ambassador.h

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#define MAX_TRANSFER_DATA 11

typedef struct {
  __be32 address;
  __be32 count;
  __be32 data[MAX_TRANSFER_DATA];
} transfer_block;

typedef struct {
  __be32 result;
  __be32 command;
  union {
    transfer_block transfer;
    __be32 version;
    __be32 start;
    __be32 data[MAX_COMMAND_DATA];
  } payload;
  __be32 valid;
} loader_block;

/* command queue */

/* Again all data are BIG ENDIAN */

typedef	struct {
  union {
    struct {
      __be32 vc;
      __be32 flags;
      __be32 rate;
    } open;
    struct {
      __be32 vc;
      __be32 rate;
    } modify_rate;
    struct {
      __be32 vc;
      __be32 flags;
    } modify_flags;
    struct {
      __be32 vc;
    } close;
    struct {
      __be32 lower4;
      __be32 upper2;
    } bia;
    struct {
      __be32 address;
    } suni;
    struct {
      __be32 major;
      __be32 minor;
    } version;
    struct {
      __be32 read;
      __be32 write;
    } speed;
    struct {
      __be32 flags;
    } flush;
    struct {
      __be32 address;
      __be32 data;
    } memory;
    __be32 par[3];
  } args;
  __be32 request;
} command;

/* transmit queues and associated structures */

/* The hosts transmit structure. All BIG ENDIAN; host address
   restricted to first 1GByte, but address passed to the card must
   have the top MS bit or'ed in. -- check this */

/* TX is described by 1+ tx_frags followed by a tx_frag_end */

typedef struct {
  __be32 bytes;
  __be32 address;
} tx_frag;

/* apart from handle the fields here are for the adapter to play with
   and should be set to zero */

typedef struct {
  u32	handle;
  u16	vc;
  u16	next_descriptor_length;
  u32	next_descriptor;
#ifdef AMB_NEW_MICROCODE
  u8    cpcs_uu;
  u8    cpi;
  u16   pad;
#endif
} tx_frag_end;

typedef struct {
  tx_frag tx_frag;
  tx_frag_end tx_frag_end;
  struct sk_buff * skb;
} tx_simple;

#if 0
typedef union {
  tx_frag	fragment;
  tx_frag_end	end_of_list;
} tx_descr;
#endif

/* this "points" to the sequence of fragments and trailer */

typedef	struct {
  __be16	vc;
  __be16	tx_descr_length;
  __be32	tx_descr_addr;
} tx_in;

/* handle is the handle from tx_in */

typedef	struct {
  u32 handle;
} tx_out;

/* receive frame structure */

/* All BIG ENDIAN; handle is as passed from host; length is zero for
   aborted frames, and frames with errors. Header is actually VC
   number, lec-id is NOT yet supported. */

typedef struct {
  u32  handle;
  __be16  vc;
  __be16  lec_id; // unused
  __be16  status;
  __be16  length;
} rx_out;

/* buffer supply structure */

typedef	struct {
  u32 handle;
  __be32 host_address;
} rx_in;

/* This first structure is the area in host memory where the adapter
   writes its pointer values. These pointer values are BIG ENDIAN and
   reside in the same 4MB 'page' as this structure. The host gives the
   adapter the address of this block by sending a doorbell interrupt
   to the adapter after downloading the code and setting it going. The
   addresses have the top 10 bits set to 1010000010b -- really?
   
   The host must initialise these before handing the block to the
   adapter. */

typedef struct {
  __be32 command_start;		/* SRB commands completions */
  __be32 command_end;		/* SRB commands completions */
  __be32 tx_start;
  __be32 tx_end;
  __be32 txcom_start;		/* tx completions */
  __be32 txcom_end;		/* tx completions */
  struct {
    __be32 buffer_start;
    __be32 buffer_end;
    u32 buffer_q_get;
    u32 buffer_q_end;
    u32 buffer_aptr;
    __be32 rx_start;		/* rx completions */
    __be32 rx_end;
    u32 rx_ptr;
    __be32 buffer_size;		/* size of host buffer */
  } rec_struct[NUM_RX_POOLS];
#ifdef AMB_NEW_MICROCODE
  u16 init_flags;
  u16 talk_block_spare;
#endif
} adap_talk_block;

