1 /* 2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 * Author: Upinder Malhi <umalhi@cisco.com> 33 * Author: Anant Deepak <anadeepa@cisco.com> 34 * Author: Cesare Cantu' <cantuc@cisco.com> 35 * Author: Jeff Squyres <jsquyres@cisco.com> 36 * Author: Kiran Thirumalai <kithirum@cisco.com> 37 * Author: Xuyang Wang <xuywang@cisco.com> 38 * Author: Reese Faucette <rfaucett@cisco.com> 39 * 40 */ 41 42 #include <linux/module.h> 43 #include <linux/inetdevice.h> 44 #include <linux/init.h> 45 #include <linux/slab.h> 46 #include <linux/errno.h> 47 #include <linux/pci.h> 48 #include <linux/netdevice.h> 49 50 #include <rdma/ib_user_verbs.h> 51 #include <rdma/ib_addr.h> 52 53 #include "usnic_abi.h" 54 #include "usnic_common_util.h" 55 #include "usnic_ib.h" 56 #include "usnic_ib_qp_grp.h" 57 #include "usnic_log.h" 58 #include "usnic_fwd.h" 59 #include "usnic_debugfs.h" 60 #include "usnic_ib_verbs.h" 61 #include "usnic_transport.h" 62 #include "usnic_uiom.h" 63 #include "usnic_ib_sysfs.h" 64 65 unsigned int usnic_log_lvl = USNIC_LOG_LVL_ERR; 66 unsigned int usnic_ib_share_vf = 1; 67 68 static const char usnic_version[] = 69 DRV_NAME ": Cisco VIC (USNIC) Verbs Driver v" 70 DRV_VERSION " (" DRV_RELDATE ")\n"; 71 72 static DEFINE_MUTEX(usnic_ib_ibdev_list_lock); 73 static LIST_HEAD(usnic_ib_ibdev_list); 74 75 /* Callback dump funcs */ 76 static int usnic_ib_dump_vf_hdr(void *obj, char *buf, int buf_sz) 77 { 78 struct usnic_ib_vf *vf = obj; 79 return scnprintf(buf, buf_sz, "PF: %s ", dev_name(&vf->pf->ib_dev.dev)); 80 } 81 /* End callback dump funcs */ 82 83 static void usnic_ib_dump_vf(struct usnic_ib_vf *vf, char *buf, int buf_sz) 84 { 85 usnic_vnic_dump(vf->vnic, buf, buf_sz, vf, 86 usnic_ib_dump_vf_hdr, 87 usnic_ib_qp_grp_dump_hdr, usnic_ib_qp_grp_dump_rows); 88 } 89 90 void usnic_ib_log_vf(struct usnic_ib_vf *vf) 91 { 92 char *buf = kzalloc(1000, GFP_KERNEL); 93 94 if (!buf) 95 return; 96 97 usnic_ib_dump_vf(vf, buf, 1000); 98 usnic_dbg("%s\n", buf); 99 100 kfree(buf); 101 } 102 103 /* Start of netdev section */ 104 static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev) 105 { 106 struct usnic_ib_ucontext *ctx; 107 struct usnic_ib_qp_grp *qp_grp; 108 enum ib_qp_state cur_state; 109 int status; 110 111 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock)); 112 113 list_for_each_entry(ctx, &us_ibdev->ctx_list, link) { 114 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) { 115 cur_state = qp_grp->state; 116 if (cur_state == IB_QPS_INIT || 117 cur_state == IB_QPS_RTR || 118 cur_state == IB_QPS_RTS) { 119 status = usnic_ib_qp_grp_modify(qp_grp, 120 IB_QPS_ERR, 121 NULL); 122 if (status) { 123 usnic_err("Failed to transition qp grp %u from %s to %s\n", 124 qp_grp->grp_id, 125 usnic_ib_qp_grp_state_to_string 126 (cur_state), 127 usnic_ib_qp_grp_state_to_string 128 (IB_QPS_ERR)); 129 } 130 } 131 } 132 } 133 } 134 135 static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev, 136 unsigned long event) 137 { 138 struct net_device *netdev; 139 struct ib_event ib_event; 140 141 memset(&ib_event, 0, sizeof(ib_event)); 142 143 mutex_lock(&us_ibdev->usdev_lock); 144 netdev = us_ibdev->netdev; 145 switch (event) { 146 case NETDEV_REBOOT: 147 usnic_info("PF Reset on %s\n", dev_name(&us_ibdev->ib_dev.dev)); 148 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 149 ib_event.event = IB_EVENT_PORT_ERR; 150 ib_event.device = &us_ibdev->ib_dev; 151 