[PATCH 06/26] drm/amdgpu: add umc v6_1 query error count support

[Alex Deucher <alexdeucher-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

From: Hawking Zhang <Hawking.Zhang@amd.com>

Implement umc query_ras_error_count function to support querry
both correctable and uncorrectable error

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Dennis Li <dennis.li@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/Makefile   |   4 +
 drivers/gpu/drm/amd/amdgpu/umc_v6_1.c | 162 ++++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/umc_v6_1.h |  39 +++++++
 3 files changed, 205 insertions(+)
 create mode 100644 drivers/gpu/drm/amd/amdgpu/umc_v6_1.c
 create mode 100644 drivers/gpu/drm/amd/amdgpu/umc_v6_1.h

diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 7a1a78c7b329..cc38a6836825 100644
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -81,6 +81,10 @@ amdgpu-y += \
 	gfxhub_v1_0.o mmhub_v1_0.o gmc_v9_0.o gfxhub_v1_1.o mmhub_v9_4.o \
 	gfxhub_v2_0.o mmhub_v2_0.o gmc_v10_0.o
 
+# add UMC block
+amdgpu-y += \
+	umc_v6_1.o
+
 # add IH block
 amdgpu-y += \
 	amdgpu_irq.o \
diff --git a/drivers/gpu/drm/amd/amdgpu/umc_v6_1.c b/drivers/gpu/drm/amd/amdgpu/umc_v6_1.c
new file mode 100644
index 000000000000..1ca5ae642946
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/umc_v6_1.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2019 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#include "umc_v6_1.h"
+#include "amdgpu_ras.h"
+#include "amdgpu.h"
+
+#include "rsmu/rsmu_0_0_2_offset.h"
+#include "rsmu/rsmu_0_0_2_sh_mask.h"
+#include "umc/umc_6_1_1_offset.h"
+#include "umc/umc_6_1_1_sh_mask.h"
+
+static void umc_v6_1_enable_umc_index_mode(struct amdgpu_device *adev,
+					   uint32_t umc_instance)
+{
+	uint32_t rsmu_umc_index;
+
+	rsmu_umc_index = RREG32_SOC15(RSMU, 0,
+			mmRSMU_UMC_INDEX_REGISTER_NBIF_VG20_GPU);
+	rsmu_umc_index = REG_SET_FIELD(rsmu_umc_index,
+			RSMU_UMC_INDEX_REGISTER_NBIF_VG20_GPU,
+			RSMU_UMC_INDEX_MODE_EN, 1);
+	rsmu_umc_index = REG_SET_FIELD(rsmu_umc_index,
+			RSMU_UMC_INDEX_REGISTER_NBIF_VG20_GPU,
+			RSMU_UMC_INDEX_INSTANCE, umc_instance);
+	rsmu_umc_index = REG_SET_FIELD(rsmu_umc_index,
+			RSMU_UMC_INDEX_REGISTER_NBIF_VG20_GPU,
+			RSMU_UMC_INDEX_WREN, 1 << umc_instance);
+	WREG32_SOC15(RSMU, 0, mmRSMU_UMC_INDEX_REGISTER_NBIF_VG20_GPU,
+				rsmu_umc_index);
+}
+
+static void umc_v6_1_disable_umc_index_mode(struct amdgpu_device *adev)
+{
+	WREG32_FIELD15(RSMU, 0, RSMU_UMC_INDEX_REGISTER_NBIF_VG20_GPU,
+			RSMU_UMC_INDEX_MODE_EN, 0);
+}
+
+static void umc_v6_1_query_correctable_error_count(struct amdgpu_device *adev,
+						   uint32_t umc_reg_offset,
+						   unsigned long *error_count)
+{
+	uint32_t ecc_err_cnt_sel, ecc_err_cnt_sel_addr;
+	uint32_t ecc_err_cnt, ecc_err_cnt_addr;
+	uint64_t mc_umc_status;
+	uint32_t mc_umc_status_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);
+	mc_umc_status_addr =
+		SOC15_REG_OFFSET(UMC, 0, mmMCA_UMC_UMC0_MCUMC_STATUST0);
+
+	/* 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);
+	WREG32(ecc_err_cnt_sel_addr + umc_reg_offset, ecc_err_cnt_sel);
+	ecc_err_cnt = RREG32(ecc_err_cnt_addr + umc_reg_offset);
+	*error_count +=
+		REG_GET_FIELD(ecc_err_cnt, UMCCH0_0_EccErrCnt, EccErrCnt);
+	/* clear the lower chip err count */
+	WREG32(ecc_err_cnt_addr + umc_reg_offset, 0);
+
+	/* 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);
+	ecc_err_cnt = RREG32(ecc_err_cnt_addr + umc_reg_offset);
+	*error_count +=
+		REG_GET_FIELD(ecc_err_cnt, UMCCH0_0_EccErrCnt, EccErrCnt);
+	/* clear the higher chip err count */
+	WREG32(ecc_err_cnt_addr + umc_reg_offset, 0);
+
+	/* check for SRAM correctable error
