First DRI release of 3dfx driver.

24 files changed, 6999 insertions, 0 deletions

diff --git a/linux/Makefile.kernel b/linux/Makefile.kernel
new file mode 100644
index 00000000..c286d8fd
--- /dev/null
+++ b/linux/Makefile.kernel
@@ -0,0 +1,28 @@
+#
+# Makefile for the drm device driver.  This driver provides support for
+# the Direct Rendering Infrastructure (DRI) in XFree86 4.x.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definitions are now inherited from the
+# parent makes..
+#
+# $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/Makefile.kernel,v 1.2 1999/09/27 14:59:24 dawes Exp $
+
+L_TARGET        := libdrm.a
+
+L_OBJS		:= init.o memory.o proc.o auth.o context.o drawable.o bufs.o \
+			lists.o lock.o ioctl.o fops.o vm.o dma.o
+
+M_OBJS		:= 
+
+ifdef CONFIG_DRM_GAMMA
+M_OBJS          += gamma.o
+endif
+
+include $(TOPDIR)/Rules.make
+
+gamma.o: gamma_drv.o gamma_dma.o $(L_TARGET)
+	$(LD) $(LD_RFLAG) -r -o $@ gamma_drv.o gamma_dma.o -L. -ldrm
diff --git a/linux/Makefile.linux b/linux/Makefile.linux
new file mode 100644
index 00000000..a0bdeb52
--- /dev/null
+++ b/linux/Makefile.linux
@@ -0,0 +1,136 @@
+# Makefile -- For the Direct Rendering Manager module (drm)
+# Created: Mon Jan  4 09:26:53 1999 by faith@precisioninsight.com
+# Revised: Thu Oct  7 10:56:13 1999 by faith@precisioninsight.com
+#
+# Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+# All rights reserved.
+#
+# 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.
+# 
+# $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/generic/Makefile.linux,v 1.23 1999/07/02 17:46:30 faith Exp $
+# $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/generic/Makefile.linux,v 1.3 1999/06/27 14:08:21 dawes Exp $
+# 
+
+.SUFFIXES:
+
+# **** Start of SMP/MODVERSIONS detection
+
+# *** Setup
+LINUX=/usr/src/linux
+AUTOCONF=$(LINUX)/include/linux/autoconf.h
+
+# ** SMP
+SMP := $(shell \
+         if grep -q '^\#define.*CONFIG_SMP.*1' $(AUTOCONF); \
+	 then echo 1; else echo 0; fi)
+# If that doesn't do automatic detection properly on your system,
+# uncomment one of these lines:
+#SMP := 0
+#SMP := 1
+
+# ** MODVERSIONS
+MODVERSIONS := $(shell \
+		 if grep -q '^\#define.*CONFIG_MODVERSIONS.*1' $(AUTOCONF); \
+		 then echo 1; else echo 0; fi)
+# If that doesn't do automatic detection properly on your system,
+# uncomment one of these lines:
+#MODVERSIONS := 0
+#MODVERSIONS := 1
+
+# **** End of SMP/MODVERSIONS detection
+
+MODS=           gamma.o tdfx.o
+LIBS=           libdrm.a
+PROGS=		drmstat
+
+DRMOBJS=	init.o memory.o proc.o auth.o context.o drawable.o bufs.o \
+		lists.o lock.o ioctl.o fops.o vm.o dma.o
+DRMHEADERS=	drm.h drmP.h
+
+GAMMAOBJS=      gamma_drv.o gamma_dma.o
+GAMMAHEADERS=   gamma_drv.h $(DRMHEADERS)
+
+TDFXOBJS=       tdfx_drv.o tdfx_context.o
+TDFXHEADERS=    tdfx_drv.h $(DRMHEADERS)
+
+PROGOBJS=       drmstat.po xf86drm.po xf86drmHash.po xf86drmRandom.po sigio.po
+PROGHEADERS=    xf86drm.h $(DRMHEADERS)
+
+INC=		/usr/include
+
+CFLAGS=		-O2 $(WARNINGS)
+WARNINGS=	-Wall -Wwrite-strings -Wpointer-arith -Wcast-align \
+		-Wstrict-prototypes -Wshadow -Wnested-externs \
+		-Winline -Wpointer-arith
+MODCFLAGS=      $(CFLAGS) -D__KERNEL__ -DMODULE -fomit-frame-pointer
+PRGCFLAGS=      $(CFLAGS) -g -ansi -pedantic -DPOSIX_C_SOURCE=199309L \
+		-D_POSIX_SOURCE -D_XOPEN_SOURCE -D_BSD_SOURCE -D_SVID_SOURCE \
+		-I../../../../../../include -I../../../../../../../../include \
+		-I../../../../../../../../programs/Xserver/hw/xfree86/common
+PRGLIBS=
+
+# **** Handle SMP/MODVERSIONS
+ifeq ($(SMP),1)
+MODCFLAGS += -D__SMP__
+endif
+ifeq ($(MODVERSIONS),1)
+MODCFLAGS += -DMODVERSIONS -include /usr/include/linux/modversions.h
+endif
+
+# **** End of configuration
+
+all: $(LIBS) $(MODS) $(PROGS)
+
+libdrm.a: $(DRMOBJS)
+	-$(RM) -f $@
+	$(AR) rcs $@ $(DRMOBJS)
+
+gamma.o: $(GAMMAOBJS) $(LIBS)
+	$(LD) -r $^ -o $@
+
+tdfx.o: $(TDFXOBJS) $(LIBS)
+	$(LD) -r $^ -o $@
+
+drmstat: $(PROGOBJS)
+	$(CC) $(PRGCFLAGS) $^ $(PRGLIBS) -o $@
+
+.PHONY: ChangeLog
+ChangeLog:
+	@rm -f Changelog
+	@rcs2log -i 2 -r -l \
+		| sed 's,@.*alephnull.com,@precisioninsight.com,' > ChangeLog
+
+
+# .o files are used for modules
+%.o: %.c
+	$(CC) $(MODCFLAGS) -c $< -o $@
+
+%.po: %.c
+	$(CC) $(PRGCFLAGS) -DDRM_USE_MALLOC -c $< -o $@
+
+
+$(DRMOBJS): $(DRMHEADERS)
+$(GAMMAOBJS): $(GAMMAHEADERS)
+$(TDFXOBJS): $(TDFXHEADERS)
+$(PROGOBJS): $(PROGHEADERS)
+
+clean:
+	rm -f *.o *.po *~ core $(PROGS)
+
diff --git a/linux/README.drm b/linux/README.drm
new file mode 100644
index 00000000..1cc4c277
--- /dev/null
+++ b/linux/README.drm
@@ -0,0 +1,41 @@
+
+The Direct Rendering Manager (drm) is a device-independent kernel-level
+device driver that provides support for the XFree86 Direct Rendering
+Infrastructure (DRI).
+
+The DRM supports the Direct Rendering Infrastructure (DRI) in four major
+ways:
+
+    1. The DRM provides synchronized access to the graphics hardware via
+       the use of an optimized two-tiered lock.
+
+    2. The DRM enforces the DRI security policy for access to the graphics
+       hardware by only allowing authenticated X11 clients access to
+       restricted regions of memory.
+
+    3. The DRM provides a generic DMA engine, complete with multiple
+       queues and the ability to detect the need for an OpenGL context
+       switch.
+
+    4. The DRM is extensible via the use of small device-specific modules
+       that rely extensively on the API exported by the DRM module.
+
+
+Documentation on the DRI is available from:
+    http://precisioninsight.com/piinsights.html
+
+For specific information about kernel-level support, see:
+
+    The Direct Rendering Manager, Kernel Support for the Direct Rendering
+    Infrastructure
+    http://precisioninsight.com/dr/drm.html
+
+    Hardware Locking for the Direct Rendering Infrastructure
+    http://precisioninsight.com/dr/locking.html
+
+    A Security Analysis of the Direct Rendering Infrastructure
+    http://precisioninsight.com/dr/security.html
+
+
+
+$XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/README.drm,v 1.2 1999/09/27 14:59:24 dawes Exp $
diff --git a/linux/auth.c b/linux/auth.c
new file mode 100644
index 00000000..86568195
--- /dev/null
+++ b/linux/auth.c
@@ -0,0 +1,161 @@
+/* auth.c -- IOCTLs for authentication -*- linux-c -*-
+ * Created: Tue Feb  2 08:37:54 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 11:31:48 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/auth.c,v 1.4 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/auth.c,v 1.1 1999/09/25 14:37:57 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+static int drm_hash_magic(drm_magic_t magic)
+{
+	return magic & (DRM_HASH_SIZE-1);
+}
+
+static drm_file_t *drm_find_file(drm_device_t *dev, drm_magic_t magic)
+{
+	drm_file_t	  *retval = NULL;
+	drm_magic_entry_t *pt;
+	int		  hash	  = drm_hash_magic(magic);
+
+	down(&dev->struct_sem);
+	for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
+		if (pt->priv->authenticated) continue;
+		if (pt->magic == magic) {
+			retval = pt->priv;
+			break;
+		}
+	}
+	up(&dev->struct_sem);
+	return retval;
+}
+
+int drm_add_magic(drm_device_t *dev, drm_file_t *priv, drm_magic_t magic)
+{
+	int		  hash;
+	drm_magic_entry_t *entry;
+	
+	DRM_DEBUG("%d\n", magic);
+	
+	hash	     = drm_hash_magic(magic);
+	entry	     = drm_alloc(sizeof(*entry), DRM_MEM_MAGIC);
+	if (!entry) return -ENOMEM;
+	entry->magic = magic;
+	entry->priv  = priv;
+	entry->next  = NULL;
+
+	down(&dev->struct_sem);
+	if (dev->magiclist[hash].tail) {
+		dev->magiclist[hash].tail->next = entry;
+		dev->magiclist[hash].tail	= entry;
+	} else {
+		dev->magiclist[hash].head	= entry;
+		dev->magiclist[hash].tail	= entry;
+	}
+	up(&dev->struct_sem);
+	
+	return 0;
+}
+
+int drm_remove_magic(drm_device_t *dev, drm_magic_t magic)
+{
+	drm_magic_entry_t *prev = NULL;
+	drm_magic_entry_t *pt;
+	int		  hash;
+	
+	DRM_DEBUG("%d\n", magic);
+	hash = drm_hash_magic(magic);
+	
+	down(&dev->struct_sem);
+	for (pt = dev->magiclist[hash].head; pt; prev = pt, pt = pt->next) {
+		if (pt->magic == magic) {
+			if (dev->magiclist[hash].head == pt) {
+				dev->magiclist[hash].head = pt->next;
+			}
+			if (dev->magiclist[hash].tail == pt) {
+				dev->magiclist[hash].tail = prev;
+			}
+			if (prev) {
+				prev->next = pt->next;
+			}
+			up(&dev->struct_sem);
+			return 0;
+		}
+	}
+	up(&dev->struct_sem);
+
+	drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
+	
+	return -EINVAL;
+}
+
+int drm_getmagic(struct inode *inode, struct file *filp, unsigned int cmd,
+		 unsigned long arg)
+{
+	static drm_magic_t sequence = 0;
+	static spinlock_t  lock	    = SPIN_LOCK_UNLOCKED;
+	drm_file_t	   *priv    = filp->private_data;
+	drm_device_t	   *dev	    = priv->dev;
+	drm_auth_t	   auth;
+
+				/* Find unique magic */
+	if (priv->magic) {
+		auth.magic = priv->magic;
+	} else {
+		spin_lock(&lock);
+		do {
+			if (!sequence) ++sequence; /* reserve 0 */
+			auth.magic = sequence++;
+		} while (drm_find_file(dev, auth.magic));
+		spin_unlock(&lock);
+		priv->magic = auth.magic;
+		drm_add_magic(dev, priv, auth.magic);
+	}
+	
+	DRM_DEBUG("%u\n", auth.magic);
+	copy_to_user_ret((drm_auth_t *)arg, &auth, sizeof(auth), -EFAULT);
+	return 0;
+}
+
+int drm_authmagic(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_file_t	   *priv    = filp->private_data;
+	drm_device_t	   *dev	    = priv->dev;
+	drm_auth_t	   auth;
+	drm_file_t	   *file;
+
+	copy_from_user_ret(&auth, (drm_auth_t *)arg, sizeof(auth), -EFAULT);
+	DRM_DEBUG("%u\n", auth.magic);
+	if ((file = drm_find_file(dev, auth.magic))) {
+		file->authenticated = 1;
+		drm_remove_magic(dev, auth.magic);
+		return 0;
+	}
+	return -EINVAL;
+}
diff --git a/linux/bufs.c b/linux/bufs.c
new file mode 100644
index 00000000..e9879099
--- /dev/null
+++ b/linux/bufs.c
@@ -0,0 +1,527 @@
+/* bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
+ * Created: Tue Feb  2 08:37:54 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 22:48:10 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/bufs.c,v 1.8 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/bufs.c,v 1.1 1999/09/25 14:37:57 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+#include "linux/un.h"
+
+				/* Compute order.  Can be made faster. */
+int drm_order(unsigned long size)
+{
+	int	      order;
+	unsigned long tmp;
+
+	for (order = 0, tmp = size; tmp >>= 1; ++order);
+	if (size & ~(1 << order)) ++order;
+	return order;
+}
+
+int drm_addmap(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_map_t	*map;
+	
+	if (!(filp->f_mode & 3)) return -EACCES; /* Require read/write */
+
+	map	     = drm_alloc(sizeof(*map), DRM_MEM_MAPS);
+	if (!map) return -ENOMEM;
+	if (copy_from_user(map, (drm_map_t *)arg, sizeof(*map))) {
+		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+		return -EFAULT;
+	}
+
+	DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n",
+		  map->offset, map->size, map->type);
+	if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
+		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+		return -EINVAL;
+	}
+	map->mtrr   = -1;
+	map->handle = 0;
+
+	switch (map->type) {
+	case _DRM_REGISTERS:
+	case _DRM_FRAME_BUFFER:	
+		if (map->offset + map->size < map->offset
+		    || map->offset < virt_to_phys(high_memory)) {
+			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+			return -EINVAL;
+		}
+#ifdef CONFIG_MTRR
+		if (map->type == _DRM_FRAME_BUFFER
+		    || (map->flags & _DRM_WRITE_COMBINING)) {
+			map->mtrr = mtrr_add(map->offset, map->size,
+					     MTRR_TYPE_WRCOMB, 1);
+		}
+#endif
+		map->handle = drm_ioremap(map->offset, map->size);
+		break;
+			
+
+	case _DRM_SHM:
+		DRM_DEBUG("%ld %d\n", map->size, drm_order(map->size));
+		map->handle = (void *)drm_alloc_pages(drm_order(map->size)
+						      - PAGE_SHIFT,
+						      DRM_MEM_SAREA);
+		if (!map->handle) {
+			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+			return -ENOMEM;
+		}
+		map->offset = (unsigned long)map->handle;
+		if (map->flags & _DRM_CONTAINS_LOCK) {
+			dev->lock.hw_lock = map->handle; /* Pointer to lock */
+		}
+		break;
+	default:
+		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+		return -EINVAL;
+	}
+
+	down(&dev->struct_sem);
+	if (dev->maplist) {
+		++dev->map_count;
+		dev->maplist = drm_realloc(dev->maplist,
+					   (dev->map_count-1)
+					   * sizeof(*dev->maplist),
+					   dev->map_count
+					   * sizeof(*dev->maplist),
+					   DRM_MEM_MAPS);
+	} else {
+		dev->map_count = 1;
+		dev->maplist = drm_alloc(dev->map_count*sizeof(*dev->maplist),
+					 DRM_MEM_MAPS);
+	}
+	dev->maplist[dev->map_count-1] = map;
+	up(&dev->struct_sem);
+
+	copy_to_user_ret((drm_map_t *)arg, map, sizeof(*map), -EFAULT);
+	if (map->type != _DRM_SHM) {
+		copy_to_user_ret(&((drm_map_t *)arg)->handle,
+				 &map->offset,
+				 sizeof(map->offset),
+				 -EFAULT);
+	}		
+	return 0;
+}
+
+int drm_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_device_dma_t *dma	 = dev->dma;
+	drm_buf_desc_t	 request;
+	int		 count;
+	int		 order;
+	int		 size;
+	int		 total;
+	int		 page_order;
+	drm_buf_entry_t	 *entry;
+	unsigned long	 page;
+	drm_buf_t	 *buf;
+	int		 alignment;
+	unsigned long	 offset;
+	int		 i;
+	int		 byte_count;
+	int		 page_count;
+
+	if (!dma) return -EINVAL;
+
+	copy_from_user_ret(&request,
+			   (drm_buf_desc_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	count	   = request.count;
+	order	   = drm_order(request.size);
+	size	   = 1 << order;
+	
+	DRM_DEBUG("count = %d, size = %d (%d), order = %d, queue_count = %d\n",
+		  request.count, request.size, size, order, dev->queue_count);
+
+	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
+	if (dev->queue_count) return -EBUSY; /* Not while in use */
+
+	alignment  = (request.flags & DRM_PAGE_ALIGN) ? PAGE_ALIGN(size) :size;
+	page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
+	total	   = PAGE_SIZE << page_order;
+
+	spin_lock(&dev->count_lock);
+	if (dev->buf_use) {
+		spin_unlock(&dev->count_lock);
+		return -EBUSY;
+	}
+	atomic_inc(&dev->buf_alloc);
+	spin_unlock(&dev->count_lock);
+	
+	down(&dev->struct_sem);
+	entry = &dma->bufs[order];
+	if (entry->buf_count) {
+		up(&dev->struct_sem);
+		atomic_dec(&dev->buf_alloc);
+		return -ENOMEM;	/* May only call once for each order */
+	}
+	
+	entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
+				   DRM_MEM_BUFS);
+	if (!entry->buflist) {
+		up(&dev->struct_sem);
+		atomic_dec(&dev->buf_alloc);
+		return -ENOMEM;
+	}
+	memset(entry->buflist, 0, count * sizeof(*entry->buflist));
+
+	entry->seglist = drm_alloc(count * sizeof(*entry->seglist),
+				   DRM_MEM_SEGS);
+	if (!entry->seglist) {
+		drm_free(entry->buflist,
+			 count * sizeof(*entry->buflist),
+			 DRM_MEM_BUFS);
+		up(&dev->struct_sem);
+		atomic_dec(&dev->buf_alloc);
+		return -ENOMEM;
+	}
+	memset(entry->seglist, 0, count * sizeof(*entry->seglist));
+
+	dma->pagelist = drm_realloc(dma->pagelist,
+				    dma->page_count * sizeof(*dma->pagelist),
+				    (dma->page_count + (count << page_order))
+				    * sizeof(*dma->pagelist),
+				    DRM_MEM_PAGES);
+	DRM_DEBUG("pagelist: %d entries\n",
+		  dma->page_count + (count << page_order));
+
+
+	entry->buf_size	  = size;
+	entry->page_order = page_order;
+	byte_count	  = 0;
+	page_count	  = 0;
+	while (entry->buf_count < count) {
+		if (!(page = drm_alloc_pages(page_order, DRM_MEM_DMA))) break;
+		entry->seglist[entry->seg_count++] = page;
+		for (i = 0; i < (1 << page_order); i++) {
+			DRM_DEBUG("page %d @ 0x%08lx\n",
+				  dma->page_count + page_count,
+				  page + PAGE_SIZE * i);
+			dma->pagelist[dma->page_count + page_count++]
+				= page + PAGE_SIZE * i;
+		}
+		for (offset = 0;
+		     offset + size <= total && entry->buf_count < count;
+		     offset += alignment, ++entry->buf_count) {
+			buf	     = &entry->buflist[entry->buf_count];
+			buf->idx     = dma->buf_count + entry->buf_count;
+			buf->total   = alignment;
+			buf->order   = order;
+			buf->used    = 0;
+			buf->offset  = (dma->byte_count + byte_count + offset);
+			buf->address = (void *)(page + offset);
+			buf->next    = NULL;
+			buf->waiting = 0;
+			buf->pending = 0;
+			init_waitqueue_head(&buf->dma_wait);
+			buf->pid     = 0;
+#if DRM_DMA_HISTOGRAM
+			buf->time_queued     = 0;
+			buf->time_dispatched = 0;
+			buf->time_completed  = 0;
+			buf->time_freed	     = 0;
+#endif
+			DRM_DEBUG("buffer %d @ %p\n",
+				  entry->buf_count, buf->address);
+		}
+		byte_count += PAGE_SIZE << page_order;
+	}
+
+	dma->buflist = drm_realloc(dma->buflist,
+				   dma->buf_count * sizeof(*dma->buflist),
+				   (dma->buf_count + entry->buf_count)
+				   * sizeof(*dma->buflist),
+				   DRM_MEM_BUFS);
+	for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
+		dma->buflist[i] = &entry->buflist[i - dma->buf_count];
+
+	dma->buf_count	+= entry->buf_count;
+	dma->seg_count	+= entry->seg_count;
+	dma->page_count += entry->seg_count << page_order;
+	dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
+	
+	drm_freelist_create(&entry->freelist, entry->buf_count);
+	for (i = 0; i < entry->buf_count; i++) {
+		drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
+	}
+	
+	up(&dev->struct_sem);
+
+	request.count = entry->buf_count;
+	request.size  = size;
+
+	copy_to_user_ret((drm_buf_desc_t *)arg,
+			 &request,
+			 sizeof(request),
+			 -EFAULT);
+	
+	atomic_dec(&dev->buf_alloc);
+	return 0;
+}
+
+int drm_infobufs(struct inode *inode, struct file *filp, unsigned int cmd,
+		 unsigned long arg)
+{
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_device_dma_t *dma	 = dev->dma;
+	drm_buf_info_t	 request;
+	int		 i;
+	int		 count;
+
+	if (!dma) return -EINVAL;
+
+	spin_lock(&dev->count_lock);
+	if (atomic_read(&dev->buf_alloc)) {
+		spin_unlock(&dev->count_lock);
+		return -EBUSY;
+	}
+	++dev->buf_use;		/* Can't allocate more after this call */
+	spin_unlock(&dev->count_lock);
+
+	copy_from_user_ret(&request,
+			   (drm_buf_info_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
+		if (dma->bufs[i].buf_count) ++count;
+	}
+	
+	DRM_DEBUG("count = %d\n", count);
+	
+	if (request.count >= count) {
+		for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
+			if (dma->bufs[i].buf_count) {
+				copy_to_user_ret(&request.list[count].count,
+						 &dma->bufs[i].buf_count,
+						 sizeof(dma->bufs[0]
+							.buf_count),
+						 -EFAULT);
+				copy_to_user_ret(&request.list[count].size,
+						 &dma->bufs[i].buf_size,
+						 sizeof(dma->bufs[0].buf_size),
+						 -EFAULT);
+				copy_to_user_ret(&request.list[count].low_mark,
+						 &dma->bufs[i]
+						 .freelist.low_mark,
+						 sizeof(dma->bufs[0]
+							.freelist.low_mark),
+						 -EFAULT);
+				copy_to_user_ret(&request.list[count]
+						 .high_mark,
+						 &dma->bufs[i]
+						 .freelist.high_mark,
+						 sizeof(dma->bufs[0]
+							.freelist.high_mark),
+						 -EFAULT);
+				DRM_DEBUG("%d %d %d %d %d\n",
+					  i,
+					  dma->bufs[i].buf_count,
+					  dma->bufs[i].buf_size,
+					  dma->bufs[i].freelist.low_mark,
+					  dma->bufs[i].freelist.high_mark);
+				++count;
+			}
+		}
+	}
+	request.count = count;
+
+	copy_to_user_ret((drm_buf_info_t *)arg,
+			 &request,
+			 sizeof(request),
+			 -EFAULT);
+	
+	return 0;
+}
+
+int drm_markbufs(struct inode *inode, struct file *filp, unsigned int cmd,
+		 unsigned long arg)
+{
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_device_dma_t *dma	 = dev->dma;
+	drm_buf_desc_t	 request;
+	int		 order;
+	drm_buf_entry_t	 *entry;
+
+	if (!dma) return -EINVAL;
+
+	copy_from_user_ret(&request,
+			   (drm_buf_desc_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	DRM_DEBUG("%d, %d, %d\n",
+		  request.size, request.low_mark, request.high_mark);
+	order = drm_order(request.size);
+	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
+	entry = &dma->bufs[order];
+
+	if (request.low_mark < 0 || request.low_mark > entry->buf_count)
+		return -EINVAL;
+	if (request.high_mark < 0 || request.high_mark > entry->buf_count)
+		return -EINVAL;
+
+	entry->freelist.low_mark  = request.low_mark;
+	entry->freelist.high_mark = request.high_mark;
+	
+	return 0;
+}
+
+int drm_freebufs(struct inode *inode, struct file *filp, unsigned int cmd,
+		 unsigned long arg)
+{
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_device_dma_t *dma	 = dev->dma;
+	drm_buf_free_t	 request;
+	int		 i;
+	int		 idx;
+	drm_buf_t	 *buf;
+
+	if (!dma) return -EINVAL;
+
+	copy_from_user_ret(&request,
+			   (drm_buf_free_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	DRM_DEBUG("%d\n", request.count);
+	for (i = 0; i < request.count; i++) {
+		copy_from_user_ret(&idx,
+				   &request.list[i],
+				   sizeof(idx),
+				   -EFAULT);
+		if (idx < 0 || idx >= dma->buf_count) {
+			DRM_ERROR("Index %d (of %d max)\n",
+				  idx, dma->buf_count - 1);
+			return -EINVAL;
+		}
+		buf = dma->buflist[idx];
+		if (buf->pid != current->pid) {
+			DRM_ERROR("Process %d freeing buffer owned by %d\n",
+				  current->pid, buf->pid);
+			return -EINVAL;
+		}
+		drm_free_buffer(dev, buf);
+	}
+	
+	return 0;
+}
+
+int drm_mapbufs(struct inode *inode, struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_device_dma_t *dma	 = dev->dma;
+	int		 retcode = 0;
+	const int	 zero	 = 0;
+	unsigned long	 virtual;
+	unsigned long	 address;
+	drm_buf_map_t	 request;
+	int		 i;
+
+	if (!dma) return -EINVAL;
+	
+	DRM_DEBUG("\n");
+
+	spin_lock(&dev->count_lock);
+	if (atomic_read(&dev->buf_alloc)) {
+		spin_unlock(&dev->count_lock);
+		return -EBUSY;
+	}
+	++dev->buf_use;		/* Can't allocate more after this call */
+	spin_unlock(&dev->count_lock);
+
+	copy_from_user_ret(&request,
+			   (drm_buf_map_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	if (request.count >= dma->buf_count) {
+		virtual = do_mmap(filp, 0, dma->byte_count,
+				  PROT_READ|PROT_WRITE, MAP_SHARED, 0);
+		if (virtual > -1024UL) {
+				/* Real error */
+			retcode = (signed long)virtual;
+			goto done;
+		}
+		request.virtual = (void *)virtual;
+
+		for (i = 0; i < dma->buf_count; i++) {
+			if (copy_to_user(&request.list[i].idx,
+					 &dma->buflist[i]->idx,
+					 sizeof(request.list[0].idx))) {
+				retcode = -EFAULT;
+				goto done;
+			}
+			if (copy_to_user(&request.list[i].total,
+					 &dma->buflist[i]->total,
+					 sizeof(request.list[0].total))) {
+				retcode = -EFAULT;
+				goto done;
+			}
+			if (copy_to_user(&request.list[i].used,
+					 &zero,
+					 sizeof(zero))) {
+				retcode = -EFAULT;
+				goto done;
+			}
+			address = virtual + dma->buflist[i]->offset;
+			if (copy_to_user(&request.list[i].address,
+					 &address,
+					 sizeof(address))) {
+				retcode = -EFAULT;
+				goto done;
+			}
+		}
+	}
+done:
+	request.count = dma->buf_count;
+	DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
+
+	copy_to_user_ret((drm_buf_map_t *)arg,
+			 &request,
+			 sizeof(request),
+			 -EFAULT);
+
+	return retcode;
+}
diff --git a/linux/context.c b/linux/context.c
new file mode 100644
index 00000000..d7f8bdf2
--- /dev/null
+++ b/linux/context.c
@@ -0,0 +1,308 @@
+/* context.c -- IOCTLs for contexts and DMA queues -*- linux-c -*-
+ * Created: Tue Feb  2 08:37:54 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 11:32:09 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/context.c,v 1.5 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/context.c,v 1.1 1999/09/25 14:37:58 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+static int drm_init_queue(drm_device_t *dev, drm_queue_t *q, drm_ctx_t *ctx)
+{
+	DRM_DEBUG("\n");
+	
+	if (atomic_read(&q->use_count) != 1
+	    || atomic_read(&q->finalization)
+	    || atomic_read(&q->block_count)) {
+		DRM_ERROR("New queue is already in use: u%d f%d b%d\n",
+			  atomic_read(&q->use_count),
+			  atomic_read(&q->finalization),
+			  atomic_read(&q->block_count));
+	}
+		  
+	atomic_set(&q->finalization,  0);
+	atomic_set(&q->block_count,   0);
+	atomic_set(&q->block_read,    0);
+	atomic_set(&q->block_write,   0);
+	atomic_set(&q->total_queued,  0);
+	atomic_set(&q->total_flushed, 0);
+	atomic_set(&q->total_locks,   0);
+
+	init_waitqueue_head(&q->write_queue);
+	init_waitqueue_head(&q->read_queue);
+	init_waitqueue_head(&q->flush_queue);
+
+	q->flags = ctx->flags;
+
+	drm_waitlist_create(&q->waitlist, dev->dma->buf_count);
+
+	return 0;
+}
+
+
+/* drm_alloc_queue:
+PRE: 1) dev->queuelist[0..dev->queue_count] is allocated and will not
