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2007-07-18drm: remove drm_u64_t, replace with uint64_t everwhereDave Airlie
This might break something, stdint.h inclusion in drm.h maybe required but I'm not sure yet what platforms have it what ones don't.
2007-07-11Merge branch 'master' into cleanupDave Airlie
Conflicts: libdrm/xf86drm.c linux-core/drm_bo.c linux-core/drm_fence.c
2007-06-13Fix drmMMUnlock / drmMMLock return values.Thomas Hellstrom
2007-06-12Try to make buffer object / fence object ioctl args 64-bit safe.Thomas Hellstrom
Introduce tile members for future tiled buffer support. Allow user-space to explicitly define a fence-class. Remove the implicit fence-class mechanism. 64-bit wide buffer object flag member.
2007-05-29reformatting, clean-upsBrian
2007-05-29Clean-ups and reformatting.Brian
Use 4-space indentation consistently. Replace occurances of: if (cond) code; with: if (cond) code; to facilitate putting breakpoints on code.
2007-05-26Revert "drm/ttm: cleanup mm_ioctl ioctls to be separate ioctls."Dave Airlie
This reverts commit 3fdef0dc2000308b16907b95f637c60acde80a74. ditto not on master yet
2007-05-26Revert "drm/ttm: cleanup most of fence ioctl split out"Dave Airlie
This reverts commit 3dfc1400e9fc58c69292d7cf7c2e1653fa5e6991. this shouldn't have gone on master yet
2007-05-26drm/ttm: cleanup most of fence ioctl split outDave Airlie
2007-05-26drm/ttm: cleanup mm_ioctl ioctls to be separate ioctls.Dave Airlie
This is the first bunch of ioctls
2007-05-08drm/ttm: ioctl cleanup for buffer object - user side onlyDave Airlie
This just cleans up the xf86drm.c to what I want and drm.h, I need to fix up the kernel internals to suit these changes now. I've moved to using struct instead of typedefs for the bo and it doesn't look that bad so I'll do the same thing for mm and fence..
2007-05-08libdrm: fix typo on ttm fence interfaceDave Airlie
2007-05-06drm/ttm: cleanup most of fence ioctl split outDave Airlie
2007-05-06drm/ttm: cleanup mm_ioctl ioctls to be separate ioctls.Dave Airlie
This is the first bunch of ioctls
2007-05-02Fix buffer object list freeing.Thomas Hellstrom
2007-04-26libdrm: remove HAVE_XORG_CONFIG_H and XFree86LOADER ifdef's.George Sapountzis
We no longer import libdrm in the xserver.
2007-04-16Require the hardware lock for buffer creationThomas Hellstrom
(since that implies a validate). Fix drm_bo_wait_unfenced error messages and codes. Fix some return codes from libdrm.
2007-03-10Merge branch 'i915-pageflip'Michel Dänzer
2007-02-25drm: remove unnecessary NULL checks, and fix some indents..Jakob Bornecrantz
2007-02-22Add DRM_VBLANK_FLIP.Michel Dänzer
Used to request that a scheduled buffer swap be done as a flip instead of a blit.
2007-02-16Simple fence object sample driver for via, based on idling the GPU.Thomas Hellstrom
Buffer object driver for via. Some changes to buffer object driver callbacks. Improve fence flushing.
2007-02-15Initial support for fence object classes.Thomas Hellstrom
(Fence objects belonging to different command submission mechanisms).
2006-11-09libdrm: add drmOpenOnce + drmCloseOnce to libdrmDave Airlie
2006-11-08libdrm: add support for server side functionality in libdrmDave Airlie
This adds APIs to allow the X server to use libdrm from the system rather than its own in-built copy.
2006-10-29Minor bugfix, indentation and removal of unnused variables.Thomas Hellstrom
2006-10-27Reserve the new IOCTLs also for *bsd.Thomas Hellstrom
Bump libdrm version number to 2.2.0
2006-10-27Last minute changes to support multi-page size buffer offset alignments.Thomas Hellstrom
This will come in very handy for tiled buffers on intel hardware. Also add some padding to interface structures to allow future binary backwards compatible changes.
2006-10-18Merging drm-ttm-0-2-branchThomas Hellstrom
Conflicts: linux-core/drmP.h linux-core/drm_drv.c linux-core/drm_irq.c linux-core/drm_stub.c shared-core/drm.h shared-core/i915_drv.h shared-core/i915_irq.c
2006-10-17Remove some debugging messages.Thomas Hellstrom
2006-10-17Remove max number of locked pages check and call, sinceThomas Hellstrom
that is now handled by the memory accounting.
2006-10-17Implement mm_lock and mm_unlock functions.Thomas Hellstrom
The mm_lock function is used when leaving vt. It evicts _all_ buffers. Buffers with the DRM_BO_NO_MOVE attribute set will be guaranteed to get the same offset when / if they are rebound.
2006-10-17Extend generality for more memory types.Thomas Hellstrom
Fix up init and destruction code.
2006-10-11Compatibility code for 2.6.15-2.6.18. It is ugly but a little comfort is thatThomas Hellstrom
it will go away in the mainstream kernel. Some bugfixes, mainly in error paths.
2006-10-11Big update:Thomas Hellstrom
Adapt for new functions in the 2.6.19 kernel. Remove the ability to have multiple regions in one TTM. This simplifies a lot of code. Remove the ability to access TTMs from user space. We don't need it anymore without ttm regions. Don't change caching policy for evicted buffers. Instead change it only when the buffer is accessed by the CPU (on the first page fault). This tremendously speeds up eviction rates. Current code is safe for kernels <= 2.6.14. Should also be OK with 2.6.19 and above.
2006-10-02Bug 6242: [mach64] Use private DMA buffers, part #3.George Sapountzis
Add DRM_PCI_BUFFER_RO flag for mapping PCI DMA buffer read-only. An additional flag is needed, since PCI DMA buffers do not have an associated map.
2006-10-02Make the user_token 44-bit for TTMs, and have them occupy a unique file spaceThomas Hellstrom
starting at 0x00100000000. This will hopefully allow us to use unmap_mapping_range(). Note that user-space will need 64-bit file offset support.
2006-09-29Core vsync: Add flag DRM_VBLANK_NEXTONMISS.Michel Dänzer
When this flag is set and the target sequence is missed, wait for the next vertical blank instead of returning immediately. (cherry picked from 89e323e4900af84cc33219ad24eb0b435a039d23 commit)
2006-09-29Add definition of DRM_VBLANK_SECONDARY.Michel Dänzer
(cherry picked from 84b38b63f05e04ade8b1ddfb770047fd86de0d64 commit)
2006-09-29Add support for tracking drawable information to coreMichel Dänzer
Actually make the existing ioctls for adding and removing drawables do something useful, and add another ioctl for the X server to update drawable information. The only kind of drawable information tracked so far is cliprects. (cherry picked from 29598e5253ff5c085ccf63580fd24b84db848424 commit)
2006-09-28Core vsync: Add flag DRM_VBLANK_NEXTONMISS.Michel Dänzer
When this flag is set and the target sequence is missed, wait for the next vertical blank instead of returning immediately.
2006-09-28Add definition of DRM_VBLANK_SECONDARY.Michel Dänzer
2006-09-28Add support for tracking drawable information to coreMichel Dänzer
Actually make the existing ioctls for adding and removing drawables do something useful, and add another ioctl for the X server to update drawable information. The only kind of drawable information tracked so far is cliprects.
2006-09-26Silence valgrind.Thomas Hellstrom
2006-09-20Allow for 64-bit map handles of ttms and buffer objects.Thomas Hellstrom
2006-09-18Alternative implementation of page table zeroing using zap page_range.Thomas Hellstrom
(Disabled for now) Fix bo_wait_idle bug. Remove stray debug message.
2006-09-18More verbose error reporting in some cases.Thomas Hellstrom
Add a buffer object waitIdle user-space function. Fix some names and minor glitches.
2006-09-15Some bugfixes.Thomas Hellstrom
Change the fence object interface somewhat to allow some more flexibility. Make list IOCTLS really restartable. Try to avoid busy-waits in the kernel using immediate return to user-space with an -EAGAIN.
2006-09-12Use lazy fence wait when possible even for RW fences. Saves some CPU.Thomas Hellstrom
Lindent.
2006-09-12More bugfixes.Thomas Hellstrom
Disable the i915 IRQ turnoff for now since it seems to be causing problems.
2006-09-08Various bugfixes.Thomas Hellstrom
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-06 14:59:49 +0000
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/* i810_dma.c -- DMA support for the i810 -*- linux-c -*-
 * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * PRECISION INSIGHT 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: Rickard E. (Rik) Faith <faith@valinux.com>
 *	    Jeff Hartmann <jhartmann@valinux.com>
 *          Keith Whitwell <keith@tungstengraphics.com>
 *
 */

