drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c

   1 /*
   2  * Copyright (c) 2012-2016 VMware, Inc.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of EITHER the GNU General Public License
   6  * version 2 as published by the Free Software Foundation or the BSD
   7  * 2-Clause License. This program is distributed in the hope that it
   8  * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
   9  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  10  * See the GNU General Public License version 2 for more details at
  11  * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program available in the file COPYING in the main
  15  * directory of this source tree.
  16  *
  17  * The BSD 2-Clause License
  18  *
  19  *     Redistribution and use in source and binary forms, with or
  20  *     without modification, are permitted provided that the following
  21  *     conditions are met:
  22  *
  23  *      - Redistributions of source code must retain the above
  24  *        copyright notice, this list of conditions and the following
  25  *        disclaimer.
  26  *
  27  *      - Redistributions in binary form must reproduce the above
  28  *        copyright notice, this list of conditions and the following
  29  *        disclaimer in the documentation and/or other materials
  30  *        provided with the distribution.
  31  *
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  35  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  36  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  37  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  38  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  39  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  41  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  42  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  43  * OF THE POSSIBILITY OF SUCH DAMAGE.
  44  */
  45
  46 #include <linux/errno.h>
  47 #include <linux/inetdevice.h>
  48 #include <linux/init.h>
  49 #include <linux/module.h>
  50 #include <linux/slab.h>
  51 #include <rdma/ib_addr.h>
  52 #include <rdma/ib_smi.h>
  53 #include <rdma/ib_user_verbs.h>
  54 #include <net/addrconf.h>
  55
  56 #include "pvrdma.h"
  57
  58 #define DRV_NAME        "vmw_pvrdma"
  59 #define DRV_VERSION     "1.0.1.0-k"
  60
  61 static DEFINE_MUTEX(pvrdma_device_list_lock);
  62 static LIST_HEAD(pvrdma_device_list);
  63 static struct workqueue_struct *event_wq;
  64
  65 static int pvrdma_add_gid(struct ib_device *ibdev,
  66                           u8 port_num,
  67                           unsigned int index,
  68                           const union ib_gid *gid,
  69                           const struct ib_gid_attr *attr,
  70                           void **context);
  71 static int pvrdma_del_gid(struct ib_device *ibdev,
  72                           u8 port_num,
  73                           unsigned int index,
  74                           void **context);
  75
  76
  77 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
  78                         char *buf)
  79 {
  80         return sprintf(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
  81 }
  82
  83 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
  84                         char *buf)
  85 {
  86         return sprintf(buf, "%d\n", PVRDMA_REV_ID);
  87 }
  88
  89 static ssize_t show_board(struct device *device, struct device_attribute *attr,
  90                           char *buf)
  91 {
  92         return sprintf(buf, "%d\n", PVRDMA_BOARD_ID);
  93 }
  94
  95 static DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
  96 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
  97 static DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
  98
  99 static struct device_attribute *pvrdma_class_attributes[] = {
 100         &dev_attr_hw_rev,
 101         &dev_attr_hca_type,
 102         &dev_attr_board_id
 103 };
 104
 105 static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str,
 106                                   size_t str_len)
 107 {
 108         struct pvrdma_dev *dev =
 109                 container_of(device, struct pvrdma_dev, ib_dev);
 110         snprintf(str, str_len, "%d.%d.%d\n",
 111                  (int) (dev->dsr->caps.fw_ver >> 32),
 112                  (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
 113                  (int) dev->dsr->caps.fw_ver & 0xffff);
 114 }
 115
 116 static int pvrdma_init_device(struct pvrdma_dev *dev)
 117 {
 118         /*  Initialize some device related stuff */
 119         spin_lock_init(&dev->cmd_lock);
 120         sema_init(&dev->cmd_sema, 1);
 121         atomic_set(&dev->num_qps, 0);
 122         atomic_set(&dev->num_cqs, 0);
 123         atomic_set(&dev->num_pds, 0);
 124         atomic_set(&dev->num_ahs, 0);
 125
 126         return 0;
 127 }
 128
 129 static int pvrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
 130                                  struct ib_port_immutable *immutable)
 131 {
 132         struct ib_port_attr attr;
 133         int err;
 134
 135         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
 136
 137         err = ib_query_port(ibdev, port_num, &attr);
 138         if (err)
 139                 return err;
 140
