1// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
2/*
3 * Copyright 2018-2025 Amazon.com, Inc. or its affiliates. All rights reserved.
4 */
5
6#include <linux/module.h>
7#include <linux/pci.h>
8#include <linux/utsname.h>
9#include <linux/version.h>
10
11#include <rdma/ib_user_verbs.h>
12#include <rdma/uverbs_ioctl.h>
13
14#include "efa.h"
15
16#define PCI_DEV_ID_EFA0_VF 0xefa0
17#define PCI_DEV_ID_EFA1_VF 0xefa1
18#define PCI_DEV_ID_EFA2_VF 0xefa2
19#define PCI_DEV_ID_EFA3_VF 0xefa3
20
21static const struct pci_device_id efa_pci_tbl[] = {
22 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA0_VF) },
23 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA1_VF) },
24 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA2_VF) },
25 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA3_VF) },
26 { }
27};
28
29MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
30MODULE_LICENSE("Dual BSD/GPL");
31MODULE_DESCRIPTION(DEVICE_NAME);
32MODULE_DEVICE_TABLE(pci, efa_pci_tbl);
33
34#define EFA_REG_BAR 0
35#define EFA_MEM_BAR 2
36#define EFA_BASE_BAR_MASK (BIT(EFA_REG_BAR) | BIT(EFA_MEM_BAR))
37
38#define EFA_AENQ_ENABLED_GROUPS \
39 (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
40 BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
41
42extern const struct uapi_definition efa_uapi_defs[];
43
44/* This handler will called for unknown event group or unimplemented handlers */
45static void unimplemented_aenq_handler(void *data,
46 struct efa_admin_aenq_entry *aenq_e)
47{
48 struct efa_dev *dev = (struct efa_dev *)data;
49
50 ibdev_err(ibdev: &dev->ibdev,
51 format: "Unknown event was received or event with unimplemented handler\n");
52}
53
54static void efa_keep_alive(void *data, struct efa_admin_aenq_entry *aenq_e)
55{
56 struct efa_dev *dev = (struct efa_dev *)data;
57
58 atomic64_inc(v: &dev->stats.keep_alive_rcvd);
59}
60
61static struct efa_aenq_handlers aenq_handlers = {
62 .handlers = {
63 [EFA_ADMIN_KEEP_ALIVE] = efa_keep_alive,
64 },
65 .unimplemented_handler = unimplemented_aenq_handler
66};
67
68static void efa_release_bars(struct efa_dev *dev, int bars_mask)
69{
70 struct pci_dev *pdev = dev->pdev;
71 int release_bars;
72
73 release_bars = pci_select_bars(dev: pdev, IORESOURCE_MEM) & bars_mask;
74 pci_release_selected_regions(pdev, release_bars);
75}
76
77static void efa_process_comp_eqe(struct efa_dev *dev, struct efa_admin_eqe *eqe)
78{
79 u16 cqn = eqe->u.comp_event.cqn;
80 struct efa_cq *cq;
81
82 /* Safe to load as we're in irq and removal calls synchronize_irq() */
83 cq = xa_load(&dev->cqs_xa, index: cqn);
84 if (unlikely(!cq)) {
85 ibdev_err_ratelimited(&dev->ibdev,
86 "Completion event on non-existent CQ[%u]",
87 cqn);
88 return;
89 }
90
91 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
92}
93
94static void efa_process_eqe(struct efa_com_eq *eeq, struct efa_admin_eqe *eqe)
95{
96 struct efa_dev *dev = container_of(eeq->edev, struct efa_dev, edev);
