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_eal_memconfig.h> 13 #include <rte_malloc.h> 14 #include <rte_devargs.h> 15 #include <rte_memcpy.h> 16 #include <rte_vfio.h> 17 18 #include "eal_filesystem.h" 19 20 #include "private.h" 21 #include "pci_init.h" 22 23 /** 24 * @file 25 * PCI probing under linux 26 * 27 * This code is used to simulate a PCI probe by parsing information in sysfs. 28 * When a registered device matches a driver, it is then initialized with 29 * IGB_UIO driver (or doesn't initialize, if the device wasn't bound to it). 30 */ 31 32 extern struct rte_pci_bus rte_pci_bus; 33 34 static int 35 pci_get_kernel_driver_by_path(const char *filename, char *dri_name, 36 size_t len) 37 { 38 int count; 39 char path[PATH_MAX]; 40 char *name; 41 42 if (!filename || !dri_name) 43 return -1; 44 45 count = readlink(filename, path, PATH_MAX); 46 if (count >= PATH_MAX) 47 return -1; 48 49 /* For device does not have a driver */ 50 if (count < 0) 51 return 1; 52 53 path[count] = '\0'; 54 55 name = strrchr(path, '/'); 56 if (name) { 57 strlcpy(dri_name, name + 1, len); 58 return 0; 59 } 60 61 return -1; 62 } 63 64 /* Map pci device */ 65 int 66 rte_pci_map_device(struct rte_pci_device *dev) 67 { 68 int ret = -1; 69 70 /* try mapping the NIC resources using VFIO if it exists */ 71 switch (dev->kdrv) { 72 case RTE_KDRV_VFIO: 73 #ifdef VFIO_PRESENT 74 if (pci_vfio_is_enabled()) 75 ret = pci_vfio_map_resource(dev); 76 #endif 77 break; 78 case RTE_KDRV_IGB_UIO: 79 case RTE_KDRV_UIO_GENERIC: 80 if (rte_eal_using_phys_addrs()) { 81 /* map resources for devices that use uio */ 82 ret = pci_uio_map_resource(dev); 83 } 84 break; 85 default: 86 RTE_LOG(DEBUG, EAL, 87 " Not managed by a supported kernel driver, skipped\n"); 88 ret = 1; 89 break; 90 } 91 92 return ret; 93 } 94 95 /* Unmap pci device */ 96 void 97 rte_pci_unmap_device(struct rte_pci_device *dev) 98 { 99 /* try unmapping the NIC resources using VFIO if it exists */ 100 switch (dev->kdrv) { 101 case RTE_KDRV_VFIO: 102 #ifdef VFIO_PRESENT 103 if (pci_vfio_is_enabled()) 104 pci_vfio_unmap_resource(dev); 105 #endif 106 break; 107 case RTE_KDRV_IGB_UIO: 108 case RTE_KDRV_UIO_GENERIC: 109 /* unmap resources for devices that use uio */ 110 pci_uio_unmap_resource(dev); 111 break; 112 default: 113 RTE_LOG(DEBUG, EAL, 114 " Not managed by a supported kernel driver, skipped\n"); 115 break; 116 } 117 } 118 119 static int 120 find_max_end_va(const struct rte_memseg_list *msl, void *arg) 121 { 122 size_t sz = msl->len; 123 void *end_va = RTE_PTR_ADD(msl->base_va, sz); 124 void **max_va = arg; 125 126 if (*max_va < end_va) 127 *max_va = end_va; 128 return 0; 129 } 130 131 void * 132 pci_find_max_end_va(void) 133 { 134 void *va = NULL; 135 136 rte_memseg_list_walk(find_max_end_va, &va); 137 return va; 138 } 139 140 141 /* parse one line of the "resource" sysfs file (note that the 'line' 142 * string is modified) 143 */ 144 int 145 pci_parse_one_sysfs_resource(char *line, size_t len, uint64_t *phys_addr, 146 uint64_t *end_addr, uint64_t *flags) 147 { 148 union pci_resource_info { 149 struct { 150 char *phys_addr; 151 char *end_addr; 152 char *flags; 153 }; 154 char *ptrs[PCI_RESOURCE_FMT_NVAL]; 155 } res_info; 156 157 if (rte_strsplit(line, len, res_info.ptrs, 