 141         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 142         immutable->gid_tbl_len = attr.gid_tbl_len;
 143         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 144         return 0;
 145 }
 146
 147 static struct net_device *pvrdma_get_netdev(struct ib_device *ibdev,
 148                                             u8 port_num)
 149 {
 150         struct net_device *netdev;
 151         struct pvrdma_dev *dev = to_vdev(ibdev);
 152
 153         if (port_num != 1)
 154                 return NULL;
 155
 156         rcu_read_lock();
 157         netdev = dev->netdev;
 158         if (netdev)
 159                 dev_hold(netdev);
 160         rcu_read_unlock();
 161
 162         return netdev;
 163 }
 164
 165 static int pvrdma_register_device(struct pvrdma_dev *dev)
 166 {
 167         int ret = -1;
 168         int i = 0;
 169
 170         strlcpy(dev->ib_dev.name, "vmw_pvrdma%d", IB_DEVICE_NAME_MAX);
 171         dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
 172         dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
 173         dev->flags = 0;
 174         dev->ib_dev.owner = THIS_MODULE;
 175         dev->ib_dev.num_comp_vectors = 1;
 176         dev->ib_dev.dev.parent = &dev->pdev->dev;
 177         dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION;
 178         dev->ib_dev.uverbs_cmd_mask =
 179                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 180                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 181                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 182                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 183                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 184                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 185                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 186                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 187                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 188                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 189                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 190                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 191                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 192                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 193                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 194                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 195                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 196                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 197                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 198                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 199
 200         dev->ib_dev.node_type = RDMA_NODE_IB_CA;
 201         dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
 202
 203         dev->ib_dev.query_device = pvrdma_query_device;
 204         dev->ib_dev.query_port = pvrdma_query_port;
 205         dev->ib_dev.query_gid = pvrdma_query_gid;
 206         dev->ib_dev.query_pkey = pvrdma_query_pkey;
 207         dev->ib_dev.modify_port = pvrdma_modify_port;
 208         dev->ib_dev.alloc_ucontext = pvrdma_alloc_ucontext;
 209         dev->ib_dev.dealloc_ucontext = pvrdma_dealloc_ucontext;
 210         dev->ib_dev.mmap = pvrdma_mmap;
 211         dev->ib_dev.alloc_pd = pvrdma_alloc_pd;
 212         dev->ib_dev.dealloc_pd = pvrdma_dealloc_pd;
 213         dev->ib_dev.create_ah = pvrdma_create_ah;
 214         dev->ib_dev.destroy_ah = pvrdma_destroy_ah;
 215         dev->ib_dev.create_qp = pvrdma_create_qp;
 216         dev->ib_dev.modify_qp = pvrdma_modify_qp;
 217         dev->ib_dev.query_qp = pvrdma_query_qp;
 218         dev->ib_dev.destroy_qp = pvrdma_destroy_qp;
 219         dev->ib_dev.post_send = pvrdma_post_send;
 220         dev->ib_dev.post_recv = pvrdma_post_recv;
 221         dev->ib_dev.create_cq = pvrdma_create_cq;
 222         dev->ib_dev.modify_cq = pvrdma_modify_cq;
 223         dev->ib_dev.resize_cq = pvrdma_resize_cq;
 224         dev->ib_dev.destroy_cq = pvrdma_destroy_cq;
 225         dev->ib_dev.poll_cq = pvrdma_poll_cq;
 226         dev->ib_dev.req_notify_cq = pvrdma_req_notify_cq;
 227         dev->ib_dev.get_dma_mr = pvrdma_get_dma_mr;
 228         dev->ib_dev.reg_user_mr = pvrdma_reg_user_mr;
 229         dev->ib_dev.dereg_mr = pvrdma_dereg_mr;
 230         dev->ib_dev.alloc_mr = pvrdma_alloc_mr;
 231         dev->ib_dev.map_mr_sg = pvrdma_map_mr_sg;
 232         dev->ib_dev.add_gid = pvrdma_add_gid;
 233         dev->ib_dev.del_gid = pvrdma_del_gid;
 234         dev->ib_dev.get_netdev = pvrdma_get_netdev;
 235         dev->ib_dev.get_port_immutable = pvrdma_port_immutable;
 236         dev->ib_dev.get_link_layer = pvrdma_port_link_layer;
 237         dev->ib_dev.get_dev_fw_str = pvrdma_get_fw_ver_str;
 238
 239         mutex_init(&dev->port_mutex);
 240         spin_lock_init(&dev->desc_lock);
 241
 242         dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(void *),
 243                               GFP_KERNEL);
 244         if (!dev->cq_tbl)
 245                 return ret;
 246         spin_lock_init(&dev->cq_tbl_lock);
 247
 248         dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(void *),
