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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/include/media/videobuf2-core.h
....@@ -17,6 +17,7 @@
1717 #include <linux/poll.h>
1818 #include <linux/dma-buf.h>
1919 #include <linux/bitops.h>
20
+#include <media/media-request.h>
2021 
2122 #define VB2_MAX_FRAME	(64)
2223 #define VB2_MAX_PLANES	(8)
....@@ -53,7 +54,8 @@
5354  *		will then be passed as @buf_priv argument to other ops in this
5455  *		structure. Additional gfp_flags to use when allocating the
5556  *		are also passed to this operation. These flags are from the
56
- *		gfp_flags field of vb2_queue.
57
+ *		gfp_flags field of vb2_queue. The size argument to this function
58
+ *		shall be *page aligned*.
5759  * @put:	inform the allocator that the buffer will no longer be used;
5860  *		usually will result in the allocator freeing the buffer (if
5961  *		no other users of this buffer are present); the @buf_priv
....@@ -203,10 +205,9 @@
203205 /**
204206  * enum vb2_buffer_state - current video buffer state.
205207  * @VB2_BUF_STATE_DEQUEUED:	buffer under userspace control.
208
+ * @VB2_BUF_STATE_IN_REQUEST:	buffer is queued in media request.
206209  * @VB2_BUF_STATE_PREPARING:	buffer is being prepared in videobuf.
207
- * @VB2_BUF_STATE_PREPARED:	buffer prepared in videobuf and by the driver.
208210  * @VB2_BUF_STATE_QUEUED:	buffer queued in videobuf, but not in driver.
209
- * @VB2_BUF_STATE_REQUEUEING:	re-queue a buffer to the driver.
210211  * @VB2_BUF_STATE_ACTIVE:	buffer queued in driver and possibly used
211212  *				in a hardware operation.
212213  * @VB2_BUF_STATE_DONE:		buffer returned from driver to videobuf, but
....@@ -217,10 +218,9 @@
217218  */
218219 enum vb2_buffer_state {
219220 	VB2_BUF_STATE_DEQUEUED,
221
+	VB2_BUF_STATE_IN_REQUEST,
220222 	VB2_BUF_STATE_PREPARING,
221
-	VB2_BUF_STATE_PREPARED,
222223 	VB2_BUF_STATE_QUEUED,
223
-	VB2_BUF_STATE_REQUEUEING,
224224 	VB2_BUF_STATE_ACTIVE,
225225 	VB2_BUF_STATE_DONE,
226226 	VB2_BUF_STATE_ERROR,
....@@ -238,6 +238,9 @@
238238  * @num_planes:		number of planes in the buffer
239239  *			on an internal driver queue.
240240  * @timestamp:		frame timestamp in ns.
241
+ * @request:		the request this buffer is associated with.
242
+ * @req_obj:		used to bind this buffer to a request. This
243
+ *			request object has a refcount.
241244  */
242245 struct vb2_buffer {
243246 	struct vb2_queue	*vb2_queue;
....@@ -246,10 +249,20 @@
246249 	unsigned int		memory;
247250 	unsigned int		num_planes;
248251 	u64			timestamp;
252
+	struct media_request	*request;
253
+	struct media_request_object	req_obj;
249254 
250255 	/* private: internal use only
251256 	 *
252257 	 * state:		current buffer state; do not change
258
+	 * synced:		this buffer has been synced for DMA, i.e. the
259
+	 *			'prepare' memop was called. It is cleared again
260
+	 *			after the 'finish' memop is called.
261
+	 * prepared:		this buffer has been prepared, i.e. the
262
+	 *			buf_prepare op was called. It is cleared again
263
+	 *			after the 'buf_finish' op is called.
264
+	 * copied_timestamp:	the timestamp of this capture buffer was copied
265
+	 *			from an output buffer.
253266 	 * need_cache_sync_on_prepare: when set buffer's ->prepare() function
254267 	 *			performs cache sync/invalidation.
