[v18,6/9] media: core: Free range of buffers

Message ID	20240126110141.135896-7-benjamin.gaignard@collabora.com (mailing list archive)
State	New, archived
Headers	show Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA08E175A1; Fri, 26 Jan 2024 11:01:51 +0000 (UTC) sender: benjamin.gaignard) by madrid.collaboradmins.com (Postfix) with ESMTPSA id A8713378208A; Fri, 26 Jan 2024 11:01:49 +0000 (UTC) From: Benjamin Gaignard <benjamin.gaignard@collabora.com> To: hverkuil@xs4all.nl, mchehab@kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard <benjamin.gaignard@collabora.com> Subject: [PATCH v18 6/9] media: core: Free range of buffers Date: Fri, 26 Jan 2024 12:01:38 +0100 Message-Id: <20240126110141.135896-7-benjamin.gaignard@collabora.com> In-Reply-To: <20240126110141.135896-1-benjamin.gaignard@collabora.com> References: <20240126110141.135896-1-benjamin.gaignard@collabora.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Add DELETE_BUF ioctl \| expand [v18,0/9] Add DELETE_BUF ioctl [v18,1/9] media: videobuf2: Update vb2_is_busy() logic [v18,2/9] videobuf2: Add min_reqbufs_allocation field to vb2_queue structure [v18,3/9] media: test-drivers: Set REQBUFS minimum number of buffers [v18,4/9] media: core: Rework how create_buf index returned value is computed [v18,5/9] media: core: Add bitmap manage bufs array entries [v18,6/9] media: core: Free range of buffers [v18,7/9] media: v4l2: Add DELETE_BUFS ioctl [v18,8/9] media: v4l2: Add mem2mem helpers for DELETE_BUFS ioctl [v18,9/9] media: verisilicon: Support deleting buffers on capture queue

Message ID

20240126110141.135896-7-benjamin.gaignard@collabora.com (mailing list archive)

State

New, archived

Headers

From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
To: hverkuil@xs4all.nl,
	mchehab@kernel.org
Cc: linux-kernel@vger.kernel.org,
	linux-media@vger.kernel.org,
	kernel@collabora.com,
	Benjamin Gaignard <benjamin.gaignard@collabora.com>
Subject: [PATCH v18 6/9] media: core: Free range of buffers
Date: Fri, 26 Jan 2024 12:01:38 +0100
Message-Id: <20240126110141.135896-7-benjamin.gaignard@collabora.com>
In-Reply-To: <20240126110141.135896-1-benjamin.gaignard@collabora.com>
References: <20240126110141.135896-1-benjamin.gaignard@collabora.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

Series

Add DELETE_BUF ioctl | expand

Commit Message

Benjamin Gaignard Jan. 26, 2024, 11:01 a.m. UTC

Improve __vb2_queue_free() and __vb2_free_mem() to free
range of buffers and not only the last few buffers.
Intoduce starting index to be flexible on range and change the loops
according to this parameters.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
 .../media/common/videobuf2/videobuf2-core.c   | 56 +++++++++----------
 1 file changed, 26 insertions(+), 30 deletions(-)

Comments

Hans Verkuil Feb. 5, 2024, 2:15 p.m. UTC | #1

On 26/01/2024 12:01, Benjamin Gaignard wrote:
> Improve __vb2_queue_free() and __vb2_free_mem() to free
> range of buffers and not only the last few buffers.
> Intoduce starting index to be flexible on range and change the loops

Intoduce -> Introduce

> according to this parameters.