#include <linux/interrupt.h>	/* For task queue support */
#include <linux/delay.h>
#include <linux/pagemap.h>

#include "drmP.h"
#include "drm.h"
#include "i810_drm.h"
#include "i810_drv.h"

#define I810_BUF_FREE		2
#define I810_BUF_CLIENT		1
#define I810_BUF_HARDWARE	0

#define I810_BUF_UNMAPPED 0
#define I810_BUF_MAPPED   1

static inline void i810_print_status_page(struct drm_device * dev)
{
	struct drm_device_dma *dma = dev->dma;
	drm_i810_private_t *dev_priv = dev->dev_private;
	u32 *temp = dev_priv->hw_status_page;
	int i;

	DRM_DEBUG("hw_status: Interrupt Status : %x\n", temp[0]);
	DRM_DEBUG("hw_status: LpRing Head ptr : %x\n", temp[1]);
	DRM_DEBUG("hw_status: IRing Head ptr : %x\n", temp[2]);
	DRM_DEBUG("hw_status: Reserved : %x\n", temp[3]);
	DRM_DEBUG("hw_status: Last Render: %x\n", temp[4]);
	DRM_DEBUG("hw_status: Driver Counter : %d\n", temp[5]);
	for (i = 6; i < dma->buf_count + 6; i++) {
		DRM_DEBUG("buffer status idx : %d used: %d\n", i - 6, temp[i]);
	}
}

static struct drm_buf *i810_freelist_get(struct drm_device * dev)
{
	struct drm_device_dma *dma = dev->dma;
	int i;
	int used;

	/* Linear search might not be the best solution */

	for (i = 0; i < dma->buf_count; i++) {
		struct drm_buf *buf = dma->buflist[i];
		drm_i810_buf_priv_t *buf_priv = buf->dev_private;
		/* In use is already a pointer */
		used = cmpxchg(buf_priv->in_use, I810_BUF_FREE,
			       I810_BUF_CLIENT);
		if (used == I810_BUF_FREE) {
			return buf;
		}
	}
	return NULL;
}

/* This should only be called if the buffer is not sent to the hardware
 * yet, the hardware updates in use for us once its on the ring buffer.
 */

static int i810_freelist_put(struct drm_device * dev, struct drm_buf * buf)
{
	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
	int used;

