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(const struct ib_gid_attr *attr, void **context);
  66 static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context);
  67
  68 static ssize_t hca_type_show(struct device *device,
  69                              struct device_attribute *attr, char *buf)
  70 {
  71         return sysfs_emit(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
  72 }
  73 static DEVICE_ATTR_RO(hca_type);
  74
  75 static ssize_t hw_rev_show(struct device *device,
  76                            struct device_attribute *attr, char *buf)
  77 {
  78         return sysfs_emit(buf, "%d\n", PVRDMA_REV_ID);
  79 }
  80 static DEVICE_ATTR_RO(hw_rev);
  81
  82 static ssize_t board_id_show(struct device *device,
  83                              struct device_attribute *attr, char *buf)
  84 {
  85         return sysfs_emit(buf, "%d\n", PVRDMA_BOARD_ID);
  86 }
  87 static DEVICE_ATTR_RO(board_id);
  88
  89 static struct attribute *pvrdma_class_attributes[] = {
  90         &dev_attr_hw_rev.attr,
  91         &dev_attr_hca_type.attr,
  92         &dev_attr_board_id.attr,
  93         NULL,
  94 };
  95
  96 static const struct attribute_group pvrdma_attr_group = {
  97         .attrs = pvrdma_class_attributes,
  98 };
  99
 100 static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str)
 101 {
 102         struct pvrdma_dev *dev =
 103                 container_of(device, struct pvrdma_dev, ib_dev);
 104         snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n",
 105                  (int) (dev->dsr->caps.fw_ver >> 32),
 106                  (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
 107                  (int) dev->dsr->caps.fw_ver & 0xffff);
 108 }
 109
 110 static int pvrdma_init_device(struct pvrdma_dev *dev)
 111 {
 112         /*  Initialize some device related stuff */
 113         spin_lock_init(&dev->cmd_lock);
 114         sema_init(&dev->cmd_sema, 1);
 115         atomic_set(&dev->num_qps, 0);
 116         atomic_set(&dev->num_srqs, 0);
 117         atomic_set(&dev->num_cqs, 0);
 118         atomic_set(&dev->num_pds, 0);
 119         atomic_set(&dev->num_ahs, 0);
 120
 121         return 0;
 122 }
 123
 124 static int pvrdma_port_immutable(struct ib_device *ibdev, u32 port_num,
 125                                  struct ib_port_immutable *immutable)
 126 {
 127         struct pvrdma_dev *dev = to_vdev(ibdev);
 128         struct ib_port_attr attr;
 129         int err;
 130
 131         if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V1)
 132                 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE;
 133         else if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V2)
 134                 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
 135
 136         err = ib_query_port(ibdev, port_num, &attr);
 137         if (err)
 138                 return err;
 139
 140         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 141         immutable->gid_tbl_len = attr.gid_tbl_len;
 142         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 143         return 0;
 144 }
 145
 146 static const struct ib_device_ops pvrdma_dev_ops = {
 147         .owner = THIS_MODULE,
 148         .driver_id = RDMA_DRIVER_VMW_PVRDMA,
 149         .uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION,
 150
 151         .add_gid = pvrdma_add_gid,
 152         .alloc_mr = pvrdma_alloc_mr,
 153         .alloc_pd = pvrdma_alloc_pd,
 154         .alloc_ucontext = pvrdma_alloc_ucontext,
 155         .create_ah = pvrdma_create_ah,
 156         .create_cq = pvrdma_create_cq,
 157         .create_qp = pvrdma_create_qp,
 158         .dealloc_pd = pvrdma_dealloc_pd,
 159         .dealloc_ucontext = pvrdma_dealloc_ucontext,
 160         .del_gid = pvrdma_del_gid,
 161         .dereg_mr = pvrdma_dereg_mr,
 162         .destroy_ah = pvrdma_destroy_ah,
 163         .destroy_cq = pvrdma_destroy_cq,
 164         .destroy_qp = pvrdma_destroy_qp,
 165         .device_group = &pvrdma_attr_group,
 166         .get_dev_fw_str = pvrdma_get_fw_ver_str,
 167         .get_dma_mr = pvrdma_get_dma_mr,
 168         .get_link_layer = pvrdma_port_link_layer,
 169         .get_port_immutable = pvrdma_port_immutable,
 170         .map_mr_sg = pvrdma_map_mr_sg,
 171         .mmap = pvrdma_mmap,
 172         .modify_port = pvrdma_modify_port,
