d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
9fd5d9c917
freebsd-skq/sys/i386/isa/aha1542.c

1872 lines
45 KiB
C
Raw Blame History

/*
* (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 1.62 1996/09/10 23:30:48 bde Exp $
*/
/*
* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
*/
#include <sys/types.h>
#ifdef KERNEL /* don't laugh.. look for main() */
#include "aha.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <machine/clock.h>
#include <machine/stdarg.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <i386/isa/isa_device.h>
#endif /* KERNEL */
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#ifdef KERNEL
#include <sys/kernel.h>
#else /*KERNEL */
#define NAHA 1
#endif /*KERNEL */
/************************** board definitions *******************************/
/*
* I/O Port Interface
*/
#define AHA_BASE aha->aha_base
#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 */
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 */
/*
* 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 */
#define AHA_MBI_TGT_NO_CCB 0x10 /* Target received, no CCB ready */
/* 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 {
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 */
int flags;
#define CCB_FREE 0
#define CCB_ACTIVE 1
#define CCB_ABORTED 2
};
/*
* 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 */
#define AHA_INIT_RESID_CCB 0x03 /* SCSI Initiator CCB */
#define AHA_INIT_SG_RESID_CCB 0x04 /* SCSI initiator with scatter gather */
/*
* 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 */
/* 0x20 (' ') = BusLogic 545, but it gets
the command wrong, only returns
one byte */
/* 0x31 ('1') = AHA-1540 */
/* 0x41 ('A') = AHA-1540A/1542A/1542B */
/* 0x42 ('B') = AHA-1640 */
/* 0x43 ('C') = AHA-1542C */
/* 0x44 ('D') = AHA-1542CF */
/* 0x45 ('E') = AHA-1542CF, BIOS v2.01 */
/* 0x46 ('F') = AHA-1542CP, "Plug'nPlay" */
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 PHYSTOKV(x) (((long int)(x)) ^ aha->kv_phys_xor)
#define KVTOPHYS(x) vtophys(x)
#define AHA_DMA_PAGES AHA_NSEG
#define PAGESIZ 4096
#ifdef AHADEBUG
int aha_debug = 1;
#endif /*AHADEBUG */
static struct aha_data {
int aha_base; /* base port for each board */
/*
* xor this with a physaddr to get a kv addr and visa versa
* for items in THIS STRUCT only.
* Used to get the CCD's physical and kv addresses from each
* other.
*/
long int kv_phys_xor;
struct aha_mbx aha_mbx; /* all the mailboxes */
struct aha_ccb *aha_ccb_free; /* the next free ccb */
struct aha_ccb aha_ccb[AHA_MBX_SIZE]; /* all the CCBs */
int unit; /* unit number */
int aha_int; /* irq level */
int aha_dma; /* DMA req channel */
int aha_scsi_dev; /* scsi bus address */
int flags;
/* We use different op codes for different revs of the board
* if we think residual codes will work.
*/
short init_opcode; /* Command to use for initiator */
short sg_opcode; /* Command to use for scatter/gather */
struct scsi_link sc_link; /* prototype for subdevs */
} *ahadata[NAHA];
static u_int32_t aha_adapter_info __P((int unit));
static int ahaattach __P((struct isa_device *dev));
#ifdef TUNE_1542
static int aha_bus_speed_check __P((struct aha_data *aha, int speed));
static int aha_set_bus_speed __P((struct aha_data *aha));
#endif
static int aha_cmd __P((struct aha_data *aha, int icnt, int ocnt, int wait,
u_char *retval, u_char opcode, ...));
static void aha_done __P((struct aha_data *aha, struct aha_ccb *ccb));
static int aha_escape __P((struct scsi_xfer *xs, struct aha_ccb *ccb));
static void aha_free_ccb __P((struct aha_data *aha, struct aha_ccb *ccb,
int flags));
static struct aha_ccb *
aha_get_ccb __P((struct aha_data *aha, int flags));
static int aha_init __P((struct aha_data *aha));
static void ahaminphys __P((struct buf *bp));
static int aha_poll __P((struct aha_data *aha, struct scsi_xfer *xs,
struct aha_ccb *ccb));
static int ahaprobe __P((struct isa_device *dev));
static int32_t aha_scsi_cmd __P((struct scsi_xfer *xs));
static timeout_t
aha_timeout;
static char *board_rev __P((struct aha_data *aha, int type));
static int physcontig __P((int kv, int len));
static void put_host_stat __P((int host_stat));
#ifdef KERNEL
static struct scsi_adapter aha_switch =
{
aha_scsi_cmd,
ahaminphys,
0,
0,
aha_adapter_info,
"aha",
{ 0, 0 }
};
/* the below structure is so we have a default dev struct for out link struct */
static 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 */
"aha",
0,
{ 0, 0 }
};
struct isa_driver ahadriver =
{
ahaprobe,
ahaattach,
"aha"
};
#endif /* KERNEL */
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_RESET_TIMEOUT 2000 /* time to wait for reset (mSec) */
#ifndef KERNEL
main()
{
printf("size of aha_data is %d\n", sizeof(struct aha_data));
printf("size of aha_ccb is %d\n", sizeof(struct aha_ccb));
printf("size of aha_mbx is %d\n", sizeof(struct aha_mbx));
}
#else /*KERNEL */
/*
* aha_cmd(struct aha_data *aha,icnt, ocnt,wait, retval, opcode, ...)
