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
  61static DEFINE_MUTEX(pvrdma_device_list_lock);
  62static LIST_HEAD(pvrdma_device_list);
  63static struct workqueue_struct *event_wq;
  64
  65static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context);
  66static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context);
  67
  68static ssize_t hca_type_show(struct device *device,
  69			     struct device_attribute *attr, char *buf)
  70{
  71	return sysfs_emit(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
  72}
  73static DEVICE_ATTR_RO(hca_type);
  74
  75static ssize_t hw_rev_show(struct device *device,
  76			   struct device_attribute *attr, char *buf)
  77{
  78	return sysfs_emit(buf, "%d\n", PVRDMA_REV_ID);
  79}
  80static DEVICE_ATTR_RO(hw_rev);
  81
  82static ssize_t board_id_show(struct device *device,
  83			     struct device_attribute *attr, char *buf)
  84{
  85	return sysfs_emit(buf, "%d\n", PVRDMA_BOARD_ID);
  86}
  87static DEVICE_ATTR_RO(board_id);
  88
  89static struct attribute *pvrdma_class_attributes[] = {
  90	&dev_attr_hw_rev.attr,
  91	&dev_attr_hca_type.attr,
  92	&dev_attr_board_id.attr,
  93	NULL,
  94};
  95
  96static const struct attribute_group pvrdma_attr_group = {
  97	.attrs = pvrdma_class_attributes,
  98};
  99
 100static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str)
 101{
 102	struct pvrdma_dev *dev =
 103		container_of(device, struct pvrdma_dev, ib_dev);
 104	snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n",
 105		 (int) (dev->dsr->caps.fw_ver >> 32),
 106		 (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
 107		 (int) dev->dsr->caps.fw_ver & 0xffff);
 108}
 109
 110static int pvrdma_init_device(struct pvrdma_dev *dev)
 111{
 112	/*  Initialize some device related stuff */
 113	spin_lock_init(&dev->cmd_lock);
 114	sema_init(&dev->cmd_sema, 1);
 115	atomic_set(&dev->num_qps, 0);
 116	atomic_set(&dev->num_srqs, 0);
 117	atomic_set(&dev->num_cqs, 0);
 118	atomic_set(&dev->num_pds, 0);
 119	atomic_set(&dev->num_ahs, 0);
 120
 121	return 0;
 122}
 123
 124static int pvrdma_port_immutable(struct ib_device *ibdev, u32 port_num,
 125				 struct ib_port_immutable *immutable)
 126{
 127	struct pvrdma_dev *dev = to_vdev(ibdev);
 128	struct ib_port_attr attr;
 129	int err;
 130
 131	if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V1)
 132		immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE;
 133	else if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V2)
 134		immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
 135
 136	err = ib_query_port(ibdev, port_num, &attr);
 137	if (err)
 138		return err;
 139
 140	immutable->pkey_tbl_len = attr.pkey_tbl_len;
 141	immutable->gid_tbl_len = attr.gid_tbl_len;
 142	immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 143	return 0;
 144}
 145
 146static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
 147				  enum ib_event_type event)
 148{
 149	struct ib_event ib_event;
 150
 151	memset(&ib_event, 0, sizeof(ib_event));
 152	ib_event.device = &dev->ib_dev;
 153	ib_event.element.port_num = port;
 154	ib_event.event = event;
 155	ib_dispatch_event(&ib_event);
 156}
 157
 158static void pvrdma_report_event_handle(struct ib_device *ibdev,
 159				       struct net_device *ndev,
 160				       unsigned long event)
 161{
 162	struct pvrdma_dev *dev = container_of(ibdev, struct pvrdma_dev, ib_dev);
 163
 164	switch (event) {
 165	case NETDEV_DOWN:
 166		pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 167		break;
 168	case NETDEV_UP:
 169		pvrdma_write_reg(dev, PVRDMA_REG_CTL,
 170				 PVRDMA_DEVICE_CTL_UNQUIESCE);
 171
 172		mb();
 173
 174		if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
 175			dev_err(&dev->pdev->dev,
 176				"failed to activate device during link up\n");
 177		else
 178			pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
