1 /*
2  * Copyright (c) 2012-2016 VMware, Inc.  All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of EITHER the GNU General Public License
6  * version 2 as published by the Free Software Foundation or the BSD
7  * 2-Clause License. This program is distributed in the hope that it
8  * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
9  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
10  * See the GNU General Public License version 2 for more details at
11  * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program available in the file COPYING in the main
15  * directory of this source tree.
16  *
17  * The BSD 2-Clause License
18  *
19  *     Redistribution and use in source and binary forms, with or
20  *     without modification, are permitted provided that the following
21  *     conditions are met:
22  *
23  *      - Redistributions of source code must retain the above
24  *        copyright notice, this list of conditions and the following
25  *        disclaimer.
26  *
27  *      - Redistributions in binary form must reproduce the above
28  *        copyright notice, this list of conditions and the following
29  *        disclaimer in the documentation and/or other materials
30  *        provided with the distribution.
31  *
32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
35  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
36  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43  * OF THE POSSIBILITY OF SUCH DAMAGE.
44  */
45 
46 #include <linux/errno.h>
47 #include <linux/inetdevice.h>
48 #include <linux/init.h>
49 #include <linux/module.h>
50 #include <linux/slab.h>
51 #include <rdma/ib_addr.h>
52 #include <rdma/ib_smi.h>
53 #include <rdma/ib_user_verbs.h>
54 #include <net/addrconf.h>
55 
56 #include "pvrdma.h"
57 
58 #define DRV_NAME	"vmw_pvrdma"
59 #define DRV_VERSION	"1.0.1.0-k"
60 
61 static DEFINE_MUTEX(pvrdma_device_list_lock);
62 static LIST_HEAD(pvrdma_device_list);
63 static struct workqueue_struct *event_wq;
64 
65 static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context);
66 static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context);
67 
68 static ssize_t hca_type_show(struct device *device,
69 			     struct device_attribute *attr, char *buf)
70 {
71 	return sysfs_emit(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
72 }
73 static DEVICE_ATTR_RO(hca_type);
74 
75 static ssize_t hw_rev_show(struct device *device,
76 			   struct device_attribute *attr, char *buf)
77 {
78 	return sysfs_emit(buf, "%d\n", PVRDMA_REV_ID);
79 }
80 static DEVICE_ATTR_RO(hw_rev);
81 
82 static ssize_t board_id_show(struct device *device,
83 			     struct device_attribute *attr, char *buf)
84 {
85 	return sysfs_emit(buf, "%d\n", PVRDMA_BOARD_ID);
86 }
87 static DEVICE_ATTR_RO(board_id);
88 
89 static struct attribute *pvrdma_class_attributes[] = {
90 	&dev_attr_hw_rev.attr,
91 	&dev_attr_hca_type.attr,
92 	&dev_attr_board_id.attr,
93 	NULL,
94 };
95 
96 static const struct attribute_group pvrdma_attr_group = {
97 	.attrs = pvrdma_class_attributes,
98 };
99 
100 static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str)
101 {
102 	struct pvrdma_dev *dev =
103 		container_of(device, struct pvrdma_dev, ib_dev);
104 	snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n",
105 		 (int) (dev->dsr->caps.fw_ver >> 32),
106 		 (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
107 		 (int) dev->dsr->caps.fw_ver & 0xffff);
108 }
109 
110 static int pvrdma_init_device(struct pvrdma_dev *dev)
111 {
112 	/*  Initialize some device related stuff */
113 	spin_lock_init(&dev->cmd_lock);
114 	sema_init(&dev->cmd_sema, 1);
115 	atomic_set(&dev->num_qps, 0);
116 	atomic_set(&dev->num_srqs, 0);
117 	atomic_set(&dev->num_cqs, 0);
118 	atomic_set(&dev->num_pds, 0);
119 	atomic_set(&dev->num_ahs, 0);
120 
121 	return 0;
122 }
123 
124 static int pvrdma_port_immutable(struct ib_device *ibdev, 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 
