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 show_hca(struct device *device, struct device_attribute *attr,
  69                         char *buf)
  70 {
  71         return sprintf(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
  72 }
  73
  74 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
  75                         char *buf)
  76 {
  77         return sprintf(buf, "%d\n", PVRDMA_REV_ID);
  78 }
  79
  80 static ssize_t show_board(struct device *device, struct device_attribute *attr,
  81                           char *buf)
  82 {
  83         return sprintf(buf, "%d\n", PVRDMA_BOARD_ID);
  84 }
  85
  86 static DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
  87 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
  88 static DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
  89
  90 static struct device_attribute *pvrdma_class_attributes[] = {
  91         &dev_attr_hw_rev,
  92         &dev_attr_hca_type,
  93         &dev_attr_board_id
  94 };
  95
  96 static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str)
  97 {
  98         struct pvrdma_dev *dev =
  99                 container_of(device, struct pvrdma_dev, ib_dev);
 100         snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n",
 101                  (int) (dev->dsr->caps.fw_ver >> 32),
 102                  (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
 103                  (int) dev->dsr->caps.fw_ver & 0xffff);
 104 }
 105
 106 static int pvrdma_init_device(struct pvrdma_dev *dev)
 107 {
 108         /*  Initialize some device related stuff */
 109         spin_lock_init(&dev->cmd_lock);
 110         sema_init(&dev->cmd_sema, 1);
 111         atomic_set(&dev->num_qps, 0);
 112         atomic_set(&dev->num_srqs, 0);
 113         atomic_set(&dev->num_cqs, 0);
 114         atomic_set(&dev->num_pds, 0);
 115         atomic_set(&dev->num_ahs, 0);
 116
 117         return 0;
 118 }
 119
 120 static int pvrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
 121                                  struct ib_port_immutable *immutable)
 122 {
 123         struct pvrdma_dev *dev = to_vdev(ibdev);
 124         struct ib_port_attr attr;
 125         int err;
 126
 127         if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V1)
 128                 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE;
 129         else if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V2)
 130                 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
 131
 132         err = ib_query_port(ibdev, port_num, &attr);
 133         if (err)
 134                 return err;
 135
 136         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 137         immutable->gid_tbl_len = attr.gid_tbl_len;
 138         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 139         return 0;
 140 }
 141
 142 static struct net_device *pvrdma_get_netdev(struct ib_device *ibdev,
 143                                             u8 port_num)
 144 {
 145         struct net_device *netdev;
 146         struct pvrdma_dev *dev = to_vdev(ibdev);
 147
 148         if (port_num != 1)
 149                 return NULL;
 150
 151         rcu_read_lock();
 152         netdev = dev->netdev;
 153         if (netdev)
 154                 dev_hold(netdev);
 155         rcu_read_unlock();
 156
 157         return netdev;
 158 }
 159
 160 static int pvrdma_register_device(struct pvrdma_dev *dev)
 161 {
 162         int ret = -1;
 163         int i = 0;
 164
 165         strlcpy(dev->ib_dev.name, "vmw_pvrdma%d", IB_DEVICE_NAME_MAX);
 166         dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
 167         dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
 168         dev->flags = 0;
 169         dev->ib_dev.owner = THIS_MODULE;
 170         dev->ib_dev.num_comp_vectors = 1;
 171         dev->ib_dev.dev.parent = &dev->pdev->dev;
 172         dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION;
 173         dev->ib_dev.uverbs_cmd_mask =
 174                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 175                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 176                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 177                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 178                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 179                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 180                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 181                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 182                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 183                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 184                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 185                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 186                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 187                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 188                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 189                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 190                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 191                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 192                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 193                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 194
