1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 
3 /* Authors: Cheng Xu <chengyou@linux.alibaba.com> */
4 /*          Kai Shen <kaishen@linux.alibaba.com> */
5 /* Copyright (c) 2020-2022, Alibaba Group. */
6 
7 #include <linux/module.h>
8 #include <net/addrconf.h>
9 #include <rdma/erdma-abi.h>
10 
11 #include "erdma.h"
12 #include "erdma_cm.h"
13 #include "erdma_verbs.h"
14 
15 MODULE_AUTHOR("Cheng Xu <chengyou@linux.alibaba.com>");
16 MODULE_DESCRIPTION("Alibaba elasticRDMA adapter driver");
17 MODULE_LICENSE("Dual BSD/GPL");
18 
erdma_netdev_event(struct notifier_block * nb,unsigned long event,void * arg)19 static int erdma_netdev_event(struct notifier_block *nb, unsigned long event,
20 			      void *arg)
21 {
22 	struct net_device *netdev = netdev_notifier_info_to_dev(arg);
23 	struct erdma_dev *dev = container_of(nb, struct erdma_dev, netdev_nb);
24 
25 	if (dev->netdev == NULL || dev->netdev != netdev)
26 		goto done;
27 
28 	switch (event) {
29 	case NETDEV_UP:
30 		dev->state = IB_PORT_ACTIVE;
31 		erdma_port_event(dev, IB_EVENT_PORT_ACTIVE);
32 		break;
33 	case NETDEV_DOWN:
34 		dev->state = IB_PORT_DOWN;
35 		erdma_port_event(dev, IB_EVENT_PORT_ERR);
36 		break;
37 	case NETDEV_CHANGEMTU:
38 		if (dev->mtu != netdev->mtu) {
39 			erdma_set_mtu(dev, netdev->mtu);
40 			dev->mtu = netdev->mtu;
41 		}
42 		break;
43 	case NETDEV_REGISTER:
44 	case NETDEV_UNREGISTER:
45 	case NETDEV_CHANGEADDR:
46 	case NETDEV_GOING_DOWN:
47 	case NETDEV_CHANGE:
48 	default:
49 		break;
50 	}
51 
52 done:
53 	return NOTIFY_OK;
54 }
55 
erdma_enum_and_get_netdev(struct erdma_dev * dev)56 static int erdma_enum_and_get_netdev(struct erdma_dev *dev)
57 {
58 	struct net_device *netdev;
59 	int ret = -EPROBE_DEFER;
60 
61 	/* Already binded to a net_device, so we skip. */
62 	if (dev->netdev)
63 		return 0;
64 
65 	rtnl_lock();
66 	for_each_netdev(&init_net, netdev) {
67 		/*
68 		 * In erdma, the paired netdev and ibdev should have the same
69 		 * MAC address. erdma can get the value from its PCIe bar
70 		 * registers. Since erdma can not get the paired netdev
71 		 * reference directly, we do a traverse here to get the paired
72 		 * netdev.
73 		 */
74 		if (ether_addr_equal_unaligned(netdev->perm_addr,
75 					       dev->attrs.peer_addr)) {
76 			ret = ib_device_set_netdev(&dev->ibdev, netdev, 1);
77 			if (ret) {
78 				rtnl_unlock();
79 				ibdev_warn(&dev->ibdev,
80 					   "failed (%d) to link netdev", ret);
81 				return ret;
82 			}
83 
84 			dev->netdev = netdev;
85 			break;
86 		}
87 	}
88 
89 	rtnl_unlock();
90 
91 	return ret;
92 }
93 
erdma_device_register(struct erdma_dev * dev)94 static int erdma_device_register(struct erdma_dev *dev)
95 {
96 	struct ib_device *ibdev = &dev->ibdev;
97 	int ret;
98 
99 	ret = erdma_enum_and_get_netdev(dev);
100 	if (ret)
101 		return ret;
102 
103 	dev->mtu = dev->netdev->mtu;
104 	addrconf_addr_eui48((u8 *)&ibdev->node_guid, dev->netdev->dev_addr);
105 
106 	ret = ib_register_device(ibdev, "erdma_%d", &dev->pdev->dev);
107 	if (ret) {