* 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, etc
* ... : parameters to the command specified by opcode
*
* 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.
*
*/
static int
#ifdef __STDC__
aha_cmd(struct aha_data *aha, int icnt, int ocnt, int wait, u_char *retval,
u_char opcode, ... )
#else
aha_cmd(aha, icnt, ocnt, wait, retval, opcode, va_alist)
struct aha_data *aha,
int icnt,
int ocnt,
int wait,
u_char *retval,
u_char opcode,
va_dcl
#endif
{
va_list ap;
u_char oc;
u_char data;
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("aha%d: aha_cmd, host not idle(0x%x)\n",
aha->unit, 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.
*/
va_start(ap, opcode);
for(data = opcode; icnt >=0; icnt--, data = (u_char)va_arg(ap, int)) {
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 == 0) {
printf("aha%d: aha_cmd, cmd/data port full\n",
aha->unit);
outb(AHA_CTRL_STAT_PORT, AHA_SRST);
return (ENXIO);
}
outb(AHA_CMD_DATA_PORT, data);
}
/*
* 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 == 0) {
printf("aha%d: aha_cmd, cmd/data port empty %d\n",
aha->unit, ocnt);
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 == 0) {
printf("aha%d: aha_cmd, host not finished(0x%x)\n",
aha->unit, 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
*/
static int
ahaprobe(dev)
struct isa_device *dev;
{
int unit = ahaunit;
struct aha_data *aha;
/*
* find unit and check we have that many defined
*/
if (unit >= NAHA) {
printf("aha%d: unit number too high\n", unit);
return 0;
}
dev->id_unit = unit;
/*
* a quick safety check so we can be sleazy later
*/
if (sizeof(struct aha_data) > PAGESIZ) {
printf("aha struct > pagesize\n");
return 0;
}
/*
* Allocate a storage area for us
*/
if (ahadata[unit]) {
printf("aha%d: memory already allocated\n", unit);
return 0;
}
aha = malloc(sizeof(struct aha_data), M_TEMP, M_NOWAIT);
if (!aha) {
printf("aha%d: cannot malloc!\n", unit);
return 0;
}
bzero(aha, sizeof(struct aha_data));
ahadata[unit] = aha;
aha->aha_base = dev->id_iobase;
/*
* Try initialise a unit at this location
* sets up dma and bus speed, loads aha->aha_int
*/
if (aha_init(aha) != 0) {
ahadata[unit] = NULL;
free(aha, M_TEMP);
return 0;
}
/*
* Calculate the xor product of the aha struct's
* physical and virtual address. This allows us
* to change addresses within the structure
* from physical to virtual easily, as long as
* the structure is less than 1 page in size.
* This is used to recognise CCBs which are in
* this struct and which are refered to by the
* hardware using physical addresses.
* (assumes malloc returns a chunk that doesn't
* span pages)
* eventually use the hash table in aha1742.c
*/
aha->kv_phys_xor = (long int) aha ^ (KVTOPHYS(aha));
/*
* If it's there, put in it's interrupt vectors
*/
dev->id_irq = (1 << aha->aha_int);
dev->id_drq = aha->aha_dma;
ahaunit++;
return 0x4;
}
/*
* Attach all the sub-devices we can find
*/
static int
ahaattach(dev)
struct isa_device *dev;
{
int unit = dev->id_unit;
struct aha_data *aha = ahadata[unit];
struct scsibus_data *scbus;
/*
* fill in the prototype scsi_link.
*/
aha->sc_link.adapter_unit = unit;
aha->sc_link.adapter_targ = aha->aha_scsi_dev;
aha->sc_link.adapter_softc = aha;
aha->sc_link.adapter = &aha_switch;
aha->sc_link.device = &aha_dev;
aha->sc_link.flags = aha->flags;;
/*
* Prepare the scsibus_data area for the upperlevel
* scsi code.
*/
scbus = scsi_alloc_bus();
if(!scbus)
return 0;
scbus->adapter_link = &aha->sc_link;
/*
* ask the adapter what subunits are present
*/
scsi_attachdevs(scbus);
return 1;
}
/*
* Return some information to the caller about the adapter and its
* capabilities.
