Merged ati-pcigart-1-0-0

13 files changed, 752 insertions, 25 deletions

diff --git a/linux-core/ati_pcigart.c b/linux-core/ati_pcigart.c
new file mode 100644
index 00000000..93c5148f
--- /dev/null
+++ b/linux-core/ati_pcigart.c
@@ -0,0 +1,138 @@
+/* ati_pcigart.h -- ATI PCI GART support -*- linux-c -*-
+ * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
+ *
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * 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.
+ *
+ * Authors:
+ *   Gareth Hughes <gareth@valinux.com>
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+#if PAGE_SIZE == 8192
+# define ATI_PCIGART_TABLE_ORDER 	2
+# define ATI_PCIGART_TABLE_PAGES 	(1 << 2)
+#elif PAGE_SIZE == 4096
+# define ATI_PCIGART_TABLE_ORDER 	3
+# define ATI_PCIGART_TABLE_PAGES 	(1 << 3)
+#elif
+# error - PAGE_SIZE not 8K or 4K
+#endif
+
+# define ATI_MAX_PCIGART_PAGES		8192	/* 32 MB aperture, 4K pages */
+# define ATI_PCIGART_PAGE_SIZE		4096	/* PCI GART page size */
+
+static unsigned long DRM(ati_alloc_pcigart_table)( void )
+{
+	unsigned long address;
+	struct page *page;
+	int i;
+	DRM_DEBUG( "%s\n", __FUNCTION__ );
+
+	address = __get_free_pages( GFP_KERNEL, ATI_PCIGART_TABLE_ORDER );
+	if ( address == 0UL ) {
+		return 0;
+	}
+
+	page = virt_to_page( address );
+
+	for ( i = 0 ; i <= ATI_PCIGART_TABLE_PAGES ; i++, page++ ) {
+		atomic_inc( &page->count );
+		SetPageReserved( page );
+	}
+
+	DRM_DEBUG( "%s: returning 0x%08lx\n", __FUNCTION__, address );
+	return address;
+}
+
+static void DRM(ati_free_pcigart_table)( unsigned long address )
+{
+	struct page *page;
+	int i;
+	DRM_DEBUG( "%s\n", __FUNCTION__ );
+
+	if ( !address ) return;
+
+	page = virt_to_page( address );
+
+	for ( i = 0 ; i <= ATI_PCIGART_TABLE_PAGES ; i++, page++ ) {
+		atomic_dec( &page->count );
+		ClearPageReserved( page );
+	}
+
+	free_pages( address, ATI_PCIGART_TABLE_ORDER );
+}
+
+unsigned long DRM(ati_pcigart_init)( drm_device_t *dev )
+{
+	drm_sg_mem_t *entry = dev->sg;
+	unsigned long address;
+	unsigned long pages;
+	u32 *pci_gart, page_base;
+	int i, j;
+
+	if ( !entry ) {
+		DRM_ERROR( "no scatter/gather memory!\n" );
+		return 0;
+	}
+
+	address = DRM(ati_alloc_pcigart_table)();
+	if ( !address ) {
+		DRM_ERROR( "cannot allocate PCI GART page!\n" );
+		return 0;
+	}
+
+	pci_gart = (u32 *)address;
+
+	pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
+		? entry->pages : ATI_MAX_PCIGART_PAGES;
+
+	memset( pci_gart, 0, ATI_MAX_PCIGART_PAGES * sizeof(u32) );
+
+	for ( i = 0 ; i < pages ; i++ ) {
+		page_base = virt_to_bus( entry->pagelist[i]->virtual );
+		for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
+			*pci_gart++ = cpu_to_le32( page_base );
+			page_base += ATI_PCIGART_PAGE_SIZE;
+		}
+	}
+
+#if __i386__
+	asm volatile ( "wbinvd" ::: "memory" );
+#else
+	mb();
+#endif
+
+	return address;
+}
+
+int DRM(ati_pcigart_cleanup)( unsigned long address )
+{
+
+	if ( address ) {
+		DRM(ati_free_pcigart_table)( address );
+	}
+
+	return 0;
+}
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 274e318a..085d1cb8 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -53,7 +53,7 @@
 #include <linux/sched.h>
 #include <linux/smp_lock.h>	/* For (un)lock_kernel */
 #include <linux/mm.h>
-#ifdef __alpha__
+#if defined(__alpha__) || defined(__powerpc__)
 #include <asm/pgtable.h> /* For pte_wrprotect */
 #endif
 #include <asm/io.h>
@@ -145,6 +145,7 @@
 #define DRM_MEM_BOUNDAGP  17
 #define DRM_MEM_CTXBITMAP 18
 #define DRM_MEM_STUB      19
+#define DRM_MEM_SGLISTS   20
 
 #define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
 
@@ -199,7 +200,7 @@ __cmpxchg_u32(volatile int *m, int old, int new)
 	unsigned long prev, cmp;
 
