drivers/net/ethernet/freescale/gianfar.h

root/drivers/net/ethernet/freescale/gianfar.h
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * drivers/net/ethernet/freescale/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, 2011-2013 Freescale Semiconductor, Inc.
 *
 *  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/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 <linux/uaccess.h>
#include <linux/module.h>
#include <linux/crc32.h>
#include <linux/workqueue.h>
#include <linux/ethtool.h>

struct ethtool_flow_spec_container {
        struct ethtool_rx_flow_spec fs;
        struct list_head list;
};

struct ethtool_rx_list {
        struct list_head list;
        unsigned int count;
};

/* Length for FCB */
#define GMAC_FCB_LEN 8

/* Length for TxPAL */
#define GMAC_TXPAL_LEN 16

/* Default padding amount */
#define DEFAULT_PADDING 2

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

#define DRV_NAME "gfar-enet"

/* 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_BUFF_ALLOC      16

#define GFAR_RX_MAX_RING_SIZE   256
#define GFAR_TX_MAX_RING_SIZE   256

#define FBTHR_SHIFT        24
#define DEFAULT_RX_LFC_THR  16
#define DEFAULT_LFC_PTVVAL  4

#define GFAR_RXB_TRUESIZE 2048
#define GFAR_SKBFRAG_OVR (RXBUF_ALIGNMENT \
                          + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
#define GFAR_RXB_SIZE rounddown(GFAR_RXB_TRUESIZE - GFAR_SKBFRAG_OVR, 64)
#define GFAR_SKBFRAG_SIZE (GFAR_RXB_SIZE + GFAR_SKBFRAG_OVR)

#define TX_RING_MOD_MASK(size) (size-1)
#define RX_RING_MOD_MASK(size) (size-1)
#define GFAR_JUMBO_FRAME_SIZE 9600

#define DEFAULT_FIFO_TX_THR 0x100
#define DEFAULT_FIFO_TX_STARVE 0x40
#define DEFAULT_FIFO_TX_STARVE_OFF 0x80

/* 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

/* 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_FIFM             0x00008000
#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 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 RCTRL_TS_ENABLE         0x01000000
#define RCTRL_PAL_MASK          0x001f0000
#define RCTRL_LFC               0x00004000
#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_PRSFM             0x00000020
#define RCTRL_PROM              0x00000008
#define RCTRL_EMEN              0x00000002
#define RCTRL_REQ_PARSER        (RCTRL_VLEX | RCTRL_IPCSEN | \
                                 RCTRL_TUCSEN | RCTRL_FILREN)
#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 RSTAT_CLEAR_RXF0        0x00000080
#define RSTAT_RXF_MASK          0x000000ff

#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
/* priority scheduling */
#define TCTRL_TXSCHED_PRIO      0x00000002
/* weighted round-robin scheduling (WRRS) */
#define TCTRL_TXSCHED_WRRS      0x00000004
/* default WRRS weight and policy setting,
 * tailored to the tr03wt and tr47wt registers:
 * equal weight for all Tx Qs, measured in 64byte units
 */
#define DEFAULT_WRRS_WEIGHT     0x18181818

#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_FGPI             0x00000010
#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_GTSC              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_GRSC              0x00000100
#define IMASK_RXFEN0            0x00000080
#define IMASK_FGPI              0x00000010
#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_RX_DEFAULT (IMASK_RXFEN0 | IMASK_BSY)
#define IMASK_TX_DEFAULT (IMASK_TXFEN | IMASK_TXBEN)

#define IMASK_RX_DISABLED ((~(IMASK_RX_DEFAULT)) & IMASK_DEFAULT)
#define IMASK_TX_DISABLED ((~(IMASK_TX_DEFAULT)) & IMASK_DEFAULT)

/* 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

#define FPR_FILER_MASK  0xFFFFFFFF
#define MAX_FILER_IDX   0xFF

/* This default RIR value directly corresponds
 * to the 3-bit hash value generated */
#define DEFAULT_8RXQ_RIR0       0x05397700
/* Map even hash values to Q0, and odd ones to Q1 */
#define DEFAULT_2RXQ_RIR0       0x04104100

