1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5 #include <string.h> 6 #include <dirent.h> 7 8 #include <rte_log.h> 9 #include <rte_bus.h> 10 #include <rte_pci.h> 11 #include <rte_bus_pci.h> 12 #include <rte_malloc.h> 13 #include <rte_devargs.h> 14 #include <rte_memcpy.h> 15 #include <rte_vfio.h> 16 17 #include "eal_filesystem.h" 18 19 #include "private.h" 20 #include "pci_init.h" 21 22 /** 23 * @file 24 * PCI probing under linux 25 * 26 * This code is used to simulate a PCI probe by parsing information in sysfs. 27 * When a registered device matches a driver, it is then initialized with 28 * IGB_UIO driver (or doesn't initialize, if the device wasn't bound to it). 29 */ 30 31 extern struct rte_pci_bus rte_pci_bus; 32 33 static int 34 pci_get_kernel_driver_by_path(const char *filename, char *dri_name, 35 size_t len) 36 { 37 int count; 38 char path[PATH_MAX]; 39 char *name; 40 41 if (!filename || !dri_name) 42 return -1; 43 44 count = readlink(filename, path, PATH_MAX); 45 if (count >= PATH_MAX) 46 return -1; 47 48 /* For device does not have a driver */ 49 if (count < 0) 50 return 1; 51 52 path[count] = '\0'; 53 54 name = strrchr(path, '/'); 55 if (name) { 56 strlcpy(dri_name, name + 1, len); 57 return 0; 58 } 59 60 return -1; 61 } 62 63 /* Map pci device */ 64 int 65 rte_pci_map_device(struct rte_pci_device *dev) 66 { 67 int ret = -1; 68 69 /* try mapping the NIC resources using VFIO if it exists */ 70 switch (dev->kdrv) { 71 case RTE_KDRV_VFIO: 72 #ifdef VFIO_PRESENT 73 if (pci_vfio_is_enabled()) 74 ret = pci_vfio_map_resource(dev); 75 #endif 76 break; 77 case RTE_KDRV_IGB_UIO: 78 case RTE_KDRV_UIO_GENERIC: 79 if (rte_eal_using_phys_addrs()) { 80 /* map resources for devices that use uio */ 81 ret = pci_uio_map_resource(dev); 82 } 83 break; 84 default: 85 RTE_LOG(DEBUG, EAL, 86 " Not managed by a supported kernel driver, skipped\n"); 87 ret = 1; 88 break; 89 } 90 91 return ret; 92 } 93 94 /* Unmap pci device */ 95 void 96 rte_pci_unmap_device(struct rte_pci_device *dev) 97 { 98 /* try unmapping the NIC resources using VFIO if it exists */ 99 switch (dev->kdrv) { 100 case RTE_KDRV_VFIO: 101 #ifdef VFIO_PRESENT 102 if (pci_vfio_is_enabled()) 103 pci_vfio_unmap_resource(dev); 104 #endif 105 break; 106 case RTE_KDRV_IGB_UIO: 107 case RTE_KDRV_UIO_GENERIC: 108 /* unmap resources for devices that use uio */ 109 pci_uio_unmap_resource(dev); 110 break; 111 default: 112 RTE_LOG(DEBUG, EAL, 113 " Not managed by a supported kernel driver, skipped\n"); 114 break; 115 } 116 } 117 118 static int 119 find_max_end_va(const struct rte_memseg_list *msl, void *arg) 120 { 121 size_t sz = msl->len; 122 void *end_va = RTE_PTR_ADD(msl->base_va, sz); 123 void **max_va = arg; 124 125 if (*max_va < end_va) 126 *max_va = end_va; 127 return 0; 128 } 129 130 void * 131 pci_find_max_end_va(void) 132 { 133 void *va = NULL; 134 135 rte_memseg_list_walk(find_max_end_va, &va); 136 return va; 137 } 138 139 140 /* parse one line of the "resource" sysfs file (note that the 'line' 141 * string is modified) 142 */ 143 int 144 pci_parse_one_sysfs_resource(char *line, size_t len, uint64_t *phys_addr, 145 uint64_t *end_addr, uint64_t *flags) 146 { 147 union pci_resource_info { 148 struct { 149 char *phys_addr; 150 char *end_addr; 151 char *flags; 152 }; 153 char *ptrs[PCI_RESOURCE_FMT_NVAL]; 154 } res_info; 155 156 if (rte_strsplit(line, len, res_info.ptrs, 3, ' ') != 3) { 157 RTE_LOG(ERR, EAL, 158 "%s(): bad resource format\n", __func__); 159 return -1; 160 } 161 errno = 0; 162 *phys_addr = strtoull(res_info.phys_addr, NULL, 16); 163 *end_addr = strtoull(res_info.end_addr, NULL, 16); 164 *flags = strtoull(res_info.flags, NULL, 16); 165 if (errno != 0) { 166 RTE_LOG(ERR, EAL, 167 "%s(): bad resource format\n", __func__); 168 return -1; 169 } 170 171 return 0; 172 } 173 174 /* parse the "resource" sysfs file */ 175 static int 176 pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev) 177 { 178 FILE *f; 179 char buf[BUFSIZ]; 180 int i; 181 uint64_t phys_addr, end_addr, flags; 182 183 f = fopen(filename, "r"); 184 if (f == NULL) { 185 RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n"); 186 return -1; 187 } 188 189 for (i = 0; i<PCI_MAX_RESOURCE; i++) { 190 191 if (fgets(buf, sizeof(buf), f) == NULL) { 192 RTE_LOG(ERR, EAL, 193 "%s(): cannot read resource\n", __func__); 194 goto error; 195 } 196 if (pci_parse_one_sysfs_resource(buf, sizeof(buf), &phys_addr, 197 &end_addr, &flags) < 0) 198 goto error; 199 200 if (flags & IORESOURCE_MEM) { 201 dev->mem_resource[i].phys_addr = phys_addr; 202 dev->mem_resource[i].len = end_addr - phys_addr + 1; 203 /* not mapped for now */ 204 dev->mem_resource[i].addr = NULL; 205 } 206 } 207 fclose(f); 208 return 0; 209 210 error: 211 fclose(f); 212 return -1; 213 } 214 215 /* Scan one pci sysfs entry, and fill the devices list from it. */ 216 static int 217 pci_scan_one(const char *dirname, const struct rte_pci_addr *addr) 218 { 219 char filename[PATH_MAX]; 220 unsigned long tmp; 221 struct rte_pci_device *dev; 222 char driver[PATH_MAX]; 223 int ret; 224 225 dev = malloc(sizeof(*dev)); 226 if (dev == NULL) 227 return -1; 228 229 memset(dev, 0, sizeof(*dev)); 230 dev->device.bus = &rte_pci_bus.bus; 231 dev->addr = *addr; 232 233 /* get vendor id */ 234 snprintf(filename, sizeof(filename), "%s/vendor", dirname); 235 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 236 free(dev); 237 return -1; 238 } 239 dev->id.vendor_id = (uint16_t)tmp; 240 241 /* get device id */ 242 snprintf(filename, sizeof(filename), "%s/device", dirname); 243 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 244 free(dev); 245 return -1; 246 } 247 dev->id.device_id = (uint16_t)tmp; 248 249 /* get subsystem_vendor id */ 250 snprintf(filename, sizeof(filename), "%s/subsystem_vendor", 251 dirname); 252 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 253 free(dev); 254 return -1; 255 } 256 dev->id.subsystem_vendor_id = (uint16_t)tmp; 257 258 /* get subsystem_device id */ 259 snprintf(filename, sizeof(filename), "%s/subsystem_device", 260 dirname); 261 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 262 free(dev); 263 return -1; 264 } 265 dev->id.subsystem_device_id = (uint16_t)tmp; 266 267 /* get class_id */ 268 snprintf(filename, sizeof(filename), "%s/class", 269 dirname); 270 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 271 free(dev); 272 return -1; 273 } 274 /* the least 24 bits are valid: class, subclass, program interface */ 275 dev->id.class_id = (uint32_t)tmp & RTE_CLASS_ANY_ID; 276 277 /* get max_vfs */ 278 dev->max_vfs = 0; 279 snprintf(filename, sizeof(filename), "%s/max_vfs", dirname); 280 if (!access(filename, F_OK) && 281 eal_parse_sysfs_value(filename, &tmp) == 0) 282 dev->max_vfs = (uint16_t)tmp; 283 else { 284 /* for non igb_uio driver, need kernel version >= 3.8 */ 285 snprintf(filename, sizeof(filename), 286 "%s/sriov_numvfs", dirname); 287 if (!access(filename, F_OK) && 288 eal_parse_sysfs_value(filename, &tmp) == 0) 289 dev->max_vfs = (uint16_t)tmp; 290 } 291 292 /* get numa node, default to 0 if not present */ 293 snprintf(filename, sizeof(filename), "%s/numa_node", 294 dirname); 295 296 if (access(filename, F_OK) != -1) { 297 if (eal_parse_sysfs_value(filename, &tmp) == 0) 298 dev->device.numa_node = tmp; 299 else 300 dev->device.numa_node = -1; 301 } else { 302 dev->device.numa_node = 0; 303 } 304 305 pci_name_set(dev); 306 307 /* parse resources */ 308 snprintf(filename, sizeof(filename), "%s/resource", dirname); 309 if (pci_parse_sysfs_resource(filename, dev) < 0) { 310 RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__); 311 free(dev); 312 return -1; 313 } 314 315 /* parse driver */ 316 snprintf(filename, sizeof(filename), "%s/driver", dirname); 317 ret = pci_get_kernel_driver_by_path(filename, driver, sizeof(driver)); 318 if (ret < 0) { 319 RTE_LOG(ERR, EAL, "Fail to get kernel driver\n"); 320 free(dev); 321 return -1; 322 } 323 324 if (!ret) { 325 if (!strcmp(driver, "vfio-pci")) 326 dev->kdrv = RTE_KDRV_VFIO; 327 else if (!strcmp(driver, "igb_uio")) 328 dev->kdrv = RTE_KDRV_IGB_UIO; 329 else if (!strcmp(driver, "uio_pci_generic")) 330 dev->kdrv = RTE_KDRV_UIO_GENERIC; 331 else 332 dev->kdrv = RTE_KDRV_UNKNOWN; 333 } else 334 dev->kdrv = RTE_KDRV_NONE; 335 336 /* device is valid, add in list (sorted) */ 337 if (TAILQ_EMPTY(&rte_pci_bus.device_list)) { 338 rte_pci_add_device(dev); 339 } else { 340 struct rte_pci_device *dev2; 341 int ret; 342 343 TAILQ_FOREACH(dev2, &rte_pci_bus.device_list, next) { 344 ret = rte_pci_addr_cmp(&dev->addr, &dev2->addr); 345 if (ret > 0) 346 continue; 347 348 if (ret < 0) { 349 rte_pci_insert_device(dev2, dev); 350 } else { /* already registered */ 351 if (!rte_dev_is_probed(&dev2->device)) { 352 dev2->kdrv = dev->kdrv; 353 dev2->max_vfs = dev->max_vfs; 354 pci_name_set(dev2); 355 memmove(dev2->mem_resource, 356 dev->mem_resource, 357 sizeof(dev->mem_resource)); 358 } else { 359 /** 360 * If device is plugged and driver is 361 * probed already, (This happens when 362 * we call rte_dev_probe which will 363 * scan all device on the bus) we don't 364 * need to do anything here unless... 365 **/ 366 if (dev2->kdrv != dev->kdrv || 367 dev2->max_vfs != dev->max_vfs) 368 /* 369 * This should not happens. 370 * But it is still possible if 371 * we unbind a device from 372 * vfio or uio before hotplug 373 * remove and rebind it with 374 * a different configure. 375 * So we just print out the 376 * error as an alarm. 377 */ 378 RTE_LOG(ERR, EAL, "Unexpected device scan at %s!\n", 379 filename); 380 } 381 free(dev); 382 } 383 return 0; 384 } 385 386 rte_pci_add_device(dev); 387 } 388 389 return 0; 390 } 391 392 int 393 pci_update_device(const struct rte_pci_addr *addr) 394 { 395 char filename[PATH_MAX]; 396 397 snprintf(filename, sizeof(filename), "%s/" PCI_PRI_FMT, 398 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, 399 addr->function); 400 401 return pci_scan_one(filename, addr); 402 } 403 404 /* 405 * split up a pci address into its constituent parts. 