drivers/net/ethernet/ibm/ibmvnic.c

   1 /**************************************************************************/
   2 /*                                                                        */
   3 /*  IBM System i and System p Virtual NIC Device Driver                   */
   4 /*  Copyright (C) 2014 IBM Corp.                                          */
   5 /*  Santiago Leon (santi_leon@yahoo.com)                                  */
   6 /*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
   7 /*  John Allen (jallen@linux.vnet.ibm.com)                                */
   8 /*                                                                        */
   9 /*  This program is free software; you can redistribute it and/or modify  */
  10 /*  it under the terms of the GNU General Public License as published by  */
  11 /*  the Free Software Foundation; either version 2 of the License, or     */
  12 /*  (at your option) any later version.                                   */
  13 /*                                                                        */
  14 /*  This program is distributed in the hope that it will be useful,       */
  15 /*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
  16 /*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
  17 /*  GNU General Public License for more details.                          */
  18 /*                                                                        */
  19 /*  You should have received a copy of the GNU General Public License     */
  20 /*  along with this program.                                              */
  21 /*                                                                        */
  22 /* This module contains the implementation of a virtual ethernet device   */
  23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
  24 /* option of the RS/6000 Platform Architecture to interface with virtual  */
  25 /* ethernet NICs that are presented to the partition by the hypervisor.   */
  26 /*                                                                         */
  27 /* Messages are passed between the VNIC driver and the VNIC server using  */
  28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
  29 /* issue and receive commands that initiate communication with the server */
  30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
  31 /* are used by the driver to notify the server that a packet is           */
  32 /* ready for transmission or that a buffer has been added to receive a    */
  33 /* packet. Subsequently, sCRQs are used by the server to notify the       */
  34 /* driver that a packet transmission has been completed or that a packet  */
  35 /* has been received and placed in a waiting buffer.                      */
  36 /*                                                                        */
  37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
  38 /* which skbs are DMA mapped and immediately unmapped when the transmit   */
  39 /* or receive has been completed, the VNIC driver is required to use      */
  40 /* "long term mapping". This entails that large, continuous DMA mapped    */
  41 /* buffers are allocated on driver initialization and these buffers are   */
  42 /* then continuously reused to pass skbs to and from the VNIC server.     */
  43 /*                                                                        */
  44 /**************************************************************************/
  45
  46 #include <linux/module.h>
  47 #include <linux/moduleparam.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/completion.h>
  51 #include <linux/ioport.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/mm.h>
  60 #include <linux/ethtool.h>
  61 #include <linux/proc_fs.h>
  62 #include <linux/in.h>
  63 #include <linux/ip.h>
  64 #include <linux/ipv6.h>
  65 #include <linux/irq.h>
  66 #include <linux/kthread.h>
  67 #include <linux/seq_file.h>
  68 #include <linux/debugfs.h>
  69 #include <linux/interrupt.h>
  70 #include <net/net_namespace.h>
  71 #include <asm/hvcall.h>
  72 #include <linux/atomic.h>
  73 #include <asm/vio.h>
  74 #include <asm/iommu.h>
  75 #include <linux/uaccess.h>
  76 #include <asm/firmware.h>
  77 #include <linux/seq_file.h>
  78
  79 #include "ibmvnic.h"
  80
  81 static const char ibmvnic_driver_name[] = "ibmvnic";
  82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
  83
  84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>");
  85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
  86 MODULE_LICENSE("GPL");
  87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
  88
  89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
  90 static int ibmvnic_remove(struct vio_dev *);
  91 static void release_sub_crqs(struct ibmvnic_adapter *);
  92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
  93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
  94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
  95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
  96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
  97                        union sub_crq *sub_crq);
  98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
  99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
 100 static int enable_scrq_irq(struct ibmvnic_adapter *,
 101                            struct ibmvnic_sub_crq_queue *);
 102 static int disable_scrq_irq(struct ibmvnic_adapter *,
 103                             struct ibmvnic_sub_crq_queue *);
 104 static int pending_scrq(struct ibmvnic_adapter *,
 105                         struct ibmvnic_sub_crq_queue *);
 106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
 107                                         struct ibmvnic_sub_crq_queue *);
 108 static int ibmvnic_poll(struct napi_struct *napi, int data);
 109 static void send_map_query(struct ibmvnic_adapter *adapter);
 110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
 111 static void send_request_unmap(struct ibmvnic_adapter *, u8);
 112
 113 struct ibmvnic_stat {
 114         char name[ETH_GSTRING_LEN];
 115         int offset;
 116 };
 117
 118 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
 119                              offsetof(struct ibmvnic_statistics, stat))
 120 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
 121
 122 static const struct ibmvnic_stat ibmvnic_stats[] = {
 123         {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
 124         {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
 125         {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
 126         {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
 127         {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
 128         {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
 129         {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
 130         {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
 131         {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
 132         {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
 133         {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
 134         {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
 135         {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
 136         {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
 137         {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
 138         {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
 139         {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
 140         {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
 141         {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
 142         {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
 143         {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
 144         {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
 145 };
 146
 147 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
 148                           unsigned long length, unsigned long *number,
 149                           unsigned long *irq)
 150 {
 151         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 152         long rc;
 153
 154         rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
 155         *number = retbuf[0];
 156         *irq = retbuf[1];
 157
 158         return rc;
 159 }
 160
 161 /* net_device_ops functions */
 162
 163 static void init_rx_pool(struct ibmvnic_adapter *adapter,
 164                          struct ibmvnic_rx_pool *rx_pool, int num, int index,
 165                          int buff_size, int active)
 166 {
 167         netdev_dbg(adapter->netdev,
 168                    "Initializing rx_pool %d, %d buffs, %d bytes each\n",
 169                    index, num, buff_size);
 170         rx_pool->size = num;
 171         rx_pool->index = index;
 172         rx_pool->buff_size = buff_size;
 173         rx_pool->active = active;
 174 }
 175
 176 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
 177                                 struct ibmvnic_long_term_buff *ltb, int size)
 178 {
 179         struct device *dev = &adapter->vdev->dev;
 180
 181         ltb->size = size;
 182         ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
 183                                        GFP_KERNEL);
 184
 185         if (!ltb->buff) {
 186                 dev_err(dev, "Couldn't alloc long term buffer\n");
 187                 return -ENOMEM;
 188         }
 189         ltb->map_id = adapter->map_id;
 190         adapter->map_id++;
 191         send_request_map(adapter, ltb->addr,
 192                          ltb->size, ltb->map_id);
 193         init_completion(&adapter->fw_done);
 194         wait_for_completion(&adapter->fw_done);
 195         return 0;
 196 }
 197
 198 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
 199                                 struct ibmvnic_long_term_buff *ltb)
 200 {
 201         struct device *dev = &adapter->vdev->dev;
 202
 203         dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
 204         send_request_unmap(adapter, ltb->map_id);
 205 }
 206
 207 static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
 208                          struct ibmvnic_rx_pool *pool)
 209 {
 210         struct device *dev = &adapter->vdev->dev;
 211         int i;
 212
 213         pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
 214         if (!pool->free_map)
 215                 return -ENOMEM;
 216
 217         pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
 218                                 GFP_KERNEL);
 219
 220         if (!pool->rx_buff) {
 221                 dev_err(dev, "Couldn't alloc rx buffers\n");
 222                 kfree(pool->free_map);
 223                 return -ENOMEM;
 224         }
 225
 226         if (alloc_long_term_buff(adapter, &pool->long_term_buff,
 227                                  pool->size * pool->buff_size)) {
 228                 kfree(pool->free_map);
 229                 kfree(pool->rx_buff);
 230                 return -ENOMEM;
 231         }
 232
 233         for (i = 0; i < pool->size; ++i)
 234                 pool->free_map[i] = i;
 235
 236         atomic_set(&pool->available, 0);
 237         pool->next_alloc = 0;
 238         pool->next_free = 0;
 239
 240         return 0;
 241 }
 242
 243 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
 244                               struct ibmvnic_rx_pool *pool)
 245 {
 246         int count = pool->size - atomic_read(&pool->available);
 247         struct device *dev = &adapter->vdev->dev;
 248         int buffers_added = 0;
 249         unsigned long lpar_rc;
 250         union sub_crq sub_crq;
 251         struct sk_buff *skb;
 252         unsigned int offset;
 253         dma_addr_t dma_addr;
 254         unsigned char *dst;
 255         u64 *handle_array;
 256         int shift = 0;
 257         int index;
 258         int i;
 259
 260         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 261                                       be32_to_cpu(adapter->login_rsp_buf->
 262                                       off_rxadd_subcrqs));
 263
 264         for (i = 0; i < count; ++i) {
 265                 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
 266                 if (!skb) {
 267                         dev_err(dev, "Couldn't replenish rx buff\n");
 268                         adapter->replenish_no_mem++;
 269                         break;
 270                 }
 271
 272                 index = pool->free_map[pool->next_free];
 273
 274                 if (pool->rx_buff[index].skb)
 275                         dev_err(dev, "Inconsistent free_map!\n");
 276
 277                 /* Copy the skb to the long term mapped DMA buffer */
 278                 offset = index * pool->buff_size;
 279                 dst = pool->long_term_buff.buff + offset;
 280                 memset(dst, 0, pool->buff_size);
 281                 dma_addr = pool->long_term_buff.addr + offset;
 282                 pool->rx_buff[index].data = dst;
 283
 284                 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
 285                 pool->rx_buff[index].dma = dma_addr;
 286                 pool->rx_buff[index].skb = skb;
 287                 pool->rx_buff[index].pool_index = pool->index;
 288                 pool->rx_buff[index].size = pool->buff_size;
 289
 290                 memset(&sub_crq, 0, sizeof(sub_crq));
 291                 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
 292                 sub_crq.rx_add.correlator =
 293                     cpu_to_be64((u64)&pool->rx_buff[index]);
 294                 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
 295                 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
 296
 297                 /* The length field of the sCRQ is defined to be 24 bits so the
 298                  * buffer size needs to be left shifted by a byte before it is
 299                  * converted to big endian to prevent the last byte from being
 300                  * truncated.
 301                  */
 302 #ifdef __LITTLE_ENDIAN__
 303                 shift = 8;
 304 #endif
 305                 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
 306
 307                 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
 308                                       &sub_crq);
 309                 if (lpar_rc != H_SUCCESS)
 310                         goto failure;
 311
 312                 buffers_added++;
 313                 adapter->replenish_add_buff_success++;
 314                 pool->next_free = (pool->next_free + 1) % pool->size;
 315         }
 316         atomic_add(buffers_added, &pool->available);
 317         return;
 318
 319 failure:
 320         dev_info(dev, "replenish pools failure\n");
 321         pool->free_map[pool->next_free] = index;
 322         pool->rx_buff[index].skb = NULL;
 323         if (!dma_mapping_error(dev, dma_addr))
 324                 dma_unmap_single(dev, dma_addr, pool->buff_size,
 325                                  DMA_FROM_DEVICE);
 326
 327         dev_kfree_skb_any(skb);
 328         adapter->replenish_add_buff_failure++;
 329         atomic_add(buffers_added, &pool->available);
 330 }
 331
 332 static void replenish_pools(struct ibmvnic_adapter *adapter)
 333 {
 334         int i;
 335
 336         if (adapter->migrated)
 337                 return;
 338
 339         adapter->replenish_task_cycles++;
 340         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 341              i++) {
 342                 if (adapter->rx_pool[i].active)
 343                         replenish_rx_pool(adapter, &adapter->rx_pool[i]);
 344         }
 345 }
 346
 347 static void free_rx_pool(struct ibmvnic_adapter *adapter,
 348                          struct ibmvnic_rx_pool *pool)
 349 {
 350         int i;
 351
 352         kfree(pool->free_map);
 353         pool->free_map = NULL;
 354
 355         if (!pool->rx_buff)
 356                 return;
 357
 358         for (i = 0; i < pool->size; i++) {
 359                 if (pool->rx_buff[i].skb) {
 360                         dev_kfree_skb_any(pool->rx_buff[i].skb);
 361                         pool->rx_buff[i].skb = NULL;
 362                 }
 363         }
 364         kfree(pool->rx_buff);
 365         pool->rx_buff = NULL;
 366 }
 367
 368 static int ibmvnic_open(struct net_device *netdev)
 369 {
 370         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 371         struct device *dev = &adapter->vdev->dev;
 372         struct ibmvnic_tx_pool *tx_pool;
 373         union ibmvnic_crq crq;
 374         int rxadd_subcrqs;
 375         u64 *size_array;
 376         int tx_subcrqs;
 377         int i, j;
 378
 379         rxadd_subcrqs =
 380             be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 381         tx_subcrqs =
 382             be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 383         size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 384                                   be32_to_cpu(adapter->login_rsp_buf->
 385                                               off_rxadd_buff_size));
 386         adapter->map_id = 1;
 387         adapter->napi = kcalloc(adapter->req_rx_queues,
 388                                 sizeof(struct napi_struct), GFP_KERNEL);
 389         if (!adapter->napi)
 390                 goto alloc_napi_failed;
 391         for (i = 0; i < adapter->req_rx_queues; i++) {
 392                 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
 393                                NAPI_POLL_WEIGHT);
 394                 napi_enable(&adapter->napi[i]);
 395         }
 396         adapter->rx_pool =
 397             kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
 398
 399         if (!adapter->rx_pool)
 400                 goto rx_pool_arr_alloc_failed;
 401         send_map_query(adapter);
 402         for (i = 0; i < rxadd_subcrqs; i++) {
 403                 init_rx_pool(adapter, &adapter->rx_pool[i],
 404                              IBMVNIC_BUFFS_PER_POOL, i,
 405                              be64_to_cpu(size_array[i]), 1);
 406                 if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
 407                         dev_err(dev, "Couldn't alloc rx pool\n");
 408                         goto rx_pool_alloc_failed;
 409                 }
 410         }
 411         adapter->tx_pool =
 412             kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
 413
 414         if (!adapter->tx_pool)
 415                 goto tx_pool_arr_alloc_failed;
 416         for (i = 0; i < tx_subcrqs; i++) {
 417                 tx_pool = &adapter->tx_pool[i];
 418                 tx_pool->tx_buff =
 419                     kcalloc(adapter->max_tx_entries_per_subcrq,
 420                             sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
 421                 if (!tx_pool->tx_buff)
 422                         goto tx_pool_alloc_failed;
 423
 424                 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
 425                                          adapter->max_tx_entries_per_subcrq *
 426                                          adapter->req_mtu))
 427                         goto tx_ltb_alloc_failed;
 428
 429                 tx_pool->free_map =
 430                     kcalloc(adapter->max_tx_entries_per_subcrq,
 431                             sizeof(int), GFP_KERNEL);
 432                 if (!tx_pool->free_map)
 433                         goto tx_fm_alloc_failed;
 434
 435                 for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
 436                         tx_pool->free_map[j] = j;
 437
 438                 tx_pool->consumer_index = 0;
 439                 tx_pool->producer_index = 0;
 440         }
 441         adapter->bounce_buffer_size =
 442             (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
 443         adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
 444                                          GFP_KERNEL);
 445         if (!adapter->bounce_buffer)
 446                 goto bounce_alloc_failed;
 447
 448         adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
 449                                                     adapter->bounce_buffer_size,
 450                                                     DMA_TO_DEVICE);
 451         if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 452                 dev_err(dev, "Couldn't map tx bounce buffer\n");
 453                 goto bounce_map_failed;
 454         }
 455         replenish_pools(adapter);
 456
 457         /* We're ready to receive frames, enable the sub-crq interrupts and
 458          * set the logical link state to up
 459          */
 460         for (i = 0; i < adapter->req_rx_queues; i++)
 461                 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
 462
 463         for (i = 0; i < adapter->req_tx_queues; i++)
 464                 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
 465
 466         memset(&crq, 0, sizeof(crq));
 467         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 468         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 469         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP;
 470         ibmvnic_send_crq(adapter, &crq);
 471
 472         netif_tx_start_all_queues(netdev);
 473
 474         return 0;
 475
 476 bounce_map_failed:
 477         kfree(adapter->bounce_buffer);
 478 bounce_alloc_failed:
 479         i = tx_subcrqs - 1;
 480         kfree(adapter->tx_pool[i].free_map);
 481 tx_fm_alloc_failed:
 482         free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
 483 tx_ltb_alloc_failed:
 484         kfree(adapter->tx_pool[i].tx_buff);
 485 tx_pool_alloc_failed:
 486         for (j = 0; j < i; j++) {
 487                 kfree(adapter->tx_pool[j].tx_buff);
 488                 free_long_term_buff(adapter,
 489                                     &adapter->tx_pool[j].long_term_buff);
 490                 kfree(adapter->tx_pool[j].free_map);
 491         }
 492         kfree(adapter->tx_pool);
 493         adapter->tx_pool = NULL;
 494 tx_pool_arr_alloc_failed:
 495         i = rxadd_subcrqs;
 496 rx_pool_alloc_failed:
 497         for (j = 0; j < i; j++) {
 498                 free_rx_pool(adapter, &adapter->rx_pool[j]);
 499                 free_long_term_buff(adapter,
 500                                     &adapter->rx_pool[j].long_term_buff);
 501         }
 502         kfree(adapter->rx_pool);
 503         adapter->rx_pool = NULL;
 504 rx_pool_arr_alloc_failed:
 505         for (i = 0; i < adapter->req_rx_queues; i++)
 506                 napi_enable(&adapter->napi[i]);
 507 alloc_napi_failed:
 508         return -ENOMEM;
 509 }
 510
 511 static int ibmvnic_close(struct net_device *netdev)
 512 {
 513         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 514         struct device *dev = &adapter->vdev->dev;
 515         union ibmvnic_crq crq;
 516         int i;
 517
 518         adapter->closing = true;
 519
 520         for (i = 0; i < adapter->req_rx_queues; i++)
 521                 napi_disable(&adapter->napi[i]);
 522
 523         netif_tx_stop_all_queues(netdev);
 524
 525         if (adapter->bounce_buffer) {
 526                 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 527                         dma_unmap_single(&adapter->vdev->dev,
 528                                          adapter->bounce_buffer_dma,
 529                                          adapter->bounce_buffer_size,
 530                                          DMA_BIDIRECTIONAL);
 531                         adapter->bounce_buffer_dma = DMA_ERROR_CODE;
 532                 }
 533                 kfree(adapter->bounce_buffer);
 534                 adapter->bounce_buffer = NULL;
 535         }
 536
 537         memset(&crq, 0, sizeof(crq));
 538         crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
 539         crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
 540         crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN;
 541         ibmvnic_send_crq(adapter, &crq);
 542
 543         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 544              i++) {
 545                 kfree(adapter->tx_pool[i].tx_buff);
 546                 free_long_term_buff(adapter,
 547                                     &adapter->tx_pool[i].long_term_buff);
 548                 kfree(adapter->tx_pool[i].free_map);
 549         }
 550         kfree(adapter->tx_pool);
 551         adapter->tx_pool = NULL;
 552
 553         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
 554              i++) {
 555                 free_rx_pool(adapter, &adapter->rx_pool[i]);
 556                 free_long_term_buff(adapter,
 557                                     &adapter->rx_pool[i].long_term_buff);
 558         }
 559         kfree(adapter->rx_pool);
 560         adapter->rx_pool = NULL;
 561
 562         adapter->closing = false;
 563
 564         return 0;
 565 }
 566
 567 /**
 568  * build_hdr_data - creates L2/L3/L4 header data buffer
 569  * @hdr_field - bitfield determining needed headers
 570  * @skb - socket buffer
 571  * @hdr_len - array of header lengths
 572  * @tot_len - total length of data
 573  *
 574  * Reads hdr_field to determine which headers are needed by firmware.
