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         dev_info(dev, "replenish pools failure\n");
 333         pool->free_map[pool->next_free] = index;
 334         pool->rx_buff[index].skb = NULL;
 335
 336         dev_kfree_skb_any(skb);
 337         adapter->replenish_add_buff_failure++;
 338         atomic_add(buffers_added, &pool->available);
 339
 340         if (lpar_rc == H_CLOSED || adapter->failover_pending) {
 341                 /* Disable buffer pool replenishment and report carrier off if
 342                  * queue is closed or pending failover.
 343                  * Firmware guarantees that a signal will be sent to the
 344                  * driver, triggering a reset.
 345                  */
 346                 deactivate_rx_pools(adapter);
 347                 netif_carrier_off(adapter->netdev);
 348         }
 349 }
 350
 351 static void replenish_pools(struct ibmvnic_adapter *adapter)
 352 {
 353         int i;
 354
 355         adapter->replenish_task_cycles++;
 356         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 357              i++) {
 358                 if (adapter->rx_pool[i].active)
 359                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 360         }
 361 }
 362
 363 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
 364 {
 365         kfree(adapter->tx_stats_buffers);
 366         kfree(adapter->rx_stats_buffers);
 367         adapter->tx_stats_buffers = NULL;
 368         adapter->rx_stats_buffers = NULL;
 369 }
 370
 371 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
 372 {
 373         adapter->tx_stats_buffers =
 374                                 kcalloc(IBMVNIC_MAX_QUEUES,
 375                                         sizeof(struct ibmvnic_tx_queue_stats),
 376                                         GFP_KERNEL);
 377         if (!adapter->tx_stats_buffers)
 378                 return -ENOMEM;
 379
 380         adapter->rx_stats_buffers =
 381                                 kcalloc(IBMVNIC_MAX_QUEUES,
 382                                         sizeof(struct ibmvnic_rx_queue_stats),
 383                                         GFP_KERNEL);
 384         if (!adapter->rx_stats_buffers)
 385                 return -ENOMEM;
 386
 387         return 0;
 388 }
 389
 390 static void release_stats_token(struct ibmvnic_adapter *adapter)
 391 {
 392         struct device *dev = &adapter->vdev->dev;
 393
 394         if (!adapter->stats_token)
 395                 return;
 396
 397         dma_unmap_single(dev, adapter->stats_token,
 398                          sizeof(struct ibmvnic_statistics),
 399                          DMA_FROM_DEVICE);
 400         adapter->stats_token = 0;
 401 }
 402
 403 static int init_stats_token(struct ibmvnic_adapter *adapter)
 404 {
 405         struct device *dev = &adapter->vdev->dev;
 406         dma_addr_t stok;
 407
 408         stok = dma_map_single(dev, &adapter->stats,
 409                               sizeof(struct ibmvnic_statistics),
 410                               DMA_FROM_DEVICE);
 411         if (dma_mapping_error(dev, stok)) {
 412                 dev_err(dev, "Couldn't map stats buffer\n");
 413                 return -1;
 414         }
 415
 416         adapter->stats_token = stok;
 417         netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
 418         return 0;
 419 }
 420
 421 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 422 {
 423         struct ibmvnic_rx_pool *rx_pool;
 424         int rx_scrqs;
 425         int i, j, rc;
 426         u64 *size_array;
 427
 428         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 429                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 430
 431         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 432         for (i = 0; i < rx_scrqs; i++) {
 433                 rx_pool = &adapter->rx_pool[i];
 434
 435                 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
 436
 437                 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
 438                         free_long_term_buff(adapter, &rx_pool->long_term_buff);
 439                         rx_pool->buff_size = be64_to_cpu(size_array[i]);
 440                         alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 441                                              rx_pool->size *
 442                                              rx_pool->buff_size);
 443                 } else {
 444                         rc = reset_long_term_buff(adapter,
 445                                                   &rx_pool->long_term_buff);
 446                 }
 447
 448                 if (rc)
 449                         return rc;
 450
 451                 for (j = 0; j < rx_pool->size; j++)
 452                         rx_pool->free_map[j] = j;
 453
 454                 memset(rx_pool->rx_buff, 0,
 455                        rx_pool->size * sizeof(struct ibmvnic_rx_buff));
 456
 457                 atomic_set(&rx_pool->available, 0);
 458                 rx_pool->next_alloc = 0;
 459                 rx_pool->next_free = 0;
 460                 rx_pool->active = 1;
 461         }
 462
 463         return 0;
 464 }
 465
 466 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 467 {
 468         struct ibmvnic_rx_pool *rx_pool;
 469         int i, j;
 470
 471         if (!adapter->rx_pool)
 472                 return;
 473
 474         for (i = 0; i < adapter->num_active_rx_pools; i++) {
 475                 rx_pool = &adapter->rx_pool[i];
 476
 477                 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
 478
 479                 kfree(rx_pool->free_map);
 480                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 481
 482                 if (!rx_pool->rx_buff)
 483                         continue;
 484
 485                 for (j = 0; j < rx_pool->size; j++) {
 486                         if (rx_pool->rx_buff[j].skb) {
 487                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 488                                 rx_pool->rx_buff[i].skb = NULL;
 489                         }
 490                 }
 491
 492                 kfree(rx_pool->rx_buff);
 493         }
 494
 495         kfree(adapter->rx_pool);
 496         adapter->rx_pool = NULL;
 497         adapter->num_active_rx_pools = 0;
 498 }
 499
 500 static int init_rx_pools(struct net_device *netdev)
 501 {
 502         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 503         struct device *dev = &adapter->vdev->dev;
 504         struct ibmvnic_rx_pool *rx_pool;
 505         int rxadd_subcrqs;
 506         u64 *size_array;
 507         int i, j;
 508
 509         rxadd_subcrqs =
 510                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 511         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 512                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 513
 514         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 515                                    sizeof(struct ibmvnic_rx_pool),
 516                                    GFP_KERNEL);
 517         if (!adapter->rx_pool) {
 518                 dev_err(dev, "Failed to allocate rx pools\n");
 519                 return -1;
 520         }
 521
 522         adapter->num_active_rx_pools = rxadd_subcrqs;
 523
 524         for (i = 0; i < rxadd_subcrqs; i++) {
 525                 rx_pool = &adapter->rx_pool[i];
 526
 527                 netdev_dbg(adapter->netdev,
 528                            "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
 529                            i, adapter->req_rx_add_entries_per_subcrq,
 530                            be64_to_cpu(size_array[i]));
 531
 532                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 533                 rx_pool->index = i;
 534                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 535                 rx_pool->active = 1;
 536
 537                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 538                                             GFP_KERNEL);
 539                 if (!rx_pool->free_map) {
 540                         release_rx_pools(adapter);
 541                         return -1;
 542                 }
 543
 544                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 545                                            sizeof(struct ibmvnic_rx_buff),
 546                                            GFP_KERNEL);
 547                 if (!rx_pool->rx_buff) {
 548                         dev_err(dev, "Couldn't alloc rx buffers\n");
 549                         release_rx_pools(adapter);
 550                         return -1;
 551                 }
 552
 553                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 554                                          rx_pool->size * rx_pool->buff_size)) {
 555                         release_rx_pools(adapter);
 556                         return -1;
 557                 }
 558
 559                 for (j = 0; j < rx_pool->size; ++j)
 560                         rx_pool->free_map[j] = j;
 561
 562                 atomic_set(&rx_pool->available, 0);
 563                 rx_pool->next_alloc = 0;
 564                 rx_pool->next_free = 0;
 565         }
 566
 567         return 0;
 568 }
 569
 570 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
 571                              struct ibmvnic_tx_pool *tx_pool)
 572 {
 573         int rc, i;
 574
 575         rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
 576         if (rc)
 577                 return rc;
 578
 579         memset(tx_pool->tx_buff, 0,
 580                tx_pool->num_buffers *
 581                sizeof(struct ibmvnic_tx_buff));
 582
 583         for (i = 0; i < tx_pool->num_buffers; i++)
 584                 tx_pool->free_map[i] = i;
 585
 586         tx_pool->consumer_index = 0;
 587         tx_pool->producer_index = 0;
 588
 589         return 0;
 590 }
 591
 592 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 593 {
 594         int tx_scrqs;
 595         int i, rc;
 596
 597         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 598         for (i = 0; i < tx_scrqs; i++) {
 599                 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
 600                 if (rc)
 601                         return rc;
 602                 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
 603                 if (rc)
 604                         return rc;
 605         }
 606
 607         return 0;
 608 }
 609
 610 static void release_vpd_data(struct ibmvnic_adapter *adapter)
 611 {
 612         if (!adapter->vpd)
 613                 return;
 614
 615         kfree(adapter->vpd->buff);
 616         kfree(adapter->vpd);
 617
 618         adapter->vpd = NULL;
 619 }
 620
 621 static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
 622                                 struct ibmvnic_tx_pool *tx_pool)
 623 {
 624         kfree(tx_pool->tx_buff);
 625         kfree(tx_pool->free_map);
 626         free_long_term_buff(adapter, &tx_pool->long_term_buff);
 627 }
 628
 629 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 630 {
 631         int i;
 632
 633         if (!adapter->tx_pool)
 634                 return;
 635
 636         for (i = 0; i < adapter->num_active_tx_pools; i++) {
 637                 release_one_tx_pool(adapter, &adapter->tx_pool[i]);
 638                 release_one_tx_pool(adapter, &adapter->tso_pool[i]);
 639         }
 640
 641         kfree(adapter->tx_pool);
 642         adapter->tx_pool = NULL;
 643         kfree(adapter->tso_pool);
 644         adapter->tso_pool = NULL;
 645         adapter->num_active_tx_pools = 0;
 646 }
 647
 648 static int init_one_tx_pool(struct net_device *netdev,
 649                             struct ibmvnic_tx_pool *tx_pool,
 650                             int num_entries, int buf_size)
 651 {
 652         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 653         int i;
 654
 655         tx_pool->tx_buff = kcalloc(num_entries,
 656                                    sizeof(struct ibmvnic_tx_buff),
 657                                    GFP_KERNEL);
 658         if (!tx_pool->tx_buff)
 659                 return -1;
 660
 661         if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 662                                  num_entries * buf_size))
 663                 return -1;
 664
 665         tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
 666         if (!tx_pool->free_map)
 667                 return -1;
 668
 669         for (i = 0; i < num_entries; i++)
 670                 tx_pool->free_map[i] = i;
 671
 672         tx_pool->consumer_index = 0;
 673         tx_pool->producer_index = 0;
 674         tx_pool->num_buffers = num_entries;
 675         tx_pool->buf_size = buf_size;
 676
 677         return 0;
 678 }
 679
 680 static int init_tx_pools(struct net_device *netdev)
 681 {
 682         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 683         int tx_subcrqs;
 684         int i, rc;
 685
 686         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 687         adapter->tx_pool = kcalloc(tx_subcrqs,
 688                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 689         if (!adapter->tx_pool)
 690                 return -1;
 691
 692         adapter->tso_pool = kcalloc(tx_subcrqs,
 693                                     sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 694         if (!adapter->tso_pool)
 695                 return -1;
 696
 697         adapter->num_active_tx_pools = tx_subcrqs;
 698
 699         for (i = 0; i < tx_subcrqs; i++) {
 700                 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
 701                                       adapter->req_tx_entries_per_subcrq,
 702                                       adapter->req_mtu + VLAN_HLEN);
 703                 if (rc) {
 704                         release_tx_pools(adapter);
 705                         return rc;
 706                 }
 707
 708                 init_one_tx_pool(netdev, &adapter->tso_pool[i],
 709                                  IBMVNIC_TSO_BUFS,
 710                                  IBMVNIC_TSO_BUF_SZ);
 711                 if (rc) {
 712                         release_tx_pools(adapter);
 713                         return rc;
 714                 }
 715         }
 716
 717         return 0;
 718 }
 719
 720 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 721 {
 722         struct device *dev = &adapter->vdev->dev;
 723         struct ibmvnic_error_buff *error_buff, *tmp;
 724         unsigned long flags;
 725
 726         spin_lock_irqsave(&adapter->error_list_lock, flags);
 727         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 728                 list_del(&error_buff->list);
 729                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 730                                  DMA_FROM_DEVICE);
 731                 kfree(error_buff->buff);
 732                 kfree(error_buff);
 733         }
 734         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 735 }
 736
 737 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
 738 {
 739         int i;
 740
 741         if (adapter->napi_enabled)
 742                 return;
 743
 744         for (i = 0; i < adapter->req_rx_queues; i++)
 745                 napi_enable(&adapter->napi[i]);
 746
 747         adapter->napi_enabled = true;
 748 }
 749
 750 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
 751 {
 752         int i;
 753
 754         if (!adapter->napi_enabled)
 755                 return;
 756
 757         for (i = 0; i < adapter->req_rx_queues; i++) {
 758                 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
 759                 napi_disable(&adapter->napi[i]);
 760         }
 761
 762         adapter->napi_enabled = false;
 763 }
 764
 765 static int init_napi(struct ibmvnic_adapter *adapter)
 766 {
 767         int i;
 768
 769         adapter->napi = kcalloc(adapter->req_rx_queues,
 770                                 sizeof(struct napi_struct), GFP_KERNEL);
 771         if (!adapter->napi)
 772                 return -ENOMEM;
 773
 774         for (i = 0; i < adapter->req_rx_queues; i++) {
 775                 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
 776                 netif_napi_add(adapter->netdev, &adapter->napi[i],
 777                                ibmvnic_poll, NAPI_POLL_WEIGHT);
 778         }
 779
 780         adapter->num_active_rx_napi = adapter->req_rx_queues;
 781         return 0;
 782 }
 783
 784 static void release_napi(struct ibmvnic_adapter *adapter)
 785 {
 786         int i;
 787
 788         if (!adapter->napi)
 789                 return;
 790
 791         for (i = 0; i < adapter->num_active_rx_napi; i++) {
 792                 if (&adapter->napi[i]) {
 793                         netdev_dbg(adapter->netdev,
 794                                    "Releasing napi[%d]\n", i);
 795                         netif_napi_del(&adapter->napi[i]);
 796                 }
 797         }
 798
 799         kfree(adapter->napi);
 800         adapter->napi = NULL;
 801         adapter->num_active_rx_napi = 0;
 802         adapter->napi_enabled = false;
 803 }
 804
 805 static int ibmvnic_login(struct net_device *netdev)
 806 {
 807         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 808         unsigned long timeout = msecs_to_jiffies(30000);
 809         int retry_count = 0;
 810         int rc;
 811
 812         do {
 813                 if (retry_count > IBMVNIC_MAX_QUEUES) {
 814                         netdev_warn(netdev, "Login attempts exceeded\n");
 815                         return -1;
 816                 }
 817
 818                 adapter->init_done_rc = 0;
 819                 reinit_completion(&adapter->init_done);
 820                 rc = send_login(adapter);
 821                 if (rc) {
 822                         netdev_warn(netdev, "Unable to login\n");
 823                         return rc;
 824                 }
 825
 826                 if (!wait_for_completion_timeout(&adapter->init_done,
 827                                                  timeout)) {
 828                         netdev_warn(netdev, "Login timed out\n");
 829                         return -1;
 830                 }
 831
 832                 if (adapter->init_done_rc == PARTIALSUCCESS) {
 833                         retry_count++;
 834                         release_sub_crqs(adapter, 1);
 835
 836                         adapter->init_done_rc = 0;
 837                         reinit_completion(&adapter->init_done);
 838                         send_cap_queries(adapter);
 839                         if (!wait_for_completion_timeout(&adapter->init_done,
 840                                                          timeout)) {
 841                                 netdev_warn(netdev,
 842                                             "Capabilities query timed out\n");
 843                                 return -1;
 844                         }
 845
 846                         rc = init_sub_crqs(adapter);
 847                         if (rc) {
 848                                 netdev_warn(netdev,
 849                                             "SCRQ initialization failed\n");
 850                                 return -1;
 851                         }
 852
 853                         rc = init_sub_crq_irqs(adapter);
 854                         if (rc) {
 855                                 netdev_warn(netdev,
 856                                             "SCRQ irq initialization failed\n");
 857                                 return -1;
 858                         }
 859                 } else if (adapter->init_done_rc) {
 860                         netdev_warn(netdev, "Adapter login failed\n");
 861                         return -1;
 862                 }
 863         } while (adapter->init_done_rc == PARTIALSUCCESS);
 864
 865         /* handle pending MAC address changes after successful login */
 866         if (adapter->mac_change_pending) {
 867                 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
 868                 adapter->mac_change_pending = false;
 869         }
 870
 871         return 0;
 872 }
 873
 874 static void release_login_buffer(struct ibmvnic_adapter *adapter)
 875 {
 876         kfree(adapter->login_buf);
 877         adapter->login_buf = NULL;
 878 }
 879
 880 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
 881 {
 882         kfree(adapter->login_rsp_buf);
 883         adapter->login_rsp_buf = NULL;
 884 }
 885
 886 static void release_resources(struct ibmvnic_adapter *adapter)
 887 {
 888         release_vpd_data(adapter);
 889
 890         release_tx_pools(adapter);
 891         release_rx_pools(adapter);
 892
 893         release_error_buffers(adapter);
 894         release_napi(adapter);
 895         release_login_rsp_buffer(adapter);
 896 }
 897
 898 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 899 {
 900         struct net_device *netdev = adapter->netdev;
 901         unsigned long timeout = msecs_to_jiffies(30000);
 902         union ibmvnic_crq crq;
 903         bool resend;
 904         int rc;
 905
 906         netdev_dbg(netdev, "setting link state %d\n", link_state);
 907
 908         memset(&crq, 0, sizeof(crq));
 909         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 910         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 911         crq.logical_link_state.link_state = link_state;
 912
 913         do {
 914                 resend = false;
 915
 916                 reinit_completion(&adapter->init_done);
 917                 rc = ibmvnic_send_crq(adapter, &crq);
 918                 if (rc) {
 919                         netdev_err(netdev, "Failed to set link state\n");
 920                         return rc;
 921                 }
 922
 923                 if (!wait_for_completion_timeout(&adapter->init_done,
 924                                                  timeout)) {
 925                         netdev_err(netdev, "timeout setting link state\n");
 926                         return -1;
 927                 }
 928
 929                 if (adapter->init_done_rc == 1) {
 930                         /* Partuial success, delay and re-send */
 931                         mdelay(1000);
 932                         resend = true;
 933                 } else if (adapter->init_done_rc) {
 934                         netdev_warn(netdev, "Unable to set link state, rc=%d\n",
 935                                     adapter->init_done_rc);
 936                         return adapter->init_done_rc;
 937                 }
 938         } while (resend);
 939
 940         return 0;
 941 }
 942
 943 static int set_real_num_queues(struct net_device *netdev)
 944 {
 945         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 946         int rc;
 947
 948         netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
 949                    adapter->req_tx_queues, adapter->req_rx_queues);
 950
 951         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 952         if (rc) {
 953                 netdev_err(netdev, "failed to set the number of tx queues\n");
 954                 return rc;
 955         }
 956
 957         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 958         if (rc)
 959                 netdev_err(netdev, "failed to set the number of rx queues\n");
 960
 961         return rc;
 962 }
 963
 964 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
 965 {
 966         struct device *dev = &adapter->vdev->dev;
 967         union ibmvnic_crq crq;
 968         int len = 0;
 969         int rc;
 970
 971         if (adapter->vpd->buff)
 972                 len = adapter->vpd->len;
 973
 974         init_completion(&adapter->fw_done);
 975         crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
 976         crq.get_vpd_size.cmd = GET_VPD_SIZE;
 977         rc = ibmvnic_send_crq(adapter, &crq);
 978         if (rc)
 979                 return rc;
 980         wait_for_completion(&adapter->fw_done);
 981
 982         if (!adapter->vpd->len)
 983                 return -ENODATA;
 984
 985         if (!adapter->vpd->buff)
 986                 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
 987         else if (adapter->vpd->len != len)
 988                 adapter->vpd->buff =
 989                         krealloc(adapter->vpd->buff,
 990                                  adapter->vpd->len, GFP_KERNEL);
 991
 992         if (!adapter->vpd->buff) {
 993                 dev_err(dev, "Could allocate VPD buffer\n");
 994                 return -ENOMEM;
 995         }
 996
