drivers/infiniband/hw/usnic/usnic_ib_main.c

   1 /*
   2  * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
   3  *
   4  * This program is free software; you may redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15  * SOFTWARE.
  16  *
  17  * Author: Upinder Malhi <umalhi@cisco.com>
  18  * Author: Anant Deepak <anadeepa@cisco.com>
  19  * Author: Cesare Cantu' <cantuc@cisco.com>
  20  * Author: Jeff Squyres <jsquyres@cisco.com>
  21  * Author: Kiran Thirumalai <kithirum@cisco.com>
  22  * Author: Xuyang Wang <xuywang@cisco.com>
  23  * Author: Reese Faucette <rfaucett@cisco.com>
  24  *
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/slab.h>
  30 #include <linux/errno.h>
  31 #include <linux/pci.h>
  32 #include <linux/netdevice.h>
  33
  34 #include <rdma/ib_user_verbs.h>
  35 #include <rdma/ib_addr.h>
  36
  37 #include "usnic_abi.h"
  38 #include "usnic_common_util.h"
  39 #include "usnic_ib.h"
  40 #include "usnic_ib_qp_grp.h"
  41 #include "usnic_log.h"
  42 #include "usnic_fwd.h"
  43 #include "usnic_debugfs.h"
  44 #include "usnic_ib_verbs.h"
  45 #include "usnic_transport.h"
  46 #include "usnic_uiom.h"
  47 #include "usnic_ib_sysfs.h"
  48
  49 unsigned int usnic_log_lvl = USNIC_LOG_LVL_ERR;
  50 unsigned int usnic_ib_share_vf = 1;
  51
  52 static const char usnic_version[] =
  53         DRV_NAME ": Cisco VIC (USNIC) Verbs Driver v"
  54         DRV_VERSION " (" DRV_RELDATE ")\n";
  55
  56 static DEFINE_MUTEX(usnic_ib_ibdev_list_lock);
  57 static LIST_HEAD(usnic_ib_ibdev_list);
  58
  59 /* Callback dump funcs */
  60 static int usnic_ib_dump_vf_hdr(void *obj, char *buf, int buf_sz)
  61 {
  62         struct usnic_ib_vf *vf = obj;
  63         return scnprintf(buf, buf_sz, "PF: %s ", vf->pf->ib_dev.name);
  64 }
  65 /* End callback dump funcs */
  66
  67 static void usnic_ib_dump_vf(struct usnic_ib_vf *vf, char *buf, int buf_sz)
  68 {
  69         usnic_vnic_dump(vf->vnic, buf, buf_sz, vf,
  70                         usnic_ib_dump_vf_hdr,
  71                         usnic_ib_qp_grp_dump_hdr, usnic_ib_qp_grp_dump_rows);
  72 }
  73
  74 void usnic_ib_log_vf(struct usnic_ib_vf *vf)
  75 {
  76         char buf[1000];
  77         usnic_ib_dump_vf(vf, buf, sizeof(buf));
  78         usnic_dbg("%s\n", buf);
  79 }
  80
  81 /* Start of netdev section */
  82 static inline const char *usnic_ib_netdev_event_to_string(unsigned long event)
  83 {
  84         const char *event2str[] = {"NETDEV_NONE", "NETDEV_UP", "NETDEV_DOWN",
  85                 "NETDEV_REBOOT", "NETDEV_CHANGE",
  86                 "NETDEV_REGISTER", "NETDEV_UNREGISTER", "NETDEV_CHANGEMTU",
  87                 "NETDEV_CHANGEADDR", "NETDEV_GOING_DOWN", "NETDEV_FEAT_CHANGE",
  88                 "NETDEV_BONDING_FAILOVER", "NETDEV_PRE_UP",
  89                 "NETDEV_PRE_TYPE_CHANGE", "NETDEV_POST_TYPE_CHANGE",
  90                 "NETDEV_POST_INT", "NETDEV_UNREGISTER_FINAL", "NETDEV_RELEASE",
  91                 "NETDEV_NOTIFY_PEERS", "NETDEV_JOIN"
  92         };
  93
  94         if (event >= ARRAY_SIZE(event2str))
  95                 return "UNKNOWN_NETDEV_EVENT";
  96         else
  97                 return event2str[event];
  98 }
  99
 100 static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev)
 101 {
 102         struct usnic_ib_ucontext *ctx;
 103         struct usnic_ib_qp_grp *qp_grp;
 104         enum ib_qp_state cur_state;
 105         int status;
 106
 107         BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
 108
 109         list_for_each_entry(ctx, &us_ibdev->ctx_list, link) {
 110                 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) {
 111                         cur_state = qp_grp->state;
 112                         if (cur_state == IB_QPS_INIT ||
 113                                 cur_state == IB_QPS_RTR ||
 114                                 cur_state == IB_QPS_RTS) {
 115                                 status = usnic_ib_qp_grp_modify(qp_grp,
 116                                                                 IB_QPS_ERR,
 117                                                                 NULL);
