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
  78 #include "ibmvnic.h"
  79
  80 static const char ibmvnic_driver_name[] = "ibmvnic";
  81 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  82
  83 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  84 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  85 MODULE_LICENSE("GPL");
  86 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  87
  88 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  89 static int ibmvnic_remove(struct vio_dev *);
  90 static void release_sub_crqs(struct ibmvnic_adapter *);
  91 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  92 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  93 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  94 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  95 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  96                        union sub_crq *sub_crq);
  97 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
  98 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
  99 static int enable_scrq_irq(struct ibmvnic_adapter *,
 100                            struct ibmvnic_sub_crq_queue *);
 101 static int disable_scrq_irq(struct ibmvnic_adapter *,
 102                             struct ibmvnic_sub_crq_queue *);
 103 static int pending_scrq(struct ibmvnic_adapter *,
 104                         struct ibmvnic_sub_crq_queue *);
 105 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 106                                         struct ibmvnic_sub_crq_queue *);
 107 static int ibmvnic_poll(struct napi_struct *napi, int data);
 108 static void send_map_query(struct ibmvnic_adapter *adapter);
 109 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 110 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 111 static void send_login(struct ibmvnic_adapter *adapter);
 112 static void send_cap_queries(struct ibmvnic_adapter *adapter);
 113 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
 114 static int ibmvnic_init(struct ibmvnic_adapter *);
 115 static void release_crq_queue(struct ibmvnic_adapter *);
 116
 117 struct ibmvnic_stat {
 118         char name[ETH_GSTRING_LEN];
 119         int offset;
 120 };
 121
 122 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 123                              offsetof(struct ibmvnic_statistics, stat))
 124 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 125
 126 static const struct ibmvnic_stat ibmvnic_stats[] = {
 127         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 128         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 129         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 130         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 131         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 132         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 133         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 134         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 135         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 136         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 137         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 138         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 139         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 140         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 141         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 142         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 143         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 144         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 145         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 146         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 147         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 148         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 149 };
 150
 151 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 152                           unsigned long length, unsigned long *number,
 153                           unsigned long *irq)
 154 {
 155         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 156         long rc;
 157
 158         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 159         *number = retbuf[0];
 160         *irq = retbuf[1];
 161
 162         return rc;
 163 }
 164
 165 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 166                                 struct ibmvnic_long_term_buff *ltb, int size)
 167 {
 168         struct device *dev = &adapter->vdev->dev;
 169
 170         ltb->size = size;
 171         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 172                                        GFP_KERNEL);
 173
 174         if (!ltb->buff) {
 175                 dev_err(dev, "Couldn't alloc long term buffer\n");
 176                 return -ENOMEM;
 177         }
 178         ltb->map_id = adapter->map_id;
 179         adapter->map_id++;
 180
 181         init_completion(&adapter->fw_done);
 182         send_request_map(adapter, ltb->addr,
 183                          ltb->size, ltb->map_id);
 184         wait_for_completion(&adapter->fw_done);
 185         return 0;
 186 }
 187
 188 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 189                                 struct ibmvnic_long_term_buff *ltb)
 190 {
 191         struct device *dev = &adapter->vdev->dev;
 192
 193         if (!ltb->buff)
 194                 return;
 195
 196         if (!adapter->failover)
 197                 send_request_unmap(adapter, ltb->map_id);
 198         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 199 }
 200
 201 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 202                               struct ibmvnic_rx_pool *pool)
 203 {
 204         int count = pool->size - atomic_read(&pool->available);
 205         struct device *dev = &adapter->vdev->dev;
 206         int buffers_added = 0;
 207         unsigned long lpar_rc;
 208         union sub_crq sub_crq;
 209         struct sk_buff *skb;
 210         unsigned int offset;
 211         dma_addr_t dma_addr;
 212         unsigned char *dst;
 213         u64 *handle_array;
 214         int shift = 0;
 215         int index;
 216         int i;
 217
 218         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 219                                       be32_to_cpu(adapter->login_rsp_buf->
 220                                       off_rxadd_subcrqs));
 221
 222         for (i = 0; i < count; ++i) {
 223                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 224                 if (!skb) {
 225                         dev_err(dev, "Couldn't replenish rx buff\n");
 226                         adapter->replenish_no_mem++;
 227                         break;
 228                 }
 229
 230                 index = pool->free_map[pool->next_free];
 231
 232                 if (pool->rx_buff[index].skb)
 233                         dev_err(dev, "Inconsistent free_map!\n");
 234
 235                 /* Copy the skb to the long term mapped DMA buffer */
 236                 offset = index * pool->buff_size;
 237                 dst = pool->long_term_buff.buff + offset;
 238                 memset(dst, 0, pool->buff_size);
 239                 dma_addr = pool->long_term_buff.addr + offset;
 240                 pool->rx_buff[index].data = dst;
 241
 242                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 243                 pool->rx_buff[index].dma = dma_addr;
 244                 pool->rx_buff[index].skb = skb;
 245                 pool->rx_buff[index].pool_index = pool->index;
 246                 pool->rx_buff[index].size = pool->buff_size;
 247
 248                 memset(&sub_crq, 0, sizeof(sub_crq));
 249                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 250                 sub_crq.rx_add.correlator =
 251                     cpu_to_be64((u64)&pool->rx_buff[index]);
 252                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 253                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 254
 255                 /* The length field of the sCRQ is defined to be 24 bits so the
 256                  * buffer size needs to be left shifted by a byte before it is
 257                  * converted to big endian to prevent the last byte from being
 258                  * truncated.
 259                  */
 260 #ifdef __LITTLE_ENDIAN__
 261                 shift = 8;
 262 #endif
 263                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 264
 265                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 266                                       &sub_crq);
 267                 if (lpar_rc != H_SUCCESS)
 268                         goto failure;
 269
 270                 buffers_added++;
 271                 adapter->replenish_add_buff_success++;
 272                 pool->next_free = (pool->next_free + 1) % pool->size;
 273         }
 274         atomic_add(buffers_added, &pool->available);
 275         return;
 276
 277 failure:
 278         dev_info(dev, "replenish pools failure\n");
 279         pool->free_map[pool->next_free] = index;
 280         pool->rx_buff[index].skb = NULL;
 281         if (!dma_mapping_error(dev, dma_addr))
 282                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 283                                  DMA_FROM_DEVICE);
 284
 285         dev_kfree_skb_any(skb);
 286         adapter->replenish_add_buff_failure++;
 287         atomic_add(buffers_added, &pool->available);
 288 }
 289
 290 static void replenish_pools(struct ibmvnic_adapter *adapter)
 291 {
 292         int i;
 293
 294         if (adapter->migrated)
 295                 return;
 296
 297         adapter->replenish_task_cycles++;
 298         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 299              i++) {
 300                 if (adapter->rx_pool[i].active)
 301                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 302         }
 303 }
 304
 305 static void release_stats_token(struct ibmvnic_adapter *adapter)
 306 {
 307         struct device *dev = &adapter->vdev->dev;
 308
 309         if (!adapter->stats_token)
 310                 return;
 311
 312         dma_unmap_single(dev, adapter->stats_token,
 313                          sizeof(struct ibmvnic_statistics),
 314                          DMA_FROM_DEVICE);
 315         adapter->stats_token = 0;
 316 }
 317
 318 static int init_stats_token(struct ibmvnic_adapter *adapter)
 319 {
 320         struct device *dev = &adapter->vdev->dev;
 321         dma_addr_t stok;
 322
 323         stok = dma_map_single(dev, &adapter->stats,
 324                               sizeof(struct ibmvnic_statistics),
 325                               DMA_FROM_DEVICE);
 326         if (dma_mapping_error(dev, stok)) {
 327                 dev_err(dev, "Couldn't map stats buffer\n");
 328                 return -1;
 329         }
 330
 331         adapter->stats_token = stok;
 332         return 0;
 333 }
 334
 335 static void release_rx_pools(struct ibmvnic_adapter *adapter)
 336 {
 337         struct ibmvnic_rx_pool *rx_pool;
 338         int rx_scrqs;
 339         int i, j;
 340
 341         if (!adapter->rx_pool)
 342                 return;
 343
 344         rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 345         for (i = 0; i < rx_scrqs; i++) {
 346                 rx_pool = &adapter->rx_pool[i];
 347
 348                 kfree(rx_pool->free_map);
 349                 free_long_term_buff(adapter, &rx_pool->long_term_buff);
 350
 351                 if (!rx_pool->rx_buff)
 352                 continue;
 353
 354                 for (j = 0; j < rx_pool->size; j++) {
 355                         if (rx_pool->rx_buff[j].skb) {
 356                                 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
 357                                 rx_pool->rx_buff[i].skb = NULL;
 358                         }
 359                 }
 360
 361                 kfree(rx_pool->rx_buff);
 362         }
 363
 364         kfree(adapter->rx_pool);
 365         adapter->rx_pool = NULL;
 366 }
 367
 368 static int init_rx_pools(struct net_device *netdev)
 369 {
 370         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 371         struct device *dev = &adapter->vdev->dev;
 372         struct ibmvnic_rx_pool *rx_pool;
 373         int rxadd_subcrqs;
 374         u64 *size_array;
 375         int i, j;
 376
 377         rxadd_subcrqs =
 378                 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 379         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 380                 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 381
 382         adapter->rx_pool = kcalloc(rxadd_subcrqs,
 383                                    sizeof(struct ibmvnic_rx_pool),
 384                                    GFP_KERNEL);
 385         if (!adapter->rx_pool) {
 386                 dev_err(dev, "Failed to allocate rx pools\n");
 387                 return -1;
 388         }
 389
 390         for (i = 0; i < rxadd_subcrqs; i++) {
 391                 rx_pool = &adapter->rx_pool[i];
 392
 393                 netdev_dbg(adapter->netdev,
 394                            "Initializing rx_pool %d, %lld buffs, %lld bytes each\n",
 395                            i, adapter->req_rx_add_entries_per_subcrq,
 396                            be64_to_cpu(size_array[i]));
 397
 398                 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
 399                 rx_pool->index = i;
 400                 rx_pool->buff_size = be64_to_cpu(size_array[i]);
 401                 rx_pool->active = 1;
 402
 403                 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
 404                                             GFP_KERNEL);
 405                 if (!rx_pool->free_map) {
 406                         release_rx_pools(adapter);
 407                         return -1;
 408                 }
 409
 410                 rx_pool->rx_buff = kcalloc(rx_pool->size,
 411                                            sizeof(struct ibmvnic_rx_buff),
 412                                            GFP_KERNEL);
 413                 if (!rx_pool->rx_buff) {
 414                         dev_err(dev, "Couldn't alloc rx buffers\n");
 415                         release_rx_pools(adapter);
 416                         return -1;
 417                 }
 418
 419                 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
 420                                          rx_pool->size * rx_pool->buff_size)) {
 421                         release_rx_pools(adapter);
 422                         return -1;
 423                 }
 424
 425                 for (j = 0; j < rx_pool->size; ++j)
 426                         rx_pool->free_map[j] = j;
 427
 428                 atomic_set(&rx_pool->available, 0);
 429                 rx_pool->next_alloc = 0;
 430                 rx_pool->next_free = 0;
 431         }
 432
 433         return 0;
 434 }
 435
 436 static void release_tx_pools(struct ibmvnic_adapter *adapter)
 437 {
 438         struct ibmvnic_tx_pool *tx_pool;
 439         int i, tx_scrqs;
 440
 441         if (!adapter->tx_pool)
 442                 return;
 443
 444         tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 445         for (i = 0; i < tx_scrqs; i++) {
 446                 tx_pool = &adapter->tx_pool[i];
 447                 kfree(tx_pool->tx_buff);
 448                 free_long_term_buff(adapter, &tx_pool->long_term_buff);
 449                 kfree(tx_pool->free_map);
 450         }
 451
 452         kfree(adapter->tx_pool);
 453         adapter->tx_pool = NULL;
 454 }
 455
 456 static int init_tx_pools(struct net_device *netdev)
 457 {
 458         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 459         struct device *dev = &adapter->vdev->dev;
 460         struct ibmvnic_tx_pool *tx_pool;
 461         int tx_subcrqs;
 462         int i, j;
 463
 464         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 465         adapter->tx_pool = kcalloc(tx_subcrqs,
 466                                    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 467         if (!adapter->tx_pool)
 468                 return -1;
 469
 470         for (i = 0; i < tx_subcrqs; i++) {
 471                 tx_pool = &adapter->tx_pool[i];
 472                 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
 473                                            sizeof(struct ibmvnic_tx_buff),
 474                                            GFP_KERNEL);
 475                 if (!tx_pool->tx_buff) {
 476                         dev_err(dev, "tx pool buffer allocation failed\n");
 477                         release_tx_pools(adapter);
 478                         return -1;
 479                 }
 480
 481                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 482                                          adapter->req_tx_entries_per_subcrq *
 483                                          adapter->req_mtu)) {
 484                         release_tx_pools(adapter);
 485                         return -1;
 486                 }
 487
