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 */ 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 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 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 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 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 } 109 110 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 } 119 120 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 } 129 130 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 } 145 146 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 } 159 160 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 } 165 166 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 } 184 185 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 } 191 192 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 } 224 225 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 } 230 231 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 } 247 248 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 } 256 257 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 } 302 303 static void efa_destroy_eq(struct efa_dev *dev, struct efa_eq *eq) 304 { 305 efa_com_eq_destroy(&dev->edev, &eq->eeq); 306 efa_free_irq(dev, &eq->irq); 307 } 308 309 static int efa_create_eq(struct efa_dev *dev, struct efa_eq *eq, u32 msix_vec) 310 { 311 int err; 312 313 efa_setup_comp_irq(dev, eq, msix_vec); 314 err = efa_request_irq(dev, &eq->irq); 315 if (err) 316 return err; 317 318 err = efa_com_eq_init(&dev->edev, &eq->eeq, efa_process_eqe, 319 dev->dev_attr.max_eq_depth, msix_vec); 320 if (err) 321 goto err_free_comp_irq; 322 323 return 0; 324 325 err_free_comp_irq: 326 efa_free_irq(dev, &eq->irq); 327 return err; 328 } 329 330 static int efa_create_eqs(struct efa_dev *dev) 331 { 332 u32 neqs = dev->dev_attr.max_eq; 333 int err, i; 334 335 neqs = min_t(u32, neqs, dev->num_irq_vectors - EFA_COMP_EQS_VEC_BASE); 336 dev->neqs = neqs; 337 dev->eqs = kzalloc_objs(*dev->eqs, neqs); 338 if (!dev->eqs) 339 return -ENOMEM; 340 341 for (i = 0; i < neqs; i++) { 342 err = efa_create_eq(dev, &dev->eqs[i], i + EFA_COMP_EQS_VEC_BASE); 343 if (err) 344 goto err_destroy_eqs; 345 } 346 347 return 0; 348 349 err_destroy_eqs: 350 for (i--; i >= 0; i--) 351 efa_destroy_eq(dev, &dev->eqs[i]); 352 kfree(dev->eqs); 353 354 return err; 355 } 356 357 static void efa_destroy_eqs(struct efa_dev *dev) 358 { 359 int i; 360 361 for (i = 0; i < dev->neqs; i++) 362 efa_destroy_eq(dev, &dev->eqs[i]); 363 364 kfree(dev->eqs); 365 } 366 367 static const struct ib_device_ops efa_dev_ops = { 368 .owner = THIS_MODULE, 369 .driver_id = RDMA_DRIVER_EFA, 370 .uverbs_abi_ver = EFA_UVERBS_ABI_VERSION, 371 372 .alloc_hw_port_stats = efa_alloc_hw_port_stats, 373 .alloc_hw_device_stats = efa_alloc_hw_device_stats, 374 .alloc_pd = efa_alloc_pd, 375 .alloc_ucontext = efa_alloc_ucontext, 376 .create_user_cq = efa_create_user_cq, 377 .create_comp_cntr = efa_create_comp_cntr, 378 .create_qp = efa_create_qp, 379 .create_user_ah = efa_create_ah, 380 .dealloc_pd = efa_dealloc_pd, 381 .dealloc_ucontext = efa_dealloc_ucontext, 382 .dereg_mr = efa_dereg_mr, 383 .destroy_ah = efa_destroy_ah, 384 .destroy_comp_cntr = efa_destroy_comp_cntr, 385 .destroy_cq = efa_destroy_cq, 386 .destroy_qp = efa_destroy_qp, 387 .get_hw_stats = efa_get_hw_stats, 388 .get_link_layer = efa_port_link_layer, 389 .get_port_immutable = efa_get_port_immutable, 390 .modify_comp_cntr = efa_modify_comp_cntr, 391 .mmap = efa_mmap, 392 .mmap_free = efa_mmap_free, 393 .modify_qp = efa_modify_qp, 394 .qp_attach_comp_cntr = efa_qp_attach_comp_cntr, 395 .query_comp_cntr_caps = efa_query_comp_cntr_caps, 396 .query_device = efa_query_device, 397 .query_gid = efa_query_gid, 398 .query_pkey = efa_query_pkey, 399 .query_port = efa_query_port, 400 .query_port_speed = efa_query_port_speed, 401 .query_qp = efa_query_qp, 402 .reg_user_mr = efa_reg_mr, 403 .reg_user_mr_dmabuf = efa_reg_user_mr_dmabuf, 404 405 INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah), 406 INIT_RDMA_OBJ_SIZE(ib_cq, efa_cq, ibcq), 407 INIT_RDMA_OBJ_SIZE(ib_comp_cntr, efa_comp_cntr, ibcc), 408 INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd), 409 INIT_RDMA_OBJ_SIZE(ib_qp, efa_qp, ibqp), 410 INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext), 411 }; 412 413 static int efa_ib_device_add(struct efa_dev *dev) 414 { 415 struct efa_com_get_hw_hints_result hw_hints; 416 struct pci_dev *pdev = dev->pdev; 417 int err; 418 419 efa_stats_init(dev); 420 421 err = efa_com_get_device_attr(&dev->edev, &dev->dev_attr); 422 if (err) 423 return err; 424 425 dev_dbg(&dev->pdev->dev, "Doorbells bar (%d)\n", dev->dev_attr.db_bar); 426 err = efa_request_doorbell_bar(dev); 427 if (err) 428 return err; 429 430 err = efa_com_get_hw_hints(&dev->edev, &hw_hints); 431 if (err) 432 goto err_release_doorbell_bar; 433 434 efa_update_hw_hints(dev, &hw_hints); 435 436 /* Try to enable all the available aenq groups */ 437 err = efa_com_set_aenq_config(&dev->edev, EFA_AENQ_ENABLED_GROUPS); 438 if (err) 439 goto err_release_doorbell_bar; 440 441 err = efa_create_eqs(dev); 442 if (err) 443 goto err_release_doorbell_bar; 444 445 efa_set_host_info(dev); 446 447 dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED; 448 dev->ibdev.node_guid = dev->dev_attr.guid; 449 dev->ibdev.phys_port_cnt = 1; 450 dev->ibdev.num_comp_vectors = dev->neqs ?: 1; 451 dev->ibdev.dev.parent = &pdev->dev; 452 453 ib_set_device_ops(&dev->ibdev, &efa_dev_ops); 454 455 dev->ibdev.driver_def = efa_uapi_defs; 456 457 err = ib_register_device(&dev->ibdev, "efa_%d", &pdev->dev); 458 if (err) 459 goto err_destroy_eqs; 460 461 ibdev_info(&dev->ibdev, "IB device registered\n"); 462 463 return 0; 464 465 err_destroy_eqs: 466 efa_destroy_eqs(dev); 467 err_release_doorbell_bar: 468 efa_release_doorbell_bar(dev); 469 return err; 470 } 471 472 static void efa_ib_device_remove(struct efa_dev *dev) 473 { 474 ibdev_info(&dev->ibdev, "Unregister ib device\n"); 475 ib_unregister_device(&dev->ibdev); 476 efa_destroy_eqs(dev); 477 efa_release_doorbell_bar(dev); 478 } 479 480 static void efa_disable_msix(struct efa_dev *dev) 481 { 482 pci_free_irq_vectors(dev->pdev); 483 } 484 485 static int efa_enable_msix(struct efa_dev *dev) 486 { 487 int max_vecs, num_vecs; 488 489 /* 490 * Reserve the max msix vectors we might need, one vector is reserved 491 * for admin. 