Commit Keith Owens kernel Makefile changes, merge and commit alpha patch

    set from Jay Estabrook (sans some mga modifications which broke other
    arch's.)

17 files changed, 448 insertions, 69 deletions

diff --git a/linux-core/Makefile.kernel b/linux-core/Makefile.kernel
index 97b507ee..e2630989 100644
--- a/linux-core/Makefile.kernel
+++ b/linux-core/Makefile.kernel
@@ -3,9 +3,7 @@
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
 O_TARGET	:= drm.o
-export-objs	:= gamma_drv.o tdfx_drv.o r128_drv.o mga_drv.o i810_drv.o \
-		   ffb_drv.o
-list-multi	:= gamma.o tdfx.o r128.o mga.o i810.o ffb.o
+list-multi	:= gamma.o tdfx.o r128.o mga.o i810.o ffb.o radeon.o
 
 gamma-objs  := gamma_drv.o gamma_dma.o
 tdfx-objs   := tdfx_drv.o
diff --git a/linux-core/ati_pcigart.c b/linux-core/ati_pcigart.c
index 93c5148f..99d17ee7 100644
--- a/linux-core/ati_pcigart.c
+++ b/linux-core/ati_pcigart.c
@@ -72,8 +72,6 @@ static void DRM(ati_free_pcigart_table)( unsigned long address )
 	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++ ) {
@@ -84,24 +82,45 @@ static void DRM(ati_free_pcigart_table)( unsigned long address )
 	free_pages( address, ATI_PCIGART_TABLE_ORDER );
 }
 
-unsigned long DRM(ati_pcigart_init)( drm_device_t *dev )
+int DRM(ati_pcigart_init)( drm_device_t *dev,
+			   unsigned long *addr,
+			   dma_addr_t *bus_addr)
 {
 	drm_sg_mem_t *entry = dev->sg;
-	unsigned long address;
+	unsigned long address = 0;
 	unsigned long pages;
-	u32 *pci_gart, page_base;
-	int i, j;
+	u32 *pci_gart, page_base, bus_address = 0;
+	int i, j, ret = 0;
 
 	if ( !entry ) {
 		DRM_ERROR( "no scatter/gather memory!\n" );
-		return 0;
+		goto done;
 	}
 
 	address = DRM(ati_alloc_pcigart_table)();
 	if ( !address ) {
 		DRM_ERROR( "cannot allocate PCI GART page!\n" );
-		return 0;
+		goto done;
+	}
+
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	if ( !dev->pdev ) {
+		DRM_ERROR( "PCI device unknown!\n" );
+		goto done;
+	}
+
+	bus_address = pci_map_single(dev->pdev, (void *)address,
+				  ATI_PCIGART_TABLE_PAGES * PAGE_SIZE,
+				  PCI_DMA_TODEVICE);
+	if (bus_address == 0) {
+		DRM_ERROR( "unable to map PCIGART pages!\n" );
+		DRM(ati_free_pcigart_table)( address );
+		address = 0;
+		goto done;
 	}
+#else
+	bus_address = virt_to_bus( (void *)address );
+#endif
 
 	pci_gart = (u32 *)address;
 
@@ -111,28 +130,78 @@ unsigned long DRM(ati_pcigart_init)( drm_device_t *dev )
 	memset( pci_gart, 0, ATI_MAX_PCIGART_PAGES * sizeof(u32) );
 
 	for ( i = 0 ; i < pages ; i++ ) {
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+		/* we need to support large memory configurations */
+		entry->busaddr[i] = pci_map_single(dev->pdev,
+						   entry->pagelist[i]->virtual,
+						   PAGE_SIZE,
+						   PCI_DMA_TODEVICE);
+		if (entry->busaddr[i] == 0) {
+			DRM_ERROR( "unable to map PCIGART pages!\n" );
+			DRM(ati_pcigart_cleanup)( dev, address, bus_address );
+			address = 0;
+			bus_address = 0;
+			goto done;
+		}
+		page_base = (u32) entry->busaddr[i];
+#else
 		page_base = virt_to_bus( entry->pagelist[i]->virtual );
+#endif
 		for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
 			*pci_gart++ = cpu_to_le32( page_base );
 			page_base += ATI_PCIGART_PAGE_SIZE;
 		}
 	}
 
+	ret = 1;
+
 #if __i386__
 	asm volatile ( "wbinvd" ::: "memory" );
 #else
 	mb();
 #endif
 
-	return address;
+done:
+	*addr = address;
+	*bus_addr = bus_address;
+	return ret;
 }
 