+	disappear (so all deallocation must be done after IOCTLs are off)
+     2) dev->queue_count < dev->queue_slots
+     3) dev->queuelist[i].use_count == 0 and
+	dev->queuelist[i].finalization == 0 if i not in use 
+POST: 1) dev->queuelist[i].use_count == 1
+      2) dev->queue_count < dev->queue_slots */
+		
+static int drm_alloc_queue(drm_device_t *dev)
+{
+	int	    i;
+	drm_queue_t *queue;
+	int	    oldslots;
+	int	    newslots;
+				/* Check for a free queue */
+	for (i = 0; i < dev->queue_count; i++) {
+		atomic_inc(&dev->queuelist[i]->use_count);
+		if (atomic_read(&dev->queuelist[i]->use_count) == 1
+		    && !atomic_read(&dev->queuelist[i]->finalization)) {
+			DRM_DEBUG("%d (free)\n", i);
+			return i;
+		}
+		atomic_dec(&dev->queuelist[i]->use_count);
+	}
+				/* Allocate a new queue */
+	down(&dev->struct_sem);
+	
+	queue = drm_alloc(sizeof(*queue), DRM_MEM_QUEUES);
+	memset(queue, 0, sizeof(*queue));
+	atomic_set(&queue->use_count, 1);
+	
+	++dev->queue_count;
+	if (dev->queue_count >= dev->queue_slots) {
+		oldslots = dev->queue_slots * sizeof(*dev->queuelist);
+		if (!dev->queue_slots) dev->queue_slots = 1;
+		dev->queue_slots *= 2;
+		newslots = dev->queue_slots * sizeof(*dev->queuelist);
+
+		dev->queuelist = drm_realloc(dev->queuelist,
+					     oldslots,
+					     newslots,
+					     DRM_MEM_QUEUES);
+		if (!dev->queuelist) {
+			up(&dev->struct_sem);
+			DRM_DEBUG("out of memory\n");
+			return -ENOMEM;
+		}
+	}
+	dev->queuelist[dev->queue_count-1] = queue;
+	
+	up(&dev->struct_sem);
+	DRM_DEBUG("%d (new)\n", dev->queue_count - 1);
+	return dev->queue_count - 1;
+}
+
+int drm_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_ctx_res_t	res;
+	drm_ctx_t	ctx;
+	int		i;
+
+	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
+	copy_from_user_ret(&res, (drm_ctx_res_t *)arg, sizeof(res), -EFAULT);
+	if (res.count >= DRM_RESERVED_CONTEXTS) {
+		memset(&ctx, 0, sizeof(ctx));
+		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
+			ctx.handle = i;
+			copy_to_user_ret(&res.contexts[i],
+					 &i,
+					 sizeof(i),
+					 -EFAULT);
+		}
+	}
+	res.count = DRM_RESERVED_CONTEXTS;
+	copy_to_user_ret((drm_ctx_res_t *)arg, &res, sizeof(res), -EFAULT);
+	return 0;
+}
+
+
+int drm_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if ((ctx.handle = drm_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
+				/* Init kernel's context and get a new one. */
+		drm_init_queue(dev, dev->queuelist[ctx.handle], &ctx);
+		ctx.handle = drm_alloc_queue(dev);
+	}
+	drm_init_queue(dev, dev->queuelist[ctx.handle], &ctx);
+	DRM_DEBUG("%d\n", ctx.handle);
+	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	return 0;
+}
+
+int drm_modctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+	drm_queue_t	*q;
+		
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	
+	DRM_DEBUG("%d\n", ctx.handle);
+	
+	if (ctx.handle < 0 || ctx.handle >= dev->queue_count) return -EINVAL;
+	q = dev->queuelist[ctx.handle];
+	
+	atomic_inc(&q->use_count);
+	if (atomic_read(&q->use_count) == 1) {
+				/* No longer in use */
+		atomic_dec(&q->use_count);
+		return -EINVAL;
+	}
+
+	if (DRM_BUFCOUNT(&q->waitlist)) {
+		atomic_dec(&q->use_count);
+		return -EBUSY;
+	}
+	
+	q->flags = ctx.flags;
+	
+	atomic_dec(&q->use_count);
+	return 0;
+}
+
+int drm_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+	drm_queue_t	*q;
+		
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	
+	DRM_DEBUG("%d\n", ctx.handle);
+	
+	if (ctx.handle >= dev->queue_count) return -EINVAL;
+	q = dev->queuelist[ctx.handle];
+	
+	atomic_inc(&q->use_count);
+	if (atomic_read(&q->use_count) == 1) {
+				/* No longer in use */
+		atomic_dec(&q->use_count);
+		return -EINVAL;
+	}
+	
+	ctx.flags = q->flags;
+	atomic_dec(&q->use_count);
+	
+	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	
+	return 0;
+}
+
+int drm_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	DRM_DEBUG("%d\n", ctx.handle);
+	return drm_context_switch(dev, dev->last_context, ctx.handle);
+}
+
+int drm_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	DRM_DEBUG("%d\n", ctx.handle);
+	drm_context_switch_complete(dev, ctx.handle);
+
+	return 0;
+}
+
+int drm_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	      unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+	drm_queue_t	*q;
+	drm_buf_t	*buf;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	DRM_DEBUG("%d\n", ctx.handle);
+	
+	if (ctx.handle >= dev->queue_count) return -EINVAL;
+	q = dev->queuelist[ctx.handle];
+	
+	atomic_inc(&q->use_count);
+	if (atomic_read(&q->use_count) == 1) {
+				/* No longer in use */
+		atomic_dec(&q->use_count);
+		return -EINVAL;
+	}
+	
+	atomic_inc(&q->finalization); /* Mark queue in finalization state */
+	atomic_sub(2, &q->use_count); /* Mark queue as unused (pending
+					 finalization) */
+
+	while (test_and_set_bit(0, &dev->interrupt_flag)) {
+		schedule();
+		if (signal_pending(current)) {
+			clear_bit(0, &dev->interrupt_flag);
+			return -EINTR;
+		}
+	}
+				/* Remove queued buffers */
+	while ((buf = drm_waitlist_get(&q->waitlist))) {
+		drm_free_buffer(dev, buf);
+	}
+	clear_bit(0, &dev->interrupt_flag);
+	
+				/* Wakeup blocked processes */
+	wake_up_interruptible(&q->read_queue);
+	wake_up_interruptible(&q->write_queue);
+	wake_up_interruptible(&q->flush_queue);
+	
+				/* Finalization over.  Queue is made
+				   available when both use_count and
+				   finalization become 0, which won't
+				   happen until all the waiting processes
+				   stop waiting. */
+	atomic_dec(&q->finalization);
+	return 0;
+}
diff --git a/linux/dma.c b/linux/dma.c
new file mode 100644
index 00000000..ea08a859
--- /dev/null
+++ b/linux/dma.c
@@ -0,0 +1,531 @@
+/* dma.c -- DMA IOCTL and function support -*- linux-c -*-
+ * Created: Fri Mar 19 14:30:16 1999 by faith@precisioninsight.com
+ * Revised: Thu Sep 16 12:55:39 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/dma.c,v 1.7 1999/09/16 16:56:18 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/dma.c,v 1.1 1999/09/25 14:37:58 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+#include <linux/interrupt.h>	/* For task queue support */
+
+void drm_dma_setup(drm_device_t *dev)
+{
+	int i;
+	
+	dev->dma = drm_alloc(sizeof(*dev->dma), DRM_MEM_DRIVER);
+	memset(dev->dma, 0, sizeof(*dev->dma));
+	for (i = 0; i <= DRM_MAX_ORDER; i++)
+		memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0]));
+}
+
+void drm_dma_takedown(drm_device_t *dev)
+{
+	drm_device_dma_t  *dma = dev->dma;
+	int		  i, j;
+
+	if (!dma) return;
+	
+				/* Clear dma buffers */
+	for (i = 0; i <= DRM_MAX_ORDER; i++) {
+		if (dma->bufs[i].seg_count) {
+			DRM_DEBUG("order %d: buf_count = %d,"
+				  " seg_count = %d\n",
+				  i,
+				  dma->bufs[i].buf_count,
+				  dma->bufs[i].seg_count);
+			for (j = 0; j < dma->bufs[i].seg_count; j++) {
+				drm_free_pages(dma->bufs[i].seglist[j],
+					       dma->bufs[i].page_order,
+					       DRM_MEM_DMA);
+			}
+			drm_free(dma->bufs[i].buflist,
+				 dma->buf_count
+				 * sizeof(*dma->bufs[0].buflist),
+				 DRM_MEM_BUFS);
+			drm_free(dma->bufs[i].seglist,
+				 dma->buf_count
+				 * sizeof(*dma->bufs[0].seglist),
+				 DRM_MEM_SEGS);
+			drm_freelist_destroy(&dma->bufs[i].freelist);
+		}
+	}
+	
+	if (dma->buflist) {
+		drm_free(dma->buflist,
+			 dma->buf_count * sizeof(*dma->buflist),
+			 DRM_MEM_BUFS);
+	}
+
+	if (dma->pagelist) {
+		drm_free(dma->pagelist,
+			 dma->page_count * sizeof(*dma->pagelist),
+			 DRM_MEM_PAGES);
+	}
+	drm_free(dev->dma, sizeof(*dev->dma), DRM_MEM_DRIVER);
+	dev->dma = NULL;
+}
+
+#if DRM_DMA_HISTOGRAM
+/* This is slow, but is useful for debugging. */
+int drm_histogram_slot(unsigned long count)
+{
+	int value = DRM_DMA_HISTOGRAM_INITIAL;
+	int slot;
+
+	for (slot = 0;
+	     slot < DRM_DMA_HISTOGRAM_SLOTS;
+	     ++slot, value = DRM_DMA_HISTOGRAM_NEXT(value)) {
+		if (count < value) return slot;
+	}
+	return DRM_DMA_HISTOGRAM_SLOTS - 1;
+}
+
+void drm_histogram_compute(drm_device_t *dev, drm_buf_t *buf)
+{
+	cycles_t queued_to_dispatched;
+	cycles_t dispatched_to_completed;
+	cycles_t completed_to_freed;
+	int	 q2d, d2c, c2f, q2c, q2f;
+	
+	if (buf->time_queued) {
+		queued_to_dispatched	= (buf->time_dispatched
+					   - buf->time_queued);
+		dispatched_to_completed = (buf->time_completed
+					   - buf->time_dispatched);
+		completed_to_freed	= (buf->time_freed
+					   - buf->time_completed);
+
+		q2d = drm_histogram_slot(queued_to_dispatched);
+		d2c = drm_histogram_slot(dispatched_to_completed);
+		c2f = drm_histogram_slot(completed_to_freed);
+
+		q2c = drm_histogram_slot(queued_to_dispatched
+					 + dispatched_to_completed);
+		q2f = drm_histogram_slot(queued_to_dispatched
+					 + dispatched_to_completed
+					 + completed_to_freed);
+		
+		atomic_inc(&dev->histo.total);
+		atomic_inc(&dev->histo.queued_to_dispatched[q2d]);
+		atomic_inc(&dev->histo.dispatched_to_completed[d2c]);
+		atomic_inc(&dev->histo.completed_to_freed[c2f]);
+		
+		atomic_inc(&dev->histo.queued_to_completed[q2c]);
+		atomic_inc(&dev->histo.queued_to_freed[q2f]);
+
+	}
+	buf->time_queued     = 0;
+	buf->time_dispatched = 0;
+	buf->time_completed  = 0;
+	buf->time_freed	     = 0;
+}
+#endif
+
+void drm_free_buffer(drm_device_t *dev, drm_buf_t *buf)
+{
+	drm_device_dma_t *dma = dev->dma;
+
+	if (!buf) return;
+	
+	buf->waiting  = 0;
+	buf->pending  = 0;
+	buf->pid      = 0;
+	buf->used     = 0;
+#if DRM_DMA_HISTOGRAM
+	buf->time_completed = get_cycles();
+#endif
+	if (waitqueue_active(&buf->dma_wait)) {
+		wake_up_interruptible(&buf->dma_wait);
+	} else {
+				/* If processes are waiting, the last one
+				   to wake will put the buffer on the free
+				   list.  If no processes are waiting, we
+				   put the buffer on the freelist here. */
+		drm_freelist_put(dev, &dma->bufs[buf->order].freelist, buf);
+	}
+}
+
+void drm_reclaim_buffers(drm_device_t *dev, pid_t pid)
+{
+	drm_device_dma_t *dma = dev->dma;
+	int		 i;
+
+	if (!dma) return;
+	for (i = 0; i < dma->buf_count; i++) {
+		if (dma->buflist[i]->pid == pid) {
+			switch (dma->buflist[i]->list) {
+			case DRM_LIST_NONE:
+				drm_free_buffer(dev, dma->buflist[i]);
+				break;
+			case DRM_LIST_WAIT:
+				dma->buflist[i]->list = DRM_LIST_RECLAIM;
+				break;
+			default:
+				/* Buffer already on hardware. */
+				break;
+			}
+		}
+	}
+}
+
+int drm_context_switch(drm_device_t *dev, int old, int new)
+{
+	char	    buf[64];
+	drm_queue_t *q;
+
+	atomic_inc(&dev->total_ctx);
+
+	if (test_and_set_bit(0, &dev->context_flag)) {
+		DRM_ERROR("Reentering -- FIXME\n");
+		return -EBUSY;
+	}
+
+#if DRM_DMA_HISTOGRAM
+	dev->ctx_start = get_cycles();
+#endif
+	
+	DRM_DEBUG("Context switch from %d to %d\n", old, new);
+
+	if (new >= dev->queue_count) {
+		clear_bit(0, &dev->context_flag);
+		return -EINVAL;
+	}
+
+	if (new == dev->last_context) {
+		clear_bit(0, &dev->context_flag);
+		return 0;
+	}
+	
+	q = dev->queuelist[new];
+	atomic_inc(&q->use_count);
+	if (atomic_read(&q->use_count) == 1) {
+		atomic_dec(&q->use_count);
+		clear_bit(0, &dev->context_flag);
+		return -EINVAL;
+	}
+
+	if (drm_flags & DRM_FLAG_NOCTX) {
+		drm_context_switch_complete(dev, new);
+	} else {
+		sprintf(buf, "C %d %d\n", old, new);
+		drm_write_string(dev, buf);
+	}
+	
+	atomic_dec(&q->use_count);
+	
+	return 0;
+}
+
+int drm_context_switch_complete(drm_device_t *dev, int new)
+{
+	drm_device_dma_t *dma = dev->dma;
+	
+	dev->last_context = new;  /* PRE/POST: This is the _only_ writer. */
+	dev->last_switch  = jiffies;
+	
+	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+		DRM_ERROR("Lock isn't held after context switch\n");
+	}
+
+	if (!dma || !(dma->next_buffer && dma->next_buffer->while_locked)) {
+		if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
+				  DRM_KERNEL_CONTEXT)) {
+			DRM_ERROR("Cannot free lock\n");
+		}
+	}
+	
+#if DRM_DMA_HISTOGRAM
+	atomic_inc(&dev->histo.ctx[drm_histogram_slot(get_cycles()
+						      - dev->ctx_start)]);
+		   
+#endif
+	clear_bit(0, &dev->context_flag);
+	wake_up_interruptible(&dev->context_wait);
+	
+	return 0;
+}
+
+void drm_clear_next_buffer(drm_device_t *dev)
+{
+	drm_device_dma_t *dma = dev->dma;
+	
+	dma->next_buffer = NULL;
+	if (dma->next_queue && !DRM_BUFCOUNT(&dma->next_queue->waitlist)) {
+		wake_up_interruptible(&dma->next_queue->flush_queue);
+	}
+	dma->next_queue	 = NULL;
+}
+
+
+int drm_select_queue(drm_device_t *dev, void (*wrapper)(unsigned long))
+{
+	int	   i;
+	int	   candidate = -1;
+	int	   j	     = jiffies;
+
+	if (!dev) {
+		DRM_ERROR("No device\n");
+		return -1;
+	}
+	if (!dev->queuelist || !dev->queuelist[DRM_KERNEL_CONTEXT]) {
+				/* This only happens between the time the
+				   interrupt is initialized and the time
+				   the queues are initialized. */
+		return -1;
+	}
+
+				/* Doing "while locked" DMA? */
+	if (DRM_WAITCOUNT(dev, DRM_KERNEL_CONTEXT)) {
+		return DRM_KERNEL_CONTEXT;
+	}
+
+				/* If there are buffers on the last_context
+				   queue, and we have not been executing
+				   this context very long, continue to
+				   execute this context. */
+	if (dev->last_switch <= j
+	    && dev->last_switch + DRM_TIME_SLICE > j
+	    && DRM_WAITCOUNT(dev, dev->last_context)) {
+		return dev->last_context;
+	}
+
+				/* Otherwise, find a candidate */
+	for (i = dev->last_checked + 1; i < dev->queue_count; i++) {
+		if (DRM_WAITCOUNT(dev, i)) {
+			candidate = dev->last_checked = i;
+			break;
+		}
+	}
+
+	if (candidate < 0) {
+		for (i = 0; i < dev->queue_count; i++) {
+			if (DRM_WAITCOUNT(dev, i)) {
+				candidate = dev->last_checked = i;
+				break;
+			}
+		}
+	}
+
+	if (wrapper
+	    && candidate >= 0
+	    && candidate != dev->last_context
+	    && dev->last_switch <= j
+	    && dev->last_switch + DRM_TIME_SLICE > j) {
+		if (dev->timer.expires != dev->last_switch + DRM_TIME_SLICE) {
+			del_timer(&dev->timer);
+			dev->timer.function = wrapper;
+			dev->timer.data	    = (unsigned long)dev;
+			dev->timer.expires  = dev->last_switch+DRM_TIME_SLICE;
+			add_timer(&dev->timer);
+		}
+		return -1;
+	}
+
+	return candidate;
+}
+
+
+int drm_dma_enqueue(drm_device_t *dev, drm_dma_t *d)
+{
+	int		  i;
+	drm_queue_t	  *q;
+	drm_buf_t	  *buf;
+	int		  idx;
+	int		  while_locked = 0;
+	drm_device_dma_t  *dma = dev->dma;
+	DECLARE_WAITQUEUE(entry, current);
+
+	DRM_DEBUG("%d\n", d->send_count);
+
+	if (d->flags & _DRM_DMA_WHILE_LOCKED) {
+		int context = dev->lock.hw_lock->lock;
+		
+		if (!_DRM_LOCK_IS_HELD(context)) {
+			DRM_ERROR("No lock held during \"while locked\""
+				  " request\n");
+			return -EINVAL;
+		}
+		if (d->context != _DRM_LOCKING_CONTEXT(context)
+		    && _DRM_LOCKING_CONTEXT(context) != DRM_KERNEL_CONTEXT) {
+			DRM_ERROR("Lock held by %d while %d makes"
+				  " \"while locked\" request\n",
+				  _DRM_LOCKING_CONTEXT(context),
+				  d->context);
+			return -EINVAL;
+		}
+		q = dev->queuelist[DRM_KERNEL_CONTEXT];
+		while_locked = 1;
+	} else {
+		q = dev->queuelist[d->context];
+	}
+
+
+	atomic_inc(&q->use_count);
+	if (atomic_read(&q->block_write)) {
+		current->state = TASK_INTERRUPTIBLE;
+		add_wait_queue(&q->write_queue, &entry);
+		atomic_inc(&q->block_count);
+		for (;;) {
+			if (!atomic_read(&q->block_write)) break;
+			schedule();
+			if (signal_pending(current)) {
+				atomic_dec(&q->use_count);
+				return -EINTR;
+			}
+		}
+		atomic_dec(&q->block_count);
+		current->state = TASK_RUNNING;
+		remove_wait_queue(&q->write_queue, &entry);
+	}
+	
+	for (i = 0; i < d->send_count; i++) {
+		idx = d->send_indices[i];
+		if (idx < 0 || idx >= dma->buf_count) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Index %d (of %d max)\n",
+				  d->send_indices[i], dma->buf_count - 1);
+			return -EINVAL;
+		}
+		buf = dma->buflist[ idx ];
+		if (buf->pid != current->pid) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Process %d using buffer owned by %d\n",
+				  current->pid, buf->pid);
+			return -EINVAL;
+		}
+		if (buf->list != DRM_LIST_NONE) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Process %d using buffer %d on list %d\n",
+				  current->pid, buf->idx, buf->list);
+		}
+		buf->used	  = d->send_sizes[i];
+		buf->while_locked = while_locked;
+		buf->context	  = d->context;
+		if (!buf->used) {
+			DRM_ERROR("Queueing 0 length buffer\n");
+		}
+		if (buf->pending) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Queueing pending buffer:"
+				  " buffer %d, offset %d\n",
+				  d->send_indices[i], i);
+			return -EINVAL;
+		}
+		if (buf->waiting) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Queueing waiting buffer:"
+				  " buffer %d, offset %d\n",
+				  d->send_indices[i], i);
+			return -EINVAL;
+		}
+		buf->waiting = 1;
+		if (atomic_read(&q->use_count) == 1
+		    || atomic_read(&q->finalization)) {
+			drm_free_buffer(dev, buf);
+		} else {
+			drm_waitlist_put(&q->waitlist, buf);
+			atomic_inc(&q->total_queued);
+		}
+	}
+	atomic_dec(&q->use_count);
+	
+	return 0;
+}
+
+static int drm_dma_get_buffers_of_order(drm_device_t *dev, drm_dma_t *d,
+					int order)
+{
+	int		  i;
+	drm_buf_t	  *buf;
+	drm_device_dma_t  *dma = dev->dma;
+	
+	for (i = d->granted_count; i < d->request_count; i++) {
+		buf = drm_freelist_get(&dma->bufs[order].freelist,
+				       d->flags & _DRM_DMA_WAIT);
+		if (!buf) break;
+		if (buf->pending || buf->waiting) {
+			DRM_ERROR("Free buffer %d in use by %d (w%d, p%d)\n",
+				  buf->idx,
+				  buf->pid,
+				  buf->waiting,
+				  buf->pending);
+		}
+		buf->pid     = current->pid;
+		copy_to_user_ret(&d->request_indices[i],
+				 &buf->idx,
+				 sizeof(buf->idx),
+				 -EFAULT);
+		copy_to_user_ret(&d->request_sizes[i],
+				 &buf->total,
+				 sizeof(buf->total),
+				 -EFAULT);
+		++d->granted_count;
+	}
+	return 0;
+}
+
+
+int drm_dma_get_buffers(drm_device_t *dev, drm_dma_t *dma)
+{
+	int		  order;
+	int		  retcode = 0;
+	int		  tmp_order;
+	
+	order = drm_order(dma->request_size);
+
+	dma->granted_count = 0;
+	retcode		   = drm_dma_get_buffers_of_order(dev, dma, order);
+
+	if (dma->granted_count < dma->request_count
+	    && (dma->flags & _DRM_DMA_SMALLER_OK)) {
+		for (tmp_order = order - 1;
+		     !retcode
+			     && dma->granted_count < dma->request_count
+			     && tmp_order >= DRM_MIN_ORDER;
+		     --tmp_order) {
+			
+			retcode = drm_dma_get_buffers_of_order(dev, dma,
+							       tmp_order);
+		}
+	}
+
+	if (dma->granted_count < dma->request_count
+	    && (dma->flags & _DRM_DMA_LARGER_OK)) {
+		for (tmp_order = order + 1;
+		     !retcode
+			     && dma->granted_count < dma->request_count
+			     && tmp_order <= DRM_MAX_ORDER;
+		     ++tmp_order) {
+			
+			retcode = drm_dma_get_buffers_of_order(dev, dma,
+							       tmp_order);
+		}
+	}
+	return 0;
+}
diff --git a/linux/drawable.c b/linux/drawable.c
new file mode 100644
index 00000000..c26953c1
--- /dev/null
+++ b/linux/drawable.c
@@ -0,0 +1,50 @@
+/* drawable.c -- IOCTLs for drawables -*- linux-c -*-
+ * Created: Tue Feb  2 08:37:54 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 09:27:03 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drawable.c,v 1.3 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drawable.c,v 1.1 1999/09/25 14:37:58 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+int drm_adddraw(struct inode *inode, struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	drm_draw_t draw;
+
+	draw.handle = 0;	/* NOOP */
+	DRM_DEBUG("%d\n", draw.handle);
+	copy_to_user_ret((drm_draw_t *)arg, &draw, sizeof(draw), -EFAULT);
+	return 0;
+}
+
+int drm_rmdraw(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	return 0;		/* NOOP */
+}
diff --git a/linux/drm.h b/linux/drm.h
new file mode 100644
index 00000000..324e2002
--- /dev/null
+++ b/linux/drm.h
@@ -0,0 +1,277 @@
+/* drm.h -- Header for Direct Rendering Manager -*- linux-c -*-
+ * Created: Mon Jan  4 10:05:05 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 13:08:18 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All rights reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drm.h,v 1.46 1999/08/20 20:00:53 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drm.h,v 1.1 1999/09/25 14:37:58 dawes Exp $
+ * 
+ */
+
+#ifndef _DRM_H_
+#define _DRM_H_
+
+#include <asm/ioctl.h>		/* For _IO* macros */
+
+#define DRM_PROC_DEVICES "/proc/devices"
+#define DRM_PROC_MISC	 "/proc/misc"
+#define DRM_PROC_DRM	 "/proc/drm"
+#define DRM_DEV_DRM	 "/dev/drm"
+#define DRM_DEV_MODE	 (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
+#define DRM_DEV_UID	 0
+#define DRM_DEV_GID	 0
+
+
+#define DRM_NAME	"drm"	  /* Name in kernel, /dev, and /proc	    */
+#define DRM_MIN_ORDER	5	  /* At least 2^5 bytes = 32 bytes	    */
+#define DRM_MAX_ORDER	22	  /* Up to 2^22 bytes = 4MB		    */
+#define DRM_RAM_PERCENT 10	  /* How much system ram can we lock?	    */
+
+#define _DRM_LOCK_HELD	0x80000000 /* Hardware lock is held		    */
+#define _DRM_LOCK_CONT	0x40000000 /* Hardware lock is contended	    */
+#define _DRM_LOCK_IS_HELD(lock)	   ((lock) & _DRM_LOCK_HELD)
+#define _DRM_LOCK_IS_CONT(lock)	   ((lock) & _DRM_LOCK_CONT)
+#define _DRM_LOCKING_CONTEXT(lock) ((lock) & ~(_DRM_LOCK_HELD|_DRM_LOCK_CONT))
+
+typedef unsigned long drm_handle_t;
+typedef unsigned int  drm_context_t;
+typedef unsigned int  drm_drawable_t;
+typedef unsigned int  drm_magic_t;
+
+
+typedef struct drm_version {
+	int    version_major;	  /* Major version			    */
+	int    version_minor;	  /* Minor version			    */
+	int    version_patchlevel;/* Patch level			    */
+	size_t name_len;	  /* Length of name buffer		    */
+	char   *name;		  /* Name of driver			    */
+	size_t date_len;	  /* Length of date buffer		    */
+	char   *date;		  /* User-space buffer to hold date	    */
+	size_t desc_len;	  /* Length of desc buffer		    */
+	char   *desc;		  /* User-space buffer to hold desc	    */
+} drm_version_t;
+
+typedef struct drm_unique {
+	size_t unique_len;	  /* Length of unique			    */
+	char   *unique;		  /* Unique name for driver instantiation   */
+} drm_unique_t;
+
+typedef struct drm_list {
+	int		 count;	  /* Length of user-space structures	    */
+	drm_version_t	 *version;
+} drm_list_t;
+
+typedef struct drm_block {
+	int		 unused;
+} drm_block_t;
+
+typedef struct drm_control {
+	enum {
+		DRM_ADD_COMMAND,
+		DRM_RM_COMMAND,
+		DRM_INST_HANDLER,
+		DRM_UNINST_HANDLER
+	}		 func;
+	int		 irq;
+} drm_control_t;
+
+typedef enum drm_map_type {
+	_DRM_FRAME_BUFFER = 0,	  /* WC (no caching), no core dump	    */
+	_DRM_REGISTERS	  = 1,	  /* no caching, no core dump		    */
+	_DRM_SHM	  = 2	  /* shared, cached			    */
+} drm_map_type_t;
+
+typedef enum drm_map_flags {
+	_DRM_RESTRICTED	     = 0x01, /* Cannot be mapped to user-virtual    */
+	_DRM_READ_ONLY	     = 0x02,
+	_DRM_LOCKED	     = 0x04, /* shared, cached, locked		    */
+	_DRM_KERNEL	     = 0x08, /* kernel requires access		    */
+	_DRM_WRITE_COMBINING = 0x10, /* use write-combining if available    */
+	_DRM_CONTAINS_LOCK   = 0x20  /* SHM page that contains lock	    */
+} drm_map_flags_t;
+
+typedef struct drm_map {
+	unsigned long	offset;	 /* Requested physical address (0 for SAREA)*/
+	unsigned long	size;	 /* Requested physical size (bytes)	    */
+	drm_map_type_t	type;	 /* Type of memory to map		    */
+	drm_map_flags_t flags;	 /* Flags				    */
+	void		*handle; /* User-space: "Handle" to pass to mmap    */
+				 /* Kernel-space: kernel-virtual address    */
+	int		mtrr;	 /* MTRR slot used			    */
+				 /* Private data			    */
+} drm_map_t;
+
+typedef enum drm_lock_flags {
+	_DRM_LOCK_READY	     = 0x01, /* Wait until hardware is ready for DMA */
+	_DRM_LOCK_QUIESCENT  = 0x02, /* Wait until hardware quiescent	     */
+	_DRM_LOCK_FLUSH	     = 0x04, /* Flush this context's DMA queue first */
+	_DRM_LOCK_FLUSH_ALL  = 0x08, /* Flush all DMA queues first	     */
+				/* These *HALT* flags aren't supported yet
+				   -- they will be used to support the
+				   full-screen DGA-like mode. */
+	_DRM_HALT_ALL_QUEUES = 0x10, /* Halt all current and future queues   */
+	_DRM_HALT_CUR_QUEUES = 0x20  /* Halt all current queues		     */
+} drm_lock_flags_t;
+
+typedef struct drm_lock {
+	int		 context;
+	drm_lock_flags_t flags;
+} drm_lock_t;
+
+typedef enum drm_dma_flags {	      /* These values *MUST* match xf86drm.h */
+				      /* Flags for DMA buffer dispatch	     */
+	_DRM_DMA_BLOCK	      = 0x01, /* Block until buffer dispatched.