255268 	 * need_cache_sync_on_finish: when set buffer's ->finish() function
....@@ -261,6 +274,9 @@
261274 	 * vb2_plane:		per-plane information; do not change
262275 	 */
263276 	enum vb2_buffer_state	state;
277
+	unsigned int		synced:1;
278
+	unsigned int		prepared:1;
279
+	unsigned int		copied_timestamp:1;
264280 	unsigned int		need_cache_sync_on_prepare:1;
265281 	unsigned int		need_cache_sync_on_finish:1;
266282 
....@@ -288,11 +304,13 @@
288304 	u32		cnt_mem_num_users;
289305 	u32		cnt_mem_mmap;
290306 
307
+	u32		cnt_buf_out_validate;
291308 	u32		cnt_buf_init;
292309 	u32		cnt_buf_prepare;
293310 	u32		cnt_buf_finish;
294311 	u32		cnt_buf_cleanup;
295312 	u32		cnt_buf_queue;
313
+	u32		cnt_buf_request_complete;
296314 
297315 	/* This counts the number of calls to vb2_buffer_done() */
298316 	u32		cnt_buf_done;
....@@ -333,6 +351,10 @@
333351  * @wait_finish:	reacquire all locks released in the previous callback;
334352  *			required to continue operation after sleeping while
335353  *			waiting for a new buffer to arrive.
354
+ * @buf_out_validate:	called when the output buffer is prepared or queued
355
+ *			to a request; drivers can use this to validate
356
+ *			userspace-provided information; this is required only
357
+ *			for OUTPUT queues.
336358  * @buf_init:		called once after allocating a buffer (in MMAP case)
337359  *			or after acquiring a new USERPTR buffer; drivers may
338360  *			perform additional buffer-related initialization;
....@@ -367,10 +389,10 @@
367389  *			driver can return an error if hardware fails, in that
368390  *			case all buffers that have been already given by
369391  *			the @buf_queue callback are to be returned by the driver
370
- *			by calling vb2_buffer_done() with %VB2_BUF_STATE_QUEUED
371
- *			or %VB2_BUF_STATE_REQUEUEING. If you need a minimum
372
- *			number of buffers before you can start streaming, then
373
- *			set &vb2_queue->min_buffers_needed. If that is non-zero
392
+ *			by calling vb2_buffer_done() with %VB2_BUF_STATE_QUEUED.
393
+ *			If you need a minimum number of buffers before you can
394
+ *			start streaming, then set
395
+ *			&vb2_queue->min_buffers_needed. If that is non-zero
374396  *			then @start_streaming won't be called until at least
375397  *			that many buffers have been queued up by userspace.
376398  * @stop_streaming:	called when 'streaming' state must be disabled; driver
....@@ -382,10 +404,15 @@
382404  * @buf_queue:		passes buffer vb to the driver; driver may start
383405  *			hardware operation on this buffer; driver should give
384406  *			the buffer back by calling vb2_buffer_done() function;
385
- *			it is allways called after calling VIDIOC_STREAMON()
407
+ *			it is always called after calling VIDIOC_STREAMON()
386408  *			ioctl; might be called before @start_streaming callback
387409  *			if user pre-queued buffers before calling
388410  *			VIDIOC_STREAMON().
411
+ * @buf_request_complete: a buffer that was never queued to the driver but is
412
+ *			associated with a queued request was canceled.
413
+ *			The driver will have to mark associated objects in the
414
+ *			request as completed; required if requests are
415
+ *			supported.
389416  */
390417 struct vb2_ops {
391418 	int (*queue_setup)(struct vb2_queue *q,
....@@ -395,6 +422,7 @@
395422 	void (*wait_prepare)(struct vb2_queue *q);
396423 	void (*wait_finish)(struct vb2_queue *q);
397424 
425
+	int (*buf_out_validate)(struct vb2_buffer *vb);
398426 	int (*buf_init)(struct vb2_buffer *vb);
399427 	int (*buf_prepare)(struct vb2_buffer *vb);
400428 	void (*buf_finish)(struct vb2_buffer *vb);
....@@ -404,6 +432,8 @@
404432 	void (*stop_streaming)(struct vb2_queue *q);
405433 
406434 	void (*buf_queue)(struct vb2_buffer *vb);
435
+
436
+	void (*buf_request_complete)(struct vb2_buffer *vb);
407437 };
408438 
409439 /**
....@@ -412,6 +442,9 @@
412442  * @verify_planes_array: Verify that a given user space structure contains
413443  *			enough planes for the buffer. This is called
414444  *			for each dequeued buffer.
