[Intel-gfx] [PATCH] drm/i915: opportunistically apply ALLOC_CONTIGIOUS

Matthew Auld matthew.auld at intel.com
Wed Feb 2 17:31:54 UTC 2022

It looks like this code was accidentally dropped at some point(in a
slightly different form), so add it back. The gist is that if we know
the allocation will be one single chunk, then we can just annotate the
BO with I915_BO_ALLOC_CONTIGUOUS, even if the user doesn't bother. In
the future this might prove to be potentially useful.

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>
 drivers/gpu/drm/i915/gem/i915_gem_region.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.c b/drivers/gpu/drm/i915/gem/i915_gem_region.c
index a4350227e9ae..dd414a2bcb06 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_region.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_region.c
@@ -57,6 +57,9 @@ i915_gem_object_create_region(struct intel_memory_region *mem,
 	size = round_up(size, default_page_size);
+	if (default_page_size == size)
+		flags |= I915_BO_ALLOC_CONTIGUOUS;

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