diff options
| -rw-r--r-- | drivers/net/ethernet/emulex/benet/be.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/emulex/benet/be_ethtool.c | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/emulex/benet/be_hw.h | 12 | ||||
| -rw-r--r-- | drivers/net/ethernet/emulex/benet/be_main.c | 152 |
4 files changed, 128 insertions, 45 deletions
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h index bbfbbb313178..ddc7a72cc926 100644 --- a/drivers/net/ethernet/emulex/benet/be.h +++ b/drivers/net/ethernet/emulex/benet/be.h @@ -805,6 +805,7 @@ bool be_pause_supported(struct be_adapter *adapter); u32 be_get_fw_log_level(struct be_adapter *adapter); int be_update_queues(struct be_adapter *adapter); int be_poll(struct napi_struct *napi, int budget); +void be_eqd_update(struct be_adapter *adapter, bool force_update); /* * internal function to initialize-cleanup roce device. diff --git a/drivers/net/ethernet/emulex/benet/be_ethtool.c b/drivers/net/ethernet/emulex/benet/be_ethtool.c index b765c24625bf..61321de68a93 100644 --- a/drivers/net/ethernet/emulex/benet/be_ethtool.c +++ b/drivers/net/ethernet/emulex/benet/be_ethtool.c @@ -368,6 +368,14 @@ static int be_set_coalesce(struct net_device *netdev, aic++; } + /* For Skyhawk, the EQD setting happens via EQ_DB when AIC is enabled. + * When AIC is disabled, persistently force set EQD value via the + * FW cmd, so that we don't have to calculate the delay multiplier + * encode value each time EQ_DB is rung + */ + if (!et->use_adaptive_rx_coalesce && skyhawk_chip(adapter)) + be_eqd_update(adapter, true); + return 0; } diff --git a/drivers/net/ethernet/emulex/benet/be_hw.h b/drivers/net/ethernet/emulex/benet/be_hw.h index 48840889db62..ca074ba6dd54 100644 --- a/drivers/net/ethernet/emulex/benet/be_hw.h +++ b/drivers/net/ethernet/emulex/benet/be_hw.h @@ -132,6 +132,18 @@ #define DB_EQ_NUM_POPPED_SHIFT (16) /* bits 16 - 28 */ /* Rearm bit */ #define DB_EQ_REARM_SHIFT (29) /* bit 29 */ +/* Rearm to interrupt delay encoding */ +#define DB_EQ_R2I_DLY_SHIFT (30) /* bits 30 - 31 */ + +/* Rearm to interrupt (R2I) delay multiplier encoding represents 3 different + * values configured in CEV_REARM2IRPT_DLY_MULT_CSR register. This value is + * programmed by host driver while ringing an EQ doorbell(EQ_DB) if a delay + * between rearming the EQ and next interrupt on this EQ is desired. + */ +#define R2I_DLY_ENC_0 0 /* No delay */ +#define R2I_DLY_ENC_1 1 /* maps to 160us EQ delay */ +#define R2I_DLY_ENC_2 2 /* maps to 96us EQ delay */ +#define R2I_DLY_ENC_3 3 /* maps to 48us EQ delay */ /********* Compl Q door bell *************/ #define DB_CQ_OFFSET 0x120 diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index d4f25a4b8af7..a120be0334b0 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -211,7 +211,8 @@ static void be_txq_notify(struct be_adapter *adapter, struct be_tx_obj *txo, } static void be_eq_notify(struct be_adapter *adapter, u16 qid, - bool arm, bool clear_int, u16 num_popped) + bool arm, bool clear_int, u16 num_popped, + u32 eq_delay_mult_enc) { u32 val = 0; @@ -227,6 +228,7 @@ static void be_eq_notify(struct be_adapter *adapter, u16 qid, val |= 1 << DB_EQ_CLR_SHIFT; val |= 1 << DB_EQ_EVNT_SHIFT; val |= num_popped << DB_EQ_NUM_POPPED_SHIFT; + val |= eq_delay_mult_enc << DB_EQ_R2I_DLY_SHIFT; iowrite32(val, adapter->db + DB_EQ_OFFSET); } @@ -1686,61 +1688,110 @@ static void be_aic_update(struct be_aic_obj *aic, u64 rx_pkts, u64 tx_pkts, aic->jiffies = now; } -static void be_eqd_update(struct be_adapter *adapter) +static int be_get_new_eqd(struct be_eq_obj *eqo) { - struct be_set_eqd set_eqd[MAX_EVT_QS]; - int eqd, i, num = 0, start; + struct be_adapter *adapter = eqo->adapter; + int eqd, start; struct be_aic_obj *aic; - struct be_eq_obj *eqo; struct be_rx_obj *rxo; struct be_tx_obj *txo; - u64 rx_pkts, tx_pkts; + u64 rx_pkts = 0, tx_pkts = 0; ulong now; u32 pps, delta; + int i; - for_all_evt_queues(adapter, eqo, i) { - aic = &adapter->aic_obj[eqo->idx]; - if (!aic->enable) { - if (aic->jiffies) - aic->jiffies = 0; - eqd = aic->et_eqd; - goto modify_eqd; - } + aic = &adapter->aic_obj[eqo->idx]; + if (!aic->enable) { + if (aic->jiffies) + aic->jiffies = 0; + eqd = aic->et_eqd; + return eqd; + } - rxo = &adapter->rx_obj[eqo->idx]; + for_all_rx_queues_on_eq(adapter, eqo, rxo, i) { do { start = u64_stats_fetch_begin_irq(&rxo->stats.sync); - rx_pkts = rxo->stats.rx_pkts; + rx_pkts += rxo->stats.rx_pkts; } while (u64_stats_fetch_retry_irq(&rxo->stats.sync, start)); + } - txo = &adapter->tx_obj[eqo->idx]; + for_all_tx_queues_on_eq(adapter, eqo, txo, i) { do { start = u64_stats_fetch_begin_irq(&txo->stats.sync); - tx_pkts = txo->stats.tx_reqs; + tx_pkts += txo->stats.tx_reqs; } while (u64_stats_fetch_retry_irq(&txo->stats.sync, start)); + } - /* Skip, if wrapped around or first calculation */ - now = jiffies; - if (!aic->jiffies || time_before(now, aic->jiffies) || - rx_pkts < aic->rx_pkts_prev || - tx_pkts < aic->tx_reqs_prev) { - be_aic_update(aic, rx_pkts, tx_pkts, now); - continue; - } + /* Skip, if wrapped around or first calculation */ + now = jiffies; + if (!aic->jiffies || time_before(now, aic->jiffies) || + rx_pkts < aic->rx_pkts_prev || + tx_pkts < aic->tx_reqs_prev) { + be_aic_update(aic, rx_pkts, tx_pkts, now); + return aic->prev_eqd; + } - delta = jiffies_to_msecs(now - aic->jiffies); - pps = (((u32)(rx_pkts - aic->rx_pkts_prev) * 1000) / delta) + - (((u32)(tx_pkts - aic->tx_reqs_prev) * 1000) / delta); - eqd = (pps / 15000) << 2; + delta = jiffies_to_msecs(now - aic->jiffies); + if (delta == 0) + return aic->prev_eqd; - if (eqd < 8) - eqd = 0; - eqd = min_t(u32, eqd, aic->max_eqd); - eqd = max_t(u32, eqd, aic->min_eqd); + pps = (((u32)(rx_pkts - aic->rx_pkts_prev) * 1000) / delta) + + (((u32)(tx_pkts - aic->tx_reqs_prev) * 1000) / delta); + eqd = (pps / 15000) << 2; - be_aic_update(aic, rx_pkts, tx_pkts, now); -modify_eqd: - if (eqd != aic->prev_eqd) { + if (eqd < 8) + eqd = 0; + eqd = min_t(u32, eqd, aic->max_eqd); + eqd = max_t(u32, eqd, aic->min_eqd); + + be_aic_update(aic, rx_pkts, tx_pkts, now); + + return eqd; +} + +/* For Skyhawk-R only */ +static u32 be_get_eq_delay_mult_enc(struct be_eq_obj *eqo) +{ + struct be_adapter *adapter = eqo->adapter; + struct be_aic_obj *aic = &adapter->aic_obj[eqo->idx]; + ulong now = jiffies; + int eqd; + u32 mult_enc; + + if (!aic->enable) + return 0; + + if (time_before_eq(now, aic->jiffies) || + jiffies_to_msecs(now - aic->jiffies) < 1) + eqd = aic->prev_eqd; + else + eqd = be_get_new_eqd(eqo); + + if (eqd > 100) + mult_enc = R2I_DLY_ENC_1; + else if (eqd > 60) + mult_enc = R2I_DLY_ENC_2; + else if (eqd > 20) + mult_enc = R2I_DLY_ENC_3; + else + mult_enc = R2I_DLY_ENC_0; + + aic->prev_eqd = eqd; + + return mult_enc; +} + +void be_eqd_update(struct be_adapter *adapter, bool force_update) +{ + struct be_set_eqd set_eqd[MAX_EVT_QS]; + struct be_aic_obj *aic; + struct be_eq_obj *eqo; + int i, num = 0, eqd; + + for_all_evt_queues(adapter, eqo, i) { + aic = &adapter->aic_obj[eqo->idx]; + eqd = be_get_new_eqd(eqo); + if (force_update || eqd != aic->prev_eqd) { set_eqd[num].delay_multiplier = (eqd * 65)/100; set_eqd[num].eq_id = eqo->q.id; aic->prev_eqd = eqd; @@ -2248,7 +2299,7 @@ static void be_eq_clean(struct be_eq_obj *eqo) { int num = events_get(eqo); - be_eq_notify(eqo->adapter, eqo->q.id, false, true, num); + be_eq_notify(eqo->adapter, eqo->q.id, false, true, num, 0); } static void be_rx_cq_clean(struct be_rx_obj *rxo) @@ -2609,7 +2660,7 @@ static irqreturn_t be_intx(int irq, void *dev) if (num_evts) eqo->spurious_intr = 0; } - be_eq_notify(adapter, eqo->q.id, false, true, num_evts); + be_eq_notify(adapter, eqo->q.id, false, true, num_evts, 0); /* Return IRQ_HANDLED only for the the first spurious intr * after a valid intr to stop the kernel from branding @@ -2625,7 +2676,7 @@ static irqreturn_t be_msix(int irq, void *dev) { struct be_eq_obj *eqo = dev; - be_eq_notify(eqo->adapter, eqo->q.id, false, true, 0); + be_eq_notify(eqo->adapter, eqo->q.id, false, true, 0, 0); napi_schedule(&eqo->napi); return IRQ_HANDLED; } @@ -2874,6 +2925,7 @@ int be_poll(struct napi_struct *napi, int budget) int max_work = 0, work, i, num_evts; struct be_rx_obj *rxo; struct be_tx_obj *txo; + u32 mult_enc = 0; num_evts = events_get(eqo); @@ -2899,10 +2951,18 @@ int be_poll(struct napi_struct *napi, int budget) if (max_work < budget) { napi_complete(napi); - be_eq_notify(adapter, eqo->q.id, true, false, num_evts); + + /* Skyhawk EQ_DB has a provision to set the rearm to interrupt + * delay via a delay multiplier encoding value + */ + if (skyhawk_chip(adapter)) + mult_enc = be_get_eq_delay_mult_enc(eqo); + + be_eq_notify(adapter, eqo->q.id, true, false, num_evts, + mult_enc); } else { /* As we'll continue in polling mode, count and clear events */ - be_eq_notify(adapter, eqo->q.id, false, false, num_evts); + be_eq_notify(adapter, eqo->q.id, false, false, num_evts, 0); } return max_work; } @@ -3299,7 +3359,7 @@ static int be_open(struct net_device *netdev) for_all_evt_queues(adapter, eqo, i) { napi_enable(&eqo->napi); be_enable_busy_poll(eqo); - be_eq_notify(adapter, eqo->q.id, true, true, 0); + be_eq_notify(adapter, eqo->q.id, true, true, 0, 0); } adapter->flags |= BE_FLAGS_NAPI_ENABLED; @@ -4225,7 +4285,7 @@ static void be_netpoll(struct net_device *netdev) int i; for_all_evt_queues(adapter, eqo, i) { - be_eq_notify(eqo->adapter, eqo->q.id, false, true, 0); + be_eq_notify(eqo->adapter, eqo->q.id, false, true, 0, 0); napi_schedule(&eqo->napi); } } @@ -5227,7 +5287,9 @@ static void be_worker(struct work_struct *work) be_post_rx_frags(rxo, GFP_KERNEL, MAX_RX_POST); } - be_eqd_update(adapter); + /* EQ-delay update for Skyhawk is done while notifying EQ */ + if (!skyhawk_chip(adapter)) + be_eqd_update(adapter, false); if (adapter->flags & BE_FLAGS_EVT_INCOMPATIBLE_SFP) be_log_sfp_info(adapter); |