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/in.h>
  63 #include <linux/ip.h>
  64 #include <linux/ipv6.h>
  65 #include <linux/irq.h>
  66 #include <linux/kthread.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/interrupt.h>
  69 #include <net/net_namespace.h>
  70 #include <asm/hvcall.h>
  71 #include <linux/atomic.h>
  72 #include <asm/vio.h>
  73 #include <asm/iommu.h>
  74 #include <linux/uaccess.h>
  75 #include <asm/firmware.h>
  76 #include <linux/workqueue.h>
  77 #include <linux/if_vlan.h>
  78
  79 #include "ibmvnic.h"
  80
  81 static const char ibmvnic_driver_name[] = "ibmvnic";
  82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  83
  84 MODULE_AUTHOR("Santiago Leon");
  85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  88
  89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  90 static int ibmvnic_remove(struct vio_dev *);
  91 static void release_sub_crqs(struct ibmvnic_adapter *);
  92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  97                        union sub_crq *sub_crq);
  98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
  99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 100 static int enable_scrq_irq(struct ibmvnic_adapter *,
 101                            struct ibmvnic_sub_crq_queue *);
 102 static int disable_scrq_irq(struct ibmvnic_adapter *,
 103                             struct ibmvnic_sub_crq_queue *);
 104 static int pending_scrq(struct ibmvnic_adapter *,
 105                         struct ibmvnic_sub_crq_queue *);
 106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 107                                         struct ibmvnic_sub_crq_queue *);
 108 static int ibmvnic_poll(struct napi_struct *napi, int data);
 109 static void send_map_query(struct ibmvnic_adapter *adapter);
 110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 112 static void send_login(struct ibmvnic_adapter *adapter);
 113 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 114 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 115 static int ibmvnic_init(struct ibmvnic_adapter *);
 116 static void release_crq_queue(struct ibmvnic_adapter *);
 117
 118 struct ibmvnic_stat {
 119         char name[ETH_GSTRING_LEN];
 120         int offset;
 121 };
 122
 123 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 124                              offsetof(struct ibmvnic_statistics, stat))
 125 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 126
 127 static const struct ibmvnic_stat ibmvnic_stats[] = {
 128         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 129         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 130         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 131         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 132         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 133         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 134         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 135         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 136         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 137         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 138         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 139         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 140         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 141         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 142         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 143         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 144         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 145         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 146         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 147         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 148         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 149         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 150 };
 151
 152 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 153                           unsigned long length, unsigned long *number,
 154                           unsigned long *irq)
 155 {
 156         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 157         long rc;
 158
 159         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 160         *number = retbuf[0];
 161         *irq = retbuf[1];
 162
 163         return rc;
 164 }
 165
 166 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 167                                 struct ibmvnic_long_term_buff *ltb, int size)
 168 {
 169         struct device *dev = &adapter->vdev->dev;
 170
 171         ltb->size = size;
 172         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 173                                        GFP_KERNEL);
 174
 175         if (!ltb->buff) {
 176                 dev_err(dev, "Couldn't alloc long term buffer\n");
 177                 return -ENOMEM;
 178         }
 179         ltb->map_id = adapter->map_id;
 180         adapter->map_id++;
 181
 182         init_completion(&adapter->fw_done);
 183         send_request_map(adapter, ltb->addr,
 184                          ltb->size, ltb->map_id);
 185         wait_for_completion(&adapter->fw_done);
 186         return 0;
 187 }
 188
 189 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 190                                 struct ibmvnic_long_term_buff *ltb)
 191 {
 192         struct device *dev = &adapter->vdev->dev;
 193
 194         if (!ltb->buff)
 195                 return;
 196
 197         if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
 198             adapter->reset_reason != VNIC_RESET_MOBILITY)
 199                 send_request_unmap(adapter, ltb->map_id);
 200         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 201 }
 202
 203 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 204                               struct ibmvnic_rx_pool *pool)
 205 {
 206         int count = pool->size - atomic_read(&pool->available);
 207         struct device *dev = &adapter->vdev->dev;
 208         int buffers_added = 0;
 209         unsigned long lpar_rc;
 210         union sub_crq sub_crq;
 211         struct sk_buff *skb;
 212         unsigned int offset;
 213         dma_addr_t dma_addr;
 214         unsigned char *dst;
 215         u64 *handle_array;
 216         int shift = 0;
 217         int index;
 218         int i;
 219
 220         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 221                                       be32_to_cpu(adapter->login_rsp_buf->
 222                                       off_rxadd_subcrqs));
 223
 224         for (i = 0; i < count; ++i) {
 225                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 226                 if (!skb) {
 227                         dev_err(dev, "Couldn't replenish rx buff\n");
 228                         adapter->replenish_no_mem++;
 229                         break;
 230                 }
 231
 232                 index = pool->free_map[pool->next_free];
 233
 234                 if (pool->rx_buff[index].skb)
 235                         dev_err(dev, "Inconsistent free_map!\n");
 236
 237                 /* Copy the skb to the long term mapped DMA buffer */
 238                 offset = index * pool->buff_size;
 239                 dst = pool->long_term_buff.buff + offset;
 240                 memset(dst, 0, pool->buff_size);
 241                 dma_addr = pool->long_term_buff.addr + offset;
 242                 pool->rx_buff[index].data = dst;
 243
 244                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 245                 pool->rx_buff[index].dma = dma_addr;
 246                 pool->rx_buff[index].skb = skb;
 247                 pool->rx_buff[index].pool_index = pool->index;
 248                 pool->rx_buff[index].size = pool->buff_size;
 249
 250                 memset(&sub_crq, 0, sizeof(sub_crq));
 251                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 252                 sub_crq.rx_add.correlator =
 253                     cpu_to_be64((u64)&pool->rx_buff[index]);
 254                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 255                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 256
 257                 /* The length field of the sCRQ is defined to be 24 bits so the
 258                  * buffer size needs to be left shifted by a byte before it is
 259                  * converted to big endian to prevent the last byte from being
 260                  * truncated.
 261                  */
 262 #ifdef __LITTLE_ENDIAN__
 263                 shift = 8;
 264 #endif
 265                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 266
 267                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 268                                       &sub_crq);
 269                 if (lpar_rc != H_SUCCESS)
 270                         goto failure;
 271
 272                 buffers_added++;
 273                 adapter->replenish_add_buff_success++;
 274                 pool->next_free = (pool->next_free + 1) % pool->size;
 275         }
 276         atomic_add(buffers_added, &pool->available);
 277         return;
 278
 279 failure:
 280         dev_info(dev, "replenish pools failure\n");
 281         pool->free_map[pool->next_free] = index;
 282         pool->rx_buff[index].skb = NULL;
 283         if (!dma_mapping_error(dev, dma_addr))
 284                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 285                                  DMA_FROM_DEVICE);
 286
 287         dev_kfree_skb_any(skb);
 288         adapter->replenish_add_buff_failure++;
 289         atomic_add(buffers_added, &pool->available);
 290 }
 291
 292 static void replenish_pools(struct ibmvnic_adapter *adapter)
 293 {
 294         int i;
 295
 296         adapter->replenish_task_cycles++;
 297         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 298              i++) {
 299                 if (adapter->rx_pool[i].active)
 300                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 301         }
 302 }
 303
 304 static void release_stats_token(struct ibmvnic_adapter *adapter)
 305 {
 306         struct device *dev = &adapter->vdev->dev;
 307
 308         if (!adapter->stats_token)
 309                 return;
 310
 311         dma_unmap_single(dev, adapter->stats_token,
 312                          sizeof(struct ibmvnic_statistics),
 313                          DMA_FROM_DEVICE);
 314         adapter->stats_token = 0;
 315 }
 316
 317 static int init_stats_token(struct ibmvnic_adapter *adapter)
 318 {
 319         struct device *dev = &adapter->vdev->dev;
 320         dma_addr_t stok;
 321
 322         stok = dma_map_single(dev, &adapter->stats,
 323                               sizeof(struct ibmvnic_statistics),
 324                               DMA_FROM_DEVICE);
 325         if (dma_mapping_error(dev, stok)) {
 326                 dev_err(dev, "Couldn't map stats buffer\n");
 327                 return -1;
 328         }
 329
 330         adapter->stats_token = stok;
 331         return 0;
 332 }
 333
 334 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 335 {
 336         struct ibmvnic_rx_pool *rx_pool;
 337         int rx_scrqs;
 338         int i, j;
 339
 340         if (!adapter->rx_pool)
 341                 return;
 342
 343         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 344         for (i = 0; i < rx_scrqs; i++) {
 345                 rx_pool = &adapter->rx_pool[i];
 346
 347                 kfree(rx_pool->free_map);
 348                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 349
 350                 if (!rx_pool->rx_buff)
 351                         continue;
 352
 353                 for (j = 0; j < rx_pool->size; j++) {
 354                         if (rx_pool->rx_buff[j].skb) {
 355                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 356                                 rx_pool->rx_buff[i].skb = NULL;
 357                         }
 358                 }
 359
 360                 kfree(rx_pool->rx_buff);
 361         }
 362
 363         kfree(adapter->rx_pool);
 364         adapter->rx_pool = NULL;
 365 }
 366
 367 static int init_rx_pools(struct net_device *netdev)
 368 {
 369         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 370         struct device *dev = &adapter->vdev->dev;
 371         struct ibmvnic_rx_pool *rx_pool;
 372         int rxadd_subcrqs;
 373         u64 *size_array;
 374         int i, j;
 375
 376         rxadd_subcrqs =
 377                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 378         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 379                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 380
 381         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 382                                    sizeof(struct ibmvnic_rx_pool),
 383                                    GFP_KERNEL);
 384         if (!adapter->rx_pool) {
 385                 dev_err(dev, "Failed to allocate rx pools\n");
 386                 return -1;
 387         }
 388
 389         for (i = 0; i < rxadd_subcrqs; i++) {
 390                 rx_pool = &adapter->rx_pool[i];
 391
 392                 netdev_dbg(adapter->netdev,
 393                            "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
 394                            i, adapter->req_rx_add_entries_per_subcrq,
 395                            be64_to_cpu(size_array[i]));
 396
 397                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 398                 rx_pool->index = i;
 399                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 400                 rx_pool->active = 1;
 401
 402                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 403                                             GFP_KERNEL);
 404                 if (!rx_pool->free_map) {
 405                         release_rx_pools(adapter);
 406                         return -1;
 407                 }
 408
 409                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 410                                            sizeof(struct ibmvnic_rx_buff),
 411                                            GFP_KERNEL);
 412                 if (!rx_pool->rx_buff) {
 413                         dev_err(dev, "Couldn't alloc rx buffers\n");
 414                         release_rx_pools(adapter);
 415                         return -1;
 416                 }
 417
 418                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 419                                          rx_pool->size * rx_pool->buff_size)) {
 420                         release_rx_pools(adapter);
 421                         return -1;
 422                 }
 423
 424                 for (j = 0; j < rx_pool->size; ++j)
 425                         rx_pool->free_map[j] = j;
 426
 427                 atomic_set(&rx_pool->available, 0);
 428                 rx_pool->next_alloc = 0;
