From c6d22ab61bfdeb9d8572859cbc670e7335853817 Mon Sep 17 00:00:00 2001 From: Matthew Auld Date: Thu, 20 Sep 2018 15:27:06 +0100 Subject: [PATCH] drm/i915: don't assume struct page in i915_sg_trim If we copy all the contents of the sg across and not just the page link, we can then also put it to work in fake_get_huge_pages and beyond. Signed-off-by: Matthew Auld Cc: Tvrtko Ursulin Reviewed-by: Chris Wilson Reviewed-by: Tvrtko Ursulin Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20180920142707.19659-1-matthew.auld@intel.com --- drivers/gpu/drm/i915/i915_gem.c | 4 +++- drivers/gpu/drm/i915/selftests/huge_pages.c | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index a94d5a308c4d..b79362bbd97b 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2506,7 +2506,9 @@ static bool i915_sg_trim(struct sg_table *orig_st) new_sg = new_st.sgl; for_each_sg(orig_st->sgl, sg, orig_st->nents, i) { sg_set_page(new_sg, sg_page(sg), sg->length, 0); - /* called before being DMA mapped, no need to copy sg->dma_* */ + sg_dma_address(new_sg) = sg_dma_address(sg); + sg_dma_len(new_sg) = sg_dma_len(sg); + new_sg = sg_next(new_sg); } GEM_BUG_ON(new_sg); /* Should walk exactly nents and hit the end */ diff --git a/drivers/gpu/drm/i915/selftests/huge_pages.c b/drivers/gpu/drm/i915/selftests/huge_pages.c index e272127783fe..8d03f64eabd7 100644 --- a/drivers/gpu/drm/i915/selftests/huge_pages.c +++ b/drivers/gpu/drm/i915/selftests/huge_pages.c @@ -235,6 +235,8 @@ static int fake_get_huge_pages(struct drm_i915_gem_object *obj) sg = sg_next(sg); } while (1); + i915_sg_trim(st); + obj->mm.madv = I915_MADV_DONTNEED; __i915_gem_object_set_pages(obj, st, sg_page_sizes);