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