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/debugfs.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/seq_file.h>
  78 #include <linux/workqueue.h>
  79
  80 #include "ibmvnic.h"
  81
  82 static const char ibmvnic_driver_name[] = "ibmvnic";
  83 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  84
  85 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  86 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  87 MODULE_LICENSE("GPL");
  88 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  89
  90 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  91 static int ibmvnic_remove(struct vio_dev *);
  92 static void release_sub_crqs(struct ibmvnic_adapter *);
  93 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
  94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  99                        union sub_crq *sub_crq);
 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 102 static int enable_scrq_irq(struct ibmvnic_adapter *,
 103                            struct ibmvnic_sub_crq_queue *);
 104 static int disable_scrq_irq(struct ibmvnic_adapter *,
 105                             struct ibmvnic_sub_crq_queue *);
 106 static int pending_scrq(struct ibmvnic_adapter *,
 107                         struct ibmvnic_sub_crq_queue *);
 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 109                                         struct ibmvnic_sub_crq_queue *);
 110 static int ibmvnic_poll(struct napi_struct *napi, int data);
 111 static void send_map_query(struct ibmvnic_adapter *adapter);
 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 114
 115 struct ibmvnic_stat {
 116         char name[ETH_GSTRING_LEN];
 117         int offset;
 118 };
 119
 120 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 121                              offsetof(struct ibmvnic_statistics, stat))
 122 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 123
 124 static const struct ibmvnic_stat ibmvnic_stats[] = {
 125         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 126         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 127         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 128         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 129         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 130         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 131         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 132         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 133         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 134         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 135         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 136         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 137         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 138         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 139         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 140         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 141         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 142         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 143         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 144         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 145         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 146         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 147 };
 148
 149 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 150                           unsigned long length, unsigned long *number,
 151                           unsigned long *irq)
 152 {
 153         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 154         long rc;
 155
 156         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 157         *number = retbuf[0];
 158         *irq = retbuf[1];
 159
 160         return rc;
 161 }
 162
 163 /* net_device_ops functions */
 164
 165 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 166                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 167                          int buff_size, int active)
 168 {
 169         netdev_dbg(adapter->netdev,
 170                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 171                    index, num, buff_size);
 172         rx_pool->size = num;
 173         rx_pool->index = index;
 174         rx_pool->buff_size = buff_size;
 175         rx_pool->active = active;
 176 }
 177
 178 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 179                                 struct ibmvnic_long_term_buff *ltb, int size)
 180 {
 181         struct device *dev = &adapter->vdev->dev;
 182
 183         ltb->size = size;
 184         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 185                                        GFP_KERNEL);
 186
 187         if (!ltb->buff) {
 188                 dev_err(dev, "Couldn't alloc long term buffer\n");
 189                 return -ENOMEM;
 190         }
 191         ltb->map_id = adapter->map_id;
 192         adapter->map_id++;
 193         send_request_map(adapter, ltb->addr,
 194                          ltb->size, ltb->map_id);
 195         init_completion(&adapter->fw_done);
 196         wait_for_completion(&adapter->fw_done);
 197         return 0;
 198 }
 199
 200 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 201                                 struct ibmvnic_long_term_buff *ltb)
 202 {
 203         struct device *dev = &adapter->vdev->dev;
 204
 205         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 206         if (!adapter->failover)
 207                 send_request_unmap(adapter, ltb->map_id);
 208 }
 209
 210 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
 211                          struct ibmvnic_rx_pool *pool)
 212 {
 213         struct device *dev = &adapter->vdev->dev;
 214         int i;
 215
 216         pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
 217         if (!pool->free_map)
 218                 return -ENOMEM;
 219
 220         pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
 221                                 GFP_KERNEL);
 222
 223         if (!pool->rx_buff) {
 224                 dev_err(dev, "Couldn't alloc rx buffers\n");
 225                 kfree(pool->free_map);
 226                 return -ENOMEM;
 227         }
 228
 229         if (alloc_long_term_buff(adapter, &pool->long_term_buff,
 230                                  pool->size * pool->buff_size)) {
 231                 kfree(pool->free_map);
 232                 kfree(pool->rx_buff);
 233                 return -ENOMEM;
 234         }
 235
 236         for (i = 0; i < pool->size; ++i)
 237                 pool->free_map[i] = i;
 238
 239         atomic_set(&pool->available, 0);
 240         pool->next_alloc = 0;
 241         pool->next_free = 0;
 242
 243         return 0;
 244 }
 245
 246 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 247                               struct ibmvnic_rx_pool *pool)
 248 {
 249         int count = pool->size - atomic_read(&pool->available);
 250         struct device *dev = &adapter->vdev->dev;
 251         int buffers_added = 0;
 252         unsigned long lpar_rc;
 253         union sub_crq sub_crq;
 254         struct sk_buff *skb;
 255         unsigned int offset;
 256         dma_addr_t dma_addr;
 257         unsigned char *dst;
 258         u64 *handle_array;
 259         int shift = 0;
 260         int index;
 261         int i;
 262
 263         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 264                                       be32_to_cpu(adapter->login_rsp_buf->
 265                                       off_rxadd_subcrqs));
 266
 267         for (i = 0; i < count; ++i) {
 268                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 269                 if (!skb) {
 270                         dev_err(dev, "Couldn't replenish rx buff\n");
 271                         adapter->replenish_no_mem++;
 272                         break;
 273                 }
 274
 275                 index = pool->free_map[pool->next_free];
 276
 277                 if (pool->rx_buff[index].skb)
 278                         dev_err(dev, "Inconsistent free_map!\n");
 279
 280                 /* Copy the skb to the long term mapped DMA buffer */
 281                 offset = index * pool->buff_size;
 282                 dst = pool->long_term_buff.buff + offset;
 283                 memset(dst, 0, pool->buff_size);
 284                 dma_addr = pool->long_term_buff.addr + offset;
 285                 pool->rx_buff[index].data = dst;
 286
 287                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 288                 pool->rx_buff[index].dma = dma_addr;
 289                 pool->rx_buff[index].skb = skb;
 290                 pool->rx_buff[index].pool_index = pool->index;
 291                 pool->rx_buff[index].size = pool->buff_size;
 292
 293                 memset(&sub_crq, 0, sizeof(sub_crq));
 294                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 295                 sub_crq.rx_add.correlator =
 296                     cpu_to_be64((u64)&pool->rx_buff[index]);
 297                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 298                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 299
 300                 /* The length field of the sCRQ is defined to be 24 bits so the
 301                  * buffer size needs to be left shifted by a byte before it is
 302                  * converted to big endian to prevent the last byte from being
 303                  * truncated.
 304                  */
 305 #ifdef __LITTLE_ENDIAN__
 306                 shift = 8;
 307 #endif
 308                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 309
 310                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 311                                       &sub_crq);
 312                 if (lpar_rc != H_SUCCESS)
 313                         goto failure;
 314
 315                 buffers_added++;
 316                 adapter->replenish_add_buff_success++;
 317                 pool->next_free = (pool->next_free + 1) % pool->size;
 318         }
 319         atomic_add(buffers_added, &pool->available);
 320         return;
 321
 322 failure:
 323         dev_info(dev, "replenish pools failure\n");
 324         pool->free_map[pool->next_free] = index;
 325         pool->rx_buff[index].skb = NULL;
 326         if (!dma_mapping_error(dev, dma_addr))
 327                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 328                                  DMA_FROM_DEVICE);
 329
 330         dev_kfree_skb_any(skb);
 331         adapter->replenish_add_buff_failure++;
 332         atomic_add(buffers_added, &pool->available);
 333 }
 334
 335 static void replenish_pools(struct ibmvnic_adapter *adapter)
 336 {
 337         int i;
 338
 339         if (adapter->migrated)
 340                 return;
 341
 342         adapter->replenish_task_cycles++;
 343         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 344              i++) {
 345                 if (adapter->rx_pool[i].active)
 346                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 347         }
 348 }
 349
 350 static void free_rx_pool(struct ibmvnic_adapter *adapter,
 351                          struct ibmvnic_rx_pool *pool)
 352 {
 353         int i;
 354
 355         kfree(pool->free_map);
 356         pool->free_map = NULL;
 357
 358         if (!pool->rx_buff)
 359                 return;
 360
 361         for (i = 0; i < pool->size; i++) {
 362                 if (pool->rx_buff[i].skb) {
 363                         dev_kfree_skb_any(pool->rx_buff[i].skb);
 364                         pool->rx_buff[i].skb = NULL;
 365                 }
 366         }
 367         kfree(pool->rx_buff);
 368         pool->rx_buff = NULL;
 369 }
 370
 371 static int ibmvnic_open(struct net_device *netdev)
 372 {
 373         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 374         struct device *dev = &adapter->vdev->dev;
 375         struct ibmvnic_tx_pool *tx_pool;
 376         union ibmvnic_crq crq;
 377         int rxadd_subcrqs;
 378         u64 *size_array;
 379         int tx_subcrqs;
 380         int i, j;
 381
 382         rxadd_subcrqs =
 383             be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 384         tx_subcrqs =
 385             be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 386         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 387                                   be32_to_cpu(adapter->login_rsp_buf->
 388                                               off_rxadd_buff_size));
 389         adapter->map_id = 1;
 390         adapter->napi = kcalloc(adapter->req_rx_queues,
 391                                 sizeof(struct napi_struct), GFP_KERNEL);
 392         if (!adapter->napi)
 393                 goto alloc_napi_failed;
 394         for (i = 0; i < adapter->req_rx_queues; i++) {
 395                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 396                                NAPI_POLL_WEIGHT);
 397                 napi_enable(&adapter->napi[i]);
 398         }
 399         adapter->rx_pool =
 400             kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
 401
 402         if (!adapter->rx_pool)
 403                 goto rx_pool_arr_alloc_failed;
 404         send_map_query(adapter);
 405         for (i = 0; i < rxadd_subcrqs; i++) {
 406                 init_rx_pool(adapter, &adapter->rx_pool[i],
 407                              IBMVNIC_BUFFS_PER_POOL, i,
 408                              be64_to_cpu(size_array[i]), 1);
 409                 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
 410                         dev_err(dev, "Couldn't alloc rx pool\n");
 411                         goto rx_pool_alloc_failed;
 412                 }
 413         }
 414         adapter->tx_pool =
 415             kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 416
 417         if (!adapter->tx_pool)
 418                 goto tx_pool_arr_alloc_failed;
 419         for (i = 0; i < tx_subcrqs; i++) {
 420                 tx_pool = &adapter->tx_pool[i];
 421                 tx_pool->tx_buff =
 422                     kcalloc(adapter->max_tx_entries_per_subcrq,
 423                             sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
 424                 if (!tx_pool->tx_buff)
 425                         goto tx_pool_alloc_failed;
 426
 427                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 428                                          adapter->max_tx_entries_per_subcrq *
 429                                          adapter->req_mtu))
 430                         goto tx_ltb_alloc_failed;
 431
 432                 tx_pool->free_map =
 433                     kcalloc(adapter->max_tx_entries_per_subcrq,
 434                             sizeof(int), GFP_KERNEL);
 435                 if (!tx_pool->free_map)
 436                         goto tx_fm_alloc_failed;
 437
 438                 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
 439                         tx_pool->free_map[j] = j;
 440
 441                 tx_pool->consumer_index = 0;
 442                 tx_pool->producer_index = 0;
 443         }
 444         adapter->bounce_buffer_size =
 445             (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
 446         adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
 447                                          GFP_KERNEL);
 448         if (!adapter->bounce_buffer)
 449                 goto bounce_alloc_failed;
 450
 451         adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
 452                                                     adapter->bounce_buffer_size,
 453                                                     DMA_TO_DEVICE);
 454         if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 455                 dev_err(dev, "Couldn't map tx bounce buffer\n");
 456                 goto bounce_map_failed;
 457         }
 458         replenish_pools(adapter);
 459
 460         /* We're ready to receive frames, enable the sub-crq interrupts and
 461          * set the logical link state to up
 462          */
 463         for (i = 0; i < adapter->req_rx_queues; i++)
 464                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 465
 466         for (i = 0; i < adapter->req_tx_queues; i++)
 467                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 468
 469         memset(&crq, 0, sizeof(crq));
 470         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 471         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 472         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
 473         ibmvnic_send_crq(adapter, &crq);
 474
 475         netif_tx_start_all_queues(netdev);
 476
 477         return 0;
 478
 479 bounce_map_failed:
 480         kfree(adapter->bounce_buffer);
 481 bounce_alloc_failed:
 482         i = tx_subcrqs - 1;
 483         kfree(adapter->tx_pool[i].free_map);
 484 tx_fm_alloc_failed:
 485         free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
 486 tx_ltb_alloc_failed:
 487         kfree(adapter->tx_pool[i].tx_buff);
 488 tx_pool_alloc_failed:
 489         for (j = 0; j < i; j++) {
 490                 kfree(adapter->tx_pool[j].tx_buff);
 491                 free_long_term_buff(adapter,
 492                                     &adapter->tx_pool[j].long_term_buff);
 493                 kfree(adapter->tx_pool[j].free_map);
 494         }
 495         kfree(adapter->tx_pool);
 496         adapter->tx_pool = NULL;
 497 tx_pool_arr_alloc_failed:
 498         i = rxadd_subcrqs;
 499 rx_pool_alloc_failed:
 500         for (j = 0; j < i; j++) {
 501                 free_rx_pool(adapter, &adapter->rx_pool[j]);
 502                 free_long_term_buff(adapter,
 503                                     &adapter->rx_pool[j].long_term_buff);
 504         }
 505         kfree(adapter->rx_pool);
 506         adapter->rx_pool = NULL;
 507 rx_pool_arr_alloc_failed:
 508         for (i = 0; i < adapter->req_rx_queues; i++)
 509                 napi_enable(&adapter->napi[i]);
 510 alloc_napi_failed:
 511         return -ENOMEM;
 512 }
 513
 514 static int ibmvnic_close(struct net_device *netdev)
 515 {
 516         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 517         struct device *dev = &adapter->vdev->dev;
 518         union ibmvnic_crq crq;
 519         int i;
 520
 521         adapter->closing = true;
 522
 523         for (i = 0; i < adapter->req_rx_queues; i++)
 524                 napi_disable(&adapter->napi[i]);
 525
 526         if (!adapter->failover)
 527                 netif_tx_stop_all_queues(netdev);
 528
 529         if (adapter->bounce_buffer) {
 530                 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 531                         dma_unmap_single(&adapter->vdev->dev,
 532                                          adapter->bounce_buffer_dma,
 533                                          adapter->bounce_buffer_size,
 534                                          DMA_BIDIRECTIONAL);
 535                         adapter->bounce_buffer_dma = DMA_ERROR_CODE;
 536                 }
 537                 kfree(adapter->bounce_buffer);
 538                 adapter->bounce_buffer = NULL;
 539         }
 540
 541         memset(&crq, 0, sizeof(crq));
 542         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 543         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 544         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
 545         ibmvnic_send_crq(adapter, &crq);
 546
 547         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 548              i++) {
 549                 kfree(adapter->tx_pool[i].tx_buff);
 550                 free_long_term_buff(adapter,
 551                                     &adapter->tx_pool[i].long_term_buff);
 552                 kfree(adapter->tx_pool[i].free_map);
 553         }
 554         kfree(adapter->tx_pool);
 555         adapter->tx_pool = NULL;
 556
 557         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 558              i++) {
 559                 free_rx_pool(adapter, &adapter->rx_pool[i]);
 560                 free_long_term_buff(adapter,
 561                                     &adapter->rx_pool[i].long_term_buff);
 562         }
 563         kfree(adapter->rx_pool);
 564         adapter->rx_pool = NULL;
 565
 566         adapter->closing = false;
 567
 568         return 0;
 569 }
 570
 571 /**
 572  * build_hdr_data - creates L2/L3/L4 header data buffer
 573  * @hdr_field - bitfield determining needed headers
 574  * @skb - socket buffer
 575  * @hdr_len - array of header lengths
 576  * @tot_len - total length of data
 577  *
 578  * Reads hdr_field to determine which headers are needed by firmware.