3, ' ') != 3) { 158 RTE_LOG(ERR, EAL, 159 "%s(): bad resource format\n", __func__); 160 return -1; 161 } 162 errno = 0; 163 *phys_addr = strtoull(res_info.phys_addr, NULL, 16); 164 *end_addr = strtoull(res_info.end_addr, NULL, 16); 165 *flags = strtoull(res_info.flags, NULL, 16); 166 if (errno != 0) { 167 RTE_LOG(ERR, EAL, 168 "%s(): bad resource format\n", __func__); 169 return -1; 170 } 171 172 return 0; 173 } 174 175 /* parse the "resource" sysfs file */ 176 static int 177 pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev) 178 { 179 FILE *f; 180 char buf[BUFSIZ]; 181 int i; 182 uint64_t phys_addr, end_addr, flags; 183 184 f = fopen(filename, "r"); 185 if (f == NULL) { 186 RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n"); 187 return -1; 188 } 189 190 for (i = 0; i<PCI_MAX_RESOURCE; i++) { 191 192 if (fgets(buf, sizeof(buf), f) == NULL) { 193 RTE_LOG(ERR, EAL, 194 "%s(): cannot read resource\n", __func__); 195 goto error; 196 } 197 if (pci_parse_one_sysfs_resource(buf, sizeof(buf), &phys_addr, 198 &end_addr, &flags) < 0) 199 goto error; 200 201 if (flags & IORESOURCE_MEM) { 202 dev->mem_resource[i].phys_addr = phys_addr; 203 dev->mem_resource[i].len = end_addr - phys_addr + 1; 204 /* not mapped for now */ 205 dev->mem_resource[i].addr = NULL; 206 } 207 } 208 fclose(f); 209 return 0; 210 211 error: 212 fclose(f); 213 return -1; 214 } 215 216 /* Scan one pci sysfs entry, and fill the devices list from it. */ 217 static int 218 pci_scan_one(const char *dirname, const struct rte_pci_addr *addr) 219 { 220 char filename[PATH_MAX]; 221 unsigned long tmp; 222 struct rte_pci_device *dev; 223 char driver[PATH_MAX]; 224 int ret; 225 226 dev = malloc(sizeof(*dev)); 227 if (dev == NULL) 228 return -1; 229 230 memset(dev, 0, sizeof(*dev)); 231 dev->device.bus = &rte_pci_bus.bus; 232 dev->addr = *addr; 233 234 /* get vendor id */ 235 snprintf(filename, sizeof(filename), "%s/vendor", dirname); 236 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 237 free(dev); 238 return -1; 239 } 240 dev->id.vendor_id = (uint16_t)tmp; 241 242 /* get device id */ 243 snprintf(filename, sizeof(filename), "%s/device", dirname); 244 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 245 free(dev); 246 return -1; 247 } 248 dev->id.device_id = (uint16_t)tmp; 249 250 /* get subsystem_vendor id */ 251 snprintf(filename, sizeof(filename), "%s/subsystem_vendor", 252 dirname); 253 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 254 free(dev); 255 return -1; 256 } 257 dev->id.subsystem_vendor_id = (uint16_t)tmp; 258 259 /* get subsystem_device id */ 260 snprintf(filename, sizeof(filename), "%s/subsystem_device", 261 dirname); 262 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 263 free(dev); 264 return -1; 265 } 266 dev->id.subsystem_device_id = (uint16_t)tmp; 267 268 /* get class_id */ 269 snprintf(filename, sizeof(filename), "%s/class", 270 dirname); 271 if (eal_parse_sysfs_value(filename, &tmp) < 0) { 272 free(dev); 273 return -1; 274 } 275 /* the least 24 bits are valid: class, subclass, program interface */ 276 dev->id.class_id = (uint32_t)tmp & RTE_CLASS_ANY_ID; 277 278 /* get max_vfs */ 279 dev->max_vfs = 0; 280 snprintf(filename, sizeof(filename), "%s/max_vfs", dirname); 