Merged via-1-2-0

10 files changed, 1576 insertions, 0 deletions

diff --git a/shared/via.h b/shared/via.h
new file mode 100644
index 00000000..f7fabd7e
--- /dev/null
+++ b/shared/via.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#ifndef __VIA_H__
+#define __VIA_H__
+
+
+#define DRM(x) viadrv_##x
+
+
+#define __HAVE_AGP		1
+#define __MUST_HAVE_AGP		0
+#define __HAVE_MTRR		1
+#define __HAVE_CTX_BITMAP	1
+
+/* BEAM: Have enabled DMA,DMA_IRQ and VBL_IRQ needed to do this to get standard
+ * support for VBL_IRQ.
+ */
+
+#define __HAVE_IRQ              1
+#define __HAVE_SHARED_IRQ	1
+#define __HAVE_VBL_IRQ		1
+
+
+
+#define DRIVER_AGP_BUFFERS_MAP( dev )				\
+    ((drm_via_private_t *)((dev)->dev_private))->buffers
+
+extern int via_init_context(int context);
+extern int via_final_context(int context);
+
+#define DRIVER_CTX_CTOR via_init_context
+#define DRIVER_CTX_DTOR via_final_context
+
+#define DRIVER_PCI_IDS				\
+    {0x1106, 0x3122, 0, "Via CLE3122"},		\
+    {0x1106, 0x3022, 0, "Via CLE3022"},		\
+    {0x1106, 0x3205, 0, "Via VT3205"},		\
+    {0x1106, 0x7205, 0, "Via VT7205"},		\
+    {0x1106, 0x3204, 0, "Via VT3204"},		\
+    {0x1106, 0x7204, 0, "Via VT7204"},		\
+	    {0, 0, 0, NULL}
+
+#endif
diff --git a/shared/via_drm.h b/shared/via_drm.h
new file mode 100644
index 00000000..da80aa92
--- /dev/null
+++ b/shared/via_drm.h
@@ -0,0 +1,185 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#ifndef _VIA_DRM_H_
+#define _VIA_DRM_H_
+
+/* WARNING: These defines must be the same as what the Xserver uses.
+ * if you change them, you must change the defines in the Xserver.
+ */
+
+#ifndef _VIA_DEFINES_
+#define _VIA_DEFINES_
+
+#define VIA_DMA_BUF_ORDER		12
+#define VIA_DMA_BUF_SZ 		        (1 << VIA_DMA_BUF_ORDER)
+#define VIA_DMA_BUF_NR 			256
+#define VIA_NR_SAREA_CLIPRECTS 		8
+#define VIA_NR_XVMC_LOCKS               2
+#define VIA_MAX_CACHELINE_SIZE          64
+#define XVMCLOCKPTR(saPriv,lockNo)					\
+        ((volatile int *)(((((unsigned long) (saPriv)->XvMCLockArea) +	\
+                            (VIA_MAX_CACHELINE_SIZE - 1)) &             \
+                           ~(VIA_MAX_CACHELINE_SIZE - 1)) +             \
+                          VIA_MAX_CACHELINE_SIZE*(lockNo)))
+
+/* Each region is a minimum of 64k, and there are at most 64 of them.
+ */
+#define VIA_NR_TEX_REGIONS 64
+#define VIA_LOG_MIN_TEX_REGION_SIZE 16
+#endif
+
+#define VIA_UPLOAD_TEX0IMAGE  0x1 /* handled clientside */
+#define VIA_UPLOAD_TEX1IMAGE  0x2 /* handled clientside */
+#define VIA_UPLOAD_CTX        0x4
+#define VIA_UPLOAD_BUFFERS    0x8
+#define VIA_UPLOAD_TEX0       0x10
+#define VIA_UPLOAD_TEX1       0x20
+#define VIA_UPLOAD_CLIPRECTS  0x40
+#define VIA_UPLOAD_ALL        0xff
+
+/* VIA specific ioctls */
+#define DRM_IOCTL_VIA_ALLOCMEM	DRM_IOWR(0x40, drm_via_mem_t)
+#define DRM_IOCTL_VIA_FREEMEM	DRM_IOW(0x41, drm_via_mem_t)
+#define DRM_IOCTL_VIA_AGP_INIT	DRM_IOWR(0x42, drm_via_agp_t)
+#define DRM_IOCTL_VIA_FB_INIT	DRM_IOWR(0x43, drm_via_fb_t)
+#define DRM_IOCTL_VIA_MAP_INIT	DRM_IOWR(0x44, drm_via_init_t)
+#define DRM_IOCTL_VIA_DEC_FUTEX DRM_IOW(0x45, drm_via_futex_t)
+
+/* Indices into buf.Setup where various bits of state are mirrored per
+ * context and per buffer.  These can be fired at the card as a unit,
+ * or in a piecewise fashion as required.
