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     "1.0.0.0-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                                   size_t str_len)
 107 {
 108         struct pvrdma_dev *dev =
 109                 container_of(device, struct pvrdma_dev, ib_dev);
 110         snprintf(str, str_len, "%d.%d.%d\n",
 111                  (int) (dev->dsr->caps.fw_ver >> 32),
 112                  (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
 113                  (int) dev->dsr->caps.fw_ver & 0xffff);
 114 }
 115
 116 static int pvrdma_init_device(struct pvrdma_dev *dev)
 117 {
 118         /*  Initialize some device related stuff */
 119         spin_lock_init(&dev->cmd_lock);
 120         sema_init(&dev->cmd_sema, 1);
 121         atomic_set(&dev->num_qps, 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 ib_port_attr attr;
 133         int err;
 134
 135         err = pvrdma_query_port(ibdev, port_num, &attr);
 136         if (err)
 137                 return err;
 138
 139         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 140         immutable->gid_tbl_len = attr.gid_tbl_len;
 141         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
 142         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 143         return 0;
 144 }
 145
 146 static struct net_device *pvrdma_get_netdev(struct ib_device *ibdev,
 147                                             u8 port_num)
 148 {
 149         struct net_device *netdev;
 150         struct pvrdma_dev *dev = to_vdev(ibdev);
 151
 152         if (port_num != 1)
 153                 return NULL;
 154
 155         rcu_read_lock();
 156         netdev = dev->netdev;
 157         if (netdev)
 158                 dev_hold(netdev);
 159         rcu_read_unlock();
 160
 161         return netdev;
 162 }
 163
 164 static int pvrdma_register_device(struct pvrdma_dev *dev)
 165 {
 166         int ret = -1;
 167         int i = 0;
 168
 169         strlcpy(dev->ib_dev.name, "vmw_pvrdma%d", IB_DEVICE_NAME_MAX);
 170         dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
 171         dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
 172         dev->flags = 0;
 173         dev->ib_dev.owner = THIS_MODULE;
 174         dev->ib_dev.num_comp_vectors = 1;
 175         dev->ib_dev.dma_device = &dev->pdev->dev;
 176         dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION;
 177         dev->ib_dev.uverbs_cmd_mask =
 178                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 179                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 180                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 181                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 182                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 183                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 184                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 185                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 186                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 187                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 188                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 189                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 190                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 191                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 192                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 193                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 194                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 195                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 196                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 197                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
 198
 199         dev->ib_dev.node_type = RDMA_NODE_IB_CA;
 200         dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
 201
 202         dev->ib_dev.query_device = pvrdma_query_device;
 203         dev->ib_dev.query_port = pvrdma_query_port;
 204         dev->ib_dev.query_gid = pvrdma_query_gid;
 205         dev->ib_dev.query_pkey = pvrdma_query_pkey;
 206         dev->ib_dev.modify_port = pvrdma_modify_port;
 207         dev->ib_dev.alloc_ucontext = pvrdma_alloc_ucontext;
 208         dev->ib_dev.dealloc_ucontext = pvrdma_dealloc_ucontext;
 209         dev->ib_dev.mmap = pvrdma_mmap;
 210         dev->ib_dev.alloc_pd = pvrdma_alloc_pd;
 211         dev->ib_dev.dealloc_pd = pvrdma_dealloc_pd;
 212         dev->ib_dev.create_ah = pvrdma_create_ah;
 213         dev->ib_dev.destroy_ah = pvrdma_destroy_ah;
 214         dev->ib_dev.create_qp = pvrdma_create_qp;
 215         dev->ib_dev.modify_qp = pvrdma_modify_qp;
 216         dev->ib_dev.query_qp = pvrdma_query_qp;
 217         dev->ib_dev.destroy_qp = pvrdma_destroy_qp;
 218         dev->ib_dev.post_send = pvrdma_post_send;
 219         dev->ib_dev.post_recv = pvrdma_post_recv;
 220         dev->ib_dev.create_cq = pvrdma_create_cq;
 221         dev->ib_dev.modify_cq = pvrdma_modify_cq;
 222         dev->ib_dev.resize_cq = pvrdma_resize_cq;
 223         dev->ib_dev.destroy_cq = pvrdma_destroy_cq;
 224         dev->ib_dev.poll_cq = pvrdma_poll_cq;
 225         dev->ib_dev.req_notify_cq = pvrdma_req_notify_cq;
 226         dev->ib_dev.get_dma_mr = pvrdma_get_dma_mr;
 227         dev->ib_dev.reg_user_mr = pvrdma_reg_user_mr;
 228         dev->ib_dev.dereg_mr = pvrdma_dereg_mr;
 229         dev->ib_dev.alloc_mr = pvrdma_alloc_mr;
 230         dev->ib_dev.map_mr_sg = pvrdma_map_mr_sg;
 231         dev->ib_dev.add_gid = pvrdma_add_gid;
 232         dev->ib_dev.del_gid = pvrdma_del_gid;
 233         dev->ib_dev.get_netdev = pvrdma_get_netdev;
