qeth_core.h

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/*
 *    Copyright IBM Corp. 2007
 *    Author(s): Utz Bacher <[email protected]>,
 *       Frank Pavlic <[email protected]>,
 *       Thomas Spatzier <[email protected]>,
 *       Frank Blaschka <[email protected]>
 */

#ifndef __QETH_CORE_H__
#define __QETH_CORE_H__

#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include <linux/ctype.h>
#include <linux/in6.h>
#include <linux/bitops.h>
#include <linux/seq_file.h>
#include <linux/ethtool.h>

#include <net/ipv6.h>
#include <net/if_inet6.h>
#include <net/addrconf.h>

#include <asm/debug.h>
#include <asm/qdio.h>
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include <asm/sysinfo.h>

#include "qeth_core_mpc.h"

enum qeth_dbf_names {
    QETH_DBF_SETUP,
    QETH_DBF_MSG,
    QETH_DBF_CTRL,
    QETH_DBF_INFOS  /* must be last element */
};

struct qeth_dbf_info {
    char name[DEBUG_MAX_NAME_LEN];
    int pages;
    int areas;
    int len;
    int level;
    struct debug_view *view;
    debug_info_t *id;
};

#define QETH_DBF_CTRL_LEN 256

#define QETH_DBF_TEXT(name, level, text) \
    debug_text_event(qeth_dbf[QETH_DBF_##name].id, level, text)

#define QETH_DBF_HEX(name, level, addr, len) \
    debug_event(qeth_dbf[QETH_DBF_##name].id, level, (void *)(addr), len)

#define QETH_DBF_MESSAGE(level, text...) \
    debug_sprintf_event(qeth_dbf[QETH_DBF_MSG].id, level, text)

#define QETH_DBF_TEXT_(name, level, text...) \
    qeth_dbf_longtext(qeth_dbf[QETH_DBF_##name].id, level, text)

#define QETH_CARD_TEXT(card, level, text) \
    debug_text_event(card->debug, level, text)

#define QETH_CARD_HEX(card, level, addr, len) \
    debug_event(card->debug, level, (void *)(addr), len)

#define QETH_CARD_MESSAGE(card, text...) \
    debug_sprintf_event(card->debug, level, text)

#define QETH_CARD_TEXT_(card, level, text...) \
    qeth_dbf_longtext(card->debug, level, text)

#define SENSE_COMMAND_REJECT_BYTE 0
#define SENSE_COMMAND_REJECT_FLAG 0x80
#define SENSE_RESETTING_EVENT_BYTE 1
#define SENSE_RESETTING_EVENT_FLAG 0x80

/*
 * Common IO related definitions
 */
#define CARD_RDEV(card) card->read.ccwdev
#define CARD_WDEV(card) card->write.ccwdev
#define CARD_DDEV(card) card->data.ccwdev
#define CARD_BUS_ID(card) dev_name(&card->gdev->dev)
#define CARD_RDEV_ID(card) dev_name(&card->read.ccwdev->dev)
#define CARD_WDEV_ID(card) dev_name(&card->write.ccwdev->dev)
#define CARD_DDEV_ID(card) dev_name(&card->data.ccwdev->dev)
#define CHANNEL_ID(channel) dev_name(&channel->ccwdev->dev)

struct qeth_perf_stats {
    unsigned int bufs_rec;
    unsigned int bufs_sent;

    unsigned int skbs_sent_pack;
    unsigned int bufs_sent_pack;

    unsigned int sc_dp_p;
    unsigned int sc_p_dp;
    /* qdio_cq_handler: number of times called, time spent in */
    __u64 cq_start_time;
    unsigned int cq_cnt;
    unsigned int cq_time;
    /* qdio_input_handler: number of times called, time spent in */
    __u64 inbound_start_time;
    unsigned int inbound_cnt;
    unsigned int inbound_time;
    /* qeth_send_packet: number of times called, time spent in */
    __u64 outbound_start_time;
    unsigned int outbound_cnt;
    unsigned int outbound_time;
    /* qdio_output_handler: number of times called, time spent in */
    __u64 outbound_handler_start_time;
    unsigned int outbound_handler_cnt;
    unsigned int outbound_handler_time;
    /* number of calls to and time spent in do_QDIO for inbound queue */
    __u64 inbound_do_qdio_start_time;
    unsigned int inbound_do_qdio_cnt;
    unsigned int inbound_do_qdio_time;
    /* number of calls to and time spent in do_QDIO for outbound queues */
    __u64 outbound_do_qdio_start_time;
    unsigned int outbound_do_qdio_cnt;
    unsigned int outbound_do_qdio_time;
    unsigned int large_send_bytes;
    unsigned int large_send_cnt;
    unsigned int sg_skbs_sent;
    unsigned int sg_frags_sent;
    /* initial values when measuring starts */
    unsigned long initial_rx_packets;
    unsigned long initial_tx_packets;
    /* inbound scatter gather data */
    unsigned int sg_skbs_rx;
    unsigned int sg_frags_rx;
    unsigned int sg_alloc_page_rx;
    unsigned int tx_csum;
    unsigned int tx_lin;
};