 429                 rx_pool->next_free = 0;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 436 {
 437         struct ibmvnic_tx_pool *tx_pool;
 438         int i, tx_scrqs;
 439
 440         if (!adapter->tx_pool)
 441                 return;
 442
 443         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 444         for (i = 0; i < tx_scrqs; i++) {
 445                 tx_pool = &adapter->tx_pool[i];
 446                 kfree(tx_pool->tx_buff);
 447                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 448                 kfree(tx_pool->free_map);
 449         }
 450
 451         kfree(adapter->tx_pool);
 452         adapter->tx_pool = NULL;
 453 }
 454
 455 static int init_tx_pools(struct net_device *netdev)
 456 {
 457         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 458         struct device *dev = &adapter->vdev->dev;
 459         struct ibmvnic_tx_pool *tx_pool;
 460         int tx_subcrqs;
 461         int i, j;
 462
 463         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 464         adapter->tx_pool = kcalloc(tx_subcrqs,
 465                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 466         if (!adapter->tx_pool)
 467                 return -1;
 468
 469         for (i = 0; i < tx_subcrqs; i++) {
 470                 tx_pool = &adapter->tx_pool[i];
 471                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 472                                            sizeof(struct ibmvnic_tx_buff),
 473                                            GFP_KERNEL);
 474                 if (!tx_pool->tx_buff) {
 475                         dev_err(dev, "tx pool buffer allocation failed\n");
 476                         release_tx_pools(adapter);
 477                         return -1;
 478                 }
 479
 480                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 481                                          adapter->req_tx_entries_per_subcrq *
 482                                          adapter->req_mtu)) {
 483                         release_tx_pools(adapter);
 484                         return -1;
 485                 }
 486
 487                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 488                                             sizeof(int), GFP_KERNEL);
 489                 if (!tx_pool->free_map) {
 490                         release_tx_pools(adapter);
 491                         return -1;
 492                 }
 493
 494                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 495                         tx_pool->free_map[j] = j;
 496
 497                 tx_pool->consumer_index = 0;
 498                 tx_pool->producer_index = 0;
 499         }
 500
 501         return 0;
 502 }
 503
 504 static void release_error_buffers(struct ibmvnic_adapter *adapter)
 505 {
 506         struct device *dev = &adapter->vdev->dev;
 507         struct ibmvnic_error_buff *error_buff, *tmp;
 508         unsigned long flags;
 509
 510         spin_lock_irqsave(&adapter->error_list_lock, flags);
 511         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
 512                 list_del(&error_buff->list);
 513                 dma_unmap_single(dev, error_buff->dma, error_buff->len,
 514                                  DMA_FROM_DEVICE);
 515                 kfree(error_buff->buff);
 516                 kfree(error_buff);
 517         }
 518         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
 519 }
 520
 521 static int ibmvnic_login(struct net_device *netdev)
 522 {
 523         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 524         unsigned long timeout = msecs_to_jiffies(30000);
 525         struct device *dev = &adapter->vdev->dev;
 526
 527         do {
 528                 if (adapter->renegotiate) {
 529                         adapter->renegotiate = false;
 530                         release_sub_crqs(adapter);
 531
 532                         reinit_completion(&adapter->init_done);
 533                         send_cap_queries(adapter);
 534                         if (!wait_for_completion_timeout(&adapter->init_done,
 535                                                          timeout)) {
 536                                 dev_err(dev, "Capabilities query timeout\n");
 537                                 return -1;
 538                         }
 539                 }
 540
 541                 reinit_completion(&adapter->init_done);
 542                 send_login(adapter);
 543                 if (!wait_for_completion_timeout(&adapter->init_done,
 544                                                  timeout)) {
 545                         dev_err(dev, "Login timeout\n");
 546                         return -1;
 547                 }
 548         } while (adapter->renegotiate);
 549
 550         return 0;
 551 }
 552
 553 static void release_resources(struct ibmvnic_adapter *adapter)
 554 {
 555         int i;
 556
 557         release_tx_pools(adapter);
 558         release_rx_pools(adapter);
 559
 560         release_stats_token(adapter);
 561         release_error_buffers(adapter);
 562
 563         if (adapter->napi) {
 564                 for (i = 0; i < adapter->req_rx_queues; i++) {
 565                         if (&adapter->napi[i])
 566                                 netif_napi_del(&adapter->napi[i]);
 567                 }
 568         }
 569 }
 570
 571 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
 572 {
 573         struct net_device *netdev = adapter->netdev;
 574         unsigned long timeout = msecs_to_jiffies(30000);
 575         union ibmvnic_crq crq;
 576         bool resend;
 577         int rc;
 578
 579         netdev_err(netdev, "setting link state %d\n", link_state);
 580         memset(&crq, 0, sizeof(crq));
 581         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 582         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 583         crq.logical_link_state.link_state = link_state;
 584
 585         do {
 586                 resend = false;
 587
 588                 reinit_completion(&adapter->init_done);
 589                 rc = ibmvnic_send_crq(adapter, &crq);
 590                 if (rc) {
 591                         netdev_err(netdev, "Failed to set link state\n");
 592                         return rc;
 593                 }
 594
 595                 if (!wait_for_completion_timeout(&adapter->init_done,
 596                                                  timeout)) {
 597                         netdev_err(netdev, "timeout setting link state\n");
 598                         return -1;
 599                 }
 600
 601                 if (adapter->init_done_rc == 1) {
 602                         /* Partuial success, delay and re-send */
 603                         mdelay(1000);
 604                         resend = true;
 605                 }
 606         } while (resend);
 607
 608         return 0;
 609 }
 610
 611 static int set_real_num_queues(struct net_device *netdev)
 612 {
 613         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 614         int rc;
 615
 616         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 617         if (rc) {
 618                 netdev_err(netdev, "failed to set the number of tx queues\n");
 619                 return rc;
 620         }
 621
 622         rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
 623         if (rc)
 624                 netdev_err(netdev, "failed to set the number of rx queues\n");
 625
 626         return rc;
 627 }
 628
 629 static int init_resources(struct ibmvnic_adapter *adapter)
 630 {
 631         struct net_device *netdev = adapter->netdev;
 632         int i, rc;
 633
 634         rc = set_real_num_queues(netdev);
 635         if (rc)
 636                 return rc;
 637
 638         rc = init_sub_crq_irqs(adapter);
 639         if (rc) {
 640                 netdev_err(netdev, "failed to initialize sub crq irqs\n");
 641                 return -1;
 642         }
 643
 644         rc = init_stats_token(adapter);
 645         if (rc)
 646                 return rc;
 647
 648         adapter->map_id = 1;
 649         adapter->napi = kcalloc(adapter->req_rx_queues,
 650                                 sizeof(struct napi_struct), GFP_KERNEL);
 651         if (!adapter->napi)
 652                 return -ENOMEM;
 653
 654         for (i = 0; i < adapter->req_rx_queues; i++) {
 655                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 656                                NAPI_POLL_WEIGHT);
 657         }
 658
 659         send_map_query(adapter);
 660
 661         rc = init_rx_pools(netdev);
 662         if (rc)
 663                 return rc;
 664
 665         rc = init_tx_pools(netdev);
 666         return rc;
 667 }
 668
 669 static int __ibmvnic_open(struct net_device *netdev)
 670 {
 671         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 672         enum vnic_state prev_state = adapter->state;
 673         int i, rc;
 674
 675         adapter->state = VNIC_OPENING;
 676         replenish_pools(adapter);
 677
 678         for (i = 0; i < adapter->req_rx_queues; i++)
 679                 napi_enable(&adapter->napi[i]);
 680
 681         /* We're ready to receive frames, enable the sub-crq interrupts and
 682          * set the logical link state to up
 683          */
 684         for (i = 0; i < adapter->req_rx_queues; i++) {
 685                 if (prev_state == VNIC_CLOSED)
 686                         enable_irq(adapter->rx_scrq[i]->irq);
 687                 else
 688                         enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 689         }
 690
 691         for (i = 0; i < adapter->req_tx_queues; i++) {
 692                 if (prev_state == VNIC_CLOSED)
 693                         enable_irq(adapter->tx_scrq[i]->irq);
 694                 else
 695                         enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 696         }
 697
 698         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
 699         if (rc) {
 700                 for (i = 0; i < adapter->req_rx_queues; i++)
 701                         napi_disable(&adapter->napi[i]);
 702                 release_resources(adapter);
 703                 return rc;
 704         }
 705
 706         netif_tx_start_all_queues(netdev);
 707
 708         if (prev_state == VNIC_CLOSED) {
 709                 for (i = 0; i < adapter->req_rx_queues; i++)
 710                         napi_schedule(&adapter->napi[i]);
 711         }
 712
 713         adapter->state = VNIC_OPEN;
 714         return rc;
 715 }
 716
 717 static int ibmvnic_open(struct net_device *netdev)
 718 {
 719         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 720         int rc;
 721
 722         mutex_lock(&adapter->reset_lock);
 723
 724         if (adapter->state != VNIC_CLOSED) {
 725                 rc = ibmvnic_login(netdev);
 726                 if (rc) {
 727                         mutex_unlock(&adapter->reset_lock);
 728                         return rc;
 729                 }
 730
 731                 rc = init_resources(adapter);
 732                 if (rc) {
 733                         netdev_err(netdev, "failed to initialize resources\n");
 734                         release_resources(adapter);
 735                         mutex_unlock(&adapter->reset_lock);
 736                         return rc;
 737                 }
 738         }
 739
 740         rc = __ibmvnic_open(netdev);
 741         mutex_unlock(&adapter->reset_lock);
 742
 743         return rc;
 744 }
 745
 746 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
 747 {
 748         struct ibmvnic_tx_pool *tx_pool;
 749         u64 tx_entries;
 750         int tx_scrqs;
 751         int i, j;
 752
 753         if (!adapter->tx_pool)
 754                 return;
 755
 756         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 757         tx_entries = adapter->req_tx_entries_per_subcrq;
 758
 759         /* Free any remaining skbs in the tx buffer pools */
 760         for (i = 0; i < tx_scrqs; i++) {
 761                 tx_pool = &adapter->tx_pool[i];
 762                 if (!tx_pool)
 763                         continue;
 764
 765                 for (j = 0; j < tx_entries; j++) {
 766                         if (tx_pool->tx_buff[j].skb) {
 767                                 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
 768                                 tx_pool->tx_buff[j].skb = NULL;
 769                         }
 770                 }
 771         }
 772 }
 773
 774 static int __ibmvnic_close(struct net_device *netdev)
 775 {
 776         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 777         int rc = 0;
 778         int i;
 779
 780         adapter->state = VNIC_CLOSING;
 781         netif_tx_stop_all_queues(netdev);
 782
 783         if (adapter->napi) {
 784                 for (i = 0; i < adapter->req_rx_queues; i++)
 785                         napi_disable(&adapter->napi[i]);
 786         }
 787
 788         clean_tx_pools(adapter);
 789
 790         if (adapter->tx_scrq) {
 791                 for (i = 0; i < adapter->req_tx_queues; i++)
 792                         if (adapter->tx_scrq[i]->irq)
 793                                 disable_irq(adapter->tx_scrq[i]->irq);
 794         }
 795
 796         rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
 797         if (rc)
 798                 return rc;
 799
 800         if (adapter->rx_scrq) {
 801                 for (i = 0; i < adapter->req_rx_queues; i++) {
 802                         int retries = 10;
 803
 804                         while (pending_scrq(adapter, adapter->rx_scrq[i])) {
 805                                 retries--;
 806                                 mdelay(100);
 807
 808                                 if (retries == 0)
 809                                         break;
 810                         }
 811
 812                         if (adapter->rx_scrq[i]->irq)
 813                                 disable_irq(adapter->rx_scrq[i]->irq);
 814                 }
 815         }
 816
 817         adapter->state = VNIC_CLOSED;
 818         return rc;
 819 }
 820
 821 static int ibmvnic_close(struct net_device *netdev)
 822 {
 823         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 824         int rc;
 825
 826         mutex_lock(&adapter->reset_lock);
 827         rc = __ibmvnic_close(netdev);
 828         mutex_unlock(&adapter->reset_lock);
 829
 830         return rc;
 831 }
 832
 833 /**
 834  * build_hdr_data - creates L2/L3/L4 header data buffer
 835  * @hdr_field - bitfield determining needed headers
 836  * @skb - socket buffer
 837  * @hdr_len - array of header lengths
 838  * @tot_len - total length of data
 839  *
 840  * Reads hdr_field to determine which headers are needed by firmware.
 841  * Builds a buffer containing these headers.  Saves individual header
 842  * lengths and total buffer length to be used to build descriptors.