 173         .modify_qp = pvrdma_modify_qp,
 174         .poll_cq = pvrdma_poll_cq,
 175         .post_recv = pvrdma_post_recv,
 176         .post_send = pvrdma_post_send,
 177         .query_device = pvrdma_query_device,
 178         .query_gid = pvrdma_query_gid,
 179         .query_pkey = pvrdma_query_pkey,
 180         .query_port = pvrdma_query_port,
 181         .query_qp = pvrdma_query_qp,
 182         .reg_user_mr = pvrdma_reg_user_mr,
 183         .req_notify_cq = pvrdma_req_notify_cq,
 184
 185         INIT_RDMA_OBJ_SIZE(ib_ah, pvrdma_ah, ibah),
 186         INIT_RDMA_OBJ_SIZE(ib_cq, pvrdma_cq, ibcq),
 187         INIT_RDMA_OBJ_SIZE(ib_pd, pvrdma_pd, ibpd),
 188         INIT_RDMA_OBJ_SIZE(ib_qp, pvrdma_qp, ibqp),
 189         INIT_RDMA_OBJ_SIZE(ib_ucontext, pvrdma_ucontext, ibucontext),
 190 };
 191
 192 static const struct ib_device_ops pvrdma_dev_srq_ops = {
 193         .create_srq = pvrdma_create_srq,
 194         .destroy_srq = pvrdma_destroy_srq,
 195         .modify_srq = pvrdma_modify_srq,
 196         .query_srq = pvrdma_query_srq,
 197
 198         INIT_RDMA_OBJ_SIZE(ib_srq, pvrdma_srq, ibsrq),
 199 };
 200
 201 static int pvrdma_register_device(struct pvrdma_dev *dev)
 202 {
 203         int ret = -1;
 204
 205         dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
 206         dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
 207         dev->flags = 0;
 208         dev->ib_dev.num_comp_vectors = 1;
 209         dev->ib_dev.dev.parent = &dev->pdev->dev;
 210
 211         dev->ib_dev.node_type = RDMA_NODE_IB_CA;
 212         dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
 213
 214         ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_ops);
 215
 216         mutex_init(&dev->port_mutex);
 217         spin_lock_init(&dev->desc_lock);
 218
 219         dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *),
 220                               GFP_KERNEL);
 221         if (!dev->cq_tbl)
 222                 return ret;
 223         spin_lock_init(&dev->cq_tbl_lock);
 224
 225         dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *),
 226                               GFP_KERNEL);
 227         if (!dev->qp_tbl)
 228                 goto err_cq_free;
 229         spin_lock_init(&dev->qp_tbl_lock);
 230
 231         /* Check if SRQ is supported by backend */
 232         if (dev->dsr->caps.max_srq) {
 233                 ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_srq_ops);
 234
 235                 dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
 236                                        sizeof(struct pvrdma_srq *),
 237                                        GFP_KERNEL);
 238                 if (!dev->srq_tbl)
 239                         goto err_qp_free;
 240         }
 241         ret = ib_device_set_netdev(&dev->ib_dev, dev->netdev, 1);
 242         if (ret)
 243                 goto err_srq_free;
 244         spin_lock_init(&dev->srq_tbl_lock);
 245
 246         ret = ib_register_device(&dev->ib_dev, "vmw_pvrdma%d", &dev->pdev->dev);
 247         if (ret)
 248                 goto err_srq_free;
 249
 250         dev->ib_active = true;
 251
 252         return 0;
 253
 254 err_srq_free:
 255         kfree(dev->srq_tbl);
 256 err_qp_free:
 257         kfree(dev->qp_tbl);
 258 err_cq_free:
 259         kfree(dev->cq_tbl);
 260
 261         return ret;
 262 }
 263
 264 static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
 265 {
 266         u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
 267         struct pvrdma_dev *dev = dev_id;
 268
 269         dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
 270
 271         if (!dev->pdev->msix_enabled) {
 272                 /* Legacy intr */
 273                 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
 274                 if (icr == 0)
 275                         return IRQ_NONE;
 276         }
 277
 278         if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
 279                 complete(&dev->cmd_done);
 280
 281         return IRQ_HANDLED;
 282 }
 283
 284 static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
 285 {
 286         struct pvrdma_qp *qp;
 287         unsigned long flags;
 288
 289         spin_lock_irqsave(&dev->qp_tbl_lock, flags);
 290         qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
 291         if (qp)
