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NetBSD/sys/dev/isa/aha1542.c

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/* $NetBSD: aha1542.c,v 1.42 1995/04/17 12:08:28 cgd Exp $ */
/*
* 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.
*/
/*
* 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.
*/
/*
* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
*/
#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 <dev/isa/isavar.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#ifdef DDB
int Debugger();
#else /* !DDB */
#define Debugger() panic("should call debugger here (aha1542.c)")
#endif /* !DDB */
/************************** board definitions *******************************/
/*
* I/O Port Interface
*/
#define AHA_BASE aha->sc_iobase
#define AHA_CTRL_STAT_PORT (AHA_BASE + 0x0) /* control & status */
#define AHA_CMD_DATA_PORT (AHA_BASE + 0x1) /* cmds and datas */
#define AHA_INTR_PORT (AHA_BASE + 0x2) /* Intr. stat */
/*
* AHA_CTRL_STAT bits (write)
*/
#define AHA_HRST 0x80 /* Hardware reset */
#define AHA_SRST 0x40 /* Software reset */
#define AHA_IRST 0x20 /* Interrupt reset */
#define AHA_SCRST 0x10 /* SCSI bus reset */
/*
* AHA_CTRL_STAT bits (read)
*/
#define AHA_STST 0x80 /* Self test in Progress */
#define AHA_DIAGF 0x40 /* Diagnostic Failure */
#define AHA_INIT 0x20 /* Mbx Init required */
#define AHA_IDLE 0x10 /* Host Adapter Idle */
#define AHA_CDF 0x08 /* cmd/data out port full */
#define AHA_DF 0x04 /* Data in port full */
#define AHA_INVDCMD 0x01 /* Invalid command */
/*
* AHA_CMD_DATA bits (write)
*/
#define AHA_NOP 0x00 /* No operation */
#define AHA_MBX_INIT 0x01 /* Mbx initialization */
#define AHA_START_SCSI 0x02 /* start scsi command */
#define AHA_START_BIOS 0x03 /* start bios command */
#define AHA_INQUIRE 0x04 /* Adapter Inquiry */
#define AHA_MBO_INTR_EN 0x05 /* Enable MBO available interrupt */
#define AHA_SEL_TIMEOUT_SET 0x06 /* set selection time-out */
#define AHA_BUS_ON_TIME_SET 0x07 /* set bus-on time */
#define AHA_BUS_OFF_TIME_SET 0x08 /* set bus-off time */
#define AHA_SPEED_SET 0x09 /* set transfer speed */
#define AHA_DEV_GET 0x0a /* return installed devices */
#define AHA_CONF_GET 0x0b /* return configuration data */
#define AHA_TARGET_EN 0x0c /* enable target mode */
#define AHA_SETUP_GET 0x0d /* return setup data */
#define AHA_WRITE_CH2 0x1a /* write channel 2 buffer */
#define AHA_READ_CH2 0x1b /* read channel 2 buffer */
#define AHA_WRITE_FIFO 0x1c /* write fifo buffer */
#define AHA_READ_FIFO 0x1d /* read fifo buffer */
#define AHA_ECHO 0x1e /* Echo command data */
#define AHA_EXT_BIOS 0x28 /* return extended bios info */
#define AHA_MBX_ENABLE 0x29 /* enable mail box interface */
/*
* AHA_INTR_PORT bits (read)
*/
#define AHA_ANY_INTR 0x80 /* Any interrupt */
#define AHA_SCRD 0x08 /* SCSI reset detected */
#define AHA_HACC 0x04 /* Command complete */
#define AHA_MBOA 0x02 /* MBX out empty */
#define AHA_MBIF 0x01 /* MBX in full */
/*
* Mail box defs
*/
#define AHA_MBX_SIZE 16 /* mail box size */
#define AHA_CCB_MAX 32 /* store up to 32 CCBs at one time */
#define CCB_HASH_SIZE 32 /* hash table size for phystokv */
#define CCB_HASH_SHIFT 9
#define CCB_HASH(x) ((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
#define aha_nextmbx(wmb, mbx, mbio) \
if ((wmb) == &(mbx)->mbio[AHA_MBX_SIZE - 1]) \
(wmb) = &(mbx)->mbio[0]; \
else \
(wmb)++;
struct aha_mbx_out {
u_char cmd;
u_char ccb_addr[3];
};
struct aha_mbx_in {
u_char stat;
u_char ccb_addr[3];
};
struct aha_mbx {
struct aha_mbx_out mbo[AHA_MBX_SIZE];
struct aha_mbx_in mbi[AHA_MBX_SIZE];
struct aha_mbx_out *tmbo; /* Target Mail Box out */
struct aha_mbx_in *tmbi; /* Target Mail Box in */
};
/*
* mbo.cmd values
*/
#define AHA_MBO_FREE 0x0 /* MBO entry is free */
#define AHA_MBO_START 0x1 /* MBO activate entry */
#define AHA_MBO_ABORT 0x2 /* MBO abort entry */
/*
* mbi.stat values
*/
#define AHA_MBI_FREE 0x0 /* MBI entry is free */
#define AHA_MBI_OK 0x1 /* completed without error */
#define AHA_MBI_ABORT 0x2 /* aborted ccb */
#define AHA_MBI_UNKNOWN 0x3 /* Tried to abort invalid CCB */
#define AHA_MBI_ERROR 0x4 /* Completed with error */
/* FOR OLD VERSIONS OF THE !%$@ this may have to be 16 (yuk) */
#define AHA_NSEG 17 /* Number of scatter gather segments <= 16 */
/* allow 64 K i/o (min) */
struct aha_ccb {
u_char opcode;
u_char lun:3;
u_char data_in:1; /* must be 0 */
u_char data_out:1; /* must be 0 */
u_char target:3;
u_char scsi_cmd_length;
u_char req_sense_length;