 488                 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
 489                                             sizeof(int), GFP_KERNEL);
 490                 if (!tx_pool->free_map) {
 491                         release_tx_pools(adapter);
 492                         return -1;
 493                 }
 494
 495                 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
 496                         tx_pool->free_map[j] = j;
 497
 498                 tx_pool->consumer_index = 0;
 499                 tx_pool->producer_index = 0;
 500         }
 501
 502         return 0;
 503 }
 504
 505 static void release_bounce_buffer(struct ibmvnic_adapter *adapter)
 506 {
 507         struct device *dev = &adapter->vdev->dev;
 508
 509         if (!adapter->bounce_buffer)
 510                 return;
 511
 512         if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 513                 dma_unmap_single(dev, adapter->bounce_buffer_dma,
 514                                  adapter->bounce_buffer_size,
 515                                  DMA_BIDIRECTIONAL);
 516                 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
 517         }
 518
 519         kfree(adapter->bounce_buffer);
 520         adapter->bounce_buffer = NULL;
 521 }
 522
 523 static int init_bounce_buffer(struct net_device *netdev)
 524 {
 525         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 526         struct device *dev = &adapter->vdev->dev;
 527         char *buf;
 528         int buf_sz;
 529         dma_addr_t map_addr;
 530
 531         buf_sz = (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
 532         buf = kmalloc(adapter->bounce_buffer_size, GFP_KERNEL);
 533         if (!buf)
 534                 return -1;
 535
 536         map_addr = dma_map_single(dev, buf, buf_sz, DMA_TO_DEVICE);
 537         if (dma_mapping_error(dev, map_addr)) {
 538                 dev_err(dev, "Couldn't map bounce buffer\n");
 539                 kfree(buf);
 540                 return -1;
 541         }
 542
 543         adapter->bounce_buffer = buf;
 544         adapter->bounce_buffer_size = buf_sz;
 545         adapter->bounce_buffer_dma = map_addr;
 546         return 0;
 547 }
 548
 549 static int ibmvnic_login(struct net_device *netdev)
 550 {
 551         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 552         unsigned long timeout = msecs_to_jiffies(30000);
 553         struct device *dev = &adapter->vdev->dev;
 554
 555         do {
 556                 if (adapter->renegotiate) {
 557                         adapter->renegotiate = false;
 558                         release_sub_crqs(adapter);
 559
 560                         reinit_completion(&adapter->init_done);
 561                         send_cap_queries(adapter);
 562                         if (!wait_for_completion_timeout(&adapter->init_done,
 563                                                          timeout)) {
 564                                 dev_err(dev, "Capabilities query timeout\n");
 565                                 return -1;
 566                         }
 567                 }
 568
 569                 reinit_completion(&adapter->init_done);
 570                 send_login(adapter);
 571                 if (!wait_for_completion_timeout(&adapter->init_done,
 572                                                  timeout)) {
 573                         dev_err(dev, "Login timeout\n");
 574                         return -1;
 575                 }
 576         } while (adapter->renegotiate);
 577
 578         return 0;
 579 }
 580
 581 static void release_resources(struct ibmvnic_adapter *adapter)
 582 {
 583         release_bounce_buffer(adapter);
 584         release_tx_pools(adapter);
 585         release_rx_pools(adapter);
 586
 587         release_sub_crqs(adapter);
 588         release_crq_queue(adapter);
 589
 590         release_stats_token(adapter);
 591 }
 592
 593 static int ibmvnic_open(struct net_device *netdev)
 594 {
 595         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 596         struct device *dev = &adapter->vdev->dev;
 597         union ibmvnic_crq crq;
 598         int rc = 0;
 599         int i;
 600
 601         if (adapter->is_closed) {
 602                 rc = ibmvnic_init(adapter);
 603                 if (rc)
 604                         return rc;
 605         }
 606
 607         rc = ibmvnic_login(netdev);
 608         if (rc)
 609                 return rc;
 610
 611         rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
 612         if (rc) {
 613                 dev_err(dev, "failed to set the number of tx queues\n");
 614                 return -1;
 615         }
 616
 617         rc = init_sub_crq_irqs(adapter);
 618         if (rc) {
 619                 dev_err(dev, "failed to initialize sub crq irqs\n");
 620                 return -1;
 621         }
 622
 623         adapter->map_id = 1;
 624         adapter->napi = kcalloc(adapter->req_rx_queues,
 625                                 sizeof(struct napi_struct), GFP_KERNEL);
 626         if (!adapter->napi)
 627                 goto ibmvnic_open_fail;
 628         for (i = 0; i < adapter->req_rx_queues; i++) {
 629                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 630                                NAPI_POLL_WEIGHT);
 631                 napi_enable(&adapter->napi[i]);
 632         }
 633
 634         send_map_query(adapter);
 635
 636         rc = init_rx_pools(netdev);
 637         if (rc)
 638                 goto ibmvnic_open_fail;
 639
 640         rc = init_tx_pools(netdev);
 641         if (rc)
 642                 goto ibmvnic_open_fail;
 643
 644         rc = init_bounce_buffer(netdev);
 645         if (rc)
 646                 goto ibmvnic_open_fail;
 647
 648         replenish_pools(adapter);
 649
 650         /* We're ready to receive frames, enable the sub-crq interrupts and
 651          * set the logical link state to up
 652          */
 653         for (i = 0; i < adapter->req_rx_queues; i++)
 654                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 655
 656         for (i = 0; i < adapter->req_tx_queues; i++)
 657                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 658
 659         memset(&crq, 0, sizeof(crq));
 660         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 661         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 662         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
 663         ibmvnic_send_crq(adapter, &crq);
 664
 665         netif_tx_start_all_queues(netdev);
 666         adapter->is_closed = false;
 667
 668         return 0;
 669
 670 ibmvnic_open_fail:
 671         for (i = 0; i < adapter->req_rx_queues; i++)
 672                 napi_disable(&adapter->napi[i]);
 673         release_resources(adapter);
 674         return -ENOMEM;
 675 }
 676
 677 static int ibmvnic_close(struct net_device *netdev)
 678 {
 679         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 680         union ibmvnic_crq crq;
 681         int i;
 682
 683         adapter->closing = true;
 684
 685         for (i = 0; i < adapter->req_rx_queues; i++)
 686                 napi_disable(&adapter->napi[i]);
 687
 688         if (!adapter->failover)
 689                 netif_tx_stop_all_queues(netdev);
 690
 691         memset(&crq, 0, sizeof(crq));
 692         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 693         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 694         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
 695         ibmvnic_send_crq(adapter, &crq);
 696
 697         release_resources(adapter);
 698
 699         adapter->is_closed = true;
 700         adapter->closing = false;
 701         return 0;
 702 }
 703
 704 /**
 705  * build_hdr_data - creates L2/L3/L4 header data buffer
 706  * @hdr_field - bitfield determining needed headers
 707  * @skb - socket buffer
 708  * @hdr_len - array of header lengths
 709  * @tot_len - total length of data
 710  *
 711  * Reads hdr_field to determine which headers are needed by firmware.
 712  * Builds a buffer containing these headers.  Saves individual header
 713  * lengths and total buffer length to be used to build descriptors.
 714  */
 715 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 716                           int *hdr_len, u8 *hdr_data)
 717 {
 718         int len = 0;
 719         u8 *hdr;
 720
 721         hdr_len[0] = sizeof(struct ethhdr);
 722
 723         if (skb->protocol == htons(ETH_P_IP)) {
 724                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 725                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 726                         hdr_len[2] = tcp_hdrlen(skb);
 727                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 728                         hdr_len[2] = sizeof(struct udphdr);
 729         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 730                 hdr_len[1] = sizeof(struct ipv6hdr);
 731                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 732                         hdr_len[2] = tcp_hdrlen(skb);
 733                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 734                         hdr_len[2] = sizeof(struct udphdr);
 735         }
 736
 737         memset(hdr_data, 0, 120);
 738         if ((hdr_field >> 6) & 1) {
 739                 hdr = skb_mac_header(skb);
 740                 memcpy(hdr_data, hdr, hdr_len[0]);
 741                 len += hdr_len[0];
 742         }
 743
 744         if ((hdr_field >> 5) & 1) {
 745                 hdr = skb_network_header(skb);
 746                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 747                 len += hdr_len[1];
 748         }
 749
 750         if ((hdr_field >> 4) & 1) {
 751                 hdr = skb_transport_header(skb);
 752                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 753                 len += hdr_len[2];
 754         }
 755         return len;
 756 }
 757
 758 /**
 759  * create_hdr_descs - create header and header extension descriptors
 760  * @hdr_field - bitfield determining needed headers
 761  * @data - buffer containing header data
 762  * @len - length of data buffer
 763  * @hdr_len - array of individual header lengths
 764  * @scrq_arr - descriptor array
 765  *
 766  * Creates header and, if needed, header extension descriptors and
 767  * places them in a descriptor array, scrq_arr
 768  */
 769
 770 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 771                              union sub_crq *scrq_arr)
 772 {
 773         union sub_crq hdr_desc;
 774         int tmp_len = len;
 775         u8 *data, *cur;
 776         int tmp;
 777
 778         while (tmp_len > 0) {
 779                 cur = hdr_data + len - tmp_len;
 780
 781                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 782                 if (cur != hdr_data) {
 783                         data = hdr_desc.hdr_ext.data;
 784                         tmp = tmp_len > 29 ? 29 : tmp_len;
 785                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 786                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 787                         hdr_desc.hdr_ext.len = tmp;
 788                 } else {
 789                         data = hdr_desc.hdr.data;
 790                         tmp = tmp_len > 24 ? 24 : tmp_len;
 791                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 792                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 793                         hdr_desc.hdr.len = tmp;
 794                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 795                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 796                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 797                         hdr_desc.hdr.flag = hdr_field << 1;
 798                 }
 799                 memcpy(data, cur, tmp);
 800                 tmp_len -= tmp;
 801                 *scrq_arr = hdr_desc;
 802                 scrq_arr++;
 803         }
 804 }
 805
 806 /**
 807  * build_hdr_descs_arr - build a header descriptor array
 808  * @skb - socket buffer
 809  * @num_entries - number of descriptors to be sent
 810  * @subcrq - first TX descriptor
 811  * @hdr_field - bit field determining which headers will be sent
 812  *
 813  * This function will build a TX descriptor array with applicable
 814  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 815  */
 816
 817 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 818                                 int *num_entries, u8 hdr_field)
 819 {
 820         int hdr_len[3] = {0, 0, 0};
 821         int tot_len, len;
 822         u8 *hdr_data = txbuff->hdr_data;
 823
 824         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 825                                  txbuff->hdr_data);
 826         len = tot_len;
 827         len -= 24;
 828         if (len > 0)
 829                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 830         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 831                          txbuff->indir_arr + 1);
 832 }
 833
 834 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 835 {
 836         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 837         int queue_num = skb_get_queue_mapping(skb);
 838         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 839         struct device *dev = &adapter->vdev->dev;
 840         struct ibmvnic_tx_buff *tx_buff = NULL;
 841         struct ibmvnic_sub_crq_queue *tx_scrq;
 842         struct ibmvnic_tx_pool *tx_pool;
 843         unsigned int tx_send_failed = 0;
 844         unsigned int tx_map_failed = 0;
 845         unsigned int tx_dropped = 0;
 846         unsigned int tx_packets = 0;
 847         unsigned int tx_bytes = 0;
 848         dma_addr_t data_dma_addr;
 849         struct netdev_queue *txq;
 850         bool used_bounce = false;
 851         unsigned long lpar_rc;
 852         union sub_crq tx_crq;
 853         unsigned int offset;
 854         int num_entries = 1;
 855         unsigned char *dst;
 856         u64 *handle_array;
 857         int index = 0;
 858         int ret = 0;
 859
 860         tx_pool = &adapter->tx_pool[queue_num];
 861         tx_scrq = adapter->tx_scrq[queue_num];
 862         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 863         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 864                                    be32_to_cpu(adapter->login_rsp_buf->
 865                                                off_txsubm_subcrqs));
 866         if (adapter->migrated) {
 867                 tx_send_failed++;
 868                 tx_dropped++;
 869                 ret = NETDEV_TX_BUSY;
 870                 goto out;
 871         }
 872
 873         index = tx_pool->free_map[tx_pool->consumer_index];
 874         offset = index * adapter->req_mtu;
 875         dst = tx_pool->long_term_buff.buff + offset;
 876         memset(dst, 0, adapter->req_mtu);
 877         skb_copy_from_linear_data(skb, dst, skb->len);
 878         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 879
 880         tx_pool->consumer_index =
 881             (tx_pool->consumer_index + 1) %
 882                 adapter->req_tx_entries_per_subcrq;
 883
 884         tx_buff = &tx_pool->tx_buff[index];
 885         tx_buff->skb = skb;
 886         tx_buff->data_dma[0] = data_dma_addr;
 887         tx_buff->data_len[0] = skb->len;
 888         tx_buff->index = index;
 889         tx_buff->pool_index = queue_num;
 890         tx_buff->last_frag = true;
 891         tx_buff->used_bounce = used_bounce;
 892
 893         memset(&tx_crq, 0, sizeof(tx_crq));
 894         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 895         tx_crq.v1.type = IBMVNIC_TX_DESC;
 896         tx_crq.v1.n_crq_elem = 1;
 897         tx_crq.v1.n_sge = 1;
 898         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 899         tx_crq.v1.correlator = cpu_to_be32(index);
 900         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 901         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 902         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 903
 904         if (adapter->vlan_header_insertion) {
 905                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 906                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 907         }
 908
 909         if (skb->protocol == htons(ETH_P_IP)) {
 910                 if (ip_hdr(skb)->version == 4)
 911                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 912                 else if (ip_hdr(skb)->version == 6)
 913                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 914
 915                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 916                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 917                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 918                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 919         }
 920
 921         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 922                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 923                 hdrs += 2;