 292                 refcount_inc(&qp->refcnt);
 293         spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
 294
 295         if (qp && qp->ibqp.event_handler) {
 296                 struct ib_qp *ibqp = &qp->ibqp;
 297                 struct ib_event e;
 298
 299                 e.device = ibqp->device;
 300                 e.element.qp = ibqp;
 301                 e.event = type; /* 1:1 mapping for now. */
 302                 ibqp->event_handler(&e, ibqp->qp_context);
 303         }
 304         if (qp) {
 305                 if (refcount_dec_and_test(&qp->refcnt))
 306                         complete(&qp->free);
 307         }
 308 }
 309
 310 static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
 311 {
 312         struct pvrdma_cq *cq;
 313         unsigned long flags;
 314
 315         spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 316         cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
 317         if (cq)
 318                 refcount_inc(&cq->refcnt);
 319         spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 320
 321         if (cq && cq->ibcq.event_handler) {
 322                 struct ib_cq *ibcq = &cq->ibcq;
 323                 struct ib_event e;
 324
 325                 e.device = ibcq->device;
 326                 e.element.cq = ibcq;
 327                 e.event = type; /* 1:1 mapping for now. */
 328                 ibcq->event_handler(&e, ibcq->cq_context);
 329         }
 330         if (cq) {
 331                 if (refcount_dec_and_test(&cq->refcnt))
 332                         complete(&cq->free);
 333         }
 334 }
 335
 336 static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
 337 {
 338         struct pvrdma_srq *srq;
 339         unsigned long flags;
 340
 341         spin_lock_irqsave(&dev->srq_tbl_lock, flags);
 342         if (dev->srq_tbl)
 343                 srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
 344         else
 345                 srq = NULL;
 346         if (srq)
 347                 refcount_inc(&srq->refcnt);
 348         spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
 349
 350         if (srq && srq->ibsrq.event_handler) {
 351                 struct ib_srq *ibsrq = &srq->ibsrq;
 352                 struct ib_event e;
 353
 354                 e.device = ibsrq->device;
 355                 e.element.srq = ibsrq;
 356                 e.event = type; /* 1:1 mapping for now. */
 357                 ibsrq->event_handler(&e, ibsrq->srq_context);
 358         }
 359         if (srq) {
 360                 if (refcount_dec_and_test(&srq->refcnt))
 361                         complete(&srq->free);
 362         }
 363 }
 364
 365 static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
 366                                   enum ib_event_type event)
 367 {
 368         struct ib_event ib_event;
 369
 370         memset(&ib_event, 0, sizeof(ib_event));
 371         ib_event.device = &dev->ib_dev;
 372         ib_event.element.port_num = port;
 373         ib_event.event = event;
 374         ib_dispatch_event(&ib_event);
 375 }
 376
 377 static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
 378 {
 379         if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
 380                 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
 381                 return;
 382         }
 383
 384         pvrdma_dispatch_event(dev, port, type);
 385 }
 386
 387 static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
 388 {
 389         return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
 390                                         &dev->async_pdir,
 391                                         PAGE_SIZE +
 392                                         sizeof(struct pvrdma_eqe) * i);
 393 }
 394
 395 static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
 396 {
 397         struct pvrdma_dev *dev = dev_id;
 398         struct pvrdma_ring *ring = &dev->async_ring_state->rx;
 399         int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
 400                          PAGE_SIZE / sizeof(struct pvrdma_eqe);
 401         unsigned int head;
 402
 403         dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
 404
 405         /*
 406          * Don't process events until the IB device is registered. Otherwise
 407          * we'll try to ib_dispatch_event() on an invalid device.