+					 Note, the buffer may not yet have
+					 been processed by the hardware --
+					 getting a hardware lock with the
+					 hardware quiescent will ensure
+					 that the buffer has been
+					 processed.			     */
+	_DRM_DMA_WHILE_LOCKED = 0x02, /* Dispatch while lock held	     */
+	_DRM_DMA_PRIORITY     = 0x04, /* High priority dispatch		     */
+
+				      /* Flags for DMA buffer request	     */
+	_DRM_DMA_WAIT	      = 0x10, /* Wait for free buffers		     */
+	_DRM_DMA_SMALLER_OK   = 0x20, /* Smaller-than-requested buffers ok   */
+	_DRM_DMA_LARGER_OK    = 0x40  /* Larger-than-requested buffers ok    */
+} drm_dma_flags_t;
+
+typedef struct drm_buf_desc {
+	int	      count;	 /* Number of buffers of this size	     */
+	int	      size;	 /* Size in bytes			     */
+	int	      low_mark;	 /* Low water mark			     */
+	int	      high_mark; /* High water mark			     */
+	enum {
+		DRM_PAGE_ALIGN = 0x01  /* Align on page boundaries for DMA   */
+	}	      flags;
+} drm_buf_desc_t;
+
+typedef struct drm_buf_info {
+	int	       count;	/* Entries in list			     */
+	drm_buf_desc_t *list;
+} drm_buf_info_t;
+
+typedef struct drm_buf_free {
+	int	       count;
+	int	       *list;
+} drm_buf_free_t;
+
+typedef struct drm_buf_pub {
+	int		  idx;	       /* Index into master buflist	     */
+	int		  total;       /* Buffer size			     */
+	int		  used;	       /* Amount of buffer in use (for DMA)  */
+	void		  *address;    /* Address of buffer		     */
+} drm_buf_pub_t;
+
+typedef struct drm_buf_map {
+	int	      count;	/* Length of buflist			    */
+	void	      *virtual;	/* Mmaped area in user-virtual		    */
+	drm_buf_pub_t *list;	/* Buffer information			    */
+} drm_buf_map_t;
+
+typedef struct drm_dma {
+				/* Indices here refer to the offset into
+				   buflist in drm_buf_get_t.  */
+	int		context;	  /* Context handle		    */
+	int		send_count;	  /* Number of buffers to send	    */
+	int		*send_indices;	  /* List of handles to buffers	    */
+	int		*send_sizes;	  /* Lengths of data to send	    */
+	drm_dma_flags_t flags;		  /* Flags			    */
+	int		request_count;	  /* Number of buffers requested    */
+	int		request_size;	  /* Desired size for buffers	    */
+	int		*request_indices; /* Buffer information		    */
+	int		*request_sizes;
+	int		granted_count;	  /* Number of buffers granted	    */
+} drm_dma_t;
+
+typedef enum {
+	_DRM_CONTEXT_PRESERVED = 0x01,
+	_DRM_CONTEXT_2DONLY    = 0x02
+} drm_ctx_flags_t;
+
+typedef struct drm_ctx {
+	drm_context_t	handle;
+	drm_ctx_flags_t flags;
+} drm_ctx_t;
+
+typedef struct drm_ctx_res {
+	int		count;
+	drm_ctx_t	*contexts;
+} drm_ctx_res_t;
+
+typedef struct drm_draw {
+	drm_drawable_t	handle;
+} drm_draw_t;
+
+typedef struct drm_auth {
+	drm_magic_t	magic;
+} drm_auth_t;
+
+typedef struct drm_irq_busid {
+	int irq;
+	int busnum;
+	int devnum;
+	int funcnum;
+} drm_irq_busid_t;
+
+#define DRM_IOCTL_BASE	     'd'
+#define DRM_IOCTL_NR(n)	     _IOC_NR(n)
+#define DRM_IO(nr)	     _IO(DRM_IOCTL_BASE,nr)
+#define DRM_IOR(nr,size)     _IOR(DRM_IOCTL_BASE,nr,size)
+#define DRM_IOW(nr,size)     _IOW(DRM_IOCTL_BASE,nr,size)
+#define DRM_IOWR(nr,size)    _IOWR(DRM_IOCTL_BASE,nr,size)
+
+
+#define DRM_IOCTL_VERSION    DRM_IOWR(0x00, drm_version_t)
+#define DRM_IOCTL_GET_UNIQUE DRM_IOWR(0x01, drm_unique_t)
+#define DRM_IOCTL_GET_MAGIC  DRM_IOW( 0x02, drm_auth_t)
+#define DRM_IOCTL_IRQ_BUSID  DRM_IOWR(0x03, drm_irq_busid_t)
+
+#define DRM_IOCTL_SET_UNIQUE DRM_IOW( 0x10, drm_unique_t)
+#define DRM_IOCTL_AUTH_MAGIC DRM_IOW( 0x11, drm_auth_t)
+#define DRM_IOCTL_BLOCK	     DRM_IOWR(0x12, drm_block_t)
+#define DRM_IOCTL_UNBLOCK    DRM_IOWR(0x13, drm_block_t)
+#define DRM_IOCTL_CONTROL    DRM_IOW( 0x14, drm_control_t)
+#define DRM_IOCTL_ADD_MAP    DRM_IOWR(0x15, drm_map_t)
+#define DRM_IOCTL_ADD_BUFS   DRM_IOWR(0x16, drm_buf_desc_t)
+#define DRM_IOCTL_MARK_BUFS  DRM_IOW( 0x17, drm_buf_desc_t)
+#define DRM_IOCTL_INFO_BUFS  DRM_IOWR(0x18, drm_buf_info_t)
+#define DRM_IOCTL_MAP_BUFS   DRM_IOWR(0x19, drm_buf_map_t)
+#define DRM_IOCTL_FREE_BUFS  DRM_IOW( 0x1a, drm_buf_free_t)
+
+#define DRM_IOCTL_ADD_CTX    DRM_IOWR(0x20, drm_ctx_t)
+#define DRM_IOCTL_RM_CTX     DRM_IOWR(0x21, drm_ctx_t)
+#define DRM_IOCTL_MOD_CTX    DRM_IOW( 0x22, drm_ctx_t)
+#define DRM_IOCTL_GET_CTX    DRM_IOWR(0x23, drm_ctx_t)
+#define DRM_IOCTL_SWITCH_CTX DRM_IOW( 0x24, drm_ctx_t)
+#define DRM_IOCTL_NEW_CTX    DRM_IOW( 0x25, drm_ctx_t)
+#define DRM_IOCTL_RES_CTX    DRM_IOWR(0x26, drm_ctx_res_t)
+#define DRM_IOCTL_ADD_DRAW   DRM_IOWR(0x27, drm_draw_t)
+#define DRM_IOCTL_RM_DRAW    DRM_IOWR(0x28, drm_draw_t)
+#define DRM_IOCTL_DMA	     DRM_IOWR(0x29, drm_dma_t)
+#define DRM_IOCTL_LOCK	     DRM_IOW( 0x2a, drm_lock_t)
+#define DRM_IOCTL_UNLOCK     DRM_IOW( 0x2b, drm_lock_t)
+#define DRM_IOCTL_FINISH     DRM_IOW( 0x2c, drm_lock_t)
+
+#endif
diff --git a/linux/drmP.h b/linux/drmP.h
new file mode 100644
index 00000000..37b9d053
--- /dev/null
+++ b/linux/drmP.h
@@ -0,0 +1,585 @@
+/* drmP.h -- Private header for Direct Rendering Manager -*- linux-c -*-
+ * Created: Mon Jan  4 10:05:05 1999 by faith@precisioninsight.com
+ * Revised: Tue Oct 12 08:51:07 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All rights reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drmP.h,v 1.58 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/drmP.h,v 1.1 1999/09/25 14:37:59 dawes Exp $
+ * 
+ */
+
+#ifndef _DRM_P_H_
+#define _DRM_P_H_
+
+#ifdef __KERNEL__
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/file.h>
+#include <linux/pci.h>
+#include <linux/wrapper.h>
+#include <linux/version.h>
+#include <asm/io.h>
+#include <asm/mman.h>
+#include <asm/uaccess.h>
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif
+#include "drm.h"
+
+#define DRM_DEBUG_CODE 2	  /* Include debugging code (if > 1, then
+				     also include looping detection. */
+#define DRM_DMA_HISTOGRAM 1	  /* Make histogram of DMA latency. */
+
+#define DRM_HASH_SIZE	      16 /* Size of key hash table		  */
+#define DRM_KERNEL_CONTEXT    0	 /* Change drm_resctx if changed	  */
+#define DRM_RESERVED_CONTEXTS 1	 /* Change drm_resctx if changed	  */
+#define DRM_LOOPING_LIMIT     5000000
+#define DRM_BSZ		      1024 /* Buffer size for /dev/drm? output	  */
+#define DRM_TIME_SLICE	      (HZ/20)  /* Time slice for GLXContexts	  */
+#define DRM_LOCK_SLICE	      1	/* Time slice for lock, in jiffies	  */
+
+#define DRM_FLAG_DEBUG	  0x01
+#define DRM_FLAG_NOCTX	  0x02
+
+#define DRM_MEM_DMA	  0
+#define DRM_MEM_SAREA	  1
+#define DRM_MEM_DRIVER	  2
+#define DRM_MEM_MAGIC	  3
+#define DRM_MEM_IOCTLS	  4
+#define DRM_MEM_MAPS	  5
+#define DRM_MEM_VMAS	  6
+#define DRM_MEM_BUFS	  7
+#define DRM_MEM_SEGS	  8
+#define DRM_MEM_PAGES	  9
+#define DRM_MEM_FILES	 10
+#define DRM_MEM_QUEUES	 11
+#define DRM_MEM_CMDS	 12
+#define DRM_MEM_MAPPINGS 13
+#define DRM_MEM_BUFLISTS 14
+
+				/* Backward compatibility section */
+#ifndef _PAGE_PWT
+				/* The name of _PAGE_WT was changed to
+				   _PAGE_PWT in Linux 2.2.6 */
+#define _PAGE_PWT _PAGE_WT
+#endif
+				/* Wait queue declarations changes in 2.3.1 */
+#ifndef DECLARE_WAITQUEUE
+#define DECLARE_WAITQUEUE(w,c) struct wait_queue w = { c, NULL }
+typedef struct wait_queue *wait_queue_head_t;
+#define init_waitqueue_head(q) *q = NULL;
+#endif
+
+#define __drm_dummy_lock(lock) (*(__volatile__ unsigned int *)lock)
+#define _DRM_CAS(lock,old,new,__ret)				       \
+	do {							       \
+		int __dummy;	/* Can't mark eax as clobbered */      \
+		__asm__ __volatile__(				       \
+			"lock ; cmpxchg %4,%1\n\t"		       \
+			"setnz %0"				       \
+			: "=d" (__ret),				       \
+			  "=m" (__drm_dummy_lock(lock)),	       \
+			  "=a" (__dummy)			       \
+			: "2" (old),				       \
+			  "r" (new));				       \
+	} while (0)
+
+
+
+				/* Macros to make printk easier */
+#define DRM_ERROR(fmt, arg...) \
+	printk(KERN_ERR "[" DRM_NAME ":" __FUNCTION__ "] *ERROR* " fmt , ##arg)
+#define DRM_MEM_ERROR(area, fmt, arg...) \
+	printk(KERN_ERR "[" DRM_NAME ":" __FUNCTION__ ":%s] *ERROR* " fmt , \
+	       drm_mem_stats[area].name , ##arg)
+#define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)
+
+#if DRM_DEBUG_CODE
+#define DRM_DEBUG(fmt, arg...)						  \
+	do {								  \
+		if (drm_flags&DRM_FLAG_DEBUG)				  \
+			printk(KERN_DEBUG				  \
+			       "[" DRM_NAME ":" __FUNCTION__ "] " fmt ,	  \
+			       ##arg);					  \
+	} while (0)
+#else
+#define DRM_DEBUG(fmt, arg...)		 do { } while (0)
+#endif
+
+#define DRM_PROC_LIMIT (PAGE_SIZE-80)
+
+#define DRM_PROC_PRINT(fmt, arg...)	   \
+   len += sprintf(&buf[len], fmt , ##arg); \
+   if (len > DRM_PROC_LIMIT) return len;
+
+#define DRM_PROC_PRINT_RET(ret, fmt, arg...)	    \
+   len += sprintf(&buf[len], fmt , ##arg);	    \
+   if (len > DRM_PROC_LIMIT) { ret; return len; }
+
+				/* Internal types and structures */
+#define DRM_ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+#define DRM_MIN(a,b) ((a)<(b)?(a):(b))
+#define DRM_MAX(a,b) ((a)>(b)?(a):(b))
+
+#define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))
+#define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(x))
+#define DRM_WAITCOUNT(dev,idx) DRM_BUFCOUNT(&dev->queuelist[idx]->waitlist)
+
+typedef int drm_ioctl_t(struct inode *inode, struct file *filp,
+			unsigned int cmd, unsigned long arg);
+
+typedef struct drm_ioctl_desc {
+	drm_ioctl_t	     *func;
+	int		     auth_needed;
+	int		     root_only;
+} drm_ioctl_desc_t;
+
+typedef struct drm_devstate {
+	pid_t		  owner;	/* X server pid holding x_lock */
+	
+} drm_devstate_t;
+
+typedef struct drm_magic_entry {
+	drm_magic_t	       magic;
+	struct drm_file	       *priv;
+	struct drm_magic_entry *next;
+} drm_magic_entry_t;
+
+typedef struct drm_magic_head {
+       struct drm_magic_entry *head;
+       struct drm_magic_entry *tail;
+} drm_magic_head_t;
+
+typedef struct drm_vma_entry {
+	struct vm_area_struct *vma;
+	struct drm_vma_entry  *next;
+	pid_t		      pid;
+} drm_vma_entry_t;
+
+typedef struct drm_buf {
+	int		  idx;	       /* Index into master buflist	     */
+	int		  total;       /* Buffer size			     */
+	int		  order;       /* log-base-2(total)		     */
+	int		  used;	       /* Amount of buffer in use (for DMA)  */
+	unsigned long	  offset;      /* Byte offset (used internally)	     */
+	void		  *address;    /* Address of buffer		     */
+	struct drm_buf	  *next;       /* Kernel-only: used for free list    */
+	__volatile__ int  waiting;     /* On kernel DMA queue		     */
+	__volatile__ int  pending;     /* On hardware DMA queue		     */
+	wait_queue_head_t dma_wait;    /* Processes waiting		     */
+	pid_t		  pid;	       /* PID of holding process	     */
+	int		  context;     /* Kernel queue for this buffer	     */
+	int		  while_locked;/* Dispatch this buffer while locked  */
+	enum {
+		DRM_LIST_NONE	 = 0,
+		DRM_LIST_FREE	 = 1,
+		DRM_LIST_WAIT	 = 2,
+		DRM_LIST_PEND	 = 3,
+		DRM_LIST_PRIO	 = 4,
+		DRM_LIST_RECLAIM = 5
+	}		  list;	       /* Which list we're on		     */
+#if DRM_DMA_HISTOGRAM
+	cycles_t	  time_queued;	   /* Queued to kernel DMA queue     */
+	cycles_t	  time_dispatched; /* Dispatched to hardware	     */
+	cycles_t	  time_completed;  /* Completed by hardware	     */
+	cycles_t	  time_freed;	   /* Back on freelist		     */
+#endif
+} drm_buf_t;
+
+#if DRM_DMA_HISTOGRAM
+#define DRM_DMA_HISTOGRAM_SLOTS		  9
+#define DRM_DMA_HISTOGRAM_INITIAL	 10
+#define DRM_DMA_HISTOGRAM_NEXT(current)	 ((current)*10)
+typedef struct drm_histogram {
+	atomic_t	  total;
+	
+	atomic_t	  queued_to_dispatched[DRM_DMA_HISTOGRAM_SLOTS];
+	atomic_t	  dispatched_to_completed[DRM_DMA_HISTOGRAM_SLOTS];
+	atomic_t	  completed_to_freed[DRM_DMA_HISTOGRAM_SLOTS];
+	
+	atomic_t	  queued_to_completed[DRM_DMA_HISTOGRAM_SLOTS];
+	atomic_t	  queued_to_freed[DRM_DMA_HISTOGRAM_SLOTS];
+	
+	atomic_t	  dma[DRM_DMA_HISTOGRAM_SLOTS];
+	atomic_t	  schedule[DRM_DMA_HISTOGRAM_SLOTS];
+	atomic_t	  ctx[DRM_DMA_HISTOGRAM_SLOTS];
+	atomic_t	  lacq[DRM_DMA_HISTOGRAM_SLOTS];
+	atomic_t	  lhld[DRM_DMA_HISTOGRAM_SLOTS];
+} drm_histogram_t;
+#endif
+
+				/* bufs is one longer than it has to be */
+typedef struct drm_waitlist {
+	int		  count;	/* Number of possible buffers	   */
+	drm_buf_t	  **bufs;	/* List of pointers to buffers	   */
+	drm_buf_t	  **rp;		/* Read pointer			   */
+	drm_buf_t	  **wp;		/* Write pointer		   */
+	drm_buf_t	  **end;	/* End pointer			   */
+	spinlock_t	  read_lock;
+	spinlock_t	  write_lock;
+} drm_waitlist_t;
+
+typedef struct drm_freelist {
+	int		  initialized; /* Freelist in use		   */
+	atomic_t	  count;       /* Number of free buffers	   */
+	drm_buf_t	  *next;       /* End pointer			   */
+	
+	wait_queue_head_t waiting;     /* Processes waiting on free bufs   */
+	int		  low_mark;    /* Low water mark		   */
+	int		  high_mark;   /* High water mark		   */
+	atomic_t	  wfh;	       /* If waiting for high mark	   */
+} drm_freelist_t;
+
+typedef struct drm_buf_entry {
+	int		  buf_size;
+	int		  buf_count;
+	drm_buf_t	  *buflist;
+	int		  seg_count;
+	int		  page_order;
+	unsigned long	  *seglist;
+
+	drm_freelist_t	  freelist;
+} drm_buf_entry_t;
+
+typedef struct drm_hw_lock {
+	__volatile__ unsigned int lock;
+	char			  padding[60]; /* Pad to cache line */
+} drm_hw_lock_t;
+
+typedef struct drm_file {
+	int		  authenticated;
+	int		  minor;
+	pid_t		  pid;
+	uid_t		  uid;
+	drm_magic_t	  magic;
+	unsigned long	  ioctl_count;
+	struct drm_file	  *next;
+	struct drm_file	  *prev;
+	struct drm_device *dev;
+} drm_file_t;
+
+
+typedef struct drm_queue {
+	atomic_t	  use_count;	/* Outstanding uses (+1)	    */
+	atomic_t	  finalization;	/* Finalization in progress	    */
+	atomic_t	  block_count;	/* Count of processes waiting	    */
+	atomic_t	  block_read;	/* Queue blocked for reads	    */
+	wait_queue_head_t read_queue;	/* Processes waiting on block_read  */
+	atomic_t	  block_write;	/* Queue blocked for writes	    */
+	wait_queue_head_t write_queue;	/* Processes waiting on block_write */
+	atomic_t	  total_queued;	/* Total queued statistic	    */
+	atomic_t	  total_flushed;/* Total flushes statistic	    */
+	atomic_t	  total_locks;	/* Total locks statistics	    */
+	drm_ctx_flags_t	  flags;	/* Context preserving and 2D-only   */
+	drm_waitlist_t	  waitlist;	/* Pending buffers		    */
+	wait_queue_head_t flush_queue;	/* Processes waiting until flush    */
+} drm_queue_t;
+
+typedef struct drm_lock_data {
+	drm_hw_lock_t	  *hw_lock;	/* Hardware lock		   */
+	pid_t		  pid;		/* PID of lock holder (0=kernel)   */
+	wait_queue_head_t lock_queue;	/* Queue of blocked processes	   */
+	unsigned long	  lock_time;	/* Time of last lock in jiffies	   */
+} drm_lock_data_t;
+
+typedef struct drm_device_dma {
+				/* Performance Counters */
+	atomic_t	  total_prio;	/* Total DRM_DMA_PRIORITY	   */
+	atomic_t	  total_bytes;	/* Total bytes DMA'd		   */
+	atomic_t	  total_dmas;	/* Total DMA buffers dispatched	   */
+	
+	atomic_t	  total_missed_dma;  /* Missed drm_do_dma	    */
+	atomic_t	  total_missed_lock; /* Missed lock in drm_do_dma   */
+	atomic_t	  total_missed_free; /* Missed drm_free_this_buffer */
+	atomic_t	  total_missed_sched;/* Missed drm_dma_schedule	    */
+
+	atomic_t	  total_tried;	/* Tried next_buffer		    */
+	atomic_t	  total_hit;	/* Sent next_buffer		    */
+	atomic_t	  total_lost;	/* Lost interrupt		    */
+
+	drm_buf_entry_t	  bufs[DRM_MAX_ORDER+1];
+	int		  buf_count;
+	drm_buf_t	  **buflist;	/* Vector of pointers info bufs	   */
+	int		  seg_count; 
+	int		  page_count;
+	unsigned long	  *pagelist;
+	unsigned long	  byte_count;
+
+				/* DMA support */
+	drm_buf_t	  *this_buffer;	/* Buffer being sent		   */
+	drm_buf_t	  *next_buffer; /* Selected buffer to send	   */
+	drm_queue_t	  *next_queue;	/* Queue from which buffer selected*/
+	wait_queue_head_t waiting;	/* Processes waiting on free bufs  */
+} drm_device_dma_t;
+
+typedef struct drm_device {
+	const char	  *name;	/* Simple driver name		   */
+	char		  *unique;	/* Unique identifier: e.g., busid  */
+	int		  unique_len;	/* Length of unique field	   */
+	dev_t		  device;	/* Device number for mknod	   */
+	char		  *devname;	/* For /proc/interrupts		   */
+	
+	int		  blocked;	/* Blocked due to VC switch?	   */
+	struct proc_dir_entry *root;	/* Root for this device's entries  */
+
+				/* Locks */
+	spinlock_t	  count_lock;	/* For inuse, open_count, buf_use  */
+	struct semaphore  struct_sem;	/* For others			   */
+
+				/* Usage Counters */
+	int		  open_count;	/* Outstanding files open	   */
+	atomic_t	  ioctl_count;	/* Outstanding IOCTLs pending	   */
+	atomic_t	  vma_count;	/* Outstanding vma areas open	   */
+	int		  buf_use;	/* Buffers in use -- cannot alloc  */
+	atomic_t	  buf_alloc;	/* Buffer allocation in progress   */
+
+				/* Performance Counters */
+	atomic_t	  total_open;
+	atomic_t	  total_close;
+	atomic_t	  total_ioctl;
+	atomic_t	  total_irq;	/* Total interruptions		   */
+	atomic_t	  total_ctx;	/* Total context switches	   */
+	
+	atomic_t	  total_locks;
+	atomic_t	  total_unlocks;
+	atomic_t	  total_contends;
+	atomic_t	  total_sleeps;
+
+				/* Authentication */
+	drm_file_t	  *file_first;
+	drm_file_t	  *file_last;
+	drm_magic_head_t  magiclist[DRM_HASH_SIZE];
+
+				/* Memory management */
+	drm_map_t	  **maplist;	/* Vector of pointers to regions   */
+	int		  map_count;	/* Number of mappable regions	   */
+
+	drm_vma_entry_t	  *vmalist;	/* List of vmas (for debugging)	   */
+	drm_lock_data_t	  lock;		/* Information on hardware lock	   */
+
+				/* DMA queues (contexts) */
+	int		  queue_count;	/* Number of active DMA queues	   */
+	int		  queue_reserved; /* Number of reserved DMA queues */
+	int		  queue_slots;	/* Actual length of queuelist	   */
+	drm_queue_t	  **queuelist;	/* Vector of pointers to DMA queues */
+	drm_device_dma_t  *dma;		/* Optional pointer for DMA support */
+
+				/* Context support */
+	int		  irq;		/* Interrupt used by board	   */
+	__volatile__ int  context_flag;	 /* Context swapping flag	   */
+	__volatile__ int  interrupt_flag;/* Interruption handler flag	   */
+	__volatile__ int  dma_flag;	 /* DMA dispatch flag		   */
+	struct timer_list timer;	/* Timer for delaying ctx switch   */
+	wait_queue_head_t context_wait; /* Processes waiting on ctx switch */
+	int		  last_checked;	/* Last context checked for DMA	   */
+	int		  last_context;	/* Last current context		   */
+	unsigned long	  last_switch;	/* jiffies at last context switch  */
+	struct tq_struct  tq;
+	cycles_t	  ctx_start;
+	cycles_t	  lck_start;
+#if DRM_DMA_HISTOGRAM
+	drm_histogram_t	  histo;
+#endif
+	
+				/* Callback to X server for context switch
+				   and for heavy-handed reset. */
+	char		  buf[DRM_BSZ]; /* Output buffer		   */
+	char		  *buf_rp;	/* Read pointer			   */
+	char		  *buf_wp;	/* Write pointer		   */
+	char		  *buf_end;	/* End pointer			   */
+	struct fasync_struct *buf_async;/* Processes waiting for SIGIO	   */
+	wait_queue_head_t buf_readers;	/* Processes waiting to read	   */
+	wait_queue_head_t buf_writers;	/* Processes waiting to ctx switch */
+} drm_device_t;
+
+
+				/* Internal function definitions */
+
+				/* Misc. support (init.c) */
+extern int	     drm_flags;
+extern void	     drm_parse_options(char *s);
+
+
+				/* Device support (fops.c) */
+extern int	     drm_open_helper(struct inode *inode, struct file *filp,
+				     drm_device_t *dev);
+extern int	     drm_flush(struct file *filp);
+extern int	     drm_release(struct inode *inode, struct file *filp);
+extern int	     drm_fasync(int fd, struct file *filp, int on);
+extern ssize_t	     drm_read(struct file *filp, char *buf, size_t count,
+			      loff_t *off);
+extern int	     drm_write_string(drm_device_t *dev, const char *s);
+
+				/* Mapping support (vm.c) */
+extern unsigned long drm_vm_nopage(struct vm_area_struct *vma,
+				   unsigned long address,
+				   int write_access);
+extern unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma,
+				       unsigned long address,
+				       int write_access);
+extern unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma,
+				       unsigned long address,
+				       int write_access);
+extern void	     drm_vm_open(struct vm_area_struct *vma);
+extern void	     drm_vm_close(struct vm_area_struct *vma);
+extern int	     drm_mmap_dma(struct file *filp,
+				  struct vm_area_struct *vma);
+extern int	     drm_mmap(struct file *filp, struct vm_area_struct *vma);
+
+
+				/* Proc support (proc.c) */
+extern int	     drm_proc_init(drm_device_t *dev);
+extern int	     drm_proc_cleanup(void);
+
+				/* Memory management support (memory.c) */
+extern void	     drm_mem_init(void);
+extern int	     drm_mem_info(char *buf, char **start, off_t offset,
+				  int len, int *eof, void *data);
+extern void	     *drm_alloc(size_t size, int area);
+extern void	     *drm_realloc(void *oldpt, size_t oldsize, size_t size,
+				  int area);
+extern char	     *drm_strdup(const char *s, int area);
+extern void	     drm_strfree(const char *s, int area);
+extern void	     drm_free(void *pt, size_t size, int area);
+extern unsigned long drm_alloc_pages(int order, int area);
+extern void	     drm_free_pages(unsigned long address, int order,
+				    int area);
+extern void	     *drm_ioremap(unsigned long offset, unsigned long size);
+extern void	     drm_ioremapfree(void *pt, unsigned long size);
+
+				/* Buffer management support (bufs.c) */
+extern int	     drm_order(unsigned long size);
+extern int	     drm_addmap(struct inode *inode, struct file *filp,
+				unsigned int cmd, unsigned long arg);
+extern int	     drm_addbufs(struct inode *inode, struct file *filp,
+				 unsigned int cmd, unsigned long arg);
+extern int	     drm_infobufs(struct inode *inode, struct file *filp,
+				  unsigned int cmd, unsigned long arg);
+extern int	     drm_markbufs(struct inode *inode, struct file *filp,
+				  unsigned int cmd, unsigned long arg);
+extern int	     drm_freebufs(struct inode *inode, struct file *filp,
+				  unsigned int cmd, unsigned long arg);
+extern int	     drm_mapbufs(struct inode *inode, struct file *filp,
+				 unsigned int cmd, unsigned long arg);
+
+
+				/* Buffer list management support (lists.c) */
+extern int	     drm_waitlist_create(drm_waitlist_t *bl, int count);