/* Routing stuff */
struct qeth_routing_info {
    enum qeth_routing_types type;
};

/* IPA stuff */
struct qeth_ipa_info {
    __u32 supported_funcs;
    __u32 enabled_funcs;
};

static inline int qeth_is_ipa_supported(struct qeth_ipa_info *ipa,
        enum qeth_ipa_funcs func)
{
    return (ipa->supported_funcs & func);
}

static inline int qeth_is_ipa_enabled(struct qeth_ipa_info *ipa,
        enum qeth_ipa_funcs func)
{
    return (ipa->supported_funcs & ipa->enabled_funcs & func);
}

#define qeth_adp_supported(c, f) \
    qeth_is_ipa_supported(&c->options.adp, f)
#define qeth_adp_enabled(c, f) \
    qeth_is_ipa_enabled(&c->options.adp, f)
#define qeth_is_supported(c, f) \
    qeth_is_ipa_supported(&c->options.ipa4, f)
#define qeth_is_enabled(c, f) \
    qeth_is_ipa_enabled(&c->options.ipa4, f)
#define qeth_is_supported6(c, f) \
    qeth_is_ipa_supported(&c->options.ipa6, f)
#define qeth_is_enabled6(c, f) \
    qeth_is_ipa_enabled(&c->options.ipa6, f)
#define qeth_is_ipafunc_supported(c, prot, f) \
     ((prot == QETH_PROT_IPV6) ? \
        qeth_is_supported6(c, f) : qeth_is_supported(c, f))
#define qeth_is_ipafunc_enabled(c, prot, f) \
     ((prot == QETH_PROT_IPV6) ? \
        qeth_is_enabled6(c, f) : qeth_is_enabled(c, f))

#define QETH_IDX_FUNC_LEVEL_OSD      0x0101
#define QETH_IDX_FUNC_LEVEL_IQD      0x4108

#define QETH_MODELLIST_ARRAY \
    {{0x1731, 0x01, 0x1732, QETH_CARD_TYPE_OSD, QETH_MAX_QUEUES, 0}, \
     {0x1731, 0x05, 0x1732, QETH_CARD_TYPE_IQD, QETH_MAX_QUEUES, 0x103}, \
     {0x1731, 0x06, 0x1732, QETH_CARD_TYPE_OSN, QETH_MAX_QUEUES, 0}, \
     {0x1731, 0x02, 0x1732, QETH_CARD_TYPE_OSM, QETH_MAX_QUEUES, 0}, \
     {0x1731, 0x02, 0x1732, QETH_CARD_TYPE_OSX, QETH_MAX_QUEUES, 0}, \
     {0, 0, 0, 0, 0, 0} }
#define QETH_CU_TYPE_IND    0
#define QETH_CU_MODEL_IND   1
#define QETH_DEV_TYPE_IND   2
#define QETH_DEV_MODEL_IND  3
#define QETH_QUEUE_NO_IND   4
#define QETH_MULTICAST_IND  5

#define QETH_REAL_CARD      1
#define QETH_VLAN_CARD      2
#define QETH_BUFSIZE        4096

#define QETH_TX_TIMEOUT     100 * HZ
#define QETH_RCD_TIMEOUT    60 * HZ
#define QETH_RECLAIM_WORK_TIME  HZ
#define QETH_HEADER_SIZE    32
#define QETH_MAX_PORTNO     15

/*IPv6 address autoconfiguration stuff*/
#define UNIQUE_ID_IF_CREATE_ADDR_FAILED 0xfffe
#define UNIQUE_ID_NOT_BY_CARD       0x10000

