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 else if (dev2->device.devargs != 381 dev->device.devargs) { 382 rte_devargs_remove(dev2->device.devargs); 383 pci_name_set(dev2); 384 } 385 } 386 free(dev); 387 } 388 return 0; 389 } 390 391 rte_pci_add_device(dev); 392 } 393 394 return 0; 395 } 396 397 int 398 pci_update_device(const struct rte_pci_addr *addr) 399 { 400 char filename[PATH_MAX]; 401 402 snprintf(filename, sizeof(filename), "%s/" PCI_PRI_FMT, 403 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, 404 addr->function); 405 406 return pci_scan_one(filename, addr); 407 } 408 409 /* 410 * split up a pci address into its constituent parts. 411 */ 412 static int 413 parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr) 414 { 415 /* first split on ':' */ 416 union splitaddr { 417 struct { 418 char *domain; 419 char *bus; 420 char *devid; 421 char *function; 422 }; 423 char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */ 424 } splitaddr; 425 426 char *buf_copy = strndup(buf, bufsize); 427 if (buf_copy == NULL) 428 return -1; 429 430 if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':') 431 != PCI_FMT_NVAL - 1) 432 goto error; 433 /* final split is on '.' between devid and function */ 434 splitaddr.function = strchr(splitaddr.devid,'.'); 435 if (splitaddr.function == NULL) 436 goto error; 437 *splitaddr.function++ = '\0'; 438 439 /* now convert to int values */ 440 errno = 0; 441 addr->domain = strtoul(splitaddr.domain, NULL, 16); 442 addr->bus = strtoul(splitaddr.bus, NULL, 16); 443 addr->devid = strtoul(splitaddr.devid, NULL, 16); 444 addr->function = strtoul(splitaddr.function, NULL, 10); 445 if (errno != 0) 446 goto error; 447 448 free(buf_copy); /* free the copy made with strdup */ 449 return 0; 450 error: 451 free(buf_copy); 452 return -1; 453 } 454 455 /* 456 * Scan the content of the PCI bus, and the devices in the devices 457 * list 458 */ 459 int 460 rte_pci_scan(void) 461 { 462 struct dirent *e; 463 DIR *dir; 464 char dirname[PATH_MAX]; 465 struct rte_pci_addr addr; 466 467 /* for debug purposes, PCI can be disabled */ 468 if (!rte_eal_has_pci()) 469 return 0; 470 471 #ifdef VFIO_PRESENT 472 if (!pci_vfio_is_enabled()) 473 RTE_LOG(DEBUG, EAL, "VFIO PCI modules not loaded\n"); 474 #endif 475 476 dir = opendir(rte_pci_get_sysfs_path()); 477 if (dir == NULL) { 478 RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n", 479 __func__, strerror(errno)); 480 return -1; 481 } 482 483 while ((e = readdir(dir)) != NULL) { 484 if (e->d_name[0] == '.') 485 continue; 486 487 if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0) 488 continue; 489 490 snprintf(dirname, sizeof(dirname), "%s/%s", 491 rte_pci_get_sysfs_path(), e->d_name); 492 493 if (pci_scan_one(dirname, &addr) < 0) 494 goto error; 495 } 496 closedir(dir); 497 return 0; 498 499 error: 500 closedir(dir); 501 return -1; 502 } 503 504 #if defined(RTE_ARCH_X86) 505 bool 506 pci_device_iommu_support_va(const struct rte_pci_device *dev) 507 { 508 #define VTD_CAP_MGAW_SHIFT 16 509 #define VTD_CAP_MGAW_MASK (0x3fULL << VTD_CAP_MGAW_SHIFT) 510 const struct rte_pci_addr *addr = &dev->addr; 511 char filename[PATH_MAX]; 512 FILE *fp; 513 uint64_t mgaw, vtd_cap_reg = 0; 514 515 snprintf(filename, sizeof(filename), 516 "%s/" PCI_PRI_FMT "/iommu/intel-iommu/cap", 517 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, 518 addr->function); 519 520 fp = fopen(filename, "r"); 521 if (fp == NULL) { 522 /* We don't have an Intel IOMMU, assume VA supported */ 523 if (errno == ENOENT) 524 return true; 525 526 RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n", 527 __func__, filename, strerror(errno)); 528 return false; 529 } 530 531 /* We have an Intel IOMMU */ 532 if (fscanf(fp, "%" PRIx64, &vtd_cap_reg) != 1) { 533 RTE_LOG(ERR, EAL, "%s(): can't read %s\n", __func__, filename); 534 fclose(fp); 535 return false; 536 } 537 538 fclose(fp); 539 540 mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1; 