq\n", i);
1160                                 disable_irq(adapter->tx_scrq[i]->irq);
1161                         }
1162         }
1163
1164         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1165         if (rc)
1166                 return rc;
1167
1168         if (adapter->rx_scrq) {
1169                 for (i = 0; i < adapter->req_rx_queues; i++) {
1170                         int retries = 10;
1171
1172                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1173                                 retries--;
1174                                 mdelay(100);
1175
1176                                 if (retries == 0)
1177                                         break;
1178                         }
1179
1180                         if (adapter->rx_scrq[i]->irq) {
1181                                 netdev_dbg(adapter->netdev,
1182                                            "Disabling rx_scrq[%d] irq\n", i);
1183                                 disable_irq(adapter->rx_scrq[i]->irq);
1184                         }
1185                 }
1186         }
1187         clean_rx_pools(adapter);
1188         clean_tx_pools(adapter);
1189         adapter->state = VNIC_CLOSED;
1190         return rc;
1191 }
1192
1193 static int ibmvnic_close(struct net_device *netdev)
1194 {
1195         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1196         int rc;
1197
1198         mutex_lock(&adapter->reset_lock);
1199         rc = __ibmvnic_close(netdev);
1200         mutex_unlock(&adapter->reset_lock);
1201
1202         return rc;
1203 }
1204
1205 /**
1206  * build_hdr_data - creates L2/L3/L4 header data buffer
1207  * @hdr_field - bitfield determining needed headers
1208  * @skb - socket buffer
1209  * @hdr_len - array of header lengths
1210  * @tot_len - total length of data
1211  *
1212  * Reads hdr_field to determine which headers are needed by firmware.
1213  * Builds a buffer containing these headers.  Saves individual header
1214  * lengths and total buffer length to be used to build descriptors.
1215  */
1216 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1217                           int *hdr_len, u8 *hdr_data)
1218 {
1219         int len = 0;
1220         u8 *hdr;
1221
1222         hdr_len[0] = sizeof(struct ethhdr);
1223
1224         if (skb->protocol == htons(ETH_P_IP)) {
1225                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1226                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1227                         hdr_len[2] = tcp_hdrlen(skb);
1228                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1229                         hdr_len[2] = sizeof(struct udphdr);
1230         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1231                 hdr_len[1] = sizeof(struct ipv6hdr);
1232                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1233                         hdr_len[2] = tcp_hdrlen(skb);
1234                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1235                         hdr_len[2] = sizeof(struct udphdr);
1236         } else if (skb->protocol == htons(ETH_P_ARP)) {
1237                 hdr_len[1] = arp_hdr_len(skb->dev);
1238                 hdr_len[2] = 0;
1239         }
1240
1241         memset(hdr_data, 0, 120);
1242         if ((hdr_field >> 6) & 1) {
1243                 hdr = skb_mac_header(skb);
1244                 memcpy(hdr_data, hdr, hdr_len[0]);
1245                 len += hdr_len[0];
1246         }
1247
1248         if ((hdr_field >> 5) & 1) {
1249                 hdr = skb_network_header(skb);
1250                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1251                 len += hdr_len[1];
1252         }
1253
1254         if ((hdr_field >> 4) & 1) {
1255                 hdr = skb_transport_header(skb);
1256                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1257                 len += hdr_len[2];
1258         }
1259         return len;
1260 }
1261
1262 /**
1263  * create_hdr_descs - create header and header extension descriptors
1264  * @hdr_field - bitfield determining needed headers
1265  * @data - buffer containing header data
1266  * @len - length of data buffer
1267  * @hdr_len - array of individual header lengths
1268  * @scrq_arr - descriptor array
1269  *
1270  * Creates header and, if needed, header extension descriptors and
1271  * places them in a descriptor array, scrq_arr
1272  */
1273
1274 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1275                             union sub_crq *scrq_arr)
1276 {
1277         union sub_crq hdr_desc;
1278         int tmp_len = len;
1279         int num_descs = 0;
1280         u8 *data, *cur;
1281         int tmp;
1282
1283         while (tmp_len > 0) {
1284                 cur = hdr_data + len - tmp_len;
1285
1286                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1287                 if (cur != hdr_data) {
1288                         data = hdr_desc.hdr_ext.data;
1289                         tmp = tmp_len > 29 ? 29 : tmp_len;
1290                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1291                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1292                         hdr_desc.hdr_ext.len = tmp;
1293                 } else {
1294                         data = hdr_desc.hdr.data;
1295                         tmp = tmp_len > 24 ? 24 : tmp_len;
1296                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1297                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1298                         hdr_desc.hdr.len = tmp;
1299                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1300                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1301                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1302                         hdr_desc.hdr.flag = hdr_field << 1;
1303                 }
1304                 memcpy(data, cur, tmp);
1305                 tmp_len -= tmp;
1306                 *scrq_arr = hdr_desc;
1307                 scrq_arr++;
1308                 num_descs++;
1309         }
1310
1311         return num_descs;
1312 }
1313
1314 /**
1315  * build_hdr_descs_arr - build a header descriptor array
1316  * @skb - socket buffer
1317  * @num_entries - number of descriptors to be sent
1318  * @subcrq - first TX descriptor
1319  * @hdr_field - bit field determining which headers will be sent
1320  *
1321  * This function will build a TX descriptor array with applicable
1322  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1323  */
1324
1325 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1326                                 int *num_entries, u8 hdr_field)
1327 {
1328         int hdr_len[3] = {0, 0, 0};
1329         int tot_len;
1330         u8 *hdr_data = txbuff->hdr_data;
1331
1332         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1333                                  txbuff->hdr_data);
1334         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1335                          txbuff->indir_arr + 1);
1336 }
1337
1338 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1339 {
1340         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1341         int queue_num = skb_get_queue_mapping(skb);
1342         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1343         struct device *dev = &adapter->vdev->dev;
1344         struct ibmvnic_tx_buff *tx_buff = NULL;
1345         struct ibmvnic_sub_crq_queue *tx_scrq;
1346         struct ibmvnic_tx_pool *tx_pool;
1347         unsigned int tx_send_failed = 0;
1348         unsigned int tx_map_failed = 0;
1349         unsigned int tx_dropped = 0;
1350         unsigned int tx_packets = 0;
1351         unsigned int tx_bytes = 0;
1352         dma_addr_t data_dma_addr;
1353         struct netdev_queue *txq;
1354         unsigned long lpar_rc;
1355         union sub_crq tx_crq;
1356         unsigned int offset;
1357         int num_entries = 1;
1358         unsigned char *dst;
1359         u64 *handle_array;
1360         int index = 0;
1361         u8 proto = 0;
1362         int ret = 0;
1363
1364         if (adapter->resetting) {
1365                 if (!netif_subqueue_stopped(netdev, skb))
1366                         netif_stop_subqueue(netdev, queue_num);
1367                 dev_kfree_skb_any(skb);
1368
1369                 tx_send_failed++;
1370                 tx_dropped++;
1371                 ret = NETDEV_TX_OK;
1372                 goto out;
1373         }
1374
1375         tx_pool = &adapter->tx_pool[queue_num];
1376         tx_scrq = adapter->tx_scrq[queue_num];
1377         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1378         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1379                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1380
1381         index = tx_pool->free_map[tx_pool->consumer_index];
1382
1383         if (skb_is_gso(skb)) {
1384                 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1385                 dst = tx_pool->tso_ltb.buff + offset;
1386                 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1387                 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1388                 tx_pool->tso_index++;
1389                 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1390                         tx_pool->tso_index = 0;
1391         } else {
1392                 offset = index * adapter->req_mtu;
1393                 dst = tx_pool->long_term_buff.buff + offset;
1394                 memset(dst, 0, adapter->req_mtu);
1395                 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1396         }
1397
1398         if (skb_shinfo(skb)->nr_frags) {
1399                 int cur, i;
1400
1401                 /* Copy the head */
1402                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1403                 cur = skb_headlen(skb);
1404
1405                 /* Copy the frags */
1406                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1407                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1408
1409                         memcpy(dst + cur,
1410                                page_address(skb_frag_page(frag)) +
1411                                frag->page_offset, skb_frag_size(frag));
1412                         cur += skb_frag_size(frag);
1413                 }
1414         } else {
1415                 skb_copy_from_linear_data(skb, dst, skb->len);
1416         }
1417
1418         tx_pool->consumer_index =
1419             (tx_pool->consumer_index + 1) %
1420                 adapter->req_tx_entries_per_subcrq;
1421
1422         tx_buff = &tx_pool->tx_buff[index];
1423         tx_buff->skb = skb;
1424         tx_buff->data_dma[0] = data_dma_addr;
1425         tx_buff->data_len[0] = skb->len;
1426         tx_buff->index = index;
1427         tx_buff->pool_index = queue_num;
1428         tx_buff->last_frag = true;
1429
1430         memset(&tx_crq, 0, sizeof(tx_crq));
1431         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1432         tx_crq.v1.type = IBMVNIC_TX_DESC;
1433         tx_crq.v1.n_crq_elem = 1;
1434         tx_crq.v1.n_sge = 1;
1435         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1436         tx_crq.v1.correlator = cpu_to_be32(index);
1437         if (skb_is_gso(skb))
1438                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1439         else
1440                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1441         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1442         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1443
1444         if (adapter->vlan_header_insertion) {
1445                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1446                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1447         }
1448
1449         if (skb->protocol == htons(ETH_P_IP)) {
1450                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1451                 proto = ip_hdr(skb)->protocol;
1452         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1453                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1454                 proto = ipv6_hdr(skb)->nexthdr;
1455         }
1456
1457         if (proto == IPPROTO_TCP)
1458                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1459         else if (proto == IPPROTO_UDP)
1460                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1461
1462         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1463                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1464                 hdrs += 2;
1465         }
1466         if (skb_is_gso(skb)) {
1467                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1468                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1469                 hdrs += 2;
1470         }
1471         /* determine if l2/3/4 headers are sent to firmware */
1472         if ((*hdrs >> 7) & 1) {
1473                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1474                 tx_crq.v1.n_crq_elem = num_entries;
1475                 tx_buff->num_entries = num_entries;
1476                 tx_buff->indir_arr[0] = tx_crq;
1477                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1478                                                     sizeof(tx_buff->indir_arr),
1479                                                     DMA_TO_DEVICE);
1480                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1481                         dev_kfree_skb_any(skb);
1482                         tx_buff->skb = NULL;
1483                         if (!firmware_has_feature(FW_FEATURE_CMO))
1484                                 dev_err(dev, "tx: unable to map descriptor array\n");
1485                         tx_map_failed++;
1486                         tx_dropped++;
1487                         ret = NETDEV_TX_OK;
1488                         goto out;
1489                 }
1490                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1491                                                (u64)tx_buff->indir_dma,
1492                                                (u64)num_entries);
1493         } else {
1494                 tx_buff->num_entries = num_entries;
1495                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1496                                       &tx_crq);
1497         }
1498         if (lpar_rc != H_SUCCESS) {
1499                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1500
1501                 if (tx_pool->consumer_index == 0)
1502                         tx_pool->consumer_index =
1503                                 adapter->req_tx_entries_per_subcrq - 1;
1504                 else
1505                         tx_pool->consumer_index--;
1506
1507                 dev_kfree_skb_any(skb);
1508                 tx_buff->skb = NULL;
1509
1510                 if (lpar_rc == H_CLOSED) {
1511                         /* Disable TX and report carrier off if queue is closed.
1512                          * Firmware guarantees that a signal will be sent to the
1513                          * driver, triggering a reset or some other action.
