drivers/infiniband/hw/usnic/usnic_ib_main.c

   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 ", dev_name(&vf->pf->ib_dev.dev));
  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 = kzalloc(1000, GFP_KERNEL);
  93
  94         if (!buf)
  95                 return;
  96
  97         usnic_ib_dump_vf(vf, buf, 1000);
  98         usnic_dbg("%s\n", buf);
  99
 100         kfree(buf);
 101 }
 102
 103 /* Start of netdev section */
 104 static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev)
 105 {
 106         struct usnic_ib_ucontext *ctx;
 107         struct usnic_ib_qp_grp *qp_grp;
 108         enum ib_qp_state cur_state;
 109         int status;
 110
 111         BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
 112
 113         list_for_each_entry(ctx, &us_ibdev->ctx_list, link) {
 114                 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) {
 115                         cur_state = qp_grp->state;
 116                         if (cur_state == IB_QPS_INIT ||
 117                                 cur_state == IB_QPS_RTR ||
 118                                 cur_state == IB_QPS_RTS) {
 119                                 status = usnic_ib_qp_grp_modify(qp_grp,
 120                                                                 IB_QPS_ERR,
 121                                                                 NULL);
 122                                 if (status) {
 123                                         usnic_err("Failed to transition qp grp %u from %s to %s\n",
 124                                                 qp_grp->grp_id,
 125                                                 usnic_ib_qp_grp_state_to_string
 126                                                 (cur_state),
 127                                                 usnic_ib_qp_grp_state_to_string
 128                                                 (IB_QPS_ERR));
 129                                 }
 130                         }
 131                 }
 132         }
 133 }
 134
 135 static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev,
 136                                         unsigned long event)
 137 {
 138         struct net_device *netdev;
 139         struct ib_event ib_event;
 140
 141         memset(&ib_event, 0, sizeof(ib_event));
 142
 143         mutex_lock(&us_ibdev->usdev_lock);
 144         netdev = us_ibdev->netdev;
 145         switch (event) {
 146         case NETDEV_REBOOT:
 147                 usnic_info("PF Reset on %s\n", dev_name(&us_ibdev->ib_dev.dev));
 148                 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 149                 ib_event.event = IB_EVENT_PORT_ERR;
 150                 ib_event.device = &us_ibdev->ib_dev;
 151                 ib_event.element.port_num = 1;
 152                 ib_dispatch_event(&ib_event);
 153                 break;
 154         case NETDEV_UP:
 155         case NETDEV_DOWN:
 156         case NETDEV_CHANGE:
 157                 if (!us_ibdev->ufdev->link_up &&
 158                                 netif_carrier_ok(netdev)) {
 159                         usnic_fwd_carrier_up(us_ibdev->ufdev);
 160                         usnic_info("Link UP on %s\n",
 161                                    dev_name(&us_ibdev->ib_dev.dev));
 162                         ib_event.event = IB_EVENT_PORT_ACTIVE;
 163                         ib_event.device = &us_ibdev->ib_dev;
 164                         ib_event.element.port_num = 1;
 165                         ib_dispatch_event(&ib_event);
 166                 } else if (us_ibdev->ufdev->link_up &&
 167                                 !netif_carrier_ok(netdev)) {
 168                         usnic_fwd_carrier_down(us_ibdev->ufdev);
 169                         usnic_info("Link DOWN on %s\n",
 170                                    dev_name(&us_ibdev->ib_dev.dev));
 171                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 172                         ib_event.event = IB_EVENT_PORT_ERR;
