3211 lines
84 KiB
C
3211 lines
84 KiB
C
/*
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* Broadcom GENET (Gigabit Ethernet) controller 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) "bcmgenet: " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/string.h>
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#include <linux/if_ether.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/pm.h>
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#include <linux/clk.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_net.h>
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#include <linux/of_platform.h>
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#include <net/arp.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/phy.h>
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#include <linux/platform_data/bcmgenet.h>
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#include <asm/unaligned.h>
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#include "bcmgenet.h"
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/* Maximum number of hardware queues, downsized if needed */
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#define GENET_MAX_MQ_CNT 4
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/* Default highest priority queue for multi queue support */
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#define GENET_Q0_PRIORITY 0
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#define GENET_Q16_RX_BD_CNT \
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(TOTAL_DESC - priv->hw_params->rx_queues * priv->hw_params->rx_bds_per_q)
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#define GENET_Q16_TX_BD_CNT \
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(TOTAL_DESC - priv->hw_params->tx_queues * priv->hw_params->tx_bds_per_q)
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#define RX_BUF_LENGTH 2048
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#define SKB_ALIGNMENT 32
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/* Tx/Rx DMA register offset, skip 256 descriptors */
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#define WORDS_PER_BD(p) (p->hw_params->words_per_bd)
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#define DMA_DESC_SIZE (WORDS_PER_BD(priv) * sizeof(u32))
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#define GENET_TDMA_REG_OFF (priv->hw_params->tdma_offset + \
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TOTAL_DESC * DMA_DESC_SIZE)
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#define GENET_RDMA_REG_OFF (priv->hw_params->rdma_offset + \
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TOTAL_DESC * DMA_DESC_SIZE)
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static inline void dmadesc_set_length_status(struct bcmgenet_priv *priv,
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void __iomem *d, u32 value)
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{
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__raw_writel(value, d + DMA_DESC_LENGTH_STATUS);
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}
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static inline u32 dmadesc_get_length_status(struct bcmgenet_priv *priv,
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void __iomem *d)
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{
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return __raw_readl(d + DMA_DESC_LENGTH_STATUS);
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}
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static inline void dmadesc_set_addr(struct bcmgenet_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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__raw_writel(lower_32_bits(addr), d + DMA_DESC_ADDRESS_LO);
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/* Register writes to GISB bus can take couple hundred nanoseconds
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* and are done for each packet, save these expensive writes unless
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* the platform is explicitly configured for 64-bits/LPAE.
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*/
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#ifdef CONFIG_PHYS_ADDR_T_64BIT
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if (priv->hw_params->flags & GENET_HAS_40BITS)
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__raw_writel(upper_32_bits(addr), d + DMA_DESC_ADDRESS_HI);
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#endif
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}
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/* Combined address + length/status setter */
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static inline void dmadesc_set(struct bcmgenet_priv *priv,
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void __iomem *d, dma_addr_t addr, u32 val)
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{
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dmadesc_set_length_status(priv, d, val);
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dmadesc_set_addr(priv, d, addr);
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}
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static inline dma_addr_t dmadesc_get_addr(struct bcmgenet_priv *priv,
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void __iomem *d)
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{
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dma_addr_t addr;
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addr = __raw_readl(d + DMA_DESC_ADDRESS_LO);
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/* Register writes to GISB bus can take couple hundred nanoseconds
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* and are done for each packet, save these expensive writes unless
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* the platform is explicitly configured for 64-bits/LPAE.
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*/
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#ifdef CONFIG_PHYS_ADDR_T_64BIT
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if (priv->hw_params->flags & GENET_HAS_40BITS)
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addr |= (u64)__raw_readl(d + DMA_DESC_ADDRESS_HI) << 32;
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#endif
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return addr;
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}
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#define GENET_VER_FMT "%1d.%1d EPHY: 0x%04x"
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#define GENET_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
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NETIF_MSG_LINK)
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static inline u32 bcmgenet_rbuf_ctrl_get(struct bcmgenet_priv *priv)
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{
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if (GENET_IS_V1(priv))
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return bcmgenet_rbuf_readl(priv, RBUF_FLUSH_CTRL_V1);
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else
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return bcmgenet_sys_readl(priv, SYS_RBUF_FLUSH_CTRL);
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}
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static inline void bcmgenet_rbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
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{
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if (GENET_IS_V1(priv))
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bcmgenet_rbuf_writel(priv, val, RBUF_FLUSH_CTRL_V1);
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else
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bcmgenet_sys_writel(priv, val, SYS_RBUF_FLUSH_CTRL);
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}
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/* These macros are defined to deal with register map change
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* between GENET1.1 and GENET2. Only those currently being used
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* by driver are defined.
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*/
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static inline u32 bcmgenet_tbuf_ctrl_get(struct bcmgenet_priv *priv)
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{
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if (GENET_IS_V1(priv))
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return bcmgenet_rbuf_readl(priv, TBUF_CTRL_V1);
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else
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return __raw_readl(priv->base +
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priv->hw_params->tbuf_offset + TBUF_CTRL);
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}
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static inline void bcmgenet_tbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
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{
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if (GENET_IS_V1(priv))