+extern int	     drm_waitlist_destroy(drm_waitlist_t *bl);
+extern int	     drm_waitlist_put(drm_waitlist_t *bl, drm_buf_t *buf);
+extern drm_buf_t     *drm_waitlist_get(drm_waitlist_t *bl);
+
+extern int	     drm_freelist_create(drm_freelist_t *bl, int count);
+extern int	     drm_freelist_destroy(drm_freelist_t *bl);
+extern int	     drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl,
+				      drm_buf_t *buf);
+extern drm_buf_t     *drm_freelist_get(drm_freelist_t *bl, int block);
+
+				/* DMA support (gen_dma.c) */
+extern void	     drm_dma_setup(drm_device_t *dev);
+extern void	     drm_dma_takedown(drm_device_t *dev);
+extern void	     drm_free_buffer(drm_device_t *dev, drm_buf_t *buf);
+extern void	     drm_reclaim_buffers(drm_device_t *dev, pid_t pid);
+extern int	     drm_context_switch(drm_device_t *dev, int old, int new);
+extern int	     drm_context_switch_complete(drm_device_t *dev, int new);
+extern void	     drm_wakeup(drm_device_t *dev, drm_buf_t *buf);
+extern void	     drm_clear_next_buffer(drm_device_t *dev);
+extern int	     drm_select_queue(drm_device_t *dev,
+				      void (*wrapper)(unsigned long));
+extern int	     drm_dma_enqueue(drm_device_t *dev, drm_dma_t *dma);
+extern int	     drm_dma_get_buffers(drm_device_t *dev, drm_dma_t *dma);
+#if DRM_DMA_HISTOGRAM
+extern int	     drm_histogram_slot(unsigned long count);
+extern void	     drm_histogram_compute(drm_device_t *dev, drm_buf_t *buf);
+#endif
+
+
+				/* Misc. IOCTL support (ioctl.c) */
+extern int	     drm_irq_busid(struct inode *inode, struct file *filp,
+				   unsigned int cmd, unsigned long arg);
+extern int	     drm_getunique(struct inode *inode, struct file *filp,
+				   unsigned int cmd, unsigned long arg);
+extern int	     drm_setunique(struct inode *inode, struct file *filp,
+				   unsigned int cmd, unsigned long arg);
+
+
+				/* Context IOCTL support (context.c) */
+extern int	     drm_resctx(struct inode *inode, struct file *filp,
+				unsigned int cmd, unsigned long arg);
+extern int	     drm_addctx(struct inode *inode, struct file *filp,
+				unsigned int cmd, unsigned long arg);
+extern int	     drm_modctx(struct inode *inode, struct file *filp,
+				unsigned int cmd, unsigned long arg);
+extern int	     drm_getctx(struct inode *inode, struct file *filp,
+				unsigned int cmd, unsigned long arg);
+extern int	     drm_switchctx(struct inode *inode, struct file *filp,
+				   unsigned int cmd, unsigned long arg);
+extern int	     drm_newctx(struct inode *inode, struct file *filp,
+				unsigned int cmd, unsigned long arg);
+extern int	     drm_rmctx(struct inode *inode, struct file *filp,
+			       unsigned int cmd, unsigned long arg);
+
+
+				/* Drawable IOCTL support (drawable.c) */
+extern int	     drm_adddraw(struct inode *inode, struct file *filp,
+				 unsigned int cmd, unsigned long arg);
+extern int	     drm_rmdraw(struct inode *inode, struct file *filp,
+				unsigned int cmd, unsigned long arg);
+
+
+				/* Authentication IOCTL support (auth.c) */
+extern int	     drm_add_magic(drm_device_t *dev, drm_file_t *priv,
+				   drm_magic_t magic);
+extern int	     drm_remove_magic(drm_device_t *dev, drm_magic_t magic);
+extern int	     drm_getmagic(struct inode *inode, struct file *filp,
+				  unsigned int cmd, unsigned long arg);
+extern int	     drm_authmagic(struct inode *inode, struct file *filp,
+				   unsigned int cmd, unsigned long arg);
+
+
+				/* Locking IOCTL support (lock.c) */
+extern int	     drm_block(struct inode *inode, struct file *filp,
+			       unsigned int cmd, unsigned long arg);
+extern int	     drm_unblock(struct inode *inode, struct file *filp,
+				 unsigned int cmd, unsigned long arg);
+extern int	     drm_lock_take(__volatile__ unsigned int *lock,
+				   unsigned int context);
+extern int	     drm_lock_transfer(drm_device_t *dev,
+				       __volatile__ unsigned int *lock,
+				       unsigned int context);
+extern int	     drm_lock_free(drm_device_t *dev,
+				   __volatile__ unsigned int *lock,
+				   unsigned int context);
+extern int	     drm_finish(struct inode *inode, struct file *filp,
+				unsigned int cmd, unsigned long arg);
+extern int	     drm_flush_unblock(drm_device_t *dev, int context,
+				       drm_lock_flags_t flags);
+extern int	     drm_flush_block_and_flush(drm_device_t *dev, int context,
+					       drm_lock_flags_t flags);
+#endif
+#endif
diff --git a/linux/fops.c b/linux/fops.c
new file mode 100644
index 00000000..403a19bb
--- /dev/null
+++ b/linux/fops.c
@@ -0,0 +1,218 @@
+/* fops.c -- File operations for DRM -*- linux-c -*-
+ * Created: Mon Jan  4 08:58:31 1999 by faith@precisioninsight.com
+ * Revised: Tue Oct 12 08:48:59 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/fops.c,v 1.3 1999/08/20 15:36:45 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/fops.c,v 1.1 1999/09/25 14:37:59 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+/* drm_open is called whenever a process opens /dev/drm. */
+
+int drm_open_helper(struct inode *inode, struct file *filp, drm_device_t *dev)
+{
+	kdev_t	     minor = MINOR(inode->i_rdev);
+	drm_file_t   *priv;
+
+	if (filp->f_flags & O_EXCL)   return -EBUSY; /* No exclusive opens */
+
+	DRM_DEBUG("pid = %d, minor = %d\n", current->pid, minor);
+
+	priv		    = drm_alloc(sizeof(*priv), DRM_MEM_FILES);
+	memset(priv, 0, sizeof(*priv));
+	filp->private_data  = priv;
+	priv->uid	    = current->euid;
+	priv->pid	    = current->pid;
+	priv->minor	    = minor;
+	priv->dev	    = dev;
+	priv->ioctl_count   = 0;
+	priv->authenticated = capable(CAP_SYS_ADMIN);
+
+	down(&dev->struct_sem);
+	if (!dev->file_last) {
+		priv->next	= NULL;
+		priv->prev	= NULL;
+		dev->file_first = priv;
+		dev->file_last	= priv;
+	} else {
+		priv->next	     = NULL;
+		priv->prev	     = dev->file_last;
+		dev->file_last->next = priv;
+		dev->file_last	     = priv;
+	}
+	up(&dev->struct_sem);
+	
+	return 0;
+}
+
+int drm_flush(struct file *filp)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+
+	DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d, f_count = %d\n",
+		  current->pid, dev->device, dev->open_count, filp->f_count);
+	return 0;
+}
+
+/* drm_release is called whenever a process closes /dev/drm*.  Linux calls
+   this only if any mappings have been closed. */
+
+int drm_release(struct inode *inode, struct file *filp)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+
+	DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n",
+		  current->pid, dev->device, dev->open_count);
+
+	if (_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
+	    && dev->lock.pid == current->pid) {
+		DRM_ERROR("Process %d dead, freeing lock for context %d\n",
+			  current->pid,
+			  _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+		drm_lock_free(dev,
+			      &dev->lock.hw_lock->lock,
+			      _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+		
+				/* FIXME: may require heavy-handed reset of
+                                   hardware at this point, possibly
+                                   processed via a callback to the X
+                                   server. */
+	}
+	drm_reclaim_buffers(dev, priv->pid);
+
+	drm_fasync(-1, filp, 0);
+
+	down(&dev->struct_sem);
+	if (priv->prev) priv->prev->next = priv->next;
+	else		dev->file_first	 = priv->next;
+	if (priv->next) priv->next->prev = priv->prev;
+	else		dev->file_last	 = priv->prev;
+	up(&dev->struct_sem);
+	
+	drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
+	
+	return 0;
+}
+
+int drm_fasync(int fd, struct file *filp, int on)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+	int	      retcode;
+	
+	DRM_DEBUG("fd = %d, device = 0x%x\n", fd, dev->device);
+	retcode = fasync_helper(fd, filp, on, &dev->buf_async);
+	if (retcode < 0) return retcode;
+	return 0;
+}
+
+
+/* The drm_read and drm_write_string code (especially that which manages
+   the circular buffer), is based on Alessandro Rubini's LINUX DEVICE
+   DRIVERS (Cambridge: O'Reilly, 1998), pages 111-113. */
+
+ssize_t drm_read(struct file *filp, char *buf, size_t count, loff_t *off)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+	int	      left;
+	int	      avail;
+	int	      send;
+	int	      cur;
+
+	DRM_DEBUG("%p, %p\n", dev->buf_rp, dev->buf_wp);
+	
+	while (dev->buf_rp == dev->buf_wp) {
+		DRM_DEBUG("  sleeping\n");
+		if (filp->f_flags & O_NONBLOCK) {
+			return -EAGAIN;
+		}
+		interruptible_sleep_on(&dev->buf_readers);
+		if (signal_pending(current)) {
+			DRM_DEBUG("  interrupted\n");
+			return -ERESTARTSYS;
+		}
+		DRM_DEBUG("  awake\n");
+	}
+
+	left  = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
+	avail = DRM_BSZ - left;
+	send  = DRM_MIN(avail, count);
+
+	while (send) {
+		if (dev->buf_wp > dev->buf_rp) {
+			cur = DRM_MIN(send, dev->buf_wp - dev->buf_rp);
+		} else {
+			cur = DRM_MIN(send, dev->buf_end - dev->buf_rp);
+		}
+		copy_to_user_ret(buf, dev->buf_rp, cur, -EINVAL);
+		dev->buf_rp += cur;
+		if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf;
+		send -= cur;
+	}
+	
+	wake_up_interruptible(&dev->buf_writers);
+	return DRM_MIN(avail, count);;
+}
+
+int drm_write_string(drm_device_t *dev, const char *s)
+{
+	int left   = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
+	int send   = strlen(s);
+	int count;
+
+	DRM_DEBUG("%d left, %d to send (%p, %p)\n",
+		  left, send, dev->buf_rp, dev->buf_wp);
+	
+	if (left == 1 || dev->buf_wp != dev->buf_rp) {
+		DRM_ERROR("Buffer not empty (%d left, wp = %p, rp = %p)\n",
+			  left,
+			  dev->buf_wp,
+			  dev->buf_rp);
+	}
+
+	while (send) {
+		if (dev->buf_wp >= dev->buf_rp) {
+			count = DRM_MIN(send, dev->buf_end - dev->buf_wp);
+			if (count == left) --count; /* Leave a hole */
+		} else {
+			count = DRM_MIN(send, dev->buf_rp - dev->buf_wp - 1);
+		}
+		strncpy(dev->buf_wp, s, count);
+		dev->buf_wp += count;
+		if (dev->buf_wp == dev->buf_end) dev->buf_wp = dev->buf;
+		send -= count;
+	}
+
+	if (dev->buf_async) kill_fasync(dev->buf_async, SIGIO);
+	DRM_DEBUG("waking\n");
+	wake_up_interruptible(&dev->buf_readers);
+	return 0;
+}
diff --git a/linux/gamma_dma.c b/linux/gamma_dma.c
new file mode 100644
index 00000000..3b159218
--- /dev/null
+++ b/linux/gamma_dma.c
@@ -0,0 +1,802 @@
+/* gamma_dma.c -- DMA support for GMX 2000 -*- linux-c -*-
+ * Created: Fri Mar 19 14:30:16 1999 by faith@precisioninsight.com
+ * Revised: Thu Sep 16 12:55:37 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/gamma_dma.c,v 1.9 1999/09/16 16:56:18 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/gamma_dma.c,v 1.1 1999/09/25 14:38:00 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+#include "gamma_drv.h"
+
+#include <linux/interrupt.h>	/* For task queue support */
+
+
+/* WARNING!!! MAGIC NUMBER!!!  The number of regions already added to the
+   kernel must be specified here.  Currently, the number is 2.	This must
+   match the order the X server uses for instantiating register regions ,
+   or must be passed in a new ioctl. */
+#define GAMMA_REG(reg)						   \
+	(2							   \
+	 + ((reg < 0x1000)					   \
+	    ? 0							   \
+	    : ((reg < 0x10000) ? 1 : ((reg < 0x11000) ? 2 : 3))))
+
+#define GAMMA_OFF(reg)						   \
+	((reg < 0x1000)						   \
+	 ? reg							   \
+	 : ((reg < 0x10000)					   \
+	    ? (reg - 0x1000)					   \
+	    : ((reg < 0x11000)					   \
+	       ? (reg - 0x10000)				   \
+	       : (reg - 0x11000))))
+
+#define GAMMA_BASE(reg)	 ((unsigned long)dev->maplist[GAMMA_REG(reg)]->handle)
+#define GAMMA_ADDR(reg)	 (GAMMA_BASE(reg) + GAMMA_OFF(reg))
+#define GAMMA_DEREF(reg) *(__volatile__ int *)GAMMA_ADDR(reg)
+#define GAMMA_READ(reg)	 GAMMA_DEREF(reg)
+#define GAMMA_WRITE(reg,val) do { GAMMA_DEREF(reg) = val; } while (0)
+
+#define GAMMA_BROADCASTMASK    0x9378
+#define GAMMA_COMMANDINTENABLE 0x0c48
+#define GAMMA_DMAADDRESS       0x0028
+#define GAMMA_DMACOUNT	       0x0030
+#define GAMMA_FILTERMODE       0x8c00
+#define GAMMA_GCOMMANDINTFLAGS 0x0c50
+#define GAMMA_GCOMMANDMODE     0x0c40
+#define GAMMA_GCOMMANDSTATUS   0x0c60
+#define GAMMA_GDELAYTIMER      0x0c38
+#define GAMMA_GDMACONTROL      0x0060
+#define GAMMA_GINTENABLE       0x0808
+#define GAMMA_GINTFLAGS	       0x0810
+#define GAMMA_INFIFOSPACE      0x0018
+#define GAMMA_OUTFIFOWORDS     0x0020
+#define GAMMA_OUTPUTFIFO       0x2000
+#define GAMMA_SYNC	       0x8c40
+#define GAMMA_SYNC_TAG	       0x0188
+
+static inline void gamma_dma_dispatch(drm_device_t *dev, unsigned long address,
+				      unsigned long length)
+{
+	GAMMA_WRITE(GAMMA_DMAADDRESS, virt_to_phys((void *)address));
+	while (GAMMA_READ(GAMMA_GCOMMANDSTATUS) != 4)
+		;
+	GAMMA_WRITE(GAMMA_DMACOUNT, length / 4);
+}
+
+static inline void gamma_dma_quiescent(drm_device_t *dev)
+{
+	while (GAMMA_READ(GAMMA_DMACOUNT))
+		;
+	while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
+		;
+	GAMMA_WRITE(GAMMA_BROADCASTMASK, 3);
+	GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
+	GAMMA_WRITE(GAMMA_SYNC, 0);
+	
+				/* Read from first MX */
+	do {
+		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
+			;
+	} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
+	
+
+				/* Read from second MX */
+	do {
+		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000))
+			;
+	} while (GAMMA_READ(GAMMA_OUTPUTFIFO + 0x10000) != GAMMA_SYNC_TAG);
+}
+
+static inline void gamma_dma_ready(drm_device_t *dev)
+{
+	while (GAMMA_READ(GAMMA_DMACOUNT))
+		;
+}
+
+static inline int gamma_dma_is_ready(drm_device_t *dev)
+{
+	return !GAMMA_READ(GAMMA_DMACOUNT);
+}
+
+static void gamma_dma_service(int irq, void *device, struct pt_regs *regs)
+{
+	drm_device_t	 *dev = (drm_device_t *)device;
+	drm_device_dma_t *dma = dev->dma;
+	
+	atomic_inc(&dev->total_irq);
+	GAMMA_WRITE(GAMMA_GDELAYTIMER, 0xc350/2); /* 0x05S */
+	GAMMA_WRITE(GAMMA_GCOMMANDINTFLAGS, 8);
+	GAMMA_WRITE(GAMMA_GINTFLAGS, 0x2001);
+	if (gamma_dma_is_ready(dev)) {
+				/* Free previous buffer */
+		if (test_and_set_bit(0, &dev->dma_flag)) {
+			atomic_inc(&dma->total_missed_free);
+			return;
+		}
+		if (dma->this_buffer) {
+			drm_free_buffer(dev, dma->this_buffer);
+			dma->this_buffer = NULL;
+		}
+		clear_bit(0, &dev->dma_flag);
+
+				/* Dispatch new buffer */
+		queue_task(&dev->tq, &tq_immediate);
+		mark_bh(IMMEDIATE_BH);
+	}
+}
+
+/* Only called by gamma_dma_schedule. */
+static int gamma_do_dma(drm_device_t *dev, int locked)
+{
+	unsigned long	 address;
+	unsigned long	 length;
+	drm_buf_t	 *buf;
+	int		 retcode = 0;
+	drm_device_dma_t *dma = dev->dma;
+#if DRM_DMA_HISTOGRAM
+	cycles_t	 dma_start, dma_stop;
+#endif
+
+	if (test_and_set_bit(0, &dev->dma_flag)) {
+		atomic_inc(&dma->total_missed_dma);
+		return -EBUSY;
+	}
+	
+#if DRM_DMA_HISTOGRAM
+	dma_start = get_cycles();
+#endif
+
+	if (!dma->next_buffer) {
+		DRM_ERROR("No next_buffer\n");
+		clear_bit(0, &dev->dma_flag);
+		return -EINVAL;
+	}
+
+	buf	= dma->next_buffer;
+	address = (unsigned long)buf->address;
+	length	= buf->used;
+
+	DRM_DEBUG("context %d, buffer %d (%ld bytes)\n",
+		  buf->context, buf->idx, length);
+
+	if (buf->list == DRM_LIST_RECLAIM) {
+		drm_clear_next_buffer(dev);
+		drm_free_buffer(dev, buf);
+		clear_bit(0, &dev->dma_flag);
+		return -EINVAL;
+	}
+
+	if (!length) {
+		DRM_ERROR("0 length buffer\n");
+		drm_clear_next_buffer(dev);
+		drm_free_buffer(dev, buf);
+		clear_bit(0, &dev->dma_flag);
+		return 0;
+	}
+	
+	if (!gamma_dma_is_ready(dev)) {
+		clear_bit(0, &dev->dma_flag);
+		return -EBUSY;
+	}
+
+	if (buf->while_locked) {
+		if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+			DRM_ERROR("Dispatching buffer %d from pid %d"
+				  " \"while locked\", but no lock held\n",
+				  buf->idx, buf->pid);
+		}
+	} else {
+		if (!locked && !drm_lock_take(&dev->lock.hw_lock->lock,
+					      DRM_KERNEL_CONTEXT)) {
+			atomic_inc(&dma->total_missed_lock);
+			clear_bit(0, &dev->dma_flag);
+			return -EBUSY;
+		}
+	}
+
+	if (dev->last_context != buf->context
+	    && !(dev->queuelist[buf->context]->flags
+		 & _DRM_CONTEXT_PRESERVED)) {
+				/* PRE: dev->last_context != buf->context */
+		if (drm_context_switch(dev, dev->last_context, buf->context)) {
+			drm_clear_next_buffer(dev);
+			drm_free_buffer(dev, buf);
+		}
+		retcode = -EBUSY;
+		goto cleanup;
+			
+				/* POST: we will wait for the context
+				   switch and will dispatch on a later call
+				   when dev->last_context == buf->context.
+				   NOTE WE HOLD THE LOCK THROUGHOUT THIS
+				   TIME! */
+	}
+
+	drm_clear_next_buffer(dev);
+	buf->pending	 = 1;
+	buf->waiting	 = 0;
+	buf->list	 = DRM_LIST_PEND;
+#if DRM_DMA_HISTOGRAM
+	buf->time_dispatched = get_cycles();
+#endif
+
+	gamma_dma_dispatch(dev, address, length);
+	drm_free_buffer(dev, dma->this_buffer);
+	dma->this_buffer = buf;
+
+	atomic_add(length, &dma->total_bytes);
+	atomic_inc(&dma->total_dmas);
+
+	if (!buf->while_locked && !dev->context_flag && !locked) {
+		if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
+				  DRM_KERNEL_CONTEXT)) {
+			DRM_ERROR("\n");
+		}
+	}
+cleanup:
+
+	clear_bit(0, &dev->dma_flag);
+
+#if DRM_DMA_HISTOGRAM
+	dma_stop = get_cycles();
+	atomic_inc(&dev->histo.dma[drm_histogram_slot(dma_stop - dma_start)]);
+#endif
+
+	return retcode;
+}
+
+static void gamma_dma_schedule_timer_wrapper(unsigned long dev)
+{
+	gamma_dma_schedule((drm_device_t *)dev, 0);
+}
+
+static void gamma_dma_schedule_tq_wrapper(void *dev)
+{
+	gamma_dma_schedule(dev, 0);
+}
+
+int gamma_dma_schedule(drm_device_t *dev, int locked)
+{
+	int		 next;
+	drm_queue_t	 *q;
+	drm_buf_t	 *buf;
+	int		 retcode   = 0;
+	int		 processed = 0;
+	int		 missed;
+	int		 expire	   = 20;
+	drm_device_dma_t *dma	   = dev->dma;
+#if DRM_DMA_HISTOGRAM
+	cycles_t	 schedule_start;
+#endif
+
+	if (test_and_set_bit(0, &dev->interrupt_flag)) {
+				/* Not reentrant */
+		atomic_inc(&dma->total_missed_sched);
+		return -EBUSY;
+	}
+	missed = atomic_read(&dma->total_missed_sched);
+
+#if DRM_DMA_HISTOGRAM
+	schedule_start = get_cycles();
+#endif
+
+again:
+	if (dev->context_flag) {
+		clear_bit(0, &dev->interrupt_flag);
+		return -EBUSY;
+	}
+	if (dma->next_buffer) {
+				/* Unsent buffer that was previously
+				   selected, but that couldn't be sent
+				   because the lock could not be obtained
+				   or the DMA engine wasn't ready.  Try
+				   again. */
+		atomic_inc(&dma->total_tried);
+		if (!(retcode = gamma_do_dma(dev, locked))) {
+			atomic_inc(&dma->total_hit);
+			++processed;
+		}
+	} else {
+		do {
+			next = drm_select_queue(dev,
+					     gamma_dma_schedule_timer_wrapper);
+			if (next >= 0) {
+				q   = dev->queuelist[next];
+				buf = drm_waitlist_get(&q->waitlist);
+				dma->next_buffer = buf;
+				dma->next_queue	 = q;
+				if (buf && buf->list == DRM_LIST_RECLAIM) {
+					drm_clear_next_buffer(dev);
+					drm_free_buffer(dev, buf);
+				}
+			}
+		} while (next >= 0 && !dma->next_buffer);
+		if (dma->next_buffer) {
+			if (!(retcode = gamma_do_dma(dev, locked))) {
+				++processed;
+			}
+		}
+	}
+
+	if (--expire) {
+		if (missed != atomic_read(&dma->total_missed_sched)) {
+			atomic_inc(&dma->total_lost);
+			if (gamma_dma_is_ready(dev)) goto again;
+		}
+		if (processed && gamma_dma_is_ready(dev)) {
+			atomic_inc(&dma->total_lost);
+			processed = 0;
+			goto again;
+		}
+	}
+	
+	clear_bit(0, &dev->interrupt_flag);
+	
+#if DRM_DMA_HISTOGRAM
+	atomic_inc(&dev->histo.schedule[drm_histogram_slot(get_cycles()
+							   - schedule_start)]);
+#endif
+	return retcode;
+}
+
+static int gamma_dma_priority(drm_device_t *dev, drm_dma_t *d)
+{
+	unsigned long	  address;
+	unsigned long	  length;
+	int		  must_free = 0;
+	int		  retcode   = 0;
+	int		  i;
+	int		  idx;
+	drm_buf_t	  *buf;
+	drm_buf_t	  *last_buf = NULL;
+	drm_device_dma_t  *dma	    = dev->dma;
+	DECLARE_WAITQUEUE(entry, current);
+
+				/* Turn off interrupt handling */
+	while (test_and_set_bit(0, &dev->interrupt_flag)) {
+		schedule();
+		if (signal_pending(current)) return -EINTR;
+	}
+	if (!(d->flags & _DRM_DMA_WHILE_LOCKED)) {
+		while (!drm_lock_take(&dev->lock.hw_lock->lock,
+				      DRM_KERNEL_CONTEXT)) {
+			schedule();
+			if (signal_pending(current)) {
+				clear_bit(0, &dev->interrupt_flag);
+				return -EINTR;
+			}
+		}
+		++must_free;
+	}
+	atomic_inc(&dma->total_prio);
+
+	for (i = 0; i < d->send_count; i++) {
+		idx = d->send_indices[i];
+		if (idx < 0 || idx >= dma->buf_count) {
+			DRM_ERROR("Index %d (of %d max)\n",
+				  d->send_indices[i], dma->buf_count - 1);
+			continue;
+		}
+		buf = dma->buflist[ idx ];
+		if (buf->pid != current->pid) {
+			DRM_ERROR("Process %d using buffer owned by %d\n",
+				  current->pid, buf->pid);
+			retcode = -EINVAL;
+			goto cleanup;
+		}
+		if (buf->list != DRM_LIST_NONE) {
+			DRM_ERROR("Process %d using %d's buffer on list %d\n",
+				  current->pid, buf->pid, buf->list);
+			retcode = -EINVAL;
+			goto cleanup;
+		}
+				/* This isn't a race condition on
+				   buf->list, since our concern is the
+				   buffer reclaim during the time the
+				   process closes the /dev/drm? handle, so
+				   it can't also be doing DMA. */
+		buf->list	  = DRM_LIST_PRIO;
+		buf->used	  = d->send_sizes[i];
+		buf->context	  = d->context;
+		buf->while_locked = d->flags & _DRM_DMA_WHILE_LOCKED;
+		address		  = (unsigned long)buf->address;
+		length		  = buf->used;
+		if (!length) {
+			DRM_ERROR("0 length buffer\n");
+		}
+		if (buf->pending) {
+			DRM_ERROR("Sending pending buffer:"
+				  " buffer %d, offset %d\n",
+				  d->send_indices[i], i);
+			retcode = -EINVAL;
+			goto cleanup;
+		}
+		if (buf->waiting) {
+			DRM_ERROR("Sending waiting buffer:"
+				  " buffer %d, offset %d\n",
+				  d->send_indices[i], i);
+			retcode = -EINVAL;
+			goto cleanup;
+		}
+		buf->pending = 1;
+		
+		if (dev->last_context != buf->context
+		    && !(dev->queuelist[buf->context]->flags
+			 & _DRM_CONTEXT_PRESERVED)) {
+			add_wait_queue(&dev->context_wait, &entry);
+			current->state = TASK_INTERRUPTIBLE;
+				/* PRE: dev->last_context != buf->context */
+			drm_context_switch(dev, dev->last_context,
+					   buf->context);
+				/* POST: we will wait for the context
+				   switch and will dispatch on a later call
+				   when dev->last_context == buf->context.
