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Revised drivers from Julian.
[unix-history] / sys / i386 / isa / ultra14f.c
/*
* Ported for use with the UltraStor 14f by Gary Close (gclose@wvnvms.wvnet.edu)
* Thanks to Julian Elischer for advice and help with this port.
*
* 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.
*
* commenced: Sun Sep 27 18:14:01 PDT 1992
* slight mod to make work with 34F as well: Wed Jun 2 18:05:48 WST 1993
*
* $Id: ultra14f.c,v 1.5 93/08/26 21:12:28 julian Exp Locker: julian $
*/
#include <sys/types.h>
#include <uha.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#ifdef MACH /* EITHER CMU OR OSF */
#include <i386/ipl.h>
#include <i386at/scsi.h>
#include <i386at/scsiconf.h>
#ifdef OSF /* OSF ONLY */
#include <sys/table.h>
#include <i386/handler.h>
#include <i386/dispatcher.h>
#include <i386/AT386/atbus.h>
#else OSF /* CMU ONLY */
#include <i386at/atbus.h>
#include <i386/pio.h>
#endif OSF
#endif MACH /* end of MACH specific */
#ifdef __386BSD__ /* 386BSD specific */
#define isa_dev isa_device
#define dev_unit id_unit
#define dev_addr id_iobase
#include <i386/include/pio.h>
#include <i386/isa/isa_device.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#endif __386BSD__
/*\f*/
#ifdef __386BSD__
#include "ddb.h"
#if NDDB > 0
int Debugger();
#else NDDB
#define Debugger() panic("should call debugger here")
#endif NDDB
#endif __386BSD__
#ifdef MACH
int Debugger();
#endif MACH
typedef struct {unsigned char addr[4]; } physaddr;
typedef struct {unsigned char len[4]; } physlen;
#ifdef MACH
extern physaddr kvtophys();
#define PHYSTOKV(x) phystokv(x)
#define KVTOPHYS(x) kvtophys(x)
#endif MACH
#ifdef __386BSD__
#define PHYSTOKV(x) (x | 0xFE000000)
#define KVTOPHYS(x) vtophys(x)
#endif __386BSD__
extern int hz;
extern int delaycount; /* from clock setup code */
#define NUM_CONCURRENT 16 /* number of concurrent ops per board */
#define UHA_NSEG 33 /* number of dma segments supported */
#define FUDGE(X) (X>>1) /* our loops are slower than spinwait() */
/*\f*/
/************************** board definitions *******************************/
/*
* I/O Port Interface
*/
#define UHA_LMASK (0x000) /* local doorbell mask reg */
#define UHA_LINT (0x001) /* local doorbell int/stat reg */
#define UHA_SMASK (0x002) /* system doorbell mask reg */
#define UHA_SINT (0x003) /* system doorbell int/stat reg */
#define UHA_ID0 (0x004) /* product id reg 0 */
#define UHA_ID1 (0x005) /* product id reg 1 */
#define UHA_CONF1 (0x006) /* config reg 1 */
#define UHA_CONF2 (0x007) /* config reg 2 */
#define UHA_OGM0 (0x008) /* outgoing mail ptr 0 least sig */
#define UHA_OGM1 (0x009) /* outgoing mail ptr 1 least mid */
#define UHA_OGM2 (0x00a) /* outgoing mail ptr 2 most mid */
#define UHA_OGM3 (0x00b) /* outgoing mail ptr 3 most sig */
#define UHA_ICM0 (0x00c) /* incoming mail ptr 0 */
#define UHA_ICM1 (0x00d) /* incoming mail ptr 1 */
#define UHA_ICM2 (0x00e) /* incoming mail ptr 2 */
#define UHA_ICM3 (0x00f) /* incoming mail ptr 3 */
/*
* UHA_LMASK bits (read only)
*/
#define UHA_LDIE 0x80 /* local doorbell int enabled */
#define UHA_SRSTE 0x40 /* soft reset enabled */
#define UHA_ABORTEN 0x10 /* abort MSCP enabled */
#define UHA_OGMINTEN 0x01 /* outgoing mail interrupt enabled */
/*
* UHA_LINT bits (read)
*/
#define UHA_LDIP 0x80 /* local doorbell int pending */
/*
* UHA_LINT bits (write)
*/
#define UHA_ADRST 0x40 /* adapter soft reset */