281 if (!access(filename, F_OK) && 282 eal_parse_sysfs_value(filename, &tmp) == 0) 283 dev->max_vfs = (uint16_t)tmp; 284 else { 285 /* for non igb_uio driver, need kernel version >= 3.8 */ 286 snprintf(filename, sizeof(filename), 287 "%s/sriov_numvfs", dirname); 288 if (!access(filename, F_OK) && 289 eal_parse_sysfs_value(filename, &tmp) == 0) 290 dev->max_vfs = (uint16_t)tmp; 291 } 292 293 /* get numa node, default to 0 if not present */ 294 snprintf(filename, sizeof(filename), "%s/numa_node", 295 dirname); 296 297 if (access(filename, F_OK) != -1) { 298 if (eal_parse_sysfs_value(filename, &tmp) == 0) 299 dev->device.numa_node = tmp; 300 else 301 dev->device.numa_node = -1; 302 } else { 303 dev->device.numa_node = 0; 304 } 305 306 pci_name_set(dev); 307 308 /* parse resources */ 309 snprintf(filename, sizeof(filename), "%s/resource", dirname); 310 if (pci_parse_sysfs_resource(filename, dev) < 0) { 311 RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__); 312 free(dev); 313 return -1; 314 } 315 316 /* parse driver */ 317 snprintf(filename, sizeof(filename), "%s/driver", dirname); 318 ret = pci_get_kernel_driver_by_path(filename, driver, sizeof(driver)); 319 if (ret < 0) { 320 RTE_LOG(ERR, EAL, "Fail to get kernel driver\n"); 321 free(dev); 322 return -1; 323 } 324 325 if (!ret) { 326 if (!strcmp(driver, "vfio-pci")) 327 dev->kdrv = RTE_KDRV_VFIO; 328 else if (!strcmp(driver, "igb_uio")) 329 dev->kdrv = RTE_KDRV_IGB_UIO; 330 else if (!strcmp(driver, "uio_pci_generic")) 331 dev->kdrv = RTE_KDRV_UIO_GENERIC; 332 else 333 dev->kdrv = RTE_KDRV_UNKNOWN; 334 } else 335 dev->kdrv = RTE_KDRV_NONE; 336 337 /* device is valid, add in list (sorted) */ 338 if (TAILQ_EMPTY(&rte_pci_bus.device_list)) { 339 rte_pci_add_device(dev); 340 } else { 341 struct rte_pci_device *dev2; 342 int ret; 343 344 TAILQ_FOREACH(dev2, &rte_pci_bus.device_list, next) { 345 ret = rte_pci_addr_cmp(&dev->addr, &dev2->addr); 346 if (ret > 0) 347 continue; 348 349 if (ret < 0) { 350 rte_pci_insert_device(dev2, dev); 351 } else { /* already registered */ 352 if (!rte_dev_is_probed(&dev2->device)) { 353 dev2->kdrv = dev->kdrv; 354 dev2->max_vfs = dev->max_vfs; 355 pci_name_set(dev2); 356 memmove(dev2->mem_resource, 357 dev->mem_resource, 358 sizeof(dev->mem_resource)); 359 } else { 360 /** 361 * If device is plugged and driver is 362 * probed already, (This happens when 363 * we call rte_dev_probe which will 364 * scan all device on the bus) we don't 365 * need to do anything here unless... 366 **/ 367 if (dev2->kdrv != dev->kdrv || 368 dev2->max_vfs != dev->max_vfs) 369 /* 370 * This should not happens. 371 * But it is still possible if 372 * we unbind a device from 373 * vfio or uio before hotplug 374 * remove and rebind it with 375 * a different configure. 376 * So we just print out the 377 * error as an alarm. 378 */ 379 RTE_LOG(ERR, EAL, "Unexpected device scan at %s!\n", 380 filename); 381 } 382 free(dev); 383 } 384 return 0; 385 } 386 387 rte_pci_add_device(dev); 388 } 389 390 return 0; 391 } 392 393 int 394 pci_update_device(const struct rte_pci_addr *addr) 395 { 396 char filename[PATH_MAX]; 397 398 snprintf(filename, sizeof(filename), "%s/" PCI_PRI_FMT, 399 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, 400 addr->function); 401 402 return pci_scan_one(filename, addr); 403 } 404 405 /* 406 * split up a pci address into its constituent parts. 