initial import of NetBSD tree

1 files changed, 361 insertions, 0 deletions

diff --git a/sys/scsi/scsi_ioctl.c b/sys/scsi/scsi_ioctl.c
new file mode 100644
index 00000000000..3bc77130a63
--- /dev/null
+++ b/sys/scsi/scsi_ioctl.c
@@ -0,0 +1,361 @@
+/*	$NetBSD: scsi_ioctl.c,v 1.19 1995/09/26 19:26:58 thorpej Exp $	*/
+
+/*
+ * Copyright (c) 1994 Charles Hannum.  All rights reserved.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Charles Hannum.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/* 
+ * Contributed by HD Associates (hd@world.std.com).
+ * Copyright (c) 1992, 1993 HD Associates
+ *
+ * Berkeley style copyright.  
+ */
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/buf.h>
+#include <sys/proc.h>
+#include <sys/device.h>
+
+#include <scsi/scsi_all.h>
+#include <scsi/scsiconf.h>
+#include <sys/scsiio.h>
+
+struct scsi_ioctl {
+	LIST_ENTRY(scsi_ioctl) si_list;
+	struct buf si_bp;
+	struct uio si_uio;
+	struct iovec si_iov;
+	scsireq_t si_screq;
+	struct scsi_link *si_sc_link;
+};
+
+LIST_HEAD(, scsi_ioctl) si_head;
+
+struct scsi_ioctl *
+si_get()
+{
+	struct scsi_ioctl *si;
+	int s;
+
+	si = malloc(sizeof(struct scsi_ioctl), M_TEMP, M_WAITOK);
+	bzero(si, sizeof(struct scsi_ioctl));
+	s = splbio();
+	LIST_INSERT_HEAD(&si_head, si, si_list);
+	splx(s);
+	return (si);
+}
+
+void
+si_free(si)
+	struct scsi_ioctl *si;
+{
+	int s;
+
+	s = splbio();
+	LIST_REMOVE(si, si_list);
+	splx(s);
+	free(si, M_TEMP);
+}
+
+struct scsi_ioctl *
+si_find(bp)
+	struct buf *bp;
+{
+	struct scsi_ioctl *si;
+	int s;
+
+	s = splbio();
+	for (si = si_head.lh_first; si != 0; si = si->si_list.le_next)
+		if (bp == &si->si_bp)
+			break;
+	splx(s);
+	return (si);
+}
+
+/*
+ * We let the user interpret his own sense in the generic scsi world.
+ * This routine is called at interrupt time if the SCSI_USER bit was set
+ * in the flags passed to scsi_scsi_cmd(). No other completion processing
+ * takes place, even if we are running over another device driver.
+ * The lower level routines that call us here, will free the xs and restart
+ * the device's queue if such exists.
+ */
+void
+scsi_user_done(xs)
+	struct scsi_xfer *xs;
+{
+	struct buf *bp;
+	struct scsi_ioctl *si;
+	scsireq_t *screq;
+	struct scsi_link *sc_link;
+
+	bp = xs->bp;
+	if (!bp) {	/* ALL user requests must have a buf */
+		sc_print_addr(xs->sc_link);
+		printf("User command with no buf\n");
+		return;
+	}
+	si = si_find(bp);
+	if (!si) {
+		sc_print_addr(xs->sc_link);
+		printf("User command with no ioctl\n");
+		return;
+	}
+	screq = &si->si_screq;
+	sc_link = si->si_sc_link;
+	SC_DEBUG(xs->sc_link, SDEV_DB2, ("user-done\n"));
+
+	screq->retsts = 0;
+	screq->status = xs->status;
+	switch (xs->error) {
+	case XS_NOERROR:
+		SC_DEBUG(sc_link, SDEV_DB3, ("no error\n"));
+		screq->datalen_used = xs->datalen - xs->resid; /* probably rubbish */
+		screq->retsts = SCCMD_OK;
+		break;
+	case XS_SENSE:
+		SC_DEBUG(sc_link, SDEV_DB3, ("have sense\n"));
+		screq->senselen_used = min(sizeof(xs->sense), SENSEBUFLEN);
+		bcopy(&xs->sense, screq->sense, screq->senselen);
