1 files changed, 0 insertions, 742 deletions

diff --git a/shared/via_dma.c b/shared/via_dma.c
deleted file mode 100644
index 672552e4..00000000
--- a/shared/via_dma.c
+++ /dev/null
@@ -1,742 +0,0 @@
-/* via_dma.c -- DMA support for the VIA Unichrome/Pro
- * 
- * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
- * All Rights Reserved.
- *
- * Copyright 2004 Digeo, Inc., Palo Alto, CA, U.S.A.
- * All Rights Reserved.
- * 
- * Copyright 2004 The Unichrome project.
- * 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
- * THE COPYRIGHT HOLDERS, AUTHORS 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: 
- *    Tungsten Graphics, 
- *    Erdi Chen, 
- *    Thomas Hellstrom.
- */
-
-#include "via.h"
-#include "drmP.h"
-#include "drm.h"
-#include "via_drm.h"
-#include "via_drv.h"
-#include "via_3d_reg.h"
-
-#define CMDBUF_ALIGNMENT_SIZE   (0x100)
-#define CMDBUF_ALIGNMENT_MASK   (0x0ff)
-
-/* defines for VIA 3D registers */
-#define VIA_REG_STATUS          0x400
-#define VIA_REG_TRANSET         0x43C
-#define VIA_REG_TRANSPACE       0x440
-
-/* VIA_REG_STATUS(0x400): Engine Status */
-#define VIA_CMD_RGTR_BUSY       0x00000080	/* Command Regulator is busy */
-#define VIA_2D_ENG_BUSY         0x00000001	/* 2D Engine is busy */
-#define VIA_3D_ENG_BUSY         0x00000002	/* 3D Engine is busy */
-#define VIA_VR_QUEUE_BUSY       0x00020000	/* Virtual Queue is busy */
-
-#define SetReg2DAGP(nReg, nData) {				\
-	*((uint32_t *)(vb)) = ((nReg) >> 2) | HALCYON_HEADER1;	\
-	*((uint32_t *)(vb) + 1) = (nData);			\
-	vb = ((uint32_t *)vb) + 2;				\
-	dev_priv->dma_low +=8;					\
-}
-
-#define via_flush_write_combine() DRM_MEMORYBARRIER() 
-
-#define VIA_OUT_RING_QW(w1,w2)			\
-	*vb++ = (w1);				\
-	*vb++ = (w2);				\
-	dev_priv->dma_low += 8; 
-
-static void via_cmdbuf_start(drm_via_private_t * dev_priv);
-static void via_cmdbuf_pause(drm_via_private_t * dev_priv);
-static void via_cmdbuf_reset(drm_via_private_t * dev_priv);
-static void via_cmdbuf_rewind(drm_via_private_t * dev_priv);
-static int via_wait_idle(drm_via_private_t * dev_priv);
-static void via_pad_cache(drm_via_private_t *dev_priv, int qwords);
-
-
-/*
- * Free space in command buffer.
- */
-
-static uint32_t
-via_cmdbuf_space(drm_via_private_t *dev_priv)
-{
-	uint32_t agp_base = dev_priv->dma_offset + 
-		(uint32_t) dev_priv->agpAddr;
-	uint32_t hw_addr = *(dev_priv->hw_addr_ptr) - agp_base;
-	
-	return ((hw_addr <= dev_priv->dma_low) ? 
-		(dev_priv->dma_high + hw_addr - dev_priv->dma_low) : 
-		(hw_addr - dev_priv->dma_low));
-}
-
-/*
- * How much does the command regulator lag behind?
- */
-
-static uint32_t
-via_cmdbuf_lag(drm_via_private_t *dev_priv)
-{
-	uint32_t agp_base = dev_priv->dma_offset + 
-		(uint32_t) dev_priv->agpAddr;
-	uint32_t hw_addr = *(dev_priv->hw_addr_ptr) - agp_base;
-	
-	return ((hw_addr <= dev_priv->dma_low) ? 