	/* In use is already a pointer */
	used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_FREE);
	if (used != I810_BUF_CLIENT) {
		DRM_ERROR("Freeing buffer thats not in use : %d\n", buf->idx);
		return -EINVAL;
	}

	return 0;
}

static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
{
	struct drm_file *priv = filp->private_data;
	struct drm_device *dev;
	drm_i810_private_t *dev_priv;
	struct drm_buf *buf;
	drm_i810_buf_priv_t *buf_priv;

	lock_kernel();
	dev = priv->minor->dev;
	dev_priv = dev->dev_private;
	buf = dev_priv->mmap_buffer;
	buf_priv = buf->dev_private;

	vma->vm_flags |= (VM_IO | VM_DONTCOPY);
	vma->vm_file = filp;

	buf_priv->currently_mapped = I810_BUF_MAPPED;
	unlock_kernel();

	if (io_remap_pfn_range(vma, vma->vm_start,
			       vma->vm_pgoff,
			       vma->vm_end - vma->vm_start, vma->vm_page_prot))
		return -EAGAIN;
	return 0;
}

static const struct file_operations i810_buffer_fops = {
	.open = drm_open,
	.release = drm_release,
	.ioctl = drm_ioctl,
	.mmap = i810_mmap_buffers,
	.fasync = drm_fasync,
};

static int i810_map_buffer(struct drm_buf * buf, struct drm_file *file_priv)
{
	struct drm_device *dev = file_priv->minor->dev;
	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
	drm_i810_private_t *dev_priv = dev->dev_private;
	const struct file_operations *old_fops;
	int retcode = 0;

	if (buf_priv->currently_mapped == I810_BUF_MAPPED)
		return -EINVAL;

	down_write(&current->mm->mmap_sem);
	old_fops = file_priv->filp->f_op;
	file_priv->filp->f_op = &i810_buffer_fops;
	dev_priv->mmap_buffer = buf;
	buf_priv->virtual = (void *)do_mmap(file_priv->filp, 0, buf->total,
					    PROT_READ | PROT_WRITE,
					    MAP_SHARED, buf->bus_address);
	dev_priv->mmap_buffer = NULL;
	file_priv->filp->f_op = old_fops;
	if (IS_ERR(buf_priv->virtual)) {
		/* Real error */
		DRM_ERROR("mmap error\n");
		retcode = PTR_ERR(buf_priv->virtual);
		buf_priv->virtual = NULL;
	}
	up_write(&current->mm->mmap_sem);

	return retcode;
}

static int i810_unmap_buffer(struct drm_buf * buf)
{
	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
	int retcode = 0;

	if (buf_priv->currently_mapped != I810_BUF_MAPPED)
		return -EINVAL;

	down_write(&current->mm->mmap_sem);
	retcode = do_munmap(current->mm,
			    (unsigned long)buf_priv->virtual,
			    (size_t) buf->total);
	up_write(&current->mm->mmap_sem);

	buf_priv->currently_mapped = I810_BUF_UNMAPPED;
	buf_priv->virtual = NULL;

	return retcode;
}

static int i810_dma_get_buffer(struct drm_device * dev, drm_i810_dma_t * d,
			       struct drm_file *file_priv)
{
	struct drm_buf *buf;
	drm_i810_buf_priv_t *buf_priv;
	int retcode = 0;

	buf = i810_freelist_get(dev);
	if (!buf) {
		retcode = -ENOMEM;
		DRM_DEBUG("retcode=%d\n", retcode);
		return retcode;
	}

	retcode = i810_map_buffer(buf, file_priv);
	if (retcode) {
		i810_freelist_put(dev, buf);
		DRM_ERROR("mapbuf failed, retcode %d\n", retcode);
		return retcode;
	}
	buf->file_priv = file_priv;
	buf_priv = buf->dev_private;
	d->granted = 1;
	d->request_idx = buf->idx;
	d->request_size = buf->total;
	d->virtual = buf_priv->virtual;

	return retcode;
}

static int i810_dma_cleanup(struct drm_device * dev)
{
	struct drm_device_dma *dma = dev->dma;

	/* Make sure interrupts are disabled here because the uninstall ioctl
	 * may not have been called from userspace and after dev_private
	 * is freed, it's too late.
	 */
	if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ) && dev->irq_enabled)
		drm_irq_uninstall(dev);

	if (dev->dev_private) {
		int i;
		drm_i810_private_t *dev_priv =
		    (drm_i810_private_t *) dev->dev_private;

		if (dev_priv->ring.virtual_start) {
			drm_core_ioremapfree(&dev_priv->ring.map, dev);
		}
		if (dev_priv->hw_status_page) {
			pci_free_consistent(dev->pdev, PAGE_SIZE,
					    dev_priv->hw_status_page,
					    dev_priv->dma_status_page);
			/* Need to rewrite hardware status page */
			I810_WRITE(0x02080, 0x1ffff000);
		}
		drm_free(dev->dev_private, sizeof(drm_i810_private_t),
			 DRM_MEM_DRIVER);
		dev->dev_private = NULL;

		for (i = 0; i < dma->buf_count; i++) {
			struct drm_buf *buf = dma->buflist[i];
			drm_i810_buf_priv_t *buf_priv = buf->dev_private;

			if (buf_priv->kernel_virtual && buf->total)
				drm_core_ioremapfree(&buf_priv->map, dev);
		}
	}
	return 0;
}

static int i810_wait_ring(struct drm_device * dev, int n)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	drm_i810_ring_buffer_t *ring = &(dev_priv->ring);
	int iters = 0;
	unsigned long end;
	unsigned int last_head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;

	end = jiffies + (HZ * 3);
	while (ring->space < n) {
		ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
		ring->space = ring->head - (ring->tail + 8);
		if (ring->space < 0)
			ring->space += ring->Size;

		if (ring->head != last_head) {
			end = jiffies + (HZ * 3);
			last_head = ring->head;
		}

		iters++;
		if (time_before(end, jiffies)) {
			DRM_ERROR("space: %d wanted %d\n", ring->space, n);
			DRM_ERROR("lockup\n");
			goto out_wait_ring;
		}
		udelay(1);
	}

      out_wait_ring:
	return iters;
}

static void i810_kernel_lost_context(struct drm_device * dev)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	drm_i810_ring_buffer_t *ring = &(dev_priv->ring);

