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BSD 4_2 release
[unix-history] / usr / src / sys / vaxuba / uda.c
/* uda.c 6.1 83/07/29 */
#include "ra.h"
#if NUDA > 0
/*
* UDA50/RAxx disk device driver
*
* Restrictions:
* Unit numbers must be less than 8.
*
* TO DO:
* write dump code
*/
#include "../machine/pte.h"
#include "../h/param.h"
#include "../h/systm.h"
#include "../h/buf.h"
#include "../h/conf.h"
#include "../h/dir.h"
#include "../h/user.h"
#include "../h/map.h"
#include "../h/vm.h"
#include "../h/dk.h"
#include "../h/cmap.h"
#include "../h/uio.h"
#include "../vax/cpu.h"
#include "../vaxuba/ubareg.h"
#include "../vaxuba/ubavar.h"
#define NRSPL2 3 /* log2 number of response packets */
#define NCMDL2 3 /* log2 number of command packets */
#define NRSP (1<<NRSPL2)
#define NCMD (1<<NCMDL2)
#include "../vaxuba/udareg.h"
#include "../vax/mscp.h"
struct uda_softc {
short sc_state; /* state of controller */
short sc_mapped; /* Unibus map allocated for uda struct? */
int sc_ubainfo; /* Unibus mapping info */
struct uda *sc_uda; /* Unibus address of uda struct */
int sc_ivec; /* interrupt vector address */
short sc_credits; /* transfer credits */
short sc_lastcmd; /* pointer into command ring */
short sc_lastrsp; /* pointer into response ring */
} uda_softc[NUDA];
/*
* Controller states
*/
#define S_IDLE 0 /* hasn't been initialized */
#define S_STEP1 1 /* doing step 1 init */
#define S_STEP2 2 /* doing step 2 init */
#define S_STEP3 3 /* doing step 3 init */
#define S_SCHAR 4 /* doing "set controller characteristics" */
#define S_RUN 5 /* running */
struct uda {
struct udaca uda_ca; /* communications area */
struct mscp uda_rsp[NRSP]; /* response packets */
struct mscp uda_cmd[NCMD]; /* command packets */
} uda[NUDA];
/* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */
struct size {
daddr_t nblocks;
daddr_t blkoff;
} ra_sizes[8] ={
15884, 0, /* A=blk 0 thru 15883 */
33440, 15884, /* B=blk 15884 thru 49323 */
-1, 0, /* C=blk 0 thru end */
15884, 340670, /* D=blk 340670 thru 356553 */
55936, 356554, /* E=blk 356554 thru 412489 */
-1, 412490, /* F=blk 412490 thru end */
82080, 49324, /* G=blk 49324 thru 131403 */
-1, 131404, /* H=blk 131404 thru end */
};
/* END OF STUFF WHICH SHOULD BE READ IN PER DISK */
int udaerror = 0; /* causes hex dump of packets */
int udadebug = 0;
#define printd if (udadebug) printf
daddr_t radsize[NRA]; /* disk size, from ONLINE end packet */
int udprobe(), udslave(), udattach(), udintr();
struct mscp *udgetcp();
struct uba_ctlr *udminfo[NUDA];
struct uba_device *uddinfo[NRA];
struct uba_device *udip[NUDA][8]; /* 8 == max number of drives */
u_short udstd[] = { 0772150, 0772550, 0777550, 0 };
struct uba_driver udadriver =
{ udprobe, udslave, udattach, 0, udstd, "ra", uddinfo, "uda", udminfo, 0 };
struct buf rudbuf[NRA];
struct buf udutab[NRA];
struct buf udwtab[NUDA]; /* I/O wait queue, per controller */
#define b_qsize b_resid /* queue size per drive, in udutab */
#define b_ubinfo b_resid /* Unibus mapping info, per buffer */
udprobe(reg, ctlr)
caddr_t reg;
int ctlr;
{
register int br, cvec;
register struct uda_softc *sc = &uda_softc[ctlr];
#ifdef lint
br = 0; cvec = br; br = cvec; reg = reg;
udreset(0); udintr(0);
#endif
/* SHOULD CHECK THAT IT REALLY IS A UDA */
br = 0x15;
cvec = sc->sc_ivec = (uba_hd[numuba].uh_lastiv -= 4);
return(sizeof (struct udadevice));
}
udslave(ui, reg)
struct uba_device *ui;
caddr_t reg;
{
/*
* TOO HARD TO FIND OUT IF DISK IS THERE UNTIL
* INITIALIZED. WE'LL FIND OUT WHEN WE FIRST
* TRY TO ACCESS IT.