 234         dev->ib_dev.get_port_immutable = pvrdma_port_immutable;
 235         dev->ib_dev.get_link_layer = pvrdma_port_link_layer;
 236         dev->ib_dev.get_dev_fw_str = pvrdma_get_fw_ver_str;
 237
 238         mutex_init(&dev->port_mutex);
 239         spin_lock_init(&dev->desc_lock);
 240
 241         dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(void *),
 242                               GFP_KERNEL);
 243         if (!dev->cq_tbl)
 244                 return ret;
 245         spin_lock_init(&dev->cq_tbl_lock);
 246
 247         dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(void *),
 248                               GFP_KERNEL);
 249         if (!dev->qp_tbl)
 250                 goto err_cq_free;
 251         spin_lock_init(&dev->qp_tbl_lock);
 252
 253         ret = ib_register_device(&dev->ib_dev, NULL);
 254         if (ret)
 255                 goto err_qp_free;
 256
 257         for (i = 0; i < ARRAY_SIZE(pvrdma_class_attributes); ++i) {
 258                 ret = device_create_file(&dev->ib_dev.dev,
 259                                          pvrdma_class_attributes[i]);
 260                 if (ret)
 261                         goto err_class;
 262         }
 263
 264         dev->ib_active = true;
 265
 266         return 0;
 267
 268 err_class:
 269         ib_unregister_device(&dev->ib_dev);
 270 err_qp_free:
 271         kfree(dev->qp_tbl);
 272 err_cq_free:
 273         kfree(dev->cq_tbl);
 274
 275         return ret;
 276 }
 277
 278 static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
 279 {
 280         u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
 281         struct pvrdma_dev *dev = dev_id;
 282
 283         dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
 284
 285         if (dev->intr.type != PVRDMA_INTR_TYPE_MSIX) {
 286                 /* Legacy intr */
 287                 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
 288                 if (icr == 0)
 289                         return IRQ_NONE;
 290         }
 291
 292         if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
 293                 complete(&dev->cmd_done);
 294
 295         return IRQ_HANDLED;
 296 }
 297
 298 static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
 299 {
 300         struct pvrdma_qp *qp;
 301         unsigned long flags;
 302
 303         spin_lock_irqsave(&dev->qp_tbl_lock, flags);
 304         qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
 305         if (qp)
 306                 atomic_inc(&qp->refcnt);
 307         spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
 308
 309         if (qp && qp->ibqp.event_handler) {
 310                 struct ib_qp *ibqp = &qp->ibqp;
 311                 struct ib_event e;
 312
 313                 e.device = ibqp->device;
 314                 e.element.qp = ibqp;
 315                 e.event = type; /* 1:1 mapping for now. */
 316                 ibqp->event_handler(&e, ibqp->qp_context);
 317         }
 318         if (qp) {
 319                 atomic_dec(&qp->refcnt);
 320                 if (atomic_read(&qp->refcnt) == 0)
 321                         wake_up(&qp->wait);
 322         }
 323 }
 324
 325 static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
 326 {
 327         struct pvrdma_cq *cq;
 328         unsigned long flags;
 329
 330         spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 331         cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
 332         if (cq)
 333                 atomic_inc(&cq->refcnt);
 334         spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 335
 336         if (cq && cq->ibcq.event_handler) {
 337                 struct ib_cq *ibcq = &cq->ibcq;
 338                 struct ib_event e;
 339
 340                 e.device = ibcq->device;
 341                 e.element.cq = ibcq;
 342                 e.event = type; /* 1:1 mapping for now. */
 343                 ibcq->event_handler(&e, ibcq->cq_context);
 344         }
 345         if (cq) {
 346                 atomic_dec(&cq->refcnt);
 347                 if (atomic_read(&cq->refcnt) == 0)
 348                         wake_up(&cq->wait);
 349         }
 350 }
 351
 352 static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
 353                                   enum ib_event_type event)
 354 {
 355         struct ib_event ib_event;
 356
 357         memset(&ib_event, 0, sizeof(ib_event));
 358         ib_event.device = &dev->ib_dev;
 359         ib_event.element.port_num = port;
 360         ib_event.event = event;
 361         ib_dispatch_event(&ib_event);
 362 }
 363
 364 static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
 365 {
 366         if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
 367                 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
 368                 return;
 369         }
 370
 371         pvrdma_dispatch_event(dev, port, type);
 372 }
 373
 374 static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
 375 {
 376         return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
 377                                         &dev->async_pdir,
 378                                         PAGE_SIZE +
 379                                         sizeof(struct pvrdma_eqe) * i);
 380 }
 381
 382 static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
 383 {
 384         struct pvrdma_dev *dev = dev_id;
 385         struct pvrdma_ring *ring = &dev->async_ring_state->rx;
 386         int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
 387                          PAGE_SIZE / sizeof(struct pvrdma_eqe);
 388         unsigned int head;
 389
 390         dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
 391
 392         /*
 393          * Don't process events until the IB device is registered. Otherwise
 394          * we'll try to ib_dispatch_event() on an invalid device.
