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Message-Id: <20231002120617.119602-51-benjamin.gaignard@collabora.com>
Date: Mon, 2 Oct 2023 14:06:14 +0200
From: Benjamin Gaignard <benjamin.gaignard@...labora.com>
To: mchehab@...nel.org, tfiga@...omium.org, m.szyprowski@...sung.com,
ming.qian@....com, ezequiel@...guardiasur.com.ar,
p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
hverkuil-cisco@...all.nl, nicolas.dufresne@...labora.com
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
kernel@...labora.com,
Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [PATCH v9 50/53] media: core: Free range of buffers
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@...labora.com>
---
version 9:
- fix compilation issue
.../media/common/videobuf2/videobuf2-core.c | 40 ++++++++-----------
1 file changed, 17 insertions(+), 23 deletions(-)
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 4cbc17e8b53e..b9b8a44b378c 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -515,13 +515,12 @@ 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
*/
-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 = 0;
- long i = q->max_num_buffers;
+ unsigned int i;
struct vb2_buffer *vb;
- for (i = q->max_num_buffers; i >= 0 && buffer < buffers; i--) {
+ for (i = start; i < q->max_num_buffers && i < start + count; i++) {
vb = vb2_get_buffer(q, i);
if (!vb)
continue;
@@ -533,36 +532,32 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers)
__vb2_buf_dmabuf_put(vb);
else
__vb2_buf_userptr_put(vb);
- buffer++;
}
}
/*
- * __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;
- long i = q->max_num_buffers;
+ unsigned int i;
lockdep_assert_held(&q->mmap_lock);
/* Call driver-provided cleanup function for each buffer, if provided */
- for (i = q->max_num_buffers, buffer = 0; i >= 0 && buffer < buffers; i--) {
+ for (i = start; i < q->max_num_buffers && i < start + count; i++) {
struct vb2_buffer *vb = vb2_get_buffer(q, i);
if (!vb)
continue;
- if (vb->planes[0].mem_priv) {
+ if (vb->planes[0].mem_priv)
call_void_vb_qop(vb, buf_cleanup, vb);
- buffer++;
- }
}
/* Release video buffer memory */
- __vb2_free_mem(q, buffers);
+ __vb2_free_mem(q, start, count);
#ifdef CONFIG_VIDEO_ADV_DEBUG
/*
@@ -595,8 +590,8 @@ 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 < q->max_num_buffers; buffer++) {
- struct vb2_buffer *vb = vb2_get_buffer(q, buffer);
+ for (i = 0; i < q->max_num_buffers; i++) {
+ struct vb2_buffer *vb = vb2_get_buffer(q, i);
bool unbalanced;
if (!vb)
@@ -613,7 +608,7 @@ 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);
@@ -647,7 +642,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
#endif
/* Free vb2 buffers */
- for (i = q->max_num_buffers, buffer = 0; i >= 0 && buffer < buffers; i--) {
+ for (i = start; i < q->max_num_buffers && i < start + count; i++) {
struct vb2_buffer *vb = vb2_get_buffer(q, i);
if (!vb)
@@ -655,7 +650,6 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
vb2_queue_remove_buffer(vb);
kfree(vb);
- buffer++;
}
if (!vb2_get_num_buffers(q)) {
@@ -849,7 +843,7 @@ 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_num_bufs);
mutex_unlock(&q->mmap_lock);
/*
@@ -959,7 +953,7 @@ 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;
}
@@ -1099,7 +1093,7 @@ 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;
}
@@ -2565,7 +2559,7 @@ 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, q->max_num_buffers);
+ __vb2_queue_free(q, 0, q->max_num_buffers);
kfree(q->bufs);
q->bufs = NULL;
bitmap_free(q->bufs_bitmap);
--
2.39.2
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