1 // SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
2 /*
3 * Copyright 2018-2024 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,int vector)144 static void efa_setup_comp_irq(struct efa_dev *dev, struct efa_eq *eq,
145 int vector)
146 {
147 u32 cpu;
148
149 cpu = vector - EFA_COMP_EQS_VEC_BASE;
150 snprintf(eq->irq.name, EFA_IRQNAME_SIZE, "efa-comp%d@pci:%s", cpu,
151 pci_name(dev->pdev));
152 eq->irq.handler = efa_intr_msix_comp;
153 eq->irq.data = eq;
154 eq->irq.vector = vector;
155 eq->irq.irqn = pci_irq_vector(dev->pdev, vector);
156 cpumask_set_cpu(cpu, &eq->irq.affinity_hint_mask);
157 }
158
efa_free_irq(struct efa_dev * dev,struct efa_irq * irq)159 static void efa_free_irq(struct efa_dev *dev, struct efa_irq *irq)
160 {
161 irq_set_affinity_hint(irq->irqn, NULL);
162 free_irq(irq->irqn, irq->data);
163 }
164
efa_setup_mgmnt_irq(struct efa_dev * dev)165 static void efa_setup_mgmnt_irq(struct efa_dev *dev)
166 {
167 u32 cpu;
168
169 snprintf(dev->admin_irq.name, EFA_IRQNAME_SIZE,
170 "efa-mgmnt@pci:%s", pci_name(dev->pdev));
171 dev->admin_irq.handler = efa_intr_msix_mgmnt;
172 dev->admin_irq.data = dev;
173 dev->admin_irq.vector = dev->admin_msix_vector_idx;
174 dev->admin_irq.irqn = pci_irq_vector(dev->pdev,
175 dev->admin_msix_vector_idx);
176 cpu = cpumask_first(cpu_online_mask);
177 cpumask_set_cpu(cpu,
178 &dev->admin_irq.affinity_hint_mask);
179 dev_info(&dev->pdev->dev, "Setup irq:%d name:%s\n",
180 dev->admin_irq.irqn,
181 dev->admin_irq.name);
182 }
183
efa_set_mgmnt_irq(struct efa_dev * dev)184 static int efa_set_mgmnt_irq(struct efa_dev *dev)
185 {
186 efa_setup_mgmnt_irq(dev);
187
188 return efa_request_irq(dev, &dev->admin_irq);
189 }
190
efa_request_doorbell_bar(struct efa_dev * dev)191 static int efa_request_doorbell_bar(struct efa_dev *dev)
192 {
193 u8 db_bar_idx = dev->dev_attr.db_bar;
194 struct pci_dev *pdev = dev->pdev;
195 int pci_mem_bars;
196 int db_bar;
197 int err;
198
199 db_bar = BIT(db_bar_idx);
200 if (!(db_bar & EFA_BASE_BAR_MASK)) {
201 pci_mem_bars = pci_select_bars(pdev, IORESOURCE_MEM);
202 if (db_bar & ~pci_mem_bars) {
203 dev_err(&pdev->dev,
204 "Doorbells BAR unavailable. Requested %#x, available %#x\n",
205 db_bar, pci_mem_bars);
206 return -ENODEV;
207 }
208
209 err = pci_request_selected_regions(pdev, db_bar, DRV_MODULE_NAME);
210 if (err) {
211 dev_err(&pdev->dev,
212 "pci_request_selected_regions for bar %d failed %d\n",
213 db_bar_idx, err);
214 return err;
215 }
216 }
217
218 dev->db_bar_addr = pci_resource_start(dev->pdev, db_bar_idx);
219 dev->db_bar_len = pci_resource_len(dev->pdev, db_bar_idx);
220
221 return 0;
222 }
223
efa_release_doorbell_bar(struct efa_dev * dev)224 static void efa_release_doorbell_bar(struct efa_dev *dev)
225 {
226 if (!(BIT(dev->dev_attr.db_bar) & EFA_BASE_BAR_MASK))
227 efa_release_bars(dev, BIT(dev->dev_attr.db_bar));
228 }
229
efa_update_hw_hints(struct efa_dev * dev,struct efa_com_get_hw_hints_result * hw_hints)230 static void efa_update_hw_hints(struct efa_dev *dev,
231 struct efa_com_get_hw_hints_result *hw_hints)
232 {
233 struct efa_com_dev *edev = &dev->edev;
234
235 if (hw_hints->mmio_read_timeout)
236 edev->mmio_read.mmio_read_timeout =
237 hw_hints->mmio_read_timeout * 1000;
238
239 if (hw_hints->poll_interval)
240 edev->aq.poll_interval = hw_hints->poll_interval;
241
242 if (hw_hints->admin_completion_timeout)
243 edev->aq.completion_timeout =
244 hw_hints->admin_completion_timeout;
245 }
246
efa_stats_init(struct efa_dev * dev)247 static void efa_stats_init(struct efa_dev *dev)
248 {
249 atomic64_t *s = (atomic64_t *)&dev->stats;
