+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2016 RehiveTech. 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 RehiveTech 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 <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <sys/queue.h>
-
-#include <rte_eal.h>
-#include <rte_dev.h>
-#include <rte_bus.h>
-#include <rte_vdev.h>
-#include <rte_common.h>
-#include <rte_devargs.h>
-#include <rte_memory.h>
-#include <rte_errno.h>
-
-/* Forward declare to access virtual bus name */
-static struct rte_bus rte_vdev_bus;
-
-/** Double linked list of virtual device drivers. */
-TAILQ_HEAD(vdev_device_list, rte_vdev_device);
-
-static struct vdev_device_list vdev_device_list =
- TAILQ_HEAD_INITIALIZER(vdev_device_list);
-struct vdev_driver_list vdev_driver_list =
- TAILQ_HEAD_INITIALIZER(vdev_driver_list);
-
-/* register a driver */
-void
-rte_vdev_register(struct rte_vdev_driver *driver)
-{
- TAILQ_INSERT_TAIL(&vdev_driver_list, driver, next);
-}
-
-/* unregister a driver */
-void
-rte_vdev_unregister(struct rte_vdev_driver *driver)
-{
- TAILQ_REMOVE(&vdev_driver_list, driver, next);
-}
-
-static int
-vdev_parse(const char *name, void *addr)
-{
- struct rte_vdev_driver **out = addr;
- struct rte_vdev_driver *driver = NULL;
-
- TAILQ_FOREACH(driver, &vdev_driver_list, next) {
- if (strncmp(driver->driver.name, name,
- strlen(driver->driver.name)) == 0)
- break;
- if (driver->driver.alias &&
- strncmp(driver->driver.alias, name,
- strlen(driver->driver.alias)) == 0)
- break;
- }
- if (driver != NULL &&
- addr != NULL)
- *out = driver;
- return driver == NULL;
-}
-
-static int
-vdev_probe_all_drivers(struct rte_vdev_device *dev)
-{
- const char *name;
- struct rte_vdev_driver *driver;
- int ret;
-
- name = rte_vdev_device_name(dev);
-
- RTE_LOG(DEBUG, EAL, "Search driver %s to probe device %s\n", name,
- rte_vdev_device_name(dev));
-
- if (vdev_parse(name, &driver))
- return -1;
- dev->device.driver = &driver->driver;
- ret = driver->probe(dev);
- if (ret)
- dev->device.driver = NULL;
- return ret;
-}
-
-static struct rte_vdev_device *
-find_vdev(const char *name)
-{
- struct rte_vdev_device *dev;
-
- if (!name)
- return NULL;
-
- TAILQ_FOREACH(dev, &vdev_device_list, next) {
- const char *devname = rte_vdev_device_name(dev);
- if (!strncmp(devname, name, strlen(name)))
- return dev;
- }
-
- return NULL;
-}
-
-static struct rte_devargs *
-alloc_devargs(const char *name, const char *args)
-{
- struct rte_devargs *devargs;
- int ret;
-
- devargs = calloc(1, sizeof(*devargs));
- if (!devargs)
- return NULL;
-
- devargs->bus = &rte_vdev_bus;
- if (args)
- devargs->args = strdup(args);
- else
- devargs->args = strdup("");
-
- ret = snprintf(devargs->name, sizeof(devargs->name), "%s", name);
- if (ret < 0 || ret >= (int)sizeof(devargs->name)) {
- free(devargs->args);
- free(devargs);
- return NULL;
- }
-
- return devargs;
-}
-
-int
-rte_vdev_init(const char *name, const char *args)
-{
- struct rte_vdev_device *dev;
- struct rte_devargs *devargs;
- int ret;
-
- if (name == NULL)
- return -EINVAL;
-
- dev = find_vdev(name);
- if (dev)
- return -EEXIST;
-
- devargs = alloc_devargs(name, args);
- if (!devargs)
- return -ENOMEM;
