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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>
53 #include <rte_compat.h>
56 __attribute__((format(printf, 2, 0)))
58 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", func_name, buffer);
76 * Enable RTE_PMD_DEBUG_TRACE() when at least one component relying on the
77 * RTE_*_RET() macros defined below is compiled in debug mode.
79 #if defined(RTE_LIBRTE_ETHDEV_DEBUG) || \
80 defined(RTE_LIBRTE_CRYPTODEV_DEBUG) || \
81 defined(RTE_LIBRTE_EVENTDEV_DEBUG)
82 #define RTE_PMD_DEBUG_TRACE(...) \
83 rte_pmd_debug_trace(__func__, __VA_ARGS__)
85 #define RTE_PMD_DEBUG_TRACE(...) (void)0
88 /* Macros for checking for restricting functions to primary instance only */
89 #define RTE_PROC_PRIMARY_OR_ERR_RET(retval) do { \
90 if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
91 RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
96 #define RTE_PROC_PRIMARY_OR_RET() do { \
97 if (rte_eal_process_type() != RTE_PROC_PRIMARY) { \
98 RTE_PMD_DEBUG_TRACE("Cannot run in secondary processes\n"); \
103 /* Macros to check for invalid function pointers */
104 #define RTE_FUNC_PTR_OR_ERR_RET(func, retval) do { \
105 if ((func) == NULL) { \
106 RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
111 #define RTE_FUNC_PTR_OR_RET(func) do { \
112 if ((func) == NULL) { \
113 RTE_PMD_DEBUG_TRACE("Function not supported\n"); \
121 enum rte_kernel_driver {
122 RTE_KDRV_UNKNOWN = 0,
125 RTE_KDRV_UIO_GENERIC,
133 enum rte_dev_policy {
139 * A generic memory resource representation.
141 struct rte_mem_resource {
142 uint64_t phys_addr; /**< Physical address, 0 if not resource. */
143 uint64_t len; /**< Length of the resource. */
144 void *addr; /**< Virtual address, NULL when not mapped. */
148 * A structure describing a device driver.
151 TAILQ_ENTRY(rte_driver) next; /**< Next in list. */
152 const char *name; /**< Driver name. */
153 const char *alias; /**< Driver alias. */
157 * Internal identifier length
158 * Sufficiently large to allow for UUID or PCI address
160 #define RTE_DEV_NAME_MAX_LEN 64
163 * A structure describing a generic device.
166 TAILQ_ENTRY(rte_device) next; /**< Next device */
167 const char *name; /**< Device name */
168 const struct rte_driver *driver;/**< Associated driver */
169 int numa_node; /**< NUMA node connection */
170 struct rte_devargs *devargs; /**< Device user arguments */
174 * Attach a device to a registered driver.
177 * The device name, that refers to a pci device (or some private
178 * way of designating a vdev device). Based on this device name, eal
179 * will identify a driver capable of handling it and pass it to the
180 * driver probing function.
182 * Device arguments to be passed to the driver.
184 * 0 on success, negative on error.
186 int rte_eal_dev_attach(const char *name, const char *devargs);
189 * Detach a device from its driver.
192 * A pointer to a rte_device structure.
194 * 0 on success, negative on error.
196 int rte_eal_dev_detach(struct rte_device *dev);
200 * @b EXPERIMENTAL: this API may change without prior notice
202 * Hotplug add a given device to a specific bus.
205 * The bus name the device is added to.
207 * The device name. Based on this device name, eal will identify a driver
208 * capable of handling it and pass it to the driver probing function.
210 * Device arguments to be passed to the driver.
212 * 0 on success, negative on error.
214 int __rte_experimental rte_eal_hotplug_add(const char *busname, const char *devname,
215 const char *devargs);
219 * @b EXPERIMENTAL: this API may change without prior notice
221 * Hotplug remove a given device from a specific bus.
224 * The bus name the device is removed from.
226 * The device name being removed.
228 * 0 on success, negative on error.
230 int __rte_experimental rte_eal_hotplug_remove(const char *busname,
231 const char *devname);
234 * Device comparison function.
236 * This type of function is used to compare an rte_device with arbitrary
243 * Data to compare against. The type of this parameter is determined by
244 * the kind of comparison performed by the function.
247 * 0 if the device matches the data.
248 * !0 if the device does not match.
249 * <0 if ordering is possible and the device is lower than the data.
250 * >0 if ordering is possible and the device is greater than the data.
252 typedef int (*rte_dev_cmp_t)(const struct rte_device *dev, const void *data);
254 #define RTE_PMD_EXPORT_NAME_ARRAY(n, idx) n##idx[]
256 #define RTE_PMD_EXPORT_NAME(name, idx) \
257 static const char RTE_PMD_EXPORT_NAME_ARRAY(this_pmd_name, idx) \
258 __attribute__((used)) = RTE_STR(name)
260 #define DRV_EXP_TAG(name, tag) __##name##_##tag
262 #define RTE_PMD_REGISTER_PCI_TABLE(name, table) \
263 static const char DRV_EXP_TAG(name, pci_tbl_export)[] __attribute__((used)) = \
266 #define RTE_PMD_REGISTER_PARAM_STRING(name, str) \
267 static const char DRV_EXP_TAG(name, param_string_export)[] \
268 __attribute__((used)) = str
271 * Advertise the list of kernel modules required to run this driver
273 * This string lists the kernel modules required for the devices
274 * associated to a PMD. The format of each line of the string is:
275 * "<device-pattern> <kmod-expression>".
277 * The possible formats for the device pattern are:
278 * "*" all devices supported by this driver
279 * "pci:*" all PCI devices supported by this driver
280 * "pci:v8086:d*:sv*:sd*" all PCI devices supported by this driver
281 * whose vendor id is 0x8086.
283 * The format of the kernel modules list is a parenthesed expression
284 * containing logical-and (&) and logical-or (|).
286 * The device pattern and the kmod expression are separated by a space.
289 * - "* igb_uio | uio_pci_generic | vfio"
291 #define RTE_PMD_REGISTER_KMOD_DEP(name, str) \
292 static const char DRV_EXP_TAG(name, kmod_dep_export)[] \
293 __attribute__((used)) = str
299 #endif /* _RTE_DEV_H_ */