/*****************************************************************************/
/* QDIO queue and buffer handling                                            */
/*****************************************************************************/
#define QETH_MAX_QUEUES 4
#define QETH_IN_BUF_SIZE_DEFAULT 65536
#define QETH_IN_BUF_COUNT_DEFAULT 64
#define QETH_IN_BUF_COUNT_HSDEFAULT 128
#define QETH_IN_BUF_COUNT_MIN 8
#define QETH_IN_BUF_COUNT_MAX 128
#define QETH_MAX_BUFFER_ELEMENTS(card) ((card)->qdio.in_buf_size >> 12)
#define QETH_IN_BUF_REQUEUE_THRESHOLD(card) \
         ((card)->qdio.in_buf_pool.buf_count / 2)

/* buffers we have to be behind before we get a PCI */
#define QETH_PCI_THRESHOLD_A(card) ((card)->qdio.in_buf_pool.buf_count+1)
/*enqueued free buffers left before we get a PCI*/
#define QETH_PCI_THRESHOLD_B(card) 0
/*not used unless the microcode gets patched*/
#define QETH_PCI_TIMER_VALUE(card) 3

/* priority queing */
#define QETH_PRIOQ_DEFAULT QETH_NO_PRIO_QUEUEING
#define QETH_DEFAULT_QUEUE    2
#define QETH_NO_PRIO_QUEUEING 0
#define QETH_PRIO_Q_ING_PREC  1
#define QETH_PRIO_Q_ING_TOS   2
#define IP_TOS_LOWDELAY 0x10
#define IP_TOS_HIGHTHROUGHPUT 0x08
#define IP_TOS_HIGHRELIABILITY 0x04
#define IP_TOS_NOTIMPORTANT 0x02

/* Packing */
#define QETH_LOW_WATERMARK_PACK  2
#define QETH_HIGH_WATERMARK_PACK 5
#define QETH_WATERMARK_PACK_FUZZ 1

#define QETH_IP_HEADER_SIZE 40

/* large receive scatter gather copy break */
#define QETH_RX_SG_CB (PAGE_SIZE >> 1)
#define QETH_RX_PULL_LEN 256

struct qeth_hdr_layer3 {
    __u8  id;
    __u8  flags;
    __u16 inbound_checksum; /*TSO:__u16 seqno */
    __u32 token;        /*TSO: __u32 reserved */
    __u16 length;
    __u8  vlan_prio;
    __u8  ext_flags;
    __u16 vlan_id;
    __u16 frame_offset;
    __u8  dest_addr[16];
} __attribute__ ((packed));

struct qeth_hdr_layer2 {
    __u8 id;
    __u8 flags[3];
    __u8 port_no;
    __u8 hdr_length;
    __u16 pkt_length;
    __u16 seq_no;
    __u16 vlan_id;
    __u32 reserved;
    __u8 reserved2[16];
} __attribute__ ((packed));

struct qeth_hdr_osn {
    __u8 id;
    __u8 reserved;
    __u16 seq_no;
    __u16 reserved2;
    __u16 control_flags;
    __u16 pdu_length;
    __u8 reserved3[18];
    __u32 ccid;
} __attribute__ ((packed));

struct qeth_hdr {
    union {
        struct qeth_hdr_layer2 l2;
        struct qeth_hdr_layer3 l3;
        struct qeth_hdr_osn    osn;
    } hdr;
} __attribute__ ((packed));

/*TCP Segmentation Offload header*/
struct qeth_hdr_ext_tso {
    __u16 hdr_tot_len;
    __u8  imb_hdr_no;
    __u8  reserved;
    __u8  hdr_type;
    __u8  hdr_version;
    __u16 hdr_len;
    __u32 payload_len;
    __u16 mss;
    __u16 dg_hdr_len;
    __u8  padding[16];
} __attribute__ ((packed));

struct qeth_hdr_tso {
    struct qeth_hdr hdr;    /*hdr->hdr.l3.xxx*/
    struct qeth_hdr_ext_tso ext;
} __attribute__ ((packed));


