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 int 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                 rc = send_login(adapter);
 813                 if (rc) {
 814                         dev_err(dev, "Unable to attempt device login\n");
 815                         return rc;
 816                 } else if (!wait_for_completion_timeout(&adapter->init_done,
 817                                                  timeout)) {
 818                         dev_err(dev, "Login timeout\n");
 819                         return -1;
 820                 }
 821         } while (adapter->renegotiate);
 822
 823         /* handle pending MAC address changes after successful login */
 824         if (adapter->mac_change_pending) {
 825                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 826                 adapter->mac_change_pending = false;
 827         }
 828
 829         return 0;
 830 }
 831
 832 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 833 {
 834         kfree(adapter->login_buf);
 835         adapter->login_buf = NULL;
 836 }
 837
 838 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 839 {
 840         kfree(adapter->login_rsp_buf);
 841         adapter->login_rsp_buf = NULL;
 842 }
 843
 844 static void release_resources(struct ibmvnic_adapter *adapter)
 845 {
 846         release_vpd_data(adapter);
 847
 848         release_tx_pools(adapter);
 849         release_rx_pools(adapter);
 850
 851         release_error_buffers(adapter);
 852         release_napi(adapter);
 853         release_login_rsp_buffer(adapter);
 854 }
 855
 856 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 857 {
 858         struct net_device *netdev = adapter->netdev;
 859         unsigned long timeout = msecs_to_jiffies(30000);
 860         union ibmvnic_crq crq;
 861         bool resend;
 862         int rc;
 863
 864         netdev_dbg(netdev, "setting link state %d\n", link_state);
 865
 866         memset(&crq, 0, sizeof(crq));
 867         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 868         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 869         crq.logical_link_state.link_state = link_state;
 870
 871         do {
 872                 resend = false;
 873
 874                 reinit_completion(&adapter->init_done);
 875                 rc = ibmvnic_send_crq(adapter, &crq);
 876                 if (rc) {
 877                         netdev_err(netdev, "Failed to set link state\n");
 878                         return rc;
 879                 }
 880
 881                 if (!wait_for_completion_timeout(&adapter->init_done,
 882                                                  timeout)) {
 883                         netdev_err(netdev, "timeout setting link state\n");
 884                         return -1;
 885                 }
 886
 887                 if (adapter->init_done_rc == 1) {
 888                         /* Partuial success, delay and re-send */
 889                         mdelay(1000);
 890                         resend = true;
 891                 }
 892         } while (resend);
 893
 894         return 0;
 895 }
 896
 897 static int set_real_num_queues(struct net_device *netdev)
 898 {
 899         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 900         int rc;
 901
 902         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 903                    adapter->req_tx_queues, adapter->req_rx_queues);
 904
 905         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 906         if (rc) {
 907                 netdev_err(netdev, "failed to set the number of tx queues\n");
 908                 return rc;
 909         }
 910
 911         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 912         if (rc)
 913                 netdev_err(netdev, "failed to set the number of rx queues\n");
 914
 915         return rc;
 916 }
 917
 918 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 919 {
 920         struct device *dev = &adapter->vdev->dev;
 921         union ibmvnic_crq crq;
 922         int len = 0;
 923
 924         if (adapter->vpd->buff)
 925                 len = adapter->vpd->len;
 926
 927         init_completion(&adapter->fw_done);
 928         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 929         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 930         ibmvnic_send_crq(adapter, &crq);
 931         wait_for_completion(&adapter->fw_done);
 932
 933         if (!adapter->vpd->len)
 934                 return -ENODATA;
 935
 936         if (!adapter->vpd->buff)
 937                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 938         else if (adapter->vpd->len != len)
 939                 adapter->vpd->buff =
 940                         krealloc(adapter->vpd->buff,
 941                                  adapter->vpd->len, GFP_KERNEL);
 942
 943         if (!adapter->vpd->buff) {
 944                 dev_err(dev, "Could allocate VPD buffer\n");
 945                 return -ENOMEM;
 946         }
 947
 948         adapter->vpd->dma_addr =
 949                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 950                                DMA_FROM_DEVICE);
 951         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 952                 dev_err(dev, "Could not map VPD buffer\n");
 953                 kfree(adapter->vpd->buff);
 954                 adapter->vpd->buff = NULL;
 955                 return -ENOMEM;
 956         }
 957
 958         reinit_completion(&adapter->fw_done);
 959         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 960         crq.get_vpd.cmd = GET_VPD;
 961         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 962         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
 963         ibmvnic_send_crq(adapter, &crq);
 964         wait_for_completion(&adapter->fw_done);
 965
 966         return 0;
 967 }
 968
 969 static int init_resources(struct ibmvnic_adapter *adapter)
 970 {
 971         struct net_device *netdev = adapter->netdev;
 972         int rc;
 973
 974         rc = set_real_num_queues(netdev);
 975         if (rc)
 976                 return rc;
 977
 978         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
 979         if (!adapter->vpd)
 980                 return -ENOMEM;
 981
 982         /* Vital Product Data (VPD) */
 983         rc = ibmvnic_get_vpd(adapter);
 984         if (rc) {
 985                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
 986                 return rc;
 987         }
 988
 989         adapter->map_id = 1;
 990
 991         rc = init_napi(adapter);
 992         if (rc)
 993                 return rc;
 994
 995         send_map_query(adapter);
 996
 997         rc = init_rx_pools(netdev);
 998         if (rc)
 999                 return rc;
1000
1001         rc = init_tx_pools(netdev);
1002         return rc;
1003 }
1004
1005 static int __ibmvnic_open(struct net_device *netdev)
1006 {
1007         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1008         enum vnic_state prev_state = adapter->state;
1009         int i, rc;
1010
1011         adapter->state = VNIC_OPENING;
1012         replenish_pools(adapter);
1013         ibmvnic_napi_enable(adapter);
1014
1015         /* We're ready to receive frames, enable the sub-crq interrupts and
1016          * set the logical link state to up
1017          */
1018         for (i = 0; i < adapter->req_rx_queues; i++) {
1019                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1020                 if (prev_state == VNIC_CLOSED)
1021                         enable_irq(adapter->rx_scrq[i]->irq);
1022                 else
1023                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1024         }
1025
1026         for (i = 0; i < adapter->req_tx_queues; i++) {
1027                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1028                 if (prev_state == VNIC_CLOSED)
1029                         enable_irq(adapter->tx_scrq[i]->irq);
1030                 else
1031                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1032         }
1033
1034         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1035         if (rc) {
1036                 for (i = 0; i < adapter->req_rx_queues; i++)
1037                         napi_disable(&adapter->napi[i]);
1038                 release_resources(adapter);
1039                 return rc;
1040         }
1041
1042         netif_tx_start_all_queues(netdev);
1043
1044         if (prev_state == VNIC_CLOSED) {
1045                 for (i = 0; i < adapter->req_rx_queues; i++)
1046                         napi_schedule(&adapter->napi[i]);
1047         }
1048
1049         adapter->state = VNIC_OPEN;
1050         return rc;
1051 }
1052
1053 static int ibmvnic_open(struct net_device *netdev)
1054 {
1055         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1056         int rc;
1057
1058         mutex_lock(&adapter->reset_lock);
1059
1060         if (adapter->state != VNIC_CLOSED) {
1061                 rc = ibmvnic_login(netdev);
1062                 if (rc) {
1063                         mutex_unlock(&adapter->reset_lock);
1064                         return rc;
1065                 }
1066
1067                 rc = init_resources(adapter);
1068                 if (rc) {
1069                         netdev_err(netdev, "failed to initialize resources\n");
1070                         release_resources(adapter);
1071                         mutex_unlock(&adapter->reset_lock);
1072                         return rc;
1073                 }
1074         }
1075
1076         rc = __ibmvnic_open(netdev);
1077         netif_carrier_on(netdev);
1078
1079         mutex_unlock(&adapter->reset_lock);
1080
1081         return rc;
1082 }
1083
1084 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1085 {
1086         struct ibmvnic_rx_pool *rx_pool;
1087         struct ibmvnic_rx_buff *rx_buff;
1088         u64 rx_entries;
1089         int rx_scrqs;
1090         int i, j;
1091
1092         if (!adapter->rx_pool)
1093                 return;
1094
1095         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
1096         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1097
1098         /* Free any remaining skbs in the rx buffer pools */
1099         for (i = 0; i < rx_scrqs; i++) {
1100                 rx_pool = &adapter->rx_pool[i];
1101                 if (!rx_pool || !rx_pool->rx_buff)
1102                         continue;
1103
1104                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1105                 for (j = 0; j < rx_entries; j++) {
1106                         rx_buff = &rx_pool->rx_buff[j];
1107                         if (rx_buff && rx_buff->skb) {
1108                                 dev_kfree_skb_any(rx_buff->skb);
1109                                 rx_buff->skb = NULL;
1110                         }
1111                 }
1112         }
1113 }
1114
1115 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1116 {
1117         struct ibmvnic_tx_pool *tx_pool;
1118         struct ibmvnic_tx_buff *tx_buff;
1119         u64 tx_entries;
1120         int tx_scrqs;
1121         int i, j;
1122
1123         if (!adapter->tx_pool)
1124                 return;
1125
1126         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1127         tx_entries = adapter->req_tx_entries_per_subcrq;
1128
1129         /* Free any remaining skbs in the tx buffer pools */
1130         for (i = 0; i < tx_scrqs; i++) {
1131                 tx_pool = &adapter->tx_pool[i];
1132                 if (!tx_pool && !tx_pool->tx_buff)
1133                         continue;
1134
1135                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1136                 for (j = 0; j < tx_entries; j++) {
1137                         tx_buff = &tx_pool->tx_buff[j];
1138                         if (tx_buff && tx_buff->skb) {
1139                                 dev_kfree_skb_any(tx_buff->skb);
1140                                 tx_buff->skb = NULL;
1141                         }
1142                 }
1143         }
1144 }
1145
1146 static int __ibmvnic_close(struct net_device *netdev)
1147 {
1148         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1149         int rc = 0;
1150         int i;
1151
1152         adapter->state = VNIC_CLOSING;
1153
1154         /* ensure that transmissions are stopped if called by do_reset */
1155         if (adapter->resetting)
1156                 netif_tx_disable(netdev);
1157         else
1158                 netif_tx_stop_all_queues(netdev);
1159
1160         ibmvnic_napi_disable(adapter);
1161
1162         if (adapter->tx_scrq) {
1163                 for (i = 0; i < adapter->req_tx_queues; i++)
1164                         if (adapter->tx_scrq[i]->irq) {
1165                                 netdev_dbg(adapter->netdev,
1166                                            "Disabling tx_scrq[%d] irq\n", i);
1167                                 disable_irq(adapter->tx_scrq[i]->irq);
1168                         }
1169         }
1170
1171         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1172         if (rc)
1173                 return rc;
1174
1175         if (adapter->rx_scrq) {
1176                 for (i = 0; i < adapter->req_rx_queues; i++) {
1177                         int retries = 10;
1178
1179                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1180                                 retries--;
1181                                 mdelay(100);
1182
1183                                 if (retries == 0)
1184                                         break;
1185                         }
1186
1187                         if (adapter->rx_scrq[i]->irq) {
1188                                 netdev_dbg(adapter->netdev,
1189                                            "Disabling rx_scrq[%d] irq\n", i);
1190                                 disable_irq(adapter->rx_scrq[i]->irq);
1191                         }
1192                 }
1193         }
1194         clean_rx_pools(adapter);
1195         clean_tx_pools(adapter);
1196         adapter->state = VNIC_CLOSED;
1197         return rc;
1198 }
1199
1200 static int ibmvnic_close(struct net_device *netdev)
1201 {
1202         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1203         int rc;
1204
1205         mutex_lock(&adapter->reset_lock);
1206         rc = __ibmvnic_close(netdev);
1207         mutex_unlock(&adapter->reset_lock);
1208
1209         return rc;
1210 }
1211
1212 /**
1213  * build_hdr_data - creates L2/L3/L4 header data buffer
1214  * @hdr_field - bitfield determining needed headers
1215  * @skb - socket buffer
1216  * @hdr_len - array of header lengths
1217  * @tot_len - total length of data
1218  *
1219  * Reads hdr_field to determine which headers are needed by firmware.
1220  * Builds a buffer containing these headers.  Saves individual header
1221  * lengths and total buffer length to be used to build descriptors.
