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 struct net_device *pvrdma_get_netdev(struct ib_device *ibdev,
 147                                             u8 port_num)
 148 {
 149         struct net_device *netdev;
 150         struct pvrdma_dev *dev = to_vdev(ibdev);
 151
 152         if (port_num != 1)
 153                 return NULL;
 154
 155         rcu_read_lock();
 156         netdev = dev->netdev;
 157         if (netdev)
 158                 dev_hold(netdev);
 159         rcu_read_unlock();
 160
 161         return netdev;
 162 }
 163
 164 static const struct ib_device_ops pvrdma_dev_ops = {
 165         .add_gid = pvrdma_add_gid,
 166         .alloc_mr = pvrdma_alloc_mr,
 167         .alloc_pd = pvrdma_alloc_pd,
 168         .alloc_ucontext = pvrdma_alloc_ucontext,
 169         .create_ah = pvrdma_create_ah,
 170         .create_cq = pvrdma_create_cq,
 171         .create_qp = pvrdma_create_qp,
 172         .dealloc_pd = pvrdma_dealloc_pd,
 173         .dealloc_ucontext = pvrdma_dealloc_ucontext,
 174         .del_gid = pvrdma_del_gid,
 175         .dereg_mr = pvrdma_dereg_mr,
 176         .destroy_ah = pvrdma_destroy_ah,
 177         .destroy_cq = pvrdma_destroy_cq,
 178         .destroy_qp = pvrdma_destroy_qp,
 179         .get_dev_fw_str = pvrdma_get_fw_ver_str,
 180         .get_dma_mr = pvrdma_get_dma_mr,
 181         .get_link_layer = pvrdma_port_link_layer,
 182         .get_netdev = pvrdma_get_netdev,
 183         .get_port_immutable = pvrdma_port_immutable,
 184         .map_mr_sg = pvrdma_map_mr_sg,
 185         .mmap = pvrdma_mmap,
 186         .modify_port = pvrdma_modify_port,
 187         .modify_qp = pvrdma_modify_qp,
 188         .poll_cq = pvrdma_poll_cq,
 189         .post_recv = pvrdma_post_recv,
 190         .post_send = pvrdma_post_send,
 191         .query_device = pvrdma_query_device,
 192         .query_gid = pvrdma_query_gid,
 193         .query_pkey = pvrdma_query_pkey,
 194         .query_port = pvrdma_query_port,
 195         .query_qp = pvrdma_query_qp,
 196         .reg_user_mr = pvrdma_reg_user_mr,
 197         .req_notify_cq = pvrdma_req_notify_cq,
 198         INIT_RDMA_OBJ_SIZE(ib_pd, pvrdma_pd, ibpd),
 199         INIT_RDMA_OBJ_SIZE(ib_ucontext, pvrdma_ucontext, ibucontext),
 200 };
 201
 202 static const struct ib_device_ops pvrdma_dev_srq_ops = {
 203         .create_srq = pvrdma_create_srq,
 204         .destroy_srq = pvrdma_destroy_srq,
 205         .modify_srq = pvrdma_modify_srq,
 206         .query_srq = pvrdma_query_srq,
 207 };
 208
 209 static int pvrdma_register_device(struct pvrdma_dev *dev)
 210 {
 211         int ret = -1;
 212
 213         dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
 214         dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
 215         dev->flags = 0;
 216         dev->ib_dev.owner = THIS_MODULE;
 217         dev->ib_dev.num_comp_vectors = 1;
 218         dev->ib_dev.dev.parent = &dev->pdev->dev;
 219         dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION;
 220         dev->ib_dev.uverbs_cmd_mask =
 221                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 222                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 223                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 224                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 225                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 226                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 227                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 228                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 229                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 230                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 231                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 232                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 233                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 234                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 235                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 236                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 237                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 238                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 239                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 240                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 241
 242         dev->ib_dev.node_type = RDMA_NODE_IB_CA;
 243         dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
 244
 245         ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_ops);
 246
 247         mutex_init(&dev->port_mutex);
 248         spin_lock_init(&dev->desc_lock);
 249
 250         dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *),
 251                               GFP_KERNEL);
 252         if (!dev->cq_tbl)
 253                 return ret;
 254         spin_lock_init(&dev->cq_tbl_lock);
 255
 256         dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *),
 257                               GFP_KERNEL);
 258         if (!dev->qp_tbl)
 259                 goto err_cq_free;
 260         spin_lock_init(&dev->qp_tbl_lock);
 261
 262         /* Check if SRQ is supported by backend */
 263         if (dev->dsr->caps.max_srq) {
 264                 dev->ib_dev.uverbs_cmd_mask |=
 265                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)  |
