[PATCH V5 net-next 6/8] net: hibmcge: Add pauseparam supported in this module

From: Jijie Shao
Date: Fri Dec 06 2024 - 06:26:12 EST

The MAC can automatically send or respond to pause frames.
This patch supports the function of enabling pause frames
by using ethtool.

Signed-off-by: Jijie Shao <shaojijie@xxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
---
ChangeLog:
v3 -> v4:
- Support auto-neg pause, suggested by Andrew.
v3: https://lore.kernel.org/all/20241111145558.1965325-1-shaojijie@xxxxxxxxxx/
---
.../ethernet/hisilicon/hibmcge/hbg_common.h | 1 +
.../ethernet/hisilicon/hibmcge/hbg_ethtool.c | 25 +++++++++++++++++++
.../net/ethernet/hisilicon/hibmcge/hbg_hw.c | 21 ++++++++++++++++
.../net/ethernet/hisilicon/hibmcge/hbg_hw.h | 3 +++
.../net/ethernet/hisilicon/hibmcge/hbg_main.c | 1 +
.../net/ethernet/hisilicon/hibmcge/hbg_mdio.c | 15 +++++++++++
.../net/ethernet/hisilicon/hibmcge/hbg_reg.h | 2 ++
7 files changed, 68 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
index e071f77754fe..76b0b32bcb15 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
@@ -115,6 +115,7 @@ struct hbg_mac {
u32 duplex;
u32 autoneg;
u32 link_status;
+ u32 pause_autoneg;
};

struct hbg_mac_table_entry {
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
index e7f169d2abb7..a821a92db43d 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
@@ -143,12 +143,37 @@ static void hbg_ethtool_get_regs(struct net_device *netdev,
}
}

+static void hbg_ethtool_get_pauseparam(struct net_device *net_dev,
+ struct ethtool_pauseparam *param)
+{
+ struct hbg_priv *priv = netdev_priv(net_dev);
+
+ param->autoneg = priv->mac.pause_autoneg;
+ hbg_hw_get_pause_enable(priv, &param->tx_pause, &param->rx_pause);
+}
+
+static int hbg_ethtool_set_pauseparam(struct net_device *net_dev,
+ struct ethtool_pauseparam *param)
+{
+ struct hbg_priv *priv = netdev_priv(net_dev);
+
+ priv->mac.pause_autoneg = param->autoneg;
+ phy_set_asym_pause(priv->mac.phydev, param->rx_pause, param->tx_pause);
+
+ if (!param->autoneg)
+ hbg_hw_set_pause_enable(priv, param->tx_pause, param->rx_pause);
+
+ return 0;
+}
+
static const struct ethtool_ops hbg_ethtool_ops = {
.get_link = ethtool_op_get_link,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
.get_regs_len = hbg_ethtool_get_regs_len,
.get_regs = hbg_ethtool_get_regs,
+ .get_pauseparam = hbg_ethtool_get_pauseparam,
+ .set_pauseparam = hbg_ethtool_set_pauseparam,
};

void hbg_ethtool_set_ops(struct net_device *netdev)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
index 29d66a0ea0a6..0cbe9f7229b3 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
@@ -220,6 +220,27 @@ void hbg_hw_set_mac_filter_enable(struct hbg_priv *priv, u32 enable)
HBG_REG_REC_FILT_CTRL_UC_MATCH_EN_B, enable);
}

