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(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 sprintf(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 sprintf(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 sprintf(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, u8 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         .add_gid = pvrdma_add_gid,
 148         .alloc_mr = pvrdma_alloc_mr,
 149         .alloc_pd = pvrdma_alloc_pd,
 150         .alloc_ucontext = pvrdma_alloc_ucontext,
 151         .create_ah = pvrdma_create_ah,
 152         .create_cq = pvrdma_create_cq,
 153         .create_qp = pvrdma_create_qp,
 154         .dealloc_pd = pvrdma_dealloc_pd,
 155         .dealloc_ucontext = pvrdma_dealloc_ucontext,
 156         .del_gid = pvrdma_del_gid,
 157         .dereg_mr = pvrdma_dereg_mr,
 158         .destroy_ah = pvrdma_destroy_ah,
 159         .destroy_cq = pvrdma_destroy_cq,
 160         .destroy_qp = pvrdma_destroy_qp,
 161         .get_dev_fw_str = pvrdma_get_fw_ver_str,
 162         .get_dma_mr = pvrdma_get_dma_mr,
 163         .get_link_layer = pvrdma_port_link_layer,
 164         .get_port_immutable = pvrdma_port_immutable,
 165         .map_mr_sg = pvrdma_map_mr_sg,
 166         .mmap = pvrdma_mmap,
 167         .modify_port = pvrdma_modify_port,
 168         .modify_qp = pvrdma_modify_qp,
 169         .poll_cq = pvrdma_poll_cq,
 170         .post_recv = pvrdma_post_recv,
 171         .post_send = pvrdma_post_send,
 172         .query_device = pvrdma_query_device,
 173         .query_gid = pvrdma_query_gid,
 174         .query_pkey = pvrdma_query_pkey,
 175         .query_port = pvrdma_query_port,
 176         .query_qp = pvrdma_query_qp,
 177         .reg_user_mr = pvrdma_reg_user_mr,
 178         .req_notify_cq = pvrdma_req_notify_cq,
 179
 180         INIT_RDMA_OBJ_SIZE(ib_ah, pvrdma_ah, ibah),
 181         INIT_RDMA_OBJ_SIZE(ib_pd, pvrdma_pd, ibpd),
 182         INIT_RDMA_OBJ_SIZE(ib_ucontext, pvrdma_ucontext, ibucontext),
 183 };
 184
 185 static const struct ib_device_ops pvrdma_dev_srq_ops = {
 186         .create_srq = pvrdma_create_srq,
 187         .destroy_srq = pvrdma_destroy_srq,
 188         .modify_srq = pvrdma_modify_srq,
 189         .query_srq = pvrdma_query_srq,
 190
 191         INIT_RDMA_OBJ_SIZE(ib_srq, pvrdma_srq, ibsrq),
 192 };
 193
 194 static int pvrdma_register_device(struct pvrdma_dev *dev)
 195 {
 196         int ret = -1;
 197
 198         dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
 199         dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
 200         dev->flags = 0;
 201         dev->ib_dev.owner = THIS_MODULE;
 202         dev->ib_dev.num_comp_vectors = 1;
 203         dev->ib_dev.dev.parent = &dev->pdev->dev;
 204         dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION;
 205         dev->ib_dev.uverbs_cmd_mask =
 206                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 207                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 208                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 209                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 210                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 211                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 212                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 213                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 214                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 215                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 216                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 217                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 218                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 219                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 220                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 221                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 222                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 223                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 224                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 225                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 226
 227         dev->ib_dev.node_type = RDMA_NODE_IB_CA;
 228         dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
 229
 230         ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_ops);
 231
 232         mutex_init(&dev->port_mutex);
 233         spin_lock_init(&dev->desc_lock);
 234
 235         dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *),
 236                               GFP_KERNEL);
 237         if (!dev->cq_tbl)
 238                 return ret;
 239         spin_lock_init(&dev->cq_tbl_lock);
 240
 241         dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *),
 242                               GFP_KERNEL);
 243         if (!dev->qp_tbl)
 244                 goto err_cq_free;
 245         spin_lock_init(&dev->qp_tbl_lock);
 246
 247         /* Check if SRQ is supported by backend */
 248         if (dev->dsr->caps.max_srq) {
 249                 dev->ib_dev.uverbs_cmd_mask |=
 250                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)  |
 251                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)  |
 252                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)   |
 253                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
 254                         (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
 255
 256                 ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_srq_ops);
 257
 258                 dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
 259                                        sizeof(struct pvrdma_srq *),
 260                                        GFP_KERNEL);
 261                 if (!dev->srq_tbl)
 262                         goto err_qp_free;
 263         }
