RE: [EXT] [PATCH 2/3] net: stmmac: Add NXP S32 SoC family support

From: Jan Petrous (OSS)
Date: Sun Mar 17 2024 - 14:26:56 EST

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> Add support for NXP S32 SoC family's GMAC to the stmmac network driver.
> This driver implementation is based on the patchset originally contributed by
> Chester Lin [1], which itself draws heavily from NXP's downstream
> implementation [2]. The patchset was never merged.
>

Hi Wadim,

Thank you for your upstreaming activities, but I would like to note that
the old NXP S32CC stmmac glue was rewritten lately and will be part of next
NXP BSP Linux release planned for April.

The rework was done mainly to allow simpler upstreaming process, so I would recommend
to postpone your current work.

Thanks.
/Jan

> The S32G2/3 SoCs feature multiple Ethernet interfaces (PFE0, PFE1, PFE2, and
> GMAC) which can be routed through a SerDes Subsystem, supporting various
> interfaces such as SGMII and RGMII. However, the current Glue Code lacks
> support for SerDes routing and pinctrl handling, relying solely on correct
> settings in U-Boot. Clock settings for this SoC are managed by the ATF
> Firmware.
>
> Changes made compared to [1]:
>
> Rebased onto Linux 6.8-rc7
> Consolidated into a single commit
> Minor adjustments in naming and usage of dev_err()/dev_info()
>
> Test Environment:
> The driver has been successfully tested on the official S32G-VNP-RDB3
> Reference Design Board from NXP, utilizing an S32G3 SoC. The firmware and
> U-Boot used were from the BSP39 Release. The official BSP39 Ubuntu 22.04
> Release was successfully booted. A network stress test using iperf [3] was also
> executed without issues.
>
> [1]
> https://patchw/
> ork.kernel.org%2Fproject%2Fnetdevbpf%2Fpatch%2F20221031101052.14956-
> 6-
> clin%40suse.com%2F%2325068228&data=05%7C02%7Cjan.petrous%40nxp.c
> om%7C0cc5c9f3d01f4ffd9c8808dc453f46e2%7C686ea1d3bc2b4c6fa92cd99c5
> c301635%7C0%7C0%7C638461385281642147%7CUnknown%7CTWFpbGZsb3
> d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%
> 3D%7C0%7C%7C%7C&sdata=rIngeRww4WVHGJtI9z9nQssulWK772YoRkOcB0
> uKoN0%3D&reserved=0
> [2]
> https://github/.
> com%2Fnxp-auto-linux%2Flinux%2Fblob%2Frelease%2Fbsp39.0-5.15.129-
> rt%2Fdrivers%2Fnet%2Fethernet%2Fstmicro%2Fstmmac%2Fdwmac-
> s32cc.c&data=05%7C02%7Cjan.petrous%40nxp.com%7C0cc5c9f3d01f4ffd9c8
> 808dc453f46e2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C6384
> 61385281650452%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL
> CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata
> =y1EPryNiZIM4lzzTGPfcY4QGHgG8omiOKM8LfTkUqBs%3D&reserved=0
> [3]
> https://linux.di/
> e.net%2Fman%2F1%2Fiperf&data=05%7C02%7Cjan.petrous%40nxp.com%7C
> 0cc5c9f3d01f4ffd9c8808dc453f46e2%7C686ea1d3bc2b4c6fa92cd99c5c301635
> %7C0%7C0%7C638461385281656709%7CUnknown%7CTWFpbGZsb3d8eyJWI
> joiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0
> %7C%7C%7C&sdata=ydOwCmVhv4C40MIdo%2F5BCUHr588N%2B%2BqRxeKA
> gCjwlT4%3D&reserved=0
> [4]
> https://github/.
> com%2Fnxp-auto-linux%2Fu-
> boot&data=05%7C02%7Cjan.petrous%40nxp.com%7C0cc5c9f3d01f4ffd9c880
> 8dc453f46e2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638461
> 385281661168%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJ
> QIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=R
> vq1e2h%2FdF0ZAAR7rTNWDM9k4ktVlZV3D3Oi0ZDVtts%3D&reserved=0
> [5]
> https://github/.
