drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/if_arp.h>
  63 #include <linux/in.h>
  64 #include <linux/ip.h>
  65 #include <linux/ipv6.h>
  66 #include <linux/irq.h>
  67 #include <linux/kthread.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78 #include <linux/if_vlan.h>
  79 #include <linux/utsname.h>
  80
  81 #include "ibmvnic.h"
  82
  83 static const char ibmvnic_driver_name[] = "ibmvnic";
  84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  85
  86 MODULE_AUTHOR("Santiago Leon");
  87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  88 MODULE_LICENSE("GPL");
  89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  90
  91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  92 static int ibmvnic_remove(struct vio_dev *);
  93 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 114 static void send_login(struct ibmvnic_adapter *adapter);
 115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 116 static int init_sub_crqs(struct ibmvnic_adapter *);
 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 118 static int ibmvnic_init(struct ibmvnic_adapter *);
 119 static void release_crq_queue(struct ibmvnic_adapter *);
 120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
 121
 122 struct ibmvnic_stat {
 123         char name[ETH_GSTRING_LEN];
 124         int offset;
 125 };
 126
 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 128                              offsetof(struct ibmvnic_statistics, stat))
 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 130
 131 static const struct ibmvnic_stat ibmvnic_stats[] = {
 132         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 133         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 134         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 135         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 136         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 137         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 138         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 139         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 140         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 141         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 142         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 143         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 144         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 145         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 146         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 147         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 148         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 149         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 150         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 151         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 152         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 153         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 154 };
 155
 156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 157                           unsigned long length, unsigned long *number,
 158                           unsigned long *irq)
 159 {
 160         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 161         long rc;
 162
 163         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 164         *number = retbuf[0];
 165         *irq = retbuf[1];
 166
 167         return rc;
 168 }
 169
 170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 171                                 struct ibmvnic_long_term_buff *ltb, int size)
 172 {
 173         struct device *dev = &adapter->vdev->dev;
 174
 175         ltb->size = size;
 176         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 177                                        GFP_KERNEL);
 178
 179         if (!ltb->buff) {
 180                 dev_err(dev, "Couldn't alloc long term buffer\n");
 181                 return -ENOMEM;
 182         }
 183         ltb->map_id = adapter->map_id;
 184         adapter->map_id++;
 185
 186         init_completion(&adapter->fw_done);
 187         send_request_map(adapter, ltb->addr,
 188                          ltb->size, ltb->map_id);
 189         wait_for_completion(&adapter->fw_done);
 190
 191         if (adapter->fw_done_rc) {
 192                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 193                         adapter->fw_done_rc);
 194                 return -1;
 195         }
 196         return 0;
 197 }
 198
 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 200                                 struct ibmvnic_long_term_buff *ltb)
 201 {
 202         struct device *dev = &adapter->vdev->dev;
 203
 204         if (!ltb->buff)
 205                 return;
 206
 207         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 208             adapter->reset_reason != VNIC_RESET_MOBILITY)
 209                 send_request_unmap(adapter, ltb->map_id);
 210         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 211 }
 212
 213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 214                                 struct ibmvnic_long_term_buff *ltb)
 215 {
 216         memset(ltb->buff, 0, ltb->size);
 217
 218         init_completion(&adapter->fw_done);
 219         send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 220         wait_for_completion(&adapter->fw_done);
 221
 222         if (adapter->fw_done_rc) {
 223                 dev_info(&adapter->vdev->dev,
 224                          "Reset failed, attempting to free and reallocate buffer\n");
 225                 free_long_term_buff(adapter, ltb);
 226                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 227         }
 228         return 0;
 229 }
 230
 231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 232 {
 233         int i;
 234
 235         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 236              i++)
 237                 adapter->rx_pool[i].active = 0;
 238 }
 239
 240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 241                               struct ibmvnic_rx_pool *pool)
 242 {
 243         int count = pool->size - atomic_read(&pool->available);
 244         struct device *dev = &adapter->vdev->dev;
 245         int buffers_added = 0;
 246         unsigned long lpar_rc;
 247         union sub_crq sub_crq;
 248         struct sk_buff *skb;
 249         unsigned int offset;
 250         dma_addr_t dma_addr;
 251         unsigned char *dst;
 252         u64 *handle_array;
 253         int shift = 0;
 254         int index;
 255         int i;
 256
 257         if (!pool->active)
 258                 return;
 259
 260         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 261                                       be32_to_cpu(adapter->login_rsp_buf->
 262                                       off_rxadd_subcrqs));
 263
 264         for (i = 0; i < count; ++i) {
 265                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 266                 if (!skb) {
 267                         dev_err(dev, "Couldn't replenish rx buff\n");
 268                         adapter->replenish_no_mem++;
 269                         break;
 270                 }
 271
 272                 index = pool->free_map[pool->next_free];
 273
 274                 if (pool->rx_buff[index].skb)
 275                         dev_err(dev, "Inconsistent free_map!\n");
 276
 277                 /* Copy the skb to the long term mapped DMA buffer */
 278                 offset = index * pool->buff_size;
 279                 dst = pool->long_term_buff.buff + offset;
 280                 memset(dst, 0, pool->buff_size);
 281                 dma_addr = pool->long_term_buff.addr + offset;
 282                 pool->rx_buff[index].data = dst;
 283
 284                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 285                 pool->rx_buff[index].dma = dma_addr;
 286                 pool->rx_buff[index].skb = skb;
 287                 pool->rx_buff[index].pool_index = pool->index;
 288                 pool->rx_buff[index].size = pool->buff_size;
 289
 290                 memset(&sub_crq, 0, sizeof(sub_crq));
 291                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 292                 sub_crq.rx_add.correlator =
 293                     cpu_to_be64((u64)&pool->rx_buff[index]);
 294                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 295                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 296
 297                 /* The length field of the sCRQ is defined to be 24 bits so the
 298                  * buffer size needs to be left shifted by a byte before it is
 299                  * converted to big endian to prevent the last byte from being
 300                  * truncated.
 301                  */
 302 #ifdef __LITTLE_ENDIAN__
 303                 shift = 8;
 304 #endif
 305                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 306
 307                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 308                                       &sub_crq);
 309                 if (lpar_rc != H_SUCCESS)
 310                         goto failure;
 311
 312                 buffers_added++;
 313                 adapter->replenish_add_buff_success++;
 314                 pool->next_free = (pool->next_free + 1) % pool->size;
 315         }
 316         atomic_add(buffers_added, &pool->available);
 317         return;
 318
 319 failure:
 320         dev_info(dev, "replenish pools failure\n");
 321         pool->free_map[pool->next_free] = index;
 322         pool->rx_buff[index].skb = NULL;
 323         if (!dma_mapping_error(dev, dma_addr))
 324                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 325                                  DMA_FROM_DEVICE);
 326
 327         dev_kfree_skb_any(skb);
 328         adapter->replenish_add_buff_failure++;
 329         atomic_add(buffers_added, &pool->available);
 330
 331         if (lpar_rc == H_CLOSED) {
 332                 /* Disable buffer pool replenishment and report carrier off if
 333                  * queue is closed. Firmware guarantees that a signal will
 334                  * be sent to the driver, triggering a reset.
 335                  */
 336                 deactivate_rx_pools(adapter);
 337                 netif_carrier_off(adapter->netdev);
 338         }
 339 }
 340
 341 static void replenish_pools(struct ibmvnic_adapter *adapter)
 342 {
 343         int i;
 344
 345         adapter->replenish_task_cycles++;
 346         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 347              i++) {
 348                 if (adapter->rx_pool[i].active)
 349                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 350         }
 351 }
 352
 353 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 354 {
 355         kfree(adapter->tx_stats_buffers);
 356         kfree(adapter->rx_stats_buffers);
 357         adapter->tx_stats_buffers = NULL;
 358         adapter->rx_stats_buffers = NULL;
 359 }
 360
 361 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 362 {
 363         adapter->tx_stats_buffers =
 364                                 kcalloc(IBMVNIC_MAX_QUEUES,
 365                                         sizeof(struct ibmvnic_tx_queue_stats),
 366                                         GFP_KERNEL);
 367         if (!adapter->tx_stats_buffers)
 368                 return -ENOMEM;
 369
 370         adapter->rx_stats_buffers =
 371                                 kcalloc(IBMVNIC_MAX_QUEUES,
 372                                         sizeof(struct ibmvnic_rx_queue_stats),
 373                                         GFP_KERNEL);
 374         if (!adapter->rx_stats_buffers)
 375                 return -ENOMEM;
 376
 377         return 0;
 378 }
 379
 380 static void release_stats_token(struct ibmvnic_adapter *adapter)
 381 {
 382         struct device *dev = &adapter->vdev->dev;
 383
 384         if (!adapter->stats_token)
 385                 return;
 386
 387         dma_unmap_single(dev, adapter->stats_token,
 388                          sizeof(struct ibmvnic_statistics),
 389                          DMA_FROM_DEVICE);
 390         adapter->stats_token = 0;
 391 }
 392
 393 static int init_stats_token(struct ibmvnic_adapter *adapter)
 394 {
 395         struct device *dev = &adapter->vdev->dev;
 396         dma_addr_t stok;
 397
 398         stok = dma_map_single(dev, &adapter->stats,
 399                               sizeof(struct ibmvnic_statistics),
 400                               DMA_FROM_DEVICE);
 401         if (dma_mapping_error(dev, stok)) {
 402                 dev_err(dev, "Couldn't map stats buffer\n");
 403                 return -1;
 404         }
 405
 406         adapter->stats_token = stok;
 407         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 408         return 0;
 409 }
 410
 411 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 412 {
 413         struct ibmvnic_rx_pool *rx_pool;
 414         int rx_scrqs;
 415         int i, j, rc;
 416         u64 *size_array;
 417
 418         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 419                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 420
 421         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 422         for (i = 0; i < rx_scrqs; i++) {
 423                 rx_pool = &adapter->rx_pool[i];
 424
 425                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 426
 427                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 428                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 429                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 430                         alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 431                                              rx_pool->size *
 432                                              rx_pool->buff_size);
 433                 } else {
 434                         rc = reset_long_term_buff(adapter,
 435                                                   &rx_pool->long_term_buff);
 436                 }
 437
 438                 if (rc)
 439                         return rc;
 440
 441                 for (j = 0; j < rx_pool->size; j++)
 442                         rx_pool->free_map[j] = j;
 443
 444                 memset(rx_pool->rx_buff, 0,
 445                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 446
 447                 atomic_set(&rx_pool->available, 0);
 448                 rx_pool->next_alloc = 0;
 449                 rx_pool->next_free = 0;
 450                 rx_pool->active = 1;
 451         }
 452
 453         return 0;
 454 }
 455
 456 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 457 {
 458         struct ibmvnic_rx_pool *rx_pool;
 459         int i, j;
 460
 461         if (!adapter->rx_pool)
 462                 return;
 463
 464         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 465                 rx_pool = &adapter->rx_pool[i];
 466
 467                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 468
 469                 kfree(rx_pool->free_map);
 470                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 471
 472                 if (!rx_pool->rx_buff)
 473                         continue;
 474
 475                 for (j = 0; j < rx_pool->size; j++) {
 476                         if (rx_pool->rx_buff[j].skb) {
 477                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 478                                 rx_pool->rx_buff[i].skb = NULL;
 479                         }
 480                 }
 481
 482                 kfree(rx_pool->rx_buff);
 483         }
 484
 485         kfree(adapter->rx_pool);
 486         adapter->rx_pool = NULL;
 487         adapter->num_active_rx_pools = 0;
 488 }
 489
 490 static int init_rx_pools(struct net_device *netdev)
 491 {
 492         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 493         struct device *dev = &adapter->vdev->dev;
 494         struct ibmvnic_rx_pool *rx_pool;
 495         int rxadd_subcrqs;
 496         u64 *size_array;
 497         int i, j;
 498
 499         rxadd_subcrqs =
 500                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 501         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 502                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 503
 504         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 505                                    sizeof(struct ibmvnic_rx_pool),
 506                                    GFP_KERNEL);
 507         if (!adapter->rx_pool) {
 508                 dev_err(dev, "Failed to allocate rx pools\n");
 509                 return -1;
 510         }
 511
 512         adapter->num_active_rx_pools = rxadd_subcrqs;
 513
 514         for (i = 0; i < rxadd_subcrqs; i++) {
 515                 rx_pool = &adapter->rx_pool[i];
 516
 517                 netdev_dbg(adapter->netdev,
 518                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 519                            i, adapter->req_rx_add_entries_per_subcrq,
 520                            be64_to_cpu(size_array[i]));
 521
 522                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 523                 rx_pool->index = i;
 524                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 525                 rx_pool->active = 1;
 526
 527                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 528                                             GFP_KERNEL);
 529                 if (!rx_pool->free_map) {
 530                         release_rx_pools(adapter);
 531                         return -1;
 532                 }
 533
 534                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 535                                            sizeof(struct ibmvnic_rx_buff),
 536                                            GFP_KERNEL);
 537                 if (!rx_pool->rx_buff) {
 538                         dev_err(dev, "Couldn't alloc rx buffers\n");
 539                         release_rx_pools(adapter);
 540                         return -1;
 541                 }
 542
 543                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 544                                          rx_pool->size * rx_pool->buff_size)) {
 545                         release_rx_pools(adapter);
 546                         return -1;
 547                 }
 548
 549                 for (j = 0; j < rx_pool->size; ++j)
 550                         rx_pool->free_map[j] = j;
 551
 552                 atomic_set(&rx_pool->available, 0);
 553                 rx_pool->next_alloc = 0;
 554                 rx_pool->next_free = 0;
 555         }
 556
 557         return 0;
 558 }
 559
 560 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 561 {
 562         struct ibmvnic_tx_pool *tx_pool;
 563         int tx_scrqs;
 564         int i, j, rc;
 565
 566         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 567         for (i = 0; i < tx_scrqs; i++) {
 568                 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
 569
 570                 tx_pool = &adapter->tx_pool[i];
 571
 572                 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 573                 if (rc)
 574                         return rc;
 575
 576                 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
 577                 if (rc)
 578                         return rc;
 579
 580                 memset(tx_pool->tx_buff, 0,
 581                        adapter->req_tx_entries_per_subcrq *
 582                        sizeof(struct ibmvnic_tx_buff));
 583
 584                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 585                         tx_pool->free_map[j] = j;
 586
 587                 tx_pool->consumer_index = 0;
 588                 tx_pool->producer_index = 0;
 589                 tx_pool->tso_index = 0;
 590         }
 591
 592         return 0;
 593 }
 594
 595 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 596 {
 597         if (!adapter->vpd)
 598                 return;
 599
 600         kfree(adapter->vpd->buff);
 601         kfree(adapter->vpd);
 602
 603         adapter->vpd = NULL;
 604 }
 605
 606 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 607 {
 608         struct ibmvnic_tx_pool *tx_pool;
 609         int i;
 610
 611         if (!adapter->tx_pool)
 612                 return;
 613
 614         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 615                 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
 616                 tx_pool = &adapter->tx_pool[i];
 617                 kfree(tx_pool->tx_buff);
 618                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 619                 free_long_term_buff(adapter, &tx_pool->tso_ltb);
 620                 kfree(tx_pool->free_map);
 621         }
 622
 623         kfree(adapter->tx_pool);
 624         adapter->tx_pool = NULL;
 625         adapter->num_active_tx_pools = 0;
 626 }
 627
 628 static int init_tx_pools(struct net_device *netdev)
 629 {
 630         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 631         struct device *dev = &adapter->vdev->dev;
 632         struct ibmvnic_tx_pool *tx_pool;
 633         int tx_subcrqs;
 634         int i, j;
 635
 636         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 637         adapter->tx_pool = kcalloc(tx_subcrqs,
