/*
 * Network device driver for Cell Processor-Based Blade and Celleb platform
 *
 * (C) Copyright IBM Corp. 2005
 * (C) Copyright 2006 TOSHIBA CORPORATION
 *
 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
 *           Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
 *
 * 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, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef _SPIDER_NET_H
#define _SPIDER_NET_H

#define VERSION "2.0 B"

#include "sungem_phy.h"

extern int spider_net_stop(struct net_device *netdev);
extern int spider_net_open(struct net_device *netdev);

extern const struct ethtool_ops spider_net_ethtool_ops;

extern char spider_net_driver_name[];

#define SPIDER_NET_MAX_FRAME                    2312
#define SPIDER_NET_MAX_MTU                      2294
#define SPIDER_NET_MIN_MTU                      64

#define SPIDER_NET_RXBUF_ALIGN                  128

#define SPIDER_NET_RX_DESCRIPTORS_DEFAULT       256
#define SPIDER_NET_RX_DESCRIPTORS_MIN           16
#define SPIDER_NET_RX_DESCRIPTORS_MAX           512

#define SPIDER_NET_TX_DESCRIPTORS_DEFAULT       256
#define SPIDER_NET_TX_DESCRIPTORS_MIN           16
#define SPIDER_NET_TX_DESCRIPTORS_MAX           512

#define SPIDER_NET_TX_TIMER                     (HZ/5)
#define SPIDER_NET_ANEG_TIMER                   (HZ)
#define SPIDER_NET_ANEG_TIMEOUT                 5

#define SPIDER_NET_RX_CSUM_DEFAULT              1

#define SPIDER_NET_WATCHDOG_TIMEOUT             50*HZ
#define SPIDER_NET_NAPI_WEIGHT                  64

#define SPIDER_NET_FIRMWARE_SEQS        6
#define SPIDER_NET_FIRMWARE_SEQWORDS    1024
#define SPIDER_NET_FIRMWARE_LEN         (SPIDER_NET_FIRMWARE_SEQS * \
                                         SPIDER_NET_FIRMWARE_SEQWORDS * \
                                         sizeof(u32))
#define SPIDER_NET_FIRMWARE_NAME        "spider_fw.bin"

/** spider_net SMMIO registers */
#define SPIDER_NET_GHIINT0STS           0x00000000
#define SPIDER_NET_GHIINT1STS           0x00000004
#define SPIDER_NET_GHIINT2STS           0x00000008
#define SPIDER_NET_GHIINT0MSK           0x00000010
#define SPIDER_NET_GHIINT1MSK           0x00000014
#define SPIDER_NET_GHIINT2MSK           0x00000018

#define SPIDER_NET_GRESUMINTNUM         0x00000020
#define SPIDER_NET_GREINTNUM            0x00000024

#define SPIDER_NET_GFFRMNUM             0x00000028
#define SPIDER_NET_GFAFRMNUM            0x0000002c
#define SPIDER_NET_GFBFRMNUM            0x00000030
#define SPIDER_NET_GFCFRMNUM            0x00000034
#define SPIDER_NET_GFDFRMNUM            0x00000038

/* clear them (don't use it) */
#define SPIDER_NET_GFREECNNUM           0x0000003c
#define SPIDER_NET_GONETIMENUM          0x00000040

#define SPIDER_NET_GTOUTFRMNUM          0x00000044

#define SPIDER_NET_GTXMDSET             0x00000050
#define SPIDER_NET_GPCCTRL              0x00000054
#define SPIDER_NET_GRXMDSET             0x00000058
#define SPIDER_NET_GIPSECINIT           0x0000005c
#define SPIDER_NET_GFTRESTRT            0x00000060
#define SPIDER_NET_GRXDMAEN             0x00000064
#define SPIDER_NET_GMRWOLCTRL           0x00000068
#define SPIDER_NET_GPCWOPCMD            0x0000006c
#define SPIDER_NET_GPCROPCMD            0x00000070
#define SPIDER_NET_GTTFRMCNT            0x00000078
#define SPIDER_NET_GTESTMD              0x0000007c

#define SPIDER_NET_GSINIT               0x00000080
#define SPIDER_NET_GSnPRGADR            0x00000084
#define SPIDER_NET_GSnPRGDAT            0x00000088

#define SPIDER_NET_GMACOPEMD            0x00000100
#define SPIDER_NET_GMACLENLMT           0x00000108
#define SPIDER_NET_GMACST               0x00000110
#define SPIDER_NET_GMACINTEN            0x00000118
#define SPIDER_NET_GMACPHYCTRL          0x00000120

