forked from Minki/linux
1f6d80358d
Conflicts: arch/mips/net/bpf_jit.c drivers/net/can/flexcan.c Both the flexcan and MIPS bpf_jit conflicts were cases of simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
1966 lines
51 KiB
C
1966 lines
51 KiB
C
/*
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* Broadcom BCM7xxx System Port Ethernet MAC driver
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*
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* Copyright (C) 2014 Broadcom Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/of_mdio.h>
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#include <linux/phy.h>
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#include <linux/phy_fixed.h>
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#include <net/ip.h>
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#include <net/ipv6.h>
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#include "bcmsysport.h"
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/* I/O accessors register helpers */
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#define BCM_SYSPORT_IO_MACRO(name, offset) \
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static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \
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{ \
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u32 reg = __raw_readl(priv->base + offset + off); \
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return reg; \
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} \
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static inline void name##_writel(struct bcm_sysport_priv *priv, \
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u32 val, u32 off) \
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{ \
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__raw_writel(val, priv->base + offset + off); \
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} \
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BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
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BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
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BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
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BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
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BCM_SYSPORT_IO_MACRO(rdma, SYS_PORT_RDMA_OFFSET);
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BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
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BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
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BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
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BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
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BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
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/* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
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* mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
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*/
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#define BCM_SYSPORT_INTR_L2(which) \
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static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
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u32 mask) \
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{ \
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intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
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priv->irq##which##_mask &= ~(mask); \
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} \
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static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
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u32 mask) \
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{ \
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intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \
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priv->irq##which##_mask |= (mask); \
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} \
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BCM_SYSPORT_INTR_L2(0)
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BCM_SYSPORT_INTR_L2(1)
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/* Register accesses to GISB/RBUS registers are expensive (few hundred
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* nanoseconds), so keep the check for 64-bits explicit here to save
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* one register write per-packet on 32-bits platforms.
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*/
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static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
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void __iomem *d,
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dma_addr_t addr)
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{
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#ifdef CONFIG_PHYS_ADDR_T_64BIT
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__raw_writel(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
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d + DESC_ADDR_HI_STATUS_LEN);
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#endif
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__raw_writel(lower_32_bits(addr), d + DESC_ADDR_LO);
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}
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static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv,
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struct dma_desc *desc,
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unsigned int port)
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{
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/* Ports are latched, so write upper address first */
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tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port));
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tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port));
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}
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/* Ethtool operations */
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static int bcm_sysport_set_settings(struct net_device *dev,
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struct ethtool_cmd *cmd)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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if (!netif_running(dev))
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return -EINVAL;
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return phy_ethtool_sset(priv->phydev, cmd);
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}
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static int bcm_sysport_get_settings(struct net_device *dev,
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struct ethtool_cmd *cmd)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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if (!netif_running(dev))
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return -EINVAL;
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return phy_ethtool_gset(priv->phydev, cmd);
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}
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static int bcm_sysport_set_rx_csum(struct net_device *dev,
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netdev_features_t wanted)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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u32 reg;
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priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
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reg = rxchk_readl(priv, RXCHK_CONTROL);
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if (priv->rx_chk_en)
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reg |= RXCHK_EN;
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else
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reg &= ~RXCHK_EN;
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/* If UniMAC forwards CRC, we need to skip over it to get
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* a valid CHK bit to be set in the per-packet status word
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*/
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if (priv->rx_chk_en && priv->crc_fwd)
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reg |= RXCHK_SKIP_FCS;
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else
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reg &= ~RXCHK_SKIP_FCS;
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/* If Broadcom tags are enabled (e.g: using a switch), make
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* sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
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* tag after the Ethernet MAC Source Address.
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*/
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if (netdev_uses_dsa(dev))
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reg |= RXCHK_BRCM_TAG_EN;
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else
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reg &= ~RXCHK_BRCM_TAG_EN;
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rxchk_writel(priv, reg, RXCHK_CONTROL);
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return 0;
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}
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static int bcm_sysport_set_tx_csum(struct net_device *dev,
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netdev_features_t wanted)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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u32 reg;
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/* Hardware transmit checksum requires us to enable the Transmit status
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* block prepended to the packet contents
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*/
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priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
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reg = tdma_readl(priv, TDMA_CONTROL);
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if (priv->tsb_en)
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reg |= TSB_EN;
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else
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reg &= ~TSB_EN;
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tdma_writel(priv, reg, TDMA_CONTROL);
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return 0;
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}
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static int bcm_sysport_set_features(struct net_device *dev,
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netdev_features_t features)
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{
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netdev_features_t changed = features ^ dev->features;
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netdev_features_t wanted = dev->wanted_features;
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int ret = 0;
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if (changed & NETIF_F_RXCSUM)
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ret = bcm_sysport_set_rx_csum(dev, wanted);
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if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
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ret = bcm_sysport_set_tx_csum(dev, wanted);
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return ret;
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}
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/* Hardware counters must be kept in sync because the order/offset
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* is important here (order in structure declaration = order in hardware)
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*/
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static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
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/* general stats */
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STAT_NETDEV(rx_packets),
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STAT_NETDEV(tx_packets),
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STAT_NETDEV(rx_bytes),
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STAT_NETDEV(tx_bytes),
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STAT_NETDEV(rx_errors),
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STAT_NETDEV(tx_errors),
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STAT_NETDEV(rx_dropped),
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STAT_NETDEV(tx_dropped),
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STAT_NETDEV(multicast),
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/* UniMAC RSV counters */
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STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
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STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
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STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
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STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
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STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
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STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
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STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
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STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
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STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
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STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
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STAT_MIB_RX("rx_pkts", mib.rx.pkt),
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STAT_MIB_RX("rx_bytes", mib.rx.bytes),
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STAT_MIB_RX("rx_multicast", mib.rx.mca),
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STAT_MIB_RX("rx_broadcast", mib.rx.bca),
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STAT_MIB_RX("rx_fcs", mib.rx.fcs),
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STAT_MIB_RX("rx_control", mib.rx.cf),
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STAT_MIB_RX("rx_pause", mib.rx.pf),
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STAT_MIB_RX("rx_unknown", mib.rx.uo),
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STAT_MIB_RX("rx_align", mib.rx.aln),
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STAT_MIB_RX("rx_outrange", mib.rx.flr),
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STAT_MIB_RX("rx_code", mib.rx.cde),
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STAT_MIB_RX("rx_carrier", mib.rx.fcr),
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STAT_MIB_RX("rx_oversize", mib.rx.ovr),
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STAT_MIB_RX("rx_jabber", mib.rx.jbr),
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STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
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STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
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STAT_MIB_RX("rx_unicast", mib.rx.uc),
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STAT_MIB_RX("rx_ppp", mib.rx.ppp),
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STAT_MIB_RX("rx_crc", mib.rx.rcrc),
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/* UniMAC TSV counters */
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STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
