LXR dpdk/drivers/bus/pci/linux/pci.c

   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 using Linux sysfs.
  25 */
  26
  27extern struct rte_pci_bus rte_pci_bus;
  28
  29static int
  30pci_get_kernel_driver_by_path(const char *filename, char *dri_name,
  31                              size_t len)
  32{
  33        int count;
  34        char path[PATH_MAX];
  35        char *name;
  36
  37        if (!filename || !dri_name)
  38                return -1;
  39
  40        count = readlink(filename, path, PATH_MAX);
  41        if (count >= PATH_MAX)
  42                return -1;
  43
  44        /* For device does not have a driver */
  45        if (count < 0)
  46                return 1;
  47
  48        path[count] = '\0';
  49
  50        name = strrchr(path, '/');
  51        if (name) {
  52                strlcpy(dri_name, name + 1, len);
  53                return 0;
  54        }
  55
  56        return -1;
  57}
  58
  59/* Map pci device */
  60int
  61rte_pci_map_device(struct rte_pci_device *dev)
  62{
  63        int ret = -1;
  64
  65        /* try mapping the NIC resources using VFIO if it exists */
  66        switch (dev->kdrv) {
  67        case RTE_PCI_KDRV_VFIO:
  68#ifdef VFIO_PRESENT
  69                if (pci_vfio_is_enabled())
  70                        ret = pci_vfio_map_resource(dev);
  71#endif
  72                break;
  73        case RTE_PCI_KDRV_IGB_UIO:
  74        case RTE_PCI_KDRV_UIO_GENERIC:
  75                if (rte_eal_using_phys_addrs()) {
  76                        /* map resources for devices that use uio */
  77                        ret = pci_uio_map_resource(dev);
  78                }
  79                break;
  80        default:
  81                RTE_LOG(DEBUG, EAL,
  82                        "  Not managed by a supported kernel driver, skipped\n");
  83                ret = 1;
  84                break;
  85        }
  86
  87        return ret;
  88}
  89
  90/* Unmap pci device */
  91void
  92rte_pci_unmap_device(struct rte_pci_device *dev)
  93{
  94        /* try unmapping the NIC resources using VFIO if it exists */
  95        switch (dev->kdrv) {
  96        case RTE_PCI_KDRV_VFIO:
  97#ifdef VFIO_PRESENT
  98                if (pci_vfio_is_enabled())
  99                        pci_vfio_unmap_resource(dev);
 100#endif
 101                break;
 102        case RTE_PCI_KDRV_IGB_UIO:
 103        case RTE_PCI_KDRV_UIO_GENERIC:
 104                /* unmap resources for devices that use uio */
 105                pci_uio_unmap_resource(dev);
 106                break;
 107        default:
 108                RTE_LOG(DEBUG, EAL,
 109                        "  Not managed by a supported kernel driver, skipped\n");
 110                break;
 111        }
 112}
 113
 114static int
 115find_max_end_va(const struct rte_memseg_list *msl, void *arg)
 116{
 117        size_t sz = msl->len;
 118        void *end_va = RTE_PTR_ADD(msl->base_va, sz);
 119        void **max_va = arg;
 120
 121        if (*max_va < end_va)
 122                *max_va = end_va;
 123        return 0;
 124}
 125
 126void *
 127pci_find_max_end_va(void)
 128{
 129        void *va = NULL;
 130
 131        rte_memseg_list_walk(find_max_end_va, &va);
 132        return va;
 133}
 134
 135
 136/* parse one line of the "resource" sysfs file (note that the 'line'
 137 * string is modified)
 138 */
 139int
 140pci_parse_one_sysfs_resource(char *line, size_t len, uint64_t *phys_addr,
 141        uint64_t *end_addr, uint64_t *flags)
 142{
 143        union pci_resource_info {
 144                struct {
 145                        char *phys_addr;
 146                        char *end_addr;
 147                        char *flags;
 148                };
 149                char *ptrs[PCI_RESOURCE_FMT_NVAL];
 150        } res_info;
 151
 152        if (rte_strsplit(line, len, res_info.ptrs, 3, ' ') != 3) {
 153                RTE_LOG(ERR, EAL,
 154                        "%s(): bad resource format\n", __func__);
 155                return -1;
 156        }
 157        errno = 0;
 158        *phys_addr = strtoull(res_info.phys_addr, NULL, 16);
 159        *end_addr = strtoull(res_info.end_addr, NULL, 16);
 160        *flags = strtoull(res_info.flags, NULL, 16);
 161        if (errno != 0) {
 162                RTE_LOG(ERR, EAL,
 163                        "%s(): bad resource format\n", __func__);
 164                return -1;
 165        }
 166
 167        return 0;
 168}
 169
 170/* parse the "resource" sysfs file */
 171static int
 172pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
 173{
 174        FILE *f;
 175        char buf[BUFSIZ];
 176        int i;
 177        uint64_t phys_addr, end_addr, flags;
 178
 179        f = fopen(filename, "r");
