* (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 1.20 1994/01/22 21:54:10 rgrimes Exp $
* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
#ifdef KERNEL /* don't laugh.. look for main() */
#include <i386/isa/isa_device.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
/************************** board definitions *******************************/
#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 */
* 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 */
#define AHA_MBX_SIZE 16 /* mail box size */
unsigned char ccb_addr
[3];
unsigned char ccb_addr
[3];
#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 */
/* 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) */
unsigned char data_in
:1; /* must be 0 */
unsigned char data_out
:1; /* must be 0 */
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 target_stat
;
unsigned char reserved
[2];
struct scsi_generic scsi_cmd
;
struct scsi_sense_data scsi_sense
;
unsigned char seg_len
[3];
unsigned char seg_addr
[3];
struct scsi_xfer
*xfer
; /* the scsi_xfer for this cmd */
struct aha_mbx_out
*mbx
; /* pointer to mail box */
#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 */
u_char boardid
; /* type of board */
/* 0x20 = BusLogic 545, but it gets
the command wrong, only returns
/* 0x41 = AHA-1540A/1542A/1542B */
/* 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] */
u_char flags
; /* Bit 3 == 1 extended bios enabled */
u_char mailboxlock
; /* mail box lock code to unlock it */
/*********************************** 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 INVALIDATE_CACHE {asm volatile( ".byte 0x0F ;.byte 0x08" ); }
u_char aha_scratch_buf
[256];
short 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
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 aha_int
; /* our irq level */
int aha_dma
; /* out DMA req channel */
int aha_scsi_dev
; /* ourscsi bus address */
struct scsi_link sc_link
; /* prototype for subdevs */
struct aha_ccb
*aha_get_ccb();
void aha_timeout(caddr_t
, int);
u_int32
aha_adapter_info();
struct scsi_adapter aha_switch
=
/* 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 */
struct isa_driver ahadriver
=
#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) */
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
));
* aha_cmd(unit,icnt, ocnt,wait, retval, opcode, args)
* Activate Adapter command
* icnt: number of args (outbound bytes written after opcode)
* ocnt: number of expected returned bytes
* wait: number of seconds to wait for response
* retval: buffer where to place returned bytes
* opcode: opcode AHA_NOP, AHA_MBX_INIT, AHA_START_SCSI ...
* 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.
aha_cmd(unit
, icnt
, ocnt
, wait
, retval
, opcode
, args
)
struct aha_data
*aha
= ahadata
[unit
];
* multiply the wait argument by a big constant
* zero defaults to 1 sec..
* all wait loops are in 50uSec cycles
* 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 */
sts
= inb(AHA_CTRL_STAT_PORT
);
printf("aha%d: aha_cmd, host not idle(0x%x)\n",
* Now that it is idle, if we expect output, preflush the
while ((inb(AHA_CTRL_STAT_PORT
)) & AHA_DF
)
* Output the command and the number of arguments given
* for each byte, first check the port is empty.
/* include the command */
sts
= inb(AHA_CTRL_STAT_PORT
);
sts
= inb(AHA_CTRL_STAT_PORT
);
printf("aha%d: aha_cmd, cmd/data port full\n", unit
);
outb(AHA_CTRL_STAT_PORT
, AHA_SRST
);
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
sts
= inb(AHA_CTRL_STAT_PORT
);
sts
= inb(AHA_CTRL_STAT_PORT
);
printf("aha%d: aha_cmd, cmd/data port empty %d\n",
oc
= inb(AHA_CMD_DATA_PORT
);
* Wait for the board to report a finised instruction
