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NetBSD/sys/dev/isa/aha1542.c

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/*
* (Mostly) 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: aha1542.c,v 1.17 1994/01/03 23:53:29 mycroft Exp $
*/
/*
* a FEW lines in this driver come from a MACH adaptec-disk driver
* so the copyright below is included:
*
* Copyright 1990 by Open Software Foundation,
* Grenoble, FRANCE
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation, and that the name of OSF or Open Software
* Foundation not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission.
*
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "aha.h"
#include <sys/types.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>
#include <sys/dkbad.h>
#include <sys/disklabel.h>
#include <machine/stdarg.h>
#include <machine/pio.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <i386/isa/isa_device.h>
#ifdef DDB
int Debugger();
#else DDB
#define Debugger() panic("should call debugger here (adaptec.c)")
#endif DDB
extern int delaycount; /* from clock setup code */
/* I/O Port Interface */
#define AHA_BASE aha_base[unit]
#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 */
struct aha_cmd_buf {
u_char byte[16];
};
/* 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 */
struct aha_mbx {
struct aha_mbx_out {
unsigned char cmd;
unsigned char ccb_addr[3];
} mbo[AHA_MBX_SIZE];
struct aha_mbx_in{
unsigned char stat;
unsigned char ccb_addr[3];
} mbi[AHA_MBX_SIZE];
};
/* 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 */
#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 */
extern struct aha_mbx aha_mbx[];
/* FOR OLD VERSIONS OF THE !%$@ this may have to be 16 (yuk) */
/* Number of scatter gather segments <= 16, allow 64 K i/o (min) */
#define AHA_NSEG 17
struct aha_ccb {
unsigned char opcode;
unsigned char lun:3;
unsigned char data_in:1; /* must be 0 */
unsigned char data_out:1; /* must be 0 */
unsigned char target:3;
unsigned char scsi_cmd_length;
unsigned char req_sense_length;
unsigned char data_length[3];
unsigned char data_addr[3];
unsigned char link_addr[3];
unsigned char link_id;
unsigned char host_stat;
unsigned char target_stat;
unsigned char reserved[2];
struct scsi_generic scsi_cmd;
struct scsi_sense_data scsi_sense;
struct aha_scat_gath {
unsigned char seg_len[3];
unsigned char seg_addr[3];
} scat_gath[AHA_NSEG];
struct aha_ccb *next;
struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */
struct aha_mbx_out *mbx; /* pointer to mail box */
long int delta; /* difference from previous*/
struct aha_ccb *later,*sooner;
int flags;
};
/* flags value? */
#define CCB_FREE 0
#define CCB_ACTIVE 1
#define CCB_ABORTED 2
struct aha_ccb *aha_soonest = (struct aha_ccb *)0;
struct aha_ccb *aha_latest = (struct aha_ccb *)0;
long int aha_furtherest = 0; /* longest time in the timeout queue */
/* 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 scattter 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;
};
#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
#define PHYSTOKV(x) ((x) + KERNBASE)
#define KVTOPHYS(x) vtophys(x)
#define AHA_DMA_PAGES AHA_NSEG
#define PAGESIZ 4096
#define INVALIDATE_CACHE {asm volatile( ".byte 0x0F ;.byte 0x08" ); }
struct scsi_xfer aha_scsi_xfer[NAHA];
