drm_drv.h

移植到2410开发板上的源代码

/* drm_drv.h -- Generic driver template -*- linux-c -*-
 * 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.
 *
 * Authors:
 *    Rickard E. (Rik) Faith <[e-mail]>
 *    Gareth Hughes <[e-mail]>
 */

/*
 * 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 __HAVE_SG
#define __HAVE_SG			0
#endif
#ifndef __HAVE_KERNEL_CTX_SWITCH
#define __HAVE_KERNEL_CTX_SWITCH	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_POSTCLEANUP
#define DRIVER_POSTCLEANUP()
#endif
#ifndef DRIVER_PRESETUP
#define DRIVER_PRESETUP()
#endif
#ifndef DRIVER_POSTSETUP
#define DRIVER_POSTSETUP()
#endif
#ifndef DRIVER_IOCTLS
#define DRIVER_IOCTLS
#endif
#ifndef DRIVER_FOPS
#if LINUX_VERSION_CODE >= 0x020400
#define DRIVER_FOPS				\
static struct file_operations	DRM(fops) = {	\
	owner:   THIS_MODULE,			\
	open:	 DRM(open),			\
	flush:	 DRM(flush),			\
	release: DRM(release),			\
	ioctl:	 DRM(ioctl),			\
	mmap:	 DRM(mmap),			\
	read:	 DRM(read),			\
	fasync:	 DRM(fasync),			\
	poll:	 DRM(poll),			\
}
#else
#define DRIVER_FOPS				\
static struct file_operations	DRM(fops) = {	\
	open:	 DRM(open),			\
	flush:	 DRM(flush),			\
	release: DRM(release),			\
	ioctl:	 DRM(ioctl),			\
	mmap:	 DRM(mmap),			\
	read:	 DRM(read),			\
	fasync:	 DRM(fasync),			\
	poll:	 DRM(poll),			\
}
#endif
#endif


/*
 * The default number of instances (minor numbers) to initialize.
 */
#ifndef DRIVER_NUM_CARDS
#define DRIVER_NUM_CARDS 1
#endif

static drm_device_t	*DRM(device);
static int		*DRM(minor);
static int		DRM(numdevs) = 0;

DRIVER_FOPS;

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 },

#if __HAVE_CTX_BITMAP
	[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { DRM(setsareactx), 1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { DRM(getsareactx), 1, 0 },
#endif

	[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

#if __HAVE_SG
	[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)]      = { DRM(sg_alloc),    1, 1 },
	[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)]       = { DRM(sg_free),     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" );
MODULE_LICENSE("GPL and additional rights");

static int DRM(setup)( drm_device_t *dev )
{
	int i;

	DRIVER_PRESETUP();
	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.
	 */
	DRIVER_POSTSETUP();
	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, *list_next;
	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 ) {
		for(list = dev->maplist->head.next;
		    list != &dev->maplist->head;
		    list = list_next) {
			list_next = list->next;
			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;
                       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);
 		}
		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;
}

/*
 * Figure out how many instances to initialize.
 */
static int drm_count_cards(void)
{
	int num = 0;
#if defined(DRIVER_CARD_LIST)
	int i;
	drm_pci_list_t *l;
	u16 device, vendor;
	struct pci_dev *pdev = NULL;
#endif

	DRM_DEBUG( "\n" );

#if defined(DRIVER_COUNT_CARDS)
	num = DRIVER_COUNT_CARDS();
#elif defined(DRIVER_CARD_LIST)
	for (i = 0, l = DRIVER_CARD_LIST; l[i].vendor != 0; i++) {
		pdev = NULL;
		vendor = l[i].vendor;
		device = l[i].device;
		if(device == 0xffff) device = PCI_ANY_ID;
		if(vendor == 0xffff) vendor = PCI_ANY_ID;
		while ((pdev = pci_find_device(vendor, device, pdev))) {
			num++;
		}
	}
#else
	num = DRIVER_NUM_CARDS;
#endif
	DRM_DEBUG("numdevs = %d\n", num);
	return num;
}

/* 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;