 997         adapter->vpd->dma_addr =
 998                 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
 999                                DMA_FROM_DEVICE);
1000         if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
1001                 dev_err(dev, "Could not map VPD buffer\n");
1002                 kfree(adapter->vpd->buff);
1003                 adapter->vpd->buff = NULL;
1004                 return -ENOMEM;
1005         }
1006
1007         reinit_completion(&adapter->fw_done);
1008         crq.get_vpd.first = IBMVNIC_CRQ_CMD;
1009         crq.get_vpd.cmd = GET_VPD;
1010         crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
1011         crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
1012         rc = ibmvnic_send_crq(adapter, &crq);
1013         if (rc) {
1014                 kfree(adapter->vpd->buff);
1015                 adapter->vpd->buff = NULL;
1016                 return rc;
1017         }
1018         wait_for_completion(&adapter->fw_done);
1019
1020         return 0;
1021 }
1022
1023 static int init_resources(struct ibmvnic_adapter *adapter)
1024 {
1025         struct net_device *netdev = adapter->netdev;
1026         int rc;
1027
1028         rc = set_real_num_queues(netdev);
1029         if (rc)
1030                 return rc;
1031
1032         adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
1033         if (!adapter->vpd)
1034                 return -ENOMEM;
1035
1036         /* Vital Product Data (VPD) */
1037         rc = ibmvnic_get_vpd(adapter);
1038         if (rc) {
1039                 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
1040                 return rc;
1041         }
1042
1043         adapter->map_id = 1;
1044
1045         rc = init_napi(adapter);
1046         if (rc)
1047                 return rc;
1048
1049         send_map_query(adapter);
1050
1051         rc = init_rx_pools(netdev);
1052         if (rc)
1053                 return rc;
1054
1055         rc = init_tx_pools(netdev);
1056         return rc;
1057 }
1058
1059 static int __ibmvnic_open(struct net_device *netdev)
1060 {
1061         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1062         enum vnic_state prev_state = adapter->state;
1063         int i, rc;
1064
1065         adapter->state = VNIC_OPENING;
1066         replenish_pools(adapter);
1067         ibmvnic_napi_enable(adapter);
1068
1069         /* We're ready to receive frames, enable the sub-crq interrupts and
1070          * set the logical link state to up
1071          */
1072         for (i = 0; i < adapter->req_rx_queues; i++) {
1073                 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
1074                 if (prev_state == VNIC_CLOSED)
1075                         enable_irq(adapter->rx_scrq[i]->irq);
1076                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1077         }
1078
1079         for (i = 0; i < adapter->req_tx_queues; i++) {
1080                 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1081                 if (prev_state == VNIC_CLOSED)
1082                         enable_irq(adapter->tx_scrq[i]->irq);
1083                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1084         }
1085
1086         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1087         if (rc) {
1088                 for (i = 0; i < adapter->req_rx_queues; i++)
1089                         napi_disable(&adapter->napi[i]);
1090                 release_resources(adapter);
1091                 return rc;
1092         }
1093
1094         netif_tx_start_all_queues(netdev);
1095
1096         if (prev_state == VNIC_CLOSED) {
1097                 for (i = 0; i < adapter->req_rx_queues; i++)
1098                         napi_schedule(&adapter->napi[i]);
1099         }
1100
1101         adapter->state = VNIC_OPEN;
1102         return rc;
1103 }
1104
1105 static int ibmvnic_open(struct net_device *netdev)
1106 {
1107         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1108         int rc;
1109
1110         /* If device failover is pending, just set device state and return.
1111          * Device operation will be handled by reset routine.
1112          */
1113         if (adapter->failover_pending) {
1114                 adapter->state = VNIC_OPEN;
1115                 return 0;
1116         }
1117
1118         mutex_lock(&adapter->reset_lock);
1119
1120         if (adapter->state != VNIC_CLOSED) {
1121                 rc = ibmvnic_login(netdev);
1122                 if (rc) {
1123                         mutex_unlock(&adapter->reset_lock);
1124                         return rc;
1125                 }
1126
1127                 rc = init_resources(adapter);
1128                 if (rc) {
1129                         netdev_err(netdev, "failed to initialize resources\n");
1130                         release_resources(adapter);
1131                         mutex_unlock(&adapter->reset_lock);
1132                         return rc;
1133                 }
1134         }
1135
1136         rc = __ibmvnic_open(netdev);
1137         netif_carrier_on(netdev);
1138
1139         mutex_unlock(&adapter->reset_lock);
1140
1141         return rc;
1142 }
1143
1144 static void clean_rx_pools(struct ibmvnic_adapter *adapter)
1145 {
1146         struct ibmvnic_rx_pool *rx_pool;
1147         struct ibmvnic_rx_buff *rx_buff;
1148         u64 rx_entries;
1149         int rx_scrqs;
1150         int i, j;
1151
1152         if (!adapter->rx_pool)
1153                 return;
1154
1155         rx_scrqs = adapter->num_active_rx_pools;
1156         rx_entries = adapter->req_rx_add_entries_per_subcrq;
1157
1158         /* Free any remaining skbs in the rx buffer pools */
1159         for (i = 0; i < rx_scrqs; i++) {
1160                 rx_pool = &adapter->rx_pool[i];
1161                 if (!rx_pool || !rx_pool->rx_buff)
1162                         continue;
1163
1164                 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
1165                 for (j = 0; j < rx_entries; j++) {
1166                         rx_buff = &rx_pool->rx_buff[j];
1167                         if (rx_buff && rx_buff->skb) {
1168                                 dev_kfree_skb_any(rx_buff->skb);
1169                                 rx_buff->skb = NULL;
1170                         }
1171                 }
1172         }
1173 }
1174
1175 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
1176                               struct ibmvnic_tx_pool *tx_pool)
1177 {
1178         struct ibmvnic_tx_buff *tx_buff;
1179         u64 tx_entries;
1180         int i;
1181
1182         if (!tx_pool || !tx_pool->tx_buff)
1183                 return;
1184
1185         tx_entries = tx_pool->num_buffers;
1186
1187         for (i = 0; i < tx_entries; i++) {
1188                 tx_buff = &tx_pool->tx_buff[i];
1189                 if (tx_buff && tx_buff->skb) {
1190                         dev_kfree_skb_any(tx_buff->skb);
1191                         tx_buff->skb = NULL;
1192                 }
1193         }
1194 }
1195
1196 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1197 {
1198         int tx_scrqs;
1199         int i;
1200
1201         if (!adapter->tx_pool || !adapter->tso_pool)
1202                 return;
1203
1204         tx_scrqs = adapter->num_active_tx_pools;
1205
1206         /* Free any remaining skbs in the tx buffer pools */
1207         for (i = 0; i < tx_scrqs; i++) {
1208                 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1209                 clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
1210                 clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
1211         }
1212 }
1213
1214 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
1215 {
1216         struct net_device *netdev = adapter->netdev;
1217         int i;
1218
1219         if (adapter->tx_scrq) {
1220                 for (i = 0; i < adapter->req_tx_queues; i++)
1221                         if (adapter->tx_scrq[i]->irq) {
1222                                 netdev_dbg(netdev,
1223                                            "Disabling tx_scrq[%d] irq\n", i);
1224                                 disable_scrq_irq(adapter, adapter->tx_scrq[i]);
1225                                 disable_irq(adapter->tx_scrq[i]->irq);
1226                         }
1227         }
1228
1229         if (adapter->rx_scrq) {
1230                 for (i = 0; i < adapter->req_rx_queues; i++) {
1231                         if (adapter->rx_scrq[i]->irq) {
1232                                 netdev_dbg(netdev,
1233                                            "Disabling rx_scrq[%d] irq\n", i);
1234                                 disable_scrq_irq(adapter, adapter->rx_scrq[i]);
1235                                 disable_irq(adapter->rx_scrq[i]->irq);
1236                         }
1237                 }
1238         }
1239 }
1240
1241 static void ibmvnic_cleanup(struct net_device *netdev)
1242 {
1243         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1244
1245         /* ensure that transmissions are stopped if called by do_reset */
1246         if (adapter->resetting)
1247                 netif_tx_disable(netdev);
1248         else
1249                 netif_tx_stop_all_queues(netdev);
1250
1251         ibmvnic_napi_disable(adapter);
1252         ibmvnic_disable_irqs(adapter);
1253
1254         clean_rx_pools(adapter);
1255         clean_tx_pools(adapter);
1256 }
1257
1258 static int __ibmvnic_close(struct net_device *netdev)
1259 {
1260         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1261         int rc = 0;
1262
1263         adapter->state = VNIC_CLOSING;
1264         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1265         if (rc)
1266                 return rc;
1267         adapter->state = VNIC_CLOSED;
1268         return 0;
1269 }
1270
1271 static int ibmvnic_close(struct net_device *netdev)
1272 {
1273         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1274         int rc;
1275
1276         /* If device failover is pending, just set device state and return.
1277          * Device operation will be handled by reset routine.
1278          */
1279         if (adapter->failover_pending) {
1280                 adapter->state = VNIC_CLOSED;
1281                 return 0;
1282         }
1283
1284         mutex_lock(&adapter->reset_lock);
1285         rc = __ibmvnic_close(netdev);
1286         ibmvnic_cleanup(netdev);
1287         mutex_unlock(&adapter->reset_lock);
1288
1289         return rc;
1290 }
1291
1292 /**
1293  * build_hdr_data - creates L2/L3/L4 header data buffer
1294  * @hdr_field - bitfield determining needed headers
1295  * @skb - socket buffer
1296  * @hdr_len - array of header lengths
1297  * @tot_len - total length of data
1298  *
1299  * Reads hdr_field to determine which headers are needed by firmware.
1300  * Builds a buffer containing these headers.  Saves individual header
1301  * lengths and total buffer length to be used to build descriptors.
1302  */
1303 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1304                           int *hdr_len, u8 *hdr_data)
1305 {
1306         int len = 0;
1307         u8 *hdr;
1308
1309         if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
1310                 hdr_len[0] = sizeof(struct vlan_ethhdr);
1311         else
1312                 hdr_len[0] = sizeof(struct ethhdr);
1313
1314         if (skb->protocol == htons(ETH_P_IP)) {
1315                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1316                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1317                         hdr_len[2] = tcp_hdrlen(skb);
1318                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1319                         hdr_len[2] = sizeof(struct udphdr);
1320         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1321                 hdr_len[1] = sizeof(struct ipv6hdr);
1322                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1323                         hdr_len[2] = tcp_hdrlen(skb);
1324                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1325                         hdr_len[2] = sizeof(struct udphdr);
1326         } else if (skb->protocol == htons(ETH_P_ARP)) {
1327                 hdr_len[1] = arp_hdr_len(skb->dev);
1328                 hdr_len[2] = 0;
1329         }
1330
1331         memset(hdr_data, 0, 120);
1332         if ((hdr_field >> 6) & 1) {
1333                 hdr = skb_mac_header(skb);
1334                 memcpy(hdr_data, hdr, hdr_len[0]);
1335                 len += hdr_len[0];
1336         }
1337
1338         if ((hdr_field >> 5) & 1) {
1339                 hdr = skb_network_header(skb);
1340                 memcpy(hdr_data + len, hdr, hdr_len[1]);
1341                 len += hdr_len[1];
1342         }
1343
1344         if ((hdr_field >> 4) & 1) {
1345                 hdr = skb_transport_header(skb);
1346                 memcpy(hdr_data + len, hdr, hdr_len[2]);
1347                 len += hdr_len[2];
1348         }
1349         return len;
1350 }
1351
1352 /**
1353  * create_hdr_descs - create header and header extension descriptors
1354  * @hdr_field - bitfield determining needed headers
1355  * @data - buffer containing header data
1356  * @len - length of data buffer
1357  * @hdr_len - array of individual header lengths
1358  * @scrq_arr - descriptor array
1359  *
1360  * Creates header and, if needed, header extension descriptors and
1361  * places them in a descriptor array, scrq_arr
1362  */
1363
1364 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1365                             union sub_crq *scrq_arr)
1366 {
1367         union sub_crq hdr_desc;
1368         int tmp_len = len;
1369         int num_descs = 0;
1370         u8 *data, *cur;
1371         int tmp;
1372
1373         while (tmp_len > 0) {
1374                 cur = hdr_data + len - tmp_len;
1375
1376                 memset(&hdr_desc, 0, sizeof(hdr_desc));
1377                 if (cur != hdr_data) {
1378                         data = hdr_desc.hdr_ext.data;
1379                         tmp = tmp_len > 29 ? 29 : tmp_len;
1380                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1381                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1382                         hdr_desc.hdr_ext.len = tmp;
1383                 } else {
1384                         data = hdr_desc.hdr.data;
1385                         tmp = tmp_len > 24 ? 24 : tmp_len;
1386                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1387                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1388                         hdr_desc.hdr.len = tmp;
1389                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1390                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1391                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1392                         hdr_desc.hdr.flag = hdr_field << 1;
1393                 }
1394                 memcpy(data, cur, tmp);
1395                 tmp_len -= tmp;
1396                 *scrq_arr = hdr_desc;
1397                 scrq_arr++;
1398                 num_descs++;
1399         }
1400
1401         return num_descs;
1402 }
1403
1404 /**
1405  * build_hdr_descs_arr - build a header descriptor array
1406  * @skb - socket buffer
1407  * @num_entries - number of descriptors to be sent
1408  * @subcrq - first TX descriptor
1409  * @hdr_field - bit field determining which headers will be sent
1410  *
1411  * This function will build a TX descriptor array with applicable
1412  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1413  */
1414
1415 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1416                                 int *num_entries, u8 hdr_field)
1417 {
1418         int hdr_len[3] = {0, 0, 0};
1419         int tot_len;
1420         u8 *hdr_data = txbuff->hdr_data;
1421
1422         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1423                                  txbuff->hdr_data);
1424         *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1425                          txbuff->indir_arr + 1);
1426 }
1427
1428 static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
1429                                     struct net_device *netdev)
1430 {
1431         /* For some backing devices, mishandling of small packets
1432          * can result in a loss of connection or TX stall. Device
1433          * architects recommend that no packet should be smaller
1434          * than the minimum MTU value provided to the driver, so
1435          * pad any packets to that length
1436          */
1437         if (skb->len < netdev->min_mtu)
1438                 return skb_put_padto(skb, netdev->min_mtu);
1439
1440         return 0;
1441 }
1442
1443 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1444 {
1445         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1446         int queue_num = skb_get_queue_mapping(skb);
1447         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1448         struct device *dev = &adapter->vdev->dev;
1449         struct ibmvnic_tx_buff *tx_buff = NULL;
1450         struct ibmvnic_sub_crq_queue *tx_scrq;
1451         struct ibmvnic_tx_pool *tx_pool;
1452         unsigned int tx_send_failed = 0;
1453         unsigned int tx_map_failed = 0;
1454         unsigned int tx_dropped = 0;
1455         unsigned int tx_packets = 0;
1456         unsigned int tx_bytes = 0;
1457         dma_addr_t data_dma_addr;
1458         struct netdev_queue *txq;
1459         unsigned long lpar_rc;
1460         union sub_crq tx_crq;
1461         unsigned int offset;
1462         int num_entries = 1;
1463         unsigned char *dst;
1464         u64 *handle_array;
1465         int index = 0;
1466         u8 proto = 0;
1467         int ret = 0;
1468
1469         if (adapter->resetting) {
1470                 if (!netif_subqueue_stopped(netdev, skb))
1471                         netif_stop_subqueue(netdev, queue_num);
1472                 dev_kfree_skb_any(skb);
1473
1474                 tx_send_failed++;
1475                 tx_dropped++;
1476                 ret = NETDEV_TX_OK;
1477                 goto out;
1478         }
1479
1480         if (ibmvnic_xmit_workarounds(skb, netdev)) {
1481                 tx_dropped++;
1482                 tx_send_failed++;
1483                 ret = NETDEV_TX_OK;
1484                 goto out;
1485         }
1486         if (skb_is_gso(skb))
1487                 tx_pool = &adapter->tso_pool[queue_num];
1488         else
1489                 tx_pool = &adapter->tx_pool[queue_num];
1490
1491         tx_scrq = adapter->tx_scrq[queue_num];
1492         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1493         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1494                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1495
1496         index = tx_pool->free_map[tx_pool->consumer_index];
1497
1498         if (index == IBMVNIC_INVALID_MAP) {
1499                 dev_kfree_skb_any(skb);
1500                 tx_send_failed++;
1501                 tx_dropped++;
1502                 ret = NETDEV_TX_OK;
1503                 goto out;
1504         }
1505
1506         tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
1507
1508         offset = index * tx_pool->buf_size;
1509         dst = tx_pool->long_term_buff.buff + offset;
1510         memset(dst, 0, tx_pool->buf_size);
1511         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1512
1513         if (skb_shinfo(skb)->nr_frags) {
1514                 int cur, i;
1515
1516                 /* Copy the head */
1517                 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1518                 cur = skb_headlen(skb);
1519
1520                 /* Copy the frags */
1521                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1522                         const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1523
1524                         memcpy(dst + cur,
1525                                page_address(skb_frag_page(frag)) +
1526                                frag->page_offset, skb_frag_size(frag));
1527                         cur += skb_frag_size(frag);
1528                 }
1529         } else {
1530                 skb_copy_from_linear_data(skb, dst, skb->len);
1531         }
1532
1533         tx_pool->consumer_index =
1534             (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
1535
1536         tx_buff = &tx_pool->tx_buff[index];
1537         tx_buff->skb = skb;
1538         tx_buff->data_dma[0] = data_dma_addr;
1539         tx_buff->data_len[0] = skb->len;
1540         tx_buff->index = index;
1541         tx_buff->pool_index = queue_num;
1542         tx_buff->last_frag = true;
1543
1544         memset(&tx_crq, 0, sizeof(tx_crq));
1545         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1546         tx_crq.v1.type = IBMVNIC_TX_DESC;
1547         tx_crq.v1.n_crq_elem = 1;
1548         tx_crq.v1.n_sge = 1;
1549         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1550
1551         if (skb_is_gso(skb))
1552                 tx_crq.v1.correlator =
1553                         cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
1554         else
1555                 tx_crq.v1.correlator = cpu_to_be32(index);
1556         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1557         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1558         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1559
1560         if (adapter->vlan_header_insertion) {
1561                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1562                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1563         }
1564
1565         if (skb->protocol == htons(ETH_P_IP)) {
1566                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1567                 proto = ip_hdr(skb)->protocol;
1568         } else if (skb->protocol == htons(ETH_P_IPV6)) {
1569                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1570                 proto = ipv6_hdr(skb)->nexthdr;
1571         }
1572
1573         if (proto == IPPROTO_TCP)
1574                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1575         else if (proto == IPPROTO_UDP)
1576                 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1577
1578         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1579                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1580                 hdrs += 2;
1581         }
1582         if (skb_is_gso(skb)) {
1583                 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1584                 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1585                 hdrs += 2;
1586         }
1587         /* determine if l2/3/4 headers are sent to firmware */
1588         if ((*hdrs >> 7) & 1) {
1589                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1590                 tx_crq.v1.n_crq_elem = num_entries;
1591                 tx_buff->num_entries = num_entries;
1592                 tx_buff->indir_arr[0] = tx_crq;
1593                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1594                                                     sizeof(tx_buff->indir_arr),
1595                                                     DMA_TO_DEVICE);
1596                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1597                         dev_kfree_skb_any(skb);
1598                         tx_buff->skb = NULL;
1599                         if (!firmware_has_feature(FW_FEATURE_CMO))
1600                                 dev_err(dev, "tx: unable to map descriptor array\n");
1601                         tx_map_failed++;
1602                         tx_dropped++;
1603                         ret = NETDEV_TX_OK;
1604                         goto tx_err_out;
1605                 }
1606                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1607                                                (u64)tx_buff->indir_dma,
1608                                                (u64)num_entries);
1609         } else {
1610                 tx_buff->num_entries = num_entries;
1611                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1612                                       &tx_crq);
1613         }
1614         if (lpar_rc != H_SUCCESS) {
1615                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1616                 dev_kfree_skb_any(skb);
1617                 tx_buff->skb = NULL;
1618
1619                 if (lpar_rc == H_CLOSED || adapter->failover_pending) {
1620                         /* Disable TX and report carrier off if queue is closed
1621                          * or pending failover.
