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/workqueue.h>
  78
  79 #include "ibmvnic.h"
  80
  81 static const char ibmvnic_driver_name[] = "ibmvnic";
  82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  83
  84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  88
  89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  90 static int ibmvnic_remove(struct vio_dev *);
  91 static void release_sub_crqs(struct ibmvnic_adapter *);
  92 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *);
  93 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  94 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  95 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  96 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  97 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  98                        union sub_crq *sub_crq);
  99 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
 100 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 101 static int enable_scrq_irq(struct ibmvnic_adapter *,
 102                            struct ibmvnic_sub_crq_queue *);
 103 static int disable_scrq_irq(struct ibmvnic_adapter *,
 104                             struct ibmvnic_sub_crq_queue *);
 105 static int pending_scrq(struct ibmvnic_adapter *,
 106                         struct ibmvnic_sub_crq_queue *);
 107 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 108                                         struct ibmvnic_sub_crq_queue *);
 109 static int ibmvnic_poll(struct napi_struct *napi, int data);
 110 static void send_map_query(struct ibmvnic_adapter *adapter);
 111 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 112 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 113
 114 struct ibmvnic_stat {
 115         char name[ETH_GSTRING_LEN];
 116         int offset;
 117 };
 118
 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 120                              offsetof(struct ibmvnic_statistics, stat))
 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 122
 123 static const struct ibmvnic_stat ibmvnic_stats[] = {
 124         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 125         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 126         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 127         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 128         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 129         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 130         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 131         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 132         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 133         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 134         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 135         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 136         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 137         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 138         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 139         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 140         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 141         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 142         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 143         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 144         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 145         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 146 };
 147
 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 149                           unsigned long length, unsigned long *number,
 150                           unsigned long *irq)
 151 {
 152         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 153         long rc;
 154
 155         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 156         *number = retbuf[0];
 157         *irq = retbuf[1];
 158
 159         return rc;
 160 }
 161
 162 /* net_device_ops functions */
 163
 164 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 165                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 166                          int buff_size, int active)
 167 {
 168         netdev_dbg(adapter->netdev,
 169                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 170                    index, num, buff_size);
 171         rx_pool->size = num;
 172         rx_pool->index = index;
 173         rx_pool->buff_size = buff_size;
 174         rx_pool->active = active;
 175 }
 176
 177 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 178                                 struct ibmvnic_long_term_buff *ltb, int size)
 179 {
 180         struct device *dev = &adapter->vdev->dev;
 181
 182         ltb->size = size;
 183         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 184                                        GFP_KERNEL);
 185
 186         if (!ltb->buff) {
 187                 dev_err(dev, "Couldn't alloc long term buffer\n");
 188                 return -ENOMEM;
 189         }
 190         ltb->map_id = adapter->map_id;
 191         adapter->map_id++;
 192
 193         init_completion(&adapter->fw_done);
 194         send_request_map(adapter, ltb->addr,
 195                          ltb->size, ltb->map_id);
 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_disable(&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 void ibmvnic_tx_timeout(struct net_device *dev)
 906 {
 907         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 908         int rc;
 909
 910         /* Adapter timed out, resetting it */
 911         release_sub_crqs(adapter);
 912         rc = ibmvnic_reset_crq(adapter);
 913         if (rc)
 914                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 915         else
 916                 ibmvnic_send_crq_init(adapter);
 917 }
 918
 919 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 920                                   struct ibmvnic_rx_buff *rx_buff)
 921 {
 922         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 923
 924         rx_buff->skb = NULL;
 925
 926         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 927         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 928
 929         atomic_dec(&pool->available);
 930 }
 931
 932 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 933 {
 934         struct net_device *netdev = napi->dev;
 935         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 936         int scrq_num = (int)(napi - adapter->napi);
 937         int frames_processed = 0;
 938 restart_poll:
 939         while (frames_processed < budget) {
 940                 struct sk_buff *skb;
 941                 struct ibmvnic_rx_buff *rx_buff;
 942                 union sub_crq *next;
 943                 u32 length;
 944                 u16 offset;
 945                 u8 flags = 0;
 946
 947                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 948                         break;
 949                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 950                 rx_buff =
 951                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 952                                                           rx_comp.correlator);
 953                 /* do error checking */
 954                 if (next->rx_comp.rc) {
 955                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 956                         /* free the entry */
 957                         next->rx_comp.first = 0;
 958                         remove_buff_from_pool(adapter, rx_buff);
 959                         break;
 960                 }
 961
 962                 length = be32_to_cpu(next->rx_comp.len);
 963                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 964                 flags = next->rx_comp.flags;
 965                 skb = rx_buff->skb;
 966                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 967                                         length);
 968                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 969                 /* free the entry */
 970                 next->rx_comp.first = 0;
 971                 remove_buff_from_pool(adapter, rx_buff);
 972
 973                 skb_put(skb, length);
 974                 skb->protocol = eth_type_trans(skb, netdev);
 975
 976                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 977                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 978                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 979                 }
 980
 981                 length = skb->len;
 982                 napi_gro_receive(napi, skb); /* send it up */
 983                 netdev->stats.rx_packets++;
 984                 netdev->stats.rx_bytes += length;
 985                 frames_processed++;
 986         }
 987         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 988
 989         if (frames_processed < budget) {
 990                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
 991                 napi_complete_done(napi, frames_processed);
 992                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
 993                     napi_reschedule(napi)) {
 994                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
 995                         goto restart_poll;
 996                 }
 997         }
 998         return frames_processed;
 999 }
1000
1001 #ifdef CONFIG_NET_POLL_CONTROLLER
1002 static void ibmvnic_netpoll_controller(struct net_device *dev)
1003 {
1004         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1005         int i;
1006
1007         replenish_pools(netdev_priv(dev));
1008         for (i = 0; i < adapter->req_rx_queues; i++)
1009                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1010                                      adapter->rx_scrq[i]);
1011 }
1012 #endif
1013
1014 static const struct net_device_ops ibmvnic_netdev_ops = {
1015         .ndo_open               = ibmvnic_open,
1016         .ndo_stop               = ibmvnic_close,
1017         .ndo_start_xmit         = ibmvnic_xmit,
1018         .ndo_set_rx_mode        = ibmvnic_set_multi,
1019         .ndo_set_mac_address    = ibmvnic_set_mac,
1020         .ndo_validate_addr      = eth_validate_addr,
1021         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1022 #ifdef CONFIG_NET_POLL_CONTROLLER
1023         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1024 #endif
1025 };
1026
1027 /* ethtool functions */
1028
1029 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1030                                       struct ethtool_link_ksettings *cmd)
1031 {
1032         u32 supported, advertising;
1033
1034         supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1035                           SUPPORTED_FIBRE);
1036         advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1037                             ADVERTISED_FIBRE);
1038         cmd->base.speed = SPEED_1000;
1039         cmd->base.duplex = DUPLEX_FULL;
1040         cmd->base.port = PORT_FIBRE;
1041         cmd->base.phy_address = 0;
1042         cmd->base.autoneg = AUTONEG_ENABLE;
1043
1044         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1045                                                 supported);
1046         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1047                                                 advertising);
1048
1049         return 0;
1050 }
1051
1052 static void ibmvnic_get_drvinfo(struct net_device *dev,
1053                                 struct ethtool_drvinfo *info)
1054 {
1055         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1056         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1057 }
1058
1059 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1060 {
1061         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1062
1063         return adapter->msg_enable;
1064 }
1065
1066 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1067 {
1068         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1069
1070         adapter->msg_enable = data;
1071 }
1072
1073 static u32 ibmvnic_get_link(struct net_device *netdev)
1074 {
1075         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1076
1077         /* Don't need to send a query because we request a logical link up at
1078          * init and then we wait for link state indications
1079          */
1080         return adapter->logical_link_state;
1081 }
1082
1083 static void ibmvnic_get_ringparam(struct net_device *netdev,
1084                                   struct ethtool_ringparam *ring)
1085 {
1086         ring->rx_max_pending = 0;
1087         ring->tx_max_pending = 0;
1088         ring->rx_mini_max_pending = 0;
1089         ring->rx_jumbo_max_pending = 0;
1090         ring->rx_pending = 0;
1091         ring->tx_pending = 0;
1092         ring->rx_mini_pending = 0;
1093         ring->rx_jumbo_pending = 0;
1094 }
1095
1096 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1097 {
1098         int i;
1099
1100         if (stringset != ETH_SS_STATS)
1101                 return;
1102
1103         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1104                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1105 }
1106
1107 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1108 {
1109         switch (sset) {
1110         case ETH_SS_STATS:
1111                 return ARRAY_SIZE(ibmvnic_stats);
1112         default:
1113                 return -EOPNOTSUPP;
1114         }
1115 }
1116
1117 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1118                                       struct ethtool_stats *stats, u64 *data)
1119 {
1120         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1121         union ibmvnic_crq crq;
1122         int i;
1123
1124         memset(&crq, 0, sizeof(crq));
1125         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1126         crq.request_statistics.cmd = REQUEST_STATISTICS;
1127         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1128         crq.request_statistics.len =
1129             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1130
1131         /* Wait for data to be written */
1132         init_completion(&adapter->stats_done);
1133         ibmvnic_send_crq(adapter, &crq);
1134         wait_for_completion(&adapter->stats_done);
1135
1136         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1137                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1138 }
1139
1140 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1141         .get_drvinfo            = ibmvnic_get_drvinfo,
1142         .get_msglevel           = ibmvnic_get_msglevel,
1143         .set_msglevel           = ibmvnic_set_msglevel,
1144         .get_link               = ibmvnic_get_link,
1145         .get_ringparam          = ibmvnic_get_ringparam,
1146         .get_strings            = ibmvnic_get_strings,
1147         .get_sset_count         = ibmvnic_get_sset_count,
1148         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1149         .get_link_ksettings     = ibmvnic_get_link_ksettings,
1150 };
1151
1152 /* Routines for managing CRQs/sCRQs  */
1153
1154 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1155                                   struct ibmvnic_sub_crq_queue *scrq)
1156 {
1157         struct device *dev = &adapter->vdev->dev;
1158         long rc;
1159
1160         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1161
1162         /* Close the sub-crqs */
1163         do {
1164                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1165                                         adapter->vdev->unit_address,
1166                                         scrq->crq_num);
1167         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1168
1169         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1170                          DMA_BIDIRECTIONAL);
1171         free_pages((unsigned long)scrq->msgs, 2);
1172         kfree(scrq);
1173 }
1174
1175 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1176                                                         *adapter)
1177 {
1178         struct device *dev = &adapter->vdev->dev;
1179         struct ibmvnic_sub_crq_queue *scrq;
1180         int rc;
1181
1182         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1183         if (!scrq)
1184                 return NULL;
1185
1186         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2);
1187         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1188         if (!scrq->msgs) {
1189                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1190                 goto zero_page_failed;
1191         }
1192
