+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <string.h>
-#include <dirent.h>
-
-#include <rte_log.h>
-#include <rte_bus.h>
-#include <rte_pci.h>
-#include <rte_eal_memconfig.h>
-#include <rte_malloc.h>
-#include <rte_devargs.h>
-#include <rte_memcpy.h>
-
-#include "eal_filesystem.h"
-#include "eal_private.h"
-#include "eal_pci_init.h"
-
-/**
- * @file
- * PCI probing under linux
- *
- * This code is used to simulate a PCI probe by parsing information in sysfs.
- * When a registered device matches a driver, it is then initialized with
- * IGB_UIO driver (or doesn't initialize, if the device wasn't bound to it).
- */
-
-extern struct rte_pci_bus rte_pci_bus;
-
-static int
-pci_get_kernel_driver_by_path(const char *filename, char *dri_name)
-{
- int count;
- char path[PATH_MAX];
- char *name;
-
- if (!filename || !dri_name)
- return -1;
-
- count = readlink(filename, path, PATH_MAX);
- if (count >= PATH_MAX)
- return -1;
-
- /* For device does not have a driver */
- if (count < 0)
- return 1;
-
- path[count] = '\0';
-
- name = strrchr(path, '/');
- if (name) {
- strncpy(dri_name, name + 1, strlen(name + 1) + 1);
- return 0;
- }
-
- return -1;
-}
-
-/* Map pci device */
-int
-rte_pci_map_device(struct rte_pci_device *dev)
-{
- int ret = -1;
-
- /* try mapping the NIC resources using VFIO if it exists */
- switch (dev->kdrv) {
- case RTE_KDRV_VFIO:
-#ifdef VFIO_PRESENT
- if (pci_vfio_is_enabled())
- ret = pci_vfio_map_resource(dev);
-#endif
- break;
- case RTE_KDRV_IGB_UIO:
- case RTE_KDRV_UIO_GENERIC:
- if (rte_eal_using_phys_addrs()) {
- /* map resources for devices that use uio */
- ret = pci_uio_map_resource(dev);
- }
- break;
- default:
- RTE_LOG(DEBUG, EAL,
- " Not managed by a supported kernel driver, skipped\n");
- ret = 1;
- break;
- }
-
- return ret;
-}
-
-/* Unmap pci device */
-void
-rte_pci_unmap_device(struct rte_pci_device *dev)
-{
- /* try unmapping the NIC resources using VFIO if it exists */
- switch (dev->kdrv) {
- case RTE_KDRV_VFIO:
-#ifdef VFIO_PRESENT
- if (pci_vfio_is_enabled())
- pci_vfio_unmap_resource(dev);
-#endif
- break;
- case RTE_KDRV_IGB_UIO:
- case RTE_KDRV_UIO_GENERIC:
- /* unmap resources for devices that use uio */
- pci_uio_unmap_resource(dev);
- break;
- default:
- RTE_LOG(DEBUG, EAL,
- " Not managed by a supported kernel driver, skipped\n");
- break;
- }
-}
-
-void *
-pci_find_max_end_va(void)
-{
- const struct rte_memseg *seg = rte_eal_get_physmem_layout();
- const struct rte_memseg *last = seg;
- unsigned i = 0;
-
- for (i = 0; i < RTE_MAX_MEMSEG; i++, seg++) {
- if (seg->addr == NULL)
- break;
-
- if (seg->addr > last->addr)
- last = seg;
-
- }
- return RTE_PTR_ADD(last->addr, last->len);
-}
-
-/* parse one line of the "resource" sysfs file (note that the 'line'
- * string is modified)
- */
-int
-pci_parse_one_sysfs_resource(char *line, size_t len, uint64_t *phys_addr,