1622                          * Firmware guarantees that a signal will be sent to the
1623                          * driver, triggering a reset or some other action.
1624                          */
1625                         netif_tx_stop_all_queues(netdev);
1626                         netif_carrier_off(netdev);
1627                 }
1628
1629                 tx_send_failed++;
1630                 tx_dropped++;
1631                 ret = NETDEV_TX_OK;
1632                 goto tx_err_out;
1633         }
1634
1635         if (atomic_add_return(num_entries, &tx_scrq->used)
1636                                         >= adapter->req_tx_entries_per_subcrq) {
1637                 netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
1638                 netif_stop_subqueue(netdev, queue_num);
1639         }
1640
1641         tx_packets++;
1642         tx_bytes += skb->len;
1643         txq->trans_start = jiffies;
1644         ret = NETDEV_TX_OK;
1645         goto out;
1646
1647 tx_err_out:
1648         /* roll back consumer index and map array*/
1649         if (tx_pool->consumer_index == 0)
1650                 tx_pool->consumer_index =
1651                         tx_pool->num_buffers - 1;
1652         else
1653                 tx_pool->consumer_index--;
1654         tx_pool->free_map[tx_pool->consumer_index] = index;
1655 out:
1656         netdev->stats.tx_dropped += tx_dropped;
1657         netdev->stats.tx_bytes += tx_bytes;
1658         netdev->stats.tx_packets += tx_packets;
1659         adapter->tx_send_failed += tx_send_failed;
1660         adapter->tx_map_failed += tx_map_failed;
1661         adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1662         adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1663         adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1664
1665         return ret;
1666 }
1667
1668 static void ibmvnic_set_multi(struct net_device *netdev)
1669 {
1670         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1671         struct netdev_hw_addr *ha;
1672         union ibmvnic_crq crq;
1673
1674         memset(&crq, 0, sizeof(crq));
1675         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1676         crq.request_capability.cmd = REQUEST_CAPABILITY;
1677
1678         if (netdev->flags & IFF_PROMISC) {
1679                 if (!adapter->promisc_supported)
1680                         return;
1681         } else {
1682                 if (netdev->flags & IFF_ALLMULTI) {
1683                         /* Accept all multicast */
1684                         memset(&crq, 0, sizeof(crq));
1685                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1686                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1687                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1688                         ibmvnic_send_crq(adapter, &crq);
1689                 } else if (netdev_mc_empty(netdev)) {
1690                         /* Reject all multicast */
1691                         memset(&crq, 0, sizeof(crq));
1692                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1693                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1694                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1695                         ibmvnic_send_crq(adapter, &crq);
1696                 } else {
1697                         /* Accept one or more multicast(s) */
1698                         netdev_for_each_mc_addr(ha, netdev) {
1699                                 memset(&crq, 0, sizeof(crq));
1700                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1701                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1702                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1703                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1704                                                 ha->addr);
1705                                 ibmvnic_send_crq(adapter, &crq);
1706                         }
1707                 }
1708         }
1709 }
1710
1711 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1712 {
1713         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1714         struct sockaddr *addr = p;
1715         union ibmvnic_crq crq;
1716         int rc;
1717
1718         if (!is_valid_ether_addr(addr->sa_data))
1719                 return -EADDRNOTAVAIL;
1720
1721         memset(&crq, 0, sizeof(crq));
1722         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1723         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1724         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1725
1726         init_completion(&adapter->fw_done);
1727         rc = ibmvnic_send_crq(adapter, &crq);
1728         if (rc)
1729                 return rc;
1730         wait_for_completion(&adapter->fw_done);
1731         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1732         return adapter->fw_done_rc ? -EIO : 0;
1733 }
1734
1735 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1736 {
1737         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1738         struct sockaddr *addr = p;
1739         int rc;
1740
1741         if (adapter->state == VNIC_PROBED) {
1742                 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1743                 adapter->mac_change_pending = true;
1744                 return 0;
1745         }
1746
1747         rc = __ibmvnic_set_mac(netdev, addr);
1748
1749         return rc;
1750 }
1751
1752 /**
1753  * do_reset returns zero if we are able to keep processing reset events, or
1754  * non-zero if we hit a fatal error and must halt.
1755  */
1756 static int do_reset(struct ibmvnic_adapter *adapter,
1757                     struct ibmvnic_rwi *rwi, u32 reset_state)
1758 {
1759         u64 old_num_rx_queues, old_num_tx_queues;
1760         struct net_device *netdev = adapter->netdev;
1761         int i, rc;
1762
1763         netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1764                    rwi->reset_reason);
1765
1766         netif_carrier_off(netdev);
1767         adapter->reset_reason = rwi->reset_reason;
1768
1769         old_num_rx_queues = adapter->req_rx_queues;
1770         old_num_tx_queues = adapter->req_tx_queues;
1771
1772         ibmvnic_cleanup(netdev);
1773
1774         if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
1775             adapter->reset_reason != VNIC_RESET_FAILOVER) {
1776                 rc = __ibmvnic_close(netdev);
1777                 if (rc)
1778                         return rc;
1779         }
1780
1781         if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1782             adapter->wait_for_reset) {
1783                 release_resources(adapter);
1784                 release_sub_crqs(adapter, 1);
1785                 release_crq_queue(adapter);
1786         }
1787
1788         if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1789                 /* remove the closed state so when we call open it appears
1790                  * we are coming from the probed state.
1791                  */
1792                 adapter->state = VNIC_PROBED;
1793
1794                 if (adapter->wait_for_reset) {
1795                         rc = init_crq_queue(adapter);
1796                 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
1797                         rc = ibmvnic_reenable_crq_queue(adapter);
1798                         release_sub_crqs(adapter, 1);
1799                 } else {
1800                         rc = ibmvnic_reset_crq(adapter);
1801                         if (!rc)
1802                                 rc = vio_enable_interrupts(adapter->vdev);
1803                 }
1804
1805                 if (rc) {
1806                         netdev_err(adapter->netdev,
1807                                    "Couldn't initialize crq. rc=%d\n", rc);
1808                         return rc;
1809                 }
1810
1811                 rc = ibmvnic_reset_init(adapter);
1812                 if (rc)
1813                         return IBMVNIC_INIT_FAILED;
1814
1815                 /* If the adapter was in PROBE state prior to the reset,
1816                  * exit here.
1817                  */
1818                 if (reset_state == VNIC_PROBED)
1819                         return 0;
1820
1821                 rc = ibmvnic_login(netdev);
1822                 if (rc) {
1823                         adapter->state = VNIC_PROBED;
1824                         return 0;
1825                 }
1826
1827                 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1828                     adapter->wait_for_reset) {
1829                         rc = init_resources(adapter);
1830                         if (rc)
1831                                 return rc;
1832                 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1833                            adapter->req_tx_queues != old_num_tx_queues) {
1834                         adapter->map_id = 1;
1835                         release_rx_pools(adapter);
1836                         release_tx_pools(adapter);
1837                         init_rx_pools(netdev);
1838                         init_tx_pools(netdev);
1839
1840                         release_napi(adapter);
1841                         init_napi(adapter);
1842                 } else {
1843                         rc = reset_tx_pools(adapter);
1844                         if (rc)
1845                                 return rc;
1846
1847                         rc = reset_rx_pools(adapter);
1848                         if (rc)
1849                                 return rc;
1850                 }
1851                 ibmvnic_disable_irqs(adapter);
1852         }
1853         adapter->state = VNIC_CLOSED;
1854
1855         if (reset_state == VNIC_CLOSED)
1856                 return 0;
1857
1858         rc = __ibmvnic_open(netdev);
1859         if (rc) {
1860                 if (list_empty(&adapter->rwi_list))
1861                         adapter->state = VNIC_CLOSED;
1862                 else
1863                         adapter->state = reset_state;
1864
1865                 return 0;
1866         }
1867
1868         /* kick napi */
1869         for (i = 0; i < adapter->req_rx_queues; i++)
1870                 napi_schedule(&adapter->napi[i]);
1871
1872         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
1873             adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
1874                 netdev_notify_peers(netdev);
1875
1876         netif_carrier_on(netdev);
1877
1878         return 0;
1879 }
1880
1881 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1882 {
1883         struct ibmvnic_rwi *rwi;
1884
1885         mutex_lock(&adapter->rwi_lock);
1886
1887         if (!list_empty(&adapter->rwi_list)) {
1888                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1889                                        list);
1890                 list_del(&rwi->list);
1891         } else {
1892                 rwi = NULL;
1893         }
1894
1895         mutex_unlock(&adapter->rwi_lock);
1896         return rwi;
1897 }
1898
1899 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1900 {
1901         struct ibmvnic_rwi *rwi;
1902
1903         rwi = get_next_rwi(adapter);
1904         while (rwi) {
1905                 kfree(rwi);
1906                 rwi = get_next_rwi(adapter);
1907         }
1908 }
1909
1910 static void __ibmvnic_reset(struct work_struct *work)
1911 {
1912         struct ibmvnic_rwi *rwi;
1913         struct ibmvnic_adapter *adapter;
1914         struct net_device *netdev;
1915         u32 reset_state;
1916         int rc = 0;
1917
1918         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1919         netdev = adapter->netdev;
1920
1921         mutex_lock(&adapter->reset_lock);
1922         adapter->resetting = true;
1923         reset_state = adapter->state;
1924
1925         rwi = get_next_rwi(adapter);
1926         while (rwi) {
1927                 rc = do_reset(adapter, rwi, reset_state);
1928                 kfree(rwi);
1929                 if (rc && rc != IBMVNIC_INIT_FAILED)
1930                         break;
1931
1932                 rwi = get_next_rwi(adapter);
1933         }
1934
1935         if (adapter->wait_for_reset) {
1936                 adapter->wait_for_reset = false;
1937                 adapter->reset_done_rc = rc;
1938                 complete(&adapter->reset_done);
1939         }
1940
1941         if (rc) {
1942                 netdev_dbg(adapter->netdev, "Reset failed\n");
1943                 free_all_rwi(adapter);
1944                 mutex_unlock(&adapter->reset_lock);
1945                 return;
1946         }
1947
1948         adapter->resetting = false;
1949         mutex_unlock(&adapter->reset_lock);
1950 }
1951
1952 static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
1953                          enum ibmvnic_reset_reason reason)
1954 {
1955         struct ibmvnic_rwi *rwi, *tmp;
1956         struct net_device *netdev = adapter->netdev;
1957         struct list_head *entry;
1958         int ret;
1959
1960         if (adapter->state == VNIC_REMOVING ||
1961             adapter->state == VNIC_REMOVED ||
1962             adapter->failover_pending) {
1963                 ret = EBUSY;
1964                 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
1965                 goto err;
1966         }
1967
1968         if (adapter->state == VNIC_PROBING) {
1969                 netdev_warn(netdev, "Adapter reset during probe\n");
1970                 ret = adapter->init_done_rc = EAGAIN;
1971                 goto err;
1972         }
1973
1974         mutex_lock(&adapter->rwi_lock);
1975
1976         list_for_each(entry, &adapter->rwi_list) {
1977                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1978                 if (tmp->reset_reason == reason) {
1979                         netdev_dbg(netdev, "Skipping matching reset\n");
1980                         mutex_unlock(&adapter->rwi_lock);
1981                         ret = EBUSY;
1982                         goto err;
1983                 }
1984         }
1985
1986         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1987         if (!rwi) {
1988                 mutex_unlock(&adapter->rwi_lock);
1989                 ibmvnic_close(netdev);
1990                 ret = ENOMEM;
1991                 goto err;
1992         }
1993
1994         rwi->reset_reason = reason;
1995         list_add_tail(&rwi->list, &adapter->rwi_list);
1996         mutex_unlock(&adapter->rwi_lock);
1997
1998         netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1999         schedule_work(&adapter->ibmvnic_reset);
2000
2001         return 0;
2002 err:
2003         if (adapter->wait_for_reset)
2004                 adapter->wait_for_reset = false;
2005         return -ret;
2006 }
2007
2008 static void ibmvnic_tx_timeout(struct net_device *dev)
2009 {
2010         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2011
2012         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
2013 }
2014
2015 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
2016                                   struct ibmvnic_rx_buff *rx_buff)
2017 {
2018         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
2019
2020         rx_buff->skb = NULL;
2021
2022         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
2023         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
2024
2025         atomic_dec(&pool->available);
2026 }
2027
2028 static int ibmvnic_poll(struct napi_struct *napi, int budget)
2029 {
2030         struct net_device *netdev = napi->dev;
2031         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2032         int scrq_num = (int)(napi - adapter->napi);
2033         int frames_processed = 0;
2034
2035 restart_poll:
2036         while (frames_processed < budget) {
2037                 struct sk_buff *skb;
2038                 struct ibmvnic_rx_buff *rx_buff;
2039                 union sub_crq *next;
2040                 u32 length;
2041                 u16 offset;
2042                 u8 flags = 0;
2043
2044                 if (unlikely(adapter->resetting &&
2045                              adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
2046                         enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2047                         napi_complete_done(napi, frames_processed);
2048                         return frames_processed;
2049                 }
2050
2051                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
2052                         break;
2053                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
2054                 rx_buff =
2055                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
2056                                                           rx_comp.correlator);
2057                 /* do error checking */
2058                 if (next->rx_comp.rc) {
2059                         netdev_dbg(netdev, "rx buffer returned with rc %x\n",
2060                                    be16_to_cpu(next->rx_comp.rc));
2061                         /* free the entry */
2062                         next->rx_comp.first = 0;
2063                         dev_kfree_skb_any(rx_buff->skb);
2064                         remove_buff_from_pool(adapter, rx_buff);
2065                         continue;
2066                 } else if (!rx_buff->skb) {
2067                         /* free the entry */
2068                         next->rx_comp.first = 0;
2069                         remove_buff_from_pool(adapter, rx_buff);
2070                         continue;
2071                 }
2072
2073                 length = be32_to_cpu(next->rx_comp.len);
2074                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
2075                 flags = next->rx_comp.flags;
2076                 skb = rx_buff->skb;
2077                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
2078                                         length);
2079
2080                 /* VLAN Header has been stripped by the system firmware and
2081                  * needs to be inserted by the driver
2082                  */
2083                 if (adapter->rx_vlan_header_insertion &&
2084                     (flags & IBMVNIC_VLAN_STRIPPED))
2085                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2086                                                ntohs(next->rx_comp.vlan_tci));
2087
2088                 /* free the entry */
2089                 next->rx_comp.first = 0;
2090                 remove_buff_from_pool(adapter, rx_buff);
2091
2092                 skb_put(skb, length);
2093                 skb->protocol = eth_type_trans(skb, netdev);
2094                 skb_record_rx_queue(skb, scrq_num);
2095
2096                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
2097                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
2098                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2099                 }
2100
2101                 length = skb->len;
2102                 napi_gro_receive(napi, skb); /* send it up */
2103                 netdev->stats.rx_packets++;
2104                 netdev->stats.rx_bytes += length;
2105                 adapter->rx_stats_buffers[scrq_num].packets++;
2106                 adapter->rx_stats_buffers[scrq_num].bytes += length;
2107                 frames_processed++;
2108         }
2109
2110         if (adapter->state != VNIC_CLOSING)
2111                 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
2112
2113         if (frames_processed < budget) {
2114                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2115                 napi_complete_done(napi, frames_processed);
2116                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
2117                     napi_reschedule(napi)) {
2118                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
2119                         goto restart_poll;
2120                 }
2121         }
2122         return frames_processed;
2123 }
2124
2125 #ifdef CONFIG_NET_POLL_CONTROLLER
2126 static void ibmvnic_netpoll_controller(struct net_device *dev)
2127 {
2128         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2129         int i;
2130
2131         replenish_pools(netdev_priv(dev));
2132         for (i = 0; i < adapter->req_rx_queues; i++)
2133                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
2134                                      adapter->rx_scrq[i]);
2135 }
2136 #endif
2137
2138 static int wait_for_reset(struct ibmvnic_adapter *adapter)
2139 {
2140         int rc, ret;
2141
2142         adapter->fallback.mtu = adapter->req_mtu;
2143         adapter->fallback.rx_queues = adapter->req_rx_queues;
2144         adapter->fallback.tx_queues = adapter->req_tx_queues;
2145         adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
2146         adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
2147
2148         init_completion(&adapter->reset_done);
2149         adapter->wait_for_reset = true;
2150         rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2151         if (rc)
2152                 return rc;
2153         wait_for_completion(&adapter->reset_done);
2154
2155         ret = 0;
2156         if (adapter->reset_done_rc) {
2157                 ret = -EIO;
2158                 adapter->desired.mtu = adapter->fallback.mtu;
2159                 adapter->desired.rx_queues = adapter->fallback.rx_queues;
2160                 adapter->desired.tx_queues = adapter->fallback.tx_queues;
2161                 adapter->desired.rx_entries = adapter->fallback.rx_entries;
2162                 adapter->desired.tx_entries = adapter->fallback.tx_entries;
2163
2164                 init_completion(&adapter->reset_done);
2165                 adapter->wait_for_reset = true;
2166                 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
2167                 if (rc)
2168                         return ret;
2169                 wait_for_completion(&adapter->reset_done);
2170         }
2171         adapter->wait_for_reset = false;
2172
2173         return ret;
2174 }
2175
2176 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
2177 {
2178         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2179
2180         adapter->desired.mtu = new_mtu + ETH_HLEN;
2181
2182         return wait_for_reset(adapter);
2183 }
2184
2185 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
2186                                                 struct net_device *dev,
2187                                                 netdev_features_t features)
2188 {
2189         /* Some backing hardware adapters can not
2190          * handle packets with a MSS less than 224
2191          * or with only one segment.
