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-rw-r--r--linux/drm_context.h578
1 files changed, 0 insertions, 578 deletions
diff --git a/linux/drm_context.h b/linux/drm_context.h
deleted file mode 100644
index b99c9947..00000000
--- a/linux/drm_context.h
+++ /dev/null
@@ -1,578 +0,0 @@
-/**
- * \file drm_context.h
- * IOCTLs for generic contexts
- *
- * \author Rickard E. (Rik) Faith <faith@valinux.com>
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * 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.
- */
-
-/*
- * ChangeLog:
- * 2001-11-16 Torsten Duwe <duwe@caldera.de>
- * added context constructor/destructor hooks,
- * needed by SiS driver's memory management.
- */
-
-#include "drmP.h"
-
-/******************************************************************/
-/** \name Context bitmap support */
-/*@{*/
-
-/**
- * Free a handle from the context bitmap.
- *
- * \param dev DRM device.
- * \param ctx_handle context handle.
- *
- * Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry
- * in drm_device::context_sareas, while holding the drm_device::struct_sem
- * lock.
- */
-void DRM(ctxbitmap_free)( drm_device_t *dev, int ctx_handle )
-{
- if ( ctx_handle < 0 ) goto failed;
- if ( !dev->ctx_bitmap ) goto failed;
-
- if ( ctx_handle < DRM_MAX_CTXBITMAP ) {
- down(&dev->struct_sem);
- clear_bit( ctx_handle, dev->ctx_bitmap );
- dev->context_sareas[ctx_handle] = NULL;
- up(&dev->struct_sem);
- return;
- }
-failed:
- DRM_ERROR( "Attempt to free invalid context handle: %d\n",
- ctx_handle );
- return;
-}
-
-/**
- * Context bitmap allocation.
- *
- * \param dev DRM device.
- * \return (non-negative) context handle on success or a negative number on failure.
- *
- * Find the first zero bit in drm_device::ctx_bitmap and (re)allocates
- * drm_device::context_sareas to accommodate the new entry while holding the
- * drm_device::struct_sem lock.
- */
-int DRM(ctxbitmap_next)( drm_device_t *dev )
-{
- int bit;
-
- if(!dev->ctx_bitmap) return -1;
-
- down(&dev->struct_sem);
- bit = find_first_zero_bit( dev->ctx_bitmap, DRM_MAX_CTXBITMAP );
- if ( bit < DRM_MAX_CTXBITMAP ) {
- set_bit( bit, dev->ctx_bitmap );
- DRM_DEBUG( "drm_ctxbitmap_next bit : %d\n", bit );
- if((bit+1) > dev->max_context) {
- dev->max_context = (bit+1);
- if(dev->context_sareas) {
- drm_map_t **ctx_sareas;
-
- ctx_sareas = DRM(realloc)(dev->context_sareas,
- (dev->max_context - 1) *
- sizeof(*dev->context_sareas),
- dev->max_context *
- sizeof(*dev->context_sareas),
- DRM_MEM_MAPS);
- if(!ctx_sareas) {
- clear_bit(bit, dev->ctx_bitmap);
- up(&dev->struct_sem);
- return -1;
- }
- dev->context_sareas = ctx_sareas;
- dev->context_sareas[bit] = NULL;
- } else {
- /* max_context == 1 at this point */
- dev->context_sareas = DRM(alloc)(
- dev->max_context *
- sizeof(*dev->context_sareas),
- DRM_MEM_MAPS);
- if(!dev->context_sareas) {
- clear_bit(bit, dev->ctx_bitmap);
- up(&dev->struct_sem);
- return -1;
- }
- dev->context_sareas[bit] = NULL;
- }
- }
- up(&dev->struct_sem);
- return bit;
- }
- up(&dev->struct_sem);
- return -1;
-}
-
-/**
- * Context bitmap initialization.
- *
- * \param dev DRM device.
- *
- * Allocates and initialize drm_device::ctx_bitmap and drm_device::context_sareas, while holding
- * the drm_device::struct_sem lock.