sts
= inb(AHA_INTR_PORT
);
printf("aha%d: aha_cmd, host not finished(0x%x)\n", unit
, sts
);
outb(AHA_CTRL_STAT_PORT
, AHA_IRST
);
* 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
* find unit and check we have that many defined
printf("aha%d: unit number too high\n", unit
);
* a quick safety check so we can be sleazy later
if (sizeof(struct aha_data
) > PAGESIZ
) {
printf("aha struct > pagesize\n");
* Allocate a storage area for us
printf("aha%d: memory already allocated\n", unit
);
aha
= malloc(sizeof(struct aha_data
), M_TEMP
, M_NOWAIT
);
printf("aha%d: cannot malloc!\n", unit
);
bzero(aha
, sizeof(struct aha_data
));
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(unit
) != 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
* 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
;
* Attach all the sub-devices we can find
struct aha_data
*aha
= ahadata
[unit
];
* 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
= &aha_switch
;
aha
->sc_link
.device
= &aha_dev
;
* ask the adapter what subunits are present
scsi_attachdevs(&(aha
->sc_link
));
* Return some information to the caller about the adapter and its
return (2); /* 2 outstanding requests at a time per device */
* Catch an interrupt from the adaptor
struct aha_data
*aha
= ahadata
[unit
];
* 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 it IS then process the competed operation
for (i
= 0; i
< AHA_MBX_SIZE
; i
++) {
if (aha
->aha_mbx
.mbi
[i
].stat
!= AHA_MBI_FREE
) {
ccb
= (struct aha_ccb
*) PHYSTOKV(
(_3btol(aha
->aha_mbx
.mbi
[i
].ccb_addr
)));
if ((stat
= aha
->aha_mbx
.mbi
[i
].stat
) != AHA_MBI_OK
) {
ccb
->host_stat
= AHA_ABORTED
;
ccb
= (struct aha_ccb
*) 0;
printf("unknown ccb for abort ");
/* no such ccb known for abort */
panic("Impossible mbxi status");
cp
= (u_char
*) (&(ccb
->scsi_cmd
));
printf("op=%x %x %x %x %x %x\n",
printf("stat %x for mbi[%d]\n"
,aha
->aha_mbx
.mbi
[i
].stat
, i
);
printf("addr = 0x%x\n", ccb
);
untimeout(aha_timeout
, (caddr_t
)ccb
);
aha
->aha_mbx
.mbi
[i
].stat
= AHA_MBI_FREE
;
* A ccb (and hence a mbx-out is put onto the
aha_free_ccb(unit
, ccb
, flags
)
struct aha_data
*aha
= ahadata
[unit
];
if (!(flags
& SCSI_NOMASK
))
ccb
->next
= aha
->aha_ccb_free
;
* If there were none, wake anybody waiting for
* one to come free, starting with queued entries
wakeup((caddr_t
)&aha
->aha_ccb_free
);
if (!(flags
& SCSI_NOMASK
))
* Get a free ccb (and hence mbox-out entry)
struct aha_data
*aha
= ahadata
[unit
];
if (!(flags
& SCSI_NOMASK
))
* If we can and have to, sleep waiting for one
while ((!(rc
= aha
->aha_ccb_free
)) && (!(flags
& SCSI_NOSLEEP
))) {
sleep(&aha
->aha_ccb_free
, PRIBIO
);
aha
->aha_ccb_free
= aha
->aha_ccb_free
->next
;
if (!(flags
& SCSI_NOMASK
))
* 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
struct aha_data
*aha
= ahadata
[unit
];
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", unit
);
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
))
SC_DEBUG(xs
->sc_link
, SDEV_DB3
, ("host err 0x%x\n",
switch (ccb
->host_stat
) {
case AHA_SEL_TIMEOUT
: /* No response */
default: /* Other scsi protocol messes */
xs
->error
= XS_DRIVER_STUFFUP
;
printf("aha%d:host_stat%x\n",
SC_DEBUG(xs
->sc_link
, SDEV_DB3
, ("target err 0x%x\n",
switch (ccb
->target_stat
) {
/* structure copy!!!!! */
printf("aha%d:target_stat%x\n",
xs
->error
= XS_DRIVER_STUFFUP
;
/* All went correctly OR errors expected */
aha_free_ccb(unit
, ccb
, xs
->flags
);
* Start the board, ready for normal operation
struct aha_data
*aha
= ahadata
[unit
];
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
))
DELAY(1000); /* calibrated in msec */
printf("aha_init: No answer from adaptec board\n");
