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drm/linux-core/drm_drv.c

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Merge mga-1-0-0-branch into trunk.
2001-02-15 01:12:14 -07:00
/* drm_drv.h -- Generic driver template -*- linux-c -*-
* Created: Thu Nov 23 03:10:50 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>
*/
/*
* To use this template, you must at least define the following (samples
* given for the MGA driver):
*
* #define DRIVER_AUTHOR "VA Linux Systems, Inc."
*
* #define DRIVER_NAME "mga"
* #define DRIVER_DESC "Matrox G200/G400"
* #define DRIVER_DATE "20001127"
*
* #define DRIVER_MAJOR 2
* #define DRIVER_MINOR 0
* #define DRIVER_PATCHLEVEL 2
*
* #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( mga_ioctls )
*
* #define DRM(x) mga_##x
*/
#ifndef __MUST_HAVE_AGP
#define __MUST_HAVE_AGP 0
#endif
#ifndef __HAVE_CTX_BITMAP
#define __HAVE_CTX_BITMAP 0
#endif
#ifndef __HAVE_DMA_IRQ
#define __HAVE_DMA_IRQ 0
#endif
#ifndef __HAVE_DMA_QUEUE
#define __HAVE_DMA_QUEUE 0
#endif
#ifndef __HAVE_MULTIPLE_DMA_QUEUES
#define __HAVE_MULTIPLE_DMA_QUEUES 0
#endif
#ifndef __HAVE_DMA_SCHEDULE
#define __HAVE_DMA_SCHEDULE 0
#endif
#ifndef __HAVE_DMA_FLUSH
#define __HAVE_DMA_FLUSH 0
#endif
#ifndef __HAVE_DMA_READY
#define __HAVE_DMA_READY 0
#endif
#ifndef __HAVE_DMA_QUIESCENT
#define __HAVE_DMA_QUIESCENT 0
#endif
#ifndef __HAVE_RELEASE
#define __HAVE_RELEASE 0
#endif
#ifndef __HAVE_COUNTERS
#define __HAVE_COUNTERS 0
#endif
#ifndef DRIVER_PREINIT
#define DRIVER_PREINIT()
#endif
#ifndef DRIVER_POSTINIT
#define DRIVER_POSTINIT()
#endif
#ifndef DRIVER_PRERELEASE
#define DRIVER_PRERELEASE()
#endif
#ifndef DRIVER_PRETAKEDOWN
#define DRIVER_PRETAKEDOWN()
#endif
#ifndef DRIVER_IOCTLS
#define DRIVER_IOCTLS
#endif
static drm_device_t DRM(device);
static int DRM(minor);
static struct file_operations DRM(fops) = {
#if LINUX_VERSION_CODE >= 0x020400
/* This started being used during 2.4.0-test */
owner: THIS_MODULE,
#endif
open: DRM(open),
flush: DRM(flush),
release: DRM(release),
ioctl: DRM(ioctl),
mmap: DRM(mmap),
read: DRM(read),
fasync: DRM(fasync),
poll: DRM(poll),
};
static drm_ioctl_desc_t DRM(ioctls)[] = {
[DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { DRM(version), 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { DRM(getunique), 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { DRM(getmagic), 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { DRM(irq_busid), 0, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = { DRM(getmap), 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = { DRM(getclient), 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = { DRM(getstats), 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { DRM(setunique), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { DRM(block), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { DRM(unblock), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { DRM(authmagic), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { DRM(addmap), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { DRM(addctx), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { DRM(rmctx), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { DRM(modctx), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { DRM(getctx), 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { DRM(switchctx), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { DRM(newctx), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { DRM(resctx), 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { DRM(adddraw), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { DRM(rmdraw), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { DRM(lock), 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { DRM(unlock), 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { DRM(finish), 1, 0 },
#if __HAVE_DMA
[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { DRM(addbufs), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { DRM(markbufs), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { DRM(infobufs), 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { DRM(mapbufs), 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { DRM(freebufs), 1, 0 },
/* The DRM_IOCTL_DMA ioctl should be defined by the driver.
