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This commit was manufactured by cvs2svn to create tag 'FreeBSD-release/1.0'.
[unix-history] / sys / i386 / isa / bt742a.c
/*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*
* $Id: bt742a.c,v 1.7 1993/08/28 03:07:42 rgrimes Exp $
*/
/*
* bt742a SCSI driver
*/
#include <sys/types.h>
#include <bt.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#ifdef MACH /* EITHER CMU OR OSF */
#include <i386/ipl.h>
#include <i386at/scsi.h>
#include <i386at/scsiconf.h>
#ifdef OSF /* OSF ONLY */
#include <sys/table.h>
#include <i386/handler.h>
#include <i386/dispatcher.h>
#include <i386/AT386/atbus.h>
#else OSF /* CMU ONLY */
#include <i386at/atbus.h>
#include <i386/pio.h>
#endif OSF
#endif MACH /* end of MACH specific */
#ifdef __386BSD__ /* 386BSD specific */
#define isa_dev isa_device
#define dev_unit id_unit
#define dev_addr id_iobase
#include <i386/isa/isa_device.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#endif __386BSD__
#ifdef __386BSD__
#include "ddb.h"
#if NDDB > 0
int Debugger();
#else NDDB
#define Debugger() panic("should call debugger here (bt742a.c)")
#endif NDDB
#endif __386BSD__
#ifdef MACH
int Debugger();
#endif MACH
extern int hz;
extern int delaycount; /* from clock setup code */
typedef unsigned long int physaddr;
/*
* I/O Port Interface
*/
#define BT_BASE bt_base[unit]
#define BT_CTRL_STAT_PORT (BT_BASE + 0x0) /* control & status */
#define BT_CMD_DATA_PORT (BT_BASE + 0x1) /* cmds and datas */
#define BT_INTR_PORT (BT_BASE + 0x2) /* Intr. stat */
/*
* BT_CTRL_STAT bits (write)
*/
#define BT_HRST 0x80 /* Hardware reset */
#define BT_SRST 0x40 /* Software reset */
#define BT_IRST 0x20 /* Interrupt reset */
#define BT_SCRST 0x10 /* SCSI bus reset */
/*
* BT_CTRL_STAT bits (read)
*/
#define BT_STST 0x80 /* Self test in Progress */
#define BT_DIAGF 0x40 /* Diagnostic Failure */
#define BT_INIT 0x20 /* Mbx Init required */
#define BT_IDLE 0x10 /* Host Adapter Idle */
#define BT_CDF 0x08 /* cmd/data out port full */
#define BT_DF 0x04 /* Data in port full */
#define BT_INVDCMD 0x01 /* Invalid command */
/*
* BT_CMD_DATA bits (write)
*/
#define BT_NOP 0x00 /* No operation */
#define BT_MBX_INIT 0x01 /* Mbx initialization */
#define BT_START_SCSI 0x02 /* start scsi command */
#define BT_START_BIOS 0x03 /* start bios command */
#define BT_INQUIRE 0x04 /* Adapter Inquiry */
#define BT_MBO_INTR_EN 0x05 /* Enable MBO available interrupt */
#define BT_SEL_TIMEOUT_SET 0x06 /* set selection time-out */
#define BT_BUS_ON_TIME_SET 0x07 /* set bus-on time */
#define BT_BUS_OFF_TIME_SET 0x08 /* set bus-off time */
#define BT_SPEED_SET 0x09 /* set transfer speed */
#define BT_DEV_GET 0x0a /* return installed devices */
#define BT_CONF_GET 0x0b /* return configuration data */
#define BT_TARGET_EN 0x0c /* enable target mode */
#define BT_SETUP_GET 0x0d /* return setup data */
#define BT_WRITE_CH2 0x1a /* write channel 2 buffer */
#define BT_READ_CH2 0x1b /* read channel 2 buffer */
#define BT_WRITE_FIFO 0x1c /* write fifo buffer */
#define BT_READ_FIFO 0x1d /* read fifo buffer */
#define BT_ECHO 0x1e /* Echo command data */
#define BT_MBX_INIT_EXTENDED 0x81 /* Mbx initialization */
#define BT_INQUIRE_EXTENDED 0x8D /* Adapter Setup Inquiry */
/* Follows command appeared at FirmWare 3.31 */
#define BT_ROUND_ROBIN 0x8f /* Enable/Disable(default) round robin */
#define BT_DISABLE 0x00 /* Parameter value for Disable */
#define BT_ENABLE 0x01 /* Parameter value for Enable */
struct bt_cmd_buf {
u_char byte[16];
};
/*
* BT_INTR_PORT bits (read)
*/
#define BT_ANY_INTR 0x80 /* Any interrupt */
#define BT_SCRD 0x08 /* SCSI reset detected */
#define BT_HACC 0x04 /* Command complete */
#define BT_MBOA 0x02 /* MBX out empty */
#define BT_MBIF 0x01 /* MBX in full */
/*
* Mail box defs
*/
#define BT_MBX_SIZE 255 /* mail box size (MAX 255 MBxs) */
#define BT_CCB_SIZE 32 /* store up to 32CCBs at any one time */
/* in bt742a H/W ( Not MAX ? ) */
#define bt_nextmbx( wmb, mbx, mbio ) \
if ( (wmb) == &((mbx)->mbio[BT_MBX_SIZE - 1 ]) ) { \
(wmb) = &((mbx)->mbio[0]); \
} else { \
(wmb)++; \
}
typedef struct bt_mbx_out {
physaddr ccb_addr;
unsigned char dummy[3];
unsigned char cmd;
} BT_MBO;
typedef struct bt_mbx_in{
physaddr ccb_addr;
unsigned char btstat;
unsigned char sdstat;
unsigned char dummy;
unsigned char stat;
} BT_MBI;
struct bt_mbx
{
BT_MBO mbo[BT_MBX_SIZE];
BT_MBI mbi[BT_MBX_SIZE];
BT_MBO *tmbo; /* Target Mail Box out */
BT_MBI *tmbi; /* Target Mail Box in */
};
/*
* mbo.cmd values
*/
#define BT_MBO_FREE 0x0 /* MBO entry is free */
#define BT_MBO_START 0x1 /* MBO activate entry */