 843  */
 844 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 845                           int *hdr_len, u8 *hdr_data)
 846 {
 847         int len = 0;
 848         u8 *hdr;
 849
 850         hdr_len[0] = sizeof(struct ethhdr);
 851
 852         if (skb->protocol == htons(ETH_P_IP)) {
 853                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 854                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 855                         hdr_len[2] = tcp_hdrlen(skb);
 856                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 857                         hdr_len[2] = sizeof(struct udphdr);
 858         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 859                 hdr_len[1] = sizeof(struct ipv6hdr);
 860                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 861                         hdr_len[2] = tcp_hdrlen(skb);
 862                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 863                         hdr_len[2] = sizeof(struct udphdr);
 864         }
 865
 866         memset(hdr_data, 0, 120);
 867         if ((hdr_field >> 6) & 1) {
 868                 hdr = skb_mac_header(skb);
 869                 memcpy(hdr_data, hdr, hdr_len[0]);
 870                 len += hdr_len[0];
 871         }
 872
 873         if ((hdr_field >> 5) & 1) {
 874                 hdr = skb_network_header(skb);
 875                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 876                 len += hdr_len[1];
 877         }
 878
 879         if ((hdr_field >> 4) & 1) {
 880                 hdr = skb_transport_header(skb);
 881                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 882                 len += hdr_len[2];
 883         }
 884         return len;
 885 }
 886
 887 /**
 888  * create_hdr_descs - create header and header extension descriptors
 889  * @hdr_field - bitfield determining needed headers
 890  * @data - buffer containing header data
 891  * @len - length of data buffer
 892  * @hdr_len - array of individual header lengths
 893  * @scrq_arr - descriptor array
 894  *
 895  * Creates header and, if needed, header extension descriptors and
 896  * places them in a descriptor array, scrq_arr
 897  */
 898
 899 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 900                              union sub_crq *scrq_arr)
 901 {
 902         union sub_crq hdr_desc;
 903         int tmp_len = len;
 904         u8 *data, *cur;
 905         int tmp;
 906
 907         while (tmp_len > 0) {
 908                 cur = hdr_data + len - tmp_len;
 909
 910                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 911                 if (cur != hdr_data) {
 912                         data = hdr_desc.hdr_ext.data;
 913                         tmp = tmp_len > 29 ? 29 : tmp_len;
 914                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 915                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 916                         hdr_desc.hdr_ext.len = tmp;
 917                 } else {
 918                         data = hdr_desc.hdr.data;
 919                         tmp = tmp_len > 24 ? 24 : tmp_len;
 920                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 921                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 922                         hdr_desc.hdr.len = tmp;
 923                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 924                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 925                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 926                         hdr_desc.hdr.flag = hdr_field << 1;
 927                 }
 928                 memcpy(data, cur, tmp);
 929                 tmp_len -= tmp;
 930                 *scrq_arr = hdr_desc;
 931                 scrq_arr++;
 932         }
 933 }
 934
 935 /**
 936  * build_hdr_descs_arr - build a header descriptor array
 937  * @skb - socket buffer
 938  * @num_entries - number of descriptors to be sent
 939  * @subcrq - first TX descriptor
 940  * @hdr_field - bit field determining which headers will be sent
 941  *
 942  * This function will build a TX descriptor array with applicable
 943  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 944  */
 945
 946 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 947                                 int *num_entries, u8 hdr_field)
 948 {
 949         int hdr_len[3] = {0, 0, 0};
 950         int tot_len, len;
 951         u8 *hdr_data = txbuff->hdr_data;
 952
 953         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 954                                  txbuff->hdr_data);
 955         len = tot_len;
 956         len -= 24;
 957         if (len > 0)
 958                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 959         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 960                          txbuff->indir_arr + 1);
 961 }
 962
 963 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 964 {
 965         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 966         int queue_num = skb_get_queue_mapping(skb);
 967         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 968         struct device *dev = &adapter->vdev->dev;
 969         struct ibmvnic_tx_buff *tx_buff = NULL;
 970         struct ibmvnic_sub_crq_queue *tx_scrq;
 971         struct ibmvnic_tx_pool *tx_pool;
 972         unsigned int tx_send_failed = 0;
 973         unsigned int tx_map_failed = 0;
 974         unsigned int tx_dropped = 0;
 975         unsigned int tx_packets = 0;
 976         unsigned int tx_bytes = 0;
 977         dma_addr_t data_dma_addr;
 978         struct netdev_queue *txq;
 979         unsigned long lpar_rc;
 980         union sub_crq tx_crq;
 981         unsigned int offset;
 982         int num_entries = 1;
 983         unsigned char *dst;
 984         u64 *handle_array;
 985         int index = 0;
 986         int ret = 0;
 987
 988         if (adapter->resetting) {
 989                 if (!netif_subqueue_stopped(netdev, skb))
 990                         netif_stop_subqueue(netdev, queue_num);
 991                 dev_kfree_skb_any(skb);
 992
 993                 tx_send_failed++;
 994                 tx_dropped++;
 995                 ret = NETDEV_TX_OK;
 996                 goto out;
 997         }
 998
 999         tx_pool = &adapter->tx_pool[queue_num];
1000         tx_scrq = adapter->tx_scrq[queue_num];
1001         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1002         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1003                 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1004
1005         index = tx_pool->free_map[tx_pool->consumer_index];
1006         offset = index * adapter->req_mtu;
1007         dst = tx_pool->long_term_buff.buff + offset;
1008         memset(dst, 0, adapter->req_mtu);
1009         skb_copy_from_linear_data(skb, dst, skb->len);
1010         data_dma_addr = tx_pool->long_term_buff.addr + offset;
1011
1012         tx_pool->consumer_index =
1013             (tx_pool->consumer_index + 1) %
1014                 adapter->req_tx_entries_per_subcrq;
1015
1016         tx_buff = &tx_pool->tx_buff[index];
1017         tx_buff->skb = skb;
1018         tx_buff->data_dma[0] = data_dma_addr;
1019         tx_buff->data_len[0] = skb->len;
1020         tx_buff->index = index;
1021         tx_buff->pool_index = queue_num;
1022         tx_buff->last_frag = true;
1023
1024         memset(&tx_crq, 0, sizeof(tx_crq));
1025         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1026         tx_crq.v1.type = IBMVNIC_TX_DESC;
1027         tx_crq.v1.n_crq_elem = 1;
1028         tx_crq.v1.n_sge = 1;
1029         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1030         tx_crq.v1.correlator = cpu_to_be32(index);
1031         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1032         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1033         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1034
1035         if (adapter->vlan_header_insertion) {
1036                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1037                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1038         }
1039
1040         if (skb->protocol == htons(ETH_P_IP)) {
1041                 if (ip_hdr(skb)->version == 4)
1042                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1043                 else if (ip_hdr(skb)->version == 6)
1044                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1045
1046                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1047                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1048                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
1049                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1050         }
1051
1052         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1053                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1054                 hdrs += 2;
1055         }
1056         /* determine if l2/3/4 headers are sent to firmware */
1057         if ((*hdrs >> 7) & 1 &&
1058             (skb->protocol == htons(ETH_P_IP) ||
1059              skb->protocol == htons(ETH_P_IPV6))) {
1060                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1061                 tx_crq.v1.n_crq_elem = num_entries;
1062                 tx_buff->indir_arr[0] = tx_crq;
1063                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1064                                                     sizeof(tx_buff->indir_arr),
1065                                                     DMA_TO_DEVICE);
1066                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1067                         dev_kfree_skb_any(skb);
1068                         tx_buff->skb = NULL;
1069                         if (!firmware_has_feature(FW_FEATURE_CMO))
1070                                 dev_err(dev, "tx: unable to map descriptor array\n");
1071                         tx_map_failed++;
1072                         tx_dropped++;
1073                         ret = NETDEV_TX_OK;
1074                         goto out;
1075                 }
1076                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1077                                                (u64)tx_buff->indir_dma,
1078                                                (u64)num_entries);
1079         } else {
1080                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1081                                       &tx_crq);
1082         }
1083         if (lpar_rc != H_SUCCESS) {
1084                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1085
1086                 if (tx_pool->consumer_index == 0)
1087                         tx_pool->consumer_index =
1088                                 adapter->req_tx_entries_per_subcrq - 1;
1089                 else
1090                         tx_pool->consumer_index--;
1091
1092                 dev_kfree_skb_any(skb);
1093                 tx_buff->skb = NULL;
1094
1095                 if (lpar_rc == H_CLOSED)
1096                         netif_stop_subqueue(netdev, queue_num);
1097
1098                 tx_send_failed++;
1099                 tx_dropped++;
1100                 ret = NETDEV_TX_OK;
1101                 goto out;
1102         }
1103
1104         if (atomic_inc_return(&tx_scrq->used)
1105                                         >= adapter->req_tx_entries_per_subcrq) {
1106                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1107                 netif_stop_subqueue(netdev, queue_num);
1108         }
1109
1110         tx_packets++;
1111         tx_bytes += skb->len;
1112         txq->trans_start = jiffies;
1113         ret = NETDEV_TX_OK;
1114
1115 out:
1116         netdev->stats.tx_dropped += tx_dropped;
1117         netdev->stats.tx_bytes += tx_bytes;
1118         netdev->stats.tx_packets += tx_packets;
1119         adapter->tx_send_failed += tx_send_failed;
1120         adapter->tx_map_failed += tx_map_failed;
1121
1122         return ret;
1123 }
1124
1125 static void ibmvnic_set_multi(struct net_device *netdev)
1126 {
1127         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1128         struct netdev_hw_addr *ha;
1129         union ibmvnic_crq crq;
1130
1131         memset(&crq, 0, sizeof(crq));
1132         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1133         crq.request_capability.cmd = REQUEST_CAPABILITY;
1134
1135         if (netdev->flags & IFF_PROMISC) {
1136                 if (!adapter->promisc_supported)
1137                         return;
1138         } else {
1139                 if (netdev->flags & IFF_ALLMULTI) {
1140                         /* Accept all multicast */
1141                         memset(&crq, 0, sizeof(crq));
1142                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1143                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1144                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1145                         ibmvnic_send_crq(adapter, &crq);
1146                 } else if (netdev_mc_empty(netdev)) {
1147                         /* Reject all multicast */
1148                         memset(&crq, 0, sizeof(crq));
1149                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1150                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1151                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1152                         ibmvnic_send_crq(adapter, &crq);
1153                 } else {
1154                         /* Accept one or more multicast(s) */
1155                         netdev_for_each_mc_addr(ha, netdev) {
1156                                 memset(&crq, 0, sizeof(crq));
1157                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1158                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1159                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1160                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1161                                                 ha->addr);
1162                                 ibmvnic_send_crq(adapter, &crq);
1163                         }
1164                 }
1165         }
1166 }
1167
1168 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1169 {
1170         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1171         struct sockaddr *addr = p;
1172         union ibmvnic_crq crq;
1173
1174         if (!is_valid_ether_addr(addr->sa_data))
1175                 return -EADDRNOTAVAIL;
1176
1177         memset(&crq, 0, sizeof(crq));
1178         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1179         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1180         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1181         ibmvnic_send_crq(adapter, &crq);
1182         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1183         return 0;
1184 }
1185
1186 /**
1187  * do_reset returns zero if we are able to keep processing reset events, or
1188  * non-zero if we hit a fatal error and must halt.
1189  */
1190 static int do_reset(struct ibmvnic_adapter *adapter,
1191                     struct ibmvnic_rwi *rwi, u32 reset_state)
1192 {
1193         struct net_device *netdev = adapter->netdev;
1194         int i, rc;
1195
1196         netif_carrier_off(netdev);
1197         adapter->reset_reason = rwi->reset_reason;
1198
1199         if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1200                 rc = ibmvnic_reenable_crq_queue(adapter);
1201                 if (rc)
1202                         return 0;
1203         }
1204
1205         rc = __ibmvnic_close(netdev);
1206         if (rc)
1207                 return rc;
1208
1209         /* remove the closed state so when we call open it appears
1210          * we are coming from the probed state.
1211          */
1212         adapter->state = VNIC_PROBED;
1213
1214         release_resources(adapter);
1215         release_sub_crqs(adapter);
1216         release_crq_queue(adapter);
1217
1218         rc = ibmvnic_init(adapter);
1219         if (rc)
1220                 return 0;
1221
1222         /* If the adapter was in PROBE state prior to the reset, exit here. */
1223         if (reset_state == VNIC_PROBED)
1224                 return 0;
1225
1226         rc = ibmvnic_login(netdev);
1227         if (rc) {
1228                 adapter->state = VNIC_PROBED;
1229                 return 0;
1230         }
1231
1232         rtnl_lock();
1233         rc = init_resources(adapter);
1234         rtnl_unlock();
1235         if (rc)
1236                 return rc;
1237
1238         if (reset_state == VNIC_CLOSED)
1239                 return 0;
1240
1241         rc = __ibmvnic_open(netdev);
1242         if (rc) {
1243                 if (list_empty(&adapter->rwi_list))
1244                         adapter->state = VNIC_CLOSED;
1245                 else
1246                         adapter->state = reset_state;
1247
1248                 return 0;
1249         }
1250
1251         netif_carrier_on(netdev);
1252
1253         /* kick napi */
1254         for (i = 0; i < adapter->req_rx_queues; i++)
1255                 napi_schedule(&adapter->napi[i]);
1256
1257         return 0;
1258 }
1259
1260 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1261 {
1262         struct ibmvnic_rwi *rwi;
1263
1264         mutex_lock(&adapter->rwi_lock);
1265
1266         if (!list_empty(&adapter->rwi_list)) {
1267                 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1268                                        list);
1269                 list_del(&rwi->list);
1270         } else {
1271                 rwi = NULL;
1272         }
1273
1274         mutex_unlock(&adapter->rwi_lock);
1275         return rwi;
1276 }
1277
1278 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1279 {
1280         struct ibmvnic_rwi *rwi;
1281
1282         rwi = get_next_rwi(adapter);
1283         while (rwi) {
1284                 kfree(rwi);
1285                 rwi = get_next_rwi(adapter);
1286         }
1287 }
1288
1289 static void __ibmvnic_reset(struct work_struct *work)
1290 {
1291         struct ibmvnic_rwi *rwi;
1292         struct ibmvnic_adapter *adapter;
1293         struct net_device *netdev;
1294         u32 reset_state;
1295         int rc;
1296
1297         adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1298         netdev = adapter->netdev;
1299
1300         mutex_lock(&adapter->reset_lock);
1301         adapter->resetting = true;
1302         reset_state = adapter->state;
1303
1304         rwi = get_next_rwi(adapter);
1305         while (rwi) {
1306                 rc = do_reset(adapter, rwi, reset_state);
1307                 kfree(rwi);
1308                 if (rc)
1309                         break;
1310
1311                 rwi = get_next_rwi(adapter);
1312         }
1313
1314         if (rc) {
1315                 free_all_rwi(adapter);
1316                 return;
1317         }
1318
1319         adapter->resetting = false;
1320         mutex_unlock(&adapter->reset_lock);
1321 }
1322
1323 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1324                           enum ibmvnic_reset_reason reason)
1325 {
1326         struct ibmvnic_rwi *rwi, *tmp;
1327         struct net_device *netdev = adapter->netdev;
1328         struct list_head *entry;
1329
1330         if (adapter->state == VNIC_REMOVING ||
1331             adapter->state == VNIC_REMOVED) {
1332                 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1333                 return;
1334         }
1335
1336         mutex_lock(&adapter->rwi_lock);
1337
1338         list_for_each(entry, &adapter->rwi_list) {
1339                 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1340                 if (tmp->reset_reason == reason) {
1341                         netdev_err(netdev, "Matching reset found, skipping\n");
1342                         mutex_unlock(&adapter->rwi_lock);
1343                         return;
1344                 }
1345         }
1346