97
98 if (likely(EFA_GET(&eqe->common, EFA_ADMIN_EQE_EVENT_TYPE) ==
99 EFA_ADMIN_EQE_EVENT_TYPE_COMPLETION))
100 efa_process_comp_eqe(dev, eqe);
101 else
102 ibdev_err_ratelimited(&dev->ibdev,
103 "Unknown event type received %lu",
104 EFA_GET(&eqe->common,
105 EFA_ADMIN_EQE_EVENT_TYPE));
106}
107
108static irqreturn_t efa_intr_msix_comp(int irq, void *data)
109{
110 struct efa_eq *eq = data;
111 struct efa_com_dev *edev = eq->eeq.edev;
112
113 efa_com_eq_comp_intr_handler(edev, eeq: &eq->eeq);
114
115 return IRQ_HANDLED;
116}
117
118static irqreturn_t efa_intr_msix_mgmnt(int irq, void *data)
119{
120 struct efa_dev *dev = data;
121
122 efa_com_admin_q_comp_intr_handler(edev: &dev->edev);
123 efa_com_aenq_intr_handler(edev: &dev->edev, data);
124
125 return IRQ_HANDLED;
126}
127
128static int efa_request_irq(struct efa_dev *dev, struct efa_irq *irq)
129{
130 int err;
131
132 err = request_irq(irq: irq->irqn, handler: irq->handler, flags: 0, name: irq->name, dev: irq->data);
133 if (err) {
134 dev_err(&dev->pdev->dev, "Failed to request irq %s (%d)\n",
135 irq->name, err);
136 return err;
137 }
138
139 irq_set_affinity_hint(irq: irq->irqn, m: &irq->affinity_hint_mask);
140
141 return 0;
142}
143
144static void efa_setup_comp_irq(struct efa_dev *dev, struct efa_eq *eq, u32 vector)
145{
146 u32 cpu;
147
148 cpu = vector - EFA_COMP_EQS_VEC_BASE;
149 snprintf(buf: eq->irq.name, EFA_IRQNAME_SIZE, fmt: "efa-comp%d@pci:%s", cpu,
150 pci_name(pdev: dev->pdev));
151 eq->irq.handler = efa_intr_msix_comp;
152 eq->irq.data = eq;
153 eq->irq.vector = vector;
154 eq->irq.irqn = pci_irq_vector(dev: dev->pdev, nr: vector);
155 cpumask_set_cpu(cpu, dstp: &eq->irq.affinity_hint_mask);
156}
157
158static void efa_free_irq(struct efa_dev *dev, struct efa_irq *irq)
159{
160 irq_set_affinity_hint(irq: irq->irqn, NULL);
161 free_irq(irq->irqn, irq->data);
162}
163
164static void efa_setup_mgmnt_irq(struct efa_dev *dev)
165{
166 u32 cpu;
167
168 snprintf(buf: dev->admin_irq.name, EFA_IRQNAME_SIZE,
169 fmt: "efa-mgmnt@pci:%s", pci_name(pdev: dev->pdev));
170 dev->admin_irq.handler = efa_intr_msix_mgmnt;
171 dev->admin_irq.data = dev;
172 dev->admin_irq.vector = dev->admin_msix_vector_idx;
173 dev->admin_irq.irqn = pci_irq_vector(dev: dev->pdev,
174 nr: dev->admin_msix_vector_idx);
175 cpu = cpumask_first(cpu_online_mask);
176 cpumask_set_cpu(cpu,
177 dstp: &dev->admin_irq.affinity_hint_mask);
178 dev_info(&dev->pdev->dev, "Setup irq:%d name:%s\n",
179 dev->admin_irq.irqn,
180 dev->admin_irq.name);
181}
182
183static int efa_set_mgmnt_irq(struct efa_dev *dev)
184{
185 efa_setup_mgmnt_irq(dev);
186
187 return efa_request_irq(dev, irq: &dev->admin_irq);
188}
189
190static int efa_request_doorbell_bar(struct efa_dev *dev)
191{
192 u8 db_bar_idx = dev->dev_attr.db_bar;
193 struct pci_dev *pdev = dev->pdev;
194 int pci_mem_bars;
195 int db_bar;
196 int err;
197
198 db_bar = BIT(db_bar_idx);
