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/inetdevice.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/errno.h>
  32 #include <linux/pci.h>
  33 #include <linux/netdevice.h>
  34
  35 #include <rdma/ib_user_verbs.h>
  36 #include <rdma/ib_addr.h>
  37
  38 #include "usnic_abi.h"
  39 #include "usnic_common_util.h"
  40 #include "usnic_ib.h"
  41 #include "usnic_ib_qp_grp.h"
  42 #include "usnic_log.h"
  43 #include "usnic_fwd.h"
  44 #include "usnic_debugfs.h"
  45 #include "usnic_ib_verbs.h"
  46 #include "usnic_transport.h"
  47 #include "usnic_uiom.h"
  48 #include "usnic_ib_sysfs.h"
  49
  50 unsigned int usnic_log_lvl = USNIC_LOG_LVL_ERR;
  51 unsigned int usnic_ib_share_vf = 1;
  52
  53 static const char usnic_version[] =
  54         DRV_NAME ": Cisco VIC (USNIC) Verbs Driver v"
  55         DRV_VERSION " (" DRV_RELDATE ")\n";
  56
  57 static DEFINE_MUTEX(usnic_ib_ibdev_list_lock);
  58 static LIST_HEAD(usnic_ib_ibdev_list);
  59
  60 /* Callback dump funcs */
  61 static int usnic_ib_dump_vf_hdr(void *obj, char *buf, int buf_sz)
  62 {
  63         struct usnic_ib_vf *vf = obj;
  64         return scnprintf(buf, buf_sz, "PF: %s ", vf->pf->ib_dev.name);
  65 }
  66 /* End callback dump funcs */
  67
  68 static void usnic_ib_dump_vf(struct usnic_ib_vf *vf, char *buf, int buf_sz)
  69 {
  70         usnic_vnic_dump(vf->vnic, buf, buf_sz, vf,
  71                         usnic_ib_dump_vf_hdr,
  72                         usnic_ib_qp_grp_dump_hdr, usnic_ib_qp_grp_dump_rows);
  73 }
  74
  75 void usnic_ib_log_vf(struct usnic_ib_vf *vf)
  76 {
  77         char buf[1000];
  78         usnic_ib_dump_vf(vf, buf, sizeof(buf));
  79         usnic_dbg("%s\n", buf);
  80 }
  81
  82 /* Start of netdev section */
  83 static inline const char *usnic_ib_netdev_event_to_string(unsigned long event)
  84 {
  85         const char *event2str[] = {"NETDEV_NONE", "NETDEV_UP", "NETDEV_DOWN",
  86                 "NETDEV_REBOOT", "NETDEV_CHANGE",
  87                 "NETDEV_REGISTER", "NETDEV_UNREGISTER", "NETDEV_CHANGEMTU",
  88                 "NETDEV_CHANGEADDR", "NETDEV_GOING_DOWN", "NETDEV_FEAT_CHANGE",
  89                 "NETDEV_BONDING_FAILOVER", "NETDEV_PRE_UP",
  90                 "NETDEV_PRE_TYPE_CHANGE", "NETDEV_POST_TYPE_CHANGE",
  91                 "NETDEV_POST_INT", "NETDEV_UNREGISTER_FINAL", "NETDEV_RELEASE",
  92                 "NETDEV_NOTIFY_PEERS", "NETDEV_JOIN"
  93         };
  94
  95         if (event >= ARRAY_SIZE(event2str))
  96                 return "UNKNOWN_NETDEV_EVENT";
  97         else
  98                 return event2str[event];
  99 }
 100
 101 static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev)
 102 {
 103         struct usnic_ib_ucontext *ctx;
 104         struct usnic_ib_qp_grp *qp_grp;
 105         enum ib_qp_state cur_state;
 106         int status;
 107
 108         BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
 109
 110         list_for_each_entry(ctx, &us_ibdev->ctx_list, link) {
 111                 list_for_each_entry(qp_grp, &ctx->qp_grp_list, link) {
 112                         cur_state = qp_grp->state;
 113                         if (cur_state == IB_QPS_INIT ||
 114                                 cur_state == IB_QPS_RTR ||
 115                                 cur_state == IB_QPS_RTS) {
 116                                 status = usnic_ib_qp_grp_modify(qp_grp,
 117                                                                 IB_QPS_ERR,
 118                                                                 NULL);
 119                                 if (status) {
 120                                         usnic_err("Failed to transistion qp grp %u from %s to %s\n",
 121                                                 qp_grp->grp_id,
 122                                                 usnic_ib_qp_grp_state_to_string
 123                                                 (cur_state),