+ */
+ 
+#define VIA_TEX_SETUP_SIZE 8
+
+/* Flags for clear ioctl
+ */
+#define VIA_FRONT   0x1
+#define VIA_BACK    0x2
+#define VIA_DEPTH   0x4
+#define VIA_STENCIL 0x8
+#define VIDEO 0
+#define AGP 1
+typedef struct {
+        unsigned int offset;
+        unsigned int size;
+} drm_via_agp_t;    
+
+typedef struct {
+        unsigned int offset;
+        unsigned int size;
+} drm_via_fb_t;    
+
+typedef struct {
+        unsigned int context;
+        unsigned int type;
+        unsigned int size;
+        unsigned long index;
+        unsigned long offset;
+} drm_via_mem_t;    
+
+typedef struct _drm_via_init {
+        enum {
+                VIA_INIT_MAP = 0x01,
+                VIA_CLEANUP_MAP = 0x02
+        } func;
+
+        unsigned long sarea_priv_offset;
+        unsigned long fb_offset;
+        unsigned long mmio_offset;
+        unsigned long agpAddr;
+} drm_via_init_t;
+
+typedef struct _drm_via_futex {
+        enum {
+                VIA_FUTEX_WAIT = 0x00,
+                VIA_FUTEX_WAKE = 0X01
+        }fut;
+        unsigned int op;
+        unsigned int ms;
+        unsigned int lock;
+        unsigned int val;
+} drm_via_futex_t;
+
+/* Warning: If you change the SAREA structure you must change the Xserver
+ * structure as well */
+
+typedef struct _drm_via_tex_region {
+        unsigned char next, prev;	/* indices to form a circular LRU  */
+        unsigned char inUse;	/* owned by a client, or free? */
+        int age;			/* tracked by clients to update local LRU's */
+} drm_via_tex_region_t;
+
+typedef struct _drm_via_sarea {
+        unsigned int dirty;
+        unsigned int nbox;
+        drm_clip_rect_t boxes[VIA_NR_SAREA_CLIPRECTS];   
+        drm_via_tex_region_t texList[VIA_NR_TEX_REGIONS + 1]; 
+        int texAge;			/* last time texture was uploaded */
+        int ctxOwner;		/* last context to upload state */
+        int vertexPrim;
+
+        /*
+         * Below is for XvMC.
+         */
+
+        unsigned int XvMCSubPicOn;         /* Subpicture displaying flag */
+        unsigned int XvMCDisplaying;       /* Surface displaying flag */
+        unsigned int XvMCCtxNoGrabbed;     /* Last context to hold decoder */
+
+        /*
+         * We want the lock integers alone on, and aligned to, a cache line.
+         * Therefore this somewhat strange construct.
+         */
+
+        char XvMCLockArea[VIA_MAX_CACHELINE_SIZE * (VIA_NR_XVMC_LOCKS + 1)];
+
+} drm_via_sarea_t;
+
+
+typedef struct _drm_via_flush_agp {
+        unsigned int offset;
+        unsigned int size;
+        unsigned int index;		
+        int discard;	/* client is finished with the buffer? */
+} drm_via_flush_agp_t;
+
+typedef struct _drm_via_flush_sys {
+        unsigned int offset;
+        unsigned int size;
+        unsigned long index;		
+        int discard;	/* client is finished with the buffer? */
+} drm_via_flush_sys_t;
+
+#ifdef __KERNEL__
+
+int via_fb_init( DRM_IOCTL_ARGS );		
+int via_mem_alloc( DRM_IOCTL_ARGS );				
+int via_mem_free( DRM_IOCTL_ARGS );		
+int via_agp_init( DRM_IOCTL_ARGS );				
+int via_map_init( DRM_IOCTL_ARGS );				
+int via_decoder_futex( DRM_IOCTL_ARGS ); 
+
+#endif
+#endif /* _VIA_DRM_H_ */
diff --git a/shared/via_drv.c b/shared/via_drv.c
new file mode 100644
index 00000000..65ea55a1
--- /dev/null
+++ b/shared/via_drv.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#include <linux/config.h>
+#include "via.h"
+#include "drmP.h"
+#include "via_drm.h"
+#include "via_drv.h"
+
+#define DRIVER_AUTHOR	"VIA"
+
+#define DRIVER_NAME		"via"
+#define DRIVER_DESC		"VIA Unichrome"
+#define DRIVER_DATE		"20040317"
+
+#define DRIVER_MAJOR		1
+#define DRIVER_MINOR		2
+#define DRIVER_PATCHLEVEL	0
+
+
+#define DRIVER_IOCTLS							\
+        [DRM_IOCTL_NR(DRM_IOCTL_VIA_ALLOCMEM)]  = { via_mem_alloc,  1, 0 }, \
+        [DRM_IOCTL_NR(DRM_IOCTL_VIA_FREEMEM)]   = { via_mem_free,   1, 0 }, \
+        [DRM_IOCTL_NR(DRM_IOCTL_VIA_AGP_INIT)]   = { via_agp_init,  1, 0 }, \
+        [DRM_IOCTL_NR(DRM_IOCTL_VIA_FB_INIT)]   = { via_fb_init,    1, 0 }, \
+        [DRM_IOCTL_NR(DRM_IOCTL_VIA_MAP_INIT)]   = { via_map_init,  1, 0 }, \
+        [DRM_IOCTL_NR(DRM_IOCTL_VIA_DEC_FUTEX)] = { via_decoder_futex, 1, 0}
+
+
+#define __HAVE_COUNTERS		0
+
+#include "drm_auth.h"
+#include "drm_agpsupport.h"
+#include "drm_bufs.h"
+#include "drm_context.h"
+#include "drm_dma.h"
+#include "drm_irq.h"
+#include "drm_drawable.h"
+#include "drm_drv.h"
+#include "drm_fops.h"
+#include "drm_init.h"
+#include "drm_ioctl.h"
+#include "drm_lock.h"
+#include "drm_memory.h"
+#include "drm_proc.h"
+#include "drm_vm.h"
+#include "drm_stub.h"
diff --git a/shared/via_drv.h b/shared/via_drv.h
new file mode 100644
index 00000000..1eafc95f
--- /dev/null
+++ b/shared/via_drv.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#ifndef _VIA_DRV_H_
+#define _VIA_DRV_H_
+
+#include "via_drm.h"
+
+
+typedef struct drm_via_private {
+        drm_via_sarea_t *sarea_priv;
+        drm_map_t *sarea;
+        drm_map_t *fb;
+        drm_map_t *mmio;
+        unsigned long agpAddr;
+        drm_map_t *buffers;
+        wait_queue_head_t decoder_queue[VIA_NR_XVMC_LOCKS];
