1/* 2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved. 3 * 4 * This program is free software; you may redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; version 2 of the License. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 15 * SOFTWARE. 16 * 17 * Author: Upinder Malhi <umalhi@cisco.com> 18 * Author: Anant Deepak <anadeepa@cisco.com> 19 * Author: Cesare Cantu' <cantuc@cisco.com> 20 * Author: Jeff Squyres <jsquyres@cisco.com> 21 * Author: Kiran Thirumalai <kithirum@cisco.com> 22 * Author: Xuyang Wang <xuywang@cisco.com> 23 * Author: Reese Faucette <rfaucett@cisco.com> 24 * 25 */ 26 27#include <linux/module.h> 28#include <linux/inetdevice.h> 29#include <linux/init.h> 30#include <linux/slab.h> 31#include <linux/errno.h> 32#include <linux/pci.h> 33#include <linux/netdevice.h> 34 35#include <rdma/ib_user_verbs.h> 36#include <rdma/ib_addr.h> 37 38#include "usnic_abi.h" 39#include "usnic_common_util.h" 40#include "usnic_ib.h" 41#include "usnic_ib_qp_grp.h" 42#include "usnic_log.h" 43#include "usnic_fwd.h" 44#include "usnic_debugfs.h" 45#include "usnic_ib_verbs.h" 46#include "usnic_transport.h" 47#include "usnic_uiom.h" 48#include "usnic_ib_sysfs.h" 49 50unsigned int usnic_log_lvl = USNIC_LOG_LVL_ERR; 51unsigned int usnic_ib_share_vf = 1; 52 53static const char usnic_version[] = 54 DRV_NAME ": Cisco VIC (USNIC) Verbs Driver v" 55 DRV_VERSION " (" DRV_RELDATE ")\n"; 56 57static DEFINE_MUTEX(usnic_ib_ibdev_list_lock); 58static LIST_HEAD(usnic_ib_ibdev_list); 59 60/* Callback dump funcs */ 61static int usnic_ib_dump_vf_hdr(void *obj, char *buf, int buf_sz) 62{ 63 struct usnic_ib_vf *vf = obj; 64 return scnprintf(buf, buf_sz, "PF: %s ", vf->pf->ib_dev.name); 65} 66/* End callback dump funcs */ 67 68static void usnic_ib_dump_vf(struct usnic_ib_vf *vf, char *buf, int buf_sz) 69{ 70 usnic_vnic_dump(vf->vnic, buf, buf_sz, vf, 71 usnic_ib_dump_vf_hdr, 72 usnic_ib_qp_grp_dump_hdr, usnic_ib_qp_grp_dump_rows); 73} 74 75void usnic_ib_log_vf(struct usnic_ib_vf *vf) 76{ 77 char buf[1000]; 78 usnic_ib_dump_vf(vf, buf, sizeof(buf)); 79 usnic_dbg("%s\n", buf); 80} 81 82/* Start of netdev section */ 83static inline const char *usnic_ib_netdev_event_to_string(unsigned long event) 84{ 85 const char *event2str[] = {"NETDEV_NONE", "NETDEV_UP", "NETDEV_DOWN", 86 "NETDEV_REBOOT", "NETDEV_CHANGE", 87 "NETDEV_REGISTER", "NETDEV_UNREGISTER", "NETDEV_CHANGEMTU", 88 "NETDEV_CHANGEADDR", "NETDEV_GOING_DOWN", "NETDEV_FEAT_CHANGE", 89 "NETDEV_BONDING_FAILOVER", "NETDEV_PRE_UP", 90 "NETDEV_PRE_TYPE_CHANGE", "NETDEV_POST_TYPE_CHANGE", 91 "NETDEV_POST_INT", "NETDEV_UNREGISTER_FINAL", "NETDEV_RELEASE", 92 "NETDEV_NOTIFY_PEERS", "NETDEV_JOIN" 93 }; 94 95 if (event >= ARRAY_SIZE(event2str)) 96 return "UNKNOWN_NETDEV_EVENT"; 97 else 98 return event2str[event]; 99} 100 101static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev) 102{ 103 struct usnic_ib_ucontext *ctx; 104 struct usnic_ib_qp_grp *qp_grp; 105 enum ib_qp_state cur_state; 106 int status; 107 108 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock)); 109 110 list_for_each_entry(ctx, &us_ibdev->ctx_list, link) { 111 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) { 112 cur_state = qp_grp->state; 113 if (cur_state == IB_QPS_INIT || 114 cur_state == IB_QPS_RTR || 115 cur_state == IB_QPS_RTS) { 116 status = usnic_ib_qp_grp_modify(qp_grp, 117 IB_QPS_ERR, 118 NULL); 119 if (status) { 120 usnic_err("Failed to transistion qp grp %u from %s to %s\n", 121 qp_grp->grp_id, 122 usnic_ib_qp_grp_state_to_string 