*/
#ifdef lint
ui = ui; reg = reg;
#endif
return(1);
}
udattach(ui)
register struct uba_device *ui;
{
if (ui->ui_dk >= 0)
dk_mspw[ui->ui_dk] = 1.0 / (60 * 31 * 256); /* approx */
ui->ui_flags = 0;
udip[ui->ui_ctlr][ui->ui_slave] = ui;
radsize[ui->ui_unit] = (daddr_t)0xffffff; /* max possible size */
}
/*
* Open a UDA. Initialize the device and
* set the unit online.
*/
udopen(dev, flag)
dev_t dev;
int flag;
{
register int unit;
register struct uba_device *ui;
register struct uda_softc *sc;
int s;
#ifdef lint
flag = flag;
#endif
unit = minor(dev) >> 3;
if (unit >= NRA || (ui = uddinfo[unit]) == 0 || ui->ui_alive == 0)
return (ENXIO);
sc = &uda_softc[ui->ui_ctlr];
s = spl5();
if (sc->sc_state != S_RUN) {
if (sc->sc_state == S_IDLE)
udinit(ui->ui_ctlr);
/* wait for initialization to complete */
sleep((caddr_t)ui->ui_mi, 0);
if (sc->sc_state != S_RUN)
return (EIO);
}
splx(s);
/* SHOULD PROBABLY FORCE AN ONLINE ATTEMPT
TO SEE IF DISK IS REALLY THERE */
return (0);
}
/*
* Initialize a UDA. Set up UBA mapping registers,
* initialize data structures, and start hardware
* initialization sequence.
*/
udinit(d)
int d;
{
register struct uda_softc *sc;
register struct uda *ud;
struct udadevice *udaddr;
struct uba_ctlr *um;
sc = &uda_softc[d];
um = udminfo[d];
um->um_tab.b_active++;
ud = &uda[d];
udaddr = (struct udadevice *)um->um_addr;
if (sc->sc_mapped == 0) {
/*
* Map the communications area and command
* and response packets into Unibus address
* space.
*/
sc->sc_ubainfo = uballoc(um->um_ubanum, (caddr_t)ud,
sizeof (struct uda), 0);
sc->sc_uda = (struct uda *)(sc->sc_ubainfo & 0x3ffff);
sc->sc_mapped = 1;
}
/*
* Start the hardware initialization sequence.
*/
udaddr->udaip = 0; /* start initialization */
while ((udaddr->udasa & UDA_STEP1) == 0)
;
udaddr->udasa = UDA_ERR|(NCMDL2<<11)|(NRSPL2<<8)|UDA_IE|(sc->sc_ivec/4);
/*
* Initialization continues in interrupt routine.
