| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * |
| * Copyright (C) 2009-2016 John Crispin <blogic@openwrt.org> |
| * Copyright (C) 2009-2016 Felix Fietkau <nbd@openwrt.org> |
| * Copyright (C) 2013-2016 Michael Lee <igvtee@gmail.com> |
| */ |
| |
| #include <linux/of_device.h> |
| #include <linux/of_mdio.h> |
| #include <linux/of_net.h> |
| #include <linux/mfd/syscon.h> |
| #include <linux/regmap.h> |
| #include <linux/clk.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/if_vlan.h> |
| #include <linux/reset.h> |
| #include <linux/tcp.h> |
| #include <linux/interrupt.h> |
| #include <linux/pinctrl/devinfo.h> |
| #include <linux/phylink.h> |
| #include <linux/jhash.h> |
| #include <net/dsa.h> |
| |
| #include "mtk_eth_soc.h" |
| |
| static int mtk_msg_level = -1; |
| module_param_named(msg_level, mtk_msg_level, int, 0); |
| MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)"); |
| |
| #define MTK_ETHTOOL_STAT(x) { #x, \ |
| offsetof(struct mtk_hw_stats, x) / sizeof(u64) } |
| |
| /* strings used by ethtool */ |
| static const struct mtk_ethtool_stats { |
| char str[ETH_GSTRING_LEN]; |
| u32 offset; |
| } mtk_ethtool_stats[] = { |
| MTK_ETHTOOL_STAT(tx_bytes), |
| MTK_ETHTOOL_STAT(tx_packets), |
| MTK_ETHTOOL_STAT(tx_skip), |
| MTK_ETHTOOL_STAT(tx_collisions), |
| MTK_ETHTOOL_STAT(rx_bytes), |
| MTK_ETHTOOL_STAT(rx_packets), |
| MTK_ETHTOOL_STAT(rx_overflow), |
| MTK_ETHTOOL_STAT(rx_fcs_errors), |
| MTK_ETHTOOL_STAT(rx_short_errors), |
| MTK_ETHTOOL_STAT(rx_long_errors), |
| MTK_ETHTOOL_STAT(rx_checksum_errors), |
| MTK_ETHTOOL_STAT(rx_flow_control_packets), |
| }; |
| |
| static const char * const mtk_clks_source_name[] = { |
| "ethif", "sgmiitop", "esw", "gp0", "gp1", "gp2", "fe", "trgpll", |
| "sgmii_tx250m", "sgmii_rx250m", "sgmii_cdr_ref", "sgmii_cdr_fb", |
| "sgmii2_tx250m", "sgmii2_rx250m", "sgmii2_cdr_ref", "sgmii2_cdr_fb", |
| "sgmii_ck", "eth2pll", |
| }; |
| |
| void mtk_w32(struct mtk_eth *eth, u32 val, unsigned reg) |
| { |
| __raw_writel(val, eth->base + reg); |
| } |
| |
| u32 mtk_r32(struct mtk_eth *eth, unsigned reg) |
| { |
| return __raw_readl(eth->base + reg); |
| } |
| |
| static u32 mtk_m32(struct mtk_eth *eth, u32 mask, u32 set, unsigned reg) |
| { |
| u32 val; |
| |
| val = mtk_r32(eth, reg); |
| val &= ~mask; |
| val |= set; |
| mtk_w32(eth, val, reg); |
| return reg; |
| } |
| |
| static int mtk_mdio_busy_wait(struct mtk_eth *eth) |
| { |
| unsigned long t_start = jiffies; |
| |
| while (1) { |
| if (!(mtk_r32(eth, MTK_PHY_IAC) & PHY_IAC_ACCESS)) |
| return 0; |
| if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT)) |
| break; |
| cond_resched(); |
| } |
| |
| dev_err(eth->dev, "mdio: MDIO timeout\n"); |
| return -1; |
| } |
| |
| static u32 _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, |
| u32 phy_register, u32 write_data) |
| { |
| if (mtk_mdio_busy_wait(eth)) |
| return -1; |
| |
| write_data &= 0xffff; |
| |
| mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE | |
| (phy_register << PHY_IAC_REG_SHIFT) | |
| (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data, |
| MTK_PHY_IAC); |
| |
| if (mtk_mdio_busy_wait(eth)) |
| return -1; |
| |
| return 0; |
| } |
| |
| static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg) |
| { |
| u32 d; |
| |
| if (mtk_mdio_busy_wait(eth)) |
| return 0xffff; |
| |
| mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ | |
| (phy_reg << PHY_IAC_REG_SHIFT) | |
| (phy_addr << PHY_IAC_ADDR_SHIFT), |
| MTK_PHY_IAC); |
| |
| if (mtk_mdio_busy_wait(eth)) |
| return 0xffff; |
| |
| d = mtk_r32(eth, MTK_PHY_IAC) & 0xffff; |
| |
| return d; |
| } |
| |
| static int mtk_mdio_write(struct mii_bus *bus, int phy_addr, |
| int phy_reg, u16 val) |
| { |
| struct mtk_eth *eth = bus->priv; |
| |
| return _mtk_mdio_write(eth, phy_addr, phy_reg, val); |
| } |
| |
| static int mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg) |
| { |
| struct mtk_eth *eth = bus->priv; |
| |
| return _mtk_mdio_read(eth, phy_addr, phy_reg); |
| } |
| |
| static int mt7621_gmac0_rgmii_adjust(struct mtk_eth *eth, |
| phy_interface_t interface) |
| { |
| u32 val; |
| |
| /* Check DDR memory type. |
| * Currently TRGMII mode with DDR2 memory is not supported. |
| */ |
| regmap_read(eth->ethsys, ETHSYS_SYSCFG, &val); |
| if (interface == PHY_INTERFACE_MODE_TRGMII && |
| val & SYSCFG_DRAM_TYPE_DDR2) { |
| dev_err(eth->dev, |
| "TRGMII mode with DDR2 memory is not supported!\n"); |
| return -EOPNOTSUPP; |
| } |
| |
| val = (interface == PHY_INTERFACE_MODE_TRGMII) ? |
| ETHSYS_TRGMII_MT7621_DDR_PLL : 0; |
| |
| regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0, |
| ETHSYS_TRGMII_MT7621_MASK, val); |
| |
| return 0; |
| } |
| |
| static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth, |
| phy_interface_t interface, int speed) |
| { |
| u32 val; |
| int ret; |
| |
| if (interface == PHY_INTERFACE_MODE_TRGMII) { |
| mtk_w32(eth, TRGMII_MODE, INTF_MODE); |
| val = 500000000; |
| ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val); |
| if (ret) |
| dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret); |
| return; |
| } |
| |
| val = (speed == SPEED_1000) ? |
| INTF_MODE_RGMII_1000 : INTF_MODE_RGMII_10_100; |
| mtk_w32(eth, val, INTF_MODE); |
| |
| regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0, |
| ETHSYS_TRGMII_CLK_SEL362_5, |
| ETHSYS_TRGMII_CLK_SEL362_5); |
| |
| val = (speed == SPEED_1000) ? 250000000 : 500000000; |
| ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], val); |
| if (ret) |
| dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret); |
| |
| val = (speed == SPEED_1000) ? |
| RCK_CTRL_RGMII_1000 : RCK_CTRL_RGMII_10_100; |
| mtk_w32(eth, val, TRGMII_RCK_CTRL); |
| |
| val = (speed == SPEED_1000) ? |
| TCK_CTRL_RGMII_1000 : TCK_CTRL_RGMII_10_100; |
| mtk_w32(eth, val, TRGMII_TCK_CTRL); |
| } |
| |
| static void mtk_mac_config(struct phylink_config *config, unsigned int mode, |
| const struct phylink_link_state *state) |
| { |
| struct mtk_mac *mac = container_of(config, struct mtk_mac, |
| phylink_config); |
| struct mtk_eth *eth = mac->hw; |
| u32 mcr_cur, mcr_new, sid, i; |
| int val, ge_mode, err; |
| |
| /* MT76x8 has no hardware settings between for the MAC */ |
| if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628) && |
| mac->interface != state->interface) { |
| /* Setup soc pin functions */ |
| switch (state->interface) { |
| case PHY_INTERFACE_MODE_TRGMII: |
| if (mac->id) |
| goto err_phy; |
| if (!MTK_HAS_CAPS(mac->hw->soc->caps, |
| MTK_GMAC1_TRGMII)) |
| goto err_phy; |
| fallthrough; |
| case PHY_INTERFACE_MODE_RGMII_TXID: |
| case PHY_INTERFACE_MODE_RGMII_RXID: |
| case PHY_INTERFACE_MODE_RGMII_ID: |
| case PHY_INTERFACE_MODE_RGMII: |
| case PHY_INTERFACE_MODE_MII: |
| case PHY_INTERFACE_MODE_REVMII: |
| case PHY_INTERFACE_MODE_RMII: |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_RGMII)) { |
| err = mtk_gmac_rgmii_path_setup(eth, mac->id); |
| if (err) |
| goto init_err; |
| } |
| break; |
| case PHY_INTERFACE_MODE_1000BASEX: |
| case PHY_INTERFACE_MODE_2500BASEX: |
| case PHY_INTERFACE_MODE_SGMII: |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) { |
| err = mtk_gmac_sgmii_path_setup(eth, mac->id); |
| if (err) |
| goto init_err; |
| } |
| break; |
| case PHY_INTERFACE_MODE_GMII: |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_GEPHY)) { |
| err = mtk_gmac_gephy_path_setup(eth, mac->id); |
| if (err) |
| goto init_err; |
| } |
| break; |
| default: |
| goto err_phy; |
| } |
| |
| /* Setup clock for 1st gmac */ |
| if (!mac->id && state->interface != PHY_INTERFACE_MODE_SGMII && |
| !phy_interface_mode_is_8023z(state->interface) && |
| MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GMAC1_TRGMII)) { |
| if (MTK_HAS_CAPS(mac->hw->soc->caps, |
| MTK_TRGMII_MT7621_CLK)) { |
| if (mt7621_gmac0_rgmii_adjust(mac->hw, |
| state->interface)) |
| goto err_phy; |
| } else { |
| mtk_gmac0_rgmii_adjust(mac->hw, |
| state->interface, |
| state->speed); |
| |
| /* mt7623_pad_clk_setup */ |
| for (i = 0 ; i < NUM_TRGMII_CTRL; i++) |
| mtk_w32(mac->hw, |
| TD_DM_DRVP(8) | TD_DM_DRVN(8), |
| TRGMII_TD_ODT(i)); |
| |
| /* Assert/release MT7623 RXC reset */ |
| mtk_m32(mac->hw, 0, RXC_RST | RXC_DQSISEL, |
| TRGMII_RCK_CTRL); |
| mtk_m32(mac->hw, RXC_RST, 0, TRGMII_RCK_CTRL); |
| } |
| } |
| |
| ge_mode = 0; |
| switch (state->interface) { |
| case PHY_INTERFACE_MODE_MII: |
| case PHY_INTERFACE_MODE_GMII: |
| ge_mode = 1; |
| break; |
| case PHY_INTERFACE_MODE_REVMII: |
| ge_mode = 2; |
| break; |
| case PHY_INTERFACE_MODE_RMII: |
| if (mac->id) |
| goto err_phy; |
| ge_mode = 3; |
| break; |
| default: |
| break; |
| } |
| |
| /* put the gmac into the right mode */ |
| regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); |
| val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, mac->id); |
| val |= SYSCFG0_GE_MODE(ge_mode, mac->id); |
| regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); |
| |
| mac->interface = state->interface; |
| } |
| |
| /* SGMII */ |
| if (state->interface == PHY_INTERFACE_MODE_SGMII || |
| phy_interface_mode_is_8023z(state->interface)) { |
| /* The path GMAC to SGMII will be enabled once the SGMIISYS is |
| * being setup done. |
| */ |
| regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); |
| |
| regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0, |
| SYSCFG0_SGMII_MASK, |
| ~(u32)SYSCFG0_SGMII_MASK); |
| |
| /* Decide how GMAC and SGMIISYS be mapped */ |
| sid = (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_SGMII)) ? |
| 0 : mac->id; |
| |
| /* Setup SGMIISYS with the determined property */ |
| if (state->interface != PHY_INTERFACE_MODE_SGMII) |
| err = mtk_sgmii_setup_mode_force(eth->sgmii, sid, |
| state); |
| else if (phylink_autoneg_inband(mode)) |
| err = mtk_sgmii_setup_mode_an(eth->sgmii, sid); |
| |
| if (err) |
| goto init_err; |
| |
| regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0, |
| SYSCFG0_SGMII_MASK, val); |
| } else if (phylink_autoneg_inband(mode)) { |
| dev_err(eth->dev, |
| "In-band mode not supported in non SGMII mode!\n"); |
| return; |
| } |
| |
