[unix-history] / usr / src / sys / tahoe / vba / ik.c

/*	ik.c	1.3	86/12/11	*/

#include "ik.h"
#if NIK > 0
/*
 * PS300/IKON DR-11W Device Driver.
 */
#include "param.h"
#include "buf.h"
#include "cmap.h"
#include "conf.h"
#include "dir.h"
#include "dkstat.h"
#include "map.h"
#include "systm.h"
#include "user.h"
#include "vmmac.h"
#include "proc.h"
#include "uio.h"
#include "kernel.h"
#include "syslog.h"

#include "../tahoe/mtpr.h"
#include "../tahoe/pte.h"

#include "../tahoevba/vbavar.h"
#include "../tahoevba/ikreg.h"
#include "../tahoevba/psreg.h"
#include "../tahoevba/psproto.h"

int	ikprobe(), ikattach(), iktimer();
struct	vba_device *ikinfo[NIK];
long	ikstd[] = { 0 };
struct	vba_driver ikdriver = { ikprobe, 0, ikattach, 0, ikstd, "ik", ikinfo };

#define splik()		spl4()
/*
 * Devices are organized in pairs with the odd valued
 * device being used for ``diagnostic'' purposes.  That
 * is diagnostic devices don't get auto-attach'd and
 * detach'd on open-close.
 */
#define IKUNIT(dev)	(minor(dev) >> 1)
#define IKDIAG(dev)	(minor(dev) & 01)	/* is a diagnostic unit */

struct	ik_softc {
	uid_t	is_uid;		/* uid of open processes */
	u_short is_timeout;	/* current timeout (seconds) */
	u_short is_error;	/* internal error codes */
	u_short is_flags;
#define IKF_ATTACHED	0x1	/* unit is attached (not used yet) */
	union {
		u_short w[2];
		u_long	l;
	} is_nameaddr;		/* address of last symbol lookup */
	caddr_t is_buf;		/* i/o buffer XXX */
} ik_softc[NIK];

struct	buf iktab[NIK];		/* unit command queue headers */
struct	buf rikbuf[NIK];	/* buffers for read/write operations */
struct	buf cikbuf[NIK];	/* buffers for control operations */

/* buf overlay definitions */
#define b_command	b_resid

int	ikdiotimo = PS_DIOTIMO; /* dio polling timeout */
int	iktimeout = PS_TIMEOUT; /* attention/dma timeout (in hz) */

ikprobe(reg, vi)
	caddr_t reg;
	struct vba_device *vi;
{
	register int br, cvec;		/* r12, r11 */
	register struct ikdevice *ik;

	if (badaddr(reg, 2))
		return (0);
	ik = (struct ikdevice *)reg;
	ik->ik_vec = --vi->ui_hd->vh_lastiv;
	/*
	 * Use extended non-privileged address modifier to
	 * insure DMA to/from intermediate buffer works when
	 * buffer is not in lower 16Mb of memory (also avoids
	 * other 24-bit devices mapped into overlapping regions).
	 */
	ik->ik_mod = 0xf1;			/* address modifier */
	/*
	 * Try and reset the PS300.  Since this
	 * won't work if it's powered off, we
	 * can't use sucess/failure to decide
	 * if the device is present.
	 */
	br = 0;
	(void) psreset(ik, IKCSR_IENA);
	if (br == 0)				/* XXX */
		br = 0x18, cvec = ik->ik_vec;	/* XXX */
	return (sizeof (struct ikdevice));
}

/*
 * Perform a ``hard'' reset.
 */
psreset(ik, iena)
	register struct ikdevice *ik;
{

	ik->ik_csr = IKCSR_MCLR|iena;
	DELAY(10000);
	ik->ik_csr = IKCSR_FNC3|iena;
	if (!iena)
		return (dioread(ik) == PS_RESET);
	return (1);
}

ikattach(vi)
	struct vba_device *vi;
{

	ik_softc[vi->ui_unit].is_uid = -1;
}

/*
 * Open a PS300 and attach.  We allow multiple
 * processes with the same uid to share a unit.
 */
/*ARGSUSED*/
ikopen(dev, flag)
	dev_t dev;
	int flag;
{
	register int unit = IKUNIT(dev);
	register struct ik_softc *sc;
	struct vba_device *vi;
	struct ikdevice *ik;
	int reset;

	if (unit >= NIK || (vi = ikinfo[unit]) == 0 || vi->ui_alive == 0)
		return (ENXIO);
	sc = &ik_softc[unit];
	if (sc->is_uid != -1 && sc->is_uid != u.u_uid)
		return (EBUSY);
	if (sc->is_uid == -1) {
		sc->is_buf = (caddr_t)wmemall(vmemall, PS_MAXDMA);
		if (sc->is_buf == 0)
			return (ENOMEM);
		sc->is_timeout = 0;
		timeout(iktimer, unit, hz);
		/*
		 * Perform PS300 attach for first process.
		 */
		if (!IKDIAG(dev)) {
			reset = 0;
		again:
			if (ikcommand(dev, PS_ATTACH, 1)) {
				/*
				 * If attach fails, perform a hard
				 * reset once, then retry the command.
				 */
				ik = (struct ikdevice *)ikinfo[unit]->ui_addr;
				if (!reset++ && psreset(ik, 0))
					goto again;
				untimeout(iktimer, unit);
				wmemfree(sc->is_buf, PS_MAXDMA);
				sc->is_buf = 0;
				return (EIO);
			}
		}
		sc->is_uid = u.u_uid;
	}
	return (0);
}