 180        if (f == NULL) {
 181                RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n");
 182                return -1;
 183        }
 184
 185        for (i = 0; i<PCI_MAX_RESOURCE; i++) {
 186
 187                if (fgets(buf, sizeof(buf), f) == NULL) {
 188                        RTE_LOG(ERR, EAL,
 189                                "%s(): cannot read resource\n", __func__);
 190                        goto error;
 191                }
 192                if (pci_parse_one_sysfs_resource(buf, sizeof(buf), &phys_addr,
 193                                &end_addr, &flags) < 0)
 194                        goto error;
 195
 196                if (flags & IORESOURCE_MEM) {
 197                        dev->mem_resource[i].phys_addr = phys_addr;
 198                        dev->mem_resource[i].len = end_addr - phys_addr + 1;
 199                        /* not mapped for now */
 200                        dev->mem_resource[i].addr = NULL;
 201                }
 202        }
 203        fclose(f);
 204        return 0;
 205
 206error:
 207        fclose(f);
 208        return -1;
 209}
 210
 211/* Scan one pci sysfs entry, and fill the devices list from it. */
 212static int
 213pci_scan_one(const char *dirname, const struct rte_pci_addr *addr)
 214{
 215        char filename[PATH_MAX];
 216        unsigned long tmp;
 217        struct rte_pci_device *dev;
 218        char driver[PATH_MAX];
 219        int ret;
 220
 221        dev = malloc(sizeof(*dev));
 222        if (dev == NULL)
 223                return -1;
 224
 225        memset(dev, 0, sizeof(*dev));
 226        dev->device.bus = &rte_pci_bus.bus;
 227        dev->addr = *addr;
 228
 229        /* get vendor id */
 230        snprintf(filename, sizeof(filename), "%s/vendor", dirname);
 231        if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 232                free(dev);
 233                return -1;
 234        }
 235        dev->id.vendor_id = (uint16_t)tmp;
 236
 237        /* get device id */
 238        snprintf(filename, sizeof(filename), "%s/device", dirname);
 239        if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 240                free(dev);
 241                return -1;
 242        }
 243        dev->id.device_id = (uint16_t)tmp;
 244
 245        /* get subsystem_vendor id */
 246        snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
 247                 dirname);
 248        if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 249                free(dev);
 250                return -1;
 251        }
 252        dev->id.subsystem_vendor_id = (uint16_t)tmp;
 253
 254        /* get subsystem_device id */
 255        snprintf(filename, sizeof(filename), "%s/subsystem_device",
 256                 dirname);
 257        if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 258                free(dev);
 259                return -1;
 260        }
 261        dev->id.subsystem_device_id = (uint16_t)tmp;
 262
 263        /* get class_id */
 264        snprintf(filename, sizeof(filename), "%s/class",
 265                 dirname);
 266        if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 267                free(dev);
 268                return -1;
 269        }
 270        /* the least 24 bits are valid: class, subclass, program interface */
 271        dev->id.class_id = (uint32_t)tmp & RTE_CLASS_ANY_ID;
 272
 273        /* get max_vfs */
 274        dev->max_vfs = 0;
 275        snprintf(filename, sizeof(filename), "%s/max_vfs", dirname);
 276        if (!access(filename, F_OK) &&
 277            eal_parse_sysfs_value(filename, &tmp) == 0)
 278                dev->max_vfs = (uint16_t)tmp;
 279        else {
 280                /* for non igb_uio driver, need kernel version >= 3.8 */
 281                snprintf(filename, sizeof(filename),
 282                         "%s/sriov_numvfs", dirname);
 283                if (!access(filename, F_OK) &&
 284                    eal_parse_sysfs_value(filename, &tmp) == 0)
 285                        dev->max_vfs = (uint16_t)tmp;
 286        }
 287
 288        /* get numa node, default to 0 if not present */
 289        snprintf(filename, sizeof(filename), "%s/numa_node",
 290                 dirname);
 291
 292        if (access(filename, F_OK) != -1) {
 293                if (eal_parse_sysfs_value(filename, &tmp) == 0)
 294                        dev->device.numa_node = tmp;
 295                else
 296                        dev->device.numa_node = -1;
 297        } else {
 298                dev->device.numa_node = 0;
 299        }
 300
 301        pci_name_set(dev);
 302
 303        /* parse resources */
 304        snprintf(filename, sizeof(filename), "%s/resource", dirname);
 305        if (pci_parse_sysfs_resource(filename, dev) < 0) {