struct isa_device *ahainfo[NAHA];
struct aha_mbx aha_mbx[NAHA];
struct aha_ccb *aha_ccb_free[NAHA];
struct aha_ccb aha_ccb[NAHA][AHA_MBX_SIZE];
struct aha_ccb *aha_get_ccb();
u_char aha_scratch_buf[256];
short aha_base[NAHA]; /* base port for each board */
int speed[NAHA];
int aha_int[NAHA];
int aha_dma[NAHA];
int aha_scsi_dev[NAHA];
int aha_initialized[NAHA];
int aha_debug = 0;
static int ahaunit = 0;
#define aha_abortmbx(mbx) \
(mbx)->cmd = AHA_MBO_ABORT; \
outb(AHA_CMD_DATA_PORT, AHA_START_SCSI);
#define aha_startmbx(mbx) \
(mbx)->cmd = AHA_MBO_START; \
outb(AHA_CMD_DATA_PORT, AHA_START_SCSI);
#define AHA_CMD_TIMEOUT_FUDGE 200 /* multiplied to get Secs */
#define AHA_RESET_TIMEOUT 1000000 /* time to wait for reset */
#define AHA_SCSI_TIMEOUT_FUDGE 20 /* divided by for mSecs */
int aha_cmd(int, int, int, int, u_char *, ...);
int ahaprobe(struct isa_device *);
int ahaattach(struct isa_device *);
long int aha_adapter_info(int);
int ahaintr(int);
void aha_free_ccb(int, struct aha_ccb *, int);
struct aha_ccb * aha_get_ccb(int, int);
int aha_done(int, struct aha_ccb *);
int aha_init(int);
void ahaminphys(struct buf *);
int aha_scsi_cmd(struct scsi_xfer *);
int aha_set_bus_speed(int);
int aha_bus_speed_check(int, int);
void aha_add_timeout(struct aha_ccb *, int);
void aha_remove_timeout(struct aha_ccb *);
void aha_timeout(int);
struct isa_driver ahadriver = {
ahaprobe,
ahaattach,
"aha"
};
struct scsi_switch aha_switch[NAHA];
/*
* aha_cmd(unit, icnt, ocnt,wait, retval, ...)
* 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 AHA_NOP, AHA_MBX_INIT, AHA_START_SCSI & 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
aha_cmd(int unit, int icnt, int ocnt, int wait, u_char *retval, ...)
{
va_list ap;
int opc, sts;
u_char oc;
register i;
va_start(ap, retval);
opc = (u_char)va_arg(ap, int);
/*printf("command: %08x %02x\n", opc, (u_char)opc);*/
/*
* multiply the wait argument by a big constant
* zero defaults to 1
*/
if(!wait)
wait = AHA_CMD_TIMEOUT_FUDGE * delaycount;
else
wait *= AHA_CMD_TIMEOUT_FUDGE * delaycount;
/*
* Wait for the adapter to go idle, unless it's one of
* the commands which don't need this
*/
if (opc != AHA_MBX_INIT && opc != AHA_START_SCSI) {
i = AHA_CMD_TIMEOUT_FUDGE * delaycount; /* 1 sec?*/
while (--i) {
sts = inb(AHA_CTRL_STAT_PORT);
if (sts & AHA_IDLE)
break;
}
if (!i) {
printf("aha_cmd: aha1542 host not idle(0x%x)\n", 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=0; i< wait; i++) {
sts = inb(AHA_CTRL_STAT_PORT);
if (!(sts & AHA_CDF))
break;
}
if (i >= wait) {
printf("aha_cmd: aha1542 cmd/data port full\n");
outb(AHA_CTRL_STAT_PORT, AHA_SRST);
return(ENXIO);
}
outb(AHA_CMD_DATA_PORT, (u_char)opc);
if(icnt) {
opc = (u_char)va_arg(ap, int);
/*printf("extra: %08x %02x\n", opc, (u_char)opc);*/
}
}
va_end(ap);
/*
* 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=0; i< wait; i++) {
sts = inb(AHA_CTRL_STAT_PORT);
if (sts & AHA_DF)
break;
}
if (i >= wait) {
printf("aha_cmd: aha1542 cmd/data port empty %d\n",ocnt);
return(ENXIO);
}
oc = inb(AHA_CMD_DATA_PORT);
if (retval)
*retval++ = oc;
}
/*
* Wait for the board to report a finised instruction
*/
i=AHA_CMD_TIMEOUT_FUDGE * delaycount; /* 1 sec? */
while (--i) {
sts = inb(AHA_INTR_PORT);
if (sts & AHA_HACC)
