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NetBSD/sys/dev/isa/bt742a.c

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/*
* Copyright (c) 1994 Charles Hannum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: bt742a.c,v 1.26 1994/05/05 05:36:28 cgd Exp $
*/
/*
* Originally 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.
*/
/*
* bt742a SCSI driver
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <machine/pio.h>
#include <i386/isa/isavar.h>
#include <i386/isa/icu.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#ifdef DDB
int Debugger();
#else /* DDB */
#define Debugger()
#endif /* DDB */
typedef u_long physaddr;
/*
* I/O Port Interface
*/
#define BT_BASE bt->bt_base
#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 etc.
* these could be bigger but we need the bt_softc to fit on a single page..
*/
#define BT_MBX_SIZE 16 /* mail box size (MAX 255 MBxs) */
/* don't need that many really */
#define BT_CCB_MAX 32 /* store up to 32CCBs at any one time */
/* in bt742a H/W ( Not MAX ? ) */
#define CCB_HASH_SIZE 32 /* when we have a physical addr. for */
/* a ccb and need to find the ccb in */
/* space, look it up in the hash table */
#define CCB_HASH_SHIFT 9 /* only hash on multiples of 512 */
#define CCB_HASH(x) ((((long int)(x))>>CCB_HASH_SHIFT) % CCB_HASH_SIZE)
#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;
u_char dummy[3];
u_char cmd;
} BT_MBO;
typedef struct bt_mbx_in {
physaddr ccb_addr;
u_char btstat;
u_char sdstat;
u_char dummy;
u_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 */
/*
* mbi.stat values
*/
#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 */
#if defined(BIG_DMA)
WARNING...THIS WON'T WORK(won't fit on 1 page)
/* #define BT_NSEG 2048 /* Number of scatter gather segments - to much vm */
#define BT_NSEG 128
#else
#define BT_NSEG 33
#endif /* BIG_DMA */
struct bt_scat_gath {
u_long seg_len;
physaddr seg_addr;
};
struct bt_ccb {
u_char opcode;
u_char:3, data_in:1, data_out:1,:3;
u_char scsi_cmd_length;
u_char req_sense_length;
/*------------------------------------longword boundary */
u_long data_length;
/*------------------------------------longword boundary */
physaddr data_addr;
/*------------------------------------longword boundary */
u_char dummy[2];
u_char host_stat;
u_char target_stat;
/*------------------------------------longword boundary */
u_char target;
u_char lun;
u_char scsi_cmd[12]; /* 12 bytes (bytes only) */
u_char dummy2[1];
u_char link_id;
/*------------------------------------4 longword boundary */
physaddr link_addr;
/*------------------------------------longword boundary */
physaddr sense_ptr;
/*-----end of HW fields-------------------------------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
/*------------------------------------longword boundary */
struct bt_ccb *nexthash; /* if two hash the same */
/*------------------------------------longword boundary */
physaddr hashkey; /*physaddr of this ccb */
/*------------------------------------longword boundary */
};
/*
* 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]; /*XXX */
/* doesn't make sense with 32bit addresses */
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
#define KVTOPHYS(x) vtophys(x)
struct bt_softc {
struct device sc_dev;
struct isadev sc_id;
struct intrhand sc_ih;
u_short bt_base; /* base port for each board */
struct bt_mbx bt_mbx; /* all our mailboxes */
struct bt_ccb *bt_ccb_free; /* list of free CCBs */
struct bt_ccb *ccbhash[CCB_HASH_SIZE]; /* phys to kv hash */
int bt_int; /* int. read off board */
int bt_dma; /* DMA channel read of board */
int bt_scsi_dev; /* adapters scsi id */
int numccbs; /* how many we have malloc'd */
struct scsi_link sc_link; /* prototype for devs */
};
/***********debug values *************/
#define BT_SHOWCCBS 0x01
#define BT_SHOWINTS 0x02
#define BT_SHOWCMDS 0x04