 306                RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__);
 307                free(dev);
 308                return -1;
 309        }
 310
 311        /* parse driver */
 312        snprintf(filename, sizeof(filename), "%s/driver", dirname);
 313        ret = pci_get_kernel_driver_by_path(filename, driver, sizeof(driver));
 314        if (ret < 0) {
 315                RTE_LOG(ERR, EAL, "Fail to get kernel driver\n");
 316                free(dev);
 317                return -1;
 318        }
 319
 320        if (!ret) {
 321                if (!strcmp(driver, "vfio-pci"))
 322                        dev->kdrv = RTE_PCI_KDRV_VFIO;
 323                else if (!strcmp(driver, "igb_uio"))
 324                        dev->kdrv = RTE_PCI_KDRV_IGB_UIO;
 325                else if (!strcmp(driver, "uio_pci_generic"))
 326                        dev->kdrv = RTE_PCI_KDRV_UIO_GENERIC;
 327                else
 328                        dev->kdrv = RTE_PCI_KDRV_UNKNOWN;
 329        } else {
 330                free(dev);
 331                return 0;
 332        }
 333        /* device is valid, add in list (sorted) */
 334        if (TAILQ_EMPTY(&rte_pci_bus.device_list)) {
 335                rte_pci_add_device(dev);
 336        } else {
 337                struct rte_pci_device *dev2;
 338                int ret;
 339
 340                TAILQ_FOREACH(dev2, &rte_pci_bus.device_list, next) {
 341                        ret = rte_pci_addr_cmp(&dev->addr, &dev2->addr);
 342                        if (ret > 0)
 343                                continue;
 344
 345                        if (ret < 0) {
 346                                rte_pci_insert_device(dev2, dev);
 347                        } else { /* already registered */
 348                                if (!rte_dev_is_probed(&dev2->device)) {
 349                                        dev2->kdrv = dev->kdrv;
 350                                        dev2->max_vfs = dev->max_vfs;
 351                                        dev2->id = dev->id;
 352                                        pci_name_set(dev2);
 353                                        memmove(dev2->mem_resource,
 354                                                dev->mem_resource,
 355                                                sizeof(dev->mem_resource));
 356                                } else {
 357                                        /**
 358                                         * If device is plugged and driver is
 359                                         * probed already, (This happens when
 360                                         * we call rte_dev_probe which will
 361                                         * scan all device on the bus) we don't
 362                                         * need to do anything here unless...
 363                                         **/
 364                                        if (dev2->kdrv != dev->kdrv ||
 365                                                dev2->max_vfs != dev->max_vfs ||
 366                                                memcmp(&dev2->id, &dev->id, sizeof(dev2->id)))
 367                                                /*
 368                                                 * This should not happens.
 369                                                 * But it is still possible if
 370                                                 * we unbind a device from
 371                                                 * vfio or uio before hotplug
 372                                                 * remove and rebind it with
 373                                                 * a different configure.
 374                                                 * So we just print out the
 375                                                 * error as an alarm.
 376                                                 */
 377                                                RTE_LOG(ERR, EAL, "Unexpected device scan at %s!\n",
 378                                                        filename);
 379                                        else if (dev2->device.devargs !=
 380                                                 dev->device.devargs) {
 381                                                rte_devargs_remove(dev2->device.devargs);
 382                                                pci_name_set(dev2);
 383                                        }
 384                                }
 385                                free(dev);
 386                        }
 387                        return 0;
 388                }
 389
 390                rte_pci_add_device(dev);
 391        }
 392
 393        return 0;
 394}
 395
 396/*
 397 * split up a pci address into its constituent parts.
