cxgb4: Change default Interrupt Holdoff Packet Count Threshold

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>

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 5fa5f2a..2f8d6b9 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -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;
 }
 
-static int set_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
+/**
+ * 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)
 {
-       const struct port_info *pi = netdev_priv(dev);
+       int i, err;
+       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;
-               }
+       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 r;
+       return 0;
+}
+
+static int set_coalesce(struct net_device *dev, struct ethtool_coalesce *c)
+{
+       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);
 }
 
 /*

diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index bd82939..58bd213 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -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;