#define BT_SHOWMISC 0x08
int bt_debug = 0;
int bt_cmd(); /* XXX must be varargs to prototype */
u_int bt_adapter_info __P((struct bt_softc *));
int btintr __P((struct bt_softc *));
void bt_free_ccb __P((struct bt_softc *, struct bt_ccb *, int));
struct bt_ccb *bt_get_ccb __P((struct bt_softc *, int));
struct bt_ccb *bt_ccb_phys_kv __P((struct bt_softc *, physaddr));
BT_MBO *bt_send_mbo __P((struct bt_softc *, int, int, struct bt_ccb *));
void bt_done __P((struct bt_softc *, struct bt_ccb *));
int bt_find __P((struct bt_softc *));
void bt_init __P((struct bt_softc *));
void bt_inquire_setup_information __P((struct bt_softc *));
void btminphys __P((struct buf *));
int bt_scsi_cmd __P((struct scsi_xfer *));
int bt_poll __P((struct bt_softc *, struct scsi_xfer *, struct bt_ccb *));
void bt_timeout __P((void *arg));
#ifdef UTEST
void bt_print_ccb __P((struct bt_ccb *));
void bt_print_active_ccbs __P((struct bt_softc *));
#endif
struct scsi_adapter bt_switch = {
bt_scsi_cmd,
btminphys,
0,
0,
bt_adapter_info,
"bt"
};
/* the below structure is so we have a default dev struct for out link struct */
struct scsi_device bt_dev = {
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
"bt",
0
};
int btprobe();
void btattach();
struct cfdriver btcd = {
NULL, "bt", btprobe, btattach, DV_DULL, sizeof(struct bt_softc)
};
#define BT_RESET_TIMEOUT 1000
/*
* bt_cmd(bt, 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.
*/
int
bt_cmd(bt, icnt, ocnt, wait, retval, opcode, args)
struct bt_softc *bt;
int icnt, ocnt, wait;
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 *= 100000;
else
wait = 100000;
/*
* 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 = 100000; /* 1 sec? */
while (--i) {
sts = inb(BT_CTRL_STAT_PORT);
if (sts & BT_IDLE) {
break;
}
delay(10);
}
if (!i) {
printf("%s: bt_cmd, host not idle(0x%x)\n",
bt->sc_dev.dv_xname, 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 = wait; i; i--) {
sts = inb(BT_CTRL_STAT_PORT);
if (!(sts & BT_CDF))
break;
delay(10);
}
if (!i) {
printf("%s: bt_cmd, cmd/data port full\n",
bt->sc_dev.dv_xname);
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 = wait; i; i--) {
sts = inb(BT_CTRL_STAT_PORT);
if (sts & BT_DF)
break;
delay(10);
}
if (!i) {
printf("bt%d: bt_cmd, cmd/data port empty %d\n",
bt->sc_dev.dv_xname, ocnt);
return ENXIO;
}
oc = inb(BT_CMD_DATA_PORT);
if (retval)
*retval++ = oc;
}
/*
* Wait for the board to report a finised instruction
*/
i = 100000; /* 1 sec? */
while (--i) {
sts = inb(BT_INTR_PORT);
if (sts & BT_HACC)
break;
delay(10);
}
if (!i) {
printf("%s: bt_cmd, host not finished(0x%x)\n",
bt->sc_dev.dv_xname, 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_device structure from
* autoconf.c
*/
int
btprobe(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct bt_softc *bt = (void *)self;
register struct isa_attach_args *ia = aux;
#ifdef NEWCONFIG
if (ia->ia_iobase == IOBASEUNK)
return 0;
#endif
bt->bt_base = ia->ia_iobase;
/*
* Try initialise a unit at this location
* sets up dma and bus speed, loads bt->bt_int
*/
if (bt_find(bt) != 0)
return 0;
#ifdef NEWCONFIG
/*
* If it's there, put in it's interrupt vectors and dma channel
*/
if (ia->ia_irq == IRQUNK) {
ia->ia_irq = (1 << bt->bt_int);
} else {
if (ia->ia_irq != (1 << bt->bt_int)) {
printf("bt%d: irq mismatch, %x != %x\n",
bt->sc_dev.dv_unit, ia->ia_irq,
1 << bt->bt_int);
return 0;
}
}
if (ia->ia_drq == DRQUNK) {
ia->ia_drq = bt->bt_dma;
} else {
if (ia->ia_drq != bt->bt_dma) {
printf("bt%d: drq mismatch, %x != %x\n",
bt->sc_dev.dv_unit, ia->ia_drq, bt->bt_dma);
return 0;
}
}
#endif
ia->ia_msize = 0;
ia->ia_iosize = 4;
return 1;
}
btprint()
{
}
/*
* Attach all the sub-devices we can find
*/
void
btattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct isa_attach_args *ia = aux;
struct bt_softc *bt = (void *)self;
bt_init(bt);
/*
* fill in the prototype scsi_link.
