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 int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static int 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 int ibmvnic_reset_init(struct ibmvnic_adapter *);
 120 static void release_crq_queue(struct ibmvnic_adapter *);
 121 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
 122 static int init_crq_queue(struct ibmvnic_adapter *adapter);
 123
 124 struct ibmvnic_stat {
 125         char name[ETH_GSTRING_LEN];
 126         int offset;
 127 };
 128
 129 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 130                              offsetof(struct ibmvnic_statistics, stat))
 131 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 132
 133 static const struct ibmvnic_stat ibmvnic_stats[] = {
 134         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 135         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 136         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 137         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 138         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 139         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 140         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 141         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 142         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 143         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 144         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 145         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 146         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 147         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 148         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 149         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 150         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 151         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 152         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 153         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 154         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 155         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 156 };
 157
 158 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 159                           unsigned long length, unsigned long *number,
 160                           unsigned long *irq)
 161 {
 162         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 163         long rc;
 164
 165         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 166         *number = retbuf[0];
 167         *irq = retbuf[1];
 168
 169         return rc;
 170 }
 171
 172 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 173                                 struct ibmvnic_long_term_buff *ltb, int size)
 174 {
 175         struct device *dev = &adapter->vdev->dev;
 176         int rc;
 177
 178         ltb->size = size;
 179         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 180                                        GFP_KERNEL);
 181
 182         if (!ltb->buff) {
 183                 dev_err(dev, "Couldn't alloc long term buffer\n");
 184                 return -ENOMEM;
 185         }
 186         ltb->map_id = adapter->map_id;
 187         adapter->map_id++;
 188
 189         init_completion(&adapter->fw_done);
 190         rc = send_request_map(adapter, ltb->addr,
 191                               ltb->size, ltb->map_id);
 192         if (rc) {
 193                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 194                 return rc;
 195         }
 196         wait_for_completion(&adapter->fw_done);
 197
 198         if (adapter->fw_done_rc) {
 199                 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
 200                         adapter->fw_done_rc);
 201                 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 202                 return -1;
 203         }
 204         return 0;
 205 }
 206
 207 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 208                                 struct ibmvnic_long_term_buff *ltb)
 209 {
 210         struct device *dev = &adapter->vdev->dev;
 211
 212         if (!ltb->buff)
 213                 return;
 214
 215         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 216             adapter->reset_reason != VNIC_RESET_MOBILITY)
 217                 send_request_unmap(adapter, ltb->map_id);
 218         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 219 }
 220
 221 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
 222                                 struct ibmvnic_long_term_buff *ltb)
 223 {
 224         int rc;
 225
 226         memset(ltb->buff, 0, ltb->size);
 227
 228         init_completion(&adapter->fw_done);
 229         rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
 230         if (rc)
 231                 return rc;
 232         wait_for_completion(&adapter->fw_done);
 233
 234         if (adapter->fw_done_rc) {
 235                 dev_info(&adapter->vdev->dev,
 236                          "Reset failed, attempting to free and reallocate buffer\n");
 237                 free_long_term_buff(adapter, ltb);
 238                 return alloc_long_term_buff(adapter, ltb, ltb->size);
 239         }
 240         return 0;
 241 }
 242
 243 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
 244 {
 245         int i;
 246
 247         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 248              i++)
 249                 adapter->rx_pool[i].active = 0;
 250 }
 251
 252 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 253                               struct ibmvnic_rx_pool *pool)
 254 {
 255         int count = pool->size - atomic_read(&pool->available);
 256         struct device *dev = &adapter->vdev->dev;
 257         int buffers_added = 0;
 258         unsigned long lpar_rc;
 259         union sub_crq sub_crq;
 260         struct sk_buff *skb;
 261         unsigned int offset;
 262         dma_addr_t dma_addr;
 263         unsigned char *dst;
 264         u64 *handle_array;
 265         int shift = 0;
 266         int index;
 267         int i;
 268
 269         if (!pool->active)
 270                 return;
 271
 272         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 273                                       be32_to_cpu(adapter->login_rsp_buf->
 274                                       off_rxadd_subcrqs));
 275
 276         for (i = 0; i < count; ++i) {
 277                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 278                 if (!skb) {
 279                         dev_err(dev, "Couldn't replenish rx buff\n");
 280                         adapter->replenish_no_mem++;
 281                         break;
 282                 }
 283
 284                 index = pool->free_map[pool->next_free];
 285
 286                 if (pool->rx_buff[index].skb)
 287                         dev_err(dev, "Inconsistent free_map!\n");
 288
 289                 /* Copy the skb to the long term mapped DMA buffer */
 290                 offset = index * pool->buff_size;
 291                 dst = pool->long_term_buff.buff + offset;
 292                 memset(dst, 0, pool->buff_size);
 293                 dma_addr = pool->long_term_buff.addr + offset;
 294                 pool->rx_buff[index].data = dst;
 295
 296                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 297                 pool->rx_buff[index].dma = dma_addr;
 298                 pool->rx_buff[index].skb = skb;
 299                 pool->rx_buff[index].pool_index = pool->index;
 300                 pool->rx_buff[index].size = pool->buff_size;
 301
 302                 memset(&sub_crq, 0, sizeof(sub_crq));
 303                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 304                 sub_crq.rx_add.correlator =
 305                     cpu_to_be64((u64)&pool->rx_buff[index]);
 306                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 307                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 308
 309                 /* The length field of the sCRQ is defined to be 24 bits so the
 310                  * buffer size needs to be left shifted by a byte before it is
 311                  * converted to big endian to prevent the last byte from being
 312                  * truncated.
 313                  */
 314 #ifdef __LITTLE_ENDIAN__
 315                 shift = 8;
 316 #endif
 317                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 318
 319                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 320                                       &sub_crq);
 321                 if (lpar_rc != H_SUCCESS)
 322                         goto failure;
 323
 324                 buffers_added++;
 325                 adapter->replenish_add_buff_success++;
 326                 pool->next_free = (pool->next_free + 1) % pool->size;
 327         }
 328         atomic_add(buffers_added, &pool->available);
 329         return;
 330
 331 failure:
 332         if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
 333                 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
 334         pool->free_map[pool->next_free] = index;
 335         pool->rx_buff[index].skb = NULL;
 336
 337         dev_kfree_skb_any(skb);
 338         adapter->replenish_add_buff_failure++;
 339         atomic_add(buffers_added, &pool->available);
 340
 341         if (lpar_rc == H_CLOSED || adapter->failover_pending) {
 342                 /* Disable buffer pool replenishment and report carrier off if
 343                  * queue is closed or pending failover.
 344                  * Firmware guarantees that a signal will be sent to the
 345                  * driver, triggering a reset.
 346                  */
 347                 deactivate_rx_pools(adapter);
 348                 netif_carrier_off(adapter->netdev);
 349         }
 350 }
 351
 352 static void replenish_pools(struct ibmvnic_adapter *adapter)
 353 {
 354         int i;
 355
 356         adapter->replenish_task_cycles++;
 357         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 358              i++) {
 359                 if (adapter->rx_pool[i].active)
 360                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 361         }
 362 }
 363
 364 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 365 {
 366         kfree(adapter->tx_stats_buffers);
 367         kfree(adapter->rx_stats_buffers);
 368         adapter->tx_stats_buffers = NULL;
 369         adapter->rx_stats_buffers = NULL;
 370 }
 371
 372 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 373 {
 374         adapter->tx_stats_buffers =
 375                                 kcalloc(IBMVNIC_MAX_QUEUES,
 376                                         sizeof(struct ibmvnic_tx_queue_stats),
 377                                         GFP_KERNEL);
 378         if (!adapter->tx_stats_buffers)
 379                 return -ENOMEM;
 380
 381         adapter->rx_stats_buffers =
 382                                 kcalloc(IBMVNIC_MAX_QUEUES,
 383                                         sizeof(struct ibmvnic_rx_queue_stats),
 384                                         GFP_KERNEL);
 385         if (!adapter->rx_stats_buffers)
 386                 return -ENOMEM;
 387
 388         return 0;
 389 }
 390
 391 static void release_stats_token(struct ibmvnic_adapter *adapter)
 392 {
 393         struct device *dev = &adapter->vdev->dev;
 394
 395         if (!adapter->stats_token)
 396                 return;
 397
 398         dma_unmap_single(dev, adapter->stats_token,
 399                          sizeof(struct ibmvnic_statistics),
 400                          DMA_FROM_DEVICE);
 401         adapter->stats_token = 0;
 402 }
 403
 404 static int init_stats_token(struct ibmvnic_adapter *adapter)
 405 {
 406         struct device *dev = &adapter->vdev->dev;
 407         dma_addr_t stok;
 408
 409         stok = dma_map_single(dev, &adapter->stats,
 410                               sizeof(struct ibmvnic_statistics),
 411                               DMA_FROM_DEVICE);
 412         if (dma_mapping_error(dev, stok)) {
 413                 dev_err(dev, "Couldn't map stats buffer\n");
 414                 return -1;
 415         }
 416
 417         adapter->stats_token = stok;
 418         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 419         return 0;
 420 }
 421
 422 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 423 {
 424         struct ibmvnic_rx_pool *rx_pool;
 425         int rx_scrqs;
 426         int i, j, rc;
 427         u64 *size_array;
 428
 429         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 430                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 431
 432         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 433         for (i = 0; i < rx_scrqs; i++) {
 434                 rx_pool = &adapter->rx_pool[i];
 435
 436                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 437
 438                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 439                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 440                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 441                         alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 442                                              rx_pool->size *
 443                                              rx_pool->buff_size);
 444                 } else {
 445                         rc = reset_long_term_buff(adapter,
 446                                                   &rx_pool->long_term_buff);
 447                 }
 448
 449                 if (rc)
 450                         return rc;
 451
 452                 for (j = 0; j < rx_pool->size; j++)
 453                         rx_pool->free_map[j] = j;
 454
 455                 memset(rx_pool->rx_buff, 0,
 456                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 457
 458                 atomic_set(&rx_pool->available, 0);
 459                 rx_pool->next_alloc = 0;
 460                 rx_pool->next_free = 0;
 461                 rx_pool->active = 1;
 462         }
 463
 464         return 0;
 465 }
 466
 467 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 468 {
 469         struct ibmvnic_rx_pool *rx_pool;
 470         int i, j;
 471
 472         if (!adapter->rx_pool)
 473                 return;
 474
 475         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 476                 rx_pool = &adapter->rx_pool[i];
 477
 478                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 479
 480                 kfree(rx_pool->free_map);
 481                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 482
 483                 if (!rx_pool->rx_buff)
 484                         continue;
 485
 486                 for (j = 0; j < rx_pool->size; j++) {
 487                         if (rx_pool->rx_buff[j].skb) {
 488                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 489                                 rx_pool->rx_buff[i].skb = NULL;
 490                         }
 491                 }
 492
 493                 kfree(rx_pool->rx_buff);
 494         }
 495
 496         kfree(adapter->rx_pool);
 497         adapter->rx_pool = NULL;
 498         adapter->num_active_rx_pools = 0;
 499 }
 500
 501 static int init_rx_pools(struct net_device *netdev)
 502 {
 503         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 504         struct device *dev = &adapter->vdev->dev;
 505         struct ibmvnic_rx_pool *rx_pool;
 506         int rxadd_subcrqs;
 507         u64 *size_array;
 508         int i, j;
 509
 510         rxadd_subcrqs =
 511                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 512         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 513                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 514
 515         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 516                                    sizeof(struct ibmvnic_rx_pool),
 517                                    GFP_KERNEL);
 518         if (!adapter->rx_pool) {
 519                 dev_err(dev, "Failed to allocate rx pools\n");
 520                 return -1;
 521         }
 522
 523         adapter->num_active_rx_pools = rxadd_subcrqs;
 524
 525         for (i = 0; i < rxadd_subcrqs; i++) {
 526                 rx_pool = &adapter->rx_pool[i];
 527
 528                 netdev_dbg(adapter->netdev,
 529                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 530                            i, adapter->req_rx_add_entries_per_subcrq,
 531                            be64_to_cpu(size_array[i]));
 532
 533                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 534                 rx_pool->index = i;
 535                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 536                 rx_pool->active = 1;
 537
 538                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 539                                             GFP_KERNEL);
 540                 if (!rx_pool->free_map) {
 541                         release_rx_pools(adapter);
 542                         return -1;
 543                 }
 544
 545                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 546                                            sizeof(struct ibmvnic_rx_buff),
 547                                            GFP_KERNEL);
 548                 if (!rx_pool->rx_buff) {
 549                         dev_err(dev, "Couldn't alloc rx buffers\n");
 550                         release_rx_pools(adapter);
 551                         return -1;
 552                 }
 553
 554                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 555                                          rx_pool->size * rx_pool->buff_size)) {
 556                         release_rx_pools(adapter);
 557                         return -1;
 558                 }
 559
 560                 for (j = 0; j < rx_pool->size; ++j)
 561                         rx_pool->free_map[j] = j;
 562
 563                 atomic_set(&rx_pool->available, 0);
 564                 rx_pool->next_alloc = 0;
 565                 rx_pool->next_free = 0;
 566         }
 567
 568         return 0;
 569 }
 570
 571 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
 572                              struct ibmvnic_tx_pool *tx_pool)
 573 {
 574         int rc, i;
 575
 576         rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 577         if (rc)
 578                 return rc;
 579
 580         memset(tx_pool->tx_buff, 0,
 581                tx_pool->num_buffers *
 582                sizeof(struct ibmvnic_tx_buff));
 583
 584         for (i = 0; i < tx_pool->num_buffers; i++)
 585                 tx_pool->free_map[i] = i;
 586
 587         tx_pool->consumer_index = 0;
 588         tx_pool->producer_index = 0;
 589
 590         return 0;
 591 }
 592
 593 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 594 {
 595         int tx_scrqs;
 596         int i, rc;
 597
 598         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 599         for (i = 0; i < tx_scrqs; i++) {
 600                 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
 601                 if (rc)
 602                         return rc;
 603                 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
 604                 if (rc)
 605                         return rc;
 606         }
 607
 608         return 0;
 609 }
 610
 611 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 612 {
 613         if (!adapter->vpd)
 614                 return;
 615
 616         kfree(adapter->vpd->buff);
 617         kfree(adapter->vpd);
 618
 619         adapter->vpd = NULL;
 620 }
 621
 622 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
 623                                 struct ibmvnic_tx_pool *tx_pool)
 624 {
 625         kfree(tx_pool->tx_buff);
 626         kfree(tx_pool->free_map);
 627         free_long_term_buff(adapter, &tx_pool->long_term_buff);
 628 }
 629
 630 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 631 {
 632         int i;
 633
 634         if (!adapter->tx_pool)
 635                 return;
 636
 637         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 638                 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
 639                 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
 640         }
 641
 642         kfree(adapter->tx_pool);
 643         adapter->tx_pool = NULL;
 644         kfree(adapter->tso_pool);
 645         adapter->tso_pool = NULL;
 646         adapter->num_active_tx_pools = 0;
 647 }
 648
 649 static int init_one_tx_pool(struct net_device *netdev,
 650                             struct ibmvnic_tx_pool *tx_pool,
 651                             int num_entries, int buf_size)
 652 {
 653         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 654         int i;
 655
 656         tx_pool->tx_buff = kcalloc(num_entries,
 657                                    sizeof(struct ibmvnic_tx_buff),
 658                                    GFP_KERNEL);
 659         if (!tx_pool->tx_buff)
 660                 return -1;
 661
 662         if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 663                                  num_entries * buf_size))
 664                 return -1;
 665
 666         tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
 667         if (!tx_pool->free_map)
 668                 return -1;
 669
 670         for (i = 0; i < num_entries; i++)
 671                 tx_pool->free_map[i] = i;
 672
 673         tx_pool->consumer_index = 0;
 674         tx_pool->producer_index = 0;
 675         tx_pool->num_buffers = num_entries;
 676         tx_pool->buf_size = buf_size;
 677
 678         return 0;
 679 }
 680
 681 static int init_tx_pools(struct net_device *netdev)
 682 {
 683         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 684         int tx_subcrqs;
 685         int i, rc;
 686
