drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/if_arp.h>
  63 #include <linux/in.h>
  64 #include <linux/ip.h>
  65 #include <linux/ipv6.h>
  66 #include <linux/irq.h>
  67 #include <linux/kthread.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78 #include <linux/if_vlan.h>
  79 #include <linux/utsname.h>
  80
  81 #include "ibmvnic.h"
  82
  83 static const char ibmvnic_driver_name[] = "ibmvnic";
  84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  85
  86 MODULE_AUTHOR("Santiago Leon");
  87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  88 MODULE_LICENSE("GPL");
  89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  90
  91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  92 static int ibmvnic_remove(struct vio_dev *);
  93 static void release_sub_crqs(struct ibmvnic_adapter *);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 114 static void send_login(struct ibmvnic_adapter *adapter);
 115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 116 static int init_sub_crqs(struct ibmvnic_adapter *);
 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 118 static int ibmvnic_init(struct ibmvnic_adapter *);
 119 static void release_crq_queue(struct ibmvnic_adapter *);
 120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
 121
 122 struct ibmvnic_stat {
 123         char name[ETH_GSTRING_LEN];
 124         int offset;
 125 };
 126
 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 128                              offsetof(struct ibmvnic_statistics, stat))
 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 130
 131 static const struct ibmvnic_stat ibmvnic_stats[] = {
 132         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 133         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 134         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 135         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 136         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 137         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 138         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 139         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 140         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 141         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 142         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 143         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 144         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 145         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 146         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 147         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 148         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 149         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 150         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 151         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 152         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 153         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 154 };
 155
 156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 157                           unsigned long length, unsigned long *number,
 158                           unsigned long *irq)
 159 {
 160         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 161         long rc;
 162
 163         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 164         *number = retbuf[0];
 165         *irq = retbuf[1];
 166
 167         return rc;
 168 }
 169
 170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 171                                 struct ibmvnic_long_term_buff *ltb, int size)
 172 {
 173         struct device *dev = &adapter->vdev->dev;
 174
 175         ltb->size = size;
 176         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 177                                        GFP_KERNEL);
 178
 179         if (!ltb->buff) {
 180                 dev_err(dev, "Couldn't alloc long term buffer\n");
 181                 return -ENOMEM;
 182         }
 183         ltb->map_id = adapter->map_id;
 184         adapter->map_id++;
 185
 186         init_completion(&adapter->fw_done);
 187         send_request_map(adapter, ltb->addr,
 188                          ltb->size, ltb->map_id);
 189         wait_for_completion(&adapter->fw_done);
 190
 191         if (adapter->fw_done_rc) {
 192                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 193                         adapter->fw_done_rc);
 194                 return -1;
 195         }
 196         return 0;
 197 }
 198
 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 200                                 struct ibmvnic_long_term_buff *ltb)
 201 {
 202         struct device *dev = &adapter->vdev->dev;
 203
 204         if (!ltb->buff)
 205                 return;
 206
 207         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 208             adapter->reset_reason != VNIC_RESET_MOBILITY)
 209                 send_request_unmap(adapter, ltb->map_id);
 210         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 211 }
 212
 213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 214                                 struct ibmvnic_long_term_buff *ltb)
 215 {
 216         memset(ltb->buff, 0, ltb->size);
 217
 218         init_completion(&adapter->fw_done);
 219         send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 220         wait_for_completion(&adapter->fw_done);
 221
 222         if (adapter->fw_done_rc) {
 223                 dev_info(&adapter->vdev->dev,
 224                          "Reset failed, attempting to free and reallocate buffer\n");
 225                 free_long_term_buff(adapter, ltb);
 226                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 227         }
 228         return 0;
 229 }
 230
 231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 232 {
 233         int i;
 234
 235         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 236              i++)
 237                 adapter->rx_pool[i].active = 0;
 238 }
 239
 240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 241                               struct ibmvnic_rx_pool *pool)
 242 {
 243         int count = pool->size - atomic_read(&pool->available);
 244         struct device *dev = &adapter->vdev->dev;
 245         int buffers_added = 0;
 246         unsigned long lpar_rc;
 247         union sub_crq sub_crq;
 248         struct sk_buff *skb;
 249         unsigned int offset;
 250         dma_addr_t dma_addr;
 251         unsigned char *dst;
 252         u64 *handle_array;
 253         int shift = 0;
 254         int index;
 255         int i;
 256
 257         if (!pool->active)
 258                 return;
 259
 260         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 261                                       be32_to_cpu(adapter->login_rsp_buf->
 262                                       off_rxadd_subcrqs));
 263
 264         for (i = 0; i < count; ++i) {
 265                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 266                 if (!skb) {
 267                         dev_err(dev, "Couldn't replenish rx buff\n");
 268                         adapter->replenish_no_mem++;
 269                         break;
 270                 }
 271
 272                 index = pool->free_map[pool->next_free];
 273
 274                 if (pool->rx_buff[index].skb)
 275                         dev_err(dev, "Inconsistent free_map!\n");
 276
 277                 /* Copy the skb to the long term mapped DMA buffer */
 278                 offset = index * pool->buff_size;
 279                 dst = pool->long_term_buff.buff + offset;
 280                 memset(dst, 0, pool->buff_size);
 281                 dma_addr = pool->long_term_buff.addr + offset;
 282                 pool->rx_buff[index].data = dst;
 283
 284                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 285                 pool->rx_buff[index].dma = dma_addr;
 286                 pool->rx_buff[index].skb = skb;
 287                 pool->rx_buff[index].pool_index = pool->index;
 288                 pool->rx_buff[index].size = pool->buff_size;
 289
 290                 memset(&sub_crq, 0, sizeof(sub_crq));
 291                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 292                 sub_crq.rx_add.correlator =
 293                     cpu_to_be64((u64)&pool->rx_buff[index]);
 294                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 295                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 296
 297                 /* The length field of the sCRQ is defined to be 24 bits so the
 298                  * buffer size needs to be left shifted by a byte before it is
 299                  * converted to big endian to prevent the last byte from being
 300                  * truncated.
 301                  */
 302 #ifdef __LITTLE_ENDIAN__
 303                 shift = 8;
 304 #endif
 305                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 306
 307                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 308                                       &sub_crq);
 309                 if (lpar_rc != H_SUCCESS)
 310                         goto failure;
 311
 312                 buffers_added++;
 313                 adapter->replenish_add_buff_success++;
 314                 pool->next_free = (pool->next_free + 1) % pool->size;
 315         }
 316         atomic_add(buffers_added, &pool->available);
 317         return;
 318
 319 failure:
 320         dev_info(dev, "replenish pools failure\n");
 321         pool->free_map[pool->next_free] = index;
 322         pool->rx_buff[index].skb = NULL;
 323         if (!dma_mapping_error(dev, dma_addr))
 324                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 325                                  DMA_FROM_DEVICE);
 326
 327         dev_kfree_skb_any(skb);
 328         adapter->replenish_add_buff_failure++;
 329         atomic_add(buffers_added, &pool->available);
 330
 331         if (lpar_rc == H_CLOSED) {
 332                 /* Disable buffer pool replenishment and report carrier off if
 333                  * queue is closed. Firmware guarantees that a signal will
 334                  * be sent to the driver, triggering a reset.
 335                  */
 336                 deactivate_rx_pools(adapter);
 337                 netif_carrier_off(adapter->netdev);
 338         }
 339 }
 340
 341 static void replenish_pools(struct ibmvnic_adapter *adapter)
 342 {
 343         int i;
 344
 345         adapter->replenish_task_cycles++;
 346         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 347              i++) {
 348                 if (adapter->rx_pool[i].active)
 349                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 350         }
 351 }
 352
 353 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 354 {
 355         kfree(adapter->tx_stats_buffers);
 356         kfree(adapter->rx_stats_buffers);
 357         adapter->tx_stats_buffers = NULL;
 358         adapter->rx_stats_buffers = NULL;
 359 }
 360
 361 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 362 {
 363         adapter->tx_stats_buffers =
 364                                 kcalloc(adapter->req_tx_queues,
 365                                         sizeof(struct ibmvnic_tx_queue_stats),
 366                                         GFP_KERNEL);
 367         if (!adapter->tx_stats_buffers)
 368                 return -ENOMEM;
 369
 370         adapter->rx_stats_buffers =
 371                                 kcalloc(adapter->req_rx_queues,
 372                                         sizeof(struct ibmvnic_rx_queue_stats),
 373                                         GFP_KERNEL);
 374         if (!adapter->rx_stats_buffers)
 375                 return -ENOMEM;
 376
 377         return 0;
 378 }
 379
 380 static void release_stats_token(struct ibmvnic_adapter *adapter)
 381 {
 382         struct device *dev = &adapter->vdev->dev;
 383
 384         if (!adapter->stats_token)
 385                 return;
 386
 387         dma_unmap_single(dev, adapter->stats_token,
 388                          sizeof(struct ibmvnic_statistics),
 389                          DMA_FROM_DEVICE);
 390         adapter->stats_token = 0;
 391 }
 392
 393 static int init_stats_token(struct ibmvnic_adapter *adapter)
 394 {
 395         struct device *dev = &adapter->vdev->dev;
 396         dma_addr_t stok;
 397
 398         stok = dma_map_single(dev, &adapter->stats,
 399                               sizeof(struct ibmvnic_statistics),
 400                               DMA_FROM_DEVICE);
 401         if (dma_mapping_error(dev, stok)) {
 402                 dev_err(dev, "Couldn't map stats buffer\n");
 403                 return -1;
 404         }
 405
 406         adapter->stats_token = stok;
 407         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 408         return 0;
 409 }
 410
 411 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 412 {
 413         struct ibmvnic_rx_pool *rx_pool;
 414         int rx_scrqs;
 415         int i, j, rc;
 416         u64 *size_array;
 417
 418         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 419                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 420
 421         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 422         for (i = 0; i < rx_scrqs; i++) {
 423                 rx_pool = &adapter->rx_pool[i];
 424
 425                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 426
 427                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 428                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 429                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 430                         alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 431                                              rx_pool->size *
 432                                              rx_pool->buff_size);
 433                 } else {
 434                         rc = reset_long_term_buff(adapter,
 435                                                   &rx_pool->long_term_buff);
 436                 }
 437
 438                 if (rc)
 439                         return rc;
 440
 441                 for (j = 0; j < rx_pool->size; j++)
 442                         rx_pool->free_map[j] = j;
 443
 444                 memset(rx_pool->rx_buff, 0,
 445                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 446
 447                 atomic_set(&rx_pool->available, 0);
 448                 rx_pool->next_alloc = 0;
 449                 rx_pool->next_free = 0;
 450                 rx_pool->active = 1;
 451         }
 452
 453         return 0;
 454 }
 455
 456 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 457 {
 458         struct ibmvnic_rx_pool *rx_pool;
 459         int i, j;
 460
 461         if (!adapter->rx_pool)
 462                 return;
 463
 464         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 465                 rx_pool = &adapter->rx_pool[i];
 466
 467                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 468
 469                 kfree(rx_pool->free_map);
 470                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 471
 472                 if (!rx_pool->rx_buff)
 473                         continue;
 474
 475                 for (j = 0; j < rx_pool->size; j++) {
 476                         if (rx_pool->rx_buff[j].skb) {
 477                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 478                                 rx_pool->rx_buff[i].skb = NULL;
 479                         }
 480                 }
 481
 482                 kfree(rx_pool->rx_buff);
 483         }
 484
 485         kfree(adapter->rx_pool);
 486         adapter->rx_pool = NULL;
 487         adapter->num_active_rx_pools = 0;
 488 }
 489
 490 static int init_rx_pools(struct net_device *netdev)
 491 {
 492         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 493         struct device *dev = &adapter->vdev->dev;
 494         struct ibmvnic_rx_pool *rx_pool;
 495         int rxadd_subcrqs;
 496         u64 *size_array;
 497         int i, j;
 498
 499         rxadd_subcrqs =
 500                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 501         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 502                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 503
 504         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 505                                    sizeof(struct ibmvnic_rx_pool),
 506                                    GFP_KERNEL);
 507         if (!adapter->rx_pool) {
 508                 dev_err(dev, "Failed to allocate rx pools\n");
 509                 return -1;
 510         }
 511
 512         adapter->num_active_rx_pools = 0;
 513
 514         for (i = 0; i < rxadd_subcrqs; i++) {
 515                 rx_pool = &adapter->rx_pool[i];
 516
 517                 netdev_dbg(adapter->netdev,
 518                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 519                            i, adapter->req_rx_add_entries_per_subcrq,
 520                            be64_to_cpu(size_array[i]));
 521
 522                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 523                 rx_pool->index = i;
 524                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 525                 rx_pool->active = 1;
 526
 527                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 528                                             GFP_KERNEL);
 529                 if (!rx_pool->free_map) {
 530                         release_rx_pools(adapter);
 531                         return -1;
 532                 }
 533
 534                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 535                                            sizeof(struct ibmvnic_rx_buff),
 536                                            GFP_KERNEL);
 537                 if (!rx_pool->rx_buff) {
 538                         dev_err(dev, "Couldn't alloc rx buffers\n");
 539                         release_rx_pools(adapter);
 540                         return -1;
 541                 }
 542
 543                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 544                                          rx_pool->size * rx_pool->buff_size)) {
 545                         release_rx_pools(adapter);
 546                         return -1;
 547                 }
 548
 549                 for (j = 0; j < rx_pool->size; ++j)
 550                         rx_pool->free_map[j] = j;
 551
 552                 atomic_set(&rx_pool->available, 0);
 553                 rx_pool->next_alloc = 0;
 554                 rx_pool->next_free = 0;
 555         }
 556
 557         adapter->num_active_rx_pools = rxadd_subcrqs;
 558
 559         return 0;
 560 }
 561
 562 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 563 {
 564         struct ibmvnic_tx_pool *tx_pool;
 565         int tx_scrqs;
 566         int i, j, rc;
 567
 568         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 569         for (i = 0; i < tx_scrqs; i++) {
 570                 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
 571
 572                 tx_pool = &adapter->tx_pool[i];
 573
 574                 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 575                 if (rc)
 576                         return rc;
 577
 578                 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
 579                 if (rc)
 580                         return rc;
 581
 582                 memset(tx_pool->tx_buff, 0,
 583                        adapter->req_tx_entries_per_subcrq *
 584                        sizeof(struct ibmvnic_tx_buff));
 585
 586                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 587                         tx_pool->free_map[j] = j;
 588
 589                 tx_pool->consumer_index = 0;
 590                 tx_pool->producer_index = 0;
 591                 tx_pool->tso_index = 0;
 592         }
 593
 594         return 0;
 595 }
 596
 597 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 598 {
 599         if (!adapter->vpd)
 600                 return;
 601
 602         kfree(adapter->vpd->buff);
 603         kfree(adapter->vpd);
 604
 605         adapter->vpd = NULL;
 606 }
 607
 608 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 609 {
 610         struct ibmvnic_tx_pool *tx_pool;
 611         int i;
 612
 613         if (!adapter->tx_pool)
 614                 return;
 615
 616         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 617                 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
 618                 tx_pool = &adapter->tx_pool[i];
 619                 kfree(tx_pool->tx_buff);
 620                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 621                 free_long_term_buff(adapter, &tx_pool->tso_ltb);
 622                 kfree(tx_pool->free_map);
 623         }
 624
 625         kfree(adapter->tx_pool);
 626         adapter->tx_pool = NULL;
 627         adapter->num_active_tx_pools = 0;
 628 }
 629
 630 static int init_tx_pools(struct net_device *netdev)
 631 {
 632         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 633         struct device *dev = &adapter->vdev->dev;