+		screq->retsts = SCCMD_SENSE;
+		break;
+	case XS_DRIVER_STUFFUP:
+		sc_print_addr(sc_link);
+		printf("host adapter code inconsistency\n");
+		screq->retsts = SCCMD_UNKNOWN;
+		break;
+	case XS_TIMEOUT:
+		SC_DEBUG(sc_link, SDEV_DB3, ("timeout\n"));
+		screq->retsts = SCCMD_TIMEOUT;
+		break;
+	case XS_BUSY:
+		SC_DEBUG(sc_link, SDEV_DB3, ("busy\n"));
+		screq->retsts = SCCMD_BUSY;
+		break;
+	default:
+		sc_print_addr(sc_link);
+		printf("unknown error category from host adapter code\n");
+		screq->retsts = SCCMD_UNKNOWN;
+		break;
+	}
+	biodone(bp); 	/* we're waiting on it in scsi_strategy() */
+}
+
+
+/* Pseudo strategy function
+ * Called by scsi_do_ioctl() via physio/physstrat if there is to
+ * be data transfered, and directly if there is no data transfer.
+ * 
+ * Should I reorganize this so it returns to physio instead
+ * of sleeping in scsiio_scsi_cmd?  Is there any advantage, other
+ * than avoiding the probable duplicate wakeup in iodone? [PD]
+ *
+ * No, seems ok to me... [JRE]
+ * (I don't see any duplicate wakeups)
+ *
+ * Can't be used with block devices or raw_read/raw_write directly
+ * from the cdevsw/bdevsw tables because they couldn't have added
+ * the screq structure. [JRE]
+ */
+void
+scsistrategy(bp)
+	struct buf *bp;
+{
+	struct scsi_ioctl *si;
+	scsireq_t *screq;
+	struct scsi_link *sc_link;
+	int error;
+	int flags = 0;
+	int s;
+
+	si = si_find(bp);
+	if (!si) {
+		printf("user_strat: No ioctl\n");
+		error = EINVAL;
+		goto bad;
+	}
+	screq = &si->si_screq;
+	sc_link = si->si_sc_link;
+	SC_DEBUG(sc_link, SDEV_DB2, ("user_strategy\n"));
+
+	/*
+	 * We're in trouble if physio tried to break up the transfer.
+	 */
+	if (bp->b_bcount != screq->datalen) {
+		sc_print_addr(sc_link);
+		printf("physio split the request.. cannot proceed\n");
+		error = EIO;
+		goto bad;
+	}
+
+	if (screq->timeout == 0) {
+		error = EINVAL;
+		goto bad;
+	}
+
+	if (screq->cmdlen > sizeof(struct scsi_generic)) {
+		sc_print_addr(sc_link);
+		printf("cmdlen too big\n");
+		error = EFAULT;
+		goto bad;
+	}
+
+	if (screq->flags & SCCMD_READ)
+		flags |= SCSI_DATA_IN;
+	if (screq->flags & SCCMD_WRITE)
+		flags |= SCSI_DATA_OUT;
+	if (screq->flags & SCCMD_TARGET)
+		flags |= SCSI_TARGET;
+	if (screq->flags & SCCMD_ESCAPE)
+		flags |= SCSI_ESCAPE;
+
+	error = scsi_scsi_cmd(sc_link, (struct scsi_generic *)screq->cmd,
+	    screq->cmdlen, (u_char *)bp->b_data, screq->datalen,
+	    0, /* user must do the retries *//* ignored */
+	    screq->timeout, bp, flags | SCSI_USER | SCSI_NOSLEEP);
+
+	/* because there is a bp, scsi_scsi_cmd will return immediatly */
+	if (error)
+		goto bad;
+
+	SC_DEBUG(sc_link, SDEV_DB3, ("about to sleep\n"));
+	s = splbio();
+	while ((bp->b_flags & B_DONE) == 0)
+		tsleep(bp, PRIBIO, "scistr", 0);
+	splx(s);
+	SC_DEBUG(sc_link, SDEV_DB3, ("back from sleep\n"));
+
+	return;
+
+bad:
+	bp->b_flags |= B_ERROR;
+	bp->b_error = error;
+	biodone(bp);
+}
+
+/*
+ * Something (e.g. another driver) has called us
+ * with an sc_link for a target/lun/adapter, and a scsi
+ * specific ioctl to perform, better try.