1222  */
1223 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1224                           int *hdr_len, u8 *hdr_data)
1225 {
1226         int len = 0;
1227         u8 *hdr;
1228
1229         hdr_len[0] = sizeof(struct ethhdr);
1230
1231         if (skb->protocol == htons(ETH_P_IP)) {
1232                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1233                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1234                         hdr_len[2] = tcp_hdrlen(skb);
1235                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1236                         hdr_len[2] = sizeof(struct udphdr);
1237         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1238                 hdr_len[1] = sizeof(struct ipv6hdr);
1239                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1240                         hdr_len[2] = tcp_hdrlen(skb);
1241                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1242                         hdr_len[2] = sizeof(struct udphdr);
1243         } else if (skb->protocol == htons(ETH_P_ARP)) {
1244                 hdr_len[1] = arp_hdr_len(skb->dev);
1245                 hdr_len[2] = 0;
1246         }
1247
1248         memset(hdr_data, 0, 120);
1249         if ((hdr_field >> 6) & 1) {
1250                 hdr = skb_mac_header(skb);
1251                 memcpy(hdr_data, hdr, hdr_len[0]);
1252                 len += hdr_len[0];
1253         }
1254
1255         if ((hdr_field >> 5) & 1) {
1256                 hdr = skb_network_header(skb);
1257                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1258                 len += hdr_len[1];
1259         }
1260
1261         if ((hdr_field >> 4) & 1) {
1262                 hdr = skb_transport_header(skb);
1263                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1264                 len += hdr_len[2];
1265         }
1266         return len;
1267 }
1268
1269 /**
1270  * create_hdr_descs - create header and header extension descriptors
1271  * @hdr_field - bitfield determining needed headers
1272  * @data - buffer containing header data
1273  * @len - length of data buffer
1274  * @hdr_len - array of individual header lengths
1275  * @scrq_arr - descriptor array
1276  *
1277  * Creates header and, if needed, header extension descriptors and
1278  * places them in a descriptor array, scrq_arr
1279  */
1280
1281 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1282                             union sub_crq *scrq_arr)
1283 {
1284         union sub_crq hdr_desc;
1285         int tmp_len = len;
1286         int num_descs = 0;
1287         u8 *data, *cur;
1288         int tmp;
1289
1290         while (tmp_len > 0) {
1291                 cur = hdr_data + len - tmp_len;
1292
1293                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1294                 if (cur != hdr_data) {
1295                         data = hdr_desc.hdr_ext.data;
1296                         tmp = tmp_len > 29 ? 29 : tmp_len;
1297                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1298                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1299                         hdr_desc.hdr_ext.len = tmp;
1300                 } else {
1301                         data = hdr_desc.hdr.data;
1302                         tmp = tmp_len > 24 ? 24 : tmp_len;
1303                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1304                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1305                         hdr_desc.hdr.len = tmp;
1306                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1307                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1308                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1309                         hdr_desc.hdr.flag = hdr_field << 1;
1310                 }
1311                 memcpy(data, cur, tmp);
1312                 tmp_len -= tmp;
1313                 *scrq_arr = hdr_desc;
1314                 scrq_arr++;
1315                 num_descs++;
1316         }
1317
1318         return num_descs;
1319 }
1320
1321 /**
1322  * build_hdr_descs_arr - build a header descriptor array
1323  * @skb - socket buffer
1324  * @num_entries - number of descriptors to be sent
1325  * @subcrq - first TX descriptor
1326  * @hdr_field - bit field determining which headers will be sent
1327  *
1328  * This function will build a TX descriptor array with applicable
1329  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1330  */
1331
1332 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1333                                 int *num_entries, u8 hdr_field)
1334 {
1335         int hdr_len[3] = {0, 0, 0};
1336         int tot_len;
1337         u8 *hdr_data = txbuff->hdr_data;
1338
1339         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1340                                  txbuff->hdr_data);
1341         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1342                          txbuff->indir_arr + 1);
1343 }
1344
1345 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1346 {
1347         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1348         int queue_num = skb_get_queue_mapping(skb);
1349         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1350         struct device *dev = &adapter->vdev->dev;
1351         struct ibmvnic_tx_buff *tx_buff = NULL;
1352         struct ibmvnic_sub_crq_queue *tx_scrq;
1353         struct ibmvnic_tx_pool *tx_pool;
1354         unsigned int tx_send_failed = 0;
1355         unsigned int tx_map_failed = 0;
1356         unsigned int tx_dropped = 0;
1357         unsigned int tx_packets = 0;
1358         unsigned int tx_bytes = 0;
1359         dma_addr_t data_dma_addr;
1360         struct netdev_queue *txq;
1361         unsigned long lpar_rc;
1362         union sub_crq tx_crq;
1363         unsigned int offset;
1364         int num_entries = 1;
1365         unsigned char *dst;
1366         u64 *handle_array;
1367         int index = 0;
1368         u8 proto = 0;
1369         int ret = 0;
1370
1371         if (adapter->resetting) {
1372                 if (!netif_subqueue_stopped(netdev, skb))
1373                         netif_stop_subqueue(netdev, queue_num);
1374                 dev_kfree_skb_any(skb);
1375
1376                 tx_send_failed++;
1377                 tx_dropped++;
1378                 ret = NETDEV_TX_OK;
1379                 goto out;
1380         }
1381
1382         tx_pool = &adapter->tx_pool[queue_num];
1383         tx_scrq = adapter->tx_scrq[queue_num];
1384         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1385         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1386                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1387
1388         index = tx_pool->free_map[tx_pool->consumer_index];
1389
1390         if (skb_is_gso(skb)) {
1391                 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1392                 dst = tx_pool->tso_ltb.buff + offset;
1393                 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1394                 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1395                 tx_pool->tso_index++;
1396                 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1397                         tx_pool->tso_index = 0;
1398         } else {
1399                 offset = index * adapter->req_mtu;
1400                 dst = tx_pool->long_term_buff.buff + offset;
1401                 memset(dst, 0, adapter->req_mtu);
1402                 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1403         }
1404
1405         if (skb_shinfo(skb)->nr_frags) {
1406                 int cur, i;
1407
1408                 /* Copy the head */
1409                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1410                 cur = skb_headlen(skb);
1411
1412                 /* Copy the frags */
1413                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1414                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1415
1416                         memcpy(dst + cur,
1417                                page_address(skb_frag_page(frag)) +
1418                                frag->page_offset, skb_frag_size(frag));
1419                         cur += skb_frag_size(frag);
1420                 }
1421         } else {
1422                 skb_copy_from_linear_data(skb, dst, skb->len);
1423         }
1424
1425         tx_pool->consumer_index =
1426             (tx_pool->consumer_index + 1) %
1427                 adapter->req_tx_entries_per_subcrq;
1428
1429         tx_buff = &tx_pool->tx_buff[index];
1430         tx_buff->skb = skb;
1431         tx_buff->data_dma[0] = data_dma_addr;
1432         tx_buff->data_len[0] = skb->len;
1433         tx_buff->index = index;
1434         tx_buff->pool_index = queue_num;
1435         tx_buff->last_frag = true;
1436
1437         memset(&tx_crq, 0, sizeof(tx_crq));
1438         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1439         tx_crq.v1.type = IBMVNIC_TX_DESC;
1440         tx_crq.v1.n_crq_elem = 1;
1441         tx_crq.v1.n_sge = 1;
1442         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1443         tx_crq.v1.correlator = cpu_to_be32(index);
1444         if (skb_is_gso(skb))
1445                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1446         else
1447                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1448         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1449         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1450
1451         if (adapter->vlan_header_insertion) {
1452                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1453                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1454         }
1455
1456         if (skb->protocol == htons(ETH_P_IP)) {
1457                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1458                 proto = ip_hdr(skb)->protocol;
1459         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1460                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1461                 proto = ipv6_hdr(skb)->nexthdr;
1462         }
1463
1464         if (proto == IPPROTO_TCP)
1465                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1466         else if (proto == IPPROTO_UDP)
1467                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1468
1469         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1470                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1471                 hdrs += 2;
1472         }
1473         if (skb_is_gso(skb)) {
1474                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1475                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1476                 hdrs += 2;
1477         }
1478         /* determine if l2/3/4 headers are sent to firmware */
1479         if ((*hdrs >> 7) & 1) {
1480                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1481                 tx_crq.v1.n_crq_elem = num_entries;
1482                 tx_buff->num_entries = num_entries;
1483                 tx_buff->indir_arr[0] = tx_crq;
1484                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1485                                                     sizeof(tx_buff->indir_arr),
1486                                                     DMA_TO_DEVICE);
1487                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1488                         dev_kfree_skb_any(skb);
1489                         tx_buff->skb = NULL;
1490                         if (!firmware_has_feature(FW_FEATURE_CMO))
1491                                 dev_err(dev, "tx: unable to map descriptor array\n");
1492                         tx_map_failed++;
1493                         tx_dropped++;
1494                         ret = NETDEV_TX_OK;
1495                         goto out;
1496                 }
1497                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1498                                                (u64)tx_buff->indir_dma,
1499                                                (u64)num_entries);
1500         } else {
1501                 tx_buff->num_entries = num_entries;
1502                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1503                                       &tx_crq);
1504         }
1505         if (lpar_rc != H_SUCCESS) {
1506                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1507
1508                 if (tx_pool->consumer_index == 0)
1509                         tx_pool->consumer_index =
1510                                 adapter->req_tx_entries_per_subcrq - 1;
1511                 else
1512                         tx_pool->consumer_index--;
1513
1514                 dev_kfree_skb_any(skb);
1515                 tx_buff->skb = NULL;
1516
1517                 if (lpar_rc == H_CLOSED) {
1518                         /* Disable TX and report carrier off if queue is closed.
1519                          * Firmware guarantees that a signal will be sent to the
1520                          * driver, triggering a reset or some other action.
1521                          */
1522                         netif_tx_stop_all_queues(netdev);
1523                         netif_carrier_off(netdev);
1524                 }
1525
1526                 tx_send_failed++;
1527                 tx_dropped++;
1528                 ret = NETDEV_TX_OK;
1529                 goto out;
1530         }
1531
1532         if (atomic_add_return(num_entries, &tx_scrq->used)
1533                                         >= adapter->req_tx_entries_per_subcrq) {
1534                 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1535                 netif_stop_subqueue(netdev, queue_num);
1536         }
1537
1538         tx_packets++;
1539         tx_bytes += skb->len;
1540         txq->trans_start = jiffies;
1541         ret = NETDEV_TX_OK;
1542
1543 out:
1544         netdev->stats.tx_dropped += tx_dropped;
1545         netdev->stats.tx_bytes += tx_bytes;
1546         netdev->stats.tx_packets += tx_packets;
1547         adapter->tx_send_failed += tx_send_failed;
1548         adapter->tx_map_failed += tx_map_failed;
1549         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1550         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1551         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1552
1553         return ret;
1554 }
1555
1556 static void ibmvnic_set_multi(struct net_device *netdev)
1557 {
1558         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1559         struct netdev_hw_addr *ha;
1560         union ibmvnic_crq crq;
1561
1562         memset(&crq, 0, sizeof(crq));
1563         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1564         crq.request_capability.cmd = REQUEST_CAPABILITY;
1565
1566         if (netdev->flags & IFF_PROMISC) {
1567                 if (!adapter->promisc_supported)
1568                         return;
1569         } else {
1570                 if (netdev->flags & IFF_ALLMULTI) {
1571                         /* Accept 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_ENABLE_ALL;
1576                         ibmvnic_send_crq(adapter, &crq);
1577                 } else if (netdev_mc_empty(netdev)) {
1578                         /* Reject all multicast */
1579                         memset(&crq, 0, sizeof(crq));
1580                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1581                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1582                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1583                         ibmvnic_send_crq(adapter, &crq);
1584                 } else {
1585                         /* Accept one or more multicast(s) */
1586                         netdev_for_each_mc_addr(ha, netdev) {
1587                                 memset(&crq, 0, sizeof(crq));
1588                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1589                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1590                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1591                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1592                                                 ha->addr);
1593                                 ibmvnic_send_crq(adapter, &crq);
1594                         }
1595                 }
1596         }
1597 }
1598
1599 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1600 {
1601         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1602         struct sockaddr *addr = p;
1603         union ibmvnic_crq crq;
1604
1605         if (!is_valid_ether_addr(addr->sa_data))
1606                 return -EADDRNOTAVAIL;
1607
1608         memset(&crq, 0, sizeof(crq));
1609         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1610         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1611         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1612
1613         init_completion(&adapter->fw_done);
1614         ibmvnic_send_crq(adapter, &crq);
1615         wait_for_completion(&adapter->fw_done);
1616         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1617         return adapter->fw_done_rc ? -EIO : 0;
1618 }
1619
1620 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1621 {
1622         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1623         struct sockaddr *addr = p;
1624         int rc;
1625
1626         if (adapter->state == VNIC_PROBED) {
1627                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1628                 adapter->mac_change_pending = true;
1629                 return 0;
1630         }
1631
1632         rc = __ibmvnic_set_mac(netdev, addr);
1633
1634         return rc;
1635 }
1636
1637 /**
1638  * do_reset returns zero if we are able to keep processing reset events, or
1639  * non-zero if we hit a fatal error and must halt.
1640  */
1641 static int do_reset(struct ibmvnic_adapter *adapter,
1642                     struct ibmvnic_rwi *rwi, u32 reset_state)
1643 {
1644         u64 old_num_rx_queues, old_num_tx_queues;
1645         struct net_device *netdev = adapter->netdev;
1646         int i, rc;
1647
1648         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1649                    rwi->reset_reason);
1650
1651         netif_carrier_off(netdev);
1652         adapter->reset_reason = rwi->reset_reason;
1653
1654         old_num_rx_queues = adapter->req_rx_queues;
1655         old_num_tx_queues = adapter->req_tx_queues;
1656
1657         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1658                 rc = ibmvnic_reenable_crq_queue(adapter);
1659                 if (rc)
1660                         return 0;
1661         }
1662
1663         rc = __ibmvnic_close(netdev);
1664         if (rc)
1665                 return rc;
1666
1667         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1668             adapter->wait_for_reset) {
1669                 release_resources(adapter);
1670                 release_sub_crqs(adapter, 1);
1671                 release_crq_queue(adapter);
1672         }
1673
1674         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1675                 /* remove the closed state so when we call open it appears
1676                  * we are coming from the probed state.
1677                  */
1678                 adapter->state = VNIC_PROBED;
1679
1680                 rc = ibmvnic_init(adapter);
1681                 if (rc)
1682                         return IBMVNIC_INIT_FAILED;
1683
1684                 /* If the adapter was in PROBE state prior to the reset,
1685                  * exit here.