parameters -> parameter

> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> ---
>  .../media/common/videobuf2/videobuf2-core.c   | 56 +++++++++----------
>  1 file changed, 26 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
> index 1506fbe8fc76..8486a2f2c09d 100644
> --- a/drivers/media/common/videobuf2/videobuf2-core.c
> +++ b/drivers/media/common/videobuf2/videobuf2-core.c
> @@ -540,17 +540,16 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
>  }
>  
>  /*
> - * __vb2_free_mem() - release all video buffer memory for a given queue
> + * __vb2_free_mem() - release video buffer memory for a given range of
> + * buffers in a given queue
>   */
> -static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
> +static void __vb2_free_mem(struct vb2_queue *q, unsigned int start, unsigned int count)
>  {
> -	unsigned int buffer;
> +	unsigned int i;
>  	struct vb2_buffer *vb;
> -	unsigned int q_num_buffers = vb2_get_num_buffers(q);
>  
> -	for (buffer = q_num_buffers - buffers; buffer < q_num_buffers;
> -	     ++buffer) {
> -		vb = vb2_get_buffer(q, buffer);
> +	for (i = start; i < start + count; i++) {
> +		vb = vb2_get_buffer(q, i);
>  		if (!vb)
>  			continue;
>  
> @@ -565,35 +564,33 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
>  }
>  
>  /*
> - * __vb2_queue_free() - free buffers at the end of the queue - video memory and
> + * __vb2_queue_free() - free @count buffers from @start index of the queue - video memory and
>   * related information, if no buffers are left return the queue to an
>   * uninitialized state. Might be called even if the queue has already been freed.
>   */
> -static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
> +static void __vb2_queue_free(struct vb2_queue *q, unsigned int start, unsigned int count)
>  {
> -	unsigned int buffer;
> -	unsigned int q_num_buffers = vb2_get_num_buffers(q);
> +	unsigned int i;
>  
>  	lockdep_assert_held(&q->mmap_lock);
>  
>  	/* Call driver-provided cleanup function for each buffer, if provided */
> -	for (buffer = q_num_buffers - buffers; buffer < q_num_buffers;
> -	     ++buffer) {
> -		struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
> +	for (i = start; i < start + count; i++) {
> +		struct vb2_buffer *vb = vb2_get_buffer(q, i);
>  
>  		if (vb && vb->planes[0].mem_priv)
>  			call_void_vb_qop(vb, buf_cleanup, vb);
>  	}
>  
>  	/* Release video buffer memory */
> -	__vb2_free_mem(q, buffers);
> +	__vb2_free_mem(q, start, count);
>  
>  #ifdef CONFIG_VIDEO_ADV_DEBUG
>  	/*
>  	 * Check that all the calls were balanced during the life-time of this
>  	 * queue. If not then dump the counters to the kernel log.
>  	 */
> -	if (q_num_buffers) {
> +	if (vb2_get_num_buffers(q)) {
>  		bool unbalanced = q->cnt_start_streaming != q->cnt_stop_streaming ||
>  				  q->cnt_prepare_streaming != q->cnt_unprepare_streaming ||
>  				  q->cnt_wait_prepare != q->cnt_wait_finish;
> @@ -619,8 +616,8 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
>  		q->cnt_stop_streaming = 0;
>  		q->cnt_unprepare_streaming = 0;
>  	}
> -	for (buffer = 0; buffer < vb2_get_num_buffers(q); buffer++) {
> -		struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
> +	for (i = start; i < start + count; i++) {
> +		struct vb2_buffer *vb = vb2_get_buffer(q, i);
>  		bool unbalanced;
>  
>  		if (!vb)
> @@ -637,7 +634,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
>  
>  		if (unbalanced) {
>  			pr_info("unbalanced counters for queue %p, buffer %d:\n",
> -				q, buffer);
> +				q, i);
>  			if (vb->cnt_buf_init != vb->cnt_buf_cleanup)
>  				pr_info("     buf_init: %u buf_cleanup: %u\n",
>  					vb->cnt_buf_init, vb->cnt_buf_cleanup);
> @@ -671,9 +668,8 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
>  #endif
>  
>  	/* Free vb2 buffers */
> -	for (buffer = q_num_buffers - buffers; buffer < q_num_buffers;
> -	     ++buffer) {
> -		struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
> +	for (i = start; i < start + count; i++) {
> +		struct vb2_buffer *vb = vb2_get_buffer(q, i);
>  
>  		if (!vb)
>  			continue;
> @@ -713,7 +709,7 @@ EXPORT_SYMBOL(vb2_buffer_in_use);
>  static bool __buffers_in_use(struct vb2_queue *q)
>  {
>  	unsigned int buffer;
> -	for (buffer = 0; buffer < vb2_get_num_buffers(q); ++buffer) {
> +	for (buffer = 0; buffer < q->max_num_buffers; ++buffer) {
>  		struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
>  
>  		if (!vb)
> @@ -899,7 +895,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
>  		 * queued without ever calling STREAMON.
>  		 */
>  		__vb2_queue_cancel(q);
> -		__vb2_queue_free(q, q_num_bufs);
> +		__vb2_queue_free(q, 0, q->max_num_buffers);
>  		mutex_unlock(&q->mmap_lock);
>  
>  		/*
> @@ -1002,7 +998,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
>  		 * from already queued buffers and it will reset q->memory to
>  		 * VB2_MEMORY_UNKNOWN.
>  		 */
> -		__vb2_queue_free(q, allocated_buffers);
> +		__vb2_queue_free(q, first_index, allocated_buffers);
>  		mutex_unlock(&q->mmap_lock);
>  		return ret;
>  	}
> @@ -1127,7 +1123,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
>  		 * from already queued buffers and it will reset q->memory to
>  		 * VB2_MEMORY_UNKNOWN.
>  		 */
> -		__vb2_queue_free(q, allocated_buffers);
> +		__vb2_queue_free(q, *first_index, allocated_buffers);
>  		mutex_unlock(&q->mmap_lock);
>  		return -ENOMEM;
>  	}
> @@ -1742,7 +1738,7 @@ static int vb2_start_streaming(struct vb2_queue *q)
>  		 * Forcefully reclaim buffers if the driver did not
>  		 * correctly return them to vb2.
>  		 */
> -		for (i = 0; i < vb2_get_num_buffers(q); ++i) {
> +		for (i = 0; i < q->max_num_buffers; ++i) {
>  			vb = vb2_get_buffer(q, i);
>  
>  			if (!vb)
> @@ -2148,7 +2144,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q)
>  	 * to vb2 in stop_streaming().
>  	 */
>  	if (WARN_ON(atomic_read(&q->owned_by_drv_count))) {
> -		for (i = 0; i < vb2_get_num_buffers(q); i++) {
> +		for (i = 0; i < q->max_num_buffers; i++) {
>  			struct vb2_buffer *vb = vb2_get_buffer(q, i);
>  
>  			if (!vb)
> @@ -2192,7 +2188,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q)
>  	 * call to __fill_user_buffer() after buf_finish(). That order can't
>  	 * be changed, so we can't move the buf_finish() to __vb2_dqbuf().
>  	 */
> -	for (i = 0; i < vb2_get_num_buffers(q); i++) {
> +	for (i = 0; i < q->max_num_buffers; i++) {
>  		struct vb2_buffer *vb;
>  		struct media_request *req;
>  
> @@ -2619,7 +2615,7 @@ void vb2_core_queue_release(struct vb2_queue *q)
>  	__vb2_cleanup_fileio(q);
>  	__vb2_queue_cancel(q);
>  	mutex_lock(&q->mmap_lock);
> -	__vb2_queue_free(q, vb2_get_num_buffers(q));
> +	__vb2_queue_free(q, 0, q->max_num_buffers);
>  	vb2_core_free_buffers_storage(q);
>  	mutex_unlock(&q->mmap_lock);
>  }