 687         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 688         adapter->tx_pool = kcalloc(tx_subcrqs,
 689                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 690         if (!adapter->tx_pool)
 691                 return -1;
 692
 693         adapter->tso_pool = kcalloc(tx_subcrqs,
 694                                     sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 695         if (!adapter->tso_pool)
 696                 return -1;
 697
 698         adapter->num_active_tx_pools = tx_subcrqs;
 699
 700         for (i = 0; i < tx_subcrqs; i++) {
 701                 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
 702                                       adapter->req_tx_entries_per_subcrq,
 703                                       adapter->req_mtu + VLAN_HLEN);
 704                 if (rc) {
 705                         release_tx_pools(adapter);
 706                         return rc;
 707                 }
 708
 709                 init_one_tx_pool(netdev, &adapter->tso_pool[i],
 710                                  IBMVNIC_TSO_BUFS,
 711                                  IBMVNIC_TSO_BUF_SZ);
 712                 if (rc) {
 713                         release_tx_pools(adapter);
 714                         return rc;
 715                 }
 716         }
 717
 718         return 0;
 719 }
 720
 721 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 722 {
 723         int i;
 724
 725         if (adapter->napi_enabled)
 726                 return;
 727
 728         for (i = 0; i < adapter->req_rx_queues; i++)
 729                 napi_enable(&adapter->napi[i]);
 730
 731         adapter->napi_enabled = true;
 732 }
 733
 734 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 735 {
 736         int i;
 737
 738         if (!adapter->napi_enabled)
 739                 return;
 740
 741         for (i = 0; i < adapter->req_rx_queues; i++) {
 742                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 743                 napi_disable(&adapter->napi[i]);
 744         }
 745
 746         adapter->napi_enabled = false;
 747 }
 748
 749 static int init_napi(struct ibmvnic_adapter *adapter)
 750 {
 751         int i;
 752
 753         adapter->napi = kcalloc(adapter->req_rx_queues,
 754                                 sizeof(struct napi_struct), GFP_KERNEL);
 755         if (!adapter->napi)
 756                 return -ENOMEM;
 757
 758         for (i = 0; i < adapter->req_rx_queues; i++) {
 759                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 760                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 761                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 762         }
 763
 764         adapter->num_active_rx_napi = adapter->req_rx_queues;
 765         return 0;
 766 }
 767
 768 static void release_napi(struct ibmvnic_adapter *adapter)
 769 {
 770         int i;
 771
 772         if (!adapter->napi)
 773                 return;
 774
 775         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 776                 if (&adapter->napi[i]) {
 777                         netdev_dbg(adapter->netdev,
 778                                    "Releasing napi[%d]\n", i);
 779                         netif_napi_del(&adapter->napi[i]);
 780                 }
 781         }
 782
 783         kfree(adapter->napi);
 784         adapter->napi = NULL;
 785         adapter->num_active_rx_napi = 0;
 786         adapter->napi_enabled = false;
 787 }
 788
 789 static int ibmvnic_login(struct net_device *netdev)
 790 {
 791         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 792         unsigned long timeout = msecs_to_jiffies(30000);
 793         int retry_count = 0;
 794         bool retry;
 795         int rc;
 796
 797         do {
 798                 retry = false;
 799                 if (retry_count > IBMVNIC_MAX_QUEUES) {
 800                         netdev_warn(netdev, "Login attempts exceeded\n");
 801                         return -1;
 802                 }
 803
 804                 adapter->init_done_rc = 0;
 805                 reinit_completion(&adapter->init_done);
 806                 rc = send_login(adapter);
 807                 if (rc) {
 808                         netdev_warn(netdev, "Unable to login\n");
 809                         return rc;
 810                 }
 811
 812                 if (!wait_for_completion_timeout(&adapter->init_done,
 813                                                  timeout)) {
 814                         netdev_warn(netdev, "Login timed out\n");
 815                         return -1;
 816                 }
 817
 818                 if (adapter->init_done_rc == PARTIALSUCCESS) {
 819                         retry_count++;
 820                         release_sub_crqs(adapter, 1);
 821
 822                         retry = true;
 823                         netdev_dbg(netdev,
 824                                    "Received partial success, retrying...\n");
 825                         adapter->init_done_rc = 0;
 826                         reinit_completion(&adapter->init_done);
 827                         send_cap_queries(adapter);
 828                         if (!wait_for_completion_timeout(&adapter->init_done,
 829                                                          timeout)) {
 830                                 netdev_warn(netdev,
 831                                             "Capabilities query timed out\n");
 832                                 return -1;
 833                         }
 834
 835                         rc = init_sub_crqs(adapter);
 836                         if (rc) {
 837                                 netdev_warn(netdev,
 838                                             "SCRQ initialization failed\n");
 839                                 return -1;
 840                         }
 841
 842                         rc = init_sub_crq_irqs(adapter);
 843                         if (rc) {
 844                                 netdev_warn(netdev,
 845                                             "SCRQ irq initialization failed\n");
 846                                 return -1;
 847                         }
 848                 } else if (adapter->init_done_rc) {
 849                         netdev_warn(netdev, "Adapter login failed\n");
 850                         return -1;
 851                 }
 852         } while (retry);
 853
 854         /* handle pending MAC address changes after successful login */
 855         if (adapter->mac_change_pending) {
 856                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 857                 adapter->mac_change_pending = false;
 858         }
 859
 860         return 0;
 861 }
 862
 863 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 864 {
 865         kfree(adapter->login_buf);
 866         adapter->login_buf = NULL;
 867 }
 868
 869 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 870 {
 871         kfree(adapter->login_rsp_buf);
 872         adapter->login_rsp_buf = NULL;
 873 }
 874
 875 static void release_resources(struct ibmvnic_adapter *adapter)
 876 {
 877         release_vpd_data(adapter);
 878
 879         release_tx_pools(adapter);
 880         release_rx_pools(adapter);
 881
 882         release_napi(adapter);
 883         release_login_rsp_buffer(adapter);
 884 }
 885
 886 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 887 {
 888         struct net_device *netdev = adapter->netdev;
 889         unsigned long timeout = msecs_to_jiffies(30000);
 890         union ibmvnic_crq crq;
 891         bool resend;
 892         int rc;
 893
 894         netdev_dbg(netdev, "setting link state %d\n", link_state);
 895
 896         memset(&crq, 0, sizeof(crq));
 897         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 898         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 899         crq.logical_link_state.link_state = link_state;
 900
 901         do {
 902                 resend = false;
 903
 904                 reinit_completion(&adapter->init_done);
 905                 rc = ibmvnic_send_crq(adapter, &crq);
 906                 if (rc) {
 907                         netdev_err(netdev, "Failed to set link state\n");
 908                         return rc;
 909                 }
 910
 911                 if (!wait_for_completion_timeout(&adapter->init_done,
 912                                                  timeout)) {
 913                         netdev_err(netdev, "timeout setting link state\n");
 914                         return -1;
 915                 }
 916
 917                 if (adapter->init_done_rc == 1) {
 918                         /* Partuial success, delay and re-send */
 919                         mdelay(1000);
 920                         resend = true;
 921                 } else if (adapter->init_done_rc) {
 922                         netdev_warn(netdev, "Unable to set link state, rc=%d\n",
 923                                     adapter->init_done_rc);
 924                         return adapter->init_done_rc;
 925                 }
 926         } while (resend);
 927
 928         return 0;
 929 }
 930
 931 static int set_real_num_queues(struct net_device *netdev)
 932 {
 933         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 934         int rc;
 935
 936         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 937                    adapter->req_tx_queues, adapter->req_rx_queues);
 938
 939         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 940         if (rc) {
 941                 netdev_err(netdev, "failed to set the number of tx queues\n");
 942                 return rc;
 943         }
 944
 945         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 946         if (rc)
 947                 netdev_err(netdev, "failed to set the number of rx queues\n");
 948
 949         return rc;
 950 }
 951
 952 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 953 {
 954         struct device *dev = &adapter->vdev->dev;
 955         union ibmvnic_crq crq;
 956         int len = 0;
 957         int rc;
 958
 959         if (adapter->vpd->buff)
 960                 len = adapter->vpd->len;
 961
 962         init_completion(&adapter->fw_done);
 963         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 964         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 965         rc = ibmvnic_send_crq(adapter, &crq);
 966         if (rc)
 967                 return rc;
 968         wait_for_completion(&adapter->fw_done);
 969
 970         if (!adapter->vpd->len)
 971                 return -ENODATA;
 972
 973         if (!adapter->vpd->buff)
 974                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 975         else if (adapter->vpd->len != len)
 976                 adapter->vpd->buff =
 977                         krealloc(adapter->vpd->buff,
 978                                  adapter->vpd->len, GFP_KERNEL);
 979
 980         if (!adapter->vpd->buff) {
 981                 dev_err(dev, "Could allocate VPD buffer\n");
 982                 return -ENOMEM;
 983         }
 984
 985         adapter->vpd->dma_addr =
 986                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 987                                DMA_FROM_DEVICE);
 988         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
 989                 dev_err(dev, "Could not map VPD buffer\n");
 990                 kfree(adapter->vpd->buff);
 991                 adapter->vpd->buff = NULL;
 992                 return -ENOMEM;
 993         }
 994
 995         reinit_completion(&adapter->fw_done);
 996         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
 997         crq.get_vpd.cmd = GET_VPD;
 998         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
 999         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1000         rc = ibmvnic_send_crq(adapter, &crq);
1001         if (rc) {
1002                 kfree(adapter->vpd->buff);
1003                 adapter->vpd->buff = NULL;
1004                 return rc;
1005         }
1006         wait_for_completion(&adapter->fw_done);
1007
1008         return 0;
1009 }
1010
1011 static int init_resources(struct ibmvnic_adapter *adapter)
1012 {
1013         struct net_device *netdev = adapter->netdev;
1014         int rc;
1015
1016         rc = set_real_num_queues(netdev);
1017         if (rc)
1018                 return rc;
1019
1020         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1021         if (!adapter->vpd)
1022                 return -ENOMEM;
1023
1024         /* Vital Product Data (VPD) */
1025         rc = ibmvnic_get_vpd(adapter);
1026         if (rc) {
1027                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1028                 return rc;
1029         }
1030
1031         adapter->map_id = 1;
1032
1033         rc = init_napi(adapter);
1034         if (rc)
1035                 return rc;
1036
1037         send_map_query(adapter);
1038
1039         rc = init_rx_pools(netdev);
1040         if (rc)
1041                 return rc;
1042
1043         rc = init_tx_pools(netdev);
1044         return rc;
1045 }
1046
1047 static int __ibmvnic_open(struct net_device *netdev)
1048 {
1049         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1050         enum vnic_state prev_state = adapter->state;
1051         int i, rc;
1052
1053         adapter->state = VNIC_OPENING;
1054         replenish_pools(adapter);
1055         ibmvnic_napi_enable(adapter);
1056
1057         /* We're ready to receive frames, enable the sub-crq interrupts and
1058          * set the logical link state to up
1059          */
1060         for (i = 0; i < adapter->req_rx_queues; i++) {
1061                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1062                 if (prev_state == VNIC_CLOSED)
1063                         enable_irq(adapter->rx_scrq[i]->irq);
1064                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1065         }
1066
1067         for (i = 0; i < adapter->req_tx_queues; i++) {
1068                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1069                 if (prev_state == VNIC_CLOSED)
1070                         enable_irq(adapter->tx_scrq[i]->irq);
1071                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1072         }
1073
1074         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1075         if (rc) {
1076                 for (i = 0; i < adapter->req_rx_queues; i++)
1077                         napi_disable(&adapter->napi[i]);
1078                 release_resources(adapter);
1079                 return rc;
1080         }
1081
1082         netif_tx_start_all_queues(netdev);
1083
1084         if (prev_state == VNIC_CLOSED) {
1085                 for (i = 0; i < adapter->req_rx_queues; i++)
1086                         napi_schedule(&adapter->napi[i]);
1087         }
1088
1089         adapter->state = VNIC_OPEN;
1090         return rc;
1091 }
1092
1093 static int ibmvnic_open(struct net_device *netdev)
1094 {
1095         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1096         int rc;
1097
1098         /* If device failover is pending, just set device state and return.
1099          * Device operation will be handled by reset routine.
1100          */
1101         if (adapter->failover_pending) {
1102                 adapter->state = VNIC_OPEN;
1103                 return 0;
1104         }
1105
1106         mutex_lock(&adapter->reset_lock);
1107
1108         if (adapter->state != VNIC_CLOSED) {
1109                 rc = ibmvnic_login(netdev);
1110                 if (rc) {
1111                         mutex_unlock(&adapter->reset_lock);
1112                         return rc;
1113                 }
1114
1115                 rc = init_resources(adapter);
1116                 if (rc) {
1117                         netdev_err(netdev, "failed to initialize resources\n");
1118                         release_resources(adapter);
1119                         mutex_unlock(&adapter->reset_lock);
1120                         return rc;
1121                 }
1122         }
1123
1124         rc = __ibmvnic_open(netdev);
1125         netif_carrier_on(netdev);
1126
1127         mutex_unlock(&adapter->reset_lock);
1128
1129         return rc;
1130 }
1131
1132 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1133 {
1134         struct ibmvnic_rx_pool *rx_pool;
1135         struct ibmvnic_rx_buff *rx_buff;
1136         u64 rx_entries;
1137         int rx_scrqs;
1138         int i, j;
1139
1140         if (!adapter->rx_pool)
1141                 return;
1142
1143         rx_scrqs = adapter->num_active_rx_pools;
1144         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1145
1146         /* Free any remaining skbs in the rx buffer pools */
1147         for (i = 0; i < rx_scrqs; i++) {
1148                 rx_pool = &adapter->rx_pool[i];
1149                 if (!rx_pool || !rx_pool->rx_buff)
1150                         continue;
1151
1152                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1153                 for (j = 0; j < rx_entries; j++) {
1154                         rx_buff = &rx_pool->rx_buff[j];
1155                         if (rx_buff && rx_buff->skb) {
1156                                 dev_kfree_skb_any(rx_buff->skb);
1157                                 rx_buff->skb = NULL;
1158                         }
1159                 }
1160         }
1161 }
1162
1163 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1164                               struct ibmvnic_tx_pool *tx_pool)
1165 {
1166         struct ibmvnic_tx_buff *tx_buff;
1167         u64 tx_entries;
1168         int i;
1169
1170         if (!tx_pool || !tx_pool->tx_buff)
1171                 return;
1172
1173         tx_entries = tx_pool->num_buffers;
1174
1175         for (i = 0; i < tx_entries; i++) {
1176                 tx_buff = &tx_pool->tx_buff[i];
1177                 if (tx_buff && tx_buff->skb) {
1178                         dev_kfree_skb_any(tx_buff->skb);
1179                         tx_buff->skb = NULL;
1180                 }
1181         }
1182 }
1183
1184 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1185 {
1186         int tx_scrqs;
1187         int i;
1188
1189         if (!adapter->tx_pool || !adapter->tso_pool)
1190                 return;
1191
1192         tx_scrqs = adapter->num_active_tx_pools;
1193
1194         /* Free any remaining skbs in the tx buffer pools */
1195         for (i = 0; i < tx_scrqs; i++) {
1196                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1197                 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1198                 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1199         }
1200 }
1201
1202 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1203 {
1204         struct net_device *netdev = adapter->netdev;
1205         int i;
1206
1207         if (adapter->tx_scrq) {
1208                 for (i = 0; i < adapter->req_tx_queues; i++)
1209                         if (adapter->tx_scrq[i]->irq) {
1210                                 netdev_dbg(netdev,
1211                                            "Disabling tx_scrq[%d] irq\n", i);
1212                                 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1213                                 disable_irq(adapter->tx_scrq[i]->irq);
1214                         }
1215         }
1216
1217         if (adapter->rx_scrq) {
1218                 for (i = 0; i < adapter->req_rx_queues; i++) {
1219                         if (adapter->rx_scrq[i]->irq) {
1220                                 netdev_dbg(netdev,
1221                                            "Disabling rx_scrq[%d] irq\n", i);
1222                                 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1223                                 disable_irq(adapter->rx_scrq[i]->irq);
1224                         }
1225                 }
1226         }
1227 }
1228
1229 static void ibmvnic_cleanup(struct net_device *netdev)
1230 {
1231         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1232
1233         /* ensure that transmissions are stopped if called by do_reset */
1234         if (adapter->resetting)
1235                 netif_tx_disable(netdev);
1236         else
1237                 netif_tx_stop_all_queues(netdev);
1238
1239         ibmvnic_napi_disable(adapter);
1240         ibmvnic_disable_irqs(adapter);
1241
1242         clean_rx_pools(adapter);
1243         clean_tx_pools(adapter);
1244 }
1245
1246 static int __ibmvnic_close(struct net_device *netdev)
1247 {
1248         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1249         int rc = 0;
1250
1251         adapter->state = VNIC_CLOSING;
1252         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1253         if (rc)
1254                 return rc;
1255         adapter->state = VNIC_CLOSED;
1256         return 0;
1257 }
1258
1259 static int ibmvnic_close(struct net_device *netdev)
1260 {
1261         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1262         int rc;
1263
1264         /* If device failover is pending, just set device state and return.
1265          * Device operation will be handled by reset routine.
1266          */
1267         if (adapter->failover_pending) {
1268                 adapter->state = VNIC_CLOSED;
1269                 return 0;
1270         }
1271
1272         mutex_lock(&adapter->reset_lock);
1273         rc = __ibmvnic_close(netdev);
1274         ibmvnic_cleanup(netdev);
1275         mutex_unlock(&adapter->reset_lock);
1276
1277         return rc;
1278 }
1279
1280 /**
1281  * build_hdr_data - creates L2/L3/L4 header data buffer
1282  * @hdr_field - bitfield determining needed headers
1283  * @skb - socket buffer
1284  * @hdr_len - array of header lengths
1285  * @tot_len - total length of data
1286  *
1287  * Reads hdr_field to determine which headers are needed by firmware.
1288  * Builds a buffer containing these headers.  Saves individual header
1289  * lengths and total buffer length to be used to build descriptors.
