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[1000]; 93 usnic_ib_dump_vf(vf, buf, sizeof(buf)); 94 usnic_dbg("%s\n", buf); 95 } 96 97 /* Start of netdev section */ 98 static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev) 99 { 100 struct usnic_ib_ucontext *ctx; 101 struct usnic_ib_qp_grp *qp_grp; 102 enum ib_qp_state cur_state; 103 int status; 104 105 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock)); 106 107 list_for_each_entry(ctx, &us_ibdev->ctx_list, link) { 108 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) { 109 cur_state = qp_grp->state; 110 if (cur_state == IB_QPS_INIT || 111 cur_state == IB_QPS_RTR || 112 cur_state == IB_QPS_RTS) { 113 status = usnic_ib_qp_grp_modify(qp_grp, 114 IB_QPS_ERR, 115 NULL); 116 if (status) { 117 usnic_err("Failed to transistion qp grp %u from %s to %s\n", 118 qp_grp->grp_id, 119 usnic_ib_qp_grp_state_to_string 120 (cur_state), 121 usnic_ib_qp_grp_state_to_string 122 (IB_QPS_ERR)); 123 } 124 } 125 } 126 } 127 } 128 129 static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev, 130 unsigned long event) 131 { 132 struct net_device *netdev; 133 struct ib_event ib_event; 134 135 memset(&ib_event, 0, sizeof(ib_event)); 136 137 mutex_lock(&us_ibdev->usdev_lock); 138 netdev = us_ibdev->netdev; 139 switch (event) { 140 case NETDEV_REBOOT: 141 usnic_info("PF Reset on %s\n", dev_name(&us_ibdev->ib_dev.dev)); 142 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 143 ib_event.event = IB_EVENT_PORT_ERR; 144 ib_event.device = &us_ibdev->ib_dev; 145 ib_event.element.port_num = 1; 146 ib_dispatch_event(&ib_event); 147 break; 148 case NETDEV_UP: 149 case NETDEV_DOWN: 150 case NETDEV_CHANGE: 151 if (!us_ibdev->ufdev->link_up && 152 netif_carrier_ok(netdev)) { 153 usnic_fwd_carrier_up(us_ibdev->ufdev); 154 usnic_info("Link UP on %s\n", 155 dev_name(&us_ibdev->ib_dev.dev)); 156 ib_event.event = IB_EVENT_PORT_ACTIVE; 157 ib_event.device = &us_ibdev->ib_dev; 158 ib_event.element.port_num = 1; 159 ib_dispatch_event(&ib_event); 160 } else if (us_ibdev->ufdev->link_up && 161 !netif_carrier_ok(netdev)) { 162 usnic_fwd_carrier_down(us_ibdev->ufdev); 163 usnic_info("Link DOWN on %s\n", 164 dev_name(&us_ibdev->ib_dev.dev)); 165 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 166 ib_event.event = IB_EVENT_PORT_ERR; 167 ib_event.device = &us_ibdev->ib_dev; 168 ib_event.element.port_num = 1; 169 ib_dispatch_event(&ib_event); 170 } else { 171 usnic_dbg("Ignoring %s on %s\n", 172 netdev_cmd_to_name(event), 173 dev_name(&us_ibdev->ib_dev.dev)); 174 } 175 break; 176 case NETDEV_CHANGEADDR: 177 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr, 178 sizeof(us_ibdev->ufdev->mac))) { 179 usnic_dbg("Ignoring addr change on %s\n", 180 dev_name(&us_ibdev->ib_dev.dev)); 181 } else { 182 usnic_info(" %s old mac: %pM new mac: %pM\n", 183 dev_name(&us_ibdev->ib_dev.dev), 184 us_ibdev->ufdev->mac, 185 netdev->dev_addr); 186 usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr); 187 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 188 ib_event.event = IB_EVENT_GID_CHANGE; 189 ib_event.device = &us_ibdev->ib_dev; 190 ib_event.element.port_num = 1; 191 ib_dispatch_event(&ib_event); 192 } 193 194 break; 195 case NETDEV_CHANGEMTU: 196 if (us_ibdev->ufdev->mtu != netdev->mtu) { 197 usnic_info("MTU Change on %s old: %u new: %u\n", 198 dev_name(&us_ibdev->ib_dev.dev), 199 us_ibdev->ufdev->mtu, netdev->mtu); 200 usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu); 201 