include/linux/counter.h

3  * Counter interface
17 #include <uapi/linux/counter.h>
39  * struct counter_comp - Counter component node
40  * @type:		Counter component data type
157 		int (*action_read)(struct counter_device *counter,
161 		int (*device_u8_read)(struct counter_device *counter, u8 *val);
162 		int (*count_u8_read)(struct counter_device *counter,
164 		int (*signal_u8_read)(struct counter_device *counter,
166 		int (*device_u32_read)(struct counter_device *counter,
168 		int (*count_u32_read)(struct counter_device *counter,
170 		int (*signal_u32_read)(struct counter_device *counter,
172 		int (*device_u64_read)(struct counter_device *counter,
174 		int (*count_u64_read)(struct counter_device *counter,
176 		int (*signal_u64_read)(struct counter_device *counter,
178 		int (*signal_array_u32_read)(struct counter_device *counter,
181 		int (*device_array_u64_read)(struct counter_device *counter,
183 		int (*count_array_u64_read)(struct counter_device *counter,
186 		int (*signal_array_u64_read)(struct counter_device *counter,
191 		int (*action_write)(struct counter_device *counter,
195 		int (*device_u8_write)(struct counter_device *counter, u8 val);
196 		int (*count_u8_write)(struct counter_device *counter,
198 		int (*signal_u8_write)(struct counter_device *counter,
200 		int (*device_u32_write)(struct counter_device *counter,
202 		int (*count_u32_write)(struct counter_device *counter,
204 		int (*signal_u32_write)(struct counter_device *counter,
206 		int (*device_u64_write)(struct counter_device *counter,
208 		int (*count_u64_write)(struct counter_device *counter,
210 		int (*signal_u64_write)(struct counter_device *counter,
212 		int (*signal_array_u32_write)(struct counter_device *counter,
215 		int (*device_array_u64_write)(struct counter_device *counter,
217 		int (*count_array_u64_write)(struct counter_device *counter,
220 		int (*signal_array_u64_write)(struct counter_device *counter,
227  * struct counter_signal - Counter Signal node
242  * struct counter_synapse - Counter Synapse node
255  * struct counter_count - Counter Count node
280  * struct counter_event_node - Counter Event node
281  * @l:		list of current watching Counter events
318  *			events_list member of the counter parameter.
319  * @watch_validate:	optional callback to validate a watch. The Counter
321  *			parameter. A return value of 0 indicates a valid Counter
325 	int (*signal_read)(struct counter_device *counter,
328 	int (*count_read)(struct counter_device *counter,
330 	int (*count_write)(struct counter_device *counter,
332 	int (*function_read)(struct counter_device *counter,
335 	int (*function_write)(struct counter_device *counter,
338 	int (*action_read)(struct counter_device *counter,
342 	int (*action_write)(struct counter_device *counter,
346 	int (*events_configure)(struct counter_device *counter);
347 	int (*watch_validate)(struct counter_device *counter,
352  * struct counter_device - Counter data structure
360  * @ext:		optional array of Counter device extensions
361  * @num_ext:		number of Counter device extensions specified in @ext
365  * @events_list:	list of current watching Counter events
366  * @events_list_lock:	lock to protect Counter events list operations
367  * @next_events_list:	list of next watching Counter events
368  * @n_events_list_lock:	lock to protect Counter next events list operations
369  * @events:		queue of detected Counter events
370  * @events_wait:	wait queue to allow blocking reads of Counter events
371  * @events_in_lock:	lock to protect Counter events queue in operations
372  * @events_out_lock:	lock to protect Counter events queue out operations
402 void *counter_priv(const struct counter_device *const counter) __attribute_const__;
405 void counter_put(struct counter_device *const counter);
406 int counter_add(struct counter_device *const counter);
408 void counter_unregister(struct counter_device *const counter);
412 		     struct counter_device *const counter);
413 void counter_push_event(struct counter_device *const counter, const u8 event,