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40 * RTE PMD Driver Registration Interface
42 * This file manages the list of device drivers.
50 #include <sys/queue.h>
54 __attribute__((format(printf, 2, 0)))
56 rte_pmd_debug_trace(const char *func_name, const char *fmt, ...)
62 char buffer[vsnprintf(NULL, 0, fmt, ap) + 1];
67 vsnprintf(buffer, sizeof(buffer), fmt, ap);
70 rte_log(RTE_LOG_ERR, RTE_LOGTYPE_PMD, "%s: %s", func_name, buffer);
73 /* Macros for checking for restricting functions to primary instance only */
74 #define RTE_PROC_PRIMARY_OR_ERR_RET(retval) do { \
75 if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
76 RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
81 #define RTE_PROC_PRIMARY_OR_RET() do { \
82 if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
83 RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
88 /* Macros to check for invalid function pointers */
89 #define RTE_FUNC_PTR_OR_ERR_RET(func, retval) do { \
90 if ((func) == NULL) { \
91 RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
96 #define RTE_FUNC_PTR_OR_RET(func) do { \
97 if ((func) == NULL) { \
98 RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
104 /** Double linked list of device drivers. */
105 TAILQ_HEAD(rte_driver_list, rte_driver);
108 * Driver type enumeration
116 * A structure describing a device driver.
119 TAILQ_ENTRY(rte_driver) next; /**< Next in list. */
120 enum pmd_type type; /**< PMD Driver type */
121 const char *name; /**< Driver name. */
125 * Register a device driver.
128 * A pointer to a rte_dev structure describing the driver
131 void rte_eal_driver_register(struct rte_driver *driver);
134 * Unregister a device driver.
137 * A pointer to a rte_dev structure describing the driver
138 * to be unregistered.
140 void rte_eal_driver_unregister(struct rte_driver *driver);
143 * Initalize all the registered drivers in this process
145 int rte_eal_dev_init(void);
148 * Initialize a driver specified by name.
151 * The pointer to a driver name to be initialized.
153 * The pointer to arguments used by driver initialization.
155 * 0 on success, negative on error
157 int rte_eal_vdev_init(const char *name, const char *args);
160 * Uninitalize a driver specified by name.
163 * The pointer to a driver name to be initialized.
165 * 0 on success, negative on error
167 int rte_eal_vdev_uninit(const char *name);
170 * Attach a device to a registered driver.
173 * The device name, that refers to a pci device (or some private
174 * way of designating a vdev device). Based on this device name, eal
175 * will identify a driver capable of handling it and pass it to the
176 * driver probing function.
178 * Device arguments to be passed to the driver.
180 * 0 on success, negative on error.
182 int rte_eal_dev_attach(const char *name, const char *devargs);
185 * Detach a device from its driver.
188 * Same description as for rte_eal_dev_attach().
189 * Here, eal will call the driver detaching function.
191 * 0 on success, negative on error.
193 int rte_eal_dev_detach(const char *name);
195 #define DRIVER_EXPORT_NAME_ARRAY(n, idx) n##idx[]
197 #define DRIVER_EXPORT_NAME(name, idx) \
198 static const char DRIVER_EXPORT_NAME_ARRAY(this_pmd_name, idx) \
199 __attribute__((used)) = RTE_STR(name)
201 #define PMD_REGISTER_DRIVER(drv, nm)\
202 RTE_INIT(probefn_ ##drv);\
203 static void probefn_ ##drv(void)\
205 (drv).name = RTE_STR(nm);\
206 rte_eal_driver_register(&drv);\
208 DRIVER_EXPORT_NAME(nm, __COUNTER__)
210 #define DRV_EXP_TAG(name, tag) __##name##_##tag
212 #define DRIVER_REGISTER_PCI_TABLE(name, table) \
213 static const char DRV_EXP_TAG(name, pci_tbl_export)[] __attribute__((used)) = \
216 #define DRIVER_REGISTER_PARAM_STRING(name, str) \
217 static const char DRV_EXP_TAG(name, param_string_export)[] \
218 __attribute__((used)) = str
224 #endif /* _RTE_VDEV_H_ */