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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);
74 * Enable RTE_PMD_DEBUG_TRACE() when at least one component relying on the
75 * RTE_*_RET() macros defined below is compiled in debug mode.
77 #if defined(RTE_LIBRTE_ETHDEV_DEBUG) || \
78 defined(RTE_LIBRTE_CRYPTODEV_DEBUG) || \
79 defined(RTE_LIBRTE_EVENTDEV_DEBUG)
80 #define RTE_PMD_DEBUG_TRACE(...) \
81 rte_pmd_debug_trace(__func__, __VA_ARGS__)
83 #define RTE_PMD_DEBUG_TRACE(...) (void)0
86 /* Macros for checking for restricting functions to primary instance only */
87 #define RTE_PROC_PRIMARY_OR_ERR_RET(retval) do { \
88 if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
89 RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
94 #define RTE_PROC_PRIMARY_OR_RET() do { \
95 if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
96 RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
101 /* Macros to check for invalid function pointers */
102 #define RTE_FUNC_PTR_OR_ERR_RET(func, retval) do { \
103 if ((func) == NULL) { \
104 RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
109 #define RTE_FUNC_PTR_OR_RET(func) do { \
110 if ((func) == NULL) { \
111 RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
119 enum rte_kernel_driver {
120 RTE_KDRV_UNKNOWN = 0,
123 RTE_KDRV_UIO_GENERIC,
131 enum rte_dev_policy {
137 * A generic memory resource representation.
139 struct rte_mem_resource {
140 uint64_t phys_addr; /**< Physical address, 0 if not resource. */
141 uint64_t len; /**< Length of the resource. */
142 void *addr; /**< Virtual address, NULL when not mapped. */
146 * A structure describing a device driver.
149 TAILQ_ENTRY(rte_driver) next; /**< Next in list. */
150 const char *name; /**< Driver name. */
151 const char *alias; /**< Driver alias. */
155 * Internal identifier length
156 * Sufficiently large to allow for UUID or PCI address
158 #define RTE_DEV_NAME_MAX_LEN 64
161 * A structure describing a generic device.
164 TAILQ_ENTRY(rte_device) next; /**< Next device */
165 const char *name; /**< Device name */
166 const struct rte_driver *driver;/**< Associated driver */
167 int numa_node; /**< NUMA node connection */
168 struct rte_devargs *devargs; /**< Device user arguments */
172 * Attach a device to a registered driver.
175 * The device name, that refers to a pci device (or some private
176 * way of designating a vdev device). Based on this device name, eal
177 * will identify a driver capable of handling it and pass it to the
178 * driver probing function.
180 * Device arguments to be passed to the driver.
182 * 0 on success, negative on error.
184 int rte_eal_dev_attach(const char *name, const char *devargs);
187 * Detach a device from its driver.
190 * A pointer to a rte_device structure.
192 * 0 on success, negative on error.
194 int rte_eal_dev_detach(struct rte_device *dev);
198 * @b EXPERIMENTAL: this API may change without prior notice
200 * Hotplug add a given device to a specific bus.
203 * The bus name the device is added to.
205 * The device name. Based on this device name, eal will identify a driver
206 * capable of handling it and pass it to the driver probing function.
208 * Device arguments to be passed to the driver.
210 * 0 on success, negative on error.
212 int rte_eal_hotplug_add(const char *busname, const char *devname,
213 const char *devargs);
217 * @b EXPERIMENTAL: this API may change without prior notice
219 * Hotplug remove a given device from a specific bus.
222 * The bus name the device is removed from.
224 * The device name being removed.
226 * 0 on success, negative on error.
228 int rte_eal_hotplug_remove(const char *busname, const char *devname);
231 * Device comparison function.
233 * This type of function is used to compare an rte_device with arbitrary
240 * Data to compare against. The type of this parameter is determined by
241 * the kind of comparison performed by the function.
244 * 0 if the device matches the data.
245 * !0 if the device does not match.
246 * <0 if ordering is possible and the device is lower than the data.
247 * >0 if ordering is possible and the device is greater than the data.
249 typedef int (*rte_dev_cmp_t)(const struct rte_device *dev, const void *data);
251 #define RTE_PMD_EXPORT_NAME_ARRAY(n, idx) n##idx[]
253 #define RTE_PMD_EXPORT_NAME(name, idx) \
254 static const char RTE_PMD_EXPORT_NAME_ARRAY(this_pmd_name, idx) \
255 __attribute__((used)) = RTE_STR(name)
257 #define DRV_EXP_TAG(name, tag) __##name##_##tag
259 #define RTE_PMD_REGISTER_PCI_TABLE(name, table) \
260 static const char DRV_EXP_TAG(name, pci_tbl_export)[] __attribute__((used)) = \
263 #define RTE_PMD_REGISTER_PARAM_STRING(name, str) \
264 static const char DRV_EXP_TAG(name, param_string_export)[] \
265 __attribute__((used)) = str
268 * Advertise the list of kernel modules required to run this driver
270 * This string lists the kernel modules required for the devices
271 * associated to a PMD. The format of each line of the string is:
272 * "<device-pattern> <kmod-expression>".
274 * The possible formats for the device pattern are:
275 * "*" all devices supported by this driver
276 * "pci:*" all PCI devices supported by this driver
277 * "pci:v8086:d*:sv*:sd*" all PCI devices supported by this driver
278 * whose vendor id is 0x8086.
280 * The format of the kernel modules list is a parenthesed expression
281 * containing logical-and (&) and logical-or (|).
283 * The device pattern and the kmod expression are separated by a space.
286 * - "* igb_uio | uio_pci_generic | vfio"
288 #define RTE_PMD_REGISTER_KMOD_DEP(name, str) \
289 static const char DRV_EXP_TAG(name, kmod_dep_export)[] \
290 __attribute__((used)) = str
296 #endif /* _RTE_DEV_H_ */