Move Mesa to xc/extras Update to the latest Mesa 3.2 code Fix the Q3Demo

    bugs (white railgun and texture mapping) Simplify driver texture
    mapping routines Fix device driver for 2.3 kernels Improve performance

9 files changed, 187 insertions, 89 deletions

diff --git a/linux/bufs.c b/linux/bufs.c
index e9879099..780c4fb6 100644
--- a/linux/bufs.c
+++ b/linux/bufs.c
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Fri Dec  3 12:11:11 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -89,10 +89,11 @@ int drm_addmap(struct inode *inode, struct file *filp, unsigned int cmd,
 			
 
 	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);
+		DRM_DEBUG("%ld %d %p\n", map->size, drm_order(map->size),
+			  map->handle);
 		if (!map->handle) {
 			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 			return -ENOMEM;
diff --git a/linux/drm.h b/linux/drm.h
index 324e2002..320db51e 100644
--- a/linux/drm.h
+++ b/linux/drm.h
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Mon Dec  6 17:11:19 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All rights reserved.
@@ -26,7 +26,10 @@
  * 
  * $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 $
- * 
+ *
+ * Acknowledgements:
+ * Dec 1999, Richard Henderson <rth@twiddle.net>, move to generic cmpxchg.
+ *
  */
 
 #ifndef _DRM_H_
diff --git a/linux/drmP.h b/linux/drmP.h
index 37b9d053..966e6e05 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Mon Dec  6 16:06:49 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All rights reserved.
@@ -83,33 +83,77 @@
 #define DRM_MEM_BUFLISTS 14
 
 				/* Backward compatibility section */
+				/* _PAGE_WT changed to _PAGE_PWT in 2.2.6 */
 #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 */
+				/* Wait queue declarations changed 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)
+				/* _PAGE_4M changed to _PAGE_PSE in 2.3.23 */
+#ifndef _PAGE_PSE
+#define _PAGE_PSE _PAGE_4M
+#endif
+
+				/* vm_offset changed to vm_pgoff in 2.3.25 */
+#if LINUX_VERSION_CODE < 0x020319
+#define VM_OFFSET(vma) ((vma)->vm_offset)
+#else
+#define VM_OFFSET(vma) ((vma)->vm_pgoff << PAGE_SHIFT)
+#endif
 
+				/* *_nopage return values defined in 2.3.26 */
+#ifndef NOPAGE_SIGBUS
+#define NOPAGE_SIGBUS 0
+#endif
+#ifndef NOPAGE_OOM
+#define NOPAGE_OOM 0
+#endif
 
+				/* Generic cmpxchg added in 2.3.x */
+#if CPU != 386
+#ifndef __HAVE_ARCH_CMPXCHG
+				/* Include this here so that driver can be
+                                   used with older kernels. */
+static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
+				      unsigned long new, int size)
+{
+	unsigned long prev;
+	switch (size) {
+	case 1:
+		__asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
+				     : "=a"(prev)
+				     : "q"(new), "m"(*__xg(ptr)), "0"(old)
+				     : "memory");
+		return prev;
+	case 2:
+		__asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
+				     : "=a"(prev)
+				     : "q"(new), "m"(*__xg(ptr)), "0"(old)
+				     : "memory");
+		return prev;
+	case 4:
+		__asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
+				     : "=a"(prev)
+				     : "q"(new), "m"(*__xg(ptr)), "0"(old)
+				     : "memory");
+		return prev;
+	}
+	return old;
+}
+
+#define cmpxchg(ptr,o,n)						\
+  ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),		\
+				 (unsigned long)(n),sizeof(*(ptr))))
+#endif
+#else
+				/* Compiling for a 386 proper... */
+#error DRI not supported on Intel 80386
+#endif
 
 				/* Macros to make printk easier */
 #define DRM_ERROR(fmt, arg...) \
@@ -436,6 +480,7 @@ extern ssize_t	     drm_read(struct file *filp, char *buf, size_t count,
 extern int	     drm_write_string(drm_device_t *dev, const char *s);
 