> com%2Fnxp-auto-linux%2Farm-trusted-
> firmware&data=05%7C02%7Cjan.petrous%40nxp.com%7C0cc5c9f3d01f4ffd9c
> 8808dc453f46e2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638
> 461385281665752%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAi
> LCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdat
> a=YaU2kR6PC0%2FkpZ7htdJuLY555XliyI7GU%2BH6TneNSIE%3D&reserved=0
>
> Signed-off-by: Wadim Mueller <wafgo01@xxxxxxxxx>
> ---
> drivers/net/ethernet/stmicro/stmmac/Kconfig | 12 +
> drivers/net/ethernet/stmicro/stmmac/Makefile | 1 +
> drivers/net/ethernet/stmicro/stmmac/common.h | 3 +
> .../net/ethernet/stmicro/stmmac/dwmac-s32.c | 313 ++++++++++++++++++
> .../net/ethernet/stmicro/stmmac/dwmac4_dma.c | 9 +
> .../net/ethernet/stmicro/stmmac/dwmac4_dma.h | 3 +
> drivers/net/ethernet/stmicro/stmmac/hwif.h | 5 +
> .../net/ethernet/stmicro/stmmac/stmmac_main.c | 7 +
> include/linux/stmmac.h | 9 +
> 9 files changed, 362 insertions(+)
> create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig
> b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> index 85dcda51df05..1cdf2da0251c 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
> +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> @@ -142,6 +142,18 @@ config DWMAC_ROCKCHIP
> This selects the Rockchip RK3288 SoC glue layer support for
> the stmmac device driver.
>
> +config DWMAC_S32
> + tristate "NXP S32 series GMAC support"
> + default ARCH_S32
> + depends on OF && (ARCH_S32 || COMPILE_TEST)
> + select PHYLINK
> + help
> + Support for ethernet controller on NXP S32 series SOCs.
> +
> + This selects NXP SoC glue layer support for the stmmac
> + device driver. This driver is used for the S32 series
> + SOCs GMAC ethernet controller.
> +
> config DWMAC_SOCFPGA
> tristate "SOCFPGA dwmac support"
> default ARCH_INTEL_SOCFPGA
> diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile
> b/drivers/net/ethernet/stmicro/stmmac/Makefile
> index 26cad4344701..c48ff95ed972 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/Makefile
> +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
> @@ -34,6 +34,7 @@ obj-$(CONFIG_DWMAC_GENERIC) += dwmac-generic.o
> obj-$(CONFIG_DWMAC_IMX8) += dwmac-imx.o
> obj-$(CONFIG_DWMAC_TEGRA) += dwmac-tegra.o
> obj-$(CONFIG_DWMAC_VISCONTI) += dwmac-visconti.o
> +obj-$(CONFIG_DWMAC_S32) += dwmac-s32.o
> stmmac-platform-objs:= stmmac_platform.o
> dwmac-altr-socfpga-objs := dwmac-socfpga.o
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h
> b/drivers/net/ethernet/stmicro/stmmac/common.h
> index 5ba606a596e7..e5e23e8c07e1 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/common.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/common.h
> @@ -254,6 +254,9 @@ struct stmmac_safety_stats {
> #define CSR_F_150M 150000000
> #define CSR_F_250M 250000000
> #define CSR_F_300M 300000000
> +#define CSR_F_500M 500000000
> +#define CSR_F_800M 800000000
> +
>
> #define MAC_CSR_H_FRQ_MASK 0x20
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
> new file mode 100644
> index 000000000000..1920eeed2269
> --- /dev/null
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
> @@ -0,0 +1,313 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * DWMAC Specific Glue layer for NXP S32 SoCs
> + *
> + * Copyright (C) 2019-2022 NXP
> + * Copyright (C) 2022 SUSE LLC
> + *
> + */
> +
