drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/if_arp.h>
  63 #include <linux/in.h>
  64 #include <linux/ip.h>
  65 #include <linux/ipv6.h>
  66 #include <linux/irq.h>
  67 #include <linux/kthread.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/workqueue.h>
  78 #include <linux/if_vlan.h>
  79 #include <linux/utsname.h>
  80
  81 #include "ibmvnic.h"
  82
  83 static const char ibmvnic_driver_name[] = "ibmvnic";
  84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  85
  86 MODULE_AUTHOR("Santiago Leon");
  87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  88 MODULE_LICENSE("GPL");
  89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  90
  91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  92 static int ibmvnic_remove(struct vio_dev *);
  93 static void release_sub_crqs(struct ibmvnic_adapter *, bool);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 114 static int send_login(struct ibmvnic_adapter *adapter);
 115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 116 static int init_sub_crqs(struct ibmvnic_adapter *);
 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 118 static int ibmvnic_init(struct ibmvnic_adapter *);
 119 static void release_crq_queue(struct ibmvnic_adapter *);
 120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
 121
 122 struct ibmvnic_stat {
 123         char name[ETH_GSTRING_LEN];
 124         int offset;
 125 };
 126
 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 128                              offsetof(struct ibmvnic_statistics, stat))
 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 130
 131 static const struct ibmvnic_stat ibmvnic_stats[] = {
 132         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 133         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 134         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 135         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 136         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 137         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 138         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 139         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 140         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 141         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 142         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 143         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 144         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 145         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 146         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 147         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 148         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 149         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 150         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 151         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 152         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 153         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 154 };
 155
 156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 157                           unsigned long length, unsigned long *number,
 158                           unsigned long *irq)
 159 {
 160         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 161         long rc;
 162
 163         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 164         *number = retbuf[0];
 165         *irq = retbuf[1];
 166
 167         return rc;
 168 }
 169
 170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 171                                 struct ibmvnic_long_term_buff *ltb, int size)
 172 {
 173         struct device *dev = &adapter->vdev->dev;
 174
 175         ltb->size = size;
 176         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 177                                        GFP_KERNEL);
 178
 179         if (!ltb->buff) {
 180                 dev_err(dev, "Couldn't alloc long term buffer\n");
 181                 return -ENOMEM;
 182         }
 183         ltb->map_id = adapter->map_id;
 184         adapter->map_id++;
 185
 186         init_completion(&adapter->fw_done);
 187         send_request_map(adapter, ltb->addr,
 188                          ltb->size, ltb->map_id);
 189         wait_for_completion(&adapter->fw_done);
 190
 191         if (adapter->fw_done_rc) {
 192                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 193                         adapter->fw_done_rc);
 194                 return -1;
 195         }
 196         return 0;
 197 }
 198
 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 200                                 struct ibmvnic_long_term_buff *ltb)
 201 {
 202         struct device *dev = &adapter->vdev->dev;
 203
 204         if (!ltb->buff)
 205                 return;
 206
 207         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 208             adapter->reset_reason != VNIC_RESET_MOBILITY)
 209                 send_request_unmap(adapter, ltb->map_id);
 210         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 211 }
 212
 213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 214                                 struct ibmvnic_long_term_buff *ltb)
 215 {
 216         memset(ltb->buff, 0, ltb->size);
 217
 218         init_completion(&adapter->fw_done);
 219         send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 220         wait_for_completion(&adapter->fw_done);
 221
 222         if (adapter->fw_done_rc) {
 223                 dev_info(&adapter->vdev->dev,
 224                          "Reset failed, attempting to free and reallocate buffer\n");
 225                 free_long_term_buff(adapter, ltb);
 226                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 227         }
 228         return 0;
 229 }
 230
 231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 232 {
 233         int i;
 234
 235         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 236              i++)
 237                 adapter->rx_pool[i].active = 0;
 238 }
 239
 240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 241                               struct ibmvnic_rx_pool *pool)
 242 {
 243         int count = pool->size - atomic_read(&pool->available);
 244         struct device *dev = &adapter->vdev->dev;
 245         int buffers_added = 0;
 246         unsigned long lpar_rc;
 247         union sub_crq sub_crq;
 248         struct sk_buff *skb;
 249         unsigned int offset;
 250         dma_addr_t dma_addr;
 251         unsigned char *dst;
 252         u64 *handle_array;
 253         int shift = 0;
 254         int index;
 255         int i;
 256
 257         if (!pool->active)
 258                 return;
 259
 260         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 261                                       be32_to_cpu(adapter->login_rsp_buf->
 262                                       off_rxadd_subcrqs));
 263
 264         for (i = 0; i < count; ++i) {
 265                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 266                 if (!skb) {
 267                         dev_err(dev, "Couldn't replenish rx buff\n");
 268                         adapter->replenish_no_mem++;
 269                         break;
 270                 }
 271
 272                 index = pool->free_map[pool->next_free];
 273
 274                 if (pool->rx_buff[index].skb)
 275                         dev_err(dev, "Inconsistent free_map!\n");
 276
 277                 /* Copy the skb to the long term mapped DMA buffer */
 278                 offset = index * pool->buff_size;
 279                 dst = pool->long_term_buff.buff + offset;
 280                 memset(dst, 0, pool->buff_size);
 281                 dma_addr = pool->long_term_buff.addr + offset;
 282                 pool->rx_buff[index].data = dst;
 283
 284                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 285                 pool->rx_buff[index].dma = dma_addr;
 286                 pool->rx_buff[index].skb = skb;
 287                 pool->rx_buff[index].pool_index = pool->index;
 288                 pool->rx_buff[index].size = pool->buff_size;
 289
 290                 memset(&sub_crq, 0, sizeof(sub_crq));
 291                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 292                 sub_crq.rx_add.correlator =
 293                     cpu_to_be64((u64)&pool->rx_buff[index]);
 294                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 295                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 296
 297                 /* The length field of the sCRQ is defined to be 24 bits so the
 298                  * buffer size needs to be left shifted by a byte before it is
 299                  * converted to big endian to prevent the last byte from being
 300                  * truncated.
 301                  */
 302 #ifdef __LITTLE_ENDIAN__
 303                 shift = 8;
 304 #endif
 305                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 306
 307                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 308                                       &sub_crq);
 309                 if (lpar_rc != H_SUCCESS)
 310                         goto failure;
 311
 312                 buffers_added++;
 313                 adapter->replenish_add_buff_success++;
 314                 pool->next_free = (pool->next_free + 1) % pool->size;
 315         }
 316         atomic_add(buffers_added, &pool->available);
 317         return;
 318
 319 failure:
 320         dev_info(dev, "replenish pools failure\n");
 321         pool->free_map[pool->next_free] = index;
 322         pool->rx_buff[index].skb = NULL;
 323         if (!dma_mapping_error(dev, dma_addr))
 324                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 325                                  DMA_FROM_DEVICE);
 326
 327         dev_kfree_skb_any(skb);
 328         adapter->replenish_add_buff_failure++;
 329         atomic_add(buffers_added, &pool->available);
 330
 331         if (lpar_rc == H_CLOSED) {
 332                 /* Disable buffer pool replenishment and report carrier off if
 333                  * queue is closed. Firmware guarantees that a signal will
 334                  * be sent to the driver, triggering a reset.
 335                  */
 336                 deactivate_rx_pools(adapter);
 337                 netif_carrier_off(adapter->netdev);
 338         }
 339 }
 340
 341 static void replenish_pools(struct ibmvnic_adapter *adapter)
 342 {
 343         int i;
 344
 345         adapter->replenish_task_cycles++;
 346         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 347              i++) {
 348                 if (adapter->rx_pool[i].active)
 349                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 350         }
 351 }
 352
 353 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 354 {
 355         kfree(adapter->tx_stats_buffers);
 356         kfree(adapter->rx_stats_buffers);
 357         adapter->tx_stats_buffers = NULL;
 358         adapter->rx_stats_buffers = NULL;
 359 }
 360
 361 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 362 {
 363         adapter->tx_stats_buffers =
 364                                 kcalloc(IBMVNIC_MAX_QUEUES,
 365                                         sizeof(struct ibmvnic_tx_queue_stats),
 366                                         GFP_KERNEL);
 367         if (!adapter->tx_stats_buffers)
 368                 return -ENOMEM;
 369
 370         adapter->rx_stats_buffers =
 371                                 kcalloc(IBMVNIC_MAX_QUEUES,
 372                                         sizeof(struct ibmvnic_rx_queue_stats),
 373                                         GFP_KERNEL);
 374         if (!adapter->rx_stats_buffers)
 375                 return -ENOMEM;
 376
 377         return 0;
 378 }
 379
 380 static void release_stats_token(struct ibmvnic_adapter *adapter)
 381 {
 382         struct device *dev = &adapter->vdev->dev;
 383
 384         if (!adapter->stats_token)
 385                 return;
 386
 387         dma_unmap_single(dev, adapter->stats_token,
 388                          sizeof(struct ibmvnic_statistics),
 389                          DMA_FROM_DEVICE);
 390         adapter->stats_token = 0;
 391 }
 392
 393 static int init_stats_token(struct ibmvnic_adapter *adapter)
 394 {
 395         struct device *dev = &adapter->vdev->dev;
 396         dma_addr_t stok;
 397
 398         stok = dma_map_single(dev, &adapter->stats,
 399                               sizeof(struct ibmvnic_statistics),
 400                               DMA_FROM_DEVICE);
 401         if (dma_mapping_error(dev, stok)) {
 402                 dev_err(dev, "Couldn't map stats buffer\n");
 403                 return -1;
 404         }
 405
 406         adapter->stats_token = stok;
 407         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 408         return 0;
 409 }
 410
 411 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 412 {
 413         struct ibmvnic_rx_pool *rx_pool;
 414         int rx_scrqs;
 415         int i, j, rc;
 416         u64 *size_array;
 417
 418         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 419                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 420
 421         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 422         for (i = 0; i < rx_scrqs; i++) {
 423                 rx_pool = &adapter->rx_pool[i];
 424
 425                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 426
 427                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 428                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 429                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 430                         alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 431                                              rx_pool->size *
 432                                              rx_pool->buff_size);
 433                 } else {
 434                         rc = reset_long_term_buff(adapter,
 435                                                   &rx_pool->long_term_buff);
 436                 }
 437
 438                 if (rc)
 439                         return rc;
 440
 441                 for (j = 0; j < rx_pool->size; j++)
 442                         rx_pool->free_map[j] = j;
 443
 444                 memset(rx_pool->rx_buff, 0,
 445                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 446
 447                 atomic_set(&rx_pool->available, 0);
 448                 rx_pool->next_alloc = 0;
 449                 rx_pool->next_free = 0;
 450                 rx_pool->active = 1;
 451         }
 452
 453         return 0;
 454 }
 455
 456 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 457 {
 458         struct ibmvnic_rx_pool *rx_pool;
 459         int i, j;
 460
 461         if (!adapter->rx_pool)
 462                 return;
 463
 464         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 465                 rx_pool = &adapter->rx_pool[i];
 466
 467                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 468
 469                 kfree(rx_pool->free_map);
 470                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 471
 472                 if (!rx_pool->rx_buff)
 473                         continue;
 474
 475                 for (j = 0; j < rx_pool->size; j++) {
 476                         if (rx_pool->rx_buff[j].skb) {
 477                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 478                                 rx_pool->rx_buff[i].skb = NULL;
 479                         }
 480                 }
 481
 482                 kfree(rx_pool->rx_buff);
 483         }
 484
 485         kfree(adapter->rx_pool);
 486         adapter->rx_pool = NULL;
 487         adapter->num_active_rx_pools = 0;
 488 }
 489
 490 static int init_rx_pools(struct net_device *netdev)
 491 {
 492         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 493         struct device *dev = &adapter->vdev->dev;
 494         struct ibmvnic_rx_pool *rx_pool;
 495         int rxadd_subcrqs;
 496         u64 *size_array;
 497         int i, j;
 498
 499         rxadd_subcrqs =
 500                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 501         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 502                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 503
 504         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 505                                    sizeof(struct ibmvnic_rx_pool),
 506                                    GFP_KERNEL);
 507         if (!adapter->rx_pool) {
 508                 dev_err(dev, "Failed to allocate rx pools\n");
 509                 return -1;
 510         }
 511
 512         adapter->num_active_rx_pools = rxadd_subcrqs;
 513
 514         for (i = 0; i < rxadd_subcrqs; i++) {
 515                 rx_pool = &adapter->rx_pool[i];
 516
 517                 netdev_dbg(adapter->netdev,
 518                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 519                            i, adapter->req_rx_add_entries_per_subcrq,
 520                            be64_to_cpu(size_array[i]));
 521
 522                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 523                 rx_pool->index = i;
 524                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 525                 rx_pool->active = 1;
 526
 527                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 528                                             GFP_KERNEL);
 529                 if (!rx_pool->free_map) {
 530                         release_rx_pools(adapter);
 531                         return -1;
 532                 }
 533
 534                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 535                                            sizeof(struct ibmvnic_rx_buff),
 536                                            GFP_KERNEL);
 537                 if (!rx_pool->rx_buff) {
 538                         dev_err(dev, "Couldn't alloc rx buffers\n");
 539                         release_rx_pools(adapter);
 540                         return -1;
 541                 }
 542
 543                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 544                                          rx_pool->size * rx_pool->buff_size)) {
 545                         release_rx_pools(adapter);
 546                         return -1;
 547                 }
 548
 549                 for (j = 0; j < rx_pool->size; ++j)
 550                         rx_pool->free_map[j] = j;
 551
 552                 atomic_set(&rx_pool->available, 0);
 553                 rx_pool->next_alloc = 0;
 554                 rx_pool->next_free = 0;
 555         }
 556
 557         return 0;
 558 }
 559
 560 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 561 {
 562         struct ibmvnic_tx_pool *tx_pool;
 563         int tx_scrqs;
 564         int i, j, rc;
 565
 566         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 567         for (i = 0; i < tx_scrqs; i++) {
 568                 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
 569
 570                 tx_pool = &adapter->tx_pool[i];
 571
 572                 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 573                 if (rc)
 574                         return rc;
 575
 576                 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
 577                 if (rc)
 578                         return rc;
 579
 580                 memset(tx_pool->tx_buff, 0,
 581                        adapter->req_tx_entries_per_subcrq *
 582                        sizeof(struct ibmvnic_tx_buff));
 583
 584                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 585                         tx_pool->free_map[j] = j;
 586
 587                 tx_pool->consumer_index = 0;
 588                 tx_pool->producer_index = 0;
 589                 tx_pool->tso_index = 0;
 590         }
 591
 592         return 0;
 593 }
 594
 595 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 596 {
 597         if (!adapter->vpd)
 598                 return;
 599
 600         kfree(adapter->vpd->buff);
 601         kfree(adapter->vpd);
 602
 603         adapter->vpd = NULL;
 604 }
 605
 606 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 607 {
 608         struct ibmvnic_tx_pool *tx_pool;
 609         int i;
 610
 611         if (!adapter->tx_pool)
 612                 return;
 613
 614         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 615                 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
 616                 tx_pool = &adapter->tx_pool[i];
 617                 kfree(tx_pool->tx_buff);
 618                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 619                 free_long_term_buff(adapter, &tx_pool->tso_ltb);
 620                 kfree(tx_pool->free_map);
 621         }
 622
 623         kfree(adapter->tx_pool);
 624         adapter->tx_pool = NULL;
 625         adapter->num_active_tx_pools = 0;
 626 }
 627
 628 static int init_tx_pools(struct net_device *netdev)
 629 {
 630         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 631         struct device *dev = &adapter->vdev->dev;
 632         struct ibmvnic_tx_pool *tx_pool;
 633         int tx_subcrqs;
 634         int i, j;
 635