- uint64_t *end_addr, uint64_t *flags)
-{
- union pci_resource_info {
- struct {
- char *phys_addr;
- char *end_addr;
- char *flags;
- };
- char *ptrs[PCI_RESOURCE_FMT_NVAL];
- } res_info;
-
- if (rte_strsplit(line, len, res_info.ptrs, 3, ' ') != 3) {
- RTE_LOG(ERR, EAL,
- "%s(): bad resource format\n", __func__);
- return -1;
- }
- errno = 0;
- *phys_addr = strtoull(res_info.phys_addr, NULL, 16);
- *end_addr = strtoull(res_info.end_addr, NULL, 16);
- *flags = strtoull(res_info.flags, NULL, 16);
- if (errno != 0) {
- RTE_LOG(ERR, EAL,
- "%s(): bad resource format\n", __func__);
- return -1;
- }
-
- return 0;
-}
-
-/* parse the "resource" sysfs file */
-static int
-pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
-{
- FILE *f;
- char buf[BUFSIZ];
- int i;
- uint64_t phys_addr, end_addr, flags;
-
- f = fopen(filename, "r");
- if (f == NULL) {
- RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n");
- return -1;
- }
-
- for (i = 0; i<PCI_MAX_RESOURCE; i++) {
-
- if (fgets(buf, sizeof(buf), f) == NULL) {
- RTE_LOG(ERR, EAL,
- "%s(): cannot read resource\n", __func__);
- goto error;
- }
- if (pci_parse_one_sysfs_resource(buf, sizeof(buf), &phys_addr,
- &end_addr, &flags) < 0)
- goto error;
-
- if (flags & IORESOURCE_MEM) {
- dev->mem_resource[i].phys_addr = phys_addr;
- dev->mem_resource[i].len = end_addr - phys_addr + 1;
- /* not mapped for now */
- dev->mem_resource[i].addr = NULL;
- }
- }
- fclose(f);
- return 0;
-
-error:
- fclose(f);
- return -1;
-}
-
-/* Scan one pci sysfs entry, and fill the devices list from it. */
-static int
-pci_scan_one(const char *dirname, const struct rte_pci_addr *addr)
-{
- char filename[PATH_MAX];
- unsigned long tmp;
- struct rte_pci_device *dev;
- char driver[PATH_MAX];
- int ret;
-
- dev = malloc(sizeof(*dev));
- if (dev == NULL)
- return -1;
-
- memset(dev, 0, sizeof(*dev));
- dev->addr = *addr;
-
- /* get vendor id */
- snprintf(filename, sizeof(filename), "%s/vendor", dirname);
- if (eal_parse_sysfs_value(filename, &tmp) < 0) {
- free(dev);
- return -1;
- }
- dev->id.vendor_id = (uint16_t)tmp;
-
- /* get device id */
- snprintf(filename, sizeof(filename), "%s/device", dirname);
- if (eal_parse_sysfs_value(filename, &tmp) < 0) {
- free(dev);
- return -1;
- }
- dev->id.device_id = (uint16_t)tmp;
-
- /* get subsystem_vendor id */
- snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
- dirname);
- if (eal_parse_sysfs_value(filename, &tmp) < 0) {
- free(dev);
- return -1;
- }
- dev->id.subsystem_vendor_id = (uint16_t)tmp;
-
- /* get subsystem_device id */
- snprintf(filename, sizeof(filename), "%s/subsystem_device",
- dirname);
- if (eal_parse_sysfs_value(filename, &tmp) < 0) {
- free(dev);
- return -1;
- }
- dev->id.subsystem_device_id = (uint16_t)tmp;
-
- /* get class_id */
- snprintf(filename, sizeof(filename), "%s/class",
- dirname);
- if (eal_parse_sysfs_value(filename, &tmp) < 0) {
- free(dev);
- return -1;
- }
- /* the least 24 bits are valid: class, subclass, program interface */
- dev->id.class_id = (uint32_t)tmp & RTE_CLASS_ANY_ID;
-
- /* get max_vfs */
- dev->max_vfs = 0;
- snprintf(filename, sizeof(filename), "%s/max_vfs", dirname);
- if (!access(filename, F_OK) &&
- eal_parse_sysfs_value(filename, &tmp) == 0)
- dev->max_vfs = (uint16_t)tmp;
- else {
- /* for non igb_uio driver, need kernel version >= 3.8 */
- snprintf(filename, sizeof(filename),
- "%s/sriov_numvfs", dirname);
- if (!access(filename, F_OK) &&
- eal_parse_sysfs_value(filename, &tmp) == 0)
- dev->max_vfs = (uint16_t)tmp;
- }
-
- /* get numa node, default to 0 if not present */
- snprintf(filename, sizeof(filename), "%s/numa_node",
- dirname);
-
- if (access(filename, F_OK) != -1) {
- if (eal_parse_sysfs_value(filename, &tmp) == 0)
- dev->device.numa_node = tmp;
- else
- dev->device.numa_node = -1;
- } else {
- dev->device.numa_node = 0;
- }
-
- pci_name_set(dev);
-
- /* parse resources */
- snprintf(filename, sizeof(filename), "%s/resource", dirname);
- if (pci_parse_sysfs_resource(filename, dev) < 0) {
- RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__);
- free(dev);
- return -1;
- }
-
- /* parse driver */
- snprintf(filename, sizeof(filename), "%s/driver", dirname);
- ret = pci_get_kernel_driver_by_path(filename, driver);
- if (ret < 0) {
- RTE_LOG(ERR, EAL, "Fail to get kernel driver\n");
- free(dev);
- return -1;
- }
-
- if (!ret) {
- if (!strcmp(driver, "vfio-pci"))
- dev->kdrv = RTE_KDRV_VFIO;
- else if (!strcmp(driver, "igb_uio"))
- dev->kdrv = RTE_KDRV_IGB_UIO;
- else if (!strcmp(driver, "uio_pci_generic"))
- dev->kdrv = RTE_KDRV_UIO_GENERIC;
- else
- dev->kdrv = RTE_KDRV_UNKNOWN;
- } else
- dev->kdrv = RTE_KDRV_NONE;
-
- /* device is valid, add in list (sorted) */
- if (TAILQ_EMPTY(&rte_pci_bus.device_list)) {
- rte_pci_add_device(dev);
- } else {
- struct rte_pci_device *dev2;
- int ret;
-
- TAILQ_FOREACH(dev2, &rte_pci_bus.device_list, next) {
- ret = rte_eal_compare_pci_addr(&dev->addr, &dev2->addr);
- if (ret > 0)
- continue;
-
- if (ret < 0) {
- rte_pci_insert_device(dev2, dev);
- } else { /* already registered */
- dev2->kdrv = dev->kdrv;
- dev2->max_vfs = dev->max_vfs;
- pci_name_set(dev2);
- memmove(dev2->mem_resource, dev->mem_resource,
- sizeof(dev->mem_resource));
- free(dev);
- }
- return 0;
- }
-
- rte_pci_add_device(dev);
- }
-
- return 0;
-}
-
-int
-pci_update_device(const struct rte_pci_addr *addr)
-{
- char filename[PATH_MAX];
-
- snprintf(filename, sizeof(filename), "%s/" PCI_PRI_FMT,
- pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid,
- addr->function);
-
- return pci_scan_one(filename, addr);
-}
-
-/*
- * split up a pci address into its constituent parts.