 575  * Builds a buffer containing these headers.  Saves individual header
 576  * lengths and total buffer length to be used to build descriptors.
 577  */
 578 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 579                           int *hdr_len, u8 *hdr_data)
 580 {
 581         int len = 0;
 582         u8 *hdr;
 583
 584         hdr_len[0] = sizeof(struct ethhdr);
 585
 586         if (skb->protocol == htons(ETH_P_IP)) {
 587                 hdr_len[1] = ip_hdr(skb)->ihl * 4;
 588                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 589                         hdr_len[2] = tcp_hdrlen(skb);
 590                 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 591                         hdr_len[2] = sizeof(struct udphdr);
 592         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 593                 hdr_len[1] = sizeof(struct ipv6hdr);
 594                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
 595                         hdr_len[2] = tcp_hdrlen(skb);
 596                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
 597                         hdr_len[2] = sizeof(struct udphdr);
 598         }
 599
 600         memset(hdr_data, 0, 120);
 601         if ((hdr_field >> 6) & 1) {
 602                 hdr = skb_mac_header(skb);
 603                 memcpy(hdr_data, hdr, hdr_len[0]);
 604                 len += hdr_len[0];
 605         }
 606
 607         if ((hdr_field >> 5) & 1) {
 608                 hdr = skb_network_header(skb);
 609                 memcpy(hdr_data + len, hdr, hdr_len[1]);
 610                 len += hdr_len[1];
 611         }
 612
 613         if ((hdr_field >> 4) & 1) {
 614                 hdr = skb_transport_header(skb);
 615                 memcpy(hdr_data + len, hdr, hdr_len[2]);
 616                 len += hdr_len[2];
 617         }
 618         return len;
 619 }
 620
 621 /**
 622  * create_hdr_descs - create header and header extension descriptors
 623  * @hdr_field - bitfield determining needed headers
 624  * @data - buffer containing header data
 625  * @len - length of data buffer
 626  * @hdr_len - array of individual header lengths
 627  * @scrq_arr - descriptor array
 628  *
 629  * Creates header and, if needed, header extension descriptors and
 630  * places them in a descriptor array, scrq_arr
 631  */
 632
 633 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
 634                              union sub_crq *scrq_arr)
 635 {
 636         union sub_crq hdr_desc;
 637         int tmp_len = len;
 638         u8 *data, *cur;
 639         int tmp;
 640
 641         while (tmp_len > 0) {
 642                 cur = hdr_data + len - tmp_len;
 643
 644                 memset(&hdr_desc, 0, sizeof(hdr_desc));
 645                 if (cur != hdr_data) {
 646                         data = hdr_desc.hdr_ext.data;
 647                         tmp = tmp_len > 29 ? 29 : tmp_len;
 648                         hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
 649                         hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
 650                         hdr_desc.hdr_ext.len = tmp;
 651                 } else {
 652                         data = hdr_desc.hdr.data;
 653                         tmp = tmp_len > 24 ? 24 : tmp_len;
 654                         hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
 655                         hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
 656                         hdr_desc.hdr.len = tmp;
 657                         hdr_desc.hdr.l2_len = (u8)hdr_len[0];
 658                         hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
 659                         hdr_desc.hdr.l4_len = (u8)hdr_len[2];
 660                         hdr_desc.hdr.flag = hdr_field << 1;
 661                 }
 662                 memcpy(data, cur, tmp);
 663                 tmp_len -= tmp;
 664                 *scrq_arr = hdr_desc;
 665                 scrq_arr++;
 666         }
 667 }
 668
 669 /**
 670  * build_hdr_descs_arr - build a header descriptor array
 671  * @skb - socket buffer
 672  * @num_entries - number of descriptors to be sent
 673  * @subcrq - first TX descriptor
 674  * @hdr_field - bit field determining which headers will be sent
 675  *
 676  * This function will build a TX descriptor array with applicable
 677  * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
 678  */
 679
 680 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
 681                                 int *num_entries, u8 hdr_field)
 682 {
 683         int hdr_len[3] = {0, 0, 0};
 684         int tot_len, len;
 685         u8 *hdr_data = txbuff->hdr_data;
 686
 687         tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
 688                                  txbuff->hdr_data);
 689         len = tot_len;
 690         len -= 24;
 691         if (len > 0)
 692                 num_entries += len % 29 ? len / 29 + 1 : len / 29;
 693         create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
 694                          txbuff->indir_arr + 1);
 695 }
 696
 697 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
 698 {
 699         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 700         int queue_num = skb_get_queue_mapping(skb);
 701         u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
 702         struct device *dev = &adapter->vdev->dev;
 703         struct ibmvnic_tx_buff *tx_buff = NULL;
 704         struct ibmvnic_tx_pool *tx_pool;
 705         unsigned int tx_send_failed = 0;
 706         unsigned int tx_map_failed = 0;
 707         unsigned int tx_dropped = 0;
 708         unsigned int tx_packets = 0;
 709         unsigned int tx_bytes = 0;
 710         dma_addr_t data_dma_addr;
 711         struct netdev_queue *txq;
 712         bool used_bounce = false;
 713         unsigned long lpar_rc;
 714         union sub_crq tx_crq;
 715         unsigned int offset;
 716         int num_entries = 1;
 717         unsigned char *dst;
 718         u64 *handle_array;
 719         int index = 0;
 720         int ret = 0;
 721
 722         tx_pool = &adapter->tx_pool[queue_num];
 723         txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
 724         handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 725                                    be32_to_cpu(adapter->login_rsp_buf->
 726                                                off_txsubm_subcrqs));
 727         if (adapter->migrated) {
 728                 tx_send_failed++;
 729                 tx_dropped++;
 730                 ret = NETDEV_TX_BUSY;
 731                 goto out;
 732         }
 733
 734         index = tx_pool->free_map[tx_pool->consumer_index];
 735         offset = index * adapter->req_mtu;
 736         dst = tx_pool->long_term_buff.buff + offset;
 737         memset(dst, 0, adapter->req_mtu);
 738         skb_copy_from_linear_data(skb, dst, skb->len);
 739         data_dma_addr = tx_pool->long_term_buff.addr + offset;
 740
 741         tx_pool->consumer_index =
 742             (tx_pool->consumer_index + 1) %
 743                 adapter->max_tx_entries_per_subcrq;
 744
 745         tx_buff = &tx_pool->tx_buff[index];
 746         tx_buff->skb = skb;
 747         tx_buff->data_dma[0] = data_dma_addr;
 748         tx_buff->data_len[0] = skb->len;
 749         tx_buff->index = index;
 750         tx_buff->pool_index = queue_num;
 751         tx_buff->last_frag = true;
 752         tx_buff->used_bounce = used_bounce;
 753
 754         memset(&tx_crq, 0, sizeof(tx_crq));
 755         tx_crq.v1.first = IBMVNIC_CRQ_CMD;
 756         tx_crq.v1.type = IBMVNIC_TX_DESC;
 757         tx_crq.v1.n_crq_elem = 1;
 758         tx_crq.v1.n_sge = 1;
 759         tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
 760         tx_crq.v1.correlator = cpu_to_be32(index);
 761         tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
 762         tx_crq.v1.sge_len = cpu_to_be32(skb->len);
 763         tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 764
 765         if (adapter->vlan_header_insertion) {
 766                 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
 767                 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
 768         }
 769
 770         if (skb->protocol == htons(ETH_P_IP)) {
 771                 if (ip_hdr(skb)->version == 4)
 772                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
 773                 else if (ip_hdr(skb)->version == 6)
 774                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
 775
 776                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 777                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
 778                 else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
 779                         tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
 780         }
 781
 782         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 783                 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
 784                 hdrs += 2;
 785         }
 786         /* determine if l2/3/4 headers are sent to firmware */
 787         if ((*hdrs >> 7) & 1 &&
 788             (skb->protocol == htons(ETH_P_IP) ||
 789              skb->protocol == htons(ETH_P_IPV6))) {
 790                 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
 791                 tx_crq.v1.n_crq_elem = num_entries;
 792                 tx_buff->indir_arr[0] = tx_crq;
 793                 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
 794                                                     sizeof(tx_buff->indir_arr),
 795                                                     DMA_TO_DEVICE);
 796                 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
 797                         if (!firmware_has_feature(FW_FEATURE_CMO))
 798                                 dev_err(dev, "tx: unable to map descriptor array\n");
 799                         tx_map_failed++;
 800                         tx_dropped++;
 801                         ret = NETDEV_TX_BUSY;
 802                         goto out;
 803                 }
 804                 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
 805                                                (u64)tx_buff->indir_dma,
 806                                                (u64)num_entries);
 807         } else {
 808                 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
 809                                       &tx_crq);
 810         }
 811         if (lpar_rc != H_SUCCESS) {
 812                 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
 813
 814                 if (tx_pool->consumer_index == 0)
 815                         tx_pool->consumer_index =
 816                                 adapter->max_tx_entries_per_subcrq - 1;
 817                 else
 818                         tx_pool->consumer_index--;
 819
 820                 tx_send_failed++;
 821                 tx_dropped++;
 822                 ret = NETDEV_TX_BUSY;
 823                 goto out;
 824         }
 825         tx_packets++;
 826         tx_bytes += skb->len;
 827         txq->trans_start = jiffies;
 828         ret = NETDEV_TX_OK;
 829
 830 out:
 831         netdev->stats.tx_dropped += tx_dropped;
 832         netdev->stats.tx_bytes += tx_bytes;
 833         netdev->stats.tx_packets += tx_packets;
 834         adapter->tx_send_failed += tx_send_failed;
 835         adapter->tx_map_failed += tx_map_failed;
 836
 837         return ret;
 838 }
 839
 840 static void ibmvnic_set_multi(struct net_device *netdev)
 841 {
 842         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 843         struct netdev_hw_addr *ha;
 844         union ibmvnic_crq crq;
 845
 846         memset(&crq, 0, sizeof(crq));
 847         crq.request_capability.first = IBMVNIC_CRQ_CMD;
 848         crq.request_capability.cmd = REQUEST_CAPABILITY;
 849
 850         if (netdev->flags & IFF_PROMISC) {
 851                 if (!adapter->promisc_supported)
 852                         return;
 853         } else {
 854                 if (netdev->flags & IFF_ALLMULTI) {
 855                         /* Accept all multicast */
 856                         memset(&crq, 0, sizeof(crq));
 857                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 858                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 859                         crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
 860                         ibmvnic_send_crq(adapter, &crq);
 861                 } else if (netdev_mc_empty(netdev)) {
 862                         /* Reject all multicast */
 863                         memset(&crq, 0, sizeof(crq));
 864                         crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 865                         crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 866                         crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
 867                         ibmvnic_send_crq(adapter, &crq);
 868                 } else {
 869                         /* Accept one or more multicast(s) */
 870                         netdev_for_each_mc_addr(ha, netdev) {
 871                                 memset(&crq, 0, sizeof(crq));
 872                                 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
 873                                 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
 874                                 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
 875                                 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
 876                                                 ha->addr);
 877                                 ibmvnic_send_crq(adapter, &crq);
 878                         }
 879                 }
 880         }
 881 }
 882
 883 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
 884 {
 885         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 886         struct sockaddr *addr = p;
 887         union ibmvnic_crq crq;
 888
 889         if (!is_valid_ether_addr(addr->sa_data))
 890                 return -EADDRNOTAVAIL;
 891
 892         memset(&crq, 0, sizeof(crq));
 893         crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
 894         crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
 895         ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
 896         ibmvnic_send_crq(adapter, &crq);
 897         /* netdev->dev_addr is changed in handle_change_mac_rsp function */
 898         return 0;
 899 }
 900
 901 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
 902 {
 903         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 904
 905         if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
 906                 return -EINVAL;
 907
 908         netdev->mtu = new_mtu;
 909         return 0;
 910 }
 911
 912 static void ibmvnic_tx_timeout(struct net_device *dev)
 913 {
 914         struct ibmvnic_adapter *adapter = netdev_priv(dev);
 915         int rc;
 916
 917         /* Adapter timed out, resetting it */
 918         release_sub_crqs(adapter);
 919         rc = ibmvnic_reset_crq(adapter);
 920         if (rc)
 921                 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
 922         else
 923                 ibmvnic_send_crq_init(adapter);
 924 }
 925
 926 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
 927                                   struct ibmvnic_rx_buff *rx_buff)
 928 {
 929         struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
 930
 931         rx_buff->skb = NULL;
 932
 933         pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
 934         pool->next_alloc = (pool->next_alloc + 1) % pool->size;
 935
 936         atomic_dec(&pool->available);
 937 }
 938
 939 static int ibmvnic_poll(struct napi_struct *napi, int budget)
 940 {
 941         struct net_device *netdev = napi->dev;
 942         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
 943         int scrq_num = (int)(napi - adapter->napi);
 944         int frames_processed = 0;
 945 restart_poll:
 946         while (frames_processed < budget) {
 947                 struct sk_buff *skb;
 948                 struct ibmvnic_rx_buff *rx_buff;
 949                 union sub_crq *next;
 950                 u32 length;
 951                 u16 offset;
 952                 u8 flags = 0;
 953
 954                 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
 955                         break;
 956                 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
 957                 rx_buff =
 958                     (struct ibmvnic_rx_buff *)be64_to_cpu(next->
 959                                                           rx_comp.correlator);
 960                 /* do error checking */
 961                 if (next->rx_comp.rc) {
 962                         netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
 963                         /* free the entry */
 964                         next->rx_comp.first = 0;
 965                         remove_buff_from_pool(adapter, rx_buff);
 966                         break;
 967                 }
 968
 969                 length = be32_to_cpu(next->rx_comp.len);
 970                 offset = be16_to_cpu(next->rx_comp.off_frame_data);
 971                 flags = next->rx_comp.flags;
 972                 skb = rx_buff->skb;
 973                 skb_copy_to_linear_data(skb, rx_buff->data + offset,
 974                                         length);
 975                 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci);
 976                 /* free the entry */
 977                 next->rx_comp.first = 0;
 978                 remove_buff_from_pool(adapter, rx_buff);
 979
 980                 skb_put(skb, length);
 981                 skb->protocol = eth_type_trans(skb, netdev);
 982
 983                 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
