Date: Fri, 14 Apr 1995 12:47:36 +1000 From: Stephen Hocking <sysseh@devetir.qld.gov.au> To: current@FreeBSD.org Subject: Fixed seagate.c (incl. recent devconf changes) Message-ID: <199504140247.CAA27931@netfl15a.devetir.qld.gov.au>
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Recently I reported a bug (i386/337) about the -current seagate controller
code not working with my hardware. I also enclosed a fix, but I'm not sure if
after the recent set of SCSI changes that it has made it in or is event being considered yet. Anyway, incorporating the recent changes, here's the working
version. It's slow, but it works, unlike the later version.
/*
* (Free/Net/386)BSD ST01/02, Future Domain TMC-885, TMC-950 SCSI driver for
* Julians SCSI-code
*
* Copyright 1994, Kent Palmkvist (kentp@isy.liu.se)
* Copyright 1994, Robert Knier (rknier@qgraph.com)
* Copyright 1992, 1994 Drew Eckhardt (drew@colorado.edu)
* Copyright 1994, Julian Elischer (julian@tfs.com)
*
* Others that has contributed by example code is
* Glen Overby (overby@cray.com)
* Tatu Yllnen
* Brian E Litzinger
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPERS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
*
* kentp 940307 alpha version based on newscsi-03 version of Julians SCSI-code
* kentp 940314 Added possibility to not use messages
* rknier 940331 Added fast transfer code
* rknier 940407 Added assembler coded data transfers
*
* seagate.c,v 1.3 1994/10/27 08:03:15 sos Exp
*/
/*
* What should really be done:
*
* Add missing tests for timeouts
* Restructure interrupt enable/disable code (runs to long with int disabled)
* Find bug? giving problem with tape status
* Add code to handle Future Domain 840, 841, 880 and 881
* adjust timeouts (startup is very slow)
* add code to use tagged commands in SCSI2
* Add code to handle slow devices better (sleep if device not disconnecting)
* Fix unnecessary interrupts
*/
/* Note to users trying to share a disk between DOS and unix:
* The ST01/02 is a translating host-adapter. It is not giving DOS
* the same number of heads/tracks/sectors as specified by the disk.
* It is therefore important to look at what numbers DOS thinks the
* disk has. Use these to disklabel your disk in an appropriate manner
*/
#include <sys/types.h>
#ifdef KERNEL /* don't laugh.. look for main() */
#include "sea.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 <sys/user.h>
#include <sys/kernel.h>
#include <sys/devconf.h>
#include <i386/isa/isa_device.h>
#endif /* KERNEL */
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#ifndef KERNEL
#define NSEA 1
#endif /* !KERNEL */
#define SEA_SCB_MAX 8 /* allow maximally 8 scsi control blocks */
#define SCB_TABLE_SIZE 8 /* start with 8 scb entries in table */
#define BLOCK_SIZE 512 /* size of READ/WRITE areas on SCSI card */
/*
* defining PARITY causes parity data to be checked
*/
#define PARITY 1
/*
* defining SEA_BLINDTRANSFER will make DATA IN and DATA OUT to be done with
* blind transfers, i.e. no check is done for scsi phase changes. This will
* result in data loss if the scsi device does not send its data using
* BLOCK_SIZE bytes at a time.
* If SEA_BLINDTRANSFER defined and SEA_ASSEMBLER also defined will result in
* the use of blind transfers coded in assembler. SEA_ASSEMBLER is no good
* without SEA_BLINDTRANSFER defined.
*/
#undef SEA_BLINDTRANSFER /* do blind transfers */
#undef SEA_ASSEMBLER /* Use assembly code for fast transfers */
/*
* defining SEANOMSGS causes messages not to be used (thereby disabling
* disconnects)
*/
/* #define SEANOMSGS 1 */
/*
* defining SEA_NODATAOUT makes dataout phase being aborted
*/
/* #define SEA_NODATAOUT 1 */
/*
* defining SEA_SENSEFIRST make REQUEST_SENSE opcode to be placed first
*/
/* #define SEA_SENSEFIRST 1 */
/* Debugging definitions. Should not be used unless you want a lot of
printouts even under normal conditions */
/* #define SEADEBUG 1 */ /* General info about errors */
/* #define SEADEBUG1 1 */ /* Info about internal results and errors */
/* #define SEADEBUG2 1 */ /* Display a lot about timeouts etc */
/* #define SEADEBUG3 1 */
/* #define SEADEBUG4 1 */
/* #define SEADEBUG5 1 */
/* #define SEADEBUG6 1 */ /* Display info about queue-lengths */
/* #define SEADEBUG7 1 */ /* Extra check on STATUS before phase check */
/* #define SEADEBUG8 1 */ /* Disregard non-BSY state in
sea_information_transfer */
/* #define SEADEBUG9 1 */ /* Enable printouts */
/* #define SEADEBUG11 1 */ /* stop everything except access to scsi id 1 */
/* #define SEADEBUG15 1 */ /* Display every byte sent/received */
#define NUM_CONCURRENT 1 /* number of concurrent ops per board */
/******************************* board definitions **************************/
/*
* CONTROL defines
*/
#define CMD_RST 0x01 /* scsi reset */
#define CMD_SEL 0x02 /* scsi select */
#define CMD_BSY 0x04 /* scsi busy */
#define CMD_ATTN 0x08 /* scsi attention */
#define CMD_START_ARB 0x10 /* start arbitration bit */
#define CMD_EN_PARITY 0x20 /* enable scsi parity generation */
#define CMD_INTR 0x40 /* enable scsi interrupts */
#define CMD_DRVR_ENABLE 0x80 /* scsi enable */
/*
* STATUS
*/
#define STAT_BSY 0x01 /* scsi busy */
#define STAT_MSG 0x02 /* scsi msg */
#define STAT_IO 0x04 /* scsi I/O */
#define STAT_CD 0x08 /* scsi C/D */
#define STAT_REQ 0x10 /* scsi req */
#define STAT_SEL 0x20 /* scsi select */
#define STAT_PARITY 0x40 /* parity error bit */
#define STAT_ARB_CMPL 0x80 /* arbitration complete bit */
/*
* REQUESTS
*/
#define REQ_MASK (STAT_CD | STAT_IO | STAT_MSG)
#define REQ_DATAOUT 0
#define REQ_DATAIN STAT_IO
#define REQ_CMDOUT STAT_CD
#define REQ_STATIN (STAT_CD | STAT_IO)
#define REQ_MSGOUT (STAT_MSG | STAT_CD)
#define REQ_MSGIN (STAT_MSG | STAT_CD | STAT_IO)
#define REQ_UNKNOWN 0xff
#define SEAGATERAMOFFSET 0x00001800
#ifdef PARITY
#define BASE_CMD (CMD_EN_PARITY | CMD_INTR)
#else
#define BASE_CMD (CMD_INTR)
#endif
#define SEAGATE 1
#define FD 2
/******************************************************************************
* This should be placed in a more generic file (presume in /sys/scsi)
* Message codes:
*/
#define MSG_ABORT 0x06
#define MSG_NOP 0x08
#define MSG_COMMAND_COMPLETE 0x00
#define MSG_DISCONNECT 0x04
#define MSG_IDENTIFY 0x80
#define MSG_BUS_DEV_RESET 0x0c
#define MSG_MESSAGE_REJECT 0x07
#define MSG_SAVE_POINTERS 0x02
#define MSG_RESTORE_POINTERS 0x03
/******************************************************************************/
#define IDENTIFY(can_disconnect,lun) (MSG_IDENTIFY | ((can_disconnect) ? \
0x40 : 0) | ((lun) & 0x07))
/* scsi control block used to keep info about a scsi command */
struct sea_scb
{
int flags; /* status of the instruction */
#define SCB_FREE 0
#define SCB_ACTIVE 1
#define SCB_ABORTED 2
#define SCB_TIMEOUT 4
#define SCB_ERROR 8
#define SCB_TIMECHK 16 /* We have set a timeout on this one */
struct sea_scb *next; /* in free list */
struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */
u_char * data; /* position in data buffer so far */
int32 datalen; /* bytes remaining to transfer */;
};
/*
* data structure describing current status of the scsi bus. One for each
* controller card.
