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 ", vf->pf->ib_dev.name); 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 inline const char *usnic_ib_netdev_event_to_string(unsigned long event) 99 { 100 const char *event2str[] = {"NETDEV_NONE", "NETDEV_UP", "NETDEV_DOWN", 101 "NETDEV_REBOOT", "NETDEV_CHANGE", 102 "NETDEV_REGISTER", "NETDEV_UNREGISTER", "NETDEV_CHANGEMTU", 103 "NETDEV_CHANGEADDR", "NETDEV_GOING_DOWN", "NETDEV_FEAT_CHANGE", 104 "NETDEV_BONDING_FAILOVER", "NETDEV_PRE_UP", 105 "NETDEV_PRE_TYPE_CHANGE", "NETDEV_POST_TYPE_CHANGE", 106 "NETDEV_POST_INT", "NETDEV_UNREGISTER_FINAL", "NETDEV_RELEASE", 107 "NETDEV_NOTIFY_PEERS", "NETDEV_JOIN" 108 }; 109 110 if (event >= ARRAY_SIZE(event2str)) 111 return "UNKNOWN_NETDEV_EVENT"; 112 else 113 return event2str[event]; 114 } 115 116 static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev) 117 { 118 struct usnic_ib_ucontext *ctx; 119 struct usnic_ib_qp_grp *qp_grp; 120 enum ib_qp_state cur_state; 121 int status; 122 123 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock)); 124 125 list_for_each_entry(ctx, &us_ibdev->ctx_list, link) { 126 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) { 127 cur_state = qp_grp->state; 128 if (cur_state == IB_QPS_INIT || 129 cur_state == IB_QPS_RTR || 130 cur_state == IB_QPS_RTS) { 131 status = usnic_ib_qp_grp_modify(qp_grp, 132 IB_QPS_ERR, 133 NULL); 134 if (status) { 135 usnic_err("Failed to transistion qp grp %u from %s to %s\n", 136 qp_grp->grp_id, 137 usnic_ib_qp_grp_state_to_string 138 (cur_state), 139 usnic_ib_qp_grp_state_to_string 140 (IB_QPS_ERR)); 141 } 142 } 143 } 144 } 145 } 146 147 static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev, 148 unsigned long event) 149 { 150 struct net_device *netdev; 151 struct ib_event ib_event; 152 153 memset(&ib_event, 0, sizeof(ib_event)); 154 155 mutex_lock(&us_ibdev->usdev_lock); 156 netdev = us_ibdev->netdev; 157 switch (event) { 158 case NETDEV_REBOOT: 159 usnic_info("PF Reset on %s\n", us_ibdev->ib_dev.name); 160 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 161 ib_event.event = IB_EVENT_PORT_ERR; 162 ib_event.device = &us_ibdev->ib_dev; 163 ib_event.element.port_num = 1; 164 ib_dispatch_event(&ib_event); 165 break; 166 case NETDEV_UP: 167 case NETDEV_DOWN: 168 case NETDEV_CHANGE: 169 if (!us_ibdev->ufdev->link_up && 170 netif_carrier_ok(netdev)) { 171 usnic_fwd_carrier_up(us_ibdev->ufdev); 172 usnic_info("Link UP on %s\n", us_ibdev->ib_dev.name); 173 ib_event.event = IB_EVENT_PORT_ACTIVE; 174 ib_event.device = &us_ibdev->ib_dev; 175 ib_event.element.port_num = 1; 176 ib_dispatch_event(&ib_event); 177 } else if (us_ibdev->ufdev->link_up && 178 !netif_carrier_ok(netdev)) { 179 usnic_fwd_carrier_down(us_ibdev->ufdev); 180 usnic_info("Link DOWN on %s\n", us_ibdev->ib_dev.name); 181 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 182 ib_event.event = IB_EVENT_PORT_ERR; 183 ib_event.device = &us_ibdev->ib_dev; 184 ib_event.element.port_num = 1; 185 ib_dispatch_event(&ib_event); 186 } else { 187 usnic_dbg("Ignoring %s on %s\n", 188 usnic_ib_netdev_event_to_string(event), 189 us_ibdev->ib_dev.name); 190 } 191 break; 192 case NETDEV_CHANGEADDR: 193 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr, 194 sizeof(us_ibdev->ufdev->mac))) { 195 usnic_dbg("Ignoring addr change on %s\n", 196 