 266                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)  |
 267                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)   |
 268                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
 269                         (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
 270
 271                 ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_srq_ops);
 272
 273                 dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
 274                                        sizeof(struct pvrdma_srq *),
 275                                        GFP_KERNEL);
 276                 if (!dev->srq_tbl)
 277                         goto err_qp_free;
 278         }
 279         dev->ib_dev.driver_id = RDMA_DRIVER_VMW_PVRDMA;
 280         spin_lock_init(&dev->srq_tbl_lock);
 281         rdma_set_device_sysfs_group(&dev->ib_dev, &pvrdma_attr_group);
 282
 283         ret = ib_register_device(&dev->ib_dev, "vmw_pvrdma%d");
 284         if (ret)
 285                 goto err_srq_free;
 286
 287         dev->ib_active = true;
 288
 289         return 0;
 290
 291 err_srq_free:
 292         kfree(dev->srq_tbl);
 293 err_qp_free:
 294         kfree(dev->qp_tbl);
 295 err_cq_free:
 296         kfree(dev->cq_tbl);
 297
 298         return ret;
 299 }
 300
 301 static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
 302 {
 303         u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
 304         struct pvrdma_dev *dev = dev_id;
 305
 306         dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
 307
 308         if (!dev->pdev->msix_enabled) {
 309                 /* Legacy intr */
 310                 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
 311                 if (icr == 0)
 312                         return IRQ_NONE;
 313         }
 314
 315         if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
 316                 complete(&dev->cmd_done);
 317
 318         return IRQ_HANDLED;
 319 }
 320
 321 static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
 322 {
 323         struct pvrdma_qp *qp;
 324         unsigned long flags;
 325
 326         spin_lock_irqsave(&dev->qp_tbl_lock, flags);
 327         qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
 328         if (qp)
 329                 refcount_inc(&qp->refcnt);
 330         spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
 331
 332         if (qp && qp->ibqp.event_handler) {
 333                 struct ib_qp *ibqp = &qp->ibqp;
 334                 struct ib_event e;
 335
 336                 e.device = ibqp->device;
 337                 e.element.qp = ibqp;
 338                 e.event = type; /* 1:1 mapping for now. */
 339                 ibqp->event_handler(&e, ibqp->qp_context);
 340         }
 341         if (qp) {
 342                 if (refcount_dec_and_test(&qp->refcnt))
 343                         complete(&qp->free);
 344         }
 345 }
 346
 347 static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
 348 {
 349         struct pvrdma_cq *cq;
 350         unsigned long flags;
 351
 352         spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 353         cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
 354         if (cq)
 355                 refcount_inc(&cq->refcnt);
 356         spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 357
 358         if (cq && cq->ibcq.event_handler) {
 359                 struct ib_cq *ibcq = &cq->ibcq;
 360                 struct ib_event e;
 361
 362                 e.device = ibcq->device;
 363                 e.element.cq = ibcq;
 364                 e.event = type; /* 1:1 mapping for now. */
 365                 ibcq->event_handler(&e, ibcq->cq_context);
 366         }
 367         if (cq) {
 368                 if (refcount_dec_and_test(&cq->refcnt))
 369                         complete(&cq->free);
 370         }
 371 }
 372
 373 static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
 374 {
 375         struct pvrdma_srq *srq;
 376         unsigned long flags;
 377
 378         spin_lock_irqsave(&dev->srq_tbl_lock, flags);
 379         if (dev->srq_tbl)
 380                 srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
 381         else
 382                 srq = NULL;
 383         if (srq)
 384                 refcount_inc(&srq->refcnt);
 385         spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
 386
 387         if (srq && srq->ibsrq.event_handler) {
 388                 struct ib_srq *ibsrq = &srq->ibsrq;
 389                 struct ib_event e;
 390
 391                 e.device = ibsrq->device;
 392                 e.element.srq = ibsrq;
 393                 e.event = type; /* 1:1 mapping for now. */
 394                 ibsrq->event_handler(&e, ibsrq->srq_context);
 395         }
 396         if (srq) {
 397                 if (refcount_dec_and_test(&srq->refcnt))
 398                         complete(&srq->free);
 399         }
 400 }
 401
 402 static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
 403                                   enum ib_event_type event)
 404 {
 405         struct ib_event ib_event;
 406
 407         memset(&ib_event, 0, sizeof(ib_event));
 408         ib_event.device = &dev->ib_dev;
 409         ib_event.element.port_num = port;
 410         ib_event.event = event;
 411         ib_dispatch_event(&ib_event);
 412 }
 413
 414 static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
 415 {