1686                  */
1687                 if (reset_state == VNIC_PROBED)
1688                         return 0;
1689
1690                 rc = ibmvnic_login(netdev);
1691                 if (rc) {
1692                         adapter->state = VNIC_PROBED;
1693                         return 0;
1694                 }
1695
1696                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1697                     adapter->wait_for_reset) {
1698                         rc = init_resources(adapter);
1699                         if (rc)
1700                                 return rc;
1701                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1702                            adapter->req_tx_queues != old_num_tx_queues) {
1703                         adapter->map_id = 1;
1704                         release_rx_pools(adapter);
1705                         release_tx_pools(adapter);
1706                         init_rx_pools(netdev);
1707                         init_tx_pools(netdev);
1708
1709                         release_napi(adapter);
1710                         init_napi(adapter);
1711                 } else {
1712                         rc = reset_tx_pools(adapter);
1713                         if (rc)
1714                                 return rc;
1715
1716                         rc = reset_rx_pools(adapter);
1717                         if (rc)
1718                                 return rc;
1719
1720                         if (reset_state == VNIC_CLOSED)
1721                                 return 0;
1722                 }
1723         }
1724
1725         rc = __ibmvnic_open(netdev);
1726         if (rc) {
1727                 if (list_empty(&adapter->rwi_list))
1728                         adapter->state = VNIC_CLOSED;
1729                 else
1730                         adapter->state = reset_state;
1731
1732                 return 0;
1733         }
1734
1735         /* kick napi */
1736         for (i = 0; i < adapter->req_rx_queues; i++)
1737                 napi_schedule(&adapter->napi[i]);
1738
1739         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1740                 netdev_notify_peers(netdev);
1741
1742         netif_carrier_on(netdev);
1743
1744         return 0;
1745 }
1746
1747 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1748 {
1749         struct ibmvnic_rwi *rwi;
1750
1751         mutex_lock(&adapter->rwi_lock);
1752
1753         if (!list_empty(&adapter->rwi_list)) {
1754                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1755                                        list);
1756                 list_del(&rwi->list);
1757         } else {
1758                 rwi = NULL;
1759         }
1760
1761         mutex_unlock(&adapter->rwi_lock);
1762         return rwi;
1763 }
1764
1765 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1766 {
1767         struct ibmvnic_rwi *rwi;
1768
1769         rwi = get_next_rwi(adapter);
1770         while (rwi) {
1771                 kfree(rwi);
1772                 rwi = get_next_rwi(adapter);
1773         }
1774 }
1775
1776 static void __ibmvnic_reset(struct work_struct *work)
1777 {
1778         struct ibmvnic_rwi *rwi;
1779         struct ibmvnic_adapter *adapter;
1780         struct net_device *netdev;
1781         u32 reset_state;
1782         int rc = 0;
1783
1784         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1785         netdev = adapter->netdev;
1786
1787         mutex_lock(&adapter->reset_lock);
1788         adapter->resetting = true;
1789         reset_state = adapter->state;
1790
1791         rwi = get_next_rwi(adapter);
1792         while (rwi) {
1793                 rc = do_reset(adapter, rwi, reset_state);
1794                 kfree(rwi);
1795                 if (rc && rc != IBMVNIC_INIT_FAILED)
1796                         break;
1797
1798                 rwi = get_next_rwi(adapter);
1799         }
1800
1801         if (adapter->wait_for_reset) {
1802                 adapter->wait_for_reset = false;
1803                 adapter->reset_done_rc = rc;
1804                 complete(&adapter->reset_done);
1805         }
1806
1807         if (rc) {
1808                 netdev_dbg(adapter->netdev, "Reset failed\n");
1809                 free_all_rwi(adapter);
1810                 mutex_unlock(&adapter->reset_lock);
1811                 return;
1812         }
1813
1814         adapter->resetting = false;
1815         mutex_unlock(&adapter->reset_lock);
1816 }
1817
1818 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1819                           enum ibmvnic_reset_reason reason)
1820 {
1821         struct ibmvnic_rwi *rwi, *tmp;
1822         struct net_device *netdev = adapter->netdev;
1823         struct list_head *entry;
1824
1825         if (adapter->state == VNIC_REMOVING ||
1826             adapter->state == VNIC_REMOVED) {
1827                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1828                 return;
1829         }
1830
1831         if (adapter->state == VNIC_PROBING) {
1832                 netdev_warn(netdev, "Adapter reset during probe\n");
1833                 adapter->init_done_rc = EAGAIN;
1834                 return;
1835         }
1836
1837         mutex_lock(&adapter->rwi_lock);
1838
1839         list_for_each(entry, &adapter->rwi_list) {
1840                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1841                 if (tmp->reset_reason == reason) {
1842                         netdev_dbg(netdev, "Skipping matching reset\n");
1843                         mutex_unlock(&adapter->rwi_lock);
1844                         return;
1845                 }
1846         }
1847
1848         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1849         if (!rwi) {
1850                 mutex_unlock(&adapter->rwi_lock);
1851                 ibmvnic_close(netdev);
1852                 return;
1853         }
1854
1855         rwi->reset_reason = reason;
1856         list_add_tail(&rwi->list, &adapter->rwi_list);
1857         mutex_unlock(&adapter->rwi_lock);
1858
1859         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1860         schedule_work(&adapter->ibmvnic_reset);
1861 }
1862
1863 static void ibmvnic_tx_timeout(struct net_device *dev)
1864 {
1865         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1866
1867         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1868 }
1869
1870 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1871                                   struct ibmvnic_rx_buff *rx_buff)
1872 {
1873         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1874
1875         rx_buff->skb = NULL;
1876
1877         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1878         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1879
1880         atomic_dec(&pool->available);
1881 }
1882
1883 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1884 {
1885         struct net_device *netdev = napi->dev;
1886         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1887         int scrq_num = (int)(napi - adapter->napi);
1888         int frames_processed = 0;
1889
1890 restart_poll:
1891         while (frames_processed < budget) {
1892                 struct sk_buff *skb;
1893                 struct ibmvnic_rx_buff *rx_buff;
1894                 union sub_crq *next;
1895                 u32 length;
1896                 u16 offset;
1897                 u8 flags = 0;
1898
1899                 if (unlikely(adapter->resetting &&
1900                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1901                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1902                         napi_complete_done(napi, frames_processed);
1903                         return frames_processed;
1904                 }
1905
1906                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1907                         break;
1908                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1909                 rx_buff =
1910                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1911                                                           rx_comp.correlator);
1912                 /* do error checking */
1913                 if (next->rx_comp.rc) {
1914                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1915                                    be16_to_cpu(next->rx_comp.rc));
1916                         /* free the entry */
1917                         next->rx_comp.first = 0;
1918                         dev_kfree_skb_any(rx_buff->skb);
1919                         remove_buff_from_pool(adapter, rx_buff);
1920                         continue;
1921                 } else if (!rx_buff->skb) {
1922                         /* free the entry */
1923                         next->rx_comp.first = 0;
1924                         remove_buff_from_pool(adapter, rx_buff);
1925                         continue;
1926                 }
1927
1928                 length = be32_to_cpu(next->rx_comp.len);
1929                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1930                 flags = next->rx_comp.flags;
1931                 skb = rx_buff->skb;
1932                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1933                                         length);
1934
1935                 /* VLAN Header has been stripped by the system firmware and
1936                  * needs to be inserted by the driver
1937                  */
1938                 if (adapter->rx_vlan_header_insertion &&
1939                     (flags & IBMVNIC_VLAN_STRIPPED))
1940                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1941                                                ntohs(next->rx_comp.vlan_tci));
1942
1943                 /* free the entry */
1944                 next->rx_comp.first = 0;
1945                 remove_buff_from_pool(adapter, rx_buff);
1946
1947                 skb_put(skb, length);
1948                 skb->protocol = eth_type_trans(skb, netdev);
1949                 skb_record_rx_queue(skb, scrq_num);
1950
1951                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1952                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1953                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1954                 }
1955
1956                 length = skb->len;
1957                 napi_gro_receive(napi, skb); /* send it up */
1958                 netdev->stats.rx_packets++;
1959                 netdev->stats.rx_bytes += length;
1960                 adapter->rx_stats_buffers[scrq_num].packets++;
1961                 adapter->rx_stats_buffers[scrq_num].bytes += length;
1962                 frames_processed++;
1963         }
1964
1965         if (adapter->state != VNIC_CLOSING)
1966                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1967
1968         if (frames_processed < budget) {
1969                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1970                 napi_complete_done(napi, frames_processed);
1971                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1972                     napi_reschedule(napi)) {
1973                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1974                         goto restart_poll;
1975                 }
1976         }
1977         return frames_processed;
1978 }
1979
1980 #ifdef CONFIG_NET_POLL_CONTROLLER
1981 static void ibmvnic_netpoll_controller(struct net_device *dev)
1982 {
1983         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1984         int i;
1985
1986         replenish_pools(netdev_priv(dev));
1987         for (i = 0; i < adapter->req_rx_queues; i++)
1988                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1989                                      adapter->rx_scrq[i]);
1990 }
1991 #endif
1992
1993 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1994 {
1995         adapter->fallback.mtu = adapter->req_mtu;
1996         adapter->fallback.rx_queues = adapter->req_rx_queues;
1997         adapter->fallback.tx_queues = adapter->req_tx_queues;
1998         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1999         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2000
2001         init_completion(&adapter->reset_done);
2002         ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2003         adapter->wait_for_reset = true;
2004         wait_for_completion(&adapter->reset_done);
2005
2006         if (adapter->reset_done_rc) {
2007                 adapter->desired.mtu = adapter->fallback.mtu;
2008                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2009                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2010                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2011                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2012
2013                 init_completion(&adapter->reset_done);
2014                 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2015                 wait_for_completion(&adapter->reset_done);
2016         }
2017         adapter->wait_for_reset = false;
2018
2019         return adapter->reset_done_rc;
2020 }
2021
2022 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2023 {
2024         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2025
2026         adapter->desired.mtu = new_mtu + ETH_HLEN;
2027
2028         return wait_for_reset(adapter);
2029 }
2030
2031 static const struct net_device_ops ibmvnic_netdev_ops = {
2032         .ndo_open               = ibmvnic_open,
2033         .ndo_stop               = ibmvnic_close,
2034         .ndo_start_xmit         = ibmvnic_xmit,
2035         .ndo_set_rx_mode        = ibmvnic_set_multi,
2036         .ndo_set_mac_address    = ibmvnic_set_mac,
2037         .ndo_validate_addr      = eth_validate_addr,
2038         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2039 #ifdef CONFIG_NET_POLL_CONTROLLER
2040         .ndo_poll_controller    = ibmvnic_netpoll_controller,
2041 #endif
2042         .ndo_change_mtu         = ibmvnic_change_mtu,
2043 };
2044
2045 /* ethtool functions */
2046
2047 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2048                                       struct ethtool_link_ksettings *cmd)
2049 {
2050         u32 supported, advertising;
2051
2052         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2053                           SUPPORTED_FIBRE);
2054         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2055                             ADVERTISED_FIBRE);
2056         cmd->base.speed = SPEED_1000;
2057         cmd->base.duplex = DUPLEX_FULL;
2058         cmd->base.port = PORT_FIBRE;
2059         cmd->base.phy_address = 0;
2060         cmd->base.autoneg = AUTONEG_ENABLE;
2061
2062         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2063                                                 supported);
2064         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2065                                                 advertising);
2066
2067         return 0;
2068 }
2069
2070 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2071                                 struct ethtool_drvinfo *info)
2072 {
2073         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2074
2075         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2076         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2077         strlcpy(info->fw_version, adapter->fw_version,
2078                 sizeof(info->fw_version));
2079 }
2080
2081 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2082 {
2083         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2084
2085         return adapter->msg_enable;
2086 }
2087
2088 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2089 {
2090         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2091
2092         adapter->msg_enable = data;
2093 }
2094
2095 static u32 ibmvnic_get_link(struct net_device *netdev)
2096 {
2097         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2098
2099         /* Don't need to send a query because we request a logical link up at
2100          * init and then we wait for link state indications
2101          */
2102         return adapter->logical_link_state;
2103 }
2104
2105 static void ibmvnic_get_ringparam(struct net_device *netdev,
2106                                   struct ethtool_ringparam *ring)
2107 {
2108         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2109
2110         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2111         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2112         ring->rx_mini_max_pending = 0;
2113         ring->rx_jumbo_max_pending = 0;
2114         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2115         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2116         ring->rx_mini_pending = 0;
2117         ring->rx_jumbo_pending = 0;
2118 }
2119
2120 static int ibmvnic_set_ringparam(struct net_device *netdev,
2121                                  struct ethtool_ringparam *ring)
2122 {
2123         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2124
2125         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2126             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2127                 netdev_err(netdev, "Invalid request.\n");
2128                 netdev_err(netdev, "Max tx buffers = %llu\n",
2129                            adapter->max_rx_add_entries_per_subcrq);
2130                 netdev_err(netdev, "Max rx buffers = %llu\n",
2131                            adapter->max_tx_entries_per_subcrq);
2132                 return -EINVAL;
2133         }
2134
2135         adapter->desired.rx_entries = ring->rx_pending;
2136         adapter->desired.tx_entries = ring->tx_pending;
2137
2138         return wait_for_reset(adapter);
2139 }
2140
2141 static void ibmvnic_get_channels(struct net_device *netdev,
2142                                  struct ethtool_channels *channels)
2143 {
2144         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2145
2146         channels->max_rx = adapter->max_rx_queues;
2147         channels->max_tx = adapter->max_tx_queues;
2148         channels->max_other = 0;
2149         channels->max_combined = 0;
2150         channels->rx_count = adapter->req_rx_queues;
2151         channels->tx_count = adapter->req_tx_queues;
2152         channels->other_count = 0;
2153         channels->combined_count = 0;
2154 }
2155
2156 static int ibmvnic_set_channels(struct net_device *netdev,
2157                                 struct ethtool_channels *channels)
2158 {
2159         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2160
2161         adapter->desired.rx_queues = channels->rx_count;
2162         adapter->desired.tx_queues = channels->tx_count;
2163
2164         return wait_for_reset(adapter);
2165 }
2166
2167 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2168 {
2169         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2170         int i;
2171
2172         if (stringset != ETH_SS_STATS)
2173                 return;
2174
2175         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2176                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2177
2178         for (i = 0; i < adapter->req_tx_queues; i++) {
2179                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2180                 data += ETH_GSTRING_LEN;
2181
2182                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2183                 data += ETH_GSTRING_LEN;
2184
2185                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2186                 data += ETH_GSTRING_LEN;
2187         }
2188
2189         for (i = 0; i < adapter->req_rx_queues; i++) {
2190                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2191                 data += ETH_GSTRING_LEN;
2192
2193                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2194                 data += ETH_GSTRING_LEN;
2195
2196                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2197                 data += ETH_GSTRING_LEN;
2198         }
2199 }
2200
2201 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2202 {
2203         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2204
2205         switch (sset) {
2206         case ETH_SS_STATS:
2207                 return ARRAY_SIZE(ibmvnic_stats) +
2208                        adapter->req_tx_queues * NUM_TX_STATS +
2209                        adapter->req_rx_queues * NUM_RX_STATS;
2210         default:
2211                 return -EOPNOTSUPP;
2212         }
2213 }
2214
2215 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2216                                       struct ethtool_stats *stats, u64 *data)
2217 {
2218         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2219         union ibmvnic_crq crq;
2220         int i, j;
2221
