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radeon: use memcpy_to/fromio for UVD fw upload 

I met a gpu addr bug recently and the kernel log
tells me the pc is memcpy/memset and link register is
radeon_uvd_resume.

As we know, in some architectures, optimized memcpy/memset
may not work well on device memory. Trival memcpy_toio/memset_io
can fix this problem.

BTW, amdgpu has already done it in:
commit ba0b2275a6 ("drm/amdgpu: use memcpy_to/fromio for UVD fw upload"),
that's why it has no this issue on the same gpu and platform.

Signed-off-by: Chen Li <chenli@uniontech.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Chen Li 2021-06-04 16:43:02 +08:00 committed by Alex Deucher
parent c0f2b640e5
commit 65e06b7873
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/radeon/radeon_uvd.c
View File

@ -288,7 +288,7 @@ int radeon_uvd_resume(struct radeon_device *rdev)
if (rdev->uvd.vcpu_bo == NULL)
return -EINVAL;
memcpy(rdev->uvd.cpu_addr, rdev->uvd_fw->data, rdev->uvd_fw->size);
memcpy_toio((void __iomem *)rdev->uvd.cpu_addr, rdev->uvd_fw->data, rdev->uvd_fw->size);
size = radeon_bo_size(rdev->uvd.vcpu_bo);
size -= rdev->uvd_fw->size;
@ -296,7 +296,7 @@ int radeon_uvd_resume(struct radeon_device *rdev)
ptr = rdev->uvd.cpu_addr;
ptr += rdev->uvd_fw->size;
memset(ptr, 0, size);
memset_io((void __iomem *)ptr, 0, size);
return 0;
}