1193         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1194                                          DMA_BIDIRECTIONAL);
1195         if (dma_mapping_error(dev, scrq->msg_token)) {
1196                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1197                 goto map_failed;
1198         }
1199
1200         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1201                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1202
1203         if (rc == H_RESOURCE)
1204                 rc = ibmvnic_reset_crq(adapter);
1205
1206         if (rc == H_CLOSED) {
1207                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1208         } else if (rc) {
1209                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1210                 goto reg_failed;
1211         }
1212
1213         scrq->adapter = adapter;
1214         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1215         scrq->cur = 0;
1216         scrq->rx_skb_top = NULL;
1217         spin_lock_init(&scrq->lock);
1218
1219         netdev_dbg(adapter->netdev,
1220                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1221                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1222
1223         return scrq;
1224
1225 reg_failed:
1226         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1227                          DMA_BIDIRECTIONAL);
1228 map_failed:
1229         free_pages((unsigned long)scrq->msgs, 2);
1230 zero_page_failed:
1231         kfree(scrq);
1232
1233         return NULL;
1234 }
1235
1236 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1237 {
1238         int i;
1239
1240         if (adapter->tx_scrq) {
1241                 for (i = 0; i < adapter->req_tx_queues; i++)
1242                         if (adapter->tx_scrq[i]) {
1243                                 free_irq(adapter->tx_scrq[i]->irq,
1244                                          adapter->tx_scrq[i]);
1245                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1246                                 release_sub_crq_queue(adapter,
1247                                                       adapter->tx_scrq[i]);
1248                         }
1249                 adapter->tx_scrq = NULL;
1250         }
1251
1252         if (adapter->rx_scrq) {
1253                 for (i = 0; i < adapter->req_rx_queues; i++)
1254                         if (adapter->rx_scrq[i]) {
1255                                 free_irq(adapter->rx_scrq[i]->irq,
1256                                          adapter->rx_scrq[i]);
1257                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1258                                 release_sub_crq_queue(adapter,
1259                                                       adapter->rx_scrq[i]);
1260                         }
1261                 adapter->rx_scrq = NULL;
1262         }
1263 }
1264
1265 static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter)
1266 {
1267         int i;
1268
1269         if (adapter->tx_scrq) {
1270                 for (i = 0; i < adapter->req_tx_queues; i++)
1271                         if (adapter->tx_scrq[i])
1272                                 release_sub_crq_queue(adapter,
1273                                                       adapter->tx_scrq[i]);
1274                 adapter->tx_scrq = NULL;
1275         }
1276
1277         if (adapter->rx_scrq) {
1278                 for (i = 0; i < adapter->req_rx_queues; i++)
1279                         if (adapter->rx_scrq[i])
1280                                 release_sub_crq_queue(adapter,
1281                                                       adapter->rx_scrq[i]);
1282                 adapter->rx_scrq = NULL;
1283         }
1284 }
1285
1286 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1287                             struct ibmvnic_sub_crq_queue *scrq)
1288 {
1289         struct device *dev = &adapter->vdev->dev;
1290         unsigned long rc;
1291
1292         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1293                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1294         if (rc)
1295                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1296                         scrq->hw_irq, rc);
1297         return rc;
1298 }
1299
1300 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1301                            struct ibmvnic_sub_crq_queue *scrq)
1302 {
1303         struct device *dev = &adapter->vdev->dev;
1304         unsigned long rc;
1305
1306         if (scrq->hw_irq > 0x100000000ULL) {
1307                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1308                 return 1;
1309         }
1310
1311         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1312                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1313         if (rc)
1314                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1315                         scrq->hw_irq, rc);
1316         return rc;
1317 }
1318
1319 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1320                                struct ibmvnic_sub_crq_queue *scrq)
1321 {
1322         struct device *dev = &adapter->vdev->dev;
1323         struct ibmvnic_tx_buff *txbuff;
1324         union sub_crq *next;
1325         int index;
1326         int i, j;
1327         u8 first;
1328
1329 restart_loop:
1330         while (pending_scrq(adapter, scrq)) {
1331                 unsigned int pool = scrq->pool_index;
1332
1333                 next = ibmvnic_next_scrq(adapter, scrq);
1334                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1335                         if (next->tx_comp.rcs[i]) {
1336                                 dev_err(dev, "tx error %x\n",
1337                                         next->tx_comp.rcs[i]);
1338                                 continue;
1339                         }
1340                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1341                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1342
1343                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1344                                 if (!txbuff->data_dma[j])
1345                                         continue;
1346
1347                                 txbuff->data_dma[j] = 0;
1348                                 txbuff->used_bounce = false;
1349                         }
1350                         /* if sub_crq was sent indirectly */
1351                         first = txbuff->indir_arr[0].generic.first;
1352                         if (first == IBMVNIC_CRQ_CMD) {
1353                                 dma_unmap_single(dev, txbuff->indir_dma,
1354                                                  sizeof(txbuff->indir_arr),
1355                                                  DMA_TO_DEVICE);
1356                         }
1357
1358                         if (txbuff->last_frag)
1359                                 dev_kfree_skb_any(txbuff->skb);
1360
1361                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1362                                                      producer_index] = index;
1363                         adapter->tx_pool[pool].producer_index =
1364                             (adapter->tx_pool[pool].producer_index + 1) %
1365                             adapter->max_tx_entries_per_subcrq;
1366                 }
1367                 /* remove tx_comp scrq*/
1368                 next->tx_comp.first = 0;
1369         }
1370
1371         enable_scrq_irq(adapter, scrq);
1372
1373         if (pending_scrq(adapter, scrq)) {
1374                 disable_scrq_irq(adapter, scrq);
1375                 goto restart_loop;
1376         }
1377
1378         return 0;
1379 }
1380
1381 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1382 {
1383         struct ibmvnic_sub_crq_queue *scrq = instance;
1384         struct ibmvnic_adapter *adapter = scrq->adapter;
1385
1386         disable_scrq_irq(adapter, scrq);
1387         ibmvnic_complete_tx(adapter, scrq);
1388
1389         return IRQ_HANDLED;
1390 }
1391
1392 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1393 {
1394         struct ibmvnic_sub_crq_queue *scrq = instance;
1395         struct ibmvnic_adapter *adapter = scrq->adapter;
1396
1397         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1398                 disable_scrq_irq(adapter, scrq);
1399                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1400         }
1401
1402         return IRQ_HANDLED;
1403 }
1404
1405 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
1406 {
1407         struct device *dev = &adapter->vdev->dev;
1408         struct ibmvnic_sub_crq_queue *scrq;
1409         int i = 0, j = 0;
1410         int rc = 0;
1411
1412         for (i = 0; i < adapter->req_tx_queues; i++) {
1413                 scrq = adapter->tx_scrq[i];
1414                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1415
1416                 if (!scrq->irq) {
1417                         rc = -EINVAL;
1418                         dev_err(dev, "Error mapping irq\n");
1419                         goto req_tx_irq_failed;
1420                 }
1421
1422                 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
1423                                  0, "ibmvnic_tx", scrq);
1424
1425                 if (rc) {
1426                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1427                                 scrq->irq, rc);
1428                         irq_dispose_mapping(scrq->irq);
1429                         goto req_rx_irq_failed;
1430                 }
1431         }
1432
1433         for (i = 0; i < adapter->req_rx_queues; i++) {
1434                 scrq = adapter->rx_scrq[i];
1435                 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1436                 if (!scrq->irq) {
1437                         rc = -EINVAL;
1438                         dev_err(dev, "Error mapping irq\n");
1439                         goto req_rx_irq_failed;
1440                 }
1441                 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
1442                                  0, "ibmvnic_rx", scrq);
1443                 if (rc) {
1444                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1445                                 scrq->irq, rc);
1446                         irq_dispose_mapping(scrq->irq);
1447                         goto req_rx_irq_failed;
1448                 }
1449         }
1450         return rc;
1451
1452 req_rx_irq_failed:
1453         for (j = 0; j < i; j++) {
1454                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1455                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1456         }
1457         i = adapter->req_tx_queues;
1458 req_tx_irq_failed:
1459         for (j = 0; j < i; j++) {
1460                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1461                 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
1462         }
1463         release_sub_crqs_no_irqs(adapter);
1464         return rc;
1465 }
1466
1467 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1468 {
1469         struct device *dev = &adapter->vdev->dev;
1470         struct ibmvnic_sub_crq_queue **allqueues;
1471         int registered_queues = 0;
1472         union ibmvnic_crq crq;
1473         int total_queues;
1474         int more = 0;
1475         int i;
1476
1477         if (!retry) {
1478                 /* Sub-CRQ entries are 32 byte long */
1479                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1480
1481                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1482                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1483                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1484                         goto allqueues_failed;
1485                 }
1486
1487                 /* Get the minimum between the queried max and the entries
1488                  * that fit in our PAGE_SIZE
1489                  */
1490                 adapter->req_tx_entries_per_subcrq =
1491                     adapter->max_tx_entries_per_subcrq > entries_page ?
1492                     entries_page : adapter->max_tx_entries_per_subcrq;
1493                 adapter->req_rx_add_entries_per_subcrq =
1494                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1495                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1496
1497                 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues;
1498                 adapter->req_rx_queues = adapter->opt_rx_comp_queues;
1499                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1500
1501                 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
1502         }
1503
1504         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1505
1506         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1507         if (!allqueues)
1508                 goto allqueues_failed;
1509
1510         for (i = 0; i < total_queues; i++) {
1511                 allqueues[i] = init_sub_crq_queue(adapter);
1512                 if (!allqueues[i]) {
1513                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1514                         break;
1515                 }
1516                 registered_queues++;
1517         }
1518
1519         /* Make sure we were able to register the minimum number of queues */
1520         if (registered_queues <
1521             adapter->min_tx_queues + adapter->min_rx_queues) {
1522                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1523                 goto tx_failed;
1524         }
1525
1526         /* Distribute the failed allocated queues*/
1527         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1528                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1529                 switch (i % 3) {
1530                 case 0:
1531                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1532                                 adapter->req_rx_queues--;
1533                         else
1534                                 more++;
1535                         break;
1536                 case 1:
1537                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1538                                 adapter->req_tx_queues--;
1539                         else
1540                                 more++;
1541                         break;
1542                 }
1543         }
1544
1545         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1546                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1547         if (!adapter->tx_scrq)
1548                 goto tx_failed;
1549
1550         for (i = 0; i < adapter->req_tx_queues; i++) {
1551                 adapter->tx_scrq[i] = allqueues[i];
1552                 adapter->tx_scrq[i]->pool_index = i;
1553         }
1554
1555         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1556                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1557         if (!adapter->rx_scrq)
1558                 goto rx_failed;
1559
1560         for (i = 0; i < adapter->req_rx_queues; i++) {
1561                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1562                 adapter->rx_scrq[i]->scrq_num = i;
1563         }
1564
1565         memset(&crq, 0, sizeof(crq));
1566         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1567         crq.request_capability.cmd = REQUEST_CAPABILITY;
1568
1569         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1570         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1571         atomic_inc(&adapter->running_cap_crqs);
1572         ibmvnic_send_crq(adapter, &crq);
1573
1574         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1575         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1576         atomic_inc(&adapter->running_cap_crqs);
1577         ibmvnic_send_crq(adapter, &crq);
1578
1579         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1580         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1581         atomic_inc(&adapter->running_cap_crqs);
1582         ibmvnic_send_crq(adapter, &crq);
1583
1584         crq.request_capability.capability =
1585             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1586         crq.request_capability.number =
1587             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1588         atomic_inc(&adapter->running_cap_crqs);
1589         ibmvnic_send_crq(adapter, &crq);
1590
1591         crq.request_capability.capability =
1592             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1593         crq.request_capability.number =
1594             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1595         atomic_inc(&adapter->running_cap_crqs);