> +#include <linux/device.h>
> +#include <linux/ethtool.h>
> +#include <linux/module.h>
> +#include <linux/io.h>
> +#include <linux/clk.h>
> +#include <linux/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/of.h>
> +#include <linux/of_net.h>
> +#include <linux/of_address.h>
> +#include <linux/stmmac.h>
> +#include "stmmac_platform.h"
> +
> +#define GMAC_TX_RATE_125M 125000000 /* 125MHz */
> +#define GMAC_TX_RATE_25M 25000000 /* 25MHz */
> +#define GMAC_TX_RATE_2M5 2500000 /* 2.5MHz */
> +
> +/* S32 SRC register for phyif selection */
> +#define PHY_INTF_SEL_MII 0x00
> +#define PHY_INTF_SEL_SGMII 0x01
> +#define PHY_INTF_SEL_RGMII 0x02
> +#define PHY_INTF_SEL_RMII 0x08
> +
> +/* AXI4 ACE control settings */
> +#define ACE_DOMAIN_SIGNAL 0x2
> +#define ACE_CACHE_SIGNAL 0xf
> +#define ACE_CONTROL_SIGNALS ((ACE_DOMAIN_SIGNAL << 4) |
> ACE_CACHE_SIGNAL)
> +#define ACE_PROTECTION 0x2
> +
> +struct s32_priv_data {
> + void __iomem *ctrl_sts;
> + struct device *dev;
> + phy_interface_t intf_mode;
> + struct clk *tx_clk;
> + struct clk *rx_clk;
> +};
> +
> +static int s32_gmac_init(struct platform_device *pdev, void *priv)
> +{
> + struct s32_priv_data *gmac = priv;
> + u32 intf_sel;
> + int ret;
> +
> + if (gmac->tx_clk) {
> + ret = clk_prepare_enable(gmac->tx_clk);
> + if (ret) {
> + dev_err(&pdev->dev, "Can't set tx clock\n");
> + return ret;
> + }
> + }
> +
> + if (gmac->rx_clk) {
> + ret = clk_prepare_enable(gmac->rx_clk);
> + if (ret) {
> + dev_err(&pdev->dev, "Can't set rx clock\n");
> + return ret;
> + }
> + }
> +
> + /* set interface mode */
> + if (gmac->ctrl_sts) {
> + switch (gmac->intf_mode) {
> + default:
> + dev_info(
> + &pdev->dev,
> + "unsupported mode %u, set the default phy mode.\n",
> + gmac->intf_mode);
> + fallthrough;
> + case PHY_INTERFACE_MODE_SGMII:
> + dev_info(&pdev->dev, "phy mode set to SGMII\n");
> + intf_sel = PHY_INTF_SEL_SGMII;
> + break;
> + case PHY_INTERFACE_MODE_RGMII:
> + case PHY_INTERFACE_MODE_RGMII_ID:
> + case PHY_INTERFACE_MODE_RGMII_TXID:
> + case PHY_INTERFACE_MODE_RGMII_RXID:
> + dev_info(&pdev->dev, "phy mode set to RGMII\n");
> + intf_sel = PHY_INTF_SEL_RGMII;
> + break;
> + case PHY_INTERFACE_MODE_RMII:
> + dev_info(&pdev->dev, "phy mode set to RMII\n");
> + intf_sel = PHY_INTF_SEL_RMII;
> + break;
> + case PHY_INTERFACE_MODE_MII:
> + dev_info(&pdev->dev, "phy mode set to MII\n");
> + intf_sel = PHY_INTF_SEL_MII;
> + break;
> + }
> +
> + writel(intf_sel, gmac->ctrl_sts);
> + }
> +
> + return 0;
> +}
> +
> +static void s32_gmac_exit(struct platform_device *pdev, void *priv)
> +{
> + struct s32_priv_data *gmac = priv;
> +
> + if (gmac->tx_clk)
> + clk_disable_unprepare(gmac->tx_clk);
> +
> + if (gmac->rx_clk)
> + clk_disable_unprepare(gmac->rx_clk);
> +}
> +
> +static void s32_fix_speed(void *priv, unsigned int speed, unsigned int mode)
> +{
> + struct s32_priv_data *gmac = priv;
> +
> + if (!gmac->tx_clk || !gmac->rx_clk)
> + return;
> +
> + /* SGMII mode doesn't support the clock reconfiguration */
> + if (gmac->intf_mode == PHY_INTERFACE_MODE_SGMII)
> + return;
> +
> + switch (speed) {
> + case SPEED_1000:
> + dev_info(gmac->dev, "Set TX clock to 125M\n");
> + clk_set_rate(gmac->tx_clk, GMAC_TX_RATE_125M);
> + break;
> + case SPEED_100:
> + dev_info(gmac->dev, "Set TX clock to 25M\n");