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bcmgenet_rbuf_writel(priv, val, TBUF_CTRL_V1);
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else
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__raw_writel(val, priv->base +
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priv->hw_params->tbuf_offset + TBUF_CTRL);
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}
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static inline u32 bcmgenet_bp_mc_get(struct bcmgenet_priv *priv)
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{
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if (GENET_IS_V1(priv))
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return bcmgenet_rbuf_readl(priv, TBUF_BP_MC_V1);
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else
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return __raw_readl(priv->base +
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priv->hw_params->tbuf_offset + TBUF_BP_MC);
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}
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static inline void bcmgenet_bp_mc_set(struct bcmgenet_priv *priv, u32 val)
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{
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if (GENET_IS_V1(priv))
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bcmgenet_rbuf_writel(priv, val, TBUF_BP_MC_V1);
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else
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__raw_writel(val, priv->base +
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priv->hw_params->tbuf_offset + TBUF_BP_MC);
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}
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/* RX/TX DMA register accessors */
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enum dma_reg {
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DMA_RING_CFG = 0,
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DMA_CTRL,
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DMA_STATUS,
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DMA_SCB_BURST_SIZE,
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DMA_ARB_CTRL,
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DMA_PRIORITY_0,
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DMA_PRIORITY_1,
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DMA_PRIORITY_2,
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DMA_INDEX2RING_0,
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DMA_INDEX2RING_1,
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DMA_INDEX2RING_2,
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DMA_INDEX2RING_3,
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DMA_INDEX2RING_4,
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DMA_INDEX2RING_5,
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DMA_INDEX2RING_6,
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DMA_INDEX2RING_7,
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};
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static const u8 bcmgenet_dma_regs_v3plus[] = {
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[DMA_RING_CFG] = 0x00,
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[DMA_CTRL] = 0x04,
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[DMA_STATUS] = 0x08,
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[DMA_SCB_BURST_SIZE] = 0x0C,
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[DMA_ARB_CTRL] = 0x2C,
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[DMA_PRIORITY_0] = 0x30,
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[DMA_PRIORITY_1] = 0x34,
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[DMA_PRIORITY_2] = 0x38,
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[DMA_INDEX2RING_0] = 0x70,
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[DMA_INDEX2RING_1] = 0x74,
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[DMA_INDEX2RING_2] = 0x78,
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[DMA_INDEX2RING_3] = 0x7C,
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[DMA_INDEX2RING_4] = 0x80,
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[DMA_INDEX2RING_5] = 0x84,
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[DMA_INDEX2RING_6] = 0x88,
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[DMA_INDEX2RING_7] = 0x8C,
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};
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static const u8 bcmgenet_dma_regs_v2[] = {
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[DMA_RING_CFG] = 0x00,
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[DMA_CTRL] = 0x04,
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[DMA_STATUS] = 0x08,
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[DMA_SCB_BURST_SIZE] = 0x0C,
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[DMA_ARB_CTRL] = 0x30,
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[DMA_PRIORITY_0] = 0x34,
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[DMA_PRIORITY_1] = 0x38,
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[DMA_PRIORITY_2] = 0x3C,
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};
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static const u8 bcmgenet_dma_regs_v1[] = {
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[DMA_CTRL] = 0x00,
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[DMA_STATUS] = 0x04,
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[DMA_SCB_BURST_SIZE] = 0x0C,
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[DMA_ARB_CTRL] = 0x30,
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[DMA_PRIORITY_0] = 0x34,
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[DMA_PRIORITY_1] = 0x38,
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[DMA_PRIORITY_2] = 0x3C,
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};
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/* Set at runtime once bcmgenet version is known */
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static const u8 *bcmgenet_dma_regs;
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static inline struct bcmgenet_priv *dev_to_priv(struct device *dev)
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{
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return netdev_priv(dev_get_drvdata(dev));
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}
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static inline u32 bcmgenet_tdma_readl(struct bcmgenet_priv *priv,
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enum dma_reg r)
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{
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return __raw_readl(priv->base + GENET_TDMA_REG_OFF +
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DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
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}
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static inline void bcmgenet_tdma_writel(struct bcmgenet_priv *priv,
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u32 val, enum dma_reg r)
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{
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__raw_writel(val, priv->base + GENET_TDMA_REG_OFF +
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DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
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}
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static inline u32 bcmgenet_rdma_readl(struct bcmgenet_priv *priv,
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enum dma_reg r)
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{
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return __raw_readl(priv->base + GENET_RDMA_REG_OFF +
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DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
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}
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static inline void bcmgenet_rdma_writel(struct bcmgenet_priv *priv,
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u32 val, enum dma_reg r)
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{
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__raw_writel(val, priv->base + GENET_RDMA_REG_OFF +
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DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
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}
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/* RDMA/TDMA ring registers and accessors
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* we merge the common fields and just prefix with T/D the registers
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* having different meaning depending on the direction
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*/
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enum dma_ring_reg {
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TDMA_READ_PTR = 0,
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RDMA_WRITE_PTR = TDMA_READ_PTR,
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TDMA_READ_PTR_HI,