+} drm_via_private_t;
+
+ 
+/* VIA MMIO register access */
+#define VIA_BASE ((dev_priv->mmio))
+
+#define VIA_READ(reg)		DRM_READ32(VIA_BASE, reg)
+#define VIA_WRITE(reg,val)	DRM_WRITE32(VIA_BASE, reg, val)
+#define VIA_READ8(reg)		DRM_READ8(VIA_BASE, reg)
+#define VIA_WRITE8(reg,val)	DRM_WRITE8(VIA_BASE, reg, val)
+
+ 
+extern int via_do_init_map(drm_device_t *dev, drm_via_init_t *init);
+extern int via_do_cleanup_map(drm_device_t *dev);
+extern int via_map_init(struct inode *inode, struct file *filp,
+			unsigned int cmd, unsigned long arg);
+
+#endif
diff --git a/shared/via_ds.c b/shared/via_ds.c
new file mode 100644
index 00000000..7fbd27aa
--- /dev/null
+++ b/shared/via_ds.c
@@ -0,0 +1,400 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
+ *
+ * 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#define __NO_VERSION__
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <asm/io.h>
+#include <linux/pci.h>
+
+#include "via_ds.h"
+extern unsigned int VIA_DEBUG;
+
+set_t *via_setInit(void)
+{
+        int i;
+        set_t *set;
+        set = (set_t *)DRM_MALLOC(sizeof(set_t));
+        for (i = 0; i < SET_SIZE; i++) {
+                set->list[i].free_next = i+1;    
+                set->list[i].alloc_next = -1;
+        }    
+        set->list[SET_SIZE-1].free_next = -1;
+        set->free = 0;
+        set->alloc = -1;
+        set->trace = -1;
+        return set;
+}
+
+int via_setAdd(set_t *set, ITEM_TYPE item)
+{
+        int free = set->free;
+        if (free != -1) {
+                set->list[free].val = item;
+                set->free = set->list[free].free_next;
+        }
+        else {
+                return 0;
+        }
+        set->list[free].alloc_next = set->alloc;
+        set->alloc = free;  
+        set->list[free].free_next = -1;  
+        return 1;
+}
+
+int via_setDel(set_t *set, ITEM_TYPE item)
+{
+        int alloc = set->alloc;
+        int prev = -1;  
+  
+        while (alloc != -1) {
+                if (set->list[alloc].val == item) {
+                        if (prev != -1)      
+                                set->list[prev].alloc_next = set->list[alloc].alloc_next; 
+                        else
+                                set->alloc = set->list[alloc].alloc_next;
+                        break;
+                }
+                prev = alloc;
+                alloc = set->list[alloc].alloc_next;      
+        }
+
+        if (alloc == -1)
+                return 0;
+  
+        set->list[alloc].free_next = set->free;
+        set->free = alloc;
+        set->list[alloc].alloc_next = -1;   
+
+        return 1;
+}
+
+/* setFirst -> setAdd -> setNext is wrong */
+
+int via_setFirst(set_t *set, ITEM_TYPE *item)
+{
+        if (set->alloc == -1)
+                return 0;
+
+        *item = set->list[set->alloc].val;
+        set->trace = set->list[set->alloc].alloc_next; 
+
+	
+        return 1;
+}
+
+int via_setNext(set_t *set, ITEM_TYPE *item)
+{
+        if (set->trace == -1)
+                return 0;
+  
+        *item = set->list[set->trace].val;
+        set->trace = set->list[set->trace].alloc_next;      
+
+        return 1;
+}
+
+int via_setDestroy(set_t *set)
+{
+        DRM_FREE(set, sizeof(set_t));
+
+        return 1;
+}
+
+#define ISFREE(bptr) ((bptr)->free)
+
+#define PRINTF(fmt, arg...) do{}while(0)
+#define fprintf(fmt, arg...) do{}while(0)
+
+static void *calloc(size_t nmemb, size_t size)
+{
+        void *addr;
+        addr = kmalloc(nmemb*size, GFP_KERNEL);
+        memset(addr, 0, nmemb*size);
+        return addr;
+}
+#define free(n) kfree(n)
+           
+void via_mmDumpMemInfo( memHeap_t *heap )
+{
+        TMemBlock *p;
+
+        PRINTF ("Memory heap %p:\n", heap);
+    
+        if (heap == 0)
+                PRINTF ("  heap == 0\n");
+        else {
+                p = (TMemBlock *)heap;
+	
+                while (p) {
+                        PRINTF ("  Offset:%08x, Size:%08x, %c%c\n",p->ofs,p->size,
+                                p->free ? '.':'U',
+                                p->reserved ? 'R':'.');
+                        p = p->next;
+                }
+        }
+    
+        PRINTF ("End of memory blocks\n");
+}
+
+memHeap_t *via_mmInit(int ofs,
+		      int size)
+{
+        PMemBlock blocks;
+  
+        if (size <= 0)
+                return 0;
+
+      
+        blocks = (TMemBlock *)calloc(1,sizeof(TMemBlock));
+   
+        if (blocks) {
+                blocks->ofs = ofs;
+                blocks->size = size;
+                blocks->free = 1;
+                return (memHeap_t *)blocks;
+        } else
+                return 0;
+}
+
+memHeap_t *via_mmAddRange(memHeap_t *heap,
+			  int ofs,
+			  int size)
+{
+        PMemBlock blocks;
+        blocks = (TMemBlock *) calloc(2,sizeof(TMemBlock));
+    
+        if (blocks) {
+                blocks[0].size = size;
+                blocks[0].free = 1;
+                blocks[0].ofs = ofs;
+                blocks[0].next = &blocks[1];
+
+                /* Discontinuity - stops JoinBlock from trying to join non-adjacent
+                 * ranges.
