Commit ccbadd9e authored by Tvrtko Ursulin's avatar Tvrtko Ursulin Committed by Tvrtko Ursulin
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drm/amdgpu: Configure max beneficial TTM pool allocation order 



Let the TTM pool allocator know that we can afford for it to expend less
effort for satisfying contiguous allocations larger than 2MiB. The latter
is the maximum relevant PTE entry size and the driver and hardware are
happy to get larger blocks only opportunistically.

Signed-off-by: default avatarTvrtko Ursulin <tvrtko.ursulin@igalia.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarTvrtko Ursulin <tursulin@ursulin.net>
Link: https://lore.kernel.org/r/20251020115411.36818-6-tvrtko.ursulin@igalia.com
parent 7e9c548d

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

+3 −2
Original line number Diff line number Diff line
@@ -1837,7 +1837,7 @@ static int amdgpu_ttm_pools_init(struct amdgpu_device *adev) 
	for (i = 0; i < adev->gmc.num_mem_partitions; i++) {

		ttm_pool_init(&adev->mman.ttm_pools[i], adev->dev,

			      adev->gmc.mem_partitions[i].numa.node,

			      0);

			      TTM_ALLOCATION_POOL_BENEFICIAL_ORDER(get_order(SZ_2M)));

	}

	return 0;

}
@@ -1933,7 +1933,8 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) 
			       (adev->need_swiotlb ?

				TTM_ALLOCATION_POOL_USE_DMA_ALLOC : 0) |

			       (dma_addressing_limited(adev->dev) ?

				TTM_ALLOCATION_POOL_USE_DMA32 : 0));

				TTM_ALLOCATION_POOL_USE_DMA32 : 0) |

			       TTM_ALLOCATION_POOL_BENEFICIAL_ORDER(get_order(SZ_2M)));

	if (r) {

		dev_err(adev->dev,

			"failed initializing buffer object driver(%d).\n", r);