1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 3 /* Authors: Cheng Xu <chengyou@linux.alibaba.com> */ 4 /* Kai Shen <kaishen@linux.alibaba.com> */ 5 /* Copyright (c) 2020-2022, Alibaba Group. */ 6 7 #include <linux/module.h> 8 #include <net/addrconf.h> 9 #include <rdma/erdma-abi.h> 10 11 #include "erdma.h" 12 #include "erdma_cm.h" 13 #include "erdma_verbs.h" 14 15 MODULE_AUTHOR("Cheng Xu <chengyou@linux.alibaba.com>"); 16 MODULE_DESCRIPTION("Alibaba elasticRDMA adapter driver"); 17 MODULE_LICENSE("Dual BSD/GPL"); 18 19 static int erdma_netdev_event(struct notifier_block *nb, unsigned long event, 20 void *arg) 21 { 22 struct net_device *netdev = netdev_notifier_info_to_dev(arg); 23 struct erdma_dev *dev = container_of(nb, struct erdma_dev, netdev_nb); 24 25 if (dev->netdev == NULL || dev->netdev != netdev) 26 goto done; 27 28 switch (event) { 29 case NETDEV_CHANGEMTU: 30 if (dev->mtu != netdev->mtu) { 31 erdma_set_mtu(dev, netdev->mtu); 32 dev->mtu = netdev->mtu; 33 } 34 break; 35 case NETDEV_REGISTER: 36 case NETDEV_UNREGISTER: 37 case NETDEV_CHANGEADDR: 38 case NETDEV_GOING_DOWN: 39 case NETDEV_CHANGE: 40 default: 41 break; 42 } 43 44 done: 45 return NOTIFY_OK; 46 } 47 48 static int erdma_enum_and_get_netdev(struct erdma_dev *dev) 49 { 50 struct net_device *netdev; 51 int ret = -EPROBE_DEFER; 52 53 /* Already binded to a net_device, so we skip. */ 54 if (dev->netdev) 55 return 0; 56 57 rtnl_lock(); 58 for_each_netdev(&init_net, netdev) { 59 /* 60 * In erdma, the paired netdev and ibdev should have the same 61 * MAC address. erdma can get the value from its PCIe bar 62 * registers. Since erdma can not get the paired netdev 63 * reference directly, we do a traverse here to get the paired 64 * netdev. 65 */ 66 if (ether_addr_equal_unaligned(netdev->perm_addr, 67 dev->attrs.peer_addr)) { 68 ret = ib_device_set_netdev(&dev->ibdev, netdev, 1); 69 if (ret) { 70 rtnl_unlock(); 71 ibdev_warn(&dev->ibdev, 72 "failed (%d) to link netdev", ret); 73 return ret; 74 } 75 76 dev->netdev = netdev; 77 break; 78 } 79 } 80 81 rtnl_unlock(); 82 83 return ret; 84 } 85 86 static int erdma_device_register(struct erdma_dev *dev) 87 { 88 struct ib_device *ibdev = &dev->ibdev; 89 int ret; 90 91 ret = erdma_enum_and_get_netdev(dev); 92 if (ret) 93 return ret; 94 95 dev->mtu = dev->netdev->mtu; 96 addrconf_addr_eui48((u8 *)&ibdev->node_guid, dev->netdev->dev_addr); 97 98 ret = ib_register_device(ibdev, "erdma_%d", &dev->pdev->dev); 99 if (ret) { 100 dev_err(&dev->pdev->dev, 101 "ib_register_device failed: ret = %d\n", ret); 102 return ret; 103 } 104 105 dev->netdev_nb.notifier_call = erdma_netdev_event; 106 ret = register_netdevice_notifier(&dev->netdev_nb); 107 if (ret) { 108 ibdev_err(&dev->ibdev, "failed to register notifier.