| /* Setup gmac */ |
| mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); |
| mcr_new = mcr_cur; |
| mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE | |
| MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK; |
| |
| /* Only update control register when needed! */ |
| if (mcr_new != mcr_cur) |
| mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id)); |
| |
| return; |
| |
| err_phy: |
| dev_err(eth->dev, "%s: GMAC%d mode %s not supported!\n", __func__, |
| mac->id, phy_modes(state->interface)); |
| return; |
| |
| init_err: |
| dev_err(eth->dev, "%s: GMAC%d mode %s err: %d!\n", __func__, |
| mac->id, phy_modes(state->interface), err); |
| } |
| |
| static void mtk_mac_pcs_get_state(struct phylink_config *config, |
| struct phylink_link_state *state) |
| { |
| struct mtk_mac *mac = container_of(config, struct mtk_mac, |
| phylink_config); |
| u32 pmsr = mtk_r32(mac->hw, MTK_MAC_MSR(mac->id)); |
| |
| state->link = (pmsr & MAC_MSR_LINK); |
| state->duplex = (pmsr & MAC_MSR_DPX) >> 1; |
| |
| switch (pmsr & (MAC_MSR_SPEED_1000 | MAC_MSR_SPEED_100)) { |
| case 0: |
| state->speed = SPEED_10; |
| break; |
| case MAC_MSR_SPEED_100: |
| state->speed = SPEED_100; |
| break; |
| case MAC_MSR_SPEED_1000: |
| state->speed = SPEED_1000; |
| break; |
| default: |
| state->speed = SPEED_UNKNOWN; |
| break; |
| } |
| |
| state->pause &= (MLO_PAUSE_RX | MLO_PAUSE_TX); |
| if (pmsr & MAC_MSR_RX_FC) |
| state->pause |= MLO_PAUSE_RX; |
| if (pmsr & MAC_MSR_TX_FC) |
| state->pause |= MLO_PAUSE_TX; |
| } |
| |
| static void mtk_mac_an_restart(struct phylink_config *config) |
| { |
| struct mtk_mac *mac = container_of(config, struct mtk_mac, |
| phylink_config); |
| |
| mtk_sgmii_restart_an(mac->hw, mac->id); |
| } |
| |
| static void mtk_mac_link_down(struct phylink_config *config, unsigned int mode, |
| phy_interface_t interface) |
| { |
| struct mtk_mac *mac = container_of(config, struct mtk_mac, |
| phylink_config); |
| u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); |
| |
| mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN); |
| mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id)); |
| } |
| |
| static void mtk_mac_link_up(struct phylink_config *config, |
| struct phy_device *phy, |
| unsigned int mode, phy_interface_t interface, |
| int speed, int duplex, bool tx_pause, bool rx_pause) |
| { |
| struct mtk_mac *mac = container_of(config, struct mtk_mac, |
| phylink_config); |
| u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); |
| |
| mcr &= ~(MAC_MCR_SPEED_100 | MAC_MCR_SPEED_1000 | |
| MAC_MCR_FORCE_DPX | MAC_MCR_FORCE_TX_FC | |
| MAC_MCR_FORCE_RX_FC); |
| |
| /* Configure speed */ |
| switch (speed) { |
| case SPEED_2500: |
| case SPEED_1000: |
| mcr |= MAC_MCR_SPEED_1000; |
| break; |
| case SPEED_100: |
| mcr |= MAC_MCR_SPEED_100; |
| break; |
| } |
| |
| /* Configure duplex */ |
| if (duplex == DUPLEX_FULL) |
| mcr |= MAC_MCR_FORCE_DPX; |
| |
| /* Configure pause modes - phylink will avoid these for half duplex */ |
| if (tx_pause) |
| mcr |= MAC_MCR_FORCE_TX_FC; |
| if (rx_pause) |
| mcr |= MAC_MCR_FORCE_RX_FC; |
| |
| mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN; |
| mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id)); |
| } |
| |
| static void mtk_validate(struct phylink_config *config, |
| unsigned long *supported, |
| struct phylink_link_state *state) |
| { |
| struct mtk_mac *mac = container_of(config, struct mtk_mac, |
| phylink_config); |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; |
| |
| if (state->interface != PHY_INTERFACE_MODE_NA && |
| state->interface != PHY_INTERFACE_MODE_MII && |
| state->interface != PHY_INTERFACE_MODE_GMII && |
| !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_RGMII) && |
| phy_interface_mode_is_rgmii(state->interface)) && |
| !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_TRGMII) && |
| !mac->id && state->interface == PHY_INTERFACE_MODE_TRGMII) && |
| !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_SGMII) && |
| (state->interface == PHY_INTERFACE_MODE_SGMII || |
| phy_interface_mode_is_8023z(state->interface)))) { |
| linkmode_zero(supported); |
| return; |
| } |
| |
| phylink_set_port_modes(mask); |
| phylink_set(mask, Autoneg); |
| |
| switch (state->interface) { |
| case PHY_INTERFACE_MODE_TRGMII: |
| phylink_set(mask, 1000baseT_Full); |
| break; |
| case PHY_INTERFACE_MODE_1000BASEX: |
| case PHY_INTERFACE_MODE_2500BASEX: |
| phylink_set(mask, 1000baseX_Full); |
| phylink_set(mask, 2500baseX_Full); |
| break; |
| case PHY_INTERFACE_MODE_GMII: |
| case PHY_INTERFACE_MODE_RGMII: |
| case PHY_INTERFACE_MODE_RGMII_ID: |
| case PHY_INTERFACE_MODE_RGMII_RXID: |
| case PHY_INTERFACE_MODE_RGMII_TXID: |
| phylink_set(mask, 1000baseT_Half); |
| fallthrough; |
| case PHY_INTERFACE_MODE_SGMII: |
| phylink_set(mask, 1000baseT_Full); |
| phylink_set(mask, 1000baseX_Full); |
| fallthrough; |
| case PHY_INTERFACE_MODE_MII: |
| case PHY_INTERFACE_MODE_RMII: |
| case PHY_INTERFACE_MODE_REVMII: |
| case PHY_INTERFACE_MODE_NA: |
| default: |
| phylink_set(mask, 10baseT_Half); |
| phylink_set(mask, 10baseT_Full); |
| phylink_set(mask, 100baseT_Half); |
| phylink_set(mask, 100baseT_Full); |
| break; |
| } |
| |
| if (state->interface == PHY_INTERFACE_MODE_NA) { |
| if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_SGMII)) { |
| phylink_set(mask, 1000baseT_Full); |
| phylink_set(mask, 1000baseX_Full); |
| phylink_set(mask, 2500baseX_Full); |
| } |
| if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_RGMII)) { |
| phylink_set(mask, 1000baseT_Full); |
| phylink_set(mask, 1000baseT_Half); |
| phylink_set(mask, 1000baseX_Full); |
| } |
| if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GEPHY)) { |
| phylink_set(mask, 1000baseT_Full); |
| phylink_set(mask, 1000baseT_Half); |
| } |
| } |
| |
| phylink_set(mask, Pause); |
| phylink_set(mask, Asym_Pause); |
| |
| linkmode_and(supported, supported, mask); |
| linkmode_and(state->advertising, state->advertising, mask); |
| |
| /* We can only operate at 2500BaseX or 1000BaseX. If requested |
| * to advertise both, only report advertising at 2500BaseX. |
| */ |
| phylink_helper_basex_speed(state); |
| } |
| |
| static const struct phylink_mac_ops mtk_phylink_ops = { |
| .validate = mtk_validate, |
| .mac_pcs_get_state = mtk_mac_pcs_get_state, |
| .mac_an_restart = mtk_mac_an_restart, |
| .mac_config = mtk_mac_config, |
| .mac_link_down = mtk_mac_link_down, |
| .mac_link_up = mtk_mac_link_up, |
| }; |
| |
| static int mtk_mdio_init(struct mtk_eth *eth) |
| { |
| struct device_node *mii_np; |
| int ret; |
| |
| mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus"); |
| if (!mii_np) { |
| dev_err(eth->dev, "no %s child node found", "mdio-bus"); |
| return -ENODEV; |
| } |
| |
| if (!of_device_is_available(mii_np)) { |
| ret = -ENODEV; |
| goto err_put_node; |
| } |
| |
| eth->mii_bus = devm_mdiobus_alloc(eth->dev); |
| if (!eth->mii_bus) { |
| ret = -ENOMEM; |
| goto err_put_node; |
| } |
| |
| eth->mii_bus->name = "mdio"; |
| eth->mii_bus->read = mtk_mdio_read; |
| eth->mii_bus->write = mtk_mdio_write; |
| eth->mii_bus->priv = eth; |
| eth->mii_bus->parent = eth->dev; |
| |
| snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%pOFn", mii_np); |
| ret = of_mdiobus_register(eth->mii_bus, mii_np); |
| |
| err_put_node: |
| of_node_put(mii_np); |
| return ret; |
| } |
| |
| static void mtk_mdio_cleanup(struct mtk_eth *eth) |
| { |
| if (!eth->mii_bus) |
| return; |
| |
| mdiobus_unregister(eth->mii_bus); |
| } |
| |
| static inline void mtk_tx_irq_disable(struct mtk_eth *eth, u32 mask) |
| { |
| unsigned long flags; |
| u32 val; |
| |
| spin_lock_irqsave(ð->tx_irq_lock, flags); |
| val = mtk_r32(eth, eth->tx_int_mask_reg); |
| mtk_w32(eth, val & ~mask, eth->tx_int_mask_reg); |
| spin_unlock_irqrestore(ð->tx_irq_lock, flags); |
| } |
| |
| static inline void mtk_tx_irq_enable(struct mtk_eth *eth, u32 mask) |
| { |
| unsigned long flags; |
| u32 val; |
| |
| spin_lock_irqsave(ð->tx_irq_lock, flags); |
| val = mtk_r32(eth, eth->tx_int_mask_reg); |
| mtk_w32(eth, val | mask, eth->tx_int_mask_reg); |
| spin_unlock_irqrestore(ð->tx_irq_lock, flags); |
| } |
| |
| static inline void mtk_rx_irq_disable(struct mtk_eth *eth, u32 mask) |
| { |
| unsigned long flags; |
| u32 val; |
| |
| spin_lock_irqsave(ð->rx_irq_lock, flags); |
| val = mtk_r32(eth, MTK_PDMA_INT_MASK); |
| mtk_w32(eth, val & ~mask, MTK_PDMA_INT_MASK); |
| spin_unlock_irqrestore(ð->rx_irq_lock, flags); |
| } |
| |
| static inline void mtk_rx_irq_enable(struct mtk_eth *eth, u32 mask) |
| { |
| unsigned long flags; |
| u32 val; |
| |
| spin_lock_irqsave(ð->rx_irq_lock, flags); |
| val = mtk_r32(eth, MTK_PDMA_INT_MASK); |
| mtk_w32(eth, val | mask, MTK_PDMA_INT_MASK); |
| spin_unlock_irqrestore(ð->rx_irq_lock, flags); |
| } |
| |
| static int mtk_set_mac_address(struct net_device *dev, void *p) |
| { |
| int ret = eth_mac_addr(dev, p); |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| const char *macaddr = dev->dev_addr; |
| |
| if (ret) |
| return ret; |
| |
| if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) |
| return -EBUSY; |
| |
| spin_lock_bh(&mac->hw->page_lock); |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { |
| mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1], |
| MT7628_SDM_MAC_ADRH); |
| mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) | |
| (macaddr[4] << 8) | macaddr[5], |
| MT7628_SDM_MAC_ADRL); |
| } else { |
| mtk_w32(mac->hw, (macaddr[0] << 8) | macaddr[1], |
| MTK_GDMA_MAC_ADRH(mac->id)); |
| mtk_w32(mac->hw, (macaddr[2] << 24) | (macaddr[3] << 16) | |
| (macaddr[4] << 8) | macaddr[5], |
| MTK_GDMA_MAC_ADRL(mac->id)); |
| } |
| spin_unlock_bh(&mac->hw->page_lock); |
| |
| return 0; |
| } |
| |
| void mtk_stats_update_mac(struct mtk_mac *mac) |
| { |
| struct mtk_hw_stats *hw_stats = mac->hw_stats; |
| struct mtk_eth *eth = mac->hw; |
| |
| u64_stats_update_begin(&hw_stats->syncp); |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { |
| hw_stats->tx_packets += mtk_r32(mac->hw, MT7628_SDM_TPCNT); |
| hw_stats->tx_bytes += mtk_r32(mac->hw, MT7628_SDM_TBCNT); |