#define SPIDER_NET_GMACAPAUSE           0x00000154
#define SPIDER_NET_GMACTXPAUSE          0x00000164

#define SPIDER_NET_GMACMODE             0x000001b0
#define SPIDER_NET_GMACBSTLMT           0x000001b4

#define SPIDER_NET_GMACUNIMACU          0x000001c0
#define SPIDER_NET_GMACUNIMACL          0x000001c8

#define SPIDER_NET_GMRMHFILnR           0x00000400
#define SPIDER_NET_MULTICAST_HASHES     256

#define SPIDER_NET_GMRUAFILnR           0x00000500
#define SPIDER_NET_GMRUA0FIL15R         0x00000578

#define SPIDER_NET_GTTQMSK              0x00000934

/* RX DMA controller registers, all 0x00000a.. are for DMA controller A,
 * 0x00000b.. for DMA controller B, etc. */
#define SPIDER_NET_GDADCHA              0x00000a00
#define SPIDER_NET_GDADMACCNTR          0x00000a04
#define SPIDER_NET_GDACTDPA             0x00000a08
#define SPIDER_NET_GDACTDCNT            0x00000a0c
#define SPIDER_NET_GDACDBADDR           0x00000a20
#define SPIDER_NET_GDACDBSIZE           0x00000a24
#define SPIDER_NET_GDACNEXTDA           0x00000a28
#define SPIDER_NET_GDACCOMST            0x00000a2c
#define SPIDER_NET_GDAWBCOMST           0x00000a30
#define SPIDER_NET_GDAWBRSIZE           0x00000a34
#define SPIDER_NET_GDAWBVSIZE           0x00000a38
#define SPIDER_NET_GDAWBTRST            0x00000a3c
#define SPIDER_NET_GDAWBTRERR           0x00000a40

/* TX DMA controller registers */
#define SPIDER_NET_GDTDCHA              0x00000e00
#define SPIDER_NET_GDTDMACCNTR          0x00000e04
#define SPIDER_NET_GDTCDPA              0x00000e08
#define SPIDER_NET_GDTDMASEL            0x00000e14

#define SPIDER_NET_ECMODE               0x00000f00
/* clock and reset control register */
#define SPIDER_NET_CKRCTRL              0x00000ff0

/** SCONFIG registers */
#define SPIDER_NET_SCONFIG_IOACTE       0x00002810

/** interrupt mask registers */
#define SPIDER_NET_INT0_MASK_VALUE      0x3f7fe2c7
#define SPIDER_NET_INT1_MASK_VALUE      0x0000fff2
#define SPIDER_NET_INT2_MASK_VALUE      0x000003f1

/* we rely on flagged descriptor interrupts */
#define SPIDER_NET_FRAMENUM_VALUE       0x00000000
/* set this first, then the FRAMENUM_VALUE */
#define SPIDER_NET_GFXFRAMES_VALUE      0x00000000

#define SPIDER_NET_STOP_SEQ_VALUE       0x00000000
#define SPIDER_NET_RUN_SEQ_VALUE        0x0000007e

#define SPIDER_NET_PHY_CTRL_VALUE       0x00040040
/* #define SPIDER_NET_PHY_CTRL_VALUE    0x01070080*/
#define SPIDER_NET_RXMODE_VALUE         0x00000011
/* auto retransmission in case of MAC aborts */
#define SPIDER_NET_TXMODE_VALUE         0x00010000
#define SPIDER_NET_RESTART_VALUE        0x00000000
#define SPIDER_NET_WOL_VALUE            0x00001111
#if 0
#define SPIDER_NET_WOL_VALUE            0x00000000
#endif
#define SPIDER_NET_IPSECINIT_VALUE      0x6f716f71

/* pause frames: automatic, no upper retransmission count */
/* outside loopback mode: ETOMOD signal dont matter, not connected */
/* ETOMOD signal is brought to PHY reset. bit 2 must be 1 in Celleb */
#define SPIDER_NET_OPMODE_VALUE         0x00000067
/*#define SPIDER_NET_OPMODE_VALUE               0x001b0062*/
#define SPIDER_NET_LENLMT_VALUE         0x00000908

#define SPIDER_NET_MACAPAUSE_VALUE      0x00000800 /* about 1 ms */
#define SPIDER_NET_TXPAUSE_VALUE        0x00000000

#define SPIDER_NET_MACMODE_VALUE        0x00000001
#define SPIDER_NET_BURSTLMT_VALUE       0x00000200 /* about 16 us */