/*ARGSUSED*/
ikclose(dev, flag)
	dev_t dev;
	int flag;
{
	int unit = IKUNIT(dev);
	register struct ik_softc *sc = &ik_softc[unit];

	if (!IKDIAG(dev))
		(void) ikcommand(dev, PS_DETACH, 1);	/* auto detach */
	sc->is_uid = -1;
	if (sc->is_buf) {
		wmemfree(sc->is_buf, PS_MAXDMA);
		sc->is_buf = 0;
	}
	untimeout(iktimer, unit);
}

ikread(dev, uio)
	dev_t dev;
	struct uio *uio;
{

	return (ikrw(dev, uio, B_READ));
}

ikwrite(dev, uio)
	dev_t dev;
	struct uio *uio;
{

	return (ikrw(dev, uio, B_WRITE));
}

/*
 * Take read/write request and perform physical i/o
 * transaction with PS300.  This involves constructing
 * a physical i/o request vector based on the uio
 * vector, performing the dma, and, finally, moving
 * the data to it's final destination (because of CCI
 * VERSAbus bogosities).
 */
ikrw(dev, uio, rw)
	dev_t dev;
	register struct uio *uio;
	int rw;
{
	int error, unit = IKUNIT(dev), s, wrcmd;
	register struct buf *bp;
	register struct iovec *iov;
	register struct psalist *ap;
	struct ik_softc *sc = &ik_softc[unit];

	if (unit >= NIK)
		return (ENXIO);
	bp = &rikbuf[unit];
	error = 0, iov = uio->uio_iov, wrcmd = PS_WRPHY;
	for (; !error && uio->uio_iovcnt; iov++, uio->uio_iovcnt--) { 
		/*
		 * Hack way to set PS300 address w/o doing an lseek
		 * and specify write physical w/ refresh synchronization.
		 */
		if (iov->iov_len == 0) {
			if ((int)iov->iov_base&PSIO_SYNC)
				wrcmd = PS_WRPHY_SYNC;
			uio->uio_offset = (int)iov->iov_base & ~PSIO_SYNC;
			continue;
		}
		if (iov->iov_len > PS_MAXDMA) {
			sc->is_error = PSERROR_INVALBC, error = EINVAL;
			continue;
		}
		if ((int)uio->uio_offset&01) {
			sc->is_error = PSERROR_BADADDR, error = EINVAL;
			continue;
		}
		s = splbio();
		while (bp->b_flags&B_BUSY) {
			bp->b_flags |= B_WANTED;
			sleep((caddr_t)bp, PRIBIO+1);
		}
		splx(s);
		bp->b_flags = B_BUSY | rw;
		/*
		 * Construct address descriptor in buffer.
		 */
		ap = (struct psalist *)sc->is_buf;
		ap->nblocks = 1;
		/* work-around dr300 word swapping */
		ap->addr[0] = uio->uio_offset & 0xffff;
		ap->addr[1] = uio->uio_offset >> 16;
		ap->wc = (iov->iov_len + 1) >> 1;
		if (rw == B_WRITE) {
			error = copyin(iov->iov_base, (caddr_t)&ap[1],
			    iov->iov_len);
			if (!error)
				error = ikcommand(dev, wrcmd,
				    iov->iov_len + sizeof (*ap));
		} else {
			caddr_t cp;
			int len;

			error = ikcommand(dev, PS_RDPHY, sizeof (*ap));
			cp = (caddr_t)&ap[1], len = iov->iov_len;
			for (; len > 0; len -= NBPG, cp += NBPG)
				mtpr(P1DC, cp);
			if (!error)
				error = copyout((caddr_t)&ap[1], iov->iov_base,
				    iov->iov_len);
		}
		(void) splbio();
		if (bp->b_flags&B_WANTED)
			wakeup((caddr_t)bp);
		splx(s);
		uio->uio_resid -= iov->iov_len;
		uio->uio_offset += iov->iov_len;
		bp->b_flags &= ~(B_BUSY|B_WANTED);
	}
	return (error);
}

/*
 * Perform a PS300 command.
 */
ikcommand(dev, com, count)
	dev_t dev;
	int com, count;
{
	register struct buf *bp;
	register int s;

	bp = &cikbuf[IKUNIT(dev)];
	s = splik();
	while (bp->b_flags&B_BUSY) {
		if (bp->b_flags&B_DONE)
			break;
		bp->b_flags |= B_WANTED;
		sleep((caddr_t)bp, PRIBIO);
	}
	bp->b_flags = B_BUSY|B_READ;
	splx(s);
	bp->b_dev = dev;
	bp->b_command = com;
	bp->b_bcount = count;
	ikstrategy(bp);
	biowait(bp);
	if (bp->b_flags&B_WANTED)
		wakeup((caddr_t)bp);
	bp->b_flags &= B_ERROR;
	return (geterror(bp));
}

/*
 * Physio strategy routine
 */
ikstrategy(bp)
	register struct buf *bp;
{
	register struct buf *dp;

	/*
	 * Put request at end of controller queue.
	 */
	dp = &iktab[IKUNIT(bp->b_dev)];
	bp->av_forw = NULL;
	(void) splik();
	if (dp->b_actf != NULL) {
		dp->b_actl->av_forw = bp;
		dp->b_actl = bp;
	} else
		dp->b_actf = dp->b_actl = bp;
	if (!dp->b_active)
		ikstart(dp);
	(void) spl0();
}

/*
 * Start the next command on the controller's queue.
 */
ikstart(dp)
	register struct buf *dp;
{
	register struct buf *bp;
	register struct ikdevice *ik;
	register struct ik_softc *sc;
	register struct psalist *ap;
	u_short bc, csr;
	u_int addr;
	int unit;

loop:
	/*
	 * Pull a request off the controller queue
	 */
	if ((bp = dp->b_actf) == NULL) {
		dp->b_active = 0;
		return;
	}
	/*
	 * Mark controller busy and process this request.
	 */
	dp->b_active = 1;
	unit = IKUNIT(bp->b_dev);
	sc = &ik_softc[unit];
	ik = (struct ikdevice *)ikinfo[unit]->ui_addr;
	switch (bp->b_command) {

	case PS_ATTACH:		/* logical unit attach */
	case PS_DETACH:		/* logical unit detach */
	case PS_LOOKUP:		/* name lookup */
	case PS_RDPHY:		/* physical i/o read */
	case PS_WRPHY:		/* physical i/o write */
	case PS_WRPHY_SYNC:	/* physical i/o write w/ sync */
		/*
		 * Handshake command and, optionally,
		 * byte count and byte swap flag.
		 */
		if (sc->is_error = diowrite(ik, bp->b_command))
			goto bad;
		if (bp->b_command < PS_DETACH) {
			if (sc->is_error = diowrite(ik, bp->b_bcount))
				goto bad;
			if (sc->is_error = diowrite(ik, 0 /* !swab */))
				goto bad;
		}
		/*
		 * Set timeout and wait for an attention interrupt.
		 */
		sc->is_timeout = iktimeout;
		return;

	case PS_DMAOUT:		/* dma data host->PS300 */
		bc = bp->b_bcount;
		csr = IKCSR_CYCLE;
		break;