 984                     flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
 985                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 986                 }
 987
 988                 length = skb->len;
 989                 napi_gro_receive(napi, skb); /* send it up */
 990                 netdev->stats.rx_packets++;
 991                 netdev->stats.rx_bytes += length;
 992                 frames_processed++;
 993         }
 994         replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
 995
 996         if (frames_processed < budget) {
 997                 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
 998                 napi_complete(napi);
 999                 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1000                     napi_reschedule(napi)) {
1001                         disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1002                         goto restart_poll;
1003                 }
1004         }
1005         return frames_processed;
1006 }
1007
1008 #ifdef CONFIG_NET_POLL_CONTROLLER
1009 static void ibmvnic_netpoll_controller(struct net_device *dev)
1010 {
1011         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1012         int i;
1013
1014         replenish_pools(netdev_priv(dev));
1015         for (i = 0; i < adapter->req_rx_queues; i++)
1016                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1017                                      adapter->rx_scrq[i]);
1018 }
1019 #endif
1020
1021 static const struct net_device_ops ibmvnic_netdev_ops = {
1022         .ndo_open               = ibmvnic_open,
1023         .ndo_stop               = ibmvnic_close,
1024         .ndo_start_xmit         = ibmvnic_xmit,
1025         .ndo_set_rx_mode        = ibmvnic_set_multi,
1026         .ndo_set_mac_address    = ibmvnic_set_mac,
1027         .ndo_validate_addr      = eth_validate_addr,
1028         .ndo_change_mtu         = ibmvnic_change_mtu,
1029         .ndo_tx_timeout         = ibmvnic_tx_timeout,
1030 #ifdef CONFIG_NET_POLL_CONTROLLER
1031         .ndo_poll_controller    = ibmvnic_netpoll_controller,
1032 #endif
1033 };
1034
1035 /* ethtool functions */
1036
1037 static int ibmvnic_get_settings(struct net_device *netdev,
1038                                 struct ethtool_cmd *cmd)
1039 {
1040         cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1041                           SUPPORTED_FIBRE);
1042         cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1043                             ADVERTISED_FIBRE);
1044         ethtool_cmd_speed_set(cmd, SPEED_1000);
1045         cmd->duplex = DUPLEX_FULL;
1046         cmd->port = PORT_FIBRE;
1047         cmd->phy_address = 0;
1048         cmd->transceiver = XCVR_INTERNAL;
1049         cmd->autoneg = AUTONEG_ENABLE;
1050         cmd->maxtxpkt = 0;
1051         cmd->maxrxpkt = 1;
1052         return 0;
1053 }
1054
1055 static void ibmvnic_get_drvinfo(struct net_device *dev,
1056                                 struct ethtool_drvinfo *info)
1057 {
1058         strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
1059         strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
1060 }
1061
1062 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
1063 {
1064         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1065
1066         return adapter->msg_enable;
1067 }
1068
1069 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
1070 {
1071         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1072
1073         adapter->msg_enable = data;
1074 }
1075
1076 static u32 ibmvnic_get_link(struct net_device *netdev)
1077 {
1078         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1079
1080         /* Don't need to send a query because we request a logical link up at
1081          * init and then we wait for link state indications
1082          */
1083         return adapter->logical_link_state;
1084 }
1085
1086 static void ibmvnic_get_ringparam(struct net_device *netdev,
1087                                   struct ethtool_ringparam *ring)
1088 {
1089         ring->rx_max_pending = 0;
1090         ring->tx_max_pending = 0;
1091         ring->rx_mini_max_pending = 0;
1092         ring->rx_jumbo_max_pending = 0;
1093         ring->rx_pending = 0;
1094         ring->tx_pending = 0;
1095         ring->rx_mini_pending = 0;
1096         ring->rx_jumbo_pending = 0;
1097 }
1098
1099 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1100 {
1101         int i;
1102
1103         if (stringset != ETH_SS_STATS)
1104                 return;
1105
1106         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
1107                 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
1108 }
1109
1110 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
1111 {
1112         switch (sset) {
1113         case ETH_SS_STATS:
1114                 return ARRAY_SIZE(ibmvnic_stats);
1115         default:
1116                 return -EOPNOTSUPP;
1117         }
1118 }
1119
1120 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
1121                                       struct ethtool_stats *stats, u64 *data)
1122 {
1123         struct ibmvnic_adapter *adapter = netdev_priv(dev);
1124         union ibmvnic_crq crq;
1125         int i;
1126
1127         memset(&crq, 0, sizeof(crq));
1128         crq.request_statistics.first = IBMVNIC_CRQ_CMD;
1129         crq.request_statistics.cmd = REQUEST_STATISTICS;
1130         crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
1131         crq.request_statistics.len =
1132             cpu_to_be32(sizeof(struct ibmvnic_statistics));
1133         ibmvnic_send_crq(adapter, &crq);
1134
1135         /* Wait for data to be written */
1136         init_completion(&adapter->stats_done);
1137         wait_for_completion(&adapter->stats_done);
1138
1139         for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
1140                 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
1141 }
1142
1143 static const struct ethtool_ops ibmvnic_ethtool_ops = {
1144         .get_settings           = ibmvnic_get_settings,
1145         .get_drvinfo            = ibmvnic_get_drvinfo,
1146         .get_msglevel           = ibmvnic_get_msglevel,
1147         .set_msglevel           = ibmvnic_set_msglevel,
1148         .get_link               = ibmvnic_get_link,
1149         .get_ringparam          = ibmvnic_get_ringparam,
1150         .get_strings            = ibmvnic_get_strings,
1151         .get_sset_count         = ibmvnic_get_sset_count,
1152         .get_ethtool_stats      = ibmvnic_get_ethtool_stats,
1153 };
1154
1155 /* Routines for managing CRQs/sCRQs  */
1156
1157 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
1158                                   struct ibmvnic_sub_crq_queue *scrq)
1159 {
1160         struct device *dev = &adapter->vdev->dev;
1161         long rc;
1162
1163         netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
1164
1165         /* Close the sub-crqs */
1166         do {
1167                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1168                                         adapter->vdev->unit_address,
1169                                         scrq->crq_num);
1170         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1171
1172         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1173                          DMA_BIDIRECTIONAL);
1174         free_pages((unsigned long)scrq->msgs, 2);
1175         kfree(scrq);
1176 }
1177
1178 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
1179                                                         *adapter)
1180 {
1181         struct device *dev = &adapter->vdev->dev;
1182         struct ibmvnic_sub_crq_queue *scrq;
1183         int rc;
1184
1185         scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC);
1186         if (!scrq)
1187                 return NULL;
1188
1189         scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
1190         memset(scrq->msgs, 0, 4 * PAGE_SIZE);
1191         if (!scrq->msgs) {
1192                 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
1193                 goto zero_page_failed;
1194         }
1195
1196         scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
1197                                          DMA_BIDIRECTIONAL);
1198         if (dma_mapping_error(dev, scrq->msg_token)) {
1199                 dev_warn(dev, "Couldn't map crq queue messages page\n");
1200                 goto map_failed;
1201         }
1202
1203         rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
1204                            4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
1205
1206         if (rc == H_RESOURCE)
1207                 rc = ibmvnic_reset_crq(adapter);
1208
1209         if (rc == H_CLOSED) {
1210                 dev_warn(dev, "Partner adapter not ready, waiting.\n");
1211         } else if (rc) {
1212                 dev_warn(dev, "Error %d registering sub-crq\n", rc);
1213                 goto reg_failed;
1214         }
1215
1216         scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
1217         if (scrq->irq == NO_IRQ) {
1218                 dev_err(dev, "Error mapping irq\n");
1219                 goto map_irq_failed;
1220         }
1221
1222         scrq->adapter = adapter;
1223         scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
1224         scrq->cur = 0;
1225         scrq->rx_skb_top = NULL;
1226         spin_lock_init(&scrq->lock);
1227
1228         netdev_dbg(adapter->netdev,
1229                    "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
1230                    scrq->crq_num, scrq->hw_irq, scrq->irq);
1231
1232         return scrq;
1233
1234 map_irq_failed:
1235         do {
1236                 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
1237                                         adapter->vdev->unit_address,
1238                                         scrq->crq_num);
1239         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
1240 reg_failed:
1241         dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
1242                          DMA_BIDIRECTIONAL);
1243 map_failed:
1244         free_pages((unsigned long)scrq->msgs, 2);
1245 zero_page_failed:
1246         kfree(scrq);
1247
1248         return NULL;
1249 }
1250
1251 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
1252 {
1253         int i;
1254
1255         if (adapter->tx_scrq) {
1256                 for (i = 0; i < adapter->req_tx_queues; i++)
1257                         if (adapter->tx_scrq[i]) {
1258                                 free_irq(adapter->tx_scrq[i]->irq,
1259                                          adapter->tx_scrq[i]);
1260                                 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
1261                                 release_sub_crq_queue(adapter,
1262                                                       adapter->tx_scrq[i]);
1263                         }
1264                 adapter->tx_scrq = NULL;
1265         }
1266
1267         if (adapter->rx_scrq) {
1268                 for (i = 0; i < adapter->req_rx_queues; i++)
1269                         if (adapter->rx_scrq[i]) {
1270                                 free_irq(adapter->rx_scrq[i]->irq,
1271                                          adapter->rx_scrq[i]);
1272                                 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
1273                                 release_sub_crq_queue(adapter,
1274                                                       adapter->rx_scrq[i]);
1275                         }
1276                 adapter->rx_scrq = NULL;
1277         }
1278
1279         adapter->requested_caps = 0;
1280 }
1281
1282 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
1283                             struct ibmvnic_sub_crq_queue *scrq)
1284 {
1285         struct device *dev = &adapter->vdev->dev;
1286         unsigned long rc;
1287
1288         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1289                                 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1290         if (rc)
1291                 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
1292                         scrq->hw_irq, rc);
1293         return rc;
1294 }
1295
1296 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
1297                            struct ibmvnic_sub_crq_queue *scrq)
1298 {
1299         struct device *dev = &adapter->vdev->dev;
1300         unsigned long rc;
1301
1302         if (scrq->hw_irq > 0x100000000ULL) {
1303                 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
1304                 return 1;
1305         }
1306
1307         rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
1308                                 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
1309         if (rc)
1310                 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
1311                         scrq->hw_irq, rc);
1312         return rc;
1313 }
1314
1315 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
1316                                struct ibmvnic_sub_crq_queue *scrq)
1317 {
1318         struct device *dev = &adapter->vdev->dev;
1319         struct ibmvnic_tx_buff *txbuff;
1320         union sub_crq *next;
1321         int index;
1322         int i, j;
1323         u8 first;
1324
1325 restart_loop:
1326         while (pending_scrq(adapter, scrq)) {
1327                 unsigned int pool = scrq->pool_index;
1328
1329                 next = ibmvnic_next_scrq(adapter, scrq);
1330                 for (i = 0; i < next->tx_comp.num_comps; i++) {
1331                         if (next->tx_comp.rcs[i]) {
1332                                 dev_err(dev, "tx error %x\n",
1333                                         next->tx_comp.rcs[i]);
1334                                 continue;
1335                         }
1336                         index = be32_to_cpu(next->tx_comp.correlators[i]);
1337                         txbuff = &adapter->tx_pool[pool].tx_buff[index];
1338
1339                         for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
1340                                 if (!txbuff->data_dma[j])
1341                                         continue;
1342
1343                                 txbuff->data_dma[j] = 0;
1344                                 txbuff->used_bounce = false;
1345                         }
1346                         /* if sub_crq was sent indirectly */
1347                         first = txbuff->indir_arr[0].generic.first;
1348                         if (first == IBMVNIC_CRQ_CMD) {
1349                                 dma_unmap_single(dev, txbuff->indir_dma,
1350                                                  sizeof(txbuff->indir_arr),
1351                                                  DMA_TO_DEVICE);
1352                         }
1353
1354                         if (txbuff->last_frag)
1355                                 dev_kfree_skb_any(txbuff->skb);
1356
1357                         adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
1358                                                      producer_index] = index;
1359                         adapter->tx_pool[pool].producer_index =
1360                             (adapter->tx_pool[pool].producer_index + 1) %
1361                             adapter->max_tx_entries_per_subcrq;
1362                 }
1363                 /* remove tx_comp scrq*/
1364                 next->tx_comp.first = 0;
1365         }
1366
1367         enable_scrq_irq(adapter, scrq);
1368
1369         if (pending_scrq(adapter, scrq)) {
1370                 disable_scrq_irq(adapter, scrq);
1371                 goto restart_loop;
1372         }
1373
1374         return 0;
1375 }
1376
1377 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
1378 {
1379         struct ibmvnic_sub_crq_queue *scrq = instance;
1380         struct ibmvnic_adapter *adapter = scrq->adapter;
1381
1382         disable_scrq_irq(adapter, scrq);
1383         ibmvnic_complete_tx(adapter, scrq);
1384
1385         return IRQ_HANDLED;
1386 }
1387
1388 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
1389 {
1390         struct ibmvnic_sub_crq_queue *scrq = instance;
1391         struct ibmvnic_adapter *adapter = scrq->adapter;
1392
1393         if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
1394                 disable_scrq_irq(adapter, scrq);
1395                 __napi_schedule(&adapter->napi[scrq->scrq_num]);
1396         }
1397
1398         return IRQ_HANDLED;
1399 }
1400
1401 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
1402 {
1403         struct device *dev = &adapter->vdev->dev;
1404         struct ibmvnic_sub_crq_queue **allqueues;
1405         int registered_queues = 0;
1406         union ibmvnic_crq crq;
1407         int total_queues;
1408         int more = 0;
1409         int i, j;
1410         int rc;
1411
1412         if (!retry) {
1413                 /* Sub-CRQ entries are 32 byte long */
1414                 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
1415
1416                 if (adapter->min_tx_entries_per_subcrq > entries_page ||
1417                     adapter->min_rx_add_entries_per_subcrq > entries_page) {
1418                         dev_err(dev, "Fatal, invalid entries per sub-crq\n");
1419                         goto allqueues_failed;
1420                 }
1421
1422                 /* Get the minimum between the queried max and the entries
1423                  * that fit in our PAGE_SIZE
1424                  */
1425                 adapter->req_tx_entries_per_subcrq =
1426                     adapter->max_tx_entries_per_subcrq > entries_page ?
1427                     entries_page : adapter->max_tx_entries_per_subcrq;
1428                 adapter->req_rx_add_entries_per_subcrq =
1429                     adapter->max_rx_add_entries_per_subcrq > entries_page ?