-int DRM(ati_pcigart_cleanup)( unsigned long address )
+int DRM(ati_pcigart_cleanup)( drm_device_t *dev,
+			      unsigned long addr,
+			      dma_addr_t bus_addr)
 {
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	drm_sg_mem_t *entry = dev->sg;
+	unsigned long pages;
+	int i;
 
-	if ( address ) {
-		DRM(ati_free_pcigart_table)( address );
+	/* we need to support large memory configurations */
+	if ( !entry ) {
+		DRM_ERROR( "no scatter/gather memory!\n" );
+		return 0;
+	}
+
+	if ( bus_addr ) {
+		pci_unmap_single(dev->pdev, bus_addr,
+				 ATI_PCIGART_TABLE_PAGES * PAGE_SIZE,
+				 PCI_DMA_TODEVICE);
+
+		pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
+		        ? entry->pages : ATI_MAX_PCIGART_PAGES;
+
+		for ( i = 0 ; i < pages ; i++ ) {
+			if ( !entry->busaddr[i] ) break;
+			pci_unmap_single(dev->pdev, entry->busaddr[i],
+					 PAGE_SIZE, PCI_DMA_TODEVICE);
+		}
+	}
+
+#endif
+
+	if ( addr ) {
+		DRM(ati_free_pcigart_table)( addr );
 	}
 
-	return 0;
+	return 1;
 }
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 3b282685..8e2ecd16 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -624,6 +624,9 @@ typedef struct drm_sg_mem {
 	void            *virtual;
 	int             pages;
 	struct page     **pagelist;
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	dma_addr_t	*busaddr;
+#endif
 } drm_sg_mem_t;
 
 typedef struct drm_sigdata {
@@ -715,6 +718,7 @@ typedef struct drm_device {
 	drm_agp_head_t    *agp;
 #endif
 #ifdef __alpha__
+	struct pci_dev *pdev;
 #if LINUX_VERSION_CODE < 0x020403
 	struct pci_controler *hose;
 #else
@@ -1018,8 +1022,12 @@ extern int            DRM(sg_free)(struct inode *inode, struct file *filp,
 #endif
 
                                /* 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);
+extern int            DRM(ati_pcigart_init)(drm_device_t *dev,
+					    unsigned long *addr,
+					    dma_addr_t *bus_addr);
+extern int            DRM(ati_pcigart_cleanup)(drm_device_t *dev,
+					       unsigned long addr,
+					       dma_addr_t bus_addr);
 
 #endif /* __KERNEL__ */
 #endif
diff --git a/linux-core/drm_ioctl.c b/linux-core/drm_ioctl.c
index 4712cbd3..e0c87d2d 100644
--- a/linux-core/drm_ioctl.c
+++ b/linux-core/drm_ioctl.c
@@ -114,8 +114,10 @@ int DRM(setunique)(struct inode *inode, struct file *filp,
                 if (*p) break;
  
                 pci_dev = pci_find_slot(b, PCI_DEVFN(d,f));
-                if (pci_dev)
+                if (pci_dev) {
+			dev->pdev = pci_dev;
                         dev->hose = pci_dev->sysdata;
+		}
         } while(0);
 #endif
 
diff --git a/linux-core/drm_scatter.c b/linux-core/drm_scatter.c
index c1c9f7e8..5654c8cb 100644
--- a/linux-core/drm_scatter.c
+++ b/linux-core/drm_scatter.c
@@ -47,12 +47,17 @@ void DRM(sg_cleanup)( drm_sg_mem_t *entry )
 
 	vfree( entry->virtual );
 
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	DRM(free)( entry->busaddr,
+		   entry->pages * sizeof(*entry->busaddr),
+		   DRM_MEM_PAGES );
+#endif
 	DRM(free)( entry->pagelist,
-		  entry->pages * sizeof(*entry->pagelist),
-		  DRM_MEM_PAGES );
+		   entry->pages * sizeof(*entry->pagelist),
+		   DRM_MEM_PAGES );
 	DRM(free)( entry,
-		  sizeof(*entry),
-		  DRM_MEM_SGLISTS );
+		   sizeof(*entry),
+		   DRM_MEM_SGLISTS );
 }
 