-		(dev_priv->dma_low - hw_addr) : 
-		(dev_priv->dma_wrap + dev_priv->dma_low - hw_addr));
-}
-
-/*
- * Check that the given size fits in the buffer, otherwise wait.
- */
-
-static inline int
-via_cmdbuf_wait(drm_via_private_t * dev_priv, unsigned int size)
-{
-	uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
-	uint32_t cur_addr, hw_addr, next_addr;
-	volatile uint32_t *hw_addr_ptr;
-	uint32_t count;
-	hw_addr_ptr = dev_priv->hw_addr_ptr;
-	cur_addr = dev_priv->dma_low;
-	next_addr = cur_addr + size + 512*1024;
-	count = 1000000;
-	do {
-	        hw_addr = *hw_addr_ptr - agp_base;
-		if (count-- == 0) {
-			DRM_ERROR("via_cmdbuf_wait timed out hw %x cur_addr %x next_addr %x\n",
-				  hw_addr, cur_addr, next_addr);
-			return -1;
-		}
-	} while ((cur_addr < hw_addr) && (next_addr >= hw_addr));
-	return 0;
-}
-
-
-/*
- * Checks whether buffer head has reach the end. Rewind the ring buffer
- * when necessary.
- *
- * Returns virtual pointer to ring buffer.
- */
-
-static inline uint32_t *via_check_dma(drm_via_private_t * dev_priv,
-				      unsigned int size)
-{
-	if ((dev_priv->dma_low + size + 4*CMDBUF_ALIGNMENT_SIZE) > dev_priv->dma_high) {
-		via_cmdbuf_rewind(dev_priv);
-	}
-	if (via_cmdbuf_wait(dev_priv, size) != 0) {
-		return NULL;
-	}
-
-	return (uint32_t *) (dev_priv->dma_ptr + dev_priv->dma_low);
-}
-
-int via_dma_cleanup(drm_device_t * dev)
-{
-	if (dev->dev_private) {
-		drm_via_private_t *dev_priv =
-			(drm_via_private_t *) dev->dev_private;
-
-		if (dev_priv->ring.virtual_start) {
-			via_cmdbuf_reset(dev_priv);
-
-			drm_core_ioremapfree(&dev_priv->ring.map, dev);
-			dev_priv->ring.virtual_start = NULL;
-		}
-
-	}
-
-	return 0;
-}
-
-static int via_initialize(drm_device_t * dev,
-			  drm_via_private_t * dev_priv,
-			  drm_via_dma_init_t * init)
-{
-	if (!dev_priv || !dev_priv->mmio) {
-		DRM_ERROR("via_dma_init called before via_map_init\n");
-		return DRM_ERR(EFAULT);
-	}
-
-	if (dev_priv->ring.virtual_start != NULL) {
-		DRM_ERROR("%s called again without calling cleanup\n",
-			  __FUNCTION__);
-		return DRM_ERR(EFAULT);
-	}
-
-	if (!dev->agp || !dev->agp->base) {
-		DRM_ERROR("%s called with no agp memory available\n", 
-			  __FUNCTION__);
-		return DRM_ERR(EFAULT);
-	}
-
-	dev_priv->ring.map.offset = dev->agp->base + init->offset;
-	dev_priv->ring.map.size = init->size;
-	dev_priv->ring.map.type = 0;
-	dev_priv->ring.map.flags = 0;
-	dev_priv->ring.map.mtrr = 0;
-
-	drm_core_ioremap(&dev_priv->ring.map, dev);