 179		break;
 180
 181	default:
 182		break;
 183	}
 184}
 185
 186static const struct ib_device_ops pvrdma_dev_ops = {
 187	.owner = THIS_MODULE,
 188	.driver_id = RDMA_DRIVER_VMW_PVRDMA,
 189	.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION,
 190
 191	.add_gid = pvrdma_add_gid,
 192	.alloc_mr = pvrdma_alloc_mr,
 193	.alloc_pd = pvrdma_alloc_pd,
 194	.alloc_ucontext = pvrdma_alloc_ucontext,
 195	.create_ah = pvrdma_create_ah,
 196	.create_cq = pvrdma_create_cq,
 197	.create_qp = pvrdma_create_qp,
 198	.dealloc_pd = pvrdma_dealloc_pd,
 199	.dealloc_ucontext = pvrdma_dealloc_ucontext,
 200	.del_gid = pvrdma_del_gid,
 201	.dereg_mr = pvrdma_dereg_mr,
 202	.destroy_ah = pvrdma_destroy_ah,
 203	.destroy_cq = pvrdma_destroy_cq,
 204	.destroy_qp = pvrdma_destroy_qp,
 205	.device_group = &pvrdma_attr_group,
 206	.get_dev_fw_str = pvrdma_get_fw_ver_str,
 207	.get_dma_mr = pvrdma_get_dma_mr,
 208	.get_link_layer = pvrdma_port_link_layer,
 209	.get_port_immutable = pvrdma_port_immutable,
 210	.map_mr_sg = pvrdma_map_mr_sg,
 211	.mmap = pvrdma_mmap,
 212	.modify_port = pvrdma_modify_port,
 213	.modify_qp = pvrdma_modify_qp,
 214	.poll_cq = pvrdma_poll_cq,
 215	.post_recv = pvrdma_post_recv,
 216	.post_send = pvrdma_post_send,
 217	.query_device = pvrdma_query_device,
 218	.query_gid = pvrdma_query_gid,
 219	.query_pkey = pvrdma_query_pkey,
 220	.query_port = pvrdma_query_port,
 221	.query_qp = pvrdma_query_qp,
 222	.reg_user_mr = pvrdma_reg_user_mr,
 223	.req_notify_cq = pvrdma_req_notify_cq,
 224	.report_port_event = pvrdma_report_event_handle,
 225
 226	INIT_RDMA_OBJ_SIZE(ib_ah, pvrdma_ah, ibah),
 227	INIT_RDMA_OBJ_SIZE(ib_cq, pvrdma_cq, ibcq),
 228	INIT_RDMA_OBJ_SIZE(ib_pd, pvrdma_pd, ibpd),
 229	INIT_RDMA_OBJ_SIZE(ib_qp, pvrdma_qp, ibqp),
 230	INIT_RDMA_OBJ_SIZE(ib_ucontext, pvrdma_ucontext, ibucontext),
 231};
 232
 233static const struct ib_device_ops pvrdma_dev_srq_ops = {
 234	.create_srq = pvrdma_create_srq,
 235	.destroy_srq = pvrdma_destroy_srq,
 236	.modify_srq = pvrdma_modify_srq,
 237	.query_srq = pvrdma_query_srq,
 238
 239	INIT_RDMA_OBJ_SIZE(ib_srq, pvrdma_srq, ibsrq),
 240};
 241
 242static int pvrdma_register_device(struct pvrdma_dev *dev)
 243{
 244	int ret = -1;
 245
 246	dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
 247	dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
 248	dev->flags = 0;
 249	dev->ib_dev.num_comp_vectors = 1;
 250	dev->ib_dev.dev.parent = &dev->pdev->dev;
 251
 252	dev->ib_dev.node_type = RDMA_NODE_IB_CA;
 253	dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
 254
 255	ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_ops);
 256
 257	mutex_init(&dev->port_mutex);
 258	spin_lock_init(&dev->desc_lock);
 259
 260	dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *),
 261			      GFP_KERNEL);
 262	if (!dev->cq_tbl)
 263		return ret;
 264	spin_lock_init(&dev->cq_tbl_lock);
 265
 266	dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *),
 267			      GFP_KERNEL);
 268	if (!dev->qp_tbl)
 269		goto err_cq_free;
 270	spin_lock_init(&dev->qp_tbl_lock);
 271
 272	/* Check if SRQ is supported by backend */
 273	if (dev->dsr->caps.max_srq) {
 274		ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_srq_ops);
 275
 276		dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
 277				       sizeof(struct pvrdma_srq *),
 278				       GFP_KERNEL);
 279		if (!dev->srq_tbl)
 280			goto err_qp_free;
 281	}
 282	ret = ib_device_set_netdev(&dev->ib_dev, dev->netdev, 1);
 283	if (ret)
 284		goto err_srq_free;
 285	spin_lock_init(&dev->srq_tbl_lock);
 286
 287	ret = ib_register_device(&dev->ib_dev, "vmw_pvrdma%d", &dev->pdev->dev);
 288	if (ret)
 289		goto err_srq_free;
 290
 291	dev->ib_active = true;
 292
 293	return 0;
 294
 295err_srq_free:
 296	kfree(dev->srq_tbl);
 297err_qp_free:
 298	kfree(dev->qp_tbl);
 299err_cq_free:
 300	kfree(dev->cq_tbl);