 264         dev->ib_dev.driver_id = RDMA_DRIVER_VMW_PVRDMA;
 265         ret = ib_device_set_netdev(&dev->ib_dev, dev->netdev, 1);
 266         if (ret)
 267                 return ret;
 268         spin_lock_init(&dev->srq_tbl_lock);
 269         rdma_set_device_sysfs_group(&dev->ib_dev, &pvrdma_attr_group);
 270
 271         ret = ib_register_device(&dev->ib_dev, "vmw_pvrdma%d");
 272         if (ret)
 273                 goto err_srq_free;
 274
 275         dev->ib_active = true;
 276
 277         return 0;
 278
 279 err_srq_free:
 280         kfree(dev->srq_tbl);
 281 err_qp_free:
 282         kfree(dev->qp_tbl);
 283 err_cq_free:
 284         kfree(dev->cq_tbl);
 285
 286         return ret;
 287 }
 288
 289 static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
 290 {
 291         u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
 292         struct pvrdma_dev *dev = dev_id;
 293
 294         dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
 295
 296         if (!dev->pdev->msix_enabled) {
 297                 /* Legacy intr */
 298                 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
 299                 if (icr == 0)
 300                         return IRQ_NONE;
 301         }
 302
 303         if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
 304                 complete(&dev->cmd_done);
 305
 306         return IRQ_HANDLED;
 307 }
 308
 309 static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
 310 {
 311         struct pvrdma_qp *qp;
 312         unsigned long flags;
 313
 314         spin_lock_irqsave(&dev->qp_tbl_lock, flags);
 315         qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
 316         if (qp)
 317                 refcount_inc(&qp->refcnt);
 318         spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
 319
 320         if (qp && qp->ibqp.event_handler) {
 321                 struct ib_qp *ibqp = &qp->ibqp;
 322                 struct ib_event e;
 323
 324                 e.device = ibqp->device;
 325                 e.element.qp = ibqp;
 326                 e.event = type; /* 1:1 mapping for now. */
 327                 ibqp->event_handler(&e, ibqp->qp_context);
 328         }
 329         if (qp) {
 330                 if (refcount_dec_and_test(&qp->refcnt))
 331                         complete(&qp->free);
 332         }
 333 }
 334
 335 static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
 336 {
 337         struct pvrdma_cq *cq;
 338         unsigned long flags;
 339
 340         spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 341         cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
 342         if (cq)
 343                 refcount_inc(&cq->refcnt);
 344         spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 345
 346         if (cq && cq->ibcq.event_handler) {
 347                 struct ib_cq *ibcq = &cq->ibcq;
 348                 struct ib_event e;
 349
 350                 e.device = ibcq->device;
 351                 e.element.cq = ibcq;
 352                 e.event = type; /* 1:1 mapping for now. */
 353                 ibcq->event_handler(&e, ibcq->cq_context);
 354         }
 355         if (cq) {
 356                 if (refcount_dec_and_test(&cq->refcnt))
 357                         complete(&cq->free);
 358         }
 359 }
 360
 361 static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
 362 {
 363         struct pvrdma_srq *srq;
 364         unsigned long flags;
 365
 366         spin_lock_irqsave(&dev->srq_tbl_lock, flags);
 367         if (dev->srq_tbl)
 368                 srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
 369         else
 370                 srq = NULL;
 371         if (srq)
 372                 refcount_inc(&srq->refcnt);
 373         spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
 374
 375         if (srq && srq->ibsrq.event_handler) {
 376                 struct ib_srq *ibsrq = &srq->ibsrq;
 377                 struct ib_event e;
 378
 379                 e.device = ibsrq->device;
 380                 e.element.srq = ibsrq;
 381                 e.event = type; /* 1:1 mapping for now. */
 382                 ibsrq->event_handler(&e, ibsrq->srq_context);
 383         }
 384         if (srq) {
 385                 if (refcount_dec_and_test(&srq->refcnt))
 386                         complete(&srq->free);
 387         }
 388 }
 389
 390 static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
 391                                   enum ib_event_type event)
 392 {
 393         struct ib_event ib_event;
 394
 395         memset(&ib_event, 0, sizeof(ib_event));
 396         ib_event.device = &dev->ib_dev;
 397         ib_event.element.port_num = port;
 398         ib_event.event = event;
 399         ib_dispatch_event(&ib_event);
 400 }
 401
 402 static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
 403 {
 404         if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
 405                 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
 406                 return;
 407         }
 408
 409         pvrdma_dispatch_event(dev, port, type);
 410 }
 411
 412 static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
 413 {
 414         return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
 415                                         &dev->async_pdir,
 416                                         PAGE_SIZE +
 417                                         sizeof(struct pvrdma_eqe) * i);
 418 }
 419
 420 static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
 421 {
 422         struct pvrdma_dev *dev = dev_id;
 423         struct pvrdma_ring *ring = &dev->async_ring_state->rx;
 424         int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
 425                          PAGE_SIZE / sizeof(struct pvrdma_eqe);
 426         unsigned int head;
 427
 428         dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
 429
 430         /*
 431          * Don't process events until the IB device is registered. Otherwise
 432          * we'll try to ib_dispatch_event() on an invalid device.