 408          */
 409         if (!dev->ib_active)
 410                 return IRQ_HANDLED;
 411
 412         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 413                 struct pvrdma_eqe *eqe;
 414
 415                 eqe = get_eqe(dev, head);
 416
 417                 switch (eqe->type) {
 418                 case PVRDMA_EVENT_QP_FATAL:
 419                 case PVRDMA_EVENT_QP_REQ_ERR:
 420                 case PVRDMA_EVENT_QP_ACCESS_ERR:
 421                 case PVRDMA_EVENT_COMM_EST:
 422                 case PVRDMA_EVENT_SQ_DRAINED:
 423                 case PVRDMA_EVENT_PATH_MIG:
 424                 case PVRDMA_EVENT_PATH_MIG_ERR:
 425                 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
 426                         pvrdma_qp_event(dev, eqe->info, eqe->type);
 427                         break;
 428
 429                 case PVRDMA_EVENT_CQ_ERR:
 430                         pvrdma_cq_event(dev, eqe->info, eqe->type);
 431                         break;
 432
 433                 case PVRDMA_EVENT_SRQ_ERR:
 434                 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
 435                         pvrdma_srq_event(dev, eqe->info, eqe->type);
 436                         break;
 437
 438                 case PVRDMA_EVENT_PORT_ACTIVE:
 439                 case PVRDMA_EVENT_PORT_ERR:
 440                 case PVRDMA_EVENT_LID_CHANGE:
 441                 case PVRDMA_EVENT_PKEY_CHANGE:
 442                 case PVRDMA_EVENT_SM_CHANGE:
 443                 case PVRDMA_EVENT_CLIENT_REREGISTER:
 444                 case PVRDMA_EVENT_GID_CHANGE:
 445                         pvrdma_dev_event(dev, eqe->info, eqe->type);
 446                         break;
 447
 448                 case PVRDMA_EVENT_DEVICE_FATAL:
 449                         pvrdma_dev_event(dev, 1, eqe->type);
 450                         break;
 451
 452                 default:
 453                         break;
 454                 }
 455
 456                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 457         }
 458
 459         return IRQ_HANDLED;
 460 }
 461
 462 static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
 463                                            unsigned int i)
 464 {
 465         return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
 466                                         &dev->cq_pdir,
 467                                         PAGE_SIZE +
 468                                         sizeof(struct pvrdma_cqne) * i);
 469 }
 470
 471 static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
 472 {
 473         struct pvrdma_dev *dev = dev_id;
 474         struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
 475         int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
 476                          sizeof(struct pvrdma_cqne);
 477         unsigned int head;
 478
 479         dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
 480
 481         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 482                 struct pvrdma_cqne *cqne;
 483                 struct pvrdma_cq *cq;
 484
 485                 cqne = get_cqne(dev, head);
 486                 spin_lock(&dev->cq_tbl_lock);
 487                 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
 488                 if (cq)
 489                         refcount_inc(&cq->refcnt);
 490                 spin_unlock(&dev->cq_tbl_lock);
 491
 492                 if (cq && cq->ibcq.comp_handler)
 493                         cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
 494                 if (cq) {
 495                         if (refcount_dec_and_test(&cq->refcnt))
 496                                 complete(&cq->free);
 497                 }
 498                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 499         }
 500
 501         return IRQ_HANDLED;
 502 }
 503
 504 static void pvrdma_free_irq(struct pvrdma_dev *dev)
 505 {
 506         int i;
 507
 508         dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
 509         for (i = 0; i < dev->nr_vectors; i++)
 510                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 511 }
 512
 513 static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
 514 {
 515         dev_dbg(&dev->pdev->dev, "enable interrupts\n");
 516         pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
 517 }
 518
 519 static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
 520 {
 521         dev_dbg(&dev->pdev->dev, "disable interrupts\n");
 522         pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
 523 }
 524
 525 static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
 526 {
 527         struct pci_dev *pdev = dev->pdev;
 528         int ret = 0, i;
 529
 530         ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
 531                         PCI_IRQ_MSIX);
 532         if (ret < 0) {
 533                 ret = pci_alloc_irq_vectors(pdev, 1, 1,
 534                                 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
 535                 if (ret < 0)
 536                         return ret;
 537         }
 538         dev->nr_vectors = ret;
 539
 540         ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
 541                         pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
 542         if (ret) {
 543                 dev_err(&dev->pdev->dev,
 544                         "failed to request interrupt 0\n");
 545                 goto out_free_vectors;
 546         }
 547
 548         for (i = 1; i < dev->nr_vectors; i++) {
 549                 ret = request_irq(pci_irq_vector(dev->pdev, i),
 550                                 i == 1 ? pvrdma_intr1_handler :