\n"); 109 ib_unregister_device(ibdev); 110 } 111 112 return ret; 113 } 114 115 static irqreturn_t erdma_comm_irq_handler(int irq, void *data) 116 { 117 struct erdma_dev *dev = data; 118 119 erdma_cmdq_completion_handler(&dev->cmdq); 120 erdma_aeq_event_handler(dev); 121 122 return IRQ_HANDLED; 123 } 124 125 static int erdma_request_vectors(struct erdma_dev *dev) 126 { 127 int expect_irq_num = min(num_possible_cpus() + 1, ERDMA_NUM_MSIX_VEC); 128 int ret; 129 130 ret = pci_alloc_irq_vectors(dev->pdev, 1, expect_irq_num, PCI_IRQ_MSIX); 131 if (ret < 0) { 132 dev_err(&dev->pdev->dev, "request irq vectors failed(%d)\n", 133 ret); 134 return ret; 135 } 136 dev->attrs.irq_num = ret; 137 138 return 0; 139 } 140 141 static int erdma_comm_irq_init(struct erdma_dev *dev) 142 { 143 snprintf(dev->comm_irq.name, ERDMA_IRQNAME_SIZE, "erdma-common@pci:%s", 144 pci_name(dev->pdev)); 145 dev->comm_irq.msix_vector = 146 pci_irq_vector(dev->pdev, ERDMA_MSIX_VECTOR_CMDQ); 147 148 cpumask_set_cpu(cpumask_first(cpumask_of_pcibus(dev->pdev->bus)), 149 &dev->comm_irq.affinity_hint_mask); 150 irq_set_affinity_hint(dev->comm_irq.msix_vector, 151 &dev->comm_irq.affinity_hint_mask); 152 153 return request_irq(dev->comm_irq.msix_vector, erdma_comm_irq_handler, 0, 154 dev->comm_irq.name, dev); 155 } 156 157 static void erdma_comm_irq_uninit(struct erdma_dev *dev) 158 { 159 irq_set_affinity_hint(dev->comm_irq.msix_vector, NULL); 160 free_irq(dev->comm_irq.msix_vector, dev); 161 } 162 163 static int erdma_device_init(struct erdma_dev *dev, struct pci_dev *pdev) 164 { 165 int ret; 166 167 dev->proto = erdma_reg_read32(dev, ERDMA_REGS_DEV_PROTO_REG); 168 169 dev->resp_pool = dma_pool_create("erdma_resp_pool", &pdev->dev, 170 ERDMA_HW_RESP_SIZE, ERDMA_HW_RESP_SIZE, 171 0); 172 if (!dev->resp_pool) 173 return -ENOMEM; 174 175 dev->db_pool = dma_pool_create("erdma_db_pool", &pdev->dev, 176 ERDMA_DB_SIZE, ERDMA_DB_SIZE, 0); 177 if (!dev->db_pool) { 178 ret = -ENOMEM; 179 goto destroy_resp_pool; 180 } 181 182 ret = dma_set_mask_and_coherent(&pdev->dev, 183 DMA_BIT_MASK(ERDMA_PCI_WIDTH)); 184 if (ret) 185 goto destroy_db_pool; 186 187 dma_set_max_seg_size(&pdev->dev, UINT_MAX); 188 189 return 0; 190 191 destroy_db_pool: 192 dma_pool_destroy(dev->db_pool); 193 194 destroy_resp_pool: 195 dma_pool_destroy(dev->resp_pool); 196 197 return ret; 198 } 199 200 static void erdma_device_uninit(struct erdma_dev *dev) 201 { 202 dma_pool_destroy(dev->db_pool); 203 dma_pool_destroy(dev->resp_pool); 204 } 205 206 static void erdma_hw_reset(struct erdma_dev *dev) 207 { 208 u32 ctrl = FIELD_PREP(ERDMA_REG_DEV_CTRL_RESET_MASK, 1); 209 210 erdma_reg_write32(dev, ERDMA_REGS_DEV_CTRL_REG, ctrl); 211 } 212 213 static int erdma_wait_hw_init_done(struct erdma_dev *dev) 214 { 215 int i; 216 217 erdma_reg_write32(dev, ERDMA_REGS_DEV_CTRL_REG, 218 FIELD_PREP(ERDMA_REG_DEV_CTRL_INIT_MASK, 1)); 219 220 for (i = 0; i < ERDMA_WAIT_DEV_DONE_CNT; i++) { 221 if (erdma_reg_read32_filed(dev, ERDMA_REGS_DEV_ST_REG, 222 ERDMA_REG_DEV_ST_INIT_DONE_MASK)) 223 break; 224 225 msleep(ERDMA_REG_ACCESS_WAIT_MS); 226 } 227 228 if (i == ERDMA_WAIT_DEV_DONE_CNT) { 229 dev_err(&dev->pdev->dev, "wait init done failed.