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38 #include <sys/queue.h>
40 #include <rte_compat.h>
43 #include <rte_devargs.h>
44 #include <rte_debug.h>
47 #include "eal_private.h"
49 static int cmp_detached_dev_name(const struct rte_device *dev,
52 const char *name = _name;
54 /* skip attached devices */
55 if (dev->driver != NULL)
58 return strcmp(dev->name, name);
61 static int cmp_dev_name(const struct rte_device *dev, const void *_name)
63 const char *name = _name;
65 return strcmp(dev->name, name);
68 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 || strcmp(bus->name, "vdev") == 0)
84 return rte_eal_hotplug_add(bus->name, name, devargs);
87 "Device attach is only supported for PCI and vdev devices.\n");
92 int rte_eal_dev_detach(struct rte_device *dev)
98 RTE_LOG(ERR, EAL, "Invalid device provided.\n");
102 bus = rte_bus_find_by_device(dev);
104 RTE_LOG(ERR, EAL, "Cannot find bus for device (%s)\n",
109 if (bus->unplug == NULL) {
110 RTE_LOG(ERR, EAL, "Bus function not supported\n");
114 ret = bus->unplug(dev);
116 RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
122 full_dev_name(const char *bus, const char *dev, const char *args)
127 len = snprintf(NULL, 0, "%s:%s,%s", bus, dev, args) + 1;
128 name = calloc(1, len);
130 RTE_LOG(ERR, EAL, "Could not allocate full device name\n");
133 snprintf(name, len, "%s:%s,%s", bus, dev, args);
137 int __rte_experimental rte_eal_hotplug_add(const char *busname, const char *devname,
141 struct rte_device *dev;
142 struct rte_devargs *da;
146 bus = rte_bus_find_by_name(busname);
148 RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
152 if (bus->plug == NULL) {
153 RTE_LOG(ERR, EAL, "Function plug not supported by bus (%s)\n",
158 name = full_dev_name(busname, devname, devargs);
162 da = calloc(1, sizeof(*da));
168 ret = rte_eal_devargs_parse(name, da);
172 ret = rte_eal_devargs_insert(da);
180 dev = bus->find_device(NULL, cmp_detached_dev_name, devname);
182 RTE_LOG(ERR, EAL, "Cannot find unplugged device (%s)\n",
188 ret = bus->plug(dev);
190 RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n",
198 if (rte_eal_devargs_remove(busname, devname)) {
207 int __rte_experimental
208 rte_eal_hotplug_remove(const char *busname, const char *devname)
211 struct rte_device *dev;
214 bus = rte_bus_find_by_name(busname);
216 RTE_LOG(ERR, EAL, "Cannot find bus (%s)\n", busname);
220 if (bus->unplug == NULL) {
221 RTE_LOG(ERR, EAL, "Function unplug not supported by bus (%s)\n",
226 dev = bus->find_device(NULL, cmp_dev_name, devname);
228 RTE_LOG(ERR, EAL, "Cannot find plugged device (%s)\n", devname);
232 ret = bus->unplug(dev);
234 RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n",
236 rte_eal_devargs_remove(busname, devname);