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RDMA_WRITE_PTR_HI = TDMA_READ_PTR_HI,
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TDMA_CONS_INDEX,
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RDMA_PROD_INDEX = TDMA_CONS_INDEX,
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TDMA_PROD_INDEX,
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RDMA_CONS_INDEX = TDMA_PROD_INDEX,
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DMA_RING_BUF_SIZE,
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DMA_START_ADDR,
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DMA_START_ADDR_HI,
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DMA_END_ADDR,
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DMA_END_ADDR_HI,
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DMA_MBUF_DONE_THRESH,
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TDMA_FLOW_PERIOD,
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RDMA_XON_XOFF_THRESH = TDMA_FLOW_PERIOD,
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TDMA_WRITE_PTR,
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RDMA_READ_PTR = TDMA_WRITE_PTR,
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TDMA_WRITE_PTR_HI,
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RDMA_READ_PTR_HI = TDMA_WRITE_PTR_HI
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};
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/* GENET v4 supports 40-bits pointer addressing
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* for obvious reasons the LO and HI word parts
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* are contiguous, but this offsets the other
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* registers.
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*/
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static const u8 genet_dma_ring_regs_v4[] = {
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[TDMA_READ_PTR] = 0x00,
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[TDMA_READ_PTR_HI] = 0x04,
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[TDMA_CONS_INDEX] = 0x08,
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[TDMA_PROD_INDEX] = 0x0C,
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[DMA_RING_BUF_SIZE] = 0x10,
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[DMA_START_ADDR] = 0x14,
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[DMA_START_ADDR_HI] = 0x18,
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[DMA_END_ADDR] = 0x1C,
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[DMA_END_ADDR_HI] = 0x20,
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[DMA_MBUF_DONE_THRESH] = 0x24,
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[TDMA_FLOW_PERIOD] = 0x28,
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[TDMA_WRITE_PTR] = 0x2C,
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[TDMA_WRITE_PTR_HI] = 0x30,
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};
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static const u8 genet_dma_ring_regs_v123[] = {
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[TDMA_READ_PTR] = 0x00,
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[TDMA_CONS_INDEX] = 0x04,
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[TDMA_PROD_INDEX] = 0x08,
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[DMA_RING_BUF_SIZE] = 0x0C,
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[DMA_START_ADDR] = 0x10,
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[DMA_END_ADDR] = 0x14,
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[DMA_MBUF_DONE_THRESH] = 0x18,
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[TDMA_FLOW_PERIOD] = 0x1C,
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[TDMA_WRITE_PTR] = 0x20,
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};
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/* Set at runtime once GENET version is known */
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static const u8 *genet_dma_ring_regs;
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static inline u32 bcmgenet_tdma_ring_readl(struct bcmgenet_priv *priv,
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unsigned int ring,
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enum dma_ring_reg r)
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{
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return __raw_readl(priv->base + GENET_TDMA_REG_OFF +
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(DMA_RING_SIZE * ring) +
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genet_dma_ring_regs[r]);
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}
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static inline void bcmgenet_tdma_ring_writel(struct bcmgenet_priv *priv,
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unsigned int ring, u32 val,
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enum dma_ring_reg r)
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{
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__raw_writel(val, priv->base + GENET_TDMA_REG_OFF +
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(DMA_RING_SIZE * ring) +
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genet_dma_ring_regs[r]);
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}
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static inline u32 bcmgenet_rdma_ring_readl(struct bcmgenet_priv *priv,
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unsigned int ring,
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enum dma_ring_reg r)
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{
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return __raw_readl(priv->base + GENET_RDMA_REG_OFF +
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(DMA_RING_SIZE * ring) +
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genet_dma_ring_regs[r]);
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}
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static inline void bcmgenet_rdma_ring_writel(struct bcmgenet_priv *priv,
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unsigned int ring, u32 val,
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enum dma_ring_reg r)
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{
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__raw_writel(val, priv->base + GENET_RDMA_REG_OFF +
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(DMA_RING_SIZE * ring) +
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genet_dma_ring_regs[r]);
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}
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static int bcmgenet_get_settings(struct net_device *dev,
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struct ethtool_cmd *cmd)
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{
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struct bcmgenet_priv *priv = netdev_priv(dev);
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if (!netif_running(dev))
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return -EINVAL;
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if (!priv->phydev)
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return -ENODEV;
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return phy_ethtool_gset(priv->phydev, cmd);
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}
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static int bcmgenet_set_settings(struct net_device *dev,
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struct ethtool_cmd *cmd)
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{
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struct bcmgenet_priv *priv = netdev_priv(dev);
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if (!netif_running(dev))
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return -EINVAL;
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if (!priv->phydev)
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return -ENODEV;
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return phy_ethtool_sset(priv->phydev, cmd);
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}
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static int bcmgenet_set_rx_csum(struct net_device *dev,
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netdev_features_t wanted)
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{
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struct bcmgenet_priv *priv = netdev_priv(dev);
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u32 rbuf_chk_ctrl;
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bool rx_csum_en;
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rx_csum_en = !!(wanted & NETIF_F_RXCSUM);
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rbuf_chk_ctrl = bcmgenet_rbuf_readl(priv, RBUF_CHK_CTRL);
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/* enable rx checksumming */
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if (rx_csum_en)
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rbuf_chk_ctrl |= RBUF_RXCHK_EN;
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else
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rbuf_chk_ctrl &= ~RBUF_RXCHK_EN;