1290  */
1291 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1292                           int *hdr_len, u8 *hdr_data)
1293 {
1294         int len = 0;
1295         u8 *hdr;
1296
1297         if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1298                 hdr_len[0] = sizeof(struct vlan_ethhdr);
1299         else
1300                 hdr_len[0] = sizeof(struct ethhdr);
1301
1302         if (skb->protocol == htons(ETH_P_IP)) {
1303                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1304                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1305                         hdr_len[2] = tcp_hdrlen(skb);
1306                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1307                         hdr_len[2] = sizeof(struct udphdr);
1308         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1309                 hdr_len[1] = sizeof(struct ipv6hdr);
1310                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1311                         hdr_len[2] = tcp_hdrlen(skb);
1312                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1313                         hdr_len[2] = sizeof(struct udphdr);
1314         } else if (skb->protocol == htons(ETH_P_ARP)) {
1315                 hdr_len[1] = arp_hdr_len(skb->dev);
1316                 hdr_len[2] = 0;
1317         }
1318
1319         memset(hdr_data, 0, 120);
1320         if ((hdr_field >> 6) & 1) {
1321                 hdr = skb_mac_header(skb);
1322                 memcpy(hdr_data, hdr, hdr_len[0]);
1323                 len += hdr_len[0];
1324         }
1325
1326         if ((hdr_field >> 5) & 1) {
1327                 hdr = skb_network_header(skb);
1328                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1329                 len += hdr_len[1];
1330         }
1331
1332         if ((hdr_field >> 4) & 1) {
1333                 hdr = skb_transport_header(skb);
1334                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1335                 len += hdr_len[2];
1336         }
1337         return len;
1338 }
1339
1340 /**
1341  * create_hdr_descs - create header and header extension descriptors
1342  * @hdr_field - bitfield determining needed headers
1343  * @data - buffer containing header data
1344  * @len - length of data buffer
1345  * @hdr_len - array of individual header lengths
1346  * @scrq_arr - descriptor array
1347  *
1348  * Creates header and, if needed, header extension descriptors and
1349  * places them in a descriptor array, scrq_arr
1350  */
1351
1352 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1353                             union sub_crq *scrq_arr)
1354 {
1355         union sub_crq hdr_desc;
1356         int tmp_len = len;
1357         int num_descs = 0;
1358         u8 *data, *cur;
1359         int tmp;
1360
1361         while (tmp_len > 0) {
1362                 cur = hdr_data + len - tmp_len;
1363
1364                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1365                 if (cur != hdr_data) {
1366                         data = hdr_desc.hdr_ext.data;
1367                         tmp = tmp_len > 29 ? 29 : tmp_len;
1368                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1369                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1370                         hdr_desc.hdr_ext.len = tmp;
1371                 } else {
1372                         data = hdr_desc.hdr.data;
1373                         tmp = tmp_len > 24 ? 24 : tmp_len;
1374                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1375                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1376                         hdr_desc.hdr.len = tmp;
1377                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1378                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1379                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1380                         hdr_desc.hdr.flag = hdr_field << 1;
1381                 }
1382                 memcpy(data, cur, tmp);
1383                 tmp_len -= tmp;
1384                 *scrq_arr = hdr_desc;
1385                 scrq_arr++;
1386                 num_descs++;
1387         }
1388
1389         return num_descs;
1390 }
1391
1392 /**
1393  * build_hdr_descs_arr - build a header descriptor array
1394  * @skb - socket buffer
1395  * @num_entries - number of descriptors to be sent
1396  * @subcrq - first TX descriptor
1397  * @hdr_field - bit field determining which headers will be sent
1398  *
1399  * This function will build a TX descriptor array with applicable
1400  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1401  */
1402
1403 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1404                                 int *num_entries, u8 hdr_field)
1405 {
1406         int hdr_len[3] = {0, 0, 0};
1407         int tot_len;
1408         u8 *hdr_data = txbuff->hdr_data;
1409
1410         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1411                                  txbuff->hdr_data);
1412         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1413                          txbuff->indir_arr + 1);
1414 }
1415
1416 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1417                                     struct net_device *netdev)
1418 {
1419         /* For some backing devices, mishandling of small packets
1420          * can result in a loss of connection or TX stall. Device
1421          * architects recommend that no packet should be smaller
1422          * than the minimum MTU value provided to the driver, so
1423          * pad any packets to that length
1424          */
1425         if (skb->len < netdev->min_mtu)
1426                 return skb_put_padto(skb, netdev->min_mtu);
1427
1428         return 0;
1429 }
1430
1431 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1432 {
1433         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1434         int queue_num = skb_get_queue_mapping(skb);
1435         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1436         struct device *dev = &adapter->vdev->dev;
1437         struct ibmvnic_tx_buff *tx_buff = NULL;
1438         struct ibmvnic_sub_crq_queue *tx_scrq;
1439         struct ibmvnic_tx_pool *tx_pool;
1440         unsigned int tx_send_failed = 0;
1441         unsigned int tx_map_failed = 0;
1442         unsigned int tx_dropped = 0;
1443         unsigned int tx_packets = 0;
1444         unsigned int tx_bytes = 0;
1445         dma_addr_t data_dma_addr;
1446         struct netdev_queue *txq;
1447         unsigned long lpar_rc;
1448         union sub_crq tx_crq;
1449         unsigned int offset;
1450         int num_entries = 1;
1451         unsigned char *dst;
1452         u64 *handle_array;
1453         int index = 0;
1454         u8 proto = 0;
1455         int ret = 0;
1456
1457         if (adapter->resetting) {
1458                 if (!netif_subqueue_stopped(netdev, skb))
1459                         netif_stop_subqueue(netdev, queue_num);
1460                 dev_kfree_skb_any(skb);
1461
1462                 tx_send_failed++;
1463                 tx_dropped++;
1464                 ret = NETDEV_TX_OK;
1465                 goto out;
1466         }
1467
1468         if (ibmvnic_xmit_workarounds(skb, netdev)) {
1469                 tx_dropped++;
1470                 tx_send_failed++;
1471                 ret = NETDEV_TX_OK;
1472                 goto out;
1473         }
1474         if (skb_is_gso(skb))
1475                 tx_pool = &adapter->tso_pool[queue_num];
1476         else
1477                 tx_pool = &adapter->tx_pool[queue_num];
1478
1479         tx_scrq = adapter->tx_scrq[queue_num];
1480         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1481         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1482                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1483
1484         index = tx_pool->free_map[tx_pool->consumer_index];
1485
1486         if (index == IBMVNIC_INVALID_MAP) {
1487                 dev_kfree_skb_any(skb);
1488                 tx_send_failed++;
1489                 tx_dropped++;
1490                 ret = NETDEV_TX_OK;
1491                 goto out;
1492         }
1493
1494         tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1495
1496         offset = index * tx_pool->buf_size;
1497         dst = tx_pool->long_term_buff.buff + offset;
1498         memset(dst, 0, tx_pool->buf_size);
1499         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1500
1501         if (skb_shinfo(skb)->nr_frags) {
1502                 int cur, i;
1503
1504                 /* Copy the head */
1505                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1506                 cur = skb_headlen(skb);
1507
1508                 /* Copy the frags */
1509                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1510                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1511
1512                         memcpy(dst + cur,
1513                                page_address(skb_frag_page(frag)) +
1514                                frag->page_offset, skb_frag_size(frag));
1515                         cur += skb_frag_size(frag);
1516                 }
1517         } else {
1518                 skb_copy_from_linear_data(skb, dst, skb->len);
1519         }
1520
1521         tx_pool->consumer_index =
1522             (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1523
1524         tx_buff = &tx_pool->tx_buff[index];
1525         tx_buff->skb = skb;
1526         tx_buff->data_dma[0] = data_dma_addr;
1527         tx_buff->data_len[0] = skb->len;
1528         tx_buff->index = index;
1529         tx_buff->pool_index = queue_num;
1530         tx_buff->last_frag = true;
1531
1532         memset(&tx_crq, 0, sizeof(tx_crq));
1533         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1534         tx_crq.v1.type = IBMVNIC_TX_DESC;
1535         tx_crq.v1.n_crq_elem = 1;
1536         tx_crq.v1.n_sge = 1;
1537         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1538
1539         if (skb_is_gso(skb))
1540                 tx_crq.v1.correlator =
1541                         cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1542         else
1543                 tx_crq.v1.correlator = cpu_to_be32(index);
1544         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1545         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1546         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1547
1548         if (adapter->vlan_header_insertion) {
1549                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1550                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1551         }
1552
1553         if (skb->protocol == htons(ETH_P_IP)) {
1554                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1555                 proto = ip_hdr(skb)->protocol;
1556         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1557                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1558                 proto = ipv6_hdr(skb)->nexthdr;
1559         }
1560
1561         if (proto == IPPROTO_TCP)
1562                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1563         else if (proto == IPPROTO_UDP)
1564                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1565
1566         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1567                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1568                 hdrs += 2;
1569         }
1570         if (skb_is_gso(skb)) {
1571                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1572                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1573                 hdrs += 2;
1574         }
1575         /* determine if l2/3/4 headers are sent to firmware */
1576         if ((*hdrs >> 7) & 1) {
1577                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1578                 tx_crq.v1.n_crq_elem = num_entries;
1579                 tx_buff->num_entries = num_entries;
1580                 tx_buff->indir_arr[0] = tx_crq;
1581                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1582                                                     sizeof(tx_buff->indir_arr),
1583                                                     DMA_TO_DEVICE);
1584                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1585                         dev_kfree_skb_any(skb);
1586                         tx_buff->skb = NULL;
1587                         if (!firmware_has_feature(FW_FEATURE_CMO))
1588                                 dev_err(dev, "tx: unable to map descriptor array\n");
1589                         tx_map_failed++;
1590                         tx_dropped++;
1591                         ret = NETDEV_TX_OK;
1592                         goto tx_err_out;
1593                 }
1594                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1595                                                (u64)tx_buff->indir_dma,
1596                                                (u64)num_entries);
1597         } else {
1598                 tx_buff->num_entries = num_entries;
1599                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1600                                       &tx_crq);
1601         }
1602         if (lpar_rc != H_SUCCESS) {
1603                 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
1604                         dev_err_ratelimited(dev, "tx: send failed\n");
1605                 dev_kfree_skb_any(skb);
1606                 tx_buff->skb = NULL;
1607
1608                 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1609                         /* Disable TX and report carrier off if queue is closed
1610                          * or pending failover.
1611                          * Firmware guarantees that a signal will be sent to the
1612                          * driver, triggering a reset or some other action.
1613                          */
1614                         netif_tx_stop_all_queues(netdev);
1615                         netif_carrier_off(netdev);
1616                 }
1617
1618                 tx_send_failed++;
1619                 tx_dropped++;
1620                 ret = NETDEV_TX_OK;
1621                 goto tx_err_out;
1622         }
1623
1624         if (atomic_add_return(num_entries, &tx_scrq->used)
1625                                         >= adapter->req_tx_entries_per_subcrq) {
1626                 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1627                 netif_stop_subqueue(netdev, queue_num);
1628         }
1629
1630         tx_packets++;
1631         tx_bytes += skb->len;
1632         txq->trans_start = jiffies;
1633         ret = NETDEV_TX_OK;
1634         goto out;
1635
1636 tx_err_out:
1637         /* roll back consumer index and map array*/
1638         if (tx_pool->consumer_index == 0)
1639                 tx_pool->consumer_index =
1640                         tx_pool->num_buffers - 1;
1641         else
1642                 tx_pool->consumer_index--;
1643         tx_pool->free_map[tx_pool->consumer_index] = index;
1644 out:
1645         netdev->stats.tx_dropped += tx_dropped;
1646         netdev->stats.tx_bytes += tx_bytes;
1647         netdev->stats.tx_packets += tx_packets;
1648         adapter->tx_send_failed += tx_send_failed;
1649         adapter->tx_map_failed += tx_map_failed;
1650         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1651         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1652         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1653
1654         return ret;
1655 }
1656
1657 static void ibmvnic_set_multi(struct net_device *netdev)
1658 {
1659         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1660         struct netdev_hw_addr *ha;
1661         union ibmvnic_crq crq;
1662
1663         memset(&crq, 0, sizeof(crq));
1664         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1665         crq.request_capability.cmd = REQUEST_CAPABILITY;
1666
1667         if (netdev->flags & IFF_PROMISC) {
1668                 if (!adapter->promisc_supported)
1669                         return;
1670         } else {
1671                 if (netdev->flags & IFF_ALLMULTI) {
1672                         /* Accept all multicast */
1673                         memset(&crq, 0, sizeof(crq));
1674                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1675                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1676                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1677                         ibmvnic_send_crq(adapter, &crq);
1678                 } else if (netdev_mc_empty(netdev)) {
1679                         /* Reject all multicast */
1680                         memset(&crq, 0, sizeof(crq));
1681                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1682                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1683                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1684                         ibmvnic_send_crq(adapter, &crq);
1685                 } else {
1686                         /* Accept one or more multicast(s) */
1687                         netdev_for_each_mc_addr(ha, netdev) {
1688                                 memset(&crq, 0, sizeof(crq));
1689                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1690                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1691                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1692                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1693                                                 ha->addr);
1694                                 ibmvnic_send_crq(adapter, &crq);
1695                         }
1696                 }
1697         }
1698 }
1699
1700 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1701 {
1702         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1703         struct sockaddr *addr = p;
1704         union ibmvnic_crq crq;
1705         int rc;
1706
1707         if (!is_valid_ether_addr(addr->sa_data))
1708                 return -EADDRNOTAVAIL;
1709
1710         memset(&crq, 0, sizeof(crq));
1711         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1712         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1713         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1714
1715         init_completion(&adapter->fw_done);
1716         rc = ibmvnic_send_crq(adapter, &crq);
1717         if (rc)
1718                 return rc;
1719         wait_for_completion(&adapter->fw_done);
1720         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1721         return adapter->fw_done_rc ? -EIO : 0;
1722 }
1723
1724 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1725 {
1726         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1727         struct sockaddr *addr = p;
1728         int rc;
1729
1730         if (adapter->state == VNIC_PROBED) {
1731                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1732                 adapter->mac_change_pending = true;
1733                 return 0;
1734         }
1735
1736         rc = __ibmvnic_set_mac(netdev, addr);
1737
1738         return rc;
1739 }
1740
1741 /**
1742  * do_reset returns zero if we are able to keep processing reset events, or
1743  * non-zero if we hit a fatal error and must halt.
1744  */
1745 static int do_reset(struct ibmvnic_adapter *adapter,
1746                     struct ibmvnic_rwi *rwi, u32 reset_state)
1747 {
1748         u64 old_num_rx_queues, old_num_tx_queues;
1749         struct net_device *netdev = adapter->netdev;
1750         int i, rc;
1751
1752         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1753                    rwi->reset_reason);
1754
1755         netif_carrier_off(netdev);
1756         adapter->reset_reason = rwi->reset_reason;
1757
1758         old_num_rx_queues = adapter->req_rx_queues;
1759         old_num_tx_queues = adapter->req_tx_queues;
1760
1761         ibmvnic_cleanup(netdev);
1762
1763         if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1764             adapter->reset_reason != VNIC_RESET_FAILOVER) {
1765                 rc = __ibmvnic_close(netdev);
1766                 if (rc)
1767                         return rc;
1768         }
1769
1770         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1771             adapter->wait_for_reset) {
1772                 release_resources(adapter);
1773                 release_sub_crqs(adapter, 1);
1774                 release_crq_queue(adapter);
1775         }
1776
1777         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1778                 /* remove the closed state so when we call open it appears
1779                  * we are coming from the probed state.
1780                  */
1781                 adapter->state = VNIC_PROBED;
1782
1783                 if (adapter->wait_for_reset) {
1784                         rc = init_crq_queue(adapter);
1785                 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1786                         rc = ibmvnic_reenable_crq_queue(adapter);
1787                         release_sub_crqs(adapter, 1);
1788                 } else {
1789                         rc = ibmvnic_reset_crq(adapter);
1790                         if (!rc)
1791                                 rc = vio_enable_interrupts(adapter->vdev);
1792                 }
1793
1794                 if (rc) {
1795                         netdev_err(adapter->netdev,
1796                                    "Couldn't initialize crq. rc=%d\n", rc);
1797                         return rc;
1798                 }
1799
1800                 rc = ibmvnic_reset_init(adapter);
1801                 if (rc)
1802                         return IBMVNIC_INIT_FAILED;
1803
1804                 /* If the adapter was in PROBE state prior to the reset,
1805                  * exit here.
1806                  */
1807                 if (reset_state == VNIC_PROBED)
1808                         return 0;
1809
1810                 rc = ibmvnic_login(netdev);
1811                 if (rc) {
1812                         adapter->state = reset_state;
1813                         return rc;
1814                 }
1815
1816                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1817                     adapter->wait_for_reset) {
1818                         rc = init_resources(adapter);
1819                         if (rc)
1820                                 return rc;
1821                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1822                            adapter->req_tx_queues != old_num_tx_queues) {
1823                         adapter->map_id = 1;
1824                         release_rx_pools(adapter);
1825                         release_tx_pools(adapter);
1826                         init_rx_pools(netdev);
1827                         init_tx_pools(netdev);
1828
1829                         release_napi(adapter);
1830                         init_napi(adapter);
1831                 } else {
1832                         rc = reset_tx_pools(adapter);
1833                         if (rc)
1834                                 return rc;
1835
1836                         rc = reset_rx_pools(adapter);
1837                         if (rc)
1838                                 return rc;
1839                 }
1840                 ibmvnic_disable_irqs(adapter);
1841         }
1842         adapter->state = VNIC_CLOSED;
1843
1844         if (reset_state == VNIC_CLOSED)
1845                 return 0;
1846
1847         rc = __ibmvnic_open(netdev);
1848         if (rc) {
1849                 if (list_empty(&adapter->rwi_list))
1850                         adapter->state = VNIC_CLOSED;
1851                 else
1852                         adapter->state = reset_state;
1853
1854                 return 0;
1855         }
1856
1857         /* kick napi */
1858         for (i = 0; i < adapter->req_rx_queues; i++)
1859                 napi_schedule(&adapter->napi[i]);
1860
1861         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1862             adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1863                 netdev_notify_peers(netdev);
1864
1865         netif_carrier_on(netdev);
1866
1867         return 0;
1868 }
1869
1870 static int do_hard_reset(struct ibmvnic_adapter *adapter,
1871                          struct ibmvnic_rwi *rwi, u32 reset_state)
1872 {
1873         struct net_device *netdev = adapter->netdev;
1874         int rc;
1875
1876         netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
1877                    rwi->reset_reason);
1878
1879         netif_carrier_off(netdev);
1880         adapter->reset_reason = rwi->reset_reason;
1881
1882         ibmvnic_cleanup(netdev);
1883         release_resources(adapter);
1884         release_sub_crqs(adapter, 0);
1885         release_crq_queue(adapter);
1886
1887         /* remove the closed state so when we call open it appears
1888          * we are coming from the probed state.
1889          */
1890         adapter->state = VNIC_PROBED;
1891
1892         rc = init_crq_queue(adapter);
1893         if (rc) {
1894                 netdev_err(adapter->netdev,
1895                            "Couldn't initialize crq. rc=%d\n", rc);
1896                 return rc;
1897         }
1898
1899         rc = ibmvnic_init(adapter);
1900         if (rc)
1901                 return rc;
1902
1903         /* If the adapter was in PROBE state prior to the reset,
1904          * exit here.
