diff options
Diffstat (limited to 'drivers/net/ethernet/socionext/sni_ave.c')
| -rw-r--r-- | drivers/net/ethernet/socionext/sni_ave.c | 1736 |
1 files changed, 1736 insertions, 0 deletions
diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c new file mode 100644 index 000000000000..111e7ca9df56 --- /dev/null +++ b/drivers/net/ethernet/socionext/sni_ave.c @@ -0,0 +1,1736 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * sni_ave.c - Socionext UniPhier AVE ethernet driver + * Copyright 2014 Panasonic Corporation + * Copyright 2015-2017 Socionext Inc. + */ + +#include <linux/bitops.h> +#include <linux/clk.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/mii.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/of_net.h> +#include <linux/of_mdio.h> +#include <linux/of_platform.h> +#include <linux/phy.h> +#include <linux/reset.h> +#include <linux/types.h> +#include <linux/u64_stats_sync.h> + +/* General Register Group */ +#define AVE_IDR 0x000 /* ID */ +#define AVE_VR 0x004 /* Version */ +#define AVE_GRR 0x008 /* Global Reset */ +#define AVE_CFGR 0x00c /* Configuration */ + +/* Interrupt Register Group */ +#define AVE_GIMR 0x100 /* Global Interrupt Mask */ +#define AVE_GISR 0x104 /* Global Interrupt Status */ + +/* MAC Register Group */ +#define AVE_TXCR 0x200 /* TX Setup */ +#define AVE_RXCR 0x204 /* RX Setup */ +#define AVE_RXMAC1R 0x208 /* MAC address (lower) */ +#define AVE_RXMAC2R 0x20c /* MAC address (upper) */ +#define AVE_MDIOCTR 0x214 /* MDIO Control */ +#define AVE_MDIOAR 0x218 /* MDIO Address */ +#define AVE_MDIOWDR 0x21c /* MDIO Data */ +#define AVE_MDIOSR 0x220 /* MDIO Status */ +#define AVE_MDIORDR 0x224 /* MDIO Rd Data */ + +/* Descriptor Control Register Group */ +#define AVE_DESCC 0x300 /* Descriptor Control */ +#define AVE_TXDC 0x304 /* TX Descriptor Configuration */ +#define AVE_RXDC0 0x308 /* RX Descriptor Ring0 Configuration */ +#define AVE_IIRQC 0x34c /* Interval IRQ Control */ + +/* Packet Filter Register Group */ +#define AVE_PKTF_BASE 0x800 /* PF Base Address */ +#define AVE_PFMBYTE_BASE 0xd00 /* PF Mask Byte Base Address */ +#define AVE_PFMBIT_BASE 0xe00 /* PF Mask Bit Base Address */ +#define AVE_PFSEL_BASE 0xf00 /* PF Selector Base Address */ +#define AVE_PFEN 0xffc /* Packet Filter Enable */ +#define AVE_PKTF(ent) (AVE_PKTF_BASE + (ent) * 0x40) +#define AVE_PFMBYTE(ent) (AVE_PFMBYTE_BASE + (ent) * 8) +#define AVE_PFMBIT(ent) (AVE_PFMBIT_BASE + (ent) * 4) +#define AVE_PFSEL(ent) (AVE_PFSEL_BASE + (ent) * 4) + +/* 64bit descriptor memory */ +#define AVE_DESC_SIZE_64 12 /* Descriptor Size */ + +#define AVE_TXDM_64 0x1000 /* Tx Descriptor Memory */ +#define AVE_RXDM_64 0x1c00 /* Rx Descriptor Memory */ + +#define AVE_TXDM_SIZE_64 0x0ba0 /* Tx Descriptor Memory Size 3KB */ +#define AVE_RXDM_SIZE_64 0x6000 /* Rx Descriptor Memory Size 24KB */ + +/* 32bit descriptor memory */ +#define AVE_DESC_SIZE_32 8 /* Descriptor Size */ + +#define AVE_TXDM_32 0x1000 /* Tx Descriptor Memory */ +#define AVE_RXDM_32 0x1800 /* Rx Descriptor Memory */ + +#define AVE_TXDM_SIZE_32 0x07c0 /* Tx Descriptor Memory Size 2KB */ +#define AVE_RXDM_SIZE_32 0x4000 /* Rx Descriptor Memory Size 16KB */ + +/* RMII Bridge Register Group */ +#define AVE_RSTCTRL 0x8028 /* Reset control */ +#define AVE_RSTCTRL_RMIIRST BIT(16) +#define AVE_LINKSEL 0x8034 /* Link speed setting */ +#define AVE_LINKSEL_100M BIT(0) + +/* AVE_GRR */ +#define AVE_GRR_RXFFR BIT(5) /* Reset RxFIFO */ +#define AVE_GRR_PHYRST BIT(4) /* Reset external PHY */ +#define AVE_GRR_GRST BIT(0) /* Reset all MAC */ + +/* AVE_CFGR */ +#define AVE_CFGR_FLE BIT(31) /* Filter Function */ +#define AVE_CFGR_CHE BIT(30) /* Checksum Function */ +#define AVE_CFGR_MII BIT(27) /* Func mode (1:MII/RMII, 0:RGMII) */ +#define AVE_CFGR_IPFCEN BIT(24) /* IP fragment sum Enable */ + +/* AVE_GISR (common with GIMR) */ +#define AVE_GI_PHY BIT(24) /* PHY interrupt */ +#define AVE_GI_TX BIT(16) /* Tx complete */ +#define AVE_GI_RXERR BIT(8) /* Receive frame more than max size */ +#define AVE_GI_RXOVF BIT(7) /* Overflow at the RxFIFO */ +#define AVE_GI_RXDROP BIT(6) /* Drop packet */ +#define AVE_GI_RXIINT BIT(5) /* Interval interrupt */ + +/* AVE_TXCR */ +#define AVE_TXCR_FLOCTR BIT(18) /* Flow control */ +#define AVE_TXCR_TXSPD_1G BIT(17) +#define AVE_TXCR_TXSPD_100 BIT(16) + +/* AVE_RXCR */ +#define AVE_RXCR_RXEN BIT(30) /* Rx enable */ +#define AVE_RXCR_FDUPEN BIT(22) /* Interface mode */ +#define AVE_RXCR_FLOCTR BIT(21) /* Flow control */ +#define AVE_RXCR_AFEN BIT(19) /* MAC address filter */ +#define AVE_RXCR_DRPEN BIT(18) /* Drop pause frame */ +#define AVE_RXCR_MPSIZ_MASK GENMASK(10, 0) + +/* AVE_MDIOCTR */ +#define AVE_MDIOCTR_RREQ BIT(3) /* Read request */ +#define AVE_MDIOCTR_WREQ BIT(2) /* Write request */ + +/* AVE_MDIOSR */ +#define AVE_MDIOSR_STS BIT(0) /* access status */ + +/* AVE_DESCC */ +#define AVE_DESCC_STATUS_MASK GENMASK(31, 16) +#define AVE_DESCC_RD0 BIT(8) /* Enable Rx descriptor Ring0 */ +#define AVE_DESCC_RDSTP BIT(4) /* Pause Rx descriptor */ +#define AVE_DESCC_TD BIT(0) /* Enable Tx descriptor */ + +/* AVE_TXDC */ +#define AVE_TXDC_SIZE GENMASK(27, 16) /* Size of Tx descriptor */ +#define AVE_TXDC_ADDR GENMASK(11, 0) /* Start address */ +#define AVE_TXDC_ADDR_START 0 + +/* AVE_RXDC0 */ +#define AVE_RXDC0_SIZE GENMASK(30, 16) /* Size of Rx descriptor */ +#define AVE_RXDC0_ADDR GENMASK(14, 0) /* Start address */ +#define AVE_RXDC0_ADDR_START 0 + +/* AVE_IIRQC */ +#define AVE_IIRQC_EN0 BIT(27) /* Enable interval interrupt Ring0 */ +#define AVE_IIRQC_BSCK GENMASK(15, 0) /* Interval count unit */ + +/* Command status for descriptor */ +#define AVE_STS_OWN BIT(31) /* Descriptor ownership */ +#define