[linux-2.6-block.git] / drivers / net / gianfar.h

/*
 * drivers/net/gianfar.h
 *
 * Gianfar Ethernet Driver
 * Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
 * Based on 8260_io/fcc_enet.c
 *
 * Author: Andy Fleming
 * Maintainer: Kumar Gala
 * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
 *
 * Copyright 2002-2009 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 *  Still left to do:
 *      -Add support for module parameters
 *      -Add patch for ethtool phys id
 */
#ifndef __GIANFAR_H
#define __GIANFAR_H

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/mii.h>
#include <linux/phy.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/crc32.h>
#include <linux/workqueue.h>
#include <linux/ethtool.h>

/* The maximum number of packets to be handled in one call of gfar_poll */
#define GFAR_DEV_WEIGHT 64

/* Length for FCB */
#define GMAC_FCB_LEN 8

/* Default padding amount */
#define DEFAULT_PADDING 2

/* Number of bytes to align the rx bufs to */
#define RXBUF_ALIGNMENT 64

/* The number of bytes which composes a unit for the purpose of
 * allocating data buffers.  ie-for any given MTU, the data buffer
 * will be the next highest multiple of 512 bytes. */
#define INCREMENTAL_BUFFER_SIZE 512


#define MAC_ADDR_LEN 6

#define PHY_INIT_TIMEOUT 100000
#define GFAR_PHY_CHANGE_TIME 2

#define DEVICE_NAME "%s: Gianfar Ethernet Controller Version 1.2, "
#define DRV_NAME "gfar-enet"
extern const char gfar_driver_name[];
extern const char gfar_driver_version[];

/* MAXIMUM NUMBER OF QUEUES SUPPORTED */
#define MAX_TX_QS       0x8
#define MAX_RX_QS       0x8

/* MAXIMUM NUMBER OF GROUPS SUPPORTED */
#define MAXGROUPS 0x2

/* These need to be powers of 2 for this driver */
#define DEFAULT_TX_RING_SIZE    256
#define DEFAULT_RX_RING_SIZE    256

#define GFAR_RX_MAX_RING_SIZE   256
#define GFAR_TX_MAX_RING_SIZE   256

#define GFAR_MAX_FIFO_THRESHOLD 511
#define GFAR_MAX_FIFO_STARVE    511
#define GFAR_MAX_FIFO_STARVE_OFF 511

#define DEFAULT_RX_BUFFER_SIZE  1536
#define TX_RING_MOD_MASK(size) (size-1)
#define RX_RING_MOD_MASK(size) (size-1)
#define JUMBO_BUFFER_SIZE 9728
#define JUMBO_FRAME_SIZE 9600

#define DEFAULT_FIFO_TX_THR 0x100
#define DEFAULT_FIFO_TX_STARVE 0x40
#define DEFAULT_FIFO_TX_STARVE_OFF 0x80
#define DEFAULT_BD_STASH 1
#define DEFAULT_STASH_LENGTH    96
#define DEFAULT_STASH_INDEX     0

/* The number of Exact Match registers */
#define GFAR_EM_NUM     15

/* Latency of interface clock in nanoseconds */
/* Interface clock latency , in this case, means the
 * time described by a value of 1 in the interrupt
 * coalescing registers' time fields.  Since those fields
 * refer to the time it takes for 64 clocks to pass, the
 * latencies are as such:
 * GBIT = 125MHz => 8ns/clock => 8*64 ns / tick
 * 100 = 25 MHz => 40ns/clock => 40*64 ns / tick
 * 10 = 2.5 MHz => 400ns/clock => 400*64 ns / tick
 */
#define GFAR_GBIT_TIME  512
#define GFAR_100_TIME   2560
#define GFAR_10_TIME    25600

#define DEFAULT_TX_COALESCE 1
#define DEFAULT_TXCOUNT 16
#define DEFAULT_TXTIME  21

#define DEFAULT_RXTIME  21

#define DEFAULT_RX_COALESCE 0
#define DEFAULT_RXCOUNT 0

#define GFAR_SUPPORTED (SUPPORTED_10baseT_Half \
                | SUPPORTED_10baseT_Full \
                | SUPPORTED_100baseT_Half \
                | SUPPORTED_100baseT_Full \
                | SUPPORTED_Autoneg \
                | SUPPORTED_MII)

/* TBI register addresses */
#define MII_TBICON              0x11

/* TBICON register bit fields */
#define TBICON_CLK_SELECT       0x0020

/* MAC register bits */
#define MACCFG1_SOFT_RESET      0x80000000
#define MACCFG1_RESET_RX_MC     0x00080000
#define MACCFG1_RESET_TX_MC     0x00040000
#define MACCFG1_RESET_RX_FUN    0x00020000
#define MACCFG1_RESET_TX_FUN    0x00010000
#define MACCFG1_LOOPBACK        0x00000100
#define MACCFG1_RX_FLOW         0x00000020
#define MACCFG1_TX_FLOW         0x00000010
#define MACCFG1_SYNCD_RX_EN     0x00000008
#define MACCFG1_RX_EN           0x00000004
#define MACCFG1_SYNCD_TX_EN     0x00000002
#define MACCFG1_TX_EN           0x00000001

#define MACCFG2_INIT_SETTINGS   0x00007205
#define MACCFG2_FULL_DUPLEX     0x00000001
#define MACCFG2_IF              0x00000300
#define MACCFG2_MII             0x00000100
#define MACCFG2_GMII            0x00000200
#define MACCFG2_HUGEFRAME       0x00000020
#define MACCFG2_LENGTHCHECK     0x00000010
#define MACCFG2_MPEN            0x00000008

#define ECNTRL_INIT_SETTINGS    0x00001000
#define ECNTRL_TBI_MODE         0x00000020
#define ECNTRL_REDUCED_MODE     0x00000010
#define ECNTRL_R100             0x00000008
#define ECNTRL_REDUCED_MII_MODE 0x00000004
#define ECNTRL_SGMII_MODE       0x00000002