| hw_stats->rx_packets += mtk_r32(mac->hw, MT7628_SDM_RPCNT); |
| hw_stats->rx_bytes += mtk_r32(mac->hw, MT7628_SDM_RBCNT); |
| hw_stats->rx_checksum_errors += |
| mtk_r32(mac->hw, MT7628_SDM_CS_ERR); |
| } else { |
| unsigned int offs = hw_stats->reg_offset; |
| u64 stats; |
| |
| hw_stats->rx_bytes += mtk_r32(mac->hw, |
| MTK_GDM1_RX_GBCNT_L + offs); |
| stats = mtk_r32(mac->hw, MTK_GDM1_RX_GBCNT_H + offs); |
| if (stats) |
| hw_stats->rx_bytes += (stats << 32); |
| hw_stats->rx_packets += |
| mtk_r32(mac->hw, MTK_GDM1_RX_GPCNT + offs); |
| hw_stats->rx_overflow += |
| mtk_r32(mac->hw, MTK_GDM1_RX_OERCNT + offs); |
| hw_stats->rx_fcs_errors += |
| mtk_r32(mac->hw, MTK_GDM1_RX_FERCNT + offs); |
| hw_stats->rx_short_errors += |
| mtk_r32(mac->hw, MTK_GDM1_RX_SERCNT + offs); |
| hw_stats->rx_long_errors += |
| mtk_r32(mac->hw, MTK_GDM1_RX_LENCNT + offs); |
| hw_stats->rx_checksum_errors += |
| mtk_r32(mac->hw, MTK_GDM1_RX_CERCNT + offs); |
| hw_stats->rx_flow_control_packets += |
| mtk_r32(mac->hw, MTK_GDM1_RX_FCCNT + offs); |
| hw_stats->tx_skip += |
| mtk_r32(mac->hw, MTK_GDM1_TX_SKIPCNT + offs); |
| hw_stats->tx_collisions += |
| mtk_r32(mac->hw, MTK_GDM1_TX_COLCNT + offs); |
| hw_stats->tx_bytes += |
| mtk_r32(mac->hw, MTK_GDM1_TX_GBCNT_L + offs); |
| stats = mtk_r32(mac->hw, MTK_GDM1_TX_GBCNT_H + offs); |
| if (stats) |
| hw_stats->tx_bytes += (stats << 32); |
| hw_stats->tx_packets += |
| mtk_r32(mac->hw, MTK_GDM1_TX_GPCNT + offs); |
| } |
| |
| u64_stats_update_end(&hw_stats->syncp); |
| } |
| |
| static void mtk_stats_update(struct mtk_eth *eth) |
| { |
| int i; |
| |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| if (!eth->mac[i] || !eth->mac[i]->hw_stats) |
| continue; |
| if (spin_trylock(ð->mac[i]->hw_stats->stats_lock)) { |
| mtk_stats_update_mac(eth->mac[i]); |
| spin_unlock(ð->mac[i]->hw_stats->stats_lock); |
| } |
| } |
| } |
| |
| static void mtk_get_stats64(struct net_device *dev, |
| struct rtnl_link_stats64 *storage) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_hw_stats *hw_stats = mac->hw_stats; |
| unsigned int start; |
| |
| if (netif_running(dev) && netif_device_present(dev)) { |
| if (spin_trylock_bh(&hw_stats->stats_lock)) { |
| mtk_stats_update_mac(mac); |
| spin_unlock_bh(&hw_stats->stats_lock); |
| } |
| } |
| |
| do { |
| start = u64_stats_fetch_begin_irq(&hw_stats->syncp); |
| storage->rx_packets = hw_stats->rx_packets; |
| storage->tx_packets = hw_stats->tx_packets; |
| storage->rx_bytes = hw_stats->rx_bytes; |
| storage->tx_bytes = hw_stats->tx_bytes; |
| storage->collisions = hw_stats->tx_collisions; |
| storage->rx_length_errors = hw_stats->rx_short_errors + |
| hw_stats->rx_long_errors; |
| storage->rx_over_errors = hw_stats->rx_overflow; |
| storage->rx_crc_errors = hw_stats->rx_fcs_errors; |
| storage->rx_errors = hw_stats->rx_checksum_errors; |
| storage->tx_aborted_errors = hw_stats->tx_skip; |
| } while (u64_stats_fetch_retry_irq(&hw_stats->syncp, start)); |
| |
| storage->tx_errors = dev->stats.tx_errors; |
| storage->rx_dropped = dev->stats.rx_dropped; |
| storage->tx_dropped = dev->stats.tx_dropped; |
| } |
| |
| static inline int mtk_max_frag_size(int mtu) |
| { |
| /* make sure buf_size will be at least MTK_MAX_RX_LENGTH */ |
| if (mtu + MTK_RX_ETH_HLEN < MTK_MAX_RX_LENGTH_2K) |
| mtu = MTK_MAX_RX_LENGTH_2K - MTK_RX_ETH_HLEN; |
| |
| return SKB_DATA_ALIGN(MTK_RX_HLEN + mtu) + |
| SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); |
| } |
| |
| static inline int mtk_max_buf_size(int frag_size) |
| { |
| int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN - |
| SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); |
| |
| WARN_ON(buf_size < MTK_MAX_RX_LENGTH_2K); |
| |
| return buf_size; |
| } |
| |
| static inline bool mtk_rx_get_desc(struct mtk_rx_dma *rxd, |
| struct mtk_rx_dma *dma_rxd) |
| { |
| rxd->rxd2 = READ_ONCE(dma_rxd->rxd2); |
| if (!(rxd->rxd2 & RX_DMA_DONE)) |
| return false; |
| |
| rxd->rxd1 = READ_ONCE(dma_rxd->rxd1); |
| rxd->rxd3 = READ_ONCE(dma_rxd->rxd3); |
| rxd->rxd4 = READ_ONCE(dma_rxd->rxd4); |
| |
| return true; |
| } |
| |
| /* the qdma core needs scratch memory to be setup */ |
| static int mtk_init_fq_dma(struct mtk_eth *eth) |
| { |
| dma_addr_t phy_ring_tail; |
| int cnt = MTK_DMA_SIZE; |
| dma_addr_t dma_addr; |
| int i; |
| |
| eth->scratch_ring = dma_alloc_coherent(eth->dev, |
| cnt * sizeof(struct mtk_tx_dma), |
| ð->phy_scratch_ring, |
| GFP_ATOMIC); |
| if (unlikely(!eth->scratch_ring)) |
| return -ENOMEM; |
| |
| eth->scratch_head = kcalloc(cnt, MTK_QDMA_PAGE_SIZE, |
| GFP_KERNEL); |
| if (unlikely(!eth->scratch_head)) |
| return -ENOMEM; |
| |
| dma_addr = dma_map_single(eth->dev, |
| eth->scratch_head, cnt * MTK_QDMA_PAGE_SIZE, |
| DMA_FROM_DEVICE); |
| if (unlikely(dma_mapping_error(eth->dev, dma_addr))) |
| return -ENOMEM; |
| |
| phy_ring_tail = eth->phy_scratch_ring + |
| (sizeof(struct mtk_tx_dma) * (cnt - 1)); |
| |
| for (i = 0; i < cnt; i++) { |
| eth->scratch_ring[i].txd1 = |
| (dma_addr + (i * MTK_QDMA_PAGE_SIZE)); |
| if (i < cnt - 1) |
| eth->scratch_ring[i].txd2 = (eth->phy_scratch_ring + |
| ((i + 1) * sizeof(struct mtk_tx_dma))); |
| eth->scratch_ring[i].txd3 = TX_DMA_SDL(MTK_QDMA_PAGE_SIZE); |
| } |
| |
| mtk_w32(eth, eth->phy_scratch_ring, MTK_QDMA_FQ_HEAD); |
| mtk_w32(eth, phy_ring_tail, MTK_QDMA_FQ_TAIL); |
| mtk_w32(eth, (cnt << 16) | cnt, MTK_QDMA_FQ_CNT); |
| mtk_w32(eth, MTK_QDMA_PAGE_SIZE << 16, MTK_QDMA_FQ_BLEN); |
| |
| return 0; |
| } |
| |
| static inline void *mtk_qdma_phys_to_virt(struct mtk_tx_ring *ring, u32 desc) |
| { |
| void *ret = ring->dma; |
| |
| return ret + (desc - ring->phys); |
| } |
| |
| static inline struct mtk_tx_buf *mtk_desc_to_tx_buf(struct mtk_tx_ring *ring, |
| struct mtk_tx_dma *txd) |
| { |
| int idx = txd - ring->dma; |
| |
| return &ring->buf[idx]; |
| } |
| |
| static struct mtk_tx_dma *qdma_to_pdma(struct mtk_tx_ring *ring, |
| struct mtk_tx_dma *dma) |
| { |
| return ring->dma_pdma - ring->dma + dma; |
| } |
| |
| static int txd_to_idx(struct mtk_tx_ring *ring, struct mtk_tx_dma *dma) |
| { |
| return ((void *)dma - (void *)ring->dma) / sizeof(*dma); |
| } |
| |
| static void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf, |
| bool napi) |
| { |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| if (tx_buf->flags & MTK_TX_FLAGS_SINGLE0) { |
| dma_unmap_single(eth->dev, |
| dma_unmap_addr(tx_buf, dma_addr0), |
| dma_unmap_len(tx_buf, dma_len0), |
| DMA_TO_DEVICE); |
| } else if (tx_buf->flags & MTK_TX_FLAGS_PAGE0) { |
| dma_unmap_page(eth->dev, |
| dma_unmap_addr(tx_buf, dma_addr0), |
| dma_unmap_len(tx_buf, dma_len0), |
| DMA_TO_DEVICE); |
| } |
| } else { |
| if (dma_unmap_len(tx_buf, dma_len0)) { |
| dma_unmap_page(eth->dev, |
| dma_unmap_addr(tx_buf, dma_addr0), |
| dma_unmap_len(tx_buf, dma_len0), |
| DMA_TO_DEVICE); |
| } |
| |
| if (dma_unmap_len(tx_buf, dma_len1)) { |
| dma_unmap_page(eth->dev, |
| dma_unmap_addr(tx_buf, dma_addr1), |
| dma_unmap_len(tx_buf, dma_len1), |
| DMA_TO_DEVICE); |
| } |
| } |
| |
| tx_buf->flags = 0; |
| if (tx_buf->skb && |
| (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC)) { |
| if (napi) |
| napi_consume_skb(tx_buf->skb, napi); |
| else |
| dev_kfree_skb_any(tx_buf->skb); |
| } |
| tx_buf->skb = NULL; |
| } |
| |
| static void setup_tx_buf(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf, |
| struct mtk_tx_dma *txd, dma_addr_t mapped_addr, |
| size_t size, int idx) |
| { |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); |
| dma_unmap_len_set(tx_buf, dma_len0, size); |
| } else { |
| if (idx & 1) { |
| txd->txd3 = mapped_addr; |
| txd->txd2 |= TX_DMA_PLEN1(size); |
| dma_unmap_addr_set(tx_buf, dma_addr1, mapped_addr); |
| dma_unmap_len_set(tx_buf, dma_len1, size); |
| } else { |
| tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC; |
| txd->txd1 = mapped_addr; |
| txd->txd2 = TX_DMA_PLEN0(size); |
| dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); |
| dma_unmap_len_set(tx_buf, dma_len0, size); |
| } |
| } |
| } |
| |
| static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev, |
| int tx_num, struct mtk_tx_ring *ring, bool gso) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| struct mtk_tx_dma *itxd, *txd; |
| struct mtk_tx_dma *itxd_pdma, *txd_pdma; |
| struct mtk_tx_buf *itx_buf, *tx_buf; |
| dma_addr_t mapped_addr; |
| unsigned int nr_frags; |
| int i, n_desc = 1; |
| u32 txd4 = 0, fport; |
| int k = 0; |
| |
| itxd = ring->next_free; |
| itxd_pdma = qdma_to_pdma(ring, itxd); |
| if (itxd == ring->last_free) |
| return -ENOMEM; |
| |
| /* set the forward port */ |
| fport = (mac->id + 1) << TX_DMA_FPORT_SHIFT; |
| txd4 |= fport; |
| |
| itx_buf = mtk_desc_to_tx_buf(ring, itxd); |
| memset(itx_buf, 0, sizeof(*itx_buf)); |
| |
| if (gso) |
| txd4 |= TX_DMA_TSO; |
| |
| /* TX Checksum offload */ |
| if (skb->ip_summed == CHECKSUM_PARTIAL) |
| txd4 |= TX_DMA_CHKSUM; |
| |
| /* VLAN header offload */ |
| if (skb_vlan_tag_present(skb)) |
| txd4 |= TX_DMA_INS_VLAN | skb_vlan_tag_get(skb); |
| |
| mapped_addr = dma_map_single(eth->dev, skb->data, |
| skb_headlen(skb), DMA_TO_DEVICE); |
| if (unlikely(dma_mapping_error(eth->dev, mapped_addr))) |
| return -ENOMEM; |
| |
| WRITE_ONCE(itxd->txd1, mapped_addr); |
| itx_buf->flags |= MTK_TX_FLAGS_SINGLE0; |
| itx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 : |
| MTK_TX_FLAGS_FPORT1; |
| setup_tx_buf(eth, itx_buf, itxd_pdma, mapped_addr, skb_headlen(skb), |
| k++); |
| |
| /* TX SG offload */ |
| txd = itxd; |
| txd_pdma = qdma_to_pdma(ring, txd); |
| nr_frags = skb_shinfo(skb)->nr_frags; |
| |
| for (i = 0; i < nr_frags; i++) { |
| skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| unsigned int offset = 0; |
| int frag_size = skb_frag_size(frag); |
| |
| while (frag_size) { |
| bool last_frag = false; |
| unsigned int frag_map_size; |
| bool new_desc = true; |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA) || |
| (i & 0x1)) { |
| txd = mtk_qdma_phys_to_virt(ring, txd->txd2); |
| txd_pdma = qdma_to_pdma(ring, txd); |
| if (txd == ring->last_free) |
