diff options
| author | Imre Deak <imre.deak@intel.com> | 2013-02-18 21:28:02 +0400 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-03-23 15:16:36 +0400 |
| commit | 67d5a50c0480d5d41e0423e6fa55984f9fd3381e (patch) | |
| tree | 39fb959984569314651ea53a7e386e758225adeb /drivers/gpu/drm/i915/i915_gem_dmabuf.c | |
| parent | 5bd4687e57bbacec20930f580d025aee9fa1f4d8 (diff) | |
| download | linux-67d5a50c0480d5d41e0423e6fa55984f9fd3381e.tar.xz | |
drm/i915: handle walking compact dma scatter lists
So far the assumption was that each dma scatter list entry contains only
a single page. This might not hold in the future, when we'll introduce
compact scatter lists, so prepare for this everywhere in the i915 code
where we walk such a list.
We'll fix the place _creating_ these lists separately in the next patch
to help the reviewing/bisectability.
Reference: http://www.spinics.net/lists/dri-devel/msg33917.html
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_dmabuf.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_dmabuf.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c index 6a5af6828624..898615d2d5e2 100644 --- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c @@ -62,7 +62,7 @@ static struct sg_table *i915_gem_map_dma_buf(struct dma_buf_attachment *attachme src = obj->pages->sgl; dst = st->sgl; for (i = 0; i < obj->pages->nents; i++) { - sg_set_page(dst, sg_page(src), PAGE_SIZE, 0); + sg_set_page(dst, sg_page(src), src->length, 0); dst = sg_next(dst); src = sg_next(src); } @@ -105,7 +105,7 @@ static void *i915_gem_dmabuf_vmap(struct dma_buf *dma_buf) { struct drm_i915_gem_object *obj = dma_buf->priv; struct drm_device *dev = obj->base.dev; - struct scatterlist *sg; + struct sg_page_iter sg_iter; struct page **pages; int ret, i; @@ -124,14 +124,15 @@ static void *i915_gem_dmabuf_vmap(struct dma_buf *dma_buf) ret = -ENOMEM; - pages = drm_malloc_ab(obj->pages->nents, sizeof(struct page *)); + pages = drm_malloc_ab(obj->base.size >> PAGE_SHIFT, sizeof(*pages)); if (pages == NULL) goto error; - for_each_sg(obj->pages->sgl, sg, obj->pages->nents, i) - pages[i] = sg_page(sg); + i = 0; + for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0); + pages[i++] = sg_iter.page; - obj->dma_buf_vmapping = vmap(pages, obj->pages->nents, 0, PAGE_KERNEL); + obj->dma_buf_vmapping = vmap(pages, i, 0, PAGE_KERNEL); drm_free_large(pages); if (!obj->dma_buf_vmapping) |