break;
}
if (!i) {
printf("aha_cmd: aha1542 host not finished(0x%x)\n",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(struct isa_device *dev)
{
int unit = ahaunit;
dev->id_unit = unit;
aha_base[unit] = dev->id_iobase;
if(unit >= NAHA) {
printf("aha: unit number (%d) too high\n",unit);
return(0);
}
/*
* Try initialise a unit at this location
* sets up dma and bus speed, loads aha_int[unit]
*/
if (aha_init(unit) != 0)
return(0);
/*
* If it's there, put in it's interrupt vectors
*/
dev->id_irq = (1 << aha_int[unit]);
dev->id_drq = aha_dma[unit];
ahaunit++;
return(8);
}
/*
* Attach all the sub-devices we can find
*/
int
ahaattach(struct isa_device *dev)
{
static int firsttime;
static int firstswitch[NAHA];
static u_long speedprint; /* max 32 aha controllers */
int masunit = dev->id_masunit;
int r;
if (!firstswitch[masunit]) {
firstswitch[masunit] = 1;
aha_switch[masunit].name = "aha";
aha_switch[masunit].scsi_cmd = aha_scsi_cmd;
aha_switch[masunit].scsi_minphys = ahaminphys;
aha_switch[masunit].open_target_lu = 0;
aha_switch[masunit].close_target_lu = 0;
aha_switch[masunit].adapter_info = aha_adapter_info;
for (r = 0; r < 8; r++) {
aha_switch[masunit].empty[r] = 0;
aha_switch[masunit].used[r] = 0;
aha_switch[masunit].printed[r] = 0;
}
}
if(!(speedprint & (1<<masunit))) {
DELAY(1000000);
speedprint |= (1<<masunit);
printf("aha%d: bus speed %dns\n", masunit, speed[masunit]);
}
r = scsi_attach(masunit, aha_scsi_dev[masunit], &aha_switch[masunit],
&dev->id_physid, &dev->id_unit, dev->id_flags);
/* only one for all boards */
if(firsttime==0) {
firsttime = 1;
aha_timeout(0);
}
return r;
}
/*
* Return some information to the caller about
* the adapter and it's capabilities
*/
long int
aha_adapter_info(int unit)
{
return(2); /* 2 outstanding requests at a time per device */
}
/*
* Catch an interrupt from the adaptor
*/
int
ahaintr(int unit)
{
struct aha_ccb *ccb;
unsigned char stat;
register i;
if(scsi_debug & PRINTROUTINES)
printf("ahaintr ");
/*
* First acknowlege the interrupt, Then if it's
* not telling about a completed operation
* just return.
*/
stat = inb(AHA_INTR_PORT);
outb(AHA_CTRL_STAT_PORT, AHA_IRST);
if(scsi_debug & TRACEINTERRUPTS)
printf("int ");
if (! (stat & AHA_MBIF))
return(1);
if(scsi_debug & TRACEINTERRUPTS)
printf("b ");
/*
* If it IS then process the competed operation
*/
for (i = 0; i < AHA_MBX_SIZE; i++) {
if (aha_mbx[unit].mbi[i].stat != AHA_MBI_FREE) {
ccb = (struct aha_ccb *)PHYSTOKV(
(_3btol(aha_mbx[unit].mbi[i].ccb_addr)));
if((stat = aha_mbx[unit].mbi[i].stat) != AHA_MBI_OK) {
switch(stat) {
case AHA_MBI_ABORT:
if(aha_debug)
printf("abort");
ccb->host_stat = AHA_ABORTED;
break;
case AHA_MBI_UNKNOWN:
ccb = (struct aha_ccb *)0;
if(aha_debug)
printf("unknown ccb for abort ");
/* may have missed it */
/* no such ccb known for abort */
break;
case AHA_MBI_ERROR:
break;
default:
panic("Impossible mbxi status");
}
if( aha_debug && ccb ) {
u_char *cp;
cp = (u_char *)(&(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[%d]\n"
, aha_mbx[unit].mbi[i].stat, i);
printf("addr = 0x%x\n", ccb);
}
}
if(ccb) {
aha_remove_timeout(ccb);
aha_done(unit,ccb);
}
aha_mbx[unit].mbi[i].stat = AHA_MBI_FREE;
}
}
return(1);
}
/*
* A ccb (and hence a mbx-out is put onto the
* free list.
