1 files changed, 96 insertions, 275 deletions

diff --git a/linux-core/i810_dma.c b/linux-core/i810_dma.c
index ae0a3616..4f434199 100644
--- a/linux-core/i810_dma.c
+++ b/linux-core/i810_dma.c
@@ -26,7 +26,7 @@
  *
  * Authors: Rickard E. (Rik) Faith <faith@valinux.com>
  *	    Jeff Hartmann <jhartmann@valinux.com>
- *          Keith Whitwell <keithw@valinux.com>
+ *          Keith Whitwell <keith_whitwell@yahoo.com>
  *
  */
 
@@ -36,11 +36,6 @@
 #include "i810_drv.h"
 #include <linux/interrupt.h>	/* For task queue support */
 
-/* in case we don't have a 2.3.99-pre6 kernel or later: */
-#ifndef VM_DONTCOPY
-#define VM_DONTCOPY 0
-#endif
-
 #define I810_BUF_FREE		2
 #define I810_BUF_CLIENT		1
 #define I810_BUF_HARDWARE      	0
@@ -50,30 +45,28 @@
 
 #define RING_LOCALS	unsigned int outring, ringmask; volatile char *virt;
 
-#define BEGIN_LP_RING(n) do {				\
-	if (I810_VERBOSE)				\
-		DRM_DEBUG("BEGIN_LP_RING(%d) in %s\n",	\
-			  n, __FUNCTION__);		\
-	if (dev_priv->ring.space < n*4) 		\
-		i810_wait_ring(dev, n*4);		\
-	dev_priv->ring.space -= n*4;			\
-	outring = dev_priv->ring.tail;			\
-	ringmask = dev_priv->ring.tail_mask;		\
-	virt = dev_priv->ring.virtual_start;		\
+#define BEGIN_LP_RING(n) do {						\
+	if (0) DRM_DEBUG("BEGIN_LP_RING(%d) in %s\n", n, __FUNCTION__);	\
+	if (dev_priv->ring.space < n*4)					\
+		i810_wait_ring(dev, n*4);				\
+	dev_priv->ring.space -= n*4;					\
+	outring = dev_priv->ring.tail;					\
+	ringmask = dev_priv->ring.tail_mask;				\
+	virt = dev_priv->ring.virtual_start;				\
 } while (0)
 
-#define ADVANCE_LP_RING() do {					\
-	if (I810_VERBOSE) DRM_DEBUG("ADVANCE_LP_RING\n");	\
-	dev_priv->ring.tail = outring;				\
-	I810_WRITE(LP_RING + RING_TAIL, outring);		\
+#define ADVANCE_LP_RING() do {				\
+	if (0) DRM_DEBUG("ADVANCE_LP_RING\n");			\
+	dev_priv->ring.tail = outring;			\
+	I810_WRITE(LP_RING + RING_TAIL, outring);	\
 } while(0)
 
-#define OUT_RING(n) do {						\
-	if (I810_VERBOSE) DRM_DEBUG("   OUT_RING %x\n", (int)(n));	\
-	*(volatile unsigned int *)(virt + outring) = n;			\
-	outring += 4;							\
-	outring &= ringmask;						\
-} while (0);
+#define OUT_RING(n) do {				\
+	if (0) DRM_DEBUG("   OUT_RING %x\n", (int)(n));	\
+	*(volatile unsigned int *)(virt + outring) = n;	\
+	outring += 4;					\
+	outring &= ringmask;				\
+} while (0)
 
 static inline void i810_print_status_page(drm_device_t *dev)
 {
@@ -182,36 +175,31 @@ static int i810_map_buffer(drm_buf_t *buf, struct file *filp)
 
 	if(buf_priv->currently_mapped == I810_BUF_MAPPED) return -EINVAL;
 