	case PS_DMAIN:		/* dma data PS300->host */
		bc = bp->b_bcount;
		csr = IKCSR_CYCLE|IKCSR_FNC1;
		break;

	default:
		log(LOG_ERR, "ik%d: bad cmd %x\n", unit, bp->b_command);
		sc->is_error = PSERROR_BADCMD;
		goto bad;
	}
	/* initiate dma transfer */
	addr = vtoph((struct proc *)0, sc->is_buf);
	ik->ik_bahi = addr >> 17;
	ik->ik_balo = (addr >> 1) & 0xffff;
	ik->ik_wc = ((bc + 1) >> 1) - 1;	/* round & convert */
	ik->ik_pulse = IKPULSE_RATTF|IKPULSE_RDMAF;
	sc->is_timeout = iktimeout;
	ik->ik_csr = IKCSR_IENA|IKCSR_GO|csr;
	return;
bad:
	bp->b_flags |= B_ERROR;
	dp->b_actf = bp->av_forw;		/* remove from queue */
	biodone(bp);
	goto loop;
}

#define FETCHWORD(i) { \
	int v; \
\
	v = dioread(ik); \
	if (v == -1) { \
		sc->is_error = PSERROR_NAMETIMO; \
		goto bad; \
	} \
	sc->is_nameaddr.w[i] = v; \
}

/*
 * Process a device interrupt.
 */
ikintr(ikon)
	int ikon;
{
	register struct ikdevice *ik;
	register struct buf *bp, *dp;
	struct ik_softc *sc;
	register u_short data;
	u_short i, v;

	/* should go by controller, but for now... */
	if (ikinfo[ikon] == 0)
		return;
	ik = (struct ikdevice *)ikinfo[ikon]->ui_addr;
	/*
	 * Discard all non-attention interrupts.  The
	 * interrupts we're throwing away should all be
	 * associated with DMA completion.
	 */
	data = ik->ik_data;
	if ((ik->ik_csr&(IKCSR_ATTF|IKCSR_STATC)) != IKCSR_ATTF) {
		ik->ik_pulse = IKPULSE_RATTF|IKPULSE_RDMAF|IKPULSE_SIENA;
		return;
	}
	/*
	 * Fetch attention code immediately.
	 */
	ik->ik_csr = IKCSR_RATTF|IKCSR_RDMAF|IKCSR_FNC1;
	ik->ik_pulse = IKPULSE_FNC2;
	/*
	 * Get device and block structures, and a pointer
	 * to the vba_device for the device.  We receive an
	 * unsolicited interrupt whenever the PS300 is power
	 * cycled (so ignore it in that case).
	 */
	dp = &iktab[ikon];
	if ((bp = dp->b_actf) == NULL) {
		if (PS_CODE(data) != PS_RESET)		/* power failure */
			log(LOG_WARNING, "ik%d: spurious interrupt, code %x\n",
			    ikon, data);
		goto enable;
	}
	sc = &ik_softc[IKUNIT(bp->b_dev)];
	sc->is_timeout = 0;			/* disable timer */
	switch (PS_CODE(data)) {

	case PS_LOOKUP:				/* name lookup */
		if (data == PS_LOOKUP) {	/* dma name */
			bp->b_command = PS_DMAOUT;
			goto opcont;
		}
		if (data == PS_DMAOK(PS_LOOKUP)) {
			/* reenable interrupt and wait for address */
			sc->is_timeout = iktimeout;
			goto enable;
		}
		/*
		 * Address should be present, extract it one
		 * word at a time from the PS300 (yech).
		 */
		if (data != PS_ADROK(PS_LOOKUP))
			goto bad;
		FETCHWORD(0);
		FETCHWORD(1);
		goto opdone;

	case PS_WRPHY_SYNC:			/* physical i/o write w/ sync */
		if (data == PS_WRPHY_SYNC) {	/* start dma transfer */
			bp->b_command = PS_DMAOUT;
			goto opcont;
		}
		if (data != PS_DMAOK(PS_WRPHY_SYNC))
			goto bad;
		goto opdone;

	case PS_WRPHY:				/* physical i/o write */
		if (data == PS_WRPHY) { /* start dma transfer */
			bp->b_command = PS_DMAOUT;
			goto opcont;
		}
		if (data != PS_DMAOK(PS_WRPHY))
			goto bad;
		goto opdone;

	case PS_ATTACH:				/* attach unit */
	case PS_DETACH:				/* detach unit */
	case PS_ABORT:				/* abort code from ps300 */
		if (data != bp->b_command)
			goto bad;
		goto opdone;

	case PS_RDPHY:				/* physical i/o read */
		if (data == PS_RDPHY) {		/* dma address list */
			bp->b_command = PS_DMAOUT;
			goto opcont;
		}
		if (data == PS_ADROK(PS_RDPHY)) {
			/* collect read byte count and start dma */
			bp->b_bcount = dioread(ik);
			if (bp->b_bcount == -1)
				goto bad;
			bp->b_command = PS_DMAIN;
			goto opcont;
		}
		if (data == PS_DMAOK(PS_RDPHY))
			goto opdone;
		goto bad;
	}
bad:
	sc->is_error = data;
	bp->b_flags |= B_ERROR;
opdone:
	dp->b_actf = bp->av_forw;		/* remove from queue */
	biodone(bp);
opcont:
	ikstart(dp);
enable:
	ik->ik_pulse = IKPULSE_SIENA;		/* explicitly reenable */
}

/*
 * Watchdog timer.
 */
iktimer(unit)
	int unit;
{
	register struct ik_softc *sc = &ik_softc[unit];

	if (sc->is_timeout && --sc->is_timeout == 0) {
		register struct buf *dp, *bp;
		int s;

		log(LOG_ERR, "ik%d: timeout\n", unit);
		s = splik();
		/* should abort current command */
		dp = &iktab[unit];
		if (bp = dp->b_actf) {
			sc->is_error = PSERROR_CMDTIMO;
			bp->b_flags |= B_ERROR;
			dp->b_actf = bp->av_forw;	/* remove from queue */
			biodone(bp);
			ikstart(dp);
		}
		splx(s);
	}
	timeout(iktimer, unit, hz);
}