Regards,

	Hans

diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 1506fbe8fc76..8486a2f2c09d 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -540,17 +540,16 @@  static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory,
 }
 
 /*
- * __vb2_free_mem() - release all video buffer memory for a given queue
+ * __vb2_free_mem() - release video buffer memory for a given range of
+ * buffers in a given queue
  */
-static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
+static void __vb2_free_mem(struct vb2_queue *q, unsigned int start, unsigned int count)
 {
-	unsigned int buffer;
+	unsigned int i;
 	struct vb2_buffer *vb;
-	unsigned int q_num_buffers = vb2_get_num_buffers(q);
 
-	for (buffer = q_num_buffers - buffers; buffer < q_num_buffers;
-	     ++buffer) {
-		vb = vb2_get_buffer(q, buffer);
+	for (i = start; i < start + count; i++) {
+		vb = vb2_get_buffer(q, i);
 		if (!vb)
 			continue;
 
@@ -565,35 +564,33 @@  static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
 }
 
 /*
- * __vb2_queue_free() - free buffers at the end of the queue - video memory and
+ * __vb2_queue_free() - free @count buffers from @start index of the queue - video memory and
  * related information, if no buffers are left return the queue to an
  * uninitialized state. Might be called even if the queue has already been freed.
  */
-static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
+static void __vb2_queue_free(struct vb2_queue *q, unsigned int start, unsigned int count)
 {
-	unsigned int buffer;
-	unsigned int q_num_buffers = vb2_get_num_buffers(q);
+	unsigned int i;
 
 	lockdep_assert_held(&q->mmap_lock);
 
 	/* Call driver-provided cleanup function for each buffer, if provided */
-	for (buffer = q_num_buffers - buffers; buffer < q_num_buffers;
-	     ++buffer) {
-		struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
+	for (i = start; i < start + count; i++) {
+		struct vb2_buffer *vb = vb2_get_buffer(q, i);
 
 		if (vb && vb->planes[0].mem_priv)
 			call_void_vb_qop(vb, buf_cleanup, vb);
 	}
 
 	/* Release video buffer memory */
-	__vb2_free_mem(q, buffers);
+	__vb2_free_mem(q, start, count);
 