*/
sc->sc_state = S_STEP1;
sc->sc_credits = 0;
}
udstrategy(bp)
register struct buf *bp;
{
register struct uba_device *ui;
register struct uba_ctlr *um;
register struct buf *dp;
register int unit;
int xunit = minor(bp->b_dev) & 07;
daddr_t sz, maxsz;
int s;
sz = (bp->b_bcount+511) >> 9;
unit = dkunit(bp);
if (unit >= NRA)
goto bad;
ui = uddinfo[unit];
um = ui->ui_mi;
if (ui == 0 || ui->ui_alive == 0)
goto bad;
if ((maxsz = ra_sizes[xunit].nblocks) < 0)
maxsz = radsize[unit] - ra_sizes[xunit].blkoff;
if (bp->b_blkno < 0 || bp->b_blkno+sz > maxsz ||
ra_sizes[xunit].blkoff >= radsize[unit])
goto bad;
s = spl5();
/*
* Link the buffer onto the drive queue
*/
dp = &udutab[ui->ui_unit];
if (dp->b_actf == 0)
dp->b_actf = bp;
else
dp->b_actl->av_forw = bp;
dp->b_actl = bp;
bp->av_forw = 0;
/*
* Link the drive onto the controller queue
*/
if (dp->b_active == 0) {
dp->b_forw = NULL;
if (um->um_tab.b_actf == NULL)
um->um_tab.b_actf = dp;
else
um->um_tab.b_actl->b_forw = dp;
um->um_tab.b_actl = dp;
dp->b_active = 1;
}
if (um->um_tab.b_active == 0) {
#if defined(VAX750)
if (cpu == VAX_750
&& udwtab[um->um_ctlr].av_forw == &udwtab[um->um_ctlr]) {
if (um->um_ubinfo != 0)
printf("udastrat: ubinfo 0x%x\n",um->um_ubinfo);
else
um->um_ubinfo =
uballoc(um->um_ubanum, (caddr_t)0, 0,
UBA_NEEDBDP);
}
#endif
(void) udstart(um);
}
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
iodone(bp);
return;
}
udstart(um)
register struct uba_ctlr *um;
{
register struct buf *bp, *dp;
register struct mscp *mp;
register struct uda_softc *sc;
register struct uba_device *ui;
struct udadevice *udaddr;
int i;
sc = &uda_softc[um->um_ctlr];
loop:
if ((dp = um->um_tab.b_actf) == NULL) {
/*
* Release uneeded UBA resources and return
*/
um->um_tab.b_active = 0;
return (0);
}
if ((bp = dp->b_actf) == NULL) {
/*
* No more requests for this drive, remove
* from controller queue and look at next drive.
* We know we're at the head of the controller queue.
*/
dp->b_active = 0;
um->um_tab.b_actf = dp->b_forw;
goto loop;
}
um->um_tab.b_active++;
udaddr = (struct udadevice *)um->um_addr;
if ((udaddr->udasa&UDA_ERR) || sc->sc_state != S_RUN) {
harderr(bp, "ra");
printf("udasa %o, state %d\n", udaddr->udasa&0xffff, sc->sc_state);
udinit(um->um_ctlr);
/* SHOULD REQUEUE OUTSTANDING REQUESTS, LIKE UDRESET */
return (0);
}
ui = uddinfo[dkunit(bp)];
/*
* If no credits, can't issue any commands
* until some outstanding commands complete.
*/
if (sc->sc_credits < 2)
return (0);
if ((mp = udgetcp(um)) == NULL)
return (0);
sc->sc_credits--; /* committed to issuing a command */
if (ui->ui_flags == 0) { /* not online */
mp->mscp_opcode = M_OP_ONLIN;
mp->mscp_unit = ui->ui_slave;
dp->b_active = 2;
um->um_tab.b_actf = dp->b_forw; /* remove from controller q */
printd("uda: bring unit %d online\n", ui->ui_slave);
*((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT;