	ring->head = I810_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
	ring->tail = I810_READ(LP_RING + RING_TAIL);
	ring->space = ring->head - (ring->tail + 8);
	if (ring->space < 0)
		ring->space += ring->Size;
}

static int i810_freelist_init(struct drm_device * dev, drm_i810_private_t * dev_priv)
{
	struct drm_device_dma *dma = dev->dma;
	int my_idx = 24;
	u32 *hw_status = (u32 *) (dev_priv->hw_status_page + my_idx);
	int i;

	if (dma->buf_count > 1019) {
		/* Not enough space in the status page for the freelist */
		return -EINVAL;
	}

	for (i = 0; i < dma->buf_count; i++) {
		struct drm_buf *buf = dma->buflist[i];
		drm_i810_buf_priv_t *buf_priv = buf->dev_private;

		buf_priv->in_use = hw_status++;
		buf_priv->my_use_idx = my_idx;
		my_idx += 4;

		*buf_priv->in_use = I810_BUF_FREE;

		buf_priv->map.offset = buf->bus_address;
		buf_priv->map.size = buf->total;
		buf_priv->map.type = _DRM_AGP;
		buf_priv->map.flags = 0;
		buf_priv->map.mtrr = 0;

		drm_core_ioremap(&buf_priv->map, dev);
		buf_priv->kernel_virtual = buf_priv->map.handle;

	}
	return 0;
}

static int i810_dma_initialize(struct drm_device * dev,
			       drm_i810_private_t * dev_priv,
			       drm_i810_init_t * init)
{
	struct drm_map_list *r_list;
	memset(dev_priv, 0, sizeof(drm_i810_private_t));

	list_for_each_entry(r_list, &dev->maplist, head) {
		if (r_list->map &&
		    r_list->map->type == _DRM_SHM &&
		    r_list->map->flags & _DRM_CONTAINS_LOCK) {
			dev_priv->sarea_map = r_list->map;
			break;
		}
	}
	if (!dev_priv->sarea_map) {
		dev->dev_private = (void *)dev_priv;
		i810_dma_cleanup(dev);
		DRM_ERROR("can not find sarea!\n");
		return -EINVAL;
	}
	dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
	if (!dev_priv->mmio_map) {
		dev->dev_private = (void *)dev_priv;
		i810_dma_cleanup(dev);
		DRM_ERROR("can not find mmio map!\n");
		return -EINVAL;
	}
	dev->agp_buffer_token = init->buffers_offset;
	dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
	if (!dev->agp_buffer_map) {
		dev->dev_private = (void *)dev_priv;
		i810_dma_cleanup(dev);
		DRM_ERROR("can not find dma buffer map!\n");
		return -EINVAL;
	}

	dev_priv->sarea_priv = (drm_i810_sarea_t *)
	    ((u8 *) dev_priv->sarea_map->handle + init->sarea_priv_offset);

	dev_priv->ring.Start = init->ring_start;
	dev_priv->ring.End = init->ring_end;
	dev_priv->ring.Size = init->ring_size;

	dev_priv->ring.map.offset = dev->agp->base + init->ring_start;
	dev_priv->ring.map.size = init->ring_size;
	dev_priv->ring.map.type = _DRM_AGP;
	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) {
		dev->dev_private = (void *)dev_priv;
		i810_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->ring.tail_mask = dev_priv->ring.Size - 1;

	dev_priv->w = init->w;
	dev_priv->h = init->h;
	dev_priv->pitch = init->pitch;
	dev_priv->back_offset = init->back_offset;
	dev_priv->depth_offset = init->depth_offset;
	dev_priv->front_offset = init->front_offset;

	dev_priv->overlay_offset = init->overlay_offset;
	dev_priv->overlay_physical = init->overlay_physical;

	dev_priv->front_di1 = init->front_offset | init->pitch_bits;
	dev_priv->back_di1 = init->back_offset | init->pitch_bits;
	dev_priv->zi1 = init->depth_offset | init->pitch_bits;

	/* Program Hardware Status Page */
	dev_priv->hw_status_page =
	    pci_alloc_consistent(dev->pdev, PAGE_SIZE,
				 &dev_priv->dma_status_page);
	if (!dev_priv->hw_status_page) {
		dev->dev_private = (void *)dev_priv;
		i810_dma_cleanup(dev);
		DRM_ERROR("Can not allocate hardware status page\n");
		return -ENOMEM;
	}
	memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
	DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);

	I810_WRITE(0x02080, dev_priv->dma_status_page);
	DRM_DEBUG("Enabled hardware status page\n");

	/* Now we need to init our freelist */
	if (i810_freelist_init(dev, dev_priv) != 0) {
		dev->dev_private = (void *)dev_priv;
		i810_dma_cleanup(dev);
		DRM_ERROR("Not enough space in the status page for"
			  " the freelist\n");
		return -ENOMEM;
	}
	dev->dev_private = (void *)dev_priv;

	return 0;
}

static int i810_dma_init(struct drm_device *dev, void *data,
			 struct drm_file *file_priv)
{
	drm_i810_private_t *dev_priv;
	drm_i810_init_t *init = data;
	int retcode = 0;

	switch (init->func) {
	case I810_INIT_DMA_1_4:
		DRM_INFO("Using v1.4 init.\n");
		dev_priv = drm_alloc(sizeof(drm_i810_private_t),
				     DRM_MEM_DRIVER);
		if (dev_priv == NULL)
			return -ENOMEM;
		retcode = i810_dma_initialize(dev, dev_priv, init);
		break;

	case I810_CLEANUP_DMA:
		DRM_INFO("DMA Cleanup\n");
		retcode = i810_dma_cleanup(dev);
		break;
	default:
		return -EINVAL;
	}

	return retcode;
}

/* Most efficient way to verify state for the i810 is as it is
 * emitted.  Non-conformant state is silently dropped.
 *
 * Use 'volatile' & local var tmp to force the emitted values to be
 * identical to the verified ones.
 */
static void i810EmitContextVerified(struct drm_device * dev,
				    volatile unsigned int *code)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	int i, j = 0;
	unsigned int tmp;
	RING_LOCALS;