2222         memset(&crq, 0, sizeof(crq));
2223         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2224         crq.request_statistics.cmd = REQUEST_STATISTICS;
2225         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2226         crq.request_statistics.len =
2227             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2228
2229         /* Wait for data to be written */
2230         init_completion(&adapter->stats_done);
2231         ibmvnic_send_crq(adapter, &crq);
2232         wait_for_completion(&adapter->stats_done);
2233
2234         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2235                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2236                                                 ibmvnic_stats[i].offset));
2237
2238         for (j = 0; j < adapter->req_tx_queues; j++) {
2239                 data[i] = adapter->tx_stats_buffers[j].packets;
2240                 i++;
2241                 data[i] = adapter->tx_stats_buffers[j].bytes;
2242                 i++;
2243                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2244                 i++;
2245         }
2246
2247         for (j = 0; j < adapter->req_rx_queues; j++) {
2248                 data[i] = adapter->rx_stats_buffers[j].packets;
2249                 i++;
2250                 data[i] = adapter->rx_stats_buffers[j].bytes;
2251                 i++;
2252                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2253                 i++;
2254         }
2255 }
2256
2257 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2258         .get_drvinfo            = ibmvnic_get_drvinfo,
2259         .get_msglevel           = ibmvnic_get_msglevel,
2260         .set_msglevel           = ibmvnic_set_msglevel,
2261         .get_link               = ibmvnic_get_link,
2262         .get_ringparam          = ibmvnic_get_ringparam,
2263         .set_ringparam          = ibmvnic_set_ringparam,
2264         .get_channels           = ibmvnic_get_channels,
2265         .set_channels           = ibmvnic_set_channels,
2266         .get_strings            = ibmvnic_get_strings,
2267         .get_sset_count         = ibmvnic_get_sset_count,
2268         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2269         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2270 };
2271
2272 /* Routines for managing CRQs/sCRQs  */
2273
2274 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2275                                    struct ibmvnic_sub_crq_queue *scrq)
2276 {
2277         int rc;
2278
2279         if (scrq->irq) {
2280                 free_irq(scrq->irq, scrq);
2281                 irq_dispose_mapping(scrq->irq);
2282                 scrq->irq = 0;
2283         }
2284
2285         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2286         scrq->cur = 0;
2287
2288         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2289                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2290         return rc;
2291 }
2292
2293 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2294 {
2295         int i, rc;
2296
2297         for (i = 0; i < adapter->req_tx_queues; i++) {
2298                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2299                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2300                 if (rc)
2301                         return rc;
2302         }
2303
2304         for (i = 0; i < adapter->req_rx_queues; i++) {
2305                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2306                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2307                 if (rc)
2308                         return rc;
2309         }
2310
2311         return rc;
2312 }
2313
2314 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2315                                   struct ibmvnic_sub_crq_queue *scrq,
2316                                   bool do_h_free)
2317 {
2318         struct device *dev = &adapter->vdev->dev;
2319         long rc;
2320
2321         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2322
2323         if (do_h_free) {
2324                 /* Close the sub-crqs */
2325                 do {
2326                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2327                                                 adapter->vdev->unit_address,
2328                                                 scrq->crq_num);
2329                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2330
2331                 if (rc) {
2332                         netdev_err(adapter->netdev,
2333                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2334                                    scrq->crq_num, rc);
2335                 }
2336         }
2337
2338         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2339                          DMA_BIDIRECTIONAL);
2340         free_pages((unsigned long)scrq->msgs, 2);
2341         kfree(scrq);
2342 }
2343
2344 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2345                                                         *adapter)
2346 {
2347         struct device *dev = &adapter->vdev->dev;
2348         struct ibmvnic_sub_crq_queue *scrq;
2349         int rc;
2350
2351         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2352         if (!scrq)
2353                 return NULL;
2354
2355         scrq->msgs =
2356                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2357         if (!scrq->msgs) {
2358                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2359                 goto zero_page_failed;
2360         }
2361
2362         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2363                                          DMA_BIDIRECTIONAL);
2364         if (dma_mapping_error(dev, scrq->msg_token)) {
2365                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2366                 goto map_failed;
2367         }
2368
2369         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2370                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2371
2372         if (rc == H_RESOURCE)
2373                 rc = ibmvnic_reset_crq(adapter);
2374
2375         if (rc == H_CLOSED) {
2376                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2377         } else if (rc) {
2378                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2379                 goto reg_failed;
2380         }
2381
2382         scrq->adapter = adapter;
2383         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2384         spin_lock_init(&scrq->lock);
2385
2386         netdev_dbg(adapter->netdev,
2387                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2388                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2389
2390         return scrq;
2391
2392 reg_failed:
2393         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2394                          DMA_BIDIRECTIONAL);
2395 map_failed:
2396         free_pages((unsigned long)scrq->msgs, 2);
2397 zero_page_failed:
2398         kfree(scrq);
2399
2400         return NULL;
2401 }
2402
2403 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2404 {
2405         int i;
2406
2407         if (adapter->tx_scrq) {
2408                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2409                         if (!adapter->tx_scrq[i])
2410                                 continue;
2411
2412                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2413                                    i);
2414                         if (adapter->tx_scrq[i]->irq) {
2415                                 free_irq(adapter->tx_scrq[i]->irq,
2416                                          adapter->tx_scrq[i]);
2417                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2418                                 adapter->tx_scrq[i]->irq = 0;
2419                         }
2420
2421                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2422                                               do_h_free);
2423                 }
2424
2425                 kfree(adapter->tx_scrq);
2426                 adapter->tx_scrq = NULL;
2427                 adapter->num_active_tx_scrqs = 0;
2428         }
2429
2430         if (adapter->rx_scrq) {
2431                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2432                         if (!adapter->rx_scrq[i])
2433                                 continue;
2434
2435                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2436                                    i);
2437                         if (adapter->rx_scrq[i]->irq) {
2438                                 free_irq(adapter->rx_scrq[i]->irq,
2439                                          adapter->rx_scrq[i]);
2440                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2441                                 adapter->rx_scrq[i]->irq = 0;
2442                         }
2443
2444                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2445                                               do_h_free);
2446                 }
2447
2448                 kfree(adapter->rx_scrq);
2449                 adapter->rx_scrq = NULL;
2450                 adapter->num_active_rx_scrqs = 0;
2451         }
2452 }
2453
2454 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2455                             struct ibmvnic_sub_crq_queue *scrq)
2456 {
2457         struct device *dev = &adapter->vdev->dev;
2458         unsigned long rc;
2459
2460         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2461                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2462         if (rc)
2463                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2464                         scrq->hw_irq, rc);
2465         return rc;
2466 }
2467
2468 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2469                            struct ibmvnic_sub_crq_queue *scrq)
2470 {
2471         struct device *dev = &adapter->vdev->dev;
2472         unsigned long rc;
2473
2474         if (scrq->hw_irq > 0x100000000ULL) {
2475                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2476                 return 1;
2477         }
2478
2479         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2480                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2481         if (rc)
2482                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2483                         scrq->hw_irq, rc);
2484         return rc;
2485 }
2486
2487 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2488                                struct ibmvnic_sub_crq_queue *scrq)
2489 {
2490         struct device *dev = &adapter->vdev->dev;
2491         struct ibmvnic_tx_buff *txbuff;
2492         union sub_crq *next;
2493         int index;
2494         int i, j;
2495         u8 first;
2496
2497 restart_loop:
2498         while (pending_scrq(adapter, scrq)) {
2499                 unsigned int pool = scrq->pool_index;
2500                 int num_entries = 0;
2501
2502                 next = ibmvnic_next_scrq(adapter, scrq);
2503                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2504                         if (next->tx_comp.rcs[i]) {
2505                                 dev_err(dev, "tx error %x\n",
2506                                         next->tx_comp.rcs[i]);
2507                                 continue;
2508                         }
2509                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2510                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2511
2512                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2513                                 if (!txbuff->data_dma[j])
2514                                         continue;
2515
2516                                 txbuff->data_dma[j] = 0;
2517                         }
2518                         /* if sub_crq was sent indirectly */
2519                         first = txbuff->indir_arr[0].generic.first;
2520                         if (first == IBMVNIC_CRQ_CMD) {
2521                                 dma_unmap_single(dev, txbuff->indir_dma,
2522                                                  sizeof(txbuff->indir_arr),
2523                                                  DMA_TO_DEVICE);
2524                         }
2525
2526                         if (txbuff->last_frag) {
2527                                 dev_kfree_skb_any(txbuff->skb);
2528                                 txbuff->skb = NULL;
2529                         }
2530
2531                         num_entries += txbuff->num_entries;
2532
2533                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2534                                                      producer_index] = index;
2535                         adapter->tx_pool[pool].producer_index =
2536                             (adapter->tx_pool[pool].producer_index + 1) %
2537                             adapter->req_tx_entries_per_subcrq;
2538                 }
2539                 /* remove tx_comp scrq*/
2540                 next->tx_comp.first = 0;
2541
2542                 if (atomic_sub_return(num_entries, &scrq->used) <=
2543                     (adapter->req_tx_entries_per_subcrq / 2) &&
2544                     __netif_subqueue_stopped(adapter->netdev,
2545                                              scrq->pool_index)) {
2546                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2547                         netdev_dbg(adapter->netdev, "Started queue %d\n",
2548                                    scrq->pool_index);
2549                 }
2550         }
2551
2552         enable_scrq_irq(adapter, scrq);
2553
2554         if (pending_scrq(adapter, scrq)) {
2555                 disable_scrq_irq(adapter, scrq);
2556                 goto restart_loop;
2557         }
2558
2559         return 0;
2560 }
2561
2562 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2563 {
2564         struct ibmvnic_sub_crq_queue *scrq = instance;
2565         struct ibmvnic_adapter *adapter = scrq->adapter;
2566
2567         disable_scrq_irq(adapter, scrq);
2568         ibmvnic_complete_tx(adapter, scrq);
2569
2570         return IRQ_HANDLED;
2571 }
2572
2573 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2574 {
2575         struct ibmvnic_sub_crq_queue *scrq = instance;
2576         struct ibmvnic_adapter *adapter = scrq->adapter;
2577
2578         /* When booting a kdump kernel we can hit pending interrupts
2579          * prior to completing driver initialization.
2580          */
2581         if (unlikely(adapter->state != VNIC_OPEN))
2582                 return IRQ_NONE;
2583
2584         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2585
2586         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2587                 disable_scrq_irq(adapter, scrq);
2588                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2589         }
2590
2591         return IRQ_HANDLED;
2592 }
2593
2594 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2595 {
2596         struct device *dev = &adapter->vdev->dev;
2597         struct ibmvnic_sub_crq_queue *scrq;
2598         int i = 0, j = 0;
2599         int rc = 0;
2600
2601         for (i = 0; i < adapter->req_tx_queues; i++) {
2602                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2603                            i);
2604                 scrq = adapter->tx_scrq[i];
2605                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2606
2607                 if (!scrq->irq) {
2608                         rc = -EINVAL;
2609                         dev_err(dev, "Error mapping irq\n");
2610                         goto req_tx_irq_failed;
2611                 }
2612
2613                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2614                                  0, "ibmvnic_tx", scrq);
2615
2616                 if (rc) {
2617                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2618                                 scrq->irq, rc);
2619                         irq_dispose_mapping(scrq->irq);
2620                         goto req_tx_irq_failed;
2621                 }
2622         }
2623
2624         for (i = 0; i < adapter->req_rx_queues; i++) {
2625                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2626                            i);
2627                 scrq = adapter->rx_scrq[i];
2628                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2629                 if (!scrq->irq) {
2630                         rc = -EINVAL;
2631                         dev_err(dev, "Error mapping irq\n");
2632                         goto req_rx_irq_failed;
2633                 }
2634                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2635                                  0, "ibmvnic_rx", scrq);
2636                 if (rc) {
2637                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2638                                 scrq->irq, rc);
2639                         irq_dispose_mapping(scrq->irq);
2640                         goto req_rx_irq_failed;
2641                 }
2642         }
2643         return rc;
2644
2645 req_rx_irq_failed:
2646         for (j = 0; j < i; j++) {
2647                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2648                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2649         }
2650         i = adapter->req_tx_queues;
2651 req_tx_irq_failed:
2652         for (j = 0; j < i; j++) {
2653                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2654                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2655         }
2656         release_sub_crqs(adapter, 1);
2657         return rc;
2658 }
2659
2660 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2661 {
2662         struct device *dev = &adapter->vdev->dev;
2663         struct ibmvnic_sub_crq_queue **allqueues;
2664         int registered_queues = 0;
2665         int total_queues;
2666         int more = 0;
2667         int i;
2668
2669         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2670
2671         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2672         if (!allqueues)
2673                 return -1;
2674
2675         for (i = 0; i < total_queues; i++) {
2676                 allqueues[i] = init_sub_crq_queue(adapter);
2677                 if (!allqueues[i]) {
2678                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2679                         break;
2680                 }
2681                 registered_queues++;
2682         }
2683
2684         /* Make sure we were able to register the minimum number of queues */
2685         if (registered_queues <
2686             adapter->min_tx_queues + adapter->min_rx_queues) {
2687                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2688                 goto tx_failed;
2689         }
2690
2691         /* Distribute the failed allocated queues*/
2692         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2693                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2694                 switch (i % 3) {
2695                 case 0:
2696                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2697                                 adapter->req_rx_queues--;
2698                         else
2699                                 more++;
2700                         break;
2701                 case 1:
2702                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2703                                 adapter->req_tx_queues--;
2704                         else
2705                                 more++;
2706                         break;
2707                 }
2708         }
2709
2710         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2711                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2712         if (!adapter->tx_scrq)
2713                 goto tx_failed;
2714
2715         for (i = 0; i < adapter->req_tx_queues; i++) {
2716                 adapter->tx_scrq[i] = allqueues[i];
2717                 adapter->tx_scrq[i]->pool_index = i;
2718                 adapter->num_active_tx_scrqs++;
2719         }
2720
2721         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2722                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2723         if (!adapter->rx_scrq)
2724                 goto rx_failed;
2725
2726         for (i = 0; i < adapter->req_rx_queues; i++) {
2727                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2728                 adapter->rx_scrq[i]->scrq_num = i;
2729                 adapter->num_active_rx_scrqs++;
2730         }
2731
2732         kfree(allqueues);
2733         return 0;
2734
2735 rx_failed:
2736         kfree(adapter->tx_scrq);
2737         adapter->tx_scrq = NULL;
2738 tx_failed:
2739         for (i = 0; i < registered_queues; i++)
2740                 release_sub_crq_queue(adapter, allqueues[i], 1);
2741         kfree(allqueues);
2742         return -1;
2743 }
2744
2745 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2746 {
2747         struct device *dev = &adapter->vdev->dev;
2748         union ibmvnic_crq crq;
2749         int max_entries;
2750
2751         if (!retry) {
2752                 /* Sub-CRQ entries are 32 byte long */
2753                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2754
2755                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2756                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2757                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2758                         return;
2759                 }
2760
2761                 if (adapter->desired.mtu)
2762                         adapter->req_mtu = adapter->desired.mtu;
2763                 else
2764                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2765
2766                 if (!adapter->desired.tx_entries)
2767                         adapter->desired.tx_entries =
2768                                         adapter->max_tx_entries_per_subcrq;
2769                 if (!adapter->desired.rx_entries)
2770                         adapter->desired.rx_entries =
2771                                         adapter->max_rx_add_entries_per_subcrq;
2772
2773                 max_entries = IBMVNIC_MAX_LTB_SIZE /
2774                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2775
2776                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2777                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2778                         adapter->desired.tx_entries = max_entries;
2779                 }
2780
2781                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2782                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2783                         adapter->desired.rx_entries = max_entries;
2784                 }
2785
2786                 if (adapter->desired.tx_entries)
2787                         adapter->req_tx_entries_per_subcrq =
2788                                         adapter->desired.tx_entries;
2789                 else
2790                         adapter->req_tx_entries_per_subcrq =
2791                                         adapter->max_tx_entries_per_subcrq;
2792
2793                 if (adapter->desired.rx_entries)
2794                         adapter->req_rx_add_entries_per_subcrq =
2795                                         adapter->desired.rx_entries;
2796                 else
2797                         adapter->req_rx_add_entries_per_subcrq =
2798                                         adapter->max_rx_add_entries_per_subcrq;
2799
2800                 if (adapter->desired.tx_queues)
2801                         adapter->req_tx_queues =
2802                                         adapter->desired.tx_queues;
2803                 else
2804                         adapter->req_tx_queues =
2805                                         adapter->opt_tx_comp_sub_queues;
2806
2807                 if (adapter->desired.rx_queues)
2808                         adapter->req_rx_queues =
2809                                         adapter->desired.rx_queues;
2810                 else
2811                         adapter->req_rx_queues =
2812                                         adapter->opt_rx_comp_queues;
2813
2814                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2815         }
2816
2817         memset(&crq, 0, sizeof(crq));
2818         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2819         crq.request_capability.cmd = REQUEST_CAPABILITY;
2820
2821         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2822         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2823         atomic_inc(&adapter->running_cap_crqs);
2824         ibmvnic_send_crq(adapter, &crq);
2825
2826         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2827         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2828         atomic_inc(&adapter->running_cap_crqs);
2829         ibmvnic_send_crq(adapter, &crq);
2830
2831         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2832         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2833         atomic_inc(&adapter->running_cap_crqs);
2834         ibmvnic_send_crq(adapter, &crq);
2835
2836         crq.request_capability.capability =
2837             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2838         crq.request_capability.number =
2839             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2840         atomic_inc(&adapter->running_cap_crqs);
2841         ibmvnic_send_crq(adapter, &crq);
2842
2843         crq.request_capability.capability =
2844             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2845         crq.request_capability.number =
2846             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2847         atomic_inc(&adapter->running_cap_crqs);
2848         ibmvnic_send_crq(adapter, &crq);
2849
2850         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2851         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2852         atomic_inc(&adapter->running_cap_crqs);
2853         ibmvnic_send_crq(adapter, &crq);
2854
2855         if (adapter->netdev->flags & IFF_PROMISC) {
2856                 if (adapter->promisc_supported) {
2857                         crq.request_capability.capability =
2858                             cpu_to_be16(PROMISC_REQUESTED);
2859                         crq.request_capability.number = cpu_to_be64(1);
2860                         atomic_inc(&adapter->running_cap_crqs);
2861                         ibmvnic_send_crq(adapter, &crq);
2862                 }
2863         } else {
2864                 crq.request_capability.capability =
2865                     cpu_to_be16(PROMISC_REQUESTED);
2866                 crq.request_capability.number = cpu_to_be64(0);
2867                 atomic_inc(&adapter->running_cap_crqs);
2868                 ibmvnic_send_crq(adapter, &crq);
2869         }
2870 }
2871
2872 static int pending_scrq(struct ibmvnic_adapter *adapter,
2873                         struct ibmvnic_sub_crq_queue *scrq)
2874 {
2875         union sub_crq *entry = &scrq->msgs[scrq->cur];
2876
2877         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2878                 return 1;
2879         else
2880                 return 0;
2881 }
2882
2883 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2884                                         struct ibmvnic_sub_crq_queue *scrq)
2885 {
2886         union sub_crq *entry;
2887         unsigned long flags;
2888
2889         spin_lock_irqsave(&scrq->lock, flags);
2890         entry = &scrq->msgs[scrq->cur];
2891         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2892                 if (++scrq->cur == scrq->size)
2893                         scrq->cur = 0;
2894         } else {
2895                 entry = NULL;
2896         }
2897         spin_unlock_irqrestore(&scrq->lock, flags);
2898
2899         return entry;
2900 }
2901
2902 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2903 {
2904         struct ibmvnic_crq_queue *queue = &adapter->crq;
2905         union ibmvnic_crq *crq;
2906
2907         crq = &queue->msgs[queue->cur];
2908         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2909                 if (++queue->cur == queue->size)
2910                         queue->cur = 0;
2911         } else {
2912                 crq = NULL;
2913         }
2914
2915         return crq;
2916 }
2917
2918 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2919                        union sub_crq *sub_crq)
2920 {
2921         unsigned int ua = adapter->vdev->unit_address;
2922         struct device *dev = &adapter->vdev->dev;
2923         u64 *u64_crq = (u64 *)sub_crq;
2924         int rc;
2925
2926         netdev_dbg(adapter->netdev,
2927                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2928                    (unsigned long int)cpu_to_be64(remote_handle),
2929                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2930                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2931                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2932                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2933
2934         /* Make sure the hypervisor sees the complete request */
2935         mb();
2936
2937         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2938                                 cpu_to_be64(remote_handle),
2939                                 cpu_to_be64(u64_crq[0]),
2940                                 cpu_to_be64(u64_crq[1]),
2941                                 cpu_to_be64(u64_crq[2]),
2942                                 cpu_to_be64(u64_crq[3]));
2943
2944         if (rc) {
2945                 if (rc == H_CLOSED)
2946                         dev_warn(dev, "CRQ Queue closed\n");
2947                 dev_err(dev, "Send error (rc=%d)\n", rc);
2948         }
2949
2950         return rc;
2951 }
2952
2953 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2954                                 u64 remote_handle, u64 ioba, u64 num_entries)
2955 {
2956         unsigned int ua = adapter->vdev->unit_address;
2957         struct device *dev = &adapter->vdev->dev;
2958         int rc;
2959
2960         /* Make sure the hypervisor sees the complete request */
2961         mb();
2962         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2963                                 cpu_to_be64(remote_handle),
2964                                 ioba, num_entries);
2965
2966         if (rc) {
2967                 if (rc == H_CLOSED)
2968                         dev_warn(dev, "CRQ Queue closed\n");
2969                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2970         }
2971
2972         return rc;
2973 }
2974
2975 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2976                             union ibmvnic_crq *crq)
2977 {
2978         unsigned int ua = adapter->vdev->unit_address;
2979         struct device *dev = &adapter->vdev->dev;
2980         u64 *u64_crq = (u64 *)crq;
2981         int rc;
2982
2983         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2984                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2985                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2986
2987         /* Make sure the hypervisor sees the complete request */
2988         mb();
2989
2990         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2991                                 cpu_to_be64(u64_crq[0]),
2992                                 cpu_to_be64(u64_crq[1]));
2993
2994         if (rc) {
2995                 if (rc == H_CLOSED) {
2996                         dev_warn(dev, "CRQ Queue closed\n");
2997                         if (adapter->resetting)
2998                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2999                 }
3000
3001                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3002         }
3003
3004         return rc;
3005 }
3006
3007 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3008 {
3009         union ibmvnic_crq crq;
3010
3011         memset(&crq, 0, sizeof(crq));
3012         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3013         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3014         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3015
3016         return ibmvnic_send_crq(adapter, &crq);
3017 }
3018
3019 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3020 {
3021         union ibmvnic_crq crq;
3022
3023         memset(&crq, 0, sizeof(crq));
3024         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3025         crq.version_exchange.cmd = VERSION_EXCHANGE;
3026         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3027
3028         return ibmvnic_send_crq(adapter, &crq);
3029 }
3030
3031 struct vnic_login_client_data {
3032         u8      type;
3033         __be16  len;
3034         char    name;
3035 } __packed;
3036
3037 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3038 {
3039         int len;
3040
3041         /* Calculate the amount of buffer space needed for the
3042          * vnic client data in the login buffer. There are four entries,
3043          * OS name, LPAR name, device name, and a null last entry.
3044          */
3045         len = 4 * sizeof(struct vnic_login_client_data);
3046         len += 6; /* "Linux" plus NULL */
3047         len += strlen(utsname()->nodename) + 1;
3048         len += strlen(adapter->netdev->name) + 1;
3049
3050         return len;
3051 }
3052
3053 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3054                                  struct vnic_login_client_data *vlcd)
3055 {
3056         const char *os_name = "Linux";
3057         int len;
3058
3059         /* Type 1 - LPAR OS */
3060         vlcd->type = 1;
3061         len = strlen(os_name) + 1;
3062         vlcd->len = cpu_to_be16(len);
3063         strncpy(&vlcd->name, os_name, len);
3064         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3065
3066         /* Type 2 - LPAR name */
3067         vlcd->type = 2;
3068         len = strlen(utsname()->nodename) + 1;
3069         vlcd->len = cpu_to_be16(len);
3070         strncpy(&vlcd->name, utsname()->nodename, len);
3071         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3072
3073         /* Type 3 - device name */
3074         vlcd->type = 3;
3075         len = strlen(adapter->netdev->name) + 1;
3076         vlcd->len = cpu_to_be16(len);
3077         strncpy(&vlcd->name, adapter->netdev->name, len);
3078 }
3079
3080 static int send_login(struct ibmvnic_adapter *adapter)
3081 {
3082         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3083         struct ibmvnic_login_buffer *login_buffer;
3084         struct device *dev = &adapter->vdev->dev;
3085         dma_addr_t rsp_buffer_token;
3086         dma_addr_t buffer_token;
3087         size_t rsp_buffer_size;
3088         union ibmvnic_crq crq;
3089         size_t buffer_size;
3090         __be64 *tx_list_p;
3091         __be64 *rx_list_p;
3092         int client_data_len;
3093         struct vnic_login_client_data *vlcd;
3094         int i;
3095
3096         if (!adapter->tx_scrq || !adapter->rx_scrq) {
3097                 netdev_err(adapter->netdev,
3098                            "RX or TX queues are not allocated, device login failed\n");
3099                 return -1;
3100         }
3101
3102         release_login_rsp_buffer(adapter);
3103         client_data_len = vnic_client_data_len(adapter);
3104
3105         buffer_size =
3106             sizeof(struct ibmvnic_login_buffer) +
3107             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3108             client_data_len;
3109
3110         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3111         if (!login_buffer)
3112                 goto buf_alloc_failed;
3113
3114         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3115                                       DMA_TO_DEVICE);
3116         if (dma_mapping_error(dev, buffer_token)) {
3117                 dev_err(dev, "Couldn't map login buffer\n");
3118                 goto buf_map_failed;
3119         }
3120
3121         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3122                           sizeof(u64) * adapter->req_tx_queues +
3123                           sizeof(u64) * adapter->req_rx_queues +
3124                           sizeof(u64) * adapter->req_rx_queues +
3125                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3126
3127         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3128         if (!login_rsp_buffer)
3129                 goto buf_rsp_alloc_failed;
3130
3131         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3132                                           rsp_buffer_size, DMA_FROM_DEVICE);
3133         if (dma_mapping_error(dev, rsp_buffer_token)) {
3134                 dev_err(dev, "Couldn't map login rsp buffer\n");
3135                 goto buf_rsp_map_failed;
3136         }
3137
3138         adapter->login_buf = login_buffer;
3139         adapter->login_buf_token = buffer_token;
3140         adapter->login_buf_sz = buffer_size;
3141         adapter->login_rsp_buf = login_rsp_buffer;
3142         adapter->login_rsp_buf_token = rsp_buffer_token;
3143         adapter->login_rsp_buf_sz = rsp_buffer_size;
3144
3145         login_buffer->len = cpu_to_be32(buffer_size);
3146         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3147         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3148         login_buffer->off_txcomp_subcrqs =
3149             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3150         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3151         login_buffer->off_rxcomp_subcrqs =
3152             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3153                         sizeof(u64) * adapter->req_tx_queues);
3154         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3155         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3156
3157         tx_list_p = (__be64 *)((char *)login_buffer +
3158                                       sizeof(struct ibmvnic_login_buffer));
3159         rx_list_p = (__be64 *)((char *)login_buffer +
3160                                       sizeof(struct ibmvnic_login_buffer) +
3161                                       sizeof(u64) * adapter->req_tx_queues);
3162
3163         for (i = 0; i < adapter->req_tx_queues; i++) {
3164                 if (adapter->tx_scrq[i]) {
3165                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3166                                                    crq_num);
3167                 }
3168         }
3169
3170         for (i = 0; i < adapter->req_rx_queues; i++) {
3171                 if (adapter->rx_scrq[i]) {
3172                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3173                                                    crq_num);
3174                 }
3175         }
3176
3177         /* Insert vNIC login client data */
3178         vlcd = (struct vnic_login_client_data *)
3179                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3180         login_buffer->client_data_offset =
3181                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3182         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3183
3184         vnic_add_client_data(adapter, vlcd);
3185
3186         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3187         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3188                 netdev_dbg(adapter->netdev, "%016lx\n",
3189                            ((unsigned long int *)(adapter->login_buf))[i]);
3190         }
3191
3192         memset(&crq, 0, sizeof(crq));
3193         crq.login.first = IBMVNIC_CRQ_CMD;
3194         crq.login.cmd = LOGIN;
3195         crq.login.ioba = cpu_to_be32(buffer_token);
3196         crq.login.len = cpu_to_be32(buffer_size);
3197         ibmvnic_send_crq(adapter, &crq);
3198
3199         return 0;
3200
3201 buf_rsp_map_failed:
3202         kfree(login_rsp_buffer);
3203 buf_rsp_alloc_failed:
3204         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3205 buf_map_failed:
3206         kfree(login_buffer);
3207 buf_alloc_failed:
3208         return -1;
3209 }
3210
3211 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3212                              u32 len, u8 map_id)
3213 {
3214         union ibmvnic_crq crq;
3215
3216         memset(&crq, 0, sizeof(crq));
3217         crq.request_map.first = IBMVNIC_CRQ_CMD;
3218         crq.request_map.cmd = REQUEST_MAP;
3219         crq.request_map.map_id = map_id;
3220         crq.request_map.ioba = cpu_to_be32(addr);
3221         crq.request_map.len = cpu_to_be32(len);
3222         ibmvnic_send_crq(adapter, &crq);
3223 }
3224
3225 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3226 {
3227         union ibmvnic_crq crq;
3228
3229         memset(&crq, 0, sizeof(crq));
3230         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3231         crq.request_unmap.cmd = REQUEST_UNMAP;
3232         crq.request_unmap.map_id = map_id;
3233         ibmvnic_send_crq(adapter, &crq);
3234 }
3235
3236 static void send_map_query(struct ibmvnic_adapter *adapter)
3237 {
3238         union ibmvnic_crq crq;
3239
3240         memset(&crq, 0, sizeof(crq));
3241         crq.query_map.first = IBMVNIC_CRQ_CMD;
3242         crq.query_map.cmd = QUERY_MAP;
3243         ibmvnic_send_crq(adapter, &crq);
3244 }
3245
3246 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3247 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3248 {
3249         union ibmvnic_crq crq;
3250
3251         atomic_set(&adapter->running_cap_crqs, 0);
3252         memset(&crq, 0, sizeof(crq));
3253         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3254         crq.query_capability.cmd = QUERY_CAPABILITY;
3255
3256         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3257         atomic_inc(&adapter->running_cap_crqs);
3258         ibmvnic_send_crq(adapter, &crq);
3259
3260         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3261         atomic_inc(&adapter->running_cap_crqs);
3262         ibmvnic_send_crq(adapter, &crq);
3263
3264         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3265         atomic_inc(&adapter->running_cap_crqs);
3266         ibmvnic_send_crq(adapter, &crq);
3267
3268         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3269         atomic_inc(&adapter->running_cap_crqs);
3270         ibmvnic_send_crq(adapter, &crq);
3271
3272         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3273         atomic_inc(&adapter->running_cap_crqs);
3274         ibmvnic_send_crq(adapter, &crq);
3275
3276         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3277         atomic_inc(&adapter->running_cap_crqs);
3278         ibmvnic_send_crq(adapter, &crq);
3279
3280         crq.query_capability.capability =
3281             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3282         atomic_inc(&adapter->running_cap_crqs);
3283         ibmvnic_send_crq(adapter, &crq);
3284
3285         crq.query_capability.capability =
3286             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3287         atomic_inc(&adapter->running_cap_crqs);
3288         ibmvnic_send_crq(adapter, &crq);
3289
3290         crq.query_capability.capability =
3291             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3292         atomic_inc(&adapter->running_cap_crqs);
3293         ibmvnic_send_crq(adapter, &crq);
3294
3295         crq.query_capability.capability =
3296             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3297         atomic_inc(&adapter->running_cap_crqs);
3298         ibmvnic_send_crq(adapter, &crq);
3299
3300         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3301         atomic_inc(&adapter->running_cap_crqs);
3302         ibmvnic_send_crq(adapter, &crq);
3303
3304         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3305         atomic_inc(&adapter->running_cap_crqs);
3306         ibmvnic_send_crq(adapter, &crq);
3307
3308         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3309         atomic_inc(&adapter->running_cap_crqs);
3310         ibmvnic_send_crq(adapter, &crq);
3311
3312         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3313         atomic_inc(&adapter->running_cap_crqs);
3314         ibmvnic_send_crq(adapter, &crq);
3315
3316         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3317         atomic_inc(&adapter->running_cap_crqs);
3318         ibmvnic_send_crq(adapter, &crq);
3319
3320         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3321         atomic_inc(&adapter->running_cap_crqs);
3322         ibmvnic_send_crq(adapter, &crq);
3323
3324         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3325         atomic_inc(&adapter->running_cap_crqs);
3326         ibmvnic_send_crq(adapter, &crq);
3327
3328         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3329         atomic_inc(&adapter->running_cap_crqs);
3330         ibmvnic_send_crq(adapter, &crq);
3331
3332         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3333         atomic_inc(&adapter->running_cap_crqs);
3334         ibmvnic_send_crq(adapter, &crq);
3335
3336         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3337         atomic_inc(&adapter->running_cap_crqs);
3338         ibmvnic_send_crq(adapter, &crq);
3339
3340         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3341         atomic_inc(&adapter->running_cap_crqs);
3342         ibmvnic_send_crq(adapter, &crq);
3343
3344         crq.query_capability.capability =
3345                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3346         atomic_inc(&adapter->running_cap_crqs);
3347         ibmvnic_send_crq(adapter, &crq);
3348
3349         crq.query_capability.capability =
3350                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3351         atomic_inc(&adapter->running_cap_crqs);
3352         ibmvnic_send_crq(adapter, &crq);
3353
3354         crq.query_capability.capability =
3355                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3356         atomic_inc(&adapter->running_cap_crqs);
3357         ibmvnic_send_crq(adapter, &crq);
3358
3359         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3360         atomic_inc(&adapter->running_cap_crqs);
3361         ibmvnic_send_crq(adapter, &crq);
3362 }
3363
3364 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3365                                 struct ibmvnic_adapter *adapter)
3366 {
3367         struct device *dev = &adapter->vdev->dev;
3368
3369         if (crq->get_vpd_size_rsp.rc.code) {
3370                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3371                         crq->get_vpd_size_rsp.rc.code);
3372                 complete(&adapter->fw_done);
3373                 return;
3374         }
3375
3376         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3377         complete(&adapter->fw_done);
3378 }
3379
3380 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3381                            struct ibmvnic_adapter *adapter)
3382 {
3383         struct device *dev = &adapter->vdev->dev;
3384         unsigned char *substr = NULL;
3385         u8 fw_level_len = 0;
3386
3387         memset(adapter->fw_version, 0, 32);
3388
3389         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3390                          DMA_FROM_DEVICE);
3391
3392         if (crq->get_vpd_rsp.rc.code) {
3393                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3394                         crq->get_vpd_rsp.rc.code);
3395                 goto complete;
3396         }
3397
3398         /* get the position of the firmware version info
3399          * located after the ASCII 'RM' substring in the buffer
3400          */
3401         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3402         if (!substr) {
3403                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3404                 goto complete;
3405         }
3406
3407         /* get length of firmware level ASCII substring */
3408         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3409                 fw_level_len = *(substr + 2);
3410         } else {
3411                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3412                 goto complete;
3413         }
3414
3415         /* copy firmware version string from vpd into adapter */
3416         if ((substr + 3 + fw_level_len) <
3417             (adapter->vpd->buff + adapter->vpd->len)) {
3418                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3419         } else {
3420                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3421         }
3422
3423 complete:
3424         if (adapter->fw_version[0] == '\0')
3425                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3426         complete(&adapter->fw_done);
3427 }
3428
3429 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3430 {
3431         struct device *dev = &adapter->vdev->dev;
3432         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3433         union ibmvnic_crq crq;
3434         int i;
3435
3436         dma_unmap_single(dev, adapter->ip_offload_tok,
3437                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3438
3439         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3440         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3441                 netdev_dbg(adapter->netdev, "%016lx\n",
3442                            ((unsigned long int *)(buf))[i]);
3443
3444         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3445         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3446         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3447                    buf->tcp_ipv4_chksum);
3448         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3449                    buf->tcp_ipv6_chksum);
3450         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3451                    buf->udp_ipv4_chksum);
3452         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3453                    buf->udp_ipv6_chksum);
3454         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3455                    buf->large_tx_ipv4);
3456         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3457                    buf->large_tx_ipv6);
3458         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3459                    buf->large_rx_ipv4);
3460         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3461                    buf->large_rx_ipv6);
3462         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3463                    buf->max_ipv4_header_size);
3464         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3465                    buf->max_ipv6_header_size);
3466         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3467                    buf->max_tcp_header_size);
3468         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3469                    buf->max_udp_header_size);
3470         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3471                    buf->max_large_tx_size);
3472         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3473                    buf->max_large_rx_size);
3474         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3475                    buf->ipv6_extension_header);
3476         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3477                    buf->tcp_pseudosum_req);
3478         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3479                    buf->num_ipv6_ext_headers);
3480         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3481                    buf->off_ipv6_ext_headers);
3482
3483         adapter->ip_offload_ctrl_tok =
3484             dma_map_single(dev, &adapter->ip_offload_ctrl,
3485                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3486
3487         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3488                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3489                 return;
3490         }
3491
3492         adapter->ip_offload_ctrl.len =
3493             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3494         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3495         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3496         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3497         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3498         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3499         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3500         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3501         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3502         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3503
3504         /* large_rx disabled for now, additional features needed */
3505         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3506         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3507
3508         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3509
3510         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3511                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3512
3513         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3514                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3515
3516         if ((adapter->netdev->features &
3517             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3518                 adapter->netdev->features |= NETIF_F_RXCSUM;
3519
3520         if (buf->large_tx_ipv4)
3521                 adapter->netdev->features |= NETIF_F_TSO;
3522         if (buf->large_tx_ipv6)
3523                 adapter->netdev->features |= NETIF_F_TSO6;
3524
3525         adapter->netdev->hw_features |= adapter->netdev->features;
3526
3527         memset(&crq, 0, sizeof(crq));
3528         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3529         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3530         crq.control_ip_offload.len =
3531             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3532         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3533         ibmvnic_send_crq(adapter, &crq);
3534 }
3535
3536 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3537                                   struct ibmvnic_adapter *adapter)
3538 {
3539         struct device *dev = &adapter->vdev->dev;
3540         struct ibmvnic_error_buff *error_buff, *tmp;
3541         unsigned long flags;
3542         bool found = false;
3543         int i;
3544
3545         if (!crq->request_error_rsp.rc.code) {
3546                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3547                          crq->request_error_rsp.rc.code);
3548                 return;
3549         }
3550
3551         spin_lock_irqsave(&adapter->error_list_lock, flags);
3552         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3553                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3554                         found = true;
3555                         list_del(&error_buff->list);
3556                         break;
3557                 }
3558         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3559
3560         if (!found) {
3561                 dev_err(dev, "Couldn't find error id %x\n",
3562                         be32_to_cpu(crq->request_error_rsp.error_id));
3563                 return;
3564         }
3565
3566         dev_err(dev, "Detailed info for error id %x:",
3567                 be32_to_cpu(crq->request_error_rsp.error_id));
3568
3569         for (i = 0; i < error_buff->len; i++) {
3570                 pr_cont("%02x", (int)error_buff->buff[i]);
3571                 if (i % 8 == 7)
3572                         pr_cont(" ");
3573         }
3574         pr_cont("\n");
3575
3576         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3577                          DMA_FROM_DEVICE);
3578         kfree(error_buff->buff);
3579         kfree(error_buff);
3580 }
3581
3582 static void request_error_information(struct ibmvnic_adapter *adapter,
3583                                       union ibmvnic_crq *err_crq)
3584 {
3585         struct device *dev = &adapter->vdev->dev;
3586         struct net_device *netdev = adapter->netdev;
3587         struct ibmvnic_error_buff *error_buff;
3588         unsigned long timeout = msecs_to_jiffies(30000);
3589         union ibmvnic_crq crq;
3590         unsigned long flags;
3591         int rc, detail_len;
3592
3593         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3594         if (!error_buff)
3595                 return;
3596
3597         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3598         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3599         if (!error_buff->buff) {
3600                 kfree(error_buff);
3601                 return;
3602         }
3603
3604         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3605                                          DMA_FROM_DEVICE);
3606         if (dma_mapping_error(dev, error_buff->dma)) {
3607                 netdev_err(netdev, "Couldn't map error buffer\n");
3608                 kfree(error_buff->buff);
3609                 kfree(error_buff);
3610                 return;
3611         }
3612
3613         error_buff->len = detail_len;
3614         error_buff->error_id = err_crq->error_indication.error_id;
3615
3616         spin_lock_irqsave(&adapter->error_list_lock, flags);
3617         list_add_tail(&error_buff->list, &adapter->errors);
3618         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3619
3620         memset(&crq, 0, sizeof(crq));
3621         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3622         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3623         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3624         crq.request_error_info.len = cpu_to_be32(detail_len);
3625         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3626
3627         rc = ibmvnic_send_crq(adapter, &crq);
3628         if (rc) {
3629                 netdev_err(netdev, "failed to request error information\n");
3630                 goto err_info_fail;
3631         }
3632
3633         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3634                 netdev_err(netdev, "timeout waiting for error information\n");
3635                 goto err_info_fail;
3636         }
3637
3638         return;
3639
3640 err_info_fail:
3641         spin_lock_irqsave(&adapter->error_list_lock, flags);
3642         list_del(&error_buff->list);
3643         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3644
3645         kfree(error_buff->buff);
3646         kfree(error_buff);
3647 }
3648
3649 static void handle_error_indication(union ibmvnic_crq *crq,
3650                                     struct ibmvnic_adapter *adapter)
3651 {
3652         struct device *dev = &adapter->vdev->dev;
3653
3654         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3655                 crq->error_indication.flags
3656                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3657                 be32_to_cpu(crq->error_indication.error_id),
3658                 be16_to_cpu(crq->error_indication.error_cause));
3659
3660         if (be32_to_cpu(crq->error_indication.error_id))
3661                 request_error_information(adapter, crq);
3662
3663         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3664                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3665         else
3666                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3667 }
3668
3669 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3670                                  struct ibmvnic_adapter *adapter)
3671 {
3672         struct net_device *netdev = adapter->netdev;
3673         struct device *dev = &adapter->vdev->dev;
3674         long rc;
3675
3676         rc = crq->change_mac_addr_rsp.rc.code;
3677         if (rc) {
3678                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3679                 goto out;
3680         }
3681         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3682                ETH_ALEN);
3683 out:
3684         complete(&adapter->fw_done);
3685         return rc;
3686 }
3687
3688 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3689                                    struct ibmvnic_adapter *adapter)
3690 {
3691         struct device *dev = &adapter->vdev->dev;
3692         u64 *req_value;
3693         char *name;
3694
3695         atomic_dec(&adapter->running_cap_crqs);
3696         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3697         case REQ_TX_QUEUES:
3698                 req_value = &adapter->req_tx_queues;
3699                 name = "tx";
3700                 break;
3701         case REQ_RX_QUEUES:
3702                 req_value = &adapter->req_rx_queues;
3703                 name = "rx";
3704                 break;
3705         case REQ_RX_ADD_QUEUES:
3706                 req_value = &adapter->req_rx_add_queues;
3707                 name = "rx_add";
3708                 break;
3709         case REQ_TX_ENTRIES_PER_SUBCRQ:
3710                 req_value = &adapter->req_tx_entries_per_subcrq;
3711                 name = "tx_entries_per_subcrq";
3712                 break;
3713         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3714                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3715                 name = "rx_add_entries_per_subcrq";
3716                 break;
3717         case REQ_MTU:
3718                 req_value = &adapter->req_mtu;
3719                 name = "mtu";
3720                 break;
3721         case PROMISC_REQUESTED:
3722                 req_value = &adapter->promisc;
3723                 name = "promisc";
3724                 break;
3725         default:
3726                 dev_err(dev, "Got invalid cap request rsp %d\n",
3727                         crq->request_capability.capability);
3728                 return;
3729         }
3730
3731         switch (crq->request_capability_rsp.rc.code) {
3732         case SUCCESS:
3733                 break;
3734         case PARTIALSUCCESS:
3735                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3736                          *req_value,
3737                          (long int)be64_to_cpu(crq->request_capability_rsp.