 118                                 if (status) {
 119                                         usnic_err("Failed to transistion qp grp %u from %s to %s\n",
 120                                                 qp_grp->grp_id,
 121                                                 usnic_ib_qp_grp_state_to_string
 122                                                 (cur_state),
 123                                                 usnic_ib_qp_grp_state_to_string
 124                                                 (IB_QPS_ERR));
 125                                 }
 126                         }
 127                 }
 128         }
 129 }
 130
 131 static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev,
 132                                         unsigned long event)
 133 {
 134         struct net_device *netdev;
 135         struct ib_event ib_event;
 136
 137         memset(&ib_event, 0, sizeof(ib_event));
 138
 139         mutex_lock(&us_ibdev->usdev_lock);
 140         netdev = us_ibdev->netdev;
 141         switch (event) {
 142         case NETDEV_REBOOT:
 143                 usnic_info("PF Reset on %s\n", us_ibdev->ib_dev.name);
 144                 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 145                 ib_event.event = IB_EVENT_PORT_ERR;
 146                 ib_event.device = &us_ibdev->ib_dev;
 147                 ib_event.element.port_num = 1;
 148                 ib_dispatch_event(&ib_event);
 149                 break;
 150         case NETDEV_UP:
 151         case NETDEV_DOWN:
 152         case NETDEV_CHANGE:
 153                 if (!us_ibdev->ufdev->link_up &&
 154                                 netif_carrier_ok(netdev)) {
 155                         usnic_fwd_carrier_up(us_ibdev->ufdev);
 156                         usnic_info("Link UP on %s\n", us_ibdev->ib_dev.name);
 157                         ib_event.event = IB_EVENT_PORT_ACTIVE;
 158                         ib_event.device = &us_ibdev->ib_dev;
 159                         ib_event.element.port_num = 1;
 160                         ib_dispatch_event(&ib_event);
 161                 } else if (us_ibdev->ufdev->link_up &&
 162                                 !netif_carrier_ok(netdev)) {
 163                         usnic_fwd_carrier_down(us_ibdev->ufdev);
 164                         usnic_info("Link DOWN on %s\n", us_ibdev->ib_dev.name);
 165                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 166                         ib_event.event = IB_EVENT_PORT_ERR;
 167                         ib_event.device = &us_ibdev->ib_dev;
 168                         ib_event.element.port_num = 1;
 169                         ib_dispatch_event(&ib_event);
 170                 } else {
 171                         usnic_dbg("Ignorning %s on %s\n",
 172                                         usnic_ib_netdev_event_to_string(event),
 173                                         us_ibdev->ib_dev.name);
 174                 }
 175                 break;
 176         case NETDEV_CHANGEADDR:
 177                 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr,
 178                                 sizeof(us_ibdev->ufdev->mac))) {
 179                         usnic_dbg("Ignorning addr change on %s\n",
 180                                         us_ibdev->ib_dev.name);
 181                 } else {
 182                         usnic_info(" %s old mac: %pM new mac: %pM\n",
 183                                         us_ibdev->ib_dev.name,
 184                                         us_ibdev->ufdev->mac,
 185                                         netdev->dev_addr);
 186                         usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr);
 187                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 188                         ib_event.event = IB_EVENT_GID_CHANGE;
 189                         ib_event.device = &us_ibdev->ib_dev;
 190                         ib_event.element.port_num = 1;
 191                         ib_dispatch_event(&ib_event);
 192                 }
 193
 194                 break;
 195         case NETDEV_CHANGEMTU:
 196                 if (us_ibdev->ufdev->mtu != netdev->mtu) {
 197                         usnic_info("MTU Change on %s old: %u new: %u\n",
 198                                         us_ibdev->ib_dev.name,
 199                                         us_ibdev->ufdev->mtu, netdev->mtu);
 200                         usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu);
 201                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 202                 } else {
 203                         usnic_dbg("Ignoring MTU change on %s\n",
 204                                         us_ibdev->ib_dev.name);
 205                 }
 206                 break;
 207         default:
 208                 usnic_dbg("Ignorning event %s on %s",
 209                                 usnic_ib_netdev_event_to_string(event),
 210                                 us_ibdev->ib_dev.name);
 211         }
 212         mutex_unlock(&us_ibdev->usdev_lock);
 213 }
 214
 215 static int usnic_ib_netdevice_event(struct notifier_block *notifier,
 216                                         unsigned long event, void *ptr)
 217 {
 218         struct usnic_ib_dev *us_ibdev;
 219
 220         struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
 221
 222         mutex_lock(&usnic_ib_ibdev_list_lock);
 223         list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
 224                 if (us_ibdev->netdev == netdev) {
 225                         usnic_ib_handle_usdev_event(us_ibdev, event);
 226                         break;
 227                 }
 228         }
 229         mutex_unlock(&usnic_ib_ibdev_list_lock);
 230
 231         return NOTIFY_DONE;
 232 }
 233
 234 static struct notifier_block usnic_ib_netdevice_notifier = {
 235         .notifier_call = usnic_ib_netdevice_event
 236 };
 237 /* End of netdev section */
 238
 239 /* Start of PF discovery section */
 240 static void *usnic_ib_device_add(struct pci_dev *dev)
 241 {
 242         struct usnic_ib_dev *us_ibdev;
 243         union ib_gid gid;
 244
 245         usnic_dbg("\n");
 246
 247         us_ibdev = (struct usnic_ib_dev *)ib_alloc_device(sizeof(*us_ibdev));
 248         if (IS_ERR_OR_NULL(us_ibdev)) {
 249                 usnic_err("Device %s context alloc failed\n",
 250                                 netdev_name(pci_get_drvdata(dev)));
 251                 return ERR_PTR(us_ibdev ? PTR_ERR(us_ibdev) : -EFAULT);
 252         }
 253
 254         us_ibdev->ufdev = usnic_fwd_dev_alloc(dev);
 255         if (IS_ERR_OR_NULL(us_ibdev->ufdev)) {
 256                 usnic_err("Failed to alloc ufdev for %s with err %ld\n",
 257                                 pci_name(dev), PTR_ERR(us_ibdev->ufdev));
 258                 goto err_dealloc;
 259         }
 260
 261         mutex_init(&us_ibdev->usdev_lock);
 262         INIT_LIST_HEAD(&us_ibdev->vf_dev_list);
 263         INIT_LIST_HEAD(&us_ibdev->ctx_list);
 264
 265         us_ibdev->pdev = dev;
 266         us_ibdev->netdev = pci_get_drvdata(dev);
 267         us_ibdev->ib_dev.owner = THIS_MODULE;
 268         us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC;
 269         us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT;
 270         us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS;
 271         us_ibdev->ib_dev.dma_device = &dev->dev;
 272         us_ibdev->ib_dev.uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION;
 273         strlcpy(us_ibdev->ib_dev.name, "usnic_%d", IB_DEVICE_NAME_MAX);
 274
 275         us_ibdev->ib_dev.uverbs_cmd_mask =
 276                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
 277                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
 278                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
 279                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
 280                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
 281                 (1ull << IB_USER_VERBS_CMD_REG_MR) |
 282                 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
 283                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 284                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
