diff options
| author | Divy Le Ray <divy@chelsio.com> | 2007-02-24 16:44:12 -0800 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-02-27 04:27:12 -0500 |
| commit | bae73f44472921008f8d0982344c53ae231445a1 (patch) | |
| tree | 11d1fe507ac8e179803c9468791952c9c217f66b /drivers | |
| parent | 99d7cf30b99a8b7863090d8a510d6a4d9ad082cf (diff) | |
| download | linux-bae73f44472921008f8d0982344c53ae231445a1.tar.gz | |
cxgb3 - Recovery from HW starvation of response queue entries.
Improve the traffic recovery after the HW ran out of response queue entries.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/cxgb3/adapter.h | 2 | ||||
| -rw-r--r-- | drivers/net/cxgb3/sge.c | 15 |
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/net/cxgb3/adapter.h b/drivers/net/cxgb3/adapter.h index 5c97a64451ce..01b99b901434 100644 --- a/drivers/net/cxgb3/adapter.h +++ b/drivers/net/cxgb3/adapter.h @@ -121,6 +121,8 @@ struct sge_rspq { /* state for an SGE response queue */ unsigned long empty; /* # of times queue ran out of credits */ unsigned long nomem; /* # of responses deferred due to no mem */ unsigned long unhandled_irqs; /* # of spurious intrs */ + unsigned long starved; + unsigned long restarted; }; struct tx_desc; diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c index 822a598c0db1..4ff0ab60c6c7 100644 --- a/drivers/net/cxgb3/sge.c +++ b/drivers/net/cxgb3/sge.c @@ -2376,13 +2376,26 @@ static void sge_timer_cb(unsigned long data) spin_unlock(&qs->txq[TXQ_OFLD].lock); } lock = (adap->flags & USING_MSIX) ? &qs->rspq.lock : - &adap->sge.qs[0].rspq.lock; + &adap->sge.qs[0].rspq.lock; if (spin_trylock_irq(lock)) { if (!napi_is_scheduled(qs->netdev)) { + u32 status = t3_read_reg(adap, A_SG_RSPQ_FL_STATUS); + if (qs->fl[0].credits < qs->fl[0].size) __refill_fl(adap, &qs->fl[0]); if (qs->fl[1].credits < qs->fl[1].size) __refill_fl(adap, &qs->fl[1]); + + if (status & (1 << qs->rspq.cntxt_id)) { + qs->rspq.starved++; + if (qs->rspq.credits) { + refill_rspq(adap, &qs->rspq, 1); + qs->rspq.credits--; + qs->rspq.restarted++; + t3_write_reg(adap, A_SG_RSPQ_FL_STATUS, + 1 << qs->rspq.cntxt_id); + } + } } spin_unlock_irq(lock); } |