#define MRBLR_INIT_SETTINGS     DEFAULT_RX_BUFFER_SIZE

#define MINFLR_INIT_SETTINGS    0x00000040

/* Tqueue control */
#define TQUEUE_EN0              0x00008000
#define TQUEUE_EN1              0x00004000
#define TQUEUE_EN2              0x00002000
#define TQUEUE_EN3              0x00001000
#define TQUEUE_EN4              0x00000800
#define TQUEUE_EN5              0x00000400
#define TQUEUE_EN6              0x00000200
#define TQUEUE_EN7              0x00000100
#define TQUEUE_EN_ALL           0x0000FF00

#define TR03WT_WT0_MASK         0xFF000000
#define TR03WT_WT1_MASK         0x00FF0000
#define TR03WT_WT2_MASK         0x0000FF00
#define TR03WT_WT3_MASK         0x000000FF

#define TR47WT_WT4_MASK         0xFF000000
#define TR47WT_WT5_MASK         0x00FF0000
#define TR47WT_WT6_MASK         0x0000FF00
#define TR47WT_WT7_MASK         0x000000FF

/* Rqueue control */
#define RQUEUE_EX0              0x00800000
#define RQUEUE_EX1              0x00400000
#define RQUEUE_EX2              0x00200000
#define RQUEUE_EX3              0x00100000
#define RQUEUE_EX4              0x00080000
#define RQUEUE_EX5              0x00040000
#define RQUEUE_EX6              0x00020000
#define RQUEUE_EX7              0x00010000
#define RQUEUE_EX_ALL           0x00FF0000

#define RQUEUE_EN0              0x00000080
#define RQUEUE_EN1              0x00000040
#define RQUEUE_EN2              0x00000020
#define RQUEUE_EN3              0x00000010
#define RQUEUE_EN4              0x00000008
#define RQUEUE_EN5              0x00000004
#define RQUEUE_EN6              0x00000002
#define RQUEUE_EN7              0x00000001
#define RQUEUE_EN_ALL           0x000000FF

/* Init to do tx snooping for buffers and descriptors */
#define DMACTRL_INIT_SETTINGS   0x000000c3
#define DMACTRL_GRS             0x00000010
#define DMACTRL_GTS             0x00000008

#define TSTAT_CLEAR_THALT_ALL   0xFF000000
#define TSTAT_CLEAR_THALT       0x80000000
#define TSTAT_CLEAR_THALT0      0x80000000
#define TSTAT_CLEAR_THALT1      0x40000000
#define TSTAT_CLEAR_THALT2      0x20000000
#define TSTAT_CLEAR_THALT3      0x10000000
#define TSTAT_CLEAR_THALT4      0x08000000
#define TSTAT_CLEAR_THALT5      0x04000000
#define TSTAT_CLEAR_THALT6      0x02000000
#define TSTAT_CLEAR_THALT7      0x01000000

/* Interrupt coalescing macros */
#define IC_ICEN                 0x80000000
#define IC_ICFT_MASK            0x1fe00000
#define IC_ICFT_SHIFT           21
#define mk_ic_icft(x)           \
        (((unsigned int)x << IC_ICFT_SHIFT)&IC_ICFT_MASK)
#define IC_ICTT_MASK            0x0000ffff
#define mk_ic_ictt(x)           (x&IC_ICTT_MASK)

#define mk_ic_value(count, time) (IC_ICEN | \
                                mk_ic_icft(count) | \
                                mk_ic_ictt(time))
#define get_icft_value(ic)      (((unsigned long)ic & IC_ICFT_MASK) >> \
                                 IC_ICFT_SHIFT)
#define get_ictt_value(ic)      ((unsigned long)ic & IC_ICTT_MASK)

#define DEFAULT_TXIC mk_ic_value(DEFAULT_TXCOUNT, DEFAULT_TXTIME)
#define DEFAULT_RXIC mk_ic_value(DEFAULT_RXCOUNT, DEFAULT_RXTIME)

#define skip_bd(bdp, stride, base, ring_size) ({ \
        typeof(bdp) new_bd = (bdp) + (stride); \
        (new_bd >= (base) + (ring_size)) ? (new_bd - (ring_size)) : new_bd; })

#define next_bd(bdp, base, ring_size) skip_bd(bdp, 1, base, ring_size)

#define RCTRL_PAL_MASK          0x001f0000
#define RCTRL_VLEX              0x00002000
#define RCTRL_FILREN            0x00001000
#define RCTRL_GHTX              0x00000400
#define RCTRL_IPCSEN            0x00000200
#define RCTRL_TUCSEN            0x00000100
#define RCTRL_PRSDEP_MASK       0x000000c0
#define RCTRL_PRSDEP_INIT       0x000000c0
#define RCTRL_PROM              0x00000008
#define RCTRL_EMEN              0x00000002
#define RCTRL_REQ_PARSER        (RCTRL_VLEX | RCTRL_IPCSEN | \
                                 RCTRL_TUCSEN)
#define RCTRL_CHECKSUMMING      (RCTRL_IPCSEN | RCTRL_TUCSEN | \
                                RCTRL_PRSDEP_INIT)
#define RCTRL_EXTHASH           (RCTRL_GHTX)
#define RCTRL_VLAN              (RCTRL_PRSDEP_INIT)
#define RCTRL_PADDING(x)        ((x << 16) & RCTRL_PAL_MASK)


#define RSTAT_CLEAR_RHALT       0x00800000

#define TCTRL_IPCSEN            0x00004000
#define TCTRL_TUCSEN            0x00002000
#define TCTRL_VLINS             0x00001000
#define TCTRL_THDF              0x00000800
#define TCTRL_RFCPAUSE          0x00000010
#define TCTRL_TFCPAUSE          0x00000008
#define TCTRL_TXSCHED_MASK      0x00000006
#define TCTRL_TXSCHED_INIT      0x00000000
#define TCTRL_TXSCHED_PRIO      0x00000002
#define TCTRL_TXSCHED_WRRS      0x00000004
#define TCTRL_INIT_CSUM         (TCTRL_TUCSEN | TCTRL_IPCSEN)