 285                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
 286                 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
 287                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
 288                 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
 289                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
 290                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
 291                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
 292                 (1ull << IB_USER_VERBS_CMD_OPEN_QP);
 293
 294         us_ibdev->ib_dev.query_device = usnic_ib_query_device;
 295         us_ibdev->ib_dev.query_port = usnic_ib_query_port;
 296         us_ibdev->ib_dev.query_pkey = usnic_ib_query_pkey;
 297         us_ibdev->ib_dev.query_gid = usnic_ib_query_gid;
 298         us_ibdev->ib_dev.get_link_layer = usnic_ib_port_link_layer;
 299         us_ibdev->ib_dev.alloc_pd = usnic_ib_alloc_pd;
 300         us_ibdev->ib_dev.dealloc_pd = usnic_ib_dealloc_pd;
 301         us_ibdev->ib_dev.create_qp = usnic_ib_create_qp;
 302         us_ibdev->ib_dev.modify_qp = usnic_ib_modify_qp;
 303         us_ibdev->ib_dev.query_qp = usnic_ib_query_qp;
 304         us_ibdev->ib_dev.destroy_qp = usnic_ib_destroy_qp;
 305         us_ibdev->ib_dev.create_cq = usnic_ib_create_cq;
 306         us_ibdev->ib_dev.destroy_cq = usnic_ib_destroy_cq;
 307         us_ibdev->ib_dev.reg_user_mr = usnic_ib_reg_mr;
 308         us_ibdev->ib_dev.dereg_mr = usnic_ib_dereg_mr;
 309         us_ibdev->ib_dev.alloc_ucontext = usnic_ib_alloc_ucontext;
 310         us_ibdev->ib_dev.dealloc_ucontext = usnic_ib_dealloc_ucontext;
 311         us_ibdev->ib_dev.mmap = usnic_ib_mmap;
 312         us_ibdev->ib_dev.create_ah = usnic_ib_create_ah;
 313         us_ibdev->ib_dev.destroy_ah = usnic_ib_destroy_ah;
 314         us_ibdev->ib_dev.post_send = usnic_ib_post_send;
 315         us_ibdev->ib_dev.post_recv = usnic_ib_post_recv;
 316         us_ibdev->ib_dev.poll_cq = usnic_ib_poll_cq;
 317         us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq;
 318         us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr;
 319
 320
 321         if (ib_register_device(&us_ibdev->ib_dev, NULL))
 322                 goto err_fwd_dealloc;
 323
 324         usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu);
 325         usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr);
 326         if (netif_carrier_ok(us_ibdev->netdev))
 327                 usnic_fwd_carrier_up(us_ibdev->ufdev);
 328
 329         memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id,
 330                 sizeof(gid.global.interface_id));
 331         kref_init(&us_ibdev->vf_cnt);
 332
 333         usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n",
 334                         us_ibdev->ib_dev.name, netdev_name(us_ibdev->netdev),
 335                         us_ibdev->ufdev->mac, us_ibdev->ufdev->link_up,
 336                         us_ibdev->ufdev->mtu);
 337         return us_ibdev;
 338
 339 err_fwd_dealloc:
 340         usnic_fwd_dev_free(us_ibdev->ufdev);
 341 err_dealloc:
 342         usnic_err("failed -- deallocing device\n");
 343         ib_dealloc_device(&us_ibdev->ib_dev);
 344         return NULL;
 345 }
 346
 347 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev)
 348 {
 349         usnic_info("Unregistering %s\n", us_ibdev->ib_dev.name);
 350         usnic_ib_sysfs_unregister_usdev(us_ibdev);
 351         usnic_fwd_dev_free(us_ibdev->ufdev);
 352         ib_unregister_device(&us_ibdev->ib_dev);
 353         ib_dealloc_device(&us_ibdev->ib_dev);
 354 }
 355
 356 static void usnic_ib_undiscover_pf(struct kref *kref)
 357 {
 358         struct usnic_ib_dev *us_ibdev, *tmp;
 359         struct pci_dev *dev;
 360         bool found = false;
 361
 362         dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev;
 363         mutex_lock(&usnic_ib_ibdev_list_lock);
 364         list_for_each_entry_safe(us_ibdev, tmp,
 365                                 &usnic_ib_ibdev_list, ib_dev_link) {