2192          */
2193         if (skb_is_gso(skb)) {
2194                 if (skb_shinfo(skb)->gso_size < 224 ||
2195                     skb_shinfo(skb)->gso_segs == 1)
2196                         features &= ~NETIF_F_GSO_MASK;
2197         }
2198
2199         return features;
2200 }
2201
2202 static const struct net_device_ops ibmvnic_netdev_ops = {
2203         .ndo_open               = ibmvnic_open,
2204         .ndo_stop               = ibmvnic_close,
2205         .ndo_start_xmit         = ibmvnic_xmit,
2206         .ndo_set_rx_mode        = ibmvnic_set_multi,
2207         .ndo_set_mac_address    = ibmvnic_set_mac,
2208         .ndo_validate_addr      = eth_validate_addr,
2209         .ndo_tx_timeout         = ibmvnic_tx_timeout,
2210 #ifdef CONFIG_NET_POLL_CONTROLLER
2211         .ndo_poll_controller    = ibmvnic_netpoll_controller,
2212 #endif
2213         .ndo_change_mtu         = ibmvnic_change_mtu,
2214         .ndo_features_check     = ibmvnic_features_check,
2215 };
2216
2217 /* ethtool functions */
2218
2219 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
2220                                       struct ethtool_link_ksettings *cmd)
2221 {
2222         u32 supported, advertising;
2223
2224         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
2225                           SUPPORTED_FIBRE);
2226         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
2227                             ADVERTISED_FIBRE);
2228         cmd->base.speed = SPEED_1000;
2229         cmd->base.duplex = DUPLEX_FULL;
2230         cmd->base.port = PORT_FIBRE;
2231         cmd->base.phy_address = 0;
2232         cmd->base.autoneg = AUTONEG_ENABLE;
2233
2234         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2235                                                 supported);
2236         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2237                                                 advertising);
2238
2239         return 0;
2240 }
2241
2242 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2243                                 struct ethtool_drvinfo *info)
2244 {
2245         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2246
2247         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2248         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2249         strlcpy(info->fw_version, adapter->fw_version,
2250                 sizeof(info->fw_version));
2251 }
2252
2253 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2254 {
2255         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2256
2257         return adapter->msg_enable;
2258 }
2259
2260 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2261 {
2262         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2263
2264         adapter->msg_enable = data;
2265 }
2266
2267 static u32 ibmvnic_get_link(struct net_device *netdev)
2268 {
2269         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2270
2271         /* Don't need to send a query because we request a logical link up at
2272          * init and then we wait for link state indications
2273          */
2274         return adapter->logical_link_state;
2275 }
2276
2277 static void ibmvnic_get_ringparam(struct net_device *netdev,
2278                                   struct ethtool_ringparam *ring)
2279 {
2280         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2281
2282         ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2283         ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2284         ring->rx_mini_max_pending = 0;
2285         ring->rx_jumbo_max_pending = 0;
2286         ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2287         ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2288         ring->rx_mini_pending = 0;
2289         ring->rx_jumbo_pending = 0;
2290 }
2291
2292 static int ibmvnic_set_ringparam(struct net_device *netdev,
2293                                  struct ethtool_ringparam *ring)
2294 {
2295         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2296
2297         if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
2298             ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2299                 netdev_err(netdev, "Invalid request.\n");
2300                 netdev_err(netdev, "Max tx buffers = %llu\n",
2301                            adapter->max_rx_add_entries_per_subcrq);
2302                 netdev_err(netdev, "Max rx buffers = %llu\n",
2303                            adapter->max_tx_entries_per_subcrq);
2304                 return -EINVAL;
2305         }
2306
2307         adapter->desired.rx_entries = ring->rx_pending;
2308         adapter->desired.tx_entries = ring->tx_pending;
2309
2310         return wait_for_reset(adapter);
2311 }
2312
2313 static void ibmvnic_get_channels(struct net_device *netdev,
2314                                  struct ethtool_channels *channels)
2315 {
2316         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2317
2318         channels->max_rx = adapter->max_rx_queues;
2319         channels->max_tx = adapter->max_tx_queues;
2320         channels->max_other = 0;
2321         channels->max_combined = 0;
2322         channels->rx_count = adapter->req_rx_queues;
2323         channels->tx_count = adapter->req_tx_queues;
2324         channels->other_count = 0;
2325         channels->combined_count = 0;
2326 }
2327
2328 static int ibmvnic_set_channels(struct net_device *netdev,
2329                                 struct ethtool_channels *channels)
2330 {
2331         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2332
2333         adapter->desired.rx_queues = channels->rx_count;
2334         adapter->desired.tx_queues = channels->tx_count;
2335
2336         return wait_for_reset(adapter);
2337 }
2338
2339 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2340 {
2341         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2342         int i;
2343
2344         if (stringset != ETH_SS_STATS)
2345                 return;
2346
2347         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2348                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2349
2350         for (i = 0; i < adapter->req_tx_queues; i++) {
2351                 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2352                 data += ETH_GSTRING_LEN;
2353
2354                 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2355                 data += ETH_GSTRING_LEN;
2356
2357                 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2358                 data += ETH_GSTRING_LEN;
2359         }
2360
2361         for (i = 0; i < adapter->req_rx_queues; i++) {
2362                 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2363                 data += ETH_GSTRING_LEN;
2364
2365                 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2366                 data += ETH_GSTRING_LEN;
2367
2368                 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2369                 data += ETH_GSTRING_LEN;
2370         }
2371 }
2372
2373 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2374 {
2375         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2376
2377         switch (sset) {
2378         case ETH_SS_STATS:
2379                 return ARRAY_SIZE(ibmvnic_stats) +
2380                        adapter->req_tx_queues * NUM_TX_STATS +
2381                        adapter->req_rx_queues * NUM_RX_STATS;
2382         default:
2383                 return -EOPNOTSUPP;
2384         }
2385 }
2386
2387 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2388                                       struct ethtool_stats *stats, u64 *data)
2389 {
2390         struct ibmvnic_adapter *adapter = netdev_priv(dev);
2391         union ibmvnic_crq crq;
2392         int i, j;
2393         int rc;
2394
2395         memset(&crq, 0, sizeof(crq));
2396         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2397         crq.request_statistics.cmd = REQUEST_STATISTICS;
2398         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2399         crq.request_statistics.len =
2400             cpu_to_be32(sizeof(struct ibmvnic_statistics));
2401
2402         /* Wait for data to be written */
2403         init_completion(&adapter->stats_done);
2404         rc = ibmvnic_send_crq(adapter, &crq);
2405         if (rc)
2406                 return;
2407         wait_for_completion(&adapter->stats_done);
2408
2409         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2410                 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2411                                                 ibmvnic_stats[i].offset));
2412
2413         for (j = 0; j < adapter->req_tx_queues; j++) {
2414                 data[i] = adapter->tx_stats_buffers[j].packets;
2415                 i++;
2416                 data[i] = adapter->tx_stats_buffers[j].bytes;
2417                 i++;
2418                 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2419                 i++;
2420         }
2421
2422         for (j = 0; j < adapter->req_rx_queues; j++) {
2423                 data[i] = adapter->rx_stats_buffers[j].packets;
2424                 i++;
2425                 data[i] = adapter->rx_stats_buffers[j].bytes;
2426                 i++;
2427                 data[i] = adapter->rx_stats_buffers[j].interrupts;
2428                 i++;
2429         }
2430 }
2431
2432 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2433         .get_drvinfo            = ibmvnic_get_drvinfo,
2434         .get_msglevel           = ibmvnic_get_msglevel,
2435         .set_msglevel           = ibmvnic_set_msglevel,
2436         .get_link               = ibmvnic_get_link,
2437         .get_ringparam          = ibmvnic_get_ringparam,
2438         .set_ringparam          = ibmvnic_set_ringparam,
2439         .get_channels           = ibmvnic_get_channels,
2440         .set_channels           = ibmvnic_set_channels,
2441         .get_strings            = ibmvnic_get_strings,
2442         .get_sset_count         = ibmvnic_get_sset_count,
2443         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
2444         .get_link_ksettings     = ibmvnic_get_link_ksettings,
2445 };
2446
2447 /* Routines for managing CRQs/sCRQs  */
2448
2449 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2450                                    struct ibmvnic_sub_crq_queue *scrq)
2451 {
2452         int rc;
2453
2454         if (scrq->irq) {
2455                 free_irq(scrq->irq, scrq);
2456                 irq_dispose_mapping(scrq->irq);
2457                 scrq->irq = 0;
2458         }
2459
2460         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2461         atomic_set(&scrq->used, 0);
2462         scrq->cur = 0;
2463
2464         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2465                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2466         return rc;
2467 }
2468
2469 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2470 {
2471         int i, rc;
2472
2473         for (i = 0; i < adapter->req_tx_queues; i++) {
2474                 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2475                 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2476                 if (rc)
2477                         return rc;
2478         }
2479
2480         for (i = 0; i < adapter->req_rx_queues; i++) {
2481                 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2482                 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2483                 if (rc)
2484                         return rc;
2485         }
2486
2487         return rc;
2488 }
2489
2490 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2491                                   struct ibmvnic_sub_crq_queue *scrq,
2492                                   bool do_h_free)
2493 {
2494         struct device *dev = &adapter->vdev->dev;
2495         long rc;
2496
2497         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2498
2499         if (do_h_free) {
2500                 /* Close the sub-crqs */
2501                 do {
2502                         rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2503                                                 adapter->vdev->unit_address,
2504                                                 scrq->crq_num);
2505                 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2506
2507                 if (rc) {
2508                         netdev_err(adapter->netdev,
2509                                    "Failed to release sub-CRQ %16lx, rc = %ld\n",
2510                                    scrq->crq_num, rc);
2511                 }
2512         }
2513
2514         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2515                          DMA_BIDIRECTIONAL);
2516         free_pages((unsigned long)scrq->msgs, 2);
2517         kfree(scrq);
2518 }
2519
2520 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2521                                                         *adapter)
2522 {
2523         struct device *dev = &adapter->vdev->dev;
2524         struct ibmvnic_sub_crq_queue *scrq;
2525         int rc;
2526
2527         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2528         if (!scrq)
2529                 return NULL;
2530
2531         scrq->msgs =
2532                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2533         if (!scrq->msgs) {
2534                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2535                 goto zero_page_failed;
2536         }
2537
2538         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2539                                          DMA_BIDIRECTIONAL);
2540         if (dma_mapping_error(dev, scrq->msg_token)) {
2541                 dev_warn(dev, "Couldn't map crq queue messages page\n");
2542                 goto map_failed;
2543         }
2544
2545         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2546                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2547
2548         if (rc == H_RESOURCE)
2549                 rc = ibmvnic_reset_crq(adapter);
2550
2551         if (rc == H_CLOSED) {
2552                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2553         } else if (rc) {
2554                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2555                 goto reg_failed;
2556         }
2557
2558         scrq->adapter = adapter;
2559         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2560         spin_lock_init(&scrq->lock);
2561
2562         netdev_dbg(adapter->netdev,
2563                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2564                    scrq->crq_num, scrq->hw_irq, scrq->irq);
2565
2566         return scrq;
2567
2568 reg_failed:
2569         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2570                          DMA_BIDIRECTIONAL);
2571 map_failed:
2572         free_pages((unsigned long)scrq->msgs, 2);
2573 zero_page_failed:
2574         kfree(scrq);
2575
2576         return NULL;
2577 }
2578
2579 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
2580 {
2581         int i;
2582
2583         if (adapter->tx_scrq) {
2584                 for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
2585                         if (!adapter->tx_scrq[i])
2586                                 continue;
2587
2588                         netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2589                                    i);
2590                         if (adapter->tx_scrq[i]->irq) {
2591                                 free_irq(adapter->tx_scrq[i]->irq,
2592                                          adapter->tx_scrq[i]);
2593                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2594                                 adapter->tx_scrq[i]->irq = 0;
2595                         }
2596
2597                         release_sub_crq_queue(adapter, adapter->tx_scrq[i],
2598                                               do_h_free);
2599                 }
2600
2601                 kfree(adapter->tx_scrq);
2602                 adapter->tx_scrq = NULL;
2603                 adapter->num_active_tx_scrqs = 0;
2604         }
2605
2606         if (adapter->rx_scrq) {
2607                 for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
2608                         if (!adapter->rx_scrq[i])
2609                                 continue;
2610
2611                         netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2612                                    i);
2613                         if (adapter->rx_scrq[i]->irq) {
2614                                 free_irq(adapter->rx_scrq[i]->irq,
2615                                          adapter->rx_scrq[i]);
2616                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2617                                 adapter->rx_scrq[i]->irq = 0;
2618                         }
2619
2620                         release_sub_crq_queue(adapter, adapter->rx_scrq[i],
2621                                               do_h_free);
2622                 }
2623
2624                 kfree(adapter->rx_scrq);
2625                 adapter->rx_scrq = NULL;
2626                 adapter->num_active_rx_scrqs = 0;
2627         }
2628 }
2629
2630 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2631                             struct ibmvnic_sub_crq_queue *scrq)
2632 {
2633         struct device *dev = &adapter->vdev->dev;
2634         unsigned long rc;
2635
2636         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2637                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2638         if (rc)
2639                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2640                         scrq->hw_irq, rc);
2641         return rc;
2642 }
2643
2644 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2645                            struct ibmvnic_sub_crq_queue *scrq)
2646 {
2647         struct device *dev = &adapter->vdev->dev;
2648         unsigned long rc;
2649         u64 val;
2650
2651         if (scrq->hw_irq > 0x100000000ULL) {
2652                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2653                 return 1;
2654         }
2655
2656         val = (0xff000000) | scrq->hw_irq;
2657         rc = plpar_hcall_norets(H_EOI, val);
2658         if (rc)
2659                 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
2660                         val, rc);
2661
2662         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2663                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2664         if (rc)
2665                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2666                         scrq->hw_irq, rc);
2667         return rc;
2668 }
2669
2670 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2671                                struct ibmvnic_sub_crq_queue *scrq)
2672 {
2673         struct device *dev = &adapter->vdev->dev;
2674         struct ibmvnic_tx_pool *tx_pool;
2675         struct ibmvnic_tx_buff *txbuff;
2676         union sub_crq *next;
2677         int index;
2678         int i, j;
2679         u8 *first;
2680
2681 restart_loop:
2682         while (pending_scrq(adapter, scrq)) {
2683                 unsigned int pool = scrq->pool_index;
2684                 int num_entries = 0;
2685
2686                 next = ibmvnic_next_scrq(adapter, scrq);
2687                 for (i = 0; i < next->tx_comp.num_comps; i++) {
2688                         if (next->tx_comp.rcs[i]) {
2689                                 dev_err(dev, "tx error %x\n",
2690                                         next->tx_comp.rcs[i]);
2691                                 continue;
2692                         }
2693                         index = be32_to_cpu(next->tx_comp.correlators[i]);
2694                         if (index & IBMVNIC_TSO_POOL_MASK) {
2695                                 tx_pool = &adapter->tso_pool[pool];
2696                                 index &= ~IBMVNIC_TSO_POOL_MASK;
2697                         } else {
2698                                 tx_pool = &adapter->tx_pool[pool];
2699                         }
2700
2701                         txbuff = &tx_pool->tx_buff[index];
2702
2703                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2704                                 if (!txbuff->data_dma[j])
2705                                         continue;
2706
2707                                 txbuff->data_dma[j] = 0;
2708                         }
2709                         /* if sub_crq was sent indirectly */
2710                         first = &txbuff->indir_arr[0].generic.first;
2711                         if (*first == IBMVNIC_CRQ_CMD) {
2712                                 dma_unmap_single(dev, txbuff->indir_dma,
2713                                                  sizeof(txbuff->indir_arr),
2714                                                  DMA_TO_DEVICE);
2715                                 *first = 0;
2716                         }
2717
2718                         if (txbuff->last_frag) {
2719                                 dev_kfree_skb_any(txbuff->skb);
2720                                 txbuff->skb = NULL;
2721                         }
2722
2723                         num_entries += txbuff->num_entries;
2724
2725                         tx_pool->free_map[tx_pool->producer_index] = index;
2726                         tx_pool->producer_index =
2727                                 (tx_pool->producer_index + 1) %
2728                                         tx_pool->num_buffers;
2729                 }
2730                 /* remove tx_comp scrq*/
2731                 next->tx_comp.first = 0;
2732
2733                 if (atomic_sub_return(num_entries, &scrq->used) <=
2734                     (adapter->req_tx_entries_per_subcrq / 2) &&
2735                     __netif_subqueue_stopped(adapter->netdev,
2736                                              scrq->pool_index)) {
2737                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2738                         netdev_dbg(adapter->netdev, "Started queue %d\n",
2739                                    scrq->pool_index);
2740                 }
2741         }
2742
2743         enable_scrq_irq(adapter, scrq);
2744
2745         if (pending_scrq(adapter, scrq)) {
2746                 disable_scrq_irq(adapter, scrq);
2747                 goto restart_loop;
2748         }
2749
2750         return 0;
2751 }
2752
2753 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2754 {
2755         struct ibmvnic_sub_crq_queue *scrq = instance;
2756         struct ibmvnic_adapter *adapter = scrq->adapter;
2757
2758         disable_scrq_irq(adapter, scrq);
2759         ibmvnic_complete_tx(adapter, scrq);
2760
2761         return IRQ_HANDLED;
2762 }
2763
2764 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2765 {
2766         struct ibmvnic_sub_crq_queue *scrq = instance;
2767         struct ibmvnic_adapter *adapter = scrq->adapter;
2768
2769         /* When booting a kdump kernel we can hit pending interrupts
2770          * prior to completing driver initialization.