#define UHA_SBRST 0x20 /* scsi bus reset */
#define UHA_ASRST 0x60 /* adapter and scsi reset */
#define UHA_ABORT 0x10 /* abort MSCP */
#define UHA_OGMINT 0x01 /* tell adapter to get mail */
/*
* UHA_SMASK bits (read)
*/
#define UHA_SINTEN 0x80 /* system doorbell interupt Enabled */
#define UHA_ABORT_COMPLETE_EN 0x10 /* abort MSCP command complete int Enabled */
#define UHA_ICM_ENABLED 0x01 /* ICM interrupt enabled
/*
* UHA_SMASK bits (write)
*/
#define UHA_ENSINT 0x80 /* enable system doorbell interrupt */
#define UHA_EN_ABORT_COMPLETE 0x10 /* enable abort MSCP complete int */
#define UHA_ENICM 0x01 /* enable ICM interrupt */
/*
* UHA_SINT bits (read)
*/
#define UHA_SINTP 0x80 /* system doorbell int pending */
#define UHA_ABORT_SUCC 0x10 /* abort MSCP successful */
#define UHA_ABORT_FAIL 0x18 /* abort MSCP failed */
/*
* UHA_SINT bits (write)
*/
#define UHA_ABORT_ACK 0x18 /* acknowledge status and clear */
#define UHA_ICM_ACK 0x01 /* acknowledge ICM and clear */
/*
* UHA_CONF1 bits (read only)
*/
#define UHA_DMA_CH5 0x00 /* DMA channel 5 */
#define UHA_DMA_CH6 0x40 /* 6 */
#define UHA_DMA_CH7 0x80 /* 7 */
#define UHA_IRQ15 0x00 /* IRQ 15 */
#define UHA_IRQ14 0x10 /* 14 */
#define UHA_IRQ11 0x20 /* 11 */
#define UHA_IRQ10 0x30 /* 10 */
/***********************************
* ha_status error codes
\***********************************/
#define UHA_NO_ERR 0x00 /* No error supposedly */
#define UHA_SBUS_ABORT_ERR 0x84 /* scsi bus abort error */
#define UHA_SBUS_TIMEOUT 0x91 /* scsi bus selection timeout */
#define UHA_SBUS_OVER_UNDER 0x92 /* scsi bus over/underrun */
#define UHA_BAD_SCSI_CMD 0x96 /* illegal scsi command */
#define UHA_AUTO_SENSE_ERR 0x9b /* auto request sense err */
#define UHA_SBUS_RES_ERR 0xa3 /* scsi bus reset error */
#define UHA_BAD_SG_LIST 0xff /* invalid scatter gath list */
/*\f*/
struct uha_dma_seg
{
physaddr addr;
physlen len;
};
/*\f*/
struct mscp
{
unsigned char opcode:3;
#define U14_HAC 0x01 /*host adapter command*/
#define U14_TSP 0x02 /*target scsi pass through command*/
#define U14_SDR 0x04 /*scsi device reset*/
unsigned char xdir:2; /*xfer direction*/
#define U14_SDET 0x00 /*determined by scsi command*/
#define U14_SDIN 0x01 /*scsi data in*/
#define U14_SDOUT 0x02 /*scsi data out*/
#define U14_NODATA 0x03 /*no data xfer*/
unsigned char dcn:1; /*disable disconnect for this command*/
unsigned char ca:1; /*Cache control*/
unsigned char sgth:1; /*scatter gather flag*/
unsigned char target:3;
unsigned char chan:2; /*scsi channel (always 0 for 14f)*/
unsigned char lun:3;
physaddr data;
physlen datalen;
physaddr link;
unsigned char link_id;
unsigned char sg_num; /*number of scat gath segs */
/*in s-g list if sg flag is*/
/*set. starts at 1, 8bytes per*/
unsigned char senselen;
unsigned char cdblen;
unsigned char cdb[12];
unsigned char ha_status;
unsigned char targ_status;
physaddr sense; /* if 0 no auto sense */
/*-----------------end of hardware supported fields----------------*/
struct mscp *next; /* in free list */
struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
int flags;
#define MSCP_FREE 0
#define MSCP_ACTIVE 1
#define MSCP_ABORTED 2
struct uha_dma_seg uha_dma[UHA_NSEG];
struct scsi_sense_data mscp_sense;
};
/*\f*/
struct uha_data
{
int flags;
#define UHA_INIT 0x01;
int baseport;
struct mscp mscps[NUM_CONCURRENT];
struct mscp *free_mscp;
int our_id; /* our scsi id */
int vect;
int dma;
} uha_data[NUHA];
int uhaprobe();
int uha_attach();