 433          */
 434         if (!dev->ib_active)
 435                 return IRQ_HANDLED;
 436
 437         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 438                 struct pvrdma_eqe *eqe;
 439
 440                 eqe = get_eqe(dev, head);
 441
 442                 switch (eqe->type) {
 443                 case PVRDMA_EVENT_QP_FATAL:
 444                 case PVRDMA_EVENT_QP_REQ_ERR:
 445                 case PVRDMA_EVENT_QP_ACCESS_ERR:
 446                 case PVRDMA_EVENT_COMM_EST:
 447                 case PVRDMA_EVENT_SQ_DRAINED:
 448                 case PVRDMA_EVENT_PATH_MIG:
 449                 case PVRDMA_EVENT_PATH_MIG_ERR:
 450                 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
 451                         pvrdma_qp_event(dev, eqe->info, eqe->type);
 452                         break;
 453
 454                 case PVRDMA_EVENT_CQ_ERR:
 455                         pvrdma_cq_event(dev, eqe->info, eqe->type);
 456                         break;
 457
 458                 case PVRDMA_EVENT_SRQ_ERR:
 459                 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
 460                         pvrdma_srq_event(dev, eqe->info, eqe->type);
 461                         break;
 462
 463                 case PVRDMA_EVENT_PORT_ACTIVE:
 464                 case PVRDMA_EVENT_PORT_ERR:
 465                 case PVRDMA_EVENT_LID_CHANGE:
 466                 case PVRDMA_EVENT_PKEY_CHANGE:
 467                 case PVRDMA_EVENT_SM_CHANGE:
 468                 case PVRDMA_EVENT_CLIENT_REREGISTER:
 469                 case PVRDMA_EVENT_GID_CHANGE:
 470                         pvrdma_dev_event(dev, eqe->info, eqe->type);
 471                         break;
 472
 473                 case PVRDMA_EVENT_DEVICE_FATAL:
 474                         pvrdma_dev_event(dev, 1, eqe->type);
 475                         break;
 476
 477                 default:
 478                         break;
 479                 }
 480
 481                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 482         }
 483
 484         return IRQ_HANDLED;
 485 }
 486
 487 static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
 488                                            unsigned int i)
 489 {
 490         return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
 491                                         &dev->cq_pdir,
 492                                         PAGE_SIZE +
 493                                         sizeof(struct pvrdma_cqne) * i);
 494 }
 495
 496 static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
 497 {
 498         struct pvrdma_dev *dev = dev_id;
 499         struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
 500         int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
 501                          sizeof(struct pvrdma_cqne);
 502         unsigned int head;
 503         unsigned long flags;
 504
 505         dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
 506
 507         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 508                 struct pvrdma_cqne *cqne;
 509                 struct pvrdma_cq *cq;
 510
 511                 cqne = get_cqne(dev, head);
 512                 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 513                 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
 514                 if (cq)
 515                         refcount_inc(&cq->refcnt);
 516                 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 517
 518                 if (cq && cq->ibcq.comp_handler)
 519                         cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
 520                 if (cq) {
 521                         if (refcount_dec_and_test(&cq->refcnt))
 522                                 complete(&cq->free);
 523                 }
 524                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 525         }
 526
 527         return IRQ_HANDLED;
 528 }
 529
 530 static void pvrdma_free_irq(struct pvrdma_dev *dev)
 531 {
 532         int i;
 533
 534         dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
 535         for (i = 0; i < dev->nr_vectors; i++)
 536                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 537 }
 538
 539 static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
 540 {
 541         dev_dbg(&dev->pdev->dev, "enable interrupts\n");
 542         pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
 543 }
 544
 545 static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
 546 {
 547         dev_dbg(&dev->pdev->dev, "disable interrupts\n");
 548         pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
 549 }
 550
 551 static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
 552 {
 553         struct pci_dev *pdev = dev->pdev;
 554         int ret = 0, i;
 555
 556         ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
 557                         PCI_IRQ_MSIX);
 558         if (ret < 0) {
 559                 ret = pci_alloc_irq_vectors(pdev, 1, 1,
 560                                 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
 561                 if (ret < 0)
 562                         return ret;
 563         }
 564         dev->nr_vectors = ret;