 195         dev->ib_dev.node_type = RDMA_NODE_IB_CA;
 196         dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
 197
 198         dev->ib_dev.query_device = pvrdma_query_device;
 199         dev->ib_dev.query_port = pvrdma_query_port;
 200         dev->ib_dev.query_gid = pvrdma_query_gid;
 201         dev->ib_dev.query_pkey = pvrdma_query_pkey;
 202         dev->ib_dev.modify_port = pvrdma_modify_port;
 203         dev->ib_dev.alloc_ucontext = pvrdma_alloc_ucontext;
 204         dev->ib_dev.dealloc_ucontext = pvrdma_dealloc_ucontext;
 205         dev->ib_dev.mmap = pvrdma_mmap;
 206         dev->ib_dev.alloc_pd = pvrdma_alloc_pd;
 207         dev->ib_dev.dealloc_pd = pvrdma_dealloc_pd;
 208         dev->ib_dev.create_ah = pvrdma_create_ah;
 209         dev->ib_dev.destroy_ah = pvrdma_destroy_ah;
 210         dev->ib_dev.create_qp = pvrdma_create_qp;
 211         dev->ib_dev.modify_qp = pvrdma_modify_qp;
 212         dev->ib_dev.query_qp = pvrdma_query_qp;
 213         dev->ib_dev.destroy_qp = pvrdma_destroy_qp;
 214         dev->ib_dev.post_send = pvrdma_post_send;
 215         dev->ib_dev.post_recv = pvrdma_post_recv;
 216         dev->ib_dev.create_cq = pvrdma_create_cq;
 217         dev->ib_dev.destroy_cq = pvrdma_destroy_cq;
 218         dev->ib_dev.poll_cq = pvrdma_poll_cq;
 219         dev->ib_dev.req_notify_cq = pvrdma_req_notify_cq;
 220         dev->ib_dev.get_dma_mr = pvrdma_get_dma_mr;
 221         dev->ib_dev.reg_user_mr = pvrdma_reg_user_mr;
 222         dev->ib_dev.dereg_mr = pvrdma_dereg_mr;
 223         dev->ib_dev.alloc_mr = pvrdma_alloc_mr;
 224         dev->ib_dev.map_mr_sg = pvrdma_map_mr_sg;
 225         dev->ib_dev.add_gid = pvrdma_add_gid;
 226         dev->ib_dev.del_gid = pvrdma_del_gid;
 227         dev->ib_dev.get_netdev = pvrdma_get_netdev;
 228         dev->ib_dev.get_port_immutable = pvrdma_port_immutable;
 229         dev->ib_dev.get_link_layer = pvrdma_port_link_layer;
 230         dev->ib_dev.get_dev_fw_str = pvrdma_get_fw_ver_str;
 231
 232         mutex_init(&dev->port_mutex);
 233         spin_lock_init(&dev->desc_lock);
 234
 235         dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *),
 236                               GFP_KERNEL);
 237         if (!dev->cq_tbl)
 238                 return ret;
 239         spin_lock_init(&dev->cq_tbl_lock);
 240
 241         dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *),
 242                               GFP_KERNEL);
 243         if (!dev->qp_tbl)
 244                 goto err_cq_free;
 245         spin_lock_init(&dev->qp_tbl_lock);
 246
 247         /* Check if SRQ is supported by backend */
 248         if (dev->dsr->caps.max_srq) {
 249                 dev->ib_dev.uverbs_cmd_mask |=
 250                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)  |
 251                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)  |
 252                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)   |
 253                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
 254                         (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
 255
 256                 dev->ib_dev.create_srq = pvrdma_create_srq;
 257                 dev->ib_dev.modify_srq = pvrdma_modify_srq;
 258                 dev->ib_dev.query_srq = pvrdma_query_srq;
 259                 dev->ib_dev.destroy_srq = pvrdma_destroy_srq;
 260
 261                 dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
 262                                        sizeof(struct pvrdma_srq *),
 263                                        GFP_KERNEL);
 264                 if (!dev->srq_tbl)
 265                         goto err_qp_free;
 266         }
 267         dev->ib_dev.driver_id = RDMA_DRIVER_VMW_PVRDMA;
 268         spin_lock_init(&dev->srq_tbl_lock);
 269
 270         ret = ib_register_device(&dev->ib_dev, NULL);
 271         if (ret)
 272                 goto err_srq_free;
 273
 274         for (i = 0; i < ARRAY_SIZE(pvrdma_class_attributes); ++i) {
 275                 ret = device_create_file(&dev->ib_dev.dev,
 276                                          pvrdma_class_attributes[i]);
 277                 if (ret)
 278                         goto err_class;
 279         }
 280
 281         dev->ib_active = true;
 282
 283         return 0;
 284
 285 err_class:
 286         ib_unregister_device(&dev->ib_dev);
 287 err_srq_free:
 288         kfree(dev->srq_tbl);
 289 err_qp_free:
 290         kfree(dev->qp_tbl);
 291 err_cq_free:
 292         kfree(dev->cq_tbl);
 293
 294         return ret;
 295 }
 296
 297 static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
 298 {
 299         u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
 300         struct pvrdma_dev *dev = dev_id;
 301
 302         dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