 249                               GFP_KERNEL);
 250         if (!dev->qp_tbl)
 251                 goto err_cq_free;
 252         spin_lock_init(&dev->qp_tbl_lock);
 253
 254         ret = ib_register_device(&dev->ib_dev, NULL);
 255         if (ret)
 256                 goto err_qp_free;
 257
 258         for (i = 0; i < ARRAY_SIZE(pvrdma_class_attributes); ++i) {
 259                 ret = device_create_file(&dev->ib_dev.dev,
 260                                          pvrdma_class_attributes[i]);
 261                 if (ret)
 262                         goto err_class;
 263         }
 264
 265         dev->ib_active = true;
 266
 267         return 0;
 268
 269 err_class:
 270         ib_unregister_device(&dev->ib_dev);
 271 err_qp_free:
 272         kfree(dev->qp_tbl);
 273 err_cq_free:
 274         kfree(dev->cq_tbl);
 275
 276         return ret;
 277 }
 278
 279 static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
 280 {
 281         u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
 282         struct pvrdma_dev *dev = dev_id;
 283
 284         dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
 285
 286         if (!dev->pdev->msix_enabled) {
 287                 /* Legacy intr */
 288                 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
 289                 if (icr == 0)
 290                         return IRQ_NONE;
 291         }
 292
 293         if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
 294                 complete(&dev->cmd_done);
 295
 296         return IRQ_HANDLED;
 297 }
 298
 299 static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
 300 {
 301         struct pvrdma_qp *qp;
 302         unsigned long flags;
 303
 304         spin_lock_irqsave(&dev->qp_tbl_lock, flags);
 305         qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
 306         if (qp)
 307                 atomic_inc(&qp->refcnt);
 308         spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
 309
 310         if (qp && qp->ibqp.event_handler) {
 311                 struct ib_qp *ibqp = &qp->ibqp;
 312                 struct ib_event e;
 313
 314                 e.device = ibqp->device;
 315                 e.element.qp = ibqp;
 316                 e.event = type; /* 1:1 mapping for now. */
 317                 ibqp->event_handler(&e, ibqp->qp_context);
 318         }
 319         if (qp) {
 320                 atomic_dec(&qp->refcnt);
 321                 if (atomic_read(&qp->refcnt) == 0)
 322                         wake_up(&qp->wait);
 323         }
 324 }
 325
 326 static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
 327 {
 328         struct pvrdma_cq *cq;
 329         unsigned long flags;
 330
 331         spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 332         cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
 333         if (cq)
 334                 atomic_inc(&cq->refcnt);
 335         spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 336
 337         if (cq && cq->ibcq.event_handler) {
 338                 struct ib_cq *ibcq = &cq->ibcq;
 339                 struct ib_event e;
 340
 341                 e.device = ibcq->device;
 342                 e.element.cq = ibcq;
 343                 e.event = type; /* 1:1 mapping for now. */
 344                 ibcq->event_handler(&e, ibcq->cq_context);
 345         }
 346         if (cq) {
 347                 atomic_dec(&cq->refcnt);
 348                 if (atomic_read(&cq->refcnt) == 0)
 349                         wake_up(&cq->wait);
 350         }
 351 }
 352
 353 static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
 354                                   enum ib_event_type event)
 355 {
 356         struct ib_event ib_event;
 357
 358         memset(&ib_event, 0, sizeof(ib_event));
 359         ib_event.device = &dev->ib_dev;
 360         ib_event.element.port_num = port;
 361         ib_event.event = event;
 362         ib_dispatch_event(&ib_event);
 363 }
 364
 365 static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
 366 {
 367         if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
 368                 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
 369                 return;
 370         }
 371
 372         pvrdma_dispatch_event(dev, port, type);
 373 }
 374
 375 static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
 376 {
 377         return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
 378                                         &dev->async_pdir,
 379                                         PAGE_SIZE +
 380                                         sizeof(struct pvrdma_eqe) * i);
 381 }
 382
 383 static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
 384 {
 385         struct pvrdma_dev *dev = dev_id;
 386         struct pvrdma_ring *ring = &dev->async_ring_state->rx;
 387         int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
 388                          PAGE_SIZE / sizeof(struct pvrdma_eqe);
 389         unsigned int head;
 390
 391         dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
 392
 393         /*
 394          * Don't process events until the IB device is registered. Otherwise
 395          * we'll try to ib_dispatch_event() on an invalid device.