1514                          */
1515                         netif_tx_stop_all_queues(netdev);
1516                         netif_carrier_off(netdev);
1517                 }
1518
1519                 tx_send_failed++;
1520                 tx_dropped++;
1521                 ret = NETDEV_TX_OK;
1522                 goto out;
1523         }
1524
1525         if (atomic_add_return(num_entries, &tx_scrq->used)
1526                                         >= adapter->req_tx_entries_per_subcrq) {
1527                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1528                 netif_stop_subqueue(netdev, queue_num);
1529         }
1530
1531         tx_packets++;
1532         tx_bytes += skb->len;
1533         txq->trans_start = jiffies;
1534         ret = NETDEV_TX_OK;
1535
1536 out:
1537         netdev->stats.tx_dropped += tx_dropped;
1538         netdev->stats.tx_bytes += tx_bytes;
1539         netdev->stats.tx_packets += tx_packets;
1540         adapter->tx_send_failed += tx_send_failed;
1541         adapter->tx_map_failed += tx_map_failed;
1542         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1543         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1544         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1545
1546         return ret;
1547 }
1548
1549 static void ibmvnic_set_multi(struct net_device *netdev)
1550 {
1551         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1552         struct netdev_hw_addr *ha;
1553         union ibmvnic_crq crq;
1554
1555         memset(&crq, 0, sizeof(crq));
1556         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1557         crq.request_capability.cmd = REQUEST_CAPABILITY;
1558
1559         if (netdev->flags & IFF_PROMISC) {
1560                 if (!adapter->promisc_supported)
1561                         return;
1562         } else {
1563                 if (netdev->flags & IFF_ALLMULTI) {
1564                         /* Accept 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_ENABLE_ALL;
1569                         ibmvnic_send_crq(adapter, &crq);
1570                 } else if (netdev_mc_empty(netdev)) {
1571                         /* Reject all multicast */
1572                         memset(&crq, 0, sizeof(crq));
1573                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1574                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1575                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1576                         ibmvnic_send_crq(adapter, &crq);
1577                 } else {
1578                         /* Accept one or more multicast(s) */
1579                         netdev_for_each_mc_addr(ha, netdev) {
1580                                 memset(&crq, 0, sizeof(crq));
1581                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1582                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1583                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1584                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1585                                                 ha->addr);
1586                                 ibmvnic_send_crq(adapter, &crq);
1587                         }
1588                 }
1589         }
1590 }
1591
1592 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1593 {
1594         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1595         struct sockaddr *addr = p;
1596         union ibmvnic_crq crq;
1597
1598         if (!is_valid_ether_addr(addr->sa_data))
1599                 return -EADDRNOTAVAIL;
1600
1601         memset(&crq, 0, sizeof(crq));
1602         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1603         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1604         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1605
1606         init_completion(&adapter->fw_done);
1607         ibmvnic_send_crq(adapter, &crq);
1608         wait_for_completion(&adapter->fw_done);
1609         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1610         return adapter->fw_done_rc ? -EIO : 0;
1611 }
1612
1613 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1614 {
1615         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1616         struct sockaddr *addr = p;
1617         int rc;
1618
1619         if (adapter->state == VNIC_PROBED) {
1620                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1621                 adapter->mac_change_pending = true;
1622                 return 0;
1623         }
1624
1625         rc = __ibmvnic_set_mac(netdev, addr);
1626
1627         return rc;
1628 }
1629
1630 /**
1631  * do_reset returns zero if we are able to keep processing reset events, or
1632  * non-zero if we hit a fatal error and must halt.
1633  */
1634 static int do_reset(struct ibmvnic_adapter *adapter,
1635                     struct ibmvnic_rwi *rwi, u32 reset_state)
1636 {
1637         u64 old_num_rx_queues, old_num_tx_queues;
1638         struct net_device *netdev = adapter->netdev;
1639         int i, rc;
1640
1641         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1642                    rwi->reset_reason);
1643
1644         netif_carrier_off(netdev);
1645         adapter->reset_reason = rwi->reset_reason;
1646
1647         old_num_rx_queues = adapter->req_rx_queues;
1648         old_num_tx_queues = adapter->req_tx_queues;
1649
1650         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1651                 rc = ibmvnic_reenable_crq_queue(adapter);
1652                 if (rc)
1653                         return 0;
1654         }
1655
1656         rc = __ibmvnic_close(netdev);
1657         if (rc)
1658                 return rc;
1659
1660         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1661             adapter->wait_for_reset) {
1662                 release_resources(adapter);
1663                 release_sub_crqs(adapter, 1);
1664                 release_crq_queue(adapter);
1665         }
1666
1667         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1668                 /* remove the closed state so when we call open it appears
1669                  * we are coming from the probed state.
1670                  */
1671                 adapter->state = VNIC_PROBED;
1672
1673                 rc = ibmvnic_init(adapter);
1674                 if (rc)
1675                         return IBMVNIC_INIT_FAILED;
1676
1677                 /* If the adapter was in PROBE state prior to the reset,
1678                  * exit here.
1679                  */
1680                 if (reset_state == VNIC_PROBED)
1681                         return 0;
1682
1683                 rc = ibmvnic_login(netdev);
1684                 if (rc) {
1685                         adapter->state = VNIC_PROBED;
1686                         return 0;
1687                 }
1688
1689                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1690                     adapter->wait_for_reset) {
1691                         rc = init_resources(adapter);
1692                         if (rc)
1693                                 return rc;
1694                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1695                            adapter->req_tx_queues != old_num_tx_queues) {
1696                         adapter->map_id = 1;
1697                         release_rx_pools(adapter);
1698                         release_tx_pools(adapter);
1699                         init_rx_pools(netdev);
1700                         init_tx_pools(netdev);
1701
1702                         release_napi(adapter);
1703                         init_napi(adapter);
1704                 } else {
1705                         rc = reset_tx_pools(adapter);
1706                         if (rc)
1707                                 return rc;
1708
1709                         rc = reset_rx_pools(adapter);
1710                         if (rc)
1711                                 return rc;
1712
1713                         if (reset_state == VNIC_CLOSED)
1714                                 return 0;
1715                 }
1716         }
1717
1718         rc = __ibmvnic_open(netdev);
1719         if (rc) {
1720                 if (list_empty(&adapter->rwi_list))
1721                         adapter->state = VNIC_CLOSED;
1722                 else
1723                         adapter->state = reset_state;
1724
1725                 return 0;
1726         }
1727
1728         /* kick napi */
1729         for (i = 0; i < adapter->req_rx_queues; i++)
1730                 napi_schedule(&adapter->napi[i]);
1731
1732         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1733                 netdev_notify_peers(netdev);
1734
1735         netif_carrier_on(netdev);
1736
1737         return 0;
1738 }
1739
1740 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1741 {
1742         struct ibmvnic_rwi *rwi;
1743
1744         mutex_lock(&adapter->rwi_lock);
1745
1746         if (!list_empty(&adapter->rwi_list)) {
1747                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1748                                        list);
1749                 list_del(&rwi->list);
1750         } else {
1751                 rwi = NULL;
1752         }
1753
1754         mutex_unlock(&adapter->rwi_lock);
1755         return rwi;
1756 }
1757
1758 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1759 {
1760         struct ibmvnic_rwi *rwi;
1761
1762         rwi = get_next_rwi(adapter);
1763         while (rwi) {
1764                 kfree(rwi);
1765                 rwi = get_next_rwi(adapter);
1766         }
1767 }
1768
1769 static void __ibmvnic_reset(struct work_struct *work)
1770 {
1771         struct ibmvnic_rwi *rwi;
1772         struct ibmvnic_adapter *adapter;
1773         struct net_device *netdev;
1774         u32 reset_state;
1775         int rc = 0;
1776
1777         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1778         netdev = adapter->netdev;
1779
1780         mutex_lock(&adapter->reset_lock);
1781         adapter->resetting = true;
1782         reset_state = adapter->state;
1783
1784         rwi = get_next_rwi(adapter);
1785         while (rwi) {
1786                 rc = do_reset(adapter, rwi, reset_state);
1787                 kfree(rwi);
1788                 if (rc && rc != IBMVNIC_INIT_FAILED)
1789                         break;
1790
1791                 rwi = get_next_rwi(adapter);
1792         }
1793
1794         if (adapter->wait_for_reset) {
1795                 adapter->wait_for_reset = false;
1796                 adapter->reset_done_rc = rc;
1797                 complete(&adapter->reset_done);
1798         }
1799
1800         if (rc) {
1801                 netdev_dbg(adapter->netdev, "Reset failed\n");
1802                 free_all_rwi(adapter);
1803                 mutex_unlock(&adapter->reset_lock);
1804                 return;
1805         }
1806
1807         adapter->resetting = false;
1808         mutex_unlock(&adapter->reset_lock);
1809 }
1810
1811 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1812                           enum ibmvnic_reset_reason reason)
1813 {
1814         struct ibmvnic_rwi *rwi, *tmp;
1815         struct net_device *netdev = adapter->netdev;
1816         struct list_head *entry;
1817
1818         if (adapter->state == VNIC_REMOVING ||
1819             adapter->state == VNIC_REMOVED) {
1820                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1821                 return;
1822         }
1823
1824         if (adapter->state == VNIC_PROBING) {
1825                 netdev_warn(netdev, "Adapter reset during probe\n");
1826                 adapter->init_done_rc = EAGAIN;
1827                 return;
1828         }
1829
1830         mutex_lock(&adapter->rwi_lock);
1831
1832         list_for_each(entry, &adapter->rwi_list) {
1833                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1834                 if (tmp->reset_reason == reason) {
1835                         netdev_dbg(netdev, "Skipping matching reset\n");
1836                         mutex_unlock(&adapter->rwi_lock);
1837                         return;
1838                 }
1839         }
1840
1841         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1842         if (!rwi) {
1843                 mutex_unlock(&adapter->rwi_lock);
1844                 ibmvnic_close(netdev);
1845                 return;
1846         }
1847
1848         rwi->reset_reason = reason;
1849         list_add_tail(&rwi->list, &adapter->rwi_list);
1850         mutex_unlock(&adapter->rwi_lock);
1851
1852         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1853         schedule_work(&adapter->ibmvnic_reset);
1854 }
1855
1856 static void ibmvnic_tx_timeout(struct net_device *dev)
1857 {
1858         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1859
1860         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1861 }
1862
1863 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1864                                   struct ibmvnic_rx_buff *rx_buff)
1865 {
1866         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1867
1868         rx_buff->skb = NULL;
1869
1870         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1871         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1872
1873         atomic_dec(&pool->available);
1874 }
1875
1876 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1877 {
1878         struct net_device *netdev = napi->dev;
1879         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1880         int scrq_num = (int)(napi - adapter->napi);
1881         int frames_processed = 0;
1882
1883 restart_poll:
1884         while (frames_processed < budget) {
1885                 struct sk_buff *skb;
1886                 struct ibmvnic_rx_buff *rx_buff;
1887                 union sub_crq *next;
1888                 u32 length;
1889                 u16 offset;
1890                 u8 flags = 0;
1891
1892                 if (unlikely(adapter->resetting &&
1893                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1894                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1895                         napi_complete_done(napi, frames_processed);
1896                         return frames_processed;
1897                 }
1898
1899                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1900                         break;
1901                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1902                 rx_buff =
1903                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1904                                                           rx_comp.correlator);
1905                 /* do error checking */
1906                 if (next->rx_comp.rc) {
1907                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1908                                    be16_to_cpu(next->rx_comp.rc));
1909                         /* free the entry */
1910                         next->rx_comp.first = 0;
1911                         dev_kfree_skb_any(rx_buff->skb);
1912                         remove_buff_from_pool(adapter, rx_buff);
1913                         continue;
1914                 } else if (!rx_buff->skb) {
1915                         /* free the entry */
1916                         next->rx_comp.first = 0;
1917                         remove_buff_from_pool(adapter, rx_buff);
1918                         continue;
1919                 }
1920
1921                 length = be32_to_cpu(next->rx_comp.len);
1922                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1923                 flags = next->rx_comp.flags;
1924                 skb = rx_buff->skb;
1925                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1926                                         length);
1927
1928                 /* VLAN Header has been stripped by the system firmware and
1929                  * needs to be inserted by the driver
1930                  */
1931                 if (adapter->rx_vlan_header_insertion &&
1932                     (flags & IBMVNIC_VLAN_STRIPPED))
1933                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1934                                                ntohs(next->rx_comp.vlan_tci));
1935
1936                 /* free the entry */
1937                 next->rx_comp.first = 0;
1938                 remove_buff_from_pool(adapter, rx_buff);
1939
1940                 skb_put(skb, length);
1941                 skb->protocol = eth_type_trans(skb, netdev);
1942                 skb_record_rx_queue(skb, scrq_num);
1943
1944                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1945                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1946                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1947                 }
1948
1949                 length = skb->len;
1950                 napi_gro_receive(napi, skb); /* send it up */
1951                 netdev->stats.rx_packets++;
1952                 netdev->stats.rx_bytes += length;
1953                 adapter->rx_stats_buffers[scrq_num].packets++;
1954                 adapter->rx_stats_buffers[scrq_num].bytes += length;
1955                 frames_processed++;
1956         }
1957
1958         if (adapter->state != VNIC_CLOSING)
1959                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1960
1961         if (frames_processed < budget) {
1962                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1963                 napi_complete_done(napi, frames_processed);
1964                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1965                     napi_reschedule(napi)) {
1966                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1967                         goto restart_poll;
1968                 }
1969         }
1970         return frames_processed;
1971 }
1972
1973 #ifdef CONFIG_NET_POLL_CONTROLLER
1974 static void ibmvnic_netpoll_controller(struct net_device *dev)
1975 {
1976         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1977         int i;
1978
1979         replenish_pools(netdev_priv(dev));
1980         for (i = 0; i < adapter->req_rx_queues; i++)
1981                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1982                                      adapter->rx_scrq[i]);
1983 }
1984 #endif
1985
1986 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1987 {
1988         adapter->fallback.mtu = adapter->req_mtu;
1989         adapter->fallback.rx_queues = adapter->req_rx_queues;
1990         adapter->fallback.tx_queues = adapter->req_tx_queues;
1991         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1992         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1993
1994         init_completion(&adapter->reset_done);
1995         ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1996         adapter->wait_for_reset = true;
1997         wait_for_completion(&adapter->reset_done);
1998
1999         if (adapter->reset_done_rc) {
2000                 adapter->desired.mtu = adapter->fallback.mtu;
2001                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2002                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2003                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2004                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2005
2006                 init_completion(&adapter->reset_done);
2007                 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2008                 wait_for_completion(&adapter->reset_done);
2009         }
2010         adapter->wait_for_reset = false;
2011
2012         return adapter->reset_done_rc;
2013 }
2014
2015 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2016 {
2017         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2018
2019         adapter->desired.mtu = new_mtu + ETH_HLEN;
2020
2021         return wait_for_reset(adapter);
2022 }
2023
2024 static const struct net_device_ops ibmvnic_netdev_ops = {
2025         .ndo_open               = ibmvnic_open,
2026         .ndo_stop               = ibmvnic_close,
2027         .ndo_start_xmit         = ibmvnic_xmit,
2028         .ndo_set_rx_mode        = ibmvnic_set_multi,
2029         .ndo_set_mac_address    = ibmvnic_set_mac,
2030         .ndo_validate_addr      = eth_validate_addr,
2031         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2032 #ifdef CONFIG_NET_POLL_CONTROLLER
2033         .ndo_poll_controller    = ibmvnic_netpoll_controller,
2034 #endif
2035         .ndo_change_mtu         = ibmvnic_change_mtu,
2036 };
2037
2038 /* ethtool functions */
2039
2040 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2041                                       struct ethtool_link_ksettings *cmd)
2042 {
2043         u32 supported, advertising;
2044
2045         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2046                           SUPPORTED_FIBRE);
