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net: fec: add eee mode tx lpi support

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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: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Fugang Duan 2021-07-28 19:52:00 +08:00 committed by David S. Miller
parent 947240ebcc
commit b82f8c3f14
2 changed files with 95 additions and 0 deletions
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6
drivers/net/ethernet/freescale/fec.h
View File

@ -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*/

89
drivers/net/ethernet/freescale/fec_main.c
View File

@ -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");