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authorSergey Senozhatsky <senozhatsky@chromium.org>2020-05-14 18:01:44 +0200
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2020-06-23 13:31:12 +0200
commit7b4b45555c79db03dad8192e6ef85cb30236827b (patch)
treebdc5431173c02ba1f8e8aba76313d84c76655e8a /drivers/media/common
parentac53503ee38a1ffbc47c7cca6cbfc48ba9c65c5e (diff)
media: videobuf2: add queue memory consistency parameter
Preparations for future V4L2_FLAG_MEMORY_NON_CONSISTENT support. Extend vb2_core_reqbufs() parameters list to accept requests' ->flags, which will be used for memory consistency configuration. An attempt to allocate a buffer with consistency requirements which don't match queue's consistency model will fail. Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/common')
-rw-r--r--drivers/media/common/videobuf2/videobuf2-core.c51
-rw-r--r--drivers/media/common/videobuf2/videobuf2-v4l2.c6
2 files changed, 44 insertions, 13 deletions
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c
index 44d65f5be845..0fdcf90330df 100644
--- a/drivers/media/common/videobuf2/videobuf2-core.c
+++ b/drivers/media/common/videobuf2/videobuf2-core.c
@@ -664,11 +664,33 @@ int vb2_verify_memory_type(struct vb2_queue *q,
}
EXPORT_SYMBOL(vb2_verify_memory_type);
+static void set_queue_consistency(struct vb2_queue *q, bool consistent_mem)
+{
+ q->dma_attrs &= ~DMA_ATTR_NON_CONSISTENT;
+
+ if (!vb2_queue_allows_cache_hints(q))
+ return;
+ if (!consistent_mem)
+ q->dma_attrs |= DMA_ATTR_NON_CONSISTENT;
+}
+
+static bool verify_consistency_attr(struct vb2_queue *q, bool consistent_mem)
+{
+ bool queue_is_consistent = !(q->dma_attrs & DMA_ATTR_NON_CONSISTENT);
+
+ if (consistent_mem != queue_is_consistent) {
+ dprintk(1, "memory consistency model mismatch\n");
+ return false;
+ }
+ return true;
+}
+
int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
- unsigned int *count)
+ unsigned int flags, unsigned int *count)
{
unsigned int num_buffers, allocated_buffers, num_planes = 0;
unsigned plane_sizes[VB2_MAX_PLANES] = { };
+ bool consistent_mem = true;
unsigned int i;
int ret;
@@ -683,7 +705,8 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
}
if (*count == 0 || q->num_buffers != 0 ||
- (q->memory != VB2_MEMORY_UNKNOWN && q->memory != memory)) {
+ (q->memory != VB2_MEMORY_UNKNOWN && q->memory != memory) ||
+ !verify_consistency_attr(q, consistent_mem)) {
/*
* We already have buffers allocated, so first check if they
* are not in use and can be freed.
@@ -720,6 +743,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
num_buffers = min_t(unsigned int, num_buffers, VB2_MAX_FRAME);
memset(q->alloc_devs, 0, sizeof(q->alloc_devs));
q->memory = memory;
+ set_queue_consistency(q, consistent_mem);
/*
* Ask the driver how many buffers and planes per buffer it requires.
@@ -804,11 +828,13 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory,
EXPORT_SYMBOL_GPL(vb2_core_reqbufs);
int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
- unsigned int *count, unsigned requested_planes,
- const unsigned requested_sizes[])
+ unsigned int flags, unsigned int *count,
+ unsigned int requested_planes,
+ const unsigned int requested_sizes[])
{
unsigned int num_planes = 0, num_buffers, allocated_buffers;
unsigned plane_sizes[VB2_MAX_PLANES] = { };
+ bool consistent_mem = true;
int ret;
if (q->num_buffers == VB2_MAX_FRAME) {
@@ -823,10 +849,15 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
}
memset(q->alloc_devs, 0, sizeof(q->alloc_devs));
q->memory = memory;
+ set_queue_consistency(q, consistent_mem);
q->waiting_for_buffers = !q->is_output;
- } else if (q->memory != memory) {
- dprintk(1, "memory model mismatch\n");
- return -EINVAL;
+ } else {
+ if (q->memory != memory) {
+ dprintk(1, "memory model mismatch\n");
+ return -EINVAL;
+ }
+ if (!verify_consistency_attr(q, consistent_mem))
+ return -EINVAL;
}
num_buffers = min(*count, VB2_MAX_FRAME - q->num_buffers);
@@ -2498,7 +2529,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
fileio->memory = VB2_MEMORY_MMAP;
fileio->type = q->type;
q->fileio = fileio;
- ret = vb2_core_reqbufs(q, fileio->memory, &fileio->count);
+ ret = vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count);
if (ret)
goto err_kfree;
@@ -2555,7 +2586,7 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read)
err_reqbufs:
fileio->count = 0;
- vb2_core_reqbufs(q, fileio->memory, &fileio->count);
+ vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count);
err_kfree:
q->fileio = NULL;
@@ -2575,7 +2606,7 @@ static int __vb2_cleanup_fileio(struct vb2_queue *q)
vb2_core_streamoff(q, q->type);
q->fileio = NULL;
fileio->count = 0;
- vb2_core_reqbufs(q, fileio->memory, &fileio->count);
+ vb2_core_reqbufs(q, fileio->memory, 0, &fileio->count);
kfree(fileio);
dprintk(3, "file io emulator closed\n");
}
diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
index e4b4354b42b8..26a3ec333bb7 100644
--- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
+++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
@@ -723,7 +723,7 @@ int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
int ret = vb2_verify_memory_type(q, req->memory, req->type);
fill_buf_caps(q, &req->capabilities);
- return ret ? ret : vb2_core_reqbufs(q, req->memory, &req->count);
+ return ret ? ret : vb2_core_reqbufs(q, req->memory, 0, &req->count);
}
EXPORT_SYMBOL_GPL(vb2_reqbufs);
@@ -797,7 +797,7 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create)
for (i = 0; i < requested_planes; i++)
if (requested_sizes[i] == 0)
return -EINVAL;
- return ret ? ret : vb2_core_create_bufs(q, create->memory,
+ return ret ? ret : vb2_core_create_bufs(q, create->memory, 0,
&create->count, requested_planes, requested_sizes);
}
EXPORT_SYMBOL_GPL(vb2_create_bufs);
@@ -973,7 +973,7 @@ int vb2_ioctl_reqbufs(struct file *file, void *priv,
return res;
if (vb2_queue_is_busy(vdev, file))
return -EBUSY;
- res = vb2_core_reqbufs(vdev->queue, p->memory, &p->count);
+ res = vb2_core_reqbufs(vdev->queue, p->memory, 0, &p->count);
/* If count == 0, then the owner has released all buffers and he
is no longer owner of the queue. Otherwise we have a new owner. */
if (res == 0)