/*
 * Handshake read from DR300.
 */
dioread(ik)
	register struct ikdevice *ik;
{
	register int timeout;
	u_short data;

	for (timeout = ikdiotimo; timeout > 0; timeout--)
		if ((ik->ik_csr&(IKCSR_ATTF|IKCSR_STATC)) == IKCSR_ATTF) {
			data = ik->ik_data;
			ik->ik_csr = IKCSR_RATTF|IKCSR_RDMAF|IKCSR_FNC1;
			ik->ik_pulse = IKPULSE_FNC2;
			return (data);
		}
	return (-1);
}

/*
 * Handshake write to DR300. 
 *
 * Interrupts are enabled before completing the work
 * so the caller should either be at splik or be
 * prepared to take the interrupt immediately.
 */
diowrite(ik, v)
	register struct ikdevice *ik;
	u_short v;
{
	register int timeout;
	register u_short csr;

top:
	/*
	 * Deposit data and generate dr300 attention
	 */
	ik->ik_data = v;
	ik->ik_csr = IKCSR_RDMAF|IKCSR_RATTF;
	ik->ik_pulse = IKPULSE_FNC2;
	for (timeout = ikdiotimo; timeout > 0; timeout--) {
		csr = ik->ik_csr;
#define IKCSR_DONE	(IKCSR_STATA|IKCSR_STATC)
		if ((csr&IKCSR_DONE) == IKCSR_DONE) {
			/* 
			 * Done, complete handshake by notifying dr300.
			 */
			ik->ik_csr = IKCSR_IENA;	/* ~IKCSR_FNC1 */
			ik->ik_pulse = IKPULSE_FNC2;
			return (0);
		}
		/* beware of potential deadlock with dioread */
		if ((csr&(IKCSR_ATTF|IKCSR_STATC)) == IKCSR_ATTF)
			goto top;
	}
	ik->ik_csr = IKCSR_IENA;
	return (PSERROR_DIOTIMO);
}

/*ARGSUSED*/
ikioctl(dev, cmd, data, flag)
	dev_t dev;
	int cmd;
	caddr_t data;
	int flag;
{
	int error = 0, unit = IKUNIT(dev), s;
	register struct ik_softc *sc = &ik_softc[unit];

	switch (cmd) {

	case PSIOGETERROR:		/* get error code for last operation */
		*(int *)data = sc->is_error;
		break;

	case PSIOLOOKUP: {		/* PS300 name lookup */
		register struct pslookup *lp = (struct pslookup *)data;
		register struct buf *bp;