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priv->desc_rxchk_en = rx_csum_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 (rx_csum_en && priv->crc_fwd_en)
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rbuf_chk_ctrl |= RBUF_SKIP_FCS;
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else
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rbuf_chk_ctrl &= ~RBUF_SKIP_FCS;
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bcmgenet_rbuf_writel(priv, rbuf_chk_ctrl, RBUF_CHK_CTRL);
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return 0;
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}
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static int bcmgenet_set_tx_csum(struct net_device *dev,
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netdev_features_t wanted)
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{
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struct bcmgenet_priv *priv = netdev_priv(dev);
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bool desc_64b_en;
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u32 tbuf_ctrl, rbuf_ctrl;
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tbuf_ctrl = bcmgenet_tbuf_ctrl_get(priv);
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rbuf_ctrl = bcmgenet_rbuf_readl(priv, RBUF_CTRL);
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desc_64b_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
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/* enable 64 bytes descriptor in both directions (RBUF and TBUF) */
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if (desc_64b_en) {
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tbuf_ctrl |= RBUF_64B_EN;
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rbuf_ctrl |= RBUF_64B_EN;
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} else {
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tbuf_ctrl &= ~RBUF_64B_EN;
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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,
|
|
BCMGENET_STAT_SOFT,
|
|
};
|
|
|
|
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_SOFT_MIB(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_SOFT)
|
|
|
|
#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),
|
|
STAT_GENET_SOFT_MIB("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
|
|
STAT_GENET_SOFT_MIB("rx_dma_failed", mib.rx_dma_failed),
|
|
STAT_GENET_SOFT_MIB("tx_dma_failed", mib.tx_dma_failed),
|
|
};
|
|
|
|
#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:
|
|
case BCMGENET_STAT_SOFT:
|
|
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;
|
|
}
|
|
}
|
|
|
|
static void bcmgenet_eee_enable_set(struct net_device *dev, bool enable)
|
|
{
|
|
struct bcmgenet_priv *priv = netdev_priv(dev);
|
|
u32 off = priv->hw_params->tbuf_offset + TBUF_ENERGY_CTRL;
|
|
u32 reg;
|
|
|
|
if (enable && !priv->clk_eee_enabled) {
|
|
clk_prepare_enable(priv->clk_eee);
|
|
priv->clk_eee_enabled = true;
|
|
}
|
|
|
|
reg = bcmgenet_umac_readl(priv, UMAC_EEE_CTRL);
|
|
if (enable)
|
|
reg |= EEE_EN;
|
|
else
|
|
reg &= ~EEE_EN;
|
|
bcmgenet_umac_writel(priv, reg, UMAC_EEE_CTRL);
|
|
|
|
/* Enable EEE and switch to a 27Mhz clock automatically */
|
|
reg = __raw_readl(priv->base + off);
|
|
if (enable)
|
|
reg |= TBUF_EEE_EN | TBUF_PM_EN;
|
|
else
|
|
reg &= ~(TBUF_EEE_EN | TBUF_PM_EN);
|
|
__raw_writel(reg, priv->base + off);
|
|
|
|
/* Do the same for thing for RBUF */
|
|
reg = bcmgenet_rbuf_readl(priv, RBUF_ENERGY_CTRL);
|
|
if (enable)
|
|
reg |= RBUF_EEE_EN | RBUF_PM_EN;
|
|
else
|
|
reg &= ~(RBUF_EEE_EN | RBUF_PM_EN);
|
|
bcmgenet_rbuf_writel(priv, reg, RBUF_ENERGY_CTRL);
|
|
|
|
if (!enable && priv->clk_eee_enabled) {
|
|
clk_disable_unprepare(priv->clk_eee);
|
|
priv->clk_eee_enabled = false;
|
|
}
|
|
|
|
priv->eee.eee_enabled = enable;
|
|
priv->eee.eee_active = enable;
|
|
}
|
|
|
|
static int bcmgenet_get_eee(struct net_device *dev, struct ethtool_eee *e)
|
|
{
|
|
struct bcmgenet_priv *priv = netdev_priv(dev);
|
|
struct ethtool_eee *p = &priv->eee;
|
|
|
|
if (GENET_IS_V1(priv))
|
|
return -EOPNOTSUPP;
|
|
|
|
e->eee_enabled = p->eee_enabled;
|
|
e->eee_active = p->eee_active;
|
|
e->tx_lpi_timer = bcmgenet_umac_readl(priv, UMAC_EEE_LPI_TIMER);
|
|
|
|
return phy_ethtool_get_eee(priv->phydev, e);
|
|
}
|
|
|
|
static int bcmgenet_set_eee(struct net_device *dev, struct ethtool_eee *e)
|
|
{
|
|
struct bcmgenet_priv *priv = netdev_priv(dev);
|
|
struct ethtool_eee *p = &priv->eee;
|
|
int ret = 0;
|
|
|
|
if (GENET_IS_V1(priv))
|
|
return -EOPNOTSUPP;
|
|
|
|
p->eee_enabled = e->eee_enabled;
|
|
|
|
if (!p->eee_enabled) {
|
|
bcmgenet_eee_enable_set(dev, false);
|
|
} else {
|
|
ret = phy_init_eee(priv->phydev, 0);
|
|
if (ret) {
|
|
netif_err(priv, hw, dev, "EEE initialization failed\n");
|
|
return ret;
|
|
}
|
|
|
|
bcmgenet_umac_writel(priv, e->tx_lpi_timer, UMAC_EEE_LPI_TIMER);
|
|
bcmgenet_eee_enable_set(dev, true);
|
|
}
|
|
|
|
return phy_ethtool_set_eee(priv->phydev, e);
|
|
}
|
|
|
|
static int bcmgenet_nway_reset(struct net_device *dev)
|
|
{
|
|
struct bcmgenet_priv *priv = netdev_priv(dev);
|
|
|
|
return genphy_restart_aneg(priv->phydev);
|
|
}
|
|
|
|
/* 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,
|
|
.get_eee = bcmgenet_get_eee,
|
|
.set_eee = bcmgenet_set_eee,
|
|
.nway_reset = bcmgenet_nway_reset,
|
|
};
|
|
|
|
/* Power down the unimac, based on mode. */
|
|
static int bcmgenet_power_down(struct bcmgenet_priv *priv,
|
|
enum bcmgenet_power_mode mode)
|
|
{
|
|
int ret = 0;
|
|
u32 reg;
|
|
|
|
switch (mode) {
|
|
case GENET_POWER_CABLE_SENSE:
|
|
phy_detach(priv->phydev);
|
|
break;
|
|
|
|
case GENET_POWER_WOL_MAGIC:
|
|
ret = bcmgenet_wol_power_down_cfg(priv, mode);
|
|
break;
|
|
|
|
case GENET_POWER_PASSIVE:
|
|
/* Power down LED */
|
|
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);
|
|
|
|
bcmgenet_phy_power_set(priv->dev, false);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
|
|
if (mode == GENET_POWER_PASSIVE)
|
|
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;
|
|
|
|
/* 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_tx_ring *ring)
|
|
{
|
|
bcmgenet_intrl2_0_writel(ring->priv,
|
|
UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE,
|
|
INTRL2_CPU_MASK_SET);
|
|
}
|
|
|
|
static inline void bcmgenet_tx_ring16_int_enable(struct bcmgenet_tx_ring *ring)
|
|
{
|
|
bcmgenet_intrl2_0_writel(ring->priv,
|
|
UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE,
|
|
INTRL2_CPU_MASK_CLEAR);
|
|
}
|
|
|
|
static inline void bcmgenet_tx_ring_int_enable(struct bcmgenet_tx_ring *ring)
|
|
{
|
|
bcmgenet_intrl2_1_writel(ring->priv, 1 << ring->index,
|
|
INTRL2_CPU_MASK_CLEAR);
|
|
}
|
|
|
|
static inline void bcmgenet_tx_ring_int_disable(struct bcmgenet_tx_ring *ring)
|
|
{
|
|
bcmgenet_intrl2_1_writel(ring->priv, 1 << ring->index,
|
|
INTRL2_CPU_MASK_SET);
|
|
}
|
|
|
|
/* Unlocked version of the reclaim routine */
|
|
static unsigned int __bcmgenet_tx_reclaim(struct net_device *dev,
|
|
struct bcmgenet_tx_ring *ring)
|
|
{
|
|
struct bcmgenet_priv *priv = netdev_priv(dev);
|
|
struct enet_cb *tx_cb_ptr;
|
|
struct netdev_queue *txq;
|
|
unsigned int pkts_compl = 0;
|
|
unsigned int c_index;
|
|
unsigned int txbds_ready;
|
|
unsigned int txbds_processed = 0;
|
|
|
|
/* Compute how many buffers are transmitted since last xmit call */
|
|
c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX);
|
|
c_index &= DMA_C_INDEX_MASK;
|
|
|
|
if (likely(c_index >= ring->c_index))
|
|
txbds_ready = c_index - ring->c_index;
|
|
else
|
|
txbds_ready = (DMA_C_INDEX_MASK + 1) - ring->c_index + c_index;
|
|
|
|
netif_dbg(priv, tx_done, dev,
|
|
"%s ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
|
|
__func__, ring->index, ring->c_index, c_index, txbds_ready);
|
|
|
|
/* Reclaim transmitted buffers */
|
|
while (txbds_processed < txbds_ready) {
|
|
tx_cb_ptr = &priv->tx_cbs[ring->clean_ptr];
|
|
if (tx_cb_ptr->skb) {
|
|
pkts_compl++;
|
|
dev->stats.tx_packets++;
|
|
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);
|
|
}
|
|
|
|
txbds_processed++;
|
|
if (likely(ring->clean_ptr < ring->end_ptr))
|
|
ring->clean_ptr++;
|
|
else
|
|
ring->clean_ptr = ring->cb_ptr;
|
|
}
|
|
|
|
ring->free_bds += txbds_processed;
|
|
ring->c_index = (ring->c_index + txbds_processed) & DMA_C_INDEX_MASK;
|
|
|
|
if (ring->free_bds > (MAX_SKB_FRAGS + 1)) {
|
|
txq = netdev_get_tx_queue(dev, ring->queue);
|
|
if (netif_tx_queue_stopped(txq))
|
|
netif_tx_wake_queue(txq);
|
|
}
|
|
|
|
return pkts_compl;
|
|
}
|
|
|
|
static unsigned int bcmgenet_tx_reclaim(struct net_device *dev,
|
|
struct bcmgenet_tx_ring *ring)
|
|
{
|
|
unsigned int released;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ring->lock, flags);
|
|
released = __bcmgenet_tx_reclaim(dev, ring);
|
|
spin_unlock_irqrestore(&ring->lock, flags);
|
|
|
|
return released;
|
|
}
|
|
|
|
static int bcmgenet_tx_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct bcmgenet_tx_ring *ring =
|
|
container_of(napi, struct bcmgenet_tx_ring, napi);
|
|
unsigned int work_done = 0;
|
|
|
|
work_done = bcmgenet_tx_reclaim(ring->priv->dev, ring);
|
|
|
|
if (work_done == 0) {
|
|
napi_complete(napi);
|
|
ring->int_enable(ring);