 634         struct ibmvnic_tx_pool *tx_pool;
 635         int tx_subcrqs;
 636         int i, j;
 637
 638         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 639         adapter->tx_pool = kcalloc(tx_subcrqs,
 640                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 641         if (!adapter->tx_pool)
 642                 return -1;
 643
 644         adapter->num_active_tx_pools = 0;
 645
 646         for (i = 0; i < tx_subcrqs; i++) {
 647                 tx_pool = &adapter->tx_pool[i];
 648
 649                 netdev_dbg(adapter->netdev,
 650                            "Initializing tx_pool[%d], %lld buffs\n",
 651                            i, adapter->req_tx_entries_per_subcrq);
 652
 653                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 654                                            sizeof(struct ibmvnic_tx_buff),
 655                                            GFP_KERNEL);
 656                 if (!tx_pool->tx_buff) {
 657                         dev_err(dev, "tx pool buffer allocation failed\n");
 658                         release_tx_pools(adapter);
 659                         return -1;
 660                 }
 661
 662                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 663                                          adapter->req_tx_entries_per_subcrq *
 664                                          adapter->req_mtu)) {
 665                         release_tx_pools(adapter);
 666                         return -1;
 667                 }
 668
 669                 /* alloc TSO ltb */
 670                 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
 671                                          IBMVNIC_TSO_BUFS *
 672                                          IBMVNIC_TSO_BUF_SZ)) {
 673                         release_tx_pools(adapter);
 674                         return -1;
 675                 }
 676
 677                 tx_pool->tso_index = 0;
 678
 679                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 680                                             sizeof(int), GFP_KERNEL);
 681                 if (!tx_pool->free_map) {
 682                         release_tx_pools(adapter);
 683                         return -1;
 684                 }
 685
 686                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 687                         tx_pool->free_map[j] = j;
 688
 689                 tx_pool->consumer_index = 0;
 690                 tx_pool->producer_index = 0;
 691         }
 692
 693         adapter->num_active_tx_pools = tx_subcrqs;
 694
 695         return 0;
 696 }
 697
 698 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 699 {
 700         struct device *dev = &adapter->vdev->dev;
 701         struct ibmvnic_error_buff *error_buff, *tmp;
 702         unsigned long flags;
 703
 704         spin_lock_irqsave(&adapter->error_list_lock, flags);
 705         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 706                 list_del(&error_buff->list);
 707                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 708                                  DMA_FROM_DEVICE);
 709                 kfree(error_buff->buff);
 710                 kfree(error_buff);
 711         }
 712         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 713 }
 714
 715 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 716 {
 717         int i;
 718
 719         if (adapter->napi_enabled)
 720                 return;
 721
 722         for (i = 0; i < adapter->req_rx_queues; i++)
 723                 napi_enable(&adapter->napi[i]);
 724
 725         adapter->napi_enabled = true;
 726 }
 727
 728 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 729 {
 730         int i;
 731
 732         if (!adapter->napi_enabled)
 733                 return;
 734
 735         for (i = 0; i < adapter->req_rx_queues; i++) {
 736                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 737                 napi_disable(&adapter->napi[i]);
 738         }
 739
 740         adapter->napi_enabled = false;
 741 }
 742
 743 static int ibmvnic_login(struct net_device *netdev)
 744 {
 745         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 746         unsigned long timeout = msecs_to_jiffies(30000);
 747         struct device *dev = &adapter->vdev->dev;
 748         int rc;
 749
 750         do {
 751                 if (adapter->renegotiate) {
 752                         adapter->renegotiate = false;
 753                         release_sub_crqs(adapter);
 754
 755                         reinit_completion(&adapter->init_done);
 756                         send_cap_queries(adapter);
 757                         if (!wait_for_completion_timeout(&adapter->init_done,
 758                                                          timeout)) {
 759                                 dev_err(dev, "Capabilities query timeout\n");
 760                                 return -1;
 761                         }
 762                         rc = init_sub_crqs(adapter);
 763                         if (rc) {
 764                                 dev_err(dev,
 765                                         "Initialization of SCRQ's failed\n");
 766                                 return -1;
 767                         }
 768                         rc = init_sub_crq_irqs(adapter);
 769                         if (rc) {
 770                                 dev_err(dev,
 771                                         "Initialization of SCRQ's irqs failed\n");
 772                                 return -1;
 773                         }
 774                 }
 775
 776                 reinit_completion(&adapter->init_done);
 777                 send_login(adapter);
 778                 if (!wait_for_completion_timeout(&adapter->init_done,
 779                                                  timeout)) {
 780                         dev_err(dev, "Login timeout\n");
 781                         return -1;
 782                 }
 783         } while (adapter->renegotiate);
 784
 785         /* handle pending MAC address changes after successful login */
 786         if (adapter->mac_change_pending) {
 787                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 788                 adapter->mac_change_pending = false;
 789         }
 790
 791         return 0;
 792 }
 793
 794 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 795 {
 796         kfree(adapter->login_buf);
 797         adapter->login_buf = NULL;
 798 }
 799
 800 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 801 {
 802         kfree(adapter->login_rsp_buf);
 803         adapter->login_rsp_buf = NULL;
 804 }
 805
 806 static void release_resources(struct ibmvnic_adapter *adapter)
 807 {
 808         int i;
 809
 810         release_vpd_data(adapter);
 811
 812         release_tx_pools(adapter);
 813         release_rx_pools(adapter);
 814
 815         release_stats_token(adapter);
 816         release_stats_buffers(adapter);
 817         release_error_buffers(adapter);
 818
 819         if (adapter->napi) {
 820                 for (i = 0; i < adapter->req_rx_queues; i++) {
 821                         if (&adapter->napi[i]) {
 822                                 netdev_dbg(adapter->netdev,
 823                                            "Releasing napi[%d]\n", i);
 824                                 netif_napi_del(&adapter->napi[i]);
 825                         }
 826                 }
 827         }
 828         kfree(adapter->napi);
 829         adapter->napi = NULL;
 830
 831         release_login_rsp_buffer(adapter);
 832 }
 833
 834 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 835 {
 836         struct net_device *netdev = adapter->netdev;
 837         unsigned long timeout = msecs_to_jiffies(30000);
 838         union ibmvnic_crq crq;
 839         bool resend;
 840         int rc;
 841
 842         netdev_dbg(netdev, "setting link state %d\n", link_state);
 843
 844         memset(&crq, 0, sizeof(crq));
 845         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 846         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 847         crq.logical_link_state.link_state = link_state;
 848
 849         do {
 850                 resend = false;
 851
 852                 reinit_completion(&adapter->init_done);
 853                 rc = ibmvnic_send_crq(adapter, &crq);
 854                 if (rc) {
 855                         netdev_err(netdev, "Failed to set link state\n");
 856                         return rc;
 857                 }
 858
 859                 if (!wait_for_completion_timeout(&adapter->init_done,
 860                                                  timeout)) {
 861                         netdev_err(netdev, "timeout setting link state\n");
 862                         return -1;
 863                 }
 864
 865                 if (adapter->init_done_rc == 1) {
 866                         /* Partuial success, delay and re-send */
 867                         mdelay(1000);
 868                         resend = true;
 869                 }
 870         } while (resend);
 871
 872         return 0;
 873 }
 874
 875 static int set_real_num_queues(struct net_device *netdev)
 876 {
 877         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 878         int rc;
 879
 880         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 881                    adapter->req_tx_queues, adapter->req_rx_queues);
 882
 883         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 884         if (rc) {
 885                 netdev_err(netdev, "failed to set the number of tx queues\n");
 886                 return rc;
 887         }
 888
 889         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 890         if (rc)
 891                 netdev_err(netdev, "failed to set the number of rx queues\n");
 892
 893         return rc;
 894 }
 895
 896 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 897 {
 898         struct device *dev = &adapter->vdev->dev;
 899         union ibmvnic_crq crq;
 900         int len = 0;
 901
 902         if (adapter->vpd->buff)
 903                 len = adapter->vpd->len;
 904
 905         init_completion(&adapter->fw_done);
 906         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 907         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 908         ibmvnic_send_crq(adapter, &crq);
 909         wait_for_completion(&adapter->fw_done);
 910
 911         if (!adapter->vpd->len)
 912                 return -ENODATA;
 913
 914         if (!adapter->vpd->buff)
 915                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 916         else if (adapter->vpd->len != len)
 917                 adapter->vpd->buff =
 918                         krealloc(adapter->vpd->buff,
 919                                  adapter->vpd->len, GFP_KERNEL);
 920
 921         if (!adapter->vpd->buff) {
 922                 dev_err(dev, "Could allocate VPD buffer\n");
 923                 return -ENOMEM;
 924         }
 925
 926         adapter->vpd->dma_addr =
 927                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 928                                DMA_FROM_DEVICE);
 929         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 930                 dev_err(dev, "Could not map VPD buffer\n");
 931                 kfree(adapter->vpd->buff);
 932                 adapter->vpd->buff = NULL;
 933                 return -ENOMEM;
 934         }
 935
 936         reinit_completion(&adapter->fw_done);
 937         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 938         crq.get_vpd.cmd = GET_VPD;
 939         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 940         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
 941         ibmvnic_send_crq(adapter, &crq);
 942         wait_for_completion(&adapter->fw_done);
 943
 944         return 0;
 945 }
 946
 947 static int init_resources(struct ibmvnic_adapter *adapter)
 948 {
 949         struct net_device *netdev = adapter->netdev;
 950         int i, rc;
 951
 952         rc = set_real_num_queues(netdev);
 953         if (rc)
 954                 return rc;
 955
 956         rc = init_stats_buffers(adapter);
 957         if (rc)
 958                 return rc;
 959
 960         rc = init_stats_token(adapter);
 961         if (rc)
 962                 return rc;
 963
 964         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
 965         if (!adapter->vpd)
 966                 return -ENOMEM;
 967
 968         /* Vital Product Data (VPD) */
 969         rc = ibmvnic_get_vpd(adapter);
 970         if (rc) {
 971                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
 972                 return rc;
 973         }
 974
 975         adapter->map_id = 1;
 976         adapter->napi = kcalloc(adapter->req_rx_queues,
 977                                 sizeof(struct napi_struct), GFP_KERNEL);
 978         if (!adapter->napi)
 979                 return -ENOMEM;
 980
 981         for (i = 0; i < adapter->req_rx_queues; i++) {
 982                 netdev_dbg(netdev, "Adding napi[%d]\n", i);
 983                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 984                                NAPI_POLL_WEIGHT);
 985         }
 986
 987         send_map_query(adapter);
 988
 989         rc = init_rx_pools(netdev);
 990         if (rc)
 991                 return rc;
 992
 993         rc = init_tx_pools(netdev);
 994         return rc;
 995 }
 996
 997 static int __ibmvnic_open(struct net_device *netdev)
 998 {
 999         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1000         enum vnic_state prev_state = adapter->state;
1001         int i, rc;
1002
1003         adapter->state = VNIC_OPENING;
1004         replenish_pools(adapter);
1005         ibmvnic_napi_enable(adapter);
1006
1007         /* We're ready to receive frames, enable the sub-crq interrupts and
1008          * set the logical link state to up
1009          */
1010         for (i = 0; i < adapter->req_rx_queues; i++) {
1011                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1012                 if (prev_state == VNIC_CLOSED)
1013                         enable_irq(adapter->rx_scrq[i]->irq);
1014                 else
1015                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1016         }
1017
1018         for (i = 0; i < adapter->req_tx_queues; i++) {
1019                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1020                 if (prev_state == VNIC_CLOSED)
1021                         enable_irq(adapter->tx_scrq[i]->irq);
1022                 else
1023                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1024         }
1025
1026         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1027         if (rc) {
1028                 for (i = 0; i < adapter->req_rx_queues; i++)
1029                         napi_disable(&adapter->napi[i]);
1030                 release_resources(adapter);
1031                 return rc;
1032         }
1033
1034         netif_tx_start_all_queues(netdev);
1035
1036         if (prev_state == VNIC_CLOSED) {
1037                 for (i = 0; i < adapter->req_rx_queues; i++)
1038                         napi_schedule(&adapter->napi[i]);
1039         }
1040
1041         adapter->state = VNIC_OPEN;
1042         return rc;
1043 }
1044
1045 static int ibmvnic_open(struct net_device *netdev)
1046 {
1047         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1048         int rc;
1049
1050         mutex_lock(&adapter->reset_lock);
1051
1052         if (adapter->state != VNIC_CLOSED) {
1053                 rc = ibmvnic_login(netdev);
1054                 if (rc) {
1055                         mutex_unlock(&adapter->reset_lock);
1056                         return rc;
1057                 }
1058
1059                 rc = init_resources(adapter);
1060                 if (rc) {
1061                         netdev_err(netdev, "failed to initialize resources\n");
1062                         release_resources(adapter);
1063                         mutex_unlock(&adapter->reset_lock);
1064                         return rc;
1065                 }
1066         }
1067
1068         rc = __ibmvnic_open(netdev);
1069         netif_carrier_on(netdev);
1070
1071         mutex_unlock(&adapter->reset_lock);
1072
1073         return rc;
1074 }
1075
1076 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1077 {
1078         struct ibmvnic_rx_pool *rx_pool;
1079         u64 rx_entries;
1080         int rx_scrqs;
1081         int i, j;
1082
1083         if (!adapter->rx_pool)
1084                 return;
1085
1086         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
1087         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1088
1089         /* Free any remaining skbs in the rx buffer pools */
1090         for (i = 0; i < rx_scrqs; i++) {
1091                 rx_pool = &adapter->rx_pool[i];
1092                 if (!rx_pool)
1093                         continue;
1094
1095                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1096                 for (j = 0; j < rx_entries; j++) {
1097                         if (rx_pool->rx_buff[j].skb) {
1098                                 dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
1099                                 rx_pool->rx_buff[j].skb = NULL;
1100                         }
1101                 }
1102         }
1103 }
1104
1105 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1106 {
1107         struct ibmvnic_tx_pool *tx_pool;
1108         u64 tx_entries;
1109         int tx_scrqs;
1110         int i, j;
1111
1112         if (!adapter->tx_pool)
1113                 return;
1114
1115         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1116         tx_entries = adapter->req_tx_entries_per_subcrq;
1117
1118         /* Free any remaining skbs in the tx buffer pools */
1119         for (i = 0; i < tx_scrqs; i++) {
1120                 tx_pool = &adapter->tx_pool[i];
1121                 if (!tx_pool)
1122                         continue;
1123
1124                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1125                 for (j = 0; j < tx_entries; j++) {
1126                         if (tx_pool->tx_buff[j].skb) {
1127                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1128                                 tx_pool->tx_buff[j].skb = NULL;
1129                         }
1130                 }
1131         }
1132 }
1133
1134 static int __ibmvnic_close(struct net_device *netdev)
1135 {
1136         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1137         int rc = 0;
1138         int i;
1139
1140         adapter->state = VNIC_CLOSING;
1141
1142         /* ensure that transmissions are stopped if called by do_reset */
1143         if (adapter->resetting)
1144                 netif_tx_disable(netdev);
1145         else
1146                 netif_tx_stop_all_queues(netdev);
1147
1148         ibmvnic_napi_disable(adapter);
1149
1150         if (adapter->tx_scrq) {
1151                 for (i = 0; i < adapter->req_tx_queues; i++)
1152                         if (adapter->tx_scrq[i]->irq) {
1153                                 netdev_dbg(adapter->netdev,
1154                                            "Disabling tx_scrq[%d] irq\n", i);
1155                                 disable_irq(adapter->tx_scrq[i]->irq);
1156                         }
1157         }
1158
1159         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1160         if (rc)
1161                 return rc;
1162
1163         if (adapter->rx_scrq) {
1164                 for (i = 0; i < adapter->req_rx_queues; i++) {
1165                         int retries = 10;
1166
1167                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1168                                 retries--;
1169                                 mdelay(100);
1170
1171                                 if (retries == 0)
1172                                         break;
1173                         }
1174
1175                         if (adapter->rx_scrq[i]->irq) {
1176                                 netdev_dbg(adapter->netdev,
1177                                            "Disabling rx_scrq[%d] irq\n", i);
1178                                 disable_irq(adapter->rx_scrq[i]->irq);
1179                         }
1180                 }
1181         }
1182         clean_rx_pools(adapter);
1183         clean_tx_pools(adapter);
1184         adapter->state = VNIC_CLOSED;
1185         return rc;
1186 }
1187
1188 static int ibmvnic_close(struct net_device *netdev)
1189 {
1190         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1191         int rc;
1192
1193         mutex_lock(&adapter->reset_lock);
1194         rc = __ibmvnic_close(netdev);
1195         mutex_unlock(&adapter->reset_lock);
1196
1197         return rc;
1198 }
1199
1200 /**
1201  * build_hdr_data - creates L2/L3/L4 header data buffer
1202  * @hdr_field - bitfield determining needed headers
1203  * @skb - socket buffer
1204  * @hdr_len - array of header lengths
1205  * @tot_len - total length of data
1206  *
1207  * Reads hdr_field to determine which headers are needed by firmware.
1208  * Builds a buffer containing these headers.  Saves individual header
1209  * lengths and total buffer length to be used to build descriptors.