146 static const struct ib_device_ops pvrdma_dev_ops = {
147 	.owner = THIS_MODULE,
148 	.driver_id = RDMA_DRIVER_VMW_PVRDMA,
149 	.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION,
150 
151 	.add_gid = pvrdma_add_gid,
152 	.alloc_mr = pvrdma_alloc_mr,
153 	.alloc_pd = pvrdma_alloc_pd,
154 	.alloc_ucontext = pvrdma_alloc_ucontext,
155 	.create_ah = pvrdma_create_ah,
156 	.create_cq = pvrdma_create_cq,
157 	.create_qp = pvrdma_create_qp,
158 	.dealloc_pd = pvrdma_dealloc_pd,
159 	.dealloc_ucontext = pvrdma_dealloc_ucontext,
160 	.del_gid = pvrdma_del_gid,
161 	.dereg_mr = pvrdma_dereg_mr,
162 	.destroy_ah = pvrdma_destroy_ah,
163 	.destroy_cq = pvrdma_destroy_cq,
164 	.destroy_qp = pvrdma_destroy_qp,
165 	.device_group = &pvrdma_attr_group,
166 	.get_dev_fw_str = pvrdma_get_fw_ver_str,
167 	.get_dma_mr = pvrdma_get_dma_mr,
168 	.get_link_layer = pvrdma_port_link_layer,
169 	.get_port_immutable = pvrdma_port_immutable,
170 	.map_mr_sg = pvrdma_map_mr_sg,
171 	.mmap = pvrdma_mmap,
172 	.modify_port = pvrdma_modify_port,
173 	.modify_qp = pvrdma_modify_qp,
174 	.poll_cq = pvrdma_poll_cq,
175 	.post_recv = pvrdma_post_recv,
176 	.post_send = pvrdma_post_send,
177 	.query_device = pvrdma_query_device,
178 	.query_gid = pvrdma_query_gid,
179 	.query_pkey = pvrdma_query_pkey,
180 	.query_port = pvrdma_query_port,
181 	.query_qp = pvrdma_query_qp,
182 	.reg_user_mr = pvrdma_reg_user_mr,
183 	.req_notify_cq = pvrdma_req_notify_cq,
184 
185 	INIT_RDMA_OBJ_SIZE(ib_ah, pvrdma_ah, ibah),
186 	INIT_RDMA_OBJ_SIZE(ib_cq, pvrdma_cq, ibcq),
187 	INIT_RDMA_OBJ_SIZE(ib_pd, pvrdma_pd, ibpd),
188 	INIT_RDMA_OBJ_SIZE(ib_qp, pvrdma_qp, ibqp),
189 	INIT_RDMA_OBJ_SIZE(ib_ucontext, pvrdma_ucontext, ibucontext),
190 };
191 
192 static const struct ib_device_ops pvrdma_dev_srq_ops = {
193 	.create_srq = pvrdma_create_srq,
194 	.destroy_srq = pvrdma_destroy_srq,
195 	.modify_srq = pvrdma_modify_srq,
196 	.query_srq = pvrdma_query_srq,
197 
198 	INIT_RDMA_OBJ_SIZE(ib_srq, pvrdma_srq, ibsrq),
199 };
200 
201 static int pvrdma_register_device(struct pvrdma_dev *dev)
202 {
203 	int ret = -1;
204 
205 	dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
206 	dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
207 	dev->flags = 0;
208 	dev->ib_dev.num_comp_vectors = 1;
209 	dev->ib_dev.dev.parent = &dev->pdev->dev;
210 
211 	dev->ib_dev.node_type = RDMA_NODE_IB_CA;
212 	dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
213 
214 	ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_ops);
215 
216 	mutex_init(&dev->port_mutex);
217 	spin_lock_init(&dev->desc_lock);
218 
219 	dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *),
220 			      GFP_KERNEL);
221 	if (!dev->cq_tbl)
222 		return ret;
223 	spin_lock_init(&dev->cq_tbl_lock);
224 
225 	dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *),
226 			      GFP_KERNEL);
227 	if (!dev->qp_tbl)
228 		goto err_cq_free;
229 	spin_lock_init(&dev->qp_tbl_lock);
230 
231 	/* Check if SRQ is supported by backend */
232 	if (dev->dsr->caps.max_srq) {
233 		ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_srq_ops);
234 
235 		dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
236 				       sizeof(struct pvrdma_srq *),
237 				       GFP_KERNEL);
238 		if (!dev->srq_tbl)
239 			goto err_qp_free;
240 	}
241 	ret = ib_device_set_netdev(&dev->ib_dev, dev->netdev, 1);
242 	if (ret)
243 		goto err_srq_free;
244 	spin_lock_init(&dev->srq_tbl_lock);
245 
246 	ret = ib_register_device(&dev->ib_dev, "vmw_pvrdma%d", &dev->pdev->dev);
247 	if (ret)
248 		goto err_srq_free;
249 
250 	dev->ib_active = true;
251 
252 	return 0;
253 
254 err_srq_free:
255 	kfree(dev->srq_tbl);
256 err_qp_free:
257 	kfree(dev->qp_tbl);
258 err_cq_free:
259 	kfree(dev->cq_tbl);
260 
261 	return ret;
262 }
263 
264 static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
265 {
266 	u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
267 	struct pvrdma_dev *dev = dev_id;
268 