 	__asm__ __volatile__(
-	"1:	ldl_l %0,%2\n"
+	"1:	ldl_l %0,%5\n"
 	"	cmpeq %0,%3,%1\n"
 	"	beq %1,2f\n"
 	"	mov %4,%1\n"
@@ -210,7 +211,8 @@ __cmpxchg_u32(volatile int *m, int old, int new)
 	"3:	br 1b\n"
 	".previous"
 	: "=&r"(prev), "=&r"(cmp), "=m"(*m)
-	: "r"((long) old), "r"(new), "m"(*m));
+	: "r"((long) old), "r"(new), "m"(*m)
+	: "memory" );
 
 	return prev;
 }
@@ -221,7 +223,7 @@ __cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
 	unsigned long prev, cmp;
 
 	__asm__ __volatile__(
-	"1:	ldq_l %0,%2\n"
+	"1:	ldq_l %0,%5\n"
 	"	cmpeq %0,%3,%1\n"
 	"	beq %1,2f\n"
 	"	mov %4,%1\n"
@@ -232,7 +234,8 @@ __cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
 	"3:	br 1b\n"
 	".previous"
 	: "=&r"(prev), "=&r"(cmp), "=m"(*m)
-	: "r"((long) old), "r"(new), "m"(*m));
+	: "r"((long) old), "r"(new), "m"(*m)
+	: "memory" );
 
 	return prev;
 }
@@ -284,12 +287,43 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 	return old;
 }
 
+#elif defined(__powerpc__)
+extern void __cmpxchg_called_with_bad_pointer(void);
+static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
+                                      unsigned long new, int size)
+{
+	unsigned long prev;
+
+	switch (size) {
+	case 4:
+		__asm__ __volatile__(
+			"sync;"
+			"0:    lwarx %0,0,%1 ;"
+			"      cmpl 0,%0,%3;"
+			"      bne 1f;"
+			"      stwcx. %2,0,%1;"
+			"      bne- 0b;"
+			"1:    "
+			"sync;"
+			: "=&r"(prev)
+			: "r"(ptr), "r"(new), "r"(old)
+			: "cr0", "memory");
+		return prev;
+	}
+	__cmpxchg_called_with_bad_pointer();
+	return old;
+}
+
+#endif /* i386, powerpc & alpha */
+
+#ifndef __alpha__
 #define cmpxchg(ptr,o,n)						\
   ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),		\
 				 (unsigned long)(n),sizeof(*(ptr))))
-#endif /* i386 & alpha */
 #endif
 
+#endif /* !__HAVE_ARCH_CMPXCHG */
+
 				/* Macros to make printk easier */
 #define DRM_ERROR(fmt, arg...) \
 	printk(KERN_ERR "[" DRM_NAME ":" __FUNCTION__ "] *ERROR* " fmt , ##arg)
@@ -547,7 +581,8 @@ typedef struct drm_device_dma {
 	unsigned long	  *pagelist;
 	unsigned long	  byte_count;
 	enum {
-		_DRM_DMA_USE_AGP = 0x01
+		_DRM_DMA_USE_AGP = 0x01,
+		_DRM_DMA_USE_SG  = 0x02
 	} flags;
 
 				/* DMA support */
@@ -579,6 +614,13 @@ typedef struct drm_agp_head {
 } drm_agp_head_t;
 #endif
 
+typedef struct drm_sg_mem {
+	unsigned long   handle;
+	void            *virtual;
+	int             pages;
+	struct page     **pagelist;
+} drm_sg_mem_t;
+
 typedef struct drm_sigdata {
 	int           context;
 	drm_hw_lock_t *lock;
@@ -667,6 +709,10 @@ typedef struct drm_device {
 #if __REALLY_HAVE_AGP
 	drm_agp_head_t    *agp;
 #endif
+#ifdef __alpha__
+	struct pci_controler *hose;
+#endif
+	drm_sg_mem_t      *sg;  /* Scatter gather memory */
 	unsigned long     *ctx_bitmap;
 	void		  *dev_private;
 	drm_sigdata_t     sigdata; /* For block_all_signals */
@@ -718,6 +764,9 @@ 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);
+extern unsigned long DRM(vm_sg_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,
@@ -729,6 +778,9 @@ extern struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
 extern struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma,
 				       unsigned long address,
 				       int write_access);
+extern struct page *DRM(vm_sg_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);
@@ -947,5 +999,16 @@ extern int            DRM(proc_cleanup)(int minor,
 					struct proc_dir_entry *root,
 					struct proc_dir_entry *dev_root);
 
