drm/amdgpu: add poison mode query for DF (v2)

Add ras poison mode query interface for DF.

v2: replace RREG32_PCIE with RREG32_SOC15.
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_df.h

@@ -52,6 +52,7 @@ struct amdgpu_df_funcs {
 	uint64_t (*get_fica)(struct amdgpu_device *adev, uint32_t ficaa_val);
 	void (*set_fica)(struct amdgpu_device *adev, uint32_t ficaa_val,
 			 uint32_t ficadl_val, uint32_t ficadh_val);
+	bool (*query_ras_poison_mode)(struct amdgpu_device *adev);
 };
 
 struct amdgpu_df {

drivers/gpu/drm/amd/amdgpu/df_v3_6.c

@@ -637,6 +637,36 @@ static void df_v3_6_pmc_get_count(struct amdgpu_device *adev,
 	}
 }
 
+static bool df_v3_6_query_ras_poison_mode(struct amdgpu_device *adev)
+{
+	uint32_t hw_assert_msklo, hw_assert_mskhi;
+	uint32_t v0, v1, v28, v31;
+
+	hw_assert_msklo = RREG32_SOC15(DF, 0,
+				mmDF_CS_UMC_AON0_HardwareAssertMaskLow);
+	hw_assert_mskhi = RREG32_SOC15(DF, 0,
+				mmDF_NCS_PG0_HardwareAssertMaskHigh);
+
+	v0 = REG_GET_FIELD(hw_assert_msklo,
+		DF_CS_UMC_AON0_HardwareAssertMaskLow, HWAssertMsk0);
+	v1 = REG_GET_FIELD(hw_assert_msklo,
+		DF_CS_UMC_AON0_HardwareAssertMaskLow, HWAssertMsk1);
+	v28 = REG_GET_FIELD(hw_assert_mskhi,
+		DF_NCS_PG0_HardwareAssertMaskHigh, HWAssertMsk28);
+	v31 = REG_GET_FIELD(hw_assert_mskhi,
+		DF_NCS_PG0_HardwareAssertMaskHigh, HWAssertMsk31);
+
+	if (v0 && v1 && v28 && v31)
+		return true;
+	else if (!v0 && !v1 && !v28 && !v31)
+		return false;
+	else {
+		dev_warn(adev->dev, "DF poison setting is inconsistent(%d:%d:%d:%d)!\n",
+				v0, v1, v28, v31);
+		return false;
+	}
+}
+
 const struct amdgpu_df_funcs df_v3_6_funcs = {
 	.sw_init = df_v3_6_sw_init,
 	.sw_fini = df_v3_6_sw_fini,
@@ -651,4 +681,5 @@ const struct amdgpu_df_funcs df_v3_6_funcs = {
 	.pmc_get_count = df_v3_6_pmc_get_count,
 	.get_fica = df_v3_6_get_fica,
 	.set_fica = df_v3_6_set_fica,
+	.query_ras_poison_mode = df_v3_6_query_ras_poison_mode,
 };

drivers/gpu/drm/amd/include/asic_reg/df/df_3_6_offset.h

@@ -77,4 +77,9 @@
 #define smnDF_CS_UMC_AON0_DramBaseAddress0 	0x1c110UL
 #define smnDF_CS_UMC_AON0_DramLimitAddress0 	0x1c114UL
 
+#define mmDF_CS_UMC_AON0_HardwareAssertMaskLow                                                         0x067e
+#define mmDF_CS_UMC_AON0_HardwareAssertMaskLow_BASE_IDX                                                0
+#define mmDF_NCS_PG0_HardwareAssertMaskHigh                                                            0x067f
+#define mmDF_NCS_PG0_HardwareAssertMaskHigh_BASE_IDX                                                   0
+
 #endif