 565
 566         ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
 567                         pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
 568         if (ret) {
 569                 dev_err(&dev->pdev->dev,
 570                         "failed to request interrupt 0\n");
 571                 goto out_free_vectors;
 572         }
 573
 574         for (i = 1; i < dev->nr_vectors; i++) {
 575                 ret = request_irq(pci_irq_vector(dev->pdev, i),
 576                                 i == 1 ? pvrdma_intr1_handler :
 577                                          pvrdma_intrx_handler,
 578                                 0, DRV_NAME, dev);
 579                 if (ret) {
 580                         dev_err(&dev->pdev->dev,
 581                                 "failed to request interrupt %d\n", i);
 582                         goto free_irqs;
 583                 }
 584         }
 585
 586         return 0;
 587
 588 free_irqs:
 589         while (--i >= 0)
 590                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 591 out_free_vectors:
 592         pci_free_irq_vectors(pdev);
 593         return ret;
 594 }
 595
 596 static void pvrdma_free_slots(struct pvrdma_dev *dev)
 597 {
 598         struct pci_dev *pdev = dev->pdev;
 599
 600         if (dev->resp_slot)
 601                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
 602                                   dev->dsr->resp_slot_dma);
 603         if (dev->cmd_slot)
 604                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
 605                                   dev->dsr->cmd_slot_dma);
 606 }
 607
 608 static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
 609                                    const union ib_gid *gid,
 610                                    u8 gid_type,
 611                                    int index)
 612 {
 613         int ret;
 614         union pvrdma_cmd_req req;
 615         struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
 616
 617         if (!dev->sgid_tbl) {
 618                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 619                 return -EINVAL;
 620         }
 621
 622         memset(cmd_bind, 0, sizeof(*cmd_bind));
 623         cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
 624         memcpy(cmd_bind->new_gid, gid->raw, 16);
 625         cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
 626         cmd_bind->vlan = 0xfff;
 627         cmd_bind->index = index;
 628         cmd_bind->gid_type = gid_type;
 629
 630         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 631         if (ret < 0) {
 632                 dev_warn(&dev->pdev->dev,
 633                          "could not create binding, error: %d\n", ret);
 634                 return -EFAULT;
 635         }
 636         memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
 637         return 0;
 638 }
 639
 640 static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context)
 641 {
 642         struct pvrdma_dev *dev = to_vdev(attr->device);
 643
 644         return pvrdma_add_gid_at_index(dev, &attr->gid,
 645                                        ib_gid_type_to_pvrdma(attr->gid_type),
 646                                        attr->index);
 647 }
 648
 649 static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
 650 {
 651         int ret;
 652         union pvrdma_cmd_req req;
 653         struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
 654
 655         /* Update sgid table. */
 656         if (!dev->sgid_tbl) {
 657                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 658                 return -EINVAL;
 659         }
 660
 661         memset(cmd_dest, 0, sizeof(*cmd_dest));
 662         cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
 663         memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
 664         cmd_dest->index = index;
 665
 666         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 667         if (ret < 0) {
 668                 dev_warn(&dev->pdev->dev,
 669                          "could not destroy binding, error: %d\n", ret);
 670                 return ret;
 671         }
 672         memset(&dev->sgid_tbl[index], 0, 16);
 673         return 0;
 674 }
 675
 676 static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context)
 677 {
 678         struct pvrdma_dev *dev = to_vdev(attr->device);
 679
 680         dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
 681                 attr->index, dev->netdev->name);
 682
 683         return pvrdma_del_gid_at_index(dev, attr->index);
 684 }
 685
 686 static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 687                                           struct net_device *ndev,
 688                                           unsigned long event)
 689 {
 690         struct pci_dev *pdev_net;
 691         unsigned int slot;
 692
 693         switch (event) {
 694         case NETDEV_REBOOT:
 695         case NETDEV_DOWN:
 696                 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 697                 break;
 698         case NETDEV_UP:
 699                 pvrdma_write_reg(dev, PVRDMA_REG_CTL,
 700                                  PVRDMA_DEVICE_CTL_UNQUIESCE);