| goto err_dma; |
| |
| n_desc++; |
| } else { |
| new_desc = false; |
| } |
| |
| |
| frag_map_size = min(frag_size, MTK_TX_DMA_BUF_LEN); |
| mapped_addr = skb_frag_dma_map(eth->dev, frag, offset, |
| frag_map_size, |
| DMA_TO_DEVICE); |
| if (unlikely(dma_mapping_error(eth->dev, mapped_addr))) |
| goto err_dma; |
| |
| if (i == nr_frags - 1 && |
| (frag_size - frag_map_size) == 0) |
| last_frag = true; |
| |
| WRITE_ONCE(txd->txd1, mapped_addr); |
| WRITE_ONCE(txd->txd3, (TX_DMA_SWC | |
| TX_DMA_PLEN0(frag_map_size) | |
| last_frag * TX_DMA_LS0)); |
| WRITE_ONCE(txd->txd4, fport); |
| |
| tx_buf = mtk_desc_to_tx_buf(ring, txd); |
| if (new_desc) |
| memset(tx_buf, 0, sizeof(*tx_buf)); |
| tx_buf->skb = (struct sk_buff *)MTK_DMA_DUMMY_DESC; |
| tx_buf->flags |= MTK_TX_FLAGS_PAGE0; |
| tx_buf->flags |= (!mac->id) ? MTK_TX_FLAGS_FPORT0 : |
| MTK_TX_FLAGS_FPORT1; |
| |
| setup_tx_buf(eth, tx_buf, txd_pdma, mapped_addr, |
| frag_map_size, k++); |
| |
| frag_size -= frag_map_size; |
| offset += frag_map_size; |
| } |
| } |
| |
| /* store skb to cleanup */ |
| itx_buf->skb = skb; |
| |
| WRITE_ONCE(itxd->txd4, txd4); |
| WRITE_ONCE(itxd->txd3, (TX_DMA_SWC | TX_DMA_PLEN0(skb_headlen(skb)) | |
| (!nr_frags * TX_DMA_LS0))); |
| if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| if (k & 0x1) |
| txd_pdma->txd2 |= TX_DMA_LS0; |
| else |
| txd_pdma->txd2 |= TX_DMA_LS1; |
| } |
| |
| netdev_sent_queue(dev, skb->len); |
| skb_tx_timestamp(skb); |
| |
| ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2); |
| atomic_sub(n_desc, &ring->free_count); |
| |
| /* make sure that all changes to the dma ring are flushed before we |
| * continue |
| */ |
| wmb(); |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) || |
| !netdev_xmit_more()) |
| mtk_w32(eth, txd->txd2, MTK_QTX_CTX_PTR); |
| } else { |
| int next_idx = NEXT_DESP_IDX(txd_to_idx(ring, txd), |
| ring->dma_size); |
| mtk_w32(eth, next_idx, MT7628_TX_CTX_IDX0); |
| } |
| |
| return 0; |
| |
| err_dma: |
| do { |
| tx_buf = mtk_desc_to_tx_buf(ring, itxd); |
| |
| /* unmap dma */ |
| mtk_tx_unmap(eth, tx_buf, false); |
| |
| itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; |
| if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) |
| itxd_pdma->txd2 = TX_DMA_DESP2_DEF; |
| |
| itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2); |
| itxd_pdma = qdma_to_pdma(ring, itxd); |
| } while (itxd != txd); |
| |
| return -ENOMEM; |
| } |
| |
| static inline int mtk_cal_txd_req(struct sk_buff *skb) |
| { |
| int i, nfrags; |
| skb_frag_t *frag; |
| |
| nfrags = 1; |
| if (skb_is_gso(skb)) { |
| for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| frag = &skb_shinfo(skb)->frags[i]; |
| nfrags += DIV_ROUND_UP(skb_frag_size(frag), |
| MTK_TX_DMA_BUF_LEN); |
| } |
| } else { |
| nfrags += skb_shinfo(skb)->nr_frags; |
| } |
| |
| return nfrags; |
| } |
| |
| static int mtk_queue_stopped(struct mtk_eth *eth) |
| { |
| int i; |
| |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| if (!eth->netdev[i]) |
| continue; |
| if (netif_queue_stopped(eth->netdev[i])) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static void mtk_wake_queue(struct mtk_eth *eth) |
| { |
| int i; |
| |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| if (!eth->netdev[i]) |
| continue; |
| netif_wake_queue(eth->netdev[i]); |
| } |
| } |
| |
| static netdev_tx_t mtk_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| struct mtk_tx_ring *ring = ð->tx_ring; |
| struct net_device_stats *stats = &dev->stats; |
| bool gso = false; |
| int tx_num; |
| |
| /* normally we can rely on the stack not calling this more than once, |
| * however we have 2 queues running on the same ring so we need to lock |
| * the ring access |
| */ |
| spin_lock(ð->page_lock); |
| |
| if (unlikely(test_bit(MTK_RESETTING, ð->state))) |
| goto drop; |
| |
| tx_num = mtk_cal_txd_req(skb); |
| if (unlikely(atomic_read(&ring->free_count) <= tx_num)) { |
| netif_stop_queue(dev); |
| netif_err(eth, tx_queued, dev, |
| "Tx Ring full when queue awake!\n"); |
| spin_unlock(ð->page_lock); |
| return NETDEV_TX_BUSY; |
| } |
| |
| /* TSO: fill MSS info in tcp checksum field */ |
| if (skb_is_gso(skb)) { |
| if (skb_cow_head(skb, 0)) { |
| netif_warn(eth, tx_err, dev, |
| "GSO expand head fail.\n"); |
| goto drop; |
| } |
| |
| if (skb_shinfo(skb)->gso_type & |
| (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) { |
| gso = true; |
| tcp_hdr(skb)->check = htons(skb_shinfo(skb)->gso_size); |
| } |
| } |
| |
| if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0) |
| goto drop; |
| |
| if (unlikely(atomic_read(&ring->free_count) <= ring->thresh)) |
| netif_stop_queue(dev); |
| |
| spin_unlock(ð->page_lock); |
| |
| return NETDEV_TX_OK; |
| |
| drop: |
| spin_unlock(ð->page_lock); |
| stats->tx_dropped++; |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| static struct mtk_rx_ring *mtk_get_rx_ring(struct mtk_eth *eth) |
| { |
| int i; |
| struct mtk_rx_ring *ring; |
| int idx; |
| |
| if (!eth->hwlro) |
| return ð->rx_ring[0]; |
| |
| for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) { |
| ring = ð->rx_ring[i]; |
| idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size); |
| if (ring->dma[idx].rxd2 & RX_DMA_DONE) { |
| ring->calc_idx_update = true; |
| return ring; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static void mtk_update_rx_cpu_idx(struct mtk_eth *eth) |
| { |
| struct mtk_rx_ring *ring; |
| int i; |
| |
| if (!eth->hwlro) { |
| ring = ð->rx_ring[0]; |
| mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg); |
| } else { |
| for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) { |
| ring = ð->rx_ring[i]; |
| if (ring->calc_idx_update) { |
| ring->calc_idx_update = false; |
| mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg); |
| } |
| } |
| } |
| } |
| |
| static int mtk_poll_rx(struct napi_struct *napi, int budget, |
| struct mtk_eth *eth) |
| { |
| struct dim_sample dim_sample = {}; |
| struct mtk_rx_ring *ring; |
| int idx; |
| struct sk_buff *skb; |
| u8 *data, *new_data; |
| struct mtk_rx_dma *rxd, trxd; |
| int done = 0, bytes = 0; |
| |
| while (done < budget) { |
| struct net_device *netdev; |
| unsigned int pktlen; |
| dma_addr_t dma_addr; |
| u32 hash; |
| int mac; |
| |
| ring = mtk_get_rx_ring(eth); |
| if (unlikely(!ring)) |
| goto rx_done; |
| |
| idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size); |
| rxd = &ring->dma[idx]; |
| data = ring->data[idx]; |
| |
| if (!mtk_rx_get_desc(&trxd, rxd)) |
| break; |
| |
| /* find out which mac the packet come from. values start at 1 */ |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628) || |
| (trxd.rxd4 & RX_DMA_SPECIAL_TAG)) |
| mac = 0; |
| else |
| mac = ((trxd.rxd4 >> RX_DMA_FPORT_SHIFT) & |
| RX_DMA_FPORT_MASK) - 1; |
| |
| if (unlikely(mac < 0 || mac >= MTK_MAC_COUNT || |
| !eth->netdev[mac])) |
| goto release_desc; |
| |
| netdev = eth->netdev[mac]; |
| |
| if (unlikely(test_bit(MTK_RESETTING, ð->state))) |
| goto release_desc; |
| |
| /* alloc new buffer */ |
| new_data = napi_alloc_frag(ring->frag_size); |
| if (unlikely(!new_data)) { |
| netdev->stats.rx_dropped++; |
| goto release_desc; |
| } |
| dma_addr = dma_map_single(eth->dev, |
| new_data + NET_SKB_PAD + |
| eth->ip_align, |
| ring->buf_size, |
| DMA_FROM_DEVICE); |
| if (unlikely(dma_mapping_error(eth->dev, dma_addr))) { |
| skb_free_frag(new_data); |
| netdev->stats.rx_dropped++; |
| goto release_desc; |
| } |
| |
| dma_unmap_single(eth->dev, trxd.rxd1, |
| ring->buf_size, DMA_FROM_DEVICE); |
| |
| /* receive data */ |
| skb = build_skb(data, ring->frag_size); |
| if (unlikely(!skb)) { |
| skb_free_frag(data); |
| netdev->stats.rx_dropped++; |
| goto skip_rx; |
| } |
| skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); |
| |
| pktlen = RX_DMA_GET_PLEN0(trxd.rxd2); |
| skb->dev = netdev; |
| skb_put(skb, pktlen); |
| if (trxd.rxd4 & eth->rx_dma_l4_valid) |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| else |
| skb_checksum_none_assert(skb); |
| skb->protocol = eth_type_trans(skb, netdev); |
| bytes += pktlen; |
| |
| hash = trxd.rxd4 & MTK_RXD4_FOE_ENTRY; |
| if (hash != MTK_RXD4_FOE_ENTRY) { |
| hash = jhash_1word(hash, 0); |
| skb_set_hash(skb, hash, PKT_HASH_TYPE_L4); |
| } |
| |
| if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX && |
| (trxd.rxd2 & RX_DMA_VTAG)) |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
| RX_DMA_VID(trxd.rxd3)); |
| skb_record_rx_queue(skb, 0); |
| napi_gro_receive(napi, skb); |
| |
| skip_rx: |
| ring->data[idx] = new_data; |
| rxd->rxd1 = (unsigned int)dma_addr; |
| |
| release_desc: |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) |
| rxd->rxd2 = RX_DMA_LSO; |
| else |
| rxd->rxd2 = RX_DMA_PLEN0(ring->buf_size); |
| |
| ring->calc_idx = idx; |
| |
| done++; |
| } |
| |
| rx_done: |
| if (done) { |
| /* make sure that all changes to the dma ring are flushed before |
| * we continue |
| */ |
| wmb(); |
| mtk_update_rx_cpu_idx(eth); |
| } |
| |
| eth->rx_packets += done; |
| eth->rx_bytes += bytes; |
| dim_update_sample(eth->rx_events, eth->rx_packets, eth->rx_bytes, |
| &dim_sample); |
| net_dim(ð->rx_dim, dim_sample); |
| |
| return done; |
| } |
| |
| static int mtk_poll_tx_qdma(struct mtk_eth *eth, int budget, |
| unsigned int *done, unsigned int *bytes) |
| { |
| struct mtk_tx_ring *ring = ð->tx_ring; |
| struct mtk_tx_dma *desc; |
| struct sk_buff *skb; |
| struct mtk_tx_buf *tx_buf; |
| u32 cpu, dma; |
| |
| cpu = ring->last_free_ptr; |
| dma = mtk_r32(eth, MTK_QTX_DRX_PTR); |
| |
| desc = mtk_qdma_phys_to_virt(ring, cpu); |
| |
| while ((cpu != dma) && budget) { |
| u32 next_cpu = desc->txd2; |
| int mac = 0; |
| |
| desc = mtk_qdma_phys_to_virt(ring, desc->txd2); |
| if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0) |
| break; |
| |
| tx_buf = mtk_desc_to_tx_buf(ring, desc); |
| if (tx_buf->flags & MTK_TX_FLAGS_FPORT1) |
| mac = 1; |
| |
| skb = tx_buf->skb; |
| if (!skb) |
| break; |
| |
| if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) { |
| bytes[mac] += skb->len; |
| done[mac]++; |
| budget--; |
| } |