 173                         ib_event.device = &us_ibdev->ib_dev;
 174                         ib_event.element.port_num = 1;
 175                         ib_dispatch_event(&ib_event);
 176                 } else {
 177                         usnic_dbg("Ignoring %s on %s\n",
 178                                         netdev_cmd_to_name(event),
 179                                         dev_name(&us_ibdev->ib_dev.dev));
 180                 }
 181                 break;
 182         case NETDEV_CHANGEADDR:
 183                 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr,
 184                                 sizeof(us_ibdev->ufdev->mac))) {
 185                         usnic_dbg("Ignoring addr change on %s\n",
 186                                   dev_name(&us_ibdev->ib_dev.dev));
 187                 } else {
 188                         usnic_info(" %s old mac: %pM new mac: %pM\n",
 189                                         dev_name(&us_ibdev->ib_dev.dev),
 190                                         us_ibdev->ufdev->mac,
 191                                         netdev->dev_addr);
 192                         usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr);
 193                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 194                         ib_event.event = IB_EVENT_GID_CHANGE;
 195                         ib_event.device = &us_ibdev->ib_dev;
 196                         ib_event.element.port_num = 1;
 197                         ib_dispatch_event(&ib_event);
 198                 }
 199
 200                 break;
 201         case NETDEV_CHANGEMTU:
 202                 if (us_ibdev->ufdev->mtu != netdev->mtu) {
 203                         usnic_info("MTU Change on %s old: %u new: %u\n",
 204                                         dev_name(&us_ibdev->ib_dev.dev),
 205                                         us_ibdev->ufdev->mtu, netdev->mtu);
 206                         usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu);
 207                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 208                 } else {
 209                         usnic_dbg("Ignoring MTU change on %s\n",
 210                                   dev_name(&us_ibdev->ib_dev.dev));
 211                 }
 212                 break;
 213         default:
 214                 usnic_dbg("Ignoring event %s on %s",
 215                                 netdev_cmd_to_name(event),
 216                                 dev_name(&us_ibdev->ib_dev.dev));
 217         }
 218         mutex_unlock(&us_ibdev->usdev_lock);
 219 }
 220
 221 static int usnic_ib_netdevice_event(struct notifier_block *notifier,
 222                                         unsigned long event, void *ptr)
 223 {
 224         struct usnic_ib_dev *us_ibdev;
 225         struct ib_device *ibdev;
 226
 227         struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
 228
 229         ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_USNIC);
 230         if (!ibdev)
 231                 return NOTIFY_DONE;
 232
 233         us_ibdev = container_of(ibdev, struct usnic_ib_dev, ib_dev);
 234         usnic_ib_handle_usdev_event(us_ibdev, event);
 235         ib_device_put(ibdev);
 236         return NOTIFY_DONE;
 237 }
 238
 239 static struct notifier_block usnic_ib_netdevice_notifier = {
 240         .notifier_call = usnic_ib_netdevice_event
 241 };
 242 /* End of netdev section */
 243
 244 /* Start of inet section */
 245 static int usnic_ib_handle_inet_event(struct usnic_ib_dev *us_ibdev,
 246                                         unsigned long event, void *ptr)
 247 {
 248         struct in_ifaddr *ifa = ptr;
 249         struct ib_event ib_event;
 250
 251         mutex_lock(&us_ibdev->usdev_lock);
 252
 253         switch (event) {
 254         case NETDEV_DOWN:
 255                 usnic_info("%s via ip notifiers",
 256                                 netdev_cmd_to_name(event));
 257                 usnic_fwd_del_ipaddr(us_ibdev->ufdev);
