linux/drivers/s390/net/qeth_core.h

/*
 *  drivers/s390/net/qeth_core.h
 *
 *    Copyright IBM Corp. 2007
 *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
 *		 Frank Pavlic <fpavlic@de.ibm.com>,
 *		 Thomas Spatzier <tspat@de.ibm.com>,
 *		 Frank Blaschka <frank.blaschka@de.ibm.com>
 */

#ifndef __QETH_CORE_H__
#define __QETH_CORE_H__

#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/if_tr.h>
#include <linux/trdevice.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 "qeth_core_mpc.h"

#define KMSG_COMPONENT "qeth"

/**
 * Debug Facility stuff
 */
enum qeth_dbf_names {
	QETH_DBF_SETUP,
	QETH_DBF_QERR,
	QETH_DBF_TRACE,
	QETH_DBF_MSG,
	QETH_DBF_SENSE,
	QETH_DBF_MISC,
	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...) \
	do { \
		if (qeth_dbf_passes(qeth_dbf[QETH_DBF_##name].id, level)) { \
			char *dbf_txt_buf = \
				get_cpu_var(QETH_DBF_TXT_BUF); \
			sprintf(dbf_txt_buf, text); \
			debug_text_event(qeth_dbf[QETH_DBF_##name].id, \
					level, dbf_txt_buf); \
			put_cpu_var(QETH_DBF_TXT_BUF); \
		} \
	} while (0)

/* Allow to sort out low debug levels early to avoid wasted sprints */
static inline int qeth_dbf_passes(debug_info_t *dbf_grp, int level)
{
	return (level <= dbf_grp->level);
}

/**
 * some more debug stuff
 */
#define PRINTK_HEADER	"qeth: "

#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) card->gdev->dev.bus_id
#define CARD_RDEV_ID(card) card->read.ccwdev->dev.bus_id
#define CARD_WDEV_ID(card) card->write.ccwdev->dev.bus_id
#define CARD_DDEV_ID(card) card->data.ccwdev->dev.bus_id
#define CHANNEL_ID(channel) channel->ccwdev->dev.bus_id

/**
 * card stuff
 */
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_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;
	/* eddp data */
	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;
};

/* 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_OSAE_ENA_IPAT 0x0101
#define QETH_IDX_FUNC_LEVEL_OSAE_DIS_IPAT 0x0101
#define QETH_IDX_FUNC_LEVEL_IQD_ENA_IPAT 0x4108
#define QETH_IDX_FUNC_LEVEL_IQD_DIS_IPAT 0x5108

#define QETH_MODELLIST_ARRAY \
	{{0x1731, 0x01, 0x1732, 0x01, QETH_CARD_TYPE_OSAE, 1, \
	QETH_IDX_FUNC_LEVEL_OSAE_ENA_IPAT, \
	QETH_IDX_FUNC_LEVEL_OSAE_DIS_IPAT, \
	QETH_MAX_QUEUES, 0}, \
	{0x1731, 0x05, 0x1732, 0x05, QETH_CARD_TYPE_IQD, 0, \
	QETH_IDX_FUNC_LEVEL_IQD_ENA_IPAT, \
	QETH_IDX_FUNC_LEVEL_IQD_DIS_IPAT, \
	QETH_MAX_QUEUES, 0x103}, \
	{0x1731, 0x06, 0x1732, 0x06, QETH_CARD_TYPE_OSN, 0, \
	QETH_IDX_FUNC_LEVEL_OSAE_ENA_IPAT, \
	QETH_IDX_FUNC_LEVEL_OSAE_DIS_IPAT, \
	QETH_MAX_QUEUES, 0}, \
	{0, 0, 0, 0, 0, 0, 0, 0, 0} }

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

/**
 * some more defs
 */
#define QETH_TX_TIMEOUT		100 * HZ
#define QETH_RCD_TIMEOUT	60 * 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 16
#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

#define QETH_MIN_INPUT_THRESHOLD 1
#define QETH_MAX_INPUT_THRESHOLD 500
#define QETH_MIN_OUTPUT_THRESHOLD 1
#define QETH_MAX_OUTPUT_THRESHOLD 300

/* 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)

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_TSO          0x40 /*bit off for TCP*/

static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
{
	return (sbale->flags & SBAL_FLAGS_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,
};

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 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)));