u_char data_length[3];
u_char data_addr[3];
u_char link_addr[3];
u_char link_id;
u_char host_stat;
u_char target_stat;
u_char reserved[2];
struct scsi_generic scsi_cmd;
struct scsi_sense_data scsi_sense;
struct aha_scat_gath {
u_char seg_len[3];
u_char seg_addr[3];
} scat_gath[AHA_NSEG];
/*----------------------------------------------------------------*/
TAILQ_ENTRY(aha_ccb) chain;
struct aha_ccb *nexthash;
long hashkey;
struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
int flags;
#define CCB_FREE 0
#define CCB_ACTIVE 1
#define CCB_ABORTED 2
struct aha_mbx_out *mbx; /* pointer to mail box */
};
/*
* opcode fields
*/
#define AHA_INITIATOR_CCB 0x00 /* SCSI Initiator CCB */
#define AHA_TARGET_CCB 0x01 /* SCSI Target CCB */
#define AHA_INIT_SCAT_GATH_CCB 0x02 /* SCSI Initiator with scatter gather */
#define AHA_RESET_CCB 0x81 /* SCSI Bus reset */
/*
* aha_ccb.host_stat values
*/
#define AHA_OK 0x00 /* cmd ok */
#define AHA_LINK_OK 0x0a /* Link cmd ok */
#define AHA_LINK_IT 0x0b /* Link cmd ok + int */
#define AHA_SEL_TIMEOUT 0x11 /* Selection time out */
#define AHA_OVER_UNDER 0x12 /* Data over/under run */
#define AHA_BUS_FREE 0x13 /* Bus dropped at unexpected time */
#define AHA_INV_BUS 0x14 /* Invalid bus phase/sequence */
#define AHA_BAD_MBO 0x15 /* Incorrect MBO cmd */
#define AHA_BAD_CCB 0x16 /* Incorrect ccb opcode */
#define AHA_BAD_LINK 0x17 /* Not same values of LUN for links */
#define AHA_INV_TARGET 0x18 /* Invalid target direction */
#define AHA_CCB_DUP 0x19 /* Duplicate CCB received */
#define AHA_INV_CCB 0x1a /* Invalid CCB or segment list */
#define AHA_ABORTED 42
struct aha_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 aha_config {
u_char chan;
u_char intr;
u_char scsi_dev:3;
u_char:5;
};
struct aha_inquire {
u_char boardid; /* type of board */
/* 0x31 = AHA-1540 */
/* 0x41 = AHA-1540A/1542A/1542B */
/* 0x42 = AHA-1640 */
/* 0x43 = AHA-1542C */
/* 0x44 = AHA-1542CF */
/* 0x45 = AHA-1542CF, BIOS v2.01 */
u_char spec_opts; /* special options ID */
/* 0x41 = Board is standard model */
u_char revision_1; /* firmware revision [0-9A-Z] */
u_char revision_2; /* firmware revision [0-9A-Z] */
};
struct aha_extbios {
u_char flags; /* Bit 3 == 1 extended bios enabled */
u_char mailboxlock; /* mail box lock code to unlock it */
};
#define INT9 0x01
#define INT10 0x02
#define INT11 0x04
#define INT12 0x08
#define INT14 0x20
#define INT15 0x40
#define CHAN0 0x01
#define CHAN5 0x20
#define CHAN6 0x40
#define CHAN7 0x80
/*********************************** end of board definitions***************/
#define KVTOPHYS(x) vtophys(x)
#ifdef AHADEBUG
int aha_debug = 1;
#endif /*AHADEBUG */
struct aha_softc {
struct device sc_dev;
struct isadev sc_id;
void *sc_ih;
int sc_iobase;
int sc_irq, sc_drq;
struct aha_mbx aha_mbx; /* all the mailboxes */
struct aha_ccb *ccbhash[CCB_HASH_SIZE];
TAILQ_HEAD(, aha_ccb) free_ccb;
int numccbs;
int aha_scsi_dev; /* our scsi id */
struct scsi_link sc_link;
};
int aha_cmd(); /* XXX must be varargs to prototype */
int ahaintr __P((void *));
void aha_free_ccb __P((struct aha_softc *, struct aha_ccb *, int));
struct aha_ccb *aha_get_ccb __P((struct aha_softc *, int));
struct aha_ccb *aha_ccb_phys_kv __P((struct aha_softc *, u_long));
struct aha_mbx_out *aha_send_mbo __P((struct aha_softc *, int, struct aha_ccb *));
void aha_done __P((struct aha_softc *, struct aha_ccb *));
int aha_find __P((struct aha_softc *));
void aha_init __P((struct aha_softc *));
void ahaminphys __P((struct buf *));
int aha_scsi_cmd __P((struct scsi_xfer *));
int aha_poll __P((struct aha_softc *, struct scsi_xfer *, int));
int aha_set_bus_speed __P((struct aha_softc *));
int aha_bus_speed_check __P((struct aha_softc *, int));
void aha_timeout __P((void *arg));
struct scsi_adapter aha_switch = {
aha_scsi_cmd,
ahaminphys,
0,
0,
};
/* the below structure is so we have a default dev struct for out link struct */
struct scsi_device aha_dev = {
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
};
int ahaprobe __P((struct device *, void *, void *));
void ahaattach __P((struct device *, struct device *, void *));
struct cfdriver ahacd = {
NULL, "aha", ahaprobe, ahaattach, DV_DULL, sizeof(struct aha_softc)
};
#define AHA_RESET_TIMEOUT 2000 /* time to wait for reset (mSec) */
/*
* aha_cmd(aha,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 AHA_NOP, AHA_MBX_INIT, AHA_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 but that one is done
* separately. This is only called during set-up.