406 */ 407 static int 408 parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr) 409 { 410 /* first split on ':' */ 411 union splitaddr { 412 struct { 413 char *domain; 414 char *bus; 415 char *devid; 416 char *function; 417 }; 418 char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */ 419 } splitaddr; 420 421 char *buf_copy = strndup(buf, bufsize); 422 if (buf_copy == NULL) 423 return -1; 424 425 if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':') 426 != PCI_FMT_NVAL - 1) 427 goto error; 428 /* final split is on '.' between devid and function */ 429 splitaddr.function = strchr(splitaddr.devid,'.'); 430 if (splitaddr.function == NULL) 431 goto error; 432 *splitaddr.function++ = '\0'; 433 434 /* now convert to int values */ 435 errno = 0; 436 addr->domain = strtoul(splitaddr.domain, NULL, 16); 437 addr->bus = strtoul(splitaddr.bus, NULL, 16); 438 addr->devid = strtoul(splitaddr.devid, NULL, 16); 439 addr->function = strtoul(splitaddr.function, NULL, 10); 440 if (errno != 0) 441 goto error; 442 443 free(buf_copy); /* free the copy made with strdup */ 444 return 0; 445 error: 446 free(buf_copy); 447 return -1; 448 } 449 450 /* 451 * Scan the content of the PCI bus, and the devices in the devices 452 * list 453 */ 454 int 455 rte_pci_scan(void) 456 { 457 struct dirent *e; 458 DIR *dir; 459 char dirname[PATH_MAX]; 460 struct rte_pci_addr addr; 461 462 /* for debug purposes, PCI can be disabled */ 463 if (!rte_eal_has_pci()) 464 return 0; 465 466 #ifdef VFIO_PRESENT 467 if (!pci_vfio_is_enabled()) 468 RTE_LOG(DEBUG, EAL, "VFIO PCI modules not loaded\n"); 469 #endif 470 471 dir = opendir(rte_pci_get_sysfs_path()); 472 if (dir == NULL) { 473 RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n", 474 __func__, strerror(errno)); 475 return -1; 476 } 477 478 while ((e = readdir(dir)) != NULL) { 479 if (e->d_name[0] == '.') 480 continue; 481 482 if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0) 483 continue; 484 485 snprintf(dirname, sizeof(dirname), "%s/%s", 486 rte_pci_get_sysfs_path(), e->d_name); 487 488 if (pci_scan_one(dirname, &addr) < 0) 489 goto error; 490 } 491 closedir(dir); 492 return 0; 493 494 error: 495 closedir(dir); 496 return -1; 497 } 498 499 #if defined(RTE_ARCH_X86) 500 bool 501 pci_device_iommu_support_va(const struct rte_pci_device *dev) 502 { 503 #define VTD_CAP_MGAW_SHIFT 16 504 #define VTD_CAP_MGAW_MASK (0x3fULL << VTD_CAP_MGAW_SHIFT) 505 const struct rte_pci_addr *addr = &dev->addr; 506 char filename[PATH_MAX]; 507 FILE *fp; 508 uint64_t mgaw, vtd_cap_reg = 0; 509 510 snprintf(filename, sizeof(filename), 511 "%s/" PCI_PRI_FMT "/iommu/intel-iommu/cap", 512 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, 513 addr->function); 514 515 fp = fopen(filename, "r"); 516 if (fp == NULL) { 517 /* We don't have an Intel IOMMU, assume VA supported */ 518 if (errno == ENOENT) 519 return true; 520 521 RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n", 522 __func__, filename, strerror(errno)); 523 return false; 524 } 525 526 /* We have an Intel IOMMU */ 527 if (fscanf(fp, "%" PRIx64, &vtd_cap_reg) != 1) { 528 RTE_LOG(ERR, EAL, "%s(): can't read %s\n", __func__, filename); 529 fclose(fp); 530 return false; 531 } 532 533 fclose(fp); 534 535 mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1; 536 537 /* 538 * Assuming there is no limitation by now. We can not know at this point 539 * because the memory has not been initialized