 924         }
 925         /* determine if l2/3/4 headers are sent to firmware */
 926         if ((*hdrs >> 7) & 1 &&
 927             (skb->protocol == htons(ETH_P_IP) ||
 928              skb->protocol == htons(ETH_P_IPV6))) {
 929                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 930                 tx_crq.v1.n_crq_elem = num_entries;
 931                 tx_buff->indir_arr[0] = tx_crq;
 932                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 933                                                     sizeof(tx_buff->indir_arr),
 934                                                     DMA_TO_DEVICE);
 935                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 936                         if (!firmware_has_feature(FW_FEATURE_CMO))
 937                                 dev_err(dev, "tx: unable to map descriptor array\n");
 938                         tx_map_failed++;
 939                         tx_dropped++;
 940                         ret = NETDEV_TX_BUSY;
 941                         goto out;
 942                 }
 943                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 944                                                (u64)tx_buff->indir_dma,
 945                                                (u64)num_entries);
 946         } else {
 947                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 948                                       &tx_crq);
 949         }
 950         if (lpar_rc != H_SUCCESS) {
 951                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 952
 953                 if (tx_pool->consumer_index == 0)
 954                         tx_pool->consumer_index =
 955                                 adapter->req_tx_entries_per_subcrq - 1;
 956                 else
 957                         tx_pool->consumer_index--;
 958
 959                 tx_send_failed++;
 960                 tx_dropped++;
 961                 ret = NETDEV_TX_BUSY;
 962                 goto out;
 963         }
 964
 965         if (atomic_inc_return(&tx_scrq->used)
 966                                         >= adapter->req_tx_entries_per_subcrq) {
 967                 netdev_info(netdev, "Stopping queue %d\n", queue_num);
 968                 netif_stop_subqueue(netdev, queue_num);
 969         }
 970
 971         tx_packets++;
 972         tx_bytes += skb->len;
 973         txq->trans_start = jiffies;
 974         ret = NETDEV_TX_OK;
 975
 976 out:
 977         netdev->stats.tx_dropped += tx_dropped;
 978         netdev->stats.tx_bytes += tx_bytes;
 979         netdev->stats.tx_packets += tx_packets;
 980         adapter->tx_send_failed += tx_send_failed;
 981         adapter->tx_map_failed += tx_map_failed;
 982
 983         return ret;
 984 }
 985
 986 static void ibmvnic_set_multi(struct net_device *netdev)
 987 {
 988         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 989         struct netdev_hw_addr *ha;
 990         union ibmvnic_crq crq;
 991
 992         memset(&crq, 0, sizeof(crq));
 993         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 994         crq.request_capability.cmd = REQUEST_CAPABILITY;
 995
 996         if (netdev->flags & IFF_PROMISC) {
 997                 if (!adapter->promisc_supported)
 998                         return;
 999         } else {
1000                 if (netdev->flags & IFF_ALLMULTI) {
1001                         /* Accept all multicast */
1002                         memset(&crq, 0, sizeof(crq));
1003                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1004                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1005                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1006                         ibmvnic_send_crq(adapter, &crq);
1007                 } else if (netdev_mc_empty(netdev)) {
1008                         /* Reject all multicast */
1009                         memset(&crq, 0, sizeof(crq));
1010                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1011                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1012                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1013                         ibmvnic_send_crq(adapter, &crq);
1014                 } else {
1015                         /* Accept one or more multicast(s) */
1016                         netdev_for_each_mc_addr(ha, netdev) {
1017                                 memset(&crq, 0, sizeof(crq));
1018                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1019                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1020                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1021                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1022                                                 ha->addr);
1023                                 ibmvnic_send_crq(adapter, &crq);
1024                         }
1025                 }
1026         }
1027 }
1028
1029 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1030 {
1031         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1032         struct sockaddr *addr = p;
1033         union ibmvnic_crq crq;
1034
1035         if (!is_valid_ether_addr(addr->sa_data))
1036                 return -EADDRNOTAVAIL;
1037
1038         memset(&crq, 0, sizeof(crq));
1039         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1040         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1041         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1042         ibmvnic_send_crq(adapter, &crq);
1043         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1044         return 0;
1045 }
1046
1047 static void ibmvnic_tx_timeout(struct net_device *dev)
1048 {
1049         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1050         int rc;
1051
1052         /* Adapter timed out, resetting it */
1053         release_sub_crqs(adapter);
1054         rc = ibmvnic_reset_crq(adapter);
1055         if (rc)
1056                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
1057         else
1058                 ibmvnic_send_crq_init(adapter);
1059 }
1060
1061 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1062                                   struct ibmvnic_rx_buff *rx_buff)
1063 {
1064         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1065
1066         rx_buff->skb = NULL;
1067
1068         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1069         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1070
1071         atomic_dec(&pool->available);
1072 }
1073
1074 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1075 {
1076         struct net_device *netdev = napi->dev;
1077         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1078         int scrq_num = (int)(napi - adapter->napi);
1079         int frames_processed = 0;
1080 restart_poll:
1081         while (frames_processed < budget) {
1082                 struct sk_buff *skb;
1083                 struct ibmvnic_rx_buff *rx_buff;
1084                 union sub_crq *next;
1085                 u32 length;
1086                 u16 offset;
1087                 u8 flags = 0;
1088
1089                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1090                         break;
1091                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1092                 rx_buff =
1093                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1094                                                           rx_comp.correlator);
1095                 /* do error checking */
1096                 if (next->rx_comp.rc) {
1097                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
1098                         /* free the entry */
1099                         next->rx_comp.first = 0;
1100                         remove_buff_from_pool(adapter, rx_buff);
1101                         break;
1102                 }
1103
1104                 length = be32_to_cpu(next->rx_comp.len);
1105                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1106                 flags = next->rx_comp.flags;
1107                 skb = rx_buff->skb;
1108                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1109                                         length);
1110                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
1111                 /* free the entry */
1112                 next->rx_comp.first = 0;
1113                 remove_buff_from_pool(adapter, rx_buff);
1114
1115                 skb_put(skb, length);
1116                 skb->protocol = eth_type_trans(skb, netdev);
1117
1118                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1119                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1120                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1121                 }
1122
1123                 length = skb->len;
1124                 napi_gro_receive(napi, skb); /* send it up */
1125                 netdev->stats.rx_packets++;
1126                 netdev->stats.rx_bytes += length;
1127                 frames_processed++;
1128         }
1129         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1130
1131         if (frames_processed < budget) {
1132                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1133                 napi_complete_done(napi, frames_processed);
1134                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1135                     napi_reschedule(napi)) {
1136                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1137                         goto restart_poll;
1138                 }
1139         }
1140         return frames_processed;
1141 }
1142
1143 #ifdef CONFIG_NET_POLL_CONTROLLER
1144 static void ibmvnic_netpoll_controller(struct net_device *dev)
1145 {
1146         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1147         int i;
1148
1149         replenish_pools(netdev_priv(dev));
1150         for (i = 0; i < adapter->req_rx_queues; i++)
1151                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1152                                      adapter->rx_scrq[i]);
1153 }
1154 #endif
1155
1156 static const struct net_device_ops ibmvnic_netdev_ops = {
1157         .ndo_open               = ibmvnic_open,
1158         .ndo_stop               = ibmvnic_close,
1159         .ndo_start_xmit         = ibmvnic_xmit,
1160         .ndo_set_rx_mode        = ibmvnic_set_multi,
1161         .ndo_set_mac_address    = ibmvnic_set_mac,
1162         .ndo_validate_addr      = eth_validate_addr,
1163         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1164 #ifdef CONFIG_NET_POLL_CONTROLLER
1165         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1166 #endif
1167 };
1168
1169 /* ethtool functions */
1170
1171 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1172                                       struct ethtool_link_ksettings *cmd)
1173 {
1174         u32 supported, advertising;
1175
1176         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1177                           SUPPORTED_FIBRE);
1178         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1179                             ADVERTISED_FIBRE);
1180         cmd->base.speed = SPEED_1000;
1181         cmd->base.duplex = DUPLEX_FULL;
1182         cmd->base.port = PORT_FIBRE;
1183         cmd->base.phy_address = 0;
1184         cmd->base.autoneg = AUTONEG_ENABLE;
1185
1186         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1187                                                 supported);
1188         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1189                                                 advertising);
1190
1191         return 0;
1192 }
1193
1194 static void ibmvnic_get_drvinfo(struct net_device *dev,
1195                                 struct ethtool_drvinfo *info)
1196 {
1197         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1198         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1199 }
1200
1201 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1202 {
1203         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1204
1205         return adapter->msg_enable;
1206 }
1207
1208 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1209 {
1210         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1211
1212         adapter->msg_enable = data;
1213 }
1214
1215 static u32 ibmvnic_get_link(struct net_device *netdev)
1216 {
1217         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1218
1219         /* Don't need to send a query because we request a logical link up at
1220          * init and then we wait for link state indications
1221          */
1222         return adapter->logical_link_state;
1223 }
1224
1225 static void ibmvnic_get_ringparam(struct net_device *netdev,
1226                                   struct ethtool_ringparam *ring)
1227 {
1228         ring->rx_max_pending = 0;
1229         ring->tx_max_pending = 0;
1230         ring->rx_mini_max_pending = 0;
1231         ring->rx_jumbo_max_pending = 0;
1232         ring->rx_pending = 0;
1233         ring->tx_pending = 0;
1234         ring->rx_mini_pending = 0;
1235         ring->rx_jumbo_pending = 0;
1236 }
1237
1238 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1239 {
1240         int i;
1241
1242         if (stringset != ETH_SS_STATS)
1243                 return;
1244
1245         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1246                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1247 }
1248
1249 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1250 {
1251         switch (sset) {
1252         case ETH_SS_STATS:
1253                 return ARRAY_SIZE(ibmvnic_stats);
1254         default:
1255                 return -EOPNOTSUPP;
1256         }
1257 }
1258
1259 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1260                                       struct ethtool_stats *stats, u64 *data)
1261 {
1262         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1263         union ibmvnic_crq crq;
1264         int i;
1265
1266         memset(&crq, 0, sizeof(crq));
1267         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1268         crq.request_statistics.cmd = REQUEST_STATISTICS;
1269         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1270         crq.request_statistics.len =
1271             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1272
1273         /* Wait for data to be written */
1274         init_completion(&adapter->stats_done);
1275         ibmvnic_send_crq(adapter, &crq);
1276         wait_for_completion(&adapter->stats_done);
1277
1278         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1279                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1280 }
1281
1282 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1283         .get_drvinfo            = ibmvnic_get_drvinfo,
1284         .get_msglevel           = ibmvnic_get_msglevel,
1285         .set_msglevel           = ibmvnic_set_msglevel,
1286         .get_link               = ibmvnic_get_link,
1287         .get_ringparam          = ibmvnic_get_ringparam,
1288         .get_strings            = ibmvnic_get_strings,
1289         .get_sset_count         = ibmvnic_get_sset_count,
1290         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1291         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1292 };
1293
1294 /* Routines for managing CRQs/sCRQs  */
1295
1296 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1297                                   struct ibmvnic_sub_crq_queue *scrq)
1298 {
1299         struct device *dev = &adapter->vdev->dev;
1300         long rc;
1301
1302         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1303
1304         /* Close the sub-crqs */
1305         do {
1306                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1307                                         adapter->vdev->unit_address,
1308                                         scrq->crq_num);
1309         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1310
1311         if (rc) {
1312                 netdev_err(adapter->netdev,
1313                            "Failed to release sub-CRQ %16lx, rc = %ld\n",
1314                            scrq->crq_num, rc);
1315         }
1316
1317         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1318                          DMA_BIDIRECTIONAL);
1319         free_pages((unsigned long)scrq->msgs, 2);
1320         kfree(scrq);
1321 }
1322
1323 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1324                                                         *adapter)
1325 {
1326         struct device *dev = &adapter->vdev->dev;
1327         struct ibmvnic_sub_crq_queue *scrq;
1328         int rc;
1329
1330         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1331         if (!scrq)
1332                 return NULL;
1333
1334         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1335         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1336         if (!scrq->msgs) {
1337                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1338                 goto zero_page_failed;
