+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * Copyright 2013-2014 6WIND S.A.
- * 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 <inttypes.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <sys/queue.h>
-#include <sys/mman.h>
-
-#include <rte_errno.h>
-#include <rte_interrupts.h>
-#include <rte_log.h>
-#include <rte_bus.h>
-#include <rte_pci.h>
-#include <rte_per_lcore.h>
-#include <rte_memory.h>
-#include <rte_memzone.h>
-#include <rte_eal.h>
-#include <rte_string_fns.h>
-#include <rte_common.h>
-#include <rte_devargs.h>
-
-#include "eal_private.h"
-
-extern struct rte_pci_bus rte_pci_bus;
-
-#define SYSFS_PCI_DEVICES "/sys/bus/pci/devices"
-
-const char *pci_get_sysfs_path(void)
-{
- const char *path = NULL;
-
- path = getenv("SYSFS_PCI_DEVICES");
- if (path == NULL)
- return SYSFS_PCI_DEVICES;
-
- return path;
-}
-
-static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
-{
- struct rte_devargs *devargs;
- struct rte_pci_addr addr;
- struct rte_bus *pbus;
-
- pbus = rte_bus_find_by_name("pci");
- TAILQ_FOREACH(devargs, &devargs_list, next) {
- if (devargs->bus != pbus)
- continue;
- devargs->bus->parse(devargs->name, &addr);
- if (!rte_eal_compare_pci_addr(&dev->addr, &addr))
- return devargs;
- }
- return NULL;
-}
-
-void
-pci_name_set(struct rte_pci_device *dev)
-{
- struct rte_devargs *devargs;
-
- /* Each device has its internal, canonical name set. */
- rte_pci_device_name(&dev->addr,
- dev->name, sizeof(dev->name));
- devargs = pci_devargs_lookup(dev);
- dev->device.devargs = devargs;
- /* In blacklist mode, if the device is not blacklisted, no
- * rte_devargs exists for it.
- */
- if (devargs != NULL)
- /* If an rte_devargs exists, the generic rte_device uses the
- * given name as its namea
- */
- dev->device.name = dev->device.devargs->name;
- else
- /* Otherwise, it uses the internal, canonical form. */
- dev->device.name = dev->name;
-}
-
-/* map a particular resource from a file */
-void *
-pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
- int additional_flags)
-{
- void *mapaddr;
-
- /* Map the PCI memory resource of device */
- mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
- MAP_SHARED | additional_flags, fd, offset);
- if (mapaddr == MAP_FAILED) {
- RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
- __func__, fd, requested_addr,
- (unsigned long)size, (unsigned long)offset,
- strerror(errno), mapaddr);
- } else
- RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
-
- return mapaddr;
-}
-
-/* unmap a particular resource */
-void
-pci_unmap_resource(void *requested_addr, size_t size)
-{
- if (requested_addr == NULL)
- return;
-
- /* Unmap the PCI memory resource of device */
- if (munmap(requested_addr, size)) {
- RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
- __func__, requested_addr, (unsigned long)size,
- strerror(errno));
- } else
- RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
- requested_addr);
-}
-
-/*
- * Match the PCI Driver and Device using the ID Table
- *
- * @param pci_drv
- * PCI driver from which ID table would be extracted
- * @param pci_dev
- * PCI device to match against the driver
- * @return
- * 1 for successful match
- * 0 for unsuccessful match
- */
-static int
-rte_pci_match(const struct rte_pci_driver *pci_drv,
- const struct rte_pci_device *pci_dev)
-{
- const struct rte_pci_id *id_table;
-
- for (id_table = pci_drv->id_table; id_table->vendor_id != 0;
- id_table++) {
- /* check if device's identifiers match the driver's ones */
- if (id_table->vendor_id != pci_dev->id.vendor_id &&
- id_table->vendor_id != PCI_ANY_ID)
- continue;
- if (id_table->device_id != pci_dev->id.device_id &&
- id_table->device_id != PCI_ANY_ID)
- continue;
- if (id_table->subsystem_vendor_id !=
- pci_dev->id.subsystem_vendor_id &&
- id_table->subsystem_vendor_id != PCI_ANY_ID)
- continue;
- if (id_table->subsystem_device_id !=
- pci_dev->id.subsystem_device_id &&
- id_table->subsystem_device_id != PCI_ANY_ID)
- continue;
- if (id_table->class_id != pci_dev->id.class_id &&
- id_table->class_id != RTE_CLASS_ANY_ID)
- continue;
-
- return 1;
- }
-
- return 0;
-}
-
-/*
- * If vendor/device ID match, call the probe() function of the
- * driver.