\n"); 230 return -ETIMEDOUT; 231 } 232 233 return 0; 234 } 235 236 static const struct pci_device_id erdma_pci_tbl[] = { 237 { PCI_DEVICE(PCI_VENDOR_ID_ALIBABA, 0x107f) }, 238 {} 239 }; 240 241 static int erdma_probe_dev(struct pci_dev *pdev) 242 { 243 struct erdma_dev *dev; 244 int bars, err; 245 u32 version; 246 247 err = pci_enable_device(pdev); 248 if (err) { 249 dev_err(&pdev->dev, "pci_enable_device failed(%d)\n", err); 250 return err; 251 } 252 253 pci_set_master(pdev); 254 255 dev = ib_alloc_device(erdma_dev, ibdev); 256 if (!dev) { 257 dev_err(&pdev->dev, "ib_alloc_device failed\n"); 258 err = -ENOMEM; 259 goto err_disable_device; 260 } 261 262 pci_set_drvdata(pdev, dev); 263 dev->pdev = pdev; 264 265 bars = pci_select_bars(pdev, IORESOURCE_MEM); 266 err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME); 267 if (bars != ERDMA_BAR_MASK || err) { 268 err = err ? err : -EINVAL; 269 goto err_ib_device_release; 270 } 271 272 dev->func_bar_addr = pci_resource_start(pdev, ERDMA_FUNC_BAR); 273 dev->func_bar_len = pci_resource_len(pdev, ERDMA_FUNC_BAR); 274 275 dev->func_bar = 276 devm_ioremap(&pdev->dev, dev->func_bar_addr, dev->func_bar_len); 277 if (!dev->func_bar) { 278 dev_err(&pdev->dev, "devm_ioremap failed.\n"); 279 err = -EFAULT; 280 goto err_release_bars; 281 } 282 283 version = erdma_reg_read32(dev, ERDMA_REGS_VERSION_REG); 284 if (version == 0) { 285 /* we knows that it is a non-functional function. */ 286 err = -ENODEV; 287 goto err_iounmap_func_bar; 288 } 289 290 err = erdma_device_init(dev, pdev); 291 if (err) 292 goto err_iounmap_func_bar; 293 294 err = erdma_request_vectors(dev); 295 if (err) 296 goto err_uninit_device; 297 298 err = erdma_comm_irq_init(dev); 299 if (err) 300 goto err_free_vectors; 301 302 err = erdma_aeq_init(dev); 303 if (err) 304 goto err_uninit_comm_irq; 305 306 err = erdma_cmdq_init(dev); 307 if (err) 308 goto err_uninit_aeq; 309 310 err = erdma_wait_hw_init_done(dev); 311 if (err) 312 goto err_uninit_cmdq; 313 314 err = erdma_ceqs_init(dev); 315 if (err) 316 goto err_reset_hw; 317 318 erdma_finish_cmdq_init(dev); 319 320 return 0; 321 322 err_reset_hw: 323 erdma_hw_reset(dev); 324 325 err_uninit_cmdq: 326 erdma_cmdq_destroy(dev); 327 328 err_uninit_aeq: 329 erdma_eq_destroy(dev, &dev->aeq); 330 331 err_uninit_comm_irq: 332 erdma_comm_irq_uninit(dev); 333 334 err_free_vectors: 335 pci_free_irq_vectors(dev->pdev); 336 337 err_uninit_device: 338 erdma_device_uninit(dev); 339 340 err_iounmap_func_bar: 341 devm_iounmap(&pdev->dev, dev->func_bar); 342 343 err_release_bars: 344 pci_release_selected_regions(pdev, bars); 345 346 err_ib_device_release: 347 ib_dealloc_device(&dev->ibdev); 348 349 err_disable_device: 350 pci_disable_device(pdev); 351 352 return err; 353 } 354 355 static void erdma_remove_dev(struct pci_dev *pdev) 356 { 357 struct erdma_dev *dev = pci_get_drvdata(pdev); 358 359 erdma_ceqs_uninit(dev); 360 erdma_hw_reset(dev); 361 erdma_cmdq_destroy(dev); 362 erdma_eq_destroy(dev, &dev->aeq); 363 erdma_comm_irq_uninit(dev); 