Real DRQ usage tracking.

5 files changed, 24 insertions, 23 deletions

diff --git a/sys/dev/isa/isa.c b/sys/dev/isa/isa.c
index 057ac452207..3d7516f46d7 100644
--- a/sys/dev/isa/isa.c
+++ b/sys/dev/isa/isa.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isa.c,v 1.23 1997/12/21 14:41:23 downsj Exp $	*/
+/*	$OpenBSD: isa.c,v 1.24 1997/12/25 12:06:47 downsj Exp $	*/
 /*	$NetBSD: isa.c,v 1.85 1996/05/14 00:31:04 thorpej Exp $	*/
 
 /*-
@@ -152,14 +152,18 @@ isascan(parent, match)
 			config_attach(parent, dev, &ia2, isaprint);
 			dev = config_make_softc(parent, cf);
 			ia2 = ia;
+
+			isa_drq_alloc(sc, ia.ia_drq);
 		}
 		free(dev, M_DEVBUF);
 		return;
 	}
 
-	if ((*cf->cf_attach->ca_match)(parent, dev, &ia) > 0)
+	if ((*cf->cf_attach->ca_match)(parent, dev, &ia) > 0) {
 		config_attach(parent, dev, &ia, isaprint);
-	else
+
+		isa_drq_alloc(sc, ia.ia_drq);
+	} else
 		free(dev, M_DEVBUF);
 }
 
diff --git a/sys/dev/isa/isadma.c b/sys/dev/isa/isadma.c
index 8d854b4b381..141323ed8c8 100644
--- a/sys/dev/isa/isadma.c
+++ b/sys/dev/isa/isadma.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isadma.c,v 1.15 1997/12/21 14:41:23 downsj Exp $	*/
+/*	$OpenBSD: isadma.c,v 1.16 1997/12/25 12:06:47 downsj Exp $	*/
 /*	$NetBSD: isadma.c,v 1.19 1996/04/29 20:03:26 christos Exp $	*/
 
 #include <sys/param.h>
@@ -128,20 +128,6 @@ isadma_release(chan)
 	di->inuse = 0;
 }
 
-int
-isadma_isdrqfree(chan)
-	int chan;
-{
-	struct dma_info *di;
-#ifdef DIAGNOSTIC
-	if (chan < 0 || chan > 7)
-		panic("isadma_release: channel out of range");
-#endif
-	di = dma_info + chan;
-
-	return (di->inuse);
-}
-
 /*
  * isadma_cascade(): program 8237 DMA controller channel to accept
  * external dma control by a board.
diff --git a/sys/dev/isa/isadmavar.h b/sys/dev/isa/isadmavar.h
index 9e424edc959..3e8a153632b 100644
--- a/sys/dev/isa/isadmavar.h
+++ b/sys/dev/isa/isadmavar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isadmavar.h,v 1.9 1997/12/21 14:41:24 downsj Exp $	*/
+/*	$OpenBSD: isadmavar.h,v 1.10 1997/12/25 12:06:48 downsj Exp $	*/
 /*	$NetBSD: isadmavar.h,v 1.4 1996/03/01 04:08:46 mycroft Exp $	*/
 
 #define	DMAMODE_WRITE	0
@@ -26,7 +26,6 @@ void isadma_copyfrombuf __P((caddr_t, vm_size_t, int, struct isadma_seg *));
 
 int isadma_acquire __P((int));
 void isadma_release __P((int));
-int isadma_isdrqfree __P((int));
 void isadma_cascade __P((int));
 void isadma_start __P((caddr_t, vm_size_t, int, int));
 void isadma_abort __P((int));
diff --git a/sys/dev/isa/isapnp.c b/sys/dev/isa/isapnp.c
index 5c888ce9f15..016d737a72d 100644
--- a/sys/dev/isa/isapnp.c
+++ b/sys/dev/isa/isapnp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isapnp.c,v 1.13 1997/12/25 09:22:38 downsj Exp $	*/
+/*	$OpenBSD: isapnp.c,v 1.14 1997/12/25 12:06:48 downsj Exp $	*/
 /*	$NetBSD: isapnp.c,v 1.9.4.3 1997/10/29 00:40:43 thorpej Exp $	*/
 
 /*
@@ -270,7 +270,7 @@ isapnp_alloc_drq(isa, i)
 	}
 
 	for (b = 0; b < 16; b++)
-		if ((i->bits & (1 << b)) && isadma_isdrqfree(b)) {
+		if ((i->bits & (1 << b)) && isa_drq_isfree(isa, b)) {
 			i->num = b;
 			return 0;
 		}
diff --git a/sys/dev/isa/isavar.h b/sys/dev/isa/isavar.h
index dfa2b092e9c..40123a5a2b7 100644
--- a/sys/dev/isa/isavar.h
+++ b/sys/dev/isa/isavar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: isavar.h,v 1.24 1997/12/25 09:22:44 downsj Exp $	*/
+/*	$OpenBSD: isavar.h,v 1.25 1997/12/25 12:06:49 downsj Exp $	*/
 /*	$NetBSD: isavar.h,v 1.24 1996/10/21 22:41:11 thorpej Exp $	*/
 /*	$NetBSD: isapnpvar.h,v 1.5.4.2 1997/10/29 00:40:49 thorpej Exp $	*/
 
@@ -282,8 +282,20 @@ struct isa_softc {
 	 * via isa_attach_args.
 	 */
 	bus_space_handle_t   sc_delaybah;
+
+	int8_t sc_drq;		/* DRQ usage tracking */
 };
 
+/*
+ * Macros for sc_drq access.
+ */
+#define isa_drq_alloc(_sc, _drq)	\
+	(((struct isa_softc *)(_sc))->sc_drq |= (1 << (_drq)))
+#define isa_drq_free(_sc, _drq)		\
+	(((struct isa_softc *)(_sc))->sc_drq &= ~(1 << (_drq)))
+#define isa_drq_isfree(_sc, _drq)	\
+	!((((struct isa_softc *)(_sc))->sc_drq << (_drq)) & 1)
+
 #define		cf_iobase		cf_loc[0]
 #define		cf_iosize		cf_loc[1]
 #define		cf_maddr		cf_loc[2]