ib_event.element.port_num = 1; 152 ib_dispatch_event(&ib_event); 153 break; 154 case NETDEV_CHANGEADDR: 155 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr, 156 sizeof(us_ibdev->ufdev->mac))) { 157 usnic_dbg("Ignoring addr change on %s\n", 158 dev_name(&us_ibdev->ib_dev.dev)); 159 } else { 160 usnic_info(" %s old mac: %pM new mac: %pM\n", 161 dev_name(&us_ibdev->ib_dev.dev), 162 us_ibdev->ufdev->mac, 163 netdev->dev_addr); 164 usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr); 165 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 166 ib_event.event = IB_EVENT_GID_CHANGE; 167 ib_event.device = &us_ibdev->ib_dev; 168 ib_event.element.port_num = 1; 169 ib_dispatch_event(&ib_event); 170 } 171 172 break; 173 case NETDEV_CHANGEMTU: 174 if (us_ibdev->ufdev->mtu != netdev->mtu) { 175 usnic_info("MTU Change on %s old: %u new: %u\n", 176 dev_name(&us_ibdev->ib_dev.dev), 177 us_ibdev->ufdev->mtu, netdev->mtu); 178 usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu); 179 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 180 } else { 181 usnic_dbg("Ignoring MTU change on %s\n", 182 dev_name(&us_ibdev->ib_dev.dev)); 183 } 184 break; 185 default: 186 usnic_dbg("Ignoring event %s on %s", 187 netdev_cmd_to_name(event), 188 dev_name(&us_ibdev->ib_dev.dev)); 189 } 190 mutex_unlock(&us_ibdev->usdev_lock); 191 } 192 193 static void usnic_ib_handle_port_event(struct ib_device *ibdev, 194 struct net_device *netdev, 195 unsigned long event) 196 { 197 struct usnic_ib_dev *us_ibdev = 198 container_of(ibdev, struct usnic_ib_dev, ib_dev); 199 struct ib_event ib_event; 200 201 mutex_lock(&us_ibdev->usdev_lock); 202 switch (event) { 203 case NETDEV_UP: 204 case NETDEV_DOWN: 205 case NETDEV_CHANGE: 206 if (!us_ibdev->ufdev->link_up && 207 netif_carrier_ok(netdev)) { 208 usnic_fwd_carrier_up(us_ibdev->ufdev); 209 usnic_info("Link UP on %s\n", 210 dev_name(&us_ibdev->ib_dev.dev)); 211 ib_event.event = IB_EVENT_PORT_ACTIVE; 212 ib_event.device = &us_ibdev->ib_dev; 213 ib_event.element.port_num = 1; 214 ib_dispatch_event(&ib_event); 215 } else if (us_ibdev->ufdev->link_up && 216 !netif_carrier_ok(netdev)) { 217 usnic_fwd_carrier_down(us_ibdev->ufdev); 218 usnic_info("Link DOWN on %s\n", 219 dev_name(&us_ibdev->ib_dev.dev)); 220 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 221 ib_event.event = IB_EVENT_PORT_ERR; 222 ib_event.device = &us_ibdev->ib_dev; 223 ib_event.element.port_num = 1; 224 ib_dispatch_event(&ib_event); 225 } else { 226 usnic_dbg("Ignoring %s on %s\n", 227 netdev_cmd_to_name(event), 228 dev_name(&us_ibdev->ib_dev.dev)); 229 } 230 break; 231 default: 232 break; 233 } 234 mutex_unlock(&us_ibdev->usdev_lock); 235 } 236 237 static int usnic_ib_netdevice_event(struct notifier_block *notifier, 238 unsigned long event, void *ptr) 239 { 240 struct usnic_ib_dev *us_ibdev; 241 struct ib_device *ibdev; 242 243 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 244 245 ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_USNIC); 246 if (!ibdev) 247 return NOTIFY_DONE; 248 249 us_ibdev = container_of(ibdev, struct usnic_ib_dev, ib_dev); 250 usnic_ib_handle_usdev_event(us_ibdev, event); 251 ib_device_put(ibdev); 252 return NOTIFY_DONE; 253 } 254 255 static struct notifier_block usnic_ib_netdevice_notifier = { 256 .notifier_call = usnic_ib_netdevice_event 257 }; 258 /* End of netdev section */ 259 260 /* Start of inet section */ 261 static int