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cxgb4: Change default Interrupt Holdoff Packet Count Threshold

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Based on original work by Casey Leedom <leedom@chelsio.com>

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hariprasad Shenai 2014-06-06 21:40:45 +05:30 committed by David S. Miller
parent b408ff282d
commit c887ad0e22
2 changed files with 41 additions and 31 deletions
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71
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
View File

@ -2503,8 +2503,7 @@ static unsigned int qtimer_val(const struct adapter *adap,
}
/**
* set_rxq_intr_params - set a queue's interrupt holdoff parameters
* @adap: the adapter
* set_rspq_intr_params - set a queue's interrupt holdoff parameters
* @q: the Rx queue
* @us: the hold-off time in us, or 0 to disable timer
* @cnt: the hold-off packet count, or 0 to disable counter
@ -2512,9 +2511,11 @@ static unsigned int qtimer_val(const struct adapter *adap,
* Sets an Rx queue's interrupt hold-off time and packet count. At least
* one of the two needs to be enabled for the queue to generate interrupts.
*/
static int set_rxq_intr_params(struct adapter *adap, struct sge_rspq *q,
unsigned int us, unsigned int cnt)
static int set_rspq_intr_params(struct sge_rspq *q,
unsigned int us, unsigned int cnt)
{
struct adapter *adap = q->adap;
if ((us | cnt) == 0)
cnt = 1;
@ -2541,24 +2542,34 @@ static int set_rxq_intr_params(struct adapter *adap, struct sge_rspq *q,
return 0;
}
/**
* set_rx_intr_params - set a net devices's RX interrupt holdoff paramete!
* @dev: the network device
* @us: the hold-off time in us, or 0 to disable timer
* @cnt: the hold-off packet count, or 0 to disable counter
*
* Set the RX interrupt hold-off parameters for a network device.
*/
static int set_rx_intr_params(struct net_device *dev,
unsigned int us, unsigned int cnt)
{
int i, err;
struct port_info *pi = netdev_priv(dev);
struct adapter *adap = pi->adapter;
struct sge_eth_rxq *q = &adap->sge.ethrxq[pi->first_qset];
for (i = 0; i < pi->nqsets; i++, q++) {
err = set_rspq_intr_params(&q->rspq, us, cnt);
if (err)
return err;
}
return 0;
}
static int set_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
{
const struct port_info *pi = netdev_priv(dev);
struct adapter *adap = pi->adapter;
struct sge_rspq *q;
int i;
int r = 0;
for (i = pi->first_qset; i < pi->first_qset + pi->nqsets; i++) {
q = &adap->sge.ethrxq[i].rspq;
r = set_rxq_intr_params(adap, q, c->rx_coalesce_usecs,
c->rx_max_coalesced_frames);
if (r) {
dev_err(&dev->dev, "failed to set coalesce %d\n", r);
break;
}
}
return r;
return set_rx_intr_params(dev, c->rx_coalesce_usecs,
c->rx_max_coalesced_frames);
}
static int get_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
@ -5812,12 +5823,12 @@ static inline bool is_x_10g_port(const struct link_config *lc)
(lc->supported & FW_PORT_CAP_SPEED_40G) != 0;
}
static inline void init_rspq(struct sge_rspq *q, u8 timer_idx, u8 pkt_cnt_idx,
static inline void init_rspq(struct adapter *adap, struct sge_rspq *q,
unsigned int us, unsigned int cnt,
unsigned int size, unsigned int iqe_size)
{
q->intr_params = QINTR_TIMER_IDX(timer_idx) |
(pkt_cnt_idx < SGE_NCOUNTERS ? QINTR_CNT_EN : 0);
q->pktcnt_idx = pkt_cnt_idx < SGE_NCOUNTERS ? pkt_cnt_idx : 0;
q->adap = adap;
set_rspq_intr_params(q, us, cnt);
q->iqe_len = iqe_size;
q->size = size;
}
@ -5876,7 +5887,7 @@ static void cfg_queues(struct adapter *adap)
for (i = 0; i < ARRAY_SIZE(s->ethrxq); i++) {
struct sge_eth_rxq *r = &s->ethrxq[i];
init_rspq(&r->rspq, 0, 0, 1024, 64);
init_rspq(adap, &r->rspq, 5, 10, 1024, 64);
r->fl.size = 72;
}
@ -5892,7 +5903,7 @@ static void cfg_queues(struct adapter *adap)
for (i = 0; i < ARRAY_SIZE(s->ofldrxq); i++) {
struct sge_ofld_rxq *r = &s->ofldrxq[i];
init_rspq(&r->rspq, 0, 0, 1024, 64);
init_rspq(adap, &r->rspq, 5, 1, 1024, 64);
r->rspq.uld = CXGB4_ULD_ISCSI;
r->fl.size = 72;
}
@ -5900,7 +5911,7 @@ static void cfg_queues(struct adapter *adap)
for (i = 0; i < ARRAY_SIZE(s->rdmarxq); i++) {
struct sge_ofld_rxq *r = &s->rdmarxq[i];
init_rspq(&r->rspq, 0, 0, 511, 64);
init_rspq(adap, &r->rspq, 5, 1, 511, 64);
r->rspq.uld = CXGB4_ULD_RDMA;
r->fl.size = 72;
}
@ -5914,12 +5925,12 @@ static void cfg_queues(struct adapter *adap)
for (i = 0; i < ARRAY_SIZE(s->rdmaciq); i++) {
struct sge_ofld_rxq *r = &s->rdmaciq[i];
init_rspq(&r->rspq, 0, 0, ciq_size, 64);
init_rspq(adap, &r->rspq, 5, 1, ciq_size, 64);
r->rspq.uld = CXGB4_ULD_RDMA;
}
init_rspq(&s->fw_evtq, 6, 0, 512, 64);
init_rspq(&s->intrq, 6, 0, 2 * MAX_INGQ, 64);
init_rspq(adap, &s->fw_evtq, 0, 1, 1024, 64);
init_rspq(adap, &s->intrq, 0, 1, 2 * MAX_INGQ, 64);
}
/*

1
drivers/net/ethernet/chelsio/cxgb4/sge.c
View File

@ -2215,7 +2215,6 @@ int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
iq->cntxt_id = ntohs(c.iqid);
iq->abs_id = ntohs(c.physiqid);
iq->size--; /* subtract status entry */
iq->adap = adap;
iq->netdev = dev;
iq->handler = hnd;