 366                 if (us_ibdev->pdev == dev) {
 367                         list_del(&us_ibdev->ib_dev_link);
 368                         usnic_ib_device_remove(us_ibdev);
 369                         found = true;
 370                         break;
 371                 }
 372         }
 373
 374         WARN(!found, "Failed to remove PF %s\n", pci_name(dev));
 375
 376         mutex_unlock(&usnic_ib_ibdev_list_lock);
 377 }
 378
 379 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic)
 380 {
 381         struct usnic_ib_dev *us_ibdev;
 382         struct pci_dev *parent_pci, *vf_pci;
 383         int err;
 384
 385         vf_pci = usnic_vnic_get_pdev(vnic);
 386         parent_pci = pci_physfn(vf_pci);
 387
 388         BUG_ON(!parent_pci);
 389
 390         mutex_lock(&usnic_ib_ibdev_list_lock);
 391         list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
 392                 if (us_ibdev->pdev == parent_pci) {
 393                         kref_get(&us_ibdev->vf_cnt);
 394                         goto out;
 395                 }
 396         }
 397
 398         us_ibdev = usnic_ib_device_add(parent_pci);
 399         if (IS_ERR_OR_NULL(us_ibdev)) {
 400                 us_ibdev = (us_ibdev) ? us_ibdev : ERR_PTR(-EFAULT);
 401                 goto out;
 402         }
 403
 404         err = usnic_ib_sysfs_register_usdev(us_ibdev);
 405         if (err) {
 406                 usnic_ib_device_remove(us_ibdev);
 407                 us_ibdev = ERR_PTR(err);
 408                 goto out;
 409         }
 410
 411         list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list);
 412 out:
 413         mutex_unlock(&usnic_ib_ibdev_list_lock);
 414         return us_ibdev;
 415 }
 416 /* End of PF discovery section */
 417
 418 /* Start of PCI section */
 419
 420 static DEFINE_PCI_DEVICE_TABLE(usnic_ib_pci_ids) = {
 421         {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)},
 422         {0,}
 423 };
 424
 425 static int usnic_ib_pci_probe(struct pci_dev *pdev,
 426                                 const struct pci_device_id *id)
 427 {
 428         int err;
 429         struct usnic_ib_dev *pf;
 430         struct usnic_ib_vf *vf;
 431         enum usnic_vnic_res_type res_type;
 432
 433         vf = kzalloc(sizeof(*vf), GFP_KERNEL);
 434         if (!vf)
 435                 return -ENOMEM;
 436
 437         err = pci_enable_device(pdev);
 438         if (err) {
 439                 usnic_err("Failed to enable %s with err %d\n",
 440                                 pci_name(pdev), err);
 441                 goto out_clean_vf;
 442         }
 443
 444         err = pci_request_regions(pdev, DRV_NAME);
 445         if (err) {
 446                 usnic_err("Failed to request region for %s with err %d\n",
 447                                 pci_name(pdev), err);
 448                 goto out_disable_device;
 449         }
 450
 451         pci_set_master(pdev);
 452         pci_set_drvdata(pdev, vf);
 453
 454         vf->vnic = usnic_vnic_alloc(pdev);
 455         if (IS_ERR_OR_NULL(vf->vnic)) {
 456                 err = (vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM);
 457                 usnic_err("Failed to alloc vnic for %s with err %d\n",
 458                                 pci_name(pdev), err);
 459                 goto out_release_regions;
 460         }
 461
 462         pf = usnic_ib_discover_pf(vf->vnic);
 463         if (IS_ERR_OR_NULL(pf)) {
 464                 usnic_err("Failed to discover pf of vnic %s with err%ld\n",
 465                                 pci_name(pdev), PTR_ERR(pf));
 466                 err = (pf ? PTR_ERR(pf) : -EFAULT);
 467                 goto out_clean_vnic;
 468         }
 469
 470         vf->pf = pf;
 471         spin_lock_init(&vf->lock);
 472         mutex_lock(&pf->usdev_lock);
 473         list_add_tail(&vf->link, &pf->vf_dev_list);
 474         /*
 475          * Save max settings (will be same for each VF, easier to re-write than
 476          * to say "if (!set) { set_values(); set=1; }
 477          */
 478         for (res_type = USNIC_VNIC_RES_TYPE_EOL+1;