i = udaddr->udaip;
goto loop;
}
switch (cpu) {
case VAX_780:
i = UBA_NEEDBDP|UBA_CANTWAIT;
break;
case VAX_750:
i = um->um_ubinfo|UBA_HAVEBDP|UBA_CANTWAIT;
break;
case VAX_730:
i = UBA_CANTWAIT;
break;
}
if ((i = ubasetup(um->um_ubanum, bp, i)) == 0) {
mp->mscp_opcode = M_OP_GTUNT;
mp->mscp_unit = ui->ui_slave;
*((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT;
i = udaddr->udaip; /* initiate polling */
return(1); /* wait for interrupt */
}
mp->mscp_cmdref = (long)bp; /* pointer to get back */
mp->mscp_opcode = bp->b_flags&B_READ ? M_OP_READ : M_OP_WRITE;
mp->mscp_unit = ui->ui_slave;
mp->mscp_lbn = bp->b_blkno + ra_sizes[minor(bp->b_dev)&7].blkoff;
mp->mscp_bytecnt = bp->b_bcount;
mp->mscp_buffer = (i & 0x3ffff) | (((i>>28)&0xf)<<24);
#if defined(VAX750)
if (cpu == VAX_750)
i &= 0xfffffff; /* mask off bdp */
#endif
bp->b_ubinfo = i; /* save mapping info */
*((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT;
i = udaddr->udaip; /* initiate polling */
if (ui->ui_dk >= 0) {
dk_busy |= 1<<ui->ui_dk;
dp->b_qsize++;
dk_xfer[ui->ui_dk]++;
dk_wds[ui->ui_dk] += bp->b_bcount>>6;
}
/*
* Move drive to the end of the controller queue
*/
if (dp->b_forw != NULL) {
um->um_tab.b_actf = dp->b_forw;
um->um_tab.b_actl->b_forw = dp;
um->um_tab.b_actl = dp;
dp->b_forw = NULL;
}
/*
* Move buffer to I/O wait queue
*/
dp->b_actf = bp->av_forw;
dp = &udwtab[um->um_ctlr];
bp->av_forw = dp;
bp->av_back = dp->av_back;
dp->av_back->av_forw = bp;
dp->av_back = bp;
goto loop;
}
/*
* UDA interrupt routine.
*/
udintr(d)
int d;
{
register struct uba_ctlr *um = udminfo[d];
register struct udadevice *udaddr = (struct udadevice *)um->um_addr;
struct buf *bp;
register int i;
register struct uda_softc *sc = &uda_softc[d];
register struct uda *ud = &uda[d];
struct uda *uud;
struct mscp *mp;
printd("udintr: state %d, udasa %o\n", sc->sc_state, udaddr->udasa);
switch (sc->sc_state) {
case S_IDLE:
printf("uda%d: random interrupt ignored\n", d);
return;
case S_STEP1:
#define STEP1MASK 0174377
#define STEP1GOOD (UDA_STEP2|UDA_IE|(NCMDL2<<3)|NRSPL2)
if ((udaddr->udasa&STEP1MASK) != STEP1GOOD) {
sc->sc_state = S_IDLE;
wakeup((caddr_t)um);
return;
}
udaddr->udasa = ((int)&sc->sc_uda->uda_ca.ca_ringbase)|
(cpu == VAX_780 ? UDA_PI : 0);
sc->sc_state = S_STEP2;
return;
case S_STEP2:
#define STEP2MASK 0174377
#define STEP2GOOD (UDA_STEP3|UDA_IE|(sc->sc_ivec/4))
if ((udaddr->udasa&STEP2MASK) != STEP2GOOD) {
sc->sc_state = S_IDLE;
wakeup((caddr_t)um);
return;
}
udaddr->udasa = ((int)&sc->sc_uda->uda_ca.ca_ringbase)>>16;
sc->sc_state = S_STEP3;
return;
case S_STEP3:
#define STEP3MASK 0174000
#define STEP3GOOD UDA_STEP4
if ((udaddr->udasa&STEP3MASK) != STEP3GOOD) {
sc->sc_state = S_IDLE;
wakeup((caddr_t)um);
return;
}
udaddr->udasa = UDA_GO;
sc->sc_state = S_SCHAR;
/*
* Initialize the data structures.
