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_PCI_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_PCI_KDRV_IGB_UIO: 78 case RTE_PCI_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_PCI_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_PCI_KDRV_IGB_UIO: 107 case RTE_PCI_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_PCI_KDRV_VFIO; 327 else if (!strcmp(driver, "igb_uio")) 328 dev->kdrv = RTE_PCI_KDRV_IGB_UIO; 329 else if (!strcmp(driver, "uio_pci_generic")) 330 dev->kdrv = RTE_PCI_KDRV_UIO_GENERIC; 331 else 332 dev->kdrv = RTE_PCI_KDRV_UNKNOWN; 333 } else { 334 dev->kdrv = RTE_PCI_KDRV_NONE; 335 return 0; 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 dev2->id = dev->id; 356 pci_name_set(dev2); 357 memmove(dev2->mem_resource, 358 dev->mem_resource, 359 sizeof(dev->mem_resource)); 360 } else { 361 /** 362 * If device is plugged and driver is 363 * probed already, (This happens when 364 * we call rte_dev_probe which will 365 * scan all device on the bus) we don't 366 * need to do anything here unless... 367 **/ 368 if (dev2->kdrv != dev->kdrv || 369 dev2->max_vfs != dev->max_vfs || 370 memcmp(&dev2->id, &dev->id, sizeof(dev2->id))) 371 /* 372 * This should not happens. 373 * But it is still possible if 374 * we unbind a device from 375 * vfio or uio before hotplug 376 * remove and rebind it with 377 * a different configure. 378 * So we just print out the 379 * error as an alarm. 380 */ 381 RTE_LOG(ERR, EAL, "Unexpected device scan at %s!\n", 382 filename); 383 else if (dev2->device.devargs != 384 dev->device.devargs) { 385 rte_devargs_remove(dev2->device.devargs); 386 pci_name_set(dev2); 387 } 388 } 389 free(dev); 390 } 391 return 0; 392 } 393 394 rte_pci_add_device(dev); 395 } 396 397 return 0; 398 } 399 400 /* 401 * split up a pci address into its constituent parts. 402 */ 403 static int 404 parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr) 405 { 406 /* first split on ':' */ 407 union splitaddr { 408 struct { 409 char *domain; 410 char *bus; 411 char *devid; 412 char *function; 413 }; 414 char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */ 415 } splitaddr; 416 417 char *buf_copy = strndup(buf, bufsize); 418 if (buf_copy == NULL) 419 return -1; 420 421 if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':') 422 != PCI_FMT_NVAL - 1) 423 goto error; 424 /* final split is on '.' between devid and function */ 425 splitaddr.function = strchr(splitaddr.devid,'.'); 426 if (splitaddr.function == NULL) 427 goto error; 428 *splitaddr.function++ = '\0'; 429 430 /* now convert to int values */ 431 errno = 0; 432 addr->domain = strtoul(splitaddr.domain, NULL, 16); 433 addr->bus = strtoul(splitaddr.bus, NULL, 16); 434 addr->devid = strtoul(splitaddr.devid, NULL, 16); 435 addr->function = strtoul(splitaddr.function, NULL, 10); 436 if (errno != 0) 437 goto error; 438 439 free(buf_copy); /* free the copy made with strdup */ 440 return 0; 441 error: 442 free(buf_copy); 443 return -1; 444 } 445 446 /* 447 * Scan the content of the PCI bus, and the devices in the devices 448 * list 449 */ 450 int 451 rte_pci_scan(void) 452 { 453 struct dirent *e; 454 DIR *dir; 455 char dirname[PATH_MAX]; 