Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 725 insertions, 0 deletions

diff --git a/drivers/char/drm/i915_dma.c b/drivers/char/drm/i915_dma.c
new file mode 100644
index 00000000000..7300a09dbd5
--- /dev/null
+++ b/drivers/char/drm/i915_dma.c
@@ -0,0 +1,725 @@
+/* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
+ */
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ **************************************************************************/
+
+#include "drmP.h"
+#include "drm.h"
+#include "i915_drm.h"
+#include "i915_drv.h"
+
+drm_ioctl_desc_t i915_ioctls[] = {
+	[DRM_IOCTL_NR(DRM_I915_INIT)] = {i915_dma_init, 1, 1},
+	[DRM_IOCTL_NR(DRM_I915_FLUSH)] = {i915_flush_ioctl, 1, 0},
+	[DRM_IOCTL_NR(DRM_I915_FLIP)] = {i915_flip_bufs, 1, 0},
+	[DRM_IOCTL_NR(DRM_I915_BATCHBUFFER)] = {i915_batchbuffer, 1, 0},
+	[DRM_IOCTL_NR(DRM_I915_IRQ_EMIT)] = {i915_irq_emit, 1, 0},
+	[DRM_IOCTL_NR(DRM_I915_IRQ_WAIT)] = {i915_irq_wait, 1, 0},
+	[DRM_IOCTL_NR(DRM_I915_GETPARAM)] = {i915_getparam, 1, 0},
+	[DRM_IOCTL_NR(DRM_I915_SETPARAM)] = {i915_setparam, 1, 1},
+	[DRM_IOCTL_NR(DRM_I915_ALLOC)] = {i915_mem_alloc, 1, 0},
+	[DRM_IOCTL_NR(DRM_I915_FREE)] = {i915_mem_free, 1, 0},
+	[DRM_IOCTL_NR(DRM_I915_INIT_HEAP)] = {i915_mem_init_heap, 1, 1},
+	[DRM_IOCTL_NR(DRM_I915_CMDBUFFER)] = {i915_cmdbuffer, 1, 0}
+};
+
+int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
+
+/* Really want an OS-independent resettable timer.  Would like to have
+ * this loop run for (eg) 3 sec, but have the timer reset every time
+ * the head pointer changes, so that EBUSY only happens if the ring
+ * actually stalls for (eg) 3 seconds.
+ */
+int i915_wait_ring(drm_device_t * dev, int n, const char *caller)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
+	u32 last_head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
+	int i;
+
+	for (i = 0; i < 10000; i++) {
+		ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
+		ring->space = ring->head - (ring->tail + 8);
+		if (ring->space < 0)
+			ring->space += ring->Size;
+		if (ring->space >= n)
+			return 0;
+
+		dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
+
+		if (ring->head != last_head)
+			i = 0;
+
+		last_head = ring->head;
+	}
+
+	return DRM_ERR(EBUSY);
+}
+
+void i915_kernel_lost_context(drm_device_t * dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
+
+	ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
+	ring->tail = I915_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
+	ring->space = ring->head - (ring->tail + 8);
+	if (ring->space < 0)
+		ring->space += ring->Size;
+
+	if (ring->head == ring->tail)
+		dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
+}
+
+int i915_dma_cleanup(drm_device_t * dev)
+{
+	/* 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 (dev->irq)
+		drm_irq_uninstall (dev);
+
+	if (dev->dev_private) {
+		drm_i915_private_t *dev_priv =
+		    (drm_i915_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) {
+			drm_pci_free(dev, PAGE_SIZE, dev_priv->hw_status_page,
+				     dev_priv->dma_status_page);
+			/* Need to rewrite hardware status page */
+			I915_WRITE(0x02080, 0x1ffff000);
+		}
+
+		drm_free (dev->dev_private, sizeof(drm_i915_private_t),
+			   DRM_MEM_DRIVER);
+
+		dev->dev_private = NULL;
+	}
+
+	return 0;
+}
+
+static int i915_initialize(drm_device_t * dev,
+			   drm_i915_private_t * dev_priv,
+			   drm_i915_init_t * init)
+{
+	memset(dev_priv, 0, sizeof(drm_i915_private_t));
+
+	DRM_GETSAREA();
+	if (!dev_priv->sarea) {
+		DRM_ERROR("can not find sarea!\n");
+		dev->dev_private = (void *)dev_priv;
+		i915_dma_cleanup(dev);
+		return DRM_ERR(EINVAL);
+	}
+
+	dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
+	if (!dev_priv->mmio_map) {