*/
uud = sc->sc_uda;
for (i = 0; i < NRSP; i++) {
ud->uda_ca.ca_rspdsc[i] = UDA_OWN|UDA_INT|
(long)&uud->uda_rsp[i].mscp_cmdref;
ud->uda_rsp[i].mscp_dscptr = &ud->uda_ca.ca_rspdsc[i];
ud->uda_rsp[i].mscp_header.uda_msglen = sizeof (struct mscp);
}
for (i = 0; i < NCMD; i++) {
ud->uda_ca.ca_cmddsc[i] = UDA_INT|
(long)&uud->uda_cmd[i].mscp_cmdref;
ud->uda_cmd[i].mscp_dscptr = &ud->uda_ca.ca_cmddsc[i];
ud->uda_cmd[i].mscp_header.uda_msglen = sizeof (struct mscp);
}
bp = &udwtab[d];
bp->av_forw = bp->av_back = bp;
sc->sc_lastcmd = 0;
sc->sc_lastrsp = 0;
if ((mp = udgetcp(um)) == NULL) {
sc->sc_state = S_IDLE;
wakeup((caddr_t)um);
return;
}
mp->mscp_opcode = M_OP_STCON;
mp->mscp_cntflgs = M_CF_ATTN|M_CF_MISC|M_CF_THIS;
*((long *)mp->mscp_dscptr) |= UDA_OWN|UDA_INT;
i = udaddr->udaip; /* initiate polling */
return;
case S_SCHAR:
case S_RUN:
break;
default:
printf("uda%d: interrupt in unknown state %d ignored\n",
d, sc->sc_state);
return;
}
if (udaddr->udasa&UDA_ERR) {
printf("uda%d: fatal error (%o)\n", d, udaddr->udasa&0xffff);
udaddr->udaip = 0;
wakeup((caddr_t)um);
}
/*
* Check for a buffer purge request.
*/
if (ud->uda_ca.ca_bdp) {
/*
* THIS IS A KLUDGE.
* Maybe we should change the entire
* UBA interface structure.
*/
int s = spl7();
i = um->um_ubinfo;
printd("uda: purge bdp %d\n", ud->uda_ca.ca_bdp);
um->um_ubinfo = ud->uda_ca.ca_bdp<<28;
ubapurge(um);
um->um_ubinfo = i;
(void) splx(s);
ud->uda_ca.ca_bdp = 0;
udaddr->udasa = 0; /* signal purge complete */
}
/*
* Check for response ring transition.
*/
if (ud->uda_ca.ca_rspint) {
ud->uda_ca.ca_rspint = 0;
for (i = sc->sc_lastrsp;; i++) {
i %= NRSP;
if (ud->uda_ca.ca_rspdsc[i]&UDA_OWN)
break;
udrsp(um, ud, sc, i);
ud->uda_ca.ca_rspdsc[i] |= UDA_OWN;
}
sc->sc_lastrsp = i;
}
/*
* Check for command ring transition.
*/
if (ud->uda_ca.ca_cmdint) {
printd("uda: command ring transition\n");
ud->uda_ca.ca_cmdint = 0;
}
(void) udstart(um);
}
/*
* Process a response packet
*/
udrsp(um, ud, sc, i)
register struct uba_ctlr *um;
register struct uda *ud;
register struct uda_softc *sc;
int i;
{
register struct mscp *mp;
struct uba_device *ui;
struct buf *dp, *bp;
int st;
mp = &ud->uda_rsp[i];
mp->mscp_header.uda_msglen = sizeof (struct mscp);
sc->sc_credits += mp->mscp_header.uda_credits & 0xf;
if ((mp->mscp_header.uda_credits & 0xf0) > 0x10)
return;
/*
* If it's an error log message (datagram),
* pass it on for more extensive processing.