1210  */
1211 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1212                           int *hdr_len, u8 *hdr_data)
1213 {
1214         int len = 0;
1215         u8 *hdr;
1216
1217         hdr_len[0] = sizeof(struct ethhdr);
1218
1219         if (skb->protocol == htons(ETH_P_IP)) {
1220                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1221                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1222                         hdr_len[2] = tcp_hdrlen(skb);
1223                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1224                         hdr_len[2] = sizeof(struct udphdr);
1225         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1226                 hdr_len[1] = sizeof(struct ipv6hdr);
1227                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1228                         hdr_len[2] = tcp_hdrlen(skb);
1229                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1230                         hdr_len[2] = sizeof(struct udphdr);
1231         } else if (skb->protocol == htons(ETH_P_ARP)) {
1232                 hdr_len[1] = arp_hdr_len(skb->dev);
1233                 hdr_len[2] = 0;
1234         }
1235
1236         memset(hdr_data, 0, 120);
1237         if ((hdr_field >> 6) & 1) {
1238                 hdr = skb_mac_header(skb);
1239                 memcpy(hdr_data, hdr, hdr_len[0]);
1240                 len += hdr_len[0];
1241         }
1242
1243         if ((hdr_field >> 5) & 1) {
1244                 hdr = skb_network_header(skb);
1245                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1246                 len += hdr_len[1];
1247         }
1248
1249         if ((hdr_field >> 4) & 1) {
1250                 hdr = skb_transport_header(skb);
1251                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1252                 len += hdr_len[2];
1253         }
1254         return len;
1255 }
1256
1257 /**
1258  * create_hdr_descs - create header and header extension descriptors
1259  * @hdr_field - bitfield determining needed headers
1260  * @data - buffer containing header data
1261  * @len - length of data buffer
1262  * @hdr_len - array of individual header lengths
1263  * @scrq_arr - descriptor array
1264  *
1265  * Creates header and, if needed, header extension descriptors and
1266  * places them in a descriptor array, scrq_arr
1267  */
1268
1269 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1270                             union sub_crq *scrq_arr)
1271 {
1272         union sub_crq hdr_desc;
1273         int tmp_len = len;
1274         int num_descs = 0;
1275         u8 *data, *cur;
1276         int tmp;
1277
1278         while (tmp_len > 0) {
1279                 cur = hdr_data + len - tmp_len;
1280
1281                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1282                 if (cur != hdr_data) {
1283                         data = hdr_desc.hdr_ext.data;
1284                         tmp = tmp_len > 29 ? 29 : tmp_len;
1285                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1286                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1287                         hdr_desc.hdr_ext.len = tmp;
1288                 } else {
1289                         data = hdr_desc.hdr.data;
1290                         tmp = tmp_len > 24 ? 24 : tmp_len;
1291                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1292                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1293                         hdr_desc.hdr.len = tmp;
1294                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1295                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1296                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1297                         hdr_desc.hdr.flag = hdr_field << 1;
1298                 }
1299                 memcpy(data, cur, tmp);
1300                 tmp_len -= tmp;
1301                 *scrq_arr = hdr_desc;
1302                 scrq_arr++;
1303                 num_descs++;
1304         }
1305
1306         return num_descs;
1307 }
1308
1309 /**
1310  * build_hdr_descs_arr - build a header descriptor array
1311  * @skb - socket buffer
1312  * @num_entries - number of descriptors to be sent
1313  * @subcrq - first TX descriptor
1314  * @hdr_field - bit field determining which headers will be sent
1315  *
1316  * This function will build a TX descriptor array with applicable
1317  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1318  */
1319
1320 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1321                                 int *num_entries, u8 hdr_field)
1322 {
1323         int hdr_len[3] = {0, 0, 0};
1324         int tot_len;
1325         u8 *hdr_data = txbuff->hdr_data;
1326
1327         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1328                                  txbuff->hdr_data);
1329         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1330                          txbuff->indir_arr + 1);
1331 }
1332
1333 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1334 {
1335         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1336         int queue_num = skb_get_queue_mapping(skb);
1337         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1338         struct device *dev = &adapter->vdev->dev;
1339         struct ibmvnic_tx_buff *tx_buff = NULL;
1340         struct ibmvnic_sub_crq_queue *tx_scrq;
1341         struct ibmvnic_tx_pool *tx_pool;
1342         unsigned int tx_send_failed = 0;
1343         unsigned int tx_map_failed = 0;
1344         unsigned int tx_dropped = 0;
1345         unsigned int tx_packets = 0;
1346         unsigned int tx_bytes = 0;
1347         dma_addr_t data_dma_addr;
1348         struct netdev_queue *txq;
1349         unsigned long lpar_rc;
1350         union sub_crq tx_crq;
1351         unsigned int offset;
1352         int num_entries = 1;
1353         unsigned char *dst;
1354         u64 *handle_array;
1355         int index = 0;
1356         u8 proto = 0;
1357         int ret = 0;
1358
1359         if (adapter->resetting) {
1360                 if (!netif_subqueue_stopped(netdev, skb))
1361                         netif_stop_subqueue(netdev, queue_num);
1362                 dev_kfree_skb_any(skb);
1363
1364                 tx_send_failed++;
1365                 tx_dropped++;
1366                 ret = NETDEV_TX_OK;
1367                 goto out;
1368         }
1369
1370         tx_pool = &adapter->tx_pool[queue_num];
1371         tx_scrq = adapter->tx_scrq[queue_num];
1372         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1373         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1374                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1375
1376         index = tx_pool->free_map[tx_pool->consumer_index];
1377
1378         if (skb_is_gso(skb)) {
1379                 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1380                 dst = tx_pool->tso_ltb.buff + offset;
1381                 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1382                 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1383                 tx_pool->tso_index++;
1384                 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1385                         tx_pool->tso_index = 0;
1386         } else {
1387                 offset = index * adapter->req_mtu;
1388                 dst = tx_pool->long_term_buff.buff + offset;
1389                 memset(dst, 0, adapter->req_mtu);
1390                 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1391         }
1392
1393         if (skb_shinfo(skb)->nr_frags) {
1394                 int cur, i;
1395
1396                 /* Copy the head */
1397                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1398                 cur = skb_headlen(skb);
1399
1400                 /* Copy the frags */
1401                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1402                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1403
1404                         memcpy(dst + cur,
1405                                page_address(skb_frag_page(frag)) +
1406                                frag->page_offset, skb_frag_size(frag));
1407                         cur += skb_frag_size(frag);
1408                 }
1409         } else {
1410                 skb_copy_from_linear_data(skb, dst, skb->len);
1411         }
1412
1413         tx_pool->consumer_index =
1414             (tx_pool->consumer_index + 1) %
1415                 adapter->req_tx_entries_per_subcrq;
1416
1417         tx_buff = &tx_pool->tx_buff[index];
1418         tx_buff->skb = skb;
1419         tx_buff->data_dma[0] = data_dma_addr;
1420         tx_buff->data_len[0] = skb->len;
1421         tx_buff->index = index;
1422         tx_buff->pool_index = queue_num;
1423         tx_buff->last_frag = true;
1424
1425         memset(&tx_crq, 0, sizeof(tx_crq));
1426         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1427         tx_crq.v1.type = IBMVNIC_TX_DESC;
1428         tx_crq.v1.n_crq_elem = 1;
1429         tx_crq.v1.n_sge = 1;
1430         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1431         tx_crq.v1.correlator = cpu_to_be32(index);
1432         if (skb_is_gso(skb))
1433                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1434         else
1435                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1436         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1437         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1438
1439         if (adapter->vlan_header_insertion) {
1440                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1441                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1442         }
1443
1444         if (skb->protocol == htons(ETH_P_IP)) {
1445                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1446                 proto = ip_hdr(skb)->protocol;
1447         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1448                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1449                 proto = ipv6_hdr(skb)->nexthdr;
1450         }
1451
1452         if (proto == IPPROTO_TCP)
1453                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1454         else if (proto == IPPROTO_UDP)
1455                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1456
1457         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1458                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1459                 hdrs += 2;
1460         }
1461         if (skb_is_gso(skb)) {
1462                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1463                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1464                 hdrs += 2;
1465         }
1466         /* determine if l2/3/4 headers are sent to firmware */
1467         if ((*hdrs >> 7) & 1) {
1468                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1469                 tx_crq.v1.n_crq_elem = num_entries;
1470                 tx_buff->indir_arr[0] = tx_crq;
1471                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1472                                                     sizeof(tx_buff->indir_arr),
1473                                                     DMA_TO_DEVICE);
1474                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1475                         dev_kfree_skb_any(skb);
1476                         tx_buff->skb = NULL;
1477                         if (!firmware_has_feature(FW_FEATURE_CMO))
1478                                 dev_err(dev, "tx: unable to map descriptor array\n");
1479                         tx_map_failed++;
1480                         tx_dropped++;
1481                         ret = NETDEV_TX_OK;
1482                         goto out;
1483                 }
1484                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1485                                                (u64)tx_buff->indir_dma,
1486                                                (u64)num_entries);
1487         } else {
1488                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1489                                       &tx_crq);
1490         }
1491         if (lpar_rc != H_SUCCESS) {
1492                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1493
1494                 if (tx_pool->consumer_index == 0)
1495                         tx_pool->consumer_index =
1496                                 adapter->req_tx_entries_per_subcrq - 1;
1497                 else
1498                         tx_pool->consumer_index--;
1499
1500                 dev_kfree_skb_any(skb);
1501                 tx_buff->skb = NULL;
1502
1503                 if (lpar_rc == H_CLOSED) {
1504                         /* Disable TX and report carrier off if queue is closed.
1505                          * Firmware guarantees that a signal will be sent to the
1506                          * driver, triggering a reset or some other action.
1507                          */
1508                         netif_tx_stop_all_queues(netdev);
1509                         netif_carrier_off(netdev);
1510                 }
1511
1512                 tx_send_failed++;
1513                 tx_dropped++;
1514                 ret = NETDEV_TX_OK;
1515                 goto out;
1516         }
1517
1518         if (atomic_inc_return(&tx_scrq->used)
1519                                         >= adapter->req_tx_entries_per_subcrq) {
1520                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1521                 netif_stop_subqueue(netdev, queue_num);
1522         }
1523
1524         tx_packets++;
1525         tx_bytes += skb->len;
1526         txq->trans_start = jiffies;
1527         ret = NETDEV_TX_OK;
1528
1529 out:
1530         netdev->stats.tx_dropped += tx_dropped;
1531         netdev->stats.tx_bytes += tx_bytes;
1532         netdev->stats.tx_packets += tx_packets;
1533         adapter->tx_send_failed += tx_send_failed;
1534         adapter->tx_map_failed += tx_map_failed;
1535         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1536         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1537         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1538
1539         return ret;
1540 }
1541
1542 static void ibmvnic_set_multi(struct net_device *netdev)
1543 {
1544         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1545         struct netdev_hw_addr *ha;
1546         union ibmvnic_crq crq;
1547
1548         memset(&crq, 0, sizeof(crq));
1549         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1550         crq.request_capability.cmd = REQUEST_CAPABILITY;
1551
1552         if (netdev->flags & IFF_PROMISC) {
1553                 if (!adapter->promisc_supported)
1554                         return;
1555         } else {
1556                 if (netdev->flags & IFF_ALLMULTI) {
1557                         /* Accept all multicast */
1558                         memset(&crq, 0, sizeof(crq));
1559                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1560                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1561                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1562                         ibmvnic_send_crq(adapter, &crq);
1563                 } else if (netdev_mc_empty(netdev)) {
1564                         /* Reject all multicast */
1565                         memset(&crq, 0, sizeof(crq));
1566                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1567                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1568                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1569                         ibmvnic_send_crq(adapter, &crq);
1570                 } else {
1571                         /* Accept one or more multicast(s) */
1572                         netdev_for_each_mc_addr(ha, netdev) {
1573                                 memset(&crq, 0, sizeof(crq));
1574                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1575                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1576                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1577                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1578                                                 ha->addr);
1579                                 ibmvnic_send_crq(adapter, &crq);
1580                         }
1581                 }
1582         }
1583 }
1584
1585 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1586 {
1587         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1588         struct sockaddr *addr = p;
1589         union ibmvnic_crq crq;
1590
1591         if (!is_valid_ether_addr(addr->sa_data))
1592                 return -EADDRNOTAVAIL;
1593
1594         memset(&crq, 0, sizeof(crq));
1595         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1596         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1597         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1598
1599         init_completion(&adapter->fw_done);
1600         ibmvnic_send_crq(adapter, &crq);
1601         wait_for_completion(&adapter->fw_done);
1602         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1603         return adapter->fw_done_rc ? -EIO : 0;
1604 }
1605
1606 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1607 {
1608         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1609         struct sockaddr *addr = p;
1610         int rc;
1611
1612         if (adapter->state == VNIC_PROBED) {
1613                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1614                 adapter->mac_change_pending = true;
1615                 return 0;
1616         }
1617
1618         rc = __ibmvnic_set_mac(netdev, addr);
1619
1620         return rc;
1621 }
1622
1623 /**
1624  * do_reset returns zero if we are able to keep processing reset events, or
1625  * non-zero if we hit a fatal error and must halt.
1626  */
1627 static int do_reset(struct ibmvnic_adapter *adapter,
1628                     struct ibmvnic_rwi *rwi, u32 reset_state)
1629 {
1630         u64 old_num_rx_queues, old_num_tx_queues;
1631         struct net_device *netdev = adapter->netdev;
1632         int i, rc;
1633
1634         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1635                    rwi->reset_reason);
1636
1637         netif_carrier_off(netdev);
1638         adapter->reset_reason = rwi->reset_reason;
1639
1640         old_num_rx_queues = adapter->req_rx_queues;
1641         old_num_tx_queues = adapter->req_tx_queues;
1642
1643         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1644                 rc = ibmvnic_reenable_crq_queue(adapter);
1645                 if (rc)
1646                         return 0;
1647         }
1648
1649         rc = __ibmvnic_close(netdev);
1650         if (rc)
1651                 return rc;
1652
1653         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1654             adapter->wait_for_reset) {
1655                 release_resources(adapter);
1656                 release_sub_crqs(adapter);
1657                 release_crq_queue(adapter);
1658         }
1659
1660         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1661                 /* remove the closed state so when we call open it appears
1662                  * we are coming from the probed state.
1663                  */
1664                 adapter->state = VNIC_PROBED;
1665
1666                 rc = ibmvnic_init(adapter);
1667                 if (rc)
1668                         return IBMVNIC_INIT_FAILED;
1669
1670                 /* If the adapter was in PROBE state prior to the reset,
1671                  * exit here.