250 int i;
251
252 for (i = 0; i < sizeof(dev->stats) / sizeof(*s); i++, s++)
253 atomic64_set(s, 0);
254 }
255
efa_set_host_info(struct efa_dev * dev)256 static void efa_set_host_info(struct efa_dev *dev)
257 {
258 struct efa_admin_set_feature_resp resp = {};
259 struct efa_admin_set_feature_cmd cmd = {};
260 struct efa_admin_host_info *hinf;
261 u32 bufsz = sizeof(*hinf);
262 dma_addr_t hinf_dma;
263
264 if (!efa_com_check_supported_feature_id(&dev->edev,
265 EFA_ADMIN_HOST_INFO))
266 return;
267
268 /* Failures in host info set shall not disturb probe */
269 hinf = dma_alloc_coherent(&dev->pdev->dev, bufsz, &hinf_dma,
270 GFP_KERNEL);
271 if (!hinf)
272 return;
273
274 strscpy(hinf->os_dist_str, utsname()->release,
275 sizeof(hinf->os_dist_str));
276 hinf->os_type = EFA_ADMIN_OS_LINUX;
277 strscpy(hinf->kernel_ver_str, utsname()->version,
278 sizeof(hinf->kernel_ver_str));
279 hinf->kernel_ver = LINUX_VERSION_CODE;
280 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MAJOR, 0);
281 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MINOR, 0);
282 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_SUB_MINOR, 0);
283 EFA_SET(&hinf->driver_ver, EFA_ADMIN_HOST_INFO_DRIVER_MODULE_TYPE, 0);
284 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_BUS, dev->pdev->bus->number);
285 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_DEVICE,
286 PCI_SLOT(dev->pdev->devfn));
287 EFA_SET(&hinf->bdf, EFA_ADMIN_HOST_INFO_FUNCTION,
288 PCI_FUNC(dev->pdev->devfn));
289 EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MAJOR,
290 EFA_COMMON_SPEC_VERSION_MAJOR);
291 EFA_SET(&hinf->spec_ver, EFA_ADMIN_HOST_INFO_SPEC_MINOR,
292 EFA_COMMON_SPEC_VERSION_MINOR);
293 EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_INTREE, 1);
294 EFA_SET(&hinf->flags, EFA_ADMIN_HOST_INFO_GDR, 0);
295
296 efa_com_set_feature_ex(&dev->edev, &resp, &cmd, EFA_ADMIN_HOST_INFO,
297 hinf_dma, bufsz);
298
299 dma_free_coherent(&dev->pdev->dev, bufsz, hinf, hinf_dma);
300 }
301
efa_destroy_eq(struct efa_dev * dev,struct efa_eq * eq)302 static void efa_destroy_eq(struct efa_dev *dev, struct efa_eq *eq)
303 {
304 efa_com_eq_destroy(&dev->edev, &eq->eeq);
305 efa_free_irq(dev, &eq->irq);
306 }
307
efa_create_eq(struct efa_dev * dev,struct efa_eq * eq,u8 msix_vec)308 static int efa_create_eq(struct efa_dev *dev, struct efa_eq *eq, u8 msix_vec)
309 {
310 int err;
311
312 efa_setup_comp_irq(dev, eq, msix_vec);
313 err = efa_request_irq(dev, &eq->irq);
314 if (err)
315 return err;
316
317 err = efa_com_eq_init(&dev->edev, &eq->eeq, efa_process_eqe,
318 dev->dev_attr.max_eq_depth, msix_vec);
319 if (err)
320 goto err_free_comp_irq;
321
322 return 0;
323
324 err_free_comp_irq:
325 efa_free_irq(dev, &eq->irq);
326 return err;
327 }
328
efa_create_eqs(struct efa_dev * dev)329 static int efa_create_eqs(struct efa_dev *dev)
330 {
331 unsigned int neqs = dev->dev_attr.max_eq;
332 int err;
333 int i;
334
335 neqs = min_t(unsigned int, neqs,
336 dev->num_irq_vectors - EFA_COMP_EQS_VEC_BASE);
337
338 dev->neqs = neqs;
339 dev->eqs = kcalloc(neqs, sizeof(*dev->eqs), GFP_KERNEL);
340 if (!dev->eqs)
341 return -ENOMEM;
342
343 for (i = 0; i < neqs; i++) {
344 err = efa_create_eq(dev, &dev->eqs[i],
345 i + EFA_COMP_EQS_VEC_BASE);
346 if (err)
347 goto err_destroy_eqs;
348 }
349
350 return 0;
351
352 err_destroy_eqs:
353 for (i--; i >= 0; i--)
354 efa_destroy_eq(dev, &dev->eqs[i]);
355 kfree(dev->eqs);
356
357 return err;
358 }
359
efa_destroy_eqs(struct efa_dev * dev)360 static void efa_destroy_eqs(struct efa_dev *dev)
361 {
362 int i;
363
364 for (i = 0; i < dev->neqs; i++)