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STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
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STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
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STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
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STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
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STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
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STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
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STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
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STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
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STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
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STAT_MIB_TX("tx_pkts", mib.tx.pkts),
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STAT_MIB_TX("tx_multicast", mib.tx.mca),
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STAT_MIB_TX("tx_broadcast", mib.tx.bca),
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STAT_MIB_TX("tx_pause", mib.tx.pf),
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STAT_MIB_TX("tx_control", mib.tx.cf),
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STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
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STAT_MIB_TX("tx_oversize", mib.tx.ovr),
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STAT_MIB_TX("tx_defer", mib.tx.drf),
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STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
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STAT_MIB_TX("tx_single_col", mib.tx.scl),
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STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
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STAT_MIB_TX("tx_late_col", mib.tx.lcl),
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STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
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STAT_MIB_TX("tx_frags", mib.tx.frg),
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STAT_MIB_TX("tx_total_col", mib.tx.ncl),
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STAT_MIB_TX("tx_jabber", mib.tx.jbr),
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STAT_MIB_TX("tx_bytes", mib.tx.bytes),
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STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
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STAT_MIB_TX("tx_unicast", mib.tx.uc),
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/* UniMAC RUNT counters */
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STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
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STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
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STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
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STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
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/* RXCHK misc statistics */
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STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
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STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
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RXCHK_OTHER_DISC_CNTR),
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/* RBUF misc statistics */
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STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
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STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
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};
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#define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats)
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static void bcm_sysport_get_drvinfo(struct net_device *dev,
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struct ethtool_drvinfo *info)
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{
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strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
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strlcpy(info->version, "0.1", sizeof(info->version));
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strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
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info->n_stats = BCM_SYSPORT_STATS_LEN;
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}
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static u32 bcm_sysport_get_msglvl(struct net_device *dev)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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return priv->msg_enable;
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}
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static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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priv->msg_enable = enable;
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}
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static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
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{
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switch (string_set) {
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case ETH_SS_STATS:
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return BCM_SYSPORT_STATS_LEN;
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default:
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return -EOPNOTSUPP;
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}
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}
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static void bcm_sysport_get_strings(struct net_device *dev,
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u32 stringset, u8 *data)
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{
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int i;
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switch (stringset) {
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case ETH_SS_STATS:
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for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
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memcpy(data + i * ETH_GSTRING_LEN,
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bcm_sysport_gstrings_stats[i].stat_string,
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ETH_GSTRING_LEN);
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}
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break;
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default:
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break;
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}
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}
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static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
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{
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int i, j = 0;
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for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
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const struct bcm_sysport_stats *s;
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u8 offset = 0;
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u32 val = 0;
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char *p;
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s = &bcm_sysport_gstrings_stats[i];
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switch (s->type) {
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case BCM_SYSPORT_STAT_NETDEV:
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continue;
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case BCM_SYSPORT_STAT_MIB_RX:
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case BCM_SYSPORT_STAT_MIB_TX:
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case BCM_SYSPORT_STAT_RUNT:
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if (s->type != BCM_SYSPORT_STAT_MIB_RX)
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offset = UMAC_MIB_STAT_OFFSET;
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val = umac_readl(priv, UMAC_MIB_START + j + offset);
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break;
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case BCM_SYSPORT_STAT_RXCHK:
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val = rxchk_readl(priv, s->reg_offset);
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if (val == ~0)
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rxchk_writel(priv, 0, s->reg_offset);
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break;
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case BCM_SYSPORT_STAT_RBUF:
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val = rbuf_readl(priv, s->reg_offset);
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if (val == ~0)
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rbuf_writel(priv, 0, s->reg_offset);
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break;
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}
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j += s->stat_sizeof;
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p = (char *)priv + s->stat_offset;
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*(u32 *)p = val;
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}
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netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
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}
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static void bcm_sysport_get_stats(struct net_device *dev,
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struct ethtool_stats *stats, u64 *data)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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int i;
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if (netif_running(dev))
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bcm_sysport_update_mib_counters(priv);
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for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
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const struct bcm_sysport_stats *s;
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char *p;
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s = &bcm_sysport_gstrings_stats[i];
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if (s->type == BCM_SYSPORT_STAT_NETDEV)
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p = (char *)&dev->stats;
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else
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p = (char *)priv;
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p += s->stat_offset;
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data[i] = *(u32 *)p;
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}
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}
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static void bcm_sysport_get_wol(struct net_device *dev,
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struct ethtool_wolinfo *wol)
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{
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struct bcm_sysport_priv *priv = netdev_priv(dev);
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u32 reg;
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wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
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wol->wolopts = priv->wolopts;
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if (!(priv->wolopts & WAKE_MAGICSECURE))
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return;
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/* Return the programmed SecureOn password */
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reg = umac_readl(priv, UMAC_PSW_MS);
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put_unaligned_be16(reg, &wol->sopass[0]);
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reg = umac_readl(priv, UMAC_PSW_LS);
|
|
put_unaligned_be32(reg, &wol->sopass[2]);
|
|
}
|
|
|
|
static int bcm_sysport_set_wol(struct net_device *dev,
|
|
struct ethtool_wolinfo *wol)
|
|
{
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
struct device *kdev = &priv->pdev->dev;
|
|
u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE;
|
|
|
|
if (!device_can_wakeup(kdev))
|
|
return -ENOTSUPP;
|
|
|
|
if (wol->wolopts & ~supported)
|
|
return -EINVAL;
|
|
|
|
/* Program the SecureOn password */
|
|
if (wol->wolopts & WAKE_MAGICSECURE) {
|
|
umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
|
|
UMAC_PSW_MS);
|
|
umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
|
|
UMAC_PSW_LS);
|
|
}
|
|
|
|
/* Flag the device and relevant IRQ as wakeup capable */
|
|
if (wol->wolopts) {
|
|
device_set_wakeup_enable(kdev, 1);
|
|
enable_irq_wake(priv->wol_irq);
|
|
priv->wol_irq_disabled = 0;
|
|
} else {
|
|
device_set_wakeup_enable(kdev, 0);
|
|
/* Avoid unbalanced disable_irq_wake calls */
|
|
if (!priv->wol_irq_disabled)
|
|
disable_irq_wake(priv->wol_irq);
|
|
priv->wol_irq_disabled = 1;
|
|
}
|
|
|
|
priv->wolopts = wol->wolopts;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
|
|
{
|
|
dev_kfree_skb_any(cb->skb);
|
|
cb->skb = NULL;
|
|
dma_unmap_addr_set(cb, dma_addr, 0);
|
|
}
|
|
|
|
static int bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
|
|
struct bcm_sysport_cb *cb)
|
|
{
|
|
struct device *kdev = &priv->pdev->dev;
|
|
struct net_device *ndev = priv->netdev;
|
|
dma_addr_t mapping;
|
|
int ret;
|
|
|
|
cb->skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
|
|
if (!cb->skb) {
|
|
netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mapping = dma_map_single(kdev, cb->skb->data,
|
|
RX_BUF_LENGTH, DMA_FROM_DEVICE);
|
|
ret = dma_mapping_error(kdev, mapping);
|
|
if (ret) {
|
|
bcm_sysport_free_cb(cb);
|
|
netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
|
|
return ret;
|
|
}
|
|
|
|
dma_unmap_addr_set(cb, dma_addr, mapping);
|
|
dma_desc_set_addr(priv, priv->rx_bd_assign_ptr, mapping);
|
|
|
|
priv->rx_bd_assign_index++;
|
|
priv->rx_bd_assign_index &= (priv->num_rx_bds - 1);
|
|
priv->rx_bd_assign_ptr = priv->rx_bds +
|
|
(priv->rx_bd_assign_index * DESC_SIZE);
|
|
|
|
netif_dbg(priv, rx_status, ndev, "RX refill\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
|
|
{
|
|
struct bcm_sysport_cb *cb;
|
|
int ret = 0;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < priv->num_rx_bds; i++) {
|
|
cb = &priv->rx_cbs[priv->rx_bd_assign_index];
|
|
if (cb->skb)
|
|
continue;
|
|
|
|
ret = bcm_sysport_rx_refill(priv, cb);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Poll the hardware for up to budget packets to process */
|
|
static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
|
|
unsigned int budget)
|
|
{
|
|
struct device *kdev = &priv->pdev->dev;
|
|
struct net_device *ndev = priv->netdev;
|
|
unsigned int processed = 0, to_process;
|
|
struct bcm_sysport_cb *cb;
|
|
struct sk_buff *skb;
|
|
unsigned int p_index;
|
|
u16 len, status;
|
|
struct bcm_rsb *rsb;
|
|
|
|
/* Determine how much we should process since last call */
|
|
p_index = rdma_readl(priv, RDMA_PROD_INDEX);
|
|
p_index &= RDMA_PROD_INDEX_MASK;
|
|
|
|
if (p_index < priv->rx_c_index)
|
|
to_process = (RDMA_CONS_INDEX_MASK + 1) -
|
|
priv->rx_c_index + p_index;
|
|
else
|
|
to_process = p_index - priv->rx_c_index;
|
|
|
|
netif_dbg(priv, rx_status, ndev,
|
|
"p_index=%d rx_c_index=%d to_process=%d\n",
|
|
p_index, priv->rx_c_index, to_process);
|
|
|
|
while ((processed < to_process) && (processed < budget)) {
|
|
cb = &priv->rx_cbs[priv->rx_read_ptr];
|
|
skb = cb->skb;
|
|
|
|
processed++;
|
|
priv->rx_read_ptr++;
|
|
|
|
if (priv->rx_read_ptr == priv->num_rx_bds)
|
|
priv->rx_read_ptr = 0;
|
|
|
|
/* We do not have a backing SKB, so we do not a corresponding
|
|
* DMA mapping for this incoming packet since
|
|
* bcm_sysport_rx_refill always either has both skb and mapping
|
|
* or none.