2771          */
2772         if (unlikely(adapter->state != VNIC_OPEN))
2773                 return IRQ_NONE;
2774
2775         adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2776
2777         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2778                 disable_scrq_irq(adapter, scrq);
2779                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2780         }
2781
2782         return IRQ_HANDLED;
2783 }
2784
2785 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2786 {
2787         struct device *dev = &adapter->vdev->dev;
2788         struct ibmvnic_sub_crq_queue *scrq;
2789         int i = 0, j = 0;
2790         int rc = 0;
2791
2792         for (i = 0; i < adapter->req_tx_queues; i++) {
2793                 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2794                            i);
2795                 scrq = adapter->tx_scrq[i];
2796                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2797
2798                 if (!scrq->irq) {
2799                         rc = -EINVAL;
2800                         dev_err(dev, "Error mapping irq\n");
2801                         goto req_tx_irq_failed;
2802                 }
2803
2804                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2805                                  0, "ibmvnic_tx", scrq);
2806
2807                 if (rc) {
2808                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2809                                 scrq->irq, rc);
2810                         irq_dispose_mapping(scrq->irq);
2811                         goto req_tx_irq_failed;
2812                 }
2813         }
2814
2815         for (i = 0; i < adapter->req_rx_queues; i++) {
2816                 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2817                            i);
2818                 scrq = adapter->rx_scrq[i];
2819                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2820                 if (!scrq->irq) {
2821                         rc = -EINVAL;
2822                         dev_err(dev, "Error mapping irq\n");
2823                         goto req_rx_irq_failed;
2824                 }
2825                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2826                                  0, "ibmvnic_rx", scrq);
2827                 if (rc) {
2828                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2829                                 scrq->irq, rc);
2830                         irq_dispose_mapping(scrq->irq);
2831                         goto req_rx_irq_failed;
2832                 }
2833         }
2834         return rc;
2835
2836 req_rx_irq_failed:
2837         for (j = 0; j < i; j++) {
2838                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2839                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2840         }
2841         i = adapter->req_tx_queues;
2842 req_tx_irq_failed:
2843         for (j = 0; j < i; j++) {
2844                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2845                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2846         }
2847         release_sub_crqs(adapter, 1);
2848         return rc;
2849 }
2850
2851 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2852 {
2853         struct device *dev = &adapter->vdev->dev;
2854         struct ibmvnic_sub_crq_queue **allqueues;
2855         int registered_queues = 0;
2856         int total_queues;
2857         int more = 0;
2858         int i;
2859
2860         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2861
2862         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2863         if (!allqueues)
2864                 return -1;
2865
2866         for (i = 0; i < total_queues; i++) {
2867                 allqueues[i] = init_sub_crq_queue(adapter);
2868                 if (!allqueues[i]) {
2869                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2870                         break;
2871                 }
2872                 registered_queues++;
2873         }
2874
2875         /* Make sure we were able to register the minimum number of queues */
2876         if (registered_queues <
2877             adapter->min_tx_queues + adapter->min_rx_queues) {
2878                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
2879                 goto tx_failed;
2880         }
2881
2882         /* Distribute the failed allocated queues*/
2883         for (i = 0; i < total_queues - registered_queues + more ; i++) {
2884                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2885                 switch (i % 3) {
2886                 case 0:
2887                         if (adapter->req_rx_queues > adapter->min_rx_queues)
2888                                 adapter->req_rx_queues--;
2889                         else
2890                                 more++;
2891                         break;
2892                 case 1:
2893                         if (adapter->req_tx_queues > adapter->min_tx_queues)
2894                                 adapter->req_tx_queues--;
2895                         else
2896                                 more++;
2897                         break;
2898                 }
2899         }
2900
2901         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2902                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
2903         if (!adapter->tx_scrq)
2904                 goto tx_failed;
2905
2906         for (i = 0; i < adapter->req_tx_queues; i++) {
2907                 adapter->tx_scrq[i] = allqueues[i];
2908                 adapter->tx_scrq[i]->pool_index = i;
2909                 adapter->num_active_tx_scrqs++;
2910         }
2911
2912         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2913                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
2914         if (!adapter->rx_scrq)
2915                 goto rx_failed;
2916
2917         for (i = 0; i < adapter->req_rx_queues; i++) {
2918                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2919                 adapter->rx_scrq[i]->scrq_num = i;
2920                 adapter->num_active_rx_scrqs++;
2921         }
2922
2923         kfree(allqueues);
2924         return 0;
2925
2926 rx_failed:
2927         kfree(adapter->tx_scrq);
2928         adapter->tx_scrq = NULL;
2929 tx_failed:
2930         for (i = 0; i < registered_queues; i++)
2931                 release_sub_crq_queue(adapter, allqueues[i], 1);
2932         kfree(allqueues);
2933         return -1;
2934 }
2935
2936 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2937 {
2938         struct device *dev = &adapter->vdev->dev;
2939         union ibmvnic_crq crq;
2940         int max_entries;
2941
2942         if (!retry) {
2943                 /* Sub-CRQ entries are 32 byte long */
2944                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2945
2946                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2947                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2948                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2949                         return;
2950                 }
2951
2952                 if (adapter->desired.mtu)
2953                         adapter->req_mtu = adapter->desired.mtu;
2954                 else
2955                         adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2956
2957                 if (!adapter->desired.tx_entries)
2958                         adapter->desired.tx_entries =
2959                                         adapter->max_tx_entries_per_subcrq;
2960                 if (!adapter->desired.rx_entries)
2961                         adapter->desired.rx_entries =
2962                                         adapter->max_rx_add_entries_per_subcrq;
2963
2964                 max_entries = IBMVNIC_MAX_LTB_SIZE /
2965                               (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2966
2967                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2968                         adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2969                         adapter->desired.tx_entries = max_entries;
2970                 }
2971
2972                 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2973                         adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2974                         adapter->desired.rx_entries = max_entries;
2975                 }
2976
2977                 if (adapter->desired.tx_entries)
2978                         adapter->req_tx_entries_per_subcrq =
2979                                         adapter->desired.tx_entries;
2980                 else
2981                         adapter->req_tx_entries_per_subcrq =
2982                                         adapter->max_tx_entries_per_subcrq;
2983
2984                 if (adapter->desired.rx_entries)
2985                         adapter->req_rx_add_entries_per_subcrq =
2986                                         adapter->desired.rx_entries;
2987                 else
2988                         adapter->req_rx_add_entries_per_subcrq =
2989                                         adapter->max_rx_add_entries_per_subcrq;
2990
2991                 if (adapter->desired.tx_queues)
2992                         adapter->req_tx_queues =
2993                                         adapter->desired.tx_queues;
2994                 else
2995                         adapter->req_tx_queues =
2996                                         adapter->opt_tx_comp_sub_queues;
2997
2998                 if (adapter->desired.rx_queues)
2999                         adapter->req_rx_queues =
3000                                         adapter->desired.rx_queues;
3001                 else
3002                         adapter->req_rx_queues =
3003                                         adapter->opt_rx_comp_queues;
3004
3005                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
3006         }
3007
3008         memset(&crq, 0, sizeof(crq));
3009         crq.request_capability.first = IBMVNIC_CRQ_CMD;
3010         crq.request_capability.cmd = REQUEST_CAPABILITY;
3011
3012         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
3013         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
3014         atomic_inc(&adapter->running_cap_crqs);
3015         ibmvnic_send_crq(adapter, &crq);
3016
3017         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
3018         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
3019         atomic_inc(&adapter->running_cap_crqs);
3020         ibmvnic_send_crq(adapter, &crq);
3021
3022         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
3023         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
3024         atomic_inc(&adapter->running_cap_crqs);
3025         ibmvnic_send_crq(adapter, &crq);
3026
3027         crq.request_capability.capability =
3028             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
3029         crq.request_capability.number =
3030             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
3031         atomic_inc(&adapter->running_cap_crqs);
3032         ibmvnic_send_crq(adapter, &crq);
3033
3034         crq.request_capability.capability =
3035             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
3036         crq.request_capability.number =
3037             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
3038         atomic_inc(&adapter->running_cap_crqs);
3039         ibmvnic_send_crq(adapter, &crq);
3040
3041         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
3042         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
3043         atomic_inc(&adapter->running_cap_crqs);
3044         ibmvnic_send_crq(adapter, &crq);
3045
3046         if (adapter->netdev->flags & IFF_PROMISC) {
3047                 if (adapter->promisc_supported) {
3048                         crq.request_capability.capability =
3049                             cpu_to_be16(PROMISC_REQUESTED);
3050                         crq.request_capability.number = cpu_to_be64(1);
3051                         atomic_inc(&adapter->running_cap_crqs);
3052                         ibmvnic_send_crq(adapter, &crq);
3053                 }
3054         } else {
3055                 crq.request_capability.capability =
3056                     cpu_to_be16(PROMISC_REQUESTED);
3057                 crq.request_capability.number = cpu_to_be64(0);
3058                 atomic_inc(&adapter->running_cap_crqs);
3059                 ibmvnic_send_crq(adapter, &crq);
3060         }
3061 }
3062
3063 static int pending_scrq(struct ibmvnic_adapter *adapter,
3064                         struct ibmvnic_sub_crq_queue *scrq)
3065 {
3066         union sub_crq *entry = &scrq->msgs[scrq->cur];
3067
3068         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
3069                 return 1;
3070         else
3071                 return 0;
3072 }
3073
3074 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
3075                                         struct ibmvnic_sub_crq_queue *scrq)
3076 {
3077         union sub_crq *entry;
3078         unsigned long flags;
3079
3080         spin_lock_irqsave(&scrq->lock, flags);
3081         entry = &scrq->msgs[scrq->cur];
3082         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3083                 if (++scrq->cur == scrq->size)
3084                         scrq->cur = 0;
3085         } else {
3086                 entry = NULL;
3087         }
3088         spin_unlock_irqrestore(&scrq->lock, flags);
3089
3090         return entry;
3091 }
3092
3093 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
3094 {
3095         struct ibmvnic_crq_queue *queue = &adapter->crq;
3096         union ibmvnic_crq *crq;
3097
3098         crq = &queue->msgs[queue->cur];
3099         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
3100                 if (++queue->cur == queue->size)
3101                         queue->cur = 0;
3102         } else {
3103                 crq = NULL;
3104         }
3105
3106         return crq;
3107 }
3108
3109 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
3110                        union sub_crq *sub_crq)
3111 {
3112         unsigned int ua = adapter->vdev->unit_address;
3113         struct device *dev = &adapter->vdev->dev;
3114         u64 *u64_crq = (u64 *)sub_crq;
3115         int rc;
3116
3117         netdev_dbg(adapter->netdev,
3118                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
3119                    (unsigned long int)cpu_to_be64(remote_handle),
3120                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3121                    (unsigned long int)cpu_to_be64(u64_crq[1]),
3122                    (unsigned long int)cpu_to_be64(u64_crq[2]),
3123                    (unsigned long int)cpu_to_be64(u64_crq[3]));
3124
3125         /* Make sure the hypervisor sees the complete request */
3126         mb();
3127
3128         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
3129                                 cpu_to_be64(remote_handle),
3130                                 cpu_to_be64(u64_crq[0]),
3131                                 cpu_to_be64(u64_crq[1]),
3132                                 cpu_to_be64(u64_crq[2]),
3133                                 cpu_to_be64(u64_crq[3]));
3134
3135         if (rc) {
3136                 if (rc == H_CLOSED)
3137                         dev_warn(dev, "CRQ Queue closed\n");
3138                 dev_err(dev, "Send error (rc=%d)\n", rc);
3139         }
3140
3141         return rc;
3142 }
3143
3144 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
3145                                 u64 remote_handle, u64 ioba, u64 num_entries)
3146 {
3147         unsigned int ua = adapter->vdev->unit_address;
3148         struct device *dev = &adapter->vdev->dev;
3149         int rc;
3150
3151         /* Make sure the hypervisor sees the complete request */
3152         mb();
3153         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
3154                                 cpu_to_be64(remote_handle),
3155                                 ioba, num_entries);
3156
3157         if (rc) {
3158                 if (rc == H_CLOSED)
3159                         dev_warn(dev, "CRQ Queue closed\n");
3160                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
3161         }
3162
3163         return rc;
3164 }
3165
3166 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
3167                             union ibmvnic_crq *crq)
3168 {
3169         unsigned int ua = adapter->vdev->unit_address;
3170         struct device *dev = &adapter->vdev->dev;
3171         u64 *u64_crq = (u64 *)crq;
3172         int rc;
3173
3174         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
3175                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3176                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3177
3178         if (!adapter->crq.active &&
3179             crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
3180                 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
3181                 return -EINVAL;
3182         }
3183
3184         /* Make sure the hypervisor sees the complete request */
3185         mb();
3186
3187         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
3188                                 cpu_to_be64(u64_crq[0]),
3189                                 cpu_to_be64(u64_crq[1]));
3190
3191         if (rc) {
3192                 if (rc == H_CLOSED) {
3193                         dev_warn(dev, "CRQ Queue closed\n");
3194                         if (adapter->resetting)
3195                                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3196                 }
3197
3198                 dev_warn(dev, "Send error (rc=%d)\n", rc);
3199         }
3200
3201         return rc;
3202 }
3203
3204 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
3205 {
3206         union ibmvnic_crq crq;
3207
3208         memset(&crq, 0, sizeof(crq));
3209         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
3210         crq.generic.cmd = IBMVNIC_CRQ_INIT;
3211         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
3212
3213         return ibmvnic_send_crq(adapter, &crq);
3214 }
3215
3216 static int send_version_xchg(struct ibmvnic_adapter *adapter)
3217 {
3218         union ibmvnic_crq crq;
3219
3220         memset(&crq, 0, sizeof(crq));
3221         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
3222         crq.version_exchange.cmd = VERSION_EXCHANGE;
3223         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
3224
3225         return ibmvnic_send_crq(adapter, &crq);
3226 }
3227
3228 struct vnic_login_client_data {
3229         u8      type;
3230         __be16  len;
3231         char    name[];
3232 } __packed;
3233
3234 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
3235 {
3236         int len;
3237
3238         /* Calculate the amount of buffer space needed for the
3239          * vnic client data in the login buffer. There are four entries,
3240          * OS name, LPAR name, device name, and a null last entry.