*/
void
aha_free_ccb(int unit, struct aha_ccb *ccb, int flags)
{
unsigned int opri;
if(scsi_debug & PRINTROUTINES)
printf("ccb%d(0x%x)> ",unit,flags);
if (!(flags & SCSI_NOMASK))
opri = splbio();
ccb->next = aha_ccb_free[unit];
aha_ccb_free[unit] = ccb;
ccb->flags = CCB_FREE;
if(ccb->sooner || ccb->later) {
printf("yikes, still in timeout queue\n");
aha_remove_timeout(ccb);
}
/*
* If there were none, wake abybody waiting for
* one to come free, starting with queued entries*
*/
if (!ccb->next)
wakeup( (caddr_t)&aha_ccb_free[unit]);
if (!(flags & SCSI_NOMASK))
splx(opri);
}
/*
* Get a free ccb (and hence mbox-out entry)
*/
struct aha_ccb *
aha_get_ccb(int unit, int flags)
{
unsigned opri;
struct aha_ccb *rc;
if(scsi_debug & PRINTROUTINES)
printf("<ccb%d(0x%x) ",unit,flags);
if (!(flags & SCSI_NOMASK))
opri = splbio();
/*
* If we can and have to, sleep waiting for one
* to come free
*/
while ((!(rc = aha_ccb_free[unit])) && (!(flags & SCSI_NOSLEEP)))
sleep((caddr_t)&aha_ccb_free[unit], PRIBIO);
if (rc) {
aha_ccb_free[unit] = aha_ccb_free[unit]->next;
rc->flags = CCB_ACTIVE;
}
if (!(flags & SCSI_NOMASK))
splx(opri);
return(rc);
}
/*
* 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
*/
int
aha_done(int unit, struct aha_ccb *ccb)
{
struct scsi_sense_data *s1,*s2;
struct scsi_xfer *xs = ccb->xfer;
if(scsi_debug & PRINTROUTINES )
printf("aha_done ");
/*
* Otherwise, put the results of the operation
* into the xfer and call whoever started it
*/
if(!(xs->flags & INUSE)) {
printf("exiting but not in use! ");
Debugger();
}
if ((ccb->host_stat != AHA_OK || ccb->target_stat != SCSI_OK)
&& (!(xs->flags & SCSI_ERR_OK))) {
s1 = (struct scsi_sense_data *)(((char *)(&ccb->scsi_cmd))
+ ccb->scsi_cmd_length);
s2 = &(xs->sense);
if(ccb->host_stat) {
switch(ccb->host_stat) {
case AHA_ABORTED:
case AHA_SEL_TIMEOUT: /* No response */
xs->error = XS_TIMEOUT;
break;
default: /* Other scsi protocol messes */
xs->error = XS_DRIVER_STUFFUP;
if (aha_debug > 1)
printf("host_stat%x\n", ccb->host_stat);
}
} else {
switch(ccb->target_stat) {
case 0x02:
/* structure copy!!!!!*/
*s2=*s1;
xs->error = XS_SENSE;
break;
case 0x08:
xs->error = XS_BUSY;
break;
default:
if (aha_debug > 1)
printf("target_stat%x\n", ccb->target_stat);
xs->error = XS_DRIVER_STUFFUP;
}
}
} else
xs->resid = 0;
xs->flags |= ITSDONE;
aha_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
*/
int
aha_init(int unit)
{
struct aha_config conf;
unsigned char ad[3];
volatile int i,sts;
/*
* 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=0; i < AHA_RESET_TIMEOUT; i++) {
sts = inb(AHA_CTRL_STAT_PORT) ;
if(sts == (AHA_IDLE | AHA_INIT))
break;
}
if (i >= AHA_RESET_TIMEOUT) {
if (aha_debug)
