1 // SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
2 /*
3 * Copyright 2018-2026 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 #define PCI_DEV_ID_EFA4_VF 0xefa4
21
22 static const struct pci_device_id efa_pci_tbl[] = {
23 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA0_VF) },
24 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA1_VF) },
25 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA2_VF) },
26 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA3_VF) },
27 { PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA4_VF) },
28 { }
29 };
30
31 MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
32 MODULE_LICENSE("Dual BSD/GPL");
33 MODULE_DESCRIPTION(DEVICE_NAME);
34 MODULE_DEVICE_TABLE(pci, efa_pci_tbl);
35
36 #define EFA_REG_BAR 0
37 #define EFA_MEM_BAR 2
38 #define EFA_BASE_BAR_MASK (BIT(EFA_REG_BAR) | BIT(EFA_MEM_BAR))
39
40 #define EFA_AENQ_ENABLED_GROUPS \
41 (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
42 BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
43
44 extern const struct uapi_definition efa_uapi_defs[];
45
46 /* This handler will called for unknown event group or unimplemented handlers */
unimplemented_aenq_handler(void * data,struct efa_admin_aenq_entry * aenq_e)47 static void unimplemented_aenq_handler(void *data,
48 struct efa_admin_aenq_entry *aenq_e)
49 {
50 struct efa_dev *dev = (struct efa_dev *)data;
51
52 ibdev_err(&dev->ibdev,
53 "Unknown event was received or event with unimplemented handler\n");
54 }
55
efa_keep_alive(void * data,struct efa_admin_aenq_entry * aenq_e)56 static void efa_keep_alive(void *data, struct efa_admin_aenq_entry *aenq_e)
57 {
58 struct efa_dev *dev = (struct efa_dev *)data;
59
60 atomic64_inc(&dev->stats.keep_alive_rcvd);
61 }
62
63 static struct efa_aenq_handlers aenq_handlers = {
64 .handlers = {
65 [EFA_ADMIN_KEEP_ALIVE] = efa_keep_alive,
66 },
67 .unimplemented_handler = unimplemented_aenq_handler
68 };
69
efa_release_bars(struct efa_dev * dev,int bars_mask)70 static void efa_release_bars(struct efa_dev *dev, int bars_mask)
71 {
72 struct pci_dev *pdev = dev->pdev;
73 int release_bars;
74
75 release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & bars_mask;
76 pci_release_selected_regions(pdev, release_bars);
77 }
78
efa_process_comp_eqe(struct efa_dev * dev,struct efa_admin_eqe * eqe)79 static void efa_process_comp_eqe(struct efa_dev *dev, struct efa_admin_eqe *eqe)
80 {
81 u16 cqn = eqe->u.comp_event.cqn;
82 struct efa_cq *cq;
83
84 /* Safe to load as we're in irq and removal calls synchronize_irq() */
85 cq = xa_load(&dev->cqs_xa, cqn);
86 if (unlikely(!cq)) {
87 ibdev_err_ratelimited(&dev->ibdev,
88 "Completion event on non-existent CQ[%u]",
89 cqn);
90 return;
91 }
92
93 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
94 }
95
efa_process_eqe(struct efa_com_eq * eeq,struct efa_admin_eqe * eqe)96 static void efa_process_eqe(struct efa_com_eq *eeq, struct efa_admin_eqe *eqe)
97 {
98 struct efa_dev *dev = container_of(eeq->edev, struct efa_dev, edev);
99
100 if (likely(EFA_GET(&eqe->common, EFA_ADMIN_EQE_EVENT_TYPE) ==