|
|
|
|
return 0;
|
|
}
|
|
|
|
return budget;
|
|
}
|
|
|
|
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) {
|
|
priv->mib.tx_dma_failed++;
|
|
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);
|
|
|
|
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) {
|
|
priv->mib.tx_dma_failed++;
|
|
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));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Reallocate the SKB to put enough headroom in front of it and insert
|
|
* the transmit checksum offsets in the descriptors
|
|
*/
|
|
static struct sk_buff *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 NULL;
|
|
}
|
|
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 skb;
|
|
}
|
|
|
|
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 skb;
|
|
}
|
|
|
|
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) {
|
|
skb = bcmgenet_put_tx_csum(dev, skb);
|
|
if (!skb) {
|
|
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);
|
|
|
|
/* Decrement total BD count and advance our write pointer */
|
|
ring->free_bds -= nr_frags + 1;
|
|
ring->prod_index += nr_frags + 1;
|
|
ring->prod_index &= DMA_P_INDEX_MASK;
|
|
|
|
if (ring->free_bds <= (MAX_SKB_FRAGS + 1))
|
|
netif_tx_stop_queue(txq);
|
|
|
|
if (!skb->xmit_more || netif_xmit_stopped(txq))
|
|
/* Packets are ready, update producer index */
|
|
bcmgenet_tdma_ring_writel(priv, ring->index,
|
|
ring->prod_index, TDMA_PROD_INDEX);
|
|
out:
|
|
spin_unlock_irqrestore(&ring->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct sk_buff *bcmgenet_rx_refill(struct bcmgenet_priv *priv,
|
|
struct enet_cb *cb)
|
|
{
|
|
struct device *kdev = &priv->pdev->dev;
|
|
struct sk_buff *skb;
|
|
struct sk_buff *rx_skb;
|
|
dma_addr_t mapping;
|
|
|
|
/* Allocate a new Rx skb */
|
|
skb = netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT);
|
|
if (!skb) {
|
|
priv->mib.alloc_rx_buff_failed++;
|
|
netif_err(priv, rx_err, priv->dev,
|
|
"%s: Rx skb allocation failed\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
/* DMA-map the new Rx skb */
|
|
mapping = dma_map_single(kdev, skb->data, priv->rx_buf_len,
|
|
DMA_FROM_DEVICE);
|
|
if (dma_mapping_error(kdev, mapping)) {
|
|
priv->mib.rx_dma_failed++;
|
|
dev_kfree_skb_any(skb);
|
|
netif_err(priv, rx_err, priv->dev,
|
|
"%s: Rx skb DMA mapping failed\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
/* Grab the current Rx skb from the ring and DMA-unmap it */
|
|
rx_skb = cb->skb;
|
|
if (likely(rx_skb))
|
|
dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
|
|
priv->rx_buf_len, DMA_FROM_DEVICE);
|
|
|
|
/* Put the new Rx skb on the ring */
|
|
cb->skb = skb;
|
|
dma_unmap_addr_set(cb, dma_addr, mapping);
|
|
dmadesc_set_addr(priv, cb->bd_addr, mapping);
|
|
|
|
/* Return the current Rx skb to caller */
|
|
return rx_skb;
|
|
}
|
|
|
|
/* 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 index,
|
|
unsigned int budget)
|
|
{
|
|
struct bcmgenet_rx_ring *ring = &priv->rx_rings[index];
|
|
struct net_device *dev = priv->dev;
|
|
struct enet_cb *cb;
|
|
struct sk_buff *skb;
|
|
u32 dma_length_status;
|
|
unsigned long dma_flag;
|
|
int len;
|
|
unsigned int rxpktprocessed = 0, rxpkttoprocess;
|
|
unsigned int p_index;
|
|
unsigned int discards;
|
|
unsigned int chksum_ok = 0;
|
|
|
|
p_index = bcmgenet_rdma_ring_readl(priv, index, RDMA_PROD_INDEX);
|
|
|
|
discards = (p_index >> DMA_P_INDEX_DISCARD_CNT_SHIFT) &
|
|
DMA_P_INDEX_DISCARD_CNT_MASK;
|
|
if (discards > ring->old_discards) {
|
|
discards = discards - ring->old_discards;
|
|
dev->stats.rx_missed_errors += discards;
|
|
dev->stats.rx_errors += discards;
|
|
ring->old_discards += discards;
|
|
|
|
/* Clear HW register when we reach 75% of maximum 0xFFFF */
|
|
if (ring->old_discards >= 0xC000) {
|
|
ring->old_discards = 0;
|
|
bcmgenet_rdma_ring_writel(priv, index, 0,
|
|
RDMA_PROD_INDEX);
|
|
}
|
|
}
|
|
|
|
p_index &= DMA_P_INDEX_MASK;
|
|
|
|
if (likely(p_index >= ring->c_index))
|
|
rxpkttoprocess = p_index - ring->c_index;
|
|
else
|
|
rxpkttoprocess = (DMA_C_INDEX_MASK + 1) - ring->c_index +
|
|
p_index;
|
|
|
|
netif_dbg(priv, rx_status, dev,
|
|
"RDMA: rxpkttoprocess=%d\n", rxpkttoprocess);
|
|
|
|
while ((rxpktprocessed < rxpkttoprocess) &&
|
|
(rxpktprocessed < budget)) {
|
|
cb = &priv->rx_cbs[ring->read_ptr];
|
|
skb = bcmgenet_rx_refill(priv, cb);
|
|
|
|
if (unlikely(!skb)) {
|
|
dev->stats.rx_dropped++;
|
|
dev->stats.rx_errors++;
|
|
goto next;
|
|
}
|
|
|
|
if (!priv->desc_64b_en) {
|
|
dma_length_status =
|
|
dmadesc_get_length_status(priv, cb->bd_addr);
|
|
} 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, ring->c_index,
|
|
ring->read_ptr, dma_length_status);
|
|
|
|
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(skb);
|
|
goto next;
|
|
}
|
|
|
|
/* 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++;
|
|
dev_kfree_skb_any(skb);
|
|
goto next;
|
|
} /* 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);
|
|
netif_dbg(priv, rx_status, dev, "pushed up to kernel\n");
|
|
|
|
next:
|
|
rxpktprocessed++;
|
|
if (likely(ring->read_ptr < ring->end_ptr))
|
|
ring->read_ptr++;
|
|
else
|
|
ring->read_ptr = ring->cb_ptr;
|
|
|
|
ring->c_index = (ring->c_index + 1) & DMA_C_INDEX_MASK;
|
|
bcmgenet_rdma_ring_writel(priv, index, ring->c_index, RDMA_CONS_INDEX);
|
|
}
|
|
|
|
return rxpktprocessed;
|
|
}
|
|
|
|
/* Assign skb to RX DMA descriptor. */
|
|
static int bcmgenet_alloc_rx_buffers(struct bcmgenet_priv *priv,
|
|
struct bcmgenet_rx_ring *ring)
|
|
{
|
|
struct enet_cb *cb;
|
|
struct sk_buff *skb;
|
|
int i;
|
|
|
|
netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
|
|
|
|
/* loop here for each buffer needing assign */
|
|
for (i = 0; i < ring->size; i++) {
|
|
cb = ring->cbs + i;
|
|
skb = bcmgenet_rx_refill(priv, cb);
|
|
if (skb)
|
|
dev_kfree_skb_any(skb);
|
|
if (!cb->skb)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
int index;
|
|
|
|
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 | UMAC_IRQ_TXDMA_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);
|
|
|
|
for (index = 0; index < priv->hw_params->tx_queues; index++)
|
|
bcmgenet_intrl2_1_writel(priv, (1 << index),
|
|
INTRL2_CPU_MASK_CLEAR);
|
|
|
|
/* Enable rx/tx engine.*/
|
|
dev_dbg(kdev, "done init umac\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Initialize 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 start_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;
|
|
|
|
spin_lock_init(&ring->lock);
|
|
ring->priv = priv;
|
|
netif_napi_add(priv->dev, &ring->napi, bcmgenet_tx_poll, 64);
|
|
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 + start_ptr;
|
|
ring->size = size;
|
|
ring->clean_ptr = start_ptr;
|
|
ring->c_index = 0;
|
|
ring->free_bds = size;
|
|
ring->write_ptr = start_ptr;
|
|
ring->cb_ptr = start_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);
|
|
bcmgenet_tdma_ring_writel(priv, index,
|
|
((size << DMA_RING_SIZE_SHIFT) |
|
|
RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
|
|
|
|
/* Set start and end address, read and write pointers */
|
|
bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
|
|
DMA_START_ADDR);
|
|
bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
|
|
TDMA_READ_PTR);
|
|
bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
|
|
TDMA_WRITE_PTR);
|
|
bcmgenet_tdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
|
|
DMA_END_ADDR);
|
|
|
|
napi_enable(&ring->napi);
|
|
}
|
|
|
|
static void bcmgenet_fini_tx_ring(struct bcmgenet_priv *priv,
|
|
unsigned int index)
|
|
{
|
|
struct bcmgenet_tx_ring *ring = &priv->tx_rings[index];
|
|
|
|
napi_disable(&ring->napi);
|
|
netif_napi_del(&ring->napi);
|
|
}
|
|
|
|
/* Initialize a RDMA ring */
|
|
static int bcmgenet_init_rx_ring(struct bcmgenet_priv *priv,
|
|
unsigned int index, unsigned int size,
|
|
unsigned int start_ptr, unsigned int end_ptr)
|
|
{
|
|
struct bcmgenet_rx_ring *ring = &priv->rx_rings[index];
|
|
u32 words_per_bd = WORDS_PER_BD(priv);
|
|
int ret;
|
|
|
|
ring->index = index;
|
|
ring->cbs = priv->rx_cbs + start_ptr;
|
|
ring->size = size;
|
|
ring->c_index = 0;
|
|
ring->read_ptr = start_ptr;
|
|
ring->cb_ptr = start_ptr;
|
|
ring->end_ptr = end_ptr - 1;
|
|
|
|
ret = bcmgenet_alloc_rx_buffers(priv, ring);
|
|
if (ret)
|
|
return ret;
|
|
|
|
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, 1, DMA_MBUF_DONE_THRESH);
|
|
bcmgenet_rdma_ring_writel(priv, index,
|
|
((size << DMA_RING_SIZE_SHIFT) |
|
|
RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
|
|
bcmgenet_rdma_ring_writel(priv, index,
|
|
(DMA_FC_THRESH_LO <<
|
|
DMA_XOFF_THRESHOLD_SHIFT) |
|
|
DMA_FC_THRESH_HI, RDMA_XON_XOFF_THRESH);
|
|
|
|
/* Set start and end address, read and write pointers */
|
|
bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
|
|
DMA_START_ADDR);
|
|
bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
|
|
RDMA_READ_PTR);
|
|
bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
|
|
RDMA_WRITE_PTR);
|
|
bcmgenet_rdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
|
|
DMA_END_ADDR);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Initialize Tx queues
|
|
*
|
|
* Queues 0-3 are priority-based, each one has 32 descriptors,
|
|
* with queue 0 being the highest priority queue.