us_ibdev->ib_dev.name); 197 } else { 198 usnic_info(" %s old mac: %pM new mac: %pM\n", 199 us_ibdev->ib_dev.name, 200 us_ibdev->ufdev->mac, 201 netdev->dev_addr); 202 usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr); 203 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 204 ib_event.event = IB_EVENT_GID_CHANGE; 205 ib_event.device = &us_ibdev->ib_dev; 206 ib_event.element.port_num = 1; 207 ib_dispatch_event(&ib_event); 208 } 209 210 break; 211 case NETDEV_CHANGEMTU: 212 if (us_ibdev->ufdev->mtu != netdev->mtu) { 213 usnic_info("MTU Change on %s old: %u new: %u\n", 214 us_ibdev->ib_dev.name, 215 us_ibdev->ufdev->mtu, netdev->mtu); 216 usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu); 217 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 218 } else { 219 usnic_dbg("Ignoring MTU change on %s\n", 220 us_ibdev->ib_dev.name); 221 } 222 break; 223 default: 224 usnic_dbg("Ignoring event %s on %s", 225 usnic_ib_netdev_event_to_string(event), 226 us_ibdev->ib_dev.name); 227 } 228 mutex_unlock(&us_ibdev->usdev_lock); 229 } 230 231 static int usnic_ib_netdevice_event(struct notifier_block *notifier, 232 unsigned long event, void *ptr) 233 { 234 struct usnic_ib_dev *us_ibdev; 235 236 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 237 238 mutex_lock(&usnic_ib_ibdev_list_lock); 239 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 240 if (us_ibdev->netdev == netdev) { 241 usnic_ib_handle_usdev_event(us_ibdev, event); 242 break; 243 } 244 } 245 mutex_unlock(&usnic_ib_ibdev_list_lock); 246 247 return NOTIFY_DONE; 248 } 249 250 static struct notifier_block usnic_ib_netdevice_notifier = { 251 .notifier_call = usnic_ib_netdevice_event 252 }; 253 /* End of netdev section */ 254 255 /* Start of inet section */ 256 static int usnic_ib_handle_inet_event(struct usnic_ib_dev *us_ibdev, 257 unsigned long event, void *ptr) 258 { 259 struct in_ifaddr *ifa = ptr; 260 struct ib_event ib_event; 261 262 mutex_lock(&us_ibdev->usdev_lock); 263 264 switch (event) { 265 case NETDEV_DOWN: 266 usnic_info("%s via ip notifiers", 267 usnic_ib_netdev_event_to_string(event)); 268 usnic_fwd_del_ipaddr(us_ibdev->ufdev); 269 usnic_ib_qp_grp_modify_active_to_err(us_ibdev); 270 ib_event.event = IB_EVENT_GID_CHANGE; 271 ib_event.device = &us_ibdev->ib_dev; 272 ib_event.element.port_num = 1; 273 ib_dispatch_event(&ib_event); 274 break; 275 case NETDEV_UP: 276 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address); 277 usnic_info("%s via ip notifiers: ip %pI4", 278 usnic_ib_netdev_event_to_string(event), 279 &us_ibdev->ufdev->inaddr); 280 ib_event.event = IB_EVENT_GID_CHANGE; 281 ib_event.device = &us_ibdev->ib_dev; 282 ib_event.element.port_num = 1; 283 ib_dispatch_event(&ib_event); 284 break; 285 default: 286 usnic_info("Ignoring event %s on %s", 287 usnic_ib_netdev_event_to_string(event), 288 us_ibdev->ib_dev.name); 289 } 290 mutex_unlock(&us_ibdev->usdev_lock); 291 292 return NOTIFY_DONE; 293 } 294 295 static int usnic_ib_inetaddr_event(struct notifier_block *notifier, 296 unsigned long event, void *ptr) 297 { 298 struct usnic_ib_dev *us_ibdev; 299 struct in_ifaddr *ifa = ptr; 300 struct net_device *netdev = ifa->ifa_dev->dev; 301 302 mutex_lock(&usnic_ib_ibdev_list_lock); 303 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 304 if (us_ibdev->netdev == netdev) { 305 