*/
static u_int32_t
aha_adapter_info(unit)
int unit;
{
return (2); /* 2 outstanding requests at a time per device */
}
/*
* Catch an interrupt from the adaptor
*/
void
ahaintr(unit)
int unit;
{
unsigned char stat;
register i;
struct aha_data *aha = ahadata[unit];
#ifdef AHADEBUG
printf("ahaintr ");
#endif /*AHADEBUG */
/*
* First acknowledge 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 (!(stat & AHA_MBIF))
return;
#ifdef AHADEBUG
printf("mbxin ");
#endif /*AHADEBUG */
/*
* If it IS then process the completed operation
*/
for (i = 0; i < AHA_MBX_SIZE; i++) {
struct aha_mbx_in *mbi = aha->aha_mbx.mbi + i;
if (mbi->stat != AHA_MBI_FREE) {
struct aha_ccb *ccb =
(struct aha_ccb *)PHYSTOKV(scsi_3btou(mbi->ccb_addr));
stat = mbi->stat;
switch (stat) {
case AHA_MBI_OK:
break;
case AHA_MBI_ABORT:
#ifdef AHADEBUG
if (aha_debug)
printf("abort");
#endif /*AHADEBUG */
ccb->host_stat = AHA_ABORTED;
break;
case AHA_MBI_TGT_NO_CCB:
/* We enabled target mode and received a SEND
* or RECEIVE command from the initiator, but
* we don't have any CCB registered to handle the command.
* At this point it would be nice to wakeup a
* process sleeping on this event via an ioctl,
* returning whether it is a SEND or RECEIVE and the
* required length.
* However, I want to look at the CAM documentation before
* I start extending the API at all.
*/
#ifdef NOISE_WHEN_TGT_NO_CDB
printf("Target received, but no CCB ready.\n");
printf("Initiator & lun: %02x\n", mbi->ccb_addr[0]);
printf("Max data length: %06x\n",
(mbi->ccb_addr[1] << 16) | (mbi->ccb_addr[2] << 8)
+ 255);
#endif
#ifdef AHADEBUG
if (aha_debug)
printf("target-no-ccb");
#endif /*AHADEBUG */
ccb = 0;
break;
case AHA_MBI_UNKNOWN:
ccb = 0;
#ifdef AHADEBUG
if (aha_debug)
printf("unknown ccb for abort ");
#endif /*AHADEBUG */
/* may have missed it */
/* no such ccb known for abort */
case AHA_MBI_ERROR:
/* XXX ccb is still set up? Driver fails without it? */
break;
default:
panic("Impossible mbxi status");
}
#ifdef AHADEBUG
if (aha_debug && ccb && stat != AHA_MBI_OK) {
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"
,mbi->stat, i);
printf("addr = 0x%x\n", ccb);
}
#endif /*AHADEBUG */
if (ccb) {
untimeout(aha_timeout, (caddr_t)ccb);
aha_done(aha, ccb);
}
mbi->stat = AHA_MBI_FREE;
}
}
}
/*
* A ccb (and hence a mbx-out) is put onto the
* free list.
*/
static void
aha_free_ccb(aha, ccb, flags)
struct aha_data *aha;
struct aha_ccb *ccb;
int flags;
{
unsigned int opri = 0;
if (!(flags & SCSI_NOMASK))
opri = splbio();
ccb->next = aha->aha_ccb_free;
aha->aha_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)&aha->aha_ccb_free);
}
if (!(flags & SCSI_NOMASK))
splx(opri);
}
/*
* Get a free ccb (and hence mbox-out entry)
*/
static struct aha_ccb *
aha_get_ccb(aha, flags)
struct aha_data *aha;
int flags;
{
unsigned opri = 0;
struct aha_ccb *rc;
if (!(flags & SCSI_NOMASK))
opri = splbio();
/*
* If we can and have to, sleep waiting for one
* to come free
*/
while ((!(rc = aha->aha_ccb_free)) && (!(flags & SCSI_NOSLEEP))) {
tsleep((caddr_t)&aha->aha_ccb_free, PRIBIO, "ahaccb", 0);
}
if (rc) {
aha->aha_ccb_free = aha->aha_ccb_free->next;
rc->flags = CCB_ACTIVE;
}
if (!(flags & SCSI_NOMASK))
splx(opri);
return (rc);
}
static void
put_host_stat(int host_stat)
{
int i;
struct { int host_stat; char *text; } tab[] = {
{ AHA_OK, "Cmd ok" },
{ AHA_LINK_OK, "Link cmd ok" },
{ AHA_LINK_IT, "Link cmd ok + int" },
{ AHA_SEL_TIMEOUT, "Selection time out" },
{ AHA_OVER_UNDER, "Data over/under run" },
{ AHA_BUS_FREE, "Bus dropped at unexpected time" },
{ AHA_INV_BUS, "Invalid bus phase/sequence" },
{ AHA_BAD_MBO, "Incorrect MBO cmd" },
{ AHA_BAD_CCB, "Incorrect ccb opcode" },
{ AHA_BAD_LINK, "Not same values of LUN for links" },
{ AHA_INV_TARGET, "Invalid target direction" },
{ AHA_CCB_DUP, "Duplicate CCB received" },
{ AHA_INV_CCB, "Invalid CCB or segment list" },
{ AHA_ABORTED, "Software abort" },
};
for (i = 0; i < sizeof(tab) / sizeof(tab[0]); i++) {
if (tab[i].host_stat == host_stat) {
printf("%s\n", tab[i].text);
return;
}
}
printf("Unknown host_stat %02x\n", host_stat);
}
/*
* 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
*/
static void
aha_done(aha, ccb)
struct aha_data *aha;
struct aha_ccb *ccb;
{
struct scsi_sense_data *s1, *s2;
struct scsi_xfer *xs = ccb->xfer;
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)) {
printf("aha%d: exiting but not in use!\n", aha->unit);
#ifdef DIAGNOSTIC
panic("aha1542 exiting but not in use");
#endif
}
xs->status = ccb->target_stat;
xs->resid = 0;
if (((ccb->host_stat != AHA_OK) || (ccb->target_stat != SCSI_OK))
&& ((xs->flags & SCSI_ERR_OK) == 0)) {
/*
* We have an error, that we cannot ignore.