 395          */
 396         if (!dev->ib_active)
 397                 return IRQ_HANDLED;
 398
 399         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 400                 struct pvrdma_eqe *eqe;
 401
 402                 eqe = get_eqe(dev, head);
 403
 404                 switch (eqe->type) {
 405                 case PVRDMA_EVENT_QP_FATAL:
 406                 case PVRDMA_EVENT_QP_REQ_ERR:
 407                 case PVRDMA_EVENT_QP_ACCESS_ERR:
 408                 case PVRDMA_EVENT_COMM_EST:
 409                 case PVRDMA_EVENT_SQ_DRAINED:
 410                 case PVRDMA_EVENT_PATH_MIG:
 411                 case PVRDMA_EVENT_PATH_MIG_ERR:
 412                 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
 413                         pvrdma_qp_event(dev, eqe->info, eqe->type);
 414                         break;
 415
 416                 case PVRDMA_EVENT_CQ_ERR:
 417                         pvrdma_cq_event(dev, eqe->info, eqe->type);
 418                         break;
 419
 420                 case PVRDMA_EVENT_SRQ_ERR:
 421                 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
 422                         break;
 423
 424                 case PVRDMA_EVENT_PORT_ACTIVE:
 425                 case PVRDMA_EVENT_PORT_ERR:
 426                 case PVRDMA_EVENT_LID_CHANGE:
 427                 case PVRDMA_EVENT_PKEY_CHANGE:
 428                 case PVRDMA_EVENT_SM_CHANGE:
 429                 case PVRDMA_EVENT_CLIENT_REREGISTER:
 430                 case PVRDMA_EVENT_GID_CHANGE:
 431                         pvrdma_dev_event(dev, eqe->info, eqe->type);
 432                         break;
 433
 434                 case PVRDMA_EVENT_DEVICE_FATAL:
 435                         pvrdma_dev_event(dev, 1, eqe->type);
 436                         break;
 437
 438                 default:
 439                         break;
 440                 }
 441
 442                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 443         }
 444
 445         return IRQ_HANDLED;
 446 }
 447
 448 static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
 449                                            unsigned int i)
 450 {
 451         return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
 452                                         &dev->cq_pdir,
 453                                         PAGE_SIZE +
 454                                         sizeof(struct pvrdma_cqne) * i);
 455 }
 456
 457 static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
 458 {
 459         struct pvrdma_dev *dev = dev_id;
 460         struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
 461         int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
 462                          sizeof(struct pvrdma_cqne);
 463         unsigned int head;
 464         unsigned long flags;
 465
 466         dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
 467
 468         while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 469                 struct pvrdma_cqne *cqne;
 470                 struct pvrdma_cq *cq;
 471
 472                 cqne = get_cqne(dev, head);
 473                 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 474                 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
 475                 if (cq)
 476                         atomic_inc(&cq->refcnt);
 477                 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 478
 479                 if (cq && cq->ibcq.comp_handler)
 480                         cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
 481                 if (cq) {
 482                         atomic_dec(&cq->refcnt);
 483                         if (atomic_read(&cq->refcnt))
 484                                 wake_up(&cq->wait);
 485                 }
 486                 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 487         }
 488
 489         return IRQ_HANDLED;
 490 }
 491
 492 static void pvrdma_disable_msi_all(struct pvrdma_dev *dev)
 493 {
 494         if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX)
 495                 pci_disable_msix(dev->pdev);
 496         else if (dev->intr.type == PVRDMA_INTR_TYPE_MSI)
 497                 pci_disable_msi(dev->pdev);
 498 }
 499
 500 static void pvrdma_free_irq(struct pvrdma_dev *dev)
 501 {
 502         int i;
 503
 504         dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
 505
 506         if (dev->intr.type == PVRDMA_INTR_TYPE_MSIX) {
 507                 for (i = 0; i < dev->intr.size; i++) {
 508                         if (dev->intr.enabled[i]) {
 509                                 free_irq(dev->intr.msix_entry[i].vector, dev);
 510                                 dev->intr.enabled[i] = 0;
 511                         }
 512                 }
 513         } else if (dev->intr.type == PVRDMA_INTR_TYPE_INTX ||
 514                    dev->intr.type == PVRDMA_INTR_TYPE_MSI) {
 515                 free_irq(dev->pdev->irq, dev);
 516         }
 517 }
 518
 519 static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
 520 {
 521         dev_dbg(&dev->pdev->dev, "enable interrupts\n");
 522         pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
 523 }
 524
 525 static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
 526 {