2047         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2048                             ADVERTISED_FIBRE);
2049         cmd->base.speed = SPEED_1000;
2050         cmd->base.duplex = DUPLEX_FULL;
2051         cmd->base.port = PORT_FIBRE;
2052         cmd->base.phy_address = 0;
2053         cmd->base.autoneg = AUTONEG_ENABLE;
2054
2055         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2056                                                 supported);
2057         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2058                                                 advertising);
2059
2060         return 0;
2061 }
2062
2063 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2064                                 struct ethtool_drvinfo *info)
2065 {
2066         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2067
2068         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2069         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2070         strlcpy(info->fw_version, adapter->fw_version,
2071                 sizeof(info->fw_version));
2072 }
2073
2074 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2075 {
2076         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2077
2078         return adapter->msg_enable;
2079 }
2080
2081 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2082 {
2083         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2084
2085         adapter->msg_enable = data;
2086 }
2087
2088 static u32 ibmvnic_get_link(struct net_device *netdev)
2089 {
2090         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2091
2092         /* Don't need to send a query because we request a logical link up at
2093          * init and then we wait for link state indications
2094          */
2095         return adapter->logical_link_state;
2096 }
2097
2098 static void ibmvnic_get_ringparam(struct net_device *netdev,
2099                                   struct ethtool_ringparam *ring)
2100 {
2101         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2102
2103         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2104         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2105         ring->rx_mini_max_pending = 0;
2106         ring->rx_jumbo_max_pending = 0;
2107         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2108         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2109         ring->rx_mini_pending = 0;
2110         ring->rx_jumbo_pending = 0;
2111 }
2112
2113 static int ibmvnic_set_ringparam(struct net_device *netdev,
2114                                  struct ethtool_ringparam *ring)
2115 {
2116         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2117
2118         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2119             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2120                 netdev_err(netdev, "Invalid request.\n");
2121                 netdev_err(netdev, "Max tx buffers = %llu\n",
2122                            adapter->max_rx_add_entries_per_subcrq);
2123                 netdev_err(netdev, "Max rx buffers = %llu\n",
2124                            adapter->max_tx_entries_per_subcrq);
2125                 return -EINVAL;
2126         }
2127
2128         adapter->desired.rx_entries = ring->rx_pending;
2129         adapter->desired.tx_entries = ring->tx_pending;
2130
2131         return wait_for_reset(adapter);
2132 }
2133
2134 static void ibmvnic_get_channels(struct net_device *netdev,
2135                                  struct ethtool_channels *channels)
2136 {
2137         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2138
2139         channels->max_rx = adapter->max_rx_queues;
2140         channels->max_tx = adapter->max_tx_queues;
2141         channels->max_other = 0;
2142         channels->max_combined = 0;
2143         channels->rx_count = adapter->req_rx_queues;
2144         channels->tx_count = adapter->req_tx_queues;
2145         channels->other_count = 0;
2146         channels->combined_count = 0;
2147 }
2148
2149 static int ibmvnic_set_channels(struct net_device *netdev,
2150                                 struct ethtool_channels *channels)
2151 {
2152         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2153
2154         adapter->desired.rx_queues = channels->rx_count;
2155         adapter->desired.tx_queues = channels->tx_count;
2156
2157         return wait_for_reset(adapter);
2158 }
2159
2160 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2161 {
2162         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2163         int i;
2164
2165         if (stringset != ETH_SS_STATS)
2166                 return;
2167
2168         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2169                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2170
2171         for (i = 0; i < adapter->req_tx_queues; i++) {
2172                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2173                 data += ETH_GSTRING_LEN;
2174
2175                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2176                 data += ETH_GSTRING_LEN;
2177
2178                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2179                 data += ETH_GSTRING_LEN;
2180         }
2181
2182         for (i = 0; i < adapter->req_rx_queues; i++) {
2183                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2184                 data += ETH_GSTRING_LEN;
2185
2186                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2187                 data += ETH_GSTRING_LEN;
2188
2189                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2190                 data += ETH_GSTRING_LEN;
2191         }
2192 }
2193
2194 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2195 {
2196         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2197
2198         switch (sset) {
2199         case ETH_SS_STATS:
2200                 return ARRAY_SIZE(ibmvnic_stats) +
2201                        adapter->req_tx_queues * NUM_TX_STATS +
2202                        adapter->req_rx_queues * NUM_RX_STATS;
2203         default:
2204                 return -EOPNOTSUPP;
2205         }
2206 }
2207
2208 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2209                                       struct ethtool_stats *stats, u64 *data)
2210 {
2211         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2212         union ibmvnic_crq crq;
2213         int i, j;
2214
2215         memset(&crq, 0, sizeof(crq));
2216         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2217         crq.request_statistics.cmd = REQUEST_STATISTICS;
2218         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2219         crq.request_statistics.len =
2220             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2221
2222         /* Wait for data to be written */
2223         init_completion(&adapter->stats_done);
2224         ibmvnic_send_crq(adapter, &crq);
2225         wait_for_completion(&adapter->stats_done);
2226
2227         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2228                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2229                                                 ibmvnic_stats[i].offset));
2230
2231         for (j = 0; j < adapter->req_tx_queues; j++) {
2232                 data[i] = adapter->tx_stats_buffers[j].packets;
2233                 i++;
2234                 data[i] = adapter->tx_stats_buffers[j].bytes;
2235                 i++;
2236                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2237                 i++;
2238         }
2239
2240         for (j = 0; j < adapter->req_rx_queues; j++) {
2241                 data[i] = adapter->rx_stats_buffers[j].packets;
2242                 i++;
2243                 data[i] = adapter->rx_stats_buffers[j].bytes;
2244                 i++;
2245                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2246                 i++;
2247         }
2248 }
2249
2250 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2251         .get_drvinfo            = ibmvnic_get_drvinfo,
2252         .get_msglevel           = ibmvnic_get_msglevel,
2253         .set_msglevel           = ibmvnic_set_msglevel,
2254         .get_link               = ibmvnic_get_link,
2255         .get_ringparam          = ibmvnic_get_ringparam,
2256         .set_ringparam          = ibmvnic_set_ringparam,
2257         .get_channels           = ibmvnic_get_channels,
2258         .set_channels           = ibmvnic_set_channels,
2259         .get_strings            = ibmvnic_get_strings,
2260         .get_sset_count         = ibmvnic_get_sset_count,
2261         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2262         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2263 };
2264
2265 /* Routines for managing CRQs/sCRQs  */
2266
2267 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2268                                    struct ibmvnic_sub_crq_queue *scrq)
2269 {
2270         int rc;
2271
2272         if (scrq->irq) {
2273                 free_irq(scrq->irq, scrq);
2274                 irq_dispose_mapping(scrq->irq);
2275                 scrq->irq = 0;
2276         }
2277
2278         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2279         scrq->cur = 0;
2280
2281         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2282                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2283         return rc;
2284 }
2285
2286 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2287 {
2288         int i, rc;
2289
2290         for (i = 0; i < adapter->req_tx_queues; i++) {
2291                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2292                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2293                 if (rc)
2294                         return rc;
2295         }
2296
2297         for (i = 0; i < adapter->req_rx_queues; i++) {
2298                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2299                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2300                 if (rc)
2301                         return rc;
2302         }
2303
2304         return rc;
2305 }
2306
2307 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2308                                   struct ibmvnic_sub_crq_queue *scrq,
2309                                   bool do_h_free)
2310 {
2311         struct device *dev = &adapter->vdev->dev;
2312         long rc;
2313
2314         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2315
2316         if (do_h_free) {
2317                 /* Close the sub-crqs */
2318                 do {
2319                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2320                                                 adapter->vdev->unit_address,
2321                                                 scrq->crq_num);
2322                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2323
2324                 if (rc) {
2325                         netdev_err(adapter->netdev,
2326                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2327                                    scrq->crq_num, rc);
2328                 }
2329         }
2330
2331         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2332                          DMA_BIDIRECTIONAL);
2333         free_pages((unsigned long)scrq->msgs, 2);
2334         kfree(scrq);
2335 }
2336
2337 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2338                                                         *adapter)
2339 {
2340         struct device *dev = &adapter->vdev->dev;
2341         struct ibmvnic_sub_crq_queue *scrq;
2342         int rc;
2343
2344         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2345         if (!scrq)
2346                 return NULL;
2347
2348         scrq->msgs =
2349                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2350         if (!scrq->msgs) {
2351                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2352                 goto zero_page_failed;
2353         }
2354
2355         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2356                                          DMA_BIDIRECTIONAL);
2357         if (dma_mapping_error(dev, scrq->msg_token)) {
2358                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2359                 goto map_failed;
2360         }
2361
2362         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2363                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2364
2365         if (rc == H_RESOURCE)
2366                 rc = ibmvnic_reset_crq(adapter);
2367
2368         if (rc == H_CLOSED) {
2369                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2370         } else if (rc) {
2371                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2372                 goto reg_failed;
2373         }
2374
2375         scrq->adapter = adapter;
2376         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2377         spin_lock_init(&scrq->lock);
2378
2379         netdev_dbg(adapter->netdev,
2380                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2381                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2382
2383         return scrq;
2384
2385 reg_failed:
2386         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2387                          DMA_BIDIRECTIONAL);
2388 map_failed:
2389         free_pages((unsigned long)scrq->msgs, 2);
2390 zero_page_failed:
2391         kfree(scrq);
2392
2393         return NULL;
2394 }
2395
2396 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2397 {
2398         int i;
2399
2400         if (adapter->tx_scrq) {
2401                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2402                         if (!adapter->tx_scrq[i])
2403                                 continue;
2404
2405                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2406                                    i);
2407                         if (adapter->tx_scrq[i]->irq) {
2408                                 free_irq(adapter->tx_scrq[i]->irq,
2409                                          adapter->tx_scrq[i]);
2410                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2411                                 adapter->tx_scrq[i]->irq = 0;
2412                         }
2413
2414                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2415                                               do_h_free);
2416                 }
2417
2418                 kfree(adapter->tx_scrq);
2419                 adapter->tx_scrq = NULL;
2420                 adapter->num_active_tx_scrqs = 0;
2421         }
2422
2423         if (adapter->rx_scrq) {
2424                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2425                         if (!adapter->rx_scrq[i])
2426                                 continue;
2427
2428                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2429                                    i);
2430                         if (adapter->rx_scrq[i]->irq) {
2431                                 free_irq(adapter->rx_scrq[i]->irq,
2432                                          adapter->rx_scrq[i]);
2433                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2434                                 adapter->rx_scrq[i]->irq = 0;
2435                         }
2436
2437                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2438                                               do_h_free);
2439                 }
2440
2441                 kfree(adapter->rx_scrq);
2442                 adapter->rx_scrq = NULL;
2443                 adapter->num_active_rx_scrqs = 0;
2444         }
2445 }
2446
2447 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2448                             struct ibmvnic_sub_crq_queue *scrq)
2449 {
2450         struct device *dev = &adapter->vdev->dev;
2451         unsigned long rc;
2452
2453         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2454                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2455         if (rc)
2456                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2457                         scrq->hw_irq, rc);
2458         return rc;
2459 }
2460
2461 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2462                            struct ibmvnic_sub_crq_queue *scrq)
2463 {
2464         struct device *dev = &adapter->vdev->dev;
2465         unsigned long rc;
2466
2467         if (scrq->hw_irq > 0x100000000ULL) {
2468                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2469                 return 1;
2470         }
2471
2472         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2473                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2474         if (rc)
2475                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2476                         scrq->hw_irq, rc);
2477         return rc;
2478 }
2479
2480 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2481                                struct ibmvnic_sub_crq_queue *scrq)
2482 {
2483         struct device *dev = &adapter->vdev->dev;
2484         struct ibmvnic_tx_buff *txbuff;
2485         union sub_crq *next;
2486         int index;
2487         int i, j;
2488         u8 first;
2489
2490 restart_loop:
2491         while (pending_scrq(adapter, scrq)) {
2492                 unsigned int pool = scrq->pool_index;
2493                 int num_entries = 0;
2494
2495                 next = ibmvnic_next_scrq(adapter, scrq);
2496                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2497                         if (next->tx_comp.rcs[i]) {
2498                                 dev_err(dev, "tx error %x\n",
2499                                         next->tx_comp.rcs[i]);
2500                                 continue;
2501                         }
2502                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2503                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2504
2505                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2506                                 if (!txbuff->data_dma[j])
2507                                         continue;
2508
2509                                 txbuff->data_dma[j] = 0;
2510                         }
2511                         /* if sub_crq was sent indirectly */
2512                         first = txbuff->indir_arr[0].generic.first;
2513                         if (first == IBMVNIC_CRQ_CMD) {
2514                                 dma_unmap_single(dev, txbuff->indir_dma,
2515                                                  sizeof(txbuff->indir_arr),
2516                                                  DMA_TO_DEVICE);
2517                         }
2518
2519                         if (txbuff->last_frag) {
2520                                 dev_kfree_skb_any(txbuff->skb);
2521                                 txbuff->skb = NULL;
2522                         }
2523
2524                         num_entries += txbuff->num_entries;
2525
2526                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2527                                                      producer_index] = index;
2528                         adapter->tx_pool[pool].producer_index =
2529                             (adapter->tx_pool[pool].producer_index + 1) %
2530                             adapter->req_tx_entries_per_subcrq;
2531                 }
2532                 /* remove tx_comp scrq*/
2533                 next->tx_comp.first = 0;
2534
2535                 if (atomic_sub_return(num_entries, &scrq->used) <=
2536                     (adapter->req_tx_entries_per_subcrq / 2) &&
2537                     __netif_subqueue_stopped(adapter->netdev,
2538                                              scrq->pool_index)) {
2539                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2540                         netdev_info(adapter->netdev, "Started queue %d\n",
2541                                     scrq->pool_index);
2542                 }
2543         }
2544
2545         enable_scrq_irq(adapter, scrq);
2546
2547         if (pending_scrq(adapter, scrq)) {
2548                 disable_scrq_irq(adapter, scrq);
2549                 goto restart_loop;
2550         }
2551
2552         return 0;
2553 }
2554
2555 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2556 {
2557         struct ibmvnic_sub_crq_queue *scrq = instance;
2558         struct ibmvnic_adapter *adapter = scrq->adapter;
2559
2560         disable_scrq_irq(adapter, scrq);
2561         ibmvnic_complete_tx(adapter, scrq);
2562
2563         return IRQ_HANDLED;
2564 }
2565
2566 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2567 {
2568         struct ibmvnic_sub_crq_queue *scrq = instance;
2569         struct ibmvnic_adapter *adapter = scrq->adapter;
2570
2571         /* When booting a kdump kernel we can hit pending interrupts
2572          * prior to completing driver initialization.
