drm/amdgpu: implement umc ras init function

enable umc ce interrupt and initialize ecc error count
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/umc_v6_1.c

@@ -207,9 +207,41 @@ static void umc_v6_1_query_ras_error_address(struct amdgpu_device *adev,
 	amdgpu_umc_for_each_channel(umc_v6_1_query_error_address);
 }
 
+static void umc_v6_1_ras_init_per_channel(struct amdgpu_device *adev,
+					 struct ras_err_data *err_data,
+					 uint32_t umc_reg_offset, uint32_t channel_index)
+{
+	uint32_t ecc_err_cnt_sel, ecc_err_cnt_sel_addr;
+	uint32_t ecc_err_cnt_addr;
+
+	ecc_err_cnt_sel_addr =
+		SOC15_REG_OFFSET(UMC, 0, mmUMCCH0_0_EccErrCntSel);
+	ecc_err_cnt_addr =
+		SOC15_REG_OFFSET(UMC, 0, mmUMCCH0_0_EccErrCnt);
+
+	/* select the lower chip and check the error count */
+	ecc_err_cnt_sel = RREG32(ecc_err_cnt_sel_addr + umc_reg_offset);
+	ecc_err_cnt_sel = REG_SET_FIELD(ecc_err_cnt_sel, UMCCH0_0_EccErrCntSel,
+					EccErrCntCsSel, 0);
+	/* set ce error interrupt type to APIC based interrupt */
+	ecc_err_cnt_sel = REG_SET_FIELD(ecc_err_cnt_sel, UMCCH0_0_EccErrCntSel,
+					EccErrInt, 0x1);
+	WREG32(ecc_err_cnt_sel_addr + umc_reg_offset, ecc_err_cnt_sel);
+	/* set error count to initial value */
+	WREG32(ecc_err_cnt_addr + umc_reg_offset, UMC_V6_1_CE_CNT_INIT);
+
+	/* select the higher chip and check the err counter */
+	ecc_err_cnt_sel = REG_SET_FIELD(ecc_err_cnt_sel, UMCCH0_0_EccErrCntSel,
+					EccErrCntCsSel, 1);
+	WREG32(ecc_err_cnt_sel_addr + umc_reg_offset, ecc_err_cnt_sel);
+	WREG32(ecc_err_cnt_addr + umc_reg_offset, UMC_V6_1_CE_CNT_INIT);
+}
+
 static void umc_v6_1_ras_init(struct amdgpu_device *adev)
 {
+	void *ras_error_status = NULL;
 
+	amdgpu_umc_for_each_channel(umc_v6_1_ras_init_per_channel);
 }
 
 const struct amdgpu_umc_funcs umc_v6_1_funcs = {

drivers/gpu/drm/amd/amdgpu/umc_v6_1.h

@@ -37,6 +37,13 @@
 /* UMC regiser per channel offset */
 #define UMC_V6_1_PER_CHANNEL_OFFSET		0x800
 
+/* EccErrCnt max value */
+#define UMC_V6_1_CE_CNT_MAX		0xffff
+/* umc ce interrupt threshold */
+#define UMC_V6_1_CE_INT_THRESHOLD	0xffff
+/* umc ce count initial value */
+#define UMC_V6_1_CE_CNT_INIT	(UMC_V6_1_CE_CNT_MAX - UMC_V6_1_CE_INT_THRESHOLD)
+
 extern const struct amdgpu_umc_funcs umc_v6_1_funcs;
 extern const uint32_t
 	umc_v6_1_channel_idx_tbl[UMC_V6_1_UMC_INSTANCE_NUM][UMC_V6_1_CHANNEL_INSTANCE_NUM];