 303
 304         if (!dev->pdev->msix_enabled) {
 305                 /* Legacy intr */
 306                 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
 307                 if (icr == 0)
 308                         return IRQ_NONE;
 309         }
 310
 311         if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
 312                 complete(&dev->cmd_done);
 313
 314         return IRQ_HANDLED;
 315 }
 316
 317 static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
 318 {
 319         struct pvrdma_qp *qp;
 320         unsigned long flags;
 321
 322         spin_lock_irqsave(&dev->qp_tbl_lock, flags);
 323         qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
 324         if (qp)
 325                 refcount_inc(&qp->refcnt);
 326         spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
 327
 328         if (qp && qp->ibqp.event_handler) {
 329                 struct ib_qp *ibqp = &qp->ibqp;
 330                 struct ib_event e;
 331
 332                 e.device = ibqp->device;
 333                 e.element.qp = ibqp;
 334                 e.event = type; /* 1:1 mapping for now. */
 335                 ibqp->event_handler(&e, ibqp->qp_context);
 336         }
 337         if (qp) {
 338                 if (refcount_dec_and_test(&qp->refcnt))
 339                         complete(&qp->free);
 340         }
 341 }
 342
 343 static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
 344 {
 345         struct pvrdma_cq *cq;
 346         unsigned long flags;
 347
 348         spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 349         cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
 350         if (cq)
 351                 refcount_inc(&cq->refcnt);
 352         spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 353
 354         if (cq && cq->ibcq.event_handler) {
 355                 struct ib_cq *ibcq = &cq->ibcq;
 356                 struct ib_event e;
 357
 358                 e.device = ibcq->device;
 359                 e.element.cq = ibcq;
 360                 e.event = type; /* 1:1 mapping for now. */
 361                 ibcq->event_handler(&e, ibcq->cq_context);
 362         }
 363         if (cq) {
 364                 if (refcount_dec_and_test(&cq->refcnt))
 365                         complete(&cq->free);
 366         }
 367 }
 368
 369 static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
 370 {
 371         struct pvrdma_srq *srq;
 372         unsigned long flags;
 373
 374         spin_lock_irqsave(&dev->srq_tbl_lock, flags);
 375         if (dev->srq_tbl)
 376                 srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
 377         else
 378                 srq = NULL;
 379         if (srq)
 380                 refcount_inc(&srq->refcnt);
 381         spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
 382
 383         if (srq && srq->ibsrq.event_handler) {
 384                 struct ib_srq *ibsrq = &srq->ibsrq;
 385                 struct ib_event e;
 386
 387                 e.device = ibsrq->device;
 388                 e.element.srq = ibsrq;
 389                 e.event = type; /* 1:1 mapping for now. */
 390                 ibsrq->event_handler(&e, ibsrq->srq_context);
 391         }
 392         if (srq) {
 393                 if (refcount_dec_and_test(&srq->refcnt))
 394                         complete(&srq->free);
 395         }
 396 }
 397
 398 static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
 399                                   enum ib_event_type event)
 400 {
 401         struct ib_event ib_event;
 402
 403         memset(&ib_event, 0, sizeof(ib_event));
 404         ib_event.device = &dev->ib_dev;
 405         ib_event.element.port_num = port;
 406         ib_event.event = event;
 407         ib_dispatch_event(&ib_event);
 408 }
 409
 410 static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
 411 {
 412         if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
 413                 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
 414                 return;
 415         }
 416
 417         pvrdma_dispatch_event(dev, port, type);
 418 }
 419
 420 static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
 421 {
 422         return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
 423                                         &dev->async_pdir,
 424                                         PAGE_SIZE +
 425                                         sizeof(struct pvrdma_eqe) * i);
 426 }
 427
 428 static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
 429 {
 430         struct pvrdma_dev *dev = dev_id;
 431         struct pvrdma_ring *ring = &dev->async_ring_state->rx;
 432         int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
 433                          PAGE_SIZE / sizeof(struct pvrdma_eqe);
 434         unsigned int head;
 435
 436         dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
 437
 438         /*
 439          * Don't process events until the IB device is registered. Otherwise
 440          * we'll try to ib_dispatch_event() on an invalid device.
