[PATCH 3/6] drm/amdgpu: add helper funcs to detect PCS error

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Since from vega20, hardware supports run-time detect
and report XGMI/WAFL PCS ras error. Add helper functions
to walkthrough every type of ras error and report it if
any.

Signed-off-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Reviewed-by: Guchun Chen <guchun.chen@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 173 +++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h |   8 ++
 2 files changed, 181 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index fbc41926de08..61a28f8ec34e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -26,7 +26,12 @@
 #include "amdgpu_xgmi.h"
 #include "amdgpu_smu.h"
 #include "amdgpu_ras.h"
+#include "soc15.h"
 #include "df/df_3_6_offset.h"
+#include "xgmi/xgmi_4_0_0_smn.h"
+#include "xgmi/xgmi_4_0_0_sh_mask.h"
+#include "wafl/wafl2_4_0_0_smn.h"
+#include "wafl/wafl2_4_0_0_sh_mask.h"
 
 static DEFINE_MUTEX(xgmi_mutex);
 
@@ -36,6 +41,94 @@ static DEFINE_MUTEX(xgmi_mutex);
 static struct amdgpu_hive_info xgmi_hives[AMDGPU_MAX_XGMI_HIVE];
 static unsigned hive_count = 0;
 
+static const int xgmi_pcs_err_status_reg_vg20[] = {
+	smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS,
+	smnXGMI0_PCS_GOPX16_PCS_ERROR_STATUS + 0x100000,
+};
+
+static const int wafl_pcs_err_status_reg_vg20[] = {
+	smnPCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS,
+	smnPCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS + 0x100000,
+};
+
+static const struct amdgpu_pcs_ras_field xgmi_pcs_ras_fields[] = {
+	{"XGMI PCS DataLossErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, DataLossErr)},
+	{"XGMI PCS TrainingErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, TrainingErr)},
+	{"XGMI PCS CRCErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, CRCErr)},
+	{"XGMI PCS BERExceededErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, BERExceededErr)},
+	{"XGMI PCS TxMetaDataErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, TxMetaDataErr)},
+	{"XGMI PCS ReplayBufParityErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReplayBufParityErr)},
+	{"XGMI PCS DataParityErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, DataParityErr)},
+	{"XGMI PCS ReplayFifoOverflowErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReplayFifoOverflowErr)},
+	{"XGMI PCS ReplayFifoUnderflowErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReplayFifoUnderflowErr)},
+	{"XGMI PCS ElasticFifoOverflowErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ElasticFifoOverflowErr)},
+	{"XGMI PCS DeskewErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, DeskewErr)},
+	{"XGMI PCS DataStartupLimitErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, DataStartupLimitErr)},
+	{"XGMI PCS FCInitTimeoutErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, FCInitTimeoutErr)},
+	{"XGMI PCS RecoveryTimeoutErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, RecoveryTimeoutErr)},
+	{"XGMI PCS ReadySerialTimeoutErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReadySerialTimeoutErr)},
+	{"XGMI PCS ReadySerialAttemptErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, ReadySerialAttemptErr)},
+	{"XGMI PCS RecoveryAttemptErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, RecoveryAttemptErr)},
+	{"XGMI PCS RecoveryRelockAttemptErr",
+	 SOC15_REG_FIELD(XGMI0_PCS_GOPX16_PCS_ERROR_STATUS, RecoveryRelockAttemptErr)},
+};
+
+static const struct amdgpu_pcs_ras_field wafl_pcs_ras_fields[] = {
+	{"WAFL PCS DataLossErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, DataLossErr)},
+	{"WAFL PCS TrainingErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, TrainingErr)},
+	{"WAFL PCS CRCErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, CRCErr)},
+	{"WAFL PCS BERExceededErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, BERExceededErr)},
+	{"WAFL PCS TxMetaDataErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, TxMetaDataErr)},
+	{"WAFL PCS ReplayBufParityErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReplayBufParityErr)},
+	{"WAFL PCS DataParityErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, DataParityErr)},
+	{"WAFL PCS ReplayFifoOverflowErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReplayFifoOverflowErr)},