108 		dev_err(&dev->pdev->dev,
109 			"ib_register_device failed: ret = %d\n", ret);
110 		return ret;
111 	}
112 
113 	dev->netdev_nb.notifier_call = erdma_netdev_event;
114 	ret = register_netdevice_notifier(&dev->netdev_nb);
115 	if (ret) {
116 		ibdev_err(&dev->ibdev, "failed to register notifier.\n");
117 		ib_unregister_device(ibdev);
118 	}
119 
120 	return ret;
121 }
122 
erdma_comm_irq_handler(int irq,void * data)123 static irqreturn_t erdma_comm_irq_handler(int irq, void *data)
124 {
125 	struct erdma_dev *dev = data;
126 
127 	erdma_cmdq_completion_handler(&dev->cmdq);
128 	erdma_aeq_event_handler(dev);
129 
130 	return IRQ_HANDLED;
131 }
132 
erdma_request_vectors(struct erdma_dev * dev)133 static int erdma_request_vectors(struct erdma_dev *dev)
134 {
135 	int expect_irq_num = min(num_possible_cpus() + 1, ERDMA_NUM_MSIX_VEC);
136 	int ret;
137 
138 	ret = pci_alloc_irq_vectors(dev->pdev, 1, expect_irq_num, PCI_IRQ_MSIX);
139 	if (ret < 0) {
140 		dev_err(&dev->pdev->dev, "request irq vectors failed(%d)\n",
141 			ret);
142 		return ret;
143 	}
144 	dev->attrs.irq_num = ret;
145 
146 	return 0;
147 }
148 
erdma_comm_irq_init(struct erdma_dev * dev)149 static int erdma_comm_irq_init(struct erdma_dev *dev)
150 {
151 	snprintf(dev->comm_irq.name, ERDMA_IRQNAME_SIZE, "erdma-common@pci:%s",
152 		 pci_name(dev->pdev));
153 	dev->comm_irq.msix_vector =
154 		pci_irq_vector(dev->pdev, ERDMA_MSIX_VECTOR_CMDQ);
155 
156 	cpumask_set_cpu(cpumask_first(cpumask_of_pcibus(dev->pdev->bus)),
157 			&dev->comm_irq.affinity_hint_mask);
158 	irq_set_affinity_hint(dev->comm_irq.msix_vector,
159 			      &dev->comm_irq.affinity_hint_mask);
160 
161 	return request_irq(dev->comm_irq.msix_vector, erdma_comm_irq_handler, 0,
162 			   dev->comm_irq.name, dev);
163 }
164 
erdma_comm_irq_uninit(struct erdma_dev * dev)165 static void erdma_comm_irq_uninit(struct erdma_dev *dev)
166 {
167 	irq_set_affinity_hint(dev->comm_irq.msix_vector, NULL);
168 	free_irq(dev->comm_irq.msix_vector, dev);
169 }
170 
erdma_device_init(struct erdma_dev * dev,struct pci_dev * pdev)171 static int erdma_device_init(struct erdma_dev *dev, struct pci_dev *pdev)
172 {
173 	int ret;
174 
175 	ret = dma_set_mask_and_coherent(&pdev->dev,
176 					DMA_BIT_MASK(ERDMA_PCI_WIDTH));
177 	if (ret)
178 		return ret;
179 
180 	dma_set_max_seg_size(&pdev->dev, UINT_MAX);
181 
182 	return 0;
183 }
184 
erdma_hw_reset(struct erdma_dev * dev)185 static void erdma_hw_reset(struct erdma_dev *dev)
186 {
187 	u32 ctrl = FIELD_PREP(ERDMA_REG_DEV_CTRL_RESET_MASK, 1);
188 
189 	erdma_reg_write32(dev, ERDMA_REGS_DEV_CTRL_REG, ctrl);
190 }
191 
erdma_wait_hw_init_done(struct erdma_dev * dev)192 static int erdma_wait_hw_init_done(struct erdma_dev *dev)
193 {
194 	int i;
195 
196 	erdma_reg_write32(dev, ERDMA_REGS_DEV_CTRL_REG,
197 			  FIELD_PREP(ERDMA_REG_DEV_CTRL_INIT_MASK, 1));
198 
199 	for (i = 0; i < ERDMA_WAIT_DEV_DONE_CNT; i++) {
200 		if (erdma_reg_read32_filed(dev, ERDMA_REGS_DEV_ST_REG,
201 					   ERDMA_REG_DEV_ST_INIT_DONE_MASK))