usnic_ib_handle_inet_event(us_ibdev, event, ptr); 306 break; 307 } 308 } 309 mutex_unlock(&usnic_ib_ibdev_list_lock); 310 311 return NOTIFY_DONE; 312 } 313 static struct notifier_block usnic_ib_inetaddr_notifier = { 314 .notifier_call = usnic_ib_inetaddr_event 315 }; 316 /* End of inet section*/ 317 318 static int usnic_port_immutable(struct ib_device *ibdev, u8 port_num, 319 struct ib_port_immutable *immutable) 320 { 321 struct ib_port_attr attr; 322 int err; 323 324 err = usnic_ib_query_port(ibdev, port_num, &attr); 325 if (err) 326 return err; 327 328 immutable->pkey_tbl_len = attr.pkey_tbl_len; 329 immutable->gid_tbl_len = attr.gid_tbl_len; 330 331 return 0; 332 } 333 334 static void usnic_get_dev_fw_str(struct ib_device *device, 335 char *str, 336 size_t str_len) 337 { 338 struct usnic_ib_dev *us_ibdev = 339 container_of(device, struct usnic_ib_dev, ib_dev); 340 struct ethtool_drvinfo info; 341 342 mutex_lock(&us_ibdev->usdev_lock); 343 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info); 344 mutex_unlock(&us_ibdev->usdev_lock); 345 346 snprintf(str, str_len, "%s", info.fw_version); 347 } 348 349 /* Start of PF discovery section */ 350 static void *usnic_ib_device_add(struct pci_dev *dev) 351 { 352 struct usnic_ib_dev *us_ibdev; 353 union ib_gid gid; 354 struct in_ifaddr *in; 355 struct net_device *netdev; 356 357 usnic_dbg("\n"); 358 netdev = pci_get_drvdata(dev); 359 360 us_ibdev = (struct usnic_ib_dev *)ib_alloc_device(sizeof(*us_ibdev)); 361 if (!us_ibdev) { 362 usnic_err("Device %s context alloc failed\n", 363 netdev_name(pci_get_drvdata(dev))); 364 return ERR_PTR(-EFAULT); 365 } 366 367 us_ibdev->ufdev = usnic_fwd_dev_alloc(dev); 368 if (!us_ibdev->ufdev) { 369 usnic_err("Failed to alloc ufdev for %s\n", pci_name(dev)); 370 goto err_dealloc; 371 } 372 373 mutex_init(&us_ibdev->usdev_lock); 374 INIT_LIST_HEAD(&us_ibdev->vf_dev_list); 375 INIT_LIST_HEAD(&us_ibdev->ctx_list); 376 377 us_ibdev->pdev = dev; 378 us_ibdev->netdev = pci_get_drvdata(dev); 379 us_ibdev->ib_dev.owner = THIS_MODULE; 380 us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP; 381 us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT; 382 us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS; 383 us_ibdev->ib_dev.dma_device = &dev->dev; 384 us_ibdev->ib_dev.uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION; 385 strlcpy(us_ibdev->ib_dev.name, "usnic_%d", IB_DEVICE_NAME_MAX); 386 387 us_ibdev->ib_dev.uverbs_cmd_mask = 388 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 389 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 390 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 391 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 392 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 393 (1ull << IB_USER_VERBS_CMD_REG_MR) | 394 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 395 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 396 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 397 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 398 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 399 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 400 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 401 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 402 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | 403 