		if (lp->pl_len > PS_MAXNAMELEN)
			return (EINVAL);
		bp = &rikbuf[unit];
		s = splbio();
		while (bp->b_flags&B_BUSY) {
			bp->b_flags |= B_WANTED;
			sleep((caddr_t)bp, PRIBIO+1);
		}
		splx(s);
		bp->b_flags = B_BUSY | B_WRITE;
		error = copyin(lp->pl_name, sc->is_buf, lp->pl_len);
		if (error == 0) {
			if (lp->pl_len&1)
				sc->is_buf[lp->pl_len] = '\0';
			error = ikcommand(dev, PS_LOOKUP, lp->pl_len);
		}
		s = splbio();
		if (bp->b_flags&B_WANTED)
			wakeup((caddr_t)bp);
		splx(s);
		bp->b_flags &= ~(B_BUSY|B_WANTED);
		lp->pl_addr = sc->is_nameaddr.l;
		break;
	}
	default:
		return (ENOTTY);
	}
	return (error);
}
#endif
Commit	Line	Data
93d65f53	1	/* ik.c 1.3 86/12/11 */
6fcffbdd SL	2
	3	#include "ik.h"
	4	#if NIK > 0
	5	/*
	6	* PS300/IKON DR-11W Device Driver.
	7	*/
	8	#include "param.h"
	9	#include "buf.h"
	10	#include "cmap.h"
	11	#include "conf.h"
	12	#include "dir.h"
	13	#include "dkstat.h"
	14	#include "map.h"
	15	#include "systm.h"
	16	#include "user.h"
	17	#include "vmmac.h"
	18	#include "proc.h"
	19	#include "uio.h"
	20	#include "kernel.h"
e1111228	21	#include "syslog.h"
6fcffbdd SL	22
	23	#include "../tahoe/mtpr.h"
	24	#include "../tahoe/pte.h"
	25
	26	#include "../tahoevba/vbavar.h"
	27	#include "../tahoevba/ikreg.h"
	28	#include "../tahoevba/psreg.h"
	29	#include "../tahoevba/psproto.h"
	30
93d65f53 SL	31	int ikprobe(), ikattach(), iktimer();
	32	struct vba_device *ikinfo[NIK];
	33	long ikstd[] = { 0 };
	34	struct vba_driver ikdriver = { ikprobe, 0, ikattach, 0, ikstd, "ik", ikinfo };
6fcffbdd	35
93d65f53	36	#define splik() spl4()
6fcffbdd SL	37	/*
	38	* Devices are organized in pairs with the odd valued
	39	* device being used for ``diagnostic'' purposes. That
	40	* is diagnostic devices don't get auto-attach'd and
	41	* detach'd on open-close.
	42	*/
93d65f53 SL	43	#define IKUNIT(dev) (minor(dev) >> 1)
	44	#define IKDIAG(dev) (minor(dev) & 01) /* is a diagnostic unit */
	45
	46	struct ik_softc {
	47	uid_t is_uid; /* uid of open processes */
	48	u_short is_timeout; /* current timeout (seconds) */
	49	u_short is_error; /* internal error codes */
	50	u_short is_flags;
	51	#define IKF_ATTACHED 0x1 /* unit is attached (not used yet) */
	52	union {
	53	u_short w[2];
	54	u_long l;
	55	} is_nameaddr; /* address of last symbol lookup */
	56	caddr_t is_buf; /* i/o buffer XXX */
6fcffbdd SL	57	} ik_softc[NIK];
6fcffbdd SL	58
93d65f53 SL	59	struct buf iktab[NIK]; /* unit command queue headers */
	60	struct buf rikbuf[NIK]; /* buffers for read/write operations */
	61	struct buf cikbuf[NIK]; /* buffers for control operations */
6fcffbdd SL	62
6fcffbdd SL	63	/* buf overlay definitions */
93d65f53	64	#define b_command b_resid
6fcffbdd	65
93d65f53 SL	66	int ikdiotimo = PS_DIOTIMO; /* dio polling timeout */
93d65f53 SL	67	int iktimeout = PS_TIMEOUT; /* attention/dma timeout (in hz) */
6fcffbdd SL	68
6fcffbdd SL	69	ikprobe(reg, vi)
93d65f53	70	caddr_t reg;
6fcffbdd SL	71	struct vba_device *vi;
6fcffbdd SL	72	{
93d65f53	73	register int br, cvec; /* r12, r11 */
6fcffbdd SL	74	register struct ikdevice *ik;
6fcffbdd SL	75
93d65f53 SL	76	if (badaddr(reg, 2))
93d65f53 SL	77	return (0);
6fcffbdd SL	78	ik = (struct ikdevice *)reg;
6fcffbdd SL	79	ik->ik_vec = --vi->ui_hd->vh_lastiv;
93d65f53 SL	80	/*
	81	* Use extended non-privileged address modifier to
	82	* insure DMA to/from intermediate buffer works when
	83	* buffer is not in lower 16Mb of memory (also avoids
	84	* other 24-bit devices mapped into overlapping regions).
	85	*/
	86	ik->ik_mod = 0xf1; /* address modifier */
	87	/*
	88	* Try and reset the PS300. Since this
	89	* won't work if it's powered off, we
	90	* can't use sucess/failure to decide
	91	* if the device is present.
	92	*/
6fcffbdd	93	br = 0;
93d65f53 SL	94	(void) psreset(ik, IKCSR_IENA);
93d65f53 SL	95	if (br == 0) /* XXX */
6fcffbdd	96	br = 0x18, cvec = ik->ik_vec; /* XXX */
93d65f53	97	return (sizeof (struct ikdevice));
6fcffbdd SL	98	}
	99
	100	/*
	101	* Perform a ``hard'' reset.
	102	*/
	103	psreset(ik, iena)
93d65f53	104	register struct ikdevice *ik;
6fcffbdd SL	105	{
6fcffbdd SL	106
93d65f53 SL	107	ik->ik_csr = IKCSR_MCLR\|iena;
	108	DELAY(10000);
	109	ik->ik_csr = IKCSR_FNC3\|iena;
	110	if (!iena)
	111	return (dioread(ik) == PS_RESET);
	112	return (1);
6fcffbdd SL	113	}
	114
	115	ikattach(vi)
93d65f53	116	struct vba_device *vi;
6fcffbdd	117	{
6fcffbdd	118
93d65f53	119	ik_softc[vi->ui_unit].is_uid = -1;
6fcffbdd SL	120	}
	121
	122	/*
	123	* Open a PS300 and attach. We allow multiple
	124	* processes with the same uid to share a unit.
	125	*/
	126	/ARGSUSED/
	127	ikopen(dev, flag)
93d65f53 SL	128	dev_t dev;
93d65f53 SL	129	int flag;
6fcffbdd	130	{
93d65f53 SL	131	register int unit = IKUNIT(dev);
	132	register struct ik_softc *sc;
	133	struct vba_device *vi;
	134	struct ikdevice *ik;
	135	int reset;
	136
	137	if (unit >= NIK \|\| (vi = ikinfo[unit]) == 0 \|\| vi->ui_alive == 0)
	138	return (ENXIO);
	139	sc = &ik_softc[unit];
	140	if (sc->is_uid != -1 && sc->is_uid != u.u_uid)
	141	return (EBUSY);
	142	if (sc->is_uid == -1) {