 551                                          pvrdma_intrx_handler,
 552                                 0, DRV_NAME, dev);
 553                 if (ret) {
 554                         dev_err(&dev->pdev->dev,
 555                                 "failed to request interrupt %d\n", i);
 556                         goto free_irqs;
 557                 }
 558         }
 559
 560         return 0;
 561
 562 free_irqs:
 563         while (--i >= 0)
 564                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 565 out_free_vectors:
 566         pci_free_irq_vectors(pdev);
 567         return ret;
 568 }
 569
 570 static void pvrdma_free_slots(struct pvrdma_dev *dev)
 571 {
 572         struct pci_dev *pdev = dev->pdev;
 573
 574         if (dev->resp_slot)
 575                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
 576                                   dev->dsr->resp_slot_dma);
 577         if (dev->cmd_slot)
 578                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
 579                                   dev->dsr->cmd_slot_dma);
 580 }
 581
 582 static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
 583                                    const union ib_gid *gid,
 584                                    u8 gid_type,
 585                                    int index)
 586 {
 587         int ret;
 588         union pvrdma_cmd_req req;
 589         struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
 590
 591         if (!dev->sgid_tbl) {
 592                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 593                 return -EINVAL;
 594         }
 595
 596         memset(cmd_bind, 0, sizeof(*cmd_bind));
 597         cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
 598         memcpy(cmd_bind->new_gid, gid->raw, 16);
 599         cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
 600         cmd_bind->vlan = 0xfff;
 601         cmd_bind->index = index;
 602         cmd_bind->gid_type = gid_type;
 603
 604         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 605         if (ret < 0) {
 606                 dev_warn(&dev->pdev->dev,
 607                          "could not create binding, error: %d\n", ret);
 608                 return -EFAULT;
 609         }
 610         memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
 611         return 0;
 612 }
 613
 614 static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context)
 615 {
 616         struct pvrdma_dev *dev = to_vdev(attr->device);
 617
 618         return pvrdma_add_gid_at_index(dev, &attr->gid,
 619                                        ib_gid_type_to_pvrdma(attr->gid_type),
 620                                        attr->index);
 621 }
 622
 623 static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
 624 {
 625         int ret;
 626         union pvrdma_cmd_req req;
 627         struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
 628
 629         /* Update sgid table. */
 630         if (!dev->sgid_tbl) {
 631                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 632                 return -EINVAL;
 633         }
 634
 635         memset(cmd_dest, 0, sizeof(*cmd_dest));
 636         cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
 637         memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
 638         cmd_dest->index = index;
 639
 640         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 641         if (ret < 0) {
 642                 dev_warn(&dev->pdev->dev,
 643                          "could not destroy binding, error: %d\n", ret);
 644                 return ret;
 645         }
 646         memset(&dev->sgid_tbl[index], 0, 16);
 647         return 0;
 648 }
 649
 650 static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context)
 651 {
 652         struct pvrdma_dev *dev = to_vdev(attr->device);
 653
 654         dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
 655                 attr->index, dev->netdev->name);
 656
 657         return pvrdma_del_gid_at_index(dev, attr->index);
 658 }
 659
 660 static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 661                                           struct net_device *ndev,
 662                                           unsigned long event)
 663 {
 664         struct pci_dev *pdev_net;
 665         unsigned int slot;
 666
 667         switch (event) {
 668         case NETDEV_REBOOT:
 669         case NETDEV_DOWN:
 670                 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 671                 break;
 672         case NETDEV_UP:
 673                 pvrdma_write_reg(dev, PVRDMA_REG_CTL,
 674                                  PVRDMA_DEVICE_CTL_UNQUIESCE);
 675
 676                 mb();
 677
 678                 if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
 679                         dev_err(&dev->pdev->dev,
 680                                 "failed to activate device during link up\n");
 681                 else
 682                         pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 683                 break;
 684         case NETDEV_UNREGISTER:
 685                 ib_device_set_netdev(&dev->ib_dev, NULL, 1);
 686                 dev_put(dev->netdev);
 687                 dev->netdev = NULL;
 688                 break;
 689         case NETDEV_REGISTER:
 690                 /* vmxnet3 will have same bus, slot. But func will be 0 */
 691                 slot = PCI_SLOT(dev->pdev->devfn);
 692                 pdev_net = pci_get_slot(dev->pdev->bus,
 693                                         PCI_DEVFN(slot, 0));
 694                 if ((dev->netdev == NULL) &&
 695                     (pci_get_drvdata(pdev_net) == ndev)) {