 #ifdef CONFIG_VIDEO_ADV_DEBUG
 	/*
 	 * Check that all the calls were balanced during the life-time of this
 	 * queue. If not then dump the counters to the kernel log.
 	 */
-	if (q_num_buffers) {
+	if (vb2_get_num_buffers(q)) {
 		bool unbalanced = q->cnt_start_streaming != q->cnt_stop_streaming ||
 				  q->cnt_prepare_streaming != q->cnt_unprepare_streaming ||
 				  q->cnt_wait_prepare != q->cnt_wait_finish;
@@ -619,8 +616,8 @@  static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
 		q->cnt_stop_streaming = 0;
 		q->cnt_unprepare_streaming = 0;
 	}
-	for (buffer = 0; buffer < vb2_get_num_buffers(q); buffer++) {
-		struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
+	for (i = start; i < start + count; i++) {
+		struct vb2_buffer *vb = vb2_get_buffer(q, i);
 		bool unbalanced;
 
 		if (!vb)
@@ -637,7 +634,7 @@  static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
 
 		if (unbalanced) {
 			pr_info("unbalanced counters for queue %p, buffer %d:\n",
-				q, buffer);
+				q, i);
 			if (vb->cnt_buf_init != vb->cnt_buf_cleanup)
 				pr_info("     buf_init: %u buf_cleanup: %u\n",
 					vb->cnt_buf_init, vb->cnt_buf_cleanup);
@@ -671,9 +668,8 @@  static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
 #endif
 
 	/* Free vb2 buffers */
-	for (buffer = q_num_buffers - buffers; buffer < q_num_buffers;
-	     ++buffer) {
-		struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
+	for (i = start; i < start + count; i++) {
+		struct vb2_buffer *vb = vb2_get_buffer(q, i);
 
 		if (!vb)
 			continue;
@@ -713,7 +709,7 @@  EXPORT_SYMBOL(vb2_buffer_in_use);
 static bool __buffers_in_use(struct vb2_queue *q)
 {
 	unsigned int buffer;
-	for (buffer = 0; buffer < vb2_get_num_buffers(q); ++buffer) {
+	for (buffer = 0; buffer < q->max_num_buffers; ++buffer) {
 		struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
 
 		if (!vb)
@@ -899,7 +895,7 @@  int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
 		 * queued without ever calling STREAMON.
 		 */
 		__vb2_queue_cancel(q);
-		__vb2_queue_free(q, q_num_bufs);
+		__vb2_queue_free(q, 0, q->max_num_buffers);
 		mutex_unlock(&q->mmap_lock);
 
 		/*
@@ -1002,7 +998,7 @@  int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
 		 * from already queued buffers and it will reset q->memory to
 		 * VB2_MEMORY_UNKNOWN.
 		 */
-		__vb2_queue_free(q, allocated_buffers);
+		__vb2_queue_free(q, first_index, allocated_buffers);
 		mutex_unlock(&q->mmap_lock);
 		return ret;
 	}
@@ -1127,7 +1123,7 @@  int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
 		 * from already queued buffers and it will reset q->memory to
 		 * VB2_MEMORY_UNKNOWN.
 		 */
-		__vb2_queue_free(q, allocated_buffers);
+		__vb2_queue_free(q, *first_index, allocated_buffers);
 		mutex_unlock(&q->mmap_lock);
 		return -ENOMEM;
 	}
@@ -1742,7 +1738,7 @@  static int vb2_start_streaming(struct vb2_queue *q)
 		 * Forcefully reclaim buffers if the driver did not
 		 * correctly return them to vb2.
 		 */
-		for (i = 0; i < vb2_get_num_buffers(q); ++i) {
+		for (i = 0; i < q->max_num_buffers; ++i) {
 			vb = vb2_get_buffer(q, i);
 
 			if (!vb)
@@ -2148,7 +2144,7 @@  static void __vb2_queue_cancel(struct vb2_queue *q)
 	 * to vb2 in stop_streaming().
 	 */
 	if (WARN_ON(atomic_read(&q->owned_by_drv_count))) {
-		for (i = 0; i < vb2_get_num_buffers(q); i++) {
+		for (i = 0; i < q->max_num_buffers; i++) {
 			struct vb2_buffer *vb = vb2_get_buffer(q, i);
 
 			if (!vb)
@@ -2192,7 +2188,7 @@  static void __vb2_queue_cancel(struct vb2_queue *q)
 	 * call to __fill_user_buffer() after buf_finish(). That order can't
 	 * be changed, so we can't move the buf_finish() to __vb2_dqbuf().
 	 */
-	for (i = 0; i < vb2_get_num_buffers(q); i++) {
+	for (i = 0; i < q->max_num_buffers; i++) {
 		struct vb2_buffer *vb;
 		struct media_request *req;
 
@@ -2619,7 +2615,7 @@  void vb2_core_queue_release(struct vb2_queue *q)
 	__vb2_cleanup_fileio(q);
 	__vb2_queue_cancel(q);
 	mutex_lock(&q->mmap_lock);
-	__vb2_queue_free(q, vb2_get_num_buffers(q));
+	__vb2_queue_free(q, 0, q->max_num_buffers);
 	vb2_core_free_buffers_storage(q);
 	mutex_unlock(&q->mmap_lock);
 }

[v18,6/9] media: core: Free range of buffers

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