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mesa-drm/linux/driver_tmp.h
Gareth Hughes 6c092aadf6 Barebones DRM module for the Rage Pro. Enough to allow the DRI to be 
initialized, but no DMA yet.
Quote from the server output: ... (0): [drm] installed DRM signal handler
    (0): [DRI] installation complete (II) ATI(0): Direct rendering enabled
    ...
2000-12-02 13:10:03 +00:00

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/* driver_tmp.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
* 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>
*
*/
/*
* 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 TAG(x) mga_##x
*/
#ifndef HAVE_AGP
#define HAVE_AGP 0
#endif
#ifndef MUST_HAVE_AGP
#define MUST_HAVE_AGP 0
#endif
#ifndef HAVE_MTRR
#define HAVE_MTRR 0
#endif
#ifndef HAVE_CTX_BITMAP
#define HAVE_CTX_BITMAP 0
#endif
#ifndef HAVE_DMA
#define HAVE_DMA 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_DRIVER_RELEASE
#define HAVE_DRIVER_RELEASE 0
#endif
#ifndef DRIVER_PREINIT
#define DRIVER_PREINIT()
#endif
#ifndef DRIVER_POSTINIT
#define DRIVER_POSTINIT()
#endif
#ifndef DRIVER_PRETAKEDOWN
#define DRIVER_PRETAKEDOWN()
#endif
static drm_device_t TAG(device);
static struct file_operations TAG(fops) = {
#if LINUX_VERSION_CODE >= 0x020400
/* This started being used during 2.4.0-test */
owner: THIS_MODULE,
#endif
open: TAG(open),
flush: drm_flush,
release: TAG(release),
ioctl: TAG(ioctl),
mmap: drm_mmap,
read: drm_read,
fasync: drm_fasync,
poll: drm_poll,
};
static struct miscdevice TAG(misc) = {
minor: MISC_DYNAMIC_MINOR,
name: DRIVER_NAME,
fops: &TAG(fops),
};
#ifdef MODULE
static char *drm_opts = NULL;
#endif
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_PARM( drm_opts, "s" );
#ifndef MODULE
/* r128_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 TAG(options)( char *str )
{
drm_parse_options( str );
return 1;
}
__setup( DRIVER_NAME "=", TAG(options) );
#endif
static int TAG(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
drm_dma_setup( dev );
#endif
atomic_set( &dev->total_open, 0 );
atomic_set( &dev->total_close, 0 );
atomic_set( &dev->total_ioctl, 0 );
atomic_set( &dev->total_irq, 0 );
atomic_set( &dev->total_ctx, 0 );
atomic_set( &dev->total_locks, 0 );
atomic_set( &dev->total_unlocks, 0 );
atomic_set( &dev->total_contends, 0 );
atomic_set( &dev->total_sleeps, 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 TAG(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" );
/* FIXME: mga_dma_cleanup() ???
*/
DRIVER_PRETAKEDOWN();
#if HAVE_DMA_IRQ
if ( dev->irq ) TAG(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 HAVE_AGP && defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
/* 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_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 HAVE_MTRR && defined(CONFIG_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;
}
#endif
#if HAVE_DMA
drm_dma_takedown( dev );
#endif
dev->queue_count = 0;
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 )
{
int retcode;
drm_device_t *dev = &TAG(device);
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();
retcode = misc_register( &TAG(misc) );
if ( retcode ) {
DRM_ERROR( "Cannot register \"%s\"\n", DRIVER_NAME );
return retcode;
}
dev->device = MKDEV( MISC_MAJOR, TAG(misc).minor );
dev->name = DRIVER_NAME;
drm_mem_init();
drm_proc_init( dev );
#if HAVE_AGP && defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
dev->agp = drm_agp_init();
#if MUST_HAVE_AGP
if ( dev->agp == NULL ) {
DRM_ERROR( "Cannot initialize the agpgart module.\n" );
drm_proc_cleanup();
misc_deregister( &TAG(misc) );
TAG(takedown)( dev );
return -ENOMEM;
}
#endif
#if HAVE_MTRR && defined(CONFIG_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_proc_cleanup();
misc_deregister( &TAG(misc) );
TAG(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,
TAG(misc).minor );
return 0;
}
/* drm_cleanup is called via cleanup_module at module unload time.
*/
static void __exit drm_cleanup( void )
{
drm_device_t *dev = &TAG(device);
DRM_DEBUG( "\n" );
drm_proc_cleanup();
if ( misc_deregister( &TAG(misc) ) ) {
DRM_ERROR( "Cannot unload module\n" );
} else {
DRM_INFO( "Module unloaded\n" );
}
#if HAVE_CTX_BITMAP
drm_ctxbitmap_cleanup( dev );
#endif
#if HAVE_MTRR && defined(CONFIG_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
TAG(takedown)( dev );
#if HAVE_AGP && defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
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 TAG(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 TAG(open)( struct inode *inode, struct file *filp )
{
drm_device_t *dev = &TAG(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->total_open );
spin_lock( &dev->count_lock );
if ( !dev->open_count++ ) {
spin_unlock( &dev->count_lock );
return TAG(setup)( dev );
}
spin_unlock( &dev->count_lock );
}
return retcode;
}
int TAG(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 );
/* ========================================================
* 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_DRIVER_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_DRIVER_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->total_locks );
break; /* Got lock */
}
/* Contention */
atomic_inc( &dev->total_sleeps );
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->total_close );
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 TAG(takedown)( dev );
}
spin_unlock( &dev->count_lock );
unlock_kernel();
return retcode;
}
/* r128_ioctl is called whenever a process performs an ioctl on /dev/drm. */
int TAG(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->total_ioctl );
++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 = &TAG(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 TAG(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 ) {
/* FIXME: do gamma stuff???
*/
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->total_locks );
#if HAVE_MULTIPLE_DMA_QUEUES
atomic_inc( &q->total_locks );
#endif
break; /* Got lock */
}
/* Contention */
atomic_inc( &dev->total_sleeps );
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 TAG(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->total_unlocks );
if ( _DRM_LOCK_IS_CONT( dev->lock.hw_lock->lock ) )
atomic_inc( &dev->total_contends );
drm_lock_transfer( dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT );
#if HAVE_DMA_SCHEDULE
TAG(dma_schedule)( dev, 1 );
#endif
/* FIXME: mga has no context_flag check...
*/
if ( !dev->context_flag ) {
if ( drm_lock_free( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT ) ) {
DRM_ERROR( "\n" );
}
}
unblock_all_signals();
return 0;
}
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