drivers/scsi/fnic/vnic_dev.c

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/errno.h>
  21 #include <linux/types.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/if_ether.h>
  25 #include "vnic_resource.h"
  26 #include "vnic_devcmd.h"
  27 #include "vnic_dev.h"
  28 #include "vnic_stats.h"
  29
  30 struct vnic_res {
  31         void __iomem *vaddr;
  32         unsigned int count;
  33 };
  34
  35 struct vnic_dev {
  36         void *priv;
  37         struct pci_dev *pdev;
  38         struct vnic_res res[RES_TYPE_MAX];
  39         enum vnic_dev_intr_mode intr_mode;
  40         struct vnic_devcmd __iomem *devcmd;
  41         struct vnic_devcmd_notify *notify;
  42         struct vnic_devcmd_notify notify_copy;
  43         dma_addr_t notify_pa;
  44         u32 *linkstatus;
  45         dma_addr_t linkstatus_pa;
  46         struct vnic_stats *stats;
  47         dma_addr_t stats_pa;
  48         struct vnic_devcmd_fw_info *fw_info;
  49         dma_addr_t fw_info_pa;
  50 };
  51
  52 #define VNIC_MAX_RES_HDR_SIZE \
  53         (sizeof(struct vnic_resource_header) + \
  54         sizeof(struct vnic_resource) * RES_TYPE_MAX)
  55 #define VNIC_RES_STRIDE 128
  56
  57 void *vnic_dev_priv(struct vnic_dev *vdev)
  58 {
  59         return vdev->priv;
  60 }
  61
  62 static int vnic_dev_discover_res(struct vnic_dev *vdev,
  63         struct vnic_dev_bar *bar)
  64 {
  65         struct vnic_resource_header __iomem *rh;
  66         struct vnic_resource __iomem *r;
  67         u8 type;
  68
  69         if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
  70                 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
  71                 return -EINVAL;
  72         }
  73
  74         rh = bar->vaddr;
  75         if (!rh) {
  76                 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
  77                 return -EINVAL;
  78         }
  79
  80         if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
  81             ioread32(&rh->version) != VNIC_RES_VERSION) {
  82                 printk(KERN_ERR "vNIC BAR0 res magic/version error "
  83                         "exp (%lx/%lx) curr (%x/%x)\n",
  84                         VNIC_RES_MAGIC, VNIC_RES_VERSION,
  85                         ioread32(&rh->magic), ioread32(&rh->version));
  86                 return -EINVAL;
  87         }
  88
  89         r = (struct vnic_resource __iomem *)(rh + 1);
  90
  91         while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
  92
  93                 u8 bar_num = ioread8(&r->bar);
  94                 u32 bar_offset = ioread32(&r->bar_offset);
  95                 u32 count = ioread32(&r->count);
  96                 u32 len;
  97
  98                 r++;
  99
 100                 if (bar_num != 0)  /* only mapping in BAR0 resources */
 101                         continue;
 102
 103                 switch (type) {
 104                 case RES_TYPE_WQ:
 105                 case RES_TYPE_RQ:
 106                 case RES_TYPE_CQ:
 107                 case RES_TYPE_INTR_CTRL:
 108                         /* each count is stride bytes long */
 109                         len = count * VNIC_RES_STRIDE;
 110                         if (len + bar_offset > bar->len) {
 111                                 printk(KERN_ERR "vNIC BAR0 resource %d "
 112                                         "out-of-bounds, offset 0x%x + "
 113                                         "size 0x%x > bar len 0x%lx\n",
 114                                         type, bar_offset,
 115                                         len,
 116                                         bar->len);
 117                                 return -EINVAL;
 118                         }
 119                         break;
 120                 case RES_TYPE_INTR_PBA_LEGACY:
 121                 case RES_TYPE_DEVCMD:
 122                         len = count;
 123                         break;
 124                 default:
 125                         continue;
 126                 }
 127
 128                 vdev->res[type].count = count;
 129                 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
 130         }
 131
 132         return 0;
 133 }
 134
 135 unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
 136         enum vnic_res_type type)
 137 {
 138         return vdev->res[type].count;
 139 }
 140
 141 void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 142         unsigned int index)
 143 {
 144         if (!vdev->res[type].vaddr)
 145                 return NULL;
 146
 147         switch (type) {
 148         case RES_TYPE_WQ:
 149         case RES_TYPE_RQ:
 150         case RES_TYPE_CQ:
 151         case RES_TYPE_INTR_CTRL:
 152                 return (char __iomem *)vdev->res[type].vaddr +
 153                                         index * VNIC_RES_STRIDE;
 154         default:
 155                 return (char __iomem *)vdev->res[type].vaddr;
 156         }
 157 }
 158
 159 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 160                                      unsigned int desc_count,
 161                                      unsigned int desc_size)
 162 {
 163         /* The base address of the desc rings must be 512 byte aligned.