|
|
*/
|
|
if (unlikely(!skb)) {
|
|
netif_err(priv, rx_err, ndev, "out of memory!\n");
|
|
ndev->stats.rx_dropped++;
|
|
ndev->stats.rx_errors++;
|
|
goto refill;
|
|
}
|
|
|
|
dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
|
|
RX_BUF_LENGTH, DMA_FROM_DEVICE);
|
|
|
|
/* Extract the Receive Status Block prepended */
|
|
rsb = (struct bcm_rsb *)skb->data;
|
|
len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
|
|
status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
|
|
DESC_STATUS_MASK;
|
|
|
|
netif_dbg(priv, rx_status, ndev,
|
|
"p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
|
|
p_index, priv->rx_c_index, priv->rx_read_ptr,
|
|
len, status);
|
|
|
|
if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
|
|
netif_err(priv, rx_status, ndev, "fragmented packet!\n");
|
|
ndev->stats.rx_dropped++;
|
|
ndev->stats.rx_errors++;
|
|
bcm_sysport_free_cb(cb);
|
|
goto refill;
|
|
}
|
|
|
|
if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
|
|
netif_err(priv, rx_err, ndev, "error packet\n");
|
|
if (status & RX_STATUS_OVFLOW)
|
|
ndev->stats.rx_over_errors++;
|
|
ndev->stats.rx_dropped++;
|
|
ndev->stats.rx_errors++;
|
|
bcm_sysport_free_cb(cb);
|
|
goto refill;
|
|
}
|
|
|
|
skb_put(skb, len);
|
|
|
|
/* Hardware validated our checksum */
|
|
if (likely(status & DESC_L4_CSUM))
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
/* Hardware pre-pends packets with 2bytes before Ethernet
|
|
* header plus we have the Receive Status Block, strip off all
|
|
* of this from the SKB.
|
|
*/
|
|
skb_pull(skb, sizeof(*rsb) + 2);
|
|
len -= (sizeof(*rsb) + 2);
|
|
|
|
/* UniMAC may forward CRC */
|
|
if (priv->crc_fwd) {
|
|
skb_trim(skb, len - ETH_FCS_LEN);
|
|
len -= ETH_FCS_LEN;
|
|
}
|
|
|
|
skb->protocol = eth_type_trans(skb, ndev);
|
|
ndev->stats.rx_packets++;
|
|
ndev->stats.rx_bytes += len;
|
|
|
|
napi_gro_receive(&priv->napi, skb);
|
|
refill:
|
|
bcm_sysport_rx_refill(priv, cb);
|
|
}
|
|
|
|
return processed;
|
|
}
|
|
|
|
static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_priv *priv,
|
|
struct bcm_sysport_cb *cb,
|
|
unsigned int *bytes_compl,
|
|
unsigned int *pkts_compl)
|
|
{
|
|
struct device *kdev = &priv->pdev->dev;
|
|
struct net_device *ndev = priv->netdev;
|
|
|
|
if (cb->skb) {
|
|
ndev->stats.tx_bytes += cb->skb->len;
|
|
*bytes_compl += cb->skb->len;
|
|
dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
|
|
dma_unmap_len(cb, dma_len),
|
|
DMA_TO_DEVICE);
|
|
ndev->stats.tx_packets++;
|
|
(*pkts_compl)++;
|
|
bcm_sysport_free_cb(cb);
|
|
/* SKB fragment */
|
|
} else if (dma_unmap_addr(cb, dma_addr)) {
|
|
ndev->stats.tx_bytes += dma_unmap_len(cb, dma_len);
|
|
dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
|
|
dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
|
|
dma_unmap_addr_set(cb, dma_addr, 0);
|
|
}
|
|
}
|
|
|
|
/* Reclaim queued SKBs for transmission completion, lockless version */
|
|
static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
|
|
struct bcm_sysport_tx_ring *ring)
|
|
{
|
|
struct net_device *ndev = priv->netdev;
|
|
unsigned int c_index, last_c_index, last_tx_cn, num_tx_cbs;
|
|
unsigned int pkts_compl = 0, bytes_compl = 0;
|
|
struct bcm_sysport_cb *cb;
|
|
struct netdev_queue *txq;
|
|
u32 hw_ind;
|
|
|
|
txq = netdev_get_tx_queue(ndev, ring->index);
|
|
|
|
/* Compute how many descriptors have been processed since last call */
|
|
hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
|
|
c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
|
|
ring->p_index = (hw_ind & RING_PROD_INDEX_MASK);
|
|
|
|
last_c_index = ring->c_index;
|
|
num_tx_cbs = ring->size;
|
|
|
|
c_index &= (num_tx_cbs - 1);
|
|
|
|
if (c_index >= last_c_index)
|
|
last_tx_cn = c_index - last_c_index;
|
|
else
|
|
last_tx_cn = num_tx_cbs - last_c_index + c_index;
|
|
|
|
netif_dbg(priv, tx_done, ndev,
|
|
"ring=%d c_index=%d last_tx_cn=%d last_c_index=%d\n",
|
|
ring->index, c_index, last_tx_cn, last_c_index);
|
|
|
|
while (last_tx_cn-- > 0) {
|
|
cb = ring->cbs + last_c_index;
|
|
bcm_sysport_tx_reclaim_one(priv, cb, &bytes_compl, &pkts_compl);
|
|
|
|
ring->desc_count++;
|
|
last_c_index++;
|
|
last_c_index &= (num_tx_cbs - 1);
|
|
}
|
|
|
|
ring->c_index = c_index;
|
|
|
|
if (netif_tx_queue_stopped(txq) && pkts_compl)
|
|
netif_tx_wake_queue(txq);
|
|
|
|
netif_dbg(priv, tx_done, ndev,
|
|
"ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
|
|
ring->index, ring->c_index, pkts_compl, bytes_compl);
|
|
|
|
return pkts_compl;
|
|
}
|
|
|
|
/* Locked version of the per-ring TX reclaim routine */
|
|
static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
|
|
struct bcm_sysport_tx_ring *ring)
|
|
{
|
|
unsigned int released;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ring->lock, flags);
|
|
released = __bcm_sysport_tx_reclaim(priv, ring);
|
|
spin_unlock_irqrestore(&ring->lock, flags);
|
|
|
|
return released;
|
|
}
|
|
|
|
static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct bcm_sysport_tx_ring *ring =
|
|
container_of(napi, struct bcm_sysport_tx_ring, napi);
|
|
unsigned int work_done = 0;
|
|
|
|
work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
|
|
|
|
if (work_done == 0) {
|
|
napi_complete(napi);
|
|
/* re-enable TX interrupt */
|
|
intrl2_1_mask_clear(ring->priv, BIT(ring->index));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
|
|
{
|
|
unsigned int q;
|
|
|
|
for (q = 0; q < priv->netdev->num_tx_queues; q++)
|
|
bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
|
|
}
|
|
|
|
static int bcm_sysport_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct bcm_sysport_priv *priv =
|
|
container_of(napi, struct bcm_sysport_priv, napi);
|
|
unsigned int work_done = 0;
|
|
|
|
work_done = bcm_sysport_desc_rx(priv, budget);
|
|
|
|
priv->rx_c_index += work_done;
|
|
priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
|
|
rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
|
|
|
|
if (work_done < budget) {
|
|
napi_complete(napi);
|
|
/* re-enable RX interrupts */
|
|
intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
|
|
}
|
|
|
|
return work_done;
|
|
}
|
|
|
|
static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
|
|
{
|
|
u32 reg;
|
|
|
|
/* Stop monitoring MPD interrupt */
|
|
intrl2_0_mask_set(priv, INTRL2_0_MPD);
|
|
|
|
/* Clear the MagicPacket detection logic */
|
|
reg = umac_readl(priv, UMAC_MPD_CTRL);
|
|
reg &= ~MPD_EN;
|
|
umac_writel(priv, reg, UMAC_MPD_CTRL);
|
|
|
|
netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
|
|
}
|
|
|
|
/* RX and misc interrupt routine */
|
|
static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
|
|
priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
|
|
~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
|
|
intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
|
|
|
|
if (unlikely(priv->irq0_stat == 0)) {
|
|
netdev_warn(priv->netdev, "spurious RX interrupt\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
|
|
if (likely(napi_schedule_prep(&priv->napi))) {
|
|
/* disable RX interrupts */
|
|
intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
|
|
__napi_schedule(&priv->napi);
|
|
}
|
|
}
|
|
|
|
/* TX ring is full, perform a full reclaim since we do not know
|
|
* which one would trigger this interrupt
|
|
*/
|
|
if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
|
|
bcm_sysport_tx_reclaim_all(priv);
|
|
|
|
if (priv->irq0_stat & INTRL2_0_MPD) {
|
|
netdev_info(priv->netdev, "Wake-on-LAN interrupt!\n");
|
|
bcm_sysport_resume_from_wol(priv);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* TX interrupt service routine */
|
|
static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
struct bcm_sysport_tx_ring *txr;
|
|
unsigned int ring;
|
|
|
|
priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
|
|
~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
|
|
intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
|
|
|
|
if (unlikely(priv->irq1_stat == 0)) {
|
|
netdev_warn(priv->netdev, "spurious TX interrupt\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
for (ring = 0; ring < dev->num_tx_queues; ring++) {
|
|
if (!(priv->irq1_stat & BIT(ring)))
|
|
continue;
|
|
|
|
txr = &priv->tx_rings[ring];
|
|
|
|
if (likely(napi_schedule_prep(&txr->napi))) {
|
|
intrl2_1_mask_set(priv, BIT(ring));
|
|
__napi_schedule(&txr->napi);
|
|
}
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
|
|
{
|
|
struct bcm_sysport_priv *priv = dev_id;
|
|
|
|
pm_wakeup_event(&priv->pdev->dev, 0);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int bcm_sysport_insert_tsb(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct sk_buff *nskb;
|
|
struct bcm_tsb *tsb;
|
|
u32 csum_info;
|
|
u8 ip_proto;
|
|
u16 csum_start;
|
|
u16 ip_ver;
|
|
|
|
/* Re-allocate SKB if needed */
|
|
if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
|
|
nskb = skb_realloc_headroom(skb, sizeof(*tsb));
|
|
dev_kfree_skb(skb);
|
|
if (!nskb) {
|
|
dev->stats.tx_errors++;
|
|
dev->stats.tx_dropped++;
|
|
return -ENOMEM;
|
|
}
|
|
skb = nskb;
|
|
}
|
|
|
|
tsb = (struct bcm_tsb *)skb_push(skb, sizeof(*tsb));
|
|
/* Zero-out TSB by default */
|
|
memset(tsb, 0, sizeof(*tsb));
|
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
ip_ver = htons(skb->protocol);
|
|
switch (ip_ver) {
|
|
case ETH_P_IP:
|
|
ip_proto = ip_hdr(skb)->protocol;
|
|
break;
|
|
case ETH_P_IPV6:
|
|
ip_proto = ipv6_hdr(skb)->nexthdr;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
/* Get the checksum offset and the L4 (transport) offset */
|
|
csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
|
|
csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
|
|
csum_info |= (csum_start << L4_PTR_SHIFT);
|
|
|
|
if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
|
|
csum_info |= L4_LENGTH_VALID;
|
|
if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
|
|
csum_info |= L4_UDP;
|
|
} else {
|
|
csum_info = 0;
|
|
}
|
|
|
|
tsb->l4_ptr_dest_map = csum_info;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
|
|
struct net_device *dev)
|
|
{
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
struct device *kdev = &priv->pdev->dev;
|
|
struct bcm_sysport_tx_ring *ring;
|
|
struct bcm_sysport_cb *cb;
|
|
struct netdev_queue *txq;
|
|
struct dma_desc *desc;
|
|
unsigned int skb_len;
|
|
unsigned long flags;
|
|
dma_addr_t mapping;
|
|
u32 len_status;
|
|
u16 queue;
|
|
int ret;
|
|
|
|
queue = skb_get_queue_mapping(skb);
|
|
txq = netdev_get_tx_queue(dev, queue);
|
|
ring = &priv->tx_rings[queue];
|
|
|
|
/* lock against tx reclaim in BH context and TX ring full interrupt */
|
|
spin_lock_irqsave(&ring->lock, flags);
|
|
if (unlikely(ring->desc_count == 0)) {
|
|
netif_tx_stop_queue(txq);
|
|
netdev_err(dev, "queue %d awake and ring full!\n", queue);
|
|
ret = NETDEV_TX_BUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* Insert TSB and checksum infos */
|
|
if (priv->tsb_en) {
|
|
ret = bcm_sysport_insert_tsb(skb, dev);
|
|
if (ret) {
|
|
ret = NETDEV_TX_OK;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* The Ethernet switch we are interfaced with needs packets to be at
|
|
* least 64 bytes (including FCS) otherwise they will be discarded when
|
|
* they enter the switch port logic. When Broadcom tags are enabled, we
|
|
* need to make sure that packets are at least 68 bytes
|
|
* (including FCS and tag) because the length verification is done after
|
|
* the Broadcom tag is stripped off the ingress packet.
|
|
*/
|
|
if (skb_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) {
|
|
ret = NETDEV_TX_OK;
|
|
goto out;
|
|
}
|
|
|
|
skb_len = skb->len < ETH_ZLEN + ENET_BRCM_TAG_LEN ?