199 if (!(db_bar & EFA_BASE_BAR_MASK)) {
200 pci_mem_bars = pci_select_bars(dev: pdev, IORESOURCE_MEM);
201 if (db_bar & ~pci_mem_bars) {
202 dev_err(&pdev->dev,
203 "Doorbells BAR unavailable. Requested %#x, available %#x\n",
204 db_bar, pci_mem_bars);
205 return -ENODEV;
206 }
207
208 err = pci_request_selected_regions(pdev, db_bar, DRV_MODULE_NAME);
209 if (err) {
210 dev_err(&pdev->dev,
211 "pci_request_selected_regions for bar %d failed %d\n",
212 db_bar_idx, err);
213 return err;
214 }
215 }
216
217 dev->db_bar_addr = pci_resource_start(dev->pdev, db_bar_idx);
218 dev->db_bar_len = pci_resource_len(dev->pdev, db_bar_idx);
219
220 return 0;
221}
222
223static void efa_release_doorbell_bar(struct efa_dev *dev)
224{
225 if (!(BIT(dev->dev_attr.db_bar) & EFA_BASE_BAR_MASK))
226 efa_release_bars(dev, BIT(dev->dev_attr.db_bar));
227}
228
229static void efa_update_hw_hints(struct efa_dev *dev,
230 struct efa_com_get_hw_hints_result *hw_hints)
231{
232 struct efa_com_dev *edev = &dev->edev;
233
234 if (hw_hints->mmio_read_timeout)
235 edev->mmio_read.mmio_read_timeout =
236 hw_hints->mmio_read_timeout * 1000;
237
238 if (hw_hints->poll_interval)
239 edev->aq.poll_interval = hw_hints->poll_interval;
240
241 if (hw_hints->admin_completion_timeout)
242 edev->aq.completion_timeout =
243 hw_hints->admin_completion_timeout;
244}
245
246static void efa_stats_init(struct efa_dev *dev)
247{
248 atomic64_t *s = (atomic64_t *)&dev->stats;
249 int i;
250
251 for (i = 0; i < sizeof(dev->stats) / sizeof(*s); i++, s++)
252 atomic64_set(v: s, i: 0);
253}
254
255static void efa_set_host_info(struct efa_dev *dev)
256{
257 struct efa_admin_set_feature_resp resp = {};
258 struct efa_admin_set_feature_cmd cmd = {};
259 struct efa_admin_host_info *hinf;
260 u32 bufsz = sizeof(*hinf);
261 dma_addr_t hinf_dma;
262
263 if (!efa_com_check_supported_feature_id(edev: &dev->edev,
264 feature_id: EFA_ADMIN_HOST_INFO))
265 return;
266
267 /* Failures in host info set shall not disturb probe */
268 hinf = dma_alloc_coherent(dev: &dev->pdev->dev, size: bufsz, dma_handle: &hinf_dma,
269 GFP_KERNEL);
270 if (!hinf)
271 return;
272
273 strscpy(hinf->os_dist_str, utsname()->release,
274 sizeof(hinf->os_dist_str));
275 hinf->os_type = EFA_ADMIN_OS_LINUX;
276 strscpy(hinf->kernel_ver_str, utsname()->version,
277 sizeof(hinf->kernel_ver_str));
278 hinf->kernel_ver = LINUX_VERSION_CODE;
279 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MAJOR, 0);
280 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MINOR, 0);
281 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_SUB_MINOR, 0);
282 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MODULE_TYPE, 0);
283 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_BUS, dev->pdev->bus->number);
284 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_DEVICE,
285 PCI_SLOT(dev->pdev->devfn));
286 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_FUNCTION,