int uhaintr();
int uha_scsi_cmd();
int uha_timeout();
int uha_abort();
struct mscp *cheat;
void uhaminphys();
long int uha_adapter_info();
unsigned long int scratch;
#ifdef MACH
struct isa_driver uhadriver = { uhaprobe, 0, uha_attach, "uha", 0, 0, 0};
int (*uhaintrs[])() = {uhaintr, 0};
#endif MACH
#ifdef __386BSD__
struct isa_driver uhadriver = { uhaprobe, uha_attach, "uha"};
#endif __386BSD__
static uha_unit = 0;
#ifdef UHADEBUG
int uha_debug = 0;
#endif /*UHADEBUG*/
#define UHA_SHOWMSCPS 0x01
#define UHA_SHOWINTS 0x02
#define UHA_SHOWCMDS 0x04
#define UHA_SHOWMISC 0x08
#define FAIL 1
#define SUCCESS 0
#define PAGESIZ 4096
struct scsi_switch uha_switch =
{
uha_scsi_cmd,
uhaminphys,
0,
0,
uha_adapter_info,
"uha",
0,0
};
/*\f*/
/***********************************************************************\
* Function to send a command out through a mailbox *
\***********************************************************************/
uha_send_mbox( int unit
,struct mscp *mscp)
{
int port = uha_data[unit].baseport;
int spincount = FUDGE(delaycount) * 1000; /* 1s should be enough */
int s = splbio();
while( ((inb(port + UHA_LINT) & (UHA_LDIP))
!= (0))
&& (spincount--));
if(spincount == -1)
{
printf("uha%d: uha_send_mbox, board not responding\n",unit);
Debugger();
}
outl(port + UHA_OGM0,KVTOPHYS(mscp));
outb(port + UHA_LINT, (UHA_OGMINT));
splx(s);
}
/***********************************************************************\
* Function to send abort to 14f *
\***********************************************************************/
uha_abort( int unit
,struct mscp *mscp)
{
int port = uha_data[unit].baseport;
int spincount = FUDGE(delaycount) * 1;
int abortcount = FUDGE(delaycount) * 2000;
int s = splbio();
while(((inb(port + UHA_LINT) & (UHA_LDIP))
!= (0))
&& (spincount--));
if(spincount == -1);
{
printf("uha%d: uha_abort, board not responding\n",unit);
Debugger();
}
outl(port + UHA_OGM0,KVTOPHYS(mscp));
outb(port + UHA_LINT,UHA_ABORT);
while((abortcount--) && (!(inb(port + UHA_SINT) & UHA_ABORT_FAIL)));
if(abortcount == -1)
{
printf("uha%d: uha_abort, board not responding\n",unit);
Debugger();
}
if((inb(port + UHA_SINT) & 0x10) != 0)
{
outb(port + UHA_SINT,UHA_ABORT_ACK);
return(1);
}
else
{
outb(port + UHA_SINT,UHA_ABORT_ACK);
return(0);
}
}
/***********************************************************************\
* Function to poll for command completion when in poll mode *
\***********************************************************************/
uha_poll(int unit ,int wait) /* in msec */
{
int port = uha_data[unit].baseport;
int spincount = FUDGE(delaycount) * wait; /* in msec */
int stport = port + UHA_SINT;
int start = spincount;
retry:
while( (spincount--) && (!(inb(stport) & UHA_SINTP)));
if(spincount == -1)
{
printf("uha%d: uha_poll, board not responding\n",unit);
return(EIO);
}
if ((int)cheat != PHYSTOKV(inl(port + UHA_ICM0)))
{
printf("uha%d: discarding %x\n",unit,inl(port + UHA_ICM0));
outb(port + UHA_SINT, UHA_ICM_ACK);
spinwait(50);
goto retry;
}/* don't know this will work */
uhaintr(unit);
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_dev structure from *
* autoconf.c *
\*******************************************************/
uhaprobe(dev)
struct isa_dev *dev;
{
int unit = uha_unit;
dev->dev_unit = unit;
uha_data[unit].baseport = dev->dev_addr;
if(unit >= NUHA)
{
printf("uha%d: unit number too high\n",unit);
return(0);
}
/*try and initialize unit at this location*/