 527         dev_dbg(&dev->pdev->dev, "disable interrupts\n");
 528         pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
 529 }
 530
 531 static int pvrdma_enable_msix(struct pci_dev *pdev, struct pvrdma_dev *dev)
 532 {
 533         int i;
 534         int ret;
 535
 536         for (i = 0; i < PVRDMA_MAX_INTERRUPTS; i++) {
 537                 dev->intr.msix_entry[i].entry = i;
 538                 dev->intr.msix_entry[i].vector = i;
 539
 540                 switch (i) {
 541                 case 0:
 542                         /* CMD ring handler */
 543                         dev->intr.handler[i] = pvrdma_intr0_handler;
 544                         break;
 545                 case 1:
 546                         /* Async event ring handler */
 547                         dev->intr.handler[i] = pvrdma_intr1_handler;
 548                         break;
 549                 default:
 550                         /* Completion queue handler */
 551                         dev->intr.handler[i] = pvrdma_intrx_handler;
 552                         break;
 553                 }
 554         }
 555
 556         ret = pci_enable_msix(pdev, dev->intr.msix_entry,
 557                               PVRDMA_MAX_INTERRUPTS);
 558         if (!ret) {
 559                 dev->intr.type = PVRDMA_INTR_TYPE_MSIX;
 560                 dev->intr.size = PVRDMA_MAX_INTERRUPTS;
 561         } else if (ret > 0) {
 562                 ret = pci_enable_msix(pdev, dev->intr.msix_entry, ret);
 563                 if (!ret) {
 564                         dev->intr.type = PVRDMA_INTR_TYPE_MSIX;
 565                         dev->intr.size = ret;
 566                 } else {
 567                         dev->intr.size = 0;
 568                 }
 569         }
 570
 571         dev_dbg(&pdev->dev, "using interrupt type %d, size %d\n",
 572                 dev->intr.type, dev->intr.size);
 573
 574         return ret;
 575 }
 576
 577 static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
 578 {
 579         int ret = 0;
 580         int i;
 581
 582         if (pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX) &&
 583             pvrdma_enable_msix(dev->pdev, dev)) {
 584                 /* Try MSI */
 585                 ret = pci_enable_msi(dev->pdev);
 586                 if (!ret) {
 587                         dev->intr.type = PVRDMA_INTR_TYPE_MSI;
 588                 } else {
 589                         /* Legacy INTR */
 590                         dev->intr.type = PVRDMA_INTR_TYPE_INTX;
 591                 }
 592         }
 593
 594         /* Request First IRQ */
 595         switch (dev->intr.type) {
 596         case PVRDMA_INTR_TYPE_INTX:
 597         case PVRDMA_INTR_TYPE_MSI:
 598                 ret = request_irq(dev->pdev->irq, pvrdma_intr0_handler,
 599                                   IRQF_SHARED, DRV_NAME, dev);
 600                 if (ret) {
 601                         dev_err(&dev->pdev->dev,
 602                                 "failed to request interrupt\n");
 603                         goto disable_msi;
 604                 }
 605                 break;
 606         case PVRDMA_INTR_TYPE_MSIX:
 607                 ret = request_irq(dev->intr.msix_entry[0].vector,
 608                                   pvrdma_intr0_handler, 0, DRV_NAME, dev);
 609                 if (ret) {
 610                         dev_err(&dev->pdev->dev,
 611                                 "failed to request interrupt 0\n");
 612                         goto disable_msi;
 613                 }
 614                 dev->intr.enabled[0] = 1;
 615                 break;
 616         default:
 617                 /* Not reached */
 618                 break;
 619         }
 620
 621         /* For MSIX: request intr for each vector */
 622         if (dev->intr.size > 1) {
 623                 ret = request_irq(dev->intr.msix_entry[1].vector,
 624                                   pvrdma_intr1_handler, 0, DRV_NAME, dev);
 625                 if (ret) {
 626                         dev_err(&dev->pdev->dev,
 627                                 "failed to request interrupt 1\n");
 628                         goto free_irq;
 629                 }
 630                 dev->intr.enabled[1] = 1;
 631
 632                 for (i = 2; i < dev->intr.size; i++) {
 633                         ret = request_irq(dev->intr.msix_entry[i].vector,
 634                                           pvrdma_intrx_handler, 0,
 635                                           DRV_NAME, dev);
 636                         if (ret) {
 637                                 dev_err(&dev->pdev->dev,
 638                                         "failed to request interrupt %d\n", i);
 639                                 goto free_irq;
 640                         }
 641                         dev->intr.enabled[i] = 1;
 642                 }
 643         }
 644
 645         return 0;
 646
 647 free_irq:
 648         pvrdma_free_irq(dev);
 649 disable_msi:
 650         pvrdma_disable_msi_all(dev);
 651         return ret;
 652 }
 653
 654 static void pvrdma_free_slots(struct pvrdma_dev *dev)
 655 {
 656         struct pci_dev *pdev = dev->pdev;
 657
 658         if (dev->resp_slot)
 659                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