+		dev->dev_private = (void *)dev_priv;
+		i915_dma_cleanup(dev);
+		DRM_ERROR("can not find mmio map!\n");
+		return DRM_ERR(EINVAL);
+	}
+
+	dev_priv->sarea_priv = (drm_i915_sarea_t *)
+	    ((u8 *) dev_priv->sarea->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.tail_mask = dev_priv->ring.Size - 1;
+
+	dev_priv->ring.map.offset = init->ring_start;
+	dev_priv->ring.map.size = init->ring_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) {
+		dev->dev_private = (void *)dev_priv;
+		i915_dma_cleanup(dev);
+		DRM_ERROR("can not ioremap virtual address for"
+			  " ring buffer\n");
+		return DRM_ERR(ENOMEM);
+	}
+
+	dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
+
+	dev_priv->back_offset = init->back_offset;
+	dev_priv->front_offset = init->front_offset;
+	dev_priv->current_page = 0;
+	dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
+
+	/* We are using separate values as placeholders for mechanisms for
+	 * private backbuffer/depthbuffer usage.
+	 */
+	dev_priv->use_mi_batchbuffer_start = 0;
+
+	/* Allow hardware batchbuffers unless told otherwise.
+	 */
+	dev_priv->allow_batchbuffer = 1;
+
+	/* Program Hardware Status Page */
+	dev_priv->hw_status_page = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
+						 0xffffffff, 
+						 &dev_priv->dma_status_page);
+
+	if (!dev_priv->hw_status_page) {
+		dev->dev_private = (void *)dev_priv;
+		i915_dma_cleanup(dev);
+		DRM_ERROR("Can not allocate hardware status page\n");
+		return DRM_ERR(ENOMEM);
+	}
+	memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
+	DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
+
+	I915_WRITE(0x02080, dev_priv->dma_status_page);
+	DRM_DEBUG("Enabled hardware status page\n");
+
+	dev->dev_private = (void *)dev_priv;
+
+	return 0;
+}
+
+static int i915_resume(drm_device_t * dev)
+{
+	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
+	if (!dev_priv->sarea) {
+		DRM_ERROR("can not find sarea!\n");
+		return DRM_ERR(EINVAL);
+	}
+
+	if (!dev_priv->mmio_map) {
+		DRM_ERROR("can not find mmio map!\n");
+		return DRM_ERR(EINVAL);
+	}
+
+	if (dev_priv->ring.map.handle == NULL) {
+		DRM_ERROR("can not ioremap virtual address for"
+			  " ring buffer\n");
+		return DRM_ERR(ENOMEM);
+	}
+
+	/* Program Hardware Status Page */
+	if (!dev_priv->hw_status_page) {
+		DRM_ERROR("Can not find hardware status page\n");
+		return DRM_ERR(EINVAL);
+	}
+	DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
+
+	I915_WRITE(0x02080, dev_priv->dma_status_page);
+	DRM_DEBUG("Enabled hardware status page\n");
+
+	return 0;
+}
+
+int i915_dma_init(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_i915_private_t *dev_priv;
+	drm_i915_init_t init;
+	int retcode = 0;
+
+	DRM_COPY_FROM_USER_IOCTL(init, (drm_i915_init_t __user *) data,
+				 sizeof(init));
+
+	switch (init.func) {
+	case I915_INIT_DMA:
+		dev_priv = drm_alloc (sizeof(drm_i915_private_t),
+				       DRM_MEM_DRIVER);
+		if (dev_priv == NULL)
+			return DRM_ERR(ENOMEM);
+		retcode = i915_initialize(dev, dev_priv, &init);
+		break;
+	case I915_CLEANUP_DMA:
+		retcode = i915_dma_cleanup(dev);
+		break;
+	case I915_RESUME_DMA:
+		retcode = i915_resume(dev);
+		break;
+	default:
+		retcode = -EINVAL;
+		break;
+	}
+
+	return retcode;
+}
+
+/* Implement basically the same security restrictions as hardware does
+ * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
+ *
+ * Most of the calculations below involve calculating the size of a
+ * particular instruction.  It's important to get the size right as
+ * that tells us where the next instruction to check is.  Any illegal
+ * instruction detected will be given a size of zero, which is a
+ * signal to abort the rest of the buffer.
