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 /* Start of PF discovery section */ 335 static void *usnic_ib_device_add(struct pci_dev *dev) 336 { 337 struct usnic_ib_dev *us_ibdev; 338 union ib_gid gid; 339 struct in_ifaddr *in; 340 struct net_device *netdev; 341 342 usnic_dbg("\n"); 343 netdev = pci_get_drvdata(dev); 344 345 us_ibdev = (struct usnic_ib_dev *)ib_alloc_device(sizeof(*us_ibdev)); 346 if (!us_ibdev) { 347 usnic_err("Device %s context alloc failed\n", 348 netdev_name(pci_get_drvdata(dev))); 349 return ERR_PTR(-EFAULT); 350 } 351 352 us_ibdev->ufdev = usnic_fwd_dev_alloc(dev); 353 if (!us_ibdev->ufdev) { 354 usnic_err("Failed to alloc ufdev for %s\n", pci_name(dev)); 355 goto err_dealloc; 356 } 357 358 mutex_init(&us_ibdev->usdev_lock); 359 INIT_LIST_HEAD(&us_ibdev->vf_dev_list); 360 INIT_LIST_HEAD(&us_ibdev->ctx_list); 361 362 us_ibdev->pdev = dev; 363 us_ibdev->netdev = pci_get_drvdata(dev); 364 us_ibdev->ib_dev.owner = THIS_MODULE; 365 us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP; 366 us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT; 367 us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS; 368 us_ibdev->ib_dev.dma_device = &dev->dev; 369 us_ibdev->ib_dev.uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION; 370 strlcpy(us_ibdev->ib_dev.name, "usnic_%d", IB_DEVICE_NAME_MAX); 371 372 us_ibdev->ib_dev.uverbs_cmd_mask = 373 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 374 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 375 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 376 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 377 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 378 (1ull << IB_USER_VERBS_CMD_REG_MR) | 379 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 380 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 381 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 382 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 383 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 384 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 385 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 386 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 387 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | 388 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | 389 (1ull << IB_USER_VERBS_CMD_OPEN_QP); 390 391 us_ibdev->ib_dev.query_device = usnic_ib_query_device; 392 us_ibdev->ib_dev.query_port = usnic_ib_query_port; 393 us_ibdev->ib_dev.query_pkey = usnic_ib_query_pkey; 394 us_ibdev->ib_dev.query_gid = usnic_ib_query_gid; 395 us_ibdev->ib_dev.get_link_layer = usnic_ib_port_link_layer; 396 us_ibdev->ib_dev.alloc_pd = usnic_ib_alloc_pd; 397 us_ibdev->ib_dev.dealloc_pd = usnic_ib_dealloc_pd; 398 us_ibdev->ib_dev.create_qp = usnic_ib_create_qp; 399 us_ibdev->ib_dev.modify_qp = usnic_ib_modify_qp; 400 us_ibdev->ib_dev.query_qp = usnic_ib_query_qp; 401 us_ibdev->ib_dev.destroy_qp = usnic_ib_destroy_qp; 402 us_ibdev->ib_dev.create_cq = usnic_ib_create_cq; 403 us_ibdev->ib_dev.destroy_cq = usnic_ib_destroy_cq; 404 us_ibdev->ib_dev.reg_user_mr = usnic_ib_reg_mr; 405 us_ibdev->ib_dev.dereg_mr = usnic_ib_dereg_mr; 406 us_ibdev->ib_dev.alloc_ucontext = usnic_ib_alloc_ucontext; 407 us_ibdev->ib_dev.dealloc_ucontext = usnic_ib_dealloc_ucontext; 408 us_ibdev->ib_dev.mmap = usnic_ib_mmap; 409 us_ibdev->ib_dev.create_ah = usnic_ib_create_ah; 410 us_ibdev->ib_dev.destroy_ah = usnic_ib_destroy_ah; 411 us_ibdev->ib_dev.post_send = usnic_ib_post_send; 412 us_ibdev->ib_dev.post_recv = usnic_ib_post_recv; 413 us_ibdev->ib_dev.poll_cq = usnic_ib_poll_cq; 414 us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq; 415 us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr; 416 us_ibdev->ib_dev.get_port_immutable = usnic_port_immutable; 417 418 419 if (ib_register_device(&us_ibdev->ib_dev, NULL)) 420 goto err_fwd_dealloc; 421 422 usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu); 423 usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr); 424 if (netif_carrier_ok(us_ibdev->netdev)) 425 