#define IEVENT_INIT_CLEAR       0xffffffff
#define IEVENT_BABR             0x80000000
#define IEVENT_RXC              0x40000000
#define IEVENT_BSY              0x20000000
#define IEVENT_EBERR            0x10000000
#define IEVENT_MSRO             0x04000000
#define IEVENT_GTSC             0x02000000
#define IEVENT_BABT             0x01000000
#define IEVENT_TXC              0x00800000
#define IEVENT_TXE              0x00400000
#define IEVENT_TXB              0x00200000
#define IEVENT_TXF              0x00100000
#define IEVENT_LC               0x00040000
#define IEVENT_CRL              0x00020000
#define IEVENT_XFUN             0x00010000
#define IEVENT_RXB0             0x00008000
#define IEVENT_MAG              0x00000800
#define IEVENT_GRSC             0x00000100
#define IEVENT_RXF0             0x00000080
#define IEVENT_FIR              0x00000008
#define IEVENT_FIQ              0x00000004
#define IEVENT_DPE              0x00000002
#define IEVENT_PERR             0x00000001
#define IEVENT_RX_MASK          (IEVENT_RXB0 | IEVENT_RXF0 | IEVENT_BSY)
#define IEVENT_TX_MASK          (IEVENT_TXB | IEVENT_TXF)
#define IEVENT_RTX_MASK         (IEVENT_RX_MASK | IEVENT_TX_MASK)
#define IEVENT_ERR_MASK         \
(IEVENT_RXC | IEVENT_BSY | IEVENT_EBERR | IEVENT_MSRO | \
 IEVENT_BABT | IEVENT_TXC | IEVENT_TXE | IEVENT_LC \
 | IEVENT_CRL | IEVENT_XFUN | IEVENT_DPE | IEVENT_PERR \
 | IEVENT_MAG | IEVENT_BABR)

#define IMASK_INIT_CLEAR        0x00000000
#define IMASK_BABR              0x80000000
#define IMASK_RXC               0x40000000
#define IMASK_BSY               0x20000000
#define IMASK_EBERR             0x10000000
#define IMASK_MSRO              0x04000000
#define IMASK_GRSC              0x02000000
#define IMASK_BABT              0x01000000
#define IMASK_TXC               0x00800000
#define IMASK_TXEEN             0x00400000
#define IMASK_TXBEN             0x00200000
#define IMASK_TXFEN             0x00100000
#define IMASK_LC                0x00040000
#define IMASK_CRL               0x00020000
#define IMASK_XFUN              0x00010000
#define IMASK_RXB0              0x00008000
#define IMASK_MAG               0x00000800
#define IMASK_GTSC              0x00000100
#define IMASK_RXFEN0            0x00000080
#define IMASK_FIR               0x00000008
#define IMASK_FIQ               0x00000004
#define IMASK_DPE               0x00000002
#define IMASK_PERR              0x00000001
#define IMASK_DEFAULT  (IMASK_TXEEN | IMASK_TXFEN | IMASK_TXBEN | \
                IMASK_RXFEN0 | IMASK_BSY | IMASK_EBERR | IMASK_BABR | \
                IMASK_XFUN | IMASK_RXC | IMASK_BABT | IMASK_DPE \
                | IMASK_PERR)
#define IMASK_RTX_DISABLED ((~(IMASK_RXFEN0 | IMASK_TXFEN | IMASK_BSY)) \
                           & IMASK_DEFAULT)

/* Fifo management */
#define FIFO_TX_THR_MASK        0x01ff
#define FIFO_TX_STARVE_MASK     0x01ff
#define FIFO_TX_STARVE_OFF_MASK 0x01ff

/* Attribute fields */

/* This enables rx snooping for buffers and descriptors */
#define ATTR_BDSTASH            0x00000800

#define ATTR_BUFSTASH           0x00004000

#define ATTR_SNOOPING           0x000000c0
#define ATTR_INIT_SETTINGS      ATTR_SNOOPING

#define ATTRELI_INIT_SETTINGS   0x0
#define ATTRELI_EL_MASK         0x3fff0000
#define ATTRELI_EL(x) (x << 16)
#define ATTRELI_EI_MASK         0x00003fff
#define ATTRELI_EI(x) (x)

#define BD_LFLAG(flags) ((flags) << 16)
#define BD_LENGTH_MASK          0x0000ffff

/* TxBD status field bits */
#define TXBD_READY              0x8000
#define TXBD_PADCRC             0x4000
#define TXBD_WRAP               0x2000
#define TXBD_INTERRUPT          0x1000
#define TXBD_LAST               0x0800
#define TXBD_CRC                0x0400
#define TXBD_DEF                0x0200
#define TXBD_HUGEFRAME          0x0080
#define TXBD_LATECOLLISION      0x0080
#define TXBD_RETRYLIMIT         0x0040
#define TXBD_RETRYCOUNTMASK     0x003c
#define TXBD_UNDERRUN           0x0002
#define TXBD_TOE                0x0002

/* Tx FCB param bits */
#define TXFCB_VLN               0x80
#define TXFCB_IP                0x40
#define TXFCB_IP6               0x20
#define TXFCB_TUP               0x10
#define TXFCB_UDP               0x08
#define TXFCB_CIP               0x04
#define TXFCB_CTU               0x02
#define TXFCB_NPH               0x01
#define TXFCB_DEFAULT           (TXFCB_IP|TXFCB_TUP|TXFCB_CTU|TXFCB_NPH)

/* RxBD status field bits */
#define RXBD_EMPTY              0x8000
#define RXBD_RO1                0x4000
#define RXBD_WRAP               0x2000
#define RXBD_INTERRUPT          0x1000
#define RXBD_LAST               0x0800
#define RXBD_FIRST              0x0400
#define RXBD_MISS               0x0100
#define RXBD_BROADCAST          0x0080
#define RXBD_MULTICAST          0x0040
#define RXBD_LARGE              0x0020
#define RXBD_NONOCTET           0x0010
#define RXBD_SHORT              0x0008
#define RXBD_CRCERR             0x0004
#define RXBD_OVERRUN            0x0002
#define RXBD_TRUNCATED          0x0001
#define RXBD_STATS              0x01ff
#define RXBD_ERR                (RXBD_LARGE | RXBD_SHORT | RXBD_NONOCTET        \
                                | RXBD_CRCERR | RXBD_OVERRUN                    \
                                | RXBD_TRUNCATED)