usnic_ib_handle_inet_event(struct usnic_ib_dev *us_ibdev, 262 unsigned long event, void *ptr) 263 { 264 struct in_ifaddr *ifa = ptr; 265 struct ib_event ib_event; 266 267 mutex_lock(&us_ibdev->usdev_lock); 268 269 switch (event) { 270 case NETDEV_DOWN: 271 usnic_info("%s via ip notifiers", 272 netdev_cmd_to_name(event)); 273 usnic_fwd_del_ipaddr(us_ibdev->ufdev); 274 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 275 ib_event.event = IB_EVENT_GID_CHANGE; 276 ib_event.device = &us_ibdev->ib_dev; 277 ib_event.element.port_num = 1; 278 ib_dispatch_event(&ib_event); 279 break; 280 case NETDEV_UP: 281 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address); 282 usnic_info("%s via ip notifiers: ip %pI4", 283 netdev_cmd_to_name(event), 284 &us_ibdev->ufdev->inaddr); 285 ib_event.event = IB_EVENT_GID_CHANGE; 286 ib_event.device = &us_ibdev->ib_dev; 287 ib_event.element.port_num = 1; 288 ib_dispatch_event(&ib_event); 289 break; 290 default: 291 usnic_info("Ignoring event %s on %s", 292 netdev_cmd_to_name(event), 293 dev_name(&us_ibdev->ib_dev.dev)); 294 } 295 mutex_unlock(&us_ibdev->usdev_lock); 296 297 return NOTIFY_DONE; 298 } 299 300 static int usnic_ib_inetaddr_event(struct notifier_block *notifier, 301 unsigned long event, void *ptr) 302 { 303 struct usnic_ib_dev *us_ibdev; 304 struct in_ifaddr *ifa = ptr; 305 struct net_device *netdev = ifa->ifa_dev->dev; 306 struct ib_device *ibdev; 307 308 ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_USNIC); 309 if (!ibdev) 310 return NOTIFY_DONE; 311 312 us_ibdev = container_of(ibdev, struct usnic_ib_dev, ib_dev); 313 usnic_ib_handle_inet_event(us_ibdev, event, ptr); 314 ib_device_put(ibdev); 315 return NOTIFY_DONE; 316 } 317 static struct notifier_block usnic_ib_inetaddr_notifier = { 318 .notifier_call = usnic_ib_inetaddr_event 319 }; 320 /* End of inet section*/ 321 322 static int usnic_port_immutable(struct ib_device *ibdev, u32 port_num, 323 struct ib_port_immutable *immutable) 324 { 325 struct ib_port_attr attr; 326 int err; 327 328 immutable->core_cap_flags = RDMA_CORE_PORT_USNIC; 329 330 err = ib_query_port(ibdev, port_num, &attr); 331 if (err) 332 return err; 333 334 immutable->gid_tbl_len = attr.gid_tbl_len; 335 336 return 0; 337 } 338 339 static void usnic_get_dev_fw_str(struct ib_device *device, char *str) 340 { 341 struct usnic_ib_dev *us_ibdev = 342 container_of(device, struct usnic_ib_dev, ib_dev); 343 struct ethtool_drvinfo info; 344 345 mutex_lock(&us_ibdev->usdev_lock); 346 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info); 347 mutex_unlock(&us_ibdev->usdev_lock); 348 349 snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", info.fw_version); 350 } 351 352 static const struct ib_device_ops usnic_dev_ops = { 353 .owner = THIS_MODULE, 354 .driver_id = RDMA_DRIVER_USNIC, 355 .uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION, 356 357 .alloc_pd = usnic_ib_alloc_pd, 358 .alloc_ucontext = usnic_ib_alloc_ucontext, 359 .create_cq = usnic_ib_create_cq, 360 .create_qp = usnic_ib_create_qp, 361 .dealloc_pd = usnic_ib_dealloc_pd, 362 .dealloc_ucontext = usnic_ib_dealloc_ucontext, 363 .dereg_mr = usnic_ib_dereg_mr, 364 .destroy_cq = usnic_ib_destroy_cq, 365 .destroy_qp = usnic_ib_destroy_qp, 366 .device_group = &usnic_attr_group, 367 .get_dev_fw_str = usnic_get_dev_fw_str, 368 .get_link_layer = usnic_ib_port_link_layer, 369 .get_port_immutable = usnic_port_immutable, 370 .mmap = usnic_ib_mmap, 