1347         rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1348         if (!rwi) {
1349                 mutex_unlock(&adapter->rwi_lock);
1350                 ibmvnic_close(netdev);
1351                 return;
1352         }
1353
1354         rwi->reset_reason = reason;
1355         list_add_tail(&rwi->list, &adapter->rwi_list);
1356         mutex_unlock(&adapter->rwi_lock);
1357         schedule_work(&adapter->ibmvnic_reset);
1358 }
1359
1360 static void ibmvnic_tx_timeout(struct net_device *dev)
1361 {
1362         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1363
1364         ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1365 }
1366
1367 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1368                                   struct ibmvnic_rx_buff *rx_buff)
1369 {
1370         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1371
1372         rx_buff->skb = NULL;
1373
1374         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1375         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1376
1377         atomic_dec(&pool->available);
1378 }
1379
1380 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1381 {
1382         struct net_device *netdev = napi->dev;
1383         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1384         int scrq_num = (int)(napi - adapter->napi);
1385         int frames_processed = 0;
1386 restart_poll:
1387         while (frames_processed < budget) {
1388                 struct sk_buff *skb;
1389                 struct ibmvnic_rx_buff *rx_buff;
1390                 union sub_crq *next;
1391                 u32 length;
1392                 u16 offset;
1393                 u8 flags = 0;
1394
1395                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1396                         break;
1397                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1398                 rx_buff =
1399                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1400                                                           rx_comp.correlator);
1401                 /* do error checking */
1402                 if (next->rx_comp.rc) {
1403                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1404                         /* free the entry */
1405                         next->rx_comp.first = 0;
1406                         remove_buff_from_pool(adapter, rx_buff);
1407                         continue;
1408                 }
1409
1410                 length = be32_to_cpu(next->rx_comp.len);
1411                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1412                 flags = next->rx_comp.flags;
1413                 skb = rx_buff->skb;
1414                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1415                                         length);
1416
1417                 /* VLAN Header has been stripped by the system firmware and
1418                  * needs to be inserted by the driver
1419                  */
1420                 if (adapter->rx_vlan_header_insertion &&
1421                     (flags & IBMVNIC_VLAN_STRIPPED))
1422                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1423                                                ntohs(next->rx_comp.vlan_tci));
1424
1425                 /* free the entry */
1426                 next->rx_comp.first = 0;
1427                 remove_buff_from_pool(adapter, rx_buff);
1428
1429                 skb_put(skb, length);
1430                 skb->protocol = eth_type_trans(skb, netdev);
1431                 skb_record_rx_queue(skb, scrq_num);
1432
1433                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1434                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1435                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1436                 }
1437
1438                 length = skb->len;
1439                 napi_gro_receive(napi, skb); /* send it up */
1440                 netdev->stats.rx_packets++;
1441                 netdev->stats.rx_bytes += length;
1442                 frames_processed++;
1443         }
1444         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1445
1446         if (frames_processed < budget) {
1447                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1448                 napi_complete_done(napi, frames_processed);
1449                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1450                     napi_reschedule(napi)) {
1451                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1452                         goto restart_poll;
1453                 }
1454         }
1455         return frames_processed;
1456 }
1457
1458 #ifdef CONFIG_NET_POLL_CONTROLLER
1459 static void ibmvnic_netpoll_controller(struct net_device *dev)
1460 {
1461         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1462         int i;
1463
1464         replenish_pools(netdev_priv(dev));
1465         for (i = 0; i < adapter->req_rx_queues; i++)
1466                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1467                                      adapter->rx_scrq[i]);
1468 }
1469 #endif
1470
1471 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1472 {
1473         return -EOPNOTSUPP;
1474 }
1475
1476 static const struct net_device_ops ibmvnic_netdev_ops = {
1477         .ndo_open               = ibmvnic_open,
1478         .ndo_stop               = ibmvnic_close,
1479         .ndo_start_xmit         = ibmvnic_xmit,
1480         .ndo_set_rx_mode        = ibmvnic_set_multi,
1481         .ndo_set_mac_address    = ibmvnic_set_mac,
1482         .ndo_validate_addr      = eth_validate_addr,
1483         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1484 #ifdef CONFIG_NET_POLL_CONTROLLER
1485         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1486 #endif
1487         .ndo_change_mtu         = ibmvnic_change_mtu,
1488 };
1489
1490 /* ethtool functions */
1491
1492 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1493                                       struct ethtool_link_ksettings *cmd)
1494 {
1495         u32 supported, advertising;
1496
1497         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1498                           SUPPORTED_FIBRE);
1499         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1500                             ADVERTISED_FIBRE);
1501         cmd->base.speed = SPEED_1000;
1502         cmd->base.duplex = DUPLEX_FULL;
1503         cmd->base.port = PORT_FIBRE;
1504         cmd->base.phy_address = 0;
1505         cmd->base.autoneg = AUTONEG_ENABLE;
1506
1507         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1508                                                 supported);
1509         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1510                                                 advertising);
1511
1512         return 0;
1513 }
1514
1515 static void ibmvnic_get_drvinfo(struct net_device *dev,
1516                                 struct ethtool_drvinfo *info)
1517 {
1518         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1519         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1520 }
1521
1522 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1523 {
1524         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1525
1526         return adapter->msg_enable;
1527 }
1528
1529 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1530 {
1531         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1532
1533         adapter->msg_enable = data;
1534 }
1535
1536 static u32 ibmvnic_get_link(struct net_device *netdev)
1537 {
1538         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1539
1540         /* Don't need to send a query because we request a logical link up at
1541          * init and then we wait for link state indications
1542          */
1543         return adapter->logical_link_state;
1544 }
1545
1546 static void ibmvnic_get_ringparam(struct net_device *netdev,
1547                                   struct ethtool_ringparam *ring)
1548 {
1549         ring->rx_max_pending = 0;
1550         ring->tx_max_pending = 0;
1551         ring->rx_mini_max_pending = 0;
1552         ring->rx_jumbo_max_pending = 0;
1553         ring->rx_pending = 0;
1554         ring->tx_pending = 0;
1555         ring->rx_mini_pending = 0;
1556         ring->rx_jumbo_pending = 0;
1557 }
1558
1559 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1560 {
1561         int i;
1562
1563         if (stringset != ETH_SS_STATS)
1564                 return;
1565
1566         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1567                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1568 }
1569
1570 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1571 {
1572         switch (sset) {
1573         case ETH_SS_STATS:
1574                 return ARRAY_SIZE(ibmvnic_stats);
1575         default:
1576                 return -EOPNOTSUPP;
1577         }
1578 }
1579
1580 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1581                                       struct ethtool_stats *stats, u64 *data)
1582 {
1583         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1584         union ibmvnic_crq crq;
1585         int i;
1586
1587         memset(&crq, 0, sizeof(crq));
1588         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1589         crq.request_statistics.cmd = REQUEST_STATISTICS;
1590         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1591         crq.request_statistics.len =
1592             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1593
1594         /* Wait for data to be written */
1595         init_completion(&adapter->stats_done);
1596         ibmvnic_send_crq(adapter, &crq);
1597         wait_for_completion(&adapter->stats_done);
1598
1599         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1600                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1601 }
1602
1603 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1604         .get_drvinfo            = ibmvnic_get_drvinfo,
1605         .get_msglevel           = ibmvnic_get_msglevel,
1606         .set_msglevel           = ibmvnic_set_msglevel,
1607         .get_link               = ibmvnic_get_link,
1608         .get_ringparam          = ibmvnic_get_ringparam,
1609         .get_strings            = ibmvnic_get_strings,
1610         .get_sset_count         = ibmvnic_get_sset_count,
1611         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1612         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1613 };
1614
1615 /* Routines for managing CRQs/sCRQs  */
1616
1617 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1618                                   struct ibmvnic_sub_crq_queue *scrq)
1619 {
1620         struct device *dev = &adapter->vdev->dev;
1621         long rc;
1622
1623         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1624
1625         /* Close the sub-crqs */
1626         do {
1627                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1628                                         adapter->vdev->unit_address,
1629                                         scrq->crq_num);
1630         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1631
1632         if (rc) {
1633                 netdev_err(adapter->netdev,
1634                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
1635                            scrq->crq_num, rc);
1636         }
1637
1638         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1639                          DMA_BIDIRECTIONAL);
1640         free_pages((unsigned long)scrq->msgs, 2);
1641         kfree(scrq);
1642 }
1643
1644 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1645                                                         *adapter)
1646 {
1647         struct device *dev = &adapter->vdev->dev;
1648         struct ibmvnic_sub_crq_queue *scrq;
1649         int rc;
1650
1651         scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
1652         if (!scrq)
1653                 return NULL;
1654
1655         scrq->msgs =
1656                 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
1657         if (!scrq->msgs) {
1658                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1659                 goto zero_page_failed;
1660         }
1661
1662         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1663                                          DMA_BIDIRECTIONAL);
1664         if (dma_mapping_error(dev, scrq->msg_token)) {
1665                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1666                 goto map_failed;
1667         }
1668
1669         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1670                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1671
1672         if (rc == H_RESOURCE)
1673                 rc = ibmvnic_reset_crq(adapter);
1674
1675         if (rc == H_CLOSED) {
1676                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1677         } else if (rc) {
1678                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1679                 goto reg_failed;
1680         }
1681
1682         scrq->adapter = adapter;
1683         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1684         spin_lock_init(&scrq->lock);
1685
1686         netdev_dbg(adapter->netdev,
1687                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1688                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1689
1690         return scrq;
1691
1692 reg_failed:
1693         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1694                          DMA_BIDIRECTIONAL);
1695 map_failed:
1696         free_pages((unsigned long)scrq->msgs, 2);
1697 zero_page_failed:
1698         kfree(scrq);
1699
1700         return NULL;
1701 }
1702
1703 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1704 {
1705         int i;
1706
1707         if (adapter->tx_scrq) {
1708                 for (i = 0; i < adapter->req_tx_queues; i++) {
1709                         if (!adapter->tx_scrq[i])
1710                                 continue;
1711
1712                         if (adapter->tx_scrq[i]->irq) {
1713                                 free_irq(adapter->tx_scrq[i]->irq,
1714                                          adapter->tx_scrq[i]);
1715                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1716                                 adapter->tx_scrq[i]->irq = 0;
1717                         }
1718
1719                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1720                 }
1721
1722                 kfree(adapter->tx_scrq);
1723                 adapter->tx_scrq = NULL;
1724         }
1725
1726         if (adapter->rx_scrq) {
1727                 for (i = 0; i < adapter->req_rx_queues; i++) {
1728                         if (!adapter->rx_scrq[i])
1729                                 continue;
1730
1731                         if (adapter->rx_scrq[i]->irq) {
1732                                 free_irq(adapter->rx_scrq[i]->irq,
1733                                          adapter->rx_scrq[i]);
1734                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1735                                 adapter->rx_scrq[i]->irq = 0;
1736                         }
1737
1738                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1739                 }
1740
1741                 kfree(adapter->rx_scrq);
1742                 adapter->rx_scrq = NULL;
1743         }
1744 }
1745
1746 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1747                             struct ibmvnic_sub_crq_queue *scrq)
1748 {
1749         struct device *dev = &adapter->vdev->dev;
1750         unsigned long rc;
1751
1752         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1753                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1754         if (rc)
1755                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1756                         scrq->hw_irq, rc);
1757         return rc;
1758 }
1759
1760 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1761                            struct ibmvnic_sub_crq_queue *scrq)
1762 {
1763         struct device *dev = &adapter->vdev->dev;
1764         unsigned long rc;
1765
1766         if (scrq->hw_irq > 0x100000000ULL) {
1767                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1768                 return 1;
1769         }
1770
1771         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1772                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1773         if (rc)
1774                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1775                         scrq->hw_irq, rc);
1776         return rc;
1777 }
1778
1779 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1780                                struct ibmvnic_sub_crq_queue *scrq)
1781 {
1782         struct device *dev = &adapter->vdev->dev;
1783         struct ibmvnic_tx_buff *txbuff;
1784         union sub_crq *next;
1785         int index;
1786         int i, j;
1787         u8 first;
1788
1789 restart_loop:
1790         while (pending_scrq(adapter, scrq)) {
1791                 unsigned int pool = scrq->pool_index;
1792
1793                 next = ibmvnic_next_scrq(adapter, scrq);
1794                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1795                         if (next->tx_comp.rcs[i]) {
1796                                 dev_err(dev, "tx error %x\n",
1797                                         next->tx_comp.rcs[i]);
1798                                 continue;
1799                         }
1800                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1801                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1802
1803                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1804                                 if (!txbuff->data_dma[j])
1805                                         continue;
1806
1807                                 txbuff->data_dma[j] = 0;
1808                         }
1809                         /* if sub_crq was sent indirectly */
1810                         first = txbuff->indir_arr[0].generic.first;
1811                         if (first == IBMVNIC_CRQ_CMD) {
1812                                 dma_unmap_single(dev, txbuff->indir_dma,
1813                                                  sizeof(txbuff->indir_arr),
1814                                                  DMA_TO_DEVICE);
1815                         }
1816
1817                         if (txbuff->last_frag) {
1818                                 dev_kfree_skb_any(txbuff->skb);
1819                                 txbuff->skb = NULL;
1820                         }
1821
1822                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1823                                                      producer_index] = index;
1824                         adapter->tx_pool[pool].producer_index =
1825                             (adapter->tx_pool[pool].producer_index + 1) %
1826                             adapter->req_tx_entries_per_subcrq;
1827                 }
1828                 /* remove tx_comp scrq*/
1829                 next->tx_comp.first = 0;
1830
1831                 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
1832                     (adapter->req_tx_entries_per_subcrq / 2) &&
1833                     __netif_subqueue_stopped(adapter->netdev,
1834                                              scrq->pool_index)) {
1835                         netif_wake_subqueue(adapter->netdev, scrq->pool_index);
1836                         netdev_info(adapter->netdev, "Started queue %d\n",
1837                                     scrq->pool_index);
1838                 }
1839         }
1840
1841         enable_scrq_irq(adapter, scrq);
1842
1843         if (pending_scrq(adapter, scrq)) {
1844                 disable_scrq_irq(adapter, scrq);
1845                 goto restart_loop;
1846         }
1847
1848         return 0;
1849 }
1850
1851 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1852 {