 396          */
 397         if (!dev->ib_active)
 398                 return IRQ_HANDLED;
 399
 400         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 401                 struct pvrdma_eqe *eqe;
 402
 403                 eqe = get_eqe(dev, head);
 404
 405                 switch (eqe->type) {
 406                 case PVRDMA_EVENT_QP_FATAL:
 407                 case PVRDMA_EVENT_QP_REQ_ERR:
 408                 case PVRDMA_EVENT_QP_ACCESS_ERR:
 409                 case PVRDMA_EVENT_COMM_EST:
 410                 case PVRDMA_EVENT_SQ_DRAINED:
 411                 case PVRDMA_EVENT_PATH_MIG:
 412                 case PVRDMA_EVENT_PATH_MIG_ERR:
 413                 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
 414                         pvrdma_qp_event(dev, eqe->info, eqe->type);
 415                         break;
 416
 417                 case PVRDMA_EVENT_CQ_ERR:
 418                         pvrdma_cq_event(dev, eqe->info, eqe->type);
 419                         break;
 420
 421                 case PVRDMA_EVENT_SRQ_ERR:
 422                 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
 423                         break;
 424
 425                 case PVRDMA_EVENT_PORT_ACTIVE:
 426                 case PVRDMA_EVENT_PORT_ERR:
 427                 case PVRDMA_EVENT_LID_CHANGE:
 428                 case PVRDMA_EVENT_PKEY_CHANGE:
 429                 case PVRDMA_EVENT_SM_CHANGE:
 430                 case PVRDMA_EVENT_CLIENT_REREGISTER:
 431                 case PVRDMA_EVENT_GID_CHANGE:
 432                         pvrdma_dev_event(dev, eqe->info, eqe->type);
 433                         break;
 434
 435                 case PVRDMA_EVENT_DEVICE_FATAL:
 436                         pvrdma_dev_event(dev, 1, eqe->type);
 437                         break;
 438
 439                 default:
 440                         break;
 441                 }
 442
 443                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 444         }
 445
 446         return IRQ_HANDLED;
 447 }
 448
 449 static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
 450                                            unsigned int i)
 451 {
 452         return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
 453                                         &dev->cq_pdir,
 454                                         PAGE_SIZE +
 455                                         sizeof(struct pvrdma_cqne) * i);
 456 }
 457
 458 static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
 459 {
 460         struct pvrdma_dev *dev = dev_id;
 461         struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
 462         int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
 463                          sizeof(struct pvrdma_cqne);
 464         unsigned int head;
 465         unsigned long flags;
 466
 467         dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
 468
 469         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 470                 struct pvrdma_cqne *cqne;
 471                 struct pvrdma_cq *cq;
 472
 473                 cqne = get_cqne(dev, head);
 474                 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 475                 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
 476                 if (cq)
 477                         atomic_inc(&cq->refcnt);
 478                 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 479
 480                 if (cq && cq->ibcq.comp_handler)
 481                         cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
 482                 if (cq) {
 483                         atomic_dec(&cq->refcnt);
 484                         if (atomic_read(&cq->refcnt))
 485                                 wake_up(&cq->wait);
 486                 }
 487                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 488         }
 489
 490         return IRQ_HANDLED;
 491 }
 492
 493 static void pvrdma_free_irq(struct pvrdma_dev *dev)
 494 {
 495         int i;
 496
 497         dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
 498         for (i = 0; i < dev->nr_vectors; i++)
 499                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 500 }
 501
 502 static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
 503 {
 504         dev_dbg(&dev->pdev->dev, "enable interrupts\n");
 505         pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
 506 }
 507
 508 static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
 509 {
 510         dev_dbg(&dev->pdev->dev, "disable interrupts\n");
 511         pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
 512 }
 513
 514 static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
 515 {
 516         struct pci_dev *pdev = dev->pdev;
 517         int ret = 0, i;
 518
 519         ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
 520                         PCI_IRQ_MSIX);
 521         if (ret < 0) {
 522                 ret = pci_alloc_irq_vectors(pdev, 1, 1,
 523                                 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
 524                 if (ret < 0)
 525                         return ret;
 526         }
 527         dev->nr_vectors = ret;
 528
 529         ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
 530                         pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
 531         if (ret) {
 532                 dev_err(&dev->pdev->dev,
 533                         "failed to request interrupt 0\n");
 534                 goto out_free_vectors;
 535         }
 536
 537         for (i = 1; i < dev->nr_vectors; i++) {
