1 /* SPDX-License-Identifier: BSD-3-Clause
11 * Generic device abstraction APIs.
13 * This API allow applications to configure and use generic devices having
14 * no specific type already available in DPDK.
21 #include <rte_common.h>
22 #include <rte_memory.h>
23 #include <rte_errno.h>
25 /* Rawdevice object - essentially a void to be typecast by implementation */
26 typedef void *rte_rawdev_obj_t;
29 * Get the total number of raw devices that have been successfully
33 * The total number of usable raw devices.
36 rte_rawdev_count(void);
39 * Get the device identifier for the named raw device.
42 * Raw device name to select the raw device identifier.
45 * Returns raw device identifier on success.
46 * - <0: Failure to find named raw device.
49 rte_rawdev_get_dev_id(const char *name);
52 * Return the NUMA socket to which a device is connected.
55 * The identifier of the device.
57 * The NUMA socket id to which the device is connected or
58 * a default of zero if the socket could not be determined.
59 * -(-EINVAL) dev_id value is out of range.
62 rte_rawdev_socket_id(uint16_t dev_id);
65 * Raw device information forward declaration
67 struct rte_rawdev_info;
70 * Retrieve the contextual information of a raw device.
73 * The identifier of the device.
75 * @param[out] dev_info
76 * A pointer to a structure of type *rte_rawdev_info* to be filled with the
77 * contextual information of the device. The dev_info->dev_private field
78 * should point to an appropriate buffer space for holding the device-
79 * specific info for that hardware.
80 * If the dev_private field is set to NULL, then the device-specific info
81 * function will not be called and only basic information about the device
82 * will be returned. This can be used to safely query the type of a rawdev
83 * instance without needing to know the size of the private data to return.
86 * - 0: Success, driver updates the contextual information of the raw device
87 * - <0: Error code returned by the driver info get function.
91 rte_rawdev_info_get(uint16_t dev_id, struct rte_rawdev_info *dev_info);
94 * Configure a raw device.
96 * This function must be invoked first before any other function in the
97 * API. This function can also be re-invoked when a device is in the
100 * The caller may use rte_rawdev_info_get() to get the capability of each
101 * resources available for this raw device.
104 * The identifier of the device to configure.
106 * The raw device configuration structure encapsulated into rte_rawdev_info
108 * It is assumed that the opaque object has enough information which the
109 * driver/implementation can use to configure the device. It is also assumed
110 * that once the configuration is done, a `queue_id` type field can be used
111 * to refer to some arbitrary internal representation of a queue.
114 * - 0: Success, device configured.
115 * - <0: Error code returned by the driver configuration function.
118 rte_rawdev_configure(uint16_t dev_id, struct rte_rawdev_info *dev_conf);
122 * Retrieve the current configuration information of a raw queue designated
123 * by its *queue_id* from the raw driver for a raw device.
125 * This function intended to be used in conjunction with rte_raw_queue_setup()
126 * where caller needs to set up the queue by overriding few default values.
129 * The identifier of the device.
131 * The index of the raw queue to get the configuration information.
132 * The value must be in the range [0, nb_raw_queues - 1]
133 * previously supplied to rte_rawdev_configure().
134 * @param[out] queue_conf
135 * The pointer to the default raw queue configuration data.
137 * - 0: Success, driver updates the default raw queue configuration data.
138 * - <0: Error code returned by the driver info get function.
140 * @see rte_raw_queue_setup()
144 rte_rawdev_queue_conf_get(uint16_t dev_id,
146 rte_rawdev_obj_t queue_conf);
149 * Allocate and set up a raw queue for a raw device.
152 * The identifier of the device.
154 * The index of the raw queue to setup. The value must be in the range
155 * [0, nb_raw_queues - 1] previously supplied to rte_rawdev_configure().
157 * The pointer to the configuration data to be used for the raw queue.
158 * NULL value is allowed, in which case default configuration used.
160 * @see rte_rawdev_queue_conf_get()
163 * - 0: Success, raw queue correctly set up.
164 * - <0: raw queue configuration failed
167 rte_rawdev_queue_setup(uint16_t dev_id,
169 rte_rawdev_obj_t queue_conf);
172 * Release and deallocate a raw queue from a raw device.
175 * The identifier of the device.
177 * The index of the raw queue to release. The value must be in the range
178 * [0, nb_raw_queues - 1] previously supplied to rte_rawdev_configure().
180 * @see rte_rawdev_queue_conf_get()
183 * - 0: Success, raw queue released.
184 * - <0: raw queue configuration failed
187 rte_rawdev_queue_release(uint16_t dev_id, uint16_t queue_id);
190 * Get the number of raw queues on a specific raw device
193 * Raw device identifier.
195 * - The number of configured raw queues
198 rte_rawdev_queue_count(uint16_t dev_id);
201 * Start a raw device.
203 * The device start step is the last one and consists of setting the raw
204 * queues to start accepting the raws and schedules to raw ports.
206 * On success, all basic functions exported by the API (raw enqueue,
207 * raw dequeue and so on) can be invoked.
210 * Raw device identifier
212 * - 0: Success, device started.
216 rte_rawdev_start(uint16_t dev_id);
219 * Stop a raw device. The device can be restarted with a call to
223 * Raw device identifier.
226 rte_rawdev_stop(uint16_t dev_id);
229 * Close a raw device. The device cannot be restarted after this call.
232 * Raw device identifier
235 * - 0 on successfully closing device
236 * - <0 on failure to close device
237 * - (-EAGAIN) if device is busy
240 rte_rawdev_close(uint16_t dev_id);
243 * Reset a raw device.
244 * This is different from cycle of rte_rawdev_start->rte_rawdev_stop in the
245 * sense similar to hard or soft reset.
248 * Raw device identifiers
250 * 0 for successful reset,
251 * !0 for failure in resetting
254 rte_rawdev_reset(uint16_t dev_id);
256 #define RTE_RAWDEV_NAME_MAX_LEN (64)
257 /**< @internal Max length of name of raw PMD */
262 * The data structure associated with each raw device.
263 * It is a placeholder for PMD specific data, encapsulating only information
264 * related to framework.
267 /**< Socket ID where memory is allocated */
269 /**< Device ID for this instance */
271 /**< Functions exported by PMD */
272 const struct rte_rawdev_ops *dev_ops;
273 /**< Device info. supplied during device initialization */
274 struct rte_device *device;
275 /**< Driver info. supplied by probing */
276 const char *driver_name;
279 /**< Flag indicating the device is attached */
280 uint8_t attached : 1;
281 /**< Device state: STARTED(1)/STOPPED(0) */
284 /**< PMD-specific private data */
285 rte_rawdev_obj_t dev_private;
287 char name[RTE_RAWDEV_NAME_MAX_LEN];
288 } __rte_cache_aligned;
290 /** @internal The pool of rte_rawdev structures. */
291 extern struct rte_rawdev *rte_rawdevs;
294 struct rte_rawdev_info {
295 /**< Name of driver handling this device */
296 const char *driver_name;
297 /**< Device encapsulation */
298 struct rte_device *device;
299 /**< Socket ID where memory is allocated */
301 /**< PMD-specific private data */
302 rte_rawdev_obj_t dev_private;
305 struct rte_rawdev_buf {
306 /**< Opaque buffer reference */
311 * Dump internal information about *dev_id* to the FILE* provided in *f*.
314 * The identifier of the device.
317 * A pointer to a file for output
324 rte_rawdev_dump(uint16_t dev_id, FILE *f);
327 * Get an attribute value from implementation.
328 * Attribute is an opaque handle agreed upon between application and PMD.
330 * Implementations are expected to maintain an array of attribute-value pairs
331 * based on application calls. Memory management for this structure is
332 * shared responsibility of implementation and application.
335 * The identifier of the device to configure.
337 * Opaque object representing an attribute in implementation.
338 * @param attr_value [out]
339 * Opaque response to the attribute value. In case of error, this remains
340 * untouched. This is double pointer of void type.
343 * !0 Error; attr_value remains untouched in case of error.
346 rte_rawdev_get_attr(uint16_t dev_id,
347 const char *attr_name,
348 uint64_t *attr_value);
351 * Set an attribute value.
352 * Attribute is an opaque handle agreed upon between application and PMD.
355 * The identifier of the device to configure.
357 * Opaque object representing an attribute in implementation.
359 * Value of the attribute represented by attr_name
365 rte_rawdev_set_attr(uint16_t dev_id,
366 const char *attr_name,
367 const uint64_t attr_value);
370 * Enqueue a stream of buffers to the device.
372 * Rather than specifying a queue, this API passes along an opaque object
373 * to the driver implementation. That object can be a queue or any other
374 * contextual information necessary for the device to enqueue buffers.
377 * The identifier of the device to configure.
379 * Collection of buffers for enqueuing
381 * Count of buffers to enqueue
383 * Opaque context information.
385 * >=0 for buffers enqueued
387 * Whether partial enqueue is failure or success is defined between app
388 * and driver implementation.
391 rte_rawdev_enqueue_buffers(uint16_t dev_id,
392 struct rte_rawdev_buf **buffers,
394 rte_rawdev_obj_t context);
397 * Dequeue a stream of buffers from the device.
399 * Rather than specifying a queue, this API passes along an opaque object
400 * to the driver implementation. That object can be a queue or any other
401 * contextual information necessary for the device to dequeue buffers.
403 * Application should have allocated enough space to store `count` response
405 * Releasing buffers dequeued is responsibility of the application.
408 * The identifier of the device to configure.
410 * Collection of buffers dequeued
412 * Max buffers expected to be dequeued
414 * Opaque context information.
416 * >=0 for buffers dequeued
418 * Whether partial enqueue is failure or success is defined between app
419 * and driver implementation.