 579  * Builds a buffer containing these headers.  Saves individual header
 580  * lengths and total buffer length to be used to build descriptors.
 581  */
 582 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 583                           int *hdr_len, u8 *hdr_data)
 584 {
 585         int len = 0;
 586         u8 *hdr;
 587
 588         hdr_len[0] = sizeof(struct ethhdr);
 589
 590         if (skb->protocol == htons(ETH_P_IP)) {
 591                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 592                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 593                         hdr_len[2] = tcp_hdrlen(skb);
 594                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 595                         hdr_len[2] = sizeof(struct udphdr);
 596         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 597                 hdr_len[1] = sizeof(struct ipv6hdr);
 598                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 599                         hdr_len[2] = tcp_hdrlen(skb);
 600                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 601                         hdr_len[2] = sizeof(struct udphdr);
 602         }
 603
 604         memset(hdr_data, 0, 120);
 605         if ((hdr_field >> 6) & 1) {
 606                 hdr = skb_mac_header(skb);
 607                 memcpy(hdr_data, hdr, hdr_len[0]);
 608                 len += hdr_len[0];
 609         }
 610
 611         if ((hdr_field >> 5) & 1) {
 612                 hdr = skb_network_header(skb);
 613                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 614                 len += hdr_len[1];
 615         }
 616
 617         if ((hdr_field >> 4) & 1) {
 618                 hdr = skb_transport_header(skb);
 619                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 620                 len += hdr_len[2];
 621         }
 622         return len;
 623 }
 624
 625 /**
 626  * create_hdr_descs - create header and header extension descriptors
 627  * @hdr_field - bitfield determining needed headers
 628  * @data - buffer containing header data
 629  * @len - length of data buffer
 630  * @hdr_len - array of individual header lengths
 631  * @scrq_arr - descriptor array
 632  *
 633  * Creates header and, if needed, header extension descriptors and
 634  * places them in a descriptor array, scrq_arr
 635  */
 636
 637 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 638                              union sub_crq *scrq_arr)
 639 {
 640         union sub_crq hdr_desc;
 641         int tmp_len = len;
 642         u8 *data, *cur;
 643         int tmp;
 644
 645         while (tmp_len > 0) {
 646                 cur = hdr_data + len - tmp_len;
 647
 648                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 649                 if (cur != hdr_data) {
 650                         data = hdr_desc.hdr_ext.data;
 651                         tmp = tmp_len > 29 ? 29 : tmp_len;
 652                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 653                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 654                         hdr_desc.hdr_ext.len = tmp;
 655                 } else {
 656                         data = hdr_desc.hdr.data;
 657                         tmp = tmp_len > 24 ? 24 : tmp_len;
 658                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 659                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 660                         hdr_desc.hdr.len = tmp;
 661                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 662                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 663                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 664                         hdr_desc.hdr.flag = hdr_field << 1;
 665                 }
 666                 memcpy(data, cur, tmp);
 667                 tmp_len -= tmp;
 668                 *scrq_arr = hdr_desc;
 669                 scrq_arr++;
 670         }
 671 }
 672
 673 /**
 674  * build_hdr_descs_arr - build a header descriptor array
 675  * @skb - socket buffer
 676  * @num_entries - number of descriptors to be sent
 677  * @subcrq - first TX descriptor
 678  * @hdr_field - bit field determining which headers will be sent
 679  *
 680  * This function will build a TX descriptor array with applicable
 681  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 682  */
 683
 684 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 685                                 int *num_entries, u8 hdr_field)
 686 {
 687         int hdr_len[3] = {0, 0, 0};
 688         int tot_len, len;
 689         u8 *hdr_data = txbuff->hdr_data;
 690
 691         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 692                                  txbuff->hdr_data);
 693         len = tot_len;
 694         len -= 24;
 695         if (len > 0)
 696                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 697         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 698                          txbuff->indir_arr + 1);
 699 }
 700
 701 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 702 {
 703         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 704         int queue_num = skb_get_queue_mapping(skb);
 705         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 706         struct device *dev = &adapter->vdev->dev;
 707         struct ibmvnic_tx_buff *tx_buff = NULL;
 708         struct ibmvnic_tx_pool *tx_pool;
 709         unsigned int tx_send_failed = 0;
 710         unsigned int tx_map_failed = 0;
 711         unsigned int tx_dropped = 0;
 712         unsigned int tx_packets = 0;
 713         unsigned int tx_bytes = 0;
 714         dma_addr_t data_dma_addr;
 715         struct netdev_queue *txq;
 716         bool used_bounce = false;
 717         unsigned long lpar_rc;
 718         union sub_crq tx_crq;
 719         unsigned int offset;
 720         int num_entries = 1;
 721         unsigned char *dst;
 722         u64 *handle_array;
 723         int index = 0;
 724         int ret = 0;
 725
 726         tx_pool = &adapter->tx_pool[queue_num];
 727         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 728         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 729                                    be32_to_cpu(adapter->login_rsp_buf->
 730                                                off_txsubm_subcrqs));
 731         if (adapter->migrated) {
 732                 tx_send_failed++;
 733                 tx_dropped++;
 734                 ret = NETDEV_TX_BUSY;
 735                 goto out;
 736         }
 737
 738         index = tx_pool->free_map[tx_pool->consumer_index];
 739         offset = index * adapter->req_mtu;
 740         dst = tx_pool->long_term_buff.buff + offset;
 741         memset(dst, 0, adapter->req_mtu);
 742         skb_copy_from_linear_data(skb, dst, skb->len);
 743         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 744
 745         tx_pool->consumer_index =
 746             (tx_pool->consumer_index + 1) %
 747                 adapter->max_tx_entries_per_subcrq;
 748
 749         tx_buff = &tx_pool->tx_buff[index];
 750         tx_buff->skb = skb;
 751         tx_buff->data_dma[0] = data_dma_addr;
 752         tx_buff->data_len[0] = skb->len;
 753         tx_buff->index = index;
 754         tx_buff->pool_index = queue_num;
 755         tx_buff->last_frag = true;
 756         tx_buff->used_bounce = used_bounce;
 757
 758         memset(&tx_crq, 0, sizeof(tx_crq));
 759         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 760         tx_crq.v1.type = IBMVNIC_TX_DESC;
 761         tx_crq.v1.n_crq_elem = 1;
 762         tx_crq.v1.n_sge = 1;
 763         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 764         tx_crq.v1.correlator = cpu_to_be32(index);
 765         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 766         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 767         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 768
 769         if (adapter->vlan_header_insertion) {
 770                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 771                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 772         }
 773
 774         if (skb->protocol == htons(ETH_P_IP)) {
 775                 if (ip_hdr(skb)->version == 4)
 776                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 777                 else if (ip_hdr(skb)->version == 6)
 778                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 779
 780                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 781                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 782                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 783                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 784         }
 785
 786         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 787                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 788                 hdrs += 2;
 789         }
 790         /* determine if l2/3/4 headers are sent to firmware */
 791         if ((*hdrs >> 7) & 1 &&
 792             (skb->protocol == htons(ETH_P_IP) ||
 793              skb->protocol == htons(ETH_P_IPV6))) {
 794                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 795                 tx_crq.v1.n_crq_elem = num_entries;
 796                 tx_buff->indir_arr[0] = tx_crq;
 797                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 798                                                     sizeof(tx_buff->indir_arr),
 799                                                     DMA_TO_DEVICE);
 800                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 801                         if (!firmware_has_feature(FW_FEATURE_CMO))
 802                                 dev_err(dev, "tx: unable to map descriptor array\n");
 803                         tx_map_failed++;
 804                         tx_dropped++;
 805                         ret = NETDEV_TX_BUSY;
 806                         goto out;
 807                 }
 808                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 809                                                (u64)tx_buff->indir_dma,
 810                                                (u64)num_entries);
 811         } else {
 812                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 813                                       &tx_crq);
 814         }
 815         if (lpar_rc != H_SUCCESS) {
 816                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 817
 818                 if (tx_pool->consumer_index == 0)
 819                         tx_pool->consumer_index =
 820                                 adapter->max_tx_entries_per_subcrq - 1;
 821                 else
 822                         tx_pool->consumer_index--;
 823
 824                 tx_send_failed++;
 825                 tx_dropped++;
 826                 ret = NETDEV_TX_BUSY;
 827                 goto out;
 828         }
 829         tx_packets++;
 830         tx_bytes += skb->len;
 831         txq->trans_start = jiffies;
 832         ret = NETDEV_TX_OK;
 833
 834 out:
 835         netdev->stats.tx_dropped += tx_dropped;
 836         netdev->stats.tx_bytes += tx_bytes;
 837         netdev->stats.tx_packets += tx_packets;
 838         adapter->tx_send_failed += tx_send_failed;
 839         adapter->tx_map_failed += tx_map_failed;
 840
 841         return ret;
 842 }
 843
 844 static void ibmvnic_set_multi(struct net_device *netdev)
 845 {
 846         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 847         struct netdev_hw_addr *ha;
 848         union ibmvnic_crq crq;
 849
 850         memset(&crq, 0, sizeof(crq));
 851         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 852         crq.request_capability.cmd = REQUEST_CAPABILITY;
 853
 854         if (netdev->flags & IFF_PROMISC) {
 855                 if (!adapter->promisc_supported)
 856                         return;
 857         } else {
 858                 if (netdev->flags & IFF_ALLMULTI) {
 859                         /* Accept all multicast */
 860                         memset(&crq, 0, sizeof(crq));
 861                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 862                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 863                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 864                         ibmvnic_send_crq(adapter, &crq);
 865                 } else if (netdev_mc_empty(netdev)) {
 866                         /* Reject all multicast */
 867                         memset(&crq, 0, sizeof(crq));
 868                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 869                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 870                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 871                         ibmvnic_send_crq(adapter, &crq);
 872                 } else {
 873                         /* Accept one or more multicast(s) */
 874                         netdev_for_each_mc_addr(ha, netdev) {
 875                                 memset(&crq, 0, sizeof(crq));
 876                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 877                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 878                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 879                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 880                                                 ha->addr);
 881                                 ibmvnic_send_crq(adapter, &crq);
 882                         }
 883                 }
 884         }
 885 }
 886
 887 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 888 {
 889         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 890         struct sockaddr *addr = p;
 891         union ibmvnic_crq crq;
 892
 893         if (!is_valid_ether_addr(addr->sa_data))
 894                 return -EADDRNOTAVAIL;
 895
 896         memset(&crq, 0, sizeof(crq));
 897         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 898         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 899         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 900         ibmvnic_send_crq(adapter, &crq);
 901         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 902         return 0;
 903 }
 904
 905 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
 906 {
 907         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 908
 909         if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
 910                 return -EINVAL;
 911
 912         netdev->mtu = new_mtu;
 913         return 0;
 914 }
 915
 916 static void ibmvnic_tx_timeout(struct net_device *dev)
 917 {
 918         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 919         int rc;
 920
 921         /* Adapter timed out, resetting it */
 922         release_sub_crqs(adapter);
 923         rc = ibmvnic_reset_crq(adapter);
 924         if (rc)
 925                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 926         else
 927                 ibmvnic_send_crq_init(adapter);
 928 }
 929
 930 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 931                                   struct ibmvnic_rx_buff *rx_buff)
 932 {
 933         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 934
 935         rx_buff->skb = NULL;
 936
 937         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 938         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 939
 940         atomic_dec(&pool->available);
 941 }
 942
 943 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 944 {
 945         struct net_device *netdev = napi->dev;
 946         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 947         int scrq_num = (int)(napi - adapter->napi);
 948         int frames_processed = 0;
 949 restart_poll:
 950         while (frames_processed < budget) {
 951                 struct sk_buff *skb;
 952                 struct ibmvnic_rx_buff *rx_buff;
 953                 union sub_crq *next;
 954                 u32 length;
 955                 u16 offset;
 956                 u8 flags = 0;
 957
 958                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 959                         break;
 960                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 961                 rx_buff =
 962                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 963                                                           rx_comp.correlator);
 964                 /* do error checking */
 965                 if (next->rx_comp.rc) {
 966                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 967                         /* free the entry */
 968                         next->rx_comp.first = 0;
 969                         remove_buff_from_pool(adapter, rx_buff);
 970                         break;
 971                 }
 972
 973                 length = be32_to_cpu(next->rx_comp.len);
 974                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 975                 flags = next->rx_comp.flags;
 976                 skb = rx_buff->skb;
 977                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 978                                         length);
 979                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 980                 /* free the entry */
 981                 next->rx_comp.first = 0;
 982                 remove_buff_from_pool(adapter, rx_buff);
 983
 984                 skb_put(skb, length);
 985                 skb->protocol = eth_type_trans(skb, netdev);
 986
 987                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 988                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 989                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 990                 }
 991
 992                 length = skb->len;
 993                 napi_gro_receive(napi, skb); /* send it up */
 994                 netdev->stats.rx_packets++;
 995                 netdev->stats.rx_bytes += length;
 996                 frames_processed++;
 997         }
 998         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 999
1000         if (frames_processed < budget) {
1001                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1002                 napi_complete(napi);
1003                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1004                     napi_reschedule(napi)) {
1005                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1006                         goto restart_poll;
1007                 }
1008         }
1009         return frames_processed;
1010 }
1011
1012 #ifdef CONFIG_NET_POLL_CONTROLLER
1013 static void ibmvnic_netpoll_controller(struct net_device *dev)
1014 {
1015         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1016         int i;
1017
1018         replenish_pools(netdev_priv(dev));
1019         for (i = 0; i < adapter->req_rx_queues; i++)