-	if(VM_DONTCOPY != 0) {
 #if LINUX_VERSION_CODE <= 0x020402
-		down( &current->mm->mmap_sem );
+	down( &current->mm->mmap_sem );
 #else
-		down_write( &current->mm->mmap_sem );
+	down_write( &current->mm->mmap_sem );
 #endif
-		old_fops = filp->f_op;
-		filp->f_op = &i810_buffer_fops;
-		dev_priv->mmap_buffer = buf;
-		buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
-						    PROT_READ|PROT_WRITE,
-						    MAP_SHARED,
-						    buf->bus_address);
-		dev_priv->mmap_buffer = NULL;
-   		filp->f_op = old_fops;
-		if ((unsigned long)buf_priv->virtual > -1024UL) {
-			/* Real error */
-			DRM_DEBUG("mmap error\n");
-			retcode = (signed int)buf_priv->virtual;
-			buf_priv->virtual = 0;
-		}
+	old_fops = filp->f_op;
+	filp->f_op = &i810_buffer_fops;
+	dev_priv->mmap_buffer = buf;
+	buf_priv->virtual = (void *)do_mmap(filp, 0, buf->total,
+					    PROT_READ|PROT_WRITE,
+					    MAP_SHARED,
+					    buf->bus_address);
+	dev_priv->mmap_buffer = NULL;
+	filp->f_op = old_fops;
+	if ((unsigned long)buf_priv->virtual > -1024UL) {
+		/* Real error */
+		DRM_DEBUG("mmap error\n");
+		retcode = (signed int)buf_priv->virtual;
+		buf_priv->virtual = 0;
+	}
 #if LINUX_VERSION_CODE <= 0x020402
-		up( &current->mm->mmap_sem );
+	up( &current->mm->mmap_sem );
 #else
-		up_write( &current->mm->mmap_sem );
+	up_write( &current->mm->mmap_sem );
 #endif
-	} else {
-		buf_priv->virtual = buf_priv->kernel_virtual;
-   		buf_priv->currently_mapped = I810_BUF_MAPPED;
-	}
 	return retcode;
 }
 
@@ -220,23 +208,21 @@ static int i810_unmap_buffer(drm_buf_t *buf)
 	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
 	int retcode = 0;
 
-	if(VM_DONTCOPY != 0) {
-		if(buf_priv->currently_mapped != I810_BUF_MAPPED)
-			return -EINVAL;
+	if(buf_priv->currently_mapped != I810_BUF_MAPPED)
+		return -EINVAL;
 #if LINUX_VERSION_CODE <= 0x020402
-		down( &current->mm->mmap_sem );
+	down( &current->mm->mmap_sem );
 #else
-		down_write( &current->mm->mmap_sem );
+	down_write( &current->mm->mmap_sem );
 #endif
-        	retcode = do_munmap(current->mm,
-				    (unsigned long)buf_priv->virtual,
-				    (size_t) buf->total);
+	retcode = do_munmap(current->mm,
+			    (unsigned long)buf_priv->virtual,
+			    (size_t) buf->total);
 #if LINUX_VERSION_CODE <= 0x020402
-		up( &current->mm->mmap_sem );
+	up( &current->mm->mmap_sem );
 #else
-		up_write( &current->mm->mmap_sem );
+	up_write( &current->mm->mmap_sem );
 #endif
-	}
    	buf_priv->currently_mapped = I810_BUF_UNMAPPED;
    	buf_priv->virtual = 0;
 
@@ -445,9 +431,6 @@ static int i810_dma_initialize(drm_device_t *dev,
 		((u8 *)dev_priv->sarea_map->handle +
 		 init->sarea_priv_offset);
 
-   	atomic_set(&dev_priv->flush_done, 0);
-	init_waitqueue_head(&dev_priv->flush_queue);
-
    	dev_priv->ring.Start = init->ring_start;
    	dev_priv->ring.End = init->ring_end;
    	dev_priv->ring.Size = init->ring_size;
@@ -540,16 +523,12 @@ int i810_dma_init(struct inode *inode, struct file *filp,
 
 /* Most efficient way to verify state for the i810 is as it is
  * emitted.  Non-conformant state is silently dropped.
- *
- * Use 'volatile' & local var tmp to force the emitted values to be
- * identical to the verified ones.
  */
 static void i810EmitContextVerified( drm_device_t *dev,
-				     volatile unsigned int *code )
+				     unsigned int *code )
 {
    	drm_i810_private_t *dev_priv = dev->dev_private;
 	int i, j = 0;
-	unsigned int tmp;
 	RING_LOCALS;
 