-
-	if (dev_priv->ring.map.handle == NULL) {
-		via_dma_cleanup(dev);
-		DRM_ERROR("can not ioremap virtual address for"
-			  " ring buffer\n");
-		return DRM_ERR(ENOMEM);
-	}
-
-	dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
-
-	dev_priv->dma_ptr = dev_priv->ring.virtual_start;
-	dev_priv->dma_low = 0;
-	dev_priv->dma_high = init->size;
-	dev_priv->dma_wrap = init->size;
-	dev_priv->dma_offset = init->offset;
-	dev_priv->last_pause_ptr = NULL;
-	dev_priv->hw_addr_ptr = dev_priv->mmio->handle + init->reg_pause_addr;
-
-	via_cmdbuf_start(dev_priv);
-
-	return 0;
-}
-
-int via_dma_init(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
-	drm_via_dma_init_t init;
-	int retcode = 0;
-
-	DRM_COPY_FROM_USER_IOCTL(init, (drm_via_dma_init_t *) data,
-				 sizeof(init));
-
-	switch (init.func) {
-	case VIA_INIT_DMA:
-		if (!capable(CAP_SYS_ADMIN))
-			retcode = DRM_ERR(EPERM);
-		else
-			retcode = via_initialize(dev, dev_priv, &init);
-		break;
-	case VIA_CLEANUP_DMA:
-		if (!capable(CAP_SYS_ADMIN))
-			retcode = DRM_ERR(EPERM);
-		else
-			retcode = via_dma_cleanup(dev);
-		break;
-        case VIA_DMA_INITIALIZED:
-		retcode = (dev_priv->ring.virtual_start != NULL) ? 
-			0: DRM_ERR( EFAULT );
-	        break;
-	default:
-		retcode = DRM_ERR(EINVAL);
-		break;
-	}
-
-	return retcode;
-}
-
-
-
-static int via_dispatch_cmdbuffer(drm_device_t * dev, drm_via_cmdbuffer_t * cmd)
-{
-	drm_via_private_t *dev_priv;
-	uint32_t *vb;
-	int ret;
-
-	dev_priv = (drm_via_private_t *) dev->dev_private;
-
-	if (dev_priv->ring.virtual_start == NULL) {
-		DRM_ERROR("%s called without initializing AGP ring buffer.\n",
-			  __FUNCTION__);
-		return DRM_ERR(EFAULT);
-	}
-
-	if (cmd->size > VIA_PCI_BUF_SIZE) {
-		return DRM_ERR(ENOMEM);
-	} 
-
-
-	if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
-		return DRM_ERR(EFAULT);
-
-	/*
-	 * Running this function on AGP memory is dead slow. Therefore
-	 * we run it on a temporary cacheable system memory buffer and
-	 * copy it to AGP memory when ready.
-	 */
-
-		
-	if ((ret = via_verify_command_stream((uint32_t *)dev_priv->pci_buf, cmd->size, dev, 1))) {
-		return ret;
-	}
-       	
-	
-	vb = via_check_dma(dev_priv, (cmd->size < 0x100) ? 0x102 : cmd->size);
-	if (vb == NULL) {
-		return DRM_ERR(EAGAIN);
-	}
-
-	memcpy(vb, dev_priv->pci_buf, cmd->size);
-	
-	dev_priv->dma_low += cmd->size;
-
-	/*
-	 * Small submissions somehow stalls the CPU. (AGP cache effects?)
-	 * pad to greater size.