1905          */
1906         if (reset_state == VNIC_PROBED)
1907                 return 0;
1908
1909         rc = ibmvnic_login(netdev);
1910         if (rc) {
1911                 adapter->state = VNIC_PROBED;
1912                 return 0;
1913         }
1914         /* netif_set_real_num_xx_queues needs to take rtnl lock here
1915          * unless wait_for_reset is set, in which case the rtnl lock
1916          * has already been taken before initializing the reset
1917          */
1918         if (!adapter->wait_for_reset) {
1919                 rtnl_lock();
1920                 rc = init_resources(adapter);
1921                 rtnl_unlock();
1922         } else {
1923                 rc = init_resources(adapter);
1924         }
1925         if (rc)
1926                 return rc;
1927
1928         ibmvnic_disable_irqs(adapter);
1929         adapter->state = VNIC_CLOSED;
1930
1931         if (reset_state == VNIC_CLOSED)
1932                 return 0;
1933
1934         rc = __ibmvnic_open(netdev);
1935         if (rc) {
1936                 if (list_empty(&adapter->rwi_list))
1937                         adapter->state = VNIC_CLOSED;
1938                 else
1939                         adapter->state = reset_state;
1940
1941                 return 0;
1942         }
1943
1944         netif_carrier_on(netdev);
1945
1946         return 0;
1947 }
1948
1949 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1950 {
1951         struct ibmvnic_rwi *rwi;
1952
1953         mutex_lock(&adapter->rwi_lock);
1954
1955         if (!list_empty(&adapter->rwi_list)) {
1956                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1957                                        list);
1958                 list_del(&rwi->list);
1959         } else {
1960                 rwi = NULL;
1961         }
1962
1963         mutex_unlock(&adapter->rwi_lock);
1964         return rwi;
1965 }
1966
1967 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1968 {
1969         struct ibmvnic_rwi *rwi;
1970
1971         rwi = get_next_rwi(adapter);
1972         while (rwi) {
1973                 kfree(rwi);
1974                 rwi = get_next_rwi(adapter);
1975         }
1976 }
1977
1978 static void __ibmvnic_reset(struct work_struct *work)
1979 {
1980         struct ibmvnic_rwi *rwi;
1981         struct ibmvnic_adapter *adapter;
1982         struct net_device *netdev;
1983         u32 reset_state;
1984         int rc = 0;
1985
1986         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1987         netdev = adapter->netdev;
1988
1989         mutex_lock(&adapter->reset_lock);
1990         reset_state = adapter->state;
1991
1992         rwi = get_next_rwi(adapter);
1993         while (rwi) {
1994                 if (adapter->force_reset_recovery) {
1995                         adapter->force_reset_recovery = false;
1996                         rc = do_hard_reset(adapter, rwi, reset_state);
1997                 } else {
1998                         rc = do_reset(adapter, rwi, reset_state);
1999                 }
2000                 kfree(rwi);
2001                 if (rc && rc != IBMVNIC_INIT_FAILED &&
2002                     !adapter->force_reset_recovery)
2003                         break;
2004
2005                 rwi = get_next_rwi(adapter);
2006         }
2007
2008         if (adapter->wait_for_reset) {
2009                 adapter->wait_for_reset = false;
2010                 adapter->reset_done_rc = rc;
2011                 complete(&adapter->reset_done);
2012         }
2013
2014         if (rc) {
2015                 netdev_dbg(adapter->netdev, "Reset failed\n");
2016                 free_all_rwi(adapter);
2017                 mutex_unlock(&adapter->reset_lock);
2018                 return;
2019         }
2020
2021         adapter->resetting = false;
2022         mutex_unlock(&adapter->reset_lock);
2023 }
2024
2025 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
2026                          enum ibmvnic_reset_reason reason)
2027 {
2028         struct list_head *entry, *tmp_entry;
2029         struct ibmvnic_rwi *rwi, *tmp;
2030         struct net_device *netdev = adapter->netdev;
2031         int ret;
2032
2033         if (adapter->state == VNIC_REMOVING ||
2034             adapter->state == VNIC_REMOVED ||
2035             adapter->failover_pending) {
2036                 ret = EBUSY;
2037                 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
2038                 goto err;
2039         }
2040
2041         if (adapter->state == VNIC_PROBING) {
2042                 netdev_warn(netdev, "Adapter reset during probe\n");
2043                 ret = adapter->init_done_rc = EAGAIN;
2044                 goto err;
2045         }
2046
2047         mutex_lock(&adapter->rwi_lock);
2048
2049         list_for_each(entry, &adapter->rwi_list) {
2050                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
2051                 if (tmp->reset_reason == reason) {
2052                         netdev_dbg(netdev, "Skipping matching reset\n");
2053                         mutex_unlock(&adapter->rwi_lock);
2054                         ret = EBUSY;
2055                         goto err;
2056                 }
2057         }
2058
2059         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
2060         if (!rwi) {
2061                 mutex_unlock(&adapter->rwi_lock);
2062                 ibmvnic_close(netdev);
2063                 ret = ENOMEM;
2064                 goto err;
2065         }
2066         /* if we just received a transport event,
2067          * flush reset queue and process this reset
2068          */
2069         if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
2070                 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
2071                         list_del(entry);
2072         }
2073         rwi->reset_reason = reason;
2074         list_add_tail(&rwi->list, &adapter->rwi_list);
2075         mutex_unlock(&adapter->rwi_lock);
2076         adapter->resetting = true;
2077         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
2078         schedule_work(&adapter->ibmvnic_reset);
2079
2080         return 0;
2081 err:
2082         if (adapter->wait_for_reset)
2083                 adapter->wait_for_reset = false;
2084         return -ret;
2085 }
2086
2087 static void ibmvnic_tx_timeout(struct net_device *dev)
2088 {
2089         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2090
2091         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2092 }
2093
2094 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2095                                   struct ibmvnic_rx_buff *rx_buff)
2096 {
2097         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2098
2099         rx_buff->skb = NULL;
2100
2101         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2102         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2103
2104         atomic_dec(&pool->available);
2105 }
2106
2107 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2108 {
2109         struct net_device *netdev = napi->dev;
2110         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2111         int scrq_num = (int)(napi - adapter->napi);
2112         int frames_processed = 0;
2113
2114 restart_poll:
2115         while (frames_processed < budget) {
2116                 struct sk_buff *skb;
2117                 struct ibmvnic_rx_buff *rx_buff;
2118                 union sub_crq *next;
2119                 u32 length;
2120                 u16 offset;
2121                 u8 flags = 0;
2122
2123                 if (unlikely(adapter->resetting &&
2124                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2125                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2126                         napi_complete_done(napi, frames_processed);
2127                         return frames_processed;
2128                 }
2129
2130                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2131                         break;
2132                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2133                 rx_buff =
2134                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2135                                                           rx_comp.correlator);
2136                 /* do error checking */
2137                 if (next->rx_comp.rc) {
2138                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2139                                    be16_to_cpu(next->rx_comp.rc));
2140                         /* free the entry */
2141                         next->rx_comp.first = 0;
2142                         dev_kfree_skb_any(rx_buff->skb);
2143                         remove_buff_from_pool(adapter, rx_buff);
2144                         continue;
2145                 } else if (!rx_buff->skb) {
2146                         /* free the entry */
2147                         next->rx_comp.first = 0;
2148                         remove_buff_from_pool(adapter, rx_buff);
2149                         continue;
2150                 }
2151
2152                 length = be32_to_cpu(next->rx_comp.len);
2153                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2154                 flags = next->rx_comp.flags;
2155                 skb = rx_buff->skb;
2156                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2157                                         length);
2158
2159                 /* VLAN Header has been stripped by the system firmware and
2160                  * needs to be inserted by the driver
2161                  */
2162                 if (adapter->rx_vlan_header_insertion &&
2163                     (flags & IBMVNIC_VLAN_STRIPPED))
2164                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2165                                                ntohs(next->rx_comp.vlan_tci));
2166
2167                 /* free the entry */
2168                 next->rx_comp.first = 0;
2169                 remove_buff_from_pool(adapter, rx_buff);
2170
2171                 skb_put(skb, length);
2172                 skb->protocol = eth_type_trans(skb, netdev);
2173                 skb_record_rx_queue(skb, scrq_num);
2174
2175                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2176                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2177                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2178                 }
2179
2180                 length = skb->len;
2181                 napi_gro_receive(napi, skb); /* send it up */
2182                 netdev->stats.rx_packets++;
2183                 netdev->stats.rx_bytes += length;
2184                 adapter->rx_stats_buffers[scrq_num].packets++;
2185                 adapter->rx_stats_buffers[scrq_num].bytes += length;
2186                 frames_processed++;
2187         }
2188
2189         if (adapter->state != VNIC_CLOSING)
2190                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2191
2192         if (frames_processed < budget) {
2193                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2194                 napi_complete_done(napi, frames_processed);
2195                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2196                     napi_reschedule(napi)) {
2197                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2198                         goto restart_poll;
2199                 }
2200         }
2201         return frames_processed;
2202 }
2203
2204 #ifdef CONFIG_NET_POLL_CONTROLLER
2205 static void ibmvnic_netpoll_controller(struct net_device *dev)
2206 {
2207         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2208         int i;
2209
2210         replenish_pools(netdev_priv(dev));
2211         for (i = 0; i < adapter->req_rx_queues; i++)
2212                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
2213                                      adapter->rx_scrq[i]);
2214 }
2215 #endif
2216
2217 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2218 {
2219         int rc, ret;
2220
2221         adapter->fallback.mtu = adapter->req_mtu;
2222         adapter->fallback.rx_queues = adapter->req_rx_queues;
2223         adapter->fallback.tx_queues = adapter->req_tx_queues;
2224         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2225         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2226
2227         init_completion(&adapter->reset_done);
2228         adapter->wait_for_reset = true;
2229         rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2230         if (rc)
2231                 return rc;
2232         wait_for_completion(&adapter->reset_done);
2233
2234         ret = 0;
2235         if (adapter->reset_done_rc) {
2236                 ret = -EIO;
2237                 adapter->desired.mtu = adapter->fallback.mtu;
2238                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2239                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2240                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2241                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2242
2243                 init_completion(&adapter->reset_done);
2244                 adapter->wait_for_reset = true;
2245                 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2246                 if (rc)
2247                         return ret;
2248                 wait_for_completion(&adapter->reset_done);
2249         }
2250         adapter->wait_for_reset = false;
2251
2252         return ret;
2253 }
2254
2255 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2256 {
2257         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2258
2259         adapter->desired.mtu = new_mtu + ETH_HLEN;
2260
2261         return wait_for_reset(adapter);
2262 }
2263
2264 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2265                                                 struct net_device *dev,
2266                                                 netdev_features_t features)
2267 {
2268         /* Some backing hardware adapters can not
2269          * handle packets with a MSS less than 224
2270          * or with only one segment.
2271          */
2272         if (skb_is_gso(skb)) {
2273                 if (skb_shinfo(skb)->gso_size < 224 ||
2274                     skb_shinfo(skb)->gso_segs == 1)
2275                         features &= ~NETIF_F_GSO_MASK;
2276         }
2277
2278         return features;
2279 }
2280
2281 static const struct net_device_ops ibmvnic_netdev_ops = {
2282         .ndo_open               = ibmvnic_open,
2283         .ndo_stop               = ibmvnic_close,
2284         .ndo_start_xmit         = ibmvnic_xmit,
2285         .ndo_set_rx_mode        = ibmvnic_set_multi,
2286         .ndo_set_mac_address    = ibmvnic_set_mac,
2287         .ndo_validate_addr      = eth_validate_addr,
2288         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2289 #ifdef CONFIG_NET_POLL_CONTROLLER
2290         .ndo_poll_controller    = ibmvnic_netpoll_controller,
2291 #endif
2292         .ndo_change_mtu         = ibmvnic_change_mtu,
2293         .ndo_features_check     = ibmvnic_features_check,
2294 };
2295
2296 /* ethtool functions */
2297
2298 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2299                                       struct ethtool_link_ksettings *cmd)
2300 {
2301         u32 supported, advertising;
2302
2303         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2304                           SUPPORTED_FIBRE);
2305         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2306                             ADVERTISED_FIBRE);
2307         cmd->base.speed = SPEED_1000;
2308         cmd->base.duplex = DUPLEX_FULL;
2309         cmd->base.port = PORT_FIBRE;
2310         cmd->base.phy_address = 0;
2311         cmd->base.autoneg = AUTONEG_ENABLE;
2312
2313         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2314                                                 supported);
2315         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2316                                                 advertising);
2317
2318         return 0;
2319 }
2320
2321 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2322                                 struct ethtool_drvinfo *info)
2323 {
2324         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2325
2326         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2327         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2328         strlcpy(info->fw_version, adapter->fw_version,
2329                 sizeof(info->fw_version));
2330 }
2331
2332 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2333 {
2334         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2335
2336         return adapter->msg_enable;
2337 }
2338
2339 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2340 {
2341         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2342
2343         adapter->msg_enable = data;
2344 }
2345
2346 static u32 ibmvnic_get_link(struct net_device *netdev)
2347 {
2348         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2349
2350         /* Don't need to send a query because we request a logical link up at
2351          * init and then we wait for link state indications
2352          */
2353         return adapter->logical_link_state;
2354 }
2355
2356 static void ibmvnic_get_ringparam(struct net_device *netdev,
2357                                   struct ethtool_ringparam *ring)
2358 {
2359         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2360
2361         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2362         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2363         ring->rx_mini_max_pending = 0;
2364         ring->rx_jumbo_max_pending = 0;
2365         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2366         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2367         ring->rx_mini_pending = 0;
2368         ring->rx_jumbo_pending = 0;
2369 }
2370
2371 static int ibmvnic_set_ringparam(struct net_device *netdev,
2372                                  struct ethtool_ringparam *ring)
2373 {
2374         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2375
2376         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2377             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2378                 netdev_err(netdev, "Invalid request.\n");
2379                 netdev_err(netdev, "Max tx buffers = %llu\n",
2380                            adapter->max_rx_add_entries_per_subcrq);
2381                 netdev_err(netdev, "Max rx buffers = %llu\n",
2382                            adapter->max_tx_entries_per_subcrq);
2383                 return -EINVAL;
2384         }
2385
2386         adapter->desired.rx_entries = ring->rx_pending;
2387         adapter->desired.tx_entries = ring->tx_pending;
2388
2389         return wait_for_reset(adapter);
2390 }
2391
2392 static void ibmvnic_get_channels(struct net_device *netdev,
2393                                  struct ethtool_channels *channels)
2394 {
2395         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2396
2397         channels->max_rx = adapter->max_rx_queues;
2398         channels->max_tx = adapter->max_tx_queues;
2399         channels->max_other = 0;
2400         channels->max_combined = 0;
2401         channels->rx_count = adapter->req_rx_queues;
2402         channels->tx_count = adapter->req_tx_queues;
2403         channels->other_count = 0;
2404         channels->combined_count = 0;
2405 }
2406
2407 static int ibmvnic_set_channels(struct net_device *netdev,
2408                                 struct ethtool_channels *channels)
2409 {
2410         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2411
2412         adapter->desired.rx_queues = channels->rx_count;
2413         adapter->desired.tx_queues = channels->tx_count;
2414
2415         return wait_for_reset(adapter);
2416 }
2417
2418 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2419 {
2420         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2421         int i;
2422
2423         if (stringset != ETH_SS_STATS)
2424                 return;
2425
2426         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2427                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2428
2429         for (i = 0; i < adapter->req_tx_queues; i++) {
2430                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2431                 data += ETH_GSTRING_LEN;
2432
2433                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2434                 data += ETH_GSTRING_LEN;
2435
2436                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2437                 data += ETH_GSTRING_LEN;
2438         }
2439
2440         for (i = 0; i < adapter->req_rx_queues; i++) {
2441                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2442                 data += ETH_GSTRING_LEN;
2443
2444                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2445                 data += ETH_GSTRING_LEN;
2446
2447                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2448                 data += ETH_GSTRING_LEN;
2449         }
2450 }
2451
2452 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2453 {
2454         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2455
2456         switch (sset) {
2457         case ETH_SS_STATS:
2458                 return ARRAY_SIZE(ibmvnic_stats) +
2459                        adapter->req_tx_queues * NUM_TX_STATS +
2460                        adapter->req_rx_queues * NUM_RX_STATS;
2461         default:
2462                 return -EOPNOTSUPP;
2463         }
2464 }
2465
2466 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2467                                       struct ethtool_stats *stats, u64 *data)
2468 {
2469         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2470         union ibmvnic_crq crq;
2471         int i, j;
2472         int rc;
2473
2474         memset(&crq, 0, sizeof(crq));
2475         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2476         crq.request_statistics.cmd = REQUEST_STATISTICS;
2477         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2478         crq.request_statistics.len =
2479             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2480
2481         /* Wait for data to be written */
2482         init_completion(&adapter->stats_done);
2483         rc = ibmvnic_send_crq(adapter, &crq);
2484         if (rc)
2485                 return;
2486         wait_for_completion(&adapter->stats_done);
2487
2488         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2489                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2490                                                 ibmvnic_stats[i].offset));
2491
2492         for (j = 0; j < adapter->req_tx_queues; j++) {
2493                 data[i] = adapter->tx_stats_buffers[j].packets;
2494                 i++;
2495                 data[i] = adapter->tx_stats_buffers[j].bytes;
2496                 i++;
2497                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2498                 i++;
2499         }
2500
2501         for (j = 0; j < adapter->req_rx_queues; j++) {
2502                 data[i] = adapter->rx_stats_buffers[j].packets;
2503                 i++;
2504                 data[i] = adapter->rx_stats_buffers[j].bytes;
2505                 i++;
2506                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2507                 i++;
2508         }
2509 }
2510
2511 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2512         .get_drvinfo            = ibmvnic_get_drvinfo,
2513         .get_msglevel           = ibmvnic_get_msglevel,
2514         .set_msglevel           = ibmvnic_set_msglevel,
2515         .get_link               = ibmvnic_get_link,
2516         .get_ringparam          = ibmvnic_get_ringparam,
2517         .set_ringparam          = ibmvnic_set_ringparam,
2518         .get_channels           = ibmvnic_get_channels,
2519         .set_channels           = ibmvnic_set_channels,
2520         .get_strings            = ibmvnic_get_strings,
2521         .get_sset_count         = ibmvnic_get_sset_count,
2522         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2523         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2524 };
2525
2526 /* Routines for managing CRQs/sCRQs  */
2527
2528 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2529                                    struct ibmvnic_sub_crq_queue *scrq)
2530 {
2531         int rc;
2532
2533         if (scrq->irq) {
2534                 free_irq(scrq->irq, scrq);
2535                 irq_dispose_mapping(scrq->irq);
2536                 scrq->irq = 0;
2537         }
2538
2539         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2540         atomic_set(&scrq->used, 0);
2541         scrq->cur = 0;
2542
2543         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2544                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2545         return rc;
2546 }
2547
2548 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2549 {
2550         int i, rc;
2551
2552         for (i = 0; i < adapter->req_tx_queues; i++) {
2553                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2554                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2555                 if (rc)
2556                         return rc;
2557         }
2558
2559         for (i = 0; i < adapter->req_rx_queues; i++) {
2560                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2561                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2562                 if (rc)
2563                         return rc;
2564         }
2565
2566         return rc;
2567 }
2568
2569 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2570                                   struct ibmvnic_sub_crq_queue *scrq,
2571                                   bool do_h_free)
2572 {
2573         struct device *dev = &adapter->vdev->dev;
2574         long rc;
2575
2576         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2577
2578         if (do_h_free) {
2579                 /* Close the sub-crqs */
2580                 do {
2581                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2582                                                 adapter->vdev->unit_address,
2583                                                 scrq->crq_num);
2584                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2585
2586                 if (rc) {
2587                         netdev_err(adapter->netdev,
2588                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2589                                    scrq->crq_num, rc);
2590                 }
2591         }
2592
2593         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2594                          DMA_BIDIRECTIONAL);
2595         free_pages((unsigned long)scrq->msgs, 2);
2596         kfree(scrq);
2597 }
2598
2599 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2600                                                         *adapter)
2601 {
2602         struct device *dev = &adapter->vdev->dev;
2603         struct ibmvnic_sub_crq_queue *scrq;
2604         int rc;
2605
2606         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2607         if (!scrq)
2608                 return NULL;
2609
2610         scrq->msgs =
2611                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2612         if (!scrq->msgs) {
2613                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2614                 goto zero_page_failed;
2615         }
2616
2617         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2618                                          DMA_BIDIRECTIONAL);
2619         if (dma_mapping_error(dev, scrq->msg_token)) {
2620                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2621                 goto map_failed;
2622         }
2623
2624         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2625                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2626
2627         if (rc == H_RESOURCE)
2628                 rc = ibmvnic_reset_crq(adapter);
2629
2630         if (rc == H_CLOSED) {
2631                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2632         } else if (rc) {
2633                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2634                 goto reg_failed;