 int DRM(sg_alloc)( struct inode *inode, struct file *filp,
@@ -93,16 +98,35 @@ int DRM(sg_alloc)( struct inode *inode, struct file *filp,
 		DRM(free)( entry, sizeof(*entry), DRM_MEM_SGLISTS );
 		return -ENOMEM;
 	}
-	memset(entry->pagelist, 0, pages * sizeof(*entry->pagelist));
+
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	entry->busaddr = DRM(alloc)( pages * sizeof(*entry->busaddr),
+				     DRM_MEM_PAGES );
+	if ( !entry->busaddr ) {
+		DRM(free)( entry->pagelist,
+			   entry->pages * sizeof(*entry->pagelist),
+			   DRM_MEM_PAGES );
+		DRM(free)( entry,
+			   sizeof(*entry),
+			   DRM_MEM_SGLISTS );
+		return -ENOMEM;
+	}
+	memset( (void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr) );
+#endif
 
 	entry->virtual = vmalloc_32( pages << PAGE_SHIFT );
 	if ( !entry->virtual ) {
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+		DRM(free)( entry->busaddr,
+			   entry->pages * sizeof(*entry->busaddr),
+			   DRM_MEM_PAGES );
+#endif
 		DRM(free)( entry->pagelist,
-			  entry->pages * sizeof(*entry->pagelist),
-			  DRM_MEM_PAGES );
+			   entry->pages * sizeof(*entry->pagelist),
+			   DRM_MEM_PAGES );
 		DRM(free)( entry,
-			  sizeof(*entry),
-			  DRM_MEM_SGLISTS );
+			   sizeof(*entry),
+			   DRM_MEM_SGLISTS );
 		return -ENOMEM;
 	}
 
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index d8e77f79..2a5ee146 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -67,6 +67,64 @@ struct page *DRM(vm_nopage)(struct vm_area_struct *vma,
 			    int write_access)
 #endif
 {
+#if defined(__alpha__) && __REALLY_HAVE_AGP
+        drm_file_t *priv  = vma->vm_file->private_data;
+        drm_device_t *dev = priv->dev;
+        drm_map_t *map    = NULL;
+        drm_map_list_t  *r_list;
+        struct list_head *list;
+
+        /*
+         * Find the right map
+         */
+        list_for_each(list, &dev->maplist->head) {
+                r_list = (drm_map_list_t *)list;
+                map = r_list->map;
+                if (!map) continue;
+                if (map->offset == VM_OFFSET(vma)) break;
+        }
+
+        if (map && map->type == _DRM_AGP) {
+                unsigned long offset = address - vma->vm_start;
+                unsigned long baddr = VM_OFFSET(vma) + offset;
+                struct drm_agp_mem *agpmem;
+                struct page *page;
+
+                /*
+                 * Make it a bus-relative address
+                 */
+                baddr -= dev->hose->mem_space->start;
+
+                /*
+                 * It's AGP memory - find the real physical page to map
+                 */
+                for(agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) {
+                        if (agpmem->bound <= baddr &&
+                            agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) 
+                                break;
+                }
+
+                if (!agpmem) {
+                        /*
+                         * Oops - no memory found
+                         */
+                        return NOPAGE_SIGBUS;   /* couldn't find it */
+                }
+
+                /*
+                 * Get the page, inc the use count, and return it
+                 */
+                offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
+		agpmem->memory->memory[offset] &= ~1UL; /* HACK */
+                page = virt_to_page(__va(agpmem->memory->memory[offset]));
+#if 0
+DRM_ERROR("baddr = 0x%lx page = 0x%lx, offset = 0x%lx\n",
+          baddr, __va(agpmem->memory->memory[offset]), offset);
+#endif
+                get_page(page);
+                return page;
+        }
+#endif
 	return NOPAGE_SIGBUS;		/* Disallow mremap */
 }
 
@@ -434,9 +492,20 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
 	}
 
 	switch (map->type) {
+        case _DRM_AGP:
+#if defined(__alpha__)
+                /*
+                 * On Alpha we can't talk to bus dma address from the
+                 * CPU, so for memory of type DRM_AGP, we'll deal with
+                 * sorting out the real physical pages and mappings
+                 * in nopage()
+                 */
+                vma->vm_ops = &DRM(vm_ops);
+                break;
+#endif
+                /* fall through to _DRM_FRAME_BUFFER... */        
 	case _DRM_FRAME_BUFFER:
 	case _DRM_REGISTERS:
-	case _DRM_AGP:
 		if (VM_OFFSET(vma) >= __pa(high_memory)) {
 #if defined(__i386__)
 			if (boot_cpu_data.x86 > 3 && map->type != _DRM_AGP) {
diff --git a/linux/Makefile.kernel b/linux/Makefile.kernel
index 97b507ee..e2630989 100644
--- a/linux/Makefile.kernel
+++ b/linux/Makefile.kernel
@@ -3,9 +3,7 @@
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
 O_TARGET	:= drm.o
-export-objs	:= gamma_drv.o tdfx_drv.o r128_drv.o mga_drv.o i810_drv.o \
-		   ffb_drv.o
-list-multi	:= gamma.o tdfx.o r128.o mga.o i810.o ffb.o
+list-multi	:= gamma.o tdfx.o r128.o mga.o i810.o ffb.o radeon.o
 
