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35 #include <sys/queue.h>
38 #include <rte_debug.h>
39 #include <rte_string_fns.h>
41 #include "eal_private.h"
43 struct rte_bus_list rte_bus_list =
44 TAILQ_HEAD_INITIALIZER(rte_bus_list);
47 rte_bus_register(struct rte_bus *bus)
50 RTE_VERIFY(bus->name && strlen(bus->name));
51 /* A bus should mandatorily have the scan implemented */
52 RTE_VERIFY(bus->scan);
53 RTE_VERIFY(bus->probe);
54 RTE_VERIFY(bus->find_device);
55 /* Buses supporting driver plug also require unplug. */
56 RTE_VERIFY(!bus->plug || bus->unplug);
58 TAILQ_INSERT_TAIL(&rte_bus_list, bus, next);
59 RTE_LOG(DEBUG, EAL, "Registered [%s] bus.\n", bus->name);
63 rte_bus_unregister(struct rte_bus *bus)
65 TAILQ_REMOVE(&rte_bus_list, bus, next);
66 RTE_LOG(DEBUG, EAL, "Unregistered [%s] bus.\n", bus->name);
69 /* Scan all the buses for registered devices */
74 struct rte_bus *bus = NULL;
76 TAILQ_FOREACH(bus, &rte_bus_list, next) {
79 RTE_LOG(ERR, EAL, "Scan for (%s) bus failed.\n",
86 /* Probe all devices of all buses */
91 struct rte_bus *bus, *vbus = NULL;
93 TAILQ_FOREACH(bus, &rte_bus_list, next) {
94 if (!strcmp(bus->name, "vdev")) {
101 RTE_LOG(ERR, EAL, "Bus (%s) probe failed.\n",
108 RTE_LOG(ERR, EAL, "Bus (%s) probe failed.\n",
115 /* Dump information of a single bus */
117 bus_dump_one(FILE *f, struct rte_bus *bus)
121 /* For now, dump only the bus name */
122 ret = fprintf(f, " %s\n", bus->name);
124 /* Error in case of inability in writing to stream */
132 rte_bus_dump(FILE *f)
137 TAILQ_FOREACH(bus, &rte_bus_list, next) {
138 ret = bus_dump_one(f, bus);
140 RTE_LOG(ERR, EAL, "Unable to write to stream (%d)\n",
148 rte_bus_find(const struct rte_bus *start, rte_bus_cmp_t cmp,
154 bus = TAILQ_NEXT(start, next);
156 bus = TAILQ_FIRST(&rte_bus_list);
157 while (bus != NULL) {
158 if (cmp(bus, data) == 0)
160 bus = TAILQ_NEXT(bus, next);
166 cmp_rte_device(const struct rte_device *dev1, const void *_dev2)
168 const struct rte_device *dev2 = _dev2;
174 bus_find_device(const struct rte_bus *bus, const void *_dev)
176 struct rte_device *dev;
178 dev = bus->find_device(NULL, cmp_rte_device, _dev);
183 rte_bus_find_by_device(const struct rte_device *dev)
185 return rte_bus_find(NULL, bus_find_device, (const void *)dev);
189 cmp_bus_name(const struct rte_bus *bus, const void *_name)
191 const char *name = _name;
193 return strcmp(bus->name, name);
197 rte_bus_find_by_name(const char *busname)
199 return rte_bus_find(NULL, cmp_bus_name, (const void *)busname);
203 bus_can_parse(const struct rte_bus *bus, const void *_name)
205 const char *name = _name;
207 return !(bus->parse && bus->parse(name, NULL) == 0);
211 rte_bus_find_by_device_name(const char *str)
213 char name[RTE_DEV_NAME_MAX_LEN];
216 strlcpy(name, str, sizeof(name));
217 c = strchr(name, ',');
220 return rte_bus_find(NULL, bus_can_parse, name);
225 * Get iommu class of devices on the bus.
228 rte_bus_get_iommu_class(void)
230 int mode = RTE_IOVA_DC;
233 TAILQ_FOREACH(bus, &rte_bus_list, next) {
235 if (bus->get_iommu_class)
236 mode |= bus->get_iommu_class();
239 if (mode != RTE_IOVA_VA) {
240 /* Use default IOVA mode */