202 			break;
203 
204 		msleep(ERDMA_REG_ACCESS_WAIT_MS);
205 	}
206 
207 	if (i == ERDMA_WAIT_DEV_DONE_CNT) {
208 		dev_err(&dev->pdev->dev, "wait init done failed.\n");
209 		return -ETIMEDOUT;
210 	}
211 
212 	return 0;
213 }
214 
215 static const struct pci_device_id erdma_pci_tbl[] = {
216 	{ PCI_DEVICE(PCI_VENDOR_ID_ALIBABA, 0x107f) },
217 	{}
218 };
219 
erdma_probe_dev(struct pci_dev * pdev)220 static int erdma_probe_dev(struct pci_dev *pdev)
221 {
222 	struct erdma_dev *dev;
223 	int bars, err;
224 	u32 version;
225 
226 	err = pci_enable_device(pdev);
227 	if (err) {
228 		dev_err(&pdev->dev, "pci_enable_device failed(%d)\n", err);
229 		return err;
230 	}
231 
232 	pci_set_master(pdev);
233 
234 	dev = ib_alloc_device(erdma_dev, ibdev);
235 	if (!dev) {
236 		dev_err(&pdev->dev, "ib_alloc_device failed\n");
237 		err = -ENOMEM;
238 		goto err_disable_device;
239 	}
240 
241 	pci_set_drvdata(pdev, dev);
242 	dev->pdev = pdev;
243 	dev->attrs.numa_node = dev_to_node(&pdev->dev);
244 
245 	bars = pci_select_bars(pdev, IORESOURCE_MEM);
246 	err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
247 	if (bars != ERDMA_BAR_MASK || err) {
248 		err = err ? err : -EINVAL;
249 		goto err_ib_device_release;
250 	}
251 
252 	dev->func_bar_addr = pci_resource_start(pdev, ERDMA_FUNC_BAR);
253 	dev->func_bar_len = pci_resource_len(pdev, ERDMA_FUNC_BAR);
254 
255 	dev->func_bar =
256 		devm_ioremap(&pdev->dev, dev->func_bar_addr, dev->func_bar_len);
257 	if (!dev->func_bar) {
258 		dev_err(&pdev->dev, "devm_ioremap failed.\n");
259 		err = -EFAULT;
260 		goto err_release_bars;
261 	}
262 
263 	version = erdma_reg_read32(dev, ERDMA_REGS_VERSION_REG);
264 	if (version == 0) {
265 		/* we knows that it is a non-functional function. */
266 		err = -ENODEV;
267 		goto err_iounmap_func_bar;
268 	}
269 
270 	err = erdma_device_init(dev, pdev);
271 	if (err)
272 		goto err_iounmap_func_bar;
273 
274 	err = erdma_request_vectors(dev);
275 	if (err)
276 		goto err_iounmap_func_bar;
277 
278 	err = erdma_comm_irq_init(dev);
279 	if (err)
280 		goto err_free_vectors;
281 
282 	err = erdma_aeq_init(dev);
283 	if (err)
284 		goto err_uninit_comm_irq;
285 
286 	err = erdma_cmdq_init(dev);
287 	if (err)
288 		goto err_uninit_aeq;
289 
290 	err = erdma_wait_hw_init_done(dev);
291 	if (err)
292 		goto err_uninit_cmdq;
293 
294 	err = erdma_ceqs_init(dev);
295 	if (err)
296 		goto err_reset_hw;
297 
298 	erdma_finish_cmdq_init(dev);
299 
300 	return 0;
301 
302 err_reset_hw:
303 	erdma_hw_reset(dev);
304 
305 err_uninit_cmdq:
306 	erdma_cmdq_destroy(dev);
307 
308 err_uninit_aeq:
309 	erdma_aeq_destroy(dev);
310 
311 err_uninit_comm_irq:
312 	erdma_comm_irq_uninit(dev);
313 
314 err_free_vectors:
315 	pci_free_irq_vectors(dev->pdev);
316 
317 err_iounmap_func_bar:
318 	devm_iounmap(&pdev->dev, dev->func_bar);
319 
320 err_release_bars:
321 	pci_release_selected_regions(pdev, bars);
322 
323 err_ib_device_release:
324 	ib_dealloc_device(&dev->ibdev);
325 
326 err_disable_device:
327 	pci_disable_device(pdev);