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 202 } else { 203 usnic_dbg("Ignoring MTU change on %s\n", 204 dev_name(&us_ibdev->ib_dev.dev)); 205 } 206 break; 207 default: 208 usnic_dbg("Ignoring event %s on %s", 209 netdev_cmd_to_name(event), 210 dev_name(&us_ibdev->ib_dev.dev)); 211 } 212 mutex_unlock(&us_ibdev->usdev_lock); 213 } 214 215 static int usnic_ib_netdevice_event(struct notifier_block *notifier, 216 unsigned long event, void *ptr) 217 { 218 struct usnic_ib_dev *us_ibdev; 219 struct ib_device *ibdev; 220 221 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 222 223 ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_USNIC); 224 if (!ibdev) 225 return NOTIFY_DONE; 226 227 us_ibdev = container_of(ibdev, struct usnic_ib_dev, ib_dev); 228 usnic_ib_handle_usdev_event(us_ibdev, event); 229 ib_device_put(ibdev); 230 return NOTIFY_DONE; 231 } 232 233 static struct notifier_block usnic_ib_netdevice_notifier = { 234 .notifier_call = usnic_ib_netdevice_event 235 }; 236 /* End of netdev section */ 237 238 /* Start of inet section */ 239 static int usnic_ib_handle_inet_event(struct usnic_ib_dev *us_ibdev, 240 unsigned long event, void *ptr) 241 { 242 struct in_ifaddr *ifa = ptr; 243 struct ib_event ib_event; 244 245 mutex_lock(&us_ibdev->usdev_lock); 246 247 switch (event) { 248 case NETDEV_DOWN: 249 usnic_info("%s via ip notifiers", 250 netdev_cmd_to_name(event)); 251 usnic_fwd_del_ipaddr(us_ibdev->ufdev); 252 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 253 ib_event.event = IB_EVENT_GID_CHANGE; 254 ib_event.device = &us_ibdev->ib_dev; 255 ib_event.element.port_num = 1; 256 ib_dispatch_event(&ib_event); 257 break; 258 case NETDEV_UP: 259 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address); 260 usnic_info("%s via ip notifiers: ip %pI4", 261 netdev_cmd_to_name(event), 262 &us_ibdev->ufdev->inaddr); 263 ib_event.event = IB_EVENT_GID_CHANGE; 264 ib_event.device = &us_ibdev->ib_dev; 265 ib_event.element.port_num = 1; 266 ib_dispatch_event(&ib_event); 267 break; 268 default: 269 usnic_info("Ignoring event %s on %s", 270 netdev_cmd_to_name(event), 271 dev_name(&us_ibdev->ib_dev.dev)); 272 } 273 mutex_unlock(&us_ibdev->usdev_lock); 274 275 return NOTIFY_DONE; 276 } 277 278 static int usnic_ib_inetaddr_event(struct notifier_block *notifier, 279 unsigned long event, void *ptr) 280 { 281 struct usnic_ib_dev *us_ibdev; 282 struct in_ifaddr *ifa = ptr; 283 struct net_device *netdev = ifa->ifa_dev->dev; 284 struct ib_device *ibdev; 285 286 ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_USNIC); 287 if (!ibdev) 288 return NOTIFY_DONE; 289 290 us_ibdev = container_of(ibdev, struct usnic_ib_dev, ib_dev); 291 usnic_ib_handle_inet_event(us_ibdev, event, ptr); 292 ib_device_put(ibdev); 293 return NOTIFY_DONE; 294 } 295 static struct notifier_block usnic_ib_inetaddr_notifier = { 296 .notifier_call = usnic_ib_inetaddr_event 297 }; 298 /* End of inet section*/ 299 300 static int usnic_port_immutable(struct ib_device *ibdev, u8 port_num, 301 struct ib_port_immutable *immutable) 302 { 303 struct ib_port_attr attr; 304 int err; 305 306 immutable->core_cap_flags = RDMA_CORE_PORT_USNIC; 307 308 err = ib_query_port(ibdev, port_num, &attr); 309 if (err) 310 return err; 311 312 immutable->pkey_tbl_len = attr.pkey_tbl_len; 313 immutable->gid_tbl_len = attr.gid_tbl_len; 314 315 return 0; 316 } 317 318 static void usnic_get_dev_fw_str(struct ib_device *device, char *str) 319 { 320 struct usnic_ib_dev *us_ibdev = 321 container_of(device, struct