+				/* Scatter Gather Support (drm_scatter.h) */
+extern void           DRM(sg_cleanup)(drm_sg_mem_t *entry);
+extern int            DRM(sg_alloc)(struct inode *inode, struct file *filp,
+				    unsigned int cmd, unsigned long arg);
+extern int            DRM(sg_free)(struct inode *inode, struct file *filp,
+				   unsigned int cmd, unsigned long arg);
+
+                               /* ATI PCIGART support (ati_pcigart.h) */
+extern unsigned long  DRM(ati_pcigart_init)(drm_device_t *dev);
+extern int            DRM(ati_pcigart_cleanup)(unsigned long address);
+
 #endif /* __KERNEL__ */
 #endif
diff --git a/linux-core/drm_agpsupport.c b/linux-core/drm_agpsupport.c
index dfd0d8fc..9b056c75 100644
--- a/linux-core/drm_agpsupport.c
+++ b/linux-core/drm_agpsupport.c
@@ -52,7 +52,8 @@ int DRM(agp_info)(struct inode *inode, struct file *filp,
 	agp_kern_info    *kern;
 	drm_agp_info_t   info;
 
-	if (!dev->agp->acquired || !drm_agp->copy_info) return -EINVAL;
+	if (!dev->agp || !dev->agp->acquired || !drm_agp->copy_info)
+		return -EINVAL;
 
 	kern                   = &dev->agp->agp_info;
 	info.agp_version_major = kern->version.major;
@@ -77,7 +78,8 @@ int DRM(agp_acquire)(struct inode *inode, struct file *filp,
 	drm_device_t	 *dev	 = priv->dev;
 	int              retcode;
 
-	if (!dev->agp|| dev->agp->acquired || !drm_agp->acquire) return -EINVAL;
+	if (!dev->agp || dev->agp->acquired || !drm_agp->acquire)
+		return -EINVAL;
 	if ((retcode = drm_agp->acquire())) return retcode;
 	dev->agp->acquired = 1;
 	return 0;
@@ -89,7 +91,8 @@ int DRM(agp_release)(struct inode *inode, struct file *filp,
 	drm_file_t	 *priv	 = filp->private_data;
 	drm_device_t	 *dev	 = priv->dev;
 
-	if (!dev->agp->acquired || !drm_agp->release) return -EINVAL;
+	if (!dev->agp || !dev->agp->acquired || !drm_agp->release)
+		return -EINVAL;
 	drm_agp->release();
 	dev->agp->acquired = 0;
 	return 0;
@@ -108,7 +111,8 @@ int DRM(agp_enable)(struct inode *inode, struct file *filp,
 	drm_device_t	 *dev	 = priv->dev;
 	drm_agp_mode_t   mode;
 
-	if (!dev->agp->acquired || !drm_agp->enable) return -EINVAL;
+	if (!dev->agp || !dev->agp->acquired || !drm_agp->enable)
+		return -EINVAL;
 
 	if (copy_from_user(&mode, (drm_agp_mode_t *)arg, sizeof(mode)))
 		return -EFAULT;
@@ -131,7 +135,7 @@ int DRM(agp_alloc)(struct inode *inode, struct file *filp,
 	unsigned long    pages;
 	u32 		 type;
 
-	if (!dev->agp->acquired) return -EINVAL;
+	if (!dev->agp || !dev->agp->acquired) return -EINVAL;
 	if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request)))
 		return -EFAULT;
 	if (!(entry = DRM(alloc)(sizeof(*entry), DRM_MEM_AGPLISTS)))
@@ -188,7 +192,7 @@ int DRM(agp_unbind)(struct inode *inode, struct file *filp,
 	drm_agp_binding_t request;
 	drm_agp_mem_t     *entry;
 
-	if (!dev->agp->acquired) return -EINVAL;
+	if (!dev->agp || !dev->agp->acquired) return -EINVAL;
 	if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request)))
 		return -EFAULT;
 	if (!(entry = DRM(agp_lookup_entry)(dev, request.handle)))
@@ -207,7 +211,8 @@ int DRM(agp_bind)(struct inode *inode, struct file *filp,
 	int               retcode;
 	int               page;
 
-	if (!dev->agp->acquired || !drm_agp->bind_memory) return -EINVAL;
+	if (!dev->agp || !dev->agp->acquired || !drm_agp->bind_memory)
+		return -EINVAL;
 	if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request)))
 		return -EFAULT;
 	if (!(entry = DRM(agp_lookup_entry)(dev, request.handle)))
@@ -229,7 +234,7 @@ int DRM(agp_free)(struct inode *inode, struct file *filp,
 	drm_agp_buffer_t request;
 	drm_agp_mem_t    *entry;
 
-	if (!dev->agp->acquired) return -EINVAL;
+	if (!dev->agp || !dev->agp->acquired) return -EINVAL;
 	if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request)))
 		return -EFAULT;
 	if (!(entry = DRM(agp_lookup_entry)(dev, request.handle)))
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index b1111048..16af7bd5 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -37,6 +37,10 @@
 #define __HAVE_PCI_DMA		0
 #endif
 