407 */ 408 static int 409 parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr) 410 { 411 /* first split on ':' */ 412 union splitaddr { 413 struct { 414 char *domain; 415 char *bus; 416 char *devid; 417 char *function; 418 }; 419 char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */ 420 } splitaddr; 421 422 char *buf_copy = strndup(buf, bufsize); 423 if (buf_copy == NULL) 424 return -1; 425 426 if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':') 427 != PCI_FMT_NVAL - 1) 428 goto error; 429 /* final split is on '.' between devid and function */ 430 splitaddr.function = strchr(splitaddr.devid,'.'); 431 if (splitaddr.function == NULL) 432 goto error; 433 *splitaddr.function++ = '\0'; 434 435 /* now convert to int values */ 436 errno = 0; 437 addr->domain = strtoul(splitaddr.domain, NULL, 16); 438 addr->bus = strtoul(splitaddr.bus, NULL, 16); 439 addr->devid = strtoul(splitaddr.devid, NULL, 16); 440 addr->function = strtoul(splitaddr.function, NULL, 10); 441 if (errno != 0) 442 goto error; 443 444 free(buf_copy); /* free the copy made with strdup */ 445 return 0; 446 error: 447 free(buf_copy); 448 return -1; 449 } 450 451 /* 452 * Scan the content of the PCI bus, and the devices in the devices 453 * list 454 */ 455 int 456 rte_pci_scan(void) 457 { 458 struct dirent *e; 459 DIR *dir; 460 char dirname[PATH_MAX]; 461 struct rte_pci_addr addr; 462 463 /* for debug purposes, PCI can be disabled */ 464 if (!rte_eal_has_pci()) 465 return 0; 466 467 #ifdef VFIO_PRESENT 468 if (!pci_vfio_is_enabled()) 469 RTE_LOG(DEBUG, EAL, "VFIO PCI modules not loaded\n"); 470 #endif 471 472 dir = opendir(rte_pci_get_sysfs_path()); 473 if (dir == NULL) { 474 RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n", 475 __func__, strerror(errno)); 476 return -1; 477 } 478 479 while ((e = readdir(dir)) != NULL) { 480 if (e->d_name[0] == '.') 481 continue; 482 483 if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0) 484 continue; 485 486 snprintf(dirname, sizeof(dirname), "%s/%s", 487 rte_pci_get_sysfs_path(), e->d_name); 488 489 if (pci_scan_one(dirname, &addr) < 0) 490 goto error; 491 } 492 closedir(dir); 493 return 0; 494 495 error: 496 closedir(dir); 497 return -1; 498 } 499 500 #if defined(RTE_ARCH_X86) 501 static bool 502 pci_one_device_iommu_support_va(const struct rte_pci_device *dev) 503 { 504 #define VTD_CAP_MGAW_SHIFT 16 505 #define VTD_CAP_MGAW_MASK (0x3fULL << VTD_CAP_MGAW_SHIFT) 506 const struct rte_pci_addr *addr = &dev->addr; 507 char filename[PATH_MAX]; 508 FILE *fp; 509 uint64_t mgaw, vtd_cap_reg = 0; 510 511 snprintf(filename, sizeof(filename), 512 "%s/" PCI_PRI_FMT "/iommu/intel-iommu/cap", 513 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, 514 addr->function); 515 if (access(filename, F_OK) == -1) { 516 /* We don't have an Intel IOMMU, assume VA supported*/ 517 return true; 518 } 519 520 /* We have an intel IOMMU */ 521 fp = fopen(filename, "r"); 522 if (fp == NULL) { 523 RTE_LOG(ERR, EAL, "%s(): can't open %s\n", __func__, filename); 524 return false; 525 } 526 527 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 static