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | 404 (1ull << IB_USER_VERBS_CMD_OPEN_QP); 405 406 us_ibdev->ib_dev.query_device = usnic_ib_query_device; 407 us_ibdev->ib_dev.query_port = usnic_ib_query_port; 408 us_ibdev->ib_dev.query_pkey = usnic_ib_query_pkey; 409 us_ibdev->ib_dev.query_gid = usnic_ib_query_gid; 410 us_ibdev->ib_dev.get_link_layer = usnic_ib_port_link_layer; 411 us_ibdev->ib_dev.alloc_pd = usnic_ib_alloc_pd; 412 us_ibdev->ib_dev.dealloc_pd = usnic_ib_dealloc_pd; 413 us_ibdev->ib_dev.create_qp = usnic_ib_create_qp; 414 us_ibdev->ib_dev.modify_qp = usnic_ib_modify_qp; 415 us_ibdev->ib_dev.query_qp = usnic_ib_query_qp; 416 us_ibdev->ib_dev.destroy_qp = usnic_ib_destroy_qp; 417 us_ibdev->ib_dev.create_cq = usnic_ib_create_cq; 418 us_ibdev->ib_dev.destroy_cq = usnic_ib_destroy_cq; 419 us_ibdev->ib_dev.reg_user_mr = usnic_ib_reg_mr; 420 us_ibdev->ib_dev.dereg_mr = usnic_ib_dereg_mr; 421 us_ibdev->ib_dev.alloc_ucontext = usnic_ib_alloc_ucontext; 422 us_ibdev->ib_dev.dealloc_ucontext = usnic_ib_dealloc_ucontext; 423 us_ibdev->ib_dev.mmap = usnic_ib_mmap; 424 us_ibdev->ib_dev.create_ah = usnic_ib_create_ah; 425 us_ibdev->ib_dev.destroy_ah = usnic_ib_destroy_ah; 426 us_ibdev->ib_dev.post_send = usnic_ib_post_send; 427 us_ibdev->ib_dev.post_recv = usnic_ib_post_recv; 428 us_ibdev->ib_dev.poll_cq = usnic_ib_poll_cq; 429 us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq; 430 us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr; 431 us_ibdev->ib_dev.get_port_immutable = usnic_port_immutable; 432 us_ibdev->ib_dev.get_dev_fw_str = usnic_get_dev_fw_str; 433 434 435 if (ib_register_device(&us_ibdev->ib_dev, NULL)) 436 goto err_fwd_dealloc; 437 438 usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu); 439 usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr); 440 if (netif_carrier_ok(us_ibdev->netdev)) 441 usnic_fwd_carrier_up(us_ibdev->ufdev); 442 443 in = ((struct in_device *)(netdev->ip_ptr))->ifa_list; 444 if (in != NULL) 445 usnic_fwd_add_ipaddr(us_ibdev->ufdev, in->ifa_address); 446 447 usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr, 448 us_ibdev->ufdev->inaddr, &gid.raw[0]); 449 memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id, 450 sizeof(gid.global.interface_id)); 451 kref_init(&us_ibdev->vf_cnt); 452 453 usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n", 454 us_ibdev->ib_dev.name, netdev_name(us_ibdev->netdev), 455 us_ibdev->ufdev->mac, us_ibdev->ufdev->link_up, 456 us_ibdev->ufdev->mtu); 457 return us_ibdev; 458 459 err_fwd_dealloc: 460 usnic_fwd_dev_free(us_ibdev->ufdev); 461 err_dealloc: 462 usnic_err("failed -- deallocing device\n"); 463 ib_dealloc_device(&us_ibdev->ib_dev); 464 return NULL; 465 } 466 467 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev) 468 { 469 usnic_info("Unregistering %s\n", us_ibdev->ib_dev.name); 470 usnic_ib_sysfs_unregister_usdev(us_ibdev); 471 usnic_fwd_dev_free(us_ibdev->ufdev); 472 ib_unregister_device(&us_ibdev->ib_dev); 473 ib_dealloc_device(&us_ibdev->ib_dev); 474 } 475 476 static void usnic_ib_undiscover_pf(struct kref *kref) 477 { 478 struct usnic_ib_dev *us_ibdev, *tmp; 479 struct pci_dev *dev; 480 bool found = false; 481 482 dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev; 483 mutex_lock(&usnic_ib_ibdev_list_lock); 484 list_for_each_entry_safe(us_ibdev, tmp, 