 	BEGIN_LP_RING( I810_CTX_SETUP_SIZE );
@@ -561,14 +540,13 @@ static void i810EmitContextVerified( drm_device_t *dev,
 	OUT_RING( code[I810_CTXREG_ST1] );
 
 	for ( i = 4 ; i < I810_CTX_SETUP_SIZE ; i++ ) {
-		tmp = code[i];
-
-		if ((tmp & (7<<29)) == (3<<29) &&
-		    (tmp & (0x1f<<24)) < (0x1d<<24))
+		if ((code[i] & (7<<29)) == (3<<29) &&
+		    (code[i] & (0x1f<<24)) < (0x1d<<24))
 		{
-			OUT_RING( tmp );
+			OUT_RING( code[i] );
 			j++;
 		}
+		else printk("constext state dropped!!!\n");
 	}
 
 	if (j & 1)
@@ -582,7 +560,6 @@ static void i810EmitTexVerified( drm_device_t *dev,
 {
    	drm_i810_private_t *dev_priv = dev->dev_private;
 	int i, j = 0;
-	unsigned int tmp;
 	RING_LOCALS;
 
 	BEGIN_LP_RING( I810_TEX_SETUP_SIZE );
@@ -593,14 +570,14 @@ static void i810EmitTexVerified( drm_device_t *dev,
 	OUT_RING( code[I810_TEXREG_MI3] );
 
 	for ( i = 4 ; i < I810_TEX_SETUP_SIZE ; i++ ) {
-		tmp = code[i];
 
-		if ((tmp & (7<<29)) == (3<<29) &&
-		    (tmp & (0x1f<<24)) < (0x1d<<24))
+		if ((code[i] & (7<<29)) == (3<<29) &&
+		    (code[i] & (0x1f<<24)) < (0x1d<<24))
 		{
-			OUT_RING( tmp );
+			OUT_RING( code[i] );
 			j++;
 		}
+		else printk("texture state dropped!!!\n");
 	}
 
 	if (j & 1)
@@ -625,9 +602,9 @@ static void i810EmitDestVerified( drm_device_t *dev,
 	if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
 		OUT_RING( CMD_OP_DESTBUFFER_INFO );
 		OUT_RING( tmp );
-	} else
-	   DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
-		     tmp, dev_priv->front_di1, dev_priv->back_di1);
+	} 
+	else
+	   printk("buffer state dropped\n");
 
 	/* invarient:
 	 */
@@ -712,7 +689,6 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 			continue;
 
 	   	if ( flags & I810_FRONT ) {
-		   	DRM_DEBUG("clear front\n");
 			BEGIN_LP_RING( 6 );
 			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
@@ -725,7 +701,6 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 		}
 
 		if ( flags & I810_BACK ) {
-			DRM_DEBUG("clear back\n");
 			BEGIN_LP_RING( 6 );
 			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
@@ -738,7 +713,6 @@ static void i810_dma_dispatch_clear( drm_device_t *dev, int flags,
 		}
 
 		if ( flags & I810_DEPTH ) {
-			DRM_DEBUG("clear depth\n");
 			BEGIN_LP_RING( 6 );
 			OUT_RING( BR00_BITBLT_CLIENT |
 				  BR00_OP_COLOR_BLT | 0x3 );
@@ -764,8 +738,6 @@ static void i810_dma_dispatch_swap( drm_device_t *dev )
 	int i;
 	RING_LOCALS;
 
-	DRM_DEBUG("swapbuffers\n");
-
   	i810_kernel_lost_context(dev);
 
       	if (nbox > I810_NR_SAREA_CLIPRECTS)
@@ -784,10 +756,6 @@ static void i810_dma_dispatch_swap( drm_device_t *dev )
 		    pbox->y2 > dev_priv->h)
 			continue;
 
-	   	DRM_DEBUG("dispatch swap %d,%d-%d,%d!\n",
-			  pbox[i].x1, pbox[i].y1,
-			  pbox[i].x2, pbox[i].y2);
-
 		BEGIN_LP_RING( 6 );
 		OUT_RING( BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4 );
 		OUT_RING( pitch | (0xCC << 16));
@@ -812,7 +780,7 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
    	int nbox = sarea_priv->nbox;
 	unsigned long address = (unsigned long)buf->bus_address;
 	unsigned long start = address - dev->agp->base;
-	int i = 0, u;
+	int i = 0;
    	RING_LOCALS;
 
    	i810_kernel_lost_context(dev);
@@ -820,33 +788,16 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
    	if (nbox > I810_NR_SAREA_CLIPRECTS)
 		nbox = I810_NR_SAREA_CLIPRECTS;
 