+#ifndef __HAVE_SG
+#define __HAVE_SG		0
+#endif
+
 #ifndef DRIVER_BUF_PRIV_T
 #define DRIVER_BUF_PRIV_T		u32
 #endif
@@ -103,13 +107,16 @@ int DRM(addmap)( struct inode *inode, struct file *filp,
 	switch ( map->type ) {
 	case _DRM_REGISTERS:
 	case _DRM_FRAME_BUFFER:
-#ifndef __sparc__
+#if !defined(__sparc__) && !defined(__alpha__)
 		if ( map->offset + map->size < map->offset ||
 		     map->offset < virt_to_phys(high_memory) ) {
 			DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
 			return -EINVAL;
 		}
 #endif
+#ifdef __alpha__
+		map->offset += dev->hose->mem_space->start;
+#endif
 #if __REALLY_HAVE_MTRR
 		if ( map->type == _DRM_FRAME_BUFFER ||
 		     (map->flags & _DRM_WRITE_COMBINING) ) {
@@ -135,10 +142,21 @@ int DRM(addmap)( struct inode *inode, struct file *filp,
 		break;
 #if __REALLY_HAVE_AGP
 	case _DRM_AGP:
+#ifdef __alpha__
+		map->offset += dev->hose->mem_space->start;
+#endif
 		map->offset = map->offset + dev->agp->base;
 		map->mtrr   = dev->agp->agp_mtrr; /* for getmap */
 		break;
 #endif
+	case _DRM_SCATTER_GATHER:
+		if (!dev->sg) {
+			DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
+			return -EINVAL;
+		}
+		map->offset = map->offset + dev->sg->handle;
+		break;
+
 	default:
 		DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
 		return -EINVAL;
@@ -237,6 +255,7 @@ int DRM(rmmap)(struct inode *inode, struct file *filp,
 			vfree(map->handle);
 			break;
 		case _DRM_AGP:
+		case _DRM_SCATTER_GATHER:
 			break;
 		}
 		DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
@@ -565,6 +584,159 @@ int DRM(addbufs_pci)( struct inode *inode, struct file *filp,
 }
 #endif /* __HAVE_PCI_DMA */
 
+#ifdef __HAVE_SG
+int DRM(addbufs_sg)( 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;
+       drm_buf_entry_t *entry;
+       drm_buf_t *buf;
+       unsigned long offset;
+       unsigned long agp_offset;
+       int count;
+       int order;
+       int size;
+       int alignment;
+       int page_order;
+       int total;
+       int byte_count;
+       int i;
+
+       if ( !dma ) return -EINVAL;
+
+       if ( copy_from_user( &request, (drm_buf_desc_t *)arg,
+                            sizeof(request) ) )
+               return -EFAULT;
+
+       count = request.count;
+       order = DRM(order)( request.size );
+       size = 1 << order;
+
+       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;
+
+       byte_count = 0;
+       agp_offset = request.agp_start;
+
+       DRM_DEBUG( "count:      %d\n",  count );
+       DRM_DEBUG( "order:      %d\n",  order );
+       DRM_DEBUG( "size:       %d\n",  size );
+       DRM_DEBUG( "agp_offset: %ld\n", agp_offset );
+       DRM_DEBUG( "alignment:  %d\n",  alignment );
+       DRM_DEBUG( "page_order: %d\n",  page_order );
+       DRM_DEBUG( "total:      %d\n",  total );
+
+       if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL;
+       if ( dev->queue_count ) return -EBUSY; /* Not while in use */
+
+       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->buf_size = size;
+       entry->page_order = page_order;
+
+       offset = 0;
+
+       while ( entry->buf_count < 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 + offset);
+               buf->bus_address = agp_offset + offset;
+               buf->address = (void *)(agp_offset + offset + dev->sg->handle);
+               buf->next    = NULL;
+               buf->waiting = 0;
+               buf->pending = 0;
+               init_waitqueue_head( &buf->dma_wait );
+               buf->pid     = 0;
+
+               buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
+               buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T),
+                                              DRM_MEM_BUFS );
+               memset( buf->dev_private, 0, buf->dev_priv_size );
+
+#if __HAVE_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 );
+
+               offset += alignment;
+               entry->buf_count++;
+               byte_count += PAGE_SIZE << page_order;
+       }
+
+       DRM_DEBUG( "byte_count: %d\n", byte_count );
+
+       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 = 0 ; i < entry->buf_count ; i++ ) {
+               dma->buflist[i + dma->buf_count] = &entry->buflist[i];
+       }
+
+       dma->buf_count += entry->buf_count;
+       dma->byte_count += byte_count;
+
+       DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
+       DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
+
+#if __HAVE_DMA_FREELIST
+       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] );
+       }
+#endif
+       up( &dev->struct_sem );
+
+       request.count = entry->buf_count;
+       request.size = size;
+
+       if ( copy_to_user( (drm_buf_desc_t *)arg, &request, sizeof(request) ) )
+               return -EFAULT;
+
+       dma->flags = _DRM_DMA_USE_SG;
+
+       atomic_dec( &dev->buf_alloc );
+       return 0;
+}
+#endif /* __HAVE_SG */
+
 int DRM(addbufs)( struct inode *inode, struct file *filp,
 		  unsigned int cmd, unsigned long arg )
 {
@@ -579,6 +751,11 @@ int DRM(addbufs)( struct inode *inode, struct file *filp,
 		return DRM(addbufs_agp)( inode, filp, cmd, arg );
 	else
 #endif
+#if __HAVE_SG
+	if ( request.flags & _DRM_SG_BUFFER )
+		return DRM(addbufs_sg)( inode, filp, cmd, arg );
+	else
+#endif
 #if __HAVE_PCI_DMA
 		return DRM(addbufs_pci)( inode, filp, cmd, arg );
 #else
@@ -760,7 +937,8 @@ int DRM(mapbufs)( struct inode *inode, struct file *filp,
 		return -EFAULT;
 