 164          * Descriptor count is aligned to groups of 32 descriptors.  A
 165          * count of 0 means the maximum 4096 descriptors.  Descriptor
 166          * size is aligned to 16 bytes.
 167          */
 168
 169         unsigned int count_align = 32;
 170         unsigned int desc_align = 16;
 171
 172         ring->base_align = 512;
 173
 174         if (desc_count == 0)
 175                 desc_count = 4096;
 176
 177         ring->desc_count = ALIGN(desc_count, count_align);
 178
 179         ring->desc_size = ALIGN(desc_size, desc_align);
 180
 181         ring->size = ring->desc_count * ring->desc_size;
 182         ring->size_unaligned = ring->size + ring->base_align;
 183
 184         return ring->size_unaligned;
 185 }
 186
 187 void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
 188 {
 189         memset(ring->descs, 0, ring->size);
 190 }
 191
 192 int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
 193         unsigned int desc_count, unsigned int desc_size)
 194 {
 195         vnic_dev_desc_ring_size(ring, desc_count, desc_size);
 196
 197         ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
 198                 ring->size_unaligned,
 199                 &ring->base_addr_unaligned);
 200
 201         if (!ring->descs_unaligned) {
 202                 printk(KERN_ERR
 203                   "Failed to allocate ring (size=%d), aborting\n",
 204                         (int)ring->size);
 205                 return -ENOMEM;
 206         }
 207
 208         ring->base_addr = ALIGN(ring->base_addr_unaligned,
 209                 ring->base_align);
 210         ring->descs = (u8 *)ring->descs_unaligned +
 211                 (ring->base_addr - ring->base_addr_unaligned);
 212
 213         vnic_dev_clear_desc_ring(ring);
 214
 215         ring->desc_avail = ring->desc_count - 1;
 216
 217         return 0;
 218 }
 219
 220 void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
 221 {
 222         if (ring->descs) {
 223                 pci_free_consistent(vdev->pdev,
 224                         ring->size_unaligned,
 225                         ring->descs_unaligned,
 226                         ring->base_addr_unaligned);
 227                 ring->descs = NULL;
 228         }
 229 }
 230
 231 int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 232         u64 *a0, u64 *a1, int wait)
 233 {
 234         struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
 235         int delay;
 236         u32 status;
 237         int dev_cmd_err[] = {
 238                 /* convert from fw's version of error.h to host's version */
 239                 0,      /* ERR_SUCCESS */
 240                 EINVAL, /* ERR_EINVAL */
 241                 EFAULT, /* ERR_EFAULT */
 242                 EPERM,  /* ERR_EPERM */
 243                 EBUSY,  /* ERR_EBUSY */
 244         };
 245         int err;
 246
 247         status = ioread32(&devcmd->status);
 248         if (status & STAT_BUSY) {
 249                 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
 250                 return -EBUSY;
 251         }
 252
 253         if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
 254                 writeq(*a0, &devcmd->args[0]);
 255                 writeq(*a1, &devcmd->args[1]);
 256                 wmb();
 257         }
 258
 259         iowrite32(cmd, &devcmd->cmd);
 260
 261         if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
 262                         return 0;
 263
 264         for (delay = 0; delay < wait; delay++) {
 265
 266                 udelay(100);
 267
 268                 status = ioread32(&devcmd->status);
 269                 if (!(status & STAT_BUSY)) {
 270
 271                         if (status & STAT_ERROR) {
 272                                 err = dev_cmd_err[(int)readq(&devcmd->args[0])];
 273                                 printk(KERN_ERR "Error %d devcmd %d\n",
 274                                         err, _CMD_N(cmd));
 275                                 return -err;
 276                         }
 277
 278                         if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
 279                                 rmb();