*/
#if __HAVE_DMA_IRQ
[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { DRM(control), 1, 1 },
#endif
#endif
#if __REALLY_HAVE_AGP
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { DRM(agp_acquire), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { DRM(agp_release), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { DRM(agp_enable), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { DRM(agp_info), 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { DRM(agp_alloc), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { DRM(agp_free), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { DRM(agp_bind), 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { DRM(agp_unbind), 1, 1 },
#endif
DRIVER_IOCTLS
};
#define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( DRM(ioctls) )
#ifdef MODULE
static char *drm_opts = NULL;
#endif
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_PARM( drm_opts, "s" );
#ifndef MODULE
/* DRM(options) is called by the kernel to parse command-line options
* passed via the boot-loader (e.g., LILO). It calls the insmod option
* routine, drm_parse_drm.
*/
static int __init DRM(options)( char *str )
{
DRM(parse_options)( str );
return 1;
}
__setup( DRIVER_NAME "=", DRM(options) );
#endif
static int DRM(setup)( drm_device_t *dev )
{
int i;
atomic_set( &dev->ioctl_count, 0 );
atomic_set( &dev->vma_count, 0 );
dev->buf_use = 0;
atomic_set( &dev->buf_alloc, 0 );
#if __HAVE_DMA
i = DRM(dma_setup)( dev );
if ( i < 0 )
return i;
#endif
dev->counters = 6 + __HAVE_COUNTERS;
dev->types[0] = _DRM_STAT_LOCK;
dev->types[1] = _DRM_STAT_OPENS;
dev->types[2] = _DRM_STAT_CLOSES;
dev->types[3] = _DRM_STAT_IOCTLS;
dev->types[4] = _DRM_STAT_LOCKS;
dev->types[5] = _DRM_STAT_UNLOCKS;
#ifdef __HAVE_COUNTER6
dev->types[6] = __HAVE_COUNTER6;
#endif
#ifdef __HAVE_COUNTER7
dev->types[7] = __HAVE_COUNTER7;
#endif
#ifdef __HAVE_COUNTER8
dev->types[8] = __HAVE_COUNTER8;
#endif
#ifdef __HAVE_COUNTER9
dev->types[9] = __HAVE_COUNTER9;
#endif
#ifdef __HAVE_COUNTER10
dev->types[10] = __HAVE_COUNTER10;
#endif
#ifdef __HAVE_COUNTER11
dev->types[11] = __HAVE_COUNTER11;
#endif
#ifdef __HAVE_COUNTER12
dev->types[12] = __HAVE_COUNTER12;
#endif
#ifdef __HAVE_COUNTER13
dev->types[13] = __HAVE_COUNTER13;
#endif
#ifdef __HAVE_COUNTER14
dev->types[14] = __HAVE_COUNTER14;
#endif
#ifdef __HAVE_COUNTER15
dev->types[14] = __HAVE_COUNTER14;
#endif
for ( i = 0 ; i < DRM_ARRAY_SIZE(dev->counts) ; i++ )
atomic_set( &dev->counts[i], 0 );
for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) {
dev->magiclist[i].head = NULL;
dev->magiclist[i].tail = NULL;
}
dev->maplist = NULL;
dev->map_count = 0;
dev->vmalist = NULL;
dev->lock.hw_lock = NULL;
init_waitqueue_head( &dev->lock.lock_queue );
dev->queue_count = 0;
dev->queue_reserved = 0;
dev->queue_slots = 0;
dev->queuelist = NULL;
dev->irq = 0;
dev->context_flag = 0;
dev->interrupt_flag = 0;
dev->dma_flag = 0;
dev->last_context = 0;
dev->last_switch = 0;
dev->last_checked = 0;
init_timer( &dev->timer );
init_waitqueue_head( &dev->context_wait );
dev->ctx_start = 0;
dev->lck_start = 0;
dev->buf_rp = dev->buf;
dev->buf_wp = dev->buf;
dev->buf_end = dev->buf + DRM_BSZ;
dev->buf_async = NULL;
init_waitqueue_head( &dev->buf_readers );
init_waitqueue_head( &dev->buf_writers );
DRM_DEBUG( "\n" );
/* The kernel's context could be created here, but is now created
* in drm_dma_enqueue. This is more resource-efficient for
* hardware that does not do DMA, but may mean that
* drm_select_queue fails between the time the interrupt is
* initialized and the time the queues are initialized.