|
|
*
|
|
* Queue 16 is the default Tx queue with
|
|
* GENET_Q16_TX_BD_CNT = 256 - 4 * 32 = 128 descriptors.
|
|
*
|
|
* The transmit control block pool is then partitioned as follows:
|
|
* - Tx queue 0 uses tx_cbs[0..31]
|
|
* - Tx queue 1 uses tx_cbs[32..63]
|
|
* - Tx queue 2 uses tx_cbs[64..95]
|
|
* - Tx queue 3 uses tx_cbs[96..127]
|
|
* - Tx queue 16 uses tx_cbs[128..255]
|
|
*/
|
|
static void bcmgenet_init_tx_queues(struct net_device *dev)
|
|
{
|
|
struct bcmgenet_priv *priv = netdev_priv(dev);
|
|
u32 i, dma_enable;
|
|
u32 dma_ctrl, ring_cfg;
|
|
u32 dma_priority[3] = {0, 0, 0};
|
|
|
|
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);
|
|
|
|
dma_ctrl = 0;
|
|
ring_cfg = 0;
|
|
|
|
/* Enable strict priority arbiter mode */
|
|
bcmgenet_tdma_writel(priv, DMA_ARBITER_SP, DMA_ARB_CTRL);
|
|
|
|
/* Initialize Tx priority queues */
|
|
for (i = 0; i < priv->hw_params->tx_queues; i++) {
|
|
bcmgenet_init_tx_ring(priv, i, priv->hw_params->tx_bds_per_q,
|
|
i * priv->hw_params->tx_bds_per_q,
|
|
(i + 1) * priv->hw_params->tx_bds_per_q);
|
|
ring_cfg |= (1 << i);
|
|
dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
|
|
dma_priority[DMA_PRIO_REG_INDEX(i)] |=
|
|
((GENET_Q0_PRIORITY + i) << DMA_PRIO_REG_SHIFT(i));
|
|
}
|
|
|
|
/* Initialize Tx default queue 16 */
|
|
bcmgenet_init_tx_ring(priv, DESC_INDEX, GENET_Q16_TX_BD_CNT,
|
|
priv->hw_params->tx_queues *
|
|
priv->hw_params->tx_bds_per_q,
|
|
TOTAL_DESC);
|
|
ring_cfg |= (1 << DESC_INDEX);
|
|
dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
|
|
dma_priority[DMA_PRIO_REG_INDEX(DESC_INDEX)] |=
|
|
((GENET_Q0_PRIORITY + priv->hw_params->tx_queues) <<
|
|
DMA_PRIO_REG_SHIFT(DESC_INDEX));
|
|
|
|
/* Set Tx queue priorities */
|
|
bcmgenet_tdma_writel(priv, dma_priority[0], DMA_PRIORITY_0);
|
|
bcmgenet_tdma_writel(priv, dma_priority[1], DMA_PRIORITY_1);
|
|
bcmgenet_tdma_writel(priv, dma_priority[2], DMA_PRIORITY_2);
|
|
|
|
/* Enable Tx queues */
|
|
bcmgenet_tdma_writel(priv, ring_cfg, DMA_RING_CFG);
|
|
|
|
/* Enable Tx DMA */
|
|
if (dma_enable)
|
|
dma_ctrl |= DMA_EN;
|
|
bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
|
|
}
|
|
|
|
/* Initialize Rx queues
|
|
*
|
|
* Queues 0-15 are priority queues. Hardware Filtering Block (HFB) can be
|
|
* used to direct traffic to these queues.
|
|
*
|
|
* Queue 16 is the default Rx queue with GENET_Q16_RX_BD_CNT descriptors.
|
|
*/
|
|
static int bcmgenet_init_rx_queues(struct net_device *dev)
|
|
{
|
|
struct bcmgenet_priv *priv = netdev_priv(dev);
|
|
u32 i;
|
|
u32 dma_enable;
|
|
u32 dma_ctrl;
|
|
u32 ring_cfg;
|
|
int ret;
|
|
|
|
dma_ctrl = bcmgenet_rdma_readl(priv, DMA_CTRL);
|
|
dma_enable = dma_ctrl & DMA_EN;
|
|
dma_ctrl &= ~DMA_EN;
|
|
bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
|
|
|
|
dma_ctrl = 0;
|
|
ring_cfg = 0;
|
|
|
|
/* Initialize Rx priority queues */
|
|
for (i = 0; i < priv->hw_params->rx_queues; i++) {
|
|
ret = bcmgenet_init_rx_ring(priv, i,
|
|
priv->hw_params->rx_bds_per_q,
|
|
i * priv->hw_params->rx_bds_per_q,
|
|
(i + 1) *
|
|
priv->hw_params->rx_bds_per_q);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ring_cfg |= (1 << i);
|
|
dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
|
|
}
|
|
|
|
/* Initialize Rx default queue 16 */
|
|
ret = bcmgenet_init_rx_ring(priv, DESC_INDEX, GENET_Q16_RX_BD_CNT,
|
|
priv->hw_params->rx_queues *
|
|
priv->hw_params->rx_bds_per_q,
|
|
TOTAL_DESC);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ring_cfg |= (1 << DESC_INDEX);
|
|
dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
|
|
|
|
/* Enable rings */
|
|
bcmgenet_rdma_writel(priv, ring_cfg, DMA_RING_CFG);
|
|
|
|
/* Configure ring as descriptor ring and re-enable DMA if enabled */
|
|
if (dma_enable)
|
|
dma_ctrl |= DMA_EN;
|
|
bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_fini_dma(struct bcmgenet_priv *priv)
|
|
{
|
|
int i;
|
|
|
|
/* disable DMA */
|
|
bcmgenet_dma_teardown(priv);
|
|
|
|
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);
|
|
}
|
|
|
|
static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
|
|
{
|
|
int i;
|
|
|
|
bcmgenet_fini_tx_ring(priv, DESC_INDEX);
|
|
|
|
for (i = 0; i < priv->hw_params->tx_queues; i++)
|
|
bcmgenet_fini_tx_ring(priv, i);
|
|
|
|
__bcmgenet_fini_dma(priv);
|
|
}
|
|
|
|
/* init_edma: Initialize DMA control register */
|
|
static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
|
|
{
|
|
int ret;
|
|
unsigned int i;
|
|
struct enet_cb *cb;
|
|
|
|
netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
|
|
|
|
/* Init rDma */
|
|
bcmgenet_rdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE);
|
|
|
|
/* Initialize common Rx ring structures */
|
|
priv->rx_bds = priv->base + priv->hw_params->rdma_offset;
|
|
priv->num_rx_bds = TOTAL_DESC;
|
|
priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct enet_cb),
|
|
GFP_KERNEL);
|
|
if (!priv->rx_cbs)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < priv->num_rx_bds; i++) {
|
|
cb = priv->rx_cbs + i;
|
|
cb->bd_addr = priv->rx_bds + i * DMA_DESC_SIZE;
|
|
}
|
|
|
|
/* Initialize Rx queues */
|
|
ret = bcmgenet_init_rx_queues(priv->dev);
|
|
if (ret) {
|
|
netdev_err(priv->dev, "failed to initialize Rx queues\n");
|
|
bcmgenet_free_rx_buffers(priv);
|
|
kfree(priv->rx_cbs);
|
|
return ret;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