 124                                                 usnic_ib_qp_grp_state_to_string
 125                                                 (IB_QPS_ERR));
 126                                 }
 127                         }
 128                 }
 129         }
 130 }
 131
 132 static void usnic_ib_handle_usdev_event(struct usnic_ib_dev *us_ibdev,
 133                                         unsigned long event)
 134 {
 135         struct net_device *netdev;
 136         struct ib_event ib_event;
 137
 138         memset(&ib_event, 0, sizeof(ib_event));
 139
 140         mutex_lock(&us_ibdev->usdev_lock);
 141         netdev = us_ibdev->netdev;
 142         switch (event) {
 143         case NETDEV_REBOOT:
 144                 usnic_info("PF Reset on %s\n", us_ibdev->ib_dev.name);
 145                 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 146                 ib_event.event = IB_EVENT_PORT_ERR;
 147                 ib_event.device = &us_ibdev->ib_dev;
 148                 ib_event.element.port_num = 1;
 149                 ib_dispatch_event(&ib_event);
 150                 break;
 151         case NETDEV_UP:
 152         case NETDEV_DOWN:
 153         case NETDEV_CHANGE:
 154                 if (!us_ibdev->ufdev->link_up &&
 155                                 netif_carrier_ok(netdev)) {
 156                         usnic_fwd_carrier_up(us_ibdev->ufdev);
 157                         usnic_info("Link UP on %s\n", us_ibdev->ib_dev.name);
 158                         ib_event.event = IB_EVENT_PORT_ACTIVE;
 159                         ib_event.device = &us_ibdev->ib_dev;
 160                         ib_event.element.port_num = 1;
 161                         ib_dispatch_event(&ib_event);
 162                 } else if (us_ibdev->ufdev->link_up &&
 163                                 !netif_carrier_ok(netdev)) {
 164                         usnic_fwd_carrier_down(us_ibdev->ufdev);
 165                         usnic_info("Link DOWN on %s\n", us_ibdev->ib_dev.name);
 166                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 167                         ib_event.event = IB_EVENT_PORT_ERR;
 168                         ib_event.device = &us_ibdev->ib_dev;
 169                         ib_event.element.port_num = 1;
 170                         ib_dispatch_event(&ib_event);
 171                 } else {
 172                         usnic_dbg("Ignoring %s on %s\n",
 173                                         usnic_ib_netdev_event_to_string(event),
 174                                         us_ibdev->ib_dev.name);
 175                 }
 176                 break;
 177         case NETDEV_CHANGEADDR:
 178                 if (!memcmp(us_ibdev->ufdev->mac, netdev->dev_addr,
 179                                 sizeof(us_ibdev->ufdev->mac))) {
 180                         usnic_dbg("Ignoring addr change on %s\n",
 181                                         us_ibdev->ib_dev.name);
 182                 } else {
 183                         usnic_info(" %s old mac: %pM new mac: %pM\n",
 184                                         us_ibdev->ib_dev.name,
 185                                         us_ibdev->ufdev->mac,
 186                                         netdev->dev_addr);
 187                         usnic_fwd_set_mac(us_ibdev->ufdev, netdev->dev_addr);
 188                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 189                         ib_event.event = IB_EVENT_GID_CHANGE;
 190                         ib_event.device = &us_ibdev->ib_dev;
 191                         ib_event.element.port_num = 1;
 192                         ib_dispatch_event(&ib_event);
 193                 }
 194
 195                 break;
 196         case NETDEV_CHANGEMTU:
 197                 if (us_ibdev->ufdev->mtu != netdev->mtu) {
 198                         usnic_info("MTU Change on %s old: %u new: %u\n",
 199                                         us_ibdev->ib_dev.name,
