From 78e6a9b4a43b2e45c5d0f26d487b2890ffb0f0b5 Mon Sep 17 00:00:00 2001 From: Raghu Vatsavayi Date: Tue, 21 Jun 2016 22:53:10 -0700 Subject: [PATCH] liquidio: tx rx interrupt moderation This patch has new tx/rx interrupt moderation defaults of count/timer for better throughput and utilisation. Signed-off-by: Derek Chickles Signed-off-by: Satanand Burla Signed-off-by: Felix Manlunas Signed-off-by: Raghu Vatsavayi Signed-off-by: Raghu Vatsavayi Signed-off-by: David S. Miller --- drivers/net/ethernet/cavium/liquidio/lio_ethtool.c | 270 ++++++++++++--------- drivers/net/ethernet/cavium/liquidio/lio_main.c | 22 +- .../net/ethernet/cavium/liquidio/liquidio_common.h | 49 ++-- 3 files changed, 200 insertions(+), 141 deletions(-) diff --git a/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c b/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c index 56f465b..9c6b58a 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c @@ -616,50 +616,50 @@ static int lio_get_intr_coalesce(struct net_device *netdev, { struct lio *lio = GET_LIO(netdev); struct octeon_device *oct = lio->oct_dev; - struct octeon_cn6xxx *cn6xxx = (struct octeon_cn6xxx *)oct->chip; struct octeon_instr_queue *iq; struct oct_intrmod_cfg *intrmod_cfg; intrmod_cfg = &oct->intrmod; switch (oct->chip_id) { - /* case OCTEON_CN73XX: Todo */ - /* break; */ case OCTEON_CN68XX: - case OCTEON_CN66XX: - if (!intrmod_cfg->intrmod_enable) { + case OCTEON_CN66XX: { + struct octeon_cn6xxx *cn6xxx = + (struct octeon_cn6xxx *)oct->chip; + + if (!intrmod_cfg->rx_enable) { intr_coal->rx_coalesce_usecs = CFG_GET_OQ_INTR_TIME(cn6xxx->conf); intr_coal->rx_max_coalesced_frames = CFG_GET_OQ_INTR_PKT(cn6xxx->conf); - } else { - intr_coal->use_adaptive_rx_coalesce = - intrmod_cfg->intrmod_enable; - intr_coal->rate_sample_interval = - intrmod_cfg->intrmod_check_intrvl; - intr_coal->pkt_rate_high = - intrmod_cfg->intrmod_maxpkt_ratethr; - intr_coal->pkt_rate_low = - intrmod_cfg->intrmod_minpkt_ratethr; - intr_coal->rx_max_coalesced_frames_high = - intrmod_cfg->intrmod_maxcnt_trigger; - intr_coal->rx_coalesce_usecs_high = - intrmod_cfg->intrmod_maxtmr_trigger; - intr_coal->rx_coalesce_usecs_low = - intrmod_cfg->intrmod_mintmr_trigger; - intr_coal->rx_max_coalesced_frames_low = - intrmod_cfg->intrmod_mincnt_trigger; } iq = oct->instr_queue[lio->linfo.txpciq[0].s.q_no]; intr_coal->tx_max_coalesced_frames = iq->fill_threshold; break; - + } default: netif_info(lio, drv, lio->netdev, "Unknown Chip !!