1853         struct ibmvnic_sub_crq_queue *scrq = instance;
1854         struct ibmvnic_adapter *adapter = scrq->adapter;
1855
1856         disable_scrq_irq(adapter, scrq);
1857         ibmvnic_complete_tx(adapter, scrq);
1858
1859         return IRQ_HANDLED;
1860 }
1861
1862 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1863 {
1864         struct ibmvnic_sub_crq_queue *scrq = instance;
1865         struct ibmvnic_adapter *adapter = scrq->adapter;
1866
1867         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1868                 disable_scrq_irq(adapter, scrq);
1869                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1870         }
1871
1872         return IRQ_HANDLED;
1873 }
1874
1875 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1876 {
1877         struct device *dev = &adapter->vdev->dev;
1878         struct ibmvnic_sub_crq_queue *scrq;
1879         int i = 0, j = 0;
1880         int rc = 0;
1881
1882         for (i = 0; i < adapter->req_tx_queues; i++) {
1883                 scrq = adapter->tx_scrq[i];
1884                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1885
1886                 if (!scrq->irq) {
1887                         rc = -EINVAL;
1888                         dev_err(dev, "Error mapping irq\n");
1889                         goto req_tx_irq_failed;
1890                 }
1891
1892                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1893                                  0, "ibmvnic_tx", scrq);
1894
1895                 if (rc) {
1896                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1897                                 scrq->irq, rc);
1898                         irq_dispose_mapping(scrq->irq);
1899                         goto req_rx_irq_failed;
1900                 }
1901         }
1902
1903         for (i = 0; i < adapter->req_rx_queues; i++) {
1904                 scrq = adapter->rx_scrq[i];
1905                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1906                 if (!scrq->irq) {
1907                         rc = -EINVAL;
1908                         dev_err(dev, "Error mapping irq\n");
1909                         goto req_rx_irq_failed;
1910                 }
1911                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1912                                  0, "ibmvnic_rx", scrq);
1913                 if (rc) {
1914                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1915                                 scrq->irq, rc);
1916                         irq_dispose_mapping(scrq->irq);
1917                         goto req_rx_irq_failed;
1918                 }
1919         }
1920         return rc;
1921
1922 req_rx_irq_failed:
1923         for (j = 0; j < i; j++) {
1924                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1925                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1926         }
1927         i = adapter->req_tx_queues;
1928 req_tx_irq_failed:
1929         for (j = 0; j < i; j++) {
1930                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1931                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1932         }
1933         release_sub_crqs(adapter);
1934         return rc;
1935 }
1936
1937 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
1938 {
1939         struct device *dev = &adapter->vdev->dev;
1940         struct ibmvnic_sub_crq_queue **allqueues;
1941         int registered_queues = 0;
1942         int total_queues;
1943         int more = 0;
1944         int i;
1945
1946         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1947
1948         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
1949         if (!allqueues)
1950                 return -1;
1951
1952         for (i = 0; i < total_queues; i++) {
1953                 allqueues[i] = init_sub_crq_queue(adapter);
1954                 if (!allqueues[i]) {
1955                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1956                         break;
1957                 }
1958                 registered_queues++;
1959         }
1960
1961         /* Make sure we were able to register the minimum number of queues */
1962         if (registered_queues <
1963             adapter->min_tx_queues + adapter->min_rx_queues) {
1964                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1965                 goto tx_failed;
1966         }
1967
1968         /* Distribute the failed allocated queues*/
1969         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1970                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1971                 switch (i % 3) {
1972                 case 0:
1973                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1974                                 adapter->req_rx_queues--;
1975                         else
1976                                 more++;
1977                         break;
1978                 case 1:
1979                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1980                                 adapter->req_tx_queues--;
1981                         else
1982                                 more++;
1983                         break;
1984                 }
1985         }
1986
1987         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1988                                    sizeof(*adapter->tx_scrq), GFP_KERNEL);
1989         if (!adapter->tx_scrq)
1990                 goto tx_failed;
1991
1992         for (i = 0; i < adapter->req_tx_queues; i++) {
1993                 adapter->tx_scrq[i] = allqueues[i];
1994                 adapter->tx_scrq[i]->pool_index = i;
1995         }
1996
1997         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1998                                    sizeof(*adapter->rx_scrq), GFP_KERNEL);
1999         if (!adapter->rx_scrq)
2000                 goto rx_failed;
2001
2002         for (i = 0; i < adapter->req_rx_queues; i++) {
2003                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2004                 adapter->rx_scrq[i]->scrq_num = i;
2005         }
2006
2007         kfree(allqueues);
2008         return 0;
2009
2010 rx_failed:
2011         kfree(adapter->tx_scrq);
2012         adapter->tx_scrq = NULL;
2013 tx_failed:
2014         for (i = 0; i < registered_queues; i++)
2015                 release_sub_crq_queue(adapter, allqueues[i]);
2016         kfree(allqueues);
2017         return -1;
2018 }
2019
2020 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2021 {
2022         struct device *dev = &adapter->vdev->dev;
2023         union ibmvnic_crq crq;
2024
2025         if (!retry) {
2026                 /* Sub-CRQ entries are 32 byte long */
2027                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2028
2029                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2030                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
2031                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2032                         return;
2033                 }
2034
2035                 /* Get the minimum between the queried max and the entries
2036                  * that fit in our PAGE_SIZE
2037                  */
2038                 adapter->req_tx_entries_per_subcrq =
2039                     adapter->max_tx_entries_per_subcrq > entries_page ?
2040                     entries_page : adapter->max_tx_entries_per_subcrq;
2041                 adapter->req_rx_add_entries_per_subcrq =
2042                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
2043                     entries_page : adapter->max_rx_add_entries_per_subcrq;
2044
2045                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
2046                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
2047                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2048
2049                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2050         }
2051
2052         memset(&crq, 0, sizeof(crq));
2053         crq.request_capability.first = IBMVNIC_CRQ_CMD;
2054         crq.request_capability.cmd = REQUEST_CAPABILITY;
2055
2056         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2057         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2058         atomic_inc(&adapter->running_cap_crqs);
2059         ibmvnic_send_crq(adapter, &crq);
2060
2061         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2062         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2063         atomic_inc(&adapter->running_cap_crqs);
2064         ibmvnic_send_crq(adapter, &crq);
2065
2066         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2067         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2068         atomic_inc(&adapter->running_cap_crqs);
2069         ibmvnic_send_crq(adapter, &crq);
2070
2071         crq.request_capability.capability =
2072             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2073         crq.request_capability.number =
2074             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2075         atomic_inc(&adapter->running_cap_crqs);
2076         ibmvnic_send_crq(adapter, &crq);
2077
2078         crq.request_capability.capability =
2079             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2080         crq.request_capability.number =
2081             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2082         atomic_inc(&adapter->running_cap_crqs);
2083         ibmvnic_send_crq(adapter, &crq);
2084
2085         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2086         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2087         atomic_inc(&adapter->running_cap_crqs);
2088         ibmvnic_send_crq(adapter, &crq);
2089
2090         if (adapter->netdev->flags & IFF_PROMISC) {
2091                 if (adapter->promisc_supported) {
2092                         crq.request_capability.capability =
2093                             cpu_to_be16(PROMISC_REQUESTED);
2094                         crq.request_capability.number = cpu_to_be64(1);
2095                         atomic_inc(&adapter->running_cap_crqs);
2096                         ibmvnic_send_crq(adapter, &crq);
2097                 }
2098         } else {
2099                 crq.request_capability.capability =
2100                     cpu_to_be16(PROMISC_REQUESTED);
2101                 crq.request_capability.number = cpu_to_be64(0);
2102                 atomic_inc(&adapter->running_cap_crqs);
2103                 ibmvnic_send_crq(adapter, &crq);
2104         }
2105 }
2106
2107 static int pending_scrq(struct ibmvnic_adapter *adapter,
2108                         struct ibmvnic_sub_crq_queue *scrq)
2109 {
2110         union sub_crq *entry = &scrq->msgs[scrq->cur];
2111
2112         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP ||
2113             adapter->state == VNIC_CLOSING)
2114                 return 1;
2115         else
2116                 return 0;
2117 }
2118
2119 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2120                                         struct ibmvnic_sub_crq_queue *scrq)
2121 {
2122         union sub_crq *entry;
2123         unsigned long flags;
2124
2125         spin_lock_irqsave(&scrq->lock, flags);
2126         entry = &scrq->msgs[scrq->cur];
2127         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2128                 if (++scrq->cur == scrq->size)
2129                         scrq->cur = 0;
2130         } else {
2131                 entry = NULL;
2132         }
2133         spin_unlock_irqrestore(&scrq->lock, flags);
2134
2135         return entry;
2136 }
2137
2138 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2139 {
2140         struct ibmvnic_crq_queue *queue = &adapter->crq;
2141         union ibmvnic_crq *crq;
2142
2143         crq = &queue->msgs[queue->cur];
2144         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2145                 if (++queue->cur == queue->size)
2146                         queue->cur = 0;
2147         } else {
2148                 crq = NULL;
2149         }
2150
2151         return crq;
2152 }
2153
2154 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2155                        union sub_crq *sub_crq)
2156 {
2157         unsigned int ua = adapter->vdev->unit_address;
2158         struct device *dev = &adapter->vdev->dev;
2159         u64 *u64_crq = (u64 *)sub_crq;
2160         int rc;
2161
2162         netdev_dbg(adapter->netdev,
2163                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2164                    (unsigned long int)cpu_to_be64(remote_handle),
2165                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2166                    (unsigned long int)cpu_to_be64(u64_crq[1]),
2167                    (unsigned long int)cpu_to_be64(u64_crq[2]),
2168                    (unsigned long int)cpu_to_be64(u64_crq[3]));
2169
2170         /* Make sure the hypervisor sees the complete request */
2171         mb();
2172
2173         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2174                                 cpu_to_be64(remote_handle),
2175                                 cpu_to_be64(u64_crq[0]),
2176                                 cpu_to_be64(u64_crq[1]),
2177                                 cpu_to_be64(u64_crq[2]),
2178                                 cpu_to_be64(u64_crq[3]));
2179
2180         if (rc) {
2181                 if (rc == H_CLOSED)
2182                         dev_warn(dev, "CRQ Queue closed\n");
2183                 dev_err(dev, "Send error (rc=%d)\n", rc);
2184         }
2185
2186         return rc;
2187 }
2188
2189 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2190                                 u64 remote_handle, u64 ioba, u64 num_entries)
2191 {
2192         unsigned int ua = adapter->vdev->unit_address;
2193         struct device *dev = &adapter->vdev->dev;
2194         int rc;
2195
2196         /* Make sure the hypervisor sees the complete request */
2197         mb();
2198         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2199                                 cpu_to_be64(remote_handle),
2200                                 ioba, num_entries);
2201
2202         if (rc) {
2203                 if (rc == H_CLOSED)
2204                         dev_warn(dev, "CRQ Queue closed\n");
2205                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2206         }
2207
2208         return rc;
2209 }
2210
2211 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2212                             union ibmvnic_crq *crq)
2213 {
2214         unsigned int ua = adapter->vdev->unit_address;
2215         struct device *dev = &adapter->vdev->dev;
2216         u64 *u64_crq = (u64 *)crq;
2217         int rc;
2218
2219         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2220                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2221                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2222
2223         /* Make sure the hypervisor sees the complete request */
2224         mb();
2225
2226         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2227                                 cpu_to_be64(u64_crq[0]),
2228                                 cpu_to_be64(u64_crq[1]));
2229
2230         if (rc) {
2231                 if (rc == H_CLOSED)
2232                         dev_warn(dev, "CRQ Queue closed\n");
2233                 dev_warn(dev, "Send error (rc=%d)\n", rc);
2234         }
2235
2236         return rc;
2237 }
2238
2239 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2240 {
2241         union ibmvnic_crq crq;
2242
2243         memset(&crq, 0, sizeof(crq));
2244         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2245         crq.generic.cmd = IBMVNIC_CRQ_INIT;
2246         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2247
2248         return ibmvnic_send_crq(adapter, &crq);
2249 }
2250
2251 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2252 {
2253         union ibmvnic_crq crq;
2254
2255         memset(&crq, 0, sizeof(crq));
2256         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2257         crq.version_exchange.cmd = VERSION_EXCHANGE;
2258         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2259
2260         return ibmvnic_send_crq(adapter, &crq);
2261 }
2262
2263 static void send_login(struct ibmvnic_adapter *adapter)
2264 {
2265         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
2266         struct ibmvnic_login_buffer *login_buffer;
2267         struct device *dev = &adapter->vdev->dev;
2268         dma_addr_t rsp_buffer_token;
2269         dma_addr_t buffer_token;
2270         size_t rsp_buffer_size;
2271         union ibmvnic_crq crq;
2272         size_t buffer_size;
2273         __be64 *tx_list_p;
2274         __be64 *rx_list_p;
2275         int i;
2276
2277         buffer_size =
2278             sizeof(struct ibmvnic_login_buffer) +
2279             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
2280
2281         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
2282         if (!login_buffer)
2283                 goto buf_alloc_failed;
2284
2285         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
2286                                       DMA_TO_DEVICE);
2287         if (dma_mapping_error(dev, buffer_token)) {
2288                 dev_err(dev, "Couldn't map login buffer\n");
2289                 goto buf_map_failed;
2290         }
2291
2292         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
2293                           sizeof(u64) * adapter->req_tx_queues +
2294                           sizeof(u64) * adapter->req_rx_queues +
2295                           sizeof(u64) * adapter->req_rx_queues +
2296                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
2297
2298         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
2299         if (!login_rsp_buffer)
2300                 goto buf_rsp_alloc_failed;
2301
2302         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
2303                                           rsp_buffer_size, DMA_FROM_DEVICE);
2304         if (dma_mapping_error(dev, rsp_buffer_token)) {
2305                 dev_err(dev, "Couldn't map login rsp buffer\n");
2306                 goto buf_rsp_map_failed;
2307         }
2308
2309         adapter->login_buf = login_buffer;
2310         adapter->login_buf_token = buffer_token;
2311         adapter->login_buf_sz = buffer_size;
2312         adapter->login_rsp_buf = login_rsp_buffer;
2313         adapter->login_rsp_buf_token = rsp_buffer_token;
2314         adapter->login_rsp_buf_sz = rsp_buffer_size;
2315
2316         login_buffer->len = cpu_to_be32(buffer_size);
2317         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2318         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2319         login_buffer->off_txcomp_subcrqs =
2320             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2321         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2322         login_buffer->off_rxcomp_subcrqs =
2323             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2324                         sizeof(u64) * adapter->req_tx_queues);
2325         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2326         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2327
2328         tx_list_p = (__be64 *)((char *)login_buffer +
2329                                       sizeof(struct ibmvnic_login_buffer));
2330         rx_list_p = (__be64 *)((char *)login_buffer +
2331                                       sizeof(struct ibmvnic_login_buffer) +
2332                                       sizeof(u64) * adapter->req_tx_queues);
2333
2334         for (i = 0; i < adapter->req_tx_queues; i++) {
2335                 if (adapter->tx_scrq[i]) {
2336                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2337                                                    crq_num);
2338                 }
2339         }
2340
2341         for (i = 0; i < adapter->req_rx_queues; i++) {
2342                 if (adapter->rx_scrq[i]) {