456 struct rte_pci_addr addr; 457 458 /* for debug purposes, PCI can be disabled */ 459 if (!rte_eal_has_pci()) 460 return 0; 461 462 #ifdef VFIO_PRESENT 463 if (!pci_vfio_is_enabled()) 464 RTE_LOG(DEBUG, EAL, "VFIO PCI modules not loaded\n"); 465 #endif 466 467 dir = opendir(rte_pci_get_sysfs_path()); 468 if (dir == NULL) { 469 RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n", 470 __func__, strerror(errno)); 471 return -1; 472 } 473 474 while ((e = readdir(dir)) != NULL) { 475 if (e->d_name[0] == '.') 476 continue; 477 478 if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0) 479 continue; 480 481 if (rte_pci_ignore_device(&addr)) 482 continue; 483 484 snprintf(dirname, sizeof(dirname), "%s/%s", 485 rte_pci_get_sysfs_path(), e->d_name); 486 487 if (pci_scan_one(dirname, &addr) < 0) 488 goto error; 489 } 490 closedir(dir); 491 return 0; 492 493 error: 494 closedir(dir); 495 return -1; 496 } 497 498 #if defined(RTE_ARCH_X86) 499 bool 500 pci_device_iommu_support_va(const struct rte_pci_device *dev) 501 { 502 #define VTD_CAP_MGAW_SHIFT 16 503 #define VTD_CAP_MGAW_MASK (0x3fULL << VTD_CAP_MGAW_SHIFT) 504 const struct rte_pci_addr *addr = &dev->addr; 505 char filename[PATH_MAX]; 506 FILE *fp; 507 uint64_t mgaw, vtd_cap_reg = 0; 508 509 snprintf(filename, sizeof(filename), 510 "%s/" PCI_PRI_FMT "/iommu/intel-iommu/cap", 511 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, 512 addr->function); 513 514 fp = fopen(filename, "r"); 515 if (fp == NULL) { 516 /* We don't have an Intel IOMMU, assume VA supported */ 517 if (errno == ENOENT) 518 return true; 519 520 RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n", 521 __func__, filename, strerror(errno)); 522 return false; 523 } 524 525 /* We have an Intel IOMMU */ 526 if (fscanf(fp, "%" PRIx64, &vtd_cap_reg) != 1) { 527 RTE_LOG(ERR, EAL, "%s(): can't read %s\n", __func__, filename); 528 fclose(fp); 529 return false; 530 } 531 532 fclose(fp); 533 534 mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1; 535 536 /* 537 * Assuming there is no limitation by now. We can not know at this point 538 * because the memory has not been initialized yet. Setting the dma mask 539 * will force a check once memory initialization is done. We can not do 540 * a fallback to IOVA PA now, but if the dma check fails, the error 541 * message should advice for using '--iova-mode pa' if IOVA VA is the 542 * current mode. 543 */ 544 rte_mem_set_dma_mask(mgaw); 545 return true; 546 } 547 #elif defined(RTE_ARCH_PPC_64) 548 bool 549 pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev) 550 { 551 /* 552 * IOMMU is always present on a PowerNV host (IOMMUv2). 553 * IOMMU is also present in a KVM/QEMU VM (IOMMUv1) but is not 554 * currently supported by DPDK. Test for our current environment 555 * and report VA support as appropriate. 