	BEGIN_LP_RING(I810_CTX_SETUP_SIZE);

	OUT_RING(GFX_OP_COLOR_FACTOR);
	OUT_RING(code[I810_CTXREG_CF1]);

	OUT_RING(GFX_OP_STIPPLE);
	OUT_RING(code[I810_CTXREG_ST1]);

	for (i = 4; i < I810_CTX_SETUP_SIZE; i++) {
		tmp = code[i];

		if ((tmp & (7 << 29)) == (3 << 29) &&
		    (tmp & (0x1f << 24)) < (0x1d << 24)) {
			OUT_RING(tmp);
			j++;
		} else
			printk("constext state dropped!!!\n");
	}

	if (j & 1)
		OUT_RING(0);

	ADVANCE_LP_RING();
}

static void i810EmitTexVerified(struct drm_device * dev, volatile unsigned int *code)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	int i, j = 0;
	unsigned int tmp;
	RING_LOCALS;

	BEGIN_LP_RING(I810_TEX_SETUP_SIZE);

	OUT_RING(GFX_OP_MAP_INFO);
	OUT_RING(code[I810_TEXREG_MI1]);
	OUT_RING(code[I810_TEXREG_MI2]);
	OUT_RING(code[I810_TEXREG_MI3]);

	for (i = 4; i < I810_TEX_SETUP_SIZE; i++) {
		tmp = code[i];

		if ((tmp & (7 << 29)) == (3 << 29) &&
		    (tmp & (0x1f << 24)) < (0x1d << 24)) {
			OUT_RING(tmp);
			j++;
		} else
			printk("texture state dropped!!!\n");
	}

	if (j & 1)
		OUT_RING(0);

	ADVANCE_LP_RING();
}

/* Need to do some additional checking when setting the dest buffer.
 */
static void i810EmitDestVerified(struct drm_device * dev,
				 volatile unsigned int *code)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	unsigned int tmp;
	RING_LOCALS;

	BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);

	tmp = code[I810_DESTREG_DI1];
	if (tmp == dev_priv->front_di1 || tmp == dev_priv->back_di1) {
		OUT_RING(CMD_OP_DESTBUFFER_INFO);
		OUT_RING(tmp);
	} else
		DRM_DEBUG("bad di1 %x (allow %x or %x)\n",
			  tmp, dev_priv->front_di1, dev_priv->back_di1);

	/* invarient:
	 */
	OUT_RING(CMD_OP_Z_BUFFER_INFO);
	OUT_RING(dev_priv->zi1);

	OUT_RING(GFX_OP_DESTBUFFER_VARS);
	OUT_RING(code[I810_DESTREG_DV1]);

	OUT_RING(GFX_OP_DRAWRECT_INFO);
	OUT_RING(code[I810_DESTREG_DR1]);
	OUT_RING(code[I810_DESTREG_DR2]);
	OUT_RING(code[I810_DESTREG_DR3]);
	OUT_RING(code[I810_DESTREG_DR4]);
	OUT_RING(0);

	ADVANCE_LP_RING();
}

static void i810EmitState(struct drm_device * dev)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
	unsigned int dirty = sarea_priv->dirty;

	DRM_DEBUG("%x\n", dirty);

	if (dirty & I810_UPLOAD_BUFFERS) {
		i810EmitDestVerified(dev, sarea_priv->BufferState);
		sarea_priv->dirty &= ~I810_UPLOAD_BUFFERS;
	}

	if (dirty & I810_UPLOAD_CTX) {
		i810EmitContextVerified(dev, sarea_priv->ContextState);
		sarea_priv->dirty &= ~I810_UPLOAD_CTX;
	}

	if (dirty & I810_UPLOAD_TEX0) {
		i810EmitTexVerified(dev, sarea_priv->TexState[0]);
		sarea_priv->dirty &= ~I810_UPLOAD_TEX0;
	}

	if (dirty & I810_UPLOAD_TEX1) {
		i810EmitTexVerified(dev, sarea_priv->TexState[1]);
		sarea_priv->dirty &= ~I810_UPLOAD_TEX1;
	}
}

/* need to verify
 */
static void i810_dma_dispatch_clear(struct drm_device * dev, int flags,
				    unsigned int clear_color,
				    unsigned int clear_zval)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
	int nbox = sarea_priv->nbox;
	struct drm_clip_rect *pbox = sarea_priv->boxes;
	int pitch = dev_priv->pitch;
	int cpp = 2;
	int i;
	RING_LOCALS;

	if (dev_priv->current_page == 1) {
		unsigned int tmp = flags;

		flags &= ~(I810_FRONT | I810_BACK);
		if (tmp & I810_FRONT)
			flags |= I810_BACK;
		if (tmp & I810_BACK)
			flags |= I810_FRONT;
	}

	i810_kernel_lost_context(dev);

	if (nbox > I810_NR_SAREA_CLIPRECTS)
		nbox = I810_NR_SAREA_CLIPRECTS;

	for (i = 0; i < nbox; i++, pbox++) {
		unsigned int x = pbox->x1;
		unsigned int y = pbox->y1;
		unsigned int width = (pbox->x2 - x) * cpp;
		unsigned int height = pbox->y2 - y;
		unsigned int start = y * pitch + x * cpp;

		if (pbox->x1 > pbox->x2 ||
		    pbox->y1 > pbox->y2 ||
		    pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
			continue;