 258                 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 259                 ib_event.event = IB_EVENT_GID_CHANGE;
 260                 ib_event.device = &us_ibdev->ib_dev;
 261                 ib_event.element.port_num = 1;
 262                 ib_dispatch_event(&ib_event);
 263                 break;
 264         case NETDEV_UP:
 265                 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address);
 266                 usnic_info("%s via ip notifiers: ip %pI4",
 267                                 netdev_cmd_to_name(event),
 268                                 &us_ibdev->ufdev->inaddr);
 269                 ib_event.event = IB_EVENT_GID_CHANGE;
 270                 ib_event.device = &us_ibdev->ib_dev;
 271                 ib_event.element.port_num = 1;
 272                 ib_dispatch_event(&ib_event);
 273                 break;
 274         default:
 275                 usnic_info("Ignoring event %s on %s",
 276                                 netdev_cmd_to_name(event),
 277                                 dev_name(&us_ibdev->ib_dev.dev));
 278         }
 279         mutex_unlock(&us_ibdev->usdev_lock);
 280
 281         return NOTIFY_DONE;
 282 }
 283
 284 static int usnic_ib_inetaddr_event(struct notifier_block *notifier,
 285                                         unsigned long event, void *ptr)
 286 {
 287         struct usnic_ib_dev *us_ibdev;
 288         struct in_ifaddr *ifa = ptr;
 289         struct net_device *netdev = ifa->ifa_dev->dev;
 290         struct ib_device *ibdev;
 291
 292         ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_USNIC);
 293         if (!ibdev)
 294                 return NOTIFY_DONE;
 295
 296         us_ibdev = container_of(ibdev, struct usnic_ib_dev, ib_dev);
 297         usnic_ib_handle_inet_event(us_ibdev, event, ptr);
 298         ib_device_put(ibdev);
 299         return NOTIFY_DONE;
 300 }
 301 static struct notifier_block usnic_ib_inetaddr_notifier = {
 302         .notifier_call = usnic_ib_inetaddr_event
 303 };
 304 /* End of inet section*/
 305
 306 static int usnic_port_immutable(struct ib_device *ibdev, u32 port_num,
 307                                 struct ib_port_immutable *immutable)
 308 {
 309         struct ib_port_attr attr;
 310         int err;
 311
 312         immutable->core_cap_flags = RDMA_CORE_PORT_USNIC;
 313
 314         err = ib_query_port(ibdev, port_num, &attr);
 315         if (err)
 316                 return err;
 317
 318         immutable->gid_tbl_len = attr.gid_tbl_len;
 319
 320         return 0;
 321 }
 322
 323 static void usnic_get_dev_fw_str(struct ib_device *device, char *str)
 324 {
 325         struct usnic_ib_dev *us_ibdev =
 326                 container_of(device, struct usnic_ib_dev, ib_dev);
 327         struct ethtool_drvinfo info;
 328
 329         mutex_lock(&us_ibdev->usdev_lock);
 330         us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
 331         mutex_unlock(&us_ibdev->usdev_lock);
 332
 333         snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", info.fw_version);
 334 }
 335
 336 static const struct ib_device_ops usnic_dev_ops = {
 337         .owner = THIS_MODULE,
 338         .driver_id = RDMA_DRIVER_USNIC,
 339         .uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION,
 340
 341         .alloc_pd = usnic_ib_alloc_pd,
 342         .alloc_ucontext = usnic_ib_alloc_ucontext,
 343         .create_cq = usnic_ib_create_cq,
 344         .create_qp = usnic_ib_create_qp,
 345         .dealloc_pd = usnic_ib_dealloc_pd,
 346         .dealloc_ucontext = usnic_ib_dealloc_ucontext,
 347         .dereg_mr = usnic_ib_dereg_mr,
 348         .destroy_cq = usnic_ib_destroy_cq,
 349         .destroy_qp = usnic_ib_destroy_qp,
 350         .device_group = &usnic_attr_group,
 351         .get_dev_fw_str = usnic_get_dev_fw_str,
 352         .get_link_layer = usnic_ib_port_link_layer,
 353         .get_port_immutable = usnic_port_immutable,
 354         .mmap = usnic_ib_mmap,
 355         .modify_qp = usnic_ib_modify_qp,
