Kernel support for vblank syncing on Rage 128 and Matrox.

15 files changed, 327 insertions, 11 deletions

diff --git a/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/Imakefile b/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/Imakefile
index 0e92b13f8..fddf8f536 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/Imakefile
+++ b/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/Imakefile
@@ -24,6 +24,7 @@ LinkSourceFile(mga.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_dma.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_drm.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_drv.h,$(XF86OSSRC)/shared/drm/kernel)
+LinkSourceFile(mga_irq.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_state.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_ucode.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_warp.c,$(XF86OSSRC)/shared/drm/kernel)
@@ -31,6 +32,7 @@ LinkSourceFile(r128.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(r128_cce.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(r128_drm.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(r128_drv.h,$(XF86OSSRC)/shared/drm/kernel)
+LinkSourceFile(r128_irq.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(r128_state.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(radeon.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(radeon_cp.c,$(XF86OSSRC)/shared/drm/kernel)
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/mga/Makefile b/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/mga/Makefile
index 13e43c466..a280e0248 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/mga/Makefile
+++ b/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/mga/Makefile
@@ -3,7 +3,7 @@
 .PATH:	${.CURDIR}/..
 KMOD= 	mga
 NOMAN=	YES
-SRCS=		mga_drv.c mga_state.c mga_warp.c mga_dma.c
+SRCS=		mga_drv.c mga_state.c mga_warp.c mga_dma.c mga_irq.c
 SRCS+=	device_if.h bus_if.h pci_if.h opt_drm.h
 CFLAGS+=	${DEBUG_FLAGS} -I. -I..
 
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/r128/Makefile b/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/r128/Makefile
index 83f784826..2d2e7e4fe 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/r128/Makefile
+++ b/xc/programs/Xserver/hw/xfree86/os-support/bsd/drm/kernel/r128/Makefile
@@ -3,7 +3,7 @@
 .PATH:	${.CURDIR}/..
 KMOD	= r128
 NOMAN=	YES
-SRCS    = r128_cce.c r128_drv.c r128_state.c
+SRCS    = r128_cce.c r128_drv.c r128_state.c r128_irq.c
 SRCS   += device_if.h bus_if.h pci_if.h opt_drm.h
 CFLAGS += ${DEBUG_FLAGS} -I. -I..
 
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Imakefile b/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Imakefile
index 59d59378c..7255d6506 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Imakefile
+++ b/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Imakefile
@@ -23,6 +23,7 @@ LinkSourceFile(mga.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_dma.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_drm.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_drv.h,$(XF86OSSRC)/shared/drm/kernel)
+LinkSourceFile(mga_irq.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_state.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_ucode.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(mga_warp.c,$(XF86OSSRC)/shared/drm/kernel)
@@ -30,6 +31,7 @@ LinkSourceFile(r128.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(r128_cce.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(r128_drm.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(r128_drv.h,$(XF86OSSRC)/shared/drm/kernel)
+LinkSourceFile(r128_irq.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(r128_state.c,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(radeon.h,$(XF86OSSRC)/shared/drm/kernel)
 LinkSourceFile(radeon_cp.c,$(XF86OSSRC)/shared/drm/kernel)
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Makefile.linux b/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Makefile.linux
index a498ed8c3..4505e6c11 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Makefile.linux
+++ b/xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Makefile.linux
@@ -52,7 +52,7 @@ GAMMAHEADERS =	gamma_drv.h $(DRMHEADERS) $(DRMTEMPLATES)
 TDFXOBJS =	tdfx_drv.o
 TDFXHEADERS =	tdfx.h $(DRMHEADERS) $(DRMTEMPLATES)
 
-R128OBJS =	r128_drv.o r128_cce.o r128_state.o
+R128OBJS =	r128_drv.o r128_cce.o r128_state.o r128_irq.o
 R128HEADERS =	r128.h r128_drv.h r128_drm.h $(DRMHEADERS) $(DRMTEMPLATES)
 