 538                 ret = request_irq(pci_irq_vector(dev->pdev, i),
 539                                 i == 1 ? pvrdma_intr1_handler :
 540                                          pvrdma_intrx_handler,
 541                                 0, DRV_NAME, dev);
 542                 if (ret) {
 543                         dev_err(&dev->pdev->dev,
 544                                 "failed to request interrupt %d\n", i);
 545                         goto free_irqs;
 546                 }
 547         }
 548
 549         return 0;
 550
 551 free_irqs:
 552         while (--i >= 0)
 553                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 554 out_free_vectors:
 555         pci_free_irq_vectors(pdev);
 556         return ret;
 557 }
 558
 559 static void pvrdma_free_slots(struct pvrdma_dev *dev)
 560 {
 561         struct pci_dev *pdev = dev->pdev;
 562
 563         if (dev->resp_slot)
 564                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
 565                                   dev->dsr->resp_slot_dma);
 566         if (dev->cmd_slot)
 567                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
 568                                   dev->dsr->cmd_slot_dma);
 569 }
 570
 571 static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
 572                                    const union ib_gid *gid,
 573                                    int index)
 574 {
 575         int ret;
 576         union pvrdma_cmd_req req;
 577         struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
 578
 579         if (!dev->sgid_tbl) {
 580                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 581                 return -EINVAL;
 582         }
 583
 584         memset(cmd_bind, 0, sizeof(*cmd_bind));
 585         cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
 586         memcpy(cmd_bind->new_gid, gid->raw, 16);
 587         cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
 588         cmd_bind->vlan = 0xfff;
 589         cmd_bind->index = index;
 590         cmd_bind->gid_type = PVRDMA_GID_TYPE_FLAG_ROCE_V1;
 591
 592         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 593         if (ret < 0) {
 594                 dev_warn(&dev->pdev->dev,
 595                          "could not create binding, error: %d\n", ret);
 596                 return -EFAULT;
 597         }
 598         memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
 599         return 0;
 600 }
 601
 602 static int pvrdma_add_gid(struct ib_device *ibdev,
 603                           u8 port_num,
 604                           unsigned int index,
 605                           const union ib_gid *gid,
 606                           const struct ib_gid_attr *attr,
 607                           void **context)
 608 {
 609         struct pvrdma_dev *dev = to_vdev(ibdev);
 610
 611         return pvrdma_add_gid_at_index(dev, gid, index);
 612 }
 613
 614 static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
 615 {
 616         int ret;
 617         union pvrdma_cmd_req req;
 618         struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
 619
 620         /* Update sgid table. */
 621         if (!dev->sgid_tbl) {
 622                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 623                 return -EINVAL;
 624         }
 625
 626         memset(cmd_dest, 0, sizeof(*cmd_dest));
 627         cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
 628         memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
 629         cmd_dest->index = index;
 630
 631         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 632         if (ret < 0) {
 633                 dev_warn(&dev->pdev->dev,
 634                          "could not destroy binding, error: %d\n", ret);
 635                 return ret;
 636         }
 637         memset(&dev->sgid_tbl[index], 0, 16);
 638         return 0;
 639 }
 640
 641 static int pvrdma_del_gid(struct ib_device *ibdev,
 642                           u8 port_num,
 643                           unsigned int index,
 644                           void **context)
 645 {
 646         struct pvrdma_dev *dev = to_vdev(ibdev);
 647
 648         dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
 649                 index, dev->netdev->name);
 650
 651         return pvrdma_del_gid_at_index(dev, index);
 652 }
 653
 654 static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 655                                           unsigned long event)
 656 {
 657         switch (event) {
 658         case NETDEV_REBOOT:
 659         case NETDEV_DOWN:
 660                 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 661                 break;
 662         case NETDEV_UP:
 663                 pvrdma_write_reg(dev, PVRDMA_REG_CTL,
 664                                  PVRDMA_DEVICE_CTL_UNQUIESCE);
 665
 666                 mb();
 667
 668                 if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
 669                         dev_err(&dev->pdev->dev,
 670                                 "failed to activate device during link up\n");
 671                 else
 672                         pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 673                 break;
 674         default:
 675                 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
 676                         event, dev->ib_dev.name);
 677                 break;
 678         }
 679 }
 680
 681 static void pvrdma_netdevice_event_work(struct work_struct *work)
 682 {
 683         struct pvrdma_netdevice_work *netdev_work;
 684         struct pvrdma_dev *dev;
 685
