diff --git a/drivers/gpu/drm/via/Makefile b/drivers/gpu/drm/via/Makefile
index d59e258..b537e4b 100644
--- a/drivers/gpu/drm/via/Makefile
+++ b/drivers/gpu/drm/via/Makefile
@@ -3,6 +3,6 @@
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
 ccflags-y := -Iinclude/drm
-via-y    := via_irq.o via_drv.o via_map.o via_mm.o via_dma.o via_verifier.o via_video.o via_dmablit.o
+via-y    := via_irq.o via_drv.o via_map.o via_mm.o via_h1_cmdbuf.o via_verifier.o via_video.o via_h1_dma.o
 
 obj-$(CONFIG_DRM_VIA)	+=via.o
diff --git a/drivers/gpu/drm/via/via_dma.c b/drivers/gpu/drm/via/via_dma.c
deleted file mode 100644
index 13558f5..0000000
--- a/drivers/gpu/drm/via/via_dma.c
+++ /dev/null
@@ -1,740 +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 <drm/drmP.h>
-#include <drm/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)	do {		\
-	*vb++ = (w1);				\
-	*vb++ = (w2);				\
-	dev_priv->dma_low += 8;			\
-} while (0)
-
-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;
-		}
-		if  ((cur_addr < hw_addr) && (next_addr >= hw_addr))
-			msleep(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(struct drm_device *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(struct drm_device *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 -EFAULT;
-	}
-
-	if (dev_priv->ring.virtual_start != NULL) {
-		DRM_ERROR("called again without calling cleanup\n");
-		return -EFAULT;
-	}
-
-	if (!dev->agp || !dev->agp->base) {
-		DRM_ERROR("called with no agp memory available\n");
-		return -EFAULT;
-	}
-
-	if (dev_priv->chipset == VIA_DX9_0) {
-		DRM_ERROR("AGP DMA is not supported on this chip\n");
-		return -EINVAL;
-	}
-
-	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 -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 =
-		(volatile uint32_t *)((char *)dev_priv->mmio->handle +
-		init->reg_pause_addr);
-
-	via_cmdbuf_start(dev_priv);
-
-	return 0;
-}
-
-static int via_dma_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
-	drm_via_dma_init_t *init = data;
-	int retcode = 0;
-
-	switch (init->func) {
-	case VIA_INIT_DMA:
-		if (!DRM_SUSER(DRM_CURPROC))
-			retcode = -EPERM;
-		else
-			retcode = via_initialize(dev, dev_priv, init);
-		break;
-	case VIA_CLEANUP_DMA:
-		if (!DRM_SUSER(DRM_CURPROC))
-			retcode = -EPERM;
-		else
-			retcode = via_dma_cleanup(dev);
-		break;
-	case VIA_DMA_INITIALIZED:
-		retcode = (dev_priv->ring.virtual_start != NULL) ?
-			0 : -EFAULT;
-		break;
-	default:
-		retcode = -EINVAL;
-		break;
-	}
-
-	return retcode;
-}
-
-static int via_dispatch_cmdbuffer(struct drm_device *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("called without initializing AGP ring buffer.\n");
-		return -EFAULT;
-	}
-
-	if (cmd->size > VIA_PCI_BUF_SIZE)
-		return -ENOMEM;
-
-	if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
-		return -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 -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(struct drm_device *dev)
-{
-	drm_via_private_t *dev_priv = dev->dev_private;
-
-	if (!via_wait_idle(dev_priv))
-		return -EBUSY;
-	return 0;
-}
-
-static int via_flush_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-
-	LOCK_TEST_WITH_RETURN(dev, file_priv);
-
-	return via_driver_dma_quiescent(dev);
-}
-
-static int via_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-	drm_via_cmdbuffer_t *cmdbuf = data;
-	int ret;
-
-	LOCK_TEST_WITH_RETURN(dev, file_priv);
-
-	DRM_DEBUG("buf %p size %lu\n", cmdbuf->buf, cmdbuf->size);
-
-	ret = via_dispatch_cmdbuffer(dev, cmdbuf);
-	return ret;
-}
-
-static int via_dispatch_pci_cmdbuffer(struct drm_device *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 -ENOMEM;
-	if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
-		return -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;
-}
-
-static int via_pci_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-	drm_via_cmdbuffer_t *cmdbuf = data;
-	int ret;
-
-	LOCK_TEST_WITH_RETURN(dev, file_priv);
-
-	DRM_DEBUG("buf %p size %lu\n", cmdbuf->buf, cmdbuf->size);
-
-	ret = via_dispatch_pci_cmdbuffer(dev, cmdbuf);
-	return ret;
-}
-
-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 management 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;
-	uint32_t reader, ptr;
-	uint32_t diff;
-
-	paused = 0;
-	via_flush_write_combine();
-	(void) *(volatile uint32_t *)(via_get_dma(dev_priv) - 1);
-
-	*paused_at = pause_addr_lo;
-	via_flush_write_combine();
-	(void) *paused_at;
-
-	reader = *(dev_priv->hw_addr_ptr);
-	ptr = ((volatile char *)paused_at - dev_priv->dma_ptr) +
-		dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4;
-
-	dev_priv->last_pause_ptr = via_get_dma(dev_priv) - 1;
-
-	/*
-	 * If there is a possibility that the command reader will
-	 * miss the new pause address and pause on the old one,
-	 * In that case we need to program the new start address
-	 * using PCI.
-	 */
-
-	diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
-	count = 10000000;
-	while (diff == 0 && count--) {
-		paused = (VIA_READ(0x41c) & 0x80000000);
-		if (paused)
-			break;
-		reader = *(dev_priv->hw_addr_ptr);
-		diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
-	}
-
-	paused = VIA_READ(0x41c) & 0x80000000;
-
-	if (paused && !no_pci_fire) {
-		reader = *(dev_priv->hw_addr_ptr);
-		diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
-		diff &= (dev_priv->dma_high - 1);
-		if (diff != 0 && diff < (dev_priv->dma_high >> 1)) {
-			DRM_ERROR("Paused at incorrect address. "
-				  "0x%08x, 0x%08x 0x%08x\n",
-				  ptr, reader, dev_priv->dma_diff);
-		} else if (diff == 0) {
-			/*
-			 * There is a concern that these writes may stall the PCI bus
-			 * if the GPU is not idle. However, idling the GPU first
-			 * doesn't make a difference.
-			 */
-
-			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);
-			VIA_READ(VIA_REG_TRANSPACE);
-		}
-	}
-	return paused;
-}
-
-static int via_wait_idle(drm_via_private_t *dev_priv)
-{
-	int count = 10000000;
-
-	while (!(VIA_READ(VIA_REG_STATUS) & VIA_VR_QUEUE_BUSY) && --count)
-		;
-
-	while (count && (VIA_READ(VIA_REG_STATUS) &
-			   (VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY |
-			    VIA_3D_ENG_BUSY)))
-		--count;
-	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;
-	uint32_t ptr;
-	uint32_t reader;
-	int count;
-
-	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();
-	(void) *(volatile uint32_t *)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);
-	DRM_WRITEMEMORYBARRIER();
-	VIA_WRITE(VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK);
-	VIA_READ(VIA_REG_TRANSPACE);
-
-	dev_priv->dma_diff = 0;
-
-	count = 10000000;
-	while (!(VIA_READ(0x41c) & 0x80000000) && count--);
-
-	reader = *(dev_priv->hw_addr_ptr);
-	ptr = ((volatile char *)dev_priv->last_pause_ptr - dev_priv->dma_ptr) +
-	    dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4;
-
-	/*
-	 * This is the difference between where we tell the
-	 * command reader to pause and where it actually pauses.
-	 * This differs between hw implementation so we need to
-	 * detect it.
-	 */
-
-	dev_priv->dma_diff = ptr - reader;
-}
-
-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.