+ */
+static int do_validate_cmd(int cmd)
+{
+	switch (((cmd >> 29) & 0x7)) {
+	case 0x0:
+		switch ((cmd >> 23) & 0x3f) {
+		case 0x0:
+			return 1;	/* MI_NOOP */
+		case 0x4:
+			return 1;	/* MI_FLUSH */
+		default:
+			return 0;	/* disallow everything else */
+		}
+		break;
+	case 0x1:
+		return 0;	/* reserved */
+	case 0x2:
+		return (cmd & 0xff) + 2;	/* 2d commands */
+	case 0x3:
+		if (((cmd >> 24) & 0x1f) <= 0x18)
+			return 1;
+
+		switch ((cmd >> 24) & 0x1f) {
+		case 0x1c:
+			return 1;
+		case 0x1d:
+			switch ((cmd>>16)&0xff) {
+			case 0x3:
+				return (cmd & 0x1f) + 2;
+			case 0x4:
+				return (cmd & 0xf) + 2;
+			default:
+				return (cmd & 0xffff) + 2;
+			}
+		case 0x1e:
+			if (cmd & (1 << 23))
+				return (cmd & 0xffff) + 1;
+			else
+				return 1;
+		case 0x1f:
+			if ((cmd & (1 << 23)) == 0)	/* inline vertices */
+				return (cmd & 0x1ffff) + 2;
+			else if (cmd & (1 << 17))	/* indirect random */
+				if ((cmd & 0xffff) == 0)
+					return 0;	/* unknown length, too hard */
+				else
+					return (((cmd & 0xffff) + 1) / 2) + 1;
+			else
+				return 2;	/* indirect sequential */
+		default:
+			return 0;
+		}
+	default:
+		return 0;
+	}
+
+	return 0;
+}
+
+static int validate_cmd(int cmd)
+{
+	int ret = do_validate_cmd(cmd);
+
+/* 	printk("validate_cmd( %x ): %d\n", cmd, ret); */
+
+	return ret;
+}
+
+static int i915_emit_cmds(drm_device_t * dev, int __user * buffer, int dwords)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	int i;
+	RING_LOCALS;
+
+	for (i = 0; i < dwords;) {
+		int cmd, sz;
+
+		if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
+			return DRM_ERR(EINVAL);
+
+/* 		printk("%d/%d ", i, dwords); */
+
+		if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
+			return DRM_ERR(EINVAL);
+
+		BEGIN_LP_RING(sz);
+		OUT_RING(cmd);
+
+		while (++i, --sz) {
+			if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
+							 sizeof(cmd))) {
+				return DRM_ERR(EINVAL);
+			}
+			OUT_RING(cmd);
+		}
+		ADVANCE_LP_RING();
+	}
+
+	return 0;
+}
+
+static int i915_emit_box(drm_device_t * dev,
+			 drm_clip_rect_t __user * boxes,
+			 int i, int DR1, int DR4)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	drm_clip_rect_t box;
+	RING_LOCALS;
+
+	if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
+		return EFAULT;
+	}
+
+	if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
+		DRM_ERROR("Bad box %d,%d..%d,%d\n",
+			  box.x1, box.y1, box.x2, box.y2);
+		return DRM_ERR(EINVAL);
+	}
+
+	BEGIN_LP_RING(6);
+	OUT_RING(GFX_OP_DRAWRECT_INFO);
+	OUT_RING(DR1);
+	OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
+	OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
+	OUT_RING(DR4);
+	OUT_RING(0);
+	ADVANCE_LP_RING();
+
+	return 0;
+}
+
+static int i915_dispatch_cmdbuffer(drm_device_t * dev,
+				   drm_i915_cmdbuffer_t * cmd)
+{
+	int nbox = cmd->num_cliprects;
+	int i = 0, count, ret;
+
+	if (cmd->sz & 0x3) {
+		DRM_ERROR("alignment");
+		return DRM_ERR(EINVAL);
+	}
+
+	i915_kernel_lost_context(dev);
+
+	count = nbox ? nbox : 1;
+
+	for (i = 0; i < count; i++) {
+		if (i < nbox) {
+			ret = i915_emit_box(dev, cmd->cliprects, i,
+					    cmd->DR1, cmd->DR4);
+			if (ret)
+				return ret;
+		}
+
+		ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int i915_dispatch_batchbuffer(drm_device_t * dev,