492 */ 493 max_vecs = min_t(int, pci_msix_vec_count(dev->pdev), 494 num_online_cpus() + 1); 495 dev_dbg(&dev->pdev->dev, "Trying to enable MSI-X, vectors %d\n", 496 max_vecs); 497 498 dev->admin_msix_vector_idx = EFA_MGMNT_MSIX_VEC_IDX; 499 num_vecs = pci_alloc_irq_vectors(dev->pdev, 1, 500 max_vecs, PCI_IRQ_MSIX); 501 502 if (num_vecs < 0) { 503 dev_err(&dev->pdev->dev, "Failed to enable MSI-X. error %d\n", 504 num_vecs); 505 return -ENOSPC; 506 } 507 508 dev_dbg(&dev->pdev->dev, "Allocated %d MSI-X vectors\n", num_vecs); 509 510 dev->num_irq_vectors = num_vecs; 511 512 return 0; 513 } 514 515 static int efa_device_init(struct efa_com_dev *edev, struct pci_dev *pdev) 516 { 517 int dma_width; 518 int err; 519 520 err = efa_com_dev_reset(edev, EFA_REGS_RESET_NORMAL); 521 if (err) 522 return err; 523 524 err = efa_com_validate_version(edev); 525 if (err) 526 return err; 527 528 dma_width = efa_com_get_dma_width(edev); 529 if (dma_width < 0) { 530 err = dma_width; 531 return err; 532 } 533 534 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_width)); 535 if (err) { 536 dev_err(&pdev->dev, "dma_set_mask_and_coherent failed %d\n", err); 537 return err; 538 } 539 540 dma_set_max_seg_size(&pdev->dev, UINT_MAX); 541 return 0; 542 } 543 544 static struct efa_dev *efa_probe_device(struct pci_dev *pdev) 545 { 546 struct efa_com_dev *edev; 547 struct efa_dev *dev; 548 int pci_mem_bars; 549 int err; 550 551 err = pci_enable_device_mem(pdev); 552 if (err) { 553 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n"); 554 return ERR_PTR(err); 555 } 556 557 pci_set_master(pdev); 558 559 dev = ib_alloc_device(efa_dev, ibdev); 560 if (!dev) { 561 dev_err(&pdev->dev, "Device alloc failed\n"); 562 err = -ENOMEM; 563 goto err_disable_device; 564 } 565 566 pci_set_drvdata(pdev, dev); 567 edev = &dev->edev; 568 edev->efa_dev = dev; 569 edev->dmadev = &pdev->dev; 570 dev->pdev = pdev; 571 xa_init(&dev->cqs_xa); 572 573 pci_mem_bars = pci_select_bars(pdev, IORESOURCE_MEM); 574 if (EFA_BASE_BAR_MASK & ~pci_mem_bars) { 575 dev_err(&pdev->dev, "BARs unavailable. Requested %#x, available %#x\n", 576 (int)EFA_BASE_BAR_MASK, pci_mem_bars); 577 err = -ENODEV; 578 goto err_ibdev_destroy; 579 } 580 err = pci_request_selected_regions(pdev, EFA_BASE_BAR_MASK, DRV_MODULE_NAME); 581 if (err) { 582 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n", 583 err); 584 goto err_ibdev_destroy; 585 } 586 587 dev->reg_bar_addr = pci_resource_start(pdev, EFA_REG_BAR); 588 dev->reg_bar_len = pci_resource_len(pdev, EFA_REG_BAR); 589 dev->mem_bar_addr = pci_resource_start(pdev, EFA_MEM_BAR); 590 dev->mem_bar_len = pci_resource_len(pdev, EFA_MEM_BAR); 591 592 edev->reg_bar = devm_ioremap(&pdev->dev, 593 dev->reg_bar_addr, 594 dev->reg_bar_len); 595 if (!edev->reg_bar) { 