drivers/infiniband/hw/vmw_pvrdma/pvrdma_main.c

   1 /*
   2  * Copyright (c) 2012-2016 VMware, Inc.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of EITHER the GNU General Public License
   6  * version 2 as published by the Free Software Foundation or the BSD
   7  * 2-Clause License. This program is distributed in the hope that it
   8  * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
   9  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  10  * See the GNU General Public License version 2 for more details at
  11  * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program available in the file COPYING in the main
  15  * directory of this source tree.
  16  *
  17  * The BSD 2-Clause License
  18  *
  19  *     Redistribution and use in source and binary forms, with or
  20  *     without modification, are permitted provided that the following
  21  *     conditions are met:
  22  *
  23  *      - Redistributions of source code must retain the above
  24  *        copyright notice, this list of conditions and the following
  25  *        disclaimer.
  26  *
  27  *      - Redistributions in binary form must reproduce the above
  28  *        copyright notice, this list of conditions and the following
  29  *        disclaimer in the documentation and/or other materials
  30  *        provided with the distribution.
  31  *
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  35  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  36  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  37  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  38  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  39  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  41  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  42  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  43  * OF THE POSSIBILITY OF SUCH DAMAGE.
  44  */
  45
  46 #include <linux/errno.h>
  47 #include <linux/inetdevice.h>
  48 #include <linux/init.h>
  49 #include <linux/module.h>
  50 #include <linux/slab.h>
  51 #include <rdma/ib_addr.h>
  52 #include <rdma/ib_smi.h>
  53 #include <rdma/ib_user_verbs.h>
  54 #include <net/addrconf.h>
  55
  56 #include "pvrdma.h"
  57
  58 #define DRV_NAME        "vmw_pvrdma"
  59 #define DRV_VERSION     "1.0.1.0-k"
  60
  61 static DEFINE_MUTEX(pvrdma_device_list_lock);
  62 static LIST_HEAD(pvrdma_device_list);
  63 static struct workqueue_struct *event_wq;
  64
  65 static int pvrdma_add_gid(struct ib_device *ibdev,
  66                           u8 port_num,
  67                           unsigned int index,
  68                           const union ib_gid *gid,
  69                           const struct ib_gid_attr *attr,
  70                           void **context);
  71 static int pvrdma_del_gid(struct ib_device *ibdev,
  72                           u8 port_num,
  73                           unsigned int index,
  74                           void **context);
  75
  76
  77 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
  78                         char *buf)
  79 {
  80         return sprintf(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
  81 }
  82
  83 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
  84                         char *buf)
  85 {
  86         return sprintf(buf, "%d\n", PVRDMA_REV_ID);
  87 }
  88
  89 static ssize_t show_board(struct device *device, struct device_attribute *attr,
  90                           char *buf)
  91 {
  92         return sprintf(buf, "%d\n", PVRDMA_BOARD_ID);
  93 }
  94
  95 static DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
  96 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
  97 static DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
  98
  99 static struct device_attribute *pvrdma_class_attributes[] = {
 100         &dev_attr_hw_rev,
 101         &dev_attr_hca_type,
 102         &dev_attr_board_id
 103 };
 104
 105 static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str)
 106 {
 107         struct pvrdma_dev *dev =
 108                 container_of(device, struct pvrdma_dev, ib_dev);
 109         snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n",
 110                  (int) (dev->dsr->caps.fw_ver >> 32),
 111                  (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
 112                  (int) dev->dsr->caps.fw_ver & 0xffff);
 113 }
 114
 115 static int pvrdma_init_device(struct pvrdma_dev *dev)
 116 {
 117         /*  Initialize some device related stuff */
 118         spin_lock_init(&dev->cmd_lock);
 119         sema_init(&dev->cmd_sema, 1);
 120         atomic_set(&dev->num_qps, 0);
 121         atomic_set(&dev->num_srqs, 0);
 122         atomic_set(&dev->num_cqs, 0);
 123         atomic_set(&dev->num_pds, 0);
 124         atomic_set(&dev->num_ahs, 0);
 125
 126         return 0;
 127 }
 128
 129 static int pvrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
 130                                  struct ib_port_immutable *immutable)
 131 {
 132         struct pvrdma_dev *dev = to_vdev(ibdev);
 133         struct ib_port_attr attr;
 134         int err;
 135
 136         if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V1)
 137                 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE;
 138         else if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V2)
 139                 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