 RADEONOBJS =	radeon_drv.o radeon_cp.o radeon_state.o radeon_mem.o radeon_irq.o
@@ -158,7 +158,7 @@ MODS += i810.o
 MODS += i830.o
 endif
 
-MGAOBJS =	mga_drv.o mga_dma.o mga_state.o mga_warp.o
+MGAOBJS =	mga_drv.o mga_dma.o mga_state.o mga_warp.o mga_irq.o
 MGAHEADERS =	mga.h mga_drv.h mga_drm.h $(DRMHEADERS) $(DRMTEMPLATES)
 
 I810OBJS =	i810_drv.o i810_dma.o
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga.h b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga.h
index 5380cb0dc..49530442b 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga.h
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga.h
@@ -45,11 +45,11 @@
 
 #define DRIVER_NAME		"mga"
 #define DRIVER_DESC		"Matrox G200/G400"
-#define DRIVER_DATE		"20010321"
+#define DRIVER_DATE		"20021029"
 
 #define DRIVER_MAJOR		3
-#define DRIVER_MINOR		0
-#define DRIVER_PATCHLEVEL	2
+#define DRIVER_MINOR		1
+#define DRIVER_PATCHLEVEL	0
 
 #define DRIVER_IOCTLS							   \
 	[DRM_IOCTL_NR(DRM_IOCTL_DMA)]	      = { mga_dma_buffers, 1, 0 }, \
@@ -61,7 +61,8 @@
 	[DRM_IOCTL_NR(DRM_IOCTL_MGA_VERTEX)]  = { mga_dma_vertex,  1, 0 }, \
 	[DRM_IOCTL_NR(DRM_IOCTL_MGA_INDICES)] = { mga_dma_indices, 1, 0 }, \
 	[DRM_IOCTL_NR(DRM_IOCTL_MGA_ILOAD)]   = { mga_dma_iload,   1, 0 }, \
-	[DRM_IOCTL_NR(DRM_IOCTL_MGA_BLIT)]    = { mga_dma_blit,    1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MGA_BLIT)]    = { mga_dma_blit,    1, 0 }, \
+	[DRM_IOCTL_NR(DRM_IOCTL_MGA_GETPARAM)]= { mga_getparam,    1, 0 },
 
 #define __HAVE_COUNTERS         3
 #define __HAVE_COUNTER6         _DRM_STAT_IRQ
@@ -77,6 +78,9 @@
 /* DMA customization:
  */
 #define __HAVE_DMA		1
+#define __HAVE_DMA_IRQ		1
+#define __HAVE_VBL_IRQ		1
+#define __HAVE_SHARED_IRQ       1
 
 #define __HAVE_DMA_QUIESCENT	1
 #define DRIVER_DMA_QUIESCENT() do {					\
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_drm.h b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_drm.h
index c259814d6..b19bc0113 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_drm.h
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_drm.h
@@ -239,6 +239,7 @@ typedef struct _drm_mga_sarea {
 #define DRM_IOCTL_MGA_INDICES		DRM_IOW( 0x46, drm_mga_indices_t)
 #define DRM_IOCTL_MGA_ILOAD		DRM_IOW( 0x47, drm_mga_iload_t)
 #define DRM_IOCTL_MGA_BLIT		DRM_IOW( 0x48, drm_mga_blit_t)
+#define DRM_IOCTL_MGA_GETPARAM		DRM_IOWR(0x49, drm_mga_getparam_t)
 
 typedef struct _drm_mga_warp_index {
    	int installed;
@@ -322,4 +323,14 @@ typedef struct _drm_mga_blit {
 	int source_pitch, dest_pitch;
 } drm_mga_blit_t;
 
