Re: [PATCH V8 net-next 05/11] net: hibmcge: Implement some .ndo functions

From: Kalesh Anakkur Purayil
Date: Sun Sep 08 2024 - 23:06:18 EST

On Mon, Sep 9, 2024 at 8:11 AM Jijie Shao <shaojijie@xxxxxxxxxx> wrote:
>
> Implement the .ndo_open() .ndo_stop() .ndo_set_mac_address()
> .ndo_change_mtu functions() and ndo.get_stats64()
> And .ndo_validate_addr calls the eth_validate_addr function directly
>
> Signed-off-by: Jijie Shao <shaojijie@xxxxxxxxxx>
> ---
> ChangeLog:
> v6 -> v7:
> - Add implement ndo.get_stats64(), suggested by Paolo.
> v6: https://lore.kernel.org/all/20240830121604.2250904-6-shaojijie@xxxxxxxxxx/
> 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@xxxxxxxxxx/
> 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@xxxxxxxxxx/
> 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@xxxxxxxxxx/
> ---
> .../ethernet/hisilicon/hibmcge/hbg_common.h | 3 +
> .../net/ethernet/hisilicon/hibmcge/hbg_hw.c | 39 +++++++
> .../net/ethernet/hisilicon/hibmcge/hbg_hw.h | 3 +
> .../net/ethernet/hisilicon/hibmcge/hbg_main.c | 104 ++++++++++++++++++
> .../net/ethernet/hisilicon/hibmcge/hbg_reg.h | 11 +-
> 5 files changed, 159 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
> index e94ae2be5c4c..d11ef081f4da 100644
> --- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
> +++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
> @@ -17,8 +17,11 @@
>
> enum hbg_nic_state {
> HBG_NIC_STATE_EVENT_HANDLING = 0,
> + HBG_NIC_STATE_OPEN,
> };
>
> +#define hbg_nic_is_open(priv) test_bit(HBG_NIC_STATE_OPEN, &(priv)->state)
> +
> enum hbg_hw_event_type {
> HBG_HW_EVENT_NONE = 0,
> HBG_HW_EVENT_INIT, /* driver is loading */
> diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
> index 8e971e9f62a0..97fee714155a 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, HBG_DEFAULT_MTU_SIZE);
> +
> + /* 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 29e0513fa836..f4e9f6205f04 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 +10,104 @@
> #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);
> +
> + if (test_and_set_bit(HBG_NIC_STATE_OPEN, &priv->state))
> + return 0;
[Kalesh] Is there a possibility that dev_open() can be invoked twice?
> +
> + 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);
> +
> + if (!hbg_nic_is_open(priv))
> + return 0;
[Kalesh] Is there any reason to not check HBG_NIC_STATE_OPEN here?
> +
> + clear_bit(HBG_NIC_STATE_OPEN, &priv->state);
> +
> + 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;
> +
> + 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);
> + bool is_opened = hbg_nic_is_open(priv);
> +
> + hbg_net_stop(netdev);
[Kalesh] Do you still need to call stop when NIC is not opened yet?
Instead of a new variable, I think you can check netif_running here.
> +
> + 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);
> + if (is_opened)
> + hbg_net_open(netdev);
> + return 0;
> +}
> +
> +static void hbg_net_get_stats64(struct net_device *netdev,
> + struct rtnl_link_stats64 *stats)
> +{
> + netdev_stats_to_stats64(stats, &netdev->stats);
> + dev_fetch_sw_netstats(stats, netdev->tstats);
> +}
> +
> +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,
> + .ndo_get_stats64 = hbg_net_get_stats64,
> +};
> +
> static int hbg_init(struct hbg_priv *priv)
> {
> int ret;
> @@ -73,6 +172,7 @@ static int hbg_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> priv = netdev_priv(netdev);
> priv->netdev = netdev;
> priv->pdev = pdev;
> + netdev->netdev_ops = &hbg_netdev_ops;
>
> netdev->tstats = devm_netdev_alloc_pcpu_stats(&pdev->dev,
> struct pcpu_sw_netstats);
> @@ -88,6 +188,10 @@ static int hbg_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> if (ret)
> return ret;
>
> + netdev->max_mtu = priv->dev_specs.max_mtu;
> + netdev->min_mtu = priv->dev_specs.min_mtu;
> + hbg_change_mtu(priv, HBG_DEFAULT_MTU_SIZE);
> + hbg_net_set_mac_address(priv->netdev, &priv->dev_specs.mac_addr);
> ret = devm_register_netdev(dev, netdev);
> if (ret)
> return dev_err_probe(dev, ret, "failed to register netdev\n");
> diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
> index b0991063ccba..63bb1bead8c0 100644
> --- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
> +++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
> @@ -37,18 +37,24 @@
> #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_CONTROL_ADDR (HBG_REG_SGMII_BASE + 0x0060)
> #define HBG_REG_TRANSMIT_CONTROL_PAD_EN_B BIT(7)
> #define HBG_REG_TRANSMIT_CONTROL_CRC_ADD_B BIT(6)
> #define HBG_REG_TRANSMIT_CONTROL_AN_EN_B BIT(5)
> #define HBG_REG_CF_CRC_STRIP_ADDR (HBG_REG_SGMII_BASE + 0x01B0)
> -#define HBG_REG_CF_CRC_STRIP_B BIT(0)
> +#define HBG_REG_CF_CRC_STRIP_B BIT(1)
> #define HBG_REG_MODE_CHANGE_EN_ADDR (HBG_REG_SGMII_BASE + 0x01B4)
> #define HBG_REG_MODE_CHANGE_EN_B BIT(0)
> #define HBG_REG_RECV_CONTROL_ADDR (HBG_REG_SGMII_BASE + 0x01E0)
> #define HBG_REG_RECV_CONTROL_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
>
>


--
Regards,
Kalesh A P

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