 416         if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
 417                 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
 418                 return;
 419         }
 420
 421         pvrdma_dispatch_event(dev, port, type);
 422 }
 423
 424 static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
 425 {
 426         return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
 427                                         &dev->async_pdir,
 428                                         PAGE_SIZE +
 429                                         sizeof(struct pvrdma_eqe) * i);
 430 }
 431
 432 static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
 433 {
 434         struct pvrdma_dev *dev = dev_id;
 435         struct pvrdma_ring *ring = &dev->async_ring_state->rx;
 436         int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
 437                          PAGE_SIZE / sizeof(struct pvrdma_eqe);
 438         unsigned int head;
 439
 440         dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
 441
 442         /*
 443          * Don't process events until the IB device is registered. Otherwise
 444          * we'll try to ib_dispatch_event() on an invalid device.
 445          */
 446         if (!dev->ib_active)
 447                 return IRQ_HANDLED;
 448
 449         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 450                 struct pvrdma_eqe *eqe;
 451
 452                 eqe = get_eqe(dev, head);
 453
 454                 switch (eqe->type) {
 455                 case PVRDMA_EVENT_QP_FATAL:
 456                 case PVRDMA_EVENT_QP_REQ_ERR:
 457                 case PVRDMA_EVENT_QP_ACCESS_ERR:
 458                 case PVRDMA_EVENT_COMM_EST:
 459                 case PVRDMA_EVENT_SQ_DRAINED:
 460                 case PVRDMA_EVENT_PATH_MIG:
 461                 case PVRDMA_EVENT_PATH_MIG_ERR:
 462                 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
 463                         pvrdma_qp_event(dev, eqe->info, eqe->type);
 464                         break;
 465
 466                 case PVRDMA_EVENT_CQ_ERR:
 467                         pvrdma_cq_event(dev, eqe->info, eqe->type);
 468                         break;
 469
 470                 case PVRDMA_EVENT_SRQ_ERR:
 471                 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
 472                         pvrdma_srq_event(dev, eqe->info, eqe->type);
 473                         break;
 474
 475                 case PVRDMA_EVENT_PORT_ACTIVE:
 476                 case PVRDMA_EVENT_PORT_ERR:
 477                 case PVRDMA_EVENT_LID_CHANGE:
 478                 case PVRDMA_EVENT_PKEY_CHANGE:
 479                 case PVRDMA_EVENT_SM_CHANGE:
 480                 case PVRDMA_EVENT_CLIENT_REREGISTER:
 481                 case PVRDMA_EVENT_GID_CHANGE:
 482                         pvrdma_dev_event(dev, eqe->info, eqe->type);
 483                         break;
 484
 485                 case PVRDMA_EVENT_DEVICE_FATAL:
 486                         pvrdma_dev_event(dev, 1, eqe->type);
 487                         break;
 488
 489                 default:
 490                         break;
 491                 }
 492
 493                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 494         }
 495
 496         return IRQ_HANDLED;
 497 }
 498
 499 static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
 500                                            unsigned int i)
 501 {
 502         return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
 503                                         &dev->cq_pdir,
 504                                         PAGE_SIZE +
 505                                         sizeof(struct pvrdma_cqne) * i);
 506 }
 507
 508 static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
 509 {
 510         struct pvrdma_dev *dev = dev_id;
 511         struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
 512         int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
 513                          sizeof(struct pvrdma_cqne);
 514         unsigned int head;
 515         unsigned long flags;
 516
 517         dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
 518
 519         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 520                 struct pvrdma_cqne *cqne;
 521                 struct pvrdma_cq *cq;
 522
 523                 cqne = get_cqne(dev, head);
 524                 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 525                 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
 526                 if (cq)
 527                         refcount_inc(&cq->refcnt);
 528                 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 529
 530                 if (cq && cq->ibcq.comp_handler)
 531                         cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
 532                 if (cq) {
 533                         if (refcount_dec_and_test(&cq->refcnt))
 534                                 complete(&cq->free);
 535                 }
 536                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 537         }
 538
 539         return IRQ_HANDLED;
 540 }
 541
 542 static void pvrdma_free_irq(struct pvrdma_dev *dev)
 543 {
 544         int i;
 545
 546         dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
 547         for (i = 0; i < dev->nr_vectors; i++)
 548                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 549 }
 550
 551 static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
 552 {