 441          */
 442         if (!dev->ib_active)
 443                 return IRQ_HANDLED;
 444
 445         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 446                 struct pvrdma_eqe *eqe;
 447
 448                 eqe = get_eqe(dev, head);
 449
 450                 switch (eqe->type) {
 451                 case PVRDMA_EVENT_QP_FATAL:
 452                 case PVRDMA_EVENT_QP_REQ_ERR:
 453                 case PVRDMA_EVENT_QP_ACCESS_ERR:
 454                 case PVRDMA_EVENT_COMM_EST:
 455                 case PVRDMA_EVENT_SQ_DRAINED:
 456                 case PVRDMA_EVENT_PATH_MIG:
 457                 case PVRDMA_EVENT_PATH_MIG_ERR:
 458                 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
 459                         pvrdma_qp_event(dev, eqe->info, eqe->type);
 460                         break;
 461
 462                 case PVRDMA_EVENT_CQ_ERR:
 463                         pvrdma_cq_event(dev, eqe->info, eqe->type);
 464                         break;
 465
 466                 case PVRDMA_EVENT_SRQ_ERR:
 467                 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
 468                         pvrdma_srq_event(dev, eqe->info, eqe->type);
 469                         break;
 470
 471                 case PVRDMA_EVENT_PORT_ACTIVE:
 472                 case PVRDMA_EVENT_PORT_ERR:
 473                 case PVRDMA_EVENT_LID_CHANGE:
 474                 case PVRDMA_EVENT_PKEY_CHANGE:
 475                 case PVRDMA_EVENT_SM_CHANGE:
 476                 case PVRDMA_EVENT_CLIENT_REREGISTER:
 477                 case PVRDMA_EVENT_GID_CHANGE:
 478                         pvrdma_dev_event(dev, eqe->info, eqe->type);
 479                         break;
 480
 481                 case PVRDMA_EVENT_DEVICE_FATAL:
 482                         pvrdma_dev_event(dev, 1, eqe->type);
 483                         break;
 484
 485                 default:
 486                         break;
 487                 }
 488
 489                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 490         }
 491
 492         return IRQ_HANDLED;
 493 }
 494
 495 static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
 496                                            unsigned int i)
 497 {
 498         return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
 499                                         &dev->cq_pdir,
 500                                         PAGE_SIZE +
 501                                         sizeof(struct pvrdma_cqne) * i);
 502 }
 503
 504 static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
 505 {
 506         struct pvrdma_dev *dev = dev_id;
 507         struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
 508         int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
 509                          sizeof(struct pvrdma_cqne);
 510         unsigned int head;
 511         unsigned long flags;
 512
 513         dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
 514
 515         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 516                 struct pvrdma_cqne *cqne;
 517                 struct pvrdma_cq *cq;
 518
 519                 cqne = get_cqne(dev, head);
 520                 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 521                 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
 522                 if (cq)
 523                         refcount_inc(&cq->refcnt);
 524                 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 525
 526                 if (cq && cq->ibcq.comp_handler)
 527                         cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
 528                 if (cq) {
 529                         if (refcount_dec_and_test(&cq->refcnt))
 530                                 complete(&cq->free);
 531                 }
 532                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 533         }
 534
 535         return IRQ_HANDLED;
 536 }
 537
 538 static void pvrdma_free_irq(struct pvrdma_dev *dev)
 539 {
 540         int i;
 541
 542         dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
 543         for (i = 0; i < dev->nr_vectors; i++)
 544                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 545 }
 546
 547 static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
 548 {
 549         dev_dbg(&dev->pdev->dev, "enable interrupts\n");
 550         pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
 551 }
 552
 553 static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
 554 {
 555         dev_dbg(&dev->pdev->dev, "disable interrupts\n");
 556         pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
 557 }
 558
 559 static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
 560 {
 561         struct pci_dev *pdev = dev->pdev;
 562         int ret = 0, i;
 563
 564         ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
 565                         PCI_IRQ_MSIX);
 566         if (ret < 0) {
 567                 ret = pci_alloc_irq_vectors(pdev, 1, 1,
 568                                 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
 569                 if (ret < 0)
 570                         return ret;
 571         }
 572         dev->nr_vectors = ret;
 573
 574         ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
 575                         pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
 576         if (ret) {
 577                 dev_err(&dev->pdev->dev,
 578                         "failed to request interrupt 0\n");
 579                 goto out_free_vectors;
 580         }
 581
 582         for (i = 1; i < dev->nr_vectors; i++) {
 583                 ret = request_irq(pci_irq_vector(dev->pdev, i),
 584                                 i == 1 ? pvrdma_intr1_handler :