1430                     entries_page : adapter->max_rx_add_entries_per_subcrq;
1431
1432                 /* Choosing the maximum number of queues supported by firmware*/
1433                 adapter->req_tx_queues = adapter->max_tx_queues;
1434                 adapter->req_rx_queues = adapter->max_rx_queues;
1435                 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
1436
1437                 adapter->req_mtu = adapter->max_mtu;
1438         }
1439
1440         total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
1441
1442         allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
1443         if (!allqueues)
1444                 goto allqueues_failed;
1445
1446         for (i = 0; i < total_queues; i++) {
1447                 allqueues[i] = init_sub_crq_queue(adapter);
1448                 if (!allqueues[i]) {
1449                         dev_warn(dev, "Couldn't allocate all sub-crqs\n");
1450                         break;
1451                 }
1452                 registered_queues++;
1453         }
1454
1455         /* Make sure we were able to register the minimum number of queues */
1456         if (registered_queues <
1457             adapter->min_tx_queues + adapter->min_rx_queues) {
1458                 dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
1459                 goto tx_failed;
1460         }
1461
1462         /* Distribute the failed allocated queues*/
1463         for (i = 0; i < total_queues - registered_queues + more ; i++) {
1464                 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
1465                 switch (i % 3) {
1466                 case 0:
1467                         if (adapter->req_rx_queues > adapter->min_rx_queues)
1468                                 adapter->req_rx_queues--;
1469                         else
1470                                 more++;
1471                         break;
1472                 case 1:
1473                         if (adapter->req_tx_queues > adapter->min_tx_queues)
1474                                 adapter->req_tx_queues--;
1475                         else
1476                                 more++;
1477                         break;
1478                 }
1479         }
1480
1481         adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
1482                                    sizeof(*adapter->tx_scrq), GFP_ATOMIC);
1483         if (!adapter->tx_scrq)
1484                 goto tx_failed;
1485
1486         for (i = 0; i < adapter->req_tx_queues; i++) {
1487                 adapter->tx_scrq[i] = allqueues[i];
1488                 adapter->tx_scrq[i]->pool_index = i;
1489                 rc = request_irq(adapter->tx_scrq[i]->irq, ibmvnic_interrupt_tx,
1490                                  0, "ibmvnic_tx", adapter->tx_scrq[i]);
1491                 if (rc) {
1492                         dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
1493                                 adapter->tx_scrq[i]->irq, rc);
1494                         goto req_tx_irq_failed;
1495                 }
1496         }
1497
1498         adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
1499                                    sizeof(*adapter->rx_scrq), GFP_ATOMIC);
1500         if (!adapter->rx_scrq)
1501                 goto rx_failed;
1502
1503         for (i = 0; i < adapter->req_rx_queues; i++) {
1504                 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
1505                 adapter->rx_scrq[i]->scrq_num = i;
1506                 rc = request_irq(adapter->rx_scrq[i]->irq, ibmvnic_interrupt_rx,
1507                                  0, "ibmvnic_rx", adapter->rx_scrq[i]);
1508                 if (rc) {
1509                         dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
1510                                 adapter->rx_scrq[i]->irq, rc);
1511                         goto req_rx_irq_failed;
1512                 }
1513         }
1514
1515         memset(&crq, 0, sizeof(crq));
1516         crq.request_capability.first = IBMVNIC_CRQ_CMD;
1517         crq.request_capability.cmd = REQUEST_CAPABILITY;
1518
1519         crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
1520         crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
1521         ibmvnic_send_crq(adapter, &crq);
1522
1523         crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
1524         crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
1525         ibmvnic_send_crq(adapter, &crq);
1526
1527         crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
1528         crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
1529         ibmvnic_send_crq(adapter, &crq);
1530
1531         crq.request_capability.capability =
1532             cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
1533         crq.request_capability.number =
1534             cpu_to_be64(adapter->req_tx_entries_per_subcrq);
1535         ibmvnic_send_crq(adapter, &crq);
1536
1537         crq.request_capability.capability =
1538             cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
1539         crq.request_capability.number =
1540             cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
1541         ibmvnic_send_crq(adapter, &crq);
1542
1543         crq.request_capability.capability = cpu_to_be16(REQ_MTU);
1544         crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
1545         ibmvnic_send_crq(adapter, &crq);
1546
1547         if (adapter->netdev->flags & IFF_PROMISC) {
1548                 if (adapter->promisc_supported) {
1549                         crq.request_capability.capability =
1550                             cpu_to_be16(PROMISC_REQUESTED);
1551                         crq.request_capability.number = cpu_to_be64(1);
1552                         ibmvnic_send_crq(adapter, &crq);
1553                 }
1554         } else {
1555                 crq.request_capability.capability =
1556                     cpu_to_be16(PROMISC_REQUESTED);
1557                 crq.request_capability.number = cpu_to_be64(0);
1558                 ibmvnic_send_crq(adapter, &crq);
1559         }
1560
1561         kfree(allqueues);
1562
1563         return;
1564
1565 req_rx_irq_failed:
1566         for (j = 0; j < i; j++)
1567                 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
1568         i = adapter->req_tx_queues;
1569 req_tx_irq_failed:
1570         for (j = 0; j < i; j++)
1571                 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
1572         kfree(adapter->rx_scrq);
1573         adapter->rx_scrq = NULL;
1574 rx_failed:
1575         kfree(adapter->tx_scrq);
1576         adapter->tx_scrq = NULL;
1577 tx_failed:
1578         for (i = 0; i < registered_queues; i++)
1579                 release_sub_crq_queue(adapter, allqueues[i]);
1580         kfree(allqueues);
1581 allqueues_failed:
1582         ibmvnic_remove(adapter->vdev);
1583 }
1584
1585 static int pending_scrq(struct ibmvnic_adapter *adapter,
1586                         struct ibmvnic_sub_crq_queue *scrq)
1587 {
1588         union sub_crq *entry = &scrq->msgs[scrq->cur];
1589
1590         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
1591                 return 1;
1592         else
1593                 return 0;
1594 }
1595
1596 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
1597                                         struct ibmvnic_sub_crq_queue *scrq)
1598 {
1599         union sub_crq *entry;
1600         unsigned long flags;
1601
1602         spin_lock_irqsave(&scrq->lock, flags);
1603         entry = &scrq->msgs[scrq->cur];
1604         if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1605                 if (++scrq->cur == scrq->size)
1606                         scrq->cur = 0;
1607         } else {
1608                 entry = NULL;
1609         }
1610         spin_unlock_irqrestore(&scrq->lock, flags);
1611
1612         return entry;
1613 }
1614
1615 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
1616 {
1617         struct ibmvnic_crq_queue *queue = &adapter->crq;
1618         union ibmvnic_crq *crq;
1619
1620         crq = &queue->msgs[queue->cur];
1621         if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
1622                 if (++queue->cur == queue->size)
1623                         queue->cur = 0;
1624         } else {
1625                 crq = NULL;
1626         }
1627
1628         return crq;
1629 }
1630
1631 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
1632                        union sub_crq *sub_crq)
1633 {
1634         unsigned int ua = adapter->vdev->unit_address;
1635         struct device *dev = &adapter->vdev->dev;
1636         u64 *u64_crq = (u64 *)sub_crq;
1637         int rc;
1638
1639         netdev_dbg(adapter->netdev,
1640                    "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
1641                    (unsigned long int)cpu_to_be64(remote_handle),
1642                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1643                    (unsigned long int)cpu_to_be64(u64_crq[1]),
1644                    (unsigned long int)cpu_to_be64(u64_crq[2]),
1645                    (unsigned long int)cpu_to_be64(u64_crq[3]));
1646
1647         /* Make sure the hypervisor sees the complete request */
1648         mb();
1649
1650         rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
1651                                 cpu_to_be64(remote_handle),
1652                                 cpu_to_be64(u64_crq[0]),
1653                                 cpu_to_be64(u64_crq[1]),
1654                                 cpu_to_be64(u64_crq[2]),
1655                                 cpu_to_be64(u64_crq[3]));
1656
1657         if (rc) {
1658                 if (rc == H_CLOSED)
1659                         dev_warn(dev, "CRQ Queue closed\n");
1660                 dev_err(dev, "Send error (rc=%d)\n", rc);
1661         }
1662
1663         return rc;
1664 }
1665
1666 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
1667                                 u64 remote_handle, u64 ioba, u64 num_entries)
1668 {
1669         unsigned int ua = adapter->vdev->unit_address;
1670         struct device *dev = &adapter->vdev->dev;
1671         int rc;
1672
1673         /* Make sure the hypervisor sees the complete request */
1674         mb();
1675         rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
1676                                 cpu_to_be64(remote_handle),
1677                                 ioba, num_entries);
1678
1679         if (rc) {
1680                 if (rc == H_CLOSED)
1681                         dev_warn(dev, "CRQ Queue closed\n");
1682                 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
1683         }
1684
1685         return rc;
1686 }
1687
1688 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
1689                             union ibmvnic_crq *crq)
1690 {
1691         unsigned int ua = adapter->vdev->unit_address;
1692         struct device *dev = &adapter->vdev->dev;
1693         u64 *u64_crq = (u64 *)crq;
1694         int rc;
1695
1696         netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
1697                    (unsigned long int)cpu_to_be64(u64_crq[0]),
1698                    (unsigned long int)cpu_to_be64(u64_crq[1]));
1699
1700         /* Make sure the hypervisor sees the complete request */
1701         mb();
1702
1703         rc = plpar_hcall_norets(H_SEND_CRQ, ua,
1704                                 cpu_to_be64(u64_crq[0]),
1705                                 cpu_to_be64(u64_crq[1]));
1706
1707         if (rc) {
1708                 if (rc == H_CLOSED)
1709                         dev_warn(dev, "CRQ Queue closed\n");
1710                 dev_warn(dev, "Send error (rc=%d)\n", rc);
1711         }
1712
1713         return rc;
1714 }
1715
1716 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
1717 {
1718         union ibmvnic_crq crq;
1719
1720         memset(&crq, 0, sizeof(crq));
1721         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1722         crq.generic.cmd = IBMVNIC_CRQ_INIT;
1723         netdev_dbg(adapter->netdev, "Sending CRQ init\n");
1724
1725         return ibmvnic_send_crq(adapter, &crq);
1726 }
1727
1728 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter)
1729 {
1730         union ibmvnic_crq crq;
1731
1732         memset(&crq, 0, sizeof(crq));
1733         crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
1734         crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
1735         netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
1736
1737         return ibmvnic_send_crq(adapter, &crq);
1738 }
1739
1740 static int send_version_xchg(struct ibmvnic_adapter *adapter)
1741 {
1742         union ibmvnic_crq crq;
1743
1744         memset(&crq, 0, sizeof(crq));
1745         crq.version_exchange.first = IBMVNIC_CRQ_CMD;
1746         crq.version_exchange.cmd = VERSION_EXCHANGE;
1747         crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
1748
1749         return ibmvnic_send_crq(adapter, &crq);
1750 }
1751
1752 static void send_login(struct ibmvnic_adapter *adapter)
1753 {
1754         struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
1755         struct ibmvnic_login_buffer *login_buffer;
1756         struct ibmvnic_inflight_cmd *inflight_cmd;
1757         struct device *dev = &adapter->vdev->dev;
1758         dma_addr_t rsp_buffer_token;
1759         dma_addr_t buffer_token;
1760         size_t rsp_buffer_size;
1761         union ibmvnic_crq crq;
1762         unsigned long flags;
1763         size_t buffer_size;
1764         __be64 *tx_list_p;
1765         __be64 *rx_list_p;
1766         int i;
1767
1768         buffer_size =
1769             sizeof(struct ibmvnic_login_buffer) +
1770             sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
1771
1772         login_buffer = kmalloc(buffer_size, GFP_ATOMIC);
1773         if (!login_buffer)
1774                 goto buf_alloc_failed;
1775
1776         buffer_token = dma_map_single(dev, login_buffer, buffer_size,
1777                                       DMA_TO_DEVICE);
1778         if (dma_mapping_error(dev, buffer_token)) {
1779                 dev_err(dev, "Couldn't map login buffer\n");
1780                 goto buf_map_failed;
1781         }
1782
1783         rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
1784                           sizeof(u64) * adapter->req_tx_queues +
1785                           sizeof(u64) * adapter->req_rx_queues +
1786                           sizeof(u64) * adapter->req_rx_queues +
1787                           sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
1788
1789         login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
1790         if (!login_rsp_buffer)
1791                 goto buf_rsp_alloc_failed;
1792
1793         rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
1794                                           rsp_buffer_size, DMA_FROM_DEVICE);
1795         if (dma_mapping_error(dev, rsp_buffer_token)) {
1796                 dev_err(dev, "Couldn't map login rsp buffer\n");
1797                 goto buf_rsp_map_failed;
1798         }
1799         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
1800         if (!inflight_cmd) {
1801                 dev_err(dev, "Couldn't allocate inflight_cmd\n");
1802                 goto inflight_alloc_failed;
1803         }
1804         adapter->login_buf = login_buffer;
1805         adapter->login_buf_token = buffer_token;
1806         adapter->login_buf_sz = buffer_size;
1807         adapter->login_rsp_buf = login_rsp_buffer;
1808         adapter->login_rsp_buf_token = rsp_buffer_token;
1809         adapter->login_rsp_buf_sz = rsp_buffer_size;
1810
1811         login_buffer->len = cpu_to_be32(buffer_size);
1812         login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
1813         login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
1814         login_buffer->off_txcomp_subcrqs =
1815             cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
1816         login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
1817         login_buffer->off_rxcomp_subcrqs =
1818             cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
1819                         sizeof(u64) * adapter->req_tx_queues);
1820         login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
1821         login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
1822
1823         tx_list_p = (__be64 *)((char *)login_buffer +
1824                                       sizeof(struct ibmvnic_login_buffer));
1825         rx_list_p = (__be64 *)((char *)login_buffer +
1826                                       sizeof(struct ibmvnic_login_buffer) +
1827                                       sizeof(u64) * adapter->req_tx_queues);
1828
1829         for (i = 0; i < adapter->req_tx_queues; i++) {
1830                 if (adapter->tx_scrq[i]) {
1831                         tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
1832                                                    crq_num);
1833                 }
1834         }
1835
1836         for (i = 0; i < adapter->req_rx_queues; i++) {
1837                 if (adapter->rx_scrq[i]) {
1838                         rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
1839                                                    crq_num);
1840                 }
1841         }
1842
1843         netdev_dbg(adapter->netdev, "Login Buffer:\n");
1844         for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
1845                 netdev_dbg(adapter->netdev, "%016lx\n",
1846                            ((unsigned long int *)(adapter->login_buf))[i]);
1847         }
1848
1849         memset(&crq, 0, sizeof(crq));
1850         crq.login.first = IBMVNIC_CRQ_CMD;
1851         crq.login.cmd = LOGIN;
1852         crq.login.ioba = cpu_to_be32(buffer_token);
1853         crq.login.len = cpu_to_be32(buffer_size);
1854
1855         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
1856
1857         spin_lock_irqsave(&adapter->inflight_lock, flags);
1858         list_add_tail(&inflight_cmd->list, &adapter->inflight);
1859         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
1860
1861         ibmvnic_send_crq(adapter, &crq);
1862
1863         return;
1864
1865 inflight_alloc_failed:
1866         dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
1867                          DMA_FROM_DEVICE);
1868 buf_rsp_map_failed:
1869         kfree(login_rsp_buffer);
1870 buf_rsp_alloc_failed:
1871         dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
1872 buf_map_failed:
1873         kfree(login_buffer);
1874 buf_alloc_failed:
1875         return;
1876 }
1877
1878 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
1879                              u32 len, u8 map_id)
1880 {
1881         union ibmvnic_crq crq;
1882
1883         memset(&crq, 0, sizeof(crq));
1884         crq.request_map.first = IBMVNIC_CRQ_CMD;
1885         crq.request_map.cmd = REQUEST_MAP;
1886         crq.request_map.map_id = map_id;
1887         crq.request_map.ioba = cpu_to_be32(addr);
1888         crq.request_map.len = cpu_to_be32(len);
1889         ibmvnic_send_crq(adapter, &crq);
1890 }
1891
1892 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
1893 {
1894         union ibmvnic_crq crq;
1895
1896         memset(&crq, 0, sizeof(crq));
1897         crq.request_unmap.first = IBMVNIC_CRQ_CMD;
1898         crq.request_unmap.cmd = REQUEST_UNMAP;
1899         crq.request_unmap.map_id = map_id;
1900         ibmvnic_send_crq(adapter, &crq);
1901 }
1902
1903 static void send_map_query(struct ibmvnic_adapter *adapter)
1904 {
1905         union ibmvnic_crq crq;
1906
1907         memset(&crq, 0, sizeof(crq));
1908         crq.query_map.first = IBMVNIC_CRQ_CMD;
1909         crq.query_map.cmd = QUERY_MAP;
1910         ibmvnic_send_crq(adapter, &crq);
1911 }
1912
1913 /* Send a series of CRQs requesting various capabilities of the VNIC server */
1914 static void send_cap_queries(struct ibmvnic_adapter *adapter)
1915 {
1916         union ibmvnic_crq crq;
1917
1918         atomic_set(&adapter->running_cap_queries, 0);
1919         memset(&crq, 0, sizeof(crq));
1920         crq.query_capability.first = IBMVNIC_CRQ_CMD;
1921         crq.query_capability.cmd = QUERY_CAPABILITY;
1922
1923         crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
1924         atomic_inc(&adapter->running_cap_queries);
1925         ibmvnic_send_crq(adapter, &crq);
1926
1927         crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
1928         atomic_inc(&adapter->running_cap_queries);
1929         ibmvnic_send_crq(adapter, &crq);
1930
1931         crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
1932         atomic_inc(&adapter->running_cap_queries);
1933         ibmvnic_send_crq(adapter, &crq);
1934
1935         crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
1936         atomic_inc(&adapter->running_cap_queries);
1937         ibmvnic_send_crq(adapter, &crq);
1938
1939         crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
1940         atomic_inc(&adapter->running_cap_queries);
1941         ibmvnic_send_crq(adapter, &crq);