 636         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 637         adapter->tx_pool = kcalloc(tx_subcrqs,
 638                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 639         if (!adapter->tx_pool)
 640                 return -1;
 641
 642         adapter->num_active_tx_pools = tx_subcrqs;
 643
 644         for (i = 0; i < tx_subcrqs; i++) {
 645                 tx_pool = &adapter->tx_pool[i];
 646
 647                 netdev_dbg(adapter->netdev,
 648                            "Initializing tx_pool[%d], %lld buffs\n",
 649                            i, adapter->req_tx_entries_per_subcrq);
 650
 651                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 652                                            sizeof(struct ibmvnic_tx_buff),
 653                                            GFP_KERNEL);
 654                 if (!tx_pool->tx_buff) {
 655                         dev_err(dev, "tx pool buffer allocation failed\n");
 656                         release_tx_pools(adapter);
 657                         return -1;
 658                 }
 659
 660                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 661                                          adapter->req_tx_entries_per_subcrq *
 662                                          (adapter->req_mtu + VLAN_HLEN))) {
 663                         release_tx_pools(adapter);
 664                         return -1;
 665                 }
 666
 667                 /* alloc TSO ltb */
 668                 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
 669                                          IBMVNIC_TSO_BUFS *
 670                                          IBMVNIC_TSO_BUF_SZ)) {
 671                         release_tx_pools(adapter);
 672                         return -1;
 673                 }
 674
 675                 tx_pool->tso_index = 0;
 676
 677                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 678                                             sizeof(int), GFP_KERNEL);
 679                 if (!tx_pool->free_map) {
 680                         release_tx_pools(adapter);
 681                         return -1;
 682                 }
 683
 684                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 685                         tx_pool->free_map[j] = j;
 686
 687                 tx_pool->consumer_index = 0;
 688                 tx_pool->producer_index = 0;
 689         }
 690
 691         return 0;
 692 }
 693
 694 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 695 {
 696         struct device *dev = &adapter->vdev->dev;
 697         struct ibmvnic_error_buff *error_buff, *tmp;
 698         unsigned long flags;
 699
 700         spin_lock_irqsave(&adapter->error_list_lock, flags);
 701         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 702                 list_del(&error_buff->list);
 703                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 704                                  DMA_FROM_DEVICE);
 705                 kfree(error_buff->buff);
 706                 kfree(error_buff);
 707         }
 708         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 709 }
 710
 711 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 712 {
 713         int i;
 714
 715         if (adapter->napi_enabled)
 716                 return;
 717
 718         for (i = 0; i < adapter->req_rx_queues; i++)
 719                 napi_enable(&adapter->napi[i]);
 720
 721         adapter->napi_enabled = true;
 722 }
 723
 724 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 725 {
 726         int i;
 727
 728         if (!adapter->napi_enabled)
 729                 return;
 730
 731         for (i = 0; i < adapter->req_rx_queues; i++) {
 732                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 733                 napi_disable(&adapter->napi[i]);
 734         }
 735
 736         adapter->napi_enabled = false;
 737 }
 738
 739 static int init_napi(struct ibmvnic_adapter *adapter)
 740 {
 741         int i;
 742
 743         adapter->napi = kcalloc(adapter->req_rx_queues,
 744                                 sizeof(struct napi_struct), GFP_KERNEL);
 745         if (!adapter->napi)
 746                 return -ENOMEM;
 747
 748         for (i = 0; i < adapter->req_rx_queues; i++) {
 749                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 750                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 751                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 752         }
 753
 754         adapter->num_active_rx_napi = adapter->req_rx_queues;
 755         return 0;
 756 }
 757
 758 static void release_napi(struct ibmvnic_adapter *adapter)
 759 {
 760         int i;
 761
 762         if (!adapter->napi)
 763                 return;
 764
 765         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 766                 if (&adapter->napi[i]) {
 767                         netdev_dbg(adapter->netdev,
 768                                    "Releasing napi[%d]\n", i);
 769                         netif_napi_del(&adapter->napi[i]);
 770                 }
 771         }
 772
 773         kfree(adapter->napi);
 774         adapter->napi = NULL;
 775         adapter->num_active_rx_napi = 0;
 776 }
 777
 778 static int ibmvnic_login(struct net_device *netdev)
 779 {
 780         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 781         unsigned long timeout = msecs_to_jiffies(30000);
 782         struct device *dev = &adapter->vdev->dev;
 783         int rc;
 784
 785         do {
 786                 if (adapter->renegotiate) {
 787                         adapter->renegotiate = false;
 788                         release_sub_crqs(adapter, 1);
 789
 790                         reinit_completion(&adapter->init_done);
 791                         send_cap_queries(adapter);
 792                         if (!wait_for_completion_timeout(&adapter->init_done,
 793                                                          timeout)) {
 794                                 dev_err(dev, "Capabilities query timeout\n");
 795                                 return -1;
 796                         }
 797                         rc = init_sub_crqs(adapter);
 798                         if (rc) {
 799                                 dev_err(dev,
 800                                         "Initialization of SCRQ's failed\n");
 801                                 return -1;
 802                         }
 803                         rc = init_sub_crq_irqs(adapter);
 804                         if (rc) {
 805                                 dev_err(dev,
 806                                         "Initialization of SCRQ's irqs failed\n");
 807                                 return -1;
 808                         }
 809                 }
 810
 811                 reinit_completion(&adapter->init_done);
 812                 rc = send_login(adapter);
 813                 if (rc) {
 814                         dev_err(dev, "Unable to attempt device login\n");
 815                         return rc;
 816                 } else if (!wait_for_completion_timeout(&adapter->init_done,
 817                                                  timeout)) {
 818                         dev_err(dev, "Login timeout\n");
 819                         return -1;
 820                 }
 821         } while (adapter->renegotiate);
 822
 823         /* handle pending MAC address changes after successful login */
 824         if (adapter->mac_change_pending) {
 825                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 826                 adapter->mac_change_pending = false;
 827         }
 828
 829         return 0;
 830 }
 831
 832 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 833 {
 834         kfree(adapter->login_buf);
 835         adapter->login_buf = NULL;
 836 }
 837
 838 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 839 {
 840         kfree(adapter->login_rsp_buf);
 841         adapter->login_rsp_buf = NULL;
 842 }
 843
 844 static void release_resources(struct ibmvnic_adapter *adapter)
 845 {
 846         release_vpd_data(adapter);
 847
 848         release_tx_pools(adapter);
 849         release_rx_pools(adapter);
 850
 851         release_error_buffers(adapter);
 852         release_napi(adapter);
 853         release_login_rsp_buffer(adapter);
 854 }
 855
 856 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 857 {
 858         struct net_device *netdev = adapter->netdev;
 859         unsigned long timeout = msecs_to_jiffies(30000);
 860         union ibmvnic_crq crq;
 861         bool resend;
 862         int rc;
 863
 864         netdev_dbg(netdev, "setting link state %d\n", link_state);
 865
 866         memset(&crq, 0, sizeof(crq));
 867         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 868         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 869         crq.logical_link_state.link_state = link_state;
 870
 871         do {
 872                 resend = false;
 873
 874                 reinit_completion(&adapter->init_done);
 875                 rc = ibmvnic_send_crq(adapter, &crq);
 876                 if (rc) {
 877                         netdev_err(netdev, "Failed to set link state\n");
 878                         return rc;
 879                 }
 880
 881                 if (!wait_for_completion_timeout(&adapter->init_done,
 882                                                  timeout)) {
 883                         netdev_err(netdev, "timeout setting link state\n");
 884                         return -1;
 885                 }
 886
 887                 if (adapter->init_done_rc == 1) {
 888                         /* Partuial success, delay and re-send */
 889                         mdelay(1000);
 890                         resend = true;
 891                 }
 892         } while (resend);
 893
 894         return 0;
 895 }
 896
 897 static int set_real_num_queues(struct net_device *netdev)
 898 {
 899         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 900         int rc;
 901
 902         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 903                    adapter->req_tx_queues, adapter->req_rx_queues);
 904
 905         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 906         if (rc) {
 907                 netdev_err(netdev, "failed to set the number of tx queues\n");
 908                 return rc;
 909         }
 910
 911         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 912         if (rc)
 913                 netdev_err(netdev, "failed to set the number of rx queues\n");
 914
 915         return rc;
 916 }
 917
 918 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 919 {
 920         struct device *dev = &adapter->vdev->dev;
 921         union ibmvnic_crq crq;
 922         int len = 0;
 923
 924         if (adapter->vpd->buff)
 925                 len = adapter->vpd->len;
 926
 927         init_completion(&adapter->fw_done);
 928         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 929         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 930         ibmvnic_send_crq(adapter, &crq);
 931         wait_for_completion(&adapter->fw_done);
 932
 933         if (!adapter->vpd->len)
 934                 return -ENODATA;
 935
 936         if (!adapter->vpd->buff)
 937                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 938         else if (adapter->vpd->len != len)
 939                 adapter->vpd->buff =
 940                         krealloc(adapter->vpd->buff,
 941                                  adapter->vpd->len, GFP_KERNEL);
 942
 943         if (!adapter->vpd->buff) {
 944                 dev_err(dev, "Could allocate VPD buffer\n");
 945                 return -ENOMEM;
 946         }
 947
 948         adapter->vpd->dma_addr =
 949                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 950                                DMA_FROM_DEVICE);
 951         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 952                 dev_err(dev, "Could not map VPD buffer\n");
 953                 kfree(adapter->vpd->buff);
 954                 adapter->vpd->buff = NULL;
 955                 return -ENOMEM;
 956         }
 957
 958         reinit_completion(&adapter->fw_done);
 959         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 960         crq.get_vpd.cmd = GET_VPD;
 961         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 962         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
 963         ibmvnic_send_crq(adapter, &crq);
 964         wait_for_completion(&adapter->fw_done);
 965
 966         return 0;
 967 }
 968
 969 static int init_resources(struct ibmvnic_adapter *adapter)
 970 {
 971         struct net_device *netdev = adapter->netdev;
 972         int rc;
 973
 974         rc = set_real_num_queues(netdev);
 975         if (rc)
 976                 return rc;
 977
 978         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
 979         if (!adapter->vpd)
 980                 return -ENOMEM;
 981
 982         /* Vital Product Data (VPD) */
 983         rc = ibmvnic_get_vpd(adapter);
 984         if (rc) {
 985                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
 986                 return rc;
 987         }
 988
 989         adapter->map_id = 1;
 990
 991         rc = init_napi(adapter);
 992         if (rc)
 993                 return rc;
 994
 995         send_map_query(adapter);
 996
 997         rc = init_rx_pools(netdev);
 998         if (rc)
 999                 return rc;
1000
1001         rc = init_tx_pools(netdev);
1002         return rc;
1003 }
1004
1005 static int __ibmvnic_open(struct net_device *netdev)
1006 {
1007         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1008         enum vnic_state prev_state = adapter->state;
1009         int i, rc;
1010
1011         adapter->state = VNIC_OPENING;
1012         replenish_pools(adapter);
1013         ibmvnic_napi_enable(adapter);
1014
1015         /* We're ready to receive frames, enable the sub-crq interrupts and
1016          * set the logical link state to up
1017          */
1018         for (i = 0; i < adapter->req_rx_queues; i++) {
1019                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1020                 if (prev_state == VNIC_CLOSED)
1021                         enable_irq(adapter->rx_scrq[i]->irq);
1022                 else
1023                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1024         }
1025
1026         for (i = 0; i < adapter->req_tx_queues; i++) {
1027                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1028                 if (prev_state == VNIC_CLOSED)
1029                         enable_irq(adapter->tx_scrq[i]->irq);
1030                 else
1031                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1032         }
1033
1034         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1035         if (rc) {
1036                 for (i = 0; i < adapter->req_rx_queues; i++)
1037                         napi_disable(&adapter->napi[i]);
1038                 release_resources(adapter);
1039                 return rc;
1040         }
1041
1042         netif_tx_start_all_queues(netdev);
1043
1044         if (prev_state == VNIC_CLOSED) {
1045                 for (i = 0; i < adapter->req_rx_queues; i++)
1046                         napi_schedule(&adapter->napi[i]);
1047         }
1048
1049         adapter->state = VNIC_OPEN;
1050         return rc;
1051 }
1052
1053 static int ibmvnic_open(struct net_device *netdev)
1054 {
1055         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1056         int rc;
1057
1058         mutex_lock(&adapter->reset_lock);
1059
1060         if (adapter->state != VNIC_CLOSED) {
1061                 rc = ibmvnic_login(netdev);
1062                 if (rc) {
1063                         mutex_unlock(&adapter->reset_lock);
1064                         return rc;
1065                 }
1066
1067                 rc = init_resources(adapter);
1068                 if (rc) {
1069                         netdev_err(netdev, "failed to initialize resources\n");
1070                         release_resources(adapter);
1071                         mutex_unlock(&adapter->reset_lock);
1072                         return rc;
1073                 }
1074         }
1075
1076         rc = __ibmvnic_open(netdev);
1077         netif_carrier_on(netdev);
1078
1079         mutex_unlock(&adapter->reset_lock);
1080
1081         return rc;
1082 }
1083
1084 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1085 {
1086         struct ibmvnic_rx_pool *rx_pool;
1087         struct ibmvnic_rx_buff *rx_buff;
1088         u64 rx_entries;
1089         int rx_scrqs;
1090         int i, j;
1091
1092         if (!adapter->rx_pool)
1093                 return;
1094
1095         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
1096         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1097
1098         /* Free any remaining skbs in the rx buffer pools */
1099         for (i = 0; i < rx_scrqs; i++) {
1100                 rx_pool = &adapter->rx_pool[i];
1101                 if (!rx_pool || !rx_pool->rx_buff)
1102                         continue;
1103
1104                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1105                 for (j = 0; j < rx_entries; j++) {
1106                         rx_buff = &rx_pool->rx_buff[j];
1107                         if (rx_buff && rx_buff->skb) {
1108                                 dev_kfree_skb_any(rx_buff->skb);
1109                                 rx_buff->skb = NULL;
1110                         }
1111                 }
1112         }
1113 }
1114
1115 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1116 {
1117         struct ibmvnic_tx_pool *tx_pool;
1118         struct ibmvnic_tx_buff *tx_buff;
1119         u64 tx_entries;
1120         int tx_scrqs;
1121         int i, j;
1122
1123         if (!adapter->tx_pool)
1124                 return;
1125
1126         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1127         tx_entries = adapter->req_tx_entries_per_subcrq;
1128
1129         /* Free any remaining skbs in the tx buffer pools */
1130         for (i = 0; i < tx_scrqs; i++) {
1131                 tx_pool = &adapter->tx_pool[i];
1132                 if (!tx_pool && !tx_pool->tx_buff)
1133                         continue;
1134
1135                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1136                 for (j = 0; j < tx_entries; j++) {
1137                         tx_buff = &tx_pool->tx_buff[j];
1138                         if (tx_buff && tx_buff->skb) {
1139                                 dev_kfree_skb_any(tx_buff->skb);
1140                                 tx_buff->skb = NULL;
1141                         }
1142                 }
1143         }
1144 }
1145
1146 static void ibmvnic_cleanup(struct net_device *netdev)
1147 {
1148         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1149         int i;
1150
1151         /* ensure that transmissions are stopped if called by do_reset */
1152         if (adapter->resetting)
1153                 netif_tx_disable(netdev);
1154         else
1155                 netif_tx_stop_all_queues(netdev);
1156
1157         ibmvnic_napi_disable(adapter);
1158
1159         if (adapter->tx_scrq) {
1160                 for (i = 0; i < adapter->req_tx_queues; i++)
1161                         if (adapter->tx_scrq[i]->irq) {
1162                                 netdev_dbg(netdev,
1163                                            "Disabling tx_scrq[%d] irq\n", i);
1164                                 disable_irq(adapter->tx_scrq[i]->irq);
1165                         }
1166         }
1167
1168         if (adapter->rx_scrq) {
1169                 for (i = 0; i < adapter->req_rx_queues; i++) {
1170                         if (adapter->rx_scrq[i]->irq) {
1171                                 netdev_dbg(netdev,
1172                                            "Disabling rx_scrq[%d] irq\n", i);
1173                                 disable_irq(adapter->rx_scrq[i]->irq);
1174                         }
1175                 }
1176         }
1177         clean_rx_pools(adapter);
1178         clean_tx_pools(adapter);
1179 }
1180
1181 static int __ibmvnic_close(struct net_device *netdev)
1182 {
1183         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1184         int rc = 0;
1185
1186         adapter->state = VNIC_CLOSING;
1187         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1188         if (rc)
1189                 return rc;
1190         ibmvnic_cleanup(netdev);
1191         adapter->state = VNIC_CLOSED;
1192         return 0;
1193 }
1194
1195 static int ibmvnic_close(struct net_device *netdev)
1196 {
1197         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1198         int rc;
1199
1200         mutex_lock(&adapter->reset_lock);
1201         rc = __ibmvnic_close(netdev);
1202         mutex_unlock(&adapter->reset_lock);
1203
1204         return rc;
1205 }
1206
1207 /**
1208  * build_hdr_data - creates L2/L3/L4 header data buffer
1209  * @hdr_field - bitfield determining needed headers
1210  * @skb - socket buffer
1211  * @hdr_len - array of header lengths
1212  * @tot_len - total length of data
1213  *
1214  * Reads hdr_field to determine which headers are needed by firmware.
1215  * Builds a buffer containing these headers.  Saves individual header
1216  * lengths and total buffer length to be used to build descriptors.
