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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_vdev_register(struct rte_vdev_driver *driver)
61 rte_vdev_bus_register();
63 TAILQ_INSERT_TAIL(&vdev_driver_list, driver, next);
66 /* unregister a driver */
68 rte_vdev_unregister(struct rte_vdev_driver *driver)
70 TAILQ_REMOVE(&vdev_driver_list, driver, next);
74 * Parse "driver" devargs without adding a dependency on rte_kvargs.h
76 static char *parse_driver_arg(const char *args)
81 if (!args || args[0] == '\0')
87 if (strncmp(c, "driver=", 7) == 0) {
106 vdev_probe_all_drivers(struct rte_vdev_device *dev)
110 struct rte_vdev_driver *driver;
113 drv_name = parse_driver_arg(rte_vdev_device_args(dev));
114 name = drv_name ? drv_name : rte_vdev_device_name(dev);
116 RTE_LOG(DEBUG, EAL, "Search driver %s to probe device %s\n", name,
117 rte_vdev_device_name(dev));
119 TAILQ_FOREACH(driver, &vdev_driver_list, next) {
121 * search a driver prefix in virtual device name.
122 * For example, if the driver is pcap PMD, driver->name
123 * will be "net_pcap", but "name" will be "net_pcapN".
124 * So use strncmp to compare.
126 if (!strncmp(driver->driver.name, name,
127 strlen(driver->driver.name))) {
128 dev->device.driver = &driver->driver;
129 ret = driver->probe(dev);
131 dev->device.driver = NULL;
136 /* Give new names precedence over aliases. */
137 TAILQ_FOREACH(driver, &vdev_driver_list, next) {
138 if (driver->driver.alias &&
139 !strncmp(driver->driver.alias, name,
140 strlen(driver->driver.alias))) {
141 dev->device.driver = &driver->driver;
142 ret = driver->probe(dev);
144 dev->device.driver = NULL;
154 static struct rte_vdev_device *
155 find_vdev(const char *name)
157 struct rte_vdev_device *dev;
162 TAILQ_FOREACH(dev, &vdev_device_list, next) {
163 const char *devname = rte_vdev_device_name(dev);
164 if (!strncmp(devname, name, strlen(name)))
171 static struct rte_devargs *
172 alloc_devargs(const char *name, const char *args)
174 struct rte_devargs *devargs;
177 devargs = calloc(1, sizeof(*devargs));
181 devargs->type = RTE_DEVTYPE_VIRTUAL;
183 devargs->args = strdup(args);
185 ret = snprintf(devargs->virt.drv_name,
186 sizeof(devargs->virt.drv_name), "%s", name);
187 if (ret < 0 || ret >= (int)sizeof(devargs->virt.drv_name)) {
197 rte_vdev_init(const char *name, const char *args)
199 struct rte_vdev_device *dev;
200 struct rte_devargs *devargs;
206 dev = find_vdev(name);
210 devargs = alloc_devargs(name, args);
214 dev = calloc(1, sizeof(*dev));
220 dev->device.devargs = devargs;
221 dev->device.numa_node = SOCKET_ID_ANY;
222 dev->device.name = devargs->virt.drv_name;
224 ret = vdev_probe_all_drivers(dev);
227 RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
231 TAILQ_INSERT_TAIL(&devargs_list, devargs, next);
233 TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
244 vdev_remove_driver(struct rte_vdev_device *dev)
246 const char *name = rte_vdev_device_name(dev);
247 const struct rte_vdev_driver *driver;
249 if (!dev->device.driver) {
250 RTE_LOG(DEBUG, EAL, "no driver attach to device %s\n", name);
254 driver = container_of(dev->device.driver, const struct rte_vdev_driver,
256 return driver->remove(dev);
260 rte_vdev_uninit(const char *name)
262 struct rte_vdev_device *dev;
263 struct rte_devargs *devargs;
269 dev = find_vdev(name);
273 devargs = dev->device.devargs;
275 ret = vdev_remove_driver(dev);
279 TAILQ_REMOVE(&vdev_device_list, dev, next);
281 TAILQ_REMOVE(&devargs_list, devargs, next);
292 struct rte_vdev_device *dev;
293 struct rte_devargs *devargs;
295 /* for virtual devices we scan the devargs_list populated via cmdline */
297 TAILQ_FOREACH(devargs, &devargs_list, next) {
299 if (devargs->type != RTE_DEVTYPE_VIRTUAL)
302 dev = find_vdev(devargs->virt.drv_name);
306 dev = calloc(1, sizeof(*dev));
310 dev->device.devargs = devargs;
311 dev->device.numa_node = SOCKET_ID_ANY;
312 dev->device.name = devargs->virt.drv_name;
314 TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
323 struct rte_vdev_device *dev;
325 /* call the init function for each virtual device */
326 TAILQ_FOREACH(dev, &vdev_device_list, next) {
328 if (dev->device.driver)
331 if (vdev_probe_all_drivers(dev)) {
332 RTE_LOG(ERR, EAL, "failed to initialize %s device\n",
333 rte_vdev_device_name(dev));
341 static struct rte_bus rte_vdev_bus = {
346 RTE_INIT(rte_vdev_bus_register);
348 static void rte_vdev_bus_register(void)
350 static int registered;
356 rte_vdev_bus.name = RTE_STR(virtual);
357 rte_bus_register(&rte_vdev_bus);