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38 #include <sys/queue.h>
42 #include <rte_devargs.h>
43 #include <rte_debug.h>
46 #include "eal_private.h"
48 static int cmp_detached_dev_name(const struct rte_device *dev,
51 const char *name = _name;
53 /* skip attached devices */
54 if (dev->driver != NULL)
57 return strcmp(dev->name, name);
60 static int cmp_dev_name(const struct rte_device *dev, const void *_name)
62 const char *name = _name;
64 return strcmp(dev->name, name);
67 int rte_eal_dev_attach(const char *name, const char *devargs)
72 if (name == NULL || devargs == NULL) {
73 RTE_LOG(ERR, EAL, "Invalid device or arguments provided\n");
77 bus = rte_bus_find_by_device_name(name);
79 RTE_LOG(ERR, EAL, "Unable to find a bus for the device '%s'\n",
83 if (strcmp(bus->name, "pci") == 0)
84 return rte_eal_hotplug_add("pci", name, devargs);
85 if (strcmp(bus->name, "vdev") != 0) {
86 RTE_LOG(ERR, EAL, "Device attach is only supported for PCI and vdev devices.\n");
91 * If we haven't found a bus device the user meant to "hotplug" a
92 * virtual device instead.
94 ret = rte_vdev_init(name, devargs);
96 RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n",
101 int rte_eal_dev_detach(struct rte_device *dev)
107 RTE_LOG(ERR, EAL, "Invalid device provided.\n");
111 bus = rte_bus_find_by_device(dev);
113 RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n",
118 if (bus->unplug == NULL) {
119 RTE_LOG(ERR, EAL, "Bus function not supported\n");
123 ret = bus->unplug(dev);
125 RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
131 full_dev_name(const char *bus, const char *dev, const char *args)
136 len = strlen(bus) + 1 +
139 name = calloc(1, len);
141 RTE_LOG(ERR, EAL, "Could not allocate full device name\n");
144 snprintf(name, len, "%s:%s,%s", bus, dev,
149 int rte_eal_hotplug_add(const char *busname, const char *devname,
153 struct rte_device *dev;
154 struct rte_devargs *da;
158 bus = rte_bus_find_by_name(busname);
160 RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
164 if (bus->plug == NULL) {
165 RTE_LOG(ERR, EAL, "Function plug not supported by bus (%s)\n",
170 name = full_dev_name(busname, devname, devargs);
174 da = calloc(1, sizeof(*da));
180 ret = rte_eal_devargs_parse(name, da);
184 ret = rte_eal_devargs_insert(da);
192 dev = bus->find_device(NULL, cmp_detached_dev_name, devname);
194 RTE_LOG(ERR, EAL, "Cannot find unplugged device (%s)\n",
200 ret = bus->plug(dev);
202 RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n",
210 rte_eal_devargs_remove(busname, devname);
216 int rte_eal_hotplug_remove(const char *busname, const char *devname)
219 struct rte_device *dev;
222 bus = rte_bus_find_by_name(busname);
224 RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
228 if (bus->unplug == NULL) {
229 RTE_LOG(ERR, EAL, "Function unplug not supported by bus (%s)\n",
234 dev = bus->find_device(NULL, cmp_dev_name, devname);
236 RTE_LOG(ERR, EAL, "Cannot find plugged device (%s)\n", devname);
240 ret = bus->unplug(dev);
242 RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
244 rte_eal_devargs_remove(busname, devname);