 140
 141         err = ib_query_port(ibdev, port_num, &attr);
 142         if (err)
 143                 return err;
 144
 145         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 146         immutable->gid_tbl_len = attr.gid_tbl_len;
 147         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 148         return 0;
 149 }
 150
 151 static struct net_device *pvrdma_get_netdev(struct ib_device *ibdev,
 152                                             u8 port_num)
 153 {
 154         struct net_device *netdev;
 155         struct pvrdma_dev *dev = to_vdev(ibdev);
 156
 157         if (port_num != 1)
 158                 return NULL;
 159
 160         rcu_read_lock();
 161         netdev = dev->netdev;
 162         if (netdev)
 163                 dev_hold(netdev);
 164         rcu_read_unlock();
 165
 166         return netdev;
 167 }
 168
 169 static int pvrdma_register_device(struct pvrdma_dev *dev)
 170 {
 171         int ret = -1;
 172         int i = 0;
 173
 174         strlcpy(dev->ib_dev.name, "vmw_pvrdma%d", IB_DEVICE_NAME_MAX);
 175         dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
 176         dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
 177         dev->flags = 0;
 178         dev->ib_dev.owner = THIS_MODULE;
 179         dev->ib_dev.num_comp_vectors = 1;
 180         dev->ib_dev.dev.parent = &dev->pdev->dev;
 181         dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION;
 182         dev->ib_dev.uverbs_cmd_mask =
 183                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 184                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 185                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 186                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 187                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 188                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 189                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 190                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 191                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 192                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 193                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 194                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 195                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 196                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 197                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 198                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 199                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 200                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 201                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 202                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 203
 204         dev->ib_dev.node_type = RDMA_NODE_IB_CA;
 205         dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
 206
 207         dev->ib_dev.query_device = pvrdma_query_device;
 208         dev->ib_dev.query_port = pvrdma_query_port;
 209         dev->ib_dev.query_gid = pvrdma_query_gid;
 210         dev->ib_dev.query_pkey = pvrdma_query_pkey;
 211         dev->ib_dev.modify_port = pvrdma_modify_port;
 212         dev->ib_dev.alloc_ucontext = pvrdma_alloc_ucontext;
 213         dev->ib_dev.dealloc_ucontext = pvrdma_dealloc_ucontext;
 214         dev->ib_dev.mmap = pvrdma_mmap;
 215         dev->ib_dev.alloc_pd = pvrdma_alloc_pd;
 216         dev->ib_dev.dealloc_pd = pvrdma_dealloc_pd;
 217         dev->ib_dev.create_ah = pvrdma_create_ah;
 218         dev->ib_dev.destroy_ah = pvrdma_destroy_ah;
 219         dev->ib_dev.create_qp = pvrdma_create_qp;
 220         dev->ib_dev.modify_qp = pvrdma_modify_qp;
 221         dev->ib_dev.query_qp = pvrdma_query_qp;
 222         dev->ib_dev.destroy_qp = pvrdma_destroy_qp;
 223         dev->ib_dev.post_send = pvrdma_post_send;
 224         dev->ib_dev.post_recv = pvrdma_post_recv;
 225         dev->ib_dev.create_cq = pvrdma_create_cq;
 226         dev->ib_dev.modify_cq = pvrdma_modify_cq;
 227         dev->ib_dev.resize_cq = pvrdma_resize_cq;
 228         dev->ib_dev.destroy_cq = pvrdma_destroy_cq;
 229         dev->ib_dev.poll_cq = pvrdma_poll_cq;
 230         dev->ib_dev.req_notify_cq = pvrdma_req_notify_cq;
 231         dev->ib_dev.get_dma_mr = pvrdma_get_dma_mr;
 232         dev->ib_dev.reg_user_mr = pvrdma_reg_user_mr;
 233         dev->ib_dev.dereg_mr = pvrdma_dereg_mr;
 234         dev->ib_dev.alloc_mr = pvrdma_alloc_mr;
 235         dev->ib_dev.map_mr_sg = pvrdma_map_mr_sg;
 236         dev->ib_dev.add_gid = pvrdma_add_gid;
 237         dev->ib_dev.del_gid = pvrdma_del_gid;
 238         dev->ib_dev.get_netdev = pvrdma_get_netdev;
 239         dev->ib_dev.get_port_immutable = pvrdma_port_immutable;
 240         dev->ib_dev.get_link_layer = pvrdma_port_link_layer;
 241         dev->ib_dev.get_dev_fw_str = pvrdma_get_fw_ver_str;
 242
 243         mutex_init(&dev->port_mutex);
 244         spin_lock_init(&dev->desc_lock);
 245
 246         dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(void *),
 247                               GFP_KERNEL);
 248         if (!dev->cq_tbl)
 249                 return ret;
 250         spin_lock_init(&dev->cq_tbl_lock);
