diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_region.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_region.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.c b/drivers/gpu/drm/i915/gem/i915_gem_region.c index 6a84fb6dde24..ce8fcfc54079 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_region.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_region.c @@ -95,6 +95,28 @@ i915_gem_object_get_pages_buddy(struct drm_i915_gem_object *obj) sg_mark_end(sg); i915_sg_trim(st); + /* Intended for kernel internal use only */ + if (obj->flags & I915_BO_ALLOC_CPU_CLEAR) { + struct scatterlist *sg; + unsigned long i; + + for_each_sg(st->sgl, sg, st->nents, i) { + unsigned int length; + void __iomem *vaddr; + dma_addr_t daddr; + + daddr = sg_dma_address(sg); + daddr -= mem->region.start; + length = sg_dma_len(sg); + + vaddr = io_mapping_map_wc(&mem->iomap, daddr, length); + memset64((void __force *)vaddr, 0, length / sizeof(u64)); + io_mapping_unmap(vaddr); + } + + wmb(); + } + __i915_gem_object_set_pages(obj, st, sg_page_sizes); return 0; |