- */
-static int
-rte_pci_probe_one_driver(struct rte_pci_driver *dr,
- struct rte_pci_device *dev)
-{
- int ret;
- struct rte_pci_addr *loc;
-
- if ((dr == NULL) || (dev == NULL))
- return -EINVAL;
-
- loc = &dev->addr;
-
- /* The device is not blacklisted; Check if driver supports it */
- if (!rte_pci_match(dr, dev))
- /* Match of device and driver failed */
- return 1;
-
- RTE_LOG(INFO, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
- loc->domain, loc->bus, loc->devid, loc->function,
- dev->device.numa_node);
-
- /* no initialization when blacklisted, return without error */
- if (dev->device.devargs != NULL &&
- dev->device.devargs->policy ==
- RTE_DEV_BLACKLISTED) {
- RTE_LOG(INFO, EAL, " Device is blacklisted, not"
- " initializing\n");
- return 1;
- }
-
- if (dev->device.numa_node < 0) {
- RTE_LOG(WARNING, EAL, " Invalid NUMA socket, default to 0\n");
- dev->device.numa_node = 0;
- }
-
- RTE_LOG(INFO, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
- dev->id.device_id, dr->driver.name);
-
- if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
- /* map resources for devices that use igb_uio */
- ret = rte_pci_map_device(dev);
- if (ret != 0)
- return ret;
- }
-
- /* reference driver structure */
- dev->driver = dr;
- dev->device.driver = &dr->driver;
-
- /* call the driver probe() function */
- ret = dr->probe(dr, dev);
- if (ret) {
- dev->driver = NULL;
- dev->device.driver = NULL;
- if ((dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) &&
- /* Don't unmap if device is unsupported and
- * driver needs mapped resources.
- */
- !(ret > 0 &&
- (dr->drv_flags & RTE_PCI_DRV_KEEP_MAPPED_RES)))
- rte_pci_unmap_device(dev);
- }
-
- return ret;
-}
-
-/*
- * If vendor/device ID match, call the remove() function of the
- * driver.
- */
-static int
-rte_pci_detach_dev(struct rte_pci_device *dev)
-{
- struct rte_pci_addr *loc;
- struct rte_pci_driver *dr;
-
- if (dev == NULL)
- return -EINVAL;
-
- dr = dev->driver;
- loc = &dev->addr;
-
- RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
- loc->domain, loc->bus, loc->devid,
- loc->function, dev->device.numa_node);
-
- RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id,
- dev->id.device_id, dr->driver.name);
-
- if (dr->remove && (dr->remove(dev) < 0))
- return -1; /* negative value is an error */
-
- /* clear driver structure */
- dev->driver = NULL;
-
- if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
- /* unmap resources for devices that use igb_uio */
- rte_pci_unmap_device(dev);
-
- return 0;
-}
-
-/*
- * If vendor/device ID match, call the probe() function of all
- * registered driver for the given device. Return -1 if initialization
- * failed, return 1 if no driver is found for this device.
- */
-static int
-pci_probe_all_drivers(struct rte_pci_device *dev)
-{
- struct rte_pci_driver *dr = NULL;
- int rc = 0;
-
- if (dev == NULL)
- return -1;
-
- /* Check if a driver is already loaded */
- if (dev->driver != NULL)
- return 0;
-
- FOREACH_DRIVER_ON_PCIBUS(dr) {
- rc = rte_pci_probe_one_driver(dr, dev);
- if (rc < 0)
- /* negative value is an error */
- return -1;
- if (rc > 0)
- /* positive value means driver doesn't support it */
- continue;
- return 0;
- }
- return 1;
-}
-
-/*
- * Find the pci device specified by pci address, then invoke probe function of
- * the driver of the device.
- */
-int
-rte_pci_probe_one(const struct rte_pci_addr *addr)
-{
- struct rte_pci_device *dev = NULL;
-
- int ret = 0;
-
- if (addr == NULL)
- return -1;
-
- /* update current pci device in global list, kernel bindings might have
- * changed since last time we looked at it.
- */
- if (pci_update_device(addr) < 0)
- goto err_return;
-
- FOREACH_DEVICE_ON_PCIBUS(dev) {
- if (rte_eal_compare_pci_addr(&dev->addr, addr))
- continue;
-
- ret = pci_probe_all_drivers(dev);
- if (ret)
- goto err_return;
- return 0;
- }
- return -1;
-
-err_return:
- RTE_LOG(WARNING, EAL,
- "Requested device " PCI_PRI_FMT " cannot be used\n",
- addr->domain, addr->bus, addr->devid, addr->function);
- return -1;
-}
-
-/*
- * Detach device specified by its pci address.
- */
-int
-rte_pci_detach(const struct rte_pci_addr *addr)
-{
- struct rte_pci_device *dev = NULL;
- int ret = 0;
-
- if (addr == NULL)
- return -1;
-
- FOREACH_DEVICE_ON_PCIBUS(dev) {
- if (rte_eal_compare_pci_addr(&dev->addr, addr))
- continue;
-
- ret = rte_pci_detach_dev(dev);
- if (ret < 0)
- /* negative value is an error */
- goto err_return;
- if (ret > 0)
- /* positive value means driver doesn't support it */
- continue;
-
- rte_pci_remove_device(dev);
- free(dev);
- return 0;
- }
- return -1;
-
-err_return:
- RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
- " cannot be used\n", dev->addr.domain, dev->addr.bus,
- dev->addr.devid, dev->addr.function);
- return -1;
-}
-
-/*
- * Scan the content of the PCI bus, and call the probe() function for
- * all registered drivers that have a matching entry in its id_table
- * for discovered devices.