/* DMAC control register GDMACCNTR
 *
 * 1(0)                         enable r/tx dma
 *  0000000                             fixed to 0
 *
 *         000000                       fixed to 0
 *               0(1)                   en/disable descr writeback on force end
 *                0(1)                  force end
 *
 *                 000000               fixed to 0
 *                       00             burst alignment: 128 bytes
 *                       11             burst alignment: 1024 bytes
 *
 *                         00000        fixed to 0
 *                              0       descr writeback size 32 bytes
 *                               0(1)   descr chain end interrupt enable
 *                                0(1)  descr status writeback enable */

/* to set RX_DMA_EN */
#define SPIDER_NET_DMA_RX_VALUE         0x80000000
#define SPIDER_NET_DMA_RX_FEND_VALUE    0x00030003
/* to set TX_DMA_EN */
#define SPIDER_NET_TX_DMA_EN           0x80000000
#define SPIDER_NET_GDTBSTA             0x00000300
#define SPIDER_NET_GDTDCEIDIS          0x00000002
#define SPIDER_NET_DMA_TX_VALUE        SPIDER_NET_TX_DMA_EN | \
                                       SPIDER_NET_GDTDCEIDIS | \
                                       SPIDER_NET_GDTBSTA

#define SPIDER_NET_DMA_TX_FEND_VALUE    0x00030003

/* SPIDER_NET_UA_DESCR_VALUE is OR'ed with the unicast address */
#define SPIDER_NET_UA_DESCR_VALUE       0x00080000
#define SPIDER_NET_PROMISC_VALUE        0x00080000
#define SPIDER_NET_NONPROMISC_VALUE     0x00000000

#define SPIDER_NET_DMASEL_VALUE         0x00000001

#define SPIDER_NET_ECMODE_VALUE         0x00000000

#define SPIDER_NET_CKRCTRL_RUN_VALUE    0x1fff010f
#define SPIDER_NET_CKRCTRL_STOP_VALUE   0x0000010f

#define SPIDER_NET_SBIMSTATE_VALUE      0x00000000
#define SPIDER_NET_SBTMSTATE_VALUE      0x00000000

/* SPIDER_NET_GHIINT0STS bits, in reverse order so that they can be used
 * with 1 << SPIDER_NET_... */
enum spider_net_int0_status {
        SPIDER_NET_GPHYINT = 0,
        SPIDER_NET_GMAC2INT,
        SPIDER_NET_GMAC1INT,
        SPIDER_NET_GIPSINT,
        SPIDER_NET_GFIFOINT,
        SPIDER_NET_GDMACINT,
        SPIDER_NET_GSYSINT,
        SPIDER_NET_GPWOPCMPINT,
        SPIDER_NET_GPROPCMPINT,
        SPIDER_NET_GPWFFINT,
        SPIDER_NET_GRMDADRINT,
        SPIDER_NET_GRMARPINT,
        SPIDER_NET_GRMMPINT,
        SPIDER_NET_GDTDEN0INT,
        SPIDER_NET_GDDDEN0INT,
        SPIDER_NET_GDCDEN0INT,
        SPIDER_NET_GDBDEN0INT,
        SPIDER_NET_GDADEN0INT,
        SPIDER_NET_GDTFDCINT,
        SPIDER_NET_GDDFDCINT,
        SPIDER_NET_GDCFDCINT,
        SPIDER_NET_GDBFDCINT,
        SPIDER_NET_GDAFDCINT,
        SPIDER_NET_GTTEDINT,
        SPIDER_NET_GDTDCEINT,
        SPIDER_NET_GRFDNMINT,
        SPIDER_NET_GRFCNMINT,
        SPIDER_NET_GRFBNMINT,
        SPIDER_NET_GRFANMINT,
        SPIDER_NET_GRFNMINT,
        SPIDER_NET_G1TMCNTINT,
        SPIDER_NET_GFREECNTINT
};
/* GHIINT1STS bits */
enum spider_net_int1_status {
        SPIDER_NET_GTMFLLINT = 0,
        SPIDER_NET_GRMFLLINT,
        SPIDER_NET_GTMSHTINT,
        SPIDER_NET_GDTINVDINT,
        SPIDER_NET_GRFDFLLINT,
        SPIDER_NET_GDDDCEINT,
        SPIDER_NET_GDDINVDINT,
        SPIDER_NET_GRFCFLLINT,
        SPIDER_NET_GDCDCEINT,
        SPIDER_NET_GDCINVDINT,
        SPIDER_NET_GRFBFLLINT,
        SPIDER_NET_GDBDCEINT,
        SPIDER_NET_GDBINVDINT,
        SPIDER_NET_GRFAFLLINT,
        SPIDER_NET_GDADCEINT,
        SPIDER_NET_GDAINVDINT,
        SPIDER_NET_GDTRSERINT,
        SPIDER_NET_GDDRSERINT,
        SPIDER_NET_GDCRSERINT,
        SPIDER_NET_GDBRSERINT,
        SPIDER_NET_GDARSERINT,
        SPIDER_NET_GDSERINT,
        SPIDER_NET_GDTPTERINT,
        SPIDER_NET_GDDPTERINT,
        SPIDER_NET_GDCPTERINT,
        SPIDER_NET_GDBPTERINT,
        SPIDER_NET_GDAPTERINT
};
/* GHIINT2STS bits */
enum spider_net_int2_status {
        SPIDER_NET_GPROPERINT = 0,
        SPIDER_NET_GMCTCRSNGINT,
        SPIDER_NET_GMCTLCOLINT,
        SPIDER_NET_GMCTTMOTINT,
        SPIDER_NET_GMCRCAERINT,
        SPIDER_NET_GMCRCALERINT,
        SPIDER_NET_GMCRALNERINT,
        SPIDER_NET_GMCROVRINT,
        SPIDER_NET_GMCRRNTINT,
        SPIDER_NET_GMCRRXERINT,
        SPIDER_NET_GTITCSERINT,
        SPIDER_NET_GTIFMTERINT,
        SPIDER_NET_GTIPKTRVKINT,
        SPIDER_NET_GTISPINGINT,
        SPIDER_NET_GTISADNGINT,
        SPIDER_NET_GTISPDNGINT,
        SPIDER_NET_GRIFMTERINT,
        SPIDER_NET_GRIPKTRVKINT,
        SPIDER_NET_GRISPINGINT,
        SPIDER_NET_GRISADNGINT,
        SPIDER_NET_GRISPDNGINT
};

