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Subject[PATCH net-next 14/14] net: hns3: add handling of RDMA RAS errors
Date
From: Shiju Jose <shiju.jose@huawei.com>

This patch handles the RDMA RAS errors.
1. Enable RAS interrupt, print error detail info and clear error status.
2. Do CORE reset to recovery when these non-fatal errors happened.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
.../net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h | 3 +
.../net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c | 185 ++++++++++++++++++++-
.../net/ethernet/hisilicon/hns3/hns3pf/hclge_err.h | 12 ++
3 files changed, 199 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
index eb91519..b1ee6fe 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h
@@ -229,6 +229,9 @@ enum hclge_opcode_type {
HCLGE_QUERY_MSIX_INT_STS_BD_NUM = 0x1513,
HCLGE_QUERY_CLEAR_ALL_MPF_MSIX_INT = 0x1514,
HCLGE_QUERY_CLEAR_ALL_PF_MSIX_INT = 0x1515,
+ HCLGE_CONFIG_ROCEE_RAS_INT_EN = 0x1580,
+ HCLGE_QUERY_CLEAR_ROCEE_RAS_INT = 0x1581,
+ HCLGE_ROCEE_PF_RAS_INT_CMD = 0x1584,
HCLGE_IGU_EGU_TNL_INT_EN = 0x1803,
HCLGE_IGU_COMMON_INT_EN = 0x1806,
HCLGE_TM_QCN_MEM_INT_CFG = 0x1A14,
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
index 660320d..2b52a51 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
@@ -337,6 +337,30 @@ static const struct hclge_hw_error hclge_ssu_port_based_pf_int[] = {
{ /* sentinel */ }
};

+static const struct hclge_hw_error hclge_rocee_qmm_ovf_err_int[] = {
+ { .int_msk = 0, .msg = "rocee qmm ovf: sgid invalid err" },
+ { .int_msk = 0x4, .msg = "rocee qmm ovf: sgid ovf err" },
+ { .int_msk = 0x8, .msg = "rocee qmm ovf: smac invalid err" },
+ { .int_msk = 0xC, .msg = "rocee qmm ovf: smac ovf err" },
+ { .int_msk = 0x10, .msg = "rocee qmm ovf: cqc invalid err" },
+ { .int_msk = 0x11, .msg = "rocee qmm ovf: cqc ovf err" },
+ { .int_msk = 0x12, .msg = "rocee qmm ovf: cqc hopnum err" },
+ { .int_msk = 0x13, .msg = "rocee qmm ovf: cqc ba0 err" },
+ { .int_msk = 0x14, .msg = "rocee qmm ovf: srqc invalid err" },
+ { .int_msk = 0x15, .msg = "rocee qmm ovf: srqc ovf err" },
+ { .int_msk = 0x16, .msg = "rocee qmm ovf: srqc hopnum err" },
+ { .int_msk = 0x17, .msg = "rocee qmm ovf: srqc ba0 err" },
+ { .int_msk = 0x18, .msg = "rocee qmm ovf: mpt invalid err" },
+ { .int_msk = 0x19, .msg = "rocee qmm ovf: mpt ovf err" },
+ { .int_msk = 0x1A, .msg = "rocee qmm ovf: mpt hopnum err" },
+ { .int_msk = 0x1B, .msg = "rocee qmm ovf: mpt ba0 err" },
+ { .int_msk = 0x1C, .msg = "rocee qmm ovf: qpc invalid err" },
+ { .int_msk = 0x1D, .msg = "rocee qmm ovf: qpc ovf err" },
+ { .int_msk = 0x1E, .msg = "rocee qmm ovf: qpc hopnum err" },
+ { .int_msk = 0x1F, .msg = "rocee qmm ovf: qpc ba0 err" },
+ { /* sentinel */ }
+};
+
static void hclge_log_error(struct device *dev, char *reg,
const struct hclge_hw_error *err,
u32 err_sts)
@@ -1023,6 +1047,148 @@ static int hclge_handle_all_ras_errors(struct hclge_dev *hdev)
return ret;
}