101 EFA_ADMIN_EQE_EVENT_TYPE_COMPLETION))
102 efa_process_comp_eqe(dev, eqe);
103 else
104 ibdev_err_ratelimited(&dev->ibdev,
105 "Unknown event type received %lu",
106 EFA_GET(&eqe->common,
107 EFA_ADMIN_EQE_EVENT_TYPE));
108 }
109
efa_intr_msix_comp(int irq,void * data)110 static irqreturn_t efa_intr_msix_comp(int irq, void *data)
111 {
112 struct efa_eq *eq = data;
113 struct efa_com_dev *edev = eq->eeq.edev;
114
115 efa_com_eq_comp_intr_handler(edev, &eq->eeq);
116
117 return IRQ_HANDLED;
118 }
119
efa_intr_msix_mgmnt(int irq,void * data)120 static irqreturn_t efa_intr_msix_mgmnt(int irq, void *data)
121 {
122 struct efa_dev *dev = data;
123
124 efa_com_admin_q_comp_intr_handler(&dev->edev);
125 efa_com_aenq_intr_handler(&dev->edev, data);
126
127 return IRQ_HANDLED;
128 }
129
efa_request_irq(struct efa_dev * dev,struct efa_irq * irq)130 static int efa_request_irq(struct efa_dev *dev, struct efa_irq *irq)
131 {
132 int err;
133
134 err = request_irq(irq->irqn, irq->handler, 0, irq->name, irq->data);
135 if (err) {
136 dev_err(&dev->pdev->dev, "Failed to request irq %s (%d)\n",
137 irq->name, err);
138 return err;
139 }
140
141 irq_set_affinity_hint(irq->irqn, &irq->affinity_hint_mask);
142
143 return 0;
144 }
145
efa_setup_comp_irq(struct efa_dev * dev,struct efa_eq * eq,u32 vector)146 static void efa_setup_comp_irq(struct efa_dev *dev, struct efa_eq *eq, u32 vector)
147 {
148 u32 cpu;
149
150 cpu = vector - EFA_COMP_EQS_VEC_BASE;
151 snprintf(eq->irq.name, EFA_IRQNAME_SIZE, "efa-comp%d@pci:%s", cpu,
152 pci_name(dev->pdev));
153 eq->irq.handler = efa_intr_msix_comp;
154 eq->irq.data = eq;
155 eq->irq.vector = vector;
156 eq->irq.irqn = pci_irq_vector(dev->pdev, vector);
157 cpumask_set_cpu(cpu, &eq->irq.affinity_hint_mask);
158 }
159
efa_free_irq(struct efa_dev * dev,struct efa_irq * irq)160 static void efa_free_irq(struct efa_dev *dev, struct efa_irq *irq)
161 {
162 irq_set_affinity_hint(irq->irqn, NULL);
163 free_irq(irq->irqn, irq->data);
164 }
165
efa_setup_mgmnt_irq(struct efa_dev * dev)166 static void efa_setup_mgmnt_irq(struct efa_dev *dev)
167 {
168 u32 cpu;
169
170 snprintf(dev->admin_irq.name, EFA_IRQNAME_SIZE,
171 "efa-mgmnt@pci:%s", pci_name(dev->pdev));
172 dev->admin_irq.handler = efa_intr_msix_mgmnt;
173 dev->admin_irq.data = dev;
174 dev->admin_irq.vector = dev->admin_msix_vector_idx;
175 dev->admin_irq.irqn = pci_irq_vector(dev->pdev,
176 dev->admin_msix_vector_idx);
177 cpu = cpumask_first(cpu_online_mask);
178 cpumask_set_cpu(cpu,
179 &dev->admin_irq.affinity_hint_mask);
180 dev_info(&dev->pdev->dev, "Setup irq:%d name:%s\n",
181 dev->admin_irq.irqn,
182 dev->admin_irq.name);
183 }
184
efa_set_mgmnt_irq(struct efa_dev * dev)185 static int efa_set_mgmnt_irq(struct efa_dev *dev)
186 {
187 efa_setup_mgmnt_irq(dev);
188
189 return efa_request_irq(dev, &dev->admin_irq);
190 }
191
efa_request_doorbell_bar(struct efa_dev * dev)192 static int efa_request_doorbell_bar(struct efa_dev *dev)
193 {
194 u8 db_bar_idx = dev->dev_attr.db_bar;
195 struct pci_dev *pdev = dev->pdev;
196 int pci_mem_bars;
197 int db_bar;
198 int err;
199
200 db_bar = BIT(db_bar_idx);