 701
 702                 mb();
 703
 704                 if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
 705                         dev_err(&dev->pdev->dev,
 706                                 "failed to activate device during link up\n");
 707                 else
 708                         pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 709                 break;
 710         case NETDEV_UNREGISTER:
 711                 ib_device_set_netdev(&dev->ib_dev, NULL, 1);
 712                 dev_put(dev->netdev);
 713                 dev->netdev = NULL;
 714                 break;
 715         case NETDEV_REGISTER:
 716                 /* vmxnet3 will have same bus, slot. But func will be 0 */
 717                 slot = PCI_SLOT(dev->pdev->devfn);
 718                 pdev_net = pci_get_slot(dev->pdev->bus,
 719                                         PCI_DEVFN(slot, 0));
 720                 if ((dev->netdev == NULL) &&
 721                     (pci_get_drvdata(pdev_net) == ndev)) {
 722                         /* this is our netdev */
 723                         ib_device_set_netdev(&dev->ib_dev, ndev, 1);
 724                         dev->netdev = ndev;
 725                         dev_hold(ndev);
 726                 }
 727                 pci_dev_put(pdev_net);
 728                 break;
 729
 730         default:
 731                 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
 732                         event, dev_name(&dev->ib_dev.dev));
 733                 break;
 734         }
 735 }
 736
 737 static void pvrdma_netdevice_event_work(struct work_struct *work)
 738 {
 739         struct pvrdma_netdevice_work *netdev_work;
 740         struct pvrdma_dev *dev;
 741
 742         netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
 743
 744         mutex_lock(&pvrdma_device_list_lock);
 745         list_for_each_entry(dev, &pvrdma_device_list, device_link) {
 746                 if ((netdev_work->event == NETDEV_REGISTER) ||
 747                     (dev->netdev == netdev_work->event_netdev)) {
 748                         pvrdma_netdevice_event_handle(dev,
 749                                                       netdev_work->event_netdev,
 750                                                       netdev_work->event);
 751                         break;
 752                 }
 753         }
 754         mutex_unlock(&pvrdma_device_list_lock);
 755
 756         kfree(netdev_work);
 757 }
 758
 759 static int pvrdma_netdevice_event(struct notifier_block *this,
 760                                   unsigned long event, void *ptr)
 761 {
 762         struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
 763         struct pvrdma_netdevice_work *netdev_work;
 764
 765         netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
 766         if (!netdev_work)
 767                 return NOTIFY_BAD;
 768
 769         INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
 770         netdev_work->event_netdev = event_netdev;
 771         netdev_work->event = event;
 772         queue_work(event_wq, &netdev_work->work);
 773
 774         return NOTIFY_DONE;
 775 }
 776
 777 static int pvrdma_pci_probe(struct pci_dev *pdev,
 778                             const struct pci_device_id *id)
 779 {
 780         struct pci_dev *pdev_net;
 781         struct pvrdma_dev *dev;
 782         int ret;
 783         unsigned long start;
 784         unsigned long len;
 785         dma_addr_t slot_dma = 0;
 786
 787         dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
 788
 789         /* Allocate zero-out device */
 790         dev = ib_alloc_device(pvrdma_dev, ib_dev);
 791         if (!dev) {
 792                 dev_err(&pdev->dev, "failed to allocate IB device\n");
 793                 return -ENOMEM;
 794         }
 795
 796         mutex_lock(&pvrdma_device_list_lock);
 797         list_add(&dev->device_link, &pvrdma_device_list);
 798         mutex_unlock(&pvrdma_device_list_lock);
 799
 800         ret = pvrdma_init_device(dev);
 801         if (ret)
 802                 goto err_free_device;
 803
 804         dev->pdev = pdev;
 805         pci_set_drvdata(pdev, dev);
 806
 807         ret = pci_enable_device(pdev);
 808         if (ret) {
 809                 dev_err(&pdev->dev, "cannot enable PCI device\n");
 810                 goto err_free_device;
 811         }
 812
 813         dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
 814                 pci_resource_flags(pdev, 0));
 815         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 816                 (unsigned long long)pci_resource_len(pdev, 0));
 817         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 818                 (unsigned long long)pci_resource_start(pdev, 0));
 819         dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
 820                 pci_resource_flags(pdev, 1));
 821         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 822                 (unsigned long long)pci_resource_len(pdev, 1));
 823         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 824                 (unsigned long long)pci_resource_start(pdev, 1));
 825
 826         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
