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38 #include <sys/queue.h>
43 #include <rte_common.h>
44 #include <rte_devargs.h>
45 #include <rte_memory.h>
47 /** Double linked list of virtual device drivers. */
48 TAILQ_HEAD(vdev_device_list, rte_vdev_device);
50 static struct vdev_device_list vdev_device_list =
51 TAILQ_HEAD_INITIALIZER(vdev_device_list);
52 struct vdev_driver_list vdev_driver_list =
53 TAILQ_HEAD_INITIALIZER(vdev_driver_list);
55 static void rte_vdev_bus_register(void);
57 /* register a driver */
59 rte_eal_vdrv_register(struct rte_vdev_driver *driver)
61 rte_vdev_bus_register();
63 TAILQ_INSERT_TAIL(&vdev_driver_list, driver, next);
64 rte_eal_driver_register(&driver->driver);
67 /* unregister a driver */
69 rte_eal_vdrv_unregister(struct rte_vdev_driver *driver)
71 rte_eal_driver_unregister(&driver->driver);
72 TAILQ_REMOVE(&vdev_driver_list, driver, next);
76 * Parse "driver" devargs without adding a dependency on rte_kvargs.h
78 static char *parse_driver_arg(const char *args)
83 if (!args || args[0] == '\0')
89 if (strncmp(c, "driver=", 7) == 0) {
108 vdev_probe_all_drivers(struct rte_vdev_device *dev)
112 struct rte_vdev_driver *driver;
115 drv_name = parse_driver_arg(rte_vdev_device_args(dev));
116 name = drv_name ? drv_name : rte_vdev_device_name(dev);
118 RTE_LOG(DEBUG, EAL, "Search driver %s to probe device %s\n", name,
119 rte_vdev_device_name(dev));
121 TAILQ_FOREACH(driver, &vdev_driver_list, next) {
123 * search a driver prefix in virtual device name.
124 * For example, if the driver is pcap PMD, driver->name
125 * will be "net_pcap", but "name" will be "net_pcapN".
126 * So use strncmp to compare.
128 if (!strncmp(driver->driver.name, name,
129 strlen(driver->driver.name))) {
130 dev->device.driver = &driver->driver;
131 ret = driver->probe(dev);
133 dev->device.driver = NULL;
138 /* Give new names precedence over aliases. */
139 TAILQ_FOREACH(driver, &vdev_driver_list, next) {
140 if (driver->driver.alias &&
141 !strncmp(driver->driver.alias, name,
142 strlen(driver->driver.alias))) {
143 dev->device.driver = &driver->driver;
144 ret = driver->probe(dev);
146 dev->device.driver = NULL;
156 static struct rte_vdev_device *
157 find_vdev(const char *name)
159 struct rte_vdev_device *dev;
164 TAILQ_FOREACH(dev, &vdev_device_list, next) {
165 const char *devname = rte_vdev_device_name(dev);
166 if (!strncmp(devname, name, strlen(name)))
173 static struct rte_devargs *
174 alloc_devargs(const char *name, const char *args)
176 struct rte_devargs *devargs;
179 devargs = calloc(1, sizeof(*devargs));
183 devargs->type = RTE_DEVTYPE_VIRTUAL;
185 devargs->args = strdup(args);
187 ret = snprintf(devargs->virt.drv_name,
188 sizeof(devargs->virt.drv_name), "%s", name);
189 if (ret < 0 || ret >= (int)sizeof(devargs->virt.drv_name)) {
199 rte_eal_vdev_init(const char *name, const char *args)
201 struct rte_vdev_device *dev;
202 struct rte_devargs *devargs;
208 dev = find_vdev(name);
212 devargs = alloc_devargs(name, args);
216 dev = calloc(1, sizeof(*dev));
222 dev->device.devargs = devargs;
223 dev->device.numa_node = SOCKET_ID_ANY;
224 dev->device.name = devargs->virt.drv_name;
226 ret = vdev_probe_all_drivers(dev);
229 RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
233 TAILQ_INSERT_TAIL(&devargs_list, devargs, next);
235 rte_eal_device_insert(&dev->device);
236 TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
247 vdev_remove_driver(struct rte_vdev_device *dev)
249 const char *name = rte_vdev_device_name(dev);
250 const struct rte_vdev_driver *driver;
252 if (!dev->device.driver) {
253 RTE_LOG(DEBUG, EAL, "no driver attach to device %s\n", name);
257 driver = container_of(dev->device.driver, const struct rte_vdev_driver,
259 return driver->remove(dev);
263 rte_eal_vdev_uninit(const char *name)
265 struct rte_vdev_device *dev;
266 struct rte_devargs *devargs;
272 dev = find_vdev(name);
276 devargs = dev->device.devargs;
278 ret = vdev_remove_driver(dev);
282 TAILQ_REMOVE(&vdev_device_list, dev, next);
283 rte_eal_device_remove(&dev->device);
285 TAILQ_REMOVE(&devargs_list, devargs, next);
296 struct rte_vdev_device *dev;
297 struct rte_devargs *devargs;
299 /* for virtual devices we scan the devargs_list populated via cmdline */
301 TAILQ_FOREACH(devargs, &devargs_list, next) {
303 if (devargs->type != RTE_DEVTYPE_VIRTUAL)
306 dev = find_vdev(devargs->virt.drv_name);
310 dev = calloc(1, sizeof(*dev));
314 dev->device.devargs = devargs;
315 dev->device.numa_node = SOCKET_ID_ANY;
316 dev->device.name = devargs->virt.drv_name;
318 rte_eal_device_insert(&dev->device);
319 TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
328 struct rte_vdev_device *dev;
331 * Note that the dev_driver_list is populated here
332 * from calls made to rte_eal_driver_register from constructor functions
333 * embedded into PMD modules via the RTE_PMD_REGISTER_VDEV macro
336 /* call the init function for each virtual device */
337 TAILQ_FOREACH(dev, &vdev_device_list, next) {
339 if (dev->device.driver)
342 if (vdev_probe_all_drivers(dev)) {
343 RTE_LOG(ERR, EAL, "failed to initialize %s device\n",
344 rte_vdev_device_name(dev));
352 static struct rte_bus rte_vdev_bus = {
357 RTE_INIT(rte_vdev_bus_register);
359 static void rte_vdev_bus_register(void)
361 static int registered;
367 rte_vdev_bus.name = RTE_STR(virtual);
368 rte_bus_register(&rte_vdev_bus);