		if (flags & I810_FRONT) {
			BEGIN_LP_RING(6);
			OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
			OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
			OUT_RING((height << 16) | width);
			OUT_RING(start);
			OUT_RING(clear_color);
			OUT_RING(0);
			ADVANCE_LP_RING();
		}

		if (flags & I810_BACK) {
			BEGIN_LP_RING(6);
			OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
			OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
			OUT_RING((height << 16) | width);
			OUT_RING(dev_priv->back_offset + start);
			OUT_RING(clear_color);
			OUT_RING(0);
			ADVANCE_LP_RING();
		}

		if (flags & I810_DEPTH) {
			BEGIN_LP_RING(6);
			OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3);
			OUT_RING(BR13_SOLID_PATTERN | (0xF0 << 16) | pitch);
			OUT_RING((height << 16) | width);
			OUT_RING(dev_priv->depth_offset + start);
			OUT_RING(clear_zval);
			OUT_RING(0);
			ADVANCE_LP_RING();
		}
	}
}

static void i810_dma_dispatch_swap(struct drm_device * dev)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
	int nbox = sarea_priv->nbox;
	struct drm_clip_rect *pbox = sarea_priv->boxes;
	int pitch = dev_priv->pitch;
	int cpp = 2;
	int i;
	RING_LOCALS;

	DRM_DEBUG("swapbuffers\n");

	i810_kernel_lost_context(dev);

	if (nbox > I810_NR_SAREA_CLIPRECTS)
		nbox = I810_NR_SAREA_CLIPRECTS;

	for (i = 0; i < nbox; i++, pbox++) {
		unsigned int w = pbox->x2 - pbox->x1;
		unsigned int h = pbox->y2 - pbox->y1;
		unsigned int dst = pbox->x1 * cpp + pbox->y1 * pitch;
		unsigned int start = dst;

		if (pbox->x1 > pbox->x2 ||
		    pbox->y1 > pbox->y2 ||
		    pbox->x2 > dev_priv->w || pbox->y2 > dev_priv->h)
			continue;

		BEGIN_LP_RING(6);
		OUT_RING(BR00_BITBLT_CLIENT | BR00_OP_SRC_COPY_BLT | 0x4);
		OUT_RING(pitch | (0xCC << 16));
		OUT_RING((h << 16) | (w * cpp));
		if (dev_priv->current_page == 0)
			OUT_RING(dev_priv->front_offset + start);
		else
			OUT_RING(dev_priv->back_offset + start);
		OUT_RING(pitch);
		if (dev_priv->current_page == 0)
			OUT_RING(dev_priv->back_offset + start);
		else
			OUT_RING(dev_priv->front_offset + start);
		ADVANCE_LP_RING();
	}
}

static void i810_dma_dispatch_vertex(struct drm_device * dev,
				     struct drm_buf * buf, int discard, int used)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
	drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
	struct drm_clip_rect *box = sarea_priv->boxes;
	int nbox = sarea_priv->nbox;
	unsigned long address = (unsigned long)buf->bus_address;
	unsigned long start = address - dev->agp->base;
	int i = 0;
	RING_LOCALS;

	i810_kernel_lost_context(dev);

	if (nbox > I810_NR_SAREA_CLIPRECTS)
		nbox = I810_NR_SAREA_CLIPRECTS;

	if (used > 4 * 1024)
		used = 0;

	if (sarea_priv->dirty)
		i810EmitState(dev);

	if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
		unsigned int prim = (sarea_priv->vertex_prim & PR_MASK);

		*(u32 *) buf_priv->kernel_virtual =
		    ((GFX_OP_PRIMITIVE | prim | ((used / 4) - 2)));

		if (used & 4) {
			*(u32 *) ((char *) buf_priv->kernel_virtual + used) = 0;
			used += 4;
		}

		i810_unmap_buffer(buf);
	}

	if (used) {
		do {
			if (i < nbox) {
				BEGIN_LP_RING(4);
				OUT_RING(GFX_OP_SCISSOR | SC_UPDATE_SCISSOR |
					 SC_ENABLE);
				OUT_RING(GFX_OP_SCISSOR_INFO);
				OUT_RING(box[i].x1 | (box[i].y1 << 16));
				OUT_RING((box[i].x2 -
					  1) | ((box[i].y2 - 1) << 16));
				ADVANCE_LP_RING();
			}

			BEGIN_LP_RING(4);
			OUT_RING(CMD_OP_BATCH_BUFFER);
			OUT_RING(start | BB1_PROTECTED);
			OUT_RING(start + used - 4);
			OUT_RING(0);
			ADVANCE_LP_RING();

		} while (++i < nbox);
	}

	if (discard) {
		dev_priv->counter++;

		(void)cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
			      I810_BUF_HARDWARE);

		BEGIN_LP_RING(8);
		OUT_RING(CMD_STORE_DWORD_IDX);
		OUT_RING(20);
		OUT_RING(dev_priv->counter);
		OUT_RING(CMD_STORE_DWORD_IDX);
		OUT_RING(buf_priv->my_use_idx);
		OUT_RING(I810_BUF_FREE);
		OUT_RING(CMD_REPORT_HEAD);
		OUT_RING(0);
		ADVANCE_LP_RING();
	}
}

static void i810_dma_dispatch_flip(struct drm_device * dev)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	int pitch = dev_priv->pitch;
	RING_LOCALS;

	DRM_DEBUG("page=%d pfCurrentPage=%d\n",
		  dev_priv->current_page,
		  dev_priv->sarea_priv->pf_current_page);

	i810_kernel_lost_context(dev);

	BEGIN_LP_RING(2);
	OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
	OUT_RING(0);
	ADVANCE_LP_RING();