201 if (!(db_bar & EFA_BASE_BAR_MASK)) {
202 pci_mem_bars = pci_select_bars(pdev, IORESOURCE_MEM);
203 if (db_bar & ~pci_mem_bars) {
204 dev_err(&pdev->dev,
205 "Doorbells BAR unavailable. Requested %#x, available %#x\n",
206 db_bar, pci_mem_bars);
207 return -ENODEV;
208 }
209
210 err = pci_request_selected_regions(pdev, db_bar, DRV_MODULE_NAME);
211 if (err) {
212 dev_err(&pdev->dev,
213 "pci_request_selected_regions for bar %d failed %d\n",
214 db_bar_idx, err);
215 return err;
216 }
217 }
218
219 dev->db_bar_addr = pci_resource_start(dev->pdev, db_bar_idx);
220 dev->db_bar_len = pci_resource_len(dev->pdev, db_bar_idx);
221
222 return 0;
223 }
224
efa_release_doorbell_bar(struct efa_dev * dev)225 static void efa_release_doorbell_bar(struct efa_dev *dev)
226 {
227 if (!(BIT(dev->dev_attr.db_bar) & EFA_BASE_BAR_MASK))
228 efa_release_bars(dev, BIT(dev->dev_attr.db_bar));
229 }
230
efa_update_hw_hints(struct efa_dev * dev,struct efa_com_get_hw_hints_result * hw_hints)231 static void efa_update_hw_hints(struct efa_dev *dev,
232 struct efa_com_get_hw_hints_result *hw_hints)
233 {
234 struct efa_com_dev *edev = &dev->edev;
235
236 if (hw_hints->mmio_read_timeout)
237 edev->mmio_read.mmio_read_timeout =
238 hw_hints->mmio_read_timeout * 1000;
239
240 if (hw_hints->poll_interval)
241 edev->aq.poll_interval = hw_hints->poll_interval;
242
243 if (hw_hints->admin_completion_timeout)
244 edev->aq.completion_timeout =
245 hw_hints->admin_completion_timeout;
246 }
247
efa_stats_init(struct efa_dev * dev)248 static void efa_stats_init(struct efa_dev *dev)
249 {
250 atomic64_t *s = (atomic64_t *)&dev->stats;
251 int i;
252
253 for (i = 0; i < sizeof(dev->stats) / sizeof(*s); i++, s++)
254 atomic64_set(s, 0);
255 }
256
efa_set_host_info(struct efa_dev * dev)257 static void efa_set_host_info(struct efa_dev *dev)
258 {
259 struct efa_admin_set_feature_resp resp = {};
260 struct efa_admin_set_feature_cmd cmd = {};
261 struct efa_admin_host_info *hinf;
262 u32 bufsz = sizeof(*hinf);
263 dma_addr_t hinf_dma;
264
265 if (!efa_com_check_supported_feature_id(&dev->edev,
266 EFA_ADMIN_HOST_INFO))
267 return;
268
269 /* Failures in host info set shall not disturb probe */
270 hinf = dma_alloc_coherent(&dev->pdev->dev, bufsz, &hinf_dma,
271 GFP_KERNEL);
272 if (!hinf)
273 return;
274
275 strscpy(hinf->os_dist_str, utsname()->release,
276 sizeof(hinf->os_dist_str));
277 hinf->os_type = EFA_ADMIN_OS_LINUX;
278 strscpy(hinf->kernel_ver_str, utsname()->version,
279 sizeof(hinf->kernel_ver_str));
280 hinf->kernel_ver = LINUX_VERSION_CODE;
281 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MAJOR, 0);
282 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MINOR, 0);
283 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_SUB_MINOR, 0);
284 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MODULE_TYPE, 0);
285 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_BUS, dev->pdev->bus->number);
286 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_DEVICE,
287 PCI_SLOT(dev->pdev->devfn));
288 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_FUNCTION,
289 PCI_FUNC(dev->pdev->devfn));
290 EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MAJOR,
291 EFA_COMMON_SPEC_VERSION_MAJOR);
292 EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MINOR,
293 EFA_COMMON_SPEC_VERSION_MINOR);
294 EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_INTREE, 1);
295 EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_GDR, 0);
296
297 efa_com_set_feature_ex(&dev->edev, &resp, &cmd, EFA_ADMIN_HOST_INFO,
298 hinf_dma, bufsz);
299
300 dma_free_coherent(&dev->pdev->dev, bufsz, hinf, hinf_dma);
301 }
302
efa_destroy_eq(struct efa_dev * dev,struct efa_eq * eq)303 static void efa_destroy_eq(struct efa_dev *dev, struct efa_eq *eq)
304 {
305 efa_free_irq(dev, &eq->irq);
306 efa_com_eq_destroy(&dev->edev, &eq->eeq);
307 }
308
efa_create_eq(struct efa_dev * dev,struct efa_eq * eq,u32 msix_vec)309 static int efa_create_eq(struct efa_dev *dev, struct efa_eq *eq, u32 msix_vec)
310 {
311 int err;
312
313 err = efa_com_eq_init(&dev->edev, &eq->eeq, efa_process_eqe,
314 dev->dev_attr.max_eq_depth, msix_vec);
315 if (err)
316 return err;
317
318 efa_setup_comp_irq(dev, eq, msix_vec);
319 err = efa_request_irq(dev, &eq->irq);
320 if (err)
321 goto err_destroy_eq;
322
323 efa_com_arm_eq(&dev->edev, &eq->eeq);
324
325 return 0;
326
327 err_destroy_eq:
328 efa_com_eq_destroy(&dev->edev, &eq->eeq);
329 return err;
330 }
331
efa_create_eqs(struct efa_dev * dev)332 static int efa_create_eqs(struct efa_dev *dev)
333 {
334 u32 neqs = dev->dev_attr.max_eq;
335 int err, i;
336
337 neqs = min_t(u32, neqs, dev->num_irq_vectors - EFA_COMP_EQS_VEC_BASE);
338 dev->neqs = neqs;
339 dev->eqs = kzalloc_objs(*dev->eqs, neqs);
340 if (!dev->eqs)
341 return -ENOMEM;
342
343 for (i = 0; i < neqs; i++) {
344 err = efa_create_eq(dev, &dev->eqs[i], i + EFA_COMP_EQS_VEC_BASE);
345 if (err)
346 goto err_destroy_eqs;
347 }
348
349 return 0;
350
351 err_destroy_eqs:
352 for (i--; i >= 0; i--)
353 efa_destroy_eq(dev, &dev->eqs[i]);
354 kfree(dev->eqs);
355
356 return err;
357 }
358
efa_destroy_eqs(struct efa_dev * dev)359 static void efa_destroy_eqs(struct efa_dev *dev)
360 {
361 int i;
362
363 for (i = 0; i < dev->neqs; i++)
364 efa_destroy_eq(dev, &dev->eqs[i]);
365
366 kfree(dev->eqs);
367 }
368
369 static const struct ib_device_ops efa_dev_ops = {
370 .owner = THIS_MODULE,
371 .driver_id = RDMA_DRIVER_EFA,
372 .uverbs_abi_ver = EFA_UVERBS_ABI_VERSION,
373
374 .alloc_hw_port_stats = efa_alloc_hw_port_stats,
375 .alloc_hw_device_stats = efa_alloc_hw_device_stats,
376 .alloc_pd = efa_alloc_pd,
377 .alloc_ucontext = efa_alloc_ucontext,
378 .create_user_cq = efa_create_user_cq,
379 .create_comp_cntr = efa_create_comp_cntr,
380 .create_qp = efa_create_qp,
381 .create_user_ah = efa_create_ah,
382 .dealloc_pd = efa_dealloc_pd,
383 .dealloc_ucontext = efa_dealloc_ucontext,
384 .dereg_mr = efa_dereg_mr,
385 .destroy_ah = efa_destroy_ah,
386 .destroy_comp_cntr = efa_destroy_comp_cntr,
387 .destroy_cq = efa_destroy_cq,
388 .destroy_qp = efa_destroy_qp,
389 .get_hw_stats = efa_get_hw_stats,
390 .get_link_layer = efa_port_link_layer,
391 .get_port_immutable = efa_get_port_immutable,