541 542 /* 543 * Assuming there is no limitation by now. We can not know at this point 544 * because the memory has not been initialized yet. Setting the dma mask 545 * will force a check once memory initialization is done. We can not do 546 * a fallback to IOVA PA now, but if the dma check fails, the error 547 * message should advice for using '--iova-mode pa' if IOVA VA is the 548 * current mode. 549 */ 550 rte_mem_set_dma_mask(mgaw); 551 return true; 552 } 553 #elif defined(RTE_ARCH_PPC_64) 554 bool 555 pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev) 556 { 557 /* 558 * IOMMU is always present on a PowerNV host (IOMMUv2). 559 * IOMMU is also present in a KVM/QEMU VM (IOMMUv1) but is not 560 * currently supported by DPDK. Test for our current environment 561 * and report VA support as appropriate. 562 */ 563 564 char *line = NULL; 565 size_t len = 0; 566 char filename[PATH_MAX] = "/proc/cpuinfo"; 567 FILE *fp = fopen(filename, "r"); 568 bool ret = false; 569 570 if (fp == NULL) { 571 RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n", 572 __func__, filename, strerror(errno)); 573 return ret; 574 } 575 576 /* Check for a PowerNV platform */ 577 while (getline(&line, &len, fp) != -1) { 578 if (strstr(line, "platform") != NULL) 579 continue; 580 581 if (strstr(line, "PowerNV") != NULL) { 582 RTE_LOG(DEBUG, EAL, "Running on a PowerNV system\n"); 583 ret = true; 584 break; 585 } 586 } 587 588 free(line); 589 fclose(fp); 590 return ret; 591 } 592 #else 593 bool 594 pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev) 595 { 596 return true; 597 } 598 #endif 599 600 enum rte_iova_mode 601 pci_device_iova_mode(const struct rte_pci_driver *pdrv, 602 const struct rte_pci_device *pdev) 603 { 604 enum rte_iova_mode iova_mode = RTE_IOVA_DC; 605 606 switch (pdev->kdrv) { 607 case RTE_KDRV_VFIO: { 608 #ifdef VFIO_PRESENT 609 static int is_vfio_noiommu_enabled = -1; 610 611 if (is_vfio_noiommu_enabled == -1) { 612 if (rte_vfio_noiommu_is_enabled() == 1) 613 is_vfio_noiommu_enabled = 1; 614 else 615 is_vfio_noiommu_enabled = 0; 616 } 617 if (is_vfio_noiommu_enabled != 0) 618 iova_mode = RTE_IOVA_PA; 619 else if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0) 620 iova_mode = RTE_IOVA_VA; 621 #endif 622 break; 623 } 624 625 case RTE_KDRV_IGB_UIO: 626 case RTE_KDRV_UIO_GENERIC: 627 iova_mode = RTE_IOVA_PA; 628 break; 629 630 default: 631 if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0) 632 iova_mode = RTE_IOVA_VA; 633 break; 634 } 635 return iova_mode; 636 } 637 638 /* Read PCI config space. */ 639 int rte_pci_read_config(const struct rte_pci_device *device, 640 void *buf, size_t len, off_t offset) 641 { 642 char devname[RTE_DEV_NAME_MAX_LEN] = ""; 643 const struct rte_intr_handle *intr_handle = &device->intr_handle; 644 645 switch (device->kdrv) { 646 case RTE_KDRV_IGB_UIO: 647 case RTE_KDRV_UIO_GENERIC: 648 return pci_uio_read_config(intr_handle, buf, len, offset); 649 #ifdef VFIO_PRESENT 650 case RTE_KDRV_VFIO: 651 return pci_vfio_read_config(intr_handle, buf, len, offset); 652 #endif 653 default: 654 rte_pci_device_name(&device->addr, devname, 655 RTE_DEV_NAME_MAX_LEN); 656 RTE_LOG(ERR, EAL, 657 "Unknown driver type for %s\n", devname); 658 return -1; 659 } 660 } 661 662 /* Write PCI config space. */ 663 int rte_pci_write_config(const struct rte_pci_device *device, 664 const void *buf, size_t len, off_t offset) 665 { 666 char devname[RTE_DEV_NAME_MAX_LEN] = ""; 667 const struct rte_intr_handle *intr_handle = &device->intr_handle; 668 669 switch (device->kdrv) { 670 case RTE_KDRV_IGB_UIO: 671 case RTE_KDRV_UIO_GENERIC: 672 return pci_uio_write_config(intr_handle, buf, len, offset); 673 #ifdef VFIO_PRESENT 674 case RTE_KDRV_VFIO: 675 return pci_vfio_write_config(intr_handle, buf, len, offset); 676 #endif 677 default: 678 rte_pci_device_name(&device->addr, devname, 679 RTE_DEV_NAME_MAX_LEN); 680 RTE_LOG(ERR, EAL, 681 "Unknown driver type for %s\n", devname); 