269 	dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
270 
271 	if (!dev->pdev->msix_enabled) {
272 		/* Legacy intr */
273 		icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
274 		if (icr == 0)
275 			return IRQ_NONE;
276 	}
277 
278 	if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
279 		complete(&dev->cmd_done);
280 
281 	return IRQ_HANDLED;
282 }
283 
284 static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
285 {
286 	struct pvrdma_qp *qp;
287 	unsigned long flags;
288 
289 	spin_lock_irqsave(&dev->qp_tbl_lock, flags);
290 	qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
291 	if (qp)
292 		refcount_inc(&qp->refcnt);
293 	spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
294 
295 	if (qp && qp->ibqp.event_handler) {
296 		struct ib_qp *ibqp = &qp->ibqp;
297 		struct ib_event e;
298 
299 		e.device = ibqp->device;
300 		e.element.qp = ibqp;
301 		e.event = type; /* 1:1 mapping for now. */
302 		ibqp->event_handler(&e, ibqp->qp_context);
303 	}
304 	if (qp) {
305 		if (refcount_dec_and_test(&qp->refcnt))
306 			complete(&qp->free);
307 	}
308 }
309 
310 static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
311 {
312 	struct pvrdma_cq *cq;
313 	unsigned long flags;
314 
315 	spin_lock_irqsave(&dev->cq_tbl_lock, flags);
316 	cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
317 	if (cq)
318 		refcount_inc(&cq->refcnt);
319 	spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
320 
321 	if (cq && cq->ibcq.event_handler) {
322 		struct ib_cq *ibcq = &cq->ibcq;
323 		struct ib_event e;
324 
325 		e.device = ibcq->device;
326 		e.element.cq = ibcq;
327 		e.event = type; /* 1:1 mapping for now. */
328 		ibcq->event_handler(&e, ibcq->cq_context);
329 	}
330 	if (cq) {
331 		if (refcount_dec_and_test(&cq->refcnt))
332 			complete(&cq->free);
333 	}
334 }
335 
336 static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
337 {
338 	struct pvrdma_srq *srq;
339 	unsigned long flags;
340 
341 	spin_lock_irqsave(&dev->srq_tbl_lock, flags);
342 	if (dev->srq_tbl)
343 		srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
344 	else
345 		srq = NULL;
346 	if (srq)
347 		refcount_inc(&srq->refcnt);
348 	spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
349 
350 	if (srq && srq->ibsrq.event_handler) {
351 		struct ib_srq *ibsrq = &srq->ibsrq;
352 		struct ib_event e;
353 
354 		e.device = ibsrq->device;
355 		e.element.srq = ibsrq;
356 		e.event = type; /* 1:1 mapping for now. */
357 		ibsrq->event_handler(&e, ibsrq->srq_context);
358 	}
359 	if (srq) {
360 		if (refcount_dec_and_test(&srq->refcnt))
361 			complete(&srq->free);
362 	}
363 }
364 
365 static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
366 				  enum ib_event_type event)
367 {
368 	struct ib_event ib_event;
369 
370 	memset(&ib_event, 0, sizeof(ib_event));
371 	ib_event.device = &dev->ib_dev;
372 	ib_event.element.port_num = port;
373 	ib_event.event = event;
374 	ib_dispatch_event(&ib_event);
375 }
376 
377 static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
378 {
379 	if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
380 		dev_warn(&dev->pdev->dev, "event on port %d\n", port);
381 		return;
382 	}
383 
384 	pvrdma_dispatch_event(dev, port, type);
385 }
386 
387 static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
388 {
389 	return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
390 					&dev->async_pdir,
391 					PAGE_SIZE +
392 					sizeof(struct pvrdma_eqe) * i);
393 }
394 
395 static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
396 {
397 	struct pvrdma_dev *dev = dev_id;
398 	struct pvrdma_ring *ring = &dev->async_ring_state->rx;
399 	int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
400 			 PAGE_SIZE / sizeof(struct pvrdma_eqe);
401 	unsigned int head;
402 
403 	dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
404 
405 	/*
406 	 * Don't process events until the IB device is registered. Otherwise
407 	 * we'll try to ib_dispatch_event() on an invalid device.