 200                                         us_ibdev->ufdev->mtu, netdev->mtu);
 201                         usnic_fwd_set_mtu(us_ibdev->ufdev, netdev->mtu);
 202                         usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 203                 } else {
 204                         usnic_dbg("Ignoring MTU change on %s\n",
 205                                         us_ibdev->ib_dev.name);
 206                 }
 207                 break;
 208         default:
 209                 usnic_dbg("Ignoring event %s on %s",
 210                                 usnic_ib_netdev_event_to_string(event),
 211                                 us_ibdev->ib_dev.name);
 212         }
 213         mutex_unlock(&us_ibdev->usdev_lock);
 214 }
 215
 216 static int usnic_ib_netdevice_event(struct notifier_block *notifier,
 217                                         unsigned long event, void *ptr)
 218 {
 219         struct usnic_ib_dev *us_ibdev;
 220
 221         struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
 222
 223         mutex_lock(&usnic_ib_ibdev_list_lock);
 224         list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
 225                 if (us_ibdev->netdev == netdev) {
 226                         usnic_ib_handle_usdev_event(us_ibdev, event);
 227                         break;
 228                 }
 229         }
 230         mutex_unlock(&usnic_ib_ibdev_list_lock);
 231
 232         return NOTIFY_DONE;
 233 }
 234
 235 static struct notifier_block usnic_ib_netdevice_notifier = {
 236         .notifier_call = usnic_ib_netdevice_event
 237 };
 238 /* End of netdev section */
 239
 240 /* Start of inet section */
 241 static int usnic_ib_handle_inet_event(struct usnic_ib_dev *us_ibdev,
 242                                         unsigned long event, void *ptr)
 243 {
 244         struct in_ifaddr *ifa = ptr;
 245         struct ib_event ib_event;
 246
 247         mutex_lock(&us_ibdev->usdev_lock);
 248
 249         switch (event) {
 250         case NETDEV_DOWN:
 251                 usnic_info("%s via ip notifiers",
 252                                 usnic_ib_netdev_event_to_string(event));
 253                 usnic_fwd_del_ipaddr(us_ibdev->ufdev);
 254                 usnic_ib_qp_grp_modify_active_to_err(us_ibdev);
 255                 ib_event.event = IB_EVENT_GID_CHANGE;
 256                 ib_event.device = &us_ibdev->ib_dev;
 257                 ib_event.element.port_num = 1;
 258                 ib_dispatch_event(&ib_event);
 259                 break;
 260         case NETDEV_UP:
 261                 usnic_fwd_add_ipaddr(us_ibdev->ufdev, ifa->ifa_address);
 262                 usnic_info("%s via ip notifiers: ip %pI4",
 263                                 usnic_ib_netdev_event_to_string(event),
 264                                 &us_ibdev->ufdev->inaddr);
 265                 ib_event.event = IB_EVENT_GID_CHANGE;
 266                 ib_event.device = &us_ibdev->ib_dev;
 267                 ib_event.element.port_num = 1;
 268                 ib_dispatch_event(&ib_event);
 269                 break;
 270         default:
 271                 usnic_info("Ignoring event %s on %s",
 272                                 usnic_ib_netdev_event_to_string(event),
 273                                 us_ibdev->ib_dev.name);
 274         }
 275         mutex_unlock(&us_ibdev->usdev_lock);
 276
 277         return NOTIFY_DONE;
 278 }
 279
 280 static int usnic_ib_inetaddr_event(struct notifier_block *notifier,
 281                                         unsigned long event, void *ptr)
 282 {
 283         struct usnic_ib_dev *us_ibdev;
 284         struct in_ifaddr *ifa = ptr;
 285         struct net_device *netdev = ifa->ifa_dev->dev;
 286
 287         mutex_lock(&usnic_ib_ibdev_list_lock);
 288         list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
 289                 if (us_ibdev->netdev == netdev) {
 290                         usnic_ib_handle_inet_event(us_ibdev, event, ptr);