*/
bt->sc_link.adapter_softc = bt;
bt->sc_link.adapter_targ = bt->bt_scsi_dev;
bt->sc_link.adapter = &bt_switch;
bt->sc_link.device = &bt_dev;
printf("\n");
#ifdef NEWCONFIG
isa_establish(&bt->sc_id, &bt->sc_dev);
#endif
bt->sc_ih.ih_fun = btintr;
bt->sc_ih.ih_arg = bt;
bt->sc_ih.ih_level = IPL_BIO;
intr_establish(ia->ia_irq, &bt->sc_ih);
/*
* ask the adapter what subunits are present
*/
config_found(self, &bt->sc_link, btprint);
}
/*
* Return some information to the caller about the adapter and its
* capabilities.
*/
u_int
bt_adapter_info(bt)
struct bt_softc *bt;
{
return 2; /* 2 outstanding requests at a time per device */
}
/*
* Catch an interrupt from the adaptor
*/
int
btintr(bt)
struct bt_softc *bt;
{
BT_MBI *wmbi;
struct bt_mbx *wmbx;
struct bt_ccb *ccb;
u_char stat;
int i, wait;
int found = 0;
#ifdef UTEST
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("%s: Available Free mbo post\n", bt->sc_dev.dv_xname);
/* Disable MBO available interrupt */
outb(BT_CMD_DATA_PORT, BT_MBO_INTR_EN);
wait = 100000; /* 1 sec enough? */
for (i = wait; i; i--) {
if (!(inb(BT_CTRL_STAT_PORT) & BT_CDF))
break;
delay(10);
}
if (!i) {
printf("%s: btintr, cmd/data port full\n",
bt->sc_dev.dv_xname);
outb(BT_CTRL_STAT_PORT, BT_SRST);
return 1;
}
outb(BT_CMD_DATA_PORT, 0x00); /* Disable */
wakeup((caddr_t)&bt->bt_mbx);
outb(BT_CTRL_STAT_PORT, BT_IRST);
return 1;
}
if (!(stat & BT_MBIF)) {
outb(BT_CTRL_STAT_PORT, BT_IRST);
return -1; /* XXX */
}
/*
* If it IS then process the competed operation
*/
wmbx = &bt->bt_mbx;
wmbi = wmbx->tmbi;
AGAIN:
while (wmbi->stat != BT_MBI_FREE) {
ccb = bt_ccb_phys_kv(bt, (wmbi->ccb_addr));
if (!ccb) {
wmbi->stat = BT_MBI_FREE;
printf("bt: BAD CCB ADDR!\n");
continue;
}
found++;
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(bt, 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("%s: mbi at 0x%08x should be found, stat=%02x..resync\n",
bt->sc_dev.dv_xname, wmbi, stat);
} else {
found = 0;
goto AGAIN;
}
}
wmbx->tmbi = wmbi;
outb(BT_CTRL_STAT_PORT, BT_IRST);
return 1;
}
/*
* A ccb is put onto the free list.