 553         dev_dbg(&dev->pdev->dev, "enable interrupts\n");
 554         pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
 555 }
 556
 557 static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
 558 {
 559         dev_dbg(&dev->pdev->dev, "disable interrupts\n");
 560         pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
 561 }
 562
 563 static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
 564 {
 565         struct pci_dev *pdev = dev->pdev;
 566         int ret = 0, i;
 567
 568         ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
 569                         PCI_IRQ_MSIX);
 570         if (ret < 0) {
 571                 ret = pci_alloc_irq_vectors(pdev, 1, 1,
 572                                 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
 573                 if (ret < 0)
 574                         return ret;
 575         }
 576         dev->nr_vectors = ret;
 577
 578         ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
 579                         pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
 580         if (ret) {
 581                 dev_err(&dev->pdev->dev,
 582                         "failed to request interrupt 0\n");
 583                 goto out_free_vectors;
 584         }
 585
 586         for (i = 1; i < dev->nr_vectors; i++) {
 587                 ret = request_irq(pci_irq_vector(dev->pdev, i),
 588                                 i == 1 ? pvrdma_intr1_handler :
 589                                          pvrdma_intrx_handler,
 590                                 0, DRV_NAME, dev);
 591                 if (ret) {
 592                         dev_err(&dev->pdev->dev,
 593                                 "failed to request interrupt %d\n", i);
 594                         goto free_irqs;
 595                 }
 596         }
 597
 598         return 0;
 599
 600 free_irqs:
 601         while (--i >= 0)
 602                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 603 out_free_vectors:
 604         pci_free_irq_vectors(pdev);
 605         return ret;
 606 }
 607
 608 static void pvrdma_free_slots(struct pvrdma_dev *dev)
 609 {
 610         struct pci_dev *pdev = dev->pdev;
 611
 612         if (dev->resp_slot)
 613                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
 614                                   dev->dsr->resp_slot_dma);
 615         if (dev->cmd_slot)
 616                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
 617                                   dev->dsr->cmd_slot_dma);
 618 }
 619
 620 static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
 621                                    const union ib_gid *gid,
 622                                    u8 gid_type,
 623                                    int index)
 624 {
 625         int ret;
 626         union pvrdma_cmd_req req;
 627         struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
 628
 629         if (!dev->sgid_tbl) {
 630                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 631                 return -EINVAL;
 632         }
 633
 634         memset(cmd_bind, 0, sizeof(*cmd_bind));
 635         cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
 636         memcpy(cmd_bind->new_gid, gid->raw, 16);
 637         cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
 638         cmd_bind->vlan = 0xfff;
 639         cmd_bind->index = index;
 640         cmd_bind->gid_type = gid_type;
 641
 642         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 643         if (ret < 0) {
 644                 dev_warn(&dev->pdev->dev,
 645                          "could not create binding, error: %d\n", ret);
 646                 return -EFAULT;
 647         }
 648         memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
 649         return 0;
 650 }
 651
 652 static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context)
 653 {
 654         struct pvrdma_dev *dev = to_vdev(attr->device);
 655
 656         return pvrdma_add_gid_at_index(dev, &attr->gid,
 657                                        ib_gid_type_to_pvrdma(attr->gid_type),
 658                                        attr->index);
 659 }
 660
 661 static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
 662 {
 663         int ret;
 664         union pvrdma_cmd_req req;
 665         struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
 666
 667         /* Update sgid table. */
 668         if (!dev->sgid_tbl) {
 669                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 670                 return -EINVAL;
 671         }
 672
 673         memset(cmd_dest, 0, sizeof(*cmd_dest));
 674         cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
 675         memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
 676         cmd_dest->index = index;
 677
 678         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 679         if (ret < 0) {
 680                 dev_warn(&dev->pdev->dev,
 681                          "could not destroy binding, error: %d\n", ret);
 682                 return ret;
 683         }
 684         memset(&dev->sgid_tbl[index], 0, 16);
 685         return 0;
 686 }
 687
 688 static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context)
 689 {
 690         struct pvrdma_dev *dev = to_vdev(attr->device);
 691
 692         dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
 693                 attr->index, dev->netdev->name);
 694
 695         return pvrdma_del_gid_at_index(dev, attr->index);