/* Rx FCB status field bits */
#define RXFCB_VLN               0x8000
#define RXFCB_IP                0x4000
#define RXFCB_IP6               0x2000
#define RXFCB_TUP               0x1000
#define RXFCB_CIP               0x0800
#define RXFCB_CTU               0x0400
#define RXFCB_EIP               0x0200
#define RXFCB_ETU               0x0100
#define RXFCB_CSUM_MASK         0x0f00
#define RXFCB_PERR_MASK         0x000c
#define RXFCB_PERR_BADL3        0x0008

#define GFAR_INT_NAME_MAX       IFNAMSIZ + 4

struct txbd8
{
        union {
                struct {
                        u16     status; /* Status Fields */
                        u16     length; /* Buffer length */
                };
                u32 lstatus;
        };
        u32     bufPtr; /* Buffer Pointer */
};

struct txfcb {
        u8      flags;
        u8      reserved;
        u8      l4os;   /* Level 4 Header Offset */
        u8      l3os;   /* Level 3 Header Offset */
        u16     phcs;   /* Pseudo-header Checksum */
        u16     vlctl;  /* VLAN control word */
};

struct rxbd8
{
        union {
                struct {
                        u16     status; /* Status Fields */
                        u16     length; /* Buffer Length */
                };
                u32 lstatus;
        };
        u32     bufPtr; /* Buffer Pointer */
};

struct rxfcb {
        u16     flags;
        u8      rq;     /* Receive Queue index */
        u8      pro;    /* Layer 4 Protocol */
        u16     reserved;
        u16     vlctl;  /* VLAN control word */
};

struct rmon_mib
{
        u32     tr64;   /* 0x.680 - Transmit and Receive 64-byte Frame Counter */
        u32     tr127;  /* 0x.684 - Transmit and Receive 65-127 byte Frame Counter */
        u32     tr255;  /* 0x.688 - Transmit and Receive 128-255 byte Frame Counter */
        u32     tr511;  /* 0x.68c - Transmit and Receive 256-511 byte Frame Counter */
        u32     tr1k;   /* 0x.690 - Transmit and Receive 512-1023 byte Frame Counter */
        u32     trmax;  /* 0x.694 - Transmit and Receive 1024-1518 byte Frame Counter */
        u32     trmgv;  /* 0x.698 - Transmit and Receive 1519-1522 byte Good VLAN Frame */
        u32     rbyt;   /* 0x.69c - Receive Byte Counter */
        u32     rpkt;   /* 0x.6a0 - Receive Packet Counter */
        u32     rfcs;   /* 0x.6a4 - Receive FCS Error Counter */
        u32     rmca;   /* 0x.6a8 - Receive Multicast Packet Counter */
        u32     rbca;   /* 0x.6ac - Receive Broadcast Packet Counter */
        u32     rxcf;   /* 0x.6b0 - Receive Control Frame Packet Counter */
        u32     rxpf;   /* 0x.6b4 - Receive Pause Frame Packet Counter */
        u32     rxuo;   /* 0x.6b8 - Receive Unknown OP Code Counter */
        u32     raln;   /* 0x.6bc - Receive Alignment Error Counter */
        u32     rflr;   /* 0x.6c0 - Receive Frame Length Error Counter */
        u32     rcde;   /* 0x.6c4 - Receive Code Error Counter */
        u32     rcse;   /* 0x.6c8 - Receive Carrier Sense Error Counter */
        u32     rund;   /* 0x.6cc - Receive Undersize Packet Counter */
        u32     rovr;   /* 0x.6d0 - Receive Oversize Packet Counter */
        u32     rfrg;   /* 0x.6d4 - Receive Fragments Counter */
        u32     rjbr;   /* 0x.6d8 - Receive Jabber Counter */
        u32     rdrp;   /* 0x.6dc - Receive Drop Counter */
        u32     tbyt;   /* 0x.6e0 - Transmit Byte Counter Counter */
        u32     tpkt;   /* 0x.6e4 - Transmit Packet Counter */
        u32     tmca;   /* 0x.6e8 - Transmit Multicast Packet Counter */
        u32     tbca;   /* 0x.6ec - Transmit Broadcast Packet Counter */
        u32     txpf;   /* 0x.6f0 - Transmit Pause Control Frame Counter */
        u32     tdfr;   /* 0x.6f4 - Transmit Deferral Packet Counter */
        u32     tedf;   /* 0x.6f8 - Transmit Excessive Deferral Packet Counter */
        u32     tscl;   /* 0x.6fc - Transmit Single Collision Packet Counter */
        u32     tmcl;   /* 0x.700 - Transmit Multiple Collision Packet Counter */
        u32     tlcl;   /* 0x.704 - Transmit Late Collision Packet Counter */
        u32     txcl;   /* 0x.708 - Transmit Excessive Collision Packet Counter */
        u32     tncl;   /* 0x.70c - Transmit Total Collision Counter */
        u8      res1[4];
        u32     tdrp;   /* 0x.714 - Transmit Drop Frame Counter */
        u32     tjbr;   /* 0x.718 - Transmit Jabber Frame Counter */
        u32     tfcs;   /* 0x.71c - Transmit FCS Error Counter */
        u32     txcf;   /* 0x.720 - Transmit Control Frame Counter */
        u32     tovr;   /* 0x.724 - Transmit Oversize Frame Counter */
        u32     tund;   /* 0x.728 - Transmit Undersize Frame Counter */
        u32     tfrg;   /* 0x.72c - Transmit Fragments Frame Counter */
        u32     car1;   /* 0x.730 - Carry Register One */
        u32     car2;   /* 0x.734 - Carry Register Two */
        u32     cam1;   /* 0x.738 - Carry Mask Register One */
        u32     cam2;   /* 0x.73c - Carry Mask Register Two */
};

struct gfar_extra_stats {
        u64 kernel_dropped;
        u64 rx_large;
        u64 rx_short;
        u64 rx_nonoctet;
        u64 rx_crcerr;
        u64 rx_overrun;
        u64 rx_bsy;
        u64 rx_babr;
        u64 rx_trunc;
        u64 eberr;
        u64 tx_babt;
        u64 tx_underrun;
        u64 rx_skbmissing;
        u64 tx_timeout;
};

#define GFAR_RMON_LEN ((sizeof(struct rmon_mib) - 16)/sizeof(u32))
#define GFAR_EXTRA_STATS_LEN (sizeof(struct gfar_extra_stats)/sizeof(u64))