AVE_STS_INTR BIT(29) /* Request for interrupt */ +#define AVE_STS_OK BIT(27) /* Normal transmit */ +/* TX */ +#define AVE_STS_NOCSUM BIT(28) /* No use HW checksum */ +#define AVE_STS_1ST BIT(26) /* Head of buffer chain */ +#define AVE_STS_LAST BIT(25) /* Tail of buffer chain */ +#define AVE_STS_OWC BIT(21) /* Out of window,Late Collision */ +#define AVE_STS_EC BIT(20) /* Excess collision occurred */ +#define AVE_STS_PKTLEN_TX_MASK GENMASK(15, 0) +/* RX */ +#define AVE_STS_CSSV BIT(21) /* Checksum check performed */ +#define AVE_STS_CSER BIT(20) /* Checksum error detected */ +#define AVE_STS_PKTLEN_RX_MASK GENMASK(10, 0) + +/* Packet filter */ +#define AVE_PFMBYTE_MASK0 (GENMASK(31, 8) | GENMASK(5, 0)) +#define AVE_PFMBYTE_MASK1 GENMASK(25, 0) +#define AVE_PFMBIT_MASK GENMASK(15, 0) + +#define AVE_PF_SIZE 17 /* Number of all packet filter */ +#define AVE_PF_MULTICAST_SIZE 7 /* Number of multicast filter */ + +#define AVE_PFNUM_FILTER 0 /* No.0 */ +#define AVE_PFNUM_UNICAST 1 /* No.1 */ +#define AVE_PFNUM_BROADCAST 2 /* No.2 */ +#define AVE_PFNUM_MULTICAST 11 /* No.11-17 */ + +/* NETIF Message control */ +#define AVE_DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | \ + NETIF_MSG_PROBE | \ + NETIF_MSG_LINK | \ + NETIF_MSG_TIMER | \ + NETIF_MSG_IFDOWN | \ + NETIF_MSG_IFUP | \ + NETIF_MSG_RX_ERR | \ + NETIF_MSG_TX_ERR) + +/* Parameter for descriptor */ +#define AVE_NR_TXDESC 32 /* Tx descriptor */ +#define AVE_NR_RXDESC 64 /* Rx descriptor */ + +#define AVE_DESC_OFS_CMDSTS 0 +#define AVE_DESC_OFS_ADDRL 4 +#define AVE_DESC_OFS_ADDRU 8 + +/* Parameter for ethernet frame */ +#define AVE_MAX_ETHFRAME 1518 + +/* Parameter for interrupt */ +#define AVE_INTM_COUNT 20 +#define AVE_FORCE_TXINTCNT 1 + +#define IS_DESC_64BIT(p) ((p)->data->is_desc_64bit) + +enum desc_id { + AVE_DESCID_RX, + AVE_DESCID_TX, +}; + +enum desc_state { + AVE_DESC_RX_PERMIT, + AVE_DESC_RX_SUSPEND, + AVE_DESC_START, + AVE_DESC_STOP, +}; + +struct ave_desc { + struct sk_buff *skbs; + dma_addr_t skbs_dma; + size_t skbs_dmalen; +}; + +struct ave_desc_info { + u32 ndesc; /* number of descriptor */ + u32 daddr; /* start address of descriptor */ + u32 proc_idx; /* index of processing packet */ + u32 done_idx; /* index of processed packet */ + struct ave_desc *desc; /* skb info related descriptor */ +}; + +struct ave_soc_data { + bool is_desc_64bit; +}; + +struct ave_stats { + struct u64_stats_sync syncp; + u64 packets; + u64 bytes; + u64 errors; + u64 dropped; + u64 collisions; + u64 fifo_errors; +}; + +struct ave_private { + void __iomem *base; + int irq; + int phy_id; + unsigned int desc_size; + u32 msg_enable; + struct clk *clk; + struct reset_control *rst; + phy_interface_t phy_mode; + struct phy_device *phydev; + struct mii_bus *mdio; + + /* stats */ + struct ave_stats stats_rx; + struct ave_stats stats_tx; + + /* NAPI support */ + struct net_device *ndev; + struct napi_struct napi_rx; + struct napi_struct napi_tx; + + /* descriptor */ + struct ave_desc_info rx; + struct ave_desc_info tx; + + /* flow control */ + int pause_auto; + int pause_rx; + int pause_tx; + + const struct ave_soc_data *data; +}; + +static u32 ave_desc_read(struct net_device *ndev, enum desc_id id, int entry, + int offset) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 addr; + + addr = ((id == AVE_DESCID_TX) ? priv->tx.daddr : priv->rx.daddr) + + entry * priv->desc_size + offset; + + return readl(priv->base + addr); +} + +static u32 ave_desc_read_cmdsts(struct net_device *ndev, enum desc_id id, + int entry) +{ + return ave_desc_read(ndev, id, entry, AVE_DESC_OFS_CMDSTS); +} + +static void ave_desc_write(struct net_device *ndev, enum desc_id id, + int entry, int offset, u32 val) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 addr; + + addr = ((id == AVE_DESCID_TX) ? priv->tx.daddr : priv->rx.daddr) + + entry * priv->desc_size + offset; + + writel(val, priv->base + addr); +} + +static void ave_desc_write_cmdsts(struct net_device *ndev, enum desc_id id, + int entry, u32 val) +{ + ave_desc_write(ndev, id, entry, AVE_DESC_OFS_CMDSTS, val); +} + +static void ave_desc_write_addr(struct net_device *ndev, enum desc_id id, + int entry, dma_addr_t paddr) +{ + struct ave_private *priv = netdev_priv(ndev); + + ave_desc_write(ndev, id, entry, AVE_DESC_OFS_ADDRL, + lower_32_bits(paddr)); + if (IS_DESC_64BIT(priv)) + ave_desc_write(ndev, id, + entry, AVE_DESC_OFS_ADDRU, + upper_32_bits(paddr)); +} + +static u32 ave_irq_disable_all(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 ret; + + ret = readl(priv->base + AVE_GIMR); + writel(0, priv->base + AVE_GIMR); + + return ret; +} + +static void ave_irq_restore(struct net_device *ndev, u32 val) +{ + struct ave_private *priv = netdev_priv(ndev); + + writel(val, priv->base + AVE_GIMR); +} + +static void ave_irq_enable(struct net_device *ndev, u32 bitflag) +{ + struct ave_private *priv = netdev_priv(ndev); + + writel(readl(priv->base + AVE_GIMR) | bitflag, priv->base + AVE_GIMR); + writel(bitflag, priv->base + AVE_GISR); +} + +static void ave_hw_write_macaddr(struct net_device *ndev, + const unsigned char *mac_addr, + int reg1, int reg2) +{ + struct ave_private *priv = netdev_priv(ndev); + + writel(mac_addr[0] | mac_addr[1] << 8 | + mac_addr[2] << 16 | mac_addr[3] << 24, priv->base + reg1); + writel(mac_addr[4] | mac_addr[5] << 8, priv->base + reg2); +} + +static void ave_hw_read_version(struct net_device *ndev, char *buf, int len) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 major, minor, vr; + + vr = readl(priv->base + AVE_VR); + major = (vr & GENMASK(15, 8)) >> 8; + minor = (vr & GENMASK(7, 0)); + snprintf(buf, len, "v%u.