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 (IS_ERR_OR_NULL(us_ibdev)) { 347 usnic_err("Device %s context alloc failed\n", 348 netdev_name(pci_get_drvdata(dev))); 349 return ERR_PTR(us_ibdev ? PTR_ERR(us_ibdev) : -EFAULT); 350 } 351 352 us_ibdev->ufdev = usnic_fwd_dev_alloc(dev); 353 if (IS_ERR_OR_NULL(us_ibdev->ufdev)) { 354 usnic_err("Failed to alloc ufdev for %s with err %ld\n", 355 pci_name(dev), PTR_ERR(us_ibdev->ufdev)); 356 goto err_dealloc; 357 } 358 359 mutex_init(&us_ibdev->usdev_lock); 360 INIT_LIST_HEAD(&us_ibdev->vf_dev_list); 361 INIT_LIST_HEAD(&us_ibdev->ctx_list); 362 363 us_ibdev->pdev = dev; 364 us_ibdev->netdev = pci_get_drvdata(dev); 365 us_ibdev->ib_dev.owner = THIS_MODULE; 366 us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP; 367 us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT; 368 us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS; 369 us_ibdev->ib_dev.dma_device = &dev->dev; 370 us_ibdev->ib_dev.uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION; 371 strlcpy(us_ibdev->ib_dev.name, "usnic_%d", IB_DEVICE_NAME_MAX); 372 373 us_ibdev->ib_dev.uverbs_cmd_mask = 374 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 375 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 376 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 377 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 378 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 379 (1ull << IB_USER_VERBS_CMD_REG_MR) | 380 (1ull << IB_USER_VERBS_CMD_DEREG_MR) | 381 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) | 382 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) | 383 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) | 384 (1ull << IB_USER_VERBS_CMD_CREATE_QP) | 385 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) | 386 (1ull << IB_USER_VERBS_CMD_QUERY_QP) | 387 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 388 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) | 389 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) | 390 (1ull << IB_USER_VERBS_CMD_OPEN_QP); 391 392 us_ibdev->ib_dev.query_device = usnic_ib_query_device; 393 us_ibdev->ib_dev.query_port = usnic_ib_query_port; 394 us_ibdev->ib_dev.query_pkey = usnic_ib_query_pkey; 395 us_ibdev->ib_dev.query_gid = usnic_ib_query_gid; 396 us_ibdev->ib_dev.get_link_layer = usnic_ib_port_link_layer; 397 us_ibdev->ib_dev.alloc_pd = usnic_ib_alloc_pd; 398 us_ibdev->ib_dev.dealloc_pd = usnic_ib_dealloc_pd; 399 us_ibdev->ib_dev.create_qp = usnic_ib_create_qp; 400 us_ibdev->ib_dev.modify_qp = usnic_ib_modify_qp; 401 us_ibdev->ib_dev.query_qp = usnic_ib_query_qp; 402 us_ibdev->ib_dev.destroy_qp = usnic_ib_destroy_qp; 403 us_ibdev->ib_dev.create_cq = usnic_ib_create_cq; 404 us_ibdev->ib_dev.destroy_cq = usnic_ib_destroy_cq; 405 us_ibdev->ib_dev.reg_user_mr = usnic_ib_reg_mr; 406 us_ibdev->ib_dev.dereg_mr = usnic_ib_dereg_mr; 407 us_ibdev->ib_dev.alloc_ucontext = usnic_ib_alloc_ucontext; 408 us_ibdev->ib_dev.dealloc_ucontext = usnic_ib_dealloc_ucontext; 409 us_ibdev->ib_dev.mmap = usnic_ib_mmap; 410 us_ibdev->ib_dev.create_ah = usnic_ib_create_ah; 411 us_ibdev->ib_dev.destroy_ah = usnic_ib_destroy_ah; 412 us_ibdev->ib_dev.post_send = usnic_ib_post_send; 413 us_ibdev->ib_dev.post_recv = usnic_ib_post_recv; 414 us_ibdev->ib_dev.poll_cq = usnic_ib_poll_cq; 415 us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq; 416 us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr; 417 us_ibdev->ib_dev.get_port_immutable = usnic_port_immutable; 418 419 420 if (ib_register_device(&us_ibdev->ib_dev, NULL)) 421 goto err_fwd_dealloc; 422 423 usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu); 424 usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr); 425 if (netif_carrier_ok(us_ibdev->netdev)) 426 usnic_fwd_carrier_up(us_ibdev->ufdev); 427 428 in = ((struct in_device *)(netdev->ip_ptr))->ifa_list; 429 if (in != NULL) 430 usnic_fwd_add_ipaddr(us_ibdev->ufdev, in->ifa_address); 431 432 usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr, 433 us_ibdev->ufdev->inaddr, &gid.raw[0]); 434 memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id, 435 sizeof(gid.global.interface_id)); 436 kref_init(&us_ibdev->vf_cnt); 437 438 usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n", 439 us_ibdev->ib_dev.name, netdev_name(us_ibdev->netdev), 440 us_ibdev->ufdev->mac, us_ibdev->ufdev->link_up, 441 us_ibdev->ufdev->mtu); 442 return us_ibdev; 443 444 err_fwd_dealloc: 445 usnic_fwd_dev_free(us_ibdev->ufdev); 446 err_dealloc: 447 usnic_err("failed -- deallocing device\n"); 448 ib_dealloc_device(&us_ibdev->ib_dev); 449 return NULL; 450 } 451 452 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev) 453 { 454 usnic_info("Unregistering %s\n", us_ibdev->ib_dev.name); 455 usnic_ib_sysfs_unregister_usdev(us_ibdev); 456 usnic_fwd_dev_free(us_ibdev->ufdev); 457 ib_unregister_device(&us_ibdev->ib_dev); 458 ib_dealloc_device(&us_ibdev->ib_dev); 459 } 460 461 static void usnic_ib_undiscover_pf(struct kref *kref) 462 { 463 struct usnic_ib_dev *us_ibdev, *tmp; 464 struct pci_dev *dev; 465 bool found = false; 466 467 dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev; 468 mutex_lock(&usnic_ib_ibdev_list_lock); 469 list_for_each_entry_safe(us_ibdev, tmp, 470 &usnic_ib_ibdev_list, ib_dev_link) { 471 if (us_ibdev->pdev == dev) { 472 list_del(&us_ibdev->ib_dev_link); 473 usnic_ib_device_remove(us_ibdev); 474 found = true; 475 break; 476 } 477 } 478 479 WARN(!found, "Failed to remove PF %s\n", pci_name(dev)); 480 481 mutex_unlock(&usnic_ib_ibdev_list_lock); 482 } 483 484 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic) 485 { 486 struct usnic_ib_dev *us_ibdev; 487 struct pci_dev *parent_pci, *vf_pci; 488 int err; 489 490 vf_pci = usnic_vnic_get_pdev(vnic); 491 parent_pci = pci_physfn(vf_pci); 492 493 BUG_ON(!parent_pci); 494 495 mutex_lock(&usnic_ib_ibdev_list_lock); 496 list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) { 497 if (us_ibdev->pdev == parent_pci) { 498 kref_get(&us_ibdev->vf_cnt); 499 goto out; 500 } 501 } 502 503 us_ibdev = usnic_ib_device_add(parent_pci); 504 if (IS_ERR_OR_NULL(us_ibdev)) { 505 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT); 506 goto out; 507 } 508 509 err = usnic_ib_sysfs_register_usdev(us_ibdev); 510 if (err) { 511 usnic_ib_device_remove(us_ibdev); 512 us_ibdev = ERR_PTR(err); 513 goto out; 514 } 515 516 list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list); 517 out: 518 mutex_unlock(&usnic_ib_ibdev_list_lock); 519 return us_ibdev; 520 } 521 /* End of PF discovery section */ 522 523 /* Start of PCI section */ 524 525 static const struct pci_device_id usnic_ib_pci_ids[] = { 526 {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)}, 527 {0,} 528 }; 529 530 static int usnic_ib_pci_probe(struct pci_dev *pdev, 531 const struct pci_device_id *id) 532 { 533 int err; 534 struct usnic_ib_dev *pf; 535 struct usnic_ib_vf *vf; 536 enum usnic_vnic_res_type res_type; 537 538 vf = kzalloc(sizeof(*vf), GFP_KERNEL); 539 if (!vf) 540 return -ENOMEM; 541 542 err = pci_enable_device(pdev); 543 if (err) { 544 usnic_err("Failed to enable %s with err %d\n", 545 pci_name(pdev), err); 546 goto out_clean_vf; 547 } 548 549 err = pci_request_regions(pdev, DRV_NAME); 550 if (err) { 551 usnic_err("Failed to request region for %s with err %d\n", 552 pci_name(pdev), err); 553 goto out_disable_device; 554 } 555 556 pci_set_master(pdev); 557 pci_set_drvdata(pdev, vf); 558 559 vf->vnic = usnic_vnic_alloc(pdev); 560 if (IS_ERR_OR_NULL(vf->vnic)) { 561 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM; 562 usnic_err("Failed to alloc vnic for %s with err %d\n", 563 pci_name(pdev), err); 564 goto out_release_regions; 565 } 566 567 pf = usnic_ib_discover_pf(vf->vnic); 568 if (IS_ERR_OR_NULL(pf)) { 569 usnic_err("Failed to discover pf of vnic %s with err%ld\n", 570 pci_name(pdev), PTR_ERR(pf)); 571 err = pf ? PTR_ERR(pf) : -EFAULT; 572 goto out_clean_vnic; 573 } 574 575 vf->pf = pf; 576 spin_lock_init(&vf->lock); 577 mutex_lock(&pf->usdev_lock); 578 list_add_tail(&vf->link, &pf->vf_dev_list); 579 /* 580 * Save max settings (will be same for each VF, easier to re-write than 581 * to say "if (!set) { set_values(); set=1; } 582 */ 583 for (res_type = USNIC_VNIC_RES_TYPE_EOL+1; 584 res_type < USNIC_VNIC_RES_TYPE_MAX; 585 res_type++) { 586 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic, 587 res_type); 588 } 589 590 mutex_unlock(&pf->usdev_lock); 591 592 usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev), 593 pf->ib_dev.name); 594 usnic_ib_log_vf(vf); 595 return 0; 596 597 out_clean_vnic: 598 usnic_vnic_free(vf->vnic); 599 out_release_regions: 600 pci_set_drvdata(pdev, NULL); 601 pci_clear_master(pdev); 602 pci_release_regions(pdev); 603 out_disable_device: 604 pci_disable_device(pdev); 605 out_clean_vf: 606 kfree(vf); 607 return err; 608 } 609 610 static void usnic_ib_pci_remove(struct pci_dev *pdev) 611 { 612 struct usnic_ib_vf *vf = pci_get_drvdata(pdev); 613 struct usnic_ib_dev *pf = vf->pf; 614 615 mutex_lock(&pf->usdev_lock); 616 list_del(&vf->link); 617 mutex_unlock(&pf->usdev_lock); 618 619 kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf); 620 usnic_vnic_free(vf->vnic); 621 pci_set_drvdata(pdev, NULL); 622 pci_clear_master(pdev); 623 pci_release_regions(pdev); 624 pci_disable_device(pdev); 625 kfree(vf); 626 627 usnic_info("Removed VF %s\n", pci_name(pdev)); 628 } 629 630 /* PCI driver entry points */ 631 static struct pci_driver usnic_ib_pci_driver = { 632 .name = DRV_NAME, 633 .id_table = usnic_ib_pci_ids, 634 .probe = usnic_ib_pci_probe, 635 .remove = usnic_ib_pci_remove, 636 }; 637 /* End of PCI section */ 638 639 /* Start of module section */ 640 static int __init usnic_ib_init(void) 641 { 642 int err; 643 644 printk_once(KERN_INFO "%s", usnic_version); 645 646 err = usnic_uiom_init(DRV_NAME); 647 if (err) { 648 usnic_err("Unable to initalize umem with err %d\n", err); 649 return err; 650 } 651 652 if (pci_register_driver(&usnic_ib_pci_driver)) { 653 usnic_err("Unable to register with PCI\n"); 654 goto out_umem_fini; 655 } 656 657 err = register_netdevice_notifier(&usnic_ib_netdevice_notifier); 658 if (err) { 659 usnic_err("Failed to register netdev notifier\n"); 660 goto out_pci_unreg; 661 } 662 663 err = register_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 664 if (err) { 665 usnic_err("Failed to register inet addr notifier\n"); 666 goto out_unreg_netdev_notifier; 667 } 668 669 err = usnic_transport_init(); 670 if (err) { 671 usnic_err("Failed to initialize transport\n"); 672 goto out_unreg_inetaddr_notifier; 673 } 674 675 usnic_debugfs_init(); 676 677 return 0; 678 679 out_unreg_inetaddr_notifier: 680 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 681 out_unreg_netdev_notifier: 682 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 683 out_pci_unreg: 684 pci_unregister_driver(&usnic_ib_pci_driver); 685 out_umem_fini: 686 usnic_uiom_fini(); 687 688 return err; 689 } 690 691 static void __exit usnic_ib_destroy(void) 692 { 693 usnic_dbg("\n"); 694 usnic_debugfs_exit(); 695 usnic_transport_fini(); 696 unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier); 697 unregister_netdevice_notifier(&usnic_ib_netdevice_notifier); 698 pci_unregister_driver(&usnic_ib_pci_driver); 699 usnic_uiom_fini(); 700 } 701 702 MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver"); 703 MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>"); 704 MODULE_LICENSE("Dual BSD/GPL"); 705 MODULE_VERSION(DRV_VERSION); 706 module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR); 707 module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR); 708 MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3"); 709 MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs"); 710 MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids); 711 712 module_init(usnic_ib_init); 713 module_exit(usnic_ib_destroy); 714 /* End of module section */ 715