*/
int
aha_cmd(aha, icnt, ocnt, wait, retval, opcode, args)
struct aha_softc *aha;
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 sec..
* all wait loops are in 50uSec cycles
*/
if (wait)
wait *= 20000;
else
wait = 20000;
/*
* Wait for the adapter to go idle, unless it's one of
* the commands which don't need this
*/
if (opcode != AHA_MBX_INIT && opcode != AHA_START_SCSI) {
i = 20000; /*do this for upto about a second */
while (--i) {
sts = inb(AHA_CTRL_STAT_PORT);
if (sts & AHA_IDLE)
break;
delay(50);
}
if (!i) {
printf("%s: aha_cmd, host not idle(0x%x)\n",
aha->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(AHA_CTRL_STAT_PORT)) & AHA_DF)
inb(AHA_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(AHA_CTRL_STAT_PORT);
for (i = wait; i; i--) {
sts = inb(AHA_CTRL_STAT_PORT);
if (!(sts & AHA_CDF))
break;
delay(50);
}
if (!i) {
if (opcode != AHA_INQUIRE)
printf("%s: aha_cmd, cmd/data port full\n",
aha->sc_dev.dv_xname);
outb(AHA_CTRL_STAT_PORT, AHA_SRST);
return ENXIO;
}
outb(AHA_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(AHA_CTRL_STAT_PORT);
for (i = wait; i; i--) {
sts = inb(AHA_CTRL_STAT_PORT);
if (sts & AHA_DF)
break;
delay(50);
}
if (!i) {
if (opcode != AHA_INQUIRE)
printf("%s: aha_cmd, cmd/data port empty %d\n",
aha->sc_dev.dv_xname, ocnt);
outb(AHA_CTRL_STAT_PORT, AHA_SRST);
return ENXIO;
}
oc = inb(AHA_CMD_DATA_PORT);
if (retval)
*retval++ = oc;
}
/*
* Wait for the board to report a finised instruction
*/
i = 20000;
while (--i) {
sts = inb(AHA_INTR_PORT);
if (sts & AHA_HACC)
break;
delay(50);
}
if (!i) {
printf("%s: aha_cmd, host not finished(0x%x)\n",
aha->sc_dev.dv_xname, sts);
return ENXIO;
}
outb(AHA_CTRL_STAT_PORT, AHA_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
ahaprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct aha_softc *aha = match;
struct isa_attach_args *ia = aux;
#ifdef NEWCONFIG
if (ia->ia_iobase == IOBASEUNK)
return 0;
#endif
aha->sc_iobase = ia->ia_iobase;
/*
* Try initialise a unit at this location
* sets up dma and bus speed, loads aha->sc_irq
*/
if (aha_find(aha) != 0)
return 0;
if (ia->ia_irq != IRQUNK) {
if (ia->ia_irq != aha->sc_irq) {
printf("%s: irq mismatch; kernel configured %d != board configured %d\n",
aha->sc_dev.dv_xname, ia->ia_irq, aha->sc_irq);
return 0;
}
} else
ia->ia_irq = aha->sc_irq;
if (ia->ia_drq != DRQUNK) {
if (ia->ia_drq != aha->sc_drq) {
printf("%s: drq mismatch; kernel configured %d != board configured %d\n",
aha->sc_dev.dv_xname, ia->ia_drq, aha->sc_drq);
return 0;
}
} else
ia->ia_drq = aha->sc_drq;
ia->ia_msize = 0;
ia->ia_iosize = 4;
return 1;
}
ahaprint()
{
}
/*
* Attach all the sub-devices we can find
*/
void
ahaattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct isa_attach_args *ia = aux;
struct aha_softc *aha = (void *)self;
if (ia->ia_drq != DRQUNK)
isa_dmacascade(ia->ia_drq);
aha_init(aha);
TAILQ_INIT(&aha->free_ccb);
/*
* fill in the prototype scsi_link.
