/*-
* BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * Copyright(c) 2014 6WIND S.A.
- * All rights reserved.
- *
+ *
+ * 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 Intel Corporation nor the names of its
+ * * 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
#include <string.h>
#include <inttypes.h>
-#include <rte_string_fns.h>
-#ifdef RTE_LIBRTE_PMD_RING
-#include <rte_eth_ring.h>
-#endif
-#ifdef RTE_LIBRTE_PMD_PCAP
-#include <rte_eth_pcap.h>
-#endif
-#ifdef RTE_LIBRTE_PMD_XENVIRT
-#include <rte_eth_xenvirt.h>
-#endif
-#include <rte_debug.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <sys/queue.h>
+
+#include <rte_eal.h>
+#include <rte_bus.h>
+#include <rte_vdev.h>
+#include <rte_common.h>
#include <rte_devargs.h>
-#include "eal_private.h"
+#include <rte_memory.h>
-struct device_init {
- const char *dev_prefix;
- int (*init_fn)(const char*, const char *);
-};
+/** Double linked list of virtual device drivers. */
+TAILQ_HEAD(vdev_device_list, rte_vdev_device);
+
+static struct vdev_device_list vdev_device_list =
+ TAILQ_HEAD_INITIALIZER(vdev_device_list);
+struct vdev_driver_list vdev_driver_list =
+ TAILQ_HEAD_INITIALIZER(vdev_driver_list);
+
+static void rte_vdev_bus_register(void);
+
+/* register a driver */
+void
+rte_eal_vdrv_register(struct rte_vdev_driver *driver)
+{
+ rte_vdev_bus_register();
+
+ 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);
+}
+
+static int
+vdev_probe_all_drivers(struct rte_vdev_device *dev)
+{
+ const char *name = rte_vdev_device_name(dev);
+ struct rte_vdev_driver *driver;
+ int ret;
-#define NUM_DEV_TYPES (sizeof(dev_types)/sizeof(dev_types[0]))
-struct device_init dev_types[] = {
-#ifdef RTE_LIBRTE_PMD_RING
- {
- .dev_prefix = RTE_ETH_RING_PARAM_NAME,
- .init_fn = rte_pmd_ring_init
- },
-#endif
-#ifdef RTE_LIBRTE_PMD_PCAP
- {
- .dev_prefix = RTE_ETH_PCAP_PARAM_NAME,
- .init_fn = rte_pmd_pcap_init
- },
-#endif
-#ifdef RTE_LIBRTE_PMD_XENVIRT
- {
- .dev_prefix = RTE_ETH_XENVIRT_PARAM_NAME,
- .init_fn = rte_pmd_xenvirt_init
- },
-#endif
- {
- .dev_prefix = "-nodev-",
- .init_fn = NULL
+ 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))) {
+ dev->device.driver = &driver->driver;
+ ret = driver->probe(dev);
+ if (ret)
+ dev->device.driver = NULL;
+ return ret;
}
-};
+ }
+
+ /* 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))) {
+ dev->device.driver = &driver->driver;
+ ret = driver->probe(dev);
+ if (ret)
+ dev->device.driver = NULL;
+ return ret;
+ }
+ }
+
+ return 1;
+}
+
+static struct rte_vdev_device *
+find_vdev(const char *name)
+{
+ struct rte_vdev_device *dev;
+
+ if (!name)
+ return NULL;
+
+ TAILQ_FOREACH(dev, &vdev_device_list, next) {
+ const char *devname = rte_vdev_device_name(dev);
+ if (!strncmp(devname, name, strlen(name)))
+ return dev;
+ }
+
+ return NULL;
+}
+
+static struct rte_devargs *
+alloc_devargs(const char *name, const char *args)
+{
+ struct rte_devargs *devargs;
+ int ret;
+
+ devargs = calloc(1, sizeof(*devargs));
+ if (!devargs)
+ return NULL;
+
+ devargs->type = RTE_DEVTYPE_VIRTUAL;
+ if (args)
+ devargs->args = strdup(args);
+
+ ret = snprintf(devargs->virt.drv_name,
+ sizeof(devargs->virt.drv_name), "%s", name);
+ if (ret < 0 || ret >= (int)sizeof(devargs->virt.drv_name)) {
+ free(devargs->args);
+ free(devargs);
+ return NULL;
+ }
+
+ return devargs;
+}
int
-rte_eal_vdev_init(void)
+rte_eal_vdev_init(const char *name, const char *args)
{
+ struct rte_vdev_device *dev;
struct rte_devargs *devargs;
- uint8_t i;
+ int ret;
+
+ if (name == NULL)
+ return -EINVAL;
+