+	  MCUMC_STATUS is a 64 bit register */
+	mc_umc_status =
+		RREG32(mc_umc_status_addr + umc_reg_offset);
+	mc_umc_status |=
+		(uint64_t)RREG32(mc_umc_status_addr + umc_reg_offset + 1) << 32;
+	if (REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, ErrorCodeExt) == 6 &&
+	    REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, Val) == 1 &&
+	    REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, CECC) == 1)
+		*error_count += 1;
+
+	/* clear the MCUMC_STATUS */
+	WREG32(mc_umc_status_addr + umc_reg_offset, 0);
+	WREG32(mc_umc_status_addr + umc_reg_offset + 1, 0);
+}
+
+static void umc_v6_1_querry_uncorrectable_error_count(struct amdgpu_device *adev,
+						      uint32_t umc_reg_offset,
+						      unsigned long *error_count)
+{
+	uint64_t mc_umc_status;
+	uint32_t mc_umc_status_addr;
+
+	mc_umc_status_addr =
+                SOC15_REG_OFFSET(UMC, 0, mmMCA_UMC_UMC0_MCUMC_STATUST0);
+
+	/* check the MCUMC_STATUS */
+	mc_umc_status = RREG32(mc_umc_status_addr + umc_reg_offset);
+	mc_umc_status |=
+		(uint64_t)RREG32(mc_umc_status_addr + umc_reg_offset + 1) << 32;
+
+	if (REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, Val) == 1 &&
+		REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, ErrorCodeExt) == 6 &&
+		(REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, UECC) == 1 ||
+		REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, PCC) == 1 ||
+		REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, UC) == 1 ||
+		REG_GET_FIELD(mc_umc_status, MCA_UMC_UMC0_MCUMC_STATUST0, TCC) == 1))
+		*error_count += 1;
+
+	/* clear the MCUMC_STATUS */
+	WREG32(mc_umc_status_addr + umc_reg_offset, 0);
+	WREG32(mc_umc_status_addr + umc_reg_offset + 1, 0);
+}
+
+static void umc_v6_1_query_ras_error_count(struct amdgpu_device *adev,
+					   void *ras_error_status)
+{
+	struct ras_err_data *err_data = (struct ras_err_data *)ras_error_status;
+	uint32_t umc_inst, channel_inst, umc_reg_offset;
+
+	for (umc_inst = 0; umc_inst < UMC_V6_1_UMC_INSTANCE_NUM; umc_inst++) {
+		/* enable the index mode to query eror count per channel */
+		umc_v6_1_enable_umc_index_mode(adev, umc_inst);
+		for (channel_inst = 0; channel_inst < UMC_V6_1_CHANNEL_INSTANCE_NUM; channel_inst++) {
+			/* calc the register offset according to channel instance */
+			umc_reg_offset = UMC_V6_1_PER_CHANNEL_OFFSET * channel_inst;
+			umc_v6_1_query_correctable_error_count(adev, umc_reg_offset,
+							       &(err_data->ce_count));
+			umc_v6_1_querry_uncorrectable_error_count(adev, umc_reg_offset,
+								  &(err_data->ue_count));
+		}
+	}
+	umc_v6_1_disable_umc_index_mode(adev);
+}
+
+const struct amdgpu_umc_funcs umc_v6_1_funcs = {
+	.query_ras_error_count = umc_v6_1_query_ras_error_count,
+};
diff --git a/drivers/gpu/drm/amd/amdgpu/umc_v6_1.h b/drivers/gpu/drm/amd/amdgpu/umc_v6_1.h
new file mode 100644
index 000000000000..d25ae414f4d8
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/umc_v6_1.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2019 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#ifndef __UMC_V6_1_H__
+#define __UMC_V6_1_H__
+
+#include "soc15_common.h"
+
+/* HBM  Memory Channel Width */
+#define UMC_V6_1_HBM_MEMORY_CHANNEL_WIDTH	128
+/* number of umc channel instance with memory map register access */
+#define UMC_V6_1_CHANNEL_INSTANCE_NUM		4
+/* number of umc instance with memory map register access */
+#define UMC_V6_1_UMC_INSTANCE_NUM		8
+/* UMC regiser per channel offset */
+#define UMC_V6_1_PER_CHANNEL_OFFSET		0x800
+
+extern const struct amdgpu_umc_funcs umc_v6_1_funcs;
+
+#endif
-- 
2.20.1

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