*/
struct sea_data
{
volatile caddr_t basemaddr; /* Base address for card */
char ctrl_type; /* FD or SEAGATE */
volatile caddr_t st0x_cr_sr; /* Address of control and status register */
volatile caddr_t st0x_dr; /* Address of data register */
u_short vect; /* interrupt vector for this card */
int our_id; /* our scsi id */
int numscb; /* number of scsi control blocks */
struct scsi_link sc_link; /* struct connecting different data */
struct sea_scb *connected; /* currently connected command */
struct sea_scb *issue_queue; /* waiting to be issued */
struct sea_scb *disconnected_queue; /* waiting to reconnect */
struct sea_scb scbs[SCB_TABLE_SIZE];
struct sea_scb *free_scb; /* free scb list */
volatile unsigned char busy[8]; /* index=target, bit=lun, Keep track of
busy luns at device target */
} *seadata[NSEA];
/* flag showing if main routine is running. */
static volatile int main_running = 0;
#define STATUS (*(volatile unsigned char *) sea->st0x_cr_sr)
#define CONTROL STATUS
#define DATA (*(volatile unsigned char *) sea->st0x_dr)
/*
* These are "special" values for the tag parameter passed to sea_select
* Not implemented right now.
*/
#define TAG_NEXT -1 /* Use next free tag */
#define TAG_NONE -2 /*
* Establish I_T_L nexus instead of I_T_L_Q
* even on SCSI-II devices.
*/
typedef struct {
char *signature ;
unsigned offset;
unsigned length;
unsigned char type;
} BiosSignature;
/*
* Signatures for automatic recognition of board type
*/
static const BiosSignature signatures[] = {
{"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE},
{"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE},
/*
* The following two lines are NOT mistakes. One detects ROM revision
* 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter,
* and this is not going to change, the "SEAGATE" and "SCSI" together
* are probably "good enough"
*/
{"SEAGATE SCSI BIOS ", 16, 17, SEAGATE},
{"SEAGATE SCSI BIOS ", 17, 17, SEAGATE},
/*
* However, future domain makes several incompatible SCSI boards, so specific
* signatures must be used.
*/
{"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 45, FD},
{"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FD},
{"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90",5, 47, FD},
{"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90",5, 47, FD},
{"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FD},
{"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FD},
{"FUTURE DOMAIN TMC-950", 5, 21, FD},
};
#define NUM_SIGNATURES (sizeof(signatures) / sizeof(BiosSignature))
static const char * seagate_bases[] = {
(char *) 0xc8000, (char *) 0xca000, (char *) 0xcc000,
(char *) 0xce000, (char *) 0xdc000, (char *) 0xde000
};
#define NUM_BASES (sizeof(seagate_bases)/sizeof(char *))
int sea_probe(struct isa_device *dev);
int sea_attach(struct isa_device *dev);
int seaintr(int unit);
int32 sea_scsi_cmd(struct scsi_xfer *xs);
void sea_timeout(caddr_t, int);
void seaminphys(struct buf *bp);
void sea_done(int unit, struct sea_scb *scb);
u_int32 sea_adapter_info(int unit);
struct sea_scb *sea_get_scb(int unit, int flags);
void sea_free_scb(int unit, struct sea_scb *scb, int flags);
static void sea_main(void);
static void sea_information_transfer(struct sea_data *sea);
int sea_poll(int unit, struct scsi_xfer *xs, struct sea_scb *scb);
int sea_init(int unit);
int sea_send_scb(struct sea_data *sea, struct sea_scb *scb);
int sea_reselect(struct sea_data *sea);
int sea_select(struct sea_data *sea, struct sea_scb *scb);
int sea_transfer_pio(struct sea_data *sea, u_char *phase, int32 *count,
u_char **data);
int sea_abort(int unit, struct sea_scb *scb);
static sea_unit = 0;
static sea_slot = -1; /* last found board seagate_bases address index */
#define FAIL 1
#define SUCCESS 0
#ifdef KERNEL
struct scsi_adapter sea_switch =
{
sea_scsi_cmd,
seaminphys,
0,
0,
sea_adapter_info,
"sea",
0,0
};
/* the below structure is so we have a default dev struct for our link struct */
struct scsi_device sea_dev =
{
NULL, /* use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
"sea",
0,
0,0
};
struct isa_driver seadriver =
{
sea_probe,
sea_attach,
"sea"
};
#endif /* KERNEL */
#ifdef SEADEBUG6
void sea_queue_length()
{
struct sea_scb *tmp;
int length = 0;
if(seadata[0]->connected)
length = 1;
for(tmp = seadata[0]->issue_queue; tmp != NULL; tmp = tmp->next, length++);
for(tmp = seadata[0]->disconnected_queue ; tmp != NULL; tmp->next, length++);
printf("length:%d ",length);
}
#endif
static char sea_description [80]; /* XXX BOGUS!!! */
static struct kern_devconf sea_kdc[NSEA] = {{
0, 0, 0, "sea", 0, { MDDT_ISA, 0, "bio" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN, &kdc_isa0, 0,
DC_UNCONFIGURED, sea_description,
DC_CLS_MISC /* host adapters aren't special */
} };
/***********************************************************************\
* Check if the device can be found at the port given and if so, detect *
* the type of board. Set it up ready for further work. Takes the *
* isa_dev structure from autoconf as an argument. *
* Returns 1 if card recognized, 0 if errors *
\***********************************************************************/
int
sea_probe(dev)
struct isa_device *dev;
{
int j;
int unit = sea_unit;
struct sea_data *sea;
dev->id_unit = unit;
#ifdef SEADEBUG2
printf("sea_probe ");
#endif
/* find unit and check we have that many defined */
if(unit >= NSEA) {
printf("sea%d: unit number too high\n",unit);
return(0);
}
dev->id_unit = unit;
#ifdef SEADEBUG2
printf("unit: %d\n",unit);
printf("dev_addr: 0x%lx\n",dev->id_maddr);
#endif
/* allocate a storage area for us */
if (seadata[unit]) {
printf("sea%d: memory already allocated\n", unit);
return(0);
}
#ifdef SEADEBUG2
printf("Before malloc\n");
#endif
sea = malloc(sizeof(struct sea_data), M_TEMP, M_NOWAIT);
if (!sea) {
printf("sea%d: cannot malloc!\n", unit);
return(0);
}
#ifdef SEADEBUG2
printf("after malloc\n");
for(j=0;j<32767;j++);
#endif
bzero(sea,sizeof(struct sea_data));
seadata[unit] = sea;
/* check for address if no one specified */
sea->basemaddr = NULL;