*/
return 0;
}
static int DRM(takedown)( drm_device_t *dev )
{
drm_magic_entry_t *pt, *next;
drm_map_t *map;
drm_vma_entry_t *vma, *vma_next;
int i;
DRM_DEBUG( "\n" );
DRIVER_PRETAKEDOWN();
#if __HAVE_DMA_IRQ
if ( dev->irq ) DRM(irq_uninstall)( dev );
#endif
down( &dev->struct_sem );
del_timer( &dev->timer );
if ( dev->devname ) {
DRM(free)( dev->devname, strlen( dev->devname ) + 1,
DRM_MEM_DRIVER );
dev->devname = NULL;
}
if ( dev->unique ) {
DRM(free)( dev->unique, strlen( dev->unique ) + 1,
DRM_MEM_DRIVER );
dev->unique = NULL;
dev->unique_len = 0;
}
/* Clear pid list */
for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) {
for ( pt = dev->magiclist[i].head ; pt ; pt = next ) {
next = pt->next;
DRM(free)( pt, sizeof(*pt), DRM_MEM_MAGIC );
}
dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
}
#if __REALLY_HAVE_AGP
/* Clear AGP information */
if ( dev->agp ) {
drm_agp_mem_t *entry;
drm_agp_mem_t *nexte;
/* Remove AGP resources, but leave dev->agp
intact until drv_cleanup is called. */
for ( entry = dev->agp->memory ; entry ; entry = nexte ) {
nexte = entry->next;
if ( entry->bound ) DRM(unbind_agp)( entry->memory );
DRM(free_agp)( entry->memory, entry->pages );
DRM(free)( entry, sizeof(*entry), DRM_MEM_AGPLISTS );
}
dev->agp->memory = NULL;
if ( dev->agp->acquired ) DRM(agp_do_release)();
dev->agp->acquired = 0;
dev->agp->enabled = 0;
}
#endif
/* Clear vma list (only built for debugging) */
if ( dev->vmalist ) {
for ( vma = dev->vmalist ; vma ; vma = vma_next ) {
vma_next = vma->next;
DRM(free)( vma, sizeof(*vma), DRM_MEM_VMAS );
}
dev->vmalist = NULL;
}
/* Clear map area and mtrr information */
if ( dev->maplist ) {
for ( i = 0 ; i < dev->map_count ; i++ ) {
map = dev->maplist[i];
switch ( map->type ) {
case _DRM_REGISTERS:
case _DRM_FRAME_BUFFER:
#if __REALLY_HAVE_MTRR
if ( map->mtrr >= 0 ) {
int retcode;
retcode = mtrr_del( map->mtrr,
map->offset,
map->size );
DRM_DEBUG( "mtrr_del=%d\n", retcode );
}
#endif
DRM(ioremapfree)( map->handle, map->size );
break;
case _DRM_SHM:
DRM(free_pages)( (unsigned long)map->handle,
DRM(order)( map->size )
- PAGE_SHIFT,
DRM_MEM_SAREA );
break;
case _DRM_AGP:
/* Do nothing here, because this is all
* handled in the AGP/GART driver.
*/
break;
}
DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
}
DRM(free)( dev->maplist,
dev->map_count * sizeof(*dev->maplist),
DRM_MEM_MAPS );
dev->maplist = NULL;
dev->map_count = 0;
}
#if __HAVE_DMA_QUEUE || __HAVE_MULTIPLE_DMA_QUEUES
if ( dev->queuelist ) {
for ( i = 0 ; i < dev->queue_count ; i++ ) {
DRM(waitlist_destroy)( &dev->queuelist[i]->waitlist );
if ( dev->queuelist[i] ) {
DRM(free)( dev->queuelist[i],
sizeof(*dev->queuelist[0]),
DRM_MEM_QUEUES );
dev->queuelist[i] = NULL;
}
}
DRM(free)( dev->queuelist,
dev->queue_slots * sizeof(*dev->queuelist),
DRM_MEM_QUEUES );
dev->queuelist = NULL;
}
dev->queue_count = 0;
#endif
#if __HAVE_DMA
DRM(dma_takedown)( dev );
#endif
if ( dev->lock.hw_lock ) {
dev->lock.hw_lock = NULL; /* SHM removed */
dev->lock.pid = 0;
wake_up_interruptible( &dev->lock.lock_queue );
}
up( &dev->struct_sem );
return 0;
}
/* drm_init is called via init_module at module load time, or via
* linux/init/main.c (this is not currently supported).