 696 }
 697
 698 static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 699                                           struct net_device *ndev,
 700                                           unsigned long event)
 701 {
 702         struct pci_dev *pdev_net;
 703         unsigned int slot;
 704
 705         switch (event) {
 706         case NETDEV_REBOOT:
 707         case NETDEV_DOWN:
 708                 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 709                 break;
 710         case NETDEV_UP:
 711                 pvrdma_write_reg(dev, PVRDMA_REG_CTL,
 712                                  PVRDMA_DEVICE_CTL_UNQUIESCE);
 713
 714                 mb();
 715
 716                 if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
 717                         dev_err(&dev->pdev->dev,
 718                                 "failed to activate device during link up\n");
 719                 else
 720                         pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 721                 break;
 722         case NETDEV_UNREGISTER:
 723                 dev_put(dev->netdev);
 724                 dev->netdev = NULL;
 725                 break;
 726         case NETDEV_REGISTER:
 727                 /* vmxnet3 will have same bus, slot. But func will be 0 */
 728                 slot = PCI_SLOT(dev->pdev->devfn);
 729                 pdev_net = pci_get_slot(dev->pdev->bus,
 730                                         PCI_DEVFN(slot, 0));
 731                 if ((dev->netdev == NULL) &&
 732                     (pci_get_drvdata(pdev_net) == ndev)) {
 733                         /* this is our netdev */
 734                         dev->netdev = ndev;
 735                         dev_hold(ndev);
 736                 }
 737                 pci_dev_put(pdev_net);
 738                 break;
 739
 740         default:
 741                 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
 742                         event, dev_name(&dev->ib_dev.dev));
 743                 break;
 744         }
 745 }
 746
 747 static void pvrdma_netdevice_event_work(struct work_struct *work)
 748 {
 749         struct pvrdma_netdevice_work *netdev_work;
 750         struct pvrdma_dev *dev;
 751
 752         netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
 753
 754         mutex_lock(&pvrdma_device_list_lock);
 755         list_for_each_entry(dev, &pvrdma_device_list, device_link) {
 756                 if ((netdev_work->event == NETDEV_REGISTER) ||
 757                     (dev->netdev == netdev_work->event_netdev)) {
 758                         pvrdma_netdevice_event_handle(dev,
 759                                                       netdev_work->event_netdev,
 760                                                       netdev_work->event);
 761                         break;
 762                 }
 763         }
 764         mutex_unlock(&pvrdma_device_list_lock);
 765
 766         kfree(netdev_work);
 767 }
 768
 769 static int pvrdma_netdevice_event(struct notifier_block *this,
 770                                   unsigned long event, void *ptr)
 771 {
 772         struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
 773         struct pvrdma_netdevice_work *netdev_work;
 774
 775         netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
 776         if (!netdev_work)
 777                 return NOTIFY_BAD;
 778
 779         INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
 780         netdev_work->event_netdev = event_netdev;
 781         netdev_work->event = event;
 782         queue_work(event_wq, &netdev_work->work);
 783
 784         return NOTIFY_DONE;
 785 }
 786
 787 static int pvrdma_pci_probe(struct pci_dev *pdev,
 788                             const struct pci_device_id *id)
 789 {
 790         struct pci_dev *pdev_net;
 791         struct pvrdma_dev *dev;
 792         int ret;
 793         unsigned long start;
 794         unsigned long len;
 795         dma_addr_t slot_dma = 0;
 796
 797         dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
 798
 799         /* Allocate zero-out device */
 800         dev = ib_alloc_device(pvrdma_dev, ib_dev);
 801         if (!dev) {
 802                 dev_err(&pdev->dev, "failed to allocate IB device\n");
 803                 return -ENOMEM;
 804         }
 805
 806         mutex_lock(&pvrdma_device_list_lock);
 807         list_add(&dev->device_link, &pvrdma_device_list);
 808         mutex_unlock(&pvrdma_device_list_lock);
 809
 810         ret = pvrdma_init_device(dev);
 811         if (ret)
 812                 goto err_free_device;
 813
 814         dev->pdev = pdev;
 815         pci_set_drvdata(pdev, dev);
 816
 817         ret = pci_enable_device(pdev);
 818         if (ret) {
 819                 dev_err(&pdev->dev, "cannot enable PCI device\n");
 820                 goto err_free_device;
 821         }
 822
 823         dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
 824                 pci_resource_flags(pdev, 0));
 825         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 826                 (unsigned long long)pci_resource_len(pdev, 0));
 827         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 828                 (unsigned long long)pci_resource_start(pdev, 0));
 829         dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
 830                 pci_resource_flags(pdev, 1));
 831         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 832                 (unsigned long long)pci_resource_len(pdev, 1));
