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bnx2x: add fan failure event handling

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Shut down the device in case of fan failure to prevent HW damage.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ariel Elior 2011-11-13 04:34:29 +00:00 • committed by David S. Miller
commit 8304859adc
2 changed files with 26 additions and 1 deletions
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3
drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
View file

@ -1141,6 +1141,7 @@ struct bnx2x_fw_stats_data {
enum {
BNX2X_SP_RTNL_SETUP_TC,
BNX2X_SP_RTNL_TX_TIMEOUT,
BNX2X_SP_RTNL_FAN_FAILURE,
};
@ -2048,6 +2049,8 @@ static inline u32 reg_poll(struct bnx2x *bp, u32 reg, u32 expected, int ms,
#define BNX2X_VPD_LEN 128
#define VENDOR_ID_LEN 4
int bnx2x_close(struct net_device *dev);
/* Congestion management fairness mode */
#define CMNG_FNS_NONE 0
#define CMNG_FNS_MINMAX 1

24
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
View file

@ -3299,6 +3299,17 @@ static inline void bnx2x_fan_failure(struct bnx2x *bp)
netdev_err(bp->dev, "Fan Failure on Network Controller has caused"
" the driver to shutdown the card to prevent permanent"
" damage. Please contact OEM Support for assistance\n");
/*
* Scheudle device reset (unload)
* This is due to some boards consuming sufficient power when driver is
* up to overheat if fan fails.
*/
smp_mb__before_clear_bit();
set_bit(BNX2X_SP_RTNL_FAN_FAILURE, &bp->sp_rtnl_state);
smp_mb__after_clear_bit();
schedule_delayed_work(&bp->sp_rtnl_task, 0);
}
static inline void bnx2x_attn_int_deasserted0(struct bnx2x *bp, u32 attn)
@ -8503,6 +8514,17 @@ sp_rtnl_not_reset:
if (test_and_clear_bit(BNX2X_SP_RTNL_SETUP_TC, &bp->sp_rtnl_state))
bnx2x_setup_tc(bp->dev, bp->dcbx_port_params.ets.num_of_cos);
/*
* in case of fan failure we need to reset id if the "stop on error"
* debug flag is set, since we trying to prevent permanent overheating
* damage
*/
if (test_and_clear_bit(BNX2X_SP_RTNL_FAN_FAILURE, &bp->sp_rtnl_state)) {
DP(BNX2X_MSG_SP, "fan failure detected. Unloading driver");
netif_device_detach(bp->dev);
bnx2x_close(bp->dev);
}
sp_rtnl_exit:
rtnl_unlock();
}
@ -9969,7 +9991,7 @@ static int bnx2x_open(struct net_device *dev)
}
/* called with rtnl_lock */
static int bnx2x_close(struct net_device *dev)
int bnx2x_close(struct net_device *dev)
{
struct bnx2x *bp = netdev_priv(dev);