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