/* Could try to find a board by looking through all possible addresses */
/* This is not done the right way now, because I have not found a way */
/* to get a boards virtual memory address given its physical. There is */
/* a function that returns the physical address for a given virtual */
/* address, but not the other way around */
if(dev->id_maddr == 0) {
/*
for(sea_slot++;sea_slot<NUM_BASES;sea_slot++)
for(j = 0; !sea->basemaddr && j < NUM_SIGNATURES; ++j)
if(!memcmp((void *)(seagate_bases[sea_slot]+signatures[j].offset),
(void *) signatures[j].signature, signatures[j].length)) {
sea->basemaddr = (void *)seagate_bases[sea_slot];
break;
}
*/
} else {
#ifdef SEADEBUG2
printf("id_maddr != 0\n");
for(j = 0; j < 32767 ; j++);
for(j = 0; j < 32767 ; j++);
#endif
/* find sea_slot position for overridden memory address */
for(j = 0; ((char *)vtophys(dev->id_maddr) != seagate_bases[j]) &&
j<NUM_BASES; ++j);
if(j == NUM_BASES) {
printf("sea%d: board not expected at address 0x%lx\n",
unit, dev->id_maddr);
seadata[unit]=NULL;
free(sea, M_TEMP);
return(0);
} else if(sea_slot > j) {
printf("sea%d: board address 0x%lx already probed!\n",
unit, dev->id_maddr);
seadata[unit]=NULL;
free(sea, M_TEMP);
return(0);
} else {
sea->basemaddr = dev->id_maddr;
}
}
#ifdef SEADEBUG2
printf("sea->basemaddr = %lx\n", sea->basemaddr);
#endif
/* check board type */ /* No way to define this through config */
for(j = 0; j < NUM_SIGNATURES; j++)
if(!memcmp((void *) (sea->basemaddr + signatures[j].offset),
(void *) signatures[j].signature, signatures[j].length)) {
sea->ctrl_type = signatures[j].type;
break;
}
if(j == NUM_SIGNATURES) {
#ifdef SEADEBUG
printf("sea: Board type unknown at address 0x%lx\n",
sea->basemaddr);
#endif
seadata[unit]=NULL;
free(sea, M_TEMP);
return(0);
}
/* Find controller and data memory addresses */
sea->st0x_cr_sr = (void *) (((unsigned char *) sea->basemaddr) +
((sea->ctrl_type == SEAGATE) ? 0x1a00 : 0x1c00));
sea->st0x_dr = (void *) (((unsigned char *) sea->basemaddr) +
((sea->ctrl_type == SEAGATE) ? 0x1c00 : 0x1e00));
strcpy(sea_description, (sea->ctrl_type == SEAGATE) ? "Seagate ST01/ST02":
"Future Domain TMC-885/TMC-950");
/* Test controller RAM (works the same way on future domain cards?) */
*(sea->basemaddr + SEAGATERAMOFFSET) = 0xa5;
*(sea->basemaddr + SEAGATERAMOFFSET + 1) = 0x5a;
if((*(sea->basemaddr + SEAGATERAMOFFSET) != (char) 0xa5) ||
(*(sea->basemaddr + SEAGATERAMOFFSET + 1) != (char) 0x5a)) {
printf("sea%d: Board RAM failure\n",unit);
}
if(sea_init(unit) != 0) {
seadata[unit] = NULL;
free(sea,M_TEMP);
return(0);
}
/* if its there put in it's interrupt vector */
/* (Doesn't use dma, so no drq is set) */
sea->vect = dev->id_irq;
sea_unit++;
return(1);
}
static inline void
sea_registerdev(struct isa_device *id)
{
if(id->id_unit)
sea_kdc[id->id_unit] = sea_kdc[0];
sea_kdc[id->id_unit].kdc_unit = id->id_unit;
sea_kdc[id->id_unit].kdc_isa = id;
dev_attach(&sea_kdc[id->id_unit]);
}
/***********************************************\
* Attach all sub-devices we can find *
\***********************************************/
int
sea_attach(dev)
struct isa_device *dev;
{
int unit = dev->id_unit;
struct sea_data *sea = seadata[unit];
#ifdef SEADEBUG2
printf("sea_attach called\n");
#endif
sea_kdc[unit].kdc_state = DC_BUSY; /* host adapters are always busy */
/* fill in the prototype scsi_link */
sea->sc_link.adapter_unit = unit;
sea->sc_link.adapter_targ = sea->our_id;
sea->sc_link.adapter = &sea_switch;
sea->sc_link.device = &sea_dev;
printf("\n");
/*****************************************************\
* ask the adapter what subunits are present *
\*****************************************************/
scsi_attachdevs(&(sea->sc_link));
sea_registerdev(dev);
return 1;
}
/***********************************************\
* Return some information to the caller about *
* the adapter and its capabilities *
\***********************************************/
u_int32
sea_adapter_info(unit)
int unit;
{
#ifdef SEADEBUG2
printf("sea_adapter_info called\n");
#endif
return 1;
}
/***********************************************\
* Catch an interrupt from the adaptor *
\***********************************************/
int
seaintr(unit)
int unit;
{
int done;
struct sea_data *sea = seadata[unit];
int oldpri;
#if SEADEBUG2
printf(";");
#endif
do {
done = 1;
/* dispatch to appropriate routine if found and done=0 */
/* should check to see that this card really caused the interrupt */
if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) {
/* Reselect interrupt */
#ifdef SEADEBUG2
printf(";2");
#endif
done = 0;
/* enable_intr(); */ /* ?? How should this be done ?? */
sea_reselect(sea);
} else if (STATUS & STAT_PARITY) {
/* Parity error interrupt */
#ifdef SEADEBUG2
printf(";3");
#endif
printf("sea%d: PARITY interrupt\n", unit);
} else {
#ifdef SEADEBUG2
/* printf("sea%d: unknown interrupt\n",unit); */
printf(";4%x", STATUS);
#endif
}
if (!done) {
oldpri = splbio(); /* disable_intr(); */
if (!main_running) {
#ifdef SEADEBUG2
printf(";5");
#endif
main_running = 1;
sea_main();
/* main_running is cleared in sea_main once it can't
* do more work, and sea_main exits with interrupts
* disabled
*/
splx(oldpri); /* enable_intr(); */
} else {
splx(oldpri); /* enable_intr(); */
}
}
} while (!done);
return 1;
}
/***********************************************\
* Setup data structures, and reset the board *
* and the scsi bus *
\***********************************************/
int
sea_init(unit)
int unit;
{
long l;
int i;
struct sea_data *sea = seadata[unit];
#ifdef SEADEBUG2
printf("sea_init called\n");
#endif
/* Reset the scsi bus (I don't know if this is needed */
CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_RST;
DELAY(25); /* hold reset for at least 25 microseconds */
CONTROL = BASE_CMD;
DELAY(10); /* wait a Bus Clear Delay (800 ns + bus free delay (800 ns) */
/* Set our id (don't know anything about this) */
if(sea->ctrl_type == SEAGATE)
sea->our_id = 7;
else
sea->our_id = 6;
/* init fields used by our routines */
sea->connected = NULL;