2573          */
2574         if (unlikely(adapter->state != VNIC_OPEN))
2575                 return IRQ_NONE;
2576
2577         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2578
2579         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2580                 disable_scrq_irq(adapter, scrq);
2581                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2582         }
2583
2584         return IRQ_HANDLED;
2585 }
2586
2587 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2588 {
2589         struct device *dev = &adapter->vdev->dev;
2590         struct ibmvnic_sub_crq_queue *scrq;
2591         int i = 0, j = 0;
2592         int rc = 0;
2593
2594         for (i = 0; i < adapter->req_tx_queues; i++) {
2595                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2596                            i);
2597                 scrq = adapter->tx_scrq[i];
2598                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2599
2600                 if (!scrq->irq) {
2601                         rc = -EINVAL;
2602                         dev_err(dev, "Error mapping irq\n");
2603                         goto req_tx_irq_failed;
2604                 }
2605
2606                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2607                                  0, "ibmvnic_tx", scrq);
2608
2609                 if (rc) {
2610                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2611                                 scrq->irq, rc);
2612                         irq_dispose_mapping(scrq->irq);
2613                         goto req_tx_irq_failed;
2614                 }
2615         }
2616
2617         for (i = 0; i < adapter->req_rx_queues; i++) {
2618                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2619                            i);
2620                 scrq = adapter->rx_scrq[i];
2621                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2622                 if (!scrq->irq) {
2623                         rc = -EINVAL;
2624                         dev_err(dev, "Error mapping irq\n");
2625                         goto req_rx_irq_failed;
2626                 }
2627                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2628                                  0, "ibmvnic_rx", scrq);
2629                 if (rc) {
2630                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2631                                 scrq->irq, rc);
2632                         irq_dispose_mapping(scrq->irq);
2633                         goto req_rx_irq_failed;
2634                 }
2635         }
2636         return rc;
2637
2638 req_rx_irq_failed:
2639         for (j = 0; j < i; j++) {
2640                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2641                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2642         }
2643         i = adapter->req_tx_queues;
2644 req_tx_irq_failed:
2645         for (j = 0; j < i; j++) {
2646                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2647                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2648         }
2649         release_sub_crqs(adapter, 1);
2650         return rc;
2651 }
2652
2653 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2654 {
2655         struct device *dev = &adapter->vdev->dev;
2656         struct ibmvnic_sub_crq_queue **allqueues;
2657         int registered_queues = 0;
2658         int total_queues;
2659         int more = 0;
2660         int i;
2661
2662         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2663
2664         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2665         if (!allqueues)
2666                 return -1;
2667
2668         for (i = 0; i < total_queues; i++) {
2669                 allqueues[i] = init_sub_crq_queue(adapter);
2670                 if (!allqueues[i]) {
2671                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2672                         break;
2673                 }
2674                 registered_queues++;
2675         }
2676
2677         /* Make sure we were able to register the minimum number of queues */
2678         if (registered_queues <
2679             adapter->min_tx_queues + adapter->min_rx_queues) {
2680                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2681                 goto tx_failed;
2682         }
2683
2684         /* Distribute the failed allocated queues*/
2685         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2686                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2687                 switch (i % 3) {
2688                 case 0:
2689                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2690                                 adapter->req_rx_queues--;
2691                         else
2692                                 more++;
2693                         break;
2694                 case 1:
2695                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2696                                 adapter->req_tx_queues--;
2697                         else
2698                                 more++;
2699                         break;
2700                 }
2701         }
2702
2703         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2704                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2705         if (!adapter->tx_scrq)
2706                 goto tx_failed;
2707
2708         for (i = 0; i < adapter->req_tx_queues; i++) {
2709                 adapter->tx_scrq[i] = allqueues[i];
2710                 adapter->tx_scrq[i]->pool_index = i;
2711                 adapter->num_active_tx_scrqs++;
2712         }
2713
2714         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2715                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2716         if (!adapter->rx_scrq)
2717                 goto rx_failed;
2718
2719         for (i = 0; i < adapter->req_rx_queues; i++) {
2720                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2721                 adapter->rx_scrq[i]->scrq_num = i;
2722                 adapter->num_active_rx_scrqs++;
2723         }
2724
2725         kfree(allqueues);
2726         return 0;
2727
2728 rx_failed:
2729         kfree(adapter->tx_scrq);
2730         adapter->tx_scrq = NULL;
2731 tx_failed:
2732         for (i = 0; i < registered_queues; i++)
2733                 release_sub_crq_queue(adapter, allqueues[i], 1);
2734         kfree(allqueues);
2735         return -1;
2736 }
2737
2738 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2739 {
2740         struct device *dev = &adapter->vdev->dev;
2741         union ibmvnic_crq crq;
2742         int max_entries;
2743
2744         if (!retry) {
2745                 /* Sub-CRQ entries are 32 byte long */
2746                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2747
2748                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2749                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2750                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2751                         return;
2752                 }
2753
2754                 if (adapter->desired.mtu)
2755                         adapter->req_mtu = adapter->desired.mtu;
2756                 else
2757                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2758
2759                 if (!adapter->desired.tx_entries)
2760                         adapter->desired.tx_entries =
2761                                         adapter->max_tx_entries_per_subcrq;
2762                 if (!adapter->desired.rx_entries)
2763                         adapter->desired.rx_entries =
2764                                         adapter->max_rx_add_entries_per_subcrq;
2765
2766                 max_entries = IBMVNIC_MAX_LTB_SIZE /
2767                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2768
2769                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2770                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2771                         adapter->desired.tx_entries = max_entries;
2772                 }
2773
2774                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2775                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2776                         adapter->desired.rx_entries = max_entries;
2777                 }
2778
2779                 if (adapter->desired.tx_entries)
2780                         adapter->req_tx_entries_per_subcrq =
2781                                         adapter->desired.tx_entries;
2782                 else
2783                         adapter->req_tx_entries_per_subcrq =
2784                                         adapter->max_tx_entries_per_subcrq;
2785
2786                 if (adapter->desired.rx_entries)
2787                         adapter->req_rx_add_entries_per_subcrq =
2788                                         adapter->desired.rx_entries;
2789                 else
2790                         adapter->req_rx_add_entries_per_subcrq =
2791                                         adapter->max_rx_add_entries_per_subcrq;
2792
2793                 if (adapter->desired.tx_queues)
2794                         adapter->req_tx_queues =
2795                                         adapter->desired.tx_queues;
2796                 else
2797                         adapter->req_tx_queues =
2798                                         adapter->opt_tx_comp_sub_queues;
2799
2800                 if (adapter->desired.rx_queues)
2801                         adapter->req_rx_queues =
2802                                         adapter->desired.rx_queues;
2803                 else
2804                         adapter->req_rx_queues =
2805                                         adapter->opt_rx_comp_queues;
2806
2807                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2808         }
2809
2810         memset(&crq, 0, sizeof(crq));
2811         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2812         crq.request_capability.cmd = REQUEST_CAPABILITY;
2813
2814         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2815         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2816         atomic_inc(&adapter->running_cap_crqs);
2817         ibmvnic_send_crq(adapter, &crq);
2818
2819         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2820         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2821         atomic_inc(&adapter->running_cap_crqs);
2822         ibmvnic_send_crq(adapter, &crq);
2823
2824         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2825         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2826         atomic_inc(&adapter->running_cap_crqs);
2827         ibmvnic_send_crq(adapter, &crq);
2828
2829         crq.request_capability.capability =
2830             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2831         crq.request_capability.number =
2832             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2833         atomic_inc(&adapter->running_cap_crqs);
2834         ibmvnic_send_crq(adapter, &crq);
2835
2836         crq.request_capability.capability =
2837             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2838         crq.request_capability.number =
2839             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2840         atomic_inc(&adapter->running_cap_crqs);
2841         ibmvnic_send_crq(adapter, &crq);
2842
2843         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2844         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2845         atomic_inc(&adapter->running_cap_crqs);
2846         ibmvnic_send_crq(adapter, &crq);
2847
2848         if (adapter->netdev->flags & IFF_PROMISC) {
2849                 if (adapter->promisc_supported) {
2850                         crq.request_capability.capability =
2851                             cpu_to_be16(PROMISC_REQUESTED);
2852                         crq.request_capability.number = cpu_to_be64(1);
2853                         atomic_inc(&adapter->running_cap_crqs);
2854                         ibmvnic_send_crq(adapter, &crq);
2855                 }
2856         } else {
2857                 crq.request_capability.capability =
2858                     cpu_to_be16(PROMISC_REQUESTED);
2859                 crq.request_capability.number = cpu_to_be64(0);
2860                 atomic_inc(&adapter->running_cap_crqs);
2861                 ibmvnic_send_crq(adapter, &crq);
2862         }
2863 }
2864
2865 static int pending_scrq(struct ibmvnic_adapter *adapter,
2866                         struct ibmvnic_sub_crq_queue *scrq)
2867 {
2868         union sub_crq *entry = &scrq->msgs[scrq->cur];
2869
2870         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2871                 return 1;
2872         else
2873                 return 0;
2874 }
2875
2876 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2877                                         struct ibmvnic_sub_crq_queue *scrq)
2878 {
2879         union sub_crq *entry;
2880         unsigned long flags;
2881
2882         spin_lock_irqsave(&scrq->lock, flags);
2883         entry = &scrq->msgs[scrq->cur];
2884         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2885                 if (++scrq->cur == scrq->size)
2886                         scrq->cur = 0;
2887         } else {
2888                 entry = NULL;
2889         }
2890         spin_unlock_irqrestore(&scrq->lock, flags);
2891
2892         return entry;
2893 }
2894
2895 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2896 {
2897         struct ibmvnic_crq_queue *queue = &adapter->crq;
2898         union ibmvnic_crq *crq;
2899
2900         crq = &queue->msgs[queue->cur];
2901         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2902                 if (++queue->cur == queue->size)
2903                         queue->cur = 0;
2904         } else {
2905                 crq = NULL;
2906         }
2907
2908         return crq;
2909 }
2910
2911 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2912                        union sub_crq *sub_crq)
2913 {
2914         unsigned int ua = adapter->vdev->unit_address;
2915         struct device *dev = &adapter->vdev->dev;
2916         u64 *u64_crq = (u64 *)sub_crq;
2917         int rc;
2918
2919         netdev_dbg(adapter->netdev,
2920                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2921                    (unsigned long int)cpu_to_be64(remote_handle),
2922                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2923                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2924                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2925                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2926
2927         /* Make sure the hypervisor sees the complete request */
2928         mb();
2929
2930         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2931                                 cpu_to_be64(remote_handle),
2932                                 cpu_to_be64(u64_crq[0]),
2933                                 cpu_to_be64(u64_crq[1]),
2934                                 cpu_to_be64(u64_crq[2]),
2935                                 cpu_to_be64(u64_crq[3]));
2936
2937         if (rc) {
2938                 if (rc == H_CLOSED)
2939                         dev_warn(dev, "CRQ Queue closed\n");
2940                 dev_err(dev, "Send error (rc=%d)\n", rc);
2941         }
2942
2943         return rc;
2944 }
2945
2946 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2947                                 u64 remote_handle, u64 ioba, u64 num_entries)
2948 {
2949         unsigned int ua = adapter->vdev->unit_address;
2950         struct device *dev = &adapter->vdev->dev;
2951         int rc;
2952
2953         /* Make sure the hypervisor sees the complete request */
2954         mb();
2955         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2956                                 cpu_to_be64(remote_handle),
2957                                 ioba, num_entries);
2958
2959         if (rc) {
2960                 if (rc == H_CLOSED)
2961                         dev_warn(dev, "CRQ Queue closed\n");
2962                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2963         }
2964
2965         return rc;
2966 }
2967
2968 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2969                             union ibmvnic_crq *crq)
2970 {
2971         unsigned int ua = adapter->vdev->unit_address;
2972         struct device *dev = &adapter->vdev->dev;
2973         u64 *u64_crq = (u64 *)crq;
2974         int rc;
2975
2976         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2977                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2978                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2979
2980         /* Make sure the hypervisor sees the complete request */
2981         mb();
2982
2983         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2984                                 cpu_to_be64(u64_crq[0]),
2985                                 cpu_to_be64(u64_crq[1]));
2986
2987         if (rc) {
2988                 if (rc == H_CLOSED) {
2989                         dev_warn(dev, "CRQ Queue closed\n");
2990                         if (adapter->resetting)
2991                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2992                 }
2993
2994                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2995         }
2996
2997         return rc;
2998 }
2999
3000 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3001 {
3002         union ibmvnic_crq crq;
3003
3004         memset(&crq, 0, sizeof(crq));
3005         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3006         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3007         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3008
3009         return ibmvnic_send_crq(adapter, &crq);
3010 }
3011
3012 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3013 {
3014         union ibmvnic_crq crq;
3015
3016         memset(&crq, 0, sizeof(crq));
3017         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3018         crq.version_exchange.cmd = VERSION_EXCHANGE;
3019         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3020
3021         return ibmvnic_send_crq(adapter, &crq);
3022 }
3023
3024 struct vnic_login_client_data {
3025         u8      type;
3026         __be16  len;
3027         char    name;
3028 } __packed;
3029
3030 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3031 {
3032         int len;
3033
3034         /* Calculate the amount of buffer space needed for the
3035          * vnic client data in the login buffer. There are four entries,
3036          * OS name, LPAR name, device name, and a null last entry.