445
+ * @init_buffer:	given a &vb2_buffer initialize the extra data after
446
+ *			struct vb2_buffer.
447
+ *			For V4L2 this is a &struct vb2_v4l2_buffer.
415448  * @fill_user_buffer:	given a &vb2_buffer fill in the userspace structure.
416449  *			For V4L2 this is a &struct v4l2_buffer.
417450  * @fill_vb2_buffer:	given a userspace structure, fill in the &vb2_buffer.
....@@ -422,9 +455,9 @@
422455  */
423456 struct vb2_buf_ops {
424457 	int (*verify_planes_array)(struct vb2_buffer *vb, const void *pb);
458
+	void (*init_buffer)(struct vb2_buffer *vb);
425459 	void (*fill_user_buffer)(struct vb2_buffer *vb, void *pb);
426
-	int (*fill_vb2_buffer)(struct vb2_buffer *vb, const void *pb,
427
-				struct vb2_plane *planes);
460
+	int (*fill_vb2_buffer)(struct vb2_buffer *vb, struct vb2_plane *planes);
428461 	void (*copy_timestamp)(struct vb2_buffer *vb, const void *pb);
429462 };
430463 
....@@ -455,6 +488,15 @@
455488  * @quirk_poll_must_check_waiting_for_buffers: Return %EPOLLERR at poll when QBUF
456489  *              has not been called. This is a vb1 idiom that has been adopted
457490  *              also by vb2.
491
+ * @supports_requests: this queue supports the Request API.
492
+ * @requires_requests: this queue requires the Request API. If this is set to 1,
493
+ *		then supports_requests must be set to 1 as well.
494
+ * @uses_qbuf:	qbuf was used directly for this queue. Set to 1 the first
495
+ *		time this is called. Set to 0 when the queue is canceled.
496
+ *		If this is 1, then you cannot queue buffers from a request.
497
+ * @uses_requests: requests are used for this queue. Set to 1 the first time
498
+ *		a request is queued. Set to 0 when the queue is canceled.
499
+ *		If this is 1, then you cannot queue buffers directly.
458500  * @allow_cache_hints: when set user-space can pass cache management hints in
459501  *		order to skip cache flush/invalidation on ->prepare() or/and
460502  *		->finish().
....@@ -472,10 +514,15 @@
472514  * @buf_ops:	callbacks to deliver buffer information.
473515  *		between user-space and kernel-space.
474516  * @drv_priv:	driver private data.
517
+ * @subsystem_flags: Flags specific to the subsystem (V4L2/DVB/etc.). Not used
518
+ *		by the vb2 core.
475519  * @buf_struct_size: size of the driver-specific buffer structure;
476520  *		"0" indicates the driver doesn't want to use a custom buffer
477
- *		structure type. for example, ``sizeof(struct vb2_v4l2_buffer)``
478
- *		will be used for v4l2.
521
+ *		structure type. In that case a subsystem-specific struct
522
+ *		will be used (in the case of V4L2 that is
523
+ *		``sizeof(struct vb2_v4l2_buffer)``). The first field of the
524
+ *		driver-specific buffer structure must be the subsystem-specific
525
+ *		struct (vb2_v4l2_buffer in the case of V4L2).
479526  * @timestamp_flags: Timestamp flags; ``V4L2_BUF_FLAG_TIMESTAMP_*`` and
480527  *		``V4L2_BUF_FLAG_TSTAMP_SRC_*``
481528  * @gfp_flags:	additional gfp flags used when allocating the buffers.
....@@ -514,17 +561,23 @@
514561  *		when a buffer with the %V4L2_BUF_FLAG_LAST is dequeued.