 gamma-objs  := gamma_drv.o gamma_dma.o
 tdfx-objs   := tdfx_drv.o
diff --git a/linux/ati_pcigart.h b/linux/ati_pcigart.h
index 93c5148f..99d17ee7 100644
--- a/linux/ati_pcigart.h
+++ b/linux/ati_pcigart.h
@@ -72,8 +72,6 @@ static void DRM(ati_free_pcigart_table)( unsigned long address )
 	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++ ) {
@@ -84,24 +82,45 @@ static void DRM(ati_free_pcigart_table)( unsigned long address )
 	free_pages( address, ATI_PCIGART_TABLE_ORDER );
 }
 
-unsigned long DRM(ati_pcigart_init)( drm_device_t *dev )
+int DRM(ati_pcigart_init)( drm_device_t *dev,
+			   unsigned long *addr,
+			   dma_addr_t *bus_addr)
 {
 	drm_sg_mem_t *entry = dev->sg;
-	unsigned long address;
+	unsigned long address = 0;
 	unsigned long pages;
-	u32 *pci_gart, page_base;
-	int i, j;
+	u32 *pci_gart, page_base, bus_address = 0;
+	int i, j, ret = 0;
 
 	if ( !entry ) {
 		DRM_ERROR( "no scatter/gather memory!\n" );
-		return 0;
+		goto done;
 	}
 
 	address = DRM(ati_alloc_pcigart_table)();
 	if ( !address ) {
 		DRM_ERROR( "cannot allocate PCI GART page!\n" );
-		return 0;
+		goto done;
+	}
+
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	if ( !dev->pdev ) {
+		DRM_ERROR( "PCI device unknown!\n" );
+		goto done;
+	}
+
+	bus_address = pci_map_single(dev->pdev, (void *)address,
+				  ATI_PCIGART_TABLE_PAGES * PAGE_SIZE,
+				  PCI_DMA_TODEVICE);
+	if (bus_address == 0) {
+		DRM_ERROR( "unable to map PCIGART pages!\n" );
+		DRM(ati_free_pcigart_table)( address );
+		address = 0;
+		goto done;
 	}
+#else
+	bus_address = virt_to_bus( (void *)address );
+#endif
 
 	pci_gart = (u32 *)address;
 
@@ -111,28 +130,78 @@ unsigned long DRM(ati_pcigart_init)( drm_device_t *dev )
 	memset( pci_gart, 0, ATI_MAX_PCIGART_PAGES * sizeof(u32) );
 
 	for ( i = 0 ; i < pages ; i++ ) {
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+		/* we need to support large memory configurations */
+		entry->busaddr[i] = pci_map_single(dev->pdev,
+						   entry->pagelist[i]->virtual,
+						   PAGE_SIZE,
+						   PCI_DMA_TODEVICE);
+		if (entry->busaddr[i] == 0) {
+			DRM_ERROR( "unable to map PCIGART pages!\n" );
+			DRM(ati_pcigart_cleanup)( dev, address, bus_address );
+			address = 0;
+			bus_address = 0;
+			goto done;
+		}
+		page_base = (u32) entry->busaddr[i];
+#else
 		page_base = virt_to_bus( entry->pagelist[i]->virtual );
+#endif
 		for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
 			*pci_gart++ = cpu_to_le32( page_base );
 			page_base += ATI_PCIGART_PAGE_SIZE;
 		}
 	}
 
+	ret = 1;
+
 #if __i386__
 	asm volatile ( "wbinvd" ::: "memory" );
 #else
 	mb();
 #endif
 
-	return address;
+done:
+	*addr = address;
+	*bus_addr = bus_address;
+	return ret;
 }
 
-int DRM(ati_pcigart_cleanup)( unsigned long address )
+int DRM(ati_pcigart_cleanup)( drm_device_t *dev,
+			      unsigned long addr,
+			      dma_addr_t bus_addr)
 {
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	drm_sg_mem_t *entry = dev->sg;
+	unsigned long pages;
+	int i;
 