%u", major, minor); +} + +static void ave_ethtool_get_drvinfo(struct net_device *ndev, + struct ethtool_drvinfo *info) +{ + struct device *dev = ndev->dev.parent; + + strlcpy(info->driver, dev->driver->name, sizeof(info->driver)); + strlcpy(info->bus_info, dev_name(dev), sizeof(info->bus_info)); + ave_hw_read_version(ndev, info->fw_version, sizeof(info->fw_version)); +} + +static u32 ave_ethtool_get_msglevel(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + + return priv->msg_enable; +} + +static void ave_ethtool_set_msglevel(struct net_device *ndev, u32 val) +{ + struct ave_private *priv = netdev_priv(ndev); + + priv->msg_enable = val; +} + +static void ave_ethtool_get_wol(struct net_device *ndev, + struct ethtool_wolinfo *wol) +{ + wol->supported = 0; + wol->wolopts = 0; + + if (ndev->phydev) + phy_ethtool_get_wol(ndev->phydev, wol); +} + +static int ave_ethtool_set_wol(struct net_device *ndev, + struct ethtool_wolinfo *wol) +{ + int ret; + + if (!ndev->phydev || + (wol->wolopts & (WAKE_ARP | WAKE_MAGICSECURE))) + return -EOPNOTSUPP; + + ret = phy_ethtool_set_wol(ndev->phydev, wol); + if (!ret) + device_set_wakeup_enable(&ndev->dev, !!wol->wolopts); + + return ret; +} + +static void ave_ethtool_get_pauseparam(struct net_device *ndev, + struct ethtool_pauseparam *pause) +{ + struct ave_private *priv = netdev_priv(ndev); + + pause->autoneg = priv->pause_auto; + pause->rx_pause = priv->pause_rx; + pause->tx_pause = priv->pause_tx; +} + +static int ave_ethtool_set_pauseparam(struct net_device *ndev, + struct ethtool_pauseparam *pause) +{ + struct ave_private *priv = netdev_priv(ndev); + struct phy_device *phydev = ndev->phydev; + + if (!phydev) + return -EINVAL; + + priv->pause_auto = pause->autoneg; + priv->pause_rx = pause->rx_pause; + priv->pause_tx = pause->tx_pause; + + phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause); + if (pause->rx_pause) + phydev->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; + if (pause->tx_pause) + phydev->advertising ^= ADVERTISED_Asym_Pause; + + if (pause->autoneg) { + if (netif_running(ndev)) + phy_start_aneg(phydev); + } + + return 0; +} + +static const struct ethtool_ops ave_ethtool_ops = { + .get_link_ksettings = phy_ethtool_get_link_ksettings, + .set_link_ksettings = phy_ethtool_set_link_ksettings, + .get_drvinfo = ave_ethtool_get_drvinfo, + .nway_reset = phy_ethtool_nway_reset, + .get_link = ethtool_op_get_link, + .get_msglevel = ave_ethtool_get_msglevel, + .set_msglevel = ave_ethtool_set_msglevel, + .get_wol = ave_ethtool_get_wol, + .set_wol = ave_ethtool_set_wol, + .get_pauseparam = ave_ethtool_get_pauseparam, + .set_pauseparam = ave_ethtool_set_pauseparam, +}; + +static int ave_mdiobus_read(struct mii_bus *bus, int phyid, int regnum) +{ + struct net_device *ndev = bus->priv; + struct ave_private *priv; + u32 mdioctl, mdiosr; + int ret; + + priv = netdev_priv(ndev); + + /* write address */ + writel((phyid << 8) | regnum, priv->base + AVE_MDIOAR); + + /* read request */ + mdioctl = readl(priv->base + AVE_MDIOCTR); + writel((mdioctl | AVE_MDIOCTR_RREQ) & ~AVE_MDIOCTR_WREQ, + priv->base + AVE_MDIOCTR); + + ret = readl_poll_timeout(priv->base + AVE_MDIOSR, mdiosr, + !(mdiosr & AVE_MDIOSR_STS), 20, 2000); + if (ret) { + netdev_err(ndev, "failed to read (phy:%d reg:%x)\n", + phyid, regnum); + return ret; + } + + return readl(priv->base + AVE_MDIORDR) & GENMASK(15, 0); +} + +static int ave_mdiobus_write(struct mii_bus *bus, int phyid, int regnum, + u16 val) +{ + struct net_device *ndev = bus->priv; + struct ave_private *priv; + u32 mdioctl, mdiosr; + int ret; + + priv = netdev_priv(ndev); + + /* write address */ + writel((phyid << 8) | regnum, priv->base + AVE_MDIOAR); + + /* write data */ + writel(val, priv->base + AVE_MDIOWDR); + + /* write request */ + mdioctl = readl(priv->base + AVE_MDIOCTR); + writel((mdioctl | AVE_MDIOCTR_WREQ) & ~AVE_MDIOCTR_RREQ, + priv->base + AVE_MDIOCTR); + + ret = readl_poll_timeout(priv->base + AVE_MDIOSR, mdiosr, + !(mdiosr & AVE_MDIOSR_STS), 20, 2000); + if (ret) + netdev_err(ndev, "failed to write (phy:%d reg:%x)\n", + phyid, regnum); + + return ret; +} + +static int ave_dma_map(struct net_device *ndev, struct ave_desc *desc, + void *ptr, size_t len, enum dma_data_direction dir, + dma_addr_t *paddr) +{ + dma_addr_t map_addr; + + map_addr = dma_map_single(ndev->dev.parent, ptr, len, dir); + if (unlikely(dma_mapping_error(ndev->dev.parent, map_addr))) + return -ENOMEM; + + desc->skbs_dma = map_addr; + desc->skbs_dmalen = len; + *paddr = map_addr; + + return 0; +} + +static void ave_dma_unmap(struct net_device *ndev, struct ave_desc *desc, + enum dma_data_direction dir) +{ + if (!desc->skbs_dma) + return; + + dma_unmap_single(ndev->dev.parent, + desc->skbs_dma, desc->skbs_dmalen, dir); + desc->skbs_dma = 0; +} + +/* Prepare Rx descriptor and memory */ +static int ave_rxdesc_prepare(struct net_device *ndev, int entry) +{ + struct ave_private *priv = netdev_priv(ndev); + struct sk_buff *skb; + dma_addr_t paddr; + int ret; + + skb = priv->rx.desc[entry].skbs; + if (!skb) { + skb = netdev_alloc_skb_ip_align(ndev, + AVE_MAX_ETHFRAME); + if (!skb) { + netdev_err(ndev, "can't allocate skb for Rx\n"); + return -ENOMEM; + } + } + + /* set disable to cmdsts */ + ave_desc_write_cmdsts(ndev, AVE_DESCID_RX, entry, + AVE_STS_INTR | AVE_STS_OWN); + + /* map Rx buffer + * Rx buffer set to the Rx descriptor has two restrictions: + * - Rx buffer address is 4 byte aligned. + * - Rx buffer begins with 2 byte headroom, and data will be put from + * (buffer + 2). + * To satisfy this, specify the address to put back the buffer + * pointer advanced by NET_IP_ALIGN by netdev_alloc_skb_ip_align(), + * and expand the map size by NET_IP_ALIGN. + */ + ret = ave_dma_map(ndev, &priv->rx.desc[entry], + skb->data - NET_IP_ALIGN, + AVE_MAX_ETHFRAME + NET_IP_ALIGN, + DMA_FROM_DEVICE, &paddr); + if (ret) { + netdev_err(ndev, "can't map skb for Rx\n"); + dev_kfree_skb_any(skb); + return ret; + } + priv->rx.desc[entry].skbs = skb; + + /* set buffer pointer */ + ave_desc_write_addr(ndev, AVE_DESCID_RX, entry, paddr); + + /* set enable to cmdsts */ + ave_desc_write_cmdsts(ndev, AVE_DESCID_RX, entry, + AVE_STS_INTR | AVE_MAX_ETHFRAME); + + return ret; +} + +/* Switch state of descriptor */ +static int ave_desc_switch(struct net_device *ndev, enum desc_state state) +{ + struct ave_private *priv = netdev_priv(ndev); + int ret = 0; + u32 val; + + switch (state) { + case AVE_DESC_START: + writel(AVE_DESCC_TD | AVE_DESCC_RD0, priv->base + AVE_DESCC); + break; + + case AVE_DESC_STOP: + writel(0, priv->base + AVE_DESCC); + if (readl_poll_timeout(priv->base + AVE_DESCC, val, !val, + 150, 15000)) { + netdev_err(ndev, "can't stop descriptor\n"); + ret = -EBUSY; + } + break; + + case AVE_DESC_RX_SUSPEND: + val = readl(priv->base + AVE_DESCC); + val |= AVE_DESCC_RDSTP; + val &= ~AVE_DESCC_STATUS_MASK; + writel(val, priv->base + AVE_DESCC); + if (readl_poll_timeout(priv->base + AVE_DESCC, val, + val & (AVE_DESCC_RDSTP << 16), + 150, 150000)) { + netdev_err(ndev, "can't suspend descriptor\n"); + ret = -EBUSY; + } + break; + + case AVE_DESC_RX_PERMIT: + val = readl(priv->base + AVE_DESCC); + val &= ~AVE_DESCC_RDSTP; + val &= ~AVE_DESCC_STATUS_MASK; + writel(val, priv->base + AVE_DESCC); + break; + + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static int ave_tx_complete(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 proc_idx, done_idx, ndesc, cmdsts; + unsigned int nr_freebuf = 0; + unsigned int tx_packets = 0; + unsigned int tx_bytes = 0; + + proc_idx = priv->tx.proc_idx; + done_idx = priv->tx.done_idx; + ndesc = priv->tx.ndesc; + + /* free pre-stored skb from done_idx to proc_idx */ + while (proc_idx != done_idx) { + cmdsts = ave_desc_read_cmdsts(ndev, AVE_DESCID_TX, done_idx); + + /* do nothing if owner is HW (==1 for Tx) */ + if (cmdsts & AVE_STS_OWN) + break; + + /* check Tx status and updates statistics */ + if (cmdsts & AVE_STS_OK) { + tx_bytes += cmdsts & AVE_STS_PKTLEN_TX_MASK; + /* success */ + if (cmdsts & AVE_STS_LAST) + tx_packets++; + } else { + /* error */ + if (cmdsts & AVE_STS_LAST) { + priv->stats_tx.errors++; + if (cmdsts & (AVE_STS_OWC | AVE_STS_EC)) + priv->stats_tx.collisions++; + } + } + + /* release skb */ + if (priv->tx.desc[done_idx].skbs) { + ave_dma_unmap(ndev, &priv->tx.desc[done_idx], + DMA_TO_DEVICE); + dev_consume_skb_any(priv->tx.desc[done_idx].skbs); + priv->tx.desc[done_idx].skbs = NULL; + nr_freebuf++; + } + done_idx = (done_idx + 1) % ndesc; + } + + priv->tx.done_idx = done_idx; + + /* update stats */ + u64_stats_update_begin(&priv->stats_tx.syncp); + priv->stats_tx.packets += tx_packets; + priv->stats_tx.bytes += tx_bytes; + u64_stats_update_end(&priv->stats_tx.syncp); + + /* wake queue for freeing buffer */ + if (unlikely(netif_queue_stopped(ndev)) && nr_freebuf) + netif_wake_queue(ndev); + + return nr_freebuf; +} + +static int ave_rx_receive(struct net_device *ndev, int num) +{ + struct ave_private *priv = netdev_priv(ndev); + unsigned int rx_packets = 0; + unsigned int rx_bytes = 0; + u32 proc_idx, done_idx; + struct sk_buff *skb; + unsigned int pktlen; + int restpkt, npkts; + u32 ndesc, cmdsts; + + proc_idx = priv->rx.proc_idx; + done_idx = priv->rx.done_idx; + ndesc = priv->rx.ndesc; + restpkt = ((proc_idx + ndesc - 1) - done_idx) % ndesc; + + for (npkts = 0; npkts < num; npkts++) { + /* we can't receive more packet, so fill desc quickly */ + if (--restpkt < 0) + break; + + cmdsts = ave_desc_read_cmdsts(ndev, AVE_DESCID_RX, proc_idx); + + /* do nothing if owner is HW (==0 for Rx) */ + if (!(cmdsts & AVE_STS_OWN)) + break; + + if (!(cmdsts & AVE_STS_OK)) { + priv->stats_rx.errors++; + proc_idx = (proc_idx + 1) % ndesc; + continue; + } + + pktlen = cmdsts & AVE_STS_PKTLEN_RX_MASK; + + /* get skbuff for rx */ + skb = priv->rx.desc[proc_idx].skbs; + priv->rx.desc[proc_idx].skbs = NULL; + + ave_dma_unmap(ndev, &priv->rx.desc[proc_idx], DMA_FROM_DEVICE); + + skb->dev = ndev; + skb_put(skb, pktlen); + skb->protocol = eth_type_trans(skb, ndev); + + if ((cmdsts & AVE_STS_CSSV) && (!(cmdsts & AVE_STS_CSER))) + skb->ip_summed = CHECKSUM_UNNECESSARY; + + rx_packets++; + rx_bytes += pktlen; + + netif_receive_skb(skb); + + proc_idx = (proc_idx + 1) % ndesc; + } + + priv->rx.proc_idx = proc_idx; + + /* update stats */ + u64_stats_update_begin(&priv->stats_rx.syncp); + priv->stats_rx.packets += rx_packets; + priv->stats_rx.bytes += rx_bytes; + u64_stats_update_end(&priv->stats_rx.syncp); + + /* refill the Rx buffers */ + while (proc_idx != done_idx) { + if (ave_rxdesc_prepare(ndev, done_idx)) + break; + done_idx = (done_idx + 1) % ndesc; + } + + priv->rx.done_idx = done_idx; + + return npkts; +} + +static int ave_napi_poll_rx(struct napi_struct *napi, int budget) +{ + struct ave_private *priv; + struct net_device *ndev; + int num; + + priv = container_of(napi, struct ave_private, napi_rx); + ndev = priv->ndev; + + num = ave_rx_receive(ndev, budget); + if (num < budget) { + napi_complete_done(napi, num); + + /* enable Rx interrupt when NAPI finishes */ + ave_irq_enable(ndev, AVE_GI_RXIINT); + } + + return num; +} + +static int ave_napi_poll_tx(struct napi_struct *napi, int budget) +{ + struct ave_private *priv; + struct net_device *ndev; + int num; + + priv = container_of(napi, struct ave_private, napi_tx); + ndev = priv->ndev; + + num = ave_tx_complete(ndev); + napi_complete(napi); + + /* enable