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 34struct 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 45struct vnic_res { 46 void __iomem *vaddr; 47 unsigned int count; 48}; 49 50struct 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 77void *svnic_dev_priv(struct vnic_dev *vdev) 78{ 79 return vdev->priv; 80} 81 82static 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 165unsigned 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 171void __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 190unsigned 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 218void svnic_dev_clear_desc_ring(struct vnic_dev_ring *ring) 219{ 220 memset(ring->descs, 0, ring->size); 221} 222 223int 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 = dma_alloc_coherent(&vdev->pdev->dev, 229 ring->size_unaligned, &ring->base_addr_unaligned, 230 GFP_KERNEL); 231 if (!ring->descs_unaligned) { 232 pr_err("Failed to allocate ring (size=%d), aborting\n", 233 (int)ring->size); 234 235 return -ENOMEM; 236 } 237 238 ring->base_addr = ALIGN(ring->base_addr_unaligned, 239 ring->base_align); 240 ring->descs = (u8 *)ring->descs_unaligned + 241 (ring->base_addr - ring->base_addr_unaligned); 242 243 svnic_dev_clear_desc_ring(ring); 244 245 ring->desc_avail = ring->desc_count - 1; 246 247 return 0; 248} 249 250void svnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring) 251{ 252 if (ring->descs) { 253 dma_free_coherent(&vdev->pdev->dev, 254 ring->size_unaligned, 255 ring->descs_unaligned, 256 ring->base_addr_unaligned); 257 ring->descs = NULL; 258 } 259} 260 261static int _svnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 262 int wait) 263{ 264 struct devcmd2_controller *dc2c = vdev->devcmd2; 265 struct devcmd2_result *result = NULL; 266 unsigned int i; 267 int delay; 268 int err; 269 u32 posted; 270 u32 fetch_idx; 271 u32 new_posted; 272 u8 color; 273 274 fetch_idx = ioread32(&dc2c->wq_ctrl->fetch_index); 275 if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone */ 276 /* Hardware surprise removal: return error */ 277 return -ENODEV; 278 } 279 280 posted = ioread32(&dc2c->wq_ctrl->posted_index); 281 282 if (posted == 0xFFFFFFFF) { /* check for hardware gone */ 283 /* Hardware surprise removal: return error */ 284 return -ENODEV; 285 } 286 287 new_posted = (posted + 1) % DEVCMD2_RING_SIZE; 288 if (new_posted == fetch_idx) { 289 pr_err("%s: wq is full while issuing devcmd2 command %d, fetch index: %u, posted index: %u\n", 290 pci_name(vdev->pdev), _CMD_N(cmd), fetch_idx, posted); 291 292 return -EBUSY; 293 } 294 295 dc2c->cmd_ring[posted].cmd = cmd; 296 dc2c->cmd_ring[posted].flags = 0; 297 298 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT)) 299 dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT; 300 301 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) { 302 for (i = 0; i < VNIC_DEVCMD_NARGS; i++) 303 dc2c->cmd_ring[posted].args[i] = vdev->args[i]; 304 } 305 /* Adding write memory barrier prevents compiler and/or CPU 306 * reordering, thus avoiding descriptor posting before 307 * descriptor is initialized. Otherwise, hardware can read 308 * stale descriptor fields. 309 */ 310 wmb(); 311 iowrite32(new_posted, &dc2c->wq_ctrl->posted_index); 312 313 if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT) 314 return 0; 315 316 result = dc2c->result + dc2c->next_result; 317 color = dc2c->color; 318 319 /* 320 * Increment next_result, after posting the devcmd, irrespective of 321 * devcmd result, and it should be done only once. 322 */ 323 dc2c->next_result++; 324 if (dc2c->next_result == dc2c->result_size) { 325 dc2c->next_result = 0; 326 dc2c->color = dc2c->color ? 