3037          */
3038         len = 4 * sizeof(struct vnic_login_client_data);
3039         len += 6; /* "Linux" plus NULL */
3040         len += strlen(utsname()->nodename) + 1;
3041         len += strlen(adapter->netdev->name) + 1;
3042
3043         return len;
3044 }
3045
3046 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3047                                  struct vnic_login_client_data *vlcd)
3048 {
3049         const char *os_name = "Linux";
3050         int len;
3051
3052         /* Type 1 - LPAR OS */
3053         vlcd->type = 1;
3054         len = strlen(os_name) + 1;
3055         vlcd->len = cpu_to_be16(len);
3056         strncpy(&vlcd->name, os_name, len);
3057         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3058
3059         /* Type 2 - LPAR name */
3060         vlcd->type = 2;
3061         len = strlen(utsname()->nodename) + 1;
3062         vlcd->len = cpu_to_be16(len);
3063         strncpy(&vlcd->name, utsname()->nodename, len);
3064         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3065
3066         /* Type 3 - device name */
3067         vlcd->type = 3;
3068         len = strlen(adapter->netdev->name) + 1;
3069         vlcd->len = cpu_to_be16(len);
3070         strncpy(&vlcd->name, adapter->netdev->name, len);
3071 }
3072
3073 static void send_login(struct ibmvnic_adapter *adapter)
3074 {
3075         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3076         struct ibmvnic_login_buffer *login_buffer;
3077         struct device *dev = &adapter->vdev->dev;
3078         dma_addr_t rsp_buffer_token;
3079         dma_addr_t buffer_token;
3080         size_t rsp_buffer_size;
3081         union ibmvnic_crq crq;
3082         size_t buffer_size;
3083         __be64 *tx_list_p;
3084         __be64 *rx_list_p;
3085         int client_data_len;
3086         struct vnic_login_client_data *vlcd;
3087         int i;
3088
3089         release_login_rsp_buffer(adapter);
3090         client_data_len = vnic_client_data_len(adapter);
3091
3092         buffer_size =
3093             sizeof(struct ibmvnic_login_buffer) +
3094             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3095             client_data_len;
3096
3097         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3098         if (!login_buffer)
3099                 goto buf_alloc_failed;
3100
3101         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3102                                       DMA_TO_DEVICE);
3103         if (dma_mapping_error(dev, buffer_token)) {
3104                 dev_err(dev, "Couldn't map login buffer\n");
3105                 goto buf_map_failed;
3106         }
3107
3108         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3109                           sizeof(u64) * adapter->req_tx_queues +
3110                           sizeof(u64) * adapter->req_rx_queues +
3111                           sizeof(u64) * adapter->req_rx_queues +
3112                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3113
3114         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3115         if (!login_rsp_buffer)
3116                 goto buf_rsp_alloc_failed;
3117
3118         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3119                                           rsp_buffer_size, DMA_FROM_DEVICE);
3120         if (dma_mapping_error(dev, rsp_buffer_token)) {
3121                 dev_err(dev, "Couldn't map login rsp buffer\n");
3122                 goto buf_rsp_map_failed;
3123         }
3124
3125         adapter->login_buf = login_buffer;
3126         adapter->login_buf_token = buffer_token;
3127         adapter->login_buf_sz = buffer_size;
3128         adapter->login_rsp_buf = login_rsp_buffer;
3129         adapter->login_rsp_buf_token = rsp_buffer_token;
3130         adapter->login_rsp_buf_sz = rsp_buffer_size;
3131
3132         login_buffer->len = cpu_to_be32(buffer_size);
3133         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3134         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3135         login_buffer->off_txcomp_subcrqs =
3136             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3137         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3138         login_buffer->off_rxcomp_subcrqs =
3139             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3140                         sizeof(u64) * adapter->req_tx_queues);
3141         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3142         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3143
3144         tx_list_p = (__be64 *)((char *)login_buffer +
3145                                       sizeof(struct ibmvnic_login_buffer));
3146         rx_list_p = (__be64 *)((char *)login_buffer +
3147                                       sizeof(struct ibmvnic_login_buffer) +
3148                                       sizeof(u64) * adapter->req_tx_queues);
3149
3150         for (i = 0; i < adapter->req_tx_queues; i++) {
3151                 if (adapter->tx_scrq[i]) {
3152                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3153                                                    crq_num);
3154                 }
3155         }
3156
3157         for (i = 0; i < adapter->req_rx_queues; i++) {
3158                 if (adapter->rx_scrq[i]) {
3159                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3160                                                    crq_num);
3161                 }
3162         }
3163
3164         /* Insert vNIC login client data */
3165         vlcd = (struct vnic_login_client_data *)
3166                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3167         login_buffer->client_data_offset =
3168                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3169         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3170
3171         vnic_add_client_data(adapter, vlcd);
3172
3173         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3174         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3175                 netdev_dbg(adapter->netdev, "%016lx\n",
3176                            ((unsigned long int *)(adapter->login_buf))[i]);
3177         }
3178
3179         memset(&crq, 0, sizeof(crq));
3180         crq.login.first = IBMVNIC_CRQ_CMD;
3181         crq.login.cmd = LOGIN;
3182         crq.login.ioba = cpu_to_be32(buffer_token);
3183         crq.login.len = cpu_to_be32(buffer_size);
3184         ibmvnic_send_crq(adapter, &crq);
3185
3186         return;
3187
3188 buf_rsp_map_failed:
3189         kfree(login_rsp_buffer);
3190 buf_rsp_alloc_failed:
3191         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3192 buf_map_failed:
3193         kfree(login_buffer);
3194 buf_alloc_failed:
3195         return;
3196 }
3197
3198 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3199                              u32 len, u8 map_id)
3200 {
3201         union ibmvnic_crq crq;
3202
3203         memset(&crq, 0, sizeof(crq));
3204         crq.request_map.first = IBMVNIC_CRQ_CMD;
3205         crq.request_map.cmd = REQUEST_MAP;
3206         crq.request_map.map_id = map_id;
3207         crq.request_map.ioba = cpu_to_be32(addr);
3208         crq.request_map.len = cpu_to_be32(len);
3209         ibmvnic_send_crq(adapter, &crq);
3210 }
3211
3212 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3213 {
3214         union ibmvnic_crq crq;
3215
3216         memset(&crq, 0, sizeof(crq));
3217         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3218         crq.request_unmap.cmd = REQUEST_UNMAP;
3219         crq.request_unmap.map_id = map_id;
3220         ibmvnic_send_crq(adapter, &crq);
3221 }
3222
3223 static void send_map_query(struct ibmvnic_adapter *adapter)
3224 {
3225         union ibmvnic_crq crq;
3226
3227         memset(&crq, 0, sizeof(crq));
3228         crq.query_map.first = IBMVNIC_CRQ_CMD;
3229         crq.query_map.cmd = QUERY_MAP;
3230         ibmvnic_send_crq(adapter, &crq);
3231 }
3232
3233 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3234 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3235 {
3236         union ibmvnic_crq crq;
3237
3238         atomic_set(&adapter->running_cap_crqs, 0);
3239         memset(&crq, 0, sizeof(crq));
3240         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3241         crq.query_capability.cmd = QUERY_CAPABILITY;
3242
3243         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3244         atomic_inc(&adapter->running_cap_crqs);
3245         ibmvnic_send_crq(adapter, &crq);
3246
3247         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3248         atomic_inc(&adapter->running_cap_crqs);
3249         ibmvnic_send_crq(adapter, &crq);
3250
3251         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3252         atomic_inc(&adapter->running_cap_crqs);
3253         ibmvnic_send_crq(adapter, &crq);
3254
3255         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3256         atomic_inc(&adapter->running_cap_crqs);
3257         ibmvnic_send_crq(adapter, &crq);
3258
3259         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3260         atomic_inc(&adapter->running_cap_crqs);
3261         ibmvnic_send_crq(adapter, &crq);
3262
3263         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3264         atomic_inc(&adapter->running_cap_crqs);
3265         ibmvnic_send_crq(adapter, &crq);
3266
3267         crq.query_capability.capability =
3268             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3269         atomic_inc(&adapter->running_cap_crqs);
3270         ibmvnic_send_crq(adapter, &crq);
3271
3272         crq.query_capability.capability =
3273             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3274         atomic_inc(&adapter->running_cap_crqs);
3275         ibmvnic_send_crq(adapter, &crq);
3276
3277         crq.query_capability.capability =
3278             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3279         atomic_inc(&adapter->running_cap_crqs);
3280         ibmvnic_send_crq(adapter, &crq);
3281
3282         crq.query_capability.capability =
3283             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3284         atomic_inc(&adapter->running_cap_crqs);
3285         ibmvnic_send_crq(adapter, &crq);
3286
3287         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3288         atomic_inc(&adapter->running_cap_crqs);
3289         ibmvnic_send_crq(adapter, &crq);
3290
3291         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3292         atomic_inc(&adapter->running_cap_crqs);
3293         ibmvnic_send_crq(adapter, &crq);
3294
3295         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3296         atomic_inc(&adapter->running_cap_crqs);
3297         ibmvnic_send_crq(adapter, &crq);
3298
3299         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3300         atomic_inc(&adapter->running_cap_crqs);
3301         ibmvnic_send_crq(adapter, &crq);
3302
3303         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3304         atomic_inc(&adapter->running_cap_crqs);
3305         ibmvnic_send_crq(adapter, &crq);
3306
3307         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3308         atomic_inc(&adapter->running_cap_crqs);
3309         ibmvnic_send_crq(adapter, &crq);
3310
3311         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3312         atomic_inc(&adapter->running_cap_crqs);
3313         ibmvnic_send_crq(adapter, &crq);
3314
3315         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3316         atomic_inc(&adapter->running_cap_crqs);
3317         ibmvnic_send_crq(adapter, &crq);
3318
3319         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3320         atomic_inc(&adapter->running_cap_crqs);
3321         ibmvnic_send_crq(adapter, &crq);
3322
3323         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3324         atomic_inc(&adapter->running_cap_crqs);
3325         ibmvnic_send_crq(adapter, &crq);
3326
3327         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3328         atomic_inc(&adapter->running_cap_crqs);
3329         ibmvnic_send_crq(adapter, &crq);
3330
3331         crq.query_capability.capability =
3332                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3333         atomic_inc(&adapter->running_cap_crqs);
3334         ibmvnic_send_crq(adapter, &crq);
3335
3336         crq.query_capability.capability =
3337                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3338         atomic_inc(&adapter->running_cap_crqs);
3339         ibmvnic_send_crq(adapter, &crq);
3340
3341         crq.query_capability.capability =
3342                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3343         atomic_inc(&adapter->running_cap_crqs);
3344         ibmvnic_send_crq(adapter, &crq);
3345
3346         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3347         atomic_inc(&adapter->running_cap_crqs);
3348         ibmvnic_send_crq(adapter, &crq);
3349 }
3350
3351 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3352                                 struct ibmvnic_adapter *adapter)
3353 {
3354         struct device *dev = &adapter->vdev->dev;
3355
3356         if (crq->get_vpd_size_rsp.rc.code) {
3357                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3358                         crq->get_vpd_size_rsp.rc.code);
3359                 complete(&adapter->fw_done);
3360                 return;
3361         }
3362
3363         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3364         complete(&adapter->fw_done);
3365 }
3366
3367 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3368                            struct ibmvnic_adapter *adapter)
3369 {
3370         struct device *dev = &adapter->vdev->dev;
3371         unsigned char *substr = NULL;
3372         u8 fw_level_len = 0;
3373
3374         memset(adapter->fw_version, 0, 32);
3375
3376         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3377                          DMA_FROM_DEVICE);
3378
3379         if (crq->get_vpd_rsp.rc.code) {
3380                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3381                         crq->get_vpd_rsp.rc.code);
3382                 goto complete;
3383         }
3384
3385         /* get the position of the firmware version info
3386          * located after the ASCII 'RM' substring in the buffer
3387          */
3388         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3389         if (!substr) {
3390                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3391                 goto complete;
3392         }
3393
3394         /* get length of firmware level ASCII substring */
3395         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3396                 fw_level_len = *(substr + 2);
3397         } else {
3398                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3399                 goto complete;
3400         }
3401
3402         /* copy firmware version string from vpd into adapter */
3403         if ((substr + 3 + fw_level_len) <
3404             (adapter->vpd->buff + adapter->vpd->len)) {
3405                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3406         } else {
3407                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3408         }
3409
3410 complete:
3411         if (adapter->fw_version[0] == '\0')
3412                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3413         complete(&adapter->fw_done);
3414 }
3415
3416 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3417 {
3418         struct device *dev = &adapter->vdev->dev;
3419         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3420         union ibmvnic_crq crq;
3421         int i;
3422
3423         dma_unmap_single(dev, adapter->ip_offload_tok,
3424                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3425
3426         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3427         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3428                 netdev_dbg(adapter->netdev, "%016lx\n",
3429                            ((unsigned long int *)(buf))[i]);