*/
void
bt_free_ccb(bt, ccb, flags)
struct bt_softc *bt;
struct bt_ccb *ccb;
int flags;
{
int opri;
if (!(flags & SCSI_NOMASK))
opri = splbio();
ccb->next = bt->bt_ccb_free;
bt->bt_ccb_free = ccb;
ccb->flags = CCB_FREE;
/*
* If there were none, wake anybody waiting for one to come free,
* starting with queued entries.
*/
if (!ccb->next)
wakeup((caddr_t)&bt->bt_ccb_free);
if (!(flags & SCSI_NOMASK))
splx(opri);
}
/*
* Get a free ccb
*
* If there are none, see if we can allocate a new one. If so, put it in
* the hash table too otherwise either return an error or sleep.
*/
struct bt_ccb *
bt_get_ccb(bt, flags)
struct bt_softc *bt;
int flags;
{
int opri;
struct bt_ccb *ccbp;
struct bt_mbx *wmbx; /* Mail Box pointer specified unit */
BT_MBO *wmbo; /* Out Mail Box pointer */
int hashnum;
if (!(flags & SCSI_NOMASK))
opri = splbio();
/*
* If we can and have to, sleep waiting for one to come free
* but only if we can't allocate a new one.
*/
while (!(ccbp = bt->bt_ccb_free)) {
if (bt->numccbs < BT_CCB_MAX) {
if (ccbp = (struct bt_ccb *) malloc(sizeof(struct bt_ccb),
M_TEMP,
M_NOWAIT)) {
bzero(ccbp, sizeof(struct bt_ccb));
bt->numccbs++;
ccbp->flags = CCB_ACTIVE;
/*
* put in the phystokv hash table
* Never gets taken out.
*/
ccbp->hashkey = KVTOPHYS(ccbp);
hashnum = CCB_HASH(ccbp->hashkey);
ccbp->nexthash = bt->ccbhash[hashnum];
bt->ccbhash[hashnum] = ccbp;
} else {
printf("%s: Can't malloc CCB\n",
bt->sc_dev.dv_xname);
}
goto gottit;
} else {
if (!(flags & SCSI_NOSLEEP)) {
tsleep((caddr_t)&bt->bt_ccb_free, PRIBIO,
"btccb", 0);
}
}
}
if (ccbp) {
/* Get CCB from from free list */
bt->bt_ccb_free = ccbp->next;
ccbp->flags = CCB_ACTIVE;
}
gottit:
if (!(flags & SCSI_NOMASK))
splx(opri);
return ccbp;
}
/*
* given a physical address, find the ccb that
* it corresponds to:
*/
struct bt_ccb *
bt_ccb_phys_kv(bt, ccb_phys)
struct bt_softc *bt;
physaddr ccb_phys;
{
int hashnum = CCB_HASH(ccb_phys);
struct bt_ccb *ccbp = bt->ccbhash[hashnum];
while (ccbp) {
if (ccbp->hashkey == ccb_phys)
break;
ccbp = ccbp->nexthash;
}
return ccbp;
}
/*
* Get a MBO and then Send it
*/
BT_MBO *
bt_send_mbo(bt, flags, cmd, ccb)
struct bt_softc *bt;
int flags, cmd;
struct bt_ccb *ccb;
{
int opri;
BT_MBO *wmbo; /* Mail Box Out pointer */
struct bt_mbx *wmbx; /* Mail Box pointer specified unit */
int i, wait;
wmbx = &bt->bt_mbx;
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 = 100000; /* 1 sec enough? */
/* Enable MBO available interrupt */
outb(BT_CMD_DATA_PORT, BT_MBO_INTR_EN);
for (i = wait; i; i--) {
if (!(inb(BT_CTRL_STAT_PORT) & BT_CDF))
break;
delay(10);
}
if (!i) {
printf("%s: bt_send_mbo, cmd/data port full\n",
bt->sc_dev.dv_xname);
outb(BT_CTRL_STAT_PORT, BT_SRST);
return NULL;
}
outb(BT_CMD_DATA_PORT, 0x01); /* Enable */
tsleep((caddr_t)wmbx, PRIBIO, "btsnd", 0);/*XXX can't do this */