 585                                          pvrdma_intrx_handler,
 586                                 0, DRV_NAME, dev);
 587                 if (ret) {
 588                         dev_err(&dev->pdev->dev,
 589                                 "failed to request interrupt %d\n", i);
 590                         goto free_irqs;
 591                 }
 592         }
 593
 594         return 0;
 595
 596 free_irqs:
 597         while (--i >= 0)
 598                 free_irq(pci_irq_vector(dev->pdev, i), dev);
 599 out_free_vectors:
 600         pci_free_irq_vectors(pdev);
 601         return ret;
 602 }
 603
 604 static void pvrdma_free_slots(struct pvrdma_dev *dev)
 605 {
 606         struct pci_dev *pdev = dev->pdev;
 607
 608         if (dev->resp_slot)
 609                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
 610                                   dev->dsr->resp_slot_dma);
 611         if (dev->cmd_slot)
 612                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
 613                                   dev->dsr->cmd_slot_dma);
 614 }
 615
 616 static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
 617                                    const union ib_gid *gid,
 618                                    u8 gid_type,
 619                                    int index)
 620 {
 621         int ret;
 622         union pvrdma_cmd_req req;
 623         struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
 624
 625         if (!dev->sgid_tbl) {
 626                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 627                 return -EINVAL;
 628         }
 629
 630         memset(cmd_bind, 0, sizeof(*cmd_bind));
 631         cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
 632         memcpy(cmd_bind->new_gid, gid->raw, 16);
 633         cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
 634         cmd_bind->vlan = 0xfff;
 635         cmd_bind->index = index;
 636         cmd_bind->gid_type = gid_type;
 637
 638         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 639         if (ret < 0) {
 640                 dev_warn(&dev->pdev->dev,
 641                          "could not create binding, error: %d\n", ret);
 642                 return -EFAULT;
 643         }
 644         memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
 645         return 0;
 646 }
 647
 648 static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context)
 649 {
 650         struct pvrdma_dev *dev = to_vdev(attr->device);
 651
 652         return pvrdma_add_gid_at_index(dev, &attr->gid,
 653                                        ib_gid_type_to_pvrdma(attr->gid_type),
 654                                        attr->index);
 655 }
 656
 657 static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
 658 {
 659         int ret;
 660         union pvrdma_cmd_req req;
 661         struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
 662
 663         /* Update sgid table. */
 664         if (!dev->sgid_tbl) {
 665                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 666                 return -EINVAL;
 667         }
 668
 669         memset(cmd_dest, 0, sizeof(*cmd_dest));
 670         cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
 671         memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
 672         cmd_dest->index = index;
 673
 674         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 675         if (ret < 0) {
 676                 dev_warn(&dev->pdev->dev,
 677                          "could not destroy binding, error: %d\n", ret);
 678                 return ret;
 679         }
 680         memset(&dev->sgid_tbl[index], 0, 16);
 681         return 0;
 682 }
 683
 684 static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context)
 685 {
 686         struct pvrdma_dev *dev = to_vdev(attr->device);
 687
 688         dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
 689                 attr->index, dev->netdev->name);
 690
 691         return pvrdma_del_gid_at_index(dev, attr->index);
 692 }
 693
 694 static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 695                                           struct net_device *ndev,
 696                                           unsigned long event)
 697 {
 698         struct pci_dev *pdev_net;
 699         unsigned int slot;
 700
 701         switch (event) {
 702         case NETDEV_REBOOT:
 703         case NETDEV_DOWN:
 704                 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 705                 break;
 706         case NETDEV_UP:
 707                 pvrdma_write_reg(dev, PVRDMA_REG_CTL,
 708                                  PVRDMA_DEVICE_CTL_UNQUIESCE);
 709
 710                 mb();
 711
 712                 if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
 713                         dev_err(&dev->pdev->dev,
 714                                 "failed to activate device during link up\n");
 715                 else
 716                         pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 717                 break;
 718         case NETDEV_UNREGISTER:
 719                 dev_put(dev->netdev);
 720                 dev->netdev = NULL;
 721                 break;
 722         case NETDEV_REGISTER:
 723                 /* vmxnet3 will have same bus, slot. But func will be 0 */
 724                 slot = PCI_SLOT(dev->pdev->devfn);
 725                 pdev_net = pci_get_slot(dev->pdev->bus,
 726                                         PCI_DEVFN(slot, 0));
 727                 if ((dev->netdev == NULL) &&
 728                     (pci_get_drvdata(pdev_net) == ndev)) {
 729                         /* this is our netdev */
 730                         dev->netdev = ndev;
 731                         dev_hold(ndev);