 301
 302	return ret;
 303}
 304
 305static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
 306{
 307	u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
 308	struct pvrdma_dev *dev = dev_id;
 309
 310	dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
 311
 312	if (!dev->pdev->msix_enabled) {
 313		/* Legacy intr */
 314		icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
 315		if (icr == 0)
 316			return IRQ_NONE;
 317	}
 318
 319	if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
 320		complete(&dev->cmd_done);
 321
 322	return IRQ_HANDLED;
 323}
 324
 325static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
 326{
 327	struct pvrdma_qp *qp;
 328	unsigned long flags;
 329
 330	spin_lock_irqsave(&dev->qp_tbl_lock, flags);
 331	qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
 332	if (qp)
 333		refcount_inc(&qp->refcnt);
 334	spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
 335
 336	if (qp && qp->ibqp.event_handler) {
 337		struct ib_qp *ibqp = &qp->ibqp;
 338		struct ib_event e;
 339
 340		e.device = ibqp->device;
 341		e.element.qp = ibqp;
 342		e.event = type; /* 1:1 mapping for now. */
 343		ibqp->event_handler(&e, ibqp->qp_context);
 344	}
 345	if (qp) {
 346		if (refcount_dec_and_test(&qp->refcnt))
 347			complete(&qp->free);
 348	}
 349}
 350
 351static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
 352{
 353	struct pvrdma_cq *cq;
 354	unsigned long flags;
 355
 356	spin_lock_irqsave(&dev->cq_tbl_lock, flags);
 357	cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
 358	if (cq)
 359		refcount_inc(&cq->refcnt);
 360	spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
 361
 362	if (cq && cq->ibcq.event_handler) {
 363		struct ib_cq *ibcq = &cq->ibcq;
 364		struct ib_event e;
 365
 366		e.device = ibcq->device;
 367		e.element.cq = ibcq;
 368		e.event = type; /* 1:1 mapping for now. */
 369		ibcq->event_handler(&e, ibcq->cq_context);
 370	}
 371	if (cq) {
 372		if (refcount_dec_and_test(&cq->refcnt))
 373			complete(&cq->free);
 374	}
 375}
 376
 377static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
 378{
 379	struct pvrdma_srq *srq;
 380	unsigned long flags;
 381
 382	spin_lock_irqsave(&dev->srq_tbl_lock, flags);
 383	if (dev->srq_tbl)
 384		srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
 385	else
 386		srq = NULL;
 387	if (srq)
 388		refcount_inc(&srq->refcnt);
 389	spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
 390
 391	if (srq && srq->ibsrq.event_handler) {
 392		struct ib_srq *ibsrq = &srq->ibsrq;
 393		struct ib_event e;
 394
 395		e.device = ibsrq->device;
 396		e.element.srq = ibsrq;
 397		e.event = type; /* 1:1 mapping for now. */
 398		ibsrq->event_handler(&e, ibsrq->srq_context);
 399	}
 400	if (srq) {
 401		if (refcount_dec_and_test(&srq->refcnt))
 402			complete(&srq->free);
 403	}
 404}
 405
 406static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
 407{
 408	if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
 409		dev_warn(&dev->pdev->dev, "event on port %d\n", port);
 410		return;
 411	}
 412
 413	pvrdma_dispatch_event(dev, port, type);
 414}
 415
 416static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
 417{
 418	return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
 419					&dev->async_pdir,
 420					PAGE_SIZE +
 421					sizeof(struct pvrdma_eqe) * i);
 422}
 423
 424static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
 425{
 426	struct pvrdma_dev *dev = dev_id;
 427	struct pvrdma_ring *ring = &dev->async_ring_state->rx;
 428	int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
 429			 PAGE_SIZE / sizeof(struct pvrdma_eqe);
 430	unsigned int head;
 431
 432	dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
 433
 434	/*
 435	 * Don't process events until the IB device is registered. Otherwise
 436	 * we'll try to ib_dispatch_event() on an invalid device.