-	 */
-
-	if (cmd->size < 0x100)
-	  via_pad_cache(dev_priv,(0x100 - cmd->size) >> 3);
-	via_cmdbuf_pause(dev_priv);
-
-	return 0;
-}
-
-int via_driver_dma_quiescent(drm_device_t * dev)
-{
-	drm_via_private_t *dev_priv = dev->dev_private;
-
-	if (!via_wait_idle(dev_priv)) {
-		return DRM_ERR(EBUSY);
-	}
-	return 0;
-}
-
-int via_flush_ioctl(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-
-	LOCK_TEST_WITH_RETURN( dev, filp );
-
-	return via_driver_dma_quiescent(dev);
-}
-
-int via_cmdbuffer(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	drm_via_cmdbuffer_t cmdbuf;
-	int ret;
-
-	LOCK_TEST_WITH_RETURN( dev, filp );
-
-	DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_via_cmdbuffer_t *) data,
-				 sizeof(cmdbuf));
-
-	DRM_DEBUG("via cmdbuffer, buf %p size %lu\n", cmdbuf.buf, cmdbuf.size);
-
-	ret = via_dispatch_cmdbuffer(dev, &cmdbuf);
-	if (ret) {
-		return ret;
-	}
-
-	return 0;
-}
-
-extern int 
-via_parse_command_stream(drm_device_t *dev, const uint32_t * buf, unsigned int size);
-static int via_dispatch_pci_cmdbuffer(drm_device_t * dev,
-				      drm_via_cmdbuffer_t * cmd)
-{
-	drm_via_private_t *dev_priv = dev->dev_private;
-	int ret;
-
-	if (cmd->size > VIA_PCI_BUF_SIZE) {
-		return DRM_ERR(ENOMEM);
-	} 
-	if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
-		return DRM_ERR(EFAULT);
-	
-	if ((ret = via_verify_command_stream((uint32_t *)dev_priv->pci_buf, cmd->size, dev, 0))) {
-		return ret;
-	}
-	
-	ret = via_parse_command_stream(dev, (const uint32_t *)dev_priv->pci_buf, cmd->size);
-	return ret;
-}
-
-int via_pci_cmdbuffer(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	drm_via_cmdbuffer_t cmdbuf;
-	int ret;
-
-	LOCK_TEST_WITH_RETURN( dev, filp );
-
-	DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_via_cmdbuffer_t *) data,
-				 sizeof(cmdbuf));
-
-	DRM_DEBUG("via_pci_cmdbuffer, buf %p size %lu\n", cmdbuf.buf,
-		  cmdbuf.size);
-
-	ret = via_dispatch_pci_cmdbuffer(dev, &cmdbuf);
-	if (ret) {
-		return ret;
-	}
-
-	return 0;
-}
-
-
-static inline uint32_t *via_align_buffer(drm_via_private_t * dev_priv,
-					 uint32_t * vb, int qw_count)
-{
-        for (; qw_count > 0; --qw_count) {
-		VIA_OUT_RING_QW(HC_DUMMY, HC_DUMMY);
-	}
-	return vb;
-}
-
-
-/*
- * This function is used internally by ring buffer mangement code.
- *
- * Returns virtual pointer to ring buffer.
- */
-static inline uint32_t *via_get_dma(drm_via_private_t * dev_priv)
-{
-	return (uint32_t *) (dev_priv->dma_ptr + dev_priv->dma_low);
-}
-
-/*
- * Hooks a segment of data into the tail of the ring-buffer by
- * modifying the pause address stored in the buffer itself. If
- * the regulator has already paused, restart it.
- */
-static int via_hook_segment(drm_via_private_t *dev_priv,
-			    uint32_t pause_addr_hi, uint32_t pause_addr_lo,
-			    int no_pci_fire)
-{
-	int paused, count;
-	volatile uint32_t *paused_at = dev_priv->last_pause_ptr;
-
-	via_flush_write_combine();
-	while(! *(via_get_dma(dev_priv)-1));
-	*dev_priv->last_pause_ptr = pause_addr_lo;
-	via_flush_write_combine();
-
-	/*
-	 * The below statement is inserted to really force the flush.
-	 * Not sure it is needed.