+ dev = find_vdev(name);
+ if (dev)
+ return -EEXIST;
+
+ devargs = alloc_devargs(name, args);
+ if (!devargs)
+ return -ENOMEM;
+
+ dev = calloc(1, sizeof(*dev));
+ if (!dev) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ dev->device.devargs = devargs;
+ dev->device.numa_node = SOCKET_ID_ANY;
+ dev->device.name = devargs->virt.drv_name;
+
+ ret = vdev_probe_all_drivers(dev);
+ if (ret) {
+ if (ret > 0)
+ RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
+ goto fail;
+ }
+
+ TAILQ_INSERT_TAIL(&devargs_list, devargs, next);
+
+ rte_eal_device_insert(&dev->device);
+ TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
+ return 0;
+
+fail:
+ free(devargs->args);
+ free(devargs);
+ free(dev);
+ return ret;
+}
+
+static int
+vdev_remove_driver(struct rte_vdev_device *dev)
+{
+ const char *name = rte_vdev_device_name(dev);
+ const struct rte_vdev_driver *driver;
+
+ if (!dev->device.driver) {
+ RTE_LOG(DEBUG, EAL, "no driver attach to device %s\n", name);
+ return 1;
+ }
+
+ driver = container_of(dev->device.driver, const struct rte_vdev_driver,
+ driver);
+ return driver->remove(dev);
+}
+
+int
+rte_eal_vdev_uninit(const char *name)
+{
+ struct rte_vdev_device *dev;
+ struct rte_devargs *devargs;
+ int ret;
+
+ if (name == NULL)
+ return -EINVAL;
+
+ dev = find_vdev(name);
+ if (!dev)
+ return -ENOENT;
+
+ devargs = dev->device.devargs;
+
+ ret = vdev_remove_driver(dev);
+ if (ret)
+ return ret;
+
+ TAILQ_REMOVE(&vdev_device_list, dev, next);
+ rte_eal_device_remove(&dev->device);
+
+ TAILQ_REMOVE(&devargs_list, devargs, next);
+
+ free(devargs->args);
+ free(devargs);
+ free(dev);
+ return 0;
+}
+
+static int
+vdev_scan(void)
+{
+ struct rte_vdev_device *dev;
+ struct rte_devargs *devargs;
+
+ /* for virtual devices we scan the devargs_list populated via cmdline */
- /* call the init function for each virtual device */
TAILQ_FOREACH(devargs, &devargs_list, next) {
if (devargs->type != RTE_DEVTYPE_VIRTUAL)
continue;
- for (i = 0; i < NUM_DEV_TYPES; i++) {
- /* search a driver prefix in virtual device name */
- if (!strncmp(dev_types[i].dev_prefix,
- devargs->virtual.drv_name,
- sizeof(dev_types[i].dev_prefix) - 1)) {
- dev_types[i].init_fn(devargs->virtual.drv_name,
- devargs->args);
- break;
- }
- }
+ dev = find_vdev(devargs->virt.drv_name);
+ if (dev)
+ continue;
+
+ dev = calloc(1, sizeof(*dev));
+ if (!dev)
+ return -1;
+
+ dev->device.devargs = devargs;
+ dev->device.numa_node = SOCKET_ID_ANY;
+ dev->device.name = devargs->virt.drv_name;
+
+ rte_eal_device_insert(&dev->device);
+ TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
+ }
+
+ return 0;
+}
+
+static int
+vdev_probe(void)
+{
+ struct rte_vdev_device *dev;
+
+ /*
+ * 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 RTE_PMD_REGISTER_VDEV macro
+ */
+
+ /* call the init function for each virtual device */
+ TAILQ_FOREACH(dev, &vdev_device_list, next) {
+
+ if (dev->device.driver)
+ continue;
- if (i == NUM_DEV_TYPES) {
- rte_panic("no driver found for %s\n",
- devargs->virtual.drv_name);
+ if (vdev_probe_all_drivers(dev)) {
+ RTE_LOG(ERR, EAL, "failed to initialize %s device\n",
+ rte_vdev_device_name(dev));
+ return -1;
}
}
+
return 0;
}
+
+static struct rte_bus rte_vdev_bus = {
+ .scan = vdev_scan,
+ .probe = vdev_probe,
+};
+
+RTE_INIT(rte_vdev_bus_register);
+
+static void rte_vdev_bus_register(void)
+{
+ static int registered;
+
+ if (registered)
+ return;
+
+ registered = 1;
+ rte_vdev_bus.name = RTE_STR(virtual);
+ rte_bus_register(&rte_vdev_bus);
+}
git.droids-corp.org / dpdk.git / blobdiff