 398 */
 399static int
 400parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr)
 401{
 402        /* first split on ':' */
 403        union splitaddr {
 404                struct {
 405                        char *domain;
 406                        char *bus;
 407                        char *devid;
 408                        char *function;
 409                };
 410                char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */
 411        } splitaddr;
 412
 413        char *buf_copy = strndup(buf, bufsize);
 414        if (buf_copy == NULL)
 415                return -1;
 416
 417        if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
 418                        != PCI_FMT_NVAL - 1)
 419                goto error;
 420        /* final split is on '.' between devid and function */
 421        splitaddr.function = strchr(splitaddr.devid,'.');
 422        if (splitaddr.function == NULL)
 423                goto error;
 424        *splitaddr.function++ = '\0';
 425
 426        /* now convert to int values */
 427        errno = 0;
 428        addr->domain = strtoul(splitaddr.domain, NULL, 16);
 429        addr->bus = strtoul(splitaddr.bus, NULL, 16);
 430        addr->devid = strtoul(splitaddr.devid, NULL, 16);
 431        addr->function = strtoul(splitaddr.function, NULL, 10);
 432        if (errno != 0)
 433                goto error;
 434
 435        free(buf_copy); /* free the copy made with strdup */
 436        return 0;
 437error:
 438        free(buf_copy);
 439        return -1;
 440}
 441
 442/*
 443 * Scan the content of the PCI bus, and the devices in the devices
 444 * list
 445 */
 446int
 447rte_pci_scan(void)
 448{
 449        struct dirent *e;
 450        DIR *dir;
 451        char dirname[PATH_MAX];
 452        struct rte_pci_addr addr;
 453
 454        /* for debug purposes, PCI can be disabled */
 455        if (!rte_eal_has_pci())
 456                return 0;
 457
 458#ifdef VFIO_PRESENT
 459        if (!pci_vfio_is_enabled())
 460                RTE_LOG(DEBUG, EAL, "VFIO PCI modules not loaded\n");
 461#endif
 462
 463        dir = opendir(rte_pci_get_sysfs_path());
 464        if (dir == NULL) {
 465                RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n",
 466                        __func__, strerror(errno));
 467                return -1;
 468        }
 469
 470        while ((e = readdir(dir)) != NULL) {
 471                if (e->d_name[0] == '.')
 472                        continue;
 473
 474                if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0)
 475                        continue;
 476
 477                if (rte_pci_ignore_device(&addr))
 478                        continue;
 479
 480                snprintf(dirname, sizeof(dirname), "%s/%s",
 481                                rte_pci_get_sysfs_path(), e->d_name);
 482
 483                if (pci_scan_one(dirname, &addr) < 0)
 484                        goto error;
 485        }
 486        closedir(dir);
 487        return 0;
 488
 489error:
 490        closedir(dir);
 491        return -1;
 492}
 493
 494#if defined(RTE_ARCH_X86)
 495bool
 496pci_device_iommu_support_va(const struct rte_pci_device *dev)
 497{
 498#define VTD_CAP_MGAW_SHIFT      16
 499#define VTD_CAP_MGAW_MASK       (0x3fULL << VTD_CAP_MGAW_SHIFT)
 500        const struct rte_pci_addr *addr = &dev->addr;
 501        char filename[PATH_MAX];
 502        FILE *fp;
 503        uint64_t mgaw, vtd_cap_reg = 0;
 504
 505        snprintf(filename, sizeof(filename),
 506                 "%s/" PCI_PRI_FMT "/iommu/intel-iommu/cap",
 507                 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid,
 508                 addr->function);
 509
 510        fp = fopen(filename, "r");
 511        if (fp == NULL) {
 512                /* We don't have an Intel IOMMU, assume VA supported */
 513                if (errno == ENOENT)
 514                        return true;
 515
 516                RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n",
 517                        __func__, filename, strerror(errno));
 518                return false;
 519        }
 520
 521        /* We have an Intel IOMMU */
 522        if (fscanf(fp, "%" PRIx64, &vtd_cap_reg) != 1) {
 523                RTE_LOG(ERR, EAL, "%s(): can't read %s\n", __func__, filename);
 524                fclose(fp);
 525                return false;
 526        }
 527
 528        fclose(fp);
 529
 530        mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1;
 531
 532        /*
 533         * Assuming there is no limitation by now. We can not know at this point
 534         * because the memory has not been initialized yet. Setting the dma mask
 535         * will force a check once memory initialization is done. We can not do
 536         * a fallback to IOVA PA now, but if the dma check fails, the error
 537         * message should advice for using '--iova-mode pa' if IOVA VA is the
 538         * current mode.
