Imported Upstream version 16.11

[deb_dpdk.git] / lib / librte_eal / common / eal_common_vdev.c

diff --git a/lib/librte_eal/common/eal_common_vdev.c b/lib/librte_eal/common/eal_common_vdev.c
new file mode 100644 (file)
index 0000000..0ff2377
--- /dev/null
+++ b/lib/librte_eal/common/eal_common_vdev.c
@@ -0,0 +1,116 @@
+/*-
+ *   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 <sys/queue.h>
+
+#include <rte_vdev.h>
+#include <rte_common.h>
+
+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)
+{
+       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_eal_driver_unregister(&driver->driver);
+       TAILQ_REMOVE(&vdev_driver_list, driver, next);
+}
+
+int
+rte_eal_vdev_init(const char *name, const char *args)
+{
+       struct rte_vdev_driver *driver;
+
+       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 "net_pcap", but "name" will be "net_pcapN".
+                * So use strncmp to compare.
+                */
+               if (!strncmp(driver->driver.name, name,
+                           strlen(driver->driver.name)))
+                       return driver->probe(name, args);
+       }
+
+       /* Give new names precedence over aliases. */
+       TAILQ_FOREACH(driver, &vdev_driver_list, next) {
+               if (driver->driver.alias &&
+                   !strncmp(driver->driver.alias, name,
+                           strlen(driver->driver.alias)))
+                       return driver->probe(name, args);
+       }
+
+       RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
+       return -EINVAL;
+}
+
+int
+rte_eal_vdev_uninit(const char *name)
+{
+       struct rte_vdev_driver *driver;
+
+       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 "net_pcap", but "name" will be "net_pcapN".
+                * So use strncmp to compare.
+                */
+               if (!strncmp(driver->driver.name, name,
+                            strlen(driver->driver.name)))
+                       return driver->remove(name);
+       }
+
+       RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
+       return -EINVAL;
+}