/* RQFCR register bits */
#define RQFCR_GPI               0x80000000
#define RQFCR_HASHTBL_Q         0x00000000
#define RQFCR_HASHTBL_0         0x00020000
#define RQFCR_HASHTBL_1         0x00040000
#define RQFCR_HASHTBL_2         0x00060000
#define RQFCR_HASHTBL_3         0x00080000
#define RQFCR_HASH              0x00010000
#define RQFCR_QUEUE             0x0000FC00
#define RQFCR_CLE               0x00000200
#define RQFCR_RJE               0x00000100
#define RQFCR_AND               0x00000080
#define RQFCR_CMP_EXACT         0x00000000
#define RQFCR_CMP_MATCH         0x00000020
#define RQFCR_CMP_NOEXACT       0x00000040
#define RQFCR_CMP_NOMATCH       0x00000060

/* RQFCR PID values */
#define RQFCR_PID_MASK          0x00000000
#define RQFCR_PID_PARSE         0x00000001
#define RQFCR_PID_ARB           0x00000002
#define RQFCR_PID_DAH           0x00000003
#define RQFCR_PID_DAL           0x00000004
#define RQFCR_PID_SAH           0x00000005
#define RQFCR_PID_SAL           0x00000006
#define RQFCR_PID_ETY           0x00000007
#define RQFCR_PID_VID           0x00000008
#define RQFCR_PID_PRI           0x00000009
#define RQFCR_PID_TOS           0x0000000A
#define RQFCR_PID_L4P           0x0000000B
#define RQFCR_PID_DIA           0x0000000C
#define RQFCR_PID_SIA           0x0000000D
#define RQFCR_PID_DPT           0x0000000E
#define RQFCR_PID_SPT           0x0000000F

/* RQFPR when PID is 0x0001 */
#define RQFPR_HDR_GE_512        0x00200000
#define RQFPR_LERR              0x00100000
#define RQFPR_RAR               0x00080000
#define RQFPR_RARQ              0x00040000
#define RQFPR_AR                0x00020000
#define RQFPR_ARQ               0x00010000
#define RQFPR_EBC               0x00008000
#define RQFPR_VLN               0x00004000
#define RQFPR_CFI               0x00002000
#define RQFPR_JUM               0x00001000
#define RQFPR_IPF               0x00000800
#define RQFPR_FIF               0x00000400
#define RQFPR_IPV4              0x00000200
#define RQFPR_IPV6              0x00000100
#define RQFPR_ICC               0x00000080
#define RQFPR_ICV               0x00000040
#define RQFPR_TCP               0x00000020
#define RQFPR_UDP               0x00000010
#define RQFPR_TUC               0x00000008
#define RQFPR_TUV               0x00000004
#define RQFPR_PER               0x00000002
#define RQFPR_EER               0x00000001

/* CAR1 bits */
#define CAR1_C164               0x80000000
#define CAR1_C1127              0x40000000
#define CAR1_C1255              0x20000000
#define CAR1_C1511              0x10000000
#define CAR1_C11K               0x08000000
#define CAR1_C1MAX              0x04000000
#define CAR1_C1MGV              0x02000000
#define CAR1_C1REJ              0x00020000
#define CAR1_C1RBY              0x00010000
#define CAR1_C1RPK              0x00008000
#define CAR1_C1RFC              0x00004000
#define CAR1_C1RMC              0x00002000
#define CAR1_C1RBC              0x00001000
#define CAR1_C1RXC              0x00000800
#define CAR1_C1RXP              0x00000400
#define CAR1_C1RXU              0x00000200
#define CAR1_C1RAL              0x00000100
#define CAR1_C1RFL              0x00000080
#define CAR1_C1RCD              0x00000040
#define CAR1_C1RCS              0x00000020
#define CAR1_C1RUN              0x00000010
#define CAR1_C1ROV              0x00000008
#define CAR1_C1RFR              0x00000004
#define CAR1_C1RJB              0x00000002
#define CAR1_C1RDR              0x00000001