*/
s1 = (struct scsi_sense_data *) (((char *) (&ccb->scsi_cmd))
+ ccb->scsi_cmd_length);
s2 = &(xs->sense);
if (ccb->host_stat) {
SC_DEBUG(xs->sc_link, SDEV_DB3, ("host err 0x%x\n",
ccb->host_stat));
switch (ccb->host_stat) {
case AHA_ABORTED:
xs->error = XS_TIMEOUT;
break;
case AHA_SEL_TIMEOUT:
xs->error = XS_SELTIMEOUT;
break;
case AHA_OVER_UNDER: /* Over run / under run */
switch(ccb->opcode)
{
case AHA_TARGET_CCB:
xs->resid = xs->datalen - scsi_3btoi(ccb->data_length);
xs->flags |= SCSI_RESID_VALID;
if (xs->resid <= 0)
xs->error = XS_LENGTH;
break;
case AHA_INIT_RESID_CCB:
case AHA_INIT_SG_RESID_CCB:
xs->resid = scsi_3btoi(ccb->data_length);
xs->flags |= SCSI_RESID_VALID;
if (xs->resid <= 0)
xs->error = XS_LENGTH;
break;
default:
xs->error = XS_LENGTH;
}
break;
default: /* Other scsi protocol messes */
xs->error = XS_DRIVER_STUFFUP;
printf("aha%d: ", aha->unit);
put_host_stat(ccb->host_stat);
}
} else {
SC_DEBUG(xs->sc_link, SDEV_DB3, ("target err 0x%x\n",
ccb->target_stat));
switch (ccb->target_stat) {
case 0x02:
/* structure copy!!!!! */
*s2 = *s1;
xs->error = XS_SENSE;
break;
case 0x08:
xs->error = XS_BUSY;
break;
default:
printf("aha%d:target_stat%x\n",
aha->unit, ccb->target_stat);
xs->error = XS_DRIVER_STUFFUP;
}
}
}
xs->flags |= ITSDONE;
aha_free_ccb(aha, ccb, xs->flags);
scsi_done(xs);
}
/* Macro to determine that a rev is potentially a new valid one
* so that the driver doesn't keep breaking on new revs as it
* did for the CF and CP.
*/
#define PROBABLY_NEW_BOARD(REV) (REV > 0x43 && REV < 0x56)
static char *board_rev(struct aha_data *aha, int type)
{
switch(type)
{
case 0x20: return "Buslogic 545?";
case 0x31: return "AHA-1540";
case 0x41: return "AHA-154x[AB]";
case 0x42: return "AHA-1640";
case 0x43: return "AHA-1542C";
case 0x44: return "AHA-1542CF";
case 0x45: return "AHA-1542CF BIOS v2.01";
case 0x46: return "AHA-1542CP";
default:
if (PROBABLY_NEW_BOARD(type))
{
printf("aha%d: Assuming type %02x is a new board.\n",
aha->unit, type);
return "New Adaptec rev?";
}
printf("aha%d: type %02x is an unknown board.\n",
aha->unit, type);
return "Unknown board";
}
}
/*
* Start the board, ready for normal operation
*/
static int
aha_init(aha)
struct aha_data *aha;
{
char *desc;
unsigned char ad[3];
volatile int i, sts;
struct aha_config conf;
struct aha_inquire inquire;
struct aha_extbios extbios;
/* Assume that residual codes don't work. If they
* do we enable that after we figure out what kind of
* board it is.
*/
aha->init_opcode = AHA_INITIATOR_CCB;
aha->sg_opcode = AHA_INIT_SCAT_GATH_CCB;
/*
* 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 */
}
#ifdef AHADEBUG
printf("aha_init: AHA_RESET_TIMEOUT went to %d\n", i);
#endif /* AHADEBUG */
if (i == 0) {
#ifdef AHADEBUG
if (aha_debug)
printf("aha_init: No answer from 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 AHA_INQUIRE
* command fails, blatter about it, nuke the boardid so the 1542C
* stuff gets skipped over, and reset the board again.
*/
if(aha_cmd(aha, 0, sizeof(inquire), 1,
(u_char *)&inquire, AHA_INQUIRE)) {
/*
* Blah.. not a real adaptec board!!!
* Seems that the Buslogic 545S and the DTC3290 both get
* this wrong.
