diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2020-09-07 13:24:25 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2020-09-09 07:58:56 +0200 |
| commit | 707d561f77b5e2a6f90c9786bee44ee7a8dedc7e (patch) | |
| tree | 0d61c5038b1f4e8d9f5c0640b7349058600cb9d7 /include/drm | |
| parent | 04e89ff364dec3dc261243c2f0780635448bc466 (diff) | |
drm: allow limiting the scatter list size.
Add drm_device argument to drm_prime_pages_to_sg(), so we can
call dma_max_mapping_size() to figure the segment size limit
and call into __sg_alloc_table_from_pages() with the correct
limit.
This fixes virtio-gpu with sev. Possibly it'll fix other bugs
too given that drm seems to totaly ignore segment size limits
so far ...
v2: place max_segment in drm driver not gem object.
v3: move max_segment next to the other gem fields.
v4: just use dma_max_mapping_size().
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20200907112425.15610-2-kraxel@redhat.com
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_prime.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h index 9af7422b44cf..bf141e74a1c2 100644 --- a/include/drm/drm_prime.h +++ b/include/drm/drm_prime.h @@ -88,7 +88,8 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr); int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma); -struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages); +struct sg_table *drm_prime_pages_to_sg(struct drm_device *dev, + struct page **pages, unsigned int nr_pages); struct dma_buf *drm_gem_prime_export(struct drm_gem_object *obj, int flags); |