3430
3431         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3432         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3433         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3434                    buf->tcp_ipv4_chksum);
3435         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3436                    buf->tcp_ipv6_chksum);
3437         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3438                    buf->udp_ipv4_chksum);
3439         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3440                    buf->udp_ipv6_chksum);
3441         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3442                    buf->large_tx_ipv4);
3443         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3444                    buf->large_tx_ipv6);
3445         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3446                    buf->large_rx_ipv4);
3447         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3448                    buf->large_rx_ipv6);
3449         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3450                    buf->max_ipv4_header_size);
3451         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3452                    buf->max_ipv6_header_size);
3453         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3454                    buf->max_tcp_header_size);
3455         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3456                    buf->max_udp_header_size);
3457         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3458                    buf->max_large_tx_size);
3459         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3460                    buf->max_large_rx_size);
3461         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3462                    buf->ipv6_extension_header);
3463         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3464                    buf->tcp_pseudosum_req);
3465         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3466                    buf->num_ipv6_ext_headers);
3467         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3468                    buf->off_ipv6_ext_headers);
3469
3470         adapter->ip_offload_ctrl_tok =
3471             dma_map_single(dev, &adapter->ip_offload_ctrl,
3472                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3473
3474         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3475                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3476                 return;
3477         }
3478
3479         adapter->ip_offload_ctrl.len =
3480             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3481         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3482         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3483         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3484         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3485         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3486         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3487         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3488         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3489         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3490
3491         /* large_rx disabled for now, additional features needed */
3492         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3493         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3494
3495         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3496
3497         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3498                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3499
3500         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3501                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3502
3503         if ((adapter->netdev->features &
3504             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3505                 adapter->netdev->features |= NETIF_F_RXCSUM;
3506
3507         if (buf->large_tx_ipv4)
3508                 adapter->netdev->features |= NETIF_F_TSO;
3509         if (buf->large_tx_ipv6)
3510                 adapter->netdev->features |= NETIF_F_TSO6;
3511
3512         adapter->netdev->hw_features |= adapter->netdev->features;
3513
3514         memset(&crq, 0, sizeof(crq));
3515         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3516         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3517         crq.control_ip_offload.len =
3518             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3519         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3520         ibmvnic_send_crq(adapter, &crq);
3521 }
3522
3523 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3524                                   struct ibmvnic_adapter *adapter)
3525 {
3526         struct device *dev = &adapter->vdev->dev;
3527         struct ibmvnic_error_buff *error_buff, *tmp;
3528         unsigned long flags;
3529         bool found = false;
3530         int i;
3531
3532         if (!crq->request_error_rsp.rc.code) {
3533                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3534                          crq->request_error_rsp.rc.code);
3535                 return;
3536         }
3537
3538         spin_lock_irqsave(&adapter->error_list_lock, flags);
3539         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3540                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3541                         found = true;
3542                         list_del(&error_buff->list);
3543                         break;
3544                 }
3545         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3546
3547         if (!found) {
3548                 dev_err(dev, "Couldn't find error id %x\n",
3549                         be32_to_cpu(crq->request_error_rsp.error_id));
3550                 return;
3551         }
3552
3553         dev_err(dev, "Detailed info for error id %x:",
3554                 be32_to_cpu(crq->request_error_rsp.error_id));
3555
3556         for (i = 0; i < error_buff->len; i++) {
3557                 pr_cont("%02x", (int)error_buff->buff[i]);
3558                 if (i % 8 == 7)
3559                         pr_cont(" ");
3560         }
3561         pr_cont("\n");
3562
3563         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3564                          DMA_FROM_DEVICE);
3565         kfree(error_buff->buff);
3566         kfree(error_buff);
3567 }
3568
3569 static void request_error_information(struct ibmvnic_adapter *adapter,
3570                                       union ibmvnic_crq *err_crq)
3571 {
3572         struct device *dev = &adapter->vdev->dev;
3573         struct net_device *netdev = adapter->netdev;
3574         struct ibmvnic_error_buff *error_buff;
3575         unsigned long timeout = msecs_to_jiffies(30000);
3576         union ibmvnic_crq crq;
3577         unsigned long flags;
3578         int rc, detail_len;
3579
3580         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3581         if (!error_buff)
3582                 return;
3583
3584         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3585         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3586         if (!error_buff->buff) {
3587                 kfree(error_buff);
3588                 return;
3589         }
3590
3591         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3592                                          DMA_FROM_DEVICE);
3593         if (dma_mapping_error(dev, error_buff->dma)) {
3594                 netdev_err(netdev, "Couldn't map error buffer\n");
3595                 kfree(error_buff->buff);
3596                 kfree(error_buff);
3597                 return;
3598         }
3599
3600         error_buff->len = detail_len;
3601         error_buff->error_id = err_crq->error_indication.error_id;
3602
3603         spin_lock_irqsave(&adapter->error_list_lock, flags);
3604         list_add_tail(&error_buff->list, &adapter->errors);
3605         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3606
3607         memset(&crq, 0, sizeof(crq));
3608         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3609         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3610         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3611         crq.request_error_info.len = cpu_to_be32(detail_len);
3612         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3613
3614         rc = ibmvnic_send_crq(adapter, &crq);
3615         if (rc) {
3616                 netdev_err(netdev, "failed to request error information\n");
3617                 goto err_info_fail;
3618         }
3619
3620         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3621                 netdev_err(netdev, "timeout waiting for error information\n");
3622                 goto err_info_fail;
3623         }
3624
3625         return;
3626
3627 err_info_fail:
3628         spin_lock_irqsave(&adapter->error_list_lock, flags);
3629         list_del(&error_buff->list);
3630         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3631
3632         kfree(error_buff->buff);
3633         kfree(error_buff);
3634 }
3635
3636 static void handle_error_indication(union ibmvnic_crq *crq,
3637                                     struct ibmvnic_adapter *adapter)
3638 {
3639         struct device *dev = &adapter->vdev->dev;
3640
3641         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3642                 crq->error_indication.flags
3643                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3644                 be32_to_cpu(crq->error_indication.error_id),
3645                 be16_to_cpu(crq->error_indication.error_cause));
3646
3647         if (be32_to_cpu(crq->error_indication.error_id))
3648                 request_error_information(adapter, crq);
3649
3650         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3651                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3652         else
3653                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3654 }
3655
3656 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3657                                  struct ibmvnic_adapter *adapter)
3658 {
3659         struct net_device *netdev = adapter->netdev;
3660         struct device *dev = &adapter->vdev->dev;
3661         long rc;
3662
3663         rc = crq->change_mac_addr_rsp.rc.code;
3664         if (rc) {
3665                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3666                 goto out;
3667         }
3668         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3669                ETH_ALEN);
3670 out:
3671         complete(&adapter->fw_done);
3672         return rc;
3673 }
3674
3675 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3676                                    struct ibmvnic_adapter *adapter)
3677 {
3678         struct device *dev = &adapter->vdev->dev;
3679         u64 *req_value;
3680         char *name;
3681
3682         atomic_dec(&adapter->running_cap_crqs);
3683         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3684         case REQ_TX_QUEUES:
3685                 req_value = &adapter->req_tx_queues;
3686                 name = "tx";
3687                 break;
3688         case REQ_RX_QUEUES:
3689                 req_value = &adapter->req_rx_queues;
3690                 name = "rx";
3691                 break;
3692         case REQ_RX_ADD_QUEUES:
3693                 req_value = &adapter->req_rx_add_queues;
3694                 name = "rx_add";
3695                 break;
3696         case REQ_TX_ENTRIES_PER_SUBCRQ:
3697                 req_value = &adapter->req_tx_entries_per_subcrq;
3698                 name = "tx_entries_per_subcrq";
3699                 break;
3700         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3701                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3702                 name = "rx_add_entries_per_subcrq";
3703                 break;
3704         case REQ_MTU:
3705                 req_value = &adapter->req_mtu;
3706                 name = "mtu";
3707                 break;
3708         case PROMISC_REQUESTED:
3709                 req_value = &adapter->promisc;
3710                 name = "promisc";
3711                 break;
3712         default:
3713                 dev_err(dev, "Got invalid cap request rsp %d\n",
3714                         crq->request_capability.capability);
3715                 return;
3716         }
3717
3718         switch (crq->request_capability_rsp.rc.code) {
3719         case SUCCESS:
3720                 break;
3721         case PARTIALSUCCESS:
3722                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3723                          *req_value,
3724                          (long int)be64_to_cpu(crq->request_capability_rsp.
3725                                                number), name);
3726
3727                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3728                     REQ_MTU) {
3729                         pr_err("mtu of %llu is not supported. Reverting.\n",
3730                                *req_value);
3731                         *req_value = adapter->fallback.mtu;
3732                 } else {
3733                         *req_value =
3734                                 be64_to_cpu(crq->request_capability_rsp.number);
3735                 }
3736
3737                 ibmvnic_send_req_caps(adapter, 1);
3738                 return;
3739         default:
3740                 dev_err(dev, "Error %d in request cap rsp\n",
3741                         crq->request_capability_rsp.rc.code);
3742                 return;
3743         }
3744
3745         /* Done receiving requested capabilities, query IP offload support */
3746         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3747                 union ibmvnic_crq newcrq;
3748                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3749                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3750                     &adapter->ip_offload_buf;
3751
3752                 adapter->wait_capability = false;
3753                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3754                                                          buf_sz,
3755                                                          DMA_FROM_DEVICE);
3756
3757                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3758                         if (!firmware_has_feature(FW_FEATURE_CMO))
3759                                 dev_err(dev, "Couldn't map offload buffer\n");
3760                         return;
3761                 }
3762
3763                 memset(&newcrq, 0, sizeof(newcrq));
3764                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3765                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3766                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3767                 newcrq.query_ip_offload.ioba =
3768                     cpu_to_be32(adapter->ip_offload_tok);
3769
3770                 ibmvnic_send_crq(adapter, &newcrq);
3771         }
3772 }
3773
3774 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3775                             struct ibmvnic_adapter *adapter)
3776 {
3777         struct device *dev = &adapter->vdev->dev;
3778         struct net_device *netdev = adapter->netdev;
3779         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3780         struct ibmvnic_login_buffer *login = adapter->login_buf;
3781         int i;
3782
3783         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3784                          DMA_BIDIRECTIONAL);
3785         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3786                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3787
3788         /* If the number of queues requested can't be allocated by the
3789          * server, the login response will return with code 1. We will need
3790          * to resend the login buffer with fewer queues requested.