+				     drm_i915_batchbuffer_t * batch)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	drm_clip_rect_t __user *boxes = batch->cliprects;
+	int nbox = batch->num_cliprects;
+	int i = 0, count;
+	RING_LOCALS;
+
+	if ((batch->start | batch->used) & 0x7) {
+		DRM_ERROR("alignment");
+		return DRM_ERR(EINVAL);
+	}
+
+	i915_kernel_lost_context(dev);
+
+	count = nbox ? nbox : 1;
+
+	for (i = 0; i < count; i++) {
+		if (i < nbox) {
+			int ret = i915_emit_box(dev, boxes, i,
+						batch->DR1, batch->DR4);
+			if (ret)
+				return ret;
+		}
+
+		if (dev_priv->use_mi_batchbuffer_start) {
+			BEGIN_LP_RING(2);
+			OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
+			OUT_RING(batch->start | MI_BATCH_NON_SECURE);
+			ADVANCE_LP_RING();
+		} else {
+			BEGIN_LP_RING(4);
+			OUT_RING(MI_BATCH_BUFFER);
+			OUT_RING(batch->start | MI_BATCH_NON_SECURE);
+			OUT_RING(batch->start + batch->used - 4);
+			OUT_RING(0);
+			ADVANCE_LP_RING();
+		}
+	}
+
+	dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
+
+	BEGIN_LP_RING(4);
+	OUT_RING(CMD_STORE_DWORD_IDX);
+	OUT_RING(20);
+	OUT_RING(dev_priv->counter);
+	OUT_RING(0);
+	ADVANCE_LP_RING();
+
+	return 0;
+}
+
+static int i915_dispatch_flip(drm_device_t * dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	RING_LOCALS;
+
+	DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
+		  __FUNCTION__,
+		  dev_priv->current_page,
+		  dev_priv->sarea_priv->pf_current_page);
+
+	i915_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(6);
+	OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
+	OUT_RING(0);
+	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(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
+	OUT_RING(0);
+	ADVANCE_LP_RING();
+
+	dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
+
+	BEGIN_LP_RING(4);
+	OUT_RING(CMD_STORE_DWORD_IDX);
+	OUT_RING(20);
+	OUT_RING(dev_priv->counter);
+	OUT_RING(0);
+	ADVANCE_LP_RING();
+
+	dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
+	return 0;
+}
+
+static int i915_quiescent(drm_device_t * dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+
+	i915_kernel_lost_context(dev);
+	return i915_wait_ring(dev, dev_priv->ring.Size - 8, __FUNCTION__);
+}
+
+int i915_flush_ioctl(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+
+	LOCK_TEST_WITH_RETURN(dev, filp);
+
+	return i915_quiescent(dev);
+}
+
+int i915_batchbuffer(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+	u32 *hw_status = dev_priv->hw_status_page;
+	drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
+	    dev_priv->sarea_priv;
+	drm_i915_batchbuffer_t batch;
+	int ret;
+
+	if (!dev_priv->allow_batchbuffer) {
+		DRM_ERROR("Batchbuffer ioctl disabled\n");
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL(batch, (drm_i915_batchbuffer_t __user *) data,
+				 sizeof(batch));
+
+	DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
+		  batch.start, batch.used, batch.num_cliprects);
+
+	LOCK_TEST_WITH_RETURN(dev, filp);
+
+	if (batch.num_cliprects && DRM_VERIFYAREA_READ(batch.cliprects,
+						       batch.num_cliprects *
+						       sizeof(drm_clip_rect_t)))
+		return DRM_ERR(EFAULT);
+
+	ret = i915_dispatch_batchbuffer(dev, &batch);
+
+	sarea_priv->last_dispatch = (int)hw_status[5];
+	return ret;
+}
+