/* Number of stats in the stats structure (ignore car and cam regs)*/
#define GFAR_STATS_LEN (GFAR_RMON_LEN + GFAR_EXTRA_STATS_LEN)

#define GFAR_INFOSTR_LEN 32

struct gfar_stats {
        u64 extra[GFAR_EXTRA_STATS_LEN];
        u64 rmon[GFAR_RMON_LEN];
};


struct gfar {
        u32     tsec_id;        /* 0x.000 - Controller ID register */
        u32     tsec_id2;       /* 0x.004 - Controller ID2 register */
        u8      res1[8];
        u32     ievent;         /* 0x.010 - Interrupt Event Register */
        u32     imask;          /* 0x.014 - Interrupt Mask Register */
        u32     edis;           /* 0x.018 - Error Disabled Register */
        u32     emapg;          /* 0x.01c - Group Error mapping register */
        u32     ecntrl;         /* 0x.020 - Ethernet Control Register */
        u32     minflr;         /* 0x.024 - Minimum Frame Length Register */
        u32     ptv;            /* 0x.028 - Pause Time Value Register */
        u32     dmactrl;        /* 0x.02c - DMA Control Register */
        u32     tbipa;          /* 0x.030 - TBI PHY Address Register */
        u8      res2[28];
        u32     fifo_rx_pause;  /* 0x.050 - FIFO receive pause start threshold
                                        register */
        u32     fifo_rx_pause_shutoff;  /* x.054 - FIFO receive starve shutoff
                                                register */
        u32     fifo_rx_alarm;  /* 0x.058 - FIFO receive alarm start threshold
                                                register */
        u32     fifo_rx_alarm_shutoff;  /*0x.05c - FIFO receive alarm  starve
                                                shutoff register */
        u8      res3[44];
        u32     fifo_tx_thr;    /* 0x.08c - FIFO transmit threshold register */
        u8      res4[8];
        u32     fifo_tx_starve; /* 0x.098 - FIFO transmit starve register */
        u32     fifo_tx_starve_shutoff; /* 0x.09c - FIFO transmit starve shutoff register */
        u8      res5[96];
        u32     tctrl;          /* 0x.100 - Transmit Control Register */
        u32     tstat;          /* 0x.104 - Transmit Status Register */
        u32     dfvlan;         /* 0x.108 - Default VLAN Control word */
        u32     tbdlen;         /* 0x.10c - Transmit Buffer Descriptor Data Length Register */
        u32     txic;           /* 0x.110 - Transmit Interrupt Coalescing Configuration Register */
        u32     tqueue;         /* 0x.114 - Transmit queue control register */
        u8      res7[40];
        u32     tr03wt;         /* 0x.140 - TxBD Rings 0-3 round-robin weightings */
        u32     tr47wt;         /* 0x.144 - TxBD Rings 4-7 round-robin weightings */
        u8      res8[52];
        u32     tbdbph;         /* 0x.17c - Tx data buffer pointer high */
        u8      res9a[4];
        u32     tbptr0;         /* 0x.184 - TxBD Pointer for ring 0 */
        u8      res9b[4];
        u32     tbptr1;         /* 0x.18c - TxBD Pointer for ring 1 */
        u8      res9c[4];
        u32     tbptr2;         /* 0x.194 - TxBD Pointer for ring 2 */
        u8      res9d[4];
        u32     tbptr3;         /* 0x.19c - TxBD Pointer for ring 3 */
        u8      res9e[4];
        u32     tbptr4;         /* 0x.1a4 - TxBD Pointer for ring 4 */
        u8      res9f[4];
        u32     tbptr5;         /* 0x.1ac - TxBD Pointer for ring 5 */
        u8      res9g[4];
        u32     tbptr6;         /* 0x.1b4 - TxBD Pointer for ring 6 */
        u8      res9h[4];
        u32     tbptr7;         /* 0x.1bc - TxBD Pointer for ring 7 */
        u8      res9[64];
        u32     tbaseh;         /* 0x.200 - TxBD base address high */
        u32     tbase0;         /* 0x.204 - TxBD Base Address of ring 0 */
        u8      res10a[4];
        u32     tbase1;         /* 0x.20c - TxBD Base Address of ring 1 */
        u8      res10b[4];
        u32     tbase2;         /* 0x.214 - TxBD Base Address of ring 2 */
        u8      res10c[4];
        u32     tbase3;         /* 0x.21c - TxBD Base Address of ring 3 */
        u8      res10d[4];
        u32     tbase4;         /* 0x.224 - TxBD Base Address of ring 4 */
        u8      res10e[4];
        u32     tbase5;         /* 0x.22c - TxBD Base Address of ring 5 */
        u8      res10f[4];
        u32     tbase6;         /* 0x.234 - TxBD Base Address of ring 6 */
        u8      res10g[4];
        u32     tbase7;         /* 0x.23c - TxBD Base Address of ring 7 */
        u8      res10[192];
        u32     rctrl;          /* 0x.300 - Receive Control Register */
        u32     rstat;          /* 0x.304 - Receive Status Register */
        u8      res12[8];
        u32     rxic;           /* 0x.310 - Receive Interrupt Coalescing Configuration Register */
        u32     rqueue;         /* 0x.314 - Receive queue control register */
        u32     rir0;           /* 0x.318 - Ring mapping register 0 */
        u32     rir1;           /* 0x.31c - Ring mapping register 1 */
        u32     rir2;           /* 0x.320 - Ring mapping register 2 */
        u32     rir3;           /* 0x.324 - Ring mapping register 3 */
        u8      res13[8];
        u32     rbifx;          /* 0x.330 - Receive bit field extract control register */
        u32     rqfar;          /* 0x.334 - Receive queue filing table address register */
        u32     rqfcr;          /* 0x.338 - Receive queue filing table control register */
        u32     rqfpr;          /* 0x.33c - Receive queue filing table property register */
        u32     mrblr;          /* 0x.340 - Maximum Receive Buffer Length Register */
        u8      res14[56];
        u32     rbdbph;         /* 0x.37c - Rx data buffer pointer high */
        u8      res15a[4];
        u32     rbptr0;         /* 0x.384 - RxBD pointer for ring 0 */
        u8      res15b[4];
        u32     rbptr1;         /* 0x.38c - RxBD pointer for ring 1 */
        u8      res15c[4];
        u32     rbptr2;         /* 0x.394 - RxBD pointer for ring 2 */
        u8      res15d[4];
        u32     rbptr3;         /* 0x.39c - RxBD pointer for ring 3 */
        u8      res15e[4];
        u32     rbptr4;         /* 0x.3a4 - RxBD pointer for ring 4 */
        u8      res15f[4];
        u32     rbptr5;         /* 0x.3ac - RxBD pointer for ring 5 */
        u8      res15g[4];
        u32     rbptr6;         /* 0x.3b4 - RxBD pointer for ring 6 */
        u8      res15h[4];
        u32     rbptr7;         /* 0x.3bc - RxBD pointer for ring 7 */
        u8      res16[64];
        u32     rbaseh;         /* 0x.400 - RxBD base address high */
        u32     rbase0;         /* 0x.404 - RxBD base address of ring 0 */
        u8      res17a[4];
        u32     rbase1;         /* 0x.40c - RxBD base address of ring 1 */
        u8      res17b[4];
        u32     rbase2;         /* 0x.414 - RxBD base address of ring 2 */
        u8      res17c[4];
        u32     rbase3;         /* 0x.41c - RxBD base address of ring 3 */
        u8      res17d[4];
        u32     rbase4;         /* 0x.424 - RxBD base address of ring 4 */
