From 4dbe7eab95809ada25312a3c67bda0697040bbb0 Mon Sep 17 00:00:00 2001 From: Sergey Senozhatsky Date: Thu, 9 Sep 2021 13:24:24 +0200 Subject: [PATCH] media: videobuf2: inverse buffer cache_hints flags It would be less error prone if the default cache hints value (we kzalloc() structs, so it's zeroed out by default) would be to "always sync/flush" caches. Inverse and rename cache hints flags. Signed-off-by: Sergey Senozhatsky Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/common/videobuf2/videobuf2-core.c | 31 ++++++++----------------- drivers/media/common/videobuf2/videobuf2-v4l2.c | 17 ++++---------- include/media/videobuf2-core.h | 12 +++++----- 3 files changed, 21 insertions(+), 39 deletions(-) diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index c4ff356da600..9d57df348b5f 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -327,12 +327,12 @@ static void __vb2_buf_mem_prepare(struct vb2_buffer *vb) if (vb->synced) return; - if (vb->need_cache_sync_on_prepare) { - for (plane = 0; plane < vb->num_planes; ++plane) - call_void_memop(vb, prepare, - vb->planes[plane].mem_priv); - } vb->synced = 1; + if (vb->skip_cache_sync_on_prepare) + return; + + for (plane = 0; plane < vb->num_planes; ++plane) + call_void_memop(vb, prepare, vb->planes[plane].mem_priv); } /* @@ -346,12 +346,12 @@ static void __vb2_buf_mem_finish(struct vb2_buffer *vb) if (!vb->synced) return; - if (vb->need_cache_sync_on_finish) { - for (plane = 0; plane < vb->num_planes; ++plane) - call_void_memop(vb, finish, - vb->planes[plane].mem_priv); - } vb->synced = 0; + if (vb->skip_cache_sync_on_finish) + return; + + for (plane = 0; plane < vb->num_planes; ++plane) + call_void_memop(vb, finish, vb->planes[plane].mem_priv); } /* @@ -415,17 +415,6 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, vb->index = q->num_buffers + buffer; vb->type = q->type; vb->memory = memory; - /* - * We need to set these flags here so that the videobuf2 core - * will call ->prepare()/->finish() cache sync/flush on vb2 - * buffers when appropriate. However, we can avoid explicit - * ->prepare() and ->finish() cache sync for DMABUF buffers, - * because DMA exporter takes care of it. - */ - if (q->memory != VB2_MEMORY_DMABUF) { - vb->need_cache_sync_on_prepare = 1; - vb->need_cache_sync_on_finish = 1; - } for (plane = 0; plane < num_planes; ++plane) { vb->planes[plane].length = plane_sizes[plane]; vb->planes[plane].min_length = plane_sizes[plane]; diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index 2988bb38ceb1..454d58268602 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -351,18 +351,11 @@ static void set_buffer_cache_hints(struct vb2_queue *q, * we always need ->prepare() or/and ->finish() cache sync. */ if (q->memory == VB2_MEMORY_DMABUF) { - vb->need_cache_sync_on_finish = 0; - vb->need_cache_sync_on_prepare = 0; + vb->skip_cache_sync_on_finish = 1; + vb->skip_cache_sync_on_prepare = 1; return; } - /* - * Cache sync/invalidation flags are set by default in order to - * preserve existing behaviour for old apps/drivers. - */ - vb->need_cache_sync_on_prepare = 1; - vb->need_cache_sync_on_finish = 1; - if (!vb2_queue_allows_cache_hints(q)) { /* * Clear buffer cache flags if queue does not support user @@ -379,13 +372,13 @@ static void set_buffer_cache_hints(struct vb2_queue *q, * TO_DEVICE. */ if (q->dma_dir == DMA_TO_DEVICE) - vb->need_cache_sync_on_finish = 0; + vb->skip_cache_sync_on_finish = 1; if (b->flags & V4L2_BUF_FLAG_NO_CACHE_INVALIDATE) - vb->need_cache_sync_on_finish = 0; + vb->skip_cache_sync_on_finish = 1; if (b->flags & V4L2_BUF_FLAG_NO_CACHE_CLEAN) - vb->need_cache_sync_on_prepare = 0; + vb->skip_cache_sync_on_prepare = 1; } static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *mdev, diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 3b5986cee073..66e548268242 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -267,10 +267,10 @@ struct vb2_buffer { * after the 'buf_finish' op is called. * copied_timestamp: the timestamp of this capture buffer was copied * from an output buffer. - * need_cache_sync_on_prepare: when set buffer's ->prepare() function - * performs cache sync/invalidation. - * need_cache_sync_on_finish: when set buffer's ->finish() function - * performs cache sync/invalidation. + * skip_cache_sync_on_prepare: when set buffer's ->prepare() function + * skips cache sync/invalidation. + * skip_cache_sync_on_finish: when set buffer's ->finish() function + * skips cache sync/invalidation. * queued_entry: entry on the queued buffers list, which holds * all buffers queued from userspace * done_entry: entry on the list that stores all buffers ready @@ -281,8 +281,8 @@ struct vb2_buffer { unsigned int synced:1; unsigned int prepared:1; unsigned int copied_timestamp:1; - unsigned int need_cache_sync_on_prepare:1; - unsigned int need_cache_sync_on_finish:1; + unsigned int skip_cache_sync_on_prepare:1; + unsigned int skip_cache_sync_on_finish:1; struct vb2_plane planes[VB2_MAX_PLANES]; struct list_head queued_entry; -- 2.11.0