Tx interrupt when NAPI finishes */ + ave_irq_enable(ndev, AVE_GI_TX); + + return num; +} + +static void ave_global_reset(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 val; + + /* set config register */ + val = AVE_CFGR_FLE | AVE_CFGR_IPFCEN | AVE_CFGR_CHE; + if (!phy_interface_mode_is_rgmii(priv->phy_mode)) + val |= AVE_CFGR_MII; + writel(val, priv->base + AVE_CFGR); + + /* reset RMII register */ + val = readl(priv->base + AVE_RSTCTRL); + val &= ~AVE_RSTCTRL_RMIIRST; + writel(val, priv->base + AVE_RSTCTRL); + + /* assert reset */ + writel(AVE_GRR_GRST | AVE_GRR_PHYRST, priv->base + AVE_GRR); + msleep(20); + + /* 1st, negate PHY reset only */ + writel(AVE_GRR_GRST, priv->base + AVE_GRR); + msleep(40); + + /* negate reset */ + writel(0, priv->base + AVE_GRR); + msleep(40); + + /* negate RMII register */ + val = readl(priv->base + AVE_RSTCTRL); + val |= AVE_RSTCTRL_RMIIRST; + writel(val, priv->base + AVE_RSTCTRL); + + ave_irq_disable_all(ndev); +} + +static void ave_rxfifo_reset(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 rxcr_org; + + /* save and disable MAC receive op */ + rxcr_org = readl(priv->base + AVE_RXCR); + writel(rxcr_org & (~AVE_RXCR_RXEN), priv->base + AVE_RXCR); + + /* suspend Rx descriptor */ + ave_desc_switch(ndev, AVE_DESC_RX_SUSPEND); + + /* receive all packets before descriptor starts */ + ave_rx_receive(ndev, priv->rx.ndesc); + + /* assert reset */ + writel(AVE_GRR_RXFFR, priv->base + AVE_GRR); + usleep_range(40, 50); + + /* negate reset */ + writel(0, priv->base + AVE_GRR); + usleep_range(10, 20); + + /* negate interrupt status */ + writel(AVE_GI_RXOVF, priv->base + AVE_GISR); + + /* permit descriptor */ + ave_desc_switch(ndev, AVE_DESC_RX_PERMIT); + + /* restore MAC reccieve op */ + writel(rxcr_org, priv->base + AVE_RXCR); +} + +static irqreturn_t ave_irq_handler(int irq, void *netdev) +{ + struct net_device *ndev = (struct net_device *)netdev; + struct ave_private *priv = netdev_priv(ndev); + u32 gimr_val, gisr_val; + + gimr_val = ave_irq_disable_all(ndev); + + /* get interrupt status */ + gisr_val = readl(priv->base + AVE_GISR); + + /* PHY */ + if (gisr_val & AVE_GI_PHY) + writel(AVE_GI_PHY, priv->base + AVE_GISR); + + /* check exceeding packet */ + if (gisr_val & AVE_GI_RXERR) { + writel(AVE_GI_RXERR, priv->base + AVE_GISR); + netdev_err(ndev, "receive a packet exceeding frame buffer\n"); + } + + gisr_val &= gimr_val; + if (!gisr_val) + goto exit_isr; + + /* RxFIFO overflow */ + if (gisr_val & AVE_GI_RXOVF) { + priv->stats_rx.fifo_errors++; + ave_rxfifo_reset(ndev); + goto exit_isr; + } + + /* Rx drop */ + if (gisr_val & AVE_GI_RXDROP) { + priv->stats_rx.dropped++; + writel(AVE_GI_RXDROP, priv->base + AVE_GISR); + } + + /* Rx interval */ + if (gisr_val & AVE_GI_RXIINT) { + napi_schedule(&priv->napi_rx); + /* still force to disable Rx interrupt until NAPI finishes */ + gimr_val &= ~AVE_GI_RXIINT; + } + + /* Tx completed */ + if (gisr_val & AVE_GI_TX) { + napi_schedule(&priv->napi_tx); + /* still force to disable Tx interrupt until NAPI finishes */ + gimr_val &= ~AVE_GI_TX; + } + +exit_isr: + ave_irq_restore(ndev, gimr_val); + + return IRQ_HANDLED; +} + +static int ave_pfsel_start(struct net_device *ndev, unsigned int entry) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 val; + + if (WARN_ON(entry > AVE_PF_SIZE)) + return -EINVAL; + + val = readl(priv->base + AVE_PFEN); + writel(val | BIT(entry), priv->base + AVE_PFEN); + + return 0; +} + +static int ave_pfsel_stop(struct net_device *ndev, unsigned int entry) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 val; + + if (WARN_ON(entry > AVE_PF_SIZE)) + return -EINVAL; + + val = readl(priv->base + AVE_PFEN); + writel(val & ~BIT(entry), priv->base + AVE_PFEN); + + return 0; +} + +static int ave_pfsel_set_macaddr(struct net_device *ndev, + unsigned int entry, + const unsigned char *mac_addr, + unsigned int set_size) +{ + struct ave_private *priv = netdev_priv(ndev); + + if (WARN_ON(entry > AVE_PF_SIZE)) + return -EINVAL; + if (WARN_ON(set_size > 6)) + return -EINVAL; + + ave_pfsel_stop(ndev, entry); + + /* set MAC address for the filter */ + ave_hw_write_macaddr(ndev, mac_addr, + AVE_PKTF(entry), AVE_PKTF(entry) + 4); + + /* set byte mask */ + writel(GENMASK(31, set_size) & AVE_PFMBYTE_MASK0, + priv->base + AVE_PFMBYTE(entry)); + writel(AVE_PFMBYTE_MASK1, priv->base + AVE_PFMBYTE(entry) + 4); + + /* set bit mask filter */ + writel(AVE_PFMBIT_MASK, priv->base + AVE_PFMBIT(entry)); + + /* set selector to ring 0 */ + writel(0, priv->base + AVE_PFSEL(entry)); + + /* restart filter */ + ave_pfsel_start(ndev, entry); + + return 0; +} + +static void ave_pfsel_set_promisc(struct net_device *ndev, + unsigned int entry, u32 rxring) +{ + struct ave_private *priv = netdev_priv(ndev); + + if (WARN_ON(entry > AVE_PF_SIZE)) + return; + + ave_pfsel_stop(ndev, entry); + + /* set byte mask */ + writel(AVE_PFMBYTE_MASK0, priv->base + AVE_PFMBYTE(entry)); + writel(AVE_PFMBYTE_MASK1, priv->base + AVE_PFMBYTE(entry) + 4); + + /* set bit mask filter */ + writel(AVE_PFMBIT_MASK, priv->base + AVE_PFMBIT(entry)); + + /* set selector to rxring */ + writel(rxring, priv->base + AVE_PFSEL(entry)); + + ave_pfsel_start(ndev, entry); +} + +static void ave_pfsel_init(struct net_device *ndev) +{ + unsigned char bcast_mac[ETH_ALEN]; + int i; + + eth_broadcast_addr(bcast_mac); + + for (i = 0; i < AVE_PF_SIZE; i++) + ave_pfsel_stop(ndev, i); + + /* promiscious entry, select ring 0 */ + ave_pfsel_set_promisc(ndev, AVE_PFNUM_FILTER, 0); + + /* unicast entry */ + ave_pfsel_set_macaddr(ndev, AVE_PFNUM_UNICAST, ndev->dev_addr, 6); + + /* broadcast entry */ + ave_pfsel_set_macaddr(ndev, AVE_PFNUM_BROADCAST, bcast_mac, 