392 .modify_comp_cntr = efa_modify_comp_cntr,
393 .mmap = efa_mmap,
394 .mmap_free = efa_mmap_free,
395 .modify_qp = efa_modify_qp,
396 .qp_attach_comp_cntr = efa_qp_attach_comp_cntr,
397 .query_comp_cntr_caps = efa_query_comp_cntr_caps,
398 .query_device = efa_query_device,
399 .query_gid = efa_query_gid,
400 .query_pkey = efa_query_pkey,
401 .query_port = efa_query_port,
402 .query_port_speed = efa_query_port_speed,
403 .query_qp = efa_query_qp,
404 .reg_user_mr = efa_reg_mr,
405 .reg_user_mr_dmabuf = efa_reg_user_mr_dmabuf,
406
407 INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah),
408 INIT_RDMA_OBJ_SIZE(ib_cq, efa_cq, ibcq),
409 INIT_RDMA_OBJ_SIZE(ib_comp_cntr, efa_comp_cntr, ibcc),
410 INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd),
411 INIT_RDMA_OBJ_SIZE(ib_qp, efa_qp, ibqp),
412 INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext),
413 };
414
efa_ib_device_add(struct efa_dev * dev)415 static int efa_ib_device_add(struct efa_dev *dev)
416 {
417 struct efa_com_get_hw_hints_result hw_hints;
418 struct pci_dev *pdev = dev->pdev;
419 int err;
420
421 efa_stats_init(dev);
422
423 err = efa_com_get_device_attr(&dev->edev, &dev->dev_attr);
424 if (err)
425 return err;
426
427 dev_dbg(&dev->pdev->dev, "Doorbells bar (%d)\n", dev->dev_attr.db_bar);
428 err = efa_request_doorbell_bar(dev);
429 if (err)
430 return err;
431
432 err = efa_com_get_hw_hints(&dev->edev, &hw_hints);
433 if (err)
434 goto err_release_doorbell_bar;
435
436 efa_update_hw_hints(dev, &hw_hints);
437
438 /* Try to enable all the available aenq groups */
439 err = efa_com_set_aenq_config(&dev->edev, EFA_AENQ_ENABLED_GROUPS);
440 if (err)
441 goto err_release_doorbell_bar;
442
443 err = efa_create_eqs(dev);
444 if (err)
445 goto err_release_doorbell_bar;
446
447 efa_set_host_info(dev);
448
449 dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED;
450 dev->ibdev.node_guid = dev->dev_attr.guid;
451 dev->ibdev.phys_port_cnt = 1;
452 dev->ibdev.num_comp_vectors = dev->neqs ?: 1;
453 dev->ibdev.dev.parent = &pdev->dev;
454
455 ib_set_device_ops(&dev->ibdev, &efa_dev_ops);
456
457 dev->ibdev.driver_def = efa_uapi_defs;
458
459 err = ib_register_device(&dev->ibdev, "efa_%d", &pdev->dev);
460 if (err)
461 goto err_destroy_eqs;
462
463 ibdev_info(&dev->ibdev, "IB device registered\n");
464
465 return 0;
466
467 err_destroy_eqs:
468 efa_destroy_eqs(dev);
469 err_release_doorbell_bar:
470 efa_release_doorbell_bar(dev);
471 return err;
472 }
473
efa_ib_device_remove(struct efa_dev * dev)474 static void efa_ib_device_remove(struct efa_dev *dev)
475 {
476 ibdev_info(&dev->ibdev, "Unregister ib device\n");
477 ib_unregister_device(&dev->ibdev);
478 efa_destroy_eqs(dev);
479 efa_release_doorbell_bar(dev);
480 }
481
efa_disable_msix(struct efa_dev * dev)482 static void efa_disable_msix(struct efa_dev *dev)
483 {
484 pci_free_irq_vectors(dev->pdev);
485 }
486
efa_enable_msix(struct efa_dev * dev)487 static int efa_enable_msix(struct efa_dev *dev)
488 {
489 int max_vecs, num_vecs;
490
491 /*
492 * Reserve the max msix vectors we might need, one vector is reserved
493 * for admin.
