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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"); \
123 enum rte_kernel_driver {
124 RTE_KDRV_UNKNOWN = 0,
127 RTE_KDRV_UIO_GENERIC,
135 enum rte_dev_policy {
141 * A generic memory resource representation.
143 struct rte_mem_resource {
144 uint64_t phys_addr; /**< Physical address, 0 if not resource. */
145 uint64_t len; /**< Length of the resource. */
146 void *addr; /**< Virtual address, NULL when not mapped. */
150 * A structure describing a device driver.
153 TAILQ_ENTRY(rte_driver) next; /**< Next in list. */
154 const char *name; /**< Driver name. */
155 const char *alias; /**< Driver alias. */
159 * Internal identifier length
160 * Sufficiently large to allow for UUID or PCI address
162 #define RTE_DEV_NAME_MAX_LEN 64
165 * A structure describing a generic device.
168 TAILQ_ENTRY(rte_device) next; /**< Next device */
169 const char *name; /**< Device name */
170 const struct rte_driver *driver;/**< Associated driver */
171 int numa_node; /**< NUMA node connection */
172 struct rte_devargs *devargs; /**< Device user arguments */
176 * Attach a device to a registered driver.
179 * The device name, that refers to a pci device (or some private
180 * way of designating a vdev device). Based on this device name, eal
181 * will identify a driver capable of handling it and pass it to the
182 * driver probing function.
184 * Device arguments to be passed to the driver.
186 * 0 on success, negative on error.
188 int rte_eal_dev_attach(const char *name, const char *devargs);
191 * Detach a device from its driver.
194 * A pointer to a rte_device structure.
196 * 0 on success, negative on error.
198 int rte_eal_dev_detach(struct rte_device *dev);
202 * @b EXPERIMENTAL: this API may change without prior notice
204 * Hotplug add a given device to a specific bus.
207 * The bus name the device is added to.
209 * The device name. Based on this device name, eal will identify a driver
210 * capable of handling it and pass it to the driver probing function.
212 * Device arguments to be passed to the driver.
214 * 0 on success, negative on error.
216 int rte_eal_hotplug_add(const char *busname, const char *devname,
217 const char *devargs);
221 * @b EXPERIMENTAL: this API may change without prior notice
223 * Hotplug remove a given device from a specific bus.
226 * The bus name the device is removed from.
228 * The device name being removed.
230 * 0 on success, negative on error.
232 int rte_eal_hotplug_remove(const char *busname, const char *devname);
235 * Device comparison function.
237 * This type of function is used to compare an rte_device with arbitrary
244 * Data to compare against. The type of this parameter is determined by
245 * the kind of comparison performed by the function.
248 * 0 if the device matches the data.
249 * !0 if the device does not match.
250 * <0 if ordering is possible and the device is lower than the data.
251 * >0 if ordering is possible and the device is greater than the data.
253 typedef int (*rte_dev_cmp_t)(const struct rte_device *dev, const void *data);
255 #define RTE_PMD_EXPORT_NAME_ARRAY(n, idx) n##idx[]
257 #define RTE_PMD_EXPORT_NAME(name, idx) \
258 static const char RTE_PMD_EXPORT_NAME_ARRAY(this_pmd_name, idx) \
259 __attribute__((used)) = RTE_STR(name)
261 #define DRV_EXP_TAG(name, tag) __##name##_##tag
263 #define RTE_PMD_REGISTER_PCI_TABLE(name, table) \
264 static const char DRV_EXP_TAG(name, pci_tbl_export)[] __attribute__((used)) = \
267 #define RTE_PMD_REGISTER_PARAM_STRING(name, str) \
268 static const char DRV_EXP_TAG(name, param_string_export)[] \
269 __attribute__((used)) = str
272 * Advertise the list of kernel modules required to run this driver
274 * This string lists the kernel modules required for the devices
275 * associated to a PMD. The format of each line of the string is:
276 * "<device-pattern> <kmod-expression>".
278 * The possible formats for the device pattern are:
279 * "*" all devices supported by this driver
280 * "pci:*" all PCI devices supported by this driver
281 * "pci:v8086:d*:sv*:sd*" all PCI devices supported by this driver
282 * whose vendor id is 0x8086.
284 * The format of the kernel modules list is a parenthesed expression
285 * containing logical-and (&) and logical-or (|).
287 * The device pattern and the kmod expression are separated by a space.
290 * - "* igb_uio | uio_pci_generic | vfio"
292 #define RTE_PMD_REGISTER_KMOD_DEP(name, str) \
293 static const char DRV_EXP_TAG(name, kmod_dep_export)[] \
294 __attribute__((used)) = str
300 #endif /* _RTE_DEV_H_ */