usnic_fwd_carrier_up(us_ibdev->ufdev); 426 427 in = ((struct in_device *)(netdev->ip_ptr))->ifa_list; 428 if (in != NULL) 429 usnic_fwd_add_ipaddr(us_ibdev->ufdev, in->ifa_address); 430 431 usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr, 432 us_ibdev->ufdev->inaddr, &gid.raw[0]); 433 memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id, 434 sizeof(gid.global.interface_id)); 435 kref_init(&us_ibdev->vf_cnt); 436 437 usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n", 438 us_ibdev->ib_dev.name, netdev_name(us_ibdev->netdev), 439 us_ibdev->ufdev->mac, us_ibdev->ufdev->link_up, 440 us_ibdev->ufdev->mtu); 441 return us_ibdev; 442 443 err_fwd_dealloc: 444 usnic_fwd_dev_free(us_ibdev->ufdev); 445 err_dealloc: 446 usnic_err("failed -- deallocing device\n"); 447 ib_dealloc_device(&us_ibdev->ib_dev); 448 return NULL; 449 } 450 451 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev) 452 { 453 usnic_info("Unregistering %s\n", us_ibdev->ib_dev.name); 454 usnic_ib_sysfs_unregister_usdev(us_ibdev); 455 usnic_fwd_dev_free(us_ibdev->ufdev); 456 ib_unregister_device(&us_ibdev->ib_dev); 457 ib_dealloc_device(&us_ibdev->ib_dev); 458 } 459 460 static void usnic_ib_undiscover_pf(struct kref *kref) 461 { 462 struct usnic_ib_dev *us_ibdev, *tmp; 463 struct pci_dev *dev; 464 bool found = false; 465 466 dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev; 467 mutex_lock(&usnic_ib_ibdev_list_lock); 468 list_for_each_entry_safe(us_ibdev, tmp, 469 &usnic_ib_ibdev_list, ib_dev_link) { 470 if (us_ibdev->pdev == dev) { 471 list_del(&us_ibdev->ib_dev_link); 472 usnic_ib_device_remove(us_ibdev); 473 found = true; 474 break; 475 } 476 } 477 478 WARN(!found, "Failed to remove PF %s\n", pci_name(dev)); 479 480 mutex_unlock(&usnic_ib_ibdev_list_lock); 481 } 482 483 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic) 484 { 485 struct usnic_ib_dev *us_ibdev; 486 struct pci_dev *parent_pci, *vf_pci; 487 int err; 488 489 vf_pci = usnic_vnic_get_pdev(vnic); 490 parent_pci = pci_physfn(vf_pci); 491 492 BUG_ON(!parent_pci); 493 494 mutex_lock(&usnic_ib_ibdev_list_lock); 495 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 496 if (us_ibdev->pdev == parent_pci) { 497 kref_get(&us_ibdev->vf_cnt); 498 goto out; 499 } 500 } 501 502 us_ibdev = usnic_ib_device_add(parent_pci); 503 if (IS_ERR_OR_NULL(us_ibdev)) { 504 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT); 505 goto out; 506 } 507 508 err = usnic_ib_sysfs_register_usdev(us_ibdev); 509 if (err) { 510 usnic_ib_device_remove(us_ibdev); 511 us_ibdev = ERR_PTR(err); 512 goto out; 513 } 514 515 list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list); 516 out: 517 mutex_unlock(&usnic_ib_ibdev_list_lock); 518 return us_ibdev; 519 } 520 /* End of PF discovery section */ 521 522 /* Start of PCI section */ 523 524 static const struct pci_device_id usnic_ib_pci_ids[] = { 525 {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)}, 526 {0,} 527 }; 528 529 static int usnic_ib_pci_probe(struct pci_dev *pdev, 530 const struct pci_device_id *id) 531 { 532 int err; 533 struct usnic_ib_dev *pf; 534 struct usnic_ib_vf *vf; 535 enum usnic_vnic_res_type res_type; 536 537 vf = kzalloc(sizeof(*vf), GFP_KERNEL); 538 if (!vf) 539 return -ENOMEM; 540 541 err = pci_enable_device(pdev); 542 if (err) { 543 usnic_err("Failed to enable %s with err %d\n", 544 pci_name(pdev), err); 545 goto out_clean_vf; 546 } 547 548 err = pci_request_regions(pdev, DRV_NAME); 549 if (err) { 550 usnic_err("Failed to request region for %s with err %d\n", 551 pci_name(pdev), err); 552 goto out_disable_device; 553 } 554 555 pci_set_master(pdev); 556 pci_set_drvdata(pdev, vf); 557 558 vf->vnic = usnic_vnic_alloc(pdev); 559 if (IS_ERR_OR_NULL(vf->vnic)) { 560 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM; 561 usnic_err("Failed to alloc vnic for %s with err %d\n", 562 pci_name(pdev), err); 563 goto out_release_regions; 564 } 565 566 pf = usnic_ib_discover_pf(vf->vnic); 567 if (IS_ERR_OR_NULL(pf)) { 568 usnic_err("Failed to discover pf of vnic %s with err%ld\n", 569 