*/
printf ("aha%d: not a REAL adaptec board, may cause warnings\n",
aha->unit);
inquire.boardid = 0;
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 */
}
#ifdef AHADEBUG
printf("aha_init2: AHA_RESET_TIMEOUT went to %d\n", i);
#endif /* AHADEBUG */
if (i == 0) {
#ifdef AHADEBUG
if (aha_debug)
printf("aha_init2: No answer from board\n");
#endif /*AHADEBUG */
return (ENXIO);
}
}
#ifdef AHADEBUG
printf("aha%d: inquire %x, %x, %x, %x\n",
aha->unit,
inquire.boardid, inquire.spec_opts,
inquire.revision_1, inquire.revision_2);
#endif /* AHADEBUG */
aha->flags = SDEV_BOUNCE;
#define PRVERBOSE(x) if (bootverbose) printf x
/*
* If we are a new type of 1542 board (anything newer than a 1542C)
* then disable the extended bios so that the
* mailbox interface is unlocked.
* This is also true for the 1542B Version 3.20. First Adaptec
* board that supports >1Gb drives.
* No need to check the extended bios flags as some of the
* extensions that cause us problems are not flagged in that byte.
*/
desc = board_rev(aha, inquire.boardid);
PRVERBOSE( ("aha%d: Rev %02x (%s) V%c.%c",
aha->unit, inquire.boardid, desc, inquire.revision_1,
inquire.revision_2) );
if (PROBABLY_NEW_BOARD(inquire.boardid) ||
(inquire.boardid == 0x41
&& inquire.revision_1 == 0x31 && inquire.revision_2 == 0x34)) {
aha_cmd(aha, 0, sizeof(extbios), 0,
(u_char *)&extbios, AHA_EXT_BIOS);
#ifdef AHADEBUG
printf("aha%d: extended bios flags %x\n", aha->unit, extbios.flags);
#endif /* AHADEBUG */
PRVERBOSE( (", enabling mailbox") );
aha_cmd(aha, 2, 0, 0, 0, AHA_MBX_ENABLE,
0, extbios.mailboxlock);
}
/* Which boards support residuals? Some early 1542A's apparently
* don't. The 1542B with V0.5 of the software does, so I've
* arbitrarily set that as the earliest rev.
*/
if (PROBABLY_NEW_BOARD(inquire.boardid) ||
(inquire.boardid == 0x41
&& (inquire.revision_1 > '0' || inquire.revision_2 >= '5'))) {
PRVERBOSE( (", enabling residuals") );
aha->init_opcode = AHA_INIT_RESID_CCB;
aha->sg_opcode = AHA_INIT_SG_RESID_CCB;
}
/* Which boards support target operations? The 1542C completely
* locks up the SCSI bus if you enable them. I'm only sure
* about the B, which was sold in the OEM market as a target
* board.
*/
if (inquire.boardid == 0x41) {
PRVERBOSE( (", target ops") );
aha->flags |= SDEV_TARGET_OPS;
}
PRVERBOSE( ("\n") );
/*
* setup dma channel from jumpers and save int
* level
*/
PRVERBOSE(("aha%d: reading board settings, ", aha->unit));
if (inquire.boardid == 0x20) {
DELAY(1000); /* for Bustek 545 */
}
aha_cmd(aha, 0, sizeof(conf), 0, (u_char *)&conf, AHA_CONF_GET);
switch (conf.chan) {
case CHAN0:
outb(0x0b, 0x0c);
outb(0x0a, 0x00);
aha->aha_dma = 0;
break;
case CHAN5:
outb(0xd6, 0xc1);
outb(0xd4, 0x01);
aha->aha_dma = 5;
break;
case CHAN6:
outb(0xd6, 0xc2);
outb(0xd4, 0x02);
aha->aha_dma = 6;
break;
case CHAN7:
outb(0xd6, 0xc3);
outb(0xd4, 0x03);
aha->aha_dma = 7;
break;
default:
printf("aha%d: illegal dma jumper setting\n", aha->unit);
return (EIO);
}
PRVERBOSE( ("dma=%d ", aha->aha_dma) );
switch (conf.intr) {
case INT9:
aha->aha_int = 9;
break;
case INT10:
aha->aha_int = 10;
break;
case INT11:
aha->aha_int = 11;
break;
case INT12:
aha->aha_int = 12;
break;
case INT14:
aha->aha_int = 14;
break;
case INT15:
aha->aha_int = 15;
break;
default:
printf("aha%d: illegal int jumper setting\n", aha->unit);
return (EIO);
}
PRVERBOSE( ("int=%d ", aha->aha_int) );
/* who are we on the scsi bus? */
aha->aha_scsi_dev = conf.scsi_dev;
PRVERBOSE( ("id=%d ", aha->aha_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
/*
* Initialize memory transfer speed
* Not compiled in by default because it breaks some machines
*/
if (!(aha_set_bus_speed(aha))) {
return (EIO);
}
#else
PRVERBOSE( (" (bus speed defaulted)\n") );
#endif /*TUNE_1542*/
/*
* Initialize mail box