123 (cur_state), 124 usnic_ib_qp_grp_state_to_string 125 (IB_QPS_ERR)); 126 } 127 } 128 } 129 } 130} 131 132static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev, 133 unsigned long event) 134{ 135 struct net_device *netdev; 136 struct ib_event ib_event; 137 138 memset(&ib_event, 0, sizeof(ib_event)); 139 140 mutex_lock(&us_ibdev->usdev_lock); 141 netdev = us_ibdev->netdev; 142 switch (event) { 143 case NETDEV_REBOOT: 144 usnic_info("PF Reset on %s\n", us_ibdev->ib_dev.name); 145 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 146 ib_event.event = IB_EVENT_PORT_ERR; 147 ib_event.device = &us_ibdev->ib_dev; 148 ib_event.element.port_num = 1; 149 ib_dispatch_event(&ib_event); 150 break; 151 case NETDEV_UP: 152 case NETDEV_DOWN: 153 case NETDEV_CHANGE: 154 if (!us_ibdev->ufdev->link_up && 155 netif_carrier_ok(netdev)) { 156 usnic_fwd_carrier_up(us_ibdev->ufdev); 157 usnic_info("Link UP on %s\n", us_ibdev->ib_dev.name); 158 ib_event.event = IB_EVENT_PORT_ACTIVE; 159 ib_event.device = &us_ibdev->ib_dev; 160 ib_event.element.port_num = 1; 161 ib_dispatch_event(&ib_event); 162 } else if (us_ibdev->ufdev->link_up && 163 !netif_carrier_ok(netdev)) { 164 usnic_fwd_carrier_down(us_ibdev->ufdev); 165 usnic_info("Link DOWN on %s\n", us_ibdev->ib_dev.name); 166 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 167 ib_event.event = IB_EVENT_PORT_ERR; 168 ib_event.device = &us_ibdev->ib_dev; 169 ib_event.element.port_num = 1; 170 ib_dispatch_event(&ib_event); 171 } else { 172 usnic_dbg("Ignoring %s on %s\n", 173 usnic_ib_netdev_event_to_string(event), 174 us_ibdev->ib_dev.name); 175 } 176 break; 177 case NETDEV_CHANGEADDR: 178 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr, 179 sizeof(us_ibdev->ufdev->mac))) { 180 usnic_dbg("Ignoring addr change on %s\n", 181 us_ibdev->ib_dev.name); 182 } else { 183 usnic_info(" %s old mac: %pM new mac: %pM\n", 184 us_ibdev->ib_dev.name, 185 us_ibdev->ufdev->mac, 186 netdev->dev_addr); 187 usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr); 188 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 189 ib_event.event = IB_EVENT_GID_CHANGE; 190 ib_event.device = &us_ibdev->ib_dev; 191 ib_event.element.port_num = 1; 192 ib_dispatch_event(&ib_event); 193 } 194 195 break; 196 case NETDEV_CHANGEMTU: 197 if (us_ibdev->ufdev->mtu != netdev->mtu) { 198 usnic_info("MTU Change on %s old: %u new: %u\n", 199 us_ibdev->ib_dev.name, 200 us_ibdev->ufdev->mtu, netdev->mtu); 201 usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu); 202 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 203 } else { 204 usnic_dbg("Ignoring MTU change on %s\n", 205 us_ibdev->ib_dev.name); 206 } 207 break; 208 default: 209 usnic_dbg("Ignoring event %s on %s", 210 usnic_ib_netdev_event_to_string(event), 211 us_ibdev->ib_dev.name); 212 } 213 mutex_unlock(&us_ibdev->usdev_lock); 214} 215 216static int usnic_ib_netdevice_event(struct notifier_block *notifier, 217 unsigned long event, void *ptr) 218{ 219 struct usnic_ib_dev *us_ibdev; 220 221 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 222 223 mutex_lock(&usnic_ib_ibdev_list_lock); 224 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 225 if (us_ibdev->netdev == netdev) { 226 usnic_ib_handle_usdev_event(us_ibdev, event); 227 break; 228 } 229 } 230 mutex_unlock(&usnic_ib_ibdev_list_lock); 231 232 return NOTIFY_DONE; 233} 234 235static struct notifier_block usnic_ib_netdevice_notifier = { 236 .notifier_call = usnic_ib_netdevice_event 237}; 238/* End of netdev