328 
329 	return err;
330 }
331 
erdma_remove_dev(struct pci_dev * pdev)332 static void erdma_remove_dev(struct pci_dev *pdev)
333 {
334 	struct erdma_dev *dev = pci_get_drvdata(pdev);
335 
336 	erdma_ceqs_uninit(dev);
337 	erdma_hw_reset(dev);
338 	erdma_cmdq_destroy(dev);
339 	erdma_aeq_destroy(dev);
340 	erdma_comm_irq_uninit(dev);
341 	pci_free_irq_vectors(dev->pdev);
342 
343 	devm_iounmap(&pdev->dev, dev->func_bar);
344 	pci_release_selected_regions(pdev, ERDMA_BAR_MASK);
345 
346 	ib_dealloc_device(&dev->ibdev);
347 
348 	pci_disable_device(pdev);
349 }
350 
351 #define ERDMA_GET_CAP(name, cap) FIELD_GET(ERDMA_CMD_DEV_CAP_##name##_MASK, cap)
352 
erdma_dev_attrs_init(struct erdma_dev * dev)353 static int erdma_dev_attrs_init(struct erdma_dev *dev)
354 {
355 	int err;
356 	u64 req_hdr, cap0, cap1;
357 
358 	erdma_cmdq_build_reqhdr(&req_hdr, CMDQ_SUBMOD_RDMA,
359 				CMDQ_OPCODE_QUERY_DEVICE);
360 
361 	err = erdma_post_cmd_wait(&dev->cmdq, &req_hdr, sizeof(req_hdr), &cap0,
362 				  &cap1);
363 	if (err)
364 		return err;
365 
366 	dev->attrs.max_cqe = 1 << ERDMA_GET_CAP(MAX_CQE, cap0);
367 	dev->attrs.max_mr_size = 1ULL << ERDMA_GET_CAP(MAX_MR_SIZE, cap0);
368 	dev->attrs.max_mw = 1 << ERDMA_GET_CAP(MAX_MW, cap1);
369 	dev->attrs.max_recv_wr = 1 << ERDMA_GET_CAP(MAX_RECV_WR, cap0);
370 	dev->attrs.local_dma_key = ERDMA_GET_CAP(DMA_LOCAL_KEY, cap1);
371 	dev->attrs.cc = ERDMA_GET_CAP(DEFAULT_CC, cap1);
372 	dev->attrs.max_qp = ERDMA_NQP_PER_QBLOCK * ERDMA_GET_CAP(QBLOCK, cap1);
373 	dev->attrs.max_mr = dev->attrs.max_qp << 1;
374 	dev->attrs.max_cq = dev->attrs.max_qp << 1;
375 	dev->attrs.cap_flags = ERDMA_GET_CAP(FLAGS, cap0);
376 
377 	dev->attrs.max_send_wr = ERDMA_MAX_SEND_WR;
378 	dev->attrs.max_ord = ERDMA_MAX_ORD;
379 	dev->attrs.max_ird = ERDMA_MAX_IRD;
380 	dev->attrs.max_send_sge = ERDMA_MAX_SEND_SGE;
381 	dev->attrs.max_recv_sge = ERDMA_MAX_RECV_SGE;
382 	dev->attrs.max_sge_rd = ERDMA_MAX_SGE_RD;
383 	dev->attrs.max_pd = ERDMA_MAX_PD;
384 
385 	dev->res_cb[ERDMA_RES_TYPE_PD].max_cap = ERDMA_MAX_PD;
386 	dev->res_cb[ERDMA_RES_TYPE_STAG_IDX].max_cap = dev->attrs.max_mr;
387 
388 	erdma_cmdq_build_reqhdr(&req_hdr, CMDQ_SUBMOD_COMMON,
389 				CMDQ_OPCODE_QUERY_FW_INFO);
390 
391 	err = erdma_post_cmd_wait(&dev->cmdq, &req_hdr, sizeof(req_hdr), &cap0,
392 				  &cap1);
393 	if (!err)
394 		dev->attrs.fw_version =
395 			FIELD_GET(ERDMA_CMD_INFO0_FW_VER_MASK, cap0);
396 
397 	return err;
398 }
399 
erdma_device_config(struct erdma_dev * dev)400 static int erdma_device_config(struct erdma_dev *dev)
401 {
402 	struct erdma_cmdq_config_device_req req = {};
403 
404 	if (!(dev->attrs.cap_flags & ERDMA_DEV_CAP_FLAGS_EXTEND_DB))
405 		return 0;
406 
407 	erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON,
408 				CMDQ_OPCODE_CONF_DEVICE);
409 
410 	req.cfg = FIELD_PREP(ERDMA_CMD_CONFIG_DEVICE_PGSHIFT_MASK, PAGE_SHIFT) |
411 		  FIELD_PREP(ERDMA_CMD_CONFIG_DEVICE_PS_EN_MASK, 1);
412 
413 	return erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL);