-
- dev = calloc(1, sizeof(*dev));
- if (!dev) {
- ret = -ENOMEM;
- goto fail;
- }
-
- dev->device.devargs = devargs;
- dev->device.numa_node = SOCKET_ID_ANY;
- dev->device.name = devargs->name;
-
- ret = vdev_probe_all_drivers(dev);
- if (ret) {
- if (ret > 0)
- RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
- goto fail;
- }
-
- TAILQ_INSERT_TAIL(&devargs_list, devargs, next);
-
- TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
- return 0;
-
-fail:
- free(devargs->args);
- free(devargs);
- free(dev);
- return ret;
-}
-
-static int
-vdev_remove_driver(struct rte_vdev_device *dev)
-{
- const char *name = rte_vdev_device_name(dev);
- const struct rte_vdev_driver *driver;
-
- if (!dev->device.driver) {
- RTE_LOG(DEBUG, EAL, "no driver attach to device %s\n", name);
- return 1;
- }
-
- driver = container_of(dev->device.driver, const struct rte_vdev_driver,
- driver);
- return driver->remove(dev);
-}
-
-int
-rte_vdev_uninit(const char *name)
-{
- struct rte_vdev_device *dev;
- struct rte_devargs *devargs;
- int ret;
-
- if (name == NULL)
- return -EINVAL;
-
- dev = find_vdev(name);
- if (!dev)
- return -ENOENT;
-
- devargs = dev->device.devargs;
-
- ret = vdev_remove_driver(dev);
- if (ret)
- return ret;
-
- TAILQ_REMOVE(&vdev_device_list, dev, next);
-
- TAILQ_REMOVE(&devargs_list, devargs, next);
-
- free(devargs->args);
- free(devargs);
- free(dev);
- return 0;
-}
-
-static int
-vdev_scan(void)
-{
- struct rte_vdev_device *dev;
- struct rte_devargs *devargs;
-
- /* for virtual devices we scan the devargs_list populated via cmdline */
- TAILQ_FOREACH(devargs, &devargs_list, next) {
-
- if (devargs->bus != &rte_vdev_bus)
- continue;
-
- dev = find_vdev(devargs->name);
- if (dev)
- continue;
-
- dev = calloc(1, sizeof(*dev));
- if (!dev)
- return -1;
-
- dev->device.devargs = devargs;
- dev->device.numa_node = SOCKET_ID_ANY;
- dev->device.name = devargs->name;
-
- TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
- }
-
- return 0;
-}
-
-static int
-vdev_probe(void)
-{
- struct rte_vdev_device *dev;
-
- /* call the init function for each virtual device */
- TAILQ_FOREACH(dev, &vdev_device_list, next) {
-
- if (dev->device.driver)
- continue;
-
- if (vdev_probe_all_drivers(dev)) {
- RTE_LOG(ERR, EAL, "failed to initialize %s device\n",
- rte_vdev_device_name(dev));
- return -1;
- }
- }
-
- return 0;
-}
-
-static struct rte_device *
-vdev_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
- const void *data)
-{
- struct rte_vdev_device *dev;
-
- TAILQ_FOREACH(dev, &vdev_device_list, next) {
- if (start && &dev->device == start) {
- start = NULL;
- continue;
- }
- if (cmp(&dev->device, data) == 0)
- return &dev->device;
- }
- return NULL;
-}
-
-static int
-vdev_plug(struct rte_device *dev)
-{
- return vdev_probe_all_drivers(RTE_DEV_TO_VDEV(dev));
-}
-
-static int
-vdev_unplug(struct rte_device *dev)
-{
- return rte_vdev_uninit(dev->name);
-}
-
-static struct rte_bus rte_vdev_bus = {
- .scan = vdev_scan,
- .probe = vdev_probe,
- .find_device = vdev_find_device,
- .plug = vdev_plug,
- .unplug = vdev_unplug,
- .parse = vdev_parse,
-};
-
-RTE_REGISTER_BUS(vdev, rte_vdev_bus);
git.droids-corp.org / dpdk.git / blobdiff