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Message-Id: <20210709081823.18696-5-qiangqing.zhang@nxp.com>
Date: Fri, 9 Jul 2021 16:18:22 +0800
From: Joakim Zhang <qiangqing.zhang@....com>
To: davem@...emloft.net, kuba@...nel.org, robh+dt@...nel.org,
andrew@...n.ch
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-imx@....com
Subject: [PATCH V1 net-next 4/5] net: fec: add eee mode tx lpi support
From: Fugang Duan <fugang.duan@....com>
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@....com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
---
drivers/net/ethernet/freescale/fec.h | 6 ++
drivers/net/ethernet/freescale/fec_main.c | 89 +++++++++++++++++++++++
2 files changed, 95 insertions(+)
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index c1f93aa79d63..0a741bc440e4 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -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*/
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index dd0b8715e84e..24082b3f2118 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -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");
--
2.17.1
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