365 efa_destroy_eq(dev, &dev->eqs[i]);
366
367 kfree(dev->eqs);
368 }
369
370 static const struct ib_device_ops efa_dev_ops = {
371 .owner = THIS_MODULE,
372 .driver_id = RDMA_DRIVER_EFA,
373 .uverbs_abi_ver = EFA_UVERBS_ABI_VERSION,
374
375 .alloc_hw_port_stats = efa_alloc_hw_port_stats,
376 .alloc_hw_device_stats = efa_alloc_hw_device_stats,
377 .alloc_pd = efa_alloc_pd,
378 .alloc_ucontext = efa_alloc_ucontext,
379 .create_cq = efa_create_cq,
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_cq = efa_destroy_cq,
387 .destroy_qp = efa_destroy_qp,
388 .get_hw_stats = efa_get_hw_stats,
389 .get_link_layer = efa_port_link_layer,
390 .get_port_immutable = efa_get_port_immutable,
391 .mmap = efa_mmap,
392 .mmap_free = efa_mmap_free,
393 .modify_qp = efa_modify_qp,
394 .query_device = efa_query_device,
395 .query_gid = efa_query_gid,
396 .query_pkey = efa_query_pkey,
397 .query_port = efa_query_port,
398 .query_qp = efa_query_qp,
399 .reg_user_mr = efa_reg_mr,
400 .reg_user_mr_dmabuf = efa_reg_user_mr_dmabuf,
401
402 INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah),
403 INIT_RDMA_OBJ_SIZE(ib_cq, efa_cq, ibcq),
404 INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd),
405 INIT_RDMA_OBJ_SIZE(ib_qp, efa_qp, ibqp),
406 INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext),
407 };
408
efa_ib_device_add(struct efa_dev * dev)409 static int efa_ib_device_add(struct efa_dev *dev)
410 {
411 struct efa_com_get_hw_hints_result hw_hints;
412 struct pci_dev *pdev = dev->pdev;
413 int err;
414
415 efa_stats_init(dev);
416
417 err = efa_com_get_device_attr(&dev->edev, &dev->dev_attr);
418 if (err)
419 return err;
420
421 dev_dbg(&dev->pdev->dev, "Doorbells bar (%d)\n", dev->dev_attr.db_bar);
422 err = efa_request_doorbell_bar(dev);
423 if (err)
424 return err;
425
426 err = efa_com_get_hw_hints(&dev->edev, &hw_hints);
427 if (err)
428 goto err_release_doorbell_bar;
429
430 efa_update_hw_hints(dev, &hw_hints);
431
432 /* Try to enable all the available aenq groups */
433 err = efa_com_set_aenq_config(&dev->edev, EFA_AENQ_ENABLED_GROUPS);
434 if (err)
435 goto err_release_doorbell_bar;
436
437 err = efa_create_eqs(dev);
438 if (err)
439 goto err_release_doorbell_bar;
440
441 efa_set_host_info(dev);
442
443 dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED;
444 dev->ibdev.node_guid = dev->dev_attr.guid;
445 dev->ibdev.phys_port_cnt = 1;
446 dev->ibdev.num_comp_vectors = dev->neqs ?: 1;
447 dev->ibdev.dev.parent = &pdev->dev;
448
449 ib_set_device_ops(&dev->ibdev, &efa_dev_ops);
450
451 dev->ibdev.driver_def = efa_uapi_defs;
452
453 err = ib_register_device(&dev->ibdev, "efa_%d", &pdev->dev);
454 if (err)
455 goto err_destroy_eqs;
456
457 ibdev_info(&dev->ibdev, "IB device registered\n");
458
459 return 0;
460
461 err_destroy_eqs:
462 efa_destroy_eqs(dev);
463 err_release_doorbell_bar:
464 efa_release_doorbell_bar(dev);
465 return err;
466 }
467
efa_ib_device_remove(struct efa_dev * dev)468 static void efa_ib_device_remove(struct efa_dev *dev)
469 {
470 ibdev_info(&dev->ibdev, "Unregister ib device\n");
471 ib_unregister_device(&dev->ibdev);
472 efa_destroy_eqs(dev);
473 efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_NORMAL);
474 efa_release_doorbell_bar(dev);
475 }
476
efa_disable_msix(struct efa_dev * dev)477 static void efa_disable_msix(struct efa_dev *dev)
478 {
479 pci_free_irq_vectors(dev->pdev);
480 }
481
efa_enable_msix(struct efa_dev * dev)482 static int efa_enable_msix(struct efa_dev *dev)
483 {
484 int max_vecs, num_vecs;
485
486 /*
487 * Reserve the max msix vectors we might need, one vector is reserved
488 * for admin.