/* flags for qeth_hdr.flags */
#define QETH_HDR_PASSTHRU 0x10
#define QETH_HDR_IPV6     0x80
#define QETH_HDR_CAST_MASK 0x07
enum qeth_cast_flags {
    QETH_CAST_UNICAST   = 0x06,
    QETH_CAST_MULTICAST = 0x04,
    QETH_CAST_BROADCAST = 0x05,
    QETH_CAST_ANYCAST   = 0x07,
    QETH_CAST_NOCAST    = 0x00,
};

enum qeth_layer2_frame_flags {
    QETH_LAYER2_FLAG_MULTICAST = 0x01,
    QETH_LAYER2_FLAG_BROADCAST = 0x02,
    QETH_LAYER2_FLAG_UNICAST   = 0x04,
    QETH_LAYER2_FLAG_VLAN      = 0x10,
};

enum qeth_header_ids {
    QETH_HEADER_TYPE_LAYER3 = 0x01,
    QETH_HEADER_TYPE_LAYER2 = 0x02,
    QETH_HEADER_TYPE_TSO    = 0x03,
    QETH_HEADER_TYPE_OSN    = 0x04,
};
/* flags for qeth_hdr.ext_flags */
#define QETH_HDR_EXT_VLAN_FRAME       0x01
#define QETH_HDR_EXT_TOKEN_ID         0x02
#define QETH_HDR_EXT_INCLUDE_VLAN_TAG 0x04
#define QETH_HDR_EXT_SRC_MAC_ADDR     0x08
#define QETH_HDR_EXT_CSUM_HDR_REQ     0x10
#define QETH_HDR_EXT_CSUM_TRANSP_REQ  0x20
#define QETH_HDR_EXT_UDP          0x40 /*bit off for TCP*/

static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
{
    return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
}

enum qeth_qdio_buffer_states {
    /*
     * inbound: read out by driver; owned by hardware in order to be filled
     * outbound: owned by driver in order to be filled
     */
    QETH_QDIO_BUF_EMPTY,
    /*
     * inbound: filled by hardware; owned by driver in order to be read out
     * outbound: filled by driver; owned by hardware in order to be sent
     */
    QETH_QDIO_BUF_PRIMED,
    /*
     * inbound: not applicable
     * outbound: identified to be pending in TPQ
     */
    QETH_QDIO_BUF_PENDING,
    /*
     * inbound: not applicable
     * outbound: found in completion queue
     */
    QETH_QDIO_BUF_IN_CQ,
    /*
     * inbound: not applicable
     * outbound: handled via transfer pending / completion queue
     */
    QETH_QDIO_BUF_HANDLED_DELAYED,
};

enum qeth_qdio_info_states {
    QETH_QDIO_UNINITIALIZED,
    QETH_QDIO_ALLOCATED,
    QETH_QDIO_ESTABLISHED,
    QETH_QDIO_CLEANING
};

struct qeth_buffer_pool_entry {
    struct list_head list;
    struct list_head init_list;
    void *elements[QDIO_MAX_ELEMENTS_PER_BUFFER];
};

struct qeth_qdio_buffer_pool {
    struct list_head entry_list;
    int buf_count;
};

struct qeth_qdio_buffer {
    struct qdio_buffer *buffer;
    /* the buffer pool entry currently associated to this buffer */
    struct qeth_buffer_pool_entry *pool_entry;
    struct sk_buff *rx_skb;
};

struct qeth_qdio_q {
    struct qdio_buffer qdio_bufs[QDIO_MAX_BUFFERS_PER_Q];
    struct qeth_qdio_buffer bufs[QDIO_MAX_BUFFERS_PER_Q];
    int next_buf_to_init;
} __attribute__ ((aligned(256)));

struct qeth_qdio_out_buffer {
    struct qdio_buffer *buffer;
    atomic_t state;
    int next_element_to_fill;
    struct sk_buff_head skb_list;
    int is_header[16];

    struct qaob *aob;
    struct qeth_qdio_out_q *q;
    struct qeth_qdio_out_buffer *next_pending;
};

struct qeth_card;

enum qeth_out_q_states {
       QETH_OUT_Q_UNLOCKED,
       QETH_OUT_Q_LOCKED,
       QETH_OUT_Q_LOCKED_FLUSH,
};

