Imported Upstream version 16.04

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

diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
new file mode 100644 (file)
index 0000000..a8a4146
--- /dev/null
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -0,0 +1,152 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2014 6WIND S.A.
+ *   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 Intel Corporation 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 <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <sys/queue.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)
+{
+       TAILQ_INSERT_TAIL(&dev_driver_list, driver, next);
+}
+
+/* unregister a driver */
+void
+rte_eal_driver_unregister(struct rte_driver *driver)
+{
+       TAILQ_REMOVE(&dev_driver_list, driver, next);
+}
+
+int
+rte_eal_vdev_init(const char *name, const char *args)
+{
+       struct rte_driver *driver;
+
+       if (name == NULL)
+               return -EINVAL;
+
+       TAILQ_FOREACH(driver, &dev_driver_list, next) {
+               if (driver->type != PMD_VDEV)
+                       continue;
+
+               /*
+                * 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->name, name, strlen(driver->name)))
+                       return driver->init(name, args);
+       }
+
+       RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
+       return -EINVAL;
+}
+
+int
+rte_eal_dev_init(void)
+{
+       struct rte_devargs *devargs;
+       struct rte_driver *driver;
+
+       /*
+        * 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
+        */
+
+       /* call the init function for each virtual device */
+       TAILQ_FOREACH(devargs, &devargs_list, next) {
+
+               if (devargs->type != RTE_DEVTYPE_VIRTUAL)
+                       continue;
+
+               if (rte_eal_vdev_init(devargs->virt.drv_name,
+                                       devargs->args)) {
+                       RTE_LOG(ERR, EAL, "failed to initialize %s device\n",
+                                       devargs->virt.drv_name);
+                       return -1;
+               }
+       }
+
+       /* 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);
+       }
+       return 0;
+}
+
+int
+rte_eal_vdev_uninit(const char *name)
+{
+       struct rte_driver *driver;
+
+       if (name == NULL)
+               return -EINVAL;
+
+       TAILQ_FOREACH(driver, &dev_driver_list, next) {
+               if (driver->type != PMD_VDEV)
+                       continue;
+
+               /*
+                * 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->name, name, strlen(driver->name)))
+                       return driver->uninit(name);
+       }
+
+       RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
+       return -EINVAL;
+}