drm: remove the gamma driver

The gamma driver has been broken for quite a while, it doesn't build,
we don't have a userspace, mine is in Ireland etc...
Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/char/drm/Kconfig

@@ -23,13 +23,6 @@ config DRM_TDFX
 	  Choose this option if you have a 3dfx Banshee or Voodoo3 (or later),
 	  graphics card.  If M is selected, the module will be called tdfx.
 
-config DRM_GAMMA
-	tristate "3dlabs GMX 2000"
-	depends on DRM && BROKEN
-	help
-	  This is the old gamma driver, please tell me if it might actually
-	  work.
-
 config DRM_R128
 	tristate "ATI Rage 128"
 	depends on DRM && PCI

drivers/char/drm/Makefile

@@ -8,7 +8,6 @@ drm-objs    :=	drm_auth.o drm_bufs.o drm_context.o drm_dma.o drm_drawable.o \
 		drm_agpsupport.o drm_scatter.o ati_pcigart.o drm_pci.o \
 		drm_sysfs.o
 
-gamma-objs  := gamma_drv.o gamma_dma.o
 tdfx-objs   := tdfx_drv.o
 r128-objs   := r128_drv.o r128_cce.o r128_state.o r128_irq.o
 mga-objs    := mga_drv.o mga_dma.o mga_state.o mga_warp.o mga_irq.o
@@ -29,7 +28,6 @@ i915-objs   += i915_ioc32.o
 endif
 
 obj-$(CONFIG_DRM)	+= drm.o
-obj-$(CONFIG_DRM_GAMMA) += gamma.o
 obj-$(CONFIG_DRM_TDFX)	+= tdfx.o
 obj-$(CONFIG_DRM_R128)	+= r128.o
 obj-$(CONFIG_DRM_RADEON)+= radeon.o

drivers/char/drm/drm_pciids.h

@@ -182,10 +182,6 @@
 	{0x8086, 0x2572, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
 	{0, 0, 0}
 
-#define gamma_PCI_IDS \
-	{0x3d3d, 0x0008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
-	{0, 0, 0}
-
 #define savage_PCI_IDS \
 	{0x5333, 0x8a22, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
 	{0x5333, 0x8a23, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \

drivers/char/drm/gamma_context.h

-/* drm_context.h -- IOCTLs for generic contexts -*- linux-c -*-
- * Created: Fri Nov 24 18:31:37 2000 by gareth@valinux.com
- *
- * Copyright 1999, 2000 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
- * VA LINUX SYSTEMS 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>
- *    Gareth Hughes <gareth@valinux.com>
- * ChangeLog:
- *  2001-11-16	Torsten Duwe <duwe@caldera.de>
- *		added context constructor/destructor hooks,
- *		needed by SiS driver's memory management.
- */
-
-/* ================================================================
- * Old-style context support -- only used by gamma.  
- */
-
-
-/* The drm_read and drm_write_string code (especially that which manages
-   the circular buffer), is based on Alessandro Rubini's LINUX DEVICE
-   DRIVERS (Cambridge: O'Reilly, 1998), pages 111-113. */
-
-ssize_t gamma_fops_read(struct file *filp, char __user *buf, size_t count, loff_t *off)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int	      left;
-	int	      avail;
-	int	      send;
-	int	      cur;
-
-	DRM_DEBUG("%p, %p\n", dev->buf_rp, dev->buf_wp);
-
-	while (dev->buf_rp == dev->buf_wp) {
-		DRM_DEBUG("  sleeping\n");
-		if (filp->f_flags & O_NONBLOCK) {
-			return -EAGAIN;
-		}
-		interruptible_sleep_on(&dev->buf_readers);
-		if (signal_pending(current)) {
-			DRM_DEBUG("  interrupted\n");
-			return -ERESTARTSYS;
-		}
-		DRM_DEBUG("  awake\n");
-	}
-
-	left  = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
-	avail = DRM_BSZ - left;
-	send  = DRM_MIN(avail, count);
-
-	while (send) {
-		if (dev->buf_wp > dev->buf_rp) {
-			cur = DRM_MIN(send, dev->buf_wp - dev->buf_rp);
-		} else {
-			cur = DRM_MIN(send, dev->buf_end - dev->buf_rp);
-		}
-		if (copy_to_user(buf, dev->buf_rp, cur))
-			return -EFAULT;
-		dev->buf_rp += cur;
-		if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf;
-		send -= cur;
-	}
-
-	wake_up_interruptible(&dev->buf_writers);
-	return DRM_MIN(avail, count);
-}
-
-
-/* In an incredibly convoluted setup, the kernel module actually calls
- * back into the X server to perform context switches on behalf of the
- * 3d clients.
- */
-int DRM(write_string)(drm_device_t *dev, const char *s)
-{
-	int left   = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ;
-	int send   = strlen(s);
-	int count;
-
-	DRM_DEBUG("%d left, %d to send (%p, %p)\n",
-		  left, send, dev->buf_rp, dev->buf_wp);
-
-	if (left == 1 || dev->buf_wp != dev->buf_rp) {
-		DRM_ERROR("Buffer not empty (%d left, wp = %p, rp = %p)\n",
-			  left,
-			  dev->buf_wp,
-			  dev->buf_rp);
-	}
-
-	while (send) {
-		if (dev->buf_wp >= dev->buf_rp) {
-			count = DRM_MIN(send, dev->buf_end - dev->buf_wp);
-			if (count == left) --count; /* Leave a hole */
-		} else {
-			count = DRM_MIN(send, dev->buf_rp - dev->buf_wp - 1);
-		}
-		strncpy(dev->buf_wp, s, count);
-		dev->buf_wp += count;
-		if (dev->buf_wp == dev->buf_end) dev->buf_wp = dev->buf;
-		send -= count;
-	}
-
-	if (dev->buf_async) kill_fasync(&dev->buf_async, SIGIO, POLL_IN);
-
-	DRM_DEBUG("waking\n");
-	wake_up_interruptible(&dev->buf_readers);
-	return 0;
-}
-
-unsigned int gamma_fops_poll(struct file *filp, struct poll_table_struct *wait)
-{
-	drm_file_t   *priv = filp->private_data;
-	drm_device_t *dev  = priv->dev;
-
-	poll_wait(filp, &dev->buf_readers, wait);
-	if (dev->buf_wp != dev->buf_rp) return POLLIN | POLLRDNORM;
-	return 0;
-}
-
-int DRM(context_switch)(drm_device_t *dev, int old, int new)
-{
-	char	    buf[64];
-	drm_queue_t *q;
-
-	if (test_and_set_bit(0, &dev->context_flag)) {
-		DRM_ERROR("Reentering -- FIXME\n");
-		return -EBUSY;
-	}
-
-	DRM_DEBUG("Context switch from %d to %d\n", old, new);
-
-	if (new >= dev->queue_count) {
-		clear_bit(0, &dev->context_flag);
-		return -EINVAL;
-	}
-
-	if (new == dev->last_context) {
-		clear_bit(0, &dev->context_flag);
-		return 0;
-	}
-
-	q = dev->queuelist[new];
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->use_count) == 1) {
-		atomic_dec(&q->use_count);
-		clear_bit(0, &dev->context_flag);
-		return -EINVAL;
-	}
-
-	/* This causes the X server to wake up & do a bunch of hardware
-	 * interaction to actually effect the context switch.
-	 */
-	sprintf(buf, "C %d %d\n", old, new);
-	DRM(write_string)(dev, buf);
-
-	atomic_dec(&q->use_count);
-
-	return 0;
-}
-
-int DRM(context_switch_complete)(drm_device_t *dev, int new)
-{
-	drm_device_dma_t *dma = dev->dma;
-
-	dev->last_context = new;  /* PRE/POST: This is the _only_ writer. */
-	dev->last_switch  = jiffies;
-
-	if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
-		DRM_ERROR("Lock isn't held after context switch\n");
-	}
-
-	if (!dma || !(dma->next_buffer && dma->next_buffer->while_locked)) {
-		if (DRM(lock_free)(dev, &dev->lock.hw_lock->lock,
-				  DRM_KERNEL_CONTEXT)) {
-			DRM_ERROR("Cannot free lock\n");
-		}
-	}
-
-	clear_bit(0, &dev->context_flag);
-	wake_up_interruptible(&dev->context_wait);
-
-	return 0;
-}
-
-static int DRM(init_queue)(drm_device_t *dev, drm_queue_t *q, drm_ctx_t *ctx)
-{
-	DRM_DEBUG("\n");
-
-	if (atomic_read(&q->use_count) != 1
-	    || atomic_read(&q->finalization)
-	    || atomic_read(&q->block_count)) {
-		DRM_ERROR("New queue is already in use: u%d f%d b%d\n",
-			  atomic_read(&q->use_count),
-			  atomic_read(&q->finalization),
-			  atomic_read(&q->block_count));
-	}
-
-	atomic_set(&q->finalization,  0);
-	atomic_set(&q->block_count,   0);
-	atomic_set(&q->block_read,    0);
-	atomic_set(&q->block_write,   0);
-	atomic_set(&q->total_queued,  0);
-	atomic_set(&q->total_flushed, 0);
-	atomic_set(&q->total_locks,   0);
-
-	init_waitqueue_head(&q->write_queue);
-	init_waitqueue_head(&q->read_queue);
-	init_waitqueue_head(&q->flush_queue);
-
-	q->flags = ctx->flags;
-
-	DRM(waitlist_create)(&q->waitlist, dev->dma->buf_count);
-
-	return 0;
-}
-
-
-/* drm_alloc_queue:
-PRE: 1) dev->queuelist[0..dev->queue_count] is allocated and will not
-	disappear (so all deallocation must be done after IOCTLs are off)
-     2) dev->queue_count < dev->queue_slots
-     3) dev->queuelist[i].use_count == 0 and
-	dev->queuelist[i].finalization == 0 if i not in use
-POST: 1) dev->queuelist[i].use_count == 1
-      2) dev->queue_count < dev->queue_slots */
-
-static int DRM(alloc_queue)(drm_device_t *dev)
-{
-	int	    i;
-	drm_queue_t *queue;
-	int	    oldslots;
-	int	    newslots;
-				/* Check for a free queue */
-	for (i = 0; i < dev->queue_count; i++) {
-		atomic_inc(&dev->queuelist[i]->use_count);
-		if (atomic_read(&dev->queuelist[i]->use_count) == 1
-		    && !atomic_read(&dev->queuelist[i]->finalization)) {
-			DRM_DEBUG("%d (free)\n", i);
-			return i;
-		}
-		atomic_dec(&dev->queuelist[i]->use_count);
-	}
-				/* Allocate a new queue */
-	down(&dev->struct_sem);
-
-	queue = DRM(alloc)(sizeof(*queue), DRM_MEM_QUEUES);
-	memset(queue, 0, sizeof(*queue));
-	atomic_set(&queue->use_count, 1);
-
-	++dev->queue_count;
-	if (dev->queue_count >= dev->queue_slots) {
-		oldslots = dev->queue_slots * sizeof(*dev->queuelist);
-		if (!dev->queue_slots) dev->queue_slots = 1;
-		dev->queue_slots *= 2;
-		newslots = dev->queue_slots * sizeof(*dev->queuelist);
-
-		dev->queuelist = DRM(realloc)(dev->queuelist,
-					      oldslots,
-					      newslots,
-					      DRM_MEM_QUEUES);
-		if (!dev->queuelist) {
-			up(&dev->struct_sem);
-			DRM_DEBUG("out of memory\n");
-			return -ENOMEM;
-		}
-	}
-	dev->queuelist[dev->queue_count-1] = queue;
-
-	up(&dev->struct_sem);
-	DRM_DEBUG("%d (new)\n", dev->queue_count - 1);
-	return dev->queue_count - 1;
-}
-
-int DRM(resctx)(struct inode *inode, struct file *filp,
-		unsigned int cmd, unsigned long arg)
-{
-	drm_ctx_res_t __user *argp = (void __user *)arg;
-	drm_ctx_res_t	res;
-	drm_ctx_t	ctx;
-	int		i;
-
-	DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
-	if (copy_from_user(&res, argp, sizeof(res)))
-		return -EFAULT;
-	if (res.count >= DRM_RESERVED_CONTEXTS) {
-		memset(&ctx, 0, sizeof(ctx));
-		for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
-			ctx.handle = i;
-			if (copy_to_user(&res.contexts[i],
-					 &i,
-					 sizeof(i)))
-				return -EFAULT;
-		}
-	}
-	res.count = DRM_RESERVED_CONTEXTS;
-	if (copy_to_user(argp, &res, sizeof(res)))
-		return -EFAULT;
-	return 0;
-}
-
-int DRM(addctx)(struct inode *inode, struct file *filp,
-		unsigned int cmd, unsigned long arg)
-{
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->dev;
-	drm_ctx_t	ctx;
-	drm_ctx_t	__user *argp = (void __user *)arg;
-
-	if (copy_from_user(&ctx, argp, sizeof(ctx)))
-		return -EFAULT;
-	if ((ctx.handle = DRM(alloc_queue)(dev)) == DRM_KERNEL_CONTEXT) {
-				/* Init kernel's context and get a new one. */
-		DRM(init_queue)(dev, dev->queuelist[ctx.handle], &ctx);
-		ctx.handle = DRM(alloc_queue)(dev);
-	}
-	DRM(init_queue)(dev, dev->queuelist[ctx.handle], &ctx);
-	DRM_DEBUG("%d\n", ctx.handle);
-	if (copy_to_user(argp, &ctx, sizeof(ctx)))
-		return -EFAULT;
-	return 0;
-}
-
-int DRM(modctx)(struct inode *inode, struct file *filp,
-		unsigned int cmd, unsigned long arg)
-{
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->dev;
-	drm_ctx_t	ctx;
-	drm_queue_t	*q;
-
-	if (copy_from_user(&ctx, (drm_ctx_t __user *)arg, sizeof(ctx)))
-		return -EFAULT;
-
-	DRM_DEBUG("%d\n", ctx.handle);
-
-	if (ctx.handle < 0 || ctx.handle >= dev->queue_count) return -EINVAL;
-	q = dev->queuelist[ctx.handle];
-
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->use_count) == 1) {
-				/* No longer in use */
-		atomic_dec(&q->use_count);
-		return -EINVAL;
-	}
-
-	if (DRM_BUFCOUNT(&q->waitlist)) {
-		atomic_dec(&q->use_count);
-		return -EBUSY;
-	}
-
-	q->flags = ctx.flags;
-
-	atomic_dec(&q->use_count);
-	return 0;
-}
-
-int DRM(getctx)(struct inode *inode, struct file *filp,
-		unsigned int cmd, unsigned long arg)
-{
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->dev;
-	drm_ctx_t	__user *argp = (void __user *)arg;
-	drm_ctx_t	ctx;
-	drm_queue_t	*q;
-
-	if (copy_from_user(&ctx, argp, sizeof(ctx)))
-		return -EFAULT;
-
-	DRM_DEBUG("%d\n", ctx.handle);
-
-	if (ctx.handle >= dev->queue_count) return -EINVAL;
-	q = dev->queuelist[ctx.handle];
-
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->use_count) == 1) {
-				/* No longer in use */
-		atomic_dec(&q->use_count);
-		return -EINVAL;
-	}
-
-	ctx.flags = q->flags;
-	atomic_dec(&q->use_count);
-
-	if (copy_to_user(argp, &ctx, sizeof(ctx)))
-		return -EFAULT;
-
-	return 0;
-}
-
-int DRM(switchctx)(struct inode *inode, struct file *filp,
-		   unsigned int cmd, unsigned long arg)
-{
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->dev;
-	drm_ctx_t	ctx;
-
-	if (copy_from_user(&ctx, (drm_ctx_t __user *)arg, sizeof(ctx)))
-		return -EFAULT;
-	DRM_DEBUG("%d\n", ctx.handle);
-	return DRM(context_switch)(dev, dev->last_context, ctx.handle);
-}
-
-int DRM(newctx)(struct inode *inode, struct file *filp,
-		unsigned int cmd, unsigned long arg)
-{
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->dev;
-	drm_ctx_t	ctx;
-
-	if (copy_from_user(&ctx, (drm_ctx_t __user *)arg, sizeof(ctx)))
-		return -EFAULT;
-	DRM_DEBUG("%d\n", ctx.handle);
-	DRM(context_switch_complete)(dev, ctx.handle);
-
-	return 0;
-}
-
-int DRM(rmctx)(struct inode *inode, struct file *filp,
-	       unsigned int cmd, unsigned long arg)
-{
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->dev;
-	drm_ctx_t	ctx;
-	drm_queue_t	*q;
-	drm_buf_t	*buf;
-
-	if (copy_from_user(&ctx, (drm_ctx_t __user *)arg, sizeof(ctx)))
-		return -EFAULT;
-	DRM_DEBUG("%d\n", ctx.handle);
-
-	if (ctx.handle >= dev->queue_count) return -EINVAL;
-	q = dev->queuelist[ctx.handle];
-
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->use_count) == 1) {
-				/* No longer in use */
-		atomic_dec(&q->use_count);
-		return -EINVAL;
-	}
-
-	atomic_inc(&q->finalization); /* Mark queue in finalization state */
-	atomic_sub(2, &q->use_count); /* Mark queue as unused (pending
-					 finalization) */
-
-	while (test_and_set_bit(0, &dev->interrupt_flag)) {
-		schedule();
-		if (signal_pending(current)) {
-			clear_bit(0, &dev->interrupt_flag);
-			return -EINTR;
-		}
-	}
-				/* Remove queued buffers */
-	while ((buf = DRM(waitlist_get)(&q->waitlist))) {
-		DRM(free_buffer)(dev, buf);
-	}
-	clear_bit(0, &dev->interrupt_flag);
-
-				/* Wakeup blocked processes */
-	wake_up_interruptible(&q->read_queue);
-	wake_up_interruptible(&q->write_queue);
-	wake_up_interruptible(&q->flush_queue);
-
-				/* Finalization over.  Queue is made
-				   available when both use_count and
-				   finalization become 0, which won't
-				   happen until all the waiting processes
-				   stop waiting. */
-	atomic_dec(&q->finalization);
-	return 0;
-}
-