 479                         res_type < USNIC_VNIC_RES_TYPE_MAX;
 480                         res_type++) {
 481                 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic,
 482                                                                 res_type);
 483         }
 484
 485         mutex_unlock(&pf->usdev_lock);
 486
 487         usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev),
 488                         pf->ib_dev.name);
 489         usnic_ib_log_vf(vf);
 490         return 0;
 491
 492 out_clean_vnic:
 493         usnic_vnic_free(vf->vnic);
 494 out_release_regions:
 495         pci_set_drvdata(pdev, NULL);
 496         pci_clear_master(pdev);
 497         pci_release_regions(pdev);
 498 out_disable_device:
 499         pci_disable_device(pdev);
 500 out_clean_vf:
 501         kfree(vf);
 502         return err;
 503 }
 504
 505 static void usnic_ib_pci_remove(struct pci_dev *pdev)
 506 {
 507         struct usnic_ib_vf *vf = pci_get_drvdata(pdev);
 508         struct usnic_ib_dev *pf = vf->pf;
 509
 510         mutex_lock(&pf->usdev_lock);
 511         list_del(&vf->link);
 512         mutex_unlock(&pf->usdev_lock);
 513
 514         kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf);
 515         usnic_vnic_free(vf->vnic);
 516         pci_set_drvdata(pdev, NULL);
 517         pci_clear_master(pdev);
 518         pci_release_regions(pdev);
 519         pci_disable_device(pdev);
 520         kfree(vf);
 521
 522         usnic_info("Removed VF %s\n", pci_name(pdev));
 523 }
 524
 525 /* PCI driver entry points */
 526 static struct pci_driver usnic_ib_pci_driver = {
 527         .name = DRV_NAME,
 528         .id_table = usnic_ib_pci_ids,
 529         .probe = usnic_ib_pci_probe,
 530         .remove = usnic_ib_pci_remove,
 531 };
 532 /* End of PCI section */
 533
 534 /* Start of module section */
 535 static int __init usnic_ib_init(void)
 536 {
 537         int err;
 538
 539         printk_once(KERN_INFO "%s", usnic_version);
 540
 541         err = usnic_uiom_init(DRV_NAME);
 542         if (err) {
 543                 usnic_err("Unable to initalize umem with err %d\n", err);
 544                 return err;
 545         }
 546
 547         if (pci_register_driver(&usnic_ib_pci_driver)) {
 548                 usnic_err("Unable to register with PCI\n");
 549                 goto out_umem_fini;
 550         }
 551
 552         err = register_netdevice_notifier(&usnic_ib_netdevice_notifier);
 553         if (err) {
 554                 usnic_err("Failed to register netdev notifier\n");
 555                 goto out_pci_unreg;
 556         }
 557
 558         err = usnic_transport_init();
 559         if (err) {
 560                 usnic_err("Failed to initialize transport\n");
 561                 goto out_unreg_netdev_notifier;
 562         }
 563
 564         usnic_debugfs_init();
 565
 566         return 0;
 567
 568 out_unreg_netdev_notifier:
 569         unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
 570 out_pci_unreg:
 571         pci_unregister_driver(&usnic_ib_pci_driver);
 572 out_umem_fini:
 573         usnic_uiom_fini();
 574
 575         return err;
 576 }
 577
 578 static void __exit usnic_ib_destroy(void)
 579 {
 580         usnic_dbg("\n");
 581         usnic_debugfs_exit();
 582         usnic_transport_fini();
 583         unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
 584         pci_unregister_driver(&usnic_ib_pci_driver);
 585         usnic_uiom_fini();
 586 }
 587
 588 MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver");
 589 MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>");
 590 MODULE_LICENSE("Dual BSD/GPL");
 591 MODULE_VERSION(DRV_VERSION);
 592 module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR);
 593 module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR);
 594 MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3");
 595 MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs");
 596 MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids);
 597
 598 module_init(usnic_ib_init);
 599 module_exit(usnic_ib_destroy);
 600 /* End of module section */