/* CAM1 bits */
#define CAM1_M164               0x80000000
#define CAM1_M1127              0x40000000
#define CAM1_M1255              0x20000000
#define CAM1_M1511              0x10000000
#define CAM1_M11K               0x08000000
#define CAM1_M1MAX              0x04000000
#define CAM1_M1MGV              0x02000000
#define CAM1_M1REJ              0x00020000
#define CAM1_M1RBY              0x00010000
#define CAM1_M1RPK              0x00008000
#define CAM1_M1RFC              0x00004000
#define CAM1_M1RMC              0x00002000
#define CAM1_M1RBC              0x00001000
#define CAM1_M1RXC              0x00000800
#define CAM1_M1RXP              0x00000400
#define CAM1_M1RXU              0x00000200
#define CAM1_M1RAL              0x00000100
#define CAM1_M1RFL              0x00000080
#define CAM1_M1RCD              0x00000040
#define CAM1_M1RCS              0x00000020
#define CAM1_M1RUN              0x00000010
#define CAM1_M1ROV              0x00000008
#define CAM1_M1RFR              0x00000004
#define CAM1_M1RJB              0x00000002
#define CAM1_M1RDR              0x00000001

/* 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 + 6)  /* '_g#_xx' */

#define GFAR_WOL_MAGIC          0x00000001
#define GFAR_WOL_FILER_UCAST    0x00000002

struct txbd8
{
        union {
                struct {
                        __be16  status; /* Status Fields */
                        __be16  length; /* Buffer length */
                };
                __be32 lstatus;
        };
        __be32  bufPtr; /* Buffer Pointer */
};

struct txfcb {
        u8      flags;
        u8      ptp;    /* Flag to enable tx timestamping */
        u8      l4os;   /* Level 4 Header Offset */
        u8      l3os;   /* Level 3 Header Offset */
        __be16  phcs;   /* Pseudo-header Checksum */
        __be16  vlctl;  /* VLAN control word */
};

struct rxbd8
{
        union {
                struct {
                        __be16  status; /* Status Fields */
                        __be16  length; /* Buffer Length */
                };
                __be32 lstatus;
        };
        __be32  bufPtr; /* Buffer Pointer */
};

struct rxfcb {
        __be16  flags;
        u8      rq;     /* Receive Queue index */
        u8      pro;    /* Layer 4 Protocol */
        u16     reserved;
        __be16  vlctl;  /* VLAN control word */
};

struct gianfar_skb_cb {
        unsigned int bytes_sent; /* bytes-on-wire (i.e. no FCB) */
};

#define GFAR_CB(skb) ((struct gianfar_skb_cb *)((skb)->cb))

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 rmon_overflow {
        /* lock for synchronization of the rdrp field of this struct, and
         * CAR1/CAR2 registers
         */
        spinlock_t lock;
        u32     imask;
        u64     rdrp;
};

struct gfar_extra_stats {
        atomic64_t rx_alloc_err;
        atomic64_t rx_large;
        atomic64_t rx_short;
        atomic64_t rx_nonoctet;
        atomic64_t rx_crcerr;
        atomic64_t rx_overrun;
        atomic64_t rx_bsy;
        atomic64_t rx_babr;
        atomic64_t rx_trunc;
        atomic64_t eberr;
        atomic64_t tx_babt;
        atomic64_t tx_underrun;
        atomic64_t tx_timeout;
};

#define GFAR_RMON_LEN ((sizeof(struct rmon_mib) - 16)/sizeof(u32))
#define GFAR_EXTRA_STATS_LEN \
        (sizeof(struct gfar_extra_stats)/sizeof(atomic64_t))