*/
scsi_uto3b(KVTOPHYS(&aha->aha_mbx), ad);
aha_cmd(aha, 4, 0, 0, 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
* this is a kludge but it works
*/
for (i = 0; i < AHA_MBX_SIZE; i++) {
aha->aha_ccb[i].next = aha->aha_ccb_free;
aha->aha_ccb_free = &aha->aha_ccb[i];
aha->aha_ccb_free->flags = CCB_FREE;
aha->aha_ccb_free->mbx = &aha->aha_mbx.mbo[i];
scsi_uto3b(KVTOPHYS(aha->aha_ccb_free), aha->aha_mbx.mbo[i].ccb_addr);
}
/*
* Note that we are going and return (to probe)
*/
return 0;
}
static void
ahaminphys(bp)
struct buf *bp;
{
/* 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 */
if (bp->b_bcount > ((AHA_NSEG - 1) * PAGESIZ)) {
bp->b_bcount = ((AHA_NSEG - 1) * PAGESIZ);
}
}
static int
aha_escape(xs, ccb)
struct scsi_xfer *xs;
struct aha_ccb *ccb;
{
int ret = 0;
int s;
if (xs->cmd)
{
switch(xs->cmd->opcode)
{
case SCSI_OP_RESET:
ccb->opcode = AHA_RESET_CCB;
ret = 0;
break;
case SCSI_OP_TARGET:
s= splbio();
aha_cmd((struct aha_data *)xs->sc_link->adapter_softc,
2, 0, 0, 0, AHA_TARGET_EN,
(int)xs->cmd->bytes[0], (int)1);
splx(s);
ret = COMPLETE;
break;
default:
ret = ESCAPE_NOT_SUPPORTED;
break;
}
}
else
{
ccb->opcode = AHA_RESET_CCB;
ret = 0;
}
return ret;
}
#define physdb(ARG) (void)(ARG)
/* physcontig: Scan forward from a KV and return length to the
* end of physically contiguous addresses. This belongs in
* i386/.../something_or_other.c
* XXX: Find the right thing in the kernel.
*/
static int physcontig(int kv, int len)
{
int len_was = len;
u_long kvl = (u_long)kv;
int phys_len;
u_long phys, prev_phys;
prev_phys = KVTOPHYS(kvl);
/* We go at least to the end of this page:
*/
phys_len = PAGESIZ - (prev_phys & (PAGESIZ - 1));
len -= phys_len;
kvl += phys_len;
prev_phys &= ~(PAGESIZ - 1);
while (len > 0)
{
phys = KVTOPHYS(kvl);
if (phys != prev_phys + PAGESIZ)
{
physdb(("phys %08x != prev_phys %08x + PAGESIZ\n",
phys, prev_phys));
break;
}
prev_phys = phys;
kvl += PAGESIZ;
len -= PAGESIZ;
}
phys_len = (len < 0) ? len_was : (len_was - len);
physdb(("physcontig(%08x, %d) = %d\n", kv, len_was, phys_len));
return phys_len;
}
/*
* start a scsi operation given the command and
* the data address. Also needs the unit, target
* and lu
*/
static int32_t
aha_scsi_cmd(xs)
struct scsi_xfer *xs;
{
struct scsi_link *sc_link = xs->sc_link;
struct aha_data *aha;
struct aha_ccb *ccb;
struct aha_scat_gath *sg;
int seg; /* scatter gather seg being worked on */
int thiskv;
int thisphys, nextphys;
int bytes_this_seg, bytes_this_page, datalen, flags;
int s;
aha = (struct aha_data *)sc_link->adapter_softc;
SC_DEBUG(xs->sc_link, SDEV_DB2, ("aha_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 (!(ccb = aha_get_ccb(aha, flags))) {
xs->error = XS_DRIVER_STUFFUP;
return (TRY_AGAIN_LATER);
}
if (ccb->mbx->cmd != AHA_MBO_FREE)
printf("aha%d: MBO %02x and not %02x (free)\n",
aha->unit, ccb->mbx->cmd, AHA_MBO_FREE);
/*
* Put all the arguments for the xfer in the ccb
*/
ccb->xfer = xs;
if (flags & SCSI_RESET) {
ccb->opcode = AHA_RESET_CCB;
} else {
/* can't use S/G if zero length */
ccb->opcode = (xs->datalen ?
aha->sg_opcode
: aha->init_opcode);
}
ccb->target = sc_link->target;
ccb->data_out = 0;
ccb->data_in = 0;
ccb->lun = sc_link->lun;
ccb->scsi_cmd_length = xs->cmdlen;
/* Some devices (e.g, Microtek ScanMaker II)
* fall on the ground if you ask for anything but
* an exact number of sense bytes (wiping out the
* sense data)
* XXX: This was lost at some point in scsi_ioctl.c.
*/
ccb->req_sense_length = (xs->req_sense_length)
? xs->req_sense_length
: sizeof(ccb->scsi_sense);
/* XXX: I propose we move the reset handling into the escape
* handling.
*/
if (flags & SCSI_RESET) {
flags |= SCSI_ESCAPE;
xs->cmd->opcode = SCSI_OP_RESET;
}
/* Set up the CCB. For an escape function, the escape hook may
* set it up for us.