drivers/char/drm/gamma_dma.c

-/* gamma_dma.c -- DMA support for GMX 2000 -*- linux-c -*-
- * Created: Fri Mar 19 14:30:16 1999 by faith@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>
- *
- */
-
-#include "gamma.h"
-#include "drmP.h"
-#include "drm.h"
-#include "gamma_drm.h"
-#include "gamma_drv.h"
-
-#include <linux/interrupt.h>	/* For task queue support */
-#include <linux/delay.h>
-
-static inline void gamma_dma_dispatch(drm_device_t *dev, unsigned long address,
-				      unsigned long length)
-{
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-	mb();
-	while ( GAMMA_READ(GAMMA_INFIFOSPACE) < 2)
-		cpu_relax();
-
-	GAMMA_WRITE(GAMMA_DMAADDRESS, address);
-
-	while (GAMMA_READ(GAMMA_GCOMMANDSTATUS) != 4)
-		cpu_relax();
-
-	GAMMA_WRITE(GAMMA_DMACOUNT, length / 4);
-}
-
-void gamma_dma_quiescent_single(drm_device_t *dev)
-{
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-	while (GAMMA_READ(GAMMA_DMACOUNT))
-		cpu_relax();
-
-	while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2)
-		cpu_relax();
-
-	GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
-	GAMMA_WRITE(GAMMA_SYNC, 0);
-
-	do {
-		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
-			cpu_relax();
-	} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
-}
-
-void gamma_dma_quiescent_dual(drm_device_t *dev)
-{
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-	while (GAMMA_READ(GAMMA_DMACOUNT))
-		cpu_relax();
-
-	while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
-		cpu_relax();
-
-	GAMMA_WRITE(GAMMA_BROADCASTMASK, 3);
-	GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
-	GAMMA_WRITE(GAMMA_SYNC, 0);
-
-	/* Read from first MX */
-	do {
-		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
-			cpu_relax();
-	} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
-
-	/* Read from second MX */
-	do {
-		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000))
-			cpu_relax();
-	} while (GAMMA_READ(GAMMA_OUTPUTFIFO + 0x10000) != GAMMA_SYNC_TAG);
-}
-
-void gamma_dma_ready(drm_device_t *dev)
-{
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-	while (GAMMA_READ(GAMMA_DMACOUNT))
-		cpu_relax();
-}
-
-static inline int gamma_dma_is_ready(drm_device_t *dev)
-{
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-	return (!GAMMA_READ(GAMMA_DMACOUNT));
-}
-
-irqreturn_t gamma_driver_irq_handler( DRM_IRQ_ARGS )
-{
-	drm_device_t	 *dev = (drm_device_t *)arg;
-	drm_device_dma_t *dma = dev->dma;
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-
-	/* FIXME: should check whether we're actually interested in the interrupt? */
-	atomic_inc(&dev->counts[6]); /* _DRM_STAT_IRQ */
-
-	while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
-		cpu_relax();
-
-	GAMMA_WRITE(GAMMA_GDELAYTIMER, 0xc350/2); /* 0x05S */
-	GAMMA_WRITE(GAMMA_GCOMMANDINTFLAGS, 8);
-	GAMMA_WRITE(GAMMA_GINTFLAGS, 0x2001);
-	if (gamma_dma_is_ready(dev)) {
-				/* Free previous buffer */
-		if (test_and_set_bit(0, &dev->dma_flag))
-			return IRQ_HANDLED;
-		if (dma->this_buffer) {
-			gamma_free_buffer(dev, dma->this_buffer);
-			dma->this_buffer = NULL;
-		}
-		clear_bit(0, &dev->dma_flag);
-
-		/* Dispatch new buffer */
-		schedule_work(&dev->work);
-	}
-	return IRQ_HANDLED;
-}
-
-/* Only called by gamma_dma_schedule. */
-static int gamma_do_dma(drm_device_t *dev, int locked)
-{
-	unsigned long	 address;
-	unsigned long	 length;
-	drm_buf_t	 *buf;
-	int		 retcode = 0;
-	drm_device_dma_t *dma = dev->dma;
-
-	if (test_and_set_bit(0, &dev->dma_flag)) return -EBUSY;
-
-
-	if (!dma->next_buffer) {
-		DRM_ERROR("No next_buffer\n");
-		clear_bit(0, &dev->dma_flag);
-		return -EINVAL;
-	}
-
-	buf	= dma->next_buffer;
-	/* WE NOW ARE ON LOGICAL PAGES!! - using page table setup in dma_init */
-	/* So we pass the buffer index value into the physical page offset */
-	address = buf->idx << 12;
-	length	= buf->used;
-
-	DRM_DEBUG("context %d, buffer %d (%ld bytes)\n",
-		  buf->context, buf->idx, length);
-
-	if (buf->list == DRM_LIST_RECLAIM) {
-		gamma_clear_next_buffer(dev);
-		gamma_free_buffer(dev, buf);
-		clear_bit(0, &dev->dma_flag);
-		return -EINVAL;
-	}
-
-	if (!length) {
-		DRM_ERROR("0 length buffer\n");
-		gamma_clear_next_buffer(dev);
-		gamma_free_buffer(dev, buf);
-		clear_bit(0, &dev->dma_flag);
-		return 0;
-	}
-
-	if (!gamma_dma_is_ready(dev)) {
-		clear_bit(0, &dev->dma_flag);
-		return -EBUSY;
-	}
-
-	if (buf->while_locked) {
-		if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
-			DRM_ERROR("Dispatching buffer %d from pid %d"
-				  " \"while locked\", but no lock held\n",
-				  buf->idx, current->pid);
-		}
-	} else {
-		if (!locked && !gamma_lock_take(&dev->lock.hw_lock->lock,
-					      DRM_KERNEL_CONTEXT)) {
-			clear_bit(0, &dev->dma_flag);
-			return -EBUSY;
-		}
-	}
-
-	if (dev->last_context != buf->context
-	    && !(dev->queuelist[buf->context]->flags
-		 & _DRM_CONTEXT_PRESERVED)) {
-				/* PRE: dev->last_context != buf->context */
-		if (DRM(context_switch)(dev, dev->last_context,
-					buf->context)) {
-			DRM(clear_next_buffer)(dev);
-			DRM(free_buffer)(dev, buf);
-		}
-		retcode = -EBUSY;
-		goto cleanup;
-
-				/* POST: we will wait for the context
-				   switch and will dispatch on a later call
-				   when dev->last_context == buf->context.
-				   NOTE WE HOLD THE LOCK THROUGHOUT THIS
-				   TIME! */
-	}
-
-	gamma_clear_next_buffer(dev);
-	buf->pending	 = 1;
-	buf->waiting	 = 0;
-	buf->list	 = DRM_LIST_PEND;
-
-	/* WE NOW ARE ON LOGICAL PAGES!!! - overriding address */
-	address = buf->idx << 12;
-
-	gamma_dma_dispatch(dev, address, length);
-	gamma_free_buffer(dev, dma->this_buffer);
-	dma->this_buffer = buf;
-
-	atomic_inc(&dev->counts[7]); /* _DRM_STAT_DMA */
-	atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
-
-	if (!buf->while_locked && !dev->context_flag && !locked) {
-		if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
-				  DRM_KERNEL_CONTEXT)) {
-			DRM_ERROR("\n");
-		}
-	}
-cleanup:
-
-	clear_bit(0, &dev->dma_flag);
-
-
-	return retcode;
-}
-
-static void gamma_dma_timer_bh(unsigned long dev)
-{
-	gamma_dma_schedule((drm_device_t *)dev, 0);
-}
-
-void gamma_irq_immediate_bh(void *dev)
-{
-	gamma_dma_schedule(dev, 0);
-}
-
-int gamma_dma_schedule(drm_device_t *dev, int locked)
-{
-	int		 next;
-	drm_queue_t	 *q;
-	drm_buf_t	 *buf;
-	int		 retcode   = 0;
-	int		 processed = 0;
-	int		 missed;
-	int		 expire	   = 20;
-	drm_device_dma_t *dma	   = dev->dma;
-
-	if (test_and_set_bit(0, &dev->interrupt_flag)) {
-				/* Not reentrant */
-		atomic_inc(&dev->counts[10]); /* _DRM_STAT_MISSED */
-		return -EBUSY;
-	}
-	missed = atomic_read(&dev->counts[10]);
-
-
-again:
-	if (dev->context_flag) {
-		clear_bit(0, &dev->interrupt_flag);
-		return -EBUSY;
-	}
-	if (dma->next_buffer) {
-				/* Unsent buffer that was previously
-				   selected, but that couldn't be sent
-				   because the lock could not be obtained
-				   or the DMA engine wasn't ready.  Try
-				   again. */
-		if (!(retcode = gamma_do_dma(dev, locked))) ++processed;
-	} else {
-		do {
-			next = gamma_select_queue(dev, gamma_dma_timer_bh);
-			if (next >= 0) {
-				q   = dev->queuelist[next];
-				buf = gamma_waitlist_get(&q->waitlist);
-				dma->next_buffer = buf;
-				dma->next_queue	 = q;
-				if (buf && buf->list == DRM_LIST_RECLAIM) {
-					gamma_clear_next_buffer(dev);
-					gamma_free_buffer(dev, buf);
-				}
-			}
-		} while (next >= 0 && !dma->next_buffer);
-		if (dma->next_buffer) {
-			if (!(retcode = gamma_do_dma(dev, locked))) {
-				++processed;
-			}
-		}
-	}
-
-	if (--expire) {
-		if (missed != atomic_read(&dev->counts[10])) {
-			if (gamma_dma_is_ready(dev)) goto again;
-		}
-		if (processed && gamma_dma_is_ready(dev)) {
-			processed = 0;
-			goto again;
-		}
-	}
-
-	clear_bit(0, &dev->interrupt_flag);
-
-	return retcode;
-}
-
-static int gamma_dma_priority(struct file *filp, 
-			      drm_device_t *dev, drm_dma_t *d)
-{
-	unsigned long	  address;
-	unsigned long	  length;
-	int		  must_free = 0;
-	int		  retcode   = 0;
-	int		  i;
-	int		  idx;
-	drm_buf_t	  *buf;
-	drm_buf_t	  *last_buf = NULL;
-	drm_device_dma_t  *dma	    = dev->dma;
-	int		  *send_indices = NULL;
