drm/amdgpu: use the maximum possible fragment size on Vega/Raven

The fragment size controls only the L1 on Vega/Raven and we now don't
have any extra overhead any more because of larger fragments.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 45343501c1f3..2d2d6197c3dc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1540,8 +1540,16 @@ static void amdgpu_vm_fragment(struct amdgpu_pte_update_params *params,
          * larger. Thus, we try to use large fragments wherever possible.
          * Userspace can support this by aligning virtual base address and
          * allocation size to the fragment size.
+         *
+         * Starting with Vega10 the fragment size only controls the L1. The L2
+         * is now directly feed with small/huge/giant pages from the walker.
          */
-        unsigned max_frag = params->adev->vm_manager.fragment_size;
+        unsigned max_frag;
+
+        if (params->adev->asic_type < CHIP_VEGA10)
+                max_frag = params->adev->vm_manager.fragment_size;
+        else
+                max_frag = 31;
 
         /* system pages are non continuously */
         if (params->src || !(flags & AMDGPU_PTE_VALID)) {