287 PCI_FUNC(dev->pdev->devfn));
288 EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MAJOR,
289 EFA_COMMON_SPEC_VERSION_MAJOR);
290 EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MINOR,
291 EFA_COMMON_SPEC_VERSION_MINOR);
292 EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_INTREE, 1);
293 EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_GDR, 0);
294
295 efa_com_set_feature_ex(edev: &dev->edev, set_resp: &resp, set_cmd: &cmd, feature_id: EFA_ADMIN_HOST_INFO,
296 control_buf_dma_addr: hinf_dma, control_buff_size: bufsz);
297
298 dma_free_coherent(dev: &dev->pdev->dev, size: bufsz, cpu_addr: hinf, dma_handle: hinf_dma);
299}
300
301static void efa_destroy_eq(struct efa_dev *dev, struct efa_eq *eq)
302{
303 efa_com_eq_destroy(edev: &dev->edev, eeq: &eq->eeq);
304 efa_free_irq(dev, irq: &eq->irq);
305}
306
307static int efa_create_eq(struct efa_dev *dev, struct efa_eq *eq, u32 msix_vec)
308{
309 int err;
310
311 efa_setup_comp_irq(dev, eq, vector: msix_vec);
312 err = efa_request_irq(dev, irq: &eq->irq);
313 if (err)
314 return err;
315
316 err = efa_com_eq_init(edev: &dev->edev, eeq: &eq->eeq, cb: efa_process_eqe,
317 depth: dev->dev_attr.max_eq_depth, msix_vec);
318 if (err)
319 goto err_free_comp_irq;
320
321 return 0;
322
323err_free_comp_irq:
324 efa_free_irq(dev, irq: &eq->irq);
325 return err;
326}
327
328static int efa_create_eqs(struct efa_dev *dev)
329{
330 u32 neqs = dev->dev_attr.max_eq;
331 int err, i;
332
333 neqs = min_t(u32, neqs, dev->num_irq_vectors - EFA_COMP_EQS_VEC_BASE);
334 dev->neqs = neqs;
335 dev->eqs = kcalloc(neqs, sizeof(*dev->eqs), GFP_KERNEL);
336 if (!dev->eqs)
337 return -ENOMEM;
338
339 for (i = 0; i < neqs; i++) {
340 err = efa_create_eq(dev, eq: &dev->eqs[i], msix_vec: i + EFA_COMP_EQS_VEC_BASE);
341 if (err)
342 goto err_destroy_eqs;
343 }
344
345 return 0;
346
347err_destroy_eqs:
348 for (i--; i >= 0; i--)
349 efa_destroy_eq(dev, eq: &dev->eqs[i]);
350 kfree(objp: dev->eqs);
351
352 return err;
353}
354
355static void efa_destroy_eqs(struct efa_dev *dev)
356{
357 int i;
358
359 for (i = 0; i < dev->neqs; i++)
360 efa_destroy_eq(dev, eq: &dev->eqs[i]);
361
362 kfree(objp: dev->eqs);
363}
364
365static const struct ib_device_ops efa_dev_ops = {
366 .owner = THIS_MODULE,
367 .driver_id = RDMA_DRIVER_EFA,
368 .uverbs_abi_ver = EFA_UVERBS_ABI_VERSION,
369
370 .alloc_hw_port_stats = efa_alloc_hw_port_stats,
371 .alloc_hw_device_stats = efa_alloc_hw_device_stats,
372 .alloc_pd = efa_alloc_pd,
373 .alloc_ucontext = efa_alloc_ucontext,
374 .create_cq = efa_create_cq,
375 .create_cq_umem = efa_create_cq_umem,
376 .create_qp = efa_create_qp,
377 .create_user_ah = efa_create_ah,
378 .dealloc_pd = efa_dealloc_pd,
379 .dealloc_ucontext = efa_dealloc_ucontext,
380 .dereg_mr = efa_dereg_mr,
381 .destroy_ah = efa_destroy_ah,
382 .destroy_cq = efa_destroy_cq,
383 .destroy_qp = efa_destroy_qp,
384 .get_hw_stats = efa_get_hw_stats,