1020                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1021                                      adapter->rx_scrq[i]);
1022 }
1023 #endif
1024
1025 static const struct net_device_ops ibmvnic_netdev_ops = {
1026         .ndo_open               = ibmvnic_open,
1027         .ndo_stop               = ibmvnic_close,
1028         .ndo_start_xmit         = ibmvnic_xmit,
1029         .ndo_set_rx_mode        = ibmvnic_set_multi,
1030         .ndo_set_mac_address    = ibmvnic_set_mac,
1031         .ndo_validate_addr      = eth_validate_addr,
1032         .ndo_change_mtu         = ibmvnic_change_mtu,
1033         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1034 #ifdef CONFIG_NET_POLL_CONTROLLER
1035         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1036 #endif
1037 };
1038
1039 /* ethtool functions */
1040
1041 static int ibmvnic_get_settings(struct net_device *netdev,
1042                                 struct ethtool_cmd *cmd)
1043 {
1044         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1045                           SUPPORTED_FIBRE);
1046         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1047                             ADVERTISED_FIBRE);
1048         ethtool_cmd_speed_set(cmd, SPEED_1000);
1049         cmd->duplex = DUPLEX_FULL;
1050         cmd->port = PORT_FIBRE;
1051         cmd->phy_address = 0;
1052         cmd->transceiver = XCVR_INTERNAL;
1053         cmd->autoneg = AUTONEG_ENABLE;
1054         cmd->maxtxpkt = 0;
1055         cmd->maxrxpkt = 1;
1056         return 0;
1057 }
1058
1059 static void ibmvnic_get_drvinfo(struct net_device *dev,
1060                                 struct ethtool_drvinfo *info)
1061 {
1062         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1063         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1064 }
1065
1066 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1067 {
1068         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1069
1070         return adapter->msg_enable;
1071 }
1072
1073 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1074 {
1075         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1076
1077         adapter->msg_enable = data;
1078 }
1079
1080 static u32 ibmvnic_get_link(struct net_device *netdev)
1081 {
1082         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1083
1084         /* Don't need to send a query because we request a logical link up at
1085          * init and then we wait for link state indications
1086          */
1087         return adapter->logical_link_state;
1088 }
1089
1090 static void ibmvnic_get_ringparam(struct net_device *netdev,
1091                                   struct ethtool_ringparam *ring)
1092 {
1093         ring->rx_max_pending = 0;
1094         ring->tx_max_pending = 0;
1095         ring->rx_mini_max_pending = 0;
1096         ring->rx_jumbo_max_pending = 0;
1097         ring->rx_pending = 0;
1098         ring->tx_pending = 0;
1099         ring->rx_mini_pending = 0;
1100         ring->rx_jumbo_pending = 0;
1101 }
1102
1103 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1104 {
1105         int i;
1106
1107         if (stringset != ETH_SS_STATS)
1108                 return;
1109
1110         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1111                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1112 }
1113
1114 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1115 {
1116         switch (sset) {
1117         case ETH_SS_STATS:
1118                 return ARRAY_SIZE(ibmvnic_stats);
1119         default:
1120                 return -EOPNOTSUPP;
1121         }
1122 }
1123
1124 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1125                                       struct ethtool_stats *stats, u64 *data)
1126 {
1127         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1128         union ibmvnic_crq crq;
1129         int i;
1130
1131         memset(&crq, 0, sizeof(crq));
1132         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1133         crq.request_statistics.cmd = REQUEST_STATISTICS;
1134         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1135         crq.request_statistics.len =
1136             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1137         ibmvnic_send_crq(adapter, &crq);
1138
1139         /* Wait for data to be written */
1140         init_completion(&adapter->stats_done);
1141         wait_for_completion(&adapter->stats_done);
1142
1143         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1144                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1145 }
1146
1147 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1148         .get_settings           = ibmvnic_get_settings,
1149         .get_drvinfo            = ibmvnic_get_drvinfo,
1150         .get_msglevel           = ibmvnic_get_msglevel,
1151         .set_msglevel           = ibmvnic_set_msglevel,
1152         .get_link               = ibmvnic_get_link,
1153         .get_ringparam          = ibmvnic_get_ringparam,
1154         .get_strings            = ibmvnic_get_strings,
1155         .get_sset_count         = ibmvnic_get_sset_count,
1156         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1157 };
1158
1159 /* Routines for managing CRQs/sCRQs  */
1160
1161 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1162                                   struct ibmvnic_sub_crq_queue *scrq)
1163 {
1164         struct device *dev = &adapter->vdev->dev;
1165         long rc;
1166
1167         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1168
1169         /* Close the sub-crqs */
1170         do {
1171                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1172                                         adapter->vdev->unit_address,
1173                                         scrq->crq_num);
1174         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1175
1176         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1177                          DMA_BIDIRECTIONAL);
1178         free_pages((unsigned long)scrq->msgs, 2);
1179         kfree(scrq);
1180 }
1181
1182 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1183                                                         *adapter)
1184 {
1185         struct device *dev = &adapter->vdev->dev;
1186         struct ibmvnic_sub_crq_queue *scrq;
1187         int rc;
1188
1189         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1190         if (!scrq)
1191                 return NULL;
1192
1193         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1194         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1195         if (!scrq->msgs) {
1196                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1197                 goto zero_page_failed;
1198         }
1199
1200         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1201                                          DMA_BIDIRECTIONAL);
1202         if (dma_mapping_error(dev, scrq->msg_token)) {
1203                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1204                 goto map_failed;
1205         }
1206
1207         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1208                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1209
1210         if (rc == H_RESOURCE)
1211                 rc = ibmvnic_reset_crq(adapter);
1212
1213         if (rc == H_CLOSED) {
1214                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1215         } else if (rc) {
1216                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1217                 goto reg_failed;
1218         }
1219
1220         scrq->adapter = adapter;
1221         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1222         scrq->cur = 0;
1223         scrq->rx_skb_top = NULL;
1224         spin_lock_init(&scrq->lock);
1225
1226         netdev_dbg(adapter->netdev,
1227                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1228                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1229
1230         return scrq;
1231
1232 reg_failed:
1233         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1234                          DMA_BIDIRECTIONAL);
1235 map_failed:
1236         free_pages((unsigned long)scrq->msgs, 2);
1237 zero_page_failed:
1238         kfree(scrq);
1239
1240         return NULL;
1241 }
1242
1243 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1244 {
1245         int i;
1246
1247         if (adapter->tx_scrq) {
1248                 for (i = 0; i < adapter->req_tx_queues; i++)
1249                         if (adapter->tx_scrq[i]) {
1250                                 free_irq(adapter->tx_scrq[i]->irq,
1251                                          adapter->tx_scrq[i]);
1252                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1253                                 release_sub_crq_queue(adapter,
1254                                                       adapter->tx_scrq[i]);
1255                         }
1256                 adapter->tx_scrq = NULL;
1257         }
1258
1259         if (adapter->rx_scrq) {
1260                 for (i = 0; i < adapter->req_rx_queues; i++)
1261                         if (adapter->rx_scrq[i]) {
1262                                 free_irq(adapter->rx_scrq[i]->irq,
1263                                          adapter->rx_scrq[i]);
1264                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1265                                 release_sub_crq_queue(adapter,
1266                                                       adapter->rx_scrq[i]);
1267                         }
1268                 adapter->rx_scrq = NULL;
1269         }
1270
1271         adapter->requested_caps = 0;
1272 }
1273
1274 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1275 {
1276         int i;
1277
1278         if (adapter->tx_scrq) {
1279                 for (i = 0; i < adapter->req_tx_queues; i++)
1280                         if (adapter->tx_scrq[i])
1281                                 release_sub_crq_queue(adapter,
1282                                                       adapter->tx_scrq[i]);
1283                 adapter->tx_scrq = NULL;
1284         }
1285
1286         if (adapter->rx_scrq) {
1287                 for (i = 0; i < adapter->req_rx_queues; i++)
1288                         if (adapter->rx_scrq[i])
1289                                 release_sub_crq_queue(adapter,
1290                                                       adapter->rx_scrq[i]);
1291                 adapter->rx_scrq = NULL;
1292         }
1293
1294         adapter->requested_caps = 0;
1295 }
1296
1297 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1298                             struct ibmvnic_sub_crq_queue *scrq)
1299 {
1300         struct device *dev = &adapter->vdev->dev;
1301         unsigned long rc;
1302
1303         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1304                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1305         if (rc)
1306                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1307                         scrq->hw_irq, rc);
1308         return rc;
1309 }
1310
1311 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1312                            struct ibmvnic_sub_crq_queue *scrq)
1313 {
1314         struct device *dev = &adapter->vdev->dev;
1315         unsigned long rc;
1316
1317         if (scrq->hw_irq > 0x100000000ULL) {
1318                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1319                 return 1;
1320         }
1321
1322         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1323                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1324         if (rc)
1325                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1326                         scrq->hw_irq, rc);
1327         return rc;
1328 }
1329
1330 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1331                                struct ibmvnic_sub_crq_queue *scrq)
1332 {
1333         struct device *dev = &adapter->vdev->dev;
1334         struct ibmvnic_tx_buff *txbuff;
1335         union sub_crq *next;
1336         int index;
1337         int i, j;
1338         u8 first;
1339
1340 restart_loop:
1341         while (pending_scrq(adapter, scrq)) {
1342                 unsigned int pool = scrq->pool_index;
1343
1344                 next = ibmvnic_next_scrq(adapter, scrq);
1345                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1346                         if (next->tx_comp.rcs[i]) {
1347                                 dev_err(dev, "tx error %x\n",
1348                                         next->tx_comp.rcs[i]);
1349                                 continue;
1350                         }
1351                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1352                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1353
1354                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1355                                 if (!txbuff->data_dma[j])
1356                                         continue;
1357
1358                                 txbuff->data_dma[j] = 0;
1359                                 txbuff->used_bounce = false;
1360                         }
1361                         /* if sub_crq was sent indirectly */
1362                         first = txbuff->indir_arr[0].generic.first;
1363                         if (first == IBMVNIC_CRQ_CMD) {
1364                                 dma_unmap_single(dev, txbuff->indir_dma,
1365                                                  sizeof(txbuff->indir_arr),
1366                                                  DMA_TO_DEVICE);
1367                         }
1368
1369                         if (txbuff->last_frag)
1370                                 dev_kfree_skb_any(txbuff->skb);
1371
1372                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1373                                                      producer_index] = index;
1374                         adapter->tx_pool[pool].producer_index =
1375                             (adapter->tx_pool[pool].producer_index + 1) %
1376                             adapter->max_tx_entries_per_subcrq;
1377                 }
1378                 /* remove tx_comp scrq*/
1379                 next->tx_comp.first = 0;
1380         }
1381
1382         enable_scrq_irq(adapter, scrq);
1383
1384         if (pending_scrq(adapter, scrq)) {
1385                 disable_scrq_irq(adapter, scrq);
1386                 goto restart_loop;
1387         }
1388
1389         return 0;
1390 }
1391
1392 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1393 {
1394         struct ibmvnic_sub_crq_queue *scrq = instance;
1395         struct ibmvnic_adapter *adapter = scrq->adapter;
1396
1397         disable_scrq_irq(adapter, scrq);
1398         ibmvnic_complete_tx(adapter, scrq);
1399
1400         return IRQ_HANDLED;
1401 }
1402
1403 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1404 {
1405         struct ibmvnic_sub_crq_queue *scrq = instance;
1406         struct ibmvnic_adapter *adapter = scrq->adapter;
1407
1408         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1409                 disable_scrq_irq(adapter, scrq);
1410                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1411         }
1412
1413         return IRQ_HANDLED;
1414 }
1415
1416 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1417 {
1418         struct device *dev = &adapter->vdev->dev;
1419         struct ibmvnic_sub_crq_queue *scrq;
1420         int i = 0, j = 0;
1421         int rc = 0;
1422
1423         for (i = 0; i < adapter->req_tx_queues; i++) {
1424                 scrq = adapter->tx_scrq[i];
1425                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1426
1427                 if (!scrq->irq) {
1428                         rc = -EINVAL;
1429                         dev_err(dev, "Error mapping irq\n");
1430                         goto req_tx_irq_failed;
1431                 }
1432
1433                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1434                                  0, "ibmvnic_tx", scrq);
1435
1436                 if (rc) {
1437                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1438                                 scrq->irq, rc);
1439                         irq_dispose_mapping(scrq->irq);
1440                         goto req_rx_irq_failed;
1441                 }
1442         }
1443
1444         for (i = 0; i < adapter->req_rx_queues; i++) {
1445                 scrq = adapter->rx_scrq[i];
1446                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1447                 if (!scrq->irq) {
1448                         rc = -EINVAL;
1449                         dev_err(dev, "Error mapping irq\n");
1450                         goto req_rx_irq_failed;
1451                 }
1452                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1453                                  0, "ibmvnic_rx", scrq);
1454                 if (rc) {
1455                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1456                                 scrq->irq, rc);
1457                         irq_dispose_mapping(scrq->irq);
1458                         goto req_rx_irq_failed;
1459                 }
1460         }
1461         return rc;
1462
1463 req_rx_irq_failed:
1464         for (j = 0; j < i; j++) {
1465                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1466                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1467         }
1468         i = adapter->req_tx_queues;
1469 req_tx_irq_failed:
1470         for (j = 0; j < i; j++) {
1471                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1472                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1473         }
1474         release_sub_crqs_no_irqs(adapter);
1475         return rc;
1476 }
1477
1478 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1479 {
1480         struct device *dev = &adapter->vdev->dev;
1481         struct ibmvnic_sub_crq_queue **allqueues;
1482         int registered_queues = 0;
1483         union ibmvnic_crq crq;
1484         int total_queues;
1485         int more = 0;
1486         int i;
1487
1488         if (!retry) {
1489                 /* Sub-CRQ entries are 32 byte long */
1490                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1491
1492                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1493                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1494                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1495                         goto allqueues_failed;
1496                 }
1497
1498                 /* Get the minimum between the queried max and the entries
1499                  * that fit in our PAGE_SIZE
1500                  */
1501                 adapter->req_tx_entries_per_subcrq =
1502                     adapter->max_tx_entries_per_subcrq > entries_page ?