#define BT_MBO_ABORT 0x2 /* MBO abort entry */
#define BT_MBI_FREE 0x0 /* MBI entry is free */
#define BT_MBI_OK 0x1 /* completed without error */
#define BT_MBI_ABORT 0x2 /* aborted ccb */
#define BT_MBI_UNKNOWN 0x3 /* Tried to abort invalid CCB */
#define BT_MBI_ERROR 0x4 /* Completed with error */
extern struct bt_mbx bt_mbx[];
#if defined(BIG_DMA)
/* #define BT_NSEG 8192 /* Number of scatter gather segments - to much vm */
#define BT_NSEG 512
#else
#define BT_NSEG 33
#endif /* BIG_DMA */
struct bt_scat_gath
{
unsigned long seg_len;
physaddr seg_addr;
};
struct bt_ccb {
unsigned char opcode;
unsigned char :3,data_in:1,data_out:1,:3;
unsigned char scsi_cmd_length;
unsigned char req_sense_length;
/*------------------------------------longword boundary */
unsigned long data_length;
/*------------------------------------longword boundary */
physaddr data_addr;
/*------------------------------------longword boundary */
unsigned char dummy[2];
unsigned char host_stat;
unsigned char target_stat;
/*------------------------------------longword boundary */
unsigned char target;
unsigned char lun;
unsigned char scsi_cmd[12]; /* 12 bytes (bytes only)*/
unsigned char dummy2[1];
unsigned char link_id;
/*------------------------------------4 longword boundary */
physaddr link_addr;
/*------------------------------------longword boundary */
physaddr sense_ptr;
/*------------------------------------longword boundary */
struct scsi_sense_data scsi_sense;
/*------------------------------------longword boundary */
struct bt_scat_gath scat_gath[BT_NSEG];
/*------------------------------------longword boundary */
struct bt_ccb *next;
/*------------------------------------longword boundary */
struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */
/*------------------------------------longword boundary */
struct bt_mbx_out *mbx; /* pointer to mail box */
/*------------------------------------longword boundary */
int flags;
#define CCB_FREE 0
#define CCB_ACTIVE 1
#define CCB_ABORTED 2
};
/*
* opcode fields
*/
#define BT_INITIATOR_CCB 0x00 /* SCSI Initiator CCB */
#define BT_TARGET_CCB 0x01 /* SCSI Target CCB */
#define BT_INIT_SCAT_GATH_CCB 0x02 /* SCSI Initiator with scattter gather*/
#define BT_RESET_CCB 0x81 /* SCSI Bus reset */
/*
* bt_ccb.host_stat values
*/
#define BT_OK 0x00 /* cmd ok */
#define BT_LINK_OK 0x0a /* Link cmd ok */
#define BT_LINK_IT 0x0b /* Link cmd ok + int */
#define BT_SEL_TIMEOUT 0x11 /* Selection time out */
#define BT_OVER_UNDER 0x12 /* Data over/under run */
#define BT_BUS_FREE 0x13 /* Bus dropped at unexpected time */
#define BT_INV_BUS 0x14 /* Invalid bus phase/sequence */
#define BT_BAD_MBO 0x15 /* Incorrect MBO cmd */
#define BT_BAD_CCB 0x16 /* Incorrect ccb opcode */
#define BT_BAD_LINK 0x17 /* Not same values of LUN for links */
#define BT_INV_TARGET 0x18 /* Invalid target direction */
#define BT_CCB_DUP 0x19 /* Duplicate CCB received */
#define BT_INV_CCB 0x1a /* Invalid CCB or segment list */
#define BT_ABORTED 42 /* pseudo value from driver */
struct bt_boardID
{
u_char board_type;
u_char custom_feture;
char firm_revision;
u_char firm_version;
};
struct bt_setup
{
u_char sync_neg:1;
u_char parity:1;
u_char :6;
u_char speed;
u_char bus_on;
u_char bus_off;
u_char num_mbx;
u_char mbx[3];
struct {
u_char offset:4;
u_char period:3;
u_char valid:1;
}sync[8];
u_char disc_sts;
};
struct bt_config
{
u_char chan;
u_char intr;
u_char scsi_dev:3;
u_char :5;
};
#define INT9 0x01
#define INT10 0x02
#define INT11 0x04
#define INT12 0x08
#define INT14 0x20
#define INT15 0x40
#define EISADMA 0x00
#define CHAN0 0x01
#define CHAN5 0x20
#define CHAN6 0x40
#define CHAN7 0x80
#ifdef MACH
extern physaddr kvtophys();
#define PHYSTOKV(x) phystokv(x)
#define KVTOPHYS(x) kvtophys(x)
#endif MACH
#ifdef __386BSD__
#define KVTOPHYS(x) vtophys(x)
#endif __386BSD__
#define PAGESIZ 4096
#define INVALIDATE_CACHE {asm volatile( ".byte 0x0F ;.byte 0x08" ); }
u_char bt_scratch_buf[256];
#ifdef MACH
caddr_t bt_base[NBT]; /* base port for each board */
#else MACH
short bt_base[NBT]; /* base port for each board */
#endif MACH
struct bt_mbx bt_mbx[NBT];
struct bt_ccb *bt_ccb_free[NBT];
struct bt_ccb bt_ccb[NBT][BT_CCB_SIZE];
struct scsi_xfer bt_scsi_xfer[NBT];
struct isa_dev *btinfo[NBT];
struct bt_ccb *bt_get_ccb();
int bt_int[NBT];
int bt_dma[NBT];
int bt_scsi_dev[NBT];
int bt_initialized[NBT];
#if defined(OSF)
int bt_attached[NBT];
#endif /* defined(OSF) */
/***********debug values *************/
#define BT_SHOWCCBS 0x01
#define BT_SHOWINTS 0x02
#define BT_SHOWCMDS 0x04
#define BT_SHOWMISC 0x08
int bt_debug = 0;
int btprobe(), btattach();
int btintr();
#ifdef MACH