 				/* Mapping support (vm.c) */
+#if LINUX_VERSION_CODE < 0x020317
 extern unsigned long drm_vm_nopage(struct vm_area_struct *vma,
 				   unsigned long address,
 				   int write_access);
@@ -445,6 +490,18 @@ extern unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma,
 extern unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma,
 				       unsigned long address,
 				       int write_access);
+#else
+				/* Return type changed in 2.3.23 */
+extern struct page *drm_vm_nopage(struct vm_area_struct *vma,
+				  unsigned long address,
+				  int write_access);
+extern struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
+				      unsigned long address,
+				      int write_access);
+extern struct page *drm_vm_dma_nopage(struct vm_area_struct *vma,
+				      unsigned long address,
+				      int write_access);
+#endif
 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,
diff --git a/linux/fops.c b/linux/fops.c
index 403a19bb..47eacb83 100644
--- a/linux/fops.c
+++ b/linux/fops.c
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Fri Dec  3 10:26:26 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -75,8 +75,8 @@ 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);
+	DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n",
+		  current->pid, dev->device, dev->open_count);
 	return 0;
 }
 
@@ -211,7 +211,12 @@ int drm_write_string(drm_device_t *dev, const char *s)
 		send -= count;
 	}
 
+#if LINUX_VERSION_CODE < 0x020315
 	if (dev->buf_async) kill_fasync(dev->buf_async, SIGIO);
+#else
+				/* Parameter added in 2.3.21 */
+	if (dev->buf_async) kill_fasync(dev->buf_async, SIGIO, POLL_IN);
+#endif
 	DRM_DEBUG("waking\n");
 	wake_up_interruptible(&dev->buf_readers);
 	return 0;
diff --git a/linux/lists.c b/linux/lists.c
index 3d1263d0..b84561f2 100644
--- a/linux/lists.c
+++ b/linux/lists.c
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Mon Dec  6 16:04:44 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -130,11 +130,9 @@ int drm_freelist_destroy(drm_freelist_t *bl)
 
 int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
 {
-	unsigned int	 old;
-	unsigned int	 new;
-	char		 failed;
+	drm_buf_t        *old, *prev;
 	int		 count = 0;
-	drm_device_dma_t *dma = dev->dma;
+	drm_device_dma_t *dma  = dev->dma;
 
 	if (!dma) {
 		DRM_ERROR("No DMA support\n");
@@ -155,15 +153,14 @@ int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *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);
+		old       = bl->next;
+		bl->next  = old;
+		prev      = cmpxchg(&bl->next, old, buf);
 		if (++count > DRM_LOOPING_LIMIT) {
 			DRM_ERROR("Looping\n");
 			return 1;
 		}
-	} while (failed);
+	} while (prev != old);
 	atomic_inc(&bl->count);
 	if (atomic_read(&bl->count) > dma->buf_count) {
 		DRM_ERROR("%d of %d buffers free after addition of %d\n",
@@ -180,9 +177,7 @@ int drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
 
 static drm_buf_t *drm_freelist_try(drm_freelist_t *bl)
 {
-	unsigned int	  old;
-	unsigned int	  new;
-	char		  failed;
+	drm_buf_t         *old, *new, *prev;
 	drm_buf_t	  *buf;
 	int		  count = 0;
 
@@ -190,20 +185,18 @@ static drm_buf_t *drm_freelist_try(drm_freelist_t *bl)
 	
 				/* 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);
+		old = bl->next;
+		if (!old) return NULL;
+		new  = bl->next->next;
+		prev = cmpxchg(&bl->next, old, new);
 		if (++count > DRM_LOOPING_LIMIT) {
 			DRM_ERROR("Looping\n");
 			return NULL;
 		}
-	} while (failed);
+	} while (prev != old);
 	atomic_dec(&bl->count);
 	