485 &usnic_ib_ibdev_list, ib_dev_link) { 486 if (us_ibdev->pdev == dev) { 487 list_del(&us_ibdev->ib_dev_link); 488 usnic_ib_device_remove(us_ibdev); 489 found = true; 490 break; 491 } 492 } 493 494 WARN(!found, "Failed to remove PF %s\n", pci_name(dev)); 495 496 mutex_unlock(&usnic_ib_ibdev_list_lock); 497 } 498 499 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic) 500 { 501 struct usnic_ib_dev *us_ibdev; 502 struct pci_dev *parent_pci, *vf_pci; 503 int err; 504 505 vf_pci = usnic_vnic_get_pdev(vnic); 506 parent_pci = pci_physfn(vf_pci); 507 508 BUG_ON(!parent_pci); 509 510 mutex_lock(&usnic_ib_ibdev_list_lock); 511 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 512 if (us_ibdev->pdev == parent_pci) { 513 kref_get(&us_ibdev->vf_cnt); 514 goto out; 515 } 516 } 517 518 us_ibdev = usnic_ib_device_add(parent_pci); 519 if (IS_ERR_OR_NULL(us_ibdev)) { 520 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT); 521 goto out; 522 } 523 524 err = usnic_ib_sysfs_register_usdev(us_ibdev); 525 if (err) { 526 usnic_ib_device_remove(us_ibdev); 527 us_ibdev = ERR_PTR(err); 528 goto out; 529 } 530 531 list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list); 532 out: 533 mutex_unlock(&usnic_ib_ibdev_list_lock); 534 return us_ibdev; 535 } 536 /* End of PF discovery section */ 537 538 /* Start of PCI section */ 539 540 static const struct pci_device_id usnic_ib_pci_ids[] = { 541 {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)}, 542 {0,} 543 }; 544 545 static int usnic_ib_pci_probe(struct pci_dev *pdev, 546 const struct pci_device_id *id) 547 { 548 int err; 549 struct usnic_ib_dev *pf; 550 struct usnic_ib_vf *vf; 551 enum usnic_vnic_res_type res_type; 552 553 vf = kzalloc(sizeof(*vf), GFP_KERNEL); 554 if (!vf) 555 return -ENOMEM; 556 557 err = pci_enable_device(pdev); 558 if (err) { 559 usnic_err("Failed to enable %s with err %d\n", 560 pci_name(pdev), err); 561 goto out_clean_vf; 562 } 563 564 err = pci_request_regions(pdev, DRV_NAME); 565 if (err) { 566 usnic_err("Failed to request region for %s with err %d\n", 567 pci_name(pdev), err); 568 goto out_disable_device; 569 } 570 571 pci_set_master(pdev); 572 pci_set_drvdata(pdev, vf); 573 574 vf->vnic = usnic_vnic_alloc(pdev); 575 if (IS_ERR_OR_NULL(vf->vnic)) { 576 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM; 577 usnic_err("Failed to alloc vnic for %s with err %d\n", 578 pci_name(pdev), err); 579 goto out_release_regions; 580 } 581 582 pf = usnic_ib_discover_pf(vf->vnic); 583 if (IS_ERR_OR_NULL(pf)) { 584 usnic_err("Failed to discover pf of vnic %s with err%ld\n", 585 pci_name(pdev), PTR_ERR(pf)); 586 err = pf ? PTR_ERR(pf) : -EFAULT; 587 goto out_clean_vnic; 588 } 589 590 vf->pf = pf; 591 spin_lock_init(&vf->lock); 592 mutex_lock(&pf->usdev_lock); 593 list_add_tail(&vf->link, &pf->vf_dev_list); 594 /* 595 * Save max settings (will be same for each VF, easier to re-write than 596 * to say "if (!set) { set_values(); set=1; } 597 */ 598 for (res_type = USNIC_VNIC_RES_TYPE_EOL+1; 599 res_type < USNIC_VNIC_RES_TYPE_MAX; 600 res_type++) { 601 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic, 602 res_type); 603 } 604 605 mutex_unlock(&pf->usdev_lock); 606 607 usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev), 608 pf->ib_dev.name); 609 usnic_ib_log_vf(vf); 610 return 0; 611 612 out_clean_vnic: 