section */ 239 240/* Start of inet section */ 241static int usnic_ib_handle_inet_event(struct usnic_ib_dev *us_ibdev, 242 unsigned long event, void *ptr) 243{ 244 struct in_ifaddr *ifa = ptr; 245 struct ib_event ib_event; 246 247 mutex_lock(&us_ibdev->usdev_lock); 248 249 switch (event) { 250 case NETDEV_DOWN: 251 usnic_info("%s via ip notifiers", 252 usnic_ib_netdev_event_to_string(event)); 253 usnic_fwd_del_ipaddr(us_ibdev->ufdev); 254 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 255 ib_event.event = IB_EVENT_GID_CHANGE; 256 ib_event.device = &us_ibdev->ib_dev; 257 ib_event.element.port_num = 1; 258 ib_dispatch_event(&ib_event); 259 break; 260 case NETDEV_UP: 261 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address); 262 usnic_info("%s via ip notifiers: ip %pI4", 263 usnic_ib_netdev_event_to_string(event), 264 &us_ibdev->ufdev->inaddr); 265 ib_event.event = IB_EVENT_GID_CHANGE; 266 ib_event.device = &us_ibdev->ib_dev; 267 ib_event.element.port_num = 1; 268 ib_dispatch_event(&ib_event); 269 break; 270 default: 271 usnic_info("Ignoring event %s on %s", 272 usnic_ib_netdev_event_to_string(event), 273 us_ibdev->ib_dev.name); 274 } 275 mutex_unlock(&us_ibdev->usdev_lock); 276 277 return NOTIFY_DONE; 278} 279 280static int usnic_ib_inetaddr_event(struct notifier_block *notifier, 281 unsigned long event, void *ptr) 282{ 283 struct usnic_ib_dev *us_ibdev; 284 struct in_ifaddr *ifa = ptr; 285 struct net_device *netdev = ifa->ifa_dev->dev; 286 287 mutex_lock(&usnic_ib_ibdev_list_lock); 288 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 289 if (us_ibdev->netdev == netdev) { 290 usnic_ib_handle_inet_event(us_ibdev, event, ptr); 291 break; 292 } 293 } 294 mutex_unlock(&usnic_ib_ibdev_list_lock); 295 296 return NOTIFY_DONE; 297} 298static struct notifier_block usnic_ib_inetaddr_notifier = { 299 .notifier_call = usnic_ib_inetaddr_event 300}; 301/* End of inet section*/ 302 303/* Start of PF discovery section */ 304static void *usnic_ib_device_add(struct pci_dev *dev) 305{ 306 struct usnic_ib_dev *us_ibdev; 307 union ib_gid gid; 308 struct in_ifaddr *in; 309 struct net_device *netdev; 310 311 usnic_dbg("\n"); 312 netdev = pci_get_drvdata(dev); 313 314 us_ibdev = (struct usnic_ib_dev *)ib_alloc_device(sizeof(*us_ibdev)); 315 if (IS_ERR_OR_NULL(us_ibdev)) { 316 usnic_err("Device %s context alloc failed\n", 317 netdev_name(pci_get_drvdata(dev))); 318 return ERR_PTR(us_ibdev ? PTR_ERR(us_ibdev) : -EFAULT); 319 } 320 321 us_ibdev->ufdev = usnic_fwd_dev_alloc(dev); 322 if (IS_ERR_OR_NULL(us_ibdev->ufdev)) { 323 usnic_err("Failed to alloc ufdev for %s with err %ld\n", 324 pci_name(dev), PTR_ERR(us_ibdev->ufdev)); 325 goto err_dealloc; 326 } 327 328 mutex_init(&us_ibdev->usdev_lock); 329 INIT_LIST_HEAD(&us_ibdev->vf_dev_list); 330 INIT_LIST_HEAD(&us_ibdev->ctx_list); 331 332 us_ibdev->pdev = dev; 333 us_ibdev->netdev = pci_get_drvdata(dev); 334 us_ibdev->ib_dev.owner = THIS_MODULE; 335 us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP; 336 us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT; 337 us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS; 338 us_ibdev->ib_dev.dma_device = &dev->dev; 339 us_ibdev->ib_dev.uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION; 340 strlcpy(us_ibdev->ib_dev.name, "usnic_%d", IB_DEVICE_NAME_MAX); 341 342 us_ibdev->ib_dev.uverbs_cmd_mask = 343 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 344 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 345 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 