*/
aha->sc_link.adapter_softc = aha;
aha->sc_link.adapter_target = aha->aha_scsi_dev;
aha->sc_link.adapter = &aha_switch;
aha->sc_link.device = &aha_dev;
aha->sc_link.openings = 2;
printf("\n");
#ifdef NEWCONFIG
isa_establish(&aha->sc_id, &aha->sc_dev);
#endif
aha->sc_ih = isa_intr_establish(ia->ia_irq, ISA_IST_EDGE, ISA_IPL_BIO,
ahaintr, aha);
/*
* ask the adapter what subunits are present
*/
config_found(self, &aha->sc_link, ahaprint);
}
/*
* Catch an interrupt from the adaptor
*/
int
ahaintr(arg)
void *arg;
{
struct aha_softc *aha = arg;
struct aha_mbx_in *wmbi;
struct aha_mbx *wmbx;
struct aha_ccb *ccb;
u_char stat;
int i;
int found = 0;
#ifdef AHADEBUG
printf("%s: ahaintr ", aha->sc_dev.dv_xname);
#endif /*AHADEBUG */
/*
* First acknowlege the interrupt, Then if it's not telling about
* a completed operation just return.
*/
stat = inb(AHA_INTR_PORT);
if ((stat & (AHA_MBOA | AHA_MBIF)) == 0) {
outb(AHA_CTRL_STAT_PORT, AHA_IRST);
return -1; /* XXX */
}
/* Mail box out empty? */
if (stat & AHA_MBOA) {
/* Disable MBO available interrupt. */
outb(AHA_CMD_DATA_PORT, AHA_MBO_INTR_EN);
for (i = 100000; i; i--) {
if (!(inb(AHA_CTRL_STAT_PORT) & AHA_CDF))
break;
delay(10);
}
if (!i) {
printf("%s: ahaintr, cmd/data port full\n",
aha->sc_dev.dv_xname);
outb(AHA_CTRL_STAT_PORT, AHA_SRST);
return 1;
}
outb(AHA_CMD_DATA_PORT, 0x00); /* Disable */
wakeup(&aha->aha_mbx);
}
/* Mail box in full? */
if ((stat & AHA_MBIF) == 0)
return 1;
wmbx = &aha->aha_mbx;
wmbi = wmbx->tmbi;
AGAIN:
while (wmbi->stat != AHA_MBI_FREE) {
ccb = aha_ccb_phys_kv(aha, _3btol(wmbi->ccb_addr));
if (!ccb) {
wmbi->stat = AHA_MBI_FREE;
printf("%s: BAD CCB ADDR!\n", aha->sc_dev.dv_xname);
continue;
}
found++;
switch (wmbi->stat) {
case AHA_MBI_OK:
case AHA_MBI_ERROR:
break;
case AHA_MBI_ABORT:
ccb->host_stat = AHA_ABORTED;
break;
case AHA_MBI_UNKNOWN:
ccb = 0;
break;
default:
panic("Impossible mbxi status");
}
#ifdef AHADEBUG
if (aha_debug && ccb) {
u_char *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, ",
wmbi->stat, wmbi);
printf("ccb addr = 0x%x\n", ccb);
}
#endif /* AHADEBUG */
wmbi->stat = AHA_MBI_FREE;
if (ccb) {
untimeout(aha_timeout, ccb);
aha_done(aha, ccb);
}
aha_nextmbx(wmbi, wmbx, mbi);
}
if (!found) {
for (i = 0; i < AHA_MBX_SIZE; i++) {
if (wmbi->stat != AHA_MBI_FREE) {
found++;
break;
}
aha_nextmbx(wmbi, wmbx, mbi);
}
if (!found) {
printf("%s: mbi at 0x%08x should be found, stat=%02x..resync\n",
aha->sc_dev.dv_xname, wmbi, wmbi->stat);
} else {
found = 0;
goto AGAIN;
}
}
wmbx->tmbi = wmbi;
outb(AHA_CTRL_STAT_PORT, AHA_IRST);
return 1;
}
/*
* A ccb (and hence a mbx-out is put onto the
* free list.
*/
void
aha_free_ccb(aha, ccb, flags)
struct aha_softc *aha;
struct aha_ccb *ccb;
int flags;
{
int opri;
opri = splbio();
ccb->flags = CCB_FREE;
TAILQ_INSERT_HEAD(&aha->free_ccb, ccb, chain);
/*
* If there were none, wake anybody waiting for one to come free,
* starting with queued entries.
*/
if (!ccb->chain.tqe_next)
wakeup(&aha->free_ccb);
splx(opri);
}
/*
* Get a free ccb
*/
struct aha_ccb *
aha_get_ccb(aha, flags)
struct aha_softc *aha;
int flags;
{
int opri;
struct aha_ccb *ccb;
int hashnum;
opri = splbio();
/*
* If we can and have to, sleep waiting for one
* to come free
*/
for (;;) {
ccb = aha->free_ccb.tqh_first;
if (ccb) {
TAILQ_REMOVE(&aha->free_ccb, ccb, chain);
break;
}
if (aha->numccbs < AHA_CCB_MAX) {
if (ccb = (struct aha_ccb *) malloc(sizeof(struct aha_ccb),
M_TEMP, M_NOWAIT)) {
bzero(ccb, sizeof(struct aha_ccb));
aha->numccbs++;
/*
* put in the phystokv hash table
* Never gets taken out.