sea->issue_queue = NULL;
sea->disconnected_queue = NULL;
for (i=0; i<8 ; i++)
sea->busy[i] = 0;
/* link up the free list of scbs */
sea->numscb = SCB_TABLE_SIZE;
sea->free_scb = (struct sea_scb *) & (sea->scbs[0]);
for(i=1;i< SCB_TABLE_SIZE ; i++) {
sea->scbs[i-1].next = &(sea->scbs[i]);
}
sea->scbs[SCB_TABLE_SIZE - 1].next = NULL;
return(0);
}
/***********************************************\
* *
\***********************************************/
void seaminphys(bp)
struct buf *bp;
{
#ifdef SEADEBUG2
/* printf("seaminphys called\n"); */
printf(",");
#endif
}
/***********************************************\
* start a scsi operation given the command and *
* the data address. Also needs the unit, target *
* and lu *
* get a free scb and set it up *
* call send_scb *
* either start timer or wait until done *
\***********************************************/
int32 sea_scsi_cmd(xs)
struct scsi_xfer *xs;
{
struct scsi_sense_data *s1, *s2;
struct sea_scb *scb;
int i = 0;
int flags;
int unit = xs->sc_link->adapter_unit;
struct sea_data *sea = seadata[unit];
int s;
unsigned int stat;
int32 result;
#ifdef SEADEBUG2
/* printf("scsi_cmd\n"); */
printf("=");
#endif
#ifdef SEADEBUG11
if(xs->sc_link->target != 1) {
xs->flags |= ITSDONE;
xs->error = XS_TIMEOUT;
return(HAD_ERROR);
}
#endif
flags = xs->flags;
if(xs->bp) flags |= (SCSI_NOSLEEP);
if(flags & ITSDONE) {
printf("sea%d: Already done?", unit);
xs->flags &= ~ITSDONE;
}
if(!(flags & INUSE)) {
printf("sea%d: Not in use?", unit);
xs->flags |= INUSE;
}
if (!(scb = sea_get_scb(unit, flags))) {
#ifdef SEADEBUG2
printf("=2");
#endif
xs->error = XS_DRIVER_STUFFUP;
return(TRY_AGAIN_LATER);
}
/*
* Put all the arguments for the xfer in the scb
*/
scb->xfer = xs;
scb->datalen = xs->datalen;
scb->data = xs->data;
if(flags & SCSI_RESET) {
/* Try to send a reset command to the card. This is done by calling the
* Reset function. Should then return COMPLETE. Need to take care of the
* possible current connected command.
* Not implemented right now.
*/
printf("sea%d: Got a SCSI_RESET!\n",unit);
}
/* setup the scb to contain necessary values */
/* The interresting values can be read from the xs that is saved */
/* I therefore think that the structure can be kept very small */
/* the driver doesn't use DMA so the scatter/gather is not needed ? */
#ifdef SEADEBUG6
sea_queue_length();
#endif
if (sea_send_scb(sea, scb) == 0) {
#ifdef SEADEBUG2
printf("=3");
#endif
xs->error = XS_DRIVER_STUFFUP;
sea_free_scb(unit, scb, flags);
return (TRY_AGAIN_LATER);
}
/*
* Usually return SUCCESSFULLY QUEUED
*/
if (!(flags & SCSI_NOMASK)) {
if(xs->flags & ITSDONE) { /* timout timer not started, already finished */
/* Tried to return COMPLETE but the machine hanged with this */
#ifdef SEADEBUG2
printf("=6");
#endif
return(SUCCESSFULLY_QUEUED);
}
timeout((timeout_func_t)sea_timeout, (caddr_t)scb, (xs->timeout * hz)/1000);
scb->flags |= SCB_TIMECHK;
#ifdef SEADEBUG2
printf("=4");
#endif
return(SUCCESSFULLY_QUEUED);
}
/*
* If we can't use interrupts, poll on completion
*/
result = sea_poll(unit, xs, scb);
#ifdef SEADEBUG2
printf("=5 %lx", result);
#endif
return result;
}
/*
* Get a free scb. If there are none, see if we can allocate a new one. If so,
* put it in the hash table too, otherwise return an error or sleep.
*/
struct sea_scb *
sea_get_scb(unit, flags)
int unit;
int flags;
{
struct sea_data *sea = seadata[unit];
unsigned opri = 0;
struct sea_scb * scbp;
int hashnum;
#ifdef SEADEBUG2
/* printf("get_scb\n"); */
printf("(");
#endif
if (!(flags & SCSI_NOMASK))
opri = splbio();
#ifdef SEADEBUG3
printf("(2 %lx ", sea->free_scb);
#endif
/*
* If we can and have to, sleep waiting for one to come free
* but only if we can4t allocate a new one.
*/
while (!(scbp = sea->free_scb)) {
#ifdef SEADEBUG12
printf("(3");
#endif
if (sea->numscb < SEA_SCB_MAX) {
printf("malloced new scbs\n");
if (scbp = (struct sea_scb *) malloc(sizeof(struct sea_scb),
M_TEMP, M_NOWAIT)) {
bzero(scbp, sizeof(struct sea_scb));
sea->numscb++;
scbp->flags = SCB_ACTIVE;
scbp->next = NULL;
} else {
printf("sea%d: Can't malloc SCB\n",unit);
}
goto gottit;
} else {
#ifdef SEADEBUG12
printf("(4");
#endif
if(!(flags & SCSI_NOSLEEP)) {
#ifdef SEADEBUG2
printf("(5");
#endif
tsleep(&sea->free_scb, PRIBIO, "seascb", 0);
}
}
}
if (scbp) {
#ifdef SEADEBUG2
printf("(6");
#endif
/* Get SCB from free list */
sea->free_scb = scbp->next;
scbp->next = NULL;
scbp->flags = SCB_ACTIVE;
}
gottit:
if (!(flags & SCSI_NOMASK))
splx(opri);
return(scbp);
}
/*
* sea_send_scb
*
* Try to send this command to the board. Because this board does not use any
* mailboxes, this routine simply adds the command to the queue held by the
* sea_data structure.
* A check is done to see if the command contains a REQUEST_SENSE command, and
* if so the command is put first in the queue, otherwise the command is added
* to the end of the queue. ?? Not correct ??
*/
int
sea_send_scb(struct sea_data *sea, struct sea_scb *scb)
{
struct sea_scb *tmp;
int oldpri = 0;
#ifdef SEADEBUG2
printf("+");
#endif
if(!(scb->xfer->flags & SCSI_NOSLEEP)) {
oldpri = splbio();
}
/* add to head of queue if queue empty or command is REQUEST_SENSE */
if (!(sea->issue_queue)
#ifdef SEA_SENSEFIRST
|| (scb->xfer->cmd->opcode == (u_char) REQUEST_SENSE)
#endif
) {
#ifdef SEADEBUG2
printf("+2");
#endif
scb->next = sea->issue_queue;
sea->issue_queue = scb;
} else {
#ifdef SEADEBUG2
printf("+3");
#endif
for (tmp = sea->issue_queue; tmp->next; tmp = tmp->next);
tmp->next = scb;
scb->next = NULL; /* placed at the end of the queue */
}
/* Try to do some work on the card */
if (!main_running) {
main_running = 1;
sea_main();
/* main running is cleared in sea_main once it can't
* do more work, and sea_main exits with interrupts
* disabled
*/
}
if(!(scb->xfer->flags & SCSI_NOSLEEP)) {
splx(oldpri);
}
return (1); /* No possible errors right now */
}
/*
* sea_main(void)
*
* corroutine that runs as long as more work can be done on the seagate host
* adapter in a system. Both sea_scsi_cmd and sea_intr will try to start it in
* case it is not running.