613 usnic_vnic_free(vf->vnic); 614 out_release_regions: 615 pci_set_drvdata(pdev, NULL); 616 pci_clear_master(pdev); 617 pci_release_regions(pdev); 618 out_disable_device: 619 pci_disable_device(pdev); 620 out_clean_vf: 621 kfree(vf); 622 return err; 623 } 624 625 static void usnic_ib_pci_remove(struct pci_dev *pdev) 626 { 627 struct usnic_ib_vf *vf = pci_get_drvdata(pdev); 628 struct usnic_ib_dev *pf = vf->pf; 629 630 mutex_lock(&pf->usdev_lock); 631 list_del(&vf->link); 632 mutex_unlock(&pf->usdev_lock); 633 634 kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf); 635 usnic_vnic_free(vf->vnic); 636 pci_set_drvdata(pdev, NULL); 637 pci_clear_master(pdev); 638 pci_release_regions(pdev); 639 pci_disable_device(pdev); 640 kfree(vf); 641 642 usnic_info("Removed VF %s\n", pci_name(pdev)); 643 } 644 645 /* PCI driver entry points */ 646 static struct pci_driver usnic_ib_pci_driver = { 647 .name = DRV_NAME, 648 .id_table = usnic_ib_pci_ids, 649 .probe = usnic_ib_pci_probe, 650 .remove = usnic_ib_pci_remove, 651 }; 652 /* End of PCI section */ 653 654 /* Start of module section */ 655 static int __init usnic_ib_init(void) 656 { 657 int err; 658 659 printk_once(KERN_INFO "%s", usnic_version); 660 661 err = usnic_uiom_init(DRV_NAME); 662 if (err) { 663 usnic_err("Unable to initalize umem with err %d\n", err); 664 return err; 665 } 666 667 if (pci_register_driver(&usnic_ib_pci_driver)) { 668 usnic_err("Unable to register with PCI\n"); 669 goto out_umem_fini; 670 } 671 672 err = register_netdevice_notifier(&usnic_ib_netdevice_notifier); 673 if (err) { 674 usnic_err("Failed to register netdev notifier\n"); 675 goto out_pci_unreg; 676 } 677 678 err = register_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 679 if (err) { 680 usnic_err("Failed to register inet addr notifier\n"); 681 goto out_unreg_netdev_notifier; 682 } 683 684 err = usnic_transport_init(); 685 if (err) { 686 usnic_err("Failed to initialize transport\n"); 687 goto out_unreg_inetaddr_notifier; 688 } 689 690 usnic_debugfs_init(); 691 692 return 0; 693 694 out_unreg_inetaddr_notifier: 695 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 696 out_unreg_netdev_notifier: 697 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 698 out_pci_unreg: 699 pci_unregister_driver(&usnic_ib_pci_driver); 700 out_umem_fini: 701 usnic_uiom_fini(); 702 703 return err; 704 } 705 706 static void __exit usnic_ib_destroy(void) 707 { 708 usnic_dbg("\n"); 709 usnic_debugfs_exit(); 710 usnic_transport_fini(); 711 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 712 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 713 pci_unregister_driver(&usnic_ib_pci_driver); 714 usnic_uiom_fini(); 715 } 716 717 MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver"); 718 MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>"); 719 MODULE_LICENSE("Dual BSD/GPL"); 720 MODULE_VERSION(DRV_VERSION); 721 module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR); 722 module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR); 723 MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3"); 724 MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs"); 725 MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids); 726 727 module_init(usnic_ib_init); 728 module_exit(usnic_ib_destroy); 729 /* End of module section */ 730