*/
ccb->hashkey = KVTOPHYS(ccb);
hashnum = CCB_HASH(ccb->hashkey);
ccb->nexthash = aha->ccbhash[hashnum];
aha->ccbhash[hashnum] = ccb;
} else {
printf("%s: can't malloc ccb\n",
aha->sc_dev.dv_xname);
}
break;
} else {
if ((flags & SCSI_NOSLEEP) == 0)
tsleep(&aha->free_ccb, PRIBIO, "ahaccb", 0);
}
}
splx(opri);
return ccb;
}
/*
* given a physical address, find the ccb that it corresponds to.
*/
struct aha_ccb *
aha_ccb_phys_kv(aha, ccb_phys)
struct aha_softc *aha;
u_long ccb_phys;
{
int hashnum = CCB_HASH(ccb_phys);
struct aha_ccb *ccb = aha->ccbhash[hashnum];
while (ccb) {
if (ccb->hashkey == ccb_phys)
break;
ccb = ccb->nexthash;
}
return ccb;
}
/*
* Get a mbo and send the ccb.
*/
struct aha_mbx_out *
aha_send_mbo(aha, cmd, ccb)
struct aha_softc *aha;
int cmd;
struct aha_ccb *ccb;
{
struct aha_mbx_out *wmbo; /* Mail Box Out pointer */
struct aha_mbx *wmbx; /* Mail Box pointer specified unit */
int i;
/* Get the target out mail box pointer and increment. */
wmbx = &aha->aha_mbx;
wmbo = wmbx->tmbo;
aha_nextmbx(wmbx->tmbo, wmbx, mbo);
/*
* Check the outmail box is free or not.
* Note: Under the normal operation, it shuld NOT happen to wait.
*/
while (wmbo->cmd != AHA_MBO_FREE) {
/* Enable mbo available interrupt. */
outb(AHA_CMD_DATA_PORT, AHA_MBO_INTR_EN);
for (i = 100000; i; i--) {
if (!(inb(AHA_CTRL_STAT_PORT) & AHA_CDF))
break;
delay(10);
}
if (!i) {
printf("%s: aha_send_mbo, cmd/data port full\n",
aha->sc_dev.dv_xname);
outb(AHA_CTRL_STAT_PORT, AHA_SRST);
return NULL;
}
outb(AHA_CMD_DATA_PORT, 0x01); /* Enable */
tsleep(wmbx, PRIBIO, "ahasnd", 0);/*XXX can't do this */
}
/* Link ccb to mbo. */
lto3b(KVTOPHYS(ccb), wmbo->ccb_addr);
ccb->mbx = wmbo;
wmbo->cmd = cmd;
/* Sent it! */
outb(AHA_CMD_DATA_PORT, AHA_START_SCSI);
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
aha_done(aha, ccb)
struct aha_softc *aha;
struct aha_ccb *ccb;
{
struct scsi_sense_data *s1, *s2;
struct scsi_xfer *xs = ccb->xs;
SC_DEBUG(xs->sc_link, SDEV_DB2, ("aha_done\n"));
/*
* Otherwise, put the results of the operation
* into the xfer and call whoever started it
*/
if ((xs->flags & INUSE) == 0) {
printf("%s: exiting but not in use!\n", aha->sc_dev.dv_xname);
Debugger();
}
if (xs->error == XS_NOERROR) {
if (ccb->host_stat != AHA_OK) {
switch (ccb->host_stat) {
case AHA_ABORTED:
xs->error = XS_DRIVER_STUFFUP;
break;
case AHA_SEL_TIMEOUT: /* No response */
xs->error = XS_SELTIMEOUT;
break;
default: /* Other scsi protocol messes */
printf("%s: host_stat %x\n",
aha->sc_dev.dv_xname, ccb->host_stat);
xs->error = XS_DRIVER_STUFFUP;
}
} else if (ccb->target_stat != SCSI_OK) {
switch (ccb->target_stat) {
case SCSI_CHECK:
s1 = (struct scsi_sense_data *) (((char *) (&ccb->scsi_cmd)) +
ccb->scsi_cmd_length);
s2 = &xs->sense;
*s2 = *s1;
xs->error = XS_SENSE;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
break;
default:
printf("%s: target_stat %x\n",
aha->sc_dev.dv_xname, ccb->target_stat);
xs->error = XS_DRIVER_STUFFUP;
}
} else
xs->resid = 0;
}
xs->flags |= ITSDONE;
aha_free_ccb(aha, ccb, xs->flags);
scsi_done(xs);
}
/*
* Find the board and find its irq/drq
*/
int
aha_find(aha)
struct aha_softc *aha;
{
u_char ad[3];
volatile int i, sts;
struct aha_config conf;
struct aha_inquire inquire;
struct aha_extbios extbios;
/*
* reset board, If it doesn't respond, assume
* that it's not there.. good for the probe
*/
outb(AHA_CTRL_STAT_PORT, AHA_HRST | AHA_SRST);
for (i = AHA_RESET_TIMEOUT; i; i--) {
sts = inb(AHA_CTRL_STAT_PORT);
if (sts == (AHA_IDLE | AHA_INIT))
break;
delay(1000); /* calibrated in msec */
}
if (!i) {
#ifdef AHADEBUG
if (aha_debug)
printf("aha_find: No answer from adaptec board\n");
#endif /*AHADEBUG */
return ENXIO;
}
/*
* Assume we have a board at this stage, do an adapter inquire
* to find out what type of controller it is. If the command
* fails, we assume it's either a crusty board or an old 1542
* clone, and skip the board-specific stuff.