for (i = 0; i < priv->num_tx_bds; i++) {
|
|
cb = priv->tx_cbs + i;
|
|
cb->bd_addr = priv->tx_bds + i * DMA_DESC_SIZE;
|
|
}
|
|
|
|
/* Initialize Tx queues */
|
|
bcmgenet_init_tx_queues(priv->dev);
|
|
|
|
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;
|
|
|
|
work_done = bcmgenet_desc_rx(priv, DESC_INDEX, budget);
|
|
|
|
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;
|
|
struct bcmgenet_tx_ring *ring;
|
|
unsigned int index;
|
|
|
|
/* Save irq status for bottom-half processing. */
|
|
priv->irq1_stat =
|
|
bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_STAT) &
|
|
~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
|
|
/* 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
|
|
*/
|
|
for (index = 0; index < priv->hw_params->tx_queues; index++) {
|
|
if (!(priv->irq1_stat & BIT(index)))
|
|
continue;
|
|
|
|
ring = &priv->tx_rings[index];
|
|
|
|
if (likely(napi_schedule_prep(&ring->napi))) {
|
|
ring->int_disable(ring);
|
|
__napi_schedule(&ring->napi);
|
|
}
|
|
}
|
|
|
|
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)) {
|
|
struct bcmgenet_tx_ring *ring = &priv->tx_rings[DESC_INDEX];
|
|
|
|
if (likely(napi_schedule_prep(&ring->napi))) {
|
|
ring->int_disable(ring);
|
|
__napi_schedule(&ring->napi);
|
|
}
|
|
}
|
|
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);
|
|
}
|
|
|
|
/* 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 bool bcmgenet_hfb_is_filter_enabled(struct bcmgenet_priv *priv,
|
|
u32 f_index)
|
|
{
|
|
u32 offset;
|
|
u32 reg;
|
|
|
|
offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
|
|
reg = bcmgenet_hfb_reg_readl(priv, offset);
|
|
return !!(reg & (1 << (f_index % 32)));
|
|
}
|
|
|
|
static void bcmgenet_hfb_enable_filter(struct bcmgenet_priv *priv, u32 f_index)
|
|
{
|
|
u32 offset;
|
|
u32 reg;
|
|
|
|
offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
|
|
reg = bcmgenet_hfb_reg_readl(priv, offset);
|
|
reg |= (1 << (f_index % 32));
|
|
bcmgenet_hfb_reg_writel(priv, reg, offset);
|
|
}
|
|
|
|
static void bcmgenet_hfb_set_filter_rx_queue_mapping(struct bcmgenet_priv *priv,
|
|
u32 f_index, u32 rx_queue)
|
|
{
|
|
u32 offset;
|
|
u32 reg;
|
|
|
|
offset = f_index / 8;
|
|
reg = bcmgenet_rdma_readl(priv, DMA_INDEX2RING_0 + offset);
|
|
reg &= ~(0xF << (4 * (f_index % 8)));
|
|
reg |= ((rx_queue & 0xF) << (4 * (f_index % 8)));
|
|
bcmgenet_rdma_writel(priv, reg, DMA_INDEX2RING_0 + offset);
|
|
}
|
|
|
|
static void bcmgenet_hfb_set_filter_length(struct bcmgenet_priv *priv,
|
|
u32 f_index, u32 f_length)
|
|
{
|
|
u32 offset;
|
|
u32 reg;
|
|
|
|
offset = HFB_FLT_LEN_V3PLUS +
|
|
((priv->hw_params->hfb_filter_cnt - 1 - f_index) / 4) *
|
|
sizeof(u32);
|
|
reg = bcmgenet_hfb_reg_readl(priv, offset);
|
|
reg &= ~(0xFF << (8 * (f_index % 4)));
|
|
reg |= ((f_length & 0xFF) << (8 * (f_index % 4)));
|
|
bcmgenet_hfb_reg_writel(priv, reg, offset);
|
|
}
|
|
|
|
static int bcmgenet_hfb_find_unused_filter(struct bcmgenet_priv *priv)
|
|
{
|
|
u32 f_index;
|
|
|
|
for (f_index = 0; f_index < priv->hw_params->hfb_filter_cnt; f_index++)
|
|
if (!bcmgenet_hfb_is_filter_enabled(priv, f_index))
|
|
return f_index;
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* bcmgenet_hfb_add_filter
|
|
*
|
|
* Add new filter to Hardware Filter Block to match and direct Rx traffic to
|
|
* desired Rx queue.
|
|
*
|
|
* f_data is an array of unsigned 32-bit integers where each 32-bit integer
|
|
* provides filter data for 2 bytes (4 nibbles) of Rx frame:
|
|
*
|
|
* bits 31:20 - unused
|
|
* bit 19 - nibble 0 match enable
|
|
* bit 18 - nibble 1 match enable
|
|
* bit 17 - nibble 2 match enable
|
|
* bit 16 - nibble 3 match enable
|
|
* bits 15:12 - nibble 0 data
|
|
* bits 11:8 - nibble 1 data
|
|
* bits 7:4 - nibble 2 data
|
|
* bits 3:0 - nibble 3 data
|
|
*
|
|
* Example:
|
|
* In order to match:
|
|
* - Ethernet frame type = 0x0800 (IP)
|
|
* - IP version field = 4
|
|
* - IP protocol field = 0x11 (UDP)
|
|
*
|
|
* The following filter is needed:
|
|
* u32 hfb_filter_ipv4_udp[] = {
|
|
* Rx frame offset 0x00: 0x00000000, 0x00000000, 0x00000000, 0x00000000,
|
|
* Rx frame offset 0x08: 0x00000000, 0x00000000, 0x000F0800, 0x00084000,
|
|
* Rx frame offset 0x10: 0x00000000, 0x00000000, 0x00000000, 0x00030011,
|
|
* };
|
|
*
|
|
* To add the filter to HFB and direct the traffic to Rx queue 0, call:
|
|
* bcmgenet_hfb_add_filter(priv, hfb_filter_ipv4_udp,
|
|
* ARRAY_SIZE(hfb_filter_ipv4_udp), 0);
|
|
*/
|
|
int bcmgenet_hfb_add_filter(struct bcmgenet_priv *priv, u32 *f_data,
|
|
u32 f_length, u32 rx_queue)
|
|
{
|
|
int f_index;
|
|
u32 i;
|
|
|
|
f_index = bcmgenet_hfb_find_unused_filter(priv);
|
|
if (f_index < 0)
|
|
return -ENOMEM;
|
|
|
|
if (f_length > priv->hw_params->hfb_filter_size)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < f_length; i++)
|
|
bcmgenet_hfb_writel(priv, f_data[i],
|
|
(f_index * priv->hw_params->hfb_filter_size + i) *
|
|
sizeof(u32));
|
|
|
|
bcmgenet_hfb_set_filter_length(priv, f_index, 2 * f_length);
|
|
bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f_index, rx_queue);
|
|
bcmgenet_hfb_enable_filter(priv, f_index);
|
|
bcmgenet_hfb_reg_writel(priv, 0x1, HFB_CTRL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* bcmgenet_hfb_clear
|
|
*
|
|
* Clear Hardware Filter Block and disable all filtering.
