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

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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: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230601144450.792228-1-andrzej.hajda@intel.com
This commit is contained in:
Andrzej Hajda 2023-06-01 16:44:50 +02:00
parent 1baeef6cd2
commit 4d4de1cbdb
1 changed files with 9 additions and 2 deletions
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11
drivers/gpu/drm/i915/gt/selftest_tlb.c
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@ -190,11 +190,18 @@ out:
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)