 437	 */
 438	if (!dev->ib_active)
 439		return IRQ_HANDLED;
 440
 441	while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 442		struct pvrdma_eqe *eqe;
 443
 444		eqe = get_eqe(dev, head);
 445
 446		switch (eqe->type) {
 447		case PVRDMA_EVENT_QP_FATAL:
 448		case PVRDMA_EVENT_QP_REQ_ERR:
 449		case PVRDMA_EVENT_QP_ACCESS_ERR:
 450		case PVRDMA_EVENT_COMM_EST:
 451		case PVRDMA_EVENT_SQ_DRAINED:
 452		case PVRDMA_EVENT_PATH_MIG:
 453		case PVRDMA_EVENT_PATH_MIG_ERR:
 454		case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
 455			pvrdma_qp_event(dev, eqe->info, eqe->type);
 456			break;
 457
 458		case PVRDMA_EVENT_CQ_ERR:
 459			pvrdma_cq_event(dev, eqe->info, eqe->type);
 460			break;
 461
 462		case PVRDMA_EVENT_SRQ_ERR:
 463		case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
 464			pvrdma_srq_event(dev, eqe->info, eqe->type);
 465			break;
 466
 467		case PVRDMA_EVENT_PORT_ACTIVE:
 468		case PVRDMA_EVENT_PORT_ERR:
 469		case PVRDMA_EVENT_LID_CHANGE:
 470		case PVRDMA_EVENT_PKEY_CHANGE:
 471		case PVRDMA_EVENT_SM_CHANGE:
 472		case PVRDMA_EVENT_CLIENT_REREGISTER:
 473		case PVRDMA_EVENT_GID_CHANGE:
 474			pvrdma_dev_event(dev, eqe->info, eqe->type);
 475			break;
 476
 477		case PVRDMA_EVENT_DEVICE_FATAL:
 478			pvrdma_dev_event(dev, 1, eqe->type);
 479			break;
 480
 481		default:
 482			break;
 483		}
 484
 485		pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 486	}
 487
 488	return IRQ_HANDLED;
 489}
 490
 491static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
 492					   unsigned int i)
 493{
 494	return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
 495					&dev->cq_pdir,
 496					PAGE_SIZE +
 497					sizeof(struct pvrdma_cqne) * i);
 498}
 499
 500static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
 501{
 502	struct pvrdma_dev *dev = dev_id;
 503	struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
 504	int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
 505			 sizeof(struct pvrdma_cqne);
 506	unsigned int head;
 507
 508	dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
 509
 510	while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
 511		struct pvrdma_cqne *cqne;
 512		struct pvrdma_cq *cq;
 513
 514		cqne = get_cqne(dev, head);
 515		spin_lock(&dev->cq_tbl_lock);
 516		cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
 517		if (cq)
 518			refcount_inc(&cq->refcnt);
 519		spin_unlock(&dev->cq_tbl_lock);
 520
 521		if (cq && cq->ibcq.comp_handler)
 522			cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
 523		if (cq) {
 524			if (refcount_dec_and_test(&cq->refcnt))
 525				complete(&cq->free);
 526		}
 527		pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
 528	}
 529
 530	return IRQ_HANDLED;
 531}
 532
 533static void pvrdma_free_irq(struct pvrdma_dev *dev)
 534{
 535	int i;
 536
 537	dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
 538	for (i = 0; i < dev->nr_vectors; i++)
 539		free_irq(pci_irq_vector(dev->pdev, i), dev);
 540}
 541
 542static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
 543{
 544	dev_dbg(&dev->pdev->dev, "enable interrupts\n");
 545	pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
 546}
 547
 548static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
 549{
 550	dev_dbg(&dev->pdev->dev, "disable interrupts\n");
 551	pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
 552}
 553
 554static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
 555{
 556	struct pci_dev *pdev = dev->pdev;
 557	int ret = 0, i;
 558
 559	ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
 560			PCI_IRQ_MSIX);
 561	if (ret < 0) {
 562		ret = pci_alloc_irq_vectors(pdev, 1, 1,
 563				PCI_IRQ_MSI | PCI_IRQ_INTX);
 564		if (ret < 0)
 565			return ret;
 566	}
 567	dev->nr_vectors = ret;
 568
 569	ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
 570			pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
 571	if (ret) {
 572		dev_err(&dev->pdev->dev,
 573			"failed to request interrupt 0\n");
 574		goto out_free_vectors;
 575	}
 576
 577	for (i = 1; i < dev->nr_vectors; i++) {
 578		ret = request_irq(pci_irq_vector(dev->pdev, i),
 579				i == 1 ? pvrdma_intr1_handler :
 580					 pvrdma_intrx_handler,
 581				0, DRV_NAME, dev);
 582		if (ret) {
 583			dev_err(&dev->pdev->dev,
 584				"failed to request interrupt %d\n", i);