385 .get_link_layer = efa_port_link_layer,
386 .get_port_immutable = efa_get_port_immutable,
387 .mmap = efa_mmap,
388 .mmap_free = efa_mmap_free,
389 .modify_qp = efa_modify_qp,
390 .query_device = efa_query_device,
391 .query_gid = efa_query_gid,
392 .query_pkey = efa_query_pkey,
393 .query_port = efa_query_port,
394 .query_qp = efa_query_qp,
395 .reg_user_mr = efa_reg_mr,
396 .reg_user_mr_dmabuf = efa_reg_user_mr_dmabuf,
397
398 INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah),
399 INIT_RDMA_OBJ_SIZE(ib_cq, efa_cq, ibcq),
400 INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd),
401 INIT_RDMA_OBJ_SIZE(ib_qp, efa_qp, ibqp),
402 INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext),
403};
404
405static int efa_ib_device_add(struct efa_dev *dev)
406{
407 struct efa_com_get_hw_hints_result hw_hints;
408 struct pci_dev *pdev = dev->pdev;
409 int err;
410
411 efa_stats_init(dev);
412
413 err = efa_com_get_device_attr(edev: &dev->edev, result: &dev->dev_attr);
414 if (err)
415 return err;
416
417 dev_dbg(&dev->pdev->dev, "Doorbells bar (%d)\n", dev->dev_attr.db_bar);
418 err = efa_request_doorbell_bar(dev);
419 if (err)
420 return err;
421
422 err = efa_com_get_hw_hints(edev: &dev->edev, result: &hw_hints);
423 if (err)
424 goto err_release_doorbell_bar;
425
426 efa_update_hw_hints(dev, hw_hints: &hw_hints);
427
428 /* Try to enable all the available aenq groups */
429 err = efa_com_set_aenq_config(edev: &dev->edev, EFA_AENQ_ENABLED_GROUPS);
430 if (err)
431 goto err_release_doorbell_bar;
432
433 err = efa_create_eqs(dev);
434 if (err)
435 goto err_release_doorbell_bar;
436
437 efa_set_host_info(dev);
438
439 dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED;
440 dev->ibdev.node_guid = dev->dev_attr.guid;
441 dev->ibdev.phys_port_cnt = 1;
442 dev->ibdev.num_comp_vectors = dev->neqs ?: 1;
443 dev->ibdev.dev.parent = &pdev->dev;
444
445 ib_set_device_ops(device: &dev->ibdev, ops: &efa_dev_ops);
446
447 dev->ibdev.driver_def = efa_uapi_defs;
448
449 err = ib_register_device(device: &dev->ibdev, name: "efa_%d", dma_device: &pdev->dev);
450 if (err)
451 goto err_destroy_eqs;
452
453 ibdev_info(ibdev: &dev->ibdev, format: "IB device registered\n");
454
455 return 0;
456
457err_destroy_eqs:
458 efa_destroy_eqs(dev);
459err_release_doorbell_bar:
460 efa_release_doorbell_bar(dev);
461 return err;
462}
463
464static void efa_ib_device_remove(struct efa_dev *dev)
465{
466 ibdev_info(ibdev: &dev->ibdev, format: "Unregister ib device\n");
467 ib_unregister_device(device: &dev->ibdev);
468 efa_destroy_eqs(dev);
469 efa_release_doorbell_bar(dev);
470}
471
472static void efa_disable_msix(struct efa_dev *dev)
473{
474 pci_free_irq_vectors(dev: dev->pdev);
475}
476
477static int efa_enable_msix(struct efa_dev *dev)
478{
479 int max_vecs, num_vecs;
480
481 /*
482 * Reserve the max msix vectors we might need, one vector is reserved
483 * for admin.