346 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 347 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 348 (1ull << IB_USER_VERBS_CMD_REG_MR) | 349 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 350 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 351 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 352 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 353 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 354 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 355 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 356 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 357 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | 358 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | 359 (1ull << IB_USER_VERBS_CMD_OPEN_QP); 360 361 us_ibdev->ib_dev.query_device = usnic_ib_query_device; 362 us_ibdev->ib_dev.query_port = usnic_ib_query_port; 363 us_ibdev->ib_dev.query_pkey = usnic_ib_query_pkey; 364 us_ibdev->ib_dev.query_gid = usnic_ib_query_gid; 365 us_ibdev->ib_dev.get_link_layer = usnic_ib_port_link_layer; 366 us_ibdev->ib_dev.alloc_pd = usnic_ib_alloc_pd; 367 us_ibdev->ib_dev.dealloc_pd = usnic_ib_dealloc_pd; 368 us_ibdev->ib_dev.create_qp = usnic_ib_create_qp; 369 us_ibdev->ib_dev.modify_qp = usnic_ib_modify_qp; 370 us_ibdev->ib_dev.query_qp = usnic_ib_query_qp; 371 us_ibdev->ib_dev.destroy_qp = usnic_ib_destroy_qp; 372 us_ibdev->ib_dev.create_cq = usnic_ib_create_cq; 373 us_ibdev->ib_dev.destroy_cq = usnic_ib_destroy_cq; 374 us_ibdev->ib_dev.reg_user_mr = usnic_ib_reg_mr; 375 us_ibdev->ib_dev.dereg_mr = usnic_ib_dereg_mr; 376 us_ibdev->ib_dev.alloc_ucontext = usnic_ib_alloc_ucontext; 377 us_ibdev->ib_dev.dealloc_ucontext = usnic_ib_dealloc_ucontext; 378 us_ibdev->ib_dev.mmap = usnic_ib_mmap; 379 us_ibdev->ib_dev.create_ah = usnic_ib_create_ah; 380 us_ibdev->ib_dev.destroy_ah = usnic_ib_destroy_ah; 381 us_ibdev->ib_dev.post_send = usnic_ib_post_send; 382 us_ibdev->ib_dev.post_recv = usnic_ib_post_recv; 383 us_ibdev->ib_dev.poll_cq = usnic_ib_poll_cq; 384 us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq; 385 us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr; 386 387 388 if (ib_register_device(&us_ibdev->ib_dev, NULL)) 389 goto err_fwd_dealloc; 390 391 usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu); 392 usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr); 393 if (netif_carrier_ok(us_ibdev->netdev)) 394 usnic_fwd_carrier_up(us_ibdev->ufdev); 395 396 in = ((struct in_device *)(netdev->ip_ptr))->ifa_list; 397 if (in != NULL) 398 usnic_fwd_add_ipaddr(us_ibdev->ufdev, in->ifa_address); 399 400 usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr, 401 us_ibdev->ufdev->inaddr, &gid.raw[0]); 402 memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id, 403 sizeof(gid.global.interface_id)); 404 kref_init(&us_ibdev->vf_cnt); 405 406 usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n", 407 us_ibdev->ib_dev.name, netdev_name(us_ibdev->netdev), 408 us_ibdev->ufdev->mac, us_ibdev->ufdev->link_up, 409 us_ibdev->ufdev->mtu); 410 return us_ibdev; 411 412err_fwd_dealloc: 413 usnic_fwd_dev_free(us_ibdev->ufdev); 414err_dealloc: 415 usnic_err("failed -- deallocing device\n"); 416 ib_dealloc_device(&us_ibdev->ib_dev); 417 return NULL; 418} 419 420static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev) 421{ 422 usnic_info("Unregistering %s\n", us_ibdev->ib_dev.name); 423 usnic_ib_sysfs_unregister_usdev(us_ibdev); 424 usnic_fwd_dev_free(us_ibdev->ufdev); 