*/
if (aha_cmd(aha, 0, sizeof(inquire), 1, &inquire, AHA_INQUIRE)) {
/*
* aha_cmd() already started the reset. It's not clear we
* even need to bother here.
*/
for (i = AHA_RESET_TIMEOUT; i; i--) {
sts = inb(AHA_CTRL_STAT_PORT);
if (sts == (AHA_IDLE | AHA_INIT))
break;
delay(1000);
}
if (!i) {
#ifdef AHADEBUG
printf("aha_init: soft reset failed\n");
#endif /* AHADEBUG */
return ENXIO;
}
#ifdef AHADEBUG
printf("aha_init: inquire command failed\n");
#endif /* AHADEBUG */
goto noinquire;
}
#ifdef AHADEBUG
printf("%s: inquire %x, %x, %x, %x\n",
aha->sc_dev.dv_xname,
inquire.boardid, inquire.spec_opts,
inquire.revision_1, inquire.revision_2);
#endif /* AHADEBUG */
/*
* If we are a 1542C or 1542CF disable the extended bios so that the
* mailbox interface is unlocked.
* No need to check the extended bios flags as some of the
* extensions that cause us problems are not flagged in that byte.
*/
if (inquire.boardid == 0x43 || inquire.boardid == 0x44 ||
inquire.boardid == 0x45) {
aha_cmd(aha, 0, sizeof(extbios), 0, &extbios, AHA_EXT_BIOS);
#ifdef AHADEBUG
printf("%s: extended bios flags %x\n", aha->sc_dev.dv_xname,
extbios.flags);
#endif /* AHADEBUG */
printf("%s: 1542C/CF detected, unlocking mailbox\n",
aha->sc_dev.dv_xname);
aha_cmd(aha, 2, 0, 0, 0, AHA_MBX_ENABLE,
0, extbios.mailboxlock);
}
noinquire:
/*
* setup dma channel from jumpers and save int
* level
*/
delay(1000); /* for Bustek 545 */
aha_cmd(aha, 0, sizeof(conf), 0, &conf, AHA_CONF_GET);
switch (conf.chan) {
case CHAN0:
aha->sc_drq = 0;
break;
case CHAN5:
aha->sc_drq = 5;
break;
case CHAN6:
aha->sc_drq = 6;
break;
case CHAN7:
aha->sc_drq = 7;
break;
default:
printf("illegal dma setting %x\n", conf.chan);
return EIO;
}
switch (conf.intr) {
case INT9:
aha->sc_irq = 9;
break;
case INT10:
aha->sc_irq = 10;
break;
case INT11:
aha->sc_irq = 11;
break;
case INT12:
aha->sc_irq = 12;
break;
case INT14:
aha->sc_irq = 14;
break;
case INT15:
aha->sc_irq = 15;
break;
default:
printf("illegal int setting %x\n", conf.intr);
return EIO;
}
/* who are we on the scsi bus? */
aha->aha_scsi_dev = conf.scsi_dev;
/*
* Change the bus on/off times to not clash with other dma users.
*/
aha_cmd(aha, 1, 0, 0, 0, AHA_BUS_ON_TIME_SET, 7);
aha_cmd(aha, 1, 0, 0, 0, AHA_BUS_OFF_TIME_SET, 4);
#ifdef TUNE_1542
#error XXX Must deal with configuring the DRQ channel if we do this.
/*
* Initialize memory transfer speed
* Not compiled in by default because it breaks some machines
*/
if (!aha_set_bus_speed(aha))
return EIO;
#endif /* TUNE_1542 */
return 0;
}
/*
* Start the board, ready for normal operation
*/
void
aha_init(aha)
struct aha_softc *aha;
{
u_char ad[3];
int i;
/*
* Initialize mail box
*/
lto3b(KVTOPHYS(&aha->aha_mbx), ad);
aha_cmd(aha, 4, 0, 0, 0, AHA_MBX_INIT, AHA_MBX_SIZE,
ad[0], ad[1], ad[2]);
for (i = 0; i < AHA_MBX_SIZE; i++) {
aha->aha_mbx.mbo[i].cmd = AHA_MBO_FREE;
aha->aha_mbx.mbi[i].stat = AHA_MBO_FREE;
}
/*
* Set up initial mail box for round-robin operation.
