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drm/prime: Introduce drm_gem_prime_import_dev 

The existing drm_gem_prime_import function uses the underlying
struct device of a drm_device for attaching to a dma_buf. Some drivers
(notably vgem) may not have an underlying device structure. Offer
an alternate function to attach using any available device structure.

Signed-off-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1493923548-20878-3-git-send-email-labbott@redhat.com
This commit is contained in:
Laura Abbott 2017-05-04 11:45:47 -07:00 committed by Daniel Vetter
parent e2aff44868
commit 7e491583df
2 changed files with 29 additions and 6 deletions
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30
drivers/gpu/drm/drm_prime.c
View File

@ -595,15 +595,18 @@ out_unlock:
EXPORT_SYMBOL(drm_gem_prime_handle_to_fd);
/**
* drm_gem_prime_import - helper library implementation of the import callback
* drm_gem_prime_import_dev - core implementation of the import callback
* @dev: drm_device to import into
* @dma_buf: dma-buf object to import
* @attach_dev: struct device to dma_buf attach
*
* This is the implementation of the gem_prime_import functions for GEM drivers
* using the PRIME helpers.
* This is the core of drm_gem_prime_import. It's designed to be called by
* drivers who want to use a different device structure than dev->dev for
* attaching via dma_buf.
*/
struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf)
struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
struct dma_buf *dma_buf,
struct device *attach_dev)
{
struct dma_buf_attachment *attach;
struct sg_table *sgt;
@ -625,7 +628,7 @@ struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
if (!dev->driver->gem_prime_import_sg_table)
return ERR_PTR(-EINVAL);
attach = dma_buf_attach(dma_buf, dev->dev);
attach = dma_buf_attach(dma_buf, attach_dev);
if (IS_ERR(attach))
return ERR_CAST(attach);
@ -655,6 +658,21 @@ fail_detach:
return ERR_PTR(ret);
}
EXPORT_SYMBOL(drm_gem_prime_import_dev);
/**
* drm_gem_prime_import - helper library implementation of the import callback
* @dev: drm_device to import into
* @dma_buf: dma-buf object to import
*
* This is the implementation of the gem_prime_import functions for GEM drivers
* using the PRIME helpers.
*/
struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf)
{
return drm_gem_prime_import_dev(dev, dma_buf, dev->dev);
}
EXPORT_SYMBOL(drm_gem_prime_import);
/**

5
include/drm/drm_prime.h
View File

@ -65,6 +65,11 @@ int drm_gem_prime_handle_to_fd(struct drm_device *dev,
int *prime_fd);
struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf);
struct drm_gem_object *drm_gem_prime_import_dev(struct drm_device *dev,
struct dma_buf *dma_buf,
struct device *attach_dev);
int drm_gem_prime_fd_to_handle(struct drm_device *dev,
struct drm_file *file_priv, int prime_fd, uint32_t *handle);
struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,