425 ib_unregister_device(&us_ibdev->ib_dev); 426 ib_dealloc_device(&us_ibdev->ib_dev); 427} 428 429static void usnic_ib_undiscover_pf(struct kref *kref) 430{ 431 struct usnic_ib_dev *us_ibdev, *tmp; 432 struct pci_dev *dev; 433 bool found = false; 434 435 dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev; 436 mutex_lock(&usnic_ib_ibdev_list_lock); 437 list_for_each_entry_safe(us_ibdev, tmp, 438 &usnic_ib_ibdev_list, ib_dev_link) { 439 if (us_ibdev->pdev == dev) { 440 list_del(&us_ibdev->ib_dev_link); 441 usnic_ib_device_remove(us_ibdev); 442 found = true; 443 break; 444 } 445 } 446 447 WARN(!found, "Failed to remove PF %s\n", pci_name(dev)); 448 449 mutex_unlock(&usnic_ib_ibdev_list_lock); 450} 451 452static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic) 453{ 454 struct usnic_ib_dev *us_ibdev; 455 struct pci_dev *parent_pci, *vf_pci; 456 int err; 457 458 vf_pci = usnic_vnic_get_pdev(vnic); 459 parent_pci = pci_physfn(vf_pci); 460 461 BUG_ON(!parent_pci); 462 463 mutex_lock(&usnic_ib_ibdev_list_lock); 464 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 465 if (us_ibdev->pdev == parent_pci) { 466 kref_get(&us_ibdev->vf_cnt); 467 goto out; 468 } 469 } 470 471 us_ibdev = usnic_ib_device_add(parent_pci); 472 if (IS_ERR_OR_NULL(us_ibdev)) { 473 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT); 474 goto out; 475 } 476 477 err = usnic_ib_sysfs_register_usdev(us_ibdev); 478 if (err) { 479 usnic_ib_device_remove(us_ibdev); 480 us_ibdev = ERR_PTR(err); 481 goto out; 482 } 483 484 list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list); 485out: 486 mutex_unlock(&usnic_ib_ibdev_list_lock); 487 return us_ibdev; 488} 489/* End of PF discovery section */ 490 491/* Start of PCI section */ 492 493static const struct pci_device_id usnic_ib_pci_ids[] = { 494 {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)}, 495 {0,} 496}; 497 498static int usnic_ib_pci_probe(struct pci_dev *pdev, 499 const struct pci_device_id *id) 500{ 501 int err; 502 struct usnic_ib_dev *pf; 503 struct usnic_ib_vf *vf; 504 enum usnic_vnic_res_type res_type; 505 506 vf = kzalloc(sizeof(*vf), GFP_KERNEL); 507 if (!vf) 508 return -ENOMEM; 509 510 err = pci_enable_device(pdev); 511 if (err) { 512 usnic_err("Failed to enable %s with err %d\n", 513 pci_name(pdev), err); 514 goto out_clean_vf; 515 } 516 517 err = pci_request_regions(pdev, DRV_NAME); 518 if (err) { 519 usnic_err("Failed to request region for %s with err %d\n", 520 pci_name(pdev), err); 521 goto out_disable_device; 522 } 523 524 pci_set_master(pdev); 525 pci_set_drvdata(pdev, vf); 526 527 vf->vnic = usnic_vnic_alloc(pdev); 528 if (IS_ERR_OR_NULL(vf->vnic)) { 529 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM; 530 usnic_err("Failed to alloc vnic for %s with err %d\n", 531 pci_name(pdev), err); 532 goto out_release_regions; 533 } 534 535 pf = usnic_ib_discover_pf(vf->vnic); 536 if (IS_ERR_OR_NULL(pf)) { 537 usnic_err("Failed to discover pf of vnic %s with err%ld\n", 538 pci_name(pdev), PTR_ERR(pf)); 539 err = pf ? PTR_ERR(pf) : -EFAULT; 540 goto out_clean_vnic; 541 } 542 543 vf->pf = pf; 544 spin_lock_init(&vf->lock); 545 mutex_lock(&pf->usdev_lock); 546 list_add_tail(&vf->link, &pf->vf_dev_list); 547 /* 548 * Save max settings (will be same for each VF, easier to re-write than 549 * to say "if (!set) { set_values(); set=1; } 550 */ 551 for (res_type = USNIC_VNIC_RES_TYPE_EOL+1; 552 res_type < USNIC_VNIC_RES_TYPE_MAX; 553 res_type++) { 554 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic, 