*/
static void sea_main(void)
{
struct sea_data *sea; /* This time we look at all cards */
struct sea_scb *tmp, *prev;
int done;
int unit;
int oldpri;
#ifdef SEADEBUG2
printf(".");
#endif
/*
* This should not be run with interrupts disabled, but use the splx code
* instead
*/
do {
done = 1;
for (sea=seadata[unit=0]; (unit < NSEA) && seadata[unit] ;
sea=seadata[++unit]) {
oldpri = splbio();
if (!sea->connected) {
#ifdef SEADEBUG2
printf(".2");
#endif
/*
* Search through the issue_queue for a command destined for a
* target that's not busy.
*/
for (tmp = sea->issue_queue, prev = NULL; tmp ;
prev = tmp, tmp = tmp->next)
/* When we find one, remove it from the issue queue. */
if (!(sea->busy[tmp->xfer->sc_link->target] &
(1 << tmp->xfer->sc_link->lun))) {
if (prev)
prev->next = tmp->next;
else
sea->issue_queue = tmp->next;
tmp->next = NULL;
/* re-enable interrupts after finding one */
splx(oldpri);
/*
* Attempt to establish an I_T_L nexus here.
* On success, sea->connected is set.
* On failure, we must add the command back to
* the issue queue so we can keep trying.
*/
#ifdef SEADEBUG2
printf(".3");
#endif
/* REQUEST_SENSE commands are issued without tagged
* queueing, even on SCSI-II devices because the
* contingent alligence condition exists for the
* entire unit.
*/
/* First check that if any device has tried a reconnect while
* we have done other things with interrupts disabled
*/
if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) {
#ifdef SEADEBUG2
printf(".7");
#endif
sea_reselect(sea);
break;
}
if (!sea_select(sea, tmp)) {
#ifdef SEADEBUG2
/* printf("Select returned ok\n"); */
printf(".4");
#endif
break;
} else {
oldpri = splbio();
tmp->next = sea->issue_queue;
sea->issue_queue = tmp;
splx(oldpri);
printf("sea_main: select failed\n");
}
} /* if target/lun is not busy */
} /* if (!sea->connected) */
if (sea->connected) { /* we are connected. Do the task */
splx(oldpri);
#ifdef SEADEBUG2
/* printf("sea_main: starting information transfer!\n"); */
printf(".5");
#endif
sea_information_transfer(sea);
#ifdef SEADEBUG2
/* printf("sea_main: sea->connected:%lx\n", sea->connected); */
printf(".6%lx ", sea->connected);
#endif
done = 0;
} else
break;
} /* for instance */
} while (!done);
main_running = 0;
}
void
sea_free_scb(unit, scb, flags)
int unit;
struct sea_scb *scb;
int flags;
{
struct sea_data *sea = seadata[unit];
unsigned int opri = 0;
#ifdef SEADEBUG2
/* printf("free_scb\n"); */
printf(")");
#endif
if(!(flags & SCSI_NOMASK))
opri = splbio();
scb->next = sea->free_scb;
sea->free_scb = scb;
scb->flags = SCB_FREE;
/*
* If there were none, wake anybody waiting for one to come free,
* starting with queued entries.
*/
if(!scb->next) {
#ifdef SEADEBUG2
/* printf("free_scb waking up sleep\n"); */
printf(")2");
#endif
wakeup((caddr_t)&sea->free_scb);
}
if (!(flags & SCSI_NOMASK))
splx(opri);
}
void
sea_timeout(caddr_t arg1, int arg2)
{
struct sea_scb *scb = (struct sea_scb *)arg1;
int unit;
struct sea_data *sea;
int s=splbio();
#ifdef SEADEBUG2
/* printf("sea_timeout called\n"); */
printf(":");
#endif
unit = scb->xfer->sc_link->adapter_unit;
sea = seadata[unit];
#ifndef SEADEBUG /* print message only if not waiting unless debug */
if(!(scb->xfer->flags & SCSI_NOMASK))
#endif
printf("sea%d:%d:%d (%s%d) timed out ", unit,
scb->xfer->sc_link->target,
scb->xfer->sc_link->lun,
scb->xfer->sc_link->device->name,
scb->xfer->sc_link->dev_unit);
/*
* If it has been through before, then
* a previous abort has failed, don't
* try abort again
*/
if (/* (sea_abort(unit, scb) != 1) ||*/ (scb->flags & SCB_ABORTED)) {
/*
* abort timed out
*/
#ifdef SEADEBUG2
/* printf("sea%d: Abort Operation has timed out\n", unit); */
printf(":2");
#endif
scb->xfer->retries = 0;
scb->flags |= SCB_ABORTED;
sea_done(unit, scb);
} else {
#ifdef SEADEBUG2
/* printf("sea%d: Try to abort\n", unit); */
printf(":3");
#endif
sea_abort(unit, scb);
/* sea_send_scb(sea, ~SCSI_NOMASK, SEA_SCB_ABORT, scb); */
/* 2 seconds for the abort */
timeout((timeout_func_t)sea_timeout, (caddr_t)scb, 2*hz);
scb->flags |= (SCB_ABORTED | SCB_TIMECHK);
}
splx(s);
}
int
sea_reselect(sea)
struct sea_data *sea;
{
unsigned char target_mask;
long l;
unsigned char lun, phase;
unsigned char msg[3];
int32 len;
u_char *data;
struct sea_scb *tmp = 0, *prev = 0;
int abort = 0;
#if SEADEBUG2
/* printf("sea_reselect called\n"); */
printf("}");
#endif
if (!((target_mask = STATUS) & STAT_SEL)) {
printf("sea: wrong state 0x%x\n", target_mask);
return(0);
}
/* wait for a device to win the reselection phase */
/* signals this by asserting the I/O signal */
for(l=10; l && (STATUS & (STAT_SEL | STAT_IO | STAT_BSY))
!= (STAT_SEL | STAT_IO | 0);l--);
/* !! Check for timeout here */
/* the data bus contains original initiator id ORed with target id */
target_mask = DATA;
/* see that we really are the initiator */
if (!(target_mask & ((sea->ctrl_type == SEAGATE) ? 0x80 : 0x40))) {
printf("sea: polled reselection was not for me: %x\n",target_mask);
return(0);
}
/* find target who won */
target_mask &= ((sea->ctrl_type == SEAGATE) ? ~0x80 : ~0x40);
/* host responds by asserting the BSY signal */
CONTROL = (BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY);
/* target should respond by deasserting the SEL signal */
for(l=50000;l && (STATUS & STAT_SEL);l++);
/* remove the busy status */
CONTROL = (BASE_CMD | CMD_DRVR_ENABLE);
/* we are connected. Now we wait for the MSGIN condition */
for(l=50000; l && !(STATUS & STAT_REQ);l--);
/* !! Add timeout check here */
/* hope we get an IDENTIFY message */
len = 3;
data = msg;
phase = REQ_MSGIN;
sea_transfer_pio(sea, &phase, &len, &data);
if (!(msg[0] & 0x80)) {
printf("sea: Expecting IDENTIFY message, got 0x%x\n", msg[0]);
abort = 1;
} else {
lun = (msg[0] & 0x07);
/*
* Find the command corresponding to the I_T_L or I_T_L_Q nexus we
* just restablished, and remove it from the disconnected queue.