1942
1943         crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
1944         atomic_inc(&adapter->running_cap_queries);
1945         ibmvnic_send_crq(adapter, &crq);
1946
1947         crq.query_capability.capability =
1948             cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
1949         atomic_inc(&adapter->running_cap_queries);
1950         ibmvnic_send_crq(adapter, &crq);
1951
1952         crq.query_capability.capability =
1953             cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
1954         atomic_inc(&adapter->running_cap_queries);
1955         ibmvnic_send_crq(adapter, &crq);
1956
1957         crq.query_capability.capability =
1958             cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
1959         atomic_inc(&adapter->running_cap_queries);
1960         ibmvnic_send_crq(adapter, &crq);
1961
1962         crq.query_capability.capability =
1963             cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
1964         atomic_inc(&adapter->running_cap_queries);
1965         ibmvnic_send_crq(adapter, &crq);
1966
1967         crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
1968         atomic_inc(&adapter->running_cap_queries);
1969         ibmvnic_send_crq(adapter, &crq);
1970
1971         crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
1972         atomic_inc(&adapter->running_cap_queries);
1973         ibmvnic_send_crq(adapter, &crq);
1974
1975         crq.query_capability.capability = cpu_to_be16(MIN_MTU);
1976         atomic_inc(&adapter->running_cap_queries);
1977         ibmvnic_send_crq(adapter, &crq);
1978
1979         crq.query_capability.capability = cpu_to_be16(MAX_MTU);
1980         atomic_inc(&adapter->running_cap_queries);
1981         ibmvnic_send_crq(adapter, &crq);
1982
1983         crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
1984         atomic_inc(&adapter->running_cap_queries);
1985         ibmvnic_send_crq(adapter, &crq);
1986
1987         crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
1988         atomic_inc(&adapter->running_cap_queries);
1989         ibmvnic_send_crq(adapter, &crq);
1990
1991         crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
1992         atomic_inc(&adapter->running_cap_queries);
1993         ibmvnic_send_crq(adapter, &crq);
1994
1995         crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
1996         atomic_inc(&adapter->running_cap_queries);
1997         ibmvnic_send_crq(adapter, &crq);
1998
1999         crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
2000         atomic_inc(&adapter->running_cap_queries);
2001         ibmvnic_send_crq(adapter, &crq);
2002
2003         crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
2004         atomic_inc(&adapter->running_cap_queries);
2005         ibmvnic_send_crq(adapter, &crq);
2006
2007         crq.query_capability.capability =
2008                         cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
2009         atomic_inc(&adapter->running_cap_queries);
2010         ibmvnic_send_crq(adapter, &crq);
2011
2012         crq.query_capability.capability =
2013                         cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
2014         atomic_inc(&adapter->running_cap_queries);
2015         ibmvnic_send_crq(adapter, &crq);
2016
2017         crq.query_capability.capability =
2018                         cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
2019         atomic_inc(&adapter->running_cap_queries);
2020         ibmvnic_send_crq(adapter, &crq);
2021
2022         crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
2023         atomic_inc(&adapter->running_cap_queries);
2024         ibmvnic_send_crq(adapter, &crq);
2025 }
2026
2027 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
2028 {
2029         struct device *dev = &adapter->vdev->dev;
2030         struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
2031         union ibmvnic_crq crq;
2032         int i;
2033
2034         dma_unmap_single(dev, adapter->ip_offload_tok,
2035                          sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
2036
2037         netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
2038         for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
2039                 netdev_dbg(adapter->netdev, "%016lx\n",
2040                            ((unsigned long int *)(buf))[i]);
2041
2042         netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
2043         netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
2044         netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
2045                    buf->tcp_ipv4_chksum);
2046         netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
2047                    buf->tcp_ipv6_chksum);
2048         netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
2049                    buf->udp_ipv4_chksum);
2050         netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
2051                    buf->udp_ipv6_chksum);
2052         netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
2053                    buf->large_tx_ipv4);
2054         netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
2055                    buf->large_tx_ipv6);
2056         netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
2057                    buf->large_rx_ipv4);
2058         netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
2059                    buf->large_rx_ipv6);
2060         netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
2061                    buf->max_ipv4_header_size);
2062         netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
2063                    buf->max_ipv6_header_size);
2064         netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
2065                    buf->max_tcp_header_size);
2066         netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
2067                    buf->max_udp_header_size);
2068         netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
2069                    buf->max_large_tx_size);
2070         netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
2071                    buf->max_large_rx_size);
2072         netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
2073                    buf->ipv6_extension_header);
2074         netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
2075                    buf->tcp_pseudosum_req);
2076         netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
2077                    buf->num_ipv6_ext_headers);
2078         netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
2079                    buf->off_ipv6_ext_headers);
2080
2081         adapter->ip_offload_ctrl_tok =
2082             dma_map_single(dev, &adapter->ip_offload_ctrl,
2083                            sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
2084
2085         if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
2086                 dev_err(dev, "Couldn't map ip offload control buffer\n");
2087                 return;
2088         }
2089
2090         adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
2091         adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
2092         adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
2093         adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
2094         adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
2095
2096         /* large_tx/rx disabled for now, additional features needed */
2097         adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
2098         adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
2099         adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
2100         adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
2101
2102         adapter->netdev->features = NETIF_F_GSO;
2103
2104         if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
2105                 adapter->netdev->features |= NETIF_F_IP_CSUM;
2106
2107         if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
2108                 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
2109
2110         if ((adapter->netdev->features &
2111             (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
2112                 adapter->netdev->features |= NETIF_F_RXCSUM;
2113
2114         memset(&crq, 0, sizeof(crq));
2115         crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
2116         crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
2117         crq.control_ip_offload.len =
2118             cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
2119         crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
2120         ibmvnic_send_crq(adapter, &crq);
2121 }
2122
2123 static void handle_error_info_rsp(union ibmvnic_crq *crq,
2124                                   struct ibmvnic_adapter *adapter)
2125 {
2126         struct device *dev = &adapter->vdev->dev;
2127         struct ibmvnic_error_buff *error_buff, *tmp;
2128         unsigned long flags;
2129         bool found = false;
2130         int i;
2131
2132         if (!crq->request_error_rsp.rc.code) {
2133                 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
2134                          crq->request_error_rsp.rc.code);
2135                 return;
2136         }
2137
2138         spin_lock_irqsave(&adapter->error_list_lock, flags);
2139         list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
2140                 if (error_buff->error_id == crq->request_error_rsp.error_id) {
2141                         found = true;
2142                         list_del(&error_buff->list);
2143                         break;
2144                 }
2145         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2146
2147         if (!found) {
2148                 dev_err(dev, "Couldn't find error id %x\n",
2149                         crq->request_error_rsp.error_id);
2150                 return;
2151         }
2152
2153         dev_err(dev, "Detailed info for error id %x:",
2154                 crq->request_error_rsp.error_id);
2155
2156         for (i = 0; i < error_buff->len; i++) {
2157                 pr_cont("%02x", (int)error_buff->buff[i]);
2158                 if (i % 8 == 7)
2159                         pr_cont(" ");
2160         }
2161         pr_cont("\n");
2162
2163         dma_unmap_single(dev, error_buff->dma, error_buff->len,
2164                          DMA_FROM_DEVICE);
2165         kfree(error_buff->buff);
2166         kfree(error_buff);
2167 }
2168
2169 static void handle_dump_size_rsp(union ibmvnic_crq *crq,
2170                                  struct ibmvnic_adapter *adapter)
2171 {
2172         int len = be32_to_cpu(crq->request_dump_size_rsp.len);
2173         struct ibmvnic_inflight_cmd *inflight_cmd;
2174         struct device *dev = &adapter->vdev->dev;
2175         union ibmvnic_crq newcrq;
2176         unsigned long flags;
2177
2178         /* allocate and map buffer */
2179         adapter->dump_data = kmalloc(len, GFP_KERNEL);
2180         if (!adapter->dump_data) {
2181                 complete(&adapter->fw_done);
2182                 return;
2183         }
2184
2185         adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
2186                                                   DMA_FROM_DEVICE);
2187
2188         if (dma_mapping_error(dev, adapter->dump_data_token)) {
2189                 if (!firmware_has_feature(FW_FEATURE_CMO))
2190                         dev_err(dev, "Couldn't map dump data\n");
2191                 kfree(adapter->dump_data);
2192                 complete(&adapter->fw_done);
2193                 return;
2194         }
2195
2196         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2197         if (!inflight_cmd) {
2198                 dma_unmap_single(dev, adapter->dump_data_token, len,
2199                                  DMA_FROM_DEVICE);
2200                 kfree(adapter->dump_data);
2201                 complete(&adapter->fw_done);
2202                 return;
2203         }
2204
2205         memset(&newcrq, 0, sizeof(newcrq));
2206         newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
2207         newcrq.request_dump.cmd = REQUEST_DUMP;
2208         newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
2209         newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
2210
2211         memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
2212
2213         spin_lock_irqsave(&adapter->inflight_lock, flags);
2214         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2215         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2216
2217         ibmvnic_send_crq(adapter, &newcrq);
2218 }
2219
2220 static void handle_error_indication(union ibmvnic_crq *crq,
2221                                     struct ibmvnic_adapter *adapter)
2222 {
2223         int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
2224         struct ibmvnic_inflight_cmd *inflight_cmd;
2225         struct device *dev = &adapter->vdev->dev;
2226         struct ibmvnic_error_buff *error_buff;
2227         union ibmvnic_crq new_crq;
2228         unsigned long flags;
2229
2230         dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
2231                 crq->error_indication.
2232                     flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
2233                 crq->error_indication.error_id,
2234                 crq->error_indication.error_cause);
2235
2236         error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
2237         if (!error_buff)
2238                 return;
2239
2240         error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
2241         if (!error_buff->buff) {
2242                 kfree(error_buff);
2243                 return;
2244         }
2245
2246         error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
2247                                          DMA_FROM_DEVICE);
2248         if (dma_mapping_error(dev, error_buff->dma)) {
2249                 if (!firmware_has_feature(FW_FEATURE_CMO))
2250                         dev_err(dev, "Couldn't map error buffer\n");
2251                 kfree(error_buff->buff);
2252                 kfree(error_buff);
2253                 return;
2254         }
2255
2256         inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
2257         if (!inflight_cmd) {
2258                 dma_unmap_single(dev, error_buff->dma, detail_len,
2259                                  DMA_FROM_DEVICE);
2260                 kfree(error_buff->buff);
2261                 kfree(error_buff);
2262                 return;
2263         }
2264
2265         error_buff->len = detail_len;
2266         error_buff->error_id = crq->error_indication.error_id;
2267
2268         spin_lock_irqsave(&adapter->error_list_lock, flags);
2269         list_add_tail(&error_buff->list, &adapter->errors);
2270         spin_unlock_irqrestore(&adapter->error_list_lock, flags);
2271
2272         memset(&new_crq, 0, sizeof(new_crq));
2273         new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
2274         new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
2275         new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
2276         new_crq.request_error_info.len = cpu_to_be32(detail_len);
2277         new_crq.request_error_info.error_id = crq->error_indication.error_id;
2278
2279         memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
2280
2281         spin_lock_irqsave(&adapter->inflight_lock, flags);
2282         list_add_tail(&inflight_cmd->list, &adapter->inflight);
2283         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
2284
2285         ibmvnic_send_crq(adapter, &new_crq);
2286 }
2287
2288 static void handle_change_mac_rsp(union ibmvnic_crq *crq,
2289                                   struct ibmvnic_adapter *adapter)
2290 {
2291         struct net_device *netdev = adapter->netdev;
2292         struct device *dev = &adapter->vdev->dev;
2293         long rc;
2294
2295         rc = crq->change_mac_addr_rsp.rc.code;
2296         if (rc) {
2297                 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
2298                 return;
2299         }
2300         memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
2301                ETH_ALEN);
2302 }
2303
2304 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
2305                                    struct ibmvnic_adapter *adapter)
2306 {
2307         struct device *dev = &adapter->vdev->dev;
2308         u64 *req_value;
2309         char *name;
2310
2311         switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
2312         case REQ_TX_QUEUES:
2313                 req_value = &adapter->req_tx_queues;
2314                 name = "tx";
2315                 break;
2316         case REQ_RX_QUEUES:
2317                 req_value = &adapter->req_rx_queues;
2318                 name = "rx";
2319                 break;
2320         case REQ_RX_ADD_QUEUES:
2321                 req_value = &adapter->req_rx_add_queues;
2322                 name = "rx_add";
2323                 break;
2324         case REQ_TX_ENTRIES_PER_SUBCRQ:
2325                 req_value = &adapter->req_tx_entries_per_subcrq;
2326                 name = "tx_entries_per_subcrq";
2327                 break;
2328         case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
2329                 req_value = &adapter->req_rx_add_entries_per_subcrq;
2330                 name = "rx_add_entries_per_subcrq";
2331                 break;
2332         case REQ_MTU:
2333                 req_value = &adapter->req_mtu;
2334                 name = "mtu";
2335                 break;
2336         case PROMISC_REQUESTED:
2337                 req_value = &adapter->promisc;
2338                 name = "promisc";
2339                 break;
2340         default:
2341                 dev_err(dev, "Got invalid cap request rsp %d\n",
2342                         crq->request_capability.capability);
2343                 return;
2344         }
2345
2346         switch (crq->request_capability_rsp.rc.code) {
2347         case SUCCESS:
2348                 break;
2349         case PARTIALSUCCESS:
2350                 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
2351                          *req_value,
2352                          (long int)be32_to_cpu(crq->request_capability_rsp.
2353                                                number), name);
2354                 release_sub_crqs(adapter);
2355                 *req_value = be32_to_cpu(crq->request_capability_rsp.number);
2356                 complete(&adapter->init_done);
2357                 return;
2358         default:
2359                 dev_err(dev, "Error %d in request cap rsp\n",
2360                         crq->request_capability_rsp.rc.code);
2361                 return;
2362         }
2363
2364         /* Done receiving requested capabilities, query IP offload support */
2365         if (++adapter->requested_caps == 7) {
2366                 union ibmvnic_crq newcrq;
2367                 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
2368                 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
2369                     &adapter->ip_offload_buf;
2370
2371                 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
2372                                                          buf_sz,
2373                                                          DMA_FROM_DEVICE);
2374
2375                 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
2376                         if (!firmware_has_feature(FW_FEATURE_CMO))
2377                                 dev_err(dev, "Couldn't map offload buffer\n");
2378                         return;
2379                 }
2380
2381                 memset(&newcrq, 0, sizeof(newcrq));
2382                 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
2383                 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
2384                 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
2385                 newcrq.query_ip_offload.ioba =
2386                     cpu_to_be32(adapter->ip_offload_tok);
2387
2388                 ibmvnic_send_crq(adapter, &newcrq);
2389         }
2390 }
2391
2392 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
2393                             struct ibmvnic_adapter *adapter)
2394 {
2395         struct device *dev = &adapter->vdev->dev;
2396         struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
2397         struct ibmvnic_login_buffer *login = adapter->login_buf;
2398         union ibmvnic_crq crq;
2399         int i;
2400
2401         dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
2402                          DMA_BIDIRECTIONAL);
2403         dma_unmap_single(dev, adapter->login_rsp_buf_token,
2404                          adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
2405
2406         /* If the number of queues requested can't be allocated by the
2407          * server, the login response will return with code 1. We will need
2408          * to resend the login buffer with fewer queues requested.
