diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_scatterlist.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_scatterlist.h | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_scatterlist.h b/drivers/gpu/drm/i915/i915_scatterlist.h index 9cb26a224034..5acca45ea981 100644 --- a/drivers/gpu/drm/i915/i915_scatterlist.h +++ b/drivers/gpu/drm/i915/i915_scatterlist.h @@ -13,6 +13,8 @@ #include "i915_gem.h" +struct drm_mm_node; + /* * Optimised SGL iterator for GEM objects */ @@ -101,15 +103,23 @@ static inline struct scatterlist *__sg_next(struct scatterlist *sg) (((__iter).curr += PAGE_SIZE) >= (__iter).max) ? \ (__iter) = __sgt_iter(__sg_next((__iter).sgp), false), 0 : 0) -static inline unsigned int i915_sg_page_sizes(struct scatterlist *sg) +/** + * i915_sg_dma_sizes - Record the dma segment sizes of a scatterlist + * @sg: The scatterlist + * + * Return: An unsigned int with segment sizes logically or'ed together. + * A caller can use this information to determine what hardware page table + * entry sizes can be used to map the memory represented by the scatterlist. + */ +static inline unsigned int i915_sg_dma_sizes(struct scatterlist *sg) { unsigned int page_sizes; page_sizes = 0; - while (sg) { + while (sg && sg_dma_len(sg)) { GEM_BUG_ON(sg->offset); - GEM_BUG_ON(!IS_ALIGNED(sg->length, PAGE_SIZE)); - page_sizes |= sg->length; + GEM_BUG_ON(!IS_ALIGNED(sg_dma_len(sg), PAGE_SIZE)); + page_sizes |= sg_dma_len(sg); sg = __sg_next(sg); } @@ -133,4 +143,6 @@ static inline unsigned int i915_sg_segment_size(void) bool i915_sg_trim(struct sg_table *orig_st); +struct sg_table *i915_sg_from_mm_node(const struct drm_mm_node *node, + u64 region_start); #endif |