+                 */
+                blocks[1].size = 0;
+                blocks[1].free = 0;
+                blocks[1].ofs = ofs+size;
+                blocks[1].next = (PMemBlock) heap;      
+                return (memHeap_t *)blocks;
+        } 
+        else
+                return heap;
+}
+
+static TMemBlock* SliceBlock(TMemBlock *p, 
+			     int startofs, int size, 
+			     int reserved, int alignment)
+{
+        TMemBlock *newblock;
+
+        /* break left */
+        if (startofs > p->ofs) {
+                newblock = (TMemBlock*)calloc(1,sizeof(TMemBlock));
+                newblock->ofs = startofs;
+                newblock->size = p->size - (startofs - p->ofs);
+                newblock->free = 1;
+                newblock->next = p->next;
+                p->size -= newblock->size;
+                p->next = newblock;
+                p = newblock;
+        }
+
+        /* break right */
+        if (size < p->size) {
+                newblock = (TMemBlock*) calloc(1,sizeof(TMemBlock));
+                newblock->ofs = startofs + size;
+                newblock->size = p->size - size;
+                newblock->free = 1;
+                newblock->next = p->next;
+                p->size = size;
+                p->next = newblock;
+        }
+
+        /* p = middle block */
+        p->align = alignment;
+        p->free = 0;
+        p->reserved = reserved;
+        return p;
+}
+
+PMemBlock via_mmAllocMem(memHeap_t *heap, int size, int align2, int startSearch)
+{
+        int mask,startofs,endofs;
+        TMemBlock *p;
+
+        if (!heap || align2 < 0 || size <= 0)
+                return NULL;
+    
+        mask = (1 << align2)-1;
+        startofs = 0;
+        p = (TMemBlock *)heap;
+    
+        while (p) {
+                if (ISFREE(p)) {
+                        startofs = (p->ofs + mask) & ~mask;
+    	
+                        if ( startofs < startSearch )
+                                startofs = startSearch;
+        
+                        endofs = startofs+size;
+        
+                        if (endofs <= (p->ofs+p->size))
+                                break;
+                }
+	
+                p = p->next;
+        }
+    
+        if (!p)
+                return NULL;
+    
+        p = SliceBlock(p,startofs,size,0,mask+1);
+        p->heap = heap;
+    
+        return p;
+}
+
+static __inline__ int Join2Blocks(TMemBlock *p)
+{
+        if (p->free && p->next && p->next->free) {
+                TMemBlock *q = p->next;
+                p->size += q->size;
+                p->next = q->next;
+                free(q);
+	
+                return 1;
+        }
+    
+        return 0;
+}
+
+int via_mmFreeMem(PMemBlock b)
+{
+        TMemBlock *p,*prev;
+
+        if (!b)
+                return 0;
+    
+        if (!b->heap) {
+                fprintf(stderr, "no heap\n");
+        
+                return -1;
+        }
+    
+        p = b->heap;
+        prev = NULL;
+    
+        while (p && p != b) {
+                prev = p;
+                p = p->next;
+        }
+    
+        if (!p || p->free || p->reserved) {
+                if (!p)
+                        fprintf(stderr, "block not found in heap\n");
+                else if (p->free)
+                        fprintf(stderr, "block already free\n");
+                else
+                        fprintf(stderr, "block is reserved\n");
+	
+	
+                return -1;
+        }
+    
+        p->free = 1;
+        Join2Blocks(p);
+    
+        if (prev)
+                Join2Blocks(prev);
+  
+        return 0;
+}
+
+int via_mmReserveMem(memHeap_t *heap, int offset,int size)
+{
+        int endofs;
+        TMemBlock *p;
+
+        if (!heap || size <= 0)
+                return -1;
+        endofs = offset+size;
+        p = (TMemBlock *)heap;
+    
+        while (p && p->ofs <= offset) {
+                if (ISFREE(p) && endofs <= (p->ofs+p->size)) {
+                        SliceBlock(p,offset,size,1,1);
+                        return 0;
+                }
+                p = p->next;
+        }
+        return -1;
+}
+
+int via_mmFreeReserved(memHeap_t *heap, int offset)
+{
+        TMemBlock *p,*prev;
+
+        if (!heap)
+                return -1;
+  
+        p = (TMemBlock *)heap;
+        prev = NULL;
+    
+        while (p && p->ofs != offset) {
+                prev = p;
+                p = p->next;
+        }
+    
+        if (!p || !p->reserved)
+                return -1;
+        p->free = 1;
+        p->reserved = 0;
+        Join2Blocks(p);
+    
+        if (prev)
+                Join2Blocks(prev);
+    
+        return 0;
+}
+
+void via_mmDestroy(memHeap_t *heap)
+{
+        TMemBlock *p,*q;