 585			goto free_irqs;
 586		}
 587	}
 588
 589	return 0;
 590
 591free_irqs:
 592	while (--i >= 0)
 593		free_irq(pci_irq_vector(dev->pdev, i), dev);
 594out_free_vectors:
 595	pci_free_irq_vectors(pdev);
 596	return ret;
 597}
 598
 599static void pvrdma_free_slots(struct pvrdma_dev *dev)
 600{
 601	struct pci_dev *pdev = dev->pdev;
 602
 603	if (dev->resp_slot)
 604		dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
 605				  dev->dsr->resp_slot_dma);
 606	if (dev->cmd_slot)
 607		dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
 608				  dev->dsr->cmd_slot_dma);
 609}
 610
 611static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
 612				   const union ib_gid *gid,
 613				   u8 gid_type,
 614				   int index)
 615{
 616	int ret;
 617	union pvrdma_cmd_req req;
 618	struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
 619
 620	if (!dev->sgid_tbl) {
 621		dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 622		return -EINVAL;
 623	}
 624
 625	memset(cmd_bind, 0, sizeof(*cmd_bind));
 626	cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
 627	memcpy(cmd_bind->new_gid, gid->raw, 16);
 628	cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
 629	cmd_bind->vlan = 0xfff;
 630	cmd_bind->index = index;
 631	cmd_bind->gid_type = gid_type;
 632
 633	ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 634	if (ret < 0) {
 635		dev_warn(&dev->pdev->dev,
 636			 "could not create binding, error: %d\n", ret);
 637		return -EFAULT;
 638	}
 639	memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
 640	return 0;
 641}
 642
 643static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context)
 644{
 645	struct pvrdma_dev *dev = to_vdev(attr->device);
 646
 647	return pvrdma_add_gid_at_index(dev, &attr->gid,
 648				       ib_gid_type_to_pvrdma(attr->gid_type),
 649				       attr->index);
 650}
 651
 652static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
 653{
 654	int ret;
 655	union pvrdma_cmd_req req;
 656	struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
 657
 658	/* Update sgid table. */
 659	if (!dev->sgid_tbl) {
 660		dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
 661		return -EINVAL;
 662	}
 663
 664	memset(cmd_dest, 0, sizeof(*cmd_dest));
 665	cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
 666	memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
 667	cmd_dest->index = index;
 668
 669	ret = pvrdma_cmd_post(dev, &req, NULL, 0);
 670	if (ret < 0) {
 671		dev_warn(&dev->pdev->dev,
 672			 "could not destroy binding, error: %d\n", ret);
 673		return ret;
 674	}
 675	memset(&dev->sgid_tbl[index], 0, 16);
 676	return 0;
 677}
 678
 679static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context)
 680{
 681	struct pvrdma_dev *dev = to_vdev(attr->device);
 682
 683	dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
 684		attr->index, dev->netdev->name);
 685
 686	return pvrdma_del_gid_at_index(dev, attr->index);
 687}
 688
 689static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
 690					  struct net_device *ndev,
 691					  unsigned long event)
 692{
 693	struct pci_dev *pdev_net;
 694	unsigned int slot;
 695
 696	switch (event) {
 697	case NETDEV_REBOOT:
 698		pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
 699		break;
 700	case NETDEV_UNREGISTER:
 701		ib_device_set_netdev(&dev->ib_dev, NULL, 1);
 702		dev_put(dev->netdev);
 703		dev->netdev = NULL;
 704		break;
 705	case NETDEV_REGISTER:
 706		/* vmxnet3 will have same bus, slot. But func will be 0 */
 707		slot = PCI_SLOT(dev->pdev->devfn);
 708		pdev_net = pci_get_slot(dev->pdev->bus,
 709					PCI_DEVFN(slot, 0));
 710		if ((dev->netdev == NULL) &&
 711		    (pci_get_drvdata(pdev_net) == ndev)) {
 712			/* this is our netdev */
 713			ib_device_set_netdev(&dev->ib_dev, ndev, 1);
 714			dev->netdev = ndev;
 715			dev_hold(ndev);
 716		}
 717		pci_dev_put(pdev_net);
 718		break;
 719
 720	default:
 721		dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
 722			event, dev_name(&dev->ib_dev.dev));
 723		break;
 724	}
 725}
 726
 727static void pvrdma_netdevice_event_work(struct work_struct *work)
 728{
 729	struct pvrdma_netdevice_work *netdev_work;
 730	struct pvrdma_dev *dev;
 731
 732	netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
 733
 734	mutex_lock(&pvrdma_device_list_lock);