/* May be servicing an int */
}
/* 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
*/
void
bt_done(bt, ccb)
struct bt_softc *bt;
struct bt_ccb *ccb;
{
struct scsi_sense_data *s1, *s2;
struct scsi_xfer *xs = ccb->xfer;
SC_DEBUG(xs->sc_link, SDEV_DB2, ("bt_done\n"));
/*
* 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 */
SC_DEBUG(xs->sc_link, SDEV_DB3,
("timeout reported back\n"));
xs->error = XS_TIMEOUT;
break;
default: /* Other scsi protocol messes */
xs->error = XS_DRIVER_STUFFUP;
SC_DEBUG(xs->sc_link, SDEV_DB3,
("unexpected host_stat: %x\n",
ccb->host_stat));
}
} else {
switch (ccb->target_stat) {
case 0x02:
*s2 = *s1;
xs->error = XS_SENSE;
break;
case 0x08:
xs->error = XS_BUSY;
break;
default:
SC_DEBUG(xs->sc_link, SDEV_DB3,
("unexpected target_stat: %x\n",
ccb->target_stat));
xs->error = XS_DRIVER_STUFFUP;
}
}
} else { /* All went correctly OR errors expected */
xs->resid = 0;
}
xs->flags |= ITSDONE;
bt_free_ccb(bt, ccb, xs->flags);
scsi_done(xs);
}
/*
* Find the board and find it's irq/drq
*/
int
bt_find(bt)
struct bt_softc *bt;
{
u_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 = BT_RESET_TIMEOUT; i; i--) {
sts = inb(BT_CTRL_STAT_PORT);
if (sts == (BT_IDLE | BT_INIT))
break;
delay(1000);
}
if (!i) {
#ifdef UTEST
printf("bt_find: 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
*/
delay(1000);
bt_cmd(bt, 0, sizeof(conf), 0, &conf, BT_CONF_GET);
switch (conf.chan) {
case EISADMA:
bt->bt_dma = -1;
break;
case CHAN0:
outb(0x0b, 0x0c);
outb(0x0a, 0x00);
bt->bt_dma = 0;
break;
case CHAN5:
outb(0xd6, 0xc1);
outb(0xd4, 0x01);
bt->bt_dma = 5;
break;
case CHAN6:
outb(0xd6, 0xc2);
outb(0xd4, 0x02);
bt->bt_dma = 6;
break;
case CHAN7:
outb(0xd6, 0xc3);
outb(0xd4, 0x03);
bt->bt_dma = 7;
break;
default:
printf("illegal dma setting %x\n", conf.chan);
return EIO;
}
switch (conf.intr) {
case INT9:
bt->bt_int = 9;
break;
case INT10:
bt->bt_int = 10;
break;
case INT11:
bt->bt_int = 11;
break;
case INT12:
bt->bt_int = 12;
break;
case INT14:
bt->bt_int = 14;
break;
case INT15:
bt->bt_int = 15;
break;
default:
printf("illegal int setting %x\n", conf.intr);
return EIO;
}
/* who are we on the scsi bus? */
bt->bt_scsi_dev = conf.scsi_dev;
return 0;
}
/*
* Start the board, ready for normal operation
*/
void
bt_init(bt)
struct bt_softc *bt;
{
u_char ad[4];
volatile int i;
/*
* Initialize mail box
*/
*((physaddr *) ad) = KVTOPHYS(&bt->bt_mbx);
bt_cmd(bt, 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
* Initialize mail box status to free
*/
if (bt->bt_ccb_free) {
printf("%s: bt_ccb_free is NOT initialized but init here\n",
bt->sc_dev.dv_xname);
bt->bt_ccb_free = NULL;
}
for (i = 0; i < BT_MBX_SIZE; i++) {
bt->bt_mbx.mbo[i].cmd = BT_MBO_FREE;
bt->bt_mbx.mbi[i].stat = BT_MBI_FREE;
}
/*
* Set up initial mail box for round-robin operation.