- */
-
-static int via_cmdbuf_size(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-	drm_via_cmdbuf_size_t *d_siz = data;
-	int ret = 0;
-	uint32_t tmp_size, count;
-	drm_via_private_t *dev_priv;
-
-	DRM_DEBUG("\n");
-	LOCK_TEST_WITH_RETURN(dev, file_priv);
-
-	dev_priv = (drm_via_private_t *) dev->dev_private;
-
-	if (dev_priv->ring.virtual_start == NULL) {
-		DRM_ERROR("called without initializing AGP ring buffer.\n");
-		return -EFAULT;
-	}
-
-	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 = -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 = -EAGAIN;
-		}
-		break;
-	default:
-		ret = -EFAULT;
-	}
-	d_siz->size = tmp_size;
-
-	return ret;
-}
-
-struct drm_ioctl_desc via_ioctls[] = {
-	DRM_IOCTL_DEF_DRV(VIA_ALLOCMEM, via_mem_alloc, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_FREEMEM, via_mem_free, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_AGP_INIT, via_agp_init, DRM_AUTH|DRM_MASTER),
-	DRM_IOCTL_DEF_DRV(VIA_FB_INIT, via_fb_init, DRM_AUTH|DRM_MASTER),
-	DRM_IOCTL_DEF_DRV(VIA_MAP_INIT, via_map_init, DRM_AUTH|DRM_MASTER),
-	DRM_IOCTL_DEF_DRV(VIA_DEC_FUTEX, via_decoder_futex, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_DMA_INIT, via_dma_init, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_CMDBUFFER, via_cmdbuffer, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_FLUSH, via_flush_ioctl, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_PCICMD, via_pci_cmdbuffer, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_CMDBUF_SIZE, via_cmdbuf_size, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_WAIT_IRQ, via_wait_irq, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_DMA_BLIT, via_dma_blit, DRM_AUTH),
-	DRM_IOCTL_DEF_DRV(VIA_BLIT_SYNC, via_dma_blit_sync, DRM_AUTH)
-};
-
-int via_max_ioctl = DRM_ARRAY_SIZE(via_ioctls);
diff --git a/drivers/gpu/drm/via/via_dma.h b/drivers/gpu/drm/via/via_dma.h
new file mode 100644
index 0000000..b002475
--- /dev/null
+++ b/drivers/gpu/drm/via/via_dma.h
@@ -0,0 +1,134 @@
+/* via_dma.h -- PCI DMA BitBlt support for the VIA Unichrome/Pro
+ *
+ * Copyright 2005 Thomas Hellstrom.
+ * 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:
+ *    Thomas Hellstrom.
+ *    Register info from Digeo Inc.
+ */
+
+#ifndef _VIA_DMA_H
+#define _VIA_DMA_H
+
+#include <linux/dma-mapping.h>
+
+#define VIA_NUM_BLIT_ENGINES 2
+#define VIA_NUM_BLIT_SLOTS 8
+
+#define VIA_OUT_RING_H1(nReg, nData) {				\
+	*((uint32_t *)(vb)) = ((nReg) >> 2) | HALCYON_HEADER1;	\
+	*((uint32_t *)(vb) + 1) = (nData);			\
+        vb = ((uint32_t *)vb) + 2;				\
+        dev_priv->dma_low += 8;					\
+}
+
+/* For H5/6 2D cmd load(Two value :cmd with address)***/
+#define VIA_OUT_RING_QW(w1, w2) do {		\
+        *vb++ = (w1);				\
+        *vb++ = (w2);				\
+	dev_priv->dma_low += 8;			\
+} while (0)
+
+struct via_h1_header {
+	uint32_t mem_addr;
+	uint32_t dev_addr;
+	uint32_t size;
+	uint32_t next;
+};
+
+struct drm_via_sg_info {
+	struct ttm_tt *ttm;
+	unsigned long **desc_pages;
+	int num_desc_pages;
+	int num_desc;
+	enum dma_data_direction direction;
+	unsigned long dev_start;
+	dma_addr_t chain_start;
+	unsigned int descriptors_per_page;
+	int aborted;
+	enum {
+		dr_via_device_mapped,
+		dr_via_desc_pages_alloc,
+		dr_via_pages_locked,
+		dr_via_pages_alloc,
+		dr_via_sg_init
+	} state;
+};
+
+/*
+ *  PCI DMA Registers
+ *  Channels 2 & 3 don't seem to be implemented in hardware.
+ */
+
+#define VIA_PCI_DMA_MAR0            0xE40   /* Memory Address Register of Channel 0 */
+#define VIA_PCI_DMA_DAR0            0xE44   /* Device Address Register of Channel 0 */
+#define VIA_PCI_DMA_BCR0            0xE48   /* Byte Count Register of Channel 0 */
+#define VIA_PCI_DMA_DPR0            0xE4C   /* Descriptor Pointer Register of Channel 0 */
+
+#define VIA_PCI_DMA_MAR1            0xE50   /* Memory Address Register of Channel 1 */
+#define VIA_PCI_DMA_DAR1            0xE54   /* Device Address Register of Channel 1 */
+#define VIA_PCI_DMA_BCR1            0xE58   /* Byte Count Register of Channel 1 */
+#define VIA_PCI_DMA_DPR1            0xE5C   /* Descriptor Pointer Register of Channel 1 */
+
+#define VIA_PCI_DMA_MAR2            0xE60   /* Memory Address Register of Channel 2 */
+#define VIA_PCI_DMA_DAR2            0xE64   /* Device Address Register of Channel 2 */
+#define VIA_PCI_DMA_BCR2            0xE68   /* Byte Count Register of Channel 2 */
+#define VIA_PCI_DMA_DPR2            0xE6C   /* Descriptor Pointer Register of Channel 2 */
+
+#define VIA_PCI_DMA_MAR3            0xE70   /* Memory Address Register of Channel 3 */
+#define VIA_PCI_DMA_DAR3            0xE74   /* Device Address Register of Channel 3 */
+#define VIA_PCI_DMA_BCR3            0xE78   /* Byte Count Register of Channel 3 */
+#define VIA_PCI_DMA_DPR3            0xE7C   /* Descriptor Pointer Register of Channel 3 */
+
+#define VIA_PCI_DMA_MR0             0xE80   /* Mode Register of Channel 0 */
+#define VIA_PCI_DMA_MR1             0xE84   /* Mode Register of Channel 1 */
+#define VIA_PCI_DMA_MR2             0xE88   /* Mode Register of Channel 2 */
+#define VIA_PCI_DMA_MR3             0xE8C   /* Mode Register of Channel 3 */
+
+#define VIA_PCI_DMA_CSR0            0xE90   /* Command/Status Register of Channel 0 */
+#define VIA_PCI_DMA_CSR1            0xE94   /* Command/Status Register of Channel 1 */
+#define VIA_PCI_DMA_CSR2            0xE98   /* Command/Status Register of Channel 2 */
+#define VIA_PCI_DMA_CSR3            0xE9C   /* Command/Status Register of Channel 3 */
+
+#define VIA_PCI_DMA_PTR             0xEA0   /* Priority Type Register */
+
+/* Define for DMA engine */
+/* DPR */
+#define VIA_DMA_DPR_EC		(1<<1)	/* end of chain */
+#define VIA_DMA_DPR_DDIE	(1<<2)	/* descriptor done interrupt enable */
+#define VIA_DMA_DPR_DT		(1<<3)	/* direction of transfer (RO) */
+
+/* MR */
+#define VIA_DMA_MR_CM		(1<<0)	/* chaining mode */
+#define VIA_DMA_MR_TDIE		(1<<1)	/* transfer done interrupt enable */
+#define VIA_DMA_MR_HENDMACMD		(1<<7) /* ? */
+
+/* CSR */
+#define VIA_DMA_CSR_DE		(1<<0)	/* DMA enable */
+#define VIA_DMA_CSR_TS		(1<<1)	/* transfer start */
+#define VIA_DMA_CSR_TA		(1<<2)	/* transfer abort */
+#define VIA_DMA_CSR_TD		(1<<3)	/* transfer done */
+#define VIA_DMA_CSR_DD		(1<<4)	/* descriptor done */
+#define VIA_DMA_DPR_EC          (1<<1)  /* end of chain */
+
+#endif
diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c
deleted file mode 100644
index 8b0f259..0000000
--- a/drivers/gpu/drm/via/via_dmablit.c
+++ /dev/null
@@ -1,808 +0,0 @@
-/* via_dmablit.c -- PCI DMA BitBlt support for the VIA Unichrome/Pro
- *
- * Copyright (C) 2005 Thomas Hellstrom, 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:
- *    Thomas Hellstrom.
- *    Partially based on code obtained from Digeo Inc.
- */
-
-
-/*
- * Unmaps the DMA mappings.
- * FIXME: Is this a NoOp on x86? Also
- * FIXME: What happens if this one is called and a pending blit has previously done
- * the same DMA mappings?
- */
-
-#include <drm/drmP.h>
-#include <drm/via_drm.h>
-#include "via_drv.h"
-#include "via_dmablit.h"
-
-#include <linux/pagemap.h>
-#include <linux/slab.h>
-
-#define VIA_PGDN(x)	     (((unsigned long)(x)) & PAGE_MASK)
-#define VIA_PGOFF(x)	    (((unsigned long)(x)) & ~PAGE_MASK)
-#define VIA_PFN(x)	      ((unsigned long)(x) >> PAGE_SHIFT)
-
-typedef struct _drm_via_descriptor {
-	uint32_t mem_addr;
-	uint32_t dev_addr;
-	uint32_t size;
-	uint32_t next;
-} drm_via_descriptor_t;
-
-
-/*
- * Unmap a DMA mapping.
