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dma-buf: drop dynamic_mapping flag 

Instead use the pin() callback to detect dynamic DMA-buf handling.
Since amdgpu is now migrated it doesn't make much sense to keep
the extra flag.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/353997/?series=73646&rev=1
This commit is contained in:
Christian König 2020-02-18 16:57:24 +01:00
parent a448cb003e
commit bd2275eeed
3 changed files with 7 additions and 20 deletions
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5
drivers/dma-buf/dma-buf.c
View File

@ -524,11 +524,10 @@ struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info)
}
if (WARN_ON(exp_info->ops->cache_sgt_mapping &&
exp_info->ops->dynamic_mapping))
(exp_info->ops->pin || exp_info->ops->unpin)))
return ERR_PTR(-EINVAL);
if (WARN_ON(!exp_info->ops->dynamic_mapping &&
(exp_info->ops->pin || exp_info->ops->unpin)))
if (WARN_ON(!exp_info->ops->pin != !exp_info->ops->unpin))
return ERR_PTR(-EINVAL);
if (!try_module_get(exp_info->owner))

1
drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
View File

@ -364,7 +364,6 @@ static int amdgpu_dma_buf_begin_cpu_access(struct dma_buf *dma_buf,
}
const struct dma_buf_ops amdgpu_dmabuf_ops = {
.dynamic_mapping = true,
.attach = amdgpu_dma_buf_attach,
.detach = amdgpu_dma_buf_detach,
.pin = amdgpu_dma_buf_pin,

21
include/linux/dma-buf.h
View File

@ -42,18 +42,6 @@ struct dma_buf_ops {
*/
bool cache_sgt_mapping;
/**
* @dynamic_mapping:
*
* If true the framework makes sure that the map/unmap_dma_buf
* callbacks are always called with the dma_resv object locked.
*
* If false the framework makes sure that the map/unmap_dma_buf
* callbacks are always called without the dma_resv object locked.
* Mutual exclusive with @cache_sgt_mapping.
*/
bool dynamic_mapping;
/**
* @attach:
*
@ -99,7 +87,8 @@ struct dma_buf_ops {
* This is called by dma_buf_pin and lets the exporter know that the
* DMA-buf can't be moved any more.
*
* This is called with the dmabuf->resv object locked.
* This is called with the dmabuf->resv object locked and is mutual
* exclusive with @cache_sgt_mapping.
*
* This callback is optional and should only be used in limited use
* cases like scanout and not for temporary pin operations.
@ -116,7 +105,8 @@ struct dma_buf_ops {
* This is called by dma_buf_unpin and lets the exporter know that the
* DMA-buf can be moved again.
*
* This is called with the dmabuf->resv object locked.
* This is called with the dmabuf->resv object locked and is mutual
* exclusive with @cache_sgt_mapping.
*
* This callback is optional.
*/
@ -455,8 +445,7 @@ static inline void get_dma_buf(struct dma_buf *dmabuf)
*/
static inline bool dma_buf_is_dynamic(struct dma_buf *dmabuf)
{
/* TODO: switch to using pin/unpin functions as indicator. */
return dmabuf->ops->dynamic_mapping;
return !!dmabuf->ops->pin;
}
/**