        u8      res17e[4];
        u32     rbase5;         /* 0x.42c - RxBD base address of ring 5 */
        u8      res17f[4];
        u32     rbase6;         /* 0x.434 - RxBD base address of ring 6 */
        u8      res17g[4];
        u32     rbase7;         /* 0x.43c - RxBD base address of ring 7 */
        u8      res17[192];
        u32     maccfg1;        /* 0x.500 - MAC Configuration 1 Register */
        u32     maccfg2;        /* 0x.504 - MAC Configuration 2 Register */
        u32     ipgifg;         /* 0x.508 - Inter Packet Gap/Inter Frame Gap Register */
        u32     hafdup;         /* 0x.50c - Half Duplex Register */
        u32     maxfrm;         /* 0x.510 - Maximum Frame Length Register */
        u8      res18[12];
        u8      gfar_mii_regs[24];      /* See gianfar_phy.h */
        u32     ifctrl;         /* 0x.538 - Interface control register */
        u32     ifstat;         /* 0x.53c - Interface Status Register */
        u32     macstnaddr1;    /* 0x.540 - Station Address Part 1 Register */
        u32     macstnaddr2;    /* 0x.544 - Station Address Part 2 Register */
        u32     mac01addr1;     /* 0x.548 - MAC exact match address 1, part 1 */
        u32     mac01addr2;     /* 0x.54c - MAC exact match address 1, part 2 */
        u32     mac02addr1;     /* 0x.550 - MAC exact match address 2, part 1 */
        u32     mac02addr2;     /* 0x.554 - MAC exact match address 2, part 2 */
        u32     mac03addr1;     /* 0x.558 - MAC exact match address 3, part 1 */
        u32     mac03addr2;     /* 0x.55c - MAC exact match address 3, part 2 */
        u32     mac04addr1;     /* 0x.560 - MAC exact match address 4, part 1 */
        u32     mac04addr2;     /* 0x.564 - MAC exact match address 4, part 2 */
        u32     mac05addr1;     /* 0x.568 - MAC exact match address 5, part 1 */
        u32     mac05addr2;     /* 0x.56c - MAC exact match address 5, part 2 */
        u32     mac06addr1;     /* 0x.570 - MAC exact match address 6, part 1 */
        u32     mac06addr2;     /* 0x.574 - MAC exact match address 6, part 2 */
        u32     mac07addr1;     /* 0x.578 - MAC exact match address 7, part 1 */
        u32     mac07addr2;     /* 0x.57c - MAC exact match address 7, part 2 */
        u32     mac08addr1;     /* 0x.580 - MAC exact match address 8, part 1 */
        u32     mac08addr2;     /* 0x.584 - MAC exact match address 8, part 2 */
        u32     mac09addr1;     /* 0x.588 - MAC exact match address 9, part 1 */
        u32     mac09addr2;     /* 0x.58c - MAC exact match address 9, part 2 */
        u32     mac10addr1;     /* 0x.590 - MAC exact match address 10, part 1*/
        u32     mac10addr2;     /* 0x.594 - MAC exact match address 10, part 2*/
        u32     mac11addr1;     /* 0x.598 - MAC exact match address 11, part 1*/
        u32     mac11addr2;     /* 0x.59c - MAC exact match address 11, part 2*/
        u32     mac12addr1;     /* 0x.5a0 - MAC exact match address 12, part 1*/
        u32     mac12addr2;     /* 0x.5a4 - MAC exact match address 12, part 2*/
        u32     mac13addr1;     /* 0x.5a8 - MAC exact match address 13, part 1*/
        u32     mac13addr2;     /* 0x.5ac - MAC exact match address 13, part 2*/
        u32     mac14addr1;     /* 0x.5b0 - MAC exact match address 14, part 1*/
        u32     mac14addr2;     /* 0x.5b4 - MAC exact match address 14, part 2*/
        u32     mac15addr1;     /* 0x.5b8 - MAC exact match address 15, part 1*/
        u32     mac15addr2;     /* 0x.5bc - MAC exact match address 15, part 2*/
        u8      res20[192];
        struct rmon_mib rmon;   /* 0x.680-0x.73c */
        u32     rrej;           /* 0x.740 - Receive filer rejected packet counter */
        u8      res21[188];
        u32     igaddr0;        /* 0x.800 - Indivdual/Group address register 0*/
        u32     igaddr1;        /* 0x.804 - Indivdual/Group address register 1*/
        u32     igaddr2;        /* 0x.808 - Indivdual/Group address register 2*/
        u32     igaddr3;        /* 0x.80c - Indivdual/Group address register 3*/
        u32     igaddr4;        /* 0x.810 - Indivdual/Group address register 4*/
        u32     igaddr5;        /* 0x.814 - Indivdual/Group address register 5*/
        u32     igaddr6;        /* 0x.818 - Indivdual/Group address register 6*/
        u32     igaddr7;        /* 0x.81c - Indivdual/Group address register 7*/
        u8      res22[96];
        u32     gaddr0;         /* 0x.880 - Group address register 0 */
        u32     gaddr1;         /* 0x.884 - Group address register 1 */
        u32     gaddr2;         /* 0x.888 - Group address register 2 */
        u32     gaddr3;         /* 0x.88c - Group address register 3 */
        u32     gaddr4;         /* 0x.890 - Group address register 4 */
        u32     gaddr5;         /* 0x.894 - Group address register 5 */
        u32     gaddr6;         /* 0x.898 - Group address register 6 */
        u32     gaddr7;         /* 0x.89c - Group address register 7 */
        u8      res23a[352];
        u32     fifocfg;        /* 0x.a00 - FIFO interface config register */
        u8      res23b[252];
        u8      res23c[248];
        u32     attr;           /* 0x.bf8 - Attributes Register */
        u32     attreli;        /* 0x.bfc - Attributes Extract Length and Extract Index Register */
        u8      res24[688];
        u32     isrg0;          /* 0x.eb0 - Interrupt steering group 0 register */
        u32     isrg1;          /* 0x.eb4 - Interrupt steering group 1 register */
        u32     isrg2;          /* 0x.eb8 - Interrupt steering group 2 register */
        u32     isrg3;          /* 0x.ebc - Interrupt steering group 3 register */
        u8      res25[16];
        u32     rxic0;          /* 0x.ed0 - Ring 0 Rx interrupt coalescing */
        u32     rxic1;          /* 0x.ed4 - Ring 1 Rx interrupt coalescing */
        u32     rxic2;          /* 0x.ed8 - Ring 2 Rx interrupt coalescing */
        u32     rxic3;          /* 0x.edc - Ring 3 Rx interrupt coalescing */
        u32     rxic4;          /* 0x.ee0 - Ring 4 Rx interrupt coalescing */
        u32     rxic5;          /* 0x.ee4 - Ring 5 Rx interrupt coalescing */
        u32     rxic6;          /* 0x.ee8 - Ring 6 Rx interrupt coalescing */
        u32     rxic7;          /* 0x.eec - Ring 7 Rx interrupt coalescing */
        u8      res26[32];
        u32     txic0;          /* 0x.f10 - Ring 0 Tx interrupt coalescing */
        u32     txic1;          /* 0x.f14 - Ring 1 Tx interrupt coalescing */
        u32     txic2;          /* 0x.f18 - Ring 2 Tx interrupt coalescing */
        u32     txic3;          /* 0x.f1c - Ring 3 Tx interrupt coalescing */
        u32     txic4;          /* 0x.f20 - Ring 4 Tx interrupt coalescing */
        u32     txic5;          /* 0x.f24 - Ring 5 Tx interrupt coalescing */
        u32     txic6;          /* 0x.f28 - Ring 6 Tx interrupt coalescing */
        u32     txic7;          /* 0x.f2c - Ring 7 Tx interrupt coalescing */
        u8      res27[208];
};