1217  */
1218 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1219                           int *hdr_len, u8 *hdr_data)
1220 {
1221         int len = 0;
1222         u8 *hdr;
1223
1224         if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1225                 hdr_len[0] = sizeof(struct vlan_ethhdr);
1226         else
1227                 hdr_len[0] = sizeof(struct ethhdr);
1228
1229         if (skb->protocol == htons(ETH_P_IP)) {
1230                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1231                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1232                         hdr_len[2] = tcp_hdrlen(skb);
1233                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1234                         hdr_len[2] = sizeof(struct udphdr);
1235         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1236                 hdr_len[1] = sizeof(struct ipv6hdr);
1237                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1238                         hdr_len[2] = tcp_hdrlen(skb);
1239                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1240                         hdr_len[2] = sizeof(struct udphdr);
1241         } else if (skb->protocol == htons(ETH_P_ARP)) {
1242                 hdr_len[1] = arp_hdr_len(skb->dev);
1243                 hdr_len[2] = 0;
1244         }
1245
1246         memset(hdr_data, 0, 120);
1247         if ((hdr_field >> 6) & 1) {
1248                 hdr = skb_mac_header(skb);
1249                 memcpy(hdr_data, hdr, hdr_len[0]);
1250                 len += hdr_len[0];
1251         }
1252
1253         if ((hdr_field >> 5) & 1) {
1254                 hdr = skb_network_header(skb);
1255                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1256                 len += hdr_len[1];
1257         }
1258
1259         if ((hdr_field >> 4) & 1) {
1260                 hdr = skb_transport_header(skb);
1261                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1262                 len += hdr_len[2];
1263         }
1264         return len;
1265 }
1266
1267 /**
1268  * create_hdr_descs - create header and header extension descriptors
1269  * @hdr_field - bitfield determining needed headers
1270  * @data - buffer containing header data
1271  * @len - length of data buffer
1272  * @hdr_len - array of individual header lengths
1273  * @scrq_arr - descriptor array
1274  *
1275  * Creates header and, if needed, header extension descriptors and
1276  * places them in a descriptor array, scrq_arr
1277  */
1278
1279 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1280                             union sub_crq *scrq_arr)
1281 {
1282         union sub_crq hdr_desc;
1283         int tmp_len = len;
1284         int num_descs = 0;
1285         u8 *data, *cur;
1286         int tmp;
1287
1288         while (tmp_len > 0) {
1289                 cur = hdr_data + len - tmp_len;
1290
1291                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1292                 if (cur != hdr_data) {
1293                         data = hdr_desc.hdr_ext.data;
1294                         tmp = tmp_len > 29 ? 29 : tmp_len;
1295                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1296                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1297                         hdr_desc.hdr_ext.len = tmp;
1298                 } else {
1299                         data = hdr_desc.hdr.data;
1300                         tmp = tmp_len > 24 ? 24 : tmp_len;
1301                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1302                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1303                         hdr_desc.hdr.len = tmp;
1304                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1305                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1306                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1307                         hdr_desc.hdr.flag = hdr_field << 1;
1308                 }
1309                 memcpy(data, cur, tmp);
1310                 tmp_len -= tmp;
1311                 *scrq_arr = hdr_desc;
1312                 scrq_arr++;
1313                 num_descs++;
1314         }
1315
1316         return num_descs;
1317 }
1318
1319 /**
1320  * build_hdr_descs_arr - build a header descriptor array
1321  * @skb - socket buffer
1322  * @num_entries - number of descriptors to be sent
1323  * @subcrq - first TX descriptor
1324  * @hdr_field - bit field determining which headers will be sent
1325  *
1326  * This function will build a TX descriptor array with applicable
1327  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1328  */
1329
1330 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1331                                 int *num_entries, u8 hdr_field)
1332 {
1333         int hdr_len[3] = {0, 0, 0};
1334         int tot_len;
1335         u8 *hdr_data = txbuff->hdr_data;
1336
1337         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1338                                  txbuff->hdr_data);
1339         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1340                          txbuff->indir_arr + 1);
1341 }
1342
1343 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1344 {
1345         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1346         int queue_num = skb_get_queue_mapping(skb);
1347         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1348         struct device *dev = &adapter->vdev->dev;
1349         struct ibmvnic_tx_buff *tx_buff = NULL;
1350         struct ibmvnic_sub_crq_queue *tx_scrq;
1351         struct ibmvnic_tx_pool *tx_pool;
1352         unsigned int tx_send_failed = 0;
1353         unsigned int tx_map_failed = 0;
1354         unsigned int tx_dropped = 0;
1355         unsigned int tx_packets = 0;
1356         unsigned int tx_bytes = 0;
1357         dma_addr_t data_dma_addr;
1358         struct netdev_queue *txq;
1359         unsigned long lpar_rc;
1360         union sub_crq tx_crq;
1361         unsigned int offset;
1362         int num_entries = 1;
1363         unsigned char *dst;
1364         u64 *handle_array;
1365         int index = 0;
1366         u8 proto = 0;
1367         int ret = 0;
1368
1369         if (adapter->resetting) {
1370                 if (!netif_subqueue_stopped(netdev, skb))
1371                         netif_stop_subqueue(netdev, queue_num);
1372                 dev_kfree_skb_any(skb);
1373
1374                 tx_send_failed++;
1375                 tx_dropped++;
1376                 ret = NETDEV_TX_OK;
1377                 goto out;
1378         }
1379
1380         tx_pool = &adapter->tx_pool[queue_num];
1381         tx_scrq = adapter->tx_scrq[queue_num];
1382         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1383         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1384                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1385
1386         index = tx_pool->free_map[tx_pool->consumer_index];
1387
1388         if (skb_is_gso(skb)) {
1389                 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1390                 dst = tx_pool->tso_ltb.buff + offset;
1391                 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1392                 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1393                 tx_pool->tso_index++;
1394                 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1395                         tx_pool->tso_index = 0;
1396         } else {
1397                 offset = index * (adapter->req_mtu + VLAN_HLEN);
1398                 dst = tx_pool->long_term_buff.buff + offset;
1399                 memset(dst, 0, adapter->req_mtu + VLAN_HLEN);
1400                 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1401         }
1402
1403         if (skb_shinfo(skb)->nr_frags) {
1404                 int cur, i;
1405
1406                 /* Copy the head */
1407                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1408                 cur = skb_headlen(skb);
1409
1410                 /* Copy the frags */
1411                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1412                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1413
1414                         memcpy(dst + cur,
1415                                page_address(skb_frag_page(frag)) +
1416                                frag->page_offset, skb_frag_size(frag));
1417                         cur += skb_frag_size(frag);
1418                 }
1419         } else {
1420                 skb_copy_from_linear_data(skb, dst, skb->len);
1421         }
1422
1423         tx_pool->consumer_index =
1424             (tx_pool->consumer_index + 1) %
1425                 adapter->req_tx_entries_per_subcrq;
1426
1427         tx_buff = &tx_pool->tx_buff[index];
1428         tx_buff->skb = skb;
1429         tx_buff->data_dma[0] = data_dma_addr;
1430         tx_buff->data_len[0] = skb->len;
1431         tx_buff->index = index;
1432         tx_buff->pool_index = queue_num;
1433         tx_buff->last_frag = true;
1434
1435         memset(&tx_crq, 0, sizeof(tx_crq));
1436         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1437         tx_crq.v1.type = IBMVNIC_TX_DESC;
1438         tx_crq.v1.n_crq_elem = 1;
1439         tx_crq.v1.n_sge = 1;
1440         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1441         tx_crq.v1.correlator = cpu_to_be32(index);
1442         if (skb_is_gso(skb))
1443                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1444         else
1445                 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1446         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1447         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1448
1449         if (adapter->vlan_header_insertion) {
1450                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1451                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1452         }
1453
1454         if (skb->protocol == htons(ETH_P_IP)) {
1455                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1456                 proto = ip_hdr(skb)->protocol;
1457         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1458                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1459                 proto = ipv6_hdr(skb)->nexthdr;
1460         }
1461
1462         if (proto == IPPROTO_TCP)
1463                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1464         else if (proto == IPPROTO_UDP)
1465                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1466
1467         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1468                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1469                 hdrs += 2;
1470         }
1471         if (skb_is_gso(skb)) {
1472                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1473                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1474                 hdrs += 2;
1475         }
1476         /* determine if l2/3/4 headers are sent to firmware */
1477         if ((*hdrs >> 7) & 1) {
1478                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1479                 tx_crq.v1.n_crq_elem = num_entries;
1480                 tx_buff->num_entries = num_entries;
1481                 tx_buff->indir_arr[0] = tx_crq;
1482                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1483                                                     sizeof(tx_buff->indir_arr),
1484                                                     DMA_TO_DEVICE);
1485                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1486                         dev_kfree_skb_any(skb);
1487                         tx_buff->skb = NULL;
1488                         if (!firmware_has_feature(FW_FEATURE_CMO))
1489                                 dev_err(dev, "tx: unable to map descriptor array\n");
1490                         tx_map_failed++;
1491                         tx_dropped++;
1492                         ret = NETDEV_TX_OK;
1493                         goto out;
1494                 }
1495                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1496                                                (u64)tx_buff->indir_dma,
1497                                                (u64)num_entries);
1498         } else {
1499                 tx_buff->num_entries = num_entries;
1500                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1501                                       &tx_crq);
1502         }
1503         if (lpar_rc != H_SUCCESS) {
1504                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1505
1506                 if (tx_pool->consumer_index == 0)
1507                         tx_pool->consumer_index =
1508                                 adapter->req_tx_entries_per_subcrq - 1;
1509                 else
1510                         tx_pool->consumer_index--;
1511
1512                 dev_kfree_skb_any(skb);
1513                 tx_buff->skb = NULL;
1514
1515                 if (lpar_rc == H_CLOSED) {
1516                         /* Disable TX and report carrier off if queue is closed.
1517                          * Firmware guarantees that a signal will be sent to the
1518                          * driver, triggering a reset or some other action.
1519                          */
1520                         netif_tx_stop_all_queues(netdev);
1521                         netif_carrier_off(netdev);
1522                 }
1523
1524                 tx_send_failed++;
1525                 tx_dropped++;
1526                 ret = NETDEV_TX_OK;
1527                 goto out;
1528         }
1529
1530         if (atomic_add_return(num_entries, &tx_scrq->used)
1531                                         >= adapter->req_tx_entries_per_subcrq) {
1532                 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1533                 netif_stop_subqueue(netdev, queue_num);
1534         }
1535
1536         tx_packets++;
1537         tx_bytes += skb->len;
1538         txq->trans_start = jiffies;
1539         ret = NETDEV_TX_OK;
1540
1541 out:
1542         netdev->stats.tx_dropped += tx_dropped;
1543         netdev->stats.tx_bytes += tx_bytes;
1544         netdev->stats.tx_packets += tx_packets;
1545         adapter->tx_send_failed += tx_send_failed;
1546         adapter->tx_map_failed += tx_map_failed;
1547         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1548         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1549         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1550
1551         return ret;
1552 }
1553
1554 static void ibmvnic_set_multi(struct net_device *netdev)
1555 {
1556         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1557         struct netdev_hw_addr *ha;
1558         union ibmvnic_crq crq;
1559
1560         memset(&crq, 0, sizeof(crq));
1561         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1562         crq.request_capability.cmd = REQUEST_CAPABILITY;
1563
1564         if (netdev->flags & IFF_PROMISC) {
1565                 if (!adapter->promisc_supported)
1566                         return;
1567         } else {
1568                 if (netdev->flags & IFF_ALLMULTI) {
1569                         /* Accept all multicast */
1570                         memset(&crq, 0, sizeof(crq));
1571                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1572                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1573                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1574                         ibmvnic_send_crq(adapter, &crq);
1575                 } else if (netdev_mc_empty(netdev)) {
1576                         /* Reject all multicast */
1577                         memset(&crq, 0, sizeof(crq));
1578                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1579                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1580                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1581                         ibmvnic_send_crq(adapter, &crq);
1582                 } else {
1583                         /* Accept one or more multicast(s) */
1584                         netdev_for_each_mc_addr(ha, netdev) {
1585                                 memset(&crq, 0, sizeof(crq));
1586                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1587                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1588                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1589                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1590                                                 ha->addr);
1591                                 ibmvnic_send_crq(adapter, &crq);
1592                         }
1593                 }
1594         }
1595 }
1596
1597 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1598 {
1599         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1600         struct sockaddr *addr = p;
1601         union ibmvnic_crq crq;
1602
1603         if (!is_valid_ether_addr(addr->sa_data))
1604                 return -EADDRNOTAVAIL;
1605
1606         memset(&crq, 0, sizeof(crq));
1607         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1608         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1609         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1610
1611         init_completion(&adapter->fw_done);
1612         ibmvnic_send_crq(adapter, &crq);
1613         wait_for_completion(&adapter->fw_done);
1614         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1615         return adapter->fw_done_rc ? -EIO : 0;
1616 }
1617
1618 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1619 {
1620         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1621         struct sockaddr *addr = p;
1622         int rc;
1623
1624         if (adapter->state == VNIC_PROBED) {
1625                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1626                 adapter->mac_change_pending = true;
1627                 return 0;
1628         }
1629
1630         rc = __ibmvnic_set_mac(netdev, addr);
1631
1632         return rc;
1633 }
1634
1635 /**
1636  * do_reset returns zero if we are able to keep processing reset events, or
1637  * non-zero if we hit a fatal error and must halt.
1638  */
1639 static int do_reset(struct ibmvnic_adapter *adapter,
1640                     struct ibmvnic_rwi *rwi, u32 reset_state)
1641 {
1642         u64 old_num_rx_queues, old_num_tx_queues;
1643         struct net_device *netdev = adapter->netdev;
1644         int i, rc;
1645
1646         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1647                    rwi->reset_reason);
1648
1649         netif_carrier_off(netdev);
1650         adapter->reset_reason = rwi->reset_reason;
1651
1652         old_num_rx_queues = adapter->req_rx_queues;
1653         old_num_tx_queues = adapter->req_tx_queues;
1654
1655         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1656                 rc = ibmvnic_reenable_crq_queue(adapter);
1657                 if (rc)
1658                         return 0;
1659                 ibmvnic_cleanup(netdev);
1660         } else if (rwi->reset_reason == VNIC_RESET_FAILOVER) {
1661                 ibmvnic_cleanup(netdev);
1662         } else {
1663                 rc = __ibmvnic_close(netdev);
1664                 if (rc)
1665                         return rc;
1666         }
1667
1668         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1669             adapter->wait_for_reset) {
1670                 release_resources(adapter);
1671                 release_sub_crqs(adapter, 1);
1672                 release_crq_queue(adapter);
1673         }
1674
1675         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1676                 /* remove the closed state so when we call open it appears
1677                  * we are coming from the probed state.
1678                  */
1679                 adapter->state = VNIC_PROBED;
1680
1681                 rc = ibmvnic_init(adapter);
1682                 if (rc)
1683                         return IBMVNIC_INIT_FAILED;
1684
1685                 /* If the adapter was in PROBE state prior to the reset,
1686                  * exit here.