364 pci_free_irq_vectors(dev->pdev); 365 erdma_device_uninit(dev); 366 367 devm_iounmap(&pdev->dev, dev->func_bar); 368 pci_release_selected_regions(pdev, ERDMA_BAR_MASK); 369 370 ib_dealloc_device(&dev->ibdev); 371 372 pci_disable_device(pdev); 373 } 374 375 #define ERDMA_GET_CAP(name, cap) FIELD_GET(ERDMA_CMD_DEV_CAP_##name##_MASK, cap) 376 377 static int erdma_dev_attrs_init(struct erdma_dev *dev) 378 { 379 int err; 380 u64 req_hdr, cap0, cap1; 381 382 erdma_cmdq_build_reqhdr(&req_hdr, CMDQ_SUBMOD_RDMA, 383 CMDQ_OPCODE_QUERY_DEVICE); 384 385 err = erdma_post_cmd_wait(&dev->cmdq, &req_hdr, sizeof(req_hdr), &cap0, 386 &cap1, true); 387 if (err) 388 return err; 389 390 dev->attrs.max_cqe = 1 << ERDMA_GET_CAP(MAX_CQE, cap0); 391 dev->attrs.max_mr_size = 1ULL << ERDMA_GET_CAP(MAX_MR_SIZE, cap0); 392 dev->attrs.max_mw = 1 << ERDMA_GET_CAP(MAX_MW, cap1); 393 dev->attrs.max_recv_wr = 1 << ERDMA_GET_CAP(MAX_RECV_WR, cap0); 394 dev->attrs.max_gid = 1 << ERDMA_GET_CAP(MAX_GID, cap0); 395 dev->attrs.max_ah = 1 << ERDMA_GET_CAP(MAX_AH, cap0); 396 dev->attrs.local_dma_key = ERDMA_GET_CAP(DMA_LOCAL_KEY, cap1); 397 dev->attrs.cc = ERDMA_GET_CAP(DEFAULT_CC, cap1); 398 dev->attrs.max_qp = ERDMA_NQP_PER_QBLOCK * ERDMA_GET_CAP(QBLOCK, cap1); 399 dev->attrs.max_mr = dev->attrs.max_qp << 1; 400 dev->attrs.max_cq = dev->attrs.max_qp << 1; 401 dev->attrs.cap_flags = ERDMA_GET_CAP(FLAGS, cap0); 402 403 dev->attrs.max_send_wr = ERDMA_MAX_SEND_WR; 404 dev->attrs.max_ord = ERDMA_MAX_ORD; 405 dev->attrs.max_ird = ERDMA_MAX_IRD; 406 dev->attrs.max_send_sge = ERDMA_MAX_SEND_SGE; 407 dev->attrs.max_recv_sge = ERDMA_MAX_RECV_SGE; 408 dev->attrs.max_sge_rd = ERDMA_MAX_SGE_RD; 409 dev->attrs.max_pd = ERDMA_MAX_PD; 410 411 dev->res_cb[ERDMA_RES_TYPE_PD].max_cap = ERDMA_MAX_PD; 412 dev->res_cb[ERDMA_RES_TYPE_STAG_IDX].max_cap = dev->attrs.max_mr; 413 dev->res_cb[ERDMA_RES_TYPE_AH].max_cap = dev->attrs.max_ah; 414 415 erdma_cmdq_build_reqhdr(&req_hdr, CMDQ_SUBMOD_COMMON, 416 CMDQ_OPCODE_QUERY_FW_INFO); 417 418 err = erdma_post_cmd_wait(&dev->cmdq, &req_hdr, sizeof(req_hdr), &cap0, 419 &cap1, true); 420 if (!err) 421 dev->attrs.fw_version = 422 FIELD_GET(ERDMA_CMD_INFO0_FW_VER_MASK, cap0); 423 424 return err; 425 } 426 427 static int erdma_device_config(struct erdma_dev *dev) 428 { 429 struct erdma_cmdq_config_device_req req = {}; 430 431 if (!(dev->attrs.cap_flags & ERDMA_DEV_CAP_FLAGS_EXTEND_DB)) 432 return 0; 433 434 erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_COMMON, 435 CMDQ_OPCODE_CONF_DEVICE); 436 437 req.cfg = FIELD_PREP(ERDMA_CMD_CONFIG_DEVICE_PGSHIFT_MASK, PAGE_SHIFT) | 438 FIELD_PREP(ERDMA_CMD_CONFIG_DEVICE_PS_EN_MASK, 1); 439 440 return erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL, 441 true); 442 } 443 444 static int erdma_res_cb_init(struct erdma_dev *dev) 445 { 446 int i, j; 447 448 for (i = 0; i < ERDMA_RES_CNT; i++) { 449 dev->res_cb[i].next_alloc_idx = 1; 450 spin_lock_init(&dev->res_cb[i].lock); 451 dev->res_cb[i].bitmap = 452 