1 /* 2 * Copyright 2014 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 18 #include <linux/kernel.h> 19 #include <linux/errno.h> 20 #include <linux/types.h> 21 #include <linux/pci.h> 22 #include <linux/delay.h> 23 #include <linux/if_ether.h> 24 #include <linux/slab.h> 25 #include "vnic_resource.h" 26 #include "vnic_devcmd.h" 27 #include "vnic_dev.h" 28 #include "vnic_stats.h" 29 #include "vnic_wq.h" 30 31 #define VNIC_DVCMD_TMO 10000 /* Devcmd Timeout value */ 32 #define VNIC_NOTIFY_INTR_MASK 0x0000ffff00000000ULL 33 34 struct devcmd2_controller { 35 struct vnic_wq_ctrl __iomem *wq_ctrl; 36 struct vnic_dev_ring results_ring; 37 struct vnic_wq wq; 38 struct vnic_devcmd2 *cmd_ring; 39 struct devcmd2_result *result; 40 u16 next_result; 41 u16 result_size; 42 int color; 43 }; 44 45 struct vnic_res { 46 void __iomem *vaddr; 47 unsigned int count; 48 }; 49 50 struct vnic_dev { 51 void *priv; 52 struct pci_dev *pdev; 53 struct vnic_res res[RES_TYPE_MAX]; 54 enum vnic_dev_intr_mode intr_mode; 55 struct vnic_devcmd __iomem *devcmd; 56 struct vnic_devcmd_notify *notify; 57 struct vnic_devcmd_notify notify_copy; 58 dma_addr_t notify_pa; 59 u32 *linkstatus; 60 dma_addr_t linkstatus_pa; 61 struct vnic_stats *stats; 62 dma_addr_t stats_pa; 63 struct vnic_devcmd_fw_info *fw_info; 64 dma_addr_t fw_info_pa; 65 u64 args[VNIC_DEVCMD_NARGS]; 66 struct devcmd2_controller *devcmd2; 67 68 int (*devcmd_rtn)(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 69 int wait); 70 }; 71 72 #define VNIC_MAX_RES_HDR_SIZE \ 73 (sizeof(struct vnic_resource_header) + \ 74 sizeof(struct vnic_resource) * RES_TYPE_MAX) 75 #define VNIC_RES_STRIDE 128 76 77 void *svnic_dev_priv(struct vnic_dev *vdev) 78 { 79 return vdev->priv; 80 } 81 82 static int vnic_dev_discover_res(struct vnic_dev *vdev, 83 struct vnic_dev_bar *bar, unsigned int num_bars) 84 { 85 struct vnic_resource_header __iomem *rh; 86 struct vnic_resource __iomem *r; 87 u8 type; 88 89 if (num_bars == 0) 90 return -EINVAL; 91 92 if (bar->len < VNIC_MAX_RES_HDR_SIZE) { 93 pr_err("vNIC BAR0 res hdr length error\n"); 94 95 return -EINVAL; 96 } 97 98 rh = bar->vaddr; 99 if (!rh) { 100 pr_err("vNIC BAR0 res hdr not mem-mapped\n"); 101 102 return -EINVAL; 103 } 104 105 if (ioread32(&rh->magic) != VNIC_RES_MAGIC || 106 ioread32(&rh->version) != VNIC_RES_VERSION) { 107 pr_err("vNIC BAR0 res magic/version error exp (%lx/%lx) curr (%x/%x)\n", 108 VNIC_RES_MAGIC, VNIC_RES_VERSION, 109 ioread32(&rh->magic), ioread32(&rh->version)); 110 111 return -EINVAL; 112 } 113 114 r = (struct vnic_resource __iomem *)(rh + 1); 115 116 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) { 117 118 u8 bar_num = ioread8(&r->bar); 119 u32 bar_offset = ioread32(&r->bar_offset); 120 u32 count = ioread32(&r->count); 121 u32 len; 122 123 r++; 124 125 if (bar_num >= num_bars) 126 continue; 127 128 if (!bar[bar_num].len || !bar[bar_num].vaddr) 129 continue; 130 131 switch (type) { 132 case RES_TYPE_WQ: 133 case RES_TYPE_RQ: 134 case RES_TYPE_CQ: 135 case RES_TYPE_INTR_CTRL: 136 /* each count is stride bytes long */ 137 len = count * VNIC_RES_STRIDE; 138 if (len + bar_offset > bar->len) { 139 pr_err("vNIC BAR0 resource %d out-of-bounds, offset 0x%x + size 0x%x > bar len 0x%lx\n", 140 type, bar_offset, 141 len, 142 bar->len); 143 144 return -EINVAL; 145 } 146 break; 147 148 case RES_TYPE_INTR_PBA_LEGACY: 149 case RES_TYPE_DEVCMD: 150 case RES_TYPE_DEVCMD2: 151 len = count; 152 break; 153 154 default: 155 continue; 156 } 157 158 vdev->res[type].count = count; 159 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset; 160 } 161 162 return 0; 163 } 164 165 unsigned int svnic_dev_get_res_count(struct vnic_dev *vdev, 166 enum vnic_res_type type) 167 { 168 return vdev->res[type].count; 169 } 170 171 void __iomem *svnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type, 172 unsigned int index) 173 { 174 if (!vdev->res[type].vaddr) 175 return NULL; 176 177 switch (type) { 178 case RES_TYPE_WQ: 179 case RES_TYPE_RQ: 180 case RES_TYPE_CQ: 181 case RES_TYPE_INTR_CTRL: 182 return (char __iomem *)vdev->res[type].vaddr + 183 index * VNIC_RES_STRIDE; 184 185 default: 186 return (char __iomem *)vdev->res[type].vaddr; 187 } 188 } 189 190 unsigned int svnic_dev_desc_ring_size(struct vnic_dev_ring *ring, 191 unsigned int desc_count, 192 unsigned int desc_size) 193 { 194 /* The base address of the desc rings must be 512 byte aligned. 195 * Descriptor count is aligned to groups of 32 descriptors. A 196 * count of 0 means the maximum 4096 descriptors. Descriptor 197 * size is aligned to 16 bytes. 198 */ 199 200 unsigned int count_align = 32; 201 unsigned int desc_align = 16; 202 203 ring->base_align = 512; 204 205 if (desc_count == 0) 206 desc_count = 4096; 207 208 ring->desc_count = ALIGN(desc_count, count_align); 209 210 ring->desc_size = ALIGN(desc_size, desc_align); 211 212 ring->size = ring->desc_count * ring->desc_size; 213 ring->size_unaligned = ring->size + ring->base_align; 214 215 return ring->size_unaligned; 216 } 217 218 void svnic_dev_clear_desc_ring(struct vnic_dev_ring *ring) 219 { 220 memset(ring->descs, 0, ring->size); 221 } 222 223 int svnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring, 224 unsigned int desc_count, unsigned int desc_size) 225 { 226 svnic_dev_desc_ring_size(ring, desc_count, desc_size); 227 228 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev, 229 ring->size_unaligned, 230 &ring->base_addr_unaligned); 231 232 if (!ring->descs_unaligned) { 233 pr_err("Failed to allocate ring (size=%d), aborting\n", 234 (int)ring->size); 235 236 return -ENOMEM; 237 } 238 239 ring->base_addr = ALIGN(ring->base_addr_unaligned, 240 ring->base_align); 241 ring->descs = (u8 *)ring->descs_unaligned + 242 (ring->base_addr - ring->base_addr_unaligned); 243 244 svnic_dev_clear_desc_ring(ring); 245 246 ring->desc_avail = ring->desc_count - 1; 247 248 return 0; 249 } 250 251 void svnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring) 252 { 253 if (ring->descs) { 254 pci_free_consistent(vdev->pdev, 255 ring->size_unaligned, 256 ring->descs_unaligned, 257 ring->base_addr_unaligned); 258 ring->descs = NULL; 259 } 260 } 261 262 static int _svnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 263 int wait) 264 { 265 struct devcmd2_controller *dc2c = vdev->devcmd2; 266 struct devcmd2_result *result = NULL; 267 unsigned int i; 268 int delay; 269 int err; 270 u32 posted; 271 u32 fetch_idx; 272 u32 new_posted; 273 u8 color; 274 275 fetch_idx = ioread32(&dc2c->wq_ctrl->fetch_index); 276 if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone */ 277 /* Hardware surprise removal: return error */ 278 return -ENODEV; 279 } 280 281 posted = ioread32(&dc2c->wq_ctrl->posted_index); 282 283 if (posted == 0xFFFFFFFF) { /* check for hardware gone */ 284 /* Hardware surprise removal: return error */ 285 return -ENODEV; 286 } 287 288 new_posted = (posted + 1) % DEVCMD2_RING_SIZE; 289 if (new_posted == fetch_idx) { 290 pr_err("%s: wq is full while issuing devcmd2 command %d, fetch index: %u, posted index: %u\n", 291 pci_name(vdev->pdev), _CMD_N(cmd), fetch_idx, posted); 292 293 return -EBUSY; 294 } 295 296 dc2c->cmd_ring[posted].cmd = cmd; 297 dc2c->cmd_ring[posted].flags = 0; 298 299 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT)) 300 dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT; 301 302 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) { 303 for (i = 0; i < VNIC_DEVCMD_NARGS; i++) 304 dc2c->cmd_ring[posted].args[i] = vdev->args[i]; 305 } 306 /* Adding write memory barrier prevents compiler and/or CPU 307 * reordering, thus avoiding descriptor posting before 308 * descriptor is initialized. Otherwise, hardware can read 309 * stale descriptor fields. 310 */ 311 wmb(); 312 iowrite32(new_posted, &dc2c->wq_ctrl->posted_index); 313 314 if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT) 315 return 0; 316 317 result = dc2c->result + dc2c->next_result; 318 color = dc2c->color; 319 320 /* 321 * Increment next_result, after posting the devcmd, irrespective of 322 * devcmd result, and it should be done only once. 323 */ 324 dc2c->next_result++; 325 if (dc2c->next_result == dc2c->result_size) { 326 dc2c->next_result = 0; 327 dc2c->color = dc2c->color ? 0 : 1; 328 } 329 330 for (delay = 0; delay < wait; delay++) { 331 udelay(100); 332 if (result->color == color) { 333 if (result->error) { 334 err = (int) result->error; 335 if (err != ERR_ECMDUNKNOWN || 336 cmd != CMD_CAPABILITY) 337 pr_err("Error %d devcmd %d\n", 338 err, _CMD_N(cmd)); 339 340 return err; 341 } 342 if (_CMD_DIR(cmd) & _CMD_DIR_READ) { 343 for (i = 0; i < VNIC_DEVCMD_NARGS; i++) 344 vdev->args[i] = result->results[i]; 345 } 346 347 return 0; 348 } 349 } 350 351 pr_err("Timed out devcmd %d\n", _CMD_N(cmd)); 352 353 return -ETIMEDOUT; 354 } 355 356 static int svnic_dev_init_devcmd2(struct vnic_dev *vdev) 357 { 358 struct devcmd2_controller *dc2c = NULL; 359 unsigned int fetch_idx; 360 int ret; 361 void __iomem *p; 362 363 if (vdev->devcmd2) 364 return 0; 365 366 p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); 367 if (!p) 368 return -ENODEV; 369 370 dc2c = kzalloc(sizeof(*dc2c), GFP_ATOMIC); 371 if (!dc2c) 372 return -ENOMEM; 373 374 vdev->devcmd2 = dc2c; 375 376 dc2c->color = 1; 377 dc2c->result_size = DEVCMD2_RING_SIZE; 378 379 ret = vnic_wq_devcmd2_alloc(vdev, 380 &dc2c->wq, 381 DEVCMD2_RING_SIZE, 382 DEVCMD2_DESC_SIZE); 383 if (ret) 384 goto err_free_devcmd2; 385 386 fetch_idx = ioread32(&dc2c->wq.ctrl->fetch_index); 387 if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone */ 388 /* Hardware surprise removal: reset fetch_index */ 389 fetch_idx = 0; 390 } 391 392 /* 393 * Don't change fetch_index ever and 394 * set posted_index same as fetch_index 395 * when setting up the WQ for devcmd2. 396 */ 397 vnic_wq_init_start(&dc2c->wq, 0, fetch_idx, fetch_idx, 0, 0); 398 svnic_wq_enable(&dc2c->wq); 399 ret = svnic_dev_alloc_desc_ring(vdev, 400 &dc2c->results_ring, 401 DEVCMD2_RING_SIZE, 402 DEVCMD2_DESC_SIZE); 403 if (ret) 404 goto err_free_wq; 405 406 dc2c->result = (struct devcmd2_result *) dc2c->results_ring.descs; 407 dc2c->cmd_ring = (struct vnic_devcmd2 *) dc2c->wq.ring.descs; 408 dc2c->wq_ctrl = dc2c->wq.ctrl; 409 vdev->args[0] = (u64) dc2c->results_ring.base_addr | VNIC_PADDR_TARGET; 410 vdev->args[1] = DEVCMD2_RING_SIZE; 411 412 ret = _svnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, VNIC_DVCMD_TMO); 413 if (ret < 0) 414 goto err_free_desc_ring; 415 416 vdev->devcmd_rtn = &_svnic_dev_cmd2; 417 pr_info("DEVCMD2 Initialized.\n"); 418 419 return ret; 420 421 err_free_desc_ring: 422 svnic_dev_free_desc_ring(vdev, &dc2c->results_ring); 423 424 err_free_wq: 425 svnic_wq_disable(&dc2c->wq); 426 svnic_wq_free(&dc2c->wq); 427 428 err_free_devcmd2: 429 kfree(dc2c); 430 vdev->devcmd2 = NULL; 431 432 return ret; 433 } /* end of svnic_dev_init_devcmd2 */ 434 435 static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev) 436 { 437 struct devcmd2_controller *dc2c = vdev->devcmd2; 438 439 vdev->devcmd2 = NULL; 440 vdev->devcmd_rtn = NULL; 441 442 svnic_dev_free_desc_ring(vdev, &dc2c->results_ring); 443 svnic_wq_disable(&dc2c->wq); 444 svnic_wq_free(&dc2c->wq); 445 kfree(dc2c); 446 } 447 448 int svnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 449 u64 *a0, u64 *a1, int wait) 450 { 451 int err; 452 453 memset(vdev->args, 0, sizeof(vdev->args)); 454 vdev->args[0] = *a0; 455 vdev->args[1] = *a1; 456 457 err = (*vdev->devcmd_rtn)(vdev, cmd, wait); 458 459 *a0 = vdev->args[0]; 460 *a1 = vdev->args[1]; 461 462 return err; 463 } 464 465 int svnic_dev_fw_info(struct vnic_dev *vdev, 466 struct vnic_devcmd_fw_info **fw_info) 467 { 468 u64 a0, a1 = 0; 469 int wait = VNIC_DVCMD_TMO; 470 int err = 0; 471 472 if (!vdev->fw_info) { 473 vdev->fw_info = pci_alloc_consistent(vdev->pdev, 474 sizeof(struct vnic_devcmd_fw_info), 475 &vdev->fw_info_pa); 476 if (!vdev->fw_info) 477 return -ENOMEM; 478 479 a0 = vdev->fw_info_pa; 480 481 /* only get fw_info once and cache it */ 482 err = svnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait); 483 } 484 485 *fw_info = vdev->fw_info; 486 487 return err; 488 } 489 490 int svnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, 491 unsigned int size, void *value) 492 { 493 u64 a0, a1; 494 int wait = VNIC_DVCMD_TMO; 495 int err; 496 497 a0 = offset; 498 a1 = size; 499 500 err = svnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait); 501 502 switch (size) { 503 case 1: 504 *(u8 *)value = (u8)a0; 505 break; 506 case 2: 507 *(u16 *)value = (u16)a0; 508 break; 509 case 4: 510 *(u32 *)value = (u32)a0; 511 break; 512 case 8: 513 *(u64 *)value = a0; 514 break; 515 default: 516 BUG(); 517 break; 518 } 519 520 return err; 521 } 522 523 int svnic_dev_stats_clear(struct vnic_dev *vdev) 524 { 525 u64 a0 = 0, a1 = 0; 526 int wait = VNIC_DVCMD_TMO; 527 528 return svnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait); 529 } 530 531 int svnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats) 532 { 533 u64 a0, a1; 534 int wait = VNIC_DVCMD_TMO; 535 536 if (!vdev->stats) { 537 vdev->stats = pci_alloc_consistent(vdev->pdev, 538 sizeof(struct vnic_stats), &vdev->stats_pa); 539 if (!vdev->stats) 540 return -ENOMEM; 541 } 542 543 *stats = vdev->stats; 544 a0 = vdev->stats_pa; 545 a1 = sizeof(struct vnic_stats); 546 547 return svnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait); 548 } 549 550 int svnic_dev_close(struct vnic_dev *vdev) 551 { 552 u64 a0 = 0, a1 = 0; 553 int wait = VNIC_DVCMD_TMO; 554 555 return svnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait); 556 } 557 558 int svnic_dev_enable_wait(struct vnic_dev *vdev) 559 { 560 u64 a0 = 0, a1 = 0; 561 int wait = VNIC_DVCMD_TMO; 562 int err = 0; 563 564 err = svnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait); 565 if (err == ERR_ECMDUNKNOWN) 566 return svnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait); 567 568 return err; 569 } 570 571 int svnic_dev_disable(struct vnic_dev *vdev) 572 { 573 u64 a0 = 0, a1 = 0; 574 int wait = VNIC_DVCMD_TMO; 575 576 return svnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait); 577 } 578 579 int svnic_dev_open(struct vnic_dev *vdev, int arg) 580 { 581 u64 a0 = (u32)arg, a1 = 0; 582 int wait = VNIC_DVCMD_TMO; 583 584 return svnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait); 585 } 586 587 int svnic_dev_open_done(struct vnic_dev *vdev, int *done) 588 { 589 u64 a0 = 0, a1 = 0; 590 int wait = VNIC_DVCMD_TMO; 591 int err; 592 593 *done = 0; 594 595 err = svnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait); 596 if (err) 597 return err; 598 599 *done = (a0 == 0); 600 601 return 0; 602 } 603 604 int svnic_dev_notify_set(struct vnic_dev *vdev, u16 intr) 605 { 606 u64 a0, a1; 607 int wait = VNIC_DVCMD_TMO; 608 609 if (!vdev->notify) { 610 vdev->notify = pci_alloc_consistent(vdev->pdev, 611 sizeof(struct vnic_devcmd_notify), 612 &vdev->notify_pa); 613 if (!vdev->notify) 614 return -ENOMEM; 615 } 616 617 a0 = vdev->notify_pa; 618 a1 = ((u64)intr << 32) & VNIC_NOTIFY_INTR_MASK; 619 a1 += sizeof(struct vnic_devcmd_notify); 620 621 return svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); 622 } 623 624 void svnic_dev_notify_unset(struct vnic_dev *vdev) 625 { 626 u64 a0, a1; 627 int wait = VNIC_DVCMD_TMO; 628 629 a0 = 0; /* paddr = 0 to unset notify buffer */ 630 a1 = VNIC_NOTIFY_INTR_MASK; /* intr num = -1 to unreg for intr */ 631 a1 += sizeof(struct vnic_devcmd_notify); 632 633 svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); 634 } 635 636 static int vnic_dev_notify_ready(struct vnic_dev *vdev) 637 { 638 u32 *words; 639 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4; 640 unsigned int i; 641 u32 csum; 642 643 if (!vdev->notify) 644 return 0; 645 646 do { 647 csum = 0; 648 memcpy(&vdev->notify_copy, vdev->notify, 649 sizeof(struct vnic_devcmd_notify)); 650 words = (u32 *)&vdev->notify_copy; 651 for (i = 1; i < nwords; i++) 652 csum += words[i]; 653 } while (csum != words[0]); 654 655 return 1; 656 } 657 658 int svnic_dev_init(struct vnic_dev *vdev, int arg) 659 { 660 u64 a0 = (u32)arg, a1 = 0; 661 int wait = VNIC_DVCMD_TMO; 662 663 return svnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait); 664 } 665 666 int svnic_dev_link_status(struct vnic_dev *vdev) 667 { 668 if (vdev->linkstatus) 669 return *vdev->linkstatus; 670 671 if (!vnic_dev_notify_ready(vdev)) 672 return 0; 673 674 return vdev->notify_copy.link_state; 675 } 676 677 u32 svnic_dev_link_down_cnt(struct vnic_dev *vdev) 678 { 679 if (!vnic_dev_notify_ready(vdev)) 680 return 0; 681 682 return vdev->notify_copy.link_down_cnt; 683 } 684 685 void svnic_dev_set_intr_mode(struct vnic_dev *vdev, 686 enum vnic_dev_intr_mode intr_mode) 687 { 688 vdev->intr_mode = intr_mode; 689 } 690 691 enum vnic_dev_intr_mode svnic_dev_get_intr_mode(struct vnic_dev *vdev) 692 { 693 return vdev->intr_mode; 694 } 695 696 void svnic_dev_unregister(struct vnic_dev *vdev) 697 { 698 if (vdev) { 699 if (vdev->notify) 700 pci_free_consistent(vdev->pdev, 701 sizeof(struct vnic_devcmd_notify), 702 vdev->notify, 703 vdev->notify_pa); 704 if (vdev->linkstatus) 705 pci_free_consistent(vdev->pdev, 706 sizeof(u32), 707 vdev->linkstatus, 708 vdev->linkstatus_pa); 709 if (vdev->stats) 710 pci_free_consistent(vdev->pdev, 711 sizeof(struct vnic_stats), 712 vdev->stats, vdev->stats_pa); 713 if (vdev->fw_info) 714 pci_free_consistent(vdev->pdev, 715 sizeof(struct vnic_devcmd_fw_info), 716 vdev->fw_info, vdev->fw_info_pa); 717 if (vdev->devcmd2) 718 vnic_dev_deinit_devcmd2(vdev); 719 kfree(vdev); 720 } 721 } 722 723 struct vnic_dev *svnic_dev_alloc_discover(struct vnic_dev *vdev, 724 void *priv, 725 struct pci_dev *pdev, 726 struct vnic_dev_bar *bar, 727 unsigned int num_bars) 728 { 729 if (!vdev) { 730 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC); 731 if (!vdev) 732 return NULL; 733 } 734 735 vdev->priv = priv; 736 vdev->pdev = pdev; 737 738 if (vnic_dev_discover_res(vdev, bar, num_bars)) 739 goto err_out; 740 741 return vdev; 742 743 err_out: 744 svnic_dev_unregister(vdev); 745 746 return NULL; 747 } /* end of svnic_dev_alloc_discover */ 748 749 /* 750 * fallback option is left to keep the interface common for other vnics. 751 */ 752 int svnic_dev_cmd_init(struct vnic_dev *vdev, int fallback) 753 { 754 int err = -ENODEV; 755 void __iomem *p; 756 757 p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); 758 if (p) 759 err = svnic_dev_init_devcmd2(vdev); 760 else 761 pr_err("DEVCMD2 resource not found.\n"); 762 763 return err; 764 } /* end of svnic_dev_cmd_init */ 765