/* Number of stats exported via ethtool */
#define GFAR_STATS_LEN (GFAR_RMON_LEN + GFAR_EXTRA_STATS_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 */
        u32     rqprm0; /* 0x.c00 - Receive queue parameters register 0 */
        u32     rqprm1; /* 0x.c04 - Receive queue parameters register 1 */
        u32     rqprm2; /* 0x.c08 - Receive queue parameters register 2 */
        u32     rqprm3; /* 0x.c0c - Receive queue parameters register 3 */
        u32     rqprm4; /* 0x.c10 - Receive queue parameters register 4 */
        u32     rqprm5; /* 0x.c14 - Receive queue parameters register 5 */
        u32     rqprm6; /* 0x.c18 - Receive queue parameters register 6 */
        u32     rqprm7; /* 0x.c1c - Receive queue parameters register 7 */
        u8      res24[36];
        u32     rfbptr0; /* 0x.c44 - Last free RxBD pointer for ring 0 */
        u8      res24a[4];
        u32     rfbptr1; /* 0x.c4c - Last free RxBD pointer for ring 1 */
        u8      res24b[4];
        u32     rfbptr2; /* 0x.c54 - Last free RxBD pointer for ring 2 */
        u8      res24c[4];
        u32     rfbptr3; /* 0x.c5c - Last free RxBD pointer for ring 3 */
        u8      res24d[4];
        u32     rfbptr4; /* 0x.c64 - Last free RxBD pointer for ring 4 */
        u8      res24e[4];
        u32     rfbptr5; /* 0x.c6c - Last free RxBD pointer for ring 5 */
        u8      res24f[4];
        u32     rfbptr6; /* 0x.c74 - Last free RxBD pointer for ring 6 */
        u8      res24g[4];
        u32     rfbptr7; /* 0x.c7c - Last free RxBD pointer for ring 7 */
        u8      res24h[4];
        u8      res24x[556];
        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_MAGIC_PACKET        0x00000100
#define FSL_GIANFAR_DEV_HAS_BD_STASHING         0x00000200
#define FSL_GIANFAR_DEV_HAS_BUF_STASHING        0x00000400
#define FSL_GIANFAR_DEV_HAS_TIMER               0x00000800
#define FSL_GIANFAR_DEV_HAS_WAKE_ON_FILER       0x00001000
#define FSL_GIANFAR_DEV_HAS_RX_FILER            0x00002000

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

#define ISRG_RR0        0x80000000
#define ISRG_TR0        0x00800000

/* 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
};

/*
 * Per TX queue stats
 */
struct tx_q_stats {
        u64 tx_packets;
        u64 tx_bytes;
};

/**
 *      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
 *      @stats: bytes/packets stats
 *      @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 {
        /* cacheline 1 */
        spinlock_t txlock __attribute__ ((aligned (SMP_CACHE_BYTES)));
        struct  txbd8 *tx_bd_base;
        struct  txbd8 *cur_tx;
        unsigned int num_txbdfree;
        unsigned short skb_curtx;
        unsigned short tx_ring_size;
        struct tx_q_stats stats;
        struct gfar_priv_grp *grp;
        /* cacheline 2 */
        struct net_device *dev;
        struct sk_buff **tx_skbuff;
        struct  txbd8 *dirty_tx;
        unsigned short skb_dirtytx;
        unsigned short qindex;
        /* Configuration info for the coalescing features */
        unsigned int txcoalescing;
        unsigned long txic;
        dma_addr_t tx_bd_dma_base;
};

/*
 * Per RX queue stats
 */
struct rx_q_stats {
        u64 rx_packets;
        u64 rx_bytes;
        u64 rx_dropped;
};

struct gfar_rx_buff {
        dma_addr_t dma;
        struct page *page;
        unsigned int page_offset;
};

/**
 *      struct gfar_priv_rx_q - per rx queue structure
 *      @rx_buff: Array of buffer info metadata structs
 *      @rx_bd_base: First rx buffer descriptor
 *      @next_to_use: index of the next buffer to be alloc'd
 *      @next_to_clean: index of the next buffer to be cleaned
 *      @qindex: index of this queue
 *      @ndev: back pointer to net_device
 *      @rx_ring_size: Rx ring size
 *      @rxcoalescing: enable/disable rx-coalescing
 *      @rxic: receive interrupt coalescing vlaue
 */

struct gfar_priv_rx_q {
        struct  gfar_rx_buff *rx_buff __aligned(SMP_CACHE_BYTES);
        struct  rxbd8 *rx_bd_base;
        struct  net_device *ndev;
        struct  device *dev;
        u16 rx_ring_size;
        u16 qindex;
        struct  gfar_priv_grp *grp;
        u16 next_to_clean;
        u16 next_to_use;
        u16 next_to_alloc;
        struct  sk_buff *skb;
        struct rx_q_stats stats;
        u32 __iomem *rfbptr;
        unsigned char rxcoalescing;
        unsigned long rxic;
        dma_addr_t rx_bd_dma_base;
};

enum gfar_irqinfo_id {
        GFAR_TX = 0,
        GFAR_RX = 1,
        GFAR_ER = 2,
        GFAR_NUM_IRQS = 3
};

struct gfar_irqinfo {
        unsigned int irq;
        char name[GFAR_INT_NAME_MAX];
};