1503                     entries_page : adapter->max_tx_entries_per_subcrq;
1504                 adapter->req_rx_add_entries_per_subcrq =
1505                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1506                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1507
1508                 /* Choosing the maximum number of queues supported by firmware*/
1509                 adapter->req_tx_queues = adapter->max_tx_queues;
1510                 adapter->req_rx_queues = adapter->max_rx_queues;
1511                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1512
1513                 adapter->req_mtu = adapter->max_mtu;
1514         }
1515
1516         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1517
1518         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1519         if (!allqueues)
1520                 goto allqueues_failed;
1521
1522         for (i = 0; i < total_queues; i++) {
1523                 allqueues[i] = init_sub_crq_queue(adapter);
1524                 if (!allqueues[i]) {
1525                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1526                         break;
1527                 }
1528                 registered_queues++;
1529         }
1530
1531         /* Make sure we were able to register the minimum number of queues */
1532         if (registered_queues <
1533             adapter->min_tx_queues + adapter->min_rx_queues) {
1534                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1535                 goto tx_failed;
1536         }
1537
1538         /* Distribute the failed allocated queues*/
1539         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1540                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1541                 switch (i % 3) {
1542                 case 0:
1543                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1544                                 adapter->req_rx_queues--;
1545                         else
1546                                 more++;
1547                         break;
1548                 case 1:
1549                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1550                                 adapter->req_tx_queues--;
1551                         else
1552                                 more++;
1553                         break;
1554                 }
1555         }
1556
1557         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1558                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1559         if (!adapter->tx_scrq)
1560                 goto tx_failed;
1561
1562         for (i = 0; i < adapter->req_tx_queues; i++) {
1563                 adapter->tx_scrq[i] = allqueues[i];
1564                 adapter->tx_scrq[i]->pool_index = i;
1565         }
1566
1567         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1568                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1569         if (!adapter->rx_scrq)
1570                 goto rx_failed;
1571
1572         for (i = 0; i < adapter->req_rx_queues; i++) {
1573                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1574                 adapter->rx_scrq[i]->scrq_num = i;
1575         }
1576
1577         memset(&crq, 0, sizeof(crq));
1578         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1579         crq.request_capability.cmd = REQUEST_CAPABILITY;
1580
1581         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1582         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1583         ibmvnic_send_crq(adapter, &crq);
1584
1585         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1586         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1587         ibmvnic_send_crq(adapter, &crq);
1588
1589         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1590         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1591         ibmvnic_send_crq(adapter, &crq);
1592
1593         crq.request_capability.capability =
1594             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1595         crq.request_capability.number =
1596             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1597         ibmvnic_send_crq(adapter, &crq);
1598
1599         crq.request_capability.capability =
1600             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1601         crq.request_capability.number =
1602             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1603         ibmvnic_send_crq(adapter, &crq);
1604
1605         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1606         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1607         ibmvnic_send_crq(adapter, &crq);
1608
1609         if (adapter->netdev->flags & IFF_PROMISC) {
1610                 if (adapter->promisc_supported) {
1611                         crq.request_capability.capability =
1612                             cpu_to_be16(PROMISC_REQUESTED);
1613                         crq.request_capability.number = cpu_to_be64(1);
1614                         ibmvnic_send_crq(adapter, &crq);
1615                 }
1616         } else {
1617                 crq.request_capability.capability =
1618                     cpu_to_be16(PROMISC_REQUESTED);
1619                 crq.request_capability.number = cpu_to_be64(0);
1620                 ibmvnic_send_crq(adapter, &crq);
1621         }
1622
1623         kfree(allqueues);
1624
1625         return;
1626
1627 rx_failed:
1628         kfree(adapter->tx_scrq);
1629         adapter->tx_scrq = NULL;
1630 tx_failed:
1631         for (i = 0; i < registered_queues; i++)
1632                 release_sub_crq_queue(adapter, allqueues[i]);
1633         kfree(allqueues);
1634 allqueues_failed:
1635         ibmvnic_remove(adapter->vdev);
1636 }
1637
1638 static int pending_scrq(struct ibmvnic_adapter *adapter,
1639                         struct ibmvnic_sub_crq_queue *scrq)
1640 {
1641         union sub_crq *entry = &scrq->msgs[scrq->cur];
1642
1643         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1644                 return 1;
1645         else
1646                 return 0;
1647 }
1648
1649 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1650                                         struct ibmvnic_sub_crq_queue *scrq)
1651 {
1652         union sub_crq *entry;
1653         unsigned long flags;
1654
1655         spin_lock_irqsave(&scrq->lock, flags);
1656         entry = &scrq->msgs[scrq->cur];
1657         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1658                 if (++scrq->cur == scrq->size)
1659                         scrq->cur = 0;
1660         } else {
1661                 entry = NULL;
1662         }
1663         spin_unlock_irqrestore(&scrq->lock, flags);
1664
1665         return entry;
1666 }
1667
1668 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1669 {
1670         struct ibmvnic_crq_queue *queue = &adapter->crq;
1671         union ibmvnic_crq *crq;
1672
1673         crq = &queue->msgs[queue->cur];
1674         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1675                 if (++queue->cur == queue->size)
1676                         queue->cur = 0;
1677         } else {
1678                 crq = NULL;
1679         }
1680
1681         return crq;
1682 }
1683
1684 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1685                        union sub_crq *sub_crq)
1686 {
1687         unsigned int ua = adapter->vdev->unit_address;
1688         struct device *dev = &adapter->vdev->dev;
1689         u64 *u64_crq = (u64 *)sub_crq;
1690         int rc;
1691
1692         netdev_dbg(adapter->netdev,
1693                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1694                    (unsigned long int)cpu_to_be64(remote_handle),
1695                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1696                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1697                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1698                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1699
1700         /* Make sure the hypervisor sees the complete request */
1701         mb();
1702
1703         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1704                                 cpu_to_be64(remote_handle),
1705                                 cpu_to_be64(u64_crq[0]),
1706                                 cpu_to_be64(u64_crq[1]),
1707                                 cpu_to_be64(u64_crq[2]),
1708                                 cpu_to_be64(u64_crq[3]));
1709
1710         if (rc) {
1711                 if (rc == H_CLOSED)
1712                         dev_warn(dev, "CRQ Queue closed\n");
1713                 dev_err(dev, "Send error (rc=%d)\n", rc);
1714         }
1715
1716         return rc;
1717 }
1718
1719 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1720                                 u64 remote_handle, u64 ioba, u64 num_entries)
1721 {
1722         unsigned int ua = adapter->vdev->unit_address;
1723         struct device *dev = &adapter->vdev->dev;
1724         int rc;
1725
1726         /* Make sure the hypervisor sees the complete request */
1727         mb();
1728         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1729                                 cpu_to_be64(remote_handle),
1730                                 ioba, num_entries);
1731
1732         if (rc) {
1733                 if (rc == H_CLOSED)
1734                         dev_warn(dev, "CRQ Queue closed\n");
1735                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1736         }
1737
1738         return rc;
1739 }
1740
1741 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1742                             union ibmvnic_crq *crq)
1743 {
1744         unsigned int ua = adapter->vdev->unit_address;
1745         struct device *dev = &adapter->vdev->dev;
1746         u64 *u64_crq = (u64 *)crq;
1747         int rc;
1748
1749         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1750                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1751                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1752
1753         /* Make sure the hypervisor sees the complete request */
1754         mb();
1755
1756         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1757                                 cpu_to_be64(u64_crq[0]),
1758                                 cpu_to_be64(u64_crq[1]));
1759
1760         if (rc) {
1761                 if (rc == H_CLOSED)
1762                         dev_warn(dev, "CRQ Queue closed\n");
1763                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1764         }
1765
1766         return rc;
1767 }
1768
1769 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1770 {
1771         union ibmvnic_crq crq;
1772
1773         memset(&crq, 0, sizeof(crq));
1774         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1775         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1776         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1777
1778         return ibmvnic_send_crq(adapter, &crq);
1779 }
1780
1781 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1782 {
1783         union ibmvnic_crq crq;
1784
1785         memset(&crq, 0, sizeof(crq));
1786         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1787         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1788         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1789
1790         return ibmvnic_send_crq(adapter, &crq);
1791 }
1792
1793 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1794 {
1795         union ibmvnic_crq crq;
1796
1797         memset(&crq, 0, sizeof(crq));
1798         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1799         crq.version_exchange.cmd = VERSION_EXCHANGE;
1800         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1801
1802         return ibmvnic_send_crq(adapter, &crq);
1803 }
1804
1805 static void send_login(struct ibmvnic_adapter *adapter)
1806 {
1807         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1808         struct ibmvnic_login_buffer *login_buffer;
1809         struct ibmvnic_inflight_cmd *inflight_cmd;
1810         struct device *dev = &adapter->vdev->dev;
1811         dma_addr_t rsp_buffer_token;
1812         dma_addr_t buffer_token;
1813         size_t rsp_buffer_size;
1814         union ibmvnic_crq crq;
1815         unsigned long flags;
1816         size_t buffer_size;
1817         __be64 *tx_list_p;
1818         __be64 *rx_list_p;
1819         int i;
1820
1821         buffer_size =
1822             sizeof(struct ibmvnic_login_buffer) +
1823             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1824
1825         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1826         if (!login_buffer)
1827                 goto buf_alloc_failed;
1828
1829         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1830                                       DMA_TO_DEVICE);
1831         if (dma_mapping_error(dev, buffer_token)) {
1832                 dev_err(dev, "Couldn't map login buffer\n");
1833                 goto buf_map_failed;
1834         }
1835
1836         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1837                           sizeof(u64) * adapter->req_tx_queues +
1838                           sizeof(u64) * adapter->req_rx_queues +
1839                           sizeof(u64) * adapter->req_rx_queues +
1840                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1841
1842         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1843         if (!login_rsp_buffer)
1844                 goto buf_rsp_alloc_failed;
1845
1846         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1847                                           rsp_buffer_size, DMA_FROM_DEVICE);
1848         if (dma_mapping_error(dev, rsp_buffer_token)) {
1849                 dev_err(dev, "Couldn't map login rsp buffer\n");
1850                 goto buf_rsp_map_failed;
1851         }
1852         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1853         if (!inflight_cmd) {
1854                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1855                 goto inflight_alloc_failed;
1856         }
1857         adapter->login_buf = login_buffer;
1858         adapter->login_buf_token = buffer_token;
1859         adapter->login_buf_sz = buffer_size;
1860         adapter->login_rsp_buf = login_rsp_buffer;
1861         adapter->login_rsp_buf_token = rsp_buffer_token;
1862         adapter->login_rsp_buf_sz = rsp_buffer_size;
1863
1864         login_buffer->len = cpu_to_be32(buffer_size);
1865         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1866         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1867         login_buffer->off_txcomp_subcrqs =
1868             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1869         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1870         login_buffer->off_rxcomp_subcrqs =
1871             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1872                         sizeof(u64) * adapter->req_tx_queues);
1873         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1874         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1875
1876         tx_list_p = (__be64 *)((char *)login_buffer +
1877                                       sizeof(struct ibmvnic_login_buffer));
1878         rx_list_p = (__be64 *)((char *)login_buffer +
1879                                       sizeof(struct ibmvnic_login_buffer) +
1880                                       sizeof(u64) * adapter->req_tx_queues);
1881
1882         for (i = 0; i < adapter->req_tx_queues; i++) {
1883                 if (adapter->tx_scrq[i]) {
1884                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1885                                                    crq_num);
1886                 }
1887         }
1888
1889         for (i = 0; i < adapter->req_rx_queues; i++) {
1890                 if (adapter->rx_scrq[i]) {
1891                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1892                                                    crq_num);
1893                 }
1894         }
1895
1896         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1897         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1898                 netdev_dbg(adapter->netdev, "%016lx\n",
1899                            ((unsigned long int *)(adapter->login_buf))[i]);
1900         }
1901
1902         memset(&crq, 0, sizeof(crq));
1903         crq.login.first = IBMVNIC_CRQ_CMD;
1904         crq.login.cmd = LOGIN;
1905         crq.login.ioba = cpu_to_be32(buffer_token);
1906         crq.login.len = cpu_to_be32(buffer_size);
1907
1908         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1909
1910         spin_lock_irqsave(&adapter->inflight_lock, flags);
1911         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1912         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1913
1914         ibmvnic_send_crq(adapter, &crq);
1915
1916         return;
1917
1918 inflight_alloc_failed:
1919         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1920                          DMA_FROM_DEVICE);
1921 buf_rsp_map_failed:
1922         kfree(login_rsp_buffer);
1923 buf_rsp_alloc_failed:
1924         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1925 buf_map_failed:
1926         kfree(login_buffer);
1927 buf_alloc_failed:
1928         return;
1929 }
1930
1931 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1932                              u32 len, u8 map_id)
1933 {
1934         union ibmvnic_crq crq;
1935
1936         memset(&crq, 0, sizeof(crq));
1937         crq.request_map.first = IBMVNIC_CRQ_CMD;
1938         crq.request_map.cmd = REQUEST_MAP;
1939         crq.request_map.map_id = map_id;
1940         crq.request_map.ioba = cpu_to_be32(addr);
1941         crq.request_map.len = cpu_to_be32(len);
1942         ibmvnic_send_crq(adapter, &crq);
1943 }
1944
1945 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1946 {
1947         union ibmvnic_crq crq;
1948
1949         memset(&crq, 0, sizeof(crq));
1950         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1951         crq.request_unmap.cmd = REQUEST_UNMAP;
1952         crq.request_unmap.map_id = map_id;
1953         ibmvnic_send_crq(adapter, &crq);
1954 }
1955
1956 static void send_map_query(struct ibmvnic_adapter *adapter)
1957 {
1958         union ibmvnic_crq crq;
1959
1960         memset(&crq, 0, sizeof(crq));
1961         crq.query_map.first = IBMVNIC_CRQ_CMD;
1962         crq.query_map.cmd = QUERY_MAP;
1963         ibmvnic_send_crq(adapter, &crq);
1964 }
1965
1966 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1967 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1968 {
1969         union ibmvnic_crq crq;
1970
1971         atomic_set(&adapter->running_cap_queries, 0);
1972         memset(&crq, 0, sizeof(crq));
1973         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1974         crq.query_capability.cmd = QUERY_CAPABILITY;
1975
1976         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1977         atomic_inc(&adapter->running_cap_queries);
1978         ibmvnic_send_crq(adapter, &crq);
1979
1980         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1981         atomic_inc(&adapter->running_cap_queries);
1982         ibmvnic_send_crq(adapter, &crq);
1983
1984         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1985         atomic_inc(&adapter->running_cap_queries);
1986         ibmvnic_send_crq(adapter, &crq);
1987
1988         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1989         atomic_inc(&adapter->running_cap_queries);
1990         ibmvnic_send_crq(adapter, &crq);
1991
1992         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1993         atomic_inc(&adapter->running_cap_queries);
1994         ibmvnic_send_crq(adapter, &crq);
1995
1996         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1997         atomic_inc(&adapter->running_cap_queries);
1998         ibmvnic_send_crq(adapter, &crq);
1999
2000         crq.query_capability.capability =
2001             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
2002         atomic_inc(&adapter->running_cap_queries);
2003         ibmvnic_send_crq(adapter, &crq);