 735	list_for_each_entry(dev, &pvrdma_device_list, device_link) {
 736		if ((netdev_work->event == NETDEV_REGISTER) ||
 737		    (dev->netdev == netdev_work->event_netdev)) {
 738			pvrdma_netdevice_event_handle(dev,
 739						      netdev_work->event_netdev,
 740						      netdev_work->event);
 741			break;
 742		}
 743	}
 744	mutex_unlock(&pvrdma_device_list_lock);
 745
 746	kfree(netdev_work);
 747}
 748
 749static int pvrdma_netdevice_event(struct notifier_block *this,
 750				  unsigned long event, void *ptr)
 751{
 752	struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
 753	struct pvrdma_netdevice_work *netdev_work;
 754
 755	netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
 756	if (!netdev_work)
 757		return NOTIFY_BAD;
 758
 759	INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
 760	netdev_work->event_netdev = event_netdev;
 761	netdev_work->event = event;
 762	queue_work(event_wq, &netdev_work->work);
 763
 764	return NOTIFY_DONE;
 765}
 766
 767static int pvrdma_pci_probe(struct pci_dev *pdev,
 768			    const struct pci_device_id *id)
 769{
 770	struct pci_dev *pdev_net;
 771	struct pvrdma_dev *dev;
 772	int ret;
 773	unsigned long start;
 774	unsigned long len;
 775	dma_addr_t slot_dma = 0;
 776
 777	dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
 778
 779	/* Allocate zero-out device */
 780	dev = ib_alloc_device(pvrdma_dev, ib_dev);
 781	if (!dev) {
 782		dev_err(&pdev->dev, "failed to allocate IB device\n");
 783		return -ENOMEM;
 784	}
 785
 786	mutex_lock(&pvrdma_device_list_lock);
 787	list_add(&dev->device_link, &pvrdma_device_list);
 788	mutex_unlock(&pvrdma_device_list_lock);
 789
 790	ret = pvrdma_init_device(dev);
 791	if (ret)
 792		goto err_free_device;
 793
 794	dev->pdev = pdev;
 795	pci_set_drvdata(pdev, dev);
 796
 797	ret = pci_enable_device(pdev);
 798	if (ret) {
 799		dev_err(&pdev->dev, "cannot enable PCI device\n");
 800		goto err_free_device;
 801	}
 802
 803	dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
 804		pci_resource_flags(pdev, 0));
 805	dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 806		(unsigned long long)pci_resource_len(pdev, 0));
 807	dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 808		(unsigned long long)pci_resource_start(pdev, 0));
 809	dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
 810		pci_resource_flags(pdev, 1));
 811	dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
 812		(unsigned long long)pci_resource_len(pdev, 1));
 813	dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
 814		(unsigned long long)pci_resource_start(pdev, 1));
 815
 816	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
 817	    !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
 818		dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
 819		ret = -ENOMEM;
 820		goto err_disable_pdev;
 821	}
 822
 823	ret = pci_request_regions(pdev, DRV_NAME);
 824	if (ret) {
 825		dev_err(&pdev->dev, "cannot request PCI resources\n");
 826		goto err_disable_pdev;
 827	}
 828
 829	/* Enable 64-Bit DMA */
 830	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 831	if (ret) {
 832		dev_err(&pdev->dev, "dma_set_mask failed\n");
 833		goto err_free_resource;
 834	}
 835	dma_set_max_seg_size(&pdev->dev, UINT_MAX);
 836	pci_set_master(pdev);
 837
 838	/* Map register space */
 839	start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 840	len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
 841	dev->regs = ioremap(start, len);
 842	if (!dev->regs) {
 843		dev_err(&pdev->dev, "register mapping failed\n");
 844		ret = -ENOMEM;
 845		goto err_free_resource;
 846	}
 847
 848	/* Setup per-device UAR. */
 849	dev->driver_uar.index = 0;
 850	dev->driver_uar.pfn =
 851		pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
 852		PAGE_SHIFT;
 853	dev->driver_uar.map =
 854		ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
 855	if (!dev->driver_uar.map) {
 856		dev_err(&pdev->dev, "failed to remap UAR pages\n");
 857		ret = -ENOMEM;
 858		goto err_unmap_regs;
 859	}
 860
 861	dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
 862	dev_info(&pdev->dev, "device version %d, driver version %d\n",
 863		 dev->dsr_version, PVRDMA_VERSION);
 864
 865	dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
 866				      &dev->dsrbase, GFP_KERNEL);