1339         }
1340
1341         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1342                                          DMA_BIDIRECTIONAL);
1343         if (dma_mapping_error(dev, scrq->msg_token)) {
1344                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1345                 goto map_failed;
1346         }
1347
1348         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1349                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1350
1351         if (rc == H_RESOURCE)
1352                 rc = ibmvnic_reset_crq(adapter);
1353
1354         if (rc == H_CLOSED) {
1355                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1356         } else if (rc) {
1357                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1358                 goto reg_failed;
1359         }
1360
1361         scrq->adapter = adapter;
1362         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1363         scrq->cur = 0;
1364         atomic_set(&scrq->used, 0);
1365         scrq->rx_skb_top = NULL;
1366         spin_lock_init(&scrq->lock);
1367
1368         netdev_dbg(adapter->netdev,
1369                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1370                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1371
1372         return scrq;
1373
1374 reg_failed:
1375         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1376                          DMA_BIDIRECTIONAL);
1377 map_failed:
1378         free_pages((unsigned long)scrq->msgs, 2);
1379 zero_page_failed:
1380         kfree(scrq);
1381
1382         return NULL;
1383 }
1384
1385 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1386 {
1387         int i;
1388
1389         if (adapter->tx_scrq) {
1390                 for (i = 0; i < adapter->req_tx_queues; i++) {
1391                         if (!adapter->tx_scrq[i])
1392                                 continue;
1393
1394                         if (adapter->tx_scrq[i]->irq) {
1395                                 free_irq(adapter->tx_scrq[i]->irq,
1396                                          adapter->tx_scrq[i]);
1397                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1398                                 adapter->tx_scrq[i]->irq = 0;
1399                         }
1400
1401                         release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
1402                 }
1403
1404                 kfree(adapter->tx_scrq);
1405                 adapter->tx_scrq = NULL;
1406         }
1407
1408         if (adapter->rx_scrq) {
1409                 for (i = 0; i < adapter->req_rx_queues; i++) {
1410                         if (!adapter->rx_scrq[i])
1411                                 continue;
1412
1413                         if (adapter->rx_scrq[i]->irq) {
1414                                 free_irq(adapter->rx_scrq[i]->irq,
1415                                          adapter->rx_scrq[i]);
1416                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1417                                 adapter->rx_scrq[i]->irq = 0;
1418                         }
1419
1420                         release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
1421                 }
1422
1423                 kfree(adapter->rx_scrq);
1424                 adapter->rx_scrq = NULL;
1425         }
1426 }
1427
1428 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1429                             struct ibmvnic_sub_crq_queue *scrq)
1430 {
1431         struct device *dev = &adapter->vdev->dev;
1432         unsigned long rc;
1433
1434         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1435                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1436         if (rc)
1437                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1438                         scrq->hw_irq, rc);
1439         return rc;
1440 }
1441
1442 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1443                            struct ibmvnic_sub_crq_queue *scrq)
1444 {
1445         struct device *dev = &adapter->vdev->dev;
1446         unsigned long rc;
1447
1448         if (scrq->hw_irq > 0x100000000ULL) {
1449                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1450                 return 1;
1451         }
1452
1453         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1454                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1455         if (rc)
1456                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1457                         scrq->hw_irq, rc);
1458         return rc;
1459 }
1460
1461 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1462                                struct ibmvnic_sub_crq_queue *scrq)
1463 {
1464         struct device *dev = &adapter->vdev->dev;
1465         struct ibmvnic_tx_buff *txbuff;
1466         union sub_crq *next;
1467         int index;
1468         int i, j;
1469         u8 first;
1470
1471 restart_loop:
1472         while (pending_scrq(adapter, scrq)) {
1473                 unsigned int pool = scrq->pool_index;
1474
1475                 next = ibmvnic_next_scrq(adapter, scrq);
1476                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1477                         if (next->tx_comp.rcs[i]) {
1478                                 dev_err(dev, "tx error %x\n",
1479                                         next->tx_comp.rcs[i]);
1480                                 continue;
1481                         }
1482                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1483                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1484
1485                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1486                                 if (!txbuff->data_dma[j])
1487                                         continue;
1488
1489                                 txbuff->data_dma[j] = 0;
1490                                 txbuff->used_bounce = false;
1491                         }
1492                         /* if sub_crq was sent indirectly */
1493                         first = txbuff->indir_arr[0].generic.first;
1494                         if (first == IBMVNIC_CRQ_CMD) {
1495                                 dma_unmap_single(dev, txbuff->indir_dma,
1496                                                  sizeof(txbuff->indir_arr),
1497                                                  DMA_TO_DEVICE);
1498                         }
1499
1500                         if (txbuff->last_frag) {
1501                                 if (atomic_sub_return(next->tx_comp.num_comps,
1502                                                       &scrq->used) <=
1503                                     (adapter->req_tx_entries_per_subcrq / 2) &&
1504                                     netif_subqueue_stopped(adapter->netdev,
1505                                                            txbuff->skb)) {
1506                                         netif_wake_subqueue(adapter->netdev,
1507                                                             scrq->pool_index);
1508                                         netdev_dbg(adapter->netdev,
1509                                                    "Started queue %d\n",
1510                                                    scrq->pool_index);
1511                                 }
1512
1513                                 dev_kfree_skb_any(txbuff->skb);
1514                         }
1515
1516                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1517                                                      producer_index] = index;
1518                         adapter->tx_pool[pool].producer_index =
1519                             (adapter->tx_pool[pool].producer_index + 1) %
1520                             adapter->req_tx_entries_per_subcrq;
1521                 }
1522                 /* remove tx_comp scrq*/
1523                 next->tx_comp.first = 0;
1524         }
1525
1526         enable_scrq_irq(adapter, scrq);
1527
1528         if (pending_scrq(adapter, scrq)) {
1529                 disable_scrq_irq(adapter, scrq);
1530                 goto restart_loop;
1531         }
1532
1533         return 0;
1534 }
1535
1536 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1537 {
1538         struct ibmvnic_sub_crq_queue *scrq = instance;
1539         struct ibmvnic_adapter *adapter = scrq->adapter;
1540
1541         disable_scrq_irq(adapter, scrq);
1542         ibmvnic_complete_tx(adapter, scrq);
1543
1544         return IRQ_HANDLED;
1545 }
1546
1547 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1548 {
1549         struct ibmvnic_sub_crq_queue *scrq = instance;
1550         struct ibmvnic_adapter *adapter = scrq->adapter;
1551
1552         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1553                 disable_scrq_irq(adapter, scrq);
1554                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1555         }
1556
1557         return IRQ_HANDLED;
1558 }
1559
1560 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1561 {
1562         struct device *dev = &adapter->vdev->dev;
1563         struct ibmvnic_sub_crq_queue *scrq;
1564         int i = 0, j = 0;
1565         int rc = 0;
1566
1567         for (i = 0; i < adapter->req_tx_queues; i++) {
1568                 scrq = adapter->tx_scrq[i];
1569                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1570
1571                 if (!scrq->irq) {
1572                         rc = -EINVAL;
1573                         dev_err(dev, "Error mapping irq\n");
1574                         goto req_tx_irq_failed;
1575                 }
1576
1577                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1578                                  0, "ibmvnic_tx", scrq);
1579
1580                 if (rc) {
1581                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1582                                 scrq->irq, rc);
1583                         irq_dispose_mapping(scrq->irq);
1584                         goto req_rx_irq_failed;
1585                 }
1586         }
1587
1588         for (i = 0; i < adapter->req_rx_queues; i++) {
1589                 scrq = adapter->rx_scrq[i];
1590                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1591                 if (!scrq->irq) {
1592                         rc = -EINVAL;
1593                         dev_err(dev, "Error mapping irq\n");
1594                         goto req_rx_irq_failed;
1595                 }
1596                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1597                                  0, "ibmvnic_rx", scrq);
1598                 if (rc) {
1599                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1600                                 scrq->irq, rc);
1601                         irq_dispose_mapping(scrq->irq);
1602                         goto req_rx_irq_failed;
1603                 }
1604         }
1605         return rc;
1606
1607 req_rx_irq_failed:
1608         for (j = 0; j < i; j++) {
1609                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1610                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1611         }
1612         i = adapter->req_tx_queues;
1613 req_tx_irq_failed:
1614         for (j = 0; j < i; j++) {
1615                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1616                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1617         }
1618         release_sub_crqs(adapter);
1619         return rc;
1620 }
1621
1622 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1623 {
1624         struct device *dev = &adapter->vdev->dev;
1625         struct ibmvnic_sub_crq_queue **allqueues;
1626         int registered_queues = 0;
1627         union ibmvnic_crq crq;
1628         int total_queues;
1629         int more = 0;
1630         int i;
1631
1632         if (!retry) {
1633                 /* Sub-CRQ entries are 32 byte long */
1634                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1635
1636                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1637                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1638                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1639                         goto allqueues_failed;
1640                 }
1641
1642                 /* Get the minimum between the queried max and the entries
1643                  * that fit in our PAGE_SIZE
1644                  */
1645                 adapter->req_tx_entries_per_subcrq =
1646                     adapter->max_tx_entries_per_subcrq > entries_page ?
1647                     entries_page : adapter->max_tx_entries_per_subcrq;
1648                 adapter->req_rx_add_entries_per_subcrq =
1649                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1650                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1651
1652                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1653                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
1654                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1655
1656                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
1657         }
1658
1659         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1660
1661         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1662         if (!allqueues)
1663                 goto allqueues_failed;
1664
1665         for (i = 0; i < total_queues; i++) {
1666                 allqueues[i] = init_sub_crq_queue(adapter);
1667                 if (!allqueues[i]) {
1668                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1669                         break;
1670                 }
1671                 registered_queues++;
1672         }
1673
1674         /* Make sure we were able to register the minimum number of queues */
1675         if (registered_queues <
1676             adapter->min_tx_queues + adapter->min_rx_queues) {
1677                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1678                 goto tx_failed;
1679         }
1680
1681         /* Distribute the failed allocated queues*/
1682         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1683                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1684                 switch (i % 3) {
1685                 case 0:
1686                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1687                                 adapter->req_rx_queues--;
1688                         else
1689                                 more++;
1690                         break;
1691                 case 1:
1692                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1693                                 adapter->req_tx_queues--;
1694                         else
1695                                 more++;
1696                         break;
1697                 }
1698         }
1699
1700         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1701                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1702         if (!adapter->tx_scrq)
1703                 goto tx_failed;
1704
1705         for (i = 0; i < adapter->req_tx_queues; i++) {
1706                 adapter->tx_scrq[i] = allqueues[i];
1707                 adapter->tx_scrq[i]->pool_index = i;
1708         }
1709
1710         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1711                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1712         if (!adapter->rx_scrq)
1713                 goto rx_failed;
1714
1715         for (i = 0; i < adapter->req_rx_queues; i++) {
1716                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1717                 adapter->rx_scrq[i]->scrq_num = i;
1718         }
1719
1720         memset(&crq, 0, sizeof(crq));
1721         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1722         crq.request_capability.cmd = REQUEST_CAPABILITY;
1723
1724         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1725         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1726         atomic_inc(&adapter->running_cap_crqs);
1727         ibmvnic_send_crq(adapter, &crq);
1728
1729         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1730         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1731         atomic_inc(&adapter->running_cap_crqs);
1732         ibmvnic_send_crq(adapter, &crq);
1733
1734         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1735         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1736         atomic_inc(&adapter->running_cap_crqs);
1737         ibmvnic_send_crq(adapter, &crq);
1738
1739         crq.request_capability.capability =
1740             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1741         crq.request_capability.number =
1742             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1743         atomic_inc(&adapter->running_cap_crqs);
1744         ibmvnic_send_crq(adapter, &crq);
1745
1746         crq.request_capability.capability =
1747             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1748         crq.request_capability.number =