2004
2005         crq.query_capability.capability =
2006             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2007         atomic_inc(&adapter->running_cap_queries);
2008         ibmvnic_send_crq(adapter, &crq);
2009
2010         crq.query_capability.capability =
2011             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2012         atomic_inc(&adapter->running_cap_queries);
2013         ibmvnic_send_crq(adapter, &crq);
2014
2015         crq.query_capability.capability =
2016             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2017         atomic_inc(&adapter->running_cap_queries);
2018         ibmvnic_send_crq(adapter, &crq);
2019
2020         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2021         atomic_inc(&adapter->running_cap_queries);
2022         ibmvnic_send_crq(adapter, &crq);
2023
2024         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2025         atomic_inc(&adapter->running_cap_queries);
2026         ibmvnic_send_crq(adapter, &crq);
2027
2028         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2029         atomic_inc(&adapter->running_cap_queries);
2030         ibmvnic_send_crq(adapter, &crq);
2031
2032         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2033         atomic_inc(&adapter->running_cap_queries);
2034         ibmvnic_send_crq(adapter, &crq);
2035
2036         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2037         atomic_inc(&adapter->running_cap_queries);
2038         ibmvnic_send_crq(adapter, &crq);
2039
2040         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2041         atomic_inc(&adapter->running_cap_queries);
2042         ibmvnic_send_crq(adapter, &crq);
2043
2044         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2045         atomic_inc(&adapter->running_cap_queries);
2046         ibmvnic_send_crq(adapter, &crq);
2047
2048         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2049         atomic_inc(&adapter->running_cap_queries);
2050         ibmvnic_send_crq(adapter, &crq);
2051
2052         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2053         atomic_inc(&adapter->running_cap_queries);
2054         ibmvnic_send_crq(adapter, &crq);
2055
2056         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2057         atomic_inc(&adapter->running_cap_queries);
2058         ibmvnic_send_crq(adapter, &crq);
2059
2060         crq.query_capability.capability =
2061                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2062         atomic_inc(&adapter->running_cap_queries);
2063         ibmvnic_send_crq(adapter, &crq);
2064
2065         crq.query_capability.capability =
2066                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2067         atomic_inc(&adapter->running_cap_queries);
2068         ibmvnic_send_crq(adapter, &crq);
2069
2070         crq.query_capability.capability =
2071                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2072         atomic_inc(&adapter->running_cap_queries);
2073         ibmvnic_send_crq(adapter, &crq);
2074
2075         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2076         atomic_inc(&adapter->running_cap_queries);
2077         ibmvnic_send_crq(adapter, &crq);
2078 }
2079
2080 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2081 {
2082         struct device *dev = &adapter->vdev->dev;
2083         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2084         union ibmvnic_crq crq;
2085         int i;
2086
2087         dma_unmap_single(dev, adapter->ip_offload_tok,
2088                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2089
2090         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2091         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2092                 netdev_dbg(adapter->netdev, "%016lx\n",
2093                            ((unsigned long int *)(buf))[i]);
2094
2095         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2096         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2097         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2098                    buf->tcp_ipv4_chksum);
2099         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2100                    buf->tcp_ipv6_chksum);
2101         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2102                    buf->udp_ipv4_chksum);
2103         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2104                    buf->udp_ipv6_chksum);
2105         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2106                    buf->large_tx_ipv4);
2107         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2108                    buf->large_tx_ipv6);
2109         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2110                    buf->large_rx_ipv4);
2111         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2112                    buf->large_rx_ipv6);
2113         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2114                    buf->max_ipv4_header_size);
2115         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2116                    buf->max_ipv6_header_size);
2117         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2118                    buf->max_tcp_header_size);
2119         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2120                    buf->max_udp_header_size);
2121         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2122                    buf->max_large_tx_size);
2123         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2124                    buf->max_large_rx_size);
2125         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2126                    buf->ipv6_extension_header);
2127         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2128                    buf->tcp_pseudosum_req);
2129         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2130                    buf->num_ipv6_ext_headers);
2131         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2132                    buf->off_ipv6_ext_headers);
2133
2134         adapter->ip_offload_ctrl_tok =
2135             dma_map_single(dev, &adapter->ip_offload_ctrl,
2136                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2137
2138         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2139                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2140                 return;
2141         }
2142
2143         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2144         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2145         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2146         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2147         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2148
2149         /* large_tx/rx disabled for now, additional features needed */
2150         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2151         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2152         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2153         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2154
2155         adapter->netdev->features = NETIF_F_GSO;
2156
2157         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2158                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2159
2160         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2161                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2162
2163         if ((adapter->netdev->features &
2164             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2165                 adapter->netdev->features |= NETIF_F_RXCSUM;
2166
2167         memset(&crq, 0, sizeof(crq));
2168         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2169         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2170         crq.control_ip_offload.len =
2171             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2172         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2173         ibmvnic_send_crq(adapter, &crq);
2174 }
2175
2176 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2177                                   struct ibmvnic_adapter *adapter)
2178 {
2179         struct device *dev = &adapter->vdev->dev;
2180         struct ibmvnic_error_buff *error_buff, *tmp;
2181         unsigned long flags;
2182         bool found = false;
2183         int i;
2184
2185         if (!crq->request_error_rsp.rc.code) {
2186                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2187                          crq->request_error_rsp.rc.code);
2188                 return;
2189         }
2190
2191         spin_lock_irqsave(&adapter->error_list_lock, flags);
2192         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2193                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2194                         found = true;
2195                         list_del(&error_buff->list);
2196                         break;
2197                 }
2198         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2199
2200         if (!found) {
2201                 dev_err(dev, "Couldn't find error id %x\n",
2202                         crq->request_error_rsp.error_id);
2203                 return;
2204         }
2205
2206         dev_err(dev, "Detailed info for error id %x:",
2207                 crq->request_error_rsp.error_id);
2208
2209         for (i = 0; i < error_buff->len; i++) {
2210                 pr_cont("%02x", (int)error_buff->buff[i]);
2211                 if (i % 8 == 7)
2212                         pr_cont(" ");
2213         }
2214         pr_cont("\n");
2215
2216         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2217                          DMA_FROM_DEVICE);
2218         kfree(error_buff->buff);
2219         kfree(error_buff);
2220 }
2221
2222 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2223                                  struct ibmvnic_adapter *adapter)
2224 {
2225         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2226         struct ibmvnic_inflight_cmd *inflight_cmd;
2227         struct device *dev = &adapter->vdev->dev;
2228         union ibmvnic_crq newcrq;
2229         unsigned long flags;
2230
2231         /* allocate and map buffer */
2232         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2233         if (!adapter->dump_data) {
2234                 complete(&adapter->fw_done);
2235                 return;
2236         }
2237
2238         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2239                                                   DMA_FROM_DEVICE);
2240
2241         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2242                 if (!firmware_has_feature(FW_FEATURE_CMO))
2243                         dev_err(dev, "Couldn't map dump data\n");
2244                 kfree(adapter->dump_data);
2245                 complete(&adapter->fw_done);
2246                 return;
2247         }
2248
2249         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2250         if (!inflight_cmd) {
2251                 dma_unmap_single(dev, adapter->dump_data_token, len,
2252                                  DMA_FROM_DEVICE);
2253                 kfree(adapter->dump_data);
2254                 complete(&adapter->fw_done);
2255                 return;
2256         }
2257
2258         memset(&newcrq, 0, sizeof(newcrq));
2259         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2260         newcrq.request_dump.cmd = REQUEST_DUMP;
2261         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2262         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2263
2264         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2265
2266         spin_lock_irqsave(&adapter->inflight_lock, flags);
2267         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2268         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2269
2270         ibmvnic_send_crq(adapter, &newcrq);
2271 }
2272
2273 static void handle_error_indication(union ibmvnic_crq *crq,
2274                                     struct ibmvnic_adapter *adapter)
2275 {
2276         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2277         struct ibmvnic_inflight_cmd *inflight_cmd;
2278         struct device *dev = &adapter->vdev->dev;
2279         struct ibmvnic_error_buff *error_buff;
2280         union ibmvnic_crq new_crq;
2281         unsigned long flags;
2282
2283         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2284                 crq->error_indication.
2285                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2286                 crq->error_indication.error_id,
2287                 crq->error_indication.error_cause);
2288
2289         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2290         if (!error_buff)
2291                 return;
2292
2293         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2294         if (!error_buff->buff) {
2295                 kfree(error_buff);
2296                 return;
2297         }
2298
2299         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2300                                          DMA_FROM_DEVICE);
2301         if (dma_mapping_error(dev, error_buff->dma)) {
2302                 if (!firmware_has_feature(FW_FEATURE_CMO))
2303                         dev_err(dev, "Couldn't map error buffer\n");
2304                 kfree(error_buff->buff);
2305                 kfree(error_buff);
2306                 return;
2307         }
2308
2309         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2310         if (!inflight_cmd) {
2311                 dma_unmap_single(dev, error_buff->dma, detail_len,
2312                                  DMA_FROM_DEVICE);
2313                 kfree(error_buff->buff);
2314                 kfree(error_buff);
2315                 return;
2316         }
2317
2318         error_buff->len = detail_len;
2319         error_buff->error_id = crq->error_indication.error_id;
2320
2321         spin_lock_irqsave(&adapter->error_list_lock, flags);
2322         list_add_tail(&error_buff->list, &adapter->errors);
2323         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2324
2325         memset(&new_crq, 0, sizeof(new_crq));
2326         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2327         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2328         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2329         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2330         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2331
2332         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2333
2334         spin_lock_irqsave(&adapter->inflight_lock, flags);
2335         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2336         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2337
2338         ibmvnic_send_crq(adapter, &new_crq);
2339 }
2340
2341 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2342                                   struct ibmvnic_adapter *adapter)
2343 {
2344         struct net_device *netdev = adapter->netdev;
2345         struct device *dev = &adapter->vdev->dev;
2346         long rc;
2347
2348         rc = crq->change_mac_addr_rsp.rc.code;
2349         if (rc) {
2350                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2351                 return;
2352         }
2353         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2354                ETH_ALEN);
2355 }
2356
2357 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2358                                    struct ibmvnic_adapter *adapter)
2359 {
2360         struct device *dev = &adapter->vdev->dev;
2361         u64 *req_value;
2362         char *name;
2363
2364         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2365         case REQ_TX_QUEUES:
2366                 req_value = &adapter->req_tx_queues;
2367                 name = "tx";
2368                 break;
2369         case REQ_RX_QUEUES:
2370                 req_value = &adapter->req_rx_queues;
2371                 name = "rx";
2372                 break;
2373         case REQ_RX_ADD_QUEUES:
2374                 req_value = &adapter->req_rx_add_queues;
2375                 name = "rx_add";
2376                 break;
2377         case REQ_TX_ENTRIES_PER_SUBCRQ:
2378                 req_value = &adapter->req_tx_entries_per_subcrq;
2379                 name = "tx_entries_per_subcrq";
2380                 break;
2381         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2382                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2383                 name = "rx_add_entries_per_subcrq";
2384                 break;
2385         case REQ_MTU:
2386                 req_value = &adapter->req_mtu;
2387                 name = "mtu";
2388                 break;
2389         case PROMISC_REQUESTED:
2390                 req_value = &adapter->promisc;
2391                 name = "promisc";
2392                 break;
2393         default:
2394                 dev_err(dev, "Got invalid cap request rsp %d\n",
2395                         crq->request_capability.capability);
2396                 return;
2397         }
2398
2399         switch (crq->request_capability_rsp.rc.code) {
2400         case SUCCESS:
2401                 break;
2402         case PARTIALSUCCESS:
2403                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2404                          *req_value,
2405                          (long int)be32_to_cpu(crq->request_capability_rsp.
2406                                                number), name);
2407                 release_sub_crqs_no_irqs(adapter);
2408                 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2409                 init_sub_crqs(adapter, 1);
2410                 return;
2411         default:
2412                 dev_err(dev, "Error %d in request cap rsp\n",
2413                         crq->request_capability_rsp.rc.code);
2414                 return;
2415         }
2416
2417         /* Done receiving requested capabilities, query IP offload support */
2418         if (++adapter->requested_caps == 7) {
2419                 union ibmvnic_crq newcrq;
2420                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2421                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2422                     &adapter->ip_offload_buf;
2423
2424                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2425                                                          buf_sz,
2426                                                          DMA_FROM_DEVICE);
2427
2428                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2429                         if (!firmware_has_feature(FW_FEATURE_CMO))
2430                                 dev_err(dev, "Couldn't map offload buffer\n");
2431                         return;
2432                 }
2433
2434                 memset(&newcrq, 0, sizeof(newcrq));
2435                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2436                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2437                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2438                 newcrq.query_ip_offload.ioba =
2439                     cpu_to_be32(adapter->ip_offload_tok);
2440
2441                 ibmvnic_send_crq(adapter, &newcrq);
2442         }
2443 }
2444
2445 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2446                             struct ibmvnic_adapter *adapter)
2447 {
2448         struct device *dev = &adapter->vdev->dev;
2449         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2450         struct ibmvnic_login_buffer *login = adapter->login_buf;
2451         union ibmvnic_crq crq;
2452         int i;
2453
2454         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2455                          DMA_BIDIRECTIONAL);
2456         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2457                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2458
2459         /* If the number of queues requested can't be allocated by the
2460          * server, the login response will return with code 1. We will need
2461          * to resend the login buffer with fewer queues requested.