2409          */
2410         if (login_rsp_crq->generic.rc.code) {
2411                 adapter->renegotiate = true;
2412                 complete(&adapter->init_done);
2413                 return 0;
2414         }
2415
2416         netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
2417         for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
2418                 netdev_dbg(adapter->netdev, "%016lx\n",
2419                            ((unsigned long int *)(adapter->login_rsp_buf))[i]);
2420         }
2421
2422         /* Sanity checks */
2423         if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
2424             (be32_to_cpu(login->num_rxcomp_subcrqs) *
2425              adapter->req_rx_add_queues !=
2426              be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
2427                 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
2428                 ibmvnic_remove(adapter->vdev);
2429                 return -EIO;
2430         }
2431         complete(&adapter->init_done);
2432
2433         memset(&crq, 0, sizeof(crq));
2434         crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
2435         crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
2436         ibmvnic_send_crq(adapter, &crq);
2437
2438         return 0;
2439 }
2440
2441 static void handle_request_map_rsp(union ibmvnic_crq *crq,
2442                                    struct ibmvnic_adapter *adapter)
2443 {
2444         struct device *dev = &adapter->vdev->dev;
2445         u8 map_id = crq->request_map_rsp.map_id;
2446         int tx_subcrqs;
2447         int rx_subcrqs;
2448         long rc;
2449         int i;
2450
2451         tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
2452         rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
2453
2454         rc = crq->request_map_rsp.rc.code;
2455         if (rc) {
2456                 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
2457                 adapter->map_id--;
2458                 /* need to find and zero tx/rx_pool map_id */
2459                 for (i = 0; i < tx_subcrqs; i++) {
2460                         if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
2461                                 adapter->tx_pool[i].long_term_buff.map_id = 0;
2462                 }
2463                 for (i = 0; i < rx_subcrqs; i++) {
2464                         if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
2465                                 adapter->rx_pool[i].long_term_buff.map_id = 0;
2466                 }
2467         }
2468         complete(&adapter->fw_done);
2469 }
2470
2471 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
2472                                      struct ibmvnic_adapter *adapter)
2473 {
2474         struct device *dev = &adapter->vdev->dev;
2475         long rc;
2476
2477         rc = crq->request_unmap_rsp.rc.code;
2478         if (rc)
2479                 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
2480 }
2481
2482 static void handle_query_map_rsp(union ibmvnic_crq *crq,
2483                                  struct ibmvnic_adapter *adapter)
2484 {
2485         struct net_device *netdev = adapter->netdev;
2486         struct device *dev = &adapter->vdev->dev;
2487         long rc;
2488
2489         rc = crq->query_map_rsp.rc.code;
2490         if (rc) {
2491                 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
2492                 return;
2493         }
2494         netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
2495                    crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
2496                    crq->query_map_rsp.free_pages);
2497 }
2498
2499 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
2500                                  struct ibmvnic_adapter *adapter)
2501 {
2502         struct net_device *netdev = adapter->netdev;
2503         struct device *dev = &adapter->vdev->dev;
2504         long rc;
2505
2506         atomic_dec(&adapter->running_cap_queries);
2507         netdev_dbg(netdev, "Outstanding queries: %d\n",
2508                    atomic_read(&adapter->running_cap_queries));
2509         rc = crq->query_capability.rc.code;
2510         if (rc) {
2511                 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
2512                 goto out;
2513         }
2514
2515         switch (be16_to_cpu(crq->query_capability.capability)) {
2516         case MIN_TX_QUEUES:
2517                 adapter->min_tx_queues =
2518                     be64_to_cpu(crq->query_capability.number);
2519                 netdev_dbg(netdev, "min_tx_queues = %lld\n",
2520                            adapter->min_tx_queues);
2521                 break;
2522         case MIN_RX_QUEUES:
2523                 adapter->min_rx_queues =
2524                     be64_to_cpu(crq->query_capability.number);
2525                 netdev_dbg(netdev, "min_rx_queues = %lld\n",
2526                            adapter->min_rx_queues);
2527                 break;
2528         case MIN_RX_ADD_QUEUES:
2529                 adapter->min_rx_add_queues =
2530                     be64_to_cpu(crq->query_capability.number);
2531                 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
2532                            adapter->min_rx_add_queues);
2533                 break;
2534         case MAX_TX_QUEUES:
2535                 adapter->max_tx_queues =
2536                     be64_to_cpu(crq->query_capability.number);
2537                 netdev_dbg(netdev, "max_tx_queues = %lld\n",
2538                            adapter->max_tx_queues);
2539                 break;
2540         case MAX_RX_QUEUES:
2541                 adapter->max_rx_queues =
2542                     be64_to_cpu(crq->query_capability.number);
2543                 netdev_dbg(netdev, "max_rx_queues = %lld\n",
2544                            adapter->max_rx_queues);
2545                 break;
2546         case MAX_RX_ADD_QUEUES:
2547                 adapter->max_rx_add_queues =
2548                     be64_to_cpu(crq->query_capability.number);
2549                 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
2550                            adapter->max_rx_add_queues);
2551                 break;
2552         case MIN_TX_ENTRIES_PER_SUBCRQ:
2553                 adapter->min_tx_entries_per_subcrq =
2554                     be64_to_cpu(crq->query_capability.number);
2555                 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
2556                            adapter->min_tx_entries_per_subcrq);
2557                 break;
2558         case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
2559                 adapter->min_rx_add_entries_per_subcrq =
2560                     be64_to_cpu(crq->query_capability.number);
2561                 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
2562                            adapter->min_rx_add_entries_per_subcrq);
2563                 break;
2564         case MAX_TX_ENTRIES_PER_SUBCRQ:
2565                 adapter->max_tx_entries_per_subcrq =
2566                     be64_to_cpu(crq->query_capability.number);
2567                 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
2568                            adapter->max_tx_entries_per_subcrq);
2569                 break;
2570         case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
2571                 adapter->max_rx_add_entries_per_subcrq =
2572                     be64_to_cpu(crq->query_capability.number);
2573                 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
2574                            adapter->max_rx_add_entries_per_subcrq);
2575                 break;
2576         case TCP_IP_OFFLOAD:
2577                 adapter->tcp_ip_offload =
2578                     be64_to_cpu(crq->query_capability.number);
2579                 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
2580                            adapter->tcp_ip_offload);
2581                 break;
2582         case PROMISC_SUPPORTED:
2583                 adapter->promisc_supported =
2584                     be64_to_cpu(crq->query_capability.number);
2585                 netdev_dbg(netdev, "promisc_supported = %lld\n",
2586                            adapter->promisc_supported);
2587                 break;
2588         case MIN_MTU:
2589                 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
2590                 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
2591                 break;
2592         case MAX_MTU:
2593                 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
2594                 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
2595                 break;
2596         case MAX_MULTICAST_FILTERS:
2597                 adapter->max_multicast_filters =
2598                     be64_to_cpu(crq->query_capability.number);
2599                 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
2600                            adapter->max_multicast_filters);
2601                 break;
2602         case VLAN_HEADER_INSERTION:
2603                 adapter->vlan_header_insertion =
2604                     be64_to_cpu(crq->query_capability.number);
2605                 if (adapter->vlan_header_insertion)
2606                         netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
2607                 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
2608                            adapter->vlan_header_insertion);
2609                 break;
2610         case MAX_TX_SG_ENTRIES:
2611                 adapter->max_tx_sg_entries =
2612                     be64_to_cpu(crq->query_capability.number);
2613                 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
2614                            adapter->max_tx_sg_entries);
2615                 break;
2616         case RX_SG_SUPPORTED:
2617                 adapter->rx_sg_supported =
2618                     be64_to_cpu(crq->query_capability.number);
2619                 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
2620                            adapter->rx_sg_supported);
2621                 break;
2622         case OPT_TX_COMP_SUB_QUEUES:
2623                 adapter->opt_tx_comp_sub_queues =
2624                     be64_to_cpu(crq->query_capability.number);
2625                 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
2626                            adapter->opt_tx_comp_sub_queues);
2627                 break;
2628         case OPT_RX_COMP_QUEUES:
2629                 adapter->opt_rx_comp_queues =
2630                     be64_to_cpu(crq->query_capability.number);
2631                 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
2632                            adapter->opt_rx_comp_queues);
2633                 break;
2634         case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
2635                 adapter->opt_rx_bufadd_q_per_rx_comp_q =
2636                     be64_to_cpu(crq->query_capability.number);
2637                 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
2638                            adapter->opt_rx_bufadd_q_per_rx_comp_q);
2639                 break;
2640         case OPT_TX_ENTRIES_PER_SUBCRQ:
2641                 adapter->opt_tx_entries_per_subcrq =
2642                     be64_to_cpu(crq->query_capability.number);
2643                 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
2644                            adapter->opt_tx_entries_per_subcrq);
2645                 break;
2646         case OPT_RXBA_ENTRIES_PER_SUBCRQ:
2647                 adapter->opt_rxba_entries_per_subcrq =
2648                     be64_to_cpu(crq->query_capability.number);
2649                 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
2650                            adapter->opt_rxba_entries_per_subcrq);
2651                 break;
2652         case TX_RX_DESC_REQ:
2653                 adapter->tx_rx_desc_req = crq->query_capability.number;
2654                 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
2655                            adapter->tx_rx_desc_req);
2656                 break;
2657
2658         default:
2659                 netdev_err(netdev, "Got invalid cap rsp %d\n",
2660                            crq->query_capability.capability);
2661         }
2662
2663 out:
2664         if (atomic_read(&adapter->running_cap_queries) == 0)
2665                 complete(&adapter->init_done);
2666                 /* We're done querying the capabilities, initialize sub-crqs */
2667 }
2668
2669 static void handle_control_ras_rsp(union ibmvnic_crq *crq,
2670                                    struct ibmvnic_adapter *adapter)
2671 {
2672         u8 correlator = crq->control_ras_rsp.correlator;
2673         struct device *dev = &adapter->vdev->dev;
2674         bool found = false;
2675         int i;
2676
2677         if (crq->control_ras_rsp.rc.code) {
2678                 dev_warn(dev, "Control ras failed rc=%d\n",
2679                          crq->control_ras_rsp.rc.code);
2680                 return;
2681         }
2682
2683         for (i = 0; i < adapter->ras_comp_num; i++) {
2684                 if (adapter->ras_comps[i].correlator == correlator) {
2685                         found = true;
2686                         break;
2687                 }
2688         }
2689
2690         if (!found) {
2691                 dev_warn(dev, "Correlator not found on control_ras_rsp\n");
2692                 return;
2693         }
2694
2695         switch (crq->control_ras_rsp.op) {
2696         case IBMVNIC_TRACE_LEVEL:
2697                 adapter->ras_comps[i].trace_level = crq->control_ras.level;
2698                 break;
2699         case IBMVNIC_ERROR_LEVEL:
2700                 adapter->ras_comps[i].error_check_level =
2701                     crq->control_ras.level;
2702                 break;
2703         case IBMVNIC_TRACE_PAUSE:
2704                 adapter->ras_comp_int[i].paused = 1;
2705                 break;
2706         case IBMVNIC_TRACE_RESUME:
2707                 adapter->ras_comp_int[i].paused = 0;
2708                 break;
2709         case IBMVNIC_TRACE_ON:
2710                 adapter->ras_comps[i].trace_on = 1;
2711                 break;
2712         case IBMVNIC_TRACE_OFF:
2713                 adapter->ras_comps[i].trace_on = 0;
2714                 break;
2715         case IBMVNIC_CHG_TRACE_BUFF_SZ:
2716                 /* trace_buff_sz is 3 bytes, stuff it into an int */
2717                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
2718                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
2719                     crq->control_ras_rsp.trace_buff_sz[0];
2720                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
2721                     crq->control_ras_rsp.trace_buff_sz[1];
2722                 ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
2723                     crq->control_ras_rsp.trace_buff_sz[2];
2724                 break;
2725         default:
2726                 dev_err(dev, "invalid op %d on control_ras_rsp",
2727                         crq->control_ras_rsp.op);
2728         }
2729 }
2730
2731 static int ibmvnic_fw_comp_open(struct inode *inode, struct file *file)
2732 {
2733         file->private_data = inode->i_private;
2734         return 0;
2735 }
2736
2737 static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
2738                           loff_t *ppos)
2739 {
2740         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2741         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2742         struct device *dev = &adapter->vdev->dev;
2743         struct ibmvnic_fw_trace_entry *trace;
2744         int num = ras_comp_int->num;
2745         union ibmvnic_crq crq;
2746         dma_addr_t trace_tok;
2747
2748         if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2749                 return 0;
2750
2751         trace =
2752             dma_alloc_coherent(dev,
2753                                be32_to_cpu(adapter->ras_comps[num].