 356         .query_device = usnic_ib_query_device,
 357         .query_gid = usnic_ib_query_gid,
 358         .query_port = usnic_ib_query_port,
 359         .query_qp = usnic_ib_query_qp,
 360         .reg_user_mr = usnic_ib_reg_mr,
 361         INIT_RDMA_OBJ_SIZE(ib_pd, usnic_ib_pd, ibpd),
 362         INIT_RDMA_OBJ_SIZE(ib_cq, usnic_ib_cq, ibcq),
 363         INIT_RDMA_OBJ_SIZE(ib_ucontext, usnic_ib_ucontext, ibucontext),
 364 };
 365
 366 /* Start of PF discovery section */
 367 static void *usnic_ib_device_add(struct pci_dev *dev)
 368 {
 369         struct usnic_ib_dev *us_ibdev;
 370         union ib_gid gid;
 371         struct in_device *ind;
 372         struct net_device *netdev;
 373         int ret;
 374
 375         usnic_dbg("\n");
 376         netdev = pci_get_drvdata(dev);
 377
 378         us_ibdev = ib_alloc_device(usnic_ib_dev, ib_dev);
 379         if (!us_ibdev) {
 380                 usnic_err("Device %s context alloc failed\n",
 381                                 netdev_name(pci_get_drvdata(dev)));
 382                 return ERR_PTR(-EFAULT);
 383         }
 384
 385         us_ibdev->ufdev = usnic_fwd_dev_alloc(dev);
 386         if (!us_ibdev->ufdev) {
 387                 usnic_err("Failed to alloc ufdev for %s\n", pci_name(dev));
 388                 goto err_dealloc;
 389         }
 390
 391         mutex_init(&us_ibdev->usdev_lock);
 392         INIT_LIST_HEAD(&us_ibdev->vf_dev_list);
 393         INIT_LIST_HEAD(&us_ibdev->ctx_list);
 394
 395         us_ibdev->pdev = dev;
 396         us_ibdev->netdev = pci_get_drvdata(dev);
 397         us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP;
 398         us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT;
 399         us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS;
 400         us_ibdev->ib_dev.dev.parent = &dev->dev;
 401
 402         ib_set_device_ops(&us_ibdev->ib_dev, &usnic_dev_ops);
 403
 404         ret = ib_device_set_netdev(&us_ibdev->ib_dev, us_ibdev->netdev, 1);
 405         if (ret)
 406                 goto err_fwd_dealloc;
 407
 408         dma_set_max_seg_size(&dev->dev, SZ_2G);
 409         if (ib_register_device(&us_ibdev->ib_dev, "usnic_%d", &dev->dev))
 410                 goto err_fwd_dealloc;
 411
 412         usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu);
 413         usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr);
 414         if (netif_carrier_ok(us_ibdev->netdev))
 415                 usnic_fwd_carrier_up(us_ibdev->ufdev);
 416
 417         rcu_read_lock();
 418         ind = __in_dev_get_rcu(netdev);
 419         if (ind) {
 420                 const struct in_ifaddr *ifa;
 421
 422                 ifa = rcu_dereference(ind->ifa_list);
 423                 if (ifa)
 424                         usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address);
 425         }
 426         rcu_read_unlock();
 427
 428         usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr,
 429                                 us_ibdev->ufdev->inaddr, &gid.raw[0]);
 430         memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id,
 431                 sizeof(gid.global.interface_id));
 432         kref_init(&us_ibdev->vf_cnt);
 433
 434         usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n",
 435                    dev_name(&us_ibdev->ib_dev.dev),
 436                    netdev_name(us_ibdev->netdev), us_ibdev->ufdev->mac,
 437                    us_ibdev->ufdev->link_up, us_ibdev->ufdev->mtu);
 438         return us_ibdev;
 439
 440 err_fwd_dealloc:
 441         usnic_fwd_dev_free(us_ibdev->ufdev);
 442 err_dealloc:
 443         usnic_err("failed -- deallocing device\n");
 444         ib_dealloc_device(&us_ibdev->ib_dev);
 445         return NULL;
 446 }
 447
 448 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev)
 449 {
 450         usnic_info("Unregistering %s\n", dev_name(&us_ibdev->ib_dev.dev));
 451         usnic_ib_sysfs_unregister_usdev(us_ibdev);
 452         usnic_fwd_dev_free(us_ibdev->ufdev);