 	if ( request.count >= dma->buf_count ) {
-		if ( __HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP) ) {
+		if ( (__HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP)) ||
+		     (__HAVE_SG && (dma->flags & _DRM_DMA_USE_SG)) ) {
 			drm_map_t *map = DRIVER_AGP_BUFFERS_MAP( dev );
 
 			if ( !map ) {
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 7447ca6d..3791d7a8 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -81,6 +81,9 @@
 #ifndef __HAVE_COUNTERS
 #define __HAVE_COUNTERS			0
 #endif
+#ifndef __HAVE_SG
+#define __HAVE_SG			0
+#endif
 
 #ifndef DRIVER_PREINIT
 #define DRIVER_PREINIT()
@@ -178,6 +181,11 @@ static drm_ioctl_desc_t		  DRM(ioctls)[] = {
 	[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)]    = { DRM(agp_unbind),  1, 1 },
 #endif
 
+#if __HAVE_SG
+	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)]      = { DRM(sg_alloc),    1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)]       = { DRM(sg_free),     1, 1 },
+#endif
+
 	DRIVER_IOCTLS
 };
 
@@ -415,6 +423,12 @@ static int DRM(takedown)( drm_device_t *dev )
 				 * handled in the AGP/GART driver.
 				 */
 				break;
+                       case _DRM_SCATTER_GATHER:
+				if(dev->sg) {
+					DRM(sg_cleanup)(dev->sg);
+					dev->sg = NULL;
+				}
+				break;
 			}
  			DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
  		}
diff --git a/linux-core/drm_fops.c b/linux-core/drm_fops.c
index dd574766..75752b3a 100644
--- a/linux-core/drm_fops.c
+++ b/linux-core/drm_fops.c
@@ -70,6 +70,21 @@ int DRM(open_helper)(struct inode *inode, struct file *filp, drm_device_t *dev)
 	}
 	up(&dev->struct_sem);
 
+#ifdef __alpha__
+	/*
+	 * Default the hose
+	 */
+	if (!dev->hose) {
+		struct pci_dev *pci_dev;
+		pci_dev = pci_find_class(PCI_CLASS_DISPLAY_VGA << 8, NULL);
+		if (pci_dev) dev->hose = pci_dev->sysdata;
+		if (!dev->hose) {
+			struct pci_bus *b = pci_bus_b(pci_root_buses.next);
+			if (b) dev->hose = b->sysdata;
+		}
+	}
+#endif
+
 	return 0;
 }
 
diff --git a/linux-core/drm_init.c b/linux-core/drm_init.c
index 9ae98414..d9d8e3a2 100644
--- a/linux-core/drm_init.c
+++ b/linux-core/drm_init.c
@@ -32,7 +32,11 @@
 #define __NO_VERSION__
 #include "drmP.h"
 
+#if 0
+int DRM(flags) = DRM_FLAG_DEBUG;
+#else
 int DRM(flags) = 0;
+#endif
 
 /* drm_parse_option parses a single option.  See description for
  * drm_parse_options for details.
diff --git a/linux-core/drm_ioctl.c b/linux-core/drm_ioctl.c
index 2fba6b0c..1cc8f31f 100644
--- a/linux-core/drm_ioctl.c
+++ b/linux-core/drm_ioctl.c
@@ -95,6 +95,27 @@ int DRM(setunique)(struct inode *inode, struct file *filp,
 				  DRM_MEM_DRIVER);
 	sprintf(dev->devname, "%s@%s", dev->name, dev->unique);
 
+#ifdef __alpha__
+	do {
+		struct pci_dev *pci_dev;
+                int b, d, f;
+                char *p;
+ 
+                for(p = dev->unique; p && *p && *p != ':'; p++);
+                if (!p || !*p) break;
+                b = (int)simple_strtoul(p+1, &p, 10);
+                if (*p != ':') break;
+                d = (int)simple_strtoul(p+1, &p, 10);
+                if (*p != ':') break;
+                f = (int)simple_strtoul(p+1, &p, 10);
+                if (*p) break;
+ 
+                pci_dev = pci_find_slot(b, PCI_DEVFN(d,f));
+                if (pci_dev)
+                        dev->hose = pci_dev->sysdata;
+        } while(0);
+#endif
+
 	return 0;
 }
 