6fcffbdd SL	143	sc->is_buf = (caddr_t)wmemall(vmemall, PS_MAXDMA);
	144	if (sc->is_buf == 0)
	145	return (ENOMEM);
93d65f53 SL	146	sc->is_timeout = 0;
	147	timeout(iktimer, unit, hz);
	148	/*
	149	* Perform PS300 attach for first process.
	150	*/
	151	if (!IKDIAG(dev)) {
	152	reset = 0;
	153	again:
	154	if (ikcommand(dev, PS_ATTACH, 1)) {
	155	/*
	156	* If attach fails, perform a hard
	157	* reset once, then retry the command.
	158	*/
	159	ik = (struct ikdevice *)ikinfo[unit]->ui_addr;
	160	if (!reset++ && psreset(ik, 0))
	161	goto again;
	162	untimeout(iktimer, unit);
6fcffbdd SL	163	wmemfree(sc->is_buf, PS_MAXDMA);
6fcffbdd SL	164	sc->is_buf = 0;
93d65f53 SL	165	return (EIO);
	166	}
	167	}
	168	sc->is_uid = u.u_uid;
	169	}
	170	return (0);
6fcffbdd SL	171	}
	172
	173	/ARGSUSED/
	174	ikclose(dev, flag)
93d65f53 SL	175	dev_t dev;
93d65f53 SL	176	int flag;
6fcffbdd	177	{
93d65f53	178	int unit = IKUNIT(dev);
6fcffbdd SL	179	register struct ik_softc *sc = &ik_softc[unit];
6fcffbdd SL	180
93d65f53 SL	181	if (!IKDIAG(dev))
	182	(void) ikcommand(dev, PS_DETACH, 1); /* auto detach */
	183	sc->is_uid = -1;
6fcffbdd SL	184	if (sc->is_buf) {
	185	wmemfree(sc->is_buf, PS_MAXDMA);
	186	sc->is_buf = 0;
	187	}
93d65f53	188	untimeout(iktimer, unit);
6fcffbdd SL	189	}
	190
	191	ikread(dev, uio)
93d65f53 SL	192	dev_t dev;
93d65f53 SL	193	struct uio *uio;
6fcffbdd SL	194	{
6fcffbdd SL	195
93d65f53	196	return (ikrw(dev, uio, B_READ));
6fcffbdd SL	197	}
	198
	199	ikwrite(dev, uio)
93d65f53 SL	200	dev_t dev;
93d65f53 SL	201	struct uio *uio;
6fcffbdd SL	202	{
6fcffbdd SL	203
93d65f53	204	return (ikrw(dev, uio, B_WRITE));
6fcffbdd SL	205	}
	206
	207	/*
	208	* Take read/write request and perform physical i/o
	209	* transaction with PS300. This involves constructing
	210	* a physical i/o request vector based on the uio
	211	* vector, performing the dma, and, finally, moving
	212	* the data to it's final destination (because of CCI
	213	* VERSAbus bogosities).
	214	*/
	215	ikrw(dev, uio, rw)
93d65f53 SL	216	dev_t dev;
	217	register struct uio *uio;
	218	int rw;
6fcffbdd	219	{
93d65f53 SL	220	int error, unit = IKUNIT(dev), s, wrcmd;
	221	register struct buf *bp;
	222	register struct iovec *iov;
	223	register struct psalist *ap;
	224	struct ik_softc *sc = &ik_softc[unit];
	225
	226	if (unit >= NIK)
	227	return (ENXIO);
	228	bp = &rikbuf[unit];
	229	error = 0, iov = uio->uio_iov, wrcmd = PS_WRPHY;
	230	for (; !error && uio->uio_iovcnt; iov++, uio->uio_iovcnt--) {
	231	/*
	232	* Hack way to set PS300 address w/o doing an lseek
	233	* and specify write physical w/ refresh synchronization.
	234	*/
	235	if (iov->iov_len == 0) {
	236	if ((int)iov->iov_base&PSIO_SYNC)
	237	wrcmd = PS_WRPHY_SYNC;
	238	uio->uio_offset = (int)iov->iov_base & ~PSIO_SYNC;
	239	continue;
	240	}
	241	if (iov->iov_len > PS_MAXDMA) {
	242	sc->is_error = PSERROR_INVALBC, error = EINVAL;
	243	continue;
	244	}
	245	if ((int)uio->uio_offset&01) {
	246	sc->is_error = PSERROR_BADADDR, error = EINVAL;
	247	continue;
	248	}
	249	s = splbio();
	250	while (bp->b_flags&B_BUSY) {
	251	bp->b_flags \|= B_WANTED;
	252	sleep((caddr_t)bp, PRIBIO+1);
	253	}
	254	splx(s);
	255	bp->b_flags = B_BUSY \| rw;
	256	/*
	257	* Construct address descriptor in buffer.
	258	*/
	259	ap = (struct psalist *)sc->is_buf;
	260	ap->nblocks = 1;
	261	/* work-around dr300 word swapping */
	262	ap->addr[0] = uio->uio_offset & 0xffff;
	263	ap->addr[1] = uio->uio_offset >> 16;
	264	ap->wc = (iov->iov_len + 1) >> 1;
	265	if (rw == B_WRITE) {
	266	error = copyin(iov->iov_base, (caddr_t)&ap[1],
	267	iov->iov_len);
	268	if (!error)
	269	error = ikcommand(dev, wrcmd,
	270	iov->iov_len + sizeof (*ap));
	271	} else {
	272	caddr_t cp;
	273	int len;
	274
	275	error = ikcommand(dev, PS_RDPHY, sizeof (*ap));
	276	cp = (caddr_t)&ap[1], len = iov->iov_len;
	277	for (; len > 0; len -= NBPG, cp += NBPG)
	278	mtpr(P1DC, cp);
	279	if (!error)
	280	error = copyout((caddr_t)&ap[1], iov->iov_base,
	281	iov->iov_len);
	282	}
	283	(void) splbio();
284	if (bp->b_flags&B_WANTED)
285	wakeup((caddr_t)bp);
286	splx(s);
287	uio->uio_resid -= iov->iov_len;
288	uio->uio_offset += iov->iov_len;
289	bp->b_flags &= ~(B_BUSY\|B_WANTED);
290	}
291	return (error);
6fcffbdd SL	292	}
	293
	294	/*
	295	* Perform a PS300 command.
	296	*/
	297	ikcommand(dev, com, count)
93d65f53 SL	298	dev_t dev;
93d65f53 SL	299	int com, count;
6fcffbdd	300	{
93d65f53 SL	301	register struct buf *bp;
	302	register int s;
	303
	304	bp = &cikbuf[IKUNIT(dev)];
	305	s = splik();
	306	while (bp->b_flags&B_BUSY) {
	307	if (bp->b_flags&B_DONE)
	308	break;
	309	bp->b_flags \|= B_WANTED;
	310	sleep((caddr_t)bp, PRIBIO);
	311	}
	312	bp->b_flags = B_BUSY\|B_READ;
	313	splx(s);
	314	bp->b_dev = dev;
	315	bp->b_command = com;
	316	bp->b_bcount = count;
	317	ikstrategy(bp);
	318	biowait(bp);
	319	if (bp->b_flags&B_WANTED)
	320	wakeup((caddr_t)bp);
	321	bp->b_flags &= B_ERROR;
	322	return (geterror(bp));
6fcffbdd SL	323	}
	324
	325	/*
	326	* Physio strategy routine
	327	*/
	328	ikstrategy(bp)
93d65f53	329	register struct buf *bp;
6fcffbdd	330	{
