drm_drv.h

来自「优龙2410linux2.6.8内核源代码」· C头文件 代码 · 共 1,210 行 · 第 1/3 页

	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_safe( list, list_next, &dev->maplist->head ) {
			r_list = (drm_map_list_t *)list;

			if ( ( map = r_list->map ) ) {
				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, dev );
					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;
				case _DRM_SCATTER_GATHER:
					/* Handle it, but do nothing, if HAVE_SG
					 * isn't defined.
					 */
#if __HAVE_SG
					if(dev->sg) {
						DRM(sg_cleanup)(dev->sg);
						dev->sg = NULL;
					}
#endif
					break;
				}
				DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
			}
			list_del( list );
			DRM(free)(r_list, sizeof(*r_list), 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++ ) {
#if __HAVE_DMA_WAITLIST
			DRM(waitlist_destroy)( &dev->queuelist[i]->waitlist );
#endif
			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->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
		dev->lock.filp = NULL;
		wake_up_interruptible( &dev->lock.lock_queue );
	}
	up( &dev->struct_sem );

	return 0;
}

#include "drm_pciids.h"

static struct pci_device_id DRM(pciidlist)[] = {
	DRM(PCI_IDS)
};

static int DRM(probe)(struct pci_dev *pdev)
{
	drm_device_t *dev;
#if __HAVE_CTX_BITMAP
	int retcode;
#endif
	int i;
	int is_compat = 0;

	DRM_DEBUG( "\n" );

	for (i = 0; DRM(pciidlist)[i].vendor != 0; i++) {
		if ((DRM(pciidlist)[i].vendor == pdev->vendor) &&
		    (DRM(pciidlist)[i].device == pdev->device)) {
			is_compat = 1;
		}
	}
	if (is_compat == 0)
		return -ENODEV;

	if (DRM(numdevs) >= MAX_DEVICES)
		return -ENODEV;

	dev = &(DRM(device)[DRM(numdevs)]);

	memset( (void *)dev, 0, sizeof(*dev) );
	dev->count_lock = SPIN_LOCK_UNLOCKED;
	init_timer( &dev->timer );
	sema_init( &dev->struct_sem, 1 );
	sema_init( &dev->ctxlist_sem, 1 );

	if ((dev->minor = DRM(stub_register)(DRIVER_NAME, &DRM(fops),dev)) < 0)
		return -EPERM;
	dev->device = MKDEV(DRM_MAJOR, dev->minor );
	dev->name   = DRIVER_NAME;

	dev->pdev   = pdev;
#ifdef __alpha__
	dev->hose   = pdev->sysdata;
	dev->pci_domain = dev->hose->bus->number;
#else
	dev->pci_domain = 0;
#endif
	dev->pci_bus = pdev->bus->number;
	dev->pci_slot = PCI_SLOT(pdev->devfn);
	dev->pci_func = PCI_FUNC(pdev->devfn);
	dev->irq = pdev->irq;

	DRIVER_PREINIT();

#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)(dev->minor);
		DRM(takedown)( dev );
		return -EINVAL;
	}
#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)(dev->minor);
		DRM(takedown)( dev );
		return retcode;
 	}
#endif
	DRM(numdevs)++; /* no errors, mark it reserved */
	
	DRM_INFO( "Initialized %s %d.%d.%d %s on minor %d: %s\n",
		DRIVER_NAME,
		DRIVER_MAJOR,
		DRIVER_MINOR,
		DRIVER_PATCHLEVEL,
		DRIVER_DATE,
		dev->minor,
		pci_pretty_name(pdev));

	DRIVER_POSTINIT();

	return 0;
}

/**
 * Module initialization. Called via init_module at module load time, or via
 * linux/init/main.c (this is not currently supported).
 *
 * \return zero on success or a negative number on failure.
 *
 * Initializes an array of drm_device structures, and attempts to
 * initialize all available devices, using consecutive minors, registering the
 * stubs and initializing the AGP device.
 * 
 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
 * after the initialization for driver customization.
 */
static int __init drm_init( void )
{
	struct pci_dev *pdev = NULL;

	DRM_DEBUG( "\n" );

#ifdef MODULE
	DRM(parse_options)( drm_opts );
#endif

	DRM(mem_init)();

	while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
		DRM(probe)(pdev);
	}
	return 0;
}

/**
 * Called via cleanup_module() at module unload time.
 *
 * Cleans up all DRM device, calling takedown().
 * 
 * \sa drm_init().
 */
static void __exit drm_cleanup( void )
{
	drm_device_t *dev;
	int i;

	DRM_DEBUG( "\n" );

	for (i = DRM(numdevs) - 1; i >= 0; i--) {
		dev = &(DRM(device)[i]);
		if ( DRM(stub_unregister)(dev->minor) ) {
			DRM_ERROR( "Cannot unload module\n" );
		} else {
			DRM_DEBUG("minor %d unregistered\n", dev->minor);
			if (i == 0) {
				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 >= 0) {
			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
	}
	DRIVER_POSTCLEANUP();
	DRM(numdevs) = 0;
}

module_init( drm_init );
module_exit( drm_cleanup );


/**
 * Get version information
 *
 * \param inode device inode.
 * \param filp file pointer.
 * \param cmd command.
 * \param arg user argument, pointing to a drm_version structure.
 * \return zero on success or negative number on failure.
 *
 * Fills in the version information in \p arg.
 */
int DRM(version)( struct inode *inode, struct file *filp,
		  unsigned int cmd, unsigned long arg )
{
	drm_version_t __user *argp = (void __user *)arg;
	drm_version_t version;
	int len;

	if ( copy_from_user( &version, argp, 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( argp, &version, sizeof(version) ) )
		return -EFAULT;
	return 0;
}

/**
 * Open file.
 * 
 * \param inode device inode
 * \param filp file pointer.
 * \return zero on success or a negative number on failure.
 *
 * Searches the DRM device with the same minor number, calls open_helper(), and
 * increments the device open count. If the open count was previous at zero,
 * i.e., it's the first that the device is open, then calls setup().
 */
int DRM(open)( struct inode *inode, struct file *filp )
{
	drm_device_t *dev = NULL;
	int retcode = 0;
	int i;

	for (i = 0; i < DRM(numdevs); i++) {
		if (iminor(inode) == DRM(device)[i].minor) {
			dev = &(DRM(device)[i]);
			break;
		}
	}
	if (!dev) {
		return -ENODEV;
	}

	retcode = DRM(open_helper)( inode, filp, dev );
	if ( !retcode ) {
		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 );