682 return -1; 683 } 684 } 685 686 #if defined(RTE_ARCH_X86) 687 static int 688 pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused, 689 struct rte_pci_ioport *p) 690 { 691 uint16_t start, end; 692 FILE *fp; 693 char *line = NULL; 694 char pci_id[16]; 695 int found = 0; 696 size_t linesz; 697 698 if (rte_eal_iopl_init() != 0) { 699 RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for PCI device %s\n", 700 __func__, dev->name); 701 return -1; 702 } 703 704 snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT, 705 dev->addr.domain, dev->addr.bus, 706 dev->addr.devid, dev->addr.function); 707 708 fp = fopen("/proc/ioports", "r"); 709 if (fp == NULL) { 710 RTE_LOG(ERR, EAL, "%s(): can't open ioports\n", __func__); 711 return -1; 712 } 713 714 while (getdelim(&line, &linesz, '\n', fp) > 0) { 715 char *ptr = line; 716 char *left; 717 int n; 718 719 n = strcspn(ptr, ":"); 720 ptr[n] = 0; 721 left = &ptr[n + 1]; 722 723 while (*left && isspace(*left)) 724 left++; 725 726 if (!strncmp(left, pci_id, strlen(pci_id))) { 727 found = 1; 728 729 while (*ptr && isspace(*ptr)) 730 ptr++; 731 732 sscanf(ptr, "%04hx-%04hx", &start, &end); 733 734 break; 735 } 736 } 737 738 free(line); 739 fclose(fp); 740 741 if (!found) 742 return -1; 743 744 p->base = start; 745 RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start); 746 747 return 0; 748 } 749 #endif 750 751 int 752 rte_pci_ioport_map(struct rte_pci_device *dev, int bar, 753 struct rte_pci_ioport *p) 754 { 755 int ret = -1; 756 757 switch (dev->kdrv) { 758 #ifdef VFIO_PRESENT 759 case RTE_KDRV_VFIO: 760 if (pci_vfio_is_enabled()) 761 ret = pci_vfio_ioport_map(dev, bar, p); 762 break; 763 #endif 764 case RTE_KDRV_IGB_UIO: 765 ret = pci_uio_ioport_map(dev, bar, p); 766 break; 767 case RTE_KDRV_UIO_GENERIC: 768 #if defined(RTE_ARCH_X86) 769 ret = pci_ioport_map(dev, bar, p); 770 #else 771 ret = pci_uio_ioport_map(dev, bar, p); 772 #endif 773 break; 774 case RTE_KDRV_NONE: 775 #if defined(RTE_ARCH_X86) 776 ret = pci_ioport_map(dev, bar, p); 777 #endif 778 break; 779 default: 780 break; 781 } 782 783 if (!ret) 784 p->dev = dev; 785 786 return ret; 787 } 788 789 void 790 rte_pci_ioport_read(struct rte_pci_ioport *p, 791 void *data, size_t len, off_t offset) 792 { 793 switch (p->dev->kdrv) { 794 #ifdef VFIO_PRESENT 795 case RTE_KDRV_VFIO: 796 pci_vfio_ioport_read(p, data, len, offset); 797 break; 798 #endif 799 case RTE_KDRV_IGB_UIO: 800 pci_uio_ioport_read(p, data, len, offset); 801 break; 802 case RTE_KDRV_UIO_GENERIC: 803 pci_uio_ioport_read(p, data, len, offset); 804 break; 805 case RTE_KDRV_NONE: 806 #if defined(RTE_ARCH_X86) 807 pci_uio_ioport_read(p, data, len, offset); 808 #endif 809 break; 810 default: 811 break; 812 } 813 } 814 815 void 816 rte_pci_ioport_write(struct rte_pci_ioport *p, 817 const void *data, size_t len, off_t offset) 818 { 819 switch (p->dev->kdrv) { 820 #ifdef VFIO_PRESENT 821 case RTE_KDRV_VFIO: 822 pci_vfio_ioport_write(p, data, len, offset); 823 break; 824 #endif 825 case RTE_KDRV_IGB_UIO: 826 pci_uio_ioport_write(p, data, len, offset); 827 break; 828 case RTE_KDRV_UIO_GENERIC: 829 pci_uio_ioport_write(p, data, len, offset); 830 break; 831 case RTE_KDRV_NONE: 832 #if defined(RTE_ARCH_X86) 833 pci_uio_ioport_write(p, data, len, offset); 834 #endif 835 break; 836 default: 837 break; 838 } 839 } 840 841 int 842 rte_pci_ioport_unmap(struct rte_pci_ioport *p) 843 { 844 int ret = -1; 845 846 switch (p->dev->kdrv) { 847 #ifdef VFIO_PRESENT 848 case RTE_KDRV_VFIO: 849 if (pci_vfio_is_enabled()) 850 ret = pci_vfio_ioport_unmap(p); 851 break; 852 #endif 853 case RTE_KDRV_IGB_UIO: 854 ret = pci_uio_ioport_unmap(p); 855 break; 856 case RTE_KDRV_UIO_GENERIC: 857 #if defined(RTE_ARCH_X86) 858 ret = 0; 859 #else 860 ret = pci_uio_ioport_unmap(p); 861 #endif 862 break; 863 case RTE_KDRV_NONE: 864 #if defined(RTE_ARCH_X86) 865 ret = 0; 866 #endif 867 break; 868 default: 869 break; 870 } 871 872 return ret; 873 } 874