- */
-
-
-
-static void
-via_unmap_blit_from_device(struct pci_dev *pdev, drm_via_sg_info_t *vsg)
-{
-	int num_desc = vsg->num_desc;
-	unsigned cur_descriptor_page = num_desc / vsg->descriptors_per_page;
-	unsigned descriptor_this_page = num_desc % vsg->descriptors_per_page;
-	drm_via_descriptor_t *desc_ptr = vsg->desc_pages[cur_descriptor_page] +
-		descriptor_this_page;
-	dma_addr_t next = vsg->chain_start;
-
-	while (num_desc--) {
-		if (descriptor_this_page-- == 0) {
-			cur_descriptor_page--;
-			descriptor_this_page = vsg->descriptors_per_page - 1;
-			desc_ptr = vsg->desc_pages[cur_descriptor_page] +
-				descriptor_this_page;
-		}
-		dma_unmap_single(&pdev->dev, next, sizeof(*desc_ptr), DMA_TO_DEVICE);
-		dma_unmap_page(&pdev->dev, desc_ptr->mem_addr, desc_ptr->size, vsg->direction);
-		next = (dma_addr_t) desc_ptr->next;
-		desc_ptr--;
-	}
-}
-
-/*
- * If mode = 0, count how many descriptors are needed.
- * If mode = 1, Map the DMA pages for the device, put together and map also the descriptors.
- * Descriptors are run in reverse order by the hardware because we are not allowed to update the
- * 'next' field without syncing calls when the descriptor is already mapped.
- */
-
-static void
-via_map_blit_for_device(struct pci_dev *pdev,
-		   const drm_via_dmablit_t *xfer,
-		   drm_via_sg_info_t *vsg,
-		   int mode)
-{
-	unsigned cur_descriptor_page = 0;
-	unsigned num_descriptors_this_page = 0;
-	unsigned char *mem_addr = xfer->mem_addr;
-	unsigned char *cur_mem;
-	unsigned char *first_addr = (unsigned char *)VIA_PGDN(mem_addr);
-	uint32_t fb_addr = xfer->fb_addr;
-	uint32_t cur_fb;
-	unsigned long line_len;
-	unsigned remaining_len;
-	int num_desc = 0;
-	int cur_line;
-	dma_addr_t next = 0 | VIA_DMA_DPR_EC;
-	drm_via_descriptor_t *desc_ptr = NULL;
-
-	if (mode == 1)
-		desc_ptr = vsg->desc_pages[cur_descriptor_page];
-
-	for (cur_line = 0; cur_line < xfer->num_lines; ++cur_line) {
-
-		line_len = xfer->line_length;
-		cur_fb = fb_addr;
-		cur_mem = mem_addr;
-
-		while (line_len > 0) {
-
-			remaining_len = min(PAGE_SIZE-VIA_PGOFF(cur_mem), line_len);
-			line_len -= remaining_len;
-
-			if (mode == 1) {
-				desc_ptr->mem_addr =
-					dma_map_page(&pdev->dev,
-						     vsg->pages[VIA_PFN(cur_mem) -
-								VIA_PFN(first_addr)],
-						     VIA_PGOFF(cur_mem), remaining_len,
-						     vsg->direction);
-				desc_ptr->dev_addr = cur_fb;
-
-				desc_ptr->size = remaining_len;
-				desc_ptr->next = (uint32_t) next;
-				next = dma_map_single(&pdev->dev, desc_ptr, sizeof(*desc_ptr),
-						      DMA_TO_DEVICE);
-				desc_ptr++;
-				if (++num_descriptors_this_page >= vsg->descriptors_per_page) {
-					num_descriptors_this_page = 0;
-					desc_ptr = vsg->desc_pages[++cur_descriptor_page];
-				}
-			}
-
-			num_desc++;
-			cur_mem += remaining_len;
-			cur_fb += remaining_len;
-		}
-
-		mem_addr += xfer->mem_stride;
-		fb_addr += xfer->fb_stride;
-	}
-
-	if (mode == 1) {
-		vsg->chain_start = next;
-		vsg->state = dr_via_device_mapped;
-	}
-	vsg->num_desc = num_desc;
-}
-
-/*
- * Function that frees up all resources for a blit. It is usable even if the
- * blit info has only been partially built as long as the status enum is consistent
- * with the actual status of the used resources.
- */
-
-
-static void
-via_free_sg_info(struct pci_dev *pdev, drm_via_sg_info_t *vsg)
-{
-	struct page *page;
-	int i;
-
-	switch (vsg->state) {
-	case dr_via_device_mapped:
-		via_unmap_blit_from_device(pdev, vsg);
-	case dr_via_desc_pages_alloc:
-		for (i = 0; i < vsg->num_desc_pages; ++i) {
-			if (vsg->desc_pages[i] != NULL)
-				free_page((unsigned long)vsg->desc_pages[i]);
-		}
-		kfree(vsg->desc_pages);
-	case dr_via_pages_locked:
-		for (i = 0; i < vsg->num_pages; ++i) {
-			if (NULL != (page = vsg->pages[i])) {
-				if (!PageReserved(page) && (DMA_FROM_DEVICE == vsg->direction))
-					SetPageDirty(page);
-				page_cache_release(page);
-			}
-		}
-	case dr_via_pages_alloc:
-		vfree(vsg->pages);
-	default:
-		vsg->state = dr_via_sg_init;
-	}
-	vfree(vsg->bounce_buffer);
-	vsg->bounce_buffer = NULL;
-	vsg->free_on_sequence = 0;
-}
-
-/*
- * Fire a blit engine.
- */
-
-static void
-via_fire_dmablit(struct drm_device *dev, drm_via_sg_info_t *vsg, int engine)
-{
-	drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-
-	VIA_WRITE(VIA_PCI_DMA_MAR0 + engine*0x10, 0);
-	VIA_WRITE(VIA_PCI_DMA_DAR0 + engine*0x10, 0);
-	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_DD | VIA_DMA_CSR_TD |
-		  VIA_DMA_CSR_DE);
-	VIA_WRITE(VIA_PCI_DMA_MR0  + engine*0x04, VIA_DMA_MR_CM | VIA_DMA_MR_TDIE);
-	VIA_WRITE(VIA_PCI_DMA_BCR0 + engine*0x10, 0);
-	VIA_WRITE(VIA_PCI_DMA_DPR0 + engine*0x10, vsg->chain_start);
-	DRM_WRITEMEMORYBARRIER();
-	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_DE | VIA_DMA_CSR_TS);
-	VIA_READ(VIA_PCI_DMA_CSR0 + engine*0x04);
-}
-
-/*
- * Obtain a page pointer array and lock all pages into system memory. A segmentation violation will
- * occur here if the calling user does not have access to the submitted address.
- */
-
-static int
-via_lock_all_dma_pages(drm_via_sg_info_t *vsg,  drm_via_dmablit_t *xfer)
-{
-	int ret;
-	unsigned long first_pfn = VIA_PFN(xfer->mem_addr);
-	vsg->num_pages = VIA_PFN(xfer->mem_addr + (xfer->num_lines * xfer->mem_stride - 1)) -
-		first_pfn + 1;
-
-	vsg->pages = vzalloc(sizeof(struct page *) * vsg->num_pages);
-	if (NULL == vsg->pages)
-		return -ENOMEM;
-	down_read(&current->mm->mmap_sem);
-	ret = get_user_pages(current, current->mm,
-			     (unsigned long)xfer->mem_addr,
-			     vsg->num_pages,
-			     (vsg->direction == DMA_FROM_DEVICE),
-			     0, vsg->pages, NULL);
-
-	up_read(&current->mm->mmap_sem);
-	if (ret != vsg->num_pages) {
-		if (ret < 0)
-			return ret;
-		vsg->state = dr_via_pages_locked;
-		return -EINVAL;
-	}
-	vsg->state = dr_via_pages_locked;
-	DRM_DEBUG("DMA pages locked\n");
-	return 0;
-}
-
-/*
- * Allocate DMA capable memory for the blit descriptor chain, and an array that keeps track of the
- * pages we allocate. We don't want to use kmalloc for the descriptor chain because it may be
- * quite large for some blits, and pages don't need to be contingous.
- */
-
-static int
-via_alloc_desc_pages(drm_via_sg_info_t *vsg)
-{
-	int i;
-
-	vsg->descriptors_per_page = PAGE_SIZE / sizeof(drm_via_descriptor_t);
-	vsg->num_desc_pages = (vsg->num_desc + vsg->descriptors_per_page - 1) /
-		vsg->descriptors_per_page;
-
-	if (NULL ==  (vsg->desc_pages = kcalloc(vsg->num_desc_pages, sizeof(void *), GFP_KERNEL)))
-		return -ENOMEM;
-
-	vsg->state = dr_via_desc_pages_alloc;
-	for (i = 0; i < vsg->num_desc_pages; ++i) {
-		if (NULL == (vsg->desc_pages[i] =
-			     (drm_via_descriptor_t *) __get_free_page(GFP_KERNEL)))
-			return -ENOMEM;
-	}
-	DRM_DEBUG("Allocated %d pages for %d descriptors.\n", vsg->num_desc_pages,
-		  vsg->num_desc);
-	return 0;
-}
-
-static void
-via_abort_dmablit(struct drm_device *dev, int engine)
-{
-	drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-
-	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_TA);
-}
-
-static void
-via_dmablit_engine_off(struct drm_device *dev, int engine)
-{
-	drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-
-	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_TD | VIA_DMA_CSR_DD);
-}
-
-
-
-/*
- * The dmablit part of the IRQ handler. Trying to do only reasonably fast things here.