 291                         break;
 292                 }
 293         }
 294         mutex_unlock(&usnic_ib_ibdev_list_lock);
 295
 296         return NOTIFY_DONE;
 297 }
 298 static struct notifier_block usnic_ib_inetaddr_notifier = {
 299         .notifier_call = usnic_ib_inetaddr_event
 300 };
 301 /* End of inet section*/
 302
 303 /* Start of PF discovery section */
 304 static void *usnic_ib_device_add(struct pci_dev *dev)
 305 {
 306         struct usnic_ib_dev *us_ibdev;
 307         union ib_gid gid;
 308         struct in_ifaddr *in;
 309         struct net_device *netdev;
 310
 311         usnic_dbg("\n");
 312         netdev = pci_get_drvdata(dev);
 313
 314         us_ibdev = (struct usnic_ib_dev *)ib_alloc_device(sizeof(*us_ibdev));
 315         if (IS_ERR_OR_NULL(us_ibdev)) {
 316                 usnic_err("Device %s context alloc failed\n",
 317                                 netdev_name(pci_get_drvdata(dev)));
 318                 return ERR_PTR(us_ibdev ? PTR_ERR(us_ibdev) : -EFAULT);
 319         }
 320
 321         us_ibdev->ufdev = usnic_fwd_dev_alloc(dev);
 322         if (IS_ERR_OR_NULL(us_ibdev->ufdev)) {
 323                 usnic_err("Failed to alloc ufdev for %s with err %ld\n",
 324                                 pci_name(dev), PTR_ERR(us_ibdev->ufdev));
 325                 goto err_dealloc;
 326         }
 327
 328         mutex_init(&us_ibdev->usdev_lock);
 329         INIT_LIST_HEAD(&us_ibdev->vf_dev_list);
 330         INIT_LIST_HEAD(&us_ibdev->ctx_list);
 331
 332         us_ibdev->pdev = dev;
 333         us_ibdev->netdev = pci_get_drvdata(dev);
 334         us_ibdev->ib_dev.owner = THIS_MODULE;
 335         us_ibdev->ib_dev.node_type = RDMA_NODE_USNIC_UDP;
 336         us_ibdev->ib_dev.phys_port_cnt = USNIC_IB_PORT_CNT;
 337         us_ibdev->ib_dev.num_comp_vectors = USNIC_IB_NUM_COMP_VECTORS;
 338         us_ibdev->ib_dev.dma_device = &dev->dev;
 339         us_ibdev->ib_dev.uverbs_abi_ver = USNIC_UVERBS_ABI_VERSION;
 340         strlcpy(us_ibdev->ib_dev.name, "usnic_%d", IB_DEVICE_NAME_MAX);
 341
 342         us_ibdev->ib_dev.uverbs_cmd_mask =
 343                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
 344                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
 345                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
 346                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
 347                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
 348                 (1ull << IB_USER_VERBS_CMD_REG_MR) |
 349                 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
 350                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 351                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
 352                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
 353                 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
 354                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
 355                 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
 356                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
 357                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
 358                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
 359                 (1ull << IB_USER_VERBS_CMD_OPEN_QP);
 360
 361         us_ibdev->ib_dev.query_device = usnic_ib_query_device;
 362         us_ibdev->ib_dev.query_port = usnic_ib_query_port;
 363         us_ibdev->ib_dev.query_pkey = usnic_ib_query_pkey;
 364         us_ibdev->ib_dev.query_gid = usnic_ib_query_gid;
 365         us_ibdev->ib_dev.get_link_layer = usnic_ib_port_link_layer;
 366         us_ibdev->ib_dev.alloc_pd = usnic_ib_alloc_pd;
 367         us_ibdev->ib_dev.dealloc_pd = usnic_ib_dealloc_pd;
 368         us_ibdev->ib_dev.create_qp = usnic_ib_create_qp;
 369         us_ibdev->ib_dev.modify_qp = usnic_ib_modify_qp;
 370         us_ibdev->ib_dev.query_qp = usnic_ib_query_qp;