414 }
415 
erdma_res_cb_init(struct erdma_dev * dev)416 static int erdma_res_cb_init(struct erdma_dev *dev)
417 {
418 	int i, j;
419 
420 	for (i = 0; i < ERDMA_RES_CNT; i++) {
421 		dev->res_cb[i].next_alloc_idx = 1;
422 		spin_lock_init(&dev->res_cb[i].lock);
423 		dev->res_cb[i].bitmap =
424 			bitmap_zalloc(dev->res_cb[i].max_cap, GFP_KERNEL);
425 		if (!dev->res_cb[i].bitmap)
426 			goto err;
427 	}
428 
429 	return 0;
430 
431 err:
432 	for (j = 0; j < i; j++)
433 		bitmap_free(dev->res_cb[j].bitmap);
434 
435 	return -ENOMEM;
436 }
437 
erdma_res_cb_free(struct erdma_dev * dev)438 static void erdma_res_cb_free(struct erdma_dev *dev)
439 {
440 	int i;
441 
442 	for (i = 0; i < ERDMA_RES_CNT; i++)
443 		bitmap_free(dev->res_cb[i].bitmap);
444 }
445 
446 static const struct ib_device_ops erdma_device_ops = {
447 	.owner = THIS_MODULE,
448 	.driver_id = RDMA_DRIVER_ERDMA,
449 	.uverbs_abi_ver = ERDMA_ABI_VERSION,
450 
451 	.alloc_mr = erdma_ib_alloc_mr,
452 	.alloc_pd = erdma_alloc_pd,
453 	.alloc_ucontext = erdma_alloc_ucontext,
454 	.create_cq = erdma_create_cq,
455 	.create_qp = erdma_create_qp,
456 	.dealloc_pd = erdma_dealloc_pd,
457 	.dealloc_ucontext = erdma_dealloc_ucontext,
458 	.dereg_mr = erdma_dereg_mr,
459 	.destroy_cq = erdma_destroy_cq,
460 	.destroy_qp = erdma_destroy_qp,
461 	.get_dma_mr = erdma_get_dma_mr,
462 	.get_port_immutable = erdma_get_port_immutable,
463 	.iw_accept = erdma_accept,
464 	.iw_add_ref = erdma_qp_get_ref,
465 	.iw_connect = erdma_connect,
466 	.iw_create_listen = erdma_create_listen,
467 	.iw_destroy_listen = erdma_destroy_listen,
468 	.iw_get_qp = erdma_get_ibqp,
469 	.iw_reject = erdma_reject,
470 	.iw_rem_ref = erdma_qp_put_ref,
471 	.map_mr_sg = erdma_map_mr_sg,
472 	.mmap = erdma_mmap,
473 	.mmap_free = erdma_mmap_free,
474 	.modify_qp = erdma_modify_qp,
475 	.post_recv = erdma_post_recv,
476 	.post_send = erdma_post_send,
477 	.poll_cq = erdma_poll_cq,
478 	.query_device = erdma_query_device,
479 	.query_gid = erdma_query_gid,
480 	.query_port = erdma_query_port,
481 	.query_qp = erdma_query_qp,
482 	.req_notify_cq = erdma_req_notify_cq,
483 	.reg_user_mr = erdma_reg_user_mr,
484 
485 	INIT_RDMA_OBJ_SIZE(ib_cq, erdma_cq, ibcq),
486 	INIT_RDMA_OBJ_SIZE(ib_pd, erdma_pd, ibpd),
487 	INIT_RDMA_OBJ_SIZE(ib_ucontext, erdma_ucontext, ibucontext),
488 	INIT_RDMA_OBJ_SIZE(ib_qp, erdma_qp, ibqp),
489 };
490 
erdma_ib_device_add(struct pci_dev * pdev)491 static int erdma_ib_device_add(struct pci_dev *pdev)
492 {
493 	struct erdma_dev *dev = pci_get_drvdata(pdev);
494 	struct ib_device *ibdev = &dev->ibdev;
495 	u64 mac;
496 	int ret;
497 
498 	ret = erdma_dev_attrs_init(dev);
499 	if (ret)
500 		return ret;
501 
502 	ret = erdma_device_config(dev);
503 	if (ret)
504 		return ret;
505 
506 	ibdev->node_type = RDMA_NODE_RNIC;
507 	memcpy(ibdev->node_desc, ERDMA_NODE_DESC, sizeof(ERDMA_NODE_DESC));
508 
509 	/*
510 	 * Current model (one-to-one device association):
511 	 * One ERDMA device per net_device or, equivalently,
512 	 * per physical port.
