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-rw-r--r--sys/scsi/scsi_ioctl.c329
1 files changed, 329 insertions, 0 deletions
diff --git a/sys/scsi/scsi_ioctl.c b/sys/scsi/scsi_ioctl.c
new file mode 100644
index 0000000..c1b576d
--- /dev/null
+++ b/sys/scsi/scsi_ioctl.c
@@ -0,0 +1,329 @@
+/*
+ * 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/malloc.h>
+#include <sys/buf.h>
+#define b_screq b_driver1 /* a patch in buf.h */
+#define b_sc_link b_driver2 /* a patch in buf.h */
+#include <sys/proc.h>
+
+#include "scbus.h"
+#include <scsi/scsi_all.h>
+#include <scsi/scsiconf.h>
+#include <sys/scsiio.h>
+
+
+/*
+ * 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.
+ */
+#ifndef min
+#define min(A,B) ((A<B) ? A : B )
+#endif
+
+void scsi_user_done(xs)
+struct scsi_xfer *xs;
+{
+
+ struct buf *bp;
+ scsireq_t *screq;
+
+ 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 ;
+ }
+ screq = bp->b_screq;
+ if (!screq) { /* Is it one of ours? (the SCSI_USER bit says it is) */
+ sc_print_addr(xs->sc_link);
+ printf("User command with no request\n");
+ return ;
+ }
+
+ 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(xs->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(xs->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(xs->sc_link);
+ printf("host adapter code inconsistency\n");
+ screq->retsts = SCCMD_UNKNOWN;
+ break;
+
+ case XS_TIMEOUT:
+ SC_DEBUG(xs->sc_link,SDEV_DB3,("timeout\n"));
+ screq->retsts = SCCMD_TIMEOUT;
+ break;
+
+ case XS_BUSY:
+ SC_DEBUG(xs->sc_link,SDEV_DB3,("busy\n"));
+ screq->retsts = SCCMD_BUSY;
+ break;
+
+ default:
+ sc_print_addr(xs->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() */
+ return; /* it'll free the xs and restart any queue */
+}
+
+
+/* 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(struct buf *bp)
+{
+ errval err;
+ struct scsi_link *sc_link = bp->b_sc_link;
+ scsireq_t *screq;
+ u_int32 flags = 0;
+ int s;
+
+
+ if(!sc_link) {
+ printf("user_strat: No link pointer\n");
+ scsierr(bp,EINVAL);
+ return;
+ }
+ SC_DEBUG(sc_link,SDEV_DB2,("user_strategy\n"));
+ screq = bp->b_screq;
+ if(!screq) {
+ sc_print_addr(sc_link);
+ printf("No request block\n");
+ scsierr(bp,EINVAL);
+ return;
+ }
+
+ /* 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");
+ scsierr(bp, EIO);
+ return;
+ }
+
+ if (screq->timeout == 0) {
+ scsierr(bp, EINVAL);
+ return;
+ }
+
+ if (screq->cmdlen > sizeof(struct scsi_generic)) {
+ sc_print_addr(sc_link);
+ printf("cmdlen too big ");
+ scsierr(bp, EFAULT);
+ return;
+ }
+
+
+ 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;
+ err = scsi_scsi_cmd(sc_link,
+ (struct scsi_generic *)screq->cmd,
+ screq->cmdlen,
+ (u_char *)bp->b_un.b_addr,
+ screq->datalen,
+ 0, /* user must do the retries *//* ignored */
+ screq->timeout,
+ bp,
+ flags | SCSI_USER);
+
+
+
+ /*because there is a bp, scsi_scsi_cmd will return immediatly*/
+ if (err)
+ {
+ scsierr(bp, err);
+ return;
+ }
+ SC_DEBUG(sc_link,SDEV_DB3,("about to sleep\n"));
+ s = splbio();
+ while(!(bp->b_flags & B_DONE))
+ {
+ sleep(bp,PRIBIO);
+ }
+ splx(s);
+ SC_DEBUG(sc_link,SDEV_DB3,("back from sleep\n"));
+ return;
+}
+
+void scsiminphys(struct buf *bp)
+{
+ /*XXX*//* call the adapter's minphys */
+}
+
+
+/*
+ * 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
+ */
+errval scsi_do_ioctl(struct scsi_link *sc_link, int cmd, caddr_t addr, int f)
+{
+ errval ret = 0;
+ int phys;
+
+ SC_DEBUG(sc_link,SDEV_DB2,("scsi_do_ioctl(0x%x)\n",cmd));
+ switch(cmd)
+ {
+#ifndef NetBSD
+ case SCIOCCOMMAND:
+ {
+ /*
+ * You won't believe this, but the arg copied in
+ * from the user space, is on the kernel stack
+ * for this process, so we can't write
+ * to it at interrupt time..
+ * we need to copy it in and out!
+ * Make a static copy using malloc!
+ */
+ scsireq_t *screq2 = (scsireq_t *)addr;
+ scsireq_t *screq = (scsireq_t *)addr;
+ int rwflag = (screq->flags & SCCMD_READ) ? B_READ : B_WRITE;
+ struct buf *bp;
+ caddr_t d_addr;
+ int len;
+
+ if((unsigned int)screq < (unsigned int)0xfe000000)
+ {
+ screq = malloc(sizeof(scsireq_t),M_TEMP,M_WAITOK);
+ bcopy(screq2,screq,sizeof(scsireq_t));
+ }
+ bp = malloc(sizeof (struct buf),M_TEMP,M_WAITOK);
+ bzero(bp,sizeof(struct buf));
+ d_addr = screq->databuf;
+ bp->b_bcount = len = screq->datalen;
+ bp->b_screq = screq;
+ bp->b_sc_link = sc_link;
+ if (len) {
+ /* have data, translate it. (physio)*/
+#ifdef __NetBSD__
+#error "dev, mincntfn & uio need defining"
+ ret = physio(scsistrategy, bp, dev, rwflag,
+ mincntfn, uio);
+#else
+ ret = physio(scsistrategy,0,bp,0,rwflag,
+ d_addr,&len,curproc);
+#endif
+ } else {
+ /* if no data, no need to translate it.. */
+ bp->b_un.b_addr = 0;
+ bp->b_dev = -1; /* irrelevant info */
+ bp->b_flags = 0;
+
+ scsistrategy(bp);
+ ret = bp->b_error;
+ }
+ free(bp,M_TEMP);
+ if((unsigned int)screq2 < (unsigned int)0xfe000000)
+ {
+ bcopy(screq,screq2,sizeof(scsireq_t));
+ free(screq,M_TEMP);
+ }
+ break;
+ }
+#endif /* !NetBSD */
+ 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;
+ ret = 0;
+ break;
+ }
+ case SCIOCREPROBE:
+ {
+ extern int scsibus;
+ struct scsi_addr *sca = (struct scsi_addr *) addr;
+
+ ret = scsi_probe_busses(sca->scbus,sca->target,sca->lun);
+ break;
+ }
+ case SCIOCRECONFIG:
+ case SCIOCDECONFIG:
+ ret = EINVAL;
+ break;
+ 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;
+ break;
+ }
+
+ default:
+ ret = ENOTTY;
+ break;
+ }
+
+ return ret;
+}
+
+scsierr(bp,err)
+struct buf *bp;
+int err;
+{
+ bp->b_flags |= B_ERROR;
+ bp->b_error = err;
+ biodone(bp);
+ return;
+}
+
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