+void hbg_hw_set_pause_enable(struct hbg_priv *priv, u32 tx_en, u32 rx_en)
+{
+ hbg_reg_write_field(priv, HBG_REG_PAUSE_ENABLE_ADDR,
+ HBG_REG_PAUSE_ENABLE_TX_B, tx_en);
+ hbg_reg_write_field(priv, HBG_REG_PAUSE_ENABLE_ADDR,
+ HBG_REG_PAUSE_ENABLE_RX_B, rx_en);
+}
+
+void hbg_hw_get_pause_enable(struct hbg_priv *priv, u32 *tx_en, u32 *rx_en)
+{
+ *tx_en = hbg_reg_read_field(priv, HBG_REG_PAUSE_ENABLE_ADDR,
+ HBG_REG_PAUSE_ENABLE_TX_B);
+ *rx_en = hbg_reg_read_field(priv, HBG_REG_PAUSE_ENABLE_ADDR,
+ HBG_REG_PAUSE_ENABLE_RX_B);
+}
+
+void hbg_hw_set_rx_pause_mac_addr(struct hbg_priv *priv, u64 mac_addr)
+{
+ hbg_reg_write64(priv, HBG_REG_FD_FC_ADDR_LOW_ADDR, mac_addr);
+}
+
static void hbg_hw_init_transmit_ctrl(struct hbg_priv *priv)
{
u32 ctrl = 0;
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
index 6eb4b7d2cba8..a4a049b5121d 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
@@ -56,5 +56,8 @@ u32 hbg_hw_get_fifo_used_num(struct hbg_priv *priv, enum hbg_dir dir);
void hbg_hw_set_tx_desc(struct hbg_priv *priv, struct hbg_tx_desc *tx_desc);
void hbg_hw_fill_buffer(struct hbg_priv *priv, u32 buffer_dma_addr);
void hbg_hw_set_mac_filter_enable(struct hbg_priv *priv, u32 enable);
+void hbg_hw_set_pause_enable(struct hbg_priv *priv, u32 tx_en, u32 rx_en);
+void hbg_hw_get_pause_enable(struct hbg_priv *priv, u32 *tx_en, u32 *rx_en);
+void hbg_hw_set_rx_pause_mac_addr(struct hbg_priv *priv, u64 mac_addr);

#endif
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
index 0ad03681b706..a45a63856e61 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
@@ -204,6 +204,7 @@ static int hbg_net_set_mac_address(struct net_device *netdev, void *addr)
if (is_exists)
hbg_set_mac_to_mac_table(priv, index, NULL);

+ hbg_hw_set_rx_pause_mac_addr(priv, ether_addr_to_u64(mac_addr));
dev_addr_set(netdev, mac_addr);
return 0;
}
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_mdio.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_mdio.c
index a3479fba8501..db6bc4cfb971 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_mdio.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_mdio.c
@@ -114,6 +114,19 @@ static void hbg_mdio_init_hw(struct hbg_priv *priv)
hbg_mdio_set_command(mac, cmd);
}

+static void hbg_flowctrl_cfg(struct hbg_priv *priv)
+{
+ struct phy_device *phydev = priv->mac.phydev;
+ bool rx_pause;
+ bool tx_pause;
+
+ if (!priv->mac.pause_autoneg)
+ return;
+
+ phy_get_pause(phydev, &tx_pause, &rx_pause);
+ hbg_hw_set_pause_enable(priv, tx_pause, rx_pause);
+}
+
static void hbg_phy_adjust_link(struct net_device *netdev)
{
struct hbg_priv *priv = netdev_priv(netdev);
@@ -140,6 +153,7 @@ static void hbg_phy_adjust_link(struct net_device *netdev)
priv->mac.duplex = phydev->duplex;
priv->mac.autoneg = phydev->autoneg;
hbg_hw_adjust_link(priv, speed, phydev->duplex);
+ hbg_flowctrl_cfg(priv);
}

priv->mac.link_status = phydev->link;
@@ -168,6 +182,7 @@ static int hbg_phy_connect(struct hbg_priv *priv)
return ret;

phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+ phy_support_asym_pause(phydev);
phy_attached_info(phydev);

return 0;
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
index 665666712c7c..f12efc12f3c5 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
@@ -51,6 +51,8 @@
#define HBG_REG_PORT_ENABLE_RX_B BIT(1)
#define HBG_REG_PORT_ENABLE_TX_B BIT(2)
#define HBG_REG_PAUSE_ENABLE_ADDR (HBG_REG_SGMII_BASE + 0x0048)
+#define HBG_REG_PAUSE_ENABLE_RX_B BIT(0)
+#define HBG_REG_PAUSE_ENABLE_TX_B BIT(1)
#define HBG_REG_AN_NEG_STATE_ADDR (HBG_REG_SGMII_BASE + 0x0058)
#define HBG_REG_TRANSMIT_CTRL_ADDR (HBG_REG_SGMII_BASE + 0x0060)
#define HBG_REG_TRANSMIT_CTRL_PAD_EN_B BIT(7)
--
2.33.0