> + clk_set_rate(gmac->tx_clk, GMAC_TX_RATE_25M);
> + break;
> + case SPEED_10:
> + dev_info(gmac->dev, "Set TX clock to 2.5M\n");
> + clk_set_rate(gmac->tx_clk, GMAC_TX_RATE_2M5);
> + break;
> + default:
> + dev_err(gmac->dev, "Unsupported/Invalid speed: %d\n", speed);
> + return;
> + }
> +}
> +
> +static int s32_config_cache_coherency(struct platform_device *pdev,
> + struct plat_stmmacenet_data *plat_dat)
> +{
> + plat_dat->axi4_ace_ctrl = devm_kzalloc(
> + &pdev->dev, sizeof(struct stmmac_axi4_ace_ctrl), GFP_KERNEL);
> +
> + if (!plat_dat->axi4_ace_ctrl)
> + return -ENOMEM;
> +
> + plat_dat->axi4_ace_ctrl->tx_ar_reg = (ACE_CONTROL_SIGNALS << 16) |
> + (ACE_CONTROL_SIGNALS << 8) |
> + ACE_CONTROL_SIGNALS;
> +
> + plat_dat->axi4_ace_ctrl->rx_aw_reg =
> + (ACE_CONTROL_SIGNALS << 24) | (ACE_CONTROL_SIGNALS << 16) |
> + (ACE_CONTROL_SIGNALS << 8) | ACE_CONTROL_SIGNALS;
> +
> + plat_dat->axi4_ace_ctrl->txrx_awar_reg =
> + (ACE_PROTECTION << 20) | (ACE_PROTECTION << 16) |
> + (ACE_CONTROL_SIGNALS << 8) | ACE_CONTROL_SIGNALS;
> +
> + return 0;
> +}
> +
> +static int s32_dwmac_probe(struct platform_device *pdev)
> +{
> + struct plat_stmmacenet_data *plat_dat;
> + struct stmmac_resources stmmac_res;
> + struct s32_priv_data *gmac;
> + struct resource *res;
> + const char *tx_clk, *rx_clk;
> + int ret;
> +
> + ret = stmmac_get_platform_resources(pdev, &stmmac_res);
> + if (ret)
> + return ret;
> +
> + gmac = devm_kzalloc(&pdev->dev, sizeof(*gmac), GFP_KERNEL);
> + if (!gmac)
> + return PTR_ERR(gmac);
> +
> + gmac->dev = &pdev->dev;
> +
> + /* S32G control reg */
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> + gmac->ctrl_sts = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR_OR_NULL(gmac->ctrl_sts)) {
> + dev_err(&pdev->dev, "S32G config region is missing\n");
> + return PTR_ERR(gmac->ctrl_sts);
> + }
> +
> + plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
> + if (IS_ERR(plat_dat))
> + return PTR_ERR(plat_dat);
> +
> + plat_dat->bsp_priv = gmac;
> +
> + switch (plat_dat->phy_interface) {
> + case PHY_INTERFACE_MODE_SGMII:
> + tx_clk = "tx_sgmii";
> + rx_clk = "rx_sgmii";
> + break;
> + case PHY_INTERFACE_MODE_RGMII:
> + case PHY_INTERFACE_MODE_RGMII_ID:
> + case PHY_INTERFACE_MODE_RGMII_TXID:
> + case PHY_INTERFACE_MODE_RGMII_RXID:
> + tx_clk = "tx_rgmii";
> + rx_clk = "rx_rgmii";
> + break;
> + case PHY_INTERFACE_MODE_RMII:
> + tx_clk = "tx_rmii";
> + rx_clk = "rx_rmii";
> + break;
> + case PHY_INTERFACE_MODE_MII:
> + tx_clk = "tx_mii";
> + rx_clk = "rx_mii";
> + break;
> + default:
> + dev_err(&pdev->dev, "Not supported phy interface mode: [%s]\n",
> + phy_modes(plat_dat->phy_interface));
> + return -EINVAL;
> + };
> +
> + gmac->intf_mode = plat_dat->phy_interface;
> +
> + /* DMA cache coherency settings */
> + if (of_dma_is_coherent(pdev->dev.of_node)) {
> + ret = s32_config_cache_coherency(pdev, plat_dat);
> + if (ret)
> + return ret;
> + }
> +
> + /* tx clock */
> + gmac->tx_clk = devm_clk_get(&pdev->dev, tx_clk);
> + if (IS_ERR(gmac->tx_clk)) {
> + dev_info(&pdev->dev, "tx clock not found\n");
> + gmac->tx_clk = NULL;
> + }
> +
> + /* rx clock */
> + gmac->rx_clk = devm_clk_get(&pdev->dev, rx_clk);
> + if (IS_ERR(gmac->rx_clk)) {
> + dev_info(&pdev->dev, "rx clock not found\n");
> + gmac->rx_clk = NULL;
> + }
> +
> + ret = s32_gmac_init(pdev, gmac);
> + if (ret)