- */
-static int
-parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr)
-{
- /* first split on ':' */
- union splitaddr {
- struct {
- char *domain;
- char *bus;
- char *devid;
- char *function;
- };
- char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */
- } splitaddr;
-
- char *buf_copy = strndup(buf, bufsize);
- if (buf_copy == NULL)
- return -1;
-
- if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
- != PCI_FMT_NVAL - 1)
- goto error;
- /* final split is on '.' between devid and function */
- splitaddr.function = strchr(splitaddr.devid,'.');
- if (splitaddr.function == NULL)
- goto error;
- *splitaddr.function++ = '\0';
-
- /* now convert to int values */
- errno = 0;
- addr->domain = strtoul(splitaddr.domain, NULL, 16);
- addr->bus = strtoul(splitaddr.bus, NULL, 16);
- addr->devid = strtoul(splitaddr.devid, NULL, 16);
- addr->function = strtoul(splitaddr.function, NULL, 10);
- if (errno != 0)
- goto error;
-
- free(buf_copy); /* free the copy made with strdup */
- return 0;
-error:
- free(buf_copy);
- return -1;
-}
-
-/*
- * Scan the content of the PCI bus, and the devices in the devices
- * list
- */
-int
-rte_pci_scan(void)
-{
- struct dirent *e;
- DIR *dir;
- char dirname[PATH_MAX];
- struct rte_pci_addr addr;
-
- /* for debug purposes, PCI can be disabled */
- if (internal_config.no_pci)
- return 0;
-
- dir = opendir(pci_get_sysfs_path());
- if (dir == NULL) {
- RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n",
- __func__, strerror(errno));
- return -1;
- }
-
- while ((e = readdir(dir)) != NULL) {
- if (e->d_name[0] == '.')
- continue;
-
- if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0)
- continue;
-
- snprintf(dirname, sizeof(dirname), "%s/%s",
- pci_get_sysfs_path(), e->d_name);
-
- if (pci_scan_one(dirname, &addr) < 0)
- goto error;
- }
- closedir(dir);
- return 0;
-
-error:
- closedir(dir);
- return -1;
-}
-
-/* Read PCI config space. */
-int rte_pci_read_config(const struct rte_pci_device *device,
- void *buf, size_t len, off_t offset)
-{
- const struct rte_intr_handle *intr_handle = &device->intr_handle;
-
- switch (intr_handle->type) {
- case RTE_INTR_HANDLE_UIO:
- case RTE_INTR_HANDLE_UIO_INTX:
- return pci_uio_read_config(intr_handle, buf, len, offset);
-
-#ifdef VFIO_PRESENT
- case RTE_INTR_HANDLE_VFIO_MSIX:
- case RTE_INTR_HANDLE_VFIO_MSI:
- case RTE_INTR_HANDLE_VFIO_LEGACY:
- return pci_vfio_read_config(intr_handle, buf, len, offset);
-#endif
- default:
- RTE_LOG(ERR, EAL,
- "Unknown handle type of fd %d\n",
- intr_handle->fd);
- return -1;
- }
-}
-
-/* Write PCI config space. */
-int rte_pci_write_config(const struct rte_pci_device *device,
- const void *buf, size_t len, off_t offset)
-{
- const struct rte_intr_handle *intr_handle = &device->intr_handle;
-
- switch (intr_handle->type) {
- case RTE_INTR_HANDLE_UIO:
- case RTE_INTR_HANDLE_UIO_INTX:
- return pci_uio_write_config(intr_handle, buf, len, offset);
-
-#ifdef VFIO_PRESENT
- case RTE_INTR_HANDLE_VFIO_MSIX:
- case RTE_INTR_HANDLE_VFIO_MSI:
- case RTE_INTR_HANDLE_VFIO_LEGACY:
- return pci_vfio_write_config(intr_handle, buf, len, offset);
-#endif
- default:
- RTE_LOG(ERR, EAL,
- "Unknown handle type of fd %d\n",
- intr_handle->fd);
- return -1;
- }
-}
-
-#if defined(RTE_ARCH_X86)
-static int
-pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused,