1687                  */
1688                 if (reset_state == VNIC_PROBED)
1689                         return 0;
1690
1691                 rc = ibmvnic_login(netdev);
1692                 if (rc) {
1693                         adapter->state = VNIC_PROBED;
1694                         return 0;
1695                 }
1696
1697                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1698                     adapter->wait_for_reset) {
1699                         rc = init_resources(adapter);
1700                         if (rc)
1701                                 return rc;
1702                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1703                            adapter->req_tx_queues != old_num_tx_queues) {
1704                         adapter->map_id = 1;
1705                         release_rx_pools(adapter);
1706                         release_tx_pools(adapter);
1707                         init_rx_pools(netdev);
1708                         init_tx_pools(netdev);
1709
1710                         release_napi(adapter);
1711                         init_napi(adapter);
1712                 } else {
1713                         rc = reset_tx_pools(adapter);
1714                         if (rc)
1715                                 return rc;
1716
1717                         rc = reset_rx_pools(adapter);
1718                         if (rc)
1719                                 return rc;
1720
1721                         if (reset_state == VNIC_CLOSED)
1722                                 return 0;
1723                 }
1724         }
1725
1726         rc = __ibmvnic_open(netdev);
1727         if (rc) {
1728                 if (list_empty(&adapter->rwi_list))
1729                         adapter->state = VNIC_CLOSED;
1730                 else
1731                         adapter->state = reset_state;
1732
1733                 return 0;
1734         }
1735
1736         /* kick napi */
1737         for (i = 0; i < adapter->req_rx_queues; i++)
1738                 napi_schedule(&adapter->napi[i]);
1739
1740         if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1741                 netdev_notify_peers(netdev);
1742
1743         netif_carrier_on(netdev);
1744
1745         return 0;
1746 }
1747
1748 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1749 {
1750         struct ibmvnic_rwi *rwi;
1751
1752         mutex_lock(&adapter->rwi_lock);
1753
1754         if (!list_empty(&adapter->rwi_list)) {
1755                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1756                                        list);
1757                 list_del(&rwi->list);
1758         } else {
1759                 rwi = NULL;
1760         }
1761
1762         mutex_unlock(&adapter->rwi_lock);
1763         return rwi;
1764 }
1765
1766 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1767 {
1768         struct ibmvnic_rwi *rwi;
1769
1770         rwi = get_next_rwi(adapter);
1771         while (rwi) {
1772                 kfree(rwi);
1773                 rwi = get_next_rwi(adapter);
1774         }
1775 }
1776
1777 static void __ibmvnic_reset(struct work_struct *work)
1778 {
1779         struct ibmvnic_rwi *rwi;
1780         struct ibmvnic_adapter *adapter;
1781         struct net_device *netdev;
1782         u32 reset_state;
1783         int rc = 0;
1784
1785         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1786         netdev = adapter->netdev;
1787
1788         mutex_lock(&adapter->reset_lock);
1789         adapter->resetting = true;
1790         reset_state = adapter->state;
1791
1792         rwi = get_next_rwi(adapter);
1793         while (rwi) {
1794                 rc = do_reset(adapter, rwi, reset_state);
1795                 kfree(rwi);
1796                 if (rc && rc != IBMVNIC_INIT_FAILED)
1797                         break;
1798
1799                 rwi = get_next_rwi(adapter);
1800         }
1801
1802         if (adapter->wait_for_reset) {
1803                 adapter->wait_for_reset = false;
1804                 adapter->reset_done_rc = rc;
1805                 complete(&adapter->reset_done);
1806         }
1807
1808         if (rc) {
1809                 netdev_dbg(adapter->netdev, "Reset failed\n");
1810                 free_all_rwi(adapter);
1811                 mutex_unlock(&adapter->reset_lock);
1812                 return;
1813         }
1814
1815         adapter->resetting = false;
1816         mutex_unlock(&adapter->reset_lock);
1817 }
1818
1819 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1820                           enum ibmvnic_reset_reason reason)
1821 {
1822         struct ibmvnic_rwi *rwi, *tmp;
1823         struct net_device *netdev = adapter->netdev;
1824         struct list_head *entry;
1825
1826         if (adapter->state == VNIC_REMOVING ||
1827             adapter->state == VNIC_REMOVED) {
1828                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1829                 return;
1830         }
1831
1832         if (adapter->state == VNIC_PROBING) {
1833                 netdev_warn(netdev, "Adapter reset during probe\n");
1834                 adapter->init_done_rc = EAGAIN;
1835                 return;
1836         }
1837
1838         mutex_lock(&adapter->rwi_lock);
1839
1840         list_for_each(entry, &adapter->rwi_list) {
1841                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1842                 if (tmp->reset_reason == reason) {
1843                         netdev_dbg(netdev, "Skipping matching reset\n");
1844                         mutex_unlock(&adapter->rwi_lock);
1845                         return;
1846                 }
1847         }
1848
1849         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1850         if (!rwi) {
1851                 mutex_unlock(&adapter->rwi_lock);
1852                 ibmvnic_close(netdev);
1853                 return;
1854         }
1855
1856         rwi->reset_reason = reason;
1857         list_add_tail(&rwi->list, &adapter->rwi_list);
1858         mutex_unlock(&adapter->rwi_lock);
1859
1860         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1861         schedule_work(&adapter->ibmvnic_reset);
1862 }
1863
1864 static void ibmvnic_tx_timeout(struct net_device *dev)
1865 {
1866         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1867
1868         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1869 }
1870
1871 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1872                                   struct ibmvnic_rx_buff *rx_buff)
1873 {
1874         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1875
1876         rx_buff->skb = NULL;
1877
1878         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1879         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1880
1881         atomic_dec(&pool->available);
1882 }
1883
1884 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1885 {
1886         struct net_device *netdev = napi->dev;
1887         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1888         int scrq_num = (int)(napi - adapter->napi);
1889         int frames_processed = 0;
1890
1891 restart_poll:
1892         while (frames_processed < budget) {
1893                 struct sk_buff *skb;
1894                 struct ibmvnic_rx_buff *rx_buff;
1895                 union sub_crq *next;
1896                 u32 length;
1897                 u16 offset;
1898                 u8 flags = 0;
1899
1900                 if (unlikely(adapter->resetting &&
1901                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1902                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1903                         napi_complete_done(napi, frames_processed);
1904                         return frames_processed;
1905                 }
1906
1907                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1908                         break;
1909                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1910                 rx_buff =
1911                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1912                                                           rx_comp.correlator);
1913                 /* do error checking */
1914                 if (next->rx_comp.rc) {
1915                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1916                                    be16_to_cpu(next->rx_comp.rc));
1917                         /* free the entry */
1918                         next->rx_comp.first = 0;
1919                         dev_kfree_skb_any(rx_buff->skb);
1920                         remove_buff_from_pool(adapter, rx_buff);
1921                         continue;
1922                 } else if (!rx_buff->skb) {
1923                         /* free the entry */
1924                         next->rx_comp.first = 0;
1925                         remove_buff_from_pool(adapter, rx_buff);
1926                         continue;
1927                 }
1928
1929                 length = be32_to_cpu(next->rx_comp.len);
1930                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1931                 flags = next->rx_comp.flags;
1932                 skb = rx_buff->skb;
1933                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1934                                         length);
1935
1936                 /* VLAN Header has been stripped by the system firmware and
1937                  * needs to be inserted by the driver
1938                  */
1939                 if (adapter->rx_vlan_header_insertion &&
1940                     (flags & IBMVNIC_VLAN_STRIPPED))
1941                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1942                                                ntohs(next->rx_comp.vlan_tci));
1943
1944                 /* free the entry */
1945                 next->rx_comp.first = 0;
1946                 remove_buff_from_pool(adapter, rx_buff);
1947
1948                 skb_put(skb, length);
1949                 skb->protocol = eth_type_trans(skb, netdev);
1950                 skb_record_rx_queue(skb, scrq_num);
1951
1952                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1953                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1954                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1955                 }
1956
1957                 length = skb->len;
1958                 napi_gro_receive(napi, skb); /* send it up */
1959                 netdev->stats.rx_packets++;
1960                 netdev->stats.rx_bytes += length;
1961                 adapter->rx_stats_buffers[scrq_num].packets++;
1962                 adapter->rx_stats_buffers[scrq_num].bytes += length;
1963                 frames_processed++;
1964         }
1965
1966         if (adapter->state != VNIC_CLOSING)
1967                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1968
1969         if (frames_processed < budget) {
1970                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1971                 napi_complete_done(napi, frames_processed);
1972                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1973                     napi_reschedule(napi)) {
1974                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1975                         goto restart_poll;
1976                 }
1977         }
1978         return frames_processed;
1979 }
1980
1981 #ifdef CONFIG_NET_POLL_CONTROLLER
1982 static void ibmvnic_netpoll_controller(struct net_device *dev)
1983 {
1984         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1985         int i;
1986
1987         replenish_pools(netdev_priv(dev));
1988         for (i = 0; i < adapter->req_rx_queues; i++)
1989                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1990                                      adapter->rx_scrq[i]);
1991 }
1992 #endif
1993
1994 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1995 {
1996         adapter->fallback.mtu = adapter->req_mtu;
1997         adapter->fallback.rx_queues = adapter->req_rx_queues;
1998         adapter->fallback.tx_queues = adapter->req_tx_queues;
1999         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2000         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2001
2002         init_completion(&adapter->reset_done);
2003         ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2004         adapter->wait_for_reset = true;
2005         wait_for_completion(&adapter->reset_done);
2006
2007         if (adapter->reset_done_rc) {
2008                 adapter->desired.mtu = adapter->fallback.mtu;
2009                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2010                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2011                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2012                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2013
2014                 init_completion(&adapter->reset_done);
2015                 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2016                 wait_for_completion(&adapter->reset_done);
2017         }
2018         adapter->wait_for_reset = false;
2019
2020         return adapter->reset_done_rc;
2021 }
2022
2023 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2024 {
2025         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2026
2027         adapter->desired.mtu = new_mtu + ETH_HLEN;
2028
2029         return wait_for_reset(adapter);
2030 }
2031
2032 static const struct net_device_ops ibmvnic_netdev_ops = {
2033         .ndo_open               = ibmvnic_open,
2034         .ndo_stop               = ibmvnic_close,
2035         .ndo_start_xmit         = ibmvnic_xmit,
2036         .ndo_set_rx_mode        = ibmvnic_set_multi,
2037         .ndo_set_mac_address    = ibmvnic_set_mac,
2038         .ndo_validate_addr      = eth_validate_addr,
2039         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2040 #ifdef CONFIG_NET_POLL_CONTROLLER
2041         .ndo_poll_controller    = ibmvnic_netpoll_controller,
2042 #endif
2043         .ndo_change_mtu         = ibmvnic_change_mtu,
2044 };
2045
2046 /* ethtool functions */
2047
2048 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2049                                       struct ethtool_link_ksettings *cmd)
2050 {
2051         u32 supported, advertising;
2052
2053         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2054                           SUPPORTED_FIBRE);
2055         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2056                             ADVERTISED_FIBRE);
2057         cmd->base.speed = SPEED_1000;
2058         cmd->base.duplex = DUPLEX_FULL;
2059         cmd->base.port = PORT_FIBRE;
2060         cmd->base.phy_address = 0;
2061         cmd->base.autoneg = AUTONEG_ENABLE;
2062
2063         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2064                                                 supported);
2065         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2066                                                 advertising);
2067
2068         return 0;
2069 }
2070
2071 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2072                                 struct ethtool_drvinfo *info)
2073 {
2074         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2075
2076         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2077         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2078         strlcpy(info->fw_version, adapter->fw_version,
2079                 sizeof(info->fw_version));
2080 }
2081
2082 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2083 {
2084         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2085
2086         return adapter->msg_enable;
2087 }
2088
2089 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2090 {
2091         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2092
2093         adapter->msg_enable = data;
2094 }
2095
2096 static u32 ibmvnic_get_link(struct net_device *netdev)
2097 {
2098         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2099
2100         /* Don't need to send a query because we request a logical link up at
2101          * init and then we wait for link state indications
2102          */
2103         return adapter->logical_link_state;
2104 }
2105
2106 static void ibmvnic_get_ringparam(struct net_device *netdev,
2107                                   struct ethtool_ringparam *ring)
2108 {
2109         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2110
2111         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2112         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2113         ring->rx_mini_max_pending = 0;
2114         ring->rx_jumbo_max_pending = 0;
2115         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2116         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2117         ring->rx_mini_pending = 0;
2118         ring->rx_jumbo_pending = 0;
2119 }
2120
2121 static int ibmvnic_set_ringparam(struct net_device *netdev,
2122                                  struct ethtool_ringparam *ring)
2123 {
2124         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2125
2126         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2127             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2128                 netdev_err(netdev, "Invalid request.\n");
2129                 netdev_err(netdev, "Max tx buffers = %llu\n",
2130                            adapter->max_rx_add_entries_per_subcrq);
2131                 netdev_err(netdev, "Max rx buffers = %llu\n",
2132                            adapter->max_tx_entries_per_subcrq);
2133                 return -EINVAL;
2134         }
2135
2136         adapter->desired.rx_entries = ring->rx_pending;
2137         adapter->desired.tx_entries = ring->tx_pending;
2138
2139         return wait_for_reset(adapter);
2140 }
2141
2142 static void ibmvnic_get_channels(struct net_device *netdev,
2143                                  struct ethtool_channels *channels)
2144 {
2145         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2146
2147         channels->max_rx = adapter->max_rx_queues;
2148         channels->max_tx = adapter->max_tx_queues;
2149         channels->max_other = 0;
2150         channels->max_combined = 0;
2151         channels->rx_count = adapter->req_rx_queues;
2152         channels->tx_count = adapter->req_tx_queues;
2153         channels->other_count = 0;
2154         channels->combined_count = 0;
2155 }
2156
2157 static int ibmvnic_set_channels(struct net_device *netdev,
2158                                 struct ethtool_channels *channels)
2159 {
2160         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2161
2162         adapter->desired.rx_queues = channels->rx_count;
2163         adapter->desired.tx_queues = channels->tx_count;
2164
2165         return wait_for_reset(adapter);
2166 }
2167
2168 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2169 {
2170         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2171         int i;
2172
2173         if (stringset != ETH_SS_STATS)
2174                 return;
2175
2176         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2177                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2178
2179         for (i = 0; i < adapter->req_tx_queues; i++) {
2180                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2181                 data += ETH_GSTRING_LEN;
2182
2183                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2184                 data += ETH_GSTRING_LEN;
2185
2186                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2187                 data += ETH_GSTRING_LEN;
2188         }
2189
2190         for (i = 0; i < adapter->req_rx_queues; i++) {
2191                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2192                 data += ETH_GSTRING_LEN;
2193
2194                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2195                 data += ETH_GSTRING_LEN;
2196
2197                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2198                 data += ETH_GSTRING_LEN;
2199         }
2200 }
2201
2202 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2203 {
2204         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2205
2206         switch (sset) {
2207         case ETH_SS_STATS:
2208                 return ARRAY_SIZE(ibmvnic_stats) +
2209                        adapter->req_tx_queues * NUM_TX_STATS +
2210                        adapter->req_rx_queues * NUM_RX_STATS;
2211         default:
2212                 return -EOPNOTSUPP;
2213         }
2214 }
2215
2216 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2217                                       struct ethtool_stats *stats, u64 *data)
2218 {
2219         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2220         union ibmvnic_crq crq;
2221         int i, j;
2222
2223         memset(&crq, 0, sizeof(crq));
2224         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2225         crq.request_statistics.cmd = REQUEST_STATISTICS;
2226         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2227         crq.request_statistics.len =
2228             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2229
2230         /* Wait for data to be written */
2231         init_completion(&adapter->stats_done);
2232         ibmvnic_send_crq(adapter, &crq);
2233         wait_for_completion(&adapter->stats_done);
2234
2235         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2236                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2237                                                 ibmvnic_stats[i].offset));
2238
2239         for (j = 0; j < adapter->req_tx_queues; j++) {
2240                 data[i] = adapter->tx_stats_buffers[j].packets;
2241                 i++;
2242                 data[i] = adapter->tx_stats_buffers[j].bytes;
2243                 i++;
2244                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2245                 i++;
2246         }
2247
2248         for (j = 0; j < adapter->req_rx_queues; j++) {
2249                 data[i] = adapter->rx_stats_buffers[j].packets;
2250                 i++;
2251                 data[i] = adapter->rx_stats_buffers[j].bytes;
2252                 i++;
2253                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2254                 i++;
2255         }
2256 }
2257
2258 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2259         .get_drvinfo            = ibmvnic_get_drvinfo,
2260         .get_msglevel           = ibmvnic_get_msglevel,
2261         .set_msglevel           = ibmvnic_set_msglevel,
2262         .get_link               = ibmvnic_get_link,
2263         .get_ringparam          = ibmvnic_get_ringparam,
2264         .set_ringparam          = ibmvnic_set_ringparam,
2265         .get_channels           = ibmvnic_get_channels,
2266         .set_channels           = ibmvnic_set_channels,
2267         .get_strings            = ibmvnic_get_strings,
2268         .get_sset_count         = ibmvnic_get_sset_count,
2269         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2270         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2271 };
2272
2273 /* Routines for managing CRQs/sCRQs  */
2274
2275 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2276                                    struct ibmvnic_sub_crq_queue *scrq)
2277 {
2278         int rc;
2279
2280         if (scrq->irq) {
2281                 free_irq(scrq->irq, scrq);
2282                 irq_dispose_mapping(scrq->irq);
2283                 scrq->irq = 0;
2284         }
2285
2286         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2287         scrq->cur = 0;
2288
2289         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2290                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2291         return rc;
2292 }
2293
2294 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2295 {
2296         int i, rc;
2297
2298         for (i = 0; i < adapter->req_tx_queues; i++) {
2299                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2300                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2301                 if (rc)
2302                         return rc;
2303         }
2304
2305         for (i = 0; i < adapter->req_rx_queues; i++) {
2306                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2307                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2308                 if (rc)
2309                         return rc;
2310         }
2311
2312         return rc;
2313 }
2314
2315 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2316                                   struct ibmvnic_sub_crq_queue *scrq,
2317                                   bool do_h_free)
2318 {
2319         struct device *dev = &adapter->vdev->dev;
2320         long rc;
2321
2322         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2323
2324         if (do_h_free) {
2325                 /* Close the sub-crqs */
2326                 do {
2327                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2328                                                 adapter->vdev->unit_address,
2329                                                 scrq->crq_num);
2330                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2331
2332                 if (rc) {
2333                         netdev_err(adapter->netdev,
2334                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2335                                    scrq->crq_num, rc);
2336                 }
2337         }
2338
2339         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2340                          DMA_BIDIRECTIONAL);
2341         free_pages((unsigned long)scrq->msgs, 2);
2342         kfree(scrq);
2343 }
2344
2345 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2346                                                         *adapter)
2347 {
2348         struct device *dev = &adapter->vdev->dev;
2349         struct ibmvnic_sub_crq_queue *scrq;
2350         int rc;
2351
2352         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2353         if (!scrq)
2354                 return NULL;
2355
2356         scrq->msgs =
2357                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2358         if (!scrq->msgs) {
2359                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2360                 goto zero_page_failed;
2361         }
2362
2363         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2364                                          DMA_BIDIRECTIONAL);
2365         if (dma_mapping_error(dev, scrq->msg_token)) {
2366                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2367                 goto map_failed;
2368         }
2369
2370         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2371                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2372
2373         if (rc == H_RESOURCE)
2374                 rc = ibmvnic_reset_crq(adapter);
2375
2376         if (rc == H_CLOSED) {
2377                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2378         } else if (rc) {
2379                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2380                 goto reg_failed;
2381         }
2382
2383         scrq->adapter = adapter;
2384         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2385         spin_lock_init(&scrq->lock);
2386
2387         netdev_dbg(adapter->netdev,
2388                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2389                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2390
2391         return scrq;
2392
2393 reg_failed:
2394         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2395                          DMA_BIDIRECTIONAL);
2396 map_failed:
2397         free_pages((unsigned long)scrq->msgs, 2);
2398 zero_page_failed:
2399         kfree(scrq);
2400
2401         return NULL;
2402 }
2403
2404 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2405 {
2406         int i;
2407
2408         if (adapter->tx_scrq) {
2409                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2410                         if (!adapter->tx_scrq[i])
2411                                 continue;
2412
2413                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2414                                    i);
2415                         if (adapter->tx_scrq[i]->irq) {
2416                                 free_irq(adapter->tx_scrq[i]->irq,
2417                                          adapter->tx_scrq[i]);
2418                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2419                                 adapter->tx_scrq[i]->irq = 0;
2420                         }
2421
2422                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2423                                               do_h_free);
2424                 }
2425
2426                 kfree(adapter->tx_scrq);
2427                 adapter->tx_scrq = NULL;
2428                 adapter->num_active_tx_scrqs = 0;
2429         }
2430
2431         if (adapter->rx_scrq) {
2432                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2433                         if (!adapter->rx_scrq[i])
2434                                 continue;
2435
2436                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2437                                    i);
2438                         if (adapter->rx_scrq[i]->irq) {
2439                                 free_irq(adapter->rx_scrq[i]->irq,
2440                                          adapter->rx_scrq[i]);
2441                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2442                                 adapter->rx_scrq[i]->irq = 0;
2443                         }
2444
2445                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2446                                               do_h_free);
2447                 }
2448
2449                 kfree(adapter->rx_scrq);
2450                 adapter->rx_scrq = NULL;
2451                 adapter->num_active_rx_scrqs = 0;
2452         }
2453 }
2454
2455 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2456                             struct ibmvnic_sub_crq_queue *scrq)
2457 {
2458         struct device *dev = &adapter->vdev->dev;
2459         unsigned long rc;
2460
2461         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2462                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2463         if (rc)
2464                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2465                         scrq->hw_irq, rc);
2466         return rc;
2467 }
2468
2469 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2470                            struct ibmvnic_sub_crq_queue *scrq)
2471 {
2472         struct device *dev = &adapter->vdev->dev;
2473         unsigned long rc;
2474
2475         if (scrq->hw_irq > 0x100000000ULL) {
2476                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2477                 return 1;
2478         }
2479
2480         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2481                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2482         if (rc)
2483                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2484                         scrq->hw_irq, rc);
2485         return rc;
2486 }
2487
2488 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2489                                struct ibmvnic_sub_crq_queue *scrq)
2490 {
2491         struct device *dev = &adapter->vdev->dev;
2492         struct ibmvnic_tx_buff *txbuff;
2493         union sub_crq *next;
2494         int index;
2495         int i, j;
2496         u8 first;
2497
2498 restart_loop:
2499         while (pending_scrq(adapter, scrq)) {
2500                 unsigned int pool = scrq->pool_index;
2501                 int num_entries = 0;
2502
2503                 next = ibmvnic_next_scrq(adapter, scrq);
2504                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2505                         if (next->tx_comp.rcs[i]) {
2506                                 dev_err(dev, "tx error %x\n",
2507                                         next->tx_comp.rcs[i]);
2508                                 continue;
2509                         }
2510                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2511                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
2512
2513                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2514                                 if (!txbuff->data_dma[j])
2515                                         continue;
2516
2517                                 txbuff->data_dma[j] = 0;
2518                         }
2519                         /* if sub_crq was sent indirectly */
2520                         first = txbuff->indir_arr[0].generic.first;
2521                         if (first == IBMVNIC_CRQ_CMD) {
2522                                 dma_unmap_single(dev, txbuff->indir_dma,
2523                                                  sizeof(txbuff->indir_arr),
2524                                                  DMA_TO_DEVICE);
2525                         }
2526
2527                         if (txbuff->last_frag) {
2528                                 dev_kfree_skb_any(txbuff->skb);
2529                                 txbuff->skb = NULL;
2530                         }
2531
2532                         num_entries += txbuff->num_entries;
2533
2534                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2535                                                      producer_index] = index;
2536                         adapter->tx_pool[pool].producer_index =
2537                             (adapter->tx_pool[pool].producer_index + 1) %
2538                             adapter->req_tx_entries_per_subcrq;
2539                 }
2540                 /* remove tx_comp scrq*/
2541                 next->tx_comp.first = 0;
2542
2543                 if (atomic_sub_return(num_entries, &scrq->used) <=
2544                     (adapter->req_tx_entries_per_subcrq / 2) &&
2545                     __netif_subqueue_stopped(adapter->netdev,
2546                                              scrq->pool_index)) {
2547                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2548                         netdev_dbg(adapter->netdev, "Started queue %d\n",
2549                                    scrq->pool_index);
2550                 }
2551         }
2552
2553         enable_scrq_irq(adapter, scrq);
2554
2555         if (pending_scrq(adapter, scrq)) {
2556                 disable_scrq_irq(adapter, scrq);
2557                 goto restart_loop;
2558         }
2559
2560         return 0;
2561 }
2562
2563 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2564 {
2565         struct ibmvnic_sub_crq_queue *scrq = instance;
2566         struct ibmvnic_adapter *adapter = scrq->adapter;
2567
2568         disable_scrq_irq(adapter, scrq);
2569         ibmvnic_complete_tx(adapter, scrq);
2570
2571         return IRQ_HANDLED;
2572 }
2573
2574 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2575 {
2576         struct ibmvnic_sub_crq_queue *scrq = instance;
2577         struct ibmvnic_adapter *adapter = scrq->adapter;
2578
2579         /* When booting a kdump kernel we can hit pending interrupts
2580          * prior to completing driver initialization.