+static int hclge_log_rocee_ovf_error(struct hclge_dev *hdev)
+{
+ struct device *dev = &hdev->pdev->dev;
+ struct hclge_desc desc[2];
+ int ret;
+
+ /* read overflow error status */
+ ret = hclge_cmd_query_error(hdev, &desc[0],
+ HCLGE_ROCEE_PF_RAS_INT_CMD,
+ 0, 0, 0);
+ if (ret) {
+ dev_err(dev, "failed(%d) to query ROCEE OVF error sts\n", ret);
+ return ret;
+ }
+
+ /* log overflow error */
+ if (le32_to_cpu(desc[0].data[0]) & HCLGE_ROCEE_OVF_ERR_INT_MASK) {
+ const struct hclge_hw_error *err;
+ u32 err_sts;
+
+ err = &hclge_rocee_qmm_ovf_err_int[0];
+ err_sts = HCLGE_ROCEE_OVF_ERR_TYPE_MASK &
+ le32_to_cpu(desc[0].data[0]);
+ while (err->msg) {
+ if (err->int_msk == err_sts) {
+ dev_warn(dev, "%s [error status=0x%x] found\n",
+ err->msg,
+ le32_to_cpu(desc[0].data[0]));
+ break;
+ }
+ err++;
+ }
+ }
+
+ if (le32_to_cpu(desc[0].data[1]) & HCLGE_ROCEE_OVF_ERR_INT_MASK) {
+ dev_warn(dev, "ROCEE TSP OVF [error status=0x%x] found\n",
+ le32_to_cpu(desc[0].data[1]));
+ }
+
+ if (le32_to_cpu(desc[0].data[2]) & HCLGE_ROCEE_OVF_ERR_INT_MASK) {
+ dev_warn(dev, "ROCEE SCC OVF [error status=0x%x] found\n",
+ le32_to_cpu(desc[0].data[2]));
+ }
+
+ return 0;
+}
+
+static int hclge_log_and_clear_rocee_ras_error(struct hclge_dev *hdev)
+{
+ enum hnae3_reset_type reset_type = HNAE3_FUNC_RESET;
+ struct hnae3_ae_dev *ae_dev = hdev->ae_dev;
+ struct device *dev = &hdev->pdev->dev;
+ struct hclge_desc desc[2];
+ unsigned int status;
+ int ret;
+
+ /* read RAS error interrupt status */
+ ret = hclge_cmd_query_error(hdev, &desc[0],
+ HCLGE_QUERY_CLEAR_ROCEE_RAS_INT,
+ 0, 0, 0);
+ if (ret) {
+ dev_err(dev, "failed(%d) to query ROCEE RAS INT SRC\n", ret);
+ /* reset everything for now */
+ HCLGE_SET_DEFAULT_RESET_REQUEST(HNAE3_GLOBAL_RESET);
+ return ret;
+ }
+
+ status = le32_to_cpu(desc[0].data[0]);
+
+ if (status & HCLGE_ROCEE_RERR_INT_MASK)
+ dev_warn(dev, "ROCEE RAS AXI rresp error\n");
+
+ if (status & HCLGE_ROCEE_BERR_INT_MASK)
+ dev_warn(dev, "ROCEE RAS AXI bresp error\n");
+
+ if (status & HCLGE_ROCEE_ECC_INT_MASK) {
+ dev_warn(dev, "ROCEE RAS 2bit ECC error\n");
+ reset_type = HNAE3_GLOBAL_RESET;
+ }
+
+ if (status & HCLGE_ROCEE_OVF_INT_MASK) {
+ ret = hclge_log_rocee_ovf_error(hdev);
+ if (ret) {
+ dev_err(dev, "failed(%d) to process ovf error\n", ret);
+ /* reset everything for now */
+ HCLGE_SET_DEFAULT_RESET_REQUEST(HNAE3_GLOBAL_RESET);
+ return ret;
+ }
+ }
+
+ /* clear error status */
+ hclge_cmd_reuse_desc(&desc[0], false);
+ ret = hclge_cmd_send(&hdev->hw, &desc[0], 1);
+ if (ret) {
+ dev_err(dev, "failed(%d) to clear ROCEE RAS error\n", ret);
+ /* reset everything for now */
+ reset_type = HNAE3_GLOBAL_RESET;
+ }
+
+ HCLGE_SET_DEFAULT_RESET_REQUEST(reset_type);
+
+ return ret;
+}
+
+static int hclge_config_rocee_ras_interrupt(struct hclge_dev *hdev, bool en)
+{
+ struct device *dev = &hdev->pdev->dev;
+ struct hclge_desc desc;
+ int ret;
+
+ if (hdev->pdev->revision < 0x21 || !hnae3_dev_roce_supported(hdev))
+ return 0;
+
+ hclge_cmd_setup_basic_desc(&desc, HCLGE_CONFIG_ROCEE_RAS_INT_EN, false);
+ if (en) {
+ /* enable ROCEE hw error interrupts */
+ desc.data[0] = cpu_to_le32(HCLGE_ROCEE_RAS_NFE_INT_EN);
+ desc.data[1] = cpu_to_le32(HCLGE_ROCEE_RAS_CE_INT_EN);
+
+ hclge_log_and_clear_rocee_ras_error(hdev);
+ }
+ desc.data[2] = cpu_to_le32(HCLGE_ROCEE_RAS_NFE_INT_EN_MASK);
+ desc.data[3] = cpu_to_le32(HCLGE_ROCEE_RAS_CE_INT_EN_MASK);
+
+ ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+ if (ret)
+ dev_err(dev, "failed(%d) to config ROCEE RAS interrupt\n", ret);
+
+ return ret;
+}
+
+static int hclge_handle_rocee_ras_error(struct hnae3_ae_dev *ae_dev)
+{
+ struct hclge_dev *hdev = ae_dev->priv;
+
+ if (test_bit(HCLGE_STATE_RST_HANDLING, &hdev->state) ||
+ hdev->pdev->revision < 0x21)
+ return HNAE3_NONE_RESET;
+
+ return hclge_log_and_clear_rocee_ras_error(hdev);
+}
+
static const struct hclge_hw_blk hw_blk[] = {
{
.msk = BIT(0), .name = "IGU_EGU",
@@ -1058,6 +1224,7 @@ static const struct hclge_hw_blk hw_blk[] = {
int hclge_hw_error_set_state(struct hclge_dev *hdev, bool state)
{
const struct hclge_hw_blk *module = hw_blk;
+ struct device *dev = &hdev->pdev->dev;
int ret = 0;