 660                                   dev->dsr->resp_slot_dma);
 661         if (dev->cmd_slot)
 662                 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
 663                                   dev->dsr->cmd_slot_dma);
 664 }
 665
 666 static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
 667                                    const union ib_gid *gid,
 668                                    int index)
 669 {
 670         int ret;
 671         union pvrdma_cmd_req req;
 672         struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
 673
 674         if (!dev->sgid_tbl) {
 675                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 676                 return -EINVAL;
 677         }
 678
 679         memset(cmd_bind, 0, sizeof(*cmd_bind));
 680         cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
 681         memcpy(cmd_bind->new_gid, gid->raw, 16);
 682         cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
 683         cmd_bind->vlan = 0xfff;
 684         cmd_bind->index = index;
 685         cmd_bind->gid_type = PVRDMA_GID_TYPE_FLAG_ROCE_V1;
 686
 687         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 688         if (ret < 0) {
 689                 dev_warn(&dev->pdev->dev,
 690                          "could not create binding, error: %d\n", ret);
 691                 return -EFAULT;
 692         }
 693         memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
 694         return 0;
 695 }
 696
 697 static int pvrdma_add_gid(struct ib_device *ibdev,
 698                           u8 port_num,
 699                           unsigned int index,
 700                           const union ib_gid *gid,
 701                           const struct ib_gid_attr *attr,
 702                           void **context)
 703 {
 704         struct pvrdma_dev *dev = to_vdev(ibdev);
 705
 706         return pvrdma_add_gid_at_index(dev, gid, index);
 707 }
 708
 709 static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
 710 {
 711         int ret;
 712         union pvrdma_cmd_req req;
 713         struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
 714
 715         /* Update sgid table. */
 716         if (!dev->sgid_tbl) {
 717                 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 718                 return -EINVAL;
 719         }
 720
 721         memset(cmd_dest, 0, sizeof(*cmd_dest));
 722         cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
 723         memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
 724         cmd_dest->index = index;
 725
 726         ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 727         if (ret < 0) {
 728                 dev_warn(&dev->pdev->dev,
 729                          "could not destroy binding, error: %d\n", ret);
 730                 return ret;
 731         }
 732         memset(&dev->sgid_tbl[index], 0, 16);
 733         return 0;
 734 }
 735
 736 static int pvrdma_del_gid(struct ib_device *ibdev,
 737                           u8 port_num,
 738                           unsigned int index,
 739                           void **context)
 740 {
 741         struct pvrdma_dev *dev = to_vdev(ibdev);
 742
 743         dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
 744                 index, dev->netdev->name);
 745
 746         return pvrdma_del_gid_at_index(dev, index);
 747 }
 748
 749 static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 750                                           unsigned long event)
 751 {
 752         switch (event) {
 753         case NETDEV_REBOOT:
 754         case NETDEV_DOWN:
 755                 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 756                 break;
 757         case NETDEV_UP:
 758                 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 759                 break;
 760         default:
 761                 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
 762                         event, dev->ib_dev.name);
 763                 break;
 764         }
 765 }
 766
 767 static void pvrdma_netdevice_event_work(struct work_struct *work)
 768 {
 769         struct pvrdma_netdevice_work *netdev_work;
 770         struct pvrdma_dev *dev;
 771
 772         netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
 773
 774         mutex_lock(&pvrdma_device_list_lock);
 775         list_for_each_entry(dev, &pvrdma_device_list, device_link) {
 776                 if (dev->netdev == netdev_work->event_netdev) {
 777                         pvrdma_netdevice_event_handle(dev, netdev_work->event);
 778                         break;
 779                 }
 780         }
 781         mutex_unlock(&pvrdma_device_list_lock);
 782
 783         kfree(netdev_work);
 784 }
 785
 786 static int pvrdma_netdevice_event(struct notifier_block *this,
 787                                   unsigned long event, void *ptr)
 788 {
 789         struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
 790         struct pvrdma_netdevice_work *netdev_work;
 791
 792         netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
 793         if (!netdev_work)
 794                 return NOTIFY_BAD;
 795
 796         INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
 797         netdev_work->event_netdev = event_netdev;