-	if ( address ) {
-		DRM(ati_free_pcigart_table)( address );
+	/* we need to support large memory configurations */
+	if ( !entry ) {
+		DRM_ERROR( "no scatter/gather memory!\n" );
+		return 0;
+	}
+
+	if ( bus_addr ) {
+		pci_unmap_single(dev->pdev, bus_addr,
+				 ATI_PCIGART_TABLE_PAGES * PAGE_SIZE,
+				 PCI_DMA_TODEVICE);
+
+		pages = ( entry->pages <= ATI_MAX_PCIGART_PAGES )
+		        ? entry->pages : ATI_MAX_PCIGART_PAGES;
+
+		for ( i = 0 ; i < pages ; i++ ) {
+			if ( !entry->busaddr[i] ) break;
+			pci_unmap_single(dev->pdev, entry->busaddr[i],
+					 PAGE_SIZE, PCI_DMA_TODEVICE);
+		}
+	}
+
+#endif
+
+	if ( addr ) {
+		DRM(ati_free_pcigart_table)( addr );
 	}
 
-	return 0;
+	return 1;
 }
diff --git a/linux/drmP.h b/linux/drmP.h
index 3b282685..8e2ecd16 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -624,6 +624,9 @@ typedef struct drm_sg_mem {
 	void            *virtual;
 	int             pages;
 	struct page     **pagelist;
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	dma_addr_t	*busaddr;
+#endif
 } drm_sg_mem_t;
 
 typedef struct drm_sigdata {
@@ -715,6 +718,7 @@ typedef struct drm_device {
 	drm_agp_head_t    *agp;
 #endif
 #ifdef __alpha__
+	struct pci_dev *pdev;
 #if LINUX_VERSION_CODE < 0x020403
 	struct pci_controler *hose;
 #else
@@ -1018,8 +1022,12 @@ extern int            DRM(sg_free)(struct inode *inode, struct file *filp,
 #endif
 
                                /* 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);
+extern int            DRM(ati_pcigart_init)(drm_device_t *dev,
+					    unsigned long *addr,
+					    dma_addr_t *bus_addr);
+extern int            DRM(ati_pcigart_cleanup)(drm_device_t *dev,
+					       unsigned long addr,
+					       dma_addr_t bus_addr);
 
 #endif /* __KERNEL__ */
 #endif
diff --git a/linux/drm_ioctl.h b/linux/drm_ioctl.h
index 4712cbd3..e0c87d2d 100644
--- a/linux/drm_ioctl.h
+++ b/linux/drm_ioctl.h
@@ -114,8 +114,10 @@ int DRM(setunique)(struct inode *inode, struct file *filp,
                 if (*p) break;
  
                 pci_dev = pci_find_slot(b, PCI_DEVFN(d,f));
-                if (pci_dev)
+                if (pci_dev) {
+			dev->pdev = pci_dev;
                         dev->hose = pci_dev->sysdata;
+		}
         } while(0);
 #endif
 
diff --git a/linux/drm_scatter.h b/linux/drm_scatter.h
index c1c9f7e8..5654c8cb 100644
--- a/linux/drm_scatter.h
+++ b/linux/drm_scatter.h
@@ -47,12 +47,17 @@ void DRM(sg_cleanup)( drm_sg_mem_t *entry )
 
 	vfree( entry->virtual );
 
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	DRM(free)( entry->busaddr,
+		   entry->pages * sizeof(*entry->busaddr),
+		   DRM_MEM_PAGES );
+#endif
 	DRM(free)( entry->pagelist,
-		  entry->pages * sizeof(*entry->pagelist),
-		  DRM_MEM_PAGES );
+		   entry->pages * sizeof(*entry->pagelist),
+		   DRM_MEM_PAGES );
 	DRM(free)( entry,
-		  sizeof(*entry),
-		  DRM_MEM_SGLISTS );
+		   sizeof(*entry),
+		   DRM_MEM_SGLISTS );
 }
 
 int DRM(sg_alloc)( struct inode *inode, struct file *filp,
@@ -93,16 +98,35 @@ int DRM(sg_alloc)( struct inode *inode, struct file *filp,
 		DRM(free)( entry, sizeof(*entry), DRM_MEM_SGLISTS );
 		return -ENOMEM;
 	}
-	memset(entry->pagelist, 0, pages * sizeof(*entry->pagelist));
+
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+	entry->busaddr = DRM(alloc)( pages * sizeof(*entry->busaddr),
+				     DRM_MEM_PAGES );
+	if ( !entry->busaddr ) {
+		DRM(free)( entry->pagelist,
+			   entry->pages * sizeof(*entry->pagelist),
+			   DRM_MEM_PAGES );
+		DRM(free)( entry,
+			   sizeof(*entry),
+			   DRM_MEM_SGLISTS );
+		return -ENOMEM;
+	}
+	memset( (void *)entry->busaddr, 0, pages * sizeof(*entry->busaddr) );
+#endif
 