/* This structure must be kept in line with the vcr image in sarmain.h
   
   This is the structure in the host filled in by the adapter by
   GET_SUNI_STATS */

typedef struct {
  u8	racp_chcs;
  u8	racp_uhcs;
  u16	spare;
  u32	racp_rcell;
  u32	tacp_tcell;
  u32	flags;
  u32	dropped_cells;
  u32	dropped_frames;
} suni_stats;

typedef enum {
  dead
} amb_flags;

#define NEXTQ(current,start,limit) \
  ( (current)+1 < (limit) ? (current)+1 : (start) ) 

typedef struct {
  command * start;
  command * in;
  command * out;
  command * limit;
} amb_cq_ptrs;

typedef struct {
  spinlock_t lock;
  unsigned int pending;
  unsigned int high;
  unsigned int filled;
  unsigned int maximum; // size - 1 (q implementation)
  amb_cq_ptrs ptrs;
} amb_cq;

typedef struct {
  spinlock_t lock;
  unsigned int pending;
  unsigned int high;
  unsigned int filled;
  unsigned int maximum; // size - 1 (q implementation)
  struct {
    tx_in * start;
    tx_in * ptr;
    tx_in * limit;
  } in;
  struct {
    tx_out * start;
    tx_out * ptr;
    tx_out * limit;
  } out;
} amb_txq;

typedef struct {
  spinlock_t lock;
  unsigned int pending;
  unsigned int low;
  unsigned int emptied;
  unsigned int maximum; // size - 1 (q implementation)
  struct {
    rx_in * start;
    rx_in * ptr;
    rx_in * limit;
  } in;
  struct {
    rx_out * start;
    rx_out * ptr;
    rx_out * limit;
  } out;
  unsigned int buffers_wanted;
  unsigned int buffer_size;
} amb_rxq;

typedef struct {
  unsigned long tx_ok;
  struct {
    unsigned long ok;
    unsigned long error;
    unsigned long badcrc;
    unsigned long toolong;
    unsigned long aborted;
    unsigned long unused;
  } rx;
} amb_stats;

// a single struct pointed to by atm_vcc->dev_data

typedef struct {
  u8               tx_vc_bits:7;
  u8               tx_present:1;
} amb_tx_info;

typedef struct {
  unsigned char    pool;
} amb_rx_info;

typedef struct {
  amb_rx_info      rx_info;
  u16              tx_frame_bits;
  unsigned int     tx_rate;
  unsigned int     rx_rate;
} amb_vcc;

struct amb_dev {
  u8               irq;
  unsigned long	   flags;
  u32              iobase;
  u32 *            membase;

#ifdef FILL_RX_POOLS_IN_BH
  struct work_struct bh;
#endif
  
  amb_cq           cq;
  amb_txq          txq;
  amb_rxq          rxq[NUM_RX_POOLS];
  
  struct semaphore vcc_sf;
  amb_tx_info      txer[NUM_VCS];
  struct atm_vcc * rxer[NUM_VCS];
  unsigned int     tx_avail;
  unsigned int     rx_avail;
  
  amb_stats        stats;
  
  struct atm_dev * atm_dev;
  struct pci_dev * pci_dev;
  struct timer_list housekeeping;
};

typedef struct amb_dev amb_dev;

#define AMB_DEV(atm_dev) ((amb_dev *) (atm_dev)->dev_data)
#define AMB_VCC(atm_vcc) ((amb_vcc *) (atm_vcc)->dev_data)

/* the microcode */

typedef struct {
  u32 start;
  unsigned int count;
} region;

static region ucode_regions[];
static u32 ucode_data[];
static u32 ucode_start;

/* rate rounding */

typedef enum {
  round_up,
  round_down,
  round_nearest
} rounding;

#endif