pci_name(pdev), PTR_ERR(pf)); 570 err = pf ? PTR_ERR(pf) : -EFAULT; 571 goto out_clean_vnic; 572 } 573 574 vf->pf = pf; 575 spin_lock_init(&vf->lock); 576 mutex_lock(&pf->usdev_lock); 577 list_add_tail(&vf->link, &pf->vf_dev_list); 578 /* 579 * Save max settings (will be same for each VF, easier to re-write than 580 * to say "if (!set) { set_values(); set=1; } 581 */ 582 for (res_type = USNIC_VNIC_RES_TYPE_EOL+1; 583 res_type < USNIC_VNIC_RES_TYPE_MAX; 584 res_type++) { 585 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic, 586 res_type); 587 } 588 589 mutex_unlock(&pf->usdev_lock); 590 591 usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev), 592 pf->ib_dev.name); 593 usnic_ib_log_vf(vf); 594 return 0; 595 596 out_clean_vnic: 597 usnic_vnic_free(vf->vnic); 598 out_release_regions: 599 pci_set_drvdata(pdev, NULL); 600 pci_clear_master(pdev); 601 pci_release_regions(pdev); 602 out_disable_device: 603 pci_disable_device(pdev); 604 out_clean_vf: 605 kfree(vf); 606 return err; 607 } 608 609 static void usnic_ib_pci_remove(struct pci_dev *pdev) 610 { 611 struct usnic_ib_vf *vf = pci_get_drvdata(pdev); 612 struct usnic_ib_dev *pf = vf->pf; 613 614 mutex_lock(&pf->usdev_lock); 615 list_del(&vf->link); 616 mutex_unlock(&pf->usdev_lock); 617 618 kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf); 619 usnic_vnic_free(vf->vnic); 620 pci_set_drvdata(pdev, NULL); 621 pci_clear_master(pdev); 622 pci_release_regions(pdev); 623 pci_disable_device(pdev); 624 kfree(vf); 625 626 usnic_info("Removed VF %s\n", pci_name(pdev)); 627 } 628 629 /* PCI driver entry points */ 630 static struct pci_driver usnic_ib_pci_driver = { 631 .name = DRV_NAME, 632 .id_table = usnic_ib_pci_ids, 633 .probe = usnic_ib_pci_probe, 634 .remove = usnic_ib_pci_remove, 635 }; 636 /* End of PCI section */ 637 638 /* Start of module section */ 639 static int __init usnic_ib_init(void) 640 { 641 int err; 642 643 printk_once(KERN_INFO "%s", usnic_version); 644 645 err = usnic_uiom_init(DRV_NAME); 646 if (err) { 647 usnic_err("Unable to initalize umem with err %d\n", err); 648 return err; 649 } 650 651 if (pci_register_driver(&usnic_ib_pci_driver)) { 652 usnic_err("Unable to register with PCI\n"); 653 goto out_umem_fini; 654 } 655 656 err = register_netdevice_notifier(&usnic_ib_netdevice_notifier); 657 if (err) { 658 usnic_err("Failed to register netdev notifier\n"); 659 goto out_pci_unreg; 660 } 661 662 err = register_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 663 if (err) { 664 usnic_err("Failed to register inet addr notifier\n"); 665 goto out_unreg_netdev_notifier; 666 } 667 668 err = usnic_transport_init(); 669 if (err) { 670 usnic_err("Failed to initialize transport\n"); 671 goto out_unreg_inetaddr_notifier; 672 } 673 674 usnic_debugfs_init(); 675 676 return 0; 677 678 out_unreg_inetaddr_notifier: 679 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 680 out_unreg_netdev_notifier: 681 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 682 out_pci_unreg: 683 pci_unregister_driver(&usnic_ib_pci_driver); 684 out_umem_fini: 685 usnic_uiom_fini(); 686 687 return err; 688 } 689 690 static void __exit usnic_ib_destroy(void) 691 { 692 usnic_dbg("\n"); 693 usnic_debugfs_exit(); 694 usnic_transport_fini(); 695 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 696 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 697 pci_unregister_driver(&usnic_ib_pci_driver); 698 usnic_uiom_fini(); 699 } 700 701 MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver"); 702 MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>"); 703 MODULE_LICENSE("Dual BSD/GPL"); 704 MODULE_VERSION(DRV_VERSION); 705 module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR); 706 module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR); 707 MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3"); 708 MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs"); 709 MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids); 710 711 module_init(usnic_ib_init); 712 module_exit(usnic_ib_destroy); 713 /* End of module section */ 714