printf("aha_init: No answer from adaptec board\n");
return(ENXIO);
}
/*
* Assume we have a board at this stage
* setup dma channel from jumpers and save int level
*/
DELAY(1000);
aha_cmd(unit, 0, sizeof(conf), 0, (u_char *)&conf, AHA_CONF_GET);
switch(conf.chan) {
case CHAN0:
outb(0x0b, 0x0c);
outb(0x0a, 0x00);
aha_dma[unit] = 0;
break;
case CHAN5:
outb(0xd6, 0xc1);
outb(0xd4, 0x01);
aha_dma[unit] = 5;
break;
case CHAN6:
outb(0xd6, 0xc2);
outb(0xd4, 0x02);
aha_dma[unit] = 6;
break;
case CHAN7:
outb(0xd6, 0xc3);
outb(0xd4, 0x03);
aha_dma[unit] = 7;
break;
default:
printf("illegal dma jumper setting\n");
return(EIO);
}
switch(conf.intr) {
case INT9:
aha_int[unit] = 9;
break;
case INT10:
aha_int[unit] = 10;
break;
case INT11:
aha_int[unit] = 11;
break;
case INT12:
aha_int[unit] = 12;
break;
case INT14:
aha_int[unit] = 14;
break;
case INT15:
aha_int[unit] = 15;
break;
default:
printf("illegal int jumper setting\n");
return(EIO);
}
/* who are we on the scsi bus */
aha_scsi_dev[unit] = conf.scsi_dev;
/*
* Initialize memory transfer speed
*/
speed[unit] = aha_set_bus_speed(unit);
if(speed[unit] == 0) {
printf("aha%d found, but unable to talk to it correctly\n");
return(EIO);
}
/*
* Initialize bus-on time
*
* The default is 11ms, which can result in the fd driver becoming
* starved for data during simultaneous fd & scsi transfers. We
* set it to 9ms - if this still gives you trouble, set to 6 (ms)
* and work your way up.
*/
aha_cmd(unit,1, 0, 0, 0, AHA_BUS_ON_TIME_SET, 9);
/*
* Initialize mail box
*/
lto3b(KVTOPHYS(&aha_mbx[unit]), ad);
aha_cmd(unit, 4, 0, 0, (u_char *)0, AHA_MBX_INIT, AHA_MBX_SIZE,
ad[0], ad[1], ad[2]);
/*
* link the ccb's with the mbox-out entries and
* into a free-list
*/
for (i=0; i < AHA_MBX_SIZE; i++) {
aha_ccb[unit][i].next = aha_ccb_free[unit];
aha_ccb_free[unit] = &aha_ccb[unit][i];
aha_ccb_free[unit]->flags = CCB_FREE;
aha_ccb_free[unit]->mbx = &aha_mbx[unit].mbo[i];
lto3b(KVTOPHYS(aha_ccb_free[unit]), aha_mbx[unit].mbo[i].ccb_addr);
}
/*
* Note that we are going and return (to probe)
*/
aha_initialized[unit]++;
return(0);
}
/*
* aha seems to explode with 17 segs (64k may require 17 segs)
* on old boards so use a max of 16 segs if you have problems
* here
*/
void
ahaminphys(struct buf *bp)
{
if(bp->b_bcount > ((AHA_NSEG - 1) * PAGESIZ))
bp->b_bcount = ((AHA_NSEG - 1) * PAGESIZ);
}
/*
* start a scsi operation given the command and
* the data address. Also needs the unit, target
* and lu
*/
int
aha_scsi_cmd(struct scsi_xfer *xs)
{
struct scsi_sense_data *s1,*s2;
struct aha_ccb *ccb;
struct aha_scat_gath *sg;
int seg; /* scatter gather seg being worked on */
int i = 0;
int rc = 0;
int thiskv;
int thisphys,nextphys;
int unit =xs->adapter;
