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From 2b85e70c79b4ea22b49140e9c1a7c9fb2101bbbf Mon Sep 17 00:00:00 2001
From: wentalou <Wentao.Lou@amd.com>
Date: Mon, 14 Jan 2019 16:26:13 +0800
Subject: [PATCH 1158/2940] drm/amdgpu: csa_vaddr should not larger than
AMDGPU_GMC_HOLE_START
After removing unnecessary VM size calculations,
vm_manager.max_pfn would reach 0x10,0000,0000
max_pfn << AMDGPU_GPU_PAGE_SHIFT exceeding AMDGPU_GMC_HOLE_START
would cause GPU reset.
Signed-off-by: wentalou <Wentao.Lou@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c
index 7e22be7ca68a..dd3bd01e3070 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c
@@ -26,7 +26,8 @@
uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev)
{
- uint64_t addr = adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT;
+ uint64_t addr = min(adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT,
+ AMDGPU_GMC_HOLE_START);
addr -= AMDGPU_VA_RESERVED_SIZE;
addr = amdgpu_gmc_sign_extend(addr);
--
2.17.1
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