Commit 4d4de1cb authored by Andrzej Hajda's avatar Andrzej Hajda
Browse files

drm/i915/gt: limit lmem allocation size to succeed on SmallBars 

In case system is short on mappable memory (256MB on SmallBar) allocation
of two 1GB buffers will fail.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8300


Signed-off-by: default avatarAndrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: default avatarAndi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230601144450.792228-1-andrzej.hajda@intel.com
parent 1baeef6c

drivers/gpu/drm/i915/gt/selftest_tlb.c

+9 −2
Original line number Diff line number Diff line
@@ -190,11 +190,18 @@ pte_tlbinv(struct intel_context *ce, 


static struct drm_i915_gem_object *create_lmem(struct intel_gt *gt)

{

	struct intel_memory_region *mr = gt->i915->mm.regions[INTEL_REGION_LMEM_0];

	resource_size_t size = SZ_1G;



	/*

	 * Allocation of largest possible page size allows to test all types

	 * of pages.

	 * of pages. To succeed with both allocations, especially in case of Small

	 * BAR, try to allocate no more than quarter of mappable memory.

	 */

	return i915_gem_object_create_lmem(gt->i915, SZ_1G, I915_BO_ALLOC_CONTIGUOUS);

	if (mr && size > mr->io_size / 4)

		size = mr->io_size / 4;



	return i915_gem_object_create_lmem(gt->i915, size, I915_BO_ALLOC_CONTIGUOUS);

}



static struct drm_i915_gem_object *create_smem(struct intel_gt *gt)