6); +} + +static void ave_phy_adjust_link(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + struct phy_device *phydev = ndev->phydev; + u32 val, txcr, rxcr, rxcr_org; + u16 rmt_adv = 0, lcl_adv = 0; + u8 cap; + + /* set RGMII speed */ + val = readl(priv->base + AVE_TXCR); + val &= ~(AVE_TXCR_TXSPD_100 | AVE_TXCR_TXSPD_1G); + + if (phy_interface_is_rgmii(phydev) && phydev->speed == SPEED_1000) + val |= AVE_TXCR_TXSPD_1G; + else if (phydev->speed == SPEED_100) + val |= AVE_TXCR_TXSPD_100; + + writel(val, priv->base + AVE_TXCR); + + /* set RMII speed (100M/10M only) */ + if (!phy_interface_is_rgmii(phydev)) { + val = readl(priv->base + AVE_LINKSEL); + if (phydev->speed == SPEED_10) + val &= ~AVE_LINKSEL_100M; + else + val |= AVE_LINKSEL_100M; + writel(val, priv->base + AVE_LINKSEL); + } + + /* check current RXCR/TXCR */ + rxcr = readl(priv->base + AVE_RXCR); + txcr = readl(priv->base + AVE_TXCR); + rxcr_org = rxcr; + + if (phydev->duplex) { + rxcr |= AVE_RXCR_FDUPEN; + + if (phydev->pause) + rmt_adv |= LPA_PAUSE_CAP; + if (phydev->asym_pause) + rmt_adv |= LPA_PAUSE_ASYM; + if (phydev->advertising & ADVERTISED_Pause) + lcl_adv |= ADVERTISE_PAUSE_CAP; + if (phydev->advertising & ADVERTISED_Asym_Pause) + lcl_adv |= ADVERTISE_PAUSE_ASYM; + + cap = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv); + if (cap & FLOW_CTRL_TX) + txcr |= AVE_TXCR_FLOCTR; + else + txcr &= ~AVE_TXCR_FLOCTR; + if (cap & FLOW_CTRL_RX) + rxcr |= AVE_RXCR_FLOCTR; + else + rxcr &= ~AVE_RXCR_FLOCTR; + } else { + rxcr &= ~AVE_RXCR_FDUPEN; + rxcr &= ~AVE_RXCR_FLOCTR; + txcr &= ~AVE_TXCR_FLOCTR; + } + + if (rxcr_org != rxcr) { + /* disable Rx mac */ + writel(rxcr & ~AVE_RXCR_RXEN, priv->base + AVE_RXCR); + /* change and enable TX/Rx mac */ + writel(txcr, priv->base + AVE_TXCR); + writel(rxcr, priv->base + AVE_RXCR); + } + + phy_print_status(phydev); +} + +static void ave_macaddr_init(struct net_device *ndev) +{ + ave_hw_write_macaddr(ndev, ndev->dev_addr, AVE_RXMAC1R, AVE_RXMAC2R); + + /* pfsel unicast entry */ + ave_pfsel_set_macaddr(ndev, AVE_PFNUM_UNICAST, ndev->dev_addr, 6); +} + +static int ave_init(struct net_device *ndev) +{ + struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; + struct ave_private *priv = netdev_priv(ndev); + struct device *dev = ndev->dev.parent; + struct device_node *np = dev->of_node; + struct device_node *mdio_np; + struct phy_device *phydev; + int ret; + + /* enable clk because of hw access until ndo_open */ + ret = clk_prepare_enable(priv->clk); + if (ret) { + dev_err(dev, "can't enable clock\n"); + return ret; + } + ret = reset_control_deassert(priv->rst); + if (ret) { + dev_err(dev, "can't deassert reset\n"); + goto out_clk_disable; + } + + ave_global_reset(ndev); + + mdio_np = of_get_child_by_name(np, "mdio"); + if (!mdio_np) { + dev_err(dev, "mdio node not found\n"); + ret = -EINVAL; + goto out_reset_assert; + } + ret = of_mdiobus_register(priv->mdio, mdio_np); + of_node_put(mdio_np); + if (ret) { + dev_err(dev, "failed to register mdiobus\n"); + goto out_reset_assert; + } + + phydev = of_phy_get_and_connect(ndev, np, ave_phy_adjust_link); + if (!phydev) { + dev_err(dev, "could not attach to PHY\n"); + ret = -ENODEV; + goto out_mdio_unregister; + } + + priv->phydev = phydev; + + phy_ethtool_get_wol(phydev, &wol); + device_set_wakeup_capable(&ndev->dev, !!wol.supported); + + if (!phy_interface_is_rgmii(phydev)) { + phydev->supported &= ~PHY_GBIT_FEATURES; + phydev->supported |= PHY_BASIC_FEATURES; + } + phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause; + + phy_attached_info(phydev); + + return 0; + +out_mdio_unregister: + mdiobus_unregister(priv->mdio); +out_reset_assert: + reset_control_assert(priv->rst); +out_clk_disable: + clk_disable_unprepare(priv->clk); + + return ret; +} + +static void ave_uninit(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + + phy_disconnect(priv->phydev); + mdiobus_unregister(priv->mdio); + + /* disable clk because of hw access after ndo_stop */ + reset_control_assert(priv->rst); + clk_disable_unprepare(priv->clk); +} + +static int ave_open(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + int entry; + int ret; + u32 val; + + ret = request_irq(priv->irq, ave_irq_handler, IRQF_SHARED, ndev->name, + ndev); + if (ret) + return ret; + + priv->tx.desc = kcalloc(priv->tx.ndesc, sizeof(*priv->tx.desc), + GFP_KERNEL); + if (!priv->tx.desc) { + ret = -ENOMEM; + goto out_free_irq; + } + + priv->rx.desc = kcalloc(priv->rx.ndesc, sizeof(*priv->rx.desc), + GFP_KERNEL); + if (!priv->rx.desc) { + kfree(priv->tx.desc); + ret = -ENOMEM; + goto out_free_irq; + } + + /* initialize Tx work and descriptor */ + priv->tx.proc_idx = 0; + priv->tx.done_idx = 0; + for (entry = 0; entry < priv->tx.ndesc; entry++) { + ave_desc_write_cmdsts(ndev, AVE_DESCID_TX, entry, 0); + ave_desc_write_addr(ndev, AVE_DESCID_TX, entry, 0); + } + writel(AVE_TXDC_ADDR_START | + (((priv->tx.ndesc * priv->desc_size) << 16) & AVE_TXDC_SIZE), + priv->base + AVE_TXDC); + + /* initialize Rx work and descriptor */ + priv->rx.proc_idx = 0; + priv->rx.done_idx = 0; + for (entry = 0; entry < priv->rx.ndesc; entry++) { + if (ave_rxdesc_prepare(ndev, entry)) + break; + } + writel(AVE_RXDC0_ADDR_START | + (((priv->rx.ndesc * priv->desc_size) << 16) & AVE_RXDC0_SIZE), + priv->base + AVE_RXDC0); + + ave_desc_switch(ndev, AVE_DESC_START); + + ave_pfsel_init(ndev); + ave_macaddr_init(ndev); + + /* set Rx configuration */ + /* full duplex, enable pause drop, enalbe flow control */ + val = AVE_RXCR_RXEN | AVE_RXCR_FDUPEN | AVE_RXCR_DRPEN | + AVE_RXCR_FLOCTR | (AVE_MAX_ETHFRAME & AVE_RXCR_MPSIZ_MASK); + writel(val, priv->base + AVE_RXCR); + + /* set Tx