+
+        if (!heap)
+                return;
+        p = (TMemBlock *)heap;
+    
+        while (p) {
+                q = p->next;
+                free(p);
+                p = q;
+        }
+}
diff --git a/shared/via_ds.h b/shared/via_ds.h
new file mode 100644
index 00000000..50ab3e7f
--- /dev/null
+++ b/shared/via_ds.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
+ * 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#ifndef _via_ds_h_ 
+#define _via_ds_h_
+
+#include "via.h"
+#include "drmP.h"
+
+/* Set Data Structure */
+#define SET_SIZE 5000
+typedef unsigned int ITEM_TYPE;
+
+typedef struct {
+        ITEM_TYPE val;
+        int alloc_next, free_next;
+} list_item_t;
+
+typedef struct {
+        int alloc;
+        int free;
+        int trace;
+        list_item_t list[SET_SIZE];
+} set_t;
+
+set_t *via_setInit(void);
+int via_setAdd(set_t *set, ITEM_TYPE item);
+int via_setDel(set_t *set, ITEM_TYPE item);
+int via_setFirst(set_t *set, ITEM_TYPE *item);
+int via_setNext(set_t *set, ITEM_TYPE *item);
+int via_setDestroy(set_t *set);
+
+#endif
+
+
+#ifndef MM_INC
+#define MM_INC
+
+struct mem_block_t {
+        struct mem_block_t *next;
+        struct mem_block_t *heap;
+        int ofs,size;
+        int align;
+        int free:1;
+        int reserved:1;
+};
+typedef struct mem_block_t TMemBlock;
+typedef struct mem_block_t *PMemBlock;
+
+/* a heap is just the first block in a chain */
+typedef struct mem_block_t memHeap_t;
+
+static __inline__ int mmBlockSize(PMemBlock b)
+{ return b->size; }
+
+static __inline__ int mmOffset(PMemBlock b)
+{ return b->ofs; }
+
+static __inline__ void mmMarkReserved(PMemBlock b)
+{ b->reserved = 1; }
+
+/* 
+ * input: total size in bytes
+ * return: a heap pointer if OK, NULL if error
+ */
+memHeap_t *via_mmInit(int ofs, int size);
+
+
+PMemBlock  via_mmAllocMem(memHeap_t *heap, int size, int align2, int startSearch);
+
+/*
+ * Free block starts at offset
+ * input: pointer to a block
+ * return: 0 if OK, -1 if error
+ */
+int  via_mmFreeMem(PMemBlock b);
+
+/*
+ * destroy MM
+ */
+void via_mmDestroy(memHeap_t *mmInit);
+
+/* For debugging purpose. */
+void via_mmDumpMemInfo(memHeap_t *mmInit);
+
+#endif
diff --git a/shared/via_irq.c b/shared/via_irq.c
new file mode 100644
index 00000000..835b41cd
--- /dev/null
+++ b/shared/via_irq.c
@@ -0,0 +1,162 @@
+/* via_irq.c
+ *
+ * Copyright 2004 BEAM Ltd.
+ * Copyright 2002 Tungsten Graphics, Inc.
+ * 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
+ * BEAM LTD, TUNGSTEN GRAPHICS  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: 
+ *    Terry Barnaby <terry1@beam.ltd.uk>
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ *
+ *
+ * This code provides standard DRM access to the Via CLE266's Vertical blank
+ * interrupt.
+ */
+
+#include "via.h"
+#include "drmP.h"
+#include "drm.h"
+#include "via_drm.h"
+#include "via_drv.h"
+
+#define VIA_REG_INTERRUPT       0x200
+ 
+/* VIA_REG_INTERRUPT */
+#define VIA_IRQ_GLOBAL          (1 << 31)
+#define VIA_IRQ_VBI_ENABLE      (1 << 19)
+#define VIA_IRQ_VBI_PENDING     (1 << 3)
+
+irqreturn_t DRM(irq_handler)( DRM_IRQ_ARGS )
+
+{
+        drm_device_t*	dev = (drm_device_t*)arg;
+        drm_via_private_t*	dev_priv = (drm_via_private_t*)dev->dev_private;
+        u32			status;
+        int			handled = 0;
+	
+        status = VIA_READ(VIA_REG_INTERRUPT);
+        DRM_DEBUG("viadrv_irq_handler Status: %x\n",status);
+        if(status & VIA_IRQ_VBI_PENDING){
+                atomic_inc(&dev->vbl_received);
+                DRM_WAKEUP(&dev->vbl_queue);
+                DRM(vbl_send_signals)(dev);
+                handled = 1;
+        }
+    
+        /* Acknowlege interrupts ?? */
+        VIA_WRITE(VIA_REG_INTERRUPT, status);
+        return IRQ_RETVAL(handled);
+}
+
+static __inline__ void viadrv_acknowledge_irqs(drm_via_private_t* dev_priv)
+{
+        u32	status;
+	
+        if(dev_priv){
+                /* Acknowlege interrupts ?? */
+                status = VIA_READ(VIA_REG_INTERRUPT);
+                VIA_WRITE(VIA_REG_INTERRUPT, status | VIA_IRQ_VBI_PENDING);
+        }
+}
+
+int DRM(vblank_wait)(drm_device_t* dev, unsigned int* sequence)
+{
+        drm_via_private_t*	dev_priv = (drm_via_private_t*)dev->dev_private;
+        unsigned int		cur_vblank;
+        int			ret = 0;
+
+        DRM_DEBUG("viadrv_vblank_wait\n");
+        if(!dev_priv){
+                DRM_ERROR("%s called with no initialization\n", __FUNCTION__ );
+                return -EINVAL;
+        }
+
+        viadrv_acknowledge_irqs(dev_priv);
+
+        /* Assume that the user has missed the current sequence number
+         * by about a day rather than she wants to wait for years
+         * using vertical blanks... 