 638                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 639         if (!adapter->tx_pool)
 640                 return -1;
 641
 642         adapter->num_active_tx_pools = tx_subcrqs;
 643
 644         for (i = 0; i < tx_subcrqs; i++) {
 645                 tx_pool = &adapter->tx_pool[i];
 646
 647                 netdev_dbg(adapter->netdev,
 648                            "Initializing tx_pool[%d], %lld buffs\n",
 649                            i, adapter->req_tx_entries_per_subcrq);
 650
 651                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 652                                            sizeof(struct ibmvnic_tx_buff),
 653                                            GFP_KERNEL);
 654                 if (!tx_pool->tx_buff) {
 655                         dev_err(dev, "tx pool buffer allocation failed\n");
 656                         release_tx_pools(adapter);
 657                         return -1;
 658                 }
 659
 660                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 661                                          adapter->req_tx_entries_per_subcrq *
 662                                          adapter->req_mtu)) {
 663                         release_tx_pools(adapter);
 664                         return -1;
 665                 }
 666
 667                 /* alloc TSO ltb */
 668                 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
 669                                          IBMVNIC_TSO_BUFS *
 670                                          IBMVNIC_TSO_BUF_SZ)) {
 671                         release_tx_pools(adapter);
 672                         return -1;
 673                 }
 674
 675                 tx_pool->tso_index = 0;
 676
 677                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 678                                             sizeof(int), GFP_KERNEL);
 679                 if (!tx_pool->free_map) {
 680                         release_tx_pools(adapter);
 681                         return -1;
 682                 }
 683
 684                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 685                         tx_pool->free_map[j] = j;
 686
 687                 tx_pool->consumer_index = 0;
 688                 tx_pool->producer_index = 0;
 689         }
 690
 691         return 0;
 692 }
 693
 694 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 695 {
 696         struct device *dev = &adapter->vdev->dev;
 697         struct ibmvnic_error_buff *error_buff, *tmp;
 698         unsigned long flags;
 699
 700         spin_lock_irqsave(&adapter->error_list_lock, flags);
 701         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 702                 list_del(&error_buff->list);
 703                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 704                                  DMA_FROM_DEVICE);
 705                 kfree(error_buff->buff);
 706                 kfree(error_buff);
 707         }
 708         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 709 }
 710
 711 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 712 {
 713         int i;
 714
 715         if (adapter->napi_enabled)
 716                 return;
 717
 718         for (i = 0; i < adapter->req_rx_queues; i++)
 719                 napi_enable(&adapter->napi[i]);
 720
 721         adapter->napi_enabled = true;
 722 }
 723
 724 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 725 {
 726         int i;
 727
 728         if (!adapter->napi_enabled)
 729                 return;
 730
 731         for (i = 0; i < adapter->req_rx_queues; i++) {
 732                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 733                 napi_disable(&adapter->napi[i]);
 734         }
 735
 736         adapter->napi_enabled = false;
 737 }
 738
 739 static int init_napi(struct ibmvnic_adapter *adapter)
 740 {
 741         int i;
 742
 743         adapter->napi = kcalloc(adapter->req_rx_queues,
 744                                 sizeof(struct napi_struct), GFP_KERNEL);
 745         if (!adapter->napi)
 746                 return -ENOMEM;
 747
 748         for (i = 0; i < adapter->req_rx_queues; i++) {
 749                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 750                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 751                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 752         }
 753
 754         adapter->num_active_rx_napi = adapter->req_rx_queues;
 755         return 0;
 756 }
 757
 758 static void release_napi(struct ibmvnic_adapter *adapter)
 759 {
 760         int i;
 761
 762         if (!adapter->napi)
 763                 return;
 764
 765         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 766                 if (&adapter->napi[i]) {
 767                         netdev_dbg(adapter->netdev,
 768                                    "Releasing napi[%d]\n", i);
 769                         netif_napi_del(&adapter->napi[i]);
 770                 }
 771         }
 772
 773         kfree(adapter->napi);
 774         adapter->napi = NULL;
 775         adapter->num_active_rx_napi = 0;
 776 }
 777
 778 static int ibmvnic_login(struct net_device *netdev)
 779 {
 780         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 781         unsigned long timeout = msecs_to_jiffies(30000);
 782         struct device *dev = &adapter->vdev->dev;
 783         int rc;
 784
 785         do {
 786                 if (adapter->renegotiate) {
 787                         adapter->renegotiate = false;
 788                         release_sub_crqs(adapter, 1);
 789
 790                         reinit_completion(&adapter->init_done);
 791                         send_cap_queries(adapter);
 792                         if (!wait_for_completion_timeout(&adapter->init_done,
 793                                                          timeout)) {
 794                                 dev_err(dev, "Capabilities query timeout\n");
 795                                 return -1;
 796                         }
 797                         rc = init_sub_crqs(adapter);
 798                         if (rc) {
 799                                 dev_err(dev,
 800                                         "Initialization of SCRQ's failed\n");
 801                                 return -1;
 802                         }
 803                         rc = init_sub_crq_irqs(adapter);
 804                         if (rc) {
 805                                 dev_err(dev,
 806                                         "Initialization of SCRQ's irqs failed\n");
 807                                 return -1;
 808                         }
 809                 }
 810
 811                 reinit_completion(&adapter->init_done);
 812                 send_login(adapter);
 813                 if (!wait_for_completion_timeout(&adapter->init_done,
 814                                                  timeout)) {
 815                         dev_err(dev, "Login timeout\n");
 816                         return -1;
 817                 }
 818         } while (adapter->renegotiate);
 819
 820         /* handle pending MAC address changes after successful login */
 821         if (adapter->mac_change_pending) {
 822                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 823                 adapter->mac_change_pending = false;
 824         }
 825
 826         return 0;
 827 }
 828
 829 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 830 {
 831         kfree(adapter->login_buf);
 832         adapter->login_buf = NULL;
 833 }
 834
 835 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 836 {
 837         kfree(adapter->login_rsp_buf);
 838         adapter->login_rsp_buf = NULL;
 839 }
 840
 841 static void release_resources(struct ibmvnic_adapter *adapter)
 842 {
 843         release_vpd_data(adapter);
 844
 845         release_tx_pools(adapter);
 846         release_rx_pools(adapter);
 847
 848         release_stats_token(adapter);
 849         release_stats_buffers(adapter);
 850         release_error_buffers(adapter);
 851         release_napi(adapter);
 852         release_login_rsp_buffer(adapter);
 853 }
 854
 855 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 856 {
 857         struct net_device *netdev = adapter->netdev;
 858         unsigned long timeout = msecs_to_jiffies(30000);
 859         union ibmvnic_crq crq;
 860         bool resend;
 861         int rc;
 862
 863         netdev_dbg(netdev, "setting link state %d\n", link_state);
 864
 865         memset(&crq, 0, sizeof(crq));
 866         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 867         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 868         crq.logical_link_state.link_state = link_state;
 869
 870         do {
 871                 resend = false;
 872
 873                 reinit_completion(&adapter->init_done);
 874                 rc = ibmvnic_send_crq(adapter, &crq);
 875                 if (rc) {
 876                         netdev_err(netdev, "Failed to set link state\n");
 877                         return rc;
 878                 }
 879
 880                 if (!wait_for_completion_timeout(&adapter->init_done,
 881                                                  timeout)) {
 882                         netdev_err(netdev, "timeout setting link state\n");
 883                         return -1;
 884                 }
 885
 886                 if (adapter->init_done_rc == 1) {
 887                         /* Partuial success, delay and re-send */
 888                         mdelay(1000);
 889                         resend = true;
 890                 }
 891         } while (resend);
 892
 893         return 0;
 894 }
 895
 896 static int set_real_num_queues(struct net_device *netdev)
 897 {
 898         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 899         int rc;
 900
 901         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 902                    adapter->req_tx_queues, adapter->req_rx_queues);
 903
 904         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 905         if (rc) {
 906                 netdev_err(netdev, "failed to set the number of tx queues\n");
 907                 return rc;
 908         }
 909
 910         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 911         if (rc)
 912                 netdev_err(netdev, "failed to set the number of rx queues\n");
 913
 914         return rc;
 915 }
 916
 917 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 918 {
 919         struct device *dev = &adapter->vdev->dev;
 920         union ibmvnic_crq crq;
 921         int len = 0;
 922
 923         if (adapter->vpd->buff)
 924                 len = adapter->vpd->len;
 925
 926         init_completion(&adapter->fw_done);
 927         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 928         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 929         ibmvnic_send_crq(adapter, &crq);
 930         wait_for_completion(&adapter->fw_done);
 931
 932         if (!adapter->vpd->len)
 933                 return -ENODATA;
 934
 935         if (!adapter->vpd->buff)
 936                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 937         else if (adapter->vpd->len != len)
 938                 adapter->vpd->buff =
 939                         krealloc(adapter->vpd->buff,
 940                                  adapter->vpd->len, GFP_KERNEL);
 941
 942         if (!adapter->vpd->buff) {
 943                 dev_err(dev, "Could allocate VPD buffer\n");
 944                 return -ENOMEM;
 945         }
 946
 947         adapter->vpd->dma_addr =
 948                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 949                                DMA_FROM_DEVICE);
 950         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 951                 dev_err(dev, "Could not map VPD buffer\n");
 952                 kfree(adapter->vpd->buff);
 953                 adapter->vpd->buff = NULL;
 954                 return -ENOMEM;
 955         }
 956
 957         reinit_completion(&adapter->fw_done);
 958         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 959         crq.get_vpd.cmd = GET_VPD;
 960         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 961         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
 962         ibmvnic_send_crq(adapter, &crq);
 963         wait_for_completion(&adapter->fw_done);
 964
 965         return 0;
 966 }
 967
 968 static int init_resources(struct ibmvnic_adapter *adapter)
 969 {
 970         struct net_device *netdev = adapter->netdev;
 971         int rc;
 972
 973         rc = set_real_num_queues(netdev);
 974         if (rc)
 975                 return rc;
 976
 977         rc = init_stats_buffers(adapter);
 978         if (rc)
 979                 return rc;
 980
 981         rc = init_stats_token(adapter);
 982         if (rc)
 983                 return rc;
 984
 985         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
 986         if (!adapter->vpd)
 987                 return -ENOMEM;
 988
 989         /* Vital Product Data (VPD) */
 990         rc = ibmvnic_get_vpd(adapter);
 991         if (rc) {
 992                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
 993                 return rc;
 994         }
 995
 996         adapter->map_id = 1;
 997
 998         rc = init_napi(adapter);
 999         if (rc)
1000                 return rc;
1001
1002         send_map_query(adapter);
1003
1004         rc = init_rx_pools(netdev);
1005         if (rc)
1006                 return rc;
1007
1008         rc = init_tx_pools(netdev);
1009         return rc;
1010 }
1011
1012 static int __ibmvnic_open(struct net_device *netdev)
1013 {
1014         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1015         enum vnic_state prev_state = adapter->state;
1016         int i, rc;
1017
1018         adapter->state = VNIC_OPENING;
1019         replenish_pools(adapter);
1020         ibmvnic_napi_enable(adapter);
1021
1022         /* We're ready to receive frames, enable the sub-crq interrupts and
1023          * set the logical link state to up
1024          */
1025         for (i = 0; i < adapter->req_rx_queues; i++) {
1026                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1027                 if (prev_state == VNIC_CLOSED)
1028                         enable_irq(adapter->rx_scrq[i]->irq);
1029                 else
1030                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1031         }
1032
1033         for (i = 0; i < adapter->req_tx_queues; i++) {
1034                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1035                 if (prev_state == VNIC_CLOSED)
1036                         enable_irq(adapter->tx_scrq[i]->irq);
1037                 else
1038                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1039         }
1040
1041         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1042         if (rc) {
1043                 for (i = 0; i < adapter->req_rx_queues; i++)
1044                         napi_disable(&adapter->napi[i]);
1045                 release_resources(adapter);
1046                 return rc;
1047         }
1048
1049         netif_tx_start_all_queues(netdev);
1050
1051         if (prev_state == VNIC_CLOSED) {
1052                 for (i = 0; i < adapter->req_rx_queues; i++)
1053                         napi_schedule(&adapter->napi[i]);
1054         }
1055
1056         adapter->state = VNIC_OPEN;
1057         return rc;
1058 }
1059
1060 static int ibmvnic_open(struct net_device *netdev)
1061 {
1062         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1063         int rc;
1064
1065         mutex_lock(&adapter->reset_lock);
1066
1067         if (adapter->state != VNIC_CLOSED) {
1068                 rc = ibmvnic_login(netdev);
1069                 if (rc) {
1070                         mutex_unlock(&adapter->reset_lock);
1071                         return rc;
1072                 }
1073
1074                 rc = init_resources(adapter);
1075                 if (rc) {
1076                         netdev_err(netdev, "failed to initialize resources\n");
1077                         release_resources(adapter);
1078                         mutex_unlock(&adapter->reset_lock);
1079                         return rc;
1080                 }
1081         }
1082
1083         rc = __ibmvnic_open(netdev);
1084         netif_carrier_on(netdev);
1085
1086         mutex_unlock(&adapter->reset_lock);
1087
1088         return rc;
1089 }
1090
1091 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1092 {
1093         struct ibmvnic_rx_pool *rx_pool;
1094         u64 rx_entries;
1095         int rx_scrqs;
1096         int i, j;
1097
1098         if (!adapter->rx_pool)
1099                 return;
1100
1101         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
1102         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1103
1104         /* Free any remaining skbs in the rx buffer pools */
1105         for (i = 0; i < rx_scrqs; i++) {
1106                 rx_pool = &adapter->rx_pool[i];
1107                 if (!rx_pool)
1108                         continue;
1109
1110                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1111                 for (j = 0; j < rx_entries; j++) {
1112                         if (rx_pool->rx_buff[j].skb) {
1113                                 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
1114                                 rx_pool->rx_buff[j].skb = NULL;
1115                         }
1116                 }
1117         }
1118 }
1119
1120 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1121 {
1122         struct ibmvnic_tx_pool *tx_pool;
1123         u64 tx_entries;
1124         int tx_scrqs;
1125         int i, j;
1126
1127         if (!adapter->tx_pool)
1128                 return;
1129
1130         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1131         tx_entries = adapter->req_tx_entries_per_subcrq;
1132
1133         /* Free any remaining skbs in the tx buffer pools */
1134         for (i = 0; i < tx_scrqs; i++) {
1135                 tx_pool = &adapter->tx_pool[i];
1136                 if (!tx_pool)
1137                         continue;
1138
1139                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1140                 for (j = 0; j < tx_entries; j++) {
1141                         if (tx_pool->tx_buff[j].skb) {
1142                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1143                                 tx_pool->tx_buff[j].skb = NULL;
1144                         }
1145                 }
1146         }
1147 }
1148
1149 static int __ibmvnic_close(struct net_device *netdev)
1150 {
1151         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1152         int rc = 0;
1153         int i;
1154
1155         adapter->state = VNIC_CLOSING;
1156
1157         /* ensure that transmissions are stopped if called by do_reset */
1158         if (adapter->resetting)
1159                 netif_tx_disable(netdev);
1160         else
1161                 netif_tx_stop_all_queues(netdev);
1162
1163         ibmvnic_napi_disable(adapter);
1164
1165         if (adapter->tx_scrq) {
1166                 for (i = 0; i < adapter->req_tx_queues; i++)
1167                         if (adapter->tx_scrq[i]->irq) {
1168                                 netdev_dbg(adapter->netdev,
1169                                            "Disabling tx_scrq[%d] irq\n", i);
1170                                 disable_irq(adapter->tx_scrq[i]->irq);
1171                         }
1172         }
1173
1174         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1175         if (rc)
1176                 return rc;
1177
1178         if (adapter->rx_scrq) {
1179                 for (i = 0; i < adapter->req_rx_queues; i++) {
1180                         int retries = 10;
1181
1182                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1183                                 retries--;
1184                                 mdelay(100);
1185
1186                                 if (retries == 0)
1187                                         break;
1188                         }
1189
1190                         if (adapter->rx_scrq[i]->irq) {
1191                                 netdev_dbg(adapter->netdev,
1192                                            "Disabling rx_scrq[%d] irq\n", i);
1193                                 disable_irq(adapter->rx_scrq[i]->irq);
1194                         }
1195                 }
1196         }
1197         clean_rx_pools(adapter);
1198         clean_tx_pools(adapter);
1199         adapter->state = VNIC_CLOSED;
1200         return rc;
1201 }
1202
1203 static int ibmvnic_close(struct net_device *netdev)
1204 {
1205         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1206         int rc;
1207
1208         mutex_lock(&adapter->reset_lock);
1209         rc = __ibmvnic_close(netdev);
1210         mutex_unlock(&adapter->reset_lock);
1211
1212         return rc;
1213 }
1214
1215 /**
1216  * build_hdr_data - creates L2/L3/L4 header data buffer
1217  * @hdr_field - bitfield determining needed headers
1218  * @skb - socket buffer
1219  * @hdr_len - array of header lengths
1220  * @tot_len - total length of data
1221  *
1222  * Reads hdr_field to determine which headers are needed by firmware.
1223  * Builds a buffer containing these headers.  Saves individual header
1224  * lengths and total buffer length to be used to build descriptors.