1672                  */
1673                 if (reset_state == VNIC_PROBED)
1674                         return 0;
1675
1676                 rc = ibmvnic_login(netdev);
1677                 if (rc) {
1678                         adapter->state = VNIC_PROBED;
1679                         return 0;
1680                 }
1681
1682                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1683                     adapter->wait_for_reset) {
1684                         rc = init_resources(adapter);
1685                         if (rc)
1686                                 return rc;
1687                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1688                            adapter->req_tx_queues != old_num_tx_queues) {
1689                         adapter->map_id = 1;
1690                         release_rx_pools(adapter);
1691                         release_tx_pools(adapter);
1692                         init_rx_pools(netdev);
1693                         init_tx_pools(netdev);
1694                 } else {
1695                         rc = reset_tx_pools(adapter);
1696                         if (rc)
1697                                 return rc;
1698
1699                         rc = reset_rx_pools(adapter);
1700                         if (rc)
1701                                 return rc;
1702
1703                         if (reset_state == VNIC_CLOSED)
1704                                 return 0;
1705                 }
1706         }
1707
1708         rc = __ibmvnic_open(netdev);
1709         if (rc) {
1710                 if (list_empty(&adapter->rwi_list))
1711                         adapter->state = VNIC_CLOSED;
1712                 else
1713                         adapter->state = reset_state;
1714
1715                 return 0;
1716         }
1717
1718         /* kick napi */
1719         for (i = 0; i < adapter->req_rx_queues; i++)
1720                 napi_schedule(&adapter->napi[i]);
1721
1722         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1723                 netdev_notify_peers(netdev);
1724
1725         netif_carrier_on(netdev);
1726
1727         return 0;
1728 }
1729
1730 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1731 {
1732         struct ibmvnic_rwi *rwi;
1733
1734         mutex_lock(&adapter->rwi_lock);
1735
1736         if (!list_empty(&adapter->rwi_list)) {
1737                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1738                                        list);
1739                 list_del(&rwi->list);
1740         } else {
1741                 rwi = NULL;
1742         }
1743
1744         mutex_unlock(&adapter->rwi_lock);
1745         return rwi;
1746 }
1747
1748 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1749 {
1750         struct ibmvnic_rwi *rwi;
1751
1752         rwi = get_next_rwi(adapter);
1753         while (rwi) {
1754                 kfree(rwi);
1755                 rwi = get_next_rwi(adapter);
1756         }
1757 }
1758
1759 static void __ibmvnic_reset(struct work_struct *work)
1760 {
1761         struct ibmvnic_rwi *rwi;
1762         struct ibmvnic_adapter *adapter;
1763         struct net_device *netdev;
1764         u32 reset_state;
1765         int rc = 0;
1766
1767         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1768         netdev = adapter->netdev;
1769
1770         mutex_lock(&adapter->reset_lock);
1771         adapter->resetting = true;
1772         reset_state = adapter->state;
1773
1774         rwi = get_next_rwi(adapter);
1775         while (rwi) {
1776                 rc = do_reset(adapter, rwi, reset_state);
1777                 kfree(rwi);
1778                 if (rc && rc != IBMVNIC_INIT_FAILED)
1779                         break;
1780
1781                 rwi = get_next_rwi(adapter);
1782         }
1783
1784         if (adapter->wait_for_reset) {
1785                 adapter->wait_for_reset = false;
1786                 adapter->reset_done_rc = rc;
1787                 complete(&adapter->reset_done);
1788         }
1789
1790         if (rc) {
1791                 netdev_dbg(adapter->netdev, "Reset failed\n");
1792                 free_all_rwi(adapter);
1793                 mutex_unlock(&adapter->reset_lock);
1794                 return;
1795         }
1796
1797         adapter->resetting = false;
1798         mutex_unlock(&adapter->reset_lock);
1799 }
1800
1801 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1802                           enum ibmvnic_reset_reason reason)
1803 {
1804         struct ibmvnic_rwi *rwi, *tmp;
1805         struct net_device *netdev = adapter->netdev;
1806         struct list_head *entry;
1807
1808         if (adapter->state == VNIC_REMOVING ||
1809             adapter->state == VNIC_REMOVED) {
1810                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1811                 return;
1812         }
1813
1814         if (adapter->state == VNIC_PROBING) {
1815                 netdev_warn(netdev, "Adapter reset during probe\n");
1816                 adapter->init_done_rc = EAGAIN;
1817                 return;
1818         }
1819
1820         mutex_lock(&adapter->rwi_lock);
1821
1822         list_for_each(entry, &adapter->rwi_list) {
1823                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1824                 if (tmp->reset_reason == reason) {
1825                         netdev_dbg(netdev, "Skipping matching reset\n");
1826                         mutex_unlock(&adapter->rwi_lock);
1827                         return;
1828                 }
1829         }
1830
1831         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1832         if (!rwi) {
1833                 mutex_unlock(&adapter->rwi_lock);
1834                 ibmvnic_close(netdev);
1835                 return;
1836         }
1837
1838         rwi->reset_reason = reason;
1839         list_add_tail(&rwi->list, &adapter->rwi_list);
1840         mutex_unlock(&adapter->rwi_lock);
1841
1842         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1843         schedule_work(&adapter->ibmvnic_reset);
1844 }
1845
1846 static void ibmvnic_tx_timeout(struct net_device *dev)
1847 {
1848         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1849
1850         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1851 }
1852
1853 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1854                                   struct ibmvnic_rx_buff *rx_buff)
1855 {
1856         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1857
1858         rx_buff->skb = NULL;
1859
1860         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1861         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1862
1863         atomic_dec(&pool->available);
1864 }
1865
1866 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1867 {
1868         struct net_device *netdev = napi->dev;
1869         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1870         int scrq_num = (int)(napi - adapter->napi);
1871         int frames_processed = 0;
1872
1873 restart_poll:
1874         while (frames_processed < budget) {
1875                 struct sk_buff *skb;
1876                 struct ibmvnic_rx_buff *rx_buff;
1877                 union sub_crq *next;
1878                 u32 length;
1879                 u16 offset;
1880                 u8 flags = 0;
1881
1882                 if (unlikely(adapter->resetting &&
1883                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1884                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1885                         napi_complete_done(napi, frames_processed);
1886                         return frames_processed;
1887                 }
1888
1889                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1890                         break;
1891                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1892                 rx_buff =
1893                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1894                                                           rx_comp.correlator);
1895                 /* do error checking */
1896                 if (next->rx_comp.rc) {
1897                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1898                                    be16_to_cpu(next->rx_comp.rc));
1899                         /* free the entry */
1900                         next->rx_comp.first = 0;
1901                         dev_kfree_skb_any(rx_buff->skb);
1902                         remove_buff_from_pool(adapter, rx_buff);
1903                         continue;
1904                 } else if (!rx_buff->skb) {
1905                         /* free the entry */
1906                         next->rx_comp.first = 0;
1907                         remove_buff_from_pool(adapter, rx_buff);
1908                         continue;
1909                 }
1910
1911                 length = be32_to_cpu(next->rx_comp.len);
1912                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1913                 flags = next->rx_comp.flags;
1914                 skb = rx_buff->skb;
1915                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1916                                         length);
1917
1918                 /* VLAN Header has been stripped by the system firmware and
1919                  * needs to be inserted by the driver
1920                  */
1921                 if (adapter->rx_vlan_header_insertion &&
1922                     (flags & IBMVNIC_VLAN_STRIPPED))
1923                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1924                                                ntohs(next->rx_comp.vlan_tci));
1925
1926                 /* free the entry */
1927                 next->rx_comp.first = 0;
1928                 remove_buff_from_pool(adapter, rx_buff);
1929
1930                 skb_put(skb, length);
1931                 skb->protocol = eth_type_trans(skb, netdev);
1932                 skb_record_rx_queue(skb, scrq_num);
1933
1934                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1935                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1936                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1937                 }
1938
1939                 length = skb->len;
1940                 napi_gro_receive(napi, skb); /* send it up */
1941                 netdev->stats.rx_packets++;
1942                 netdev->stats.rx_bytes += length;
1943                 adapter->rx_stats_buffers[scrq_num].packets++;
1944                 adapter->rx_stats_buffers[scrq_num].bytes += length;
1945                 frames_processed++;
1946         }
1947
1948         if (adapter->state != VNIC_CLOSING)
1949                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1950
1951         if (frames_processed < budget) {
1952                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1953                 napi_complete_done(napi, frames_processed);
1954                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1955                     napi_reschedule(napi)) {
1956                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1957                         goto restart_poll;
1958                 }
1959         }
1960         return frames_processed;
1961 }
1962
1963 #ifdef CONFIG_NET_POLL_CONTROLLER
1964 static void ibmvnic_netpoll_controller(struct net_device *dev)
1965 {
1966         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1967         int i;
1968
1969         replenish_pools(netdev_priv(dev));
1970         for (i = 0; i < adapter->req_rx_queues; i++)
1971                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1972                                      adapter->rx_scrq[i]);
1973 }
1974 #endif
1975
1976 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1977 {
1978         adapter->fallback.mtu = adapter->req_mtu;
1979         adapter->fallback.rx_queues = adapter->req_rx_queues;
1980         adapter->fallback.tx_queues = adapter->req_tx_queues;
1981         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1982         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1983
1984         init_completion(&adapter->reset_done);
1985         ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1986         adapter->wait_for_reset = true;
1987         wait_for_completion(&adapter->reset_done);
1988
1989         if (adapter->reset_done_rc) {
1990                 adapter->desired.mtu = adapter->fallback.mtu;
1991                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1992                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1993                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1994                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1995
1996                 init_completion(&adapter->reset_done);
1997                 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1998                 wait_for_completion(&adapter->reset_done);
1999         }
2000         adapter->wait_for_reset = false;
2001
2002         return adapter->reset_done_rc;
2003 }
2004
2005 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2006 {
2007         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2008
2009         adapter->desired.mtu = new_mtu + ETH_HLEN;
2010
2011         return wait_for_reset(adapter);
2012 }
2013
2014 static const struct net_device_ops ibmvnic_netdev_ops = {
2015         .ndo_open               = ibmvnic_open,
2016         .ndo_stop               = ibmvnic_close,
2017         .ndo_start_xmit         = ibmvnic_xmit,
2018         .ndo_set_rx_mode        = ibmvnic_set_multi,
2019         .ndo_set_mac_address    = ibmvnic_set_mac,
2020         .ndo_validate_addr      = eth_validate_addr,
2021         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2022 #ifdef CONFIG_NET_POLL_CONTROLLER
2023         .ndo_poll_controller    = ibmvnic_netpoll_controller,
2024 #endif
2025         .ndo_change_mtu         = ibmvnic_change_mtu,
2026 };
2027
2028 /* ethtool functions */
2029
2030 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2031                                       struct ethtool_link_ksettings *cmd)
2032 {
2033         u32 supported, advertising;
2034
2035         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2036                           SUPPORTED_FIBRE);
2037         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2038                             ADVERTISED_FIBRE);
2039         cmd->base.speed = SPEED_1000;
2040         cmd->base.duplex = DUPLEX_FULL;
2041         cmd->base.port = PORT_FIBRE;
2042         cmd->base.phy_address = 0;
2043         cmd->base.autoneg = AUTONEG_ENABLE;
2044
2045         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2046                                                 supported);
2047         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2048                                                 advertising);
2049
2050         return 0;
2051 }
2052
2053 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2054                                 struct ethtool_drvinfo *info)
2055 {
2056         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2057
2058         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2059         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2060         strlcpy(info->fw_version, adapter->fw_version,
2061                 sizeof(info->fw_version));
2062 }
2063
2064 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2065 {
2066         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2067
2068         return adapter->msg_enable;
2069 }
2070
2071 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2072 {
2073         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2074
2075         adapter->msg_enable = data;
2076 }
2077
2078 static u32 ibmvnic_get_link(struct net_device *netdev)
2079 {
2080         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2081
2082         /* Don't need to send a query because we request a logical link up at
2083          * init and then we wait for link state indications
2084          */
2085         return adapter->logical_link_state;
2086 }
2087
2088 static void ibmvnic_get_ringparam(struct net_device *netdev,
2089                                   struct ethtool_ringparam *ring)
2090 {
2091         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2092
2093         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2094         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2095         ring->rx_mini_max_pending = 0;
2096         ring->rx_jumbo_max_pending = 0;
2097         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2098         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2099         ring->rx_mini_pending = 0;
2100         ring->rx_jumbo_pending = 0;
2101 }
2102
2103 static int ibmvnic_set_ringparam(struct net_device *netdev,
2104                                  struct ethtool_ringparam *ring)
2105 {
2106         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2107
2108         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2109             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2110                 netdev_err(netdev, "Invalid request.\n");
2111                 netdev_err(netdev, "Max tx buffers = %llu\n",
2112                            adapter->max_rx_add_entries_per_subcrq);
2113                 netdev_err(netdev, "Max rx buffers = %llu\n",
2114                            adapter->max_tx_entries_per_subcrq);
2115                 return -EINVAL;
2116         }
2117
2118         adapter->desired.rx_entries = ring->rx_pending;
2119         adapter->desired.tx_entries = ring->tx_pending;
2120
2121         return wait_for_reset(adapter);
2122 }
2123
2124 static void ibmvnic_get_channels(struct net_device *netdev,
2125                                  struct ethtool_channels *channels)
2126 {
2127         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2128
2129         channels->max_rx = adapter->max_rx_queues;
2130         channels->max_tx = adapter->max_tx_queues;
2131         channels->max_other = 0;
2132         channels->max_combined = 0;
2133         channels->rx_count = adapter->req_rx_queues;
2134         channels->tx_count = adapter->req_tx_queues;
2135         channels->other_count = 0;
2136         channels->combined_count = 0;
2137 }
2138
2139 static int ibmvnic_set_channels(struct net_device *netdev,
2140                                 struct ethtool_channels *channels)
2141 {
2142         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2143
2144         adapter->desired.rx_queues = channels->rx_count;
2145         adapter->desired.tx_queues = channels->tx_count;
2146
2147         return wait_for_reset(adapter);
2148 }
2149
2150 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2151 {
2152         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2153         int i;
2154
2155         if (stringset != ETH_SS_STATS)
2156                 return;
2157
2158         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2159                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2160
2161         for (i = 0; i < adapter->req_tx_queues; i++) {
2162                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2163                 data += ETH_GSTRING_LEN;
2164
2165                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2166                 data += ETH_GSTRING_LEN;
2167
2168                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2169                 data += ETH_GSTRING_LEN;
2170         }
2171
2172         for (i = 0; i < adapter->req_rx_queues; i++) {
2173                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2174                 data += ETH_GSTRING_LEN;
2175
2176                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2177                 data += ETH_GSTRING_LEN;
2178
2179                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2180                 data += ETH_GSTRING_LEN;
2181         }
2182 }
2183
2184 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2185 {
2186         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2187
2188         switch (sset) {
2189         case ETH_SS_STATS:
2190                 return ARRAY_SIZE(ibmvnic_stats) +
2191                        adapter->req_tx_queues * NUM_TX_STATS +
2192                        adapter->req_rx_queues * NUM_RX_STATS;
2193         default:
2194                 return -EOPNOTSUPP;
2195         }
2196 }
2197
2198 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2199                                       struct ethtool_stats *stats, u64 *data)
2200 {
2201         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2202         union ibmvnic_crq crq;
2203         int i, j;
2204
2205         memset(&crq, 0, sizeof(crq));
2206         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2207         crq.request_statistics.cmd = REQUEST_STATISTICS;
2208         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2209         crq.request_statistics.len =
2210             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2211
2212         /* Wait for data to be written */
2213         init_completion(&adapter->stats_done);
2214         ibmvnic_send_crq(adapter, &crq);
2215         wait_for_completion(&adapter->stats_done);
2216
2217         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2218                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2219                                                 ibmvnic_stats[i].offset));
2220
2221         for (j = 0; j < adapter->req_tx_queues; j++) {
2222                 data[i] = adapter->tx_stats_buffers[j].packets;
2223                 i++;
2224                 data[i] = adapter->tx_stats_buffers[j].bytes;
2225                 i++;
2226                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2227                 i++;
2228         }
2229
2230         for (j = 0; j < adapter->req_rx_queues; j++) {
2231                 data[i] = adapter->rx_stats_buffers[j].packets;
2232                 i++;
2233                 data[i] = adapter->rx_stats_buffers[j].bytes;
2234                 i++;
2235                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2236                 i++;
2237         }
2238 }
2239
2240 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2241         .get_drvinfo            = ibmvnic_get_drvinfo,
2242         .get_msglevel           = ibmvnic_get_msglevel,
2243         .set_msglevel           = ibmvnic_set_msglevel,
2244         .get_link               = ibmvnic_get_link,
2245         .get_ringparam          = ibmvnic_get_ringparam,
2246         .set_ringparam          = ibmvnic_set_ringparam,
2247         .get_channels           = ibmvnic_get_channels,
2248         .set_channels           = ibmvnic_set_channels,
2249         .get_strings            = ibmvnic_get_strings,
2250         .get_sset_count         = ibmvnic_get_sset_count,
2251         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2252         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2253 };
2254
2255 /* Routines for managing CRQs/sCRQs  */
2256
2257 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2258                                    struct ibmvnic_sub_crq_queue *scrq)
2259 {
2260         int rc;
2261
2262         if (scrq->irq) {
2263                 free_irq(scrq->irq, scrq);
2264                 irq_dispose_mapping(scrq->irq);
2265                 scrq->irq = 0;
2266         }
2267
2268         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2269         scrq->cur = 0;
2270
2271         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2272                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2273         return rc;
2274 }
2275
2276 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2277 {
2278         int i, rc;
2279
2280         for (i = 0; i < adapter->req_tx_queues; i++) {
2281                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2282                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2283                 if (rc)
2284                         return rc;
2285         }
2286
2287         for (i = 0; i < adapter->req_rx_queues; i++) {
2288                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2289                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2290                 if (rc)
2291                         return rc;
2292         }
2293
2294         return rc;
2295 }
2296
2297 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2298                                   struct ibmvnic_sub_crq_queue *scrq)
2299 {
2300         struct device *dev = &adapter->vdev->dev;
2301         long rc;
2302
2303         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2304
2305         /* Close the sub-crqs */
2306         do {
2307                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2308                                         adapter->vdev->unit_address,
2309                                         scrq->crq_num);
2310         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2311
2312         if (rc) {
2313                 netdev_err(adapter->netdev,
2314                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
2315                            scrq->crq_num, rc);
2316         }
2317
2318         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2319                          DMA_BIDIRECTIONAL);
2320         free_pages((unsigned long)scrq->msgs, 2);
2321         kfree(scrq);
2322 }
2323
2324 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2325                                                         *adapter)
2326 {
2327         struct device *dev = &adapter->vdev->dev;
2328         struct ibmvnic_sub_crq_queue *scrq;
2329         int rc;
2330
2331         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2332         if (!scrq)
2333                 return NULL;
2334
2335         scrq->msgs =
2336                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2337         if (!scrq->msgs) {
2338                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2339                 goto zero_page_failed;
2340         }
2341
2342         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2343                                          DMA_BIDIRECTIONAL);
2344         if (dma_mapping_error(dev, scrq->msg_token)) {
2345                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2346                 goto map_failed;
2347         }
2348
2349         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2350                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2351
2352         if (rc == H_RESOURCE)
2353                 rc = ibmvnic_reset_crq(adapter);
2354
2355         if (rc == H_CLOSED) {
2356                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2357         } else if (rc) {
2358                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2359                 goto reg_failed;
2360         }
2361
2362         scrq->adapter = adapter;
2363         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2364         spin_lock_init(&scrq->lock);
2365
2366         netdev_dbg(adapter->netdev,
2367                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2368                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2369
2370         return scrq;
2371
2372 reg_failed:
2373         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2374                          DMA_BIDIRECTIONAL);
2375 map_failed:
2376         free_pages((unsigned long)scrq->msgs, 2);
2377 zero_page_failed:
2378         kfree(scrq);
2379
2380         return NULL;
2381 }
2382
2383 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2384 {
2385         int i;
2386
2387         if (adapter->tx_scrq) {
2388                 for (i = 0; i < adapter->req_tx_queues; i++) {
2389                         if (!adapter->tx_scrq[i])
2390                                 continue;
2391
2392                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2393                                    i);
2394                         if (adapter->tx_scrq[i]->irq) {
2395                                 free_irq(adapter->tx_scrq[i]->irq,
2396                                          adapter->tx_scrq[i]);
2397                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2398                                 adapter->tx_scrq[i]->irq = 0;
2399                         }
2400
2401                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2402                 }
2403
2404                 kfree(adapter->tx_scrq);
2405                 adapter->tx_scrq = NULL;
2406         }
2407
2408         if (adapter->rx_scrq) {
2409                 for (i = 0; i < adapter->req_rx_queues; i++) {
2410                         if (!adapter->rx_scrq[i])
2411                                 continue;
2412
2413                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2414                                    i);
2415                         if (adapter->rx_scrq[i]->irq) {
2416                                 free_irq(adapter->rx_scrq[i]->irq,
2417                                          adapter->rx_scrq[i]);
2418                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2419                                 adapter->rx_scrq[i]->irq = 0;
2420                         }
2421
2422                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2423                 }
2424
2425                 kfree(adapter->rx_scrq);
2426                 adapter->rx_scrq = NULL;
2427         }
2428 }
2429
2430 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2431                             struct ibmvnic_sub_crq_queue *scrq)
2432 {
2433         struct device *dev = &adapter->vdev->dev;
2434         unsigned long rc;
2435
2436         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2437                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2438         if (rc)
2439                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2440                         scrq->hw_irq, rc);
2441         return rc;
2442 }
2443
2444 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2445                            struct ibmvnic_sub_crq_queue *scrq)
2446 {
2447         struct device *dev = &adapter->vdev->dev;
2448         unsigned long rc;
2449
2450         if (scrq->hw_irq > 0x100000000ULL) {
2451                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2452                 return 1;
2453         }
2454
2455         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2456                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2457         if (rc)
2458                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2459                         scrq->hw_irq, rc);
2460         return rc;
2461 }
2462
2463 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2464                                struct ibmvnic_sub_crq_queue *scrq)
2465 {
2466         struct device *dev = &adapter->vdev->dev;
2467         struct ibmvnic_tx_buff *txbuff;
2468         union sub_crq *next;
2469         int index;
2470         int i, j;
2471         u8 first;
2472
2473 restart_loop:
2474         while (pending_scrq(adapter, scrq)) {
2475                 unsigned int pool = scrq->pool_index;
2476
2477                 next = ibmvnic_next_scrq(adapter, scrq);
2478                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2479                         if (next->tx_comp.rcs[i]) {
2480                                 dev_err(dev, "tx error %x\n",
2481                                         next->tx_comp.rcs[i]);
2482                                 continue;
2483                         }
2484                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2485                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2486
2487                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2488                                 if (!txbuff->data_dma[j])
2489                                         continue;
2490
2491                                 txbuff->data_dma[j] = 0;
2492                         }
2493                         /* if sub_crq was sent indirectly */
2494                         first = txbuff->indir_arr[0].generic.first;
2495                         if (first == IBMVNIC_CRQ_CMD) {
2496                                 dma_unmap_single(dev, txbuff->indir_dma,
2497                                                  sizeof(txbuff->indir_arr),
2498                                                  DMA_TO_DEVICE);
2499                         }
2500
2501                         if (txbuff->last_frag) {
2502                                 dev_kfree_skb_any(txbuff->skb);
2503                                 txbuff->skb = NULL;
2504                         }
2505
2506                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2507                                                      producer_index] = index;
2508                         adapter->tx_pool[pool].producer_index =
2509                             (adapter->tx_pool[pool].producer_index + 1) %
2510                             adapter->req_tx_entries_per_subcrq;
2511                 }
2512                 /* remove tx_comp scrq*/
2513                 next->tx_comp.first = 0;
2514
2515                 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2516                     (adapter->req_tx_entries_per_subcrq / 2) &&
2517                     __netif_subqueue_stopped(adapter->netdev,
2518                                              scrq->pool_index)) {
2519                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2520                         netdev_info(adapter->netdev, "Started queue %d\n",
2521                                     scrq->pool_index);
2522                 }
2523         }
2524
2525         enable_scrq_irq(adapter, scrq);
2526
2527         if (pending_scrq(adapter, scrq)) {
2528                 disable_scrq_irq(adapter, scrq);
2529                 goto restart_loop;
2530         }
2531
2532         return 0;
2533 }
2534
2535 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2536 {
2537         struct ibmvnic_sub_crq_queue *scrq = instance;
2538         struct ibmvnic_adapter *adapter = scrq->adapter;
2539
2540         disable_scrq_irq(adapter, scrq);
2541         ibmvnic_complete_tx(adapter, scrq);
2542
2543         return IRQ_HANDLED;
2544 }
2545
2546 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2547 {
2548         struct ibmvnic_sub_crq_queue *scrq = instance;
2549         struct ibmvnic_adapter *adapter = scrq->adapter;
2550
2551         /* When booting a kdump kernel we can hit pending interrupts
2552          * prior to completing driver initialization.