 251
 252         dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(void *),
 253                               GFP_KERNEL);
 254         if (!dev->qp_tbl)
 255                 goto err_cq_free;
 256         spin_lock_init(&dev->qp_tbl_lock);
 257
 258         /* Check if SRQ is supported by backend */
 259         if (dev->dsr->caps.max_srq) {
 260                 dev->ib_dev.uverbs_cmd_mask |=
 261                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)  |
 262                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)  |
 263                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)   |
 264                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
 265                         (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
 266
 267                 dev->ib_dev.create_srq = pvrdma_create_srq;
 268                 dev->ib_dev.modify_srq = pvrdma_modify_srq;
 269                 dev->ib_dev.query_srq = pvrdma_query_srq;
 270                 dev->ib_dev.destroy_srq = pvrdma_destroy_srq;
 271                 dev->ib_dev.post_srq_recv = pvrdma_post_srq_recv;
 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         spin_lock_init(&dev->srq_tbl_lock);
 280
 281         ret = ib_register_device(&dev->ib_dev, NULL);
 282         if (ret)
 283                 goto err_srq_free;
 284
 285         for (i = 0; i < ARRAY_SIZE(pvrdma_class_attributes); ++i) {
 286                 ret = device_create_file(&dev->ib_dev.dev,
 287                                          pvrdma_class_attributes[i]);
 288                 if (ret)
 289                         goto err_class;
 290         }
 291
 292         dev->ib_active = true;
 293
 294         return 0;
 295
 296 err_class:
 297         ib_unregister_device(&dev->ib_dev);
 298 err_srq_free:
 299         kfree(dev->srq_tbl);
 300 err_qp_free:
 301         kfree(dev->qp_tbl);
 302 err_cq_free:
 303         kfree(dev->cq_tbl);
 304
 305         return ret;
 306 }
 307
 308 static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
 309 {
 310         u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
 311         struct pvrdma_dev *dev = dev_id;
 312
 313         dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
 314
 315         if (!dev->pdev->msix_enabled) {
 316                 /* Legacy intr */
 317                 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
 318                 if (icr == 0)
 319                         return IRQ_NONE;
 320         }
 321
 322         if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
 323                 complete(&dev->cmd_done);
 324
 325         return IRQ_HANDLED;
 326 }
 327
 328 static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
 329 {
 330         struct pvrdma_qp *qp;
 331         unsigned long flags;
 332
 333         spin_lock_irqsave(&dev->qp_tbl_lock, flags);
 334         qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
 335         if (qp)
 336                 atomic_inc(&qp->refcnt);
 337         spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
 338
 339         if (qp && qp->ibqp.event_handler) {
 340                 struct ib_qp *ibqp = &qp->ibqp;
 341                 struct ib_event e;
 342
 343                 e.device = ibqp->device;
 344                 e.element.qp = ibqp;
 345                 e.event = type; /* 1:1 mapping for now. */
 346                 ibqp->event_handler(&e, ibqp->qp_context);
 347         }
 348         if (qp) {
 349                 if (atomic_dec_and_test(&qp->refcnt))
 350                         complete(&qp->free);
 351         }
 352 }
 353
 354 static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
 355 {
 356         struct pvrdma_cq *cq;
 357         unsigned long flags;
 358
 359         spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 360         cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
 361         if (cq)
 362                 atomic_inc(&cq->refcnt);
 363         spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 364
 365         if (cq && cq->ibcq.event_handler) {
 366                 struct ib_cq *ibcq = &cq->ibcq;
 367                 struct ib_event e;
 368
 369                 e.device = ibcq->device;
 370                 e.element.cq = ibcq;
 371                 e.event = type; /* 1:1 mapping for now. */
 372                 ibcq->event_handler(&e, ibcq->cq_context);
 373         }
 374         if (cq) {
 375                 if (atomic_dec_and_test(&cq->refcnt))
 376                         complete(&cq->free);
 377         }
 378 }
 379
 380 static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
 381 {
 382         struct pvrdma_srq *srq;
 383         unsigned long flags;
 384
 385         spin_lock_irqsave(&dev->srq_tbl_lock, flags);
 386         if (dev->srq_tbl)
 387                 srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
 388         else
 389                 srq = NULL;
 390         if (srq)
 391                 refcount_inc(&srq->refcnt);
 392         spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
 393
 394         if (srq && srq->ibsrq.event_handler) {
 395                 struct ib_srq *ibsrq = &srq->ibsrq;
 396                 struct ib_event e;
 397
 398                 e.device = ibsrq->device;
 399                 e.element.srq = ibsrq;
 400                 e.event = type; /* 1:1 mapping for now. */