int bytes_this_seg,bytes_this_page,datalen,flags;
struct iovec *iovp;
int s;
if(scsi_debug & PRINTROUTINES)
printf("aha_scsi_cmd ");
/*
* 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(!(flags & INUSE)) {
printf("not in use!");
Debugger();
xs->flags |= INUSE;
}
if(flags & ITSDONE) {
printf("Already done! check device retry code ");
Debugger();
xs->flags &= ~ITSDONE;
}
if(xs->bp) flags |= (SCSI_NOSLEEP); /* just to be sure */
if (!(ccb = aha_get_ccb(unit,flags))) {
xs->error = XS_DRIVER_STUFFUP;
return(TRY_AGAIN_LATER);
}
if (ccb->mbx->cmd != AHA_MBO_FREE)
printf("MBO not free\n");
/*
* Put all the arguments for the xfer in the ccb
* (can't use S/G if zero length)
*/
ccb->xfer = xs;
if(flags & SCSI_RESET)
ccb->opcode = AHA_RESET_CCB;
else
ccb->opcode = (xs->datalen ? AHA_INIT_SCAT_GATH_CCB : AHA_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->req_sense_length = sizeof(ccb->scsi_sense);
/* can use S/G only if not zero length */
if((xs->datalen) && (!(flags & SCSI_RESET))) {
lto3b(KVTOPHYS(ccb->scat_gath), ccb->data_addr);
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;
while ((datalen) && (seg < AHA_NSEG)) {
lto3b((u_long)iovp->iov_base, (u_char *)&sg->seg_addr);
lto3b(iovp->iov_len, (u_char *)&sg->seg_len);
if(scsi_debug & SHOWSCATGATH)
printf("(0x%x@0x%x)", iovp->iov_len,
iovp->iov_base);
sg++;
iovp++;
seg++;
datalen--;
}
} else {
/*
* Set up the scatter gather block
*/
if(scsi_debug & SHOWSCATGATH)
printf("%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, (u_char *)&(sg->seg_addr));
if(scsi_debug & SHOWSCATGATH)
printf("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 & (~(PAGESIZ - 1)))
+ PAGESIZ;
bytes_this_page =
min(nextphys - thisphys, datalen);
bytes_this_seg += bytes_this_page;
datalen -= bytes_this_page;
thiskv = (thiskv & (~(PAGESIZ - 1)))
+ PAGESIZ;
if(datalen)
thisphys = KVTOPHYS(thiskv);
}
/*
* next page isn't contiguous, finish the seg
*/
if(scsi_debug & SHOWSCATGATH)
printf("(0x%x)",bytes_this_seg);
lto3b(bytes_this_seg, (u_char *)&(sg->seg_len));
sg++;
seg++;
}
}
lto3b(seg * sizeof(struct aha_scat_gath), ccb->data_length);
if(scsi_debug & SHOWSCATGATH)
printf("\n");
if (datalen) {
/* there's still data, must have run out of segs! */
printf("aha_scsi_cmd%d: needed more than %d DMA segs, %d\n",
unit, AHA_NSEG, datalen);
xs->error = XS_DRIVER_STUFFUP;
aha_free_ccb(unit, ccb, flags);
return(HAD_ERROR);
}
} else { /* No data xfer, use non S/G values */
lto3b(0, ccb->data_addr );
lto3b(0, ccb->data_length);
}
lto3b(0, ccb->link_addr);
/*
* 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(scsi_debug & SHOWCOMMANDS)
{
u_char *b = (u_char *)&ccb->scsi_cmd;
if(!(flags & SCSI_RESET))
{
int i = 0;
printf("aha%d:%d:%d-"