 732                 }
 733                 pci_dev_put(pdev_net);
 734                 break;
 735
 736         default:
 737                 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
 738                         event, dev->ib_dev.name);
 739                 break;
 740         }
 741 }
 742
 743 static void pvrdma_netdevice_event_work(struct work_struct *work)
 744 {
 745         struct pvrdma_netdevice_work *netdev_work;
 746         struct pvrdma_dev *dev;
 747
 748         netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
 749
 750         mutex_lock(&pvrdma_device_list_lock);
 751         list_for_each_entry(dev, &pvrdma_device_list, device_link) {
 752                 if ((netdev_work->event == NETDEV_REGISTER) ||
 753                     (dev->netdev == netdev_work->event_netdev)) {
 754                         pvrdma_netdevice_event_handle(dev,
 755                                                       netdev_work->event_netdev,
 756                                                       netdev_work->event);
 757                         break;
 758                 }
 759         }
 760         mutex_unlock(&pvrdma_device_list_lock);
 761
 762         kfree(netdev_work);
 763 }
 764
 765 static int pvrdma_netdevice_event(struct notifier_block *this,
 766                                   unsigned long event, void *ptr)
 767 {
 768         struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
 769         struct pvrdma_netdevice_work *netdev_work;
 770
 771         netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
 772         if (!netdev_work)
 773                 return NOTIFY_BAD;
 774
 775         INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
 776         netdev_work->event_netdev = event_netdev;
 777         netdev_work->event = event;
 778         queue_work(event_wq, &netdev_work->work);
 779
 780         return NOTIFY_DONE;
 781 }
 782
 783 static int pvrdma_pci_probe(struct pci_dev *pdev,
 784                             const struct pci_device_id *id)
 785 {
 786         struct pci_dev *pdev_net;
 787         struct pvrdma_dev *dev;
 788         int ret;
 789         unsigned long start;
 790         unsigned long len;
 791         dma_addr_t slot_dma = 0;
 792
 793         dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
 794
 795         /* Allocate zero-out device */
 796         dev = (struct pvrdma_dev *)ib_alloc_device(sizeof(*dev));
 797         if (!dev) {
 798                 dev_err(&pdev->dev, "failed to allocate IB device\n");
 799                 return -ENOMEM;
 800         }
 801
 802         mutex_lock(&pvrdma_device_list_lock);
 803         list_add(&dev->device_link, &pvrdma_device_list);
 804         mutex_unlock(&pvrdma_device_list_lock);
 805
 806         ret = pvrdma_init_device(dev);
 807         if (ret)
 808                 goto err_free_device;
 809
 810         dev->pdev = pdev;
 811         pci_set_drvdata(pdev, dev);
 812
 813         ret = pci_enable_device(pdev);
 814         if (ret) {
 815                 dev_err(&pdev->dev, "cannot enable PCI device\n");
 816                 goto err_free_device;
 817         }
 818
 819         dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
 820                 pci_resource_flags(pdev, 0));
 821         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 822                 (unsigned long long)pci_resource_len(pdev, 0));
 823         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 824                 (unsigned long long)pci_resource_start(pdev, 0));
 825         dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
 826                 pci_resource_flags(pdev, 1));
 827         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 828                 (unsigned long long)pci_resource_len(pdev, 1));
 829         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 830                 (unsigned long long)pci_resource_start(pdev, 1));
 831
 832         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
 833             !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 834                 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
 835                 ret = -ENOMEM;
 836                 goto err_disable_pdev;
 837         }
 838
 839         ret = pci_request_regions(pdev, DRV_NAME);
 840         if (ret) {
 841                 dev_err(&pdev->dev, "cannot request PCI resources\n");
 842                 goto err_disable_pdev;
 843         }
 844
 845         /* Enable 64-Bit DMA */
 846         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
 847                 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 848                 if (ret != 0) {
 849                         dev_err(&pdev->dev,
 850                                 "pci_set_consistent_dma_mask failed\n");
 851                         goto err_free_resource;
 852                 }
 853         } else {
 854                 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 855                 if (ret != 0) {
 856                         dev_err(&pdev->dev,
 857                                 "pci_set_dma_mask failed\n");
 858                         goto err_free_resource;
 859                 }
 860         }
 861
 862         pci_set_master(pdev);
 863
 864         /* Map register space */
 865         start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 866         len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 867         dev->regs = ioremap(start, len);
 868         if (!dev->regs) {
 869                 dev_err(&pdev->dev, "register mapping failed\n");
 870                 ret = -ENOMEM;
 871                 goto err_free_resource;
 872         }
 873
 874         /* Setup per-device UAR. */
 875         dev->driver_uar.index = 0;