diff --git a/linux-core/drm_memory.h b/linux-core/drm_memory.h
index 1763d9b4..498937d4 100644
--- a/linux-core/drm_memory.h
+++ b/linux-core/drm_memory.h
@@ -63,6 +63,7 @@ static drm_mem_stats_t	  DRM(mem_stats)[]   = {
 	[DRM_MEM_MAPPINGS]  = { "mappings" },
 	[DRM_MEM_BUFLISTS]  = { "buflists" },
 	[DRM_MEM_AGPLISTS]  = { "agplist"  },
+	[DRM_MEM_SGLISTS]   = { "sglist"   },
 	[DRM_MEM_TOTALAGP]  = { "totalagp" },
 	[DRM_MEM_BOUNDAGP]  = { "boundagp" },
 	[DRM_MEM_CTXBITMAP] = { "ctxbitmap"},
diff --git a/linux-core/drm_scatter.c b/linux-core/drm_scatter.c
new file mode 100644
index 00000000..a0371074
--- /dev/null
+++ b/linux-core/drm_scatter.c
@@ -0,0 +1,218 @@
+/* drm_scatter.h -- IOCTLs to manage scatter/gather memory -*- linux-c -*-
+ * Created: Mon Dec 18 23:20:54 2000 by gareth@valinux.com
+ *
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * 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.
+ *
+ * Authors:
+ *   Gareth Hughes <gareth@valinux.com>
+ */
+
+#define __NO_VERSION__
+#include <linux/config.h>
+#include <linux/vmalloc.h>
+#include "drmP.h"
+
+#define DEBUG_SCATTER 0
+
+void DRM(sg_cleanup)( drm_sg_mem_t *entry )
+{
+	struct page *page;
+	int i;
+
+	for ( i = 0 ; i < entry->pages ; i++ ) {
+		page = entry->pagelist[i];
+		if ( page )
+			ClearPageReserved( page );
+	}
+
+	vfree( entry->virtual );
+
+	DRM(free)( entry->pagelist,
+		  entry->pages * sizeof(*entry->pagelist),
+		  DRM_MEM_PAGES );
+	DRM(free)( entry,
+		  sizeof(*entry),
+		  DRM_MEM_SGLISTS );
+}
+
+int DRM(sg_alloc)( 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_scatter_gather_t request;
+	drm_sg_mem_t *entry;
+	unsigned long pages, i, j;
+	pgd_t *pgd;
+	pmd_t *pmd;
+	pte_t *pte;
+
+	DRM_DEBUG( "%s\n", __FUNCTION__ );
+
+	if ( dev->sg )
+		return -EINVAL;
+
+	if ( copy_from_user( &request,
+			     (drm_scatter_gather_t *)arg,
+			     sizeof(request) ) )
+		return -EFAULT;
+
+	entry = DRM(alloc)( sizeof(*entry), DRM_MEM_SGLISTS );
+	if ( !entry )
+		return -ENOMEM;
+
+   	memset( entry, 0, sizeof(*entry) );
+
+	pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
+	DRM_DEBUG( "sg size=%ld pages=%ld\n", request.size, pages );
+
+	entry->pages = pages;
+	entry->pagelist = DRM(alloc)( pages * sizeof(*entry->pagelist),
+				     DRM_MEM_PAGES );
+	if ( !entry->pagelist ) {
+		DRM(free)( entry, sizeof(*entry), DRM_MEM_SGLISTS );
+		return -ENOMEM;
+	}
+
+	entry->virtual = vmalloc_32( pages << PAGE_SHIFT );
+	if ( !entry->virtual ) {
+		DRM(free)( entry->pagelist,
+			  entry->pages * sizeof(*entry->pagelist),
+			  DRM_MEM_PAGES );
+		DRM(free)( entry,
+			  sizeof(*entry),
+			  DRM_MEM_SGLISTS );
+		return -ENOMEM;
+	}
+
+	/* This also forces the mapping of COW pages, so our page list
+	 * will be valid.  Please don't remove it...
+	 */
+	memset( entry->virtual, 0, pages << PAGE_SHIFT );
+
+	entry->handle = (unsigned long)entry->virtual;
+
+	DRM_DEBUG( "sg alloc handle  = %08lx\n", entry->handle );
+	DRM_DEBUG( "sg alloc virtual = %p\n", entry->virtual );
+
+	for ( i = entry->handle, j = 0 ; j < pages ; i += PAGE_SIZE, j++ ) {
+		pgd = pgd_offset_k( i );
+		if ( !pgd_present( *pgd ) )
+			goto failed;
+
+		pmd = pmd_offset( pgd, i );
+		if ( !pmd_present( *pmd ) )
+			goto failed;
+
+		pte = pte_offset( pmd, i );
+		if ( !pte_present( *pte ) )
+			goto failed;
+
+		entry->pagelist[j] = pte_page( *pte );
+
+		SetPageReserved( entry->pagelist[j] );
+	}
+
+	request.handle = entry->handle;
+
+	if ( copy_to_user( (drm_scatter_gather_t *)arg,
+			   &request,
+			   sizeof(request) ) ) {
+		DRM(sg_cleanup)( entry );
+		return -EFAULT;
+	}
+
+	dev->sg = entry;
+
+#if DEBUG_SCATTER
+	/* Verify that each page points to its virtual address, and vice
+	 * versa.
+	 */
+	{
+	int error = 0;
+
+	for ( i = 0 ; i < pages ; i++ ) {
+		unsigned long *tmp;
+
+		tmp = (unsigned long *)entry->pagelist[i]->virtual;
+		for ( j = 0 ;
+		      j < PAGE_SIZE / sizeof(unsigned long) ;
+		      j++, tmp++ ) {
+			*tmp = 0xcafebabe;
+		}
+		tmp = (unsigned long *)((u8 *)entry->virtual +
+					(PAGE_SIZE * i));
+		for( j = 0 ;
+		     j < PAGE_SIZE / sizeof(unsigned long) ;
+		     j++, tmp++ ) {
+			if ( *tmp != 0xcafebabe && error == 0 ) {
+				error = 1;
+				DRM_ERROR( "Scatter allocation error, "
+					   "pagelist does not match "
+					   "virtual mapping\n" );
+			}
+		}
+		tmp = (unsigned long *)entry->pagelist[i]->virtual;
+		for(j = 0 ;
+		    j < PAGE_SIZE / sizeof(unsigned long) ;
+		    j++, tmp++) {
+			*tmp = 0;
+		}
+	}
+	if (error == 0)
+		DRM_ERROR( "Scatter allocation matches pagelist\n" );
+	}
+#endif
+
+	return 0;
+
+ failed:
+	DRM(sg_cleanup)( entry );
+	return -ENOMEM;
+}
+
+int DRM(sg_free)( 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_scatter_gather_t request;
+	drm_sg_mem_t *entry;
+
+	if ( copy_from_user( &request,
+			     (drm_scatter_gather_t *)arg,
+			     sizeof(request) ) )
+		return -EFAULT;
+
+	entry = dev->sg;
+	dev->sg = NULL;
+
+	if ( !entry || entry->handle != request.handle )
+		return -EINVAL;
+
+	DRM_DEBUG( "sg free virtual  = %p\n", entry->virtual );
+
+	DRM(sg_cleanup)( entry );
+
+	return 0;
+}
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index fb51926b..771c11bd 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -50,6 +50,12 @@ struct vm_operations_struct   drm_vm_dma_ops = {
 	close:	 DRM(vm_close),
 };
 