\n"); return -EINVAL; } - + if (intrmod_cfg->rx_enable) { + intr_coal->use_adaptive_rx_coalesce = + intrmod_cfg->rx_enable; + intr_coal->rate_sample_interval = + intrmod_cfg->check_intrvl; + intr_coal->pkt_rate_high = + intrmod_cfg->maxpkt_ratethr; + intr_coal->pkt_rate_low = + intrmod_cfg->minpkt_ratethr; + intr_coal->rx_max_coalesced_frames_high = + intrmod_cfg->rx_maxcnt_trigger; + intr_coal->rx_coalesce_usecs_high = + intrmod_cfg->rx_maxtmr_trigger; + intr_coal->rx_coalesce_usecs_low = + intrmod_cfg->rx_mintmr_trigger; + intr_coal->rx_max_coalesced_frames_low = + intrmod_cfg->rx_mincnt_trigger; + } return 0; } @@ -679,19 +679,20 @@ static void octnet_intrmod_callback(struct octeon_device *oct_dev, else dev_info(&oct_dev->pci_dev->dev, "Rx-Adaptive Interrupt moderation enabled:%llx\n", - oct_dev->intrmod.intrmod_enable); + oct_dev->intrmod.rx_enable); octeon_free_soft_command(oct_dev, sc); } /* Configure interrupt moderation parameters */ -static int octnet_set_intrmod_cfg(void *oct, struct oct_intrmod_cfg *intr_cfg) +static int octnet_set_intrmod_cfg(struct lio *lio, + struct oct_intrmod_cfg *intr_cfg) { struct octeon_soft_command *sc; struct oct_intrmod_cmd *cmd; struct oct_intrmod_cfg *cfg; int retval; - struct octeon_device *oct_dev = (struct octeon_device *)oct; + struct octeon_device *oct_dev = lio->oct_dev; /* Alloc soft command */ sc = (struct octeon_soft_command *) @@ -712,6 +713,8 @@ static int octnet_set_intrmod_cfg(void *oct, struct oct_intrmod_cfg *intr_cfg) cmd->cfg = cfg; cmd->oct_dev = oct_dev; + sc->iq_no = lio->linfo.txpciq[0].s.q_no; + octeon_prepare_soft_command(oct_dev, sc, OPCODE_NIC, OPCODE_NIC_INTRMOD_CFG, 0, 0, 0); @@ -730,7 +733,7 @@ static int octnet_set_intrmod_cfg(void *oct, struct oct_intrmod_cfg *intr_cfg) /* Enable/Disable auto interrupt Moderation */ static int oct_cfg_adaptive_intr(struct lio *lio, struct ethtool_coalesce - *intr_coal, int adaptive) + *intr_coal) { int ret = 0; struct octeon_device *oct = lio->oct_dev; @@ -738,59 +741,73 @@ static int oct_cfg_adaptive_intr(struct lio *lio, struct ethtool_coalesce intrmod_cfg = &oct->intrmod; - if (adaptive) { + if (oct->intrmod.rx_enable || oct->intrmod.tx_enable) { if (intr_coal->rate_sample_interval) - intrmod_cfg->intrmod_check_intrvl = + intrmod_cfg->check_intrvl = intr_coal->rate_sample_interval; else - intrmod_cfg->intrmod_check_intrvl = + intrmod_cfg->check_intrvl = LIO_INTRMOD_CHECK_INTERVAL; if (intr_coal->pkt_rate_high) - intrmod_cfg->intrmod_maxpkt_ratethr = + intrmod_cfg->maxpkt_ratethr = intr_coal->pkt_rate_high; else - intrmod_cfg->intrmod_maxpkt_ratethr = + intrmod_cfg->maxpkt_ratethr = LIO_INTRMOD_MAXPKT_RATETHR; if (intr_coal->pkt_rate_low) - intrmod_cfg->intrmod_minpkt_ratethr = + intrmod_cfg->minpkt_ratethr = intr_coal->pkt_rate_low; else - intrmod_cfg->intrmod_minpkt_ratethr = + intrmod_cfg->minpkt_ratethr = LIO_INTRMOD_MINPKT_RATETHR; - + } + if (oct->intrmod.rx_enable) { if (intr_coal->rx_max_coalesced_frames_high) - intrmod_cfg->intrmod_maxcnt_trigger = + intrmod_cfg->rx_maxcnt_trigger = intr_coal->rx_max_coalesced_frames_high; else - intrmod_cfg->intrmod_maxcnt_trigger = - LIO_INTRMOD_MAXCNT_TRIGGER; + intrmod_cfg->rx_maxcnt_trigger = + LIO_INTRMOD_RXMAXCNT_TRIGGER; if (intr_coal->rx_coalesce_usecs_high) - intrmod_cfg->intrmod_maxtmr_trigger = + intrmod_cfg->rx_maxtmr_trigger = intr_coal->rx_coalesce_usecs_high; else - intrmod_cfg->intrmod_maxtmr_trigger = - LIO_INTRMOD_MAXTMR_TRIGGER; + intrmod_cfg->rx_maxtmr_trigger = + LIO_INTRMOD_RXMAXTMR_TRIGGER; if (intr_coal->rx_coalesce_usecs_low) - intrmod_cfg->intrmod_mintmr_trigger = + intrmod_cfg->rx_mintmr_trigger = intr_coal->rx_coalesce_usecs_low; else - intrmod_cfg->intrmod_mintmr_trigger = - LIO_INTRMOD_MINTMR_TRIGGER; + intrmod_cfg->rx_mintmr_trigger = + LIO_INTRMOD_RXMINTMR_TRIGGER; if (intr_coal->rx_max_coalesced_frames_low) - intrmod_cfg->intrmod_mincnt_trigger = + intrmod_cfg->rx_mincnt_trigger = intr_coal->rx_max_coalesced_frames_low; else - intrmod_cfg->intrmod_mincnt_trigger = - LIO_INTRMOD_MINCNT_TRIGGER; + intrmod_cfg->rx_mincnt_trigger = + LIO_INTRMOD_RXMINCNT_TRIGGER; + } + if (oct->intrmod.tx_enable) { + if (intr_coal->tx_max_coalesced_frames_high) + intrmod_cfg->tx_maxcnt_trigger = + intr_coal->tx_max_coalesced_frames_high; + else + intrmod_cfg->tx_maxcnt_trigger = + LIO_INTRMOD_TXMAXCNT_TRIGGER; + if (intr_coal->tx_max_coalesced_frames_low) + intrmod_cfg->tx_mincnt_trigger = + intr_coal->tx_max_coalesced_frames_low; + else + intrmod_cfg->tx_mincnt_trigger = + LIO_INTRMOD_TXMINCNT_TRIGGER; } - intrmod_cfg->intrmod_enable = adaptive; - ret = octnet_set_intrmod_cfg(oct, intrmod_cfg); + ret = octnet_set_intrmod_cfg(lio, intrmod_cfg); return ret; } @@ -798,54 +815,82 @@ static int oct_cfg_adaptive_intr(struct lio *lio, struct ethtool_coalesce static int oct_cfg_rx_intrcnt(struct lio *lio, struct ethtool_coalesce *intr_coal) { - int ret; struct octeon_device *oct = lio->oct_dev; - struct octeon_cn6xxx *cn6xxx = (struct octeon_cn6xxx *)oct->chip; u32 rx_max_coalesced_frames; - if (!intr_coal->rx_max_coalesced_frames) - rx_max_coalesced_frames = CN6XXX_OQ_INTR_PKT; - else - rx_max_coalesced_frames = intr_coal->rx_max_coalesced_frames; - - /* Disable adaptive interrupt modulation */ - ret = oct_cfg_adaptive_intr(lio, intr_coal, 0); - if (ret) - return ret; - /* Config Cnt based interrupt values */ - octeon_write_csr(oct, CN6XXX_SLI_OQ_INT_LEVEL_PKTS, - rx_max_coalesced_frames); - CFG_SET_OQ_INTR_PKT(cn6xxx->conf, rx_max_coalesced_frames); + switch (oct->chip_id) { + case OCTEON_CN68XX: + case OCTEON_CN66XX: { + struct octeon_cn6xxx *cn6xxx = + (struct octeon_cn6xxx *)oct->chip; + + if (!intr_coal->rx_max_coalesced_frames) + rx_max_coalesced_frames = CN6XXX_OQ_INTR_PKT; + else + rx_max_coalesced_frames = + intr_coal->rx_max_coalesced_frames; + octeon_write_csr(oct, CN6XXX_SLI_OQ_INT_LEVEL_PKTS, + rx_max_coalesced_frames); + CFG_SET_OQ_INTR_PKT(cn6xxx->conf, rx_max_coalesced_frames); + break; + } + default: + return -EINVAL; + } return 0; } static int