*/
if ((mp->mscp_header.uda_credits & 0xf0) == 0x10) {
uderror(um, (struct mslg *)mp);
return;
}
if (mp->mscp_unit >= 8)
return;
if ((ui = udip[um->um_ctlr][mp->mscp_unit]) == 0)
return;
st = mp->mscp_status&M_ST_MASK;
switch (mp->mscp_opcode) {
case M_OP_STCON|M_OP_END:
if (st == M_ST_SUCC)
sc->sc_state = S_RUN;
else
sc->sc_state = S_IDLE;
um->um_tab.b_active = 0;
wakeup((caddr_t)um);
break;
case M_OP_ONLIN|M_OP_END:
/*
* Link the drive onto the controller queue
*/
dp = &udutab[ui->ui_unit];
dp->b_forw = NULL;
if (um->um_tab.b_actf == NULL)
um->um_tab.b_actf = dp;
else
um->um_tab.b_actl->b_forw = dp;
um->um_tab.b_actl = dp;
if (st == M_ST_SUCC) {
ui->ui_flags = 1; /* mark it online */
radsize[ui->ui_unit] = (daddr_t)mp->mscp_untsize;
printd("uda: unit %d online\n", mp->mscp_unit);
#ifdef notdef
printf("uda%d: online, size=%d\n",
mp->mscp_unit, (daddr_t)mp->mscp_untsize);
#endif
} else {
harderr(dp->b_actf, "ra");
printf("OFFLINE\n");
while (bp = dp->b_actf) {
dp->b_actf = bp->av_forw;
bp->b_flags |= B_ERROR;
iodone(bp);
}
}
dp->b_active = 1;
break;
case M_OP_AVATN:
printd("uda: unit %d attention\n", mp->mscp_unit);
ui->ui_flags = 0; /* it went offline and we didn't notice */
break;
case M_OP_READ|M_OP_END:
case M_OP_WRITE|M_OP_END:
bp = (struct buf *)mp->mscp_cmdref;
ubarelse(um->um_ubanum, (int *)&bp->b_ubinfo);
/*
* Unlink buffer from I/O wait queue.
*/
bp->av_back->av_forw = bp->av_forw;
bp->av_forw->av_back = bp->av_back;
#if defined(VAX750)
if (cpu == VAX_750
&& udwtab[um->um_ctlr].av_forw == &udwtab[um->um_ctlr]) {
if (um->um_ubinfo == 0)
printf("udintr: um_ubinfo == 0\n");
else
ubarelse(um->um_ubanum, &um->um_ubinfo);
}
#endif
dp = &udutab[ui->ui_unit];
if (ui->ui_dk >= 0)
if (--dp->b_qsize == 0)
dk_busy &= ~(1<<ui->ui_dk);
if (st == M_ST_OFFLN || st == M_ST_AVLBL) {
ui->ui_flags = 0; /* mark unit offline */
/*
* Link the buffer onto the front of the drive queue
*/
if ((bp->av_forw = dp->b_actf) == 0)
dp->b_actl = bp;
dp->b_actf = bp;
/*
* Link the drive onto the controller queue
*/
if (dp->b_active == 0) {
dp->b_forw = NULL;
if (um->um_tab.b_actf == NULL)
um->um_tab.b_actf = dp;
else
um->um_tab.b_actl->b_forw = dp;
um->um_tab.b_actl = dp;
dp->b_active = 1;
}
#if defined(VAX750)
if (cpu == VAX750 && um->um_ubinfo == 0)
um->um_ubinfo =
uballoc(um->um_ubanum, (caddr_t)0, 0,
UBA_NEEDBDP);
#endif
return;
}
if (st != M_ST_SUCC) {
harderr(bp, "ra");
printf("status %o\n", mp->mscp_status);
bp->b_flags |= B_ERROR;
}
bp->b_resid = bp->b_bcount - mp->mscp_bytecnt;
iodone(bp);
break;
case M_OP_GTUNT|M_OP_END:
break;
default:
printf("uda: unknown packet\n");
}
}
/*
* Process an error log message
*
* For now, just log the error on the console.
* Only minimal decoding is done, only "useful"
* information is printed. Eventually should
* send message to an error logger.