489 */
490 max_vecs = min_t(int, pci_msix_vec_count(dev->pdev),
491 num_online_cpus() + 1);
492 dev_dbg(&dev->pdev->dev, "Trying to enable MSI-X, vectors %d\n",
493 max_vecs);
494
495 dev->admin_msix_vector_idx = EFA_MGMNT_MSIX_VEC_IDX;
496 num_vecs = pci_alloc_irq_vectors(dev->pdev, 1,
497 max_vecs, PCI_IRQ_MSIX);
498
499 if (num_vecs < 0) {
500 dev_err(&dev->pdev->dev, "Failed to enable MSI-X. error %d\n",
501 num_vecs);
502 return -ENOSPC;
503 }
504
505 dev_dbg(&dev->pdev->dev, "Allocated %d MSI-X vectors\n", num_vecs);
506
507 dev->num_irq_vectors = num_vecs;
508
509 return 0;
510 }
511
efa_device_init(struct efa_com_dev * edev,struct pci_dev * pdev)512 static int efa_device_init(struct efa_com_dev *edev, struct pci_dev *pdev)
513 {
514 int dma_width;
515 int err;
516
517 err = efa_com_dev_reset(edev, EFA_REGS_RESET_NORMAL);
518 if (err)
519 return err;
520
521 err = efa_com_validate_version(edev);
522 if (err)
523 return err;
524
525 dma_width = efa_com_get_dma_width(edev);
526 if (dma_width < 0) {
527 err = dma_width;
528 return err;
529 }
530
531 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_width));
532 if (err) {
533 dev_err(&pdev->dev, "dma_set_mask_and_coherent failed %d\n", err);
534 return err;
535 }
536
537 dma_set_max_seg_size(&pdev->dev, UINT_MAX);
538 return 0;
539 }
540
efa_probe_device(struct pci_dev * pdev)541 static struct efa_dev *efa_probe_device(struct pci_dev *pdev)
542 {
543 struct efa_com_dev *edev;
544 struct efa_dev *dev;
545 int pci_mem_bars;
546 int err;
547
548 err = pci_enable_device_mem(pdev);
549 if (err) {
550 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
551 return ERR_PTR(err);
552 }
553
554 pci_set_master(pdev);
555
556 dev = ib_alloc_device(efa_dev, ibdev);
557 if (!dev) {
558 dev_err(&pdev->dev, "Device alloc failed\n");
559 err = -ENOMEM;
560 goto err_disable_device;
561 }
562
563 pci_set_drvdata(pdev, dev);
564 edev = &dev->edev;
565 edev->efa_dev = dev;
566 edev->dmadev = &pdev->dev;
567 dev->pdev = pdev;
568 xa_init(&dev->cqs_xa);
569
570 pci_mem_bars = pci_select_bars(pdev, IORESOURCE_MEM);
571 if (EFA_BASE_BAR_MASK & ~pci_mem_bars) {
572 dev_err(&pdev->dev, "BARs unavailable. Requested %#x, available %#x\n",
573 (int)EFA_BASE_BAR_MASK, pci_mem_bars);
574 err = -ENODEV;
575 goto err_ibdev_destroy;
576 }
577 err = pci_request_selected_regions(pdev, EFA_BASE_BAR_MASK, DRV_MODULE_NAME);
578 if (err) {
579 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
580 err);
581 goto err_ibdev_destroy;
582 }
583
584 dev->reg_bar_addr = pci_resource_start(pdev, EFA_REG_BAR);
585 dev->reg_bar_len = pci_resource_len(pdev, EFA_REG_BAR);
586 dev->mem_bar_addr = pci_resource_start(pdev, EFA_MEM_BAR);
587 dev->mem_bar_len = pci_resource_len(pdev, EFA_MEM_BAR);
588
589 edev->reg_bar = devm_ioremap(&pdev->dev,
590 dev->reg_bar_addr,
591 dev->reg_bar_len);
592 if (!edev->reg_bar) {
593 dev_err(&pdev->dev, "Failed to remap register bar\n");
594 err = -EFAULT;
595 goto err_release_bars;