3241          */
3242         len = 4 * sizeof(struct vnic_login_client_data);
3243         len += 6; /* "Linux" plus NULL */
3244         len += strlen(utsname()->nodename) + 1;
3245         len += strlen(adapter->netdev->name) + 1;
3246
3247         return len;
3248 }
3249
3250 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
3251                                  struct vnic_login_client_data *vlcd)
3252 {
3253         const char *os_name = "Linux";
3254         int len;
3255
3256         /* Type 1 - LPAR OS */
3257         vlcd->type = 1;
3258         len = strlen(os_name) + 1;
3259         vlcd->len = cpu_to_be16(len);
3260         strncpy(vlcd->name, os_name, len);
3261         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3262
3263         /* Type 2 - LPAR name */
3264         vlcd->type = 2;
3265         len = strlen(utsname()->nodename) + 1;
3266         vlcd->len = cpu_to_be16(len);
3267         strncpy(vlcd->name, utsname()->nodename, len);
3268         vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
3269
3270         /* Type 3 - device name */
3271         vlcd->type = 3;
3272         len = strlen(adapter->netdev->name) + 1;
3273         vlcd->len = cpu_to_be16(len);
3274         strncpy(vlcd->name, adapter->netdev->name, len);
3275 }
3276
3277 static int send_login(struct ibmvnic_adapter *adapter)
3278 {
3279         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3280         struct ibmvnic_login_buffer *login_buffer;
3281         struct device *dev = &adapter->vdev->dev;
3282         dma_addr_t rsp_buffer_token;
3283         dma_addr_t buffer_token;
3284         size_t rsp_buffer_size;
3285         union ibmvnic_crq crq;
3286         size_t buffer_size;
3287         __be64 *tx_list_p;
3288         __be64 *rx_list_p;
3289         int client_data_len;
3290         struct vnic_login_client_data *vlcd;
3291         int i;
3292
3293         if (!adapter->tx_scrq || !adapter->rx_scrq) {
3294                 netdev_err(adapter->netdev,
3295                            "RX or TX queues are not allocated, device login failed\n");
3296                 return -1;
3297         }
3298
3299         release_login_rsp_buffer(adapter);
3300         client_data_len = vnic_client_data_len(adapter);
3301
3302         buffer_size =
3303             sizeof(struct ibmvnic_login_buffer) +
3304             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3305             client_data_len;
3306
3307         login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3308         if (!login_buffer)
3309                 goto buf_alloc_failed;
3310
3311         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3312                                       DMA_TO_DEVICE);
3313         if (dma_mapping_error(dev, buffer_token)) {
3314                 dev_err(dev, "Couldn't map login buffer\n");
3315                 goto buf_map_failed;
3316         }
3317
3318         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3319                           sizeof(u64) * adapter->req_tx_queues +
3320                           sizeof(u64) * adapter->req_rx_queues +
3321                           sizeof(u64) * adapter->req_rx_queues +
3322                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3323
3324         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3325         if (!login_rsp_buffer)
3326                 goto buf_rsp_alloc_failed;
3327
3328         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3329                                           rsp_buffer_size, DMA_FROM_DEVICE);
3330         if (dma_mapping_error(dev, rsp_buffer_token)) {
3331                 dev_err(dev, "Couldn't map login rsp buffer\n");
3332                 goto buf_rsp_map_failed;
3333         }
3334
3335         adapter->login_buf = login_buffer;
3336         adapter->login_buf_token = buffer_token;
3337         adapter->login_buf_sz = buffer_size;
3338         adapter->login_rsp_buf = login_rsp_buffer;
3339         adapter->login_rsp_buf_token = rsp_buffer_token;
3340         adapter->login_rsp_buf_sz = rsp_buffer_size;
3341
3342         login_buffer->len = cpu_to_be32(buffer_size);
3343         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3344         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3345         login_buffer->off_txcomp_subcrqs =
3346             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3347         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3348         login_buffer->off_rxcomp_subcrqs =
3349             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3350                         sizeof(u64) * adapter->req_tx_queues);
3351         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3352         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3353
3354         tx_list_p = (__be64 *)((char *)login_buffer +
3355                                       sizeof(struct ibmvnic_login_buffer));
3356         rx_list_p = (__be64 *)((char *)login_buffer +
3357                                       sizeof(struct ibmvnic_login_buffer) +
3358                                       sizeof(u64) * adapter->req_tx_queues);
3359
3360         for (i = 0; i < adapter->req_tx_queues; i++) {
3361                 if (adapter->tx_scrq[i]) {
3362                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3363                                                    crq_num);
3364                 }
3365         }
3366
3367         for (i = 0; i < adapter->req_rx_queues; i++) {
3368                 if (adapter->rx_scrq[i]) {
3369                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3370                                                    crq_num);
3371                 }
3372         }
3373
3374         /* Insert vNIC login client data */
3375         vlcd = (struct vnic_login_client_data *)
3376                 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3377         login_buffer->client_data_offset =
3378                         cpu_to_be32((char *)vlcd - (char *)login_buffer);
3379         login_buffer->client_data_len = cpu_to_be32(client_data_len);
3380
3381         vnic_add_client_data(adapter, vlcd);
3382
3383         netdev_dbg(adapter->netdev, "Login Buffer:\n");
3384         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3385                 netdev_dbg(adapter->netdev, "%016lx\n",
3386                            ((unsigned long int *)(adapter->login_buf))[i]);
3387         }
3388
3389         memset(&crq, 0, sizeof(crq));
3390         crq.login.first = IBMVNIC_CRQ_CMD;
3391         crq.login.cmd = LOGIN;
3392         crq.login.ioba = cpu_to_be32(buffer_token);
3393         crq.login.len = cpu_to_be32(buffer_size);
3394         ibmvnic_send_crq(adapter, &crq);
3395
3396         return 0;
3397
3398 buf_rsp_map_failed:
3399         kfree(login_rsp_buffer);
3400 buf_rsp_alloc_failed:
3401         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3402 buf_map_failed:
3403         kfree(login_buffer);
3404 buf_alloc_failed:
3405         return -1;
3406 }
3407
3408 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3409                             u32 len, u8 map_id)
3410 {
3411         union ibmvnic_crq crq;
3412
3413         memset(&crq, 0, sizeof(crq));
3414         crq.request_map.first = IBMVNIC_CRQ_CMD;
3415         crq.request_map.cmd = REQUEST_MAP;
3416         crq.request_map.map_id = map_id;
3417         crq.request_map.ioba = cpu_to_be32(addr);
3418         crq.request_map.len = cpu_to_be32(len);
3419         return ibmvnic_send_crq(adapter, &crq);
3420 }
3421
3422 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3423 {
3424         union ibmvnic_crq crq;
3425
3426         memset(&crq, 0, sizeof(crq));
3427         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3428         crq.request_unmap.cmd = REQUEST_UNMAP;
3429         crq.request_unmap.map_id = map_id;
3430         return ibmvnic_send_crq(adapter, &crq);
3431 }
3432
3433 static void send_map_query(struct ibmvnic_adapter *adapter)
3434 {
3435         union ibmvnic_crq crq;
3436
3437         memset(&crq, 0, sizeof(crq));
3438         crq.query_map.first = IBMVNIC_CRQ_CMD;
3439         crq.query_map.cmd = QUERY_MAP;
3440         ibmvnic_send_crq(adapter, &crq);
3441 }
3442
3443 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3444 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3445 {
3446         union ibmvnic_crq crq;
3447
3448         atomic_set(&adapter->running_cap_crqs, 0);
3449         memset(&crq, 0, sizeof(crq));
3450         crq.query_capability.first = IBMVNIC_CRQ_CMD;
3451         crq.query_capability.cmd = QUERY_CAPABILITY;
3452
3453         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3454         atomic_inc(&adapter->running_cap_crqs);
3455         ibmvnic_send_crq(adapter, &crq);
3456
3457         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3458         atomic_inc(&adapter->running_cap_crqs);
3459         ibmvnic_send_crq(adapter, &crq);
3460
3461         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3462         atomic_inc(&adapter->running_cap_crqs);
3463         ibmvnic_send_crq(adapter, &crq);
3464
3465         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3466         atomic_inc(&adapter->running_cap_crqs);
3467         ibmvnic_send_crq(adapter, &crq);
3468
3469         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3470         atomic_inc(&adapter->running_cap_crqs);
3471         ibmvnic_send_crq(adapter, &crq);
3472
3473         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3474         atomic_inc(&adapter->running_cap_crqs);
3475         ibmvnic_send_crq(adapter, &crq);
3476
3477         crq.query_capability.capability =
3478             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3479         atomic_inc(&adapter->running_cap_crqs);
3480         ibmvnic_send_crq(adapter, &crq);
3481
3482         crq.query_capability.capability =
3483             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3484         atomic_inc(&adapter->running_cap_crqs);
3485         ibmvnic_send_crq(adapter, &crq);
3486
3487         crq.query_capability.capability =
3488             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3489         atomic_inc(&adapter->running_cap_crqs);
3490         ibmvnic_send_crq(adapter, &crq);
3491
3492         crq.query_capability.capability =
3493             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3494         atomic_inc(&adapter->running_cap_crqs);
3495         ibmvnic_send_crq(adapter, &crq);
3496
3497         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3498         atomic_inc(&adapter->running_cap_crqs);
3499         ibmvnic_send_crq(adapter, &crq);
3500
3501         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3502         atomic_inc(&adapter->running_cap_crqs);
3503         ibmvnic_send_crq(adapter, &crq);
3504
3505         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3506         atomic_inc(&adapter->running_cap_crqs);
3507         ibmvnic_send_crq(adapter, &crq);
3508
3509         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3510         atomic_inc(&adapter->running_cap_crqs);
3511         ibmvnic_send_crq(adapter, &crq);
3512
3513         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3514         atomic_inc(&adapter->running_cap_crqs);
3515         ibmvnic_send_crq(adapter, &crq);
3516
3517         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3518         atomic_inc(&adapter->running_cap_crqs);
3519         ibmvnic_send_crq(adapter, &crq);
3520
3521         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3522         atomic_inc(&adapter->running_cap_crqs);
3523         ibmvnic_send_crq(adapter, &crq);
3524
3525         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3526         atomic_inc(&adapter->running_cap_crqs);
3527         ibmvnic_send_crq(adapter, &crq);
3528
3529         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3530         atomic_inc(&adapter->running_cap_crqs);
3531         ibmvnic_send_crq(adapter, &crq);
3532
3533         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3534         atomic_inc(&adapter->running_cap_crqs);
3535         ibmvnic_send_crq(adapter, &crq);
3536
3537         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3538         atomic_inc(&adapter->running_cap_crqs);
3539         ibmvnic_send_crq(adapter, &crq);
3540
3541         crq.query_capability.capability =
3542                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3543         atomic_inc(&adapter->running_cap_crqs);
3544         ibmvnic_send_crq(adapter, &crq);
3545
3546         crq.query_capability.capability =
3547                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3548         atomic_inc(&adapter->running_cap_crqs);
3549         ibmvnic_send_crq(adapter, &crq);
3550
3551         crq.query_capability.capability =
3552                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3553         atomic_inc(&adapter->running_cap_crqs);
3554         ibmvnic_send_crq(adapter, &crq);
3555
3556         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3557         atomic_inc(&adapter->running_cap_crqs);
3558         ibmvnic_send_crq(adapter, &crq);
3559 }
3560
3561 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3562                                 struct ibmvnic_adapter *adapter)
3563 {
3564         struct device *dev = &adapter->vdev->dev;
3565
3566         if (crq->get_vpd_size_rsp.rc.code) {
3567                 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3568                         crq->get_vpd_size_rsp.rc.code);
3569                 complete(&adapter->fw_done);
3570                 return;
3571         }
3572
3573         adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3574         complete(&adapter->fw_done);
3575 }
3576
3577 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3578                            struct ibmvnic_adapter *adapter)
3579 {
3580         struct device *dev = &adapter->vdev->dev;
3581         unsigned char *substr = NULL;
3582         u8 fw_level_len = 0;
3583
3584         memset(adapter->fw_version, 0, 32);
3585
3586         dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3587                          DMA_FROM_DEVICE);
3588
3589         if (crq->get_vpd_rsp.rc.code) {
3590                 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3591                         crq->get_vpd_rsp.rc.code);
3592                 goto complete;
3593         }
3594
3595         /* get the position of the firmware version info
3596          * located after the ASCII 'RM' substring in the buffer
3597          */
3598         substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3599         if (!substr) {
3600                 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3601                 goto complete;
3602         }
3603
3604         /* get length of firmware level ASCII substring */
3605         if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3606                 fw_level_len = *(substr + 2);
3607         } else {
3608                 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3609                 goto complete;
3610         }
3611
3612         /* copy firmware version string from vpd into adapter */
3613         if ((substr + 3 + fw_level_len) <
3614             (adapter->vpd->buff + adapter->vpd->len)) {
3615                 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3616         } else {
3617                 dev_info(dev, "FW substr extrapolated VPD buff\n");
3618         }
3619
3620 complete:
3621         if (adapter->fw_version[0] == '\0')
3622                 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3623         complete(&adapter->fw_done);
3624 }
3625
3626 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3627 {
3628         struct device *dev = &adapter->vdev->dev;
3629         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3630         union ibmvnic_crq crq;
3631         int i;
3632
3633         dma_unmap_single(dev, adapter->ip_offload_tok,
3634                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3635
3636         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3637         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3638                 netdev_dbg(adapter->netdev, "%016lx\n",
3639                            ((unsigned long int *)(buf))[i]);
3640
3641         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3642         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3643         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3644                    buf->tcp_ipv4_chksum);
3645         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3646                    buf->tcp_ipv6_chksum);
3647         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3648                    buf->udp_ipv4_chksum);
3649         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3650                    buf->udp_ipv6_chksum);
3651         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3652                    buf->large_tx_ipv4);
3653         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3654                    buf->large_tx_ipv6);
3655         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3656                    buf->large_rx_ipv4);
3657         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3658                    buf->large_rx_ipv6);
3659         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3660                    buf->max_ipv4_header_size);
3661         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3662                    buf->max_ipv6_header_size);
3663         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3664                    buf->max_tcp_header_size);
3665         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3666                    buf->max_udp_header_size);
3667         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3668                    buf->max_large_tx_size);
3669         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3670                    buf->max_large_rx_size);
3671         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3672                    buf->ipv6_extension_header);
3673         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3674                    buf->tcp_pseudosum_req);
3675         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3676                    buf->num_ipv6_ext_headers);
3677         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3678                    buf->off_ipv6_ext_headers);
3679
3680         adapter->ip_offload_ctrl_tok =
3681             dma_map_single(dev, &adapter->ip_offload_ctrl,
3682                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3683
3684         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3685                 dev_err(dev, "Couldn't map ip offload control buffer\n");
3686                 return;
3687         }
3688
3689         adapter->ip_offload_ctrl.len =
3690             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3691         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3692         adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3693         adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3694         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3695         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3696         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3697         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3698         adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3699         adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3700
3701         /* large_rx disabled for now, additional features needed */
3702         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3703         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3704
3705         adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3706
3707         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3708                 adapter->netdev->features |= NETIF_F_IP_CSUM;
3709
3710         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3711                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3712
3713         if ((adapter->netdev->features &
3714             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3715                 adapter->netdev->features |= NETIF_F_RXCSUM;
3716
3717         if (buf->large_tx_ipv4)
3718                 adapter->netdev->features |= NETIF_F_TSO;
3719         if (buf->large_tx_ipv6)
3720                 adapter->netdev->features |= NETIF_F_TSO6;
3721
3722         adapter->netdev->hw_features |= adapter->netdev->features;
3723
3724         memset(&crq, 0, sizeof(crq));
3725         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3726         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3727         crq.control_ip_offload.len =
3728             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3729         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3730         ibmvnic_send_crq(adapter, &crq);
3731 }
3732
3733 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3734                                   struct ibmvnic_adapter *adapter)
3735 {
3736         struct device *dev = &adapter->vdev->dev;
3737         struct ibmvnic_error_buff *error_buff, *tmp;
3738         unsigned long flags;
3739         bool found = false;
3740         int i;
3741
3742         if (!crq->request_error_rsp.rc.code) {
3743                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3744                          crq->request_error_rsp.rc.code);
3745                 return;
3746         }
3747
3748         spin_lock_irqsave(&adapter->error_list_lock, flags);
3749         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3750                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3751                         found = true;
3752                         list_del(&error_buff->list);
3753                         break;
3754                 }
3755         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3756
3757         if (!found) {
3758                 dev_err(dev, "Couldn't find error id %x\n",
3759                         be32_to_cpu(crq->request_error_rsp.error_id));
3760                 return;
3761         }
3762
3763         dev_err(dev, "Detailed info for error id %x:",
3764                 be32_to_cpu(crq->request_error_rsp.error_id));
3765
3766         for (i = 0; i < error_buff->len; i++) {
3767                 pr_cont("%02x", (int)error_buff->buff[i]);
3768                 if (i % 8 == 7)
3769                         pr_cont(" ");
3770         }
3771         pr_cont("\n");
3772
3773         dma_unmap_single(dev, error_buff->dma, error_buff->len,
3774                          DMA_FROM_DEVICE);
3775         kfree(error_buff->buff);
3776         kfree(error_buff);
3777 }
3778
3779 static void request_error_information(struct ibmvnic_adapter *adapter,
3780                                       union ibmvnic_crq *err_crq)
3781 {
3782         struct device *dev = &adapter->vdev->dev;
3783         struct net_device *netdev = adapter->netdev;
3784         struct ibmvnic_error_buff *error_buff;
3785         unsigned long timeout = msecs_to_jiffies(30000);
3786         union ibmvnic_crq crq;
3787         unsigned long flags;
3788         int rc, detail_len;
3789
3790         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3791         if (!error_buff)
3792                 return;
3793
3794         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3795         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3796         if (!error_buff->buff) {
3797                 kfree(error_buff);
3798                 return;
3799         }
3800
3801         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3802                                          DMA_FROM_DEVICE);
3803         if (dma_mapping_error(dev, error_buff->dma)) {
3804                 netdev_err(netdev, "Couldn't map error buffer\n");
3805                 kfree(error_buff->buff);
3806                 kfree(error_buff);
3807                 return;
3808         }
3809
3810         error_buff->len = detail_len;
3811         error_buff->error_id = err_crq->error_indication.error_id;
3812
3813         spin_lock_irqsave(&adapter->error_list_lock, flags);
3814         list_add_tail(&error_buff->list, &adapter->errors);
3815         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3816
3817         memset(&crq, 0, sizeof(crq));
3818         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3819         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3820         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3821         crq.request_error_info.len = cpu_to_be32(detail_len);
3822         crq.request_error_info.error_id = err_crq->error_indication.error_id;
3823
3824         rc = ibmvnic_send_crq(adapter, &crq);
3825         if (rc) {
3826                 netdev_err(netdev, "failed to request error information\n");
3827                 goto err_info_fail;
3828         }
3829
3830         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3831                 netdev_err(netdev, "timeout waiting for error information\n");
3832                 goto err_info_fail;
3833         }
3834
3835         return;
3836
3837 err_info_fail:
3838         spin_lock_irqsave(&adapter->error_list_lock, flags);
3839         list_del(&error_buff->list);
3840         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3841
3842         kfree(error_buff->buff);
3843         kfree(error_buff);
3844 }
3845
3846 static void handle_error_indication(union ibmvnic_crq *crq,
3847                                     struct ibmvnic_adapter *adapter)
3848 {
3849         struct device *dev = &adapter->vdev->dev;
3850
3851         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3852                 crq->error_indication.flags
3853                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3854                 be32_to_cpu(crq->error_indication.error_id),
3855                 be16_to_cpu(crq->error_indication.error_cause));
3856
3857         if (be32_to_cpu(crq->error_indication.error_id))
3858                 request_error_information(adapter, crq);
3859
3860         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3861                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3862         else
3863                 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3864 }
3865
3866 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3867                                  struct ibmvnic_adapter *adapter)
3868 {
3869         struct net_device *netdev = adapter->netdev;
3870         struct device *dev = &adapter->vdev->dev;
3871         long rc;
3872
3873         rc = crq->change_mac_addr_rsp.rc.code;
3874         if (rc) {
3875                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3876                 goto out;
3877         }
3878         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3879                ETH_ALEN);
3880 out:
3881         complete(&adapter->fw_done);
3882         return rc;
3883 }
3884
3885 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3886                                    struct ibmvnic_adapter *adapter)
3887 {
3888         struct device *dev = &adapter->vdev->dev;
3889         u64 *req_value;
3890         char *name;
3891
3892         atomic_dec(&adapter->running_cap_crqs);
3893         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3894         case REQ_TX_QUEUES:
3895                 req_value = &adapter->req_tx_queues;
3896                 name = "tx";
3897                 break;
3898         case REQ_RX_QUEUES:
3899                 req_value = &adapter->req_rx_queues;
3900                 name = "rx";
3901                 break;
3902         case REQ_RX_ADD_QUEUES:
3903                 req_value = &adapter->req_rx_add_queues;
3904                 name = "rx_add";
3905                 break;
3906         case REQ_TX_ENTRIES_PER_SUBCRQ:
3907                 req_value = &adapter->req_tx_entries_per_subcrq;
3908                 name = "tx_entries_per_subcrq";
3909                 break;
3910         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3911                 req_value = &adapter->req_rx_add_entries_per_subcrq;
3912                 name = "rx_add_entries_per_subcrq";
3913                 break;
3914         case REQ_MTU:
3915                 req_value = &adapter->req_mtu;
3916                 name = "mtu";
3917                 break;
3918         case PROMISC_REQUESTED:
3919                 req_value = &adapter->promisc;
3920                 name = "promisc";
3921                 break;
3922         default:
3923                 dev_err(dev, "Got invalid cap request rsp %d\n",
3924                         crq->request_capability.capability);
3925                 return;
3926         }
3927
3928         switch (crq->request_capability_rsp.rc.code) {
3929         case SUCCESS:
3930                 break;
3931         case PARTIALSUCCESS:
3932                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3933                          *req_value,
3934                          (long int)be64_to_cpu(crq->request_capability_rsp.
