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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)
71 if (name == NULL || devargs == NULL) {
72 RTE_LOG(ERR, EAL, "Invalid device or arguments provided\n");
76 bus = rte_bus_find_by_device_name(name);
78 RTE_LOG(ERR, EAL, "Unable to find a bus for the device '%s'\n",
82 if (strcmp(bus->name, "pci") == 0 || strcmp(bus->name, "vdev") == 0)
83 return rte_eal_hotplug_add(bus->name, name, devargs);
86 "Device attach is only supported for PCI and vdev devices.\n");
91 int rte_eal_dev_detach(struct rte_device *dev)
97 RTE_LOG(ERR, EAL, "Invalid device provided.\n");
101 bus = rte_bus_find_by_device(dev);
103 RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n",
108 if (bus->unplug == NULL) {
109 RTE_LOG(ERR, EAL, "Bus function not supported\n");
113 ret = bus->unplug(dev);
115 RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
121 full_dev_name(const char *bus, const char *dev, const char *args)
126 len = snprintf(NULL, 0, "%s:%s,%s", bus, dev, args) + 1;
127 name = calloc(1, len);
129 RTE_LOG(ERR, EAL, "Could not allocate full device name\n");
132 snprintf(name, len, "%s:%s,%s", bus, dev, args);
136 int rte_eal_hotplug_add(const char *busname, const char *devname,
140 struct rte_device *dev;
141 struct rte_devargs *da;
145 bus = rte_bus_find_by_name(busname);
147 RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
151 if (bus->plug == NULL) {
152 RTE_LOG(ERR, EAL, "Function plug not supported by bus (%s)\n",
157 name = full_dev_name(busname, devname, devargs);
161 da = calloc(1, sizeof(*da));
167 ret = rte_eal_devargs_parse(name, da);
171 ret = rte_eal_devargs_insert(da);
179 dev = bus->find_device(NULL, cmp_detached_dev_name, devname);
181 RTE_LOG(ERR, EAL, "Cannot find unplugged device (%s)\n",
187 ret = bus->plug(dev);
189 RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n",
197 if (rte_eal_devargs_remove(busname, devname)) {
206 int rte_eal_hotplug_remove(const char *busname, const char *devname)
209 struct rte_device *dev;
212 bus = rte_bus_find_by_name(busname);
214 RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
218 if (bus->unplug == NULL) {
219 RTE_LOG(ERR, EAL, "Function unplug not supported by bus (%s)\n",
224 dev = bus->find_device(NULL, cmp_dev_name, devname);
226 RTE_LOG(ERR, EAL, "Cannot find plugged device (%s)\n", devname);
230 ret = bus->unplug(dev);
232 RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
234 rte_eal_devargs_remove(busname, devname);