3791          */
3792         if (login_rsp_crq->generic.rc.code) {
3793                 adapter->renegotiate = true;
3794                 complete(&adapter->init_done);
3795                 return 0;
3796         }
3797
3798         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3799
3800         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3801         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3802                 netdev_dbg(adapter->netdev, "%016lx\n",
3803                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3804         }
3805
3806         /* Sanity checks */
3807         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3808             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3809              adapter->req_rx_add_queues !=
3810              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3811                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3812                 ibmvnic_remove(adapter->vdev);
3813                 return -EIO;
3814         }
3815         release_login_buffer(adapter);
3816         complete(&adapter->init_done);
3817
3818         return 0;
3819 }
3820
3821 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3822                                      struct ibmvnic_adapter *adapter)
3823 {
3824         struct device *dev = &adapter->vdev->dev;
3825         long rc;
3826
3827         rc = crq->request_unmap_rsp.rc.code;
3828         if (rc)
3829                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3830 }
3831
3832 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3833                                  struct ibmvnic_adapter *adapter)
3834 {
3835         struct net_device *netdev = adapter->netdev;
3836         struct device *dev = &adapter->vdev->dev;
3837         long rc;
3838
3839         rc = crq->query_map_rsp.rc.code;
3840         if (rc) {
3841                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3842                 return;
3843         }
3844         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3845                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3846                    crq->query_map_rsp.free_pages);
3847 }
3848
3849 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3850                                  struct ibmvnic_adapter *adapter)
3851 {
3852         struct net_device *netdev = adapter->netdev;
3853         struct device *dev = &adapter->vdev->dev;
3854         long rc;
3855
3856         atomic_dec(&adapter->running_cap_crqs);
3857         netdev_dbg(netdev, "Outstanding queries: %d\n",
3858                    atomic_read(&adapter->running_cap_crqs));
3859         rc = crq->query_capability.rc.code;
3860         if (rc) {
3861                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3862                 goto out;
3863         }
3864
3865         switch (be16_to_cpu(crq->query_capability.capability)) {
3866         case MIN_TX_QUEUES:
3867                 adapter->min_tx_queues =
3868                     be64_to_cpu(crq->query_capability.number);
3869                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3870                            adapter->min_tx_queues);
3871                 break;
3872         case MIN_RX_QUEUES:
3873                 adapter->min_rx_queues =
3874                     be64_to_cpu(crq->query_capability.number);
3875                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3876                            adapter->min_rx_queues);
3877                 break;
3878         case MIN_RX_ADD_QUEUES:
3879                 adapter->min_rx_add_queues =
3880                     be64_to_cpu(crq->query_capability.number);
3881                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3882                            adapter->min_rx_add_queues);
3883                 break;
3884         case MAX_TX_QUEUES:
3885                 adapter->max_tx_queues =
3886                     be64_to_cpu(crq->query_capability.number);
3887                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3888                            adapter->max_tx_queues);
3889                 break;
3890         case MAX_RX_QUEUES:
3891                 adapter->max_rx_queues =
3892                     be64_to_cpu(crq->query_capability.number);
3893                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3894                            adapter->max_rx_queues);
3895                 break;
3896         case MAX_RX_ADD_QUEUES:
3897                 adapter->max_rx_add_queues =
3898                     be64_to_cpu(crq->query_capability.number);
3899                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3900                            adapter->max_rx_add_queues);
3901                 break;
3902         case MIN_TX_ENTRIES_PER_SUBCRQ:
3903                 adapter->min_tx_entries_per_subcrq =
3904                     be64_to_cpu(crq->query_capability.number);
3905                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3906                            adapter->min_tx_entries_per_subcrq);
3907                 break;
3908         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3909                 adapter->min_rx_add_entries_per_subcrq =
3910                     be64_to_cpu(crq->query_capability.number);
3911                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3912                            adapter->min_rx_add_entries_per_subcrq);
3913                 break;
3914         case MAX_TX_ENTRIES_PER_SUBCRQ:
3915                 adapter->max_tx_entries_per_subcrq =
3916                     be64_to_cpu(crq->query_capability.number);
3917                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3918                            adapter->max_tx_entries_per_subcrq);
3919                 break;
3920         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3921                 adapter->max_rx_add_entries_per_subcrq =
3922                     be64_to_cpu(crq->query_capability.number);
3923                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3924                            adapter->max_rx_add_entries_per_subcrq);
3925                 break;
3926         case TCP_IP_OFFLOAD:
3927                 adapter->tcp_ip_offload =
3928                     be64_to_cpu(crq->query_capability.number);
3929                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3930                            adapter->tcp_ip_offload);
3931                 break;
3932         case PROMISC_SUPPORTED:
3933                 adapter->promisc_supported =
3934                     be64_to_cpu(crq->query_capability.number);
3935                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3936                            adapter->promisc_supported);
3937                 break;
3938         case MIN_MTU:
3939                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3940                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3941                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3942                 break;
3943         case MAX_MTU:
3944                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3945                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3946                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3947                 break;
3948         case MAX_MULTICAST_FILTERS:
3949                 adapter->max_multicast_filters =
3950                     be64_to_cpu(crq->query_capability.number);
3951                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3952                            adapter->max_multicast_filters);
3953                 break;
3954         case VLAN_HEADER_INSERTION:
3955                 adapter->vlan_header_insertion =
3956                     be64_to_cpu(crq->query_capability.number);
3957                 if (adapter->vlan_header_insertion)
3958                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3959                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3960                            adapter->vlan_header_insertion);
3961                 break;
3962         case RX_VLAN_HEADER_INSERTION:
3963                 adapter->rx_vlan_header_insertion =
3964                     be64_to_cpu(crq->query_capability.number);
3965                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3966                            adapter->rx_vlan_header_insertion);
3967                 break;
3968         case MAX_TX_SG_ENTRIES:
3969                 adapter->max_tx_sg_entries =
3970                     be64_to_cpu(crq->query_capability.number);
3971                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3972                            adapter->max_tx_sg_entries);
3973                 break;
3974         case RX_SG_SUPPORTED:
3975                 adapter->rx_sg_supported =
3976                     be64_to_cpu(crq->query_capability.number);
3977                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3978                            adapter->rx_sg_supported);
3979                 break;
3980         case OPT_TX_COMP_SUB_QUEUES:
3981                 adapter->opt_tx_comp_sub_queues =
3982                     be64_to_cpu(crq->query_capability.number);
3983                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3984                            adapter->opt_tx_comp_sub_queues);
3985                 break;
3986         case OPT_RX_COMP_QUEUES:
3987                 adapter->opt_rx_comp_queues =
3988                     be64_to_cpu(crq->query_capability.number);
3989                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3990                            adapter->opt_rx_comp_queues);
3991                 break;
3992         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3993                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3994                     be64_to_cpu(crq->query_capability.number);
3995                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3996                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3997                 break;
3998         case OPT_TX_ENTRIES_PER_SUBCRQ:
3999                 adapter->opt_tx_entries_per_subcrq =
4000                     be64_to_cpu(crq->query_capability.number);
4001                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4002                            adapter->opt_tx_entries_per_subcrq);
4003                 break;
4004         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4005                 adapter->opt_rxba_entries_per_subcrq =
4006                     be64_to_cpu(crq->query_capability.number);
4007                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4008                            adapter->opt_rxba_entries_per_subcrq);
4009                 break;
4010         case TX_RX_DESC_REQ:
4011                 adapter->tx_rx_desc_req = crq->query_capability.number;
4012                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4013                            adapter->tx_rx_desc_req);
4014                 break;
4015
4016         default:
4017                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4018                            crq->query_capability.capability);
4019         }
4020
4021 out:
4022         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4023                 adapter->wait_capability = false;
4024                 ibmvnic_send_req_caps(adapter, 0);
4025         }
4026 }
4027
4028 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4029                                struct ibmvnic_adapter *adapter)
4030 {
4031         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4032         struct net_device *netdev = adapter->netdev;
4033         struct device *dev = &adapter->vdev->dev;
4034         u64 *u64_crq = (u64 *)crq;
4035         long rc;
4036
4037         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4038                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4039                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4040         switch (gen_crq->first) {
4041         case IBMVNIC_CRQ_INIT_RSP:
4042                 switch (gen_crq->cmd) {
4043                 case IBMVNIC_CRQ_INIT:
4044                         dev_info(dev, "Partner initialized\n");
4045                         adapter->from_passive_init = true;
4046                         complete(&adapter->init_done);
4047                         break;
4048                 case IBMVNIC_CRQ_INIT_COMPLETE:
4049                         dev_info(dev, "Partner initialization complete\n");
4050                         send_version_xchg(adapter);
4051                         break;
4052                 default:
4053                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4054                 }
4055                 return;
4056         case IBMVNIC_CRQ_XPORT_EVENT:
4057                 netif_carrier_off(netdev);
4058                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4059                         dev_info(dev, "Migrated, re-enabling adapter\n");
4060                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4061                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4062                         dev_info(dev, "Backing device failover detected\n");
4063                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4064                 } else {
4065                         /* The adapter lost the connection */
4066                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4067                                 gen_crq->cmd);
4068                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4069                 }
4070                 return;
4071         case IBMVNIC_CRQ_CMD_RSP:
4072                 break;
4073         default:
4074                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4075                         gen_crq->first);
4076                 return;
4077         }
4078
4079         switch (gen_crq->cmd) {
4080         case VERSION_EXCHANGE_RSP:
4081                 rc = crq->version_exchange_rsp.rc.code;
4082                 if (rc) {
4083                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4084                         break;
4085                 }
4086                 dev_info(dev, "Partner protocol version is %d\n",
4087                          crq->version_exchange_rsp.version);
4088                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4089                     ibmvnic_version)
4090                         ibmvnic_version =
4091                             be16_to_cpu(crq->version_exchange_rsp.version);
4092                 send_cap_queries(adapter);
4093                 break;
4094         case QUERY_CAPABILITY_RSP:
4095                 handle_query_cap_rsp(crq, adapter);
4096                 break;
4097         case QUERY_MAP_RSP:
4098                 handle_query_map_rsp(crq, adapter);
4099                 break;
4100         case REQUEST_MAP_RSP:
4101                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4102                 complete(&adapter->fw_done);
4103                 break;
4104         case REQUEST_UNMAP_RSP:
4105                 handle_request_unmap_rsp(crq, adapter);
4106                 break;
4107         case REQUEST_CAPABILITY_RSP:
4108                 handle_request_cap_rsp(crq, adapter);
4109                 break;
4110         case LOGIN_RSP:
4111                 netdev_dbg(netdev, "Got Login Response\n");
4112                 handle_login_rsp(crq, adapter);
4113                 break;
4114         case LOGICAL_LINK_STATE_RSP:
4115                 netdev_dbg(netdev,
4116                            "Got Logical Link State Response, state: %d rc: %d\n",
4117                            crq->logical_link_state_rsp.link_state,
4118                            crq->logical_link_state_rsp.rc.code);
4119                 adapter->logical_link_state =
4120                     crq->logical_link_state_rsp.link_state;
4121                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4122                 complete(&adapter->init_done);
4123                 break;
4124         case LINK_STATE_INDICATION:
4125                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4126                 adapter->phys_link_state =
4127                     crq->link_state_indication.phys_link_state;
4128                 adapter->logical_link_state =
4129                     crq->link_state_indication.logical_link_state;
4130                 break;
4131         case CHANGE_MAC_ADDR_RSP:
4132                 netdev_dbg(netdev, "Got MAC address change Response\n");
4133                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4134                 break;
4135         case ERROR_INDICATION:
4136                 netdev_dbg(netdev, "Got Error Indication\n");
4137                 handle_error_indication(crq, adapter);
4138                 break;
4139         case REQUEST_ERROR_RSP:
4140                 netdev_dbg(netdev, "Got Error Detail Response\n");
4141                 handle_error_info_rsp(crq, adapter);
4142                 break;
4143         case REQUEST_STATISTICS_RSP:
4144                 netdev_dbg(netdev, "Got Statistics Response\n");
4145                 complete(&adapter->stats_done);
4146                 break;
4147         case QUERY_IP_OFFLOAD_RSP:
4148                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4149                 handle_query_ip_offload_rsp(adapter);
4150                 break;
4151         case MULTICAST_CTRL_RSP:
4152                 netdev_dbg(netdev, "Got multicast control Response\n");
4153                 break;
4154         case CONTROL_IP_OFFLOAD_RSP:
4155                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4156                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4157                                  sizeof(adapter->ip_offload_ctrl),
