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drm/prime: Export more helpers for drivers

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Export some more of the helpers in order to allow drivers to more fine-
grainedly select which helpers to use. This gives drivers an easy way to
reuse a lot of the code in the helpers while at the same time allowing
them to provide their own implementation for other functions in struct
dma_buf_ops.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2018-01-11 22:44:17 +01:00 • committed by Andre Heider
parent 7960477aa3
commit a851f3c5e1
2 changed files with 25 additions and 10 deletions
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23
drivers/gpu/drm/drm_prime.c
View file

@ -180,9 +180,8 @@ static int drm_prime_lookup_buf_handle(struct drm_prime_file_private *prime_fpri
return -ENOENT;
}
static int drm_gem_map_attach(struct dma_buf *dma_buf,
struct device *target_dev,
struct dma_buf_attachment *attach)
int drm_gem_map_attach(struct dma_buf *dma_buf, struct device *target_dev,
struct dma_buf_attachment *attach)
{
struct drm_prime_attachment *prime_attach;
struct drm_gem_object *obj = dma_buf->priv;
@ -200,9 +199,10 @@ static int drm_gem_map_attach(struct dma_buf *dma_buf,
return dev->driver->gem_prime_pin(obj);
}
EXPORT_SYMBOL(drm_gem_map_attach);
static void drm_gem_map_detach(struct dma_buf *dma_buf,
struct dma_buf_attachment *attach)
void drm_gem_map_detach(struct dma_buf *dma_buf,
struct dma_buf_attachment *attach)
{
struct drm_prime_attachment *prime_attach = attach->priv;
struct drm_gem_object *obj = dma_buf->priv;
@ -228,6 +228,7 @@ static void drm_gem_map_detach(struct dma_buf *dma_buf,
kfree(prime_attach);
attach->priv = NULL;
}
EXPORT_SYMBOL(drm_gem_map_detach);
void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv,
struct dma_buf *dma_buf)
@ -254,8 +255,8 @@ void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpr
}
}
static struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
enum dma_data_direction dir)
struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
enum dma_data_direction dir)
{
struct drm_prime_attachment *prime_attach = attach->priv;
struct drm_gem_object *obj = attach->dmabuf->priv;
@ -291,13 +292,15 @@ static struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
return sgt;
}
EXPORT_SYMBOL(drm_gem_map_dma_buf);
static void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
struct sg_table *sgt,
enum dma_data_direction dir)
void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
struct sg_table *sgt,
enum dma_data_direction dir)
{
/* nothing to be done here */
}
EXPORT_SYMBOL(drm_gem_unmap_dma_buf);
/**
* drm_gem_dmabuf_export - dma_buf export implementation for GEM

12
include/drm/drm_prime.h
View file

@ -50,8 +50,10 @@ struct drm_prime_file_private {
struct rb_root handles;
};
enum dma_data_direction;
struct device;
struct dma_buf_attachment;
struct dma_buf_export_info;
struct dma_buf;
@ -59,6 +61,16 @@ struct drm_device;
struct drm_gem_object;
struct drm_file;
int drm_gem_map_attach(struct dma_buf *dma_buf, struct device *target_dev,
struct dma_buf_attachment *attach);
void drm_gem_map_detach(struct dma_buf *dma_buf,
struct dma_buf_attachment *attach);
struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach,
enum dma_data_direction dir);
void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
struct sg_table *sgt,
enum dma_data_direction dir);
struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *obj,
int flags);