*/
static int __init drm_init( void )
{
drm_device_t *dev = &DRM(device);
#if __HAVE_CTX_BITMAP
int retcode;
#endif
DRM_DEBUG( "\n" );
memset( (void *)dev, 0, sizeof(*dev) );
dev->count_lock = SPIN_LOCK_UNLOCKED;
sema_init( &dev->struct_sem, 1 );
#ifdef MODULE
DRM(parse_options)( drm_opts );
#endif
DRIVER_PREINIT();
DRM(mem_init)();
if ((DRM(minor) = DRM(stub_register)(DRIVER_NAME, &DRM(fops),dev)) < 0)
return -EPERM;
dev->device = MKDEV(DRM_MAJOR, DRM(minor) );
dev->name = DRIVER_NAME;
#if __REALLY_HAVE_AGP
dev->agp = DRM(agp_init)();
#if __MUST_HAVE_AGP
if ( dev->agp == NULL ) {
DRM_ERROR( "Cannot initialize the agpgart module.\n" );
DRM(stub_unregister)(DRM(minor));
DRM(takedown)( dev );
return -ENOMEM;
}
#endif
#if __REALLY_HAVE_MTRR
dev->agp->agp_mtrr = mtrr_add( dev->agp->agp_info.aper_base,
dev->agp->agp_info.aper_size*1024*1024,
MTRR_TYPE_WRCOMB,
1 );
#endif
#endif
#if __HAVE_CTX_BITMAP
retcode = DRM(ctxbitmap_init)( dev );
if( retcode ) {
DRM_ERROR( "Cannot allocate memory for context bitmap.\n" );
DRM(stub_unregister)(DRM(minor));
DRM(takedown)( dev );
return retcode;
}
#endif
DRIVER_POSTINIT();
DRM_INFO( "Initialized %s %d.%d.%d %s on minor %d\n",
DRIVER_NAME,
DRIVER_MAJOR,
DRIVER_MINOR,
DRIVER_PATCHLEVEL,
DRIVER_DATE,
DRM(minor) );
return 0;
}
/* drm_cleanup is called via cleanup_module at module unload time.
*/
static void __exit drm_cleanup( void )
{
drm_device_t *dev = &DRM(device);
DRM_DEBUG( "\n" );
if ( DRM(stub_unregister)(DRM(minor)) ) {
DRM_ERROR( "Cannot unload module\n" );
} else {
DRM_INFO( "Module unloaded\n" );
}
#if __HAVE_CTX_BITMAP
DRM(ctxbitmap_cleanup)( dev );
#endif
#if __REALLY_HAVE_AGP && __REALLY_HAVE_MTRR
if ( dev->agp && dev->agp->agp_mtrr ) {
int retval;
retval = mtrr_del( dev->agp->agp_mtrr,
dev->agp->agp_info.aper_base,
dev->agp->agp_info.aper_size*1024*1024 );
DRM_DEBUG( "mtrr_del=%d\n", retval );
}
#endif
DRM(takedown)( dev );
#if __REALLY_HAVE_AGP
if ( dev->agp ) {
DRM(agp_uninit)();
DRM(free)( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS );
dev->agp = NULL;
}
#endif
}
module_init( drm_init );
module_exit( drm_cleanup );
int DRM(version)( struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg )
{
drm_version_t version;
int len;
if ( copy_from_user( &version,
(drm_version_t *)arg,
sizeof(version) ) )
return -EFAULT;
#define DRM_COPY( name, value ) \
len = strlen( value ); \
if ( len > name##_len ) len = name##_len; \
name##_len = strlen( value ); \
if ( len && name ) { \
if ( copy_to_user( name, value, len ) ) \
return -EFAULT; \
}
version.version_major = DRIVER_MAJOR;
version.version_minor = DRIVER_MINOR;
version.version_patchlevel = DRIVER_PATCHLEVEL;
DRM_COPY( version.name, DRIVER_NAME );
DRM_COPY( version.date, DRIVER_DATE );
DRM_COPY( version.desc, DRIVER_DESC );
if ( copy_to_user( (drm_version_t *)arg,
&version,
sizeof(version) ) )
return -EFAULT;
return 0;
}
int DRM(open)( struct inode *inode, struct file *filp )
{
drm_device_t *dev = &DRM(device);
int retcode = 0;
DRM_DEBUG( "open_count = %d\n", dev->open_count );
retcode = DRM(open_helper)( inode, filp, dev );
if ( !retcode ) {
#if LINUX_VERSION_CODE < 0x020333
MOD_INC_USE_COUNT; /* Needed before Linux 2.3.51 */
#endif
atomic_inc( &dev->counts[_DRM_STAT_OPENS] );