 827             !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 828                 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
 829                 ret = -ENOMEM;
 830                 goto err_free_device;
 831         }
 832
 833         ret = pci_request_regions(pdev, DRV_NAME);
 834         if (ret) {
 835                 dev_err(&pdev->dev, "cannot request PCI resources\n");
 836                 goto err_disable_pdev;
 837         }
 838
 839         /* Enable 64-Bit DMA */
 840         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
 841                 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 842                 if (ret != 0) {
 843                         dev_err(&pdev->dev,
 844                                 "pci_set_consistent_dma_mask failed\n");
 845                         goto err_free_resource;
 846                 }
 847         } else {
 848                 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 849                 if (ret != 0) {
 850                         dev_err(&pdev->dev,
 851                                 "pci_set_dma_mask failed\n");
 852                         goto err_free_resource;
 853                 }
 854         }
 855
 856         pci_set_master(pdev);
 857
 858         /* Map register space */
 859         start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 860         len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 861         dev->regs = ioremap(start, len);
 862         if (!dev->regs) {
 863                 dev_err(&pdev->dev, "register mapping failed\n");
 864                 ret = -ENOMEM;
 865                 goto err_free_resource;
 866         }
 867
 868         /* Setup per-device UAR. */
 869         dev->driver_uar.index = 0;
 870         dev->driver_uar.pfn =
 871                 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
 872                 PAGE_SHIFT;
 873         dev->driver_uar.map =
 874                 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 875         if (!dev->driver_uar.map) {
 876                 dev_err(&pdev->dev, "failed to remap UAR pages\n");
 877                 ret = -ENOMEM;
 878                 goto err_unmap_regs;
 879         }
 880
 881         dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
 882         dev_info(&pdev->dev, "device version %d, driver version %d\n",
 883                  dev->dsr_version, PVRDMA_VERSION);
 884
 885         dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
 886                                       &dev->dsrbase, GFP_KERNEL);
 887         if (!dev->dsr) {
 888                 dev_err(&pdev->dev, "failed to allocate shared region\n");
 889                 ret = -ENOMEM;
 890                 goto err_uar_unmap;
 891         }
 892
 893         /* Setup the shared region */
 894         dev->dsr->driver_version = PVRDMA_VERSION;
 895         dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 896                 PVRDMA_GOS_BITS_32 :
 897                 PVRDMA_GOS_BITS_64;
 898         dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
 899         dev->dsr->gos_info.gos_ver = 1;
 900
 901         if (dev->dsr_version < PVRDMA_PPN64_VERSION)
 902                 dev->dsr->uar_pfn = dev->driver_uar.pfn;
 903         else
 904                 dev->dsr->uar_pfn64 = dev->driver_uar.pfn;
 905
 906         /* Command slot. */
 907         dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 908                                            &slot_dma, GFP_KERNEL);
 909         if (!dev->cmd_slot) {
 910                 ret = -ENOMEM;
 911                 goto err_free_dsr;
 912         }
 913
 914         dev->dsr->cmd_slot_dma = (u64)slot_dma;
 915
 916         /* Response slot. */
 917         dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 918                                             &slot_dma, GFP_KERNEL);
 919         if (!dev->resp_slot) {
 920                 ret = -ENOMEM;
 921                 goto err_free_slots;
 922         }
 923
 924         dev->dsr->resp_slot_dma = (u64)slot_dma;
 925
 926         /* Async event ring */
 927         dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 928         ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
 929                                    dev->dsr->async_ring_pages.num_pages, true);
 930         if (ret)
 931                 goto err_free_slots;
 932         dev->async_ring_state = dev->async_pdir.pages[0];
 933         dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
 934
 935         /* CQ notification ring */
 936         dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 937         ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
 938                                    dev->dsr->cq_ring_pages.num_pages, true);
 939         if (ret)
 940                 goto err_free_async_ring;
 941         dev->cq_ring_state = dev->cq_pdir.pages[0];
 942         dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
 943
 944         /*
 945          * Write the PA of the shared region to the device. The writes must be
 946          * ordered such that the high bits are written last. When the writes
 947          * complete, the device will have filled out the capabilities.