408 	 */
409 	if (!dev->ib_active)
410 		return IRQ_HANDLED;
411 
412 	while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
413 		struct pvrdma_eqe *eqe;
414 
415 		eqe = get_eqe(dev, head);
416 
417 		switch (eqe->type) {
418 		case PVRDMA_EVENT_QP_FATAL:
419 		case PVRDMA_EVENT_QP_REQ_ERR:
420 		case PVRDMA_EVENT_QP_ACCESS_ERR:
421 		case PVRDMA_EVENT_COMM_EST:
422 		case PVRDMA_EVENT_SQ_DRAINED:
423 		case PVRDMA_EVENT_PATH_MIG:
424 		case PVRDMA_EVENT_PATH_MIG_ERR:
425 		case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
426 			pvrdma_qp_event(dev, eqe->info, eqe->type);
427 			break;
428 
429 		case PVRDMA_EVENT_CQ_ERR:
430 			pvrdma_cq_event(dev, eqe->info, eqe->type);
431 			break;
432 
433 		case PVRDMA_EVENT_SRQ_ERR:
434 		case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
435 			pvrdma_srq_event(dev, eqe->info, eqe->type);
436 			break;
437 
438 		case PVRDMA_EVENT_PORT_ACTIVE:
439 		case PVRDMA_EVENT_PORT_ERR:
440 		case PVRDMA_EVENT_LID_CHANGE:
441 		case PVRDMA_EVENT_PKEY_CHANGE:
442 		case PVRDMA_EVENT_SM_CHANGE:
443 		case PVRDMA_EVENT_CLIENT_REREGISTER:
444 		case PVRDMA_EVENT_GID_CHANGE:
445 			pvrdma_dev_event(dev, eqe->info, eqe->type);
446 			break;
447 
448 		case PVRDMA_EVENT_DEVICE_FATAL:
449 			pvrdma_dev_event(dev, 1, eqe->type);
450 			break;
451 
452 		default:
453 			break;
454 		}
455 
456 		pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
457 	}
458 
459 	return IRQ_HANDLED;
460 }
461 
462 static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
463 					   unsigned int i)
464 {
465 	return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
466 					&dev->cq_pdir,
467 					PAGE_SIZE +
468 					sizeof(struct pvrdma_cqne) * i);
469 }
470 
471 static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
472 {
473 	struct pvrdma_dev *dev = dev_id;
474 	struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
475 	int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
476 			 sizeof(struct pvrdma_cqne);
477 	unsigned int head;
478 
479 	dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
480 
481 	while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
482 		struct pvrdma_cqne *cqne;
483 		struct pvrdma_cq *cq;
484 
485 		cqne = get_cqne(dev, head);
486 		spin_lock(&dev->cq_tbl_lock);
487 		cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
488 		if (cq)
489 			refcount_inc(&cq->refcnt);
490 		spin_unlock(&dev->cq_tbl_lock);
491 
492 		if (cq && cq->ibcq.comp_handler)
493 			cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
494 		if (cq) {
495 			if (refcount_dec_and_test(&cq->refcnt))
496 				complete(&cq->free);
497 		}
498 		pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
499 	}
500 
501 	return IRQ_HANDLED;
502 }
503 
504 static void pvrdma_free_irq(struct pvrdma_dev *dev)
505 {
506 	int i;
507 
508 	dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
509 	for (i = 0; i < dev->nr_vectors; i++)
510 		free_irq(pci_irq_vector(dev->pdev, i), dev);
511 }
512 
513 static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
514 {
515 	dev_dbg(&dev->pdev->dev, "enable interrupts\n");
516 	pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
517 }
518 
519 static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
520 {
521 	dev_dbg(&dev->pdev->dev, "disable interrupts\n");
522 	pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
523 }
524 
525 static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
526 {
527 	struct pci_dev *pdev = dev->pdev;
528 	int ret = 0, i;
529 
530 	ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
531 			PCI_IRQ_MSIX);
532 	if (ret < 0) {
533 		ret = pci_alloc_irq_vectors(pdev, 1, 1,
534 				PCI_IRQ_MSI | PCI_IRQ_LEGACY);
535 		if (ret < 0)
536 			return ret;
537 	}
538 	dev->nr_vectors = ret;
539 
540 	ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
541 			pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
542 	if (ret) {
543 		dev_err(&dev->pdev->dev,
544 			"failed to request interrupt 0\n");
545 		goto out_free_vectors;
546 	}
547 
548 	for (i = 1; i < dev->nr_vectors; i++) {
549 		ret = request_irq(pci_irq_vector(dev->pdev, i),
550 				i == 1 ? pvrdma_intr1_handler :
551 					 pvrdma_intrx_handler,
552 				0, DRV_NAME, dev);
553 		if (ret) {
554 			dev_err(&dev->pdev->dev,
555 				"failed to request interrupt %d\n", i);
556 			goto free_irqs;
557 		}
558 	}
559 
560 	return 0;
561 
562 free_irqs:
563 	while (--i >= 0)
564 		free_irq(pci_irq_vector(dev->pdev, i), dev);