*/
aha->aha_mbx.tmbo = &aha->aha_mbx.mbo[0];
aha->aha_mbx.tmbi = &aha->aha_mbx.mbi[0];
}
void
ahaminphys(bp)
struct buf *bp;
{
if (bp->b_bcount > ((AHA_NSEG - 1) << PGSHIFT))
bp->b_bcount = ((AHA_NSEG - 1) << PGSHIFT);
}
/*
* start a scsi operation given the command and the data address. Also needs
* the unit, target and lu.
*/
int
aha_scsi_cmd(xs)
struct scsi_xfer *xs;
{
struct scsi_link *sc_link = xs->sc_link;
struct aha_softc *aha = sc_link->adapter_softc;
struct aha_ccb *ccb;
struct aha_scat_gath *sg;
int seg; /* scatter gather seg being worked on */
int thiskv;
u_long thisphys, nextphys;
int bytes_this_seg, bytes_this_page, datalen, flags;
struct iovec *iovp;
struct aha_mbx_out *mbo;
int s;
SC_DEBUG(sc_link, SDEV_DB2, ("aha_scsi_cmd\n"));
/*
* get a ccb 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 ((flags & (ITSDONE|INUSE)) != INUSE) {
printf("%s: done or not in use?\n", aha->sc_dev.dv_xname);
xs->flags &= ~ITSDONE;
xs->flags |= INUSE;
}
if ((ccb = aha_get_ccb(aha, flags)) == NULL) {
xs->error = XS_DRIVER_STUFFUP;
return TRY_AGAIN_LATER;
}
ccb->flags = CCB_ACTIVE;
ccb->xs = xs;
/*
* Put all the arguments for the xfer in the ccb
*/
if (flags & SCSI_RESET) {
ccb->opcode = AHA_RESET_CCB;
} else {
/* can't use S/G if zero length */
ccb->opcode = (xs->datalen ? AHA_INIT_SCAT_GATH_CCB
: AHA_INITIATOR_CCB);
}
ccb->data_out = 0;
ccb->data_in = 0;
ccb->target = sc_link->target;
ccb->lun = sc_link->lun;
ccb->scsi_cmd_length = xs->cmdlen;
ccb->req_sense_length = sizeof(ccb->scsi_sense);
ccb->host_stat = 0x00;
ccb->target_stat = 0x00;
if (xs->datalen && (flags & SCSI_RESET) == 0) {
lto3b(KVTOPHYS(ccb->scat_gath), ccb->data_addr);
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 < AHA_NSEG) {
lto3b(iovp->iov_base, sg->seg_addr);
lto3b(iovp->iov_len, sg->seg_len);
xs->datalen += iovp->iov_len;
SC_DEBUGN(sc_link, SDEV_DB4, ("UIO(0x%x@0x%x)",
iovp->iov_len, iovp->iov_base));
sg++;
iovp++;
seg++;
datalen--;
}
} else
#endif /*TFS_ONLY */
{
/*
* 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 < AHA_NSEG) {
bytes_this_seg = 0;
/* put in the base address */
lto3b(thisphys, sg->seg_addr);
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
*/
/* check it fits on the ISA bus */
if (thisphys > 0xFFFFFF) {
printf("%s: DMA beyond"
" end of ISA\n",
aha->sc_dev.dv_xname);
xs->error = XS_DRIVER_STUFFUP;
aha_free_ccb(aha, ccb, flags);
return COMPLETE;
}
/** 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));
lto3b(bytes_this_seg, sg->seg_len);
sg++;
seg++;
}
}
lto3b(seg * sizeof(struct aha_scat_gath), ccb->data_length);
SC_DEBUGN(sc_link, SDEV_DB4, ("\n"));
if (datalen) {
/*
* there's still data, must have run out of segs!
*/
printf("%s: aha_scsi_cmd, more than %d dma segs\n",
aha->sc_dev.dv_xname, AHA_NSEG);
xs->error = XS_DRIVER_STUFFUP;
aha_free_ccb(aha, ccb, flags);
return COMPLETE;
}
} else { /* No data xfer, use non S/G values */
lto3b(0, ccb->data_addr);
lto3b(0, ccb->data_length);
}
ccb->link_id = 0;
lto3b(0, ccb->link_addr);
/*
* Put the scsi command in the ccb and start it
*/
if ((flags & SCSI_RESET) == 0)
bcopy(xs->cmd, &ccb->scsi_cmd, ccb->scsi_cmd_length);
s = splbio();
if (aha_send_mbo(aha, AHA_MBO_START, ccb) == NULL) {
xs->error = XS_DRIVER_STUFFUP;
aha_free_ccb(aha, ccb, flags);
return TRY_AGAIN_LATER;
}
/*
* Usually return SUCCESSFULLY QUEUED
*/
SC_DEBUG(sc_link, SDEV_DB3, ("cmd_sent\n"));
if ((flags & SCSI_POLL) == 0) {
timeout(aha_timeout, ccb, (xs->timeout * hz) / 1000);
splx(s);
return SUCCESSFULLY_QUEUED;
}
splx(s);
/*
* If we can't use interrupts, poll on completion
*/
if (aha_poll(aha, xs, xs->timeout)) {
aha_timeout(ccb);
if (aha_poll(aha, xs, 2000))
aha_timeout(ccb);
}
return COMPLETE;
}
/*
* Poll a particular unit, looking for a particular xs
*/
int
aha_poll(aha, xs, count)
struct aha_softc *aha;
struct scsi_xfer *xs;
int count;
{
/* timeouts are in msec, so we loop in 1000 usec cycles */
while (count) {
/*
* If we had interrupts enabled, would we
* have got an interrupt?