 867	if (!dev->dsr) {
 868		dev_err(&pdev->dev, "failed to allocate shared region\n");
 869		ret = -ENOMEM;
 870		goto err_uar_unmap;
 871	}
 872
 873	/* Setup the shared region */
 874	dev->dsr->driver_version = PVRDMA_VERSION;
 875	dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
 876		PVRDMA_GOS_BITS_32 :
 877		PVRDMA_GOS_BITS_64;
 878	dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
 879	dev->dsr->gos_info.gos_ver = 1;
 880
 881	if (dev->dsr_version < PVRDMA_PPN64_VERSION)
 882		dev->dsr->uar_pfn = dev->driver_uar.pfn;
 883	else
 884		dev->dsr->uar_pfn64 = dev->driver_uar.pfn;
 885
 886	/* Command slot. */
 887	dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 888					   &slot_dma, GFP_KERNEL);
 889	if (!dev->cmd_slot) {
 890		ret = -ENOMEM;
 891		goto err_free_dsr;
 892	}
 893
 894	dev->dsr->cmd_slot_dma = (u64)slot_dma;
 895
 896	/* Response slot. */
 897	dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 898					    &slot_dma, GFP_KERNEL);
 899	if (!dev->resp_slot) {
 900		ret = -ENOMEM;
 901		goto err_free_slots;
 902	}
 903
 904	dev->dsr->resp_slot_dma = (u64)slot_dma;
 905
 906	/* Async event ring */
 907	dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 908	ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
 909				   dev->dsr->async_ring_pages.num_pages, true);
 910	if (ret)
 911		goto err_free_slots;
 912	dev->async_ring_state = dev->async_pdir.pages[0];
 913	dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
 914
 915	/* CQ notification ring */
 916	dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
 917	ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
 918				   dev->dsr->cq_ring_pages.num_pages, true);
 919	if (ret)
 920		goto err_free_async_ring;
 921	dev->cq_ring_state = dev->cq_pdir.pages[0];
 922	dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
 923
 924	/*
 925	 * Write the PA of the shared region to the device. The writes must be
 926	 * ordered such that the high bits are written last. When the writes
 927	 * complete, the device will have filled out the capabilities.
 928	 */
 929
 930	pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
 931	pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
 932			 (u32)((u64)(dev->dsrbase) >> 32));
 933
 934	/* Make sure the write is complete before reading status. */
 935	mb();
 936
 937	/* The driver supports RoCE V1 and V2. */
 938	if (!PVRDMA_SUPPORTED(dev)) {
 939		dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
 940		ret = -EFAULT;
 941		goto err_free_cq_ring;
 942	}
 943
 944	/* Paired vmxnet3 will have same bus, slot. But func will be 0 */
 945	pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
 946	if (!pdev_net) {
 947		dev_err(&pdev->dev, "failed to find paired net device\n");
 948		ret = -ENODEV;
 949		goto err_free_cq_ring;
 950	}
 951
 952	if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
 953	    pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
 954		dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
 955		pci_dev_put(pdev_net);
 956		ret = -ENODEV;
 957		goto err_free_cq_ring;
 958	}
 959
 960	dev->netdev = pci_get_drvdata(pdev_net);
 961	pci_dev_put(pdev_net);
 962	if (!dev->netdev) {
 963		dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
 964		ret = -ENODEV;
 965		goto err_free_cq_ring;
 966	}
 967	dev_hold(dev->netdev);
 968
 969	dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
 970
 971	/* Interrupt setup */
 972	ret = pvrdma_alloc_intrs(dev);
 973	if (ret) {
 974		dev_err(&pdev->dev, "failed to allocate interrupts\n");
 975		ret = -ENOMEM;
 976		goto err_free_cq_ring;
 977	}
 978
 979	/* Allocate UAR table. */
 980	ret = pvrdma_uar_table_init(dev);
 981	if (ret) {
 982		dev_err(&pdev->dev, "failed to allocate UAR table\n");
 983		ret = -ENOMEM;
 984		goto err_free_intrs;
 985	}
 986
 987	/* Allocate GID table */
 988	dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
 989				sizeof(union ib_gid), GFP_KERNEL);
 990	if (!dev->sgid_tbl) {
 991		ret = -ENOMEM;
 992		goto err_free_uar_table;
 993	}
 994	dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
 995
 996	pvrdma_enable_intrs(dev);
 997
 998	/* Activate pvrdma device */
 999	pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
1000
1001	/* Make sure the write is complete before reading status. */
1002	mb();
1003