-	 */
-
-	while(! *dev_priv->last_pause_ptr);
-	dev_priv->last_pause_ptr = via_get_dma(dev_priv) - 1;
-	while(! *dev_priv->last_pause_ptr);
-
-
-	paused = 0;
-	count = 20; 
-
-	while (!(paused = (VIA_READ(0x41c) & 0x80000000)) && count--);
-	if ((count <= 8) && (count >= 0)) {
-		uint32_t rgtr, ptr;
-		rgtr = *(dev_priv->hw_addr_ptr);
-		ptr = ((char *)dev_priv->last_pause_ptr - dev_priv->dma_ptr) + 
-			dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4 - 
-			CMDBUF_ALIGNMENT_SIZE;
-		if (rgtr <= ptr) {
-			DRM_ERROR("Command regulator\npaused at count %d, address %x, "
-				  "while current pause address is %x.\n"
-				  "Please mail this message to "
-				  "<unichrome-devel@lists.sourceforge.net>\n",
-				  count, rgtr, ptr);
-		}
-	}
-		
-	if (paused && !no_pci_fire) {
-	        uint32_t rgtr,ptr;
-		uint32_t ptr_low;
-
-		count = 1000000;
-		while ((VIA_READ(VIA_REG_STATUS) & VIA_CMD_RGTR_BUSY) && count--);
-		
-		rgtr = *(dev_priv->hw_addr_ptr);
-		ptr = ((char *)paused_at - dev_priv->dma_ptr) + 
-			dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4;
-		
-
-		ptr_low = (ptr > 3*CMDBUF_ALIGNMENT_SIZE) ? 
-			ptr - 3*CMDBUF_ALIGNMENT_SIZE : 0;
-		if (rgtr <= ptr && rgtr >= ptr_low) {
-			VIA_WRITE(VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
-			VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_hi);
-			VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_lo);
-		} 
-	}
-	return paused;
-}
-
-
-
-static int via_wait_idle(drm_via_private_t * dev_priv)
-{
-	int count = 10000000;
-	while (count-- && (VIA_READ(VIA_REG_STATUS) &
-			   (VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY |
-			    VIA_3D_ENG_BUSY))) ;
-	return count;
-}
-
-static uint32_t *via_align_cmd(drm_via_private_t * dev_priv, uint32_t cmd_type,
-			       uint32_t addr, uint32_t *cmd_addr_hi, 
-			       uint32_t *cmd_addr_lo,
-			       int skip_wait)
-{
-	uint32_t agp_base;
-	uint32_t cmd_addr, addr_lo, addr_hi;
-	uint32_t *vb;
-	uint32_t qw_pad_count;
-
-	if (!skip_wait)
-		via_cmdbuf_wait(dev_priv, 2*CMDBUF_ALIGNMENT_SIZE);
-
-	vb = via_get_dma(dev_priv);
-	VIA_OUT_RING_QW( HC_HEADER2 | ((VIA_REG_TRANSET >> 2) << 12) |
-			 (VIA_REG_TRANSPACE >> 2), HC_ParaType_PreCR << 16); 
-	agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
-	qw_pad_count = (CMDBUF_ALIGNMENT_SIZE >> 3) -
-		((dev_priv->dma_low & CMDBUF_ALIGNMENT_MASK) >> 3);
-
-	
-	cmd_addr = (addr) ? addr : 
-		agp_base + dev_priv->dma_low - 8 + (qw_pad_count << 3);
-	addr_lo = ((HC_SubA_HAGPBpL << 24) | (cmd_type & HC_HAGPBpID_MASK) |
-		   (cmd_addr & HC_HAGPBpL_MASK));
-	addr_hi = ((HC_SubA_HAGPBpH << 24) | (cmd_addr >> 24));
-
-	vb = via_align_buffer(dev_priv, vb, qw_pad_count - 1);
-	VIA_OUT_RING_QW(*cmd_addr_hi = addr_hi, 
-			*cmd_addr_lo = addr_lo);
-	return vb;
-}
-
-
-
-
-static void via_cmdbuf_start(drm_via_private_t * dev_priv)
-{
-	uint32_t pause_addr_lo, pause_addr_hi;
-	uint32_t start_addr, start_addr_lo;