*/
if (inb(AHA_INTR_PORT) & AHA_ANY_INTR)
ahaintr(aha);
if (xs->flags & ITSDONE)
return 0;
delay(1000); /* only happens in boot so ok */
count--;
}
return 1;
}
#ifdef TUNE_1542
/*
* Try all the speeds from slowest to fastest.. if it finds a
* speed that fails, back off one notch from the last working
* speed (unless there is no other notch).
* Returns the nSEC value of the time used
* or 0 if it could get a working speed (or the NEXT speed
* failed)
*/
static struct bus_speed {
u_char arg;
int nsecs;
} aha_bus_speeds[] = {
{0x88, 100},
{0x99, 150},
{0xaa, 200},
{0xbb, 250},
{0xcc, 300},
{0xdd, 350},
{0xee, 400},
{0xff, 450}
};
int
aha_set_bus_speed(aha)
struct aha_softc *aha;
{
int speed;
int lastworking;
lastworking = -1;
for (speed = 7; speed >= 0; speed--) {
if (!aha_bus_speed_check(aha, speed))
break;
lastworking = speed;
}
if (lastworking == -1) {
printf("no working bus speed\n");
return 0;
}
printf("%d nsec ", aha_bus_speeds[lastworking].nsecs);
if (lastworking == 7) /* is slowest already */
printf("marginal\n");
else {
lastworking++;
printf("ok, using %d nsec\n",
aha_bus_speeds[lastworking].nsecs);
}
if (!aha_bus_speed_check(aha, lastworking)) {
printf("test retry failed.. aborting.\n");
return 0;
}
return 1;
}
/*
* Set the DMA speed to the Nth speed and try an xfer. If it
* fails return 0, if it succeeds return the nSec value selected
* If there is no such speed return COMPLETE.
*/
char aha_scratch_buf[256];
char aha_test_string[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890abcdefghijklmnopqrstuvwxyz!@";
int
aha_bus_speed_check(aha, speed)
struct aha_softc *aha;
int speed;
{
int numspeeds = sizeof(aha_bus_speeds) / sizeof(struct bus_speed);
int loopcount;
u_char ad[3];
/*
* Set the dma-speed
*/
aha_cmd(aha, 1, 0, 0, 0, AHA_SPEED_SET, aha_bus_speeds[speed].arg);
/*
* put the test data into the buffer and calculate
* it's address. Read it onto the board
*/
for (loopcount = 100; loopcount; loopcount--) {
lto3b(KVTOPHYS(aha_test_string), ad);
aha_cmd(aha, 3, 0, 0, 0, AHA_WRITE_FIFO, ad[0], ad[1], ad[2]);
/*
* Clear the buffer then copy the contents back from the
* board.
*/
bzero(aha_scratch_buf, 54);
lto3b(KVTOPHYS(aha_scratch_buf), ad);
aha_cmd(aha, 3, 0, 0, 0, AHA_READ_FIFO, ad[0], ad[1], ad[2]);
/*
* Compare the original data and the final data and return the
* correct value depending upon the result. We only check the
* first 54 bytes, because that's all the board copies during
* WRITE_FIFO and READ_FIFO.
*/
if (memcmp(aha_test_string, aha_scratch_buf, 54))
return 0; /* failed test */
}
/* copy succeeded; assume speed ok */
return 1;
}
#endif /* TUNE_1542 */
void
aha_timeout(arg)
void *arg;
{
struct aha_ccb *ccb = arg;
struct scsi_xfer *xs = ccb->xs;
struct scsi_link *sc_link = xs->sc_link;
struct aha_softc *aha = sc_link->adapter_softc;
int s;
sc_print_addr(sc_link);
printf("timed out");
s = splbio();
/*
* If The ccb's mbx is not free, then the board has gone south?
*/
if (aha_ccb_phys_kv(aha, _3btol(ccb->mbx->ccb_addr)) == ccb &&
ccb->mbx->cmd != AHA_MBO_FREE) {
printf("%s: not taking commands!\n", aha->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->xs->retries = 0;
aha_done(aha, ccb);
} else {
/* abort the operation that has timed out */
printf("\n");
ccb->xs->error = XS_TIMEOUT;
ccb->flags = CCB_ABORTED;
aha_send_mbo(aha, AHA_MBO_ABORT, ccb);
/* 2 secs for the abort */
if ((xs->flags & SCSI_POLL) == 0)
timeout(aha_timeout, ccb, 2 * hz);
}
splx(s);
}
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