371 .modify_qp = usnic_ib_modify_qp, 372 .query_device = usnic_ib_query_device, 373 .query_gid = usnic_ib_query_gid, 374 .query_port = usnic_ib_query_port, 375 .query_qp = usnic_ib_query_qp, 376 .reg_user_mr = usnic_ib_reg_mr, 377 .report_port_event = usnic_ib_handle_port_event, 378 INIT_RDMA_OBJ_SIZE(ib_pd, usnic_ib_pd, ibpd), 379 INIT_RDMA_OBJ_SIZE(ib_cq, usnic_ib_cq, ibcq), 380 INIT_RDMA_OBJ_SIZE(ib_qp, usnic_ib_qp_grp, ibqp), 381 INIT_RDMA_OBJ_SIZE(ib_ucontext, usnic_ib_ucontext, ibucontext), 382 }; 383 384 /* Start of PF discovery section */ 385 static void *usnic_ib_device_add(struct pci_dev *dev) 386 { 387 struct usnic_ib_dev *us_ibdev; 388 union ib_gid gid; 389 struct in_device *ind; 390 struct net_device *netdev; 391 int ret; 392 393 usnic_dbg("\n"); 394 netdev = pci_get_drvdata(dev); 395 396 us_ibdev = ib_alloc_device(usnic_ib_dev, ib_dev); 397 if (!us_ibdev) { 398 usnic_err("Device %s context alloc failed\n", 399 netdev_name(pci_get_drvdata(dev))); 400 return NULL; 401 } 402 403 us_ibdev->ufdev = usnic_fwd_dev_alloc(dev); 404 if (!us_ibdev->ufdev) { 405 usnic_err("Failed to alloc ufdev for %s\n", pci_name(dev)); 406 goto err_dealloc; 407 } 408 409 mutex_init(&us_ibdev->usdev_lock); 410 INIT_LIST_HEAD(&us_ibdev->vf_dev_list); 411 INIT_LIST_HEAD(&us_ibdev->ctx_list); 412 413 us_ibdev->pdev = dev; 414 us_ibdev->netdev = pci_get_drvdata(dev); 415 us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP; 416 us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT; 417 us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS; 418 us_ibdev->ib_dev.dev.parent = &dev->dev; 419 420 ib_set_device_ops(&us_ibdev->ib_dev, &usnic_dev_ops); 421 422 ret = ib_device_set_netdev(&us_ibdev->ib_dev, us_ibdev->netdev, 1); 423 if (ret) 424 goto err_fwd_dealloc; 425 426 dma_set_max_seg_size(&dev->dev, SZ_2G); 427 if (ib_register_device(&us_ibdev->ib_dev, "usnic_%d", &dev->dev)) 428 goto err_fwd_dealloc; 429 430 usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu); 431 usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr); 432 if (netif_carrier_ok(us_ibdev->netdev)) 433 usnic_fwd_carrier_up(us_ibdev->ufdev); 434 435 rcu_read_lock(); 436 ind = __in_dev_get_rcu(netdev); 437 if (ind) { 438 const struct in_ifaddr *ifa; 439 440 ifa = rcu_dereference(ind->ifa_list); 441 if (ifa) 442 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address); 443 } 444 rcu_read_unlock(); 445 446 usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr, 447 us_ibdev->ufdev->inaddr, &gid.raw[0]); 448 memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id, 449 sizeof(gid.global.interface_id)); 450 kref_init(&us_ibdev->vf_cnt); 451 452 usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n", 453 dev_name(&us_ibdev->ib_dev.dev), 454 netdev_name(us_ibdev->netdev), us_ibdev->ufdev->mac, 455 us_ibdev->ufdev->link_up, us_ibdev->ufdev->mtu); 456 return us_ibdev; 457 458 err_fwd_dealloc: 459 usnic_fwd_dev_free(us_ibdev->ufdev); 460 err_dealloc: 461 usnic_err("failed -- deallocing device\n"); 462 ib_dealloc_device(&us_ibdev->ib_dev); 463 return NULL; 464 } 465 466 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev) 467 { 468 usnic_info("Unregistering %s\n", dev_name(&us_ibdev->ib_dev.dev)); 469 usnic_ib_sysfs_unregister_usdev(us_ibdev); 470 usnic_fwd_dev_free(us_ibdev->ufdev); 471 ib_unregister_device(&us_ibdev->ib_dev); 472 ib_dealloc_device(&us_ibdev->ib_dev); 473 } 474 475 