> + return ret;
> +
> + /* core feature set */
> + plat_dat->has_gmac4 = true;
> + plat_dat->pmt = 1;
> +
> + plat_dat->init = s32_gmac_init;
> + plat_dat->exit = s32_gmac_exit;
> + plat_dat->fix_mac_speed = s32_fix_speed;
> +
> + /* safety feature config */
> + plat_dat->safety_feat_cfg = devm_kzalloc(
> + &pdev->dev, sizeof(*plat_dat->safety_feat_cfg), GFP_KERNEL);
> +
> + if (!plat_dat->safety_feat_cfg) {
> + dev_err(&pdev->dev, "allocate safety_feat_cfg failed\n");
> + goto err_gmac_exit;
> + }
> +
> + plat_dat->safety_feat_cfg->tsoee = 1;
> + plat_dat->safety_feat_cfg->mrxpee = 1;
> + plat_dat->safety_feat_cfg->mestee = 1;
> + plat_dat->safety_feat_cfg->mrxee = 1;
> + plat_dat->safety_feat_cfg->mtxee = 1;
> + plat_dat->safety_feat_cfg->epsi = 1;
> + plat_dat->safety_feat_cfg->edpp = 1;
> + plat_dat->safety_feat_cfg->prtyen = 1;
> + plat_dat->safety_feat_cfg->tmouten = 1;
> +
> + ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
> + if (ret)
> + goto err_gmac_exit;
> +
> + return 0;
> +
> +err_gmac_exit:
> + s32_gmac_exit(pdev, plat_dat->bsp_priv);
> + return ret;
> +}
> +
> +static const struct of_device_id s32_dwmac_match[] = {
> + { .compatible = "nxp,s32-dwmac" },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, s32_dwmac_match);
> +
> +static struct platform_driver s32_dwmac_driver = {
> + .probe = s32_dwmac_probe,
> + .remove_new = stmmac_pltfr_remove,
> + .driver = {
> + .name = "s32-dwmac",
> + .pm = &stmmac_pltfr_pm_ops,
> + .of_match_table = s32_dwmac_match,
> + },
> +};
> +module_platform_driver(s32_dwmac_driver);
> +
> +MODULE_AUTHOR("Jan Petrous <jan.petrous@xxxxxxx>");
> +MODULE_DESCRIPTION("NXP S32 GMAC driver");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> index 84d3a8551b03..edb559c36509 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
> @@ -556,6 +556,14 @@ static int dwmac4_enable_tbs(struct stmmac_priv
> *priv, void __iomem *ioaddr,
> return 0;
> }
>
> +static void dwmac4_set_axi4_cc(struct stmmac_priv *priv, void __iomem
> *ioaddr,
> + struct stmmac_axi4_ace_ctrl *acecfg)
> +{
> + writel(acecfg->tx_ar_reg, ioaddr + DMA_AXI4_TX_AR_ACE_CONTROL);
> + writel(acecfg->rx_aw_reg, ioaddr + DMA_AXI4_RX_AW_ACE_CONTROL);
> + writel(acecfg->txrx_awar_reg, ioaddr +
> DMA_AXI4_TXRX_AWAR_ACE_CONTROL);
> +}
> +
> const struct stmmac_dma_ops dwmac4_dma_ops = {
> .reset = dwmac4_dma_reset,
> .init = dwmac4_dma_init,
> @@ -608,6 +616,7 @@ const struct stmmac_dma_ops dwmac410_dma_ops
> = {
> .set_tx_ring_len = dwmac4_set_tx_ring_len,
> .set_rx_tail_ptr = dwmac4_set_rx_tail_ptr,
> .set_tx_tail_ptr = dwmac4_set_tx_tail_ptr,
> + .set_axi4_cc = dwmac4_set_axi4_cc,
> .enable_tso = dwmac4_enable_tso,
> .qmode = dwmac4_qmode,
> .set_bfsize = dwmac4_set_bfsize,
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
> b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
> index 358e7dcb6a9a..7195c643774f 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
> @@ -22,6 +22,9 @@
> #define DMA_DEBUG_STATUS_1 0x00001010
> #define DMA_DEBUG_STATUS_2 0x00001014
> #define DMA_AXI_BUS_MODE 0x00001028
> +#define DMA_AXI4_TX_AR_ACE_CONTROL 0x00001020
> +#define DMA_AXI4_RX_AW_ACE_CONTROL 0x00001024
> +#define DMA_AXI4_TXRX_AWAR_ACE_CONTROL 0x00001028
> #define DMA_TBS_CTRL 0x00001050
>
> /* DMA Bus Mode bitmap */
> diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> index 7be04b54738b..6ea2d8f562d0 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
> @@ -227,6 +227,9 @@ struct stmmac_dma_ops {
> u32 tail_ptr, u32 chan);
> void (*set_tx_tail_ptr)(struct stmmac_priv *priv, void __iomem *ioaddr,
> u32 tail_ptr, u32 chan);
> + /* Configure AXI4 cache coherency for Tx and Rx DMA channels */
> + void (*set_axi4_cc)(struct stmmac_priv *priv, void __iomem *ioaddr,
> + struct stmmac_axi4_ace_ctrl *acecfg);
> void (*enable_tso)(struct stmmac_priv *priv, void __iomem *ioaddr,
> bool en, u32 chan);
> void (*qmode)(struct stmmac_priv *priv, void __iomem *ioaddr,
> @@ -285,6 +288,8 @@ struct stmmac_dma_ops {
> stmmac_do_void_callback(__priv, dma, set_rx_tail_ptr, __priv, __args)
> #define stmmac_set_tx_tail_ptr(__priv, __args...) \
> stmmac_do_void_callback(__priv, dma, set_tx_tail_ptr, __priv, __args)
> +#define stmmac_set_axi4_cc(__priv, __args...) \
> + stmmac_do_void_callback(__priv, dma, set_axi4_cc, __priv, __args)
> #define stmmac_enable_tso(__priv, __args...) \
> stmmac_do_void_callback(__priv, dma, enable_tso, __priv, __args)
> #define stmmac_dma_qmode(__priv, __args...) \
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 7c6aef033a45..b7b4d7dd1149 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -324,6 +324,10 @@ static void stmmac_clk_csr_set(struct stmmac_priv
> *priv)
> priv->clk_csr = STMMAC_CSR_150_250M;
> else if ((clk_rate >= CSR_F_250M) && (clk_rate <= CSR_F_300M))
> priv->clk_csr = STMMAC_CSR_250_300M;
> + else if ((clk_rate >= CSR_F_300M) && (clk_rate < CSR_F_500M))
> + priv->clk_csr = STMMAC_CSR_300_500M;
> + else if ((clk_rate >= CSR_F_500M) && (clk_rate < CSR_F_800M))
> + priv->clk_csr = STMMAC_CSR_500_800M;
> }
>
> if (priv->plat->flags & STMMAC_FLAG_HAS_SUN8I) {
> @@ -3030,6 +3034,9 @@ static int stmmac_init_dma_engine(struct
> stmmac_priv *priv)
> if (priv->plat->axi)
> stmmac_axi(priv, priv->ioaddr, priv->plat->axi);
>
> + if (priv->plat->axi4_ace_ctrl)
> + stmmac_set_axi4_cc(priv, priv->ioaddr, priv->plat->axi4_ace_ctrl);
> +
> /* DMA CSR Channel configuration */
> for (chan = 0; chan < dma_csr_ch; chan++) {
> stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, chan);
> diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
> index dee5ad6e48c5..a69ac8b9274e 100644
> --- a/include/linux/stmmac.h
> +++ b/include/linux/stmmac.h
> @@ -34,6 +34,8 @@
> #define STMMAC_CSR_35_60M 0x3 /* MDC = clk_scr_i/26 */
> #define STMMAC_CSR_150_250M 0x4 /* MDC = clk_scr_i/102 */
> #define STMMAC_CSR_250_300M 0x5 /* MDC = clk_scr_i/122 */
> +#define STMMAC_CSR_300_500M 0x6 /* MDC = clk_scr_i/204 */
> +#define STMMAC_CSR_500_800M 0x7 /* MDC = clk_scr_i/324 */
>
> /* MTL algorithms identifiers */
> #define MTL_TX_ALGORITHM_WRR 0x0
> @@ -115,6 +117,12 @@ struct stmmac_axi {
> bool axi_rb;
> };
>
> +struct stmmac_axi4_ace_ctrl {
> + u32 tx_ar_reg;
> + u32 rx_aw_reg;
> + u32 txrx_awar_reg;
> +};
> +
> #define EST_GCL 1024
> struct stmmac_est {
> struct mutex lock;
> @@ -296,6 +304,7 @@ struct plat_stmmacenet_data {
> struct reset_control *stmmac_rst;
> struct reset_control *stmmac_ahb_rst;
> struct stmmac_axi *axi;
> + struct stmmac_axi4_ace_ctrl *axi4_ace_ctrl;
> int has_gmac4;
> int rss_en;
> int mac_port_sel_speed;
> --
> 2.25.1

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