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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation.
* Copyright(c) 2014 6WIND S.A.
*/
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <sys/queue.h>
#include <rte_compat.h>
#include <rte_bus.h>
#include <rte_dev.h>
#include <rte_devargs.h>
#include <rte_debug.h>
#include <rte_log.h>
#include "eal_private.h"
static int cmp_detached_dev_name(const struct rte_device *dev,
const void *_name)
{
const char *name = _name;
/* skip attached devices */
if (dev->driver != NULL)
return 1;
return strcmp(dev->name, name);
}
static int cmp_dev_name(const struct rte_device *dev, const void *_name)
{
const char *name = _name;
return strcmp(dev->name, name);
}
int rte_eal_dev_attach(const char *name, const char *devargs)
{
struct rte_bus *bus;
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 || strcmp(bus->name, "vdev") == 0)
return rte_eal_hotplug_add(bus->name, name, devargs);
RTE_LOG(ERR, EAL,
"Device attach is only supported for PCI and vdev devices.\n");
return -ENOTSUP;
}
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;
len = snprintf(NULL, 0, "%s:%s,%s", bus, dev, args) + 1;
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_experimental 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 (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;
ret = rte_eal_devargs_insert(da);
if (ret)
goto err_devarg;
ret = bus->scan();
if (ret)
goto err_devarg;
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;
}
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_experimental
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;
}
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