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
21 static 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
29 MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
30 MODULE_LICENSE("Dual BSD/GPL");
31 MODULE_DESCRIPTION(DEVICE_NAME);
32 MODULE_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
42 extern const struct uapi_definition efa_uapi_defs[];
43
44 /* This handler will called for unknown event group or unimplemented handlers */
unimplemented_aenq_handler(void * data,struct efa_admin_aenq_entry * aenq_e)45 static 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(&dev->ibdev,
51 "Unknown event was received or event with unimplemented handler\n");
52 }
53
efa_keep_alive(void * data,struct efa_admin_aenq_entry * aenq_e)54 static 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(&dev->stats.keep_alive_rcvd);
59 }
60
61 static 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
efa_release_bars(struct efa_dev * dev,int bars_mask)68 static 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(pdev, IORESOURCE_MEM) & bars_mask;
74 pci_release_selected_regions(pdev, release_bars);
75 }
76
efa_process_comp_eqe(struct efa_dev * dev,struct efa_admin_eqe * eqe)77 static 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, 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
efa_process_eqe(struct efa_com_eq * eeq,struct efa_admin_eqe * eqe)94 static 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
efa_intr_msix_comp(int irq,void * data)108 static 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, &eq->eeq);
114
115 return IRQ_HANDLED;
116 }
117
efa_intr_msix_mgmnt(int irq,void * data)118 static 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(&dev->edev);
123 efa_com_aenq_intr_handler(&dev->edev, data);
124
125 return IRQ_HANDLED;
126 }
127
efa_request_irq(struct efa_dev * dev,struct efa_irq * irq)128 static int efa_request_irq(struct efa_dev *dev, struct efa_irq *irq)
129 {
130 int err;
131
132 err = request_irq(irq->irqn, irq->handler, 0, irq->name, 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->irqn, &irq->affinity_hint_mask);
140
141 return 0;
142 }
143
efa_setup_comp_irq(struct efa_dev * dev,struct efa_eq * eq,u32 vector)144 static 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(eq->irq.name, EFA_IRQNAME_SIZE, "efa-comp%d@pci:%s", cpu,
150 pci_name(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->pdev, vector);
155 cpumask_set_cpu(cpu, &eq->irq.affinity_hint_mask);
156 }
157
efa_free_irq(struct efa_dev * dev,struct efa_irq * irq)158 static void efa_free_irq(struct efa_dev *dev, struct efa_irq *irq)
159 {
160 irq_set_affinity_hint(irq->irqn, NULL);
161 free_irq(irq->irqn, irq->data);
162 }
163
efa_setup_mgmnt_irq(struct efa_dev * dev)164 static void efa_setup_mgmnt_irq(struct efa_dev *dev)
165 {
166 u32 cpu;
167
168 snprintf(dev->admin_irq.name, EFA_IRQNAME_SIZE,
169 "efa-mgmnt@pci:%s", pci_name(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->pdev,
174 dev->admin_msix_vector_idx);
175 cpu = cpumask_first(cpu_online_mask);
176 cpumask_set_cpu(cpu,
177 &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
efa_set_mgmnt_irq(struct efa_dev * dev)183 static int efa_set_mgmnt_irq(struct efa_dev *dev)
184 {
185 efa_setup_mgmnt_irq(dev);
186
187 return efa_request_irq(dev, &dev->admin_irq);
188 }
189
efa_request_doorbell_bar(struct efa_dev * dev)190 static 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(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
efa_release_doorbell_bar(struct efa_dev * dev)223 static 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
efa_update_hw_hints(struct efa_dev * dev,struct efa_com_get_hw_hints_result * hw_hints)229 static 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
efa_stats_init(struct efa_dev * dev)246 static 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(s, 0);
253 }
254
efa_set_host_info(struct efa_dev * dev)255 static 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(&dev->edev,
264 EFA_ADMIN_HOST_INFO))
265 return;
266
267 /* Failures in host info set shall not disturb probe */
268 hinf = dma_alloc_coherent(&dev->pdev->dev, bufsz, &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(&dev->edev, &resp, &cmd, EFA_ADMIN_HOST_INFO,
296 hinf_dma, bufsz);
297
298 dma_free_coherent(&dev->pdev->dev, bufsz, hinf, hinf_dma);
299 }
300
efa_destroy_eq(struct efa_dev * dev,struct efa_eq * eq)301 static void efa_destroy_eq(struct efa_dev *dev, struct efa_eq *eq)