static void usnic_ib_undiscover_pf(struct kref *kref) 476 { 477 struct usnic_ib_dev *us_ibdev, *tmp; 478 struct pci_dev *dev; 479 bool found = false; 480 481 dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev; 482 mutex_lock(&usnic_ib_ibdev_list_lock); 483 list_for_each_entry_safe(us_ibdev, tmp, 484 &usnic_ib_ibdev_list, ib_dev_link) { 485 if (us_ibdev->pdev == dev) { 486 list_del(&us_ibdev->ib_dev_link); 487 found = true; 488 break; 489 } 490 } 491 492 493 mutex_unlock(&usnic_ib_ibdev_list_lock); 494 if (found) 495 usnic_ib_device_remove(us_ibdev); 496 else 497 WARN(1, "Failed to remove PF %s\n", pci_name(dev)); 498 } 499 500 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic) 501 { 502 struct usnic_ib_dev *us_ibdev; 503 struct pci_dev *parent_pci, *vf_pci; 504 int err; 505 506 vf_pci = usnic_vnic_get_pdev(vnic); 507 parent_pci = pci_physfn(vf_pci); 508 509 BUG_ON(!parent_pci); 510 511 mutex_lock(&usnic_ib_ibdev_list_lock); 512 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 513 if (us_ibdev->pdev == parent_pci) { 514 kref_get(&us_ibdev->vf_cnt); 515 goto out; 516 } 517 } 518 519 us_ibdev = usnic_ib_device_add(parent_pci); 520 if (!us_ibdev) { 521 us_ibdev = ERR_PTR(-EFAULT); 522 goto out; 523 } 524 525 err = usnic_ib_sysfs_register_usdev(us_ibdev); 526 if (err) { 527 usnic_ib_device_remove(us_ibdev); 528 us_ibdev = ERR_PTR(err); 529 goto out; 530 } 531 532 list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list); 533 out: 534 mutex_unlock(&usnic_ib_ibdev_list_lock); 535 return us_ibdev; 536 } 537 /* End of PF discovery section */ 538 539 /* Start of PCI section */ 540 541 static const struct pci_device_id usnic_ib_pci_ids[] = { 542 {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)}, 543 {0,} 544 }; 545 546 static int usnic_ib_pci_probe(struct pci_dev *pdev, 547 const struct pci_device_id *id) 548 { 549 int err; 550 struct usnic_ib_dev *pf; 551 struct usnic_ib_vf *vf; 552 enum usnic_vnic_res_type res_type; 553 554 if (!device_iommu_mapped(&pdev->dev)) { 555 usnic_err("IOMMU required but not present or enabled. USNIC QPs will not function w/o enabling IOMMU\n"); 556 return -EPERM; 557 } 558 559 vf = kzalloc(sizeof(*vf), GFP_KERNEL); 560 if (!vf) 561 return -ENOMEM; 562 563 err = pci_enable_device(pdev); 564 if (err) { 565 usnic_err("Failed to enable %s with err %d\n", 566 pci_name(pdev), err); 567 goto out_clean_vf; 568 } 569 570 err = pci_request_regions(pdev, DRV_NAME); 571 if (err) { 572 usnic_err("Failed to request region for %s with err %d\n", 573 pci_name(pdev), err); 574 goto out_disable_device; 575 } 576 577 pci_set_master(pdev); 578 pci_set_drvdata(pdev, vf); 579 580 vf->vnic = usnic_vnic_alloc(pdev); 581 if (IS_ERR_OR_NULL(vf->vnic)) { 582 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM; 583 usnic_err("Failed to alloc vnic for %s with err %d\n", 584 pci_name(pdev), err); 585 goto out_release_regions; 586 } 587 588 pf = usnic_ib_discover_pf(vf->vnic); 589 if (IS_ERR(pf)) { 590 err = PTR_ERR(pf); 591 usnic_err("Failed to discover pf of vnic %s with err%d\n", 592 pci_name(pdev), err); 593 goto out_clean_vnic; 594 } 595 596 vf->pf = pf; 597 mutex_init(&vf->lock); 598 mutex_lock(&pf->usdev_lock); 599 list_add_tail(&vf->link, &pf->vf_dev_list); 600 /* 601 * Save max settings (will be same for each VF, easier to re-write than 602 * to say "if (!set) { set_values(); set=1; } 603 */ 604 for (res_type = USNIC_VNIC_RES_TYPE_EOL+1; 