494 */
495 max_vecs = min_t(int, pci_msix_vec_count(dev->pdev),
496 num_online_cpus() + 1);
497 dev_dbg(&dev->pdev->dev, "Trying to enable MSI-X, vectors %d\n",
498 max_vecs);
499
500 dev->admin_msix_vector_idx = EFA_MGMNT_MSIX_VEC_IDX;
501 num_vecs = pci_alloc_irq_vectors(dev->pdev, 1,
502 max_vecs, PCI_IRQ_MSIX);
503
504 if (num_vecs < 0) {
505 dev_err(&dev->pdev->dev, "Failed to enable MSI-X. error %d\n",
506 num_vecs);
507 return -ENOSPC;
508 }
509
510 dev_dbg(&dev->pdev->dev, "Allocated %d MSI-X vectors\n", num_vecs);
511
512 dev->num_irq_vectors = num_vecs;
513
514 return 0;
515 }
516
efa_device_init(struct efa_com_dev * edev,struct pci_dev * pdev)517 static int efa_device_init(struct efa_com_dev *edev, struct pci_dev *pdev)
518 {
519 int dma_width;
520 int err;
521
522 err = efa_com_dev_reset(edev, EFA_REGS_RESET_NORMAL);
523 if (err)
524 return err;
525
526 err = efa_com_validate_version(edev);
527 if (err)
528 return err;
529
530 dma_width = efa_com_get_dma_width(edev);
531 if (dma_width < 0) {
532 err = dma_width;
533 return err;
534 }
535
536 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_width));
537 if (err) {
538 dev_err(&pdev->dev, "dma_set_mask_and_coherent failed %d\n", err);
539 return err;
540 }
541
542 dma_set_max_seg_size(&pdev->dev, UINT_MAX);
543 return 0;
544 }
545
efa_probe_device(struct pci_dev * pdev)546 static struct efa_dev *efa_probe_device(struct pci_dev *pdev)
547 {
548 struct efa_com_dev *edev;
549 struct efa_dev *dev;
550 int pci_mem_bars;
551 int err;
552
553 err = pci_enable_device_mem(pdev);
554 if (err) {
555 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
556 return ERR_PTR(err);
557 }
558
559 pci_set_master(pdev);
560
561 dev = ib_alloc_device(efa_dev, ibdev);
562 if (!dev) {
563 dev_err(&pdev->dev, "Device alloc failed\n");
564 err = -ENOMEM;
565 goto err_disable_device;
566 }
567
568 pci_set_drvdata(pdev, dev);
569 edev = &dev->edev;
570 edev->efa_dev = dev;
571 edev->dmadev = &pdev->dev;
572 dev->pdev = pdev;
573 xa_init(&dev->cqs_xa);
574
575 pci_mem_bars = pci_select_bars(pdev, IORESOURCE_MEM);
576 if (EFA_BASE_BAR_MASK & ~pci_mem_bars) {
577 dev_err(&pdev->dev, "BARs unavailable. Requested %#x, available %#x\n",
578 (int)EFA_BASE_BAR_MASK, pci_mem_bars);
579 err = -ENODEV;
580 goto err_ibdev_destroy;
581 }
582 err = pci_request_selected_regions(pdev, EFA_BASE_BAR_MASK, DRV_MODULE_NAME);
583 if (err) {
584 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
585 err);
586 goto err_ibdev_destroy;
587 }
588
589 dev->reg_bar_addr = pci_resource_start(pdev, EFA_REG_BAR);
590 dev->reg_bar_len = pci_resource_len(pdev, EFA_REG_BAR);
591 dev->mem_bar_addr = pci_resource_start(pdev, EFA_MEM_BAR);
592 dev->mem_bar_len = pci_resource_len(pdev, EFA_MEM_BAR);
593
594 edev->reg_bar = devm_ioremap(&pdev->dev,
595 dev->reg_bar_addr,
596 dev->reg_bar_len);
597 if (!edev->reg_bar) {
598 dev_err(&pdev->dev, "Failed to remap register bar\n");
599 err = -EFAULT;
600 goto err_release_bars;
601 }
602
603 err = efa_com_mmio_reg_read_init(edev);
604 if (err) {
605 dev_err(&pdev->dev, "Failed to init readless MMIO\n");
606 goto err_iounmap;
