drm/i915/blt: fixup block_size rounding

There is nothing to say that the obj->base.size is actually a multiple
of the block_size.

v2: Use round_up() as block_size is a power-of-two

Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191028220325.9325-1-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
index 51acffd..70809d8 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
@@ -30,7 +30,7 @@ struct i915_vma *intel_emit_vma_fill_blt(struct intel_context *ce,
        GEM_BUG_ON(intel_engine_is_virtual(ce->engine));
        intel_engine_pm_get(ce->engine);
 
-       count = div_u64(vma->size, block_size);
+       count = div_u64(round_up(vma->size, block_size), block_size);
        size = (1 + 8 * count) * sizeof(u32);
        size = round_up(size, PAGE_SIZE);
        pool = intel_engine_get_pool(ce->engine, size);
@@ -214,7 +214,7 @@ struct i915_vma *intel_emit_vma_copy_blt(struct intel_context *ce,
        GEM_BUG_ON(intel_engine_is_virtual(ce->engine));
        intel_engine_pm_get(ce->engine);
 
-       count = div_u64(dst->size, block_size);
+       count = div_u64(round_up(dst->size, block_size), block_size);
        size = (1 + 11 * count) * sizeof(u32);
        size = round_up(size, PAGE_SIZE);
        pool = intel_engine_get_pool(ce->engine, size);