* Assume we have a board at this stage, do an adapter inquire
* to find out what type of controller it is
aha_cmd(unit
, 0, sizeof(inquire
), 1 ,&inquire
, AHA_INQUIRE
);
printf("aha%d: inquire %x, %x, %x, %x\n",
inquire
.boardid
, inquire
.spec_opts
,
inquire
.revision_1
, inquire
.revision_2
);
* XXX The Buslogic 545S gets the AHA_INQUIRE command wrong,
* they only return one byte which causes us to print an error,
* so if the boardid comes back as 0x20, tell the user why they
* get the "cmd/data port empty" message
if (inquire
.boardid
== 0x20) {
/* looks like a Buslogic 545 */
printf ("aha%d: above cmd/data port empty do to Buslogic 545\n",
* 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(unit
, 0, sizeof(extbios
), 0, &extbios
, AHA_EXT_BIOS
);
printf("aha%d: extended bios flags %x\n", unit
, extbios
.flags
);
printf("aha%d: 1542C/CF detected, unlocking mailbox\n");
aha_cmd(unit
, 2, 0, 0, 0, AHA_MBX_ENABLE
,
* setup dma channel from jumpers and save int
printf("aha%d: reading board settings, ", unit
);
#define PRNT(x) printf(x)
DELAY(1000); /* for Bustek 545 */
aha_cmd(unit
, 0, sizeof(conf
), 0, &conf
, AHA_CONF_GET
);
printf("illegal dma jumper setting\n");
printf("illegal int jumper setting\n");
/* 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(unit
, 1, 0, 0, 0, AHA_BUS_ON_TIME_SET
, 7);
aha_cmd(unit
, 1, 0, 0, 0, AHA_BUS_OFF_TIME_SET
, 4);
* Initialize memory transfer speed
* Not compiled in by default because it breaks some machines
if (!(aha_set_bus_speed(unit
))) {
lto3b(KVTOPHYS(&aha
->aha_mbx
), ad
);
aha_cmd(unit
, 4, 0, 0, 0, AHA_MBX_INIT
,
* link the ccb's with the mbox-out entries and
* 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
];
lto3b(KVTOPHYS(aha
->aha_ccb_free
), aha
->aha_mbx
.mbo
[i
].ccb_addr
);
* Note that we are going and return (to probe)
/* 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
);
* start a scsi operation given the command and
* the data address. Also needs the unit, target
struct scsi_link
*sc_link
= xs
->sc_link
;
int unit
= sc_link
->adapter_unit
;
struct aha_data
*aha
= ahadata
[unit
];
struct scsi_sense_data
*s1
, *s2
;
struct aha_scat_gath
*sg
;
int seg
; /* scatter gather seg being worked on */
int bytes_this_seg
, bytes_this_page
, datalen
, flags
;
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
if (!(ccb
= aha_get_ccb(unit
, flags
))) {
xs
->error
= XS_DRIVER_STUFFUP
;
return (TRY_AGAIN_LATER
);
if (ccb
->mbx
->cmd
!= AHA_MBO_FREE
)
printf("aha%d: MBO not free\n", unit
);
* Put all the arguments for the xfer in the ccb
if (flags
& SCSI_RESET
) {
ccb
->opcode
= AHA_RESET_CCB
;
/* can't use S/G if zero length */
ccb
->opcode
= (xs
->datalen
?
ccb
->target
= sc_link
->target
;
ccb
->scsi_cmd_length
= xs
->cmdlen
;
ccb
->req_sense_length
= sizeof(ccb
->scsi_sense
);
if ((xs
->datalen
) && (!(flags
& SCSI_RESET
))) {
/* can use S/G only if not zero length */
lto3b(KVTOPHYS(ccb
->scat_gath
), ccb
->data_addr
);
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(iovp
->iov_base
, sg
->seg_addr
);
lto3b(iovp
->iov_len
, sg
->seg_len
);
SC_DEBUGN(xs
->sc_link
, SDEV_DB4
, ("UIO(0x%x@0x%x)"
* Set up the scatter gather block
SC_DEBUG(xs
->sc_link
, SDEV_DB4
,
("%d @0x%x:- ", xs
->datalen
, xs
->data
));
thisphys
= KVTOPHYS(thiskv
);
while ((datalen
) && (seg
< AHA_NSEG
)) {
/* put in the base address */
lto3b(thisphys
, sg
->seg_addr
);
SC_DEBUGN(xs
->sc_link
, SDEV_DB4
,
/* do it at least once */
while ((datalen
) && (thisphys
== nextphys
)) {
* This page is contiguous (physically)
* with the the last, just extend the
/* check it fits on the ISA bus */
printf("aha%d: DMA beyond"
xs
->error
= XS_DRIVER_STUFFUP
;
aha_free_ccb(unit