555 res_type); 556 } 557 558 mutex_unlock(&pf->usdev_lock); 559 560 usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev), 561 pf->ib_dev.name); 562 usnic_ib_log_vf(vf); 563 return 0; 564 565out_clean_vnic: 566 usnic_vnic_free(vf->vnic); 567out_release_regions: 568 pci_set_drvdata(pdev, NULL); 569 pci_clear_master(pdev); 570 pci_release_regions(pdev); 571out_disable_device: 572 pci_disable_device(pdev); 573out_clean_vf: 574 kfree(vf); 575 return err; 576} 577 578static void usnic_ib_pci_remove(struct pci_dev *pdev) 579{ 580 struct usnic_ib_vf *vf = pci_get_drvdata(pdev); 581 struct usnic_ib_dev *pf = vf->pf; 582 583 mutex_lock(&pf->usdev_lock); 584 list_del(&vf->link); 585 mutex_unlock(&pf->usdev_lock); 586 587 kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf); 588 usnic_vnic_free(vf->vnic); 589 pci_set_drvdata(pdev, NULL); 590 pci_clear_master(pdev); 591 pci_release_regions(pdev); 592 pci_disable_device(pdev); 593 kfree(vf); 594 595 usnic_info("Removed VF %s\n", pci_name(pdev)); 596} 597 598/* PCI driver entry points */ 599static struct pci_driver usnic_ib_pci_driver = { 600 .name = DRV_NAME, 601 .id_table = usnic_ib_pci_ids, 602 .probe = usnic_ib_pci_probe, 603 .remove = usnic_ib_pci_remove, 604}; 605/* End of PCI section */ 606 607/* Start of module section */ 608static int __init usnic_ib_init(void) 609{ 610 int err; 611 612 printk_once(KERN_INFO "%s", usnic_version); 613 614 err = usnic_uiom_init(DRV_NAME); 615 if (err) { 616 usnic_err("Unable to initalize umem with err %d\n", err); 617 return err; 618 } 619 620 if (pci_register_driver(&usnic_ib_pci_driver)) { 621 usnic_err("Unable to register with PCI\n"); 622 goto out_umem_fini; 623 } 624 625 err = register_netdevice_notifier(&usnic_ib_netdevice_notifier); 626 if (err) { 627 usnic_err("Failed to register netdev notifier\n"); 628 goto out_pci_unreg; 629 } 630 631 err = register_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 632 if (err) { 633 usnic_err("Failed to register inet addr notifier\n"); 634 goto out_unreg_netdev_notifier; 635 } 636 637 err = usnic_transport_init(); 638 if (err) { 639 usnic_err("Failed to initialize transport\n"); 640 goto out_unreg_inetaddr_notifier; 641 } 642 643 usnic_debugfs_init(); 644 645 return 0; 646 647out_unreg_inetaddr_notifier: 648 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 649out_unreg_netdev_notifier: 650 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 651out_pci_unreg: 652 pci_unregister_driver(&usnic_ib_pci_driver); 653out_umem_fini: 654 usnic_uiom_fini(); 655 656 return err; 657} 658 659static void __exit usnic_ib_destroy(void) 660{ 661 usnic_dbg("\n"); 662 usnic_debugfs_exit(); 663 usnic_transport_fini(); 664 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 665 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 666 pci_unregister_driver(&usnic_ib_pci_driver); 667 usnic_uiom_fini(); 668} 669 670MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver"); 671MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>"); 672MODULE_LICENSE("Dual BSD/GPL"); 673MODULE_VERSION(DRV_VERSION); 674module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR); 675module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR); 676MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3"); 677MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs"); 678MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids); 679 680module_init(usnic_ib_init); 681module_exit(usnic_ib_destroy); 682/* End of module section */ 683