2581          */
2582         if (unlikely(adapter->state != VNIC_OPEN))
2583                 return IRQ_NONE;
2584
2585         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2586
2587         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2588                 disable_scrq_irq(adapter, scrq);
2589                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2590         }
2591
2592         return IRQ_HANDLED;
2593 }
2594
2595 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2596 {
2597         struct device *dev = &adapter->vdev->dev;
2598         struct ibmvnic_sub_crq_queue *scrq;
2599         int i = 0, j = 0;
2600         int rc = 0;
2601
2602         for (i = 0; i < adapter->req_tx_queues; i++) {
2603                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2604                            i);
2605                 scrq = adapter->tx_scrq[i];
2606                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2607
2608                 if (!scrq->irq) {
2609                         rc = -EINVAL;
2610                         dev_err(dev, "Error mapping irq\n");
2611                         goto req_tx_irq_failed;
2612                 }
2613
2614                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2615                                  0, "ibmvnic_tx", scrq);
2616
2617                 if (rc) {
2618                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2619                                 scrq->irq, rc);
2620                         irq_dispose_mapping(scrq->irq);
2621                         goto req_tx_irq_failed;
2622                 }
2623         }
2624
2625         for (i = 0; i < adapter->req_rx_queues; i++) {
2626                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2627                            i);
2628                 scrq = adapter->rx_scrq[i];
2629                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2630                 if (!scrq->irq) {
2631                         rc = -EINVAL;
2632                         dev_err(dev, "Error mapping irq\n");
2633                         goto req_rx_irq_failed;
2634                 }
2635                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2636                                  0, "ibmvnic_rx", scrq);
2637                 if (rc) {
2638                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2639                                 scrq->irq, rc);
2640                         irq_dispose_mapping(scrq->irq);
2641                         goto req_rx_irq_failed;
2642                 }
2643         }
2644         return rc;
2645
2646 req_rx_irq_failed:
2647         for (j = 0; j < i; j++) {
2648                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2649                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2650         }
2651         i = adapter->req_tx_queues;
2652 req_tx_irq_failed:
2653         for (j = 0; j < i; j++) {
2654                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2655                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2656         }
2657         release_sub_crqs(adapter, 1);
2658         return rc;
2659 }
2660
2661 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2662 {
2663         struct device *dev = &adapter->vdev->dev;
2664         struct ibmvnic_sub_crq_queue **allqueues;
2665         int registered_queues = 0;
2666         int total_queues;
2667         int more = 0;
2668         int i;
2669
2670         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2671
2672         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2673         if (!allqueues)
2674                 return -1;
2675
2676         for (i = 0; i < total_queues; i++) {
2677                 allqueues[i] = init_sub_crq_queue(adapter);
2678                 if (!allqueues[i]) {
2679                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2680                         break;
2681                 }
2682                 registered_queues++;
2683         }
2684
2685         /* Make sure we were able to register the minimum number of queues */
2686         if (registered_queues <
2687             adapter->min_tx_queues + adapter->min_rx_queues) {
2688                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2689                 goto tx_failed;
2690         }
2691
2692         /* Distribute the failed allocated queues*/
2693         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2694                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2695                 switch (i % 3) {
2696                 case 0:
2697                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2698                                 adapter->req_rx_queues--;
2699                         else
2700                                 more++;
2701                         break;
2702                 case 1:
2703                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2704                                 adapter->req_tx_queues--;
2705                         else
2706                                 more++;
2707                         break;
2708                 }
2709         }
2710
2711         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2712                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2713         if (!adapter->tx_scrq)
2714                 goto tx_failed;
2715
2716         for (i = 0; i < adapter->req_tx_queues; i++) {
2717                 adapter->tx_scrq[i] = allqueues[i];
2718                 adapter->tx_scrq[i]->pool_index = i;
2719                 adapter->num_active_tx_scrqs++;
2720         }
2721
2722         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2723                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2724         if (!adapter->rx_scrq)
2725                 goto rx_failed;
2726
2727         for (i = 0; i < adapter->req_rx_queues; i++) {
2728                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2729                 adapter->rx_scrq[i]->scrq_num = i;
2730                 adapter->num_active_rx_scrqs++;
2731         }
2732
2733         kfree(allqueues);
2734         return 0;
2735
2736 rx_failed:
2737         kfree(adapter->tx_scrq);
2738         adapter->tx_scrq = NULL;
2739 tx_failed:
2740         for (i = 0; i < registered_queues; i++)
2741                 release_sub_crq_queue(adapter, allqueues[i], 1);
2742         kfree(allqueues);
2743         return -1;
2744 }
2745
2746 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2747 {
2748         struct device *dev = &adapter->vdev->dev;
2749         union ibmvnic_crq crq;
2750         int max_entries;
2751
2752         if (!retry) {
2753                 /* Sub-CRQ entries are 32 byte long */
2754                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2755
2756                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2757                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2758                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2759                         return;
2760                 }
2761
2762                 if (adapter->desired.mtu)
2763                         adapter->req_mtu = adapter->desired.mtu;
2764                 else
2765                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2766
2767                 if (!adapter->desired.tx_entries)
2768                         adapter->desired.tx_entries =
2769                                         adapter->max_tx_entries_per_subcrq;
2770                 if (!adapter->desired.rx_entries)
2771                         adapter->desired.rx_entries =
2772                                         adapter->max_rx_add_entries_per_subcrq;
2773
2774                 max_entries = IBMVNIC_MAX_LTB_SIZE /
2775                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2776
2777                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2778                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2779                         adapter->desired.tx_entries = max_entries;
2780                 }
2781
2782                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2783                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2784                         adapter->desired.rx_entries = max_entries;
2785                 }
2786
2787                 if (adapter->desired.tx_entries)
2788                         adapter->req_tx_entries_per_subcrq =
2789                                         adapter->desired.tx_entries;
2790                 else
2791                         adapter->req_tx_entries_per_subcrq =
2792                                         adapter->max_tx_entries_per_subcrq;
2793
2794                 if (adapter->desired.rx_entries)
2795                         adapter->req_rx_add_entries_per_subcrq =
2796                                         adapter->desired.rx_entries;
2797                 else
2798                         adapter->req_rx_add_entries_per_subcrq =
2799                                         adapter->max_rx_add_entries_per_subcrq;
2800
2801                 if (adapter->desired.tx_queues)
2802                         adapter->req_tx_queues =
2803                                         adapter->desired.tx_queues;
2804                 else
2805                         adapter->req_tx_queues =
2806                                         adapter->opt_tx_comp_sub_queues;
2807
2808                 if (adapter->desired.rx_queues)
2809                         adapter->req_rx_queues =
2810                                         adapter->desired.rx_queues;
2811                 else
2812                         adapter->req_rx_queues =
2813                                         adapter->opt_rx_comp_queues;
2814
2815                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2816         }
2817
2818         memset(&crq, 0, sizeof(crq));
2819         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2820         crq.request_capability.cmd = REQUEST_CAPABILITY;
2821
2822         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2823         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2824         atomic_inc(&adapter->running_cap_crqs);
2825         ibmvnic_send_crq(adapter, &crq);
2826
2827         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2828         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2829         atomic_inc(&adapter->running_cap_crqs);
2830         ibmvnic_send_crq(adapter, &crq);
2831
2832         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2833         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2834         atomic_inc(&adapter->running_cap_crqs);
2835         ibmvnic_send_crq(adapter, &crq);
2836
2837         crq.request_capability.capability =
2838             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2839         crq.request_capability.number =
2840             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2841         atomic_inc(&adapter->running_cap_crqs);
2842         ibmvnic_send_crq(adapter, &crq);
2843
2844         crq.request_capability.capability =
2845             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2846         crq.request_capability.number =
2847             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2848         atomic_inc(&adapter->running_cap_crqs);
2849         ibmvnic_send_crq(adapter, &crq);
2850
2851         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2852         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2853         atomic_inc(&adapter->running_cap_crqs);
2854         ibmvnic_send_crq(adapter, &crq);
2855
2856         if (adapter->netdev->flags & IFF_PROMISC) {
2857                 if (adapter->promisc_supported) {
2858                         crq.request_capability.capability =
2859                             cpu_to_be16(PROMISC_REQUESTED);
2860                         crq.request_capability.number = cpu_to_be64(1);
2861                         atomic_inc(&adapter->running_cap_crqs);
2862                         ibmvnic_send_crq(adapter, &crq);
2863                 }
2864         } else {
2865                 crq.request_capability.capability =
2866                     cpu_to_be16(PROMISC_REQUESTED);
2867                 crq.request_capability.number = cpu_to_be64(0);
2868                 atomic_inc(&adapter->running_cap_crqs);
2869                 ibmvnic_send_crq(adapter, &crq);
2870         }
2871 }
2872
2873 static int pending_scrq(struct ibmvnic_adapter *adapter,
2874                         struct ibmvnic_sub_crq_queue *scrq)
2875 {
2876         union sub_crq *entry = &scrq->msgs[scrq->cur];
2877
2878         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2879                 return 1;
2880         else
2881                 return 0;
2882 }
2883
2884 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2885                                         struct ibmvnic_sub_crq_queue *scrq)
2886 {
2887         union sub_crq *entry;
2888         unsigned long flags;
2889
2890         spin_lock_irqsave(&scrq->lock, flags);
2891         entry = &scrq->msgs[scrq->cur];
2892         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2893                 if (++scrq->cur == scrq->size)
2894                         scrq->cur = 0;
2895         } else {
2896                 entry = NULL;
2897         }
2898         spin_unlock_irqrestore(&scrq->lock, flags);
2899
2900         return entry;
2901 }
2902
2903 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2904 {
2905         struct ibmvnic_crq_queue *queue = &adapter->crq;
2906         union ibmvnic_crq *crq;
2907
2908         crq = &queue->msgs[queue->cur];
2909         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2910                 if (++queue->cur == queue->size)
2911                         queue->cur = 0;
2912         } else {
2913                 crq = NULL;
2914         }
2915
2916         return crq;
2917 }
2918
2919 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2920                        union sub_crq *sub_crq)
2921 {
2922         unsigned int ua = adapter->vdev->unit_address;
2923         struct device *dev = &adapter->vdev->dev;
2924         u64 *u64_crq = (u64 *)sub_crq;
2925         int rc;
2926
2927         netdev_dbg(adapter->netdev,
2928                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2929                    (unsigned long int)cpu_to_be64(remote_handle),
2930                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2931                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2932                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2933                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2934
2935         /* Make sure the hypervisor sees the complete request */
2936         mb();
2937
2938         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2939                                 cpu_to_be64(remote_handle),
2940                                 cpu_to_be64(u64_crq[0]),
2941                                 cpu_to_be64(u64_crq[1]),
2942                                 cpu_to_be64(u64_crq[2]),
2943                                 cpu_to_be64(u64_crq[3]));
2944
2945         if (rc) {
2946                 if (rc == H_CLOSED)
2947                         dev_warn(dev, "CRQ Queue closed\n");
2948                 dev_err(dev, "Send error (rc=%d)\n", rc);
2949         }
2950
2951         return rc;
2952 }
2953
2954 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2955                                 u64 remote_handle, u64 ioba, u64 num_entries)
2956 {
2957         unsigned int ua = adapter->vdev->unit_address;
2958         struct device *dev = &adapter->vdev->dev;
2959         int rc;
2960
2961         /* Make sure the hypervisor sees the complete request */
2962         mb();
2963         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2964                                 cpu_to_be64(remote_handle),
2965                                 ioba, num_entries);
2966
2967         if (rc) {
2968                 if (rc == H_CLOSED)
2969                         dev_warn(dev, "CRQ Queue closed\n");
2970                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2971         }
2972
2973         return rc;
2974 }
2975
2976 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2977                             union ibmvnic_crq *crq)
2978 {
2979         unsigned int ua = adapter->vdev->unit_address;
2980         struct device *dev = &adapter->vdev->dev;
2981         u64 *u64_crq = (u64 *)crq;
2982         int rc;
2983
2984         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2985                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2986                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2987
2988         /* Make sure the hypervisor sees the complete request */
2989         mb();
2990
2991         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2992                                 cpu_to_be64(u64_crq[0]),
2993                                 cpu_to_be64(u64_crq[1]));
2994
2995         if (rc) {
2996                 if (rc == H_CLOSED) {
2997                         dev_warn(dev, "CRQ Queue closed\n");
2998                         if (adapter->resetting)
2999                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3000                 }
3001
3002                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3003         }
3004
3005         return rc;
3006 }
3007
3008 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3009 {
3010         union ibmvnic_crq crq;
3011
3012         memset(&crq, 0, sizeof(crq));
3013         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3014         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3015         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3016
3017         return ibmvnic_send_crq(adapter, &crq);
3018 }
3019
3020 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3021 {
3022         union ibmvnic_crq crq;
3023
3024         memset(&crq, 0, sizeof(crq));
3025         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3026         crq.version_exchange.cmd = VERSION_EXCHANGE;
3027         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3028
3029         return ibmvnic_send_crq(adapter, &crq);
3030 }
3031
3032 struct vnic_login_client_data {
3033         u8      type;
3034         __be16  len;
3035         char    name;
3036 } __packed;
3037
3038 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3039 {
3040         int len;
3041
3042         /* Calculate the amount of buffer space needed for the
3043          * vnic client data in the login buffer. There are four entries,
3044          * OS name, LPAR name, device name, and a null last entry.