1596         ibmvnic_send_crq(adapter, &crq);
1597
1598         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1599         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1600         atomic_inc(&adapter->running_cap_crqs);
1601         ibmvnic_send_crq(adapter, &crq);
1602
1603         if (adapter->netdev->flags & IFF_PROMISC) {
1604                 if (adapter->promisc_supported) {
1605                         crq.request_capability.capability =
1606                             cpu_to_be16(PROMISC_REQUESTED);
1607                         crq.request_capability.number = cpu_to_be64(1);
1608                         atomic_inc(&adapter->running_cap_crqs);
1609                         ibmvnic_send_crq(adapter, &crq);
1610                 }
1611         } else {
1612                 crq.request_capability.capability =
1613                     cpu_to_be16(PROMISC_REQUESTED);
1614                 crq.request_capability.number = cpu_to_be64(0);
1615                 atomic_inc(&adapter->running_cap_crqs);
1616                 ibmvnic_send_crq(adapter, &crq);
1617         }
1618
1619         kfree(allqueues);
1620
1621         return;
1622
1623 rx_failed:
1624         kfree(adapter->tx_scrq);
1625         adapter->tx_scrq = NULL;
1626 tx_failed:
1627         for (i = 0; i < registered_queues; i++)
1628                 release_sub_crq_queue(adapter, allqueues[i]);
1629         kfree(allqueues);
1630 allqueues_failed:
1631         ibmvnic_remove(adapter->vdev);
1632 }
1633
1634 static int pending_scrq(struct ibmvnic_adapter *adapter,
1635                         struct ibmvnic_sub_crq_queue *scrq)
1636 {
1637         union sub_crq *entry = &scrq->msgs[scrq->cur];
1638
1639         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1640                 return 1;
1641         else
1642                 return 0;
1643 }
1644
1645 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1646                                         struct ibmvnic_sub_crq_queue *scrq)
1647 {
1648         union sub_crq *entry;
1649         unsigned long flags;
1650
1651         spin_lock_irqsave(&scrq->lock, flags);
1652         entry = &scrq->msgs[scrq->cur];
1653         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1654                 if (++scrq->cur == scrq->size)
1655                         scrq->cur = 0;
1656         } else {
1657                 entry = NULL;
1658         }
1659         spin_unlock_irqrestore(&scrq->lock, flags);
1660
1661         return entry;
1662 }
1663
1664 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1665 {
1666         struct ibmvnic_crq_queue *queue = &adapter->crq;
1667         union ibmvnic_crq *crq;
1668
1669         crq = &queue->msgs[queue->cur];
1670         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1671                 if (++queue->cur == queue->size)
1672                         queue->cur = 0;
1673         } else {
1674                 crq = NULL;
1675         }
1676
1677         return crq;
1678 }
1679
1680 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1681                        union sub_crq *sub_crq)
1682 {
1683         unsigned int ua = adapter->vdev->unit_address;
1684         struct device *dev = &adapter->vdev->dev;
1685         u64 *u64_crq = (u64 *)sub_crq;
1686         int rc;
1687
1688         netdev_dbg(adapter->netdev,
1689                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1690                    (unsigned long int)cpu_to_be64(remote_handle),
1691                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1692                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1693                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1694                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1695
1696         /* Make sure the hypervisor sees the complete request */
1697         mb();
1698
1699         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1700                                 cpu_to_be64(remote_handle),
1701                                 cpu_to_be64(u64_crq[0]),
1702                                 cpu_to_be64(u64_crq[1]),
1703                                 cpu_to_be64(u64_crq[2]),
1704                                 cpu_to_be64(u64_crq[3]));
1705
1706         if (rc) {
1707                 if (rc == H_CLOSED)
1708                         dev_warn(dev, "CRQ Queue closed\n");
1709                 dev_err(dev, "Send error (rc=%d)\n", rc);
1710         }
1711
1712         return rc;
1713 }
1714
1715 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1716                                 u64 remote_handle, u64 ioba, u64 num_entries)
1717 {
1718         unsigned int ua = adapter->vdev->unit_address;
1719         struct device *dev = &adapter->vdev->dev;
1720         int rc;
1721
1722         /* Make sure the hypervisor sees the complete request */
1723         mb();
1724         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1725                                 cpu_to_be64(remote_handle),
1726                                 ioba, num_entries);
1727
1728         if (rc) {
1729                 if (rc == H_CLOSED)
1730                         dev_warn(dev, "CRQ Queue closed\n");
1731                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1732         }
1733
1734         return rc;
1735 }
1736
1737 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1738                             union ibmvnic_crq *crq)
1739 {
1740         unsigned int ua = adapter->vdev->unit_address;
1741         struct device *dev = &adapter->vdev->dev;
1742         u64 *u64_crq = (u64 *)crq;
1743         int rc;
1744
1745         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1746                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1747                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1748
1749         /* Make sure the hypervisor sees the complete request */
1750         mb();
1751
1752         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1753                                 cpu_to_be64(u64_crq[0]),
1754                                 cpu_to_be64(u64_crq[1]));
1755
1756         if (rc) {
1757                 if (rc == H_CLOSED)
1758                         dev_warn(dev, "CRQ Queue closed\n");
1759                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1760         }
1761
1762         return rc;
1763 }
1764
1765 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1766 {
1767         union ibmvnic_crq crq;
1768
1769         memset(&crq, 0, sizeof(crq));
1770         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1771         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1772         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1773
1774         return ibmvnic_send_crq(adapter, &crq);
1775 }
1776
1777 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1778 {
1779         union ibmvnic_crq crq;
1780
1781         memset(&crq, 0, sizeof(crq));
1782         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1783         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1784         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1785
1786         return ibmvnic_send_crq(adapter, &crq);
1787 }
1788
1789 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1790 {
1791         union ibmvnic_crq crq;
1792
1793         memset(&crq, 0, sizeof(crq));
1794         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1795         crq.version_exchange.cmd = VERSION_EXCHANGE;
1796         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1797
1798         return ibmvnic_send_crq(adapter, &crq);
1799 }
1800
1801 static void send_login(struct ibmvnic_adapter *adapter)
1802 {
1803         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1804         struct ibmvnic_login_buffer *login_buffer;
1805         struct ibmvnic_inflight_cmd *inflight_cmd;
1806         struct device *dev = &adapter->vdev->dev;
1807         dma_addr_t rsp_buffer_token;
1808         dma_addr_t buffer_token;
1809         size_t rsp_buffer_size;
1810         union ibmvnic_crq crq;
1811         unsigned long flags;
1812         size_t buffer_size;
1813         __be64 *tx_list_p;
1814         __be64 *rx_list_p;
1815         int i;
1816
1817         buffer_size =
1818             sizeof(struct ibmvnic_login_buffer) +
1819             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1820
1821         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1822         if (!login_buffer)
1823                 goto buf_alloc_failed;
1824
1825         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1826                                       DMA_TO_DEVICE);
1827         if (dma_mapping_error(dev, buffer_token)) {
1828                 dev_err(dev, "Couldn't map login buffer\n");
1829                 goto buf_map_failed;
1830         }
1831
1832         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1833                           sizeof(u64) * adapter->req_tx_queues +
1834                           sizeof(u64) * adapter->req_rx_queues +
1835                           sizeof(u64) * adapter->req_rx_queues +
1836                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1837
1838         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1839         if (!login_rsp_buffer)
1840                 goto buf_rsp_alloc_failed;
1841
1842         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1843                                           rsp_buffer_size, DMA_FROM_DEVICE);
1844         if (dma_mapping_error(dev, rsp_buffer_token)) {
1845                 dev_err(dev, "Couldn't map login rsp buffer\n");
1846                 goto buf_rsp_map_failed;
1847         }
1848         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1849         if (!inflight_cmd) {
1850                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1851                 goto inflight_alloc_failed;
1852         }
1853         adapter->login_buf = login_buffer;
1854         adapter->login_buf_token = buffer_token;
1855         adapter->login_buf_sz = buffer_size;
1856         adapter->login_rsp_buf = login_rsp_buffer;
1857         adapter->login_rsp_buf_token = rsp_buffer_token;
1858         adapter->login_rsp_buf_sz = rsp_buffer_size;
1859
1860         login_buffer->len = cpu_to_be32(buffer_size);
1861         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1862         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1863         login_buffer->off_txcomp_subcrqs =
1864             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1865         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1866         login_buffer->off_rxcomp_subcrqs =
1867             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1868                         sizeof(u64) * adapter->req_tx_queues);
1869         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1870         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1871
1872         tx_list_p = (__be64 *)((char *)login_buffer +
1873                                       sizeof(struct ibmvnic_login_buffer));
1874         rx_list_p = (__be64 *)((char *)login_buffer +
1875                                       sizeof(struct ibmvnic_login_buffer) +
1876                                       sizeof(u64) * adapter->req_tx_queues);
1877
1878         for (i = 0; i < adapter->req_tx_queues; i++) {
1879                 if (adapter->tx_scrq[i]) {
1880                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1881                                                    crq_num);
1882                 }
1883         }
1884
1885         for (i = 0; i < adapter->req_rx_queues; i++) {
1886                 if (adapter->rx_scrq[i]) {
1887                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1888                                                    crq_num);
1889                 }
1890         }
1891
1892         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1893         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1894                 netdev_dbg(adapter->netdev, "%016lx\n",
1895                            ((unsigned long int *)(adapter->login_buf))[i]);
1896         }
1897
1898         memset(&crq, 0, sizeof(crq));
1899         crq.login.first = IBMVNIC_CRQ_CMD;
1900         crq.login.cmd = LOGIN;
1901         crq.login.ioba = cpu_to_be32(buffer_token);
1902         crq.login.len = cpu_to_be32(buffer_size);
1903
1904         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1905
1906         spin_lock_irqsave(&adapter->inflight_lock, flags);
1907         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1908         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1909
1910         ibmvnic_send_crq(adapter, &crq);
1911
1912         return;
1913
1914 inflight_alloc_failed:
1915         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1916                          DMA_FROM_DEVICE);
1917 buf_rsp_map_failed:
1918         kfree(login_rsp_buffer);
1919 buf_rsp_alloc_failed:
1920         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1921 buf_map_failed:
1922         kfree(login_buffer);
1923 buf_alloc_failed:
1924         return;
1925 }
1926
1927 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1928                              u32 len, u8 map_id)
1929 {
1930         union ibmvnic_crq crq;
1931
1932         memset(&crq, 0, sizeof(crq));
1933         crq.request_map.first = IBMVNIC_CRQ_CMD;
1934         crq.request_map.cmd = REQUEST_MAP;
1935         crq.request_map.map_id = map_id;
1936         crq.request_map.ioba = cpu_to_be32(addr);
1937         crq.request_map.len = cpu_to_be32(len);
1938         ibmvnic_send_crq(adapter, &crq);
1939 }
1940
1941 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1942 {
1943         union ibmvnic_crq crq;
1944
1945         memset(&crq, 0, sizeof(crq));
1946         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1947         crq.request_unmap.cmd = REQUEST_UNMAP;
1948         crq.request_unmap.map_id = map_id;
1949         ibmvnic_send_crq(adapter, &crq);
1950 }
1951
1952 static void send_map_query(struct ibmvnic_adapter *adapter)
1953 {
1954         union ibmvnic_crq crq;
1955
1956         memset(&crq, 0, sizeof(crq));
1957         crq.query_map.first = IBMVNIC_CRQ_CMD;
1958         crq.query_map.cmd = QUERY_MAP;
1959         ibmvnic_send_crq(adapter, &crq);
1960 }
1961
1962 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1963 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1964 {
1965         union ibmvnic_crq crq;
1966
1967         atomic_set(&adapter->running_cap_crqs, 0);
1968         memset(&crq, 0, sizeof(crq));
1969         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1970         crq.query_capability.cmd = QUERY_CAPABILITY;
1971
1972         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1973         atomic_inc(&adapter->running_cap_crqs);
1974         ibmvnic_send_crq(adapter, &crq);
1975
1976         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1977         atomic_inc(&adapter->running_cap_crqs);
1978         ibmvnic_send_crq(adapter, &crq);
1979
1980         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1981         atomic_inc(&adapter->running_cap_crqs);
1982         ibmvnic_send_crq(adapter, &crq);
1983
1984         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1985         atomic_inc(&adapter->running_cap_crqs);
1986         ibmvnic_send_crq(adapter, &crq);
1987
1988         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1989         atomic_inc(&adapter->running_cap_crqs);
1990         ibmvnic_send_crq(adapter, &crq);
1991
1992         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1993         atomic_inc(&adapter->running_cap_crqs);
1994         ibmvnic_send_crq(adapter, &crq);
1995
1996         crq.query_capability.capability =
1997             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1998         atomic_inc(&adapter->running_cap_crqs);
1999         ibmvnic_send_crq(adapter, &crq);
2000
2001         crq.query_capability.capability =
2002             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
2003         atomic_inc(&adapter->running_cap_crqs);
2004         ibmvnic_send_crq(adapter, &crq);
2005
2006         crq.query_capability.capability =
2007             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
2008         atomic_inc(&adapter->running_cap_crqs);
2009         ibmvnic_send_crq(adapter, &crq);
2010
2011         crq.query_capability.capability =
2012             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
2013         atomic_inc(&adapter->running_cap_crqs);
2014         ibmvnic_send_crq(adapter, &crq);
2015
2016         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
2017         atomic_inc(&adapter->running_cap_crqs);
2018         ibmvnic_send_crq(adapter, &crq);