- * The rest, like unmapping and freeing memory for done blits is done in a separate workqueue
- * task. Basically the task of the interrupt handler is to submit a new blit to the engine, while
- * the workqueue task takes care of processing associated with the old blit.
- */
-
-void
-via_dmablit_handler(struct drm_device *dev, int engine, int from_irq)
-{
-	drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-	drm_via_blitq_t *blitq = dev_priv->blit_queues + engine;
-	int cur;
-	int done_transfer;
-	unsigned long irqsave = 0;
-	uint32_t status = 0;
-
-	DRM_DEBUG("DMA blit handler called. engine = %d, from_irq = %d, blitq = 0x%lx\n",
-		  engine, from_irq, (unsigned long) blitq);
-
-	if (from_irq)
-		spin_lock(&blitq->blit_lock);
-	else
-		spin_lock_irqsave(&blitq->blit_lock, irqsave);
-
-	done_transfer = blitq->is_active &&
-	  ((status = VIA_READ(VIA_PCI_DMA_CSR0 + engine*0x04)) & VIA_DMA_CSR_TD);
-	done_transfer = done_transfer || (blitq->aborting && !(status & VIA_DMA_CSR_DE));
-
-	cur = blitq->cur;
-	if (done_transfer) {
-
-		blitq->blits[cur]->aborted = blitq->aborting;
-		blitq->done_blit_handle++;
-		DRM_WAKEUP(blitq->blit_queue + cur);
-
-		cur++;
-		if (cur >= VIA_NUM_BLIT_SLOTS)
-			cur = 0;
-		blitq->cur = cur;
-
-		/*
-		 * Clear transfer done flag.
-		 */
-
-		VIA_WRITE(VIA_PCI_DMA_CSR0 + engine*0x04,  VIA_DMA_CSR_TD);
-
-		blitq->is_active = 0;
-		blitq->aborting = 0;
-		schedule_work(&blitq->wq);
-
-	} else if (blitq->is_active && time_after_eq(jiffies, blitq->end)) {
-
-		/*
-		 * Abort transfer after one second.
-		 */
-
-		via_abort_dmablit(dev, engine);
-		blitq->aborting = 1;
-		blitq->end = jiffies + DRM_HZ;
-	}
-
-	if (!blitq->is_active) {
-		if (blitq->num_outstanding) {
-			via_fire_dmablit(dev, blitq->blits[cur], engine);
-			blitq->is_active = 1;
-			blitq->cur = cur;
-			blitq->num_outstanding--;
-			blitq->end = jiffies + DRM_HZ;
-			if (!timer_pending(&blitq->poll_timer))
-				mod_timer(&blitq->poll_timer, jiffies + 1);
-		} else {
-			if (timer_pending(&blitq->poll_timer))
-				del_timer(&blitq->poll_timer);
-			via_dmablit_engine_off(dev, engine);
-		}
-	}
-
-	if (from_irq)
-		spin_unlock(&blitq->blit_lock);
-	else
-		spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-}
-
-
-
-/*
- * Check whether this blit is still active, performing necessary locking.
- */
-
-static int
-via_dmablit_active(drm_via_blitq_t *blitq, int engine, uint32_t handle, wait_queue_head_t **queue)
-{
-	unsigned long irqsave;
-	uint32_t slot;
-	int active;
-
-	spin_lock_irqsave(&blitq->blit_lock, irqsave);
-
-	/*
-	 * Allow for handle wraparounds.
-	 */
-
-	active = ((blitq->done_blit_handle - handle) > (1 << 23)) &&
-		((blitq->cur_blit_handle - handle) <= (1 << 23));
-
-	if (queue && active) {
-		slot = handle - blitq->done_blit_handle + blitq->cur - 1;
-		if (slot >= VIA_NUM_BLIT_SLOTS)
-			slot -= VIA_NUM_BLIT_SLOTS;
-		*queue = blitq->blit_queue + slot;
-	}
-
-	spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-
-	return active;
-}
-
-/*
- * Sync. Wait for at least three seconds for the blit to be performed.
- */
-
-static int
-via_dmablit_sync(struct drm_device *dev, uint32_t handle, int engine)
-{
-
-	drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-	drm_via_blitq_t *blitq = dev_priv->blit_queues + engine;
-	wait_queue_head_t *queue;
-	int ret = 0;
-
-	if (via_dmablit_active(blitq, engine, handle, &queue)) {
-		DRM_WAIT_ON(ret, *queue, 3 * DRM_HZ,
-			    !via_dmablit_active(blitq, engine, handle, NULL));
-	}
-	DRM_DEBUG("DMA blit sync handle 0x%x engine %d returned %d\n",
-		  handle, engine, ret);
-
-	return ret;
-}
-
-
-/*
- * A timer that regularly polls the blit engine in cases where we don't have interrupts:
- * a) Broken hardware (typically those that don't have any video capture facility).
- * b) Blit abort. The hardware doesn't send an interrupt when a blit is aborted.
- * The timer and hardware IRQ's can and do work in parallel. If the hardware has
- * irqs, it will shorten the latency somewhat.
- */
-
-
-
-static void
-via_dmablit_timer(unsigned long data)
-{
-	drm_via_blitq_t *blitq = (drm_via_blitq_t *) data;
-	struct drm_device *dev = blitq->dev;
-	int engine = (int)
-		(blitq - ((drm_via_private_t *)dev->dev_private)->blit_queues);
-
-	DRM_DEBUG("Polling timer called for engine %d, jiffies %lu\n", engine,
-		  (unsigned long) jiffies);
-
-	via_dmablit_handler(dev, engine, 0);
-
-	if (!timer_pending(&blitq->poll_timer)) {
-		mod_timer(&blitq->poll_timer, jiffies + 1);
-
-	       /*
-		* Rerun handler to delete timer if engines are off, and
-		* to shorten abort latency. This is a little nasty.
-		*/
-
-	       via_dmablit_handler(dev, engine, 0);
-
-	}
-}
-
-
-
-
-/*
- * Workqueue task that frees data and mappings associated with a blit.
- * Also wakes up waiting processes. Each of these tasks handles one
- * blit engine only and may not be called on each interrupt.
- */
-
-
-static void
-via_dmablit_workqueue(struct work_struct *work)
-{
-	drm_via_blitq_t *blitq = container_of(work, drm_via_blitq_t, wq);
-	struct drm_device *dev = blitq->dev;
-	unsigned long irqsave;
-	drm_via_sg_info_t *cur_sg;
-	int cur_released;
-
-
-	DRM_DEBUG("Workqueue task called for blit engine %ld\n", (unsigned long)
-		  (blitq - ((drm_via_private_t *)dev->dev_private)->blit_queues));
-
-	spin_lock_irqsave(&blitq->blit_lock, irqsave);
-
-	while (blitq->serviced != blitq->cur) {
-
-		cur_released = blitq->serviced++;
-
-		DRM_DEBUG("Releasing blit slot %d\n", cur_released);
-
-		if (blitq->serviced >= VIA_NUM_BLIT_SLOTS)
-			blitq->serviced = 0;
-
-		cur_sg = blitq->blits[cur_released];
-		blitq->num_free++;
-
-		spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-
-		DRM_WAKEUP(&blitq->busy_queue);
-
-		via_free_sg_info(dev->pdev, cur_sg);
-		kfree(cur_sg);
-
-		spin_lock_irqsave(&blitq->blit_lock, irqsave);
-	}
-
-	spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-}
-
-
-/*
- * Init all blit engines. Currently we use two, but some hardware have 4.
- */
-
-
-void
-via_init_dmablit(struct drm_device *dev)
-{
-	int i, j;
-	drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-	drm_via_blitq_t *blitq;
-
-	pci_set_master(dev->pdev);
-
-	for (i = 0; i < VIA_NUM_BLIT_ENGINES; ++i) {
-		blitq = dev_priv->blit_queues + i;
-		blitq->dev = dev;
-		blitq->cur_blit_handle = 0;
-		blitq->done_blit_handle = 0;
-		blitq->head = 0;
-		blitq->cur = 0;
-		blitq->serviced = 0;
-		blitq->num_free = VIA_NUM_BLIT_SLOTS - 1;
-		blitq->num_outstanding = 0;
-		blitq->is_active = 0;
-		blitq->aborting = 0;
-		spin_lock_init(&blitq->blit_lock);
-		for (j = 0; j < VIA_NUM_BLIT_SLOTS; ++j)
-			DRM_INIT_WAITQUEUE(blitq->blit_queue + j);
-		DRM_INIT_WAITQUEUE(&blitq->busy_queue);
-		INIT_WORK(&blitq->wq, via_dmablit_workqueue);
-		setup_timer(&blitq->poll_timer, via_dmablit_timer,
-				(unsigned long)blitq);
-	}
-}
-
-/*
- * Build all info and do all mappings required for a blit.