- struct rte_pci_ioport *p)
-{
- uint16_t start, end;
- FILE *fp;
- char *line = NULL;
- char pci_id[16];
- int found = 0;
- size_t linesz;
-
- snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
- dev->addr.domain, dev->addr.bus,
- dev->addr.devid, dev->addr.function);
-
- fp = fopen("/proc/ioports", "r");
- if (fp == NULL) {
- RTE_LOG(ERR, EAL, "%s(): can't open ioports\n", __func__);
- return -1;
- }
-
- while (getdelim(&line, &linesz, '\n', fp) > 0) {
- char *ptr = line;
- char *left;
- int n;
-
- n = strcspn(ptr, ":");
- ptr[n] = 0;
- left = &ptr[n + 1];
-
- while (*left && isspace(*left))
- left++;
-
- if (!strncmp(left, pci_id, strlen(pci_id))) {
- found = 1;
-
- while (*ptr && isspace(*ptr))
- ptr++;
-
- sscanf(ptr, "%04hx-%04hx", &start, &end);
-
- break;
- }
- }
-
- free(line);
- fclose(fp);
-
- if (!found)
- return -1;
-
- dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
- p->base = start;
- RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start);
-
- return 0;
-}
-#endif
-
-int
-rte_pci_ioport_map(struct rte_pci_device *dev, int bar,
- struct rte_pci_ioport *p)
-{
- int ret = -1;
-
- switch (dev->kdrv) {
-#ifdef VFIO_PRESENT
- case RTE_KDRV_VFIO:
- if (pci_vfio_is_enabled())
- ret = pci_vfio_ioport_map(dev, bar, p);
- break;
-#endif
- case RTE_KDRV_IGB_UIO:
- ret = pci_uio_ioport_map(dev, bar, p);
- break;
- case RTE_KDRV_UIO_GENERIC:
-#if defined(RTE_ARCH_X86)
- ret = pci_ioport_map(dev, bar, p);
-#else
- ret = pci_uio_ioport_map(dev, bar, p);
-#endif
- break;
- case RTE_KDRV_NONE:
-#if defined(RTE_ARCH_X86)
- ret = pci_ioport_map(dev, bar, p);
-#endif
- break;
- default:
- break;
- }
-
- if (!ret)
- p->dev = dev;
-
- return ret;
-}
-
-void
-rte_pci_ioport_read(struct rte_pci_ioport *p,
- void *data, size_t len, off_t offset)
-{
- switch (p->dev->kdrv) {
-#ifdef VFIO_PRESENT
- case RTE_KDRV_VFIO:
- pci_vfio_ioport_read(p, data, len, offset);
- break;
-#endif
- case RTE_KDRV_IGB_UIO:
- pci_uio_ioport_read(p, data, len, offset);
- break;
- case RTE_KDRV_UIO_GENERIC:
- pci_uio_ioport_read(p, data, len, offset);
- break;
- case RTE_KDRV_NONE:
-#if defined(RTE_ARCH_X86)
- pci_uio_ioport_read(p, data, len, offset);
-#endif
- break;
- default:
- break;
- }
-}
-
-void
-rte_pci_ioport_write(struct rte_pci_ioport *p,
- const void *data, size_t len, off_t offset)
-{
- switch (p->dev->kdrv) {
-#ifdef VFIO_PRESENT
- case RTE_KDRV_VFIO:
- pci_vfio_ioport_write(p, data, len, offset);
- break;
-#endif
- case RTE_KDRV_IGB_UIO:
- pci_uio_ioport_write(p, data, len, offset);
- break;
- case RTE_KDRV_UIO_GENERIC:
- pci_uio_ioport_write(p, data, len, offset);
- break;
- case RTE_KDRV_NONE:
-#if defined(RTE_ARCH_X86)
- pci_uio_ioport_write(p, data, len, offset);
-#endif
- break;
- default:
- break;
- }
-}
-
-int
-rte_pci_ioport_unmap(struct rte_pci_ioport *p)
-{
- int ret = -1;
-
- switch (p->dev->kdrv) {
-#ifdef VFIO_PRESENT
- case RTE_KDRV_VFIO:
- if (pci_vfio_is_enabled())
- ret = pci_vfio_ioport_unmap(p);
- break;
-#endif
- case RTE_KDRV_IGB_UIO:
- ret = pci_uio_ioport_unmap(p);
- break;
- case RTE_KDRV_UIO_GENERIC:
-#if defined(RTE_ARCH_X86)
- ret = 0;
-#else
- ret = pci_uio_ioport_unmap(p);
-#endif
- break;
- case RTE_KDRV_NONE:
-#if defined(RTE_ARCH_X86)
- ret = 0;
-#endif
- break;
- default:
- break;
- }
-
- return ret;
-}
Code Review / deb_dpdk.git / blobdiff