a09bee1aa8
or unsigned int (this doesn't change the struct layout, size or alignment in any of the files changed in this commit, at least for gcc on i386's. Using bitfields of type u_char may affect size and alignment but not packing)).
150 lines
5.0 KiB
C
150 lines
5.0 KiB
C
/*
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* Written by Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems for use under the MACH(2.5) operating system.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organizations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* $Id: btreg.h,v 1.6 1997/02/22 09:38:43 peter Exp $
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*/
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#ifndef _BTREG_H_
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#define _BTREG_H_
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#include "bt.h"
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/*
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* Mail box defs etc.
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* these could be bigger but we need the bt_data to fit on a single page..
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*/
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#define BT_MBX_SIZE 32 /* mail box size (MAX 255 MBxs) */
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/* don't need that many really */
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#define BT_CCB_MAX 32 /* store up to 32CCBs at any one time */
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/* in bt742a H/W ( Not MAX ? ) */
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#define CCB_HASH_SIZE 32 /* when we have a physical addr. for */
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/* a ccb and need to find the ccb in */
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/* space, look it up in the hash table */
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#define BT_NSEG 33 /*
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* Number of SG segments per command
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* Max of 2048???
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*/
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typedef unsigned long int physaddr;
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struct bt_scat_gath {
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unsigned long seg_len;
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physaddr seg_addr;
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};
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typedef struct bt_mbx_out {
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physaddr ccb_addr;
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unsigned char dummy[3];
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unsigned char cmd;
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} BT_MBO;
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typedef struct bt_mbx_in {
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physaddr ccb_addr;
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unsigned char btstat;
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unsigned char sdstat;
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unsigned char dummy;
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unsigned char stat;
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} BT_MBI;
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struct bt_mbx {
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BT_MBO mbo[BT_MBX_SIZE];
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#define BT_MBO_FREE 0x0 /* MBO intry is free */
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#define BT_MBO_START 0x1 /* MBO activate entry */
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#define BT_MBO_ABORT 0x2 /* MBO abort entry */
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BT_MBI mbi[BT_MBX_SIZE];
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#define BT_MBI_FREE 0x0 /* MBI entry is free */
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#define BT_MBI_OK 0x1 /* completed without error */
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#define BT_MBI_ABORT 0x2 /* aborted ccb */
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#define BT_MBI_UNKNOWN 0x3 /* Tried to abort invalid CCB */
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#define BT_MBI_ERROR 0x4 /* Completed with error */
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BT_MBO *tmbo; /* Target Mail Box out */
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BT_MBI *tmbi; /* Target Mail Box in */
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};
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struct bt_ccb {
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unsigned char opcode;
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#define BT_INITIATOR_CCB 0x00 /* SCSI Initiator CCB */
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#define BT_TARGET_CCB 0x01 /* SCSI Target CCB */
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#define BT_INIT_SCAT_GATH_CCB 0x02 /* SCSI Initiator w/sg */
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#define BT_RESET_CCB 0x81 /* SCSI Bus reset */
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unsigned :3, data_in:1, data_out:1,:3;
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unsigned char scsi_cmd_length;
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unsigned char req_sense_length;
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unsigned long data_length;
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physaddr data_addr;
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unsigned char dummy[2];
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unsigned char host_stat;
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#define BT_OK 0x00 /* cmd ok */
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#define BT_LINK_OK 0x0a /* Link cmd ok */
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#define BT_LINK_IT 0x0b /* Link cmd ok + int */
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#define BT_SEL_TIMEOUT 0x11 /* Selection time out */
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#define BT_OVER_UNDER 0x12 /* Data over/under run */
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#define BT_BUS_FREE 0x13 /* Bus dropped at unexpected time */
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#define BT_INV_BUS 0x14 /* Invalid bus phase/sequence */
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#define BT_BAD_MBO 0x15 /* Incorrect MBO cmd */
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#define BT_BAD_CCB 0x16 /* Incorrect ccb opcode */
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#define BT_BAD_LINK 0x17 /* Not same values of LUN for links */
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#define BT_INV_TARGET 0x18 /* Invalid target direction */
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#define BT_CCB_DUP 0x19 /* Duplicate CCB received */
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#define BT_INV_CCB 0x1a /* Invalid CCB or segment list */
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#define BT_ABORTED 42 /* pseudo value from driver */
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unsigned char target_stat;
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unsigned char target;
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unsigned char lun;
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unsigned char scsi_cmd[12]; /* 12 bytes (bytes only) */
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unsigned char dummy2[1];
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unsigned char link_id;
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physaddr link_addr;
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physaddr sense_ptr;
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struct scsi_sense_data scsi_sense;
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struct bt_scat_gath scat_gath[BT_NSEG];
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struct bt_ccb *next;
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struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */
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struct bt_mbx_out *mbx; /* pointer to mail box */
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int flags;
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#define CCB_FREE 0
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#define CCB_ACTIVE 1
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#define CCB_ABORTED 2
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struct bt_ccb *nexthash; /* if two hash the same */
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physaddr hashkey; /*physaddr of this ccb */
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};
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struct bt_data {
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int bt_base; /* base port for each board */
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struct bt_mbx bt_mbx; /* all our mailboxes */
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struct bt_ccb *bt_ccb_free; /* list of free CCBs */
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struct bt_ccb *ccbhash[CCB_HASH_SIZE]; /* phys to kv hash */
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int bt_int; /* int. read off board */
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int bt_dma; /* DMA channel read of board */
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int bt_scsi_dev; /* adapters scsi id */
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int numccbs; /* how many we have malloc'd */
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int bt_bounce; /* should we bounce? */
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int unit; /* The zero in bt0 */
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struct scsi_link sc_link; /* prototype for devs */
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};
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extern struct bt_data *btdata[NBT];
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extern u_long bt_unit;
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struct bt_data *bt_alloc __P((int unit, u_long iobase));
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void bt_free __P((struct bt_data *bt));
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void bt_intr __P((void *arg));
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int bt_init __P((struct bt_data *bt));
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int bt_attach __P((struct bt_data *bt));
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#endif /* _BT_H_ */
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