2635         }
2636
2637         scrq->adapter = adapter;
2638         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2639         spin_lock_init(&scrq->lock);
2640
2641         netdev_dbg(adapter->netdev,
2642                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2643                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2644
2645         return scrq;
2646
2647 reg_failed:
2648         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2649                          DMA_BIDIRECTIONAL);
2650 map_failed:
2651         free_pages((unsigned long)scrq->msgs, 2);
2652 zero_page_failed:
2653         kfree(scrq);
2654
2655         return NULL;
2656 }
2657
2658 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2659 {
2660         int i;
2661
2662         if (adapter->tx_scrq) {
2663                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2664                         if (!adapter->tx_scrq[i])
2665                                 continue;
2666
2667                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2668                                    i);
2669                         if (adapter->tx_scrq[i]->irq) {
2670                                 free_irq(adapter->tx_scrq[i]->irq,
2671                                          adapter->tx_scrq[i]);
2672                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2673                                 adapter->tx_scrq[i]->irq = 0;
2674                         }
2675
2676                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2677                                               do_h_free);
2678                 }
2679
2680                 kfree(adapter->tx_scrq);
2681                 adapter->tx_scrq = NULL;
2682                 adapter->num_active_tx_scrqs = 0;
2683         }
2684
2685         if (adapter->rx_scrq) {
2686                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2687                         if (!adapter->rx_scrq[i])
2688                                 continue;
2689
2690                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2691                                    i);
2692                         if (adapter->rx_scrq[i]->irq) {
2693                                 free_irq(adapter->rx_scrq[i]->irq,
2694                                          adapter->rx_scrq[i]);
2695                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2696                                 adapter->rx_scrq[i]->irq = 0;
2697                         }
2698
2699                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2700                                               do_h_free);
2701                 }
2702
2703                 kfree(adapter->rx_scrq);
2704                 adapter->rx_scrq = NULL;
2705                 adapter->num_active_rx_scrqs = 0;
2706         }
2707 }
2708
2709 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2710                             struct ibmvnic_sub_crq_queue *scrq)
2711 {
2712         struct device *dev = &adapter->vdev->dev;
2713         unsigned long rc;
2714
2715         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2716                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2717         if (rc)
2718                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2719                         scrq->hw_irq, rc);
2720         return rc;
2721 }
2722
2723 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2724                            struct ibmvnic_sub_crq_queue *scrq)
2725 {
2726         struct device *dev = &adapter->vdev->dev;
2727         unsigned long rc;
2728
2729         if (scrq->hw_irq > 0x100000000ULL) {
2730                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2731                 return 1;
2732         }
2733
2734         if (adapter->resetting &&
2735             adapter->reset_reason == VNIC_RESET_MOBILITY) {
2736                 u64 val = (0xff000000) | scrq->hw_irq;
2737
2738                 rc = plpar_hcall_norets(H_EOI, val);
2739                 if (rc)
2740                         dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2741                                 val, rc);
2742         }
2743
2744         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2745                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2746         if (rc)
2747                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2748                         scrq->hw_irq, rc);
2749         return rc;
2750 }
2751
2752 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2753                                struct ibmvnic_sub_crq_queue *scrq)
2754 {
2755         struct device *dev = &adapter->vdev->dev;
2756         struct ibmvnic_tx_pool *tx_pool;
2757         struct ibmvnic_tx_buff *txbuff;
2758         union sub_crq *next;
2759         int index;
2760         int i, j;
2761         u8 *first;
2762
2763 restart_loop:
2764         while (pending_scrq(adapter, scrq)) {
2765                 unsigned int pool = scrq->pool_index;
2766                 int num_entries = 0;
2767
2768                 next = ibmvnic_next_scrq(adapter, scrq);
2769                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2770                         if (next->tx_comp.rcs[i]) {
2771                                 dev_err(dev, "tx error %x\n",
2772                                         next->tx_comp.rcs[i]);
2773                                 continue;
2774                         }
2775                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2776                         if (index & IBMVNIC_TSO_POOL_MASK) {
2777                                 tx_pool = &adapter->tso_pool[pool];
2778                                 index &= ~IBMVNIC_TSO_POOL_MASK;
2779                         } else {
2780                                 tx_pool = &adapter->tx_pool[pool];
2781                         }
2782
2783                         txbuff = &tx_pool->tx_buff[index];
2784
2785                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2786                                 if (!txbuff->data_dma[j])
2787                                         continue;
2788
2789                                 txbuff->data_dma[j] = 0;
2790                         }
2791                         /* if sub_crq was sent indirectly */
2792                         first = &txbuff->indir_arr[0].generic.first;
2793                         if (*first == IBMVNIC_CRQ_CMD) {
2794                                 dma_unmap_single(dev, txbuff->indir_dma,
2795                                                  sizeof(txbuff->indir_arr),
2796                                                  DMA_TO_DEVICE);
2797                                 *first = 0;
2798                         }
2799
2800                         if (txbuff->last_frag) {
2801                                 dev_kfree_skb_any(txbuff->skb);
2802                                 txbuff->skb = NULL;
2803                         }
2804
2805                         num_entries += txbuff->num_entries;
2806
2807                         tx_pool->free_map[tx_pool->producer_index] = index;
2808                         tx_pool->producer_index =
2809                                 (tx_pool->producer_index + 1) %
2810                                         tx_pool->num_buffers;
2811                 }
2812                 /* remove tx_comp scrq*/
2813                 next->tx_comp.first = 0;
2814
2815                 if (atomic_sub_return(num_entries, &scrq->used) <=
2816                     (adapter->req_tx_entries_per_subcrq / 2) &&
2817                     __netif_subqueue_stopped(adapter->netdev,
2818                                              scrq->pool_index)) {
2819                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2820                         netdev_dbg(adapter->netdev, "Started queue %d\n",
2821                                    scrq->pool_index);
2822                 }
2823         }
2824
2825         enable_scrq_irq(adapter, scrq);
2826
2827         if (pending_scrq(adapter, scrq)) {
2828                 disable_scrq_irq(adapter, scrq);
2829                 goto restart_loop;
2830         }
2831
2832         return 0;
2833 }
2834
2835 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2836 {
2837         struct ibmvnic_sub_crq_queue *scrq = instance;
2838         struct ibmvnic_adapter *adapter = scrq->adapter;
2839
2840         disable_scrq_irq(adapter, scrq);
2841         ibmvnic_complete_tx(adapter, scrq);
2842
2843         return IRQ_HANDLED;
2844 }
2845
2846 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2847 {
2848         struct ibmvnic_sub_crq_queue *scrq = instance;
2849         struct ibmvnic_adapter *adapter = scrq->adapter;
2850
2851         /* When booting a kdump kernel we can hit pending interrupts
2852          * prior to completing driver initialization.
2853          */
2854         if (unlikely(adapter->state != VNIC_OPEN))
2855                 return IRQ_NONE;
2856
2857         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2858
2859         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2860                 disable_scrq_irq(adapter, scrq);
2861                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2862         }
2863
2864         return IRQ_HANDLED;
2865 }
2866
2867 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2868 {
2869         struct device *dev = &adapter->vdev->dev;
2870         struct ibmvnic_sub_crq_queue *scrq;
2871         int i = 0, j = 0;
2872         int rc = 0;
2873
2874         for (i = 0; i < adapter->req_tx_queues; i++) {
2875                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2876                            i);
2877                 scrq = adapter->tx_scrq[i];
2878                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2879
2880                 if (!scrq->irq) {
2881                         rc = -EINVAL;
2882                         dev_err(dev, "Error mapping irq\n");
2883                         goto req_tx_irq_failed;
2884                 }
2885
2886                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2887                                  0, "ibmvnic_tx", scrq);
2888
2889                 if (rc) {
2890                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2891                                 scrq->irq, rc);
2892                         irq_dispose_mapping(scrq->irq);
2893                         goto req_tx_irq_failed;
2894                 }
2895         }
2896
2897         for (i = 0; i < adapter->req_rx_queues; i++) {
2898                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2899                            i);
2900                 scrq = adapter->rx_scrq[i];
2901                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2902                 if (!scrq->irq) {
2903                         rc = -EINVAL;
2904                         dev_err(dev, "Error mapping irq\n");
2905                         goto req_rx_irq_failed;
2906                 }
2907                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2908                                  0, "ibmvnic_rx", scrq);
2909                 if (rc) {
2910                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2911                                 scrq->irq, rc);
2912                         irq_dispose_mapping(scrq->irq);
2913                         goto req_rx_irq_failed;
2914                 }
2915         }
2916         return rc;
2917
2918 req_rx_irq_failed:
2919         for (j = 0; j < i; j++) {
2920                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2921                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2922         }
2923         i = adapter->req_tx_queues;
2924 req_tx_irq_failed:
2925         for (j = 0; j < i; j++) {
2926                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2927                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2928         }
2929         release_sub_crqs(adapter, 1);
2930         return rc;
2931 }
2932
2933 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2934 {
2935         struct device *dev = &adapter->vdev->dev;
2936         struct ibmvnic_sub_crq_queue **allqueues;
2937         int registered_queues = 0;
2938         int total_queues;
2939         int more = 0;
2940         int i;
2941
2942         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2943
2944         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2945         if (!allqueues)
2946                 return -1;
2947
2948         for (i = 0; i < total_queues; i++) {
2949                 allqueues[i] = init_sub_crq_queue(adapter);
2950                 if (!allqueues[i]) {
2951                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2952                         break;
2953                 }
2954                 registered_queues++;
2955         }
2956
2957         /* Make sure we were able to register the minimum number of queues */
2958         if (registered_queues <
2959             adapter->min_tx_queues + adapter->min_rx_queues) {
2960                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2961                 goto tx_failed;
2962         }
2963
2964         /* Distribute the failed allocated queues*/
2965         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2966                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2967                 switch (i % 3) {
2968                 case 0:
2969                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2970                                 adapter->req_rx_queues--;
2971                         else
2972                                 more++;
2973                         break;
2974                 case 1:
2975                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2976                                 adapter->req_tx_queues--;
2977                         else
2978                                 more++;
2979                         break;
2980                 }
2981         }
2982
2983         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2984                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2985         if (!adapter->tx_scrq)
2986                 goto tx_failed;
2987
2988         for (i = 0; i < adapter->req_tx_queues; i++) {
2989                 adapter->tx_scrq[i] = allqueues[i];
2990                 adapter->tx_scrq[i]->pool_index = i;
2991                 adapter->num_active_tx_scrqs++;
2992         }
2993
2994         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2995                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2996         if (!adapter->rx_scrq)
2997                 goto rx_failed;
2998
2999         for (i = 0; i < adapter->req_rx_queues; i++) {
3000                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
3001                 adapter->rx_scrq[i]->scrq_num = i;
3002                 adapter->num_active_rx_scrqs++;
3003         }
3004
3005         kfree(allqueues);
3006         return 0;
3007
3008 rx_failed:
3009         kfree(adapter->tx_scrq);
3010         adapter->tx_scrq = NULL;
3011 tx_failed:
3012         for (i = 0; i < registered_queues; i++)
3013                 release_sub_crq_queue(adapter, allqueues[i], 1);
3014         kfree(allqueues);
3015         return -1;
3016 }
3017
3018 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
3019 {
3020         struct device *dev = &adapter->vdev->dev;
3021         union ibmvnic_crq crq;
3022         int max_entries;
3023
3024         if (!retry) {
3025                 /* Sub-CRQ entries are 32 byte long */
3026                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
3027
3028                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
3029                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
3030                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
3031                         return;
3032                 }
3033
3034                 if (adapter->desired.mtu)
3035                         adapter->req_mtu = adapter->desired.mtu;
3036                 else
3037                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
3038
3039                 if (!adapter->desired.tx_entries)
3040                         adapter->desired.tx_entries =
3041                                         adapter->max_tx_entries_per_subcrq;
3042                 if (!adapter->desired.rx_entries)
3043                         adapter->desired.rx_entries =
3044                                         adapter->max_rx_add_entries_per_subcrq;
3045
3046                 max_entries = IBMVNIC_MAX_LTB_SIZE /
3047                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
3048
3049                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3050                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
3051                         adapter->desired.tx_entries = max_entries;
3052                 }
3053
3054                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
3055                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
3056                         adapter->desired.rx_entries = max_entries;
3057                 }
3058
3059                 if (adapter->desired.tx_entries)
3060                         adapter->req_tx_entries_per_subcrq =
3061                                         adapter->desired.tx_entries;
3062                 else
3063                         adapter->req_tx_entries_per_subcrq =
3064                                         adapter->max_tx_entries_per_subcrq;
3065
3066                 if (adapter->desired.rx_entries)
3067                         adapter->req_rx_add_entries_per_subcrq =
3068                                         adapter->desired.rx_entries;
3069                 else
3070                         adapter->req_rx_add_entries_per_subcrq =
3071                                         adapter->max_rx_add_entries_per_subcrq;
3072
3073                 if (adapter->desired.tx_queues)
3074                         adapter->req_tx_queues =
3075                                         adapter->desired.tx_queues;
3076                 else
3077                         adapter->req_tx_queues =
3078                                         adapter->opt_tx_comp_sub_queues;
3079
3080                 if (adapter->desired.rx_queues)
3081                         adapter->req_rx_queues =
3082                                         adapter->desired.rx_queues;
3083                 else
3084                         adapter->req_rx_queues =
3085                                         adapter->opt_rx_comp_queues;
3086
3087                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3088         }
3089
3090         memset(&crq, 0, sizeof(crq));
3091         crq.request_capability.first = IBMVNIC_CRQ_CMD;
3092         crq.request_capability.cmd = REQUEST_CAPABILITY;
3093
3094         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3095         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3096         atomic_inc(&adapter->running_cap_crqs);
3097         ibmvnic_send_crq(adapter, &crq);
3098
3099         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3100         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3101         atomic_inc(&adapter->running_cap_crqs);
3102         ibmvnic_send_crq(adapter, &crq);
3103
3104         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3105         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3106         atomic_inc(&adapter->running_cap_crqs);
3107         ibmvnic_send_crq(adapter, &crq);
3108
3109         crq.request_capability.capability =
3110             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3111         crq.request_capability.number =
3112             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3113         atomic_inc(&adapter->running_cap_crqs);
3114         ibmvnic_send_crq(adapter, &crq);
3115
3116         crq.request_capability.capability =
3117             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3118         crq.request_capability.number =
3119             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3120         atomic_inc(&adapter->running_cap_crqs);
3121         ibmvnic_send_crq(adapter, &crq);
3122
3123         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3124         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3125         atomic_inc(&adapter->running_cap_crqs);
3126         ibmvnic_send_crq(adapter, &crq);
3127
3128         if (adapter->netdev->flags & IFF_PROMISC) {
3129                 if (adapter->promisc_supported) {
3130                         crq.request_capability.capability =
3131                             cpu_to_be16(PROMISC_REQUESTED);
3132                         crq.request_capability.number = cpu_to_be64(1);
3133                         atomic_inc(&adapter->running_cap_crqs);
3134                         ibmvnic_send_crq(adapter, &crq);
3135                 }
3136         } else {
3137                 crq.request_capability.capability =
3138                     cpu_to_be16(PROMISC_REQUESTED);
3139                 crq.request_capability.number = cpu_to_be64(0);
3140                 atomic_inc(&adapter->running_cap_crqs);
3141                 ibmvnic_send_crq(adapter, &crq);
3142         }
3143 }
3144
3145 static int pending_scrq(struct ibmvnic_adapter *adapter,
3146                         struct ibmvnic_sub_crq_queue *scrq)
3147 {
3148         union sub_crq *entry = &scrq->msgs[scrq->cur];
3149
3150         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3151                 return 1;
3152         else
3153                 return 0;
3154 }
3155
3156 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3157                                         struct ibmvnic_sub_crq_queue *scrq)
3158 {
3159         union sub_crq *entry;
3160         unsigned long flags;
3161
3162         spin_lock_irqsave(&scrq->lock, flags);
3163         entry = &scrq->msgs[scrq->cur];
3164         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3165                 if (++scrq->cur == scrq->size)
3166                         scrq->cur = 0;
3167         } else {
3168                 entry = NULL;
3169         }
3170         spin_unlock_irqrestore(&scrq->lock, flags);
3171
3172         return entry;
3173 }
3174
3175 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3176 {
3177         struct ibmvnic_crq_queue *queue = &adapter->crq;
3178         union ibmvnic_crq *crq;
3179
3180         crq = &queue->msgs[queue->cur];
3181         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3182                 if (++queue->cur == queue->size)
3183                         queue->cur = 0;
3184         } else {
3185                 crq = NULL;
3186         }
3187
3188         return crq;
3189 }
3190
3191 static void print_subcrq_error(struct device *dev, int rc, const char *func)
3192 {
3193         switch (rc) {
3194         case H_PARAMETER:
3195                 dev_warn_ratelimited(dev,
3196                                      "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
3197                                      func, rc);
3198                 break;
3199         case H_CLOSED:
3200                 dev_warn_ratelimited(dev,
3201                                      "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
3202                                      func, rc);
3203                 break;
3204         default:
3205                 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
3206                 break;
3207         }
3208 }
3209
3210 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3211                        union sub_crq *sub_crq)
3212 {
3213         unsigned int ua = adapter->vdev->unit_address;
3214         struct device *dev = &adapter->vdev->dev;
3215         u64 *u64_crq = (u64 *)sub_crq;
3216         int rc;
3217
3218         netdev_dbg(adapter->netdev,
3219                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3220                    (unsigned long int)cpu_to_be64(remote_handle),
3221                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3222                    (unsigned long int)cpu_to_be64(u64_crq[1]),
3223                    (unsigned long int)cpu_to_be64(u64_crq[2]),
3224                    (unsigned long int)cpu_to_be64(u64_crq[3]));
3225
3226         /* Make sure the hypervisor sees the complete request */
3227         mb();
3228
3229         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3230                                 cpu_to_be64(remote_handle),
3231                                 cpu_to_be64(u64_crq[0]),
3232                                 cpu_to_be64(u64_crq[1]),
3233                                 cpu_to_be64(u64_crq[2]),
3234                                 cpu_to_be64(u64_crq[3]));
3235
3236         if (rc)
3237                 print_subcrq_error(dev, rc, __func__);
3238
3239         return rc;
3240 }
3241
3242 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3243                                 u64 remote_handle, u64 ioba, u64 num_entries)
3244 {
3245         unsigned int ua = adapter->vdev->unit_address;
3246         struct device *dev = &adapter->vdev->dev;
3247         int rc;
3248
3249         /* Make sure the hypervisor sees the complete request */
3250         mb();
3251         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3252                                 cpu_to_be64(remote_handle),
3253                                 ioba, num_entries);
3254
3255         if (rc)
3256                 print_subcrq_error(dev, rc, __func__);
3257
3258         return rc;
3259 }
3260
3261 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3262                             union ibmvnic_crq *crq)
3263 {
3264         unsigned int ua = adapter->vdev->unit_address;
3265         struct device *dev = &adapter->vdev->dev;
3266         u64 *u64_crq = (u64 *)crq;
3267         int rc;
3268
3269         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3270                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3271                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3272
3273         if (!adapter->crq.active &&
3274             crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3275                 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3276                 return -EINVAL;
3277         }
3278
3279         /* Make sure the hypervisor sees the complete request */
3280         mb();
3281
3282         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3283                                 cpu_to_be64(u64_crq[0]),
3284                                 cpu_to_be64(u64_crq[1]));
3285
3286         if (rc) {
3287                 if (rc == H_CLOSED) {
3288                         dev_warn(dev, "CRQ Queue closed\n");
3289                         if (adapter->resetting)
3290                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3291                 }
3292
3293                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3294         }
3295
3296         return rc;
3297 }
3298
3299 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3300 {
3301         union ibmvnic_crq crq;
3302
3303         memset(&crq, 0, sizeof(crq));
3304         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3305         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3306         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3307
3308         return ibmvnic_send_crq(adapter, &crq);
3309 }
3310
3311 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3312 {
3313         union ibmvnic_crq crq;
3314
3315         memset(&crq, 0, sizeof(crq));
3316         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3317         crq.version_exchange.cmd = VERSION_EXCHANGE;
3318         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3319
3320         return ibmvnic_send_crq(adapter, &crq);
3321 }
3322
3323 struct vnic_login_client_data {
3324         u8      type;
3325         __be16  len;
3326         char    name[];
3327 } __packed;
3328
3329 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3330 {
3331         int len;
3332
3333         /* Calculate the amount of buffer space needed for the
3334          * vnic client data in the login buffer. There are four entries,
3335          * OS name, LPAR name, device name, and a null last entry.
