RK3588 · DesignWare GMAC

DW GMAC / RK3588

RK3588

Rockchip · ARM Cortex-A76/A55 八核 · 2.4GHz

···Armory 获取

1G×2双网口

RGMIIPHY 接口

RSS多队列

PTP硬件时间戳

板卡配置

Rockchip EVBRockchip 官方评估板

稳定

PHY 型号RTL8211F

PHY 地址0x00 / 0x01

PHY 接口RGMII_ID

参考时钟125 MHz (内部 PLL)

特殊说明

• GMAC0 PHY 地址 0x00，GMAC1 PHY 地址 0x01
• TX/RX delay 由 SoC 内部 IOdomain 提供

网卡设备树配置

gmac0: ethernet@fe1b0000 {
  compatible = "rockchip,rk3588-gmac", "snps,dwmac-4.20a";
  reg = <0x0 0xfe1b0000 0x0 0x10000>;
  interrupts = <GIC_SPI 227 IRQ_TYPE_LEVEL_HIGH>,
          <GIC_SPI 226 IRQ_TYPE_LEVEL_HIGH>;
  interrupt-names = "macirq", "eth_wake_irq";
  rockchip,grf = <&sys_grf>;
  rockchip,php_grf = <&php_grf>;
  clocks = <&cru CLK_GMAC_125M>, <&cru CLK_GMAC_50M>,
      <&cru PCLK_GMAC0>, <&cru ACLK_GMAC0>,
      <&cru CLK_GMAC0_PTP_REF>;
  clock-names = "stmmaceth", "clk_mac_ref",
          "pclk_mac", "aclk_mac",
          "ptp_ref";
  resets = <&cru SRST_A_GMAC0>;
  reset-names = "stmmaceth";
  power-domains = <&power RK3588_PD_GMAC>;

  snps,mixed-burst;
  snps,tso;

  snps,axi-config = <&gmac0_stmmac_axi_setup>;
  snps,mtl-rx-config = <&gmac0_mtl_rx_setup>;
  snps,mtl-tx-config = <&gmac0_mtl_tx_setup>;
  status = "disabled";

  mdio0: mdio {
    compatible = "snps,dwmac-mdio";
    #address-cells = <0x1>;
    #size-cells = <0x0>;
  };

  gmac0_stmmac_axi_setup: stmmac-axi-config {
    snps,wr_osr_lmt = <4>;
    snps,rd_osr_lmt = <8>;
    snps,blen = <0 0 0 0 16 8 4>;
  };

  gmac0_mtl_rx_setup: rx-queues-config {
    snps,rx-queues-to-use = <1>;
    queue0 {};
  };

  gmac0_mtl_tx_setup: tx-queues-config {
    snps,tx-queues-to-use = <1>;
    queue0 {};
  };
};
gmac1: ethernet@fe1c0000 {
  compatible = "rockchip,rk3588-gmac", "snps,dwmac-4.20a";
  reg = <0x0 0xfe1c0000 0x0 0x10000>;
  interrupts = <GIC_SPI 234 IRQ_TYPE_LEVEL_HIGH>,
          <GIC_SPI 233 IRQ_TYPE_LEVEL_HIGH>;
  interrupt-names = "macirq", "eth_wake_irq";
  rockchip,grf = <&sys_grf>;
  rockchip,php_grf = <&php_grf>;
  clocks = <&cru CLK_GMAC_125M>, <&cru CLK_GMAC_50M>,
      <&cru PCLK_GMAC1>, <&cru ACLK_GMAC1>,
      <&cru CLK_GMAC1_PTP_REF>;
  clock-names = "stmmaceth", "clk_mac_ref",
          "pclk_mac", "aclk_mac",
          "ptp_ref";
  resets = <&cru SRST_A_GMAC1>;
  reset-names = "stmmaceth";
  power-domains = <&power RK3588_PD_GMAC>;

  snps,mixed-burst;
  snps,tso;

  snps,axi-config = <&gmac1_stmmac_axi_setup>;
  snps,mtl-rx-config = <&gmac1_mtl_rx_setup>;
  snps,mtl-tx-config = <&gmac1_mtl_tx_setup>;
  status = "disabled";

  mdio1: mdio {
    compatible = "snps,dwmac-mdio";
    #address-cells = <0x1>;
    #size-cells = <0x0>;
  };

  gmac1_stmmac_axi_setup: stmmac-axi-config {
    snps,wr_osr_lmt = <4>;
    snps,rd_osr_lmt = <8>;
    snps,blen = <0 0 0 0 16 8 4>;
  };

  gmac1_mtl_rx_setup: rx-queues-config {
    snps,rx-queues-to-use = <1>;
    queue0 {};
  };

  gmac1_mtl_tx_setup: tx-queues-config {
    snps,tx-queues-to-use = <1>;
    queue0 {};
  };
};

SoC 级说明

网口映射

网口	控制器基地址	IRQ
eth0 (GMAC0)	0xFE1B0000	227
eth1 (GMAC1)	0xFE1C0000	228

时钟配置

RK3588 GMAC 时钟由 CLK_GMAC0/1 提供，默认 125 MHz。TX/RX delay 通过 IODOMAIN 和 GRF 寄存器控制，驱动默认配置 TX delay=0x30, RX delay=0x11，可根据 PCB 走线调整。

多队列 RSS

RK3588 支持 4 发 / 4 收队列，可通过 NIC_IOCTL_SET_RSS 启用多核接收分流：

nic_rss_cfg_t rss = { .rx_queues = 4, .tx_queues = 4,
                      .hash_type = NIC_RSS_HASH_TCP4 };
nic_ioctl(&g_nic, NIC_IOCTL_SET_RSS, &rss);

已知问题

已知双网口同时满速时，偶发 GMAC1 RX FIFO 溢出，建议限速至 950 Mbps

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