1749             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1750         atomic_inc(&adapter->running_cap_crqs);
1751         ibmvnic_send_crq(adapter, &crq);
1752
1753         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1754         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1755         atomic_inc(&adapter->running_cap_crqs);
1756         ibmvnic_send_crq(adapter, &crq);
1757
1758         if (adapter->netdev->flags & IFF_PROMISC) {
1759                 if (adapter->promisc_supported) {
1760                         crq.request_capability.capability =
1761                             cpu_to_be16(PROMISC_REQUESTED);
1762                         crq.request_capability.number = cpu_to_be64(1);
1763                         atomic_inc(&adapter->running_cap_crqs);
1764                         ibmvnic_send_crq(adapter, &crq);
1765                 }
1766         } else {
1767                 crq.request_capability.capability =
1768                     cpu_to_be16(PROMISC_REQUESTED);
1769                 crq.request_capability.number = cpu_to_be64(0);
1770                 atomic_inc(&adapter->running_cap_crqs);
1771                 ibmvnic_send_crq(adapter, &crq);
1772         }
1773
1774         kfree(allqueues);
1775
1776         return;
1777
1778 rx_failed:
1779         kfree(adapter->tx_scrq);
1780         adapter->tx_scrq = NULL;
1781 tx_failed:
1782         for (i = 0; i < registered_queues; i++)
1783                 release_sub_crq_queue(adapter, allqueues[i]);
1784         kfree(allqueues);
1785 allqueues_failed:
1786         ibmvnic_remove(adapter->vdev);
1787 }
1788
1789 static int pending_scrq(struct ibmvnic_adapter *adapter,
1790                         struct ibmvnic_sub_crq_queue *scrq)
1791 {
1792         union sub_crq *entry = &scrq->msgs[scrq->cur];
1793
1794         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1795                 return 1;
1796         else
1797                 return 0;
1798 }
1799
1800 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1801                                         struct ibmvnic_sub_crq_queue *scrq)
1802 {
1803         union sub_crq *entry;
1804         unsigned long flags;
1805
1806         spin_lock_irqsave(&scrq->lock, flags);
1807         entry = &scrq->msgs[scrq->cur];
1808         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1809                 if (++scrq->cur == scrq->size)
1810                         scrq->cur = 0;
1811         } else {
1812                 entry = NULL;
1813         }
1814         spin_unlock_irqrestore(&scrq->lock, flags);
1815
1816         return entry;
1817 }
1818
1819 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1820 {
1821         struct ibmvnic_crq_queue *queue = &adapter->crq;
1822         union ibmvnic_crq *crq;
1823
1824         crq = &queue->msgs[queue->cur];
1825         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1826                 if (++queue->cur == queue->size)
1827                         queue->cur = 0;
1828         } else {
1829                 crq = NULL;
1830         }
1831
1832         return crq;
1833 }
1834
1835 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1836                        union sub_crq *sub_crq)
1837 {
1838         unsigned int ua = adapter->vdev->unit_address;
1839         struct device *dev = &adapter->vdev->dev;
1840         u64 *u64_crq = (u64 *)sub_crq;
1841         int rc;
1842
1843         netdev_dbg(adapter->netdev,
1844                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1845                    (unsigned long int)cpu_to_be64(remote_handle),
1846                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1847                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1848                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1849                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1850
1851         /* Make sure the hypervisor sees the complete request */
1852         mb();
1853
1854         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1855                                 cpu_to_be64(remote_handle),
1856                                 cpu_to_be64(u64_crq[0]),
1857                                 cpu_to_be64(u64_crq[1]),
1858                                 cpu_to_be64(u64_crq[2]),
1859                                 cpu_to_be64(u64_crq[3]));
1860
1861         if (rc) {
1862                 if (rc == H_CLOSED)
1863                         dev_warn(dev, "CRQ Queue closed\n");
1864                 dev_err(dev, "Send error (rc=%d)\n", rc);
1865         }
1866
1867         return rc;
1868 }
1869
1870 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1871                                 u64 remote_handle, u64 ioba, u64 num_entries)
1872 {
1873         unsigned int ua = adapter->vdev->unit_address;
1874         struct device *dev = &adapter->vdev->dev;
1875         int rc;
1876
1877         /* Make sure the hypervisor sees the complete request */
1878         mb();
1879         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1880                                 cpu_to_be64(remote_handle),
1881                                 ioba, num_entries);
1882
1883         if (rc) {
1884                 if (rc == H_CLOSED)
1885                         dev_warn(dev, "CRQ Queue closed\n");
1886                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1887         }
1888
1889         return rc;
1890 }
1891
1892 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1893                             union ibmvnic_crq *crq)
1894 {
1895         unsigned int ua = adapter->vdev->unit_address;
1896         struct device *dev = &adapter->vdev->dev;
1897         u64 *u64_crq = (u64 *)crq;
1898         int rc;
1899
1900         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1901                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1902                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1903
1904         /* Make sure the hypervisor sees the complete request */
1905         mb();
1906
1907         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1908                                 cpu_to_be64(u64_crq[0]),
1909                                 cpu_to_be64(u64_crq[1]));
1910
1911         if (rc) {
1912                 if (rc == H_CLOSED)
1913                         dev_warn(dev, "CRQ Queue closed\n");
1914                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1915         }
1916
1917         return rc;
1918 }
1919
1920 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1921 {
1922         union ibmvnic_crq crq;
1923
1924         memset(&crq, 0, sizeof(crq));
1925         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1926         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1927         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1928
1929         return ibmvnic_send_crq(adapter, &crq);
1930 }
1931
1932 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1933 {
1934         union ibmvnic_crq crq;
1935
1936         memset(&crq, 0, sizeof(crq));
1937         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1938         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1939         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1940
1941         return ibmvnic_send_crq(adapter, &crq);
1942 }
1943
1944 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1945 {
1946         union ibmvnic_crq crq;
1947
1948         memset(&crq, 0, sizeof(crq));
1949         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1950         crq.version_exchange.cmd = VERSION_EXCHANGE;
1951         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1952
1953         return ibmvnic_send_crq(adapter, &crq);
1954 }
1955
1956 static void send_login(struct ibmvnic_adapter *adapter)
1957 {
1958         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1959         struct ibmvnic_login_buffer *login_buffer;
1960         struct ibmvnic_inflight_cmd *inflight_cmd;
1961         struct device *dev = &adapter->vdev->dev;
1962         dma_addr_t rsp_buffer_token;
1963         dma_addr_t buffer_token;
1964         size_t rsp_buffer_size;
1965         union ibmvnic_crq crq;
1966         unsigned long flags;
1967         size_t buffer_size;
1968         __be64 *tx_list_p;
1969         __be64 *rx_list_p;
1970         int i;
1971
1972         buffer_size =
1973             sizeof(struct ibmvnic_login_buffer) +
1974             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1975
1976         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1977         if (!login_buffer)
1978                 goto buf_alloc_failed;
1979
1980         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1981                                       DMA_TO_DEVICE);
1982         if (dma_mapping_error(dev, buffer_token)) {
1983                 dev_err(dev, "Couldn't map login buffer\n");
1984                 goto buf_map_failed;
1985         }
1986
1987         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1988                           sizeof(u64) * adapter->req_tx_queues +
1989                           sizeof(u64) * adapter->req_rx_queues +
1990                           sizeof(u64) * adapter->req_rx_queues +
1991                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1992
1993         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1994         if (!login_rsp_buffer)
1995                 goto buf_rsp_alloc_failed;
1996
1997         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1998                                           rsp_buffer_size, DMA_FROM_DEVICE);
1999         if (dma_mapping_error(dev, rsp_buffer_token)) {
2000                 dev_err(dev, "Couldn't map login rsp buffer\n");
2001                 goto buf_rsp_map_failed;
2002         }
2003         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2004         if (!inflight_cmd) {
2005                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
2006                 goto inflight_alloc_failed;
2007         }
2008         adapter->login_buf = login_buffer;
2009         adapter->login_buf_token = buffer_token;
2010         adapter->login_buf_sz = buffer_size;
2011         adapter->login_rsp_buf = login_rsp_buffer;
2012         adapter->login_rsp_buf_token = rsp_buffer_token;
2013         adapter->login_rsp_buf_sz = rsp_buffer_size;
2014
2015         login_buffer->len = cpu_to_be32(buffer_size);
2016         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
2017         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
2018         login_buffer->off_txcomp_subcrqs =
2019             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
2020         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
2021         login_buffer->off_rxcomp_subcrqs =
2022             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
2023                         sizeof(u64) * adapter->req_tx_queues);
2024         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
2025         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
2026
2027         tx_list_p = (__be64 *)((char *)login_buffer +
2028                                       sizeof(struct ibmvnic_login_buffer));
2029         rx_list_p = (__be64 *)((char *)login_buffer +
2030                                       sizeof(struct ibmvnic_login_buffer) +
2031                                       sizeof(u64) * adapter->req_tx_queues);
2032
2033         for (i = 0; i < adapter->req_tx_queues; i++) {
2034                 if (adapter->tx_scrq[i]) {
2035                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
2036                                                    crq_num);
2037                 }
2038         }
2039
2040         for (i = 0; i < adapter->req_rx_queues; i++) {
2041                 if (adapter->rx_scrq[i]) {
2042                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
2043                                                    crq_num);
2044                 }
2045         }
2046
2047         netdev_dbg(adapter->netdev, "Login Buffer:\n");
2048         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
2049                 netdev_dbg(adapter->netdev, "%016lx\n",
2050                            ((unsigned long int *)(adapter->login_buf))[i]);
2051         }
2052
2053         memset(&crq, 0, sizeof(crq));
2054         crq.login.first = IBMVNIC_CRQ_CMD;
2055         crq.login.cmd = LOGIN;
2056         crq.login.ioba = cpu_to_be32(buffer_token);
2057         crq.login.len = cpu_to_be32(buffer_size);
2058
2059         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2060
2061         spin_lock_irqsave(&adapter->inflight_lock, flags);
2062         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2063         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2064
2065         ibmvnic_send_crq(adapter, &crq);
2066
2067         return;
2068
2069 inflight_alloc_failed:
2070         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
2071                          DMA_FROM_DEVICE);
2072 buf_rsp_map_failed:
2073         kfree(login_rsp_buffer);
2074 buf_rsp_alloc_failed:
2075         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
2076 buf_map_failed:
2077         kfree(login_buffer);
2078 buf_alloc_failed:
2079         return;
2080 }
2081
2082 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
2083                              u32 len, u8 map_id)
2084 {
2085         union ibmvnic_crq crq;
2086
2087         memset(&crq, 0, sizeof(crq));
2088         crq.request_map.first = IBMVNIC_CRQ_CMD;
2089         crq.request_map.cmd = REQUEST_MAP;
2090         crq.request_map.map_id = map_id;
2091         crq.request_map.ioba = cpu_to_be32(addr);
2092         crq.request_map.len = cpu_to_be32(len);
2093         ibmvnic_send_crq(adapter, &crq);
2094 }
2095
2096 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
2097 {
2098         union ibmvnic_crq crq;
2099
2100         memset(&crq, 0, sizeof(crq));
2101         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
2102         crq.request_unmap.cmd = REQUEST_UNMAP;
2103         crq.request_unmap.map_id = map_id;
2104         ibmvnic_send_crq(adapter, &crq);
2105 }
2106
2107 static void send_map_query(struct ibmvnic_adapter *adapter)
2108 {
2109         union ibmvnic_crq crq;
2110
2111         memset(&crq, 0, sizeof(crq));
2112         crq.query_map.first = IBMVNIC_CRQ_CMD;
2113         crq.query_map.cmd = QUERY_MAP;
2114         ibmvnic_send_crq(adapter, &crq);
2115 }
2116
2117 /* Send a series of CRQs requesting various capabilities of the VNIC server */
2118 static void send_cap_queries(struct ibmvnic_adapter *adapter)
2119 {
2120         union ibmvnic_crq crq;
2121
2122         atomic_set(&adapter->running_cap_crqs, 0);
2123         memset(&crq, 0, sizeof(crq));
2124         crq.query_capability.first = IBMVNIC_CRQ_CMD;
2125         crq.query_capability.cmd = QUERY_CAPABILITY;
2126
2127         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
2128         atomic_inc(&adapter->running_cap_crqs);
2129         ibmvnic_send_crq(adapter, &crq);
2130
2131         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
2132         atomic_inc(&adapter->running_cap_crqs);
2133         ibmvnic_send_crq(adapter, &crq);
2134
2135         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
2136         atomic_inc(&adapter->running_cap_crqs);
2137         ibmvnic_send_crq(adapter, &crq);
2138
2139         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
2140         atomic_inc(&adapter->running_cap_crqs);
2141         ibmvnic_send_crq(adapter, &crq);
2142
2143         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
2144         atomic_inc(&adapter->running_cap_crqs);
2145         ibmvnic_send_crq(adapter, &crq);
2146
2147         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
2148         atomic_inc(&adapter->running_cap_crqs);
2149         ibmvnic_send_crq(adapter, &crq);
2150
2151         crq.query_capability.capability =
2152             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2153         atomic_inc(&adapter->running_cap_crqs);
2154         ibmvnic_send_crq(adapter, &crq);
2155
2156         crq.query_capability.capability =
2157             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2158         atomic_inc(&adapter->running_cap_crqs);
2159         ibmvnic_send_crq(adapter, &crq);
2160
2161         crq.query_capability.capability =
2162             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2163         atomic_inc(&adapter->running_cap_crqs);
2164         ibmvnic_send_crq(adapter, &crq);
2165
2166         crq.query_capability.capability =
2167             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2168         atomic_inc(&adapter->running_cap_crqs);
2169         ibmvnic_send_crq(adapter, &crq);
2170
2171         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2172         atomic_inc(&adapter->running_cap_crqs);
2173         ibmvnic_send_crq(adapter, &crq);
2174
2175         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2176         atomic_inc(&adapter->running_cap_crqs);
2177         ibmvnic_send_crq(adapter, &crq);
2178