+         */
+        DRM_WAIT_ON(ret, dev->vbl_queue, 3*DRM_HZ, 
+                    (((cur_vblank = atomic_read(&dev->vbl_received)) - 
+                      *sequence ) <= (1<<23)));
+
+        *sequence = cur_vblank;
+        return ret;
+}
+
+/*
+ * drm_dma.h hooks
+ */
+void DRM(driver_irq_preinstall)(drm_device_t* dev){
+        drm_via_private_t*	dev_priv = (drm_via_private_t *)dev->dev_private;
+        u32			status;
+
+        DRM_DEBUG("driver_irq_preinstall: dev_priv: %p\n", dev_priv);
+        if(dev_priv){
+                DRM_DEBUG("mmio: %p\n", dev_priv->mmio);
+                status = VIA_READ(VIA_REG_INTERRUPT);
+                DRM_DEBUG("intreg: %x\n", status & VIA_IRQ_VBI_ENABLE);
+		
+                // Clear VSync interrupt regs
+                VIA_WRITE(VIA_REG_INTERRUPT, status & ~VIA_IRQ_VBI_ENABLE);
+
+                /* Clear bits if they're already high */
+                viadrv_acknowledge_irqs(dev_priv);
+        }
+}
+
+void DRM(driver_irq_postinstall)(drm_device_t* dev){
+        drm_via_private_t*	dev_priv = (drm_via_private_t *)dev->dev_private;
+        u32			status;
+
+        DRM_DEBUG("via_driver_irq_postinstall\n");
+        if(dev_priv){
+                status = VIA_READ(VIA_REG_INTERRUPT);
+                VIA_WRITE(VIA_REG_INTERRUPT, status | VIA_IRQ_GLOBAL 
+                          | VIA_IRQ_VBI_ENABLE);
+                /* Some magic, oh for some data sheets ! */		
+
+                VIA_WRITE8(0x83d4, 0x11);
+                VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) | 0x30);
+
+        }
+}
+
+void DRM(driver_irq_uninstall)(drm_device_t* dev){
+        drm_via_private_t*	dev_priv = (drm_via_private_t *)dev->dev_private;
+        u32			status;
+
+        DRM_DEBUG("driver_irq_uninstall)\n");
+        if(dev_priv){ 
+
+                /* Some more magic, oh for some data sheets ! */		
+
+                VIA_WRITE8(0x83d4, 0x11);
+                VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) & ~0x30);
+
+                status = VIA_READ(VIA_REG_INTERRUPT);
+                VIA_WRITE(VIA_REG_INTERRUPT, status & ~VIA_IRQ_VBI_ENABLE);
+        }
+}
+
diff --git a/shared/via_map.c b/shared/via_map.c
new file mode 100644
index 00000000..53260927
--- /dev/null
+++ b/shared/via_map.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#define __NO_VERSION__
+#include "via.h"
+#include "drmP.h"
+#include "via_drv.h"
+
+int via_do_init_map(drm_device_t *dev, drm_via_init_t *init)
+{
+	drm_via_private_t *dev_priv;
+	unsigned int i;
+	
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
+	dev_priv = DRM(alloc)(sizeof(drm_via_private_t), DRM_MEM_DRIVER);
+	if (dev_priv == NULL)
+		return -ENOMEM;
+
+	memset(dev_priv, 0, sizeof(drm_via_private_t));
+	
+	DRM_GETSAREA();
+	if (!dev_priv->sarea) {
+		DRM_ERROR("could not find sarea!\n");
+		dev->dev_private = (void *)dev_priv;
+		via_do_cleanup_map(dev);
+		return -EINVAL;
+	}
+
+	DRM_FIND_MAP(dev_priv->fb, init->fb_offset);
+	if (!dev_priv->fb) {
+		DRM_ERROR("could not find framebuffer!\n");
+		dev->dev_private = (void *)dev_priv;
+		via_do_cleanup_map(dev);
+		return -EINVAL;
+	}
+	DRM_FIND_MAP(dev_priv->mmio, init->mmio_offset);
+	if (!dev_priv->mmio) {
+		DRM_ERROR("could not find mmio region!\n");
+		dev->dev_private = (void *)dev_priv;
+		via_do_cleanup_map(dev);
+		return -EINVAL;
+	}
+	
+	dev_priv->sarea_priv =
+		(drm_via_sarea_t *)((u8 *)dev_priv->sarea->handle +
+                                    init->sarea_priv_offset);
+
+	dev_priv->agpAddr = init->agpAddr;
+
+	
+	for (i=0; i<VIA_NR_XVMC_LOCKS; ++i) 
+                DRM_INIT_WAITQUEUE( &(dev_priv->decoder_queue[i]) );
+
+	dev->dev_private = (void *)dev_priv;
+
+	return 0;
+}
+
+int via_do_cleanup_map(drm_device_t *dev)
+{
+	if (dev->dev_private) {
+
+		drm_via_private_t *dev_priv = dev->dev_private;
+
+		DRM(free)(dev_priv, sizeof(drm_via_private_t),
+                          DRM_MEM_DRIVER);
+		dev->dev_private = NULL;
+	}
+
+	return 0;
+}
+
+int via_map_init( DRM_IOCTL_ARGS )
+{
+        DRM_DEVICE;
+	drm_via_init_t init;
+
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
+	DRM_COPY_FROM_USER_IOCTL(init, (drm_via_init_t *)data, sizeof(init));
+
+	switch (init.func) {
+        case VIA_INIT_MAP:
+		return via_do_init_map(dev, &init);
+        case VIA_CLEANUP_MAP:
+		return via_do_cleanup_map(dev);
+	}
+
+	return -EINVAL;
+}
+
+int via_decoder_futex( DRM_IOCTL_ARGS ) 
+{
+        DRM_DEVICE;
+        drm_via_futex_t fx;
+        volatile int *lock;
+        drm_via_private_t *dev_priv = (drm_via_private_t*) dev->dev_private;
+        drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
+        int ret = 0;
+
+        DRM_COPY_FROM_USER_IOCTL(fx, (drm_via_futex_t *) data, sizeof(fx));
+    
+        if (fx.lock > VIA_NR_XVMC_LOCKS)
+                return -EFAULT;
+
+        lock = XVMCLOCKPTR(sAPriv,fx.lock);
+
+        switch(fx.op) {
+        case VIA_FUTEX_WAIT:
+                DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx.lock], 
+                            (fx.ms / 10)*(DRM_HZ/100), 