 876         dev->driver_uar.pfn =
 877                 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
 878                 PAGE_SHIFT;
 879         dev->driver_uar.map =
 880                 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 881         if (!dev->driver_uar.map) {
 882                 dev_err(&pdev->dev, "failed to remap UAR pages\n");
 883                 ret = -ENOMEM;
 884                 goto err_unmap_regs;
 885         }
 886
 887         dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
 888         dev_info(&pdev->dev, "device version %d, driver version %d\n",
 889                  dev->dsr_version, PVRDMA_VERSION);
 890
 891         dev->dsr = dma_zalloc_coherent(&pdev->dev, sizeof(*dev->dsr),
 892                                        &dev->dsrbase, GFP_KERNEL);
 893         if (!dev->dsr) {
 894                 dev_err(&pdev->dev, "failed to allocate shared region\n");
 895                 ret = -ENOMEM;
 896                 goto err_uar_unmap;
 897         }
 898
 899         /* Setup the shared region */
 900         dev->dsr->driver_version = PVRDMA_VERSION;
 901         dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 902                 PVRDMA_GOS_BITS_32 :
 903                 PVRDMA_GOS_BITS_64;
 904         dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
 905         dev->dsr->gos_info.gos_ver = 1;
 906         dev->dsr->uar_pfn = dev->driver_uar.pfn;
 907
 908         /* Command slot. */
 909         dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 910                                            &slot_dma, GFP_KERNEL);
 911         if (!dev->cmd_slot) {
 912                 ret = -ENOMEM;
 913                 goto err_free_dsr;
 914         }
 915
 916         dev->dsr->cmd_slot_dma = (u64)slot_dma;
 917
 918         /* Response slot. */
 919         dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 920                                             &slot_dma, GFP_KERNEL);
 921         if (!dev->resp_slot) {
 922                 ret = -ENOMEM;
 923                 goto err_free_slots;
 924         }
 925
 926         dev->dsr->resp_slot_dma = (u64)slot_dma;
 927
 928         /* Async event ring */
 929         dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 930         ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
 931                                    dev->dsr->async_ring_pages.num_pages, true);
 932         if (ret)
 933                 goto err_free_slots;
 934         dev->async_ring_state = dev->async_pdir.pages[0];
 935         dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
 936
 937         /* CQ notification ring */
 938         dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 939         ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
 940                                    dev->dsr->cq_ring_pages.num_pages, true);
 941         if (ret)
 942                 goto err_free_async_ring;
 943         dev->cq_ring_state = dev->cq_pdir.pages[0];
 944         dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
 945
 946         /*
 947          * Write the PA of the shared region to the device. The writes must be
 948          * ordered such that the high bits are written last. When the writes
 949          * complete, the device will have filled out the capabilities.
 950          */
 951
 952         pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
 953         pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
 954                          (u32)((u64)(dev->dsrbase) >> 32));
 955
 956         /* Make sure the write is complete before reading status. */
 957         mb();
 958
 959         /* The driver supports RoCE V1 and V2. */
 960         if (!PVRDMA_SUPPORTED(dev)) {
 961                 dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
 962                 ret = -EFAULT;
 963                 goto err_free_cq_ring;
 964         }
 965
 966         /* Paired vmxnet3 will have same bus, slot. But func will be 0 */
 967         pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
 968         if (!pdev_net) {
 969                 dev_err(&pdev->dev, "failed to find paired net device\n");
 970                 ret = -ENODEV;
 971                 goto err_free_cq_ring;
 972         }
 973
 974         if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
 975             pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
 976                 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
 977                 pci_dev_put(pdev_net);
 978                 ret = -ENODEV;
 979                 goto err_free_cq_ring;
 980         }
 981
 982         dev->netdev = pci_get_drvdata(pdev_net);
 983         pci_dev_put(pdev_net);
 984         if (!dev->netdev) {
 985                 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
 986                 ret = -ENODEV;
 987                 goto err_free_cq_ring;
 988         }
 989         dev_hold(dev->netdev);
 990
 991         dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
 992
 993         /* Interrupt setup */
 994         ret = pvrdma_alloc_intrs(dev);
 995         if (ret) {
 996                 dev_err(&pdev->dev, "failed to allocate interrupts\n");
 997                 ret = -ENOMEM;
 998                 goto err_free_cq_ring;
 999         }
1000
1001         /* Allocate UAR table. */
1002         ret = pvrdma_uar_table_init(dev);
1003         if (ret) {
1004                 dev_err(&pdev->dev, "failed to allocate UAR table\n");
1005                 ret = -ENOMEM;
1006                 goto err_free_intrs;
1007         }
1008
1009         /* Allocate GID table */
1010         dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
1011                                 sizeof(union ib_gid), GFP_KERNEL);
1012         if (!dev->sgid_tbl) {