-	int		  *send_sizes = NULL;
-
-	DECLARE_WAITQUEUE(entry, current);
-
-				/* Turn off interrupt handling */
-	while (test_and_set_bit(0, &dev->interrupt_flag)) {
-		schedule();
-		if (signal_pending(current)) return -EINTR;
-	}
-	if (!(d->flags & _DRM_DMA_WHILE_LOCKED)) {
-		while (!gamma_lock_take(&dev->lock.hw_lock->lock,
-				      DRM_KERNEL_CONTEXT)) {
-			schedule();
-			if (signal_pending(current)) {
-				clear_bit(0, &dev->interrupt_flag);
-				return -EINTR;
-			}
-		}
-		++must_free;
-	}
-
-	send_indices = DRM(alloc)(d->send_count * sizeof(*send_indices),
-				  DRM_MEM_DRIVER);
-	if (send_indices == NULL)
-		return -ENOMEM;
-	if (copy_from_user(send_indices, d->send_indices, 
-			   d->send_count * sizeof(*send_indices))) {
-		retcode = -EFAULT;
-                goto cleanup;
-	}
-	
-	send_sizes = DRM(alloc)(d->send_count * sizeof(*send_sizes),
-				DRM_MEM_DRIVER);
-	if (send_sizes == NULL)
-		return -ENOMEM;
-	if (copy_from_user(send_sizes, d->send_sizes, 
-			   d->send_count * sizeof(*send_sizes))) {
-		retcode = -EFAULT;
-                goto cleanup;
-	}
-
-	for (i = 0; i < d->send_count; i++) {
-		idx = send_indices[i];
-		if (idx < 0 || idx >= dma->buf_count) {
-			DRM_ERROR("Index %d (of %d max)\n",
-				  send_indices[i], dma->buf_count - 1);
-			continue;
-		}
-		buf = dma->buflist[ idx ];
-		if (buf->filp != filp) {
-			DRM_ERROR("Process %d using buffer not owned\n",
-				  current->pid);
-			retcode = -EINVAL;
-			goto cleanup;
-		}
-		if (buf->list != DRM_LIST_NONE) {
-			DRM_ERROR("Process %d using buffer on list %d\n",
-				  current->pid, buf->list);
-			retcode = -EINVAL;
-			goto cleanup;
-		}
-				/* This isn't a race condition on
-				   buf->list, since our concern is the
-				   buffer reclaim during the time the
-				   process closes the /dev/drm? handle, so
-				   it can't also be doing DMA. */
-		buf->list	  = DRM_LIST_PRIO;
-		buf->used	  = send_sizes[i];
-		buf->context	  = d->context;
-		buf->while_locked = d->flags & _DRM_DMA_WHILE_LOCKED;
-		address		  = (unsigned long)buf->address;
-		length		  = buf->used;
-		if (!length) {
-			DRM_ERROR("0 length buffer\n");
-		}
-		if (buf->pending) {
-			DRM_ERROR("Sending pending buffer:"
-				  " buffer %d, offset %d\n",
-				  send_indices[i], i);
-			retcode = -EINVAL;
-			goto cleanup;
-		}
-		if (buf->waiting) {
-			DRM_ERROR("Sending waiting buffer:"
-				  " buffer %d, offset %d\n",
-				  send_indices[i], i);
-			retcode = -EINVAL;
-			goto cleanup;
-		}
-		buf->pending = 1;
-
-		if (dev->last_context != buf->context
-		    && !(dev->queuelist[buf->context]->flags
-			 & _DRM_CONTEXT_PRESERVED)) {
-			add_wait_queue(&dev->context_wait, &entry);
-			current->state = TASK_INTERRUPTIBLE;
-				/* PRE: dev->last_context != buf->context */
-			DRM(context_switch)(dev, dev->last_context,
-					    buf->context);
-				/* POST: we will wait for the context
-				   switch and will dispatch on a later call
-				   when dev->last_context == buf->context.
-				   NOTE WE HOLD THE LOCK THROUGHOUT THIS
-				   TIME! */
-			schedule();
-			current->state = TASK_RUNNING;
-			remove_wait_queue(&dev->context_wait, &entry);
-			if (signal_pending(current)) {
-				retcode = -EINTR;
-				goto cleanup;
-			}
-			if (dev->last_context != buf->context) {
-				DRM_ERROR("Context mismatch: %d %d\n",
-					  dev->last_context,
-					  buf->context);
-			}
-		}
-
-		gamma_dma_dispatch(dev, address, length);
-		atomic_inc(&dev->counts[9]); /* _DRM_STAT_SPECIAL */
-		atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
-
-		if (last_buf) {
-			gamma_free_buffer(dev, last_buf);
-		}
-		last_buf = buf;
-	}
-
-
-cleanup:
-	if (last_buf) {
-		gamma_dma_ready(dev);
-		gamma_free_buffer(dev, last_buf);
-	}
-	if (send_indices)
-		DRM(free)(send_indices, d->send_count * sizeof(*send_indices), 
-			  DRM_MEM_DRIVER);
-	if (send_sizes)
-		DRM(free)(send_sizes, d->send_count * sizeof(*send_sizes), 
-			  DRM_MEM_DRIVER);
-
-	if (must_free && !dev->context_flag) {
-		if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
-				  DRM_KERNEL_CONTEXT)) {
-			DRM_ERROR("\n");
-		}
-	}
-	clear_bit(0, &dev->interrupt_flag);
-	return retcode;
-}
-
-static int gamma_dma_send_buffers(struct file *filp,
-				  drm_device_t *dev, drm_dma_t *d)
-{
-	DECLARE_WAITQUEUE(entry, current);
-	drm_buf_t	  *last_buf = NULL;
-	int		  retcode   = 0;
-	drm_device_dma_t  *dma	    = dev->dma;
-	int               send_index;
-
-	if (get_user(send_index, &d->send_indices[d->send_count-1]))
-		return -EFAULT;
-
-	if (d->flags & _DRM_DMA_BLOCK) {
-		last_buf = dma->buflist[send_index];
-		add_wait_queue(&last_buf->dma_wait, &entry);
-	}
-
-	if ((retcode = gamma_dma_enqueue(filp, d))) {
-		if (d->flags & _DRM_DMA_BLOCK)
-			remove_wait_queue(&last_buf->dma_wait, &entry);
-		return retcode;
-	}
-
-	gamma_dma_schedule(dev, 0);
-
-	if (d->flags & _DRM_DMA_BLOCK) {
-		DRM_DEBUG("%d waiting\n", current->pid);
-		for (;;) {
-			current->state = TASK_INTERRUPTIBLE;
-			if (!last_buf->waiting && !last_buf->pending)
-				break; /* finished */
-			schedule();
-			if (signal_pending(current)) {
-				retcode = -EINTR; /* Can't restart */
-				break;
-			}
-		}
-		current->state = TASK_RUNNING;
-		DRM_DEBUG("%d running\n", current->pid);
-		remove_wait_queue(&last_buf->dma_wait, &entry);
-		if (!retcode
-		    || (last_buf->list==DRM_LIST_PEND && !last_buf->pending)) {
-			if (!waitqueue_active(&last_buf->dma_wait)) {
-				gamma_free_buffer(dev, last_buf);
-			}
-		}
-		if (retcode) {
-			DRM_ERROR("ctx%d w%d p%d c%ld i%d l%d pid:%d\n",
-				  d->context,
-				  last_buf->waiting,
-				  last_buf->pending,
-				  (long)DRM_WAITCOUNT(dev, d->context),
-				  last_buf->idx,
-				  last_buf->list,
-				  current->pid);
-		}
-	}
-	return retcode;
-}
-
-int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
-	      unsigned long arg)
-{
-	drm_file_t	  *priv	    = filp->private_data;
-	drm_device_t	  *dev	    = priv->dev;
-	drm_device_dma_t  *dma	    = dev->dma;
-	int		  retcode   = 0;
-	drm_dma_t	  __user *argp = (void __user *)arg;
-	drm_dma_t	  d;
-
-	if (copy_from_user(&d, argp, sizeof(d)))
-		return -EFAULT;
-
-	if (d.send_count < 0 || d.send_count > dma->buf_count) {
-		DRM_ERROR("Process %d trying to send %d buffers (of %d max)\n",
-			  current->pid, d.send_count, dma->buf_count);
-		return -EINVAL;
-	}
-
-	if (d.request_count < 0 || d.request_count > dma->buf_count) {
-		DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
-			  current->pid, d.request_count, dma->buf_count);
-		return -EINVAL;
-	}
-
-	if (d.send_count) {
-		if (d.flags & _DRM_DMA_PRIORITY)
-			retcode = gamma_dma_priority(filp, dev, &d);
-		else
-			retcode = gamma_dma_send_buffers(filp, dev, &d);
-	}
-
-	d.granted_count = 0;
-
-	if (!retcode && d.request_count) {
-		retcode = gamma_dma_get_buffers(filp, &d);
-	}
-
-	DRM_DEBUG("%d returning, granted = %d\n",
-		  current->pid, d.granted_count);
-	if (copy_to_user(argp, &d, sizeof(d)))
-		return -EFAULT;
-
-	return retcode;
-}
-
-/* =============================================================
- * DMA initialization, cleanup
- */
-
-static int gamma_do_init_dma( drm_device_t *dev, drm_gamma_init_t *init )
-{
-	drm_gamma_private_t *dev_priv;
-	drm_device_dma_t    *dma = dev->dma;
-	drm_buf_t	    *buf;
-	int i;
-	struct list_head    *list;
-	unsigned long	    *pgt;
-
-	DRM_DEBUG( "%s\n", __FUNCTION__ );
-
-	dev_priv = DRM(alloc)( sizeof(drm_gamma_private_t),
-							DRM_MEM_DRIVER );
-	if ( !dev_priv )
-		return -ENOMEM;
-
-	dev->dev_private = (void *)dev_priv;
-
-	memset( dev_priv, 0, sizeof(drm_gamma_private_t) );
-
-	dev_priv->num_rast = init->num_rast;
-
-	list_for_each(list, &dev->maplist->head) {
-		drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
-		if( r_list->map &&
-		    r_list->map->type == _DRM_SHM &&
-		    r_list->map->flags & _DRM_CONTAINS_LOCK ) {
-			dev_priv->sarea = r_list->map;
- 			break;
- 		}
- 	}
-	
-	dev_priv->mmio0 = drm_core_findmap(dev, init->mmio0);
-	dev_priv->mmio1 = drm_core_findmap(dev, init->mmio1);
-	dev_priv->mmio2 = drm_core_findmap(dev, init->mmio2);
-	dev_priv->mmio3 = drm_core_findmap(dev, init->mmio3);
