* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <sys/queue.h>
+#include <rte_bus.h>
#include <rte_dev.h>
#include <rte_devargs.h>
#include <rte_debug.h>
-#include <rte_devargs.h>
+#include <rte_log.h>
#include "eal_private.h"
-/** Global list of device drivers. */
-static struct rte_driver_list dev_driver_list =
- TAILQ_HEAD_INITIALIZER(dev_driver_list);
-
-/* register a driver */
-void
-rte_eal_driver_register(struct rte_driver *driver)
+static int cmp_detached_dev_name(const struct rte_device *dev,
+ const void *_name)
{
- TAILQ_INSERT_TAIL(&dev_driver_list, driver, next);
+ const char *name = _name;
+
+ /* skip attached devices */
+ if (dev->driver != NULL)
+ return 1;
+
+ return strcmp(dev->name, name);
}
-/* unregister a driver */
-void
-rte_eal_driver_unregister(struct rte_driver *driver)
+static int cmp_dev_name(const struct rte_device *dev, const void *_name)
{
- TAILQ_REMOVE(&dev_driver_list, driver, next);
+ const char *name = _name;
+
+ return strcmp(dev->name, name);
}
-int
-rte_eal_dev_init(void)
+int rte_eal_dev_attach(const char *name, const char *devargs)
{
- struct rte_devargs *devargs;
- struct rte_driver *driver;
+ struct rte_bus *bus;
+ int ret;
+
+ if (name == NULL || devargs == NULL) {
+ RTE_LOG(ERR, EAL, "Invalid device or arguments provided\n");
+ return -EINVAL;
+ }
+
+ bus = rte_bus_find_by_device_name(name);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Unable to find a bus for the device '%s'\n",
+ name);
+ return -EINVAL;
+ }
+ if (strcmp(bus->name, "pci") == 0)
+ return rte_eal_hotplug_add("pci", name, devargs);
+ if (strcmp(bus->name, "vdev") != 0) {
+ RTE_LOG(ERR, EAL, "Device attach is only supported for PCI and vdev devices.\n");
+ return -ENOTSUP;
+ }
/*
- * Note that the dev_driver_list is populated here
- * from calls made to rte_eal_driver_register from constructor functions
- * embedded into PMD modules via the PMD_REGISTER_DRIVER macro
+ * If we haven't found a bus device the user meant to "hotplug" a
+ * virtual device instead.
*/
+ ret = rte_vdev_init(name, devargs);
+ if (ret)
+ RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n",
+ name);
+ return ret;
+}
+
+int rte_eal_dev_detach(struct rte_device *dev)
+{
+ struct rte_bus *bus;
+ int ret;
+
+ if (dev == NULL) {
+ RTE_LOG(ERR, EAL, "Invalid device provided.\n");
+ return -EINVAL;
+ }
+
+ bus = rte_bus_find_by_device(dev);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n",
+ dev->name);
+ return -EINVAL;
+ }
+
+ if (bus->unplug == NULL) {
+ RTE_LOG(ERR, EAL, "Bus function not supported\n");
+ return -ENOTSUP;
+ }
+
+ ret = bus->unplug(dev);
+ if (ret)
+ RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
+ dev->name);
+ return ret;
+}
+
+static char *
+full_dev_name(const char *bus, const char *dev, const char *args)
+{
+ char *name;
+ size_t len;
- /* call the init function for each virtual device */
- TAILQ_FOREACH(devargs, &devargs_list, next) {
+ len = snprintf(NULL, 0, "%s:%s,%s", bus, dev, args);
+ name = calloc(1, len);
+ if (name == NULL) {
+ RTE_LOG(ERR, EAL, "Could not allocate full device name\n");
+ return NULL;
+ }
+ snprintf(name, len, "%s:%s,%s", bus, dev, args);
+ return name;
+}
+
+int rte_eal_hotplug_add(const char *busname, const char *devname,
+ const char *devargs)
+{
+ struct rte_bus *bus;
+ struct rte_device *dev;
+ struct rte_devargs *da;
+ char *name;
+ int ret;
+
+ bus = rte_bus_find_by_name(busname);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
+ return -ENOENT;
+ }
- if (devargs->type != RTE_DEVTYPE_VIRTUAL)
- continue;
+ if (bus->plug == NULL) {
+ RTE_LOG(ERR, EAL, "Function plug not supported by bus (%s)\n",
+ bus->name);
+ return -ENOTSUP;
+ }
+
+ name = full_dev_name(busname, devname, devargs);
+ if (name == NULL)
+ return -ENOMEM;
+
+ da = calloc(1, sizeof(*da));
+ if (da == NULL) {
+ ret = -ENOMEM;
+ goto err_name;
+ }
+
+ ret = rte_eal_devargs_parse(name, da);
+ if (ret)
+ goto err_devarg;
- TAILQ_FOREACH(driver, &dev_driver_list, next) {
- if (driver->type != PMD_VDEV)
- continue;
+ ret = rte_eal_devargs_insert(da);
+ if (ret)
+ goto err_devarg;
- /* search a driver prefix in virtual device name */
- if (!strncmp(driver->name, devargs->virtual.drv_name,
- strlen(driver->name))) {
- driver->init(devargs->virtual.drv_name,
- devargs->args);
- break;
- }
- }
+ ret = bus->scan();
+ if (ret)
+ goto err_devarg;
- if (driver == NULL) {
- rte_panic("no driver found for %s\n",
- devargs->virtual.drv_name);
- }
+ dev = bus->find_device(NULL, cmp_detached_dev_name, devname);
+ if (dev == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find unplugged device (%s)\n",
+ devname);
+ ret = -ENODEV;
+ goto err_devarg;
}
- /* Once the vdevs are initalized, start calling all the pdev drivers */
- TAILQ_FOREACH(driver, &dev_driver_list, next) {
- if (driver->type != PMD_PDEV)
- continue;
- /* PDEV drivers don't get passed any parameters */
- driver->init(NULL, NULL);
+ ret = bus->plug(dev);
+ if (ret) {
+ RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n",
+ dev->name);
+ goto err_devarg;
}
+ free(name);
return 0;
+
+err_devarg:
+ if (rte_eal_devargs_remove(busname, devname)) {
+ free(da->args);
+ free(da);
+ }
+err_name:
+ free(name);
+ return ret;
+}
+
+int rte_eal_hotplug_remove(const char *busname, const char *devname)
+{
+ struct rte_bus *bus;
+ struct rte_device *dev;
+ int ret;
+
+ bus = rte_bus_find_by_name(busname);
+ if (bus == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
+ return -ENOENT;
+ }
+
+ if (bus->unplug == NULL) {
+ RTE_LOG(ERR, EAL, "Function unplug not supported by bus (%s)\n",
+ bus->name);
+ return -ENOTSUP;
+ }
+
+ dev = bus->find_device(NULL, cmp_dev_name, devname);
+ if (dev == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot find plugged device (%s)\n", devname);
+ return -EINVAL;
+ }
+
+ ret = bus->unplug(dev);
+ if (ret)
+ RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
+ dev->name);
+ rte_eal_devargs_remove(busname, devname);
+ return ret;
}