1225  */
1226 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1227                           int *hdr_len, u8 *hdr_data)
1228 {
1229         int len = 0;
1230         u8 *hdr;
1231
1232         hdr_len[0] = sizeof(struct ethhdr);
1233
1234         if (skb->protocol == htons(ETH_P_IP)) {
1235                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1236                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1237                         hdr_len[2] = tcp_hdrlen(skb);
1238                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1239                         hdr_len[2] = sizeof(struct udphdr);
1240         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1241                 hdr_len[1] = sizeof(struct ipv6hdr);
1242                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1243                         hdr_len[2] = tcp_hdrlen(skb);
1244                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1245                         hdr_len[2] = sizeof(struct udphdr);
1246         } else if (skb->protocol == htons(ETH_P_ARP)) {
1247                 hdr_len[1] = arp_hdr_len(skb->dev);
1248                 hdr_len[2] = 0;
1249         }
1250
1251         memset(hdr_data, 0, 120);
1252         if ((hdr_field >> 6) & 1) {
1253                 hdr = skb_mac_header(skb);
1254                 memcpy(hdr_data, hdr, hdr_len[0]);
1255                 len += hdr_len[0];
1256         }
1257
1258         if ((hdr_field >> 5) & 1) {
1259                 hdr = skb_network_header(skb);
1260                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1261                 len += hdr_len[1];
1262         }
1263
1264         if ((hdr_field >> 4) & 1) {
1265                 hdr = skb_transport_header(skb);
1266                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1267                 len += hdr_len[2];
1268         }
1269         return len;
1270 }
1271
1272 /**
1273  * create_hdr_descs - create header and header extension descriptors
1274  * @hdr_field - bitfield determining needed headers
1275  * @data - buffer containing header data
1276  * @len - length of data buffer
1277  * @hdr_len - array of individual header lengths
1278  * @scrq_arr - descriptor array
1279  *
1280  * Creates header and, if needed, header extension descriptors and
1281  * places them in a descriptor array, scrq_arr
1282  */
1283
1284 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1285                             union sub_crq *scrq_arr)
1286 {
1287         union sub_crq hdr_desc;
1288         int tmp_len = len;
1289         int num_descs = 0;
1290         u8 *data, *cur;
1291         int tmp;
1292
1293         while (tmp_len > 0) {
1294                 cur = hdr_data + len - tmp_len;
1295
1296                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1297                 if (cur != hdr_data) {
1298                         data = hdr_desc.hdr_ext.data;
1299                         tmp = tmp_len > 29 ? 29 : tmp_len;
1300                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1301                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1302                         hdr_desc.hdr_ext.len = tmp;
1303                 } else {
1304                         data = hdr_desc.hdr.data;
1305                         tmp = tmp_len > 24 ? 24 : tmp_len;
1306                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1307                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1308                         hdr_desc.hdr.len = tmp;
1309                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1310                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1311                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1312                         hdr_desc.hdr.flag = hdr_field << 1;
1313                 }
1314                 memcpy(data, cur, tmp);
1315                 tmp_len -= tmp;
1316                 *scrq_arr = hdr_desc;
1317                 scrq_arr++;
1318                 num_descs++;
1319         }
1320
1321         return num_descs;
1322 }
1323
1324 /**
1325  * build_hdr_descs_arr - build a header descriptor array
1326  * @skb - socket buffer
1327  * @num_entries - number of descriptors to be sent
1328  * @subcrq - first TX descriptor
1329  * @hdr_field - bit field determining which headers will be sent
1330  *
1331  * This function will build a TX descriptor array with applicable
1332  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1333  */
1334
1335 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1336                                 int *num_entries, u8 hdr_field)
1337 {
1338         int hdr_len[3] = {0, 0, 0};
1339         int tot_len;
1340         u8 *hdr_data = txbuff->hdr_data;
1341
1342         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1343                                  txbuff->hdr_data);
1344         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1345                          txbuff->indir_arr + 1);
1346 }
1347
1348 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1349 {
1350         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1351         int queue_num = skb_get_queue_mapping(skb);
1352         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1353         struct device *dev = &adapter->vdev->dev;
1354         struct ibmvnic_tx_buff *tx_buff = NULL;
1355         struct ibmvnic_sub_crq_queue *tx_scrq;
1356         struct ibmvnic_tx_pool *tx_pool;
1357         unsigned int tx_send_failed = 0;
1358         unsigned int tx_map_failed = 0;
1359         unsigned int tx_dropped = 0;
1360         unsigned int tx_packets = 0;
1361         unsigned int tx_bytes = 0;
1362         dma_addr_t data_dma_addr;
1363         struct netdev_queue *txq;
1364         unsigned long lpar_rc;
1365         union sub_crq tx_crq;
1366         unsigned int offset;
1367         int num_entries = 1;
1368         unsigned char *dst;
1369         u64 *handle_array;
1370         int index = 0;
1371         u8 proto = 0;
1372         int ret = 0;
1373
1374         if (adapter->resetting) {
1375                 if (!netif_subqueue_stopped(netdev, skb))
1376                         netif_stop_subqueue(netdev, queue_num);
1377                 dev_kfree_skb_any(skb);
1378
1379                 tx_send_failed++;
1380                 tx_dropped++;
1381                 ret = NETDEV_TX_OK;
1382                 goto out;
1383         }
1384
1385         tx_pool = &adapter->tx_pool[queue_num];
1386         tx_scrq = adapter->tx_scrq[queue_num];
1387         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1388         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1389                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1390
1391         index = tx_pool->free_map[tx_pool->consumer_index];
1392
1393         if (skb_is_gso(skb)) {
1394                 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1395                 dst = tx_pool->tso_ltb.buff + offset;
1396                 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1397                 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1398                 tx_pool->tso_index++;
1399                 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1400                         tx_pool->tso_index = 0;
1401         } else {
1402                 offset = index * adapter->req_mtu;
1403                 dst = tx_pool->long_term_buff.buff + offset;
1404                 memset(dst, 0, adapter->req_mtu);
1405                 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1406         }
1407
1408         if (skb_shinfo(skb)->nr_frags) {
1409                 int cur, i;
1410
1411                 /* Copy the head */
1412                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1413                 cur = skb_headlen(skb);
1414
1415                 /* Copy the frags */
1416                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1417                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1418
1419                         memcpy(dst + cur,
1420                                page_address(skb_frag_page(frag)) +
1421                                frag->page_offset, skb_frag_size(frag));
1422                         cur += skb_frag_size(frag);
1423                 }
1424         } else {
1425                 skb_copy_from_linear_data(skb, dst, skb->len);
1426         }
1427
1428         tx_pool->consumer_index =
1429             (tx_pool->consumer_index + 1) %
1430                 adapter->req_tx_entries_per_subcrq;
1431
1432         tx_buff = &tx_pool->tx_buff[index];
1433         tx_buff->skb = skb;
1434         tx_buff->data_dma[0] = data_dma_addr;
1435         tx_buff->data_len[0] = skb->len;
1436         tx_buff->index = index;
1437         tx_buff->pool_index = queue_num;
1438         tx_buff->last_frag = true;
1439
1440         memset(&tx_crq, 0, sizeof(tx_crq));
1441         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1442         tx_crq.v1.type = IBMVNIC_TX_DESC;
1443         tx_crq.v1.n_crq_elem = 1;
1444         tx_crq.v1.n_sge = 1;
1445         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1446         tx_crq.v1.correlator = cpu_to_be32(index);
1447         if (skb_is_gso(skb))
1448                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1449         else
1450                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1451         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1452         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1453
1454         if (adapter->vlan_header_insertion) {
1455                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1456                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1457         }
1458
1459         if (skb->protocol == htons(ETH_P_IP)) {
1460                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1461                 proto = ip_hdr(skb)->protocol;
1462         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1463                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1464                 proto = ipv6_hdr(skb)->nexthdr;
1465         }
1466
1467         if (proto == IPPROTO_TCP)
1468                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1469         else if (proto == IPPROTO_UDP)
1470                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1471
1472         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1473                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1474                 hdrs += 2;
1475         }
1476         if (skb_is_gso(skb)) {
1477                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1478                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1479                 hdrs += 2;
1480         }
1481         /* determine if l2/3/4 headers are sent to firmware */
1482         if ((*hdrs >> 7) & 1) {
1483                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1484                 tx_crq.v1.n_crq_elem = num_entries;
1485                 tx_buff->indir_arr[0] = tx_crq;
1486                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1487                                                     sizeof(tx_buff->indir_arr),
1488                                                     DMA_TO_DEVICE);
1489                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1490                         dev_kfree_skb_any(skb);
1491                         tx_buff->skb = NULL;
1492                         if (!firmware_has_feature(FW_FEATURE_CMO))
1493                                 dev_err(dev, "tx: unable to map descriptor array\n");
1494                         tx_map_failed++;
1495                         tx_dropped++;
1496                         ret = NETDEV_TX_OK;
1497                         goto out;
1498                 }
1499                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1500                                                (u64)tx_buff->indir_dma,
1501                                                (u64)num_entries);
1502         } else {
1503                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1504                                       &tx_crq);
1505         }
1506         if (lpar_rc != H_SUCCESS) {
1507                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1508
1509                 if (tx_pool->consumer_index == 0)
1510                         tx_pool->consumer_index =
1511                                 adapter->req_tx_entries_per_subcrq - 1;
1512                 else
1513                         tx_pool->consumer_index--;
1514
1515                 dev_kfree_skb_any(skb);
1516                 tx_buff->skb = NULL;
1517
1518                 if (lpar_rc == H_CLOSED) {
1519                         /* Disable TX and report carrier off if queue is closed.
1520                          * Firmware guarantees that a signal will be sent to the
1521                          * driver, triggering a reset or some other action.
1522                          */
1523                         netif_tx_stop_all_queues(netdev);
1524                         netif_carrier_off(netdev);
1525                 }
1526
1527                 tx_send_failed++;
1528                 tx_dropped++;
1529                 ret = NETDEV_TX_OK;
1530                 goto out;
1531         }
1532
1533         if (atomic_add_return(num_entries, &tx_scrq->used)
1534                                         >= adapter->req_tx_entries_per_subcrq) {
1535                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1536                 netif_stop_subqueue(netdev, queue_num);
1537         }
1538
1539         tx_buff->num_entries = num_entries;
1540         tx_packets++;
1541         tx_bytes += skb->len;
1542         txq->trans_start = jiffies;
1543         ret = NETDEV_TX_OK;
1544
1545 out:
1546         netdev->stats.tx_dropped += tx_dropped;
1547         netdev->stats.tx_bytes += tx_bytes;
1548         netdev->stats.tx_packets += tx_packets;
1549         adapter->tx_send_failed += tx_send_failed;
1550         adapter->tx_map_failed += tx_map_failed;
1551         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1552         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1553         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1554
1555         return ret;
1556 }
1557
1558 static void ibmvnic_set_multi(struct net_device *netdev)
1559 {
1560         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1561         struct netdev_hw_addr *ha;
1562         union ibmvnic_crq crq;
1563
1564         memset(&crq, 0, sizeof(crq));
1565         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1566         crq.request_capability.cmd = REQUEST_CAPABILITY;
1567
1568         if (netdev->flags & IFF_PROMISC) {
1569                 if (!adapter->promisc_supported)
1570                         return;
1571         } else {
1572                 if (netdev->flags & IFF_ALLMULTI) {
1573                         /* Accept all multicast */
1574                         memset(&crq, 0, sizeof(crq));
1575                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1576                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1577                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1578                         ibmvnic_send_crq(adapter, &crq);
1579                 } else if (netdev_mc_empty(netdev)) {
1580                         /* Reject all multicast */
1581                         memset(&crq, 0, sizeof(crq));
1582                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1583                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1584                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1585                         ibmvnic_send_crq(adapter, &crq);
1586                 } else {
1587                         /* Accept one or more multicast(s) */
1588                         netdev_for_each_mc_addr(ha, netdev) {
1589                                 memset(&crq, 0, sizeof(crq));
1590                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1591                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1592                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1593                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1594                                                 ha->addr);
1595                                 ibmvnic_send_crq(adapter, &crq);
1596                         }
1597                 }
1598         }
1599 }
1600
1601 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1602 {
1603         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1604         struct sockaddr *addr = p;
1605         union ibmvnic_crq crq;
1606
1607         if (!is_valid_ether_addr(addr->sa_data))
1608                 return -EADDRNOTAVAIL;
1609
1610         memset(&crq, 0, sizeof(crq));
1611         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1612         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1613         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1614
1615         init_completion(&adapter->fw_done);
1616         ibmvnic_send_crq(adapter, &crq);
1617         wait_for_completion(&adapter->fw_done);
1618         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1619         return adapter->fw_done_rc ? -EIO : 0;
1620 }
1621
1622 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1623 {
1624         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1625         struct sockaddr *addr = p;
1626         int rc;
1627
1628         if (adapter->state == VNIC_PROBED) {
1629                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1630                 adapter->mac_change_pending = true;
1631                 return 0;
1632         }
1633
1634         rc = __ibmvnic_set_mac(netdev, addr);
1635
1636         return rc;
1637 }
1638
1639 /**
1640  * do_reset returns zero if we are able to keep processing reset events, or
1641  * non-zero if we hit a fatal error and must halt.
1642  */
1643 static int do_reset(struct ibmvnic_adapter *adapter,
1644                     struct ibmvnic_rwi *rwi, u32 reset_state)
1645 {
1646         u64 old_num_rx_queues, old_num_tx_queues;
1647         struct net_device *netdev = adapter->netdev;
1648         int i, rc;
1649
1650         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1651                    rwi->reset_reason);
1652
1653         netif_carrier_off(netdev);
1654         adapter->reset_reason = rwi->reset_reason;
1655
1656         old_num_rx_queues = adapter->req_rx_queues;
1657         old_num_tx_queues = adapter->req_tx_queues;
1658
1659         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1660                 rc = ibmvnic_reenable_crq_queue(adapter);
1661                 if (rc)
1662                         return 0;
1663         }
1664
1665         rc = __ibmvnic_close(netdev);
1666         if (rc)
1667                 return rc;
1668
1669         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1670             adapter->wait_for_reset) {
1671                 release_resources(adapter);
1672                 release_sub_crqs(adapter, 1);
1673                 release_crq_queue(adapter);
1674         }
1675
1676         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1677                 /* remove the closed state so when we call open it appears
1678                  * we are coming from the probed state.
1679                  */
1680                 adapter->state = VNIC_PROBED;
1681
1682                 rc = ibmvnic_init(adapter);
1683                 if (rc)
1684                         return IBMVNIC_INIT_FAILED;
1685
1686                 /* If the adapter was in PROBE state prior to the reset,
1687                  * exit here.