bool 550 pci_one_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev) 551 { 552 return false; 553 } 554 #else 555 static bool 556 pci_one_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 static int iommu_no_va = -1; 568 569 switch (pdev->kdrv) { 570 case RTE_KDRV_VFIO: { 571 #ifdef VFIO_PRESENT 572 static int is_vfio_noiommu_enabled = -1; 573 574 if (is_vfio_noiommu_enabled == -1) { 575 if (rte_vfio_noiommu_is_enabled() == 1) 576 is_vfio_noiommu_enabled = 1; 577 else 578 is_vfio_noiommu_enabled = 0; 579 } 580 if (is_vfio_noiommu_enabled != 0) 581 iova_mode = RTE_IOVA_PA; 582 else if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0) 583 iova_mode = RTE_IOVA_VA; 584 #endif 585 break; 586 } 587 588 case RTE_KDRV_IGB_UIO: 589 case RTE_KDRV_UIO_GENERIC: 590 iova_mode = RTE_IOVA_PA; 591 break; 592 593 default: 594 if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0) 595 iova_mode = RTE_IOVA_VA; 596 break; 597 } 598 599 if (iova_mode != RTE_IOVA_PA) { 600 /* 601 * We can check this only once, because the IOMMU hardware is 602 * the same for all of them. 603 */ 604 if (iommu_no_va == -1) 605 iommu_no_va = pci_one_device_iommu_support_va(pdev) 606 ? 0 : 1; 607 if (iommu_no_va != 0) 608 iova_mode = RTE_IOVA_PA; 609 } 610 return iova_mode; 611 } 612 613 /* Read PCI config space. */ 614 int rte_pci_read_config(const struct rte_pci_device *device, 615 void *buf, size_t len, off_t offset) 616 { 617 char devname[RTE_DEV_NAME_MAX_LEN] = ""; 618 const struct rte_intr_handle *intr_handle = &device->intr_handle; 619 620 switch (device->kdrv) { 621 case RTE_KDRV_IGB_UIO: 622 case RTE_KDRV_UIO_GENERIC: 623 return pci_uio_read_config(intr_handle, buf, len, offset); 624 #ifdef VFIO_PRESENT 625 case RTE_KDRV_VFIO: 626 return pci_vfio_read_config(intr_handle, buf, len, offset); 627 #endif 628 default: 629 rte_pci_device_name(&device->addr, devname, 630 RTE_DEV_NAME_MAX_LEN); 631 RTE_LOG(ERR, EAL, 632 "Unknown driver type for %s\n", devname); 633 return -1; 634 } 635 } 636 637 /* Write PCI config space. */ 638 int rte_pci_write_config(const struct rte_pci_device *device, 639 const void *buf, size_t len, off_t offset) 640 { 641 char devname[RTE_DEV_NAME_MAX_LEN] = ""; 642 const struct rte_intr_handle *intr_handle = &device->intr_handle; 643 644 switch (device->kdrv) { 645 case RTE_KDRV_IGB_UIO: 646 case RTE_KDRV_UIO_GENERIC: 647 return pci_uio_write_config(intr_handle, buf, len, offset); 648 #ifdef VFIO_PRESENT 649 case RTE_KDRV_VFIO: 650 return pci_vfio_write_config(intr_handle, buf, len, offset); 651 #endif 652 default: 653 rte_pci_device_name(&device->addr, devname, 654 RTE_DEV_NAME_MAX_LEN); 655 RTE_LOG(ERR, EAL, 656 "Unknown driver type for %s\n", devname); 657 return -1; 658 } 659 } 660 661 #if defined(RTE_ARCH_X86) 662 static int 663 pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused, 664 struct rte_pci_ioport *p) 665 { 666 uint16_t start, end; 667 FILE *fp; 668 char *line = NULL; 669 char pci_id[16]; 670 int found = 0; 671 size_t linesz; 672 673 snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT, 674 dev->addr.domain, dev->addr.bus, 675 dev->addr.devid, dev->addr.function); 676 677 fp = fopen("/proc/ioports", "r"); 678 if (fp == NULL) { 679 RTE_LOG(ERR, EAL, "%s(): can't