 	entry->virtual = vmalloc_32( pages << PAGE_SHIFT );
 	if ( !entry->virtual ) {
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+		DRM(free)( entry->busaddr,
+			   entry->pages * sizeof(*entry->busaddr),
+			   DRM_MEM_PAGES );
+#endif
 		DRM(free)( entry->pagelist,
-			  entry->pages * sizeof(*entry->pagelist),
-			  DRM_MEM_PAGES );
+			   entry->pages * sizeof(*entry->pagelist),
+			   DRM_MEM_PAGES );
 		DRM(free)( entry,
-			  sizeof(*entry),
-			  DRM_MEM_SGLISTS );
+			   sizeof(*entry),
+			   DRM_MEM_SGLISTS );
 		return -ENOMEM;
 	}
 
diff --git a/linux/drm_vm.h b/linux/drm_vm.h
index d8e77f79..2a5ee146 100644
--- a/linux/drm_vm.h
+++ b/linux/drm_vm.h
@@ -67,6 +67,64 @@ struct page *DRM(vm_nopage)(struct vm_area_struct *vma,
 			    int write_access)
 #endif
 {
+#if defined(__alpha__) && __REALLY_HAVE_AGP
+        drm_file_t *priv  = vma->vm_file->private_data;
+        drm_device_t *dev = priv->dev;
+        drm_map_t *map    = NULL;
+        drm_map_list_t  *r_list;
+        struct list_head *list;
+
+        /*
+         * Find the right map
+         */
+        list_for_each(list, &dev->maplist->head) {
+                r_list = (drm_map_list_t *)list;
+                map = r_list->map;
+                if (!map) continue;
+                if (map->offset == VM_OFFSET(vma)) break;
+        }
+
+        if (map && map->type == _DRM_AGP) {
+                unsigned long offset = address - vma->vm_start;
+                unsigned long baddr = VM_OFFSET(vma) + offset;
+                struct drm_agp_mem *agpmem;
+                struct page *page;
+
+                /*
+                 * Make it a bus-relative address
+                 */
+                baddr -= dev->hose->mem_space->start;
+
+                /*
+                 * It's AGP memory - find the real physical page to map
+                 */
+                for(agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) {
+                        if (agpmem->bound <= baddr &&
+                            agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) 
+                                break;
+                }
+
+                if (!agpmem) {
+                        /*
+                         * Oops - no memory found
+                         */
+                        return NOPAGE_SIGBUS;   /* couldn't find it */
+                }
+
+                /*
+                 * Get the page, inc the use count, and return it
+                 */
+                offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
+		agpmem->memory->memory[offset] &= ~1UL; /* HACK */
+                page = virt_to_page(__va(agpmem->memory->memory[offset]));
+#if 0
+DRM_ERROR("baddr = 0x%lx page = 0x%lx, offset = 0x%lx\n",
+          baddr, __va(agpmem->memory->memory[offset]), offset);
+#endif
+                get_page(page);
+                return page;
+        }
+#endif
 	return NOPAGE_SIGBUS;		/* Disallow mremap */
 }
 
@@ -434,9 +492,20 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
 	}
 
 	switch (map->type) {
+        case _DRM_AGP:
+#if defined(__alpha__)
+                /*
+                 * On Alpha we can't talk to bus dma address from the
+                 * CPU, so for memory of type DRM_AGP, we'll deal with
+                 * sorting out the real physical pages and mappings
+                 * in nopage()
+                 */
+                vma->vm_ops = &DRM(vm_ops);
+                break;
+#endif
+                /* fall through to _DRM_FRAME_BUFFER... */        
 	case _DRM_FRAME_BUFFER:
 	case _DRM_REGISTERS:
-	case _DRM_AGP:
 		if (VM_OFFSET(vma) >= __pa(high_memory)) {
 #if defined(__i386__)
 			if (boot_cpu_data.x86 > 3 && map->type != _DRM_AGP) {
diff --git a/linux/mga_drv.h b/linux/mga_drv.h
index bb3d21b4..ba2602e7 100644
--- a/linux/mga_drv.h
+++ b/linux/mga_drv.h
@@ -145,14 +145,28 @@ extern int mga_warp_init( drm_mga_private_t *dev_priv );
 #define mga_flush_write_combine()	mb()
 
