From 31d55c2d6672430f3ef0bfd4de72c5a4f6a8bab9 Mon Sep 17 00:00:00 2001 From: Hariprasad Shenai Date: Mon, 1 Sep 2014 19:54:58 +0530 Subject: [PATCH] cxgb4: Detect and display firmware reported errors The adapter firmware can indicate error conditions to the host. If the firmware has indicated an error, print out the reason for the firmware error. Based on original work by Casey Leedom Signed-off-by: Hariprasad Shenai Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 38 ++++++++++++++++++- drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h | 4 ++ 2 files changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c index 0250a9deb292..41d04462b72e 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c @@ -167,6 +167,34 @@ void t4_hw_pci_read_cfg4(struct adapter *adap, int reg, u32 *val) t4_write_reg(adap, PCIE_CFG_SPACE_REQ, 0); } +/* + * t4_report_fw_error - report firmware error + * @adap: the adapter + * + * The adapter firmware can indicate error conditions to the host. + * If the firmware has indicated an error, print out the reason for + * the firmware error. + */ +static void t4_report_fw_error(struct adapter *adap) +{ + static const char *const reason[] = { + "Crash", /* PCIE_FW_EVAL_CRASH */ + "During Device Preparation", /* PCIE_FW_EVAL_PREP */ + "During Device Configuration", /* PCIE_FW_EVAL_CONF */ + "During Device Initialization", /* PCIE_FW_EVAL_INIT */ + "Unexpected Event", /* PCIE_FW_EVAL_UNEXPECTEDEVENT */ + "Insufficient Airflow", /* PCIE_FW_EVAL_OVERHEAT */ + "Device Shutdown", /* PCIE_FW_EVAL_DEVICESHUTDOWN */ + "Reserved", /* reserved */ + }; + u32 pcie_fw; + + pcie_fw = t4_read_reg(adap, MA_PCIE_FW); + if (pcie_fw & FW_PCIE_FW_ERR) + dev_err(adap->pdev_dev, "Firmware reports adapter error: %s\n", + reason[FW_PCIE_FW_EVAL_GET(pcie_fw)]); +} + /* * Get the reply to a mailbox command and store it in @rpl in big-endian order. */ @@ -300,6 +328,7 @@ int t4_wr_mbox_meat(struct adapter *adap, int mbox, const void *cmd, int size, dump_mbox(adap, mbox, data_reg); dev_err(adap->pdev_dev, "command %#x in mailbox %d timed out\n", *(const u8 *)cmd, mbox); + t4_report_fw_error(adap); return -ETIMEDOUT; } @@ -1533,6 +1562,9 @@ static void cim_intr_handler(struct adapter *adapter) int fat; + if (t4_read_reg(adapter, MA_PCIE_FW) & FW_PCIE_FW_ERR) + t4_report_fw_error(adapter); + fat = t4_handle_intr_status(adapter, CIM_HOST_INT_CAUSE, cim_intr_info) + t4_handle_intr_status(adapter, CIM_HOST_UPACC_INT_CAUSE, @@ -2751,12 +2783,16 @@ retry: /* * Issue the HELLO command to the firmware. If it's not successful * but indicates that we got a "busy" or "timeout" condition, retry - * the HELLO until we exhaust our retry limit. + * the HELLO until we exhaust our retry limit. If we do exceed our + * retry limit, check to see if the firmware left us any error + * information and report that if so. */ ret = t4_wr_mbox(adap, mbox, &c, sizeof(c), &c); if (ret < 0) { if ((ret == -EBUSY || ret == -ETIMEDOUT) && retries-- > 0) goto retry; + if (t4_read_reg(adap, MA_PCIE_FW) & FW_PCIE_FW_ERR) + t4_report_fw_error(adap); return ret; } diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h index 5f2729ebadbe..3409756a85b9 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h +++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h @@ -2228,6 +2228,10 @@ struct fw_debug_cmd { #define FW_PCIE_FW_MASTER(x) ((x) << FW_PCIE_FW_MASTER_SHIFT) #define FW_PCIE_FW_MASTER_GET(x) (((x) >> FW_PCIE_FW_MASTER_SHIFT) & \ FW_PCIE_FW_MASTER_MASK) +#define FW_PCIE_FW_EVAL_MASK 0x7 +#define FW_PCIE_FW_EVAL_SHIFT 24 +#define FW_PCIE_FW_EVAL_GET(x) (((x) >> FW_PCIE_FW_EVAL_SHIFT) & \ + FW_PCIE_FW_EVAL_MASK) struct fw_hdr { u8 ver; -- 2.30.2