+/* 3.1: An ioctl to get parameters that aren't available to the 3d
+ * client any other way.  
+ */
+#define MGA_PARAM_IRQ_NR            1
+
+typedef struct drm_mga_getparam {
+	int param;
+	int *value;
+} drm_mga_getparam_t;
+
 #endif
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_drv.h b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_drv.h
index b5f16ae26..a5085b061 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_drv.h
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_drv.h
@@ -125,6 +125,7 @@ extern int  mga_dma_vertex( DRM_IOCTL_ARGS );
 extern int  mga_dma_indices( DRM_IOCTL_ARGS );
 extern int  mga_dma_iload( DRM_IOCTL_ARGS );
 extern int  mga_dma_blit( DRM_IOCTL_ARGS );
+extern int  mga_getparam( DRM_IOCTL_ARGS );
 
 				/* mga_warp.c */
 extern int mga_warp_install_microcode( drm_mga_private_t *dev_priv );
@@ -141,6 +142,7 @@ extern int mga_warp_init( drm_mga_private_t *dev_priv );
 
 #ifdef __alpha__
 #define MGA_READ( reg )		(_MGA_READ((u32 *)MGA_ADDR(reg)))
+#define MGA_READ8( reg )	(_MGA_READ((u8 *)MGA_ADDR(reg)))
 #define MGA_WRITE( reg, val )	do { DRM_WRITEMEMORYBARRIER(); MGA_DEREF( reg ) = val; } while (0)
 #define MGA_WRITE8( reg, val )  do { DRM_WRITEMEMORYBARRIER(); MGA_DEREF8( reg ) = val; } while (0)
 
@@ -152,6 +154,7 @@ static inline u32 _MGA_READ(u32 *addr)
 
 #else
 #define MGA_READ( reg )		MGA_DEREF( reg )
+#define MGA_READ8( reg )	MGA_DEREF8( reg )
 #define MGA_WRITE( reg, val )	do { MGA_DEREF( reg ) = val; } while (0)
 #define MGA_WRITE8( reg, val )  do { MGA_DEREF8( reg ) = val; } while (0)
 #endif
@@ -345,6 +348,11 @@ do {									\
 /* A reduced set of the mga registers.
  */
 #define MGA_CRTC_INDEX			0x1fd4
+#define MGA_CRTC_DATA			0x1fd5
+
+/* CRTC11 */
+#define MGA_VINTCLR			(1 << 4)
+#define MGA_VINTEN			(1 << 5)
 
 #define MGA_ALPHACTRL 			0x2c7c
 #define MGA_AR0 			0x1c60
@@ -416,8 +424,10 @@ do {									\
 
 #define MGA_ICLEAR 			0x1e18
 #	define MGA_SOFTRAPICLR			(1 << 0)
+#	define MGA_VLINEICLR			(1 << 5)
 #define MGA_IEN 			0x1e1c
 #	define MGA_SOFTRAPIEN			(1 << 0)
+#	define MGA_VLINEIEN			(1 << 5)
 