 798         netdev_work->event = event;
 799         queue_work(event_wq, &netdev_work->work);
 800
 801         return NOTIFY_DONE;
 802 }
 803
 804 static int pvrdma_pci_probe(struct pci_dev *pdev,
 805                             const struct pci_device_id *id)
 806 {
 807         struct pci_dev *pdev_net;
 808         struct pvrdma_dev *dev;
 809         int ret;
 810         unsigned long start;
 811         unsigned long len;
 812         unsigned int version;
 813         dma_addr_t slot_dma = 0;
 814
 815         dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
 816
 817         /* Allocate zero-out device */
 818         dev = (struct pvrdma_dev *)ib_alloc_device(sizeof(*dev));
 819         if (!dev) {
 820                 dev_err(&pdev->dev, "failed to allocate IB device\n");
 821                 return -ENOMEM;
 822         }
 823
 824         mutex_lock(&pvrdma_device_list_lock);
 825         list_add(&dev->device_link, &pvrdma_device_list);
 826         mutex_unlock(&pvrdma_device_list_lock);
 827
 828         ret = pvrdma_init_device(dev);
 829         if (ret)
 830                 goto err_free_device;
 831
 832         dev->pdev = pdev;
 833         pci_set_drvdata(pdev, dev);
 834
 835         ret = pci_enable_device(pdev);
 836         if (ret) {
 837                 dev_err(&pdev->dev, "cannot enable PCI device\n");
 838                 goto err_free_device;
 839         }
 840
 841         dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
 842                 pci_resource_flags(pdev, 0));
 843         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 844                 (unsigned long long)pci_resource_len(pdev, 0));
 845         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 846                 (unsigned long long)pci_resource_start(pdev, 0));
 847         dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
 848                 pci_resource_flags(pdev, 1));
 849         dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 850                 (unsigned long long)pci_resource_len(pdev, 1));
 851         dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 852                 (unsigned long long)pci_resource_start(pdev, 1));
 853
 854         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
 855             !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 856                 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
 857                 ret = -ENOMEM;
 858                 goto err_free_device;
 859         }
 860
 861         ret = pci_request_regions(pdev, DRV_NAME);
 862         if (ret) {
 863                 dev_err(&pdev->dev, "cannot request PCI resources\n");
 864                 goto err_disable_pdev;
 865         }
 866
 867         /* Enable 64-Bit DMA */
 868         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
 869                 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 870                 if (ret != 0) {
 871                         dev_err(&pdev->dev,
 872                                 "pci_set_consistent_dma_mask failed\n");
 873                         goto err_free_resource;
 874                 }
 875         } else {
 876                 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 877                 if (ret != 0) {
 878                         dev_err(&pdev->dev,
 879                                 "pci_set_dma_mask failed\n");
 880                         goto err_free_resource;
 881                 }
 882         }
 883
 884         pci_set_master(pdev);
 885
 886         /* Map register space */
 887         start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 888         len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 889         dev->regs = ioremap(start, len);
 890         if (!dev->regs) {
 891                 dev_err(&pdev->dev, "register mapping failed\n");
 892                 ret = -ENOMEM;
 893                 goto err_free_resource;
 894         }
 895
 896         /* Setup per-device UAR. */
 897         dev->driver_uar.index = 0;
 898         dev->driver_uar.pfn =
 899                 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
 900                 PAGE_SHIFT;
 901         dev->driver_uar.map =
 902                 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 903         if (!dev->driver_uar.map) {
 904                 dev_err(&pdev->dev, "failed to remap UAR pages\n");
 905                 ret = -ENOMEM;
 906                 goto err_unmap_regs;
 907         }
 908
 909         version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
 910         dev_info(&pdev->dev, "device version %d, driver version %d\n",
 911                  version, PVRDMA_VERSION);
 912         if (version < PVRDMA_VERSION) {
 913                 dev_err(&pdev->dev, "incompatible device version\n");
 914                 goto err_uar_unmap;
 915         }
 916
 917         dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
 918                                       &dev->dsrbase, GFP_KERNEL);
 919         if (!dev->dsr) {
 920                 dev_err(&pdev->dev, "failed to allocate shared region\n");
 921                 ret = -ENOMEM;
 922                 goto err_uar_unmap;
 923         }
 924
 925         /* Setup the shared region */