302 {
303 efa_com_eq_destroy(&dev->edev, &eq->eeq);
304 efa_free_irq(dev, &eq->irq);
305 }
306
efa_create_eq(struct efa_dev * dev,struct efa_eq * eq,u32 msix_vec)307 static 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, msix_vec);
312 err = efa_request_irq(dev, &eq->irq);
313 if (err)
314 return err;
315
316 err = efa_com_eq_init(&dev->edev, &eq->eeq, efa_process_eqe,
317 dev->dev_attr.max_eq_depth, msix_vec);
318 if (err)
319 goto err_free_comp_irq;
320
321 return 0;
322
323 err_free_comp_irq:
324 efa_free_irq(dev, &eq->irq);
325 return err;
326 }
327
efa_create_eqs(struct efa_dev * dev)328 static 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, &dev->eqs[i], i + EFA_COMP_EQS_VEC_BASE);
341 if (err)
342 goto err_destroy_eqs;
343 }
344
345 return 0;
346
347 err_destroy_eqs:
348 for (i--; i >= 0; i--)
349 efa_destroy_eq(dev, &dev->eqs[i]);
350 kfree(dev->eqs);
351
352 return err;
353 }
354
efa_destroy_eqs(struct efa_dev * dev)355 static 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, &dev->eqs[i]);
361
362 kfree(dev->eqs);
363 }
364
365 static 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_qp = efa_create_qp,
376 .create_user_ah = efa_create_ah,
377 .dealloc_pd = efa_dealloc_pd,
378 .dealloc_ucontext = efa_dealloc_ucontext,
379 .dereg_mr = efa_dereg_mr,
380 .destroy_ah = efa_destroy_ah,
381 .destroy_cq = efa_destroy_cq,
382 .destroy_qp = efa_destroy_qp,
383 .get_hw_stats = efa_get_hw_stats,
384 .get_link_layer = efa_port_link_layer,
385 .get_port_immutable = efa_get_port_immutable,
386 .mmap = efa_mmap,
387 .mmap_free = efa_mmap_free,
388 .modify_qp = efa_modify_qp,
389 .query_device = efa_query_device,
390 .query_gid = efa_query_gid,
391 .query_pkey = efa_query_pkey,
392 .query_port = efa_query_port,
393 .query_qp = efa_query_qp,
394 .reg_user_mr = efa_reg_mr,
395 .reg_user_mr_dmabuf = efa_reg_user_mr_dmabuf,
396
397 INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah),
398 INIT_RDMA_OBJ_SIZE(ib_cq, efa_cq, ibcq),
399 INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd),
400 INIT_RDMA_OBJ_SIZE(ib_qp, efa_qp, ibqp),
401 INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext),
402 };
403
efa_ib_device_add(struct efa_dev * dev)404 static int efa_ib_device_add(struct efa_dev *dev)
405 {
406 struct efa_com_get_hw_hints_result hw_hints;
407 struct pci_dev *pdev = dev->pdev;
408 int err;
409
410 efa_stats_init(dev);
411
412 err = efa_com_get_device_attr(&dev->edev, &dev->dev_attr);
413 if (err)
414 return err;
415
416 dev_dbg(&dev->pdev->dev, "Doorbells bar (%d)\n", dev->dev_attr.db_bar);
417 err = efa_request_doorbell_bar(dev);
418 if (err)
419 return err;
420
421 err = efa_com_get_hw_hints(&dev->edev, &hw_hints);
422 if (err)
423 goto err_release_doorbell_bar;
424
425 efa_update_hw_hints(dev, &hw_hints);
426
427 /* Try to enable all the available aenq groups */
428 err = efa_com_set_aenq_config(&dev->edev, EFA_AENQ_ENABLED_GROUPS);
429 if (err)
430 goto err_release_doorbell_bar;
431
432 err = efa_create_eqs(dev);
433 if (err)
434 goto err_release_doorbell_bar;
435
436 efa_set_host_info(dev);
437
438 dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED;
439 dev->ibdev.node_guid = dev->dev_attr.guid;
440 dev->ibdev.phys_port_cnt = 1;
441 dev->ibdev.num_comp_vectors = dev->neqs ?: 1;
442 dev->ibdev.dev.parent = &pdev->dev;
443
444 ib_set_device_ops(&dev->ibdev, &efa_dev_ops);
445
446 dev->ibdev.driver_def = efa_uapi_defs;
447
448 err = ib_register_device(&dev->ibdev, "efa_%d", &pdev->dev);
449 if (err)
450 goto err_destroy_eqs;
451
452 ibdev_info(&dev->ibdev, "IB device registered\n");
453
454 return 0;
455
456 err_destroy_eqs:
457 efa_destroy_eqs(dev);
458 err_release_doorbell_bar:
459 efa_release_doorbell_bar(dev);
460 return err;
461 }
462
efa_ib_device_remove(struct efa_dev * dev)463 static void efa_ib_device_remove(struct efa_dev *dev)
464 {
465 ibdev_info(&dev->ibdev, "Unregister ib device\n");
466 ib_unregister_device(&dev->ibdev);
467 efa_destroy_eqs(dev);
468 efa_release_doorbell_bar(dev);
469 }
470
efa_disable_msix(struct efa_dev * dev)471 static void efa_disable_msix(struct efa_dev *dev)
472 {
473 pci_free_irq_vectors(dev->pdev);
474 }
475
efa_enable_msix(struct efa_dev * dev)476 static int efa_enable_msix(struct efa_dev *dev)
477 {
478 int max_vecs, num_vecs;
479
480 /*
481 * Reserve the max msix vectors we might need, one vector is reserved
482 * for admin.