struct isa_driver btdriver = { btprobe, 0, btattach, "bt", 0, 0, 0};
int (*btintrs[])() = {btintr, 0};
#endif MACH
#ifdef __386BSD__
struct isa_driver btdriver = { btprobe, btattach, "bt"};
#endif __386BSD__
static int btunit = 0;
int bt_scsi_cmd();
int bt_timeout();
void btminphys();
long int bt_adapter_info();
struct scsi_switch bt_switch =
{
bt_scsi_cmd,
btminphys,
0,
0,
bt_adapter_info,
"bt",
0,0
};
#define BT_CMD_TIMEOUT_FUDGE 200 /* multiplied to get Secs */
#define BT_RESET_TIMEOUT 1000000
#define BT_SCSI_TIMEOUT_FUDGE 20 /* divided by for mSecs */
/***********************************************************************\
* bt_cmd(unit,icnt, ocnt,wait, retval, opcode, args) *
* Activate Adapter command *
* icnt: number of args (outbound bytes written after opcode) *
* ocnt: number of expected returned bytes *
* wait: number of seconds to wait for response *
* retval: buffer where to place returned bytes *
* opcode: opcode BT_NOP, BT_MBX_INIT, BT_START_SCSI ... *
* args: parameters *
* *
* Performs an adapter command through the ports. Not to be confused *
* with a scsi command, which is read in via the dma *
* One of the adapter commands tells it to read in a scsi command *
\***********************************************************************/
bt_cmd(unit,icnt, ocnt, wait,retval, opcode, args)
u_char *retval;
unsigned opcode;
u_char args;
{
unsigned *ic = &opcode;
u_char oc;
register i;
int sts;
/*******************************************************\
* multiply the wait argument by a big constant *
* zero defaults to 1 *
\*******************************************************/
if(!wait)
wait = BT_CMD_TIMEOUT_FUDGE * delaycount;
else
wait *= BT_CMD_TIMEOUT_FUDGE * delaycount;
/*******************************************************\
* Wait for the adapter to go idle, unless it's one of *
* the commands which don't need this *
\*******************************************************/
if (opcode != BT_MBX_INIT && opcode != BT_START_SCSI)
{
i = BT_CMD_TIMEOUT_FUDGE * delaycount; /* 1 sec?*/
while (--i)
{
sts = inb(BT_CTRL_STAT_PORT);
if (sts & BT_IDLE)
{
break;
}
}
if (!i)
{
printf("bt%d: bt_cmd, host not idle(0x%x)\n",unit,sts);
return(ENXIO);
}
}
/*******************************************************\
* Now that it is idle, if we expect output, preflush the*
* queue feeding to us. *
\*******************************************************/
if (ocnt)
{
while((inb(BT_CTRL_STAT_PORT)) & BT_DF)
inb(BT_CMD_DATA_PORT);
}
/*******************************************************\
* Output the command and the number of arguments given *
* for each byte, first check the port is empty. *
\*******************************************************/
icnt++; /* include the command */
while (icnt--)
{
sts = inb(BT_CTRL_STAT_PORT);
for (i=0; i< wait; i++)
{
sts = inb(BT_CTRL_STAT_PORT);
if (!(sts & BT_CDF))
break;
}
if (i >= wait)
{
printf("bt%d: bt_cmd, cmd/data port full\n",unit);
outb(BT_CTRL_STAT_PORT, BT_SRST);
return(ENXIO);
}
outb(BT_CMD_DATA_PORT, (u_char)(*ic++));
}
/*******************************************************\
* If we expect input, loop that many times, each time, *
* looking for the data register to have valid data *
\*******************************************************/
while (ocnt--)
{
sts = inb(BT_CTRL_STAT_PORT);
for (i=0; i< wait; i++)
{
sts = inb(BT_CTRL_STAT_PORT);
if (sts & BT_DF)
break;
}
if (i >= wait)
{
printf("bt%d: bt_cmd, cmd/data port empty %d\n",
unit,ocnt);
return(ENXIO);
}
oc = inb(BT_CMD_DATA_PORT);
if (retval)
*retval++ = oc;
}
/*******************************************************\
* Wait for the board to report a finised instruction *
\*******************************************************/
i=BT_CMD_TIMEOUT_FUDGE * delaycount; /* 1 sec? */
while (--i)
{
sts = inb(BT_INTR_PORT);
if (sts & BT_HACC)
{
break;
}
}
if (!i)
{
printf("bt%d: bt_cmd, host not finished(0x%x)\n",unit,sts);
return(ENXIO);
}
outb(BT_CTRL_STAT_PORT, BT_IRST);
return(0);
}
/*******************************************************\
* Check if the device can be found at the port given *
* and if so, set it up ready for further work *
* as an argument, takes the isa_dev structure from *
* autoconf.c *
\*******************************************************/
btprobe(dev)
struct isa_dev *dev;
{
/***********************************************\
* find unit and check we have that many defined *
\***********************************************/
int unit = btunit;
#if defined(OSF)
static ihandler_t bt_handler[NBT];
static ihandler_id_t *bt_handler_id[NBT];
register ihandler_t *chp = &bt_handler[unit];;
#endif /* defined(OSF) */
dev->dev_unit = unit;