 686         netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
 687
 688         mutex_lock(&pvrdma_device_list_lock);
 689         list_for_each_entry(dev, &pvrdma_device_list, device_link) {
 690                 if (dev->netdev == netdev_work->event_netdev) {
 691                         pvrdma_netdevice_event_handle(dev, netdev_work->event);
 692                         break;
 693                 }
 694         }
 695         mutex_unlock(&pvrdma_device_list_lock);
 696
 697         kfree(netdev_work);
 698 }
 699
 700 static int pvrdma_netdevice_event(struct notifier_block *this,
 701                                   unsigned long event, void *ptr)
 702 {
 703         struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
 704         struct pvrdma_netdevice_work *netdev_work;
 705
 706         netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
 707         if (!netdev_work)
 708                 return NOTIFY_BAD;
 709
 710         INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
 711         netdev_work->event_netdev = event_netdev;
 712         netdev_work->event = event;
 713         queue_work(event_wq, &netdev_work->work);
 714
 715         return NOTIFY_DONE;
 716 }
 717
 718 static int pvrdma_pci_probe(struct pci_dev *pdev,
 719                             const struct pci_device_id *id)
 720 {
 721         struct pci_dev *pdev_net;
 722         struct pvrdma_dev *dev;
 723         int ret;
 724         unsigned long start;
 725         unsigned long len;
 726         unsigned int version;
 727         dma_addr_t slot_dma = 0;
 728
 729         dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
 730
 731         /* Allocate zero-out device */
 732         dev = (struct pvrdma_dev *)ib_alloc_device(sizeof(*dev));
 733         if (!dev) {
 734                 dev_err(&pdev->dev, "failed to allocate IB device\n");
 735                 return -ENOMEM;
 736         }
 737
 738         mutex_lock(&pvrdma_device_list_lock);
 739         list_add(&dev->device_link, &pvrdma_device_list);
 740         mutex_unlock(&pvrdma_device_list_lock);
 741
 742         ret = pvrdma_init_device(dev);
 743         if (ret)
 744                 goto err_free_device;
 745
 746         dev->pdev = pdev;
 747         pci_set_drvdata(pdev, dev);
 748
 749         ret = pci_enable_device(pdev);
 750         if (ret) {
 751                 dev_err(&pdev->dev, "cannot enable PCI device\n");
 752                 goto err_free_device;
 753         }
 754
 755         dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
 756                 pci_resource_flags(pdev, 0));
 757         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 758                 (unsigned long long)pci_resource_len(pdev, 0));
 759         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 760                 (unsigned long long)pci_resource_start(pdev, 0));
 761         dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
 762                 pci_resource_flags(pdev, 1));
 763         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 764                 (unsigned long long)pci_resource_len(pdev, 1));
 765         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 766                 (unsigned long long)pci_resource_start(pdev, 1));
 767
 768         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
 769             !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 770                 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
 771                 ret = -ENOMEM;
 772                 goto err_free_device;
 773         }
 774
 775         ret = pci_request_regions(pdev, DRV_NAME);
 776         if (ret) {
 777                 dev_err(&pdev->dev, "cannot request PCI resources\n");
 778                 goto err_disable_pdev;
 779         }
 780
 781         /* Enable 64-Bit DMA */
 782         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
 783                 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 784                 if (ret != 0) {
 785                         dev_err(&pdev->dev,
 786                                 "pci_set_consistent_dma_mask failed\n");
 787                         goto err_free_resource;
 788                 }
 789         } else {
 790                 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 791                 if (ret != 0) {
 792                         dev_err(&pdev->dev,
 793                                 "pci_set_dma_mask failed\n");
 794                         goto err_free_resource;
 795                 }
 796         }
 797
 798         pci_set_master(pdev);
 799
 800         /* Map register space */
 801         start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 802         len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 803         dev->regs = ioremap(start, len);
 804         if (!dev->regs) {
 805                 dev_err(&pdev->dev, "register mapping failed\n");
 806                 ret = -ENOMEM;
 807                 goto err_free_resource;
 808         }
 809
 810         /* Setup per-device UAR. */
 811         dev->driver_uar.index = 0;
 812         dev->driver_uar.pfn =
 813                 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
 814                 PAGE_SHIFT;
 815         dev->driver_uar.map =
 816                 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 817         if (!dev->driver_uar.map) {
 818                 dev_err(&pdev->dev, "failed to remap UAR pages\n");
 819                 ret = -ENOMEM;
 820                 goto err_unmap_regs;
 821         }
 822
 823         version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