2179         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2180         atomic_inc(&adapter->running_cap_crqs);
2181         ibmvnic_send_crq(adapter, &crq);
2182
2183         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2184         atomic_inc(&adapter->running_cap_crqs);
2185         ibmvnic_send_crq(adapter, &crq);
2186
2187         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2188         atomic_inc(&adapter->running_cap_crqs);
2189         ibmvnic_send_crq(adapter, &crq);
2190
2191         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2192         atomic_inc(&adapter->running_cap_crqs);
2193         ibmvnic_send_crq(adapter, &crq);
2194
2195         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2196         atomic_inc(&adapter->running_cap_crqs);
2197         ibmvnic_send_crq(adapter, &crq);
2198
2199         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2200         atomic_inc(&adapter->running_cap_crqs);
2201         ibmvnic_send_crq(adapter, &crq);
2202
2203         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2204         atomic_inc(&adapter->running_cap_crqs);
2205         ibmvnic_send_crq(adapter, &crq);
2206
2207         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2208         atomic_inc(&adapter->running_cap_crqs);
2209         ibmvnic_send_crq(adapter, &crq);
2210
2211         crq.query_capability.capability =
2212                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2213         atomic_inc(&adapter->running_cap_crqs);
2214         ibmvnic_send_crq(adapter, &crq);
2215
2216         crq.query_capability.capability =
2217                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2218         atomic_inc(&adapter->running_cap_crqs);
2219         ibmvnic_send_crq(adapter, &crq);
2220
2221         crq.query_capability.capability =
2222                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2223         atomic_inc(&adapter->running_cap_crqs);
2224         ibmvnic_send_crq(adapter, &crq);
2225
2226         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2227         atomic_inc(&adapter->running_cap_crqs);
2228         ibmvnic_send_crq(adapter, &crq);
2229 }
2230
2231 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2232 {
2233         struct device *dev = &adapter->vdev->dev;
2234         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2235         union ibmvnic_crq crq;
2236         int i;
2237
2238         dma_unmap_single(dev, adapter->ip_offload_tok,
2239                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2240
2241         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2242         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2243                 netdev_dbg(adapter->netdev, "%016lx\n",
2244                            ((unsigned long int *)(buf))[i]);
2245
2246         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2247         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2248         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2249                    buf->tcp_ipv4_chksum);
2250         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2251                    buf->tcp_ipv6_chksum);
2252         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2253                    buf->udp_ipv4_chksum);
2254         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2255                    buf->udp_ipv6_chksum);
2256         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2257                    buf->large_tx_ipv4);
2258         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2259                    buf->large_tx_ipv6);
2260         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2261                    buf->large_rx_ipv4);
2262         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2263                    buf->large_rx_ipv6);
2264         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2265                    buf->max_ipv4_header_size);
2266         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2267                    buf->max_ipv6_header_size);
2268         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2269                    buf->max_tcp_header_size);
2270         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2271                    buf->max_udp_header_size);
2272         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2273                    buf->max_large_tx_size);
2274         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2275                    buf->max_large_rx_size);
2276         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2277                    buf->ipv6_extension_header);
2278         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2279                    buf->tcp_pseudosum_req);
2280         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2281                    buf->num_ipv6_ext_headers);
2282         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2283                    buf->off_ipv6_ext_headers);
2284
2285         adapter->ip_offload_ctrl_tok =
2286             dma_map_single(dev, &adapter->ip_offload_ctrl,
2287                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2288
2289         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2290                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2291                 return;
2292         }
2293
2294         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2295         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2296         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2297         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2298         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2299
2300         /* large_tx/rx disabled for now, additional features needed */
2301         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2302         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2303         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2304         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2305
2306         adapter->netdev->features = NETIF_F_GSO;
2307
2308         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2309                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2310
2311         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2312                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2313
2314         if ((adapter->netdev->features &
2315             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2316                 adapter->netdev->features |= NETIF_F_RXCSUM;
2317
2318         memset(&crq, 0, sizeof(crq));
2319         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2320         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2321         crq.control_ip_offload.len =
2322             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2323         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2324         ibmvnic_send_crq(adapter, &crq);
2325 }
2326
2327 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2328                                   struct ibmvnic_adapter *adapter)
2329 {
2330         struct device *dev = &adapter->vdev->dev;
2331         struct ibmvnic_error_buff *error_buff, *tmp;
2332         unsigned long flags;
2333         bool found = false;
2334         int i;
2335
2336         if (!crq->request_error_rsp.rc.code) {
2337                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2338                          crq->request_error_rsp.rc.code);
2339                 return;
2340         }
2341
2342         spin_lock_irqsave(&adapter->error_list_lock, flags);
2343         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2344                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2345                         found = true;
2346                         list_del(&error_buff->list);
2347                         break;
2348                 }
2349         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2350
2351         if (!found) {
2352                 dev_err(dev, "Couldn't find error id %x\n",
2353                         be32_to_cpu(crq->request_error_rsp.error_id));
2354                 return;
2355         }
2356
2357         dev_err(dev, "Detailed info for error id %x:",
2358                 be32_to_cpu(crq->request_error_rsp.error_id));
2359
2360         for (i = 0; i < error_buff->len; i++) {
2361                 pr_cont("%02x", (int)error_buff->buff[i]);
2362                 if (i % 8 == 7)
2363                         pr_cont(" ");
2364         }
2365         pr_cont("\n");
2366
2367         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2368                          DMA_FROM_DEVICE);
2369         kfree(error_buff->buff);
2370         kfree(error_buff);
2371 }
2372
2373 static void handle_error_indication(union ibmvnic_crq *crq,
2374                                     struct ibmvnic_adapter *adapter)
2375 {
2376         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2377         struct ibmvnic_inflight_cmd *inflight_cmd;
2378         struct device *dev = &adapter->vdev->dev;
2379         struct ibmvnic_error_buff *error_buff;
2380         union ibmvnic_crq new_crq;
2381         unsigned long flags;
2382
2383         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2384                 crq->error_indication.
2385                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2386                 be32_to_cpu(crq->error_indication.error_id),
2387                 be16_to_cpu(crq->error_indication.error_cause));
2388
2389         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2390         if (!error_buff)
2391                 return;
2392
2393         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2394         if (!error_buff->buff) {
2395                 kfree(error_buff);
2396                 return;
2397         }
2398
2399         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2400                                          DMA_FROM_DEVICE);
2401         if (dma_mapping_error(dev, error_buff->dma)) {
2402                 if (!firmware_has_feature(FW_FEATURE_CMO))
2403                         dev_err(dev, "Couldn't map error buffer\n");
2404                 kfree(error_buff->buff);
2405                 kfree(error_buff);
2406                 return;
2407         }
2408
2409         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2410         if (!inflight_cmd) {
2411                 dma_unmap_single(dev, error_buff->dma, detail_len,
2412                                  DMA_FROM_DEVICE);
2413                 kfree(error_buff->buff);
2414                 kfree(error_buff);
2415                 return;
2416         }
2417
2418         error_buff->len = detail_len;
2419         error_buff->error_id = crq->error_indication.error_id;
2420
2421         spin_lock_irqsave(&adapter->error_list_lock, flags);
2422         list_add_tail(&error_buff->list, &adapter->errors);
2423         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2424
2425         memset(&new_crq, 0, sizeof(new_crq));
2426         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2427         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2428         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2429         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2430         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2431
2432         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2433
2434         spin_lock_irqsave(&adapter->inflight_lock, flags);
2435         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2436         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2437
2438         ibmvnic_send_crq(adapter, &new_crq);
2439 }
2440
2441 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2442                                   struct ibmvnic_adapter *adapter)
2443 {
2444         struct net_device *netdev = adapter->netdev;
2445         struct device *dev = &adapter->vdev->dev;
2446         long rc;
2447
2448         rc = crq->change_mac_addr_rsp.rc.code;
2449         if (rc) {
2450                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2451                 return;
2452         }
2453         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2454                ETH_ALEN);
2455 }
2456
2457 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2458                                    struct ibmvnic_adapter *adapter)
2459 {
2460         struct device *dev = &adapter->vdev->dev;
2461         u64 *req_value;
2462         char *name;
2463
2464         atomic_dec(&adapter->running_cap_crqs);
2465         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2466         case REQ_TX_QUEUES:
2467                 req_value = &adapter->req_tx_queues;
2468                 name = "tx";
2469                 break;
2470         case REQ_RX_QUEUES:
2471                 req_value = &adapter->req_rx_queues;
2472                 name = "rx";
2473                 break;
2474         case REQ_RX_ADD_QUEUES:
2475                 req_value = &adapter->req_rx_add_queues;
2476                 name = "rx_add";
2477                 break;
2478         case REQ_TX_ENTRIES_PER_SUBCRQ:
2479                 req_value = &adapter->req_tx_entries_per_subcrq;
2480                 name = "tx_entries_per_subcrq";
2481                 break;
2482         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2483                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2484                 name = "rx_add_entries_per_subcrq";
2485                 break;
2486         case REQ_MTU:
2487                 req_value = &adapter->req_mtu;
2488                 name = "mtu";
2489                 break;
2490         case PROMISC_REQUESTED:
2491                 req_value = &adapter->promisc;
2492                 name = "promisc";
2493                 break;
2494         default:
2495                 dev_err(dev, "Got invalid cap request rsp %d\n",
2496                         crq->request_capability.capability);
2497                 return;
2498         }
2499
2500         switch (crq->request_capability_rsp.rc.code) {
2501         case SUCCESS:
2502                 break;
2503         case PARTIALSUCCESS:
2504                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2505                          *req_value,
2506                          (long int)be64_to_cpu(crq->request_capability_rsp.
2507                                                number), name);
2508                 release_sub_crqs(adapter);
2509                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2510                 init_sub_crqs(adapter, 1);
2511                 return;
2512         default:
2513                 dev_err(dev, "Error %d in request cap rsp\n",
2514                         crq->request_capability_rsp.rc.code);
2515                 return;
2516         }
2517
2518         /* Done receiving requested capabilities, query IP offload support */
2519         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2520                 union ibmvnic_crq newcrq;
2521                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2522                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2523                     &adapter->ip_offload_buf;
2524
2525                 adapter->wait_capability = false;
2526                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2527                                                          buf_sz,
2528                                                          DMA_FROM_DEVICE);
2529
2530                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2531                         if (!firmware_has_feature(FW_FEATURE_CMO))
2532                                 dev_err(dev, "Couldn't map offload buffer\n");
2533                         return;
2534                 }
2535
2536                 memset(&newcrq, 0, sizeof(newcrq));
2537                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2538                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2539                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2540                 newcrq.query_ip_offload.ioba =
2541                     cpu_to_be32(adapter->ip_offload_tok);
2542
2543                 ibmvnic_send_crq(adapter, &newcrq);
2544         }
2545 }
2546
2547 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2548                             struct ibmvnic_adapter *adapter)
2549 {
2550         struct device *dev = &adapter->vdev->dev;
2551         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2552         struct ibmvnic_login_buffer *login = adapter->login_buf;
2553         int i;
2554
2555         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2556                          DMA_BIDIRECTIONAL);
2557         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2558                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2559
2560         /* If the number of queues requested can't be allocated by the
2561          * server, the login response will return with code 1. We will need
2562          * to resend the login buffer with fewer queues requested.