bt_base[unit] = dev->dev_addr;
if(unit >= NBT)
{
printf("bt%d: unit number too high\n",unit);
return(0);
}
/***********************************************\
* Try initialise a unit at this location *
* sets up dma and bus speed, loads bt_int[unit]*
\***********************************************/
if (bt_init(unit) != 0)
{
return(0);
}
/***********************************************\
* If it's there, put in it's interrupt vectors *
\***********************************************/
#ifdef MACH
dev->dev_pic = bt_int[unit];
#if defined(OSF) /* OSF */
chp->ih_level = dev->dev_pic;
chp->ih_handler = dev->dev_intr[0];
chp->ih_resolver = i386_resolver;
chp->ih_rdev = dev;
chp->ih_stats.intr_type = INTR_DEVICE;
chp->ih_stats.intr_cnt = 0;
chp->ih_hparam[0].intparam = unit;
if ((bt_handler_id[unit] = handler_add(chp)) != NULL)
handler_enable(bt_handler_id[unit]);
else
panic("Unable to add bt interrupt handler");
#else /* CMU */
take_dev_irq(dev);
#endif /* !defined(OSF) */
printf("port=%x spl=%d\n", dev->dev_addr, dev->dev_spl);
#endif MACH
#ifdef __386BSD__ /* 386BSD */
dev->id_irq = (1 << bt_int[unit]);
dev->id_drq = bt_dma[unit];
#endif __386BSD__
btunit++;
return(1);
}
/***********************************************\
* Attach all the sub-devices we can find *
\***********************************************/
btattach(dev)
struct isa_dev *dev;
{
int unit = dev->dev_unit;
/***********************************************\
* ask the adapter what subunits are present *
\***********************************************/
scsi_attachdevs( unit, bt_scsi_dev[unit], &bt_switch);
#if defined(OSF)
bt_attached[unit]=1;
#endif /* defined(OSF) */
return;
}
/***********************************************\
* Return some information to the caller about *
* the adapter and it's capabilities *
\***********************************************/
long int bt_adapter_info(unit)
int unit;
{
return(2); /* 2 outstanding requests at a time per device */
}
/***********************************************\
* Catch an interrupt from the adaptor *
\***********************************************/
btintr(unit)
{
BT_MBI *wmbi;
struct bt_mbx *wmbx;
struct bt_ccb *ccb;
unsigned char stat;
int i,wait;
int found = 0;
#ifdef UTEST
if(scsi_debug & PRINTROUTINES)
printf("btintr ");
#endif
/***********************************************\
* First acknowlege the interrupt, Then if it's *
* not telling about a completed operation *
* just return. *
\***********************************************/
stat = inb(BT_INTR_PORT);
/* Mail Box out empty ? */
if ( stat & BT_MBOA ) {
printf("bt%d: Available Free mbo post\n",unit);
/* Disable MBO available interrupt */
outb(BT_CMD_DATA_PORT,BT_MBO_INTR_EN);
wait = BT_CMD_TIMEOUT_FUDGE * delaycount;
for (i=0; i< wait; i++)
{
if (!(inb(BT_CTRL_STAT_PORT) & BT_CDF))
break;
}
if (i >= wait)
{
printf("bt%d: bt_intr, cmd/data port full\n",unit);
outb(BT_CTRL_STAT_PORT, BT_SRST);
return 1;
}
outb(BT_CMD_DATA_PORT, 0x00); /* Disable */
wakeup(&bt_mbx[unit]);
outb(BT_CTRL_STAT_PORT, BT_IRST);
return 1;
}
if (! (stat & BT_MBIF)) {
outb(BT_CTRL_STAT_PORT, BT_IRST);
return 1;
}
#if defined(OSF)
if (!bt_attached[unit])
{
return(1);
}
#endif /* defined(OSF) */
/***********************************************\
* If it IS then process the competed operation *
\***********************************************/
wmbx = &bt_mbx[unit];
wmbi = wmbx->tmbi;
AGAIN:
while ( wmbi->stat != BT_MBI_FREE ) {
found++;
ccb = (struct bt_ccb *)PHYSTOKV((wmbi->ccb_addr));
if((stat = wmbi->stat) != BT_MBI_OK)
{
switch(stat)
{
case BT_MBI_ABORT:
#ifdef UTEST
if(bt_debug & BT_SHOWMISC)
printf("abort ");
#endif
ccb->host_stat = BT_ABORTED;
break;
case BT_MBI_UNKNOWN:
ccb = (struct bt_ccb *)0;
#ifdef UTEST
if(bt_debug & BT_SHOWMISC)
printf("unknown ccb for abort");
#endif
break;
case BT_MBI_ERROR:
break;
default:
panic("Impossible mbxi status");
}
#ifdef UTEST
if((bt_debug & BT_SHOWCMDS ) && ccb)
{
u_char *cp;
cp = ccb->scsi_cmd;
printf("op=%x %x %x %x %x %x\n",
cp[0], cp[1], cp[2],
cp[3], cp[4], cp[5]);
printf("stat %x for mbi addr = 0x%08x\n"
, wmbi->stat, wmbi );
printf("addr = 0x%x\n", ccb);
}
#endif
}
wmbi->stat = BT_MBI_FREE;
if(ccb)
{
untimeout(bt_timeout,ccb);
bt_done(unit,ccb);
}
/* Set the IN mail Box pointer for next */
bt_nextmbx( wmbi, wmbx, mbi );
}
if ( !found ) {
for ( i = 0; i < BT_MBX_SIZE; i++) {
if ( wmbi->stat != BT_MBI_FREE ) {
found ++;
break;
}
bt_nextmbx( wmbi, wmbx, mbi );
}
if ( !found ) {
printf("bt%d: mbi at 0x%08x should be found, stat=%02x..resync\n",
unit, wmbi, stat );
} else {
found = 0;
goto AGAIN;
}
}
wmbx->tmbi = wmbi;
outb(BT_CTRL_STAT_PORT, BT_IRST);
