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drm/prime: add exported buffers to current fprivs imported buffer list (v2)

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If userspace attempts to import a buffer it exported on the same device,
we need to return the same GEM handle for it, not a new handle pointing
at the same GEM object.

v2: move removals into a single fn, no need to set to NULL. (Chris Wilson)

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2012-05-20 17:31:16 +01:00
parent 51ab7ba267
commit 0ff926c7d4
2 changed files with 27 additions and 6 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

21
drivers/gpu/drm/drm_gem.c
View file

@ -201,6 +201,19 @@ drm_gem_object_alloc(struct drm_device *dev, size_t size)
}
EXPORT_SYMBOL(drm_gem_object_alloc);
static void
drm_gem_remove_prime_handles(struct drm_gem_object *obj, struct drm_file *filp)
{
if (obj->import_attach) {
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->import_attach->dmabuf);
}
if (obj->export_dma_buf) {
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->export_dma_buf);
}
}
/**
* Removes the mapping from handle to filp for this object.
*/
@ -233,9 +246,7 @@ drm_gem_handle_delete(struct drm_file *filp, u32 handle)
idr_remove(&filp->object_idr, handle);
spin_unlock(&filp->table_lock);
if (obj->import_attach)
drm_prime_remove_imported_buf_handle(&filp->prime,
obj->import_attach->dmabuf);
drm_gem_remove_prime_handles(obj, filp);
if (dev->driver->gem_close_object)
dev->driver->gem_close_object(obj, filp);
@ -530,9 +541,7 @@ drm_gem_object_release_handle(int id, void *ptr, void *data)
struct drm_gem_object *obj = ptr;
struct drm_device *dev = obj->dev;
if (obj->import_attach)
drm_prime_remove_imported_buf_handle(&file_priv->prime,
obj->import_attach->dmabuf);
drm_gem_remove_prime_handles(obj, file_priv);
if (dev->driver->gem_close_object)
dev->driver->gem_close_object(obj, file_priv);

12
drivers/gpu/drm/drm_prime.c
View file

@ -68,6 +68,7 @@ int drm_gem_prime_handle_to_fd(struct drm_device *dev,
{
struct drm_gem_object *obj;
void *buf;
int ret;
obj = drm_gem_object_lookup(dev, file_priv, handle);
if (!obj)
@ -100,6 +101,17 @@ int drm_gem_prime_handle_to_fd(struct drm_device *dev,
obj->export_dma_buf = buf;
*prime_fd = dma_buf_fd(buf, flags);
}
/* if we've exported this buffer the cheat and add it to the import list
* so we get the correct handle back
*/
ret = drm_prime_add_imported_buf_handle(&file_priv->prime,
obj->export_dma_buf, handle);
if (ret) {
drm_gem_object_unreference_unlocked(obj);
mutex_unlock(&file_priv->prime.lock);
return ret;
}
mutex_unlock(&file_priv->prime.lock);
return 0;
}