483 */
484 max_vecs = min_t(int, pci_msix_vec_count(dev->pdev),
485 num_online_cpus() + 1);
486 dev_dbg(&dev->pdev->dev, "Trying to enable MSI-X, vectors %d\n",
487 max_vecs);
488
489 dev->admin_msix_vector_idx = EFA_MGMNT_MSIX_VEC_IDX;
490 num_vecs = pci_alloc_irq_vectors(dev->pdev, 1,
491 max_vecs, PCI_IRQ_MSIX);
492
493 if (num_vecs < 0) {
494 dev_err(&dev->pdev->dev, "Failed to enable MSI-X. error %d\n",
495 num_vecs);
496 return -ENOSPC;
497 }
498
499 dev_dbg(&dev->pdev->dev, "Allocated %d MSI-X vectors\n", num_vecs);
500
501 dev->num_irq_vectors = num_vecs;
502
503 return 0;
504 }
505
efa_device_init(struct efa_com_dev * edev,struct pci_dev * pdev)506 static int efa_device_init(struct efa_com_dev *edev, struct pci_dev *pdev)
507 {
508 int dma_width;
509 int err;
510
511 err = efa_com_dev_reset(edev, EFA_REGS_RESET_NORMAL);
512 if (err)
513 return err;
514
515 err = efa_com_validate_version(edev);
516 if (err)
517 return err;
518
519 dma_width = efa_com_get_dma_width(edev);
520 if (dma_width < 0) {
521 err = dma_width;
522 return err;
523 }
524
525 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_width));
526 if (err) {
527 dev_err(&pdev->dev, "dma_set_mask_and_coherent failed %d\n", err);
528 return err;
529 }
530
531 dma_set_max_seg_size(&pdev->dev, UINT_MAX);
532 return 0;
533 }
534
efa_probe_device(struct pci_dev * pdev)535 static struct efa_dev *efa_probe_device(struct pci_dev *pdev)
536 {
537 struct efa_com_dev *edev;
538 struct efa_dev *dev;
539 int pci_mem_bars;
540 int err;
541
542 err = pci_enable_device_mem(pdev);
543 if (err) {
544 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
545 return ERR_PTR(err);
546 }
547
548 pci_set_master(pdev);
549
550 dev = ib_alloc_device(efa_dev, ibdev);
551 if (!dev) {
552 dev_err(&pdev->dev, "Device alloc failed\n");
553 err = -ENOMEM;
554 goto err_disable_device;
555 }
556
557 pci_set_drvdata(pdev, dev);
558 edev = &dev->edev;
559 edev->efa_dev = dev;
560 edev->dmadev = &pdev->dev;
561 dev->pdev = pdev;
562 xa_init(&dev->cqs_xa);
563
564 pci_mem_bars = pci_select_bars(pdev, IORESOURCE_MEM);
565 if (EFA_BASE_BAR_MASK & ~pci_mem_bars) {
566 dev_err(&pdev->dev, "BARs unavailable. Requested %#x, available %#x\n",
567 (int)EFA_BASE_BAR_MASK, pci_mem_bars);
568 err = -ENODEV;
569 goto err_ibdev_destroy;
570 }
571 err = pci_request_selected_regions(pdev, EFA_BASE_BAR_MASK, DRV_MODULE_NAME);
572 if (err) {
573 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
574 err);
575 goto err_ibdev_destroy;
576 }
577
578 dev->reg_bar_addr = pci_resource_start(pdev, EFA_REG_BAR);
579 dev->reg_bar_len = pci_resource_len(pdev, EFA_REG_BAR);
580 dev->mem_bar_addr = pci_resource_start(pdev, EFA_MEM_BAR);
581 dev->mem_bar_len = pci_resource_len(pdev, EFA_MEM_BAR);
582
583 edev->reg_bar = devm_ioremap(&pdev->dev,
584 dev->reg_bar_addr,
585 dev->reg_bar_len);
586 if (!edev->reg_bar) {
587 dev_err(&pdev->dev, "Failed to remap register bar\n");
588 err = -EFAULT;
589 goto err_release_bars;
590 }
591
592 err = efa_com_mmio_reg_read_init(edev);
593 if (err) {