 371         us_ibdev->ib_dev.destroy_qp = usnic_ib_destroy_qp;
 372         us_ibdev->ib_dev.create_cq = usnic_ib_create_cq;
 373         us_ibdev->ib_dev.destroy_cq = usnic_ib_destroy_cq;
 374         us_ibdev->ib_dev.reg_user_mr = usnic_ib_reg_mr;
 375         us_ibdev->ib_dev.dereg_mr = usnic_ib_dereg_mr;
 376         us_ibdev->ib_dev.alloc_ucontext = usnic_ib_alloc_ucontext;
 377         us_ibdev->ib_dev.dealloc_ucontext = usnic_ib_dealloc_ucontext;
 378         us_ibdev->ib_dev.mmap = usnic_ib_mmap;
 379         us_ibdev->ib_dev.create_ah = usnic_ib_create_ah;
 380         us_ibdev->ib_dev.destroy_ah = usnic_ib_destroy_ah;
 381         us_ibdev->ib_dev.post_send = usnic_ib_post_send;
 382         us_ibdev->ib_dev.post_recv = usnic_ib_post_recv;
 383         us_ibdev->ib_dev.poll_cq = usnic_ib_poll_cq;
 384         us_ibdev->ib_dev.req_notify_cq = usnic_ib_req_notify_cq;
 385         us_ibdev->ib_dev.get_dma_mr = usnic_ib_get_dma_mr;
 386
 387
 388         if (ib_register_device(&us_ibdev->ib_dev, NULL))
 389                 goto err_fwd_dealloc;
 390
 391         usnic_fwd_set_mtu(us_ibdev->ufdev, us_ibdev->netdev->mtu);
 392         usnic_fwd_set_mac(us_ibdev->ufdev, us_ibdev->netdev->dev_addr);
 393         if (netif_carrier_ok(us_ibdev->netdev))
 394                 usnic_fwd_carrier_up(us_ibdev->ufdev);
 395
 396         in = ((struct in_device *)(netdev->ip_ptr))->ifa_list;
 397         if (in != NULL)
 398                 usnic_fwd_add_ipaddr(us_ibdev->ufdev, in->ifa_address);
 399
 400         usnic_mac_ip_to_gid(us_ibdev->netdev->perm_addr,
 401                                 us_ibdev->ufdev->inaddr, &gid.raw[0]);
 402         memcpy(&us_ibdev->ib_dev.node_guid, &gid.global.interface_id,
 403                 sizeof(gid.global.interface_id));
 404         kref_init(&us_ibdev->vf_cnt);
 405
 406         usnic_info("Added ibdev: %s netdev: %s with mac %pM Link: %u MTU: %u\n",
 407                         us_ibdev->ib_dev.name, netdev_name(us_ibdev->netdev),
 408                         us_ibdev->ufdev->mac, us_ibdev->ufdev->link_up,
 409                         us_ibdev->ufdev->mtu);
 410         return us_ibdev;
 411
 412 err_fwd_dealloc:
 413         usnic_fwd_dev_free(us_ibdev->ufdev);
 414 err_dealloc:
 415         usnic_err("failed -- deallocing device\n");
 416         ib_dealloc_device(&us_ibdev->ib_dev);
 417         return NULL;
 418 }
 419
 420 static void usnic_ib_device_remove(struct usnic_ib_dev *us_ibdev)
 421 {
 422         usnic_info("Unregistering %s\n", us_ibdev->ib_dev.name);
 423         usnic_ib_sysfs_unregister_usdev(us_ibdev);
 424         usnic_fwd_dev_free(us_ibdev->ufdev);
 425         ib_unregister_device(&us_ibdev->ib_dev);
 426         ib_dealloc_device(&us_ibdev->ib_dev);
 427 }
 428
 429 static void usnic_ib_undiscover_pf(struct kref *kref)
 430 {
 431         struct usnic_ib_dev *us_ibdev, *tmp;
 432         struct pci_dev *dev;
 433         bool found = false;
 434
 435         dev = container_of(kref, struct usnic_ib_dev, vf_cnt)->pdev;
 436         mutex_lock(&usnic_ib_ibdev_list_lock);
 437         list_for_each_entry_safe(us_ibdev, tmp,
 438                                 &usnic_ib_ibdev_list, ib_dev_link) {
 439                 if (us_ibdev->pdev == dev) {
 440                         list_del(&us_ibdev->ib_dev_link);
 441                         usnic_ib_device_remove(us_ibdev);
 442                         found = true;
 443                         break;
 444                 }
 445         }
 446
 447         WARN(!found, "Failed to remove PF %s\n", pci_name(dev));
 448
 449         mutex_unlock(&usnic_ib_ibdev_list_lock);
 450 }
 451
 452 static struct usnic_ib_dev *usnic_ib_discover_pf(struct usnic_vnic *vnic)
 453 {
 454         struct usnic_ib_dev *us_ibdev;
 455         struct pci_dev *parent_pci, *vf_pci;
 456         int err;
 457
 458         vf_pci = usnic_vnic_get_pdev(vnic);
 459         parent_pci = pci_physfn(vf_pci);