0 : 1; 327 } 328 329 for (delay = 0; delay < wait; delay++) { 330 udelay(100); 331 if (result->color == color) { 332 if (result->error) { 333 err = (int) result->error; 334 if (err != ERR_ECMDUNKNOWN || 335 cmd != CMD_CAPABILITY) 336 pr_err("Error %d devcmd %d\n", 337 err, _CMD_N(cmd)); 338 339 return err; 340 } 341 if (_CMD_DIR(cmd) & _CMD_DIR_READ) { 342 for (i = 0; i < VNIC_DEVCMD_NARGS; i++) 343 vdev->args[i] = result->results[i]; 344 } 345 346 return 0; 347 } 348 } 349 350 pr_err("Timed out devcmd %d\n", _CMD_N(cmd)); 351 352 return -ETIMEDOUT; 353} 354 355static int svnic_dev_init_devcmd2(struct vnic_dev *vdev) 356{ 357 struct devcmd2_controller *dc2c = NULL; 358 unsigned int fetch_idx; 359 int ret; 360 void __iomem *p; 361 362 if (vdev->devcmd2) 363 return 0; 364 365 p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); 366 if (!p) 367 return -ENODEV; 368 369 dc2c = kzalloc(sizeof(*dc2c), GFP_ATOMIC); 370 if (!dc2c) 371 return -ENOMEM; 372 373 vdev->devcmd2 = dc2c; 374 375 dc2c->color = 1; 376 dc2c->result_size = DEVCMD2_RING_SIZE; 377 378 ret = vnic_wq_devcmd2_alloc(vdev, 379 &dc2c->wq, 380 DEVCMD2_RING_SIZE, 381 DEVCMD2_DESC_SIZE); 382 if (ret) 383 goto err_free_devcmd2; 384 385 fetch_idx = ioread32(&dc2c->wq.ctrl->fetch_index); 386 if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone */ 387 /* Hardware surprise removal: reset fetch_index */ 388 fetch_idx = 0; 389 } 390 391 /* 392 * Don't change fetch_index ever and 393 * set posted_index same as fetch_index 394 * when setting up the WQ for devcmd2. 395 */ 396 vnic_wq_init_start(&dc2c->wq, 0, fetch_idx, fetch_idx, 0, 0); 397 svnic_wq_enable(&dc2c->wq); 398 ret = svnic_dev_alloc_desc_ring(vdev, 399 &dc2c->results_ring, 400 DEVCMD2_RING_SIZE, 401 DEVCMD2_DESC_SIZE); 402 if (ret) 403 goto err_free_wq; 404 405 dc2c->result = (struct devcmd2_result *) dc2c->results_ring.descs; 406 dc2c->cmd_ring = (struct vnic_devcmd2 *) dc2c->wq.ring.descs; 407 dc2c->wq_ctrl = dc2c->wq.ctrl; 408 vdev->args[0] = (u64) dc2c->results_ring.base_addr | VNIC_PADDR_TARGET; 409 vdev->args[1] = DEVCMD2_RING_SIZE; 410 411 ret = _svnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, VNIC_DVCMD_TMO); 412 if (ret < 0) 413 goto err_free_desc_ring; 414 415 vdev->devcmd_rtn = &_svnic_dev_cmd2; 416 pr_info("DEVCMD2 Initialized.\n"); 417 418 return ret; 419 420err_free_desc_ring: 421 svnic_dev_free_desc_ring(vdev, &dc2c->results_ring); 422 423err_free_wq: 424 svnic_wq_disable(&dc2c->wq); 425 svnic_wq_free(&dc2c->wq); 426 427err_free_devcmd2: 428 kfree(dc2c); 429 vdev->devcmd2 = NULL; 430 431 return ret; 432} /* end of svnic_dev_init_devcmd2 */ 433 434static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev) 435{ 436 struct devcmd2_controller *dc2c = vdev->devcmd2; 437 438 vdev->devcmd2 = NULL; 439 vdev->devcmd_rtn = NULL; 440 441 svnic_dev_free_desc_ring(vdev, &dc2c->results_ring); 442 svnic_wq_disable(&dc2c->wq); 443 svnic_wq_free(&dc2c->wq); 444 kfree(dc2c); 445} 446 447int svnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, 448 u64 *a0, u64 *a1, int wait) 449{ 450 int err; 451 452 memset(vdev->args, 0, sizeof(vdev->args)); 453 vdev->args[0] = *a0; 454 vdev->args[1] = *a1; 455 456 err = (*vdev->devcmd_rtn)(vdev, cmd, wait); 457 458 *a0 = vdev->args[0]; 459 *a1 = vdev->args[1]; 460 461 return err; 462} 463 464int