+ * If user-level type command, we must still be running
+ * in the context of the calling process
+ */
+int
+scsi_do_ioctl(sc_link, dev, cmd, addr, flag, p)
+	struct scsi_link *sc_link;
+	dev_t dev;
+	u_long cmd;
+	caddr_t addr;
+	int flag;
+	struct proc *p;
+{
+	int error;
+
+	SC_DEBUG(sc_link, SDEV_DB2, ("scsi_do_ioctl(0x%lx)\n", cmd));
+
+	switch(cmd) {
+	case SCIOCCOMMAND: {
+		scsireq_t *screq = (scsireq_t *)addr;
+		struct scsi_ioctl *si;
+		int len;
+
+		si = si_get();
+		si->si_screq = *screq;
+		si->si_sc_link = sc_link;
+		len = screq->datalen;
+		if (len) {
+			si->si_iov.iov_base = screq->databuf;
+			si->si_iov.iov_len = len;
+			si->si_uio.uio_iov = &si->si_iov;
+			si->si_uio.uio_iovcnt = 1;
+			si->si_uio.uio_resid = len;
+			si->si_uio.uio_offset = 0;
+			si->si_uio.uio_segflg = UIO_USERSPACE;
+			si->si_uio.uio_rw = 
+			    (screq->flags & SCCMD_READ) ? UIO_READ : UIO_WRITE;
+			si->si_uio.uio_procp = p;
+			error = physio(scsistrategy, &si->si_bp, dev,
+			    (screq->flags & SCCMD_READ) ? B_READ : B_WRITE,
+			    sc_link->adapter->scsi_minphys, &si->si_uio);
+		} else {
+			/* if no data, no need to translate it.. */
+			si->si_bp.b_flags = 0;
+			si->si_bp.b_data = 0;
+			si->si_bp.b_bcount = 0;
+			si->si_bp.b_dev = dev;
+			si->si_bp.b_proc = p;
+			scsistrategy(&si->si_bp);
+			error = si->si_bp.b_error;
+		}
+		*screq = si->si_screq;
+		si_free(si);
+		return error;
+	}
+	case SCIOCDEBUG: {
+		int level = *((int *)addr);
+
+		SC_DEBUG(sc_link, SDEV_DB3, ("debug set to %d\n", level));
+		sc_link->flags &= ~SDEV_DBX; /* clear debug bits */
+		if (level & 1)
+			sc_link->flags |= SDEV_DB1;
+		if (level & 2)
+			sc_link->flags |= SDEV_DB2;
+		if (level & 4)
+			sc_link->flags |= SDEV_DB3;
+		if (level & 8)
+			sc_link->flags |= SDEV_DB4;
+		return 0;
+	}
+	case SCIOCREPROBE: {
+		struct scsi_addr *sca = (struct scsi_addr *)addr;
+
+		return scsi_probe_busses(sca->scbus, sca->target, sca->lun);
+	}
+	case SCIOCRECONFIG:
+	case SCIOCDECONFIG:
+		return EINVAL;
+	case SCIOCIDENTIFY: {
+		struct scsi_addr *sca = (struct scsi_addr *)addr;
+
+		sca->scbus = sc_link->scsibus;
+		sca->target = sc_link->target;
+		sca->lun = sc_link->lun;
+		return 0;
+	}
+	default:
+		return ENOTTY;
+	}
+
+#ifdef DIAGNOSTIC
+	panic("scsi_do_ioctl: impossible");
+#endif
+}