 453         ib_unregister_device(&us_ibdev->ib_dev);
 454         ib_dealloc_device(&us_ibdev->ib_dev);
 455 }
 456
 457 static void usnic_ib_undiscover_pf(struct kref *kref)
 458 {
 459         struct usnic_ib_dev *us_ibdev, *tmp;
 460         struct pci_dev *dev;
 461         bool found = false;
 462
 463         dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev;
 464         mutex_lock(&usnic_ib_ibdev_list_lock);
 465         list_for_each_entry_safe(us_ibdev, tmp,
 466                                 &usnic_ib_ibdev_list, ib_dev_link) {
 467                 if (us_ibdev->pdev == dev) {
 468                         list_del(&us_ibdev->ib_dev_link);
 469                         found = true;
 470                         break;
 471                 }
 472         }
 473
 474
 475         mutex_unlock(&usnic_ib_ibdev_list_lock);
 476         if (found)
 477                 usnic_ib_device_remove(us_ibdev);
 478         else
 479                 WARN(1, "Failed to remove PF %s\n", pci_name(dev));
 480 }
 481
 482 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic)
 483 {
 484         struct usnic_ib_dev *us_ibdev;
 485         struct pci_dev *parent_pci, *vf_pci;
 486         int err;
 487
 488         vf_pci = usnic_vnic_get_pdev(vnic);
 489         parent_pci = pci_physfn(vf_pci);
 490
 491         BUG_ON(!parent_pci);
 492
 493         mutex_lock(&usnic_ib_ibdev_list_lock);
 494         list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
 495                 if (us_ibdev->pdev == parent_pci) {
 496                         kref_get(&us_ibdev->vf_cnt);
 497                         goto out;
 498                 }
 499         }
 500
 501         us_ibdev = usnic_ib_device_add(parent_pci);
 502         if (IS_ERR_OR_NULL(us_ibdev)) {
 503                 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT);
 504                 goto out;
 505         }
 506
 507         err = usnic_ib_sysfs_register_usdev(us_ibdev);
 508         if (err) {
 509                 usnic_ib_device_remove(us_ibdev);
 510                 us_ibdev = ERR_PTR(err);
 511                 goto out;
 512         }
 513
 514         list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list);
 515 out:
 516         mutex_unlock(&usnic_ib_ibdev_list_lock);
 517         return us_ibdev;
 518 }
 519 /* End of PF discovery section */
 520
 521 /* Start of PCI section */
 522
 523 static const struct pci_device_id usnic_ib_pci_ids[] = {
 524         {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)},
 525         {0,}
 526 };
 527
 528 static int usnic_ib_pci_probe(struct pci_dev *pdev,
 529                                 const struct pci_device_id *id)
 530 {
 531         int err;
 532         struct usnic_ib_dev *pf;
 533         struct usnic_ib_vf *vf;
 534         enum usnic_vnic_res_type res_type;
 535
 536         vf = kzalloc(sizeof(*vf), GFP_KERNEL);
 537         if (!vf)
 538                 return -ENOMEM;
 539
 540         err = pci_enable_device(pdev);
 541         if (err) {
 542                 usnic_err("Failed to enable %s with err %d\n",
 543                                 pci_name(pdev), err);
 544                 goto out_clean_vf;
 545         }
 546
 547         err = pci_request_regions(pdev, DRV_NAME);
 548         if (err) {
 549                 usnic_err("Failed to request region for %s with err %d\n",
 550                                 pci_name(pdev), err);
 551                 goto out_disable_device;
 552         }
 553
 554         pci_set_master(pdev);
 555         pci_set_drvdata(pdev, vf);
 556
 557         vf->vnic = usnic_vnic_alloc(pdev);
 558         if (IS_ERR_OR_NULL(vf->vnic)) {
 559                 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM;
 560                 usnic_err("Failed to alloc vnic for %s with err %d\n",
 561                                 pci_name(pdev), err);
 562                 goto out_release_regions;
 563         }
 564
 565         pf = usnic_ib_discover_pf(vf->vnic);
 566         if (IS_ERR_OR_NULL(pf)) {