2343                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2344                                                    crq_num);
2345                 }
2346         }
2347
2348         netdev_dbg(adapter->netdev, "Login Buffer:\n");
2349         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2350                 netdev_dbg(adapter->netdev, "%016lx\n",
2351                            ((unsigned long int *)(adapter->login_buf))[i]);
2352         }
2353
2354         memset(&crq, 0, sizeof(crq));
2355         crq.login.first = IBMVNIC_CRQ_CMD;
2356         crq.login.cmd = LOGIN;
2357         crq.login.ioba = cpu_to_be32(buffer_token);
2358         crq.login.len = cpu_to_be32(buffer_size);
2359         ibmvnic_send_crq(adapter, &crq);
2360
2361         return;
2362
2363 buf_rsp_map_failed:
2364         kfree(login_rsp_buffer);
2365 buf_rsp_alloc_failed:
2366         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2367 buf_map_failed:
2368         kfree(login_buffer);
2369 buf_alloc_failed:
2370         return;
2371 }
2372
2373 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2374                              u32 len, u8 map_id)
2375 {
2376         union ibmvnic_crq crq;
2377
2378         memset(&crq, 0, sizeof(crq));
2379         crq.request_map.first = IBMVNIC_CRQ_CMD;
2380         crq.request_map.cmd = REQUEST_MAP;
2381         crq.request_map.map_id = map_id;
2382         crq.request_map.ioba = cpu_to_be32(addr);
2383         crq.request_map.len = cpu_to_be32(len);
2384         ibmvnic_send_crq(adapter, &crq);
2385 }
2386
2387 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2388 {
2389         union ibmvnic_crq crq;
2390
2391         memset(&crq, 0, sizeof(crq));
2392         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2393         crq.request_unmap.cmd = REQUEST_UNMAP;
2394         crq.request_unmap.map_id = map_id;
2395         ibmvnic_send_crq(adapter, &crq);
2396 }
2397
2398 static void send_map_query(struct ibmvnic_adapter *adapter)
2399 {
2400         union ibmvnic_crq crq;
2401
2402         memset(&crq, 0, sizeof(crq));
2403         crq.query_map.first = IBMVNIC_CRQ_CMD;
2404         crq.query_map.cmd = QUERY_MAP;
2405         ibmvnic_send_crq(adapter, &crq);
2406 }
2407
2408 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2409 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2410 {
2411         union ibmvnic_crq crq;
2412
2413         atomic_set(&adapter->running_cap_crqs, 0);
2414         memset(&crq, 0, sizeof(crq));
2415         crq.query_capability.first = IBMVNIC_CRQ_CMD;
2416         crq.query_capability.cmd = QUERY_CAPABILITY;
2417
2418         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2419         atomic_inc(&adapter->running_cap_crqs);
2420         ibmvnic_send_crq(adapter, &crq);
2421
2422         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2423         atomic_inc(&adapter->running_cap_crqs);
2424         ibmvnic_send_crq(adapter, &crq);
2425
2426         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2427         atomic_inc(&adapter->running_cap_crqs);
2428         ibmvnic_send_crq(adapter, &crq);
2429
2430         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2431         atomic_inc(&adapter->running_cap_crqs);
2432         ibmvnic_send_crq(adapter, &crq);
2433
2434         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2435         atomic_inc(&adapter->running_cap_crqs);
2436         ibmvnic_send_crq(adapter, &crq);
2437
2438         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2439         atomic_inc(&adapter->running_cap_crqs);
2440         ibmvnic_send_crq(adapter, &crq);
2441
2442         crq.query_capability.capability =
2443             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2444         atomic_inc(&adapter->running_cap_crqs);
2445         ibmvnic_send_crq(adapter, &crq);
2446
2447         crq.query_capability.capability =
2448             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2449         atomic_inc(&adapter->running_cap_crqs);
2450         ibmvnic_send_crq(adapter, &crq);
2451
2452         crq.query_capability.capability =
2453             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2454         atomic_inc(&adapter->running_cap_crqs);
2455         ibmvnic_send_crq(adapter, &crq);
2456
2457         crq.query_capability.capability =
2458             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2459         atomic_inc(&adapter->running_cap_crqs);
2460         ibmvnic_send_crq(adapter, &crq);
2461
2462         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2463         atomic_inc(&adapter->running_cap_crqs);
2464         ibmvnic_send_crq(adapter, &crq);
2465
2466         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2467         atomic_inc(&adapter->running_cap_crqs);
2468         ibmvnic_send_crq(adapter, &crq);
2469
2470         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2471         atomic_inc(&adapter->running_cap_crqs);
2472         ibmvnic_send_crq(adapter, &crq);
2473
2474         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2475         atomic_inc(&adapter->running_cap_crqs);
2476         ibmvnic_send_crq(adapter, &crq);
2477
2478         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2479         atomic_inc(&adapter->running_cap_crqs);
2480         ibmvnic_send_crq(adapter, &crq);
2481
2482         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2483         atomic_inc(&adapter->running_cap_crqs);
2484         ibmvnic_send_crq(adapter, &crq);
2485
2486         crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
2487         atomic_inc(&adapter->running_cap_crqs);
2488         ibmvnic_send_crq(adapter, &crq);
2489
2490         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2491         atomic_inc(&adapter->running_cap_crqs);
2492         ibmvnic_send_crq(adapter, &crq);
2493
2494         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2495         atomic_inc(&adapter->running_cap_crqs);
2496         ibmvnic_send_crq(adapter, &crq);
2497
2498         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2499         atomic_inc(&adapter->running_cap_crqs);
2500         ibmvnic_send_crq(adapter, &crq);
2501
2502         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2503         atomic_inc(&adapter->running_cap_crqs);
2504         ibmvnic_send_crq(adapter, &crq);
2505
2506         crq.query_capability.capability =
2507                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2508         atomic_inc(&adapter->running_cap_crqs);
2509         ibmvnic_send_crq(adapter, &crq);
2510
2511         crq.query_capability.capability =
2512                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2513         atomic_inc(&adapter->running_cap_crqs);
2514         ibmvnic_send_crq(adapter, &crq);
2515
2516         crq.query_capability.capability =
2517                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2518         atomic_inc(&adapter->running_cap_crqs);
2519         ibmvnic_send_crq(adapter, &crq);
2520
2521         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2522         atomic_inc(&adapter->running_cap_crqs);
2523         ibmvnic_send_crq(adapter, &crq);
2524 }
2525
2526 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2527 {
2528         struct device *dev = &adapter->vdev->dev;
2529         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2530         union ibmvnic_crq crq;
2531         int i;
2532
2533         dma_unmap_single(dev, adapter->ip_offload_tok,
2534                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2535
2536         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2537         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2538                 netdev_dbg(adapter->netdev, "%016lx\n",
2539                            ((unsigned long int *)(buf))[i]);
2540
2541         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2542         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2543         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2544                    buf->tcp_ipv4_chksum);
2545         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2546                    buf->tcp_ipv6_chksum);
2547         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2548                    buf->udp_ipv4_chksum);
2549         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2550                    buf->udp_ipv6_chksum);
2551         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2552                    buf->large_tx_ipv4);
2553         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2554                    buf->large_tx_ipv6);
2555         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2556                    buf->large_rx_ipv4);
2557         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2558                    buf->large_rx_ipv6);
2559         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2560                    buf->max_ipv4_header_size);
2561         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2562                    buf->max_ipv6_header_size);
2563         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2564                    buf->max_tcp_header_size);
2565         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2566                    buf->max_udp_header_size);
2567         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2568                    buf->max_large_tx_size);
2569         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2570                    buf->max_large_rx_size);
2571         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2572                    buf->ipv6_extension_header);
2573         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2574                    buf->tcp_pseudosum_req);
2575         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2576                    buf->num_ipv6_ext_headers);
2577         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2578                    buf->off_ipv6_ext_headers);
2579
2580         adapter->ip_offload_ctrl_tok =
2581             dma_map_single(dev, &adapter->ip_offload_ctrl,
2582                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2583
2584         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2585                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2586                 return;
2587         }
2588
2589         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2590         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2591         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2592         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2593         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2594
2595         /* large_tx/rx disabled for now, additional features needed */
2596         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2597         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2598         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2599         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2600
2601         adapter->netdev->features = NETIF_F_GSO;
2602
2603         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2604                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2605
2606         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2607                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2608
2609         if ((adapter->netdev->features &
2610             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2611                 adapter->netdev->features |= NETIF_F_RXCSUM;
2612
2613         memset(&crq, 0, sizeof(crq));
2614         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2615         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2616         crq.control_ip_offload.len =
2617             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2618         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2619         ibmvnic_send_crq(adapter, &crq);
2620 }
2621
2622 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2623                                   struct ibmvnic_adapter *adapter)
2624 {
2625         struct device *dev = &adapter->vdev->dev;
2626         struct ibmvnic_error_buff *error_buff, *tmp;
2627         unsigned long flags;
2628         bool found = false;
2629         int i;
2630
2631         if (!crq->request_error_rsp.rc.code) {
2632                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2633                          crq->request_error_rsp.rc.code);
2634                 return;
2635         }
2636
2637         spin_lock_irqsave(&adapter->error_list_lock, flags);
2638         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2639                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2640                         found = true;
2641                         list_del(&error_buff->list);
2642                         break;
2643                 }
2644         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2645
2646         if (!found) {
2647                 dev_err(dev, "Couldn't find error id %x\n",
2648                         be32_to_cpu(crq->request_error_rsp.error_id));
2649                 return;
2650         }
2651
2652         dev_err(dev, "Detailed info for error id %x:",
2653                 be32_to_cpu(crq->request_error_rsp.error_id));
2654
2655         for (i = 0; i < error_buff->len; i++) {
2656                 pr_cont("%02x", (int)error_buff->buff[i]);
2657                 if (i % 8 == 7)
2658                         pr_cont(" ");
2659         }
2660         pr_cont("\n");
2661
2662         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2663                          DMA_FROM_DEVICE);
2664         kfree(error_buff->buff);
2665         kfree(error_buff);
2666 }
2667
2668 static void request_error_information(struct ibmvnic_adapter *adapter,
2669                                       union ibmvnic_crq *err_crq)
2670 {
2671         struct device *dev = &adapter->vdev->dev;
2672         struct net_device *netdev = adapter->netdev;
2673         struct ibmvnic_error_buff *error_buff;
2674         unsigned long timeout = msecs_to_jiffies(30000);
2675         union ibmvnic_crq crq;
2676         unsigned long flags;
2677         int rc, detail_len;
2678
2679         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2680         if (!error_buff)
2681                 return;
2682
2683         detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
2684         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2685         if (!error_buff->buff) {
2686                 kfree(error_buff);
2687                 return;
2688         }
2689
2690         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2691                                          DMA_FROM_DEVICE);
2692         if (dma_mapping_error(dev, error_buff->dma)) {
2693                 netdev_err(netdev, "Couldn't map error buffer\n");
2694                 kfree(error_buff->buff);
2695                 kfree(error_buff);
2696                 return;
2697         }
2698
2699         error_buff->len = detail_len;
2700         error_buff->error_id = err_crq->error_indication.error_id;
2701
2702         spin_lock_irqsave(&adapter->error_list_lock, flags);
2703         list_add_tail(&error_buff->list, &adapter->errors);
2704         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2705
2706         memset(&crq, 0, sizeof(crq));
2707         crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2708         crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2709         crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2710         crq.request_error_info.len = cpu_to_be32(detail_len);
2711         crq.request_error_info.error_id = err_crq->error_indication.error_id;
2712
2713         rc = ibmvnic_send_crq(adapter, &crq);
2714         if (rc) {
2715                 netdev_err(netdev, "failed to request error information\n");
2716                 goto err_info_fail;
2717         }
2718
2719         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
2720                 netdev_err(netdev, "timeout waiting for error information\n");
2721                 goto err_info_fail;
2722         }
2723
2724         return;
2725
2726 err_info_fail:
2727         spin_lock_irqsave(&adapter->error_list_lock, flags);
2728         list_del(&error_buff->list);
2729         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2730
2731         kfree(error_buff->buff);
2732         kfree(error_buff);
2733 }
2734
2735 static void handle_error_indication(union ibmvnic_crq *crq,
2736                                     struct ibmvnic_adapter *adapter)
2737 {
2738         struct device *dev = &adapter->vdev->dev;
2739
2740         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2741                 crq->error_indication.flags
2742                         & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2743                 be32_to_cpu(crq->error_indication.error_id),
2744                 be16_to_cpu(crq->error_indication.error_cause));
2745
2746         if (be32_to_cpu(crq->error_indication.error_id))
2747                 request_error_information(adapter, crq);
2748
2749         if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
2750                 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2751 }
2752
2753 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2754                                   struct ibmvnic_adapter *adapter)
2755 {
2756         struct net_device *netdev = adapter->netdev;
2757         struct device *dev = &adapter->vdev->dev;
2758         long rc;
2759
2760         rc = crq->change_mac_addr_rsp.rc.code;
2761         if (rc) {
2762                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2763                 return;
2764         }
2765         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2766                ETH_ALEN);
2767 }
2768
2769 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2770                                    struct ibmvnic_adapter *adapter)
2771 {
2772         struct device *dev = &adapter->vdev->dev;
2773         u64 *req_value;
2774         char *name;
2775
2776         atomic_dec(&adapter->running_cap_crqs);
2777         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2778         case REQ_TX_QUEUES:
2779                 req_value = &adapter->req_tx_queues;
2780                 name = "tx";
2781                 break;
2782         case REQ_RX_QUEUES:
2783                 req_value = &adapter->req_rx_queues;
2784                 name = "rx";
2785                 break;
2786         case REQ_RX_ADD_QUEUES:
2787                 req_value = &adapter->req_rx_add_queues;
2788                 name = "rx_add";
2789                 break;
2790         case REQ_TX_ENTRIES_PER_SUBCRQ:
2791                 req_value = &adapter->req_tx_entries_per_subcrq;
2792                 name = "tx_entries_per_subcrq";
2793                 break;
2794         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2795                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2796                 name = "rx_add_entries_per_subcrq";
2797                 break;
2798         case REQ_MTU:
2799                 req_value = &adapter->req_mtu;
2800                 name = "mtu";
2801                 break;
2802         case PROMISC_REQUESTED:
2803                 req_value = &adapter->promisc;
2804                 name = "promisc";
2805                 break;
2806         default:
2807                 dev_err(dev, "Got invalid cap request rsp %d\n",
2808                         crq->request_capability.capability);
2809                 return;
2810         }
2811
2812         switch (crq->request_capability_rsp.rc.code) {
2813         case SUCCESS:
2814                 break;
2815         case PARTIALSUCCESS:
2816                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2817                          *req_value,
2818                          (long int)be64_to_cpu(crq->request_capability_rsp.
2819                                                number), name);
2820                 release_sub_crqs(adapter);
2821                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2822                 ibmvnic_send_req_caps(adapter, 1);
2823                 return;
2824         default:
2825                 dev_err(dev, "Error %d in request cap rsp\n",
2826                         crq->request_capability_rsp.rc.code);
2827                 return;
2828         }
2829
2830         /* Done receiving requested capabilities, query IP offload support */
2831         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2832                 union ibmvnic_crq newcrq;
2833                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2834                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2835                     &adapter->ip_offload_buf;
2836
2837                 adapter->wait_capability = false;
2838                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2839                                                          buf_sz,
2840                                                          DMA_FROM_DEVICE);
2841
2842                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2843                         if (!firmware_has_feature(FW_FEATURE_CMO))
2844                                 dev_err(dev, "Couldn't map offload buffer\n");
2845                         return;
2846                 }
2847
2848                 memset(&newcrq, 0, sizeof(newcrq));
2849                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2850                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2851                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2852                 newcrq.query_ip_offload.ioba =
2853                     cpu_to_be32(adapter->ip_offload_tok);
2854
2855                 ibmvnic_send_crq(adapter, &newcrq);
2856         }
2857 }
2858
2859 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2860                             struct ibmvnic_adapter *adapter)
2861 {
2862         struct device *dev = &adapter->vdev->dev;
2863         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2864         struct ibmvnic_login_buffer *login = adapter->login_buf;
2865         int i;
2866
2867         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2868                          DMA_BIDIRECTIONAL);
2869         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2870                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2871
2872         /* If the number of queues requested can't be allocated by the
2873          * server, the login response will return with code 1. We will need
2874          * to resend the login buffer with fewer queues requested.
2875          */
2876         if (login_rsp_crq->generic.rc.code) {
2877                 adapter->renegotiate = true;
2878                 complete(&adapter->init_done);
2879                 return 0;
2880         }
2881
2882         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2883         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2884                 netdev_dbg(adapter->netdev, "%016lx\n",
2885                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2886         }
2887
2888         /* Sanity checks */
2889         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2890             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2891              adapter->req_rx_add_queues !=
2892              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2893                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2894                 ibmvnic_remove(adapter->vdev);
2895                 return -EIO;
2896         }
2897         complete(&adapter->init_done);
2898
2899         return 0;
2900 }
2901
2902 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2903                                    struct ibmvnic_adapter *adapter)
2904 {
2905         struct device *dev = &adapter->vdev->dev;
2906         u8 map_id = crq->request_map_rsp.map_id;
2907         int tx_subcrqs;
2908         int rx_subcrqs;
2909         long rc;
2910         int i;
2911
2912         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2913         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2914
2915         rc = crq->request_map_rsp.rc.code;
2916         if (rc) {
2917                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2918                 adapter->map_id--;
2919                 /* need to find and zero tx/rx_pool map_id */
2920                 for (i = 0; i < tx_subcrqs; i++) {
2921                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2922                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2923                 }
2924                 for (i = 0; i < rx_subcrqs; i++) {
2925                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2926                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2927                 }
2928         }
2929         complete(&adapter->fw_done);
2930 }
2931
2932 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2933                                      struct ibmvnic_adapter *adapter)
2934 {
2935         struct device *dev = &adapter->vdev->dev;
2936         long rc;
2937
2938         rc = crq->request_unmap_rsp.rc.code;
2939         if (rc)
2940                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2941 }
2942
2943 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2944                                  struct ibmvnic_adapter *adapter)
2945 {
2946         struct net_device *netdev = adapter->netdev;
2947         struct device *dev = &adapter->vdev->dev;
2948         long rc;
2949
2950         rc = crq->query_map_rsp.rc.code;
2951         if (rc) {
2952                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2953                 return;
2954         }
2955         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2956                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2957                    crq->query_map_rsp.free_pages);
2958 }
2959
2960 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2961                                  struct ibmvnic_adapter *adapter)
2962 {
2963         struct net_device *netdev = adapter->netdev;
2964         struct device *dev = &adapter->vdev->dev;
2965         long rc;
2966
2967         atomic_dec(&adapter->running_cap_crqs);
2968         netdev_dbg(netdev, "Outstanding queries: %d\n",
2969                    atomic_read(&adapter->running_cap_crqs));
2970         rc = crq->query_capability.rc.code;
2971         if (rc) {
2972                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2973                 goto out;
2974         }
2975
2976         switch (be16_to_cpu(crq->query_capability.capability)) {
2977         case MIN_TX_QUEUES:
2978                 adapter->min_tx_queues =
2979                     be64_to_cpu(crq->query_capability.number);
2980                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2981                            adapter->min_tx_queues);
2982                 break;
2983         case MIN_RX_QUEUES:
2984                 adapter->min_rx_queues =
2985                     be64_to_cpu(crq->query_capability.number);
2986                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2987                            adapter->min_rx_queues);
2988                 break;
2989         case MIN_RX_ADD_QUEUES:
2990                 adapter->min_rx_add_queues =
2991                     be64_to_cpu(crq->query_capability.number);
2992                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2993                            adapter->min_rx_add_queues);
2994                 break;
2995         case MAX_TX_QUEUES:
2996                 adapter->max_tx_queues =
2997                     be64_to_cpu(crq->query_capability.number);
2998                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2999                            adapter->max_tx_queues);
3000                 break;
3001         case MAX_RX_QUEUES:
3002                 adapter->max_rx_queues =
3003                     be64_to_cpu(crq->query_capability.number);
3004                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3005                            adapter->max_rx_queues);
3006                 break;
3007         case MAX_RX_ADD_QUEUES:
3008                 adapter->max_rx_add_queues =
3009                     be64_to_cpu(crq->query_capability.number);
3010                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3011                            adapter->max_rx_add_queues);
3012                 break;
3013         case MIN_TX_ENTRIES_PER_SUBCRQ:
3014                 adapter->min_tx_entries_per_subcrq =
3015                     be64_to_cpu(crq->query_capability.number);
3016                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3017                            adapter->min_tx_entries_per_subcrq);
3018                 break;
3019         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3020                 adapter->min_rx_add_entries_per_subcrq =
3021                     be64_to_cpu(crq->query_capability.number);
3022                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3023                            adapter->min_rx_add_entries_per_subcrq);
3024                 break;
3025         case MAX_TX_ENTRIES_PER_SUBCRQ:
3026                 adapter->max_tx_entries_per_subcrq =
3027                     be64_to_cpu(crq->query_capability.number);
3028                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3029                            adapter->max_tx_entries_per_subcrq);
3030                 break;
3031         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3032                 adapter->max_rx_add_entries_per_subcrq =
3033                     be64_to_cpu(crq->query_capability.number);
3034                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3035                            adapter->max_rx_add_entries_per_subcrq);
3036                 break;
3037         case TCP_IP_OFFLOAD:
3038                 adapter->tcp_ip_offload =
3039                     be64_to_cpu(crq->query_capability.number);
3040                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3041                            adapter->tcp_ip_offload);
3042                 break;
3043         case PROMISC_SUPPORTED:
3044                 adapter->promisc_supported =
3045                     be64_to_cpu(crq->query_capability.number);
3046                 netdev_dbg(netdev, "promisc_supported = %lld\n",
3047                            adapter->promisc_supported);
3048                 break;
3049         case MIN_MTU:
3050                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3051                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3052                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3053                 break;
3054         case MAX_MTU:
3055                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3056                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3057                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3058                 break;
3059         case MAX_MULTICAST_FILTERS:
3060                 adapter->max_multicast_filters =
3061                     be64_to_cpu(crq->query_capability.number);
3062                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3063                            adapter->max_multicast_filters);
3064                 break;
3065         case VLAN_HEADER_INSERTION:
3066                 adapter->vlan_header_insertion =
3067                     be64_to_cpu(crq->query_capability.number);
3068                 if (adapter->vlan_header_insertion)
3069                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3070                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3071                            adapter->vlan_header_insertion);
3072                 break;
3073         case RX_VLAN_HEADER_INSERTION:
3074                 adapter->rx_vlan_header_insertion =
3075                     be64_to_cpu(crq->query_capability.number);
3076                 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3077                            adapter->rx_vlan_header_insertion);
3078                 break;
3079         case MAX_TX_SG_ENTRIES:
3080                 adapter->max_tx_sg_entries =
3081                     be64_to_cpu(crq->query_capability.number);
3082                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3083                            adapter->max_tx_sg_entries);
3084                 break;
3085         case RX_SG_SUPPORTED:
3086                 adapter->rx_sg_supported =
3087                     be64_to_cpu(crq->query_capability.number);
3088                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3089                            adapter->rx_sg_supported);
3090                 break;
3091         case OPT_TX_COMP_SUB_QUEUES:
3092                 adapter->opt_tx_comp_sub_queues =
3093                     be64_to_cpu(crq->query_capability.number);
3094                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3095                            adapter->opt_tx_comp_sub_queues);
3096                 break;
3097         case OPT_RX_COMP_QUEUES:
3098                 adapter->opt_rx_comp_queues =
3099                     be64_to_cpu(crq->query_capability.number);
3100                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3101                            adapter->opt_rx_comp_queues);
3102                 break;
3103         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3104                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3105                     be64_to_cpu(crq->query_capability.number);
3106                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3107                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
3108                 break;
3109         case OPT_TX_ENTRIES_PER_SUBCRQ:
3110                 adapter->opt_tx_entries_per_subcrq =
3111                     be64_to_cpu(crq->query_capability.number);
3112                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3113                            adapter->opt_tx_entries_per_subcrq);
3114                 break;
3115         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3116                 adapter->opt_rxba_entries_per_subcrq =
3117                     be64_to_cpu(crq->query_capability.number);
3118                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3119                            adapter->opt_rxba_entries_per_subcrq);
3120                 break;
3121         case TX_RX_DESC_REQ:
3122                 adapter->tx_rx_desc_req = crq->query_capability.number;
3123                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3124                            adapter->tx_rx_desc_req);
3125                 break;
3126
3127         default:
3128                 netdev_err(netdev, "Got invalid cap rsp %d\n",
3129                            crq->query_capability.capability);
3130         }
3131
3132 out:
3133         if (atomic_read(&adapter->running_cap_crqs) == 0) {
3134                 adapter->wait_capability = false;
3135                 ibmvnic_send_req_caps(adapter, 0);
3136         }
3137 }
3138
3139 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3140                                struct ibmvnic_adapter *adapter)
3141 {
3142         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3143         struct net_device *netdev = adapter->netdev;
3144         struct device *dev = &adapter->vdev->dev;
3145         u64 *u64_crq = (u64 *)crq;
3146         long rc;
3147
3148         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3149                    (unsigned long int)cpu_to_be64(u64_crq[0]),
3150                    (unsigned long int)cpu_to_be64(u64_crq[1]));
3151         switch (gen_crq->first) {
3152         case IBMVNIC_CRQ_INIT_RSP:
3153                 switch (gen_crq->cmd) {
3154                 case IBMVNIC_CRQ_INIT:
3155                         dev_info(dev, "Partner initialized\n");
3156                         break;
3157                 case IBMVNIC_CRQ_INIT_COMPLETE:
3158                         dev_info(dev, "Partner initialization complete\n");
3159                         send_version_xchg(adapter);
3160                         break;
3161                 default:
3162                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3163                 }
3164                 return;
3165         case IBMVNIC_CRQ_XPORT_EVENT:
3166                 netif_carrier_off(netdev);
3167                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3168                         dev_info(dev, "Migrated, re-enabling adapter\n");
3169                         ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3170                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3171                         dev_info(dev, "Backing device failover detected\n");
3172                         ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3173                 } else {
3174                         /* The adapter lost the connection */
3175                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3176                                 gen_crq->cmd);
3177                         ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3178                 }
3179                 return;
3180         case IBMVNIC_CRQ_CMD_RSP:
3181                 break;
3182         default:
3183                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3184                         gen_crq->first);