-	uint32_t end_addr, end_addr_lo;
-	uint32_t command;
-	uint32_t agp_base;
-
-
-	dev_priv->dma_low = 0;
-
-	agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
-	start_addr = agp_base;
-	end_addr = agp_base + dev_priv->dma_high;
-
-	start_addr_lo = ((HC_SubA_HAGPBstL << 24) | (start_addr & 0xFFFFFF));
-	end_addr_lo = ((HC_SubA_HAGPBendL << 24) | (end_addr & 0xFFFFFF));
-	command = ((HC_SubA_HAGPCMNT << 24) | (start_addr >> 24) |
-		   ((end_addr & 0xff000000) >> 16));
-
-	dev_priv->last_pause_ptr = 
-		via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, 
-			      &pause_addr_hi, & pause_addr_lo, 1) - 1;
-
-	via_flush_write_combine();
-	while(! *dev_priv->last_pause_ptr);
-
-	VIA_WRITE(VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
-	VIA_WRITE(VIA_REG_TRANSPACE, command);
-	VIA_WRITE(VIA_REG_TRANSPACE, start_addr_lo);
-	VIA_WRITE(VIA_REG_TRANSPACE, end_addr_lo);
-
-	VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_hi);
-	VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_lo);
-
-	VIA_WRITE(VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK);
-}
-
-static void via_pad_cache(drm_via_private_t *dev_priv, int qwords)
-{
-	uint32_t *vb;
-
-	via_cmdbuf_wait(dev_priv, qwords + 2);
-	vb = via_get_dma(dev_priv);
-	VIA_OUT_RING_QW( HC_HEADER2, HC_ParaType_NotTex << 16);
-	via_align_buffer(dev_priv,vb,qwords);
-}
-
-static inline void via_dummy_bitblt(drm_via_private_t * dev_priv)
-{
-	uint32_t *vb = via_get_dma(dev_priv);
-	SetReg2DAGP(0x0C, (0 | (0 << 16)));
-	SetReg2DAGP(0x10, 0 | (0 << 16));
-	SetReg2DAGP(0x0, 0x1 | 0x2000 | 0xAA000000); 
-}
-
-
-static void via_cmdbuf_jump(drm_via_private_t * dev_priv)
-{
-	uint32_t agp_base;
-	uint32_t pause_addr_lo, pause_addr_hi;
-	uint32_t jump_addr_lo, jump_addr_hi;
-	volatile uint32_t *last_pause_ptr;
-	uint32_t dma_low_save1, dma_low_save2;
-
-	agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
-	via_align_cmd(dev_priv,  HC_HAGPBpID_JUMP, 0, &jump_addr_hi, 
-		      &jump_addr_lo, 0);
-	
-	dev_priv->dma_wrap = dev_priv->dma_low;
-
-
-	/*
-	 * Wrap command buffer to the beginning.
-	 */
-
-	dev_priv->dma_low = 0;
-	if (via_cmdbuf_wait(dev_priv, CMDBUF_ALIGNMENT_SIZE) != 0) {
-		DRM_ERROR("via_cmdbuf_jump failed\n");
-	}
-
-	via_dummy_bitblt(dev_priv);
-	via_dummy_bitblt(dev_priv); 
-
-	last_pause_ptr = via_align_cmd(dev_priv,  HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, 
-				       &pause_addr_lo, 0) -1;
-	via_align_cmd(dev_priv,  HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, 
-		      &pause_addr_lo, 0);
-
-	*last_pause_ptr = pause_addr_lo;
-	dma_low_save1 = dev_priv->dma_low;
-
-	/*
-	 * Now, set a trap that will pause the regulator if it tries to rerun the old
-	 * command buffer. (Which may happen if via_hook_segment detecs a command regulator pause
-	 * and reissues the jump command over PCI, while the regulator has already taken the jump
-	 * and actually paused at the current buffer end).