 #define MGA_LEN 			0x1c5c
 
@@ -456,6 +466,8 @@ do {									\
 #	define MGA_SRCACC_AGP			(1 << 1)
 #define MGA_STATUS 			0x1e14
 #	define MGA_SOFTRAPEN			(1 << 0)
+#	define MGA_VSYNCPEN			(1 << 4)
+#	define MGA_VLINEPEN			(1 << 5)
 #	define MGA_DWGENGSTS			(1 << 16)
 #	define MGA_ENDPRDMASTS			(1 << 17)
 #define MGA_STENCIL			0x2cc8
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_irq.c b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_irq.c
new file mode 100644
index 000000000..568d193ff
--- /dev/null
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_irq.c
@@ -0,0 +1,99 @@
+/* mga_irq.c -- IRQ handling for radeon -*- linux-c -*-
+ *
+ * Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
+ * 
+ * The Weather Channel (TM) funded Tungsten Graphics to develop the
+ * initial release of the Radeon 8500 driver under the XFree86 license.
+ * This notice must be preserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ *    Eric Anholt <anholt@FreeBSD.org>
+ */
+
+#include "mga.h"
+#include "drmP.h"
+#include "drm.h"
+#include "mga_drm.h"
+#include "mga_drv.h"
+
+void mga_dma_service( DRM_IRQ_ARGS )
+{
+	drm_device_t *dev = (drm_device_t *) arg;
+	drm_mga_private_t *dev_priv = 
+	   (drm_mga_private_t *)dev->dev_private;
+	int status;
+
+	status = MGA_READ( MGA_STATUS );
+	
+	/* VBLANK interrupt */
+	if ( status & MGA_VLINEPEN ) {
+		MGA_WRITE( MGA_ICLEAR, MGA_VLINEICLR );
+		atomic_inc(&dev->vbl_received);
+		DRM_WAKEUP(&dev->vbl_queue);
+	}
+}
+
+int mga_vblank_wait(drm_device_t *dev, unsigned int *sequence)
+{
+	unsigned int cur_vblank;
+	int ret = 0;
+
+	/* Assume that the user has missed the current sequence number
+	 * by about a day rather than she wants to wait for years
+	 * using vertical blanks... 
+	 */
+	DRM_WAIT_ON( ret, dev->vbl_queue, 3*DRM_HZ, 
+		     ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) )
+			 + ~*sequence + 1 ) <= (1<<23) ) );
+
+	*sequence = cur_vblank;
+
+	return ret;
+}
+
+void mga_driver_irq_preinstall( drm_device_t *dev ) {
+  	drm_mga_private_t *dev_priv = 
+	   (drm_mga_private_t *)dev->dev_private;
+
+	/* Disable *all* interrupts */
+      	MGA_WRITE( MGA_IEN, 0 );
+	/* Clear bits if they're already high */
+   	MGA_WRITE( MGA_ICLEAR, ~0 );
+}
+
+void mga_driver_irq_postinstall( drm_device_t *dev ) {
+  	drm_mga_private_t *dev_priv = 
+	   (drm_mga_private_t *)dev->dev_private;
+
+	/* Turn on VBL interrupt */
+   	MGA_WRITE( MGA_IEN, MGA_VLINEIEN );
+}
+
+void mga_driver_irq_uninstall( drm_device_t *dev ) {
+  	drm_mga_private_t *dev_priv = 
+	   (drm_mga_private_t *)dev->dev_private;
+	if ( dev_priv ) {
+		/* Disable *all* interrupts */
+		MGA_WRITE( MGA_IEN, 0 );
+	}
+}
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_state.c b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_state.c
index 26ea3e7f7..610772200 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_state.c
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/mga_state.c
@@ -1075,3 +1075,36 @@ int mga_dma_blit( DRM_IOCTL_ARGS )
 
 	return 0;
 }
+
+int mga_getparam( DRM_IOCTL_ARGS )
+{
+	DRM_DEVICE;
+	drm_mga_private_t *dev_priv = dev->dev_private;
+	drm_mga_getparam_t param;
+	int value;
+
+	if ( !dev_priv ) {
+		DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL( param, (drm_mga_getparam_t *)data,
+			     sizeof(param) );
+
+	DRM_DEBUG( "pid=%d\n", DRM_CURRENTPID );
+
+	switch( param.param ) {
+	case MGA_PARAM_IRQ_NR:
+		value = dev->irq;
+		break;
+	default:
+		return DRM_ERR(EINVAL);
+	}
+
+	if ( DRM_COPY_TO_USER( param.value, &value, sizeof(int) ) ) {
+		DRM_ERROR( "copy_to_user\n" );
+		return DRM_ERR(EFAULT);
+	}
+	
+	return 0;
+}
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128.h b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128.h
index 472a8014f..cdf18ffbf 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128.h
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128.h
@@ -47,10 +47,10 @@
 
 #define DRIVER_NAME		"r128"
 #define DRIVER_DESC		"ATI Rage 128"
-#define DRIVER_DATE		"20010917"
+#define DRIVER_DATE		"20021029"
 
 #define DRIVER_MAJOR		2
-#define DRIVER_MINOR		2
+#define DRIVER_MINOR		3
 #define DRIVER_PATCHLEVEL	0
 