*/
for(tmp = sea->disconnected_queue, prev = NULL;
tmp; prev=tmp, tmp = tmp->next)
if((target_mask == (1 << tmp->xfer->sc_link->target)) &&
(lun == tmp->xfer->sc_link->lun)) {
if(prev) {
#ifdef SEADEBUG2
printf("}2");
#endif
prev->next = tmp->next;
} else {
#ifdef SEADEBUG2
printf("}3");
#endif
sea->disconnected_queue = tmp->next;
}
tmp->next = NULL;
break;
}
if (!tmp) {
printf("sea: warning : target %02x lun %d not in disconnect_queue\n",
target_mask, lun);
/*
* Since we have an established nexus that we can't do anything with,
* we must abort it.
*/
abort = 1;
}
}
if(abort) {
#ifdef SEADEBUG2
printf("}4");
#endif
msg[0] = MSG_ABORT;
len = 1;
data = msg;
phase = REQ_MSGOUT;
CONTROL = (BASE_CMD | CMD_ATTN);
sea_transfer_pio(sea, &phase, &len, &data);
} else {
#ifdef SEADEBUG2
printf("}5");
#endif
sea->connected = tmp;
}
/* return value not used yet */
return 0;
}
/* Transfer data in given phase using polled I/O
*/
int sea_transfer_pio(struct sea_data *sea, u_char *phase, int32 *count,
u_char **data)
{
register unsigned char p = *phase, tmp;
register int c = *count;
register unsigned char *d = *data;
unsigned long int timeout;
#if SEADEBUG2
/* printf("sea_transfer_pio called: len:%x\n",c); */
printf("-1 %x %x", c, p);
#endif
do {
/* wait for assertion of REQ, after which the phase bits will be valid */
for(timeout = 0; timeout < 5000000L ; timeout++)
if ((tmp = STATUS) & STAT_REQ)
break;
if (!(tmp & STAT_REQ)) {
printf("sea_transfer_pio: timeout waiting for STAT_REQ\n");
break;
}
/* check for phase mismatch */
/* Reached if the target decides that it has finished the transfer */
if ((tmp & REQ_MASK) != p) {
#ifdef SEADEBUG1
/* printf("-2 %x", tmp); */
printf("sea:pio phase mismatch:%x, want:%x, len:%x\n",tmp,p,c);
#endif
break;
}
/* Do actual transfer from SCSI bus to/from memory */
if (!(p & STAT_IO))
DATA = *d;
else
*d = DATA;
#ifdef SEADEBUG15
printf("-7%x", *d);
#endif
++d;
/* The SCSI standard suggests that in MSGOUT phase, the initiator
* should drop ATN on the last byte of the message phase
* after REQ has been asserted for the handshake but before
* the initiator raises ACK.
* Don't know how to accomplish this on the ST01/02
*/
/* We don't mind right now. */
/* The st01 code doesn't wait for STAT_REQ to be deasserted. Is this ok? */
/* for(timeout=0;timeout<200000L;timeout++)
if(!(STATUS & STAT_REQ))
break;
if(STATUS & STAT_REQ)
printf("timeout on wait for !STAT_REQ"); */
/* printf("*"); */
} while (--c);
*count = c;
*data = d;
tmp = STATUS;
if (tmp & STAT_REQ) {
#if SEADEBUG2
printf("-3%x", tmp);
#endif
*phase = tmp & REQ_MASK;
} else {
#if SEADEBUG2
printf("-4%x", tmp);
#endif
*phase = REQ_UNKNOWN;
}
if (!c || (*phase == p)) {
#if SEADEBUG2
printf("-5%x %x", c, *phase);
#endif
return 0;
} else {
#if SEADEBUG2
printf("-6");
#endif
return -1;
}
}
/* sea_select
* establish I_T_L or I_T_L_Q nexus for new or existing command
* including ARBITRATION, SELECTION, and initial message out for IDENTIFY and
* queue messages.
* return -1 if selection could not execute for some reason, 0 if selection
* succeded or failed because the taget did not respond
*/
int sea_select(struct sea_data *sea, struct sea_scb *scb)
{
unsigned char tmp[3], phase;
u_char *data;
int32 len;
unsigned long timeout;
#ifdef SEADEBUG2
/* printf("sea_select called\n"); */
printf("{");
#endif
CONTROL = BASE_CMD;
DATA = ((sea->ctrl_type == SEAGATE) ? 0x80 : 0x40);
CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_START_ARB;
/* wait for arbitration to complete */
for (timeout = 0; timeout < 3000000L ; timeout++) {
if (STATUS & STAT_ARB_CMPL)
break;
}
if (!(STATUS & STAT_ARB_CMPL)) {
if (STATUS & STAT_SEL) {
printf("sea: arbitration lost\n");
scb->flags |= SCB_ERROR;
} else {
printf("sea: arbitration timeout.\n");
scb->flags |=SCB_TIMEOUT;
}
CONTROL = BASE_CMD;
return(-1);
}
DELAY(2);
#if SEADEBUG2
/* printf("after arbitration: STATUS=%x\n", STATUS); */
printf("{2 %x", STATUS);
#endif
DATA = (unsigned char)((1 << scb->xfer->sc_link->target) |
((sea->ctrl_type == SEAGATE) ? 0x80 : 0x40));
#ifdef SEANOMSGS
CONTROL = (BASE_CMD & (~CMD_INTR))| CMD_DRVR_ENABLE | CMD_SEL;
#else
CONTROL = (BASE_CMD & (~CMD_INTR)) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN;
#endif
DELAY(1);
/* wait for a bsy from target */
for (timeout = 0; timeout < 2000000L; timeout++) {
if (STATUS & STAT_BSY)
break;
}
#if SEADEBUG2
/* printf("after wait for BSY: STATUS=%x,count=%lx\n", STATUS, timeout); */
printf("{3 %x %x", STATUS, timeout);
#endif
if (!(STATUS & STAT_BSY)) {
/* should return some error to the higher level driver */
CONTROL = BASE_CMD;
#if SEADEBUG2
/* printf("sea: target did not respond\n"); */
printf("{4");
#endif
scb->flags |= SCB_TIMEOUT;
return 0;
}
/* Try to make the target to take a message from us */
#ifdef SEANOMSGS
CONTROL = (BASE_CMD & (~CMD_INTR)) | CMD_DRVR_ENABLE;
#else
CONTROL = (BASE_CMD & (~CMD_INTR)) | CMD_DRVR_ENABLE | CMD_ATTN;
#endif
DELAY(1);
/* should start a msg_out phase */
for (timeout = 0; timeout < 2000000L ; timeout++) {
if (STATUS & STAT_REQ)
break;
}
CONTROL = BASE_CMD | CMD_DRVR_ENABLE;
#if SEADEBUG2 || SEADEBUG9
/* printf("after wait for STAT_REQ: STATUS=%x,count=%lx\n", STATUS, timeout);
printf("2:nd try after wait for STAT_REQ: STATUS=%x\n", STATUS); */
printf("{5%x", timeout);
#endif
if (!(STATUS & STAT_REQ)) {
/* This should not be taken as an error, but more like an unsupported
* feature!
* Should set a flag indicating that the target don't support messages, and
* continue without failure. (THIS IS NOT AN ERROR!)