515562  * @fileio:	file io emulator internal data, used only if emulator is active
516563  * @threadio:	thread io internal data, used only if thread is active
564
+ * @name:	queue name, used for logging purpose. Initialized automatically
565
+ *		if left empty by drivers.
517566  */
518567 struct vb2_queue {
519568 	unsigned int			type;
520569 	unsigned int			io_modes;
521570 	struct device			*dev;
522571 	unsigned long			dma_attrs;
523
-	unsigned			bidirectional:1;
524
-	unsigned			fileio_read_once:1;
525
-	unsigned			fileio_write_immediately:1;
526
-	unsigned			allow_zero_bytesused:1;
527
-	unsigned		   quirk_poll_must_check_waiting_for_buffers:1;
572
+	unsigned int			bidirectional:1;
573
+	unsigned int			fileio_read_once:1;
574
+	unsigned int			fileio_write_immediately:1;
575
+	unsigned int			allow_zero_bytesused:1;
576
+	unsigned int		   quirk_poll_must_check_waiting_for_buffers:1;
577
+	unsigned int			supports_requests:1;
578
+	unsigned int			requires_requests:1;
579
+	unsigned int			uses_qbuf:1;
580
+	unsigned int			uses_requests:1;
528581 	unsigned int			allow_cache_hints:1;
529582 
530583 	struct mutex			*lock;
....@@ -535,6 +588,7 @@
535588 	const struct vb2_buf_ops	*buf_ops;
536589 
537590 	void				*drv_priv;
591
+	u32				subsystem_flags;
538592 	unsigned int			buf_struct_size;
539593 	u32				timestamp_flags;
540594 	gfp_t				gfp_flags;
....@@ -569,6 +623,8 @@
569623 
570624 	struct vb2_fileio_data		*fileio;
571625 	struct vb2_threadio_data	*threadio;
626
+
627
+	char				name[32];
572628 
573629 #ifdef CONFIG_VIDEO_ADV_DEBUG
574630 	/*
....@@ -626,9 +682,7 @@
626682  * @state:	state of the buffer, as defined by &enum vb2_buffer_state.
627683  *		Either %VB2_BUF_STATE_DONE if the operation finished
628684  *		successfully, %VB2_BUF_STATE_ERROR if the operation finished
629
- *		with an error or any of %VB2_BUF_STATE_QUEUED or
630
- *		%VB2_BUF_STATE_REQUEUEING if the driver wants to
631
- *		requeue buffers (see below).
685
+ *		with an error or %VB2_BUF_STATE_QUEUED.
632686  *
633687  * This function should be called by the driver after a hardware operation on
634688  * a buffer is finished and the buffer may be returned to userspace. The driver
....@@ -639,12 +693,7 @@
639693  * While streaming a buffer can only be returned in state DONE or ERROR.
640694  * The &vb2_ops->start_streaming op can also return them in case the DMA engine
641695  * cannot be started for some reason. In that case the buffers should be
642
- * returned with state QUEUED or REQUEUEING to put them back into the queue.
643
- *
644
- * %VB2_BUF_STATE_REQUEUEING is like %VB2_BUF_STATE_QUEUED, but it also calls
645
- * &vb2_ops->buf_queue to queue buffers back to the driver. Note that calling
646
- * vb2_buffer_done(..., VB2_BUF_STATE_REQUEUEING) from interrupt context will
647
- * result in &vb2_ops->buf_queue being called in interrupt context as well.
696
+ * returned with state QUEUED to put them back into the queue.
648697  */
649698 void vb2_buffer_done(struct vb2_buffer *vb, enum vb2_buffer_state state);
650699 
....@@ -719,7 +768,7 @@
719768  * Return: returns zero on success; an error code otherwise.
720769  */
721770 int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
722
-		unsigned int *count);
771
+		    unsigned int *count);
723772 
724773 /**
725774  * vb2_core_create_bufs() - Allocate buffers and any required auxiliary structs
....@@ -742,7 +791,8 @@
742791  * Return: returns zero on success; an error code otherwise.