 
@@ -70,7 +70,8 @@
    [DRM_IOCTL_NR(DRM_IOCTL_R128_BLIT)]       = { r128_cce_blit,     1, 0 }, \
    [DRM_IOCTL_NR(DRM_IOCTL_R128_DEPTH)]      = { r128_cce_depth,    1, 0 }, \
    [DRM_IOCTL_NR(DRM_IOCTL_R128_STIPPLE)]    = { r128_cce_stipple,  1, 0 }, \
-   [DRM_IOCTL_NR(DRM_IOCTL_R128_INDIRECT)]   = { r128_cce_indirect, 1, 1 },
+   [DRM_IOCTL_NR(DRM_IOCTL_R128_INDIRECT)]   = { r128_cce_indirect, 1, 1 }, \
+   [DRM_IOCTL_NR(DRM_IOCTL_R128_GETPARAM)]   = { r128_getparam, 1, 1 },
 
 /* Driver customization:
  */
@@ -90,6 +91,9 @@
 /* DMA customization:
  */
 #define __HAVE_DMA		1
+#define __HAVE_DMA_IRQ		1
+#define __HAVE_VBL_IRQ		1
+#define __HAVE_SHARED_IRQ       1
 
 #if 0
 /* GH: Remove this for now... */
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_drm.h b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_drm.h
index a8d230088..bbb1a93bb 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_drm.h
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_drm.h
@@ -190,6 +190,7 @@ typedef struct drm_r128_sarea {
 #define DRM_IOCTL_R128_INDIRECT		DRM_IOWR(0x4f, drm_r128_indirect_t)
 #define DRM_IOCTL_R128_FULLSCREEN	DRM_IOW( 0x50, drm_r128_fullscreen_t)
 #define DRM_IOCTL_R128_CLEAR2		DRM_IOW( 0x51, drm_r128_clear2_t)
+#define DRM_IOCTL_R128_GETPARAM		DRM_IOW( 0x52, drm_r128_getparam_t)
 
 typedef struct drm_r128_init {
 	enum {
@@ -305,4 +306,14 @@ typedef struct drm_r128_fullscreen {
 	} func;
 } drm_r128_fullscreen_t;
 
+/* 2.3: An ioctl to get parameters that aren't available to the 3d
+ * client any other way.  
+ */
+#define R128_PARAM_IRQ_NR            1
+
+typedef struct drm_r128_getparam {
+	int param;
+	int *value;
+} drm_r128_getparam_t;
+
 #endif
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_drv.h b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_drv.h
index aeb73e08d..763fcb3a5 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_drv.h
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_drv.h
@@ -124,6 +124,7 @@ extern int r128_cce_idle( DRM_IOCTL_ARGS );
 extern int r128_engine_reset( DRM_IOCTL_ARGS );
 extern int r128_fullscreen( DRM_IOCTL_ARGS );
 extern int r128_cce_buffers( DRM_IOCTL_ARGS );
+extern int r128_getparam( DRM_IOCTL_ARGS );
 
 extern void r128_freelist_reset( drm_device_t *dev );
 extern drm_buf_t *r128_freelist_get( drm_device_t *dev );
@@ -213,6 +214,11 @@ extern int r128_cce_indirect( DRM_IOCTL_ARGS );
 #define R128_DST_PITCH_OFFSET_C		0x1c80
 #	define R128_DST_TILE			(1 << 31)
 
+#define R128_GEN_INT_CNTL		0x0040
+#	define R128_CRTC_VBLANK_INT_EN		(1 <<  0)
+#define R128_GEN_INT_STATUS		0x0044
+#	define R128_CRTC_VBLANK_INT		(1 <<  0)
+#	define R128_CRTC_VBLANK_INT_AK		(1 <<  0)
 #define R128_GEN_RESET_CNTL		0x00f0
 #	define R128_SOFT_RESET_GUI		(1 <<  0)
 