 824         dev_info(&pdev->dev, "device version %d, driver version %d\n",
 825                  version, PVRDMA_VERSION);
 826         if (version < PVRDMA_VERSION) {
 827                 dev_err(&pdev->dev, "incompatible device version\n");
 828                 goto err_uar_unmap;
 829         }
 830
 831         dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
 832                                       &dev->dsrbase, GFP_KERNEL);
 833         if (!dev->dsr) {
 834                 dev_err(&pdev->dev, "failed to allocate shared region\n");
 835                 ret = -ENOMEM;
 836                 goto err_uar_unmap;
 837         }
 838
 839         /* Setup the shared region */
 840         memset(dev->dsr, 0, sizeof(*dev->dsr));
 841         dev->dsr->driver_version = PVRDMA_VERSION;
 842         dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 843                 PVRDMA_GOS_BITS_32 :
 844                 PVRDMA_GOS_BITS_64;
 845         dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
 846         dev->dsr->gos_info.gos_ver = 1;
 847         dev->dsr->uar_pfn = dev->driver_uar.pfn;
 848
 849         /* Command slot. */
 850         dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 851                                            &slot_dma, GFP_KERNEL);
 852         if (!dev->cmd_slot) {
 853                 ret = -ENOMEM;
 854                 goto err_free_dsr;
 855         }
 856
 857         dev->dsr->cmd_slot_dma = (u64)slot_dma;
 858
 859         /* Response slot. */
 860         dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 861                                             &slot_dma, GFP_KERNEL);
 862         if (!dev->resp_slot) {
 863                 ret = -ENOMEM;
 864                 goto err_free_slots;
 865         }
 866
 867         dev->dsr->resp_slot_dma = (u64)slot_dma;
 868
 869         /* Async event ring */
 870         dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 871         ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
 872                                    dev->dsr->async_ring_pages.num_pages, true);
 873         if (ret)
 874                 goto err_free_slots;
 875         dev->async_ring_state = dev->async_pdir.pages[0];
 876         dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
 877
 878         /* CQ notification ring */
 879         dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 880         ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
 881                                    dev->dsr->cq_ring_pages.num_pages, true);
 882         if (ret)
 883                 goto err_free_async_ring;
 884         dev->cq_ring_state = dev->cq_pdir.pages[0];
 885         dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
 886
 887         /*
 888          * Write the PA of the shared region to the device. The writes must be
 889          * ordered such that the high bits are written last. When the writes
 890          * complete, the device will have filled out the capabilities.
 891          */
 892
 893         pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
 894         pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
 895                          (u32)((u64)(dev->dsrbase) >> 32));
 896
 897         /* Make sure the write is complete before reading status. */
 898         mb();
 899
 900         /* Currently, the driver only supports RoCE mode. */
 901         if (dev->dsr->caps.mode != PVRDMA_DEVICE_MODE_ROCE) {
 902                 dev_err(&pdev->dev, "unsupported transport %d\n",
 903                         dev->dsr->caps.mode);
 904                 ret = -EFAULT;
 905                 goto err_free_cq_ring;
 906         }
 907
 908         /* Currently, the driver only supports RoCE V1. */
 909         if (!(dev->dsr->caps.gid_types & PVRDMA_GID_TYPE_FLAG_ROCE_V1)) {
 910                 dev_err(&pdev->dev, "driver needs RoCE v1 support\n");
 911                 ret = -EFAULT;
 912                 goto err_free_cq_ring;
 913         }
 914
 915         /* Paired vmxnet3 will have same bus, slot. But func will be 0 */
 916         pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
 917         if (!pdev_net) {
 918                 dev_err(&pdev->dev, "failed to find paired net device\n");
 919                 ret = -ENODEV;
 920                 goto err_free_cq_ring;
 921         }
 922
 923         if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
 924             pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
 925                 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
 926                 pci_dev_put(pdev_net);
 927                 ret = -ENODEV;
 928                 goto err_free_cq_ring;
 929         }
 930
 931         dev->netdev = pci_get_drvdata(pdev_net);
 932         pci_dev_put(pdev_net);
 933         if (!dev->netdev) {
 934                 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
 935                 ret = -ENODEV;
 936                 goto err_free_cq_ring;
 937         }
 938
 939         dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
 940
 941         /* Interrupt setup */
 942         ret = pvrdma_alloc_intrs(dev);
 943         if (ret) {
 944                 dev_err(&pdev->dev, "failed to allocate interrupts\n");
 945                 ret = -ENOMEM;
 946                 goto err_free_cq_ring;
 947         }
 948
 949         /* Allocate UAR table. */
 950         ret = pvrdma_uar_table_init(dev);
 951         if (ret) {
 952                 dev_err(&pdev->dev, "failed to allocate UAR table\n");
 953                 ret = -ENOMEM;
 954                 goto err_free_intrs;