return(1);
}
/***********************************************\
* A ccb (and hence a mbx-out is put onto the *
* free list. *
\***********************************************/
bt_free_ccb(unit,ccb, flags)
struct bt_ccb *ccb;
{
unsigned int opri;
#ifdef UTEST
if(scsi_debug & PRINTROUTINES)
printf("ccb%d(0x%x)> ",unit,flags);
#endif
if (!(flags & SCSI_NOMASK))
opri = splbio();
ccb->next = bt_ccb_free[unit];
bt_ccb_free[unit] = ccb;
ccb->flags = CCB_FREE;
/***********************************************\
* If there were none, wake abybody waiting for *
* one to come free, starting with queued entries*
\***********************************************/
if (!ccb->next) {
wakeup(&bt_ccb_free[unit]);
}
if (!(flags & SCSI_NOMASK))
splx(opri);
}
/***********************************************\
* Get a free ccb *
\***********************************************/
struct bt_ccb *
bt_get_ccb(unit,flags)
{
unsigned opri;
struct bt_ccb *rc;
struct bt_mbx *wmbx; /* Mail Box pointer specified unit */
BT_MBO *wmbo; /* Out Mail Box pointer */
#ifdef UTEST
if(scsi_debug & PRINTROUTINES)
printf("<ccb%d(0x%x) ",unit,flags);
#endif
if (!(flags & SCSI_NOMASK))
opri = splbio();
/***********************************************\
* If we can and have to, sleep waiting for one *
* to come free *
\***********************************************/
while ((!(rc = bt_ccb_free[unit])) && (!(flags & SCSI_NOSLEEP)))
{
sleep(&bt_ccb_free[unit], PRIBIO);
}
if (rc)
{
/* Get CCB from from free list */
bt_ccb_free[unit] = rc->next;
rc->flags = CCB_ACTIVE;
#ifdef HE
/* Get the Target OUT mail Box pointer */
wmbx = &bt_mbx[unit];
wmbo = wmbx->tmbo;
while ( wmbo->cmd != BT_MBO_FREE ) {
/* Enable MBO available interrupt */
outb(BT_CMD_DATA_PORT,BT_MBO_INTR_EN);
printf("Wait free mbo.."); /* AMURAI */
sleep( wmbx, PRIBIO);
printf("Got free mbo\n"); /* AMURAI */
}
/* Link CCB to the Mail Box */
rc->mbx = wmbo;
wmbo->ccb_addr = KVTOPHYS(rc);
/* Set the OUT mail Box pointer for next */
bt_nextmbx( wmbo, wmbx, mbo );
wmbx->tmbo = wmbo;
#endif
}
if (!(flags & SCSI_NOMASK))
splx(opri);
return(rc);
}
/***********************************************\
* Get a MBO and then Send it *
\***********************************************/
BT_MBO *bt_send_mbo( int unit,
int flags,
int cmd,
struct bt_ccb *ccb )
{
unsigned opri;
BT_MBO *wmbo; /* Mail Box Out pointer */
struct bt_mbx *wmbx; /* Mail Box pointer specified unit */
int i, wait;
wmbx = &bt_mbx[unit];
if (!(flags & SCSI_NOMASK))
opri = splbio();
/* Get the Target OUT mail Box pointer and move to Next */
wmbo = wmbx->tmbo;
wmbx->tmbo = ( wmbo == &( wmbx->mbo[BT_MBX_SIZE - 1 ] ) ?
&(wmbx->mbo[0]) : wmbo + 1 );
/*
* Check the outmail box is free or not
* Note: Under the normal operation, it shuld NOT happen to wait.
*/
while ( wmbo->cmd != BT_MBO_FREE ) {
wait = BT_CMD_TIMEOUT_FUDGE * delaycount;
/* Enable MBO available interrupt */
outb(BT_CMD_DATA_PORT,BT_MBO_INTR_EN);
for (i=0; i< wait; i++)
{
if (!(inb(BT_CTRL_STAT_PORT) & BT_CDF))
break;
}
if (i >= wait)
{
printf("bt%d: bt_send_mbo, cmd/data port full\n",unit);
outb(BT_CTRL_STAT_PORT, BT_SRST);
return( (BT_MBO *)0 );
}
outb(BT_CMD_DATA_PORT, 0x01); /* Enable */
sleep( wmbx, PRIBIO);
}
/* Link CCB to the Mail Box */
wmbo->ccb_addr = KVTOPHYS(ccb);
ccb->mbx = wmbo;
wmbo->cmd = cmd;
/* Send it ! */
outb(BT_CMD_DATA_PORT, BT_START_SCSI);
if (!(flags & SCSI_NOMASK))
splx(opri);
return(wmbo);
}
/***********************************************\
* We have a ccb which has been processed by the *
* adaptor, now we look to see how the operation *
* went. Wake up the owner if waiting *
\***********************************************/
bt_done(unit,ccb)
struct bt_ccb *ccb;
{
struct scsi_sense_data *s1,*s2;
struct scsi_xfer *xs = ccb->xfer;
#ifdef UTEST
if(scsi_debug & (PRINTROUTINES | TRACEINTERRUPTS))
printf("bt_done ");
#endif
/***********************************************\
* Otherwise, put the results of the operation *
* into the xfer and call whoever started it *
\***********************************************/
if ( ( ccb->host_stat != BT_OK
|| ccb->target_stat != SCSI_OK)
&& (!(xs->flags & SCSI_ERR_OK)))
{
s1 = &(ccb->scsi_sense);
s2 = &(xs->sense);
if(ccb->host_stat)
{
switch(ccb->host_stat)
{
case BT_ABORTED: /* No response */
case BT_SEL_TIMEOUT: /* No response */
#ifdef UTEST
if (bt_debug & BT_SHOWMISC)
{
printf("timeout reported back\n");
}
#endif
xs->error = XS_TIMEOUT;
break;
default: /* Other scsi protocol messes */
xs->error = XS_DRIVER_STUFFUP;
#ifdef UTEST
if (bt_debug & BT_SHOWMISC)
{
printf("unexpected host_stat: %x\n",
ccb->host_stat);
}
#endif
}
}
else
{
switch(ccb->target_stat)
