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