-	buf	  = (drm_buf_t *)old;
+	buf	  = old;
 	buf->next = NULL;
 	buf->list = DRM_LIST_NONE;
 	DRM_DEBUG("%d, count = %d, wfh = %d, w%d, p%d\n",
diff --git a/linux/lock.c b/linux/lock.c
index ab1c0742..e8c1eff1 100644
--- a/linux/lock.c
+++ b/linux/lock.c
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Mon Dec  6 16:04:44 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -48,17 +48,15 @@ int drm_unblock(struct inode *inode, struct file *filp, unsigned int cmd,
 
 int drm_lock_take(__volatile__ unsigned int *lock, unsigned int context)
 {
-	unsigned int old;
-	unsigned int new;
-	char	     failed;
+	unsigned int old, new, prev;
 
 	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);
+		prev = cmpxchg(lock, old, new);
+	} while (prev != old);
 	if (_DRM_LOCKING_CONTEXT(old) == context) {
 		if (old & _DRM_LOCK_HELD) {
 			if (context != DRM_KERNEL_CONTEXT) {
@@ -83,16 +81,14 @@ int drm_lock_take(__volatile__ unsigned int *lock, unsigned int context)
 int drm_lock_transfer(drm_device_t *dev,
 		      __volatile__ unsigned int *lock, unsigned int context)
 {
-	unsigned int old;
-	unsigned int new;
-	char	     failed;
+	unsigned int old, new, prev;
 
 	dev->lock.pid = 0;
 	do {
-		old = *lock;
-		new = context | _DRM_LOCK_HELD;
-		_DRM_CAS(lock, old, new, failed);
-	} while (failed);
+		old  = *lock;
+		new  = context | _DRM_LOCK_HELD;
+		prev = cmpxchg(lock, old, new);
+	} while (prev != old);
 	DRM_DEBUG("%d => %d\n", _DRM_LOCKING_CONTEXT(old), context);
 	return 1;
 }
@@ -100,18 +96,16 @@ int drm_lock_transfer(drm_device_t *dev,
 int drm_lock_free(drm_device_t *dev,
 		  __volatile__ unsigned int *lock, unsigned int context)
 {
-	unsigned int old;
-	unsigned int new;
-	char	     failed;
+	unsigned int old, new, prev;
 	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);
+		old  = *lock;
+		new  = 0;
+		prev = cmpxchg(lock, old, new);
+	} while (prev != old);
 	if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) {
 		DRM_ERROR("%d freed heavyweight lock held by %d (pid %d)\n",
 			  context,
diff --git a/linux/memory.c b/linux/memory.c
index b3fc4fca..af8d510b 100644
--- a/linux/memory.c
+++ b/linux/memory.c
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Mon Dec  6 10:28:18 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -42,7 +42,7 @@ typedef struct drm_mem_stats {
 } 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_available = 0; /* In pages */
 static unsigned long	  drm_ram_used	    = 0;
 static drm_mem_stats_t	  drm_mem_stats[]   = {
 	[DRM_MEM_DMA]	   = { "dmabufs"  },
@@ -77,7 +77,12 @@ void drm_mem_init(void)
 	}
 	
 	si_meminfo(&si);
+#if LINUX_VERSION_CODE < 0x020317
+				/* Changed to page count in 2.3.23 */
+	drm_ram_available = si.totalram >> PAGE_SHIFT;
+#else
 	drm_ram_available = si.totalram;
+#endif
 	drm_ram_used	  = 0;
 }
 
