diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2020-09-07 14:24:25 +0300 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2020-09-09 08:58:56 +0300 |
| commit | 707d561f77b5e2a6f90c9786bee44ee7a8dedc7e (patch) | |
| tree | 0d61c5038b1f4e8d9f5c0640b7349058600cb9d7 /drivers/gpu/drm/etnaviv | |
| parent | 04e89ff364dec3dc261243c2f0780635448bc466 (diff) | |
| download | linux-707d561f77b5e2a6f90c9786bee44ee7a8dedc7e.tar.xz | |
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 'drivers/gpu/drm/etnaviv')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gem.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c index f06e19e7be04..ea19f1d27275 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c @@ -103,7 +103,8 @@ struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *etnaviv_obj) int npages = etnaviv_obj->base.size >> PAGE_SHIFT; struct sg_table *sgt; - sgt = drm_prime_pages_to_sg(etnaviv_obj->pages, npages); + sgt = drm_prime_pages_to_sg(etnaviv_obj->base.dev, + etnaviv_obj->pages, npages); if (IS_ERR(sgt)) { dev_err(dev->dev, "failed to allocate sgt: %ld\n", PTR_ERR(sgt)); diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c index 6d9e5c3c4dd5..4aa3426a9ba4 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c @@ -19,7 +19,7 @@ struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj) if (WARN_ON(!etnaviv_obj->pages)) /* should have already pinned! */ return ERR_PTR(-EINVAL); - return drm_prime_pages_to_sg(etnaviv_obj->pages, npages); + return drm_prime_pages_to_sg(obj->dev, etnaviv_obj->pages, npages); } void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj) |