 
-#define MGA_BASE( reg )		((u32)(dev_priv->mmio->handle))
+#define MGA_BASE( reg )		((unsigned long)(dev_priv->mmio->handle))
 #define MGA_ADDR( reg )		(MGA_BASE(reg) + reg)
 
 #define MGA_DEREF( reg )	*(volatile u32 *)MGA_ADDR( reg )
+#define MGA_DEREF8( reg )	*(volatile u8 *)MGA_ADDR( reg )
+
+#ifdef __alpha__
+#define MGA_READ( reg )		(_MGA_READ((u32 *)MGA_ADDR(reg)))
+#define MGA_WRITE( reg, val )	do { wmb(); MGA_DEREF( reg ) = val; } while (0)
+#define MGA_WRITE8( reg, val )  do { wmb(); MGA_DEREF8( reg ) = val; } while (0)
+
+static inline u32 _MGA_READ(u32 *addr)
+{
+	mb();
+	return *(volatile u32 *)addr;
+}
+
+#else
 #define MGA_READ( reg )		MGA_DEREF( reg )
 #define MGA_WRITE( reg, val )	do { MGA_DEREF( reg ) = val; } while (0)
-#define MGA_DEREF8( reg )	*(volatile u8 *)MGA_ADDR( reg )
 #define MGA_WRITE8( reg, val )  do { MGA_DEREF8( reg ) = val; } while (0)
+#endif
 
 #define DWGREG0 	0x1c00
 #define DWGREG0_END 	0x1dff
diff --git a/linux/r128_cce.c b/linux/r128_cce.c
index d04473b9..24b6de8d 100644
--- a/linux/r128_cce.c
+++ b/linux/r128_cce.c
@@ -350,12 +350,20 @@ static void r128_cce_init_ring_buffer( drm_device_t *dev,
 		tmp_ofs = dev_priv->ring_rptr->offset - dev->sg->handle;
 		page_ofs = tmp_ofs >> PAGE_SHIFT;
 
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+		R128_WRITE( R128_PM4_BUFFER_DL_RPTR_ADDR,
+     			    entry->busaddr[page_ofs]);
+		DRM_DEBUG( "ring rptr: offset=0x%08x handle=0x%08lx\n",
+			   entry->busaddr[page_ofs],
+     			   entry->handle + tmp_ofs );
+#else
 		R128_WRITE( R128_PM4_BUFFER_DL_RPTR_ADDR,
 			    virt_to_bus(entry->pagelist[page_ofs]->virtual));
 
 		DRM_DEBUG( "ring rptr: offset=0x%08lx handle=0x%08lx\n",
 			   virt_to_bus(entry->pagelist[page_ofs]->virtual),
 			   entry->handle + tmp_ofs );
+#endif
 	}
 
 	/* Set watermark control */
@@ -599,15 +607,14 @@ static int r128_do_init_cce( drm_device_t *dev, drm_r128_init_t *init )
 		    dev_priv->sarea_priv->last_dispatch );
 
 	if ( dev_priv->is_pci ) {
-		dev_priv->phys_pci_gart = DRM(ati_pcigart_init)( dev );
-		if ( !dev_priv->phys_pci_gart ) {
+		if (!DRM(ati_pcigart_init)( dev, &dev_priv->phys_pci_gart,
+     					    &dev_priv->bus_pci_gart) ) {
 			DRM_ERROR( "failed to init PCI GART!\n" );
 			dev->dev_private = (void *)dev_priv;
 			r128_do_cleanup_cce( dev );
 			return -ENOMEM;
 		}
-		R128_WRITE( R128_PCI_GART_PAGE,
-			    virt_to_bus( (void *)dev_priv->phys_pci_gart ) );
+		R128_WRITE( R128_PCI_GART_PAGE, dev_priv->bus_pci_gart );
 	}
 
 	r128_cce_init_ring_buffer( dev, dev_priv );
@@ -629,6 +636,11 @@ int r128_do_cleanup_cce( drm_device_t *dev )
 			DRM_IOREMAPFREE( dev_priv->cce_ring );
 			DRM_IOREMAPFREE( dev_priv->ring_rptr );
 			DRM_IOREMAPFREE( dev_priv->buffers );
+		} else {
+			if (!DRM(ati_pcigart_cleanup)( dev,
+						dev_priv->phys_pci_gart,
+						dev_priv->bus_pci_gart ))
+				DRM_ERROR( "failed to cleanup PCI GART!\n" );
 		}
 