+				   NOTE WE HOLD THE LOCK THROUGHOUT THIS
+				   TIME! */
+			schedule();
+			current->state = TASK_RUNNING;
+			remove_wait_queue(&dev->context_wait, &entry);
+			if (signal_pending(current)) {
+				retcode = -EINTR;
+				goto cleanup;
+			}
+			if (dev->last_context != buf->context) {
+				DRM_ERROR("Context mismatch: %d %d\n",
+					  dev->last_context,
+					  buf->context);
+			}
+		}
+
+#if DRM_DMA_HISTOGRAM
+		buf->time_queued     = get_cycles();
+		buf->time_dispatched = buf->time_queued;
+#endif
+		gamma_dma_dispatch(dev, address, length);
+		atomic_add(length, &dma->total_bytes);
+		atomic_inc(&dma->total_dmas);
+		
+		if (last_buf) {
+			drm_free_buffer(dev, last_buf);
+		}
+		last_buf = buf;
+	}
+
+
+cleanup:
+	if (last_buf) {
+		gamma_dma_ready(dev);
+		drm_free_buffer(dev, last_buf);
+	}
+	
+	if (must_free && !dev->context_flag) {
+		if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
+				  DRM_KERNEL_CONTEXT)) {
+			DRM_ERROR("\n");
+		}
+	}
+	clear_bit(0, &dev->interrupt_flag);
+	return retcode;
+}
+
+static int gamma_dma_send_buffers(drm_device_t *dev, drm_dma_t *d)
+{
+	DECLARE_WAITQUEUE(entry, current);
+	drm_buf_t	  *last_buf = NULL;
+	int		  retcode   = 0;
+	drm_device_dma_t  *dma	    = dev->dma;
+
+	if (d->flags & _DRM_DMA_BLOCK) {
+		last_buf = dma->buflist[d->send_indices[d->send_count-1]];
+		add_wait_queue(&last_buf->dma_wait, &entry);
+	}
+	
+	if ((retcode = drm_dma_enqueue(dev, d))) {
+		if (d->flags & _DRM_DMA_BLOCK)
+			remove_wait_queue(&last_buf->dma_wait, &entry);
+		return retcode;
+	}
+	
+	gamma_dma_schedule(dev, 0);
+	
+	if (d->flags & _DRM_DMA_BLOCK) {
+		DRM_DEBUG("%d waiting\n", current->pid);
+		current->state = TASK_INTERRUPTIBLE;
+		for (;;) {
+			if (!last_buf->waiting
+			    && !last_buf->pending)
+				break; /* finished */
+			schedule();
+			if (signal_pending(current)) {
+				retcode = -EINTR; /* Can't restart */
+				break;
+			}
+		}
+		current->state = TASK_RUNNING;
+		DRM_DEBUG("%d running\n", current->pid);
+		remove_wait_queue(&last_buf->dma_wait, &entry);
+		if (!retcode
+		    || (last_buf->list==DRM_LIST_PEND && !last_buf->pending)) {
+			if (!waitqueue_active(&last_buf->dma_wait)) {
+				drm_free_buffer(dev, last_buf);
+			}
+		}
+		if (retcode) {
+			DRM_ERROR("ctx%d w%d p%d c%d i%d l%d %d/%d\n",
+				  d->context,
+				  last_buf->waiting,
+				  last_buf->pending,
+				  DRM_WAITCOUNT(dev, d->context),
+				  last_buf->idx,
+				  last_buf->list,
+				  last_buf->pid,
+				  current->pid);
+		}
+	}
+	return retcode;
+}
+
+int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
+	      unsigned long arg)
+{
+	drm_file_t	  *priv	    = filp->private_data;
+	drm_device_t	  *dev	    = priv->dev;
+	drm_device_dma_t  *dma	    = dev->dma;
+	int		  retcode   = 0;
+	drm_dma_t	  d;
+
+	copy_from_user_ret(&d, (drm_dma_t *)arg, sizeof(d), -EFAULT);
+	DRM_DEBUG("%d %d: %d send, %d req\n",
+		  current->pid, d.context, d.send_count, d.request_count);
+
+	if (d.context == DRM_KERNEL_CONTEXT || d.context >= dev->queue_slots) {
+		DRM_ERROR("Process %d using context %d\n",
+			  current->pid, d.context);
+		return -EINVAL;
+	}
+	if (d.send_count < 0 || d.send_count > dma->buf_count) {
+		DRM_ERROR("Process %d trying to send %d buffers (of %d max)\n",
+			  current->pid, d.send_count, dma->buf_count);
+		return -EINVAL;
+	}
+	if (d.request_count < 0 || d.request_count > dma->buf_count) {
+		DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
+			  current->pid, d.request_count, dma->buf_count);
+		return -EINVAL;
+	}
+
+	if (d.send_count) {
+		if (d.flags & _DRM_DMA_PRIORITY)
+			retcode = gamma_dma_priority(dev, &d);
+		else 
+			retcode = gamma_dma_send_buffers(dev, &d);
+	}
+
+	d.granted_count = 0;
+
+	if (!retcode && d.request_count) {
+		retcode = drm_dma_get_buffers(dev, &d);
+	}
+
+	DRM_DEBUG("%d returning, granted = %d\n",
+		  current->pid, d.granted_count);
+	copy_to_user_ret((drm_dma_t *)arg, &d, sizeof(d), -EFAULT);
+
+	return retcode;
+}
+
+int gamma_irq_install(drm_device_t *dev, int irq)
+{
+	int retcode;
+
+	if (!irq)     return -EINVAL;
+	
+	down(&dev->struct_sem);
+	if (dev->irq) {
+		up(&dev->struct_sem);
+		return -EBUSY;
+	}
+	dev->irq = irq;
+	up(&dev->struct_sem);
+	
+	DRM_DEBUG("%d\n", irq);
+
+	dev->context_flag     = 0;
+	dev->interrupt_flag   = 0;
+	dev->dma_flag	      = 0;
+	
+	dev->dma->next_buffer = NULL;
+	dev->dma->next_queue  = NULL;
+	dev->dma->this_buffer = NULL;
+
+	dev->tq.next	      = NULL;
+	dev->tq.sync	      = 0;
+	dev->tq.routine	      = gamma_dma_schedule_tq_wrapper;
+	dev->tq.data	      = dev;
+
+
+				/* Before installing handler */
+	GAMMA_WRITE(GAMMA_GCOMMANDMODE, 0);
+	GAMMA_WRITE(GAMMA_GDMACONTROL, 0);
+	
+				/* Install handler */
+	if ((retcode = request_irq(dev->irq,
+				   gamma_dma_service,
+				   0,
+				   dev->devname,
+				   dev))) {
+		down(&dev->struct_sem);
+		dev->irq = 0;
+		up(&dev->struct_sem);
+		return retcode;
+	}
+
+				/* After installing handler */
+	GAMMA_WRITE(GAMMA_GINTENABLE,	    0x2001);
+	GAMMA_WRITE(GAMMA_COMMANDINTENABLE, 0x0008);
+	GAMMA_WRITE(GAMMA_GDELAYTIMER,	   0x39090);
+	
+	return 0;
+}
+
+int gamma_irq_uninstall(drm_device_t *dev)
+{
+	int irq;
+
+	down(&dev->struct_sem);
+	irq	 = dev->irq;
+	dev->irq = 0;
+	up(&dev->struct_sem);
+	
+	if (!irq) return -EINVAL;
+	
+	DRM_DEBUG("%d\n", irq);
+	
+	GAMMA_WRITE(GAMMA_GDELAYTIMER,	    0);
+	GAMMA_WRITE(GAMMA_COMMANDINTENABLE, 0);
+	GAMMA_WRITE(GAMMA_GINTENABLE,	    0);
+	free_irq(irq, dev);
+
+	return 0;
+}
+
+
+int gamma_control(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_control_t	ctl;
+	int		retcode;
+	
+	copy_from_user_ret(&ctl, (drm_control_t *)arg, sizeof(ctl), -EFAULT);
+	
+	switch (ctl.func) {
+	case DRM_INST_HANDLER:
+		if ((retcode = gamma_irq_install(dev, ctl.irq)))
+			return retcode;
+		break;
+	case DRM_UNINST_HANDLER:
+		if ((retcode = gamma_irq_uninstall(dev)))
+			return retcode;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_file_t	  *priv	  = filp->private_data;
+	drm_device_t	  *dev	  = priv->dev;
+	DECLARE_WAITQUEUE(entry, current);
+	int		  ret	= 0;
+	drm_lock_t	  lock;
+	drm_queue_t	  *q;
+#if DRM_DMA_HISTOGRAM
+	cycles_t	  start;
+
+	dev->lck_start = start = get_cycles();
+#endif
+
+	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+
+	if (lock.context == DRM_KERNEL_CONTEXT) {
+		DRM_ERROR("Process %d using kernel context %d\n",
+			  current->pid, lock.context);
+		return -EINVAL;
+	}
+
+	DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
+		  lock.context, current->pid, dev->lock.hw_lock->lock,
+		  lock.flags);
+
+	if (lock.context < 0 || lock.context >= dev->queue_count)
+		return -EINVAL;
+	q = dev->queuelist[lock.context];
+	
+	ret = drm_flush_block_and_flush(dev, lock.context, lock.flags);
+
+	if (!ret) {
+		if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
+		    != lock.context) {
+			long j = jiffies - dev->lock.lock_time;
+
+			if (j > 0 && j <= DRM_LOCK_SLICE) {
+				/* Can't take lock if we just had it and
+				   there is contention. */
+				current->state = TASK_INTERRUPTIBLE;
+				schedule_timeout(j);
+			}
+		}
+		add_wait_queue(&dev->lock.lock_queue, &entry);
+		for (;;) {
+			if (!dev->lock.hw_lock) {
+				/* Device has been unregistered */
+				ret = -EINTR;
+				break;
+			}
+			if (drm_lock_take(&dev->lock.hw_lock->lock,
+					  lock.context)) {
+				dev->lock.pid	    = current->pid;
+				dev->lock.lock_time = jiffies;
+				atomic_inc(&dev->total_locks);
+				atomic_inc(&q->total_locks);
+				break;	/* Got lock */
+			}
+			
+				/* Contention */
+			atomic_inc(&dev->total_sleeps);
+			current->state = TASK_INTERRUPTIBLE;
+			schedule();
+			if (signal_pending(current)) {
+				ret = -ERESTARTSYS;
+				break;
+			}
+		}
+		current->state = TASK_RUNNING;
+		remove_wait_queue(&dev->lock.lock_queue, &entry);
+	}
+
+	drm_flush_unblock(dev, lock.context, lock.flags); /* cleanup phase */
+	
+	if (!ret) {
+		if (lock.flags & _DRM_LOCK_READY)
+			gamma_dma_ready(dev);
+		if (lock.flags & _DRM_LOCK_QUIESCENT)
+			gamma_dma_quiescent(dev);
+	}
+	DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");
+
+#if DRM_DMA_HISTOGRAM
+	atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
+#endif
+	
+	return ret;
+}
diff --git a/linux/gamma_drv.c b/linux/gamma_drv.c
new file mode 100644
index 00000000..0ae7814c
--- /dev/null
+++ b/linux/gamma_drv.c
@@ -0,0 +1,525 @@
+/* gamma.c -- 3dlabs GMX 2000 driver -*- linux-c -*-
+ * Created: Mon Jan  4 08:58:31 1999 by faith@precisioninsight.com
+ * Revised: Tue Oct 12 08:51:36 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/gamma_drv.c,v 1.17 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/gamma_drv.c,v 1.1 1999/09/25 14:38:00 dawes Exp $
+ *
+ */
+
+#define EXPORT_SYMTAB
+#include "drmP.h"
+#include "gamma_drv.h"
+EXPORT_SYMBOL(gamma_init);
+EXPORT_SYMBOL(gamma_cleanup);
+
+#define GAMMA_NAME	 "gamma"
+#define GAMMA_DESC	 "3dlabs GMX 2000"
+#define GAMMA_DATE	 "19990830"
+#define GAMMA_MAJOR	 0
+#define GAMMA_MINOR	 0
+#define GAMMA_PATCHLEVEL 5
+
+static drm_device_t	      gamma_device;
+
+static struct file_operations gamma_fops = {
+	open:	 gamma_open,
+	flush:	 drm_flush,
+	release: gamma_release,
+	ioctl:	 gamma_ioctl,
+	mmap:	 drm_mmap,
+	read:	 drm_read,
+	fasync:	 drm_fasync,
+};
+
+static struct miscdevice      gamma_misc = {
+	minor: MISC_DYNAMIC_MINOR,
+	name:  GAMMA_NAME,
+	fops:  &gamma_fops,
+};
+
+static drm_ioctl_desc_t	      gamma_ioctls[] = {
+	[DRM_IOCTL_NR(DRM_IOCTL_VERSION)]    = { gamma_version,	  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique,	  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)]  = { drm_getmagic,	  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)]  = { drm_irq_busid,	  0, 1 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)]	     = { drm_block,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]    = { drm_unblock,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]    = { gamma_control,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]    = { drm_addmap,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)]   = { drm_addbufs,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)]  = { drm_markbufs,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)]  = { drm_infobufs,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)]   = { drm_mapbufs,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)]  = { drm_freebufs,	  1, 0 },
+	
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]    = { drm_addctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]     = { drm_rmctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]    = { drm_modctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)]    = { drm_getctx,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { drm_switchctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)]    = { drm_newctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)]    = { drm_resctx,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)]   = { drm_adddraw,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)]    = { drm_rmdraw,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_DMA)]	     = { gamma_dma,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_LOCK)]	     = { gamma_lock,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)]     = { gamma_unlock,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_FINISH)]     = { drm_finish,	  1, 0 },
+};
+#define GAMMA_IOCTL_COUNT DRM_ARRAY_SIZE(gamma_ioctls)
+
+#ifdef MODULE
+int			      init_module(void);
+void			      cleanup_module(void);
+static char		      *gamma = NULL;
+
+MODULE_AUTHOR("Precision Insight, Inc., Cedar Park, Texas.");
+MODULE_DESCRIPTION("3dlabs GMX 2000");
+MODULE_PARM(gamma, "s");
+
+/* init_module is called when insmod is used to load the module */
+
+int init_module(void)
+{
+	return gamma_init();
+}
+
+/* cleanup_module is called when rmmod is used to unload the module */
+
+void cleanup_module(void)
+{
+	gamma_cleanup();
+}
+#endif
+
+#ifndef MODULE
+/* gamma_setup is called by the kernel to parse command-line options passed
+ * via the boot-loader (e.g., LILO).  It calls the insmod option routine,
+ * drm_parse_drm.
+ *
+ * This is not currently supported, since it requires changes to
+ * linux/init/main.c. */
+ 
+
+void __init gamma_setup(char *str, int *ints)
+{
+	if (ints[0] != 0) {
+		DRM_ERROR("Illegal command line format, ignored\n");
+		return;
+	}
+	drm_parse_options(str);
+}
+#endif
+
+static int gamma_setup(drm_device_t *dev)
+{
+	int i;
+	
+	atomic_set(&dev->ioctl_count, 0);
+	atomic_set(&dev->vma_count, 0);
+	dev->buf_use	  = 0;
+	atomic_set(&dev->buf_alloc, 0);
+
+	drm_dma_setup(dev);
+
+	atomic_set(&dev->total_open, 0);
+	atomic_set(&dev->total_close, 0);
+	atomic_set(&dev->total_ioctl, 0);
+	atomic_set(&dev->total_irq, 0);
+	atomic_set(&dev->total_ctx, 0);
+	atomic_set(&dev->total_locks, 0);
+	atomic_set(&dev->total_unlocks, 0);
+	atomic_set(&dev->total_contends, 0);
+	atomic_set(&dev->total_sleeps, 0);
+
+	for (i = 0; i < DRM_HASH_SIZE; i++) {
+		dev->magiclist[i].head = NULL;
+		dev->magiclist[i].tail = NULL;
+	}
+	dev->maplist	    = NULL;
+	dev->map_count	    = 0;
+	dev->vmalist	    = NULL;
+	dev->lock.hw_lock   = NULL;
+	init_waitqueue_head(&dev->lock.lock_queue);
+	dev->queue_count    = 0;
+	dev->queue_reserved = 0;
+	dev->queue_slots    = 0;
+	dev->queuelist	    = NULL;
+	dev->irq	    = 0;
+	dev->context_flag   = 0;
+	dev->interrupt_flag = 0;
+	dev->dma_flag	    = 0;
+	dev->last_context   = 0;
+	dev->last_switch    = 0;
+	dev->last_checked   = 0;
+	init_timer(&dev->timer);
+	init_waitqueue_head(&dev->context_wait);
+#if DRM_DMA_HISTO
+	memset(&dev->histo, 0, sizeof(dev->histo));
+#endif
+	dev->ctx_start	    = 0;
+	dev->lck_start	    = 0;
+	
+	dev->buf_rp	  = dev->buf;
+	dev->buf_wp	  = dev->buf;
+	dev->buf_end	  = dev->buf + DRM_BSZ;
+	dev->buf_async	  = NULL;
+	init_waitqueue_head(&dev->buf_readers);
+	init_waitqueue_head(&dev->buf_writers);
+			
+	DRM_DEBUG("\n");
+			
+	/* The kernel's context could be created here, but is now created
+	   in drm_dma_enqueue.	This is more resource-efficient for
+	   hardware that does not do DMA, but may mean that
+	   drm_select_queue fails between the time the interrupt is
+	   initialized and the time the queues are initialized. */
+			
+	return 0;
+}
+
+
+static int gamma_takedown(drm_device_t *dev)
+{
+	int		  i;
+	drm_magic_entry_t *pt, *next;
+	drm_map_t	  *map;
+	drm_vma_entry_t	  *vma, *vma_next;
+
+	DRM_DEBUG("\n");
+
+	if (dev->irq) gamma_irq_uninstall(dev);
+	
+	down(&dev->struct_sem);
+	del_timer(&dev->timer);
+	
+	if (dev->devname) {
+		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
+		dev->devname = NULL;
+	}
+	
+	if (dev->unique) {
+		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
+		dev->unique = NULL;
+		dev->unique_len = 0;
+	}
+				/* Clear pid list */
+	for (i = 0; i < DRM_HASH_SIZE; i++) {
+		for (pt = dev->magiclist[i].head; pt; pt = next) {
+			next = pt->next;
+			drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
+		}
+		dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
+	}
+	
+				/* Clear vma list (only built for debugging) */
+	if (dev->vmalist) {
+		for (vma = dev->vmalist; vma; vma = vma_next) {
+			vma_next = vma->next;
+			drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
+		}
+		dev->vmalist = NULL;
+	}
+	
+				/* Clear map area and mtrr information */
+	if (dev->maplist) {
+		for (i = 0; i < dev->map_count; i++) {
+			map = dev->maplist[i];
+			switch (map->type) {
+			case _DRM_REGISTERS:
+			case _DRM_FRAME_BUFFER:
+#ifdef CONFIG_MTRR
+				if (map->mtrr >= 0) {
+					int retcode;
+					retcode = mtrr_del(map->mtrr,
+							   map->offset,
+							   map->size);
+					DRM_DEBUG("mtrr_del = %d\n", retcode);
+				}
+#endif
+				drm_ioremapfree(map->handle, map->size);
+				break;
+			case _DRM_SHM:
+				drm_free_pages((unsigned long)map->handle,
+					       drm_order(map->size)
+					       - PAGE_SHIFT,
+					       DRM_MEM_SAREA);
+				break;
+			}
+			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+		}
+		drm_free(dev->maplist,
+			 dev->map_count * sizeof(*dev->maplist),
+			 DRM_MEM_MAPS);
+		dev->maplist   = NULL;
+		dev->map_count = 0;
+	}
+	
+	if (dev->queuelist) {
+		for (i = 0; i < dev->queue_count; i++) {
+			drm_waitlist_destroy(&dev->queuelist[i]->waitlist);
+			if (dev->queuelist[i]) {
+				drm_free(dev->queuelist[i],
+					 sizeof(*dev->queuelist[0]),
+					 DRM_MEM_QUEUES);
+				dev->queuelist[i] = NULL;
+			}
+		}
+		drm_free(dev->queuelist,
+			 dev->queue_slots * sizeof(*dev->queuelist),
+			 DRM_MEM_QUEUES);
+		dev->queuelist	 = NULL;
+	}
+
+	drm_dma_takedown(dev);
+
+	dev->queue_count     = 0;
+	if (dev->lock.hw_lock) {
+		dev->lock.hw_lock    = NULL; /* SHM removed */
+		dev->lock.pid	     = 0;
+		wake_up_interruptible(&dev->lock.lock_queue);
+	}
+	up(&dev->struct_sem);
+	
+	return 0;
+}
+
+/* gamma_init is called via init_module at module load time, or via
+ * linux/init/main.c (this is not currently supported). */
+
+int gamma_init(void)
+{
+	int		      retcode;
+	drm_device_t	      *dev = &gamma_device;
+
+	DRM_DEBUG("\n");
+
+	memset((void *)dev, 0, sizeof(*dev));
+	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
+	sema_init(&dev->struct_sem, 1);
+	
+#ifdef MODULE
+	drm_parse_options(gamma);
+#endif
+
+	if ((retcode = misc_register(&gamma_misc))) {
+		DRM_ERROR("Cannot register \"%s\"\n", GAMMA_NAME);
+		return retcode;
+	}
+	dev->device = MKDEV(MISC_MAJOR, gamma_misc.minor);
+	dev->name   = GAMMA_NAME;
+
+	drm_mem_init();
+	drm_proc_init(dev);
+
+	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
+		 GAMMA_NAME,
+		 GAMMA_MAJOR,
+		 GAMMA_MINOR,
+		 GAMMA_PATCHLEVEL,
+		 GAMMA_DATE,
+		 gamma_misc.minor);
+	
+	return 0;
+}
+
+/* gamma_cleanup is called via cleanup_module at module unload time. */
+
+void gamma_cleanup(void)
+{
+	drm_device_t	      *dev = &gamma_device;
+
+	DRM_DEBUG("\n");
+	
+	drm_proc_cleanup();
+	if (misc_deregister(&gamma_misc)) {
+		DRM_ERROR("Cannot unload module\n");
+	} else {
+		DRM_INFO("Module unloaded\n");
+	}
+	gamma_takedown(dev);
+}
+
+int gamma_version(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_version_t version;
+	int	      len;
+
+	copy_from_user_ret(&version,
+			   (drm_version_t *)arg,
+			   sizeof(version),
+			   -EFAULT);
+
+#define DRM_COPY(name,value)				     \
+	len = strlen(value);				     \
+	if (len > name##_len) len = name##_len;		     \
+	name##_len = strlen(value);			     \
+	if (len && name) {				     \
+		copy_to_user_ret(name, value, len, -EFAULT); \
+	}
+
+	version.version_major	   = GAMMA_MAJOR;
+	version.version_minor	   = GAMMA_MINOR;
+	version.version_patchlevel = GAMMA_PATCHLEVEL;
+
+	DRM_COPY(version.name, GAMMA_NAME);
+	DRM_COPY(version.date, GAMMA_DATE);
+	DRM_COPY(version.desc, GAMMA_DESC);
+
+	copy_to_user_ret((drm_version_t *)arg,
+			 &version,
+			 sizeof(version),
+			 -EFAULT);
+	return 0;
+}
+
+int gamma_open(struct inode *inode, struct file *filp)
+{
+	drm_device_t  *dev    = &gamma_device;
+	int	      retcode = 0;
+	
+	DRM_DEBUG("open_count = %d\n", dev->open_count);
+	if (!(retcode = drm_open_helper(inode, filp, dev))) {
+		MOD_INC_USE_COUNT;
+		atomic_inc(&dev->total_open);
+		spin_lock(&dev->count_lock);
+		if (!dev->open_count++) {
+			spin_unlock(&dev->count_lock);
+			return gamma_setup(dev);
+		}
+		spin_unlock(&dev->count_lock);
+	}
+	return retcode;
+}
+
+int gamma_release(struct inode *inode, struct file *filp)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+	int	      retcode = 0;
+
+	DRM_DEBUG("open_count = %d\n", dev->open_count);
+	if (!(retcode = drm_release(inode, filp))) {
+		MOD_DEC_USE_COUNT;
+		atomic_inc(&dev->total_close);
+		spin_lock(&dev->count_lock);
+		if (!--dev->open_count) {
+			if (atomic_read(&dev->ioctl_count) || dev->blocked) {
+				DRM_ERROR("Device busy: %d %d\n",
+					  atomic_read(&dev->ioctl_count),
+					  dev->blocked);
+				spin_unlock(&dev->count_lock);
+				return -EBUSY;
+			}
+			spin_unlock(&dev->count_lock);
+			return gamma_takedown(dev);
+		}
+		spin_unlock(&dev->count_lock);
+	}
+	return retcode;
+}
+
+/* drm_ioctl is called whenever a process performs an ioctl on /dev/drm. */
+
+int gamma_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	int		 nr	 = DRM_IOCTL_NR(cmd);
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	int		 retcode = 0;
+	drm_ioctl_desc_t *ioctl;
+	drm_ioctl_t	 *func;
+
+	atomic_inc(&dev->ioctl_count);
+	atomic_inc(&dev->total_ioctl);
+	++priv->ioctl_count;
+	
+	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
+		  current->pid, cmd, nr, dev->device, priv->authenticated);
+
+	if (nr >= GAMMA_IOCTL_COUNT) {
+		retcode = -EINVAL;
+	} else {
+		ioctl	  = &gamma_ioctls[nr];
+		func	  = ioctl->func;
+
+		if (!func) {
+			DRM_DEBUG("no function\n");
+			retcode = -EINVAL;
+		} else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN))
+			    || (ioctl->auth_needed && !priv->authenticated)) {
+			retcode = -EACCES;
+		} else {
+			retcode = (func)(inode, filp, cmd, arg);
+		}
+	}
+	
+	atomic_dec(&dev->ioctl_count);
+	return retcode;
+}
+
+
+int gamma_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
+		 unsigned long arg)
+{
+	drm_file_t	  *priv	  = filp->private_data;
+	drm_device_t	  *dev	  = priv->dev;
+	drm_lock_t	  lock;
+
+	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	
+	if (lock.context == DRM_KERNEL_CONTEXT) {
+		DRM_ERROR("Process %d using kernel context %d\n",
+			  current->pid, lock.context);
+		return -EINVAL;
+	}
+
+	DRM_DEBUG("%d frees lock (%d holds)\n",
+		  lock.context,
+		  _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+	atomic_inc(&dev->total_unlocks);
+	if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
+		atomic_inc(&dev->total_contends);
+	drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
+	gamma_dma_schedule(dev, 1);
+	if (!dev->context_flag) {
+		if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
+				  DRM_KERNEL_CONTEXT)) {
+			DRM_ERROR("\n");
+		}
+	}
+#if DRM_DMA_HISTOGRAM
+	atomic_inc(&dev->histo.lhld[drm_histogram_slot(get_cycles()
+						       - dev->lck_start)]);
+#endif
+	
+	return 0;
+}
diff --git a/linux/gamma_drv.h b/linux/gamma_drv.h
new file mode 100644
index 00000000..15e77dca
--- /dev/null
+++ b/linux/gamma_drv.h
@@ -0,0 +1,58 @@
+/* gamma_drv.h -- Private header for 3dlabs GMX 2000 driver -*- linux-c -*-
+ * Created: Mon Jan  4 10:05:05 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 09:24:27 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All rights reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/gamma_drv.h,v 1.4 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/gamma_drv.h,v 1.1 1999/09/25 14:38:00 dawes Exp $
+ * 
+ */
+
+#ifndef _GAMMA_DRV_H_
+#define _GAMMA_DRV_H_
+
+				/* gamma_drv.c */
+extern int  gamma_init(void);
+extern void gamma_cleanup(void);
+extern int  gamma_version(struct inode *inode, struct file *filp,
+			  unsigned int cmd, unsigned long arg);
+extern int  gamma_open(struct inode *inode, struct file *filp);
+extern int  gamma_release(struct inode *inode, struct file *filp);
+extern int  gamma_ioctl(struct inode *inode, struct file *filp,
+			unsigned int cmd, unsigned long arg);
+extern int  gamma_lock(struct inode *inode, struct file *filp,
+		       unsigned int cmd, unsigned long arg);
+extern int  gamma_unlock(struct inode *inode, struct file *filp,
+			 unsigned int cmd, unsigned long arg);
+
+				/* gamma_dma.c */
+extern int  gamma_dma_schedule(drm_device_t *dev, int locked);
+extern int  gamma_dma(struct inode *inode, struct file *filp,
+		      unsigned int cmd, unsigned long arg);
+extern int  gamma_irq_install(drm_device_t *dev, int irq);
+extern int  gamma_irq_uninstall(drm_device_t *dev);
+extern int  gamma_control(struct inode *inode, struct file *filp,
+			  unsigned int cmd, unsigned long arg);
+
+#endif
diff --git a/linux/init.c b/linux/init.c
new file mode 100644
index 00000000..340ba8f5
--- /dev/null
+++ b/linux/init.c
@@ -0,0 +1,99 @@
+/* init.c -- Setup/Cleanup for DRM -*- linux-c -*-
+ * Created: Mon Jan  4 08:58:31 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 09:27:02 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/init.c,v 1.3 1999/08/20 15:07:01 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/init.c,v 1.1 1999/09/25 14:38:01 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+int			      drm_flags		= 0;
+
+/* drm_parse_option parses a single option.  See description for
+   drm_parse_drm for details. */
+
+static void drm_parse_option(char *s)
+{
+	char *c, *r;
+	
+	DRM_DEBUG("\"%s\"\n", s);
+	if (!s || !*s) return;
+	for (c = s; *c && *c != ':'; c++); /* find : or \0 */
+	if (*c) r = c + 1; else r = NULL;  /* remember remainder */
+	*c = '\0';			   /* terminate */
+	if (!strcmp(s, "noctx")) {
+		drm_flags |= DRM_FLAG_NOCTX;
+		DRM_INFO("Server-mediated context switching OFF\n");
+		return;
+	}
+	if (!strcmp(s, "debug")) {
+		drm_flags |= DRM_FLAG_DEBUG;
+		DRM_INFO("Debug messages ON\n");
+		return;
+	}
+	DRM_ERROR("\"%s\" is not a valid option\n", s);
+	return;
+}
+
+/* drm_parse_options parse the insmod "drm=" options, or the command-line
+ * options passed to the kernel via LILO.  The grammar of the format is as
+ * follows:
+ *
+ * drm		::= 'drm=' option_list
+ * option_list	::= option [ ';' option_list ]
+ * option	::= 'device:' major
+ *		|   'debug' 
+ *		|   'noctx'
+ * major	::= INTEGER
+ *
+ * Note that 's' contains option_list without the 'drm=' part.