yet. Setting the dma mask 540 * will force a check once memory initialization is done. We can not do 541 * a fallback to IOVA PA now, but if the dma check fails, the error 542 * message should advice for using '--iova-mode pa' if IOVA VA is the 543 * current mode. 544 */ 545 rte_mem_set_dma_mask(mgaw); 546 return true; 547 } 548 #elif defined(RTE_ARCH_PPC_64) 549 bool 550 pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev) 551 { 552 return false; 553 } 554 #else 555 bool 556 pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev) 557 { 558 return true; 559 } 560 #endif 561 562 enum rte_iova_mode 563 pci_device_iova_mode(const struct rte_pci_driver *pdrv, 564 const struct rte_pci_device *pdev) 565 { 566 enum rte_iova_mode iova_mode = RTE_IOVA_DC; 567 568 switch (pdev->kdrv) { 569 case RTE_KDRV_VFIO: { 570 #ifdef VFIO_PRESENT 571 static int is_vfio_noiommu_enabled = -1; 572 573 if (is_vfio_noiommu_enabled == -1) { 574 if (rte_vfio_noiommu_is_enabled() == 1) 575 is_vfio_noiommu_enabled = 1; 576 else 577 is_vfio_noiommu_enabled = 0; 578 } 579 if (is_vfio_noiommu_enabled != 0) 580 iova_mode = RTE_IOVA_PA; 581 else if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0) 582 iova_mode = RTE_IOVA_VA; 583 #endif 584 break; 585 } 586 587 case RTE_KDRV_IGB_UIO: 588 case RTE_KDRV_UIO_GENERIC: 589 iova_mode = RTE_IOVA_PA; 590 break; 591 592 default: 593 if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0) 594 iova_mode = RTE_IOVA_VA; 595 break; 596 } 597 return iova_mode; 598 } 599 600 /* Read PCI config space. */ 601 int rte_pci_read_config(const struct rte_pci_device *device, 602 void *buf, size_t len, off_t offset) 603 { 604 char devname[RTE_DEV_NAME_MAX_LEN] = ""; 605 const struct rte_intr_handle *intr_handle = &device->intr_handle; 606 607 switch (device->kdrv) { 608 case RTE_KDRV_IGB_UIO: 609 case RTE_KDRV_UIO_GENERIC: 610 return pci_uio_read_config(intr_handle, buf, len, offset); 611 #ifdef VFIO_PRESENT 612 case RTE_KDRV_VFIO: 613 return pci_vfio_read_config(intr_handle, buf, len, offset); 614 #endif 615 default: 616 rte_pci_device_name(&device->addr, devname, 617 RTE_DEV_NAME_MAX_LEN); 618 RTE_LOG(ERR, EAL, 619 "Unknown driver type for %s\n", devname); 620 return -1; 621 } 622 } 623 624 /* Write PCI config space. */ 625 int rte_pci_write_config(const struct rte_pci_device *device, 626 const void *buf, size_t len, off_t offset) 627 { 628 char devname[RTE_DEV_NAME_MAX_LEN] = ""; 629 const struct rte_intr_handle *intr_handle = &device->intr_handle; 630 631 switch (device->kdrv) { 632 case RTE_KDRV_IGB_UIO: 633 case RTE_KDRV_UIO_GENERIC: 634 return pci_uio_write_config(intr_handle, buf, len, offset); 635 #ifdef VFIO_PRESENT 636 case RTE_KDRV_VFIO: 637 return pci_vfio_write_config(intr_handle, buf, len, offset); 638 #endif 639 default: 640 rte_pci_device_name(&device->addr, devname, 641 RTE_DEV_NAME_MAX_LEN); 642 RTE_LOG(ERR, EAL, 643 "Unknown driver type for %s\n", devname); 644 return -1; 645 } 646 } 647 648 #if defined(RTE_ARCH_X86) 649 static int 650 pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused, 651 struct rte_pci_ioport *p) 652 { 653 uint16_t start, end; 654 FILE *fp; 655 char *line = NULL; 656 char pci_id[16]; 657 int found = 0; 658 size_t linesz; 659 660 snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT, 661 dev->addr.domain, dev->addr.bus, 662 dev->addr.devid, dev->addr.function); 