- */
-
-
-static int
-via_build_sg_info(struct drm_device *dev, drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer)
-{
-	int draw = xfer->to_fb;
-	int ret = 0;
-
-	vsg->direction = (draw) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
-	vsg->bounce_buffer = NULL;
-
-	vsg->state = dr_via_sg_init;
-
-	if (xfer->num_lines <= 0 || xfer->line_length <= 0) {
-		DRM_ERROR("Zero size bitblt.\n");
-		return -EINVAL;
-	}
-
-	/*
-	 * Below check is a driver limitation, not a hardware one. We
-	 * don't want to lock unused pages, and don't want to incoporate the
-	 * extra logic of avoiding them. Make sure there are no.
-	 * (Not a big limitation anyway.)
-	 */
-
-	if ((xfer->mem_stride - xfer->line_length) > 2*PAGE_SIZE) {
-		DRM_ERROR("Too large system memory stride. Stride: %d, "
-			  "Length: %d\n", xfer->mem_stride, xfer->line_length);
-		return -EINVAL;
-	}
-
-	if ((xfer->mem_stride == xfer->line_length) &&
-	   (xfer->fb_stride == xfer->line_length)) {
-		xfer->mem_stride *= xfer->num_lines;
-		xfer->line_length = xfer->mem_stride;
-		xfer->fb_stride = xfer->mem_stride;
-		xfer->num_lines = 1;
-	}
-
-	/*
-	 * Don't lock an arbitrary large number of pages, since that causes a
-	 * DOS security hole.
-	 */
-
-	if (xfer->num_lines > 2048 || (xfer->num_lines*xfer->mem_stride > (2048*2048*4))) {
-		DRM_ERROR("Too large PCI DMA bitblt.\n");
-		return -EINVAL;
-	}
-
-	/*
-	 * we allow a negative fb stride to allow flipping of images in
-	 * transfer.
-	 */
-
-	if (xfer->mem_stride < xfer->line_length ||
-		abs(xfer->fb_stride) < xfer->line_length) {
-		DRM_ERROR("Invalid frame-buffer / memory stride.\n");
-		return -EINVAL;
-	}
-
-	/*
-	 * A hardware bug seems to be worked around if system memory addresses start on
-	 * 16 byte boundaries. This seems a bit restrictive however. VIA is contacted
-	 * about this. Meanwhile, impose the following restrictions:
-	 */
-
-#ifdef VIA_BUGFREE
-	if ((((unsigned long)xfer->mem_addr & 3) != ((unsigned long)xfer->fb_addr & 3)) ||
-	    ((xfer->num_lines > 1) && ((xfer->mem_stride & 3) != (xfer->fb_stride & 3)))) {
-		DRM_ERROR("Invalid DRM bitblt alignment.\n");
-		return -EINVAL;
-	}
-#else
-	if ((((unsigned long)xfer->mem_addr & 15) ||
-	      ((unsigned long)xfer->fb_addr & 3)) ||
-	   ((xfer->num_lines > 1) &&
-	   ((xfer->mem_stride & 15) || (xfer->fb_stride & 3)))) {
-		DRM_ERROR("Invalid DRM bitblt alignment.\n");
-		return -EINVAL;
-	}
-#endif
-
-	if (0 != (ret = via_lock_all_dma_pages(vsg, xfer))) {
-		DRM_ERROR("Could not lock DMA pages.\n");
-		via_free_sg_info(dev->pdev, vsg);
-		return ret;
-	}
-
-	via_map_blit_for_device(dev->pdev, xfer, vsg, 0);
-	if (0 != (ret = via_alloc_desc_pages(vsg))) {
-		DRM_ERROR("Could not allocate DMA descriptor pages.\n");
-		via_free_sg_info(dev->pdev, vsg);
-		return ret;
-	}
-	via_map_blit_for_device(dev->pdev, xfer, vsg, 1);
-
-	return 0;
-}
-
-
-/*
- * Reserve one free slot in the blit queue. Will wait for one second for one
- * to become available. Otherwise -EBUSY is returned.
- */
-
-static int
-via_dmablit_grab_slot(drm_via_blitq_t *blitq, int engine)
-{
-	int ret = 0;
-	unsigned long irqsave;
-
-	DRM_DEBUG("Num free is %d\n", blitq->num_free);
-	spin_lock_irqsave(&blitq->blit_lock, irqsave);
-	while (blitq->num_free == 0) {
-		spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-
-		DRM_WAIT_ON(ret, blitq->busy_queue, DRM_HZ, blitq->num_free > 0);
-		if (ret)
-			return (-EINTR == ret) ? -EAGAIN : ret;
-
-		spin_lock_irqsave(&blitq->blit_lock, irqsave);
-	}
-
-	blitq->num_free--;
-	spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-
-	return 0;
-}
-
-/*
- * Hand back a free slot if we changed our mind.
- */
-
-static void
-via_dmablit_release_slot(drm_via_blitq_t *blitq)
-{
-	unsigned long irqsave;
-
-	spin_lock_irqsave(&blitq->blit_lock, irqsave);
-	blitq->num_free++;
-	spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-	DRM_WAKEUP(&blitq->busy_queue);
-}
-
-/*
- * Grab a free slot. Build blit info and queue a blit.
- */
-
-
-static int
-via_dmablit(struct drm_device *dev, drm_via_dmablit_t *xfer)
-{
-	drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-	drm_via_sg_info_t *vsg;
-	drm_via_blitq_t *blitq;
-	int ret;
-	int engine;
-	unsigned long irqsave;
-
-	if (dev_priv == NULL) {
-		DRM_ERROR("Called without initialization.\n");
-		return -EINVAL;
-	}
-
-	engine = (xfer->to_fb) ? 0 : 1;
-	blitq = dev_priv->blit_queues + engine;
-	if (0 != (ret = via_dmablit_grab_slot(blitq, engine)))
-		return ret;
-	if (NULL == (vsg = kmalloc(sizeof(*vsg), GFP_KERNEL))) {
-		via_dmablit_release_slot(blitq);
-		return -ENOMEM;
-	}
-	if (0 != (ret = via_build_sg_info(dev, vsg, xfer))) {
-		via_dmablit_release_slot(blitq);
-		kfree(vsg);
-		return ret;
-	}
-	spin_lock_irqsave(&blitq->blit_lock, irqsave);
-
-	blitq->blits[blitq->head++] = vsg;
-	if (blitq->head >= VIA_NUM_BLIT_SLOTS)
-		blitq->head = 0;
-	blitq->num_outstanding++;
-	xfer->sync.sync_handle = ++blitq->cur_blit_handle;
-
-	spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-	xfer->sync.engine = engine;
-
-	via_dmablit_handler(dev, engine, 0);
-
-	return 0;
-}
-
-/*
- * Sync on a previously submitted blit. Note that the X server use signals extensively, and
- * that there is a very big probability that this IOCTL will be interrupted by a signal. In that
- * case it returns with -EAGAIN for the signal to be delivered.
- * The caller should then reissue the IOCTL. This is similar to what is being done for drmGetLock().
- */
-
-int
-via_dma_blit_sync(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-	drm_via_blitsync_t *sync = data;
-	int err;
-
-	if (sync->engine >= VIA_NUM_BLIT_ENGINES)
-		return -EINVAL;
-
-	err = via_dmablit_sync(dev, sync->sync_handle, sync->engine);
-
-	if (-EINTR == err)
-		err = -EAGAIN;
-
-	return err;
-}
-
-
-/*
- * Queue a blit and hand back a handle to be used for sync. This IOCTL may be interrupted by a signal
- * while waiting for a free slot in the blit queue. In that case it returns with -EAGAIN and should
- * be reissued. See the above IOCTL code.
- */
-
-int
-via_dma_blit(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-	drm_via_dmablit_t *xfer = data;
-	int err;
-
-	err = via_dmablit(dev, xfer);
-
-	return err;
-}
diff --git a/drivers/gpu/drm/via/via_dmablit.h b/drivers/gpu/drm/via/via_dmablit.h
deleted file mode 100644
index 9b662a3..0000000
--- a/drivers/gpu/drm/via/via_dmablit.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/* via_dmablit.h -- PCI DMA BitBlt support for the VIA Unichrome/Pro
- *
- * Copyright 2005 Thomas Hellstrom.
- * 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:
- *    Thomas Hellstrom.
- *    Register info from Digeo Inc.