,unit
,ccb->target
,ccb->lun );
while(i < ccb->scsi_cmd_length )
{
if(i) printf(",");
printf("%x",b[i++]);
}
}
else
{
printf("aha%d:%d:%d-RESET- "
,unit
,ccb->target
,ccb->lun
);
}
}
if (!(flags & SCSI_NOMASK))
{
s= splbio(); /* stop instant timeouts */
aha_add_timeout(ccb,xs->timeout);
aha_startmbx(ccb->mbx);
/*
* Usually return SUCCESSFULLY QUEUED
*/
splx(s);
if(scsi_debug & TRACEINTERRUPTS)
printf("sent ");
return(SUCCESSFULLY_QUEUED);
}
aha_startmbx(ccb->mbx);
if(scsi_debug & TRACEINTERRUPTS)
printf("cmd_sent, waiting ");
/*
* If we can't use interrupts, poll on completion*
*/
{
int done = 0;
int count = delaycount * xs->timeout / AHA_SCSI_TIMEOUT_FUDGE;
while((!done) && count)
{
i=0;
while ( (!done) && i<AHA_MBX_SIZE)
{
if ((aha_mbx[unit].mbi[i].stat != AHA_MBI_FREE )
&& (PHYSTOKV(_3btol(aha_mbx[unit].mbi[i].ccb_addr)
== (int)ccb)))
{
aha_mbx[unit].mbi[i].stat = AHA_MBI_FREE;
aha_done(unit,ccb);
done++;
}
i++;
}
count--;
}
if (!count)
{
if (!(xs->flags & SCSI_SILENT))
printf("cmd fail\n");
aha_abortmbx(ccb->mbx);
count = delaycount * 2000 / AHA_SCSI_TIMEOUT_FUDGE;
while((!done) && count) {
i=0;
while ( (!done) && i<AHA_MBX_SIZE) {
if ((aha_mbx[unit].mbi[i].stat != AHA_MBI_FREE )
&& (PHYSTOKV(_3btol(aha_mbx[unit].mbi[i].ccb_addr)
== (int)ccb))) {
aha_mbx[unit].mbi[i].stat = AHA_MBI_FREE;
aha_done(unit,ccb);
done++;
}
i++;
}
count--;
}
if(!count) {
printf("abort failed in wait\n");
ccb->mbx->cmd = AHA_MBO_FREE;
}
aha_free_ccb(unit,ccb,flags);
ahaintr(unit);
xs->error = XS_DRIVER_STUFFUP;
return(HAD_ERROR);
}
ahaintr(unit);
if(xs->error) return(HAD_ERROR);
return(COMPLETE);
}
/* return ??? */
}
/*
* try each speed in turn, when we find one that works, use
* the NEXT one for a safety margin, unless that doesn't exist
* or doesn't work. returns the nsec value of the time used
* or 0 if it could get a working speed ( or the NEXT speed
* failed)
* Go one slower to be safe, unless eisa at 100 ns.. trust it
*/
int
aha_set_bus_speed(int unit)
{
int retval, retval2;
int speed;
#ifdef EISA
speed = 0; /* start at the fastest */
#else EISA
speed = 1; /* 100 ns can crash some ISA busses (!?!) */
#endif EISA
while (1) {
retval = aha_bus_speed_check(unit, speed);
if(retval == HAD_ERROR) {
printf("no working bus speed!!!\n");
return 0;
}
if(retval == 0)
speed++;
else {
if(speed != 0)
speed++;
/*printf("%d nsec ok, but using ", retval);*/
retval2 = aha_bus_speed_check(unit, speed);
if(retval2 == HAD_ERROR) {
/*printf("marginal ");*/
retval2 = retval;
}
if(retval2) {
/*printf("%d nsec\n", retval2);*/
return retval2;
} else {
/*printf(".. slower failed, abort.\n", retval);*/
return 0;
}
}
}
}
/*
* 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 HAD_ERROR.