+ *
+ * device=major,minor specifies the device number used for /dev/drm
+ *	  if major == 0 then the misc device is used
+ *	  if major == 0 and minor == 0 then dynamic misc allocation is used
+ * debug=on specifies that debugging messages will be printk'd
+ * debug=trace specifies that each function call will be logged via printk
+ * debug=off turns off all debugging options
+ *
+ */
+
+void drm_parse_options(char *s)
+{
+	char *h, *t, *n;
+	
+	DRM_DEBUG("\"%s\"\n", s ?: "");
+	if (!s || !*s) return;
+
+	for (h = t = n = s; h && *h; h = n) {
+		for (; *t && *t != ';'; t++);	       /* find ; or \0 */
+		if (*t) n = t + 1; else n = NULL;      /* remember next */
+		*t = '\0';			       /* terminate */
+		drm_parse_option(h);		       /* parse */
+	}
+}
+
diff --git a/linux/ioctl.c b/linux/ioctl.c
new file mode 100644
index 00000000..886ef661
--- /dev/null
+++ b/linux/ioctl.c
@@ -0,0 +1,91 @@
+/* ioctl.c -- IOCTL processing for DRM -*- linux-c -*-
+ * Created: Fri Jan  8 09:01:26 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 09:27:02 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/ioctl.c,v 1.3 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/ioctl.c,v 1.1 1999/09/25 14:38:01 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+int drm_irq_busid(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_irq_busid_t p;
+	struct pci_dev	*dev;
+
+	copy_from_user_ret(&p, (drm_irq_busid_t *)arg, sizeof(p), -EFAULT);
+	dev = pci_find_slot(p.busnum, PCI_DEVFN(p.devnum, p.funcnum));
+	if (dev) p.irq = dev->irq;
+	else	 p.irq = 0;
+	DRM_DEBUG("%d:%d:%d => IRQ %d\n",
+		  p.busnum, p.devnum, p.funcnum, p.irq);
+	copy_to_user_ret((drm_irq_busid_t *)arg, &p, sizeof(p), -EFAULT);
+	return 0;
+}
+
+int drm_getunique(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_unique_t	 u;
+
+	copy_from_user_ret(&u, (drm_unique_t *)arg, sizeof(u), -EFAULT);
+	if (u.unique_len >= dev->unique_len) {
+		copy_to_user_ret(u.unique, dev->unique, dev->unique_len,
+				 -EFAULT);
+	}
+	u.unique_len = dev->unique_len;
+	copy_to_user_ret((drm_unique_t *)arg, &u, sizeof(u), -EFAULT);
+	return 0;
+}
+
+int drm_setunique(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_unique_t	 u;
+
+	if (dev->unique_len || dev->unique) return -EBUSY;
+
+	copy_from_user_ret(&u, (drm_unique_t *)arg, sizeof(u), -EFAULT);
+	if (!u.unique_len) return -EINVAL;
+	
+	dev->unique_len = u.unique_len;
+	dev->unique	= drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
+	copy_from_user_ret(dev->unique, u.unique, dev->unique_len,
+			   -EFAULT);
+	dev->unique[dev->unique_len] = '\0';
+
+	dev->devname = drm_alloc(strlen(dev->name) + strlen(dev->unique) + 2,
+				 DRM_MEM_DRIVER);
+	sprintf(dev->devname, "%s@%s", dev->name, dev->unique);
+
+	return 0;
+}
diff --git a/linux/lists.c b/linux/lists.c
new file mode 100644
index 00000000..3d1263d0
--- /dev/null
+++ b/linux/lists.c
@@ -0,0 +1,252 @@
+/* lists.c -- Buffer list handling routines -*- linux-c -*-
+ * Created: Mon Apr 19 20:54:22 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 09:27:01 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/lists.c,v 1.3 1999/08/20 15:07:02 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/lists.c,v 1.1 1999/09/25 14:38:01 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+int drm_waitlist_create(drm_waitlist_t *bl, int count)
+{
+	DRM_DEBUG("%d\n", count);
+	if (bl->count) return -EINVAL;
+	
+	bl->count      = count;
+	bl->bufs       = drm_alloc((bl->count + 2) * sizeof(*bl->bufs),
+				   DRM_MEM_BUFLISTS);
+	bl->rp	       = bl->bufs;
+	bl->wp	       = bl->bufs;
+	bl->end	       = &bl->bufs[bl->count+1];
+	bl->write_lock = SPIN_LOCK_UNLOCKED;
+	bl->read_lock  = SPIN_LOCK_UNLOCKED;
+	return 0;
+}
+
+int drm_waitlist_destroy(drm_waitlist_t *bl)
+{
+	DRM_DEBUG("\n");
+	if (bl->rp != bl->wp) return -EINVAL;
+	if (bl->bufs) drm_free(bl->bufs,
+			       (bl->count + 2) * sizeof(*bl->bufs),
+			       DRM_MEM_BUFLISTS);
+	bl->count = 0;
+	bl->bufs  = NULL;
+	bl->rp	  = NULL;
+	bl->wp	  = NULL;
+	bl->end	  = NULL;
+	return 0;
+}
+
+int drm_waitlist_put(drm_waitlist_t *bl, drm_buf_t *buf)
+{							
+	int	      left;
+	unsigned long flags;
+
+	left = DRM_LEFTCOUNT(bl);
+	DRM_DEBUG("put %d (%d left, rp = %p, wp = %p)\n",
+		  buf->idx, left, bl->rp, bl->wp);
+	if (!left) {
+		DRM_ERROR("Overflow while adding buffer %d from pid %d\n",
+			  buf->idx, buf->pid);
+		return -EINVAL;
+	}
+#if DRM_DMA_HISTOGRAM
+	buf->time_queued = get_cycles();
+#endif
+	buf->list	 = DRM_LIST_WAIT;
+	
+	spin_lock_irqsave(&bl->write_lock, flags);
+	*bl->wp = buf;
+	if (++bl->wp >= bl->end) bl->wp = bl->bufs;
+	spin_unlock_irqrestore(&bl->write_lock, flags);
+	
+	return 0;
+}
+
+drm_buf_t *drm_waitlist_get(drm_waitlist_t *bl)
+{
+	drm_buf_t     *buf;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bl->read_lock, flags);
+	buf = *bl->rp;
+	if (bl->rp == bl->wp) {
+		spin_unlock_irqrestore(&bl->read_lock, flags);
+		return NULL;
+	}				     
+	if (++bl->rp >= bl->end) bl->rp = bl->bufs;
+	spin_unlock_irqrestore(&bl->read_lock, flags);
+	
+	DRM_DEBUG("get %d\n", buf->idx);
+	return buf;
+}
+
+int drm_freelist_create(drm_freelist_t *bl, int count)
+{
+	DRM_DEBUG("\n");
+	atomic_set(&bl->count, 0);
+	bl->next      = NULL;
+	init_waitqueue_head(&bl->waiting);
+	bl->low_mark  = 0;
+	bl->high_mark = 0;
+	atomic_set(&bl->wfh,   0);
+	++bl->initialized;
+	return 0;
+}
+
+int drm_freelist_destroy(drm_freelist_t *bl)
+{
+	DRM_DEBUG("\n");
+	atomic_set(&bl->count, 0);
+	bl->next = NULL;
+	return 0;
+}
+
+int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
+{
+	unsigned int	 old;
+	unsigned int	 new;
+	char		 failed;
+	int		 count = 0;
+	drm_device_dma_t *dma = dev->dma;
+
+	if (!dma) {
+		DRM_ERROR("No DMA support\n");
+		return 1;
+	}
+
+	if (buf->waiting || buf->pending || buf->list == DRM_LIST_FREE) {
+		DRM_ERROR("Freed buffer %d: w%d, p%d, l%d\n",
+			  buf->idx, buf->waiting, buf->pending, buf->list);
+	}
+	DRM_DEBUG("%d, count = %d, wfh = %d, w%d, p%d\n",
+		  buf->idx, atomic_read(&bl->count), atomic_read(&bl->wfh),
+		  buf->waiting, buf->pending);
+	if (!bl) return 1;
+#if DRM_DMA_HISTOGRAM
+	buf->time_freed = get_cycles();
+	drm_histogram_compute(dev, buf);
+#endif
+	buf->list	= DRM_LIST_FREE;
+	do {
+		old	  = (unsigned long)bl->next;
+		buf->next = (void *)old;
+		new	  = (unsigned long)buf;
+		_DRM_CAS(&bl->next, old, new, failed);
+		if (++count > DRM_LOOPING_LIMIT) {
+			DRM_ERROR("Looping\n");
+			return 1;
+		}
+	} while (failed);
+	atomic_inc(&bl->count);
+	if (atomic_read(&bl->count) > dma->buf_count) {
+		DRM_ERROR("%d of %d buffers free after addition of %d\n",
+			  atomic_read(&bl->count), dma->buf_count, buf->idx);
+		return 1;
+	}
+				/* Check for high water mark */
+	if (atomic_read(&bl->wfh) && atomic_read(&bl->count)>=bl->high_mark) {
+		atomic_set(&bl->wfh, 0);
+		wake_up_interruptible(&bl->waiting);
+	}
+	return 0;
+}
+
+static drm_buf_t *drm_freelist_try(drm_freelist_t *bl)
+{
+	unsigned int	  old;
+	unsigned int	  new;
+	char		  failed;
+	drm_buf_t	  *buf;
+	int		  count = 0;
+
+	if (!bl) return NULL;
+	
+				/* Get buffer */
+	do {
+		old = (unsigned int)bl->next;
+		if (!old) {
+			return NULL;
+		}
+		new = (unsigned long)bl->next->next;
+		_DRM_CAS(&bl->next, old, new, failed);
+		if (++count > DRM_LOOPING_LIMIT) {
+			DRM_ERROR("Looping\n");
+			return NULL;
+		}
+	} while (failed);
+	atomic_dec(&bl->count);
+	
+	buf	  = (drm_buf_t *)old;
+	buf->next = NULL;
+	buf->list = DRM_LIST_NONE;
+	DRM_DEBUG("%d, count = %d, wfh = %d, w%d, p%d\n",
+		  buf->idx, atomic_read(&bl->count), atomic_read(&bl->wfh),
+		  buf->waiting, buf->pending);
+	if (buf->waiting || buf->pending) {
+		DRM_ERROR("Free buffer %d: w%d, p%d, l%d\n",
+			  buf->idx, buf->waiting, buf->pending, buf->list);
+	}
+	
+	return buf;
+}
+
+drm_buf_t *drm_freelist_get(drm_freelist_t *bl, int block)
+{
+	drm_buf_t	  *buf	= NULL;
+	DECLARE_WAITQUEUE(entry, current);
+
+	if (!bl || !bl->initialized) return NULL;
+	
+				/* Check for low water mark */
+	if (atomic_read(&bl->count) <= bl->low_mark) /* Became low */
+		atomic_set(&bl->wfh, 1);
+	if (atomic_read(&bl->wfh)) {
+		DRM_DEBUG("Block = %d, count = %d, wfh = %d\n",
+			  block, atomic_read(&bl->count),
+			  atomic_read(&bl->wfh));
+		if (block) {
+			add_wait_queue(&bl->waiting, &entry);
+			current->state = TASK_INTERRUPTIBLE;
+			for (;;) {
+				if (!atomic_read(&bl->wfh)
+				    && (buf = drm_freelist_try(bl))) break;
+				schedule();
+				if (signal_pending(current)) break;
+			}
+			current->state = TASK_RUNNING;
+			remove_wait_queue(&bl->waiting, &entry);
+		}
+		return buf;
+	}
+		
+	DRM_DEBUG("Count = %d, wfh = %d\n",
+		  atomic_read(&bl->count), atomic_read(&bl->wfh));
+	return drm_freelist_try(bl);
+}
diff --git a/linux/lock.c b/linux/lock.c
new file mode 100644
index 00000000..ab1c0742
--- /dev/null
+++ b/linux/lock.c
@@ -0,0 +1,231 @@
+/* lock.c -- IOCTLs for locking -*- linux-c -*-
+ * Created: Tue Feb  2 08:37:54 1999 by faith@precisioninsight.com
+ * Revised: Tue Oct 12 08:51:06 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/lock.c,v 1.5 1999/08/30 13:05:00 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/lock.c,v 1.1 1999/09/25 14:38:01 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+int drm_block(struct inode *inode, struct file *filp, unsigned int cmd,
+	      unsigned long arg)
+{
+	DRM_DEBUG("\n");
+	return 0;
+}
+
+int drm_unblock(struct inode *inode, struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	DRM_DEBUG("\n");
+	return 0;
+}
+
+int drm_lock_take(__volatile__ unsigned int *lock, unsigned int context)
+{
+	unsigned int old;
+	unsigned int new;
+	char	     failed;
+
+	DRM_DEBUG("%d attempts\n", context);
+	do {
+		old = *lock;
+		if (old & _DRM_LOCK_HELD) new = old | _DRM_LOCK_CONT;
+		else			  new = context | _DRM_LOCK_HELD;
+		_DRM_CAS(lock, old, new, failed);
+	} while (failed);
+	if (_DRM_LOCKING_CONTEXT(old) == context) {
+		if (old & _DRM_LOCK_HELD) {
+			if (context != DRM_KERNEL_CONTEXT) {
+				DRM_ERROR("%d holds heavyweight lock\n",
+					  context);
+			}
+			return 0;
+		}
+	}
+	if (new == (context | _DRM_LOCK_HELD)) {
+				/* Have lock */
+		DRM_DEBUG("%d\n", context);
+		return 1;
+	}
+	DRM_DEBUG("%d unable to get lock held by %d\n",
+		  context, _DRM_LOCKING_CONTEXT(old));
+	return 0;
+}
+
+/* This takes a lock forcibly and hands it to context.	Should ONLY be used
+   inside *_unlock to give lock to kernel before calling *_dma_schedule. */
+int drm_lock_transfer(drm_device_t *dev,
+		      __volatile__ unsigned int *lock, unsigned int context)
+{
+	unsigned int old;
+	unsigned int new;
+	char	     failed;
+
+	dev->lock.pid = 0;
+	do {
+		old = *lock;
+		new = context | _DRM_LOCK_HELD;
+		_DRM_CAS(lock, old, new, failed);
+	} while (failed);
+	DRM_DEBUG("%d => %d\n", _DRM_LOCKING_CONTEXT(old), context);
+	return 1;
+}
+
+int drm_lock_free(drm_device_t *dev,
+		  __volatile__ unsigned int *lock, unsigned int context)
+{
+	unsigned int old;
+	unsigned int new;
+	char	     failed;
+	pid_t        pid = dev->lock.pid;
+
+	DRM_DEBUG("%d\n", context);
+	dev->lock.pid = 0;
+	do {
+		old = *lock;
+		new = 0;
+		_DRM_CAS(lock, old, new, failed);
+	} while (failed);
+	if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) {
+		DRM_ERROR("%d freed heavyweight lock held by %d (pid %d)\n",
+			  context,
+			  _DRM_LOCKING_CONTEXT(old),
+			  pid);
+		return 1;
+	}
+	wake_up_interruptible(&dev->lock.lock_queue);
+	return 0;
+}
+
+static int drm_flush_queue(drm_device_t *dev, int context)
+{
+	DECLARE_WAITQUEUE(entry, current);
+	int		  ret	= 0;
+	drm_queue_t	  *q	= dev->queuelist[context];
+	
+	DRM_DEBUG("\n");
+	
+	atomic_inc(&q->use_count);
+	if (atomic_read(&q->use_count) > 1) {
+		atomic_inc(&q->block_write);
+		current->state = TASK_INTERRUPTIBLE;
+		add_wait_queue(&q->flush_queue, &entry);
+		atomic_inc(&q->block_count);
+		for (;;) {
+			if (!DRM_BUFCOUNT(&q->waitlist)) break;
+			schedule();
+			if (signal_pending(current)) {
+				ret = -EINTR; /* Can't restart */
+				break;
+			}
+		}
+		atomic_dec(&q->block_count);
+		current->state = TASK_RUNNING;
+		remove_wait_queue(&q->flush_queue, &entry);
+	}
+	atomic_dec(&q->use_count);
+	atomic_inc(&q->total_flushed);
+		
+				/* NOTE: block_write is still incremented!
+				   Use drm_flush_unlock_queue to decrement. */
+	return ret;
+}
+
+static int drm_flush_unblock_queue(drm_device_t *dev, int context)
+{
+	drm_queue_t	  *q	= dev->queuelist[context];
+	
+	DRM_DEBUG("\n");
+	
+	atomic_inc(&q->use_count);
+	if (atomic_read(&q->use_count) > 1) {
+		if (atomic_read(&q->block_write)) {
+			atomic_dec(&q->block_write);
+			wake_up_interruptible(&q->write_queue);
+		}
+	}
+	atomic_dec(&q->use_count);
+	return 0;
+}
+
+int drm_flush_block_and_flush(drm_device_t *dev, int context,
+			      drm_lock_flags_t flags)
+{
+	int ret = 0;
+	int i;
+	
+	DRM_DEBUG("\n");
+	
+	if (flags & _DRM_LOCK_FLUSH) {
+		ret = drm_flush_queue(dev, DRM_KERNEL_CONTEXT);
+		if (!ret) ret = drm_flush_queue(dev, context);
+	}
+	if (flags & _DRM_LOCK_FLUSH_ALL) {
+		for (i = 0; !ret && i < dev->queue_count; i++) {
+			ret = drm_flush_queue(dev, i);
+		}
+	}
+	return ret;
+}
+
+int drm_flush_unblock(drm_device_t *dev, int context, drm_lock_flags_t flags)
+{
+	int ret = 0;
+	int i;
+	
+	DRM_DEBUG("\n");
+	
+	if (flags & _DRM_LOCK_FLUSH) {
+		ret = drm_flush_unblock_queue(dev, DRM_KERNEL_CONTEXT);
+		if (!ret) ret = drm_flush_unblock_queue(dev, context);
+	}
+	if (flags & _DRM_LOCK_FLUSH_ALL) {
+		for (i = 0; !ret && i < dev->queue_count; i++) {
+			ret = drm_flush_unblock_queue(dev, i);
+		}
+	}
+		
+	return ret;
+}
+
+int drm_finish(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_file_t	  *priv	  = filp->private_data;
+	drm_device_t	  *dev	  = priv->dev;
+	int		  ret	  = 0;
+	drm_lock_t	  lock;
+
+	DRM_DEBUG("\n");
+
+	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	ret = drm_flush_block_and_flush(dev, lock.context, lock.flags);
+	drm_flush_unblock(dev, lock.context, lock.flags);
+	return ret;
+}
diff --git a/linux/memory.c b/linux/memory.c
new file mode 100644
index 00000000..b3fc4fca
--- /dev/null
+++ b/linux/memory.c
@@ -0,0 +1,320 @@
+/* memory.c -- Memory management wrappers for DRM -*- linux-c -*-
+ * Created: Thu Feb  4 14:00:34 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 13:04:33 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/memory.c,v 1.4 1999/08/20 20:00:53 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/memory.c,v 1.1 1999/09/25 14:38:02 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+typedef struct drm_mem_stats {
+	const char	  *name;
+	int		  succeed_count;
+	int		  free_count;
+	int		  fail_count;
+	unsigned long	  bytes_allocated;
+	unsigned long	  bytes_freed;
+} drm_mem_stats_t;
+
+static spinlock_t	  drm_mem_lock	    = SPIN_LOCK_UNLOCKED;
+static unsigned long	  drm_ram_available = 0;
+static unsigned long	  drm_ram_used	    = 0;
+static drm_mem_stats_t	  drm_mem_stats[]   = {
+	[DRM_MEM_DMA]	   = { "dmabufs"  },
+	[DRM_MEM_SAREA]	   = { "sareas"	  },
+	[DRM_MEM_DRIVER]   = { "driver"	  },
+	[DRM_MEM_MAGIC]	   = { "magic"	  },
+	[DRM_MEM_IOCTLS]   = { "ioctltab" },
+	[DRM_MEM_MAPS]	   = { "maplist"  },
+	[DRM_MEM_VMAS]	   = { "vmalist"  },
+	[DRM_MEM_BUFS]	   = { "buflist"  },
+	[DRM_MEM_SEGS]	   = { "seglist"  },
+	[DRM_MEM_PAGES]	   = { "pagelist" },
+	[DRM_MEM_FILES]	   = { "files"	  },
+	[DRM_MEM_QUEUES]   = { "queues"	  },
+	[DRM_MEM_CMDS]	   = { "commands" },
+	[DRM_MEM_MAPPINGS] = { "mappings" },
+	[DRM_MEM_BUFLISTS] = { "buflists" },
+	{ NULL, 0, }		/* Last entry must be null */
+};
+
+void drm_mem_init(void)
+{
+	drm_mem_stats_t *mem;
+	struct sysinfo	si;
+	
+	for (mem = drm_mem_stats; mem->name; ++mem) {
+		mem->succeed_count   = 0;
+		mem->free_count	     = 0;
+		mem->fail_count	     = 0;
+		mem->bytes_allocated = 0;
+		mem->bytes_freed     = 0;
+	}
+	
+	si_meminfo(&si);
+	drm_ram_available = si.totalram;
+	drm_ram_used	  = 0;
+}
+
+/* drm_mem_info is called whenever a process reads /dev/drm/mem. */
+
+static int _drm_mem_info(char *buf, char **start, off_t offset, int len,
+			 int *eof, void *data)
+{
+	drm_mem_stats_t *pt;
+
+	if (offset > 0) return 0; /* no partial requests */
+	len  = 0;
+	*eof = 1;
+	DRM_PROC_PRINT("		  total counts			"
+		       " |    outstanding  \n");
+	DRM_PROC_PRINT("type	   alloc freed fail	bytes	   freed"
+		       " | allocs      bytes\n\n");
+	DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu	    |\n",
+		       "system", 0, 0, 0, drm_ram_available);
+	DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu	    |\n",
+		       "locked", 0, 0, 0, drm_ram_used);
+	DRM_PROC_PRINT("\n");
+	for (pt = drm_mem_stats; pt->name; pt++) {
+		DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu %10lu | %6d %10ld\n",
+			       pt->name,
+			       pt->succeed_count,
+			       pt->free_count,
+			       pt->fail_count,
+			       pt->bytes_allocated,
+			       pt->bytes_freed,
+			       pt->succeed_count - pt->free_count,
+			       (long)pt->bytes_allocated
+			       - (long)pt->bytes_freed);
+	}
+	
+	return len;
+}
+
+int drm_mem_info(char *buf, char **start, off_t offset, int len,
+		 int *eof, void *data)
+{
+	int ret;
+	
+	spin_lock(&drm_mem_lock);
+	ret = _drm_mem_info(buf, start, offset, len, eof, data);
+	spin_unlock(&drm_mem_lock);
+	return ret;
+}
+
+void *drm_alloc(size_t size, int area)
+{
+	void *pt;
+	
+	if (!size) {
+		DRM_MEM_ERROR(area, "Allocating 0 bytes\n");
+		return NULL;
+	}
+	
+	if (!(pt = kmalloc(size, GFP_KERNEL))) {
+		spin_lock(&drm_mem_lock);
+		++drm_mem_stats[area].fail_count;
+		spin_unlock(&drm_mem_lock);
+		return NULL;
+	}
+	spin_lock(&drm_mem_lock);
+	++drm_mem_stats[area].succeed_count;
+	drm_mem_stats[area].bytes_allocated += size;
+	spin_unlock(&drm_mem_lock);
+	return pt;
+}
+
+void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
+{
+	void *pt;
+	
+	if (!(pt = drm_alloc(size, area))) return NULL;
+	if (oldpt && oldsize) {
+		memcpy(pt, oldpt, oldsize);
+		drm_free(oldpt, oldsize, area);
+	}
+	return pt;
+}
+
+char *drm_strdup(const char *s, int area)
+{
+	char *pt;
+	int	 length = s ? strlen(s) : 0;
+	
+	if (!(pt = drm_alloc(length+1, area))) return NULL;
+	strcpy(pt, s);
+	return pt;
+}
+
+void drm_strfree(const char *s, int area)
+{
+	unsigned int size;
+	
+	if (!s) return;
+	
+	size = 1 + (s ? strlen(s) : 0);
+	drm_free((void *)s, size, area);
+}
+
+void drm_free(void *pt, size_t size, int area)
+{
+	int alloc_count;
+	int free_count;
+	
+	if (!pt) DRM_MEM_ERROR(area, "Attempt to free NULL pointer\n");
+	else	 kfree_s(pt, size);
+	spin_lock(&drm_mem_lock);
+	drm_mem_stats[area].bytes_freed += size;
+	free_count  = ++drm_mem_stats[area].free_count;
+	alloc_count =	drm_mem_stats[area].succeed_count;
+	spin_unlock(&drm_mem_lock);
+	if (free_count > alloc_count) {
+		DRM_MEM_ERROR(area, "Excess frees: %d frees, %d allocs\n",
+			      free_count, alloc_count);
+	}
+}
+
+unsigned long drm_alloc_pages(int order, int area)
+{
+	unsigned long address;
+	unsigned long bytes	  = PAGE_SIZE << order;
+	unsigned long addr;
+	unsigned int  sz;
+	
+	spin_lock(&drm_mem_lock);
+	if (drm_ram_used > +(DRM_RAM_PERCENT * drm_ram_available) / 100) {
+		spin_unlock(&drm_mem_lock);
+		return 0;
+	}
+	spin_unlock(&drm_mem_lock);
+	
+	address = __get_free_pages(GFP_KERNEL, order);
+	if (!address) {
+		spin_lock(&drm_mem_lock);
+		++drm_mem_stats[area].fail_count;
+		spin_unlock(&drm_mem_lock);
+		return 0;
+	}
+	spin_lock(&drm_mem_lock);
+	++drm_mem_stats[area].succeed_count;
+	drm_mem_stats[area].bytes_allocated += bytes;
+	drm_ram_used		            += bytes;
+	spin_unlock(&drm_mem_lock);
+	
+	
+				/* Zero outside the lock */
+	memset((void *)address, 0, bytes);
+	
+				/* Reserve */
+	for (addr = address, sz = bytes;
+	     sz > 0;
+	     addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+		mem_map_reserve(MAP_NR(addr));
+	}
+	
+	return address;
+}
+
+void drm_free_pages(unsigned long address, int order, int area)
+{
+	unsigned long bytes = PAGE_SIZE << order;
+	int		  alloc_count;
+	int		  free_count;
+	unsigned long addr;
+	unsigned int  sz;
+	
+	if (!address) {
+		DRM_MEM_ERROR(area, "Attempt to free address 0\n");
+	} else {
+				/* Unreserve */
+		for (addr = address, sz = bytes;
+		     sz > 0;
+		     addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+			mem_map_unreserve(MAP_NR(addr));
+		}
+		free_pages(address, order);
+	}
+	
+	spin_lock(&drm_mem_lock);
+	free_count  = ++drm_mem_stats[area].free_count;
+	alloc_count =	drm_mem_stats[area].succeed_count;
+	drm_mem_stats[area].bytes_freed += bytes;
+	drm_ram_used			-= bytes;
+	spin_unlock(&drm_mem_lock);
+	if (free_count > alloc_count) {
+		DRM_MEM_ERROR(area,
+			      "Excess frees: %d frees, %d allocs\n",
+			      free_count, alloc_count);
+	}
+}
+
+void *drm_ioremap(unsigned long offset, unsigned long size)
+{
+	void *pt;
+	
+	if (!size) {
+		DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
+			      "Mapping 0 bytes at 0x%08lx\n", offset);
+		return NULL;
+	}
+	
+	if (!(pt = ioremap(offset, size))) {
+		spin_lock(&drm_mem_lock);
+		++drm_mem_stats[DRM_MEM_MAPPINGS].fail_count;
+		spin_unlock(&drm_mem_lock);
+		return NULL;
+	}
+	spin_lock(&drm_mem_lock);
+	++drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
+	drm_mem_stats[DRM_MEM_MAPPINGS].bytes_allocated += size;
+	spin_unlock(&drm_mem_lock);
+	return pt;
+}
+
+void drm_ioremapfree(void *pt, unsigned long size)
+{
+	int alloc_count;
+	int free_count;
+	
+	if (!pt)
+		DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
+			      "Attempt to free NULL pointer\n");
+	else
+		iounmap(pt);
+	
+	spin_lock(&drm_mem_lock);
+	drm_mem_stats[DRM_MEM_MAPPINGS].bytes_freed += size;
+	free_count  = ++drm_mem_stats[DRM_MEM_MAPPINGS].free_count;
+	alloc_count =	drm_mem_stats[DRM_MEM_MAPPINGS].succeed_count;
+	spin_unlock(&drm_mem_lock);
+	if (free_count > alloc_count) {
+		DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
+			      "Excess frees: %d frees, %d allocs\n",
+			      free_count, alloc_count);
+	}
+}
diff --git a/linux/proc.c b/linux/proc.c
new file mode 100644
index 00000000..0883d718
--- /dev/null
+++ b/linux/proc.c
@@ -0,0 +1,568 @@
+/* proc.c -- /proc support for DRM -*- linux-c -*-
+ * Created: Mon Jan 11 09:48:47 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 11:31:48 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/proc.c,v 1.4 1999/08/20 15:36:46 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/proc.c,v 1.1 1999/09/25 14:38:02 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+static struct proc_dir_entry *drm_root	   = NULL;
+static struct proc_dir_entry *drm_dev_root = NULL;
+static char		     drm_slot_name[64];
+
+static int	   drm_name_info(char *buf, char **start, off_t offset,
+				 int len, int *eof, void *data);
+static int	   drm_vm_info(char *buf, char **start, off_t offset,
+			       int len, int *eof, void *data);
+static int	   drm_clients_info(char *buf, char **start, off_t offset,
+				    int len, int *eof, void *data);
+static int	   drm_queues_info(char *buf, char **start, off_t offset,
+				   int len, int *eof, void *data);
+static int	   drm_bufs_info(char *buf, char **start, off_t offset,
+				 int len, int *eof, void *data);
+#if DRM_DEBUG_CODE