oct_cfg_rx_intrtime(struct lio *lio, struct ethtool_coalesce *intr_coal) { - int ret; struct octeon_device *oct = lio->oct_dev; - struct octeon_cn6xxx *cn6xxx = (struct octeon_cn6xxx *)oct->chip; u32 time_threshold, rx_coalesce_usecs; - if (!intr_coal->rx_coalesce_usecs) - rx_coalesce_usecs = CN6XXX_OQ_INTR_TIME; - else - rx_coalesce_usecs = intr_coal->rx_coalesce_usecs; + /* Config Time based interrupt values */ + switch (oct->chip_id) { + case OCTEON_CN68XX: + case OCTEON_CN66XX: { + struct octeon_cn6xxx *cn6xxx = + (struct octeon_cn6xxx *)oct->chip; + if (!intr_coal->rx_coalesce_usecs) + rx_coalesce_usecs = CN6XXX_OQ_INTR_TIME; + else + rx_coalesce_usecs = intr_coal->rx_coalesce_usecs; - /* Disable adaptive interrupt modulation */ - ret = oct_cfg_adaptive_intr(lio, intr_coal, 0); - if (ret) - return ret; + time_threshold = lio_cn6xxx_get_oq_ticks(oct, + rx_coalesce_usecs); + octeon_write_csr(oct, + CN6XXX_SLI_OQ_INT_LEVEL_TIME, + time_threshold); - /* Config Time based interrupt values */ - time_threshold = lio_cn6xxx_get_oq_ticks(oct, rx_coalesce_usecs); - octeon_write_csr(oct, CN6XXX_SLI_OQ_INT_LEVEL_TIME, time_threshold); - CFG_SET_OQ_INTR_TIME(cn6xxx->conf, rx_coalesce_usecs); + CFG_SET_OQ_INTR_TIME(cn6xxx->conf, rx_coalesce_usecs); + break; + } + default: + return -EINVAL; + } return 0; } +static int +oct_cfg_tx_intrcnt(struct lio *lio, struct ethtool_coalesce *intr_coal + __attribute__((unused))) +{ + struct octeon_device *oct = lio->oct_dev; + + /* Config Cnt based interrupt values */ + switch (oct->chip_id) { + case OCTEON_CN68XX: + case OCTEON_CN66XX: + break; + default: + return -EINVAL; + } + return 0; +} + static int lio_set_intr_coalesce(struct net_device *netdev, struct ethtool_coalesce *intr_coal) { @@ -853,59 +898,48 @@ static int lio_set_intr_coalesce(struct net_device *netdev, int ret; struct octeon_device *oct = lio->oct_dev; u32 j, q_no; + int db_max, db_min; - if ((intr_coal->tx_max_coalesced_frames >= CN6XXX_DB_MIN) && - (intr_coal->tx_max_coalesced_frames <= CN6XXX_DB_MAX)) { - for (j = 0; j < lio->linfo.num_txpciq; j++) { - q_no = lio->linfo.txpciq[j].s.q_no; - oct->instr_queue[q_no]->fill_threshold = - intr_coal->tx_max_coalesced_frames; + switch (oct->chip_id) { + case OCTEON_CN68XX: + case OCTEON_CN66XX: + db_min = CN6XXX_DB_MIN; + db_max = CN6XXX_DB_MAX; + if ((intr_coal->tx_max_coalesced_frames >= db_min) && + (intr_coal->tx_max_coalesced_frames <= db_max)) { + for (j = 0; j < lio->linfo.num_txpciq; j++) { + q_no = lio->linfo.txpciq[j].s.q_no; + oct->instr_queue[q_no]->fill_threshold = + intr_coal->tx_max_coalesced_frames; + } + } else { + dev_err(&oct->pci_dev->dev, + "LIQUIDIO: Invalid tx-frames:%d. Range is min:%d max:%d\n", + intr_coal->tx_max_coalesced_frames, db_min, + db_max); + return -EINVAL; } - } else { - dev_err(&oct->pci_dev->dev, - "LIQUIDIO: Invalid tx-frames:%d. Range is min:%d max:%d\n", - intr_coal->tx_max_coalesced_frames, CN6XXX_DB_MIN, - CN6XXX_DB_MAX); + break; + default: return -EINVAL; } - /* User requested adaptive-rx on */ - if (intr_coal->use_adaptive_rx_coalesce) { - ret = oct_cfg_adaptive_intr(lio, intr_coal, 1); - if (ret) - goto ret_intrmod; - } + oct->intrmod.rx_enable = intr_coal->use_adaptive_rx_coalesce ? 