1688                  */
1689                 if (reset_state == VNIC_PROBED)
1690                         return 0;
1691
1692                 rc = ibmvnic_login(netdev);
1693                 if (rc) {
1694                         adapter->state = VNIC_PROBED;
1695                         return 0;
1696                 }
1697
1698                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1699                     adapter->wait_for_reset) {
1700                         rc = init_resources(adapter);
1701                         if (rc)
1702                                 return rc;
1703                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1704                            adapter->req_tx_queues != old_num_tx_queues) {
1705                         adapter->map_id = 1;
1706                         release_rx_pools(adapter);
1707                         release_tx_pools(adapter);
1708                         init_rx_pools(netdev);
1709                         init_tx_pools(netdev);
1710
1711                         release_napi(adapter);
1712                         init_napi(adapter);
1713                 } else {
1714                         rc = reset_tx_pools(adapter);
1715                         if (rc)
1716                                 return rc;
1717
1718                         rc = reset_rx_pools(adapter);
1719                         if (rc)
1720                                 return rc;
1721
1722                         if (reset_state == VNIC_CLOSED)
1723                                 return 0;
1724                 }
1725         }
1726
1727         rc = __ibmvnic_open(netdev);
1728         if (rc) {
1729                 if (list_empty(&adapter->rwi_list))
1730                         adapter->state = VNIC_CLOSED;
1731                 else
1732                         adapter->state = reset_state;
1733
1734                 return 0;
1735         }
1736
1737         /* kick napi */
1738         for (i = 0; i < adapter->req_rx_queues; i++)
1739                 napi_schedule(&adapter->napi[i]);
1740
1741         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1742                 netdev_notify_peers(netdev);
1743
1744         netif_carrier_on(netdev);
1745
1746         return 0;
1747 }
1748
1749 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1750 {
1751         struct ibmvnic_rwi *rwi;
1752
1753         mutex_lock(&adapter->rwi_lock);
1754
1755         if (!list_empty(&adapter->rwi_list)) {
1756                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1757                                        list);
1758                 list_del(&rwi->list);
1759         } else {
1760                 rwi = NULL;
1761         }
1762
1763         mutex_unlock(&adapter->rwi_lock);
1764         return rwi;
1765 }
1766
1767 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1768 {
1769         struct ibmvnic_rwi *rwi;
1770
1771         rwi = get_next_rwi(adapter);
1772         while (rwi) {
1773                 kfree(rwi);
1774                 rwi = get_next_rwi(adapter);
1775         }
1776 }
1777
1778 static void __ibmvnic_reset(struct work_struct *work)
1779 {
1780         struct ibmvnic_rwi *rwi;
1781         struct ibmvnic_adapter *adapter;
1782         struct net_device *netdev;
1783         u32 reset_state;
1784         int rc = 0;
1785
1786         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1787         netdev = adapter->netdev;
1788
1789         mutex_lock(&adapter->reset_lock);
1790         adapter->resetting = true;
1791         reset_state = adapter->state;
1792
1793         rwi = get_next_rwi(adapter);
1794         while (rwi) {
1795                 rc = do_reset(adapter, rwi, reset_state);
1796                 kfree(rwi);
1797                 if (rc && rc != IBMVNIC_INIT_FAILED)
1798                         break;
1799
1800                 rwi = get_next_rwi(adapter);
1801         }
1802
1803         if (adapter->wait_for_reset) {
1804                 adapter->wait_for_reset = false;
1805                 adapter->reset_done_rc = rc;
1806                 complete(&adapter->reset_done);
1807         }
1808
1809         if (rc) {
1810                 netdev_dbg(adapter->netdev, "Reset failed\n");
1811                 free_all_rwi(adapter);
1812                 mutex_unlock(&adapter->reset_lock);
1813                 return;
1814         }
1815
1816         adapter->resetting = false;
1817         mutex_unlock(&adapter->reset_lock);
1818 }
1819
1820 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1821                           enum ibmvnic_reset_reason reason)
1822 {
1823         struct ibmvnic_rwi *rwi, *tmp;
1824         struct net_device *netdev = adapter->netdev;
1825         struct list_head *entry;
1826
1827         if (adapter->state == VNIC_REMOVING ||
1828             adapter->state == VNIC_REMOVED) {
1829                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1830                 return;
1831         }
1832
1833         if (adapter->state == VNIC_PROBING) {
1834                 netdev_warn(netdev, "Adapter reset during probe\n");
1835                 adapter->init_done_rc = EAGAIN;
1836                 return;
1837         }
1838
1839         mutex_lock(&adapter->rwi_lock);
1840
1841         list_for_each(entry, &adapter->rwi_list) {
1842                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1843                 if (tmp->reset_reason == reason) {
1844                         netdev_dbg(netdev, "Skipping matching reset\n");
1845                         mutex_unlock(&adapter->rwi_lock);
1846                         return;
1847                 }
1848         }
1849
1850         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1851         if (!rwi) {
1852                 mutex_unlock(&adapter->rwi_lock);
1853                 ibmvnic_close(netdev);
1854                 return;
1855         }
1856
1857         rwi->reset_reason = reason;
1858         list_add_tail(&rwi->list, &adapter->rwi_list);
1859         mutex_unlock(&adapter->rwi_lock);
1860
1861         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1862         schedule_work(&adapter->ibmvnic_reset);
1863 }
1864
1865 static void ibmvnic_tx_timeout(struct net_device *dev)
1866 {
1867         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1868
1869         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1870 }
1871
1872 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1873                                   struct ibmvnic_rx_buff *rx_buff)
1874 {
1875         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1876
1877         rx_buff->skb = NULL;
1878
1879         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1880         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1881
1882         atomic_dec(&pool->available);
1883 }
1884
1885 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1886 {
1887         struct net_device *netdev = napi->dev;
1888         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1889         int scrq_num = (int)(napi - adapter->napi);
1890         int frames_processed = 0;
1891
1892 restart_poll:
1893         while (frames_processed < budget) {
1894                 struct sk_buff *skb;
1895                 struct ibmvnic_rx_buff *rx_buff;
1896                 union sub_crq *next;
1897                 u32 length;
1898                 u16 offset;
1899                 u8 flags = 0;
1900
1901                 if (unlikely(adapter->resetting &&
1902                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1903                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1904                         napi_complete_done(napi, frames_processed);
1905                         return frames_processed;
1906                 }
1907
1908                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1909                         break;
1910                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1911                 rx_buff =
1912                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1913                                                           rx_comp.correlator);
1914                 /* do error checking */
1915                 if (next->rx_comp.rc) {
1916                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1917                                    be16_to_cpu(next->rx_comp.rc));
1918                         /* free the entry */
1919                         next->rx_comp.first = 0;
1920                         dev_kfree_skb_any(rx_buff->skb);
1921                         remove_buff_from_pool(adapter, rx_buff);
1922                         continue;
1923                 } else if (!rx_buff->skb) {
1924                         /* free the entry */
1925                         next->rx_comp.first = 0;
1926                         remove_buff_from_pool(adapter, rx_buff);
1927                         continue;
1928                 }
1929
1930                 length = be32_to_cpu(next->rx_comp.len);
1931                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1932                 flags = next->rx_comp.flags;
1933                 skb = rx_buff->skb;
1934                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1935                                         length);
1936
1937                 /* VLAN Header has been stripped by the system firmware and
1938                  * needs to be inserted by the driver
1939                  */
1940                 if (adapter->rx_vlan_header_insertion &&
1941                     (flags & IBMVNIC_VLAN_STRIPPED))
1942                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1943                                                ntohs(next->rx_comp.vlan_tci));
1944
1945                 /* free the entry */
1946                 next->rx_comp.first = 0;
1947                 remove_buff_from_pool(adapter, rx_buff);
1948
1949                 skb_put(skb, length);
1950                 skb->protocol = eth_type_trans(skb, netdev);
1951                 skb_record_rx_queue(skb, scrq_num);
1952
1953                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1954                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1955                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1956                 }
1957
1958                 length = skb->len;
1959                 napi_gro_receive(napi, skb); /* send it up */
1960                 netdev->stats.rx_packets++;
1961                 netdev->stats.rx_bytes += length;
1962                 adapter->rx_stats_buffers[scrq_num].packets++;
1963                 adapter->rx_stats_buffers[scrq_num].bytes += length;
1964                 frames_processed++;
1965         }
1966
1967         if (adapter->state != VNIC_CLOSING)
1968                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1969
1970         if (frames_processed < budget) {
1971                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1972                 napi_complete_done(napi, frames_processed);
1973                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1974                     napi_reschedule(napi)) {
1975                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1976                         goto restart_poll;
1977                 }
1978         }
1979         return frames_processed;
1980 }
1981
1982 #ifdef CONFIG_NET_POLL_CONTROLLER
1983 static void ibmvnic_netpoll_controller(struct net_device *dev)
1984 {
1985         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1986         int i;
1987
1988         replenish_pools(netdev_priv(dev));
1989         for (i = 0; i < adapter->req_rx_queues; i++)
1990                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1991                                      adapter->rx_scrq[i]);
1992 }
1993 #endif
1994
1995 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1996 {
1997         adapter->fallback.mtu = adapter->req_mtu;
1998         adapter->fallback.rx_queues = adapter->req_rx_queues;
1999         adapter->fallback.tx_queues = adapter->req_tx_queues;
2000         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2001         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2002
2003         init_completion(&adapter->reset_done);
2004         ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2005         adapter->wait_for_reset = true;
2006         wait_for_completion(&adapter->reset_done);
2007
2008         if (adapter->reset_done_rc) {
2009                 adapter->desired.mtu = adapter->fallback.mtu;
2010                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2011                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2012                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2013                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2014
2015                 init_completion(&adapter->reset_done);
2016                 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2017                 wait_for_completion(&adapter->reset_done);
2018         }
2019         adapter->wait_for_reset = false;
2020
2021         return adapter->reset_done_rc;
2022 }
2023
2024 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2025 {
2026         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2027
2028         adapter->desired.mtu = new_mtu + ETH_HLEN;
2029
2030         return wait_for_reset(adapter);
2031 }
2032
2033 static const struct net_device_ops ibmvnic_netdev_ops = {
2034         .ndo_open               = ibmvnic_open,
2035         .ndo_stop               = ibmvnic_close,
2036         .ndo_start_xmit         = ibmvnic_xmit,
2037         .ndo_set_rx_mode        = ibmvnic_set_multi,
2038         .ndo_set_mac_address    = ibmvnic_set_mac,
2039         .ndo_validate_addr      = eth_validate_addr,
2040         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2041 #ifdef CONFIG_NET_POLL_CONTROLLER
2042         .ndo_poll_controller    = ibmvnic_netpoll_controller,
2043 #endif
2044         .ndo_change_mtu         = ibmvnic_change_mtu,
2045 };
2046
2047 /* ethtool functions */
2048
2049 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2050                                       struct ethtool_link_ksettings *cmd)
2051 {
2052         u32 supported, advertising;
2053
2054         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2055                           SUPPORTED_FIBRE);
2056         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2057                             ADVERTISED_FIBRE);
2058         cmd->base.speed = SPEED_1000;
2059         cmd->base.duplex = DUPLEX_FULL;
2060         cmd->base.port = PORT_FIBRE;
2061         cmd->base.phy_address = 0;
2062         cmd->base.autoneg = AUTONEG_ENABLE;
2063
2064         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2065                                                 supported);
2066         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2067                                                 advertising);
2068
2069         return 0;
2070 }
2071
2072 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2073                                 struct ethtool_drvinfo *info)
2074 {
2075         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2076
2077         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2078         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2079         strlcpy(info->fw_version, adapter->fw_version,
2080                 sizeof(info->fw_version));
2081 }
2082
2083 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2084 {
2085         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2086
2087         return adapter->msg_enable;
2088 }
2089
2090 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2091 {
2092         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2093
2094         adapter->msg_enable = data;
2095 }
2096
2097 static u32 ibmvnic_get_link(struct net_device *netdev)
2098 {
2099         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2100
2101         /* Don't need to send a query because we request a logical link up at
2102          * init and then we wait for link state indications
2103          */
2104         return adapter->logical_link_state;
2105 }
2106
2107 static void ibmvnic_get_ringparam(struct net_device *netdev,
2108                                   struct ethtool_ringparam *ring)
2109 {
2110         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2111
2112         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2113         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2114         ring->rx_mini_max_pending = 0;
2115         ring->rx_jumbo_max_pending = 0;
2116         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2117         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2118         ring->rx_mini_pending = 0;
2119         ring->rx_jumbo_pending = 0;
2120 }
2121
2122 static int ibmvnic_set_ringparam(struct net_device *netdev,
2123                                  struct ethtool_ringparam *ring)
2124 {
2125         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2126
2127         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2128             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2129                 netdev_err(netdev, "Invalid request.\n");
2130                 netdev_err(netdev, "Max tx buffers = %llu\n",
2131                            adapter->max_rx_add_entries_per_subcrq);
2132                 netdev_err(netdev, "Max rx buffers = %llu\n",
2133                            adapter->max_tx_entries_per_subcrq);
2134                 return -EINVAL;
2135         }
2136
2137         adapter->desired.rx_entries = ring->rx_pending;
2138         adapter->desired.tx_entries = ring->tx_pending;
2139
2140         return wait_for_reset(adapter);
2141 }
2142
2143 static void ibmvnic_get_channels(struct net_device *netdev,
2144                                  struct ethtool_channels *channels)
2145 {
2146         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2147
2148         channels->max_rx = adapter->max_rx_queues;
2149         channels->max_tx = adapter->max_tx_queues;
2150         channels->max_other = 0;
2151         channels->max_combined = 0;
2152         channels->rx_count = adapter->req_rx_queues;
2153         channels->tx_count = adapter->req_tx_queues;
2154         channels->other_count = 0;
2155         channels->combined_count = 0;
2156 }
2157
2158 static int ibmvnic_set_channels(struct net_device *netdev,
2159                                 struct ethtool_channels *channels)
2160 {
2161         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2162
2163         adapter->desired.rx_queues = channels->rx_count;
2164         adapter->desired.tx_queues = channels->tx_count;
2165
2166         return wait_for_reset(adapter);
2167 }
2168
2169 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2170 {
2171         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2172         int i;
2173
2174         if (stringset != ETH_SS_STATS)
2175                 return;
2176
2177         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2178                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2179
2180         for (i = 0; i < adapter->req_tx_queues; i++) {
2181                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2182                 data += ETH_GSTRING_LEN;
2183
2184                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2185                 data += ETH_GSTRING_LEN;
2186
2187                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2188                 data += ETH_GSTRING_LEN;
2189         }
2190
2191         for (i = 0; i < adapter->req_rx_queues; i++) {
2192                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2193                 data += ETH_GSTRING_LEN;
2194
2195                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2196                 data += ETH_GSTRING_LEN;
2197
2198                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2199                 data += ETH_GSTRING_LEN;
2200         }
2201 }
2202
2203 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2204 {
2205         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2206
2207         switch (sset) {
2208         case ETH_SS_STATS:
2209                 return ARRAY_SIZE(ibmvnic_stats) +
2210                        adapter->req_tx_queues * NUM_TX_STATS +
2211                        adapter->req_rx_queues * NUM_RX_STATS;
2212         default:
2213                 return -EOPNOTSUPP;
2214         }
2215 }
2216
2217 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2218                                       struct ethtool_stats *stats, u64 *data)
2219 {
2220         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2221         union ibmvnic_crq crq;
2222         int i, j;
2223
2224         memset(&crq, 0, sizeof(crq));
2225         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2226         crq.request_statistics.cmd = REQUEST_STATISTICS;
2227         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2228         crq.request_statistics.len =
2229             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2230
2231         /* Wait for data to be written */
2232         init_completion(&adapter->stats_done);
2233         ibmvnic_send_crq(adapter, &crq);
2234         wait_for_completion(&adapter->stats_done);
2235
2236         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2237                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2238                                                 ibmvnic_stats[i].offset));
2239
2240         for (j = 0; j < adapter->req_tx_queues; j++) {
2241                 data[i] = adapter->tx_stats_buffers[j].packets;
2242                 i++;
2243                 data[i] = adapter->tx_stats_buffers[j].bytes;
2244                 i++;
2245                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2246                 i++;
2247         }
2248
2249         for (j = 0; j < adapter->req_rx_queues; j++) {
2250                 data[i] = adapter->rx_stats_buffers[j].packets;
2251                 i++;
2252                 data[i] = adapter->rx_stats_buffers[j].bytes;
2253                 i++;
2254                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2255                 i++;
2256         }
2257 }
2258
2259 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2260         .get_drvinfo            = ibmvnic_get_drvinfo,
2261         .get_msglevel           = ibmvnic_get_msglevel,
2262         .set_msglevel           = ibmvnic_set_msglevel,
2263         .get_link               = ibmvnic_get_link,
2264         .get_ringparam          = ibmvnic_get_ringparam,
2265         .set_ringparam          = ibmvnic_set_ringparam,
2266         .get_channels           = ibmvnic_get_channels,
2267         .set_channels           = ibmvnic_set_channels,
2268         .get_strings            = ibmvnic_get_strings,
2269         .get_sset_count         = ibmvnic_get_sset_count,
2270         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2271         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2272 };
2273
2274 /* Routines for managing CRQs/sCRQs  */
2275
2276 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2277                                    struct ibmvnic_sub_crq_queue *scrq)
2278 {
2279         int rc;
2280
2281         if (scrq->irq) {
2282                 free_irq(scrq->irq, scrq);
2283                 irq_dispose_mapping(scrq->irq);
2284                 scrq->irq = 0;
2285         }
2286
2287         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2288         scrq->cur = 0;
2289
2290         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2291                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2292         return rc;
2293 }
2294
2295 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2296 {
2297         int i, rc;
2298
2299         for (i = 0; i < adapter->req_tx_queues; i++) {
2300                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2301                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2302                 if (rc)
2303                         return rc;
2304         }
2305
2306         for (i = 0; i < adapter->req_rx_queues; i++) {
2307                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2308                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2309                 if (rc)
2310                         return rc;
2311         }
2312
2313         return rc;
2314 }
2315
2316 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2317                                   struct ibmvnic_sub_crq_queue *scrq,
2318                                   bool do_h_free)
2319 {
2320         struct device *dev = &adapter->vdev->dev;
2321         long rc;
2322
2323         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2324
2325         if (do_h_free) {
2326                 /* Close the sub-crqs */
2327                 do {
2328                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2329                                                 adapter->vdev->unit_address,
2330                                                 scrq->crq_num);
2331                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2332
2333                 if (rc) {
2334                         netdev_err(adapter->netdev,
2335                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2336                                    scrq->crq_num, rc);
2337                 }
2338         }
2339
2340         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2341                          DMA_BIDIRECTIONAL);
2342         free_pages((unsigned long)scrq->msgs, 2);
2343         kfree(scrq);
2344 }
2345
2346 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2347                                                         *adapter)
2348 {
2349         struct device *dev = &adapter->vdev->dev;
2350         struct ibmvnic_sub_crq_queue *scrq;
2351         int rc;
2352
2353         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2354         if (!scrq)
2355                 return NULL;
2356
2357         scrq->msgs =
2358                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2359         if (!scrq->msgs) {
2360                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2361                 goto zero_page_failed;
2362         }
2363
2364         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2365                                          DMA_BIDIRECTIONAL);
2366         if (dma_mapping_error(dev, scrq->msg_token)) {
2367                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2368                 goto map_failed;
2369         }
2370
2371         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2372                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2373
2374         if (rc == H_RESOURCE)
2375                 rc = ibmvnic_reset_crq(adapter);
2376
2377         if (rc == H_CLOSED) {
2378                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2379         } else if (rc) {
2380                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2381                 goto reg_failed;
2382         }
2383
2384         scrq->adapter = adapter;
2385         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2386         spin_lock_init(&scrq->lock);
2387
2388         netdev_dbg(adapter->netdev,
2389                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2390                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2391
2392         return scrq;
2393
2394 reg_failed:
2395         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2396                          DMA_BIDIRECTIONAL);
2397 map_failed:
2398         free_pages((unsigned long)scrq->msgs, 2);
2399 zero_page_failed:
2400         kfree(scrq);
2401
2402         return NULL;
2403 }
2404
2405 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2406 {
2407         int i;
2408
2409         if (adapter->tx_scrq) {
2410                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2411                         if (!adapter->tx_scrq[i])
2412                                 continue;
2413
2414                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2415                                    i);
2416                         if (adapter->tx_scrq[i]->irq) {
2417                                 free_irq(adapter->tx_scrq[i]->irq,
2418                                          adapter->tx_scrq[i]);
2419                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2420                                 adapter->tx_scrq[i]->irq = 0;
2421                         }
2422
2423                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2424                                               do_h_free);
2425                 }
2426
2427                 kfree(adapter->tx_scrq);
2428                 adapter->tx_scrq = NULL;
2429                 adapter->num_active_tx_scrqs = 0;
2430         }
2431
2432         if (adapter->rx_scrq) {
2433                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2434                         if (!adapter->rx_scrq[i])
2435                                 continue;
2436
2437                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2438                                    i);
2439                         if (adapter->rx_scrq[i]->irq) {
2440                                 free_irq(adapter->rx_scrq[i]->irq,
2441                                          adapter->rx_scrq[i]);
2442                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2443                                 adapter->rx_scrq[i]->irq = 0;
2444                         }
2445
2446                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2447                                               do_h_free);
2448                 }
2449
2450                 kfree(adapter->rx_scrq);
2451                 adapter->rx_scrq = NULL;
2452                 adapter->num_active_rx_scrqs = 0;
2453         }
2454 }
2455
2456 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2457                             struct ibmvnic_sub_crq_queue *scrq)
2458 {
2459         struct device *dev = &adapter->vdev->dev;
2460         unsigned long rc;
2461
2462         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2463                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2464         if (rc)
2465                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2466                         scrq->hw_irq, rc);
2467         return rc;
2468 }
2469
2470 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2471                            struct ibmvnic_sub_crq_queue *scrq)
2472 {
2473         struct device *dev = &adapter->vdev->dev;
2474         unsigned long rc;
2475
2476         if (scrq->hw_irq > 0x100000000ULL) {
2477                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2478                 return 1;
2479         }
2480
2481         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2482                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2483         if (rc)
2484                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2485                         scrq->hw_irq, rc);
2486         return rc;
2487 }
2488
2489 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2490                                struct ibmvnic_sub_crq_queue *scrq)
2491 {
2492         struct device *dev = &adapter->vdev->dev;
2493         struct ibmvnic_tx_buff *txbuff;
2494         union sub_crq *next;
2495         int index;
2496         int i, j;
2497         u8 first;
2498
2499 restart_loop:
2500         while (pending_scrq(adapter, scrq)) {
2501                 unsigned int pool = scrq->pool_index;
2502                 int num_entries = 0;
2503
2504                 next = ibmvnic_next_scrq(adapter, scrq);
2505                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2506                         if (next->tx_comp.rcs[i]) {
2507                                 dev_err(dev, "tx error %x\n",
2508                                         next->tx_comp.rcs[i]);
2509                                 continue;
2510                         }
2511                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2512                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2513
2514                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2515                                 if (!txbuff->data_dma[j])
2516                                         continue;
2517
2518                                 txbuff->data_dma[j] = 0;
2519                         }
2520                         /* if sub_crq was sent indirectly */
2521                         first = txbuff->indir_arr[0].generic.first;
2522                         if (first == IBMVNIC_CRQ_CMD) {
2523                                 dma_unmap_single(dev, txbuff->indir_dma,
2524                                                  sizeof(txbuff->indir_arr),
2525                                                  DMA_TO_DEVICE);
2526                         }
2527
2528                         if (txbuff->last_frag) {
2529                                 dev_kfree_skb_any(txbuff->skb);
2530                                 txbuff->skb = NULL;
2531                         }
2532
2533                         num_entries += txbuff->num_entries;
2534
2535                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2536                                                      producer_index] = index;
2537                         adapter->tx_pool[pool].producer_index =
2538                             (adapter->tx_pool[pool].producer_index + 1) %
2539                             adapter->req_tx_entries_per_subcrq;
2540                 }
2541                 /* remove tx_comp scrq*/
2542                 next->tx_comp.first = 0;
2543
2544                 if (atomic_sub_return(num_entries, &scrq->used) <=
2545                     (adapter->req_tx_entries_per_subcrq / 2) &&
2546                     __netif_subqueue_stopped(adapter->netdev,
2547                                              scrq->pool_index)) {
2548                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2549                         netdev_info(adapter->netdev, "Started queue %d\n",
2550                                     scrq->pool_index);
2551                 }
2552         }
2553
2554         enable_scrq_irq(adapter, scrq);
2555
2556         if (pending_scrq(adapter, scrq)) {
2557                 disable_scrq_irq(adapter, scrq);
2558                 goto restart_loop;
2559         }
2560
2561         return 0;
2562 }
2563
2564 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2565 {
2566         struct ibmvnic_sub_crq_queue *scrq = instance;
2567         struct ibmvnic_adapter *adapter = scrq->adapter;
2568
2569         disable_scrq_irq(adapter, scrq);
2570         ibmvnic_complete_tx(adapter, scrq);
2571
2572         return IRQ_HANDLED;
2573 }
2574
2575 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2576 {
2577         struct ibmvnic_sub_crq_queue *scrq = instance;
2578         struct ibmvnic_adapter *adapter = scrq->adapter;
2579
2580         /* When booting a kdump kernel we can hit pending interrupts
2581          * prior to completing driver initialization.
