From fa2314081571f549bff4b2d7857603b2dada5c2f Mon Sep 17 00:00:00 2001 From: Xiaofei Tan Date: Tue, 24 Oct 2017 23:51:48 +0800 Subject: scsi: hisi_sas: add v3 hw support for AXI fatal error Add support for processing AXI bus fatal errors. If AXI bus fatal error happen, do controller reset to recover. Signed-off-by: Xiaofei Tan Signed-off-by: John Garry Signed-off-by: Martin K. Petersen --- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 125 +++++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) (limited to 'drivers/scsi') diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index 18cc3b4..f700482 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -53,6 +53,11 @@ #define HGC_IOMB_PROC1_STATUS 0x104 #define CFG_1US_TIMER_TRSH 0xcc #define CHNL_INT_STATUS 0x148 +#define HGC_AXI_FIFO_ERR_INFO 0x154 +#define AXI_ERR_INFO_OFF 0 +#define AXI_ERR_INFO_MSK (0xff << AXI_ERR_INFO_OFF) +#define FIFO_ERR_INFO_OFF 8 +#define FIFO_ERR_INFO_MSK (0xff << FIFO_ERR_INFO_OFF) #define INT_COAL_EN 0x19c #define OQ_INT_COAL_TIME 0x1a0 #define OQ_INT_COAL_CNT 0x1a4 @@ -1315,6 +1320,114 @@ static irqreturn_t int_chnl_int_v3_hw(int irq_no, void *p) return IRQ_HANDLED; } +static const struct hisi_sas_hw_error axi_error[] = { + { .msk = BIT(0), .msg = "IOST_AXI_W_ERR" }, + { .msk = BIT(1), .msg = "IOST_AXI_R_ERR" }, + { .msk = BIT(2), .msg = "ITCT_AXI_W_ERR" }, + { .msk = BIT(3), .msg = "ITCT_AXI_R_ERR" }, + { .msk = BIT(4), .msg = "SATA_AXI_W_ERR" }, + { .msk = BIT(5), .msg = "SATA_AXI_R_ERR" }, + { .msk = BIT(6), .msg = "DQE_AXI_R_ERR" }, + { .msk = BIT(7), .msg = "CQE_AXI_W_ERR" }, + {}, +}; + +static const struct hisi_sas_hw_error fifo_error[] = { + { .msk = BIT(8), .msg = "CQE_WINFO_FIFO" }, + { .msk = BIT(9), .msg = "CQE_MSG_FIFIO" }, + { .msk = BIT(10), .msg = "GETDQE_FIFO" }, + { .msk = BIT(11), .msg = "CMDP_FIFO" }, + { .msk = BIT(12), .msg = "AWTCTRL_FIFO" }, + {}, +}; + +static const struct hisi_sas_hw_error fatal_axi_error[] = { + { + .irq_msk = BIT(ENT_INT_SRC3_WP_DEPTH_OFF), + .msg = "write pointer and depth", + }, + { + .irq_msk = BIT(ENT_INT_SRC3_IPTT_SLOT_NOMATCH_OFF), + .msg = "iptt no match slot", + }, + { + .irq_msk = BIT(ENT_INT_SRC3_RP_DEPTH_OFF), + .msg = "read pointer and depth", + }, + { + .irq_msk = BIT(ENT_INT_SRC3_AXI_OFF), + .reg = HGC_AXI_FIFO_ERR_INFO, + .sub = axi_error, + }, + { + .irq_msk = BIT(ENT_INT_SRC3_FIFO_OFF), + .reg = HGC_AXI_FIFO_ERR_INFO, + .sub = fifo_error, + }, + { + .irq_msk = BIT(ENT_INT_SRC3_LM_OFF), + .msg = "LM add/fetch list", + }, + { + .irq_msk = BIT(ENT_INT_SRC3_ABT_OFF), + .msg = "SAS_HGC_ABT fetch LM list", + }, +}; + +static irqreturn_t fatal_axi_int_v3_hw(int irq_no, void *p) +{ + u32 irq_value, irq_msk; + struct hisi_hba *hisi_hba = p; + struct device *dev = hisi_hba->dev; + int i; + + irq_msk = hisi_sas_read32(hisi_hba, ENT_INT_SRC_MSK3); + hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK3, irq_msk | 0x1df00); + + irq_value = hisi_sas_read32(hisi_hba, ENT_INT_SRC3); + + for (i = 0; i < ARRAY_SIZE(fatal_axi_error); i++) { + const struct hisi_sas_hw_error *error = &fatal_axi_error[i]; + + if (!(irq_value & error->irq_msk)) + continue; + + if (error->sub) { + const struct hisi_sas_hw_error *sub = error->sub; + u32 err_value = hisi_sas_read32(hisi_hba, error->reg); + + for (; sub->msk || sub->msg; sub++) { + if (!(err_value & sub->msk)) + continue; + + dev_warn(dev, "%s error (0x%x) found!\n", + sub->msg, irq_value); + queue_work(hisi_hba->wq, &hisi_hba->rst_work); + } + } else { + dev_warn(dev, "%s error (0x%x) found!\n", + error->msg, irq_value); + queue_work(hisi_hba->wq, &hisi_hba->rst_work); + } + } + + if (irq_value & BIT(ENT_INT_SRC3_ITC_INT_OFF)) { + u32 reg_val = hisi_sas_read32(hisi_hba, ITCT_CLR); + u32 dev_id = reg_val & ITCT_DEV_MSK; + struct hisi_sas_device *sas_dev = + &hisi_hba->devices[dev_id]; + + hisi_sas_write32(hisi_hba, ITCT_CLR, 0); + dev_dbg(dev, "clear ITCT ok\n"); + complete(sas_dev->completion); + } + + hisi_sas_write32(hisi_hba, ENT_INT_SRC3, irq_value & 0x1df00); + hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK3, irq_msk); + + return IRQ_HANDLED; +} + static void slot_err_v3_hw(struct hisi_hba *hisi_hba, struct sas_task *task, struct hisi_sas_slot *slot) @@ -1615,6 +1728,15 @@ static int interrupt_init_v3_hw(struct hisi_hba *hisi_hba) goto free_phy_irq; } + rc = devm_request_irq(dev, pci_irq_vector(pdev, 11), + fatal_axi_int_v3_hw, 0, + DRV_NAME " fatal", hisi_hba); + if (rc) { + dev_err(dev, "could not request fatal interrupt, rc=%d\n", rc); + rc = -ENOENT; + goto free_chnl_interrupt; + } + /* Init tasklets for cq only */ for (i = 0; i < hisi_hba->queue_count; i++) { struct hisi_sas_cq *cq = &hisi_hba->cq[i]; @@ -1642,6 +1764,8 @@ free_cq_irqs: free_irq(pci_irq_vector(pdev, k+16), cq); } + free_irq(pci_irq_vector(pdev, 11), hisi_hba); +free_chnl_interrupt: free_irq(pci_irq_vector(pdev, 2), hisi_hba); free_phy_irq: free_irq(pci_irq_vector(pdev, 1), hisi_hba); @@ -1974,6 +2098,7 @@ hisi_sas_v3_destroy_irqs(struct pci_dev *pdev, struct hisi_hba *hisi_hba) free_irq(pci_irq_vector(pdev, 1), hisi_hba); free_irq(pci_irq_vector(pdev, 2), hisi_hba); + free_irq(pci_irq_vector(pdev, 11), hisi_hba); for (i = 0; i < hisi_hba->queue_count; i++) { struct hisi_sas_cq *cq = &hisi_hba->cq[i]; -- cgit v1.1