4 * Copyright(c) 2014 6WIND S.A.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of 6WIND S.A. nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * A structure describing a device driver.
111 TAILQ_ENTRY(rte_driver) next; /**< Next in list. */
112 const char *name; /**< Driver name. */
116 * Register a device driver.
119 * A pointer to a rte_dev structure describing the driver
122 void rte_eal_driver_register(struct rte_driver *driver);
125 * Unregister a device driver.
128 * A pointer to a rte_dev structure describing the driver
129 * to be unregistered.
131 void rte_eal_driver_unregister(struct rte_driver *driver);
134 * Initalize all the registered drivers in this process
136 int rte_eal_dev_init(void);
139 * Initialize a driver specified by name.
142 * The pointer to a driver name to be initialized.
144 * The pointer to arguments used by driver initialization.
146 * 0 on success, negative on error
148 int rte_eal_vdev_init(const char *name, const char *args);
151 * Uninitalize a driver specified by name.
154 * The pointer to a driver name to be initialized.
156 * 0 on success, negative on error
158 int rte_eal_vdev_uninit(const char *name);
161 * Attach a device to a registered driver.
164 * The device name, that refers to a pci device (or some private
165 * way of designating a vdev device). Based on this device name, eal
166 * will identify a driver capable of handling it and pass it to the
167 * driver probing function.
169 * Device arguments to be passed to the driver.
171 * 0 on success, negative on error.
173 int rte_eal_dev_attach(const char *name, const char *devargs);
176 * Detach a device from its driver.
179 * Same description as for rte_eal_dev_attach().
180 * Here, eal will call the driver detaching function.
182 * 0 on success, negative on error.
184 int rte_eal_dev_detach(const char *name);
186 #define DRIVER_EXPORT_NAME_ARRAY(n, idx) n##idx[]
188 #define DRIVER_EXPORT_NAME(name, idx) \
189 static const char DRIVER_EXPORT_NAME_ARRAY(this_pmd_name, idx) \
190 __attribute__((used)) = RTE_STR(name)
192 #define DRV_EXP_TAG(name, tag) __##name##_##tag
194 #define DRIVER_REGISTER_PCI_TABLE(name, table) \
195 static const char DRV_EXP_TAG(name, pci_tbl_export)[] __attribute__((used)) = \
198 #define DRIVER_REGISTER_PARAM_STRING(name, str) \
199 static const char DRV_EXP_TAG(name, param_string_export)[] \
200 __attribute__((used)) = str
206 #endif /* _RTE_VDEV_H_ */