[PATCH V11 net-next 05/10] net: hibmcge: Implement some .ndo functions

[Jijie Shao <shaojijie@huawei.com>]

Implement the .ndo_open() .ndo_stop() .ndo_set_mac_address()
and .ndo_change_mtu functions().
And .ndo_validate_addr calls the eth_validate_addr function directly

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
---
ChangeLog:
v10 -> v11:
  - return -EBUSY in ndo.change_mtu() if interface is running, suggested by Jakub.
  - Remove ndo.get_stats64() because dev_get_tstats64() do same thing.
  v10: https://lore.kernel.org/all/20240912025127.3912972-1-shaojijie@huawei.com/
v9 -> v10:
  - Use ETH_DATA_LEN instead of HBG_DEFAULT_MTU_SIZE, suggested by Andrew.
  - Add validation for mac address in hbg_net_set_mac_address()
  v9: https://lore.kernel.org/all/20240910075942.1270054-1-shaojijie@huawei.com/
v8 -> v9:
  - Remove HBG_NIC_STATE_OPEN in ndo.open() and ndo.stop(),
    suggested by Kalesh and Andrew.
  - Use netif_running() instead of hbg_nic_is_open() in ndo.change_mtu(),
    suggested by Kalesh and Andrew
  v8: https://lore.kernel.org/all/20240909023141.3234567-1-shaojijie@huawei.com/
v6 -> v7:
  - Add implement ndo.get_stats64(), suggested by Paolo.
  v6: https://lore.kernel.org/all/20240830121604.2250904-6-shaojijie@huawei.com/
v5 -> v6:
  - Delete netif_carrier_off() in .ndo_open() and .ndo_stop(),
    suggested by Jakub and Andrew.
 v5: https://lore.kernel.org/all/20240827131455.2919051-1-shaojijie@huawei.com/
v3 -> v4:
  - Delete INITED_STATE in priv, suggested by Andrew.
  - Delete unnecessary defensive code in hbg_phy_start()
    and hbg_phy_stop(), suggested by Andrew.
  v3: https://lore.kernel.org/all/20240822093334.1687011-1-shaojijie@huawei.com/
RFC v1 -> RFC v2:
  - Delete validation for mtu in hbg_net_change_mtu(), suggested by Andrew.
  - Delete validation for mac address in hbg_net_set_mac_address(),
    suggested by Andrew.
  - Add a patch to add is_valid_ether_addr check in dev_set_mac_address,
    suggested by Andrew.
  RFC v1: https://lore.kernel.org/all/20240731094245.1967834-1-shaojijie@huawei.com/
---
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.c   | 39 ++++++++
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.h   |  3 +
 .../net/ethernet/hisilicon/hibmcge/hbg_main.c | 91 +++++++++++++++++++
 .../net/ethernet/hisilicon/hibmcge/hbg_reg.h  |  9 ++
 4 files changed, 142 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
index b201f2bc4ffe..229324fa659d 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
@@ -15,6 +15,7 @@
  * ctrl means packet description, data means skb packet data
  */
 #define HBG_ENDIAN_CTRL_LE_DATA_BE	0x0
+#define HBG_PCU_FRAME_LEN_PLUS 4
 
 static bool hbg_hw_spec_is_valid(struct hbg_priv *priv)
 {
@@ -129,6 +130,44 @@ void hbg_hw_irq_enable(struct hbg_priv *priv, u32 mask, bool enable)
 	hbg_reg_write(priv, HBG_REG_CF_INTRPT_MSK_ADDR, value);
 }
 