1013                 ret = -ENOMEM;
1014                 goto err_free_uar_table;
1015         }
1016         dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
1017
1018         pvrdma_enable_intrs(dev);
1019
1020         /* Activate pvrdma device */
1021         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
1022
1023         /* Make sure the write is complete before reading status. */
1024         mb();
1025
1026         /* Check if device was successfully activated */
1027         ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
1028         if (ret != 0) {
1029                 dev_err(&pdev->dev, "failed to activate device\n");
1030                 ret = -EFAULT;
1031                 goto err_disable_intr;
1032         }
1033
1034         /* Register IB device */
1035         ret = pvrdma_register_device(dev);
1036         if (ret) {
1037                 dev_err(&pdev->dev, "failed to register IB device\n");
1038                 goto err_disable_intr;
1039         }
1040
1041         dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1042         ret = register_netdevice_notifier(&dev->nb_netdev);
1043         if (ret) {
1044                 dev_err(&pdev->dev, "failed to register netdevice events\n");
1045                 goto err_unreg_ibdev;
1046         }
1047
1048         dev_info(&pdev->dev, "attached to device\n");
1049         return 0;
1050
1051 err_unreg_ibdev:
1052         ib_unregister_device(&dev->ib_dev);
1053 err_disable_intr:
1054         pvrdma_disable_intrs(dev);
1055         kfree(dev->sgid_tbl);
1056 err_free_uar_table:
1057         pvrdma_uar_table_cleanup(dev);
1058 err_free_intrs:
1059         pvrdma_free_irq(dev);
1060         pci_free_irq_vectors(pdev);
1061 err_free_cq_ring:
1062         if (dev->netdev) {
1063                 dev_put(dev->netdev);
1064                 dev->netdev = NULL;
1065         }
1066         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1067 err_free_async_ring:
1068         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1069 err_free_slots:
1070         pvrdma_free_slots(dev);
1071 err_free_dsr:
1072         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1073                           dev->dsrbase);
1074 err_uar_unmap:
1075         iounmap(dev->driver_uar.map);
1076 err_unmap_regs:
1077         iounmap(dev->regs);
1078 err_free_resource:
1079         pci_release_regions(pdev);
1080 err_disable_pdev:
1081         pci_disable_device(pdev);
1082         pci_set_drvdata(pdev, NULL);
1083 err_free_device:
1084         mutex_lock(&pvrdma_device_list_lock);
1085         list_del(&dev->device_link);
1086         mutex_unlock(&pvrdma_device_list_lock);
1087         ib_dealloc_device(&dev->ib_dev);
1088         return ret;
1089 }
1090
1091 static void pvrdma_pci_remove(struct pci_dev *pdev)
1092 {
1093         struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1094
1095         if (!dev)
1096                 return;
1097
1098         dev_info(&pdev->dev, "detaching from device\n");
1099
1100         unregister_netdevice_notifier(&dev->nb_netdev);
1101         dev->nb_netdev.notifier_call = NULL;
1102
1103         flush_workqueue(event_wq);
1104
1105         if (dev->netdev) {
1106                 dev_put(dev->netdev);
1107                 dev->netdev = NULL;
1108         }
1109
1110         /* Unregister ib device */
1111         ib_unregister_device(&dev->ib_dev);
1112
1113         mutex_lock(&pvrdma_device_list_lock);
1114         list_del(&dev->device_link);
1115         mutex_unlock(&pvrdma_device_list_lock);
1116
1117         pvrdma_disable_intrs(dev);
1118         pvrdma_free_irq(dev);
1119         pci_free_irq_vectors(pdev);
1120
1121         /* Deactivate pvrdma device */
1122         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1123         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1124         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1125         pvrdma_free_slots(dev);
1126         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1127                           dev->dsrbase);
1128
1129         iounmap(dev->regs);
1130         kfree(dev->sgid_tbl);
1131         kfree(dev->cq_tbl);
1132         kfree(dev->srq_tbl);
1133         kfree(dev->qp_tbl);
1134         pvrdma_uar_table_cleanup(dev);
1135         iounmap(dev->driver_uar.map);
1136
1137         ib_dealloc_device(&dev->ib_dev);
1138
1139         /* Free pci resources */
1140         pci_release_regions(pdev);
1141         pci_disable_device(pdev);
1142         pci_set_drvdata(pdev, NULL);
1143 }
1144
1145 static const struct pci_device_id pvrdma_pci_table[] = {
1146         { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1147         { 0 },
1148 };
1149
1150 MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1151
1152 static struct pci_driver pvrdma_driver = {
1153         .name           = DRV_NAME,
1154         .id_table       = pvrdma_pci_table,
1155         .probe          = pvrdma_pci_probe,
1156         .remove         = pvrdma_pci_remove,
1157 };
1158
1159 static int __init pvrdma_init(void)
1160 {
1161         int err;
1162
1163         event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1164         if (!event_wq)
1165                 return -ENOMEM;
1166
1167         err = pci_register_driver(&pvrdma_driver);
1168         if (err)
1169                 destroy_workqueue(event_wq);
1170
1171         return err;
1172 }
1173
1174 static void __exit pvrdma_cleanup(void)
1175 {
1176         pci_unregister_driver(&pvrdma_driver);
1177
1178         destroy_workqueue(event_wq);
1179 }
1180
1181 module_init(pvrdma_init);
1182 module_exit(pvrdma_cleanup);
1183
1184 MODULE_AUTHOR("VMware, Inc");
1185 MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1186 MODULE_LICENSE("Dual BSD/GPL");