2553          */
2554         if (unlikely(adapter->state != VNIC_OPEN))
2555                 return IRQ_NONE;
2556
2557         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2558
2559         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2560                 disable_scrq_irq(adapter, scrq);
2561                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2562         }
2563
2564         return IRQ_HANDLED;
2565 }
2566
2567 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2568 {
2569         struct device *dev = &adapter->vdev->dev;
2570         struct ibmvnic_sub_crq_queue *scrq;
2571         int i = 0, j = 0;
2572         int rc = 0;
2573
2574         for (i = 0; i < adapter->req_tx_queues; i++) {
2575                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2576                            i);
2577                 scrq = adapter->tx_scrq[i];
2578                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2579
2580                 if (!scrq->irq) {
2581                         rc = -EINVAL;
2582                         dev_err(dev, "Error mapping irq\n");
2583                         goto req_tx_irq_failed;
2584                 }
2585
2586                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2587                                  0, "ibmvnic_tx", scrq);
2588
2589                 if (rc) {
2590                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2591                                 scrq->irq, rc);
2592                         irq_dispose_mapping(scrq->irq);
2593                         goto req_rx_irq_failed;
2594                 }
2595         }
2596
2597         for (i = 0; i < adapter->req_rx_queues; i++) {
2598                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2599                            i);
2600                 scrq = adapter->rx_scrq[i];
2601                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2602                 if (!scrq->irq) {
2603                         rc = -EINVAL;
2604                         dev_err(dev, "Error mapping irq\n");
2605                         goto req_rx_irq_failed;
2606                 }
2607                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2608                                  0, "ibmvnic_rx", scrq);
2609                 if (rc) {
2610                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2611                                 scrq->irq, rc);
2612                         irq_dispose_mapping(scrq->irq);
2613                         goto req_rx_irq_failed;
2614                 }
2615         }
2616         return rc;
2617
2618 req_rx_irq_failed:
2619         for (j = 0; j < i; j++) {
2620                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2621                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2622         }
2623         i = adapter->req_tx_queues;
2624 req_tx_irq_failed:
2625         for (j = 0; j < i; j++) {
2626                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2627                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2628         }
2629         release_sub_crqs(adapter);
2630         return rc;
2631 }
2632
2633 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2634 {
2635         struct device *dev = &adapter->vdev->dev;
2636         struct ibmvnic_sub_crq_queue **allqueues;
2637         int registered_queues = 0;
2638         int total_queues;
2639         int more = 0;
2640         int i;
2641
2642         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2643
2644         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2645         if (!allqueues)
2646                 return -1;
2647
2648         for (i = 0; i < total_queues; i++) {
2649                 allqueues[i] = init_sub_crq_queue(adapter);
2650                 if (!allqueues[i]) {
2651                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2652                         break;
2653                 }
2654                 registered_queues++;
2655         }
2656
2657         /* Make sure we were able to register the minimum number of queues */
2658         if (registered_queues <
2659             adapter->min_tx_queues + adapter->min_rx_queues) {
2660                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2661                 goto tx_failed;
2662         }
2663
2664         /* Distribute the failed allocated queues*/
2665         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2666                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2667                 switch (i % 3) {
2668                 case 0:
2669                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2670                                 adapter->req_rx_queues--;
2671                         else
2672                                 more++;
2673                         break;
2674                 case 1:
2675                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2676                                 adapter->req_tx_queues--;
2677                         else
2678                                 more++;
2679                         break;
2680                 }
2681         }
2682
2683         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2684                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2685         if (!adapter->tx_scrq)
2686                 goto tx_failed;
2687
2688         for (i = 0; i < adapter->req_tx_queues; i++) {
2689                 adapter->tx_scrq[i] = allqueues[i];
2690                 adapter->tx_scrq[i]->pool_index = i;
2691         }
2692
2693         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2694                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2695         if (!adapter->rx_scrq)
2696                 goto rx_failed;
2697
2698         for (i = 0; i < adapter->req_rx_queues; i++) {
2699                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2700                 adapter->rx_scrq[i]->scrq_num = i;
2701         }
2702
2703         kfree(allqueues);
2704         return 0;
2705
2706 rx_failed:
2707         kfree(adapter->tx_scrq);
2708         adapter->tx_scrq = NULL;
2709 tx_failed:
2710         for (i = 0; i < registered_queues; i++)
2711                 release_sub_crq_queue(adapter, allqueues[i]);
2712         kfree(allqueues);
2713         return -1;
2714 }
2715
2716 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2717 {
2718         struct device *dev = &adapter->vdev->dev;
2719         union ibmvnic_crq crq;
2720         int max_entries;
2721
2722         if (!retry) {
2723                 /* Sub-CRQ entries are 32 byte long */
2724                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2725
2726                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2727                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2728                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2729                         return;
2730                 }
2731
2732                 if (adapter->desired.mtu)
2733                         adapter->req_mtu = adapter->desired.mtu;
2734                 else
2735                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2736
2737                 if (!adapter->desired.tx_entries)
2738                         adapter->desired.tx_entries =
2739                                         adapter->max_tx_entries_per_subcrq;
2740                 if (!adapter->desired.rx_entries)
2741                         adapter->desired.rx_entries =
2742                                         adapter->max_rx_add_entries_per_subcrq;
2743
2744                 max_entries = IBMVNIC_MAX_LTB_SIZE /
2745                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2746
2747                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2748                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2749                         adapter->desired.tx_entries = max_entries;
2750                 }
2751
2752                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2753                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2754                         adapter->desired.rx_entries = max_entries;
2755                 }
2756
2757                 if (adapter->desired.tx_entries)
2758                         adapter->req_tx_entries_per_subcrq =
2759                                         adapter->desired.tx_entries;
2760                 else
2761                         adapter->req_tx_entries_per_subcrq =
2762                                         adapter->max_tx_entries_per_subcrq;
2763
2764                 if (adapter->desired.rx_entries)
2765                         adapter->req_rx_add_entries_per_subcrq =
2766                                         adapter->desired.rx_entries;
2767                 else
2768                         adapter->req_rx_add_entries_per_subcrq =
2769                                         adapter->max_rx_add_entries_per_subcrq;
2770
2771                 if (adapter->desired.tx_queues)
2772                         adapter->req_tx_queues =
2773                                         adapter->desired.tx_queues;
2774                 else
2775                         adapter->req_tx_queues =
2776                                         adapter->opt_tx_comp_sub_queues;
2777
2778                 if (adapter->desired.rx_queues)
2779                         adapter->req_rx_queues =
2780                                         adapter->desired.rx_queues;
2781                 else
2782                         adapter->req_rx_queues =
2783                                         adapter->opt_rx_comp_queues;
2784
2785                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2786         }
2787
2788         memset(&crq, 0, sizeof(crq));
2789         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2790         crq.request_capability.cmd = REQUEST_CAPABILITY;
2791
2792         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2793         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2794         atomic_inc(&adapter->running_cap_crqs);
2795         ibmvnic_send_crq(adapter, &crq);
2796
2797         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2798         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2799         atomic_inc(&adapter->running_cap_crqs);
2800         ibmvnic_send_crq(adapter, &crq);
2801
2802         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2803         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2804         atomic_inc(&adapter->running_cap_crqs);
2805         ibmvnic_send_crq(adapter, &crq);
2806
2807         crq.request_capability.capability =
2808             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2809         crq.request_capability.number =
2810             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2811         atomic_inc(&adapter->running_cap_crqs);
2812         ibmvnic_send_crq(adapter, &crq);
2813
2814         crq.request_capability.capability =
2815             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2816         crq.request_capability.number =
2817             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2818         atomic_inc(&adapter->running_cap_crqs);
2819         ibmvnic_send_crq(adapter, &crq);
2820
2821         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2822         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2823         atomic_inc(&adapter->running_cap_crqs);
2824         ibmvnic_send_crq(adapter, &crq);
2825
2826         if (adapter->netdev->flags & IFF_PROMISC) {
2827                 if (adapter->promisc_supported) {
2828                         crq.request_capability.capability =
2829                             cpu_to_be16(PROMISC_REQUESTED);
2830                         crq.request_capability.number = cpu_to_be64(1);
2831                         atomic_inc(&adapter->running_cap_crqs);
2832                         ibmvnic_send_crq(adapter, &crq);
2833                 }
2834         } else {
2835                 crq.request_capability.capability =
2836                     cpu_to_be16(PROMISC_REQUESTED);
2837                 crq.request_capability.number = cpu_to_be64(0);
2838                 atomic_inc(&adapter->running_cap_crqs);
2839                 ibmvnic_send_crq(adapter, &crq);
2840         }
2841 }
2842
2843 static int pending_scrq(struct ibmvnic_adapter *adapter,
2844                         struct ibmvnic_sub_crq_queue *scrq)
2845 {
2846         union sub_crq *entry = &scrq->msgs[scrq->cur];
2847
2848         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2849                 return 1;
2850         else
2851                 return 0;
2852 }
2853
2854 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2855                                         struct ibmvnic_sub_crq_queue *scrq)
2856 {
2857         union sub_crq *entry;
2858         unsigned long flags;
2859
2860         spin_lock_irqsave(&scrq->lock, flags);
2861         entry = &scrq->msgs[scrq->cur];
2862         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2863                 if (++scrq->cur == scrq->size)
2864                         scrq->cur = 0;
2865         } else {
2866                 entry = NULL;
2867         }
2868         spin_unlock_irqrestore(&scrq->lock, flags);
2869
2870         return entry;
2871 }
2872
2873 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2874 {
2875         struct ibmvnic_crq_queue *queue = &adapter->crq;
2876         union ibmvnic_crq *crq;
2877
2878         crq = &queue->msgs[queue->cur];
2879         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2880                 if (++queue->cur == queue->size)
2881                         queue->cur = 0;
2882         } else {
2883                 crq = NULL;
2884         }
2885
2886         return crq;
2887 }
2888
2889 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2890                        union sub_crq *sub_crq)
2891 {
2892         unsigned int ua = adapter->vdev->unit_address;
2893         struct device *dev = &adapter->vdev->dev;
2894         u64 *u64_crq = (u64 *)sub_crq;
2895         int rc;
2896
2897         netdev_dbg(adapter->netdev,
2898                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2899                    (unsigned long int)cpu_to_be64(remote_handle),
2900                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2901                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2902                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2903                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2904
2905         /* Make sure the hypervisor sees the complete request */
2906         mb();
2907
2908         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2909                                 cpu_to_be64(remote_handle),
2910                                 cpu_to_be64(u64_crq[0]),
2911                                 cpu_to_be64(u64_crq[1]),
2912                                 cpu_to_be64(u64_crq[2]),
2913                                 cpu_to_be64(u64_crq[3]));
2914
2915         if (rc) {
2916                 if (rc == H_CLOSED)
2917                         dev_warn(dev, "CRQ Queue closed\n");
2918                 dev_err(dev, "Send error (rc=%d)\n", rc);
2919         }
2920
2921         return rc;
2922 }
2923
2924 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2925                                 u64 remote_handle, u64 ioba, u64 num_entries)
2926 {
2927         unsigned int ua = adapter->vdev->unit_address;
2928         struct device *dev = &adapter->vdev->dev;
2929         int rc;
2930
2931         /* Make sure the hypervisor sees the complete request */
2932         mb();
2933         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2934                                 cpu_to_be64(remote_handle),
2935                                 ioba, num_entries);
2936
2937         if (rc) {
2938                 if (rc == H_CLOSED)
2939                         dev_warn(dev, "CRQ Queue closed\n");
2940                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2941         }
2942
2943         return rc;
2944 }
2945
2946 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2947                             union ibmvnic_crq *crq)
2948 {
2949         unsigned int ua = adapter->vdev->unit_address;
2950         struct device *dev = &adapter->vdev->dev;
2951         u64 *u64_crq = (u64 *)crq;
2952         int rc;
2953
2954         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2955                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2956                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2957
2958         /* Make sure the hypervisor sees the complete request */
2959         mb();
2960
2961         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2962                                 cpu_to_be64(u64_crq[0]),
2963                                 cpu_to_be64(u64_crq[1]));
2964
2965         if (rc) {
2966                 if (rc == H_CLOSED) {
2967                         dev_warn(dev, "CRQ Queue closed\n");
2968                         if (adapter->resetting)
2969                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2970                 }
2971
2972                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2973         }
2974
2975         return rc;
2976 }
2977
2978 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2979 {
2980         union ibmvnic_crq crq;
2981
2982         memset(&crq, 0, sizeof(crq));
2983         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2984         crq.generic.cmd = IBMVNIC_CRQ_INIT;
2985         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2986
2987         return ibmvnic_send_crq(adapter, &crq);
2988 }
2989
2990 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2991 {
2992         union ibmvnic_crq crq;
2993
2994         memset(&crq, 0, sizeof(crq));
2995         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2996         crq.version_exchange.cmd = VERSION_EXCHANGE;
2997         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2998
2999         return ibmvnic_send_crq(adapter, &crq);
3000 }
3001
3002 struct vnic_login_client_data {
3003         u8      type;
3004         __be16  len;
3005         char    name;
3006 } __packed;
3007
3008 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3009 {
3010         int len;
3011
3012         /* Calculate the amount of buffer space needed for the
3013          * vnic client data in the login buffer. There are four entries,
3014          * OS name, LPAR name, device name, and a null last entry.