 460
 461         BUG_ON(!parent_pci);
 462
 463         mutex_lock(&usnic_ib_ibdev_list_lock);
 464         list_for_each_entry(us_ibdev, &usnic_ib_ibdev_list, ib_dev_link) {
 465                 if (us_ibdev->pdev == parent_pci) {
 466                         kref_get(&us_ibdev->vf_cnt);
 467                         goto out;
 468                 }
 469         }
 470
 471         us_ibdev = usnic_ib_device_add(parent_pci);
 472         if (IS_ERR_OR_NULL(us_ibdev)) {
 473                 us_ibdev = us_ibdev ? us_ibdev : ERR_PTR(-EFAULT);
 474                 goto out;
 475         }
 476
 477         err = usnic_ib_sysfs_register_usdev(us_ibdev);
 478         if (err) {
 479                 usnic_ib_device_remove(us_ibdev);
 480                 us_ibdev = ERR_PTR(err);
 481                 goto out;
 482         }
 483
 484         list_add(&us_ibdev->ib_dev_link, &usnic_ib_ibdev_list);
 485 out:
 486         mutex_unlock(&usnic_ib_ibdev_list_lock);
 487         return us_ibdev;
 488 }
 489 /* End of PF discovery section */
 490
 491 /* Start of PCI section */
 492
 493 static DEFINE_PCI_DEVICE_TABLE(usnic_ib_pci_ids) = {
 494         {PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC)},
 495         {0,}
 496 };
 497
 498 static int usnic_ib_pci_probe(struct pci_dev *pdev,
 499                                 const struct pci_device_id *id)
 500 {
 501         int err;
 502         struct usnic_ib_dev *pf;
 503         struct usnic_ib_vf *vf;
 504         enum usnic_vnic_res_type res_type;
 505
 506         vf = kzalloc(sizeof(*vf), GFP_KERNEL);
 507         if (!vf)
 508                 return -ENOMEM;
 509
 510         err = pci_enable_device(pdev);
 511         if (err) {
 512                 usnic_err("Failed to enable %s with err %d\n",
 513                                 pci_name(pdev), err);
 514                 goto out_clean_vf;
 515         }
 516
 517         err = pci_request_regions(pdev, DRV_NAME);
 518         if (err) {
 519                 usnic_err("Failed to request region for %s with err %d\n",
 520                                 pci_name(pdev), err);
 521                 goto out_disable_device;
 522         }
 523
 524         pci_set_master(pdev);
 525         pci_set_drvdata(pdev, vf);
 526
 527         vf->vnic = usnic_vnic_alloc(pdev);
 528         if (IS_ERR_OR_NULL(vf->vnic)) {
 529                 err = vf->vnic ? PTR_ERR(vf->vnic) : -ENOMEM;
 530                 usnic_err("Failed to alloc vnic for %s with err %d\n",
 531                                 pci_name(pdev), err);
 532                 goto out_release_regions;
 533         }
 534
 535         pf = usnic_ib_discover_pf(vf->vnic);
 536         if (IS_ERR_OR_NULL(pf)) {
 537                 usnic_err("Failed to discover pf of vnic %s with err%ld\n",
 538                                 pci_name(pdev), PTR_ERR(pf));
 539                 err = pf ? PTR_ERR(pf) : -EFAULT;
 540                 goto out_clean_vnic;
 541         }
 542
 543         vf->pf = pf;
 544         spin_lock_init(&vf->lock);
 545         mutex_lock(&pf->usdev_lock);
 546         list_add_tail(&vf->link, &pf->vf_dev_list);
 547         /*
 548          * Save max settings (will be same for each VF, easier to re-write than
 549          * to say "if (!set) { set_values(); set=1; }
 550          */
 551         for (res_type = USNIC_VNIC_RES_TYPE_EOL+1;
 552                         res_type < USNIC_VNIC_RES_TYPE_MAX;
 553                         res_type++) {
 554                 pf->vf_res_cnt[res_type] = usnic_vnic_res_cnt(vf->vnic,
 555                                                                 res_type);
 556         }
 557
 558         mutex_unlock(&pf->usdev_lock);
 559
 560         usnic_info("Registering usnic VF %s into PF %s\n", pci_name(pdev),
 561                         pf->ib_dev.name);
 562         usnic_ib_log_vf(vf);
 563         return 0;
 564
 565 out_clean_vnic:
 566         usnic_vnic_free(vf->vnic);