/**
 *      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
 *      @irqinfo: TX/RX/ER irq data for this group
 */

struct gfar_priv_grp {
        spinlock_t grplock __aligned(SMP_CACHE_BYTES);
        struct  napi_struct napi_rx;
        struct  napi_struct napi_tx;
        struct gfar __iomem *regs;
        struct gfar_priv_tx_q *tx_queue;
        struct gfar_priv_rx_q *rx_queue;
        unsigned int tstat;
        unsigned int rstat;

        struct gfar_private *priv;
        unsigned long num_tx_queues;
        unsigned long tx_bit_map;
        unsigned long num_rx_queues;
        unsigned long rx_bit_map;

        struct gfar_irqinfo *irqinfo[GFAR_NUM_IRQS];
};

#define gfar_irq(grp, ID) \
        ((grp)->irqinfo[GFAR_##ID])

enum gfar_errata {
        GFAR_ERRATA_74          = 0x01,
        GFAR_ERRATA_76          = 0x02,
        GFAR_ERRATA_A002        = 0x04,
        GFAR_ERRATA_12          = 0x08, /* a.k.a errata eTSEC49 */
};

enum gfar_dev_state {
        GFAR_DOWN = 1,
        GFAR_RESETTING
};

/* Struct stolen almost completely (and shamelessly) from the FCC enet source
 * (Ok, that's not so true anymore, but there is a family resemblance)
 * 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 {
        struct device *dev;
        struct net_device *ndev;
        enum gfar_errata errata;

        u16 uses_rxfcb;
        u16 padding;
        u32 device_flags;

        /* HW time stamping enabled flag */
        int hwts_rx_en;
        int hwts_tx_en;

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

        unsigned long state;

        unsigned short mode;
        unsigned int num_tx_queues;
        unsigned int num_rx_queues;
        unsigned int num_grps;
        int tx_actual_en;

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

        /* PHY stuff */
        phy_interface_t interface;
        struct device_node *phy_node;
        struct device_node *tbi_node;
        struct mii_bus *mii_bus;
        int oldspeed;
        int oldduplex;
        int oldlink;

        uint32_t msg_enable;

        struct work_struct reset_task;

        struct platform_device *ofdev;
        unsigned char
                extended_hash:1,
                bd_stash_en:1,
                rx_filer_enable:1,
                /* Enable priorty based Tx scheduling in Hw */
                prio_sched_en:1,
                /* Flow control flags */
                pause_aneg_en:1,
                tx_pause_en:1,
                rx_pause_en:1;

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

        u32 rqueue;
        u32 tqueue;

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

        u32 cur_filer_idx;

        /* RX queue filer rule set*/
        struct ethtool_rx_list rx_list;
        struct mutex rx_queue_access;

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

        /* wake-on-lan settings */
        u16 wol_opts;
        u16 wol_supported;

        /*Filer table*/
        unsigned int ftp_rqfpr[MAX_FILER_IDX + 1];
        unsigned int ftp_rqfcr[MAX_FILER_IDX + 1];
};


static inline int gfar_has_errata(struct gfar_private *priv,
                                  enum gfar_errata err)
{
        return priv->errata & err;
}

static inline u32 gfar_read(unsigned __iomem *addr)
{
        u32 val;
        val = ioread32be(addr);
        return val;
}

static inline void gfar_write(unsigned __iomem *addr, u32 val)
{
        iowrite32be(val, addr);
}

static inline void gfar_write_filer(struct gfar_private *priv,
                unsigned int far, unsigned int fcr, unsigned int fpr)
{
        struct gfar __iomem *regs = priv->gfargrp[0].regs;

        gfar_write(&regs->rqfar, far);
        gfar_write(&regs->rqfcr, fcr);
        gfar_write(&regs->rqfpr, fpr);
}

static inline void gfar_read_filer(struct gfar_private *priv,
                unsigned int far, unsigned int *fcr, unsigned int *fpr)
{
        struct gfar __iomem *regs = priv->gfargrp[0].regs;