*/
bt->bt_mbx.tmbo = &bt->bt_mbx.mbo[0];
bt->bt_mbx.tmbi = &bt->bt_mbx.mbi[0];
bt_inquire_setup_information(bt);
/* Enable round-robin scheme - appeared at firmware rev. 3.31 */
bt_cmd(bt, 1, 0, 0, 0, BT_ROUND_ROBIN, BT_ENABLE);
}
void
bt_inquire_setup_information(bt)
struct bt_softc *bt;
{
struct bt_setup setup;
struct bt_boardID bID;
int i;
/* Inquire Board ID to Bt742 for firmware version */
bt_cmd(bt, 0, sizeof(bID), 0, &bID, BT_INQUIRE);
printf(": version %c.%c, ", bID.firm_revision, bID.firm_version);
/* Obtain setup information from Bt742. */
bt_cmd(bt, 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", setup.num_mbx);
for (i = 0; i < 8; i++) {
if (!setup.sync[i].offset &&
!setup.sync[i].period &&
!setup.sync[i].valid)
continue;
printf("%s: dev%02d Offset=%d, Transfer period=%d, Synchronous? %s",
bt->sc_dev.dv_xname, i,
setup.sync[i].offset, setup.sync[i].period,
setup.sync[i].valid ? "Yes" : "No");
}
}
void
btminphys(bp)
struct buf *bp;
{
if (bp->b_bcount > ((BT_NSEG - 1) << PGSHIFT))
bp->b_bcount = ((BT_NSEG - 1) << PGSHIFT);
}
/*
* 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_link *sc_link = xs->sc_link;
struct bt_softc *bt = sc_link->adapter_softc;
struct bt_ccb *ccb;
struct bt_scat_gath *sg;
int seg; /* scatter gather seg being worked on */
int thiskv;
physaddr thisphys, nextphys;
int bytes_this_seg, bytes_this_page, datalen, flags;
struct iovec *iovp;
BT_MBO *mbo;
SC_DEBUG(sc_link, SDEV_DB2, ("bt_scsi_cmd\n"));
/*
* 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("%s: Already done?\n", bt->sc_dev.dv_xname);
xs->flags &= ~ITSDONE;
}
if (!(flags & INUSE)) {
printf("%s: Not in use?\n", bt->sc_dev.dv_xname);
xs->flags |= INUSE;
}
if (!(ccb = bt_get_ccb(bt, flags))) {
xs->error = XS_DRIVER_STUFFUP;
return TRY_AGAIN_LATER;
}
SC_DEBUG(sc_link, SDEV_DB3,
("start ccb(%x)\n", ccb));
/*
* 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 = sc_link->target;
ccb->data_out = 0;
ccb->data_in = 0;
ccb->lun = sc_link->lun;
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))) {
ccb->data_addr = KVTOPHYS(ccb->scat_gath);
sg = ccb->scat_gath;
seg = 0;
#ifdef TFS
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;
SC_DEBUGN(sc_link, SDEV_DB4, ("(0x%x@0x%x)",
iovp->iov_len, iovp->iov_base));
sg++;
iovp++;
seg++;
datalen--;
}
} else
#endif /* TFS */
{
/*
* Set up the scatter gather block
*/
SC_DEBUG(sc_link, SDEV_DB4,
("%d @0x%x:- ", xs->datalen, xs->data));
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;
SC_DEBUGN(sc_link, SDEV_DB4,
("0x%x", thisphys));
/* 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 & ~PGOFSET) + NBPG;
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 & ~PGOFSET) + NBPG;
if (datalen)
thisphys = KVTOPHYS(thiskv);
}
/*
* next page isn't contiguous, finish the seg
*/
SC_DEBUGN(sc_link, SDEV_DB4,
("(0x%x)", bytes_this_seg));
sg->seg_len = bytes_this_seg;
sg++;
seg++;
}
}
/* end of iov/kv decision */
ccb->data_length = seg * sizeof(struct bt_scat_gath);
SC_DEBUGN(sc_link, SDEV_DB4, ("\n"));
if (datalen) {
/*
* there's still data, must have run out of segs!