 833         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 834                 (unsigned long long)pci_resource_start(pdev, 1));
 835
 836         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
 837             !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 838                 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
 839                 ret = -ENOMEM;
 840                 goto err_free_device;
 841         }
 842
 843         ret = pci_request_regions(pdev, DRV_NAME);
 844         if (ret) {
 845                 dev_err(&pdev->dev, "cannot request PCI resources\n");
 846                 goto err_disable_pdev;
 847         }
 848
 849         /* Enable 64-Bit DMA */
 850         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
 851                 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 852                 if (ret != 0) {
 853                         dev_err(&pdev->dev,
 854                                 "pci_set_consistent_dma_mask failed\n");
 855                         goto err_free_resource;
 856                 }
 857         } else {
 858                 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 859                 if (ret != 0) {
 860                         dev_err(&pdev->dev,
 861                                 "pci_set_dma_mask failed\n");
 862                         goto err_free_resource;
 863                 }
 864         }
 865
 866         pci_set_master(pdev);
 867
 868         /* Map register space */
 869         start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 870         len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 871         dev->regs = ioremap(start, len);
 872         if (!dev->regs) {
 873                 dev_err(&pdev->dev, "register mapping failed\n");
 874                 ret = -ENOMEM;
 875                 goto err_free_resource;
 876         }
 877
 878         /* Setup per-device UAR. */
 879         dev->driver_uar.index = 0;
 880         dev->driver_uar.pfn =
 881                 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
 882                 PAGE_SHIFT;
 883         dev->driver_uar.map =
 884                 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 885         if (!dev->driver_uar.map) {
 886                 dev_err(&pdev->dev, "failed to remap UAR pages\n");
 887                 ret = -ENOMEM;
 888                 goto err_unmap_regs;
 889         }
 890
 891         dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
 892         dev_info(&pdev->dev, "device version %d, driver version %d\n",
 893                  dev->dsr_version, PVRDMA_VERSION);
 894
 895         dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
 896                                       &dev->dsrbase, GFP_KERNEL);
 897         if (!dev->dsr) {
 898                 dev_err(&pdev->dev, "failed to allocate shared region\n");
 899                 ret = -ENOMEM;
 900                 goto err_uar_unmap;
 901         }
 902
 903         /* Setup the shared region */
 904         dev->dsr->driver_version = PVRDMA_VERSION;
 905         dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 906                 PVRDMA_GOS_BITS_32 :
 907                 PVRDMA_GOS_BITS_64;
 908         dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
 909         dev->dsr->gos_info.gos_ver = 1;
 910
 911         if (dev->dsr_version < PVRDMA_PPN64_VERSION)
 912                 dev->dsr->uar_pfn = dev->driver_uar.pfn;
 913         else
 914                 dev->dsr->uar_pfn64 = dev->driver_uar.pfn;
 915
 916         /* Command slot. */
 917         dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 918                                            &slot_dma, GFP_KERNEL);
 919         if (!dev->cmd_slot) {
 920                 ret = -ENOMEM;
 921                 goto err_free_dsr;
 922         }
 923
 924         dev->dsr->cmd_slot_dma = (u64)slot_dma;
 925
 926         /* Response slot. */
 927         dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 928                                             &slot_dma, GFP_KERNEL);
 929         if (!dev->resp_slot) {
 930                 ret = -ENOMEM;
 931                 goto err_free_slots;
 932         }
 933
 934         dev->dsr->resp_slot_dma = (u64)slot_dma;
 935
 936         /* Async event ring */
 937         dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 938         ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
 939                                    dev->dsr->async_ring_pages.num_pages, true);
 940         if (ret)
 941                 goto err_free_slots;
 942         dev->async_ring_state = dev->async_pdir.pages[0];
 943         dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
 944
 945         /* CQ notification ring */
 946         dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 947         ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
 948                                    dev->dsr->cq_ring_pages.num_pages, true);
 949         if (ret)
 950                 goto err_free_async_ring;
 951         dev->cq_ring_state = dev->cq_pdir.pages[0];
 952         dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
 953
 954         /*
 955          * Write the PA of the shared region to the device. The writes must be
 956          * ordered such that the high bits are written last. When the writes
 957          * complete, the device will have filled out the capabilities.
