diff options
Diffstat (limited to 'drivers/net/ethernet/mediatek/mtk_eth_soc.c')
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2689 |
1 files changed, 2689 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c new file mode 100644 index 000000000..53cff913a --- /dev/null +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -0,0 +1,2689 @@ +/* This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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 "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", "esw", "gp0", "gp1", "gp2", "trgpll", "sgmii_tx250m", + "sgmii_rx250m", "sgmii_cdr_ref", "sgmii_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 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; + usleep_range(10, 20); + } + + 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 void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth, int speed) +{ + u32 val; + int ret; + + 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_gmac_sgmii_hw_setup(struct mtk_eth *eth, int mac_id) +{ + u32 val; + + /* Setup the link timer and QPHY power up inside SGMIISYS */ + regmap_write(eth->sgmiisys, SGMSYS_PCS_LINK_TIMER, + SGMII_LINK_TIMER_DEFAULT); + + regmap_read(eth->sgmiisys, SGMSYS_SGMII_MODE, &val); + val |= SGMII_REMOTE_FAULT_DIS; + regmap_write(eth->sgmiisys, SGMSYS_SGMII_MODE, val); + + regmap_read(eth->sgmiisys, SGMSYS_PCS_CONTROL_1, &val); + val |= SGMII_AN_RESTART; + regmap_write(eth->sgmiisys, SGMSYS_PCS_CONTROL_1, val); + + regmap_read(eth->sgmiisys, SGMSYS_QPHY_PWR_STATE_CTRL, &val); + val &= ~SGMII_PHYA_PWD; + regmap_write(eth->sgmiisys, SGMSYS_QPHY_PWR_STATE_CTRL, val); + + /* Determine MUX for which GMAC uses the SGMII interface */ + if (MTK_HAS_CAPS(eth->soc->caps, MTK_DUAL_GMAC_SHARED_SGMII)) { + regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); + val &= ~SYSCFG0_SGMII_MASK; + val |= !mac_id ? SYSCFG0_SGMII_GMAC1 : SYSCFG0_SGMII_GMAC2; + regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); + + dev_info(eth->dev, "setup shared sgmii for gmac=%d\n", + mac_id); + } + + /* Setup the GMAC1 going through SGMII path when SoC also support + * ESW on GMAC1 + */ + if (MTK_HAS_CAPS(eth->soc->caps, MTK_GMAC1_ESW | MTK_GMAC1_SGMII) && + !mac_id) { + mtk_w32(eth, 0, MTK_MAC_MISC); + dev_info(eth->dev, "setup gmac1 going through sgmii"); + } +} + +static void mtk_phy_link_adjust(struct net_device *dev) +{ + struct mtk_mac *mac = netdev_priv(dev); + u16 lcl_adv = 0, rmt_adv = 0; + u8 flowctrl; + u32 mcr = MAC_MCR_MAX_RX_1536 | MAC_MCR_IPG_CFG | + MAC_MCR_FORCE_MODE | MAC_MCR_TX_EN | + MAC_MCR_RX_EN | MAC_MCR_BACKOFF_EN | + MAC_MCR_BACKPR_EN; + + if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) + return; + + switch (dev->phydev->speed) { + case SPEED_1000: + mcr |= MAC_MCR_SPEED_1000; + break; + case SPEED_100: + mcr |= MAC_MCR_SPEED_100; + break; + }; + + if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GMAC1_TRGMII) && + !mac->id && !mac->trgmii) + mtk_gmac0_rgmii_adjust(mac->hw, dev->phydev->speed); + + if (dev->phydev->link) + mcr |= MAC_MCR_FORCE_LINK; + + if (dev->phydev->duplex) { + mcr |= MAC_MCR_FORCE_DPX; + + if (dev->phydev->pause) + rmt_adv = LPA_PAUSE_CAP; + if (dev->phydev->asym_pause) + rmt_adv |= LPA_PAUSE_ASYM; + + if (dev->phydev->advertising & ADVERTISED_Pause) + lcl_adv |= ADVERTISE_PAUSE_CAP; + if (dev->phydev->advertising & ADVERTISED_Asym_Pause) + lcl_adv |= ADVERTISE_PAUSE_ASYM; + + flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv); + + if (flowctrl & FLOW_CTRL_TX) + mcr |= MAC_MCR_FORCE_TX_FC; + if (flowctrl & FLOW_CTRL_RX) + mcr |= MAC_MCR_FORCE_RX_FC; + + netif_dbg(mac->hw, link, dev, "rx pause %s, tx pause %s\n", + flowctrl & FLOW_CTRL_RX ? "enabled" : "disabled", + flowctrl & FLOW_CTRL_TX ? "enabled" : "disabled"); + } + + mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id)); + + if (dev->phydev->link) + netif_carrier_on(dev); + else + netif_carrier_off(dev); + + if (!of_phy_is_fixed_link(mac->of_node)) + phy_print_status(dev->phydev); +} + +static int mtk_phy_connect_node(struct mtk_eth *eth, struct mtk_mac *mac, + struct device_node *phy_node) +{ + struct phy_device *phydev; + int phy_mode; + + phy_mode = of_get_phy_mode(phy_node); + if (phy_mode < 0) { + dev_err(eth->dev, "incorrect phy-mode %d\n", phy_mode); + return -EINVAL; + } + + phydev = of_phy_connect(eth->netdev[mac->id], phy_node, + mtk_phy_link_adjust, 0, phy_mode); + if (!phydev) { + dev_err(eth->dev, "could not connect to PHY\n"); + return -ENODEV; + } + + dev_info(eth->dev, + "connected mac %d to PHY at %s [uid=%08x, driver=%s]\n", + mac->id, phydev_name(phydev), phydev->phy_id, + phydev->drv->name); + + return 0; +} + +static int mtk_phy_connect(struct net_device *dev) +{ + struct mtk_mac *mac = netdev_priv(dev); + struct mtk_eth *eth; + struct device_node *np; + u32 val; + + eth = mac->hw; + np = of_parse_phandle(mac->of_node, "phy-handle", 0); + if (!np && of_phy_is_fixed_link(mac->of_node)) + if (!of_phy_register_fixed_link(mac->of_node)) + np = of_node_get(mac->of_node); + if (!np) + return -ENODEV; + + mac->ge_mode = 0; + switch (of_get_phy_mode(np)) { + case PHY_INTERFACE_MODE_TRGMII: + mac->trgmii = true; + case PHY_INTERFACE_MODE_RGMII_TXID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII: + break; + case PHY_INTERFACE_MODE_SGMII: + if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) + mtk_gmac_sgmii_hw_setup(eth, mac->id); + break; + case PHY_INTERFACE_MODE_MII: + mac->ge_mode = 1; + break; + case PHY_INTERFACE_MODE_REVMII: + mac->ge_mode = 2; + break; + case PHY_INTERFACE_MODE_RMII: + if (!mac->id) + goto err_phy; + mac->ge_mode = 3; + break; + default: + goto err_phy; + } + + /* 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(mac->ge_mode, mac->id); + regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); + + /* couple phydev to net_device */ + if (mtk_phy_connect_node(eth, mac, np)) + goto err_phy; + + dev->phydev->autoneg = AUTONEG_ENABLE; + dev->phydev->speed = 0; + dev->phydev->duplex = 0; + + if (of_phy_is_fixed_link(mac->of_node)) + dev->phydev->supported |= + SUPPORTED_Pause | SUPPORTED_Asym_Pause; + + dev->phydev->supported &= PHY_GBIT_FEATURES | SUPPORTED_Pause | + SUPPORTED_Asym_Pause; + dev->phydev->advertising = dev->phydev->supported | + ADVERTISED_Autoneg; + phy_start_aneg(dev->phydev); + + of_node_put(np); + + return 0; + +err_phy: + if (of_phy_is_fixed_link(mac->of_node)) + of_phy_deregister_fixed_link(mac->of_node); + of_node_put(np); + dev_err(eth->dev, "%s: invalid phy\n", __func__); + return -EINVAL; +} + +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, "%s", mii_np->name); + 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, MTK_QDMA_INT_MASK); + mtk_w32(eth, val & ~mask, MTK_QDMA_INT_MASK); + 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, MTK_QDMA_INT_MASK); + mtk_w32(eth, val | mask, MTK_QDMA_INT_MASK); + 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); + 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); + 