+int i915_cmdbuffer(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+	u32 *hw_status = dev_priv->hw_status_page;
+	drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
+	    dev_priv->sarea_priv;
+	drm_i915_cmdbuffer_t cmdbuf;
+	int ret;
+
+	DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_i915_cmdbuffer_t __user *) data,
+				 sizeof(cmdbuf));
+
+	DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
+		  cmdbuf.buf, cmdbuf.sz, cmdbuf.num_cliprects);
+
+	LOCK_TEST_WITH_RETURN(dev, filp);
+
+	if (cmdbuf.num_cliprects &&
+	    DRM_VERIFYAREA_READ(cmdbuf.cliprects,
+				cmdbuf.num_cliprects *
+				sizeof(drm_clip_rect_t))) {
+		DRM_ERROR("Fault accessing cliprects\n");
+		return DRM_ERR(EFAULT);
+	}
+
+	ret = i915_dispatch_cmdbuffer(dev, &cmdbuf);
+	if (ret) {
+		DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
+		return ret;
+	}
+
+	sarea_priv->last_dispatch = (int)hw_status[5];
+	return 0;
+}
+
+int i915_do_cleanup_pageflip(drm_device_t * dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+
+	DRM_DEBUG("%s\n", __FUNCTION__);
+	if (dev_priv->current_page != 0)
+		i915_dispatch_flip(dev);
+
+	return 0;
+}
+
+int i915_flip_bufs(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+
+	DRM_DEBUG("%s\n", __FUNCTION__);
+
+	LOCK_TEST_WITH_RETURN(dev, filp);
+
+	return i915_dispatch_flip(dev);
+}
+
+int i915_getparam(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	drm_i915_getparam_t param;
+	int value;
+
+	if (!dev_priv) {
+		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_getparam_t __user *) data,
+				 sizeof(param));
+
+	switch (param.param) {
+	case I915_PARAM_IRQ_ACTIVE:
+		value = dev->irq ? 1 : 0;
+		break;
+	case I915_PARAM_ALLOW_BATCHBUFFER:
+		value = dev_priv->allow_batchbuffer ? 1 : 0;
+		break;
+	default:
+		DRM_ERROR("Unkown parameter %d\n", param.param);
+		return DRM_ERR(EINVAL);
+	}
+
+	if (DRM_COPY_TO_USER(param.value, &value, sizeof(int))) {
+		DRM_ERROR("DRM_COPY_TO_USER failed\n");
+		return DRM_ERR(EFAULT);
+	}
+
+	return 0;
+}
+
+int i915_setparam(DRM_IOCTL_ARGS)
+{
+	DRM_DEVICE;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	drm_i915_setparam_t param;
+
+	if (!dev_priv) {
+		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
+		return DRM_ERR(EINVAL);
+	}
+
+	DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_setparam_t __user *) data,
+				 sizeof(param));
+
+	switch (param.param) {
+	case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
+		dev_priv->use_mi_batchbuffer_start = param.value;
+		break;
+	case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
+		dev_priv->tex_lru_log_granularity = param.value;
+		break;
+	case I915_SETPARAM_ALLOW_BATCHBUFFER:
+		dev_priv->allow_batchbuffer = param.value;
+		break;
+	default:
+		DRM_ERROR("unknown parameter %d\n", param.param);
+		return DRM_ERR(EINVAL);
+	}
+
+	return 0;
+}
+
+void i915_driver_pretakedown(drm_device_t *dev)
+{
+	if ( dev->dev_private ) {
+		drm_i915_private_t *dev_priv = dev->dev_private;
+	        i915_mem_takedown( &(dev_priv->agp_heap) );
+ 	}
+	i915_dma_cleanup( dev );
+}
+
+void i915_driver_prerelease(drm_device_t *dev, DRMFILE filp)
+{
+	if ( dev->dev_private ) {
+		drm_i915_private_t *dev_priv = dev->dev_private;
+                i915_mem_release( dev, filp, dev_priv->agp_heap );
+	}
+}
+