2582          */
2583         if (unlikely(adapter->state != VNIC_OPEN))
2584                 return IRQ_NONE;
2585
2586         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2587
2588         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2589                 disable_scrq_irq(adapter, scrq);
2590                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2591         }
2592
2593         return IRQ_HANDLED;
2594 }
2595
2596 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2597 {
2598         struct device *dev = &adapter->vdev->dev;
2599         struct ibmvnic_sub_crq_queue *scrq;
2600         int i = 0, j = 0;
2601         int rc = 0;
2602
2603         for (i = 0; i < adapter->req_tx_queues; i++) {
2604                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2605                            i);
2606                 scrq = adapter->tx_scrq[i];
2607                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2608
2609                 if (!scrq->irq) {
2610                         rc = -EINVAL;
2611                         dev_err(dev, "Error mapping irq\n");
2612                         goto req_tx_irq_failed;
2613                 }
2614
2615                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2616                                  0, "ibmvnic_tx", scrq);
2617
2618                 if (rc) {
2619                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2620                                 scrq->irq, rc);
2621                         irq_dispose_mapping(scrq->irq);
2622                         goto req_tx_irq_failed;
2623                 }
2624         }
2625
2626         for (i = 0; i < adapter->req_rx_queues; i++) {
2627                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2628                            i);
2629                 scrq = adapter->rx_scrq[i];
2630                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2631                 if (!scrq->irq) {
2632                         rc = -EINVAL;
2633                         dev_err(dev, "Error mapping irq\n");
2634                         goto req_rx_irq_failed;
2635                 }
2636                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2637                                  0, "ibmvnic_rx", scrq);
2638                 if (rc) {
2639                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2640                                 scrq->irq, rc);
2641                         irq_dispose_mapping(scrq->irq);
2642                         goto req_rx_irq_failed;
2643                 }
2644         }
2645         return rc;
2646
2647 req_rx_irq_failed:
2648         for (j = 0; j < i; j++) {
2649                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2650                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2651         }
2652         i = adapter->req_tx_queues;
2653 req_tx_irq_failed:
2654         for (j = 0; j < i; j++) {
2655                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2656                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2657         }
2658         release_sub_crqs(adapter, 1);
2659         return rc;
2660 }
2661
2662 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2663 {
2664         struct device *dev = &adapter->vdev->dev;
2665         struct ibmvnic_sub_crq_queue **allqueues;
2666         int registered_queues = 0;
2667         int total_queues;
2668         int more = 0;
2669         int i;
2670
2671         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2672
2673         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2674         if (!allqueues)
2675                 return -1;
2676
2677         for (i = 0; i < total_queues; i++) {
2678                 allqueues[i] = init_sub_crq_queue(adapter);
2679                 if (!allqueues[i]) {
2680                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2681                         break;
2682                 }
2683                 registered_queues++;
2684         }
2685
2686         /* Make sure we were able to register the minimum number of queues */
2687         if (registered_queues <
2688             adapter->min_tx_queues + adapter->min_rx_queues) {
2689                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2690                 goto tx_failed;
2691         }
2692
2693         /* Distribute the failed allocated queues*/
2694         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2695                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2696                 switch (i % 3) {
2697                 case 0:
2698                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2699                                 adapter->req_rx_queues--;
2700                         else
2701                                 more++;
2702                         break;
2703                 case 1:
2704                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2705                                 adapter->req_tx_queues--;
2706                         else
2707                                 more++;
2708                         break;
2709                 }
2710         }
2711
2712         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2713                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2714         if (!adapter->tx_scrq)
2715                 goto tx_failed;
2716
2717         for (i = 0; i < adapter->req_tx_queues; i++) {
2718                 adapter->tx_scrq[i] = allqueues[i];
2719                 adapter->tx_scrq[i]->pool_index = i;
2720                 adapter->num_active_tx_scrqs++;
2721         }
2722
2723         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2724                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2725         if (!adapter->rx_scrq)
2726                 goto rx_failed;
2727
2728         for (i = 0; i < adapter->req_rx_queues; i++) {
2729                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2730                 adapter->rx_scrq[i]->scrq_num = i;
2731                 adapter->num_active_rx_scrqs++;
2732         }
2733
2734         kfree(allqueues);
2735         return 0;
2736
2737 rx_failed:
2738         kfree(adapter->tx_scrq);
2739         adapter->tx_scrq = NULL;
2740 tx_failed:
2741         for (i = 0; i < registered_queues; i++)
2742                 release_sub_crq_queue(adapter, allqueues[i], 1);
2743         kfree(allqueues);
2744         return -1;
2745 }
2746
2747 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2748 {
2749         struct device *dev = &adapter->vdev->dev;
2750         union ibmvnic_crq crq;
2751         int max_entries;
2752
2753         if (!retry) {
2754                 /* Sub-CRQ entries are 32 byte long */
2755                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2756
2757                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2758                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2759                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2760                         return;
2761                 }
2762
2763                 if (adapter->desired.mtu)
2764                         adapter->req_mtu = adapter->desired.mtu;
2765                 else
2766                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2767
2768                 if (!adapter->desired.tx_entries)
2769                         adapter->desired.tx_entries =
2770                                         adapter->max_tx_entries_per_subcrq;
2771                 if (!adapter->desired.rx_entries)
2772                         adapter->desired.rx_entries =
2773                                         adapter->max_rx_add_entries_per_subcrq;
2774
2775                 max_entries = IBMVNIC_MAX_LTB_SIZE /
2776                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2777
2778                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2779                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2780                         adapter->desired.tx_entries = max_entries;
2781                 }
2782
2783                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2784                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2785                         adapter->desired.rx_entries = max_entries;
2786                 }
2787
2788                 if (adapter->desired.tx_entries)
2789                         adapter->req_tx_entries_per_subcrq =
2790                                         adapter->desired.tx_entries;
2791                 else
2792                         adapter->req_tx_entries_per_subcrq =
2793                                         adapter->max_tx_entries_per_subcrq;
2794
2795                 if (adapter->desired.rx_entries)
2796                         adapter->req_rx_add_entries_per_subcrq =
2797                                         adapter->desired.rx_entries;
2798                 else
2799                         adapter->req_rx_add_entries_per_subcrq =
2800                                         adapter->max_rx_add_entries_per_subcrq;
2801
2802                 if (adapter->desired.tx_queues)
2803                         adapter->req_tx_queues =
2804                                         adapter->desired.tx_queues;
2805                 else
2806                         adapter->req_tx_queues =
2807                                         adapter->opt_tx_comp_sub_queues;
2808
2809                 if (adapter->desired.rx_queues)
2810                         adapter->req_rx_queues =
2811                                         adapter->desired.rx_queues;
2812                 else
2813                         adapter->req_rx_queues =
2814                                         adapter->opt_rx_comp_queues;
2815
2816                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2817         }
2818
2819         memset(&crq, 0, sizeof(crq));
2820         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2821         crq.request_capability.cmd = REQUEST_CAPABILITY;
2822
2823         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2824         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2825         atomic_inc(&adapter->running_cap_crqs);
2826         ibmvnic_send_crq(adapter, &crq);
2827
2828         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2829         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2830         atomic_inc(&adapter->running_cap_crqs);
2831         ibmvnic_send_crq(adapter, &crq);
2832
2833         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2834         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2835         atomic_inc(&adapter->running_cap_crqs);
2836         ibmvnic_send_crq(adapter, &crq);
2837
2838         crq.request_capability.capability =
2839             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2840         crq.request_capability.number =
2841             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2842         atomic_inc(&adapter->running_cap_crqs);
2843         ibmvnic_send_crq(adapter, &crq);
2844
2845         crq.request_capability.capability =
2846             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2847         crq.request_capability.number =
2848             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2849         atomic_inc(&adapter->running_cap_crqs);
2850         ibmvnic_send_crq(adapter, &crq);
2851
2852         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2853         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2854         atomic_inc(&adapter->running_cap_crqs);
2855         ibmvnic_send_crq(adapter, &crq);
2856
2857         if (adapter->netdev->flags & IFF_PROMISC) {
2858                 if (adapter->promisc_supported) {
2859                         crq.request_capability.capability =
2860                             cpu_to_be16(PROMISC_REQUESTED);
2861                         crq.request_capability.number = cpu_to_be64(1);
2862                         atomic_inc(&adapter->running_cap_crqs);
2863                         ibmvnic_send_crq(adapter, &crq);
2864                 }
2865         } else {
2866                 crq.request_capability.capability =
2867                     cpu_to_be16(PROMISC_REQUESTED);
2868                 crq.request_capability.number = cpu_to_be64(0);
2869                 atomic_inc(&adapter->running_cap_crqs);
2870                 ibmvnic_send_crq(adapter, &crq);
2871         }
2872 }
2873
2874 static int pending_scrq(struct ibmvnic_adapter *adapter,
2875                         struct ibmvnic_sub_crq_queue *scrq)
2876 {
2877         union sub_crq *entry = &scrq->msgs[scrq->cur];
2878
2879         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2880                 return 1;
2881         else
2882                 return 0;
2883 }
2884
2885 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2886                                         struct ibmvnic_sub_crq_queue *scrq)
2887 {
2888         union sub_crq *entry;
2889         unsigned long flags;
2890
2891         spin_lock_irqsave(&scrq->lock, flags);
2892         entry = &scrq->msgs[scrq->cur];
2893         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2894                 if (++scrq->cur == scrq->size)
2895                         scrq->cur = 0;
2896         } else {
2897                 entry = NULL;
2898         }
2899         spin_unlock_irqrestore(&scrq->lock, flags);
2900
2901         return entry;
2902 }
2903
2904 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2905 {
2906         struct ibmvnic_crq_queue *queue = &adapter->crq;
2907         union ibmvnic_crq *crq;
2908
2909         crq = &queue->msgs[queue->cur];
2910         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2911                 if (++queue->cur == queue->size)
2912                         queue->cur = 0;
2913         } else {
2914                 crq = NULL;
2915         }
2916
2917         return crq;
2918 }
2919
2920 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2921                        union sub_crq *sub_crq)
2922 {
2923         unsigned int ua = adapter->vdev->unit_address;
2924         struct device *dev = &adapter->vdev->dev;
2925         u64 *u64_crq = (u64 *)sub_crq;
2926         int rc;
2927
2928         netdev_dbg(adapter->netdev,
2929                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2930                    (unsigned long int)cpu_to_be64(remote_handle),
2931                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2932                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2933                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2934                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2935
2936         /* Make sure the hypervisor sees the complete request */
2937         mb();
2938
2939         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2940                                 cpu_to_be64(remote_handle),
2941                                 cpu_to_be64(u64_crq[0]),
2942                                 cpu_to_be64(u64_crq[1]),
2943                                 cpu_to_be64(u64_crq[2]),
2944                                 cpu_to_be64(u64_crq[3]));
2945
2946         if (rc) {
2947                 if (rc == H_CLOSED)
2948                         dev_warn(dev, "CRQ Queue closed\n");
2949                 dev_err(dev, "Send error (rc=%d)\n", rc);
2950         }
2951
2952         return rc;
2953 }
2954
2955 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2956                                 u64 remote_handle, u64 ioba, u64 num_entries)
2957 {
2958         unsigned int ua = adapter->vdev->unit_address;
2959         struct device *dev = &adapter->vdev->dev;
2960         int rc;
2961
2962         /* Make sure the hypervisor sees the complete request */
2963         mb();
2964         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2965                                 cpu_to_be64(remote_handle),
2966                                 ioba, num_entries);
2967
2968         if (rc) {
2969                 if (rc == H_CLOSED)
2970                         dev_warn(dev, "CRQ Queue closed\n");
2971                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2972         }
2973
2974         return rc;
2975 }
2976
2977 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2978                             union ibmvnic_crq *crq)
2979 {
2980         unsigned int ua = adapter->vdev->unit_address;
2981         struct device *dev = &adapter->vdev->dev;
2982         u64 *u64_crq = (u64 *)crq;
2983         int rc;
2984
2985         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2986                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2987                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2988
2989         /* Make sure the hypervisor sees the complete request */
2990         mb();
2991
2992         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2993                                 cpu_to_be64(u64_crq[0]),
2994                                 cpu_to_be64(u64_crq[1]));
2995
2996         if (rc) {
2997                 if (rc == H_CLOSED) {
2998                         dev_warn(dev, "CRQ Queue closed\n");
2999                         if (adapter->resetting)
3000                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3001                 }
3002
3003                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3004         }
3005
3006         return rc;
3007 }
3008
3009 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3010 {
3011         union ibmvnic_crq crq;
3012
3013         memset(&crq, 0, sizeof(crq));
3014         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3015         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3016         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3017
3018         return ibmvnic_send_crq(adapter, &crq);
3019 }
3020
3021 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3022 {
3023         union ibmvnic_crq crq;
3024
3025         memset(&crq, 0, sizeof(crq));
3026         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3027         crq.version_exchange.cmd = VERSION_EXCHANGE;
3028         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3029
3030         return ibmvnic_send_crq(adapter, &crq);
3031 }
3032
3033 struct vnic_login_client_data {
3034         u8      type;
3035         __be16  len;
3036         char    name;
3037 } __packed;
3038
3039 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3040 {
3041         int len;
3042
3043         /* Calculate the amount of buffer space needed for the
3044          * vnic client data in the login buffer. There are four entries,
3045          * OS name, LPAR name, device name, and a null last entry.