+void hbg_hw_set_uc_addr(struct hbg_priv *priv, u64 mac_addr)
+{
+	hbg_reg_write64(priv, HBG_REG_STATION_ADDR_LOW_2_ADDR, mac_addr);
+}
+
+static void hbg_hw_set_pcu_max_frame_len(struct hbg_priv *priv,
+					 u16 max_frame_len)
+{
+	max_frame_len = max_t(u32, max_frame_len, ETH_DATA_LEN);
+
+	/* lower two bits of value must be set to 0. Otherwise, the value is ignored */
+	max_frame_len = round_up(max_frame_len, HBG_PCU_FRAME_LEN_PLUS);
+
+	hbg_reg_write_field(priv, HBG_REG_MAX_FRAME_LEN_ADDR,
+			    HBG_REG_MAX_FRAME_LEN_M, max_frame_len);
+}
+
+static void hbg_hw_set_mac_max_frame_len(struct hbg_priv *priv,
+					 u16 max_frame_size)
+{
+	hbg_reg_write_field(priv, HBG_REG_MAX_FRAME_SIZE_ADDR,
+			    HBG_REG_MAX_FRAME_LEN_M, max_frame_size);
+}
+
+void hbg_hw_set_mtu(struct hbg_priv *priv, u16 mtu)
+{
+	hbg_hw_set_pcu_max_frame_len(priv, mtu);
+	hbg_hw_set_mac_max_frame_len(priv, mtu);
+}
+
+void hbg_hw_mac_enable(struct hbg_priv *priv, u32 enable)
+{
+	hbg_reg_write_field(priv, HBG_REG_PORT_ENABLE_ADDR,
+			    HBG_REG_PORT_ENABLE_TX_B, enable);
+	hbg_reg_write_field(priv, HBG_REG_PORT_ENABLE_ADDR,
+			    HBG_REG_PORT_ENABLE_RX_B, enable);
+}
+
 void hbg_hw_adjust_link(struct hbg_priv *priv, u32 speed, u32 duplex)
 {
 	hbg_reg_write_field(priv, HBG_REG_PORT_MODE_ADDR,
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
index 4d09bdd41c76..0ce500e907b3 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
@@ -49,5 +49,8 @@ u32 hbg_hw_get_irq_status(struct hbg_priv *priv);
 void hbg_hw_irq_clear(struct hbg_priv *priv, u32 mask);
 bool hbg_hw_irq_is_enabled(struct hbg_priv *priv, u32 mask);
 void hbg_hw_irq_enable(struct hbg_priv *priv, u32 mask, bool enable);
+void hbg_hw_set_mtu(struct hbg_priv *priv, u16 mtu);
+void hbg_hw_mac_enable(struct hbg_priv *priv, u32 enable);
+void hbg_hw_set_uc_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 e71ff821c582..3f6f3b381c50 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
@@ -2,6 +2,7 @@
 // Copyright (c) 2024 Hisilicon Limited.
 
 #include <linux/etherdevice.h>
+#include <linux/if_vlan.h>
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include "hbg_common.h"
@@ -9,6 +10,90 @@
 #include "hbg_irq.h"
 #include "hbg_mdio.h"
 
+static void hbg_all_irq_enable(struct hbg_priv *priv, bool enabled)
+{
+	struct hbg_irq_info *info;
+	u32 i;
+
+	for (i = 0; i < priv->vectors.info_array_len; i++) {
+		info = &priv->vectors.info_array[i];
+		hbg_hw_irq_enable(priv, info->mask, enabled);
+	}
+}
+
+static int hbg_net_open(struct net_device *netdev)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	hbg_all_irq_enable(priv, true);
+	hbg_hw_mac_enable(priv, HBG_STATUS_ENABLE);
+	netif_start_queue(netdev);
+	hbg_phy_start(priv);
+
+	return 0;
+}
+
+static int hbg_net_stop(struct net_device *netdev)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	hbg_phy_stop(priv);
+	netif_stop_queue(netdev);
+	hbg_hw_mac_enable(priv, HBG_STATUS_DISABLE);
+	hbg_all_irq_enable(priv, false);
+
+	return 0;
+}
+
+static int hbg_net_set_mac_address(struct net_device *netdev, void *addr)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+	u8 *mac_addr;
+
+	mac_addr = ((struct sockaddr *)addr)->sa_data;
+
+	if (!is_valid_ether_addr(mac_addr))
+		return -EADDRNOTAVAIL;
+
+	hbg_hw_set_uc_addr(priv, ether_addr_to_u64(mac_addr));
+	dev_addr_set(netdev, mac_addr);
+
+	return 0;
+}
+
+static void hbg_change_mtu(struct hbg_priv *priv, int new_mtu)
+{
+	u32 frame_len;
+
+	frame_len = new_mtu + VLAN_HLEN * priv->dev_specs.vlan_layers +
+		    ETH_HLEN + ETH_FCS_LEN;
+	hbg_hw_set_mtu(priv, frame_len);
+}
+
+static int hbg_net_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	if (netif_running(netdev))
+		return -EBUSY;
+
+	hbg_change_mtu(priv, new_mtu);
+	WRITE_ONCE(netdev->mtu, new_mtu);
+
+	dev_dbg(&priv->pdev->dev,
+		"change mtu from %u to %u\n", netdev->mtu, new_mtu);
+
+	return 0;
+}
+
+static const struct net_device_ops hbg_netdev_ops = {
+	.ndo_open		= hbg_net_open,
+	.ndo_stop		= hbg_net_stop,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_set_mac_address	= hbg_net_set_mac_address,
+	.ndo_change_mtu		= hbg_net_change_mtu,
+};
+
 static int hbg_init(struct hbg_priv *priv)
 {
 	int ret;
@@ -82,6 +167,12 @@ static int hbg_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return ret;
 