3738                                                number), name);
3739
3740                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3741                     REQ_MTU) {
3742                         pr_err("mtu of %llu is not supported. Reverting.\n",
3743                                *req_value);
3744                         *req_value = adapter->fallback.mtu;
3745                 } else {
3746                         *req_value =
3747                                 be64_to_cpu(crq->request_capability_rsp.number);
3748                 }
3749
3750                 ibmvnic_send_req_caps(adapter, 1);
3751                 return;
3752         default:
3753                 dev_err(dev, "Error %d in request cap rsp\n",
3754                         crq->request_capability_rsp.rc.code);
3755                 return;
3756         }
3757
3758         /* Done receiving requested capabilities, query IP offload support */
3759         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3760                 union ibmvnic_crq newcrq;
3761                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3762                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3763                     &adapter->ip_offload_buf;
3764
3765                 adapter->wait_capability = false;
3766                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3767                                                          buf_sz,
3768                                                          DMA_FROM_DEVICE);
3769
3770                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3771                         if (!firmware_has_feature(FW_FEATURE_CMO))
3772                                 dev_err(dev, "Couldn't map offload buffer\n");
3773                         return;
3774                 }
3775
3776                 memset(&newcrq, 0, sizeof(newcrq));
3777                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3778                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3779                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3780                 newcrq.query_ip_offload.ioba =
3781                     cpu_to_be32(adapter->ip_offload_tok);
3782
3783                 ibmvnic_send_crq(adapter, &newcrq);
3784         }
3785 }
3786
3787 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3788                             struct ibmvnic_adapter *adapter)
3789 {
3790         struct device *dev = &adapter->vdev->dev;
3791         struct net_device *netdev = adapter->netdev;
3792         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3793         struct ibmvnic_login_buffer *login = adapter->login_buf;
3794         int i;
3795
3796         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3797                          DMA_BIDIRECTIONAL);
3798         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3799                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3800
3801         /* If the number of queues requested can't be allocated by the
3802          * server, the login response will return with code 1. We will need
3803          * to resend the login buffer with fewer queues requested.
3804          */
3805         if (login_rsp_crq->generic.rc.code) {
3806                 adapter->renegotiate = true;
3807                 complete(&adapter->init_done);
3808                 return 0;
3809         }
3810
3811         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3812
3813         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3814         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3815                 netdev_dbg(adapter->netdev, "%016lx\n",
3816                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3817         }
3818
3819         /* Sanity checks */
3820         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3821             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3822              adapter->req_rx_add_queues !=
3823              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3824                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3825                 ibmvnic_remove(adapter->vdev);
3826                 return -EIO;
3827         }
3828         release_login_buffer(adapter);
3829         complete(&adapter->init_done);
3830
3831         return 0;
3832 }
3833
3834 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3835                                      struct ibmvnic_adapter *adapter)
3836 {
3837         struct device *dev = &adapter->vdev->dev;
3838         long rc;
3839
3840         rc = crq->request_unmap_rsp.rc.code;
3841         if (rc)
3842                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3843 }
3844
3845 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3846                                  struct ibmvnic_adapter *adapter)
3847 {
3848         struct net_device *netdev = adapter->netdev;
3849         struct device *dev = &adapter->vdev->dev;
3850         long rc;
3851
3852         rc = crq->query_map_rsp.rc.code;
3853         if (rc) {
3854                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3855                 return;
3856         }
3857         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3858                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3859                    crq->query_map_rsp.free_pages);
3860 }
3861
3862 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3863                                  struct ibmvnic_adapter *adapter)
3864 {
3865         struct net_device *netdev = adapter->netdev;
3866         struct device *dev = &adapter->vdev->dev;
3867         long rc;
3868
3869         atomic_dec(&adapter->running_cap_crqs);
3870         netdev_dbg(netdev, "Outstanding queries: %d\n",
3871                    atomic_read(&adapter->running_cap_crqs));
3872         rc = crq->query_capability.rc.code;
3873         if (rc) {
3874                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3875                 goto out;
3876         }
3877
3878         switch (be16_to_cpu(crq->query_capability.capability)) {
3879         case MIN_TX_QUEUES:
3880                 adapter->min_tx_queues =
3881                     be64_to_cpu(crq->query_capability.number);
3882                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3883                            adapter->min_tx_queues);
3884                 break;
3885         case MIN_RX_QUEUES:
3886                 adapter->min_rx_queues =
3887                     be64_to_cpu(crq->query_capability.number);
3888                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3889                            adapter->min_rx_queues);
3890                 break;
3891         case MIN_RX_ADD_QUEUES:
3892                 adapter->min_rx_add_queues =
3893                     be64_to_cpu(crq->query_capability.number);
3894                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3895                            adapter->min_rx_add_queues);
3896                 break;
3897         case MAX_TX_QUEUES:
3898                 adapter->max_tx_queues =
3899                     be64_to_cpu(crq->query_capability.number);
3900                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3901                            adapter->max_tx_queues);
3902                 break;
3903         case MAX_RX_QUEUES:
3904                 adapter->max_rx_queues =
3905                     be64_to_cpu(crq->query_capability.number);
3906                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3907                            adapter->max_rx_queues);
3908                 break;
3909         case MAX_RX_ADD_QUEUES:
3910                 adapter->max_rx_add_queues =
3911                     be64_to_cpu(crq->query_capability.number);
3912                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3913                            adapter->max_rx_add_queues);
3914                 break;
3915         case MIN_TX_ENTRIES_PER_SUBCRQ:
3916                 adapter->min_tx_entries_per_subcrq =
3917                     be64_to_cpu(crq->query_capability.number);
3918                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3919                            adapter->min_tx_entries_per_subcrq);
3920                 break;
3921         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3922                 adapter->min_rx_add_entries_per_subcrq =
3923                     be64_to_cpu(crq->query_capability.number);
3924                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3925                            adapter->min_rx_add_entries_per_subcrq);
3926                 break;
3927         case MAX_TX_ENTRIES_PER_SUBCRQ:
3928                 adapter->max_tx_entries_per_subcrq =
3929                     be64_to_cpu(crq->query_capability.number);
3930                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3931                            adapter->max_tx_entries_per_subcrq);
3932                 break;
3933         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3934                 adapter->max_rx_add_entries_per_subcrq =
3935                     be64_to_cpu(crq->query_capability.number);
3936                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3937                            adapter->max_rx_add_entries_per_subcrq);
3938                 break;
3939         case TCP_IP_OFFLOAD:
3940                 adapter->tcp_ip_offload =
3941                     be64_to_cpu(crq->query_capability.number);
3942                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3943                            adapter->tcp_ip_offload);
3944                 break;
3945         case PROMISC_SUPPORTED:
3946                 adapter->promisc_supported =
3947                     be64_to_cpu(crq->query_capability.number);
3948                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3949                            adapter->promisc_supported);
3950                 break;
3951         case MIN_MTU:
3952                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3953                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3954                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3955                 break;
3956         case MAX_MTU:
3957                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3958                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3959                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3960                 break;
3961         case MAX_MULTICAST_FILTERS:
3962                 adapter->max_multicast_filters =
3963                     be64_to_cpu(crq->query_capability.number);
3964                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3965                            adapter->max_multicast_filters);
3966                 break;
3967         case VLAN_HEADER_INSERTION:
3968                 adapter->vlan_header_insertion =
3969                     be64_to_cpu(crq->query_capability.number);
3970                 if (adapter->vlan_header_insertion)
3971                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3972                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3973                            adapter->vlan_header_insertion);
3974                 break;
3975         case RX_VLAN_HEADER_INSERTION:
3976                 adapter->rx_vlan_header_insertion =
3977                     be64_to_cpu(crq->query_capability.number);
3978                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3979                            adapter->rx_vlan_header_insertion);
3980                 break;
3981         case MAX_TX_SG_ENTRIES:
3982                 adapter->max_tx_sg_entries =
3983                     be64_to_cpu(crq->query_capability.number);
3984                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3985                            adapter->max_tx_sg_entries);
3986                 break;
3987         case RX_SG_SUPPORTED:
3988                 adapter->rx_sg_supported =
3989                     be64_to_cpu(crq->query_capability.number);
3990                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3991                            adapter->rx_sg_supported);
3992                 break;
3993         case OPT_TX_COMP_SUB_QUEUES:
3994                 adapter->opt_tx_comp_sub_queues =
3995                     be64_to_cpu(crq->query_capability.number);
3996                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3997                            adapter->opt_tx_comp_sub_queues);
3998                 break;
3999         case OPT_RX_COMP_QUEUES:
4000                 adapter->opt_rx_comp_queues =
4001                     be64_to_cpu(crq->query_capability.number);
4002                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4003                            adapter->opt_rx_comp_queues);
4004                 break;
4005         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4006                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4007                     be64_to_cpu(crq->query_capability.number);
4008                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4009                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4010                 break;
4011         case OPT_TX_ENTRIES_PER_SUBCRQ:
4012                 adapter->opt_tx_entries_per_subcrq =
4013                     be64_to_cpu(crq->query_capability.number);
4014                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4015                            adapter->opt_tx_entries_per_subcrq);
4016                 break;
4017         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4018                 adapter->opt_rxba_entries_per_subcrq =
4019                     be64_to_cpu(crq->query_capability.number);
4020                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4021                            adapter->opt_rxba_entries_per_subcrq);
4022                 break;
4023         case TX_RX_DESC_REQ:
4024                 adapter->tx_rx_desc_req = crq->query_capability.number;
4025                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4026                            adapter->tx_rx_desc_req);
4027                 break;
4028
4029         default:
4030                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4031                            crq->query_capability.capability);
4032         }
4033
4034 out:
4035         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4036                 adapter->wait_capability = false;
4037                 ibmvnic_send_req_caps(adapter, 0);
4038         }
4039 }
4040
4041 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4042                                struct ibmvnic_adapter *adapter)
4043 {
4044         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4045         struct net_device *netdev = adapter->netdev;
4046         struct device *dev = &adapter->vdev->dev;
4047         u64 *u64_crq = (u64 *)crq;
4048         long rc;
4049
4050         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4051                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4052                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4053         switch (gen_crq->first) {
4054         case IBMVNIC_CRQ_INIT_RSP:
4055                 switch (gen_crq->cmd) {
4056                 case IBMVNIC_CRQ_INIT:
4057                         dev_info(dev, "Partner initialized\n");
4058                         adapter->from_passive_init = true;
4059                         complete(&adapter->init_done);
4060                         break;
4061                 case IBMVNIC_CRQ_INIT_COMPLETE:
4062                         dev_info(dev, "Partner initialization complete\n");
4063                         send_version_xchg(adapter);
4064                         break;
4065                 default:
4066                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4067                 }
4068                 return;
4069         case IBMVNIC_CRQ_XPORT_EVENT:
4070                 netif_carrier_off(netdev);
4071                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4072                         dev_info(dev, "Migrated, re-enabling adapter\n");
4073                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4074                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4075                         dev_info(dev, "Backing device failover detected\n");
4076                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4077                 } else {
4078                         /* The adapter lost the connection */
4079                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4080                                 gen_crq->cmd);
4081                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4082                 }
4083                 return;
4084         case IBMVNIC_CRQ_CMD_RSP:
4085                 break;
4086         default:
4087                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4088                         gen_crq->first);
4089                 return;
4090         }
4091
4092         switch (gen_crq->cmd) {
4093         case VERSION_EXCHANGE_RSP:
4094                 rc = crq->version_exchange_rsp.rc.code;
4095                 if (rc) {
4096                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4097                         break;
4098                 }
4099                 dev_info(dev, "Partner protocol version is %d\n",
4100                          crq->version_exchange_rsp.version);
4101                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4102                     ibmvnic_version)
4103                         ibmvnic_version =
4104                             be16_to_cpu(crq->version_exchange_rsp.version);
4105                 send_cap_queries(adapter);
4106                 break;
4107         case QUERY_CAPABILITY_RSP:
4108                 handle_query_cap_rsp(crq, adapter);
4109                 break;
4110         case QUERY_MAP_RSP:
4111                 handle_query_map_rsp(crq, adapter);
4112                 break;
4113         case REQUEST_MAP_RSP:
4114                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4115                 complete(&adapter->fw_done);
4116                 break;
4117         case REQUEST_UNMAP_RSP:
4118                 handle_request_unmap_rsp(crq, adapter);
4119                 break;
4120         case REQUEST_CAPABILITY_RSP:
4121                 handle_request_cap_rsp(crq, adapter);
4122                 break;
4123         case LOGIN_RSP:
4124                 netdev_dbg(netdev, "Got Login Response\n");
4125                 handle_login_rsp(crq, adapter);
4126                 break;
4127         case LOGICAL_LINK_STATE_RSP:
4128                 netdev_dbg(netdev,
4129                            "Got Logical Link State Response, state: %d rc: %d\n",
4130                            crq->logical_link_state_rsp.link_state,
4131                            crq->logical_link_state_rsp.rc.code);
4132                 adapter->logical_link_state =
4133                     crq->logical_link_state_rsp.link_state;
4134                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4135                 complete(&adapter->init_done);
4136                 break;
4137         case LINK_STATE_INDICATION:
4138                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4139                 adapter->phys_link_state =