3046          */
3047         len = 4 * sizeof(struct vnic_login_client_data);
3048         len += 6; /* "Linux" plus NULL */
3049         len += strlen(utsname()->nodename) + 1;
3050         len += strlen(adapter->netdev->name) + 1;
3051
3052         return len;
3053 }
3054
3055 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3056                                  struct vnic_login_client_data *vlcd)
3057 {
3058         const char *os_name = "Linux";
3059         int len;
3060
3061         /* Type 1 - LPAR OS */
3062         vlcd->type = 1;
3063         len = strlen(os_name) + 1;
3064         vlcd->len = cpu_to_be16(len);
3065         strncpy(&vlcd->name, os_name, len);
3066         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3067
3068         /* Type 2 - LPAR name */
3069         vlcd->type = 2;
3070         len = strlen(utsname()->nodename) + 1;
3071         vlcd->len = cpu_to_be16(len);
3072         strncpy(&vlcd->name, utsname()->nodename, len);
3073         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3074
3075         /* Type 3 - device name */
3076         vlcd->type = 3;
3077         len = strlen(adapter->netdev->name) + 1;
3078         vlcd->len = cpu_to_be16(len);
3079         strncpy(&vlcd->name, adapter->netdev->name, len);
3080 }
3081
3082 static void send_login(struct ibmvnic_adapter *adapter)
3083 {
3084         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3085         struct ibmvnic_login_buffer *login_buffer;
3086         struct device *dev = &adapter->vdev->dev;
3087         dma_addr_t rsp_buffer_token;
3088         dma_addr_t buffer_token;
3089         size_t rsp_buffer_size;
3090         union ibmvnic_crq crq;
3091         size_t buffer_size;
3092         __be64 *tx_list_p;
3093         __be64 *rx_list_p;
3094         int client_data_len;
3095         struct vnic_login_client_data *vlcd;
3096         int i;
3097
3098         release_login_rsp_buffer(adapter);
3099         client_data_len = vnic_client_data_len(adapter);
3100
3101         buffer_size =
3102             sizeof(struct ibmvnic_login_buffer) +
3103             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3104             client_data_len;
3105
3106         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3107         if (!login_buffer)
3108                 goto buf_alloc_failed;
3109
3110         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3111                                       DMA_TO_DEVICE);
3112         if (dma_mapping_error(dev, buffer_token)) {
3113                 dev_err(dev, "Couldn't map login buffer\n");
3114                 goto buf_map_failed;
3115         }
3116
3117         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3118                           sizeof(u64) * adapter->req_tx_queues +
3119                           sizeof(u64) * adapter->req_rx_queues +
3120                           sizeof(u64) * adapter->req_rx_queues +
3121                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3122
3123         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3124         if (!login_rsp_buffer)
3125                 goto buf_rsp_alloc_failed;
3126
3127         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3128                                           rsp_buffer_size, DMA_FROM_DEVICE);
3129         if (dma_mapping_error(dev, rsp_buffer_token)) {
3130                 dev_err(dev, "Couldn't map login rsp buffer\n");
3131                 goto buf_rsp_map_failed;
3132         }
3133
3134         adapter->login_buf = login_buffer;
3135         adapter->login_buf_token = buffer_token;
3136         adapter->login_buf_sz = buffer_size;
3137         adapter->login_rsp_buf = login_rsp_buffer;
3138         adapter->login_rsp_buf_token = rsp_buffer_token;
3139         adapter->login_rsp_buf_sz = rsp_buffer_size;
3140
3141         login_buffer->len = cpu_to_be32(buffer_size);
3142         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3143         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3144         login_buffer->off_txcomp_subcrqs =
3145             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3146         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3147         login_buffer->off_rxcomp_subcrqs =
3148             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3149                         sizeof(u64) * adapter->req_tx_queues);
3150         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3151         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3152
3153         tx_list_p = (__be64 *)((char *)login_buffer +
3154                                       sizeof(struct ibmvnic_login_buffer));
3155         rx_list_p = (__be64 *)((char *)login_buffer +
3156                                       sizeof(struct ibmvnic_login_buffer) +
3157                                       sizeof(u64) * adapter->req_tx_queues);
3158
3159         for (i = 0; i < adapter->req_tx_queues; i++) {
3160                 if (adapter->tx_scrq[i]) {
3161                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3162                                                    crq_num);
3163                 }
3164         }
3165
3166         for (i = 0; i < adapter->req_rx_queues; i++) {
3167                 if (adapter->rx_scrq[i]) {
3168                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3169                                                    crq_num);
3170                 }
3171         }
3172
3173         /* Insert vNIC login client data */
3174         vlcd = (struct vnic_login_client_data *)
3175                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3176         login_buffer->client_data_offset =
3177                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3178         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3179
3180         vnic_add_client_data(adapter, vlcd);
3181
3182         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3183         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3184                 netdev_dbg(adapter->netdev, "%016lx\n",
3185                            ((unsigned long int *)(adapter->login_buf))[i]);
3186         }
3187
3188         memset(&crq, 0, sizeof(crq));
3189         crq.login.first = IBMVNIC_CRQ_CMD;
3190         crq.login.cmd = LOGIN;
3191         crq.login.ioba = cpu_to_be32(buffer_token);
3192         crq.login.len = cpu_to_be32(buffer_size);
3193         ibmvnic_send_crq(adapter, &crq);
3194
3195         return;
3196
3197 buf_rsp_map_failed:
3198         kfree(login_rsp_buffer);
3199 buf_rsp_alloc_failed:
3200         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3201 buf_map_failed:
3202         kfree(login_buffer);
3203 buf_alloc_failed:
3204         return;
3205 }
3206
3207 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3208                              u32 len, u8 map_id)
3209 {
3210         union ibmvnic_crq crq;
3211
3212         memset(&crq, 0, sizeof(crq));
3213         crq.request_map.first = IBMVNIC_CRQ_CMD;
3214         crq.request_map.cmd = REQUEST_MAP;
3215         crq.request_map.map_id = map_id;
3216         crq.request_map.ioba = cpu_to_be32(addr);
3217         crq.request_map.len = cpu_to_be32(len);
3218         ibmvnic_send_crq(adapter, &crq);
3219 }
3220
3221 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3222 {
3223         union ibmvnic_crq crq;
3224
3225         memset(&crq, 0, sizeof(crq));
3226         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3227         crq.request_unmap.cmd = REQUEST_UNMAP;
3228         crq.request_unmap.map_id = map_id;
3229         ibmvnic_send_crq(adapter, &crq);
3230 }
3231
3232 static void send_map_query(struct ibmvnic_adapter *adapter)
3233 {
3234         union ibmvnic_crq crq;
3235
3236         memset(&crq, 0, sizeof(crq));
3237         crq.query_map.first = IBMVNIC_CRQ_CMD;
3238         crq.query_map.cmd = QUERY_MAP;
3239         ibmvnic_send_crq(adapter, &crq);
3240 }
3241
3242 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3243 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3244 {
3245         union ibmvnic_crq crq;
3246
3247         atomic_set(&adapter->running_cap_crqs, 0);
3248         memset(&crq, 0, sizeof(crq));
3249         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3250         crq.query_capability.cmd = QUERY_CAPABILITY;
3251
3252         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3253         atomic_inc(&adapter->running_cap_crqs);
3254         ibmvnic_send_crq(adapter, &crq);
3255
3256         crq.query_capability.capability = cpu_to_be16(MIN_RX_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_ADD_QUEUES);
3261         atomic_inc(&adapter->running_cap_crqs);
3262         ibmvnic_send_crq(adapter, &crq);
3263
3264         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3265         atomic_inc(&adapter->running_cap_crqs);
3266         ibmvnic_send_crq(adapter, &crq);
3267
3268         crq.query_capability.capability = cpu_to_be16(MAX_RX_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_ADD_QUEUES);
3273         atomic_inc(&adapter->running_cap_crqs);
3274         ibmvnic_send_crq(adapter, &crq);
3275
3276         crq.query_capability.capability =
3277             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3278         atomic_inc(&adapter->running_cap_crqs);
3279         ibmvnic_send_crq(adapter, &crq);
3280
3281         crq.query_capability.capability =
3282             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3283         atomic_inc(&adapter->running_cap_crqs);
3284         ibmvnic_send_crq(adapter, &crq);
3285
3286         crq.query_capability.capability =
3287             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3288         atomic_inc(&adapter->running_cap_crqs);
3289         ibmvnic_send_crq(adapter, &crq);
3290
3291         crq.query_capability.capability =
3292             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3293         atomic_inc(&adapter->running_cap_crqs);
3294         ibmvnic_send_crq(adapter, &crq);
3295
3296         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3297         atomic_inc(&adapter->running_cap_crqs);
3298         ibmvnic_send_crq(adapter, &crq);
3299
3300         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3301         atomic_inc(&adapter->running_cap_crqs);
3302         ibmvnic_send_crq(adapter, &crq);
3303
3304         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3305         atomic_inc(&adapter->running_cap_crqs);
3306         ibmvnic_send_crq(adapter, &crq);
3307
3308         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3309         atomic_inc(&adapter->running_cap_crqs);
3310         ibmvnic_send_crq(adapter, &crq);
3311
3312         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3313         atomic_inc(&adapter->running_cap_crqs);
3314         ibmvnic_send_crq(adapter, &crq);
3315
3316         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3317         atomic_inc(&adapter->running_cap_crqs);
3318         ibmvnic_send_crq(adapter, &crq);
3319
3320         crq.query_capability.capability = cpu_to_be16(RX_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(MAX_TX_SG_ENTRIES);
3325         atomic_inc(&adapter->running_cap_crqs);
3326         ibmvnic_send_crq(adapter, &crq);
3327
3328         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3329         atomic_inc(&adapter->running_cap_crqs);
3330         ibmvnic_send_crq(adapter, &crq);
3331
3332         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3333         atomic_inc(&adapter->running_cap_crqs);
3334         ibmvnic_send_crq(adapter, &crq);
3335
3336         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3337         atomic_inc(&adapter->running_cap_crqs);
3338         ibmvnic_send_crq(adapter, &crq);
3339
3340         crq.query_capability.capability =
3341                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3342         atomic_inc(&adapter->running_cap_crqs);
3343         ibmvnic_send_crq(adapter, &crq);
3344
3345         crq.query_capability.capability =
3346                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3347         atomic_inc(&adapter->running_cap_crqs);
3348         ibmvnic_send_crq(adapter, &crq);
3349
3350         crq.query_capability.capability =
3351                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3352         atomic_inc(&adapter->running_cap_crqs);
3353         ibmvnic_send_crq(adapter, &crq);
3354
3355         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3356         atomic_inc(&adapter->running_cap_crqs);
3357         ibmvnic_send_crq(adapter, &crq);
3358 }
3359
3360 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3361                                 struct ibmvnic_adapter *adapter)
3362 {
3363         struct device *dev = &adapter->vdev->dev;
3364
3365         if (crq->get_vpd_size_rsp.rc.code) {
3366                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3367                         crq->get_vpd_size_rsp.rc.code);
3368                 complete(&adapter->fw_done);
3369                 return;
3370         }
3371
3372         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3373         complete(&adapter->fw_done);
3374 }
3375
3376 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3377                            struct ibmvnic_adapter *adapter)
3378 {
3379         struct device *dev = &adapter->vdev->dev;
3380         unsigned char *substr = NULL;
3381         u8 fw_level_len = 0;
3382
3383         memset(adapter->fw_version, 0, 32);
3384
3385         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3386                          DMA_FROM_DEVICE);
3387
3388         if (crq->get_vpd_rsp.rc.code) {
3389                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3390                         crq->get_vpd_rsp.rc.code);
3391                 goto complete;
3392         }
3393
3394         /* get the position of the firmware version info
3395          * located after the ASCII 'RM' substring in the buffer
3396          */
3397         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3398         if (!substr) {
3399                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3400                 goto complete;
3401         }
3402
3403         /* get length of firmware level ASCII substring */
3404         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3405                 fw_level_len = *(substr + 2);
3406         } else {
3407                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3408                 goto complete;
3409         }
3410
3411         /* copy firmware version string from vpd into adapter */
3412         if ((substr + 3 + fw_level_len) <
3413             (adapter->vpd->buff + adapter->vpd->len)) {
3414                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3415         } else {
3416                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3417         }
3418
3419 complete:
3420         if (adapter->fw_version[0] == '\0')
3421                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3422         complete(&adapter->fw_done);
3423 }
3424
3425 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3426 {
3427         struct device *dev = &adapter->vdev->dev;
3428         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3429         union ibmvnic_crq crq;
3430         int i;
3431
3432         dma_unmap_single(dev, adapter->ip_offload_tok,
3433                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3434
3435         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3436         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3437                 netdev_dbg(adapter->netdev, "%016lx\n",
3438                            ((unsigned long int *)(buf))[i]);
3439
3440         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3441         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3442         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3443                    buf->tcp_ipv4_chksum);
3444         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3445                    buf->tcp_ipv6_chksum);
3446         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3447                    buf->udp_ipv4_chksum);
3448         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3449                    buf->udp_ipv6_chksum);
3450         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3451                    buf->large_tx_ipv4);
3452         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3453                    buf->large_tx_ipv6);
3454         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3455                    buf->large_rx_ipv4);
3456         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3457                    buf->large_rx_ipv6);
3458         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3459                    buf->max_ipv4_header_size);
3460         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3461                    buf->max_ipv6_header_size);
3462         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3463                    buf->max_tcp_header_size);
3464         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3465                    buf->max_udp_header_size);
3466         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3467                    buf->max_large_tx_size);
3468         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3469                    buf->max_large_rx_size);
3470         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3471                    buf->ipv6_extension_header);
3472         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3473                    buf->tcp_pseudosum_req);
3474         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3475                    buf->num_ipv6_ext_headers);
3476         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3477                    buf->off_ipv6_ext_headers);
3478
3479         adapter->ip_offload_ctrl_tok =
3480             dma_map_single(dev, &adapter->ip_offload_ctrl,
3481                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3482
3483         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3484                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3485                 return;
3486         }
3487
3488         adapter->ip_offload_ctrl.len =
3489             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3490         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3491         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3492         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3493         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3494         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3495         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3496         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3497         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3498         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3499
3500         /* large_rx disabled for now, additional features needed */
3501         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3502         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3503
3504         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3505
3506         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3507                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3508
3509         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3510                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3511
3512         if ((adapter->netdev->features &
3513             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3514                 adapter->netdev->features |= NETIF_F_RXCSUM;
3515
3516         if (buf->large_tx_ipv4)
3517                 adapter->netdev->features |= NETIF_F_TSO;
3518         if (buf->large_tx_ipv6)
3519                 adapter->netdev->features |= NETIF_F_TSO6;
3520
3521         adapter->netdev->hw_features |= adapter->netdev->features;
3522
3523         memset(&crq, 0, sizeof(crq));
3524         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3525         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3526         crq.control_ip_offload.len =
3527             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3528         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3529         ibmvnic_send_crq(adapter, &crq);
3530 }
3531
3532 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3533                                   struct ibmvnic_adapter *adapter)
3534 {
3535         struct device *dev = &adapter->vdev->dev;
3536         struct ibmvnic_error_buff *error_buff, *tmp;
3537         unsigned long flags;
3538         bool found = false;
3539         int i;
3540
3541         if (!crq->request_error_rsp.rc.code) {
3542                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3543                          crq->request_error_rsp.rc.code);
3544                 return;
3545         }
3546
3547         spin_lock_irqsave(&adapter->error_list_lock, flags);
3548         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3549                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3550                         found = true;
3551                         list_del(&error_buff->list);
3552                         break;
3553                 }
3554         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3555
3556         if (!found) {
3557                 dev_err(dev, "Couldn't find error id %x\n",
3558                         be32_to_cpu(crq->request_error_rsp.error_id));
3559                 return;
3560         }
3561
3562         dev_err(dev, "Detailed info for error id %x:",
3563                 be32_to_cpu(crq->request_error_rsp.error_id));
3564
3565         for (i = 0; i < error_buff->len; i++) {
3566                 pr_cont("%02x", (int)error_buff->buff[i]);
3567                 if (i % 8 == 7)
3568                         pr_cont(" ");
3569         }
3570         pr_cont("\n");
3571
3572         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3573                          DMA_FROM_DEVICE);
3574         kfree(error_buff->buff);
3575         kfree(error_buff);
3576 }
3577
3578 static void request_error_information(struct ibmvnic_adapter *adapter,
3579                                       union ibmvnic_crq *err_crq)
3580 {
3581         struct device *dev = &adapter->vdev->dev;