*/
if (flags & SCSI_ESCAPE) {
int ret;
ret = aha_escape(xs, ccb);
if (ret)
return ret;
}
else if (flags & SCSI_TARGET)
{
ccb->opcode = AHA_TARGET_CCB;
/* These must be set up for target mode:
*/
if (flags & SCSI_DATA_IN)
ccb->data_in = 1;
if (flags & SCSI_DATA_OUT)
ccb->data_out = 1;
}
else
{
ccb->opcode = (xs->datalen? /* can't use S/G if zero length */
AHA_INIT_SCAT_GATH_CCB
:AHA_INITIATOR_CCB);
}
switch(ccb->opcode)
{
case AHA_TARGET_CCB:
if (xs->data)
scsi_uto3b(KVTOPHYS((int)xs->data), ccb->data_addr);
else
scsi_uto3b(0, ccb->data_addr);
/* For non scatter-gather I/O (and Target mode doesn't do
* scatter-gather) we need to truncate the transfer
* at the first non consecutive physical address.
*/
scsi_uto3b(physcontig((int)xs->data, xs->datalen), ccb->data_length);
break;
/* This should be folded in with TARGET_CCB once
* physcontig is debugged.
*/
case AHA_INITIATOR_CCB:
case AHA_INIT_RESID_CCB:
if (xs->data)
scsi_uto3b(KVTOPHYS((int)xs->data), ccb->data_addr);
else
scsi_uto3b(0, ccb->data_addr);
scsi_uto3b(xs->datalen, ccb->data_length);
break;
case AHA_RESET_CCB:
scsi_uto3b(0, ccb->data_addr);
scsi_uto3b(0, ccb->data_length);
break;
case AHA_INIT_SCAT_GATH_CCB:
case AHA_INIT_SG_RESID_CCB:
scsi_uto3b(KVTOPHYS(ccb->scat_gath), ccb->data_addr );
sg = ccb->scat_gath ;
seg = 0;
#ifdef TFS_ONLY
if (flags & SCSI_DATA_UIO) {
iovp = ((struct uio *) xs->data)->uio_iov;
datalen = ((struct uio *) xs->data)->uio_iovcnt;
while ((datalen) && (seg < AHA_NSEG)) {
scsi_uto3b(iovp->iov_base, sg->seg_addr);
scsi_uto3b(iovp->iov_len, sg->seg_len);
SC_DEBUGN(xs->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(xs->sc_link, SDEV_DB4,
("%ld @%p:- ", 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 */
scsi_uto3b(thisphys, sg->seg_addr);
SC_DEBUGN(xs->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("aha%d: DMA beyond"
" end Of ISA: 0x%x\n",
aha->unit, thisphys);
xs->error = XS_DRIVER_STUFFUP;
aha_free_ccb(aha, ccb, flags);
return (HAD_ERROR);
}
/** how far to the end of the page ***/
nextphys = (thisphys & (~(PAGESIZ - 1)))
+ PAGESIZ;
bytes_this_page = nextphys - thisphys;
/**** or the data ****/
bytes_this_page = min(bytes_this_page
,datalen);
bytes_this_seg += bytes_this_page;
datalen -= bytes_this_page;
/**** get more ready for the next page ****/
thiskv = (thiskv & (~(PAGESIZ - 1)))
+ PAGESIZ;
if (datalen)
thisphys = KVTOPHYS(thiskv);
}
/*
* next page isn't contiguous, finish the seg
*/
SC_DEBUGN(xs->sc_link, SDEV_DB4,
("(0x%x)", bytes_this_seg));
scsi_uto3b(bytes_this_seg, sg->seg_len);
sg++;
seg++;
}
}
scsi_uto3b(seg * sizeof(struct aha_scat_gath), ccb->data_length);
SC_DEBUGN(xs->sc_link, SDEV_DB4, ("\n"));
if (datalen) { /* there's still data, must have run out of segs! */
printf("aha%d: aha_scsi_cmd, more than %d DMA segs\n",
aha->unit, AHA_NSEG);
xs->error = XS_DRIVER_STUFFUP;
aha_free_ccb(aha, ccb, flags);
return (HAD_ERROR);
}
break;
default:
printf("aha_scsi_cmd%d: Illegal CCB opcode.\n", aha->unit);
xs->error = XS_DRIVER_STUFFUP;
aha_free_ccb(aha,ccb,flags);
return HAD_ERROR;
}
scsi_uto3b(0, ccb->link_addr);
/*
* Put the scsi command in the ccb and start it
*/
if (!(flags & SCSI_ESCAPE))
bcopy(xs->cmd, &ccb->scsi_cmd, ccb->scsi_cmd_length);
if (!(flags & SCSI_NOMASK)) {
s = splbio(); /* stop instant timeouts */
timeout(aha_timeout, (caddr_t)ccb, (xs->timeout * hz) / 1000);
aha_startmbx(ccb->mbx);
/*
* Usually return SUCCESSFULLY QUEUED
*/
splx(s);
SC_DEBUG(xs->sc_link, SDEV_DB3, ("sent\n"));
return (SUCCESSFULLY_QUEUED);
}
aha_startmbx(ccb->mbx);
SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd sent, waiting\n"));
/*
* If we can't use interrupts, poll on completion
*/
return (aha_poll(aha, xs, ccb)); /* only during boot */
}
/*
* Poll a particular unit, looking for a particular xs
*/
static int
aha_poll(aha, xs, ccb)
struct aha_data *aha;
struct scsi_xfer *xs;
struct aha_ccb *ccb;
{
int count = xs->timeout;
u_char stat;
/*timeouts are in msec, so we loop in 1000uSec cycles */
while (count) {
/*
* If we had interrupts enabled, would we
* have got an interrupt?
