patch-2.4.8 linux/drivers/char/drm/mga_context.c

• Lines: 210
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.7/linux/drivers/char/drm/mga_context.c
• Orig date: Sun Oct 1 20:00:00 2000

diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/mga_context.c linux/drivers/char/drm/mga_context.c
@@ -1,209 +0,0 @@
-/* mga_context.c -- IOCTLs for mga contexts -*- linux-c -*-
- * Created: Mon Dec 13 09:51:35 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.
- * 
- * Author: Rickard E. (Rik) Faith <faith@valinux.com>
- *	   Jeff Hartmann <jhartmann@valinux.com>
- *
- */
-
-#define __NO_VERSION__
-#include "drmP.h"
-#include "mga_drv.h"
-
-static int mga_alloc_queue(drm_device_t *dev)
-{
-   	return drm_ctxbitmap_next(dev);
-}
-
-int mga_context_switch(drm_device_t *dev, int old, int new)
-{
-        char        buf[64];
-
-        atomic_inc(&dev->total_ctx);
-
-        if (test_and_set_bit(0, &dev->context_flag)) {
-                DRM_ERROR("Reentering -- FIXME\n");
-                return -EBUSY;
-        }
-
-#if DRM_DMA_HISTOGRAM
-        dev->ctx_start = get_cycles();
-#endif
-        
-        DRM_DEBUG("Context switch from %d to %d\n", old, new);
-
-        if (new == dev->last_context) {
-                clear_bit(0, &dev->context_flag);
-                return 0;
-        }
-        
-        if (drm_flags & DRM_FLAG_NOCTX) {
-                mga_context_switch_complete(dev, new);
-        } else {
-                sprintf(buf, "C %d %d\n", old, new);
-                drm_write_string(dev, buf);
-        }
-        
-        return 0;
-}
-
-int mga_context_switch_complete(drm_device_t *dev, int new)
-{
-        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 a context switch is ever initiated
-                                   when the kernel holds the lock, release
-                                   that lock here. */
-#if DRM_DMA_HISTOGRAM
-        atomic_inc(&dev->histo.ctx[drm_histogram_slot(get_cycles()
-                                                      - dev->ctx_start)]);
-                   
-#endif
-        clear_bit(0, &dev->context_flag);
-        wake_up(&dev->context_wait);
-        
-        return 0;
-}
-
-int mga_resctx(struct inode *inode, struct file *filp, unsigned int cmd,
-	       unsigned long arg)
-{
-	drm_ctx_res_t	res;
-	drm_ctx_t	ctx;
-	int		i;
-
-	if (copy_from_user(&res, (drm_ctx_res_t *)arg, 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((drm_ctx_res_t *)arg, &res, sizeof(res)))
-		return -EFAULT;
-	return 0;
-}
-
-int mga_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;
-
-	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
-		return -EFAULT;
-	if ((ctx.handle = mga_alloc_queue(dev)) == DRM_KERNEL_CONTEXT) {
-				/* Skip kernel's context and get a new one. */
-		ctx.handle = mga_alloc_queue(dev);
-	}
-        if (ctx.handle == -1) {
-		return -ENOMEM;
-	}
-	DRM_DEBUG("%d\n", ctx.handle);
-	if (copy_to_user((drm_ctx_t *)arg, &ctx, sizeof(ctx)))
-		return -EFAULT;
-	return 0;
-}
-
-int mga_modctx(struct inode *inode, struct file *filp, unsigned int cmd,
-	unsigned long arg)
-{
-   	/* This does nothing for the mga */
-	return 0;
-}
-
-int mga_getctx(struct inode *inode, struct file *filp, unsigned int cmd,
-	unsigned long arg)
-{
-	drm_ctx_t ctx;
-
-	if (copy_from_user(&ctx, (drm_ctx_t*)arg, sizeof(ctx)))
-		return -EFAULT;
-	/* This is 0, because we don't hanlde any context flags */
-	ctx.flags = 0;
-	if (copy_to_user((drm_ctx_t*)arg, &ctx, sizeof(ctx)))
-		return -EFAULT;
-	return 0;
-}
-
-int mga_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 *)arg, sizeof(ctx)))
-		return -EFAULT;
-	DRM_DEBUG("%d\n", ctx.handle);
-	return mga_context_switch(dev, dev->last_context, ctx.handle);
-}
-
-int mga_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 *)arg, sizeof(ctx)))
-		return -EFAULT;
-	DRM_DEBUG("%d\n", ctx.handle);
-	mga_context_switch_complete(dev, ctx.handle);
-
-	return 0;
-}
-
-int mga_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;
-
-	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
-		return -EFAULT;
-	DRM_DEBUG("%d\n", ctx.handle);
-	if(ctx.handle == DRM_KERNEL_CONTEXT+1) priv->remove_auth_on_close = 1;
-
-      	if(ctx.handle != DRM_KERNEL_CONTEXT) {
-	   	drm_ctxbitmap_free(dev, ctx.handle);
-	}
-	
-	return 0;
-}