{
case 0x02:
/* structure copy!!!!!*/
*s2=*s1;
xs->error = XS_SENSE;
break;
case 0x08:
xs->error = XS_BUSY;
break;
default:
#ifdef UTEST
if (bt_debug & BT_SHOWMISC)
{
printf("unexpected target_stat: %x\n",
ccb->target_stat);
}
#endif
xs->error = XS_DRIVER_STUFFUP;
}
}
}
else /* All went correctly OR errors expected */
{
xs->resid = 0;
}
xs->flags |= ITSDONE;
bt_free_ccb(unit,ccb, xs->flags);
if(xs->when_done)
(*(xs->when_done))(xs->done_arg,xs->done_arg2);
}
/***********************************************\
* Start the board, ready for normal operation *
\***********************************************/
bt_init(unit)
int unit;
{
unsigned char ad[4];
volatile int i,sts;
struct bt_config conf;
/***********************************************\
* reset board, If it doesn't respond, assume *
* that it's not there.. good for the probe *
\***********************************************/
outb(BT_CTRL_STAT_PORT, BT_HRST|BT_SRST);
for (i=0; i < BT_RESET_TIMEOUT; i++)
{
sts = inb(BT_CTRL_STAT_PORT) ;
if ( sts == (BT_IDLE | BT_INIT))
break;
}
if (i >= BT_RESET_TIMEOUT)
{
#ifdef UTEST
if (bt_debug & BT_SHOWMISC)
printf("bt_init: No answer from bt742a board\n");
#endif
return(ENXIO);
}
/***********************************************\
* Assume we have a board at this stage *
* setup dma channel from jumpers and save int *
* level *
\***********************************************/
#ifdef __386BSD__
printf("bt%d: reading board settings, ",unit);
#else __386BSD__
printf("bt%d:",unit);
#endif __386BSD__
bt_cmd(unit,0, sizeof(conf), 0 ,&conf, BT_CONF_GET);
switch(conf.chan)
{
case EISADMA:
bt_dma[unit] = -1;
break;
case CHAN0:
outb(0x0b, 0x0c);
outb(0x0a, 0x00);
bt_dma[unit] = 0;
break;
case CHAN5:
outb(0xd6, 0xc1);
outb(0xd4, 0x01);
bt_dma[unit] = 5;
break;
case CHAN6:
outb(0xd6, 0xc2);
outb(0xd4, 0x02);
bt_dma[unit] = 6;
break;
case CHAN7:
outb(0xd6, 0xc3);
outb(0xd4, 0x03);
bt_dma[unit] = 7;
break;
default:
printf("illegal dma setting %x\n",conf.chan);
return(EIO);
}
if (bt_dma[unit] == -1)
printf("eisa dma, ");
else
printf("dma=%d, ",bt_dma[unit]);
switch(conf.intr)
{
case INT9:
bt_int[unit] = 9;
break;
case INT10:
bt_int[unit] = 10;
break;
case INT11:
bt_int[unit] = 11;
break;
case INT12:
bt_int[unit] = 12;
break;
case INT14:
bt_int[unit] = 14;
break;
case INT15:
bt_int[unit] = 15;
break;
default:
printf("illegal int setting\n");
return(EIO);
}
#ifdef __386BSD__
printf("int=%d\n",bt_int[unit]);
#else
printf("int=%d ",bt_int[unit]);
#endif __386BSD__
/* who are we on the scsi bus */
bt_scsi_dev[unit] = conf.scsi_dev;
/***********************************************\
* Initialize mail box *
\***********************************************/
*((physaddr *)ad) = KVTOPHYS(&bt_mbx[unit]);
bt_cmd(unit,5, 0, 0, 0, BT_MBX_INIT_EXTENDED
, BT_MBX_SIZE
, ad[0]
, ad[1]
, ad[2]
, ad[3]);
/***********************************************\
* Set Pointer chain null for just in case *
* Link the ccb's into a free-list W/O mbox *
* Initilize Mail Box stat to Free *
\***********************************************/
if ( bt_ccb_free[unit] != (struct bt_ccb *)0 ) {
printf("bt%d: bt_ccb_free is NOT initialized but init here\n",
unit);
bt_ccb_free[unit] = (struct bt_ccb *)0;
}
for (i=0; i < BT_CCB_SIZE; i++) {
bt_ccb[unit][i].next = bt_ccb_free[unit];
bt_ccb_free[unit] = &bt_ccb[unit][i];
bt_ccb_free[unit]->flags = CCB_FREE;
}
for (i=0; i < BT_MBX_SIZE; i++) {
bt_mbx[unit].mbo[i].cmd = BT_MBO_FREE;
bt_mbx[unit].mbi[i].stat = BT_MBI_FREE;
}
/***********************************************\
* Set up Initial mail box for round-robin *
\***********************************************/
bt_mbx[unit].tmbo = &bt_mbx[unit].mbo[0];
bt_mbx[unit].tmbi = &bt_mbx[unit].mbi[0];
bt_inquire_setup_information( unit );
/* Enable round-robin scheme - appeared at FirmWare 3.31 */
bt_cmd(unit, 1, 0, 0, 0, BT_ROUND_ROBIN, BT_ENABLE );
/***********************************************\
* Note that we are going and return (to probe) *
\***********************************************/
bt_initialized[unit]++;
return( 0 );
}
bt_inquire_setup_information( unit )
int unit;
{
struct bt_setup setup;
struct bt_boardID bID;
int i;
/* Inquire Board ID to Bt742 for FirmWare Version */
bt_cmd(unit, 0, sizeof(bID), 0, &bID, BT_INQUIRE );
printf("bt%d: version %c.%c, ",
unit, bID.firm_revision, bID.firm_version );
/* Ask setup information to Bt742 */
bt_cmd(unit, 1, sizeof(setup), 0, &setup, BT_SETUP_GET, sizeof(setup) );
if ( setup.sync_neg ) {
printf("sync, ");
} else {
printf("async, ");
}
if ( setup.parity ) {
printf("parity, ");
} else {
printf("no parity, ");
}
printf("%d mbxs, %d ccbs\n", setup.num_mbx,