 539         */
 540        rte_mem_set_dma_mask(mgaw);
 541        return true;
 542}
 543#elif defined(RTE_ARCH_PPC_64)
 544bool
 545pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev)
 546{
 547        /*
 548         * All POWER systems support an IOMMU, but only IOMMUv2 supports
 549         * IOVA = VA in DPDK. Check contents of /proc/cpuinfo to find the
 550         * system.
 551         *
 552         * Platform | Model |  IOMMU  | VA? |             Comment
 553         * ---------+-------+---------+-----+---------------------------------
 554         *  PowerNV |  N/A  | IOMMUv2 | Yes | OpenPOWER (Bare Metal)
 555         *  pSeries | ~qemu | IOMMUv2 | Yes | PowerVM Logical Partition (LPAR)
 556         *  pSeries |  qemu | IOMMUv1 |  No | QEMU Virtual Machine
 557         */
 558
 559        char *line = NULL;
 560        size_t len = 0;
 561        char filename[PATH_MAX] = "/proc/cpuinfo";
 562        FILE *fp = fopen(filename, "r");
 563        bool pseries = false, powernv = false, qemu = false;
 564        bool ret = false;
 565
 566        if (fp == NULL) {
 567                RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n",
 568                        __func__, filename, strerror(errno));
 569                return ret;
 570        }
 571
 572        /* Check the "platform" and "model" fields */
 573        while (getline(&line, &len, fp) != -1) {
 574                if (strstr(line, "platform") != NULL) {
 575                        if (strstr(line, "PowerNV") != NULL) {
 576                                RTE_LOG(DEBUG, EAL, "Running on a PowerNV platform\n");
 577                                powernv = true;
 578                        } else if (strstr(line, "pSeries") != NULL) {
 579                                RTE_LOG(DEBUG, EAL, "Running on a pSeries platform\n");
 580                                pseries = true;
 581                        }
 582                } else if (strstr(line, "model") != NULL) {
 583                        if (strstr(line, "qemu") != NULL) {
 584                                RTE_LOG(DEBUG, EAL, "Found qemu emulation\n");
 585                                qemu = true;
 586                        }
 587                }
 588        }
 589
 590        free(line);
 591        fclose(fp);
 592
 593        if (powernv || (pseries && !qemu))
 594                ret = true;
 595        return ret;
 596}
 597#else
 598bool
 599pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev)
 600{
 601        return true;
 602}
 603#endif
 604
 605enum rte_iova_mode
 606pci_device_iova_mode(const struct rte_pci_driver *pdrv,
 607                     const struct rte_pci_device *pdev)
 608{
 609        enum rte_iova_mode iova_mode = RTE_IOVA_DC;
 610
 611        switch (pdev->kdrv) {
 612        case RTE_PCI_KDRV_VFIO: {
 613#ifdef VFIO_PRESENT
 614                static int is_vfio_noiommu_enabled = -1;
 615
 616                if (is_vfio_noiommu_enabled == -1) {
 617                        if (rte_vfio_noiommu_is_enabled() == 1)
 618                                is_vfio_noiommu_enabled = 1;
 619                        else
 620                                is_vfio_noiommu_enabled = 0;
 621                }
 622                if (is_vfio_noiommu_enabled != 0)
 623                        iova_mode = RTE_IOVA_PA;
 624                else if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0)
 625                        iova_mode = RTE_IOVA_VA;
 626#endif
 627                break;
 628        }
 629
 630        case RTE_PCI_KDRV_IGB_UIO:
 631        case RTE_PCI_KDRV_UIO_GENERIC:
 632                iova_mode = RTE_IOVA_PA;
 633                break;
 634
 635        default:
 636                if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0)
 637                        iova_mode = RTE_IOVA_VA;
 638                break;
 639        }
 640        return iova_mode;
 641}
 642
 643/* Read PCI config space. */
 644int rte_pci_read_config(const struct rte_pci_device *device,
 645                void *buf, size_t len, off_t offset)
 646{
 647        char devname[RTE_DEV_NAME_MAX_LEN] = "";