 567                 usnic_err("Failed to discover pf of vnic %s with err%ld\n",
 568                                 pci_name(pdev), PTR_ERR(pf));
 569                 err = pf ? PTR_ERR(pf) : -EFAULT;
 570                 goto out_clean_vnic;
 571         }
 572
 573         vf->pf = pf;
 574         spin_lock_init(&vf->lock);
 575         mutex_lock(&pf->usdev_lock);
 576         list_add_tail(&vf->link, &pf->vf_dev_list);
 577         /*
 578          * Save max settings (will be same for each VF, easier to re-write than
 579          * to say "if (!set) { set_values(); set=1; }
 580          */
 581         for (res_type = USNIC_VNIC_RES_TYPE_EOL+1;
 582                         res_type < USNIC_VNIC_RES_TYPE_MAX;
 583                         res_type++) {
 584                 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic,
 585                                                                 res_type);
 586         }
 587
 588         mutex_unlock(&pf->usdev_lock);
 589
 590         usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev),
 591                    dev_name(&pf->ib_dev.dev));
 592         usnic_ib_log_vf(vf);
 593         return 0;
 594
 595 out_clean_vnic:
 596         usnic_vnic_free(vf->vnic);
 597 out_release_regions:
 598         pci_set_drvdata(pdev, NULL);
 599         pci_clear_master(pdev);
 600         pci_release_regions(pdev);
 601 out_disable_device:
 602         pci_disable_device(pdev);
 603 out_clean_vf:
 604         kfree(vf);
 605         return err;
 606 }
 607
 608 static void usnic_ib_pci_remove(struct pci_dev *pdev)
 609 {
 610         struct usnic_ib_vf *vf = pci_get_drvdata(pdev);
 611         struct usnic_ib_dev *pf = vf->pf;
 612
 613         mutex_lock(&pf->usdev_lock);
 614         list_del(&vf->link);
 615         mutex_unlock(&pf->usdev_lock);
 616
 617         kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf);
 618         usnic_vnic_free(vf->vnic);
 619         pci_set_drvdata(pdev, NULL);
 620         pci_clear_master(pdev);
 621         pci_release_regions(pdev);
 622         pci_disable_device(pdev);
 623         kfree(vf);
 624
 625         usnic_info("Removed VF %s\n", pci_name(pdev));
 626 }
 627
 628 /* PCI driver entry points */
 629 static struct pci_driver usnic_ib_pci_driver = {
 630         .name = DRV_NAME,
 631         .id_table = usnic_ib_pci_ids,
 632         .probe = usnic_ib_pci_probe,
 633         .remove = usnic_ib_pci_remove,
 634 };
 635 /* End of PCI section */
 636
 637 /* Start of module section */
 638 static int __init usnic_ib_init(void)
 639 {
 640         int err;
 641
 642         printk_once(KERN_INFO "%s", usnic_version);
 643
 644         err = usnic_uiom_init(DRV_NAME);
 645         if (err) {
 646                 usnic_err("Unable to initialize umem with err %d\n", err);
 647                 return err;
 648         }
 649
 650         err = pci_register_driver(&usnic_ib_pci_driver);
 651         if (err) {
 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
 686         return err;
 687 }
 688
 689 static void __exit usnic_ib_destroy(void)
 690 {
 691         usnic_dbg("\n");
 692         usnic_debugfs_exit();
 693         usnic_transport_fini();
 694         unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
 695         unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
 696         pci_unregister_driver(&usnic_ib_pci_driver);
 697 }
 698
 699 MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver");
 700 MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>");
 701 MODULE_LICENSE("Dual BSD/GPL");
 702 module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR);
 703 module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR);
 704 MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3");
 705 MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs");
 706 MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids);
 707
 708 module_init(usnic_ib_init);
 709 module_exit(usnic_ib_destroy);
 710 /* End of module section */