605 res_type < USNIC_VNIC_RES_TYPE_MAX; 606 res_type++) { 607 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic, 608 res_type); 609 } 610 611 mutex_unlock(&pf->usdev_lock); 612 613 usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev), 614 dev_name(&pf->ib_dev.dev)); 615 usnic_ib_log_vf(vf); 616 return 0; 617 618 out_clean_vnic: 619 usnic_vnic_free(vf->vnic); 620 out_release_regions: 621 pci_set_drvdata(pdev, NULL); 622 pci_release_regions(pdev); 623 out_disable_device: 624 pci_disable_device(pdev); 625 out_clean_vf: 626 kfree(vf); 627 return err; 628 } 629 630 static void usnic_ib_pci_remove(struct pci_dev *pdev) 631 { 632 struct usnic_ib_vf *vf = pci_get_drvdata(pdev); 633 struct usnic_ib_dev *pf = vf->pf; 634 635 mutex_lock(&pf->usdev_lock); 636 list_del(&vf->link); 637 mutex_unlock(&pf->usdev_lock); 638 639 kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf); 640 usnic_vnic_free(vf->vnic); 641 pci_set_drvdata(pdev, NULL); 642 pci_release_regions(pdev); 643 pci_disable_device(pdev); 644 kfree(vf); 645 646 usnic_info("Removed VF %s\n", pci_name(pdev)); 647 } 648 649 /* PCI driver entry points */ 650 static struct pci_driver usnic_ib_pci_driver = { 651 .name = DRV_NAME, 652 .id_table = usnic_ib_pci_ids, 653 .probe = usnic_ib_pci_probe, 654 .remove = usnic_ib_pci_remove, 655 }; 656 /* End of PCI section */ 657 658 /* Start of module section */ 659 static int __init usnic_ib_init(void) 660 { 661 int err; 662 663 printk_once(KERN_INFO "%s", usnic_version); 664 665 err = pci_register_driver(&usnic_ib_pci_driver); 666 if (err) { 667 usnic_err("Unable to register with PCI\n"); 668 goto out_umem_fini; 669 } 670 671 err = register_netdevice_notifier(&usnic_ib_netdevice_notifier); 672 if (err) { 673 usnic_err("Failed to register netdev notifier\n"); 674 goto out_pci_unreg; 675 } 676 677 err = register_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 678 if (err) { 679 usnic_err("Failed to register inet addr notifier\n"); 680 goto out_unreg_netdev_notifier; 681 } 682 683 err = usnic_transport_init(); 684 if (err) { 685 usnic_err("Failed to initialize transport\n"); 686 goto out_unreg_inetaddr_notifier; 687 } 688 689 usnic_debugfs_init(); 690 691 return 0; 692 693 out_unreg_inetaddr_notifier: 694 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 695 out_unreg_netdev_notifier: 696 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 697 out_pci_unreg: 698 pci_unregister_driver(&usnic_ib_pci_driver); 699 out_umem_fini: 700 701 return err; 702 } 703 704 static void __exit usnic_ib_destroy(void) 705 { 706 usnic_dbg("\n"); 707 usnic_debugfs_exit(); 708 usnic_transport_fini(); 709 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 710 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 711 pci_unregister_driver(&usnic_ib_pci_driver); 712 } 713 714 MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver"); 715 MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>"); 716 MODULE_LICENSE("Dual BSD/GPL"); 717 module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR); 718 module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR); 719 MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3"); 720 MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs"); 721 MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids); 722 723 module_init(usnic_ib_init); 724 module_exit(usnic_ib_destroy); 725 /* End of module section */ 726