| mtk_tx_unmap(eth, tx_buf, true); |
| |
| ring->last_free = desc; |
| atomic_inc(&ring->free_count); |
| |
| cpu = next_cpu; |
| } |
| |
| ring->last_free_ptr = cpu; |
| mtk_w32(eth, cpu, MTK_QTX_CRX_PTR); |
| |
| return budget; |
| } |
| |
| static int mtk_poll_tx_pdma(struct mtk_eth *eth, int budget, |
| unsigned int *done, unsigned int *bytes) |
| { |
| struct mtk_tx_ring *ring = ð->tx_ring; |
| struct mtk_tx_dma *desc; |
| struct sk_buff *skb; |
| struct mtk_tx_buf *tx_buf; |
| u32 cpu, dma; |
| |
| cpu = ring->cpu_idx; |
| dma = mtk_r32(eth, MT7628_TX_DTX_IDX0); |
| |
| while ((cpu != dma) && budget) { |
| tx_buf = &ring->buf[cpu]; |
| skb = tx_buf->skb; |
| if (!skb) |
| break; |
| |
| if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) { |
| bytes[0] += skb->len; |
| done[0]++; |
| budget--; |
| } |
| |
| mtk_tx_unmap(eth, tx_buf, true); |
| |
| desc = &ring->dma[cpu]; |
| ring->last_free = desc; |
| atomic_inc(&ring->free_count); |
| |
| cpu = NEXT_DESP_IDX(cpu, ring->dma_size); |
| } |
| |
| ring->cpu_idx = cpu; |
| |
| return budget; |
| } |
| |
| static int mtk_poll_tx(struct mtk_eth *eth, int budget) |
| { |
| struct mtk_tx_ring *ring = ð->tx_ring; |
| struct dim_sample dim_sample = {}; |
| unsigned int done[MTK_MAX_DEVS]; |
| unsigned int bytes[MTK_MAX_DEVS]; |
| int total = 0, i; |
| |
| memset(done, 0, sizeof(done)); |
| memset(bytes, 0, sizeof(bytes)); |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) |
| budget = mtk_poll_tx_qdma(eth, budget, done, bytes); |
| else |
| budget = mtk_poll_tx_pdma(eth, budget, done, bytes); |
| |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| if (!eth->netdev[i] || !done[i]) |
| continue; |
| netdev_completed_queue(eth->netdev[i], done[i], bytes[i]); |
| total += done[i]; |
| eth->tx_packets += done[i]; |
| eth->tx_bytes += bytes[i]; |
| } |
| |
| dim_update_sample(eth->tx_events, eth->tx_packets, eth->tx_bytes, |
| &dim_sample); |
| net_dim(ð->tx_dim, dim_sample); |
| |
| if (mtk_queue_stopped(eth) && |
| (atomic_read(&ring->free_count) > ring->thresh)) |
| mtk_wake_queue(eth); |
| |
| return total; |
| } |
| |
| static void mtk_handle_status_irq(struct mtk_eth *eth) |
| { |
| u32 status2 = mtk_r32(eth, MTK_INT_STATUS2); |
| |
| if (unlikely(status2 & (MTK_GDM1_AF | MTK_GDM2_AF))) { |
| mtk_stats_update(eth); |
| mtk_w32(eth, (MTK_GDM1_AF | MTK_GDM2_AF), |
| MTK_INT_STATUS2); |
| } |
| } |
| |
| static int mtk_napi_tx(struct napi_struct *napi, int budget) |
| { |
| struct mtk_eth *eth = container_of(napi, struct mtk_eth, tx_napi); |
| int tx_done = 0; |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) |
| mtk_handle_status_irq(eth); |
| mtk_w32(eth, MTK_TX_DONE_INT, eth->tx_int_status_reg); |
| tx_done = mtk_poll_tx(eth, budget); |
| |
| if (unlikely(netif_msg_intr(eth))) { |
| dev_info(eth->dev, |
| "done tx %d, intr 0x%08x/0x%x\n", tx_done, |
| mtk_r32(eth, eth->tx_int_status_reg), |
| mtk_r32(eth, eth->tx_int_mask_reg)); |
| } |
| |
| if (tx_done == budget) |
| return budget; |
| |
| if (mtk_r32(eth, eth->tx_int_status_reg) & MTK_TX_DONE_INT) |
| return budget; |
| |
| if (napi_complete_done(napi, tx_done)) |
| mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); |
| |
| return tx_done; |
| } |
| |
| static int mtk_napi_rx(struct napi_struct *napi, int budget) |
| { |
| struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi); |
| int rx_done_total = 0; |
| |
| mtk_handle_status_irq(eth); |
| |
| do { |
| int rx_done; |
| |
| mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_STATUS); |
| rx_done = mtk_poll_rx(napi, budget - rx_done_total, eth); |
| rx_done_total += rx_done; |
| |
| if (unlikely(netif_msg_intr(eth))) { |
| dev_info(eth->dev, |
| "done rx %d, intr 0x%08x/0x%x\n", rx_done, |
| mtk_r32(eth, MTK_PDMA_INT_STATUS), |
| mtk_r32(eth, MTK_PDMA_INT_MASK)); |
| } |
| |
| if (rx_done_total == budget) |
| return budget; |
| |
| } while (mtk_r32(eth, MTK_PDMA_INT_STATUS) & MTK_RX_DONE_INT); |
| |
| if (napi_complete_done(napi, rx_done_total)) |
| mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); |
| |
| return rx_done_total; |
| } |
| |
| static int mtk_tx_alloc(struct mtk_eth *eth) |
| { |
| struct mtk_tx_ring *ring = ð->tx_ring; |
| int i, sz = sizeof(*ring->dma); |
| |
| ring->buf = kcalloc(MTK_DMA_SIZE, sizeof(*ring->buf), |
| GFP_KERNEL); |
| if (!ring->buf) |
| goto no_tx_mem; |
| |
| ring->dma = dma_alloc_coherent(eth->dev, MTK_DMA_SIZE * sz, |
| &ring->phys, GFP_ATOMIC); |
| if (!ring->dma) |
| goto no_tx_mem; |
| |
| for (i = 0; i < MTK_DMA_SIZE; i++) { |
| int next = (i + 1) % MTK_DMA_SIZE; |
| u32 next_ptr = ring->phys + next * sz; |
| |
| ring->dma[i].txd2 = next_ptr; |
| ring->dma[i].txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; |
| } |
| |
| /* On MT7688 (PDMA only) this driver uses the ring->dma structs |
| * only as the framework. The real HW descriptors are the PDMA |
| * descriptors in ring->dma_pdma. |
| */ |
| if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| ring->dma_pdma = dma_alloc_coherent(eth->dev, MTK_DMA_SIZE * sz, |
| &ring->phys_pdma, |
| GFP_ATOMIC); |
| if (!ring->dma_pdma) |
| goto no_tx_mem; |
| |
| for (i = 0; i < MTK_DMA_SIZE; i++) { |
| ring->dma_pdma[i].txd2 = TX_DMA_DESP2_DEF; |
| ring->dma_pdma[i].txd4 = 0; |
| } |
| } |
| |
| ring->dma_size = MTK_DMA_SIZE; |
| atomic_set(&ring->free_count, MTK_DMA_SIZE - 2); |
| ring->next_free = &ring->dma[0]; |
| ring->last_free = &ring->dma[MTK_DMA_SIZE - 1]; |
| ring->last_free_ptr = (u32)(ring->phys + ((MTK_DMA_SIZE - 1) * sz)); |
| ring->thresh = MAX_SKB_FRAGS; |
| |
| /* make sure that all changes to the dma ring are flushed before we |
| * continue |
| */ |
| wmb(); |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| mtk_w32(eth, ring->phys, MTK_QTX_CTX_PTR); |
| mtk_w32(eth, ring->phys, MTK_QTX_DTX_PTR); |
| mtk_w32(eth, |
| ring->phys + ((MTK_DMA_SIZE - 1) * sz), |
| MTK_QTX_CRX_PTR); |
| mtk_w32(eth, ring->last_free_ptr, MTK_QTX_DRX_PTR); |
| mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES, |
| MTK_QTX_CFG(0)); |
| } else { |
| mtk_w32(eth, ring->phys_pdma, MT7628_TX_BASE_PTR0); |
| mtk_w32(eth, MTK_DMA_SIZE, MT7628_TX_MAX_CNT0); |
| mtk_w32(eth, 0, MT7628_TX_CTX_IDX0); |
| mtk_w32(eth, MT7628_PST_DTX_IDX0, MTK_PDMA_RST_IDX); |
| } |
| |
| return 0; |
| |
| no_tx_mem: |
| return -ENOMEM; |
| } |
| |
| static void mtk_tx_clean(struct mtk_eth *eth) |
| { |
| struct mtk_tx_ring *ring = ð->tx_ring; |
| int i; |
| |
| if (ring->buf) { |
| for (i = 0; i < MTK_DMA_SIZE; i++) |
| mtk_tx_unmap(eth, &ring->buf[i], false); |
| kfree(ring->buf); |
| ring->buf = NULL; |
| } |
| |
| if (ring->dma) { |
| dma_free_coherent(eth->dev, |
| MTK_DMA_SIZE * sizeof(*ring->dma), |
| ring->dma, |
| ring->phys); |
| ring->dma = NULL; |
| } |
| |
| if (ring->dma_pdma) { |
| dma_free_coherent(eth->dev, |
| MTK_DMA_SIZE * sizeof(*ring->dma_pdma), |
| ring->dma_pdma, |
| ring->phys_pdma); |
| ring->dma_pdma = NULL; |
| } |
| } |
| |
| static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag) |
| { |
| struct mtk_rx_ring *ring; |
| int rx_data_len, rx_dma_size; |
| int i; |
| u32 offset = 0; |
| |
| if (rx_flag == MTK_RX_FLAGS_QDMA) { |
| if (ring_no) |
| return -EINVAL; |
| ring = ð->rx_ring_qdma; |
| offset = 0x1000; |
| } else { |
| ring = ð->rx_ring[ring_no]; |
| } |
| |
| if (rx_flag == MTK_RX_FLAGS_HWLRO) { |
| rx_data_len = MTK_MAX_LRO_RX_LENGTH; |
| rx_dma_size = MTK_HW_LRO_DMA_SIZE; |
| } else { |
| rx_data_len = ETH_DATA_LEN; |
| rx_dma_size = MTK_DMA_SIZE; |
| } |
| |
| ring->frag_size = mtk_max_frag_size(rx_data_len); |
| ring->buf_size = mtk_max_buf_size(ring->frag_size); |
| ring->data = kcalloc(rx_dma_size, sizeof(*ring->data), |
| GFP_KERNEL); |
| if (!ring->data) |
| return -ENOMEM; |
| |
| for (i = 0; i < rx_dma_size; i++) { |
| ring->data[i] = netdev_alloc_frag(ring->frag_size); |
| if (!ring->data[i]) |
| return -ENOMEM; |
| } |
| |
| ring->dma = dma_alloc_coherent(eth->dev, |
| rx_dma_size * sizeof(*ring->dma), |
| &ring->phys, GFP_ATOMIC); |
| if (!ring->dma) |
| return -ENOMEM; |
| |
| for (i = 0; i < rx_dma_size; i++) { |
| dma_addr_t dma_addr = dma_map_single(eth->dev, |
| ring->data[i] + NET_SKB_PAD + eth->ip_align, |
| ring->buf_size, |
| DMA_FROM_DEVICE); |
| if (unlikely(dma_mapping_error(eth->dev, dma_addr))) |
| return -ENOMEM; |
| ring->dma[i].rxd1 = (unsigned int)dma_addr; |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) |
| ring->dma[i].rxd2 = RX_DMA_LSO; |
| else |
| ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size); |
| } |
| ring->dma_size = rx_dma_size; |
| ring->calc_idx_update = false; |
| ring->calc_idx = rx_dma_size - 1; |
| ring->crx_idx_reg = MTK_PRX_CRX_IDX_CFG(ring_no); |
| /* make sure that all changes to the dma ring are flushed before we |
| * continue |
| */ |
| wmb(); |
| |
| mtk_w32(eth, ring->phys, MTK_PRX_BASE_PTR_CFG(ring_no) + offset); |
| mtk_w32(eth, rx_dma_size, MTK_PRX_MAX_CNT_CFG(ring_no) + offset); |
| mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg + offset); |
| mtk_w32(eth, MTK_PST_DRX_IDX_CFG(ring_no), MTK_PDMA_RST_IDX + offset); |
| |
| return 0; |
| } |
| |
| static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring) |
| { |
| int i; |
| |
| if (ring->data && ring->dma) { |
| for (i = 0; i < ring->dma_size; i++) { |
| if (!ring->data[i]) |
| continue; |
| if (!ring->dma[i].rxd1) |
| continue; |
| dma_unmap_single(eth->dev, |
| ring->dma[i].rxd1, |
| ring->buf_size, |
| DMA_FROM_DEVICE); |
| skb_free_frag(ring->data[i]); |
| } |
| kfree(ring->data); |
| ring->data = NULL; |
| } |
| |
| if (ring->dma) { |
| dma_free_coherent(eth->dev, |
| ring->dma_size * sizeof(*ring->dma), |
| ring->dma, |
| ring->phys); |
| ring->dma = NULL; |
| } |
| } |
| |
| static int mtk_hwlro_rx_init(struct mtk_eth *eth) |
| { |
| int i; |
| u32 ring_ctrl_dw1 = 0, ring_ctrl_dw2 = 0, ring_ctrl_dw3 = 0; |
| u32 lro_ctrl_dw0 = 0, lro_ctrl_dw3 = 0; |
| |
| /* set LRO rings to auto-learn modes */ |
| ring_ctrl_dw2 |= MTK_RING_AUTO_LERAN_MODE; |
| |
| /* validate LRO ring */ |
| ring_ctrl_dw2 |= MTK_RING_VLD; |
| |
| /* set AGE timer (unit: 20us) */ |