1004	/* Check if device was successfully activated */
1005	ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
1006	if (ret != 0) {
1007		dev_err(&pdev->dev, "failed to activate device\n");
1008		ret = -EFAULT;
1009		goto err_disable_intr;
1010	}
1011
1012	/* Register IB device */
1013	ret = pvrdma_register_device(dev);
1014	if (ret) {
1015		dev_err(&pdev->dev, "failed to register IB device\n");
1016		goto err_disable_intr;
1017	}
1018
1019	dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1020	ret = register_netdevice_notifier(&dev->nb_netdev);
1021	if (ret) {
1022		dev_err(&pdev->dev, "failed to register netdevice events\n");
1023		goto err_unreg_ibdev;
1024	}
1025
1026	dev_info(&pdev->dev, "attached to device\n");
1027	return 0;
1028
1029err_unreg_ibdev:
1030	ib_unregister_device(&dev->ib_dev);
1031err_disable_intr:
1032	pvrdma_disable_intrs(dev);
1033	kfree(dev->sgid_tbl);
1034err_free_uar_table:
1035	pvrdma_uar_table_cleanup(dev);
1036err_free_intrs:
1037	pvrdma_free_irq(dev);
1038	pci_free_irq_vectors(pdev);
1039err_free_cq_ring:
1040	dev_put(dev->netdev);
1041	dev->netdev = NULL;
1042	pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1043err_free_async_ring:
1044	pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1045err_free_slots:
1046	pvrdma_free_slots(dev);
1047err_free_dsr:
1048	dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1049			  dev->dsrbase);
1050err_uar_unmap:
1051	iounmap(dev->driver_uar.map);
1052err_unmap_regs:
1053	iounmap(dev->regs);
1054err_free_resource:
1055	pci_release_regions(pdev);
1056err_disable_pdev:
1057	pci_disable_device(pdev);
1058	pci_set_drvdata(pdev, NULL);
1059err_free_device:
1060	mutex_lock(&pvrdma_device_list_lock);
1061	list_del(&dev->device_link);
1062	mutex_unlock(&pvrdma_device_list_lock);
1063	ib_dealloc_device(&dev->ib_dev);
1064	return ret;
1065}
1066
1067static void pvrdma_pci_remove(struct pci_dev *pdev)
1068{
1069	struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1070
1071	if (!dev)
1072		return;
1073
1074	dev_info(&pdev->dev, "detaching from device\n");
1075
1076	unregister_netdevice_notifier(&dev->nb_netdev);
1077	dev->nb_netdev.notifier_call = NULL;
1078
1079	flush_workqueue(event_wq);
1080
1081	dev_put(dev->netdev);
1082	dev->netdev = NULL;
1083
1084	/* Unregister ib device */
1085	ib_unregister_device(&dev->ib_dev);
1086
1087	mutex_lock(&pvrdma_device_list_lock);
1088	list_del(&dev->device_link);
1089	mutex_unlock(&pvrdma_device_list_lock);
1090
1091	pvrdma_disable_intrs(dev);
1092	pvrdma_free_irq(dev);
1093	pci_free_irq_vectors(pdev);
1094
1095	/* Deactivate pvrdma device */
1096	pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1097	pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1098	pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1099	pvrdma_free_slots(dev);
1100	dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1101			  dev->dsrbase);
1102
1103	iounmap(dev->regs);
1104	kfree(dev->sgid_tbl);
1105	kfree(dev->cq_tbl);
1106	kfree(dev->srq_tbl);
1107	kfree(dev->qp_tbl);
1108	pvrdma_uar_table_cleanup(dev);
1109	iounmap(dev->driver_uar.map);
1110
1111	ib_dealloc_device(&dev->ib_dev);
1112
1113	/* Free pci resources */
1114	pci_release_regions(pdev);
1115	pci_disable_device(pdev);
1116	pci_set_drvdata(pdev, NULL);
1117}
1118
1119static const struct pci_device_id pvrdma_pci_table[] = {
1120	{ PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1121	{ 0 },
1122};
1123
1124MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1125
1126static struct pci_driver pvrdma_driver = {
1127	.name		= DRV_NAME,
1128	.id_table	= pvrdma_pci_table,
1129	.probe		= pvrdma_pci_probe,
1130	.remove		= pvrdma_pci_remove,
1131};
1132
1133static int __init pvrdma_init(void)
1134{
1135	int err;
1136
1137	event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1138	if (!event_wq)
1139		return -ENOMEM;
1140
1141	err = pci_register_driver(&pvrdma_driver);
1142	if (err)
1143		destroy_workqueue(event_wq);
1144
1145	return err;
1146}
1147
1148static void __exit pvrdma_cleanup(void)
1149{
1150	pci_unregister_driver(&pvrdma_driver);
1151
1152	destroy_workqueue(event_wq);
1153}
1154
1155module_init(pvrdma_init);
1156module_exit(pvrdma_cleanup);
1157
1158MODULE_AUTHOR("VMware, Inc");
1159MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1160MODULE_LICENSE("Dual BSD/GPL");