open ioports\n", __func__); 680 return -1; 681 } 682 683 while (getdelim(&line, &linesz, '\n', fp) > 0) { 684 char *ptr = line; 685 char *left; 686 int n; 687 688 n = strcspn(ptr, ":"); 689 ptr[n] = 0; 690 left = &ptr[n + 1]; 691 692 while (*left && isspace(*left)) 693 left++; 694 695 if (!strncmp(left, pci_id, strlen(pci_id))) { 696 found = 1; 697 698 while (*ptr && isspace(*ptr)) 699 ptr++; 700 701 sscanf(ptr, "%04hx-%04hx", &start, &end); 702 703 break; 704 } 705 } 706 707 free(line); 708 fclose(fp); 709 710 if (!found) 711 return -1; 712 713 p->base = start; 714 RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start); 715 716 return 0; 717 } 718 #endif 719 720 int 721 rte_pci_ioport_map(struct rte_pci_device *dev, int bar, 722 struct rte_pci_ioport *p) 723 { 724 int ret = -1; 725 726 switch (dev->kdrv) { 727 #ifdef VFIO_PRESENT 728 case RTE_KDRV_VFIO: 729 if (pci_vfio_is_enabled()) 730 ret = pci_vfio_ioport_map(dev, bar, p); 731 break; 732 #endif 733 case RTE_KDRV_IGB_UIO: 734 ret = pci_uio_ioport_map(dev, bar, p); 735 break; 736 case RTE_KDRV_UIO_GENERIC: 737 #if defined(RTE_ARCH_X86) 738 ret = pci_ioport_map(dev, bar, p); 739 #else 740 ret = pci_uio_ioport_map(dev, bar, p); 741 #endif 742 break; 743 case RTE_KDRV_NONE: 744 #if defined(RTE_ARCH_X86) 745 ret = pci_ioport_map(dev, bar, p); 746 #endif 747 break; 748 default: 749 break; 750 } 751 752 if (!ret) 753 p->dev = dev; 754 755 return ret; 756 } 757 758 void 759 rte_pci_ioport_read(struct rte_pci_ioport *p, 760 void *data, size_t len, off_t offset) 761 { 762 switch (p->dev->kdrv) { 763 #ifdef VFIO_PRESENT 764 case RTE_KDRV_VFIO: 765 pci_vfio_ioport_read(p, data, len, offset); 766 break; 767 #endif 768 case RTE_KDRV_IGB_UIO: 769 pci_uio_ioport_read(p, data, len, offset); 770 break; 771 case RTE_KDRV_UIO_GENERIC: 772 pci_uio_ioport_read(p, data, len, offset); 773 break; 774 case RTE_KDRV_NONE: 775 #if defined(RTE_ARCH_X86) 776 pci_uio_ioport_read(p, data, len, offset); 777 #endif 778 break; 779 default: 780 break; 781 } 782 } 783 784 void 785 rte_pci_ioport_write(struct rte_pci_ioport *p, 786 const void *data, size_t len, off_t offset) 787 { 788 switch (p->dev->kdrv) { 789 #ifdef VFIO_PRESENT 790 case RTE_KDRV_VFIO: 791 pci_vfio_ioport_write(p, data, len, offset); 792 break; 793 #endif 794 case RTE_KDRV_IGB_UIO: 795 pci_uio_ioport_write(p, data, len, offset); 796 break; 797 case RTE_KDRV_UIO_GENERIC: 798 pci_uio_ioport_write(p, data, len, offset); 799 break; 800 case RTE_KDRV_NONE: 801 #if defined(RTE_ARCH_X86) 802 pci_uio_ioport_write(p, data, len, offset); 803 #endif 804 break; 805 default: 806 break; 807 } 808 } 809 810 int 811 rte_pci_ioport_unmap(struct rte_pci_ioport *p) 812 { 813 int ret = -1; 814 815 switch (p->dev->kdrv) { 816 #ifdef VFIO_PRESENT 817 case RTE_KDRV_VFIO: 818 if (pci_vfio_is_enabled()) 819 ret = pci_vfio_ioport_unmap(p); 820 break; 821 #endif 822 case RTE_KDRV_IGB_UIO: 823 ret = pci_uio_ioport_unmap(p); 824 break; 825 case RTE_KDRV_UIO_GENERIC: 826 #if defined(RTE_ARCH_X86) 827 ret = 0; 828 #else 829 ret = pci_uio_ioport_unmap(p); 830 #endif 831 break; 832 case RTE_KDRV_NONE: 833 #if defined(RTE_ARCH_X86) 834 ret = 0; 835 #endif 836 break; 837 default: 838 break; 839 } 840 841 return ret; 842 } 843