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[BNX2]: Enhance the heartbeat.

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In addition to the periodic heartbeat, we're adding a heartbeat
request interrupt when the heartbeat is late.  This is needed during
netpoll where the timer is not available.  -rt kernels will also
benefit since the timer is not as accurate.

[ We discussed this patch last time and we decided that the -rt
  kernel problem alone did not justify this patch.  I think the
  netpoll problem makes this patch necessary. ]

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2007-07-07 22:51:36 -07:00 committed by David S. Miller
parent b8a7ce7bed
commit df149d70e1
2 changed files with 25 additions and 4 deletions
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26
drivers/net/bnx2.c
View file

@ -1486,6 +1486,20 @@ bnx2_set_default_link(struct bnx2 *bp)
bp->advertising = ETHTOOL_ALL_COPPER_SPEED | ADVERTISED_Autoneg;
}
static void
bnx2_send_heart_beat(struct bnx2 *bp)
{
u32 msg;
u32 addr;
spin_lock(&bp->indirect_lock);
msg = (u32) (++bp->fw_drv_pulse_wr_seq & BNX2_DRV_PULSE_SEQ_MASK);
addr = bp->shmem_base + BNX2_DRV_PULSE_MB;
REG_WR(bp, BNX2_PCICFG_REG_WINDOW_ADDRESS, addr);
REG_WR(bp, BNX2_PCICFG_REG_WINDOW, msg);
spin_unlock(&bp->indirect_lock);
}
static void
bnx2_remote_phy_event(struct bnx2 *bp)
{
@ -1495,6 +1509,11 @@ bnx2_remote_phy_event(struct bnx2 *bp)
msg = REG_RD_IND(bp, bp->shmem_base + BNX2_LINK_STATUS);
if (msg & BNX2_LINK_STATUS_HEART_BEAT_EXPIRED)
bnx2_send_heart_beat(bp);
msg &= ~BNX2_LINK_STATUS_HEART_BEAT_EXPIRED;
if ((msg & BNX2_LINK_STATUS_LINK_UP) == BNX2_LINK_STATUS_LINK_DOWN)
bp->link_up = 0;
else {
@ -1572,6 +1591,7 @@ bnx2_set_remote_link(struct bnx2 *bp)
break;
case BNX2_FW_EVT_CODE_SW_TIMER_EXPIRATION_EVENT:
default:
bnx2_send_heart_beat(bp);
break;
}
return 0;
@ -4122,7 +4142,7 @@ bnx2_init_chip(struct bnx2 *bp)
rc = bnx2_fw_sync(bp, BNX2_DRV_MSG_DATA_WAIT2 | BNX2_DRV_MSG_CODE_RESET,
0);
REG_WR(bp, BNX2_MISC_ENABLE_SET_BITS, 0x5ffffff);
REG_WR(bp, BNX2_MISC_ENABLE_SET_BITS, BNX2_MISC_ENABLE_DEFAULT);
REG_RD(bp, BNX2_MISC_ENABLE_SET_BITS);
udelay(20);
@ -4930,7 +4950,6 @@ static void
bnx2_timer(unsigned long data)
{
struct bnx2 *bp = (struct bnx2 *) data;
u32 msg;
if (!netif_running(bp->dev))
return;
@ -4938,8 +4957,7 @@ bnx2_timer(unsigned long data)
if (atomic_read(&bp->intr_sem) != 0)
goto bnx2_restart_timer;
msg = (u32) ++bp->fw_drv_pulse_wr_seq;
REG_WR_IND(bp, bp->shmem_base + BNX2_DRV_PULSE_MB, msg);
bnx2_send_heart_beat(bp);
bp->stats_blk->stat_FwRxDrop = REG_RD_IND(bp, BNX2_FW_RX_DROP_COUNT);

3
drivers/net/bnx2.h
View file

@ -6338,6 +6338,8 @@ struct l2_fhdr {
#define RX_COPY_THRESH 92
#define BNX2_MISC_ENABLE_DEFAULT 0x7ffffff
#define DMA_READ_CHANS 5
#define DMA_WRITE_CHANS 3
@ -6839,6 +6841,7 @@ struct fw_info {
#define BNX2_LINK_STATUS_SERDES_LINK (1<<20)
#define BNX2_LINK_STATUS_PARTNER_AD_2500FULL (1<<21)
#define BNX2_LINK_STATUS_PARTNER_AD_2500HALF (1<<22)
#define BNX2_LINK_STATUS_HEART_BEAT_EXPIRED (1<<31)
#define BNX2_DRV_PULSE_MB 0x00000010
#define BNX2_DRV_PULSE_SEQ_MASK 0x00007fff