spin_lock( &dev->count_lock );
if ( !dev->open_count++ ) {
spin_unlock( &dev->count_lock );
return DRM(setup)( dev );
}
spin_unlock( &dev->count_lock );
}
return retcode;
}
int DRM(release)( struct inode *inode, struct file *filp )
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev;
int retcode = 0;
lock_kernel();
dev = priv->dev;
DRM_DEBUG( "open_count = %d\n", dev->open_count );
DRIVER_PRERELEASE();
/* ========================================================
* Begin inline drm_release
*/
DRM_DEBUG( "pid = %d, device = 0x%x, open_count = %d\n",
current->pid, dev->device, dev->open_count );
if ( dev->lock.hw_lock &&
_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) &&
dev->lock.pid == current->pid ) {
DRM_ERROR( "Process %d dead, freeing lock for context %d\n",
current->pid,
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock) );
#if __HAVE_RELEASE
DRIVER_RELEASE();
#endif
DRM(lock_free)( dev, &dev->lock.hw_lock->lock,
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock) );
/* FIXME: may require heavy-handed reset of
hardware at this point, possibly
processed via a callback to the X
server. */
}
#if __HAVE_RELEASE
else if ( dev->lock.hw_lock ) {
/* The lock is required to reclaim buffers */
DECLARE_WAITQUEUE( entry, current );
add_wait_queue( &dev->lock.lock_queue, &entry );
for (;;) {
current->state = TASK_INTERRUPTIBLE;
if ( !dev->lock.hw_lock ) {
/* Device has been unregistered */
retcode = -EINTR;
break;
}
if ( DRM(lock_take)( &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT ) ) {
dev->lock.pid = priv->pid;
dev->lock.lock_time = jiffies;
atomic_inc( &dev->counts[_DRM_STAT_LOCKS] );
break; /* Got lock */
}
/* Contention */
#if 0
atomic_inc( &dev->total_sleeps );
#endif
schedule();
if ( signal_pending( current ) ) {
retcode = -ERESTARTSYS;
break;
}
}
current->state = TASK_RUNNING;
remove_wait_queue( &dev->lock.lock_queue, &entry );
if( !retcode ) {
DRIVER_RELEASE();
DRM(lock_free)( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT );
}
}
#else
DRM(reclaim_buffers)( dev, priv->pid );
#endif
DRM(fasync)( -1, filp, 0 );
down( &dev->struct_sem );
if ( priv->remove_auth_on_close == 1 ) {
drm_file_t *temp = dev->file_first;
while ( temp ) {
temp->authenticated = 0;
temp = temp->next;
}
}
if ( priv->prev ) {
priv->prev->next = priv->next;
} else {
dev->file_first = priv->next;
}
if ( priv->next ) {
priv->next->prev = priv->prev;
} else {
dev->file_last = priv->prev;
}
up( &dev->struct_sem );
DRM(free)( priv, sizeof(*priv), DRM_MEM_FILES );
/* ========================================================
* End inline drm_release
*/
#if LINUX_VERSION_CODE < 0x020333
MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
#endif
atomic_inc( &dev->counts[_DRM_STAT_CLOSES] );
spin_lock( &dev->count_lock );
if ( !--dev->open_count ) {
if ( atomic_read( &dev->ioctl_count ) || dev->blocked ) {
DRM_ERROR( "Device busy: %d %d\n",
atomic_read( &dev->ioctl_count ),
dev->blocked );
spin_unlock( &dev->count_lock );
unlock_kernel();
return -EBUSY;
}
spin_unlock( &dev->count_lock );
unlock_kernel();
return DRM(takedown)( dev );
}
spin_unlock( &dev->count_lock );
unlock_kernel();
return retcode;
}
/* DRM(ioctl) is called whenever a process performs an ioctl on /dev/drm.
