diff options
Diffstat (limited to 'linux/drm_drv.h')
| -rw-r--r-- | linux/drm_drv.h | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/linux/drm_drv.h b/linux/drm_drv.h new file mode 100644 index 00000000..7447ca6d --- /dev/null +++ b/linux/drm_drv.h @@ -0,0 +1,938 @@ +/* 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_RM_MAP)] = { DRM(rmmap), 1, 0 }, + + [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { DRM(setsareactx), 1, 1 }, + [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { DRM(getsareactx), 1, 0 }, + + [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 = DRM(alloc)(sizeof(*dev->maplist), + DRM_MEM_MAPS); + if(dev->maplist == NULL) return -ENOMEM; + memset(dev->maplist, 0, sizeof(*dev->maplist)); + INIT_LIST_HEAD(&dev->maplist->head); + 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_map_list_t *r_list; + struct list_head *list; + 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; + } + + if( dev->maplist ) { + list_for_each(list, &dev->maplist->head) { + r_list = (drm_map_list_t *)list; + map = r_list->map; + DRM(free)(r_list, sizeof(*r_list), DRM_MEM_MAPS); + if(!map) continue; + + 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: + vfree(map->handle); + 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, sizeof(*dev->maplist), DRM_MEM_MAPS); + dev->maplist = NULL; + } + +#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 + if (dev->agp) + 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_DEBUG( "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 ); + } + } +#elif __HAVE_DMA + 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 __HAVE_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 __HAVE_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; +} |