struct qeth_qdio_out_q {
    struct qdio_buffer qdio_bufs[QDIO_MAX_BUFFERS_PER_Q];
    struct qeth_qdio_out_buffer *bufs[QDIO_MAX_BUFFERS_PER_Q];
    struct qdio_outbuf_state *bufstates; /* convenience pointer */
    int queue_no;
    struct qeth_card *card;
    atomic_t state;
    int do_pack;
    /*
     * index of buffer to be filled by driver; state EMPTY or PACKING
     */
    int next_buf_to_fill;
    /*
     * number of buffers that are currently filled (PRIMED)
     * -> these buffers are hardware-owned
     */
    atomic_t used_buffers;
    /* indicates whether PCI flag must be set (or if one is outstanding) */
    atomic_t set_pci_flags_count;
} __attribute__ ((aligned(256)));

struct qeth_qdio_info {
    atomic_t state;
    /* input */
    int no_in_queues;
    struct qeth_qdio_q *in_q;
    struct qeth_qdio_q *c_q;
    struct qeth_qdio_buffer_pool in_buf_pool;
    struct qeth_qdio_buffer_pool init_pool;
    int in_buf_size;

    /* output */
    int no_out_queues;
    struct qeth_qdio_out_q **out_qs;
    struct qdio_outbuf_state *out_bufstates;

    /* priority queueing */
    int do_prio_queueing;
    int default_out_queue;
};

enum qeth_send_errors {
    QETH_SEND_ERROR_NONE,
    QETH_SEND_ERROR_LINK_FAILURE,
    QETH_SEND_ERROR_RETRY,
    QETH_SEND_ERROR_KICK_IT,
};

#define QETH_ETH_MAC_V4      0x0100 /* like v4 */
#define QETH_ETH_MAC_V6      0x3333 /* like v6 */
/* tr mc mac is longer, but that will be enough to detect mc frames */
#define QETH_TR_MAC_NC       0xc000 /* non-canonical */
#define QETH_TR_MAC_C        0x0300 /* canonical */

#define DEFAULT_ADD_HHLEN 0
#define MAX_ADD_HHLEN 1024

#define QETH_CMD_BUFFER_NO  8

enum qeth_channel_states {
    CH_STATE_UP,
    CH_STATE_DOWN,
    CH_STATE_ACTIVATING,
    CH_STATE_HALTED,
    CH_STATE_STOPPED,
    CH_STATE_RCD,
    CH_STATE_RCD_DONE,
};
enum qeth_card_states {
    CARD_STATE_DOWN,
    CARD_STATE_HARDSETUP,
    CARD_STATE_SOFTSETUP,
    CARD_STATE_UP,
    CARD_STATE_RECOVER,
};

enum qeth_prot_versions {
    QETH_PROT_IPV4 = 0x0004,
    QETH_PROT_IPV6 = 0x0006,
};

enum qeth_ip_types {
    QETH_IP_TYPE_NORMAL,
    QETH_IP_TYPE_VIPA,
    QETH_IP_TYPE_RXIP,
    QETH_IP_TYPE_DEL_ALL_MC,
};

enum qeth_cmd_buffer_state {
    BUF_STATE_FREE,
    BUF_STATE_LOCKED,
    BUF_STATE_PROCESSED,
};

enum qeth_cq {
    QETH_CQ_DISABLED = 0,
    QETH_CQ_ENABLED = 1,
    QETH_CQ_NOTAVAILABLE = 2,
};

struct qeth_ipato {
    int enabled;
    int invert4;
    int invert6;
    struct list_head entries;
};

struct qeth_channel;

struct qeth_cmd_buffer {
    enum qeth_cmd_buffer_state state;
    struct qeth_channel *channel;
    unsigned char *data;
    int rc;
    void (*callback) (struct qeth_channel *, struct qeth_cmd_buffer *);
};

struct qeth_channel {
    enum qeth_channel_states state;
    struct ccw1 ccw;
    spinlock_t iob_lock;
    wait_queue_head_t wait_q;
    struct tasklet_struct irq_tasklet;
    struct ccw_device *ccwdev;
/*command buffer for control data*/
    struct qeth_cmd_buffer iob[QETH_CMD_BUFFER_NO];
    atomic_t irq_pending;
    int io_buf_no;
    int buf_no;
};

struct qeth_token {
    __u32 issuer_rm_w;
    __u32 issuer_rm_r;
    __u32 cm_filter_w;
    __u32 cm_filter_r;
    __u32 cm_connection_w;
    __u32 cm_connection_r;
    __u32 ulp_filter_w;
    __u32 ulp_filter_r;
    __u32 ulp_connection_w;
    __u32 ulp_connection_r;
};