 948          */
 949
 950         pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
 951         pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
 952                          (u32)((u64)(dev->dsrbase) >> 32));
 953
 954         /* Make sure the write is complete before reading status. */
 955         mb();
 956
 957         /* The driver supports RoCE V1 and V2. */
 958         if (!PVRDMA_SUPPORTED(dev)) {
 959                 dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
 960                 ret = -EFAULT;
 961                 goto err_free_cq_ring;
 962         }
 963
 964         /* Paired vmxnet3 will have same bus, slot. But func will be 0 */
 965         pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
 966         if (!pdev_net) {
 967                 dev_err(&pdev->dev, "failed to find paired net device\n");
 968                 ret = -ENODEV;
 969                 goto err_free_cq_ring;
 970         }
 971
 972         if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
 973             pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
 974                 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
 975                 pci_dev_put(pdev_net);
 976                 ret = -ENODEV;
 977                 goto err_free_cq_ring;
 978         }
 979
 980         dev->netdev = pci_get_drvdata(pdev_net);
 981         pci_dev_put(pdev_net);
 982         if (!dev->netdev) {
 983                 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
 984                 ret = -ENODEV;
 985                 goto err_free_cq_ring;
 986         }
 987         dev_hold(dev->netdev);
 988
 989         dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
 990
 991         /* Interrupt setup */
 992         ret = pvrdma_alloc_intrs(dev);
 993         if (ret) {
 994                 dev_err(&pdev->dev, "failed to allocate interrupts\n");
 995                 ret = -ENOMEM;
 996                 goto err_free_cq_ring;
 997         }
 998
 999         /* Allocate UAR table. */
1000         ret = pvrdma_uar_table_init(dev);
1001         if (ret) {
1002                 dev_err(&pdev->dev, "failed to allocate UAR table\n");
1003                 ret = -ENOMEM;
1004                 goto err_free_intrs;
1005         }
1006
1007         /* Allocate GID table */
1008         dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
1009                                 sizeof(union ib_gid), GFP_KERNEL);
1010         if (!dev->sgid_tbl) {
1011                 ret = -ENOMEM;
1012                 goto err_free_uar_table;
1013         }
1014         dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
1015
1016         pvrdma_enable_intrs(dev);
1017
1018         /* Activate pvrdma device */
1019         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
1020
1021         /* Make sure the write is complete before reading status. */
1022         mb();
1023
1024         /* Check if device was successfully activated */
1025         ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
1026         if (ret != 0) {
1027                 dev_err(&pdev->dev, "failed to activate device\n");
1028                 ret = -EFAULT;
1029                 goto err_disable_intr;
1030         }
1031
1032         /* Register IB device */
1033         ret = pvrdma_register_device(dev);
1034         if (ret) {
1035                 dev_err(&pdev->dev, "failed to register IB device\n");
1036                 goto err_disable_intr;
1037         }
1038
1039         dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1040         ret = register_netdevice_notifier(&dev->nb_netdev);
1041         if (ret) {
1042                 dev_err(&pdev->dev, "failed to register netdevice events\n");
1043                 goto err_unreg_ibdev;
1044         }
1045
1046         dev_info(&pdev->dev, "attached to device\n");
1047         return 0;
1048
1049 err_unreg_ibdev:
1050         ib_unregister_device(&dev->ib_dev);
1051 err_disable_intr:
1052         pvrdma_disable_intrs(dev);
1053         kfree(dev->sgid_tbl);
1054 err_free_uar_table:
1055         pvrdma_uar_table_cleanup(dev);
1056 err_free_intrs:
1057         pvrdma_free_irq(dev);
1058         pci_free_irq_vectors(pdev);
1059 err_free_cq_ring:
1060         if (dev->netdev) {
1061                 dev_put(dev->netdev);
1062                 dev->netdev = NULL;
1063         }
1064         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1065 err_free_async_ring:
1066         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1067 err_free_slots:
1068         pvrdma_free_slots(dev);
1069 err_free_dsr:
1070         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1071                           dev->dsrbase);
1072 err_uar_unmap:
1073         iounmap(dev->driver_uar.map);
1074 err_unmap_regs:
1075         iounmap(dev->regs);
1076 err_free_resource:
1077         pci_release_regions(pdev);
1078 err_disable_pdev:
1079         pci_disable_device(pdev);
1080         pci_set_drvdata(pdev, NULL);
1081 err_free_device:
1082         mutex_lock(&pvrdma_device_list_lock);
1083         list_del(&dev->device_link);
1084         mutex_unlock(&pvrdma_device_list_lock);
1085         ib_dealloc_device(&dev->ib_dev);
1086         return ret;
1087 }
1088
1089 static void pvrdma_pci_remove(struct pci_dev *pdev)
1090 {
1091         struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1092
1093         if (!dev)
1094                 return;
1095
1096         dev_info(&pdev->dev, "detaching from device\n");
1097
1098         unregister_netdevice_notifier(&dev->nb_netdev);
1099         dev->nb_netdev.notifier_call = NULL;
1100
1101         flush_workqueue(event_wq);
1102
1103         if (dev->netdev) {
1104                 dev_put(dev->netdev);
1105                 dev->netdev = NULL;
1106         }
1107
1108         /* Unregister ib device */
1109         ib_unregister_device(&dev->ib_dev);
1110
1111         mutex_lock(&pvrdma_device_list_lock);
1112         list_del(&dev->device_link);
1113         mutex_unlock(&pvrdma_device_list_lock);
1114
1115         pvrdma_disable_intrs(dev);
1116         pvrdma_free_irq(dev);
1117         pci_free_irq_vectors(pdev);
1118
1119         /* Deactivate pvrdma device */
1120         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1121         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1122         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1123         pvrdma_free_slots(dev);
1124         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1125                           dev->dsrbase);
1126
1127         iounmap(dev->regs);
1128         kfree(dev->sgid_tbl);
1129         kfree(dev->cq_tbl);
1130         kfree(dev->srq_tbl);
1131         kfree(dev->qp_tbl);
1132         pvrdma_uar_table_cleanup(dev);
1133         iounmap(dev->driver_uar.map);
1134
1135         ib_dealloc_device(&dev->ib_dev);
1136
1137         /* Free pci resources */
1138         pci_release_regions(pdev);
1139         pci_disable_device(pdev);
1140         pci_set_drvdata(pdev, NULL);
1141 }
1142
1143 static const struct pci_device_id pvrdma_pci_table[] = {
1144         { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1145         { 0 },
1146 };
1147
1148 MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1149
1150 static struct pci_driver pvrdma_driver = {
1151         .name           = DRV_NAME,
1152         .id_table       = pvrdma_pci_table,
1153         .probe          = pvrdma_pci_probe,
1154         .remove         = pvrdma_pci_remove,
1155 };
1156
1157 static int __init pvrdma_init(void)
1158 {
1159         int err;
1160
1161         event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1162         if (!event_wq)
1163                 return -ENOMEM;
1164
1165         err = pci_register_driver(&pvrdma_driver);
1166         if (err)
1167                 destroy_workqueue(event_wq);
1168
1169         return err;
1170 }
1171
1172 static void __exit pvrdma_cleanup(void)
1173 {
1174         pci_unregister_driver(&pvrdma_driver);
1175
1176         destroy_workqueue(event_wq);
1177 }
1178
1179 module_init(pvrdma_init);
1180 module_exit(pvrdma_cleanup);
1181
1182 MODULE_AUTHOR("VMware, Inc");
1183 MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1184 MODULE_LICENSE("Dual BSD/GPL");