@@ -95,10 +100,11 @@ static int _drm_mem_info(char *buf, char **start, off_t offset, int len,
 		       " |    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("%-9.9s %5d %5d %4d %10lu kB         |\n",
+		       "system", 0, 0, 0,
+		       drm_ram_available << (PAGE_SHIFT - 10));
+	DRM_PROC_PRINT("%-9.9s %5d %5d %4d %10lu kB         |\n",
+		       "locked", 0, 0, 0, drm_ram_used >> 10);
 	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",
@@ -207,7 +213,8 @@ unsigned long drm_alloc_pages(int order, int area)
 	unsigned int  sz;
 	
 	spin_lock(&drm_mem_lock);
-	if (drm_ram_used > +(DRM_RAM_PERCENT * drm_ram_available) / 100) {
+	if ((drm_ram_used >> PAGE_SHIFT)
+	    > (DRM_RAM_PERCENT * drm_ram_available) / 100) {
 		spin_unlock(&drm_mem_lock);
 		return 0;
 	}
diff --git a/linux/proc.c b/linux/proc.c
index 0883d718..33a5b20e 100644
--- a/linux/proc.c
+++ b/linux/proc.c
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Fri Dec  3 09:44:16 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -382,7 +382,8 @@ static int _drm_vma_info(char *buf, char **start, off_t offset, int len,
 			       vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
 			       vma->vm_flags & VM_LOCKED   ? 'l' : '-',
 			       vma->vm_flags & VM_IO	   ? 'i' : '-',
-			       vma->vm_offset );
+			       VM_OFFSET(vma));
+		
 #if defined(__i386__)
 		pgprot = pgprot_val(vma->vm_page_prot);
 		DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
@@ -393,7 +394,7 @@ static int _drm_vma_info(char *buf, char **start, off_t offset, int len,
 			       pgprot & _PAGE_PCD      ? 'u' : 'c',
 			       pgprot & _PAGE_ACCESSED ? 'a' : '-',
 			       pgprot & _PAGE_DIRTY    ? 'd' : '-',
-			       pgprot & _PAGE_4M       ? 'm' : 'k',
+			       pgprot & _PAGE_PSE      ? 'm' : 'k',
 			       pgprot & _PAGE_GLOBAL   ? 'g' : 'l' );
 #endif		
 		DRM_PROC_PRINT("\n");
diff --git a/linux/vm.c b/linux/vm.c
index 89803784..d649a6e7 100644
--- a/linux/vm.c
+++ b/linux/vm.c
@@ -1,6 +1,6 @@
 /* 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
+ * Revised: Mon Dec  6 16:54:35 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * All Rights Reserved.
@@ -50,18 +50,32 @@ struct vm_operations_struct   drm_vm_dma_ops = {
 	close:	 drm_vm_close,
 };
 
+#if LINUX_VERSION_CODE < 0x020317
 unsigned long drm_vm_nopage(struct vm_area_struct *vma,
 			    unsigned long address,
 			    int write_access)
+#else
+				/* Return type changed in 2.3.23 */
+struct page *drm_vm_nopage(struct vm_area_struct *vma,
+			   unsigned long address,
+			   int write_access)
+#endif
 {
 	DRM_DEBUG("0x%08lx, %d\n", address, write_access);
 
-	return 0;		/* Disallow mremap */
+	return NOPAGE_SIGBUS;		/* Disallow mremap */
 }
 
+#if LINUX_VERSION_CODE < 0x020317
 unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma,
 				unsigned long address,
 				int write_access)
+#else
+				/* Return type changed in 2.3.23 */
+struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
+			       unsigned long address,
+			       int write_access)
+#endif
 {
 	drm_file_t	 *priv	 = vma->vm_file->private_data;
 	drm_device_t	 *dev	 = priv->dev;
@@ -69,8 +83,8 @@ unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma,
 	unsigned long	 offset;
 	unsigned long	 page;
 
-	if (address > vma->vm_end) return 0; /* Disallow mremap */
-	if (!dev->lock.hw_lock)    return 0; /* Nothing allocated */
+	if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
+	if (!dev->lock.hw_lock)    return NOPAGE_OOM;  /* Nothing allocated */
 
 	offset	 = address - vma->vm_start;
 	page	 = offset >> PAGE_SHIFT;
@@ -78,12 +92,23 @@ unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma,
 	atomic_inc(&mem_map[MAP_NR(physical)].count); /* Dec. by kernel */
 