2462          */
2463         if (login_rsp_crq->generic.rc.code) {
2464                 adapter->renegotiate = true;
2465                 complete(&adapter->init_done);
2466                 return 0;
2467         }
2468
2469         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2470         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2471                 netdev_dbg(adapter->netdev, "%016lx\n",
2472                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2473         }
2474
2475         /* Sanity checks */
2476         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2477             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2478              adapter->req_rx_add_queues !=
2479              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2480                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2481                 ibmvnic_remove(adapter->vdev);
2482                 return -EIO;
2483         }
2484         complete(&adapter->init_done);
2485
2486         memset(&crq, 0, sizeof(crq));
2487         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2488         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2489         ibmvnic_send_crq(adapter, &crq);
2490
2491         return 0;
2492 }
2493
2494 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2495                                    struct ibmvnic_adapter *adapter)
2496 {
2497         struct device *dev = &adapter->vdev->dev;
2498         u8 map_id = crq->request_map_rsp.map_id;
2499         int tx_subcrqs;
2500         int rx_subcrqs;
2501         long rc;
2502         int i;
2503
2504         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2505         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2506
2507         rc = crq->request_map_rsp.rc.code;
2508         if (rc) {
2509                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2510                 adapter->map_id--;
2511                 /* need to find and zero tx/rx_pool map_id */
2512                 for (i = 0; i < tx_subcrqs; i++) {
2513                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2514                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2515                 }
2516                 for (i = 0; i < rx_subcrqs; i++) {
2517                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2518                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2519                 }
2520         }
2521         complete(&adapter->fw_done);
2522 }
2523
2524 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2525                                      struct ibmvnic_adapter *adapter)
2526 {
2527         struct device *dev = &adapter->vdev->dev;
2528         long rc;
2529
2530         rc = crq->request_unmap_rsp.rc.code;
2531         if (rc)
2532                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2533 }
2534
2535 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2536                                  struct ibmvnic_adapter *adapter)
2537 {
2538         struct net_device *netdev = adapter->netdev;
2539         struct device *dev = &adapter->vdev->dev;
2540         long rc;
2541
2542         rc = crq->query_map_rsp.rc.code;
2543         if (rc) {
2544                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2545                 return;
2546         }
2547         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2548                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2549                    crq->query_map_rsp.free_pages);
2550 }
2551
2552 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2553                                  struct ibmvnic_adapter *adapter)
2554 {
2555         struct net_device *netdev = adapter->netdev;
2556         struct device *dev = &adapter->vdev->dev;
2557         long rc;
2558
2559         atomic_dec(&adapter->running_cap_queries);
2560         netdev_dbg(netdev, "Outstanding queries: %d\n",
2561                    atomic_read(&adapter->running_cap_queries));
2562         rc = crq->query_capability.rc.code;
2563         if (rc) {
2564                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2565                 goto out;
2566         }
2567
2568         switch (be16_to_cpu(crq->query_capability.capability)) {
2569         case MIN_TX_QUEUES:
2570                 adapter->min_tx_queues =
2571                     be64_to_cpu(crq->query_capability.number);
2572                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2573                            adapter->min_tx_queues);
2574                 break;
2575         case MIN_RX_QUEUES:
2576                 adapter->min_rx_queues =
2577                     be64_to_cpu(crq->query_capability.number);
2578                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2579                            adapter->min_rx_queues);
2580                 break;
2581         case MIN_RX_ADD_QUEUES:
2582                 adapter->min_rx_add_queues =
2583                     be64_to_cpu(crq->query_capability.number);
2584                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2585                            adapter->min_rx_add_queues);
2586                 break;
2587         case MAX_TX_QUEUES:
2588                 adapter->max_tx_queues =
2589                     be64_to_cpu(crq->query_capability.number);
2590                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2591                            adapter->max_tx_queues);
2592                 break;
2593         case MAX_RX_QUEUES:
2594                 adapter->max_rx_queues =
2595                     be64_to_cpu(crq->query_capability.number);
2596                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2597                            adapter->max_rx_queues);
2598                 break;
2599         case MAX_RX_ADD_QUEUES:
2600                 adapter->max_rx_add_queues =
2601                     be64_to_cpu(crq->query_capability.number);
2602                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2603                            adapter->max_rx_add_queues);
2604                 break;
2605         case MIN_TX_ENTRIES_PER_SUBCRQ:
2606                 adapter->min_tx_entries_per_subcrq =
2607                     be64_to_cpu(crq->query_capability.number);
2608                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2609                            adapter->min_tx_entries_per_subcrq);
2610                 break;
2611         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2612                 adapter->min_rx_add_entries_per_subcrq =
2613                     be64_to_cpu(crq->query_capability.number);
2614                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2615                            adapter->min_rx_add_entries_per_subcrq);
2616                 break;
2617         case MAX_TX_ENTRIES_PER_SUBCRQ:
2618                 adapter->max_tx_entries_per_subcrq =
2619                     be64_to_cpu(crq->query_capability.number);
2620                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2621                            adapter->max_tx_entries_per_subcrq);
2622                 break;
2623         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2624                 adapter->max_rx_add_entries_per_subcrq =
2625                     be64_to_cpu(crq->query_capability.number);
2626                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2627                            adapter->max_rx_add_entries_per_subcrq);
2628                 break;
2629         case TCP_IP_OFFLOAD:
2630                 adapter->tcp_ip_offload =
2631                     be64_to_cpu(crq->query_capability.number);
2632                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2633                            adapter->tcp_ip_offload);
2634                 break;
2635         case PROMISC_SUPPORTED:
2636                 adapter->promisc_supported =
2637                     be64_to_cpu(crq->query_capability.number);
2638                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2639                            adapter->promisc_supported);
2640                 break;
2641         case MIN_MTU:
2642                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2643                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2644                 break;
2645         case MAX_MTU:
2646                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2647                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2648                 break;
2649         case MAX_MULTICAST_FILTERS:
2650                 adapter->max_multicast_filters =
2651                     be64_to_cpu(crq->query_capability.number);
2652                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2653                            adapter->max_multicast_filters);
2654                 break;
2655         case VLAN_HEADER_INSERTION:
2656                 adapter->vlan_header_insertion =
2657                     be64_to_cpu(crq->query_capability.number);
2658                 if (adapter->vlan_header_insertion)
2659                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2660                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2661                            adapter->vlan_header_insertion);
2662                 break;
2663         case MAX_TX_SG_ENTRIES:
2664                 adapter->max_tx_sg_entries =
2665                     be64_to_cpu(crq->query_capability.number);
2666                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2667                            adapter->max_tx_sg_entries);
2668                 break;
2669         case RX_SG_SUPPORTED:
2670                 adapter->rx_sg_supported =
2671                     be64_to_cpu(crq->query_capability.number);
2672                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2673                            adapter->rx_sg_supported);
2674                 break;
2675         case OPT_TX_COMP_SUB_QUEUES:
2676                 adapter->opt_tx_comp_sub_queues =
2677                     be64_to_cpu(crq->query_capability.number);
2678                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2679                            adapter->opt_tx_comp_sub_queues);
2680                 break;
2681         case OPT_RX_COMP_QUEUES:
2682                 adapter->opt_rx_comp_queues =
2683                     be64_to_cpu(crq->query_capability.number);
2684                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2685                            adapter->opt_rx_comp_queues);
2686                 break;
2687         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2688                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2689                     be64_to_cpu(crq->query_capability.number);
2690                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2691                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2692                 break;
2693         case OPT_TX_ENTRIES_PER_SUBCRQ:
2694                 adapter->opt_tx_entries_per_subcrq =
2695                     be64_to_cpu(crq->query_capability.number);
2696                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2697                            adapter->opt_tx_entries_per_subcrq);
2698                 break;
2699         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2700                 adapter->opt_rxba_entries_per_subcrq =
2701                     be64_to_cpu(crq->query_capability.number);
2702                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2703                            adapter->opt_rxba_entries_per_subcrq);
2704                 break;
2705         case TX_RX_DESC_REQ:
2706                 adapter->tx_rx_desc_req = crq->query_capability.number;
2707                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2708                            adapter->tx_rx_desc_req);
2709                 break;
2710
2711         default:
2712                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2713                            crq->query_capability.capability);
2714         }
2715
2716 out:
2717         if (atomic_read(&adapter->running_cap_queries) == 0)
2718                 init_sub_crqs(adapter, 0);
2719                 /* We're done querying the capabilities, initialize sub-crqs */
2720 }
2721
2722 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2723                                    struct ibmvnic_adapter *adapter)
2724 {
2725         u8 correlator = crq->control_ras_rsp.correlator;
2726         struct device *dev = &adapter->vdev->dev;
2727         bool found = false;
2728         int i;
2729
2730         if (crq->control_ras_rsp.rc.code) {
2731                 dev_warn(dev, "Control ras failed rc=%d\n",
2732                          crq->control_ras_rsp.rc.code);
2733                 return;
2734         }
2735
2736         for (i = 0; i < adapter->ras_comp_num; i++) {
2737                 if (adapter->ras_comps[i].correlator == correlator) {
2738                         found = true;
2739                         break;
2740                 }
2741         }
2742
2743         if (!found) {
2744                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2745                 return;
2746         }
2747
2748         switch (crq->control_ras_rsp.op) {
2749         case IBMVNIC_TRACE_LEVEL:
2750                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2751                 break;
2752         case IBMVNIC_ERROR_LEVEL:
2753                 adapter->ras_comps[i].error_check_level =
2754                     crq->control_ras.level;
2755                 break;
2756         case IBMVNIC_TRACE_PAUSE:
2757                 adapter->ras_comp_int[i].paused = 1;
2758                 break;
2759         case IBMVNIC_TRACE_RESUME:
2760                 adapter->ras_comp_int[i].paused = 0;
2761                 break;
2762         case IBMVNIC_TRACE_ON:
2763                 adapter->ras_comps[i].trace_on = 1;
2764                 break;
2765         case IBMVNIC_TRACE_OFF:
2766                 adapter->ras_comps[i].trace_on = 0;
2767                 break;
2768         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2769                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2770                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2771                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2772                     crq->control_ras_rsp.trace_buff_sz[0];
2773                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2774                     crq->control_ras_rsp.trace_buff_sz[1];
2775                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2776                     crq->control_ras_rsp.trace_buff_sz[2];
2777                 break;
2778         default:
2779                 dev_err(dev, "invalid op %d on control_ras_rsp",
2780                         crq->control_ras_rsp.op);
2781         }
2782 }
2783
2784 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2785                           loff_t *ppos)
2786 {
2787         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2788         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2789         struct device *dev = &adapter->vdev->dev;
2790         struct ibmvnic_fw_trace_entry *trace;
2791         int num = ras_comp_int->num;
2792         union ibmvnic_crq crq;
2793         dma_addr_t trace_tok;
2794
2795         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2796                 return 0;
2797
2798         trace =
2799             dma_alloc_coherent(dev,
2800                                be32_to_cpu(adapter->ras_comps[num].
2801                                            trace_buff_size), &trace_tok,
2802                                GFP_KERNEL);
2803         if (!trace) {
2804                 dev_err(dev, "Couldn't alloc trace buffer\n");
2805                 return 0;
2806         }
2807
2808         memset(&crq, 0, sizeof(crq));
2809         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2810         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2811         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2812         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2813         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2814         ibmvnic_send_crq(adapter, &crq);
2815
2816         init_completion(&adapter->fw_done);
2817         wait_for_completion(&adapter->fw_done);
2818
2819         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2820                 len =
2821                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2822                     *ppos;
2823
2824         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2825
2826         dma_free_coherent(dev,
2827                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2828                           trace, trace_tok);
2829         *ppos += len;
2830         return len;
2831 }
2832
2833 static const struct file_operations trace_ops = {
2834         .owner          = THIS_MODULE,
2835         .open           = simple_open,
2836         .read           = trace_read,
2837 };
2838
2839 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2840                            loff_t *ppos)
2841 {
2842         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2843         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2844         int num = ras_comp_int->num;
2845         char buff[5]; /*  1 or 0 plus \n and \0 */
2846         int size;
2847
2848         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2849
2850         if (*ppos >= size)
2851                 return 0;
2852
2853         copy_to_user(user_buf, buff, size);
2854         *ppos += size;
2855         return size;
2856 }
2857
2858 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2859                             size_t len, loff_t *ppos)
2860 {
2861         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2862         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2863         int num = ras_comp_int->num;
2864         union ibmvnic_crq crq;
2865         unsigned long val;
2866         char buff[9]; /* decimal max int plus \n and \0 */
2867
2868         copy_from_user(buff, user_buf, sizeof(buff));
2869         val = kstrtoul(buff, 10, NULL);
2870
2871         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2872
2873         memset(&crq, 0, sizeof(crq));
2874         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2875         crq.control_ras.cmd = CONTROL_RAS;
2876         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2877         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2878         ibmvnic_send_crq(adapter, &crq);
2879
2880         return len;
2881 }
2882
2883 static const struct file_operations paused_ops = {
2884         .owner          = THIS_MODULE,
2885         .open           = simple_open,
2886         .read           = paused_read,
2887         .write          = paused_write,
2888 };
2889
2890 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2891                             size_t len, loff_t *ppos)
2892 {
2893         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2894         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2895         int num = ras_comp_int->num;
2896         char buff[5]; /*  1 or 0 plus \n and \0 */
2897         int size;
2898
2899         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2900
2901         if (*ppos >= size)
2902                 return 0;
2903
2904         copy_to_user(user_buf, buff, size);
2905         *ppos += size;
2906         return size;
2907 }
2908
2909 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2910                              size_t len, loff_t *ppos)
2911 {
2912         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2913         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2914         int num = ras_comp_int->num;
2915         union ibmvnic_crq crq;
2916         unsigned long val;
2917         char buff[9]; /* decimal max int plus \n and \0 */
2918
2919         copy_from_user(buff, user_buf, sizeof(buff));
2920         val = kstrtoul(buff, 10, NULL);
2921
2922         memset(&crq, 0, sizeof(crq));
2923         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2924         crq.control_ras.cmd = CONTROL_RAS;
2925         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2926         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2927
2928         return len;
2929 }
2930
2931 static const struct file_operations tracing_ops = {
2932         .owner          = THIS_MODULE,
2933         .open           = simple_open,
2934         .read           = tracing_read,
2935         .write          = tracing_write,
2936 };
2937
2938 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2939                                 size_t len, loff_t *ppos)
