From 6d81f45145c1b24af32856d8a04922788537defd Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 2 Jan 2018 17:25:04 +0000 Subject: [PATCH] net: mvneta: add EEE support Add support for EEE to mvneta. Signed-off-by: Russell King Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/mvneta.c | 99 +++++++++++++++++++++++++-- 1 file changed, 94 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 0b8701d3ba38..44d665887b50 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -244,6 +244,12 @@ #define MVNETA_TXQ_TOKEN_SIZE_REG(q) (0x3e40 + ((q) << 2)) #define MVNETA_TXQ_TOKEN_SIZE_MAX 0x7fffffff +#define MVNETA_LPI_CTRL_0 0x2cc0 +#define MVNETA_LPI_CTRL_1 0x2cc4 +#define MVNETA_LPI_REQUEST_ENABLE BIT(0) +#define MVNETA_LPI_CTRL_2 0x2cc8 +#define MVNETA_LPI_STATUS 0x2ccc + #define MVNETA_CAUSE_TXQ_SENT_DESC_ALL_MASK 0xff /* Descriptor ring Macros */ @@ -320,6 +326,11 @@ #define MVNETA_RX_GET_BM_POOL_ID(rxd) \ (((rxd)->status & MVNETA_RXD_BM_POOL_MASK) >> MVNETA_RXD_BM_POOL_SHIFT) +enum { + ETHTOOL_STAT_EEE_WAKEUP, + ETHTOOL_MAX_STATS, +}; + struct mvneta_statistic { unsigned short offset; unsigned short type; @@ -328,6 +339,7 @@ struct mvneta_statistic { #define T_REG_32 32 #define T_REG_64 64 +#define T_SW 1 static const struct mvneta_statistic mvneta_statistics[] = { { 0x3000, T_REG_64, "good_octets_received", }, @@ -362,6 +374,7 @@ static const struct mvneta_statistic mvneta_statistics[] = { { 0x304c, T_REG_32, "broadcast_frames_sent", }, { 0x3054, T_REG_32, "fc_sent", }, { 0x300c, T_REG_32, "internal_mac_transmit_err", }, + { ETHTOOL_STAT_EEE_WAKEUP, T_SW, "eee_wakeup_errors", }, }; struct mvneta_pcpu_stats { @@ -424,6 +437,10 @@ struct mvneta_port { struct mvneta_bm_pool *pool_short; int bm_win_id; + bool eee_enabled; + bool eee_active; + bool tx_lpi_enabled; + u64 ethtool_stats[ARRAY_SIZE(mvneta_statistics)]; u32 indir[MVNETA_RSS_LU_TABLE_SIZE]; @@ -3369,6 +3386,18 @@ static void mvneta_mac_config(struct net_device *ndev, unsigned int mode, } } +static void mvneta_set_eee(struct mvneta_port *pp, bool enable) +{ + u32 lpi_ctl1; + + lpi_ctl1 = mvreg_read(pp, MVNETA_LPI_CTRL_1); + if (enable) + lpi_ctl1 |= MVNETA_LPI_REQUEST_ENABLE; + else + lpi_ctl1 &= ~MVNETA_LPI_REQUEST_ENABLE; + mvreg_write(pp, MVNETA_LPI_CTRL_1, lpi_ctl1); +} + static void mvneta_mac_link_down(struct net_device *ndev, unsigned int mode) { struct mvneta_port *pp = netdev_priv(ndev); @@ -3382,6 +3411,9 @@ static void mvneta_mac_link_down(struct net_device *ndev, unsigned int mode) val |= MVNETA_GMAC_FORCE_LINK_DOWN; mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val); } + + pp->eee_active = false; + mvneta_set_eee(pp, false); } static void mvneta_mac_link_up(struct net_device *ndev, unsigned int mode, @@ -3398,6 +3430,11 @@ static void mvneta_mac_link_up(struct net_device *ndev, unsigned int mode, } mvneta_port_up(pp); + + if (phy && pp->eee_enabled) { + pp->eee_active = phy_init_eee(phy, 0) >= 0; + mvneta_set_eee(pp, pp->eee_active && pp->tx_lpi_enabled); + } } static const struct phylink_mac_ops mvneta_phylink_ops = { @@ -3859,26 +3896,35 @@ static void mvneta_ethtool_update_stats(struct mvneta_port *pp) { const struct mvneta_statistic *s; void __iomem *base = pp->base; - u32 high, low, val; - u64 val64; + u32 high, low; + u64 val; int i; for (i = 0, s = mvneta_statistics; s < mvneta_statistics + ARRAY_SIZE(mvneta_statistics); s++, i++) { + val = 0; + switch (s->type) { case T_REG_32: val = readl_relaxed(base + s->offset); - pp->ethtool_stats[i] += val; break; case T_REG_64: /* Docs say to read low 32-bit then high */ low = readl_relaxed(base + s->offset); high = readl_relaxed(base + s->offset + 4); - val64 = (u64)high << 32 | low; - pp->ethtool_stats[i] += val64; + val = (u64)high << 32 | low; + break; + case T_SW: + switch (s->offset) { + case ETHTOOL_STAT_EEE_WAKEUP: + val = phylink_get_eee_err(pp->phylink); + break; + } break; } + + pp->ethtool_stats[i] += val; } } @@ -4031,6 +4077,47 @@ static int mvneta_ethtool_set_wol(struct net_device *dev, return ret; } +static int mvneta_ethtool_get_eee(struct net_device *dev, + struct ethtool_eee *eee) +{ + struct mvneta_port *pp = netdev_priv(dev); + u32 lpi_ctl0; + + lpi_ctl0 = mvreg_read(pp, MVNETA_LPI_CTRL_0); + + eee->eee_enabled = pp->eee_enabled; + eee->eee_active = pp->eee_active; + eee->tx_lpi_enabled = pp->tx_lpi_enabled; + eee->tx_lpi_timer = (lpi_ctl0) >> 8; // * scale; + + return phylink_ethtool_get_eee(pp->phylink, eee); +} + +static int mvneta_ethtool_set_eee(struct net_device *dev, + struct ethtool_eee *eee) +{ + struct mvneta_port *pp = netdev_priv(dev); + u32 lpi_ctl0; + + /* The Armada 37x documents do not give limits for this other than + * it being an 8-bit register. */ + if (eee->tx_lpi_enabled && + (eee->tx_lpi_timer < 0 || eee->tx_lpi_timer > 255)) + return -EINVAL; + + lpi_ctl0 = mvreg_read(pp, MVNETA_LPI_CTRL_0); + lpi_ctl0 &= ~(0xff << 8); + lpi_ctl0 |= eee->tx_lpi_timer << 8; + mvreg_write(pp, MVNETA_LPI_CTRL_0, lpi_ctl0); + + pp->eee_enabled = eee->eee_enabled; + pp->tx_lpi_enabled = eee->tx_lpi_enabled; + + mvneta_set_eee(pp, eee->tx_lpi_enabled && eee->eee_enabled); + + return phylink_ethtool_set_eee(pp->phylink, eee); +} + static const struct net_device_ops mvneta_netdev_ops = { .ndo_open = mvneta_open, .ndo_stop = mvneta_stop, @@ -4064,6 +4151,8 @@ static const struct ethtool_ops mvneta_eth_tool_ops = { .set_link_ksettings = mvneta_ethtool_set_link_ksettings, .get_wol = mvneta_ethtool_get_wol, .set_wol = mvneta_ethtool_set_wol, + .get_eee = mvneta_ethtool_get_eee, + .set_eee = mvneta_ethtool_set_eee, }; /* Initialize hw */ -- 2.39.5