3015          */
3016         len = 4 * sizeof(struct vnic_login_client_data);
3017         len += 6; /* "Linux" plus NULL */
3018         len += strlen(utsname()->nodename) + 1;
3019         len += strlen(adapter->netdev->name) + 1;
3020
3021         return len;
3022 }
3023
3024 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3025                                  struct vnic_login_client_data *vlcd)
3026 {
3027         const char *os_name = "Linux";
3028         int len;
3029
3030         /* Type 1 - LPAR OS */
3031         vlcd->type = 1;
3032         len = strlen(os_name) + 1;
3033         vlcd->len = cpu_to_be16(len);
3034         strncpy(&vlcd->name, os_name, len);
3035         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3036
3037         /* Type 2 - LPAR name */
3038         vlcd->type = 2;
3039         len = strlen(utsname()->nodename) + 1;
3040         vlcd->len = cpu_to_be16(len);
3041         strncpy(&vlcd->name, utsname()->nodename, len);
3042         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3043
3044         /* Type 3 - device name */
3045         vlcd->type = 3;
3046         len = strlen(adapter->netdev->name) + 1;
3047         vlcd->len = cpu_to_be16(len);
3048         strncpy(&vlcd->name, adapter->netdev->name, len);
3049 }
3050
3051 static void send_login(struct ibmvnic_adapter *adapter)
3052 {
3053         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3054         struct ibmvnic_login_buffer *login_buffer;
3055         struct device *dev = &adapter->vdev->dev;
3056         dma_addr_t rsp_buffer_token;
3057         dma_addr_t buffer_token;
3058         size_t rsp_buffer_size;
3059         union ibmvnic_crq crq;
3060         size_t buffer_size;
3061         __be64 *tx_list_p;
3062         __be64 *rx_list_p;
3063         int client_data_len;
3064         struct vnic_login_client_data *vlcd;
3065         int i;
3066
3067         release_login_rsp_buffer(adapter);
3068         client_data_len = vnic_client_data_len(adapter);
3069
3070         buffer_size =
3071             sizeof(struct ibmvnic_login_buffer) +
3072             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3073             client_data_len;
3074
3075         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3076         if (!login_buffer)
3077                 goto buf_alloc_failed;
3078
3079         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3080                                       DMA_TO_DEVICE);
3081         if (dma_mapping_error(dev, buffer_token)) {
3082                 dev_err(dev, "Couldn't map login buffer\n");
3083                 goto buf_map_failed;
3084         }
3085
3086         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3087                           sizeof(u64) * adapter->req_tx_queues +
3088                           sizeof(u64) * adapter->req_rx_queues +
3089                           sizeof(u64) * adapter->req_rx_queues +
3090                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3091
3092         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3093         if (!login_rsp_buffer)
3094                 goto buf_rsp_alloc_failed;
3095
3096         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3097                                           rsp_buffer_size, DMA_FROM_DEVICE);
3098         if (dma_mapping_error(dev, rsp_buffer_token)) {
3099                 dev_err(dev, "Couldn't map login rsp buffer\n");
3100                 goto buf_rsp_map_failed;
3101         }
3102
3103         adapter->login_buf = login_buffer;
3104         adapter->login_buf_token = buffer_token;
3105         adapter->login_buf_sz = buffer_size;
3106         adapter->login_rsp_buf = login_rsp_buffer;
3107         adapter->login_rsp_buf_token = rsp_buffer_token;
3108         adapter->login_rsp_buf_sz = rsp_buffer_size;
3109
3110         login_buffer->len = cpu_to_be32(buffer_size);
3111         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3112         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3113         login_buffer->off_txcomp_subcrqs =
3114             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3115         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3116         login_buffer->off_rxcomp_subcrqs =
3117             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3118                         sizeof(u64) * adapter->req_tx_queues);
3119         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3120         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3121
3122         tx_list_p = (__be64 *)((char *)login_buffer +
3123                                       sizeof(struct ibmvnic_login_buffer));
3124         rx_list_p = (__be64 *)((char *)login_buffer +
3125                                       sizeof(struct ibmvnic_login_buffer) +
3126                                       sizeof(u64) * adapter->req_tx_queues);
3127
3128         for (i = 0; i < adapter->req_tx_queues; i++) {
3129                 if (adapter->tx_scrq[i]) {
3130                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3131                                                    crq_num);
3132                 }
3133         }
3134
3135         for (i = 0; i < adapter->req_rx_queues; i++) {
3136                 if (adapter->rx_scrq[i]) {
3137                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3138                                                    crq_num);
3139                 }
3140         }
3141
3142         /* Insert vNIC login client data */
3143         vlcd = (struct vnic_login_client_data *)
3144                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3145         login_buffer->client_data_offset =
3146                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3147         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3148
3149         vnic_add_client_data(adapter, vlcd);
3150
3151         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3152         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3153                 netdev_dbg(adapter->netdev, "%016lx\n",
3154                            ((unsigned long int *)(adapter->login_buf))[i]);
3155         }
3156
3157         memset(&crq, 0, sizeof(crq));
3158         crq.login.first = IBMVNIC_CRQ_CMD;
3159         crq.login.cmd = LOGIN;
3160         crq.login.ioba = cpu_to_be32(buffer_token);
3161         crq.login.len = cpu_to_be32(buffer_size);
3162         ibmvnic_send_crq(adapter, &crq);
3163
3164         return;
3165
3166 buf_rsp_map_failed:
3167         kfree(login_rsp_buffer);
3168 buf_rsp_alloc_failed:
3169         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3170 buf_map_failed:
3171         kfree(login_buffer);
3172 buf_alloc_failed:
3173         return;
3174 }
3175
3176 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3177                              u32 len, u8 map_id)
3178 {
3179         union ibmvnic_crq crq;
3180
3181         memset(&crq, 0, sizeof(crq));
3182         crq.request_map.first = IBMVNIC_CRQ_CMD;
3183         crq.request_map.cmd = REQUEST_MAP;
3184         crq.request_map.map_id = map_id;
3185         crq.request_map.ioba = cpu_to_be32(addr);
3186         crq.request_map.len = cpu_to_be32(len);
3187         ibmvnic_send_crq(adapter, &crq);
3188 }
3189
3190 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3191 {
3192         union ibmvnic_crq crq;
3193
3194         memset(&crq, 0, sizeof(crq));
3195         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3196         crq.request_unmap.cmd = REQUEST_UNMAP;
3197         crq.request_unmap.map_id = map_id;
3198         ibmvnic_send_crq(adapter, &crq);
3199 }
3200
3201 static void send_map_query(struct ibmvnic_adapter *adapter)
3202 {
3203         union ibmvnic_crq crq;
3204
3205         memset(&crq, 0, sizeof(crq));
3206         crq.query_map.first = IBMVNIC_CRQ_CMD;
3207         crq.query_map.cmd = QUERY_MAP;
3208         ibmvnic_send_crq(adapter, &crq);
3209 }
3210
3211 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3212 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3213 {
3214         union ibmvnic_crq crq;
3215
3216         atomic_set(&adapter->running_cap_crqs, 0);
3217         memset(&crq, 0, sizeof(crq));
3218         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3219         crq.query_capability.cmd = QUERY_CAPABILITY;
3220
3221         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3222         atomic_inc(&adapter->running_cap_crqs);
3223         ibmvnic_send_crq(adapter, &crq);
3224
3225         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3226         atomic_inc(&adapter->running_cap_crqs);
3227         ibmvnic_send_crq(adapter, &crq);
3228
3229         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3230         atomic_inc(&adapter->running_cap_crqs);
3231         ibmvnic_send_crq(adapter, &crq);
3232
3233         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3234         atomic_inc(&adapter->running_cap_crqs);
3235         ibmvnic_send_crq(adapter, &crq);
3236
3237         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3238         atomic_inc(&adapter->running_cap_crqs);
3239         ibmvnic_send_crq(adapter, &crq);
3240
3241         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3242         atomic_inc(&adapter->running_cap_crqs);
3243         ibmvnic_send_crq(adapter, &crq);
3244
3245         crq.query_capability.capability =
3246             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3247         atomic_inc(&adapter->running_cap_crqs);
3248         ibmvnic_send_crq(adapter, &crq);
3249
3250         crq.query_capability.capability =
3251             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3252         atomic_inc(&adapter->running_cap_crqs);
3253         ibmvnic_send_crq(adapter, &crq);
3254
3255         crq.query_capability.capability =
3256             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3257         atomic_inc(&adapter->running_cap_crqs);
3258         ibmvnic_send_crq(adapter, &crq);
3259
3260         crq.query_capability.capability =
3261             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3262         atomic_inc(&adapter->running_cap_crqs);
3263         ibmvnic_send_crq(adapter, &crq);
3264
3265         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3266         atomic_inc(&adapter->running_cap_crqs);
3267         ibmvnic_send_crq(adapter, &crq);
3268
3269         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3270         atomic_inc(&adapter->running_cap_crqs);
3271         ibmvnic_send_crq(adapter, &crq);
3272
3273         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3274         atomic_inc(&adapter->running_cap_crqs);
3275         ibmvnic_send_crq(adapter, &crq);
3276
3277         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3278         atomic_inc(&adapter->running_cap_crqs);
3279         ibmvnic_send_crq(adapter, &crq);
3280
3281         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3282         atomic_inc(&adapter->running_cap_crqs);
3283         ibmvnic_send_crq(adapter, &crq);
3284
3285         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3286         atomic_inc(&adapter->running_cap_crqs);
3287         ibmvnic_send_crq(adapter, &crq);
3288
3289         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3290         atomic_inc(&adapter->running_cap_crqs);
3291         ibmvnic_send_crq(adapter, &crq);
3292
3293         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3294         atomic_inc(&adapter->running_cap_crqs);
3295         ibmvnic_send_crq(adapter, &crq);
3296
3297         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3298         atomic_inc(&adapter->running_cap_crqs);
3299         ibmvnic_send_crq(adapter, &crq);
3300
3301         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3302         atomic_inc(&adapter->running_cap_crqs);
3303         ibmvnic_send_crq(adapter, &crq);
3304
3305         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3306         atomic_inc(&adapter->running_cap_crqs);
3307         ibmvnic_send_crq(adapter, &crq);
3308
3309         crq.query_capability.capability =
3310                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3311         atomic_inc(&adapter->running_cap_crqs);
3312         ibmvnic_send_crq(adapter, &crq);
3313
3314         crq.query_capability.capability =
3315                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3316         atomic_inc(&adapter->running_cap_crqs);
3317         ibmvnic_send_crq(adapter, &crq);
3318
3319         crq.query_capability.capability =
3320                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3321         atomic_inc(&adapter->running_cap_crqs);
3322         ibmvnic_send_crq(adapter, &crq);
3323
3324         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3325         atomic_inc(&adapter->running_cap_crqs);
3326         ibmvnic_send_crq(adapter, &crq);
3327 }
3328
3329 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3330                                 struct ibmvnic_adapter *adapter)
3331 {
3332         struct device *dev = &adapter->vdev->dev;
3333
3334         if (crq->get_vpd_size_rsp.rc.code) {
3335                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3336                         crq->get_vpd_size_rsp.rc.code);
3337                 complete(&adapter->fw_done);
3338                 return;
3339         }
3340
3341         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3342         complete(&adapter->fw_done);
3343 }
3344
3345 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3346                            struct ibmvnic_adapter *adapter)
3347 {
3348         struct device *dev = &adapter->vdev->dev;
3349         unsigned char *substr = NULL;
3350         u8 fw_level_len = 0;
3351
3352         memset(adapter->fw_version, 0, 32);
3353
3354         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3355                          DMA_FROM_DEVICE);
3356
3357         if (crq->get_vpd_rsp.rc.code) {
3358                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3359                         crq->get_vpd_rsp.rc.code);
3360                 goto complete;
3361         }
3362
3363         /* get the position of the firmware version info
3364          * located after the ASCII 'RM' substring in the buffer
3365          */
3366         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3367         if (!substr) {
3368                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3369                 goto complete;
3370         }
3371
3372         /* get length of firmware level ASCII substring */
3373         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3374                 fw_level_len = *(substr + 2);
3375         } else {
3376                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3377                 goto complete;
3378         }
3379
3380         /* copy firmware version string from vpd into adapter */
3381         if ((substr + 3 + fw_level_len) <
3382             (adapter->vpd->buff + adapter->vpd->len)) {
3383                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3384         } else {
3385                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3386         }
3387
3388 complete:
3389         if (adapter->fw_version[0] == '\0')
3390                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3391         complete(&adapter->fw_done);
3392 }
3393
3394 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3395 {
3396         struct device *dev = &adapter->vdev->dev;
3397         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3398         union ibmvnic_crq crq;
3399         int i;
3400
3401         dma_unmap_single(dev, adapter->ip_offload_tok,
3402                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3403
3404         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3405         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3406                 netdev_dbg(adapter->netdev, "%016lx\n",
3407                            ((unsigned long int *)(buf))[i]);
3408
3409         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3410         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3411         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3412                    buf->tcp_ipv4_chksum);
3413         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3414                    buf->tcp_ipv6_chksum);
3415         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3416                    buf->udp_ipv4_chksum);
3417         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3418                    buf->udp_ipv6_chksum);
3419         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3420                    buf->large_tx_ipv4);
3421         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3422                    buf->large_tx_ipv6);
3423         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3424                    buf->large_rx_ipv4);
3425         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3426                    buf->large_rx_ipv6);
3427         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3428                    buf->max_ipv4_header_size);
3429         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3430                    buf->max_ipv6_header_size);
3431         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3432                    buf->max_tcp_header_size);
3433         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3434                    buf->max_udp_header_size);
3435         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3436                    buf->max_large_tx_size);
3437         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3438                    buf->max_large_rx_size);
3439         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3440                    buf->ipv6_extension_header);
3441         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3442                    buf->tcp_pseudosum_req);
3443         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3444                    buf->num_ipv6_ext_headers);
3445         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3446                    buf->off_ipv6_ext_headers);
3447
3448         adapter->ip_offload_ctrl_tok =
3449             dma_map_single(dev, &adapter->ip_offload_ctrl,
3450                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3451
3452         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3453                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3454                 return;
3455         }
3456
3457         adapter->ip_offload_ctrl.len =
3458             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3459         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3460         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3461         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3462         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3463         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3464         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3465         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3466         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3467         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3468
3469         /* large_rx disabled for now, additional features needed */
3470         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3471         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3472
3473         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3474
3475         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3476                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3477
3478         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3479                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3480
3481         if ((adapter->netdev->features &
3482             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3483                 adapter->netdev->features |= NETIF_F_RXCSUM;
3484
3485         if (buf->large_tx_ipv4)
3486                 adapter->netdev->features |= NETIF_F_TSO;
3487         if (buf->large_tx_ipv6)
3488                 adapter->netdev->features |= NETIF_F_TSO6;
3489
3490         adapter->netdev->hw_features |= adapter->netdev->features;
3491
3492         memset(&crq, 0, sizeof(crq));
3493         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3494         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3495         crq.control_ip_offload.len =
3496             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3497         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3498         ibmvnic_send_crq(adapter, &crq);
3499 }
3500
3501 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3502                                   struct ibmvnic_adapter *adapter)
3503 {
3504         struct device *dev = &adapter->vdev->dev;
3505         struct ibmvnic_error_buff *error_buff, *tmp;
3506         unsigned long flags;
3507         bool found = false;
3508         int i;
3509
3510         if (!crq->request_error_rsp.rc.code) {
3511                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3512                          crq->request_error_rsp.rc.code);
3513                 return;
3514         }
3515
3516         spin_lock_irqsave(&adapter->error_list_lock, flags);
3517         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3518                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3519                         found = true;
3520                         list_del(&error_buff->list);
3521                         break;
3522                 }
3523         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3524
3525         if (!found) {
3526                 dev_err(dev, "Couldn't find error id %x\n",
3527                         be32_to_cpu(crq->request_error_rsp.error_id));
3528                 return;
3529         }
3530
3531         dev_err(dev, "Detailed info for error id %x:",
3532                 be32_to_cpu(crq->request_error_rsp.error_id));
3533
3534         for (i = 0; i < error_buff->len; i++) {
3535                 pr_cont("%02x", (int)error_buff->buff[i]);
3536                 if (i % 8 == 7)
3537                         pr_cont(" ");
3538         }
3539         pr_cont("\n");
3540