 958          */
 959
 960         pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
 961         pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
 962                          (u32)((u64)(dev->dsrbase) >> 32));
 963
 964         /* Make sure the write is complete before reading status. */
 965         mb();
 966
 967         /* The driver supports RoCE V1 and V2. */
 968         if (!PVRDMA_SUPPORTED(dev)) {
 969                 dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
 970                 ret = -EFAULT;
 971                 goto err_free_cq_ring;
 972         }
 973
 974         /* Paired vmxnet3 will have same bus, slot. But func will be 0 */
 975         pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
 976         if (!pdev_net) {
 977                 dev_err(&pdev->dev, "failed to find paired net device\n");
 978                 ret = -ENODEV;
 979                 goto err_free_cq_ring;
 980         }
 981
 982         if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
 983             pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
 984                 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
 985                 pci_dev_put(pdev_net);
 986                 ret = -ENODEV;
 987                 goto err_free_cq_ring;
 988         }
 989
 990         dev->netdev = pci_get_drvdata(pdev_net);
 991         pci_dev_put(pdev_net);
 992         if (!dev->netdev) {
 993                 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
 994                 ret = -ENODEV;
 995                 goto err_free_cq_ring;
 996         }
 997         dev_hold(dev->netdev);
 998
 999         dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
1000
1001         /* Interrupt setup */
1002         ret = pvrdma_alloc_intrs(dev);
1003         if (ret) {
1004                 dev_err(&pdev->dev, "failed to allocate interrupts\n");
1005                 ret = -ENOMEM;
1006                 goto err_free_cq_ring;
1007         }
1008
1009         /* Allocate UAR table. */
1010         ret = pvrdma_uar_table_init(dev);
1011         if (ret) {
1012                 dev_err(&pdev->dev, "failed to allocate UAR table\n");
1013                 ret = -ENOMEM;
1014                 goto err_free_intrs;
1015         }
1016
1017         /* Allocate GID table */
1018         dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
1019                                 sizeof(union ib_gid), GFP_KERNEL);
1020         if (!dev->sgid_tbl) {
1021                 ret = -ENOMEM;
1022                 goto err_free_uar_table;
1023         }
1024         dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
1025
1026         pvrdma_enable_intrs(dev);
1027
1028         /* Activate pvrdma device */
1029         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
1030
1031         /* Make sure the write is complete before reading status. */
1032         mb();
1033
1034         /* Check if device was successfully activated */
1035         ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
1036         if (ret != 0) {
1037                 dev_err(&pdev->dev, "failed to activate device\n");
1038                 ret = -EFAULT;
1039                 goto err_disable_intr;
1040         }
1041
1042         /* Register IB device */
1043         ret = pvrdma_register_device(dev);
1044         if (ret) {
1045                 dev_err(&pdev->dev, "failed to register IB device\n");
1046                 goto err_disable_intr;
1047         }
1048
1049         dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1050         ret = register_netdevice_notifier(&dev->nb_netdev);
1051         if (ret) {
1052                 dev_err(&pdev->dev, "failed to register netdevice events\n");
1053                 goto err_unreg_ibdev;
1054         }
1055
1056         dev_info(&pdev->dev, "attached to device\n");
1057         return 0;
1058
1059 err_unreg_ibdev:
1060         ib_unregister_device(&dev->ib_dev);
1061 err_disable_intr:
1062         pvrdma_disable_intrs(dev);
1063         kfree(dev->sgid_tbl);
1064 err_free_uar_table:
1065         pvrdma_uar_table_cleanup(dev);
1066 err_free_intrs:
1067         pvrdma_free_irq(dev);
1068         pci_free_irq_vectors(pdev);
1069 err_free_cq_ring:
1070         if (dev->netdev) {
1071                 dev_put(dev->netdev);
1072                 dev->netdev = NULL;
1073         }
1074         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1075 err_free_async_ring:
1076         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1077 err_free_slots:
1078         pvrdma_free_slots(dev);
1079 err_free_dsr:
1080         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1081                           dev->dsrbase);
1082 err_uar_unmap:
1083         iounmap(dev->driver_uar.map);
1084 err_unmap_regs:
1085         iounmap(dev->regs);
1086 err_free_resource:
1087         pci_release_regions(pdev);
1088 err_disable_pdev:
1089         pci_disable_device(pdev);
1090         pci_set_drvdata(pdev, NULL);
1091 err_free_device:
1092         mutex_lock(&pvrdma_device_list_lock);
1093         list_del(&dev->device_link);
1094         mutex_unlock(&pvrdma_device_list_lock);
1095         ib_dealloc_device(&dev->ib_dev);
1096         return ret;
1097 }
1098
1099 static void pvrdma_pci_remove(struct pci_dev *pdev)
1100 {
1101         struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1102
1103         if (!dev)
1104                 return;
1105
1106         dev_info(&pdev->dev, "detaching from device\n");
1107
1108         unregister_netdevice_notifier(&dev->nb_netdev);
1109         dev->nb_netdev.notifier_call = NULL;
1110
1111         flush_workqueue(event_wq);
1112
1113         if (dev->netdev) {
1114                 dev_put(dev->netdev);
1115                 dev->netdev = NULL;
1116         }
1117
1118         /* Unregister ib device */
1119         ib_unregister_device(&dev->ib_dev);
1120
1121         mutex_lock(&pvrdma_device_list_lock);
1122         list_del(&dev->device_link);
1123         mutex_unlock(&pvrdma_device_list_lock);
1124
1125         pvrdma_disable_intrs(dev);
1126         pvrdma_free_irq(dev);
1127         pci_free_irq_vectors(pdev);
1128
1129         /* Deactivate pvrdma device */
1130         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1131         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1132         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1133         pvrdma_free_slots(dev);
1134
1135         iounmap(dev->regs);
1136         kfree(dev->sgid_tbl);
1137         kfree(dev->cq_tbl);
1138         kfree(dev->srq_tbl);
1139         kfree(dev->qp_tbl);
1140         pvrdma_uar_table_cleanup(dev);
1141         iounmap(dev->driver_uar.map);
1142
1143         ib_dealloc_device(&dev->ib_dev);
1144
1145         /* Free pci resources */
1146         pci_release_regions(pdev);
1147         pci_disable_device(pdev);
1148         pci_set_drvdata(pdev, NULL);
1149 }
1150
1151 static const struct pci_device_id pvrdma_pci_table[] = {
1152         { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1153         { 0 },
1154 };
1155
1156 MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1157
1158 static struct pci_driver pvrdma_driver = {
1159         .name           = DRV_NAME,
1160         .id_table       = pvrdma_pci_table,
1161         .probe          = pvrdma_pci_probe,
1162         .remove         = pvrdma_pci_remove,
1163 };
1164
1165 static int __init pvrdma_init(void)
1166 {
1167         int err;
1168
1169         event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1170         if (!event_wq)
1171                 return -ENOMEM;
1172
1173         err = pci_register_driver(&pvrdma_driver);
1174         if (err)
1175                 destroy_workqueue(event_wq);
1176
1177         return err;
1178 }
1179
1180 static void __exit pvrdma_cleanup(void)
1181 {
1182         pci_unregister_driver(&pvrdma_driver);
1183
1184         destroy_workqueue(event_wq);
1185 }
1186
1187 module_init(pvrdma_init);
1188 module_exit(pvrdma_cleanup);
1189
1190 MODULE_AUTHOR("VMware, Inc");
1191 MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1192 MODULE_LICENSE("Dual BSD/GPL");