565 out_free_vectors:
566 	pci_free_irq_vectors(pdev);
567 	return ret;
568 }
569 
570 static void pvrdma_free_slots(struct pvrdma_dev *dev)
571 {
572 	struct pci_dev *pdev = dev->pdev;
573 
574 	if (dev->resp_slot)
575 		dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
576 				  dev->dsr->resp_slot_dma);
577 	if (dev->cmd_slot)
578 		dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
579 				  dev->dsr->cmd_slot_dma);
580 }
581 
582 static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
583 				   const union ib_gid *gid,
584 				   u8 gid_type,
585 				   int index)
586 {
587 	int ret;
588 	union pvrdma_cmd_req req;
589 	struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
590 
591 	if (!dev->sgid_tbl) {
592 		dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
593 		return -EINVAL;
594 	}
595 
596 	memset(cmd_bind, 0, sizeof(*cmd_bind));
597 	cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
598 	memcpy(cmd_bind->new_gid, gid->raw, 16);
599 	cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
600 	cmd_bind->vlan = 0xfff;
601 	cmd_bind->index = index;
602 	cmd_bind->gid_type = gid_type;
603 
604 	ret = pvrdma_cmd_post(dev, &req, NULL, 0);
605 	if (ret < 0) {
606 		dev_warn(&dev->pdev->dev,
607 			 "could not create binding, error: %d\n", ret);
608 		return -EFAULT;
609 	}
610 	memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
611 	return 0;
612 }
613 
614 static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context)
615 {
616 	struct pvrdma_dev *dev = to_vdev(attr->device);
617 
618 	return pvrdma_add_gid_at_index(dev, &attr->gid,
619 				       ib_gid_type_to_pvrdma(attr->gid_type),
620 				       attr->index);
621 }
622 
623 static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
624 {
625 	int ret;
626 	union pvrdma_cmd_req req;
627 	struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
628 
629 	/* Update sgid table. */
630 	if (!dev->sgid_tbl) {
631 		dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
632 		return -EINVAL;
633 	}
634 
635 	memset(cmd_dest, 0, sizeof(*cmd_dest));
636 	cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
637 	memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
638 	cmd_dest->index = index;
639 
640 	ret = pvrdma_cmd_post(dev, &req, NULL, 0);
641 	if (ret < 0) {
642 		dev_warn(&dev->pdev->dev,
643 			 "could not destroy binding, error: %d\n", ret);
644 		return ret;
645 	}
646 	memset(&dev->sgid_tbl[index], 0, 16);
647 	return 0;
648 }
649 
650 static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context)
651 {
652 	struct pvrdma_dev *dev = to_vdev(attr->device);
653 
654 	dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
655 		attr->index, dev->netdev->name);
656 
657 	return pvrdma_del_gid_at_index(dev, attr->index);
658 }
659 
660 static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
661 					  struct net_device *ndev,
662 					  unsigned long event)
663 {
664 	struct pci_dev *pdev_net;
665 	unsigned int slot;
666 
667 	switch (event) {
668 	case NETDEV_REBOOT:
669 	case NETDEV_DOWN:
670 		pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
671 		break;
672 	case NETDEV_UP:
673 		pvrdma_write_reg(dev, PVRDMA_REG_CTL,
674 				 PVRDMA_DEVICE_CTL_UNQUIESCE);
675 
676 		mb();
677 
678 		if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
679 			dev_err(&dev->pdev->dev,
680 				"failed to activate device during link up\n");
681 		else
682 			pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
683 		break;
684 	case NETDEV_UNREGISTER:
685 		ib_device_set_netdev(&dev->ib_dev, NULL, 1);
686 		dev_put(dev->netdev);
687 		dev->netdev = NULL;
688 		break;
689 	case NETDEV_REGISTER:
690 		/* vmxnet3 will have same bus, slot. But func will be 0 */
691 		slot = PCI_SLOT(dev->pdev->devfn);
692 		pdev_net = pci_get_slot(dev->pdev->bus,
693 					PCI_DEVFN(slot, 0));
694 		if ((dev->netdev == NULL) &&
695 		    (pci_get_drvdata(pdev_net) == ndev)) {
696 			/* this is our netdev */
697 			ib_device_set_netdev(&dev->ib_dev, ndev, 1);
698 			dev->netdev = ndev;
699 			dev_hold(ndev);
700 		}
701 		pci_dev_put(pdev_net);
702 		break;
703 
704 	default:
705 		dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
706 			event, dev_name(&dev->ib_dev.dev));
707 		break;
708 	}
709 }
710 
711 static void pvrdma_netdevice_event_work(struct work_struct *work)
712 {
713 	struct pvrdma_netdevice_work *netdev_work;
714 	struct pvrdma_dev *dev;
715 