2019
2020         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
2021         atomic_inc(&adapter->running_cap_crqs);
2022         ibmvnic_send_crq(adapter, &crq);
2023
2024         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
2025         atomic_inc(&adapter->running_cap_crqs);
2026         ibmvnic_send_crq(adapter, &crq);
2027
2028         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
2029         atomic_inc(&adapter->running_cap_crqs);
2030         ibmvnic_send_crq(adapter, &crq);
2031
2032         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
2033         atomic_inc(&adapter->running_cap_crqs);
2034         ibmvnic_send_crq(adapter, &crq);
2035
2036         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
2037         atomic_inc(&adapter->running_cap_crqs);
2038         ibmvnic_send_crq(adapter, &crq);
2039
2040         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
2041         atomic_inc(&adapter->running_cap_crqs);
2042         ibmvnic_send_crq(adapter, &crq);
2043
2044         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
2045         atomic_inc(&adapter->running_cap_crqs);
2046         ibmvnic_send_crq(adapter, &crq);
2047
2048         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2049         atomic_inc(&adapter->running_cap_crqs);
2050         ibmvnic_send_crq(adapter, &crq);
2051
2052         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2053         atomic_inc(&adapter->running_cap_crqs);
2054         ibmvnic_send_crq(adapter, &crq);
2055
2056         crq.query_capability.capability =
2057                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2058         atomic_inc(&adapter->running_cap_crqs);
2059         ibmvnic_send_crq(adapter, &crq);
2060
2061         crq.query_capability.capability =
2062                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2063         atomic_inc(&adapter->running_cap_crqs);
2064         ibmvnic_send_crq(adapter, &crq);
2065
2066         crq.query_capability.capability =
2067                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2068         atomic_inc(&adapter->running_cap_crqs);
2069         ibmvnic_send_crq(adapter, &crq);
2070
2071         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2072         atomic_inc(&adapter->running_cap_crqs);
2073         ibmvnic_send_crq(adapter, &crq);
2074 }
2075
2076 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2077 {
2078         struct device *dev = &adapter->vdev->dev;
2079         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2080         union ibmvnic_crq crq;
2081         int i;
2082
2083         dma_unmap_single(dev, adapter->ip_offload_tok,
2084                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2085
2086         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2087         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2088                 netdev_dbg(adapter->netdev, "%016lx\n",
2089                            ((unsigned long int *)(buf))[i]);
2090
2091         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2092         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2093         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2094                    buf->tcp_ipv4_chksum);
2095         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2096                    buf->tcp_ipv6_chksum);
2097         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2098                    buf->udp_ipv4_chksum);
2099         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2100                    buf->udp_ipv6_chksum);
2101         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2102                    buf->large_tx_ipv4);
2103         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2104                    buf->large_tx_ipv6);
2105         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2106                    buf->large_rx_ipv4);
2107         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2108                    buf->large_rx_ipv6);
2109         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2110                    buf->max_ipv4_header_size);
2111         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2112                    buf->max_ipv6_header_size);
2113         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2114                    buf->max_tcp_header_size);
2115         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2116                    buf->max_udp_header_size);
2117         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2118                    buf->max_large_tx_size);
2119         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2120                    buf->max_large_rx_size);
2121         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2122                    buf->ipv6_extension_header);
2123         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2124                    buf->tcp_pseudosum_req);
2125         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2126                    buf->num_ipv6_ext_headers);
2127         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2128                    buf->off_ipv6_ext_headers);
2129
2130         adapter->ip_offload_ctrl_tok =
2131             dma_map_single(dev, &adapter->ip_offload_ctrl,
2132                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2133
2134         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2135                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2136                 return;
2137         }
2138
2139         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2140         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2141         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2142         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2143         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2144
2145         /* large_tx/rx disabled for now, additional features needed */
2146         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2147         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2148         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2149         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2150
2151         adapter->netdev->features = NETIF_F_GSO;
2152
2153         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2154                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2155
2156         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2157                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2158
2159         if ((adapter->netdev->features &
2160             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2161                 adapter->netdev->features |= NETIF_F_RXCSUM;
2162
2163         memset(&crq, 0, sizeof(crq));
2164         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2165         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2166         crq.control_ip_offload.len =
2167             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2168         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2169         ibmvnic_send_crq(adapter, &crq);
2170 }
2171
2172 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2173                                   struct ibmvnic_adapter *adapter)
2174 {
2175         struct device *dev = &adapter->vdev->dev;
2176         struct ibmvnic_error_buff *error_buff, *tmp;
2177         unsigned long flags;
2178         bool found = false;
2179         int i;
2180
2181         if (!crq->request_error_rsp.rc.code) {
2182                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2183                          crq->request_error_rsp.rc.code);
2184                 return;
2185         }
2186
2187         spin_lock_irqsave(&adapter->error_list_lock, flags);
2188         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2189                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2190                         found = true;
2191                         list_del(&error_buff->list);
2192                         break;
2193                 }
2194         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2195
2196         if (!found) {
2197                 dev_err(dev, "Couldn't find error id %x\n",
2198                         be32_to_cpu(crq->request_error_rsp.error_id));
2199                 return;
2200         }
2201
2202         dev_err(dev, "Detailed info for error id %x:",
2203                 be32_to_cpu(crq->request_error_rsp.error_id));
2204
2205         for (i = 0; i < error_buff->len; i++) {
2206                 pr_cont("%02x", (int)error_buff->buff[i]);
2207                 if (i % 8 == 7)
2208                         pr_cont(" ");
2209         }
2210         pr_cont("\n");
2211
2212         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2213                          DMA_FROM_DEVICE);
2214         kfree(error_buff->buff);
2215         kfree(error_buff);
2216 }
2217
2218 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2219                                  struct ibmvnic_adapter *adapter)
2220 {
2221         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2222         struct ibmvnic_inflight_cmd *inflight_cmd;
2223         struct device *dev = &adapter->vdev->dev;
2224         union ibmvnic_crq newcrq;
2225         unsigned long flags;
2226
2227         /* allocate and map buffer */
2228         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2229         if (!adapter->dump_data) {
2230                 complete(&adapter->fw_done);
2231                 return;
2232         }
2233
2234         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2235                                                   DMA_FROM_DEVICE);
2236
2237         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2238                 if (!firmware_has_feature(FW_FEATURE_CMO))
2239                         dev_err(dev, "Couldn't map dump data\n");
2240                 kfree(adapter->dump_data);
2241                 complete(&adapter->fw_done);
2242                 return;
2243         }
2244
2245         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2246         if (!inflight_cmd) {
2247                 dma_unmap_single(dev, adapter->dump_data_token, len,
2248                                  DMA_FROM_DEVICE);
2249                 kfree(adapter->dump_data);
2250                 complete(&adapter->fw_done);
2251                 return;
2252         }
2253
2254         memset(&newcrq, 0, sizeof(newcrq));
2255         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2256         newcrq.request_dump.cmd = REQUEST_DUMP;
2257         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2258         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2259
2260         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2261
2262         spin_lock_irqsave(&adapter->inflight_lock, flags);
2263         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2264         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2265
2266         ibmvnic_send_crq(adapter, &newcrq);
2267 }
2268
2269 static void handle_error_indication(union ibmvnic_crq *crq,
2270                                     struct ibmvnic_adapter *adapter)
2271 {
2272         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2273         struct ibmvnic_inflight_cmd *inflight_cmd;
2274         struct device *dev = &adapter->vdev->dev;
2275         struct ibmvnic_error_buff *error_buff;
2276         union ibmvnic_crq new_crq;
2277         unsigned long flags;
2278
2279         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2280                 crq->error_indication.
2281                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2282                 be32_to_cpu(crq->error_indication.error_id),
2283                 be16_to_cpu(crq->error_indication.error_cause));
2284
2285         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2286         if (!error_buff)
2287                 return;
2288
2289         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2290         if (!error_buff->buff) {
2291                 kfree(error_buff);
2292                 return;
2293         }
2294
2295         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2296                                          DMA_FROM_DEVICE);
2297         if (dma_mapping_error(dev, error_buff->dma)) {
2298                 if (!firmware_has_feature(FW_FEATURE_CMO))
2299                         dev_err(dev, "Couldn't map error buffer\n");
2300                 kfree(error_buff->buff);
2301                 kfree(error_buff);
2302                 return;
2303         }
2304
2305         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2306         if (!inflight_cmd) {
2307                 dma_unmap_single(dev, error_buff->dma, detail_len,
2308                                  DMA_FROM_DEVICE);
2309                 kfree(error_buff->buff);
2310                 kfree(error_buff);
2311                 return;
2312         }
2313
2314         error_buff->len = detail_len;
2315         error_buff->error_id = crq->error_indication.error_id;
2316
2317         spin_lock_irqsave(&adapter->error_list_lock, flags);
2318         list_add_tail(&error_buff->list, &adapter->errors);
2319         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2320
2321         memset(&new_crq, 0, sizeof(new_crq));
2322         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2323         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2324         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2325         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2326         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2327
2328         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2329
2330         spin_lock_irqsave(&adapter->inflight_lock, flags);
2331         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2332         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2333
2334         ibmvnic_send_crq(adapter, &new_crq);
2335 }
2336
2337 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2338                                   struct ibmvnic_adapter *adapter)
2339 {
2340         struct net_device *netdev = adapter->netdev;
2341         struct device *dev = &adapter->vdev->dev;
2342         long rc;
2343
2344         rc = crq->change_mac_addr_rsp.rc.code;
2345         if (rc) {
2346                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2347                 return;
2348         }
2349         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2350                ETH_ALEN);
2351 }
2352
2353 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2354                                    struct ibmvnic_adapter *adapter)
2355 {
2356         struct device *dev = &adapter->vdev->dev;
2357         u64 *req_value;
2358         char *name;
2359
2360         atomic_dec(&adapter->running_cap_crqs);
2361         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2362         case REQ_TX_QUEUES:
2363                 req_value = &adapter->req_tx_queues;
2364                 name = "tx";
2365                 break;
2366         case REQ_RX_QUEUES:
2367                 req_value = &adapter->req_rx_queues;
2368                 name = "rx";
2369                 break;
2370         case REQ_RX_ADD_QUEUES:
2371                 req_value = &adapter->req_rx_add_queues;
2372                 name = "rx_add";
2373                 break;
2374         case REQ_TX_ENTRIES_PER_SUBCRQ:
2375                 req_value = &adapter->req_tx_entries_per_subcrq;
2376                 name = "tx_entries_per_subcrq";
2377                 break;
2378         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2379                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2380                 name = "rx_add_entries_per_subcrq";
2381                 break;
2382         case REQ_MTU:
2383                 req_value = &adapter->req_mtu;
2384                 name = "mtu";
2385                 break;
2386         case PROMISC_REQUESTED:
2387                 req_value = &adapter->promisc;
2388                 name = "promisc";
2389                 break;
2390         default:
2391                 dev_err(dev, "Got invalid cap request rsp %d\n",
2392                         crq->request_capability.capability);
2393                 return;
2394         }
2395
2396         switch (crq->request_capability_rsp.rc.code) {
2397         case SUCCESS:
2398                 break;
2399         case PARTIALSUCCESS:
2400                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2401                          *req_value,
2402                          (long int)be64_to_cpu(crq->request_capability_rsp.