-	
-	dev_priv->sarea_priv = (drm_gamma_sarea_t *)
-		((u8 *)dev_priv->sarea->handle +
-		 init->sarea_priv_offset);
-
-	if (init->pcimode) {
-		buf = dma->buflist[GLINT_DRI_BUF_COUNT];
-		pgt = buf->address;
-
- 		for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) {
-			buf = dma->buflist[i];
-			*pgt = virt_to_phys((void*)buf->address) | 0x07;
-			pgt++;
-		}
-
-		buf = dma->buflist[GLINT_DRI_BUF_COUNT];
-	} else {
-		dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
-		drm_core_ioremap( dev->agp_buffer_map, dev);
-
-		buf = dma->buflist[GLINT_DRI_BUF_COUNT];
-		pgt = buf->address;
-
- 		for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) {
-			buf = dma->buflist[i];
-			*pgt = (unsigned long)buf->address + 0x07;
-			pgt++;
-		}
-
-		buf = dma->buflist[GLINT_DRI_BUF_COUNT];
-
-		while (GAMMA_READ(GAMMA_INFIFOSPACE) < 1);
-		GAMMA_WRITE( GAMMA_GDMACONTROL, 0xe);
-	}
-	while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
-	GAMMA_WRITE( GAMMA_PAGETABLEADDR, virt_to_phys((void*)buf->address) );
-	GAMMA_WRITE( GAMMA_PAGETABLELENGTH, 2 );
-
-	return 0;
-}
-
-int gamma_do_cleanup_dma( drm_device_t *dev )
-{
-	DRM_DEBUG( "%s\n", __FUNCTION__ );
-
-	/* 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))
-		if ( dev->irq_enabled ) 
-			DRM(irq_uninstall)(dev);
-
-	if ( dev->dev_private ) {
-
-		if ( dev->agp_buffer_map != NULL )
-			drm_core_ioremapfree( dev->agp_buffer_map, dev );
-
-		DRM(free)( dev->dev_private, sizeof(drm_gamma_private_t),
-			   DRM_MEM_DRIVER );
-		dev->dev_private = NULL;
-	}
-
-	return 0;
-}
-
-int gamma_dma_init( struct inode *inode, struct file *filp,
-		  unsigned int cmd, unsigned long arg )
-{
-	drm_file_t *priv = filp->private_data;
-	drm_device_t *dev = priv->dev;
-	drm_gamma_init_t init;
-
-	LOCK_TEST_WITH_RETURN( dev, filp );
-
-	if ( copy_from_user( &init, (drm_gamma_init_t __user *)arg, sizeof(init) ) )
-		return -EFAULT;
-
-	switch ( init.func ) {
-	case GAMMA_INIT_DMA:
-		return gamma_do_init_dma( dev, &init );
-	case GAMMA_CLEANUP_DMA:
-		return gamma_do_cleanup_dma( dev );
-	}
-
-	return -EINVAL;
-}
-
-static int gamma_do_copy_dma( drm_device_t *dev, drm_gamma_copy_t *copy )
-{
-	drm_device_dma_t    *dma = dev->dma;
-	unsigned int        *screenbuf;
-
-	DRM_DEBUG( "%s\n", __FUNCTION__ );
-
-	/* We've DRM_RESTRICTED this DMA buffer */
-
-	screenbuf = dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ]->address;
-
-#if 0
-	*buffer++ = 0x180;	/* Tag (FilterMode) */
-	*buffer++ = 0x200;	/* Allow FBColor through */
-	*buffer++ = 0x53B;	/* Tag */
-	*buffer++ = copy->Pitch;
-	*buffer++ = 0x53A;	/* Tag */
-	*buffer++ = copy->SrcAddress;
-	*buffer++ = 0x539;	/* Tag */
-	*buffer++ = copy->WidthHeight; /* Initiates transfer */
-	*buffer++ = 0x53C;	/* Tag - DMAOutputAddress */
-	*buffer++ = virt_to_phys((void*)screenbuf);
-	*buffer++ = 0x53D;	/* Tag - DMAOutputCount */
-	*buffer++ = copy->Count; /* Reads HostOutFifo BLOCKS until ..*/
-
-	/* Data now sitting in dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ] */
-	/* Now put it back to the screen */
-
-	*buffer++ = 0x180;	/* Tag (FilterMode) */
-	*buffer++ = 0x400;	/* Allow Sync through */
-	*buffer++ = 0x538;	/* Tag - DMARectangleReadTarget */
-	*buffer++ = 0x155;	/* FBSourceData | count */
-	*buffer++ = 0x537;	/* Tag */
-	*buffer++ = copy->Pitch;
-	*buffer++ = 0x536;	/* Tag */
-	*buffer++ = copy->DstAddress;
-	*buffer++ = 0x535;	/* Tag */
-	*buffer++ = copy->WidthHeight; /* Initiates transfer */
-	*buffer++ = 0x530;	/* Tag - DMAAddr */
-	*buffer++ = virt_to_phys((void*)screenbuf);
-	*buffer++ = 0x531;
-	*buffer++ = copy->Count; /* initiates DMA transfer of color data */
-#endif
-
-	/* need to dispatch it now */
-
-	return 0;
-}
-
-int gamma_dma_copy( struct inode *inode, struct file *filp,
-		  unsigned int cmd, unsigned long arg )
-{
-	drm_file_t *priv = filp->private_data;
-	drm_device_t *dev = priv->dev;
-	drm_gamma_copy_t copy;
-
-	if ( copy_from_user( &copy, (drm_gamma_copy_t __user *)arg, sizeof(copy) ) )
-		return -EFAULT;
-
-	return gamma_do_copy_dma( dev, &copy );
-}
-
-/* =============================================================
- * Per Context SAREA Support
- */
-
-int gamma_getsareactx(struct inode *inode, struct file *filp,
-		     unsigned int cmd, unsigned long arg)
-{
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->dev;
-	drm_ctx_priv_map_t __user *argp = (void __user *)arg;
-	drm_ctx_priv_map_t request;
-	drm_map_t *map;
-
-	if (copy_from_user(&request, argp, sizeof(request)))
-		return -EFAULT;
-
-	down(&dev->struct_sem);
-	if ((int)request.ctx_id >= dev->max_context) {
-		up(&dev->struct_sem);
-		return -EINVAL;
-	}
-
-	map = dev->context_sareas[request.ctx_id];
-	up(&dev->struct_sem);
-
-	request.handle = map->handle;
-	if (copy_to_user(argp, &request, sizeof(request)))
-		return -EFAULT;
-	return 0;
-}
-
-int gamma_setsareactx(struct inode *inode, struct file *filp,
-		     unsigned int cmd, unsigned long arg)
-{
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->dev;
-	drm_ctx_priv_map_t request;
-	drm_map_t *map = NULL;
-	drm_map_list_t *r_list;
-	struct list_head *list;
-
-	if (copy_from_user(&request,
-			   (drm_ctx_priv_map_t __user *)arg,
-			   sizeof(request)))
-		return -EFAULT;
-
-	down(&dev->struct_sem);
-	r_list = NULL;
-	list_for_each(list, &dev->maplist->head) {
-		r_list = list_entry(list, drm_map_list_t, head);
-		if(r_list->map &&
-		   r_list->map->handle == request.handle) break;
-	}
-	if (list == &(dev->maplist->head)) {
-		up(&dev->struct_sem);
-		return -EINVAL;
-	}
-	map = r_list->map;
-	up(&dev->struct_sem);
-
-	if (!map) return -EINVAL;
-
-	down(&dev->struct_sem);
-	if ((int)request.ctx_id >= dev->max_context) {
-		up(&dev->struct_sem);
-		return -EINVAL;
-	}
-	dev->context_sareas[request.ctx_id] = map;
-	up(&dev->struct_sem);
-	return 0;
-}
-
-void gamma_driver_irq_preinstall( drm_device_t *dev ) {
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-
-	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2)
-		cpu_relax();
-
-	GAMMA_WRITE( GAMMA_GCOMMANDMODE,	0x00000004 );
-	GAMMA_WRITE( GAMMA_GDMACONTROL,		0x00000000 );
-}
-
-void gamma_driver_irq_postinstall( drm_device_t *dev ) {
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-
-	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
-		cpu_relax();
-
-	GAMMA_WRITE( GAMMA_GINTENABLE,		0x00002001 );
-	GAMMA_WRITE( GAMMA_COMMANDINTENABLE,	0x00000008 );
-	GAMMA_WRITE( GAMMA_GDELAYTIMER,		0x00039090 );
-}
-
-void gamma_driver_irq_uninstall( drm_device_t *dev ) {
-	drm_gamma_private_t *dev_priv =
-				(drm_gamma_private_t *)dev->dev_private;
-	if (!dev_priv)
-		return;
-
-	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
-		cpu_relax();
-
-	GAMMA_WRITE( GAMMA_GDELAYTIMER,		0x00000000 );
-	GAMMA_WRITE( GAMMA_COMMANDINTENABLE,	0x00000000 );
-	GAMMA_WRITE( GAMMA_GINTENABLE,		0x00000000 );
-}
-
-extern drm_ioctl_desc_t DRM(ioctls)[];
-
-static int gamma_driver_preinit(drm_device_t *dev)
-{
-	/* reset the finish ioctl */
-	DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_FINISH)].func = DRM(finish);
-	return 0;
-}
-
-static void gamma_driver_pretakedown(drm_device_t *dev)
-{
-	gamma_do_cleanup_dma(dev);
-}
-
-static void gamma_driver_dma_ready(drm_device_t *dev)
-{
-	gamma_dma_ready(dev);
-}
-
-static int gamma_driver_dma_quiescent(drm_device_t *dev)
-{
-	drm_gamma_private_t *dev_priv =	(
-		drm_gamma_private_t *)dev->dev_private;
-	if (dev_priv->num_rast == 2)
-		gamma_dma_quiescent_dual(dev);
-	else gamma_dma_quiescent_single(dev);
-	return 0;
-}
-
-void gamma_driver_register_fns(drm_device_t *dev)
-{
-	dev->driver_features = DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA | DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ;
-	DRM(fops).read = gamma_fops_read;
-	DRM(fops).poll = gamma_fops_poll;
-	dev->driver.preinit = gamma_driver_preinit;
-	dev->driver.pretakedown = gamma_driver_pretakedown;
-	dev->driver.dma_ready = gamma_driver_dma_ready;
-	dev->driver.dma_quiescent = gamma_driver_dma_quiescent;
-	dev->driver.dma_flush_block_and_flush = gamma_flush_block_and_flush;
-	dev->driver.dma_flush_unblock = gamma_flush_unblock;
-}