3541         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3542                          DMA_FROM_DEVICE);
3543         kfree(error_buff->buff);
3544         kfree(error_buff);
3545 }
3546
3547 static void request_error_information(struct ibmvnic_adapter *adapter,
3548                                       union ibmvnic_crq *err_crq)
3549 {
3550         struct device *dev = &adapter->vdev->dev;
3551         struct net_device *netdev = adapter->netdev;
3552         struct ibmvnic_error_buff *error_buff;
3553         unsigned long timeout = msecs_to_jiffies(30000);
3554         union ibmvnic_crq crq;
3555         unsigned long flags;
3556         int rc, detail_len;
3557
3558         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3559         if (!error_buff)
3560                 return;
3561
3562         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3563         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3564         if (!error_buff->buff) {
3565                 kfree(error_buff);
3566                 return;
3567         }
3568
3569         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3570                                          DMA_FROM_DEVICE);
3571         if (dma_mapping_error(dev, error_buff->dma)) {
3572                 netdev_err(netdev, "Couldn't map error buffer\n");
3573                 kfree(error_buff->buff);
3574                 kfree(error_buff);
3575                 return;
3576         }
3577
3578         error_buff->len = detail_len;
3579         error_buff->error_id = err_crq->error_indication.error_id;
3580
3581         spin_lock_irqsave(&adapter->error_list_lock, flags);
3582         list_add_tail(&error_buff->list, &adapter->errors);
3583         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3584
3585         memset(&crq, 0, sizeof(crq));
3586         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3587         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3588         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3589         crq.request_error_info.len = cpu_to_be32(detail_len);
3590         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3591
3592         rc = ibmvnic_send_crq(adapter, &crq);
3593         if (rc) {
3594                 netdev_err(netdev, "failed to request error information\n");
3595                 goto err_info_fail;
3596         }
3597
3598         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3599                 netdev_err(netdev, "timeout waiting for error information\n");
3600                 goto err_info_fail;
3601         }
3602
3603         return;
3604
3605 err_info_fail:
3606         spin_lock_irqsave(&adapter->error_list_lock, flags);
3607         list_del(&error_buff->list);
3608         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3609
3610         kfree(error_buff->buff);
3611         kfree(error_buff);
3612 }
3613
3614 static void handle_error_indication(union ibmvnic_crq *crq,
3615                                     struct ibmvnic_adapter *adapter)
3616 {
3617         struct device *dev = &adapter->vdev->dev;
3618
3619         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3620                 crq->error_indication.flags
3621                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3622                 be32_to_cpu(crq->error_indication.error_id),
3623                 be16_to_cpu(crq->error_indication.error_cause));
3624
3625         if (be32_to_cpu(crq->error_indication.error_id))
3626                 request_error_information(adapter, crq);
3627
3628         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3629                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3630         else
3631                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3632 }
3633
3634 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3635                                  struct ibmvnic_adapter *adapter)
3636 {
3637         struct net_device *netdev = adapter->netdev;
3638         struct device *dev = &adapter->vdev->dev;
3639         long rc;
3640
3641         rc = crq->change_mac_addr_rsp.rc.code;
3642         if (rc) {
3643                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3644                 goto out;
3645         }
3646         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3647                ETH_ALEN);
3648 out:
3649         complete(&adapter->fw_done);
3650         return rc;
3651 }
3652
3653 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3654                                    struct ibmvnic_adapter *adapter)
3655 {
3656         struct device *dev = &adapter->vdev->dev;
3657         u64 *req_value;
3658         char *name;
3659
3660         atomic_dec(&adapter->running_cap_crqs);
3661         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3662         case REQ_TX_QUEUES:
3663                 req_value = &adapter->req_tx_queues;
3664                 name = "tx";
3665                 break;
3666         case REQ_RX_QUEUES:
3667                 req_value = &adapter->req_rx_queues;
3668                 name = "rx";
3669                 break;
3670         case REQ_RX_ADD_QUEUES:
3671                 req_value = &adapter->req_rx_add_queues;
3672                 name = "rx_add";
3673                 break;
3674         case REQ_TX_ENTRIES_PER_SUBCRQ:
3675                 req_value = &adapter->req_tx_entries_per_subcrq;
3676                 name = "tx_entries_per_subcrq";
3677                 break;
3678         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3679                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3680                 name = "rx_add_entries_per_subcrq";
3681                 break;
3682         case REQ_MTU:
3683                 req_value = &adapter->req_mtu;
3684                 name = "mtu";
3685                 break;
3686         case PROMISC_REQUESTED:
3687                 req_value = &adapter->promisc;
3688                 name = "promisc";
3689                 break;
3690         default:
3691                 dev_err(dev, "Got invalid cap request rsp %d\n",
3692                         crq->request_capability.capability);
3693                 return;
3694         }
3695
3696         switch (crq->request_capability_rsp.rc.code) {
3697         case SUCCESS:
3698                 break;
3699         case PARTIALSUCCESS:
3700                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3701                          *req_value,
3702                          (long int)be64_to_cpu(crq->request_capability_rsp.
3703                                                number), name);
3704
3705                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3706                     REQ_MTU) {
3707                         pr_err("mtu of %llu is not supported. Reverting.\n",
3708                                *req_value);
3709                         *req_value = adapter->fallback.mtu;
3710                 } else {
3711                         *req_value =
3712                                 be64_to_cpu(crq->request_capability_rsp.number);
3713                 }
3714
3715                 ibmvnic_send_req_caps(adapter, 1);
3716                 return;
3717         default:
3718                 dev_err(dev, "Error %d in request cap rsp\n",
3719                         crq->request_capability_rsp.rc.code);
3720                 return;
3721         }
3722
3723         /* Done receiving requested capabilities, query IP offload support */
3724         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3725                 union ibmvnic_crq newcrq;
3726                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3727                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3728                     &adapter->ip_offload_buf;
3729
3730                 adapter->wait_capability = false;
3731                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3732                                                          buf_sz,
3733                                                          DMA_FROM_DEVICE);
3734
3735                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3736                         if (!firmware_has_feature(FW_FEATURE_CMO))
3737                                 dev_err(dev, "Couldn't map offload buffer\n");
3738                         return;
3739                 }
3740
3741                 memset(&newcrq, 0, sizeof(newcrq));
3742                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3743                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3744                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3745                 newcrq.query_ip_offload.ioba =
3746                     cpu_to_be32(adapter->ip_offload_tok);
3747
3748                 ibmvnic_send_crq(adapter, &newcrq);
3749         }
3750 }
3751
3752 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3753                             struct ibmvnic_adapter *adapter)
3754 {
3755         struct device *dev = &adapter->vdev->dev;
3756         struct net_device *netdev = adapter->netdev;
3757         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3758         struct ibmvnic_login_buffer *login = adapter->login_buf;
3759         int i;
3760
3761         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3762                          DMA_BIDIRECTIONAL);
3763         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3764                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3765
3766         /* If the number of queues requested can't be allocated by the
3767          * server, the login response will return with code 1. We will need
3768          * to resend the login buffer with fewer queues requested.
3769          */
3770         if (login_rsp_crq->generic.rc.code) {
3771                 adapter->renegotiate = true;
3772                 complete(&adapter->init_done);
3773                 return 0;
3774         }
3775
3776         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3777
3778         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3779         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3780                 netdev_dbg(adapter->netdev, "%016lx\n",
3781                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3782         }
3783
3784         /* Sanity checks */
3785         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3786             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3787              adapter->req_rx_add_queues !=
3788              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3789                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3790                 ibmvnic_remove(adapter->vdev);
3791                 return -EIO;
3792         }
3793         release_login_buffer(adapter);
3794         complete(&adapter->init_done);
3795
3796         return 0;
3797 }
3798
3799 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3800                                      struct ibmvnic_adapter *adapter)
3801 {
3802         struct device *dev = &adapter->vdev->dev;
3803         long rc;
3804
3805         rc = crq->request_unmap_rsp.rc.code;
3806         if (rc)
3807                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3808 }
3809
3810 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3811                                  struct ibmvnic_adapter *adapter)
3812 {
3813         struct net_device *netdev = adapter->netdev;
3814         struct device *dev = &adapter->vdev->dev;
3815         long rc;
3816
3817         rc = crq->query_map_rsp.rc.code;
3818         if (rc) {
3819                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3820                 return;
3821         }
3822         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3823                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3824                    crq->query_map_rsp.free_pages);
3825 }
3826
3827 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3828                                  struct ibmvnic_adapter *adapter)
3829 {
3830         struct net_device *netdev = adapter->netdev;
3831         struct device *dev = &adapter->vdev->dev;
3832         long rc;
3833
3834         atomic_dec(&adapter->running_cap_crqs);
3835         netdev_dbg(netdev, "Outstanding queries: %d\n",
3836                    atomic_read(&adapter->running_cap_crqs));
3837         rc = crq->query_capability.rc.code;
3838         if (rc) {
3839                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3840                 goto out;
3841         }
3842
3843         switch (be16_to_cpu(crq->query_capability.capability)) {
3844         case MIN_TX_QUEUES:
3845                 adapter->min_tx_queues =
3846                     be64_to_cpu(crq->query_capability.number);
3847                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3848                            adapter->min_tx_queues);
3849                 break;
3850         case MIN_RX_QUEUES:
3851                 adapter->min_rx_queues =
3852                     be64_to_cpu(crq->query_capability.number);
3853                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3854                            adapter->min_rx_queues);
3855                 break;
3856         case MIN_RX_ADD_QUEUES:
3857                 adapter->min_rx_add_queues =
3858                     be64_to_cpu(crq->query_capability.number);
3859                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3860                            adapter->min_rx_add_queues);
3861                 break;
3862         case MAX_TX_QUEUES:
3863                 adapter->max_tx_queues =
3864                     be64_to_cpu(crq->query_capability.number);
3865                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3866                            adapter->max_tx_queues);
3867                 break;
3868         case MAX_RX_QUEUES:
3869                 adapter->max_rx_queues =
3870                     be64_to_cpu(crq->query_capability.number);
3871                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3872                            adapter->max_rx_queues);
3873                 break;
3874         case MAX_RX_ADD_QUEUES:
3875                 adapter->max_rx_add_queues =
3876                     be64_to_cpu(crq->query_capability.number);
3877                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3878                            adapter->max_rx_add_queues);
3879                 break;
3880         case MIN_TX_ENTRIES_PER_SUBCRQ:
3881                 adapter->min_tx_entries_per_subcrq =
3882                     be64_to_cpu(crq->query_capability.number);
3883                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3884                            adapter->min_tx_entries_per_subcrq);
3885                 break;
3886         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3887                 adapter->min_rx_add_entries_per_subcrq =
3888                     be64_to_cpu(crq->query_capability.number);
3889                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3890                            adapter->min_rx_add_entries_per_subcrq);
3891                 break;
3892         case MAX_TX_ENTRIES_PER_SUBCRQ:
3893                 adapter->max_tx_entries_per_subcrq =
3894                     be64_to_cpu(crq->query_capability.number);
3895                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3896                            adapter->max_tx_entries_per_subcrq);
3897                 break;
3898         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3899                 adapter->max_rx_add_entries_per_subcrq =
3900                     be64_to_cpu(crq->query_capability.number);
3901                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3902                            adapter->max_rx_add_entries_per_subcrq);
3903                 break;
3904         case TCP_IP_OFFLOAD:
3905                 adapter->tcp_ip_offload =
3906                     be64_to_cpu(crq->query_capability.number);
3907                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3908                            adapter->tcp_ip_offload);
3909                 break;
3910         case PROMISC_SUPPORTED:
3911                 adapter->promisc_supported =
3912                     be64_to_cpu(crq->query_capability.number);
3913                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3914                            adapter->promisc_supported);
3915                 break;
3916         case MIN_MTU:
3917                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3918                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3919                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3920                 break;
3921         case MAX_MTU:
3922                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3923                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3924                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3925                 break;
3926         case MAX_MULTICAST_FILTERS:
3927                 adapter->max_multicast_filters =
3928                     be64_to_cpu(crq->query_capability.number);
3929                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3930                            adapter->max_multicast_filters);
3931                 break;
3932         case VLAN_HEADER_INSERTION:
3933                 adapter->vlan_header_insertion =
3934                     be64_to_cpu(crq->query_capability.number);
3935                 if (adapter->vlan_header_insertion)
3936                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3937                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3938                            adapter->vlan_header_insertion);
3939                 break;
3940         case RX_VLAN_HEADER_INSERTION:
3941                 adapter->rx_vlan_header_insertion =
3942                     be64_to_cpu(crq->query_capability.number);
3943                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3944                            adapter->rx_vlan_header_insertion);
3945                 break;
3946         case MAX_TX_SG_ENTRIES:
3947                 adapter->max_tx_sg_entries =
3948                     be64_to_cpu(crq->query_capability.number);
3949                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3950                            adapter->max_tx_sg_entries);
3951                 break;
3952         case RX_SG_SUPPORTED:
3953                 adapter->rx_sg_supported =
3954                     be64_to_cpu(crq->query_capability.number);
3955                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3956                            adapter->rx_sg_supported);
3957                 break;
3958         case OPT_TX_COMP_SUB_QUEUES:
3959                 adapter->opt_tx_comp_sub_queues =
3960                     be64_to_cpu(crq->query_capability.number);
3961                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3962                            adapter->opt_tx_comp_sub_queues);
3963                 break;
3964         case OPT_RX_COMP_QUEUES:
3965                 adapter->opt_rx_comp_queues =
3966                     be64_to_cpu(crq->query_capability.number);
3967                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3968                            adapter->opt_rx_comp_queues);
3969                 break;
3970         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3971                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3972                     be64_to_cpu(crq->query_capability.number);
3973                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3974                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3975                 break;
3976         case OPT_TX_ENTRIES_PER_SUBCRQ:
3977                 adapter->opt_tx_entries_per_subcrq =
3978                     be64_to_cpu(crq->query_capability.number);
3979                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3980                            adapter->opt_tx_entries_per_subcrq);
3981                 break;
3982         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3983                 adapter->opt_rxba_entries_per_subcrq =
3984                     be64_to_cpu(crq->query_capability.number);
3985                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3986                            adapter->opt_rxba_entries_per_subcrq);
3987                 break;
3988         case TX_RX_DESC_REQ:
3989                 adapter->tx_rx_desc_req = crq->query_capability.number;
3990                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3991                            adapter->tx_rx_desc_req);
3992                 break;
3993
3994         default:
3995                 netdev_err(netdev, "Got invalid cap rsp %d\n",
3996                            crq->query_capability.capability);
3997         }
3998
3999 out:
4000         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4001                 adapter->wait_capability = false;
4002                 ibmvnic_send_req_caps(adapter, 0);
4003         }
4004 }
4005
4006 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4007                                struct ibmvnic_adapter *adapter)
4008 {
4009         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4010         struct net_device *netdev = adapter->netdev;
4011         struct device *dev = &adapter->vdev->dev;
4012         u64 *u64_crq = (u64 *)crq;
4013         long rc;
4014
4015         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4016                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4017                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4018         switch (gen_crq->first) {
4019         case IBMVNIC_CRQ_INIT_RSP:
4020                 switch (gen_crq->cmd) {
4021                 case IBMVNIC_CRQ_INIT:
4022                         dev_info(dev, "Partner initialized\n");
4023                         adapter->from_passive_init = true;
4024                         complete(&adapter->init_done);
4025                         break;
4026                 case IBMVNIC_CRQ_INIT_COMPLETE:
4027                         dev_info(dev, "Partner initialization complete\n");
4028                         send_version_xchg(adapter);
4029                         break;