2563          */
2564         if (login_rsp_crq->generic.rc.code) {
2565                 adapter->renegotiate = true;
2566                 complete(&adapter->init_done);
2567                 return 0;
2568         }
2569
2570         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2571         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2572                 netdev_dbg(adapter->netdev, "%016lx\n",
2573                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2574         }
2575
2576         /* Sanity checks */
2577         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2578             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2579              adapter->req_rx_add_queues !=
2580              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2581                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2582                 ibmvnic_remove(adapter->vdev);
2583                 return -EIO;
2584         }
2585         complete(&adapter->init_done);
2586
2587         return 0;
2588 }
2589
2590 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2591                                    struct ibmvnic_adapter *adapter)
2592 {
2593         struct device *dev = &adapter->vdev->dev;
2594         u8 map_id = crq->request_map_rsp.map_id;
2595         int tx_subcrqs;
2596         int rx_subcrqs;
2597         long rc;
2598         int i;
2599
2600         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2601         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2602
2603         rc = crq->request_map_rsp.rc.code;
2604         if (rc) {
2605                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2606                 adapter->map_id--;
2607                 /* need to find and zero tx/rx_pool map_id */
2608                 for (i = 0; i < tx_subcrqs; i++) {
2609                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2610                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2611                 }
2612                 for (i = 0; i < rx_subcrqs; i++) {
2613                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2614                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2615                 }
2616         }
2617         complete(&adapter->fw_done);
2618 }
2619
2620 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2621                                      struct ibmvnic_adapter *adapter)
2622 {
2623         struct device *dev = &adapter->vdev->dev;
2624         long rc;
2625
2626         rc = crq->request_unmap_rsp.rc.code;
2627         if (rc)
2628                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2629 }
2630
2631 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2632                                  struct ibmvnic_adapter *adapter)
2633 {
2634         struct net_device *netdev = adapter->netdev;
2635         struct device *dev = &adapter->vdev->dev;
2636         long rc;
2637
2638         rc = crq->query_map_rsp.rc.code;
2639         if (rc) {
2640                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2641                 return;
2642         }
2643         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2644                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2645                    crq->query_map_rsp.free_pages);
2646 }
2647
2648 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2649                                  struct ibmvnic_adapter *adapter)
2650 {
2651         struct net_device *netdev = adapter->netdev;
2652         struct device *dev = &adapter->vdev->dev;
2653         long rc;
2654
2655         atomic_dec(&adapter->running_cap_crqs);
2656         netdev_dbg(netdev, "Outstanding queries: %d\n",
2657                    atomic_read(&adapter->running_cap_crqs));
2658         rc = crq->query_capability.rc.code;
2659         if (rc) {
2660                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2661                 goto out;
2662         }
2663
2664         switch (be16_to_cpu(crq->query_capability.capability)) {
2665         case MIN_TX_QUEUES:
2666                 adapter->min_tx_queues =
2667                     be64_to_cpu(crq->query_capability.number);
2668                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2669                            adapter->min_tx_queues);
2670                 break;
2671         case MIN_RX_QUEUES:
2672                 adapter->min_rx_queues =
2673                     be64_to_cpu(crq->query_capability.number);
2674                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2675                            adapter->min_rx_queues);
2676                 break;
2677         case MIN_RX_ADD_QUEUES:
2678                 adapter->min_rx_add_queues =
2679                     be64_to_cpu(crq->query_capability.number);
2680                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2681                            adapter->min_rx_add_queues);
2682                 break;
2683         case MAX_TX_QUEUES:
2684                 adapter->max_tx_queues =
2685                     be64_to_cpu(crq->query_capability.number);
2686                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2687                            adapter->max_tx_queues);
2688                 break;
2689         case MAX_RX_QUEUES:
2690                 adapter->max_rx_queues =
2691                     be64_to_cpu(crq->query_capability.number);
2692                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2693                            adapter->max_rx_queues);
2694                 break;
2695         case MAX_RX_ADD_QUEUES:
2696                 adapter->max_rx_add_queues =
2697                     be64_to_cpu(crq->query_capability.number);
2698                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2699                            adapter->max_rx_add_queues);
2700                 break;
2701         case MIN_TX_ENTRIES_PER_SUBCRQ:
2702                 adapter->min_tx_entries_per_subcrq =
2703                     be64_to_cpu(crq->query_capability.number);
2704                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2705                            adapter->min_tx_entries_per_subcrq);
2706                 break;
2707         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2708                 adapter->min_rx_add_entries_per_subcrq =
2709                     be64_to_cpu(crq->query_capability.number);
2710                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2711                            adapter->min_rx_add_entries_per_subcrq);
2712                 break;
2713         case MAX_TX_ENTRIES_PER_SUBCRQ:
2714                 adapter->max_tx_entries_per_subcrq =
2715                     be64_to_cpu(crq->query_capability.number);
2716                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2717                            adapter->max_tx_entries_per_subcrq);
2718                 break;
2719         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2720                 adapter->max_rx_add_entries_per_subcrq =
2721                     be64_to_cpu(crq->query_capability.number);
2722                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2723                            adapter->max_rx_add_entries_per_subcrq);
2724                 break;
2725         case TCP_IP_OFFLOAD:
2726                 adapter->tcp_ip_offload =
2727                     be64_to_cpu(crq->query_capability.number);
2728                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2729                            adapter->tcp_ip_offload);
2730                 break;
2731         case PROMISC_SUPPORTED:
2732                 adapter->promisc_supported =
2733                     be64_to_cpu(crq->query_capability.number);
2734                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2735                            adapter->promisc_supported);
2736                 break;
2737         case MIN_MTU:
2738                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2739                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
2740                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2741                 break;
2742         case MAX_MTU:
2743                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2744                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
2745                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2746                 break;
2747         case MAX_MULTICAST_FILTERS:
2748                 adapter->max_multicast_filters =
2749                     be64_to_cpu(crq->query_capability.number);
2750                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2751                            adapter->max_multicast_filters);
2752                 break;
2753         case VLAN_HEADER_INSERTION:
2754                 adapter->vlan_header_insertion =
2755                     be64_to_cpu(crq->query_capability.number);
2756                 if (adapter->vlan_header_insertion)
2757                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2758                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2759                            adapter->vlan_header_insertion);
2760                 break;
2761         case MAX_TX_SG_ENTRIES:
2762                 adapter->max_tx_sg_entries =
2763                     be64_to_cpu(crq->query_capability.number);
2764                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2765                            adapter->max_tx_sg_entries);
2766                 break;
2767         case RX_SG_SUPPORTED:
2768                 adapter->rx_sg_supported =
2769                     be64_to_cpu(crq->query_capability.number);
2770                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2771                            adapter->rx_sg_supported);
2772                 break;
2773         case OPT_TX_COMP_SUB_QUEUES:
2774                 adapter->opt_tx_comp_sub_queues =
2775                     be64_to_cpu(crq->query_capability.number);
2776                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2777                            adapter->opt_tx_comp_sub_queues);
2778                 break;
2779         case OPT_RX_COMP_QUEUES:
2780                 adapter->opt_rx_comp_queues =
2781                     be64_to_cpu(crq->query_capability.number);
2782                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2783                            adapter->opt_rx_comp_queues);
2784                 break;
2785         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2786                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2787                     be64_to_cpu(crq->query_capability.number);
2788                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2789                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2790                 break;
2791         case OPT_TX_ENTRIES_PER_SUBCRQ:
2792                 adapter->opt_tx_entries_per_subcrq =
2793                     be64_to_cpu(crq->query_capability.number);
2794                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2795                            adapter->opt_tx_entries_per_subcrq);
2796                 break;
2797         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2798                 adapter->opt_rxba_entries_per_subcrq =
2799                     be64_to_cpu(crq->query_capability.number);
2800                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2801                            adapter->opt_rxba_entries_per_subcrq);
2802                 break;
2803         case TX_RX_DESC_REQ:
2804                 adapter->tx_rx_desc_req = crq->query_capability.number;
2805                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2806                            adapter->tx_rx_desc_req);
2807                 break;
2808
2809         default:
2810                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2811                            crq->query_capability.capability);
2812         }
2813
2814 out:
2815         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2816                 adapter->wait_capability = false;
2817                 init_sub_crqs(adapter, 0);
2818                 /* We're done querying the capabilities, initialize sub-crqs */
2819         }
2820 }
2821
2822 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
2823 {
2824         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
2825         struct device *dev = &adapter->vdev->dev;
2826         struct ibmvnic_error_buff *error_buff, *tmp2;
2827         unsigned long flags;
2828         unsigned long flags2;
2829
2830         spin_lock_irqsave(&adapter->inflight_lock, flags);
2831         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
2832                 switch (inflight_cmd->crq.generic.cmd) {
2833                 case LOGIN:
2834                         dma_unmap_single(dev, adapter->login_buf_token,
2835                                          adapter->login_buf_sz,
2836                                          DMA_BIDIRECTIONAL);
2837                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2838                                          adapter->login_rsp_buf_sz,
2839                                          DMA_BIDIRECTIONAL);
2840                         kfree(adapter->login_rsp_buf);
2841                         kfree(adapter->login_buf);
2842                         break;
2843                 case REQUEST_ERROR_INFO:
2844                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
2845                         list_for_each_entry_safe(error_buff, tmp2,
2846                                                  &adapter->errors, list) {
2847                                 dma_unmap_single(dev, error_buff->dma,
2848                                                  error_buff->len,
2849                                                  DMA_FROM_DEVICE);
2850                                 kfree(error_buff->buff);
2851                                 list_del(&error_buff->list);
2852                                 kfree(error_buff);
2853                         }
2854                         spin_unlock_irqrestore(&adapter->error_list_lock,
2855                                                flags2);
2856                         break;
2857                 }
2858                 list_del(&inflight_cmd->list);
2859                 kfree(inflight_cmd);
2860         }
2861         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2862 }
2863
2864 static void ibmvnic_xport_event(struct work_struct *work)
2865 {
2866         struct ibmvnic_adapter *adapter = container_of(work,
2867                                                        struct ibmvnic_adapter,
2868                                                        ibmvnic_xport);
2869         struct device *dev = &adapter->vdev->dev;
2870         long rc;
2871
2872         ibmvnic_free_inflight(adapter);
2873         release_sub_crqs(adapter);
2874         if (adapter->migrated) {
2875                 rc = ibmvnic_reenable_crq_queue(adapter);
2876                 if (rc)
2877                         dev_err(dev, "Error after enable rc=%ld\n", rc);
2878                 adapter->migrated = false;
2879                 rc = ibmvnic_send_crq_init(adapter);
2880                 if (rc)
2881                         dev_err(dev, "Error sending init rc=%ld\n", rc);
2882         }
2883 }
2884
2885 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
2886                                struct ibmvnic_adapter *adapter)
2887 {
2888         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
2889         struct net_device *netdev = adapter->netdev;
2890         struct device *dev = &adapter->vdev->dev;
2891         u64 *u64_crq = (u64 *)crq;
2892         long rc;
2893
2894         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
2895                    (unsigned long int)cpu_to_be64(u64_crq[0]),
2896                    (unsigned long int)cpu_to_be64(u64_crq[1]));
2897         switch (gen_crq->first) {
2898         case IBMVNIC_CRQ_INIT_RSP:
2899                 switch (gen_crq->cmd) {
2900                 case IBMVNIC_CRQ_INIT:
2901                         dev_info(dev, "Partner initialized\n");
2902                         /* Send back a response */
2903                         rc = ibmvnic_send_crq_init_complete(adapter);
2904                         if (!rc)
2905                                 schedule_work(&adapter->vnic_crq_init);
2906                         else
2907                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
2908                         break;
2909                 case IBMVNIC_CRQ_INIT_COMPLETE:
2910                         dev_info(dev, "Partner initialization complete\n");
2911                         send_version_xchg(adapter);
2912                         break;
2913                 default:
2914                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
2915                 }
2916                 return;
2917         case IBMVNIC_CRQ_XPORT_EVENT:
2918                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
2919                         dev_info(dev, "Re-enabling adapter\n");
2920                         adapter->migrated = true;
2921                         schedule_work(&adapter->ibmvnic_xport);
2922                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
2923                         dev_info(dev, "Backing device failover detected\n");
2924                         netif_carrier_off(netdev);
2925                         adapter->failover = true;
2926                 } else {
2927                         /* The adapter lost the connection */
2928                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
2929                                 gen_crq->cmd);
2930                         schedule_work(&adapter->ibmvnic_xport);
2931                 }
2932                 return;
2933         case IBMVNIC_CRQ_CMD_RSP:
2934                 break;
2935         default:
2936                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
2937                         gen_crq->first);
2938                 return;
2939         }
2940
2941         switch (gen_crq->cmd) {
2942         case VERSION_EXCHANGE_RSP:
2943                 rc = crq->version_exchange_rsp.rc.code;
2944                 if (rc) {
2945                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
2946                         break;
2947                 }
2948                 dev_info(dev, "Partner protocol version is %d\n",
2949                          crq->version_exchange_rsp.version);
2950                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
2951                     ibmvnic_version)
2952                         ibmvnic_version =
2953                             be16_to_cpu(crq->version_exchange_rsp.version);
2954                 send_cap_queries(adapter);
2955                 break;
2956         case QUERY_CAPABILITY_RSP:
2957                 handle_query_cap_rsp(crq, adapter);
2958                 break;
2959         case QUERY_MAP_RSP:
2960                 handle_query_map_rsp(crq, adapter);
2961                 break;
2962         case REQUEST_MAP_RSP:
2963                 handle_request_map_rsp(crq, adapter);
2964                 break;
2965         case REQUEST_UNMAP_RSP:
2966                 handle_request_unmap_rsp(crq, adapter);
2967                 break;
2968         case REQUEST_CAPABILITY_RSP:
2969                 handle_request_cap_rsp(crq, adapter);
2970                 break;
2971         case LOGIN_RSP:
2972                 netdev_dbg(netdev, "Got Login Response\n");
2973                 handle_login_rsp(crq, adapter);
2974                 break;
2975         case LOGICAL_LINK_STATE_RSP:
2976                 netdev_dbg(netdev, "Got Logical Link State Response\n");
2977                 adapter->logical_link_state =
2978                     crq->logical_link_state_rsp.link_state;
2979                 break;
2980         case LINK_STATE_INDICATION:
2981                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
2982                 adapter->phys_link_state =
2983                     crq->link_state_indication.phys_link_state;
2984                 adapter->logical_link_state =
2985                     crq->link_state_indication.logical_link_state;
2986                 break;
2987         case CHANGE_MAC_ADDR_RSP:
2988                 netdev_dbg(netdev, "Got MAC address change Response\n");
2989                 handle_change_mac_rsp(crq, adapter);
2990                 break;
2991         case ERROR_INDICATION:
2992                 netdev_dbg(netdev, "Got Error Indication\n");
2993                 handle_error_indication(crq, adapter);
2994                 break;
2995         case REQUEST_ERROR_RSP:
2996                 netdev_dbg(netdev, "Got Error Detail Response\n");
2997                 handle_error_info_rsp(crq, adapter);
2998                 break;
2999         case REQUEST_STATISTICS_RSP:
3000                 netdev_dbg(netdev, "Got Statistics Response\n");
3001                 complete(&adapter->stats_done);
3002                 break;
3003         case QUERY_IP_OFFLOAD_RSP:
3004                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3005                 handle_query_ip_offload_rsp(adapter);
3006                 break;
3007         case MULTICAST_CTRL_RSP:
3008                 netdev_dbg(netdev, "Got multicast control Response\n");
3009                 break;
3010         case CONTROL_IP_OFFLOAD_RSP:
3011                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3012                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3013                                  sizeof(adapter->ip_offload_ctrl),
3014                                  DMA_TO_DEVICE);
3015                 complete(&adapter->init_done);
3016                 break;
3017         case COLLECT_FW_TRACE_RSP:
3018                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3019                 complete(&adapter->fw_done);
3020                 break;
3021         default:
3022                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3023                            gen_crq->cmd);
3024         }
3025 }
3026
3027 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3028 {
3029         struct ibmvnic_adapter *adapter = instance;
3030         unsigned long flags;
3031
3032         spin_lock_irqsave(&adapter->crq.lock, flags);
3033         vio_disable_interrupts(adapter->vdev);
3034         tasklet_schedule(&adapter->tasklet);
3035         spin_unlock_irqrestore(&adapter->crq.lock, flags);
3036         return IRQ_HANDLED;
3037 }
3038
3039 static void ibmvnic_tasklet(void *data)
3040 {
3041         struct ibmvnic_adapter *adapter = data;
3042         struct ibmvnic_crq_queue *queue = &adapter->crq;
3043         struct vio_dev *vdev = adapter->vdev;
3044         union ibmvnic_crq *crq;
3045         unsigned long flags;
3046         bool done = false;
3047
3048         spin_lock_irqsave(&queue->lock, flags);
3049         vio_disable_interrupts(vdev);
3050         while (!done) {
3051                 /* Pull all the valid messages off the CRQ */
3052                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3053                         ibmvnic_handle_crq(crq, adapter);
3054                         crq->generic.first = 0;
3055                 }
3056                 vio_enable_interrupts(vdev);
3057                 crq = ibmvnic_next_crq(adapter);
3058                 if (crq) {
3059                         vio_disable_interrupts(vdev);
3060                         ibmvnic_handle_crq(crq, adapter);
3061                         crq->generic.first = 0;
3062                 } else {
3063                         /* remain in tasklet until all
3064                          * capabilities responses are received
3065                          */
3066                         if (!adapter->wait_capability)
3067                                 done = true;
3068                 }
3069         }
3070         /* if capabilities CRQ's were sent in this tasklet, the following
3071          * tasklet must wait until all responses are received
3072          */
3073         if (atomic_read(&adapter->running_cap_crqs) != 0)
3074                 adapter->wait_capability = true;
3075         spin_unlock_irqrestore(&queue->lock, flags);
3076 }
3077
3078 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3079 {
3080         struct vio_dev *vdev = adapter->vdev;
3081         int rc;
3082
3083         do {
3084                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3085         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3086
3087         if (rc)
3088                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3089
3090         return rc;
3091 }
3092
3093 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3094 {
3095         struct ibmvnic_crq_queue *crq = &adapter->crq;
3096         struct device *dev = &adapter->vdev->dev;
3097         struct vio_dev *vdev = adapter->vdev;
3098         int rc;
3099
3100         /* Close the CRQ */
3101         do {
3102                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3103         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3104
3105         /* Clean out the queue */
3106         memset(crq->msgs, 0, PAGE_SIZE);
3107         crq->cur = 0;
3108
3109         /* And re-open it again */
3110         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3111                                 crq->msg_token, PAGE_SIZE);
3112
3113         if (rc == H_CLOSED)
3114                 /* Adapter is good, but other end is not ready */
3115                 dev_warn(dev, "Partner adapter not ready\n");
3116         else if (rc != 0)
3117                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3118
3119         return rc;
3120 }
3121
3122 static void release_crq_queue(struct ibmvnic_adapter *adapter)
3123 {
3124         struct ibmvnic_crq_queue *crq = &adapter->crq;
3125         struct vio_dev *vdev = adapter->vdev;
3126         long rc;
3127
3128         if (!crq->msgs)
3129                 return;
3130
3131         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3132         free_irq(vdev->irq, adapter);
3133         tasklet_kill(&adapter->tasklet);
3134         do {
3135                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3136         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3137
3138         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3139                          DMA_BIDIRECTIONAL);
3140         free_page((unsigned long)crq->msgs);
3141         crq->msgs = NULL;
3142 }
3143
3144 static int init_crq_queue(struct ibmvnic_adapter *adapter)
3145 {
3146         struct ibmvnic_crq_queue *crq = &adapter->crq;
3147         struct device *dev = &adapter->vdev->dev;
3148         struct vio_dev *vdev = adapter->vdev;
3149         int rc, retrc = -ENOMEM;
3150
3151         if (crq->msgs)
3152                 return 0;
3153
3154         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3155         /* Should we allocate more than one page? */
3156
3157         if (!crq->msgs)
3158                 return -ENOMEM;
3159
3160         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3161         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3162                                         DMA_BIDIRECTIONAL);
3163         if (dma_mapping_error(dev, crq->msg_token))
3164                 goto map_failed;
3165
3166         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3167                                 crq->msg_token, PAGE_SIZE);
3168
3169         if (rc == H_RESOURCE)
3170                 /* maybe kexecing and resource is busy. try a reset */
3171                 rc = ibmvnic_reset_crq(adapter);
3172         retrc = rc;
3173
3174         if (rc == H_CLOSED) {
3175                 dev_warn(dev, "Partner adapter not ready\n");
3176         } else if (rc) {
3177                 dev_warn(dev, "Error %d opening adapter\n", rc);
3178                 goto reg_crq_failed;
3179         }
3180
3181         retrc = 0;
3182
3183         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3184                      (unsigned long)adapter);
3185
3186         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3187         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3188                          adapter);
3189         if (rc) {
3190                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3191                         vdev->irq, rc);
3192                 goto req_irq_failed;
3193         }
3194
3195         rc = vio_enable_interrupts(vdev);
3196         if (rc) {
3197                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3198                 goto req_irq_failed;
3199         }
3200
3201         crq->cur = 0;
3202         spin_lock_init(&crq->lock);
3203
3204         return retrc;
3205
3206 req_irq_failed:
3207         tasklet_kill(&adapter->tasklet);
3208         do {
3209                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3210         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3211 reg_crq_failed:
3212         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3213 map_failed:
3214         free_page((unsigned long)crq->msgs);
3215         crq->msgs = NULL;
3216         return retrc;
3217 }
3218
3219 static void handle_crq_init_rsp(struct work_struct *work)
3220 {
3221         struct ibmvnic_adapter *adapter = container_of(work,
3222                                                        struct ibmvnic_adapter,
3223                                                        vnic_crq_init);
3224         struct device *dev = &adapter->vdev->dev;
3225         struct net_device *netdev = adapter->netdev;
3226         unsigned long timeout = msecs_to_jiffies(30000);
3227         bool restart = false;
3228         int rc;
3229
3230         if (adapter->failover) {
3231                 release_sub_crqs(adapter);
3232                 if (netif_running(netdev)) {
3233                         netif_tx_disable(netdev);
3234                         ibmvnic_close(netdev);
3235                         restart = true;
3236                 }
3237         }
3238
3239         reinit_completion(&adapter->init_done);
3240         send_version_xchg(adapter);
3241         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3242                 dev_err(dev, "Passive init timeout\n");
3243                 goto task_failed;
3244         }
3245
3246         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3247
3248         if (adapter->failover) {
3249                 adapter->failover = false;
3250                 if (restart) {
3251                         rc = ibmvnic_open(netdev);
3252                         if (rc)
3253                                 goto restart_failed;
3254                 }
3255                 netif_carrier_on(netdev);
3256                 return;
3257         }
3258
3259         rc = register_netdev(netdev);
3260         if (rc) {
3261                 dev_err(dev,
3262                         "failed to register netdev rc=%d\n", rc);
3263                 goto register_failed;
3264         }
3265         dev_info(dev, "ibmvnic registered\n");
3266
3267         return;
3268
3269 restart_failed:
3270         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3271 register_failed:
3272         release_sub_crqs(adapter);
3273 task_failed:
3274         dev_err(dev, "Passive initialization was not successful\n");
3275 }
3276
3277 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
3278 {
3279         struct device *dev = &adapter->vdev->dev;
3280         unsigned long timeout = msecs_to_jiffies(30000);
3281         int rc;
3282
3283         rc = init_crq_queue(adapter);
3284         if (rc) {
3285                 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
3286                 return rc;
3287         }
3288
3289         rc = init_stats_token(adapter);
3290         if (rc) {
3291                 release_crq_queue(adapter);
3292                 return rc;
3293         }
3294
3295         init_completion(&adapter->init_done);
3296         ibmvnic_send_crq_init(adapter);
3297         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3298                 dev_err(dev, "Initialization sequence timed out\n");
3299                 release_crq_queue(adapter);
3300                 return -1;
3301         }
3302
3303         return 0;
3304 }
3305
3306 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3307 {
3308         struct ibmvnic_adapter *adapter;
3309         struct net_device *netdev;
3310         unsigned char *mac_addr_p;
3311         int rc;
3312
3313         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3314                 dev->unit_address);
3315
3316         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3317                                                         VETH_MAC_ADDR, NULL);
3318         if (!mac_addr_p) {
3319                 dev_err(&dev->dev,
3320                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3321                         __FILE__, __LINE__);
3322                 return 0;
3323         }
3324
3325         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3326                                    IBMVNIC_MAX_TX_QUEUES);
3327         if (!netdev)
3328                 return -ENOMEM;
3329
3330         adapter = netdev_priv(netdev);
3331         dev_set_drvdata(&dev->dev, netdev);
3332         adapter->vdev = dev;
3333         adapter->netdev = netdev;
3334         adapter->failover = false;
3335
3336         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3337         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3338         netdev->irq = dev->irq;
3339         netdev->netdev_ops = &ibmvnic_netdev_ops;
3340         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3341         SET_NETDEV_DEV(netdev, &dev->dev);
3342
3343         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3344         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3345
3346         spin_lock_init(&adapter->stats_lock);
3347
3348         INIT_LIST_HEAD(&adapter->errors);
3349         INIT_LIST_HEAD(&adapter->inflight);
3350         spin_lock_init(&adapter->error_list_lock);
3351         spin_lock_init(&adapter->inflight_lock);
3352
3353         rc = ibmvnic_init(adapter);
3354         if (rc) {
3355                 free_netdev(netdev);
3356                 return rc;
3357         }
3358
3359         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3360         adapter->is_closed = false;
3361
3362         rc = register_netdev(netdev);
3363         if (rc) {
3364                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3365                 free_netdev(netdev);
3366                 return rc;
3367         }
3368         dev_info(&dev->dev, "ibmvnic registered\n");
3369
3370         return 0;
3371 }
3372
3373 static int ibmvnic_remove(struct vio_dev *dev)
3374 {
3375         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3376
3377         unregister_netdev(netdev);
3378         free_netdev(netdev);
3379         dev_set_drvdata(&dev->dev, NULL);
3380
3381         return 0;
3382 }
3383
3384 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3385 {
3386         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3387         struct ibmvnic_adapter *adapter;
3388         struct iommu_table *tbl;
3389         unsigned long ret = 0;
3390         int i;
3391
3392         tbl = get_iommu_table_base(&vdev->dev);
3393
3394         /* netdev inits at probe time along with the structures we need below*/
3395         if (!netdev)
3396                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3397
3398         adapter = netdev_priv(netdev);
3399
3400         ret += PAGE_SIZE; /* the crq message queue */
3401         ret += adapter->bounce_buffer_size;
3402         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3403
3404         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3405                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3406
3407         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3408              i++)
3409                 ret += adapter->rx_pool[i].size *
3410                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3411
3412         return ret;
3413 }
3414
3415 static int ibmvnic_resume(struct device *dev)
3416 {
3417         struct net_device *netdev = dev_get_drvdata(dev);
3418         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3419         int i;
3420
3421         /* kick the interrupt handlers just in case we lost an interrupt */
3422         for (i = 0; i < adapter->req_rx_queues; i++)
3423                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3424                                      adapter->rx_scrq[i]);
3425
3426         return 0;
3427 }
3428
3429 static struct vio_device_id ibmvnic_device_table[] = {
3430         {"network", "IBM,vnic"},
3431         {"", "" }
3432 };
3433 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3434
3435 static const struct dev_pm_ops ibmvnic_pm_ops = {
3436         .resume = ibmvnic_resume
3437 };
3438
3439 static struct vio_driver ibmvnic_driver = {
3440         .id_table       = ibmvnic_device_table,
3441         .probe          = ibmvnic_probe,
3442         .remove         = ibmvnic_remove,
3443         .get_desired_dma = ibmvnic_get_desired_dma,
3444         .name           = ibmvnic_driver_name,
3445         .pm             = &ibmvnic_pm_ops,
3446 };
3447
3448 /* module functions */
3449 static int __init ibmvnic_module_init(void)
3450 {
3451         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3452                 IBMVNIC_DRIVER_VERSION);
3453
3454         return vio_register_driver(&ibmvnic_driver);
3455 }
3456
3457 static void __exit ibmvnic_module_exit(void)
3458 {
3459         vio_unregister_driver(&ibmvnic_driver);
3460 }
3461
3462 module_init(ibmvnic_module_init);
3463 module_exit(ibmvnic_module_exit);