 	DRM_DEBUG("0x%08lx (page %lu) => 0x%08lx\n", address, page, physical);
+#if LINUX_VERSION_CODE < 0x020317
 	return physical;
+#else
+	return mem_map + MAP_NR(physical);
+#endif
 }
 
+#if LINUX_VERSION_CODE < 0x020317
 unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma,
 				unsigned long address,
 				int write_access)
+#else
+				/* Return type changed in 2.3.23 */
+struct page *drm_vm_dma_nopage(struct vm_area_struct *vma,
+			       unsigned long address,
+			       int write_access)
+#endif
 {
 	drm_file_t	 *priv	 = vma->vm_file->private_data;
 	drm_device_t	 *dev	 = priv->dev;
@@ -92,17 +117,21 @@ unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma,
 	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 */
+	if (!dma)		   return NOPAGE_SIGBUS; /* Error */
+	if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
+	if (!dma->pagelist)	   return NOPAGE_OOM ; /* Nothing allocated */
 
-	offset	 = address - vma->vm_start; /* vm_offset should be 0 */
+	offset	 = address - vma->vm_start; /* vm_[pg]off[set] 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);
+#if LINUX_VERSION_CODE < 0x020317
 	return physical;
+#else
+	return mem_map + MAP_NR(physical);
+#endif
 }
 
 void drm_vm_open(struct vm_area_struct *vma)
@@ -169,7 +198,7 @@ int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
 	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);
+		  vma->vm_start, vma->vm_end, VM_OFFSET(vma));
 
 				/* Length must match exact page count */
 	if ((length >> PAGE_SHIFT) != dma->page_count) return -EINVAL;
@@ -195,9 +224,9 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
 	int		i;
 	
 	DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
-		  vma->vm_start, vma->vm_end, vma->vm_offset);
+		  vma->vm_start, vma->vm_end, VM_OFFSET(vma));
 
-	if (!vma->vm_offset) return drm_mmap_dma(filp, vma);
+	if (!VM_OFFSET(vma)) return drm_mmap_dma(filp, vma);
 
 				/* A sequential search of a linked list is
 				   fine here because: 1) there will only be
@@ -208,7 +237,7 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
 				   bit longer. */
 	for (i = 0; i < dev->map_count; i++) {
 		map = dev->maplist[i];
-		if (map->offset == vma->vm_offset) break;
+		if (map->offset == VM_OFFSET(vma)) break;
 	}
 	
 	if (i >= dev->map_count) return -EINVAL;
@@ -222,7 +251,7 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
 	switch (map->type) {
 	case _DRM_FRAME_BUFFER:
 	case _DRM_REGISTERS:
-		if (vma->vm_offset >= __pa(high_memory)) {
+		if (VM_OFFSET(vma) >= __pa(high_memory)) {
 #if defined(__i386__)
 			if (boot_cpu_data.x86 > 3) {
 				pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
@@ -232,7 +261,7 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
 			vma->vm_flags |= VM_IO;	/* not in core dump */
 		}
 		if (remap_page_range(vma->vm_start,
-				     vma->vm_offset,
+				     VM_OFFSET(vma),
 				     vma->vm_end - vma->vm_start,
 				     vma->vm_page_prot))
 				return -EAGAIN;
@@ -249,7 +278,15 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
 	}
 	vma->vm_flags |= VM_LOCKED | VM_SHM; /* Don't swap */
 	if (map->flags & _DRM_READ_ONLY) {
+#if defined(__i386__)
 		pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
+#else
+				/* Ye gads this is ugly.  With more thought
+                                   we could move this up higher and use
+                                   `protection_map' instead.  */
+		vma->vm_page_prot = __pgprot(pte_val(pte_wrprotect(
+			__pte(pgprot_val(vma->vm_page_prot)))));
+#endif
 	}