drivers/char/drm/gamma_drm.h

-#ifndef _GAMMA_DRM_H_
-#define _GAMMA_DRM_H_
-
-typedef struct _drm_gamma_tex_region {
-	unsigned char next, prev; /* indices to form a circular LRU  */
-	unsigned char in_use;	/* owned by a client, or free? */
-	int age;		/* tracked by clients to update local LRU's */
-} drm_gamma_tex_region_t;
-
-typedef struct {
-	unsigned int	GDeltaMode;
-	unsigned int	GDepthMode;
-	unsigned int	GGeometryMode;
-	unsigned int	GTransformMode;
-} drm_gamma_context_regs_t;
-
-typedef struct _drm_gamma_sarea {
-   	drm_gamma_context_regs_t context_state;
-
-	unsigned int dirty;
-
-
-	/* Maintain an LRU of contiguous regions of texture space.  If
-	 * you think you own a region of texture memory, and it has an
-	 * age different to the one you set, then you are mistaken and
-	 * it has been stolen by another client.  If global texAge
-	 * hasn't changed, there is no need to walk the list.
-	 *
-	 * These regions can be used as a proxy for the fine-grained
-	 * texture information of other clients - by maintaining them
-	 * in the same lru which is used to age their own textures,
-	 * clients have an approximate lru for the whole of global
-	 * texture space, and can make informed decisions as to which
-	 * areas to kick out.  There is no need to choose whether to
-	 * kick out your own texture or someone else's - simply eject
-	 * them all in LRU order.  
-	 */
-   
-#define GAMMA_NR_TEX_REGIONS 64
-	drm_gamma_tex_region_t texList[GAMMA_NR_TEX_REGIONS+1]; 
-				/* Last elt is sentinal */
-        int texAge;		/* last time texture was uploaded */
-        int last_enqueue;	/* last time a buffer was enqueued */
-	int last_dispatch;	/* age of the most recently dispatched buffer */
-	int last_quiescent;     /*  */
-	int ctxOwner;		/* last context to upload state */
-
-	int vertex_prim;
-} drm_gamma_sarea_t;
-
-/* WARNING: If you change any of these defines, make sure to change the
- * defines in the Xserver file (xf86drmGamma.h)
- */
-
-/* Gamma specific ioctls
- * The device specific ioctl range is 0x40 to 0x79.
- */
-#define DRM_IOCTL_GAMMA_INIT		DRM_IOW( 0x40, drm_gamma_init_t)
-#define DRM_IOCTL_GAMMA_COPY		DRM_IOW( 0x41, drm_gamma_copy_t)
-
-typedef struct drm_gamma_copy {
-	unsigned int	DMAOutputAddress;
-	unsigned int	DMAOutputCount;
-	unsigned int	DMAReadGLINTSource;
-	unsigned int	DMARectangleWriteAddress;
-	unsigned int	DMARectangleWriteLinePitch;
-	unsigned int	DMARectangleWrite;
-	unsigned int	DMARectangleReadAddress;
-	unsigned int	DMARectangleReadLinePitch;
-	unsigned int	DMARectangleRead;
-	unsigned int	DMARectangleReadTarget;
-} drm_gamma_copy_t;
-
-typedef struct drm_gamma_init {
-   	enum {
-	   	GAMMA_INIT_DMA    = 0x01,
-	       	GAMMA_CLEANUP_DMA = 0x02
-	} func;
-
-   	int sarea_priv_offset;
-	int pcimode;
-	unsigned int mmio0;
-	unsigned int mmio1;
-	unsigned int mmio2;
-	unsigned int mmio3;
-	unsigned int buffers_offset;
-	int num_rast;
-} drm_gamma_init_t;
-
-#endif /* _GAMMA_DRM_H_ */

drivers/char/drm/gamma_drv.c

-/* gamma.c -- 3dlabs GMX 2000 driver -*- linux-c -*-
- * Created: Mon Jan  4 08:58:31 1999 by faith@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>
- *    Gareth Hughes <gareth@valinux.com>
- */
-
-#include <linux/config.h>
-#include "gamma.h"
-#include "drmP.h"
-#include "drm.h"
-#include "gamma_drm.h"
-#include "gamma_drv.h"
-
-#include "drm_auth.h"
-#include "drm_agpsupport.h"
-#include "drm_bufs.h"
-#include "gamma_context.h"	/* NOTE! */
-#include "drm_dma.h"
-#include "gamma_old_dma.h"	/* NOTE */
-#include "drm_drawable.h"
-#include "drm_drv.h"
-
-#include "drm_fops.h"
-#include "drm_init.h"
-#include "drm_ioctl.h"
-#include "drm_irq.h"
-#include "gamma_lists.h"        /* NOTE */
-#include "drm_lock.h"
-#include "gamma_lock.h"		/* NOTE */
-#include "drm_memory.h"
-#include "drm_proc.h"
-#include "drm_vm.h"
-#include "drm_stub.h"
-#include "drm_scatter.h"

drivers/char/drm/gamma_drv.h

-/* gamma_drv.h -- Private header for 3dlabs GMX 2000 driver -*- linux-c -*-
- * Created: Mon Jan  4 10:05:05 1999 by faith@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>
- *
- */
-
-#ifndef _GAMMA_DRV_H_
-#define _GAMMA_DRV_H_
-
-typedef struct drm_gamma_private {
-	drm_gamma_sarea_t *sarea_priv;
-	drm_map_t *sarea;
-	drm_map_t *mmio0;
-	drm_map_t *mmio1;
-	drm_map_t *mmio2;
-	drm_map_t *mmio3;
-	int num_rast;
-} drm_gamma_private_t;
-
-				/* gamma_dma.c */
-extern int gamma_dma_init( struct inode *inode, struct file *filp,
-			 unsigned int cmd, unsigned long arg );
-extern int gamma_dma_copy( struct inode *inode, struct file *filp,
-			 unsigned int cmd, unsigned long arg );
-
-extern int gamma_do_cleanup_dma( drm_device_t *dev );
-extern void gamma_dma_ready(drm_device_t *dev);
-extern void gamma_dma_quiescent_single(drm_device_t *dev);
-extern void gamma_dma_quiescent_dual(drm_device_t *dev);
-
-				/* gamma_dma.c */
-extern int  gamma_dma_schedule(drm_device_t *dev, int locked);
-extern int  gamma_dma(struct inode *inode, struct file *filp,
-		      unsigned int cmd, unsigned long arg);
-extern int  gamma_find_devices(void);
-extern int  gamma_found(void);
-
-/* Gamma-specific code pulled from drm_fops.h:
- */
-extern int	     DRM(finish)(struct inode *inode, struct file *filp,
-				 unsigned int cmd, unsigned long arg);
-extern int	     DRM(flush_unblock)(drm_device_t *dev, int context,
-					drm_lock_flags_t flags);
-extern int	     DRM(flush_block_and_flush)(drm_device_t *dev, int context,
-						drm_lock_flags_t flags);
-
-/* Gamma-specific code pulled from drm_dma.h:
- */
-extern void	     DRM(clear_next_buffer)(drm_device_t *dev);
-extern int	     DRM(select_queue)(drm_device_t *dev,
-				       void (*wrapper)(unsigned long));
-extern int	     DRM(dma_enqueue)(struct file *filp, drm_dma_t *dma);
-extern int	     DRM(dma_get_buffers)(struct file *filp, drm_dma_t *dma);
-
-
-/* Gamma-specific code pulled from drm_lists.h (now renamed gamma_lists.h):
- */
-extern int	     DRM(waitlist_create)(drm_waitlist_t *bl, int count);
-extern int	     DRM(waitlist_destroy)(drm_waitlist_t *bl);
-extern int	     DRM(waitlist_put)(drm_waitlist_t *bl, drm_buf_t *buf);
-extern drm_buf_t     *DRM(waitlist_get)(drm_waitlist_t *bl);
-extern int	     DRM(freelist_create)(drm_freelist_t *bl, int count);
-extern int	     DRM(freelist_destroy)(drm_freelist_t *bl);
-extern int	     DRM(freelist_put)(drm_device_t *dev, drm_freelist_t *bl,
-				       drm_buf_t *buf);
-extern drm_buf_t     *DRM(freelist_get)(drm_freelist_t *bl, int block);
-
-/* externs for gamma changes to the ops */
-extern struct file_operations DRM(fops);
-extern unsigned int gamma_fops_poll(struct file *filp, struct poll_table_struct *wait);
-extern ssize_t gamma_fops_read(struct file *filp, char __user *buf, size_t count, loff_t *off);
-
-
-#define GLINT_DRI_BUF_COUNT 256
-
-#define GAMMA_OFF(reg)						   \
-	((reg < 0x1000)						   \
-	 ? reg							   \
-	 : ((reg < 0x10000)					   \
-	    ? (reg - 0x1000)					   \
-	    : ((reg < 0x11000)					   \
-	       ? (reg - 0x10000)				   \
-	       : (reg - 0x11000))))
-
-#define GAMMA_BASE(reg)	 ((unsigned long)				     \
-			  ((reg < 0x1000)    ? dev_priv->mmio0->handle :     \
-			   ((reg < 0x10000)  ? dev_priv->mmio1->handle :     \
-			    ((reg < 0x11000) ? dev_priv->mmio2->handle :     \
-					       dev_priv->mmio3->handle))))
-#define GAMMA_ADDR(reg)	 (GAMMA_BASE(reg) + GAMMA_OFF(reg))
-#define GAMMA_DEREF(reg) *(__volatile__ int *)GAMMA_ADDR(reg)
-#define GAMMA_READ(reg)	 GAMMA_DEREF(reg)
-#define GAMMA_WRITE(reg,val) do { GAMMA_DEREF(reg) = val; } while (0)
-
-#define GAMMA_BROADCASTMASK    0x9378
-#define GAMMA_COMMANDINTENABLE 0x0c48
-#define GAMMA_DMAADDRESS       0x0028
-#define GAMMA_DMACOUNT	       0x0030
-#define GAMMA_FILTERMODE       0x8c00
-#define GAMMA_GCOMMANDINTFLAGS 0x0c50
-#define GAMMA_GCOMMANDMODE     0x0c40
-#define		GAMMA_QUEUED_DMA_MODE		1<<1
-#define GAMMA_GCOMMANDSTATUS   0x0c60
-#define GAMMA_GDELAYTIMER      0x0c38
-#define GAMMA_GDMACONTROL      0x0060
-#define 	GAMMA_USE_AGP			1<<1
-#define GAMMA_GINTENABLE       0x0808
-#define GAMMA_GINTFLAGS	       0x0810
-#define GAMMA_INFIFOSPACE      0x0018
-#define GAMMA_OUTFIFOWORDS     0x0020
-#define GAMMA_OUTPUTFIFO       0x2000
-#define GAMMA_SYNC	       0x8c40
-#define GAMMA_SYNC_TAG	       0x0188
-#define GAMMA_PAGETABLEADDR    0x0C00
-#define GAMMA_PAGETABLELENGTH  0x0C08
-
-#define GAMMA_PASSTHROUGH	0x1FE
-#define GAMMA_DMAADDRTAG	0x530
-#define GAMMA_DMACOUNTTAG	0x531
-#define GAMMA_COMMANDINTTAG	0x532
-
-#endif