- */
-
-#ifndef _VIA_DMABLIT_H
-#define _VIA_DMABLIT_H
-
-#include <linux/dma-mapping.h>
-
-#define VIA_NUM_BLIT_ENGINES 2
-#define VIA_NUM_BLIT_SLOTS 8
-
-struct _drm_via_descriptor;
-
-typedef struct _drm_via_sg_info {
-	struct page **pages;
-	unsigned long num_pages;
-	struct _drm_via_descriptor **desc_pages;
-	int num_desc_pages;
-	int num_desc;
-	enum dma_data_direction direction;
-	unsigned char *bounce_buffer;
-	dma_addr_t chain_start;
-	uint32_t free_on_sequence;
-	unsigned int descriptors_per_page;
-	int aborted;
-	enum {
-		dr_via_device_mapped,
-		dr_via_desc_pages_alloc,
-		dr_via_pages_locked,
-		dr_via_pages_alloc,
-		dr_via_sg_init
-	} state;
-} drm_via_sg_info_t;
-
-typedef struct _drm_via_blitq {
-	struct drm_device *dev;
-	uint32_t cur_blit_handle;
-	uint32_t done_blit_handle;
-	unsigned serviced;
-	unsigned head;
-	unsigned cur;
-	unsigned num_free;
-	unsigned num_outstanding;
-	unsigned long end;
-	int aborting;
-	int is_active;
-	drm_via_sg_info_t *blits[VIA_NUM_BLIT_SLOTS];
-	spinlock_t blit_lock;
-	wait_queue_head_t blit_queue[VIA_NUM_BLIT_SLOTS];
-	wait_queue_head_t busy_queue;
-	struct work_struct wq;
-	struct timer_list poll_timer;
-} drm_via_blitq_t;
-
-
-/*
- *  PCI DMA Registers
- *  Channels 2 & 3 don't seem to be implemented in hardware.
- */
-
-#define VIA_PCI_DMA_MAR0            0xE40   /* Memory Address Register of Channel 0 */
-#define VIA_PCI_DMA_DAR0            0xE44   /* Device Address Register of Channel 0 */
-#define VIA_PCI_DMA_BCR0            0xE48   /* Byte Count Register of Channel 0 */
-#define VIA_PCI_DMA_DPR0            0xE4C   /* Descriptor Pointer Register of Channel 0 */
-
-#define VIA_PCI_DMA_MAR1            0xE50   /* Memory Address Register of Channel 1 */
-#define VIA_PCI_DMA_DAR1            0xE54   /* Device Address Register of Channel 1 */
-#define VIA_PCI_DMA_BCR1            0xE58   /* Byte Count Register of Channel 1 */
-#define VIA_PCI_DMA_DPR1            0xE5C   /* Descriptor Pointer Register of Channel 1 */
-
-#define VIA_PCI_DMA_MAR2            0xE60   /* Memory Address Register of Channel 2 */
-#define VIA_PCI_DMA_DAR2            0xE64   /* Device Address Register of Channel 2 */
-#define VIA_PCI_DMA_BCR2            0xE68   /* Byte Count Register of Channel 2 */
-#define VIA_PCI_DMA_DPR2            0xE6C   /* Descriptor Pointer Register of Channel 2 */
-
-#define VIA_PCI_DMA_MAR3            0xE70   /* Memory Address Register of Channel 3 */
-#define VIA_PCI_DMA_DAR3            0xE74   /* Device Address Register of Channel 3 */
-#define VIA_PCI_DMA_BCR3            0xE78   /* Byte Count Register of Channel 3 */
-#define VIA_PCI_DMA_DPR3            0xE7C   /* Descriptor Pointer Register of Channel 3 */
-
-#define VIA_PCI_DMA_MR0             0xE80   /* Mode Register of Channel 0 */
-#define VIA_PCI_DMA_MR1             0xE84   /* Mode Register of Channel 1 */
-#define VIA_PCI_DMA_MR2             0xE88   /* Mode Register of Channel 2 */
-#define VIA_PCI_DMA_MR3             0xE8C   /* Mode Register of Channel 3 */
-
-#define VIA_PCI_DMA_CSR0            0xE90   /* Command/Status Register of Channel 0 */
-#define VIA_PCI_DMA_CSR1            0xE94   /* Command/Status Register of Channel 1 */
-#define VIA_PCI_DMA_CSR2            0xE98   /* Command/Status Register of Channel 2 */
-#define VIA_PCI_DMA_CSR3            0xE9C   /* Command/Status Register of Channel 3 */
-
-#define VIA_PCI_DMA_PTR             0xEA0   /* Priority Type Register */
-
-/* Define for DMA engine */
-/* DPR */
-#define VIA_DMA_DPR_EC		(1<<1)	/* end of chain */
-#define VIA_DMA_DPR_DDIE	(1<<2)	/* descriptor done interrupt enable */
-#define VIA_DMA_DPR_DT		(1<<3)	/* direction of transfer (RO) */
-
-/* MR */
-#define VIA_DMA_MR_CM		(1<<0)	/* chaining mode */
-#define VIA_DMA_MR_TDIE		(1<<1)	/* transfer done interrupt enable */
-#define VIA_DMA_MR_HENDMACMD		(1<<7) /* ? */
-
-/* CSR */
-#define VIA_DMA_CSR_DE		(1<<0)	/* DMA enable */
-#define VIA_DMA_CSR_TS		(1<<1)	/* transfer start */
-#define VIA_DMA_CSR_TA		(1<<2)	/* transfer abort */
-#define VIA_DMA_CSR_TD		(1<<3)	/* transfer done */
-#define VIA_DMA_CSR_DD		(1<<4)	/* descriptor done */
-#define VIA_DMA_DPR_EC          (1<<1)  /* end of chain */
-
-
-
-#endif
diff --git a/drivers/gpu/drm/via/via_h1_cmdbuf.c b/drivers/gpu/drm/via/via_h1_cmdbuf.c
new file mode 100644
index 0000000..c235e2a
--- /dev/null
+++ b/drivers/gpu/drm/via/via_h1_cmdbuf.c
@@ -0,0 +1,667 @@
+/* via_h1_cmdbuf.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 <drm/drmP.h>
+#include "via_drv.h"
+#include "via_3d_reg.h"
+
+#define CMDBUF_ALIGNMENT_SIZE   (0x100)
+#define CMDBUF_ALIGNMENT_MASK   (0x0ff)
+
+static void via_cmdbuf_start(struct drm_via_private *dev_priv);
+static void via_cmdbuf_pause(struct drm_via_private *dev_priv);
+static void via_cmdbuf_reset(struct drm_via_private *dev_priv);
+static void via_cmdbuf_rewind(struct drm_via_private *dev_priv);
+static void via_pad_cache(struct drm_via_private *dev_priv, int qwords);
+
+/*
+ * Free space in command buffer.
+ */
+
+static uint32_t via_cmdbuf_space(struct drm_via_private *dev_priv)
+{
+	uint32_t gart_base = dev_priv->dma_offset;
+	uint32_t hw_addr = ioread32(dev_priv->hw_addr_ptr) - gart_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(struct drm_via_private *dev_priv)
+{
+	uint32_t gart_base = dev_priv->dma_offset;
+	uint32_t hw_addr = ioread32(dev_priv->hw_addr_ptr) - gart_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(struct drm_via_private *dev_priv, unsigned int size)
+{
+	uint32_t gart_base = dev_priv->dma_offset;
+	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 - gart_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;
+		}
+		if  ((cur_addr < hw_addr) && (next_addr >= hw_addr))
+			msleep(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(struct drm_via_private * 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->dmabuf.virtual + dev_priv->dma_low);
+}
+
+int via_dma_cleanup(struct drm_device *dev)
+{
+	if (dev->dev_private) {
+		struct drm_via_private *dev_priv = dev->dev_private;
+
+		if (dev_priv->dmabuf.virtual) {
+			struct ttm_buffer_object *bo = dev_priv->dmabuf.bo;
+
+			via_cmdbuf_reset(dev_priv);
+
+			ttm_bo_unpin(bo, &dev_priv->dmabuf);
+			ttm_bo_unref(&bo);
+			dev_priv->dmabuf.virtual = NULL;
+		}
+	}
+	return 0;
+}
+
+static int via_initialize(struct drm_device *dev,
+			  struct drm_via_private *dev_priv,
+			  drm_via_dma_init_t *init)
+{
+	struct ttm_buffer_object *bo;
+	int ret = -EFAULT;
+
+	if (!dev_priv) {
+		DRM_ERROR("via_dma_init called before via_map_init\n");
+		return ret;
+	}
+
+	if (dev_priv->dmabuf.virtual != NULL) {
+		DRM_ERROR("called again without calling cleanup\n");
+		return ret;
+	}
+
+	ret = ttm_bo_allocate(&dev_priv->bdev, init->size, ttm_bo_type_kernel,
+				TTM_PL_FLAG_TT, VIA_MM_ALIGN_SIZE, PAGE_SIZE,
+				false, NULL, NULL, &bo);
+	if (!ret) {
+		ret = ttm_bo_pin(bo, &dev_priv->dmabuf);
+		if (ret)
+			goto out_err;
+	}
+
+	dev_priv->dma_low = 0;
+	dev_priv->dma_high = bo->num_pages << PAGE_SHIFT;
+	dev_priv->dma_wrap = dev_priv->dma_high;
+	dev_priv->dma_offset = bo->offset;
+	dev_priv->last_pause_ptr = NULL;
+	dev_priv->hw_addr_ptr =
+		(void *)(dev_priv->mmio.virtual + init->reg_pause_addr);
+
+	via_cmdbuf_start(dev_priv);
+out_err:
+	if (ret)
+		DRM_ERROR("can not ioremap TTM DMA ring buffer\n");
+	return ret;
+}
+
+int via_dma_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+	drm_via_dma_init_t *init = data;
+	int retcode = 0;
+
+	switch (init->func) {
+	case VIA_INIT_DMA:
+		if (!DRM_SUSER(DRM_CURPROC))
+			retcode = -EPERM;
+		else
+			retcode = via_initialize(dev, dev_priv, init);
+		break;
+	case VIA_CLEANUP_DMA:
+		if (!DRM_SUSER(DRM_CURPROC))
+			retcode = -EPERM;
+		else
+			retcode = via_dma_cleanup(dev);
+		break;
+	case VIA_DMA_INITIALIZED:
+		retcode = (dev_priv->dmabuf.virtual != NULL) ?