 280                                 *a0 = readq(&devcmd->args[0]);
 281                                 *a1 = readq(&devcmd->args[1]);
 282                         }
 283
 284                         return 0;
 285                 }
 286         }
 287
 288         printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
 289         return -ETIMEDOUT;
 290 }
 291
 292 int vnic_dev_fw_info(struct vnic_dev *vdev,
 293         struct vnic_devcmd_fw_info **fw_info)
 294 {
 295         u64 a0, a1 = 0;
 296         int wait = 1000;
 297         int err = 0;
 298
 299         if (!vdev->fw_info) {
 300                 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
 301                         sizeof(struct vnic_devcmd_fw_info),
 302                         &vdev->fw_info_pa);
 303                 if (!vdev->fw_info)
 304                         return -ENOMEM;
 305
 306                 a0 = vdev->fw_info_pa;
 307
 308                 /* only get fw_info once and cache it */
 309                 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
 310         }
 311
 312         *fw_info = vdev->fw_info;
 313
 314         return err;
 315 }
 316
 317 int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
 318         void *value)
 319 {
 320         u64 a0, a1;
 321         int wait = 1000;
 322         int err;
 323
 324         a0 = offset;
 325         a1 = size;
 326
 327         err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 328
 329         switch (size) {
 330         case 1:
 331                 *(u8 *)value = (u8)a0;
 332                 break;
 333         case 2:
 334                 *(u16 *)value = (u16)a0;
 335                 break;
 336         case 4:
 337                 *(u32 *)value = (u32)a0;
 338                 break;
 339         case 8:
 340                 *(u64 *)value = a0;
 341                 break;
 342         default:
 343                 BUG();
 344                 break;
 345         }
 346
 347         return err;
 348 }
 349
 350 int vnic_dev_stats_clear(struct vnic_dev *vdev)
 351 {
 352         u64 a0 = 0, a1 = 0;
 353         int wait = 1000;
 354         return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
 355 }
 356
 357 int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
 358 {
 359         u64 a0, a1;
 360         int wait = 1000;
 361
 362         if (!vdev->stats) {
 363                 vdev->stats = pci_alloc_consistent(vdev->pdev,
 364                         sizeof(struct vnic_stats), &vdev->stats_pa);
 365                 if (!vdev->stats)
 366                         return -ENOMEM;
 367         }
 368
 369         *stats = vdev->stats;
 370         a0 = vdev->stats_pa;
 371         a1 = sizeof(struct vnic_stats);
 372
 373         return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
 374 }
 375
 376 int vnic_dev_close(struct vnic_dev *vdev)
 377 {
 378         u64 a0 = 0, a1 = 0;
 379         int wait = 1000;
 380         return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
 381 }
 382
 383 int vnic_dev_enable(struct vnic_dev *vdev)
 384 {
 385         u64 a0 = 0, a1 = 0;
 386         int wait = 1000;
 387         return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 388 }
 389
 390 int vnic_dev_disable(struct vnic_dev *vdev)
 391 {
 392         u64 a0 = 0, a1 = 0;
 393         int wait = 1000;
 394         return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
 395 }
 396
 397 int vnic_dev_open(struct vnic_dev *vdev, int arg)
 398 {
 399         u64 a0 = (u32)arg, a1 = 0;
 400         int wait = 1000;
 401         return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
 402 }
 403
 404 int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
 405 {
 406         u64 a0 = 0, a1 = 0;
 407         int wait = 1000;
 408         int err;
 409
 410         *done = 0;
 411
 412         err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
 413         if (err)
 414                 return err;
 415
 416         *done = (a0 == 0);
 417
 418         return 0;
 419 }
 420
 421 int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
 422 {
 423         u64 a0 = (u32)arg, a1 = 0;
 424         int wait = 1000;
 425         return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
 426 }
 427
 428 int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
 429 {
 430         u64 a0 = 0, a1 = 0;
 431         int wait = 1000;
 432         int err;
 433
 434         *done = 0;
 435
 436         err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
 437         if (err)
 438                 return err;
 439
 440         *done = (a0 == 0);
 441
 442         return 0;
 443 }
 444
 445 int vnic_dev_hang_notify(struct vnic_dev *vdev)
 446 {
 447         u64 a0, a1;
 448         int wait = 1000;
 449         return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
 450 }
 451
 452 int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
 453 {
 454         u64 a0, a1;
 455         int wait = 1000;
 456         int err, i;
 457
 458         for (i = 0; i < ETH_ALEN; i++)
 459                 mac_addr[i] = 0;
 460
 461         err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
 462         if (err)
 463                 return err;
 464
 465         for (i = 0; i < ETH_ALEN; i++)
 466                 mac_addr[i] = ((u8 *)&a0)[i];
 467
 468         return 0;
 469 }
 470
 471 void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
 472         int broadcast, int promisc, int allmulti)
 473 {
 474         u64 a0, a1 = 0;
 475         int wait = 1000;
 476         int err;
 477
 478         a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
 479              (multicast ? CMD_PFILTER_MULTICAST : 0) |
 480              (broadcast ? CMD_PFILTER_BROADCAST : 0) |
 481              (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
 482              (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
 483
 484         err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
 485         if (err)
 486                 printk(KERN_ERR "Can't set packet filter\n");
 487 }
 488
 489 void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
 490 {
 491         u64 a0 = 0, a1 = 0;
 492         int wait = 1000;
 493         int err;
 494         int i;
 495
 496         for (i = 0; i < ETH_ALEN; i++)
 497                 ((u8 *)&a0)[i] = addr[i];
 498
 499         err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
 500         if (err)
 501                 printk(KERN_ERR
 502                         "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
 503                         addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
 504                         err);
 505 }
 506
 507 void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
 508 {
 509         u64 a0 = 0, a1 = 0;
 510         int wait = 1000;
 511         int err;
 512         int i;
 513
 514         for (i = 0; i < ETH_ALEN; i++)
 515                 ((u8 *)&a0)[i] = addr[i];
 516
 517         err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
 518         if (err)
 519                 printk(KERN_ERR
 520                         "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
 521                         addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
 522                         err);
 523 }
 524
 525 int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
 526 {
 527         u64 a0, a1;
 528         int wait = 1000;
 529
 530         if (!vdev->notify) {
 531                 vdev->notify = pci_alloc_consistent(vdev->pdev,
 532                         sizeof(struct vnic_devcmd_notify),
 533                         &vdev->notify_pa);
 534                 if (!vdev->notify)
 535                         return -ENOMEM;
 536         }
 537
 538         a0 = vdev->notify_pa;
 539         a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
 540         a1 += sizeof(struct vnic_devcmd_notify);
 541
 542         return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 543 }
 544
 545 void vnic_dev_notify_unset(struct vnic_dev *vdev)
 546 {
 547         u64 a0, a1;
 548         int wait = 1000;
 549
 550         a0 = 0;  /* paddr = 0 to unset notify buffer */
 551         a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
 552         a1 += sizeof(struct vnic_devcmd_notify);
 553
 554         vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
 555 }
 556
 557 static int vnic_dev_notify_ready(struct vnic_dev *vdev)