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; + unsigned int base = MTK_GDM1_TX_GBCNT; + u64 stats; + + base += hw_stats->reg_offset; + + u64_stats_update_begin(&hw_stats->syncp); + + hw_stats->rx_bytes += mtk_r32(mac->hw, base); + stats = mtk_r32(mac->hw, base + 0x04); + if (stats) + hw_stats->rx_bytes += (stats << 32); + hw_stats->rx_packets += mtk_r32(mac->hw, base + 0x08); + hw_stats->rx_overflow += mtk_r32(mac->hw, base + 0x10); + hw_stats->rx_fcs_errors += mtk_r32(mac->hw, base + 0x14); + hw_stats->rx_short_errors += mtk_r32(mac->hw, base + 0x18); + hw_stats->rx_long_errors += mtk_r32(mac->hw, base + 0x1c); + hw_stats->rx_checksum_errors += mtk_r32(mac->hw, base + 0x20); + hw_stats->rx_flow_control_packets += + mtk_r32(mac->hw, base + 0x24); + hw_stats->tx_skip += mtk_r32(mac->hw, base + 0x28); + hw_stats->tx_collisions += mtk_r32(mac->hw, base + 0x2c); + hw_stats->tx_bytes += mtk_r32(mac->hw, base + 0x30); + stats = mtk_r32(mac->hw, base + 0x34); + if (stats) + hw_stats->tx_bytes += (stats << 32); + hw_stats->tx_packets += mtk_r32(mac->hw, base + 0x38); + 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) + mtu = MTK_MAX_RX_LENGTH - 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); + + return buf_size; +} + +static inline void mtk_rx_get_desc(struct mtk_rx_dma *rxd, + struct mtk_rx_dma *dma_rxd) +{ + rxd->rxd1 = READ_ONCE(dma_rxd->rxd1); + rxd->rxd2 = READ_ONCE(dma_rxd->rxd2); + rxd->rxd3 = READ_ONCE(dma_rxd->rxd3); + rxd->rxd4 = READ_ONCE(dma_rxd->rxd4); +} + +static void *mtk_max_lro_buf_alloc(gfp_t gfp_mask) +{ + unsigned int size = mtk_max_frag_size(MTK_MAX_LRO_RX_LENGTH); + unsigned long data; + + data = __get_free_pages(gfp_mask | __GFP_COMP | __GFP_NOWARN, + get_order(size)); + + return (void *)data; +} + +/* 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_zalloc_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 void mtk_tx_unmap(struct mtk_eth *eth, struct mtk_tx_buf *tx_buf) +{ + 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); + } + tx_buf->flags = 0; + if (tx_buf->skb && + (tx_buf->skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC)) + dev_kfree_skb_any(tx_buf->skb); + tx_buf->skb = NULL; +} + +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_buf *itx_buf, *tx_buf; + dma_addr_t mapped_addr; + unsigned int nr_frags; + int i, n_desc = 1; + u32 txd4 = 0, fport; + + itxd = ring->next_free; + 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; + dma_unmap_addr_set(itx_buf, dma_addr0, mapped_addr); + dma_unmap_len_set(itx_buf, dma_len0, skb_headlen(skb)); + + /* TX SG offload */ + txd = itxd; + nr_frags = skb_shinfo(skb)->nr_frags; + for (i = 0; i < nr_frags; i++) { + struct skb_frag_struct *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; + + txd = mtk_qdma_phys_to_virt(ring, txd->txd2); + if (txd == ring->last_free) + goto err_dma; + + n_desc++; + 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); + 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; + + dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); + dma_unmap_len_set(tx_buf, dma_len0, frag_map_size); + 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))); + + 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 (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) || !skb->xmit_more) + mtk_w32(eth, txd->txd2, MTK_QTX_CTX_PTR); + + return 0; + +err_dma: + do { + tx_buf = mtk_desc_to_tx_buf(ring, itxd); + + /* unmap dma */ + mtk_tx_unmap(eth, tx_buf); + + itxd->txd3 = TX_DMA_LS0 | TX_DMA_OWNER_CPU; + itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2); + } while (itxd != txd); + + return -ENOMEM; +} + +static inline int mtk_cal_txd_req(struct sk_buff *skb) +{ + int i, nfrags; + struct skb_frag_struct *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(frag->size, 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 void mtk_stop_queue(struct mtk_eth *eth) +{ + int i; + + for (i = 0; i < MTK_MAC_COUNT; i++) { + if (!eth->netdev[i]) + continue; + netif_stop_queue(eth->netdev[i]); + } +} + +static int 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)) { + mtk_stop_queue(eth); + 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)) + mtk_stop_queue(eth); + + 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_RX_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 mtk_rx_ring *ring; + int idx; + struct sk_buff *skb; + u8 *data, *new_data; + struct mtk_rx_dma *rxd, trxd; + int done = 0; + + while (done < budget) { + struct net_device *netdev; + unsigned int pktlen; + dma_addr_t dma_addr; + int mac = 0; + + ring = mtk_get_rx_ring(eth); + if (unlikely(!ring)) + goto rx_done; + + idx = NEXT_RX_DESP_IDX(ring->calc_idx, ring->dma_size); + rxd = &ring->dma[idx]; + data = ring->data[idx]; + + mtk_rx_get_desc(&trxd, rxd); + if (!(trxd.rxd2 & RX_DMA_DONE)) + break; + + /* find out which mac the packet come from. values start at 1 */ + mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) & + RX_DMA_FPORT_MASK; + mac--; + + 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 */ + if (ring->frag_size <= PAGE_SIZE) + new_data = napi_alloc_frag(ring->frag_size); + else + new_data = mtk_max_lro_buf_alloc(GFP_ATOMIC); + if (unlikely(!new_data)) { + netdev->stats.rx_dropped++; + goto release_desc; + } + dma_addr = dma_map_single(eth->dev, + new_data + NET_SKB_PAD, + 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; + } + + /* receive data */ + skb = build_skb(data, ring->frag_size); + if (unlikely(!skb)) { + skb_free_frag(new_data); + netdev->stats.rx_dropped++; + goto release_desc; + } + skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); + + dma_unmap_single(eth->dev, trxd.rxd1, + ring->buf_size, DMA_FROM_DEVICE); + pktlen = RX_DMA_GET_PLEN0(trxd.rxd2); + skb->dev = netdev; + skb_put(skb, pktlen); + if (trxd.rxd4 & RX_DMA_L4_VALID) + skb->ip_summed = CHECKSUM_UNNECESSARY; + else + skb_checksum_none_assert(skb); + skb->protocol = eth_type_trans(skb, netdev); + + 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); + + ring->data[idx] = new_data; + rxd->rxd1 = (unsigned int)dma_addr; + +release_desc: + 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); + } + + return done; +} + +static int mtk_poll_tx(struct mtk_eth *eth, int budget) +{ + struct mtk_tx_ring *ring = ð->tx_ring; + struct mtk_tx_dma *desc; + struct sk_buff *skb; + struct mtk_tx_buf *tx_buf; + unsigned int done[MTK_MAX_DEVS]; + unsigned int bytes[MTK_MAX_DEVS]; + u32 cpu, dma; + int total = 0, i; + + memset(done, 0, sizeof(done)); + memset(bytes, 0, sizeof(bytes)); + + cpu = mtk_r32(eth, MTK_QTX_CRX_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); + + ring->last_free = desc; + atomic_inc(&ring->free_count); + + cpu = next_cpu; + } + + mtk_w32(eth, cpu, MTK_QTX_CRX_PTR); + + 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]; + } + + 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); + u32 status, mask; + int tx_done = 0; + + mtk_handle_status_irq(eth); + mtk_w32(eth, MTK_TX_DONE_INT, MTK_QMTK_INT_STATUS); + tx_done = mtk_poll_tx(eth, budget); + + if (unlikely(netif_msg_intr(eth))) { + status = mtk_r32(eth, MTK_QMTK_INT_STATUS); + mask = mtk_r32(eth, MTK_QDMA_INT_MASK); + dev_info(eth->dev, + "done tx %d, intr 0x%08x/0x%x\n", + tx_done, status, mask); + } + + if (tx_done == budget) + return budget; + + status = mtk_r32(eth, MTK_QMTK_INT_STATUS); + if (status & MTK_TX_DONE_INT) + return budget; + + napi_complete(napi); + 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); + u32 status, mask; + int rx_done = 0; + int remain_budget = budget; + + mtk_handle_status_irq(eth); + +poll_again: + mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_STATUS); + rx_done = mtk_poll_rx(napi, remain_budget, eth); + + if (unlikely(netif_msg_intr(eth))) { + status = mtk_r32(eth, MTK_PDMA_INT_STATUS); + mask = mtk_r32(eth, MTK_PDMA_INT_MASK); + dev_info(eth->dev, + "done rx %d, intr 0x%08x/0x%x\n", + rx_done, status, mask); + } + if (rx_done == remain_budget) + return budget; + + status = mtk_r32(eth, MTK_PDMA_INT_STATUS); + if (status & MTK_RX_DONE_INT) { + remain_budget -= rx_done; + goto poll_again; + } + napi_complete(napi); + mtk_rx_irq_enable(eth, MTK_RX_DONE_INT); + + return rx_done + budget - remain_budget; +} + +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_zalloc_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; + } + + 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->thresh = MAX_SKB_FRAGS; + + /* make sure that all changes to the dma ring are flushed before we + * continue + */ + wmb(); + + 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->phys + ((MTK_DMA_SIZE - 1) * sz), + MTK_QTX_DRX_PTR); + mtk_w32(eth, (QDMA_RES_THRES << 8) | QDMA_RES_THRES, MTK_QTX_CFG(0)); + + 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]); + 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; + } +} + +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++) { + if (ring->frag_size <= PAGE_SIZE) + ring->data[i] = netdev_alloc_frag(ring->frag_size); + else + ring->data[i] = mtk_max_lro_buf_alloc(GFP_KERNEL); + if (!ring->data[i]) + return -ENOMEM; + } + + ring->dma = dma_zalloc_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, + 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; + + 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; + + if (fsp->location >= ARRAY_SIZE(mac->hwlro_ip)) + return -EINVAL; + + /* 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 long t_start = jiffies; + + while (1) { + if (!(mtk_r32(eth, MTK_QDMA_GLO_CFG) & + (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) + return 0; + if (time_after(jiffies, t_start + MTK_DMA_BUSY_TIMEOUT)) + break; + } + + dev_err(eth->dev, "DMA init timeout\n"); + return -1; +} + +static int mtk_dma_init(struct mtk_eth *eth) +{ + int err; + u32 i; + + if (mtk_dma_busy_wait(eth)) + return -EBUSY; + + /* 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; + + 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; + } + + /* 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) +{ + 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; + + 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; + + 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; +} + +#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; + } + + mtk_w32(eth, + MTK_TX_WB_DDONE | MTK_TX_DMA_EN | + MTK_DMA_SIZE_16DWORDS | 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); + + return 0; +} + +static int mtk_open(struct net_device *dev) +{ + struct mtk_mac *mac = netdev_priv(dev); + struct mtk_eth *eth = mac->hw; + + /* we run 2 netdevs on the same dma ring so we only bring it up once */ + if (!refcount_read(ð->dma_refcnt)) { + int err = mtk_start_dma(eth); + + if (err) + return err; + + 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); + + phy_start(dev->phydev); + 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; + + netif_tx_disable(dev); + phy_stop(dev->phydev); + + /* only shutdown DMA if this is the last user */ + if (!refcount_dec_and_test(ð->dma_refcnt)) + return 0; + + 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); + + mtk_stop_dma(eth, MTK_QDMA_GLO_CFG); + mtk_stop_dma(eth, MTK_PDMA_GLO_CFG); + + mtk_dma_free(eth); + + 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 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; + + ethsys_reset(eth, RSTCTRL_FE); + ethsys_reset(eth, RSTCTRL_PPE); + + regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val); + for (i = 0; i < MTK_MAC_COUNT; i++) { + if (!eth->mac[i]) + continue; + val &= ~SYSCFG0_GE_MODE(SYSCFG0_GE_MASK, eth->mac[i]->id); + val |= SYSCFG0_GE_MODE(eth->mac[i]->ge_mode, eth->mac[i]->id); + } + regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val); + + 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_phy_link_adjust call is + * being invoked. + */ + for (i = 0; i < MTK_MAC_COUNT; i++) + mtk_w32(eth, 0, 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); + + /* enable interrupt delay for RX */ + mtk_w32(eth, MTK_PDMA_DELAY_RX_DELAY, MTK_PDMA_DELAY_INT); + + /* disable delay and normal interrupt */ + mtk_w32(eth, 0, MTK_QDMA_DELAY_INT); + mtk_tx_irq_disable(eth, ~0); + mtk_rx_irq_disable(eth, ~0); + mtk_w32(eth, RST_GL_PSE, MTK_RST_GL); + mtk_w32(eth, 0, MTK_RST_GL); + + /* 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); + + for (i = 0; i < 2; i++) { + u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i)); + + /* 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; + + /* setup the mac dma */ + mtk_w32(eth, val, MTK_GDMA_FWD_CFG(i)); + } + + 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; + const char *mac_addr; + + mac_addr = of_get_mac_address(mac->of_node); + if (mac_addr) + ether_addr_copy(dev->dev_addr, mac_addr); + + /* If the mac address is invalid, use random mac address */ + if (!is_valid_ether_addr(dev->dev_addr)) { + eth_hw_addr_random(dev); + dev_err(eth->dev, "generated random MAC address %pM\n", + dev->dev_addr); + } + + return mtk_phy_connect(dev); +} + +static void mtk_uninit(struct net_device *dev) +{ + struct mtk_mac *mac = netdev_priv(dev); + struct mtk_eth *eth = mac->hw; + + phy_disconnect(dev->phydev); + if (of_phy_is_fixed_link(mac->of_node)) + of_phy_deregister_fixed_link(mac->of_node); + mtk_tx_irq_disable(eth, ~0); + mtk_rx_irq_disable(eth, ~0); +} + +static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + switch (cmd) { + case SIOCGMIIPHY: + case SIOCGMIIREG: + case SIOCSMIIREG: + return phy_mii_ioctl(dev->phydev, 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); + + for (i = 0; i < MTK_MAC_COUNT; i++) { + if (!eth->mac[i] || + of_phy_is_fixed_link(eth->mac[i]->of_node)) + continue; + err = phy_init_hw(eth->netdev[i]->phydev); + if (err) + dev_err(eth->dev, "%s: PHY init failed.