 955         }
 956
 957         /* Allocate GID table */
 958         dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
 959                                 sizeof(union ib_gid), GFP_KERNEL);
 960         if (!dev->sgid_tbl) {
 961                 ret = -ENOMEM;
 962                 goto err_free_uar_table;
 963         }
 964         dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
 965
 966         pvrdma_enable_intrs(dev);
 967
 968         /* Activate pvrdma device */
 969         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
 970
 971         /* Make sure the write is complete before reading status. */
 972         mb();
 973
 974         /* Check if device was successfully activated */
 975         ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
 976         if (ret != 0) {
 977                 dev_err(&pdev->dev, "failed to activate device\n");
 978                 ret = -EFAULT;
 979                 goto err_disable_intr;
 980         }
 981
 982         /* Register IB device */
 983         ret = pvrdma_register_device(dev);
 984         if (ret) {
 985                 dev_err(&pdev->dev, "failed to register IB device\n");
 986                 goto err_disable_intr;
 987         }
 988
 989         dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
 990         ret = register_netdevice_notifier(&dev->nb_netdev);
 991         if (ret) {
 992                 dev_err(&pdev->dev, "failed to register netdevice events\n");
 993                 goto err_unreg_ibdev;
 994         }
 995
 996         dev_info(&pdev->dev, "attached to device\n");
 997         return 0;
 998
 999 err_unreg_ibdev:
1000         ib_unregister_device(&dev->ib_dev);
1001 err_disable_intr:
1002         pvrdma_disable_intrs(dev);
1003         kfree(dev->sgid_tbl);
1004 err_free_uar_table:
1005         pvrdma_uar_table_cleanup(dev);
1006 err_free_intrs:
1007         pvrdma_free_irq(dev);
1008         pci_free_irq_vectors(pdev);
1009 err_free_cq_ring:
1010         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1011 err_free_async_ring:
1012         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1013 err_free_slots:
1014         pvrdma_free_slots(dev);
1015 err_free_dsr:
1016         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1017                           dev->dsrbase);
1018 err_uar_unmap:
1019         iounmap(dev->driver_uar.map);
1020 err_unmap_regs:
1021         iounmap(dev->regs);
1022 err_free_resource:
1023         pci_release_regions(pdev);
1024 err_disable_pdev:
1025         pci_disable_device(pdev);
1026         pci_set_drvdata(pdev, NULL);
1027 err_free_device:
1028         mutex_lock(&pvrdma_device_list_lock);
1029         list_del(&dev->device_link);
1030         mutex_unlock(&pvrdma_device_list_lock);
1031         ib_dealloc_device(&dev->ib_dev);
1032         return ret;
1033 }
1034
1035 static void pvrdma_pci_remove(struct pci_dev *pdev)
1036 {
1037         struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1038
1039         if (!dev)
1040                 return;
1041
1042         dev_info(&pdev->dev, "detaching from device\n");
1043
1044         unregister_netdevice_notifier(&dev->nb_netdev);
1045         dev->nb_netdev.notifier_call = NULL;
1046
1047         flush_workqueue(event_wq);
1048
1049         /* Unregister ib device */
1050         ib_unregister_device(&dev->ib_dev);
1051
1052         mutex_lock(&pvrdma_device_list_lock);
1053         list_del(&dev->device_link);
1054         mutex_unlock(&pvrdma_device_list_lock);
1055
1056         pvrdma_disable_intrs(dev);
1057         pvrdma_free_irq(dev);
1058         pci_free_irq_vectors(pdev);
1059
1060         /* Deactivate pvrdma device */
1061         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1062         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1063         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1064         pvrdma_free_slots(dev);
1065
1066         iounmap(dev->regs);
1067         kfree(dev->sgid_tbl);
1068         kfree(dev->cq_tbl);
1069         kfree(dev->qp_tbl);
1070         pvrdma_uar_table_cleanup(dev);
1071         iounmap(dev->driver_uar.map);
1072
1073         ib_dealloc_device(&dev->ib_dev);
1074
1075         /* Free pci resources */
1076         pci_release_regions(pdev);
1077         pci_disable_device(pdev);
1078         pci_set_drvdata(pdev, NULL);
1079 }
1080
1081 static struct pci_device_id pvrdma_pci_table[] = {
1082         { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1083         { 0 },
1084 };
1085
1086 MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1087
1088 static struct pci_driver pvrdma_driver = {
1089         .name           = DRV_NAME,
1090         .id_table       = pvrdma_pci_table,
1091         .probe          = pvrdma_pci_probe,
1092         .remove         = pvrdma_pci_remove,
1093 };
1094
1095 static int __init pvrdma_init(void)
1096 {
1097         int err;
1098
1099         event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1100         if (!event_wq)
1101                 return -ENOMEM;
1102
1103         err = pci_register_driver(&pvrdma_driver);
1104         if (err)
1105                 destroy_workqueue(event_wq);
1106
1107         return err;
1108 }
1109
1110 static void __exit pvrdma_cleanup(void)
1111 {
1112         pci_unregister_driver(&pvrdma_driver);
1113
1114         destroy_workqueue(event_wq);
1115 }
1116
1117 module_init(pvrdma_init);
1118 module_exit(pvrdma_cleanup);
1119
1120 MODULE_AUTHOR("VMware, Inc");
1121 MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1122 MODULE_VERSION(DRV_VERSION);
1123 MODULE_LICENSE("Dual BSD/GPL");