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