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 1.2 1995/12/14 14:19:17 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 char: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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short 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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