- */
-int DRM(ctxbitmap_init)( drm_device_t *dev )
-{
- int i;
- int temp;
-
- down(&dev->struct_sem);
- dev->ctx_bitmap = (unsigned long *) DRM(alloc)( PAGE_SIZE,
- DRM_MEM_CTXBITMAP );
- if ( dev->ctx_bitmap == NULL ) {
- up(&dev->struct_sem);
- return -ENOMEM;
- }
- memset( (void *)dev->ctx_bitmap, 0, PAGE_SIZE );
- dev->context_sareas = NULL;
- dev->max_context = -1;
- up(&dev->struct_sem);
-
- for ( i = 0 ; i < DRM_RESERVED_CONTEXTS ; i++ ) {
- temp = DRM(ctxbitmap_next)( dev );
- DRM_DEBUG( "drm_ctxbitmap_init : %d\n", temp );
- }
-
- return 0;
-}
-
-/**
- * Context bitmap cleanup.
- *
- * \param dev DRM device.
- *
- * Frees drm_device::ctx_bitmap and drm_device::context_sareas, while holding
- * the drm_device::struct_sem lock.
- */
-void DRM(ctxbitmap_cleanup)( drm_device_t *dev )
-{
- down(&dev->struct_sem);
- if( dev->context_sareas ) DRM(free)( dev->context_sareas,
- sizeof(*dev->context_sareas) *
- dev->max_context,
- DRM_MEM_MAPS );
- DRM(free)( (void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP );
- up(&dev->struct_sem);
-}
-
-/*@}*/
-
-/******************************************************************/
-/** \name Per Context SAREA Support */
-/*@{*/
-
-/**
- * Get per-context SAREA.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument pointing to a drm_ctx_priv_map structure.
- * \return zero on success or a negative number on failure.
- *
- * Gets the map from drm_device::context_sareas with the handle specified and
- * returns its handle.
- */
-int DRM(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 (dev->max_context < 0 || request.ctx_id >= (unsigned) 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;
-}
-
-/**
- * Set per-context SAREA.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument pointing to a drm_ctx_priv_map structure.
- * \return zero on success or a negative number on failure.
- *
- * Searches the mapping specified in \p arg and update the entry in
- * drm_device::context_sareas with it.
- */
-int DRM(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 = NULL;
- struct list_head *list;
-
- if (copy_from_user(&request,
- (drm_ctx_priv_map_t __user *)arg,
- sizeof(request)))
- return -EFAULT;
-
- down(&dev->struct_sem);
- 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)
- goto found;
- }
-bad:
- up(&dev->struct_sem);
- return -EINVAL;
-
-found:
- map = r_list->map;
- if (!map) goto bad;
- if (dev->max_context < 0)
- goto bad;
- if (request.ctx_id >= (unsigned) dev->max_context)
- goto bad;
- dev->context_sareas[request.ctx_id] = map;
- up(&dev->struct_sem);
- return 0;
-}
-
-/*@}*/
-
-/******************************************************************/
-/** \name The actual DRM context handling routines */
-/*@{*/
-
-/**
- * Switch context.
- *
- * \param dev DRM device.
- * \param old old context handle.
- * \param new new context handle.
- * \return zero on success or a negative number on failure.
- *
- * Attempt to set drm_device::context_flag.
- */
-int DRM(context_switch)( drm_device_t *dev, int old, int new )
-{
- 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->last_context ) {
- clear_bit( 0, &dev->context_flag );
- return 0;
- }
-
- return 0;
-}
-
-/**
- * Complete context switch.
- *
- * \param dev DRM device.
- * \param new new context handle.
- * \return zero on success or a negative number on failure.
- *
- * Updates drm_device::last_context and drm_device::last_switch. Verifies the
- * hardware lock is held, clears the drm_device::context_flag and wakes up
- * drm_device::context_wait.
- */
-int DRM(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. */
- clear_bit( 0, &dev->context_flag );
- wake_up( &dev->context_wait );
-
- return 0;
-}
-
-/**
- * Reserve contexts.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument pointing to a drm_ctx_res structure.
- * \return zero on success or a negative number on failure.