+static int	   drm_vma_info(char *buf, char **start, off_t offset,
+				int len, int *eof, void *data);
+#endif
+#if DRM_DMA_HISTOGRAM
+static int	   drm_histo_info(char *buf, char **start, off_t offset,
+				  int len, int *eof, void *data);
+#endif
+
+struct drm_proc_list {
+	const char *name;
+	int	   (*f)(char *, char **, off_t, int, int *, void *);
+} drm_proc_list[] = {
+	{ "name",    drm_name_info    },
+	{ "mem",     drm_mem_info     },
+	{ "vm",	     drm_vm_info      },
+	{ "clients", drm_clients_info },
+	{ "queues",  drm_queues_info  },
+	{ "bufs",    drm_bufs_info    },
+#if DRM_DEBUG_CODE
+	{ "vma",     drm_vma_info     },
+#endif
+#if DRM_DMA_HISTOGRAM
+	{ "histo",   drm_histo_info   },
+#endif
+};
+#define DRM_PROC_ENTRIES (sizeof(drm_proc_list)/sizeof(drm_proc_list[0]))
+
+int drm_proc_init(drm_device_t *dev)
+{
+	struct proc_dir_entry *ent;
+	int		      i, j;
+
+	drm_root = create_proc_entry("graphics", S_IFDIR, NULL);
+	if (!drm_root) {
+		DRM_ERROR("Cannot create /proc/graphics\n");
+		return -1;
+	}
+
+				/* Instead of doing this search, we should
+				   add some global support for /proc/graphics. */
+	for (i = 0; i < 8; i++) {
+		sprintf(drm_slot_name, "graphics/%d", i);
+		drm_dev_root = create_proc_entry(drm_slot_name, S_IFDIR, NULL);
+		if (!drm_dev_root) {
+			DRM_ERROR("Cannot create /proc/%s\n", drm_slot_name);
+			remove_proc_entry("graphics", NULL);
+		}
+		if (drm_dev_root->nlink == 2) break;
+		drm_dev_root = NULL;
+	}
+	if (!drm_dev_root) {
+		DRM_ERROR("Cannot find slot in /proc/graphics\n");
+		return -1;
+	}
+
+	for (i = 0; i < DRM_PROC_ENTRIES; i++) {
+		ent = create_proc_entry(drm_proc_list[i].name,
+					S_IFREG|S_IRUGO, drm_dev_root);
+		if (!ent) {
+			DRM_ERROR("Cannot create /proc/%s/%s\n",
+				  drm_slot_name, drm_proc_list[i].name);
+			for (j = 0; j < i; j++)
+				remove_proc_entry(drm_proc_list[i].name,
+						  drm_dev_root);
+			remove_proc_entry(drm_slot_name, NULL);
+			remove_proc_entry("graphics", NULL);
+			return -1;
+		}
+		ent->read_proc = drm_proc_list[i].f;
+		ent->data      = dev;
+	}
+
+	return 0;
+}
+
+
+int drm_proc_cleanup(void)
+{
+	int i;
+	
+	if (drm_root) {
+		if (drm_dev_root) {
+			for (i = 0; i < DRM_PROC_ENTRIES; i++) {
+				remove_proc_entry(drm_proc_list[i].name,
+						  drm_dev_root);
+			}
+			remove_proc_entry(drm_slot_name, NULL);
+		}
+		remove_proc_entry("graphics", NULL);
+		remove_proc_entry(DRM_NAME, NULL);
+	}
+	drm_root = drm_dev_root = NULL;
+	return 0;
+}
+
+static int drm_name_info(char *buf, char **start, off_t offset, int len,
+			 int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+
+	if (offset > 0) return 0; /* no partial requests */
+	len  = 0;
+	*eof = 1;
+
+	if (dev->unique) {
+		DRM_PROC_PRINT("%s 0x%x %s\n",
+			       dev->name, dev->device, dev->unique);
+	} else {
+		DRM_PROC_PRINT("%s 0x%x\n", dev->name, dev->device);
+	}
+	return len;
+}
+
+static int _drm_vm_info(char *buf, char **start, off_t offset, int len,
+			int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	drm_map_t    *map;
+	const char   *types[] = { "FB", "REG", "SHM" };
+	const char   *type;
+	int	     i;
+
+	if (offset > 0) return 0; /* no partial requests */
+	len  = 0;
+	*eof = 1;
+	DRM_PROC_PRINT("slot	 offset	      size type flags	 "
+		       "address mtrr\n\n");
+	for (i = 0; i < dev->map_count; i++) {
+		map = dev->maplist[i];
+		if (map->type < 0 || map->type > 2) type = "??";
+		else				    type = types[map->type];
+		DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
+			       i,
+			       map->offset,
+			       map->size,
+			       type,
+			       map->flags,
+			       (unsigned long)map->handle);
+		if (map->mtrr < 0) {
+			DRM_PROC_PRINT("none\n");
+		} else {
+			DRM_PROC_PRINT("%4d\n", map->mtrr);
+		}
+	}
+
+	return len;
+}
+
+static int drm_vm_info(char *buf, char **start, off_t offset, int len,
+		       int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	int	     ret;
+
+	down(&dev->struct_sem);
+	ret = _drm_vm_info(buf, start, offset, len, eof, data);
+	up(&dev->struct_sem);
+	return ret;
+}
+
+
+static int _drm_queues_info(char *buf, char **start, off_t offset, int len,
+			    int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	int	     i;
+	drm_queue_t  *q;
+
+	if (offset > 0) return 0; /* no partial requests */
+	len  = 0;
+	*eof = 1;
+	DRM_PROC_PRINT("  ctx/flags   use   fin"
+		       "   blk/rw/rwf  wait    flushed	   queued"
+		       "      locks\n\n");
+	for (i = 0; i < dev->queue_count; i++) {
+		q = dev->queuelist[i];
+		atomic_inc(&q->use_count);
+		DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
+				   "%5d/0x%03x %5d %5d"
+				   " %5d/%c%c/%c%c%c %5d %10d %10d %10d\n",
+				   i,
+				   q->flags,
+				   atomic_read(&q->use_count),
+				   atomic_read(&q->finalization),
+				   atomic_read(&q->block_count),
+				   atomic_read(&q->block_read) ? 'r' : '-',
+				   atomic_read(&q->block_write) ? 'w' : '-',
+				   waitqueue_active(&q->read_queue) ? 'r':'-',
+				   waitqueue_active(&q->write_queue) ? 'w':'-',
+				   waitqueue_active(&q->flush_queue) ? 'f':'-',
+				   DRM_BUFCOUNT(&q->waitlist),
+				   atomic_read(&q->total_flushed),
+				   atomic_read(&q->total_queued),
+				   atomic_read(&q->total_locks));
+		atomic_dec(&q->use_count);
+	}
+	
+	return len;
+}
+
+static int drm_queues_info(char *buf, char **start, off_t offset, int len,
+			   int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	int	     ret;
+
+	down(&dev->struct_sem);
+	ret = _drm_queues_info(buf, start, offset, len, eof, data);
+	up(&dev->struct_sem);
+	return ret;
+}
+
+/* drm_bufs_info is called whenever a process reads
+   /dev/drm/<dev>/bufs. */
+
+static int _drm_bufs_info(char *buf, char **start, off_t offset, int len,
+			  int *eof, void *data)
+{
+	drm_device_t	 *dev = (drm_device_t *)data;
+	drm_device_dma_t *dma = dev->dma;
+	int		 i;
+
+	if (!dma)	return 0;
+	if (offset > 0) return 0; /* no partial requests */
+	len  = 0;
+	*eof = 1;
+	DRM_PROC_PRINT(" o     size count  free	 segs pages    kB\n\n");
+	for (i = 0; i <= DRM_MAX_ORDER; i++) {
+		if (dma->bufs[i].buf_count)
+			DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
+				       i,
+				       dma->bufs[i].buf_size,
+				       dma->bufs[i].buf_count,
+				       atomic_read(&dma->bufs[i]
+						   .freelist.count),
+				       dma->bufs[i].seg_count,
+				       dma->bufs[i].seg_count
+				       *(1 << dma->bufs[i].page_order),
+				       (dma->bufs[i].seg_count
+					* (1 << dma->bufs[i].page_order))
+				       * PAGE_SIZE / 1024);
+	}
+	DRM_PROC_PRINT("\n");
+	for (i = 0; i < dma->buf_count; i++) {
+		if (i && !(i%32)) DRM_PROC_PRINT("\n");
+		DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
+	}
+	DRM_PROC_PRINT("\n");
+
+	return len;
+}
+
+static int drm_bufs_info(char *buf, char **start, off_t offset, int len,
+			 int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	int	     ret;
+
+	down(&dev->struct_sem);
+	ret = _drm_bufs_info(buf, start, offset, len, eof, data);
+	up(&dev->struct_sem);
+	return ret;
+}
+
+
+static int _drm_clients_info(char *buf, char **start, off_t offset, int len,
+			     int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	drm_file_t   *priv;
+
+	if (offset > 0) return 0; /* no partial requests */
+	len  = 0;
+	*eof = 1;
+	DRM_PROC_PRINT("a dev	pid    uid	magic	  ioctls\n\n");
+	for (priv = dev->file_first; priv; priv = priv->next) {
+		DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
+			       priv->authenticated ? 'y' : 'n',
+			       priv->minor,
+			       priv->pid,
+			       priv->uid,
+			       priv->magic,
+			       priv->ioctl_count);
+	}
+
+	return len;
+}
+
+static int drm_clients_info(char *buf, char **start, off_t offset, int len,
+			    int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	int	     ret;
+
+	down(&dev->struct_sem);
+	ret = _drm_clients_info(buf, start, offset, len, eof, data);
+	up(&dev->struct_sem);
+	return ret;
+}
+
+#if DRM_DEBUG_CODE
+
+static int _drm_vma_info(char *buf, char **start, off_t offset, int len,
+			 int *eof, void *data)
+{
+	drm_device_t	      *dev = (drm_device_t *)data;
+	drm_vma_entry_t	      *pt;
+	pgd_t		      *pgd;
+	pmd_t		      *pmd;
+	pte_t		      *pte;
+	unsigned long	      i;
+	struct vm_area_struct *vma;
+	unsigned long	      address;
+#if defined(__i386__)
+	unsigned int	      pgprot;
+#endif
+
+	if (offset > 0) return 0; /* no partial requests */
+	len  = 0;
+	*eof = 1;
+	DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
+		       atomic_read(&dev->vma_count),
+		       high_memory, virt_to_phys(high_memory));
+	for (pt = dev->vmalist; pt; pt = pt->next) {
+		if (!(vma = pt->vma)) continue;
+		DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx",
+			       pt->pid,
+			       vma->vm_start,
+			       vma->vm_end,
+			       vma->vm_flags & VM_READ	   ? 'r' : '-',
+			       vma->vm_flags & VM_WRITE	   ? 'w' : '-',
+			       vma->vm_flags & VM_EXEC	   ? 'x' : '-',
+			       vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
+			       vma->vm_flags & VM_LOCKED   ? 'l' : '-',
+			       vma->vm_flags & VM_IO	   ? 'i' : '-',
+			       vma->vm_offset );
+#if defined(__i386__)
+		pgprot = pgprot_val(vma->vm_page_prot);
+		DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
+			       pgprot & _PAGE_PRESENT  ? 'p' : '-',
+			       pgprot & _PAGE_RW       ? 'w' : 'r',
+			       pgprot & _PAGE_USER     ? 'u' : 's',
+			       pgprot & _PAGE_PWT      ? 't' : 'b',
+			       pgprot & _PAGE_PCD      ? 'u' : 'c',
+			       pgprot & _PAGE_ACCESSED ? 'a' : '-',
+			       pgprot & _PAGE_DIRTY    ? 'd' : '-',
+			       pgprot & _PAGE_4M       ? 'm' : 'k',
+			       pgprot & _PAGE_GLOBAL   ? 'g' : 'l' );
+#endif		
+		DRM_PROC_PRINT("\n");
+		for (i = vma->vm_start; i < vma->vm_end; i += PAGE_SIZE) {
+			pgd = pgd_offset(vma->vm_mm, i);
+			pmd = pmd_offset(pgd, i);
+			pte = pte_offset(pmd, i);
+			if (pte_present(*pte)) {
+				address = __pa(pte_page(*pte))
+					+ (i & (PAGE_SIZE-1));
+				DRM_PROC_PRINT("      0x%08lx -> 0x%08lx"
+					       " %c%c%c%c%c\n",
+					       i,
+					       address,
+					       pte_read(*pte)  ? 'r' : '-',
+					       pte_write(*pte) ? 'w' : '-',
+					       pte_exec(*pte)  ? 'x' : '-',
+					       pte_dirty(*pte) ? 'd' : '-',
+					       pte_young(*pte) ? 'a' : '-' );
+			} else {
+				DRM_PROC_PRINT("      0x%08lx\n", i);
+			}
+		}
+	}
+	
+	return len;
+}
+
+static int drm_vma_info(char *buf, char **start, off_t offset, int len,
+			int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	int	     ret;
+
+	down(&dev->struct_sem);
+	ret = _drm_vma_info(buf, start, offset, len, eof, data);
+	up(&dev->struct_sem);
+	return ret;
+}
+#endif
+
+
+#if DRM_DMA_HISTOGRAM
+static int _drm_histo_info(char *buf, char **start, off_t offset, int len,
+			   int *eof, void *data)
+{
+	drm_device_t	 *dev = (drm_device_t *)data;
+	drm_device_dma_t *dma = dev->dma;
+	int		 i;
+	unsigned long	 slot_value = DRM_DMA_HISTOGRAM_INITIAL;
+	unsigned long	 prev_value = 0;
+	drm_buf_t	 *buffer;
+
+	if (offset > 0) return 0; /* no partial requests */
+	len  = 0;
+	*eof = 1;
+
+	DRM_PROC_PRINT("general statistics:\n");
+	DRM_PROC_PRINT("total	 %10u\n", atomic_read(&dev->histo.total));
+	DRM_PROC_PRINT("open	 %10u\n", atomic_read(&dev->total_open));
+	DRM_PROC_PRINT("close	 %10u\n", atomic_read(&dev->total_close));
+	DRM_PROC_PRINT("ioctl	 %10u\n", atomic_read(&dev->total_ioctl));
+	DRM_PROC_PRINT("irq	 %10u\n", atomic_read(&dev->total_irq));
+	DRM_PROC_PRINT("ctx	 %10u\n", atomic_read(&dev->total_ctx));
+	
+	DRM_PROC_PRINT("\nlock statistics:\n");
+	DRM_PROC_PRINT("locks	 %10u\n", atomic_read(&dev->total_locks));
+	DRM_PROC_PRINT("unlocks	 %10u\n", atomic_read(&dev->total_unlocks));
+	DRM_PROC_PRINT("contends %10u\n", atomic_read(&dev->total_contends));
+	DRM_PROC_PRINT("sleeps	 %10u\n", atomic_read(&dev->total_sleeps));
+
+
+	if (dma) {
+		DRM_PROC_PRINT("\ndma statistics:\n");
+		DRM_PROC_PRINT("prio	 %10u\n",
+			       atomic_read(&dma->total_prio));
+		DRM_PROC_PRINT("bytes	 %10u\n",
+			       atomic_read(&dma->total_bytes));
+		DRM_PROC_PRINT("dmas	 %10u\n",
+			       atomic_read(&dma->total_dmas));
+		DRM_PROC_PRINT("missed:\n");
+		DRM_PROC_PRINT("  dma	 %10u\n",
+			       atomic_read(&dma->total_missed_dma));
+		DRM_PROC_PRINT("  lock	 %10u\n",
+			       atomic_read(&dma->total_missed_lock));
+		DRM_PROC_PRINT("  free	 %10u\n",
+			       atomic_read(&dma->total_missed_free));
+		DRM_PROC_PRINT("  sched	 %10u\n",
+			       atomic_read(&dma->total_missed_sched));
+		DRM_PROC_PRINT("tried	 %10u\n",
+			       atomic_read(&dma->total_tried));
+		DRM_PROC_PRINT("hit	 %10u\n",
+			       atomic_read(&dma->total_hit));
+		DRM_PROC_PRINT("lost	 %10u\n",
+			       atomic_read(&dma->total_lost));
+		
+		buffer = dma->next_buffer;
+		if (buffer) {
+			DRM_PROC_PRINT("next_buffer %7d\n", buffer->idx);
+		} else {
+			DRM_PROC_PRINT("next_buffer    none\n");
+		}
+		buffer = dma->this_buffer;
+		if (buffer) {
+			DRM_PROC_PRINT("this_buffer %7d\n", buffer->idx);
+		} else {
+			DRM_PROC_PRINT("this_buffer    none\n");
+		}
+	}
+	
+
+	DRM_PROC_PRINT("\nvalues:\n");
+	if (dev->lock.hw_lock) {
+		DRM_PROC_PRINT("lock	       0x%08x\n",
+			       dev->lock.hw_lock->lock);
+	} else {
+		DRM_PROC_PRINT("lock		     none\n");
+	}
+	DRM_PROC_PRINT("context_flag   0x%08x\n", dev->context_flag);
+	DRM_PROC_PRINT("interrupt_flag 0x%08x\n", dev->interrupt_flag);
+	DRM_PROC_PRINT("dma_flag       0x%08x\n", dev->dma_flag);
+
+	DRM_PROC_PRINT("queue_count    %10d\n",	 dev->queue_count);
+	DRM_PROC_PRINT("last_context   %10d\n",	 dev->last_context);
+	DRM_PROC_PRINT("last_switch    %10lu\n", dev->last_switch);
+	DRM_PROC_PRINT("last_checked   %10d\n",	 dev->last_checked);
+		
+	
+	DRM_PROC_PRINT("\n		       q2d	  d2c	     c2f"
+		       "	q2c	   q2f	      dma	 sch"
+		       "	ctx	  lacq	     lhld\n\n");
+	for (i = 0; i < DRM_DMA_HISTOGRAM_SLOTS; i++) {
+		DRM_PROC_PRINT("%s %10lu %10u %10u %10u %10u %10u"
+			       " %10u %10u %10u %10u %10u\n",
+			       i == DRM_DMA_HISTOGRAM_SLOTS - 1 ? ">=" : "< ",
+			       i == DRM_DMA_HISTOGRAM_SLOTS - 1
+			       ? prev_value : slot_value ,
+			       
+			       atomic_read(&dev->histo
+					   .queued_to_dispatched[i]),
+			       atomic_read(&dev->histo
+					   .dispatched_to_completed[i]),
+			       atomic_read(&dev->histo
+					   .completed_to_freed[i]),
+			       
+			       atomic_read(&dev->histo
+					   .queued_to_completed[i]),
+			       atomic_read(&dev->histo
+					   .queued_to_freed[i]),
+			       atomic_read(&dev->histo.dma[i]),
+			       atomic_read(&dev->histo.schedule[i]),
+			       atomic_read(&dev->histo.ctx[i]),
+			       atomic_read(&dev->histo.lacq[i]),
+			       atomic_read(&dev->histo.lhld[i]));
+		prev_value = slot_value;
+		slot_value = DRM_DMA_HISTOGRAM_NEXT(slot_value);
+	}
+	return len;
+}
+
+static int drm_histo_info(char *buf, char **start, off_t offset, int len,
+			  int *eof, void *data)
+{
+	drm_device_t *dev = (drm_device_t *)data;
+	int	     ret;
+
+	down(&dev->struct_sem);
+	ret = _drm_histo_info(buf, start, offset, len, eof, data);
+	up(&dev->struct_sem);
+	return ret;
+}
+#endif
diff --git a/linux/tdfx_context.c b/linux/tdfx_context.c
new file mode 100644
index 00000000..0c3c541d
--- /dev/null
+++ b/linux/tdfx_context.c
@@ -0,0 +1,206 @@
+/* tdfx_context.c -- IOCTLs for tdfx contexts -*- linux-c -*-
+ * Created: Thu Oct  7 10:50:22 1999 by faith@precisioninsight.com
+ * Revised: Sat Oct  9 23:39:56 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI$
+ * $XFree86$
+ *
+ */
+
+#include <linux/sched.h>
+
+#define __NO_VERSION__
+#include "drmP.h"
+#include "tdfx_drv.h"
+
+extern drm_ctx_t tdfx_res_ctx;
+
+static int tdfx_alloc_queue(drm_device_t *dev)
+{
+	static int context = 0;
+
+	return ++context;	/* Should this reuse contexts in the future? */
+}
+
+int tdfx_context_switch(drm_device_t *dev, int old, int new)
+{
+        char        buf[64];
+
+        atomic_inc(&dev->total_ctx);
+
+        if (test_and_set_bit(0, &dev->context_flag)) {
+                DRM_ERROR("Reentering -- FIXME\n");
+                return -EBUSY;
+        }
+
+#if DRM_DMA_HISTOGRAM
+        dev->ctx_start = get_cycles();
+#endif
+        
+        DRM_DEBUG("Context switch from %d to %d\n", old, new);
+
+        if (new == dev->last_context) {
+                clear_bit(0, &dev->context_flag);
+                return 0;
+        }
+        
+        if (drm_flags & DRM_FLAG_NOCTX) {
+                tdfx_context_switch_complete(dev, new);
+        } else {
+                sprintf(buf, "C %d %d\n", old, new);
+                drm_write_string(dev, buf);
+        }
+        
+        return 0;
+}
+
+int tdfx_context_switch_complete(drm_device_t *dev, int new)
+{
+        dev->last_context = new;  /* PRE/POST: This is the _only_ writer. */
+        dev->last_switch  = jiffies;
+        
+        if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+                DRM_ERROR("Lock isn't held after context switch\n");
+        }
+
+				/* If a context switch is ever initiated
+                                   when the kernel holds the lock, release
+                                   that lock here. */
+#if DRM_DMA_HISTOGRAM
+        atomic_inc(&dev->histo.ctx[drm_histogram_slot(get_cycles()
+                                                      - dev->ctx_start)]);
+                   
+#endif
+        clear_bit(0, &dev->context_flag);
+        wake_up(&dev->context_wait);
+        
+        return 0;
+}
+
+
+int tdfx_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_ctx_res_t	res;
+	drm_ctx_t	ctx;
+	int		i;
+
+	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
+	copy_from_user_ret(&res, (drm_ctx_res_t *)arg, sizeof(res), -EFAULT);
+	if (res.count >= DRM_RESERVED_CONTEXTS) {
+		memset(&ctx, 0, sizeof(ctx));
+		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
+			ctx.handle = i;
+			copy_to_user_ret(&res.contexts[i],
+					 &i,
+					 sizeof(i),
+					 -EFAULT);
+		}
+	}
+	res.count = DRM_RESERVED_CONTEXTS;
+	copy_to_user_ret((drm_ctx_res_t *)arg, &res, sizeof(res), -EFAULT);
+	return 0;
+}
+
+
+int tdfx_addctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	if ((ctx.handle = tdfx_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
+				/* Skip kernel's context and get a new one. */
+		ctx.handle = tdfx_alloc_queue(dev);
+	}
+	DRM_DEBUG("%d\n", ctx.handle);
+	copy_to_user_ret((drm_ctx_t *)arg, &ctx, sizeof(ctx), -EFAULT);
+	return 0;
+}
+
+int tdfx_modctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	unsigned long arg)
+{
+	drm_ctx_t ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
+	if (ctx.flags==_DRM_CONTEXT_PRESERVED)
+		tdfx_res_ctx.handle=ctx.handle;
+	return 0;
+}
+
+int tdfx_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	unsigned long arg)
+{
+	drm_ctx_t ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t*)arg, sizeof(ctx), -EFAULT);
+	/* This is 0, because we don't hanlde any context flags */
+	ctx.flags = 0;
+	copy_to_user_ret((drm_ctx_t*)arg, &ctx, sizeof(ctx), -EFAULT);
+	return 0;
+}
+
+int tdfx_switchctx(struct inode *inode, struct file *filp, unsigned int cmd,
+		   unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	DRM_DEBUG("%d\n", ctx.handle);
+	return tdfx_context_switch(dev, dev->last_context, ctx.handle);
+}
+
+int tdfx_newctx(struct inode *inode, struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_ctx_t	ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	DRM_DEBUG("%d\n", ctx.handle);
+	tdfx_context_switch_complete(dev, ctx.handle);
+
+	return 0;
+}
+
+int tdfx_rmctx(struct inode *inode, struct file *filp, unsigned int cmd,
+	       unsigned long arg)
+{
+	drm_ctx_t	ctx;
+
+	copy_from_user_ret(&ctx, (drm_ctx_t *)arg, sizeof(ctx), -EFAULT);
+	DRM_DEBUG("%d\n", ctx.handle);
+				/* This is currently a noop because we
+				   don't reuse context values.  Perhaps we
+				   should? */
+	
+	return 0;
+}
diff --git a/linux/tdfx_drv.c b/linux/tdfx_drv.c
new file mode 100644
index 00000000..da1a3540
--- /dev/null
+++ b/linux/tdfx_drv.c
@@ -0,0 +1,653 @@
+/* tdfx.c -- tdfx driver -*- linux-c -*-
+ * Created: Thu Oct  7 10:38:32 1999 by faith@precisioninsight.com
+ * Revised: Tue Oct 12 08:51:35 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI$
+ * $XFree86$
+ *
+ */
+
+#define EXPORT_SYMTAB
+#include "drmP.h"
+#include "tdfx_drv.h"
+EXPORT_SYMBOL(tdfx_init);
+EXPORT_SYMBOL(tdfx_cleanup);
+
+#define TDFX_NAME	 "tdfx"
+#define TDFX_DESC	 "tdfx"
+#define TDFX_DATE	 "19991009"
+#define TDFX_MAJOR	 0
+#define TDFX_MINOR	 0
+#define TDFX_PATCHLEVEL  1
+
+static drm_device_t	      tdfx_device;
+drm_ctx_t	              tdfx_res_ctx;
+
+static struct file_operations tdfx_fops = {
+	open:	 tdfx_open,
+	flush:	 drm_flush,
+	release: tdfx_release,
+	ioctl:	 tdfx_ioctl,
+	mmap:	 drm_mmap,
+	read:	 drm_read,
+	fasync:	 drm_fasync,
+};
+
+static struct miscdevice      tdfx_misc = {
+	minor: MISC_DYNAMIC_MINOR,
+	name:  TDFX_NAME,
+	fops:  &tdfx_fops,
+};
+
+static drm_ioctl_desc_t	      tdfx_ioctls[] = {
+	[DRM_IOCTL_NR(DRM_IOCTL_VERSION)]    = { tdfx_version,	  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique,	  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)]  = { drm_getmagic,	  0, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)]  = { drm_irq_busid,	  0, 1 },
+
+	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)]	     = { drm_block,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]    = { drm_unblock,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]    = { drm_addmap,	  1, 1 },
+	
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)]    = { tdfx_addctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)]     = { tdfx_rmctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)]    = { tdfx_modctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)]    = { tdfx_getctx,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { tdfx_switchctx,  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)]    = { tdfx_newctx,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)]    = { tdfx_resctx,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)]   = { drm_adddraw,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)]    = { drm_rmdraw,	  1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_LOCK)]	     = { tdfx_lock,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)]     = { tdfx_unlock,	  1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_FINISH)]     = { drm_finish,	  1, 0 },
+};
+#define TDFX_IOCTL_COUNT DRM_ARRAY_SIZE(tdfx_ioctls)
+
+#ifdef MODULE
+int			      init_module(void);
+void			      cleanup_module(void);
+static char		      *tdfx = NULL;
+
+MODULE_AUTHOR("Precision Insight, Inc., Cedar Park, Texas.");
+MODULE_DESCRIPTION("tdfx");
+MODULE_PARM(tdfx, "s");
+
+/* init_module is called when insmod is used to load the module */
+
+int init_module(void)
+{
+	return tdfx_init();
+}
+
+/* cleanup_module is called when rmmod is used to unload the module */
+
+void cleanup_module(void)
+{
+	tdfx_cleanup();
+}
+#endif
+
+#ifndef MODULE
+/* tdfx_setup is called by the kernel to parse command-line options passed
+ * via the boot-loader (e.g., LILO).  It calls the insmod option routine,
+ * drm_parse_drm.