 558 {
 559         u32 *words;
 560         unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
 561         unsigned int i;
 562         u32 csum;
 563
 564         if (!vdev->notify)
 565                 return 0;
 566
 567         do {
 568                 csum = 0;
 569                 memcpy(&vdev->notify_copy, vdev->notify,
 570                         sizeof(struct vnic_devcmd_notify));
 571                 words = (u32 *)&vdev->notify_copy;
 572                 for (i = 1; i < nwords; i++)
 573                         csum += words[i];
 574         } while (csum != words[0]);
 575
 576         return 1;
 577 }
 578
 579 int vnic_dev_init(struct vnic_dev *vdev, int arg)
 580 {
 581         u64 a0 = (u32)arg, a1 = 0;
 582         int wait = 1000;
 583         return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
 584 }
 585
 586 int vnic_dev_link_status(struct vnic_dev *vdev)
 587 {
 588         if (vdev->linkstatus)
 589                 return *vdev->linkstatus;
 590
 591         if (!vnic_dev_notify_ready(vdev))
 592                 return 0;
 593
 594         return vdev->notify_copy.link_state;
 595 }
 596
 597 u32 vnic_dev_port_speed(struct vnic_dev *vdev)
 598 {
 599         if (!vnic_dev_notify_ready(vdev))
 600                 return 0;
 601
 602         return vdev->notify_copy.port_speed;
 603 }
 604
 605 u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
 606 {
 607         if (!vnic_dev_notify_ready(vdev))
 608                 return 0;
 609
 610         return vdev->notify_copy.msglvl;
 611 }
 612
 613 u32 vnic_dev_mtu(struct vnic_dev *vdev)
 614 {
 615         if (!vnic_dev_notify_ready(vdev))
 616                 return 0;
 617
 618         return vdev->notify_copy.mtu;
 619 }
 620
 621 u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
 622 {
 623         if (!vnic_dev_notify_ready(vdev))
 624                 return 0;
 625
 626         return vdev->notify_copy.link_down_cnt;
 627 }
 628
 629 void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
 630         enum vnic_dev_intr_mode intr_mode)
 631 {
 632         vdev->intr_mode = intr_mode;
 633 }
 634
 635 enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
 636         struct vnic_dev *vdev)
 637 {
 638         return vdev->intr_mode;
 639 }
 640
 641 void vnic_dev_unregister(struct vnic_dev *vdev)
 642 {
 643         if (vdev) {
 644                 if (vdev->notify)
 645                         pci_free_consistent(vdev->pdev,
 646                                 sizeof(struct vnic_devcmd_notify),
 647                                 vdev->notify,
 648                                 vdev->notify_pa);
 649                 if (vdev->linkstatus)
 650                         pci_free_consistent(vdev->pdev,
 651                                 sizeof(u32),
 652                                 vdev->linkstatus,
 653                                 vdev->linkstatus_pa);
 654                 if (vdev->stats)
 655                         pci_free_consistent(vdev->pdev,
 656                                 sizeof(struct vnic_dev),
 657                                 vdev->stats, vdev->stats_pa);
 658                 if (vdev->fw_info)
 659                         pci_free_consistent(vdev->pdev,
 660                                 sizeof(struct vnic_devcmd_fw_info),
 661                                 vdev->fw_info, vdev->fw_info_pa);
 662                 kfree(vdev);
 663         }
 664 }
 665
 666 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 667         void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
 668 {
 669         if (!vdev) {
 670                 vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
 671                 if (!vdev)
 672                         return NULL;
 673         }
 674
 675         vdev->priv = priv;
 676         vdev->pdev = pdev;
 677
 678         if (vnic_dev_discover_res(vdev, bar))
 679                 goto err_out;
 680
 681         vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
 682         if (!vdev->devcmd)
 683                 goto err_out;
 684
 685         return vdev;
 686
 687 err_out:
 688         vnic_dev_unregister(vdev);
 689         return NULL;
 690 }