-	if (discard) {
-		u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
-			    I810_BUF_HARDWARE);
-		if(u != I810_BUF_CLIENT) {
-			DRM_DEBUG("xxxx 2\n");
-		}
-	}
-
 	if (used > 4*1024)
 		used = 0;
 
 	if (sarea_priv->dirty)
 	   i810EmitState( dev );
 
-  	DRM_DEBUG("dispatch vertex addr 0x%lx, used 0x%x nbox %d\n",
-		  address, used, nbox);
-
-   	dev_priv->counter++;
-   	DRM_DEBUG(  "dispatch counter : %ld\n", dev_priv->counter);
-   	DRM_DEBUG(  "i810_dma_dispatch\n");
-   	DRM_DEBUG(  "start : %lx\n", start);
-	DRM_DEBUG(  "used : %d\n", used);
-   	DRM_DEBUG(  "start + used - 4 : %ld\n", start + used - 4);
-
 	if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
-		*(u32 *)buf_priv->virtual = (GFX_OP_PRIMITIVE |
-					     sarea_priv->vertex_prim |
+		unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);
+
+		*(u32 *)buf_priv->virtual = (GFX_OP_PRIMITIVE | prim | 
 					     ((used/4)-2));
 
 		if (used & 4) {
@@ -879,154 +830,62 @@ static void i810_dma_dispatch_vertex(drm_device_t *dev,
 		} while (++i < nbox);
 	}
 
-	BEGIN_LP_RING(10);
-	OUT_RING( CMD_STORE_DWORD_IDX );
-	OUT_RING( 20 );
-	OUT_RING( dev_priv->counter );
-	OUT_RING( 0 );
-
 	if (discard) {
+		dev_priv->counter++;
+
+		(void) cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
+			       I810_BUF_HARDWARE);
+
+		BEGIN_LP_RING(8);
+		OUT_RING( CMD_STORE_DWORD_IDX );
+		OUT_RING( 20 );
+		OUT_RING( dev_priv->counter );
 		OUT_RING( CMD_STORE_DWORD_IDX );
 		OUT_RING( buf_priv->my_use_idx );
 		OUT_RING( I810_BUF_FREE );
+		OUT_RING( CMD_REPORT_HEAD );
 		OUT_RING( 0 );
+		ADVANCE_LP_RING();
 	}
-
-      	OUT_RING( CMD_REPORT_HEAD );
-	OUT_RING( 0 );
-   	ADVANCE_LP_RING();
-}
-
-
-/* Interrupts are only for flushing */
-void i810_dma_service(int irq, void *device, struct pt_regs *regs)
-{
-	drm_device_t	 *dev = (drm_device_t *)device;
-      	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
-   	u16 temp;
-
-	atomic_inc(&dev->counts[_DRM_STAT_IRQ]);
-      	temp = I810_READ16(I810REG_INT_IDENTITY_R);
-   	temp = temp & ~(0x6000);
-   	if(temp != 0) I810_WRITE16(I810REG_INT_IDENTITY_R,
-				   temp); /* Clear all interrupts */
-	else
-	   return;
-
-   	queue_task(&dev->tq, &tq_immediate);
-   	mark_bh(IMMEDIATE_BH);
 }
 
-void i810_dma_immediate_bh(void *device)
-{
-	drm_device_t *dev = (drm_device_t *) device;
-      	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
-
-   	atomic_set(&dev_priv->flush_done, 1);
-   	wake_up_interruptible(&dev_priv->flush_queue);
-}
-
-static inline void i810_dma_emit_flush(drm_device_t *dev)
-{
-   	drm_i810_private_t *dev_priv = dev->dev_private;
-   	RING_LOCALS;
-
-   	i810_kernel_lost_context(dev);
-
-   	BEGIN_LP_RING(2);
-      	OUT_RING( CMD_REPORT_HEAD );
-      	OUT_RING( GFX_OP_USER_INTERRUPT );
-      	ADVANCE_LP_RING();
-
-/*  	i810_wait_ring( dev, dev_priv->ring.Size - 8 ); */
-/*     	atomic_set(&dev_priv->flush_done, 1); */
-/*     	wake_up_interruptible(&dev_priv->flush_queue); */
-}
 
