drm/amdgpu: Skip some registers config for SRIOV

Some registers are not accessible to virtual function setup, so
skip their initialization when in VF-SRIOV mode.

v2: move SRIOV VF check into specify functions;
modify commit description and comment.

Signed-off-by: Liu ChengZhe <ChengZhe.Liu@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c
index 1f6112b..80c906a 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c
@@ -182,6 +182,12 @@ static void gfxhub_v2_1_init_cache_regs(struct amdgpu_device *adev)
 {
        uint32_t tmp;
 
+       /* These registers are not accessible to VF-SRIOV.
+        * The PF will program them instead.
+        */
+       if (amdgpu_sriov_vf(adev))
+               return;
+
        /* Setup L2 cache */
        tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL);
        tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_CACHE, 1);
@@ -237,6 +243,12 @@ static void gfxhub_v2_1_enable_system_domain(struct amdgpu_device *adev)
 
 static void gfxhub_v2_1_disable_identity_aperture(struct amdgpu_device *adev)
 {
+       /* These registers are not accessible to VF-SRIOV.
+        * The PF will program them instead.
+        */
+       if (amdgpu_sriov_vf(adev))
+               return;
+
        WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
                     0xFFFFFFFF);
        WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32,
@@ -373,6 +385,13 @@ void gfxhub_v2_1_set_fault_enable_default(struct amdgpu_device *adev,
                                          bool value)
 {
        u32 tmp;
+
+       /* These registers are not accessible to VF-SRIOV.
+        * The PF will program them instead.
+        */
+       if (amdgpu_sriov_vf(adev))
+               return;
+
        tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
        tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
                            RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);

diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c
index d839129..8acb3b6 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c
@@ -181,6 +181,12 @@ static void mmhub_v2_0_init_cache_regs(struct amdgpu_device *adev)
 {
        uint32_t tmp;
 
+       /* These registers are not accessible to VF-SRIOV.
+        * The PF will program them instead.
+        */
+       if (amdgpu_sriov_vf(adev))
+               return;
+
        /* Setup L2 cache */
        tmp = RREG32_SOC15(MMHUB, 0, mmMMVM_L2_CNTL);
        tmp = REG_SET_FIELD(tmp, MMVM_L2_CNTL, ENABLE_L2_CACHE, 1);
@@ -236,6 +242,12 @@ static void mmhub_v2_0_enable_system_domain(struct amdgpu_device *adev)
 
 static void mmhub_v2_0_disable_identity_aperture(struct amdgpu_device *adev)
 {
+       /* These registers are not accessible to VF-SRIOV.
+        * The PF will program them instead.
+        */
+       if (amdgpu_sriov_vf(adev))
+               return;
+
        WREG32_SOC15(MMHUB, 0,
                     mmMMVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
                     0xFFFFFFFF);
@@ -365,6 +377,13 @@ void mmhub_v2_0_gart_disable(struct amdgpu_device *adev)
 void mmhub_v2_0_set_fault_enable_default(struct amdgpu_device *adev, bool value)
 {
        u32 tmp;
+
+       /* These registers are not accessible to VF-SRIOV.
+        * The PF will program them instead.
+        */
+       if (amdgpu_sriov_vf(adev))
+               return;
+
        tmp = RREG32_SOC15(MMHUB, 0, mmMMVM_L2_PROTECTION_FAULT_CNTL);
        tmp = REG_SET_FIELD(tmp, MMVM_L2_PROTECTION_FAULT_CNTL,
                            RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);