| ring_ctrl_dw2 |= MTK_RING_AGE_TIME_H; |
| ring_ctrl_dw1 |= MTK_RING_AGE_TIME_L; |
| |
| /* set max AGG timer (unit: 20us) */ |
| ring_ctrl_dw2 |= MTK_RING_MAX_AGG_TIME; |
| |
| /* set max LRO AGG count */ |
| ring_ctrl_dw2 |= MTK_RING_MAX_AGG_CNT_L; |
| ring_ctrl_dw3 |= MTK_RING_MAX_AGG_CNT_H; |
| |
| for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) { |
| mtk_w32(eth, ring_ctrl_dw1, MTK_LRO_CTRL_DW1_CFG(i)); |
| mtk_w32(eth, ring_ctrl_dw2, MTK_LRO_CTRL_DW2_CFG(i)); |
| mtk_w32(eth, ring_ctrl_dw3, MTK_LRO_CTRL_DW3_CFG(i)); |
| } |
| |
| /* IPv4 checksum update enable */ |
| lro_ctrl_dw0 |= MTK_L3_CKS_UPD_EN; |
| |
| /* switch priority comparison to packet count mode */ |
| lro_ctrl_dw0 |= MTK_LRO_ALT_PKT_CNT_MODE; |
| |
| /* bandwidth threshold setting */ |
| mtk_w32(eth, MTK_HW_LRO_BW_THRE, MTK_PDMA_LRO_CTRL_DW2); |
| |
| /* auto-learn score delta setting */ |
| mtk_w32(eth, MTK_HW_LRO_REPLACE_DELTA, MTK_PDMA_LRO_ALT_SCORE_DELTA); |
| |
| /* set refresh timer for altering flows to 1 sec. (unit: 20us) */ |
| mtk_w32(eth, (MTK_HW_LRO_TIMER_UNIT << 16) | MTK_HW_LRO_REFRESH_TIME, |
| MTK_PDMA_LRO_ALT_REFRESH_TIMER); |
| |
| /* set HW LRO mode & the max aggregation count for rx packets */ |
| lro_ctrl_dw3 |= MTK_ADMA_MODE | (MTK_HW_LRO_MAX_AGG_CNT & 0xff); |
| |
| /* the minimal remaining room of SDL0 in RXD for lro aggregation */ |
| lro_ctrl_dw3 |= MTK_LRO_MIN_RXD_SDL; |
| |
| /* enable HW LRO */ |
| lro_ctrl_dw0 |= MTK_LRO_EN; |
| |
| mtk_w32(eth, lro_ctrl_dw3, MTK_PDMA_LRO_CTRL_DW3); |
| mtk_w32(eth, lro_ctrl_dw0, MTK_PDMA_LRO_CTRL_DW0); |
| |
| return 0; |
| } |
| |
| static void mtk_hwlro_rx_uninit(struct mtk_eth *eth) |
| { |
| int i; |
| u32 val; |
| |
| /* relinquish lro rings, flush aggregated packets */ |
| mtk_w32(eth, MTK_LRO_RING_RELINQUISH_REQ, MTK_PDMA_LRO_CTRL_DW0); |
| |
| /* wait for relinquishments done */ |
| for (i = 0; i < 10; i++) { |
| val = mtk_r32(eth, MTK_PDMA_LRO_CTRL_DW0); |
| if (val & MTK_LRO_RING_RELINQUISH_DONE) { |
| msleep(20); |
| continue; |
| } |
| break; |
| } |
| |
| /* invalidate lro rings */ |
| for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) |
| mtk_w32(eth, 0, MTK_LRO_CTRL_DW2_CFG(i)); |
| |
| /* disable HW LRO */ |
| mtk_w32(eth, 0, MTK_PDMA_LRO_CTRL_DW0); |
| } |
| |
| static void mtk_hwlro_val_ipaddr(struct mtk_eth *eth, int idx, __be32 ip) |
| { |
| u32 reg_val; |
| |
| reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx)); |
| |
| /* invalidate the IP setting */ |
| mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); |
| |
| mtk_w32(eth, ip, MTK_LRO_DIP_DW0_CFG(idx)); |
| |
| /* validate the IP setting */ |
| mtk_w32(eth, (reg_val | MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); |
| } |
| |
| static void mtk_hwlro_inval_ipaddr(struct mtk_eth *eth, int idx) |
| { |
| u32 reg_val; |
| |
| reg_val = mtk_r32(eth, MTK_LRO_CTRL_DW2_CFG(idx)); |
| |
| /* invalidate the IP setting */ |
| mtk_w32(eth, (reg_val & ~MTK_RING_MYIP_VLD), MTK_LRO_CTRL_DW2_CFG(idx)); |
| |
| mtk_w32(eth, 0, MTK_LRO_DIP_DW0_CFG(idx)); |
| } |
| |
| static int mtk_hwlro_get_ip_cnt(struct mtk_mac *mac) |
| { |
| int cnt = 0; |
| int i; |
| |
| for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { |
| if (mac->hwlro_ip[i]) |
| cnt++; |
| } |
| |
| return cnt; |
| } |
| |
| static int mtk_hwlro_add_ipaddr(struct net_device *dev, |
| struct ethtool_rxnfc *cmd) |
| { |
| struct ethtool_rx_flow_spec *fsp = |
| (struct ethtool_rx_flow_spec *)&cmd->fs; |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| int hwlro_idx; |
| |
| if ((fsp->flow_type != TCP_V4_FLOW) || |
| (!fsp->h_u.tcp_ip4_spec.ip4dst) || |
| (fsp->location > 1)) |
| return -EINVAL; |
| |
| mac->hwlro_ip[fsp->location] = htonl(fsp->h_u.tcp_ip4_spec.ip4dst); |
| hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location; |
| |
| mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac); |
| |
| mtk_hwlro_val_ipaddr(eth, hwlro_idx, mac->hwlro_ip[fsp->location]); |
| |
| return 0; |
| } |
| |
| static int mtk_hwlro_del_ipaddr(struct net_device *dev, |
| struct ethtool_rxnfc *cmd) |
| { |
| struct ethtool_rx_flow_spec *fsp = |
| (struct ethtool_rx_flow_spec *)&cmd->fs; |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| int hwlro_idx; |
| |
| if (fsp->location > 1) |
| return -EINVAL; |
| |
| mac->hwlro_ip[fsp->location] = 0; |
| hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + fsp->location; |
| |
| mac->hwlro_ip_cnt = mtk_hwlro_get_ip_cnt(mac); |
| |
| mtk_hwlro_inval_ipaddr(eth, hwlro_idx); |
| |
| return 0; |
| } |
| |
| static void mtk_hwlro_netdev_disable(struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| int i, hwlro_idx; |
| |
| for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { |
| mac->hwlro_ip[i] = 0; |
| hwlro_idx = (mac->id * MTK_MAX_LRO_IP_CNT) + i; |
| |
| mtk_hwlro_inval_ipaddr(eth, hwlro_idx); |
| } |
| |
| mac->hwlro_ip_cnt = 0; |
| } |
| |
| static int mtk_hwlro_get_fdir_entry(struct net_device *dev, |
| struct ethtool_rxnfc *cmd) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct ethtool_rx_flow_spec *fsp = |
| (struct ethtool_rx_flow_spec *)&cmd->fs; |
| |
| /* only tcp dst ipv4 is meaningful, others are meaningless */ |
| fsp->flow_type = TCP_V4_FLOW; |
| fsp->h_u.tcp_ip4_spec.ip4dst = ntohl(mac->hwlro_ip[fsp->location]); |
| fsp->m_u.tcp_ip4_spec.ip4dst = 0; |
| |
| fsp->h_u.tcp_ip4_spec.ip4src = 0; |
| fsp->m_u.tcp_ip4_spec.ip4src = 0xffffffff; |
| fsp->h_u.tcp_ip4_spec.psrc = 0; |
| fsp->m_u.tcp_ip4_spec.psrc = 0xffff; |
| fsp->h_u.tcp_ip4_spec.pdst = 0; |
| fsp->m_u.tcp_ip4_spec.pdst = 0xffff; |
| fsp->h_u.tcp_ip4_spec.tos = 0; |
| fsp->m_u.tcp_ip4_spec.tos = 0xff; |
| |
| return 0; |
| } |
| |
| static int mtk_hwlro_get_fdir_all(struct net_device *dev, |
| struct ethtool_rxnfc *cmd, |
| u32 *rule_locs) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| int cnt = 0; |
| int i; |
| |
| for (i = 0; i < MTK_MAX_LRO_IP_CNT; i++) { |
| if (mac->hwlro_ip[i]) { |
| rule_locs[cnt] = i; |
| cnt++; |
| } |
| } |
| |
| cmd->rule_cnt = cnt; |
| |
| return 0; |
| } |
| |
| static netdev_features_t mtk_fix_features(struct net_device *dev, |
| netdev_features_t features) |
| { |
| if (!(features & NETIF_F_LRO)) { |
| struct mtk_mac *mac = netdev_priv(dev); |
| int ip_cnt = mtk_hwlro_get_ip_cnt(mac); |
| |
| if (ip_cnt) { |
| netdev_info(dev, "RX flow is programmed, LRO should keep on\n"); |
| |
| features |= NETIF_F_LRO; |
| } |
| } |
| |
| return features; |
| } |
| |
| static int mtk_set_features(struct net_device *dev, netdev_features_t features) |
| { |
| int err = 0; |
| |
| if (!((dev->features ^ features) & NETIF_F_LRO)) |
| return 0; |
| |
| if (!(features & NETIF_F_LRO)) |
| mtk_hwlro_netdev_disable(dev); |
| |
| return err; |
| } |
| |
| /* wait for DMA to finish whatever it is doing before we start using it again */ |
| static int mtk_dma_busy_wait(struct mtk_eth *eth) |
| { |
| unsigned int reg; |
| int ret; |
| u32 val; |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) |
| reg = MTK_QDMA_GLO_CFG; |
| else |
| reg = MTK_PDMA_GLO_CFG; |
| |
| ret = readx_poll_timeout_atomic(__raw_readl, eth->base + reg, val, |
| !(val & (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY)), |
| 5, MTK_DMA_BUSY_TIMEOUT_US); |
| if (ret) |
| dev_err(eth->dev, "DMA init timeout\n"); |
| |
| return ret; |
| } |
| |
| static int mtk_dma_init(struct mtk_eth *eth) |
| { |
| int err; |
| u32 i; |
| |
| if (mtk_dma_busy_wait(eth)) |
| return -EBUSY; |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| /* QDMA needs scratch memory for internal reordering of the |
| * descriptors |
| */ |
| err = mtk_init_fq_dma(eth); |
| if (err) |
| return err; |
| } |
| |
| err = mtk_tx_alloc(eth); |
| if (err) |
| return err; |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_QDMA); |
| if (err) |
| return err; |
| } |
| |
| err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_NORMAL); |
| if (err) |
| return err; |
| |
| if (eth->hwlro) { |
| for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) { |
| err = mtk_rx_alloc(eth, i, MTK_RX_FLAGS_HWLRO); |
| if (err) |
| return err; |
| } |
| err = mtk_hwlro_rx_init(eth); |
| if (err) |
| return err; |
| } |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| /* Enable random early drop and set drop threshold |
| * automatically |
| */ |
| mtk_w32(eth, FC_THRES_DROP_MODE | FC_THRES_DROP_EN | |
| FC_THRES_MIN, MTK_QDMA_FC_THRES); |
| mtk_w32(eth, 0x0, MTK_QDMA_HRED2); |
| } |
| |
| return 0; |
| } |
| |
| static void mtk_dma_free(struct mtk_eth *eth) |
| { |
| int i; |
| |
| for (i = 0; i < MTK_MAC_COUNT; i++) |
| if (eth->netdev[i]) |
| netdev_reset_queue(eth->netdev[i]); |
| if (eth->scratch_ring) { |
| dma_free_coherent(eth->dev, |
| MTK_DMA_SIZE * sizeof(struct mtk_tx_dma), |
| eth->scratch_ring, |
| eth->phy_scratch_ring); |
| eth->scratch_ring = NULL; |
| eth->phy_scratch_ring = 0; |
| } |
| mtk_tx_clean(eth); |
| mtk_rx_clean(eth, ð->rx_ring[0]); |
| mtk_rx_clean(eth, ð->rx_ring_qdma); |
| |
| if (eth->hwlro) { |
| mtk_hwlro_rx_uninit(eth); |
| for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) |
| mtk_rx_clean(eth, ð->rx_ring[i]); |
| } |
| |
| kfree(eth->scratch_head); |
| } |
| |
| static void mtk_tx_timeout(struct net_device *dev, unsigned int txqueue) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| |
| eth->netdev[mac->id]->stats.tx_errors++; |
| netif_err(eth, tx_err, dev, |
| "transmit timed out\n"); |
| schedule_work(ð->pending_work); |
| } |
| |
| static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth) |
| { |
| struct mtk_eth *eth = _eth; |
| |
| eth->rx_events++; |
| if (likely(napi_schedule_prep(ð->rx_napi))) { |
| __napi_schedule(ð->rx_napi); |
| mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t mtk_handle_irq_tx(int irq, void *_eth) |
| { |
| struct mtk_eth *eth = _eth; |
| |
| eth->tx_events++; |
| if (likely(napi_schedule_prep(ð->tx_napi))) { |
| __napi_schedule(ð->tx_napi); |
| mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t mtk_handle_irq(int irq, void *_eth) |
| { |
| struct mtk_eth *eth = _eth; |
| |
| if (mtk_r32(eth, MTK_PDMA_INT_MASK) & MTK_RX_DONE_INT) { |