-static inline void i810_dma_quiescent_emit(drm_device_t *dev)
+void i810_dma_quiescent(drm_device_t *dev)
 {
       	drm_i810_private_t *dev_priv = dev->dev_private;
    	RING_LOCALS;
 
+/*  	printk("%s\n", __FUNCTION__); */
+
   	i810_kernel_lost_context(dev);
 
    	BEGIN_LP_RING(4);
    	OUT_RING( INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE );
    	OUT_RING( CMD_REPORT_HEAD );
       	OUT_RING( 0 );
-      	OUT_RING( GFX_OP_USER_INTERRUPT );
+      	OUT_RING( 0 );
    	ADVANCE_LP_RING();
 
-/*  	i810_wait_ring( dev, dev_priv->ring.Size - 8 ); */
-/*     	atomic_set(&dev_priv->flush_done, 1); */
-/*     	wake_up_interruptible(&dev_priv->flush_queue); */
-}
-
-void i810_dma_quiescent(drm_device_t *dev)
-{
-      	DECLARE_WAITQUEUE(entry, current);
-  	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
-	unsigned long end;
-
-   	if(dev_priv == NULL) {
-	   	return;
-	}
-      	atomic_set(&dev_priv->flush_done, 0);
-   	add_wait_queue(&dev_priv->flush_queue, &entry);
-   	end = jiffies + (HZ*3);
-
-   	for (;;) {
-		current->state = TASK_INTERRUPTIBLE;
-	      	i810_dma_quiescent_emit(dev);
-	   	if (atomic_read(&dev_priv->flush_done) == 1) break;
-		if((signed)(end - jiffies) <= 0) {
-		   	DRM_ERROR("lockup\n");
-		   	break;
-		}
-	      	schedule_timeout(HZ*3);
-	      	if (signal_pending(current)) {
-		   	break;
-		}
-	}
-
-   	current->state = TASK_RUNNING;
-   	remove_wait_queue(&dev_priv->flush_queue, &entry);
-
-   	return;
+	i810_wait_ring( dev, dev_priv->ring.Size - 8 );
 }
 
 static int i810_flush_queue(drm_device_t *dev)
 {
-   	DECLARE_WAITQUEUE(entry, current);
-  	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
+   	drm_i810_private_t *dev_priv = dev->dev_private;
 	drm_device_dma_t *dma = dev->dma;
-	unsigned long end;
    	int i, ret = 0;
+   	RING_LOCALS;
+	
+/*  	printk("%s\n", __FUNCTION__); */
 
-   	if(dev_priv == NULL) {
-	   	return 0;
-	}
-      	atomic_set(&dev_priv->flush_done, 0);
-   	add_wait_queue(&dev_priv->flush_queue, &entry);
-   	end = jiffies + (HZ*3);
-   	for (;;) {
-		current->state = TASK_INTERRUPTIBLE;
-	      	i810_dma_emit_flush(dev);
-	   	if (atomic_read(&dev_priv->flush_done) == 1) break;
-		if((signed)(end - jiffies) <= 0) {
-		   	DRM_ERROR("lockup\n");
-		   	break;
-		}
-	      	schedule_timeout(HZ*3);
-	      	if (signal_pending(current)) {
-		   	ret = -EINTR; /* Can't restart */
-		   	break;
-		}
-	}
+   	i810_kernel_lost_context(dev);
 
-   	current->state = TASK_RUNNING;
-   	remove_wait_queue(&dev_priv->flush_queue, &entry);
+   	BEGIN_LP_RING(2);
+      	OUT_RING( CMD_REPORT_HEAD );
+      	OUT_RING( 0 );
+      	ADVANCE_LP_RING();
 