716 	netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
717 
718 	mutex_lock(&pvrdma_device_list_lock);
719 	list_for_each_entry(dev, &pvrdma_device_list, device_link) {
720 		if ((netdev_work->event == NETDEV_REGISTER) ||
721 		    (dev->netdev == netdev_work->event_netdev)) {
722 			pvrdma_netdevice_event_handle(dev,
723 						      netdev_work->event_netdev,
724 						      netdev_work->event);
725 			break;
726 		}
727 	}
728 	mutex_unlock(&pvrdma_device_list_lock);
729 
730 	kfree(netdev_work);
731 }
732 
733 static int pvrdma_netdevice_event(struct notifier_block *this,
734 				  unsigned long event, void *ptr)
735 {
736 	struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
737 	struct pvrdma_netdevice_work *netdev_work;
738 
739 	netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
740 	if (!netdev_work)
741 		return NOTIFY_BAD;
742 
743 	INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
744 	netdev_work->event_netdev = event_netdev;
745 	netdev_work->event = event;
746 	queue_work(event_wq, &netdev_work->work);
747 
748 	return NOTIFY_DONE;
749 }
750 
751 static int pvrdma_pci_probe(struct pci_dev *pdev,
752 			    const struct pci_device_id *id)
753 {
754 	struct pci_dev *pdev_net;
755 	struct pvrdma_dev *dev;
756 	int ret;
757 	unsigned long start;
758 	unsigned long len;
759 	dma_addr_t slot_dma = 0;
760 
761 	dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
762 
763 	/* Allocate zero-out device */
764 	dev = ib_alloc_device(pvrdma_dev, ib_dev);
765 	if (!dev) {
766 		dev_err(&pdev->dev, "failed to allocate IB device\n");
767 		return -ENOMEM;
768 	}
769 
770 	mutex_lock(&pvrdma_device_list_lock);
771 	list_add(&dev->device_link, &pvrdma_device_list);
772 	mutex_unlock(&pvrdma_device_list_lock);
773 
774 	ret = pvrdma_init_device(dev);
775 	if (ret)
776 		goto err_free_device;
777 
778 	dev->pdev = pdev;
779 	pci_set_drvdata(pdev, dev);
780 
781 	ret = pci_enable_device(pdev);
782 	if (ret) {
783 		dev_err(&pdev->dev, "cannot enable PCI device\n");
784 		goto err_free_device;
785 	}
786 
787 	dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
788 		pci_resource_flags(pdev, 0));
789 	dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
790 		(unsigned long long)pci_resource_len(pdev, 0));
791 	dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
792 		(unsigned long long)pci_resource_start(pdev, 0));
793 	dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
794 		pci_resource_flags(pdev, 1));
795 	dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
796 		(unsigned long long)pci_resource_len(pdev, 1));
797 	dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
798 		(unsigned long long)pci_resource_start(pdev, 1));
799 
800 	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
801 	    !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
802 		dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
803 		ret = -ENOMEM;
804 		goto err_disable_pdev;
805 	}
806 
807 	ret = pci_request_regions(pdev, DRV_NAME);
808 	if (ret) {
809 		dev_err(&pdev->dev, "cannot request PCI resources\n");
810 		goto err_disable_pdev;
811 	}
812 
813 	/* Enable 64-Bit DMA */
814 	if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) != 0) {
815 		ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
816 		if (ret != 0) {
817 			dev_err(&pdev->dev, "dma_set_mask failed\n");
818 			goto err_free_resource;
819 		}
820 	}
821 	dma_set_max_seg_size(&pdev->dev, UINT_MAX);
822 	pci_set_master(pdev);
823 
824 	/* Map register space */
825 	start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
826 	len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
827 	dev->regs = ioremap(start, len);
828 	if (!dev->regs) {
829 		dev_err(&pdev->dev, "register mapping failed\n");
830 		ret = -ENOMEM;
831 		goto err_free_resource;
832 	}
833 
834 	/* Setup per-device UAR. */
835 	dev->driver_uar.index = 0;
836 	dev->driver_uar.pfn =
837 		pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
838 		PAGE_SHIFT;
839 	dev->driver_uar.map =
840 		ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
841 	if (!dev->driver_uar.map) {
842 		dev_err(&pdev->dev, "failed to remap UAR pages\n");
843 		ret = -ENOMEM;
844 		goto err_unmap_regs;
845 	}
846 
847 	dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
848 	dev_info(&pdev->dev, "device version %d, driver version %d\n",
849 		 dev->dsr_version, PVRDMA_VERSION);
850 
851 	dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