 401                 ibsrq->event_handler(&e, ibsrq->srq_context);
 402         }
 403         if (srq) {
 404                 if (refcount_dec_and_test(&srq->refcnt))
 405                         complete(&srq->free);
 406         }
 407 }
 408
 409 static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
 410                                   enum ib_event_type event)
 411 {
 412         struct ib_event ib_event;
 413
 414         memset(&ib_event, 0, sizeof(ib_event));
 415         ib_event.device = &dev->ib_dev;
 416         ib_event.element.port_num = port;
 417         ib_event.event = event;
 418         ib_dispatch_event(&ib_event);
 419 }
 420
 421 static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
 422 {
 423         if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
 424                 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
 425                 return;
 426         }
 427
 428         pvrdma_dispatch_event(dev, port, type);
 429 }
 430
 431 static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
 432 {
 433         return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
 434                                         &dev->async_pdir,
 435                                         PAGE_SIZE +
 436                                         sizeof(struct pvrdma_eqe) * i);
 437 }
 438
 439 static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
 440 {
 441         struct pvrdma_dev *dev = dev_id;
 442         struct pvrdma_ring *ring = &dev->async_ring_state->rx;
 443         int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
 444                          PAGE_SIZE / sizeof(struct pvrdma_eqe);
 445         unsigned int head;
 446
 447         dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
 448
 449         /*
 450          * Don't process events until the IB device is registered. Otherwise
 451          * we'll try to ib_dispatch_event() on an invalid device.
 452          */
 453         if (!dev->ib_active)
 454                 return IRQ_HANDLED;
 455
 456         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 457                 struct pvrdma_eqe *eqe;
 458
 459                 eqe = get_eqe(dev, head);
 460
 461                 switch (eqe->type) {
 462                 case PVRDMA_EVENT_QP_FATAL:
 463                 case PVRDMA_EVENT_QP_REQ_ERR:
 464                 case PVRDMA_EVENT_QP_ACCESS_ERR:
 465                 case PVRDMA_EVENT_COMM_EST:
 466                 case PVRDMA_EVENT_SQ_DRAINED:
 467                 case PVRDMA_EVENT_PATH_MIG:
 468                 case PVRDMA_EVENT_PATH_MIG_ERR:
 469                 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
 470                         pvrdma_qp_event(dev, eqe->info, eqe->type);
 471                         break;
 472
 473                 case PVRDMA_EVENT_CQ_ERR:
 474                         pvrdma_cq_event(dev, eqe->info, eqe->type);
 475                         break;
 476
 477                 case PVRDMA_EVENT_SRQ_ERR:
 478                 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
 479                         pvrdma_srq_event(dev, eqe->info, eqe->type);
 480                         break;
 481
 482                 case PVRDMA_EVENT_PORT_ACTIVE:
 483                 case PVRDMA_EVENT_PORT_ERR:
 484                 case PVRDMA_EVENT_LID_CHANGE:
 485                 case PVRDMA_EVENT_PKEY_CHANGE:
 486                 case PVRDMA_EVENT_SM_CHANGE:
 487                 case PVRDMA_EVENT_CLIENT_REREGISTER:
 488                 case PVRDMA_EVENT_GID_CHANGE:
 489                         pvrdma_dev_event(dev, eqe->info, eqe->type);
 490                         break;
 491
 492                 case PVRDMA_EVENT_DEVICE_FATAL:
 493                         pvrdma_dev_event(dev, 1, eqe->type);
 494                         break;
 495
 496                 default:
 497                         break;
 498                 }
 499
 500                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 501         }
 502
 503         return IRQ_HANDLED;
 504 }
 505
 506 static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
 507                                            unsigned int i)
 508 {
 509         return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
 510                                         &dev->cq_pdir,
 511                                         PAGE_SIZE +
 512                                         sizeof(struct pvrdma_cqne) * i);
 513 }
 514
 515 static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
 516 {
 517         struct pvrdma_dev *dev = dev_id;
 518         struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
 519         int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
 520                          sizeof(struct pvrdma_cqne);
 521         unsigned int head;
 522         unsigned long flags;
 523
 524         dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
 525
 526         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 527                 struct pvrdma_cqne *cqne;
 528                 struct pvrdma_cq *cq;
 529
 530                 cqne = get_cqne(dev, head);
 531                 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 532                 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
 533                 if (cq)
 534                         atomic_inc(&cq->refcnt);