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_irq.c b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_irq.c
new file mode 100644
index 000000000..a29a81b52
--- /dev/null
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_irq.c
@@ -0,0 +1,99 @@
+/* r128_irq.c -- IRQ handling for radeon -*- linux-c -*-
+ *
+ * Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
+ * 
+ * The Weather Channel (TM) funded Tungsten Graphics to develop the
+ * initial release of the Radeon 8500 driver under the XFree86 license.
+ * This notice must be preserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ *    Eric Anholt <anholt@FreeBSD.org>
+ */
+
+#include "r128.h"
+#include "drmP.h"
+#include "drm.h"
+#include "r128_drm.h"
+#include "r128_drv.h"
+
+void r128_dma_service( DRM_IRQ_ARGS )
+{
+	drm_device_t *dev = (drm_device_t *) arg;
+	drm_r128_private_t *dev_priv = 
+	   (drm_r128_private_t *)dev->dev_private;
+	int status;
+
+	status = R128_READ( R128_GEN_INT_STATUS );
+	
+	/* VBLANK interrupt */
+	if ( status & R128_CRTC_VBLANK_INT ) {
+		R128_WRITE( R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK );
+		atomic_inc(&dev->vbl_received);
+		DRM_WAKEUP(&dev->vbl_queue);
+	}
+}
+
+int DRM(vblank_wait)(drm_device_t *dev, unsigned int *sequence)
+{
+	unsigned int cur_vblank;
+	int ret = 0;
+
+	/* Assume that the user has missed the current sequence number
+	 * by about a day rather than she wants to wait for years
+	 * using vertical blanks... 
+	 */
+	DRM_WAIT_ON( ret, dev->vbl_queue, 3*DRM_HZ, 
+		     ( ( ( cur_vblank = atomic_read(&dev->vbl_received ) )
+			 + ~*sequence + 1 ) <= (1<<23) ) );
+
+	*sequence = cur_vblank;
+
+	return ret;
+}
+
+void r128_driver_irq_preinstall( drm_device_t *dev ) {
+  	drm_r128_private_t *dev_priv = 
+	   (drm_r128_private_t *)dev->dev_private;
+
+	/* Disable *all* interrupts */
+      	R128_WRITE( R128_GEN_INT_CNTL, 0 );
+	/* Clear vblank bit if it's already high */
+   	R128_WRITE( R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK );
+}
+
+void r128_driver_irq_postinstall( drm_device_t *dev ) {
+  	drm_r128_private_t *dev_priv = 
+	   (drm_r128_private_t *)dev->dev_private;
+
+	/* Turn on VBL interrupt */
+   	R128_WRITE( R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN );
+}
+
+void r128_driver_irq_uninstall( drm_device_t *dev ) {
+  	drm_r128_private_t *dev_priv = 
+	   (drm_r128_private_t *)dev->dev_private;
+	if ( dev_priv ) {
+		/* Disable *all* interrupts */
+		R128_WRITE( R128_GEN_INT_CNTL, 0 );
+	}
+}
diff --git a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_state.c b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_state.c
index 6ae586391..68f73061a 100644
--- a/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_state.c
+++ b/xc/programs/Xserver/hw/xfree86/os-support/shared/drm/kernel/r128_state.c
@@ -1564,3 +1564,36 @@ int r128_cce_indirect( DRM_IOCTL_ARGS )
 
 	return 0;
 }
+
+int r128_getparam( DRM_IOCTL_ARGS )
+{
+	DRM_DEVICE;
+	drm_r128_private_t *dev_priv = dev->dev_private;
+	drm_r128_getparam_t param;
+	int value;
+
+	if ( !dev_priv ) {
+		DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL( param, (drm_r128_getparam_t *)data,
+			     sizeof(param) );
+
+	DRM_DEBUG( "pid=%d\n", DRM_CURRENTPID );
+
+	switch( param.param ) {
+	case R128_PARAM_IRQ_NR:
+		value = dev->irq;
+		break;
+	default:
+		return DRM_ERR(EINVAL);
+	}
+
+	if ( DRM_COPY_TO_USER( param.value, &value, sizeof(int) ) ) {
+		DRM_ERROR( "copy_to_user\n" );
+		return DRM_ERR(EFAULT);
+	}
+	
+	return 0;
+}