/* possible types of qeth large_send support */
enum qeth_large_send_types {
	QETH_LARGE_SEND_NO,
	QETH_LARGE_SEND_EDDP,
	QETH_LARGE_SEND_TSO,
};

struct qeth_qdio_out_buffer {
	struct qdio_buffer *buffer;
	atomic_t state;
	int next_element_to_fill;
	struct sk_buff_head skb_list;
	struct list_head ctx_list;
};

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];
	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 */
	struct qeth_qdio_q *in_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;

	/* 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

/**
 * buffer stuff for read channel
 */
#define QETH_CMD_BUFFER_NO	8

/**
 *  channel state machine
 */
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,
};
/**
 * card state machine
 */
enum qeth_card_states {
	CARD_STATE_DOWN,
	CARD_STATE_HARDSETUP,
	CARD_STATE_SOFTSETUP,
	CARD_STATE_UP,
	CARD_STATE_RECOVER,
};

/**
 * Protocol versions
 */
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,
};

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 *);
};

/**
 * definition of a qeth channel, used for read and write
 */
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;
};

/**
 *  OSA card related definitions
 */
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;
	enum qeth_ipa_promisc_modes promisc_mode;
};

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;
	enum qeth_checksum_types checksum_type;
	int broadcast_mode;
	int macaddr_mode;
	int fake_broadcast;
	int add_hhlen;
	int fake_ll;
	int layer2;
	enum qeth_large_send_types large_send;
	int performance_stats;
	int rx_sg_cb;
};

/*
 * 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 {
	qdio_handler_t *input_handler;
	qdio_handler_t *output_handler;
	int (*recover)(void *ptr);
	struct ccwgroup_driver *ccwgdriver;
};

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;
};

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;
	struct vlan_group *vlangrp;
	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 use_hard_stop;
	struct qeth_osn_info osn_info;
	struct qeth_discipline discipline;
	atomic_t force_alloc_skb;
};

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

/*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 void *qeth_push_skb(struct qeth_card *card, struct sk_buff *skb,
		int size)
{
	void *hdr;

	hdr = (void *) skb_push(skb, size);
	/*
	 * sanity check, the Linux memory allocation scheme should
	 * never present us cases like this one (the qdio header size plus
	 * the first 40 bytes of the paket cross a 4k boundary)
	 */
	if ((((unsigned long) hdr) & (~(PAGE_SIZE - 1))) !=
	    (((unsigned long) hdr + size +
	    QETH_IP_HEADER_SIZE) & (~(PAGE_SIZE - 1)))) {
		PRINT_ERR("Misaligned packet on interface %s. Discarded.",
			QETH_CARD_IFNAME(card));
		return NULL;
	}
	return hdr;
}

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

struct qeth_eddp_context;
extern struct ccwgroup_driver qeth_l2_ccwgroup_driver;
extern struct ccwgroup_driver qeth_l3_ccwgroup_driver;
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 *);
int qeth_core_create_device_attributes(struct device *);
void qeth_core_remove_device_attributes(struct device *);
int qeth_core_create_osn_attributes(struct device *);
void qeth_core_remove_osn_attributes(struct device *);

/* exports for qeth discipline device drivers */
extern struct qeth_card_list_struct qeth_core_card_list;

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 qdio_buffer *, unsigned int,
		       unsigned int, const char *);
void qeth_put_buffer_pool_entry(struct qeth_card *,
			   struct qeth_buffer_pool_entry *);
void qeth_queue_input_buffer(struct qeth_card *, int);
struct sk_buff *qeth_core_get_next_skb(struct qeth_card *,
		struct qdio_buffer *, struct qdio_buffer_element **, int *,
		struct qeth_hdr **);
void qeth_schedule_recovery(struct qeth_card *);
void qeth_qdio_output_handler(struct ccw_device *, unsigned int,
			unsigned int, unsigned int,
			unsigned 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_set_large_send(struct qeth_card *, enum qeth_large_send_types);
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_cast_type(struct qeth_card *, struct sk_buff *);
int qeth_get_priority_queue(struct qeth_card *, struct sk_buff *, int, int);
struct sk_buff *qeth_prepare_skb(struct qeth_card *, struct sk_buff *,
		 struct qeth_hdr **);
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,
			struct qeth_eddp_context *);
int qeth_do_send_packet(struct qeth_card *, struct qeth_qdio_out_q *,
		    struct sk_buff *, struct qeth_hdr *,
		    int, struct qeth_eddp_context *);
int qeth_core_get_stats_count(struct net_device *);
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 *);

/* 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__ */