, ccb
, flags
);
/** how far to the end of the page ***/
nextphys
= (thisphys
& (~(PAGESIZ
- 1)))
bytes_this_page
= nextphys
- thisphys
;
bytes_this_page
= min(bytes_this_page
bytes_this_seg
+= bytes_this_page
;
datalen
-= bytes_this_page
;
/**** get more ready for the next page ****/
thiskv
= (thiskv
& (~(PAGESIZ
- 1)))
thisphys
= KVTOPHYS(thiskv
);
* next page isn't contiguous, finish the seg
SC_DEBUGN(xs
->sc_link
, SDEV_DB4
,
("(0x%x)", bytes_this_seg
));
lto3b(bytes_this_seg
, sg
->seg_len
);
lto3b(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",
xs
->error
= XS_DRIVER_STUFFUP
;
aha_free_ccb(unit
, ccb
, flags
);
} 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 (!(flags
& SCSI_NOMASK
)) {
s
= splbio(); /* stop instant timeouts */
timeout(aha_timeout
, (caddr_t
)ccb
, (xs
->timeout
* hz
) / 1000);
* Usually return SUCCESSFULLY QUEUED
SC_DEBUG(xs
->sc_link
, SDEV_DB3
, ("sent\n"));
return (SUCCESSFULLY_QUEUED
);
SC_DEBUG(xs
->sc_link
, SDEV_DB3
, ("cmd sent, waiting\n"));
* If we can't use interrupts, poll on completion
return (aha_poll(unit
, xs
, ccb
)); /* only during boot */
* Poll a particular unit, looking for a particular xs
struct aha_data
*aha
= ahadata
[unit
];
/*timeouts are in msec, so we loop in 1000uSec cycles */
* If we had interrupts enabled, would we
stat
= inb(AHA_INTR_PORT
);
if (stat
& AHA_ANY_INTR
) {
if (xs
->flags
& ITSDONE
) {
DELAY(1000); /* only happens in boot so ok */
* 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
, 0);
* because we are polling,
* take out the timeout entry aha_timeout made
untimeout(aha_timeout
, (caddr_t
)ccb
);
* Once again, wait for the int bit
stat
= inb(AHA_INTR_PORT
);
if (stat
& AHA_ANY_INTR
) {
if (xs
->flags
& ITSDONE
) {
DELAY(1000); /* only happens in boot so ok */
* We timed out again.. this is bad
* Notice that this time there is no
* clock queue entry to remove
aha_timeout((caddr_t
)ccb
, 0);
* 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
struct aha_data
*aha
= ahadata
[unit
];
retval
= aha_bus_speed_check(unit
,speed
);
if((retval
== 0) || (speed
== 0)) {
printf("No working bus speed for aha154X\n");
printf("%d nSEC ok, using "
,aha_bus_speeds
[lastworking
].nsecs
);
if(lastworking
== 7) { /* is slowest already */
retval2
= aha_bus_speed_check(unit
,lastworking
);
printf("test retry failed.. aborting.\n");
printf("%d nSEC\n",retval2
);
* 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!@";
aha_bus_speed_check(unit
, speed
)
int numspeeds
= sizeof(aha_bus_speeds
) / sizeof(struct bus_speed
);
struct aha_data
*aha
= ahadata
[unit
];
* Check we have such an entry
return (HAD_ERROR
); /* illegal speed */
aha_cmd(unit
, 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
lto3b(KVTOPHYS(aha_scratch_buf
), ad
);
for(loopcount
= 2000;loopcount
;loopcount
--)
strcpy(aha_scratch_buf
, aha_test_string
);
aha_cmd(unit
, 3, 0, 0, 0, AHA_WRITE_FIFO
, ad
[0], ad
[1], ad
[2]);
* clear the buffer then copy the contents back from the
bzero(aha_scratch_buf
, 54); /* 54 bytes transfered by test */
aha_cmd(unit
, 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
);
aha_timeout(caddr_t arg1
, int arg2
)
struct aha_ccb
* ccb
= (struct aha_ccb
*)arg1
;
unit
= ccb
->xfer
->sc_link
->adapter_unit
;
sc_print_addr(ccb
->xfer
->sc_link
);
* 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");
* If it has been through before, then
* a previous abort has failed, don't
if (ccb
->flags
== CCB_ABORTED
) {
ccb
->xfer
->retries
= 0; /* I MEAN IT ! */
ccb
->host_stat
= AHA_ABORTED
;
/* abort the operation that has timed out */
/* 4 secs for the abort */
timeout(aha_timeout
, (caddr_t
)ccb
, 4 * hz
);
ccb
->flags
= CCB_ABORTED
;