drivers/char/drm/gamma_lists.h

-/* drm_lists.h -- Buffer list handling routines -*- linux-c -*-
- * Created: Mon Apr 19 20:54:22 1999 by faith@valinux.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
- * VA LINUX SYSTEMS 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>
- *    Gareth Hughes <gareth@valinux.com>
- */
-
-#include "drmP.h"
-
-
-int DRM(waitlist_create)(drm_waitlist_t *bl, int count)
-{
-	if (bl->count) return -EINVAL;
-
-	bl->bufs       = DRM(alloc)((bl->count + 2) * sizeof(*bl->bufs),
-				    DRM_MEM_BUFLISTS);
-
-	if(!bl->bufs) return -ENOMEM;
-	memset(bl->bufs, 0, sizeof(*bl->bufs));
-	bl->count      = count;
-	bl->rp	       = bl->bufs;
-	bl->wp	       = bl->bufs;
-	bl->end	       = &bl->bufs[bl->count+1];
-	spin_lock_init(&bl->write_lock);
-	spin_lock_init(&bl->read_lock);
-	return 0;
-}
-
-int DRM(waitlist_destroy)(drm_waitlist_t *bl)
-{
-	if (bl->rp != bl->wp) return -EINVAL;
-	if (bl->bufs) DRM(free)(bl->bufs,
-				(bl->count + 2) * sizeof(*bl->bufs),
-				DRM_MEM_BUFLISTS);
-	bl->count = 0;
-	bl->bufs  = NULL;
-	bl->rp	  = NULL;
-	bl->wp	  = NULL;
-	bl->end	  = NULL;
-	return 0;
-}
-
-int DRM(waitlist_put)(drm_waitlist_t *bl, drm_buf_t *buf)
-{
-	int	      left;
-	unsigned long flags;
-
-	left = DRM_LEFTCOUNT(bl);
-	if (!left) {
-		DRM_ERROR("Overflow while adding buffer %d from filp %p\n",
-			  buf->idx, buf->filp);
-		return -EINVAL;
-	}
-	buf->list	 = DRM_LIST_WAIT;
-
-	spin_lock_irqsave(&bl->write_lock, flags);
-	*bl->wp = buf;
-	if (++bl->wp >= bl->end) bl->wp = bl->bufs;
-	spin_unlock_irqrestore(&bl->write_lock, flags);
-
-	return 0;
-}
-
-drm_buf_t *DRM(waitlist_get)(drm_waitlist_t *bl)
-{
-	drm_buf_t     *buf;
-	unsigned long flags;
-
-	spin_lock_irqsave(&bl->read_lock, flags);
-	buf = *bl->rp;
-	if (bl->rp == bl->wp) {
-		spin_unlock_irqrestore(&bl->read_lock, flags);
-		return NULL;
-	}
-	if (++bl->rp >= bl->end) bl->rp = bl->bufs;
-	spin_unlock_irqrestore(&bl->read_lock, flags);
-
-	return buf;
-}
-
-int DRM(freelist_create)(drm_freelist_t *bl, int count)
-{
-	atomic_set(&bl->count, 0);
-	bl->next      = NULL;
-	init_waitqueue_head(&bl->waiting);
-	bl->low_mark  = 0;
-	bl->high_mark = 0;
-	atomic_set(&bl->wfh,   0);
-	spin_lock_init(&bl->lock);
-	++bl->initialized;
-	return 0;
-}
-
-int DRM(freelist_destroy)(drm_freelist_t *bl)
-{
-	atomic_set(&bl->count, 0);
-	bl->next = NULL;
-	return 0;
-}
-
-int DRM(freelist_put)(drm_device_t *dev, drm_freelist_t *bl, drm_buf_t *buf)
-{
-	drm_device_dma_t *dma  = dev->dma;
-
-	if (!dma) {
-		DRM_ERROR("No DMA support\n");
-		return 1;
-	}
-
-	if (buf->waiting || buf->pending || buf->list == DRM_LIST_FREE) {
-		DRM_ERROR("Freed buffer %d: w%d, p%d, l%d\n",
-			  buf->idx, buf->waiting, buf->pending, buf->list);
-	}
-	if (!bl) return 1;
-	buf->list	= DRM_LIST_FREE;
-
-	spin_lock(&bl->lock);
-	buf->next	= bl->next;
-	bl->next	= buf;
-	spin_unlock(&bl->lock);
-
-	atomic_inc(&bl->count);
-	if (atomic_read(&bl->count) > dma->buf_count) {
-		DRM_ERROR("%d of %d buffers free after addition of %d\n",
-			  atomic_read(&bl->count), dma->buf_count, buf->idx);
-		return 1;
-	}
-				/* Check for high water mark */
-	if (atomic_read(&bl->wfh) && atomic_read(&bl->count)>=bl->high_mark) {
-		atomic_set(&bl->wfh, 0);
-		wake_up_interruptible(&bl->waiting);
-	}
-	return 0;
-}
-
-static drm_buf_t *DRM(freelist_try)(drm_freelist_t *bl)
-{
-	drm_buf_t	  *buf;
-
-	if (!bl) return NULL;
-
-				/* Get buffer */
-	spin_lock(&bl->lock);
-	if (!bl->next) {
-		spin_unlock(&bl->lock);
-		return NULL;
-	}
-	buf	  = bl->next;
-	bl->next  = bl->next->next;
-	spin_unlock(&bl->lock);
-
-	atomic_dec(&bl->count);
-	buf->next = NULL;
-	buf->list = DRM_LIST_NONE;
-	if (buf->waiting || buf->pending) {
-		DRM_ERROR("Free buffer %d: w%d, p%d, l%d\n",
-			  buf->idx, buf->waiting, buf->pending, buf->list);
-	}
-
-	return buf;
-}
-
-drm_buf_t *DRM(freelist_get)(drm_freelist_t *bl, int block)
-{
-	drm_buf_t	  *buf	= NULL;
-	DECLARE_WAITQUEUE(entry, current);
-
-	if (!bl || !bl->initialized) return NULL;
-
-				/* Check for low water mark */
-	if (atomic_read(&bl->count) <= bl->low_mark) /* Became low */
-		atomic_set(&bl->wfh, 1);
-	if (atomic_read(&bl->wfh)) {
-		if (block) {
-			add_wait_queue(&bl->waiting, &entry);
-			for (;;) {
-				current->state = TASK_INTERRUPTIBLE;
-				if (!atomic_read(&bl->wfh)
-				    && (buf = DRM(freelist_try)(bl))) break;
-				schedule();
-				if (signal_pending(current)) break;
-			}
-			current->state = TASK_RUNNING;
-			remove_wait_queue(&bl->waiting, &entry);
-		}
-		return buf;
-	}
-
-	return DRM(freelist_try)(bl);
-}
-

drivers/char/drm/gamma_lock.h

-/* lock.c -- IOCTLs for locking -*- linux-c -*-
- * Created: Tue Feb  2 08:37:54 1999 by faith@valinux.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
- * VA LINUX SYSTEMS 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>
- *    Gareth Hughes <gareth@valinux.com>
- */
-
-
-/* Gamma-specific code extracted from drm_lock.h:
- */
-static int DRM(flush_queue)(drm_device_t *dev, int context)
-{
-	DECLARE_WAITQUEUE(entry, current);
-	int		  ret	= 0;
-	drm_queue_t	  *q	= dev->queuelist[context];
-
-	DRM_DEBUG("\n");
-
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->use_count) > 1) {
-		atomic_inc(&q->block_write);
-		add_wait_queue(&q->flush_queue, &entry);
-		atomic_inc(&q->block_count);
-		for (;;) {
-			current->state = TASK_INTERRUPTIBLE;
-			if (!DRM_BUFCOUNT(&q->waitlist)) break;
-			schedule();
-			if (signal_pending(current)) {
-				ret = -EINTR; /* Can't restart */
-				break;
-			}
-		}
-		atomic_dec(&q->block_count);
-		current->state = TASK_RUNNING;
-		remove_wait_queue(&q->flush_queue, &entry);
-	}
-	atomic_dec(&q->use_count);
-
-				/* NOTE: block_write is still incremented!
-				   Use drm_flush_unlock_queue to decrement. */
-	return ret;
-}
-
-static int DRM(flush_unblock_queue)(drm_device_t *dev, int context)
-{
-	drm_queue_t	  *q	= dev->queuelist[context];
-
-	DRM_DEBUG("\n");
-
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->use_count) > 1) {
-		if (atomic_read(&q->block_write)) {
-			atomic_dec(&q->block_write);
-			wake_up_interruptible(&q->write_queue);
-		}
-	}
-	atomic_dec(&q->use_count);
-	return 0;
-}
-
-int DRM(flush_block_and_flush)(drm_device_t *dev, int context,
-			       drm_lock_flags_t flags)
-{
-	int ret = 0;
-	int i;
-
-	DRM_DEBUG("\n");
-
-	if (flags & _DRM_LOCK_FLUSH) {
-		ret = DRM(flush_queue)(dev, DRM_KERNEL_CONTEXT);
-		if (!ret) ret = DRM(flush_queue)(dev, context);
-	}
-	if (flags & _DRM_LOCK_FLUSH_ALL) {
-		for (i = 0; !ret && i < dev->queue_count; i++) {
-			ret = DRM(flush_queue)(dev, i);
-		}
-	}
-	return ret;
-}
-
-int DRM(flush_unblock)(drm_device_t *dev, int context, drm_lock_flags_t flags)
-{
-	int ret = 0;
-	int i;
-
-	DRM_DEBUG("\n");
-
-	if (flags & _DRM_LOCK_FLUSH) {
-		ret = DRM(flush_unblock_queue)(dev, DRM_KERNEL_CONTEXT);
-		if (!ret) ret = DRM(flush_unblock_queue)(dev, context);
-	}
-	if (flags & _DRM_LOCK_FLUSH_ALL) {
-		for (i = 0; !ret && i < dev->queue_count; i++) {
-			ret = DRM(flush_unblock_queue)(dev, i);
-		}
-	}
-
-	return ret;
-}
-
-int DRM(finish)(struct inode *inode, struct file *filp, unsigned int cmd,
-		unsigned long arg)
-{
-	drm_file_t	  *priv	  = filp->private_data;
-	drm_device_t	  *dev	  = priv->dev;
-	int		  ret	  = 0;
-	drm_lock_t	  lock;
-
-	DRM_DEBUG("\n");
-
-	if (copy_from_user(&lock, (drm_lock_t __user *)arg, sizeof(lock)))
-		return -EFAULT;
-	ret = DRM(flush_block_and_flush)(dev, lock.context, lock.flags);
-	DRM(flush_unblock)(dev, lock.context, lock.flags);
-	return ret;
-}