596 }
597
598 err = efa_com_mmio_reg_read_init(edev);
599 if (err) {
600 dev_err(&pdev->dev, "Failed to init readless MMIO\n");
601 goto err_iounmap;
602 }
603
604 err = efa_device_init(edev, pdev);
605 if (err) {
606 dev_err(&pdev->dev, "EFA device init failed\n");
607 if (err == -ETIME)
608 err = -EPROBE_DEFER;
609 goto err_reg_read_destroy;
610 }
611
612 err = efa_enable_msix(dev);
613 if (err)
614 goto err_reg_read_destroy;
615
616 edev->aq.msix_vector_idx = dev->admin_msix_vector_idx;
617 edev->aenq.msix_vector_idx = dev->admin_msix_vector_idx;
618
619 err = efa_set_mgmnt_irq(dev);
620 if (err)
621 goto err_disable_msix;
622
623 err = efa_com_admin_init(edev, &aenq_handlers);
624 if (err)
625 goto err_free_mgmnt_irq;
626
627 return dev;
628
629 err_free_mgmnt_irq:
630 efa_free_irq(dev, &dev->admin_irq);
631 err_disable_msix:
632 efa_disable_msix(dev);
633 err_reg_read_destroy:
634 efa_com_mmio_reg_read_destroy(edev);
635 err_iounmap:
636 devm_iounmap(&pdev->dev, edev->reg_bar);
637 err_release_bars:
638 efa_release_bars(dev, EFA_BASE_BAR_MASK);
639 err_ibdev_destroy:
640 ib_dealloc_device(&dev->ibdev);
641 err_disable_device:
642 pci_disable_device(pdev);
643 return ERR_PTR(err);
644 }
645
efa_remove_device(struct pci_dev * pdev)646 static void efa_remove_device(struct pci_dev *pdev)
647 {
648 struct efa_dev *dev = pci_get_drvdata(pdev);
649 struct efa_com_dev *edev;
650
651 edev = &dev->edev;
652 efa_com_admin_destroy(edev);
653 efa_free_irq(dev, &dev->admin_irq);
654 efa_disable_msix(dev);
655 efa_com_mmio_reg_read_destroy(edev);
656 devm_iounmap(&pdev->dev, edev->reg_bar);
657 efa_release_bars(dev, EFA_BASE_BAR_MASK);
658 xa_destroy(&dev->cqs_xa);
659 ib_dealloc_device(&dev->ibdev);
660 pci_disable_device(pdev);
661 }
662
efa_probe(struct pci_dev * pdev,const struct pci_device_id * ent)663 static int efa_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
664 {
665 struct efa_dev *dev;
666 int err;
667
668 dev = efa_probe_device(pdev);
669 if (IS_ERR(dev))
670 return PTR_ERR(dev);
671
672 err = efa_ib_device_add(dev);
673 if (err)
674 goto err_remove_device;
675
676 return 0;
677
678 err_remove_device:
679 efa_remove_device(pdev);
680 return err;
681 }
682
efa_remove(struct pci_dev * pdev)683 static void efa_remove(struct pci_dev *pdev)
684 {
685 struct efa_dev *dev = pci_get_drvdata(pdev);
686
687 efa_ib_device_remove(dev);
688 efa_remove_device(pdev);
689 }
690
efa_shutdown(struct pci_dev * pdev)691 static void efa_shutdown(struct pci_dev *pdev)
692 {
693 struct efa_dev *dev = pci_get_drvdata(pdev);
694
695 efa_destroy_eqs(dev);
696 efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_SHUTDOWN);
697 efa_free_irq(dev, &dev->admin_irq);
698 efa_disable_msix(dev);
699 }
700
701 static struct pci_driver efa_pci_driver = {
702 .name = DRV_MODULE_NAME,
703 .id_table = efa_pci_tbl,
704 .probe = efa_probe,
705 .remove = efa_remove,
706 .shutdown = efa_shutdown,
707 };
708
709 module_pci_driver(efa_pci_driver);
710