3185                 return;
3186         }
3187
3188         switch (gen_crq->cmd) {
3189         case VERSION_EXCHANGE_RSP:
3190                 rc = crq->version_exchange_rsp.rc.code;
3191                 if (rc) {
3192                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3193                         break;
3194                 }
3195                 dev_info(dev, "Partner protocol version is %d\n",
3196                          crq->version_exchange_rsp.version);
3197                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3198                     ibmvnic_version)
3199                         ibmvnic_version =
3200                             be16_to_cpu(crq->version_exchange_rsp.version);
3201                 send_cap_queries(adapter);
3202                 break;
3203         case QUERY_CAPABILITY_RSP:
3204                 handle_query_cap_rsp(crq, adapter);
3205                 break;
3206         case QUERY_MAP_RSP:
3207                 handle_query_map_rsp(crq, adapter);
3208                 break;
3209         case REQUEST_MAP_RSP:
3210                 handle_request_map_rsp(crq, adapter);
3211                 break;
3212         case REQUEST_UNMAP_RSP:
3213                 handle_request_unmap_rsp(crq, adapter);
3214                 break;
3215         case REQUEST_CAPABILITY_RSP:
3216                 handle_request_cap_rsp(crq, adapter);
3217                 break;
3218         case LOGIN_RSP:
3219                 netdev_dbg(netdev, "Got Login Response\n");
3220                 handle_login_rsp(crq, adapter);
3221                 break;
3222         case LOGICAL_LINK_STATE_RSP:
3223                 netdev_dbg(netdev,
3224                            "Got Logical Link State Response, state: %d rc: %d\n",
3225                            crq->logical_link_state_rsp.link_state,
3226                            crq->logical_link_state_rsp.rc.code);
3227                 adapter->logical_link_state =
3228                     crq->logical_link_state_rsp.link_state;
3229                 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
3230                 complete(&adapter->init_done);
3231                 break;
3232         case LINK_STATE_INDICATION:
3233                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3234                 adapter->phys_link_state =
3235                     crq->link_state_indication.phys_link_state;
3236                 adapter->logical_link_state =
3237                     crq->link_state_indication.logical_link_state;
3238                 break;
3239         case CHANGE_MAC_ADDR_RSP:
3240                 netdev_dbg(netdev, "Got MAC address change Response\n");
3241                 handle_change_mac_rsp(crq, adapter);
3242                 break;
3243         case ERROR_INDICATION:
3244                 netdev_dbg(netdev, "Got Error Indication\n");
3245                 handle_error_indication(crq, adapter);
3246                 break;
3247         case REQUEST_ERROR_RSP:
3248                 netdev_dbg(netdev, "Got Error Detail Response\n");
3249                 handle_error_info_rsp(crq, adapter);
3250                 break;
3251         case REQUEST_STATISTICS_RSP:
3252                 netdev_dbg(netdev, "Got Statistics Response\n");
3253                 complete(&adapter->stats_done);
3254                 break;
3255         case QUERY_IP_OFFLOAD_RSP:
3256                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3257                 handle_query_ip_offload_rsp(adapter);
3258                 break;
3259         case MULTICAST_CTRL_RSP:
3260                 netdev_dbg(netdev, "Got multicast control Response\n");
3261                 break;
3262         case CONTROL_IP_OFFLOAD_RSP:
3263                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3264                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3265                                  sizeof(adapter->ip_offload_ctrl),
3266                                  DMA_TO_DEVICE);
3267                 complete(&adapter->init_done);
3268                 break;
3269         case COLLECT_FW_TRACE_RSP:
3270                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3271                 complete(&adapter->fw_done);
3272                 break;
3273         default:
3274                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3275                            gen_crq->cmd);
3276         }
3277 }
3278
3279 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3280 {
3281         struct ibmvnic_adapter *adapter = instance;
3282
3283         tasklet_schedule(&adapter->tasklet);
3284         return IRQ_HANDLED;
3285 }
3286
3287 static void ibmvnic_tasklet(void *data)
3288 {
3289         struct ibmvnic_adapter *adapter = data;
3290         struct ibmvnic_crq_queue *queue = &adapter->crq;
3291         union ibmvnic_crq *crq;
3292         unsigned long flags;
3293         bool done = false;
3294
3295         spin_lock_irqsave(&queue->lock, flags);
3296         while (!done) {
3297                 /* Pull all the valid messages off the CRQ */
3298                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3299                         ibmvnic_handle_crq(crq, adapter);
3300                         crq->generic.first = 0;
3301                 }
3302
3303                 /* remain in tasklet until all
3304                  * capabilities responses are received
3305                  */
3306                 if (!adapter->wait_capability)
3307                         done = true;
3308         }
3309         /* if capabilities CRQ's were sent in this tasklet, the following
3310          * tasklet must wait until all responses are received
3311          */
3312         if (atomic_read(&adapter->running_cap_crqs) != 0)
3313                 adapter->wait_capability = true;
3314         spin_unlock_irqrestore(&queue->lock, flags);
3315 }
3316
3317 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3318 {
3319         struct vio_dev *vdev = adapter->vdev;
3320         int rc;
3321
3322         do {
3323                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3324         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3325
3326         if (rc)
3327                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3328
3329         return rc;
3330 }
3331
3332 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3333 {
3334         struct ibmvnic_crq_queue *crq = &adapter->crq;
3335         struct device *dev = &adapter->vdev->dev;
3336         struct vio_dev *vdev = adapter->vdev;
3337         int rc;
3338
3339         /* Close the CRQ */
3340         do {
3341                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3342         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3343
3344         /* Clean out the queue */
3345         memset(crq->msgs, 0, PAGE_SIZE);
3346         crq->cur = 0;
3347
3348         /* And re-open it again */
3349         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3350                                 crq->msg_token, PAGE_SIZE);
3351
3352         if (rc == H_CLOSED)
3353                 /* Adapter is good, but other end is not ready */
3354                 dev_warn(dev, "Partner adapter not ready\n");
3355         else if (rc != 0)
3356                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3357
3358         return rc;
3359 }
3360
3361 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3362 {
3363         struct ibmvnic_crq_queue *crq = &adapter->crq;
3364         struct vio_dev *vdev = adapter->vdev;
3365         long rc;
3366
3367         if (!crq->msgs)
3368                 return;
3369
3370         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3371         free_irq(vdev->irq, adapter);
3372         tasklet_kill(&adapter->tasklet);
3373         do {
3374                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3375         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3376
3377         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3378                          DMA_BIDIRECTIONAL);
3379         free_page((unsigned long)crq->msgs);
3380         crq->msgs = NULL;
3381 }
3382
3383 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3384 {
3385         struct ibmvnic_crq_queue *crq = &adapter->crq;
3386         struct device *dev = &adapter->vdev->dev;
3387         struct vio_dev *vdev = adapter->vdev;
3388         int rc, retrc = -ENOMEM;
3389
3390         if (crq->msgs)
3391                 return 0;
3392
3393         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3394         /* Should we allocate more than one page? */
3395
3396         if (!crq->msgs)
3397                 return -ENOMEM;
3398
3399         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3400         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3401                                         DMA_BIDIRECTIONAL);
3402         if (dma_mapping_error(dev, crq->msg_token))
3403                 goto map_failed;
3404
3405         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3406                                 crq->msg_token, PAGE_SIZE);
3407
3408         if (rc == H_RESOURCE)
3409                 /* maybe kexecing and resource is busy. try a reset */
3410                 rc = ibmvnic_reset_crq(adapter);
3411         retrc = rc;
3412
3413         if (rc == H_CLOSED) {
3414                 dev_warn(dev, "Partner adapter not ready\n");
3415         } else if (rc) {
3416                 dev_warn(dev, "Error %d opening adapter\n", rc);
3417                 goto reg_crq_failed;
3418         }
3419
3420         retrc = 0;
3421
3422         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3423                      (unsigned long)adapter);
3424
3425         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3426         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3427                          adapter);
3428         if (rc) {
3429                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3430                         vdev->irq, rc);
3431                 goto req_irq_failed;
3432         }
3433
3434         rc = vio_enable_interrupts(vdev);
3435         if (rc) {
3436                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3437                 goto req_irq_failed;
3438         }
3439
3440         crq->cur = 0;
3441         spin_lock_init(&crq->lock);
3442
3443         return retrc;
3444
3445 req_irq_failed:
3446         tasklet_kill(&adapter->tasklet);
3447         do {
3448                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3449         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3450 reg_crq_failed:
3451         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3452 map_failed:
3453         free_page((unsigned long)crq->msgs);
3454         crq->msgs = NULL;
3455         return retrc;
3456 }
3457
3458 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3459 {
3460         struct device *dev = &adapter->vdev->dev;
3461         unsigned long timeout = msecs_to_jiffies(30000);
3462         int rc;
3463
3464         rc = init_crq_queue(adapter);
3465         if (rc) {
3466                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3467                 return rc;
3468         }
3469
3470         init_completion(&adapter->init_done);
3471         ibmvnic_send_crq_init(adapter);
3472         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3473                 dev_err(dev, "Initialization sequence timed out\n");
3474                 release_crq_queue(adapter);
3475                 return -1;
3476         }
3477
3478         rc = init_sub_crqs(adapter);
3479         if (rc) {
3480                 dev_err(dev, "Initialization of sub crqs failed\n");
3481                 release_crq_queue(adapter);
3482         }
3483
3484         return rc;
3485 }
3486
3487 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3488 {
3489         struct ibmvnic_adapter *adapter;
3490         struct net_device *netdev;
3491         unsigned char *mac_addr_p;
3492         int rc;
3493
3494         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3495                 dev->unit_address);
3496
3497         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3498                                                         VETH_MAC_ADDR, NULL);
3499         if (!mac_addr_p) {
3500                 dev_err(&dev->dev,
3501                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3502                         __FILE__, __LINE__);
3503                 return 0;
3504         }
3505
3506         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3507                                    IBMVNIC_MAX_TX_QUEUES);
3508         if (!netdev)
3509                 return -ENOMEM;
3510
3511         adapter = netdev_priv(netdev);
3512         adapter->state = VNIC_PROBING;
3513         dev_set_drvdata(&dev->dev, netdev);
3514         adapter->vdev = dev;
3515         adapter->netdev = netdev;
3516
3517         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3518         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3519         netdev->irq = dev->irq;
3520         netdev->netdev_ops = &ibmvnic_netdev_ops;
3521         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3522         SET_NETDEV_DEV(netdev, &dev->dev);
3523
3524         spin_lock_init(&adapter->stats_lock);
3525
3526         INIT_LIST_HEAD(&adapter->errors);
3527         spin_lock_init(&adapter->error_list_lock);
3528
3529         INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
3530         INIT_LIST_HEAD(&adapter->rwi_list);
3531         mutex_init(&adapter->reset_lock);
3532         mutex_init(&adapter->rwi_lock);
3533         adapter->resetting = false;
3534
3535         rc = ibmvnic_init(adapter);
3536         if (rc) {
3537                 free_netdev(netdev);
3538                 return rc;
3539         }
3540
3541         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3542
3543         rc = register_netdev(netdev);
3544         if (rc) {
3545                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3546                 free_netdev(netdev);
3547                 return rc;
3548         }
3549         dev_info(&dev->dev, "ibmvnic registered\n");
3550
3551         adapter->state = VNIC_PROBED;
3552         return 0;
3553 }
3554
3555 static int ibmvnic_remove(struct vio_dev *dev)
3556 {
3557         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3558         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3559
3560         adapter->state = VNIC_REMOVING;
3561         unregister_netdev(netdev);
3562         mutex_lock(&adapter->reset_lock);
3563
3564         release_resources(adapter);
3565         release_sub_crqs(adapter);
3566         release_crq_queue(adapter);
3567
3568         adapter->state = VNIC_REMOVED;
3569
3570         mutex_unlock(&adapter->reset_lock);
3571         free_netdev(netdev);
3572         dev_set_drvdata(&dev->dev, NULL);
3573
3574         return 0;
3575 }
3576
3577 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3578 {
3579         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3580         struct ibmvnic_adapter *adapter;
3581         struct iommu_table *tbl;
3582         unsigned long ret = 0;
3583         int i;
3584
3585         tbl = get_iommu_table_base(&vdev->dev);
3586
3587         /* netdev inits at probe time along with the structures we need below*/
3588         if (!netdev)
3589                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3590
3591         adapter = netdev_priv(netdev);
3592
3593         ret += PAGE_SIZE; /* the crq message queue */
3594         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3595
3596         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3597                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3598
3599         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3600              i++)
3601                 ret += adapter->rx_pool[i].size *
3602                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3603
3604         return ret;
3605 }
3606
3607 static int ibmvnic_resume(struct device *dev)
3608 {
3609         struct net_device *netdev = dev_get_drvdata(dev);
3610         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3611         int i;
3612
3613         /* kick the interrupt handlers just in case we lost an interrupt */
3614         for (i = 0; i < adapter->req_rx_queues; i++)
3615                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3616                                      adapter->rx_scrq[i]);
3617
3618         return 0;
3619 }
3620
3621 static struct vio_device_id ibmvnic_device_table[] = {
3622         {"network", "IBM,vnic"},
3623         {"", "" }
3624 };
3625 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3626
3627 static const struct dev_pm_ops ibmvnic_pm_ops = {
3628         .resume = ibmvnic_resume
3629 };
3630
3631 static struct vio_driver ibmvnic_driver = {
3632         .id_table       = ibmvnic_device_table,
3633         .probe          = ibmvnic_probe,
3634         .remove         = ibmvnic_remove,
3635         .get_desired_dma = ibmvnic_get_desired_dma,
3636         .name           = ibmvnic_driver_name,
3637         .pm             = &ibmvnic_pm_ops,
3638 };
3639
3640 /* module functions */
3641 static int __init ibmvnic_module_init(void)
3642 {
3643         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3644                 IBMVNIC_DRIVER_VERSION);
3645
3646         return vio_register_driver(&ibmvnic_driver);
3647 }
3648
3649 static void __exit ibmvnic_module_exit(void)
3650 {
3651         vio_unregister_driver(&ibmvnic_driver);
3652 }
3653
3654 module_init(ibmvnic_module_init);
3655 module_exit(ibmvnic_module_exit);