513 	 */
514 	ibdev->phys_port_cnt = 1;
515 	ibdev->num_comp_vectors = dev->attrs.irq_num - 1;
516 
517 	ib_set_device_ops(ibdev, &erdma_device_ops);
518 
519 	INIT_LIST_HEAD(&dev->cep_list);
520 
521 	spin_lock_init(&dev->lock);
522 	xa_init_flags(&dev->qp_xa, XA_FLAGS_ALLOC1);
523 	xa_init_flags(&dev->cq_xa, XA_FLAGS_ALLOC1);
524 	dev->next_alloc_cqn = 1;
525 	dev->next_alloc_qpn = 1;
526 
527 	ret = erdma_res_cb_init(dev);
528 	if (ret)
529 		return ret;
530 
531 	atomic_set(&dev->num_ctx, 0);
532 
533 	mac = erdma_reg_read32(dev, ERDMA_REGS_NETDEV_MAC_L_REG);
534 	mac |= (u64)erdma_reg_read32(dev, ERDMA_REGS_NETDEV_MAC_H_REG) << 32;
535 
536 	u64_to_ether_addr(mac, dev->attrs.peer_addr);
537 
538 	dev->reflush_wq = alloc_workqueue("erdma-reflush-wq", WQ_UNBOUND,
539 					  WQ_UNBOUND_MAX_ACTIVE);
540 	if (!dev->reflush_wq) {
541 		ret = -ENOMEM;
542 		goto err_alloc_workqueue;
543 	}
544 
545 	ret = erdma_device_register(dev);
546 	if (ret)
547 		goto err_register;
548 
549 	return 0;
550 
551 err_register:
552 	destroy_workqueue(dev->reflush_wq);
553 err_alloc_workqueue:
554 	xa_destroy(&dev->qp_xa);
555 	xa_destroy(&dev->cq_xa);
556 
557 	erdma_res_cb_free(dev);
558 
559 	return ret;
560 }
561 
erdma_ib_device_remove(struct pci_dev * pdev)562 static void erdma_ib_device_remove(struct pci_dev *pdev)
563 {
564 	struct erdma_dev *dev = pci_get_drvdata(pdev);
565 
566 	unregister_netdevice_notifier(&dev->netdev_nb);
567 	ib_unregister_device(&dev->ibdev);
568 
569 	destroy_workqueue(dev->reflush_wq);
570 	erdma_res_cb_free(dev);
571 	xa_destroy(&dev->qp_xa);
572 	xa_destroy(&dev->cq_xa);
573 }
574 
erdma_probe(struct pci_dev * pdev,const struct pci_device_id * ent)575 static int erdma_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
576 {
577 	int ret;
578 
579 	ret = erdma_probe_dev(pdev);
580 	if (ret)
581 		return ret;
582 
583 	ret = erdma_ib_device_add(pdev);
584 	if (ret) {
585 		erdma_remove_dev(pdev);
586 		return ret;
587 	}
588 
589 	return 0;
590 }
591 
erdma_remove(struct pci_dev * pdev)592 static void erdma_remove(struct pci_dev *pdev)
593 {
594 	erdma_ib_device_remove(pdev);
595 	erdma_remove_dev(pdev);
596 }
597 
598 static struct pci_driver erdma_pci_driver = {
599 	.name = DRV_MODULE_NAME,
600 	.id_table = erdma_pci_tbl,
601 	.probe = erdma_probe,
602 	.remove = erdma_remove
603 };
604 
605 MODULE_DEVICE_TABLE(pci, erdma_pci_tbl);
606 
erdma_init_module(void)607 static __init int erdma_init_module(void)
608 {
609 	int ret;
610 
611 	ret = erdma_cm_init();
612 	if (ret)
613 		return ret;
614 
615 	ret = pci_register_driver(&erdma_pci_driver);
616 	if (ret)
617 		erdma_cm_exit();
618 
619 	return ret;
620 }
621 
erdma_exit_module(void)622 static void __exit erdma_exit_module(void)
623 {
624 	pci_unregister_driver(&erdma_pci_driver);
625 
626 	erdma_cm_exit();
627 }
628 
629 module_init(erdma_init_module);
630 module_exit(erdma_exit_module);
631