+                            *lock != fx.val);
+                return ret;
+        case VIA_FUTEX_WAKE:
+                DRM_WAKEUP( &(dev_priv->decoder_queue[fx.lock]) );
+                return 0;
+        }
+        return 0;
+}
+	    
+	
+    
diff --git a/shared/via_mm.c b/shared/via_mm.c
new file mode 100644
index 00000000..1bf04fe0
--- /dev/null
+++ b/shared/via_mm.c
@@ -0,0 +1,347 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#define __NO_VERSION__
+#include "via.h"
+#include "drmP.h"
+#include "via_drm.h"
+#include "via_drv.h"
+#include "via_ds.h"
+#include "via_mm.h"
+
+#define MAX_CONTEXT 100
+
+unsigned int VIA_DEBUG = 1;
+
+typedef struct {
+        int used;
+        int context;
+        set_t *sets[2]; /* 0 for frame buffer, 1 for AGP , 2 for System*/
+} via_context_t;
+
+static via_context_t global_ppriv[MAX_CONTEXT];
+
+static int add_alloc_set(int context, int type, unsigned int val)
+{
+        int i, retval = 0;
+  
+        for (i = 0; i < MAX_CONTEXT; i++) {
+                if (global_ppriv[i].used && 
+                    global_ppriv[i].context == context) {
+                        retval = via_setAdd(global_ppriv[i].sets[type], val);
+                        break;
+                }
+        }
+  
+        return retval;
+}
+
+static int del_alloc_set(int context, int type, unsigned int val)
+{  
+        int i, retval = 0;
+  
+        for (i = 0; i < MAX_CONTEXT; i++)
+                if (global_ppriv[i].used && 
+                    global_ppriv[i].context == context) {
+                        retval = via_setDel(global_ppriv[i].sets[type], val);
+                        break;
+                }
+  
+        return retval;
+}
+
+/* agp memory management */ 
+static memHeap_t *AgpHeap = NULL;
+
+int via_agp_init( DRM_IOCTL_ARGS )
+{
+        drm_via_agp_t agp;
+  
+        DRM_COPY_FROM_USER_IOCTL(agp, (drm_via_agp_t *)data, sizeof(agp));
+
+        AgpHeap = via_mmInit(agp.offset, agp.size);
+
+        DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
+  
+        return 0;
+}
+
+/* fb memory management */ 
+static memHeap_t *FBHeap = NULL;
+
+int via_fb_init( DRM_IOCTL_ARGS )
+{
+        drm_via_fb_t fb;
+
+   
+        DRM_COPY_FROM_USER_IOCTL(fb, (drm_via_fb_t *)data, sizeof(fb));
+
+        FBHeap = via_mmInit(fb.offset, fb.size);
+
+        DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
+
+        return 0;
+}
+
+int via_init_context(int context)
+{
+        int i;
+    
+        for (i = 0; i < MAX_CONTEXT ; i++)
+                if (global_ppriv[i].used && 
+                    (global_ppriv[i].context == context))
+                        break;
+    
+        if (i >= MAX_CONTEXT) {
+                for (i = 0; i < MAX_CONTEXT ; i++) {
+                        if (!global_ppriv[i].used) {
+                                global_ppriv[i].context = context;
+                                global_ppriv[i].used = 1;
+                                global_ppriv[i].sets[0] = via_setInit();
+                                global_ppriv[i].sets[1] = via_setInit();
+                                DRM_DEBUG("init allocation set, socket=%d,"
+                                          " context = %d\n", i, context);
+                                break;
+                        }
+                }
+	
+                if ((i >= MAX_CONTEXT) || (global_ppriv[i].sets[0] == NULL) ||
+                    (global_ppriv[i].sets[1] == NULL)) {
+                        return 0;
+                }
+        }
+    
+        return 1;
+}
+
+int via_final_context(int context)
+{
+        int i;
+        for (i=0; i<MAX_CONTEXT; i++)
+                if (global_ppriv[i].used && 
+                    (global_ppriv[i].context == context))
+                        break;
+    
+        if (i < MAX_CONTEXT) {
+                set_t *set;
+                unsigned int item;
+                int retval;
+	  
+                DRM_DEBUG("find socket %d, context = %d\n", i, context);
+	    
+                /* Video Memory */
+                set = global_ppriv[i].sets[0];
+                retval = via_setFirst(set, &item);
+                while (retval) {
+                        DRM_DEBUG("free video memory 0x%x\n", item);
+                        via_mmFreeMem((PMemBlock)item);
+                        retval = via_setNext(set, &item);
+                }
+                via_setDestroy(set);
+	    
+                /* AGP Memory */
+                set = global_ppriv[i].sets[1];
+                retval = via_setFirst(set, &item);
+                while (retval) {
+                        DRM_DEBUG("free agp memory 0x%x\n", item);
+                        via_mmFreeMem((PMemBlock)item);
+                        retval = via_setNext(set, &item);
+                }
+                via_setDestroy(set);
+	
+                global_ppriv[i].used = 0;	  
+        }
+    
+        return 1;
+}
+int via_mem_alloc( DRM_IOCTL_ARGS)
+{
+        drm_via_mem_t mem;
+    
+        DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t *)data, sizeof(mem));
+        switch (mem.type) {
+        case VIDEO :
