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drm/amdgpu: add check before enabling/disabling broadcast mode 

When security violation from new vbios happens, data fabric is
risky to stop working. So prevent the direct access to DF
mmFabricConfigAccessControl from the new vbios and onwards.

Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Guchun Chen 2019-12-04 15:51:16 +08:00 committed by Alex Deucher
parent b53bd16fec
commit 6e807535da
1 changed files with 21 additions and 15 deletions
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36
drivers/gpu/drm/amd/amdgpu/df_v3_6.c
View File

@ -268,23 +268,29 @@ static void df_v3_6_update_medium_grain_clock_gating(struct amdgpu_device *adev,
{
u32 tmp;
/* Put DF on broadcast mode */
adev->df_funcs->enable_broadcast_mode(adev, true);
if (adev->cg_flags & AMD_CG_SUPPORT_DF_MGCG) {
/* Put DF on broadcast mode */
adev->df_funcs->enable_broadcast_mode(adev, true);
if (enable && (adev->cg_flags & AMD_CG_SUPPORT_DF_MGCG)) {
tmp = RREG32_SOC15(DF, 0, mmDF_PIE_AON0_DfGlobalClkGater);
tmp &= ~DF_PIE_AON0_DfGlobalClkGater__MGCGMode_MASK;
tmp |= DF_V3_6_MGCG_ENABLE_15_CYCLE_DELAY;
WREG32_SOC15(DF, 0, mmDF_PIE_AON0_DfGlobalClkGater, tmp);
} else {
tmp = RREG32_SOC15(DF, 0, mmDF_PIE_AON0_DfGlobalClkGater);
tmp &= ~DF_PIE_AON0_DfGlobalClkGater__MGCGMode_MASK;
tmp |= DF_V3_6_MGCG_DISABLE;
WREG32_SOC15(DF, 0, mmDF_PIE_AON0_DfGlobalClkGater, tmp);
if (enable) {
tmp = RREG32_SOC15(DF, 0,
mmDF_PIE_AON0_DfGlobalClkGater);
tmp &= ~DF_PIE_AON0_DfGlobalClkGater__MGCGMode_MASK;
tmp |= DF_V3_6_MGCG_ENABLE_15_CYCLE_DELAY;
WREG32_SOC15(DF, 0,
mmDF_PIE_AON0_DfGlobalClkGater, tmp);
} else {
tmp = RREG32_SOC15(DF, 0,
mmDF_PIE_AON0_DfGlobalClkGater);
tmp &= ~DF_PIE_AON0_DfGlobalClkGater__MGCGMode_MASK;
tmp |= DF_V3_6_MGCG_DISABLE;
WREG32_SOC15(DF, 0,
mmDF_PIE_AON0_DfGlobalClkGater, tmp);
}
/* Exit broadcast mode */
adev->df_funcs->enable_broadcast_mode(adev, false);
}
/* Exit broadcast mode */
adev->df_funcs->enable_broadcast_mode(adev, false);
}
static void df_v3_6_get_clockgating_state(struct amdgpu_device *adev,