- */
-int
-rte_pci_probe(void)
-{
- struct rte_pci_device *dev = NULL;
- size_t probed = 0, failed = 0;
- struct rte_devargs *devargs;
- int probe_all = 0;
- int ret = 0;
-
- if (rte_pci_bus.bus.conf.scan_mode != RTE_BUS_SCAN_WHITELIST)
- probe_all = 1;
-
- FOREACH_DEVICE_ON_PCIBUS(dev) {
- probed++;
-
- devargs = dev->device.devargs;
- /* probe all or only whitelisted devices */
- if (probe_all)
- ret = pci_probe_all_drivers(dev);
- else if (devargs != NULL &&
- devargs->policy == RTE_DEV_WHITELISTED)
- ret = pci_probe_all_drivers(dev);
- if (ret < 0) {
- RTE_LOG(ERR, EAL, "Requested device " PCI_PRI_FMT
- " cannot be used\n", dev->addr.domain, dev->addr.bus,
- dev->addr.devid, dev->addr.function);
- rte_errno = errno;
- failed++;
- ret = 0;
- }
- }
-
- return (probed && probed == failed) ? -1 : 0;
-}
-
-/* dump one device */
-static int
-pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
-{
- int i;
-
- fprintf(f, PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
- dev->addr.devid, dev->addr.function);
- fprintf(f, " - vendor:%x device:%x\n", dev->id.vendor_id,
- dev->id.device_id);
-
- for (i = 0; i != sizeof(dev->mem_resource) /
- sizeof(dev->mem_resource[0]); i++) {
- fprintf(f, " %16.16"PRIx64" %16.16"PRIx64"\n",
- dev->mem_resource[i].phys_addr,
- dev->mem_resource[i].len);
- }
- return 0;
-}
-
-/* dump devices on the bus */
-void
-rte_pci_dump(FILE *f)
-{
- struct rte_pci_device *dev = NULL;
-
- FOREACH_DEVICE_ON_PCIBUS(dev) {
- pci_dump_one_device(f, dev);
- }
-}
-
-static int
-pci_parse(const char *name, void *addr)
-{
- struct rte_pci_addr *out = addr;
- struct rte_pci_addr pci_addr;
- bool parse;
-
- parse = (eal_parse_pci_BDF(name, &pci_addr) == 0 ||
- eal_parse_pci_DomBDF(name, &pci_addr) == 0);
- if (parse && addr != NULL)
- *out = pci_addr;
- return parse == false;
-}
-
-/* register a driver */
-void
-rte_pci_register(struct rte_pci_driver *driver)
-{
- TAILQ_INSERT_TAIL(&rte_pci_bus.driver_list, driver, next);
- driver->bus = &rte_pci_bus;
-}
-
-/* unregister a driver */
-void
-rte_pci_unregister(struct rte_pci_driver *driver)
-{
- TAILQ_REMOVE(&rte_pci_bus.driver_list, driver, next);
- driver->bus = NULL;
-}
-
-/* Add a device to PCI bus */
-void
-rte_pci_add_device(struct rte_pci_device *pci_dev)
-{
- TAILQ_INSERT_TAIL(&rte_pci_bus.device_list, pci_dev, next);
-}
-
-/* Insert a device into a predefined position in PCI bus */
-void
-rte_pci_insert_device(struct rte_pci_device *exist_pci_dev,
- struct rte_pci_device *new_pci_dev)
-{
- TAILQ_INSERT_BEFORE(exist_pci_dev, new_pci_dev, next);
-}
-
-/* Remove a device from PCI bus */
-void
-rte_pci_remove_device(struct rte_pci_device *pci_dev)
-{
- TAILQ_REMOVE(&rte_pci_bus.device_list, pci_dev, next);
-}
-
-static struct rte_device *
-pci_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
- const void *data)
-{
- struct rte_pci_device *dev;
-
- FOREACH_DEVICE_ON_PCIBUS(dev) {
- if (start && &dev->device == start) {
- start = NULL; /* starting point found */
- continue;
- }
- if (cmp(&dev->device, data) == 0)
- return &dev->device;
- }
-
- return NULL;
-}
-
-static int
-pci_plug(struct rte_device *dev)
-{
- return pci_probe_all_drivers(RTE_DEV_TO_PCI(dev));
-}
-
-static int
-pci_unplug(struct rte_device *dev)
-{
- struct rte_pci_device *pdev;
- int ret;
-
- pdev = RTE_DEV_TO_PCI(dev);
- ret = rte_pci_detach_dev(pdev);
- rte_pci_remove_device(pdev);
- free(pdev);
- return ret;
-}
-
-struct rte_pci_bus rte_pci_bus = {
- .bus = {
- .scan = rte_pci_scan,
- .probe = rte_pci_probe,
- .find_device = pci_find_device,
- .plug = pci_plug,
- .unplug = pci_unplug,
- .parse = pci_parse,
- },
- .device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
- .driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),
-};
-
-RTE_REGISTER_BUS(pci, rte_pci_bus.bus);
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