/* Flags related to gianfar device features */
#define FSL_GIANFAR_DEV_HAS_GIGABIT             0x00000001
#define FSL_GIANFAR_DEV_HAS_COALESCE            0x00000002
#define FSL_GIANFAR_DEV_HAS_RMON                0x00000004
#define FSL_GIANFAR_DEV_HAS_MULTI_INTR          0x00000008
#define FSL_GIANFAR_DEV_HAS_CSUM                0x00000010
#define FSL_GIANFAR_DEV_HAS_VLAN                0x00000020
#define FSL_GIANFAR_DEV_HAS_EXTENDED_HASH       0x00000040
#define FSL_GIANFAR_DEV_HAS_PADDING             0x00000080
#define FSL_GIANFAR_DEV_HAS_MAGIC_PACKET        0x00000100
#define FSL_GIANFAR_DEV_HAS_BD_STASHING         0x00000200
#define FSL_GIANFAR_DEV_HAS_BUF_STASHING        0x00000400

#if (MAXGROUPS == 2)
#define DEFAULT_MAPPING         0xAA
#else
#define DEFAULT_MAPPING         0xFF
#endif

#define ISRG_SHIFT_TX   0x10
#define ISRG_SHIFT_RX   0x18

/* The same driver can operate in two modes */
/* SQ_SG_MODE: Single Queue Single Group Mode
 *              (Backward compatible mode)
 * MQ_MG_MODE: Multi Queue Multi Group mode
 */
enum {
        SQ_SG_MODE = 0,
        MQ_MG_MODE
};

/**
 *      struct gfar_priv_tx_q - per tx queue structure
 *      @txlock: per queue tx spin lock
 *      @tx_skbuff:skb pointers
 *      @skb_curtx: to be used skb pointer
 *      @skb_dirtytx:the last used skb pointer
 *      @qindex: index of this queue
 *      @dev: back pointer to the dev structure
 *      @grp: back pointer to the group to which this queue belongs
 *      @tx_bd_base: First tx buffer descriptor
 *      @cur_tx: Next free ring entry
 *      @dirty_tx: First buffer in line to be transmitted
 *      @tx_ring_size: Tx ring size
 *      @num_txbdfree: number of free TxBds
 *      @txcoalescing: enable/disable tx coalescing
 *      @txic: transmit interrupt coalescing value
 *      @txcount: coalescing value if based on tx frame count
 *      @txtime: coalescing value if based on time
 */
struct gfar_priv_tx_q {
        spinlock_t txlock __attribute__ ((aligned (SMP_CACHE_BYTES)));
        struct sk_buff ** tx_skbuff;
        /* Buffer descriptor pointers */
        dma_addr_t tx_bd_dma_base;
        struct  txbd8 *tx_bd_base;
        struct  txbd8 *cur_tx;
        struct  txbd8 *dirty_tx;
        struct  net_device *dev;
        struct gfar_priv_grp *grp;
        u16     skb_curtx;
        u16     skb_dirtytx;
        u16     qindex;
        unsigned int tx_ring_size;
        unsigned int num_txbdfree;
        /* Configuration info for the coalescing features */
        unsigned char txcoalescing;
        unsigned long txic;
        unsigned short txcount;
        unsigned short txtime;
};

