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From 3fc3f1dde33ff639d3303a12e32627074a168c6b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Thu, 7 Feb 2019 12:10:29 +0100
Subject: [PATCH 2235/2940] drm/amdgpu: disable concurrent flushes for Navi10
v2
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@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
--
2.17.1
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