2403                                                number), name);
2404                 release_sub_crqs_no_irqs(adapter);
2405                 *req_value = be64_to_cpu(crq->request_capability_rsp.number);
2406                 init_sub_crqs(adapter, 1);
2407                 return;
2408         default:
2409                 dev_err(dev, "Error %d in request cap rsp\n",
2410                         crq->request_capability_rsp.rc.code);
2411                 return;
2412         }
2413
2414         /* Done receiving requested capabilities, query IP offload support */
2415         if (atomic_read(&adapter->running_cap_crqs) == 0) {
2416                 union ibmvnic_crq newcrq;
2417                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2418                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2419                     &adapter->ip_offload_buf;
2420
2421                 adapter->wait_capability = false;
2422                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2423                                                          buf_sz,
2424                                                          DMA_FROM_DEVICE);
2425
2426                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2427                         if (!firmware_has_feature(FW_FEATURE_CMO))
2428                                 dev_err(dev, "Couldn't map offload buffer\n");
2429                         return;
2430                 }
2431
2432                 memset(&newcrq, 0, sizeof(newcrq));
2433                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2434                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2435                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2436                 newcrq.query_ip_offload.ioba =
2437                     cpu_to_be32(adapter->ip_offload_tok);
2438
2439                 ibmvnic_send_crq(adapter, &newcrq);
2440         }
2441 }
2442
2443 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2444                             struct ibmvnic_adapter *adapter)
2445 {
2446         struct device *dev = &adapter->vdev->dev;
2447         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2448         struct ibmvnic_login_buffer *login = adapter->login_buf;
2449         union ibmvnic_crq crq;
2450         int i;
2451
2452         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2453                          DMA_BIDIRECTIONAL);
2454         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2455                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2456
2457         /* If the number of queues requested can't be allocated by the
2458          * server, the login response will return with code 1. We will need
2459          * to resend the login buffer with fewer queues requested.
2460          */
2461         if (login_rsp_crq->generic.rc.code) {
2462                 adapter->renegotiate = true;
2463                 complete(&adapter->init_done);
2464                 return 0;
2465         }
2466
2467         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2468         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2469                 netdev_dbg(adapter->netdev, "%016lx\n",
2470                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2471         }
2472
2473         /* Sanity checks */
2474         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2475             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2476              adapter->req_rx_add_queues !=
2477              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2478                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2479                 ibmvnic_remove(adapter->vdev);
2480                 return -EIO;
2481         }
2482         complete(&adapter->init_done);
2483
2484         memset(&crq, 0, sizeof(crq));
2485         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2486         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2487         ibmvnic_send_crq(adapter, &crq);
2488
2489         return 0;
2490 }
2491
2492 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2493                                    struct ibmvnic_adapter *adapter)
2494 {
2495         struct device *dev = &adapter->vdev->dev;
2496         u8 map_id = crq->request_map_rsp.map_id;
2497         int tx_subcrqs;
2498         int rx_subcrqs;
2499         long rc;
2500         int i;
2501
2502         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2503         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2504
2505         rc = crq->request_map_rsp.rc.code;
2506         if (rc) {
2507                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2508                 adapter->map_id--;
2509                 /* need to find and zero tx/rx_pool map_id */
2510                 for (i = 0; i < tx_subcrqs; i++) {
2511                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2512                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2513                 }
2514                 for (i = 0; i < rx_subcrqs; i++) {
2515                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2516                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2517                 }
2518         }
2519         complete(&adapter->fw_done);
2520 }
2521
2522 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2523                                      struct ibmvnic_adapter *adapter)
2524 {
2525         struct device *dev = &adapter->vdev->dev;
2526         long rc;
2527
2528         rc = crq->request_unmap_rsp.rc.code;
2529         if (rc)
2530                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2531 }
2532
2533 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2534                                  struct ibmvnic_adapter *adapter)
2535 {
2536         struct net_device *netdev = adapter->netdev;
2537         struct device *dev = &adapter->vdev->dev;
2538         long rc;
2539
2540         rc = crq->query_map_rsp.rc.code;
2541         if (rc) {
2542                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2543                 return;
2544         }
2545         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2546                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2547                    crq->query_map_rsp.free_pages);
2548 }
2549
2550 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2551                                  struct ibmvnic_adapter *adapter)
2552 {
2553         struct net_device *netdev = adapter->netdev;
2554         struct device *dev = &adapter->vdev->dev;
2555         long rc;
2556
2557         atomic_dec(&adapter->running_cap_crqs);
2558         netdev_dbg(netdev, "Outstanding queries: %d\n",
2559                    atomic_read(&adapter->running_cap_crqs));
2560         rc = crq->query_capability.rc.code;
2561         if (rc) {
2562                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2563                 goto out;
2564         }
2565
2566         switch (be16_to_cpu(crq->query_capability.capability)) {
2567         case MIN_TX_QUEUES:
2568                 adapter->min_tx_queues =
2569                     be64_to_cpu(crq->query_capability.number);
2570                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2571                            adapter->min_tx_queues);
2572                 break;
2573         case MIN_RX_QUEUES:
2574                 adapter->min_rx_queues =
2575                     be64_to_cpu(crq->query_capability.number);
2576                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2577                            adapter->min_rx_queues);
2578                 break;
2579         case MIN_RX_ADD_QUEUES:
2580                 adapter->min_rx_add_queues =
2581                     be64_to_cpu(crq->query_capability.number);
2582                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2583                            adapter->min_rx_add_queues);
2584                 break;
2585         case MAX_TX_QUEUES:
2586                 adapter->max_tx_queues =
2587                     be64_to_cpu(crq->query_capability.number);
2588                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2589                            adapter->max_tx_queues);
2590                 break;
2591         case MAX_RX_QUEUES:
2592                 adapter->max_rx_queues =
2593                     be64_to_cpu(crq->query_capability.number);
2594                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2595                            adapter->max_rx_queues);
2596                 break;
2597         case MAX_RX_ADD_QUEUES:
2598                 adapter->max_rx_add_queues =
2599                     be64_to_cpu(crq->query_capability.number);
2600                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2601                            adapter->max_rx_add_queues);
2602                 break;
2603         case MIN_TX_ENTRIES_PER_SUBCRQ:
2604                 adapter->min_tx_entries_per_subcrq =
2605                     be64_to_cpu(crq->query_capability.number);
2606                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2607                            adapter->min_tx_entries_per_subcrq);
2608                 break;
2609         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2610                 adapter->min_rx_add_entries_per_subcrq =
2611                     be64_to_cpu(crq->query_capability.number);
2612                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2613                            adapter->min_rx_add_entries_per_subcrq);
2614                 break;
2615         case MAX_TX_ENTRIES_PER_SUBCRQ:
2616                 adapter->max_tx_entries_per_subcrq =
2617                     be64_to_cpu(crq->query_capability.number);
2618                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2619                            adapter->max_tx_entries_per_subcrq);
2620                 break;
2621         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2622                 adapter->max_rx_add_entries_per_subcrq =
2623                     be64_to_cpu(crq->query_capability.number);
2624                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2625                            adapter->max_rx_add_entries_per_subcrq);
2626                 break;
2627         case TCP_IP_OFFLOAD:
2628                 adapter->tcp_ip_offload =
2629                     be64_to_cpu(crq->query_capability.number);
2630                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2631                            adapter->tcp_ip_offload);
2632                 break;
2633         case PROMISC_SUPPORTED:
2634                 adapter->promisc_supported =
2635                     be64_to_cpu(crq->query_capability.number);
2636                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2637                            adapter->promisc_supported);
2638                 break;
2639         case MIN_MTU:
2640                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2641                 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
2642                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2643                 break;
2644         case MAX_MTU:
2645                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2646                 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
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_crqs) == 0) {
2718                 adapter->wait_capability = false;
2719                 init_sub_crqs(adapter, 0);
2720                 /* We're done querying the capabilities, initialize sub-crqs */
2721         }
2722 }
2723
2724 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2725                                    struct ibmvnic_adapter *adapter)
2726 {
2727         u8 correlator = crq->control_ras_rsp.correlator;
2728         struct device *dev = &adapter->vdev->dev;
2729         bool found = false;
2730         int i;
2731
2732         if (crq->control_ras_rsp.rc.code) {
2733                 dev_warn(dev, "Control ras failed rc=%d\n",
2734                          crq->control_ras_rsp.rc.code);
2735                 return;
2736         }
2737
2738         for (i = 0; i < adapter->ras_comp_num; i++) {
2739                 if (adapter->ras_comps[i].correlator == correlator) {
2740                         found = true;
2741                         break;
2742                 }
2743         }
2744
2745         if (!found) {
2746                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2747                 return;
2748         }
2749
2750         switch (crq->control_ras_rsp.op) {
2751         case IBMVNIC_TRACE_LEVEL:
2752                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2753                 break;
2754         case IBMVNIC_ERROR_LEVEL:
2755                 adapter->ras_comps[i].error_check_level =
2756                     crq->control_ras.level;
2757                 break;
2758         case IBMVNIC_TRACE_PAUSE:
2759                 adapter->ras_comp_int[i].paused = 1;
2760                 break;
2761         case IBMVNIC_TRACE_RESUME:
2762                 adapter->ras_comp_int[i].paused = 0;
2763                 break;
2764         case IBMVNIC_TRACE_ON:
2765                 adapter->ras_comps[i].trace_on = 1;
2766                 break;
2767         case IBMVNIC_TRACE_OFF:
2768                 adapter->ras_comps[i].trace_on = 0;
2769                 break;
2770         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2771                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2772                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2773                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2774                     crq->control_ras_rsp.trace_buff_sz[0];
2775                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2776                     crq->control_ras_rsp.trace_buff_sz[1];
2777                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2778                     crq->control_ras_rsp.trace_buff_sz[2];
2779                 break;
2780         default:
2781                 dev_err(dev, "invalid op %d on control_ras_rsp",
2782                         crq->control_ras_rsp.op);
2783         }
2784 }
2785
2786 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2787                           loff_t *ppos)
2788 {
2789         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2790         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2791         struct device *dev = &adapter->vdev->dev;
2792         struct ibmvnic_fw_trace_entry *trace;
2793         int num = ras_comp_int->num;
2794         union ibmvnic_crq crq;
2795         dma_addr_t trace_tok;
2796
2797         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2798                 return 0;
2799
2800         trace =
2801             dma_alloc_coherent(dev,
2802                                be32_to_cpu(adapter->ras_comps[num].