852 				      &dev->dsrbase, GFP_KERNEL);
853 	if (!dev->dsr) {
854 		dev_err(&pdev->dev, "failed to allocate shared region\n");
855 		ret = -ENOMEM;
856 		goto err_uar_unmap;
857 	}
858 
859 	/* Setup the shared region */
860 	dev->dsr->driver_version = PVRDMA_VERSION;
861 	dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
862 		PVRDMA_GOS_BITS_32 :
863 		PVRDMA_GOS_BITS_64;
864 	dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
865 	dev->dsr->gos_info.gos_ver = 1;
866 
867 	if (dev->dsr_version < PVRDMA_PPN64_VERSION)
868 		dev->dsr->uar_pfn = dev->driver_uar.pfn;
869 	else
870 		dev->dsr->uar_pfn64 = dev->driver_uar.pfn;
871 
872 	/* Command slot. */
873 	dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
874 					   &slot_dma, GFP_KERNEL);
875 	if (!dev->cmd_slot) {
876 		ret = -ENOMEM;
877 		goto err_free_dsr;
878 	}
879 
880 	dev->dsr->cmd_slot_dma = (u64)slot_dma;
881 
882 	/* Response slot. */
883 	dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
884 					    &slot_dma, GFP_KERNEL);
885 	if (!dev->resp_slot) {
886 		ret = -ENOMEM;
887 		goto err_free_slots;
888 	}
889 
890 	dev->dsr->resp_slot_dma = (u64)slot_dma;
891 
892 	/* Async event ring */
893 	dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
894 	ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
895 				   dev->dsr->async_ring_pages.num_pages, true);
896 	if (ret)
897 		goto err_free_slots;
898 	dev->async_ring_state = dev->async_pdir.pages[0];
899 	dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
900 
901 	/* CQ notification ring */
902 	dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
903 	ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
904 				   dev->dsr->cq_ring_pages.num_pages, true);
905 	if (ret)
906 		goto err_free_async_ring;
907 	dev->cq_ring_state = dev->cq_pdir.pages[0];
908 	dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
909 
910 	/*
911 	 * Write the PA of the shared region to the device. The writes must be
912 	 * ordered such that the high bits are written last. When the writes
913 	 * complete, the device will have filled out the capabilities.
914 	 */
915 
916 	pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
917 	pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
918 			 (u32)((u64)(dev->dsrbase) >> 32));
919 
920 	/* Make sure the write is complete before reading status. */
921 	mb();
922 
923 	/* The driver supports RoCE V1 and V2. */
924 	if (!PVRDMA_SUPPORTED(dev)) {
925 		dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
926 		ret = -EFAULT;
927 		goto err_free_cq_ring;
928 	}
929 
930 	/* Paired vmxnet3 will have same bus, slot. But func will be 0 */
931 	pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
932 	if (!pdev_net) {
933 		dev_err(&pdev->dev, "failed to find paired net device\n");
934 		ret = -ENODEV;
935 		goto err_free_cq_ring;
936 	}
937 
938 	if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
939 	    pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
940 		dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
941 		pci_dev_put(pdev_net);
942 		ret = -ENODEV;
943 		goto err_free_cq_ring;
944 	}
945 
946 	dev->netdev = pci_get_drvdata(pdev_net);
947 	pci_dev_put(pdev_net);
948 	if (!dev->netdev) {
949 		dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
950 		ret = -ENODEV;
951 		goto err_free_cq_ring;
952 	}
953 	dev_hold(dev->netdev);
954 
955 	dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
956 
957 	/* Interrupt setup */
958 	ret = pvrdma_alloc_intrs(dev);
959 	if (ret) {
960 		dev_err(&pdev->dev, "failed to allocate interrupts\n");
961 		ret = -ENOMEM;
962 		goto err_free_cq_ring;
963 	}
964 
965 	/* Allocate UAR table. */
966 	ret = pvrdma_uar_table_init(dev);
967 	if (ret) {
968 		dev_err(&pdev->dev, "failed to allocate UAR table\n");
969 		ret = -ENOMEM;
970 		goto err_free_intrs;
971 	}
972 
973 	/* Allocate GID table */
974 	dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
975 				sizeof(union ib_gid), GFP_KERNEL);
976 	if (!dev->sgid_tbl) {
977 		ret = -ENOMEM;
978 		goto err_free_uar_table;
979 	}
980 	dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
981 
982 	pvrdma_enable_intrs(dev);
983 
984 	/* Activate pvrdma device */
985 	pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
986 
987 	/* Make sure the write is complete before reading status. */
988 	mb();
989 
990 	/* Check if device was successfully activated */
991 	ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