+                if (via_fb_alloc(&mem) < 0)
+                        return -EFAULT;
+                DRM_COPY_TO_USER_IOCTL((drm_via_mem_t *)data, mem, 
+                                       sizeof(mem));
+                return 0;
+        case AGP :
+                if (via_agp_alloc(&mem) < 0)
+                        return -EFAULT;
+                DRM_COPY_TO_USER_IOCTL((drm_via_mem_t *)data, mem, 
+                                       sizeof(mem));
+                return 0;
+        }
+
+        return -EFAULT;
+}
+
+int via_fb_alloc(drm_via_mem_t* mem)
+{
+        drm_via_mm_t fb;
+        PMemBlock block;
+        int retval = 0;
+   
+        if (!FBHeap)
+                return -1;
+
+        fb.size = mem->size;
+        fb.context = mem->context;
+  
+        block = via_mmAllocMem(FBHeap, fb.size, 5, 0);
+        if (block) {
+                fb.offset = block->ofs;
+                fb.free = (unsigned int)block;
+                if (!add_alloc_set(fb.context, VIDEO, fb.free)) {
+                        DRM_DEBUG("adding to allocation set fails\n");
+                        via_mmFreeMem((PMemBlock)fb.free);
+                        retval = -1;
+                }
+        }
+        else {  
+                fb.offset = 0;
+                fb.size = 0;
+                fb.free = 0;
+                retval = -1;
+        }
+   
+        mem->offset = fb.offset;
+        mem->index = fb.free;
+
+        DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size, 
+                  (int)fb.offset);
+  
+        return retval;
+}
+int via_agp_alloc(drm_via_mem_t* mem)
+{
+        drm_via_mm_t agp;
+        PMemBlock block;
+        int retval = 0;
+
+        if (!AgpHeap)
+                return -1;
+
+        agp.size = mem->size;
+        agp.context = mem->context;
+  
+        block = via_mmAllocMem(AgpHeap, agp.size, 5, 0);
+        if (block) {
+                agp.offset = block->ofs;
+                agp.free = (unsigned int)block;
+                if (!add_alloc_set(agp.context, AGP, agp.free)) {
+                        DRM_DEBUG("adding to allocation set fails\n");
+                        via_mmFreeMem((PMemBlock)agp.free);
+                        retval = -1;
+                }
+        }
+        else {  
+                agp.offset = 0;
+                agp.size = 0;
+                agp.free = 0;
+        }	
+   
+        mem->offset = agp.offset;
+        mem->index = agp.free;
+
+        DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp.size, 
+                  (unsigned int)agp.offset);
+        return retval;
+}
+
+int via_mem_free( DRM_IOCTL_ARGS )
+{
+        drm_via_mem_t mem;
+    
+        DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t *)data, sizeof(mem));
+
+        switch (mem.type) {
+
+        case VIDEO :
+                if (via_fb_free(&mem) == 0)
+                        return 0;
+                break;
+        case AGP :
+                if (via_agp_free(&mem) == 0)
+                        return 0;
+                break;
+        }
+    
+        return -EFAULT;
+}
+int via_fb_free(drm_via_mem_t* mem)
+{
+        drm_via_mm_t fb;
+        int retval = 0;
+
+    
+        if (!FBHeap) {
+                return -1;
+        }
+
+        fb.free = mem->index;
+        fb.context = mem->context;
+    
+        if (!fb.free)
+                {
+                        return -1;
+
+                }
+
+        via_mmFreeMem((PMemBlock)fb.free);
+    
+        if (!del_alloc_set(fb.context, VIDEO, fb.free))
+                {
+                        retval = -1;
+                }
+    
+        DRM_DEBUG("free fb, free = %d\n", fb.free);
+    
+        return retval;
+} 
+int via_agp_free(drm_via_mem_t* mem)
+{
+        drm_via_mm_t agp;
+  
+        int retval = 0;
+
+        agp.free = mem->index;
+        agp.context = mem->context;
+    
+        if (!agp.free)
+                return -1;
+
+        via_mmFreeMem((PMemBlock)agp.free);
+    
+        if (!del_alloc_set(agp.context, AGP, agp.free)) {
+                retval = -1;
+	}
+
+        DRM_DEBUG("free agp, free = %d\n", agp.free);
+  
+        return retval;
+}
+
+EXPORT_SYMBOL(via_fb_alloc);
+EXPORT_SYMBOL(via_fb_free);
diff --git a/shared/via_mm.h b/shared/via_mm.h
new file mode 100644
index 00000000..c476ac6a
--- /dev/null
+++ b/shared/via_mm.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. 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, sub license,
+ * 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, 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.
+ */
+#ifndef _via_drm_mm_h_
+#define _via_drm_mm_h_
+
+typedef struct {
+        unsigned int context;
+        unsigned int size;
+        unsigned long offset;
+        unsigned int free;
+} drm_via_mm_t;
+
+typedef struct {
+        unsigned int size;
+        unsigned long handle;
+        void *virtual;
+} drm_via_dma_t;
+
+int via_fb_alloc(drm_via_mem_t *mem);
+int via_fb_free(drm_via_mem_t *mem);
+int via_agp_alloc(drm_via_mem_t *mem);
+int via_agp_free(drm_via_mem_t *mem);
+
+#endif