2754                                            trace_buff_size), &trace_tok,
2755                                GFP_KERNEL);
2756         if (!trace) {
2757                 dev_err(dev, "Couldn't alloc trace buffer\n");
2758                 return 0;
2759         }
2760
2761         memset(&crq, 0, sizeof(crq));
2762         crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
2763         crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
2764         crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
2765         crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
2766         crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
2767         ibmvnic_send_crq(adapter, &crq);
2768
2769         init_completion(&adapter->fw_done);
2770         wait_for_completion(&adapter->fw_done);
2771
2772         if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
2773                 len =
2774                     be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
2775                     *ppos;
2776
2777         copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
2778
2779         dma_free_coherent(dev,
2780                           be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
2781                           trace, trace_tok);
2782         *ppos += len;
2783         return len;
2784 }
2785
2786 static const struct file_operations trace_ops = {
2787         .owner          = THIS_MODULE,
2788         .open           = ibmvnic_fw_comp_open,
2789         .read           = trace_read,
2790 };
2791
2792 static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
2793                            loff_t *ppos)
2794 {
2795         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2796         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2797         int num = ras_comp_int->num;
2798         char buff[5]; /*  1 or 0 plus \n and \0 */
2799         int size;
2800
2801         size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
2802
2803         if (*ppos >= size)
2804                 return 0;
2805
2806         copy_to_user(user_buf, buff, size);
2807         *ppos += size;
2808         return size;
2809 }
2810
2811 static ssize_t paused_write(struct file *file, const char __user *user_buf,
2812                             size_t len, loff_t *ppos)
2813 {
2814         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2815         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2816         int num = ras_comp_int->num;
2817         union ibmvnic_crq crq;
2818         unsigned long val;
2819         char buff[9]; /* decimal max int plus \n and \0 */
2820
2821         copy_from_user(buff, user_buf, sizeof(buff));
2822         val = kstrtoul(buff, 10, NULL);
2823
2824         adapter->ras_comp_int[num].paused = val ? 1 : 0;
2825
2826         memset(&crq, 0, sizeof(crq));
2827         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2828         crq.control_ras.cmd = CONTROL_RAS;
2829         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2830         crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
2831         ibmvnic_send_crq(adapter, &crq);
2832
2833         return len;
2834 }
2835
2836 static const struct file_operations paused_ops = {
2837         .owner          = THIS_MODULE,
2838         .open           = ibmvnic_fw_comp_open,
2839         .read           = paused_read,
2840         .write          = paused_write,
2841 };
2842
2843 static ssize_t tracing_read(struct file *file, char __user *user_buf,
2844                             size_t len, loff_t *ppos)
2845 {
2846         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2847         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2848         int num = ras_comp_int->num;
2849         char buff[5]; /*  1 or 0 plus \n and \0 */
2850         int size;
2851
2852         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
2853
2854         if (*ppos >= size)
2855                 return 0;
2856
2857         copy_to_user(user_buf, buff, size);
2858         *ppos += size;
2859         return size;
2860 }
2861
2862 static ssize_t tracing_write(struct file *file, const char __user *user_buf,
2863                              size_t len, loff_t *ppos)
2864 {
2865         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2866         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2867         int num = ras_comp_int->num;
2868         union ibmvnic_crq crq;
2869         unsigned long val;
2870         char buff[9]; /* decimal max int plus \n and \0 */
2871
2872         copy_from_user(buff, user_buf, sizeof(buff));
2873         val = kstrtoul(buff, 10, NULL);
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_ON : IBMVNIC_TRACE_OFF;
2880
2881         return len;
2882 }
2883
2884 static const struct file_operations tracing_ops = {
2885         .owner          = THIS_MODULE,
2886         .open           = ibmvnic_fw_comp_open,
2887         .read           = tracing_read,
2888         .write          = tracing_write,
2889 };
2890
2891 static ssize_t error_level_read(struct file *file, char __user *user_buf,
2892                                 size_t len, loff_t *ppos)
2893 {
2894         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2895         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2896         int num = ras_comp_int->num;
2897         char buff[5]; /* decimal max char plus \n and \0 */
2898         int size;
2899
2900         size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
2901
2902         if (*ppos >= size)
2903                 return 0;
2904
2905         copy_to_user(user_buf, buff, size);
2906         *ppos += size;
2907         return size;
2908 }
2909
2910 static ssize_t error_level_write(struct file *file, const char __user *user_buf,
2911                                  size_t len, loff_t *ppos)
2912 {
2913         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2914         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2915         int num = ras_comp_int->num;
2916         union ibmvnic_crq crq;
2917         unsigned long val;
2918         char buff[9]; /* decimal max int plus \n and \0 */
2919
2920         copy_from_user(buff, user_buf, sizeof(buff));
2921         val = kstrtoul(buff, 10, NULL);
2922
2923         if (val > 9)
2924                 val = 9;
2925
2926         memset(&crq, 0, sizeof(crq));
2927         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2928         crq.control_ras.cmd = CONTROL_RAS;
2929         crq.control_ras.correlator = adapter->ras_comps[num].correlator;
2930         crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
2931         crq.control_ras.level = val;
2932         ibmvnic_send_crq(adapter, &crq);
2933
2934         return len;
2935 }
2936
2937 static const struct file_operations error_level_ops = {
2938         .owner          = THIS_MODULE,
2939         .open           = ibmvnic_fw_comp_open,
2940         .read           = error_level_read,
2941         .write          = error_level_write,
2942 };
2943
2944 static ssize_t trace_level_read(struct file *file, char __user *user_buf,
2945                                 size_t len, loff_t *ppos)
2946 {
2947         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2948         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2949         int num = ras_comp_int->num;
2950         char buff[5]; /* decimal max char plus \n and \0 */
2951         int size;
2952
2953         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
2954         if (*ppos >= size)
2955                 return 0;
2956
2957         copy_to_user(user_buf, buff, size);
2958         *ppos += size;
2959         return size;
2960 }
2961
2962 static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
2963                                  size_t len, loff_t *ppos)
2964 {
2965         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2966         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
2967         union ibmvnic_crq crq;
2968         unsigned long val;
2969         char buff[9]; /* decimal max int plus \n and \0 */
2970
2971         copy_from_user(buff, user_buf, sizeof(buff));
2972         val = kstrtoul(buff, 10, NULL);
2973         if (val > 9)
2974                 val = 9;
2975
2976         memset(&crq, 0, sizeof(crq));
2977         crq.control_ras.first = IBMVNIC_CRQ_CMD;
2978         crq.control_ras.cmd = CONTROL_RAS;
2979         crq.control_ras.correlator =
2980             adapter->ras_comps[ras_comp_int->num].correlator;
2981         crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
2982         crq.control_ras.level = val;
2983         ibmvnic_send_crq(adapter, &crq);
2984
2985         return len;
2986 }
2987
2988 static const struct file_operations trace_level_ops = {
2989         .owner          = THIS_MODULE,
2990         .open           = ibmvnic_fw_comp_open,
2991         .read           = trace_level_read,
2992         .write          = trace_level_write,
2993 };
2994
2995 static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
2996                                     size_t len, loff_t *ppos)
2997 {
2998         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
2999         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3000         int num = ras_comp_int->num;
3001         char buff[9]; /* decimal max int plus \n and \0 */
3002         int size;
3003
3004         size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
3005         if (*ppos >= size)
3006                 return 0;
3007
3008         copy_to_user(user_buf, buff, size);
3009         *ppos += size;
3010         return size;
3011 }
3012
3013 static ssize_t trace_buff_size_write(struct file *file,
3014                                      const char __user *user_buf, size_t len,
3015                                      loff_t *ppos)
3016 {
3017         struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
3018         struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
3019         union ibmvnic_crq crq;
3020         unsigned long val;
3021         char buff[9]; /* decimal max int plus \n and \0 */
3022
3023         copy_from_user(buff, user_buf, sizeof(buff));
3024         val = kstrtoul(buff, 10, NULL);
3025
3026         memset(&crq, 0, sizeof(crq));
3027         crq.control_ras.first = IBMVNIC_CRQ_CMD;
3028         crq.control_ras.cmd = CONTROL_RAS;
3029         crq.control_ras.correlator =
3030             adapter->ras_comps[ras_comp_int->num].correlator;
3031         crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
3032         /* trace_buff_sz is 3 bytes, stuff an int into it */
3033         crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
3034         crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
3035         crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
3036         ibmvnic_send_crq(adapter, &crq);
3037
3038         return len;
3039 }
3040
3041 static const struct file_operations trace_size_ops = {
3042         .owner          = THIS_MODULE,
3043         .open           = ibmvnic_fw_comp_open,
3044         .read           = trace_buff_size_read,
3045         .write          = trace_buff_size_write,
3046 };
3047
3048 static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
3049                                          struct ibmvnic_adapter *adapter)
3050 {
3051         struct device *dev = &adapter->vdev->dev;
3052         struct dentry *dir_ent;
3053         struct dentry *ent;
3054         int i;
3055
3056         debugfs_remove_recursive(adapter->ras_comps_ent);
3057
3058         adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
3059                                                     adapter->debugfs_dir);
3060         if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
3061                 dev_info(dev, "debugfs create ras_comps dir failed\n");
3062                 return;
3063         }
3064
3065         for (i = 0; i < adapter->ras_comp_num; i++) {
3066                 dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
3067                                              adapter->ras_comps_ent);
3068                 if (!dir_ent || IS_ERR(dir_ent)) {
3069                         dev_info(dev, "debugfs create %s dir failed\n",
3070                                  adapter->ras_comps[i].name);
3071                         continue;
3072                 }
3073
3074                 adapter->ras_comp_int[i].adapter = adapter;
3075                 adapter->ras_comp_int[i].num = i;
3076                 adapter->ras_comp_int[i].desc_blob.data =
3077                     &adapter->ras_comps[i].description;
3078                 adapter->ras_comp_int[i].desc_blob.size =
3079                     sizeof(adapter->ras_comps[i].description);
3080
3081                 /* Don't need to remember the dentry's because the debugfs dir
3082                  * gets removed recursively
3083                  */
3084                 ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
3085                                           &adapter->ras_comp_int[i].desc_blob);
3086                 ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
3087                                           dir_ent, &adapter->ras_comp_int[i],
3088                                           &trace_size_ops);
3089                 ent = debugfs_create_file("trace_level",
3090                                           S_IRUGO |
3091                                           (adapter->ras_comps[i].trace_level !=
3092                                            0xFF  ? S_IWUSR : 0),
3093                                            dir_ent, &adapter->ras_comp_int[i],
3094                                            &trace_level_ops);
3095                 ent = debugfs_create_file("error_level",
3096                                           S_IRUGO |
3097                                           (adapter->
3098                                            ras_comps[i].error_check_level !=
3099                                            0xFF ? S_IWUSR : 0),
3100                                           dir_ent, &adapter->ras_comp_int[i],
3101                                           &trace_level_ops);
3102                 ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
3103                                           dir_ent, &adapter->ras_comp_int[i],
3104                                           &tracing_ops);
3105                 ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
3106                                           dir_ent, &adapter->ras_comp_int[i],
3107                                           &paused_ops);
3108                 ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
3109                                           &adapter->ras_comp_int[i],
3110                                           &trace_ops);
3111         }
3112 }
3113
3114 static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
3115                                             struct ibmvnic_adapter *adapter)
3116 {
3117         int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
3118         struct device *dev = &adapter->vdev->dev;
3119         union ibmvnic_crq newcrq;
3120
3121         adapter->ras_comps = dma_alloc_coherent(dev, len,
3122                                                 &adapter->ras_comps_tok,
3123                                                 GFP_KERNEL);
3124         if (!adapter->ras_comps) {
3125                 if (!firmware_has_feature(FW_FEATURE_CMO))
3126                         dev_err(dev, "Couldn't alloc fw comps buffer\n");
3127                 return;
3128         }
3129
3130         adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
3131                                         sizeof(struct ibmvnic_fw_comp_internal),
3132                                         GFP_KERNEL);
3133         if (!adapter->ras_comp_int)
3134                 dma_free_coherent(dev, len, adapter->ras_comps,
3135                                   adapter->ras_comps_tok);
3136
3137         memset(&newcrq, 0, sizeof(newcrq));
3138         newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
3139         newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
3140         newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
3141         newcrq.request_ras_comps.len = cpu_to_be32(len);
3142         ibmvnic_send_crq(adapter, &newcrq);
3143 }
3144
3145 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
3146 {
3147         struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1;
3148         struct device *dev = &adapter->vdev->dev;
3149         struct ibmvnic_error_buff *error_buff, *tmp2;
3150         unsigned long flags;
3151         unsigned long flags2;
3152
3153         spin_lock_irqsave(&adapter->inflight_lock, flags);
3154         list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) {
3155                 switch (inflight_cmd->crq.generic.cmd) {
3156                 case LOGIN:
3157                         dma_unmap_single(dev, adapter->login_buf_token,
3158                                          adapter->login_buf_sz,
3159                                          DMA_BIDIRECTIONAL);
3160                         dma_unmap_single(dev, adapter->login_rsp_buf_token,
3161                                          adapter->login_rsp_buf_sz,
3162                                          DMA_BIDIRECTIONAL);
3163                         kfree(adapter->login_rsp_buf);
3164                         kfree(adapter->login_buf);
3165                         break;
3166                 case REQUEST_DUMP:
3167                         complete(&adapter->fw_done);
3168                         break;
3169                 case REQUEST_ERROR_INFO:
3170                         spin_lock_irqsave(&adapter->error_list_lock, flags2);
3171                         list_for_each_entry_safe(error_buff, tmp2,
3172                                                  &adapter->errors, list) {
3173                                 dma_unmap_single(dev, error_buff->dma,
3174                                                  error_buff->len,
3175                                                  DMA_FROM_DEVICE);
3176                                 kfree(error_buff->buff);
3177                                 list_del(&error_buff->list);
3178                                 kfree(error_buff);
3179                         }
3180                         spin_unlock_irqrestore(&adapter->error_list_lock,
3181                                                flags2);
3182                         break;
3183                 }
3184                 list_del(&inflight_cmd->list);
3185                 kfree(inflight_cmd);
3186         }
3187         spin_unlock_irqrestore(&adapter->inflight_lock, flags);
3188 }
3189
3190 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3191                                struct ibmvnic_adapter *adapter)
3192 {
3193         struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3194         struct net_device *netdev = adapter->netdev;
3195         struct device *dev = &adapter->vdev->dev;
3196         long rc;
3197
3198         netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3199                    ((unsigned long int *)crq)[0],
3200                    ((unsigned long int *)crq)[1]);
3201         switch (gen_crq->first) {
3202         case IBMVNIC_CRQ_INIT_RSP:
3203                 switch (gen_crq->cmd) {
3204                 case IBMVNIC_CRQ_INIT:
3205                         dev_info(dev, "Partner initialized\n");
3206                         /* Send back a response */
3207                         rc = ibmvnic_send_crq_init_complete(adapter);
3208                         if (rc == 0)
3209                                 send_version_xchg(adapter);
3210                         else
3211                                 dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
3212                         break;
3213                 case IBMVNIC_CRQ_INIT_COMPLETE:
3214                         dev_info(dev, "Partner initialization complete\n");
3215                         send_version_xchg(adapter);
3216                         break;
3217                 default:
3218                         dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3219                 }
3220                 return;
3221         case IBMVNIC_CRQ_XPORT_EVENT:
3222                 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3223                         dev_info(dev, "Re-enabling adapter\n");
3224                         adapter->migrated = true;
3225                         ibmvnic_free_inflight(adapter);
3226                         release_sub_crqs(adapter);
3227                         rc = ibmvnic_reenable_crq_queue(adapter);
3228                         if (rc)
3229                                 dev_err(dev, "Error after enable rc=%ld\n", rc);
3230                         adapter->migrated = false;
3231                         rc = ibmvnic_send_crq_init(adapter);
3232                         if (rc)
3233                                 dev_err(dev, "Error sending init rc=%ld\n", rc);
3234                 } else {
3235                         /* The adapter lost the connection */
3236                         dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3237                                 gen_crq->cmd);
3238                         ibmvnic_free_inflight(adapter);
3239                         release_sub_crqs(adapter);
3240                 }
3241                 return;
3242         case IBMVNIC_CRQ_CMD_RSP:
3243                 break;
3244         default:
3245                 dev_err(dev, "Got an invalid msg type 0x%02x\n",
3246                         gen_crq->first);
3247                 return;