sizeof(bt_ccb)/(sizeof(struct bt_ccb) * NBT) );
for ( i = 0; i < 8; i++ ) {
if( !setup.sync[i].offset &&
!setup.sync[i].period &&
!setup.sync[i].valid )
continue;
printf("bt%d: dev%02d Offset=%d,Transfer period=%d, Synchronous? %s",
unit, i,
setup.sync[i].offset, setup.sync[i].period,
setup.sync[i].valid ? "Yes" : "No" );
}
}
#ifndef min
#define min(x,y) (x < y ? x : y)
#endif min
void btminphys(bp)
struct buf *bp;
{
#ifdef MACH
#if !defined(OSF)
bp->b_flags |= B_NPAGES; /* can support scat/gather */
#endif /* defined(OSF) */
#endif MACH
if(bp->b_bcount > ((BT_NSEG-1) * PAGESIZ))
{
bp->b_bcount = ((BT_NSEG-1) * PAGESIZ);
}
}
/***********************************************\
* start a scsi operation given the command and *
* the data address. Also needs the unit, target *
* and lu *
\***********************************************/
int bt_scsi_cmd(xs)
struct scsi_xfer *xs;
{
struct scsi_sense_data *s1,*s2;
struct bt_ccb *ccb;
struct bt_scat_gath *sg;
int seg; /* scatter gather seg being worked on */
int i = 0;
int rc = 0;
int thiskv;
physaddr thisphys,nextphys;
int unit =xs->adapter;
int bytes_this_seg,bytes_this_page,datalen,flags;
struct iovec *iovp;
BT_MBO *mbo;
#ifdef UTEST
if(scsi_debug & PRINTROUTINES)
printf("bt_scsi_cmd ");
#endif
/***********************************************\
* get a ccb (mbox-out) to use. If the transfer *
* is from a buf (possibly from interrupt time) *
* then we can't allow it to sleep *
\***********************************************/
flags = xs->flags;
if(xs->bp) flags |= (SCSI_NOSLEEP); /* just to be sure */
if(flags & ITSDONE)
{
printf("bt%d: Already done?\n",unit);
xs->flags &= ~ITSDONE;
}
if(!(flags & INUSE))
{
printf("bt%d: Not in use?\n",unit);
xs->flags |= INUSE;
}
if (!(ccb = bt_get_ccb(unit,flags)))
{
xs->error = XS_DRIVER_STUFFUP;
return(TRY_AGAIN_LATER);
}
#ifdef UTEST
if(bt_debug & BT_SHOWCCBS)
printf("<start ccb(%x)>",ccb);
#endif
/***********************************************\
* Put all the arguments for the xfer in the ccb *
\***********************************************/
ccb->xfer = xs;
if(flags & SCSI_RESET)
{
ccb->opcode = BT_RESET_CCB;
}
else
{
/* can't use S/G if zero length */
ccb->opcode = (xs->datalen?
BT_INIT_SCAT_GATH_CCB
:BT_INITIATOR_CCB);
}
ccb->target = xs->targ;;
ccb->data_out = 0;
ccb->data_in = 0;
ccb->lun = xs->lu;
ccb->scsi_cmd_length = xs->cmdlen;
ccb->sense_ptr = KVTOPHYS(&(ccb->scsi_sense));
ccb->req_sense_length = sizeof(ccb->scsi_sense);
if((xs->datalen) && (!(flags & SCSI_RESET)))
{ /* can use S/G only if not zero length */
ccb->data_addr = KVTOPHYS(ccb->scat_gath);
sg = ccb->scat_gath ;
seg = 0;
if(flags & SCSI_DATA_UIO)
{
iovp = ((struct uio *)xs->data)->uio_iov;
datalen = ((struct uio *)xs->data)->uio_iovcnt;
xs->datalen = 0;
while ((datalen) && (seg < BT_NSEG))
{
sg->seg_addr = (physaddr)iovp->iov_base;
xs->datalen += sg->seg_len = iovp->iov_len;
#ifdef UTEST
if(scsi_debug & SHOWSCATGATH)
printf("(0x%x@0x%x)"
,iovp->iov_len
,iovp->iov_base);
#endif
sg++;
iovp++;
seg++;
datalen--;
}
}
else
{
/***********************************************\
* Set up the scatter gather block *
\***********************************************/
#ifdef UTEST
if(scsi_debug & SHOWSCATGATH)
printf("%d @0x%x:- ",xs->datalen,xs->data);
#endif
datalen = xs->datalen;
thiskv = (int)xs->data;
thisphys = KVTOPHYS(thiskv);
while ((datalen) && (seg < BT_NSEG))
{
bytes_this_seg = 0;
/* put in the base address */
sg->seg_addr = thisphys;
#ifdef UTEST
if(scsi_debug & SHOWSCATGATH)
printf("0x%x",thisphys);
#endif
/* do it at least once */
nextphys = thisphys;
while ((datalen) && (thisphys == nextphys))
/*********************************************\
* This page is contiguous (physically) with *
* the the last, just extend the length *
\*********************************************/
{
/* how far to the end of the page */
nextphys= (thisphys & (~(PAGESIZ - 1)))
+ PAGESIZ;
bytes_this_page = nextphys - thisphys;
/**** or the data ****/
bytes_this_page = min(bytes_this_page
,datalen);
bytes_this_seg += bytes_this_page;
datalen -= bytes_this_page;
/* get more ready for the next page */
thiskv = (thiskv & (~(PAGESIZ - 1)))
+ PAGESIZ;
if(datalen)
thisphys = KVTOPHYS(thiskv);
}
/********************************************\
* next page isn't contiguous, finish the seg *
\********************************************/
#ifdef UTEST
if(scsi_debug & SHOWSCATGATH)
printf("(0x%x)",bytes_this_seg);
#endif
sg->seg_len = bytes_this_seg;
sg++;
seg++;
}
} /*end of iov/kv decision */
ccb->data_length = seg * sizeof(struct bt_scat_gath);
#ifdef UTEST
if(scsi_debug & SHOWSCATGATH)
printf("\n");
#endif
if (datalen)