*/
int DRM(ioctl)( 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_ioctl_desc_t *ioctl;
drm_ioctl_t *func;
int nr = DRM_IOCTL_NR(cmd);
int retcode = 0;
atomic_inc( &dev->ioctl_count );
atomic_inc( &dev->counts[_DRM_STAT_IOCTLS] );
++priv->ioctl_count;
DRM_DEBUG( "pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%x, auth=%d\n",
current->pid, cmd, nr, dev->device, priv->authenticated );
if ( nr >= DRIVER_IOCTL_COUNT ) {
retcode = -EINVAL;
} else {
ioctl = &DRM(ioctls)[nr];
func = ioctl->func;
if ( !func ) {
DRM_DEBUG( "no function\n" );
retcode = -EINVAL;
} else if ( ( ioctl->root_only && !capable( CAP_SYS_ADMIN ) )||
( ioctl->auth_needed && !priv->authenticated ) ) {
retcode = -EACCES;
} else {
retcode = func( inode, filp, cmd, arg );
}
}
atomic_dec( &dev->ioctl_count );
return retcode;
}
int DRM(lock)( 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;
DECLARE_WAITQUEUE( entry, current );
drm_lock_t lock;
int ret = 0;
#if __HAVE_MULTIPLE_DMA_QUEUES
drm_queue_t *q;
#endif
#if DRM_DMA_HISTOGRAM
cycles_t start;
dev->lck_start = start = get_cycles();
#endif
if ( copy_from_user( &lock, (drm_lock_t *)arg, sizeof(lock) ) )
return -EFAULT;
if ( lock.context == DRM_KERNEL_CONTEXT ) {
DRM_ERROR( "Process %d using kernel context %d\n",
current->pid, lock.context );
return -EINVAL;
}
DRM_DEBUG( "%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
lock.context, current->pid,
dev->lock.hw_lock->lock, lock.flags );
#if __HAVE_DMA_QUEUE
if ( lock.context < 0 )
return -EINVAL;
#elif __HAVE_MULTIPLE_DMA_QUEUES
if ( lock.context < 0 || lock.context >= dev->queue_count )
return -EINVAL;
q = dev->queuelist[lock.context];
#endif
#if __HAVE_DMA_FLUSH
ret = DRM(flush_block_and_flush)( dev, lock.context, lock.flags );
#endif
if ( !ret ) {
add_wait_queue( &dev->lock.lock_queue, &entry );
for (;;) {
current->state = TASK_INTERRUPTIBLE;
if ( !dev->lock.hw_lock ) {
/* Device has been unregistered */
ret = -EINTR;
break;
}
if ( DRM(lock_take)( &dev->lock.hw_lock->lock,
lock.context ) ) {
dev->lock.pid = current->pid;
dev->lock.lock_time = jiffies;
atomic_inc( &dev->counts[_DRM_STAT_LOCKS] );
break; /* Got lock */
}
/* Contention */
schedule();
if ( signal_pending( current ) ) {
ret = -ERESTARTSYS;
break;
}
}
current->state = TASK_RUNNING;
remove_wait_queue( &dev->lock.lock_queue, &entry );
}
#if __HAVE_DMA_FLUSH
DRM(flush_unblock)( dev, lock.context, lock.flags ); /* cleanup phase */
#endif
if ( !ret ) {
sigemptyset( &dev->sigmask );
sigaddset( &dev->sigmask, SIGSTOP );
sigaddset( &dev->sigmask, SIGTSTP );
sigaddset( &dev->sigmask, SIGTTIN );
sigaddset( &dev->sigmask, SIGTTOU );
dev->sigdata.context = lock.context;
dev->sigdata.lock = dev->lock.hw_lock;
block_all_signals( DRM(notifier),
&dev->sigdata, &dev->sigmask );
#if __HAVE_DMA_READY
if ( lock.flags & _DRM_LOCK_READY ) {
DRIVER_DMA_READY();
}
#endif
#if __HAVE_DMA_QUIESCENT
if ( lock.flags & _DRM_LOCK_QUIESCENT ) {
DRIVER_DMA_QUIESCENT();
}
#endif
}
DRM_DEBUG( "%d %s\n", lock.context, ret ? "interrupted" : "has lock" );
#if DRM_DMA_HISTOGRAM
atomic_inc(&dev->histo.lacq[DRM(histogram_slot)(get_cycles()-start)]);
#endif
return ret;
}
int DRM(unlock)( 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_lock_t lock;
if ( copy_from_user( &lock, (drm_lock_t *)arg, sizeof(lock) ) )
return -EFAULT;
if ( lock.context == DRM_KERNEL_CONTEXT ) {
DRM_ERROR( "Process %d using kernel context %d\n",
current->pid, lock.context );
return -EINVAL;
}
atomic_inc( &dev->counts[_DRM_STAT_UNLOCKS] );
DRM(lock_transfer)( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT );
#if __HAVE_DMA_SCHEDULE
DRM(dma_schedule)( dev, 1 );
#endif
/* FIXME: Do we ever really need to check this???
*/
if ( 1 /* !dev->context_flag */ ) {
if ( DRM(lock_free)( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT ) ) {
DRM_ERROR( "\n" );
}
}
unblock_all_signals();
return 0;
}