	BEGIN_LP_RING(I810_DEST_SETUP_SIZE + 2);
	/* On i815 at least ASYNC is buggy */
	/* pitch<<5 is from 11.2.8 p158,
	   its the pitch / 8 then left shifted 8,
	   so (pitch >> 3) << 8 */
	OUT_RING(CMD_OP_FRONTBUFFER_INFO | (pitch << 5) /*| ASYNC_FLIP */ );
	if (dev_priv->current_page == 0) {
		OUT_RING(dev_priv->back_offset);
		dev_priv->current_page = 1;
	} else {
		OUT_RING(dev_priv->front_offset);
		dev_priv->current_page = 0;
	}
	OUT_RING(0);
	ADVANCE_LP_RING();

	BEGIN_LP_RING(2);
	OUT_RING(CMD_OP_WAIT_FOR_EVENT | WAIT_FOR_PLANE_A_FLIP);
	OUT_RING(0);
	ADVANCE_LP_RING();

	/* Increment the frame counter.  The client-side 3D driver must
	 * throttle the framerate by waiting for this value before
	 * performing the swapbuffer ioctl.
	 */
	dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;

}

static void i810_dma_quiescent(struct drm_device * dev)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	RING_LOCALS;

	i810_kernel_lost_context(dev);

	BEGIN_LP_RING(4);
	OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
	OUT_RING(CMD_REPORT_HEAD);
	OUT_RING(0);
	OUT_RING(0);
	ADVANCE_LP_RING();

	i810_wait_ring(dev, dev_priv->ring.Size - 8);
}

static int i810_flush_queue(struct drm_device * dev)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	struct drm_device_dma *dma = dev->dma;
	int i, ret = 0;
	RING_LOCALS;

	i810_kernel_lost_context(dev);

	BEGIN_LP_RING(2);
	OUT_RING(CMD_REPORT_HEAD);
	OUT_RING(0);
	ADVANCE_LP_RING();

	i810_wait_ring(dev, dev_priv->ring.Size - 8);

	for (i = 0; i < dma->buf_count; i++) {
		struct drm_buf *buf = dma->buflist[i];
		drm_i810_buf_priv_t *buf_priv = buf->dev_private;

		int used = cmpxchg(buf_priv->in_use, I810_BUF_HARDWARE,
				   I810_BUF_FREE);

		if (used == I810_BUF_HARDWARE)
			DRM_DEBUG("reclaimed from HARDWARE\n");
		if (used == I810_BUF_CLIENT)
			DRM_DEBUG("still on client\n");
	}

	return ret;
}

/* Must be called with the lock held */
static void i810_reclaim_buffers(struct drm_device *dev,
				 struct drm_file *file_priv)
{
	struct drm_device_dma *dma = dev->dma;
	int i;

	if (!dma)
		return;
	if (!dev->dev_private)
		return;
	if (!dma->buflist)
		return;

	i810_flush_queue(dev);

	for (i = 0; i < dma->buf_count; i++) {
		struct drm_buf *buf = dma->buflist[i];
		drm_i810_buf_priv_t *buf_priv = buf->dev_private;

		if (buf->file_priv == file_priv && buf_priv) {
			int used = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT,
					   I810_BUF_FREE);

			if (used == I810_BUF_CLIENT)
				DRM_DEBUG("reclaimed from client\n");
			if (buf_priv->currently_mapped == I810_BUF_MAPPED)
				buf_priv->currently_mapped = I810_BUF_UNMAPPED;
		}
	}
}

static int i810_flush_ioctl(struct drm_device *dev, void *data,
			    struct drm_file *file_priv)
{
	LOCK_TEST_WITH_RETURN(dev, file_priv);

	i810_flush_queue(dev);
	return 0;
}

static int i810_dma_vertex(struct drm_device *dev, void *data,
			   struct drm_file *file_priv)
{
	struct drm_device_dma *dma = dev->dma;
	drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
	u32 *hw_status = dev_priv->hw_status_page;
	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
	    dev_priv->sarea_priv;
	drm_i810_vertex_t *vertex = data;

	LOCK_TEST_WITH_RETURN(dev, file_priv);

	DRM_DEBUG("idx %d used %d discard %d\n",
		  vertex->idx, vertex->used, vertex->discard);

	if (vertex->idx < 0 || vertex->idx > dma->buf_count)
		return -EINVAL;

	i810_dma_dispatch_vertex(dev,
				 dma->buflist[vertex->idx],
				 vertex->discard, vertex->used);

	atomic_add(vertex->used, &dev->counts[_DRM_STAT_SECONDARY]);
	atomic_inc(&dev->counts[_DRM_STAT_DMA]);
	sarea_priv->last_enqueue = dev_priv->counter - 1;
	sarea_priv->last_dispatch = (int)hw_status[5];

	return 0;
}

static int i810_clear_bufs(struct drm_device *dev, void *data,
			   struct drm_file *file_priv)
{
	drm_i810_clear_t *clear = data;

	LOCK_TEST_WITH_RETURN(dev, file_priv);

	/* GH: Someone's doing nasty things... */
	if (!dev->dev_private) {
		return -EINVAL;
	}

	i810_dma_dispatch_clear(dev, clear->flags,
				clear->clear_color, clear->clear_depth);
	return 0;
}

static int i810_swap_bufs(struct drm_device *dev, void *data,
			  struct drm_file *file_priv)
{
	DRM_DEBUG("\n");

	LOCK_TEST_WITH_RETURN(dev, file_priv);

	i810_dma_dispatch_swap(dev);
	return 0;
}

static int i810_getage(struct drm_device *dev, void *data,
		       struct drm_file *file_priv)
{
	drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
	u32 *hw_status = dev_priv->hw_status_page;
	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
	    dev_priv->sarea_priv;

	sarea_priv->last_dispatch = (int)hw_status[5];
	return 0;
}

static int i810_getbuf(struct drm_device *dev, void *data,
		       struct drm_file *file_priv)
{
	int retcode = 0;
	drm_i810_dma_t *d = data;
	drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
	u32 *hw_status = dev_priv->hw_status_page;
	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
	    dev_priv->sarea_priv;