{ /* there's still data, must have run out of segs! */
printf("bt%d: bt_scsi_cmd, more than %d DMA segs\n",
unit,BT_NSEG);
xs->error = XS_DRIVER_STUFFUP;
bt_free_ccb(unit,ccb,flags);
return(HAD_ERROR);
}
}
else
{ /* No data xfer, use non S/G values */
ccb->data_addr = (physaddr)0;
ccb->data_length = 0;
}
ccb->link_id = 0;
ccb->link_addr = (physaddr)0;
/***********************************************\
* Put the scsi command in the ccb and start it *
\***********************************************/
if(!(flags & SCSI_RESET))
{
bcopy(xs->cmd, ccb->scsi_cmd, ccb->scsi_cmd_length);
}
#ifdef UTEST
if(scsi_debug & SHOWCOMMANDS)
{
u_char *b = ccb->scsi_cmd;
if(!(flags & SCSI_RESET))
{
int i = 0;
printf("bt%d:%d:%d-"
,unit
,ccb->target
,ccb->lun);
while(i < ccb->scsi_cmd_length )
{
if(i) printf(",");
printf("%x",b[i++]);
}
printf("-\n");
}
else
{
printf("bt%d:%d:%d-RESET- "
,unit
,ccb->target
,ccb->lun
);
}
}
#endif
if ( bt_send_mbo( unit, flags, BT_MBO_START, ccb ) == (BT_MBO *)0 )
{
xs->error = XS_DRIVER_STUFFUP;
bt_free_ccb(unit,ccb,flags);
return(TRY_AGAIN_LATER);
}
/***********************************************\
* Usually return SUCCESSFULLY QUEUED *
\***********************************************/
#ifdef UTEST
if(scsi_debug & TRACEINTERRUPTS)
printf("cmd_sent ");
#endif
if (!(flags & SCSI_NOMASK))
{
timeout(bt_timeout,ccb,(xs->timeout * hz) / 1000);
return(SUCCESSFULLY_QUEUED);
} else
/***********************************************\
* If we can't use interrupts, poll on completion*
\***********************************************/
{
int done = 0;
int count = delaycount * xs->timeout / BT_SCSI_TIMEOUT_FUDGE;
struct bt_mbx *wmbx = &bt_mbx[unit];
BT_MBI *wmbi = wmbx->tmbi;
unsigned char stat;
#ifdef UTEST
if(scsi_debug & TRACEINTERRUPTS)
printf("wait ");
#endif
while((!done) && count)
{
stat = inb(BT_INTR_PORT) & (BT_ANY_INTR | BT_MBIF );
if ( !( stat & BT_ANY_INTR ) ||
( wmbi->stat == BT_MBI_FREE )||
(PHYSTOKV(wmbi->ccb_addr)
!= (int)ccb ) ) {
count--;
continue;
}
wmbi->stat = BT_MBI_FREE;
bt_done(unit,ccb);
done ++;
outb(BT_CTRL_STAT_PORT, BT_IRST);
/* Set the IN mail Box pointer for next */
bt_nextmbx( wmbi, wmbx, mbi );
wmbx->tmbi = wmbi;
}
if (!count && !done)
{
#ifdef UTEST
if (!(xs->flags & SCSI_SILENT))
printf("cmd fail\n");
#endif
bt_send_mbo( unit, flags, BT_MBO_ABORT, ccb );
count = delaycount * 2000 / BT_SCSI_TIMEOUT_FUDGE;
while((!done) && count)
{
if ( !( stat & BT_ANY_INTR ) ||
( wmbi->stat == BT_MBI_FREE )||
( PHYSTOKV(wmbi->ccb_addr )
!= (int)ccb ) ) {
count--;
continue;
}
wmbi->stat = BT_MBI_FREE;
bt_done(unit,ccb);
done ++;
outb(BT_CTRL_STAT_PORT, BT_IRST);
/* Set the IN mail Box pointer for next */
bt_nextmbx( wmbi, wmbx, mbi );
wmbx->tmbi = wmbi;
}
if(!count && !done)
{
printf("bt%d: abort failed in wait\n", unit);
ccb->mbx->cmd = BT_MBO_FREE;
}
bt_free_ccb(unit,ccb,flags);
xs->error = XS_DRIVER_STUFFUP;
return(HAD_ERROR);
}
if(xs->error) return(HAD_ERROR);
return(COMPLETE);
}
}
bt_timeout(struct bt_ccb *ccb)
{
int unit;
int s = splbio();
unit = ccb->xfer->adapter;
printf("bt%d: %d device timed out\n",unit
,ccb->xfer->targ);
#ifdef UTEST
if(bt_debug & BT_SHOWCCBS)
bt_print_active_ccbs(unit);
#endif
/***************************************\
* If The ccb's mbx is not free, then *
* the board has gone Far East ? *
\***************************************/
if((struct bt_ccb *)PHYSTOKV(ccb->mbx->ccb_addr)==ccb &&
ccb->mbx->cmd != BT_MBO_FREE )
{
printf("bt%d: not taking commands!\n"
,unit);
Debugger();
}
/***************************************\
* If it has been through before, then *
* a previous abort has failed, don't *
* try abort again *
\***************************************/
if(ccb->flags == CCB_ABORTED) /* abort timed out */
{
printf("bt%d: Abort Operation has timed out\n",unit);
ccb->xfer->retries = 0; /* I MEAN IT ! */
ccb->host_stat = BT_ABORTED;
bt_done(unit,ccb);
}
else /* abort the operation that has timed out */
{
printf("bt%d: Try to abort\n",unit);
bt_send_mbo( unit, ~SCSI_NOMASK,
BT_MBO_ABORT, ccb );
/* 2 secs for the abort */
timeout(bt_timeout,ccb,2 * hz);
ccb->flags = CCB_ABORTED;
}
splx(s);
}
#ifdef UTEST
bt_print_ccb(ccb)
struct bt_ccb *ccb;
{
printf("ccb:%x op:%x cmdlen:%d senlen:%d\n"
,ccb
,ccb->opcode
,ccb->scsi_cmd_length
,ccb->req_sense_length);
printf(" datlen:%d hstat:%x tstat:%x flags:%x\n"
,ccb->data_length
,ccb->host_stat
,ccb->target_stat
,ccb->flags);
}
bt_print_active_ccbs(int unit)
{
struct bt_ccb *ccb;
ccb = &(bt_ccb[unit][0]);
int i = BT_CCB_SIZE;
while(i--)
{
if(ccb->flags != CCB_FREE)
bt_print_ccb(ccb);
ccb++;
}
}
#endif /*UTEST*/
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.