2803                                            trace_buff_size), &trace_tok,
2804                                GFP_KERNEL);
2805         if (!trace) {
2806                 dev_err(dev, "Couldn't alloc trace buffer\n");
2807                 return 0;
2808         }
2809
2810         memset(&crq, 0, sizeof(crq));
2811         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2812         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2813         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2814         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2815         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2816
2817         init_completion(&adapter->fw_done);
2818         ibmvnic_send_crq(adapter, &crq);
2819         wait_for_completion(&adapter->fw_done);
2820
2821         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2822                 len =
2823                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2824                     *ppos;
2825
2826         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2827
2828         dma_free_coherent(dev,
2829                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2830                           trace, trace_tok);
2831         *ppos += len;
2832         return len;
2833 }
2834
2835 static const struct file_operations trace_ops = {
2836         .owner          = THIS_MODULE,
2837         .open           = simple_open,
2838         .read           = trace_read,
2839 };
2840
2841 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2842                            loff_t *ppos)
2843 {
2844         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2845         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2846         int num = ras_comp_int->num;
2847         char buff[5]; /*  1 or 0 plus \n and \0 */
2848         int size;
2849
2850         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2851
2852         if (*ppos >= size)
2853                 return 0;
2854
2855         copy_to_user(user_buf, buff, size);
2856         *ppos += size;
2857         return size;
2858 }
2859
2860 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2861                             size_t len, loff_t *ppos)
2862 {
2863         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2864         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2865         int num = ras_comp_int->num;
2866         union ibmvnic_crq crq;
2867         unsigned long val;
2868         char buff[9]; /* decimal max int plus \n and \0 */
2869
2870         copy_from_user(buff, user_buf, sizeof(buff));
2871         val = kstrtoul(buff, 10, NULL);
2872
2873         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2874
2875         memset(&crq, 0, sizeof(crq));
2876         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2877         crq.control_ras.cmd = CONTROL_RAS;
2878         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2879         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2880         ibmvnic_send_crq(adapter, &crq);
2881
2882         return len;
2883 }
2884
2885 static const struct file_operations paused_ops = {
2886         .owner          = THIS_MODULE,
2887         .open           = simple_open,
2888         .read           = paused_read,
2889         .write          = paused_write,
2890 };
2891
2892 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2893                             size_t len, loff_t *ppos)
2894 {
2895         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2896         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2897         int num = ras_comp_int->num;
2898         char buff[5]; /*  1 or 0 plus \n and \0 */
2899         int size;
2900
2901         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2902
2903         if (*ppos >= size)
2904                 return 0;
2905
2906         copy_to_user(user_buf, buff, size);
2907         *ppos += size;
2908         return size;
2909 }
2910
2911 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2912                              size_t len, loff_t *ppos)
2913 {
2914         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2915         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2916         int num = ras_comp_int->num;
2917         union ibmvnic_crq crq;
2918         unsigned long val;
2919         char buff[9]; /* decimal max int plus \n and \0 */
2920
2921         copy_from_user(buff, user_buf, sizeof(buff));
2922         val = kstrtoul(buff, 10, NULL);
2923
2924         memset(&crq, 0, sizeof(crq));
2925         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2926         crq.control_ras.cmd = CONTROL_RAS;
2927         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2928         crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
2929
2930         return len;
2931 }
2932
2933 static const struct file_operations tracing_ops = {
2934         .owner          = THIS_MODULE,
2935         .open           = simple_open,
2936         .read           = tracing_read,
2937         .write          = tracing_write,
2938 };
2939
2940 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2941                                 size_t len, loff_t *ppos)
2942 {
2943         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2944         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2945         int num = ras_comp_int->num;
2946         char buff[5]; /* decimal max char plus \n and \0 */
2947         int size;
2948
2949         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2950
2951         if (*ppos >= size)
2952                 return 0;
2953
2954         copy_to_user(user_buf, buff, size);
2955         *ppos += size;
2956         return size;
2957 }
2958
2959 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2960                                  size_t len, loff_t *ppos)
2961 {
2962         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2963         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2964         int num = ras_comp_int->num;
2965         union ibmvnic_crq crq;
2966         unsigned long val;
2967         char buff[9]; /* decimal max int plus \n and \0 */
2968
2969         copy_from_user(buff, user_buf, sizeof(buff));
2970         val = kstrtoul(buff, 10, NULL);
2971
2972         if (val > 9)
2973                 val = 9;
2974
2975         memset(&crq, 0, sizeof(crq));
2976         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2977         crq.control_ras.cmd = CONTROL_RAS;
2978         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2979         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2980         crq.control_ras.level = val;
2981         ibmvnic_send_crq(adapter, &crq);
2982
2983         return len;
2984 }
2985
2986 static const struct file_operations error_level_ops = {
2987         .owner          = THIS_MODULE,
2988         .open           = simple_open,
2989         .read           = error_level_read,
2990         .write          = error_level_write,
2991 };
2992
2993 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2994                                 size_t len, loff_t *ppos)
2995 {
2996         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2997         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2998         int num = ras_comp_int->num;
2999         char buff[5]; /* decimal max char plus \n and \0 */
3000         int size;
3001
3002         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
3003         if (*ppos >= size)
3004                 return 0;
3005
3006         copy_to_user(user_buf, buff, size);
3007         *ppos += size;
3008         return size;
3009 }
3010
3011 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
3012                                  size_t len, loff_t *ppos)
3013 {
3014         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3015         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3016         union ibmvnic_crq crq;
3017         unsigned long val;
3018         char buff[9]; /* decimal max int plus \n and \0 */
3019
3020         copy_from_user(buff, user_buf, sizeof(buff));
3021         val = kstrtoul(buff, 10, NULL);
3022         if (val > 9)
3023                 val = 9;
3024
3025         memset(&crq, 0, sizeof(crq));
3026         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3027         crq.control_ras.cmd = CONTROL_RAS;
3028         crq.control_ras.correlator =
3029             adapter->ras_comps[ras_comp_int->num].correlator;
3030         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
3031         crq.control_ras.level = val;
3032         ibmvnic_send_crq(adapter, &crq);
3033
3034         return len;
3035 }
3036
3037 static const struct file_operations trace_level_ops = {
3038         .owner          = THIS_MODULE,
3039         .open           = simple_open,
3040         .read           = trace_level_read,
3041         .write          = trace_level_write,
3042 };
3043
3044 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
3045                                     size_t len, loff_t *ppos)
3046 {
3047         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3048         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3049         int num = ras_comp_int->num;
3050         char buff[9]; /* decimal max int plus \n and \0 */
3051         int size;
3052
3053         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3054         if (*ppos >= size)
3055                 return 0;
3056
3057         copy_to_user(user_buf, buff, size);
3058         *ppos += size;
3059         return size;
3060 }
3061
3062 static ssize_t trace_buff_size_write(struct file *file,
3063                                      const char __user *user_buf, size_t len,
3064                                      loff_t *ppos)
3065 {
3066         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3067         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3068         union ibmvnic_crq crq;
3069         unsigned long val;
3070         char buff[9]; /* decimal max int plus \n and \0 */
3071
3072         copy_from_user(buff, user_buf, sizeof(buff));
3073         val = kstrtoul(buff, 10, NULL);
3074
3075         memset(&crq, 0, sizeof(crq));
3076         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3077         crq.control_ras.cmd = CONTROL_RAS;
3078         crq.control_ras.correlator =
3079             adapter->ras_comps[ras_comp_int->num].correlator;
3080         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3081         /* trace_buff_sz is 3 bytes, stuff an int into it */
3082         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3083         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3084         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3085         ibmvnic_send_crq(adapter, &crq);
3086
3087         return len;
3088 }
3089
3090 static const struct file_operations trace_size_ops = {
3091         .owner          = THIS_MODULE,
3092         .open           = simple_open,
3093         .read           = trace_buff_size_read,
3094         .write          = trace_buff_size_write,
3095 };
3096
3097 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3098                                          struct ibmvnic_adapter *adapter)
3099 {
3100         struct device *dev = &adapter->vdev->dev;
3101         struct dentry *dir_ent;
3102         struct dentry *ent;
3103         int i;
3104
3105         debugfs_remove_recursive(adapter->ras_comps_ent);
3106
3107         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3108                                                     adapter->debugfs_dir);
3109         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3110                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3111                 return;
3112         }
3113
3114         for (i = 0; i < adapter->ras_comp_num; i++) {
3115                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3116                                              adapter->ras_comps_ent);
3117                 if (!dir_ent || IS_ERR(dir_ent)) {
3118                         dev_info(dev, "debugfs create %s dir failed\n",
3119                                  adapter->ras_comps[i].name);
3120                         continue;
3121                 }
3122
3123                 adapter->ras_comp_int[i].adapter = adapter;
3124                 adapter->ras_comp_int[i].num = i;
3125                 adapter->ras_comp_int[i].desc_blob.data =
3126                     &adapter->ras_comps[i].description;
3127                 adapter->ras_comp_int[i].desc_blob.size =
3128                     sizeof(adapter->ras_comps[i].description);
3129
3130                 /* Don't need to remember the dentry's because the debugfs dir
3131                  * gets removed recursively
3132                  */
3133                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3134                                           &adapter->ras_comp_int[i].desc_blob);
3135                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3136                                           dir_ent, &adapter->ras_comp_int[i],
3137                                           &trace_size_ops);
3138                 ent = debugfs_create_file("trace_level",
3139                                           S_IRUGO |
3140                                           (adapter->ras_comps[i].trace_level !=
3141                                            0xFF  ? S_IWUSR : 0),
3142                                            dir_ent, &adapter->ras_comp_int[i],
3143                                            &trace_level_ops);
3144                 ent = debugfs_create_file("error_level",
3145                                           S_IRUGO |
3146                                           (adapter->
3147                                            ras_comps[i].error_check_level !=
3148                                            0xFF ? S_IWUSR : 0),
3149                                           dir_ent, &adapter->ras_comp_int[i],
3150                                           &trace_level_ops);
3151                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3152                                           dir_ent, &adapter->ras_comp_int[i],
3153                                           &tracing_ops);
3154                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3155                                           dir_ent, &adapter->ras_comp_int[i],
3156                                           &paused_ops);
3157                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3158                                           &adapter->ras_comp_int[i],
3159                                           &trace_ops);
3160         }
3161 }
3162
3163 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3164                                             struct ibmvnic_adapter *adapter)
3165 {
3166         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3167         struct device *dev = &adapter->vdev->dev;
3168         union ibmvnic_crq newcrq;
3169
3170         adapter->ras_comps = dma_alloc_coherent(dev, len,
3171                                                 &adapter->ras_comps_tok,
3172                                                 GFP_KERNEL);
3173         if (!adapter->ras_comps) {
3174                 if (!firmware_has_feature(FW_FEATURE_CMO))
3175                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3176                 return;
3177         }
3178
3179         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3180                                         sizeof(struct ibmvnic_fw_comp_internal),
3181                                         GFP_KERNEL);
3182         if (!adapter->ras_comp_int)
3183                 dma_free_coherent(dev, len, adapter->ras_comps,
3184                                   adapter->ras_comps_tok);
3185
3186         memset(&newcrq, 0, sizeof(newcrq));
3187         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3188         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3189         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3190         newcrq.request_ras_comps.len = cpu_to_be32(len);