drivers/char/drm/gamma_old_dma.h

-/* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*-
- * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
- *
- * Copyright 1999, 2000 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
- * VA LINUX SYSTEMS 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>
- *    Gareth Hughes <gareth@valinux.com>
- */
-
-
-/* Gamma-specific code pulled from drm_dma.h:
- */
-
-void DRM(clear_next_buffer)(drm_device_t *dev)
-{
-	drm_device_dma_t *dma = dev->dma;
-
-	dma->next_buffer = NULL;
-	if (dma->next_queue && !DRM_BUFCOUNT(&dma->next_queue->waitlist)) {
-		wake_up_interruptible(&dma->next_queue->flush_queue);
-	}
-	dma->next_queue	 = NULL;
-}
-
-int DRM(select_queue)(drm_device_t *dev, void (*wrapper)(unsigned long))
-{
-	int	   i;
-	int	   candidate = -1;
-	int	   j	     = jiffies;
-
-	if (!dev) {
-		DRM_ERROR("No device\n");
-		return -1;
-	}
-	if (!dev->queuelist || !dev->queuelist[DRM_KERNEL_CONTEXT]) {
-				/* This only happens between the time the
-				   interrupt is initialized and the time
-				   the queues are initialized. */
-		return -1;
-	}
-
-				/* Doing "while locked" DMA? */
-	if (DRM_WAITCOUNT(dev, DRM_KERNEL_CONTEXT)) {
-		return DRM_KERNEL_CONTEXT;
-	}
-
-				/* If there are buffers on the last_context
-				   queue, and we have not been executing
-				   this context very long, continue to
-				   execute this context. */
-	if (dev->last_switch <= j
-	    && dev->last_switch + DRM_TIME_SLICE > j
-	    && DRM_WAITCOUNT(dev, dev->last_context)) {
-		return dev->last_context;
-	}
-
-				/* Otherwise, find a candidate */
-	for (i = dev->last_checked + 1; i < dev->queue_count; i++) {
-		if (DRM_WAITCOUNT(dev, i)) {
-			candidate = dev->last_checked = i;
-			break;
-		}
-	}
-
-	if (candidate < 0) {
-		for (i = 0; i < dev->queue_count; i++) {
-			if (DRM_WAITCOUNT(dev, i)) {
-				candidate = dev->last_checked = i;
-				break;
-			}
-		}
-	}
-
-	if (wrapper
-	    && candidate >= 0
-	    && candidate != dev->last_context
-	    && dev->last_switch <= j
-	    && dev->last_switch + DRM_TIME_SLICE > j) {
-		if (dev->timer.expires != dev->last_switch + DRM_TIME_SLICE) {
-			del_timer(&dev->timer);
-			dev->timer.function = wrapper;
-			dev->timer.data	    = (unsigned long)dev;
-			dev->timer.expires  = dev->last_switch+DRM_TIME_SLICE;
-			add_timer(&dev->timer);
-		}
-		return -1;
-	}
-
-	return candidate;
-}
-
-
-int DRM(dma_enqueue)(struct file *filp, drm_dma_t *d)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int		  i;
-	drm_queue_t	  *q;
-	drm_buf_t	  *buf;
-	int		  idx;
-	int		  while_locked = 0;
-	drm_device_dma_t  *dma = dev->dma;
-	int		  *ind;
-	int		  err;
-	DECLARE_WAITQUEUE(entry, current);
-
-	DRM_DEBUG("%d\n", d->send_count);
-
-	if (d->flags & _DRM_DMA_WHILE_LOCKED) {
-		int context = dev->lock.hw_lock->lock;
-
-		if (!_DRM_LOCK_IS_HELD(context)) {
-			DRM_ERROR("No lock held during \"while locked\""
-				  " request\n");
-			return -EINVAL;
-		}
-		if (d->context != _DRM_LOCKING_CONTEXT(context)
-		    && _DRM_LOCKING_CONTEXT(context) != DRM_KERNEL_CONTEXT) {
-			DRM_ERROR("Lock held by %d while %d makes"
-				  " \"while locked\" request\n",
-				  _DRM_LOCKING_CONTEXT(context),
-				  d->context);
-			return -EINVAL;
-		}
-		q = dev->queuelist[DRM_KERNEL_CONTEXT];
-		while_locked = 1;
-	} else {
-		q = dev->queuelist[d->context];
-	}
-
-
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->block_write)) {
-		add_wait_queue(&q->write_queue, &entry);
-		atomic_inc(&q->block_count);
-		for (;;) {
-			current->state = TASK_INTERRUPTIBLE;
-			if (!atomic_read(&q->block_write)) break;
-			schedule();
-			if (signal_pending(current)) {
-				atomic_dec(&q->use_count);
-				remove_wait_queue(&q->write_queue, &entry);
-				return -EINTR;
-			}
-		}
-		atomic_dec(&q->block_count);
-		current->state = TASK_RUNNING;
-		remove_wait_queue(&q->write_queue, &entry);
-	}
-
-	ind = DRM(alloc)(d->send_count * sizeof(int), DRM_MEM_DRIVER);
-	if (!ind)
-		return -ENOMEM;
-
-	if (copy_from_user(ind, d->send_indices, d->send_count * sizeof(int))) {
-		err = -EFAULT;
-                goto out;
-	}
-
-	err = -EINVAL;
-	for (i = 0; i < d->send_count; i++) {
-		idx = ind[i];
-		if (idx < 0 || idx >= dma->buf_count) {
-			DRM_ERROR("Index %d (of %d max)\n",
-				  ind[i], dma->buf_count - 1);
-			goto out;
-		}
-		buf = dma->buflist[ idx ];
-		if (buf->filp != filp) {
-			DRM_ERROR("Process %d using buffer not owned\n",
-				  current->pid);
-			goto out;
-		}
-		if (buf->list != DRM_LIST_NONE) {
-			DRM_ERROR("Process %d using buffer %d on list %d\n",
-				  current->pid, buf->idx, buf->list);
-			goto out;
-		}
-		buf->used	  = ind[i];
-		buf->while_locked = while_locked;
-		buf->context	  = d->context;
-		if (!buf->used) {
-			DRM_ERROR("Queueing 0 length buffer\n");
-		}
-		if (buf->pending) {
-			DRM_ERROR("Queueing pending buffer:"
-				  " buffer %d, offset %d\n",
-				  ind[i], i);
-			goto out;
-		}
-		if (buf->waiting) {
-			DRM_ERROR("Queueing waiting buffer:"
-				  " buffer %d, offset %d\n",
-				  ind[i], i);
-			goto out;
-		}
-		buf->waiting = 1;
-		if (atomic_read(&q->use_count) == 1
-		    || atomic_read(&q->finalization)) {
-			DRM(free_buffer)(dev, buf);
-		} else {
-			DRM(waitlist_put)(&q->waitlist, buf);
-			atomic_inc(&q->total_queued);
-		}
-	}
-	atomic_dec(&q->use_count);
-
-	return 0;
-
-out:
-	DRM(free)(ind, d->send_count * sizeof(int), DRM_MEM_DRIVER);
-	atomic_dec(&q->use_count);
-	return err;
-}
-
-static int DRM(dma_get_buffers_of_order)(struct file *filp, drm_dma_t *d,
-					 int order)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int		  i;
-	drm_buf_t	  *buf;
-	drm_device_dma_t  *dma = dev->dma;
-
-	for (i = d->granted_count; i < d->request_count; i++) {
-		buf = DRM(freelist_get)(&dma->bufs[order].freelist,
-					d->flags & _DRM_DMA_WAIT);
-		if (!buf) break;
-		if (buf->pending || buf->waiting) {
-			DRM_ERROR("Free buffer %d in use: filp %p (w%d, p%d)\n",
-				  buf->idx,
-				  buf->filp,
-				  buf->waiting,
-				  buf->pending);
-		}
-		buf->filp     = filp;
-		if (copy_to_user(&d->request_indices[i],
-				 &buf->idx,
-				 sizeof(buf->idx)))
-			return -EFAULT;
-
-		if (copy_to_user(&d->request_sizes[i],
-				 &buf->total,
-				 sizeof(buf->total)))
-			return -EFAULT;
-
-		++d->granted_count;
-	}
-	return 0;
-}
-
-
-int DRM(dma_get_buffers)(struct file *filp, drm_dma_t *dma)
-{
-	int		  order;
-	int		  retcode = 0;
-	int		  tmp_order;
-
-	order = DRM(order)(dma->request_size);
-
-	dma->granted_count = 0;
-	retcode		   = DRM(dma_get_buffers_of_order)(filp, dma, order);
-
-	if (dma->granted_count < dma->request_count
-	    && (dma->flags & _DRM_DMA_SMALLER_OK)) {
-		for (tmp_order = order - 1;
-		     !retcode
-			     && dma->granted_count < dma->request_count
-			     && tmp_order >= DRM_MIN_ORDER;
-		     --tmp_order) {
-
-			retcode = DRM(dma_get_buffers_of_order)(filp, dma,
-								tmp_order);
-		}
-	}
-
-	if (dma->granted_count < dma->request_count
-	    && (dma->flags & _DRM_DMA_LARGER_OK)) {
-		for (tmp_order = order + 1;
-		     !retcode
-			     && dma->granted_count < dma->request_count
-			     && tmp_order <= DRM_MAX_ORDER;
-		     ++tmp_order) {
-
-			retcode = DRM(dma_get_buffers_of_order)(filp, dma,
-								tmp_order);
-		}
-	}
-	return 0;
-}
-