2940 {
2941         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2942         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2943         int num = ras_comp_int->num;
2944         char buff[5]; /* decimal max char plus \n and \0 */
2945         int size;
2946
2947         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2948
2949         if (*ppos >= size)
2950                 return 0;
2951
2952         copy_to_user(user_buf, buff, size);
2953         *ppos += size;
2954         return size;
2955 }
2956
2957 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2958                                  size_t len, loff_t *ppos)
2959 {
2960         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2961         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2962         int num = ras_comp_int->num;
2963         union ibmvnic_crq crq;
2964         unsigned long val;
2965         char buff[9]; /* decimal max int plus \n and \0 */
2966
2967         copy_from_user(buff, user_buf, sizeof(buff));
2968         val = kstrtoul(buff, 10, NULL);
2969
2970         if (val > 9)
2971                 val = 9;
2972
2973         memset(&crq, 0, sizeof(crq));
2974         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2975         crq.control_ras.cmd = CONTROL_RAS;
2976         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2977         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2978         crq.control_ras.level = val;
2979         ibmvnic_send_crq(adapter, &crq);
2980
2981         return len;
2982 }
2983
2984 static const struct file_operations error_level_ops = {
2985         .owner          = THIS_MODULE,
2986         .open           = simple_open,
2987         .read           = error_level_read,
2988         .write          = error_level_write,
2989 };
2990
2991 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2992                                 size_t len, loff_t *ppos)
2993 {
2994         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2995         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2996         int num = ras_comp_int->num;
2997         char buff[5]; /* decimal max char plus \n and \0 */
2998         int size;
2999
3000         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
3001         if (*ppos >= size)
3002                 return 0;
3003
3004         copy_to_user(user_buf, buff, size);
3005         *ppos += size;
3006         return size;
3007 }
3008
3009 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3010                                  size_t len, loff_t *ppos)
3011 {
3012         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3013         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3014         union ibmvnic_crq crq;
3015         unsigned long val;
3016         char buff[9]; /* decimal max int plus \n and \0 */
3017
3018         copy_from_user(buff, user_buf, sizeof(buff));
3019         val = kstrtoul(buff, 10, NULL);
3020         if (val > 9)
3021                 val = 9;
3022
3023         memset(&crq, 0, sizeof(crq));
3024         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3025         crq.control_ras.cmd = CONTROL_RAS;
3026         crq.control_ras.correlator =
3027             adapter->ras_comps[ras_comp_int->num].correlator;
3028         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3029         crq.control_ras.level = val;
3030         ibmvnic_send_crq(adapter, &crq);
3031
3032         return len;
3033 }
3034
3035 static const struct file_operations trace_level_ops = {
3036         .owner          = THIS_MODULE,
3037         .open           = simple_open,
3038         .read           = trace_level_read,
3039         .write          = trace_level_write,
3040 };
3041
3042 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3043                                     size_t len, loff_t *ppos)
3044 {
3045         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3046         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3047         int num = ras_comp_int->num;
3048         char buff[9]; /* decimal max int plus \n and \0 */
3049         int size;
3050
3051         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3052         if (*ppos >= size)
3053                 return 0;
3054
3055         copy_to_user(user_buf, buff, size);
3056         *ppos += size;
3057         return size;
3058 }
3059
3060 static ssize_t trace_buff_size_write(struct file *file,
3061                                      const char __user *user_buf, size_t len,
3062                                      loff_t *ppos)
3063 {
3064         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3065         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3066         union ibmvnic_crq crq;
3067         unsigned long val;
3068         char buff[9]; /* decimal max int plus \n and \0 */
3069
3070         copy_from_user(buff, user_buf, sizeof(buff));
3071         val = kstrtoul(buff, 10, NULL);
3072
3073         memset(&crq, 0, sizeof(crq));
3074         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3075         crq.control_ras.cmd = CONTROL_RAS;
3076         crq.control_ras.correlator =
3077             adapter->ras_comps[ras_comp_int->num].correlator;
3078         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3079         /* trace_buff_sz is 3 bytes, stuff an int into it */
3080         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3081         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3082         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3083         ibmvnic_send_crq(adapter, &crq);
3084
3085         return len;
3086 }
3087
3088 static const struct file_operations trace_size_ops = {
3089         .owner          = THIS_MODULE,
3090         .open           = simple_open,
3091         .read           = trace_buff_size_read,
3092         .write          = trace_buff_size_write,
3093 };
3094
3095 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3096                                          struct ibmvnic_adapter *adapter)
3097 {
3098         struct device *dev = &adapter->vdev->dev;
3099         struct dentry *dir_ent;
3100         struct dentry *ent;
3101         int i;
3102
3103         debugfs_remove_recursive(adapter->ras_comps_ent);
3104
3105         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3106                                                     adapter->debugfs_dir);
3107         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3108                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3109                 return;
3110         }
3111
3112         for (i = 0; i < adapter->ras_comp_num; i++) {
3113                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3114                                              adapter->ras_comps_ent);
3115                 if (!dir_ent || IS_ERR(dir_ent)) {
3116                         dev_info(dev, "debugfs create %s dir failed\n",
3117                                  adapter->ras_comps[i].name);
3118                         continue;
3119                 }
3120
3121                 adapter->ras_comp_int[i].adapter = adapter;
3122                 adapter->ras_comp_int[i].num = i;
3123                 adapter->ras_comp_int[i].desc_blob.data =
3124                     &adapter->ras_comps[i].description;
3125                 adapter->ras_comp_int[i].desc_blob.size =
3126                     sizeof(adapter->ras_comps[i].description);
3127
3128                 /* Don't need to remember the dentry's because the debugfs dir
3129                  * gets removed recursively
3130                  */
3131                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3132                                           &adapter->ras_comp_int[i].desc_blob);
3133                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3134                                           dir_ent, &adapter->ras_comp_int[i],
3135                                           &trace_size_ops);
3136                 ent = debugfs_create_file("trace_level",
3137                                           S_IRUGO |
3138                                           (adapter->ras_comps[i].trace_level !=
3139                                            0xFF  ? S_IWUSR : 0),
3140                                            dir_ent, &adapter->ras_comp_int[i],
3141                                            &trace_level_ops);
3142                 ent = debugfs_create_file("error_level",
3143                                           S_IRUGO |
3144                                           (adapter->
3145                                            ras_comps[i].error_check_level !=
3146                                            0xFF ? S_IWUSR : 0),
3147                                           dir_ent, &adapter->ras_comp_int[i],
3148                                           &trace_level_ops);
3149                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3150                                           dir_ent, &adapter->ras_comp_int[i],
3151                                           &tracing_ops);
3152                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3153                                           dir_ent, &adapter->ras_comp_int[i],
3154                                           &paused_ops);
3155                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3156                                           &adapter->ras_comp_int[i],
3157                                           &trace_ops);
3158         }
3159 }
3160
3161 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3162                                             struct ibmvnic_adapter *adapter)
3163 {
3164         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3165         struct device *dev = &adapter->vdev->dev;
3166         union ibmvnic_crq newcrq;
3167
3168         adapter->ras_comps = dma_alloc_coherent(dev, len,
3169                                                 &adapter->ras_comps_tok,
3170                                                 GFP_KERNEL);
3171         if (!adapter->ras_comps) {
3172                 if (!firmware_has_feature(FW_FEATURE_CMO))
3173                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3174                 return;
3175         }
3176
3177         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3178                                         sizeof(struct ibmvnic_fw_comp_internal),
3179                                         GFP_KERNEL);
3180         if (!adapter->ras_comp_int)
3181                 dma_free_coherent(dev, len, adapter->ras_comps,
3182                                   adapter->ras_comps_tok);
3183
3184         memset(&newcrq, 0, sizeof(newcrq));
3185         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3186         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3187         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3188         newcrq.request_ras_comps.len = cpu_to_be32(len);
3189         ibmvnic_send_crq(adapter, &newcrq);
3190 }
3191
3192 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3193 {
3194         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3195         struct device *dev = &adapter->vdev->dev;
3196         struct ibmvnic_error_buff *error_buff, *tmp2;
3197         unsigned long flags;
3198         unsigned long flags2;
3199
3200         spin_lock_irqsave(&adapter->inflight_lock, flags);
3201         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3202                 switch (inflight_cmd->crq.generic.cmd) {
3203                 case LOGIN:
3204                         dma_unmap_single(dev, adapter->login_buf_token,
3205                                          adapter->login_buf_sz,
3206                                          DMA_BIDIRECTIONAL);
3207                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3208                                          adapter->login_rsp_buf_sz,
3209                                          DMA_BIDIRECTIONAL);
3210                         kfree(adapter->login_rsp_buf);
3211                         kfree(adapter->login_buf);
3212                         break;
3213                 case REQUEST_DUMP:
3214                         complete(&adapter->fw_done);
3215                         break;
3216                 case REQUEST_ERROR_INFO:
3217                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3218                         list_for_each_entry_safe(error_buff, tmp2,
3219                                                  &adapter->errors, list) {
3220                                 dma_unmap_single(dev, error_buff->dma,
3221                                                  error_buff->len,
3222                                                  DMA_FROM_DEVICE);
3223                                 kfree(error_buff->buff);
3224                                 list_del(&error_buff->list);
3225                                 kfree(error_buff);
3226                         }
3227                         spin_unlock_irqrestore(&adapter->error_list_lock,
3228                                                flags2);
3229                         break;
3230                 }
3231                 list_del(&inflight_cmd->list);
3232                 kfree(inflight_cmd);
3233         }
3234         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3235 }
3236
3237 static void ibmvnic_xport_event(struct work_struct *work)
3238 {
3239         struct ibmvnic_adapter *adapter = container_of(work,
3240                                                        struct ibmvnic_adapter,
3241                                                        ibmvnic_xport);
3242         struct device *dev = &adapter->vdev->dev;
3243         long rc;
3244
3245         ibmvnic_free_inflight(adapter);
3246         release_sub_crqs(adapter);
3247         if (adapter->migrated) {
3248                 rc = ibmvnic_reenable_crq_queue(adapter);
3249                 if (rc)
3250                         dev_err(dev, "Error after enable rc=%ld\n", rc);
3251                 adapter->migrated = false;
3252                 rc = ibmvnic_send_crq_init(adapter);
3253                 if (rc)
3254                         dev_err(dev, "Error sending init rc=%ld\n", rc);
3255         }
3256 }
3257
3258 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3259                                struct ibmvnic_adapter *adapter)
3260 {
3261         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3262         struct net_device *netdev = adapter->netdev;
3263         struct device *dev = &adapter->vdev->dev;
3264         long rc;
3265
3266         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3267                    ((unsigned long int *)crq)[0],
3268                    ((unsigned long int *)crq)[1]);
3269         switch (gen_crq->first) {
3270         case IBMVNIC_CRQ_INIT_RSP:
3271                 switch (gen_crq->cmd) {
3272                 case IBMVNIC_CRQ_INIT:
3273                         dev_info(dev, "Partner initialized\n");
3274                         /* Send back a response */
3275                         rc = ibmvnic_send_crq_init_complete(adapter);
3276                         if (!rc)
3277                                 schedule_work(&adapter->vnic_crq_init);
3278                         else
3279                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3280                         break;
3281                 case IBMVNIC_CRQ_INIT_COMPLETE:
3282                         dev_info(dev, "Partner initialization complete\n");
3283                         send_version_xchg(adapter);
3284                         break;
3285                 default:
3286                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3287                 }
3288                 return;
3289         case IBMVNIC_CRQ_XPORT_EVENT:
3290                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3291                         dev_info(dev, "Re-enabling adapter\n");
3292                         adapter->migrated = true;
3293                         schedule_work(&adapter->ibmvnic_xport);
3294                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3295                         dev_info(dev, "Backing device failover detected\n");
3296                         netif_carrier_off(netdev);
3297                         adapter->failover = true;
3298                 } else {
3299                         /* The adapter lost the connection */
3300                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3301                                 gen_crq->cmd);
3302                         schedule_work(&adapter->ibmvnic_xport);
3303                 }
3304                 return;
3305         case IBMVNIC_CRQ_CMD_RSP:
3306                 break;
3307         default:
3308                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3309                         gen_crq->first);
3310                 return;
3311         }
3312
3313         switch (gen_crq->cmd) {
3314         case VERSION_EXCHANGE_RSP:
3315                 rc = crq->version_exchange_rsp.rc.code;
3316                 if (rc) {
3317                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3318                         break;
3319                 }
3320                 dev_info(dev, "Partner protocol version is %d\n",
3321                          crq->version_exchange_rsp.version);
3322                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3323                     ibmvnic_version)
3324                         ibmvnic_version =
3325                             be16_to_cpu(crq->version_exchange_rsp.version);
3326                 send_cap_queries(adapter);
3327                 break;
3328         case QUERY_CAPABILITY_RSP:
3329                 handle_query_cap_rsp(crq, adapter);
3330                 break;
3331         case QUERY_MAP_RSP:
3332                 handle_query_map_rsp(crq, adapter);
3333                 break;
3334         case REQUEST_MAP_RSP:
3335                 handle_request_map_rsp(crq, adapter);
3336                 break;
3337         case REQUEST_UNMAP_RSP:
3338                 handle_request_unmap_rsp(crq, adapter);
3339                 break;
3340         case REQUEST_CAPABILITY_RSP:
3341                 handle_request_cap_rsp(crq, adapter);
3342                 break;
3343         case LOGIN_RSP:
3344                 netdev_dbg(netdev, "Got Login Response\n");
3345                 handle_login_rsp(crq, adapter);
3346                 break;
3347         case LOGICAL_LINK_STATE_RSP:
3348                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3349                 adapter->logical_link_state =
3350                     crq->logical_link_state_rsp.link_state;
3351                 break;
3352         case LINK_STATE_INDICATION:
3353                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3354                 adapter->phys_link_state =
3355                     crq->link_state_indication.phys_link_state;
3356                 adapter->logical_link_state =
3357                     crq->link_state_indication.logical_link_state;
3358                 break;
3359         case CHANGE_MAC_ADDR_RSP:
3360                 netdev_dbg(netdev, "Got MAC address change Response\n");
3361                 handle_change_mac_rsp(crq, adapter);
3362                 break;
3363         case ERROR_INDICATION:
3364                 netdev_dbg(netdev, "Got Error Indication\n");
3365                 handle_error_indication(crq, adapter);
3366                 break;
3367         case REQUEST_ERROR_RSP:
3368                 netdev_dbg(netdev, "Got Error Detail Response\n");
3369                 handle_error_info_rsp(crq, adapter);
3370                 break;
3371         case REQUEST_STATISTICS_RSP:
3372                 netdev_dbg(netdev, "Got Statistics Response\n");
3373                 complete(&adapter->stats_done);
3374                 break;
3375         case REQUEST_DUMP_SIZE_RSP:
3376                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3377                 handle_dump_size_rsp(crq, adapter);
3378                 break;
3379         case REQUEST_DUMP_RSP:
3380                 netdev_dbg(netdev, "Got Request Dump Response\n");
3381                 complete(&adapter->fw_done);
3382                 break;
3383         case QUERY_IP_OFFLOAD_RSP:
3384                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3385                 handle_query_ip_offload_rsp(adapter);
3386                 break;
3387         case MULTICAST_CTRL_RSP:
3388                 netdev_dbg(netdev, "Got multicast control Response\n");
3389                 break;
3390         case CONTROL_IP_OFFLOAD_RSP:
3391                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3392                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3393                                  sizeof(adapter->ip_offload_ctrl),