3045          */
3046         len = 4 * sizeof(struct vnic_login_client_data);
3047         len += 6; /* "Linux" plus NULL */
3048         len += strlen(utsname()->nodename) + 1;
3049         len += strlen(adapter->netdev->name) + 1;
3050
3051         return len;
3052 }
3053
3054 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3055                                  struct vnic_login_client_data *vlcd)
3056 {
3057         const char *os_name = "Linux";
3058         int len;
3059
3060         /* Type 1 - LPAR OS */
3061         vlcd->type = 1;
3062         len = strlen(os_name) + 1;
3063         vlcd->len = cpu_to_be16(len);
3064         strncpy(&vlcd->name, os_name, len);
3065         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3066
3067         /* Type 2 - LPAR name */
3068         vlcd->type = 2;
3069         len = strlen(utsname()->nodename) + 1;
3070         vlcd->len = cpu_to_be16(len);
3071         strncpy(&vlcd->name, utsname()->nodename, len);
3072         vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
3073
3074         /* Type 3 - device name */
3075         vlcd->type = 3;
3076         len = strlen(adapter->netdev->name) + 1;
3077         vlcd->len = cpu_to_be16(len);
3078         strncpy(&vlcd->name, adapter->netdev->name, len);
3079 }
3080
3081 static int send_login(struct ibmvnic_adapter *adapter)
3082 {
3083         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3084         struct ibmvnic_login_buffer *login_buffer;
3085         struct device *dev = &adapter->vdev->dev;
3086         dma_addr_t rsp_buffer_token;
3087         dma_addr_t buffer_token;
3088         size_t rsp_buffer_size;
3089         union ibmvnic_crq crq;
3090         size_t buffer_size;
3091         __be64 *tx_list_p;
3092         __be64 *rx_list_p;
3093         int client_data_len;
3094         struct vnic_login_client_data *vlcd;
3095         int i;
3096
3097         if (!adapter->tx_scrq || !adapter->rx_scrq) {
3098                 netdev_err(adapter->netdev,
3099                            "RX or TX queues are not allocated, device login failed\n");
3100                 return -1;
3101         }
3102
3103         release_login_rsp_buffer(adapter);
3104         client_data_len = vnic_client_data_len(adapter);
3105
3106         buffer_size =
3107             sizeof(struct ibmvnic_login_buffer) +
3108             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3109             client_data_len;
3110
3111         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3112         if (!login_buffer)
3113                 goto buf_alloc_failed;
3114
3115         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3116                                       DMA_TO_DEVICE);
3117         if (dma_mapping_error(dev, buffer_token)) {
3118                 dev_err(dev, "Couldn't map login buffer\n");
3119                 goto buf_map_failed;
3120         }
3121
3122         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3123                           sizeof(u64) * adapter->req_tx_queues +
3124                           sizeof(u64) * adapter->req_rx_queues +
3125                           sizeof(u64) * adapter->req_rx_queues +
3126                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3127
3128         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3129         if (!login_rsp_buffer)
3130                 goto buf_rsp_alloc_failed;
3131
3132         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3133                                           rsp_buffer_size, DMA_FROM_DEVICE);
3134         if (dma_mapping_error(dev, rsp_buffer_token)) {
3135                 dev_err(dev, "Couldn't map login rsp buffer\n");
3136                 goto buf_rsp_map_failed;
3137         }
3138
3139         adapter->login_buf = login_buffer;
3140         adapter->login_buf_token = buffer_token;
3141         adapter->login_buf_sz = buffer_size;
3142         adapter->login_rsp_buf = login_rsp_buffer;
3143         adapter->login_rsp_buf_token = rsp_buffer_token;
3144         adapter->login_rsp_buf_sz = rsp_buffer_size;
3145
3146         login_buffer->len = cpu_to_be32(buffer_size);
3147         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3148         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3149         login_buffer->off_txcomp_subcrqs =
3150             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3151         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3152         login_buffer->off_rxcomp_subcrqs =
3153             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3154                         sizeof(u64) * adapter->req_tx_queues);
3155         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3156         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3157
3158         tx_list_p = (__be64 *)((char *)login_buffer +
3159                                       sizeof(struct ibmvnic_login_buffer));
3160         rx_list_p = (__be64 *)((char *)login_buffer +
3161                                       sizeof(struct ibmvnic_login_buffer) +
3162                                       sizeof(u64) * adapter->req_tx_queues);
3163
3164         for (i = 0; i < adapter->req_tx_queues; i++) {
3165                 if (adapter->tx_scrq[i]) {
3166                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3167                                                    crq_num);
3168                 }
3169         }
3170
3171         for (i = 0; i < adapter->req_rx_queues; i++) {
3172                 if (adapter->rx_scrq[i]) {
3173                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3174                                                    crq_num);
3175                 }
3176         }
3177
3178         /* Insert vNIC login client data */
3179         vlcd = (struct vnic_login_client_data *)
3180                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3181         login_buffer->client_data_offset =
3182                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3183         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3184
3185         vnic_add_client_data(adapter, vlcd);
3186
3187         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3188         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3189                 netdev_dbg(adapter->netdev, "%016lx\n",
3190                            ((unsigned long int *)(adapter->login_buf))[i]);
3191         }
3192
3193         memset(&crq, 0, sizeof(crq));
3194         crq.login.first = IBMVNIC_CRQ_CMD;
3195         crq.login.cmd = LOGIN;
3196         crq.login.ioba = cpu_to_be32(buffer_token);
3197         crq.login.len = cpu_to_be32(buffer_size);
3198         ibmvnic_send_crq(adapter, &crq);
3199
3200         return 0;
3201
3202 buf_rsp_map_failed:
3203         kfree(login_rsp_buffer);
3204 buf_rsp_alloc_failed:
3205         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3206 buf_map_failed:
3207         kfree(login_buffer);
3208 buf_alloc_failed:
3209         return -1;
3210 }
3211
3212 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3213                              u32 len, u8 map_id)
3214 {
3215         union ibmvnic_crq crq;
3216
3217         memset(&crq, 0, sizeof(crq));
3218         crq.request_map.first = IBMVNIC_CRQ_CMD;
3219         crq.request_map.cmd = REQUEST_MAP;
3220         crq.request_map.map_id = map_id;
3221         crq.request_map.ioba = cpu_to_be32(addr);
3222         crq.request_map.len = cpu_to_be32(len);
3223         ibmvnic_send_crq(adapter, &crq);
3224 }
3225
3226 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3227 {
3228         union ibmvnic_crq crq;
3229
3230         memset(&crq, 0, sizeof(crq));
3231         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3232         crq.request_unmap.cmd = REQUEST_UNMAP;
3233         crq.request_unmap.map_id = map_id;
3234         ibmvnic_send_crq(adapter, &crq);
3235 }
3236
3237 static void send_map_query(struct ibmvnic_adapter *adapter)
3238 {
3239         union ibmvnic_crq crq;
3240
3241         memset(&crq, 0, sizeof(crq));
3242         crq.query_map.first = IBMVNIC_CRQ_CMD;
3243         crq.query_map.cmd = QUERY_MAP;
3244         ibmvnic_send_crq(adapter, &crq);
3245 }
3246
3247 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3248 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3249 {
3250         union ibmvnic_crq crq;
3251
3252         atomic_set(&adapter->running_cap_crqs, 0);
3253         memset(&crq, 0, sizeof(crq));
3254         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3255         crq.query_capability.cmd = QUERY_CAPABILITY;
3256
3257         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3258         atomic_inc(&adapter->running_cap_crqs);
3259         ibmvnic_send_crq(adapter, &crq);
3260
3261         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3262         atomic_inc(&adapter->running_cap_crqs);
3263         ibmvnic_send_crq(adapter, &crq);
3264
3265         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3266         atomic_inc(&adapter->running_cap_crqs);
3267         ibmvnic_send_crq(adapter, &crq);
3268
3269         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3270         atomic_inc(&adapter->running_cap_crqs);
3271         ibmvnic_send_crq(adapter, &crq);
3272
3273         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3274         atomic_inc(&adapter->running_cap_crqs);
3275         ibmvnic_send_crq(adapter, &crq);
3276
3277         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3278         atomic_inc(&adapter->running_cap_crqs);
3279         ibmvnic_send_crq(adapter, &crq);
3280
3281         crq.query_capability.capability =
3282             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3283         atomic_inc(&adapter->running_cap_crqs);
3284         ibmvnic_send_crq(adapter, &crq);
3285
3286         crq.query_capability.capability =
3287             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3288         atomic_inc(&adapter->running_cap_crqs);
3289         ibmvnic_send_crq(adapter, &crq);
3290
3291         crq.query_capability.capability =
3292             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3293         atomic_inc(&adapter->running_cap_crqs);
3294         ibmvnic_send_crq(adapter, &crq);
3295
3296         crq.query_capability.capability =
3297             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3298         atomic_inc(&adapter->running_cap_crqs);
3299         ibmvnic_send_crq(adapter, &crq);
3300
3301         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3302         atomic_inc(&adapter->running_cap_crqs);
3303         ibmvnic_send_crq(adapter, &crq);
3304
3305         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3306         atomic_inc(&adapter->running_cap_crqs);
3307         ibmvnic_send_crq(adapter, &crq);
3308
3309         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3310         atomic_inc(&adapter->running_cap_crqs);
3311         ibmvnic_send_crq(adapter, &crq);
3312
3313         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3314         atomic_inc(&adapter->running_cap_crqs);
3315         ibmvnic_send_crq(adapter, &crq);
3316
3317         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3318         atomic_inc(&adapter->running_cap_crqs);
3319         ibmvnic_send_crq(adapter, &crq);
3320
3321         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3322         atomic_inc(&adapter->running_cap_crqs);
3323         ibmvnic_send_crq(adapter, &crq);
3324
3325         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3326         atomic_inc(&adapter->running_cap_crqs);
3327         ibmvnic_send_crq(adapter, &crq);
3328
3329         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3330         atomic_inc(&adapter->running_cap_crqs);
3331         ibmvnic_send_crq(adapter, &crq);
3332
3333         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3334         atomic_inc(&adapter->running_cap_crqs);
3335         ibmvnic_send_crq(adapter, &crq);
3336
3337         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3338         atomic_inc(&adapter->running_cap_crqs);
3339         ibmvnic_send_crq(adapter, &crq);
3340
3341         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3342         atomic_inc(&adapter->running_cap_crqs);
3343         ibmvnic_send_crq(adapter, &crq);
3344
3345         crq.query_capability.capability =
3346                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3347         atomic_inc(&adapter->running_cap_crqs);
3348         ibmvnic_send_crq(adapter, &crq);
3349
3350         crq.query_capability.capability =
3351                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3352         atomic_inc(&adapter->running_cap_crqs);
3353         ibmvnic_send_crq(adapter, &crq);
3354
3355         crq.query_capability.capability =
3356                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3357         atomic_inc(&adapter->running_cap_crqs);
3358         ibmvnic_send_crq(adapter, &crq);
3359
3360         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3361         atomic_inc(&adapter->running_cap_crqs);
3362         ibmvnic_send_crq(adapter, &crq);
3363 }
3364
3365 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3366                                 struct ibmvnic_adapter *adapter)
3367 {
3368         struct device *dev = &adapter->vdev->dev;
3369
3370         if (crq->get_vpd_size_rsp.rc.code) {
3371                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3372                         crq->get_vpd_size_rsp.rc.code);
3373                 complete(&adapter->fw_done);
3374                 return;
3375         }
3376
3377         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3378         complete(&adapter->fw_done);
3379 }
3380
3381 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3382                            struct ibmvnic_adapter *adapter)
3383 {
3384         struct device *dev = &adapter->vdev->dev;
3385         unsigned char *substr = NULL;
3386         u8 fw_level_len = 0;
3387
3388         memset(adapter->fw_version, 0, 32);
3389
3390         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3391                          DMA_FROM_DEVICE);
3392
3393         if (crq->get_vpd_rsp.rc.code) {
3394                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3395                         crq->get_vpd_rsp.rc.code);
3396                 goto complete;
3397         }
3398
3399         /* get the position of the firmware version info
3400          * located after the ASCII 'RM' substring in the buffer
3401          */
3402         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3403         if (!substr) {
3404                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3405                 goto complete;
3406         }
3407
3408         /* get length of firmware level ASCII substring */
3409         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3410                 fw_level_len = *(substr + 2);
3411         } else {
3412                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3413                 goto complete;
3414         }
3415
3416         /* copy firmware version string from vpd into adapter */
3417         if ((substr + 3 + fw_level_len) <
3418             (adapter->vpd->buff + adapter->vpd->len)) {
3419                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3420         } else {
3421                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3422         }
3423
3424 complete:
3425         if (adapter->fw_version[0] == '\0')
3426                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3427         complete(&adapter->fw_done);
3428 }
3429
3430 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3431 {
3432         struct device *dev = &adapter->vdev->dev;
3433         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3434         union ibmvnic_crq crq;
3435         int i;
3436
3437         dma_unmap_single(dev, adapter->ip_offload_tok,
3438                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3439
3440         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3441         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3442                 netdev_dbg(adapter->netdev, "%016lx\n",
3443                            ((unsigned long int *)(buf))[i]);
3444
3445         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3446         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3447         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3448                    buf->tcp_ipv4_chksum);
3449         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3450                    buf->tcp_ipv6_chksum);
3451         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3452                    buf->udp_ipv4_chksum);
3453         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3454                    buf->udp_ipv6_chksum);
3455         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3456                    buf->large_tx_ipv4);
3457         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3458                    buf->large_tx_ipv6);
3459         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3460                    buf->large_rx_ipv4);
3461         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3462                    buf->large_rx_ipv6);
3463         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3464                    buf->max_ipv4_header_size);
3465         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3466                    buf->max_ipv6_header_size);
3467         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3468                    buf->max_tcp_header_size);
3469         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3470                    buf->max_udp_header_size);
3471         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3472                    buf->max_large_tx_size);
3473         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3474                    buf->max_large_rx_size);
3475         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3476                    buf->ipv6_extension_header);
3477         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3478                    buf->tcp_pseudosum_req);
3479         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3480                    buf->num_ipv6_ext_headers);
3481         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3482                    buf->off_ipv6_ext_headers);
3483
3484         adapter->ip_offload_ctrl_tok =
3485             dma_map_single(dev, &adapter->ip_offload_ctrl,
3486                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3487
3488         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3489                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3490                 return;
3491         }
3492
3493         adapter->ip_offload_ctrl.len =
3494             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3495         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3496         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3497         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3498         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3499         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3500         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3501         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3502         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3503         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3504
3505         /* large_rx disabled for now, additional features needed */
3506         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3507         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3508
3509         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3510
3511         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3512                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3513
3514         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3515                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3516
3517         if ((adapter->netdev->features &
3518             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3519                 adapter->netdev->features |= NETIF_F_RXCSUM;
3520
3521         if (buf->large_tx_ipv4)
3522                 adapter->netdev->features |= NETIF_F_TSO;
3523         if (buf->large_tx_ipv6)
3524                 adapter->netdev->features |= NETIF_F_TSO6;
3525
3526         adapter->netdev->hw_features |= adapter->netdev->features;
3527
3528         memset(&crq, 0, sizeof(crq));
3529         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3530         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3531         crq.control_ip_offload.len =
3532             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3533         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3534         ibmvnic_send_crq(adapter, &crq);
3535 }
3536
3537 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3538                                   struct ibmvnic_adapter *adapter)
3539 {
3540         struct device *dev = &adapter->vdev->dev;
3541         struct ibmvnic_error_buff *error_buff, *tmp;
3542         unsigned long flags;
3543         bool found = false;
3544         int i;
3545
3546         if (!crq->request_error_rsp.rc.code) {
3547                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3548                          crq->request_error_rsp.rc.code);
3549                 return;
3550         }
3551
3552         spin_lock_irqsave(&adapter->error_list_lock, flags);
3553         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3554                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3555                         found = true;
3556                         list_del(&error_buff->list);
3557                         break;
3558                 }
3559         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3560
3561         if (!found) {
3562                 dev_err(dev, "Couldn't find error id %x\n",
3563                         be32_to_cpu(crq->request_error_rsp.error_id));
3564                 return;
3565         }
3566
3567         dev_err(dev, "Detailed info for error id %x:",
3568                 be32_to_cpu(crq->request_error_rsp.error_id));
3569
3570         for (i = 0; i < error_buff->len; i++) {
3571                 pr_cont("%02x", (int)error_buff->buff[i]);
3572                 if (i % 8 == 7)
3573                         pr_cont(" ");
3574         }
3575         pr_cont("\n");
3576
3577         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3578                          DMA_FROM_DEVICE);
