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40 * DPDK device bus interface
42 * This file exposes API and interfaces for bus abstraction
43 * over the devices and drivers in EAL.
51 #include <sys/queue.h>
56 /** Double linked list of buses */
57 TAILQ_HEAD(rte_bus_list, rte_bus);
60 * Bus specific scan for devices attached on the bus.
61 * For each bus object, the scan would be reponsible for finding devices and
62 * adding them to its private device list.
64 * A bus should mandatorily implement this method.
67 * 0 for successful scan
68 * <0 for unsuccessful scan with error value
70 typedef int (*rte_bus_scan_t)(void);
73 * A structure describing a generic bus.
76 TAILQ_ENTRY(rte_bus) next; /**< Next bus object in linked list */
77 const char *name; /**< Name of the bus */
78 rte_bus_scan_t scan; /**< Scan for devices attached to bus */
82 * Register a Bus handler.
85 * A pointer to a rte_bus structure describing the bus
88 void rte_bus_register(struct rte_bus *bus);
91 * Unregister a Bus handler.
94 * A pointer to a rte_bus structure describing the bus
97 void rte_bus_unregister(struct rte_bus *bus);
100 * Scan all the buses.
103 * 0 in case of success in scanning all buses
104 * !0 in case of failure to scan
106 int rte_bus_scan(void);
109 * Dump information of all the buses registered with EAL.
112 * A valid and open output stream handle
115 * 0 in case of success
116 * !0 in case there is error in opening the output stream
118 void rte_bus_dump(FILE *f);
121 * Helper for Bus registration.
122 * The constructor has higher priority than PMD constructors.
124 #define RTE_REGISTER_BUS(nm, bus) \
125 static void __attribute__((constructor(101), used)) businitfn_ ##nm(void) \
127 (bus).name = RTE_STR(nm);\
128 rte_bus_register(&bus); \
135 #endif /* _RTE_BUS_H */