 926         memset(dev->dsr, 0, sizeof(*dev->dsr));
 927         dev->dsr->driver_version = PVRDMA_VERSION;
 928         dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 929                 PVRDMA_GOS_BITS_32 :
 930                 PVRDMA_GOS_BITS_64;
 931         dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
 932         dev->dsr->gos_info.gos_ver = 1;
 933         dev->dsr->uar_pfn = dev->driver_uar.pfn;
 934
 935         /* Command slot. */
 936         dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 937                                            &slot_dma, GFP_KERNEL);
 938         if (!dev->cmd_slot) {
 939                 ret = -ENOMEM;
 940                 goto err_free_dsr;
 941         }
 942
 943         dev->dsr->cmd_slot_dma = (u64)slot_dma;
 944
 945         /* Response slot. */
 946         dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 947                                             &slot_dma, GFP_KERNEL);
 948         if (!dev->resp_slot) {
 949                 ret = -ENOMEM;
 950                 goto err_free_slots;
 951         }
 952
 953         dev->dsr->resp_slot_dma = (u64)slot_dma;
 954
 955         /* Async event ring */
 956         dev->dsr->async_ring_pages.num_pages = 4;
 957         ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
 958                                    dev->dsr->async_ring_pages.num_pages, true);
 959         if (ret)
 960                 goto err_free_slots;
 961         dev->async_ring_state = dev->async_pdir.pages[0];
 962         dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
 963
 964         /* CQ notification ring */
 965         dev->dsr->cq_ring_pages.num_pages = 4;
 966         ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
 967                                    dev->dsr->cq_ring_pages.num_pages, true);
 968         if (ret)
 969                 goto err_free_async_ring;
 970         dev->cq_ring_state = dev->cq_pdir.pages[0];
 971         dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
 972
 973         /*
 974          * Write the PA of the shared region to the device. The writes must be
 975          * ordered such that the high bits are written last. When the writes
 976          * complete, the device will have filled out the capabilities.
 977          */
 978
 979         pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
 980         pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
 981                          (u32)((u64)(dev->dsrbase) >> 32));
 982
 983         /* Make sure the write is complete before reading status. */
 984         mb();
 985
 986         /* Currently, the driver only supports RoCE mode. */
 987         if (dev->dsr->caps.mode != PVRDMA_DEVICE_MODE_ROCE) {
 988                 dev_err(&pdev->dev, "unsupported transport %d\n",
 989                         dev->dsr->caps.mode);
 990                 ret = -EFAULT;
 991                 goto err_free_cq_ring;
 992         }
 993
 994         /* Currently, the driver only supports RoCE V1. */
 995         if (!(dev->dsr->caps.gid_types & PVRDMA_GID_TYPE_FLAG_ROCE_V1)) {
 996                 dev_err(&pdev->dev, "driver needs RoCE v1 support\n");
 997                 ret = -EFAULT;
 998                 goto err_free_cq_ring;
 999         }
1000
1001         /* Paired vmxnet3 will have same bus, slot. But func will be 0 */
1002         pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
1003         if (!pdev_net) {
1004                 dev_err(&pdev->dev, "failed to find paired net device\n");
1005                 ret = -ENODEV;
1006                 goto err_free_cq_ring;
1007         }
1008
1009         if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
1010             pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
1011                 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
1012                 pci_dev_put(pdev_net);
1013                 ret = -ENODEV;
1014                 goto err_free_cq_ring;
1015         }
1016
1017         dev->netdev = pci_get_drvdata(pdev_net);
1018         pci_dev_put(pdev_net);
1019         if (!dev->netdev) {
1020                 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
1021                 ret = -ENODEV;
1022                 goto err_free_cq_ring;
1023         }
1024
1025         dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
1026
1027         /* Interrupt setup */
1028         ret = pvrdma_alloc_intrs(dev);
1029         if (ret) {
1030                 dev_err(&pdev->dev, "failed to allocate interrupts\n");
1031                 ret = -ENOMEM;
1032                 goto err_netdevice;
1033         }
1034
1035         /* Allocate UAR table. */
1036         ret = pvrdma_uar_table_init(dev);
1037         if (ret) {
1038                 dev_err(&pdev->dev, "failed to allocate UAR table\n");
1039                 ret = -ENOMEM;
1040                 goto err_free_intrs;
1041         }
1042
1043         /* Allocate GID table */
1044         dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
1045                                 sizeof(union ib_gid), GFP_KERNEL);
1046         if (!dev->sgid_tbl) {
1047                 ret = -ENOMEM;
1048                 goto err_free_uar_table;
1049         }
1050         dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
1051