struct qeth_seqno {
    __u32 trans_hdr;
    __u32 pdu_hdr;
    __u32 pdu_hdr_ack;
    __u16 ipa;
    __u32 pkt_seqno;
};

struct qeth_reply {
    struct list_head list;
    wait_queue_head_t wait_q;
    int (*callback)(struct qeth_card *, struct qeth_reply *,
        unsigned long);
    u32 seqno;
    unsigned long offset;
    atomic_t received;
    int rc;
    void *param;
    struct qeth_card *card;
    atomic_t refcnt;
};


struct qeth_card_blkt {
    int time_total;
    int inter_packet;
    int inter_packet_jumbo;
};

#define QETH_BROADCAST_WITH_ECHO    0x01
#define QETH_BROADCAST_WITHOUT_ECHO 0x02
#define QETH_LAYER2_MAC_READ        0x01
#define QETH_LAYER2_MAC_REGISTERED  0x02
struct qeth_card_info {
    unsigned short unit_addr2;
    unsigned short cula;
    unsigned short chpid;
    __u16 func_level;
    char mcl_level[QETH_MCL_LENGTH + 1];
    int guestlan;
    int mac_bits;
    int portname_required;
    int portno;
    char portname[9];
    enum qeth_card_types type;
    enum qeth_link_types link_type;
    int is_multicast_different;
    int initial_mtu;
    int max_mtu;
    int broadcast_capable;
    int unique_id;
    struct qeth_card_blkt blkt;
    __u32 csum_mask;
    __u32 tx_csum_mask;
    enum qeth_ipa_promisc_modes promisc_mode;
    __u32 diagass_support;
    __u32 hwtrap;
};

struct qeth_card_options {
    struct qeth_routing_info route4;
    struct qeth_ipa_info ipa4;
    struct qeth_ipa_info adp; /*Adapter parameters*/
    struct qeth_routing_info route6;
    struct qeth_ipa_info ipa6;
    int fake_broadcast;
    int add_hhlen;
    int layer2;
    int performance_stats;
    int rx_sg_cb;
    enum qeth_ipa_isolation_modes isolation;
    int sniffer;
    enum qeth_cq cq;
    char hsuid[9];
};

/*
 * thread bits for qeth_card thread masks
 */
enum qeth_threads {
    QETH_RECOVER_THREAD = 1,
};

struct qeth_osn_info {
    int (*assist_cb)(struct net_device *dev, void *data);
    int (*data_cb)(struct sk_buff *skb);
};

enum qeth_discipline_id {
    QETH_DISCIPLINE_LAYER3 = 0,
    QETH_DISCIPLINE_LAYER2 = 1,
};

struct qeth_discipline {
    void (*start_poll)(struct ccw_device *, int, unsigned long);
    qdio_handler_t *input_handler;
    qdio_handler_t *output_handler;
    int (*recover)(void *ptr);
    int (*setup) (struct ccwgroup_device *);
    void (*remove) (struct ccwgroup_device *);
    int (*set_online) (struct ccwgroup_device *);
    int (*set_offline) (struct ccwgroup_device *);
    void (*shutdown)(struct ccwgroup_device *);
    int (*prepare) (struct ccwgroup_device *);
    void (*complete) (struct ccwgroup_device *);
    int (*freeze)(struct ccwgroup_device *);
    int (*thaw) (struct ccwgroup_device *);
    int (*restore)(struct ccwgroup_device *);
};

struct qeth_vlan_vid {
    struct list_head list;
    unsigned short vid;
};

struct qeth_mc_mac {
    struct list_head list;
    __u8 mc_addr[MAX_ADDR_LEN];
    unsigned char mc_addrlen;
    int is_vmac;
};

struct qeth_rx {
    int b_count;
    int b_index;
    struct qdio_buffer_element *b_element;
    int e_offset;
    int qdio_err;
};