*/
#if SEADEBUG
/* printf("{6"); */
printf("sea: WARNING: target %x don't support messages?\n",
scb->xfer->sc_link->target);
#endif
} else {
tmp[0] = IDENTIFY(1, scb->xfer->sc_link->lun); /* allow disconnects */
len = 1;
data = tmp;
phase = REQ_MSGOUT;
/* Should do test on result of sea_transfer_pio */
#if SEADEBUG2
/* printf("Trying a msg out phase\n"); */
printf("{7");
#endif
sea_transfer_pio(sea, &phase, &len, &data);
}
if (!(STATUS & STAT_BSY)) {
printf("sea: after successful arbitrate: No STAT_BSY!\n");
}
#if SEADEBUG2
printf("{8");
#endif
sea->connected = scb;
sea->busy[scb->xfer->sc_link->target] |= (1 << scb->xfer->sc_link->lun);
/* this assignment should depend on possibility to send a message to target */
CONTROL = BASE_CMD | CMD_DRVR_ENABLE;
/* reset pointer in command ??? */
return 0;
}
/* sea_abort
send an abort to the target
return 1 success, 0 on failure
*/
int sea_abort(int unit, struct sea_scb *scb)
{
struct sea_data *sea = seadata[unit];
struct sea_scb *tmp, **prev;
unsigned char msg, phase, *msgptr;
int32 len;
int oldpri;
#ifdef SEADEBUG2
/* printf("sea_abort called\n"); */
printf("\\");
#endif
oldpri = splbio();
/* If the command hasn't been issued yet, we simply remove it from the
* issue queue
*/
for (prev = (struct sea_scb **) &(sea->issue_queue),
tmp = sea->issue_queue; tmp;
prev = (struct sea_scb **) &(tmp->next), tmp = tmp->next)
if (scb == tmp) {
(*prev) = tmp->next;
tmp->next = NULL;
/* set some type of error result for this operation */
splx(oldpri);
#ifdef SEADEBUG2
printf("\\2");
#endif
return 1;
}
/* If any commands are connected, we're going to fail the abort
* and let the high level SCSI driver retry at a later time or issue a
* reset
*/
if(sea->connected) {
splx(oldpri);
#ifdef SEADEBUG2
/* printf("sea:abort error connected\n"); */
printf("\\3");
#endif
return 0;
}
/* If the command is currently disconnected from the bus, and there are
* no connected commands, we reconnect the I_T_L or I_T_L_Q nexus
* associated with it, go into message out, and send an abort message.
*/
for (tmp = sea->disconnected_queue; tmp; tmp = tmp->next)
if (scb == tmp) {
splx(oldpri);
#ifdef SEADEBUG2
printf("\\4");
#endif
if (sea_select(sea,scb)) {
#ifdef SEADEBUG2
printf("\\5");
#endif
return 0;
}
msg = MSG_ABORT;
msgptr = &msg;
len = 1;
phase = REQ_MSGOUT;
CONTROL = BASE_CMD | CMD_ATTN;
sea_transfer_pio(sea, &phase, &len, &msgptr);
oldpri = splbio();
for (prev = (struct sea_scb **) &(sea->disconnected_queue),
tmp = sea->disconnected_queue; tmp ;
prev = (struct sea_scb **) &(tmp->next), tmp = tmp->next)
if (scb == tmp) {
*prev = tmp->next;
tmp->next = NULL;
/* set some type of error result for the operation */
#ifdef SEADEBUG2
printf("\\6");
#endif
splx(oldpri);
return 1;
}
}
/* command not found in any queue, race condition in the code ? */
splx(oldpri);
#ifdef SEADEBUG2
/* printf("sea: WARNING: SCSI command probably completed successfully\n"
" before abortion\n"); */
printf("\\7");
#endif
return 1;
}
void sea_done(int unit, struct sea_scb *scb)
{
struct sea_data *sea = seadata[unit];
struct scsi_xfer *xs = scb->xfer;
#ifdef SEADEBUG2
/* printf("sea_done called\n"); */
printf("&");
#endif
if (scb->flags & SCB_TIMECHK) {
#ifdef SEADEBUG2
printf("&2");
#endif
untimeout((timeout_func_t)sea_timeout, (caddr_t)scb);
}
xs->resid = scb->datalen; /* How much of the buffer was not touched */
if ((scb->flags == SCB_ACTIVE) || (xs->flags & SCSI_ERR_OK)) {
#ifdef SEADEBUG2
/* printf("sea_done:Report no err in xs\n"); */
printf("&3");
#endif
/* xs->resid = 0; */
/* xs->error = 0; */
} else {
if (!(scb->flags == SCB_ACTIVE)) {
if ((scb->flags & SCB_TIMEOUT) || (scb->flags & SCB_ABORTED)) {
#ifdef SEADEBUG2
printf("&6");
#endif
xs->error = XS_TIMEOUT;
}
if (scb->flags & SCB_ERROR) {
#ifdef SEADEBUG2
printf("&7");
#endif
xs->error = XS_DRIVER_STUFFUP;
}
} else {
/* !!! Add code to check for target status */
/* say all error now */
xs->error = XS_DRIVER_STUFFUP;
#ifdef SEADEBUG2
printf("&4");
#endif
}
}
xs->flags |= ITSDONE;
sea_free_scb(unit, scb, xs->flags);
scsi_done(xs);
#ifdef SEADEBUG2
/* printf("Leaving sea_done\n"); */
printf("&5");
#endif
}
/* wait for completion of command in polled mode */
int sea_poll(int unit, struct scsi_xfer *xs, struct sea_scb *scb)
{
int count = 500; /* xs->timeout; */
int oldpri;
#ifdef SEADEBUG2
/* printf("sea_poll called\n"); */
printf("?");
#endif
while (count) {
/* try to do something */
oldpri = splbio();
if (!main_running) {
main_running = 1;
sea_main();
/* main_running is cleared in sea_main once it can't
* do more work, and sea_main exits with interrupts
* disabled
*/
splx(oldpri);
} else {
splx(oldpri);
}
if (xs->flags & ITSDONE) {
break;
}
DELAY(10);
count--;
}
#ifdef SEADEBUG2
printf("?2 %x ", count);
/* printf("sea_poll: count:%x\n",count); */
#endif
if (count == 0) {
/* we timed out, so call the timeout handler manually,
* accounting for the fact that the clock is not running yet
* by taking out the clock queue entry it makes.