3248         }
3249
3250         switch (gen_crq->cmd) {
3251         case VERSION_EXCHANGE_RSP:
3252                 rc = crq->version_exchange_rsp.rc.code;
3253                 if (rc) {
3254                         dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
3255                         break;
3256                 }
3257                 dev_info(dev, "Partner protocol version is %d\n",
3258                          crq->version_exchange_rsp.version);
3259                 if (be16_to_cpu(crq->version_exchange_rsp.version) <
3260                     ibmvnic_version)
3261                         ibmvnic_version =
3262                             be16_to_cpu(crq->version_exchange_rsp.version);
3263                 send_cap_queries(adapter);
3264                 break;
3265         case QUERY_CAPABILITY_RSP:
3266                 handle_query_cap_rsp(crq, adapter);
3267                 break;
3268         case QUERY_MAP_RSP:
3269                 handle_query_map_rsp(crq, adapter);
3270                 break;
3271         case REQUEST_MAP_RSP:
3272                 handle_request_map_rsp(crq, adapter);
3273                 break;
3274         case REQUEST_UNMAP_RSP:
3275                 handle_request_unmap_rsp(crq, adapter);
3276                 break;
3277         case REQUEST_CAPABILITY_RSP:
3278                 handle_request_cap_rsp(crq, adapter);
3279                 break;
3280         case LOGIN_RSP:
3281                 netdev_dbg(netdev, "Got Login Response\n");
3282                 handle_login_rsp(crq, adapter);
3283                 break;
3284         case LOGICAL_LINK_STATE_RSP:
3285                 netdev_dbg(netdev, "Got Logical Link State Response\n");
3286                 adapter->logical_link_state =
3287                     crq->logical_link_state_rsp.link_state;
3288                 break;
3289         case LINK_STATE_INDICATION:
3290                 netdev_dbg(netdev, "Got Logical Link State Indication\n");
3291                 adapter->phys_link_state =
3292                     crq->link_state_indication.phys_link_state;
3293                 adapter->logical_link_state =
3294                     crq->link_state_indication.logical_link_state;
3295                 break;
3296         case CHANGE_MAC_ADDR_RSP:
3297                 netdev_dbg(netdev, "Got MAC address change Response\n");
3298                 handle_change_mac_rsp(crq, adapter);
3299                 break;
3300         case ERROR_INDICATION:
3301                 netdev_dbg(netdev, "Got Error Indication\n");
3302                 handle_error_indication(crq, adapter);
3303                 break;
3304         case REQUEST_ERROR_RSP:
3305                 netdev_dbg(netdev, "Got Error Detail Response\n");
3306                 handle_error_info_rsp(crq, adapter);
3307                 break;
3308         case REQUEST_STATISTICS_RSP:
3309                 netdev_dbg(netdev, "Got Statistics Response\n");
3310                 complete(&adapter->stats_done);
3311                 break;
3312         case REQUEST_DUMP_SIZE_RSP:
3313                 netdev_dbg(netdev, "Got Request Dump Size Response\n");
3314                 handle_dump_size_rsp(crq, adapter);
3315                 break;
3316         case REQUEST_DUMP_RSP:
3317                 netdev_dbg(netdev, "Got Request Dump Response\n");
3318                 complete(&adapter->fw_done);
3319                 break;
3320         case QUERY_IP_OFFLOAD_RSP:
3321                 netdev_dbg(netdev, "Got Query IP offload Response\n");
3322                 handle_query_ip_offload_rsp(adapter);
3323                 break;
3324         case MULTICAST_CTRL_RSP:
3325                 netdev_dbg(netdev, "Got multicast control Response\n");
3326                 break;
3327         case CONTROL_IP_OFFLOAD_RSP:
3328                 netdev_dbg(netdev, "Got Control IP offload Response\n");
3329                 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
3330                                  sizeof(adapter->ip_offload_ctrl),
3331                                  DMA_TO_DEVICE);
3332                 /* We're done with the queries, perform the login */
3333                 send_login(adapter);
3334                 break;
3335         case REQUEST_RAS_COMP_NUM_RSP:
3336                 netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
3337                 if (crq->request_ras_comp_num_rsp.rc.code == 10) {
3338                         netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
3339                         break;
3340                 }
3341                 adapter->ras_comp_num =
3342                     be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
3343                 handle_request_ras_comp_num_rsp(crq, adapter);
3344                 break;
3345         case REQUEST_RAS_COMPS_RSP:
3346                 netdev_dbg(netdev, "Got Request RAS Comps Response\n");
3347                 handle_request_ras_comps_rsp(crq, adapter);
3348                 break;
3349         case CONTROL_RAS_RSP:
3350                 netdev_dbg(netdev, "Got Control RAS Response\n");
3351                 handle_control_ras_rsp(crq, adapter);
3352                 break;
3353         case COLLECT_FW_TRACE_RSP:
3354                 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
3355                 complete(&adapter->fw_done);
3356                 break;
3357         default:
3358                 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
3359                            gen_crq->cmd);
3360         }
3361 }
3362
3363 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
3364 {
3365         struct ibmvnic_adapter *adapter = instance;
3366         struct ibmvnic_crq_queue *queue = &adapter->crq;
3367         struct vio_dev *vdev = adapter->vdev;
3368         union ibmvnic_crq *crq;
3369         unsigned long flags;
3370         bool done = false;
3371
3372         spin_lock_irqsave(&queue->lock, flags);
3373         vio_disable_interrupts(vdev);
3374         while (!done) {
3375                 /* Pull all the valid messages off the CRQ */
3376                 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
3377                         ibmvnic_handle_crq(crq, adapter);
3378                         crq->generic.first = 0;
3379                 }
3380                 vio_enable_interrupts(vdev);
3381                 crq = ibmvnic_next_crq(adapter);
3382                 if (crq) {
3383                         vio_disable_interrupts(vdev);
3384                         ibmvnic_handle_crq(crq, adapter);
3385                         crq->generic.first = 0;
3386                 } else {
3387                         done = true;
3388                 }
3389         }
3390         spin_unlock_irqrestore(&queue->lock, flags);
3391         return IRQ_HANDLED;
3392 }
3393
3394 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
3395 {
3396         struct vio_dev *vdev = adapter->vdev;
3397         int rc;
3398
3399         do {
3400                 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
3401         } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
3402
3403         if (rc)
3404                 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
3405
3406         return rc;
3407 }
3408
3409 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
3410 {
3411         struct ibmvnic_crq_queue *crq = &adapter->crq;
3412         struct device *dev = &adapter->vdev->dev;
3413         struct vio_dev *vdev = adapter->vdev;
3414         int rc;
3415
3416         /* Close the CRQ */
3417         do {
3418                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3419         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3420
3421         /* Clean out the queue */
3422         memset(crq->msgs, 0, PAGE_SIZE);
3423         crq->cur = 0;
3424
3425         /* And re-open it again */
3426         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3427                                 crq->msg_token, PAGE_SIZE);
3428
3429         if (rc == H_CLOSED)
3430                 /* Adapter is good, but other end is not ready */
3431                 dev_warn(dev, "Partner adapter not ready\n");
3432         else if (rc != 0)
3433                 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
3434
3435         return rc;
3436 }
3437
3438 static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
3439 {
3440         struct ibmvnic_crq_queue *crq = &adapter->crq;
3441         struct vio_dev *vdev = adapter->vdev;
3442         long rc;
3443
3444         netdev_dbg(adapter->netdev, "Releasing CRQ\n");
3445         free_irq(vdev->irq, adapter);
3446         do {
3447                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3448         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3449
3450         dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
3451                          DMA_BIDIRECTIONAL);
3452         free_page((unsigned long)crq->msgs);
3453 }
3454
3455 static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
3456 {
3457         struct ibmvnic_crq_queue *crq = &adapter->crq;
3458         struct device *dev = &adapter->vdev->dev;
3459         struct vio_dev *vdev = adapter->vdev;
3460         int rc, retrc = -ENOMEM;
3461
3462         crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
3463         /* Should we allocate more than one page? */
3464
3465         if (!crq->msgs)
3466                 return -ENOMEM;
3467
3468         crq->size = PAGE_SIZE / sizeof(*crq->msgs);
3469         crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
3470                                         DMA_BIDIRECTIONAL);
3471         if (dma_mapping_error(dev, crq->msg_token))
3472                 goto map_failed;
3473
3474         rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
3475                                 crq->msg_token, PAGE_SIZE);
3476
3477         if (rc == H_RESOURCE)
3478                 /* maybe kexecing and resource is busy. try a reset */
3479                 rc = ibmvnic_reset_crq(adapter);
3480         retrc = rc;
3481
3482         if (rc == H_CLOSED) {
3483                 dev_warn(dev, "Partner adapter not ready\n");
3484         } else if (rc) {
3485                 dev_warn(dev, "Error %d opening adapter\n", rc);
3486                 goto reg_crq_failed;
3487         }
3488
3489         retrc = 0;
3490
3491         netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
3492         rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
3493                          adapter);
3494         if (rc) {
3495                 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
3496                         vdev->irq, rc);
3497                 goto req_irq_failed;
3498         }
3499
3500         rc = vio_enable_interrupts(vdev);
3501         if (rc) {
3502                 dev_err(dev, "Error %d enabling interrupts\n", rc);
3503                 goto req_irq_failed;
3504         }
3505
3506         crq->cur = 0;
3507         spin_lock_init(&crq->lock);
3508
3509         return retrc;
3510
3511 req_irq_failed:
3512         do {
3513                 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
3514         } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
3515 reg_crq_failed:
3516         dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
3517 map_failed:
3518         free_page((unsigned long)crq->msgs);
3519         return retrc;
3520 }
3521
3522 /* debugfs for dump */
3523 static int ibmvnic_dump_show(struct seq_file *seq, void *v)
3524 {
3525         struct net_device *netdev = seq->private;
3526         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3527         struct device *dev = &adapter->vdev->dev;
3528         union ibmvnic_crq crq;
3529
3530         memset(&crq, 0, sizeof(crq));
3531         crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
3532         crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
3533         ibmvnic_send_crq(adapter, &crq);
3534
3535         init_completion(&adapter->fw_done);
3536         wait_for_completion(&adapter->fw_done);
3537
3538         seq_write(seq, adapter->dump_data, adapter->dump_data_size);
3539
3540         dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
3541                          DMA_BIDIRECTIONAL);
3542
3543         kfree(adapter->dump_data);
3544
3545         return 0;
3546 }
3547
3548 static int ibmvnic_dump_open(struct inode *inode, struct file *file)
3549 {
3550         return single_open(file, ibmvnic_dump_show, inode->i_private);
3551 }
3552
3553 static const struct file_operations ibmvnic_dump_ops = {
3554         .owner          = THIS_MODULE,
3555         .open           = ibmvnic_dump_open,
3556         .read           = seq_read,
3557         .llseek         = seq_lseek,
3558         .release        = single_release,
3559 };
3560
3561 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
3562 {
3563         struct ibmvnic_adapter *adapter;
3564         struct net_device *netdev;
3565         unsigned char *mac_addr_p;
3566         struct dentry *ent;
3567         char buf[16]; /* debugfs name buf */
3568         int rc;
3569
3570         dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
3571                 dev->unit_address);
3572
3573         mac_addr_p = (unsigned char *)vio_get_attribute(dev,
3574                                                         VETH_MAC_ADDR, NULL);
3575         if (!mac_addr_p) {
3576                 dev_err(&dev->dev,
3577                         "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
3578                         __FILE__, __LINE__);
3579                 return 0;
3580         }
3581
3582         netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
3583                                    IBMVNIC_MAX_TX_QUEUES);
3584         if (!netdev)
3585                 return -ENOMEM;
3586
3587         adapter = netdev_priv(netdev);
3588         dev_set_drvdata(&dev->dev, netdev);
3589         adapter->vdev = dev;
3590         adapter->netdev = netdev;
3591
3592         ether_addr_copy(adapter->mac_addr, mac_addr_p);
3593         ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3594         netdev->irq = dev->irq;
3595         netdev->netdev_ops = &ibmvnic_netdev_ops;
3596         netdev->ethtool_ops = &ibmvnic_ethtool_ops;
3597         SET_NETDEV_DEV(netdev, &dev->dev);
3598
3599         spin_lock_init(&adapter->stats_lock);
3600
3601         rc = ibmvnic_init_crq_queue(adapter);
3602         if (rc) {
3603                 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
3604                 goto free_netdev;
3605         }
3606
3607         INIT_LIST_HEAD(&adapter->errors);
3608         INIT_LIST_HEAD(&adapter->inflight);
3609         spin_lock_init(&adapter->error_list_lock);
3610         spin_lock_init(&adapter->inflight_lock);
3611
3612         adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
3613                                               sizeof(struct ibmvnic_statistics),
3614                                               DMA_FROM_DEVICE);
3615         if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
3616                 if (!firmware_has_feature(FW_FEATURE_CMO))
3617                         dev_err(&dev->dev, "Couldn't map stats buffer\n");
3618                 goto free_crq;
3619         }
3620
3621         snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
3622         ent = debugfs_create_dir(buf, NULL);
3623         if (!ent || IS_ERR(ent)) {
3624                 dev_info(&dev->dev, "debugfs create directory failed\n");
3625                 adapter->debugfs_dir = NULL;
3626         } else {
3627                 adapter->debugfs_dir = ent;
3628                 ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
3629                                           netdev, &ibmvnic_dump_ops);
3630                 if (!ent || IS_ERR(ent)) {
3631                         dev_info(&dev->dev,
3632                                  "debugfs create dump file failed\n");
3633                         adapter->debugfs_dump = NULL;
3634                 } else {
3635                         adapter->debugfs_dump = ent;
3636                 }
3637         }
3638         ibmvnic_send_crq_init(adapter);
3639
3640         init_completion(&adapter->init_done);
3641         wait_for_completion(&adapter->init_done);
3642
3643         do {
3644                 adapter->renegotiate = false;
3645
3646                 init_sub_crqs(adapter, 0);
3647                 reinit_completion(&adapter->init_done);
3648                 wait_for_completion(&adapter->init_done);
3649
3650                 if (adapter->renegotiate) {
3651                         release_sub_crqs(adapter);
3652                         send_cap_queries(adapter);
3653
3654                         reinit_completion(&adapter->init_done);
3655                         wait_for_completion(&adapter->init_done);
3656                 }
3657         } while (adapter->renegotiate);
3658
3659         /* if init_sub_crqs is partially successful, retry */
3660         while (!adapter->tx_scrq || !adapter->rx_scrq) {
3661                 init_sub_crqs(adapter, 1);
3662
3663                 reinit_completion(&adapter->init_done);
3664                 wait_for_completion(&adapter->init_done);
3665         }
3666
3667         netdev->real_num_tx_queues = adapter->req_tx_queues;
3668
3669         rc = register_netdev(netdev);
3670         if (rc) {
3671                 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
3672                 goto free_debugfs;
3673         }
3674         dev_info(&dev->dev, "ibmvnic registered\n");
3675
3676         return 0;
3677
3678 free_debugfs:
3679         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3680                 debugfs_remove_recursive(adapter->debugfs_dir);
3681 free_crq:
3682         ibmvnic_release_crq_queue(adapter);
3683 free_netdev:
3684         free_netdev(netdev);
3685         return rc;
3686 }
3687
3688 static int ibmvnic_remove(struct vio_dev *dev)
3689 {
3690         struct net_device *netdev = dev_get_drvdata(&dev->dev);
3691         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3692
3693         unregister_netdev(netdev);
3694
3695         release_sub_crqs(adapter);
3696
3697         ibmvnic_release_crq_queue(adapter);
3698
3699         if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
3700                 debugfs_remove_recursive(adapter->debugfs_dir);
3701
3702         if (adapter->ras_comps)
3703                 dma_free_coherent(&dev->dev,
3704                                   adapter->ras_comp_num *
3705                                   sizeof(struct ibmvnic_fw_component),
3706                                   adapter->ras_comps, adapter->ras_comps_tok);
3707
3708         kfree(adapter->ras_comp_int);
3709
3710         free_netdev(netdev);
3711         dev_set_drvdata(&dev->dev, NULL);
3712
3713         return 0;
3714 }
3715
3716 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
3717 {
3718         struct net_device *netdev = dev_get_drvdata(&vdev->dev);
3719         struct ibmvnic_adapter *adapter;
3720         struct iommu_table *tbl;
3721         unsigned long ret = 0;
3722         int i;
3723
3724         tbl = get_iommu_table_base(&vdev->dev);
3725
3726         /* netdev inits at probe time along with the structures we need below*/
3727         if (!netdev)
3728                 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
3729
3730         adapter = netdev_priv(netdev);
3731
3732         ret += PAGE_SIZE; /* the crq message queue */
3733         ret += adapter->bounce_buffer_size;
3734         ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
3735
3736         for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
3737                 ret += 4 * PAGE_SIZE; /* the scrq message queue */
3738
3739         for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
3740              i++)
3741                 ret += adapter->rx_pool[i].size *
3742                     IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
3743
3744         return ret;
3745 }
3746
3747 static int ibmvnic_resume(struct device *dev)
3748 {
3749         struct net_device *netdev = dev_get_drvdata(dev);
3750         struct ibmvnic_adapter *adapter = netdev_priv(netdev);
3751         int i;
3752
3753         /* kick the interrupt handlers just in case we lost an interrupt */
3754         for (i = 0; i < adapter->req_rx_queues; i++)
3755                 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
3756                                      adapter->rx_scrq[i]);
3757
3758         return 0;
3759 }
3760
3761 static struct vio_device_id ibmvnic_device_table[] = {
3762         {"network", "IBM,vnic"},
3763         {"", "" }
3764 };
3765 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
3766
3767 static const struct dev_pm_ops ibmvnic_pm_ops = {
3768         .resume = ibmvnic_resume
3769 };
3770
3771 static struct vio_driver ibmvnic_driver = {
3772         .id_table       = ibmvnic_device_table,
3773         .probe          = ibmvnic_probe,
3774         .remove         = ibmvnic_remove,
3775         .get_desired_dma = ibmvnic_get_desired_dma,
3776         .name           = ibmvnic_driver_name,
3777         .pm             = &ibmvnic_pm_ops,
3778 };
3779
3780 /* module functions */
3781 static int __init ibmvnic_module_init(void)
3782 {
3783         pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
3784                 IBMVNIC_DRIVER_VERSION);
3785
3786         return vio_register_driver(&ibmvnic_driver);
3787 }
3788
3789 static void __exit ibmvnic_module_exit(void)
3790 {
3791         vio_unregister_driver(&ibmvnic_driver);
3792 }
3793
3794 module_init(ibmvnic_module_init);
3795 module_exit(ibmvnic_module_exit);