1 : 0; + oct->intrmod.tx_enable = intr_coal->use_adaptive_tx_coalesce ? 1 : 0; + + ret = oct_cfg_adaptive_intr(lio, intr_coal); - /* User requested adaptive-rx off and rx coalesce */ - if ((intr_coal->rx_coalesce_usecs) && - (!intr_coal->use_adaptive_rx_coalesce)) { + if (!intr_coal->use_adaptive_rx_coalesce) { ret = oct_cfg_rx_intrtime(lio, intr_coal); if (ret) goto ret_intrmod; - } - /* User requested adaptive-rx off and rx coalesce */ - if ((intr_coal->rx_max_coalesced_frames) && - (!intr_coal->use_adaptive_rx_coalesce)) { ret = oct_cfg_rx_intrcnt(lio, intr_coal); if (ret) goto ret_intrmod; } - - /* User requested adaptive-rx off, so use default coalesce params */ - if ((!intr_coal->rx_max_coalesced_frames) && - (!intr_coal->use_adaptive_rx_coalesce) && - (!intr_coal->rx_coalesce_usecs)) { - dev_info(&oct->pci_dev->dev, - "Turning off adaptive-rx interrupt moderation\n"); - dev_info(&oct->pci_dev->dev, - "Using RX Coalesce Default values rx_coalesce_usecs:%d rx_max_coalesced_frames:%d\n", - CN6XXX_OQ_INTR_TIME, CN6XXX_OQ_INTR_PKT); - ret = oct_cfg_rx_intrtime(lio, intr_coal); - if (ret) - goto ret_intrmod; - - ret = oct_cfg_rx_intrcnt(lio, intr_coal); + if (!intr_coal->use_adaptive_tx_coalesce) { + ret = oct_cfg_tx_intrcnt(lio, intr_coal); if (ret) goto ret_intrmod; } diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c index 56b1d67..a1e31ac 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_main.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c @@ -3579,15 +3579,19 @@ static int liquidio_init_nic_module(struct octeon_device *oct) /* Initialize interrupt moderation params */ intrmod_cfg = &((struct octeon_device *)oct)->intrmod; - intrmod_cfg->intrmod_enable = 1; - intrmod_cfg->intrmod_check_intrvl = LIO_INTRMOD_CHECK_INTERVAL; - intrmod_cfg->intrmod_maxpkt_ratethr = LIO_INTRMOD_MAXPKT_RATETHR; - intrmod_cfg->intrmod_minpkt_ratethr = LIO_INTRMOD_MINPKT_RATETHR; - intrmod_cfg->intrmod_maxcnt_trigger = LIO_INTRMOD_MAXCNT_TRIGGER; - intrmod_cfg->intrmod_maxtmr_trigger = LIO_INTRMOD_MAXTMR_TRIGGER; - intrmod_cfg->intrmod_mintmr_trigger = LIO_INTRMOD_MINTMR_TRIGGER; - intrmod_cfg->intrmod_mincnt_trigger = LIO_INTRMOD_MINCNT_TRIGGER; - + intrmod_cfg->rx_enable = 1; + intrmod_cfg->check_intrvl = LIO_INTRMOD_CHECK_INTERVAL; + intrmod_cfg->maxpkt_ratethr = LIO_INTRMOD_MAXPKT_RATETHR; + intrmod_cfg->minpkt_ratethr = LIO_INTRMOD_MINPKT_RATETHR; + intrmod_cfg->rx_maxcnt_trigger = LIO_INTRMOD_RXMAXCNT_TRIGGER; + intrmod_cfg->rx_maxtmr_trigger = LIO_INTRMOD_RXMAXTMR_TRIGGER; + intrmod_cfg->rx_mintmr_trigger = LIO_INTRMOD_RXMINTMR_TRIGGER; + intrmod_cfg->rx_mincnt_trigger = LIO_INTRMOD_RXMINCNT_TRIGGER; + intrmod_cfg->tx_enable = 1; + intrmod_cfg->tx_maxcnt_trigger = LIO_INTRMOD_TXMAXCNT_TRIGGER; + intrmod_cfg->tx_mincnt_trigger = LIO_INTRMOD_TXMINCNT_TRIGGER; + intrmod_cfg->rx_frames = CFG_GET_OQ_INTR_PKT(octeon_get_conf(oct)); + intrmod_cfg->rx_usecs = CFG_GET_OQ_INTR_TIME(octeon_get_conf(oct)); dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n"); return retval; diff --git a/drivers/net/ethernet/cavium/liquidio/liquidio_common.h b/drivers/net/ethernet/cavium/liquidio/liquidio_common.h index 1ef9001..b5ab704 100644 --- a/drivers/net/ethernet/cavium/liquidio/liquidio_common.h +++ b/drivers/net/ethernet/cavium/liquidio/liquidio_common.h @@ -796,23 +796,44 @@ struct oct_mdio_cmd { #define OCT_LINK_STATS_SIZE (sizeof(struct oct_link_stats)) +/* intrmod: max. packet rate threshold */ +#define LIO_INTRMOD_MAXPKT_RATETHR 196608 +/* intrmod: min. packet rate threshold */ +#define LIO_INTRMOD_MINPKT_RATETHR 9216 +/* intrmod: max. packets to trigger interrupt */ +#define LIO_INTRMOD_RXMAXCNT_TRIGGER 384 +/* intrmod: min. packets to trigger interrupt */ +#define LIO_INTRMOD_RXMINCNT_TRIGGER 1 +/* intrmod: max. time to trigger interrupt */ +#define LIO_INTRMOD_RXMAXTMR_TRIGGER 128 +/* 66xx:intrmod: min. time to trigger interrupt + * (value of 1 is optimum for TCP_RR) + */ +#define LIO_INTRMOD_RXMINTMR_TRIGGER 1 + +/* intrmod: max. packets to trigger interrupt */ +#define LIO_INTRMOD_TXMAXCNT_TRIGGER 64 +/* intrmod: min. packets to trigger interrupt */ +#define LIO_INTRMOD_TXMINCNT_TRIGGER 0 + +/* intrmod: poll interval in seconds */ #define LIO_INTRMOD_CHECK_INTERVAL 1 -#define LIO_INTRMOD_MAXPKT_RATETHR 196608 /* max pkt rate threshold */ -#define LIO_INTRMOD_MINPKT_RATETHR 9216 /* min pkt rate threshold */ -#define LIO_INTRMOD_MAXCNT_TRIGGER 384 /* max pkts to trigger interrupt */ -#define LIO_INTRMOD_MINCNT_TRIGGER 1 /* min pkts to trigger interrupt */ -#define LIO_INTRMOD_MAXTMR_TRIGGER 128 /* max time to trigger interrupt */ -#define LIO_INTRMOD_MINTMR_TRIGGER 32 /* min time to trigger interrupt */ struct oct_intrmod_cfg { - u64 intrmod_enable; - u64 intrmod_check_intrvl; - u64 intrmod_maxpkt_ratethr; - u64 intrmod_minpkt_ratethr; - u64 intrmod_maxcnt_trigger; - u64 intrmod_maxtmr_trigger; - u64 intrmod_mincnt_trigger; - u64 intrmod_mintmr_trigger; + u64 rx_enable; + u64 tx_enable; + u64 check_intrvl; + u64 maxpkt_ratethr; + u64 minpkt_ratethr; + u64 rx_maxcnt_trigger; + u64 rx_mincnt_trigger; + u64 rx_maxtmr_trigger; + u64 rx_mintmr_trigger; + u64 tx_mincnt_trigger; + u64 tx_maxcnt_trigger; + u64 rx_frames; + u64 tx_frames; + u64 rx_usecs; }; #define BASE_QUEUE_NOT_REQUESTED 65535 -- 2.7.4