|
|
ETH_ZLEN + ENET_BRCM_TAG_LEN : skb->len;
|
|
|
|
mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
|
|
if (dma_mapping_error(kdev, mapping)) {
|
|
netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
|
|
skb->data, skb_len);
|
|
ret = NETDEV_TX_OK;
|
|
goto out;
|
|
}
|
|
|
|
/* Remember the SKB for future freeing */
|
|
cb = &ring->cbs[ring->curr_desc];
|
|
cb->skb = skb;
|
|
dma_unmap_addr_set(cb, dma_addr, mapping);
|
|
dma_unmap_len_set(cb, dma_len, skb_len);
|
|
|
|
/* Fetch a descriptor entry from our pool */
|
|
desc = ring->desc_cpu;
|
|
|
|
desc->addr_lo = lower_32_bits(mapping);
|
|
len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
|
|
len_status |= (skb_len << DESC_LEN_SHIFT);
|
|
len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
|
|
DESC_STATUS_SHIFT;
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL)
|
|
len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
|
|
|
|
ring->curr_desc++;
|
|
if (ring->curr_desc == ring->size)
|
|
ring->curr_desc = 0;
|
|
ring->desc_count--;
|
|
|
|
/* Ensure write completion of the descriptor status/length
|
|
* in DRAM before the System Port WRITE_PORT register latches
|
|
* the value
|
|
*/
|
|
wmb();
|
|
desc->addr_status_len = len_status;
|
|
wmb();
|
|
|
|
/* Write this descriptor address to the RING write port */
|
|
tdma_port_write_desc_addr(priv, desc, ring->index);
|
|
|
|
/* Check ring space and update SW control flow */
|
|
if (ring->desc_count == 0)
|
|
netif_tx_stop_queue(txq);
|
|
|
|
netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
|
|
ring->index, ring->desc_count, ring->curr_desc);
|
|
|
|
ret = NETDEV_TX_OK;
|
|
out:
|
|
spin_unlock_irqrestore(&ring->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static void bcm_sysport_tx_timeout(struct net_device *dev)
|
|
{
|
|
netdev_warn(dev, "transmit timeout!\n");
|
|
|
|
dev->trans_start = jiffies;
|
|
dev->stats.tx_errors++;
|
|
|
|
netif_tx_wake_all_queues(dev);
|
|
}
|
|
|
|
/* phylib adjust link callback */
|
|
static void bcm_sysport_adj_link(struct net_device *dev)
|
|
{
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
struct phy_device *phydev = priv->phydev;
|
|
unsigned int changed = 0;
|
|
u32 cmd_bits = 0, reg;
|
|
|
|
if (priv->old_link != phydev->link) {
|
|
changed = 1;
|
|
priv->old_link = phydev->link;
|
|
}
|
|
|
|
if (priv->old_duplex != phydev->duplex) {
|
|
changed = 1;
|
|
priv->old_duplex = phydev->duplex;
|
|
}
|
|
|
|
switch (phydev->speed) {
|
|
case SPEED_2500:
|
|
cmd_bits = CMD_SPEED_2500;
|
|
break;
|
|
case SPEED_1000:
|
|
cmd_bits = CMD_SPEED_1000;
|
|
break;
|
|
case SPEED_100:
|
|
cmd_bits = CMD_SPEED_100;
|
|
break;
|
|
case SPEED_10:
|
|
cmd_bits = CMD_SPEED_10;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
cmd_bits <<= CMD_SPEED_SHIFT;
|
|
|
|
if (phydev->duplex == DUPLEX_HALF)
|
|
cmd_bits |= CMD_HD_EN;
|
|
|
|
if (priv->old_pause != phydev->pause) {
|
|
changed = 1;
|
|
priv->old_pause = phydev->pause;
|
|
}
|
|
|
|
if (!phydev->pause)
|
|
cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
|
|
|
|
if (!changed)
|
|
return;
|
|
|
|
if (phydev->link) {
|
|
reg = umac_readl(priv, UMAC_CMD);
|
|
reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
|
|
CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
|
|
CMD_TX_PAUSE_IGNORE);
|
|
reg |= cmd_bits;
|
|
umac_writel(priv, reg, UMAC_CMD);
|
|
}
|
|
|
|
phy_print_status(priv->phydev);
|
|
}
|
|
|
|
static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
|
|
unsigned int index)
|
|
{
|
|
struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
|
|
struct device *kdev = &priv->pdev->dev;
|
|
size_t size;
|
|
void *p;
|
|
u32 reg;
|
|
|
|
/* Simple descriptors partitioning for now */
|
|
size = 256;
|
|
|
|
/* We just need one DMA descriptor which is DMA-able, since writing to
|
|
* the port will allocate a new descriptor in its internal linked-list
|
|
*/
|
|
p = dma_zalloc_coherent(kdev, 1, &ring->desc_dma, GFP_KERNEL);
|
|
if (!p) {
|
|
netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
|
|
if (!ring->cbs) {
|
|
netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Initialize SW view of the ring */
|
|
spin_lock_init(&ring->lock);
|
|
ring->priv = priv;
|
|
netif_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
|
|
ring->index = index;
|
|
ring->size = size;
|
|
ring->alloc_size = ring->size;
|
|
ring->desc_cpu = p;
|
|
ring->desc_count = ring->size;
|
|
ring->curr_desc = 0;
|
|
|
|
/* Initialize HW ring */
|
|
tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
|
|
tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
|
|
tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
|
|
tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
|
|
tdma_writel(priv, RING_IGNORE_STATUS, TDMA_DESC_RING_MAPPING(index));
|
|
tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
|
|
|
|
/* Program the number of descriptors as MAX_THRESHOLD and half of
|
|
* its size for the hysteresis trigger
|
|
*/
|
|
tdma_writel(priv, ring->size |
|
|
1 << RING_HYST_THRESH_SHIFT,
|
|
TDMA_DESC_RING_MAX_HYST(index));
|
|
|
|
/* Enable the ring queue in the arbiter */
|
|
reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
|
|
reg |= (1 << index);
|
|
tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
|
|
|
|
napi_enable(&ring->napi);
|
|
|
|
netif_dbg(priv, hw, priv->netdev,
|
|
"TDMA cfg, size=%d, desc_cpu=%p\n",
|
|
ring->size, ring->desc_cpu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
|
|
unsigned int index)
|
|
{
|
|
struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
|
|
struct device *kdev = &priv->pdev->dev;
|
|
u32 reg;
|
|
|
|
/* Caller should stop the TDMA engine */
|
|
reg = tdma_readl(priv, TDMA_STATUS);
|
|
if (!(reg & TDMA_DISABLED))
|
|
netdev_warn(priv->netdev, "TDMA not stopped!\n");
|
|
|
|
napi_disable(&ring->napi);
|
|
netif_napi_del(&ring->napi);
|
|
|
|
bcm_sysport_tx_reclaim(priv, ring);
|
|
|
|
kfree(ring->cbs);
|
|
ring->cbs = NULL;
|
|
|
|
if (ring->desc_dma) {
|
|
dma_free_coherent(kdev, 1, ring->desc_cpu, ring->desc_dma);
|
|
ring->desc_dma = 0;
|
|
}
|
|
ring->size = 0;
|
|
ring->alloc_size = 0;
|
|
|
|
netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
|
|
}
|
|
|
|
/* RDMA helper */
|
|
static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
|
|
unsigned int enable)
|
|
{
|
|
unsigned int timeout = 1000;
|
|
u32 reg;
|
|
|
|
reg = rdma_readl(priv, RDMA_CONTROL);
|
|
if (enable)
|
|
reg |= RDMA_EN;
|
|
else
|
|
reg &= ~RDMA_EN;
|
|
rdma_writel(priv, reg, RDMA_CONTROL);
|
|
|
|
/* Poll for RMDA disabling completion */
|
|
do {
|
|
reg = rdma_readl(priv, RDMA_STATUS);
|
|
if (!!(reg & RDMA_DISABLED) == !enable)
|
|
return 0;
|
|
usleep_range(1000, 2000);
|
|
} while (timeout-- > 0);
|
|
|
|
netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* TDMA helper */
|
|
static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
|
|
unsigned int enable)
|
|
{
|
|
unsigned int timeout = 1000;
|
|
u32 reg;
|
|
|
|
reg = tdma_readl(priv, TDMA_CONTROL);
|
|
if (enable)
|
|
reg |= TDMA_EN;
|
|
else
|
|
reg &= ~TDMA_EN;
|
|
tdma_writel(priv, reg, TDMA_CONTROL);
|
|
|
|
/* Poll for TMDA disabling completion */
|
|
do {
|
|
reg = tdma_readl(priv, TDMA_STATUS);
|
|
if (!!(reg & TDMA_DISABLED) == !enable)
|
|
return 0;
|
|
|
|
usleep_range(1000, 2000);
|
|
} while (timeout-- > 0);
|
|
|
|
netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
|
|
{
|
|
u32 reg;
|
|
int ret;
|
|
|
|
/* Initialize SW view of the RX ring */
|
|
priv->num_rx_bds = NUM_RX_DESC;
|
|
priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
|
|
priv->rx_bd_assign_ptr = priv->rx_bds;
|
|
priv->rx_bd_assign_index = 0;
|
|
priv->rx_c_index = 0;
|
|
priv->rx_read_ptr = 0;
|
|
priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
|
|
GFP_KERNEL);
|
|
if (!priv->rx_cbs) {
|
|
netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = bcm_sysport_alloc_rx_bufs(priv);
|
|
if (ret) {
|
|
netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Initialize HW, ensure RDMA is disabled */
|
|
reg = rdma_readl(priv, RDMA_STATUS);
|
|
if (!(reg & RDMA_DISABLED))
|
|
rdma_enable_set(priv, 0);
|
|
|
|
rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
|
|
rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
|
|
rdma_writel(priv, 0, RDMA_PROD_INDEX);
|
|
rdma_writel(priv, 0, RDMA_CONS_INDEX);
|
|
rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
|
|
RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
|
|
/* Operate the queue in ring mode */
|
|
rdma_writel(priv, 0, RDMA_START_ADDR_HI);
|
|
rdma_writel(priv, 0, RDMA_START_ADDR_LO);
|
|
rdma_writel(priv, 0, RDMA_END_ADDR_HI);
|
|
rdma_writel(priv, NUM_HW_RX_DESC_WORDS - 1, RDMA_END_ADDR_LO);
|
|
|
|
rdma_writel(priv, 1, RDMA_MBDONE_INTR);
|
|
|
|
netif_dbg(priv, hw, priv->netdev,
|
|
"RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
|
|
priv->num_rx_bds, priv->rx_bds);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
|
|
{
|
|
struct bcm_sysport_cb *cb;
|
|
unsigned int i;
|
|
u32 reg;
|
|
|
|
/* Caller should ensure RDMA is disabled */
|
|
reg = rdma_readl(priv, RDMA_STATUS);
|
|
if (!(reg & RDMA_DISABLED))
|
|
netdev_warn(priv->netdev, "RDMA not stopped!\n");
|
|
|
|
for (i = 0; i < priv->num_rx_bds; i++) {
|
|
cb = &priv->rx_cbs[i];
|
|
if (dma_unmap_addr(cb, dma_addr))
|
|
dma_unmap_single(&priv->pdev->dev,
|
|
dma_unmap_addr(cb, dma_addr),
|
|
RX_BUF_LENGTH, DMA_FROM_DEVICE);
|
|
bcm_sysport_free_cb(cb);
|
|
}
|
|
|
|
kfree(priv->rx_cbs);
|
|
priv->rx_cbs = NULL;
|
|
|
|
netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
|
|
}
|
|
|
|
static void bcm_sysport_set_rx_mode(struct net_device *dev)
|
|
{
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
u32 reg;
|
|
|
|
reg = umac_readl(priv, UMAC_CMD);
|
|
if (dev->flags & IFF_PROMISC)
|
|
reg |= CMD_PROMISC;
|
|
else
|
|
reg &= ~CMD_PROMISC;
|
|
umac_writel(priv, reg, UMAC_CMD);
|
|
|
|
/* No support for ALLMULTI */
|
|
if (dev->flags & IFF_ALLMULTI)
|
|
return;
|
|
}
|
|
|
|
static inline void umac_enable_set(struct bcm_sysport_priv *priv,
|
|
u32 mask, unsigned int enable)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = umac_readl(priv, UMAC_CMD);
|
|
if (enable)
|
|
reg |= mask;
|
|
else
|
|
reg &= ~mask;
|
|
umac_writel(priv, reg, UMAC_CMD);
|
|
|
|
/* UniMAC stops on a packet boundary, wait for a full-sized packet
|
|
* to be processed (1 msec).
|
|
*/
|
|
if (enable == 0)
|
|
usleep_range(1000, 2000);
|
|
}
|
|
|
|
static inline void umac_reset(struct bcm_sysport_priv *priv)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = umac_readl(priv, UMAC_CMD);
|
|
reg |= CMD_SW_RESET;
|
|
umac_writel(priv, reg, UMAC_CMD);
|
|
udelay(10);
|
|
reg = umac_readl(priv, UMAC_CMD);
|
|
reg &= ~CMD_SW_RESET;
|
|
umac_writel(priv, reg, UMAC_CMD);
|
|
}
|
|
|
|
static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
|
|
unsigned char *addr)
|
|
{
|
|
umac_writel(priv, (addr[0] << 24) | (addr[1] << 16) |
|
|
(addr[2] << 8) | addr[3], UMAC_MAC0);
|
|
umac_writel(priv, (addr[4] << 8) | addr[5], UMAC_MAC1);
|
|
}
|
|
|
|
static void topctrl_flush(struct bcm_sysport_priv *priv)
|
|
{
|
|
topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
|
|
topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
|
|
mdelay(1);
|
|
topctrl_writel(priv, 0, RX_FLUSH_CNTL);
|
|
topctrl_writel(priv, 0, TX_FLUSH_CNTL);
|
|
}
|
|
|
|
static void bcm_sysport_netif_start(struct net_device *dev)
|
|
{
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
|
|
/* Enable NAPI */
|
|
napi_enable(&priv->napi);
|
|
|
|
phy_start(priv->phydev);
|
|
|
|
/* Enable TX interrupts for the 32 TXQs */
|
|
intrl2_1_mask_clear(priv, 0xffffffff);
|
|
|
|
/* Last call before we start the real business */
|
|
netif_tx_start_all_queues(dev);
|
|
}
|
|
|
|
static void rbuf_init(struct bcm_sysport_priv *priv)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = rbuf_readl(priv, RBUF_CONTROL);
|
|
reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
|
|
rbuf_writel(priv, reg, RBUF_CONTROL);
|
|
}
|
|
|
|
static int bcm_sysport_open(struct net_device *dev)
|
|
{
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
/* Reset UniMAC */
|
|
umac_reset(priv);
|
|
|
|
/* Flush TX and RX FIFOs at TOPCTRL level */
|
|
topctrl_flush(priv);
|
|
|
|
/* Disable the UniMAC RX/TX */
|
|
umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
|
|
|
|
/* Enable RBUF 2bytes alignment and Receive Status Block */
|
|
rbuf_init(priv);
|
|
|
|
/* Set maximum frame length */
|
|
umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
|
|
|
|
/* Set MAC address */
|
|
umac_set_hw_addr(priv, dev->dev_addr);
|
|
|
|
/* Read CRC forward */
|
|
priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
|
|
|
|
priv->phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
|
|
0, priv->phy_interface);
|
|
if (!priv->phydev) {
|
|
netdev_err(dev, "could not attach to PHY\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Reset house keeping link status */
|
|
priv->old_duplex = -1;
|
|
priv->old_link = -1;
|
|
priv->old_pause = -1;
|
|
|
|
/* mask all interrupts and request them */
|
|
intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
|
|
intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
|
|
intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
|
|
intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
|
|
intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
|
|
intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
|
|
|
|
ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
|
|
if (ret) {
|
|
netdev_err(dev, "failed to request RX interrupt\n");
|
|
goto out_phy_disconnect;
|
|
}
|
|
|
|
ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, dev->name, dev);
|
|
if (ret) {
|
|
netdev_err(dev, "failed to request TX interrupt\n");
|
|
goto out_free_irq0;
|
|
}
|
|
|
|
/* Initialize both hardware and software ring */
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
ret = bcm_sysport_init_tx_ring(priv, i);
|
|
if (ret) {
|
|
netdev_err(dev, "failed to initialize TX ring %d\n",
|
|
i);
|
|
goto out_free_tx_ring;
|
|
}
|
|
}
|
|
|
|
/* Initialize linked-list */
|
|
tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
|
|
|
|
/* Initialize RX ring */
|
|
ret = bcm_sysport_init_rx_ring(priv);
|
|
if (ret) {
|
|
netdev_err(dev, "failed to initialize RX ring\n");
|
|
goto out_free_rx_ring;
|
|
}
|
|
|
|
/* Turn on RDMA */
|
|
ret = rdma_enable_set(priv, 1);
|
|
if (ret)
|
|
goto out_free_rx_ring;
|
|
|
|
/* Enable RX interrupt and TX ring full interrupt */
|
|
intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
|
|
|
|
/* Turn on TDMA */
|
|
ret = tdma_enable_set(priv, 1);
|
|
if (ret)
|
|
goto out_clear_rx_int;
|
|
|
|
/* Turn on UniMAC TX/RX */
|
|
umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
|
|
|
|
bcm_sysport_netif_start(dev);
|
|
|
|
return 0;
|
|
|
|
out_clear_rx_int:
|
|
intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
|
|
out_free_rx_ring:
|
|
bcm_sysport_fini_rx_ring(priv);
|
|
out_free_tx_ring:
|
|
for (i = 0; i < dev->num_tx_queues; i++)
|
|
bcm_sysport_fini_tx_ring(priv, i);
|
|
free_irq(priv->irq1, dev);
|
|
out_free_irq0:
|
|
free_irq(priv->irq0, dev);
|
|
out_phy_disconnect:
|
|
phy_disconnect(priv->phydev);
|
|
return ret;
|
|
}
|
|
|
|
static void bcm_sysport_netif_stop(struct net_device *dev)
|
|
{
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
|
|
/* stop all software from updating hardware */
|
|
netif_tx_stop_all_queues(dev);
|
|
napi_disable(&priv->napi);
|
|
phy_stop(priv->phydev);
|
|
|
|
/* mask all interrupts */
|
|
intrl2_0_mask_set(priv, 0xffffffff);
|
|
intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
|
|
intrl2_1_mask_set(priv, 0xffffffff);
|
|
intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
|
|
}
|
|
|
|
static int bcm_sysport_stop(struct net_device *dev)
|
|
{
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
bcm_sysport_netif_stop(dev);
|
|
|
|
/* Disable UniMAC RX */
|
|
umac_enable_set(priv, CMD_RX_EN, 0);
|
|
|
|
ret = tdma_enable_set(priv, 0);
|
|
if (ret) {
|
|
netdev_err(dev, "timeout disabling RDMA\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Wait for a maximum packet size to be drained */
|
|
usleep_range(2000, 3000);
|
|
|
|
ret = rdma_enable_set(priv, 0);
|
|
if (ret) {
|
|
netdev_err(dev, "timeout disabling TDMA\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Disable UniMAC TX */
|
|
umac_enable_set(priv, CMD_TX_EN, 0);
|
|
|
|
/* Free RX/TX rings SW structures */
|
|
for (i = 0; i < dev->num_tx_queues; i++)
|
|
bcm_sysport_fini_tx_ring(priv, i);
|
|
bcm_sysport_fini_rx_ring(priv);
|
|
|
|
free_irq(priv->irq0, dev);
|
|
free_irq(priv->irq1, dev);
|
|
|
|
/* Disconnect from PHY */
|
|
phy_disconnect(priv->phydev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct ethtool_ops bcm_sysport_ethtool_ops = {
|
|
.get_settings = bcm_sysport_get_settings,
|
|
.set_settings = bcm_sysport_set_settings,
|
|
.get_drvinfo = bcm_sysport_get_drvinfo,
|
|
.get_msglevel = bcm_sysport_get_msglvl,
|
|
.set_msglevel = bcm_sysport_set_msglvl,
|
|
.get_link = ethtool_op_get_link,
|
|
.get_strings = bcm_sysport_get_strings,
|
|
.get_ethtool_stats = bcm_sysport_get_stats,
|
|
.get_sset_count = bcm_sysport_get_sset_count,
|
|
.get_wol = bcm_sysport_get_wol,
|
|
.set_wol = bcm_sysport_set_wol,
|
|
};
|
|
|
|
static const struct net_device_ops bcm_sysport_netdev_ops = {
|
|
.ndo_start_xmit = bcm_sysport_xmit,
|
|
.ndo_tx_timeout = bcm_sysport_tx_timeout,
|
|
.ndo_open = bcm_sysport_open,
|
|
.ndo_stop = bcm_sysport_stop,
|
|
.ndo_set_features = bcm_sysport_set_features,
|
|
.ndo_set_rx_mode = bcm_sysport_set_rx_mode,
|
|
};
|
|
|
|
#define REV_FMT "v%2x.%02x"
|
|
|
|
static int bcm_sysport_probe(struct platform_device *pdev)
|
|
{
|
|
struct bcm_sysport_priv *priv;
|
|
struct device_node *dn;
|
|
struct net_device *dev;
|
|
const void *macaddr;
|
|
struct resource *r;
|
|
u32 txq, rxq;
|
|
int ret;
|
|
|
|
dn = pdev->dev.of_node;
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
/* Read the Transmit/Receive Queue properties */
|
|
if (of_property_read_u32(dn, "systemport,num-txq", &txq))
|
|
txq = TDMA_NUM_RINGS;
|
|
if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
|
|
rxq = 1;
|
|
|
|
dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
/* Initialize private members */
|
|
priv = netdev_priv(dev);
|
|
|
|
priv->irq0 = platform_get_irq(pdev, 0);
|
|
priv->irq1 = platform_get_irq(pdev, 1);
|
|
priv->wol_irq = platform_get_irq(pdev, 2);
|
|
if (priv->irq0 <= 0 || priv->irq1 <= 0) {
|
|
dev_err(&pdev->dev, "invalid interrupts\n");
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
priv->base = devm_ioremap_resource(&pdev->dev, r);
|
|
if (IS_ERR(priv->base)) {
|
|
ret = PTR_ERR(priv->base);
|
|
goto err;
|
|
}
|
|
|
|
priv->netdev = dev;
|
|
priv->pdev = pdev;
|
|
|
|
priv->phy_interface = of_get_phy_mode(dn);
|
|
/* Default to GMII interface mode */
|
|
if (priv->phy_interface < 0)
|
|
priv->phy_interface = PHY_INTERFACE_MODE_GMII;
|
|
|
|
/* In the case of a fixed PHY, the DT node associated
|
|
* to the PHY is the Ethernet MAC DT node.
|
|
*/
|
|
if (of_phy_is_fixed_link(dn)) {
|
|
ret = of_phy_register_fixed_link(dn);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register fixed PHY\n");
|
|
goto err;
|
|
}
|
|
|
|
priv->phy_dn = dn;
|
|
}
|
|
|
|
/* Initialize netdevice members */
|
|
macaddr = of_get_mac_address(dn);
|
|
if (!macaddr || !is_valid_ether_addr(macaddr)) {
|
|
dev_warn(&pdev->dev, "using random Ethernet MAC\n");
|
|
random_ether_addr(dev->dev_addr);
|
|
} else {
|
|
ether_addr_copy(dev->dev_addr, macaddr);
|
|
}
|
|
|
|
SET_NETDEV_DEV(dev, &pdev->dev);
|
|
dev_set_drvdata(&pdev->dev, dev);
|
|
dev->ethtool_ops = &bcm_sysport_ethtool_ops;
|
|
dev->netdev_ops = &bcm_sysport_netdev_ops;
|
|
netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
|
|
|
|
/* HW supported features, none enabled by default */
|
|
dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
|
|
NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
|
|
|
|
/* Request the WOL interrupt and advertise suspend if available */
|
|
priv->wol_irq_disabled = 1;
|
|
ret = devm_request_irq(&pdev->dev, priv->wol_irq,
|
|
bcm_sysport_wol_isr, 0, dev->name, priv);
|
|
if (!ret)
|
|
device_set_wakeup_capable(&pdev->dev, 1);
|
|
|
|
/* Set the needed headroom once and for all */
|
|
BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
|
|
dev->needed_headroom += sizeof(struct bcm_tsb);
|
|
|
|
/* libphy will adjust the link state accordingly */
|
|
netif_carrier_off(dev);
|
|
|
|
ret = register_netdev(dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register net_device\n");
|
|
goto err;
|
|
}
|
|
|
|
priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
|
|
dev_info(&pdev->dev,
|
|
"Broadcom SYSTEMPORT" REV_FMT
|
|
" at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
|
|
(priv->rev >> 8) & 0xff, priv->rev & 0xff,
|
|
priv->base, priv->irq0, priv->irq1, txq, rxq);
|
|
|
|
return 0;
|
|
err:
|
|
free_netdev(dev);
|
|
return ret;
|
|
}
|
|
|
|
static int bcm_sysport_remove(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev = dev_get_drvdata(&pdev->dev);
|
|
|
|
/* Not much to do, ndo_close has been called
|
|
* and we use managed allocations
|
|
*/
|
|
unregister_netdev(dev);
|
|
free_netdev(dev);
|
|
dev_set_drvdata(&pdev->dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
|
|
{
|
|
struct net_device *ndev = priv->netdev;
|
|
unsigned int timeout = 1000;
|
|
u32 reg;
|
|
|
|
/* Password has already been programmed */
|
|
reg = umac_readl(priv, UMAC_MPD_CTRL);
|
|
reg |= MPD_EN;
|
|
reg &= ~PSW_EN;
|
|
if (priv->wolopts & WAKE_MAGICSECURE)
|
|
reg |= PSW_EN;
|
|
umac_writel(priv, reg, UMAC_MPD_CTRL);
|
|
|
|
/* Make sure RBUF entered WoL mode as result */
|
|
do {
|
|
reg = rbuf_readl(priv, RBUF_STATUS);
|
|
if (reg & RBUF_WOL_MODE)
|
|
break;
|
|
|
|
udelay(10);
|
|
} while (timeout-- > 0);
|
|
|
|
/* Do not leave the UniMAC RBUF matching only MPD packets */
|
|
if (!timeout) {
|
|
reg = umac_readl(priv, UMAC_MPD_CTRL);
|
|
reg &= ~MPD_EN;
|
|
umac_writel(priv, reg, UMAC_MPD_CTRL);
|
|
netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* UniMAC receive needs to be turned on */
|
|
umac_enable_set(priv, CMD_RX_EN, 1);
|
|
|
|
/* Enable the interrupt wake-up source */
|
|
intrl2_0_mask_clear(priv, INTRL2_0_MPD);
|
|
|
|
netif_dbg(priv, wol, ndev, "entered WOL mode\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_sysport_suspend(struct device *d)
|
|
{
|
|
struct net_device *dev = dev_get_drvdata(d);
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
unsigned int i;
|
|
int ret = 0;
|
|
u32 reg;
|
|
|
|
if (!netif_running(dev))
|
|
return 0;
|
|
|
|
bcm_sysport_netif_stop(dev);
|
|
|
|
phy_suspend(priv->phydev);
|
|
|
|
netif_device_detach(dev);
|
|
|
|
/* Disable UniMAC RX */
|
|
umac_enable_set(priv, CMD_RX_EN, 0);
|
|
|
|
ret = rdma_enable_set(priv, 0);
|
|
if (ret) {
|
|
netdev_err(dev, "RDMA timeout!\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Disable RXCHK if enabled */
|
|
if (priv->rx_chk_en) {
|
|
reg = rxchk_readl(priv, RXCHK_CONTROL);
|
|
reg &= ~RXCHK_EN;
|
|
rxchk_writel(priv, reg, RXCHK_CONTROL);
|
|
}
|
|
|
|
/* Flush RX pipe */
|
|
if (!priv->wolopts)
|
|
topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
|
|
|
|
ret = tdma_enable_set(priv, 0);
|
|
if (ret) {
|
|
netdev_err(dev, "TDMA timeout!\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Wait for a packet boundary */
|
|
usleep_range(2000, 3000);
|
|
|
|
umac_enable_set(priv, CMD_TX_EN, 0);
|
|
|
|
topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
|
|
|
|
/* Free RX/TX rings SW structures */
|
|
for (i = 0; i < dev->num_tx_queues; i++)
|
|
bcm_sysport_fini_tx_ring(priv, i);
|
|
bcm_sysport_fini_rx_ring(priv);
|
|
|
|
/* Get prepared for Wake-on-LAN */
|
|
if (device_may_wakeup(d) && priv->wolopts)
|
|
ret = bcm_sysport_suspend_to_wol(priv);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int bcm_sysport_resume(struct device *d)
|
|
{
|
|
struct net_device *dev = dev_get_drvdata(d);
|
|
struct bcm_sysport_priv *priv = netdev_priv(dev);
|
|
unsigned int i;
|
|
u32 reg;
|
|
int ret;
|
|
|
|
if (!netif_running(dev))
|
|
return 0;
|
|
|
|
/* We may have been suspended and never received a WOL event that
|
|
* would turn off MPD detection, take care of that now
|
|
*/
|
|
bcm_sysport_resume_from_wol(priv);
|
|
|
|
/* Initialize both hardware and software ring */
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
ret = bcm_sysport_init_tx_ring(priv, i);
|
|
if (ret) {
|
|
netdev_err(dev, "failed to initialize TX ring %d\n",
|
|
i);
|
|
goto out_free_tx_rings;
|
|
}
|
|
}
|
|
|
|
/* Initialize linked-list */
|
|
tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
|
|
|
|
/* Initialize RX ring */
|
|
ret = bcm_sysport_init_rx_ring(priv);
|
|
if (ret) {
|
|
netdev_err(dev, "failed to initialize RX ring\n");
|
|
goto out_free_rx_ring;
|
|
}
|
|
|
|
netif_device_attach(dev);
|
|
|
|
/* Enable RX interrupt and TX ring full interrupt */
|
|
intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
|
|
|
|
/* RX pipe enable */
|
|
topctrl_writel(priv, 0, RX_FLUSH_CNTL);
|
|
|
|
ret = rdma_enable_set(priv, 1);
|
|
if (ret) {
|
|
netdev_err(dev, "failed to enable RDMA\n");
|
|
goto out_free_rx_ring;
|
|
}
|
|
|
|
/* Enable rxhck */
|
|
if (priv->rx_chk_en) {
|
|
reg = rxchk_readl(priv, RXCHK_CONTROL);
|
|
reg |= RXCHK_EN;
|
|
rxchk_writel(priv, reg, RXCHK_CONTROL);
|
|
}
|
|
|
|
rbuf_init(priv);
|
|
|
|
/* Set maximum frame length */
|
|
umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
|
|
|
|
/* Set MAC address */
|
|
umac_set_hw_addr(priv, dev->dev_addr);
|
|
|
|
umac_enable_set(priv, CMD_RX_EN, 1);
|
|
|
|
/* TX pipe enable */
|
|
topctrl_writel(priv, 0, TX_FLUSH_CNTL);
|
|
|
|
umac_enable_set(priv, CMD_TX_EN, 1);
|
|
|
|
ret = tdma_enable_set(priv, 1);
|
|
if (ret) {
|
|
netdev_err(dev, "TDMA timeout!\n");
|
|
goto out_free_rx_ring;
|
|
}
|
|
|
|
phy_resume(priv->phydev);
|
|
|
|
bcm_sysport_netif_start(dev);
|
|
|
|
return 0;
|
|
|
|
out_free_rx_ring:
|
|
bcm_sysport_fini_rx_ring(priv);
|
|
out_free_tx_rings:
|
|
for (i = 0; i < dev->num_tx_queues; i++)
|
|
bcm_sysport_fini_tx_ring(priv, i);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
|
|
bcm_sysport_suspend, bcm_sysport_resume);
|
|
|
|
static const struct of_device_id bcm_sysport_of_match[] = {
|
|
{ .compatible = "brcm,systemport-v1.00" },
|
|
{ .compatible = "brcm,systemport" },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static struct platform_driver bcm_sysport_driver = {
|
|
.probe = bcm_sysport_probe,
|
|
.remove = bcm_sysport_remove,
|
|
.driver = {
|
|
.name = "brcm-systemport",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = bcm_sysport_of_match,
|
|
.pm = &bcm_sysport_pm_ops,
|
|
},
|
|
};
|
|
module_platform_driver(bcm_sysport_driver);
|
|
|
|
MODULE_AUTHOR("Broadcom Corporation");
|
|
MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
|
|
MODULE_ALIAS("platform:brcm-systemport");
|
|
MODULE_LICENSE("GPL");
|