556 */ 557 558 char *line = NULL; 559 size_t len = 0; 560 char filename[PATH_MAX] = "/proc/cpuinfo"; 561 FILE *fp = fopen(filename, "r"); 562 bool ret = false; 563 564 if (fp == NULL) { 565 RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n", 566 __func__, filename, strerror(errno)); 567 return ret; 568 } 569 570 /* Check for a PowerNV platform */ 571 while (getline(&line, &len, fp) != -1) { 572 if (strstr(line, "platform") != NULL) 573 continue; 574 575 if (strstr(line, "PowerNV") != NULL) { 576 RTE_LOG(DEBUG, EAL, "Running on a PowerNV system\n"); 577 ret = true; 578 break; 579 } 580 } 581 582 free(line); 583 fclose(fp); 584 return ret; 585 } 586 #else 587 bool 588 pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev) 589 { 590 return true; 591 } 592 #endif 593 594 enum rte_iova_mode 595 pci_device_iova_mode(const struct rte_pci_driver *pdrv, 596 const struct rte_pci_device *pdev) 597 { 598 enum rte_iova_mode iova_mode = RTE_IOVA_DC; 599 600 switch (pdev->kdrv) { 601 case RTE_PCI_KDRV_VFIO: { 602 #ifdef VFIO_PRESENT 603 static int is_vfio_noiommu_enabled = -1; 604 605 if (is_vfio_noiommu_enabled == -1) { 606 if (rte_vfio_noiommu_is_enabled() == 1) 607 is_vfio_noiommu_enabled = 1; 608 else 609 is_vfio_noiommu_enabled = 0; 610 } 611 if (is_vfio_noiommu_enabled != 0) 612 iova_mode = RTE_IOVA_PA; 613 else if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0) 614 iova_mode = RTE_IOVA_VA; 615 #endif 616 break; 617 } 618 619 case RTE_PCI_KDRV_IGB_UIO: 620 case RTE_PCI_KDRV_UIO_GENERIC: 621 iova_mode = RTE_IOVA_PA; 622 break; 623 624 default: 625 if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0) 626 iova_mode = RTE_IOVA_VA; 627 break; 628 } 629 return iova_mode; 630 } 631 632 /* Read PCI config space. */ 633 int rte_pci_read_config(const struct rte_pci_device *device, 634 void *buf, size_t len, off_t offset) 635 { 636 char devname[RTE_DEV_NAME_MAX_LEN] = ""; 637 const struct rte_intr_handle *intr_handle = &device->intr_handle; 638 639 switch (device->kdrv) { 640 case RTE_PCI_KDRV_IGB_UIO: 641 case RTE_PCI_KDRV_UIO_GENERIC: 642 return pci_uio_read_config(intr_handle, buf, len, offset); 643 #ifdef VFIO_PRESENT 644 case RTE_PCI_KDRV_VFIO: 645 return pci_vfio_read_config(intr_handle, buf, len, offset); 646 #endif 647 default: 648 rte_pci_device_name(&device->addr, devname, 649 RTE_DEV_NAME_MAX_LEN); 650 RTE_LOG(ERR, EAL, 651 "Unknown driver type for %s\n", devname); 652 return -1; 653 } 654 } 655 656 /* Write PCI config space. */ 657 int rte_pci_write_config(const struct rte_pci_device *device, 658 const void *buf, size_t len, off_t offset) 659 { 660 char devname[RTE_DEV_NAME_MAX_LEN] = ""; 661 const struct rte_intr_handle *intr_handle = &device->intr_handle; 662 663 switch (device->kdrv) { 664 case RTE_PCI_KDRV_IGB_UIO: 665 case RTE_PCI_KDRV_UIO_GENERIC: 666 return pci_uio_write_config(intr_handle, buf, len, offset); 667 #ifdef VFIO_PRESENT 668 case RTE_PCI_KDRV_VFIO: 669 return pci_vfio_write_config(intr_handle, buf, len, offset); 670 #endif 671 default: 672 rte_pci_device_name(&device->addr, devname, 673 RTE_DEV_NAME_MAX_LEN); 674 RTE_LOG(ERR, EAL, 675 "Unknown driver type for %s\n", devname); 676 return -1; 677 } 678 } 679 680 #if defined(RTE_ARCH_X86) 681 static int 682 pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused, 683 struct rte_pci_ioport *p) 684 { 685 uint16_t start, end; 686 FILE *fp; 687 char *line = NULL; 688 char pci_id[16]; 689 int found = 0; 690 size_t linesz; 691 692 if (rte_eal_iopl_init() != 0) { 693 RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for PCI device %s\n", 694 __func__, dev->name); 695 return -1; 696 } 697 698 snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT, 699 dev->addr.domain, dev->addr.bus, 700 dev->addr.devid, dev->addr.function); 701 702 fp = fopen("/proc/ioports", "r"); 703 if (fp == NULL) { 704 RTE_LOG(ERR, EAL, "%s(): can't open ioports\n", __func__); 705 return -1; 706 } 707 708 while (getdelim(&line, &linesz, '\n', fp) > 0) { 709 char *ptr = line; 710 char *left; 711 int n; 712 713 n = strcspn(ptr, ":"); 714 ptr[n] = 0; 715 left = &ptr[n + 1]; 716 717 while (*left && isspace(*left)) 718 left++; 719 720 if (!strncmp(left, pci_id, strlen(pci_id))) { 721 found = 1; 722 723 while (*ptr && isspace(*ptr)) 724 ptr++; 725 726 sscanf(ptr, "%04hx-%04hx", &start, &end); 727 728 break; 729 } 730 } 731 732 free(line); 733 fclose(fp); 734 735 if (!found) 736 return -1; 737 738 p->base = start; 739 RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start); 740 741 return 0; 742 } 743 #endif 744 745 int 746 rte_pci_ioport_map(struct rte_pci_device *dev, int bar, 747 struct rte_pci_ioport *p) 748 { 749 int ret = -1; 750 751 switch (dev->kdrv) { 752 #ifdef VFIO_PRESENT 753 case RTE_PCI_KDRV_VFIO: 754 if (pci_vfio_is_enabled()) 755 ret = pci_vfio_ioport_map(dev, bar, p); 756 break; 757 #endif 758 case RTE_PCI_KDRV_IGB_UIO: 759 ret = pci_uio_ioport_map(dev, bar, p); 760 break; 761 case RTE_PCI_KDRV_UIO_GENERIC: 762 #if defined(RTE_ARCH_X86) 763 ret = pci_ioport_map(dev, bar, p); 764 #else 765 ret = pci_uio_ioport_map(dev, bar, p); 766 #endif 767 break; 768 default: 769 break; 770 } 771 772 if (!ret) 773 p->dev = dev; 774 775 return ret; 776 } 777 778 void 779 rte_pci_ioport_read(struct rte_pci_ioport *p, 780 void *data, size_t len, off_t offset) 781 { 782 switch (p->dev->kdrv) { 783 #ifdef VFIO_PRESENT 784 case RTE_PCI_KDRV_VFIO: 785 pci_vfio_ioport_read(p, data, len, offset); 786 break; 787 #endif 788 case RTE_PCI_KDRV_IGB_UIO: 789 pci_uio_ioport_read(p, data, len, offset); 790 break; 791 case RTE_PCI_KDRV_UIO_GENERIC: 792 pci_uio_ioport_read(p, data, len, offset); 793 break; 794 default: 795 break; 796 } 797 } 798 799 void 800 rte_pci_ioport_write(struct rte_pci_ioport *p, 801 const void *data, size_t len, off_t offset) 802 { 803 switch (p->dev->kdrv) { 804 #ifdef VFIO_PRESENT 805 case RTE_PCI_KDRV_VFIO: 806 pci_vfio_ioport_write(p, data, len, offset); 807 break; 808 #endif 809 case RTE_PCI_KDRV_IGB_UIO: 810 pci_uio_ioport_write(p, data, len, offset); 811 break; 812 case RTE_PCI_KDRV_UIO_GENERIC: 813 pci_uio_ioport_write(p, data, len, offset); 814 break; 815 default: 816 break; 817 } 818 } 819 820 int 821 rte_pci_ioport_unmap(struct rte_pci_ioport *p) 822 { 823 int ret = -1; 824 825 switch (p->dev->kdrv) { 826 #ifdef VFIO_PRESENT 827 case RTE_PCI_KDRV_VFIO: 828 if (pci_vfio_is_enabled()) 829 ret = pci_vfio_ioport_unmap(p); 830 break; 831 #endif 832 case RTE_PCI_KDRV_IGB_UIO: 833 ret = pci_uio_ioport_unmap(p); 834 break; 835 case RTE_PCI_KDRV_UIO_GENERIC: 836 #if defined(RTE_ARCH_X86) 837 ret = 0; 838 #else 839 ret = pci_uio_ioport_unmap(p); 840 #endif 841 break; 842 default: 843 break; 844 } 845 846 return ret; 847 } 848