/**
 *      struct gfar_priv_rx_q - per rx queue structure
 *      @rxlock: per queue rx spin lock
 *      @rx_skbuff: skb pointers
 *      @skb_currx: currently use skb pointer
 *      @rx_bd_base: First rx buffer descriptor
 *      @cur_rx: Next free rx ring entry
 *      @qindex: index of this queue
 *      @dev: back pointer to the dev structure
 *      @rx_ring_size: Rx ring size
 *      @rxcoalescing: enable/disable rx-coalescing
 *      @rxic: receive interrupt coalescing vlaue
 */

struct gfar_priv_rx_q {
        spinlock_t rxlock __attribute__ ((aligned (SMP_CACHE_BYTES)));
        struct  sk_buff ** rx_skbuff;
        dma_addr_t rx_bd_dma_base;
        struct  rxbd8 *rx_bd_base;
        struct  rxbd8 *cur_rx;
        struct  net_device *dev;
        struct gfar_priv_grp *grp;
        u16     skb_currx;
        u16     qindex;
        unsigned int    rx_ring_size;
        /* RX Coalescing values */
        unsigned char rxcoalescing;
        unsigned long rxic;
};

/**
 *      struct gfar_priv_grp - per group structure
 *      @napi: the napi poll function
 *      @priv: back pointer to the priv structure
 *      @regs: the ioremapped register space for this group
 *      @grp_id: group id for this group
 *      @interruptTransmit: The TX interrupt number for this group
 *      @interruptReceive: The RX interrupt number for this group
 *      @interruptError: The ERROR interrupt number for this group
 *      @int_name_tx: tx interrupt name for this group
 *      @int_name_rx: rx interrupt name for this group
 *      @int_name_er: er interrupt name for this group
 */

struct gfar_priv_grp {
        spinlock_t grplock __attribute__ ((aligned (SMP_CACHE_BYTES)));
        struct  napi_struct napi;
        struct gfar_private *priv;
        struct gfar __iomem *regs;
        unsigned int grp_id;
        unsigned int rx_bit_map;
        unsigned int tx_bit_map;
        unsigned int num_tx_queues;
        unsigned int num_rx_queues;
        unsigned int rstat;
        unsigned int tstat;
        unsigned int imask;
        unsigned int ievent;
        unsigned int interruptTransmit;
        unsigned int interruptReceive;
        unsigned int interruptError;

        char int_name_tx[GFAR_INT_NAME_MAX];
        char int_name_rx[GFAR_INT_NAME_MAX];
        char int_name_er[GFAR_INT_NAME_MAX];
};

/* Struct stolen almost completely (and shamelessly) from the FCC enet source
 * (Ok, that's not so true anymore, but there is a family resemblence)
 * The GFAR buffer descriptors track the ring buffers.  The rx_bd_base
 * and tx_bd_base always point to the currently available buffer.
 * The dirty_tx tracks the current buffer that is being sent by the
 * controller.  The cur_tx and dirty_tx are equal under both completely
 * empty and completely full conditions.  The empty/ready indicator in
 * the buffer descriptor determines the actual condition.
 */
struct gfar_private {

        /* Indicates how many tx, rx queues are enabled */
        unsigned int num_tx_queues;
        unsigned int num_rx_queues;
        unsigned int num_grps;
        unsigned int mode;

        /* The total tx and rx ring size for the enabled queues */
        unsigned int total_tx_ring_size;
        unsigned int total_rx_ring_size;

        struct device_node *node;
        struct net_device *ndev;
        struct of_device *ofdev;

        struct gfar_priv_grp gfargrp[MAXGROUPS];
        struct gfar_priv_tx_q *tx_queue[MAX_TX_QS];
        struct gfar_priv_rx_q *rx_queue[MAX_RX_QS];

        /* RX per device parameters */
        unsigned int rx_buffer_size;
        unsigned int rx_stash_size;
        unsigned int rx_stash_index;

        struct sk_buff_head rx_recycle;

        struct vlan_group *vlgrp;


        /* Hash registers and their width */
        u32 __iomem *hash_regs[16];
        int hash_width;

        /* global parameters */
        unsigned int fifo_threshold;
        unsigned int fifo_starve;
        unsigned int fifo_starve_off;

        /* Bitfield update lock */
        spinlock_t bflock;

        phy_interface_t interface;
        struct device_node *phy_node;
        struct device_node *tbi_node;
        u32 device_flags;
        unsigned char rx_csum_enable:1,
                extended_hash:1,
                bd_stash_en:1,
                rx_filer_enable:1,
                wol_en:1; /* Wake-on-LAN enabled */
        unsigned short padding;

        /* PHY stuff */
        struct phy_device *phydev;
        struct mii_bus *mii_bus;
        int oldspeed;
        int oldduplex;
        int oldlink;

        uint32_t msg_enable;

        struct work_struct reset_task;

        /* Network Statistics */
        struct gfar_extra_stats extra_stats;
};

static inline u32 gfar_read(volatile unsigned __iomem *addr)
{
        u32 val;
        val = in_be32(addr);
        return val;
}

static inline void gfar_write(volatile unsigned __iomem *addr, u32 val)
{
        out_be32(addr, val);
}

extern void lock_rx_qs(struct gfar_private *priv);
extern void lock_tx_qs(struct gfar_private *priv);
extern void unlock_rx_qs(struct gfar_private *priv);
extern void unlock_tx_qs(struct gfar_private *priv);
extern irqreturn_t gfar_receive(int irq, void *dev_id);
extern int startup_gfar(struct net_device *dev);
extern void stop_gfar(struct net_device *dev);
extern void gfar_halt(struct net_device *dev);
extern void gfar_phy_test(struct mii_bus *bus, struct phy_device *phydev,
                int enable, u32 regnum, u32 read);
extern void gfar_configure_coalescing(struct gfar_private *priv,
                unsigned int tx_mask, unsigned int rx_mask);
void gfar_init_sysfs(struct net_device *dev);

extern const struct ethtool_ops gfar_ethtool_ops;

#endif /* __GIANFAR_H */