484 */
485 max_vecs = min_t(int, pci_msix_vec_count(dev->pdev),
486 num_online_cpus() + 1);
487 dev_dbg(&dev->pdev->dev, "Trying to enable MSI-X, vectors %d\n",
488 max_vecs);
489
490 dev->admin_msix_vector_idx = EFA_MGMNT_MSIX_VEC_IDX;
491 num_vecs = pci_alloc_irq_vectors(dev: dev->pdev, min_vecs: 1,
492 max_vecs, PCI_IRQ_MSIX);
493
494 if (num_vecs < 0) {
495 dev_err(&dev->pdev->dev, "Failed to enable MSI-X. error %d\n",
496 num_vecs);
497 return -ENOSPC;
498 }
499
500 dev_dbg(&dev->pdev->dev, "Allocated %d MSI-X vectors\n", num_vecs);
501
502 dev->num_irq_vectors = num_vecs;
503
504 return 0;
505}
506
507static int efa_device_init(struct efa_com_dev *edev, struct pci_dev *pdev)
508{
509 int dma_width;
510 int err;
511
512 err = efa_com_dev_reset(edev, reset_reason: EFA_REGS_RESET_NORMAL);
513 if (err)
514 return err;
515
516 err = efa_com_validate_version(edev);
517 if (err)
518 return err;
519
520 dma_width = efa_com_get_dma_width(edev);
521 if (dma_width < 0) {
522 err = dma_width;
523 return err;
524 }
525
526 err = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(dma_width));
527 if (err) {
528 dev_err(&pdev->dev, "dma_set_mask_and_coherent failed %d\n", err);
529 return err;
530 }
531
532 dma_set_max_seg_size(dev: &pdev->dev, UINT_MAX);
533 return 0;
534}
535
536static struct efa_dev *efa_probe_device(struct pci_dev *pdev)
537{
538 struct efa_com_dev *edev;
539 struct efa_dev *dev;
540 int pci_mem_bars;
541 int err;
542
543 err = pci_enable_device_mem(dev: pdev);
544 if (err) {
545 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
546 return ERR_PTR(error: err);
547 }
548
549 pci_set_master(dev: pdev);
550
551 dev = ib_alloc_device(efa_dev, ibdev);
552 if (!dev) {
553 dev_err(&pdev->dev, "Device alloc failed\n");
554 err = -ENOMEM;
555 goto err_disable_device;
556 }
557
558 pci_set_drvdata(pdev, data: dev);
559 edev = &dev->edev;
560 edev->efa_dev = dev;
561 edev->dmadev = &pdev->dev;
562 dev->pdev = pdev;
563 xa_init(xa: &dev->cqs_xa);
564
565 pci_mem_bars = pci_select_bars(dev: pdev, IORESOURCE_MEM);
566 if (EFA_BASE_BAR_MASK & ~pci_mem_bars) {
567 dev_err(&pdev->dev, "BARs unavailable. Requested %#x, available %#x\n",
568 (int)EFA_BASE_BAR_MASK, pci_mem_bars);
569 err = -ENODEV;
570 goto err_ibdev_destroy;
571 }
572 err = pci_request_selected_regions(pdev, EFA_BASE_BAR_MASK, DRV_MODULE_NAME);
573 if (err) {
574 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
575 err);
576 goto err_ibdev_destroy;
577 }
578
579 dev->reg_bar_addr = pci_resource_start(pdev, EFA_REG_BAR);
580 dev->reg_bar_len = pci_resource_len(pdev, EFA_REG_BAR);
581 dev->mem_bar_addr = pci_resource_start(pdev, EFA_MEM_BAR);
582 dev->mem_bar_len = pci_resource_len(pdev, EFA_MEM_BAR);
583
584 edev->reg_bar = devm_ioremap(dev: &pdev->dev,
585 offset: dev->reg_bar_addr,
586 size: dev->reg_bar_len);
587 if (!edev->reg_bar) {
588 dev_err(&pdev->dev, "Failed to remap register bar\n");
589 err = -EFAULT;
590 goto err_release_bars;
591 }
592
593 err = efa_com_mmio_reg_read_init(edev);
594 if (err) {