 	netdev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
+	netdev->max_mtu = priv->dev_specs.max_mtu;
+	netdev->min_mtu = priv->dev_specs.min_mtu;
+	netdev->netdev_ops = &hbg_netdev_ops;
+
+	hbg_change_mtu(priv, ETH_DATA_LEN);
+	hbg_net_set_mac_address(priv->netdev, &priv->dev_specs.mac_addr);
 
 	ret = devm_register_netdev(dev, netdev);
 	if (ret)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
index 8cdf018c2de9..fbc17ca5564f 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
@@ -37,8 +37,12 @@
 #define HBG_REG_SGMII_BASE			0x10000
 #define HBG_REG_DUPLEX_TYPE_ADDR		(HBG_REG_SGMII_BASE + 0x0008)
 #define HBG_REG_DUPLEX_B			BIT(0)
+#define HBG_REG_MAX_FRAME_SIZE_ADDR		(HBG_REG_SGMII_BASE + 0x003C)
 #define HBG_REG_PORT_MODE_ADDR			(HBG_REG_SGMII_BASE + 0x0040)
 #define HBG_REG_PORT_MODE_M			GENMASK(3, 0)
+#define HBG_REG_PORT_ENABLE_ADDR		(HBG_REG_SGMII_BASE + 0x0044)
+#define HBG_REG_PORT_ENABLE_RX_B		BIT(1)
+#define HBG_REG_PORT_ENABLE_TX_B		BIT(2)
 #define HBG_REG_TRANSMIT_CTRL_ADDR		(HBG_REG_SGMII_BASE + 0x0060)
 #define HBG_REG_TRANSMIT_CTRL_PAD_EN_B		BIT(7)
 #define HBG_REG_TRANSMIT_CTRL_CRC_ADD_B		BIT(6)
@@ -49,6 +53,8 @@
 #define HBG_REG_MODE_CHANGE_EN_B		BIT(0)
 #define HBG_REG_RECV_CTRL_ADDR			(HBG_REG_SGMII_BASE + 0x01E0)
 #define HBG_REG_RECV_CTRL_STRIP_PAD_EN_B	BIT(3)
+#define HBG_REG_STATION_ADDR_LOW_2_ADDR		(HBG_REG_SGMII_BASE + 0x0210)
+#define HBG_REG_STATION_ADDR_HIGH_2_ADDR	(HBG_REG_SGMII_BASE + 0x0214)
 
 /* PCU */
 #define HBG_REG_CF_INTRPT_MSK_ADDR		(HBG_REG_SGMII_BASE + 0x042C)
@@ -72,6 +78,8 @@
 #define HBG_INT_MSK_RX_B			BIT(0) /* just used in driver */
 #define HBG_REG_CF_INTRPT_STAT_ADDR		(HBG_REG_SGMII_BASE + 0x0434)
 #define HBG_REG_CF_INTRPT_CLR_ADDR		(HBG_REG_SGMII_BASE + 0x0438)
+#define HBG_REG_MAX_FRAME_LEN_ADDR		(HBG_REG_SGMII_BASE + 0x0444)
+#define HBG_REG_MAX_FRAME_LEN_M			GENMASK(15, 0)
 #define HBG_REG_RX_BUF_SIZE_ADDR		(HBG_REG_SGMII_BASE + 0x04E4)
 #define HBG_REG_RX_BUF_SIZE_M			GENMASK(15, 0)
 #define HBG_REG_BUS_CTRL_ADDR			(HBG_REG_SGMII_BASE + 0x04E8)
@@ -86,6 +94,7 @@
 #define HBG_REG_RX_PKT_MODE_ADDR		(HBG_REG_SGMII_BASE + 0x04F4)
 #define HBG_REG_RX_PKT_MODE_PARSE_MODE_M	GENMASK(22, 21)
 #define HBG_REG_CF_IND_TXINT_MSK_ADDR		(HBG_REG_SGMII_BASE + 0x0694)
+#define HBG_REG_IND_INTR_MASK_B			BIT(0)
 #define HBG_REG_CF_IND_TXINT_STAT_ADDR		(HBG_REG_SGMII_BASE + 0x0698)
 #define HBG_REG_CF_IND_TXINT_CLR_ADDR		(HBG_REG_SGMII_BASE + 0x069C)
 #define HBG_REG_CF_IND_RXINT_MSK_ADDR		(HBG_REG_SGMII_BASE + 0x06a0)
-- 
2.33.0