svnic_dev_fw_info(struct vnic_dev *vdev, 465 struct vnic_devcmd_fw_info **fw_info) 466{ 467 u64 a0, a1 = 0; 468 int wait = VNIC_DVCMD_TMO; 469 int err = 0; 470 471 if (!vdev->fw_info) { 472 vdev->fw_info = dma_alloc_coherent(&vdev->pdev->dev, 473 sizeof(struct vnic_devcmd_fw_info), 474 &vdev->fw_info_pa, GFP_KERNEL); 475 if (!vdev->fw_info) 476 return -ENOMEM; 477 478 a0 = vdev->fw_info_pa; 479 480 /* only get fw_info once and cache it */ 481 err = svnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait); 482 } 483 484 *fw_info = vdev->fw_info; 485 486 return err; 487} 488 489int svnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, 490 unsigned int size, void *value) 491{ 492 u64 a0, a1; 493 int wait = VNIC_DVCMD_TMO; 494 int err; 495 496 a0 = offset; 497 a1 = size; 498 499 err = svnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait); 500 501 switch (size) { 502 case 1: 503 *(u8 *)value = (u8)a0; 504 break; 505 case 2: 506 *(u16 *)value = (u16)a0; 507 break; 508 case 4: 509 *(u32 *)value = (u32)a0; 510 break; 511 case 8: 512 *(u64 *)value = a0; 513 break; 514 default: 515 BUG(); 516 break; 517 } 518 519 return err; 520} 521 522int svnic_dev_stats_clear(struct vnic_dev *vdev) 523{ 524 u64 a0 = 0, a1 = 0; 525 int wait = VNIC_DVCMD_TMO; 526 527 return svnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait); 528} 529 530int svnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats) 531{ 532 u64 a0, a1; 533 int wait = VNIC_DVCMD_TMO; 534 535 if (!vdev->stats) { 536 vdev->stats = dma_alloc_coherent(&vdev->pdev->dev, 537 sizeof(struct vnic_stats), &vdev->stats_pa, GFP_KERNEL); 538 if (!vdev->stats) 539 return -ENOMEM; 540 } 541 542 *stats = vdev->stats; 543 a0 = vdev->stats_pa; 544 a1 = sizeof(struct vnic_stats); 545 546 return svnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait); 547} 548 549int svnic_dev_close(struct vnic_dev *vdev) 550{ 551 u64 a0 = 0, a1 = 0; 552 int wait = VNIC_DVCMD_TMO; 553 554 return svnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait); 555} 556 557int svnic_dev_enable_wait(struct vnic_dev *vdev) 558{ 559 u64 a0 = 0, a1 = 0; 560 int wait = VNIC_DVCMD_TMO; 561 int err = 0; 562 563 err = svnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait); 564 if (err == ERR_ECMDUNKNOWN) 565 return svnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait); 566 567 return err; 568} 569 570int svnic_dev_disable(struct vnic_dev *vdev) 571{ 572 u64 a0 = 0, a1 = 0; 573 int wait = VNIC_DVCMD_TMO; 574 575 return svnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait); 576} 577 578int svnic_dev_open(struct vnic_dev *vdev, int arg) 579{ 580 u64 a0 = (u32)arg, a1 = 0; 581 int wait = VNIC_DVCMD_TMO; 582 583 return svnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait); 584} 585 586int svnic_dev_open_done(struct vnic_dev *vdev, int *done) 587{ 588 u64 a0 = 0, a1 = 0; 589 int wait = VNIC_DVCMD_TMO; 590 int err; 591 592 *done = 0; 593 594 err = svnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait); 595 if (err) 596 return err; 597 598 *done = (a0 == 0); 599 600 return 0; 601} 602 603int svnic_dev_notify_set(struct vnic_dev *vdev, u16 intr) 604{ 605 u64 a0, a1; 606 int wait = VNIC_DVCMD_TMO; 607 608 if (!vdev->notify) { 609 vdev->notify = dma_alloc_coherent(&vdev->pdev->dev, 610 sizeof(struct vnic_devcmd_notify), 611 &vdev->notify_pa, GFP_KERNEL); 612 if (!vdev->notify) 613 return -ENOMEM; 614 } 615 616 a0 = vdev->notify_pa; 617 a1 = ((u64)intr << 32) & VNIC_NOTIFY_INTR_MASK; 618 