+	{"WAFL PCS ReplayFifoUnderflowErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReplayFifoUnderflowErr)},
+	{"WAFL PCS ElasticFifoOverflowErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ElasticFifoOverflowErr)},
+	{"WAFL PCS DeskewErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, DeskewErr)},
+	{"WAFL PCS DataStartupLimitErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, DataStartupLimitErr)},
+	{"WAFL PCS FCInitTimeoutErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, FCInitTimeoutErr)},
+	{"WAFL PCS RecoveryTimeoutErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, RecoveryTimeoutErr)},
+	{"WAFL PCS ReadySerialTimeoutErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReadySerialTimeoutErr)},
+	{"WAFL PCS ReadySerialAttemptErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, ReadySerialAttemptErr)},
+	{"WAFL PCS RecoveryAttemptErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, RecoveryAttemptErr)},
+	{"WAFL PCS RecoveryRelockAttemptErr",
+	 SOC15_REG_FIELD(PCS_GOPX1_0_PCS_GOPX1_PCS_ERROR_STATUS, RecoveryRelockAttemptErr)},
+};
+
 void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive)
 {
 	return &hive->device_list;
@@ -530,3 +623,83 @@ void amdgpu_xgmi_ras_fini(struct amdgpu_device *adev)
 		kfree(ras_if);
 	}
 }
+
+static int amdgpu_xgmi_query_pcs_error_status(struct amdgpu_device *adev,
+					      uint32_t value,
+					      uint32_t *ue_count,
+					      uint32_t *ce_count,
+					      bool is_xgmi_pcs)
+{
+	int i;
+	int ue_cnt;
+
+	if (is_xgmi_pcs) {
+		/* query xgmi pcs error status,
+		 * only ue is supported */
+		for (i = 0; i < ARRAY_SIZE(xgmi_pcs_ras_fields); i ++) {
+			ue_cnt = (value &
+				xgmi_pcs_ras_fields[i].pcs_err_mask) >>
+				xgmi_pcs_ras_fields[i].pcs_err_shift;
+			if (ue_cnt) {
+				dev_info(adev->dev, "%s detected\n",
+					xgmi_pcs_ras_fields[i].err_name);
+				*ue_count += ue_cnt;
+			}
+		}
+	} else {
+		/* query wafl pcs error status,
+		 * only ue is supported */
+		for (i = 0; i < ARRAY_SIZE(wafl_pcs_ras_fields); i++) {
+			ue_cnt = (value &
+				wafl_pcs_ras_fields[i].pcs_err_mask) >>
+				wafl_pcs_ras_fields[i].pcs_err_shift;
+			if (ue_cnt) {
+				dev_info(adev->dev, "%s detected\n",
+					wafl_pcs_ras_fields[i].err_name);
+				*ue_count += ue_cnt;
+			}
+		}
+	}
+
+	return 0;
+}
+
+int amdgpu_xgmi_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;
+	int i;
+	uint32_t data;
+	uint32_t ue_cnt = 0, ce_cnt = 0;
+
+	if (!amdgpu_ras_is_supported(adev, AMDGPU_RAS_BLOCK__XGMI_WAFL))
+		return -EINVAL;
+
+	err_data->ue_count = 0;
+	err_data->ce_count = 0;
+
+	switch (adev->asic_type) {
+	case CHIP_VEGA20:
+	default:
+		/* check xgmi pcs error */
+		for (i = 0; i < ARRAY_SIZE(xgmi_pcs_err_status_reg_vg20); i++) {
+			data = RREG32_PCIE(xgmi_pcs_err_status_reg_vg20[i]);
+			if (data)
+				amdgpu_xgmi_query_pcs_error_status(adev,
+						data, &ue_cnt, &ce_cnt, true);
+		}
+		/* check wafl pcs error */
+		for (i = 0; i < ARRAY_SIZE(wafl_pcs_err_status_reg_vg20); i++) {
+			data = RREG32_PCIE(wafl_pcs_err_status_reg_vg20[i]);
+			if (data)
+				amdgpu_xgmi_query_pcs_error_status(adev,
+                                                data, &ue_cnt, &ce_cnt, false);
+		}
+		break;
+	}
+
+	err_data->ue_count += ue_cnt;
+	err_data->ce_count += ce_cnt;
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
index c62a4acf4c14..ae78b7f74776 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
@@ -37,6 +37,12 @@ struct amdgpu_hive_info {
 	struct task_barrier tb;
 };
 
+struct amdgpu_pcs_ras_field {
+	const char *err_name;
+	uint32_t pcs_err_mask;
+	uint32_t pcs_err_shift;
+};
+
 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lock);
 int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev);
 int amdgpu_xgmi_add_device(struct amdgpu_device *adev);
@@ -46,6 +52,8 @@ int amdgpu_xgmi_get_hops_count(struct amdgpu_device *adev,
 		struct amdgpu_device *peer_adev);
 int amdgpu_xgmi_ras_late_init(struct amdgpu_device *adev);
 void amdgpu_xgmi_ras_fini(struct amdgpu_device *adev);
+int amdgpu_xgmi_query_ras_error_count(struct amdgpu_device *adev,
+				      void *ras_error_status);
 
 static inline bool amdgpu_xgmi_same_hive(struct amdgpu_device *adev,
 		struct amdgpu_device *bo_adev)
-- 
2.17.1

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