	LOCK_TEST_WITH_RETURN(dev, file_priv);

	d->granted = 0;

	retcode = i810_dma_get_buffer(dev, d, file_priv);

	DRM_DEBUG("i810_dma: %d returning %d, granted = %d\n",
		  current->pid, retcode, d->granted);

	sarea_priv->last_dispatch = (int)hw_status[5];

	return retcode;
}

static int i810_copybuf(struct drm_device *dev, void *data,
			struct drm_file *file_priv)
{
	/* Never copy - 2.4.x doesn't need it */
	return 0;
}

static int i810_docopy(struct drm_device *dev, void *data,
			struct drm_file *file_priv)
{
	/* Never copy - 2.4.x doesn't need it */
	return 0;
}

static void i810_dma_dispatch_mc(struct drm_device * dev, struct drm_buf * buf, int used,
				 unsigned int last_render)
{
	drm_i810_private_t *dev_priv = dev->dev_private;
	drm_i810_buf_priv_t *buf_priv = buf->dev_private;
	drm_i810_sarea_t *sarea_priv = dev_priv->sarea_priv;
	unsigned long address = (unsigned long)buf->bus_address;
	unsigned long start = address - dev->agp->base;
	int u;
	RING_LOCALS;

	i810_kernel_lost_context(dev);

	u = cmpxchg(buf_priv->in_use, I810_BUF_CLIENT, I810_BUF_HARDWARE);
	if (u != I810_BUF_CLIENT) {
		DRM_DEBUG("MC found buffer that isn't mine!\n");
	}

	if (used > 4 * 1024)
		used = 0;

	sarea_priv->dirty = 0x7f;

	DRM_DEBUG("addr 0x%lx, used 0x%x\n", address, used);

	dev_priv->counter++;
	DRM_DEBUG("dispatch counter : %ld\n", dev_priv->counter);
	DRM_DEBUG("start : %lx\n", start);
	DRM_DEBUG("used : %d\n", used);
	DRM_DEBUG("start + used - 4 : %ld\n", start + used - 4);

	if (buf_priv->currently_mapped == I810_BUF_MAPPED) {
		if (used & 4) {
			*(u32 *) ((char *) buf_priv->virtual + used) = 0;
			used += 4;
		}

		i810_unmap_buffer(buf);
	}
	BEGIN_LP_RING(4);
	OUT_RING(CMD_OP_BATCH_BUFFER);
	OUT_RING(start | BB1_PROTECTED);
	OUT_RING(start + used - 4);
	OUT_RING(0);
	ADVANCE_LP_RING();

	BEGIN_LP_RING(8);
	OUT_RING(CMD_STORE_DWORD_IDX);
	OUT_RING(buf_priv->my_use_idx);
	OUT_RING(I810_BUF_FREE);
	OUT_RING(0);

	OUT_RING(CMD_STORE_DWORD_IDX);
	OUT_RING(16);
	OUT_RING(last_render);
	OUT_RING(0);
	ADVANCE_LP_RING();
}

static int i810_dma_mc(struct drm_device *dev, void *data,
		       struct drm_file *file_priv)
{
	struct drm_device_dma *dma = dev->dma;
	drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
	u32 *hw_status = dev_priv->hw_status_page;
	drm_i810_sarea_t *sarea_priv = (drm_i810_sarea_t *)
	    dev_priv->sarea_priv;
	drm_i810_mc_t *mc = data;

	LOCK_TEST_WITH_RETURN(dev, file_priv);

	if (mc->idx >= dma->buf_count || mc->idx < 0)
		return -EINVAL;

	i810_dma_dispatch_mc(dev, dma->buflist[mc->idx], mc->used,
			     mc->last_render);

	atomic_add(mc->used, &dev->counts[_DRM_STAT_SECONDARY]);
	atomic_inc(&dev->counts[_DRM_STAT_DMA]);
	sarea_priv->last_enqueue = dev_priv->counter - 1;
	sarea_priv->last_dispatch = (int)hw_status[5];

	return 0;
}

static int i810_rstatus(struct drm_device *dev, void *data,
			struct drm_file *file_priv)
{
	drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;

	return (int)(((u32 *) (dev_priv->hw_status_page))[4]);
}

static int i810_ov0_info(struct drm_device *dev, void *data,
			 struct drm_file *file_priv)
{
	drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;
	drm_i810_overlay_t *ov = data;

	ov->offset = dev_priv->overlay_offset;
	ov->physical = dev_priv->overlay_physical;

	return 0;
}

static int i810_fstatus(struct drm_device *dev, void *data,
			struct drm_file *file_priv)
{
	drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;

	LOCK_TEST_WITH_RETURN(dev, file_priv);
	return I810_READ(0x30008);
}

static int i810_ov0_flip(struct drm_device *dev, void *data,
			 struct drm_file *file_priv)
{
	drm_i810_private_t *dev_priv = (drm_i810_private_t *) dev->dev_private;

	LOCK_TEST_WITH_RETURN(dev, file_priv);
	//Tell the overlay to update
	I810_WRITE(0x30000, dev_priv->overlay_physical | 0x80000000);

	return 0;
}

/* Not sure why this isn't set all the time:
 */
static void i810_do_init_pageflip(struct drm_device * dev)
{
	drm_i810_private_t *dev_priv = dev->dev_private;

	DRM_DEBUG("\n");
	dev_priv->page_flipping = 1;
	dev_priv->current_page = 0;
	dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
}

static int i810_do_cleanup_pageflip(struct drm_device * dev)
{
	drm_i810_private_t *dev_priv = dev->dev_private;

	DRM_DEBUG("\n");
	if (dev_priv->current_page != 0)
		i810_dma_dispatch_flip(dev);

	dev_priv->page_flipping = 0;
	return 0;