usnic_ib_dev, ib_dev); 322 struct ethtool_drvinfo info; 323 324 mutex_lock(&us_ibdev->usdev_lock); 325 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info); 326 mutex_unlock(&us_ibdev->usdev_lock); 327 328 snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", info.fw_version); 329 } 330 331 static const struct ib_device_ops usnic_dev_ops = { 332 .owner = THIS_MODULE, 333 .driver_id = RDMA_DRIVER_USNIC, 334 .uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION, 335 336 .alloc_pd = usnic_ib_alloc_pd, 337 .alloc_ucontext = usnic_ib_alloc_ucontext, 338 .create_cq = usnic_ib_create_cq, 339 .create_qp = usnic_ib_create_qp, 340 .dealloc_pd = usnic_ib_dealloc_pd, 341 .dealloc_ucontext = usnic_ib_dealloc_ucontext, 342 .dereg_mr = usnic_ib_dereg_mr, 343 .destroy_cq = usnic_ib_destroy_cq, 344 .destroy_qp = usnic_ib_destroy_qp, 345 .get_dev_fw_str = usnic_get_dev_fw_str, 346 .get_link_layer = usnic_ib_port_link_layer, 347 .get_port_immutable = usnic_port_immutable, 348 .mmap = usnic_ib_mmap, 349 .modify_qp = usnic_ib_modify_qp, 350 .query_device = usnic_ib_query_device, 351 .query_gid = usnic_ib_query_gid, 352 .query_pkey = usnic_ib_query_pkey, 353 .query_port = usnic_ib_query_port, 354 .query_qp = usnic_ib_query_qp, 355 .reg_user_mr = usnic_ib_reg_mr, 356 INIT_RDMA_OBJ_SIZE(ib_pd, usnic_ib_pd, ibpd), 357 INIT_RDMA_OBJ_SIZE(ib_cq, usnic_ib_cq, ibcq), 358 INIT_RDMA_OBJ_SIZE(ib_ucontext, usnic_ib_ucontext, ibucontext), 359 }; 360 361 /* Start of PF discovery section */ 362 static void *usnic_ib_device_add(struct pci_dev *dev) 363 { 364 struct usnic_ib_dev *us_ibdev; 365 union ib_gid gid; 366 struct in_device *ind; 367 struct net_device *netdev; 368 int ret; 369 370 usnic_dbg("\n"); 371 netdev = pci_get_drvdata(dev); 372 373 us_ibdev = ib_alloc_device(usnic_ib_dev, ib_dev); 374 if (!us_ibdev) { 375 usnic_err("Device %s context alloc failed\n", 376 netdev_name(pci_get_drvdata(dev))); 377 return ERR_PTR(-EFAULT); 378 } 379 380 us_ibdev->ufdev = usnic_fwd_dev_alloc(dev); 381 if (!us_ibdev->ufdev) { 382 usnic_err("Failed to alloc ufdev for %s\n", pci_name(dev)); 383 goto err_dealloc; 384 } 385 386 mutex_init(&us_ibdev->usdev_lock); 387 INIT_LIST_HEAD(&us_ibdev->vf_dev_list); 388 INIT_LIST_HEAD(&us_ibdev->ctx_list); 389 390 us_ibdev->pdev = dev; 391 us_ibdev->netdev = pci_get_drvdata(dev); 392 us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP; 393 us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT; 394 us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS; 395 us_ibdev->ib_dev.dev.parent = &dev->dev; 396 397 us_ibdev->ib_dev.uverbs_cmd_mask = 398 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 399 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 400 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 401 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 402 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 403 (1ull << IB_USER_VERBS_CMD_REG_MR) | 404 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 405 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 406 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 407 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 408 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 409 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 410 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 411 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 412 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | 413 