+struct vm_operations_struct   drm_vm_sg_ops = {
+	nopage:  DRM(vm_sg_nopage),
+	open:    DRM(vm_open),
+	close:   DRM(vm_close),
+};
+
 #if LINUX_VERSION_CODE < 0x020317
 unsigned long DRM(vm_nopage)(struct vm_area_struct *vma,
 			     unsigned long address,
@@ -93,7 +99,7 @@ struct page *DRM(vm_shm_nopage)(struct vm_area_struct *vma,
 	offset	 = address - vma->vm_start;
 	i = (unsigned long)map->handle + offset;
 	/* We have to walk page tables here because we need large SAREA's, and
-	 * they need to be virtually contigious in kernel space.
+	 * they need to be virtually contiguous in kernel space.
 	 */
 	pgd = pgd_offset_k( i );
 	if( !pgd_present( *pgd ) ) return NOPAGE_OOM;
@@ -187,6 +193,7 @@ void DRM(vm_shm_close)(struct vm_area_struct *vma)
 				vfree(map->handle);
 				break;
 			case _DRM_AGP:
+			case _DRM_SCATTER_GATHER:
 				break;
 			}
 			DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
@@ -230,6 +237,48 @@ struct page *DRM(vm_dma_nopage)(struct vm_area_struct *vma,
 #endif
 }
 
+#if LINUX_VERSION_CODE < 0x020317
+unsigned long DRM(vm_sg_nopage)(struct vm_area_struct *vma,
+				unsigned long address,
+				int write_access)
+#else
+				/* Return type changed in 2.3.23 */
+struct page *DRM(vm_sg_nopage)(struct vm_area_struct *vma,
+			       unsigned long address,
+			       int write_access)
+#endif
+{
+#if LINUX_VERSION_CODE >= 0x020300
+	drm_map_t        *map    = (drm_map_t *)vma->vm_private_data;
+#else
+	drm_map_t        *map    = (drm_map_t *)vma->vm_pte;
+#endif
+	drm_file_t *priv = vma->vm_file->private_data;
+	drm_device_t *dev = priv->dev;
+	drm_sg_mem_t *entry = dev->sg;
+	unsigned long offset;
+	unsigned long map_offset;
+	unsigned long page_offset;
+	struct page *page;
+
+	if (!entry)                return NOPAGE_SIGBUS; /* Error */
+	if (address > vma->vm_end) return NOPAGE_SIGBUS; /* Disallow mremap */
+	if (!entry->pagelist)      return NOPAGE_OOM ;  /* Nothing allocated */
+
+
+	offset = address - vma->vm_start;
+	map_offset = map->offset - dev->sg->handle;
+	page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT);
+	page = entry->pagelist[page_offset];
+	atomic_inc(&page->count);                       /* Dec. by kernel */
+
+#if LINUX_VERSION_CODE < 0x020317
+	return (unsigned long)virt_to_phys(page->virtual);
+#else
+	return page;
+#endif
+}
+
 void DRM(vm_open)(struct vm_area_struct *vma)
 {
 	drm_file_t	*priv	= vma->vm_file->private_data;
@@ -322,6 +371,7 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
 	drm_device_t	*dev	= priv->dev;
 	drm_map_t	*map	= NULL;
 	drm_map_list_t  *r_list;
+	unsigned long   offset  = 0;
 	struct list_head *list;
 