#define QETH_NAPI_WEIGHT 128

struct qeth_card {
    struct list_head list;
    enum qeth_card_states state;
    int lan_online;
    spinlock_t lock;
    struct ccwgroup_device *gdev;
    struct qeth_channel read;
    struct qeth_channel write;
    struct qeth_channel data;

    struct net_device *dev;
    struct net_device_stats stats;

    struct qeth_card_info info;
    struct qeth_token token;
    struct qeth_seqno seqno;
    struct qeth_card_options options;

    wait_queue_head_t wait_q;
    spinlock_t vlanlock;
    spinlock_t mclock;
    unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
    struct list_head vid_list;
    struct list_head mc_list;
    struct work_struct kernel_thread_starter;
    spinlock_t thread_mask_lock;
    unsigned long thread_start_mask;
    unsigned long thread_allowed_mask;
    unsigned long thread_running_mask;
    spinlock_t ip_lock;
    struct list_head ip_list;
    struct list_head *ip_tbd_list;
    struct qeth_ipato ipato;
    struct list_head cmd_waiter_list;
    /* QDIO buffer handling */
    struct qeth_qdio_info qdio;
    struct qeth_perf_stats perf_stats;
    int read_or_write_problem;
    struct qeth_osn_info osn_info;
    struct qeth_discipline *discipline;
    atomic_t force_alloc_skb;
    struct service_level qeth_service_level;
    struct qdio_ssqd_desc ssqd;
    debug_info_t *debug;
    struct mutex conf_mutex;
    struct mutex discipline_mutex;
    struct napi_struct napi;
    struct qeth_rx rx;
    struct delayed_work buffer_reclaim_work;
    int reclaim_index;
};

struct qeth_card_list_struct {
    struct list_head list;
    rwlock_t rwlock;
};

struct qeth_trap_id {
    __u16 lparnr;
    char vmname[8];
    __u8 chpid;
    __u8 ssid;
    __u16 devno;
} __packed;

/*some helper functions*/
#define QETH_CARD_IFNAME(card) (((card)->dev)? (card)->dev->name : "")

static inline struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
{
    struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
        dev_get_drvdata(&cdev->dev))->dev);
    return card;
}

static inline int qeth_get_micros(void)
{
    return (int) (get_clock() >> 12);
}

static inline int qeth_get_ip_version(struct sk_buff *skb)
{
    struct ethhdr *ehdr = (struct ethhdr *)skb->data;
    switch (ehdr->h_proto) {
    case ETH_P_IPV6:
        return 6;
    case ETH_P_IP:
        return 4;
    default:
        return 0;
    }
}

static inline void qeth_put_buffer_pool_entry(struct qeth_card *card,
        struct qeth_buffer_pool_entry *entry)
{
    list_add_tail(&entry->list, &card->qdio.in_buf_pool.entry_list);
}

static inline int qeth_is_diagass_supported(struct qeth_card *card,
        enum qeth_diags_cmds cmd)
{
    return card->info.diagass_support & (__u32)cmd;
}

extern struct qeth_discipline qeth_l2_discipline;
extern struct qeth_discipline qeth_l3_discipline;
extern const struct attribute_group *qeth_generic_attr_groups[];
extern const struct attribute_group *qeth_osn_attr_groups[];

const char *qeth_get_cardname_short(struct qeth_card *);
int qeth_realloc_buffer_pool(struct qeth_card *, int);
int qeth_core_load_discipline(struct qeth_card *, enum qeth_discipline_id);
void qeth_core_free_discipline(struct qeth_card *);
void qeth_buffer_reclaim_work(struct work_struct *);

/* exports for qeth discipline device drivers */
extern struct qeth_card_list_struct qeth_core_card_list;
extern struct kmem_cache *qeth_core_header_cache;
extern struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS];

