From 673c96e5af99b6f8eab3ce37afa11cb28c14cf2f Mon Sep 17 00:00:00 2001 From: Suresh Reddy Date: Wed, 24 May 2017 22:24:38 -0400 Subject: [PATCH] be2net: Fix UE detection logic for BE3 On certain platforms BE3 chips may indicate spurious UEs (unrecoverable error). Because of the UE detection logic was disabled in the driver for BE3 chips. Because of this, even in cases of a real UE, a failover will not occur. This patch re-enables UE detection on BE3 and if a UE is detected, reads the POST register. If the POST register, reports either a FAT_LOG_STATE or a ARMFW_UE, then it means that a valid UE occurred in the chip. Signed-off-by: Suresh Reddy Signed-off-by: David S. Miller --- drivers/net/ethernet/emulex/benet/be_hw.h | 3 +++ drivers/net/ethernet/emulex/benet/be_main.c | 27 +++++++++++++++------ 2 files changed, 22 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/emulex/benet/be_hw.h b/drivers/net/ethernet/emulex/benet/be_hw.h index 36e4232ed6b8..c967f45705d9 100644 --- a/drivers/net/ethernet/emulex/benet/be_hw.h +++ b/drivers/net/ethernet/emulex/benet/be_hw.h @@ -49,6 +49,9 @@ #define POST_STAGE_BE_RESET 0x3 /* Host wants to reset chip */ #define POST_STAGE_ARMFW_RDY 0xc000 /* FW is done with POST */ #define POST_STAGE_RECOVERABLE_ERR 0xE000 /* Recoverable err detected */ +/* FW has detected a UE and is dumping FAT log data */ +#define POST_STAGE_FAT_LOG_START 0x0D00 +#define POST_STAGE_ARMFW_UE 0xF000 /*FW has asserted an UE*/ /* Lancer SLIPORT registers */ #define SLIPORT_STATUS_OFFSET 0x404 diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index f3a09ab55900..800055113583 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -3241,8 +3241,9 @@ void be_detect_error(struct be_adapter *adapter) { u32 ue_lo = 0, ue_hi = 0, ue_lo_mask = 0, ue_hi_mask = 0; u32 sliport_status = 0, sliport_err1 = 0, sliport_err2 = 0; - u32 i; struct device *dev = &adapter->pdev->dev; + u16 val; + u32 i; if (be_check_error(adapter, BE_ERROR_HW)) return; @@ -3280,15 +3281,25 @@ void be_detect_error(struct be_adapter *adapter) ue_lo = (ue_lo & ~ue_lo_mask); ue_hi = (ue_hi & ~ue_hi_mask); - /* On certain platforms BE hardware can indicate spurious UEs. - * Allow HW to stop working completely in case of a real UE. - * Hence not setting the hw_error for UE detection. - */ - if (ue_lo || ue_hi) { + /* On certain platforms BE3 hardware can indicate + * spurious UEs. In case of a UE in the chip, + * the POST register correctly reports either a + * FAT_LOG_START state (FW is currently dumping + * FAT log data) or a ARMFW_UE state. Check for the + * above states to ascertain if the UE is valid or not. + */ + if (BE3_chip(adapter)) { + val = be_POST_stage_get(adapter); + if ((val & POST_STAGE_FAT_LOG_START) + != POST_STAGE_FAT_LOG_START && + (val & POST_STAGE_ARMFW_UE) + != POST_STAGE_ARMFW_UE) + return; + } + dev_err(dev, "Error detected in the adapter"); - if (skyhawk_chip(adapter)) - be_set_error(adapter, BE_ERROR_UE); + be_set_error(adapter, BE_ERROR_UE); for (i = 0; ue_lo; ue_lo >>= 1, i++) { if (ue_lo & 1) -- 2.20.1