if (uha_init(unit) != 0)
{
return(0);
}
/* if its there put in it's interrupt and DRQ vectors */
dev->id_irq = (1 << uha_data[unit].vect);
dev->id_drq = uha_data[unit].dma;
uha_unit ++;
return(1);
}
/***********************************************\
* Attach all the sub-devices we can find *
\***********************************************/
uha_attach(dev)
struct isa_dev *dev;
{
int unit = dev->dev_unit;
/***********************************************\
* ask the adapter what subunits are present *
\***********************************************/
scsi_attachdevs( unit, uha_data[unit].our_id, &uha_switch);
#if defined(OSF)
uha_attached[unit]=1;
#endif /* defined(OSF) */
return;
}
/***********************************************\
* Return some information to the caller about *
* the adapter and it's capabilities *
\***********************************************/
long int uha_adapter_info(unit)
int unit;
{
return(2); /* 2 outstanding requests at a time per device */
}
/***********************************************\
* Catch an interrupt from the adaptor *
\***********************************************/
uhaintr(unit)
{
struct mscp *mscp;
u_char uhastat;
unsigned long int mboxval;
int port = uha_data[unit].baseport;
#ifdef UHADEBUG
if(scsi_debug & PRINTROUTINES)
printf("uhaintr ");
#endif /*UHADEBUG*/
#if defined(OSF)
if (!uha_attached[unit])
{
return(1);
}
#endif /* defined(OSF) */
while(inb(port + UHA_SINT) & UHA_SINTP)
{
/***********************************************\
* First get all the information and then *
* acknowlege the interrupt *
\***********************************************/
uhastat = inb(port + UHA_SINT);
mboxval = inl(port + UHA_ICM0);
outb(port + UHA_SINT,UHA_ICM_ACK);
#ifdef UHADEBUG
if(scsi_debug & TRACEINTERRUPTS)
printf("status = 0x%x ",uhastat);
#endif /*UHADEBUG*/
/***********************************************\
* Process the completed operation *
\***********************************************/
mscp = (struct mscp *)(PHYSTOKV(mboxval));
#ifdef UHADEBUG
if(uha_debug & UHA_SHOWCMDS )
{
uha_show_scsi_cmd(mscp->xs);
}
if((uha_debug & UHA_SHOWMSCPS) && mscp)
printf("<int mscp(%x)>",mscp);
#endif /*UHADEBUG*/
untimeout(uha_timeout,mscp);
uha_done(unit,mscp);
}
return(1);
}
/***********************************************\
* We have a mscp which has been processed by the *
* adaptor, now we look to see how the operation *
* went. *
\***********************************************/
uha_done(unit,mscp)
int unit;
struct mscp *mscp;
{
struct scsi_sense_data *s1,*s2;
struct scsi_xfer *xs = mscp->xs;
#ifdef UHADEBUG
if(scsi_debug & (PRINTROUTINES | TRACEINTERRUPTS))
printf("uha_done ");
#endif /*UHADEBUG*/
/***********************************************\
* Otherwise, put the results of the operation *
* into the xfer and call whoever started it *
\***********************************************/
if ( (mscp->ha_status == UHA_NO_ERR) || (xs->flags & SCSI_ERR_OK))
{ /* All went correctly OR errors expected */
xs->resid = 0;
xs->error = 0;
}
else
{
s1 = &(mscp->mscp_sense);
s2 = &(xs->sense);
if(mscp->ha_status != UHA_NO_ERR)
{
switch(mscp->ha_status)
{
case UHA_SBUS_TIMEOUT: /* No response */
#ifdef UHADEBUG
if (uha_debug & UHA_SHOWMISC)
{
printf("timeout reported back\n");
}
#endif /*UHADEBUG*/
xs->error = XS_TIMEOUT;
break;
case UHA_SBUS_OVER_UNDER:
#ifdef UHADEBUG
if (uha_debug & UHA_SHOWMISC)
{
printf("scsi bus xfer over/underrun\n");