594 dev_err(&pdev->dev, "Failed to init readless MMIO\n");
595 goto err_iounmap;
596 }
597
598 err = efa_device_init(edev, pdev);
599 if (err) {
600 dev_err(&pdev->dev, "EFA device init failed\n");
601 if (err == -ETIME)
602 err = -EPROBE_DEFER;
603 goto err_reg_read_destroy;
604 }
605
606 err = efa_enable_msix(dev);
607 if (err)
608 goto err_reg_read_destroy;
609
610 edev->aq.msix_vector_idx = dev->admin_msix_vector_idx;
611 edev->aenq.msix_vector_idx = dev->admin_msix_vector_idx;
612
613 err = efa_set_mgmnt_irq(dev);
614 if (err)
615 goto err_disable_msix;
616
617 err = efa_com_admin_init(edev, &aenq_handlers);
618 if (err)
619 goto err_free_mgmnt_irq;
620
621 return dev;
622
623 err_free_mgmnt_irq:
624 efa_free_irq(dev, &dev->admin_irq);
625 err_disable_msix:
626 efa_disable_msix(dev);
627 err_reg_read_destroy:
628 efa_com_mmio_reg_read_destroy(edev);
629 err_iounmap:
630 devm_iounmap(&pdev->dev, edev->reg_bar);
631 err_release_bars:
632 efa_release_bars(dev, EFA_BASE_BAR_MASK);
633 err_ibdev_destroy:
634 ib_dealloc_device(&dev->ibdev);
635 err_disable_device:
636 pci_disable_device(pdev);
637 return ERR_PTR(err);
638 }
639
efa_remove_device(struct pci_dev * pdev,enum efa_regs_reset_reason_types reset_reason)640 static void efa_remove_device(struct pci_dev *pdev,
641 enum efa_regs_reset_reason_types reset_reason)
642 {
643 struct efa_dev *dev = pci_get_drvdata(pdev);
644 struct efa_com_dev *edev;
645
646 edev = &dev->edev;
647 efa_com_dev_reset(edev, reset_reason);
648 efa_com_admin_destroy(edev);
649 efa_free_irq(dev, &dev->admin_irq);
650 efa_disable_msix(dev);
651 efa_com_mmio_reg_read_destroy(edev);
652 devm_iounmap(&pdev->dev, edev->reg_bar);
653 efa_release_bars(dev, EFA_BASE_BAR_MASK);
654 xa_destroy(&dev->cqs_xa);
655 ib_dealloc_device(&dev->ibdev);
656 pci_disable_device(pdev);
657 }
658
efa_probe(struct pci_dev * pdev,const struct pci_device_id * ent)659 static int efa_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
660 {
661 struct efa_dev *dev;
662 int err;
663
664 dev = efa_probe_device(pdev);
665 if (IS_ERR(dev))
666 return PTR_ERR(dev);
667
668 err = efa_ib_device_add(dev);
669 if (err)
670 goto err_remove_device;
671
672 return 0;
673
674 err_remove_device:
675 efa_remove_device(pdev, EFA_REGS_RESET_INIT_ERR);
676 return err;
677 }
678
efa_remove(struct pci_dev * pdev)679 static void efa_remove(struct pci_dev *pdev)
680 {
681 struct efa_dev *dev = pci_get_drvdata(pdev);
682
683 efa_ib_device_remove(dev);
684 efa_remove_device(pdev, EFA_REGS_RESET_NORMAL);
685 }
686
efa_shutdown(struct pci_dev * pdev)687 static void efa_shutdown(struct pci_dev *pdev)
688 {
689 struct efa_dev *dev = pci_get_drvdata(pdev);
690
691 efa_destroy_eqs(dev);
692 efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_SHUTDOWN);
693 efa_free_irq(dev, &dev->admin_irq);
694 efa_disable_msix(dev);
695 }
696
697 static struct pci_driver efa_pci_driver = {
698 .name = DRV_MODULE_NAME,
699 .id_table = efa_pci_tbl,
700 .probe = efa_probe,
701 .remove = efa_remove,
702 .shutdown = efa_shutdown,
703 };
704
705 module_pci_driver(efa_pci_driver);
706