3191         ibmvnic_send_crq(adapter, &newcrq);
3192 }
3193
3194 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3195 {
3196         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3197         struct device *dev = &adapter->vdev->dev;
3198         struct ibmvnic_error_buff *error_buff, *tmp2;
3199         unsigned long flags;
3200         unsigned long flags2;
3201
3202         spin_lock_irqsave(&adapter->inflight_lock, flags);
3203         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3204                 switch (inflight_cmd->crq.generic.cmd) {
3205                 case LOGIN:
3206                         dma_unmap_single(dev, adapter->login_buf_token,
3207                                          adapter->login_buf_sz,
3208                                          DMA_BIDIRECTIONAL);
3209                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3210                                          adapter->login_rsp_buf_sz,
3211                                          DMA_BIDIRECTIONAL);
3212                         kfree(adapter->login_rsp_buf);
3213                         kfree(adapter->login_buf);
3214                         break;
3215                 case REQUEST_DUMP:
3216                         complete(&adapter->fw_done);
3217                         break;
3218                 case REQUEST_ERROR_INFO:
3219                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3220                         list_for_each_entry_safe(error_buff, tmp2,
3221                                                  &adapter->errors, list) {
3222                                 dma_unmap_single(dev, error_buff->dma,
3223                                                  error_buff->len,
3224                                                  DMA_FROM_DEVICE);
3225                                 kfree(error_buff->buff);
3226                                 list_del(&error_buff->list);
3227                                 kfree(error_buff);
3228                         }
3229                         spin_unlock_irqrestore(&adapter->error_list_lock,
3230                                                flags2);
3231                         break;
3232                 }
3233                 list_del(&inflight_cmd->list);
3234                 kfree(inflight_cmd);
3235         }
3236         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3237 }
3238
3239 static void ibmvnic_xport_event(struct work_struct *work)
3240 {
3241         struct ibmvnic_adapter *adapter = container_of(work,
3242                                                        struct ibmvnic_adapter,
3243                                                        ibmvnic_xport);
3244         struct device *dev = &adapter->vdev->dev;
3245         long rc;
3246
3247         ibmvnic_free_inflight(adapter);
3248         release_sub_crqs(adapter);
3249         if (adapter->migrated) {
3250                 rc = ibmvnic_reenable_crq_queue(adapter);
3251                 if (rc)
3252                         dev_err(dev, "Error after enable rc=%ld\n", rc);
3253                 adapter->migrated = false;
3254                 rc = ibmvnic_send_crq_init(adapter);
3255                 if (rc)
3256                         dev_err(dev, "Error sending init rc=%ld\n", rc);
3257         }
3258 }
3259
3260 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3261                                struct ibmvnic_adapter *adapter)
3262 {
3263         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3264         struct net_device *netdev = adapter->netdev;
3265         struct device *dev = &adapter->vdev->dev;
3266         long rc;
3267
3268         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3269                    ((unsigned long int *)crq)[0],
3270                    ((unsigned long int *)crq)[1]);
3271         switch (gen_crq->first) {
3272         case IBMVNIC_CRQ_INIT_RSP:
3273                 switch (gen_crq->cmd) {
3274                 case IBMVNIC_CRQ_INIT:
3275                         dev_info(dev, "Partner initialized\n");
3276                         /* Send back a response */
3277                         rc = ibmvnic_send_crq_init_complete(adapter);
3278                         if (!rc)
3279                                 schedule_work(&adapter->vnic_crq_init);
3280                         else
3281                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3282                         break;
3283                 case IBMVNIC_CRQ_INIT_COMPLETE:
3284                         dev_info(dev, "Partner initialization complete\n");
3285                         send_version_xchg(adapter);
3286                         break;
3287                 default:
3288                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3289                 }
3290                 return;
3291         case IBMVNIC_CRQ_XPORT_EVENT:
3292                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3293                         dev_info(dev, "Re-enabling adapter\n");
3294                         adapter->migrated = true;
3295                         schedule_work(&adapter->ibmvnic_xport);
3296                 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3297                         dev_info(dev, "Backing device failover detected\n");
3298                         netif_carrier_off(netdev);
3299                         adapter->failover = true;
3300                 } else {
3301                         /* The adapter lost the connection */
3302                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3303                                 gen_crq->cmd);
3304                         schedule_work(&adapter->ibmvnic_xport);
3305                 }
3306                 return;
3307         case IBMVNIC_CRQ_CMD_RSP:
3308                 break;
3309         default:
3310                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3311                         gen_crq->first);
3312                 return;
3313         }
3314
3315         switch (gen_crq->cmd) {
3316         case VERSION_EXCHANGE_RSP:
3317                 rc = crq->version_exchange_rsp.rc.code;
3318                 if (rc) {
3319                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3320                         break;
3321                 }
3322                 dev_info(dev, "Partner protocol version is %d\n",
3323                          crq->version_exchange_rsp.version);
3324                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3325                     ibmvnic_version)
3326                         ibmvnic_version =
3327                             be16_to_cpu(crq->version_exchange_rsp.version);
3328                 send_cap_queries(adapter);
3329                 break;
3330         case QUERY_CAPABILITY_RSP:
3331                 handle_query_cap_rsp(crq, adapter);
3332                 break;
3333         case QUERY_MAP_RSP:
3334                 handle_query_map_rsp(crq, adapter);
3335                 break;
3336         case REQUEST_MAP_RSP:
3337                 handle_request_map_rsp(crq, adapter);
3338                 break;
3339         case REQUEST_UNMAP_RSP:
3340                 handle_request_unmap_rsp(crq, adapter);
3341                 break;
3342         case REQUEST_CAPABILITY_RSP:
3343                 handle_request_cap_rsp(crq, adapter);
3344                 break;
3345         case LOGIN_RSP:
3346                 netdev_dbg(netdev, "Got Login Response\n");
3347                 handle_login_rsp(crq, adapter);
3348                 break;
3349         case LOGICAL_LINK_STATE_RSP:
3350                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3351                 adapter->logical_link_state =
3352                     crq->logical_link_state_rsp.link_state;
3353                 break;
3354         case LINK_STATE_INDICATION:
3355                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3356                 adapter->phys_link_state =
3357                     crq->link_state_indication.phys_link_state;
3358                 adapter->logical_link_state =
3359                     crq->link_state_indication.logical_link_state;
3360                 break;
3361         case CHANGE_MAC_ADDR_RSP:
3362                 netdev_dbg(netdev, "Got MAC address change Response\n");
3363                 handle_change_mac_rsp(crq, adapter);
3364                 break;
3365         case ERROR_INDICATION:
3366                 netdev_dbg(netdev, "Got Error Indication\n");
3367                 handle_error_indication(crq, adapter);
3368                 break;
3369         case REQUEST_ERROR_RSP:
3370                 netdev_dbg(netdev, "Got Error Detail Response\n");
3371                 handle_error_info_rsp(crq, adapter);
3372                 break;
3373         case REQUEST_STATISTICS_RSP:
3374                 netdev_dbg(netdev, "Got Statistics Response\n");
3375                 complete(&adapter->stats_done);
3376                 break;
3377         case REQUEST_DUMP_SIZE_RSP:
3378                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3379                 handle_dump_size_rsp(crq, adapter);
3380                 break;
3381         case REQUEST_DUMP_RSP:
3382                 netdev_dbg(netdev, "Got Request Dump Response\n");
3383                 complete(&adapter->fw_done);
3384                 break;
3385         case QUERY_IP_OFFLOAD_RSP:
3386                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3387                 handle_query_ip_offload_rsp(adapter);
3388                 break;
3389         case MULTICAST_CTRL_RSP:
3390                 netdev_dbg(netdev, "Got multicast control Response\n");
3391                 break;
3392         case CONTROL_IP_OFFLOAD_RSP:
3393                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3394                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3395                                  sizeof(adapter->ip_offload_ctrl),
3396                                  DMA_TO_DEVICE);
3397                 /* We're done with the queries, perform the login */
3398                 send_login(adapter);
3399                 break;
3400         case REQUEST_RAS_COMP_NUM_RSP:
3401                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3402                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3403                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3404                         break;
3405                 }
3406                 adapter->ras_comp_num =
3407                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3408                 handle_request_ras_comp_num_rsp(crq, adapter);
3409                 break;
3410         case REQUEST_RAS_COMPS_RSP:
3411                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3412                 handle_request_ras_comps_rsp(crq, adapter);
3413                 break;
3414         case CONTROL_RAS_RSP:
3415                 netdev_dbg(netdev, "Got Control RAS Response\n");
3416                 handle_control_ras_rsp(crq, adapter);
3417                 break;
3418         case COLLECT_FW_TRACE_RSP:
3419                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3420                 complete(&adapter->fw_done);
3421                 break;
3422         default:
3423                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3424                            gen_crq->cmd);
3425         }
3426 }
3427
3428 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3429 {
3430         struct ibmvnic_adapter *adapter = instance;
3431         unsigned long flags;
3432
3433         spin_lock_irqsave(&adapter->crq.lock, flags);
3434         vio_disable_interrupts(adapter->vdev);
3435         tasklet_schedule(&adapter->tasklet);
3436         spin_unlock_irqrestore(&adapter->crq.lock, flags);
3437         return IRQ_HANDLED;
3438 }
3439
3440 static void ibmvnic_tasklet(void *data)
3441 {
3442         struct ibmvnic_adapter *adapter = data;
3443         struct ibmvnic_crq_queue *queue = &adapter->crq;
3444         struct vio_dev *vdev = adapter->vdev;
3445         union ibmvnic_crq *crq;
3446         unsigned long flags;
3447         bool done = false;
3448
3449         spin_lock_irqsave(&queue->lock, flags);
3450         vio_disable_interrupts(vdev);
3451         while (!done) {
3452                 /* Pull all the valid messages off the CRQ */
3453                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3454                         ibmvnic_handle_crq(crq, adapter);
3455                         crq->generic.first = 0;
3456                 }
3457                 vio_enable_interrupts(vdev);
3458                 crq = ibmvnic_next_crq(adapter);
3459                 if (crq) {
3460                         vio_disable_interrupts(vdev);
3461                         ibmvnic_handle_crq(crq, adapter);
3462                         crq->generic.first = 0;
3463                 } else {
3464                         /* remain in tasklet until all
3465                          * capabilities responses are received
3466                          */
3467                         if (!adapter->wait_capability)
3468                                 done = true;
3469                 }
3470         }
3471         /* if capabilities CRQ's were sent in this tasklet, the following
3472          * tasklet must wait until all responses are received
3473          */
3474         if (atomic_read(&adapter->running_cap_crqs) != 0)
3475                 adapter->wait_capability = true;
3476         spin_unlock_irqrestore(&queue->lock, flags);
3477 }
3478
3479 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3480 {
3481         struct vio_dev *vdev = adapter->vdev;
3482         int rc;
3483
3484         do {
3485                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3486         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3487
3488         if (rc)
3489                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3490
3491         return rc;
3492 }
3493
3494 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3495 {
3496         struct ibmvnic_crq_queue *crq = &adapter->crq;
3497         struct device *dev = &adapter->vdev->dev;
3498         struct vio_dev *vdev = adapter->vdev;
3499         int rc;
3500
3501         /* Close the CRQ */
3502         do {
3503                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3504         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3505
3506         /* Clean out the queue */
3507         memset(crq->msgs, 0, PAGE_SIZE);
3508         crq->cur = 0;
3509
3510         /* And re-open it again */
3511         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3512                                 crq->msg_token, PAGE_SIZE);
3513
3514         if (rc == H_CLOSED)
3515                 /* Adapter is good, but other end is not ready */
3516                 dev_warn(dev, "Partner adapter not ready\n");
3517         else if (rc != 0)
3518                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3519
3520         return rc;
3521 }
3522
3523 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3524 {
3525         struct ibmvnic_crq_queue *crq = &adapter->crq;
3526         struct vio_dev *vdev = adapter->vdev;
3527         long rc;
3528
3529         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3530         free_irq(vdev->irq, adapter);
3531         tasklet_kill(&adapter->tasklet);
3532         do {
3533                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3534         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3535
3536         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3537                          DMA_BIDIRECTIONAL);
3538         free_page((unsigned long)crq->msgs);
3539 }
3540
3541 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3542 {
3543         struct ibmvnic_crq_queue *crq = &adapter->crq;
3544         struct device *dev = &adapter->vdev->dev;
3545         struct vio_dev *vdev = adapter->vdev;