 696                         /* this is our netdev */
 697                         ib_device_set_netdev(&dev->ib_dev, ndev, 1);
 698                         dev->netdev = ndev;
 699                         dev_hold(ndev);
 700                 }
 701                 pci_dev_put(pdev_net);
 702                 break;
 703
 704         default:
 705                 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
 706                         event, dev_name(&dev->ib_dev.dev));
 707                 break;
 708         }
 709 }
 710
 711 static void pvrdma_netdevice_event_work(struct work_struct *work)
 712 {
 713         struct pvrdma_netdevice_work *netdev_work;
 714         struct pvrdma_dev *dev;
 715
 716         netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
 717
 718         mutex_lock(&pvrdma_device_list_lock);
 719         list_for_each_entry(dev, &pvrdma_device_list, device_link) {
 720                 if ((netdev_work->event == NETDEV_REGISTER) ||
 721                     (dev->netdev == netdev_work->event_netdev)) {
 722                         pvrdma_netdevice_event_handle(dev,
 723                                                       netdev_work->event_netdev,
 724                                                       netdev_work->event);
 725                         break;
 726                 }
 727         }
 728         mutex_unlock(&pvrdma_device_list_lock);
 729
 730         kfree(netdev_work);
 731 }
 732
 733 static int pvrdma_netdevice_event(struct notifier_block *this,
 734                                   unsigned long event, void *ptr)
 735 {
 736         struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
 737         struct pvrdma_netdevice_work *netdev_work;
 738
 739         netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
 740         if (!netdev_work)
 741                 return NOTIFY_BAD;
 742
 743         INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
 744         netdev_work->event_netdev = event_netdev;
 745         netdev_work->event = event;
 746         queue_work(event_wq, &netdev_work->work);
 747
 748         return NOTIFY_DONE;
 749 }
 750
 751 static int pvrdma_pci_probe(struct pci_dev *pdev,
 752                             const struct pci_device_id *id)
 753 {
 754         struct pci_dev *pdev_net;
 755         struct pvrdma_dev *dev;
 756         int ret;
 757         unsigned long start;
 758         unsigned long len;
 759         dma_addr_t slot_dma = 0;
 760
 761         dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
 762
 763         /* Allocate zero-out device */
 764         dev = ib_alloc_device(pvrdma_dev, ib_dev);
 765         if (!dev) {
 766                 dev_err(&pdev->dev, "failed to allocate IB device\n");
 767                 return -ENOMEM;
 768         }
 769
 770         mutex_lock(&pvrdma_device_list_lock);
 771         list_add(&dev->device_link, &pvrdma_device_list);
 772         mutex_unlock(&pvrdma_device_list_lock);
 773
 774         ret = pvrdma_init_device(dev);
 775         if (ret)
 776                 goto err_free_device;
 777
 778         dev->pdev = pdev;
 779         pci_set_drvdata(pdev, dev);
 780
 781         ret = pci_enable_device(pdev);
 782         if (ret) {
 783                 dev_err(&pdev->dev, "cannot enable PCI device\n");
 784                 goto err_free_device;
 785         }
 786
 787         dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
 788                 pci_resource_flags(pdev, 0));
 789         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 790                 (unsigned long long)pci_resource_len(pdev, 0));
 791         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 792                 (unsigned long long)pci_resource_start(pdev, 0));
 793         dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
 794                 pci_resource_flags(pdev, 1));
 795         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 796                 (unsigned long long)pci_resource_len(pdev, 1));
 797         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 798                 (unsigned long long)pci_resource_start(pdev, 1));
 799
 800         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
 801             !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 802                 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
 803                 ret = -ENOMEM;
 804                 goto err_disable_pdev;
 805         }
 806
 807         ret = pci_request_regions(pdev, DRV_NAME);
 808         if (ret) {
 809                 dev_err(&pdev->dev, "cannot request PCI resources\n");
 810                 goto err_disable_pdev;
 811         }
 812
 813         /* Enable 64-Bit DMA */
 814         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 815         if (ret) {
 816                 dev_err(&pdev->dev, "dma_set_mask failed\n");
 817                 goto err_free_resource;
 818         }
 819         dma_set_max_seg_size(&pdev->dev, UINT_MAX);
 820         pci_set_master(pdev);
 821
 822         /* Map register space */
 823         start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 824         len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 825         dev->regs = ioremap(start, len);
 826         if (!dev->regs) {
 827                 dev_err(&pdev->dev, "register mapping failed\n");
 828                 ret = -ENOMEM;
 829                 goto err_free_resource;
 830         }
 831
 832         /* Setup per-device UAR. */
 833         dev->driver_uar.index = 0;
 834         dev->driver_uar.pfn =
 835                 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
 836                 PAGE_SHIFT;
 837         dev->driver_uar.map =