}
#endif /*UHADEBUG*/
xs->error = XS_DRIVER_STUFFUP;
break;
case UHA_BAD_SG_LIST:
#ifdef UHADEBUG
if (uha_debug & UHA_SHOWMISC)
{
printf("bad sg list reported back\n");
}
#endif /*UHADEBUG*/
xs->error = XS_DRIVER_STUFFUP;
break;
default: /* Other scsi protocol messes */
xs->error = XS_DRIVER_STUFFUP;
#ifdef UHADEBUG
if (uha_debug & UHA_SHOWMISC)
{
printf("unexpected ha_status: %x\n",
mscp->ha_status);
}
#endif /*UHADEBUG*/
}
}
else
{
if (mscp->targ_status != 0)
/**************************************************************************\
* I have no information for any possible value of target status field *
* other than 0 means no error!! So I guess any error is unexpected in that *
* event!! *
\**************************************************************************/
{
#ifdef UHADEBUG
if (uha_debug & UHA_SHOWMISC)
{
printf("unexpected targ_status: %x\n",
mscp->targ_status);
}
#endif /*UHADEBUG*/
xs->error = XS_DRIVER_STUFFUP;
}
}
}
done: xs->flags |= ITSDONE;
uha_free_mscp(unit,mscp, xs->flags);
if(xs->when_done)
(*(xs->when_done))(xs->done_arg,xs->done_arg2);
}
/***********************************************\
* A mscp (and hence a mbx-out is put onto the *
* free list. *
\***********************************************/
uha_free_mscp(unit,mscp, flags)
struct mscp *mscp;
{
unsigned int opri;
#ifdef UHADEBUG
if(scsi_debug & PRINTROUTINES)
printf("mscp%d(0x%x)> ",unit,flags);
#endif /*UHADEBUG*/
if (!(flags & SCSI_NOMASK))
opri = splbio();
mscp->next = uha_data[unit].free_mscp;
uha_data[unit].free_mscp = mscp;
mscp->flags = MSCP_FREE;
/***********************************************\
* If there were none, wake abybody waiting for *
* one to come free, starting with queued entries*
\***********************************************/
if (!mscp->next) {
wakeup(&uha_data[unit].free_mscp);
}
if (!(flags & SCSI_NOMASK))
splx(opri);
}
/***********************************************\
* Get a free mscp (and hence mbox-out entry) *
\***********************************************/
struct mscp *
uha_get_mscp(unit,flags)
{
unsigned opri;
struct mscp *rc;
#ifdef UHADEBUG
if(scsi_debug & PRINTROUTINES)
printf("<mscp%d(0x%x) ",unit,flags);
#endif /*UHADEBUG*/
if (!(flags & SCSI_NOMASK))
opri = splbio();
/***********************************************\
* If we can and have to, sleep waiting for one *
* to come free *
\***********************************************/
while ((!(rc = uha_data[unit].free_mscp)) && (!(flags & SCSI_NOSLEEP)))
{
sleep(&uha_data[unit].free_mscp, PRIBIO);
}
if (rc)
{
uha_data[unit].free_mscp = rc->next;
rc->flags = MSCP_ACTIVE;
}
if (!(flags & SCSI_NOMASK))
splx(opri);
return(rc);
}
/***********************************************\
* Start the board, ready for normal operation *
\***********************************************/
uha_init(unit)
int unit;
{
unsigned char ad[4];
volatile unsigned char model;
volatile unsigned char submodel;
unsigned char config_reg1;
unsigned char config_reg2;
unsigned char dma_ch;
unsigned char irq_ch;
unsigned char uha_id;
int port = uha_data[unit].baseport;
int i;
int resetcount = FUDGE(delaycount) * 4000;
model = inb(port + UHA_ID0);
submodel = inb(port + UHA_ID1);
if ((model != 0x56) & (submodel != 0x40))
{ printf("uha%d: uha_init, board not responding\n",unit);
return(ENXIO); }
printf("uha%d: reading board settings, ",unit);
config_reg1 = inb(port + UHA_CONF1);
config_reg2 = inb(port + UHA_CONF2);