93d65f53 SL	331	register struct buf *dp;
	332
	333	/*
	334	* Put request at end of controller queue.
	335	*/
	336	dp = &iktab[IKUNIT(bp->b_dev)];
	337	bp->av_forw = NULL;
	338	(void) splik();
	339	if (dp->b_actf != NULL) {
	340	dp->b_actl->av_forw = bp;
	341	dp->b_actl = bp;
	342	} else
	343	dp->b_actf = dp->b_actl = bp;
	344	if (!dp->b_active)
	345	ikstart(dp);
	346	(void) spl0();
6fcffbdd SL	347	}
	348
	349	/*
	350	* Start the next command on the controller's queue.
	351	*/
	352	ikstart(dp)
93d65f53	353	register struct buf *dp;
6fcffbdd	354	{
93d65f53 SL	355	register struct buf *bp;
	356	register struct ikdevice *ik;
	357	register struct ik_softc *sc;
	358	register struct psalist *ap;
	359	u_short bc, csr;
	360	u_int addr;
	361	int unit;
6fcffbdd SL	362
6fcffbdd SL	363	loop:
93d65f53 SL	364	/*
	365	* Pull a request off the controller queue
	366	*/
	367	if ((bp = dp->b_actf) == NULL) {
	368	dp->b_active = 0;
	369	return;
	370	}
	371	/*
	372	* Mark controller busy and process this request.
	373	*/
	374	dp->b_active = 1;
	375	unit = IKUNIT(bp->b_dev);
	376	sc = &ik_softc[unit];
	377	ik = (struct ikdevice *)ikinfo[unit]->ui_addr;
	378	switch (bp->b_command) {
	379
	380	case PS_ATTACH: /* logical unit attach */
	381	case PS_DETACH: /* logical unit detach */
	382	case PS_LOOKUP: /* name lookup */
	383	case PS_RDPHY: /* physical i/o read */
	384	case PS_WRPHY: /* physical i/o write */
	385	case PS_WRPHY_SYNC: /* physical i/o write w/ sync */
	386	/*
	387	* Handshake command and, optionally,
	388	* byte count and byte swap flag.
	389	*/
	390	if (sc->is_error = diowrite(ik, bp->b_command))
	391	goto bad;
	392	if (bp->b_command < PS_DETACH) {
	393	if (sc->is_error = diowrite(ik, bp->b_bcount))
	394	goto bad;
	395	if (sc->is_error = diowrite(ik, 0 /* !swab */))
	396	goto bad;
	397	}
	398	/*
	399	* Set timeout and wait for an attention interrupt.
	400	*/
	401	sc->is_timeout = iktimeout;
	402	return;
	403
	404	case PS_DMAOUT: /* dma data host->PS300 */
	405	bc = bp->b_bcount;
	406	csr = IKCSR_CYCLE;
	407	break;
	408
	409	case PS_DMAIN: /* dma data PS300->host */
	410	bc = bp->b_bcount;
	411	csr = IKCSR_CYCLE\|IKCSR_FNC1;
	412	break;
	413
	414	default:
	415	log(LOG_ERR, "ik%d: bad cmd %x\n", unit, bp->b_command);
	416	sc->is_error = PSERROR_BADCMD;
	417	goto bad;
	418	}
	419	/* initiate dma transfer */
	420	addr = vtoph((struct proc *)0, sc->is_buf);
	421	ik->ik_bahi = addr >> 17;
	422	ik->ik_balo = (addr >> 1) & 0xffff;
	423	ik->ik_wc = ((bc + 1) >> 1) - 1; /* round & convert */
	424	ik->ik_pulse = IKPULSE_RATTF\|IKPULSE_RDMAF;
	425	sc->is_timeout = iktimeout;
	426	ik->ik_csr = IKCSR_IENA\|IKCSR_GO\|csr;
	427	return;
6fcffbdd	428	bad:
93d65f53 SL	429	bp->b_flags \|= B_ERROR;
	430	dp->b_actf = bp->av_forw; /* remove from queue */
	431	biodone(bp);
	432	goto loop;
6fcffbdd SL	433	}
	434
	435	#define FETCHWORD(i) { \
93d65f53	436	int v; \
6fcffbdd	437	\
93d65f53 SL	438	v = dioread(ik); \
	439	if (v == -1) { \
	440	sc->is_error = PSERROR_NAMETIMO; \
	441	goto bad; \
	442	} \
	443	sc->is_nameaddr.w[i] = v; \
6fcffbdd SL	444	}
	445
	446	/*
	447	* Process a device interrupt.
	448	*/
	449	ikintr(ikon)
93d65f53	450	int ikon;
6fcffbdd	451	{
93d65f53 SL	452	register struct ikdevice *ik;
	453	register struct buf bp, dp;
	454	struct ik_softc *sc;
	455	register u_short data;
	456	u_short i, v;
	457
	458	/* should go by controller, but for now... */
	459	if (ikinfo[ikon] == 0)
	460	return;
	461	ik = (struct ikdevice *)ikinfo[ikon]->ui_addr;
	462	/*
	463	* Discard all non-attention interrupts. The
	464	* interrupts we're throwing away should all be
	465	* associated with DMA completion.
	466	*/
	467	data = ik->ik_data;
	468	if ((ik->ik_csr&(IKCSR_ATTF\|IKCSR_STATC)) != IKCSR_ATTF) {
	469	ik->ik_pulse = IKPULSE_RATTF\|IKPULSE_RDMAF\|IKPULSE_SIENA;
	470	return;
	471	}
	472	/*
	473	* Fetch attention code immediately.
	474	*/
	475	ik->ik_csr = IKCSR_RATTF\|IKCSR_RDMAF\|IKCSR_FNC1;
	476	ik->ik_pulse = IKPULSE_FNC2;
	477	/*
	478	* Get device and block structures, and a pointer
	479	* to the vba_device for the device. We receive an
	480	* unsolicited interrupt whenever the PS300 is power
	481	* cycled (so ignore it in that case).
	482	*/
	483	dp = &iktab[ikon];
	484	if ((bp = dp->b_actf) == NULL) {
	485	if (PS_CODE(data) != PS_RESET) /* power failure */
	486	log(LOG_WARNING, "ik%d: spurious interrupt, code %x\n",
	487	ikon, data);
	488	goto enable;
	489	}
	490	sc = &ik_softc[IKUNIT(bp->b_dev)];
	491	sc->is_timeout = 0; /* disable timer */
	492	switch (PS_CODE(data)) {
	493
	494	case PS_LOOKUP: /* name lookup */
	495	if (data == PS_LOOKUP) { /* dma name */
	496	bp->b_command = PS_DMAOUT;
	497	goto opcont;
	498	}
	499	if (data == PS_DMAOK(PS_LOOKUP)) {
	500	/* reenable interrupt and wait for address */
	501	sc->is_timeout = iktimeout;
	502	goto enable;
	503	}
	504	/*
	505	* Address should be present, extract it one
	506	* word at a time from the PS300 (yech).
	507	*/
	508	if (data != PS_ADROK(PS_LOOKUP))
	509	goto bad;
	510	FETCHWORD(0);
	511	FETCHWORD(1);
	512	goto opdone;
	513