| if (mtk_r32(eth, MTK_PDMA_INT_STATUS) & MTK_RX_DONE_INT) |
| mtk_handle_irq_rx(irq, _eth); |
| } |
| if (mtk_r32(eth, eth->tx_int_mask_reg) & MTK_TX_DONE_INT) { |
| if (mtk_r32(eth, eth->tx_int_status_reg) & MTK_TX_DONE_INT) |
| mtk_handle_irq_tx(irq, _eth); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static void mtk_poll_controller(struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| |
| mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); |
| mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); |
| mtk_handle_irq_rx(eth->irq[2], dev); |
| mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); |
| mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); |
| } |
| #endif |
| |
| static int mtk_start_dma(struct mtk_eth *eth) |
| { |
| u32 rx_2b_offset = (NET_IP_ALIGN == 2) ? MTK_RX_2B_OFFSET : 0; |
| int err; |
| |
| err = mtk_dma_init(eth); |
| if (err) { |
| mtk_dma_free(eth); |
| return err; |
| } |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { |
| mtk_w32(eth, |
| MTK_TX_WB_DDONE | MTK_TX_DMA_EN | |
| MTK_TX_BT_32DWORDS | MTK_NDP_CO_PRO | |
| MTK_RX_DMA_EN | MTK_RX_2B_OFFSET | |
| MTK_RX_BT_32DWORDS, |
| MTK_QDMA_GLO_CFG); |
| |
| mtk_w32(eth, |
| MTK_RX_DMA_EN | rx_2b_offset | |
| MTK_RX_BT_32DWORDS | MTK_MULTI_EN, |
| MTK_PDMA_GLO_CFG); |
| } else { |
| mtk_w32(eth, MTK_TX_WB_DDONE | MTK_TX_DMA_EN | MTK_RX_DMA_EN | |
| MTK_MULTI_EN | MTK_PDMA_SIZE_8DWORDS, |
| MTK_PDMA_GLO_CFG); |
| } |
| |
| return 0; |
| } |
| |
| static void mtk_gdm_config(struct mtk_eth *eth, u32 config) |
| { |
| int i; |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) |
| return; |
| |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i)); |
| |
| /* default setup the forward port to send frame to PDMA */ |
| val &= ~0xffff; |
| |
| /* Enable RX checksum */ |
| val |= MTK_GDMA_ICS_EN | MTK_GDMA_TCS_EN | MTK_GDMA_UCS_EN; |
| |
| val |= config; |
| |
| if (!i && eth->netdev[0] && netdev_uses_dsa(eth->netdev[0])) |
| val |= MTK_GDMA_SPECIAL_TAG; |
| |
| mtk_w32(eth, val, MTK_GDMA_FWD_CFG(i)); |
| } |
| /* Reset and enable PSE */ |
| mtk_w32(eth, RST_GL_PSE, MTK_RST_GL); |
| mtk_w32(eth, 0, MTK_RST_GL); |
| } |
| |
| static int mtk_open(struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| int err; |
| |
| err = phylink_of_phy_connect(mac->phylink, mac->of_node, 0); |
| if (err) { |
| netdev_err(dev, "%s: could not attach PHY: %d\n", __func__, |
| err); |
| return err; |
| } |
| |
| /* we run 2 netdevs on the same dma ring so we only bring it up once */ |
| if (!refcount_read(ð->dma_refcnt)) { |
| u32 gdm_config = MTK_GDMA_TO_PDMA; |
| int err; |
| |
| err = mtk_start_dma(eth); |
| if (err) |
| return err; |
| |
| if (eth->soc->offload_version && mtk_ppe_start(ð->ppe) == 0) |
| gdm_config = MTK_GDMA_TO_PPE; |
| |
| mtk_gdm_config(eth, gdm_config); |
| |
| napi_enable(ð->tx_napi); |
| napi_enable(ð->rx_napi); |
| mtk_tx_irq_enable(eth, MTK_TX_DONE_INT); |
| mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); |
| refcount_set(ð->dma_refcnt, 1); |
| } |
| else |
| refcount_inc(ð->dma_refcnt); |
| |
| phylink_start(mac->phylink); |
| netif_start_queue(dev); |
| return 0; |
| } |
| |
| static void mtk_stop_dma(struct mtk_eth *eth, u32 glo_cfg) |
| { |
| u32 val; |
| int i; |
| |
| /* stop the dma engine */ |
| spin_lock_bh(ð->page_lock); |
| val = mtk_r32(eth, glo_cfg); |
| mtk_w32(eth, val & ~(MTK_TX_WB_DDONE | MTK_RX_DMA_EN | MTK_TX_DMA_EN), |
| glo_cfg); |
| spin_unlock_bh(ð->page_lock); |
| |
| /* wait for dma stop */ |
| for (i = 0; i < 10; i++) { |
| val = mtk_r32(eth, glo_cfg); |
| if (val & (MTK_TX_DMA_BUSY | MTK_RX_DMA_BUSY)) { |
| msleep(20); |
| continue; |
| } |
| break; |
| } |
| } |
| |
| static int mtk_stop(struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| |
| phylink_stop(mac->phylink); |
| |
| netif_tx_disable(dev); |
| |
| phylink_disconnect_phy(mac->phylink); |
| |
| /* only shutdown DMA if this is the last user */ |
| if (!refcount_dec_and_test(ð->dma_refcnt)) |
| return 0; |
| |
| mtk_gdm_config(eth, MTK_GDMA_DROP_ALL); |
| |
| mtk_tx_irq_disable(eth, MTK_TX_DONE_INT); |
| mtk_rx_irq_disable(eth, MTK_RX_DONE_INT); |
| napi_disable(ð->tx_napi); |
| napi_disable(ð->rx_napi); |
| |
| cancel_work_sync(ð->rx_dim.work); |
| cancel_work_sync(ð->tx_dim.work); |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) |
| mtk_stop_dma(eth, MTK_QDMA_GLO_CFG); |
| mtk_stop_dma(eth, MTK_PDMA_GLO_CFG); |
| |
| mtk_dma_free(eth); |
| |
| if (eth->soc->offload_version) |
| mtk_ppe_stop(ð->ppe); |
| |
| return 0; |
| } |
| |
| static void ethsys_reset(struct mtk_eth *eth, u32 reset_bits) |
| { |
| regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL, |
| reset_bits, |
| reset_bits); |
| |
| usleep_range(1000, 1100); |
| regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL, |
| reset_bits, |
| ~reset_bits); |
| mdelay(10); |
| } |
| |
| static void mtk_clk_disable(struct mtk_eth *eth) |
| { |
| int clk; |
| |
| for (clk = MTK_CLK_MAX - 1; clk >= 0; clk--) |
| clk_disable_unprepare(eth->clks[clk]); |
| } |
| |
| static int mtk_clk_enable(struct mtk_eth *eth) |
| { |
| int clk, ret; |
| |
| for (clk = 0; clk < MTK_CLK_MAX ; clk++) { |
| ret = clk_prepare_enable(eth->clks[clk]); |
| if (ret) |
| goto err_disable_clks; |
| } |
| |
| return 0; |
| |
| err_disable_clks: |
| while (--clk >= 0) |
| clk_disable_unprepare(eth->clks[clk]); |
| |
| return ret; |
| } |
| |
| static void mtk_dim_rx(struct work_struct *work) |
| { |
| struct dim *dim = container_of(work, struct dim, work); |
| struct mtk_eth *eth = container_of(dim, struct mtk_eth, rx_dim); |
| struct dim_cq_moder cur_profile; |
| u32 val, cur; |
| |
| cur_profile = net_dim_get_rx_moderation(eth->rx_dim.mode, |
| dim->profile_ix); |
| spin_lock_bh(ð->dim_lock); |
| |
| val = mtk_r32(eth, MTK_PDMA_DELAY_INT); |
| val &= MTK_PDMA_DELAY_TX_MASK; |
| val |= MTK_PDMA_DELAY_RX_EN; |
| |
| cur = min_t(u32, DIV_ROUND_UP(cur_profile.usec, 20), MTK_PDMA_DELAY_PTIME_MASK); |
| val |= cur << MTK_PDMA_DELAY_RX_PTIME_SHIFT; |
| |
| cur = min_t(u32, cur_profile.pkts, MTK_PDMA_DELAY_PINT_MASK); |
| val |= cur << MTK_PDMA_DELAY_RX_PINT_SHIFT; |
| |
| mtk_w32(eth, val, MTK_PDMA_DELAY_INT); |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) |
| mtk_w32(eth, val, MTK_QDMA_DELAY_INT); |
| |
| spin_unlock_bh(ð->dim_lock); |
| |
| dim->state = DIM_START_MEASURE; |
| } |
| |
| static void mtk_dim_tx(struct work_struct *work) |
| { |
| struct dim *dim = container_of(work, struct dim, work); |
| struct mtk_eth *eth = container_of(dim, struct mtk_eth, tx_dim); |
| struct dim_cq_moder cur_profile; |
| u32 val, cur; |
| |
| cur_profile = net_dim_get_tx_moderation(eth->tx_dim.mode, |
| dim->profile_ix); |
| spin_lock_bh(ð->dim_lock); |
| |
| val = mtk_r32(eth, MTK_PDMA_DELAY_INT); |
| val &= MTK_PDMA_DELAY_RX_MASK; |
| val |= MTK_PDMA_DELAY_TX_EN; |
| |
| cur = min_t(u32, DIV_ROUND_UP(cur_profile.usec, 20), MTK_PDMA_DELAY_PTIME_MASK); |
| val |= cur << MTK_PDMA_DELAY_TX_PTIME_SHIFT; |
| |
| cur = min_t(u32, cur_profile.pkts, MTK_PDMA_DELAY_PINT_MASK); |
| val |= cur << MTK_PDMA_DELAY_TX_PINT_SHIFT; |
| |
| mtk_w32(eth, val, MTK_PDMA_DELAY_INT); |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) |
| mtk_w32(eth, val, MTK_QDMA_DELAY_INT); |
| |
| spin_unlock_bh(ð->dim_lock); |
| |
| dim->state = DIM_START_MEASURE; |
| } |
| |
| static int mtk_hw_init(struct mtk_eth *eth) |
| { |
| int i, val, ret; |
| |
| if (test_and_set_bit(MTK_HW_INIT, ð->state)) |
| return 0; |
| |
| pm_runtime_enable(eth->dev); |
| pm_runtime_get_sync(eth->dev); |
| |
| ret = mtk_clk_enable(eth); |
| if (ret) |
| goto err_disable_pm; |
| |
| if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { |
| ret = device_reset(eth->dev); |
| if (ret) { |
| dev_err(eth->dev, "MAC reset failed!\n"); |
| goto err_disable_pm; |
| } |
| |
| /* set interrupt delays based on current Net DIM sample */ |
| mtk_dim_rx(ð->rx_dim.work); |
| mtk_dim_tx(ð->tx_dim.work); |
| |
| /* disable delay and normal interrupt */ |
| mtk_tx_irq_disable(eth, ~0); |
| mtk_rx_irq_disable(eth, ~0); |
| |
| return 0; |
| } |
| |
| /* Non-MT7628 handling... */ |
| ethsys_reset(eth, RSTCTRL_FE); |
| ethsys_reset(eth, RSTCTRL_PPE); |
| |
| if (eth->pctl) { |
| /* Set GE2 driving and slew rate */ |
| regmap_write(eth->pctl, GPIO_DRV_SEL10, 0xa00); |
| |
| /* set GE2 TDSEL */ |
| regmap_write(eth->pctl, GPIO_OD33_CTRL8, 0x5); |
| |
| /* set GE2 TUNE */ |
| regmap_write(eth->pctl, GPIO_BIAS_CTRL, 0x0); |
| } |
| |
| /* Set linkdown as the default for each GMAC. Its own MCR would be set |
| * up with the more appropriate value when mtk_mac_config call is being |
| * invoked. |
| */ |
| for (i = 0; i < MTK_MAC_COUNT; i++) |
| mtk_w32(eth, MAC_MCR_FORCE_LINK_DOWN, MTK_MAC_MCR(i)); |
| |
| /* Indicates CDM to parse the MTK special tag from CPU |
| * which also is working out for untag packets. |
| */ |
| val = mtk_r32(eth, MTK_CDMQ_IG_CTRL); |
| mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL); |
| |
| /* Enable RX VLan Offloading */ |
| mtk_w32(eth, 1, MTK_CDMP_EG_CTRL); |
| |
| /* set interrupt delays based on current Net DIM sample */ |
| mtk_dim_rx(ð->rx_dim.work); |
| mtk_dim_tx(ð->tx_dim.work); |
| |
| /* disable delay and normal interrupt */ |
| mtk_tx_irq_disable(eth, ~0); |
| mtk_rx_irq_disable(eth, ~0); |
| |
| /* FE int grouping */ |
| mtk_w32(eth, MTK_TX_DONE_INT, MTK_PDMA_INT_GRP1); |
| mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_GRP2); |
| mtk_w32(eth, MTK_TX_DONE_INT, MTK_QDMA_INT_GRP1); |
| mtk_w32(eth, MTK_RX_DONE_INT, MTK_QDMA_INT_GRP2); |
| mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP); |
| |
| return 0; |
| |
| err_disable_pm: |
| pm_runtime_put_sync(eth->dev); |
| pm_runtime_disable(eth->dev); |
| |
| return ret; |
| } |
| |
| static int mtk_hw_deinit(struct mtk_eth *eth) |
| { |
| if (!test_and_clear_bit(MTK_HW_INIT, ð->state)) |
| return 0; |
| |
| mtk_clk_disable(eth); |
| |
| pm_runtime_put_sync(eth->dev); |
| pm_runtime_disable(eth->dev); |
| |
| return 0; |
| } |
| |
| static int __init mtk_init(struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| int ret; |