+			0 : -EFAULT;
+		break;
+	default:
+		retcode = -EINVAL;
+		break;
+	}
+
+	return retcode;
+}
+
+int via_dispatch_cmdbuffer(struct drm_device *dev, drm_via_cmdbuffer_t *cmd)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+	uint32_t *vb;
+	int ret;
+
+	if (dev_priv->dmabuf.virtual == NULL) {
+		DRM_ERROR("called without initializing AGP ring buffer.\n");
+		return -EFAULT;
+	}
+
+	if (cmd->size > VIA_PCI_BUF_SIZE)
+		return -ENOMEM;
+
+	if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
+		return -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 -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(struct drm_device *dev)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+
+	if (!via_wait_idle(dev_priv))
+		return -EBUSY;
+	return 0;
+}
+
+int via_flush_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
+
+	return via_driver_dma_quiescent(dev);
+}
+
+int via_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	drm_via_cmdbuffer_t *cmdbuf = data;
+	int ret;
+
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
+
+	DRM_DEBUG("buf %p size %lu\n", cmdbuf->buf, cmdbuf->size);
+
+	ret = via_dispatch_cmdbuffer(dev, cmdbuf);
+	return ret;
+}
+
+static int via_dispatch_pci_cmdbuffer(struct drm_device *dev,
+				      drm_via_cmdbuffer_t *cmd)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+	int ret;
+
+	if (cmd->size > VIA_PCI_BUF_SIZE)
+		return -ENOMEM;
+	if (DRM_COPY_FROM_USER(dev_priv->pci_buf, cmd->buf, cmd->size))
+		return -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(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	drm_via_cmdbuffer_t *cmdbuf = data;
+	int ret;
+
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
+
+	DRM_DEBUG("buf %p size %lu\n", cmdbuf->buf, cmdbuf->size);
+
+	ret = via_dispatch_pci_cmdbuffer(dev, cmdbuf);
+	return ret;
+}
+
+static inline uint32_t *via_align_buffer(struct drm_via_private *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 management code.
+ *
+ * Returns virtual pointer to ring buffer.
+ */
+static inline uint32_t *via_get_dma(struct drm_via_private *dev_priv)
+{
+	return (uint32_t *) (dev_priv->dmabuf.virtual + 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(struct drm_via_private *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;
+	uint32_t reader, ptr;
+	uint32_t diff;
+
+	paused = 0;
+	mb();
+	(void) *(volatile uint32_t *)(via_get_dma(dev_priv) - 1);
+
+	*paused_at = pause_addr_lo;
+	mb();
+	(void) *paused_at;
+
+	reader = ioread32(dev_priv->hw_addr_ptr);
+	ptr = ((volatile void *)paused_at - dev_priv->dmabuf.virtual) +
+		dev_priv->dma_offset + 4;
+
+	dev_priv->last_pause_ptr = via_get_dma(dev_priv) - 1;
+
+	/*
+	 * If there is a possibility that the command reader will
+	 * miss the new pause address and pause on the old one,
+	 * In that case we need to program the new start address
+	 * using PCI.
+	 */
+
+	diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
+	count = 10000000;
+
+	while ((diff < CMDBUF_ALIGNMENT_SIZE) && count--) {
+		paused = (VIA_READ(0x41c) & 0x80000000);
+		if (paused)
+			break;
+		reader = ioread32(dev_priv->hw_addr_ptr);
+		diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
+	}
+
+	paused = VIA_READ(0x41c) & 0x80000000;
+	if (paused && !no_pci_fire) {
+		reader = ioread32(dev_priv->hw_addr_ptr);
+		diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
+		diff &= (dev_priv->dma_high - 1);
+		if (diff != 0 && diff < (dev_priv->dma_high >> 1)) {
+			DRM_ERROR("Paused at incorrect address. "
+				  "0x%08x, 0x%08x 0x%08x\n",
+				  ptr, reader, dev_priv->dma_diff);
+		} else if (diff == 0) {
+			/*
+			 * There is a concern that these writes may stall the PCI bus
+			 * if the GPU is not idle. However, idling the GPU first
+			 * doesn't make a difference.
+			 */
+
+			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);
+			VIA_READ(VIA_REG_TRANSPACE);
+		}
+	}
+	return paused;
+}
+
+int via_wait_idle(struct drm_via_private *dev_priv)
+{
+	int count = 10000000;
+
+	while (!(VIA_READ(VIA_REG_STATUS) & VIA_VR_QUEUE_EMPTY) && --count)
+		;
+
+	while (count && (VIA_READ(VIA_REG_STATUS) &
+			   (VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY |
+			    VIA_3D_ENG_BUSY)))
+		--count;
+	return count;
+}
+
+static uint32_t *via_align_cmd(struct drm_via_private *dev_priv, uint32_t cmd_type,
+			       uint32_t addr, uint32_t *cmd_addr_hi,
+			       uint32_t *cmd_addr_lo, int skip_wait)
+{
+	uint32_t gart_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);
+
+	gart_base = dev_priv->dma_offset;
+	qw_pad_count = (CMDBUF_ALIGNMENT_SIZE >> 3) -
+	    ((dev_priv->dma_low & CMDBUF_ALIGNMENT_MASK) >> 3);
+
+	cmd_addr = (addr) ? addr :
+	    gart_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(struct drm_via_private *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 gart_base;
+	uint32_t ptr;
+	uint32_t reader;
+	int count;
+
+	dev_priv->dma_low = 0;
+
+	gart_base = dev_priv->dma_offset;
+	start_addr = gart_base;
+	end_addr = gart_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;
+
+	mb();
+	(void) *(volatile uint32_t *) 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);
+	wmb();
+	VIA_WRITE(VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK);
+	VIA_READ(VIA_REG_TRANSPACE);
+
+	dev_priv->dma_diff = 0;
+
+	count = 10000000;
+	while (!(VIA_READ(0x41c) & 0x80000000) && count--);
+
+	reader = ioread32(dev_priv->hw_addr_ptr);
+	ptr = ((volatile void *)dev_priv->last_pause_ptr - dev_priv->dmabuf.virtual) +
+	    dev_priv->dma_offset + 4;
+
+	/*
+	 * This is the difference between where we tell the
+	 * command reader to pause and where it actually pauses.
+	 * This differs between hw implementation so we need to
+	 * detect it.