663 664 fp = fopen("/proc/ioports", "r"); 665 if (fp == NULL) { 666 RTE_LOG(ERR, EAL, "%s(): can't open ioports\n", __func__); 667 return -1; 668 } 669 670 while (getdelim(&line, &linesz, '\n', fp) > 0) { 671 char *ptr = line; 672 char *left; 673 int n; 674 675 n = strcspn(ptr, ":"); 676 ptr[n] = 0; 677 left = &ptr[n + 1]; 678 679 while (*left && isspace(*left)) 680 left++; 681 682 if (!strncmp(left, pci_id, strlen(pci_id))) { 683 found = 1; 684 685 while (*ptr && isspace(*ptr)) 686 ptr++; 687 688 sscanf(ptr, "%04hx-%04hx", &start, &end); 689 690 break; 691 } 692 } 693 694 free(line); 695 fclose(fp); 696 697 if (!found) 698 return -1; 699 700 p->base = start; 701 RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start); 702 703 return 0; 704 } 705 #endif 706 707 int 708 rte_pci_ioport_map(struct rte_pci_device *dev, int bar, 709 struct rte_pci_ioport *p) 710 { 711 int ret = -1; 712 713 switch (dev->kdrv) { 714 #ifdef VFIO_PRESENT 715 case RTE_KDRV_VFIO: 716 if (pci_vfio_is_enabled()) 717 ret = pci_vfio_ioport_map(dev, bar, p); 718 break; 719 #endif 720 case RTE_KDRV_IGB_UIO: 721 ret = pci_uio_ioport_map(dev, bar, p); 722 break; 723 case RTE_KDRV_UIO_GENERIC: 724 #if defined(RTE_ARCH_X86) 725 ret = pci_ioport_map(dev, bar, p); 726 #else 727 ret = pci_uio_ioport_map(dev, bar, p); 728 #endif 729 break; 730 case RTE_KDRV_NONE: 731 #if defined(RTE_ARCH_X86) 732 ret = pci_ioport_map(dev, bar, p); 733 #endif 734 break; 735 default: 736 break; 737 } 738 739 if (!ret) 740 p->dev = dev; 741 742 return ret; 743 } 744 745 void 746 rte_pci_ioport_read(struct rte_pci_ioport *p, 747 void *data, size_t len, off_t offset) 748 { 749 switch (p->dev->kdrv) { 750 #ifdef VFIO_PRESENT 751 case RTE_KDRV_VFIO: 752 pci_vfio_ioport_read(p, data, len, offset); 753 break; 754 #endif 755 case RTE_KDRV_IGB_UIO: 756 pci_uio_ioport_read(p, data, len, offset); 757 break; 758 case RTE_KDRV_UIO_GENERIC: 759 pci_uio_ioport_read(p, data, len, offset); 760 break; 761 case RTE_KDRV_NONE: 762 #if defined(RTE_ARCH_X86) 763 pci_uio_ioport_read(p, data, len, offset); 764 #endif 765 break; 766 default: 767 break; 768 } 769 } 770 771 void 772 rte_pci_ioport_write(struct rte_pci_ioport *p, 773 const void *data, size_t len, off_t offset) 774 { 775 switch (p->dev->kdrv) { 776 #ifdef VFIO_PRESENT 777 case RTE_KDRV_VFIO: 778 pci_vfio_ioport_write(p, data, len, offset); 779 break; 780 #endif 781 case RTE_KDRV_IGB_UIO: 782 pci_uio_ioport_write(p, data, len, offset); 783 break; 784 case RTE_KDRV_UIO_GENERIC: 785 pci_uio_ioport_write(p, data, len, offset); 786 break; 787 case RTE_KDRV_NONE: 788 #if defined(RTE_ARCH_X86) 789 pci_uio_ioport_write(p, data, len, offset); 790 #endif 791 break; 792 default: 793 break; 794 } 795 } 796 797 int 798 rte_pci_ioport_unmap(struct rte_pci_ioport *p) 799 { 800 int ret = -1; 801 802 switch (p->dev->kdrv) { 803 #ifdef VFIO_PRESENT 804 case RTE_KDRV_VFIO: 805 if (pci_vfio_is_enabled()) 806 ret = pci_vfio_ioport_unmap(p); 807 break; 808 #endif 809 case RTE_KDRV_IGB_UIO: 810 ret = pci_uio_ioport_unmap(p); 811 break; 812 case RTE_KDRV_UIO_GENERIC: 813 #if defined(RTE_ARCH_X86) 814 ret = 0; 815 #else 816 ret = pci_uio_ioport_unmap(p); 817 #endif 818 break; 819 case RTE_KDRV_NONE: 820 #if defined(RTE_ARCH_X86) 821 ret = 0; 822 #endif 823 break; 824 default: 825 break; 826 } 827 828 return ret; 829 } 830