dma_ch = (config_reg1 & 0xc0);
irq_ch = (config_reg1 & 0x30);
uha_id = (config_reg2 & 0x07);
switch(dma_ch)
{
case UHA_DMA_CH5:
uha_data[unit].dma = 5;
printf("dma=5 ");
break;
case UHA_DMA_CH6:
uha_data[unit].dma = 6;
printf("dma=6 ");
break;
case UHA_DMA_CH7:
uha_data[unit].dma = 7;
printf("dma=7 ");
break;
default:
printf("illegal dma jumper setting\n");
return(EIO);
}
switch(irq_ch)
{
case UHA_IRQ10:
uha_data[unit].vect = 10;
printf("int=10 ");
break;
case UHA_IRQ11:
uha_data[unit].vect = 11;
printf("int=11 ");
break;
case UHA_IRQ14:
uha_data[unit].vect = 14;
printf("int=14 ");
break;
case UHA_IRQ15:
uha_data[unit].vect = 15;
printf("int=15 ");
break;
default:
printf("illegal int jumper setting\n");
return(EIO);
}
/* who are we on the scsi bus */
printf("id=%x\n",uha_id);
uha_data[unit].our_id = uha_id;
/***********************************************\
* link up all our MSCPs into a free list *
\***********************************************/
for (i=0; i < NUM_CONCURRENT; i++)
{
uha_data[unit].mscps[i].next = uha_data[unit].free_mscp;
uha_data[unit].free_mscp = &uha_data[unit].mscps[i];
uha_data[unit].free_mscp->flags = MSCP_FREE;
}
/***********************************************\
* Note that we are going and return (to probe) *
\***********************************************/
outb(port + UHA_LINT, UHA_ASRST);
while( (resetcount--) && (!(inb(port + UHA_LINT))));
if(resetcount == -1)
{
printf("uha%d: board timed out during reset\n",unit);
return(ENXIO);
}
outb(port + UHA_SMASK, 0x81); /* make sure interrupts are enabled */
uha_data[unit].flags |= UHA_INIT;
return(0);
}
#ifndef min
#define min(x,y) (x < y ? x : y)
#endif min
void uhaminphys(bp)
struct buf *bp;
{
#ifdef MACH
#if !defined(OSF)
bp->b_flags |= B_NPAGES; /* can support scat/gather */
#endif /* defined(OSF) */
#endif MACH
if(bp->b_bcount > ((UHA_NSEG-1) * PAGESIZ))
{
bp->b_bcount = ((UHA_NSEG-1) * PAGESIZ);
}
}
/***********************************************\
* start a scsi operation given the command and *
* the data address. Also needs the unit, target *
* and lu *
\***********************************************/
int uha_scsi_cmd(xs)
struct scsi_xfer *xs;
{
struct scsi_sense_data *s1,*s2;
struct mscp *mscp;
struct uha_dma_seg *sg;
int seg; /* scatter gather seg being worked on */
int i = 0;
int rc = 0;
int thiskv;
unsigned long int thisphys,nextphys;
int unit =xs->adapter;
int bytes_this_seg,bytes_this_page,datalen,flags;
struct iovec *iovp;
int s;
unsigned int stat;
int port = uha_data[unit].baseport;
unsigned long int templen;
#ifdef UHADEBUG
if(scsi_debug & PRINTROUTINES)
printf("uha_scsi_cmd ");
#endif /*UHADEBUG*/
/***********************************************\
* get a mscp (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(xs->bp) flags |= (SCSI_NOSLEEP); /* just to be sure */
if(flags & ITSDONE)
{
printf("uha%d: Already done?",unit);
xs->flags &= ~ITSDONE;
}
if(!(flags & INUSE))
{
printf("uha%d: Not in use?",unit);
xs->flags |= INUSE;
}
if (!(mscp = uha_get_mscp(unit,flags)))
{
xs->error = XS_DRIVER_STUFFUP;
return(TRY_AGAIN_LATER);
}
cheat = mscp;
#ifdef UHADEBUG
if(uha_debug & UHA_SHOWMSCPS)
printf("<start mscp(%x)>",mscp);
if(scsi_debug & SHOWCOMMANDS)
{
uha_show_scsi_cmd(xs);
}
#endif /*UHADEBUG*/
mscp->xs = xs;
/***********************************************\
* Put all the arguments for the xfer in the mscp *
\***********************************************/
if (flags & SCSI_RESET)
{
