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authorGerd Hoffmann <kraxel@redhat.com>2020-09-07 13:24:25 +0200
committerGerd Hoffmann <kraxel@redhat.com>2020-09-09 07:58:56 +0200
commit707d561f77b5e2a6f90c9786bee44ee7a8dedc7e (patch)
tree0d61c5038b1f4e8d9f5c0640b7349058600cb9d7 /include/drm
parent04e89ff364dec3dc261243c2f0780635448bc466 (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.h3
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);