-	 * There appears to be no other way to detect this condition, since the hw_addr_pointer
-	 * does not seem to get updated immediately when a jump occurs.
-	 */
-
-	last_pause_ptr = via_align_cmd(dev_priv,  HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, 
-				       &pause_addr_lo, 0) -1;
-	via_align_cmd(dev_priv,  HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, 
-		      &pause_addr_lo, 0);
-	*last_pause_ptr = pause_addr_lo;
-
-	dma_low_save2 = dev_priv->dma_low;
-	dev_priv->dma_low = dma_low_save1;	
-	via_hook_segment( dev_priv, jump_addr_hi, jump_addr_lo, 0);
-	dev_priv->dma_low = dma_low_save2;
-	via_hook_segment( dev_priv, pause_addr_hi, pause_addr_lo, 0);
-}
-
-
-static void via_cmdbuf_rewind(drm_via_private_t * dev_priv)
-{
-	via_cmdbuf_jump(dev_priv); 
-}
-
-static void via_cmdbuf_flush(drm_via_private_t * dev_priv, uint32_t cmd_type)
-{
-	uint32_t pause_addr_lo, pause_addr_hi;
-
-	via_align_cmd(dev_priv, cmd_type, 0, &pause_addr_hi, &pause_addr_lo, 0);
-	via_hook_segment( dev_priv, pause_addr_hi, pause_addr_lo, 0);
-}
-
-
-static void via_cmdbuf_pause(drm_via_private_t * dev_priv)
-{
-	via_cmdbuf_flush(dev_priv, HC_HAGPBpID_PAUSE);
-}
-
-static void via_cmdbuf_reset(drm_via_private_t * dev_priv)
-{
-	via_cmdbuf_flush(dev_priv, HC_HAGPBpID_STOP);
-	via_wait_idle(dev_priv);
-}
-
-/*
- * User interface to the space and lag functions.
- */
-
-int 
-via_cmdbuf_size(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	drm_via_cmdbuf_size_t d_siz;
-	int ret = 0;
-	uint32_t tmp_size, count;
-	drm_via_private_t *dev_priv;
-
-	DRM_DEBUG("via cmdbuf_size\n");
-	LOCK_TEST_WITH_RETURN( dev, filp );
-
-	dev_priv = (drm_via_private_t *) dev->dev_private;
-
-	if (dev_priv->ring.virtual_start == NULL) {
-		DRM_ERROR("%s called without initializing AGP ring buffer.\n",
-			  __FUNCTION__);
-		return DRM_ERR(EFAULT);
-	}
-
-	DRM_COPY_FROM_USER_IOCTL(d_siz, (drm_via_cmdbuf_size_t *) data,
-				 sizeof(d_siz));
-
-
-	count = 1000000;
-	tmp_size = d_siz.size;
-	switch(d_siz.func) {
-	case VIA_CMDBUF_SPACE:
-		while (((tmp_size = via_cmdbuf_space(dev_priv)) < d_siz.size) && count--) {
-			if (!d_siz.wait) {
-				break;
-			}
-		}
-		if (!count) {
-			DRM_ERROR("VIA_CMDBUF_SPACE timed out.\n");
-			ret = DRM_ERR(EAGAIN);
-		}
-		break;
-	case VIA_CMDBUF_LAG:
-		while (((tmp_size = via_cmdbuf_lag(dev_priv)) > d_siz.size) && count--) {
-			if (!d_siz.wait) {
-				break;
-			}
-		}
-		if (!count) {
-			DRM_ERROR("VIA_CMDBUF_LAG timed out.\n");
-			ret = DRM_ERR(EAGAIN);
-		}
-		break;
-	default:
-		ret = DRM_ERR(EFAULT);
-	}
-	d_siz.size = tmp_size;
-
-	DRM_COPY_TO_USER_IOCTL((drm_via_cmdbuf_size_t *) data, d_siz,
-			       sizeof(d_siz));
-	return ret;
-}