#define SPIDER_NET_TXINT        (1 << SPIDER_NET_GDTFDCINT)

/* We rely on flagged descriptor interrupts */
#define SPIDER_NET_RXINT        ( (1 << SPIDER_NET_GDAFDCINT) )

#define SPIDER_NET_LINKINT      ( 1 << SPIDER_NET_GMAC2INT )

#define SPIDER_NET_ERRINT       ( 0xffffffff & \
                                  (~SPIDER_NET_TXINT) & \
                                  (~SPIDER_NET_RXINT) & \
                                  (~SPIDER_NET_LINKINT) )

#define SPIDER_NET_GPREXEC                      0x80000000
#define SPIDER_NET_GPRDAT_MASK                  0x0000ffff

#define SPIDER_NET_DMAC_NOINTR_COMPLETE         0x00800000
#define SPIDER_NET_DMAC_TXFRMTL         0x00040000
#define SPIDER_NET_DMAC_TCP                     0x00020000
#define SPIDER_NET_DMAC_UDP                     0x00030000
#define SPIDER_NET_TXDCEST                      0x08000000

#define SPIDER_NET_DESCR_RXFDIS        0x00000001
#define SPIDER_NET_DESCR_RXDCEIS       0x00000002
#define SPIDER_NET_DESCR_RXDEN0IS      0x00000004
#define SPIDER_NET_DESCR_RXINVDIS      0x00000008
#define SPIDER_NET_DESCR_RXRERRIS      0x00000010
#define SPIDER_NET_DESCR_RXFDCIMS      0x00000100
#define SPIDER_NET_DESCR_RXDCEIMS      0x00000200
#define SPIDER_NET_DESCR_RXDEN0IMS     0x00000400
#define SPIDER_NET_DESCR_RXINVDIMS     0x00000800
#define SPIDER_NET_DESCR_RXRERRMIS     0x00001000
#define SPIDER_NET_DESCR_UNUSED        0x077fe0e0

#define SPIDER_NET_DESCR_IND_PROC_MASK          0xF0000000
#define SPIDER_NET_DESCR_COMPLETE               0x00000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_RESPONSE_ERROR         0x10000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_PROTECTION_ERROR       0x20000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_FRAME_END              0x40000000 /* used in rx */
#define SPIDER_NET_DESCR_FORCE_END              0x50000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_CARDOWNED              0xA0000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_NOT_IN_USE             0xF0000000
#define SPIDER_NET_DESCR_TXDESFLG               0x00800000