*/
#ifdef SEADEBUG2
printf("?3");
#endif
sea_timeout((caddr_t)scb, 0);
/* because we are polling, take out the timeout entry
* sea_timeout made
*/
#ifdef SEADEBUG2
printf("?4");
#endif
untimeout((timeout_func_t)sea_timeout, (caddr_t) scb);
count = 50;
while (count) {
/* once again, wait for the int bit */
oldpri = splbio();
if (!main_running) {
main_running = 1;
sea_main();
/* main_running is cleared by sea_main once it can't
* do more work, and sea_main exits with interrupts
* disabled
*/
splx(oldpri);
} else {
splx(oldpri);
}
if (xs->flags & ITSDONE) {
break;
}
DELAY(10);
count--;
}
if (count == 0) {
/* we timed out again... This is bad. Notice that
* this time there is no clock queue entry to remove
*/
#ifdef SEADEBUG2
printf("?5");
#endif
sea_timeout((caddr_t)scb, 0);
}
}
#ifdef SEADEBUG2
/* printf("sea_poll: xs->error:%x\n",xs->error); */
printf("?6%x",xs->error);
#endif
if (xs->error) {
#ifdef SEADEBUG2
/* printf("done return error\n"); */
printf("?7");
#endif
return (HAD_ERROR);
}
#ifdef SEADEBUG2
/* printf("done return complete\n"); */
printf("?8");
#endif
return (COMPLETE);
}
/*
* sea_information_transfer
* Do the transfer. We know we are connected. Update the flags,
* call sea_done when task accomplished. Dialog controlled by the
* target
*/
static void sea_information_transfer (struct sea_data *sea)
{
long int timeout;
int unit = sea->sc_link.adapter_unit;
unsigned char msgout = MSG_NOP;
int32 len;
int oldpri;
u_char *data;
unsigned char phase, tmp, old_phase=REQ_UNKNOWN;
struct sea_scb *scb = sea->connected;
int loop, count;
#if SEADEBUG2
/* printf("sea_information_transfer called\n"); */
printf("!");
#endif
for(timeout = 0; timeout < 10000000L ; timeout++) {
tmp = STATUS;
if (!(tmp & STAT_BSY)) {
/* for(loop=0;loop < 20 ; loop++) {
if((tmp=STATUS) & STAT_BSY)
break;
} */
#ifndef SEADEBUG8
if(!(tmp & STAT_BSY)) {
printf("sea: !STAT_BSY unit in data transfer!\n");
oldpri = splbio();
sea->connected = NULL;
scb->flags = SCB_ERROR;
splx(oldpri);
sea_done(unit, scb);
return;
}
#endif
}
/* we only have a valid SCSI phase when REQ is asserted */
if (tmp & STAT_REQ) {
phase = (tmp & REQ_MASK);
if (phase != old_phase) {
old_phase = phase;
}
#ifdef SEADEBUG7
printf("!2%x", phase);
for(loop=0;loop < 20; loop++) {
phase = STATUS;
printf("!6%x",phase);
phase = phase & REQ_MASK;
}
#endif
switch (phase) {
case REQ_DATAOUT:
#ifdef SEA_NODATAOUT
printf("sea: SEA_NODATAOUT set, attempted DATAOUT aborted\n");
msgout = MSG_ABORT;
CONTROL = BASE_CMD | CMD_ATTN;
break;
#endif
case REQ_DATAIN:
/* data = scb->xfer->data;
len = scb->xfer->datalen;
*/ if(!(scb->data)) {
printf("no data address!\n");
}
#ifdef SEA_BLINDTRANSFER
if (scb->datalen && !(scb->datalen % BLOCK_SIZE)) {
while (scb->datalen) {
for(timeout = 0; timeout < 5000000L ; timeout++)
if((tmp = STATUS) & STAT_REQ)
break;
if(!(tmp & STAT_REQ)) {
printf("sea_transfer_pio: timeout waiting for STAT_REQ\n");
/* getchar(); */
}
if((tmp & REQ_MASK) != phase) {
#ifdef SEADEBUG1
printf("sea:infotransfer phase mismatch:%x, want:%x, len:%x\n",
tmp,phase,scb->datalen);
/* getchar(); */
#endif
break;
}
if(!(phase & STAT_IO)) {
#ifdef SEA_ASSEMBLER
asm("
shr $2, %%ecx;
cld;
rep;
movsl; " : :
"D" (sea->st0x_dr), "S" (scb->data), "c" (BLOCK_SIZE) :
"cx", "si", "di" );
scb->data += BLOCK_SIZE;
#else
for(count=0; count < BLOCK_SIZE; count++) {
DATA = *(scb->data);
scb->data++;
}
#endif
} else {
#ifdef SEA_ASSEMBLER
asm("
shr $2, %%ecx;
cld;
rep;
movsl; " : :
"S" (sea->st0x_dr), "D" (scb->data), "c" (BLOCK_SIZE) :
"cx", "si", "di" );
scb->data += BLOCK_SIZE;
#else
for(count=0; count < BLOCK_SIZE; count++) {
*scb->data = DATA;
scb->data++;
}
#endif
}
scb->datalen -= BLOCK_SIZE;
}
}
/* save current position into the command structure */
/* scb->xfer->data = data;
scb->xfer->datalen = len; */
#endif
sea_transfer_pio(sea, &phase, &(scb->datalen), &(scb->data));
/* scb->xfer->data = data;
scb->xfer->datalen = len;
*/ break;
case REQ_MSGIN:
/* don't handle multi-byte messages here, because they
* should not be present here
*/
len = 1;
data = &tmp;
sea_transfer_pio(sea, &phase, &len, &data);
/* scb->MessageIn = tmp; */
switch (tmp) {
case MSG_ABORT:
scb->flags = SCB_ABORTED;
printf("sea:Command aborted by target\n");
CONTROL = BASE_CMD;
sea_done(unit, scb);
return;
case MSG_COMMAND_COMPLETE:
oldpri = splbio();
sea->connected = NULL;
splx(oldpri);
#ifdef SEADEBUG2
printf("!3");
#endif
sea->busy[scb->xfer->sc_link->target] &=
~(1 << scb->xfer->sc_link->lun);
CONTROL = BASE_CMD;
sea_done(unit, scb);
return;
case MSG_MESSAGE_REJECT:
/* printf("sea: message_reject recieved\n"); */
printf("!4");
break;
case MSG_DISCONNECT:
oldpri = splbio();
scb->next = sea->disconnected_queue;
sea->disconnected_queue = scb;
sea->connected = NULL;
CONTROL = BASE_CMD;
splx(oldpri);
#ifdef SEADEBUG2
/* printf("msg_disconnect\n"); */
printf("!5");
#endif
return;
/* save/restore of pointers are ignored */
case MSG_SAVE_POINTERS:
case MSG_RESTORE_POINTERS:
#if SEADEBUG2
printf("sea: rec save/restore ptrs\n");
#endif
break;
default:
/* this should be handled in the pio data transfer phase, as the
* ATN should be raised before ACK goes false when rejecting a message
*/
#ifdef SEADEBUG
printf("sea: Unknown message in:%x\n", tmp);
#endif
break;
} /* switch (tmp) */
break;
case REQ_MSGOUT:
len = 1;
data = &msgout;
/* sea->last_message = msgout; */
sea_transfer_pio(sea, &phase, &len, &data);
if (msgout == MSG_ABORT) {
printf("sea: sent message abort to target\n");
oldpri = splbio();
sea->busy[scb->xfer->sc_link->target] &=
~(1 << scb->xfer->sc_link->lun);
sea->connected = NULL;
scb->flags = SCB_ABORTED;
splx(oldpri);
/* enable interrupt from scsi */
sea_done(unit, scb);
return;
}
msgout = MSG_NOP;
break;
case REQ_CMDOUT:
len = scb->xfer->cmdlen;
data = (char *) scb->xfer->cmd;
sea_transfer_pio(sea, &phase, &len, &data);
break;
case REQ_STATIN:
len = 1;
data = &tmp;
sea_transfer_pio(sea, &phase, &len, &data);
scb->xfer->status = tmp;
break;
default:
printf("sea: unknown phase\n");
} /* switch (phase) */
} /* if (tmp & STAT_REQ) */
} /* for (...) */
/* if we get here we have got a timeout! */
printf("sea: Timeout in data transfer\n");
scb->flags = SCB_TIMEOUT;
/* should I clear scsi-bus state? */
sea_done(unit, scb);
}
I do not speak for the Worker's Compensation Board of Queensland -
They don't pay me enough for that!
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