 838                 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 839         if (!dev->driver_uar.map) {
 840                 dev_err(&pdev->dev, "failed to remap UAR pages\n");
 841                 ret = -ENOMEM;
 842                 goto err_unmap_regs;
 843         }
 844
 845         dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
 846         dev_info(&pdev->dev, "device version %d, driver version %d\n",
 847                  dev->dsr_version, PVRDMA_VERSION);
 848
 849         dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
 850                                       &dev->dsrbase, GFP_KERNEL);
 851         if (!dev->dsr) {
 852                 dev_err(&pdev->dev, "failed to allocate shared region\n");
 853                 ret = -ENOMEM;
 854                 goto err_uar_unmap;
 855         }
 856
 857         /* Setup the shared region */
 858         dev->dsr->driver_version = PVRDMA_VERSION;
 859         dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 860                 PVRDMA_GOS_BITS_32 :
 861                 PVRDMA_GOS_BITS_64;
 862         dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
 863         dev->dsr->gos_info.gos_ver = 1;
 864
 865         if (dev->dsr_version < PVRDMA_PPN64_VERSION)
 866                 dev->dsr->uar_pfn = dev->driver_uar.pfn;
 867         else
 868                 dev->dsr->uar_pfn64 = dev->driver_uar.pfn;
 869
 870         /* Command slot. */
 871         dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 872                                            &slot_dma, GFP_KERNEL);
 873         if (!dev->cmd_slot) {
 874                 ret = -ENOMEM;
 875                 goto err_free_dsr;
 876         }
 877
 878         dev->dsr->cmd_slot_dma = (u64)slot_dma;
 879
 880         /* Response slot. */
 881         dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 882                                             &slot_dma, GFP_KERNEL);
 883         if (!dev->resp_slot) {
 884                 ret = -ENOMEM;
 885                 goto err_free_slots;
 886         }
 887
 888         dev->dsr->resp_slot_dma = (u64)slot_dma;
 889
 890         /* Async event ring */
 891         dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 892         ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
 893                                    dev->dsr->async_ring_pages.num_pages, true);
 894         if (ret)
 895                 goto err_free_slots;
 896         dev->async_ring_state = dev->async_pdir.pages[0];
 897         dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
 898
 899         /* CQ notification ring */
 900         dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 901         ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
 902                                    dev->dsr->cq_ring_pages.num_pages, true);
 903         if (ret)
 904                 goto err_free_async_ring;
 905         dev->cq_ring_state = dev->cq_pdir.pages[0];
 906         dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
 907
 908         /*
 909          * Write the PA of the shared region to the device. The writes must be
 910          * ordered such that the high bits are written last. When the writes
 911          * complete, the device will have filled out the capabilities.
 912          */
 913
 914         pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
 915         pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
 916                          (u32)((u64)(dev->dsrbase) >> 32));
 917
 918         /* Make sure the write is complete before reading status. */
 919         mb();
 920
 921         /* The driver supports RoCE V1 and V2. */
 922         if (!PVRDMA_SUPPORTED(dev)) {
 923                 dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
 924                 ret = -EFAULT;
 925                 goto err_free_cq_ring;
 926         }
 927
 928         /* Paired vmxnet3 will have same bus, slot. But func will be 0 */
 929         pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
 930         if (!pdev_net) {
 931                 dev_err(&pdev->dev, "failed to find paired net device\n");
 932                 ret = -ENODEV;
 933                 goto err_free_cq_ring;
 934         }
 935
 936         if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
 937             pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
 938                 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
 939                 pci_dev_put(pdev_net);
 940                 ret = -ENODEV;
 941                 goto err_free_cq_ring;
 942         }
 943
 944         dev->netdev = pci_get_drvdata(pdev_net);
 945         pci_dev_put(pdev_net);
 946         if (!dev->netdev) {
 947                 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
 948                 ret = -ENODEV;
 949                 goto err_free_cq_ring;
 950         }
 951         dev_hold(dev->netdev);
 952
 953         dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
 954
 955         /* Interrupt setup */
 956         ret = pvrdma_alloc_intrs(dev);
 957         if (ret) {
 958                 dev_err(&pdev->dev, "failed to allocate interrupts\n");
 959                 ret = -ENOMEM;
 960                 goto err_free_cq_ring;
 961         }
 962
 963         /* Allocate UAR table. */
 964         ret = pvrdma_uar_table_init(dev);
 965         if (ret) {
 966                 dev_err(&pdev->dev, "failed to allocate UAR table\n");
 967                 ret = -ENOMEM;
 968                 goto err_free_intrs;
 969         }
 970
 971         /* Allocate GID table */
 972         dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
 973                                 sizeof(union ib_gid), GFP_KERNEL);
