Commit b82f8c3f authored by Fugang Duan's avatar Fugang Duan Committed by David S. Miller
Browse files

net: fec: add eee mode tx lpi support 



The i.MX8MQ ENET version support IEEE802.3az eee mode, add
eee mode tx lpi enable to support ethtool interface.

usage:
1. set sleep and wake timer to 5ms:
ethtool --set-eee eth0 eee on tx-lpi on tx-timer 5000
2. check the eee mode:
~# ethtool --show-eee eth0
EEE Settings for eth0:
        EEE status: enabled - active
        Tx LPI: 5000 (us)
        Supported EEE link modes:  100baseT/Full
                                   1000baseT/Full
        Advertised EEE link modes:  100baseT/Full
                                    1000baseT/Full
        Link partner advertised EEE link modes:  100baseT/Full

Note: For realtime case and IEEE1588 ptp case, it should disable
EEE mode.

Signed-off-by: default avatarFugang Duan <fugang.duan@nxp.com>
Signed-off-by: default avatarJoakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 947240eb

drivers/net/ethernet/freescale/fec.h

+6 −0
Original line number Diff line number Diff line
@@ -77,6 +77,8 @@ 
#define FEC_R_DES_ACTIVE_2	0x1e8 /* Rx descriptor active for ring 2 */

#define FEC_X_DES_ACTIVE_2	0x1ec /* Tx descriptor active for ring 2 */

#define FEC_QOS_SCHEME		0x1f0 /* Set multi queues Qos scheme */

#define FEC_LPI_SLEEP		0x1f4 /* Set IEEE802.3az LPI Sleep Ts time */

#define FEC_LPI_WAKE		0x1f8 /* Set IEEE802.3az LPI Wake Tw time */

#define FEC_MIIGSK_CFGR		0x300 /* MIIGSK Configuration reg */

#define FEC_MIIGSK_ENR		0x308 /* MIIGSK Enable reg */
@@ -602,6 +604,10 @@ struct fec_enet_private { 
	unsigned int tx_time_itr;

	unsigned int itr_clk_rate;



	/* tx lpi eee mode */

	struct ethtool_eee eee;

	unsigned int clk_ref_rate;



	u32 rx_copybreak;



	/* ptp clock period in ns*/

drivers/net/ethernet/freescale/fec_main.c

+89 −0
Original line number Diff line number Diff line
@@ -2722,6 +2722,92 @@ static int fec_enet_set_tunable(struct net_device *netdev, 
	return ret;

}



/* LPI Sleep Ts count base on tx clk (clk_ref).

 * The lpi sleep cnt value = X us / (cycle_ns).

 */

static int fec_enet_us_to_tx_cycle(struct net_device *ndev, int us)

{

	struct fec_enet_private *fep = netdev_priv(ndev);



	return us * (fep->clk_ref_rate / 1000) / 1000;

}



static int fec_enet_eee_mode_set(struct net_device *ndev, bool enable)

{

	struct fec_enet_private *fep = netdev_priv(ndev);

	struct ethtool_eee *p = &fep->eee;

	unsigned int sleep_cycle, wake_cycle;

	int ret = 0;



	if (enable) {

		ret = phy_init_eee(ndev->phydev, 0);

		if (ret)

			return ret;



		sleep_cycle = fec_enet_us_to_tx_cycle(ndev, p->tx_lpi_timer);

		wake_cycle = sleep_cycle;

	} else {

		sleep_cycle = 0;

		wake_cycle = 0;

	}



	p->tx_lpi_enabled = enable;

	p->eee_enabled = enable;

	p->eee_active = enable;



	writel(sleep_cycle, fep->hwp + FEC_LPI_SLEEP);

	writel(wake_cycle, fep->hwp + FEC_LPI_WAKE);



	return 0;

}



static int

fec_enet_get_eee(struct net_device *ndev, struct ethtool_eee *edata)

{

	struct fec_enet_private *fep = netdev_priv(ndev);

	struct ethtool_eee *p = &fep->eee;



	if (!(fep->quirks & FEC_QUIRK_HAS_EEE))

		return -EOPNOTSUPP;



	if (!netif_running(ndev))

		return -ENETDOWN;



	edata->eee_enabled = p->eee_enabled;

	edata->eee_active = p->eee_active;

	edata->tx_lpi_timer = p->tx_lpi_timer;

	edata->tx_lpi_enabled = p->tx_lpi_enabled;



	return phy_ethtool_get_eee(ndev->phydev, edata);

}



static int

fec_enet_set_eee(struct net_device *ndev, struct ethtool_eee *edata)

{

	struct fec_enet_private *fep = netdev_priv(ndev);

	struct ethtool_eee *p = &fep->eee;

	int ret = 0;



	if (!(fep->quirks & FEC_QUIRK_HAS_EEE))

		return -EOPNOTSUPP;



	if (!netif_running(ndev))

		return -ENETDOWN;



	p->tx_lpi_timer = edata->tx_lpi_timer;



	if (!edata->eee_enabled || !edata->tx_lpi_enabled ||

	    !edata->tx_lpi_timer)

		ret = fec_enet_eee_mode_set(ndev, false);

	else

		ret = fec_enet_eee_mode_set(ndev, true);



	if (ret)

		return ret;



	return phy_ethtool_set_eee(ndev->phydev, edata);

}



static void

fec_enet_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)

{
@@ -2782,6 +2868,8 @@ static const struct ethtool_ops fec_enet_ethtool_ops = { 
	.set_tunable		= fec_enet_set_tunable,

	.get_wol		= fec_enet_get_wol,

	.set_wol		= fec_enet_set_wol,

	.get_eee		= fec_enet_get_eee,

	.set_eee		= fec_enet_set_eee,

	.get_link_ksettings	= phy_ethtool_get_link_ksettings,

	.set_link_ksettings	= phy_ethtool_set_link_ksettings,

	.self_test		= net_selftest,
@@ -3722,6 +3810,7 @@ fec_probe(struct platform_device *pdev) 
	fep->clk_ref = devm_clk_get(&pdev->dev, "enet_clk_ref");

	if (IS_ERR(fep->clk_ref))

		fep->clk_ref = NULL;

	fep->clk_ref_rate = clk_get_rate(fep->clk_ref);



	fep->bufdesc_ex = fep->quirks & FEC_QUIRK_HAS_BUFDESC_EX;

	fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp");