| /* |
| * Broadcom GENET (Gigabit Ethernet) controller driver |
| * |
| * Copyright (c) 2014 Broadcom Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #define pr_fmt(fmt) "bcmgenet: " fmt |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/sched.h> |
| #include <linux/types.h> |
| #include <linux/fcntl.h> |
| #include <linux/interrupt.h> |
| #include <linux/string.h> |
| #include <linux/if_ether.h> |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| #include <linux/delay.h> |
| #include <linux/platform_device.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/pm.h> |
| #include <linux/clk.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_net.h> |
| #include <linux/of_platform.h> |
| #include <net/arp.h> |
| |
| #include <linux/mii.h> |
| #include <linux/ethtool.h> |
| #include <linux/netdevice.h> |
| #include <linux/inetdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/in.h> |
| #include <linux/ip.h> |
| #include <linux/ipv6.h> |
| #include <linux/phy.h> |
| |
| #include <asm/unaligned.h> |
| |
| #include "bcmgenet.h" |
| |
| /* Maximum number of hardware queues, downsized if needed */ |
| #define GENET_MAX_MQ_CNT 4 |
| |
| /* Default highest priority queue for multi queue support */ |
| #define GENET_Q0_PRIORITY 0 |
| |
| #define GENET_DEFAULT_BD_CNT \ |
| (TOTAL_DESC - priv->hw_params->tx_queues * priv->hw_params->bds_cnt) |
| |
| #define RX_BUF_LENGTH 2048 |
| #define SKB_ALIGNMENT 32 |
| |
| /* Tx/Rx DMA register offset, skip 256 descriptors */ |
| #define WORDS_PER_BD(p) (p->hw_params->words_per_bd) |
| #define DMA_DESC_SIZE (WORDS_PER_BD(priv) * sizeof(u32)) |
| |
| #define GENET_TDMA_REG_OFF (priv->hw_params->tdma_offset + \ |
| TOTAL_DESC * DMA_DESC_SIZE) |
| |
| #define GENET_RDMA_REG_OFF (priv->hw_params->rdma_offset + \ |
| TOTAL_DESC * DMA_DESC_SIZE) |
| |
| static inline void dmadesc_set_length_status(struct bcmgenet_priv *priv, |
| void __iomem *d, u32 value) |
| { |
| __raw_writel(value, d + DMA_DESC_LENGTH_STATUS); |
| } |
| |
| static inline u32 dmadesc_get_length_status(struct bcmgenet_priv *priv, |
| void __iomem *d) |
| { |
| return __raw_readl(d + DMA_DESC_LENGTH_STATUS); |
| } |
| |
| static inline void dmadesc_set_addr(struct bcmgenet_priv *priv, |
| void __iomem *d, |
| dma_addr_t addr) |
| { |
| __raw_writel(lower_32_bits(addr), d + DMA_DESC_ADDRESS_LO); |
| |
| /* Register writes to GISB bus can take couple hundred nanoseconds |
| * and are done for each packet, save these expensive writes unless |
| * the platform is explicitly configured for 64-bits/LPAE. |
| */ |
| #ifdef CONFIG_PHYS_ADDR_T_64BIT |
| if (priv->hw_params->flags & GENET_HAS_40BITS) |
| __raw_writel(upper_32_bits(addr), d + DMA_DESC_ADDRESS_HI); |
| #endif |
| } |
| |
| /* Combined address + length/status setter */ |
| static inline void dmadesc_set(struct bcmgenet_priv *priv, |
| void __iomem *d, dma_addr_t addr, u32 val) |
| { |
| dmadesc_set_length_status(priv, d, val); |
| dmadesc_set_addr(priv, d, addr); |
| } |
| |
| static inline dma_addr_t dmadesc_get_addr(struct bcmgenet_priv *priv, |
| void __iomem *d) |
| { |
| dma_addr_t addr; |
| |
| addr = __raw_readl(d + DMA_DESC_ADDRESS_LO); |
| |
| /* Register writes to GISB bus can take couple hundred nanoseconds |
| * and are done for each packet, save these expensive writes unless |
| * the platform is explicitly configured for 64-bits/LPAE. |
| */ |
| #ifdef CONFIG_PHYS_ADDR_T_64BIT |
| if (priv->hw_params->flags & GENET_HAS_40BITS) |
| addr |= (u64)__raw_readl(d + DMA_DESC_ADDRESS_HI) << 32; |
| #endif |
| return addr; |
| } |
| |
| #define GENET_VER_FMT "%1d.%1d EPHY: 0x%04x" |
| |
| #define GENET_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \ |
| NETIF_MSG_LINK) |
| |
| static inline u32 bcmgenet_rbuf_ctrl_get(struct bcmgenet_priv *priv) |
| { |
| if (GENET_IS_V1(priv)) |
| return bcmgenet_rbuf_readl(priv, RBUF_FLUSH_CTRL_V1); |
| else |
| return bcmgenet_sys_readl(priv, SYS_RBUF_FLUSH_CTRL); |
| } |
| |
| static inline void bcmgenet_rbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val) |
| { |
| if (GENET_IS_V1(priv)) |
| bcmgenet_rbuf_writel(priv, val, RBUF_FLUSH_CTRL_V1); |
| else |
| bcmgenet_sys_writel(priv, val, SYS_RBUF_FLUSH_CTRL); |
| } |
| |
| /* These macros are defined to deal with register map change |
| * between GENET1.1 and GENET2. Only those currently being used |
| * by driver are defined. |
| */ |
| static inline u32 bcmgenet_tbuf_ctrl_get(struct bcmgenet_priv *priv) |
| { |
| if (GENET_IS_V1(priv)) |
| return bcmgenet_rbuf_readl(priv, TBUF_CTRL_V1); |
| else |
| return __raw_readl(priv->base + |
| priv->hw_params->tbuf_offset + TBUF_CTRL); |
| } |
| |
| static inline void bcmgenet_tbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val) |
| { |
| if (GENET_IS_V1(priv)) |
| bcmgenet_rbuf_writel(priv, val, TBUF_CTRL_V1); |
| else |
| __raw_writel(val, priv->base + |
| priv->hw_params->tbuf_offset + TBUF_CTRL); |
| } |
| |
| static inline u32 bcmgenet_bp_mc_get(struct bcmgenet_priv *priv) |
| { |
| if (GENET_IS_V1(priv)) |
| return bcmgenet_rbuf_readl(priv, TBUF_BP_MC_V1); |
| else |
| return __raw_readl(priv->base + |
| priv->hw_params->tbuf_offset + TBUF_BP_MC); |
| } |
| |
| static inline void bcmgenet_bp_mc_set(struct bcmgenet_priv *priv, u32 val) |
| { |
| if (GENET_IS_V1(priv)) |
| bcmgenet_rbuf_writel(priv, val, TBUF_BP_MC_V1); |
| else |
| __raw_writel(val, priv->base + |
| priv->hw_params->tbuf_offset + TBUF_BP_MC); |
| } |
| |
| /* RX/TX DMA register accessors */ |
| enum dma_reg { |
| DMA_RING_CFG = 0, |
| DMA_CTRL, |
| DMA_STATUS, |
| DMA_SCB_BURST_SIZE, |
| DMA_ARB_CTRL, |
| DMA_PRIORITY, |
| DMA_RING_PRIORITY, |
| }; |
| |
| static const u8 bcmgenet_dma_regs_v3plus[] = { |
| [DMA_RING_CFG] = 0x00, |
| [DMA_CTRL] = 0x04, |
| [DMA_STATUS] = 0x08, |
| [DMA_SCB_BURST_SIZE] = 0x0C, |
| [DMA_ARB_CTRL] = 0x2C, |
| [DMA_PRIORITY] = 0x30, |
| [DMA_RING_PRIORITY] = 0x38, |
| }; |
| |
| static const u8 bcmgenet_dma_regs_v2[] = { |
| [DMA_RING_CFG] = 0x00, |
| [DMA_CTRL] = 0x04, |
| [DMA_STATUS] = 0x08, |
| [DMA_SCB_BURST_SIZE] = 0x0C, |
| [DMA_ARB_CTRL] = 0x30, |
| [DMA_PRIORITY] = 0x34, |
| [DMA_RING_PRIORITY] = 0x3C, |
| }; |
| |
| static const u8 bcmgenet_dma_regs_v1[] = { |
| [DMA_CTRL] = 0x00, |
| [DMA_STATUS] = 0x04, |
| [DMA_SCB_BURST_SIZE] = 0x0C, |
| [DMA_ARB_CTRL] = 0x30, |
| [DMA_PRIORITY] = 0x34, |
| [DMA_RING_PRIORITY] = 0x3C, |
| }; |
| |
| /* Set at runtime once bcmgenet version is known */ |
| static const u8 *bcmgenet_dma_regs; |
| |
| static inline struct bcmgenet_priv *dev_to_priv(struct device *dev) |
| { |
| return netdev_priv(dev_get_drvdata(dev)); |
| } |
| |
| static inline u32 bcmgenet_tdma_readl(struct bcmgenet_priv *priv, |
| enum dma_reg r) |
| { |
| return __raw_readl(priv->base + GENET_TDMA_REG_OFF + |
| DMA_RINGS_SIZE + bcmgenet_dma_regs[r]); |
| } |
| |
| static inline void bcmgenet_tdma_writel(struct bcmgenet_priv *priv, |
| u32 val, enum dma_reg r) |
| { |
| __raw_writel(val, priv->base + GENET_TDMA_REG_OFF + |
| DMA_RINGS_SIZE + bcmgenet_dma_regs[r]); |
| } |
| |
| static inline u32 bcmgenet_rdma_readl(struct bcmgenet_priv *priv, |
| enum dma_reg r) |
| { |
| return __raw_readl(priv->base + GENET_RDMA_REG_OFF + |
| DMA_RINGS_SIZE + bcmgenet_dma_regs[r]); |
| } |
| |
| static inline void bcmgenet_rdma_writel(struct bcmgenet_priv *priv, |
| u32 val, enum dma_reg r) |
| { |
| __raw_writel(val, priv->base + GENET_RDMA_REG_OFF + |
| DMA_RINGS_SIZE + bcmgenet_dma_regs[r]); |
| } |
| |
| /* RDMA/TDMA ring registers and accessors |
| * we merge the common fields and just prefix with T/D the registers |
| * having different meaning depending on the direction |
| */ |
| enum dma_ring_reg { |
| TDMA_READ_PTR = 0, |
| RDMA_WRITE_PTR = TDMA_READ_PTR, |
| TDMA_READ_PTR_HI, |
| RDMA_WRITE_PTR_HI = TDMA_READ_PTR_HI, |
| TDMA_CONS_INDEX, |
| RDMA_PROD_INDEX = TDMA_CONS_INDEX, |
| TDMA_PROD_INDEX, |
| RDMA_CONS_INDEX = TDMA_PROD_INDEX, |
| DMA_RING_BUF_SIZE, |
| DMA_START_ADDR, |
| DMA_START_ADDR_HI, |
| DMA_END_ADDR, |
| DMA_END_ADDR_HI, |
| DMA_MBUF_DONE_THRESH, |
| TDMA_FLOW_PERIOD, |
| RDMA_XON_XOFF_THRESH = TDMA_FLOW_PERIOD, |
| TDMA_WRITE_PTR, |
| RDMA_READ_PTR = TDMA_WRITE_PTR, |
| TDMA_WRITE_PTR_HI, |
| RDMA_READ_PTR_HI = TDMA_WRITE_PTR_HI |
| }; |
| |
| /* GENET v4 supports 40-bits pointer addressing |
| * for obvious reasons the LO and HI word parts |
| * are contiguous, but this offsets the other |
| * registers. |
| */ |
| static const u8 genet_dma_ring_regs_v4[] = { |
| [TDMA_READ_PTR] = 0x00, |
| [TDMA_READ_PTR_HI] = 0x04, |
| [TDMA_CONS_INDEX] = 0x08, |
| [TDMA_PROD_INDEX] = 0x0C, |
| [DMA_RING_BUF_SIZE] = 0x10, |
| [DMA_START_ADDR] = 0x14, |
| [DMA_START_ADDR_HI] = 0x18, |
| [DMA_END_ADDR] = 0x1C, |
| [DMA_END_ADDR_HI] = 0x20, |
| [DMA_MBUF_DONE_THRESH] = 0x24, |
| [TDMA_FLOW_PERIOD] = 0x28, |
| [TDMA_WRITE_PTR] = 0x2C, |
| [TDMA_WRITE_PTR_HI] = 0x30, |
| }; |
| |
| static const u8 genet_dma_ring_regs_v123[] = { |
| [TDMA_READ_PTR] = 0x00, |
| [TDMA_CONS_INDEX] = 0x04, |
| [TDMA_PROD_INDEX] = 0x08, |
| [DMA_RING_BUF_SIZE] = 0x0C, |
| [DMA_START_ADDR] = 0x10, |
| [DMA_END_ADDR] = 0x14, |
| [DMA_MBUF_DONE_THRESH] = 0x18, |
| [TDMA_FLOW_PERIOD] = 0x1C, |
| [TDMA_WRITE_PTR] = 0x20, |
| }; |
| |
| /* Set at runtime once GENET version is known */ |
| static const u8 *genet_dma_ring_regs; |
| |
| static inline u32 bcmgenet_tdma_ring_readl(struct bcmgenet_priv *priv, |
| unsigned int ring, |
| enum dma_ring_reg r) |
| { |
| return __raw_readl(priv->base + GENET_TDMA_REG_OFF + |
| (DMA_RING_SIZE * ring) + |
| genet_dma_ring_regs[r]); |
| } |
| |
| static inline void bcmgenet_tdma_ring_writel(struct bcmgenet_priv *priv, |
| unsigned int ring, u32 val, |
| enum dma_ring_reg r) |
| { |
| __raw_writel(val, priv->base + GENET_TDMA_REG_OFF + |
| (DMA_RING_SIZE * ring) + |
| genet_dma_ring_regs[r]); |
| } |
| |
| static inline u32 bcmgenet_rdma_ring_readl(struct bcmgenet_priv *priv, |
| unsigned int ring, |
| enum dma_ring_reg r) |
| { |
| return __raw_readl(priv->base + GENET_RDMA_REG_OFF + |
| (DMA_RING_SIZE * ring) + |
| genet_dma_ring_regs[r]); |
| } |
| |
| static inline void bcmgenet_rdma_ring_writel(struct bcmgenet_priv *priv, |
| unsigned int ring, u32 val, |
| enum dma_ring_reg r) |
| { |
| __raw_writel(val, priv->base + GENET_RDMA_REG_OFF + |
| (DMA_RING_SIZE * ring) + |
| genet_dma_ring_regs[r]); |
| } |
| |
| static int bcmgenet_get_settings(struct net_device *dev, |
| struct ethtool_cmd *cmd) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| |
| if (!netif_running(dev)) |
| return -EINVAL; |
| |
| if (!priv->phydev) |
| return -ENODEV; |
| |
| return phy_ethtool_gset(priv->phydev, cmd); |
| } |
| |
| static int bcmgenet_set_settings(struct net_device *dev, |
| struct ethtool_cmd *cmd) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| |
| if (!netif_running(dev)) |
| return -EINVAL; |
| |
| if (!priv->phydev) |
| return -ENODEV; |
| |
| return phy_ethtool_sset(priv->phydev, cmd); |
| } |
| |
| static int bcmgenet_set_rx_csum(struct net_device *dev, |
| netdev_features_t wanted) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| u32 rbuf_chk_ctrl; |
| bool rx_csum_en; |
| |
| rx_csum_en = !!(wanted & NETIF_F_RXCSUM); |
| |
| rbuf_chk_ctrl = bcmgenet_rbuf_readl(priv, RBUF_CHK_CTRL); |
| |
| /* enable rx checksumming */ |
| if (rx_csum_en) |
| rbuf_chk_ctrl |= RBUF_RXCHK_EN; |
| else |
| rbuf_chk_ctrl &= ~RBUF_RXCHK_EN; |
| priv->desc_rxchk_en = rx_csum_en; |
| |
| /* If UniMAC forwards CRC, we need to skip over it to get |
| * a valid CHK bit to be set in the per-packet status word |
| */ |
| if (rx_csum_en && priv->crc_fwd_en) |
| rbuf_chk_ctrl |= RBUF_SKIP_FCS; |
| else |
| rbuf_chk_ctrl &= ~RBUF_SKIP_FCS; |
| |
| bcmgenet_rbuf_writel(priv, rbuf_chk_ctrl, RBUF_CHK_CTRL); |
| |
| return 0; |
| } |
| |
| static int bcmgenet_set_tx_csum(struct net_device *dev, |
| netdev_features_t wanted) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| bool desc_64b_en; |
| u32 tbuf_ctrl, rbuf_ctrl; |
| |
| tbuf_ctrl = bcmgenet_tbuf_ctrl_get(priv); |
| rbuf_ctrl = bcmgenet_rbuf_readl(priv, RBUF_CTRL); |
| |
| desc_64b_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)); |
| |
| /* enable 64 bytes descriptor in both directions (RBUF and TBUF) */ |
| if (desc_64b_en) { |
| tbuf_ctrl |= RBUF_64B_EN; |
| rbuf_ctrl |= RBUF_64B_EN; |
| } else { |
| tbuf_ctrl &= ~RBUF_64B_EN; |
| rbuf_ctrl &= ~RBUF_64B_EN; |
| } |
| priv->desc_64b_en = desc_64b_en; |
| |
| bcmgenet_tbuf_ctrl_set(priv, tbuf_ctrl); |
| bcmgenet_rbuf_writel(priv, rbuf_ctrl, RBUF_CTRL); |
| |
| return 0; |
| } |
| |
| static int bcmgenet_set_features(struct net_device *dev, |
| netdev_features_t features) |
| { |
| netdev_features_t changed = features ^ dev->features; |
| netdev_features_t wanted = dev->wanted_features; |
| int ret = 0; |
| |
| if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) |
| ret = bcmgenet_set_tx_csum(dev, wanted); |
| if (changed & (NETIF_F_RXCSUM)) |
| ret = bcmgenet_set_rx_csum(dev, wanted); |
| |
| return ret; |
| } |
| |
| static u32 bcmgenet_get_msglevel(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| |
| return priv->msg_enable; |
| } |
| |
| static void bcmgenet_set_msglevel(struct net_device *dev, u32 level) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| |
| priv->msg_enable = level; |
| } |
| |
| /* standard ethtool support functions. */ |
| enum bcmgenet_stat_type { |
| BCMGENET_STAT_NETDEV = -1, |
| BCMGENET_STAT_MIB_RX, |
| BCMGENET_STAT_MIB_TX, |
| BCMGENET_STAT_RUNT, |
| BCMGENET_STAT_MISC, |
| }; |
| |
| struct bcmgenet_stats { |
| char stat_string[ETH_GSTRING_LEN]; |
| int stat_sizeof; |
| int stat_offset; |
| enum bcmgenet_stat_type type; |
| /* reg offset from UMAC base for misc counters */ |
| u16 reg_offset; |
| }; |
| |
| #define STAT_NETDEV(m) { \ |
| .stat_string = __stringify(m), \ |
| .stat_sizeof = sizeof(((struct net_device_stats *)0)->m), \ |
| .stat_offset = offsetof(struct net_device_stats, m), \ |
| .type = BCMGENET_STAT_NETDEV, \ |
| } |
| |
| #define STAT_GENET_MIB(str, m, _type) { \ |
| .stat_string = str, \ |
| .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \ |
| .stat_offset = offsetof(struct bcmgenet_priv, m), \ |
| .type = _type, \ |
| } |
| |
| #define STAT_GENET_MIB_RX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_RX) |
| #define STAT_GENET_MIB_TX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_TX) |
| #define STAT_GENET_RUNT(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_RUNT) |
| |
| #define STAT_GENET_MISC(str, m, offset) { \ |
| .stat_string = str, \ |
| .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \ |
| .stat_offset = offsetof(struct bcmgenet_priv, m), \ |
| .type = BCMGENET_STAT_MISC, \ |
| .reg_offset = offset, \ |
| } |
| |
| |
| /* There is a 0xC gap between the end of RX and beginning of TX stats and then |
| * between the end of TX stats and the beginning of the RX RUNT |
| */ |
| #define BCMGENET_STAT_OFFSET 0xc |
| |
| /* Hardware counters must be kept in sync because the order/offset |
| * is important here (order in structure declaration = order in hardware) |
| */ |
| static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = { |
| /* general stats */ |
| STAT_NETDEV(rx_packets), |
| STAT_NETDEV(tx_packets), |
| STAT_NETDEV(rx_bytes), |
| STAT_NETDEV(tx_bytes), |
| STAT_NETDEV(rx_errors), |
| STAT_NETDEV(tx_errors), |
| STAT_NETDEV(rx_dropped), |
| STAT_NETDEV(tx_dropped), |
| STAT_NETDEV(multicast), |
| /* UniMAC RSV counters */ |
| STAT_GENET_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64), |
| STAT_GENET_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127), |
| STAT_GENET_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255), |
| STAT_GENET_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511), |
| STAT_GENET_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023), |
| STAT_GENET_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518), |
| STAT_GENET_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv), |
| STAT_GENET_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047), |
| STAT_GENET_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095), |
| STAT_GENET_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216), |
| STAT_GENET_MIB_RX("rx_pkts", mib.rx.pkt), |
| STAT_GENET_MIB_RX("rx_bytes", mib.rx.bytes), |
| STAT_GENET_MIB_RX("rx_multicast", mib.rx.mca), |
| STAT_GENET_MIB_RX("rx_broadcast", mib.rx.bca), |
| STAT_GENET_MIB_RX("rx_fcs", mib.rx.fcs), |
| STAT_GENET_MIB_RX("rx_control", mib.rx.cf), |
| STAT_GENET_MIB_RX("rx_pause", mib.rx.pf), |
| STAT_GENET_MIB_RX("rx_unknown", mib.rx.uo), |
| STAT_GENET_MIB_RX("rx_align", mib.rx.aln), |
| STAT_GENET_MIB_RX("rx_outrange", mib.rx.flr), |
| STAT_GENET_MIB_RX("rx_code", mib.rx.cde), |
| STAT_GENET_MIB_RX("rx_carrier", mib.rx.fcr), |
| STAT_GENET_MIB_RX("rx_oversize", mib.rx.ovr), |
| STAT_GENET_MIB_RX("rx_jabber", mib.rx.jbr), |
| STAT_GENET_MIB_RX("rx_mtu_err", mib.rx.mtue), |
| STAT_GENET_MIB_RX("rx_good_pkts", mib.rx.pok), |
| STAT_GENET_MIB_RX("rx_unicast", mib.rx.uc), |
| STAT_GENET_MIB_RX("rx_ppp", mib.rx.ppp), |
| STAT_GENET_MIB_RX("rx_crc", mib.rx.rcrc), |
| /* UniMAC TSV counters */ |
| STAT_GENET_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64), |
| STAT_GENET_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127), |
| STAT_GENET_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255), |
| STAT_GENET_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511), |
| STAT_GENET_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023), |
| STAT_GENET_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518), |
| STAT_GENET_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv), |
| STAT_GENET_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047), |
| STAT_GENET_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095), |
| STAT_GENET_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216), |
| STAT_GENET_MIB_TX("tx_pkts", mib.tx.pkts), |
| STAT_GENET_MIB_TX("tx_multicast", mib.tx.mca), |
| STAT_GENET_MIB_TX("tx_broadcast", mib.tx.bca), |
| STAT_GENET_MIB_TX("tx_pause", mib.tx.pf), |
| STAT_GENET_MIB_TX("tx_control", mib.tx.cf), |
| STAT_GENET_MIB_TX("tx_fcs_err", mib.tx.fcs), |
| STAT_GENET_MIB_TX("tx_oversize", mib.tx.ovr), |
| STAT_GENET_MIB_TX("tx_defer", mib.tx.drf), |
| STAT_GENET_MIB_TX("tx_excess_defer", mib.tx.edf), |
| STAT_GENET_MIB_TX("tx_single_col", mib.tx.scl), |
| STAT_GENET_MIB_TX("tx_multi_col", mib.tx.mcl), |
| STAT_GENET_MIB_TX("tx_late_col", mib.tx.lcl), |
| STAT_GENET_MIB_TX("tx_excess_col", mib.tx.ecl), |
| STAT_GENET_MIB_TX("tx_frags", mib.tx.frg), |
| STAT_GENET_MIB_TX("tx_total_col", mib.tx.ncl), |
| STAT_GENET_MIB_TX("tx_jabber", mib.tx.jbr), |
| STAT_GENET_MIB_TX("tx_bytes", mib.tx.bytes), |
| STAT_GENET_MIB_TX("tx_good_pkts", mib.tx.pok), |
| STAT_GENET_MIB_TX("tx_unicast", mib.tx.uc), |
| /* UniMAC RUNT counters */ |
| STAT_GENET_RUNT("rx_runt_pkts", mib.rx_runt_cnt), |
| STAT_GENET_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs), |
| STAT_GENET_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align), |
| STAT_GENET_RUNT("rx_runt_bytes", mib.rx_runt_bytes), |
| /* Misc UniMAC counters */ |
| STAT_GENET_MISC("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, |
| UMAC_RBUF_OVFL_CNT), |
| STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt, UMAC_RBUF_ERR_CNT), |
| STAT_GENET_MISC("mdf_err_cnt", mib.mdf_err_cnt, UMAC_MDF_ERR_CNT), |
| }; |
| |
| #define BCMGENET_STATS_LEN ARRAY_SIZE(bcmgenet_gstrings_stats) |
| |
| static void bcmgenet_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *info) |
| { |
| strlcpy(info->driver, "bcmgenet", sizeof(info->driver)); |
| strlcpy(info->version, "v2.0", sizeof(info->version)); |
| info->n_stats = BCMGENET_STATS_LEN; |
| } |
| |
| static int bcmgenet_get_sset_count(struct net_device *dev, int string_set) |
| { |
| switch (string_set) { |
| case ETH_SS_STATS: |
| return BCMGENET_STATS_LEN; |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static void bcmgenet_get_strings(struct net_device *dev, u32 stringset, |
| u8 *data) |
| { |
| int i; |
| |
| switch (stringset) { |
| case ETH_SS_STATS: |
| for (i = 0; i < BCMGENET_STATS_LEN; i++) { |
| memcpy(data + i * ETH_GSTRING_LEN, |
| bcmgenet_gstrings_stats[i].stat_string, |
| ETH_GSTRING_LEN); |
| } |
| break; |
| } |
| } |
| |
| static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv) |
| { |
| int i, j = 0; |
| |
| for (i = 0; i < BCMGENET_STATS_LEN; i++) { |
| const struct bcmgenet_stats *s; |
| u8 offset = 0; |
| u32 val = 0; |
| char *p; |
| |
| s = &bcmgenet_gstrings_stats[i]; |
| switch (s->type) { |
| case BCMGENET_STAT_NETDEV: |
| continue; |
| case BCMGENET_STAT_MIB_RX: |
| case BCMGENET_STAT_MIB_TX: |
| case BCMGENET_STAT_RUNT: |
| if (s->type != BCMGENET_STAT_MIB_RX) |
| offset = BCMGENET_STAT_OFFSET; |
| val = bcmgenet_umac_readl(priv, |
| UMAC_MIB_START + j + offset); |
| break; |
| case BCMGENET_STAT_MISC: |
| val = bcmgenet_umac_readl(priv, s->reg_offset); |
| /* clear if overflowed */ |
| if (val == ~0) |
| bcmgenet_umac_writel(priv, 0, s->reg_offset); |
| break; |
| } |
| |
| j += s->stat_sizeof; |
| p = (char *)priv + s->stat_offset; |
| *(u32 *)p = val; |
| } |
| } |
| |
| static void bcmgenet_get_ethtool_stats(struct net_device *dev, |
| struct ethtool_stats *stats, |
| u64 *data) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| int i; |
| |
| if (netif_running(dev)) |
| bcmgenet_update_mib_counters(priv); |
| |
| for (i = 0; i < BCMGENET_STATS_LEN; i++) { |
| const struct bcmgenet_stats *s; |
| char *p; |
| |
| s = &bcmgenet_gstrings_stats[i]; |
| if (s->type == BCMGENET_STAT_NETDEV) |
| p = (char *)&dev->stats; |
| else |
| p = (char *)priv; |
| p += s->stat_offset; |
| data[i] = *(u32 *)p; |
| } |
| } |
| |
| /* standard ethtool support functions. */ |
| static struct ethtool_ops bcmgenet_ethtool_ops = { |
| .get_strings = bcmgenet_get_strings, |
| .get_sset_count = bcmgenet_get_sset_count, |
| .get_ethtool_stats = bcmgenet_get_ethtool_stats, |
| .get_settings = bcmgenet_get_settings, |
| .set_settings = bcmgenet_set_settings, |
| .get_drvinfo = bcmgenet_get_drvinfo, |
| .get_link = ethtool_op_get_link, |
| .get_msglevel = bcmgenet_get_msglevel, |
| .set_msglevel = bcmgenet_set_msglevel, |
| .get_wol = bcmgenet_get_wol, |
| .set_wol = bcmgenet_set_wol, |
| }; |
| |
| /* Power down the unimac, based on mode. */ |
| static void bcmgenet_power_down(struct bcmgenet_priv *priv, |
| enum bcmgenet_power_mode mode) |
| { |
| u32 reg; |
| |
| switch (mode) { |
| case GENET_POWER_CABLE_SENSE: |
| phy_detach(priv->phydev); |
| break; |
| |
| case GENET_POWER_WOL_MAGIC: |
| bcmgenet_wol_power_down_cfg(priv, mode); |
| break; |
| |
| case GENET_POWER_PASSIVE: |
| /* Power down LED */ |
| bcmgenet_mii_reset(priv->dev); |
| if (priv->hw_params->flags & GENET_HAS_EXT) { |
| reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT); |
| reg |= (EXT_PWR_DOWN_PHY | |
| EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_BIAS); |
| bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void bcmgenet_power_up(struct bcmgenet_priv *priv, |
| enum bcmgenet_power_mode mode) |
| { |
| u32 reg; |
| |
| if (!(priv->hw_params->flags & GENET_HAS_EXT)) |
| return; |
| |
| reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT); |
| |
| switch (mode) { |
| case GENET_POWER_PASSIVE: |
| reg &= ~(EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_PHY | |
| EXT_PWR_DOWN_BIAS); |
| /* fallthrough */ |
| case GENET_POWER_CABLE_SENSE: |
| /* enable APD */ |
| reg |= EXT_PWR_DN_EN_LD; |
| break; |
| case GENET_POWER_WOL_MAGIC: |
| bcmgenet_wol_power_up_cfg(priv, mode); |
| return; |
| default: |
| break; |
| } |
| |
| bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT); |
| bcmgenet_mii_reset(priv->dev); |
| } |
| |
| /* ioctl handle special commands that are not present in ethtool. */ |
| static int bcmgenet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| int val = 0; |
| |
| if (!netif_running(dev)) |
| return -EINVAL; |
| |
| switch (cmd) { |
| case SIOCGMIIPHY: |
| case SIOCGMIIREG: |
| case SIOCSMIIREG: |
| if (!priv->phydev) |
| val = -ENODEV; |
| else |
| val = phy_mii_ioctl(priv->phydev, rq, cmd); |
| break; |
| |
| default: |
| val = -EINVAL; |
| break; |
| } |
| |
| return val; |
| } |
| |
| static struct enet_cb *bcmgenet_get_txcb(struct bcmgenet_priv *priv, |
| struct bcmgenet_tx_ring *ring) |
| { |
| struct enet_cb *tx_cb_ptr; |
| |
| tx_cb_ptr = ring->cbs; |
| tx_cb_ptr += ring->write_ptr - ring->cb_ptr; |
| tx_cb_ptr->bd_addr = priv->tx_bds + ring->write_ptr * DMA_DESC_SIZE; |
| /* Advancing local write pointer */ |
| if (ring->write_ptr == ring->end_ptr) |
| ring->write_ptr = ring->cb_ptr; |
| else |
| ring->write_ptr++; |
| |
| return tx_cb_ptr; |
| } |
| |
| /* Simple helper to free a control block's resources */ |
| static void bcmgenet_free_cb(struct enet_cb *cb) |
| { |
| dev_kfree_skb_any(cb->skb); |
| cb->skb = NULL; |
| dma_unmap_addr_set(cb, dma_addr, 0); |
| } |
| |
| static inline void bcmgenet_tx_ring16_int_disable(struct bcmgenet_priv *priv, |
| struct bcmgenet_tx_ring *ring) |
| { |
| bcmgenet_intrl2_0_writel(priv, |
| UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE, |
| INTRL2_CPU_MASK_SET); |
| } |
| |
| static inline void bcmgenet_tx_ring16_int_enable(struct bcmgenet_priv *priv, |
| struct bcmgenet_tx_ring *ring) |
| { |
| bcmgenet_intrl2_0_writel(priv, |
| UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE, |
| INTRL2_CPU_MASK_CLEAR); |
| } |
| |
| static inline void bcmgenet_tx_ring_int_enable(struct bcmgenet_priv *priv, |
| struct bcmgenet_tx_ring *ring) |
| { |
| bcmgenet_intrl2_1_writel(priv, (1 << ring->index), |
| INTRL2_CPU_MASK_CLEAR); |
| priv->int1_mask &= ~(1 << ring->index); |
| } |
| |
| static inline void bcmgenet_tx_ring_int_disable(struct bcmgenet_priv *priv, |
| struct bcmgenet_tx_ring *ring) |
| { |
| bcmgenet_intrl2_1_writel(priv, (1 << ring->index), |
| INTRL2_CPU_MASK_SET); |
| priv->int1_mask |= (1 << ring->index); |
| } |
| |
| /* Unlocked version of the reclaim routine */ |
| static void __bcmgenet_tx_reclaim(struct net_device *dev, |
| struct bcmgenet_tx_ring *ring) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| int last_tx_cn, last_c_index, num_tx_bds; |
| struct enet_cb *tx_cb_ptr; |
| struct netdev_queue *txq; |
| unsigned int c_index; |
| |
| /* Compute how many buffers are transmitted since last xmit call */ |
| c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX); |
| txq = netdev_get_tx_queue(dev, ring->queue); |
| |
| last_c_index = ring->c_index; |
| num_tx_bds = ring->size; |
| |
| c_index &= (num_tx_bds - 1); |
| |
| if (c_index >= last_c_index) |
| last_tx_cn = c_index - last_c_index; |
| else |
| last_tx_cn = num_tx_bds - last_c_index + c_index; |
| |
| netif_dbg(priv, tx_done, dev, |
| "%s ring=%d index=%d last_tx_cn=%d last_index=%d\n", |
| __func__, ring->index, |
| c_index, last_tx_cn, last_c_index); |
| |
| /* Reclaim transmitted buffers */ |
| while (last_tx_cn-- > 0) { |
| tx_cb_ptr = ring->cbs + last_c_index; |
| if (tx_cb_ptr->skb) { |
| dev->stats.tx_bytes += tx_cb_ptr->skb->len; |
| dma_unmap_single(&dev->dev, |
| dma_unmap_addr(tx_cb_ptr, dma_addr), |
| tx_cb_ptr->skb->len, |
| DMA_TO_DEVICE); |
| bcmgenet_free_cb(tx_cb_ptr); |
| } else if (dma_unmap_addr(tx_cb_ptr, dma_addr)) { |
| dev->stats.tx_bytes += |
| dma_unmap_len(tx_cb_ptr, dma_len); |
| dma_unmap_page(&dev->dev, |
| dma_unmap_addr(tx_cb_ptr, dma_addr), |
| dma_unmap_len(tx_cb_ptr, dma_len), |
| DMA_TO_DEVICE); |
| dma_unmap_addr_set(tx_cb_ptr, dma_addr, 0); |
| } |
| dev->stats.tx_packets++; |
| ring->free_bds += 1; |
| |
| last_c_index++; |
| last_c_index &= (num_tx_bds - 1); |
| } |
| |
| if (ring->free_bds > (MAX_SKB_FRAGS + 1)) |
| ring->int_disable(priv, ring); |
| |
| if (netif_tx_queue_stopped(txq)) |
| netif_tx_wake_queue(txq); |
| |
| ring->c_index = c_index; |
| } |
| |
| static void bcmgenet_tx_reclaim(struct net_device *dev, |
| struct bcmgenet_tx_ring *ring) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ring->lock, flags); |
| __bcmgenet_tx_reclaim(dev, ring); |
| spin_unlock_irqrestore(&ring->lock, flags); |
| } |
| |
| static void bcmgenet_tx_reclaim_all(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| int i; |
| |
| if (netif_is_multiqueue(dev)) { |
| for (i = 0; i < priv->hw_params->tx_queues; i++) |
| bcmgenet_tx_reclaim(dev, &priv->tx_rings[i]); |
| } |
| |
| bcmgenet_tx_reclaim(dev, &priv->tx_rings[DESC_INDEX]); |
| } |
| |
| /* Transmits a single SKB (either head of a fragment or a single SKB) |
| * caller must hold priv->lock |
| */ |
| static int bcmgenet_xmit_single(struct net_device *dev, |
| struct sk_buff *skb, |
| u16 dma_desc_flags, |
| struct bcmgenet_tx_ring *ring) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| struct device *kdev = &priv->pdev->dev; |
| struct enet_cb *tx_cb_ptr; |
| unsigned int skb_len; |
| dma_addr_t mapping; |
| u32 length_status; |
| int ret; |
| |
| tx_cb_ptr = bcmgenet_get_txcb(priv, ring); |
| |
| if (unlikely(!tx_cb_ptr)) |
| BUG(); |
| |
| tx_cb_ptr->skb = skb; |
| |
| skb_len = skb_headlen(skb) < ETH_ZLEN ? ETH_ZLEN : skb_headlen(skb); |
| |
| mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE); |
| ret = dma_mapping_error(kdev, mapping); |
| if (ret) { |
| netif_err(priv, tx_err, dev, "Tx DMA map failed\n"); |
| dev_kfree_skb(skb); |
| return ret; |
| } |
| |
| dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping); |
| dma_unmap_len_set(tx_cb_ptr, dma_len, skb->len); |
| length_status = (skb_len << DMA_BUFLENGTH_SHIFT) | dma_desc_flags | |
| (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT) | |
| DMA_TX_APPEND_CRC; |
| |
| if (skb->ip_summed == CHECKSUM_PARTIAL) |
| length_status |= DMA_TX_DO_CSUM; |
| |
| dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping, length_status); |
| |
| /* Decrement total BD count and advance our write pointer */ |
| ring->free_bds -= 1; |
| ring->prod_index += 1; |
| ring->prod_index &= DMA_P_INDEX_MASK; |
| |
| return 0; |
| } |
| |
| /* Transmit a SKB fragment */ |
| static int bcmgenet_xmit_frag(struct net_device *dev, |
| skb_frag_t *frag, |
| u16 dma_desc_flags, |
| struct bcmgenet_tx_ring *ring) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| struct device *kdev = &priv->pdev->dev; |
| struct enet_cb *tx_cb_ptr; |
| dma_addr_t mapping; |
| int ret; |
| |
| tx_cb_ptr = bcmgenet_get_txcb(priv, ring); |
| |
| if (unlikely(!tx_cb_ptr)) |
| BUG(); |
| tx_cb_ptr->skb = NULL; |
| |
| mapping = skb_frag_dma_map(kdev, frag, 0, |
| skb_frag_size(frag), DMA_TO_DEVICE); |
| ret = dma_mapping_error(kdev, mapping); |
| if (ret) { |
| netif_err(priv, tx_err, dev, "%s: Tx DMA map failed\n", |
| __func__); |
| return ret; |
| } |
| |
| dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping); |
| dma_unmap_len_set(tx_cb_ptr, dma_len, frag->size); |
| |
| dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping, |
| (frag->size << DMA_BUFLENGTH_SHIFT) | dma_desc_flags | |
| (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT)); |
| |
| |
| ring->free_bds -= 1; |
| ring->prod_index += 1; |
| ring->prod_index &= DMA_P_INDEX_MASK; |
| |
| return 0; |
| } |
| |
| /* Reallocate the SKB to put enough headroom in front of it and insert |
| * the transmit checksum offsets in the descriptors |
| */ |
| static int bcmgenet_put_tx_csum(struct net_device *dev, struct sk_buff *skb) |
| { |
| struct status_64 *status = NULL; |
| struct sk_buff *new_skb; |
| u16 offset; |
| u8 ip_proto; |
| u16 ip_ver; |
| u32 tx_csum_info; |
| |
| if (unlikely(skb_headroom(skb) < sizeof(*status))) { |
| /* If 64 byte status block enabled, must make sure skb has |
| * enough headroom for us to insert 64B status block. |
| */ |
| new_skb = skb_realloc_headroom(skb, sizeof(*status)); |
| dev_kfree_skb(skb); |
| if (!new_skb) { |
| dev->stats.tx_errors++; |
| dev->stats.tx_dropped++; |
| return -ENOMEM; |
| } |
| skb = new_skb; |
| } |
| |
| skb_push(skb, sizeof(*status)); |
| status = (struct status_64 *)skb->data; |
| |
| 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; |
| } |
| |
| offset = skb_checksum_start_offset(skb) - sizeof(*status); |
| tx_csum_info = (offset << STATUS_TX_CSUM_START_SHIFT) | |
| (offset + skb->csum_offset); |
| |
| /* Set the length valid bit for TCP and UDP and just set |
| * the special UDP flag for IPv4, else just set to 0. |
| */ |
| if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) { |
| tx_csum_info |= STATUS_TX_CSUM_LV; |
| if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP) |
| tx_csum_info |= STATUS_TX_CSUM_PROTO_UDP; |
| } else { |
| tx_csum_info = 0; |
| } |
| |
| status->tx_csum_info = tx_csum_info; |
| } |
| |
| return 0; |
| } |
| |
| static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| struct bcmgenet_tx_ring *ring = NULL; |
| struct netdev_queue *txq; |
| unsigned long flags = 0; |
| int nr_frags, index; |
| u16 dma_desc_flags; |
| int ret; |
| int i; |
| |
| index = skb_get_queue_mapping(skb); |
| /* Mapping strategy: |
| * queue_mapping = 0, unclassified, packet xmited through ring16 |
| * queue_mapping = 1, goes to ring 0. (highest priority queue |
| * queue_mapping = 2, goes to ring 1. |
| * queue_mapping = 3, goes to ring 2. |
| * queue_mapping = 4, goes to ring 3. |
| */ |
| if (index == 0) |
| index = DESC_INDEX; |
| else |
| index -= 1; |
| |
| nr_frags = skb_shinfo(skb)->nr_frags; |
| ring = &priv->tx_rings[index]; |
| txq = netdev_get_tx_queue(dev, ring->queue); |
| |
| spin_lock_irqsave(&ring->lock, flags); |
| if (ring->free_bds <= nr_frags + 1) { |
| netif_tx_stop_queue(txq); |
| netdev_err(dev, "%s: tx ring %d full when queue %d awake\n", |
| __func__, index, ring->queue); |
| ret = NETDEV_TX_BUSY; |
| goto out; |
| } |
| |
| if (skb_padto(skb, ETH_ZLEN)) { |
| ret = NETDEV_TX_OK; |
| goto out; |
| } |
| |
| /* set the SKB transmit checksum */ |
| if (priv->desc_64b_en) { |
| ret = bcmgenet_put_tx_csum(dev, skb); |
| if (ret) { |
| ret = NETDEV_TX_OK; |
| goto out; |
| } |
| } |
| |
| dma_desc_flags = DMA_SOP; |
| if (nr_frags == 0) |
| dma_desc_flags |= DMA_EOP; |
| |
| /* Transmit single SKB or head of fragment list */ |
| ret = bcmgenet_xmit_single(dev, skb, dma_desc_flags, ring); |
| if (ret) { |
| ret = NETDEV_TX_OK; |
| goto out; |
| } |
| |
| /* xmit fragment */ |
| for (i = 0; i < nr_frags; i++) { |
| ret = bcmgenet_xmit_frag(dev, |
| &skb_shinfo(skb)->frags[i], |
| (i == nr_frags - 1) ? DMA_EOP : 0, |
| ring); |
| if (ret) { |
| ret = NETDEV_TX_OK; |
| goto out; |
| } |
| } |
| |
| skb_tx_timestamp(skb); |
| |
| /* we kept a software copy of how much we should advance the TDMA |
| * producer index, now write it down to the hardware |
| */ |
| bcmgenet_tdma_ring_writel(priv, ring->index, |
| ring->prod_index, TDMA_PROD_INDEX); |
| |
| if (ring->free_bds <= (MAX_SKB_FRAGS + 1)) { |
| netif_tx_stop_queue(txq); |
| ring->int_enable(priv, ring); |
| } |
| |
| out: |
| spin_unlock_irqrestore(&ring->lock, flags); |
| |
| return ret; |
| } |
| |
| |
| static int bcmgenet_rx_refill(struct bcmgenet_priv *priv, struct enet_cb *cb) |
| { |
| struct device *kdev = &priv->pdev->dev; |
| struct sk_buff *skb; |
| dma_addr_t mapping; |
| int ret; |
| |
| skb = netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT); |
| if (!skb) |
| return -ENOMEM; |
| |
| /* a caller did not release this control block */ |
| WARN_ON(cb->skb != NULL); |
| cb->skb = skb; |
| mapping = dma_map_single(kdev, skb->data, |
| priv->rx_buf_len, DMA_FROM_DEVICE); |
| ret = dma_mapping_error(kdev, mapping); |
| if (ret) { |
| bcmgenet_free_cb(cb); |
| netif_err(priv, rx_err, priv->dev, |
| "%s DMA map failed\n", __func__); |
| return ret; |
| } |
| |
| dma_unmap_addr_set(cb, dma_addr, mapping); |
| /* assign packet, prepare descriptor, and advance pointer */ |
| |
| dmadesc_set_addr(priv, priv->rx_bd_assign_ptr, mapping); |
| |
| /* turn on the newly assigned BD for DMA to use */ |
| 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 * DMA_DESC_SIZE); |
| |
| return 0; |
| } |
| |
| /* bcmgenet_desc_rx - descriptor based rx process. |
| * this could be called from bottom half, or from NAPI polling method. |
| */ |
| static unsigned int bcmgenet_desc_rx(struct bcmgenet_priv *priv, |
| unsigned int budget) |
| { |
| struct net_device *dev = priv->dev; |
| struct enet_cb *cb; |
| struct sk_buff *skb; |
| u32 dma_length_status; |
| unsigned long dma_flag; |
| int len, err; |
| unsigned int rxpktprocessed = 0, rxpkttoprocess; |
| unsigned int p_index; |
| unsigned int chksum_ok = 0; |
| |
| p_index = bcmgenet_rdma_ring_readl(priv, DESC_INDEX, RDMA_PROD_INDEX); |
| p_index &= DMA_P_INDEX_MASK; |
| |
| if (p_index < priv->rx_c_index) |
| rxpkttoprocess = (DMA_C_INDEX_MASK + 1) - |
| priv->rx_c_index + p_index; |
| else |
| rxpkttoprocess = p_index - priv->rx_c_index; |
| |
| netif_dbg(priv, rx_status, dev, |
| "RDMA: rxpkttoprocess=%d\n", rxpkttoprocess); |
| |
| while ((rxpktprocessed < rxpkttoprocess) && |
| (rxpktprocessed < budget)) { |
| /* Unmap the packet contents such that we can use the |
| * RSV from the 64 bytes descriptor when enabled and save |
| * a 32-bits register read |
| */ |
| cb = &priv->rx_cbs[priv->rx_read_ptr]; |
| skb = cb->skb; |
| dma_unmap_single(&dev->dev, dma_unmap_addr(cb, dma_addr), |
| priv->rx_buf_len, DMA_FROM_DEVICE); |
| |
| if (!priv->desc_64b_en) { |
| dma_length_status = |
| dmadesc_get_length_status(priv, |
| priv->rx_bds + |
| (priv->rx_read_ptr * |
| DMA_DESC_SIZE)); |
| } else { |
| struct status_64 *status; |
| |
| status = (struct status_64 *)skb->data; |
| dma_length_status = status->length_status; |
| } |
| |
| /* DMA flags and length are still valid no matter how |
| * we got the Receive Status Vector (64B RSB or register) |
| */ |
| dma_flag = dma_length_status & 0xffff; |
| len = dma_length_status >> DMA_BUFLENGTH_SHIFT; |
| |
| netif_dbg(priv, rx_status, dev, |
| "%s:p_ind=%d c_ind=%d read_ptr=%d len_stat=0x%08x\n", |
| __func__, p_index, priv->rx_c_index, |
| priv->rx_read_ptr, dma_length_status); |
| |
| rxpktprocessed++; |
| |
| priv->rx_read_ptr++; |
| priv->rx_read_ptr &= (priv->num_rx_bds - 1); |
| |
| /* out of memory, just drop packets at the hardware level */ |
| if (unlikely(!skb)) { |
| dev->stats.rx_dropped++; |
| dev->stats.rx_errors++; |
| goto refill; |
| } |
| |
| if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) { |
| netif_err(priv, rx_status, dev, |
| "dropping fragmented packet!\n"); |
| dev->stats.rx_dropped++; |
| dev->stats.rx_errors++; |
| dev_kfree_skb_any(cb->skb); |
| cb->skb = NULL; |
| goto refill; |
| } |
| /* report errors */ |
| if (unlikely(dma_flag & (DMA_RX_CRC_ERROR | |
| DMA_RX_OV | |
| DMA_RX_NO | |
| DMA_RX_LG | |
| DMA_RX_RXER))) { |
| netif_err(priv, rx_status, dev, "dma_flag=0x%x\n", |
| (unsigned int)dma_flag); |
| if (dma_flag & DMA_RX_CRC_ERROR) |
| dev->stats.rx_crc_errors++; |
| if (dma_flag & DMA_RX_OV) |
| dev->stats.rx_over_errors++; |
| if (dma_flag & DMA_RX_NO) |
| dev->stats.rx_frame_errors++; |
| if (dma_flag & DMA_RX_LG) |
| dev->stats.rx_length_errors++; |
| dev->stats.rx_dropped++; |
| dev->stats.rx_errors++; |
| |
| /* discard the packet and advance consumer index.*/ |
| dev_kfree_skb_any(cb->skb); |
| cb->skb = NULL; |
| goto refill; |
| } /* error packet */ |
| |
| chksum_ok = (dma_flag & priv->dma_rx_chk_bit) && |
| priv->desc_rxchk_en; |
| |
| skb_put(skb, len); |
| if (priv->desc_64b_en) { |
| skb_pull(skb, 64); |
| len -= 64; |
| } |
| |
| if (likely(chksum_ok)) |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| |
| /* remove hardware 2bytes added for IP alignment */ |
| skb_pull(skb, 2); |
| len -= 2; |
| |
| if (priv->crc_fwd_en) { |
| skb_trim(skb, len - ETH_FCS_LEN); |
| len -= ETH_FCS_LEN; |
| } |
| |
| /*Finish setting up the received SKB and send it to the kernel*/ |
| skb->protocol = eth_type_trans(skb, priv->dev); |
| dev->stats.rx_packets++; |
| dev->stats.rx_bytes += len; |
| if (dma_flag & DMA_RX_MULT) |
| dev->stats.multicast++; |
| |
| /* Notify kernel */ |
| napi_gro_receive(&priv->napi, skb); |
| cb->skb = NULL; |
| netif_dbg(priv, rx_status, dev, "pushed up to kernel\n"); |
| |
| /* refill RX path on the current control block */ |
| refill: |
| err = bcmgenet_rx_refill(priv, cb); |
| if (err) |
| netif_err(priv, rx_err, dev, "Rx refill failed\n"); |
| } |
| |
| return rxpktprocessed; |
| } |
| |
| /* Assign skb to RX DMA descriptor. */ |
| static int bcmgenet_alloc_rx_buffers(struct bcmgenet_priv *priv) |
| { |
| struct enet_cb *cb; |
| int ret = 0; |
| int i; |
| |
| netif_dbg(priv, hw, priv->dev, "%s:\n", __func__); |
| |
| /* loop here for each buffer needing assign */ |
| for (i = 0; i < priv->num_rx_bds; i++) { |
| cb = &priv->rx_cbs[priv->rx_bd_assign_index]; |
| if (cb->skb) |
| continue; |
| |
| ret = bcmgenet_rx_refill(priv, cb); |
| if (ret) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static void bcmgenet_free_rx_buffers(struct bcmgenet_priv *priv) |
| { |
| struct enet_cb *cb; |
| int i; |
| |
| 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->dev->dev, |
| dma_unmap_addr(cb, dma_addr), |
| priv->rx_buf_len, DMA_FROM_DEVICE); |
| dma_unmap_addr_set(cb, dma_addr, 0); |
| } |
| |
| if (cb->skb) |
| bcmgenet_free_cb(cb); |
| } |
| } |
| |
| static void umac_enable_set(struct bcmgenet_priv *priv, u32 mask, bool enable) |
| { |
| u32 reg; |
| |
| reg = bcmgenet_umac_readl(priv, UMAC_CMD); |
| if (enable) |
| reg |= mask; |
| else |
| reg &= ~mask; |
| bcmgenet_umac_writel(priv, reg, UMAC_CMD); |
| |
| /* UniMAC stops on a packet boundary, wait for a full-size packet |
| * to be processed |
| */ |
| if (enable == 0) |
| usleep_range(1000, 2000); |
| } |
| |
| static int reset_umac(struct bcmgenet_priv *priv) |
| { |
| struct device *kdev = &priv->pdev->dev; |
| unsigned int timeout = 0; |
| u32 reg; |
| |
| /* 7358a0/7552a0: bad default in RBUF_FLUSH_CTRL.umac_sw_rst */ |
| bcmgenet_rbuf_ctrl_set(priv, 0); |
| udelay(10); |
| |
| /* disable MAC while updating its registers */ |
| bcmgenet_umac_writel(priv, 0, UMAC_CMD); |
| |
| /* issue soft reset, wait for it to complete */ |
| bcmgenet_umac_writel(priv, CMD_SW_RESET, UMAC_CMD); |
| while (timeout++ < 1000) { |
| reg = bcmgenet_umac_readl(priv, UMAC_CMD); |
| if (!(reg & CMD_SW_RESET)) |
| return 0; |
| |
| udelay(1); |
| } |
| |
| if (timeout == 1000) { |
| dev_err(kdev, |
| "timeout waiting for MAC to come out of reset\n"); |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| } |
| |
| static void bcmgenet_intr_disable(struct bcmgenet_priv *priv) |
| { |
| /* Mask all interrupts.*/ |
| bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET); |
| bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR); |
| bcmgenet_intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR); |
| bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET); |
| bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR); |
| bcmgenet_intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR); |
| } |
| |
| static int init_umac(struct bcmgenet_priv *priv) |
| { |
| struct device *kdev = &priv->pdev->dev; |
| int ret; |
| u32 reg, cpu_mask_clear; |
| |
| dev_dbg(&priv->pdev->dev, "bcmgenet: init_umac\n"); |
| |
| ret = reset_umac(priv); |
| if (ret) |
| return ret; |
| |
| bcmgenet_umac_writel(priv, 0, UMAC_CMD); |
| /* clear tx/rx counter */ |
| bcmgenet_umac_writel(priv, |
| MIB_RESET_RX | MIB_RESET_TX | MIB_RESET_RUNT, |
| UMAC_MIB_CTRL); |
| bcmgenet_umac_writel(priv, 0, UMAC_MIB_CTRL); |
| |
| bcmgenet_umac_writel(priv, ENET_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); |
| |
| /* init rx registers, enable ip header optimization */ |
| reg = bcmgenet_rbuf_readl(priv, RBUF_CTRL); |
| reg |= RBUF_ALIGN_2B; |
| bcmgenet_rbuf_writel(priv, reg, RBUF_CTRL); |
| |
| if (!GENET_IS_V1(priv) && !GENET_IS_V2(priv)) |
| bcmgenet_rbuf_writel(priv, 1, RBUF_TBUF_SIZE_CTRL); |
| |
| bcmgenet_intr_disable(priv); |
| |
| cpu_mask_clear = UMAC_IRQ_RXDMA_BDONE; |
| |
| dev_dbg(kdev, "%s:Enabling RXDMA_BDONE interrupt\n", __func__); |
| |
| /* Monitor cable plug/unplugged event for internal PHY */ |
| if (phy_is_internal(priv->phydev)) { |
| cpu_mask_clear |= (UMAC_IRQ_LINK_DOWN | UMAC_IRQ_LINK_UP); |
| } else if (priv->ext_phy) { |
| cpu_mask_clear |= (UMAC_IRQ_LINK_DOWN | UMAC_IRQ_LINK_UP); |
| } else if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) { |
| reg = bcmgenet_bp_mc_get(priv); |
| reg |= BIT(priv->hw_params->bp_in_en_shift); |
| |
| /* bp_mask: back pressure mask */ |
| if (netif_is_multiqueue(priv->dev)) |
| reg |= priv->hw_params->bp_in_mask; |
| else |
| reg &= ~priv->hw_params->bp_in_mask; |
| bcmgenet_bp_mc_set(priv, reg); |
| } |
| |
| /* Enable MDIO interrupts on GENET v3+ */ |
| if (priv->hw_params->flags & GENET_HAS_MDIO_INTR) |
| cpu_mask_clear |= UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR; |
| |
| bcmgenet_intrl2_0_writel(priv, cpu_mask_clear, INTRL2_CPU_MASK_CLEAR); |
| |
| /* Enable rx/tx engine.*/ |
| dev_dbg(kdev, "done init umac\n"); |
| |
| return 0; |
| } |
| |
| /* Initialize all house-keeping variables for a TX ring, along |
| * with corresponding hardware registers |
| */ |
| static void bcmgenet_init_tx_ring(struct bcmgenet_priv *priv, |
| unsigned int index, unsigned int size, |
| unsigned int write_ptr, unsigned int end_ptr) |
| { |
| struct bcmgenet_tx_ring *ring = &priv->tx_rings[index]; |
| u32 words_per_bd = WORDS_PER_BD(priv); |
| u32 flow_period_val = 0; |
| unsigned int first_bd; |
| |
| spin_lock_init(&ring->lock); |
| ring->index = index; |
| if (index == DESC_INDEX) { |
| ring->queue = 0; |
| ring->int_enable = bcmgenet_tx_ring16_int_enable; |
| ring->int_disable = bcmgenet_tx_ring16_int_disable; |
| } else { |
| ring->queue = index + 1; |
| ring->int_enable = bcmgenet_tx_ring_int_enable; |
| ring->int_disable = bcmgenet_tx_ring_int_disable; |
| } |
| ring->cbs = priv->tx_cbs + write_ptr; |
| ring->size = size; |
| ring->c_index = 0; |
| ring->free_bds = size; |
| ring->write_ptr = write_ptr; |
| ring->cb_ptr = write_ptr; |
| ring->end_ptr = end_ptr - 1; |
| ring->prod_index = 0; |
| |
| /* Set flow period for ring != 16 */ |
| if (index != DESC_INDEX) |
| flow_period_val = ENET_MAX_MTU_SIZE << 16; |
| |
| bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_PROD_INDEX); |
| bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_CONS_INDEX); |
| bcmgenet_tdma_ring_writel(priv, index, 1, DMA_MBUF_DONE_THRESH); |
| /* Disable rate control for now */ |
| bcmgenet_tdma_ring_writel(priv, index, flow_period_val, |
| TDMA_FLOW_PERIOD); |
| /* Unclassified traffic goes to ring 16 */ |
| bcmgenet_tdma_ring_writel(priv, index, |
| ((size << DMA_RING_SIZE_SHIFT) | |
| RX_BUF_LENGTH), DMA_RING_BUF_SIZE); |
| |
| first_bd = write_ptr; |
| |
| /* Set start and end address, read and write pointers */ |
| bcmgenet_tdma_ring_writel(priv, index, first_bd * words_per_bd, |
| DMA_START_ADDR); |
| bcmgenet_tdma_ring_writel(priv, index, first_bd * words_per_bd, |
| TDMA_READ_PTR); |
| bcmgenet_tdma_ring_writel(priv, index, first_bd, |
| TDMA_WRITE_PTR); |
| bcmgenet_tdma_ring_writel(priv, index, end_ptr * words_per_bd - 1, |
| DMA_END_ADDR); |
| } |
| |
| /* Initialize a RDMA ring */ |
| static int bcmgenet_init_rx_ring(struct bcmgenet_priv *priv, |
| unsigned int index, unsigned int size) |
| { |
| u32 words_per_bd = WORDS_PER_BD(priv); |
| int ret; |
| |
| priv->num_rx_bds = TOTAL_DESC; |
| priv->rx_bds = priv->base + priv->hw_params->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 enet_cb), |
| GFP_KERNEL); |
| if (!priv->rx_cbs) |
| return -ENOMEM; |
| |
| ret = bcmgenet_alloc_rx_buffers(priv); |
| if (ret) { |
| kfree(priv->rx_cbs); |
| return ret; |
| } |
| |
| bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_WRITE_PTR); |
| bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_PROD_INDEX); |
| bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_CONS_INDEX); |
| bcmgenet_rdma_ring_writel(priv, index, |
| ((size << DMA_RING_SIZE_SHIFT) | |
| RX_BUF_LENGTH), DMA_RING_BUF_SIZE); |
| bcmgenet_rdma_ring_writel(priv, index, 0, DMA_START_ADDR); |
| bcmgenet_rdma_ring_writel(priv, index, |
| words_per_bd * size - 1, DMA_END_ADDR); |
| bcmgenet_rdma_ring_writel(priv, index, |
| (DMA_FC_THRESH_LO << |
| DMA_XOFF_THRESHOLD_SHIFT) | |
| DMA_FC_THRESH_HI, RDMA_XON_XOFF_THRESH); |
| bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_READ_PTR); |
| |
| return ret; |
| } |
| |
| /* init multi xmit queues, only available for GENET2+ |
| * the queue is partitioned as follows: |
| * |
| * queue 0 - 3 is priority based, each one has 32 descriptors, |
| * with queue 0 being the highest priority queue. |
| * |
| * queue 16 is the default tx queue with GENET_DEFAULT_BD_CNT |
| * descriptors: 256 - (number of tx queues * bds per queues) = 128 |
| * descriptors. |
| * |
| * The transmit control block pool is then partitioned as following: |
| * - tx_cbs[0...127] are for queue 16 |
| * - tx_ring_cbs[0] points to tx_cbs[128..159] |
| * - tx_ring_cbs[1] points to tx_cbs[160..191] |
| * - tx_ring_cbs[2] points to tx_cbs[192..223] |
| * - tx_ring_cbs[3] points to tx_cbs[224..255] |
| */ |
| static void bcmgenet_init_multiq(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| unsigned int i, dma_enable; |
| u32 reg, dma_ctrl, ring_cfg = 0, dma_priority = 0; |
| |
| if (!netif_is_multiqueue(dev)) { |
| netdev_warn(dev, "called with non multi queue aware HW\n"); |
| return; |
| } |
| |
| dma_ctrl = bcmgenet_tdma_readl(priv, DMA_CTRL); |
| dma_enable = dma_ctrl & DMA_EN; |
| dma_ctrl &= ~DMA_EN; |
| bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL); |
| |
| /* Enable strict priority arbiter mode */ |
| bcmgenet_tdma_writel(priv, DMA_ARBITER_SP, DMA_ARB_CTRL); |
| |
| for (i = 0; i < priv->hw_params->tx_queues; i++) { |
| /* first 64 tx_cbs are reserved for default tx queue |
| * (ring 16) |
| */ |
| bcmgenet_init_tx_ring(priv, i, priv->hw_params->bds_cnt, |
| i * priv->hw_params->bds_cnt, |
| (i + 1) * priv->hw_params->bds_cnt); |
| |
| /* Configure ring as descriptor ring and setup priority */ |
| ring_cfg |= 1 << i; |
| dma_priority |= ((GENET_Q0_PRIORITY + i) << |
| (GENET_MAX_MQ_CNT + 1) * i); |
| dma_ctrl |= 1 << (i + DMA_RING_BUF_EN_SHIFT); |
| } |
| |
| /* Enable rings */ |
| reg = bcmgenet_tdma_readl(priv, DMA_RING_CFG); |
| reg |= ring_cfg; |
| bcmgenet_tdma_writel(priv, reg, DMA_RING_CFG); |
| |
| /* Use configured rings priority and set ring #16 priority */ |
| reg = bcmgenet_tdma_readl(priv, DMA_RING_PRIORITY); |
| reg |= ((GENET_Q0_PRIORITY + priv->hw_params->tx_queues) << 20); |
| reg |= dma_priority; |
| bcmgenet_tdma_writel(priv, reg, DMA_PRIORITY); |
| |
| /* Configure ring as descriptor ring and re-enable DMA if enabled */ |
| reg = bcmgenet_tdma_readl(priv, DMA_CTRL); |
| reg |= dma_ctrl; |
| if (dma_enable) |
| reg |= DMA_EN; |
| bcmgenet_tdma_writel(priv, reg, DMA_CTRL); |
| } |
| |
| static void bcmgenet_fini_dma(struct bcmgenet_priv *priv) |
| { |
| int i; |
| |
| /* disable DMA */ |
| bcmgenet_rdma_writel(priv, 0, DMA_CTRL); |
| bcmgenet_tdma_writel(priv, 0, DMA_CTRL); |
| |
| for (i = 0; i < priv->num_tx_bds; i++) { |
| if (priv->tx_cbs[i].skb != NULL) { |
| dev_kfree_skb(priv->tx_cbs[i].skb); |
| priv->tx_cbs[i].skb = NULL; |
| } |
| } |
| |
| bcmgenet_free_rx_buffers(priv); |
| kfree(priv->rx_cbs); |
| kfree(priv->tx_cbs); |
| } |
| |
| /* init_edma: Initialize DMA control register */ |
| static int bcmgenet_init_dma(struct bcmgenet_priv *priv) |
| { |
| int ret; |
| |
| netif_dbg(priv, hw, priv->dev, "bcmgenet: init_edma\n"); |
| |
| /* by default, enable ring 16 (descriptor based) */ |
| ret = bcmgenet_init_rx_ring(priv, DESC_INDEX, TOTAL_DESC); |
| if (ret) { |
| netdev_err(priv->dev, "failed to initialize RX ring\n"); |
| return ret; |
| } |
| |
| /* init rDma */ |
| bcmgenet_rdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE); |
| |
| /* Init tDma */ |
| bcmgenet_tdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE); |
| |
| /* Initialize common TX ring structures */ |
| priv->tx_bds = priv->base + priv->hw_params->tdma_offset; |
| priv->num_tx_bds = TOTAL_DESC; |
| priv->tx_cbs = kcalloc(priv->num_tx_bds, sizeof(struct enet_cb), |
| GFP_KERNEL); |
| if (!priv->tx_cbs) { |
| bcmgenet_fini_dma(priv); |
| return -ENOMEM; |
| } |
| |
| /* initialize multi xmit queue */ |
| bcmgenet_init_multiq(priv->dev); |
| |
| /* initialize special ring 16 */ |
| bcmgenet_init_tx_ring(priv, DESC_INDEX, GENET_DEFAULT_BD_CNT, |
| priv->hw_params->tx_queues * |
| priv->hw_params->bds_cnt, |
| TOTAL_DESC); |
| |
| return 0; |
| } |
| |
| /* NAPI polling method*/ |
| static int bcmgenet_poll(struct napi_struct *napi, int budget) |
| { |
| struct bcmgenet_priv *priv = container_of(napi, |
| struct bcmgenet_priv, napi); |
| unsigned int work_done; |
| |
| /* tx reclaim */ |
| bcmgenet_tx_reclaim(priv->dev, &priv->tx_rings[DESC_INDEX]); |
| |
| work_done = bcmgenet_desc_rx(priv, budget); |
| |
| /* Advancing our consumer index*/ |
| priv->rx_c_index += work_done; |
| priv->rx_c_index &= DMA_C_INDEX_MASK; |
| bcmgenet_rdma_ring_writel(priv, DESC_INDEX, |
| priv->rx_c_index, RDMA_CONS_INDEX); |
| if (work_done < budget) { |
| napi_complete(napi); |
| bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_BDONE, |
| INTRL2_CPU_MASK_CLEAR); |
| } |
| |
| return work_done; |
| } |
| |
| /* Interrupt bottom half */ |
| static void bcmgenet_irq_task(struct work_struct *work) |
| { |
| struct bcmgenet_priv *priv = container_of( |
| work, struct bcmgenet_priv, bcmgenet_irq_work); |
| |
| netif_dbg(priv, intr, priv->dev, "%s\n", __func__); |
| |
| if (priv->irq0_stat & UMAC_IRQ_MPD_R) { |
| priv->irq0_stat &= ~UMAC_IRQ_MPD_R; |
| netif_dbg(priv, wol, priv->dev, |
| "magic packet detected, waking up\n"); |
| bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC); |
| } |
| |
| /* Link UP/DOWN event */ |
| if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) && |
| (priv->irq0_stat & (UMAC_IRQ_LINK_UP|UMAC_IRQ_LINK_DOWN))) { |
| phy_mac_interrupt(priv->phydev, |
| priv->irq0_stat & UMAC_IRQ_LINK_UP); |
| priv->irq0_stat &= ~(UMAC_IRQ_LINK_UP|UMAC_IRQ_LINK_DOWN); |
| } |
| } |
| |
| /* bcmgenet_isr1: interrupt handler for ring buffer. */ |
| static irqreturn_t bcmgenet_isr1(int irq, void *dev_id) |
| { |
| struct bcmgenet_priv *priv = dev_id; |
| unsigned int index; |
| |
| /* Save irq status for bottom-half processing. */ |
| priv->irq1_stat = |
| bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_STAT) & |
| ~priv->int1_mask; |
| /* clear interrupts */ |
| bcmgenet_intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR); |
| |
| netif_dbg(priv, intr, priv->dev, |
| "%s: IRQ=0x%x\n", __func__, priv->irq1_stat); |
| /* Check the MBDONE interrupts. |
| * packet is done, reclaim descriptors |
| */ |
| if (priv->irq1_stat & 0x0000ffff) { |
| index = 0; |
| for (index = 0; index < 16; index++) { |
| if (priv->irq1_stat & (1 << index)) |
| bcmgenet_tx_reclaim(priv->dev, |
| &priv->tx_rings[index]); |
| } |
| } |
| return IRQ_HANDLED; |
| } |
| |
| /* bcmgenet_isr0: Handle various interrupts. */ |
| static irqreturn_t bcmgenet_isr0(int irq, void *dev_id) |
| { |
| struct bcmgenet_priv *priv = dev_id; |
| |
| /* Save irq status for bottom-half processing. */ |
| priv->irq0_stat = |
| bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT) & |
| ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS); |
| /* clear interrupts */ |
| bcmgenet_intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); |
| |
| netif_dbg(priv, intr, priv->dev, |
| "IRQ=0x%x\n", priv->irq0_stat); |
| |
| if (priv->irq0_stat & (UMAC_IRQ_RXDMA_BDONE | UMAC_IRQ_RXDMA_PDONE)) { |
| /* We use NAPI(software interrupt throttling, if |
| * Rx Descriptor throttling is not used. |
| * Disable interrupt, will be enabled in the poll method. |
| */ |
| if (likely(napi_schedule_prep(&priv->napi))) { |
| bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_BDONE, |
| INTRL2_CPU_MASK_SET); |
| __napi_schedule(&priv->napi); |
| } |
| } |
| if (priv->irq0_stat & |
| (UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE)) { |
| /* Tx reclaim */ |
| bcmgenet_tx_reclaim(priv->dev, &priv->tx_rings[DESC_INDEX]); |
| } |
| if (priv->irq0_stat & (UMAC_IRQ_PHY_DET_R | |
| UMAC_IRQ_PHY_DET_F | |
| UMAC_IRQ_LINK_UP | |
| UMAC_IRQ_LINK_DOWN | |
| UMAC_IRQ_HFB_SM | |
| UMAC_IRQ_HFB_MM | |
| UMAC_IRQ_MPD_R)) { |
| /* all other interested interrupts handled in bottom half */ |
| schedule_work(&priv->bcmgenet_irq_work); |
| } |
| |
| if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) && |
| priv->irq0_stat & (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR)) { |
| priv->irq0_stat &= ~(UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR); |
| wake_up(&priv->wq); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t bcmgenet_wol_isr(int irq, void *dev_id) |
| { |
| struct bcmgenet_priv *priv = dev_id; |
| |
| pm_wakeup_event(&priv->pdev->dev, 0); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void bcmgenet_umac_reset(struct bcmgenet_priv *priv) |
| { |
| u32 reg; |
| |
| reg = bcmgenet_rbuf_ctrl_get(priv); |
| reg |= BIT(1); |
| bcmgenet_rbuf_ctrl_set(priv, reg); |
| udelay(10); |
| |
| reg &= ~BIT(1); |
| bcmgenet_rbuf_ctrl_set(priv, reg); |
| udelay(10); |
| } |
| |
| static void bcmgenet_set_hw_addr(struct bcmgenet_priv *priv, |
| unsigned char *addr) |
| { |
| bcmgenet_umac_writel(priv, (addr[0] << 24) | (addr[1] << 16) | |
| (addr[2] << 8) | addr[3], UMAC_MAC0); |
| bcmgenet_umac_writel(priv, (addr[4] << 8) | addr[5], UMAC_MAC1); |
| } |
| |
| static int bcmgenet_wol_resume(struct bcmgenet_priv *priv) |
| { |
| /* From WOL-enabled suspend, switch to regular clock */ |
| clk_disable_unprepare(priv->clk_wol); |
| |
| phy_init_hw(priv->phydev); |
| /* Speed settings must be restored */ |
| bcmgenet_mii_config(priv->dev); |
| |
| return 0; |
| } |
| |
| /* Returns a reusable dma control register value */ |
| static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv) |
| { |
| u32 reg; |
| u32 dma_ctrl; |
| |
| /* disable DMA */ |
| dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN; |
| reg = bcmgenet_tdma_readl(priv, DMA_CTRL); |
| reg &= ~dma_ctrl; |
| bcmgenet_tdma_writel(priv, reg, DMA_CTRL); |
| |
| reg = bcmgenet_rdma_readl(priv, DMA_CTRL); |
| reg &= ~dma_ctrl; |
| bcmgenet_rdma_writel(priv, reg, DMA_CTRL); |
| |
| bcmgenet_umac_writel(priv, 1, UMAC_TX_FLUSH); |
| udelay(10); |
| bcmgenet_umac_writel(priv, 0, UMAC_TX_FLUSH); |
| |
| return dma_ctrl; |
| } |
| |
| static void bcmgenet_enable_dma(struct bcmgenet_priv *priv, u32 dma_ctrl) |
| { |
| u32 reg; |
| |
| reg = bcmgenet_rdma_readl(priv, DMA_CTRL); |
| reg |= dma_ctrl; |
| bcmgenet_rdma_writel(priv, reg, DMA_CTRL); |
| |
| reg = bcmgenet_tdma_readl(priv, DMA_CTRL); |
| reg |= dma_ctrl; |
| bcmgenet_tdma_writel(priv, reg, DMA_CTRL); |
| } |
| |
| static void bcmgenet_netif_start(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| |
| /* Start the network engine */ |
| napi_enable(&priv->napi); |
| |
| umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true); |
| |
| if (phy_is_internal(priv->phydev)) |
| bcmgenet_power_up(priv, GENET_POWER_PASSIVE); |
| |
| netif_tx_start_all_queues(dev); |
| |
| phy_start(priv->phydev); |
| } |
| |
| static int bcmgenet_open(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| unsigned long dma_ctrl; |
| u32 reg; |
| int ret; |
| |
| netif_dbg(priv, ifup, dev, "bcmgenet_open\n"); |
| |
| /* Turn on the clock */ |
| if (!IS_ERR(priv->clk)) |
| clk_prepare_enable(priv->clk); |
| |
| /* take MAC out of reset */ |
| bcmgenet_umac_reset(priv); |
| |
| ret = init_umac(priv); |
| if (ret) |
| goto err_clk_disable; |
| |
| /* disable ethernet MAC while updating its registers */ |
| umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, false); |
| |
| /* Make sure we reflect the value of CRC_CMD_FWD */ |
| reg = bcmgenet_umac_readl(priv, UMAC_CMD); |
| priv->crc_fwd_en = !!(reg & CMD_CRC_FWD); |
| |
| bcmgenet_set_hw_addr(priv, dev->dev_addr); |
| |
| if (phy_is_internal(priv->phydev)) { |
| reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT); |
| reg |= EXT_ENERGY_DET_MASK; |
| bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT); |
| } |
| |
| /* Disable RX/TX DMA and flush TX queues */ |
| dma_ctrl = bcmgenet_dma_disable(priv); |
| |
| /* Reinitialize TDMA and RDMA and SW housekeeping */ |
| ret = bcmgenet_init_dma(priv); |
| if (ret) { |
| netdev_err(dev, "failed to initialize DMA\n"); |
| goto err_fini_dma; |
| } |
| |
| /* Always enable ring 16 - descriptor ring */ |
| bcmgenet_enable_dma(priv, dma_ctrl); |
| |
| ret = request_irq(priv->irq0, bcmgenet_isr0, IRQF_SHARED, |
| dev->name, priv); |
| if (ret < 0) { |
| netdev_err(dev, "can't request IRQ %d\n", priv->irq0); |
| goto err_fini_dma; |
| } |
| |
| ret = request_irq(priv->irq1, bcmgenet_isr1, IRQF_SHARED, |
| dev->name, priv); |
| if (ret < 0) { |
| netdev_err(dev, "can't request IRQ %d\n", priv->irq1); |
| goto err_irq0; |
| } |
| |
| bcmgenet_netif_start(dev); |
| |
| return 0; |
| |
| err_irq0: |
| free_irq(priv->irq0, dev); |
| err_fini_dma: |
| bcmgenet_fini_dma(priv); |
| err_clk_disable: |
| if (!IS_ERR(priv->clk)) |
| clk_disable_unprepare(priv->clk); |
| return ret; |
| } |
| |
| static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv) |
| { |
| int ret = 0; |
| int timeout = 0; |
| u32 reg; |
| |
| /* Disable TDMA to stop add more frames in TX DMA */ |
| reg = bcmgenet_tdma_readl(priv, DMA_CTRL); |
| reg &= ~DMA_EN; |
| bcmgenet_tdma_writel(priv, reg, DMA_CTRL); |
| |
| /* Check TDMA status register to confirm TDMA is disabled */ |
| while (timeout++ < DMA_TIMEOUT_VAL) { |
| reg = bcmgenet_tdma_readl(priv, DMA_STATUS); |
| if (reg & DMA_DISABLED) |
| break; |
| |
| udelay(1); |
| } |
| |
| if (timeout == DMA_TIMEOUT_VAL) { |
| netdev_warn(priv->dev, "Timed out while disabling TX DMA\n"); |
| ret = -ETIMEDOUT; |
| } |
| |
| /* Wait 10ms for packet drain in both tx and rx dma */ |
| usleep_range(10000, 20000); |
| |
| /* Disable RDMA */ |
| reg = bcmgenet_rdma_readl(priv, DMA_CTRL); |
| reg &= ~DMA_EN; |
| bcmgenet_rdma_writel(priv, reg, DMA_CTRL); |
| |
| timeout = 0; |
| /* Check RDMA status register to confirm RDMA is disabled */ |
| while (timeout++ < DMA_TIMEOUT_VAL) { |
| reg = bcmgenet_rdma_readl(priv, DMA_STATUS); |
| if (reg & DMA_DISABLED) |
| break; |
| |
| udelay(1); |
| } |
| |
| if (timeout == DMA_TIMEOUT_VAL) { |
| netdev_warn(priv->dev, "Timed out while disabling RX DMA\n"); |
| ret = -ETIMEDOUT; |
| } |
| |
| return ret; |
| } |
| |
| static void bcmgenet_netif_stop(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| |
| netif_tx_stop_all_queues(dev); |
| napi_disable(&priv->napi); |
| phy_stop(priv->phydev); |
| |
| bcmgenet_intr_disable(priv); |
| |
| /* Wait for pending work items to complete. Since interrupts are |
| * disabled no new work will be scheduled. |
| */ |
| cancel_work_sync(&priv->bcmgenet_irq_work); |
| } |
| |
| static int bcmgenet_close(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| int ret; |
| |
| netif_dbg(priv, ifdown, dev, "bcmgenet_close\n"); |
| |
| bcmgenet_netif_stop(dev); |
| |
| /* Disable MAC receive */ |
| umac_enable_set(priv, CMD_RX_EN, false); |
| |
| ret = bcmgenet_dma_teardown(priv); |
| if (ret) |
| return ret; |
| |
| /* Disable MAC transmit. TX DMA disabled have to done before this */ |
| umac_enable_set(priv, CMD_TX_EN, false); |
| |
| /* tx reclaim */ |
| bcmgenet_tx_reclaim_all(dev); |
| bcmgenet_fini_dma(priv); |
| |
| free_irq(priv->irq0, priv); |
| free_irq(priv->irq1, priv); |
| |
| if (phy_is_internal(priv->phydev)) |
| bcmgenet_power_down(priv, GENET_POWER_PASSIVE); |
| |
| if (!IS_ERR(priv->clk)) |
| clk_disable_unprepare(priv->clk); |
| |
| return 0; |
| } |
| |
| static void bcmgenet_timeout(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| |
| netif_dbg(priv, tx_err, dev, "bcmgenet_timeout\n"); |
| |
| dev->trans_start = jiffies; |
| |
| dev->stats.tx_errors++; |
| |
| netif_tx_wake_all_queues(dev); |
| } |
| |
| #define MAX_MC_COUNT 16 |
| |
| static inline void bcmgenet_set_mdf_addr(struct bcmgenet_priv *priv, |
| unsigned char *addr, |
| int *i, |
| int *mc) |
| { |
| u32 reg; |
| |
| bcmgenet_umac_writel(priv, addr[0] << 8 | addr[1], |
| UMAC_MDF_ADDR + (*i * 4)); |
| bcmgenet_umac_writel(priv, addr[2] << 24 | addr[3] << 16 | |
| addr[4] << 8 | addr[5], |
| UMAC_MDF_ADDR + ((*i + 1) * 4)); |
| reg = bcmgenet_umac_readl(priv, UMAC_MDF_CTRL); |
| reg |= (1 << (MAX_MC_COUNT - *mc)); |
| bcmgenet_umac_writel(priv, reg, UMAC_MDF_CTRL); |
| *i += 2; |
| (*mc)++; |
| } |
| |
| static void bcmgenet_set_rx_mode(struct net_device *dev) |
| { |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| struct netdev_hw_addr *ha; |
| int i, mc; |
| u32 reg; |
| |
| netif_dbg(priv, hw, dev, "%s: %08X\n", __func__, dev->flags); |
| |
| /* Promiscuous mode */ |
| reg = bcmgenet_umac_readl(priv, UMAC_CMD); |
| if (dev->flags & IFF_PROMISC) { |
| reg |= CMD_PROMISC; |
| bcmgenet_umac_writel(priv, reg, UMAC_CMD); |
| bcmgenet_umac_writel(priv, 0, UMAC_MDF_CTRL); |
| return; |
| } else { |
| reg &= ~CMD_PROMISC; |
| bcmgenet_umac_writel(priv, reg, UMAC_CMD); |
| } |
| |
| /* UniMac doesn't support ALLMULTI */ |
| if (dev->flags & IFF_ALLMULTI) { |
| netdev_warn(dev, "ALLMULTI is not supported\n"); |
| return; |
| } |
| |
| /* update MDF filter */ |
| i = 0; |
| mc = 0; |
| /* Broadcast */ |
| bcmgenet_set_mdf_addr(priv, dev->broadcast, &i, &mc); |
| /* my own address.*/ |
| bcmgenet_set_mdf_addr(priv, dev->dev_addr, &i, &mc); |
| /* Unicast list*/ |
| if (netdev_uc_count(dev) > (MAX_MC_COUNT - mc)) |
| return; |
| |
| if (!netdev_uc_empty(dev)) |
| netdev_for_each_uc_addr(ha, dev) |
| bcmgenet_set_mdf_addr(priv, ha->addr, &i, &mc); |
| /* Multicast */ |
| if (netdev_mc_empty(dev) || netdev_mc_count(dev) >= (MAX_MC_COUNT - mc)) |
| return; |
| |
| netdev_for_each_mc_addr(ha, dev) |
| bcmgenet_set_mdf_addr(priv, ha->addr, &i, &mc); |
| } |
| |
| /* Set the hardware MAC address. */ |
| static int bcmgenet_set_mac_addr(struct net_device *dev, void *p) |
| { |
| struct sockaddr *addr = p; |
| |
| /* Setting the MAC address at the hardware level is not possible |
| * without disabling the UniMAC RX/TX enable bits. |
| */ |
| if (netif_running(dev)) |
| return -EBUSY; |
| |
| ether_addr_copy(dev->dev_addr, addr->sa_data); |
| |
| return 0; |
| } |
| |
| static const struct net_device_ops bcmgenet_netdev_ops = { |
| .ndo_open = bcmgenet_open, |
| .ndo_stop = bcmgenet_close, |
| .ndo_start_xmit = bcmgenet_xmit, |
| .ndo_tx_timeout = bcmgenet_timeout, |
| .ndo_set_rx_mode = bcmgenet_set_rx_mode, |
| .ndo_set_mac_address = bcmgenet_set_mac_addr, |
| .ndo_do_ioctl = bcmgenet_ioctl, |
| .ndo_set_features = bcmgenet_set_features, |
| }; |
| |
| /* Array of GENET hardware parameters/characteristics */ |
| static struct bcmgenet_hw_params bcmgenet_hw_params[] = { |
| [GENET_V1] = { |
| .tx_queues = 0, |
| .rx_queues = 0, |
| .bds_cnt = 0, |
| .bp_in_en_shift = 16, |
| .bp_in_mask = 0xffff, |
| .hfb_filter_cnt = 16, |
| .qtag_mask = 0x1F, |
| .hfb_offset = 0x1000, |
| .rdma_offset = 0x2000, |
| .tdma_offset = 0x3000, |
| .words_per_bd = 2, |
| }, |
| [GENET_V2] = { |
| .tx_queues = 4, |
| .rx_queues = 4, |
| .bds_cnt = 32, |
| .bp_in_en_shift = 16, |
| .bp_in_mask = 0xffff, |
| .hfb_filter_cnt = 16, |
| .qtag_mask = 0x1F, |
| .tbuf_offset = 0x0600, |
| .hfb_offset = 0x1000, |
| .hfb_reg_offset = 0x2000, |
| .rdma_offset = 0x3000, |
| .tdma_offset = 0x4000, |
| .words_per_bd = 2, |
| .flags = GENET_HAS_EXT, |
| }, |
| [GENET_V3] = { |
| .tx_queues = 4, |
| .rx_queues = 4, |
| .bds_cnt = 32, |
| .bp_in_en_shift = 17, |
| .bp_in_mask = 0x1ffff, |
| .hfb_filter_cnt = 48, |
| .qtag_mask = 0x3F, |
| .tbuf_offset = 0x0600, |
| .hfb_offset = 0x8000, |
| .hfb_reg_offset = 0xfc00, |
| .rdma_offset = 0x10000, |
| .tdma_offset = 0x11000, |
| .words_per_bd = 2, |
| .flags = GENET_HAS_EXT | GENET_HAS_MDIO_INTR, |
| }, |
| [GENET_V4] = { |
| .tx_queues = 4, |
| .rx_queues = 4, |
| .bds_cnt = 32, |
| .bp_in_en_shift = 17, |
| .bp_in_mask = 0x1ffff, |
| .hfb_filter_cnt = 48, |
| .qtag_mask = 0x3F, |
| .tbuf_offset = 0x0600, |
| .hfb_offset = 0x8000, |
| .hfb_reg_offset = 0xfc00, |
| .rdma_offset = 0x2000, |
| .tdma_offset = 0x4000, |
| .words_per_bd = 3, |
| .flags = GENET_HAS_40BITS | GENET_HAS_EXT | GENET_HAS_MDIO_INTR, |
| }, |
| }; |
| |
| /* Infer hardware parameters from the detected GENET version */ |
| static void bcmgenet_set_hw_params(struct bcmgenet_priv *priv) |
| { |
| struct bcmgenet_hw_params *params; |
| u32 reg; |
| u8 major; |
| |
| if (GENET_IS_V4(priv)) { |
| bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus; |
| genet_dma_ring_regs = genet_dma_ring_regs_v4; |
| priv->dma_rx_chk_bit = DMA_RX_CHK_V3PLUS; |
| priv->version = GENET_V4; |
| } else if (GENET_IS_V3(priv)) { |
| bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus; |
| genet_dma_ring_regs = genet_dma_ring_regs_v123; |
| priv->dma_rx_chk_bit = DMA_RX_CHK_V3PLUS; |
| priv->version = GENET_V3; |
| } else if (GENET_IS_V2(priv)) { |
| bcmgenet_dma_regs = bcmgenet_dma_regs_v2; |
| genet_dma_ring_regs = genet_dma_ring_regs_v123; |
| priv->dma_rx_chk_bit = DMA_RX_CHK_V12; |
| priv->version = GENET_V2; |
| } else if (GENET_IS_V1(priv)) { |
| bcmgenet_dma_regs = bcmgenet_dma_regs_v1; |
| genet_dma_ring_regs = genet_dma_ring_regs_v123; |
| priv->dma_rx_chk_bit = DMA_RX_CHK_V12; |
| priv->version = GENET_V1; |
| } |
| |
| /* enum genet_version starts at 1 */ |
| priv->hw_params = &bcmgenet_hw_params[priv->version]; |
| params = priv->hw_params; |
| |
| /* Read GENET HW version */ |
| reg = bcmgenet_sys_readl(priv, SYS_REV_CTRL); |
| major = (reg >> 24 & 0x0f); |
| if (major == 5) |
| major = 4; |
| else if (major == 0) |
| major = 1; |
| if (major != priv->version) { |
| dev_err(&priv->pdev->dev, |
| "GENET version mismatch, got: %d, configured for: %d\n", |
| major, priv->version); |
| } |
| |
| /* Print the GENET core version */ |
| dev_info(&priv->pdev->dev, "GENET " GENET_VER_FMT, |
| major, (reg >> 16) & 0x0f, reg & 0xffff); |
| |
| #ifdef CONFIG_PHYS_ADDR_T_64BIT |
| if (!(params->flags & GENET_HAS_40BITS)) |
| pr_warn("GENET does not support 40-bits PA\n"); |
| #endif |
| |
| pr_debug("Configuration for version: %d\n" |
| "TXq: %1d, RXq: %1d, BDs: %1d\n" |
| "BP << en: %2d, BP msk: 0x%05x\n" |
| "HFB count: %2d, QTAQ msk: 0x%05x\n" |
| "TBUF: 0x%04x, HFB: 0x%04x, HFBreg: 0x%04x\n" |
| "RDMA: 0x%05x, TDMA: 0x%05x\n" |
| "Words/BD: %d\n", |
| priv->version, |
| params->tx_queues, params->rx_queues, params->bds_cnt, |
| params->bp_in_en_shift, params->bp_in_mask, |
| params->hfb_filter_cnt, params->qtag_mask, |
| params->tbuf_offset, params->hfb_offset, |
| params->hfb_reg_offset, |
| params->rdma_offset, params->tdma_offset, |
| params->words_per_bd); |
| } |
| |
| static const struct of_device_id bcmgenet_match[] = { |
| { .compatible = "brcm,genet-v1", .data = (void *)GENET_V1 }, |
| { .compatible = "brcm,genet-v2", .data = (void *)GENET_V2 }, |
| { .compatible = "brcm,genet-v3", .data = (void *)GENET_V3 }, |
| { .compatible = "brcm,genet-v4", .data = (void *)GENET_V4 }, |
| { }, |
| }; |
| |
| static int bcmgenet_probe(struct platform_device *pdev) |
| { |
| struct device_node *dn = pdev->dev.of_node; |
| const struct of_device_id *of_id; |
| struct bcmgenet_priv *priv; |
| struct net_device *dev; |
| const void *macaddr; |
| struct resource *r; |
| int err = -EIO; |
| |
| /* Up to GENET_MAX_MQ_CNT + 1 TX queues and a single RX queue */ |
| dev = alloc_etherdev_mqs(sizeof(*priv), GENET_MAX_MQ_CNT + 1, 1); |
| if (!dev) { |
| dev_err(&pdev->dev, "can't allocate net device\n"); |
| return -ENOMEM; |
| } |
| |
| of_id = of_match_node(bcmgenet_match, dn); |
| if (!of_id) |
| return -EINVAL; |
| |
| 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 || !priv->irq1) { |
| dev_err(&pdev->dev, "can't find IRQs\n"); |
| err = -EINVAL; |
| goto err; |
| } |
| |
| macaddr = of_get_mac_address(dn); |
| if (!macaddr) { |
| dev_err(&pdev->dev, "can't find MAC address\n"); |
| err = -EINVAL; |
| goto err; |
| } |
| |
| r = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| priv->base = devm_ioremap_resource(&pdev->dev, r); |
| if (IS_ERR(priv->base)) { |
| err = PTR_ERR(priv->base); |
| goto err; |
| } |
| |
| SET_NETDEV_DEV(dev, &pdev->dev); |
| dev_set_drvdata(&pdev->dev, dev); |
| ether_addr_copy(dev->dev_addr, macaddr); |
| dev->watchdog_timeo = 2 * HZ; |
| dev->ethtool_ops = &bcmgenet_ethtool_ops; |
| dev->netdev_ops = &bcmgenet_netdev_ops; |
| netif_napi_add(dev, &priv->napi, bcmgenet_poll, 64); |
| |
| priv->msg_enable = netif_msg_init(-1, GENET_MSG_DEFAULT); |
| |
| /* Set hardware features */ |
| dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM | |
| NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM; |
| |
| /* Request the WOL interrupt and advertise suspend if available */ |
| priv->wol_irq_disabled = true; |
| err = devm_request_irq(&pdev->dev, priv->wol_irq, bcmgenet_wol_isr, 0, |
| dev->name, priv); |
| if (!err) |
| device_set_wakeup_capable(&pdev->dev, 1); |
| |
| /* Set the needed headroom to account for any possible |
| * features enabling/disabling at runtime |
| */ |
| dev->needed_headroom += 64; |
| |
| netdev_boot_setup_check(dev); |
| |
| priv->dev = dev; |
| priv->pdev = pdev; |
| priv->version = (enum bcmgenet_version)of_id->data; |
| |
| priv->clk = devm_clk_get(&priv->pdev->dev, "enet"); |
| if (IS_ERR(priv->clk)) |
| dev_warn(&priv->pdev->dev, "failed to get enet clock\n"); |
| |
| if (!IS_ERR(priv->clk)) |
| clk_prepare_enable(priv->clk); |
| |
| bcmgenet_set_hw_params(priv); |
| |
| /* Mii wait queue */ |
| init_waitqueue_head(&priv->wq); |
| /* Always use RX_BUF_LENGTH (2KB) buffer for all chips */ |
| priv->rx_buf_len = RX_BUF_LENGTH; |
| INIT_WORK(&priv->bcmgenet_irq_work, bcmgenet_irq_task); |
| |
| priv->clk_wol = devm_clk_get(&priv->pdev->dev, "enet-wol"); |
| if (IS_ERR(priv->clk_wol)) |
| dev_warn(&priv->pdev->dev, "failed to get enet-wol clock\n"); |
| |
| err = reset_umac(priv); |
| if (err) |
| goto err_clk_disable; |
| |
| err = bcmgenet_mii_init(dev); |
| if (err) |
| goto err_clk_disable; |
| |
| /* setup number of real queues + 1 (GENET_V1 has 0 hardware queues |
| * just the ring 16 descriptor based TX |
| */ |
| netif_set_real_num_tx_queues(priv->dev, priv->hw_params->tx_queues + 1); |
| netif_set_real_num_rx_queues(priv->dev, priv->hw_params->rx_queues + 1); |
| |
| /* libphy will determine the link state */ |
| netif_carrier_off(dev); |
| |
| /* Turn off the main clock, WOL clock is handled separately */ |
| if (!IS_ERR(priv->clk)) |
| clk_disable_unprepare(priv->clk); |
| |
| err = register_netdev(dev); |
| if (err) |
| goto err; |
| |
| return err; |
| |
| err_clk_disable: |
| if (!IS_ERR(priv->clk)) |
| clk_disable_unprepare(priv->clk); |
| err: |
| free_netdev(dev); |
| return err; |
| } |
| |
| static int bcmgenet_remove(struct platform_device *pdev) |
| { |
| struct bcmgenet_priv *priv = dev_to_priv(&pdev->dev); |
| |
| dev_set_drvdata(&pdev->dev, NULL); |
| unregister_netdev(priv->dev); |
| bcmgenet_mii_exit(priv->dev); |
| free_netdev(priv->dev); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int bcmgenet_suspend(struct device *d) |
| { |
| struct net_device *dev = dev_get_drvdata(d); |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| int ret; |
| |
| if (!netif_running(dev)) |
| return 0; |
| |
| bcmgenet_netif_stop(dev); |
| |
| netif_device_detach(dev); |
| |
| /* Disable MAC receive */ |
| umac_enable_set(priv, CMD_RX_EN, false); |
| |
| ret = bcmgenet_dma_teardown(priv); |
| if (ret) |
| return ret; |
| |
| /* Disable MAC transmit. TX DMA disabled have to done before this */ |
| umac_enable_set(priv, CMD_TX_EN, false); |
| |
| /* tx reclaim */ |
| bcmgenet_tx_reclaim_all(dev); |
| bcmgenet_fini_dma(priv); |
| |
| /* Prepare the device for Wake-on-LAN and switch to the slow clock */ |
| if (device_may_wakeup(d) && priv->wolopts) { |
| bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC); |
| clk_prepare_enable(priv->clk_wol); |
| } |
| |
| /* Turn off the clocks */ |
| clk_disable_unprepare(priv->clk); |
| |
| return 0; |
| } |
| |
| static int bcmgenet_resume(struct device *d) |
| { |
| struct net_device *dev = dev_get_drvdata(d); |
| struct bcmgenet_priv *priv = netdev_priv(dev); |
| unsigned long dma_ctrl; |
| int ret; |
| u32 reg; |
| |
| if (!netif_running(dev)) |
| return 0; |
| |
| /* Turn on the clock */ |
| ret = clk_prepare_enable(priv->clk); |
| if (ret) |
| return ret; |
| |
| bcmgenet_umac_reset(priv); |
| |
| ret = init_umac(priv); |
| if (ret) |
| goto out_clk_disable; |
| |
| if (priv->wolopts) |
| ret = bcmgenet_wol_resume(priv); |
| |
| if (ret) |
| goto out_clk_disable; |
| |
| /* disable ethernet MAC while updating its registers */ |
| umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, false); |
| |
| bcmgenet_set_hw_addr(priv, dev->dev_addr); |
| |
| if (phy_is_internal(priv->phydev)) { |
| reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT); |
| reg |= EXT_ENERGY_DET_MASK; |
| bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT); |
| } |
| |
| /* Disable RX/TX DMA and flush TX queues */ |
| dma_ctrl = bcmgenet_dma_disable(priv); |
| |
| /* Reinitialize TDMA and RDMA and SW housekeeping */ |
| ret = bcmgenet_init_dma(priv); |
| if (ret) { |
| netdev_err(dev, "failed to initialize DMA\n"); |
| goto out_clk_disable; |
| } |
| |
| /* Always enable ring 16 - descriptor ring */ |
| bcmgenet_enable_dma(priv, dma_ctrl); |
| |
| netif_device_attach(dev); |
| |
| bcmgenet_netif_start(dev); |
| |
| return 0; |
| |
| out_clk_disable: |
| clk_disable_unprepare(priv->clk); |
| return ret; |
| } |
| #endif /* CONFIG_PM_SLEEP */ |
| |
| static SIMPLE_DEV_PM_OPS(bcmgenet_pm_ops, bcmgenet_suspend, bcmgenet_resume); |
| |
| static struct platform_driver bcmgenet_driver = { |
| .probe = bcmgenet_probe, |
| .remove = bcmgenet_remove, |
| .driver = { |
| .name = "bcmgenet", |
| .owner = THIS_MODULE, |
| .of_match_table = bcmgenet_match, |
| .pm = &bcmgenet_pm_ops, |
| }, |
| }; |
| module_platform_driver(bcmgenet_driver); |
| |
| MODULE_AUTHOR("Broadcom Corporation"); |
| MODULE_DESCRIPTION("Broadcom GENET Ethernet controller driver"); |
| MODULE_ALIAS("platform:bcmgenet"); |
| MODULE_LICENSE("GPL"); |