#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_eal_vdrv_register(struct rte_vdev_driver *driver)
+rte_vdev_register(struct rte_vdev_driver *driver)
{
TAILQ_INSERT_TAIL(&vdev_driver_list, driver, next);
- rte_eal_driver_register(&driver->driver);
}
/* unregister a driver */
void
-rte_eal_vdrv_unregister(struct rte_vdev_driver *driver)
+rte_vdev_unregister(struct rte_vdev_driver *driver)
{
- rte_eal_driver_unregister(&driver->driver);
TAILQ_REMOVE(&vdev_driver_list, driver, next);
}
-int
-rte_eal_vdev_init(const char *name, const char *args)
+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;
- TAILQ_FOREACH(driver, &vdev_driver_list, next) {
- /*
- * search a driver prefix in virtual device name.
- * For example, if the driver is pcap PMD, driver->name
- * will be "eth_pcap", but "name" will be "eth_pcapN".
- * So use strncmp to compare.
- */
- if (!strncmp(driver->driver.name, name,
- strlen(driver->driver.name)))
- return driver->init(name, args);
+ 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;
}
- RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
- return -EINVAL;
+ driver = container_of(dev->device.driver, const struct rte_vdev_driver,
+ driver);
+ return driver->remove(dev);
}
int
-rte_eal_vdev_uninit(const char *name)
+rte_vdev_uninit(const char *name)
{
- struct rte_vdev_driver *driver;
+ struct rte_vdev_device *dev;
+ struct rte_devargs *devargs;
+ int ret;
if (name == NULL)
return -EINVAL;
- TAILQ_FOREACH(driver, &vdev_driver_list, next) {
- /*
- * search a driver prefix in virtual device name.
- * For example, if the driver is pcap PMD, driver->name
- * will be "eth_pcap", but "name" will be "eth_pcapN".
- * So use strncmp to compare.
- */
- if (!strncmp(driver->driver.name, name,
- strlen(driver->driver.name)))
- return driver->uninit(name);
+ 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);
}
- RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
- return -EINVAL;
+ 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);