4158                                  DMA_TO_DEVICE);
4159                 complete(&adapter->init_done);
4160                 break;
4161         case COLLECT_FW_TRACE_RSP:
4162                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4163                 complete(&adapter->fw_done);
4164                 break;
4165         case GET_VPD_SIZE_RSP:
4166                 handle_vpd_size_rsp(crq, adapter);
4167                 break;
4168         case GET_VPD_RSP:
4169                 handle_vpd_rsp(crq, adapter);
4170                 break;
4171         default:
4172                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4173                            gen_crq->cmd);
4174         }
4175 }
4176
4177 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4178 {
4179         struct ibmvnic_adapter *adapter = instance;
4180
4181         tasklet_schedule(&adapter->tasklet);
4182         return IRQ_HANDLED;
4183 }
4184
4185 static void ibmvnic_tasklet(void *data)
4186 {
4187         struct ibmvnic_adapter *adapter = data;
4188         struct ibmvnic_crq_queue *queue = &adapter->crq;
4189         union ibmvnic_crq *crq;
4190         unsigned long flags;
4191         bool done = false;
4192
4193         spin_lock_irqsave(&queue->lock, flags);
4194         while (!done) {
4195                 /* Pull all the valid messages off the CRQ */
4196                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4197                         ibmvnic_handle_crq(crq, adapter);
4198                         crq->generic.first = 0;
4199                 }
4200
4201                 /* remain in tasklet until all
4202                  * capabilities responses are received
4203                  */
4204                 if (!adapter->wait_capability)
4205                         done = true;
4206         }
4207         /* if capabilities CRQ's were sent in this tasklet, the following
4208          * tasklet must wait until all responses are received
4209          */
4210         if (atomic_read(&adapter->running_cap_crqs) != 0)
4211                 adapter->wait_capability = true;
4212         spin_unlock_irqrestore(&queue->lock, flags);
4213 }
4214
4215 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4216 {
4217         struct vio_dev *vdev = adapter->vdev;
4218         int rc;
4219
4220         do {
4221                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4222         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4223
4224         if (rc)
4225                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4226
4227         return rc;
4228 }
4229
4230 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4231 {
4232         struct ibmvnic_crq_queue *crq = &adapter->crq;
4233         struct device *dev = &adapter->vdev->dev;
4234         struct vio_dev *vdev = adapter->vdev;
4235         int rc;
4236
4237         /* Close the CRQ */
4238         do {
4239                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4240         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4241
4242         /* Clean out the queue */
4243         memset(crq->msgs, 0, PAGE_SIZE);
4244         crq->cur = 0;
4245
4246         /* And re-open it again */
4247         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4248                                 crq->msg_token, PAGE_SIZE);
4249
4250         if (rc == H_CLOSED)
4251                 /* Adapter is good, but other end is not ready */
4252                 dev_warn(dev, "Partner adapter not ready\n");
4253         else if (rc != 0)
4254                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4255
4256         return rc;
4257 }
4258
4259 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4260 {
4261         struct ibmvnic_crq_queue *crq = &adapter->crq;
4262         struct vio_dev *vdev = adapter->vdev;
4263         long rc;
4264
4265         if (!crq->msgs)
4266                 return;
4267
4268         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4269         free_irq(vdev->irq, adapter);
4270         tasklet_kill(&adapter->tasklet);
4271         do {
4272                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4273         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4274
4275         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4276                          DMA_BIDIRECTIONAL);
4277         free_page((unsigned long)crq->msgs);
4278         crq->msgs = NULL;
4279 }
4280
4281 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4282 {
4283         struct ibmvnic_crq_queue *crq = &adapter->crq;
4284         struct device *dev = &adapter->vdev->dev;
4285         struct vio_dev *vdev = adapter->vdev;
4286         int rc, retrc = -ENOMEM;
4287
4288         if (crq->msgs)
4289                 return 0;
4290
4291         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4292         /* Should we allocate more than one page? */
4293
4294         if (!crq->msgs)
4295                 return -ENOMEM;
4296
4297         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4298         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4299                                         DMA_BIDIRECTIONAL);
4300         if (dma_mapping_error(dev, crq->msg_token))
4301                 goto map_failed;
4302
4303         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4304                                 crq->msg_token, PAGE_SIZE);
4305
4306         if (rc == H_RESOURCE)
4307                 /* maybe kexecing and resource is busy. try a reset */
4308                 rc = ibmvnic_reset_crq(adapter);
4309         retrc = rc;
4310
4311         if (rc == H_CLOSED) {
4312                 dev_warn(dev, "Partner adapter not ready\n");
4313         } else if (rc) {
4314                 dev_warn(dev, "Error %d opening adapter\n", rc);
4315                 goto reg_crq_failed;
4316         }
4317
4318         retrc = 0;
4319
4320         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4321                      (unsigned long)adapter);
4322
4323         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4324         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4325                          adapter);
4326         if (rc) {
4327                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4328                         vdev->irq, rc);
4329                 goto req_irq_failed;
4330         }
4331
4332         rc = vio_enable_interrupts(vdev);
4333         if (rc) {
4334                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4335                 goto req_irq_failed;
4336         }
4337
4338         crq->cur = 0;
4339         spin_lock_init(&crq->lock);
4340
4341         return retrc;
4342
4343 req_irq_failed:
4344         tasklet_kill(&adapter->tasklet);
4345         do {
4346                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4347         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4348 reg_crq_failed:
4349         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4350 map_failed:
4351         free_page((unsigned long)crq->msgs);
4352         crq->msgs = NULL;
4353         return retrc;
4354 }
4355
4356 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4357 {
4358         struct device *dev = &adapter->vdev->dev;
4359         unsigned long timeout = msecs_to_jiffies(30000);
4360         u64 old_num_rx_queues, old_num_tx_queues;
4361         int rc;
4362
4363         if (adapter->resetting && !adapter->wait_for_reset) {
4364                 rc = ibmvnic_reset_crq(adapter);
4365                 if (!rc)
4366                         rc = vio_enable_interrupts(adapter->vdev);
4367         } else {
4368                 rc = init_crq_queue(adapter);
4369         }
4370
4371         if (rc) {
4372                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4373                 return rc;
4374         }
4375
4376         adapter->from_passive_init = false;
4377
4378         old_num_rx_queues = adapter->req_rx_queues;
4379         old_num_tx_queues = adapter->req_tx_queues;
4380
4381         init_completion(&adapter->init_done);
4382         adapter->init_done_rc = 0;
4383         ibmvnic_send_crq_init(adapter);
4384         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4385                 dev_err(dev, "Initialization sequence timed out\n");
4386                 return -1;
4387         }
4388
4389         if (adapter->init_done_rc) {
4390                 release_crq_queue(adapter);
4391                 return adapter->init_done_rc;
4392         }
4393
4394         if (adapter->from_passive_init) {
4395                 adapter->state = VNIC_OPEN;
4396                 adapter->from_passive_init = false;
4397                 return -1;
4398         }
4399
4400         if (adapter->resetting && !adapter->wait_for_reset) {
4401                 if (adapter->req_rx_queues != old_num_rx_queues ||
4402                     adapter->req_tx_queues != old_num_tx_queues) {
4403                         release_sub_crqs(adapter, 0);
4404                         rc = init_sub_crqs(adapter);
4405                 } else {
4406                         rc = reset_sub_crq_queues(adapter);
4407                 }
4408         } else {
4409                 rc = init_sub_crqs(adapter);
4410         }
4411
4412         if (rc) {
4413                 dev_err(dev, "Initialization of sub crqs failed\n");
4414                 release_crq_queue(adapter);
4415                 return rc;
4416         }
4417
4418         rc = init_sub_crq_irqs(adapter);
4419         if (rc) {
4420                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4421                 release_crq_queue(adapter);
4422         }
4423
4424         rc = init_stats_buffers(adapter);
4425         if (rc)
4426                 return rc;
4427
4428         rc = init_stats_token(adapter);
4429         if (rc)
4430                 return rc;
4431
4432         return rc;
4433 }
4434
4435 static struct device_attribute dev_attr_failover;
4436
4437 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4438 {
4439         struct ibmvnic_adapter *adapter;
4440         struct net_device *netdev;
4441         unsigned char *mac_addr_p;
4442         int rc;
4443
4444         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4445                 dev->unit_address);
4446
4447         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4448                                                         VETH_MAC_ADDR, NULL);
4449         if (!mac_addr_p) {
4450                 dev_err(&dev->dev,
4451                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4452                         __FILE__, __LINE__);
4453                 return 0;
4454         }
4455
4456         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4457                                    IBMVNIC_MAX_QUEUES);
4458         if (!netdev)
4459                 return -ENOMEM;
4460
4461         adapter = netdev_priv(netdev);
4462         adapter->state = VNIC_PROBING;
4463         dev_set_drvdata(&dev->dev, netdev);
4464         adapter->vdev = dev;
4465         adapter->netdev = netdev;
4466
4467         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4468         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4469         netdev->irq = dev->irq;
4470         netdev->netdev_ops = &ibmvnic_netdev_ops;
4471         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4472         SET_NETDEV_DEV(netdev, &dev->dev);
4473
4474         spin_lock_init(&adapter->stats_lock);
4475
4476         INIT_LIST_HEAD(&adapter->errors);
4477         spin_lock_init(&adapter->error_list_lock);
4478
4479         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4480         INIT_LIST_HEAD(&adapter->rwi_list);
4481         mutex_init(&adapter->reset_lock);
4482         mutex_init(&adapter->rwi_lock);
4483         adapter->resetting = false;
4484
4485         adapter->mac_change_pending = false;
4486
4487         do {
4488                 rc = ibmvnic_init(adapter);
4489                 if (rc && rc != EAGAIN)
4490                         goto ibmvnic_init_fail;
4491         } while (rc == EAGAIN);
4492
4493         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4494         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4495         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4496
4497         rc = device_create_file(&dev->dev, &dev_attr_failover);
4498         if (rc)
4499                 goto ibmvnic_init_fail;
4500
4501         netif_carrier_off(netdev);
4502         rc = register_netdev(netdev);
4503         if (rc) {
4504                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4505                 goto ibmvnic_register_fail;
4506         }
4507         dev_info(&dev->dev, "ibmvnic registered\n");
4508
4509         adapter->state = VNIC_PROBED;
4510
4511         adapter->wait_for_reset = false;
4512
4513         return 0;
4514
4515 ibmvnic_register_fail:
4516         device_remove_file(&dev->dev, &dev_attr_failover);
4517
4518 ibmvnic_init_fail:
4519         release_sub_crqs(adapter, 1);
4520         release_crq_queue(adapter);
4521         free_netdev(netdev);
4522
4523         return rc;
4524 }
4525
4526 static int ibmvnic_remove(struct vio_dev *dev)
4527 {
4528         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4529         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4530
4531         adapter->state = VNIC_REMOVING;
4532         unregister_netdev(netdev);
4533         mutex_lock(&adapter->reset_lock);
4534
4535         release_resources(adapter);
4536         release_sub_crqs(adapter, 1);
4537         release_crq_queue(adapter);
4538
4539         release_stats_token(adapter);
4540         release_stats_buffers(adapter);
4541
4542         adapter->state = VNIC_REMOVED;
4543
4544         mutex_unlock(&adapter->reset_lock);
4545         device_remove_file(&dev->dev, &dev_attr_failover);
4546         free_netdev(netdev);
4547         dev_set_drvdata(&dev->dev, NULL);
4548
4549         return 0;
4550 }
4551
4552 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4553                               const char *buf, size_t count)
4554 {
4555         struct net_device *netdev = dev_get_drvdata(dev);
4556         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4557         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4558         __be64 session_token;
4559         long rc;
4560
4561         if (!sysfs_streq(buf, "1"))
4562                 return -EINVAL;
4563
4564         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4565                          H_GET_SESSION_TOKEN, 0, 0, 0);
4566         if (rc) {
4567                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4568                            rc);
4569                 return -EINVAL;
4570         }
4571
4572         session_token = (__be64)retbuf[0];
4573         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4574                    be64_to_cpu(session_token));
4575         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4576                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4577         if (rc) {
4578                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4579                            rc);
4580                 return -EINVAL;
4581         }
4582
4583         return count;
4584 }
4585
4586 static DEVICE_ATTR_WO(failover);
4587
4588 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4589 {
4590         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4591         struct ibmvnic_adapter *adapter;
4592         struct iommu_table *tbl;
4593         unsigned long ret = 0;
4594         int i;
4595
4596         tbl = get_iommu_table_base(&vdev->dev);
4597
4598         /* netdev inits at probe time along with the structures we need below*/
4599         if (!netdev)
4600                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4601
4602         adapter = netdev_priv(netdev);
4603
4604         ret += PAGE_SIZE; /* the crq message queue */
4605         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4606
4607         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4608                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4609
4610         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4611              i++)
4612                 ret += adapter->rx_pool[i].size *
4613                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4614
4615         return ret;
4616 }
4617
4618 static int ibmvnic_resume(struct device *dev)
4619 {
4620         struct net_device *netdev = dev_get_drvdata(dev);
4621         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4622
4623         if (adapter->state != VNIC_OPEN)
4624                 return 0;
4625
4626         tasklet_schedule(&adapter->tasklet);
4627
4628         return 0;
4629 }
4630
4631 static const struct vio_device_id ibmvnic_device_table[] = {
4632         {"network", "IBM,vnic"},
4633         {"", "" }
4634 };
4635 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4636
4637 static const struct dev_pm_ops ibmvnic_pm_ops = {
4638         .resume = ibmvnic_resume
4639 };
4640
4641 static struct vio_driver ibmvnic_driver = {
4642         .id_table       = ibmvnic_device_table,
4643         .probe          = ibmvnic_probe,
4644         .remove         = ibmvnic_remove,
4645         .get_desired_dma = ibmvnic_get_desired_dma,
4646         .name           = ibmvnic_driver_name,
4647         .pm             = &ibmvnic_pm_ops,
4648 };
4649
4650 /* module functions */
4651 static int __init ibmvnic_module_init(void)
4652 {
4653         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4654                 IBMVNIC_DRIVER_VERSION);
4655
4656         return vio_register_driver(&ibmvnic_driver);
4657 }
4658
4659 static void __exit ibmvnic_module_exit(void)
4660 {
4661         vio_unregister_driver(&ibmvnic_driver);
4662 }
4663
4664 module_init(ibmvnic_module_init);
4665 module_exit(ibmvnic_module_exit);