*/
stat = inb(AHA_INTR_PORT);
if (stat & AHA_ANY_INTR) {
ahaintr(aha->unit);
}
if (xs->flags & ITSDONE) {
break;
}
DELAY(1000); /* only happens in boot so ok */
count--;
}
if (count == 0) {
/*
* We timed out, so call the timeout handler
* manually, accout for the fact that the
* clock is not running yet by taking out the
* clock queue entry it makes
*/
aha_timeout((caddr_t)ccb);
/*
* because we are polling,
* take out the timeout entry aha_timeout made
*/
untimeout(aha_timeout, (caddr_t)ccb);
count = 2000;
while (count) {
/*
* Once again, wait for the int bit
*/
stat = inb(AHA_INTR_PORT);
if (stat & AHA_ANY_INTR) {
ahaintr(aha->unit);
}
if (xs->flags & ITSDONE) {
break;
}
DELAY(1000); /* only happens in boot so ok */
count--;
}
if (count == 0) {
/*
* We timed out again.. this is bad
* Notice that this time there is no
* clock queue entry to remove
*/
aha_timeout((caddr_t)ccb);
}
}
if (xs->error)
return (HAD_ERROR);
return (COMPLETE);
}
#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
{
char arg;
int nsecs;
}aha_bus_speeds[] =
{
{0x88,100},
{0x99,150},
{0xaa,200},
{0xbb,250},
{0xcc,300},
{0xdd,350},
{0xee,400},
{0xff,450}
};
static int
aha_set_bus_speed(aha)
struct aha_data *aha;
{
int speed;
int lastworking;
int retval,retval2;
lastworking = -1;
speed = 7;
while (1) {
retval = aha_bus_speed_check(aha,speed);
if(retval != 0) {
lastworking = speed;
}
if((retval == 0) || (speed == 0)) {
if(lastworking == -1) {
printf("No working bus speed for aha154X\n");
return 0;
}
printf("%d nSEC ok, using "
,aha_bus_speeds[lastworking].nsecs);
if(lastworking == 7) { /* is slowest already */
printf("marginal ");
} else {
lastworking++;
}
retval2 = aha_bus_speed_check(aha,lastworking);
if(retval2 == 0) {
printf("test retry failed.. aborting.\n");
return 0;
}
printf("%d nSEC\n",retval2);
return retval2 ;
}
speed--;
}
}
/*
* 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 char aha_test_string[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890abcdefghijklmnopqrstuvwxyz!@";
u_char aha_scratch_buf[256];
static int
aha_bus_speed_check(aha, speed)
struct aha_data *aha;
int speed;
{
int numspeeds = sizeof(aha_bus_speeds) / sizeof(struct bus_speed);
int loopcount;
u_char ad[3];
/*
* Check we have such an entry
*/
if (speed >= numspeeds)
return (HAD_ERROR); /* illegal speed */
/*
* 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
*/
scsi_uto3b(KVTOPHYS(aha_scratch_buf), ad);
for(loopcount = 2000;loopcount;loopcount--)
{
strcpy(aha_scratch_buf, aha_test_string);
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); /* 54 bytes transfered by test */
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
*/
if (strcmp(aha_test_string, aha_scratch_buf))
return 0; /* failed test */
}
/* copy succeded assume speed ok */
return (aha_bus_speeds[speed].nsecs);
}
#endif /*TUNE_1542*/
static void
aha_timeout(void *arg1)
{
struct aha_ccb * ccb = (struct aha_ccb *)arg1;
int s = splbio();
struct aha_data *aha;
aha = (struct aha_data *)ccb->xfer->sc_link->adapter_softc;
sc_print_addr(ccb->xfer->sc_link);
printf("timed out ");
/*
* If The ccb's mbx is not free, then
* the board has gone south
*/
if (ccb->mbx->cmd != AHA_MBO_FREE) {
printf("\nadapter not taking commands.. frozen?!\n");
#ifdef DIAGNOSTIC
panic("aha1542 frozen");
#endif
}
/*
* 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(aha, ccb);
} else {
/* abort the operation that has timed out */
printf("\n");
aha_abortmbx(ccb->mbx);
/* 4 secs for the abort */
timeout(aha_timeout, (caddr_t)ccb, 4 * hz);
ccb->flags = CCB_ABORTED;
} splx(s);
}
#endif /* KERNEL */
Reference in New Issue View Git Blame Copy Permalink