*/
static struct bus_speed {
char arg;
int nsecs;
} aha_bus_speeds[] = {
{0x88, 100},
{0x99, 150},
{0xaa, 200},
{0xbb, 250},
{0xcc, 300},
{0xdd, 350},
{0xee, 400},
{0xff, 450}
};
static char aha_test_string[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890abcdefghijklmnopqrstuvwxyz!@";
int
aha_bus_speed_check(int unit, int speed)
{
int numspeeds = sizeof(aha_bus_speeds)/sizeof(struct bus_speed);
u_char ad[3];
/*
* Check we have such an entry
*/
if(speed >= numspeeds) return(HAD_ERROR); /* illegal speed */
/*
* Set the dma-speed
*/
aha_cmd(unit,1, 0, 0, (u_char *)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
*/
strcpy((char *)aha_scratch_buf, (char *)aha_test_string);
lto3b(KVTOPHYS(aha_scratch_buf), ad);
aha_cmd(unit,3, 0, 0, (u_char *)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); /* 54 bytes transfered by test */
aha_cmd(unit,3, 0, 0, (u_char *)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
* if copy fails.. assume too fast
*/
if(strcmp(aha_test_string, (char *)aha_scratch_buf))
return(0);
return(aha_bus_speeds[speed].nsecs);
}
/*
* +----------+ +----------+ +----------+
* aha_soonest--->| later |--->| later|--->| later|-->0
* | [Delta] | | [Delta] | | [Delta] |
* 0<---|sooner |<---|sooner |<---|sooner |<---aha_latest
* +----------+ +----------+ +----------+
*
* aha_furtherest = sum(Delta[1..n])
*/
void
aha_add_timeout(struct aha_ccb *ccb, int time)
{
int timeprev;
struct aha_ccb *prev;
int s = splbio();
if(prev = aha_latest) /* yes, an assign */
timeprev = aha_furtherest;
else
timeprev = 0;
while(prev && (timeprev > time)) {
timeprev -= prev->delta;
prev = prev->sooner;
}
if(prev) {
ccb->delta = time - timeprev;
if( ccb->later = prev->later) {
ccb->later->sooner = ccb;
ccb->later->delta -= ccb->delta;
} else {
aha_furtherest = time;
aha_latest = ccb;
}
ccb->sooner = prev;
prev->later = ccb;
} else {
if( ccb->later = aha_soonest) {
ccb->later->sooner = ccb;
ccb->later->delta -= time;
} else {
aha_furtherest = time;
aha_latest = ccb;
}
ccb->delta = time;
ccb->sooner = (struct aha_ccb *)0;
aha_soonest = ccb;
}
splx(s);
}
void
aha_remove_timeout(struct aha_ccb *ccb)
{
int s = splbio();
if(ccb->sooner)
ccb->sooner->later = ccb->later;
else
aha_soonest = ccb->later;
if(ccb->later) {
ccb->later->sooner = ccb->sooner;
ccb->later->delta += ccb->delta;
} else {
aha_latest = ccb->sooner;
aha_furtherest -= ccb->delta;
}
ccb->sooner = ccb->later = (struct aha_ccb *)0;
splx(s);
}
extern int hz;
#define ONETICK 500 /* milliseconds */
#define SLEEPTIME ((hz * 1000) / ONETICK)
void
aha_timeout(int arg)
{
struct aha_ccb *ccb;
int unit;
int s = splbio();
while( ccb = aha_soonest ) {
if(ccb->delta <= ONETICK) {
/*
* It has timed out, we need to do some work
*/
unit = ccb->xfer->adapter;
printf("aha%d: device %d timed out ", unit,
ccb->xfer->targ);
/*
* Unlink it from the queue
*/
aha_remove_timeout(ccb);
/*
* If The ccb's mbx is not free, then
* the board has gone south
*/
if(ccb->mbx->cmd != AHA_MBO_FREE) {
printf("aha%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(" AGAIN\n");
ccb->xfer->retries = 0; /* I MEAN IT ! */
ccb->host_stat = AHA_ABORTED;
aha_done(unit,ccb);
} else {
/* abort the operation that has timed out */
printf("\n");
aha_abortmbx(ccb->mbx);
/* 2 secs for the abort */
aha_add_timeout(ccb,2000 + ONETICK);
ccb->flags = CCB_ABORTED;
}
} else {
/*
* It has not timed out, adjust and leave
*/
ccb->delta -= ONETICK;
aha_furtherest -= ONETICK;
break;
}
}
splx(s);
timeout((timeout_t)aha_timeout, (caddr_t)arg, SLEEPTIME);
}
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