3546         int rc, retrc = -ENOMEM;
3547
3548         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3549         /* Should we allocate more than one page? */
3550
3551         if (!crq->msgs)
3552                 return -ENOMEM;
3553
3554         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3555         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3556                                         DMA_BIDIRECTIONAL);
3557         if (dma_mapping_error(dev, crq->msg_token))
3558                 goto map_failed;
3559
3560         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3561                                 crq->msg_token, PAGE_SIZE);
3562
3563         if (rc == H_RESOURCE)
3564                 /* maybe kexecing and resource is busy. try a reset */
3565                 rc = ibmvnic_reset_crq(adapter);
3566         retrc = rc;
3567
3568         if (rc == H_CLOSED) {
3569                 dev_warn(dev, "Partner adapter not ready\n");
3570         } else if (rc) {
3571                 dev_warn(dev, "Error %d opening adapter\n", rc);
3572                 goto reg_crq_failed;
3573         }
3574
3575         retrc = 0;
3576
3577         tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
3578                      (unsigned long)adapter);
3579
3580         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3581         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3582                          adapter);
3583         if (rc) {
3584                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3585                         vdev->irq, rc);
3586                 goto req_irq_failed;
3587         }
3588
3589         rc = vio_enable_interrupts(vdev);
3590         if (rc) {
3591                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3592                 goto req_irq_failed;
3593         }
3594
3595         crq->cur = 0;
3596         spin_lock_init(&crq->lock);
3597
3598         return retrc;
3599
3600 req_irq_failed:
3601         tasklet_kill(&adapter->tasklet);
3602         do {
3603                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3604         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3605 reg_crq_failed:
3606         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3607 map_failed:
3608         free_page((unsigned long)crq->msgs);
3609         return retrc;
3610 }
3611
3612 /* debugfs for dump */
3613 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3614 {
3615         struct net_device *netdev = seq->private;
3616         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3617         struct device *dev = &adapter->vdev->dev;
3618         union ibmvnic_crq crq;
3619
3620         memset(&crq, 0, sizeof(crq));
3621         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3622         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3623
3624         init_completion(&adapter->fw_done);
3625         ibmvnic_send_crq(adapter, &crq);
3626         wait_for_completion(&adapter->fw_done);
3627
3628         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3629
3630         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3631                          DMA_BIDIRECTIONAL);
3632
3633         kfree(adapter->dump_data);
3634
3635         return 0;
3636 }
3637
3638 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3639 {
3640         return single_open(file, ibmvnic_dump_show, inode->i_private);
3641 }
3642
3643 static const struct file_operations ibmvnic_dump_ops = {
3644         .owner          = THIS_MODULE,
3645         .open           = ibmvnic_dump_open,
3646         .read           = seq_read,
3647         .llseek         = seq_lseek,
3648         .release        = single_release,
3649 };
3650
3651 static void handle_crq_init_rsp(struct work_struct *work)
3652 {
3653         struct ibmvnic_adapter *adapter = container_of(work,
3654                                                        struct ibmvnic_adapter,
3655                                                        vnic_crq_init);
3656         struct device *dev = &adapter->vdev->dev;
3657         struct net_device *netdev = adapter->netdev;
3658         unsigned long timeout = msecs_to_jiffies(30000);
3659         bool restart = false;
3660         int rc;
3661
3662         if (adapter->failover) {
3663                 release_sub_crqs(adapter);
3664                 if (netif_running(netdev)) {
3665                         netif_tx_disable(netdev);
3666                         ibmvnic_close(netdev);
3667                         restart = true;
3668                 }
3669         }
3670
3671         reinit_completion(&adapter->init_done);
3672         send_version_xchg(adapter);
3673         if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3674                 dev_err(dev, "Passive init timeout\n");
3675                 goto task_failed;
3676         }
3677
3678         do {
3679                 if (adapter->renegotiate) {
3680                         adapter->renegotiate = false;
3681                         release_sub_crqs_no_irqs(adapter);
3682
3683                         reinit_completion(&adapter->init_done);
3684                         send_cap_queries(adapter);
3685                         if (!wait_for_completion_timeout(&adapter->init_done,
3686                                                          timeout)) {
3687                                 dev_err(dev, "Passive init timeout\n");
3688                                 goto task_failed;
3689                         }
3690                 }
3691         } while (adapter->renegotiate);
3692         rc = init_sub_crq_irqs(adapter);
3693
3694         if (rc)
3695                 goto task_failed;
3696
3697         netdev->real_num_tx_queues = adapter->req_tx_queues;
3698         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3699
3700         if (adapter->failover) {
3701                 adapter->failover = false;
3702                 if (restart) {
3703                         rc = ibmvnic_open(netdev);
3704                         if (rc)
3705                                 goto restart_failed;
3706                 }
3707                 netif_carrier_on(netdev);
3708                 return;
3709         }
3710
3711         rc = register_netdev(netdev);
3712         if (rc) {
3713                 dev_err(dev,
3714                         "failed to register netdev rc=%d\n", rc);
3715                 goto register_failed;
3716         }
3717         dev_info(dev, "ibmvnic registered\n");
3718
3719         return;
3720
3721 restart_failed:
3722         dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc);
3723 register_failed:
3724         release_sub_crqs(adapter);
3725 task_failed:
3726         dev_err(dev, "Passive initialization was not successful\n");
3727 }
3728
3729 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3730 {
3731         unsigned long timeout = msecs_to_jiffies(30000);
3732         struct ibmvnic_adapter *adapter;
3733         struct net_device *netdev;
3734         unsigned char *mac_addr_p;
3735         struct dentry *ent;
3736         char buf[17]; /* debugfs name buf */
3737         int rc;
3738
3739         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3740                 dev->unit_address);
3741
3742         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3743                                                         VETH_MAC_ADDR, NULL);
3744         if (!mac_addr_p) {
3745                 dev_err(&dev->dev,
3746                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3747                         __FILE__, __LINE__);
3748                 return 0;
3749         }
3750
3751         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3752                                    IBMVNIC_MAX_TX_QUEUES);
3753         if (!netdev)
3754                 return -ENOMEM;
3755
3756         adapter = netdev_priv(netdev);
3757         dev_set_drvdata(&dev->dev, netdev);
3758         adapter->vdev = dev;
3759         adapter->netdev = netdev;
3760         adapter->failover = false;
3761
3762         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3763         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3764         netdev->irq = dev->irq;
3765         netdev->netdev_ops = &ibmvnic_netdev_ops;
3766         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3767         SET_NETDEV_DEV(netdev, &dev->dev);
3768
3769         INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp);
3770         INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event);
3771
3772         spin_lock_init(&adapter->stats_lock);
3773
3774         rc = ibmvnic_init_crq_queue(adapter);
3775         if (rc) {
3776                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3777                 goto free_netdev;
3778         }
3779
3780         INIT_LIST_HEAD(&adapter->errors);
3781         INIT_LIST_HEAD(&adapter->inflight);
3782         spin_lock_init(&adapter->error_list_lock);
3783         spin_lock_init(&adapter->inflight_lock);
3784
3785         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3786                                               sizeof(struct ibmvnic_statistics),
3787                                               DMA_FROM_DEVICE);
3788         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3789                 if (!firmware_has_feature(FW_FEATURE_CMO))
3790                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3791                 rc = -ENOMEM;
3792                 goto free_crq;
3793         }
3794
3795         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3796         ent = debugfs_create_dir(buf, NULL);
3797         if (!ent || IS_ERR(ent)) {
3798                 dev_info(&dev->dev, "debugfs create directory failed\n");
3799                 adapter->debugfs_dir = NULL;
3800         } else {
3801                 adapter->debugfs_dir = ent;
3802                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3803                                           netdev, &ibmvnic_dump_ops);
3804                 if (!ent || IS_ERR(ent)) {
3805                         dev_info(&dev->dev,
3806                                  "debugfs create dump file failed\n");
3807                         adapter->debugfs_dump = NULL;
3808                 } else {
3809                         adapter->debugfs_dump = ent;
3810                 }
3811         }
3812
3813         init_completion(&adapter->init_done);
3814         ibmvnic_send_crq_init(adapter);
3815         if (!wait_for_completion_timeout(&adapter->init_done, timeout))
3816                 return 0;
3817
3818         do {
3819                 if (adapter->renegotiate) {
3820                         adapter->renegotiate = false;
3821                         release_sub_crqs_no_irqs(adapter);
3822
3823                         reinit_completion(&adapter->init_done);
3824                         send_cap_queries(adapter);
3825                         if (!wait_for_completion_timeout(&adapter->init_done,
3826                                                          timeout))
3827                                 return 0;
3828                 }
3829         } while (adapter->renegotiate);
3830
3831         rc = init_sub_crq_irqs(adapter);
3832         if (rc) {
3833                 dev_err(&dev->dev, "failed to initialize sub crq irqs\n");
3834                 goto free_debugfs;
3835         }
3836
3837         netdev->real_num_tx_queues = adapter->req_tx_queues;
3838         netdev->mtu = adapter->req_mtu - ETH_HLEN;
3839
3840         rc = register_netdev(netdev);
3841         if (rc) {
3842                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3843                 goto free_sub_crqs;
3844         }
3845         dev_info(&dev->dev, "ibmvnic registered\n");
3846
3847         return 0;
3848
3849 free_sub_crqs:
3850         release_sub_crqs(adapter);
3851 free_debugfs:
3852         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3853                 debugfs_remove_recursive(adapter->debugfs_dir);
3854 free_crq:
3855         ibmvnic_release_crq_queue(adapter);
3856 free_netdev:
3857         free_netdev(netdev);
3858         return rc;
3859 }
3860
3861 static int ibmvnic_remove(struct vio_dev *dev)
3862 {
3863         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3864         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3865
3866         unregister_netdev(netdev);
3867
3868         release_sub_crqs(adapter);
3869
3870         ibmvnic_release_crq_queue(adapter);
3871
3872         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3873                 debugfs_remove_recursive(adapter->debugfs_dir);
3874
3875         dma_unmap_single(&dev->dev, adapter->stats_token,
3876                          sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE);
3877
3878         if (adapter->ras_comps)
3879                 dma_free_coherent(&dev->dev,
3880                                   adapter->ras_comp_num *
3881                                   sizeof(struct ibmvnic_fw_component),
3882                                   adapter->ras_comps, adapter->ras_comps_tok);
3883
3884         kfree(adapter->ras_comp_int);
3885
3886         free_netdev(netdev);
3887         dev_set_drvdata(&dev->dev, NULL);
3888
3889         return 0;
3890 }
3891
3892 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3893 {
3894         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3895         struct ibmvnic_adapter *adapter;
3896         struct iommu_table *tbl;
3897         unsigned long ret = 0;
3898         int i;
3899
3900         tbl = get_iommu_table_base(&vdev->dev);
3901
3902         /* netdev inits at probe time along with the structures we need below*/
3903         if (!netdev)
3904                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3905
3906         adapter = netdev_priv(netdev);
3907
3908         ret += PAGE_SIZE; /* the crq message queue */
3909         ret += adapter->bounce_buffer_size;
3910         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3911
3912         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3913                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3914
3915         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3916              i++)
3917                 ret += adapter->rx_pool[i].size *
3918                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3919
3920         return ret;
3921 }
3922
3923 static int ibmvnic_resume(struct device *dev)
3924 {
3925         struct net_device *netdev = dev_get_drvdata(dev);
3926         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3927         int i;
3928
3929         /* kick the interrupt handlers just in case we lost an interrupt */
3930         for (i = 0; i < adapter->req_rx_queues; i++)
3931                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3932                                      adapter->rx_scrq[i]);
3933
3934         return 0;
3935 }
3936
3937 static struct vio_device_id ibmvnic_device_table[] = {
3938         {"network", "IBM,vnic"},
3939         {"", "" }
3940 };
3941 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3942
3943 static const struct dev_pm_ops ibmvnic_pm_ops = {
3944         .resume = ibmvnic_resume
3945 };
3946
3947 static struct vio_driver ibmvnic_driver = {
3948         .id_table       = ibmvnic_device_table,
3949         .probe          = ibmvnic_probe,
3950         .remove         = ibmvnic_remove,
3951         .get_desired_dma = ibmvnic_get_desired_dma,
3952         .name           = ibmvnic_driver_name,
3953         .pm             = &ibmvnic_pm_ops,
3954 };
3955
3956 /* module functions */
3957 static int __init ibmvnic_module_init(void)
3958 {
3959         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3960                 IBMVNIC_DRIVER_VERSION);
3961
3962         return vio_register_driver(&ibmvnic_driver);
3963 }
3964
3965 static void __exit ibmvnic_module_exit(void)
3966 {
3967         vio_unregister_driver(&ibmvnic_driver);
3968 }
3969
3970 module_init(ibmvnic_module_init);
3971 module_exit(ibmvnic_module_exit);