595 dev_err(&pdev->dev, "Failed to init readless MMIO\n");
596 goto err_iounmap;
597 }
598
599 err = efa_device_init(edev, pdev);
600 if (err) {
601 dev_err(&pdev->dev, "EFA device init failed\n");
602 if (err == -ETIME)
603 err = -EPROBE_DEFER;
604 goto err_reg_read_destroy;
605 }
606
607 err = efa_enable_msix(dev);
608 if (err)
609 goto err_reg_read_destroy;
610
611 edev->aq.msix_vector_idx = dev->admin_msix_vector_idx;
612 edev->aenq.msix_vector_idx = dev->admin_msix_vector_idx;
613
614 err = efa_set_mgmnt_irq(dev);
615 if (err)
616 goto err_disable_msix;
617
618 err = efa_com_admin_init(edev, aenq_handlers: &aenq_handlers);
619 if (err)
620 goto err_free_mgmnt_irq;
621
622 return dev;
623
624err_free_mgmnt_irq:
625 efa_free_irq(dev, irq: &dev->admin_irq);
626err_disable_msix:
627 efa_disable_msix(dev);
628err_reg_read_destroy:
629 efa_com_mmio_reg_read_destroy(edev);
630err_iounmap:
631 devm_iounmap(dev: &pdev->dev, addr: edev->reg_bar);
632err_release_bars:
633 efa_release_bars(dev, EFA_BASE_BAR_MASK);
634err_ibdev_destroy:
635 ib_dealloc_device(device: &dev->ibdev);
636err_disable_device:
637 pci_disable_device(dev: pdev);
638 return ERR_PTR(error: err);
639}
640
641static void efa_remove_device(struct pci_dev *pdev,
642 enum efa_regs_reset_reason_types reset_reason)
643{
644 struct efa_dev *dev = pci_get_drvdata(pdev);
645 struct efa_com_dev *edev;
646
647 edev = &dev->edev;
648 efa_com_dev_reset(edev, reset_reason);
649 efa_com_admin_destroy(edev);
650 efa_free_irq(dev, irq: &dev->admin_irq);
651 efa_disable_msix(dev);
652 efa_com_mmio_reg_read_destroy(edev);
653 devm_iounmap(dev: &pdev->dev, addr: edev->reg_bar);
654 efa_release_bars(dev, EFA_BASE_BAR_MASK);
655 xa_destroy(&dev->cqs_xa);
656 ib_dealloc_device(device: &dev->ibdev);
657 pci_disable_device(dev: pdev);
658}
659
660static int efa_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
661{
662 struct efa_dev *dev;
663 int err;
664
665 dev = efa_probe_device(pdev);
666 if (IS_ERR(ptr: dev))
667 return PTR_ERR(ptr: dev);
668
669 err = efa_ib_device_add(dev);
670 if (err)
671 goto err_remove_device;
672
673 return 0;
674
675err_remove_device:
676 efa_remove_device(pdev, reset_reason: EFA_REGS_RESET_INIT_ERR);
677 return err;
678}
679
680static void efa_remove(struct pci_dev *pdev)
681{
682 struct efa_dev *dev = pci_get_drvdata(pdev);
683
684 efa_ib_device_remove(dev);
685 efa_remove_device(pdev, reset_reason: EFA_REGS_RESET_NORMAL);
686}
687
688static void efa_shutdown(struct pci_dev *pdev)
689{
690 struct efa_dev *dev = pci_get_drvdata(pdev);
691
692 efa_destroy_eqs(dev);
693 efa_com_dev_reset(edev: &dev->edev, reset_reason: EFA_REGS_RESET_SHUTDOWN);
694 efa_free_irq(dev, irq: &dev->admin_irq);
695 efa_disable_msix(dev);
696}
697
698static struct pci_driver efa_pci_driver = {
699 .name = DRV_MODULE_NAME,
700 .id_table = efa_pci_tbl,
701 .probe = efa_probe,
702 .remove = efa_remove,
703 .shutdown = efa_shutdown,
704};
705
706module_pci_driver(efa_pci_driver);
707

source code of linux/drivers/infiniband/hw/efa/efa_main.c