|
|
*/
|
|
static void bcmgenet_hfb_clear(struct bcmgenet_priv *priv)
|
|
{
|
|
u32 i;
|
|
|
|
bcmgenet_hfb_reg_writel(priv, 0x0, HFB_CTRL);
|
|
bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS);
|
|
bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS + 4);
|
|
|
|
for (i = DMA_INDEX2RING_0; i <= DMA_INDEX2RING_7; i++)
|
|
bcmgenet_rdma_writel(priv, 0x0, i);
|
|
|
|
for (i = 0; i < (priv->hw_params->hfb_filter_cnt / 4); i++)
|
|
bcmgenet_hfb_reg_writel(priv, 0x0,
|
|
HFB_FLT_LEN_V3PLUS + i * sizeof(u32));
|
|
|
|
for (i = 0; i < priv->hw_params->hfb_filter_cnt *
|
|
priv->hw_params->hfb_filter_size; i++)
|
|
bcmgenet_hfb_writel(priv, 0x0, i * sizeof(u32));
|
|
}
|
|
|
|
static void bcmgenet_hfb_init(struct bcmgenet_priv *priv)
|
|
{
|
|
if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
|
|
return;
|
|
|
|
bcmgenet_hfb_clear(priv);
|
|
}
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
/* If this is an internal GPHY, power it back on now, before UniMAC is
|
|
* brought out of reset as absolutely no UniMAC activity is allowed
|
|
*/
|
|
if (phy_is_internal(priv->phydev))
|
|
bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
|
|
|
|
/* 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);
|
|
|
|
/* HFB init */
|
|
bcmgenet_hfb_init(priv);
|
|
|
|
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;
|
|
}
|
|
|
|
/* Re-configure the port multiplexer towards the PHY device */
|
|
bcmgenet_mii_config(priv->dev, false);
|
|
|
|
phy_connect_direct(dev, priv->phydev, bcmgenet_mii_setup,
|
|
priv->phy_interface);
|
|
|
|
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 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);
|
|
|
|
priv->old_link = -1;
|
|
priv->old_speed = -1;
|
|
priv->old_duplex = -1;
|
|
priv->old_pause = -1;
|
|
}
|
|
|
|
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);
|
|
|
|
/* Really kill the PHY state machine and disconnect from it */
|
|
phy_disconnect(priv->phydev);
|
|
|
|
/* 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))
|
|
ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
|
|
|
|
if (!IS_ERR(priv->clk))
|
|
clk_disable_unprepare(priv->clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
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,
|
|
.tx_bds_per_q = 0,
|
|
.rx_queues = 0,
|
|
.rx_bds_per_q = 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,
|
|
.tx_bds_per_q = 32,
|
|
.rx_queues = 0,
|
|
.rx_bds_per_q = 0,
|
|
.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,
|
|
.tx_bds_per_q = 32,
|
|
.rx_queues = 0,
|
|
.rx_bds_per_q = 0,
|
|
.bp_in_en_shift = 17,
|
|
.bp_in_mask = 0x1ffff,
|
|
.hfb_filter_cnt = 48,
|
|
.hfb_filter_size = 128,
|
|
.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,
|
|
.tx_bds_per_q = 32,
|
|
.rx_queues = 0,
|
|
.rx_bds_per_q = 0,
|
|
.bp_in_en_shift = 17,
|
|
.bp_in_mask = 0x1ffff,
|
|
.hfb_filter_cnt = 48,
|
|
.hfb_filter_size = 128,
|
|
.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;
|
|
u16 gphy_rev;
|
|
|
|
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);
|
|
|
|
/* Store the integrated PHY revision for the MDIO probing function
|
|
* to pass this information to the PHY driver. The PHY driver expects
|
|
* to find the PHY major revision in bits 15:8 while the GENET register
|
|
* stores that information in bits 7:0, account for that.
|
|
*
|
|
* On newer chips, starting with PHY revision G0, a new scheme is
|
|
* deployed similar to the Starfighter 2 switch with GPHY major
|
|
* revision in bits 15:8 and patch level in bits 7:0. Major revision 0
|
|
* is reserved as well as special value 0x01ff, we have a small
|
|
* heuristic to check for the new GPHY revision and re-arrange things
|
|
* so the GPHY driver is happy.
|
|
*/
|
|
gphy_rev = reg & 0xffff;
|
|
|
|
/* This is the good old scheme, just GPHY major, no minor nor patch */
|
|
if ((gphy_rev & 0xf0) != 0)
|
|
priv->gphy_rev = gphy_rev << 8;
|
|
|
|
/* This is the new scheme, GPHY major rolls over with 0x10 = rev G0 */
|
|
else if ((gphy_rev & 0xff00) != 0)
|
|
priv->gphy_rev = gphy_rev;
|
|
|
|
/* This is reserved so should require special treatment */
|
|
else if (gphy_rev == 0 || gphy_rev == 0x01ff) {
|
|
pr_warn("Invalid GPHY revision detected: 0x%04x\n", gphy_rev);
|
|
return;
|
|
}
|
|
|
|
#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, TXqBDs: %1d, RXq: %1d, RXqBDs: %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->tx_bds_per_q,
|
|
params->rx_queues, params->rx_bds_per_q,
|
|
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 bcmgenet_platform_data *pd = pdev->dev.platform_data;
|
|
struct device_node *dn = pdev->dev.of_node;
|
|
const struct of_device_id *of_id = NULL;
|
|
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 RX queues */
|
|
dev = alloc_etherdev_mqs(sizeof(*priv), GENET_MAX_MQ_CNT + 1,
|
|
GENET_MAX_MQ_CNT + 1);
|
|
if (!dev) {
|
|
dev_err(&pdev->dev, "can't allocate net device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (dn) {
|
|
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;
|
|
}
|
|
|
|
if (dn) {
|
|
macaddr = of_get_mac_address(dn);
|
|
if (!macaddr) {
|
|
dev_err(&pdev->dev, "can't find MAC address\n");
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
} else {
|
|
macaddr = pd->mac_address;
|
|
}
|
|
|
|
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;
|
|
if (of_id)
|
|
priv->version = (enum bcmgenet_version)of_id->data;
|
|
else
|
|
priv->version = pd->genet_version;
|
|
|
|
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");
|
|
|
|
priv->clk_eee = devm_clk_get(&priv->pdev->dev, "enet-eee");
|
|
if (IS_ERR(priv->clk_eee)) {
|
|
dev_warn(&priv->pdev->dev, "failed to get enet-eee clock\n");
|
|
priv->clk_eee = NULL;
|
|
}
|
|
|
|
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);
|
|
|
|
phy_suspend(priv->phydev);
|
|
|
|
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) {
|
|
ret = bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);
|
|
clk_prepare_enable(priv->clk_wol);
|
|
} else if (phy_is_internal(priv->phydev)) {
|
|
ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
|
|
}
|
|
|
|
/* Turn off the clocks */
|
|
clk_disable_unprepare(priv->clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
|
|
/* If this is an internal GPHY, power it back on now, before UniMAC is
|
|
* brought out of reset as absolutely no UniMAC activity is allowed
|
|
*/
|
|
if (phy_is_internal(priv->phydev))
|
|
bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
|
|
|
|
bcmgenet_umac_reset(priv);
|
|
|
|
ret = init_umac(priv);
|
|
if (ret)
|
|
goto out_clk_disable;
|
|
|
|
/* From WOL-enabled suspend, switch to regular clock */
|
|
if (priv->wolopts)
|
|
clk_disable_unprepare(priv->clk_wol);
|
|
|
|
phy_init_hw(priv->phydev);
|
|
/* Speed settings must be restored */
|
|
bcmgenet_mii_config(priv->dev, false);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
if (priv->wolopts)
|
|
bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
|
|
|
|
/* 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);
|
|
|
|
phy_resume(priv->phydev);
|
|
|
|
if (priv->eee.eee_enabled)
|
|
bcmgenet_eee_enable_set(dev, true);
|
|
|
|
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",
|
|
.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");
|