4140                     crq->link_state_indication.phys_link_state;
4141                 adapter->logical_link_state =
4142                     crq->link_state_indication.logical_link_state;
4143                 break;
4144         case CHANGE_MAC_ADDR_RSP:
4145                 netdev_dbg(netdev, "Got MAC address change Response\n");
4146                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4147                 break;
4148         case ERROR_INDICATION:
4149                 netdev_dbg(netdev, "Got Error Indication\n");
4150                 handle_error_indication(crq, adapter);
4151                 break;
4152         case REQUEST_ERROR_RSP:
4153                 netdev_dbg(netdev, "Got Error Detail Response\n");
4154                 handle_error_info_rsp(crq, adapter);
4155                 break;
4156         case REQUEST_STATISTICS_RSP:
4157                 netdev_dbg(netdev, "Got Statistics Response\n");
4158                 complete(&adapter->stats_done);
4159                 break;
4160         case QUERY_IP_OFFLOAD_RSP:
4161                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4162                 handle_query_ip_offload_rsp(adapter);
4163                 break;
4164         case MULTICAST_CTRL_RSP:
4165                 netdev_dbg(netdev, "Got multicast control Response\n");
4166                 break;
4167         case CONTROL_IP_OFFLOAD_RSP:
4168                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4169                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4170                                  sizeof(adapter->ip_offload_ctrl),
4171                                  DMA_TO_DEVICE);
4172                 complete(&adapter->init_done);
4173                 break;
4174         case COLLECT_FW_TRACE_RSP:
4175                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4176                 complete(&adapter->fw_done);
4177                 break;
4178         case GET_VPD_SIZE_RSP:
4179                 handle_vpd_size_rsp(crq, adapter);
4180                 break;
4181         case GET_VPD_RSP:
4182                 handle_vpd_rsp(crq, adapter);
4183                 break;
4184         default:
4185                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4186                            gen_crq->cmd);
4187         }
4188 }
4189
4190 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4191 {
4192         struct ibmvnic_adapter *adapter = instance;
4193
4194         tasklet_schedule(&adapter->tasklet);
4195         return IRQ_HANDLED;
4196 }
4197
4198 static void ibmvnic_tasklet(void *data)
4199 {
4200         struct ibmvnic_adapter *adapter = data;
4201         struct ibmvnic_crq_queue *queue = &adapter->crq;
4202         union ibmvnic_crq *crq;
4203         unsigned long flags;
4204         bool done = false;
4205
4206         spin_lock_irqsave(&queue->lock, flags);
4207         while (!done) {
4208                 /* Pull all the valid messages off the CRQ */
4209                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4210                         ibmvnic_handle_crq(crq, adapter);
4211                         crq->generic.first = 0;
4212                 }
4213
4214                 /* remain in tasklet until all
4215                  * capabilities responses are received
4216                  */
4217                 if (!adapter->wait_capability)
4218                         done = true;
4219         }
4220         /* if capabilities CRQ's were sent in this tasklet, the following
4221          * tasklet must wait until all responses are received
4222          */
4223         if (atomic_read(&adapter->running_cap_crqs) != 0)
4224                 adapter->wait_capability = true;
4225         spin_unlock_irqrestore(&queue->lock, flags);
4226 }
4227
4228 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4229 {
4230         struct vio_dev *vdev = adapter->vdev;
4231         int rc;
4232
4233         do {
4234                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4235         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4236
4237         if (rc)
4238                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4239
4240         return rc;
4241 }
4242
4243 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4244 {
4245         struct ibmvnic_crq_queue *crq = &adapter->crq;
4246         struct device *dev = &adapter->vdev->dev;
4247         struct vio_dev *vdev = adapter->vdev;
4248         int rc;
4249
4250         /* Close the CRQ */
4251         do {
4252                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4253         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4254
4255         /* Clean out the queue */
4256         memset(crq->msgs, 0, PAGE_SIZE);
4257         crq->cur = 0;
4258
4259         /* And re-open it again */
4260         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4261                                 crq->msg_token, PAGE_SIZE);
4262
4263         if (rc == H_CLOSED)
4264                 /* Adapter is good, but other end is not ready */
4265                 dev_warn(dev, "Partner adapter not ready\n");
4266         else if (rc != 0)
4267                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4268
4269         return rc;
4270 }
4271
4272 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4273 {
4274         struct ibmvnic_crq_queue *crq = &adapter->crq;
4275         struct vio_dev *vdev = adapter->vdev;
4276         long rc;
4277
4278         if (!crq->msgs)
4279                 return;
4280
4281         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4282         free_irq(vdev->irq, adapter);
4283         tasklet_kill(&adapter->tasklet);
4284         do {
4285                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4286         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4287
4288         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4289                          DMA_BIDIRECTIONAL);
4290         free_page((unsigned long)crq->msgs);
4291         crq->msgs = NULL;
4292 }
4293
4294 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4295 {
4296         struct ibmvnic_crq_queue *crq = &adapter->crq;
4297         struct device *dev = &adapter->vdev->dev;
4298         struct vio_dev *vdev = adapter->vdev;
4299         int rc, retrc = -ENOMEM;
4300
4301         if (crq->msgs)
4302                 return 0;
4303
4304         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4305         /* Should we allocate more than one page? */
4306
4307         if (!crq->msgs)
4308                 return -ENOMEM;
4309
4310         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4311         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4312                                         DMA_BIDIRECTIONAL);
4313         if (dma_mapping_error(dev, crq->msg_token))
4314                 goto map_failed;
4315
4316         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4317                                 crq->msg_token, PAGE_SIZE);
4318
4319         if (rc == H_RESOURCE)
4320                 /* maybe kexecing and resource is busy. try a reset */
4321                 rc = ibmvnic_reset_crq(adapter);
4322         retrc = rc;
4323
4324         if (rc == H_CLOSED) {
4325                 dev_warn(dev, "Partner adapter not ready\n");
4326         } else if (rc) {
4327                 dev_warn(dev, "Error %d opening adapter\n", rc);
4328                 goto reg_crq_failed;
4329         }
4330
4331         retrc = 0;
4332
4333         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4334                      (unsigned long)adapter);
4335
4336         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4337         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4338                          adapter);
4339         if (rc) {
4340                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4341                         vdev->irq, rc);
4342                 goto req_irq_failed;
4343         }
4344
4345         rc = vio_enable_interrupts(vdev);
4346         if (rc) {
4347                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4348                 goto req_irq_failed;
4349         }
4350
4351         crq->cur = 0;
4352         spin_lock_init(&crq->lock);
4353
4354         return retrc;
4355
4356 req_irq_failed:
4357         tasklet_kill(&adapter->tasklet);
4358         do {
4359                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4360         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4361 reg_crq_failed:
4362         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4363 map_failed:
4364         free_page((unsigned long)crq->msgs);
4365         crq->msgs = NULL;
4366         return retrc;
4367 }
4368
4369 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4370 {
4371         struct device *dev = &adapter->vdev->dev;
4372         unsigned long timeout = msecs_to_jiffies(30000);
4373         u64 old_num_rx_queues, old_num_tx_queues;
4374         int rc;
4375
4376         if (adapter->resetting && !adapter->wait_for_reset) {
4377                 rc = ibmvnic_reset_crq(adapter);
4378                 if (!rc)
4379                         rc = vio_enable_interrupts(adapter->vdev);
4380         } else {
4381                 rc = init_crq_queue(adapter);
4382         }
4383
4384         if (rc) {
4385                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4386                 return rc;
4387         }
4388
4389         adapter->from_passive_init = false;
4390
4391         old_num_rx_queues = adapter->req_rx_queues;
4392         old_num_tx_queues = adapter->req_tx_queues;
4393
4394         init_completion(&adapter->init_done);
4395         adapter->init_done_rc = 0;
4396         ibmvnic_send_crq_init(adapter);
4397         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4398                 dev_err(dev, "Initialization sequence timed out\n");
4399                 return -1;
4400         }
4401
4402         if (adapter->init_done_rc) {
4403                 release_crq_queue(adapter);
4404                 return adapter->init_done_rc;
4405         }
4406
4407         if (adapter->from_passive_init) {
4408                 adapter->state = VNIC_OPEN;
4409                 adapter->from_passive_init = false;
4410                 return -1;
4411         }
4412
4413         if (adapter->resetting && !adapter->wait_for_reset) {
4414                 if (adapter->req_rx_queues != old_num_rx_queues ||
4415                     adapter->req_tx_queues != old_num_tx_queues) {
4416                         release_sub_crqs(adapter, 0);
4417                         rc = init_sub_crqs(adapter);
4418                 } else {
4419                         rc = reset_sub_crq_queues(adapter);
4420                 }
4421         } else {
4422                 rc = init_sub_crqs(adapter);
4423         }
4424
4425         if (rc) {
4426                 dev_err(dev, "Initialization of sub crqs failed\n");
4427                 release_crq_queue(adapter);
4428                 return rc;
4429         }
4430
4431         rc = init_sub_crq_irqs(adapter);
4432         if (rc) {
4433                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4434                 release_crq_queue(adapter);
4435         }
4436
4437         rc = init_stats_buffers(adapter);
4438         if (rc)
4439                 return rc;
4440
4441         rc = init_stats_token(adapter);
4442         if (rc)
4443                 return rc;
4444
4445         return rc;
4446 }
4447
4448 static struct device_attribute dev_attr_failover;
4449
4450 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4451 {
4452         struct ibmvnic_adapter *adapter;
4453         struct net_device *netdev;
4454         unsigned char *mac_addr_p;
4455         int rc;
4456
4457         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4458                 dev->unit_address);
4459
4460         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4461                                                         VETH_MAC_ADDR, NULL);
4462         if (!mac_addr_p) {
4463                 dev_err(&dev->dev,
4464                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4465                         __FILE__, __LINE__);
4466                 return 0;
4467         }
4468
4469         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4470                                    IBMVNIC_MAX_QUEUES);
4471         if (!netdev)
4472                 return -ENOMEM;
4473
4474         adapter = netdev_priv(netdev);
4475         adapter->state = VNIC_PROBING;
4476         dev_set_drvdata(&dev->dev, netdev);
4477         adapter->vdev = dev;
4478         adapter->netdev = netdev;
4479
4480         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4481         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4482         netdev->irq = dev->irq;
4483         netdev->netdev_ops = &ibmvnic_netdev_ops;
4484         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4485         SET_NETDEV_DEV(netdev, &dev->dev);
4486
4487         spin_lock_init(&adapter->stats_lock);
4488
4489         INIT_LIST_HEAD(&adapter->errors);
4490         spin_lock_init(&adapter->error_list_lock);
4491
4492         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4493         INIT_LIST_HEAD(&adapter->rwi_list);
4494         mutex_init(&adapter->reset_lock);
4495         mutex_init(&adapter->rwi_lock);
4496         adapter->resetting = false;
4497
4498         adapter->mac_change_pending = false;
4499
4500         do {
4501                 rc = ibmvnic_init(adapter);
4502                 if (rc && rc != EAGAIN)
4503                         goto ibmvnic_init_fail;
4504         } while (rc == EAGAIN);
4505
4506         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4507         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4508         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4509
4510         rc = device_create_file(&dev->dev, &dev_attr_failover);
4511         if (rc)
4512                 goto ibmvnic_init_fail;
4513
4514         netif_carrier_off(netdev);
4515         rc = register_netdev(netdev);
4516         if (rc) {
4517                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4518                 goto ibmvnic_register_fail;
4519         }
4520         dev_info(&dev->dev, "ibmvnic registered\n");
4521
4522         adapter->state = VNIC_PROBED;
4523
4524         adapter->wait_for_reset = false;
4525
4526         return 0;
4527
4528 ibmvnic_register_fail:
4529         device_remove_file(&dev->dev, &dev_attr_failover);
4530
4531 ibmvnic_init_fail:
4532         release_sub_crqs(adapter, 1);
4533         release_crq_queue(adapter);
4534         free_netdev(netdev);
4535
4536         return rc;
4537 }
4538
4539 static int ibmvnic_remove(struct vio_dev *dev)
4540 {
4541         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4542         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4543
4544         adapter->state = VNIC_REMOVING;
4545         unregister_netdev(netdev);
4546         mutex_lock(&adapter->reset_lock);
4547
4548         release_resources(adapter);
4549         release_sub_crqs(adapter, 1);
4550         release_crq_queue(adapter);
4551
4552         release_stats_token(adapter);
4553         release_stats_buffers(adapter);
4554
4555         adapter->state = VNIC_REMOVED;
4556
4557         mutex_unlock(&adapter->reset_lock);
4558         device_remove_file(&dev->dev, &dev_attr_failover);
4559         free_netdev(netdev);
4560         dev_set_drvdata(&dev->dev, NULL);
4561
4562         return 0;
4563 }
4564
4565 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4566                               const char *buf, size_t count)
4567 {
4568         struct net_device *netdev = dev_get_drvdata(dev);
4569         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4570         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4571         __be64 session_token;
4572         long rc;
4573
4574         if (!sysfs_streq(buf, "1"))
4575                 return -EINVAL;
4576
4577         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4578                          H_GET_SESSION_TOKEN, 0, 0, 0);
4579         if (rc) {
4580                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4581                            rc);
4582                 return -EINVAL;
4583         }
4584
4585         session_token = (__be64)retbuf[0];
4586         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4587                    be64_to_cpu(session_token));
4588         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4589                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4590         if (rc) {
4591                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4592                            rc);
4593                 return -EINVAL;
4594         }
4595
4596         return count;
4597 }
4598
4599 static DEVICE_ATTR_WO(failover);
4600
4601 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4602 {
4603         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4604         struct ibmvnic_adapter *adapter;
4605         struct iommu_table *tbl;
4606         unsigned long ret = 0;
4607         int i;
4608
4609         tbl = get_iommu_table_base(&vdev->dev);
4610
4611         /* netdev inits at probe time along with the structures we need below*/
4612         if (!netdev)
4613                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4614
4615         adapter = netdev_priv(netdev);
4616
4617         ret += PAGE_SIZE; /* the crq message queue */
4618         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4619
4620         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4621                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4622
4623         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4624              i++)
4625                 ret += adapter->rx_pool[i].size *
4626                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4627
4628         return ret;
4629 }
4630
4631 static int ibmvnic_resume(struct device *dev)
4632 {
4633         struct net_device *netdev = dev_get_drvdata(dev);
4634         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4635
4636         if (adapter->state != VNIC_OPEN)
4637                 return 0;
4638
4639         tasklet_schedule(&adapter->tasklet);
4640
4641         return 0;
4642 }
4643
4644 static const struct vio_device_id ibmvnic_device_table[] = {
4645         {"network", "IBM,vnic"},
4646         {"", "" }
4647 };
4648 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4649
4650 static const struct dev_pm_ops ibmvnic_pm_ops = {
4651         .resume = ibmvnic_resume
4652 };
4653
4654 static struct vio_driver ibmvnic_driver = {
4655         .id_table       = ibmvnic_device_table,
4656         .probe          = ibmvnic_probe,
4657         .remove         = ibmvnic_remove,
4658         .get_desired_dma = ibmvnic_get_desired_dma,
4659         .name           = ibmvnic_driver_name,
4660         .pm             = &ibmvnic_pm_ops,
4661 };
4662
4663 /* module functions */
4664 static int __init ibmvnic_module_init(void)
4665 {
4666         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4667                 IBMVNIC_DRIVER_VERSION);
4668
4669         return vio_register_driver(&ibmvnic_driver);
4670 }
4671
4672 static void __exit ibmvnic_module_exit(void)
4673 {
4674         vio_unregister_driver(&ibmvnic_driver);
4675 }
4676
4677 module_init(ibmvnic_module_init);
4678 module_exit(ibmvnic_module_exit);