 648        const struct rte_intr_handle *intr_handle = device->intr_handle;
 649
 650        switch (device->kdrv) {
 651        case RTE_PCI_KDRV_IGB_UIO:
 652        case RTE_PCI_KDRV_UIO_GENERIC:
 653                return pci_uio_read_config(intr_handle, buf, len, offset);
 654#ifdef VFIO_PRESENT
 655        case RTE_PCI_KDRV_VFIO:
 656                return pci_vfio_read_config(intr_handle, buf, len, offset);
 657#endif
 658        default:
 659                rte_pci_device_name(&device->addr, devname,
 660                                    RTE_DEV_NAME_MAX_LEN);
 661                RTE_LOG(ERR, EAL,
 662                        "Unknown driver type for %s\n", devname);
 663                return -1;
 664        }
 665}
 666
 667/* Write PCI config space. */
 668int rte_pci_write_config(const struct rte_pci_device *device,
 669                const void *buf, size_t len, off_t offset)
 670{
 671        char devname[RTE_DEV_NAME_MAX_LEN] = "";
 672        const struct rte_intr_handle *intr_handle = device->intr_handle;
 673
 674        switch (device->kdrv) {
 675        case RTE_PCI_KDRV_IGB_UIO:
 676        case RTE_PCI_KDRV_UIO_GENERIC:
 677                return pci_uio_write_config(intr_handle, buf, len, offset);
 678#ifdef VFIO_PRESENT
 679        case RTE_PCI_KDRV_VFIO:
 680                return pci_vfio_write_config(intr_handle, buf, len, offset);
 681#endif
 682        default:
 683                rte_pci_device_name(&device->addr, devname,
 684                                    RTE_DEV_NAME_MAX_LEN);
 685                RTE_LOG(ERR, EAL,
 686                        "Unknown driver type for %s\n", devname);
 687                return -1;
 688        }
 689}
 690
 691int
 692rte_pci_ioport_map(struct rte_pci_device *dev, int bar,
 693                struct rte_pci_ioport *p)
 694{
 695        int ret = -1;
 696
 697        switch (dev->kdrv) {
 698#ifdef VFIO_PRESENT
 699        case RTE_PCI_KDRV_VFIO:
 700                if (pci_vfio_is_enabled())
 701                        ret = pci_vfio_ioport_map(dev, bar, p);
 702                break;
 703#endif
 704        case RTE_PCI_KDRV_IGB_UIO:
 705        case RTE_PCI_KDRV_UIO_GENERIC:
 706                ret = pci_uio_ioport_map(dev, bar, p);
 707                break;
 708        default:
 709                break;
 710        }
 711
 712        if (!ret)
 713                p->dev = dev;
 714
 715        return ret;
 716}
 717
 718void
 719rte_pci_ioport_read(struct rte_pci_ioport *p,
 720                void *data, size_t len, off_t offset)
 721{
 722        switch (p->dev->kdrv) {
 723#ifdef VFIO_PRESENT
 724        case RTE_PCI_KDRV_VFIO:
 725                pci_vfio_ioport_read(p, data, len, offset);
 726                break;
 727#endif
 728        case RTE_PCI_KDRV_IGB_UIO:
 729        case RTE_PCI_KDRV_UIO_GENERIC:
 730                pci_uio_ioport_read(p, data, len, offset);
 731                break;
 732        default:
 733                break;
 734        }
 735}
 736
 737void
 738rte_pci_ioport_write(struct rte_pci_ioport *p,
 739                const void *data, size_t len, off_t offset)
 740{
 741        switch (p->dev->kdrv) {
 742#ifdef VFIO_PRESENT
 743        case RTE_PCI_KDRV_VFIO:
 744                pci_vfio_ioport_write(p, data, len, offset);
 745                break;
 746#endif
 747        case RTE_PCI_KDRV_IGB_UIO:
 748        case RTE_PCI_KDRV_UIO_GENERIC:
 749                pci_uio_ioport_write(p, data, len, offset);
 750                break;
 751        default:
 752                break;
 753        }
 754}
 755
 756int
 757rte_pci_ioport_unmap(struct rte_pci_ioport *p)
 758{
 759        int ret = -1;
 760
 761        switch (p->dev->kdrv) {
 762#ifdef VFIO_PRESENT
 763        case RTE_PCI_KDRV_VFIO:
 764                if (pci_vfio_is_enabled())
 765                        ret = pci_vfio_ioport_unmap(p);
 766                break;
 767#endif
 768        case RTE_PCI_KDRV_IGB_UIO:
 769        case RTE_PCI_KDRV_UIO_GENERIC:
 770                ret = pci_uio_ioport_unmap(p);
 771                break;
 772        default:
 773                break;
 774        }
 775
 776        return ret;
 777}
 778