+ *
+ * This is not currently supported, since it requires changes to
+ * linux/init/main.c. */
+ 
+
+void __init tdfx_setup(char *str, int *ints)
+{
+	if (ints[0] != 0) {
+		DRM_ERROR("Illegal command line format, ignored\n");
+		return;
+	}
+	drm_parse_options(str);
+}
+#endif
+
+static int tdfx_setup(drm_device_t *dev)
+{
+	int i;
+	
+	atomic_set(&dev->ioctl_count, 0);
+	atomic_set(&dev->vma_count, 0);
+	dev->buf_use	  = 0;
+	atomic_set(&dev->buf_alloc, 0);
+
+	atomic_set(&dev->total_open, 0);
+	atomic_set(&dev->total_close, 0);
+	atomic_set(&dev->total_ioctl, 0);
+	atomic_set(&dev->total_irq, 0);
+	atomic_set(&dev->total_ctx, 0);
+	atomic_set(&dev->total_locks, 0);
+	atomic_set(&dev->total_unlocks, 0);
+	atomic_set(&dev->total_contends, 0);
+	atomic_set(&dev->total_sleeps, 0);
+
+	for (i = 0; i < DRM_HASH_SIZE; i++) {
+		dev->magiclist[i].head = NULL;
+		dev->magiclist[i].tail = NULL;
+	}
+	dev->maplist	    = NULL;
+	dev->map_count	    = 0;
+	dev->vmalist	    = NULL;
+	dev->lock.hw_lock   = NULL;
+	init_waitqueue_head(&dev->lock.lock_queue);
+	dev->queue_count    = 0;
+	dev->queue_reserved = 0;
+	dev->queue_slots    = 0;
+	dev->queuelist	    = NULL;
+	dev->irq	    = 0;
+	dev->context_flag   = 0;
+	dev->interrupt_flag = 0;
+	dev->dma            = 0;
+	dev->dma_flag	    = 0;
+	dev->last_context   = 0;
+	dev->last_switch    = 0;
+	dev->last_checked   = 0;
+	init_timer(&dev->timer);
+	init_waitqueue_head(&dev->context_wait);
+
+	dev->ctx_start	    = 0;
+	dev->lck_start	    = 0;
+	
+	dev->buf_rp	  = dev->buf;
+	dev->buf_wp	  = dev->buf;
+	dev->buf_end	  = dev->buf + DRM_BSZ;
+	dev->buf_async	  = NULL;
+	init_waitqueue_head(&dev->buf_readers);
+	init_waitqueue_head(&dev->buf_writers);
+
+	tdfx_res_ctx.handle=-1;
+			
+	DRM_DEBUG("\n");
+			
+	/* The kernel's context could be created here, but is now created
+	   in drm_dma_enqueue.	This is more resource-efficient for
+	   hardware that does not do DMA, but may mean that
+	   drm_select_queue fails between the time the interrupt is
+	   initialized and the time the queues are initialized. */
+			
+	return 0;
+}
+
+
+static int tdfx_takedown(drm_device_t *dev)
+{
+	int		  i;
+	drm_magic_entry_t *pt, *next;
+	drm_map_t	  *map;
+	drm_vma_entry_t	  *vma, *vma_next;
+
+	DRM_DEBUG("\n");
+
+	down(&dev->struct_sem);
+	del_timer(&dev->timer);
+	
+	if (dev->devname) {
+		drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
+		dev->devname = NULL;
+	}
+	
+	if (dev->unique) {
+		drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
+		dev->unique = NULL;
+		dev->unique_len = 0;
+	}
+				/* Clear pid list */
+	for (i = 0; i < DRM_HASH_SIZE; i++) {
+		for (pt = dev->magiclist[i].head; pt; pt = next) {
+			next = pt->next;
+			drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
+		}
+		dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
+	}
+	
+				/* Clear vma list (only built for debugging) */
+	if (dev->vmalist) {
+		for (vma = dev->vmalist; vma; vma = vma_next) {
+			vma_next = vma->next;
+			drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
+		}
+		dev->vmalist = NULL;
+	}
+	
+				/* Clear map area and mtrr information */
+	if (dev->maplist) {
+		for (i = 0; i < dev->map_count; i++) {
+			map = dev->maplist[i];
+			switch (map->type) {
+			case _DRM_REGISTERS:
+			case _DRM_FRAME_BUFFER:
+#ifdef CONFIG_MTRR
+				if (map->mtrr >= 0) {
+					int retcode;
+					retcode = mtrr_del(map->mtrr,
+							   map->offset,
+							   map->size);
+					DRM_DEBUG("mtrr_del = %d\n", retcode);
+				}
+#endif
+				drm_ioremapfree(map->handle, map->size);
+				break;
+			case _DRM_SHM:
+				drm_free_pages((unsigned long)map->handle,
+					       drm_order(map->size)
+					       - PAGE_SHIFT,
+					       DRM_MEM_SAREA);
+				break;
+			}
+			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+		}
+		drm_free(dev->maplist,
+			 dev->map_count * sizeof(*dev->maplist),
+			 DRM_MEM_MAPS);
+		dev->maplist   = NULL;
+		dev->map_count = 0;
+	}
+	
+	if (dev->lock.hw_lock) {
+		dev->lock.hw_lock    = NULL; /* SHM removed */
+		dev->lock.pid	     = 0;
+		wake_up_interruptible(&dev->lock.lock_queue);
+	}
+	up(&dev->struct_sem);
+	
+	return 0;
+}
+
+/* tdfx_init is called via init_module at module load time, or via
+ * linux/init/main.c (this is not currently supported). */
+
+int tdfx_init(void)
+{
+	int		      retcode;
+	drm_device_t	      *dev = &tdfx_device;
+
+	DRM_DEBUG("\n");
+
+	memset((void *)dev, 0, sizeof(*dev));
+	dev->count_lock	  = SPIN_LOCK_UNLOCKED;
+	sema_init(&dev->struct_sem, 1);
+	
+#ifdef MODULE
+	drm_parse_options(tdfx);
+#endif
+
+	if ((retcode = misc_register(&tdfx_misc))) {
+		DRM_ERROR("Cannot register \"%s\"\n", TDFX_NAME);
+		return retcode;
+	}
+	dev->device = MKDEV(MISC_MAJOR, tdfx_misc.minor);
+	dev->name   = TDFX_NAME;
+
+	drm_mem_init();
+	drm_proc_init(dev);
+
+	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
+		 TDFX_NAME,
+		 TDFX_MAJOR,
+		 TDFX_MINOR,
+		 TDFX_PATCHLEVEL,
+		 TDFX_DATE,
+		 tdfx_misc.minor);
+	
+	return 0;
+}
+
+/* tdfx_cleanup is called via cleanup_module at module unload time. */
+
+void tdfx_cleanup(void)
+{
+	drm_device_t	      *dev = &tdfx_device;
+
+	DRM_DEBUG("\n");
+	
+	drm_proc_cleanup();
+	if (misc_deregister(&tdfx_misc)) {
+		DRM_ERROR("Cannot unload module\n");
+	} else {
+		DRM_INFO("Module unloaded\n");
+	}
+	tdfx_takedown(dev);
+}
+
+int tdfx_version(struct inode *inode, struct file *filp, unsigned int cmd,
+		  unsigned long arg)
+{
+	drm_version_t version;
+	int	      len;
+
+	copy_from_user_ret(&version,
+			   (drm_version_t *)arg,
+			   sizeof(version),
+			   -EFAULT);
+
+#define DRM_COPY(name,value)				     \
+	len = strlen(value);				     \
+	if (len > name##_len) len = name##_len;		     \
+	name##_len = strlen(value);			     \
+	if (len && name) {				     \
+		copy_to_user_ret(name, value, len, -EFAULT); \
+	}
+
+	version.version_major	   = TDFX_MAJOR;
+	version.version_minor	   = TDFX_MINOR;
+	version.version_patchlevel = TDFX_PATCHLEVEL;
+
+	DRM_COPY(version.name, TDFX_NAME);
+	DRM_COPY(version.date, TDFX_DATE);
+	DRM_COPY(version.desc, TDFX_DESC);
+
+	copy_to_user_ret((drm_version_t *)arg,
+			 &version,
+			 sizeof(version),
+			 -EFAULT);
+	return 0;
+}
+
+int tdfx_open(struct inode *inode, struct file *filp)
+{
+	drm_device_t  *dev    = &tdfx_device;
+	int	      retcode = 0;
+	
+	DRM_DEBUG("open_count = %d\n", dev->open_count);
+	if (!(retcode = drm_open_helper(inode, filp, dev))) {
+		MOD_INC_USE_COUNT;
+		atomic_inc(&dev->total_open);
+		spin_lock(&dev->count_lock);
+		if (!dev->open_count++) {
+			spin_unlock(&dev->count_lock);
+			return tdfx_setup(dev);
+		}
+		spin_unlock(&dev->count_lock);
+	}
+	return retcode;
+}
+
+int tdfx_release(struct inode *inode, struct file *filp)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+	int	      retcode = 0;
+
+	DRM_DEBUG("open_count = %d\n", dev->open_count);
+	if (!(retcode = drm_release(inode, filp))) {
+		MOD_DEC_USE_COUNT;
+		atomic_inc(&dev->total_close);
+		spin_lock(&dev->count_lock);
+		if (!--dev->open_count) {
+			if (atomic_read(&dev->ioctl_count) || dev->blocked) {
+				DRM_ERROR("Device busy: %d %d\n",
+					  atomic_read(&dev->ioctl_count),
+					  dev->blocked);
+				spin_unlock(&dev->count_lock);
+				return -EBUSY;
+			}
+			spin_unlock(&dev->count_lock);
+			return tdfx_takedown(dev);
+		}
+		spin_unlock(&dev->count_lock);
+	}
+	return retcode;
+}
+
+/* tdfx_ioctl is called whenever a process performs an ioctl on /dev/drm. */
+
+int tdfx_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	int		 nr	 = DRM_IOCTL_NR(cmd);
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	int		 retcode = 0;
+	drm_ioctl_desc_t *ioctl;
+	drm_ioctl_t	 *func;
+
+	atomic_inc(&dev->ioctl_count);
+	atomic_inc(&dev->total_ioctl);
+	++priv->ioctl_count;
+	
+	DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
+		  current->pid, cmd, nr, dev->device, priv->authenticated);
+
+	if (nr >= TDFX_IOCTL_COUNT) {
+		retcode = -EINVAL;
+	} else {
+		ioctl	  = &tdfx_ioctls[nr];
+		func	  = ioctl->func;
+
+		if (!func) {
+			DRM_DEBUG("no function\n");
+			retcode = -EINVAL;
+		} else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN))
+			    || (ioctl->auth_needed && !priv->authenticated)) {
+			retcode = -EACCES;
+		} else {
+			retcode = (func)(inode, filp, cmd, arg);
+		}
+	}
+	
+	atomic_dec(&dev->ioctl_count);
+	return retcode;
+}
+
+int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
+	      unsigned long arg)
+{
+        drm_file_t        *priv   = filp->private_data;
+        drm_device_t      *dev    = priv->dev;
+        DECLARE_WAITQUEUE(entry, current);
+        int               ret   = 0;
+        drm_lock_t        lock;
+#if DRM_DMA_HISTOGRAM
+        cycles_t          start;
+
+        dev->lck_start = start = get_cycles();
+#endif
+
+        copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+
+        if (lock.context == DRM_KERNEL_CONTEXT) {
+                DRM_ERROR("Process %d using kernel context %d\n",
+                          current->pid, lock.context);
+                return -EINVAL;
+        }
+
+        DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
+                  lock.context, current->pid, dev->lock.hw_lock->lock,
+                  lock.flags);
+
+#if 0
+				/* dev->queue_count == 0 right now for
+                                   tdfx.  FIXME? */
+        if (lock.context < 0 || lock.context >= dev->queue_count)
+                return -EINVAL;
+#endif
+        
+        if (!ret) {
+#if 0
+                if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
+                    != lock.context) {
+                        long j = jiffies - dev->lock.lock_time;
+
+                        if (lock.context == tdfx_res_ctx.handle &&
+				j >= 0 && j < DRM_LOCK_SLICE) {
+                                /* Can't take lock if we just had it and
+                                   there is contention. */
+                                DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d jiffies=%d\n",
+					lock.context, current->pid, j, 
+					dev->lock.lock_time, jiffies);
+                                current->state = TASK_INTERRUPTIBLE;
+				current->policy |= SCHED_YIELD;
+                                schedule_timeout(DRM_LOCK_SLICE-j);
+				DRM_DEBUG("jiffies=%d\n", jiffies);
+                        }
+                }
+#endif
+                add_wait_queue(&dev->lock.lock_queue, &entry);
+                for (;;) {
+                        if (!dev->lock.hw_lock) {
+                                /* Device has been unregistered */
+                                ret = -EINTR;
+                                break;
+                        }
+                        if (drm_lock_take(&dev->lock.hw_lock->lock,
+                                          lock.context)) {
+                                dev->lock.pid       = current->pid;
+                                dev->lock.lock_time = jiffies;
+                                atomic_inc(&dev->total_locks);
+                                break;  /* Got lock */
+                        }
+                        
+                                /* Contention */
+                        atomic_inc(&dev->total_sleeps);
+                        current->state = TASK_INTERRUPTIBLE;
+#if 1
+			current->policy |= SCHED_YIELD;
+#endif
+                        schedule();
+                        if (signal_pending(current)) {
+                                ret = -ERESTARTSYS;
+                                break;
+                        }
+                }
+                current->state = TASK_RUNNING;
+                remove_wait_queue(&dev->lock.lock_queue, &entry);
+        }
+
+#if 0
+	if (!ret && dev->last_context != lock.context &&
+		lock.context != tdfx_res_ctx.handle &&
+		dev->last_context != tdfx_res_ctx.handle) {
+		add_wait_queue(&dev->context_wait, &entry);
+	        current->state = TASK_INTERRUPTIBLE;
+                /* PRE: dev->last_context != lock.context */
+	        tdfx_context_switch(dev, dev->last_context, lock.context);
+		/* POST: we will wait for the context
+                   switch and will dispatch on a later call
+                   when dev->last_context == lock.context
+                   NOTE WE HOLD THE LOCK THROUGHOUT THIS
+                   TIME! */
+		current->policy |= SCHED_YIELD;
+	        schedule();
+	        current->state = TASK_RUNNING;
+	        remove_wait_queue(&dev->context_wait, &entry);
+	        if (signal_pending(current)) {
+	                ret = -EINTR;
+	        } else if (dev->last_context != lock.context) {
+			DRM_ERROR("Context mismatch: %d %d\n",
+                        	dev->last_context, lock.context);
+	        }
+	}
+#endif
+
+        if (!ret) {
+                if (lock.flags & _DRM_LOCK_READY) {
+				/* Wait for space in DMA/FIFO */
+		}
+                if (lock.flags & _DRM_LOCK_QUIESCENT) {
+				/* Make hardware quiescent */
+#if 0
+                        tdfx_quiescent(dev);
+#endif
+		}
+        }
+
+#if 0
+	DRM_ERROR("pid = %5d, old counter = %5ld\n", 
+		current->pid, current->counter);
+#endif
+	if (lock.context != tdfx_res_ctx.handle) {
+		current->counter = 5;
+		current->priority = DEF_PRIORITY/4;
+	}
+#if 0
+	while (current->counter > 25)
+		current->counter >>= 1; /* decrease time slice */
+	DRM_ERROR("pid = %5d, new counter = %5ld\n",
+		 current->pid, current->counter);
+#endif
+        DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");
+
+#if DRM_DMA_HISTOGRAM
+        atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
+#endif
+        
+        return ret;
+}
+
+
+int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
+		 unsigned long arg)
+{
+	drm_file_t	  *priv	  = filp->private_data;
+	drm_device_t	  *dev	  = priv->dev;
+	drm_lock_t	  lock;
+
+	copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+	
+	if (lock.context == DRM_KERNEL_CONTEXT) {
+		DRM_ERROR("Process %d using kernel context %d\n",
+			  current->pid, lock.context);
+		return -EINVAL;
+	}
+
+	DRM_DEBUG("%d frees lock (%d holds)\n",
+		  lock.context,
+		  _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
+	atomic_inc(&dev->total_unlocks);
+	if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
+		atomic_inc(&dev->total_contends);
+	drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
+				/* FIXME: Try to send data to card here */
+	if (!dev->context_flag) {
+		if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
+				  DRM_KERNEL_CONTEXT)) {
+			DRM_ERROR("\n");
+		}
+	}
+
+#if 0
+	current->policy |= SCHED_YIELD;
+	current->state = TASK_INTERRUPTIBLE;
+	schedule_timeout(1000);
+#endif
+
+	if (lock.context != tdfx_res_ctx.handle) {
+		current->counter = 5;
+		current->priority = DEF_PRIORITY;
+	}
+#if 0
+	current->state = TASK_INTERRUPTIBLE;
+	schedule_timeout(10);
+#endif
+	
+	return 0;
+}
diff --git a/linux/tdfx_drv.h b/linux/tdfx_drv.h
new file mode 100644
index 00000000..bdff05ee
--- /dev/null
+++ b/linux/tdfx_drv.h
@@ -0,0 +1,68 @@
+/* tdfx_drv.h -- Private header for tdfx driver -*- linux-c -*-
+ * Created: Thu Oct  7 10:40:04 1999 by faith@precisioninsight.com
+ * Revised: Sat Oct  9 23:38:19 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All rights reserved.
+ *
+ * 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.
+ * 
+ * $PI$
+ * $XFree86$
+ * 
+ */
+
+#ifndef _TDFX_DRV_H_
+#define _TDFX_DRV_H_
+
+				/* tdfx_drv.c */
+extern int  tdfx_init(void);
+extern void tdfx_cleanup(void);
+extern int  tdfx_version(struct inode *inode, struct file *filp,
+			  unsigned int cmd, unsigned long arg);
+extern int  tdfx_open(struct inode *inode, struct file *filp);
+extern int  tdfx_release(struct inode *inode, struct file *filp);
+extern int  tdfx_ioctl(struct inode *inode, struct file *filp,
+			unsigned int cmd, unsigned long arg);
+extern int  tdfx_lock(struct inode *inode, struct file *filp,
+		       unsigned int cmd, unsigned long arg);
+extern int  tdfx_unlock(struct inode *inode, struct file *filp,
+			 unsigned int cmd, unsigned long arg);
+
+				/* tdfx_context.c */
+
+extern int  tdfx_resctx(struct inode *inode, struct file *filp,
+			unsigned int cmd, unsigned long arg);
+extern int  tdfx_addctx(struct inode *inode, struct file *filp,
+		        unsigned int cmd, unsigned long arg);
+extern int  tdfx_modctx(struct inode *inode, struct file *filp,
+		        unsigned int cmd, unsigned long arg);
+extern int  tdfx_getctx(struct inode *inode, struct file *filp,
+		        unsigned int cmd, unsigned long arg);
+extern int  tdfx_switchctx(struct inode *inode, struct file *filp,
+			   unsigned int cmd, unsigned long arg);
+extern int  tdfx_newctx(struct inode *inode, struct file *filp,
+			unsigned int cmd, unsigned long arg);
+extern int  tdfx_rmctx(struct inode *inode, struct file *filp,
+		       unsigned int cmd, unsigned long arg);
+
+extern int  tdfx_context_switch(drm_device_t *dev, int old, int new);
+extern int  tdfx_context_switch_complete(drm_device_t *dev, int new);
+#endif
diff --git a/linux/vm.c b/linux/vm.c
new file mode 100644
index 00000000..89803784
--- /dev/null
+++ b/linux/vm.c
@@ -0,0 +1,264 @@
+/* vm.c -- Memory mapping for DRM -*- linux-c -*-
+ * Created: Mon Jan  4 08:58:31 1999 by faith@precisioninsight.com
+ * Revised: Fri Aug 20 22:48:11 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/vm.c,v 1.7 1999/08/21 02:48:34 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/vm.c,v 1.1 1999/09/25 14:38:02 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+struct vm_operations_struct   drm_vm_ops = {
+	nopage:	 drm_vm_nopage,
+	open:	 drm_vm_open,
+	close:	 drm_vm_close,
+};
+
+struct vm_operations_struct   drm_vm_shm_ops = {
+	nopage:	 drm_vm_shm_nopage,
+	open:	 drm_vm_open,
+	close:	 drm_vm_close,
+};
+
+struct vm_operations_struct   drm_vm_dma_ops = {
+	nopage:	 drm_vm_dma_nopage,
+	open:	 drm_vm_open,
+	close:	 drm_vm_close,
+};
+
+unsigned long drm_vm_nopage(struct vm_area_struct *vma,
+			    unsigned long address,
+			    int write_access)
+{
+	DRM_DEBUG("0x%08lx, %d\n", address, write_access);
+
+	return 0;		/* Disallow mremap */
+}
+
+unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma,
+				unsigned long address,
+				int write_access)
+{
+	drm_file_t	 *priv	 = vma->vm_file->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	unsigned long	 physical;
+	unsigned long	 offset;
+	unsigned long	 page;
+
+	if (address > vma->vm_end) return 0; /* Disallow mremap */
+	if (!dev->lock.hw_lock)    return 0; /* Nothing allocated */
+
+	offset	 = address - vma->vm_start;
+	page	 = offset >> PAGE_SHIFT;
+	physical = (unsigned long)dev->lock.hw_lock + (offset & (~PAGE_MASK));
+	atomic_inc(&mem_map[MAP_NR(physical)].count); /* Dec. by kernel */
+
+	DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", address, page, physical);
+	return physical;
+}
+
+unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma,
+				unsigned long address,
+				int write_access)
+{
+	drm_file_t	 *priv	 = vma->vm_file->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_device_dma_t *dma	 = dev->dma;
+	unsigned long	 physical;
+	unsigned long	 offset;
+	unsigned long	 page;
+
+	if (!dma)		   return 0; /* Error */
+	if (address > vma->vm_end) return 0; /* Disallow mremap */
+	if (!dma->pagelist)	   return 0; /* Nothing allocated */
+
+	offset	 = address - vma->vm_start; /* vm_offset should be 0 */
+	page	 = offset >> PAGE_SHIFT;
+	physical = dma->pagelist[page] + (offset & (~PAGE_MASK));
+	atomic_inc(&mem_map[MAP_NR(physical)].count); /* Dec. by kernel */
+
+	DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", address, page, physical);
+	return physical;
+}
+
+void drm_vm_open(struct vm_area_struct *vma)
+{
+	drm_file_t	*priv	= vma->vm_file->private_data;
+	drm_device_t	*dev	= priv->dev;
+#if DRM_DEBUG_CODE
+	drm_vma_entry_t *vma_entry;
+#endif
+
+	DRM_DEBUG("0x%08lx,0x%08lx\n",
+		  vma->vm_start, vma->vm_end - vma->vm_start);
+	atomic_inc(&dev->vma_count);
+	MOD_INC_USE_COUNT;
+
+#if DRM_DEBUG_CODE
+	vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS);
+	if (vma_entry) {
+		down(&dev->struct_sem);
+		vma_entry->vma	= vma;
+		vma_entry->next = dev->vmalist;
+		vma_entry->pid	= current->pid;
+		dev->vmalist	= vma_entry;
+		up(&dev->struct_sem);
+	}
+#endif
+}
+
+void drm_vm_close(struct vm_area_struct *vma)
+{
+	drm_file_t	*priv	= vma->vm_file->private_data;
+	drm_device_t	*dev	= priv->dev;
+#if DRM_DEBUG_CODE
+	drm_vma_entry_t *pt, *prev;
+#endif
+
+	DRM_DEBUG("0x%08lx,0x%08lx\n",
+		  vma->vm_start, vma->vm_end - vma->vm_start);
+	MOD_DEC_USE_COUNT;
+	atomic_dec(&dev->vma_count);
+
+#if DRM_DEBUG_CODE
+	down(&dev->struct_sem);
+	for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
+		if (pt->vma == vma) {
+			if (prev) {
+				prev->next = pt->next;
+			} else {
+				dev->vmalist = pt->next;
+			}
+			drm_free(pt, sizeof(*pt), DRM_MEM_VMAS);
+			break;
+		}
+	}
+	up(&dev->struct_sem);
+#endif
+}
+
+int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
+{
+	drm_file_t	 *priv	 = filp->private_data;
+	drm_device_t	 *dev	 = priv->dev;
+	drm_device_dma_t *dma	 = dev->dma;
+	unsigned long	 length	 = vma->vm_end - vma->vm_start;
+	
+	DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
+		  vma->vm_start, vma->vm_end, vma->vm_offset);
+
+				/* Length must match exact page count */
+	if ((length >> PAGE_SHIFT) != dma->page_count) return -EINVAL;
+
+	vma->vm_ops   = &drm_vm_dma_ops;
+	vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */
+	
+#if LINUX_VERSION_CODE < 0x020203 /* KERNEL_VERSION(2,2,3) */
+				/* In Linux 2.2.3 and above, this is
+				   handled in do_mmap() in mm/mmap.c. */
+	++filp->f_count;
+#endif
+	vma->vm_file  =	 filp;	/* Needed for drm_vm_open() */
+	drm_vm_open(vma);
+	return 0;
+}
+
+int drm_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	drm_file_t	*priv	= filp->private_data;
+	drm_device_t	*dev	= priv->dev;
+	drm_map_t	*map	= NULL;
+	int		i;
+	
+	DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
+		  vma->vm_start, vma->vm_end, vma->vm_offset);
+
+	if (!vma->vm_offset) return drm_mmap_dma(filp, vma);
+
+				/* A sequential search of a linked list is
+				   fine here because: 1) there will only be
+				   about 5-10 entries in the list and, 2) a
+				   DRI client only has to do this mapping
+				   once, so it doesn't have to be optimized
+				   for performance, even if the list was a
+				   bit longer. */
+	for (i = 0; i < dev->map_count; i++) {
+		map = dev->maplist[i];
+		if (map->offset == vma->vm_offset) break;
+	}
+	
+	if (i >= dev->map_count) return -EINVAL;
+	if (!map || ((map->flags&_DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN)))
+		return -EPERM;
+
+				/* Check for valid size. */
+	if (map->size != vma->vm_end - vma->vm_start) return -EINVAL;
+	
+
+	switch (map->type) {
+	case _DRM_FRAME_BUFFER:
+	case _DRM_REGISTERS:
+		if (vma->vm_offset >= __pa(high_memory)) {
+#if defined(__i386__)
+			if (boot_cpu_data.x86 > 3) {
+				pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
+				pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
+			}
+#endif
+			vma->vm_flags |= VM_IO;	/* not in core dump */
+		}
+		if (remap_page_range(vma->vm_start,
+				     vma->vm_offset,
+				     vma->vm_end - vma->vm_start,
+				     vma->vm_page_prot))
+				return -EAGAIN;
+		vma->vm_ops = &drm_vm_ops;
+		break;
+	case _DRM_SHM:
+		vma->vm_ops = &drm_vm_shm_ops;
+				/* Don't let this area swap.  Change when
+				   DRM_KERNEL advisory is supported. */
+		vma->vm_flags |= VM_LOCKED;
+		break;
+	default:
+		return -EINVAL;	/* This should never happen. */
+	}
+	vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */
+	if (map->flags & _DRM_READ_ONLY) {
+		pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
+	}
+
+	
+#if LINUX_VERSION_CODE < 0x020203 /* KERNEL_VERSION(2,2,3) */
+				/* In Linux 2.2.3 and above, this is
+				   handled in do_mmap() in mm/mmap.c. */
+	++filp->f_count;
+#endif
+	vma->vm_file  =	 filp;	/* Needed for drm_vm_open() */
+	drm_vm_open(vma);
+	return 0;
+}