992 	if (ret != 0) {
993 		dev_err(&pdev->dev, "failed to activate device\n");
994 		ret = -EFAULT;
995 		goto err_disable_intr;
996 	}
997 
998 	/* Register IB device */
999 	ret = pvrdma_register_device(dev);
1000 	if (ret) {
1001 		dev_err(&pdev->dev, "failed to register IB device\n");
1002 		goto err_disable_intr;
1003 	}
1004 
1005 	dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1006 	ret = register_netdevice_notifier(&dev->nb_netdev);
1007 	if (ret) {
1008 		dev_err(&pdev->dev, "failed to register netdevice events\n");
1009 		goto err_unreg_ibdev;
1010 	}
1011 
1012 	dev_info(&pdev->dev, "attached to device\n");
1013 	return 0;
1014 
1015 err_unreg_ibdev:
1016 	ib_unregister_device(&dev->ib_dev);
1017 err_disable_intr:
1018 	pvrdma_disable_intrs(dev);
1019 	kfree(dev->sgid_tbl);
1020 err_free_uar_table:
1021 	pvrdma_uar_table_cleanup(dev);
1022 err_free_intrs:
1023 	pvrdma_free_irq(dev);
1024 	pci_free_irq_vectors(pdev);
1025 err_free_cq_ring:
1026 	if (dev->netdev) {
1027 		dev_put(dev->netdev);
1028 		dev->netdev = NULL;
1029 	}
1030 	pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1031 err_free_async_ring:
1032 	pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1033 err_free_slots:
1034 	pvrdma_free_slots(dev);
1035 err_free_dsr:
1036 	dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1037 			  dev->dsrbase);
1038 err_uar_unmap:
1039 	iounmap(dev->driver_uar.map);
1040 err_unmap_regs:
1041 	iounmap(dev->regs);
1042 err_free_resource:
1043 	pci_release_regions(pdev);
1044 err_disable_pdev:
1045 	pci_disable_device(pdev);
1046 	pci_set_drvdata(pdev, NULL);
1047 err_free_device:
1048 	mutex_lock(&pvrdma_device_list_lock);
1049 	list_del(&dev->device_link);
1050 	mutex_unlock(&pvrdma_device_list_lock);
1051 	ib_dealloc_device(&dev->ib_dev);
1052 	return ret;
1053 }
1054 
1055 static void pvrdma_pci_remove(struct pci_dev *pdev)
1056 {
1057 	struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1058 
1059 	if (!dev)
1060 		return;
1061 
1062 	dev_info(&pdev->dev, "detaching from device\n");
1063 
1064 	unregister_netdevice_notifier(&dev->nb_netdev);
1065 	dev->nb_netdev.notifier_call = NULL;
1066 
1067 	flush_workqueue(event_wq);
1068 
1069 	if (dev->netdev) {
1070 		dev_put(dev->netdev);
1071 		dev->netdev = NULL;
1072 	}
1073 
1074 	/* Unregister ib device */
1075 	ib_unregister_device(&dev->ib_dev);
1076 
1077 	mutex_lock(&pvrdma_device_list_lock);
1078 	list_del(&dev->device_link);
1079 	mutex_unlock(&pvrdma_device_list_lock);
1080 
1081 	pvrdma_disable_intrs(dev);
1082 	pvrdma_free_irq(dev);
1083 	pci_free_irq_vectors(pdev);
1084 
1085 	/* Deactivate pvrdma device */
1086 	pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1087 	pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1088 	pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1089 	pvrdma_free_slots(dev);
1090 	dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1091 			  dev->dsrbase);
1092 
1093 	iounmap(dev->regs);
1094 	kfree(dev->sgid_tbl);
1095 	kfree(dev->cq_tbl);
1096 	kfree(dev->srq_tbl);
1097 	kfree(dev->qp_tbl);
1098 	pvrdma_uar_table_cleanup(dev);
1099 	iounmap(dev->driver_uar.map);
1100 
1101 	ib_dealloc_device(&dev->ib_dev);
1102 
1103 	/* Free pci resources */
1104 	pci_release_regions(pdev);
1105 	pci_disable_device(pdev);
1106 	pci_set_drvdata(pdev, NULL);
1107 }
1108 
1109 static const struct pci_device_id pvrdma_pci_table[] = {
1110 	{ PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1111 	{ 0 },
1112 };
1113 
1114 MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1115 
1116 static struct pci_driver pvrdma_driver = {
1117 	.name		= DRV_NAME,
1118 	.id_table	= pvrdma_pci_table,
1119 	.probe		= pvrdma_pci_probe,
1120 	.remove		= pvrdma_pci_remove,
1121 };
1122 
1123 static int __init pvrdma_init(void)
1124 {
1125 	int err;
1126 
1127 	event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1128 	if (!event_wq)
1129 		return -ENOMEM;
1130 
1131 	err = pci_register_driver(&pvrdma_driver);
1132 	if (err)
1133 		destroy_workqueue(event_wq);
1134 
1135 	return err;
1136 }
1137 
1138 static void __exit pvrdma_cleanup(void)
1139 {
1140 	pci_unregister_driver(&pvrdma_driver);
1141 
1142 	destroy_workqueue(event_wq);
1143 }
1144 
1145 module_init(pvrdma_init);
1146 module_exit(pvrdma_cleanup);
1147 
1148 MODULE_AUTHOR("VMware, Inc");
1149 MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1150 MODULE_LICENSE("Dual BSD/GPL");
1151