 	DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
@@ -374,19 +424,26 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
 			}
 #elif defined(__ia64__)
 			if (map->type != _DRM_AGP)
-				vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+				vma->vm_page_prot =
+					pgprot_writecombine(vma->vm_page_prot);
+#elif defined(__powerpc__)
+			pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE | _PAGE_GUARDED;
 #endif
 			vma->vm_flags |= VM_IO;	/* not in core dump */
 		}
+#ifdef __alpha__
+                offset = dev->hose->dense_mem_base -
+		         dev->hose->mem_space->start;
+#endif
 		if (remap_page_range(vma->vm_start,
-				     VM_OFFSET(vma),
+				     VM_OFFSET(vma) + offset,
 				     vma->vm_end - vma->vm_start,
 				     vma->vm_page_prot))
 				return -EAGAIN;
 		DRM_DEBUG("   Type = %d; start = 0x%lx, end = 0x%lx,"
 			  " offset = 0x%lx\n",
 			  map->type,
-			  vma->vm_start, vma->vm_end, VM_OFFSET(vma));
+			  vma->vm_start, vma->vm_end, VM_OFFSET(vma) + offset);
 		vma->vm_ops = &drm_vm_ops;
 		break;
 	case _DRM_SHM:
@@ -400,6 +457,15 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
 				   DRM_KERNEL advisory is supported. */
 		vma->vm_flags |= VM_LOCKED;
 		break;
+	case _DRM_SCATTER_GATHER:
+		vma->vm_ops = &drm_vm_sg_ops;
+#if LINUX_VERSION_CODE >= 0x020300
+		vma->vm_private_data = (void *)map;
+#else
+		vma->vm_pte = (unsigned long)map;
+#endif
+                vma->vm_flags |= VM_LOCKED;
+                break;
 	default:
 		return -EINVAL;	/* This should never happen. */
 	}
diff --git a/linux-core/r128_drv.c b/linux-core/r128_drv.c
index daae0f87..584cb29c 100644
--- a/linux-core/r128_drv.c
+++ b/linux-core/r128_drv.c
@@ -33,16 +33,17 @@
 #include "r128.h"
 #include "drmP.h"
 #include "r128_drv.h"
+#include "ati_pcigart.h"
 
 #define DRIVER_AUTHOR		"Gareth Hughes, VA Linux Systems Inc."
 
 #define DRIVER_NAME		"r128"
 #define DRIVER_DESC		"ATI Rage 128"
-#define DRIVER_DATE		"20010308"
+#define DRIVER_DATE		"20010405"
 
 #define DRIVER_MAJOR		2
 #define DRIVER_MINOR		1
-#define DRIVER_PATCHLEVEL	5
+#define DRIVER_PATCHLEVEL	6
 
 #define DRIVER_IOCTLS							    \
    [DRM_IOCTL_NR(DRM_IOCTL_DMA)]             = { r128_cce_buffers,  1, 0 }, \
@@ -88,3 +89,4 @@
 #include "drm_proc.h"
 #include "drm_vm.h"
 #include "drm_stub.h"
+#include "drm_scatter.h"
diff --git a/linux-core/radeon_drv.c b/linux-core/radeon_drv.c
index b022c3bb..d7632667 100644
--- a/linux-core/radeon_drv.c
+++ b/linux-core/radeon_drv.c
@@ -31,16 +31,17 @@
 #include "radeon.h"
 #include "drmP.h"
 #include "radeon_drv.h"
+#include "ati_pcigart.h"
 
 #define DRIVER_AUTHOR		"Gareth Hughes, VA Linux Systems Inc."
 
 #define DRIVER_NAME		"radeon"
 #define DRIVER_DESC		"ATI Radeon"
-#define DRIVER_DATE		"20010402"
+#define DRIVER_DATE		"20010405"
 
 #define DRIVER_MAJOR		1
 #define DRIVER_MINOR		1
-#define DRIVER_PATCHLEVEL	0
+#define DRIVER_PATCHLEVEL	1
 
 #define DRIVER_IOCTLS							     \
  [DRM_IOCTL_NR(DRM_IOCTL_DMA)]               = { radeon_cp_buffers,  1, 0 }, \
@@ -85,3 +86,4 @@
 #include "drm_proc.h"
 #include "drm_vm.h"
 #include "drm_stub.h"
+#include "drm_scatter.h"