 974         if (!dev->sgid_tbl) {
 975                 ret = -ENOMEM;
 976                 goto err_free_uar_table;
 977         }
 978         dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
 979
 980         pvrdma_enable_intrs(dev);
 981
 982         /* Activate pvrdma device */
 983         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
 984
 985         /* Make sure the write is complete before reading status. */
 986         mb();
 987
 988         /* Check if device was successfully activated */
 989         ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
 990         if (ret != 0) {
 991                 dev_err(&pdev->dev, "failed to activate device\n");
 992                 ret = -EFAULT;
 993                 goto err_disable_intr;
 994         }
 995
 996         /* Register IB device */
 997         ret = pvrdma_register_device(dev);
 998         if (ret) {
 999                 dev_err(&pdev->dev, "failed to register IB device\n");
1000                 goto err_disable_intr;
1001         }
1002
1003         dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1004         ret = register_netdevice_notifier(&dev->nb_netdev);
1005         if (ret) {
1006                 dev_err(&pdev->dev, "failed to register netdevice events\n");
1007                 goto err_unreg_ibdev;
1008         }
1009
1010         dev_info(&pdev->dev, "attached to device\n");
1011         return 0;
1012
1013 err_unreg_ibdev:
1014         ib_unregister_device(&dev->ib_dev);
1015 err_disable_intr:
1016         pvrdma_disable_intrs(dev);
1017         kfree(dev->sgid_tbl);
1018 err_free_uar_table:
1019         pvrdma_uar_table_cleanup(dev);
1020 err_free_intrs:
1021         pvrdma_free_irq(dev);
1022         pci_free_irq_vectors(pdev);
1023 err_free_cq_ring:
1024         dev_put(dev->netdev);
1025         dev->netdev = NULL;
1026         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1027 err_free_async_ring:
1028         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1029 err_free_slots:
1030         pvrdma_free_slots(dev);
1031 err_free_dsr:
1032         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1033                           dev->dsrbase);
1034 err_uar_unmap:
1035         iounmap(dev->driver_uar.map);
1036 err_unmap_regs:
1037         iounmap(dev->regs);
1038 err_free_resource:
1039         pci_release_regions(pdev);
1040 err_disable_pdev:
1041         pci_disable_device(pdev);
1042         pci_set_drvdata(pdev, NULL);
1043 err_free_device:
1044         mutex_lock(&pvrdma_device_list_lock);
1045         list_del(&dev->device_link);
1046         mutex_unlock(&pvrdma_device_list_lock);
1047         ib_dealloc_device(&dev->ib_dev);
1048         return ret;
1049 }
1050
1051 static void pvrdma_pci_remove(struct pci_dev *pdev)
1052 {
1053         struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1054
1055         if (!dev)
1056                 return;
1057
1058         dev_info(&pdev->dev, "detaching from device\n");
1059
1060         unregister_netdevice_notifier(&dev->nb_netdev);
1061         dev->nb_netdev.notifier_call = NULL;
1062
1063         flush_workqueue(event_wq);
1064
1065         dev_put(dev->netdev);
1066         dev->netdev = NULL;
1067
1068         /* Unregister ib device */
1069         ib_unregister_device(&dev->ib_dev);
1070
1071         mutex_lock(&pvrdma_device_list_lock);
1072         list_del(&dev->device_link);
1073         mutex_unlock(&pvrdma_device_list_lock);
1074
1075         pvrdma_disable_intrs(dev);
1076         pvrdma_free_irq(dev);
1077         pci_free_irq_vectors(pdev);
1078
1079         /* Deactivate pvrdma device */
1080         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1081         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1082         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1083         pvrdma_free_slots(dev);
1084         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1085                           dev->dsrbase);
1086
1087         iounmap(dev->regs);
1088         kfree(dev->sgid_tbl);
1089         kfree(dev->cq_tbl);
1090         kfree(dev->srq_tbl);
1091         kfree(dev->qp_tbl);
1092         pvrdma_uar_table_cleanup(dev);
1093         iounmap(dev->driver_uar.map);
1094
1095         ib_dealloc_device(&dev->ib_dev);
1096
1097         /* Free pci resources */
1098         pci_release_regions(pdev);
1099         pci_disable_device(pdev);
1100         pci_set_drvdata(pdev, NULL);
1101 }
1102
1103 static const struct pci_device_id pvrdma_pci_table[] = {
1104         { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1105         { 0 },
1106 };
1107
1108 MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1109
1110 static struct pci_driver pvrdma_driver = {
1111         .name           = DRV_NAME,
1112         .id_table       = pvrdma_pci_table,
1113         .probe          = pvrdma_pci_probe,
1114         .remove         = pvrdma_pci_remove,
1115 };
1116
1117 static int __init pvrdma_init(void)
1118 {
1119         int err;
1120
1121         event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1122         if (!event_wq)
1123                 return -ENOMEM;
1124
1125         err = pci_register_driver(&pvrdma_driver);
1126         if (err)
1127                 destroy_workqueue(event_wq);
1128
1129         return err;
1130 }
1131
1132 static void __exit pvrdma_cleanup(void)
1133 {
1134         pci_unregister_driver(&pvrdma_driver);
1135
1136         destroy_workqueue(event_wq);
1137 }
1138
1139 module_init(pvrdma_init);
1140 module_exit(pvrdma_cleanup);
1141
1142 MODULE_AUTHOR("VMware, Inc");
1143 MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1144 MODULE_LICENSE("Dual BSD/GPL");