607 }
608
609 err = efa_device_init(edev, pdev);
610 if (err) {
611 dev_err(&pdev->dev, "EFA device init failed\n");
612 if (err == -ETIME)
613 err = -EPROBE_DEFER;
614 goto err_reg_read_destroy;
615 }
616
617 err = efa_enable_msix(dev);
618 if (err)
619 goto err_reg_read_destroy;
620
621 edev->aq.msix_vector_idx = dev->admin_msix_vector_idx;
622 edev->aenq.msix_vector_idx = dev->admin_msix_vector_idx;
623
624 err = efa_com_admin_init(edev, &aenq_handlers);
625 if (err)
626 goto err_disable_msix;
627
628 err = efa_set_mgmnt_irq(dev);
629 if (err)
630 goto err_destroy_admin;
631
632 efa_com_set_admin_polling_mode(edev, false);
633
634 return dev;
635
636 err_destroy_admin:
637 efa_com_dev_reset(edev, EFA_REGS_RESET_INIT_ERR);
638 efa_com_admin_destroy(edev);
639 err_disable_msix:
640 efa_disable_msix(dev);
641 err_reg_read_destroy:
642 efa_com_mmio_reg_read_destroy(edev);
643 err_iounmap:
644 devm_iounmap(&pdev->dev, edev->reg_bar);
645 err_release_bars:
646 efa_release_bars(dev, EFA_BASE_BAR_MASK);
647 err_ibdev_destroy:
648 ib_dealloc_device(&dev->ibdev);
649 err_disable_device:
650 pci_disable_device(pdev);
651 return ERR_PTR(err);
652 }
653
efa_remove_device(struct pci_dev * pdev,enum efa_regs_reset_reason_types reset_reason)654 static void efa_remove_device(struct pci_dev *pdev,
655 enum efa_regs_reset_reason_types reset_reason)
656 {
657 struct efa_dev *dev = pci_get_drvdata(pdev);
658 struct efa_com_dev *edev;
659
660 edev = &dev->edev;
661 efa_com_dev_reset(edev, reset_reason);
662 efa_free_irq(dev, &dev->admin_irq);
663 efa_com_admin_destroy(edev);
664 efa_disable_msix(dev);
665 efa_com_mmio_reg_read_destroy(edev);
666 devm_iounmap(&pdev->dev, edev->reg_bar);
667 efa_release_bars(dev, EFA_BASE_BAR_MASK);
668 xa_destroy(&dev->cqs_xa);
669 ib_dealloc_device(&dev->ibdev);
670 pci_disable_device(pdev);
671 }
672
efa_probe(struct pci_dev * pdev,const struct pci_device_id * ent)673 static int efa_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
674 {
675 struct efa_dev *dev;
676 int err;
677
678 dev = efa_probe_device(pdev);
679 if (IS_ERR(dev))
680 return PTR_ERR(dev);
681
682 err = efa_ib_device_add(dev);
683 if (err)
684 goto err_remove_device;
685
686 return 0;
687
688 err_remove_device:
689 efa_remove_device(pdev, EFA_REGS_RESET_INIT_ERR);
690 return err;
691 }
692
efa_remove(struct pci_dev * pdev)693 static void efa_remove(struct pci_dev *pdev)
694 {
695 struct efa_dev *dev = pci_get_drvdata(pdev);
696
697 efa_ib_device_remove(dev);
698 efa_remove_device(pdev, EFA_REGS_RESET_NORMAL);
699 }
700
efa_shutdown(struct pci_dev * pdev)701 static void efa_shutdown(struct pci_dev *pdev)
702 {
703 struct efa_dev *dev = pci_get_drvdata(pdev);
704
705 efa_destroy_eqs(dev);
706 efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_SHUTDOWN);
707 efa_free_irq(dev, &dev->admin_irq);
708 efa_disable_msix(dev);
709 }
710
711 static struct pci_driver efa_pci_driver = {
712 .name = DRV_MODULE_NAME,
713 .id_table = efa_pci_tbl,
714 .probe = efa_probe,
715 .remove = efa_remove,
716 .shutdown = efa_shutdown,
717 };
718
719 module_pci_driver(efa_pci_driver);
720