bitmap_zalloc(dev->res_cb[i].max_cap, GFP_KERNEL); 453 if (!dev->res_cb[i].bitmap) 454 goto err; 455 } 456 457 return 0; 458 459 err: 460 for (j = 0; j < i; j++) 461 bitmap_free(dev->res_cb[j].bitmap); 462 463 return -ENOMEM; 464 } 465 466 static void erdma_res_cb_free(struct erdma_dev *dev) 467 { 468 int i; 469 470 for (i = 0; i < ERDMA_RES_CNT; i++) 471 bitmap_free(dev->res_cb[i].bitmap); 472 } 473 474 static const struct ib_device_ops erdma_device_ops_rocev2 = { 475 .get_link_layer = erdma_get_link_layer, 476 .add_gid = erdma_add_gid, 477 .del_gid = erdma_del_gid, 478 .query_pkey = erdma_query_pkey, 479 .create_ah = erdma_create_ah, 480 .destroy_ah = erdma_destroy_ah, 481 .query_ah = erdma_query_ah, 482 483 INIT_RDMA_OBJ_SIZE(ib_ah, erdma_ah, ibah), 484 }; 485 486 static const struct ib_device_ops erdma_device_ops_iwarp = { 487 .iw_accept = erdma_accept, 488 .iw_add_ref = erdma_qp_get_ref, 489 .iw_connect = erdma_connect, 490 .iw_create_listen = erdma_create_listen, 491 .iw_destroy_listen = erdma_destroy_listen, 492 .iw_get_qp = erdma_get_ibqp, 493 .iw_reject = erdma_reject, 494 .iw_rem_ref = erdma_qp_put_ref, 495 }; 496 497 static const struct ib_device_ops erdma_device_ops = { 498 .owner = THIS_MODULE, 499 .driver_id = RDMA_DRIVER_ERDMA, 500 .uverbs_abi_ver = ERDMA_ABI_VERSION, 501 502 .alloc_hw_port_stats = erdma_alloc_hw_port_stats, 503 .alloc_mr = erdma_ib_alloc_mr, 504 .alloc_pd = erdma_alloc_pd, 505 .alloc_ucontext = erdma_alloc_ucontext, 506 .create_cq = erdma_create_cq, 507 .create_qp = erdma_create_qp, 508 .dealloc_pd = erdma_dealloc_pd, 509 .dealloc_ucontext = erdma_dealloc_ucontext, 510 .dereg_mr = erdma_dereg_mr, 511 .destroy_cq = erdma_destroy_cq, 512 .destroy_qp = erdma_destroy_qp, 513 .disassociate_ucontext = erdma_disassociate_ucontext, 514 .get_dma_mr = erdma_get_dma_mr, 515 .get_hw_stats = erdma_get_hw_stats, 516 .get_port_immutable = erdma_get_port_immutable, 517 .map_mr_sg = erdma_map_mr_sg, 518 .mmap = erdma_mmap, 519 .mmap_free = erdma_mmap_free, 520 .post_recv = erdma_post_recv, 521 .post_send = erdma_post_send, 522 .poll_cq = erdma_poll_cq, 523 .query_device = erdma_query_device, 524 .query_gid = erdma_query_gid, 525 .query_port = erdma_query_port, 526 .query_qp = erdma_query_qp, 527 .req_notify_cq = erdma_req_notify_cq, 528 .reg_user_mr = erdma_reg_user_mr, 529 .modify_qp = erdma_modify_qp, 530 531 INIT_RDMA_OBJ_SIZE(ib_cq, erdma_cq, ibcq), 532 INIT_RDMA_OBJ_SIZE(ib_pd, erdma_pd, ibpd), 533 INIT_RDMA_OBJ_SIZE(ib_ucontext, erdma_ucontext, ibucontext), 534 INIT_RDMA_OBJ_SIZE(ib_qp, erdma_qp, ibqp), 535 }; 536 537 static int erdma_ib_device_add(struct pci_dev *pdev) 538 { 539 struct erdma_dev *dev = pci_get_drvdata(pdev); 540 struct ib_device *ibdev = &dev->ibdev; 541 u64 mac; 542 int ret; 543 544 ret = erdma_dev_attrs_init(dev); 545 if (ret) 546 return ret; 547 548 ret = erdma_device_config(dev); 549 if (ret) 550 return ret; 551 552 if (erdma_device_iwarp(dev)) { 553 ibdev->node_type = RDMA_NODE_RNIC; 554 