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