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drm/amdgpu: implement UMC 64 bits REG operations

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implement 64 bits operations via 32 bits interface

v2: make use of lower_32_bits() and upper_32_bits() macros

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tao Zhou
2019-08-09 15:57:50 +08:00
committed by Alex Deucher
parent c6dddf4540
commit dd21a572c9
2 changed files with 14 additions and 5 deletions
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9
drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h
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@@ -21,6 +21,15 @@
#ifndef __AMDGPU_UMC_H__
#define __AMDGPU_UMC_H__
/* implement 64 bits REG operations via 32 bits interface */
#define RREG64_UMC(reg) (RREG32(reg) | \
((uint64_t)RREG32((reg) + 1) << 32))
#define WREG64_UMC(reg, v) \
do { \
WREG32((reg), lower_32_bits(v)); \
WREG32((reg) + 1, upper_32_bits(v)); \
} while (0)
/*
* void (*func)(struct amdgpu_device *adev, struct ras_err_data *err_data,
* uint32_t umc_reg_offset, uint32_t channel_index)