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40 * RTE PMD Driver Registration Interface
42 * This file manages the list of device drivers.
50 #include <sys/queue.h>
52 #include <rte_config.h>
55 __attribute__((format(printf, 2, 0)))
57 rte_pmd_debug_trace(const char *func_name, const char *fmt, ...)
64 char buffer[vsnprintf(NULL, 0, fmt, ap) + 1];
69 vsnprintf(buffer, sizeof(buffer), fmt, ap);
72 rte_log(RTE_LOG_ERR, RTE_LOGTYPE_PMD, "%s: %s",
78 * Enable RTE_PMD_DEBUG_TRACE() when at least one component relying on the
79 * RTE_*_RET() macros defined below is compiled in debug mode.
81 #if defined(RTE_LIBRTE_ETHDEV_DEBUG) || \
82 defined(RTE_LIBRTE_CRYPTODEV_DEBUG) || \
83 defined(RTE_LIBRTE_EVENTDEV_DEBUG)
84 #define RTE_PMD_DEBUG_TRACE(...) \
85 rte_pmd_debug_trace(__func__, __VA_ARGS__)
87 #define RTE_PMD_DEBUG_TRACE(...) (void)0
90 /* Macros for checking for restricting functions to primary instance only */
91 #define RTE_PROC_PRIMARY_OR_ERR_RET(retval) do { \
92 if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
93 RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
98 #define RTE_PROC_PRIMARY_OR_RET() do { \
99 if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
100 RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
105 /* Macros to check for invalid function pointers */
106 #define RTE_FUNC_PTR_OR_ERR_RET(func, retval) do { \
107 if ((func) == NULL) { \
108 RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
113 #define RTE_FUNC_PTR_OR_RET(func) do { \
114 if ((func) == NULL) { \
115 RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
121 * A generic memory resource representation.
123 struct rte_mem_resource {
124 uint64_t phys_addr; /**< Physical address, 0 if not resource. */
125 uint64_t len; /**< Length of the resource. */
126 void *addr; /**< Virtual address, NULL when not mapped. */
129 /** Double linked list of device drivers. */
130 TAILQ_HEAD(rte_driver_list, rte_driver);
131 /** Double linked list of devices. */
132 TAILQ_HEAD(rte_device_list, rte_device);
134 /* Forward declaration */
138 * A structure describing a generic device.
141 TAILQ_ENTRY(rte_device) next; /**< Next device */
142 struct rte_driver *driver; /**< Associated driver */
143 int numa_node; /**< NUMA node connection */
144 struct rte_devargs *devargs; /**< Device user arguments */
148 * Insert a device detected by a bus scanning.
151 * A pointer to a rte_device structure describing the detected device.
153 void rte_eal_device_insert(struct rte_device *dev);
156 * Remove a device (e.g. when being unplugged).
159 * A pointer to a rte_device structure describing the device to be removed.
161 void rte_eal_device_remove(struct rte_device *dev);
164 * A structure describing a device driver.
167 TAILQ_ENTRY(rte_driver) next; /**< Next in list. */
168 const char *name; /**< Driver name. */
169 const char *alias; /**< Driver alias. */
173 * Register a device driver.
176 * A pointer to a rte_dev structure describing the driver
179 void rte_eal_driver_register(struct rte_driver *driver);
182 * Unregister a device driver.
185 * A pointer to a rte_dev structure describing the driver
186 * to be unregistered.
188 void rte_eal_driver_unregister(struct rte_driver *driver);
191 * Initalize all the registered drivers in this process
193 int rte_eal_dev_init(void);
196 * Initialize a driver specified by name.
199 * The pointer to a driver name to be initialized.
201 * The pointer to arguments used by driver initialization.
203 * 0 on success, negative on error
205 int rte_eal_vdev_init(const char *name, const char *args);
208 * Uninitalize a driver specified by name.
211 * The pointer to a driver name to be initialized.
213 * 0 on success, negative on error
215 int rte_eal_vdev_uninit(const char *name);
218 * Attach a device to a registered driver.
221 * The device name, that refers to a pci device (or some private
222 * way of designating a vdev device). Based on this device name, eal
223 * will identify a driver capable of handling it and pass it to the
224 * driver probing function.
226 * Device arguments to be passed to the driver.
228 * 0 on success, negative on error.
230 int rte_eal_dev_attach(const char *name, const char *devargs);
233 * Detach a device from its driver.
236 * Same description as for rte_eal_dev_attach().
237 * Here, eal will call the driver detaching function.
239 * 0 on success, negative on error.
241 int rte_eal_dev_detach(const char *name);
243 #define RTE_PMD_EXPORT_NAME_ARRAY(n, idx) n##idx[]
245 #define RTE_PMD_EXPORT_NAME(name, idx) \
246 static const char RTE_PMD_EXPORT_NAME_ARRAY(this_pmd_name, idx) \
247 __attribute__((used)) = RTE_STR(name)
249 #define DRV_EXP_TAG(name, tag) __##name##_##tag
251 #define RTE_PMD_REGISTER_PCI_TABLE(name, table) \
252 static const char DRV_EXP_TAG(name, pci_tbl_export)[] __attribute__((used)) = \
255 #define RTE_PMD_REGISTER_PARAM_STRING(name, str) \
256 static const char DRV_EXP_TAG(name, param_string_export)[] \
257 __attribute__((used)) = str
263 #endif /* _RTE_VDEV_H_ */