| |
| ret = of_get_ethdev_address(mac->of_node, dev); |
| if (ret) { |
| /* If the mac address is invalid, use random mac address */ |
| eth_hw_addr_random(dev); |
| dev_err(eth->dev, "generated random MAC address %pM\n", |
| dev->dev_addr); |
| } |
| |
| return 0; |
| } |
| |
| static void mtk_uninit(struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| |
| phylink_disconnect_phy(mac->phylink); |
| mtk_tx_irq_disable(eth, ~0); |
| mtk_rx_irq_disable(eth, ~0); |
| } |
| |
| static int mtk_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| int length = new_mtu + MTK_RX_ETH_HLEN; |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_eth *eth = mac->hw; |
| u32 mcr_cur, mcr_new; |
| |
| if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { |
| mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); |
| mcr_new = mcr_cur & ~MAC_MCR_MAX_RX_MASK; |
| |
| if (length <= 1518) |
| mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1518); |
| else if (length <= 1536) |
| mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1536); |
| else if (length <= 1552) |
| mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1552); |
| else |
| mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_2048); |
| |
| if (mcr_new != mcr_cur) |
| mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id)); |
| } |
| |
| dev->mtu = new_mtu; |
| |
| return 0; |
| } |
| |
| static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| |
| switch (cmd) { |
| case SIOCGMIIPHY: |
| case SIOCGMIIREG: |
| case SIOCSMIIREG: |
| return phylink_mii_ioctl(mac->phylink, ifr, cmd); |
| default: |
| break; |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static void mtk_pending_work(struct work_struct *work) |
| { |
| struct mtk_eth *eth = container_of(work, struct mtk_eth, pending_work); |
| int err, i; |
| unsigned long restart = 0; |
| |
| rtnl_lock(); |
| |
| dev_dbg(eth->dev, "[%s][%d] reset\n", __func__, __LINE__); |
| |
| while (test_and_set_bit_lock(MTK_RESETTING, ð->state)) |
| cpu_relax(); |
| |
| dev_dbg(eth->dev, "[%s][%d] mtk_stop starts\n", __func__, __LINE__); |
| /* stop all devices to make sure that dma is properly shut down */ |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| if (!eth->netdev[i]) |
| continue; |
| mtk_stop(eth->netdev[i]); |
| __set_bit(i, &restart); |
| } |
| dev_dbg(eth->dev, "[%s][%d] mtk_stop ends\n", __func__, __LINE__); |
| |
| /* restart underlying hardware such as power, clock, pin mux |
| * and the connected phy |
| */ |
| mtk_hw_deinit(eth); |
| |
| if (eth->dev->pins) |
| pinctrl_select_state(eth->dev->pins->p, |
| eth->dev->pins->default_state); |
| mtk_hw_init(eth); |
| |
| /* restart DMA and enable IRQs */ |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| if (!test_bit(i, &restart)) |
| continue; |
| err = mtk_open(eth->netdev[i]); |
| if (err) { |
| netif_alert(eth, ifup, eth->netdev[i], |
| "Driver up/down cycle failed, closing device.\n"); |
| dev_close(eth->netdev[i]); |
| } |
| } |
| |
| dev_dbg(eth->dev, "[%s][%d] reset done\n", __func__, __LINE__); |
| |
| clear_bit_unlock(MTK_RESETTING, ð->state); |
| |
| rtnl_unlock(); |
| } |
| |
| static int mtk_free_dev(struct mtk_eth *eth) |
| { |
| int i; |
| |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| if (!eth->netdev[i]) |
| continue; |
| free_netdev(eth->netdev[i]); |
| } |
| |
| return 0; |
| } |
| |
| static int mtk_unreg_dev(struct mtk_eth *eth) |
| { |
| int i; |
| |
| for (i = 0; i < MTK_MAC_COUNT; i++) { |
| if (!eth->netdev[i]) |
| continue; |
| unregister_netdev(eth->netdev[i]); |
| } |
| |
| return 0; |
| } |
| |
| static int mtk_cleanup(struct mtk_eth *eth) |
| { |
| mtk_unreg_dev(eth); |
| mtk_free_dev(eth); |
| cancel_work_sync(ð->pending_work); |
| |
| return 0; |
| } |
| |
| static int mtk_get_link_ksettings(struct net_device *ndev, |
| struct ethtool_link_ksettings *cmd) |
| { |
| struct mtk_mac *mac = netdev_priv(ndev); |
| |
| if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) |
| return -EBUSY; |
| |
| return phylink_ethtool_ksettings_get(mac->phylink, cmd); |
| } |
| |
| static int mtk_set_link_ksettings(struct net_device *ndev, |
| const struct ethtool_link_ksettings *cmd) |
| { |
| struct mtk_mac *mac = netdev_priv(ndev); |
| |
| if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) |
| return -EBUSY; |
| |
| return phylink_ethtool_ksettings_set(mac->phylink, cmd); |
| } |
| |
| static void mtk_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *info) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| |
| strlcpy(info->driver, mac->hw->dev->driver->name, sizeof(info->driver)); |
| strlcpy(info->bus_info, dev_name(mac->hw->dev), sizeof(info->bus_info)); |
| info->n_stats = ARRAY_SIZE(mtk_ethtool_stats); |
| } |
| |
| static u32 mtk_get_msglevel(struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| |
| return mac->hw->msg_enable; |
| } |
| |
| static void mtk_set_msglevel(struct net_device *dev, u32 value) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| |
| mac->hw->msg_enable = value; |
| } |
| |
| static int mtk_nway_reset(struct net_device *dev) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| |
| if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) |
| return -EBUSY; |
| |
| if (!mac->phylink) |
| return -ENOTSUPP; |
| |
| return phylink_ethtool_nway_reset(mac->phylink); |
| } |
| |
| static void mtk_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
| { |
| int i; |
| |
| switch (stringset) { |
| case ETH_SS_STATS: |
| for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) { |
| memcpy(data, mtk_ethtool_stats[i].str, ETH_GSTRING_LEN); |
| data += ETH_GSTRING_LEN; |
| } |
| break; |
| } |
| } |
| |
| static int mtk_get_sset_count(struct net_device *dev, int sset) |
| { |
| switch (sset) { |
| case ETH_SS_STATS: |
| return ARRAY_SIZE(mtk_ethtool_stats); |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static void mtk_get_ethtool_stats(struct net_device *dev, |
| struct ethtool_stats *stats, u64 *data) |
| { |
| struct mtk_mac *mac = netdev_priv(dev); |
| struct mtk_hw_stats *hwstats = mac->hw_stats; |
| u64 *data_src, *data_dst; |
| unsigned int start; |
| int i; |
| |
| if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) |
| return; |
| |
| if (netif_running(dev) && netif_device_present(dev)) { |
| if (spin_trylock_bh(&hwstats->stats_lock)) { |
| mtk_stats_update_mac(mac); |
| spin_unlock_bh(&hwstats->stats_lock); |
| } |
| } |
| |
| data_src = (u64 *)hwstats; |
| |
| do { |
| data_dst = data; |
| start = u64_stats_fetch_begin_irq(&hwstats->syncp); |
| |
| for (i = 0; i < ARRAY_SIZE(mtk_ethtool_stats); i++) |
| *data_dst++ = *(data_src + mtk_ethtool_stats[i].offset); |
| } while (u64_stats_fetch_retry_irq(&hwstats->syncp, start)); |
| } |
| |
| static int mtk_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd, |
| u32 *rule_locs) |
| { |
| int ret = -EOPNOTSUPP; |
| |
| switch (cmd->cmd) { |
| case ETHTOOL_GRXRINGS: |
| if (dev->hw_features & NETIF_F_LRO) { |
| cmd->data = MTK_MAX_RX_RING_NUM; |
| ret = 0; |
| } |
| break; |
| case ETHTOOL_GRXCLSRLCNT: |
| if (dev->hw_features & NETIF_F_LRO) { |
| struct mtk_mac *mac = netdev_priv(dev); |
| |
| cmd->rule_cnt = mac->hwlro_ip_cnt; |
| ret = 0; |
| } |
| break; |
| case ETHTOOL_GRXCLSRULE: |
| if (dev->hw_features & NETIF_F_LRO) |
| ret = mtk_hwlro_get_fdir_entry(dev, cmd); |
| break; |
| case ETHTOOL_GRXCLSRLALL: |
| if (dev->hw_features & NETIF_F_LRO) |
| ret = mtk_hwlro_get_fdir_all(dev, cmd, |
| rule_locs); |
| break; |
| default: |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int mtk_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd) |
| { |
| int ret = -EOPNOTSUPP; |
| |
| switch (cmd->cmd) { |
| case ETHTOOL_SRXCLSRLINS: |
| if (dev->hw_features & NETIF_F_LRO) |
| ret = mtk_hwlro_add_ipaddr(dev, cmd); |
| break; |
| case ETHTOOL_SRXCLSRLDEL: |
| if (dev->hw_features & NETIF_F_LRO) |
| ret = mtk_hwlro_del_ipaddr(dev, cmd); |
| break; |
| default: |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static const struct ethtool_ops mtk_ethtool_ops = { |
| .get_link_ksettings = mtk_get_link_ksettings, |
| .set_link_ksettings = mtk_set_link_ksettings, |
| .get_drvinfo = mtk_get_drvinfo, |
| .get_msglevel = mtk_get_msglevel, |
| .set_msglevel = mtk_set_msglevel, |
| .nway_reset = mtk_nway_reset, |
| .get_link = ethtool_op_get_link, |
| .get_strings = mtk_get_strings, |
| .get_sset_count = mtk_get_sset_count, |
| .get_ethtool_stats = mtk_get_ethtool_stats, |
| .get_rxnfc = mtk_get_rxnfc, |
| .set_rxnfc = mtk_set_rxnfc, |
| }; |
| |
| static const struct net_device_ops mtk_netdev_ops = { |
| .ndo_init = mtk_init, |
| .ndo_uninit = mtk_uninit, |
| .ndo_open = mtk_open, |
| .ndo_stop = mtk_stop, |
| .ndo_start_xmit = mtk_start_xmit, |
| .ndo_set_mac_address = mtk_set_mac_address, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_eth_ioctl = mtk_do_ioctl, |
| .ndo_change_mtu = mtk_change_mtu, |
| .ndo_tx_timeout = mtk_tx_timeout, |
| .ndo_get_stats64 = mtk_get_stats64, |
| .ndo_fix_features = mtk_fix_features, |
| .ndo_set_features = mtk_set_features, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = mtk_poll_controller, |
| #endif |
| .ndo_setup_tc = mtk_eth_setup_tc, |
| }; |
| |
| static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np) |
| { |
| const __be32 *_id = of_get_property(np, "reg", NULL); |
| phy_interface_t phy_mode; |
| struct phylink *phylink; |
| struct mtk_mac *mac; |
| int id, err; |
| |
| if (!_id) { |
| dev_err(eth->dev, "missing mac id\n"); |
| return -EINVAL; |
| } |
| |
| id = be32_to_cpup(_id); |
| if (id >= MTK_MAC_COUNT) { |
| dev_err(eth->dev, "%d is not a valid mac id\n", id); |
| return -EINVAL; |
| } |
| |
| if (eth->netdev[id]) { |
| dev_err(eth->dev, "duplicate mac id found: %d\n", id); |
| return -EINVAL; |
| } |
| |
| eth->netdev[id] = alloc_etherdev(sizeof(*mac)); |
| if (!eth->netdev[id]) { |
| dev_err(eth->dev, "alloc_etherdev failed\n"); |
| return -ENOMEM; |
| } |
| mac = netdev_priv(eth->netdev[id]); |
| eth->mac[id] = mac; |
| mac->id = id; |
| mac->hw = eth; |
| mac->of_node = np; |
| |
|