743792  */
744793 int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
745
-			 unsigned int *count, unsigned int requested_planes,
794
+			 unsigned int *count,
795
+			 unsigned int requested_planes,
746796 			 const unsigned int requested_sizes[]);
747797 
748798 /**
....@@ -774,12 +824,17 @@
774824  * @index:	id number of the buffer
775825  * @pb:		buffer structure passed from userspace to
776826  *		v4l2_ioctl_ops->vidioc_qbuf handler in driver
827
+ * @req:	pointer to &struct media_request, may be NULL.
777828  *
778829  * Videobuf2 core helper to implement VIDIOC_QBUF() operation. It is called
779830  * internally by VB2 by an API-specific handler, like ``videobuf2-v4l2.h``.
780831  *
781832  * This function:
782833  *
834
+ * #) If @req is non-NULL, then the buffer will be bound to this
835
+ *    media request and it returns. The buffer will be prepared and
836
+ *    queued to the driver (i.e. the next two steps) when the request
837
+ *    itself is queued.
783838  * #) if necessary, calls &vb2_ops->buf_prepare callback in the driver
784839  *    (if provided), in which driver-specific buffer initialization can
785840  *    be performed;
....@@ -788,7 +843,8 @@
788843  *
789844  * Return: returns zero on success; an error code otherwise.
790845  */
791
-int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb);
846
+int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb,
847
+		  struct media_request *req);
792848 
793849 /**
794850  * vb2_core_dqbuf() - Dequeue a buffer to the userspace
....@@ -1121,6 +1177,22 @@
11211177 	return 0;
11221178 }
11231179 
1180
+#if defined(CONFIG_ARCH_ROCKCHIP) && IS_ENABLED(CONFIG_USB_F_UVC)
1181
+/**
1182
+ * vb2_plane_data_offset() - return plane data_offset in bytes.
1183
+ * @vb:		pointer to &struct vb2_buffer to which the plane in
1184
+ *		question belongs to.
1185
+ * @plane_no:	plane number for which size should be returned.
1186
+ */
1187
+static inline unsigned long
1188
+vb2_plane_data_offset(struct vb2_buffer *vb, unsigned int plane_no)
1189
+{
1190
+	if (plane_no < vb->num_planes)
1191
+		return vb->planes[plane_no].data_offset;
1192
+	return 0;
1193
+}
1194
+#endif
1195
+
11241196 /**
11251197  * vb2_start_streaming_called() - return streaming status of driver.
11261198  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
....@@ -1137,6 +1209,24 @@
11371209 static inline void vb2_clear_last_buffer_dequeued(struct vb2_queue *q)
11381210 {
11391211 	q->last_buffer_dequeued = false;
1212
+}
1213
+
1214
+/**
1215
+ * vb2_get_buffer() - get a buffer from a queue
1216
+ * @q:		pointer to &struct vb2_queue with videobuf2 queue.
1217
+ * @index:	buffer index
1218
+ *
1219
+ * This function obtains a buffer from a queue, by its index.
1220
+ * Keep in mind that there is no refcounting involved in this
1221
+ * operation, so the buffer lifetime should be taken into
1222
+ * consideration.
1223
+ */
1224
+static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q,
1225
+						unsigned int index)
1226
+{
1227
+	if (index < q->num_buffers)
1228
+		return q->bufs[index];
1229
+	return NULL;
11401230 }
11411231 
11421232 /*
....@@ -1165,4 +1255,19 @@
11651255  */
11661256 int vb2_verify_memory_type(struct vb2_queue *q,
11671257 		enum vb2_memory memory, unsigned int type);
1258
+
1259
+/**
1260
+ * vb2_request_object_is_buffer() - return true if the object is a buffer
1261
+ *
1262
+ * @obj:	the request object.
1263
+ */
1264
+bool vb2_request_object_is_buffer(struct media_request_object *obj);
1265
+
1266
+/**
1267
+ * vb2_request_buffer_cnt() - return the number of buffers in the request
1268
+ *
1269
+ * @req:	the request.
1270
+ */
1271
+unsigned int vb2_request_buffer_cnt(struct media_request *req);
1272
+
11681273 #endif /* _MEDIA_VIDEOBUF2_CORE_H */