3336          */
3337         len = 4 * sizeof(struct vnic_login_client_data);
3338         len += 6; /* "Linux" plus NULL */
3339         len += strlen(utsname()->nodename) + 1;
3340         len += strlen(adapter->netdev->name) + 1;
3341
3342         return len;
3343 }
3344
3345 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3346                                  struct vnic_login_client_data *vlcd)
3347 {
3348         const char *os_name = "Linux";
3349         int len;
3350
3351         /* Type 1 - LPAR OS */
3352         vlcd->type = 1;
3353         len = strlen(os_name) + 1;
3354         vlcd->len = cpu_to_be16(len);
3355         strncpy(vlcd->name, os_name, len);
3356         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3357
3358         /* Type 2 - LPAR name */
3359         vlcd->type = 2;
3360         len = strlen(utsname()->nodename) + 1;
3361         vlcd->len = cpu_to_be16(len);
3362         strncpy(vlcd->name, utsname()->nodename, len);
3363         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3364
3365         /* Type 3 - device name */
3366         vlcd->type = 3;
3367         len = strlen(adapter->netdev->name) + 1;
3368         vlcd->len = cpu_to_be16(len);
3369         strncpy(vlcd->name, adapter->netdev->name, len);
3370 }
3371
3372 static int send_login(struct ibmvnic_adapter *adapter)
3373 {
3374         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3375         struct ibmvnic_login_buffer *login_buffer;
3376         struct device *dev = &adapter->vdev->dev;
3377         dma_addr_t rsp_buffer_token;
3378         dma_addr_t buffer_token;
3379         size_t rsp_buffer_size;
3380         union ibmvnic_crq crq;
3381         size_t buffer_size;
3382         __be64 *tx_list_p;
3383         __be64 *rx_list_p;
3384         int client_data_len;
3385         struct vnic_login_client_data *vlcd;
3386         int i;
3387
3388         if (!adapter->tx_scrq || !adapter->rx_scrq) {
3389                 netdev_err(adapter->netdev,
3390                            "RX or TX queues are not allocated, device login failed\n");
3391                 return -1;
3392         }
3393
3394         release_login_rsp_buffer(adapter);
3395         client_data_len = vnic_client_data_len(adapter);
3396
3397         buffer_size =
3398             sizeof(struct ibmvnic_login_buffer) +
3399             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3400             client_data_len;
3401
3402         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3403         if (!login_buffer)
3404                 goto buf_alloc_failed;
3405
3406         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3407                                       DMA_TO_DEVICE);
3408         if (dma_mapping_error(dev, buffer_token)) {
3409                 dev_err(dev, "Couldn't map login buffer\n");
3410                 goto buf_map_failed;
3411         }
3412
3413         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3414                           sizeof(u64) * adapter->req_tx_queues +
3415                           sizeof(u64) * adapter->req_rx_queues +
3416                           sizeof(u64) * adapter->req_rx_queues +
3417                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3418
3419         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3420         if (!login_rsp_buffer)
3421                 goto buf_rsp_alloc_failed;
3422
3423         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3424                                           rsp_buffer_size, DMA_FROM_DEVICE);
3425         if (dma_mapping_error(dev, rsp_buffer_token)) {
3426                 dev_err(dev, "Couldn't map login rsp buffer\n");
3427                 goto buf_rsp_map_failed;
3428         }
3429
3430         adapter->login_buf = login_buffer;
3431         adapter->login_buf_token = buffer_token;
3432         adapter->login_buf_sz = buffer_size;
3433         adapter->login_rsp_buf = login_rsp_buffer;
3434         adapter->login_rsp_buf_token = rsp_buffer_token;
3435         adapter->login_rsp_buf_sz = rsp_buffer_size;
3436
3437         login_buffer->len = cpu_to_be32(buffer_size);
3438         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3439         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3440         login_buffer->off_txcomp_subcrqs =
3441             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3442         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3443         login_buffer->off_rxcomp_subcrqs =
3444             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3445                         sizeof(u64) * adapter->req_tx_queues);
3446         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3447         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3448
3449         tx_list_p = (__be64 *)((char *)login_buffer +
3450                                       sizeof(struct ibmvnic_login_buffer));
3451         rx_list_p = (__be64 *)((char *)login_buffer +
3452                                       sizeof(struct ibmvnic_login_buffer) +
3453                                       sizeof(u64) * adapter->req_tx_queues);
3454
3455         for (i = 0; i < adapter->req_tx_queues; i++) {
3456                 if (adapter->tx_scrq[i]) {
3457                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3458                                                    crq_num);
3459                 }
3460         }
3461
3462         for (i = 0; i < adapter->req_rx_queues; i++) {
3463                 if (adapter->rx_scrq[i]) {
3464                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3465                                                    crq_num);
3466                 }
3467         }
3468
3469         /* Insert vNIC login client data */
3470         vlcd = (struct vnic_login_client_data *)
3471                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3472         login_buffer->client_data_offset =
3473                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3474         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3475
3476         vnic_add_client_data(adapter, vlcd);
3477
3478         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3479         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3480                 netdev_dbg(adapter->netdev, "%016lx\n",
3481                            ((unsigned long int *)(adapter->login_buf))[i]);
3482         }
3483
3484         memset(&crq, 0, sizeof(crq));
3485         crq.login.first = IBMVNIC_CRQ_CMD;
3486         crq.login.cmd = LOGIN;
3487         crq.login.ioba = cpu_to_be32(buffer_token);
3488         crq.login.len = cpu_to_be32(buffer_size);
3489         ibmvnic_send_crq(adapter, &crq);
3490
3491         return 0;
3492
3493 buf_rsp_map_failed:
3494         kfree(login_rsp_buffer);
3495 buf_rsp_alloc_failed:
3496         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3497 buf_map_failed:
3498         kfree(login_buffer);
3499 buf_alloc_failed:
3500         return -1;
3501 }
3502
3503 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3504                             u32 len, u8 map_id)
3505 {
3506         union ibmvnic_crq crq;
3507
3508         memset(&crq, 0, sizeof(crq));
3509         crq.request_map.first = IBMVNIC_CRQ_CMD;
3510         crq.request_map.cmd = REQUEST_MAP;
3511         crq.request_map.map_id = map_id;
3512         crq.request_map.ioba = cpu_to_be32(addr);
3513         crq.request_map.len = cpu_to_be32(len);
3514         return ibmvnic_send_crq(adapter, &crq);
3515 }
3516
3517 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3518 {
3519         union ibmvnic_crq crq;
3520
3521         memset(&crq, 0, sizeof(crq));
3522         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3523         crq.request_unmap.cmd = REQUEST_UNMAP;
3524         crq.request_unmap.map_id = map_id;
3525         return ibmvnic_send_crq(adapter, &crq);
3526 }
3527
3528 static void send_map_query(struct ibmvnic_adapter *adapter)
3529 {
3530         union ibmvnic_crq crq;
3531
3532         memset(&crq, 0, sizeof(crq));
3533         crq.query_map.first = IBMVNIC_CRQ_CMD;
3534         crq.query_map.cmd = QUERY_MAP;
3535         ibmvnic_send_crq(adapter, &crq);
3536 }
3537
3538 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3539 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3540 {
3541         union ibmvnic_crq crq;
3542
3543         atomic_set(&adapter->running_cap_crqs, 0);
3544         memset(&crq, 0, sizeof(crq));
3545         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3546         crq.query_capability.cmd = QUERY_CAPABILITY;
3547
3548         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3549         atomic_inc(&adapter->running_cap_crqs);
3550         ibmvnic_send_crq(adapter, &crq);
3551
3552         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3553         atomic_inc(&adapter->running_cap_crqs);
3554         ibmvnic_send_crq(adapter, &crq);
3555
3556         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3557         atomic_inc(&adapter->running_cap_crqs);
3558         ibmvnic_send_crq(adapter, &crq);
3559
3560         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3561         atomic_inc(&adapter->running_cap_crqs);
3562         ibmvnic_send_crq(adapter, &crq);
3563
3564         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3565         atomic_inc(&adapter->running_cap_crqs);
3566         ibmvnic_send_crq(adapter, &crq);
3567
3568         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3569         atomic_inc(&adapter->running_cap_crqs);
3570         ibmvnic_send_crq(adapter, &crq);
3571
3572         crq.query_capability.capability =
3573             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3574         atomic_inc(&adapter->running_cap_crqs);
3575         ibmvnic_send_crq(adapter, &crq);
3576
3577         crq.query_capability.capability =
3578             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3579         atomic_inc(&adapter->running_cap_crqs);
3580         ibmvnic_send_crq(adapter, &crq);
3581
3582         crq.query_capability.capability =
3583             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3584         atomic_inc(&adapter->running_cap_crqs);
3585         ibmvnic_send_crq(adapter, &crq);
3586
3587         crq.query_capability.capability =
3588             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3589         atomic_inc(&adapter->running_cap_crqs);
3590         ibmvnic_send_crq(adapter, &crq);
3591
3592         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3593         atomic_inc(&adapter->running_cap_crqs);
3594         ibmvnic_send_crq(adapter, &crq);
3595
3596         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3597         atomic_inc(&adapter->running_cap_crqs);
3598         ibmvnic_send_crq(adapter, &crq);
3599
3600         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3601         atomic_inc(&adapter->running_cap_crqs);
3602         ibmvnic_send_crq(adapter, &crq);
3603
3604         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3605         atomic_inc(&adapter->running_cap_crqs);
3606         ibmvnic_send_crq(adapter, &crq);
3607
3608         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3609         atomic_inc(&adapter->running_cap_crqs);
3610         ibmvnic_send_crq(adapter, &crq);
3611
3612         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3613         atomic_inc(&adapter->running_cap_crqs);
3614         ibmvnic_send_crq(adapter, &crq);
3615
3616         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3617         atomic_inc(&adapter->running_cap_crqs);
3618         ibmvnic_send_crq(adapter, &crq);
3619
3620         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3621         atomic_inc(&adapter->running_cap_crqs);
3622         ibmvnic_send_crq(adapter, &crq);
3623
3624         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3625         atomic_inc(&adapter->running_cap_crqs);
3626         ibmvnic_send_crq(adapter, &crq);
3627
3628         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3629         atomic_inc(&adapter->running_cap_crqs);
3630         ibmvnic_send_crq(adapter, &crq);
3631
3632         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3633         atomic_inc(&adapter->running_cap_crqs);
3634         ibmvnic_send_crq(adapter, &crq);
3635
3636         crq.query_capability.capability =
3637                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3638         atomic_inc(&adapter->running_cap_crqs);
3639         ibmvnic_send_crq(adapter, &crq);
3640
3641         crq.query_capability.capability =
3642                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3643         atomic_inc(&adapter->running_cap_crqs);
3644         ibmvnic_send_crq(adapter, &crq);
3645
3646         crq.query_capability.capability =
3647                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3648         atomic_inc(&adapter->running_cap_crqs);
3649         ibmvnic_send_crq(adapter, &crq);
3650
3651         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3652         atomic_inc(&adapter->running_cap_crqs);
3653         ibmvnic_send_crq(adapter, &crq);
3654 }
3655
3656 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3657                                 struct ibmvnic_adapter *adapter)
3658 {
3659         struct device *dev = &adapter->vdev->dev;
3660
3661         if (crq->get_vpd_size_rsp.rc.code) {
3662                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3663                         crq->get_vpd_size_rsp.rc.code);
3664                 complete(&adapter->fw_done);
3665                 return;
3666         }
3667
3668         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3669         complete(&adapter->fw_done);
3670 }
3671
3672 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3673                            struct ibmvnic_adapter *adapter)
3674 {
3675         struct device *dev = &adapter->vdev->dev;
3676         unsigned char *substr = NULL;
3677         u8 fw_level_len = 0;
3678
3679         memset(adapter->fw_version, 0, 32);
3680
3681         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3682                          DMA_FROM_DEVICE);
3683
3684         if (crq->get_vpd_rsp.rc.code) {
3685                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3686                         crq->get_vpd_rsp.rc.code);
3687                 goto complete;
3688         }
3689
3690         /* get the position of the firmware version info
3691          * located after the ASCII 'RM' substring in the buffer
3692          */
3693         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3694         if (!substr) {
3695                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3696                 goto complete;
3697         }
3698
3699         /* get length of firmware level ASCII substring */
3700         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3701                 fw_level_len = *(substr + 2);
3702         } else {
3703                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3704                 goto complete;
3705         }
3706
3707         /* copy firmware version string from vpd into adapter */
3708         if ((substr + 3 + fw_level_len) <
3709             (adapter->vpd->buff + adapter->vpd->len)) {
3710                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3711         } else {
3712                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3713         }
3714
3715 complete:
3716         if (adapter->fw_version[0] == '\0')
3717                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3718         complete(&adapter->fw_done);
3719 }
3720
3721 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3722 {
3723         struct device *dev = &adapter->vdev->dev;
3724         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3725         union ibmvnic_crq crq;
3726         int i;
3727
3728         dma_unmap_single(dev, adapter->ip_offload_tok,
3729                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3730
3731         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3732         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3733                 netdev_dbg(adapter->netdev, "%016lx\n",
3734                            ((unsigned long int *)(buf))[i]);
3735
3736         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3737         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3738         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3739                    buf->tcp_ipv4_chksum);
3740         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3741                    buf->tcp_ipv6_chksum);
3742         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3743                    buf->udp_ipv4_chksum);
3744         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3745                    buf->udp_ipv6_chksum);
3746         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3747                    buf->large_tx_ipv4);
3748         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3749                    buf->large_tx_ipv6);
3750         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3751                    buf->large_rx_ipv4);
3752         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3753                    buf->large_rx_ipv6);
3754         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3755                    buf->max_ipv4_header_size);
3756         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3757                    buf->max_ipv6_header_size);
3758         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3759                    buf->max_tcp_header_size);
3760         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3761                    buf->max_udp_header_size);
3762         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3763                    buf->max_large_tx_size);
3764         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3765                    buf->max_large_rx_size);
3766         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3767                    buf->ipv6_extension_header);
3768         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3769                    buf->tcp_pseudosum_req);
3770         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3771                    buf->num_ipv6_ext_headers);
3772         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3773                    buf->off_ipv6_ext_headers);
3774
3775         adapter->ip_offload_ctrl_tok =
3776             dma_map_single(dev, &adapter->ip_offload_ctrl,
3777                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3778
3779         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3780                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3781                 return;
3782         }
3783
3784         adapter->ip_offload_ctrl.len =
3785             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3786         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3787         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3788         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3789         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3790         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3791         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3792         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3793         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3794         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3795
3796         /* large_rx disabled for now, additional features needed */
3797         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3798         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3799
3800         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3801
3802         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3803                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3804
3805         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3806                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3807
3808         if ((adapter->netdev->features &
3809             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3810                 adapter->netdev->features |= NETIF_F_RXCSUM;
3811
3812         if (buf->large_tx_ipv4)
3813                 adapter->netdev->features |= NETIF_F_TSO;
3814         if (buf->large_tx_ipv6)
3815                 adapter->netdev->features |= NETIF_F_TSO6;
3816
3817         adapter->netdev->hw_features |= adapter->netdev->features;
3818
3819         memset(&crq, 0, sizeof(crq));
3820         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3821         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3822         crq.control_ip_offload.len =
3823             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3824         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3825         ibmvnic_send_crq(adapter, &crq);
3826 }
3827
3828 static const char *ibmvnic_fw_err_cause(u16 cause)
3829 {
3830         switch (cause) {
3831         case ADAPTER_PROBLEM:
3832                 return "adapter problem";
3833         case BUS_PROBLEM:
3834                 return "bus problem";
3835         case FW_PROBLEM:
3836                 return "firmware problem";
3837         case DD_PROBLEM:
3838                 return "device driver problem";
3839         case EEH_RECOVERY:
3840                 return "EEH recovery";
3841         case FW_UPDATED:
3842                 return "firmware updated";
3843         case LOW_MEMORY:
3844                 return "low Memory";
3845         default:
3846                 return "unknown";
3847         }
3848 }
3849
3850 static void handle_error_indication(union ibmvnic_crq *crq,
3851                                     struct ibmvnic_adapter *adapter)
3852 {
3853         struct device *dev = &adapter->vdev->dev;
3854         u16 cause;
3855
3856         cause = be16_to_cpu(crq->error_indication.error_cause);
3857
3858         dev_warn_ratelimited(dev,