	514	case PS_WRPHY_SYNC: /* physical i/o write w/ sync */
	515	if (data == PS_WRPHY_SYNC) { /* start dma transfer */
516	bp->b_command = PS_DMAOUT;
517	goto opcont;
518	}
519	if (data != PS_DMAOK(PS_WRPHY_SYNC))
520	goto bad;
521	goto opdone;
522
523	case PS_WRPHY: /* physical i/o write */
524	if (data == PS_WRPHY) { /* start dma transfer */
525	bp->b_command = PS_DMAOUT;
526	goto opcont;
527	}
528	if (data != PS_DMAOK(PS_WRPHY))
529	goto bad;
530	goto opdone;
531
532	case PS_ATTACH: /* attach unit */
533	case PS_DETACH: /* detach unit */
534	case PS_ABORT: /* abort code from ps300 */
535	if (data != bp->b_command)
536	goto bad;
537	goto opdone;
538
539	case PS_RDPHY: /* physical i/o read */
540	if (data == PS_RDPHY) { /* dma address list */
541	bp->b_command = PS_DMAOUT;
542	goto opcont;
543	}
544	if (data == PS_ADROK(PS_RDPHY)) {
545	/* collect read byte count and start dma */
546	bp->b_bcount = dioread(ik);
547	if (bp->b_bcount == -1)
548	goto bad;
549	bp->b_command = PS_DMAIN;
550	goto opcont;
551	}
552	if (data == PS_DMAOK(PS_RDPHY))
553	goto opdone;
554	goto bad;
555	}
6fcffbdd	556	bad:
93d65f53 SL	557	sc->is_error = data;
93d65f53 SL	558	bp->b_flags \|= B_ERROR;
6fcffbdd	559	opdone:
93d65f53 SL	560	dp->b_actf = bp->av_forw; /* remove from queue */
93d65f53 SL	561	biodone(bp);
6fcffbdd	562	opcont:
93d65f53	563	ikstart(dp);
6fcffbdd	564	enable:
93d65f53	565	ik->ik_pulse = IKPULSE_SIENA; /* explicitly reenable */
6fcffbdd SL	566	}
	567
	568	/*
	569	* Watchdog timer.
	570	*/
	571	iktimer(unit)
93d65f53	572	int unit;
6fcffbdd	573	{
93d65f53 SL	574	register struct ik_softc *sc = &ik_softc[unit];
	575
	576	if (sc->is_timeout && --sc->is_timeout == 0) {
	577	register struct buf dp, bp;
	578	int s;
	579
	580	log(LOG_ERR, "ik%d: timeout\n", unit);
	581	s = splik();
	582	/* should abort current command */
	583	dp = &iktab[unit];
	584	if (bp = dp->b_actf) {
	585	sc->is_error = PSERROR_CMDTIMO;
	586	bp->b_flags \|= B_ERROR;
	587	dp->b_actf = bp->av_forw; /* remove from queue */
	588	biodone(bp);
	589	ikstart(dp);
	590	}
	591	splx(s);
	592	}
	593	timeout(iktimer, unit, hz);
6fcffbdd SL	594	}
	595
	596	/*
	597	* Handshake read from DR300.
	598	*/
	599	dioread(ik)
93d65f53	600	register struct ikdevice *ik;
6fcffbdd	601	{
93d65f53 SL	602	register int timeout;
	603	u_short data;
	604
	605	for (timeout = ikdiotimo; timeout > 0; timeout--)
	606	if ((ik->ik_csr&(IKCSR_ATTF\|IKCSR_STATC)) == IKCSR_ATTF) {
	607	data = ik->ik_data;
	608	ik->ik_csr = IKCSR_RATTF\|IKCSR_RDMAF\|IKCSR_FNC1;
	609	ik->ik_pulse = IKPULSE_FNC2;
	610	return (data);
	611	}
	612	return (-1);
6fcffbdd SL	613	}
	614
	615	/*
	616	* Handshake write to DR300.
	617	*
	618	* Interrupts are enabled before completing the work
	619	* so the caller should either be at splik or be
	620	* prepared to take the interrupt immediately.
	621	*/
	622	diowrite(ik, v)
93d65f53 SL	623	register struct ikdevice *ik;
93d65f53 SL	624	u_short v;
6fcffbdd	625	{
93d65f53 SL	626	register int timeout;
93d65f53 SL	627	register u_short csr;
6fcffbdd SL	628
6fcffbdd SL	629	top:
93d65f53 SL	630	/*
	631	* Deposit data and generate dr300 attention
	632	*/
	633	ik->ik_data = v;
	634	ik->ik_csr = IKCSR_RDMAF\|IKCSR_RATTF;
	635	ik->ik_pulse = IKPULSE_FNC2;
	636	for (timeout = ikdiotimo; timeout > 0; timeout--) {
	637	csr = ik->ik_csr;
	638	#define IKCSR_DONE (IKCSR_STATA\|IKCSR_STATC)
	639	if ((csr&IKCSR_DONE) == IKCSR_DONE) {
	640	/*
	641	* Done, complete handshake by notifying dr300.
	642	*/
	643	ik->ik_csr = IKCSR_IENA; /* ~IKCSR_FNC1 */
	644	ik->ik_pulse = IKPULSE_FNC2;
	645	return (0);
	646	}
	647	/* beware of potential deadlock with dioread */
	648	if ((csr&(IKCSR_ATTF\|IKCSR_STATC)) == IKCSR_ATTF)
	649	goto top;
	650	}
	651	ik->ik_csr = IKCSR_IENA;
	652	return (PSERROR_DIOTIMO);
6fcffbdd SL	653	}
	654
	655	/ARGSUSED/
	656	ikioctl(dev, cmd, data, flag)
93d65f53 SL	657	dev_t dev;
	658	int cmd;
	659	caddr_t data;
	660	int flag;
6fcffbdd	661	{
93d65f53 SL	662	int error = 0, unit = IKUNIT(dev), s;
	663	register struct ik_softc *sc = &ik_softc[unit];
	664
	665	switch (cmd) {
	666
	667	case PSIOGETERROR: /* get error code for last operation */
	668	(int )data = sc->is_error;
	669	break;
	670
	671	case PSIOLOOKUP: { /* PS300 name lookup */
	672	register struct pslookup lp = (struct pslookup )data;
	673	register struct buf *bp;
	674
	675	if (lp->pl_len > PS_MAXNAMELEN)
	676	return (EINVAL);
	677	bp = &rikbuf[unit];
	678	s = splbio();
	679	while (bp->b_flags&B_BUSY) {
	680	bp->b_flags \|= B_WANTED;
	681	sleep((caddr_t)bp, PRIBIO+1);
	682	}
	683	splx(s);
	684	bp->b_flags = B_BUSY \| B_WRITE;
	685	error = copyin(lp->pl_name, sc->is_buf, lp->pl_len);
	686	if (error == 0) {
	687	if (lp->pl_len&1)
	688	sc->is_buf[lp->pl_len] = '\0';
	689	error = ikcommand(dev, PS_LOOKUP, lp->pl_len);
	690	}
	691	s = splbio();
	692	if (bp->b_flags&B_WANTED)
	693	wakeup((caddr_t)bp);
	694	splx(s);
	695	bp->b_flags &= ~(B_BUSY\|B_WANTED);
	696	lp->pl_addr = sc->is_nameaddr.l;
	697	break;
	698	}
	699	default:
	700	return (ENOTTY);
	701	}
	702	return (error);
6fcffbdd SL	703	}
6fcffbdd SL	704	#endif