\n", + eth->netdev[i]->name); + } + + /* 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; + + phy_ethtool_ksettings_get(ndev->phydev, cmd); + + return 0; +} + +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 phy_ethtool_ksettings_set(ndev->phydev, 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; + + return genphy_restart_aneg(dev->phydev); +} + +static u32 mtk_get_link(struct net_device *dev) +{ + struct mtk_mac *mac = netdev_priv(dev); + int err; + + if (unlikely(test_bit(MTK_RESETTING, &mac->hw->state))) + return -EBUSY; + + err = genphy_update_link(dev->phydev); + if (err) + return ethtool_op_get_link(dev); + + return dev->phydev->link; +} + +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 = mtk_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_do_ioctl = mtk_do_ioctl, + .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 +}; + +static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np) +{ + struct mtk_mac *mac; + const __be32 *_id = of_get_property(np, "reg", NULL); + 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; + + memset(mac->hwlro_ip, 0, sizeof(mac->hwlro_ip)); + mac->hwlro_ip_cnt = 0; + + mac->hw_stats = devm_kzalloc(eth->dev, + sizeof(*mac->hw_stats), + GFP_KERNEL); + if (!mac->hw_stats) { + dev_err(eth->dev, "failed to allocate counter memory\n"); + err = -ENOMEM; + goto free_netdev; + } + spin_lock_init(&mac->hw_stats->stats_lock); + u64_stats_init(&mac->hw_stats->syncp); + mac->hw_stats->reg_offset = id * MTK_STAT_OFFSET; + + SET_NETDEV_DEV(eth->netdev[id], eth->dev); + eth->netdev[id]->watchdog_timeo = 5 * HZ; + eth->netdev[id]->netdev_ops = &mtk_netdev_ops; + eth->netdev[id]->base_addr = (unsigned long)eth->base; + + eth->netdev[id]->hw_features = MTK_HW_FEATURES; + if (eth->hwlro) + eth->netdev[id]->hw_features |= NETIF_F_LRO; + + eth->netdev[id]->vlan_features = MTK_HW_FEATURES & + ~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX); + eth->netdev[id]->features |= MTK_HW_FEATURES; + eth->netdev[id]->ethtool_ops = &mtk_ethtool_ops; + + eth->netdev[id]->irq = eth->irq[0]; + eth->netdev[id]->dev.of_node = np; + + eth->netdev[id]->max_mtu = MTK_MAX_RX_LENGTH - MTK_RX_ETH_HLEN; + + return 0; + +free_netdev: + free_netdev(eth->netdev[id]); + return err; +} + +static int mtk_probe(struct platform_device *pdev) +{ + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + struct device_node *mac_np; + struct mtk_eth *eth; + int err; + int i; + + eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL); + if (!eth) + return -ENOMEM; + + eth->soc = of_device_get_match_data(&pdev->dev); + + eth->dev = &pdev->dev; + eth->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(eth->base)) + return PTR_ERR(eth->base); + + spin_lock_init(ð->page_lock); + spin_lock_init(ð->tx_irq_lock); + spin_lock_init(ð->rx_irq_lock); + + eth->ethsys = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "mediatek,ethsys"); + if (IS_ERR(eth->ethsys)) { + dev_err(&pdev->dev, "no ethsys regmap found\n"); + return PTR_ERR(eth->ethsys); + } + + if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) { + eth->sgmiisys = + syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "mediatek,sgmiisys"); + if (IS_ERR(eth->sgmiisys)) { + dev_err(&pdev->dev, "no sgmiisys regmap found\n"); + return PTR_ERR(eth->sgmiisys); + } + } + + if (eth->soc->required_pctl) { + eth->pctl = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "mediatek,pctl"); + if (IS_ERR(eth->pctl)) { + dev_err(&pdev->dev, "no pctl regmap found\n"); + return PTR_ERR(eth->pctl); + } + } + + for (i = 0; i < 3; i++) { + eth->irq[i] = platform_get_irq(pdev, i); + if (eth->irq[i] < 0) { + dev_err(&pdev->dev, "no IRQ%d resource found\n", i); + return -ENXIO; + } + } + for (i = 0; i < ARRAY_SIZE(eth->clks); i++) { + eth->clks[i] = devm_clk_get(eth->dev, + mtk_clks_source_name[i]); + if (IS_ERR(eth->clks[i])) { + if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER) + return -EPROBE_DEFER; + if (eth->soc->required_clks & BIT(i)) { + dev_err(&pdev->dev, "clock %s not found\n", + mtk_clks_source_name[i]); + return -EINVAL; + } + eth->clks[i] = NULL; + } + } + + eth->msg_enable = netif_msg_init(mtk_msg_level, MTK_DEFAULT_MSG_ENABLE); + INIT_WORK(ð->pending_work, mtk_pending_work); + + err = mtk_hw_init(eth); + if (err) + return err; + + eth->hwlro = MTK_HAS_CAPS(eth->soc->caps, MTK_HWLRO); + + for_each_child_of_node(pdev->dev.of_node, mac_np) { + if (!of_device_is_compatible(mac_np, + "mediatek,eth-mac")) + continue; + + if (!of_device_is_available(mac_np)) + continue; + + err = mtk_add_mac(eth, mac_np); + if (err) + goto err_deinit_hw; + } + + err = devm_request_irq(eth->dev, eth->irq[1], mtk_handle_irq_tx, 0, + dev_name(eth->dev), eth); + if (err) + goto err_free_dev; + + err = devm_request_irq(eth->dev, eth->irq[2], mtk_handle_irq_rx, 0, + dev_name(eth->dev), eth); + if (err) + goto err_free_dev; + + err = mtk_mdio_init(eth); + if (err) + goto err_free_dev; + + for (i = 0; i < MTK_MAX_DEVS; i++) { + if (!eth->netdev[i]) + continue; + + err = register_netdev(eth->netdev[i]); + if (err) { + dev_err(eth->dev, "error bringing up device\n"); + goto err_deinit_mdio; + } else + netif_info(eth, probe, eth->netdev[i], + "mediatek frame engine at 0x%08lx, irq %d\n", + eth->netdev[i]->base_addr, eth->irq[0]); + } + + /* we run 2 devices on the same DMA ring so we need a dummy device + * for NAPI to work + */ + init_dummy_netdev(ð->dummy_dev); + netif_napi_add(ð->dummy_dev, ð->tx_napi, mtk_napi_tx, + MTK_NAPI_WEIGHT); + netif_napi_add(ð->dummy_dev, ð->rx_napi, mtk_napi_rx, + MTK_NAPI_WEIGHT); + + platform_set_drvdata(pdev, eth); + + return 0; + +err_deinit_mdio: + mtk_mdio_cleanup(eth); +err_free_dev: + mtk_free_dev(eth); +err_deinit_hw: + mtk_hw_deinit(eth); + + return err; +} + +static int mtk_remove(struct platform_device *pdev) +{ + struct mtk_eth *eth = platform_get_drvdata(pdev); + int i; + + /* 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]); + } + + mtk_hw_deinit(eth); + + netif_napi_del(ð->tx_napi); + netif_napi_del(ð->rx_napi); + mtk_cleanup(eth); + mtk_mdio_cleanup(eth); + + return 0; +} + +static const struct mtk_soc_data mt2701_data = { + .caps = MTK_GMAC1_TRGMII | MTK_HWLRO, + .required_clks = MT7623_CLKS_BITMAP, + .required_pctl = true, +}; + +static const struct mtk_soc_data mt7622_data = { + .caps = MTK_DUAL_GMAC_SHARED_SGMII | MTK_GMAC1_ESW | MTK_HWLRO, + .required_clks = MT7622_CLKS_BITMAP, + .required_pctl = false, +}; + +static const struct mtk_soc_data mt7623_data = { + .caps = MTK_GMAC1_TRGMII | MTK_HWLRO, + .required_clks = MT7623_CLKS_BITMAP, + .required_pctl = true, +}; + +const struct of_device_id of_mtk_match[] = { + { .compatible = "mediatek,mt2701-eth", .data = &mt2701_data}, + { .compatible = "mediatek,mt7622-eth", .data = &mt7622_data}, + { .compatible = "mediatek,mt7623-eth", .data = &mt7623_data}, + {}, +}; +MODULE_DEVICE_TABLE(of, of_mtk_match); + +static struct platform_driver mtk_driver = { + .probe = mtk_probe, + .remove = mtk_remove, + .driver = { + .name = "mtk_soc_eth", + .of_match_table = of_mtk_match, + }, +}; + +module_platform_driver(mtk_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); +MODULE_DESCRIPTION("Ethernet driver for MediaTek SoC"); |