 535                 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 536
 537                 if (cq && cq->ibcq.comp_handler)
 538                         cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
 539                 if (cq) {
 540                         if (atomic_dec_and_test(&cq->refcnt))
 541                                 complete(&cq->free);
 542                 }
 543                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 544         }
 545
 546         return IRQ_HANDLED;
 547 }
 548
 549 static void pvrdma_free_irq(struct pvrdma_dev *dev)
 550 {
 551         int i;
 552
 553         dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
 554         for (i = 0; i < dev->nr_vectors; i++)
 555                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 556 }
 557
 558 static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
 559 {
 560         dev_dbg(&dev->pdev->dev, "enable interrupts\n");
 561         pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
 562 }
 563
 564 static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
 565 {
 566         dev_dbg(&dev->pdev->dev, "disable interrupts\n");
 567         pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
 568 }
 569
 570 static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
 571 {
 572         struct pci_dev *pdev = dev->pdev;
 573         int ret = 0, i;
 574
 575         ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
 576                         PCI_IRQ_MSIX);
 577         if (ret < 0) {
 578                 ret = pci_alloc_irq_vectors(pdev, 1, 1,
 579                                 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
 580                 if (ret < 0)
 581                         return ret;
 582         }
 583         dev->nr_vectors = ret;
 584
 585         ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
 586                         pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
 587         if (ret) {
 588                 dev_err(&dev->pdev->dev,
 589                         "failed to request interrupt 0\n");
 590                 goto out_free_vectors;
 591         }
 592
 593         for (i = 1; i < dev->nr_vectors; i++) {
 594                 ret = request_irq(pci_irq_vector(dev->pdev, i),
 595                                 i == 1 ? pvrdma_intr1_handler :
 596                                          pvrdma_intrx_handler,
 597                                 0, DRV_NAME, dev);
 598                 if (ret) {
 599                         dev_err(&dev->pdev->dev,
 600                                 "failed to request interrupt %d\n", i);
 601                         goto free_irqs;
 602                 }
 603         }
 604
 605         return 0;
 606
 607 free_irqs:
 608         while (--i >= 0)
 609                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 610 out_free_vectors:
 611         pci_free_irq_vectors(pdev);
 612         return ret;
 613 }
 614
 615 static void pvrdma_free_slots(struct pvrdma_dev *dev)
 616 {
 617         struct pci_dev *pdev = dev->pdev;
 618
 619         if (dev->resp_slot)
 620                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
 621                                   dev->dsr->resp_slot_dma);
 622         if (dev->cmd_slot)
 623                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
 624                                   dev->dsr->cmd_slot_dma);
 625 }
 626
 627 static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
 628                                    const union ib_gid *gid,
 629                                    u8 gid_type,
 630                                    int index)
 631 {
 632         int ret;
 633         union pvrdma_cmd_req req;
 634         struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
 635
 636         if (!dev->sgid_tbl) {
 637                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 638                 return -EINVAL;
 639         }
 640
 641         memset(cmd_bind, 0, sizeof(*cmd_bind));
 642         cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
 643         memcpy(cmd_bind->new_gid, gid->raw, 16);
 644         cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
 645         cmd_bind->vlan = 0xfff;
 646         cmd_bind->index = index;
 647         cmd_bind->gid_type = gid_type;
 648
 649         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 650         if (ret < 0) {
 651                 dev_warn(&dev->pdev->dev,
 652                          "could not create binding, error: %d\n", ret);
 653                 return -EFAULT;
 654         }
 655         memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
 656         return 0;
 657 }
 658
 659 static int pvrdma_add_gid(struct ib_device *ibdev,
 660                           u8 port_num,
 661                           unsigned int index,
 662                           const union ib_gid *gid,
 663                           const struct ib_gid_attr *attr,
 664                           void **context)
 665 {
 666         struct pvrdma_dev *dev = to_vdev(ibdev);
 667
 668         return pvrdma_add_gid_at_index(dev, gid,
 669                                        ib_gid_type_to_pvrdma(attr->gid_type),
 670                                        index);
 671 }
 672
 673 static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
 674 {
 675         int ret;
 676         union pvrdma_cmd_req req;
 677         struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
 678
 679         /* Update sgid table. */
 680         if (!dev->sgid_tbl) {
 681                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 682                 return -EINVAL;
 683         }
 684
 685         memset(cmd_dest, 0, sizeof(*cmd_dest));
 686         cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
 687         memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
 688         cmd_dest->index = index;
 689
 690         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 691         if (ret < 0) {
 692                 dev_warn(&dev->pdev->dev,
 693                          "could not destroy binding, error: %d\n", ret);
 694                 return ret;
 695         }
 696         memset(&dev->sgid_tbl[index], 0, 16);
 697         return 0;
 698 }
 699
 700 static int pvrdma_del_gid(struct ib_device *ibdev,
 701                           u8 port_num,
 702                           unsigned int index,
 703                           void **context)
 704 {
 705         struct pvrdma_dev *dev = to_vdev(ibdev);
 706
 707         dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
 708                 index, dev->netdev->name);
 709
 710         return pvrdma_del_gid_at_index(dev, index);
 711 }
 712
 713 static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 714                                           unsigned long event)
 715 {
 716         switch (event) {
 717         case NETDEV_REBOOT:
 718         case NETDEV_DOWN:
 719                 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 720                 break;
 721         case NETDEV_UP:
 722                 pvrdma_write_reg(dev, PVRDMA_REG_CTL,
 723                                  PVRDMA_DEVICE_CTL_UNQUIESCE);
 724
 725                 mb();
 726
 727                 if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
 728                         dev_err(&dev->pdev->dev,
 729                                 "failed to activate device during link up\n");
 730                 else
 731                         pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 732                 break;
 733         default:
 734                 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
 735                         event, dev->ib_dev.name);
 736                 break;
 737         }
 738 }
 739
 740 static void pvrdma_netdevice_event_work(struct work_struct *work)
 741 {
 742         struct pvrdma_netdevice_work *netdev_work;
 743         struct pvrdma_dev *dev;
 744
 745         netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
 746
 747         mutex_lock(&pvrdma_device_list_lock);
 748         list_for_each_entry(dev, &pvrdma_device_list, device_link) {
 749                 if (dev->netdev == netdev_work->event_netdev) {
 750                         pvrdma_netdevice_event_handle(dev, 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 = (struct pvrdma_dev *)ib_alloc_device(sizeof(*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         memset(dev->dsr, 0, sizeof(*dev->dsr));
 895         dev->dsr->driver_version = PVRDMA_VERSION;
 896         dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 897                 PVRDMA_GOS_BITS_32 :
 898                 PVRDMA_GOS_BITS_64;
 899         dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
 900         dev->dsr->gos_info.gos_ver = 1;
 901         dev->dsr->uar_pfn = dev->driver_uar.pfn;
 902
 903         /* Command slot. */
 904         dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 905                                            &slot_dma, GFP_KERNEL);
 906         if (!dev->cmd_slot) {
 907                 ret = -ENOMEM;
 908                 goto err_free_dsr;
 909         }
 910
 911         dev->dsr->cmd_slot_dma = (u64)slot_dma;
 912
 913         /* Response slot. */
 914         dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 915                                             &slot_dma, GFP_KERNEL);
 916         if (!dev->resp_slot) {
 917                 ret = -ENOMEM;
 918                 goto err_free_slots;
 919         }
 920
 921         dev->dsr->resp_slot_dma = (u64)slot_dma;
 922
 923         /* Async event ring */
 924         dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 925         ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
 926                                    dev->dsr->async_ring_pages.num_pages, true);
 927         if (ret)
 928                 goto err_free_slots;
 929         dev->async_ring_state = dev->async_pdir.pages[0];
 930         dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
 931
 932         /* CQ notification ring */
 933         dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 934         ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
 935                                    dev->dsr->cq_ring_pages.num_pages, true);
 936         if (ret)
 937                 goto err_free_async_ring;
 938         dev->cq_ring_state = dev->cq_pdir.pages[0];
 939         dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
 940
 941         /*
 942          * Write the PA of the shared region to the device. The writes must be
 943          * ordered such that the high bits are written last. When the writes
 944          * complete, the device will have filled out the capabilities.