3582         struct net_device *netdev = adapter->netdev;
3583         struct ibmvnic_error_buff *error_buff;
3584         unsigned long timeout = msecs_to_jiffies(30000);
3585         union ibmvnic_crq crq;
3586         unsigned long flags;
3587         int rc, detail_len;
3588
3589         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3590         if (!error_buff)
3591                 return;
3592
3593         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3594         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3595         if (!error_buff->buff) {
3596                 kfree(error_buff);
3597                 return;
3598         }
3599
3600         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3601                                          DMA_FROM_DEVICE);
3602         if (dma_mapping_error(dev, error_buff->dma)) {
3603                 netdev_err(netdev, "Couldn't map error buffer\n");
3604                 kfree(error_buff->buff);
3605                 kfree(error_buff);
3606                 return;
3607         }
3608
3609         error_buff->len = detail_len;
3610         error_buff->error_id = err_crq->error_indication.error_id;
3611
3612         spin_lock_irqsave(&adapter->error_list_lock, flags);
3613         list_add_tail(&error_buff->list, &adapter->errors);
3614         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3615
3616         memset(&crq, 0, sizeof(crq));
3617         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3618         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3619         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3620         crq.request_error_info.len = cpu_to_be32(detail_len);
3621         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3622
3623         rc = ibmvnic_send_crq(adapter, &crq);
3624         if (rc) {
3625                 netdev_err(netdev, "failed to request error information\n");
3626                 goto err_info_fail;
3627         }
3628
3629         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3630                 netdev_err(netdev, "timeout waiting for error information\n");
3631                 goto err_info_fail;
3632         }
3633
3634         return;
3635
3636 err_info_fail:
3637         spin_lock_irqsave(&adapter->error_list_lock, flags);
3638         list_del(&error_buff->list);
3639         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3640
3641         kfree(error_buff->buff);
3642         kfree(error_buff);
3643 }
3644
3645 static void handle_error_indication(union ibmvnic_crq *crq,
3646                                     struct ibmvnic_adapter *adapter)
3647 {
3648         struct device *dev = &adapter->vdev->dev;
3649
3650         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3651                 crq->error_indication.flags
3652                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3653                 be32_to_cpu(crq->error_indication.error_id),
3654                 be16_to_cpu(crq->error_indication.error_cause));
3655
3656         if (be32_to_cpu(crq->error_indication.error_id))
3657                 request_error_information(adapter, crq);
3658
3659         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3660                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3661         else
3662                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3663 }
3664
3665 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3666                                  struct ibmvnic_adapter *adapter)
3667 {
3668         struct net_device *netdev = adapter->netdev;
3669         struct device *dev = &adapter->vdev->dev;
3670         long rc;
3671
3672         rc = crq->change_mac_addr_rsp.rc.code;
3673         if (rc) {
3674                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3675                 goto out;
3676         }
3677         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3678                ETH_ALEN);
3679 out:
3680         complete(&adapter->fw_done);
3681         return rc;
3682 }
3683
3684 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3685                                    struct ibmvnic_adapter *adapter)
3686 {
3687         struct device *dev = &adapter->vdev->dev;
3688         u64 *req_value;
3689         char *name;
3690
3691         atomic_dec(&adapter->running_cap_crqs);
3692         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3693         case REQ_TX_QUEUES:
3694                 req_value = &adapter->req_tx_queues;
3695                 name = "tx";
3696                 break;
3697         case REQ_RX_QUEUES:
3698                 req_value = &adapter->req_rx_queues;
3699                 name = "rx";
3700                 break;
3701         case REQ_RX_ADD_QUEUES:
3702                 req_value = &adapter->req_rx_add_queues;
3703                 name = "rx_add";
3704                 break;
3705         case REQ_TX_ENTRIES_PER_SUBCRQ:
3706                 req_value = &adapter->req_tx_entries_per_subcrq;
3707                 name = "tx_entries_per_subcrq";
3708                 break;
3709         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3710                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3711                 name = "rx_add_entries_per_subcrq";
3712                 break;
3713         case REQ_MTU:
3714                 req_value = &adapter->req_mtu;
3715                 name = "mtu";
3716                 break;
3717         case PROMISC_REQUESTED:
3718                 req_value = &adapter->promisc;
3719                 name = "promisc";
3720                 break;
3721         default:
3722                 dev_err(dev, "Got invalid cap request rsp %d\n",
3723                         crq->request_capability.capability);
3724                 return;
3725         }
3726
3727         switch (crq->request_capability_rsp.rc.code) {
3728         case SUCCESS:
3729                 break;
3730         case PARTIALSUCCESS:
3731                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3732                          *req_value,
3733                          (long int)be64_to_cpu(crq->request_capability_rsp.
3734                                                number), name);
3735
3736                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3737                     REQ_MTU) {
3738                         pr_err("mtu of %llu is not supported. Reverting.\n",
3739                                *req_value);
3740                         *req_value = adapter->fallback.mtu;
3741                 } else {
3742                         *req_value =
3743                                 be64_to_cpu(crq->request_capability_rsp.number);
3744                 }
3745
3746                 ibmvnic_send_req_caps(adapter, 1);
3747                 return;
3748         default:
3749                 dev_err(dev, "Error %d in request cap rsp\n",
3750                         crq->request_capability_rsp.rc.code);
3751                 return;
3752         }
3753
3754         /* Done receiving requested capabilities, query IP offload support */
3755         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3756                 union ibmvnic_crq newcrq;
3757                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3758                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3759                     &adapter->ip_offload_buf;
3760
3761                 adapter->wait_capability = false;
3762                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3763                                                          buf_sz,
3764                                                          DMA_FROM_DEVICE);
3765
3766                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3767                         if (!firmware_has_feature(FW_FEATURE_CMO))
3768                                 dev_err(dev, "Couldn't map offload buffer\n");
3769                         return;
3770                 }
3771
3772                 memset(&newcrq, 0, sizeof(newcrq));
3773                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3774                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3775                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3776                 newcrq.query_ip_offload.ioba =
3777                     cpu_to_be32(adapter->ip_offload_tok);
3778
3779                 ibmvnic_send_crq(adapter, &newcrq);
3780         }
3781 }
3782
3783 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3784                             struct ibmvnic_adapter *adapter)
3785 {
3786         struct device *dev = &adapter->vdev->dev;
3787         struct net_device *netdev = adapter->netdev;
3788         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3789         struct ibmvnic_login_buffer *login = adapter->login_buf;
3790         int i;
3791
3792         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3793                          DMA_BIDIRECTIONAL);
3794         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3795                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3796
3797         /* If the number of queues requested can't be allocated by the
3798          * server, the login response will return with code 1. We will need
3799          * to resend the login buffer with fewer queues requested.
3800          */
3801         if (login_rsp_crq->generic.rc.code) {
3802                 adapter->renegotiate = true;
3803                 complete(&adapter->init_done);
3804                 return 0;
3805         }
3806
3807         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3808
3809         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3810         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3811                 netdev_dbg(adapter->netdev, "%016lx\n",
3812                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3813         }
3814
3815         /* Sanity checks */
3816         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3817             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3818              adapter->req_rx_add_queues !=
3819              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3820                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3821                 ibmvnic_remove(adapter->vdev);
3822                 return -EIO;
3823         }
3824         release_login_buffer(adapter);
3825         complete(&adapter->init_done);
3826
3827         return 0;
3828 }
3829
3830 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3831                                      struct ibmvnic_adapter *adapter)
3832 {
3833         struct device *dev = &adapter->vdev->dev;
3834         long rc;
3835
3836         rc = crq->request_unmap_rsp.rc.code;
3837         if (rc)
3838                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3839 }
3840
3841 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3842                                  struct ibmvnic_adapter *adapter)
3843 {
3844         struct net_device *netdev = adapter->netdev;
3845         struct device *dev = &adapter->vdev->dev;
3846         long rc;
3847
3848         rc = crq->query_map_rsp.rc.code;
3849         if (rc) {
3850                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3851                 return;
3852         }
3853         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3854                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3855                    crq->query_map_rsp.free_pages);
3856 }
3857
3858 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3859                                  struct ibmvnic_adapter *adapter)
3860 {
3861         struct net_device *netdev = adapter->netdev;
3862         struct device *dev = &adapter->vdev->dev;
3863         long rc;
3864
3865         atomic_dec(&adapter->running_cap_crqs);
3866         netdev_dbg(netdev, "Outstanding queries: %d\n",
3867                    atomic_read(&adapter->running_cap_crqs));
3868         rc = crq->query_capability.rc.code;
3869         if (rc) {
3870                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3871                 goto out;
3872         }
3873
3874         switch (be16_to_cpu(crq->query_capability.capability)) {
3875         case MIN_TX_QUEUES:
3876                 adapter->min_tx_queues =
3877                     be64_to_cpu(crq->query_capability.number);
3878                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3879                            adapter->min_tx_queues);
3880                 break;
3881         case MIN_RX_QUEUES:
3882                 adapter->min_rx_queues =
3883                     be64_to_cpu(crq->query_capability.number);
3884                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3885                            adapter->min_rx_queues);
3886                 break;
3887         case MIN_RX_ADD_QUEUES:
3888                 adapter->min_rx_add_queues =
3889                     be64_to_cpu(crq->query_capability.number);
3890                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3891                            adapter->min_rx_add_queues);
3892                 break;
3893         case MAX_TX_QUEUES:
3894                 adapter->max_tx_queues =
3895                     be64_to_cpu(crq->query_capability.number);
3896                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3897                            adapter->max_tx_queues);
3898                 break;
3899         case MAX_RX_QUEUES:
3900                 adapter->max_rx_queues =
3901                     be64_to_cpu(crq->query_capability.number);
3902                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3903                            adapter->max_rx_queues);
3904                 break;
3905         case MAX_RX_ADD_QUEUES:
3906                 adapter->max_rx_add_queues =
3907                     be64_to_cpu(crq->query_capability.number);
3908                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3909                            adapter->max_rx_add_queues);
3910                 break;
3911         case MIN_TX_ENTRIES_PER_SUBCRQ:
3912                 adapter->min_tx_entries_per_subcrq =
3913                     be64_to_cpu(crq->query_capability.number);
3914                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3915                            adapter->min_tx_entries_per_subcrq);
3916                 break;
3917         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3918                 adapter->min_rx_add_entries_per_subcrq =
3919                     be64_to_cpu(crq->query_capability.number);
3920                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3921                            adapter->min_rx_add_entries_per_subcrq);
3922                 break;
3923         case MAX_TX_ENTRIES_PER_SUBCRQ:
3924                 adapter->max_tx_entries_per_subcrq =
3925                     be64_to_cpu(crq->query_capability.number);
3926                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3927                            adapter->max_tx_entries_per_subcrq);
3928                 break;
3929         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3930                 adapter->max_rx_add_entries_per_subcrq =
3931                     be64_to_cpu(crq->query_capability.number);
3932                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3933                            adapter->max_rx_add_entries_per_subcrq);
3934                 break;
3935         case TCP_IP_OFFLOAD:
3936                 adapter->tcp_ip_offload =
3937                     be64_to_cpu(crq->query_capability.number);
3938                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3939                            adapter->tcp_ip_offload);
3940                 break;
3941         case PROMISC_SUPPORTED:
3942                 adapter->promisc_supported =
3943                     be64_to_cpu(crq->query_capability.number);
3944                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3945                            adapter->promisc_supported);
3946                 break;
3947         case MIN_MTU:
3948                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3949                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3950                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3951                 break;
3952         case MAX_MTU:
3953                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3954                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3955                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3956                 break;
3957         case MAX_MULTICAST_FILTERS:
3958                 adapter->max_multicast_filters =
3959                     be64_to_cpu(crq->query_capability.number);
3960                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3961                            adapter->max_multicast_filters);
3962                 break;
3963         case VLAN_HEADER_INSERTION:
3964                 adapter->vlan_header_insertion =
3965                     be64_to_cpu(crq->query_capability.number);
3966                 if (adapter->vlan_header_insertion)
3967                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3968                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3969                            adapter->vlan_header_insertion);
3970                 break;
3971         case RX_VLAN_HEADER_INSERTION:
3972                 adapter->rx_vlan_header_insertion =
3973                     be64_to_cpu(crq->query_capability.number);
3974                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3975                            adapter->rx_vlan_header_insertion);
3976                 break;
3977         case MAX_TX_SG_ENTRIES:
3978                 adapter->max_tx_sg_entries =
3979                     be64_to_cpu(crq->query_capability.number);
3980                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3981                            adapter->max_tx_sg_entries);
3982                 break;
3983         case RX_SG_SUPPORTED:
3984                 adapter->rx_sg_supported =
3985                     be64_to_cpu(crq->query_capability.number);
3986                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3987                            adapter->rx_sg_supported);
3988                 break;
3989         case OPT_TX_COMP_SUB_QUEUES:
3990                 adapter->opt_tx_comp_sub_queues =
3991                     be64_to_cpu(crq->query_capability.number);
3992                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3993                            adapter->opt_tx_comp_sub_queues);
3994                 break;
3995         case OPT_RX_COMP_QUEUES:
3996                 adapter->opt_rx_comp_queues =
3997                     be64_to_cpu(crq->query_capability.number);
3998                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3999                            adapter->opt_rx_comp_queues);
4000                 break;
4001         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4002                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4003                     be64_to_cpu(crq->query_capability.number);
4004                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4005                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4006                 break;
4007         case OPT_TX_ENTRIES_PER_SUBCRQ:
4008                 adapter->opt_tx_entries_per_subcrq =
4009                     be64_to_cpu(crq->query_capability.number);
4010                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4011                            adapter->opt_tx_entries_per_subcrq);
4012                 break;
4013         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4014                 adapter->opt_rxba_entries_per_subcrq =
4015                     be64_to_cpu(crq->query_capability.number);
4016                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4017                            adapter->opt_rxba_entries_per_subcrq);
4018                 break;
4019         case TX_RX_DESC_REQ:
4020                 adapter->tx_rx_desc_req = crq->query_capability.number;
4021                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4022                            adapter->tx_rx_desc_req);
4023                 break;
4024
4025         default:
4026                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4027                            crq->query_capability.capability);
4028         }
4029
4030 out:
4031         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4032                 adapter->wait_capability = false;
4033                 ibmvnic_send_req_caps(adapter, 0);
4034         }
4035 }
4036
4037 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4038                                struct ibmvnic_adapter *adapter)
4039 {
4040         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4041         struct net_device *netdev = adapter->netdev;
4042         struct device *dev = &adapter->vdev->dev;
4043         u64 *u64_crq = (u64 *)crq;
4044         long rc;
4045
4046         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4047                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4048                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4049         switch (gen_crq->first) {
4050         case IBMVNIC_CRQ_INIT_RSP:
4051                 switch (gen_crq->cmd) {
4052                 case IBMVNIC_CRQ_INIT:
4053                         dev_info(dev, "Partner initialized\n");
4054                         adapter->from_passive_init = true;
4055                         complete(&adapter->init_done);
4056                         break;
4057                 case IBMVNIC_CRQ_INIT_COMPLETE:
4058                         dev_info(dev, "Partner initialization complete\n");
4059                         send_version_xchg(adapter);
4060                         break;
4061                 default:
4062                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4063                 }
4064                 return;
4065         case IBMVNIC_CRQ_XPORT_EVENT:
4066                 netif_carrier_off(netdev);
4067                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4068                         dev_info(dev, "Migrated, re-enabling adapter\n");