mscp->opcode = 0x04;
mscp->ca = 0x01;
}
else
{
mscp->opcode = 0x02;
mscp->ca = 0x01;
}
if (flags & SCSI_DATA_IN)
{
mscp->xdir = 0x01;
}
if (flags & SCSI_DATA_OUT)
{
mscp->xdir = 0x02;
}
if (xs->lu != 0)
{
xs->error = XS_DRIVER_STUFFUP;
uha_free_mscp(unit,mscp,flags);
return(HAD_ERROR);
}
mscp->dcn = 0x00;
mscp->chan = 0x00;
mscp->target = xs->targ;
mscp->lun = xs->lu;
mscp->link.addr[0] = 0x00;
mscp->link.addr[1] = 0x00;
mscp->link.addr[2] = 0x00;
mscp->link.addr[3] = 0x00;
mscp->link_id = 0x00;
mscp->cdblen = xs->cmdlen;
scratch = KVTOPHYS(&(mscp->mscp_sense));
mscp->sense.addr[0] = (scratch & 0xff);
mscp->sense.addr[1] = ((scratch >> 8) & 0xff);
mscp->sense.addr[2] = ((scratch >> 16) & 0xff);
mscp->sense.addr[3] = ((scratch >> 24) & 0xff);
mscp->senselen = sizeof(mscp->mscp_sense);
mscp->ha_status = 0x00;
mscp->targ_status = 0x00;
if(xs->datalen)
{ /* should use S/G only if not zero length */
scratch = KVTOPHYS(mscp->uha_dma);
mscp->data.addr[0] = (scratch & 0xff);
mscp->data.addr[1] = ((scratch >> 8) & 0xff);
mscp->data.addr[2] = ((scratch >> 16) & 0xff);
mscp->data.addr[3] = ((scratch >> 24) & 0xff);
sg = mscp->uha_dma ;
seg = 0;
mscp->sgth = 0x01;
if(flags & SCSI_DATA_UIO)
{
iovp = ((struct uio *)xs->data)->uio_iov;
datalen = ((struct uio *)xs->data)->uio_iovcnt;
xs->datalen = 0;
while ((datalen) && (seg < UHA_NSEG))
{
scratch = (unsigned long)iovp->iov_base;
sg->addr.addr[0] = (scratch & 0xff);
sg->addr.addr[1] = ((scratch >> 8) & 0xff);
sg->addr.addr[2] = ((scratch >> 16) & 0xff);
sg->addr.addr[3] = ((scratch >> 24) & 0xff);
xs->datalen += *(unsigned long *)sg->len.len = iovp->iov_len;
#ifdef UHADEBUG
if(scsi_debug & SHOWSCATGATH)
printf("(0x%x@0x%x)"
,iovp->iov_len
,iovp->iov_base);
#endif /*UHADEBUG*/
sg++;
iovp++;
seg++;
datalen--;
}
}
else
{
/***********************************************\
* Set up the scatter gather block *
\***********************************************/
#ifdef UHADEBUG
if(scsi_debug & SHOWSCATGATH)
printf("%d @0x%x:- ",xs->datalen,xs->data);
#endif /*UHADEBUG*/
datalen = xs->datalen;
thiskv = (int)xs->data;
thisphys = KVTOPHYS(thiskv);
templen = 0;
while ((datalen) && (seg < UHA_NSEG))
{
bytes_this_seg = 0;
/* put in the base address */
sg->addr.addr[0] = (thisphys & 0xff);
sg->addr.addr[1] = ((thisphys >> 8) & 0xff);
sg->addr.addr[2] = ((thisphys >> 16) & 0xff);
sg->addr.addr[3] = ((thisphys >> 24) & 0xff);
#ifdef UHADEBUG
if(scsi_debug & SHOWSCATGATH)
printf("0x%x",thisphys);
#endif /*UHADEBUG*/
/* do it at least once */
nextphys = thisphys;
while ((datalen) && (thisphys == nextphys))
/*********************************************\
* This page is contiguous (physically) with *
* the the last, just extend the length *
\*********************************************/
{
/* how far to the end of the page */
nextphys = (thisphys & (~(PAGESIZ - 1)))
+ PAGESIZ;
bytes_this_page = 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 *
\********************************************/
#ifdef UHADEBUG
if(scsi_debug & SHOWSCATGATH)
printf("(0x%x)",bytes_this_seg);
#endif /*UHADEBUG*/
sg->len.len[0] = (bytes_this_seg & 0xff);
sg->len.len[1] = ((bytes_this_seg >> 8) & 0xff);
sg->len.len[2] = ((bytes_this_seg >> 16) & 0xff);
sg->len.len[3] = ((bytes_this_seg >> 24) & 0xff);
templen += bytes_this_seg;
sg++;
seg++;
}
} /*end of iov/kv decision */
mscp->datalen.len[0] = (templen & 0xff);
mscp->datalen.len[1] = ((templen >> 8) & 0xff);