3394                                  DMA_TO_DEVICE);
3395                 /* We're done with the queries, perform the login */
3396                 send_login(adapter);
3397                 break;
3398         case REQUEST_RAS_COMP_NUM_RSP:
3399                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3400                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3401                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3402                         break;
3403                 }
3404                 adapter->ras_comp_num =
3405                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3406                 handle_request_ras_comp_num_rsp(crq, adapter);
3407                 break;
3408         case REQUEST_RAS_COMPS_RSP:
3409                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3410                 handle_request_ras_comps_rsp(crq, adapter);
3411                 break;
3412         case CONTROL_RAS_RSP:
3413                 netdev_dbg(netdev, "Got Control RAS Response\n");
3414                 handle_control_ras_rsp(crq, adapter);
3415                 break;
3416         case COLLECT_FW_TRACE_RSP:
3417                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3418                 complete(&adapter->fw_done);
3419                 break;
3420         default:
3421                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3422                            gen_crq->cmd);
3423         }
3424 }
3425
3426 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3427 {
3428         struct ibmvnic_adapter *adapter = instance;
3429         struct ibmvnic_crq_queue *queue = &adapter->crq;
3430         struct vio_dev *vdev = adapter->vdev;
3431         union ibmvnic_crq *crq;
3432         unsigned long flags;
3433         bool done = false;
3434
3435         spin_lock_irqsave(&queue->lock, flags);
3436         vio_disable_interrupts(vdev);
3437         while (!done) {
3438                 /* Pull all the valid messages off the CRQ */
3439                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3440                         ibmvnic_handle_crq(crq, adapter);
3441                         crq->generic.first = 0;
3442                 }
3443                 vio_enable_interrupts(vdev);
3444                 crq = ibmvnic_next_crq(adapter);
3445                 if (crq) {
3446                         vio_disable_interrupts(vdev);
3447                         ibmvnic_handle_crq(crq, adapter);
3448                         crq->generic.first = 0;
3449                 } else {
3450                         done = true;
3451                 }
3452         }
3453         spin_unlock_irqrestore(&queue->lock, flags);
3454         return IRQ_HANDLED;
3455 }
3456
3457 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3458 {
3459         struct vio_dev *vdev = adapter->vdev;
3460         int rc;
3461
3462         do {
3463                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3464         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3465
3466         if (rc)
3467                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3468
3469         return rc;
3470 }
3471
3472 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3473 {
3474         struct ibmvnic_crq_queue *crq = &adapter->crq;
3475         struct device *dev = &adapter->vdev->dev;
3476         struct vio_dev *vdev = adapter->vdev;
3477         int rc;
3478
3479         /* Close the CRQ */
3480         do {
3481                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3482         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3483
3484         /* Clean out the queue */
3485         memset(crq->msgs, 0, PAGE_SIZE);
3486         crq->cur = 0;
3487
3488         /* And re-open it again */
3489         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3490                                 crq->msg_token, PAGE_SIZE);
3491
3492         if (rc == H_CLOSED)
3493                 /* Adapter is good, but other end is not ready */
3494                 dev_warn(dev, "Partner adapter not ready\n");
3495         else if (rc != 0)
3496                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3497
3498         return rc;
3499 }
3500
3501 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3502 {
3503         struct ibmvnic_crq_queue *crq = &adapter->crq;
3504         struct vio_dev *vdev = adapter->vdev;
3505         long rc;
3506
3507         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3508         free_irq(vdev->irq, adapter);
3509         do {
3510                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3511         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3512
3513         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3514                          DMA_BIDIRECTIONAL);
3515         free_page((unsigned long)crq->msgs);
3516 }
3517
3518 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3519 {
3520         struct ibmvnic_crq_queue *crq = &adapter->crq;
3521         struct device *dev = &adapter->vdev->dev;
3522         struct vio_dev *vdev = adapter->vdev;
3523         int rc, retrc = -ENOMEM;
3524
3525         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3526         /* Should we allocate more than one page? */
3527
3528         if (!crq->msgs)
3529                 return -ENOMEM;
3530
3531         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3532         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3533                                         DMA_BIDIRECTIONAL);
3534         if (dma_mapping_error(dev, crq->msg_token))
3535                 goto map_failed;
3536
3537         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3538                                 crq->msg_token, PAGE_SIZE);
3539
3540         if (rc == H_RESOURCE)
3541                 /* maybe kexecing and resource is busy. try a reset */
3542                 rc = ibmvnic_reset_crq(adapter);
3543         retrc = rc;
3544
3545         if (rc == H_CLOSED) {
3546                 dev_warn(dev, "Partner adapter not ready\n");
3547         } else if (rc) {
3548                 dev_warn(dev, "Error %d opening adapter\n", rc);
3549                 goto reg_crq_failed;
3550         }
3551
3552         retrc = 0;
3553
3554         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3555         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3556                          adapter);
3557         if (rc) {
3558                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3559                         vdev->irq, rc);
3560                 goto req_irq_failed;
3561         }
3562
3563         rc = vio_enable_interrupts(vdev);
3564         if (rc) {
3565                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3566                 goto req_irq_failed;
3567         }
3568
3569         crq->cur = 0;
3570         spin_lock_init(&crq->lock);
3571
3572         return retrc;
3573
3574 req_irq_failed:
3575         do {
3576                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3577         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3578 reg_crq_failed:
3579         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3580 map_failed:
3581         free_page((unsigned long)crq->msgs);
3582         return retrc;
3583 }
3584
3585 /* debugfs for dump */
3586 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3587 {
3588         struct net_device *netdev = seq->private;
3589         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3590         struct device *dev = &adapter->vdev->dev;
3591         union ibmvnic_crq crq;
3592
3593         memset(&crq, 0, sizeof(crq));
3594         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3595         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3596         ibmvnic_send_crq(adapter, &crq);
3597
3598         init_completion(&adapter->fw_done);
3599         wait_for_completion(&adapter->fw_done);
3600
3601         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3602
3603         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3604                          DMA_BIDIRECTIONAL);
3605
3606         kfree(adapter->dump_data);
3607
3608         return 0;
3609 }
3610
3611 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3612 {
3613         return single_open(file, ibmvnic_dump_show, inode->i_private);
3614 }
3615
3616 static const struct file_operations ibmvnic_dump_ops = {
3617         .owner          = THIS_MODULE,
3618         .open           = ibmvnic_dump_open,
3619         .read           = seq_read,
3620         .llseek         = seq_lseek,
3621         .release        = single_release,
3622 };
3623
3624 static void handle_crq_init_rsp(struct work_struct *work)
3625 {
3626         struct ibmvnic_adapter *adapter = container_of(work,
3627                                                        struct ibmvnic_adapter,
3628                                                        vnic_crq_init);
3629         struct device *dev = &adapter->vdev->dev;
3630         struct net_device *netdev = adapter->netdev;
3631         unsigned long timeout = msecs_to_jiffies(30000);
3632         bool restart = false;
3633         int rc;
3634
3635         if (adapter->failover) {
3636                 release_sub_crqs(adapter);
3637                 if (netif_running(netdev)) {
3638                         netif_tx_disable(netdev);
3639                         ibmvnic_close(netdev);
3640                         restart = true;
3641                 }
3642         }
3643
3644         send_version_xchg(adapter);
3645         reinit_completion(&adapter->init_done);
3646         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3647                 dev_err(dev, "Passive init timeout\n");
3648                 goto task_failed;
3649         }
3650
3651         do {
3652                 if (adapter->renegotiate) {
3653                         adapter->renegotiate = false;
3654                         release_sub_crqs_no_irqs(adapter);
3655                         send_cap_queries(adapter);
3656
3657                         reinit_completion(&adapter->init_done);
3658                         if (!wait_for_completion_timeout(&adapter->init_done,
3659                                                          timeout)) {
3660                                 dev_err(dev, "Passive init timeout\n");
3661                                 goto task_failed;
3662                         }
3663                 }
3664         } while (adapter->renegotiate);
3665         rc = init_sub_crq_irqs(adapter);
3666
3667         if (rc)
3668                 goto task_failed;
3669
3670         netdev->real_num_tx_queues = adapter->req_tx_queues;
3671         netdev->mtu = adapter->req_mtu;
3672
3673         if (adapter->failover) {
3674                 adapter->failover = false;
3675                 if (restart) {
3676                         rc = ibmvnic_open(netdev);
3677                         if (rc)
3678                                 goto restart_failed;
3679                 }
3680                 netif_carrier_on(netdev);
3681                 return;
3682         }
3683
3684         rc = register_netdev(netdev);
3685         if (rc) {
3686                 dev_err(dev,
3687                         "failed to register netdev rc=%d\n", rc);
3688                 goto register_failed;
3689         }
3690         dev_info(dev, "ibmvnic registered\n");
3691
3692         return;
3693
3694 restart_failed:
3695         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3696 register_failed:
3697         release_sub_crqs(adapter);
3698 task_failed:
3699         dev_err(dev, "Passive initialization was not successful\n");
3700 }
3701
3702 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3703 {
3704         unsigned long timeout = msecs_to_jiffies(30000);
3705         struct ibmvnic_adapter *adapter;
3706         struct net_device *netdev;
3707         unsigned char *mac_addr_p;
3708         struct dentry *ent;
3709         char buf[16]; /* debugfs name buf */
3710         int rc;
3711
3712         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3713                 dev->unit_address);
3714
3715         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3716                                                         VETH_MAC_ADDR, NULL);
3717         if (!mac_addr_p) {
3718                 dev_err(&dev->dev,
3719                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3720                         __FILE__, __LINE__);
3721                 return 0;
3722         }
3723
3724         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3725                                    IBMVNIC_MAX_TX_QUEUES);
3726         if (!netdev)
3727                 return -ENOMEM;
3728
3729         adapter = netdev_priv(netdev);
3730         dev_set_drvdata(&dev->dev, netdev);
3731         adapter->vdev = dev;
3732         adapter->netdev = netdev;
3733         adapter->failover = false;
3734
3735         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3736         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3737         netdev->irq = dev->irq;
3738         netdev->netdev_ops = &ibmvnic_netdev_ops;
3739         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3740         SET_NETDEV_DEV(netdev, &dev->dev);
3741
3742         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3743         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3744
3745         spin_lock_init(&adapter->stats_lock);
3746
3747         rc = ibmvnic_init_crq_queue(adapter);
3748         if (rc) {
3749                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3750                 goto free_netdev;
3751         }
3752
3753         INIT_LIST_HEAD(&adapter->errors);
3754         INIT_LIST_HEAD(&adapter->inflight);
3755         spin_lock_init(&adapter->error_list_lock);
3756         spin_lock_init(&adapter->inflight_lock);
3757
3758         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3759                                               sizeof(struct ibmvnic_statistics),
3760                                               DMA_FROM_DEVICE);
3761         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3762                 if (!firmware_has_feature(FW_FEATURE_CMO))
3763                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3764                 rc = -ENOMEM;
3765                 goto free_crq;
3766         }
3767
3768         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3769         ent = debugfs_create_dir(buf, NULL);
3770         if (!ent || IS_ERR(ent)) {
3771                 dev_info(&dev->dev, "debugfs create directory failed\n");
3772                 adapter->debugfs_dir = NULL;
3773         } else {
3774                 adapter->debugfs_dir = ent;
3775                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3776                                           netdev, &ibmvnic_dump_ops);
3777                 if (!ent || IS_ERR(ent)) {
3778                         dev_info(&dev->dev,
3779                                  "debugfs create dump file failed\n");
3780                         adapter->debugfs_dump = NULL;
3781                 } else {
3782                         adapter->debugfs_dump = ent;
3783                 }
3784         }
3785         ibmvnic_send_crq_init(adapter);
3786
3787         init_completion(&adapter->init_done);
3788         if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3789                 return 0;
3790
3791         do {
3792                 if (adapter->renegotiate) {
3793                         adapter->renegotiate = false;
3794                         release_sub_crqs_no_irqs(adapter);
3795                         send_cap_queries(adapter);
3796
3797                         reinit_completion(&adapter->init_done);
3798                         if (!wait_for_completion_timeout(&adapter->init_done,
3799                                                          timeout))
3800                                 return 0;
3801                 }
3802         } while (adapter->renegotiate);
3803
3804         rc = init_sub_crq_irqs(adapter);
3805         if (rc) {
3806                 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3807                 goto free_debugfs;
3808         }
3809
3810         netdev->real_num_tx_queues = adapter->req_tx_queues;
3811         netdev->mtu = adapter->req_mtu;
3812
3813         rc = register_netdev(netdev);
3814         if (rc) {
3815                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3816                 goto free_sub_crqs;
3817         }
3818         dev_info(&dev->dev, "ibmvnic registered\n");
3819
3820         return 0;
3821
3822 free_sub_crqs:
3823         release_sub_crqs(adapter);
3824 free_debugfs:
3825         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3826                 debugfs_remove_recursive(adapter->debugfs_dir);
3827 free_crq:
3828         ibmvnic_release_crq_queue(adapter);
3829 free_netdev:
3830         free_netdev(netdev);
3831         return rc;
3832 }
3833
3834 static int ibmvnic_remove(struct vio_dev *dev)
3835 {
3836         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3837         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3838
3839         unregister_netdev(netdev);
3840
3841         release_sub_crqs(adapter);
3842
3843         ibmvnic_release_crq_queue(adapter);
3844
3845         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3846                 debugfs_remove_recursive(adapter->debugfs_dir);
3847
3848         if (adapter->ras_comps)
3849                 dma_free_coherent(&dev->dev,
3850                                   adapter->ras_comp_num *
3851                                   sizeof(struct ibmvnic_fw_component),
3852                                   adapter->ras_comps, adapter->ras_comps_tok);
3853
3854         kfree(adapter->ras_comp_int);
3855
3856         free_netdev(netdev);
3857         dev_set_drvdata(&dev->dev, NULL);
3858
3859         return 0;
3860 }
3861
3862 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3863 {
3864         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3865         struct ibmvnic_adapter *adapter;
3866         struct iommu_table *tbl;
3867         unsigned long ret = 0;
3868         int i;
3869
3870         tbl = get_iommu_table_base(&vdev->dev);
3871
3872         /* netdev inits at probe time along with the structures we need below*/
3873         if (!netdev)
3874                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3875
3876         adapter = netdev_priv(netdev);
3877
3878         ret += PAGE_SIZE; /* the crq message queue */
3879         ret += adapter->bounce_buffer_size;
3880         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3881
3882         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3883                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3884
3885         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3886              i++)
3887                 ret += adapter->rx_pool[i].size *
3888                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3889
3890         return ret;
3891 }
3892
3893 static int ibmvnic_resume(struct device *dev)
3894 {
3895         struct net_device *netdev = dev_get_drvdata(dev);
3896         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3897         int i;
3898
3899         /* kick the interrupt handlers just in case we lost an interrupt */
3900         for (i = 0; i < adapter->req_rx_queues; i++)
3901                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3902                                      adapter->rx_scrq[i]);
3903
3904         return 0;
3905 }
3906
3907 static struct vio_device_id ibmvnic_device_table[] = {
3908         {"network", "IBM,vnic"},
3909         {"", "" }
3910 };
3911 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3912
3913 static const struct dev_pm_ops ibmvnic_pm_ops = {
3914         .resume = ibmvnic_resume
3915 };
3916
3917 static struct vio_driver ibmvnic_driver = {
3918         .id_table       = ibmvnic_device_table,
3919         .probe          = ibmvnic_probe,
3920         .remove         = ibmvnic_remove,
3921         .get_desired_dma = ibmvnic_get_desired_dma,
3922         .name           = ibmvnic_driver_name,
3923         .pm             = &ibmvnic_pm_ops,
3924 };
3925
3926 /* module functions */
3927 static int __init ibmvnic_module_init(void)
3928 {
3929         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3930                 IBMVNIC_DRIVER_VERSION);
3931
3932         return vio_register_driver(&ibmvnic_driver);
3933 }
3934
3935 static void __exit ibmvnic_module_exit(void)
3936 {
3937         vio_unregister_driver(&ibmvnic_driver);
3938 }
3939
3940 module_init(ibmvnic_module_init);
3941 module_exit(ibmvnic_module_exit);