4069                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4070                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4071                         dev_info(dev, "Backing device failover detected\n");
4072                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4073                 } else {
4074                         /* The adapter lost the connection */
4075                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4076                                 gen_crq->cmd);
4077                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4078                 }
4079                 return;
4080         case IBMVNIC_CRQ_CMD_RSP:
4081                 break;
4082         default:
4083                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4084                         gen_crq->first);
4085                 return;
4086         }
4087
4088         switch (gen_crq->cmd) {
4089         case VERSION_EXCHANGE_RSP:
4090                 rc = crq->version_exchange_rsp.rc.code;
4091                 if (rc) {
4092                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4093                         break;
4094                 }
4095                 dev_info(dev, "Partner protocol version is %d\n",
4096                          crq->version_exchange_rsp.version);
4097                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4098                     ibmvnic_version)
4099                         ibmvnic_version =
4100                             be16_to_cpu(crq->version_exchange_rsp.version);
4101                 send_cap_queries(adapter);
4102                 break;
4103         case QUERY_CAPABILITY_RSP:
4104                 handle_query_cap_rsp(crq, adapter);
4105                 break;
4106         case QUERY_MAP_RSP:
4107                 handle_query_map_rsp(crq, adapter);
4108                 break;
4109         case REQUEST_MAP_RSP:
4110                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4111                 complete(&adapter->fw_done);
4112                 break;
4113         case REQUEST_UNMAP_RSP:
4114                 handle_request_unmap_rsp(crq, adapter);
4115                 break;
4116         case REQUEST_CAPABILITY_RSP:
4117                 handle_request_cap_rsp(crq, adapter);
4118                 break;
4119         case LOGIN_RSP:
4120                 netdev_dbg(netdev, "Got Login Response\n");
4121                 handle_login_rsp(crq, adapter);
4122                 break;
4123         case LOGICAL_LINK_STATE_RSP:
4124                 netdev_dbg(netdev,
4125                            "Got Logical Link State Response, state: %d rc: %d\n",
4126                            crq->logical_link_state_rsp.link_state,
4127                            crq->logical_link_state_rsp.rc.code);
4128                 adapter->logical_link_state =
4129                     crq->logical_link_state_rsp.link_state;
4130                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4131                 complete(&adapter->init_done);
4132                 break;
4133         case LINK_STATE_INDICATION:
4134                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4135                 adapter->phys_link_state =
4136                     crq->link_state_indication.phys_link_state;
4137                 adapter->logical_link_state =
4138                     crq->link_state_indication.logical_link_state;
4139                 break;
4140         case CHANGE_MAC_ADDR_RSP:
4141                 netdev_dbg(netdev, "Got MAC address change Response\n");
4142                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4143                 break;
4144         case ERROR_INDICATION:
4145                 netdev_dbg(netdev, "Got Error Indication\n");
4146                 handle_error_indication(crq, adapter);
4147                 break;
4148         case REQUEST_ERROR_RSP:
4149                 netdev_dbg(netdev, "Got Error Detail Response\n");
4150                 handle_error_info_rsp(crq, adapter);
4151                 break;
4152         case REQUEST_STATISTICS_RSP:
4153                 netdev_dbg(netdev, "Got Statistics Response\n");
4154                 complete(&adapter->stats_done);
4155                 break;
4156         case QUERY_IP_OFFLOAD_RSP:
4157                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4158                 handle_query_ip_offload_rsp(adapter);
4159                 break;
4160         case MULTICAST_CTRL_RSP:
4161                 netdev_dbg(netdev, "Got multicast control Response\n");
4162                 break;
4163         case CONTROL_IP_OFFLOAD_RSP:
4164                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4165                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4166                                  sizeof(adapter->ip_offload_ctrl),
4167                                  DMA_TO_DEVICE);
4168                 complete(&adapter->init_done);
4169                 break;
4170         case COLLECT_FW_TRACE_RSP:
4171                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4172                 complete(&adapter->fw_done);
4173                 break;
4174         case GET_VPD_SIZE_RSP:
4175                 handle_vpd_size_rsp(crq, adapter);
4176                 break;
4177         case GET_VPD_RSP:
4178                 handle_vpd_rsp(crq, adapter);
4179                 break;
4180         default:
4181                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4182                            gen_crq->cmd);
4183         }
4184 }
4185
4186 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4187 {
4188         struct ibmvnic_adapter *adapter = instance;
4189
4190         tasklet_schedule(&adapter->tasklet);
4191         return IRQ_HANDLED;
4192 }
4193
4194 static void ibmvnic_tasklet(void *data)
4195 {
4196         struct ibmvnic_adapter *adapter = data;
4197         struct ibmvnic_crq_queue *queue = &adapter->crq;
4198         union ibmvnic_crq *crq;
4199         unsigned long flags;
4200         bool done = false;
4201
4202         spin_lock_irqsave(&queue->lock, flags);
4203         while (!done) {
4204                 /* Pull all the valid messages off the CRQ */
4205                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4206                         ibmvnic_handle_crq(crq, adapter);
4207                         crq->generic.first = 0;
4208                 }
4209
4210                 /* remain in tasklet until all
4211                  * capabilities responses are received
4212                  */
4213                 if (!adapter->wait_capability)
4214                         done = true;
4215         }
4216         /* if capabilities CRQ's were sent in this tasklet, the following
4217          * tasklet must wait until all responses are received
4218          */
4219         if (atomic_read(&adapter->running_cap_crqs) != 0)
4220                 adapter->wait_capability = true;
4221         spin_unlock_irqrestore(&queue->lock, flags);
4222 }
4223
4224 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4225 {
4226         struct vio_dev *vdev = adapter->vdev;
4227         int rc;
4228
4229         do {
4230                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4231         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4232
4233         if (rc)
4234                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4235
4236         return rc;
4237 }
4238
4239 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4240 {
4241         struct ibmvnic_crq_queue *crq = &adapter->crq;
4242         struct device *dev = &adapter->vdev->dev;
4243         struct vio_dev *vdev = adapter->vdev;
4244         int rc;
4245
4246         /* Close the CRQ */
4247         do {
4248                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4249         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4250
4251         /* Clean out the queue */
4252         memset(crq->msgs, 0, PAGE_SIZE);
4253         crq->cur = 0;
4254
4255         /* And re-open it again */
4256         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4257                                 crq->msg_token, PAGE_SIZE);
4258
4259         if (rc == H_CLOSED)
4260                 /* Adapter is good, but other end is not ready */
4261                 dev_warn(dev, "Partner adapter not ready\n");
4262         else if (rc != 0)
4263                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4264
4265         return rc;
4266 }
4267
4268 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4269 {
4270         struct ibmvnic_crq_queue *crq = &adapter->crq;
4271         struct vio_dev *vdev = adapter->vdev;
4272         long rc;
4273
4274         if (!crq->msgs)
4275                 return;
4276
4277         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4278         free_irq(vdev->irq, adapter);
4279         tasklet_kill(&adapter->tasklet);
4280         do {
4281                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4282         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4283
4284         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4285                          DMA_BIDIRECTIONAL);
4286         free_page((unsigned long)crq->msgs);
4287         crq->msgs = NULL;
4288 }
4289
4290 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4291 {
4292         struct ibmvnic_crq_queue *crq = &adapter->crq;
4293         struct device *dev = &adapter->vdev->dev;
4294         struct vio_dev *vdev = adapter->vdev;
4295         int rc, retrc = -ENOMEM;
4296
4297         if (crq->msgs)
4298                 return 0;
4299
4300         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4301         /* Should we allocate more than one page? */
4302
4303         if (!crq->msgs)
4304                 return -ENOMEM;
4305
4306         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4307         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4308                                         DMA_BIDIRECTIONAL);
4309         if (dma_mapping_error(dev, crq->msg_token))
4310                 goto map_failed;
4311
4312         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4313                                 crq->msg_token, PAGE_SIZE);
4314
4315         if (rc == H_RESOURCE)
4316                 /* maybe kexecing and resource is busy. try a reset */
4317                 rc = ibmvnic_reset_crq(adapter);
4318         retrc = rc;
4319
4320         if (rc == H_CLOSED) {
4321                 dev_warn(dev, "Partner adapter not ready\n");
4322         } else if (rc) {
4323                 dev_warn(dev, "Error %d opening adapter\n", rc);
4324                 goto reg_crq_failed;
4325         }
4326
4327         retrc = 0;
4328
4329         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4330                      (unsigned long)adapter);
4331
4332         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4333         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4334                          adapter);
4335         if (rc) {
4336                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4337                         vdev->irq, rc);
4338                 goto req_irq_failed;
4339         }
4340
4341         rc = vio_enable_interrupts(vdev);
4342         if (rc) {
4343                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4344                 goto req_irq_failed;
4345         }
4346
4347         crq->cur = 0;
4348         spin_lock_init(&crq->lock);
4349
4350         return retrc;
4351
4352 req_irq_failed:
4353         tasklet_kill(&adapter->tasklet);
4354         do {
4355                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4356         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4357 reg_crq_failed:
4358         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4359 map_failed:
4360         free_page((unsigned long)crq->msgs);
4361         crq->msgs = NULL;
4362         return retrc;
4363 }
4364
4365 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4366 {
4367         struct device *dev = &adapter->vdev->dev;
4368         unsigned long timeout = msecs_to_jiffies(30000);
4369         u64 old_num_rx_queues, old_num_tx_queues;
4370         int rc;
4371
4372         if (adapter->resetting && !adapter->wait_for_reset) {
4373                 rc = ibmvnic_reset_crq(adapter);
4374                 if (!rc)
4375                         rc = vio_enable_interrupts(adapter->vdev);
4376         } else {
4377                 rc = init_crq_queue(adapter);
4378         }
4379
4380         if (rc) {
4381                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4382                 return rc;
4383         }
4384
4385         adapter->from_passive_init = false;
4386
4387         old_num_rx_queues = adapter->req_rx_queues;
4388         old_num_tx_queues = adapter->req_tx_queues;
4389
4390         init_completion(&adapter->init_done);
4391         adapter->init_done_rc = 0;
4392         ibmvnic_send_crq_init(adapter);
4393         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4394                 dev_err(dev, "Initialization sequence timed out\n");
4395                 return -1;
4396         }
4397
4398         if (adapter->init_done_rc) {
4399                 release_crq_queue(adapter);
4400                 return adapter->init_done_rc;
4401         }
4402
4403         if (adapter->from_passive_init) {
4404                 adapter->state = VNIC_OPEN;
4405                 adapter->from_passive_init = false;
4406                 return -1;
4407         }
4408
4409         if (adapter->resetting && !adapter->wait_for_reset) {
4410                 if (adapter->req_rx_queues != old_num_rx_queues ||
4411                     adapter->req_tx_queues != old_num_tx_queues) {
4412                         release_sub_crqs(adapter, 0);
4413                         rc = init_sub_crqs(adapter);
4414                 } else {
4415                         rc = reset_sub_crq_queues(adapter);
4416                 }
4417         } else {
4418                 rc = init_sub_crqs(adapter);
4419         }
4420
4421         if (rc) {
4422                 dev_err(dev, "Initialization of sub crqs failed\n");
4423                 release_crq_queue(adapter);
4424                 return rc;
4425         }
4426
4427         rc = init_sub_crq_irqs(adapter);
4428         if (rc) {
4429                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4430                 release_crq_queue(adapter);
4431         }
4432
4433         return rc;
4434 }
4435
4436 static struct device_attribute dev_attr_failover;
4437
4438 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4439 {
4440         struct ibmvnic_adapter *adapter;
4441         struct net_device *netdev;
4442         unsigned char *mac_addr_p;
4443         int rc;
4444
4445         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4446                 dev->unit_address);
4447
4448         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4449                                                         VETH_MAC_ADDR, NULL);
4450         if (!mac_addr_p) {
4451                 dev_err(&dev->dev,
4452                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4453                         __FILE__, __LINE__);
4454                 return 0;
4455         }
4456
4457         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4458                                    IBMVNIC_MAX_QUEUES);
4459         if (!netdev)
4460                 return -ENOMEM;
4461
4462         adapter = netdev_priv(netdev);
4463         adapter->state = VNIC_PROBING;
4464         dev_set_drvdata(&dev->dev, netdev);
4465         adapter->vdev = dev;
4466         adapter->netdev = netdev;
4467
4468         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4469         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4470         netdev->irq = dev->irq;
4471         netdev->netdev_ops = &ibmvnic_netdev_ops;
4472         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4473         SET_NETDEV_DEV(netdev, &dev->dev);
4474
4475         spin_lock_init(&adapter->stats_lock);
4476
4477         INIT_LIST_HEAD(&adapter->errors);
4478         spin_lock_init(&adapter->error_list_lock);
4479
4480         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4481         INIT_LIST_HEAD(&adapter->rwi_list);
4482         mutex_init(&adapter->reset_lock);
4483         mutex_init(&adapter->rwi_lock);
4484         adapter->resetting = false;
4485
4486         adapter->mac_change_pending = false;
4487
4488         do {
4489                 rc = ibmvnic_init(adapter);
4490                 if (rc && rc != EAGAIN)
4491                         goto ibmvnic_init_fail;
4492         } while (rc == EAGAIN);
4493
4494         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4495         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4496         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4497
4498         rc = device_create_file(&dev->dev, &dev_attr_failover);
4499         if (rc)
4500                 goto ibmvnic_init_fail;
4501
4502         netif_carrier_off(netdev);
4503         rc = register_netdev(netdev);
4504         if (rc) {
4505                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4506                 goto ibmvnic_register_fail;
4507         }
4508         dev_info(&dev->dev, "ibmvnic registered\n");
4509
4510         adapter->state = VNIC_PROBED;
4511
4512         adapter->wait_for_reset = false;
4513
4514         return 0;
4515
4516 ibmvnic_register_fail:
4517         device_remove_file(&dev->dev, &dev_attr_failover);
4518
4519 ibmvnic_init_fail:
4520         release_sub_crqs(adapter, 1);
4521         release_crq_queue(adapter);
4522         free_netdev(netdev);
4523
4524         return rc;
4525 }
4526
4527 static int ibmvnic_remove(struct vio_dev *dev)
4528 {
4529         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4530         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4531
4532         adapter->state = VNIC_REMOVING;
4533         unregister_netdev(netdev);
4534         mutex_lock(&adapter->reset_lock);
4535
4536         release_resources(adapter);
4537         release_sub_crqs(adapter, 1);
4538         release_crq_queue(adapter);
4539
4540         adapter->state = VNIC_REMOVED;
4541
4542         mutex_unlock(&adapter->reset_lock);
4543         device_remove_file(&dev->dev, &dev_attr_failover);
4544         free_netdev(netdev);
4545         dev_set_drvdata(&dev->dev, NULL);
4546
4547         return 0;
4548 }
4549
4550 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4551                               const char *buf, size_t count)
4552 {
4553         struct net_device *netdev = dev_get_drvdata(dev);
4554         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4555         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4556         __be64 session_token;
4557         long rc;
4558
4559         if (!sysfs_streq(buf, "1"))
4560                 return -EINVAL;
4561
4562         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4563                          H_GET_SESSION_TOKEN, 0, 0, 0);
4564         if (rc) {
4565                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4566                            rc);
4567                 return -EINVAL;
4568         }
4569
4570         session_token = (__be64)retbuf[0];
4571         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4572                    be64_to_cpu(session_token));
4573         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4574                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4575         if (rc) {
4576                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4577                            rc);
4578                 return -EINVAL;
4579         }
4580
4581         return count;
4582 }
4583
4584 static DEVICE_ATTR_WO(failover);
4585
4586 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4587 {
4588         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4589         struct ibmvnic_adapter *adapter;
4590         struct iommu_table *tbl;
4591         unsigned long ret = 0;
4592         int i;
4593
4594         tbl = get_iommu_table_base(&vdev->dev);
4595
4596         /* netdev inits at probe time along with the structures we need below*/
4597         if (!netdev)
4598                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4599
4600         adapter = netdev_priv(netdev);
4601
4602         ret += PAGE_SIZE; /* the crq message queue */
4603         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4604
4605         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4606                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4607
4608         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4609              i++)
4610                 ret += adapter->rx_pool[i].size *
4611                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4612
4613         return ret;
4614 }
4615
4616 static int ibmvnic_resume(struct device *dev)
4617 {
4618         struct net_device *netdev = dev_get_drvdata(dev);
4619         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4620
4621         if (adapter->state != VNIC_OPEN)
4622                 return 0;
4623
4624         tasklet_schedule(&adapter->tasklet);
4625
4626         return 0;
4627 }
4628
4629 static const struct vio_device_id ibmvnic_device_table[] = {
4630         {"network", "IBM,vnic"},
4631         {"", "" }
4632 };
4633 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4634
4635 static const struct dev_pm_ops ibmvnic_pm_ops = {
4636         .resume = ibmvnic_resume
4637 };
4638
4639 static struct vio_driver ibmvnic_driver = {
4640         .id_table       = ibmvnic_device_table,
4641         .probe          = ibmvnic_probe,
4642         .remove         = ibmvnic_remove,
4643         .get_desired_dma = ibmvnic_get_desired_dma,
4644         .name           = ibmvnic_driver_name,
4645         .pm             = &ibmvnic_pm_ops,
4646 };
4647
4648 /* module functions */
4649 static int __init ibmvnic_module_init(void)
4650 {
4651         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4652                 IBMVNIC_DRIVER_VERSION);
4653
4654         return vio_register_driver(&ibmvnic_driver);
4655 }
4656
4657 static void __exit ibmvnic_module_exit(void)
4658 {
4659         vio_unregister_driver(&ibmvnic_driver);
4660 }
4661
4662 module_init(ibmvnic_module_init);
4663 module_exit(ibmvnic_module_exit);