 567 out_release_regions:
 568         pci_set_drvdata(pdev, NULL);
 569         pci_clear_master(pdev);
 570         pci_release_regions(pdev);
 571 out_disable_device:
 572         pci_disable_device(pdev);
 573 out_clean_vf:
 574         kfree(vf);
 575         return err;
 576 }
 577
 578 static void usnic_ib_pci_remove(struct pci_dev *pdev)
 579 {
 580         struct usnic_ib_vf *vf = pci_get_drvdata(pdev);
 581         struct usnic_ib_dev *pf = vf->pf;
 582
 583         mutex_lock(&pf->usdev_lock);
 584         list_del(&vf->link);
 585         mutex_unlock(&pf->usdev_lock);
 586
 587         kref_put(&pf->vf_cnt, usnic_ib_undiscover_pf);
 588         usnic_vnic_free(vf->vnic);
 589         pci_set_drvdata(pdev, NULL);
 590         pci_clear_master(pdev);
 591         pci_release_regions(pdev);
 592         pci_disable_device(pdev);
 593         kfree(vf);
 594
 595         usnic_info("Removed VF %s\n", pci_name(pdev));
 596 }
 597
 598 /* PCI driver entry points */
 599 static struct pci_driver usnic_ib_pci_driver = {
 600         .name = DRV_NAME,
 601         .id_table = usnic_ib_pci_ids,
 602         .probe = usnic_ib_pci_probe,
 603         .remove = usnic_ib_pci_remove,
 604 };
 605 /* End of PCI section */
 606
 607 /* Start of module section */
 608 static int __init usnic_ib_init(void)
 609 {
 610         int err;
 611
 612         printk_once(KERN_INFO "%s", usnic_version);
 613
 614         err = usnic_uiom_init(DRV_NAME);
 615         if (err) {
 616                 usnic_err("Unable to initalize umem with err %d\n", err);
 617                 return err;
 618         }
 619
 620         if (pci_register_driver(&usnic_ib_pci_driver)) {
 621                 usnic_err("Unable to register with PCI\n");
 622                 goto out_umem_fini;
 623         }
 624
 625         err = register_netdevice_notifier(&usnic_ib_netdevice_notifier);
 626         if (err) {
 627                 usnic_err("Failed to register netdev notifier\n");
 628                 goto out_pci_unreg;
 629         }
 630
 631         err = register_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
 632         if (err) {
 633                 usnic_err("Failed to register inet addr notifier\n");
 634                 goto out_unreg_netdev_notifier;
 635         }
 636
 637         err = usnic_transport_init();
 638         if (err) {
 639                 usnic_err("Failed to initialize transport\n");
 640                 goto out_unreg_inetaddr_notifier;
 641         }
 642
 643         usnic_debugfs_init();
 644
 645         return 0;
 646
 647 out_unreg_inetaddr_notifier:
 648         unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
 649 out_unreg_netdev_notifier:
 650         unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
 651 out_pci_unreg:
 652         pci_unregister_driver(&usnic_ib_pci_driver);
 653 out_umem_fini:
 654         usnic_uiom_fini();
 655
 656         return err;
 657 }
 658
 659 static void __exit usnic_ib_destroy(void)
 660 {
 661         usnic_dbg("\n");
 662         usnic_debugfs_exit();
 663         usnic_transport_fini();
 664         unregister_inetaddr_notifier(&usnic_ib_inetaddr_notifier);
 665         unregister_netdevice_notifier(&usnic_ib_netdevice_notifier);
 666         pci_unregister_driver(&usnic_ib_pci_driver);
 667         usnic_uiom_fini();
 668 }
 669
 670 MODULE_DESCRIPTION("Cisco VIC (usNIC) Verbs Driver");
 671 MODULE_AUTHOR("Upinder Malhi <umalhi@cisco.com>");
 672 MODULE_LICENSE("Dual BSD/GPL");
 673 MODULE_VERSION(DRV_VERSION);
 674 module_param(usnic_log_lvl, uint, S_IRUGO | S_IWUSR);
 675 module_param(usnic_ib_share_vf, uint, S_IRUGO | S_IWUSR);
 676 MODULE_PARM_DESC(usnic_log_lvl, " Off=0, Err=1, Info=2, Debug=3");
 677 MODULE_PARM_DESC(usnic_ib_share_vf, "Off=0, On=1 VF sharing amongst QPs");
 678 MODULE_DEVICE_TABLE(pci, usnic_ib_pci_ids);
 679
 680 module_init(usnic_ib_init);
 681 module_exit(usnic_ib_destroy);
 682 /* End of module section */