 945          */
 946
 947         pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
 948         pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
 949                          (u32)((u64)(dev->dsrbase) >> 32));
 950
 951         /* Make sure the write is complete before reading status. */
 952         mb();
 953
 954         /* The driver supports RoCE V1 and V2. */
 955         if (!PVRDMA_SUPPORTED(dev)) {
 956                 dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
 957                 ret = -EFAULT;
 958                 goto err_free_cq_ring;
 959         }
 960
 961         /* Paired vmxnet3 will have same bus, slot. But func will be 0 */
 962         pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
 963         if (!pdev_net) {
 964                 dev_err(&pdev->dev, "failed to find paired net device\n");
 965                 ret = -ENODEV;
 966                 goto err_free_cq_ring;
 967         }
 968
 969         if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
 970             pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
 971                 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
 972                 pci_dev_put(pdev_net);
 973                 ret = -ENODEV;
 974                 goto err_free_cq_ring;
 975         }
 976
 977         dev->netdev = pci_get_drvdata(pdev_net);
 978         pci_dev_put(pdev_net);
 979         if (!dev->netdev) {
 980                 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
 981                 ret = -ENODEV;
 982                 goto err_free_cq_ring;
 983         }
 984
 985         dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
 986
 987         /* Interrupt setup */
 988         ret = pvrdma_alloc_intrs(dev);
 989         if (ret) {
 990                 dev_err(&pdev->dev, "failed to allocate interrupts\n");
 991                 ret = -ENOMEM;
 992                 goto err_free_cq_ring;
 993         }
 994
 995         /* Allocate UAR table. */
 996         ret = pvrdma_uar_table_init(dev);
 997         if (ret) {
 998                 dev_err(&pdev->dev, "failed to allocate UAR table\n");
 999                 ret = -ENOMEM;
1000                 goto err_free_intrs;
1001         }
1002
1003         /* Allocate GID table */
1004         dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
1005                                 sizeof(union ib_gid), GFP_KERNEL);
1006         if (!dev->sgid_tbl) {
1007                 ret = -ENOMEM;
1008                 goto err_free_uar_table;
1009         }
1010         dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
1011
1012         pvrdma_enable_intrs(dev);
1013
1014         /* Activate pvrdma device */
1015         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
1016
1017         /* Make sure the write is complete before reading status. */
1018         mb();
1019
1020         /* Check if device was successfully activated */
1021         ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
1022         if (ret != 0) {
1023                 dev_err(&pdev->dev, "failed to activate device\n");
1024                 ret = -EFAULT;
1025                 goto err_disable_intr;
1026         }
1027
1028         /* Register IB device */
1029         ret = pvrdma_register_device(dev);
1030         if (ret) {
1031                 dev_err(&pdev->dev, "failed to register IB device\n");
1032                 goto err_disable_intr;
1033         }
1034
1035         dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1036         ret = register_netdevice_notifier(&dev->nb_netdev);
1037         if (ret) {
1038                 dev_err(&pdev->dev, "failed to register netdevice events\n");
1039                 goto err_unreg_ibdev;
1040         }
1041
1042         dev_info(&pdev->dev, "attached to device\n");
1043         return 0;
1044
1045 err_unreg_ibdev:
1046         ib_unregister_device(&dev->ib_dev);
