[PATCH 108/459] drm/amdgpu: disable concurrent flushes for Navi10 v2

[Alex Deucher]

From: Christian König <christian.koenig at amd.com>

Navi10 have a bug in the SDMA which can theoretically cause memory
corruption with concurrent VMID flushes

v2: explicitely check Navi10

Signed-off-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
index df9b173c3d0b..5899d214187b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
@@ -364,8 +364,11 @@ static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
 		if (updates && (!flushed || dma_fence_is_later(updates, flushed)))
 			needs_flush = true;
 
-		/* Concurrent flushes are only possible starting with Vega10 */
-		if (adev->asic_type < CHIP_VEGA10 && needs_flush)
+		/* Concurrent flushes are only possible starting with Vega10 and
+		 * are broken on Navi10 and Navi14.
+		 */
+		if (needs_flush && (adev->asic_type < CHIP_VEGA10 ||
+				    adev->asic_type == CHIP_NAVI10))
 			continue;
 
 		/* Good, we can use this VMID. Remember this submission as
-- 
2.20.1