while (module->name) {
@@ -1069,6 +1236,10 @@ int hclge_hw_error_set_state(struct hclge_dev *hdev, bool state)
module++;
}

+ ret = hclge_config_rocee_ras_interrupt(hdev, state);
+ if (ret)
+ dev_err(dev, "fail(%d) to configure ROCEE err int\n", ret);
+
return ret;
}

@@ -1086,9 +1257,21 @@ pci_ers_result_t hclge_handle_hw_ras_error(struct hnae3_ae_dev *ae_dev)
"HNS Non-Fatal RAS error(status=0x%x) identified\n",
status);
hclge_handle_all_ras_errors(hdev);
- return PCI_ERS_RESULT_NEED_RESET;
+ } else {
+ if (test_bit(HCLGE_STATE_RST_HANDLING, &hdev->state) ||
+ hdev->pdev->revision < 0x21)
+ return PCI_ERS_RESULT_RECOVERED;
+ }
+
+ if (status & HCLGE_RAS_REG_ROCEE_ERR_MASK) {
+ dev_warn(dev, "ROCEE uncorrected RAS error identified\n");
+ hclge_handle_rocee_ras_error(ae_dev);
}

+ if (status & HCLGE_RAS_REG_NFE_MASK ||
+ status & HCLGE_RAS_REG_ROCEE_ERR_MASK)
+ return PCI_ERS_RESULT_NEED_RESET;
+
return PCI_ERS_RESULT_RECOVERED;
}

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.h
index d2077f2..51a7d4e 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.h
@@ -8,6 +8,7 @@

#define HCLGE_RAS_PF_OTHER_INT_STS_REG 0x20B00
#define HCLGE_RAS_REG_NFE_MASK 0xFF00
+#define HCLGE_RAS_REG_ROCEE_ERR_MASK 0x3000000

#define HCLGE_VECTOR0_PF_OTHER_INT_STS_REG 0x20800
#define HCLGE_VECTOR0_REG_MSIX_MASK 0x1FF00
@@ -83,6 +84,17 @@
#define HCLGE_QCN_ECC_INT_MASK GENMASK(21, 0)
#define HCLGE_NCSI_ECC_INT_MASK GENMASK(1, 0)

+#define HCLGE_ROCEE_RAS_NFE_INT_EN 0xF
+#define HCLGE_ROCEE_RAS_CE_INT_EN 0x1
+#define HCLGE_ROCEE_RAS_NFE_INT_EN_MASK 0xF
+#define HCLGE_ROCEE_RAS_CE_INT_EN_MASK 0x1
+#define HCLGE_ROCEE_RERR_INT_MASK BIT(0)
+#define HCLGE_ROCEE_BERR_INT_MASK BIT(1)
+#define HCLGE_ROCEE_ECC_INT_MASK BIT(2)
+#define HCLGE_ROCEE_OVF_INT_MASK BIT(3)
+#define HCLGE_ROCEE_OVF_ERR_INT_MASK 0x10000
+#define HCLGE_ROCEE_OVF_ERR_TYPE_MASK 0x3F
+
enum hclge_err_int_type {
HCLGE_ERR_INT_MSIX = 0,
HCLGE_ERR_INT_RAS_CE = 1,
--
2.7.4

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