a1 += sizeof(struct vnic_devcmd_notify); 619 620 return svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); 621} 622 623void svnic_dev_notify_unset(struct vnic_dev *vdev) 624{ 625 u64 a0, a1; 626 int wait = VNIC_DVCMD_TMO; 627 628 a0 = 0; /* paddr = 0 to unset notify buffer */ 629 a1 = VNIC_NOTIFY_INTR_MASK; /* intr num = -1 to unreg for intr */ 630 a1 += sizeof(struct vnic_devcmd_notify); 631 632 svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); 633} 634 635static int vnic_dev_notify_ready(struct vnic_dev *vdev) 636{ 637 u32 *words; 638 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4; 639 unsigned int i; 640 u32 csum; 641 642 if (!vdev->notify) 643 return 0; 644 645 do { 646 csum = 0; 647 memcpy(&vdev->notify_copy, vdev->notify, 648 sizeof(struct vnic_devcmd_notify)); 649 words = (u32 *)&vdev->notify_copy; 650 for (i = 1; i < nwords; i++) 651 csum += words[i]; 652 } while (csum != words[0]); 653 654 return 1; 655} 656 657int svnic_dev_init(struct vnic_dev *vdev, int arg) 658{ 659 u64 a0 = (u32)arg, a1 = 0; 660 int wait = VNIC_DVCMD_TMO; 661 662 return svnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait); 663} 664 665int svnic_dev_link_status(struct vnic_dev *vdev) 666{ 667 if (vdev->linkstatus) 668 return *vdev->linkstatus; 669 670 if (!vnic_dev_notify_ready(vdev)) 671 return 0; 672 673 return vdev->notify_copy.link_state; 674} 675 676u32 svnic_dev_link_down_cnt(struct vnic_dev *vdev) 677{ 678 if (!vnic_dev_notify_ready(vdev)) 679 return 0; 680 681 return vdev->notify_copy.link_down_cnt; 682} 683 684void svnic_dev_set_intr_mode(struct vnic_dev *vdev, 685 enum vnic_dev_intr_mode intr_mode) 686{ 687 vdev->intr_mode = intr_mode; 688} 689 690enum vnic_dev_intr_mode svnic_dev_get_intr_mode(struct vnic_dev *vdev) 691{ 692 return vdev->intr_mode; 693} 694 695void svnic_dev_unregister(struct vnic_dev *vdev) 696{ 697 if (vdev) { 698 if (vdev->notify) 699 dma_free_coherent(&vdev->pdev->dev, 700 sizeof(struct vnic_devcmd_notify), 701 vdev->notify, 702 vdev->notify_pa); 703 if (vdev->linkstatus) 704 dma_free_coherent(&vdev->pdev->dev, 705 sizeof(u32), 706 vdev->linkstatus, 707 vdev->linkstatus_pa); 708 if (vdev->stats) 709 dma_free_coherent(&vdev->pdev->dev, 710 sizeof(struct vnic_stats), 711 vdev->stats, vdev->stats_pa); 712 if (vdev->fw_info) 713 dma_free_coherent(&vdev->pdev->dev, 714 sizeof(struct vnic_devcmd_fw_info), 715 vdev->fw_info, vdev->fw_info_pa); 716 if (vdev->devcmd2) 717 vnic_dev_deinit_devcmd2(vdev); 718 kfree(vdev); 719 } 720} 721 722struct vnic_dev *svnic_dev_alloc_discover(struct vnic_dev *vdev, 723 void *priv, 724 struct pci_dev *pdev, 725 struct vnic_dev_bar *bar, 726 unsigned int num_bars) 727{ 728 if (!vdev) { 729 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC); 730 if (!vdev) 731 return NULL; 732 } 733 734 vdev->priv = priv; 735 vdev->pdev = pdev; 736 737 if (vnic_dev_discover_res(vdev, bar, num_bars)) 738 goto err_out; 739 740 return vdev; 741 742err_out: 743 svnic_dev_unregister(vdev); 744 745 return NULL; 746} /* end of svnic_dev_alloc_discover */ 747 748/* 749 * fallback option is left to keep the interface common for other vnics. 750 */ 751int svnic_dev_cmd_init(struct vnic_dev *vdev, int fallback) 752{ 753 int err = -ENODEV; 754 void __iomem *p; 755 756 p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); 757 if (p) 758 err = svnic_dev_init_devcmd2(vdev); 759 else 760 pr_err("DEVCMD2 resource not found.\n"); 761 762 return err; 763} /* end of svnic_dev_cmd_init */ 764