*/
printf("%s: bt_scsi_cmd, more than %d DMA segs\n",
bt->sc_dev.dv_xname, BT_NSEG);
xs->error = XS_DRIVER_STUFFUP;
bt_free_ccb(bt, 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);
if (bt_send_mbo(bt, flags, BT_MBO_START, ccb) == (BT_MBO *) 0) {
xs->error = XS_DRIVER_STUFFUP;
bt_free_ccb(bt, ccb, flags);
return TRY_AGAIN_LATER;
}
/*
* Usually return SUCCESSFULLY QUEUED
*/
SC_DEBUG(sc_link, SDEV_DB3, ("cmd_sent\n"));
if (!(flags & SCSI_NOMASK)) {
timeout(bt_timeout, ccb, (xs->timeout * hz) / 1000);
return SUCCESSFULLY_QUEUED;
}
/*
* If we can't use interrupts, poll on completion
*/
return bt_poll(bt, xs, ccb);
}
/*
* Poll a particular unit, looking for a particular xs
*/
int
bt_poll(bt, xs, ccb)
struct bt_softc *bt;
struct scsi_xfer *xs;
struct bt_ccb *ccb;
{
int done = 0;
int count = xs->timeout;
u_char stat;
/* timeouts are in msec, so we loop in 1000 usec cycles */
while (count) {
/*
* If we had interrupts enabled, would we
* have got an interrupt?
*/
stat = inb(BT_INTR_PORT);
if (stat & BT_ANY_INTR)
btintr(bt);
if (xs->flags & ITSDONE)
break;
delay(1000); /* only happens in boot so ok */
count--;
}
if (!count) {
/*
* We timed out, so call the timeout handler manually,
* accounting for the fact that the clock is not running yet
* by taking out the clock queue entry it makes.
*/
bt_timeout((caddr_t)ccb);
/*
* because we are polling, take out the timeout entry
* bt_timeout made
*/
untimeout(bt_timeout, ccb);
count = 2000;
while (count) {
/*
* Once again, wait for the int bit
*/
stat = inb(BT_INTR_PORT);
if (stat & BT_ANY_INTR)
btintr(bt);
if (xs->flags & ITSDONE)
break;
delay(1000); /* only happens in boot so ok */
count--;
}
if (!count) {
/*
* We timed out again... This is bad. Notice that
* this time there is no clock queue entry to remove.
*/
bt_timeout((caddr_t)ccb);
}
}
if (xs->error)
return HAD_ERROR;
return COMPLETE;
}
void
bt_timeout(arg)
void *arg;
{
int s = splbio();
struct bt_ccb *ccb = (struct bt_ccb *)arg;
struct bt_softc *bt;
bt = ccb->xfer->sc_link->adapter_softc;
sc_print_addr(ccb->xfer->sc_link);
printf("timed out ");
#ifdef UTEST
bt_print_active_ccbs(bt);
#endif
/*
* If the ccb's mbx is not free, then the board has gone Far East?
*/
if (bt_ccb_phys_kv(bt, ccb->mbx->ccb_addr) == ccb &&
ccb->mbx->cmd != BT_MBO_FREE) {
printf("%s: not taking commands!\n", bt->sc_dev.dv_xname);
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("AGAIN\n");
ccb->xfer->retries = 0; /* I MEAN IT ! */
ccb->host_stat = BT_ABORTED;
bt_done(bt, ccb);
} else { /* abort the operation that has timed out */
printf("\n");
bt_send_mbo(bt, ~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
void
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);
}
void
bt_print_active_ccbs(bt)
struct bt_softc *bt;
{
struct bt_ccb *ccb;
int i = 0;
while (i < CCB_HASH_SIZE) {
ccb = bt->ccbhash[i];
while (ccb) {
if (ccb->flags != CCB_FREE)
bt_print_ccb(ccb);
ccb = ccb->nexthash;
}
i++;
}
}
#endif /*UTEST */
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