ib_set_device_ops(ibdev, &erdma_device_ops_iwarp); 555 } else { 556 ibdev->node_type = RDMA_NODE_IB_CA; 557 ib_set_device_ops(ibdev, &erdma_device_ops_rocev2); 558 } 559 560 memcpy(ibdev->node_desc, ERDMA_NODE_DESC, sizeof(ERDMA_NODE_DESC)); 561 562 /* 563 * Current model (one-to-one device association): 564 * One ERDMA device per net_device or, equivalently, 565 * per physical port. 566 */ 567 ibdev->phys_port_cnt = 1; 568 ibdev->num_comp_vectors = dev->attrs.irq_num - 1; 569 570 ib_set_device_ops(ibdev, &erdma_device_ops); 571 572 INIT_LIST_HEAD(&dev->cep_list); 573 574 spin_lock_init(&dev->lock); 575 xa_init_flags(&dev->qp_xa, XA_FLAGS_ALLOC1); 576 xa_init_flags(&dev->cq_xa, XA_FLAGS_ALLOC1); 577 dev->next_alloc_cqn = 1; 578 dev->next_alloc_qpn = 1; 579 580 ret = erdma_res_cb_init(dev); 581 if (ret) 582 return ret; 583 584 atomic_set(&dev->num_ctx, 0); 585 586 mac = erdma_reg_read32(dev, ERDMA_REGS_NETDEV_MAC_L_REG); 587 mac |= (u64)erdma_reg_read32(dev, ERDMA_REGS_NETDEV_MAC_H_REG) << 32; 588 589 u64_to_ether_addr(mac, dev->attrs.peer_addr); 590 591 dev->reflush_wq = alloc_workqueue("erdma-reflush-wq", WQ_UNBOUND, 592 WQ_UNBOUND_MAX_ACTIVE); 593 if (!dev->reflush_wq) { 594 ret = -ENOMEM; 595 goto err_alloc_workqueue; 596 } 597 598 ret = erdma_device_register(dev); 599 if (ret) 600 goto err_register; 601 602 return 0; 603 604 err_register: 605 destroy_workqueue(dev->reflush_wq); 606 err_alloc_workqueue: 607 xa_destroy(&dev->qp_xa); 608 xa_destroy(&dev->cq_xa); 609 610 erdma_res_cb_free(dev); 611 612 return ret; 613 } 614 615 static void erdma_ib_device_remove(struct pci_dev *pdev) 616 { 617 struct erdma_dev *dev = pci_get_drvdata(pdev); 618 619 unregister_netdevice_notifier(&dev->netdev_nb); 620 ib_unregister_device(&dev->ibdev); 621 622 destroy_workqueue(dev->reflush_wq); 623 erdma_res_cb_free(dev); 624 xa_destroy(&dev->qp_xa); 625 xa_destroy(&dev->cq_xa); 626 } 627 628 static int erdma_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 629 { 630 int ret; 631 632 ret = erdma_probe_dev(pdev); 633 if (ret) 634 return ret; 635 636 ret = erdma_ib_device_add(pdev); 637 if (ret) { 638 erdma_remove_dev(pdev); 639 return ret; 640 } 641 642 return 0; 643 } 644 645 static void erdma_remove(struct pci_dev *pdev) 646 { 647 erdma_ib_device_remove(pdev); 648 erdma_remove_dev(pdev); 649 } 650 651 static struct pci_driver erdma_pci_driver = { 652 .name = DRV_MODULE_NAME, 653 .id_table = erdma_pci_tbl, 654 .probe = erdma_probe, 655 .remove = erdma_remove 656 }; 657 658 MODULE_DEVICE_TABLE(pci, erdma_pci_tbl); 659 660 static __init int erdma_init_module(void) 661 { 662 int ret; 663 664 ret = erdma_cm_init(); 665 if (ret) 666 return ret; 667 668 ret = pci_register_driver(&erdma_pci_driver); 669 if (ret) 670 erdma_cm_exit(); 671 672 return ret; 673 } 674 675 static void __exit erdma_exit_module(void) 676 { 677 pci_unregister_driver(&erdma_pci_driver); 678 679 erdma_cm_exit(); 680 } 681 682 module_init(erdma_init_module); 683 module_exit(erdma_exit_module); 684