void qeth_set_allowed_threads(struct qeth_card *, unsigned long , int);
int qeth_threads_running(struct qeth_card *, unsigned long);
int qeth_wait_for_threads(struct qeth_card *, unsigned long);
int qeth_do_run_thread(struct qeth_card *, unsigned long);
void qeth_clear_thread_start_bit(struct qeth_card *, unsigned long);
void qeth_clear_thread_running_bit(struct qeth_card *, unsigned long);
int qeth_core_hardsetup_card(struct qeth_card *);
void qeth_print_status_message(struct qeth_card *);
int qeth_init_qdio_queues(struct qeth_card *);
int qeth_send_startlan(struct qeth_card *);
int qeth_send_stoplan(struct qeth_card *);
int qeth_send_ipa_cmd(struct qeth_card *, struct qeth_cmd_buffer *,
          int (*reply_cb)
          (struct qeth_card *, struct qeth_reply *, unsigned long),
          void *);
struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *,
            enum qeth_ipa_cmds, enum qeth_prot_versions);
int qeth_query_setadapterparms(struct qeth_card *);
int qeth_check_qdio_errors(struct qeth_card *, struct qdio_buffer *,
        unsigned int, const char *);
void qeth_queue_input_buffer(struct qeth_card *, int);
struct sk_buff *qeth_core_get_next_skb(struct qeth_card *,
        struct qeth_qdio_buffer *, struct qdio_buffer_element **, int *,
        struct qeth_hdr **);
void qeth_schedule_recovery(struct qeth_card *);
void qeth_qdio_start_poll(struct ccw_device *, int, unsigned long);
void qeth_qdio_input_handler(struct ccw_device *,
        unsigned int, unsigned int, int,
        int, unsigned long);
void qeth_qdio_output_handler(struct ccw_device *, unsigned int,
            int, int, int, unsigned long);
void qeth_clear_ipacmd_list(struct qeth_card *);
int qeth_qdio_clear_card(struct qeth_card *, int);
void qeth_clear_working_pool_list(struct qeth_card *);
void qeth_clear_cmd_buffers(struct qeth_channel *);
void qeth_clear_qdio_buffers(struct qeth_card *);
void qeth_setadp_promisc_mode(struct qeth_card *);
struct net_device_stats *qeth_get_stats(struct net_device *);
int qeth_change_mtu(struct net_device *, int);
int qeth_setadpparms_change_macaddr(struct qeth_card *);
void qeth_tx_timeout(struct net_device *);
void qeth_prepare_control_data(struct qeth_card *, int,
                struct qeth_cmd_buffer *);
void qeth_release_buffer(struct qeth_channel *, struct qeth_cmd_buffer *);
void qeth_prepare_ipa_cmd(struct qeth_card *, struct qeth_cmd_buffer *, char);
struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *);
int qeth_mdio_read(struct net_device *, int, int);
int qeth_snmp_command(struct qeth_card *, char __user *);
int qeth_query_oat_command(struct qeth_card *, char __user *);
struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *, __u32, __u32);
int qeth_default_setadapterparms_cb(struct qeth_card *, struct qeth_reply *,
                    unsigned long);
int qeth_send_control_data(struct qeth_card *, int, struct qeth_cmd_buffer *,
    int (*reply_cb)(struct qeth_card *, struct qeth_reply*, unsigned long),
    void *reply_param);
int qeth_get_priority_queue(struct qeth_card *, struct sk_buff *, int, int);
int qeth_get_elements_no(struct qeth_card *, void *, struct sk_buff *, int);
int qeth_do_send_packet_fast(struct qeth_card *, struct qeth_qdio_out_q *,
            struct sk_buff *, struct qeth_hdr *, int, int, int);
int qeth_do_send_packet(struct qeth_card *, struct qeth_qdio_out_q *,
            struct sk_buff *, struct qeth_hdr *, int);
int qeth_core_get_sset_count(struct net_device *, int);
void qeth_core_get_ethtool_stats(struct net_device *,
                struct ethtool_stats *, u64 *);
void qeth_core_get_strings(struct net_device *, u32, u8 *);
void qeth_core_get_drvinfo(struct net_device *, struct ethtool_drvinfo *);
void qeth_dbf_longtext(debug_info_t *id, int level, char *text, ...);
int qeth_core_ethtool_get_settings(struct net_device *, struct ethtool_cmd *);
int qeth_set_access_ctrl_online(struct qeth_card *card);
int qeth_hdr_chk_and_bounce(struct sk_buff *, int);
int qeth_configure_cq(struct qeth_card *, enum qeth_cq);
int qeth_hw_trap(struct qeth_card *, enum qeth_diags_trap_action);
int qeth_query_ipassists(struct qeth_card *, enum qeth_prot_versions prot);

/* exports for OSN */
int qeth_osn_assist(struct net_device *, void *, int);
int qeth_osn_register(unsigned char *read_dev_no, struct net_device **,
        int (*assist_cb)(struct net_device *, void *),
        int (*data_cb)(struct sk_buff *));
void qeth_osn_deregister(struct net_device *);

#endif /* __QETH_CORE_H__ */