3579         kfree(error_buff->buff);
3580         kfree(error_buff);
3581 }
3582
3583 static void request_error_information(struct ibmvnic_adapter *adapter,
3584                                       union ibmvnic_crq *err_crq)
3585 {
3586         struct device *dev = &adapter->vdev->dev;
3587         struct net_device *netdev = adapter->netdev;
3588         struct ibmvnic_error_buff *error_buff;
3589         unsigned long timeout = msecs_to_jiffies(30000);
3590         union ibmvnic_crq crq;
3591         unsigned long flags;
3592         int rc, detail_len;
3593
3594         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3595         if (!error_buff)
3596                 return;
3597
3598         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3599         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3600         if (!error_buff->buff) {
3601                 kfree(error_buff);
3602                 return;
3603         }
3604
3605         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3606                                          DMA_FROM_DEVICE);
3607         if (dma_mapping_error(dev, error_buff->dma)) {
3608                 netdev_err(netdev, "Couldn't map error buffer\n");
3609                 kfree(error_buff->buff);
3610                 kfree(error_buff);
3611                 return;
3612         }
3613
3614         error_buff->len = detail_len;
3615         error_buff->error_id = err_crq->error_indication.error_id;
3616
3617         spin_lock_irqsave(&adapter->error_list_lock, flags);
3618         list_add_tail(&error_buff->list, &adapter->errors);
3619         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3620
3621         memset(&crq, 0, sizeof(crq));
3622         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3623         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3624         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3625         crq.request_error_info.len = cpu_to_be32(detail_len);
3626         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3627
3628         rc = ibmvnic_send_crq(adapter, &crq);
3629         if (rc) {
3630                 netdev_err(netdev, "failed to request error information\n");
3631                 goto err_info_fail;
3632         }
3633
3634         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3635                 netdev_err(netdev, "timeout waiting for error information\n");
3636                 goto err_info_fail;
3637         }
3638
3639         return;
3640
3641 err_info_fail:
3642         spin_lock_irqsave(&adapter->error_list_lock, flags);
3643         list_del(&error_buff->list);
3644         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3645
3646         kfree(error_buff->buff);
3647         kfree(error_buff);
3648 }
3649
3650 static void handle_error_indication(union ibmvnic_crq *crq,
3651                                     struct ibmvnic_adapter *adapter)
3652 {
3653         struct device *dev = &adapter->vdev->dev;
3654
3655         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3656                 crq->error_indication.flags
3657                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3658                 be32_to_cpu(crq->error_indication.error_id),
3659                 be16_to_cpu(crq->error_indication.error_cause));
3660
3661         if (be32_to_cpu(crq->error_indication.error_id))
3662                 request_error_information(adapter, crq);
3663
3664         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3665                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3666         else
3667                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3668 }
3669
3670 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3671                                  struct ibmvnic_adapter *adapter)
3672 {
3673         struct net_device *netdev = adapter->netdev;
3674         struct device *dev = &adapter->vdev->dev;
3675         long rc;
3676
3677         rc = crq->change_mac_addr_rsp.rc.code;
3678         if (rc) {
3679                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3680                 goto out;
3681         }
3682         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3683                ETH_ALEN);
3684 out:
3685         complete(&adapter->fw_done);
3686         return rc;
3687 }
3688
3689 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3690                                    struct ibmvnic_adapter *adapter)
3691 {
3692         struct device *dev = &adapter->vdev->dev;
3693         u64 *req_value;
3694         char *name;
3695
3696         atomic_dec(&adapter->running_cap_crqs);
3697         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3698         case REQ_TX_QUEUES:
3699                 req_value = &adapter->req_tx_queues;
3700                 name = "tx";
3701                 break;
3702         case REQ_RX_QUEUES:
3703                 req_value = &adapter->req_rx_queues;
3704                 name = "rx";
3705                 break;
3706         case REQ_RX_ADD_QUEUES:
3707                 req_value = &adapter->req_rx_add_queues;
3708                 name = "rx_add";
3709                 break;
3710         case REQ_TX_ENTRIES_PER_SUBCRQ:
3711                 req_value = &adapter->req_tx_entries_per_subcrq;
3712                 name = "tx_entries_per_subcrq";
3713                 break;
3714         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3715                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3716                 name = "rx_add_entries_per_subcrq";
3717                 break;
3718         case REQ_MTU:
3719                 req_value = &adapter->req_mtu;
3720                 name = "mtu";
3721                 break;
3722         case PROMISC_REQUESTED:
3723                 req_value = &adapter->promisc;
3724                 name = "promisc";
3725                 break;
3726         default:
3727                 dev_err(dev, "Got invalid cap request rsp %d\n",
3728                         crq->request_capability.capability);
3729                 return;
3730         }
3731
3732         switch (crq->request_capability_rsp.rc.code) {
3733         case SUCCESS:
3734                 break;
3735         case PARTIALSUCCESS:
3736                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3737                          *req_value,
3738                          (long int)be64_to_cpu(crq->request_capability_rsp.
3739                                                number), name);
3740
3741                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3742                     REQ_MTU) {
3743                         pr_err("mtu of %llu is not supported. Reverting.\n",
3744                                *req_value);
3745                         *req_value = adapter->fallback.mtu;
3746                 } else {
3747                         *req_value =
3748                                 be64_to_cpu(crq->request_capability_rsp.number);
3749                 }
3750
3751                 ibmvnic_send_req_caps(adapter, 1);
3752                 return;
3753         default:
3754                 dev_err(dev, "Error %d in request cap rsp\n",
3755                         crq->request_capability_rsp.rc.code);
3756                 return;
3757         }
3758
3759         /* Done receiving requested capabilities, query IP offload support */
3760         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3761                 union ibmvnic_crq newcrq;
3762                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3763                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3764                     &adapter->ip_offload_buf;
3765
3766                 adapter->wait_capability = false;
3767                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3768                                                          buf_sz,
3769                                                          DMA_FROM_DEVICE);
3770
3771                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3772                         if (!firmware_has_feature(FW_FEATURE_CMO))
3773                                 dev_err(dev, "Couldn't map offload buffer\n");
3774                         return;
3775                 }
3776
3777                 memset(&newcrq, 0, sizeof(newcrq));
3778                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3779                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3780                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3781                 newcrq.query_ip_offload.ioba =
3782                     cpu_to_be32(adapter->ip_offload_tok);
3783
3784                 ibmvnic_send_crq(adapter, &newcrq);
3785         }
3786 }
3787
3788 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3789                             struct ibmvnic_adapter *adapter)
3790 {
3791         struct device *dev = &adapter->vdev->dev;
3792         struct net_device *netdev = adapter->netdev;
3793         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3794         struct ibmvnic_login_buffer *login = adapter->login_buf;
3795         int i;
3796
3797         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3798                          DMA_BIDIRECTIONAL);
3799         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3800                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3801
3802         /* If the number of queues requested can't be allocated by the
3803          * server, the login response will return with code 1. We will need
3804          * to resend the login buffer with fewer queues requested.
3805          */
3806         if (login_rsp_crq->generic.rc.code) {
3807                 adapter->renegotiate = true;
3808                 complete(&adapter->init_done);
3809                 return 0;
3810         }
3811
3812         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3813
3814         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3815         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3816                 netdev_dbg(adapter->netdev, "%016lx\n",
3817                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3818         }
3819
3820         /* Sanity checks */
3821         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3822             (be32_to_cpu(login->num_rxcomp_subcrqs) *
3823              adapter->req_rx_add_queues !=
3824              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3825                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3826                 ibmvnic_remove(adapter->vdev);
3827                 return -EIO;
3828         }
3829         release_login_buffer(adapter);
3830         complete(&adapter->init_done);
3831
3832         return 0;
3833 }
3834
3835 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3836                                      struct ibmvnic_adapter *adapter)
3837 {
3838         struct device *dev = &adapter->vdev->dev;
3839         long rc;
3840
3841         rc = crq->request_unmap_rsp.rc.code;
3842         if (rc)
3843                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3844 }
3845
3846 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3847                                  struct ibmvnic_adapter *adapter)
3848 {
3849         struct net_device *netdev = adapter->netdev;
3850         struct device *dev = &adapter->vdev->dev;
3851         long rc;
3852
3853         rc = crq->query_map_rsp.rc.code;
3854         if (rc) {
3855                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3856                 return;
3857         }
3858         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3859                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3860                    crq->query_map_rsp.free_pages);
3861 }
3862
3863 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3864                                  struct ibmvnic_adapter *adapter)
3865 {
3866         struct net_device *netdev = adapter->netdev;
3867         struct device *dev = &adapter->vdev->dev;
3868         long rc;
3869
3870         atomic_dec(&adapter->running_cap_crqs);
3871         netdev_dbg(netdev, "Outstanding queries: %d\n",
3872                    atomic_read(&adapter->running_cap_crqs));
3873         rc = crq->query_capability.rc.code;
3874         if (rc) {
3875                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3876                 goto out;
3877         }
3878
3879         switch (be16_to_cpu(crq->query_capability.capability)) {
3880         case MIN_TX_QUEUES:
3881                 adapter->min_tx_queues =
3882                     be64_to_cpu(crq->query_capability.number);
3883                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3884                            adapter->min_tx_queues);
3885                 break;
3886         case MIN_RX_QUEUES:
3887                 adapter->min_rx_queues =
3888                     be64_to_cpu(crq->query_capability.number);
3889                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3890                            adapter->min_rx_queues);
3891                 break;
3892         case MIN_RX_ADD_QUEUES:
3893                 adapter->min_rx_add_queues =
3894                     be64_to_cpu(crq->query_capability.number);
3895                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3896                            adapter->min_rx_add_queues);
3897                 break;
3898         case MAX_TX_QUEUES:
3899                 adapter->max_tx_queues =
3900                     be64_to_cpu(crq->query_capability.number);
3901                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3902                            adapter->max_tx_queues);
3903                 break;
3904         case MAX_RX_QUEUES:
3905                 adapter->max_rx_queues =
3906                     be64_to_cpu(crq->query_capability.number);
3907                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3908                            adapter->max_rx_queues);
3909                 break;
3910         case MAX_RX_ADD_QUEUES:
3911                 adapter->max_rx_add_queues =
3912                     be64_to_cpu(crq->query_capability.number);
3913                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3914                            adapter->max_rx_add_queues);
3915                 break;
3916         case MIN_TX_ENTRIES_PER_SUBCRQ:
3917                 adapter->min_tx_entries_per_subcrq =
3918                     be64_to_cpu(crq->query_capability.number);
3919                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3920                            adapter->min_tx_entries_per_subcrq);
3921                 break;
3922         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3923                 adapter->min_rx_add_entries_per_subcrq =
3924                     be64_to_cpu(crq->query_capability.number);
3925                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3926                            adapter->min_rx_add_entries_per_subcrq);
3927                 break;
3928         case MAX_TX_ENTRIES_PER_SUBCRQ:
3929                 adapter->max_tx_entries_per_subcrq =
3930                     be64_to_cpu(crq->query_capability.number);
3931                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3932                            adapter->max_tx_entries_per_subcrq);
3933                 break;
3934         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3935                 adapter->max_rx_add_entries_per_subcrq =
3936                     be64_to_cpu(crq->query_capability.number);
3937                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3938                            adapter->max_rx_add_entries_per_subcrq);
3939                 break;
3940         case TCP_IP_OFFLOAD:
3941                 adapter->tcp_ip_offload =
3942                     be64_to_cpu(crq->query_capability.number);
3943                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3944                            adapter->tcp_ip_offload);
3945                 break;
3946         case PROMISC_SUPPORTED:
3947                 adapter->promisc_supported =
3948                     be64_to_cpu(crq->query_capability.number);
3949                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3950                            adapter->promisc_supported);
3951                 break;
3952         case MIN_MTU:
3953                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3954                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3955                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3956                 break;
3957         case MAX_MTU:
3958                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3959                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3960                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3961                 break;
3962         case MAX_MULTICAST_FILTERS:
3963                 adapter->max_multicast_filters =
3964                     be64_to_cpu(crq->query_capability.number);
3965                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3966                            adapter->max_multicast_filters);
3967                 break;
3968         case VLAN_HEADER_INSERTION:
3969                 adapter->vlan_header_insertion =
3970                     be64_to_cpu(crq->query_capability.number);
3971                 if (adapter->vlan_header_insertion)
3972                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3973                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3974                            adapter->vlan_header_insertion);
3975                 break;
3976         case RX_VLAN_HEADER_INSERTION:
3977                 adapter->rx_vlan_header_insertion =
3978                     be64_to_cpu(crq->query_capability.number);
3979                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3980                            adapter->rx_vlan_header_insertion);
3981                 break;
3982         case MAX_TX_SG_ENTRIES:
3983                 adapter->max_tx_sg_entries =
3984                     be64_to_cpu(crq->query_capability.number);
3985                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3986                            adapter->max_tx_sg_entries);
3987                 break;
3988         case RX_SG_SUPPORTED:
3989                 adapter->rx_sg_supported =
3990                     be64_to_cpu(crq->query_capability.number);
3991                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3992                            adapter->rx_sg_supported);
3993                 break;
3994         case OPT_TX_COMP_SUB_QUEUES:
3995                 adapter->opt_tx_comp_sub_queues =
3996                     be64_to_cpu(crq->query_capability.number);
3997                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3998                            adapter->opt_tx_comp_sub_queues);
3999                 break;
4000         case OPT_RX_COMP_QUEUES:
4001                 adapter->opt_rx_comp_queues =
4002                     be64_to_cpu(crq->query_capability.number);
4003                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4004                            adapter->opt_rx_comp_queues);
4005                 break;
4006         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4007                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4008                     be64_to_cpu(crq->query_capability.number);
4009                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4010                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4011                 break;
4012         case OPT_TX_ENTRIES_PER_SUBCRQ:
4013                 adapter->opt_tx_entries_per_subcrq =
4014                     be64_to_cpu(crq->query_capability.number);
4015                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4016                            adapter->opt_tx_entries_per_subcrq);
4017                 break;
4018         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4019                 adapter->opt_rxba_entries_per_subcrq =
4020                     be64_to_cpu(crq->query_capability.number);
4021                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4022                            adapter->opt_rxba_entries_per_subcrq);
4023                 break;
4024         case TX_RX_DESC_REQ:
4025                 adapter->tx_rx_desc_req = crq->query_capability.number;
4026                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4027                            adapter->tx_rx_desc_req);
4028                 break;
4029
4030         default:
4031                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4032                            crq->query_capability.capability);
4033         }
4034
4035 out:
4036         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4037                 adapter->wait_capability = false;
4038                 ibmvnic_send_req_caps(adapter, 0);
4039         }
4040 }
4041
4042 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4043                                struct ibmvnic_adapter *adapter)
4044 {
4045         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4046         struct net_device *netdev = adapter->netdev;
4047         struct device *dev = &adapter->vdev->dev;
4048         u64 *u64_crq = (u64 *)crq;
4049         long rc;
4050
4051         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4052                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4053                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4054         switch (gen_crq->first) {
4055         case IBMVNIC_CRQ_INIT_RSP:
4056                 switch (gen_crq->cmd) {
4057                 case IBMVNIC_CRQ_INIT:
4058                         dev_info(dev, "Partner initialized\n");
4059                         adapter->from_passive_init = true;
4060                         complete(&adapter->init_done);
4061                         break;
4062                 case IBMVNIC_CRQ_INIT_COMPLETE:
4063                         dev_info(dev, "Partner initialization complete\n");
4064                         send_version_xchg(adapter);
4065                         break;
4066                 default:
4067                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4068                 }
4069                 return;
4070         case IBMVNIC_CRQ_XPORT_EVENT:
4071                 netif_carrier_off(netdev);
4072                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4073                         dev_info(dev, "Migrated, re-enabling adapter\n");