        gfar_write(&regs->rqfar, far);
        *fcr = gfar_read(&regs->rqfcr);
        *fpr = gfar_read(&regs->rqfpr);
}

static inline void gfar_write_isrg(struct gfar_private *priv)
{
        struct gfar __iomem *regs = priv->gfargrp[0].regs;
        u32 __iomem *baddr = &regs->isrg0;
        u32 isrg = 0;
        int grp_idx, i;

        for (grp_idx = 0; grp_idx < priv->num_grps; grp_idx++) {
                struct gfar_priv_grp *grp = &priv->gfargrp[grp_idx];

                for_each_set_bit(i, &grp->rx_bit_map, priv->num_rx_queues) {
                        isrg |= (ISRG_RR0 >> i);
                }

                for_each_set_bit(i, &grp->tx_bit_map, priv->num_tx_queues) {
                        isrg |= (ISRG_TR0 >> i);
                }

                gfar_write(baddr, isrg);

                baddr++;
                isrg = 0;
        }
}

static inline int gfar_is_dma_stopped(struct gfar_private *priv)
{
        struct gfar __iomem *regs = priv->gfargrp[0].regs;

        return ((gfar_read(&regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)) ==
               (IEVENT_GRSC | IEVENT_GTSC));
}

static inline int gfar_is_rx_dma_stopped(struct gfar_private *priv)
{
        struct gfar __iomem *regs = priv->gfargrp[0].regs;

        return gfar_read(&regs->ievent) & IEVENT_GRSC;
}

static inline void gfar_wmb(void)
{
#if defined(CONFIG_PPC)
        /* The powerpc-specific eieio() is used, as wmb() has too strong
         * semantics (it requires synchronization between cacheable and
         * uncacheable mappings, which eieio() doesn't provide and which we
         * don't need), thus requiring a more expensive sync instruction.  At
         * some point, the set of architecture-independent barrier functions
         * should be expanded to include weaker barriers.
         */
        eieio();
#else
        wmb(); /* order write acesses for BD (or FCB) fields */
#endif
}

static inline void gfar_clear_txbd_status(struct txbd8 *bdp)
{
        u32 lstatus = be32_to_cpu(bdp->lstatus);

        lstatus &= BD_LFLAG(TXBD_WRAP);
        bdp->lstatus = cpu_to_be32(lstatus);
}

static inline int gfar_rxbd_unused(struct gfar_priv_rx_q *rxq)
{
        if (rxq->next_to_clean > rxq->next_to_use)
                return rxq->next_to_clean - rxq->next_to_use - 1;

        return rxq->rx_ring_size + rxq->next_to_clean - rxq->next_to_use - 1;
}

static inline u32 gfar_rxbd_dma_lastfree(struct gfar_priv_rx_q *rxq)
{
        struct rxbd8 *bdp;
        u32 bdp_dma;
        int i;

        i = rxq->next_to_use ? rxq->next_to_use - 1 : rxq->rx_ring_size - 1;
        bdp = &rxq->rx_bd_base[i];
        bdp_dma = lower_32_bits(rxq->rx_bd_dma_base);
        bdp_dma += (uintptr_t)bdp - (uintptr_t)rxq->rx_bd_base;

        return bdp_dma;
}

int startup_gfar(struct net_device *dev);
void stop_gfar(struct net_device *dev);
void gfar_mac_reset(struct gfar_private *priv);
int gfar_set_features(struct net_device *dev, netdev_features_t features);

extern const struct ethtool_ops gfar_ethtool_ops;

#define MAX_FILER_CACHE_IDX (2*(MAX_FILER_IDX))

#define RQFCR_PID_PRI_MASK 0xFFFFFFF8
#define RQFCR_PID_L4P_MASK 0xFFFFFF00
#define RQFCR_PID_VID_MASK 0xFFFFF000
#define RQFCR_PID_PORT_MASK 0xFFFF0000
#define RQFCR_PID_MAC_MASK 0xFF000000

/* Represents a receive filer table entry */
struct gfar_filer_entry {
        u32 ctrl;
        u32 prop;
};


/* The 20 additional entries are a shadow for one extra element */
struct filer_table {
        u32 index;
        struct gfar_filer_entry fe[MAX_FILER_CACHE_IDX + 20];
};

#endif /* __GIANFAR_H */
Linux