3935                                                number), name);
3936
3937                 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3938                     REQ_MTU) {
3939                         pr_err("mtu of %llu is not supported. Reverting.\n",
3940                                *req_value);
3941                         *req_value = adapter->fallback.mtu;
3942                 } else {
3943                         *req_value =
3944                                 be64_to_cpu(crq->request_capability_rsp.number);
3945                 }
3946
3947                 ibmvnic_send_req_caps(adapter, 1);
3948                 return;
3949         default:
3950                 dev_err(dev, "Error %d in request cap rsp\n",
3951                         crq->request_capability_rsp.rc.code);
3952                 return;
3953         }
3954
3955         /* Done receiving requested capabilities, query IP offload support */
3956         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3957                 union ibmvnic_crq newcrq;
3958                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3959                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3960                     &adapter->ip_offload_buf;
3961
3962                 adapter->wait_capability = false;
3963                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3964                                                          buf_sz,
3965                                                          DMA_FROM_DEVICE);
3966
3967                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3968                         if (!firmware_has_feature(FW_FEATURE_CMO))
3969                                 dev_err(dev, "Couldn't map offload buffer\n");
3970                         return;
3971                 }
3972
3973                 memset(&newcrq, 0, sizeof(newcrq));
3974                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3975                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3976                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3977                 newcrq.query_ip_offload.ioba =
3978                     cpu_to_be32(adapter->ip_offload_tok);
3979
3980                 ibmvnic_send_crq(adapter, &newcrq);
3981         }
3982 }
3983
3984 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3985                             struct ibmvnic_adapter *adapter)
3986 {
3987         struct device *dev = &adapter->vdev->dev;
3988         struct net_device *netdev = adapter->netdev;
3989         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3990         struct ibmvnic_login_buffer *login = adapter->login_buf;
3991         int i;
3992
3993         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3994                          DMA_TO_DEVICE);
3995         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3996                          adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
3997
3998         /* If the number of queues requested can't be allocated by the
3999          * server, the login response will return with code 1. We will need
4000          * to resend the login buffer with fewer queues requested.
4001          */
4002         if (login_rsp_crq->generic.rc.code) {
4003                 adapter->init_done_rc = login_rsp_crq->generic.rc.code;
4004                 complete(&adapter->init_done);
4005                 return 0;
4006         }
4007
4008         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4009
4010         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
4011         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
4012                 netdev_dbg(adapter->netdev, "%016lx\n",
4013                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
4014         }
4015
4016         /* Sanity checks */
4017         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
4018             (be32_to_cpu(login->num_rxcomp_subcrqs) *
4019              adapter->req_rx_add_queues !=
4020              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
4021                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
4022                 ibmvnic_remove(adapter->vdev);
4023                 return -EIO;
4024         }
4025         release_login_buffer(adapter);
4026         complete(&adapter->init_done);
4027
4028         return 0;
4029 }
4030
4031 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
4032                                      struct ibmvnic_adapter *adapter)
4033 {
4034         struct device *dev = &adapter->vdev->dev;
4035         long rc;
4036
4037         rc = crq->request_unmap_rsp.rc.code;
4038         if (rc)
4039                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
4040 }
4041
4042 static void handle_query_map_rsp(union ibmvnic_crq *crq,
4043                                  struct ibmvnic_adapter *adapter)
4044 {
4045         struct net_device *netdev = adapter->netdev;
4046         struct device *dev = &adapter->vdev->dev;
4047         long rc;
4048
4049         rc = crq->query_map_rsp.rc.code;
4050         if (rc) {
4051                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
4052                 return;
4053         }
4054         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
4055                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
4056                    crq->query_map_rsp.free_pages);
4057 }
4058
4059 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
4060                                  struct ibmvnic_adapter *adapter)
4061 {
4062         struct net_device *netdev = adapter->netdev;
4063         struct device *dev = &adapter->vdev->dev;
4064         long rc;
4065
4066         atomic_dec(&adapter->running_cap_crqs);
4067         netdev_dbg(netdev, "Outstanding queries: %d\n",
4068                    atomic_read(&adapter->running_cap_crqs));
4069         rc = crq->query_capability.rc.code;
4070         if (rc) {
4071                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
4072                 goto out;
4073         }
4074
4075         switch (be16_to_cpu(crq->query_capability.capability)) {
4076         case MIN_TX_QUEUES:
4077                 adapter->min_tx_queues =
4078                     be64_to_cpu(crq->query_capability.number);
4079                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
4080                            adapter->min_tx_queues);
4081                 break;
4082         case MIN_RX_QUEUES:
4083                 adapter->min_rx_queues =
4084                     be64_to_cpu(crq->query_capability.number);
4085                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
4086                            adapter->min_rx_queues);
4087                 break;
4088         case MIN_RX_ADD_QUEUES:
4089                 adapter->min_rx_add_queues =
4090                     be64_to_cpu(crq->query_capability.number);
4091                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
4092                            adapter->min_rx_add_queues);
4093                 break;
4094         case MAX_TX_QUEUES:
4095                 adapter->max_tx_queues =
4096                     be64_to_cpu(crq->query_capability.number);
4097                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
4098                            adapter->max_tx_queues);
4099                 break;
4100         case MAX_RX_QUEUES:
4101                 adapter->max_rx_queues =
4102                     be64_to_cpu(crq->query_capability.number);
4103                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
4104                            adapter->max_rx_queues);
4105                 break;
4106         case MAX_RX_ADD_QUEUES:
4107                 adapter->max_rx_add_queues =
4108                     be64_to_cpu(crq->query_capability.number);
4109                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
4110                            adapter->max_rx_add_queues);
4111                 break;
4112         case MIN_TX_ENTRIES_PER_SUBCRQ:
4113                 adapter->min_tx_entries_per_subcrq =
4114                     be64_to_cpu(crq->query_capability.number);
4115                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
4116                            adapter->min_tx_entries_per_subcrq);
4117                 break;
4118         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
4119                 adapter->min_rx_add_entries_per_subcrq =
4120                     be64_to_cpu(crq->query_capability.number);
4121                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
4122                            adapter->min_rx_add_entries_per_subcrq);
4123                 break;
4124         case MAX_TX_ENTRIES_PER_SUBCRQ:
4125                 adapter->max_tx_entries_per_subcrq =
4126                     be64_to_cpu(crq->query_capability.number);
4127                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
4128                            adapter->max_tx_entries_per_subcrq);
4129                 break;
4130         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
4131                 adapter->max_rx_add_entries_per_subcrq =
4132                     be64_to_cpu(crq->query_capability.number);
4133                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
4134                            adapter->max_rx_add_entries_per_subcrq);
4135                 break;
4136         case TCP_IP_OFFLOAD:
4137                 adapter->tcp_ip_offload =
4138                     be64_to_cpu(crq->query_capability.number);
4139                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
4140                            adapter->tcp_ip_offload);
4141                 break;
4142         case PROMISC_SUPPORTED:
4143                 adapter->promisc_supported =
4144                     be64_to_cpu(crq->query_capability.number);
4145                 netdev_dbg(netdev, "promisc_supported = %lld\n",
4146                            adapter->promisc_supported);
4147                 break;
4148         case MIN_MTU:
4149                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
4150                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4151                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
4152                 break;
4153         case MAX_MTU:
4154                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
4155                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4156                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
4157                 break;
4158         case MAX_MULTICAST_FILTERS:
4159                 adapter->max_multicast_filters =
4160                     be64_to_cpu(crq->query_capability.number);
4161                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
4162                            adapter->max_multicast_filters);
4163                 break;
4164         case VLAN_HEADER_INSERTION:
4165                 adapter->vlan_header_insertion =
4166                     be64_to_cpu(crq->query_capability.number);
4167                 if (adapter->vlan_header_insertion)
4168                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
4169                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
4170                            adapter->vlan_header_insertion);
4171                 break;
4172         case RX_VLAN_HEADER_INSERTION:
4173                 adapter->rx_vlan_header_insertion =
4174                     be64_to_cpu(crq->query_capability.number);
4175                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
4176                            adapter->rx_vlan_header_insertion);
4177                 break;
4178         case MAX_TX_SG_ENTRIES:
4179                 adapter->max_tx_sg_entries =
4180                     be64_to_cpu(crq->query_capability.number);
4181                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
4182                            adapter->max_tx_sg_entries);
4183                 break;
4184         case RX_SG_SUPPORTED:
4185                 adapter->rx_sg_supported =
4186                     be64_to_cpu(crq->query_capability.number);
4187                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
4188                            adapter->rx_sg_supported);
4189                 break;
4190         case OPT_TX_COMP_SUB_QUEUES:
4191                 adapter->opt_tx_comp_sub_queues =
4192                     be64_to_cpu(crq->query_capability.number);
4193                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
4194                            adapter->opt_tx_comp_sub_queues);
4195                 break;
4196         case OPT_RX_COMP_QUEUES:
4197                 adapter->opt_rx_comp_queues =
4198                     be64_to_cpu(crq->query_capability.number);
4199                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
4200                            adapter->opt_rx_comp_queues);
4201                 break;
4202         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
4203                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
4204                     be64_to_cpu(crq->query_capability.number);
4205                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
4206                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
4207                 break;
4208         case OPT_TX_ENTRIES_PER_SUBCRQ:
4209                 adapter->opt_tx_entries_per_subcrq =
4210                     be64_to_cpu(crq->query_capability.number);
4211                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
4212                            adapter->opt_tx_entries_per_subcrq);
4213                 break;
4214         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
4215                 adapter->opt_rxba_entries_per_subcrq =
4216                     be64_to_cpu(crq->query_capability.number);
4217                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
4218                            adapter->opt_rxba_entries_per_subcrq);
4219                 break;
4220         case TX_RX_DESC_REQ:
4221                 adapter->tx_rx_desc_req = crq->query_capability.number;
4222                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
4223                            adapter->tx_rx_desc_req);
4224                 break;
4225
4226         default:
4227                 netdev_err(netdev, "Got invalid cap rsp %d\n",
4228                            crq->query_capability.capability);
4229         }
4230
4231 out:
4232         if (atomic_read(&adapter->running_cap_crqs) == 0) {
4233                 adapter->wait_capability = false;
4234                 ibmvnic_send_req_caps(adapter, 0);
4235         }
4236 }
4237
4238 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
4239                                struct ibmvnic_adapter *adapter)
4240 {
4241         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
4242         struct net_device *netdev = adapter->netdev;
4243         struct device *dev = &adapter->vdev->dev;
4244         u64 *u64_crq = (u64 *)crq;
4245         long rc;
4246
4247         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
4248                    (unsigned long int)cpu_to_be64(u64_crq[0]),
4249                    (unsigned long int)cpu_to_be64(u64_crq[1]));
4250         switch (gen_crq->first) {
4251         case IBMVNIC_CRQ_INIT_RSP:
4252                 switch (gen_crq->cmd) {
4253                 case IBMVNIC_CRQ_INIT:
4254                         dev_info(dev, "Partner initialized\n");
4255                         adapter->from_passive_init = true;
4256                         adapter->failover_pending = false;
4257                         if (!completion_done(&adapter->init_done)) {
4258                                 complete(&adapter->init_done);
4259                                 adapter->init_done_rc = -EIO;
4260                         }
4261                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
4262                         break;
4263                 case IBMVNIC_CRQ_INIT_COMPLETE:
4264                         dev_info(dev, "Partner initialization complete\n");
4265                         adapter->crq.active = true;
4266                         send_version_xchg(adapter);
4267                         break;
4268                 default:
4269                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
4270                 }
4271                 return;
4272         case IBMVNIC_CRQ_XPORT_EVENT:
4273                 netif_carrier_off(netdev);
4274                 adapter->crq.active = false;
4275                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
4276                         dev_info(dev, "Migrated, re-enabling adapter\n");
4277                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
4278                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
4279                         dev_info(dev, "Backing device failover detected\n");
4280                         adapter->failover_pending = true;
4281                 } else {
4282                         /* The adapter lost the connection */
4283                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
4284                                 gen_crq->cmd);
4285                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4286                 }
4287                 return;
4288         case IBMVNIC_CRQ_CMD_RSP:
4289                 break;
4290         default:
4291                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4292                         gen_crq->first);
4293                 return;
4294         }
4295
4296         switch (gen_crq->cmd) {
4297         case VERSION_EXCHANGE_RSP:
4298                 rc = crq->version_exchange_rsp.rc.code;
4299                 if (rc) {
4300                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4301                         break;
4302                 }
4303                 dev_info(dev, "Partner protocol version is %d\n",
4304                          crq->version_exchange_rsp.version);
4305                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4306                     ibmvnic_version)
4307                         ibmvnic_version =
4308                             be16_to_cpu(crq->version_exchange_rsp.version);
4309                 send_cap_queries(adapter);
4310                 break;
4311         case QUERY_CAPABILITY_RSP:
4312                 handle_query_cap_rsp(crq, adapter);
4313                 break;
4314         case QUERY_MAP_RSP:
4315                 handle_query_map_rsp(crq, adapter);
4316                 break;
4317         case REQUEST_MAP_RSP:
4318                 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4319                 complete(&adapter->fw_done);
4320                 break;
4321         case REQUEST_UNMAP_RSP:
4322                 handle_request_unmap_rsp(crq, adapter);
4323                 break;
4324         case REQUEST_CAPABILITY_RSP:
4325                 handle_request_cap_rsp(crq, adapter);
4326                 break;
4327         case LOGIN_RSP:
4328                 netdev_dbg(netdev, "Got Login Response\n");
4329                 handle_login_rsp(crq, adapter);
4330                 break;
4331         case LOGICAL_LINK_STATE_RSP:
4332                 netdev_dbg(netdev,
4333                            "Got Logical Link State Response, state: %d rc: %d\n",
4334                            crq->logical_link_state_rsp.link_state,
4335                            crq->logical_link_state_rsp.rc.code);
4336                 adapter->logical_link_state =
4337                     crq->logical_link_state_rsp.link_state;
4338                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4339                 complete(&adapter->init_done);
4340                 break;
4341         case LINK_STATE_INDICATION:
4342                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4343                 adapter->phys_link_state =
4344                     crq->link_state_indication.phys_link_state;
4345                 adapter->logical_link_state =
4346                     crq->link_state_indication.logical_link_state;
4347                 break;
4348         case CHANGE_MAC_ADDR_RSP:
4349                 netdev_dbg(netdev, "Got MAC address change Response\n");
4350                 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4351                 break;
4352         case ERROR_INDICATION:
4353                 netdev_dbg(netdev, "Got Error Indication\n");
4354                 handle_error_indication(crq, adapter);