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | 414 (1ull << IB_USER_VERBS_CMD_OPEN_QP); 415 416 ib_set_device_ops(&us_ibdev->ib_dev, &usnic_dev_ops); 417 418 rdma_set_device_sysfs_group(&us_ibdev->ib_dev, &usnic_attr_group); 419 420 ret = ib_device_set_netdev(&us_ibdev->ib_dev, us_ibdev->netdev, 1); 421 if (ret) 422 goto err_fwd_dealloc; 423 424 if (ib_register_device(&us_ibdev->ib_dev, "usnic_%d")) 425 goto err_fwd_dealloc; 426 427 usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu); 428 usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr); 429 if (netif_carrier_ok(us_ibdev->netdev)) 430 usnic_fwd_carrier_up(us_ibdev->ufdev); 431 432 rcu_read_lock(); 433 ind = __in_dev_get_rcu(netdev); 434 if (ind) { 435 const struct in_ifaddr *ifa; 436 437 ifa = rcu_dereference(ind->ifa_list); 438 if (ifa) 439 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address); 440 } 441 rcu_read_unlock(); 442 443 usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr, 444 us_ibdev->ufdev->inaddr, &gid.raw[0]); 445 memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id, 446 sizeof(gid.global.interface_id)); 447 kref_init(&us_ibdev->vf_cnt); 448 449 usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n", 450 dev_name(&us_ibdev->ib_dev.dev), 451 netdev_name(us_ibdev->netdev), us_ibdev->ufdev->mac, 452 us_ibdev->ufdev->link_up, us_ibdev->ufdev->mtu); 453 return us_ibdev; 454 455 err_fwd_dealloc: 456 usnic_fwd_dev_free(us_ibdev->ufdev); 457 err_dealloc: 458 usnic_err("failed -- deallocing device\n"); 459 ib_dealloc_device(&us_ibdev->ib_dev); 460 return NULL; 461 } 462 463 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev) 464 { 465 usnic_info("Unregistering %s\n", dev_name(&us_ibdev->ib_dev.dev)); 466 usnic_ib_sysfs_unregister_usdev(us_ibdev); 467 usnic_fwd_dev_free(us_ibdev->ufdev); 468 ib_unregister_device(&us_ibdev->ib_dev); 469 ib_dealloc_device(&us_ibdev->ib_dev); 470 } 471 472 static void usnic_ib_undiscover_pf(struct kref *kref) 473 { 474 struct usnic_ib_dev *us_ibdev, *tmp; 475 struct pci_dev *dev; 476 bool found = false; 477 478 dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev; 479 mutex_lock(&usnic_ib_ibdev_list_lock); 480 list_for_each_entry_safe(us_ibdev, tmp, 481 &usnic_ib_ibdev_list, ib_dev_link) { 482 if (us_ibdev->pdev == dev) { 483 list_del(&us_ibdev->ib_dev_link); 484 found = true; 485 break; 486 } 487 } 488 489 490 mutex_unlock(&usnic_ib_ibdev_list_lock); 491 if (found) 492 usnic_ib_device_remove(us_ibdev); 493 else 494 WARN(1, "Failed to remove PF %s\n", pci_name(dev)); 495 } 496 497 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic) 498 { 499 struct usnic_ib_dev *us_ibdev; 500 struct pci_dev *parent_pci, *vf_pci; 501 int err; 502 503 vf_pci = usnic_vnic_get_pdev(vnic); 504 parent_pci = pci_physfn(vf_pci); 505 506 BUG_ON(!parent_pci); 507 508 mutex_lock(&usnic_ib_ibdev_list_lock); 509 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 510 if (us_ibdev->pdev == parent_pci) { 511 kref_get(&us_ibdev->vf_cnt); 512 goto out; 513 } 514 } 515 516 us_ibdev = usnic_ib_device_add(parent_pci); 517 if (IS_ERR_OR_NULL(us_ibdev)) { 518 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT); 519 goto out; 520 } 521 522 err = usnic_ib_sysfs_register_usdev(us_ibdev); 523 if (err) { 524 usnic_ib_device_remove(us_ibdev); 525 us_ibdev = ERR_PTR(err); 526 goto out; 527 } 528 529 list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list); 530 out: 531 mutex_unlock(&usnic_ib_ibdev_list_lock); 532 return us_ibdev; 