 		DRM(free)( dev->dev_private, sizeof(drm_r128_private_t),
diff --git a/linux/r128_drv.h b/linux/r128_drv.h
index 0ef94e45..4b46db08 100644
--- a/linux/r128_drv.h
+++ b/linux/r128_drv.h
@@ -72,6 +72,7 @@ typedef struct drm_r128_private {
 	int usec_timeout;
 	int is_pci;
 	unsigned long phys_pci_gart;
+	dma_addr_t bus_pci_gart;
 	unsigned long cce_buffers_offset;
 
 	atomic_t idle_count;
diff --git a/linux/radeon_cp.c b/linux/radeon_cp.c
index a7127b2b..51596c7b 100644
--- a/linux/radeon_cp.c
+++ b/linux/radeon_cp.c
@@ -622,13 +622,20 @@ static void radeon_cp_init_ring_buffer( drm_device_t *dev,
 
 		tmp_ofs = dev_priv->ring_rptr->offset - dev->sg->handle;
 		page_ofs = tmp_ofs >> PAGE_SHIFT;
-
+#if defined(__alpha__) && (LINUX_VERSION_CODE >= 0x020400)
+		RADEON_WRITE( RADEON_CP_RB_RPTR_ADDR,
+			     entry->busaddr[page_ofs]);
+		DRM_DEBUG( "ring rptr: offset=0x%08x handle=0x%08lx\n",
+			   entry->busaddr[page_ofs],
+			   entry->handle + tmp_ofs );
+#else
 		RADEON_WRITE( RADEON_CP_RB_RPTR_ADDR,
 			      virt_to_bus(entry->pagelist[page_ofs]->virtual));
 
 		DRM_DEBUG( "ring rptr: offset=0x%08lx handle=0x%08lx\n",
 			   virt_to_bus(entry->pagelist[page_ofs]->virtual),
 			   entry->handle + tmp_ofs );
+#endif
 	}
 
 	/* Set ring buffer size */
@@ -929,8 +936,8 @@ static int radeon_do_init_cp( drm_device_t *dev, drm_radeon_init_t *init )
 		      dev_priv->sarea_priv->last_clear );
 
 	if ( dev_priv->is_pci ) {
-		dev_priv->phys_pci_gart = DRM(ati_pcigart_init)( dev );
-		if ( !dev_priv->phys_pci_gart ) {
+		if (!DRM(ati_pcigart_init)( dev, &dev_priv->phys_pci_gart,
+					    &dev_priv->bus_pci_gart)) {
 			DRM_ERROR( "failed to init PCI GART!\n" );
 			dev->dev_private = (void *)dev_priv;
 			radeon_do_cleanup_cp(dev);
@@ -944,8 +951,7 @@ static int radeon_do_init_cp( drm_device_t *dev, drm_radeon_init_t *init )
 
 		/* set PCI GART page-table base address
 		 */
-		RADEON_WRITE( RADEON_AIC_PT_BASE,
-			      virt_to_bus( (void *)dev_priv->phys_pci_gart ) );
+		RADEON_WRITE( RADEON_AIC_PT_BASE, dev_priv->bus_pci_gart );
 
 		/* set address range for PCI address translate
 		 */
@@ -990,6 +996,11 @@ int radeon_do_cleanup_cp( drm_device_t *dev )
 			DRM_IOREMAPFREE( dev_priv->cp_ring );
 			DRM_IOREMAPFREE( dev_priv->ring_rptr );
 			DRM_IOREMAPFREE( dev_priv->buffers );
+		} else {
+			if (!DRM(ati_pcigart_cleanup)( dev,
+						dev_priv->phys_pci_gart,
+						dev_priv->bus_pci_gart ))
+				DRM_ERROR( "failed to cleanup PCI GART!\n" );
 		}
 
 		DRM(free)( dev->dev_private, sizeof(drm_radeon_private_t),
diff --git a/linux/radeon_drv.h b/linux/radeon_drv.h
index 4217beee..5afea7d1 100644
--- a/linux/radeon_drv.h
+++ b/linux/radeon_drv.h
@@ -84,6 +84,7 @@ typedef struct drm_radeon_private {
 	int usec_timeout;
 	int is_pci;
 	unsigned long phys_pci_gart;
+	dma_addr_t bus_pci_gart;
 
 	atomic_t idle_count;