1047 err_disable_intr:
1048         pvrdma_disable_intrs(dev);
1049         kfree(dev->sgid_tbl);
1050 err_free_uar_table:
1051         pvrdma_uar_table_cleanup(dev);
1052 err_free_intrs:
1053         pvrdma_free_irq(dev);
1054         pci_free_irq_vectors(pdev);
1055 err_free_cq_ring:
1056         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1057 err_free_async_ring:
1058         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1059 err_free_slots:
1060         pvrdma_free_slots(dev);
1061 err_free_dsr:
1062         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1063                           dev->dsrbase);
1064 err_uar_unmap:
1065         iounmap(dev->driver_uar.map);
1066 err_unmap_regs:
1067         iounmap(dev->regs);
1068 err_free_resource:
1069         pci_release_regions(pdev);
1070 err_disable_pdev:
1071         pci_disable_device(pdev);
1072         pci_set_drvdata(pdev, NULL);
1073 err_free_device:
1074         mutex_lock(&pvrdma_device_list_lock);
1075         list_del(&dev->device_link);
1076         mutex_unlock(&pvrdma_device_list_lock);
1077         ib_dealloc_device(&dev->ib_dev);
1078         return ret;
1079 }
1080
1081 static void pvrdma_pci_remove(struct pci_dev *pdev)
1082 {
1083         struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1084
1085         if (!dev)
1086                 return;
1087
1088         dev_info(&pdev->dev, "detaching from device\n");
1089
1090         unregister_netdevice_notifier(&dev->nb_netdev);
1091         dev->nb_netdev.notifier_call = NULL;
1092
1093         flush_workqueue(event_wq);
1094
1095         /* Unregister ib device */
1096         ib_unregister_device(&dev->ib_dev);
1097
1098         mutex_lock(&pvrdma_device_list_lock);
1099         list_del(&dev->device_link);
1100         mutex_unlock(&pvrdma_device_list_lock);
1101
1102         pvrdma_disable_intrs(dev);
1103         pvrdma_free_irq(dev);
1104         pci_free_irq_vectors(pdev);
1105
1106         /* Deactivate pvrdma device */
1107         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1108         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1109         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1110         pvrdma_free_slots(dev);
1111
1112         iounmap(dev->regs);
1113         kfree(dev->sgid_tbl);
1114         kfree(dev->cq_tbl);
1115         kfree(dev->srq_tbl);
1116         kfree(dev->qp_tbl);
1117         pvrdma_uar_table_cleanup(dev);
1118         iounmap(dev->driver_uar.map);
1119
1120         ib_dealloc_device(&dev->ib_dev);
1121
1122         /* Free pci resources */
1123         pci_release_regions(pdev);
1124         pci_disable_device(pdev);
1125         pci_set_drvdata(pdev, NULL);
1126 }
1127
1128 static const struct pci_device_id pvrdma_pci_table[] = {
1129         { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1130         { 0 },
1131 };
1132
1133 MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1134
1135 static struct pci_driver pvrdma_driver = {
1136         .name           = DRV_NAME,
1137         .id_table       = pvrdma_pci_table,
1138         .probe          = pvrdma_pci_probe,
1139         .remove         = pvrdma_pci_remove,
1140 };
1141
1142 static int __init pvrdma_init(void)
1143 {
1144         int err;
1145
1146         event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1147         if (!event_wq)
1148                 return -ENOMEM;
1149
1150         err = pci_register_driver(&pvrdma_driver);
1151         if (err)
1152                 destroy_workqueue(event_wq);
1153
1154         return err;
1155 }
1156
1157 static void __exit pvrdma_cleanup(void)
1158 {
1159         pci_unregister_driver(&pvrdma_driver);
1160
1161         destroy_workqueue(event_wq);
1162 }
1163
1164 module_init(pvrdma_init);
1165 module_exit(pvrdma_cleanup);
1166
1167 MODULE_AUTHOR("VMware, Inc");
1168 MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1169 MODULE_LICENSE("Dual BSD/GPL");