- */
-int DRM(resctx)( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
-{
- drm_ctx_res_t res;
- drm_ctx_t __user *argp = (void __user *)arg;
- drm_ctx_t ctx;
- int i;
-
- 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;
-}
-
-/**
- * Add context.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument pointing to a drm_ctx structure.
- * \return zero on success or a negative number on failure.
- *
- * Get a new handle for the context and copy to userspace.
- */
-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_list_t * ctx_entry;
- drm_ctx_t __user *argp = (void __user *)arg;
- drm_ctx_t ctx;
-
- if ( copy_from_user( &ctx, argp, sizeof(ctx) ) )
- return -EFAULT;
-
- ctx.handle = DRM(ctxbitmap_next)( dev );
- if ( ctx.handle == DRM_KERNEL_CONTEXT ) {
- /* Skip kernel's context and get a new one. */
- ctx.handle = DRM(ctxbitmap_next)( dev );
- }
- DRM_DEBUG( "%d\n", ctx.handle );
- if ( ctx.handle == -1 ) {
- DRM_DEBUG( "Not enough free contexts.\n" );
- /* Should this return -EBUSY instead? */
- return -ENOMEM;
- }
-
- if ( ctx.handle != DRM_KERNEL_CONTEXT )
- {
- if (dev->fn_tbl.context_ctor)
- dev->fn_tbl.context_ctor(dev, ctx.handle);
- }
-
- ctx_entry = DRM(alloc)( sizeof(*ctx_entry), DRM_MEM_CTXLIST );
- if ( !ctx_entry ) {
- DRM_DEBUG("out of memory\n");
- return -ENOMEM;
- }
-
- INIT_LIST_HEAD( &ctx_entry->head );
- ctx_entry->handle = ctx.handle;
- ctx_entry->tag = priv;
-
- down( &dev->ctxlist_sem );
- list_add( &ctx_entry->head, &dev->ctxlist->head );
- ++dev->ctx_count;
- up( &dev->ctxlist_sem );
-
- 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 )
-{
- /* This does nothing */
- return 0;
-}
-
-/**
- * Get context.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument pointing to a drm_ctx structure.
- * \return zero on success or a negative number on failure.
- */
-int DRM(getctx)( struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg )
-{
- drm_ctx_t __user *argp = (void __user *)arg;
- drm_ctx_t ctx;
-
- if ( copy_from_user( &ctx, argp, sizeof(ctx) ) )
- return -EFAULT;
-
- /* This is 0, because we don't handle any context flags */
- ctx.flags = 0;
-
- if ( copy_to_user( argp, &ctx, sizeof(ctx) ) )
- return -EFAULT;
- return 0;
-}
-
-/**
- * Switch context.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument pointing to a drm_ctx structure.
- * \return zero on success or a negative number on failure.
- *
- * Calls context_switch().
- */
-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 );
-}
-
-/**
- * New context.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument pointing to a drm_ctx structure.
- * \return zero on success or a negative number on failure.
- *
- * Calls context_switch_complete().
- */
-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;
-}
-
-/**
- * Remove context.
- *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument pointing to a drm_ctx structure.
- * \return zero on success or a negative number on failure.
- *
- * If not the special kernel context, calls ctxbitmap_free() to free the specified context.
- */
-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;
-
- if ( copy_from_user( &ctx, (drm_ctx_t __user *)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 ) {
- if (dev->fn_tbl.context_dtor)
- dev->fn_tbl.context_dtor(dev, ctx.handle);
- DRM(ctxbitmap_free)( dev, ctx.handle );
- }
-
- down( &dev->ctxlist_sem );
- if ( !list_empty( &dev->ctxlist->head ) ) {
- drm_ctx_list_t *pos, *n;
-
- list_for_each_entry_safe( pos, n, &dev->ctxlist->head, head ) {
- if ( pos->handle == ctx.handle ) {
- list_del( &pos->head );
- DRM(free)( pos, sizeof(*pos), DRM_MEM_CTXLIST );
- --dev->ctx_count;
- }
- }
- }
- up( &dev->ctxlist_sem );
-
- return 0;
-}
-
-/*@}*/
-
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