422 rte_rawdev_dequeue_buffers(uint16_t dev_id,
423 struct rte_rawdev_buf **buffers,
425 rte_rawdev_obj_t context);
427 /** Maximum name length for extended statistics counters */
428 #define RTE_RAW_DEV_XSTATS_NAME_SIZE 64
431 * A name-key lookup element for extended statistics.
433 * This structure is used to map between names and ID numbers
434 * for extended ethdev statistics.
436 struct rte_rawdev_xstats_name {
437 char name[RTE_RAW_DEV_XSTATS_NAME_SIZE];
441 * Retrieve names of extended statistics of a raw device.
444 * The identifier of the raw device.
445 * @param[out] xstats_names
446 * Block of memory to insert names into. Must be at least size in capacity.
447 * If set to NULL, function returns required capacity.
449 * Capacity of xstats_names (number of names).
451 * - positive value lower or equal to size: success. The return value
452 * is the number of entries filled in the stats table.
453 * - positive value higher than size: error, the given statistics table
454 * is too small. The return value corresponds to the size that should
455 * be given to succeed. The entries in the table are not valid and
456 * shall not be used by the caller.
457 * - negative value on error:
458 * -ENODEV for invalid *dev_id*
459 * -ENOTSUP if the device doesn't support this function.
462 rte_rawdev_xstats_names_get(uint16_t dev_id,
463 struct rte_rawdev_xstats_name *xstats_names,
467 * Retrieve extended statistics of a raw device.
470 * The identifier of the device.
472 * The id numbers of the stats to get. The ids can be got from the stat
473 * position in the stat list from rte_rawdev_get_xstats_names(), or
474 * by using rte_rawdev_get_xstats_by_name()
476 * The values for each stats request by ID.
478 * The number of stats requested
480 * - positive value: number of stat entries filled into the values array
481 * - negative value on error:
482 * -ENODEV for invalid *dev_id*
483 * -ENOTSUP if the device doesn't support this function.
486 rte_rawdev_xstats_get(uint16_t dev_id,
487 const unsigned int ids[],
492 * Retrieve the value of a single stat by requesting it by name.
495 * The identifier of the device
497 * The stat name to retrieve
499 * If non-NULL, the numerical id of the stat will be returned, so that further
500 * requests for the stat can be got using rte_rawdev_xstats_get, which will
501 * be faster as it doesn't need to scan a list of names for the stat.
502 * If the stat cannot be found, the id returned will be (unsigned)-1.
504 * - positive value or zero: the stat value
505 * - negative value: -EINVAL if stat not found, -ENOTSUP if not supported.
508 rte_rawdev_xstats_by_name_get(uint16_t dev_id,
513 * Reset the values of the xstats of the selected component in the device.
516 * The identifier of the device
518 * Selects specific statistics to be reset. When NULL, all statistics
519 * will be reset. If non-NULL, must point to array of at least
522 * The number of ids available from the *ids* array. Ignored when ids is NULL.
524 * - zero: successfully reset the statistics to zero
525 * - negative value: -EINVAL invalid parameters, -ENOTSUP if not supported.
528 rte_rawdev_xstats_reset(uint16_t dev_id,
529 const uint32_t ids[],
533 * Get Firmware status of the device..
534 * Returns a memory allocated by driver/implementation containing status
535 * information block. It is responsibility of caller to release the buffer.
538 * Raw device identifier
540 * Pointer to status information area. Caller is responsible for releasing
541 * the memory associated.
544 * !0 for failure, `status_info` argument state is undefined
547 rte_rawdev_firmware_status_get(uint16_t dev_id,
548 rte_rawdev_obj_t status_info);
551 * Get Firmware version of the device.
552 * Returns a memory allocated by driver/implementation containing version
553 * information block. It is responsibility of caller to release the buffer.
556 * Raw device identifier
557 * @param version_info
558 * Pointer to version information area. Caller is responsible for releasing
559 * the memory associated.
562 * !0 for failure, `version_info` argument state is undefined
565 rte_rawdev_firmware_version_get(uint16_t dev_id,
566 rte_rawdev_obj_t version_info);
569 * Load firmware on the device.
570 * TODO: In future, methods like directly flashing from file too can be
574 * Raw device identifier
575 * @param firmware_image
576 * Pointer to buffer containing image binary data
578 * 0 for successful load
579 * !0 for failure to load the provided image, or image incorrect.
582 rte_rawdev_firmware_load(uint16_t dev_id, rte_rawdev_obj_t firmware_image);
585 * Unload firmware from the device.
588 * Raw device identifiers
590 * 0 for successful Unload
591 * !0 for failure in unloading
594 rte_rawdev_firmware_unload(uint16_t dev_id);
597 * Trigger the rawdev self test.
600 * The identifier of the device
602 * - 0: Selftest successful
603 * - -ENOTSUP if the device doesn't support selftest
604 * - other values < 0 on failure.
607 rte_rawdev_selftest(uint16_t dev_id);
613 #endif /* _RTE_RAWDEV_H_ */