*/
uderror(um, mp)
register struct uba_ctlr *um;
register struct mslg *mp;
{
printf("uda%d: %s error, ", um->um_ctlr,
mp->mslg_flags&M_LF_SUCC ? "soft" : "hard");
switch (mp->mslg_format) {
case M_FM_CNTERR:
printf("controller error, event 0%o\n", mp->mslg_event);
break;
case M_FM_BUSADDR:
printf("host memory access error, event 0%o, addr 0%o\n",
mp->mslg_event, mp->mslg_busaddr);
break;
case M_FM_DISKTRN:
printf("disk transfer error, unit %d, grp 0x%x, hdr 0x%x\n",
mp->mslg_unit, mp->mslg_group, mp->mslg_hdr);
break;
case M_FM_SDI:
printf("SDI error, unit %d, event 0%o, hdr 0x%x\n",
mp->mslg_unit, mp->mslg_event, mp->mslg_hdr);
break;
case M_FM_SMLDSK:
printf("small disk error, unit %d, event 0%o, cyl %d\n",
mp->mslg_unit, mp->mslg_event, mp->mslg_sdecyl);
break;
default:
printf("unknown error, unit %d, format 0%o, event 0%o\n",
mp->mslg_unit, mp->mslg_format, mp->mslg_event);
}
if (udaerror) {
register long *p = (long *)mp;
register int i;
for (i = 0; i < mp->mslg_header.uda_msglen; i += sizeof(*p))
printf("%x ", *p++);
printf("\n");
}
}
/*
* Find an unused command packet
*/
struct mscp *
udgetcp(um)
struct uba_ctlr *um;
{
register struct mscp *mp;
register struct udaca *cp;
register struct uda_softc *sc;
register int i;
cp = &uda[um->um_ctlr].uda_ca;
sc = &uda_softc[um->um_ctlr];
i = sc->sc_lastcmd;
if ((cp->ca_cmddsc[i] & (UDA_OWN|UDA_INT)) == UDA_INT) {
cp->ca_cmddsc[i] &= ~UDA_INT;
mp = &uda[um->um_ctlr].uda_cmd[i];
mp->mscp_unit = mp->mscp_modifier = 0;
mp->mscp_opcode = mp->mscp_flags = 0;
mp->mscp_bytecnt = mp->mscp_buffer = 0;
mp->mscp_errlgfl = mp->mscp_copyspd = 0;
sc->sc_lastcmd = (i + 1) % NCMD;
return(mp);
}
return(NULL);
}
udread(dev, uio)
dev_t dev;
struct uio *uio;
{
register int unit = minor(dev) >> 3;
if (unit >= NRA)
return (ENXIO);
return (physio(udstrategy, &rudbuf[unit], dev, B_READ, minphys, uio));
}
udwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
register int unit = minor(dev) >> 3;
if (unit >= NRA)
return (ENXIO);
return (physio(udstrategy, &rudbuf[unit], dev, B_WRITE, minphys, uio));
}
udreset(uban)
int uban;
{
register struct uba_ctlr *um;
register struct uba_device *ui;
register struct buf *bp, *dp;
register int unit;
struct buf *nbp;
int d;
for (d = 0; d < NUDA; d++) {
if ((um = udminfo[d]) == 0 || um->um_ubanum != uban ||
um->um_alive == 0)
continue;
printf(" uda%d", d);
um->um_tab.b_active = 0;
um->um_tab.b_actf = um->um_tab.b_actl = 0;
uda_softc[d].sc_state = S_IDLE;
for (unit = 0; unit < NRA; unit++) {
if ((ui = uddinfo[unit]) == 0)
continue;
if (ui->ui_alive == 0 || ui->ui_mi != um)
continue;
udutab[unit].b_active = 0;
udutab[unit].b_qsize = 0;
}
for (bp = udwtab[d].av_forw; bp != &udwtab[d]; bp = nbp) {
nbp = bp->av_forw;
bp->b_ubinfo = 0;
/*
* Link the buffer onto the drive queue
*/
dp = &udutab[dkunit(bp)];
if (dp->b_actf == 0)
dp->b_actf = bp;
else
dp->b_actl->av_forw = bp;
dp->b_actl = bp;
bp->av_forw = 0;
/*
* Link the drive onto the controller queue
*/
if (dp->b_active == 0) {
dp->b_forw = NULL;
if (um->um_tab.b_actf == NULL)
um->um_tab.b_actf = dp;
else
um->um_tab.b_actl->b_forw = dp;
um->um_tab.b_actl = dp;
dp->b_active = 1;
}
}
udinit(d);
}
}
uddump()
{
return(ENXIO);
}
udsize(dev)
dev_t dev;
{
int unit = minor(dev) >> 3;
struct uba_device *ui;
if (unit >= NRA || (ui = uddinfo[unit]) == 0 || ui->ui_alive == 0)
return (-1);
return (ra_sizes[minor(dev) & 07].nblocks); /* XXX */
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.