4030                 default:
4031                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4032                 }
4033                 return;
4034         case IBMVNIC_CRQ_XPORT_EVENT:
4035                 netif_carrier_off(netdev);
4036                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4037                         dev_info(dev, "Migrated, re-enabling adapter\n");
4038                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4039                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4040                         dev_info(dev, "Backing device failover detected\n");
4041                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4042                 } else {
4043                         /* The adapter lost the connection */
4044                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4045                                 gen_crq->cmd);
4046                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4047                 }
4048                 return;
4049         case IBMVNIC_CRQ_CMD_RSP:
4050                 break;
4051         default:
4052                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4053                         gen_crq->first);
4054                 return;
4055         }
4056
4057         switch (gen_crq->cmd) {
4058         case VERSION_EXCHANGE_RSP:
4059                 rc = crq->version_exchange_rsp.rc.code;
4060                 if (rc) {
4061                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4062                         break;
4063                 }
4064                 dev_info(dev, "Partner protocol version is %d\n",
4065                          crq->version_exchange_rsp.version);
4066                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4067                     ibmvnic_version)
4068                         ibmvnic_version =
4069                             be16_to_cpu(crq->version_exchange_rsp.version);
4070                 send_cap_queries(adapter);
4071                 break;
4072         case QUERY_CAPABILITY_RSP:
4073                 handle_query_cap_rsp(crq, adapter);
4074                 break;
4075         case QUERY_MAP_RSP:
4076                 handle_query_map_rsp(crq, adapter);
4077                 break;
4078         case REQUEST_MAP_RSP:
4079                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4080                 complete(&adapter->fw_done);
4081                 break;
4082         case REQUEST_UNMAP_RSP:
4083                 handle_request_unmap_rsp(crq, adapter);
4084                 break;
4085         case REQUEST_CAPABILITY_RSP:
4086                 handle_request_cap_rsp(crq, adapter);
4087                 break;
4088         case LOGIN_RSP:
4089                 netdev_dbg(netdev, "Got Login Response\n");
4090                 handle_login_rsp(crq, adapter);
4091                 break;
4092         case LOGICAL_LINK_STATE_RSP:
4093                 netdev_dbg(netdev,
4094                            "Got Logical Link State Response, state: %d rc: %d\n",
4095                            crq->logical_link_state_rsp.link_state,
4096                            crq->logical_link_state_rsp.rc.code);
4097                 adapter->logical_link_state =
4098                     crq->logical_link_state_rsp.link_state;
4099                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4100                 complete(&adapter->init_done);
4101                 break;
4102         case LINK_STATE_INDICATION:
4103                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4104                 adapter->phys_link_state =
4105                     crq->link_state_indication.phys_link_state;
4106                 adapter->logical_link_state =
4107                     crq->link_state_indication.logical_link_state;
4108                 break;
4109         case CHANGE_MAC_ADDR_RSP:
4110                 netdev_dbg(netdev, "Got MAC address change Response\n");
4111                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4112                 break;
4113         case ERROR_INDICATION:
4114                 netdev_dbg(netdev, "Got Error Indication\n");
4115                 handle_error_indication(crq, adapter);
4116                 break;
4117         case REQUEST_ERROR_RSP:
4118                 netdev_dbg(netdev, "Got Error Detail Response\n");
4119                 handle_error_info_rsp(crq, adapter);
4120                 break;
4121         case REQUEST_STATISTICS_RSP:
4122                 netdev_dbg(netdev, "Got Statistics Response\n");
4123                 complete(&adapter->stats_done);
4124                 break;
4125         case QUERY_IP_OFFLOAD_RSP:
4126                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4127                 handle_query_ip_offload_rsp(adapter);
4128                 break;
4129         case MULTICAST_CTRL_RSP:
4130                 netdev_dbg(netdev, "Got multicast control Response\n");
4131                 break;
4132         case CONTROL_IP_OFFLOAD_RSP:
4133                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4134                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4135                                  sizeof(adapter->ip_offload_ctrl),
4136                                  DMA_TO_DEVICE);
4137                 complete(&adapter->init_done);
4138                 break;
4139         case COLLECT_FW_TRACE_RSP:
4140                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4141                 complete(&adapter->fw_done);
4142                 break;
4143         case GET_VPD_SIZE_RSP:
4144                 handle_vpd_size_rsp(crq, adapter);
4145                 break;
4146         case GET_VPD_RSP:
4147                 handle_vpd_rsp(crq, adapter);
4148                 break;
4149         default:
4150                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4151                            gen_crq->cmd);
4152         }
4153 }
4154
4155 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4156 {
4157         struct ibmvnic_adapter *adapter = instance;
4158
4159         tasklet_schedule(&adapter->tasklet);
4160         return IRQ_HANDLED;
4161 }
4162
4163 static void ibmvnic_tasklet(void *data)
4164 {
4165         struct ibmvnic_adapter *adapter = data;
4166         struct ibmvnic_crq_queue *queue = &adapter->crq;
4167         union ibmvnic_crq *crq;
4168         unsigned long flags;
4169         bool done = false;
4170
4171         spin_lock_irqsave(&queue->lock, flags);
4172         while (!done) {
4173                 /* Pull all the valid messages off the CRQ */
4174                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4175                         ibmvnic_handle_crq(crq, adapter);
4176                         crq->generic.first = 0;
4177                 }
4178
4179                 /* remain in tasklet until all
4180                  * capabilities responses are received
4181                  */
4182                 if (!adapter->wait_capability)
4183                         done = true;
4184         }
4185         /* if capabilities CRQ's were sent in this tasklet, the following
4186          * tasklet must wait until all responses are received
4187          */
4188         if (atomic_read(&adapter->running_cap_crqs) != 0)
4189                 adapter->wait_capability = true;
4190         spin_unlock_irqrestore(&queue->lock, flags);
4191 }
4192
4193 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4194 {
4195         struct vio_dev *vdev = adapter->vdev;
4196         int rc;
4197
4198         do {
4199                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4200         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4201
4202         if (rc)
4203                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4204
4205         return rc;
4206 }
4207
4208 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4209 {
4210         struct ibmvnic_crq_queue *crq = &adapter->crq;
4211         struct device *dev = &adapter->vdev->dev;
4212         struct vio_dev *vdev = adapter->vdev;
4213         int rc;
4214
4215         /* Close the CRQ */
4216         do {
4217                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4218         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4219
4220         /* Clean out the queue */
4221         memset(crq->msgs, 0, PAGE_SIZE);
4222         crq->cur = 0;
4223
4224         /* And re-open it again */
4225         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4226                                 crq->msg_token, PAGE_SIZE);
4227
4228         if (rc == H_CLOSED)
4229                 /* Adapter is good, but other end is not ready */
4230                 dev_warn(dev, "Partner adapter not ready\n");
4231         else if (rc != 0)
4232                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4233
4234         return rc;
4235 }
4236
4237 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4238 {
4239         struct ibmvnic_crq_queue *crq = &adapter->crq;
4240         struct vio_dev *vdev = adapter->vdev;
4241         long rc;
4242
4243         if (!crq->msgs)
4244                 return;
4245
4246         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4247         free_irq(vdev->irq, adapter);
4248         tasklet_kill(&adapter->tasklet);
4249         do {
4250                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4251         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4252
4253         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4254                          DMA_BIDIRECTIONAL);
4255         free_page((unsigned long)crq->msgs);
4256         crq->msgs = NULL;
4257 }
4258
4259 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4260 {
4261         struct ibmvnic_crq_queue *crq = &adapter->crq;
4262         struct device *dev = &adapter->vdev->dev;
4263         struct vio_dev *vdev = adapter->vdev;
4264         int rc, retrc = -ENOMEM;
4265
4266         if (crq->msgs)
4267                 return 0;
4268
4269         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4270         /* Should we allocate more than one page? */
4271
4272         if (!crq->msgs)
4273                 return -ENOMEM;
4274
4275         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4276         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4277                                         DMA_BIDIRECTIONAL);
4278         if (dma_mapping_error(dev, crq->msg_token))
4279                 goto map_failed;
4280
4281         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4282                                 crq->msg_token, PAGE_SIZE);
4283
4284         if (rc == H_RESOURCE)
4285                 /* maybe kexecing and resource is busy. try a reset */
4286                 rc = ibmvnic_reset_crq(adapter);
4287         retrc = rc;
4288
4289         if (rc == H_CLOSED) {
4290                 dev_warn(dev, "Partner adapter not ready\n");
4291         } else if (rc) {
4292                 dev_warn(dev, "Error %d opening adapter\n", rc);
4293                 goto reg_crq_failed;
4294         }
4295
4296         retrc = 0;
4297
4298         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4299                      (unsigned long)adapter);
4300
4301         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4302         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4303                          adapter);
4304         if (rc) {
4305                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4306                         vdev->irq, rc);
4307                 goto req_irq_failed;
4308         }
4309
4310         rc = vio_enable_interrupts(vdev);
4311         if (rc) {
4312                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4313                 goto req_irq_failed;
4314         }
4315
4316         crq->cur = 0;
4317         spin_lock_init(&crq->lock);
4318
4319         return retrc;
4320
4321 req_irq_failed:
4322         tasklet_kill(&adapter->tasklet);
4323         do {
4324                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4325         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4326 reg_crq_failed:
4327         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4328 map_failed:
4329         free_page((unsigned long)crq->msgs);
4330         crq->msgs = NULL;
4331         return retrc;
4332 }
4333
4334 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4335 {
4336         struct device *dev = &adapter->vdev->dev;
4337         unsigned long timeout = msecs_to_jiffies(30000);
4338         int rc;
4339
4340         if (adapter->resetting && !adapter->wait_for_reset) {
4341                 rc = ibmvnic_reset_crq(adapter);
4342                 if (!rc)
4343                         rc = vio_enable_interrupts(adapter->vdev);
4344         } else {
4345                 rc = init_crq_queue(adapter);
4346         }
4347
4348         if (rc) {
4349                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4350                 return rc;
4351         }
4352
4353         adapter->from_passive_init = false;
4354
4355         init_completion(&adapter->init_done);
4356         adapter->init_done_rc = 0;
4357         ibmvnic_send_crq_init(adapter);
4358         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4359                 dev_err(dev, "Initialization sequence timed out\n");
4360                 return -1;
4361         }
4362
4363         if (adapter->init_done_rc) {
4364                 release_crq_queue(adapter);
4365                 return adapter->init_done_rc;
4366         }
4367
4368         if (adapter->from_passive_init) {
4369                 adapter->state = VNIC_OPEN;
4370                 adapter->from_passive_init = false;
4371                 return -1;
4372         }
4373
4374         if (adapter->resetting && !adapter->wait_for_reset)
4375                 rc = reset_sub_crq_queues(adapter);
4376         else
4377                 rc = init_sub_crqs(adapter);
4378         if (rc) {
4379                 dev_err(dev, "Initialization of sub crqs failed\n");
4380                 release_crq_queue(adapter);
4381                 return rc;
4382         }
4383
4384         rc = init_sub_crq_irqs(adapter);
4385         if (rc) {
4386                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4387                 release_crq_queue(adapter);
4388         }
4389
4390         return rc;
4391 }
4392
4393 static struct device_attribute dev_attr_failover;
4394
4395 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4396 {
4397         struct ibmvnic_adapter *adapter;
4398         struct net_device *netdev;
4399         unsigned char *mac_addr_p;
4400         int rc;
4401
4402         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4403                 dev->unit_address);
4404
4405         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4406                                                         VETH_MAC_ADDR, NULL);
4407         if (!mac_addr_p) {
4408                 dev_err(&dev->dev,
4409                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4410                         __FILE__, __LINE__);
4411                 return 0;
4412         }
4413
4414         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4415                                    IBMVNIC_MAX_QUEUES);
4416         if (!netdev)
4417                 return -ENOMEM;
4418
4419         adapter = netdev_priv(netdev);
4420         adapter->state = VNIC_PROBING;
4421         dev_set_drvdata(&dev->dev, netdev);
4422         adapter->vdev = dev;
4423         adapter->netdev = netdev;
4424
4425         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4426         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4427         netdev->irq = dev->irq;
4428         netdev->netdev_ops = &ibmvnic_netdev_ops;
4429         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4430         SET_NETDEV_DEV(netdev, &dev->dev);
4431
4432         spin_lock_init(&adapter->stats_lock);
4433
4434         INIT_LIST_HEAD(&adapter->errors);
4435         spin_lock_init(&adapter->error_list_lock);
4436
4437         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4438         INIT_LIST_HEAD(&adapter->rwi_list);
4439         mutex_init(&adapter->reset_lock);
4440         mutex_init(&adapter->rwi_lock);
4441         adapter->resetting = false;
4442
4443         adapter->mac_change_pending = false;
4444
4445         do {
4446                 rc = ibmvnic_init(adapter);
4447                 if (rc && rc != EAGAIN)
4448                         goto ibmvnic_init_fail;
4449         } while (rc == EAGAIN);
4450
4451         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4452         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4453         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4454
4455         rc = device_create_file(&dev->dev, &dev_attr_failover);
4456         if (rc)
4457                 goto ibmvnic_init_fail;
4458
4459         netif_carrier_off(netdev);
4460         rc = register_netdev(netdev);
4461         if (rc) {
4462                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4463                 goto ibmvnic_register_fail;
4464         }
4465         dev_info(&dev->dev, "ibmvnic registered\n");
4466
4467         adapter->state = VNIC_PROBED;
4468
4469         adapter->wait_for_reset = false;
4470
4471         return 0;
4472
4473 ibmvnic_register_fail:
4474         device_remove_file(&dev->dev, &dev_attr_failover);
4475
4476 ibmvnic_init_fail:
4477         release_sub_crqs(adapter);
4478         release_crq_queue(adapter);
4479         free_netdev(netdev);
4480
4481         return rc;
4482 }
4483
4484 static int ibmvnic_remove(struct vio_dev *dev)
4485 {
4486         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4487         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4488
4489         adapter->state = VNIC_REMOVING;
4490         unregister_netdev(netdev);
4491         mutex_lock(&adapter->reset_lock);
4492
4493         release_resources(adapter);
4494         release_sub_crqs(adapter);
4495         release_crq_queue(adapter);
4496
4497         adapter->state = VNIC_REMOVED;
4498
4499         mutex_unlock(&adapter->reset_lock);
4500         device_remove_file(&dev->dev, &dev_attr_failover);
4501         free_netdev(netdev);
4502         dev_set_drvdata(&dev->dev, NULL);
4503
4504         return 0;
4505 }
4506
4507 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4508                               const char *buf, size_t count)
4509 {
4510         struct net_device *netdev = dev_get_drvdata(dev);
4511         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4512         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4513         __be64 session_token;
4514         long rc;
4515
4516         if (!sysfs_streq(buf, "1"))
4517                 return -EINVAL;
4518
4519         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4520                          H_GET_SESSION_TOKEN, 0, 0, 0);
4521         if (rc) {
4522                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4523                            rc);
4524                 return -EINVAL;
4525         }
4526
4527         session_token = (__be64)retbuf[0];
4528         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4529                    be64_to_cpu(session_token));
4530         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4531                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4532         if (rc) {
4533                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4534                            rc);
4535                 return -EINVAL;
4536         }
4537
4538         return count;
4539 }
4540
4541 static DEVICE_ATTR_WO(failover);
4542
4543 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4544 {
4545         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4546         struct ibmvnic_adapter *adapter;
4547         struct iommu_table *tbl;
4548         unsigned long ret = 0;
4549         int i;
4550
4551         tbl = get_iommu_table_base(&vdev->dev);
4552
4553         /* netdev inits at probe time along with the structures we need below*/
4554         if (!netdev)
4555                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4556
4557         adapter = netdev_priv(netdev);
4558
4559         ret += PAGE_SIZE; /* the crq message queue */
4560         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4561
4562         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4563                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4564
4565         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4566              i++)
4567                 ret += adapter->rx_pool[i].size *
4568                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4569
4570         return ret;
4571 }
4572
4573 static int ibmvnic_resume(struct device *dev)
4574 {
4575         struct net_device *netdev = dev_get_drvdata(dev);
4576         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4577
4578         if (adapter->state != VNIC_OPEN)
4579                 return 0;
4580
4581         tasklet_schedule(&adapter->tasklet);
4582
4583         return 0;
4584 }
4585
4586 static const struct vio_device_id ibmvnic_device_table[] = {
4587         {"network", "IBM,vnic"},
4588         {"", "" }
4589 };
4590 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4591
4592 static const struct dev_pm_ops ibmvnic_pm_ops = {
4593         .resume = ibmvnic_resume
4594 };
4595
4596 static struct vio_driver ibmvnic_driver = {
4597         .id_table       = ibmvnic_device_table,
4598         .probe          = ibmvnic_probe,
4599         .remove         = ibmvnic_remove,
4600         .get_desired_dma = ibmvnic_get_desired_dma,
4601         .name           = ibmvnic_driver_name,
4602         .pm             = &ibmvnic_pm_ops,
4603 };
4604
4605 /* module functions */
4606 static int __init ibmvnic_module_init(void)
4607 {
4608         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4609                 IBMVNIC_DRIVER_VERSION);
4610
4611         return vio_register_driver(&ibmvnic_driver);
4612 }
4613
4614 static void __exit ibmvnic_module_exit(void)
4615 {
4616         vio_unregister_driver(&ibmvnic_driver);
4617 }
4618
4619 module_init(ibmvnic_module_init);
4620 module_exit(ibmvnic_module_exit);