#define SPIDER_NET_DESCR_BAD_STATUS   (SPIDER_NET_DESCR_RXDEN0IS | \
                                       SPIDER_NET_DESCR_RXRERRIS | \
                                       SPIDER_NET_DESCR_RXDEN0IMS | \
                                       SPIDER_NET_DESCR_RXINVDIMS | \
                                       SPIDER_NET_DESCR_RXRERRMIS | \
                                       SPIDER_NET_DESCR_UNUSED)

/* Descriptor, as defined by the hardware */
struct spider_net_hw_descr {
        u32 buf_addr;
        u32 buf_size;
        u32 next_descr_addr;
        u32 dmac_cmd_status;
        u32 result_size;
        u32 valid_size; /* all zeroes for tx */
        u32 data_status;
        u32 data_error; /* all zeroes for tx */
} __attribute__((aligned(32)));

struct spider_net_descr {
        struct spider_net_hw_descr *hwdescr;
        struct sk_buff *skb;
        u32 bus_addr;
        struct spider_net_descr *next;
        struct spider_net_descr *prev;
};

struct spider_net_descr_chain {
        spinlock_t lock;
        struct spider_net_descr *head;
        struct spider_net_descr *tail;
        struct spider_net_descr *ring;
        int num_desc;
        struct spider_net_hw_descr *hwring;
        dma_addr_t dma_addr;
};

/* descriptor data_status bits */
#define SPIDER_NET_RX_IPCHK             29
#define SPIDER_NET_RX_TCPCHK            28
#define SPIDER_NET_VLAN_PACKET          21
#define SPIDER_NET_DATA_STATUS_CKSUM_MASK ( (1 << SPIDER_NET_RX_IPCHK) | \
                                          (1 << SPIDER_NET_RX_TCPCHK) )

/* descriptor data_error bits */
#define SPIDER_NET_RX_IPCHKERR          27
#define SPIDER_NET_RX_RXTCPCHKERR       28

#define SPIDER_NET_DATA_ERR_CKSUM_MASK  (1 << SPIDER_NET_RX_IPCHKERR)

/* the cases we don't pass the packet to the stack.
 * 701b8000 would be correct, but every packets gets that flag */
#define SPIDER_NET_DESTROY_RX_FLAGS     0x700b8000

/* this will be bigger some time */
struct spider_net_options {
        int rx_csum; /* for rx: if 0 ip_summed=NONE,
                        if 1 and hw has verified, ip_summed=UNNECESSARY */
};

#define SPIDER_NET_DEFAULT_MSG          ( NETIF_MSG_DRV | \
                                          NETIF_MSG_PROBE | \
                                          NETIF_MSG_LINK | \
                                          NETIF_MSG_TIMER | \
                                          NETIF_MSG_IFDOWN | \
                                          NETIF_MSG_IFUP | \
                                          NETIF_MSG_RX_ERR | \
                                          NETIF_MSG_TX_ERR | \
                                          NETIF_MSG_TX_QUEUED | \
                                          NETIF_MSG_INTR | \
                                          NETIF_MSG_TX_DONE | \
                                          NETIF_MSG_RX_STATUS | \
                                          NETIF_MSG_PKTDATA | \
                                          NETIF_MSG_HW | \
                                          NETIF_MSG_WOL )

struct spider_net_extra_stats {
        unsigned long rx_desc_error;
        unsigned long tx_timeouts;
        unsigned long alloc_rx_skb_error;
        unsigned long rx_iommu_map_error;
        unsigned long tx_iommu_map_error;
        unsigned long rx_desc_unk_state;
};

struct spider_net_card {
        struct net_device *netdev;
        struct pci_dev *pdev;
        struct mii_phy phy;

        struct napi_struct napi;

        int medium;

        void __iomem *regs;

        struct spider_net_descr_chain tx_chain;
        struct spider_net_descr_chain rx_chain;
        struct spider_net_descr *low_watermark;

        int aneg_count;
        struct timer_list aneg_timer;
        struct timer_list tx_timer;
        struct work_struct tx_timeout_task;
        atomic_t tx_timeout_task_counter;
        wait_queue_head_t waitq;
        int num_rx_ints;
        int ignore_rx_ramfull;

        /* for ethtool */
        int msg_enable;
        struct spider_net_extra_stats spider_stats;
        struct spider_net_options options;

        /* Must be last item in struct */
        struct spider_net_descr darray[0];
};

#endif