diff options
Diffstat (limited to 'drivers/net/ethernet/cisco/enic/enic_main.c')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/enic_main.c | 135 |
1 files changed, 67 insertions, 68 deletions
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index 918a8e42139b..8f646e4e968b 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -1149,6 +1149,64 @@ static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, return 0; } +static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) +{ + unsigned int intr = enic_msix_rq_intr(enic, rq->index); + struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; + u32 timer = cq->tobe_rx_coal_timeval; + + if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { + vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); + cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; + } +} + +static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) +{ + struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; + struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; + struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; + int index; + u32 timer; + u32 range_start; + u32 traffic; + u64 delta; + ktime_t now = ktime_get(); + + delta = ktime_us_delta(now, cq->prev_ts); + if (delta < ENIC_AIC_TS_BREAK) + return; + cq->prev_ts = now; + + traffic = pkt_size_counter->large_pkt_bytes_cnt + + pkt_size_counter->small_pkt_bytes_cnt; + /* The table takes Mbps + * traffic *= 8 => bits + * traffic *= (10^6 / delta) => bps + * traffic /= 10^6 => Mbps + * + * Combining, traffic *= (8 / delta) + */ + + traffic <<= 3; + traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; + + for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) + if (traffic < mod_table[index].rx_rate) + break; + range_start = (pkt_size_counter->small_pkt_bytes_cnt > + pkt_size_counter->large_pkt_bytes_cnt << 1) ? + rx_coal->small_pkt_range_start : + rx_coal->large_pkt_range_start; + timer = range_start + ((rx_coal->range_end - range_start) * + mod_table[index].range_percent / 100); + /* Damping */ + cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; + + pkt_size_counter->large_pkt_bytes_cnt = 0; + pkt_size_counter->small_pkt_bytes_cnt = 0; +} + static int enic_poll(struct napi_struct *napi, int budget) { struct net_device *netdev = napi->dev; @@ -1199,6 +1257,11 @@ static int enic_poll(struct napi_struct *napi, int budget) if (err) rq_work_done = rq_work_to_do; + if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) + /* Call the function which refreshes the intr coalescing timer + * value based on the traffic. + */ + enic_calc_int_moderation(enic, &enic->rq[0]); if (rq_work_done < rq_work_to_do) { @@ -1207,70 +1270,14 @@ static int enic_poll(struct napi_struct *napi, int budget) */ napi_complete(napi); + if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) + enic_set_int_moderation(enic, &enic->rq[0]); vnic_intr_unmask(&enic->intr[intr]); } return rq_work_done; } -static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) -{ - unsigned int intr = enic_msix_rq_intr(enic, rq->index); - struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; - u32 timer = cq->tobe_rx_coal_timeval; - - if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { - vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); - cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; - } -} - -static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) -{ - struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; - struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; - struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; - int index; - u32 timer; - u32 range_start; - u32 traffic; - u64 delta; - ktime_t now = ktime_get(); - - delta = ktime_us_delta(now, cq->prev_ts); - if (delta < ENIC_AIC_TS_BREAK) - return; - cq->prev_ts = now; - - traffic = pkt_size_counter->large_pkt_bytes_cnt + - pkt_size_counter->small_pkt_bytes_cnt; - /* The table takes Mbps - * traffic *= 8 => bits - * traffic *= (10^6 / delta) => bps - * traffic /= 10^6 => Mbps - * - * Combining, traffic *= (8 / delta) - */ - - traffic <<= 3; - traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; - - for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) - if (traffic < mod_table[index].rx_rate) - break; - range_start = (pkt_size_counter->small_pkt_bytes_cnt > - pkt_size_counter->large_pkt_bytes_cnt << 1) ? - rx_coal->small_pkt_range_start : - rx_coal->large_pkt_range_start; - timer = range_start + ((rx_coal->range_end - range_start) * - mod_table[index].range_percent / 100); - /* Damping */ - cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; - - pkt_size_counter->large_pkt_bytes_cnt = 0; - pkt_size_counter->small_pkt_bytes_cnt = 0; -} - #ifdef CONFIG_RFS_ACCEL static void enic_free_rx_cpu_rmap(struct enic *enic) { @@ -1407,10 +1414,8 @@ static int enic_poll_msix_rq(struct napi_struct *napi, int budget) if (err) work_done = work_to_do; if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) - /* Call the function which refreshes - * the intr coalescing timer value based on - * the traffic. This is supported only in - * the case of MSI-x mode + /* Call the function which refreshes the intr coalescing timer + * value based on the traffic. */ enic_calc_int_moderation(enic, &enic->rq[rq]); @@ -1569,12 +1574,6 @@ static void enic_set_rx_coal_setting(struct enic *enic) int index = -1; struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; - /* If intr mode is not MSIX, do not do adaptive coalescing */ - if (VNIC_DEV_INTR_MODE_MSIX != vnic_dev_get_intr_mode(enic->vdev)) { - netdev_info(enic->netdev, "INTR mode is not MSIX, Not initializing adaptive coalescing"); - return; - } - /* 1. Read the link speed from fw * 2. Pick the default range for the speed * 3. Update it in enic->rx_coalesce_setting |