drm_drv.c

h内核

/**
 * \file drm_drv.h 
 * Generic driver template
 *
 * \author Rickard E. (Rik) Faith <[e-mail]>
 * \author Gareth Hughes <[e-mail]>
 *
 * To use this template, you must at least define the following (samples
 * given for the MGA driver):
 *
 * \code
 * #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
 * \endcode
 */

/*
 * Created: Thu Nov 23 03:10:50 2000 by [e-mail]
 *
 * 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.
 */

#include "drmP.h"
#include "drm_core.h"

/** Ioctl table */
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_by_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_VERSION)]   = { drm_setversion,  0, 1 },

	[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)]    = { drm_setunique,   1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)]         = { drm_noop,        1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]       = { drm_noop,        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_noop,      1, 0 },

	[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. */

	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]       = { drm_control,     1, 1 },

#if __OS_HAS_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

	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)]      = { drm_sg_alloc,    1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)]       = { drm_sg_free,     1, 1 },

	[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)]   = { drm_wait_vblank, 0, 0 },
};

#define DRIVER_IOCTL_COUNT	DRM_ARRAY_SIZE( drm_ioctls )

/**
 * Take down the DRM device.
 *
 * \param dev DRM device structure.
 *
 * Frees every resource in \p dev.
 *
 * \sa drm_device and setup().
 */
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, *list_next;
	drm_vma_entry_t *vma, *vma_next;
	int i;

	DRM_DEBUG( "\n" );

	if (dev->driver->pretakedown)
	  dev->driver->pretakedown(dev);

	if ( dev->irq_enabled ) drm_irq_uninstall( dev );

	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;
	}

				/* Clear AGP information */
	if (drm_core_has_AGP(dev) && 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;
	}

				/* 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 (drm_core_has_MTRR(dev)) {
						if ( map->mtrr >= 0 ) {
							int retcode;
							retcode = mtrr_del( map->mtrr,
									    map->offset,
									    map->size );
							DRM_DEBUG( "mtrr_del=%d\n", retcode );
						}
					}
					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 */
					if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
						drm_sg_cleanup(dev->sg);
						dev->sg = NULL;
					}
					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 (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist ) {
		for ( i = 0 ; i < dev->queue_count ; i++ ) {
			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;

	if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
		drm_dma_takedown( dev );

	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 );