configuration */ + /* enable flow control, disable loopback */ + writel(AVE_TXCR_FLOCTR, priv->base + AVE_TXCR); + + /* enable timer, clear EN,INTM, and mask interval unit(BSCK) */ + val = readl(priv->base + AVE_IIRQC) & AVE_IIRQC_BSCK; + val |= AVE_IIRQC_EN0 | (AVE_INTM_COUNT << 16); + writel(val, priv->base + AVE_IIRQC); + + val = AVE_GI_RXIINT | AVE_GI_RXOVF | AVE_GI_TX; + ave_irq_restore(ndev, val); + + napi_enable(&priv->napi_rx); + napi_enable(&priv->napi_tx); + + phy_start(ndev->phydev); + phy_start_aneg(ndev->phydev); + netif_start_queue(ndev); + + return 0; + +out_free_irq: + disable_irq(priv->irq); + free_irq(priv->irq, ndev); + + return ret; +} + +static int ave_stop(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + int entry; + + ave_irq_disable_all(ndev); + disable_irq(priv->irq); + free_irq(priv->irq, ndev); + + netif_tx_disable(ndev); + phy_stop(ndev->phydev); + napi_disable(&priv->napi_tx); + napi_disable(&priv->napi_rx); + + ave_desc_switch(ndev, AVE_DESC_STOP); + + /* free Tx buffer */ + for (entry = 0; entry < priv->tx.ndesc; entry++) { + if (!priv->tx.desc[entry].skbs) + continue; + + ave_dma_unmap(ndev, &priv->tx.desc[entry], DMA_TO_DEVICE); + dev_kfree_skb_any(priv->tx.desc[entry].skbs); + priv->tx.desc[entry].skbs = NULL; + } + priv->tx.proc_idx = 0; + priv->tx.done_idx = 0; + + /* free Rx buffer */ + for (entry = 0; entry < priv->rx.ndesc; entry++) { + if (!priv->rx.desc[entry].skbs) + continue; + + ave_dma_unmap(ndev, &priv->rx.desc[entry], DMA_FROM_DEVICE); + dev_kfree_skb_any(priv->rx.desc[entry].skbs); + priv->rx.desc[entry].skbs = NULL; + } + priv->rx.proc_idx = 0; + priv->rx.done_idx = 0; + + kfree(priv->tx.desc); + kfree(priv->rx.desc); + + return 0; +} + +static int ave_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + u32 proc_idx, done_idx, ndesc, cmdsts; + int ret, freepkt; + dma_addr_t paddr; + + proc_idx = priv->tx.proc_idx; + done_idx = priv->tx.done_idx; + ndesc = priv->tx.ndesc; + freepkt = ((done_idx + ndesc - 1) - proc_idx) % ndesc; + + /* stop queue when not enough entry */ + if (unlikely(freepkt < 1)) { + netif_stop_queue(ndev); + return NETDEV_TX_BUSY; + } + + /* add padding for short packet */ + if (skb_put_padto(skb, ETH_ZLEN)) { + priv->stats_tx.dropped++; + return NETDEV_TX_OK; + } + + /* map Tx buffer + * Tx buffer set to the Tx descriptor doesn't have any restriction. + */ + ret = ave_dma_map(ndev, &priv->tx.desc[proc_idx], + skb->data, skb->len, DMA_TO_DEVICE, &paddr); + if (ret) { + dev_kfree_skb_any(skb); + priv->stats_tx.dropped++; + return NETDEV_TX_OK; + } + + priv->tx.desc[proc_idx].skbs = skb; + + ave_desc_write_addr(ndev, AVE_DESCID_TX, proc_idx, paddr); + + cmdsts = AVE_STS_OWN | AVE_STS_1ST | AVE_STS_LAST | + (skb->len & AVE_STS_PKTLEN_TX_MASK); + + /* set interrupt per AVE_FORCE_TXINTCNT or when queue is stopped */ + if (!(proc_idx % AVE_FORCE_TXINTCNT) || netif_queue_stopped(ndev)) + cmdsts |= AVE_STS_INTR; + + /* disable checksum calculation when skb doesn't calurate checksum */ + if (skb->ip_summed == CHECKSUM_NONE || + skb->ip_summed == CHECKSUM_UNNECESSARY) + cmdsts |= AVE_STS_NOCSUM; + + ave_desc_write_cmdsts(ndev, AVE_DESCID_TX, proc_idx, cmdsts); + + priv->tx.proc_idx = (proc_idx + 1) % ndesc; + + return NETDEV_TX_OK; +} + +static int ave_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd) +{ + return phy_mii_ioctl(ndev->phydev, ifr, cmd); +} + +static const u8 v4multi_macadr[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 }; +static const u8 v6multi_macadr[] = { 0x33, 0x00, 0x00, 0x00, 0x00, 0x00 }; + +static void ave_set_rx_mode(struct net_device *ndev) +{ + struct ave_private *priv = netdev_priv(ndev); + struct netdev_hw_addr *hw_adr; + int count, mc_cnt; + u32 val; + + /* MAC addr filter enable for promiscious mode */ + mc_cnt = netdev_mc_count(ndev); + val = readl(priv->base + AVE_RXCR); + if (ndev->flags & IFF_PROMISC || !mc_cnt) + val &= ~AVE_RXCR_AFEN; + else + val |= AVE_RXCR_AFEN; + writel(val, priv->base + AVE_RXCR); + + /* set all multicast address */ + if ((ndev->flags & IFF_ALLMULTI) || mc_cnt > AVE_PF_MULTICAST_SIZE) { + ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST, + v4multi_macadr, 1); + ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST + 1, + v6multi_macadr, 1); + } else { + /* stop all multicast filter */ + for (count = 0; count < AVE_PF_MULTICAST_SIZE; count++) + ave_pfsel_stop(ndev, AVE_PFNUM_MULTICAST + count); + + /* set multicast addresses */ + count = 0; + netdev_for_each_mc_addr(hw_adr, ndev) { + if (count == mc_cnt) + break; + ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST + count, + hw_adr->addr, 6); + count++; + } + } +} + +static void ave_get_stats64(struct net_device *ndev, + struct rtnl_link_stats64 *stats) +{ + struct ave_private *priv = netdev_priv(ndev); + unsigned int start; + + do { + start = u64_stats_fetch_begin_irq(&priv->stats_rx.syncp); + stats->rx_packets = priv->stats_rx.packets; + stats->rx_bytes = priv->stats_rx.bytes; + } while (u64_stats_fetch_retry_irq(&priv->stats_rx.syncp, start)); + + do { + start = u64_stats_fetch_begin_irq(&priv->stats_tx.syncp); + stats->tx_packets = priv->stats_tx.packets; + stats->tx_bytes = priv->stats_tx.bytes; + } while (u64_stats_fetch_retry_irq(&priv->stats_tx.syncp, start)); + + stats->rx_errors = priv->stats_rx.errors; + stats->tx_errors = priv->stats_tx.errors; + stats->rx_dropped = priv->stats_rx.dropped; + stats->tx_dropped = priv->stats_tx.dropped; + stats->rx_fifo_errors = priv->stats_rx.fifo_errors; + stats->collisions = priv->stats_tx.collisions; +} + +static int ave_set_mac_address(struct net_device *ndev, void *p) +{ + int ret = eth_mac_addr(ndev, p); + + if (ret) + return ret; + + ave_macaddr_init(ndev); + + return 0; +} + +static const struct net_device_ops ave_netdev_ops = { + .ndo_init = ave_init, + .ndo_uninit = ave_uninit, + .ndo_open = ave_open, + .ndo_stop = ave_stop, + .ndo_start_xmit = ave_start_xmit, + .ndo_do_ioctl = ave_ioctl, + .ndo_set_rx_mode = ave_set_rx_mode, + .ndo_get_stats64 = ave_get_stats64, + .ndo_set_mac_address = ave_set_mac_address, +}; + +static int ave_probe(struct platform_device *pdev) +{ + const struct ave_soc_data *data; + struct device *dev = &pdev->dev; + char buf[ETHTOOL_FWVERS_LEN]; + phy_interface_t phy_mode; + struct ave_private *priv; + struct net_device *ndev; + struct device_node *np; + struct resource *res; + const void *mac_addr; + void __iomem *base; + u64 dma_mask; + int irq, ret; + u32 ave_id; + + data = of_device_get_match_data(dev); + if (WARN_ON(!data)) + return -EINVAL; + + np = dev->of_node; + phy_mode = of_get_phy_mode(np); + if (phy_mode < 0) { + dev_err(dev, "phy-mode not found\n"); + return -EINVAL; + } + if ((!phy_interface_mode_is_rgmii(phy_mode)) && + phy_mode != PHY_INTERFACE_MODE_RMII && + phy_mode != PHY_INTERFACE_MODE_MII) { + dev_err(dev, "phy-mode is invalid\n"); + return -EINVAL; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "IRQ not found\n"); + return irq; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + ndev = alloc_etherdev(sizeof(struct ave_private)); + if (!ndev) { + dev_err(dev, "can't allocate ethernet device\n"); + return -ENOMEM; + } + + ndev->netdev_ops = &ave_netdev_ops; + ndev->ethtool_ops = &ave_ethtool_ops; + SET_NETDEV_DEV(ndev, dev); + + ndev->features |= (NETIF_F_IP_CSUM | NETIF_F_RXCSUM); + ndev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_RXCSUM); + + ndev->max_mtu = AVE_MAX_ETHFRAME - (ETH_HLEN + ETH_FCS_LEN); + + mac_addr = of_get_mac_address(np); + if (mac_addr) + ether_addr_copy(ndev->dev_addr, mac_addr); + + /* if the mac address is invalid, use random mac address */ + if (!is_valid_ether_addr(ndev->dev_addr)) { + eth_hw_addr_random(ndev); + dev_warn(dev, "Using random MAC address: %pM\n", + ndev->dev_addr); + } + + priv = netdev_priv(ndev); + priv->base = base; + priv->irq = irq; + priv->ndev = ndev; + priv->msg_enable = netif_msg_init(-1, AVE_DEFAULT_MSG_ENABLE); + priv->phy_mode = phy_mode; + priv->data = data; + + if (IS_DESC_64BIT(priv)) { + priv->desc_size = AVE_DESC_SIZE_64; + priv->tx.daddr = AVE_TXDM_64; + priv->rx.daddr = AVE_RXDM_64; + dma_mask = DMA_BIT_MASK(64); + } else { + priv->desc_size = AVE_DESC_SIZE_32; + priv->tx.daddr = AVE_TXDM_32; + priv->rx.daddr = AVE_RXDM_32; + dma_mask = DMA_BIT_MASK(32); + } + ret = dma_set_mask(dev, dma_mask); + if (ret) + goto out_free_netdev; + + priv->tx.ndesc = AVE_NR_TXDESC; + priv->rx.ndesc = AVE_NR_RXDESC; + + u64_stats_init(&priv->stats_tx.syncp); + u64_stats_init(&priv->stats_rx.syncp); + + priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(priv->clk)) { + ret = PTR_ERR(priv->clk); + goto out_free_netdev; + } + + priv->rst = devm_reset_control_get_optional_shared(dev, NULL); + if (IS_ERR(priv->rst)) { + ret = PTR_ERR(priv->rst); + goto out_free_netdev; + } + + priv->mdio = devm_mdiobus_alloc(dev); + if (!priv->mdio) { + ret = -ENOMEM; + goto out_free_netdev; + } + priv->mdio->priv = ndev; + priv->mdio->parent = dev; + priv->mdio->read = ave_mdiobus_read; + priv->mdio->write = ave_mdiobus_write; + priv->mdio->name = "uniphier-mdio"; + snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "%s-%x", + pdev->name, pdev->id); + + /* Register as a NAPI supported driver */ + netif_napi_add(ndev, &priv->napi_rx, ave_napi_poll_rx, priv->rx.ndesc); + netif_tx_napi_add(ndev, &priv->napi_tx, ave_napi_poll_tx, + priv->tx.ndesc); + + platform_set_drvdata(pdev, ndev); + + ret = register_netdev(ndev); + if (ret) { + dev_err(dev, "failed to register netdevice\n"); + goto out_del_napi; + } + + /* get ID and version */ + ave_id = readl(priv->base + AVE_IDR); + ave_hw_read_version(ndev, buf, sizeof(buf)); + + dev_info(dev, "Socionext %c%c%c%c Ethernet IP %s (irq=%d, phy=%s)\n", + (ave_id >> 24) & 0xff, (ave_id >> 16) & 0xff, + (ave_id >> 8) & 0xff, (ave_id >> 0) & 0xff, + buf, priv->irq, phy_modes(phy_mode)); + + return 0; + +out_del_napi: + netif_napi_del(&priv->napi_rx); + netif_napi_del(&priv->napi_tx); +out_free_netdev: + free_netdev(ndev); + + return ret; +} + +static int ave_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct ave_private *priv = netdev_priv(ndev); + + unregister_netdev(ndev); + netif_napi_del(&priv->napi_rx); + netif_napi_del(&priv->napi_tx); + free_netdev(ndev); + + return 0; +} + +static const struct ave_soc_data ave_pro4_data = { + .is_desc_64bit = false, +}; + +static const struct ave_soc_data ave_pxs2_data = { + .is_desc_64bit = false, +}; + +static const struct ave_soc_data ave_ld11_data = { + .is_desc_64bit = false, +}; + +static const struct ave_soc_data ave_ld20_data = { + .is_desc_64bit = true, +}; + +static const struct of_device_id of_ave_match[] = { + { + .compatible = "socionext,uniphier-pro4-ave4", + .data = &ave_pro4_data, + }, + { + .compatible = "socionext,uniphier-pxs2-ave4", + .data = &ave_pxs2_data, + }, + { + .compatible = "socionext,uniphier-ld11-ave4", + .data = &ave_ld11_data, + }, + { + .compatible = "socionext,uniphier-ld20-ave4", + .data = &ave_ld20_data, + }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_ave_match); + +static struct platform_driver ave_driver = { + .probe = ave_probe, + .remove = ave_remove, + .driver = { + .name = "ave", + .of_match_table = of_ave_match, + }, +}; +module_platform_driver(ave_driver); + +MODULE_DESCRIPTION("Socionext UniPhier AVE ethernet driver"); +MODULE_LICENSE("GPL v2"); |