533 } 534 /* End of PF discovery section */ 535 536 /* Start of PCI section */ 537 538 static const struct pci_device_id usnic_ib_pci_ids[] = { 539 {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)}, 540 {0,} 541 }; 542 543 static int usnic_ib_pci_probe(struct pci_dev *pdev, 544 const struct pci_device_id *id) 545 { 546 int err; 547 struct usnic_ib_dev *pf; 548 struct usnic_ib_vf *vf; 549 enum usnic_vnic_res_type res_type; 550 551 vf = kzalloc(sizeof(*vf), GFP_KERNEL); 552 if (!vf) 553 return -ENOMEM; 554 555 err = pci_enable_device(pdev); 556 if (err) { 557 usnic_err("Failed to enable %s with err %d\n", 558 pci_name(pdev), err); 559 goto out_clean_vf; 560 } 561 562 err = pci_request_regions(pdev, DRV_NAME); 563 if (err) { 564 usnic_err("Failed to request region for %s with err %d\n", 565 pci_name(pdev), err); 566 goto out_disable_device; 567 } 568 569 pci_set_master(pdev); 570 pci_set_drvdata(pdev, vf); 571 572 vf->vnic = usnic_vnic_alloc(pdev); 573 if (IS_ERR_OR_NULL(vf->vnic)) { 574 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM; 575 usnic_err("Failed to alloc vnic for %s with err %d\n", 576 pci_name(pdev), err); 577 goto out_release_regions; 578 } 579 580 pf = usnic_ib_discover_pf(vf->vnic); 581 if (IS_ERR_OR_NULL(pf)) { 582 usnic_err("Failed to discover pf of vnic %s with err%ld\n", 583 pci_name(pdev), PTR_ERR(pf)); 584 err = pf ? PTR_ERR(pf) : -EFAULT; 585 goto out_clean_vnic; 586 } 587 588 vf->pf = pf; 589 spin_lock_init(&vf->lock); 590 mutex_lock(&pf->usdev_lock); 591 list_add_tail(&vf->link, &pf->vf_dev_list); 592 /* 593 * Save max settings (will be same for each VF, easier to re-write than 594 * to say "if (!set) { set_values(); set=1; } 595 */ 596 for (res_type = USNIC_VNIC_RES_TYPE_EOL+1; 597 res_type < USNIC_VNIC_RES_TYPE_MAX; 598 res_type++) { 599 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic, 600 res_type); 601 } 602 603 mutex_unlock(&pf->usdev_lock); 604 605 usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev), 606 dev_name(&pf->ib_dev.dev)); 607 usnic_ib_log_vf(vf); 608 return 0; 609 610 out_clean_vnic: 611 usnic_vnic_free(vf->vnic); 612 out_release_regions: 613 pci_set_drvdata(pdev, NULL); 614 pci_clear_master(pdev); 615 pci_release_regions(pdev); 616 out_disable_device: 617 pci_disable_device(pdev); 618 out_clean_vf: 619 kfree(vf); 620 return err; 621 } 622 623 static void usnic_ib_pci_remove(struct pci_dev *pdev) 624 { 625 struct usnic_ib_vf *vf = pci_get_drvdata(pdev); 626 struct usnic_ib_dev *pf = vf->pf; 627 628 mutex_lock(&pf->usdev_lock); 629 list_del(&vf->link); 630 mutex_unlock(&pf->usdev_lock); 631 632 kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf); 633 usnic_vnic_free(vf->vnic); 634 pci_set_drvdata(pdev, NULL); 635 pci_clear_master(pdev); 636 pci_release_regions(pdev); 637 pci_disable_device(pdev); 638 kfree(vf); 639 640 usnic_info("Removed VF %s\n", pci_name(pdev)); 641 } 642 643 /* PCI driver entry points */ 644 static struct pci_driver usnic_ib_pci_driver = { 645 .name = DRV_NAME, 646 .id_table = usnic_ib_pci_ids, 647 .probe = usnic_ib_pci_probe, 648 .remove = usnic_ib_pci_remove, 649 }; 650 /* End of PCI section */ 651 652 /* Start of module section */ 653 static int __init usnic_ib_init(void) 654 { 655 int err; 656 657 printk_once(KERN_INFO "%s", usnic_version); 658 659 err = usnic_uiom_init(DRV_NAME); 660 if (err) { 661 usnic_err("Unable to initialize umem with err %d\n", err); 662 return err; 663 } 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