4355                 break;
4356         case REQUEST_ERROR_RSP:
4357                 netdev_dbg(netdev, "Got Error Detail Response\n");
4358                 handle_error_info_rsp(crq, adapter);
4359                 break;
4360         case REQUEST_STATISTICS_RSP:
4361                 netdev_dbg(netdev, "Got Statistics Response\n");
4362                 complete(&adapter->stats_done);
4363                 break;
4364         case QUERY_IP_OFFLOAD_RSP:
4365                 netdev_dbg(netdev, "Got Query IP offload Response\n");
4366                 handle_query_ip_offload_rsp(adapter);
4367                 break;
4368         case MULTICAST_CTRL_RSP:
4369                 netdev_dbg(netdev, "Got multicast control Response\n");
4370                 break;
4371         case CONTROL_IP_OFFLOAD_RSP:
4372                 netdev_dbg(netdev, "Got Control IP offload Response\n");
4373                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4374                                  sizeof(adapter->ip_offload_ctrl),
4375                                  DMA_TO_DEVICE);
4376                 complete(&adapter->init_done);
4377                 break;
4378         case COLLECT_FW_TRACE_RSP:
4379                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4380                 complete(&adapter->fw_done);
4381                 break;
4382         case GET_VPD_SIZE_RSP:
4383                 handle_vpd_size_rsp(crq, adapter);
4384                 break;
4385         case GET_VPD_RSP:
4386                 handle_vpd_rsp(crq, adapter);
4387                 break;
4388         default:
4389                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4390                            gen_crq->cmd);
4391         }
4392 }
4393
4394 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4395 {
4396         struct ibmvnic_adapter *adapter = instance;
4397
4398         tasklet_schedule(&adapter->tasklet);
4399         return IRQ_HANDLED;
4400 }
4401
4402 static void ibmvnic_tasklet(void *data)
4403 {
4404         struct ibmvnic_adapter *adapter = data;
4405         struct ibmvnic_crq_queue *queue = &adapter->crq;
4406         union ibmvnic_crq *crq;
4407         unsigned long flags;
4408         bool done = false;
4409
4410         spin_lock_irqsave(&queue->lock, flags);
4411         while (!done) {
4412                 /* Pull all the valid messages off the CRQ */
4413                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4414                         ibmvnic_handle_crq(crq, adapter);
4415                         crq->generic.first = 0;
4416                 }
4417
4418                 /* remain in tasklet until all
4419                  * capabilities responses are received
4420                  */
4421                 if (!adapter->wait_capability)
4422                         done = true;
4423         }
4424         /* if capabilities CRQ's were sent in this tasklet, the following
4425          * tasklet must wait until all responses are received
4426          */
4427         if (atomic_read(&adapter->running_cap_crqs) != 0)
4428                 adapter->wait_capability = true;
4429         spin_unlock_irqrestore(&queue->lock, flags);
4430 }
4431
4432 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4433 {
4434         struct vio_dev *vdev = adapter->vdev;
4435         int rc;
4436
4437         do {
4438                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4439         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4440
4441         if (rc)
4442                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4443
4444         return rc;
4445 }
4446
4447 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4448 {
4449         struct ibmvnic_crq_queue *crq = &adapter->crq;
4450         struct device *dev = &adapter->vdev->dev;
4451         struct vio_dev *vdev = adapter->vdev;
4452         int rc;
4453
4454         /* Close the CRQ */
4455         do {
4456                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4457         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4458
4459         /* Clean out the queue */
4460         memset(crq->msgs, 0, PAGE_SIZE);
4461         crq->cur = 0;
4462         crq->active = false;
4463
4464         /* And re-open it again */
4465         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4466                                 crq->msg_token, PAGE_SIZE);
4467
4468         if (rc == H_CLOSED)
4469                 /* Adapter is good, but other end is not ready */
4470                 dev_warn(dev, "Partner adapter not ready\n");
4471         else if (rc != 0)
4472                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4473
4474         return rc;
4475 }
4476
4477 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4478 {
4479         struct ibmvnic_crq_queue *crq = &adapter->crq;
4480         struct vio_dev *vdev = adapter->vdev;
4481         long rc;
4482
4483         if (!crq->msgs)
4484                 return;
4485
4486         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4487         free_irq(vdev->irq, adapter);
4488         tasklet_kill(&adapter->tasklet);
4489         do {
4490                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4491         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4492
4493         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4494                          DMA_BIDIRECTIONAL);
4495         free_page((unsigned long)crq->msgs);
4496         crq->msgs = NULL;
4497         crq->active = false;
4498 }
4499
4500 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4501 {
4502         struct ibmvnic_crq_queue *crq = &adapter->crq;
4503         struct device *dev = &adapter->vdev->dev;
4504         struct vio_dev *vdev = adapter->vdev;
4505         int rc, retrc = -ENOMEM;
4506
4507         if (crq->msgs)
4508                 return 0;
4509
4510         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4511         /* Should we allocate more than one page? */
4512
4513         if (!crq->msgs)
4514                 return -ENOMEM;
4515
4516         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4517         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4518                                         DMA_BIDIRECTIONAL);
4519         if (dma_mapping_error(dev, crq->msg_token))
4520                 goto map_failed;
4521
4522         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4523                                 crq->msg_token, PAGE_SIZE);
4524
4525         if (rc == H_RESOURCE)
4526                 /* maybe kexecing and resource is busy. try a reset */
4527                 rc = ibmvnic_reset_crq(adapter);
4528         retrc = rc;
4529
4530         if (rc == H_CLOSED) {
4531                 dev_warn(dev, "Partner adapter not ready\n");
4532         } else if (rc) {
4533                 dev_warn(dev, "Error %d opening adapter\n", rc);
4534                 goto reg_crq_failed;
4535         }
4536
4537         retrc = 0;
4538
4539         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4540                      (unsigned long)adapter);
4541
4542         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4543         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4544                          adapter);
4545         if (rc) {
4546                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4547                         vdev->irq, rc);
4548                 goto req_irq_failed;
4549         }
4550
4551         rc = vio_enable_interrupts(vdev);
4552         if (rc) {
4553                 dev_err(dev, "Error %d enabling interrupts\n", rc);
4554                 goto req_irq_failed;
4555         }
4556
4557         crq->cur = 0;
4558         spin_lock_init(&crq->lock);
4559
4560         return retrc;
4561
4562 req_irq_failed:
4563         tasklet_kill(&adapter->tasklet);
4564         do {
4565                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4566         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4567 reg_crq_failed:
4568         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4569 map_failed:
4570         free_page((unsigned long)crq->msgs);
4571         crq->msgs = NULL;
4572         return retrc;
4573 }
4574
4575 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
4576 {
4577         struct device *dev = &adapter->vdev->dev;
4578         unsigned long timeout = msecs_to_jiffies(30000);
4579         u64 old_num_rx_queues, old_num_tx_queues;
4580         int rc;
4581
4582         adapter->from_passive_init = false;
4583
4584         old_num_rx_queues = adapter->req_rx_queues;
4585         old_num_tx_queues = adapter->req_tx_queues;
4586
4587         init_completion(&adapter->init_done);
4588         adapter->init_done_rc = 0;
4589         ibmvnic_send_crq_init(adapter);
4590         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4591                 dev_err(dev, "Initialization sequence timed out\n");
4592                 return -1;
4593         }
4594
4595         if (adapter->init_done_rc) {
4596                 release_crq_queue(adapter);
4597                 return adapter->init_done_rc;
4598         }
4599
4600         if (adapter->from_passive_init) {
4601                 adapter->state = VNIC_OPEN;
4602                 adapter->from_passive_init = false;
4603                 return -1;
4604         }
4605
4606         if (adapter->resetting && !adapter->wait_for_reset &&
4607             adapter->reset_reason != VNIC_RESET_MOBILITY) {
4608                 if (adapter->req_rx_queues != old_num_rx_queues ||
4609                     adapter->req_tx_queues != old_num_tx_queues) {
4610                         release_sub_crqs(adapter, 0);
4611                         rc = init_sub_crqs(adapter);
4612                 } else {
4613                         rc = reset_sub_crq_queues(adapter);
4614                 }
4615         } else {
4616                 rc = init_sub_crqs(adapter);
4617         }
4618
4619         if (rc) {
4620                 dev_err(dev, "Initialization of sub crqs failed\n");
4621                 release_crq_queue(adapter);
4622                 return rc;
4623         }
4624
4625         rc = init_sub_crq_irqs(adapter);
4626         if (rc) {
4627                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4628                 release_crq_queue(adapter);
4629         }
4630
4631         return rc;
4632 }
4633
4634 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4635 {
4636         struct device *dev = &adapter->vdev->dev;
4637         unsigned long timeout = msecs_to_jiffies(30000);
4638         int rc;
4639
4640         adapter->from_passive_init = false;
4641
4642         init_completion(&adapter->init_done);
4643         adapter->init_done_rc = 0;
4644         ibmvnic_send_crq_init(adapter);
4645         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4646                 dev_err(dev, "Initialization sequence timed out\n");
4647                 return -1;
4648         }
4649
4650         if (adapter->init_done_rc) {
4651                 release_crq_queue(adapter);
4652                 return adapter->init_done_rc;
4653         }
4654
4655         if (adapter->from_passive_init) {
4656                 adapter->state = VNIC_OPEN;
4657                 adapter->from_passive_init = false;
4658                 return -1;
4659         }
4660
4661         rc = init_sub_crqs(adapter);
4662         if (rc) {
4663                 dev_err(dev, "Initialization of sub crqs failed\n");
4664                 release_crq_queue(adapter);
4665                 return rc;
4666         }
4667
4668         rc = init_sub_crq_irqs(adapter);
4669         if (rc) {
4670                 dev_err(dev, "Failed to initialize sub crq irqs\n");
4671                 release_crq_queue(adapter);
4672         }
4673
4674         return rc;
4675 }
4676
4677 static struct device_attribute dev_attr_failover;
4678
4679 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4680 {
4681         struct ibmvnic_adapter *adapter;
4682         struct net_device *netdev;
4683         unsigned char *mac_addr_p;
4684         int rc;
4685
4686         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4687                 dev->unit_address);
4688
4689         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4690                                                         VETH_MAC_ADDR, NULL);
4691         if (!mac_addr_p) {
4692                 dev_err(&dev->dev,
4693                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4694                         __FILE__, __LINE__);
4695                 return 0;
4696         }
4697
4698         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4699                                    IBMVNIC_MAX_QUEUES);
4700         if (!netdev)
4701                 return -ENOMEM;
4702
4703         adapter = netdev_priv(netdev);
4704         adapter->state = VNIC_PROBING;
4705         dev_set_drvdata(&dev->dev, netdev);
4706         adapter->vdev = dev;
4707         adapter->netdev = netdev;
4708
4709         ether_addr_copy(adapter->mac_addr, mac_addr_p);
4710         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4711         netdev->irq = dev->irq;
4712         netdev->netdev_ops = &ibmvnic_netdev_ops;
4713         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4714         SET_NETDEV_DEV(netdev, &dev->dev);
4715
4716         spin_lock_init(&adapter->stats_lock);
4717
4718         INIT_LIST_HEAD(&adapter->errors);
4719         spin_lock_init(&adapter->error_list_lock);
4720
4721         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4722         INIT_LIST_HEAD(&adapter->rwi_list);
4723         mutex_init(&adapter->reset_lock);
4724         mutex_init(&adapter->rwi_lock);
4725         adapter->resetting = false;
4726
4727         adapter->mac_change_pending = false;
4728
4729         do {
4730                 rc = init_crq_queue(adapter);
4731                 if (rc) {
4732                         dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
4733                                 rc);
4734                         goto ibmvnic_init_fail;
4735                 }
4736
4737                 rc = ibmvnic_init(adapter);
4738                 if (rc && rc != EAGAIN)
4739                         goto ibmvnic_init_fail;
4740         } while (rc == EAGAIN);
4741
4742         rc = init_stats_buffers(adapter);
4743         if (rc)
4744                 goto ibmvnic_init_fail;
4745
4746         rc = init_stats_token(adapter);
4747         if (rc)
4748                 goto ibmvnic_stats_fail;
4749
4750         netdev->mtu = adapter->req_mtu - ETH_HLEN;
4751         netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4752         netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4753
4754         rc = device_create_file(&dev->dev, &dev_attr_failover);
4755         if (rc)
4756                 goto ibmvnic_dev_file_err;
4757
4758         netif_carrier_off(netdev);
4759         rc = register_netdev(netdev);
4760         if (rc) {
4761                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4762                 goto ibmvnic_register_fail;
4763         }
4764         dev_info(&dev->dev, "ibmvnic registered\n");
4765
4766         adapter->state = VNIC_PROBED;
4767
4768         adapter->wait_for_reset = false;
4769
4770         return 0;
4771
4772 ibmvnic_register_fail:
4773         device_remove_file(&dev->dev, &dev_attr_failover);
4774
4775 ibmvnic_dev_file_err:
4776         release_stats_token(adapter);
4777
4778 ibmvnic_stats_fail:
4779         release_stats_buffers(adapter);
4780
4781 ibmvnic_init_fail:
4782         release_sub_crqs(adapter, 1);
4783         release_crq_queue(adapter);
4784         free_netdev(netdev);
4785
4786         return rc;
4787 }
4788
4789 static int ibmvnic_remove(struct vio_dev *dev)
4790 {
4791         struct net_device *netdev = dev_get_drvdata(&dev->dev);
4792         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4793
4794         adapter->state = VNIC_REMOVING;
4795         unregister_netdev(netdev);
4796         mutex_lock(&adapter->reset_lock);
4797
4798         release_resources(adapter);
4799         release_sub_crqs(adapter, 1);
4800         release_crq_queue(adapter);
4801
4802         release_stats_token(adapter);
4803         release_stats_buffers(adapter);
4804
4805         adapter->state = VNIC_REMOVED;
4806
4807         mutex_unlock(&adapter->reset_lock);
4808         device_remove_file(&dev->dev, &dev_attr_failover);
4809         free_netdev(netdev);
4810         dev_set_drvdata(&dev->dev, NULL);
4811
4812         return 0;
4813 }
4814
4815 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4816                               const char *buf, size_t count)
4817 {
4818         struct net_device *netdev = dev_get_drvdata(dev);
4819         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4820         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4821         __be64 session_token;
4822         long rc;
4823
4824         if (!sysfs_streq(buf, "1"))
4825                 return -EINVAL;
4826
4827         rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4828                          H_GET_SESSION_TOKEN, 0, 0, 0);
4829         if (rc) {
4830                 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4831                            rc);
4832                 return -EINVAL;
4833         }
4834
4835         session_token = (__be64)retbuf[0];
4836         netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4837                    be64_to_cpu(session_token));
4838         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4839                                 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4840         if (rc) {
4841                 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4842                            rc);
4843                 return -EINVAL;
4844         }
4845
4846         return count;
4847 }
4848
4849 static DEVICE_ATTR_WO(failover);
4850
4851 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4852 {
4853         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4854         struct ibmvnic_adapter *adapter;
4855         struct iommu_table *tbl;
4856         unsigned long ret = 0;
4857         int i;
4858
4859         tbl = get_iommu_table_base(&vdev->dev);
4860
4861         /* netdev inits at probe time along with the structures we need below*/
4862         if (!netdev)
4863                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4864
4865         adapter = netdev_priv(netdev);
4866
4867         ret += PAGE_SIZE; /* the crq message queue */
4868         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4869
4870         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4871                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4872
4873         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4874              i++)
4875                 ret += adapter->rx_pool[i].size *
4876                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4877
4878         return ret;
4879 }
4880
4881 static int ibmvnic_resume(struct device *dev)
4882 {
4883         struct net_device *netdev = dev_get_drvdata(dev);
4884         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4885
4886         if (adapter->state != VNIC_OPEN)
4887                 return 0;
4888
4889         tasklet_schedule(&adapter->tasklet);
4890
4891         return 0;
4892 }
4893
4894 static const struct vio_device_id ibmvnic_device_table[] = {
4895         {"network", "IBM,vnic"},
4896         {"", "" }
4897 };
4898 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4899
4900 static const struct dev_pm_ops ibmvnic_pm_ops = {
4901         .resume = ibmvnic_resume
4902 };
4903
4904 static struct vio_driver ibmvnic_driver = {
4905         .id_table       = ibmvnic_device_table,
4906         .probe          = ibmvnic_probe,
4907         .remove         = ibmvnic_remove,
4908         .get_desired_dma = ibmvnic_get_desired_dma,
4909         .name           = ibmvnic_driver_name,
4910         .pm             = &ibmvnic_pm_ops,
4911 };
4912
4913 /* module functions */
4914 static int __init ibmvnic_module_init(void)
4915 {
4916         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4917                 IBMVNIC_DRIVER_VERSION);
4918
4919         return vio_register_driver(&ibmvnic_driver);
4920 }
4921
4922 static void __exit ibmvnic_module_exit(void)
4923 {
4924         vio_unregister_driver(&ibmvnic_driver);
4925 }
4926
4927 module_init(ibmvnic_module_init);
4928 module_exit(ibmvnic_module_exit);