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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>
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Ariel Elior authored and David S. Miller committed Nov 13, 2011
1 parent 46fa130 commit 8304859
Showing 2 changed files with 26 additions and 1 deletion.
3 changes: 3 additions & 0 deletions drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
Original file line number Diff line number Diff line change
@@ -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 changes: 23 additions & 1 deletion drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
Original file line number Diff line number Diff line change
@@ -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 @@ static void bnx2x_sp_rtnl_task(struct work_struct *work)
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);

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