mscp->datalen.len[2] = ((templen >> 16) & 0xff);
mscp->datalen.len[3] = ((templen >> 24) & 0xff);
mscp->sg_num = seg;
#ifdef UHADEBUG
if(scsi_debug & SHOWSCATGATH)
printf("\n");
#endif /*UHADEBUG*/
if (datalen)
{ /* there's still data, must have run out of segs! */
printf("uha%d: uha_scsi_cmd, more than %d DMA segs\n",
unit,UHA_NSEG);
xs->error = XS_DRIVER_STUFFUP;
uha_free_mscp(unit,mscp,flags);
return(HAD_ERROR);
}
}
else
{ /* No data xfer, use non S/G values */
mscp->data.addr[0] = 0x00;
mscp->data.addr[1] = 0x00;
mscp->data.addr[2] = 0x00;
mscp->data.addr[3] = 0x00;
mscp->datalen.len[0] = 0x00;
mscp->datalen.len[1] = 0x00;
mscp->datalen.len[2] = 0x00;
mscp->datalen.len[3] = 0x00;
mscp->xdir = 0x03;
mscp->sgth = 0x00;
mscp->sg_num = 0x00;
}
/***********************************************\
* Put the scsi command in the mscp and start it *
\***********************************************/
bcopy(xs->cmd, mscp->cdb, xs->cmdlen);
/***********************************************\
* Usually return SUCCESSFULLY QUEUED *
\***********************************************/
if (!(flags & SCSI_NOMASK))
{
s = splbio();
uha_send_mbox(unit,mscp);
timeout(uha_timeout,mscp,(xs->timeout * hz) / 1000);
splx(s);
#ifdef UHADEBUG
if(scsi_debug & TRACEINTERRUPTS)
printf("cmd_sent ");
#endif /*UHADEBUG*/
return(SUCCESSFULLY_QUEUED);
}
/***********************************************\
* If we can't use interrupts, poll on completion*
\***********************************************/
uha_send_mbox(unit,mscp);
#ifdef UHADEBUG
if(scsi_debug & TRACEINTERRUPTS)
printf("cmd_wait ");
#endif /*UHADEBUG*/
do
{
if(uha_poll(unit,xs->timeout))
{
if (!(xs->flags & SCSI_SILENT))
printf("uha%d: cmd fail\n",unit);
if(!(uha_abort(unit,mscp)))
{
printf("uha%d: abort failed in wait\n",unit);
uha_free_mscp(unit,mscp,flags);
}
xs->error = XS_DRIVER_STUFFUP;
return(HAD_ERROR);
}
} while (!(xs->flags & ITSDONE));/* something (?) else finished */
if(xs->error)
{
return(HAD_ERROR);
}
return(COMPLETE);
}
uha_timeout(struct mscp *mscp)
{
int unit;
int s = splbio();
int port = uha_data[unit].baseport;
unit = mscp->xs->adapter;
printf("uha%d:%d device timed out\n",unit
,mscp->xs->targ);
#ifdef UHADEBUG
if(uha_debug & UHA_SHOWMSCPS)
uha_print_active_mscp(unit);
#endif /*UHADEBUG*/
if((uha_abort(unit,mscp) !=1) || (mscp->flags = MSCP_ABORTED))
{
printf("AGAIN");
mscp->xs->retries = 0; /* I MEAN IT ! */
uha_done(unit,mscp,FAIL);
}
else /* abort the operation that has timed out */
{
printf("\n");
timeout(uha_timeout,mscp,2 * hz);
mscp->flags = MSCP_ABORTED;
}
splx(s);
}
uha_show_scsi_cmd(struct scsi_xfer *xs)
{
u_char *b = (u_char *)xs->cmd;
int i = 0;
if(!(xs->flags & SCSI_RESET))
{
printf("uha%d:%d:%d-"
,xs->adapter
,xs->targ
,xs->lu);
while(i < xs->cmdlen )
{
if(i) printf(",");
printf("%x",b[i++]);
}
printf("-\n");
}
else
{
printf("uha%d:%d:%d-RESET-\n"
,xs->adapter
,xs->targ
,xs->lu
);
}
}
uha_print_mscp(mscp)
struct mscp *mscp;
{
printf("mscp:%x op:%x cmdlen:%d senlen:%d\n"
,mscp
,mscp->opcode
,mscp->cdblen
,mscp->senselen);
printf(" sg:%d sgnum:%x datlen:%d hstat:%x tstat:%x flags:%x\n"
,mscp->sgth
,mscp->sg_num
,mscp->datalen
,mscp->ha_status
,mscp->targ_status
,mscp->flags);
uha_show_scsi_cmd(mscp->xs);
}
uha_print_active_mscp(int unit)
{
struct mscp *mscp = uha_data[unit].mscps;
int i = NUHA;
while(i--)
{
if(mscp->flags != MSCP_FREE)
uha_print_mscp(mscp);
mscp++;
}
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.