+	i810_wait_ring( dev, dev_priv->ring.Size - 8 );
 
    	for (i = 0; i < dma->buf_count; i++) {
 	   	drm_buf_t *buf = dma->buflist[ i ];
@@ -1038,7 +897,7 @@ static int i810_flush_queue(drm_device_t *dev)
 		if (used == I810_BUF_HARDWARE)
 			DRM_DEBUG("reclaimed from HARDWARE\n");
 		if (used == I810_BUF_CLIENT)
-			DRM_DEBUG("still on client HARDWARE\n");
+			DRM_DEBUG("still on client\n");
 	}
 
    	return ret;
@@ -1078,7 +937,6 @@ int i810_flush_ioctl(struct inode *inode, struct file *filp,
    	drm_file_t	  *priv	  = filp->private_data;
    	drm_device_t	  *dev	  = priv->dev;
 
-   	DRM_DEBUG("i810_flush_ioctl\n");
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_flush_ioctl called without lock held\n");
 		return -EINVAL;
@@ -1109,9 +967,6 @@ int i810_dma_vertex(struct inode *inode, struct file *filp,
 		return -EINVAL;
 	}
 
-	DRM_DEBUG("i810 dma vertex, idx %d used %d discard %d\n",
-		  vertex.idx, vertex.used, vertex.discard);
-
 	if(vertex.idx < 0 || vertex.idx > dma->buf_count) return -EINVAL;
 
 	i810_dma_dispatch_vertex( dev,
@@ -1160,8 +1015,6 @@ int i810_swap_bufs(struct inode *inode, struct file *filp,
 	drm_file_t *priv = filp->private_data;
 	drm_device_t *dev = priv->dev;
 
-	DRM_DEBUG("i810_swap_bufs\n");
-
    	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
 		DRM_ERROR("i810_swap_buf called without lock held\n");
 		return -EINVAL;
@@ -1197,7 +1050,6 @@ int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
    	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
      					dev_priv->sarea_priv;
 
-	DRM_DEBUG("getbuf\n");
    	if (copy_from_user(&d, (drm_i810_dma_t *)arg, sizeof(d)))
 		return -EFAULT;
 
@@ -1210,9 +1062,6 @@ int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
 
 	retcode = i810_dma_get_buffer(dev, &d, filp);
 
-	DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
-		  current->pid, retcode, d.granted);
-
 	if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
 		return -EFAULT;
    	sarea_priv->last_dispatch = (int) hw_status[5];
@@ -1220,47 +1069,19 @@ int i810_getbuf(struct inode *inode, struct file *filp, unsigned int cmd,
 	return retcode;
 }
 
-int i810_copybuf(struct inode *inode, struct file *filp, unsigned int cmd,
-		unsigned long arg)
+int i810_copybuf(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_i810_copy_t	  d;
-   	drm_i810_private_t *dev_priv = (drm_i810_private_t *)dev->dev_private;
-   	u32 *hw_status = (u32 *)dev_priv->hw_status_page;
-   	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
-     					dev_priv->sarea_priv;
-	drm_buf_t *buf;
-	drm_i810_buf_priv_t *buf_priv;
-	drm_device_dma_t *dma = dev->dma;
-
-	if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
-		DRM_ERROR("i810_dma called without lock held\n");
-		return -EINVAL;
-	}
-
-   	if (copy_from_user(&d, (drm_i810_copy_t *)arg, sizeof(d)))
-		return -EFAULT;
-
-        if(d.idx < 0 || d.idx > dma->buf_count) return -EINVAL;
-	buf = dma->buflist[ d.idx ];
-   	buf_priv = buf->dev_private;
-	if (buf_priv->currently_mapped != I810_BUF_MAPPED) return -EPERM;
-
-	if(d.used < 0 || d.used > buf->total) return -EINVAL;
-
-   	if (copy_from_user(buf_priv->virtual, d.address, d.used))
-		return -EFAULT;
-
-   	sarea_priv->last_dispatch = (int) hw_status[5];
-
+	/* Never copy - 2.4.x doesn't need it */
 	return 0;
 }
 
 int i810_docopy(struct inode *inode, struct file *filp, unsigned int cmd,
 		unsigned long arg)
 {
-	if(VM_DONTCOPY == 0) return 1;
+	/* Never copy - 2.4.x doesn't need it */
 	return 0;
 }