+	 */
+
+	dev_priv->dma_diff = ptr - reader;
+}
+
+static void via_pad_cache(struct drm_via_private *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(struct drm_via_private *dev_priv)
+{
+	uint32_t *vb = via_get_dma(dev_priv);
+	VIA_OUT_RING_H1(0x0C, (0 | (0 << 16)));
+	VIA_OUT_RING_H1(0x10, 0 | (0 << 16));
+	VIA_OUT_RING_H1(0x0, 0x1 | 0x2000 | 0xAA000000);
+}
+
+static void via_cmdbuf_rewind(struct drm_via_private *dev_priv)
+{
+	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;
+
+	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_rewind 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_flush(struct drm_via_private *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(struct drm_via_private *dev_priv)
+{
+	via_cmdbuf_flush(dev_priv, HC_HAGPBpID_PAUSE);
+}
+
+static void via_cmdbuf_reset(struct drm_via_private *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(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+	drm_via_cmdbuf_size_t *d_siz = data;
+	int ret = 0;
+	uint32_t tmp_size, count;
+
+	DRM_DEBUG("\n");
+	LOCK_TEST_WITH_RETURN(dev, file_priv);
+
+	if (dev_priv->dmabuf.virtual == NULL) {
+		DRM_ERROR("called without initializing AGP ring buffer.\n");
+		return -EFAULT;
+	}
+
+	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 = -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 = -EAGAIN;
+		}
+		break;
+	default:
+		ret = -EFAULT;
+	}
+	d_siz->size = tmp_size;
+
+	return ret;
+}
diff --git a/drivers/gpu/drm/via/via_h1_dma.c b/drivers/gpu/drm/via/via_h1_dma.c
new file mode 100644
index 0000000..45c9e6e
--- /dev/null
+++ b/drivers/gpu/drm/via/via_h1_dma.c
@@ -0,0 +1,229 @@
+/* via_h1_dma.c -- PCI DMA BitBlt support for the VIA Unichrome/Pro
+ *
+ * Copyright (C) 2005 Thomas Hellstrom, 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:
+ *    Thomas Hellstrom.
+ *    Partially based on code obtained from Digeo Inc.
+ */
+#include <drm/drmP.h>
+#include "via_drv.h"
+#include "via_dma.h"
+
+/*
+ * Fire a blit engine.
+ */
+static void
+via_h1_fire_dmablit(struct drm_device *dev, struct drm_via_sg_info *vsg, int engine)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+
+	VIA_WRITE(VIA_PCI_DMA_MAR0 + engine * 0x10, 0);
+	VIA_WRITE(VIA_PCI_DMA_DAR0 + engine * 0x10, 0);
+	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine * 0x04, VIA_DMA_CSR_DD | VIA_DMA_CSR_TD |
+		  VIA_DMA_CSR_DE);
+	VIA_WRITE(VIA_PCI_DMA_MR0  + engine * 0x04, VIA_DMA_MR_CM | VIA_DMA_MR_TDIE);
+	VIA_WRITE(VIA_PCI_DMA_BCR0 + engine * 0x10, 0);
+	VIA_WRITE(VIA_PCI_DMA_DPR0 + engine * 0x10, vsg->chain_start);
+	wmb();
+	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine * 0x04, VIA_DMA_CSR_DE | VIA_DMA_CSR_TS);
+	VIA_READ(VIA_PCI_DMA_CSR0  + engine * 0x04);
+}
+
+static void
+via_abort_dmablit(struct drm_device *dev, int engine)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+
+	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine * 0x04, VIA_DMA_CSR_TA);
+}
+
+static void
+via_dmablit_engine_off(struct drm_device *dev, int engine)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+
+	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine * 0x04, VIA_DMA_CSR_TD | VIA_DMA_CSR_DD);
+}
+
+static void
+via_dmablit_done(struct drm_device *dev, int engine)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+
+	/* Clear transfer done flag. */
+	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine * 0x04,  VIA_DMA_CSR_TD);
+}
+
+/*
+ * Unmap a DMA mapping.
+ */
+static void
+via_unmap_from_device(struct drm_device *dev, struct drm_via_sg_info *vsg)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+	int num_desc = vsg->num_desc;
+	unsigned cur_descriptor_page = num_desc / vsg->descriptors_per_page;
+	unsigned descriptor_this_page = num_desc % vsg->descriptors_per_page;
+	dma_addr_t next = vsg->chain_start;
+	struct via_h1_header *desc_ptr;
+
+	desc_ptr = (struct via_h1_header *) vsg->desc_pages[cur_descriptor_page] +
+						descriptor_this_page;
+	while (num_desc--) {
+		if (descriptor_this_page-- == 0) {
+			cur_descriptor_page--;
+			descriptor_this_page = vsg->descriptors_per_page - 1;
+			desc_ptr = (struct via_h1_header *) vsg->desc_pages[cur_descriptor_page] +
+							descriptor_this_page;
+		}
+
+		dma_unmap_single(dev->dev, next, dev_priv->desc_size, DMA_TO_DEVICE);
+		dma_unmap_page(dev->dev, desc_ptr->mem_addr, desc_ptr->size, vsg->direction);
+		next = (dma_addr_t) desc_ptr->next;
+		desc_ptr--;
+	}
+}
+
+/*
+ * Map the DMA pages for the device, put together and map also the descriptors. Descriptors
+ * are run in reverse order by the hardware because we are not allowed to update the
+ * 'next' field without syncing calls when the descriptor is already mapped.
+ */
+static int
+via_map_for_device(struct via_fence_engine *eng, struct drm_via_sg_info *vsg,
+			unsigned long offset)
+{
+	unsigned int num_descriptors_this_page = 0, cur_descriptor_page = 0;
+	unsigned long dev_start = eng->pool->fence_sync.bo->offset;
+	struct device *dev = eng->pool->dev->dev;
+	dma_addr_t next = VIA_DMA_DPR_EC;
+	struct via_h1_header *desc_ptr;
+	struct ttm_tt *ttm = vsg->ttm;
+	int num_desc = 0, ret = 0;
+
+	desc_ptr = (struct via_h1_header *) vsg->desc_pages[cur_descriptor_page];
+	dev_start = vsg->dev_start;
+
+	for (num_desc = 0; num_desc < ttm->num_pages; num_desc++) {
+		/* Map system pages */
+		if (!ttm->pages[num_desc]) {
+			ret = -ENOMEM;
+			goto out;
+		}
+		desc_ptr->mem_addr = dma_map_page(dev, ttm->pages[num_desc], 0,
+						PAGE_SIZE, vsg->direction);
+		desc_ptr->dev_addr = dev_start;
+		/* size count in 16 bytes */
+		desc_ptr->size = PAGE_SIZE / 16;
+		desc_ptr->next = (uint32_t) next;
+
+		/* Map decriptors for Chaining mode */
+		next = dma_map_single(dev, desc_ptr, sizeof(*desc_ptr), DMA_TO_DEVICE);
+		desc_ptr++;
+		if (++num_descriptors_this_page >= vsg->descriptors_per_page) {
+			num_descriptors_this_page = 0;
+			desc_ptr = (struct via_h1_header *) vsg->desc_pages[++cur_descriptor_page];
+		}
+		dev_start += PAGE_SIZE;
+	}
+
+	vsg->chain_start = next;
+	vsg->state = dr_via_device_mapped;
+out:
+	return ret;
+}
+
+/*
+ * Function that frees up all resources for a blit. It is usable even if the
+ * blit info has only been partially built as long as the status enum is consistent
+ * with the actual status of the used resources.
+ */
+static void
+via_free_sg_info(struct via_fence *fence)
+{
+	struct drm_device *dev = fence->pool->dev;
+	struct drm_via_sg_info *vsg = fence->priv;
+	int i;
+
+	switch (vsg->state) {
+	case dr_via_device_mapped:
+		via_unmap_from_device(dev, vsg);
+	case dr_via_desc_pages_alloc:
+		for (i = 0; i < vsg->num_desc_pages; ++i) {
+			if (vsg->desc_pages[i])
+				free_page((unsigned long)vsg->desc_pages[i]);
+		}
+		kfree(vsg->desc_pages);
+	default:
+		vsg->state = dr_via_sg_init;
+	}
+}
+
+static void
+via_h1_dma_fence_signaled(struct via_fence_engine *eng)
+{
+	via_dmablit_done(eng->pool->dev, eng->index);
+}
+
+/*
+ * Build all info and do all mappings required for a blit.
+ */
+static int
+via_h1_dma_emit(struct via_fence *fence)
+{
+	struct via_fence_engine *eng = &fence->pool->engines[fence->engine];
+	unsigned long offset = VIA_FENCE_SIZE * eng->index;
+	struct drm_via_sg_info *vsg = fence->priv;
+	int ret = 0;
+
+	ret = via_map_for_device(eng, vsg, offset);
+	if (!ret) {
+		writel(fence->seq.key, eng->read_seq);
+		via_h1_fire_dmablit(fence->pool->dev, vsg, fence->engine);
+	}
+	return ret;
+}
+
+/*
+ * Init all blit engines. Currently we use two, but some hardware have 4.
+ */
+int
+via_dmablit_init(struct drm_device *dev)
+{
+	struct drm_via_private *dev_priv = dev->dev_private;
+	struct via_fence_pool *pool;
+
+	pci_set_master(dev->pdev);
+
+	pool = via_fence_pool_init(dev, "viadrm_dma", TTM_PL_FLAG_VRAM, 4);
+	if (IS_ERR(pool))
+		return PTR_ERR(pool);
+
+	pool->fence_signaled = via_h1_dma_fence_signaled;
+	pool->fence_cleanup = via_free_sg_info;
+	pool->fence_emit = via_h1_dma_emit;
+
+	dev_priv->dma_fences = pool;
+	dev_priv->desc_size = sizeof(struct via_h1_header);
+	return 0;
+}