596 dev_err(&pdev->dev, "Failed to remap register bar\n"); 597 err = -EFAULT; 598 goto err_release_bars; 599 } 600 601 err = efa_com_mmio_reg_read_init(edev); 602 if (err) { 603 dev_err(&pdev->dev, "Failed to init readless MMIO\n"); 604 goto err_iounmap; 605 } 606 607 err = efa_device_init(edev, pdev); 608 if (err) { 609 dev_err(&pdev->dev, "EFA device init failed\n"); 610 if (err == -ETIME) 611 err = -EPROBE_DEFER; 612 goto err_reg_read_destroy; 613 } 614 615 err = efa_enable_msix(dev); 616 if (err) 617 goto err_reg_read_destroy; 618 619 edev->aq.msix_vector_idx = dev->admin_msix_vector_idx; 620 edev->aenq.msix_vector_idx = dev->admin_msix_vector_idx; 621 622 err = efa_set_mgmnt_irq(dev); 623 if (err) 624 goto err_disable_msix; 625 626 err = efa_com_admin_init(edev, &aenq_handlers); 627 if (err) 628 goto err_free_mgmnt_irq; 629 630 return dev; 631 632 err_free_mgmnt_irq: 633 efa_free_irq(dev, &dev->admin_irq); 634 err_disable_msix: 635 efa_disable_msix(dev); 636 err_reg_read_destroy: 637 efa_com_mmio_reg_read_destroy(edev); 638 err_iounmap: 639 devm_iounmap(&pdev->dev, edev->reg_bar); 640 err_release_bars: 641 efa_release_bars(dev, EFA_BASE_BAR_MASK); 642 err_ibdev_destroy: 643 ib_dealloc_device(&dev->ibdev); 644 err_disable_device: 645 pci_disable_device(pdev); 646 return ERR_PTR(err); 647 } 648 649 static void efa_remove_device(struct pci_dev *pdev, 650 enum efa_regs_reset_reason_types reset_reason) 651 { 652 struct efa_dev *dev = pci_get_drvdata(pdev); 653 struct efa_com_dev *edev; 654 655 edev = &dev->edev; 656 efa_com_dev_reset(edev, reset_reason); 657 efa_com_admin_destroy(edev); 658 efa_free_irq(dev, &dev->admin_irq); 659 efa_disable_msix(dev); 660 efa_com_mmio_reg_read_destroy(edev); 661 devm_iounmap(&pdev->dev, edev->reg_bar); 662 efa_release_bars(dev, EFA_BASE_BAR_MASK); 663 xa_destroy(&dev->cqs_xa); 664 ib_dealloc_device(&dev->ibdev); 665 pci_disable_device(pdev); 666 } 667 668 static int efa_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 669 { 670 struct efa_dev *dev; 671 int err; 672 673 dev = efa_probe_device(pdev); 674 if (IS_ERR(dev)) 675 return PTR_ERR(dev); 676 677 err = efa_ib_device_add(dev); 678 if (err) 679 goto err_remove_device; 680 681 return 0; 682 683 err_remove_device: 684 efa_remove_device(pdev, EFA_REGS_RESET_INIT_ERR); 685 return err; 686 } 687 688 static void efa_remove(struct pci_dev *pdev) 689 { 690 struct efa_dev *dev = pci_get_drvdata(pdev); 691 692 efa_ib_device_remove(dev); 693 efa_remove_device(pdev, EFA_REGS_RESET_NORMAL); 694 } 695 696 static void efa_shutdown(struct pci_dev *pdev) 697 { 698 struct efa_dev *dev = pci_get_drvdata(pdev); 699 700 efa_destroy_eqs(dev); 701 efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_SHUTDOWN); 702 efa_free_irq(dev, &dev->admin_irq); 703 efa_disable_msix(dev); 704 } 705 706 static struct pci_driver efa_pci_driver = { 707 .name = DRV_MODULE_NAME, 708 .id_table = efa_pci_tbl, 709 .probe = efa_probe, 710 .remove = efa_remove, 711 .shutdown = efa_shutdown, 712 }; 713 714 module_pci_driver(efa_pci_driver); 715