1052         pvrdma_enable_intrs(dev);
1053
1054         /* Activate pvrdma device */
1055         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
1056
1057         /* Make sure the write is complete before reading status. */
1058         mb();
1059
1060         /* Check if device was successfully activated */
1061         ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
1062         if (ret != 0) {
1063                 dev_err(&pdev->dev, "failed to activate device\n");
1064                 ret = -EFAULT;
1065                 goto err_disable_intr;
1066         }
1067
1068         /* Register IB device */
1069         ret = pvrdma_register_device(dev);
1070         if (ret) {
1071                 dev_err(&pdev->dev, "failed to register IB device\n");
1072                 goto err_disable_intr;
1073         }
1074
1075         dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1076         ret = register_netdevice_notifier(&dev->nb_netdev);
1077         if (ret) {
1078                 dev_err(&pdev->dev, "failed to register netdevice events\n");
1079                 goto err_unreg_ibdev;
1080         }
1081
1082         dev_info(&pdev->dev, "attached to device\n");
1083         return 0;
1084
1085 err_unreg_ibdev:
1086         ib_unregister_device(&dev->ib_dev);
1087 err_disable_intr:
1088         pvrdma_disable_intrs(dev);
1089         kfree(dev->sgid_tbl);
1090 err_free_uar_table:
1091         pvrdma_uar_table_cleanup(dev);
1092 err_free_intrs:
1093         pvrdma_free_irq(dev);
1094         pvrdma_disable_msi_all(dev);
1095 err_netdevice:
1096         unregister_netdevice_notifier(&dev->nb_netdev);
1097 err_free_cq_ring:
1098         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1099 err_free_async_ring:
1100         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1101 err_free_slots:
1102         pvrdma_free_slots(dev);
1103 err_free_dsr:
1104         dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1105                           dev->dsrbase);
1106 err_uar_unmap:
1107         iounmap(dev->driver_uar.map);
1108 err_unmap_regs:
1109         iounmap(dev->regs);
1110 err_free_resource:
1111         pci_release_regions(pdev);
1112 err_disable_pdev:
1113         pci_disable_device(pdev);
1114         pci_set_drvdata(pdev, NULL);
1115 err_free_device:
1116         mutex_lock(&pvrdma_device_list_lock);
1117         list_del(&dev->device_link);
1118         mutex_unlock(&pvrdma_device_list_lock);
1119         ib_dealloc_device(&dev->ib_dev);
1120         return ret;
1121 }
1122
1123 static void pvrdma_pci_remove(struct pci_dev *pdev)
1124 {
1125         struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1126
1127         if (!dev)
1128                 return;
1129
1130         dev_info(&pdev->dev, "detaching from device\n");
1131
1132         unregister_netdevice_notifier(&dev->nb_netdev);
1133         dev->nb_netdev.notifier_call = NULL;
1134
1135         flush_workqueue(event_wq);
1136
1137         /* Unregister ib device */
1138         ib_unregister_device(&dev->ib_dev);
1139
1140         mutex_lock(&pvrdma_device_list_lock);
1141         list_del(&dev->device_link);
1142         mutex_unlock(&pvrdma_device_list_lock);
1143
1144         pvrdma_disable_intrs(dev);
1145         pvrdma_free_irq(dev);
1146         pvrdma_disable_msi_all(dev);
1147
1148         /* Deactivate pvrdma device */
1149         pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1150         pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1151         pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1152         pvrdma_free_slots(dev);
1153
1154         iounmap(dev->regs);
1155         kfree(dev->sgid_tbl);
1156         kfree(dev->cq_tbl);
1157         kfree(dev->qp_tbl);
1158         pvrdma_uar_table_cleanup(dev);
1159         iounmap(dev->driver_uar.map);
1160
1161         ib_dealloc_device(&dev->ib_dev);
1162
1163         /* Free pci resources */
1164         pci_release_regions(pdev);
1165         pci_disable_device(pdev);
1166         pci_set_drvdata(pdev, NULL);
1167 }
1168
1169 static struct pci_device_id pvrdma_pci_table[] = {
1170         { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1171         { 0 },
1172 };
1173
1174 MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1175
1176 static struct pci_driver pvrdma_driver = {
1177         .name           = DRV_NAME,
1178         .id_table       = pvrdma_pci_table,
1179         .probe          = pvrdma_pci_probe,
1180         .remove         = pvrdma_pci_remove,
1181 };
1182
1183 static int __init pvrdma_init(void)
1184 {
1185         int err;
1186
1187         event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1188         if (!event_wq)
1189                 return -ENOMEM;
1190
1191         err = pci_register_driver(&pvrdma_driver);
1192         if (err)
1193                 destroy_workqueue(event_wq);
1194
1195         return err;
1196 }
1197
1198 static void __exit pvrdma_cleanup(void)
1199 {
1200         pci_unregister_driver(&pvrdma_driver);
1201
1202         destroy_workqueue(event_wq);
1203 }
1204
1205 module_init(pvrdma_init);
1206 module_exit(pvrdma_cleanup);
1207
1208 MODULE_AUTHOR("VMware, Inc");
1209 MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1210 MODULE_VERSION(DRV_VERSION);
1211 MODULE_LICENSE("Dual BSD/GPL");