4074                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4075                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4076                         dev_info(dev, "Backing device failover detected\n");
4077                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4078                 } else {
4079                         /* The adapter lost the connection */
4080                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4081                                 gen_crq->cmd);
4082                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4083                 }
4084                 return;
4085         case IBMVNIC_CRQ_CMD_RSP:
4086                 break;
4087         default:
4088                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4089                         gen_crq->first);
4090                 return;
4091         }
4092
4093         switch (gen_crq->cmd) {
4094         case VERSION_EXCHANGE_RSP:
4095                 rc = crq->version_exchange_rsp.rc.code;
4096                 if (rc) {
4097                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4098                         break;
4099                 }
4100                 dev_info(dev, "Partner protocol version is %d\n",
4101                          crq->version_exchange_rsp.version);
4102                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4103                     ibmvnic_version)
4104                         ibmvnic_version =
4105                             be16_to_cpu(crq->version_exchange_rsp.version);
4106                 send_cap_queries(adapter);
4107                 break;
4108         case QUERY_CAPABILITY_RSP:
4109                 handle_query_cap_rsp(crq, adapter);
4110                 break;
4111         case QUERY_MAP_RSP:
4112                 handle_query_map_rsp(crq, adapter);
4113                 break;
4114         case REQUEST_MAP_RSP:
4115                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4116                 complete(&adapter->fw_done);
4117                 break;
4118         case REQUEST_UNMAP_RSP:
4119                 handle_request_unmap_rsp(crq, adapter);
4120                 break;
4121         case REQUEST_CAPABILITY_RSP:
4122                 handle_request_cap_rsp(crq, adapter);
4123                 break;
4124         case LOGIN_RSP:
4125                 netdev_dbg(netdev, "Got Login Response\n");
4126                 handle_login_rsp(crq, adapter);
4127                 break;
4128         case LOGICAL_LINK_STATE_RSP:
4129                 netdev_dbg(netdev,
4130                            "Got Logical Link State Response, state: %d rc: %d\n",
4131                            crq->logical_link_state_rsp.link_state,
4132                            crq->logical_link_state_rsp.rc.code);
4133                 adapter->logical_link_state =
4134                     crq->logical_link_state_rsp.link_state;
4135                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4136                 complete(&adapter->init_done);
4137                 break;
4138         case LINK_STATE_INDICATION:
4139                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4140                 adapter->phys_link_state =
4141                     crq->link_state_indication.phys_link_state;
4142                 adapter->logical_link_state =
4143                     crq->link_state_indication.logical_link_state;
4144                 break;
4145         case CHANGE_MAC_ADDR_RSP:
4146                 netdev_dbg(netdev, "Got MAC address change Response\n");
4147                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4148                 break;
4149         case ERROR_INDICATION:
4150                 netdev_dbg(netdev, "Got Error Indication\n");
4151                 handle_error_indication(crq, adapter);
4152                 break;
4153         case REQUEST_ERROR_RSP:
4154                 netdev_dbg(netdev, "Got Error Detail Response\n");
4155                 handle_error_info_rsp(crq, adapter);
4156                 break;
4157         case REQUEST_STATISTICS_RSP:
4158                 netdev_dbg(netdev, "Got Statistics Response\n");
4159                 complete(&adapter->stats_done);
4160                 break;
4161         case QUERY_IP_OFFLOAD_RSP:
4162                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4163                 handle_query_ip_offload_rsp(adapter);
4164                 break;
4165         case MULTICAST_CTRL_RSP:
4166                 netdev_dbg(netdev, "Got multicast control Response\n");
4167                 break;
4168         case CONTROL_IP_OFFLOAD_RSP:
4169                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4170                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4171                                  sizeof(adapter->ip_offload_ctrl),
4172                                  DMA_TO_DEVICE);
4173                 complete(&adapter->init_done);
4174                 break;
4175         case COLLECT_FW_TRACE_RSP:
4176                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4177                 complete(&adapter->fw_done);
4178                 break;
4179         case GET_VPD_SIZE_RSP:
4180                 handle_vpd_size_rsp(crq, adapter);
4181                 break;
4182         case GET_VPD_RSP:
4183                 handle_vpd_rsp(crq, adapter);
4184                 break;
4185         default:
4186                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4187                            gen_crq->cmd);
4188         }
4189 }
4190
4191 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4192 {
4193         struct ibmvnic_adapter *adapter = instance;
4194
4195         tasklet_schedule(&adapter->tasklet);
4196         return IRQ_HANDLED;
4197 }
4198
4199 static void ibmvnic_tasklet(void *data)
4200 {
4201         struct ibmvnic_adapter *adapter = data;
4202         struct ibmvnic_crq_queue *queue = &adapter->crq;
4203         union ibmvnic_crq *crq;
4204         unsigned long flags;
4205         bool done = false;
4206
4207         spin_lock_irqsave(&queue->lock, flags);
4208         while (!done) {
4209                 /* Pull all the valid messages off the CRQ */
4210                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4211                         ibmvnic_handle_crq(crq, adapter);
4212                         crq->generic.first = 0;
4213                 }
4214
4215                 /* remain in tasklet until all
4216                  * capabilities responses are received
4217                  */
4218                 if (!adapter->wait_capability)
4219                         done = true;
4220         }
4221         /* if capabilities CRQ's were sent in this tasklet, the following
4222          * tasklet must wait until all responses are received
4223          */
4224         if (atomic_read(&adapter->running_cap_crqs) != 0)
4225                 adapter->wait_capability = true;
4226         spin_unlock_irqrestore(&queue->lock, flags);
4227 }
4228
4229 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4230 {
4231         struct vio_dev *vdev = adapter->vdev;
4232         int rc;
4233
4234         do {
4235                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4236         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4237
4238         if (rc)
4239                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4240
4241         return rc;
4242 }
4243
4244 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4245 {
4246         struct ibmvnic_crq_queue *crq = &adapter->crq;
4247         struct device *dev = &adapter->vdev->dev;
4248         struct vio_dev *vdev = adapter->vdev;
4249         int rc;
4250
4251         /* Close the CRQ */
4252         do {
4253                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4254         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4255
4256         /* Clean out the queue */
4257         memset(crq->msgs, 0, PAGE_SIZE);
4258         crq->cur = 0;
4259
4260         /* And re-open it again */
4261         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4262                                 crq->msg_token, PAGE_SIZE);
4263
4264         if (rc == H_CLOSED)
4265                 /* Adapter is good, but other end is not ready */
4266                 dev_warn(dev, "Partner adapter not ready\n");
4267         else if (rc != 0)
4268                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4269
4270         return rc;
4271 }
4272
4273 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4274 {
4275         struct ibmvnic_crq_queue *crq = &adapter->crq;
4276         struct vio_dev *vdev = adapter->vdev;
4277         long rc;
4278
4279         if (!crq->msgs)
4280                 return;
4281
4282         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4283         free_irq(vdev->irq, adapter);
4284         tasklet_kill(&adapter->tasklet);
4285         do {
4286                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4287         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4288
4289         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4290                          DMA_BIDIRECTIONAL);
4291         free_page((unsigned long)crq->msgs);
4292         crq->msgs = NULL;
4293 }
4294
4295 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4296 {
4297         struct ibmvnic_crq_queue *crq = &adapter->crq;
4298         struct device *dev = &adapter->vdev->dev;
4299         struct vio_dev *vdev = adapter->vdev;
4300         int rc, retrc = -ENOMEM;
4301
4302         if (crq->msgs)
4303                 return 0;
4304
4305         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4306         /* Should we allocate more than one page? */
4307
4308         if (!crq->msgs)
4309                 return -ENOMEM;
4310
4311         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4312         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4313                                         DMA_BIDIRECTIONAL);
4314         if (dma_mapping_error(dev, crq->msg_token))
4315                 goto map_failed;
4316
4317         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4318                                 crq->msg_token, PAGE_SIZE);
4319
4320         if (rc == H_RESOURCE)
4321                 /* maybe kexecing and resource is busy. try a reset */
4322                 rc = ibmvnic_reset_crq(adapter);
4323         retrc = rc;
4324
4325         if (rc == H_CLOSED) {
4326                 dev_warn(dev, "Partner adapter not ready\n");
4327         } else if (rc) {
4328                 dev_warn(dev, "Error %d opening adapter\n", rc);
4329                 goto reg_crq_failed;
4330         }
4331
4332         retrc = 0;
4333
4334         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4335                      (unsigned long)adapter);
4336
4337         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4338         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4339                          adapter);
4340         if (rc) {
4341                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4342                         vdev->irq, rc);
4343                 goto req_irq_failed;
4344         }
4345
4346         rc = vio_enable_interrupts(vdev);
4347         if (rc) {
4348                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4349                 goto req_irq_failed;
4350         }
4351
4352         crq->cur = 0;
4353         spin_lock_init(&crq->lock);
4354
4355         return retrc;
4356
4357 req_irq_failed:
4358         tasklet_kill(&adapter->tasklet);
4359         do {
4360                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4361         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4362 reg_crq_failed:
4363         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4364 map_failed:
4365         free_page((unsigned long)crq->msgs);
4366         crq->msgs = NULL;
4367         return retrc;
4368 }
4369
4370 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4371 {
4372         struct device *dev = &adapter->vdev->dev;
4373         unsigned long timeout = msecs_to_jiffies(30000);
4374         u64 old_num_rx_queues, old_num_tx_queues;
4375         int rc;
4376
4377         if (adapter->resetting && !adapter->wait_for_reset) {
4378                 rc = ibmvnic_reset_crq(adapter);
4379                 if (!rc)
4380                         rc = vio_enable_interrupts(adapter->vdev);
4381         } else {
4382                 rc = init_crq_queue(adapter);
4383         }
4384
4385         if (rc) {
4386                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4387                 return rc;
4388         }
4389
4390         adapter->from_passive_init = false;
4391
4392         old_num_rx_queues = adapter->req_rx_queues;
4393         old_num_tx_queues = adapter->req_tx_queues;
4394
4395         init_completion(&adapter->init_done);
4396         adapter->init_done_rc = 0;
4397         ibmvnic_send_crq_init(adapter);
4398         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4399                 dev_err(dev, "Initialization sequence timed out\n");
4400                 return -1;
4401         }
4402
4403         if (adapter->init_done_rc) {
4404                 release_crq_queue(adapter);
4405                 return adapter->init_done_rc;
4406         }
4407
4408         if (adapter->from_passive_init) {
4409                 adapter->state = VNIC_OPEN;
4410                 adapter->from_passive_init = false;
4411                 return -1;
4412         }
4413
4414         if (adapter->resetting && !adapter->wait_for_reset) {
4415                 if (adapter->req_rx_queues != old_num_rx_queues ||
4416                     adapter->req_tx_queues != old_num_tx_queues) {
4417                         release_sub_crqs(adapter, 0);
4418                         rc = init_sub_crqs(adapter);
4419                 } else {
4420                         rc = reset_sub_crq_queues(adapter);
4421                 }
4422         } else {
4423                 rc = init_sub_crqs(adapter);
4424         }
4425
4426         if (rc) {
4427                 dev_err(dev, "Initialization of sub crqs failed\n");
4428                 release_crq_queue(adapter);
4429                 return rc;
4430         }
4431
4432         rc = init_sub_crq_irqs(adapter);
4433         if (rc) {
4434                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4435                 release_crq_queue(adapter);
4436         }
4437
4438         rc = init_stats_buffers(adapter);
4439         if (rc)
4440                 return rc;
4441
4442         rc = init_stats_token(adapter);
4443         if (rc)
4444                 return rc;
4445
4446         return rc;
4447 }
4448
4449 static struct device_attribute dev_attr_failover;
4450
4451 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4452 {
4453         struct ibmvnic_adapter *adapter;
4454         struct net_device *netdev;
4455         unsigned char *mac_addr_p;
4456         int rc;
4457
4458         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4459                 dev->unit_address);
4460
4461         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4462                                                         VETH_MAC_ADDR, NULL);
4463         if (!mac_addr_p) {
4464                 dev_err(&dev->dev,
4465                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4466                         __FILE__, __LINE__);
4467                 return 0;
4468         }
4469
4470         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4471                                    IBMVNIC_MAX_QUEUES);
4472         if (!netdev)
4473                 return -ENOMEM;
4474
4475         adapter = netdev_priv(netdev);
4476         adapter->state = VNIC_PROBING;
4477         dev_set_drvdata(&dev->dev, netdev);
4478         adapter->vdev = dev;
4479         adapter->netdev = netdev;
4480
4481         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4482         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4483         netdev->irq = dev->irq;
4484         netdev->netdev_ops = &ibmvnic_netdev_ops;
4485         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4486         SET_NETDEV_DEV(netdev, &dev->dev);
4487
4488         spin_lock_init(&adapter->stats_lock);
4489
4490         INIT_LIST_HEAD(&adapter->errors);
4491         spin_lock_init(&adapter->error_list_lock);
4492
4493         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4494         INIT_LIST_HEAD(&adapter->rwi_list);
4495         mutex_init(&adapter->reset_lock);
4496         mutex_init(&adapter->rwi_lock);
4497         adapter->resetting = false;
4498
4499         adapter->mac_change_pending = false;
4500
4501         do {
4502                 rc = ibmvnic_init(adapter);
4503                 if (rc && rc != EAGAIN)
4504                         goto ibmvnic_init_fail;
4505         } while (rc == EAGAIN);
4506
4507         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4508         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4509         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4510
4511         rc = device_create_file(&dev->dev, &dev_attr_failover);
4512         if (rc)
4513                 goto ibmvnic_init_fail;
4514
4515         netif_carrier_off(netdev);
4516         rc = register_netdev(netdev);
4517         if (rc) {
4518                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4519                 goto ibmvnic_register_fail;
4520         }
4521         dev_info(&dev->dev, "ibmvnic registered\n");
4522
4523         adapter->state = VNIC_PROBED;
4524
4525         adapter->wait_for_reset = false;
4526
4527         return 0;
4528
4529 ibmvnic_register_fail:
4530         device_remove_file(&dev->dev, &dev_attr_failover);
4531
4532 ibmvnic_init_fail:
4533         release_sub_crqs(adapter, 1);
4534         release_crq_queue(adapter);
4535         free_netdev(netdev);
4536
4537         return rc;
4538 }
4539
4540 static int ibmvnic_remove(struct vio_dev *dev)
4541 {
4542         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4543         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4544
4545         adapter->state = VNIC_REMOVING;
4546         unregister_netdev(netdev);
4547         mutex_lock(&adapter->reset_lock);
4548
4549         release_resources(adapter);
4550         release_sub_crqs(adapter, 1);
4551         release_crq_queue(adapter);
4552
4553         release_stats_token(adapter);
4554         release_stats_buffers(adapter);
4555
4556         adapter->state = VNIC_REMOVED;
4557
4558         mutex_unlock(&adapter->reset_lock);
4559         device_remove_file(&dev->dev, &dev_attr_failover);
4560         free_netdev(netdev);
4561         dev_set_drvdata(&dev->dev, NULL);
4562
4563         return 0;
4564 }
4565
4566 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4567                               const char *buf, size_t count)
4568 {
4569         struct net_device *netdev = dev_get_drvdata(dev);
4570         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4571         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4572         __be64 session_token;
4573         long rc;
4574
4575         if (!sysfs_streq(buf, "1"))
4576                 return -EINVAL;
4577
4578         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4579                          H_GET_SESSION_TOKEN, 0, 0, 0);
4580         if (rc) {
4581                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4582                            rc);
4583                 return -EINVAL;
4584         }
4585
4586         session_token = (__be64)retbuf[0];
4587         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4588                    be64_to_cpu(session_token));
4589         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4590                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4591         if (rc) {
4592                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4593                            rc);
4594                 return -EINVAL;
4595         }
4596
4597         return count;
4598 }
4599
4600 static DEVICE_ATTR_WO(failover);
4601
4602 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4603 {
4604         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4605         struct ibmvnic_adapter *adapter;
4606         struct iommu_table *tbl;
4607         unsigned long ret = 0;
4608         int i;
4609
4610         tbl = get_iommu_table_base(&vdev->dev);
4611
4612         /* netdev inits at probe time along with the structures we need below*/
4613         if (!netdev)
4614                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4615
4616         adapter = netdev_priv(netdev);
4617
4618         ret += PAGE_SIZE; /* the crq message queue */
4619         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4620
4621         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4622                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4623
4624         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4625              i++)
4626                 ret += adapter->rx_pool[i].size *
4627                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4628
4629         return ret;
4630 }
4631
4632 static int ibmvnic_resume(struct device *dev)
4633 {
4634         struct net_device *netdev = dev_get_drvdata(dev);
4635         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4636
4637         if (adapter->state != VNIC_OPEN)
4638                 return 0;
4639
4640         tasklet_schedule(&adapter->tasklet);
4641
4642         return 0;
4643 }
4644
4645 static const struct vio_device_id ibmvnic_device_table[] = {
4646         {"network", "IBM,vnic"},
4647         {"", "" }
4648 };
4649 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4650
4651 static const struct dev_pm_ops ibmvnic_pm_ops = {
4652         .resume = ibmvnic_resume
4653 };
4654
4655 static struct vio_driver ibmvnic_driver = {
4656         .id_table       = ibmvnic_device_table,
4657         .probe          = ibmvnic_probe,
4658         .remove         = ibmvnic_remove,
4659         .get_desired_dma = ibmvnic_get_desired_dma,
4660         .name           = ibmvnic_driver_name,
4661         .pm             = &ibmvnic_pm_ops,
4662 };
4663
4664 /* module functions */
4665 static int __init ibmvnic_module_init(void)
4666 {
4667         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4668                 IBMVNIC_DRIVER_VERSION);
4669
4670         return vio_register_driver(&ibmvnic_driver);
4671 }
4672
4673 static void __exit ibmvnic_module_exit(void)
4674 {
4675         vio_unregister_driver(&ibmvnic_driver);
4676 }
4677
4678 module_init(ibmvnic_module_init);
4679 module_exit(ibmvnic_module_exit);