3859                              "Firmware reports %serror, cause: %s. Starting recovery...\n",
3860                              crq->error_indication.flags
3861                                 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3862                              ibmvnic_fw_err_cause(cause));
3863
3864         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3865                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3866         else
3867                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3868 }
3869
3870 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3871                                  struct ibmvnic_adapter *adapter)
3872 {
3873         struct net_device *netdev = adapter->netdev;
3874         struct device *dev = &adapter->vdev->dev;
3875         long rc;
3876
3877         rc = crq->change_mac_addr_rsp.rc.code;
3878         if (rc) {
3879                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3880                 goto out;
3881         }
3882         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3883                ETH_ALEN);
3884 out:
3885         complete(&adapter->fw_done);
3886         return rc;
3887 }
3888
3889 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3890                                    struct ibmvnic_adapter *adapter)
3891 {
3892         struct device *dev = &adapter->vdev->dev;
3893         u64 *req_value;
3894         char *name;
3895
3896         atomic_dec(&adapter->running_cap_crqs);
3897         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3898         case REQ_TX_QUEUES:
3899                 req_value = &adapter->req_tx_queues;
3900                 name = "tx";
3901                 break;
3902         case REQ_RX_QUEUES:
3903                 req_value = &adapter->req_rx_queues;
3904                 name = "rx";
3905                 break;
3906         case REQ_RX_ADD_QUEUES:
3907                 req_value = &adapter->req_rx_add_queues;
3908                 name = "rx_add";
3909                 break;
3910         case REQ_TX_ENTRIES_PER_SUBCRQ:
3911                 req_value = &adapter->req_tx_entries_per_subcrq;
3912                 name = "tx_entries_per_subcrq";
3913                 break;
3914         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3915                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3916                 name = "rx_add_entries_per_subcrq";
3917                 break;
3918         case REQ_MTU:
3919                 req_value = &adapter->req_mtu;
3920                 name = "mtu";
3921                 break;
3922         case PROMISC_REQUESTED:
3923                 req_value = &adapter->promisc;
3924                 name = "promisc";
3925                 break;
3926         default:
3927                 dev_err(dev, "Got invalid cap request rsp %d\n",
3928                         crq->request_capability.capability);
3929                 return;
3930         }
3931
3932         switch (crq->request_capability_rsp.rc.code) {
3933         case SUCCESS:
3934                 break;
3935         case PARTIALSUCCESS:
3936                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3937                          *req_value,
3938                          (long int)be64_to_cpu(crq->request_capability_rsp.
3939                                                number), name);
3940
3941                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3942                     REQ_MTU) {
3943                         pr_err("mtu of %llu is not supported. Reverting.\n",
3944                                *req_value);
3945                         *req_value = adapter->fallback.mtu;
3946                 } else {
3947                         *req_value =
3948                                 be64_to_cpu(crq->request_capability_rsp.number);
3949                 }
3950
3951                 ibmvnic_send_req_caps(adapter, 1);
3952                 return;
3953         default:
3954                 dev_err(dev, "Error %d in request cap rsp\n",
3955                         crq->request_capability_rsp.rc.code);
3956                 return;
3957         }
3958
3959         /* Done receiving requested capabilities, query IP offload support */
3960         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3961                 union ibmvnic_crq newcrq;
3962                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3963                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3964                     &adapter->ip_offload_buf;
3965
3966                 adapter->wait_capability = false;
3967                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3968                                                          buf_sz,
3969                                                          DMA_FROM_DEVICE);
3970
3971                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3972                         if (!firmware_has_feature(FW_FEATURE_CMO))
3973                                 dev_err(dev, "Couldn't map offload buffer\n");
3974                         return;
3975                 }
3976
3977                 memset(&newcrq, 0, sizeof(newcrq));
3978                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3979                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3980                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3981                 newcrq.query_ip_offload.ioba =
3982                     cpu_to_be32(adapter->ip_offload_tok);
3983
3984                 ibmvnic_send_crq(adapter, &newcrq);
3985         }
3986 }
3987
3988 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3989                             struct ibmvnic_adapter *adapter)
3990 {
3991         struct device *dev = &adapter->vdev->dev;
3992         struct net_device *netdev = adapter->netdev;
3993         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3994         struct ibmvnic_login_buffer *login = adapter->login_buf;
3995         int i;
3996
3997         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3998                          DMA_TO_DEVICE);
3999         dma_unmap_single(dev, adapter->login_rsp_buf_token,
4000                          adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4001
4002         /* If the number of queues requested can't be allocated by the
4003          * server, the login response will return with code 1. We will need
4004          * to resend the login buffer with fewer queues requested.
4005          */
4006         if (login_rsp_crq->generic.rc.code) {
4007                 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4008                 complete(&adapter->init_done);
4009                 return 0;
4010         }
4011
4012         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4013
4014         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4015         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4016                 netdev_dbg(adapter->netdev, "%016lx\n",
4017                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4018         }
4019
4020         /* Sanity checks */
4021         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4022             (be32_to_cpu(login->num_rxcomp_subcrqs) *
4023              adapter->req_rx_add_queues !=
4024              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4025                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4026                 ibmvnic_remove(adapter->vdev);
4027                 return -EIO;
4028         }
4029         release_login_buffer(adapter);
4030         complete(&adapter->init_done);
4031
4032         return 0;
4033 }
4034
4035 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4036                                      struct ibmvnic_adapter *adapter)
4037 {
4038         struct device *dev = &adapter->vdev->dev;
4039         long rc;
4040
4041         rc = crq->request_unmap_rsp.rc.code;
4042         if (rc)
4043                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4044 }
4045
4046 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4047                                  struct ibmvnic_adapter *adapter)
4048 {
4049         struct net_device *netdev = adapter->netdev;
4050         struct device *dev = &adapter->vdev->dev;
4051         long rc;
4052
4053         rc = crq->query_map_rsp.rc.code;
4054         if (rc) {
4055                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4056                 return;
4057         }
4058         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4059                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4060                    crq->query_map_rsp.free_pages);
4061 }
4062
4063 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4064                                  struct ibmvnic_adapter *adapter)
4065 {
4066         struct net_device *netdev = adapter->netdev;
4067         struct device *dev = &adapter->vdev->dev;
4068         long rc;
4069
4070         atomic_dec(&adapter->running_cap_crqs);
4071         netdev_dbg(netdev, "Outstanding queries: %d\n",
4072                    atomic_read(&adapter->running_cap_crqs));
4073         rc = crq->query_capability.rc.code;
4074         if (rc) {
4075                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4076                 goto out;
4077         }
4078
4079         switch (be16_to_cpu(crq->query_capability.capability)) {
4080         case MIN_TX_QUEUES:
4081                 adapter->min_tx_queues =
4082                     be64_to_cpu(crq->query_capability.number);
4083                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4084                            adapter->min_tx_queues);
4085                 break;
4086         case MIN_RX_QUEUES:
4087                 adapter->min_rx_queues =
4088                     be64_to_cpu(crq->query_capability.number);
4089                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4090                            adapter->min_rx_queues);
4091                 break;
4092         case MIN_RX_ADD_QUEUES:
4093                 adapter->min_rx_add_queues =
4094                     be64_to_cpu(crq->query_capability.number);
4095                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4096                            adapter->min_rx_add_queues);
4097                 break;
4098         case MAX_TX_QUEUES:
4099                 adapter->max_tx_queues =
4100                     be64_to_cpu(crq->query_capability.number);
4101                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4102                            adapter->max_tx_queues);
4103                 break;
4104         case MAX_RX_QUEUES:
4105                 adapter->max_rx_queues =
4106                     be64_to_cpu(crq->query_capability.number);
4107                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4108                            adapter->max_rx_queues);
4109                 break;
4110         case MAX_RX_ADD_QUEUES:
4111                 adapter->max_rx_add_queues =
4112                     be64_to_cpu(crq->query_capability.number);
4113                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4114                            adapter->max_rx_add_queues);
4115                 break;
4116         case MIN_TX_ENTRIES_PER_SUBCRQ:
4117                 adapter->min_tx_entries_per_subcrq =
4118                     be64_to_cpu(crq->query_capability.number);
4119                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4120                            adapter->min_tx_entries_per_subcrq);
4121                 break;
4122         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4123                 adapter->min_rx_add_entries_per_subcrq =
4124                     be64_to_cpu(crq->query_capability.number);
4125                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4126                            adapter->min_rx_add_entries_per_subcrq);
4127                 break;
4128         case MAX_TX_ENTRIES_PER_SUBCRQ:
4129                 adapter->max_tx_entries_per_subcrq =
4130                     be64_to_cpu(crq->query_capability.number);
4131                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4132                            adapter->max_tx_entries_per_subcrq);
4133                 break;
4134         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4135                 adapter->max_rx_add_entries_per_subcrq =
4136                     be64_to_cpu(crq->query_capability.number);
4137                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4138                            adapter->max_rx_add_entries_per_subcrq);
4139                 break;
4140         case TCP_IP_OFFLOAD:
4141                 adapter->tcp_ip_offload =
4142                     be64_to_cpu(crq->query_capability.number);
4143                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4144                            adapter->tcp_ip_offload);
4145                 break;
4146         case PROMISC_SUPPORTED:
4147                 adapter->promisc_supported =
4148                     be64_to_cpu(crq->query_capability.number);
4149                 netdev_dbg(netdev, "promisc_supported = %lld\n",
4150                            adapter->promisc_supported);
4151                 break;
4152         case MIN_MTU:
4153                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4154                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4155                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4156                 break;
4157         case MAX_MTU:
4158                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4159                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4160                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4161                 break;
4162         case MAX_MULTICAST_FILTERS:
4163                 adapter->max_multicast_filters =
4164                     be64_to_cpu(crq->query_capability.number);
4165                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4166                            adapter->max_multicast_filters);
4167                 break;
4168         case VLAN_HEADER_INSERTION:
4169                 adapter->vlan_header_insertion =
4170                     be64_to_cpu(crq->query_capability.number);
4171                 if (adapter->vlan_header_insertion)
4172                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4173                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4174                            adapter->vlan_header_insertion);
4175                 break;
4176         case RX_VLAN_HEADER_INSERTION:
4177                 adapter->rx_vlan_header_insertion =
4178                     be64_to_cpu(crq->query_capability.number);
4179                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4180                            adapter->rx_vlan_header_insertion);
4181                 break;
4182         case MAX_TX_SG_ENTRIES:
4183                 adapter->max_tx_sg_entries =
4184                     be64_to_cpu(crq->query_capability.number);
4185                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4186                            adapter->max_tx_sg_entries);
4187                 break;
4188         case RX_SG_SUPPORTED:
4189                 adapter->rx_sg_supported =
4190                     be64_to_cpu(crq->query_capability.number);
4191                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4192                            adapter->rx_sg_supported);
4193                 break;
4194         case OPT_TX_COMP_SUB_QUEUES:
4195                 adapter->opt_tx_comp_sub_queues =
4196                     be64_to_cpu(crq->query_capability.number);
4197                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4198                            adapter->opt_tx_comp_sub_queues);
4199                 break;
4200         case OPT_RX_COMP_QUEUES:
4201                 adapter->opt_rx_comp_queues =
4202                     be64_to_cpu(crq->query_capability.number);
4203                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4204                            adapter->opt_rx_comp_queues);
4205                 break;
4206         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4207                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4208                     be64_to_cpu(crq->query_capability.number);
4209                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4210                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4211                 break;
4212         case OPT_TX_ENTRIES_PER_SUBCRQ:
4213                 adapter->opt_tx_entries_per_subcrq =
4214                     be64_to_cpu(crq->query_capability.number);
4215                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4216                            adapter->opt_tx_entries_per_subcrq);
4217                 break;
4218         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4219                 adapter->opt_rxba_entries_per_subcrq =
4220                     be64_to_cpu(crq->query_capability.number);
4221                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4222                            adapter->opt_rxba_entries_per_subcrq);
4223                 break;
4224         case TX_RX_DESC_REQ:
4225                 adapter->tx_rx_desc_req = crq->query_capability.number;
4226                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4227                            adapter->tx_rx_desc_req);
4228                 break;
4229
4230         default:
4231                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4232                            crq->query_capability.capability);
4233         }
4234
4235 out:
4236         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4237                 adapter->wait_capability = false;
4238                 ibmvnic_send_req_caps(adapter, 0);
4239         }
4240 }
4241
4242 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4243                                struct ibmvnic_adapter *adapter)
4244 {
4245         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4246         struct net_device *netdev = adapter->netdev;
4247         struct device *dev = &adapter->vdev->dev;
4248         u64 *u64_crq = (u64 *)crq;
4249         long rc;
4250
4251         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4252                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4253                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4254         switch (gen_crq->first) {
4255         case IBMVNIC_CRQ_INIT_RSP:
4256                 switch (gen_crq->cmd) {
4257                 case IBMVNIC_CRQ_INIT:
4258                         dev_info(dev, "Partner initialized\n");
4259                         adapter->from_passive_init = true;
4260                         adapter->failover_pending = false;
4261                         if (!completion_done(&adapter->init_done)) {
4262                                 complete(&adapter->init_done);
4263                                 adapter->init_done_rc = -EIO;
4264                         }
4265                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4266                         break;
4267                 case IBMVNIC_CRQ_INIT_COMPLETE:
4268                         dev_info(dev, "Partner initialization complete\n");
4269                         adapter->crq.active = true;
4270                         send_version_xchg(adapter);
4271                         break;
4272                 default:
4273                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4274                 }
4275                 return;
4276         case IBMVNIC_CRQ_XPORT_EVENT:
4277                 netif_carrier_off(netdev);
4278                 adapter->crq.active = false;
4279                 if (adapter->resetting)
4280                         adapter->force_reset_recovery = true;
4281                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4282                         dev_info(dev, "Migrated, re-enabling adapter\n");
4283                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4284                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4285                         dev_info(dev, "Backing device failover detected\n");
4286                         adapter->failover_pending = true;
4287                 } else {
4288                         /* The adapter lost the connection */
4289                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4290                                 gen_crq->cmd);
4291                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4292                 }
4293                 return;
4294         case IBMVNIC_CRQ_CMD_RSP:
4295                 break;
4296         default:
4297                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4298                         gen_crq->first);
4299                 return;
4300         }
4301
4302         switch (gen_crq->cmd) {
4303         case VERSION_EXCHANGE_RSP:
4304                 rc = crq->version_exchange_rsp.rc.code;
4305                 if (rc) {
4306                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4307                         break;
4308                 }
4309                 dev_info(dev, "Partner protocol version is %d\n",
4310                          crq->version_exchange_rsp.version);
4311                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4312                     ibmvnic_version)
4313                         ibmvnic_version =
4314                             be16_to_cpu(crq->version_exchange_rsp.version);
4315                 send_cap_queries(adapter);
4316                 break;
4317         case QUERY_CAPABILITY_RSP:
4318                 handle_query_cap_rsp(crq, adapter);
4319                 break;
4320         case QUERY_MAP_RSP:
4321                 handle_query_map_rsp(crq, adapter);
4322                 break;
4323         case REQUEST_MAP_RSP:
4324                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4325                 complete(&adapter->fw_done);
4326                 break;
4327         case REQUEST_UNMAP_RSP:
4328                 handle_request_unmap_rsp(crq, adapter);
4329                 break;
4330         case REQUEST_CAPABILITY_RSP:
4331                 handle_request_cap_rsp(crq, adapter);
4332                 break;
4333         case LOGIN_RSP:
4334                 netdev_dbg(netdev, "Got Login Response\n");
4335                 handle_login_rsp(crq, adapter);
4336                 break;
4337         case LOGICAL_LINK_STATE_RSP:
4338                 netdev_dbg(netdev,
4339                            "Got Logical Link State Response, state: %d rc: %d\n",
4340                            crq->logical_link_state_rsp.link_state,
4341                            crq->logical_link_state_rsp.rc.code);
4342                 adapter->logical_link_state =
4343                     crq->logical_link_state_rsp.link_state;
4344                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4345                 complete(&adapter->init_done);
4346                 break;
4347         case LINK_STATE_INDICATION:
4348                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4349                 adapter->phys_link_state =
4350                     crq->link_state_indication.phys_link_state;
4351                 adapter->logical_link_state =
4352                     crq->link_state_indication.logical_link_state;
4353                 break;
4354         case CHANGE_MAC_ADDR_RSP:
4355                 netdev_dbg(netdev, "Got MAC address change Response\n");
4356                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4357                 break;
4358         case ERROR_INDICATION:
4359                 netdev_dbg(netdev, "Got Error Indication\n");
4360                 handle_error_indication(crq, adapter);
4361                 break;
4362         case REQUEST_STATISTICS_RSP:
4363                 netdev_dbg(netdev, "Got Statistics Response\n");
4364                 complete(&adapter->stats_done);
4365                 break;
4366         case QUERY_IP_OFFLOAD_RSP:
4367                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4368                 handle_query_ip_offload_rsp(adapter);
4369                 break;
4370         case MULTICAST_CTRL_RSP:
4371                 netdev_dbg(netdev, "Got multicast control Response\n");
4372                 break;
4373         case CONTROL_IP_OFFLOAD_RSP:
4374                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4375                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4376                                  sizeof(adapter->ip_offload_ctrl),
4377                                  DMA_TO_DEVICE);
4378                 complete(&adapter->init_done);
4379                 break;
4380         case COLLECT_FW_TRACE_RSP:
4381                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4382                 complete(&adapter->fw_done);
4383                 break;
4384         case GET_VPD_SIZE_RSP:
4385                 handle_vpd_size_rsp(crq, adapter);
4386                 break;
4387         case GET_VPD_RSP:
4388                 handle_vpd_rsp(crq, adapter);
4389                 break;
4390         default:
4391                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4392                            gen_crq->cmd);
4393         }
4394 }
4395
4396 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4397 {
4398         struct ibmvnic_adapter *adapter = instance;
4399
4400         tasklet_schedule(&adapter->tasklet);
4401         return IRQ_HANDLED;
4402 }
4403
4404 static void ibmvnic_tasklet(void *data)
4405 {
4406         struct ibmvnic_adapter *adapter = data;
4407         struct ibmvnic_crq_queue *queue = &adapter->crq;
4408         union ibmvnic_crq *crq;
4409         unsigned long flags;
4410         bool done = false;
4411
4412         spin_lock_irqsave(&queue->lock, flags);
4413         while (!done) {
4414                 /* Pull all the valid messages off the CRQ */
4415                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4416                         ibmvnic_handle_crq(crq, adapter);
4417                         crq->generic.first = 0;
4418                 }
4419
4420                 /* remain in tasklet until all
4421                  * capabilities responses are received
4422                  */
4423                 if (!adapter->wait_capability)
4424                         done = true;
4425         }
4426         /* if capabilities CRQ's were sent in this tasklet, the following
4427          * tasklet must wait until all responses are received
4428          */
4429         if (atomic_read(&adapter->running_cap_crqs) != 0)
4430                 adapter->wait_capability = true;
4431         spin_unlock_irqrestore(&queue->lock, flags);
4432 }
4433
4434 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4435 {
4436         struct vio_dev *vdev = adapter->vdev;
4437         int rc;
4438
4439         do {
4440                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4441         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4442
4443         if (rc)
4444                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4445
4446         return rc;
4447 }
4448
4449 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4450 {
4451         struct ibmvnic_crq_queue *crq = &adapter->crq;
4452         struct device *dev = &adapter->vdev->dev;
4453         struct vio_dev *vdev = adapter->vdev;
4454         int rc;
4455
4456         /* Close the CRQ */
4457         do {
4458                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4459         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4460
4461         /* Clean out the queue */
4462         memset(crq->msgs, 0, PAGE_SIZE);
4463         crq->cur = 0;
4464         crq->active = false;
4465
4466         /* And re-open it again */
4467         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4468                                 crq->msg_token, PAGE_SIZE);
4469
4470         if (rc == H_CLOSED)
4471                 /* Adapter is good, but other end is not ready */
4472                 dev_warn(dev, "Partner adapter not ready\n");
4473         else if (rc != 0)
4474                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4475
4476         return rc;
4477 }
4478
4479 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4480 {
4481         struct ibmvnic_crq_queue *crq = &adapter->crq;
4482         struct vio_dev *vdev = adapter->vdev;
4483         long rc;
4484
4485         if (!crq->msgs)
4486                 return;
4487
4488         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4489         free_irq(vdev->irq, adapter);
4490         tasklet_kill(&adapter->tasklet);
4491         do {
4492                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4493         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4494
4495         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4496                          DMA_BIDIRECTIONAL);
4497         free_page((unsigned long)crq->msgs);
4498         crq->msgs = NULL;
4499         crq->active = false;
4500 }
4501
4502 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4503 {
4504         struct ibmvnic_crq_queue *crq = &adapter->crq;
4505         struct device *dev = &adapter->vdev->dev;
4506         struct vio_dev *vdev = adapter->vdev;
4507         int rc, retrc = -ENOMEM;
4508
4509         if (crq->msgs)
4510                 return 0;
4511
4512         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4513         /* Should we allocate more than one page? */
4514
4515         if (!crq->msgs)
4516                 return -ENOMEM;
4517
4518         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4519         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4520                                         DMA_BIDIRECTIONAL);
4521         if (dma_mapping_error(dev, crq->msg_token))
4522                 goto map_failed;
4523
4524         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4525                                 crq->msg_token, PAGE_SIZE);
4526
4527         if (rc == H_RESOURCE)
4528                 /* maybe kexecing and resource is busy. try a reset */
4529                 rc = ibmvnic_reset_crq(adapter);
4530         retrc = rc;
4531
4532         if (rc == H_CLOSED) {
4533                 dev_warn(dev, "Partner adapter not ready\n");
4534         } else if (rc) {
4535                 dev_warn(dev, "Error %d opening adapter\n", rc);
4536                 goto reg_crq_failed;
4537         }
4538
4539         retrc = 0;
4540
4541         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4542                      (unsigned long)adapter);
4543
4544         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4545         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4546                          adapter);
4547         if (rc) {
4548                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4549                         vdev->irq, rc);
4550                 goto req_irq_failed;
4551         }
4552
4553         rc = vio_enable_interrupts(vdev);
4554         if (rc) {
4555                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4556                 goto req_irq_failed;
4557         }
4558
4559         crq->cur = 0;
4560         spin_lock_init(&crq->lock);
4561
4562         return retrc;
4563
4564 req_irq_failed:
4565         tasklet_kill(&adapter->tasklet);
4566         do {
4567                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4568         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4569 reg_crq_failed:
4570         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4571 map_failed:
4572         free_page((unsigned long)crq->msgs);
4573         crq->msgs = NULL;
4574         return retrc;
4575 }
4576
4577 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4578 {
4579         struct device *dev = &adapter->vdev->dev;
4580         unsigned long timeout = msecs_to_jiffies(30000);
4581         u64 old_num_rx_queues, old_num_tx_queues;
4582         int rc;
4583
4584         adapter->from_passive_init = false;
4585
4586         old_num_rx_queues = adapter->req_rx_queues;
4587         old_num_tx_queues = adapter->req_tx_queues;
4588
4589         init_completion(&adapter->init_done);
4590         adapter->init_done_rc = 0;
4591         ibmvnic_send_crq_init(adapter);
4592         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4593                 dev_err(dev, "Initialization sequence timed out\n");
4594                 return -1;
4595         }
4596
4597         if (adapter->init_done_rc) {
4598                 release_crq_queue(adapter);
4599                 return adapter->init_done_rc;
4600         }
4601
4602         if (adapter->from_passive_init) {
4603                 adapter->state = VNIC_OPEN;
4604                 adapter->from_passive_init = false;
4605                 return -1;
4606         }
4607
4608         if (adapter->resetting && !adapter->wait_for_reset &&
4609             adapter->reset_reason != VNIC_RESET_MOBILITY) {
4610                 if (adapter->req_rx_queues != old_num_rx_queues ||
4611                     adapter->req_tx_queues != old_num_tx_queues) {
4612                         release_sub_crqs(adapter, 0);
4613                         rc = init_sub_crqs(adapter);
4614                 } else {
4615                         rc = reset_sub_crq_queues(adapter);
4616                 }
4617         } else {
4618                 rc = init_sub_crqs(adapter);
4619         }
4620
4621         if (rc) {
4622                 dev_err(dev, "Initialization of sub crqs failed\n");
4623                 release_crq_queue(adapter);
4624                 return rc;
4625         }
4626
4627         rc = init_sub_crq_irqs(adapter);
4628         if (rc) {
4629                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4630                 release_crq_queue(adapter);
4631         }
4632
4633         return rc;
4634 }
4635
4636 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4637 {
4638         struct device *dev = &adapter->vdev->dev;
4639         unsigned long timeout = msecs_to_jiffies(30000);
4640         int rc;
4641
4642         adapter->from_passive_init = false;
4643
4644         init_completion(&adapter->init_done);
4645         adapter->init_done_rc = 0;
4646         ibmvnic_send_crq_init(adapter);
4647         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4648                 dev_err(dev, "Initialization sequence timed out\n");
4649                 return -1;
4650         }
4651
4652         if (adapter->init_done_rc) {
4653                 release_crq_queue(adapter);
4654                 return adapter->init_done_rc;
4655         }
4656
4657         if (adapter->from_passive_init) {
4658                 adapter->state = VNIC_OPEN;
4659                 adapter->from_passive_init = false;
4660                 return -1;
4661         }
4662
4663         rc = init_sub_crqs(adapter);
4664         if (rc) {
4665                 dev_err(dev, "Initialization of sub crqs failed\n");
4666                 release_crq_queue(adapter);
4667                 return rc;
4668         }
4669
4670         rc = init_sub_crq_irqs(adapter);
4671         if (rc) {
4672                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4673                 release_crq_queue(adapter);
4674         }
4675
4676         return rc;
4677 }
4678
4679 static struct device_attribute dev_attr_failover;
4680
4681 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4682 {
4683         struct ibmvnic_adapter *adapter;
4684         struct net_device *netdev;
4685         unsigned char *mac_addr_p;
4686         int rc;
4687
4688         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4689                 dev->unit_address);
4690
4691         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4692                                                         VETH_MAC_ADDR, NULL);
4693         if (!mac_addr_p) {
4694                 dev_err(&dev->dev,
4695                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4696                         __FILE__, __LINE__);
4697                 return 0;
4698         }
4699
4700         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4701                                    IBMVNIC_MAX_QUEUES);
4702         if (!netdev)
4703                 return -ENOMEM;
4704
4705         adapter = netdev_priv(netdev);
4706         adapter->state = VNIC_PROBING;
4707         dev_set_drvdata(&dev->dev, netdev);
4708         adapter->vdev = dev;
4709         adapter->netdev = netdev;
4710
4711         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4712         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4713         netdev->irq = dev->irq;
4714         netdev->netdev_ops = &ibmvnic_netdev_ops;
4715         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4716         SET_NETDEV_DEV(netdev, &dev->dev);
4717
4718         spin_lock_init(&adapter->stats_lock);
4719
4720         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4721         INIT_LIST_HEAD(&adapter->rwi_list);
4722         mutex_init(&adapter->reset_lock);
4723         mutex_init(&adapter->rwi_lock);
4724         adapter->resetting = false;
4725
4726         adapter->mac_change_pending = false;
4727
4728         do {
4729                 rc = init_crq_queue(adapter);
4730                 if (rc) {
4731                         dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4732                                 rc);
4733                         goto ibmvnic_init_fail;
4734                 }
4735
4736                 rc = ibmvnic_init(adapter);
4737                 if (rc && rc != EAGAIN)
4738                         goto ibmvnic_init_fail;
4739         } while (rc == EAGAIN);
4740
4741         rc = init_stats_buffers(adapter);
4742         if (rc)
4743                 goto ibmvnic_init_fail;
4744
4745         rc = init_stats_token(adapter);
4746         if (rc)
4747                 goto ibmvnic_stats_fail;
4748
4749         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4750         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4751         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4752
4753         rc = device_create_file(&dev->dev, &dev_attr_failover);
4754         if (rc)
4755                 goto ibmvnic_dev_file_err;
4756
4757         netif_carrier_off(netdev);
4758         rc = register_netdev(netdev);
4759         if (rc) {
4760                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4761                 goto ibmvnic_register_fail;
4762         }
4763         dev_info(&dev->dev, "ibmvnic registered\n");
4764
4765         adapter->state = VNIC_PROBED;
4766
4767         adapter->wait_for_reset = false;
4768
4769         return 0;
4770
4771 ibmvnic_register_fail:
4772         device_remove_file(&dev->dev, &dev_attr_failover);
4773
4774 ibmvnic_dev_file_err:
4775         release_stats_token(adapter);
4776
4777 ibmvnic_stats_fail:
4778         release_stats_buffers(adapter);
4779
4780 ibmvnic_init_fail:
4781         release_sub_crqs(adapter, 1);
4782         release_crq_queue(adapter);
4783         free_netdev(netdev);
4784
4785         return rc;
4786 }
4787
4788 static int ibmvnic_remove(struct vio_dev *dev)
4789 {
4790         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4791         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4792
4793         adapter->state = VNIC_REMOVING;
4794         unregister_netdev(netdev);
4795         mutex_lock(&adapter->reset_lock);
4796
4797         release_resources(adapter);
4798         release_sub_crqs(adapter, 1);
4799         release_crq_queue(adapter);
4800
4801         release_stats_token(adapter);
4802         release_stats_buffers(adapter);
4803
4804         adapter->state = VNIC_REMOVED;
4805
4806         mutex_unlock(&adapter->reset_lock);
4807         device_remove_file(&dev->dev, &dev_attr_failover);
4808         free_netdev(netdev);
4809         dev_set_drvdata(&dev->dev, NULL);
4810
4811         return 0;
4812 }
4813
4814 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4815                               const char *buf, size_t count)
4816 {
4817         struct net_device *netdev = dev_get_drvdata(dev);
4818         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4819         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4820         __be64 session_token;
4821         long rc;
4822
4823         if (!sysfs_streq(buf, "1"))
4824                 return -EINVAL;
4825
4826         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4827                          H_GET_SESSION_TOKEN, 0, 0, 0);
4828         if (rc) {
4829                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4830                            rc);
4831                 return -EINVAL;
4832         }
4833
4834         session_token = (__be64)retbuf[0];
4835         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4836                    be64_to_cpu(session_token));
4837         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4838                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4839         if (rc) {
4840                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4841                            rc);
4842                 return -EINVAL;
4843         }
4844
4845         return count;
4846 }
4847
4848 static DEVICE_ATTR_WO(failover);
4849
4850 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4851 {
4852         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4853         struct ibmvnic_adapter *adapter;
4854         struct iommu_table *tbl;
4855         unsigned long ret = 0;
4856         int i;
4857
4858         tbl = get_iommu_table_base(&vdev->dev);
4859
4860         /* netdev inits at probe time along with the structures we need below*/
4861         if (!netdev)
4862                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4863
4864         adapter = netdev_priv(netdev);
4865
4866         ret += PAGE_SIZE; /* the crq message queue */
4867         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4868
4869         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4870                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4871
4872         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4873              i++)
4874                 ret += adapter->rx_pool[i].size *
4875                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4876
4877         return ret;
4878 }
4879
4880 static int ibmvnic_resume(struct device *dev)
4881 {
4882         struct net_device *netdev = dev_get_drvdata(dev);
4883         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4884
4885         if (adapter->state != VNIC_OPEN)
4886                 return 0;
4887
4888         tasklet_schedule(&adapter->tasklet);
4889
4890         return 0;
4891 }
4892
4893 static const struct vio_device_id ibmvnic_device_table[] = {
4894         {"network", "IBM,vnic"},
4895         {"", "" }
4896 };
4897 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4898
4899 static const struct dev_pm_ops ibmvnic_pm_ops = {
4900         .resume = ibmvnic_resume
4901 };
4902
4903 static struct vio_driver ibmvnic_driver = {
4904         .id_table       = ibmvnic_device_table,
4905         .probe          = ibmvnic_probe,
4906         .remove         = ibmvnic_remove,
4907         .get_desired_dma = ibmvnic_get_desired_dma,
4908         .name           = ibmvnic_driver_name,
4909         .pm             = &ibmvnic_pm_ops,
4910 };
4911
4912 /* module functions */
4913 static int __init ibmvnic_module_init(void)
4914 {
4915         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4916                 IBMVNIC_DRIVER_VERSION);
4917
4918         return vio_register_driver(&ibmvnic_driver);
4919 }
4920
4921 static void __exit ibmvnic_module_exit(void)
4922 {
4923         vio_unregister_driver(&ibmvnic_driver);
4924 }
4925
4926 module_init(ibmvnic_module_init);
4927 module_exit(ibmvnic_module_exit);