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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [drm/] [drm_drv.h] - Blame information for rev 1765

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/* 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 __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
#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),                   \
}
#endif
 
#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.
 */
/* Use an additional macro to avoid preprocessor troubles */
#define DRM_OPTIONS_FUNC DRM(options)
static int __init DRM(options)( char *str )
{
        DRM(parse_options)( str );
        return 1;
}
 
__setup( DRIVER_NAME "=", DRM_OPTIONS_FUNC );
#undef DRM_OPTIONS_FUNC
#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.
         */
        [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]       = { DRM(control),     1, 1 },
#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
 
#if __HAVE_VBL_IRQ
        [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)]   = { DRM(wait_vblank), 0, 0 },
#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->sigdata.lock = 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, 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);
                }
                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->sigdata.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;
        int i;
#if __HAVE_CTX_BITMAP
        int retcode;
#endif
        DRM_DEBUG( "\n" );
 
#ifdef MODULE
        DRM(parse_options)( drm_opts );
#endif
 
        DRM(numdevs) = drm_count_cards();
        /* Force at least one instance. */
        if (DRM(numdevs) <= 0)
                DRM(numdevs) = 1;
 
        DRM(device) = kmalloc(sizeof(*DRM(device)) * DRM(numdevs), GFP_KERNEL);
        if (!DRM(device)) {
                return -ENOMEM;
        }
        DRM(minor) = kmalloc(sizeof(*DRM(minor)) * DRM(numdevs), GFP_KERNEL);
        if (!DRM(minor)) {
                kfree(DRM(device));
                return -ENOMEM;
        }
 
        DRIVER_PREINIT();
 
        DRM(mem_init)();
 
        for (i = 0; i < DRM(numdevs); i++) {
                dev = &(DRM(device)[i]);
                memset( (void *)dev, 0, sizeof(*dev) );
                dev->count_lock = SPIN_LOCK_UNLOCKED;
                sema_init( &dev->struct_sem, 1 );
 
                if ((DRM(minor)[i] = DRM(stub_register)(DRIVER_NAME, &DRM(fops),dev)) < 0)
                        return -EPERM;
                dev->device = MKDEV(DRM_MAJOR, DRM(minor)[i] );
                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)[i]);
                        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)[i]);
                        DRM(takedown)( dev );
                        return retcode;
                }
#endif
                DRM_INFO( "Initialized %s %d.%d.%d %s on minor %d\n",
                        DRIVER_NAME,
                        DRIVER_MAJOR,
                        DRIVER_MINOR,
                        DRIVER_PATCHLEVEL,
                        DRIVER_DATE,
                        DRM(minor)[i] );
        }
 
        DRIVER_POSTINIT();
 
        return 0;
}
 
/* drm_cleanup is called via cleanup_module at module unload time.
 */
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)(DRM(minor)[i]) ) {
                        DRM_ERROR( "Cannot unload module\n" );
                } else {
                        DRM_DEBUG("minor %d unregistered\n", DRM(minor)[i]);
                        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();
        kfree(DRM(minor));
        kfree(DRM(device));
        DRM(numdevs) = 0;
}
 
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 = NULL;
        int retcode = 0;
        int i;
 
        for (i = 0; i < DRM(numdevs); i++) {
                if (minor(inode->i_rdev) == DRM(minor)[i]) {
                        dev = &(DRM(device)[i]);
                        break;
                }
        }
        if (!dev) {
                return -ENODEV;
        }
 
        DRM_DEBUG( "open_count = %d\n", dev->open_count );
 
        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 );
        }
 
        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%lx, open_count = %d\n",
                   current->pid, (long)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
         */
 
        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%lx, auth=%d\n",
                   current->pid, cmd, nr, (long)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
#if __HAVE_KERNEL_CTX_SWITCH
                if ( dev->last_context != lock.context ) {
                        DRM(context_switch)(dev, dev->last_context,
                                            lock.context);
                }
#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] );
 
#if __HAVE_KERNEL_CTX_SWITCH
        /* We no longer really hold it, but if we are the next
         * agent to request it then we should just be able to
         * take it immediately and not eat the ioctl.
         */
        dev->lock.pid = 0;
        {
                __volatile__ unsigned int *plock = &dev->lock.hw_lock->lock;
                unsigned int old, new, prev, ctx;
 
                ctx = lock.context;
                do {
                        old  = *plock;
                        new  = ctx;
                        prev = cmpxchg(plock, old, new);
                } while (prev != old);
        }
        wake_up_interruptible(&dev->lock.lock_queue);
#else
        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" );
                }
        }
#endif /* !__HAVE_KERNEL_CTX_SWITCH */
 
        unblock_all_signals();
        return 0;
}
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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [drm/] [drm_drv.h] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/* drm_drv.h -- Generic driver template -- linux-c --`
2			`* Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com`
3			`*`
4			`* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.`
5			`* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.`
6			`* All Rights Reserved.`
7			`*`
8			`* Permission is hereby granted, free of charge, to any person obtaining a`
9			`* copy of this software and associated documentation files (the "Software"),`
10			`* to deal in the Software without restriction, including without limitation`
11			`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`
12			`* and/or sell copies of the Software, and to permit persons to whom the`
13			`* Software is furnished to do so, subject to the following conditions:`
14			`*`
15			`* The above copyright notice and this permission notice (including the next`
16			`* paragraph) shall be included in all copies or substantial portions of the`
17			`* Software.`
18			`*`
19			`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`
20			`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`
21			`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL`
22			`* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR`
23			`* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,`
24			`* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR`
25			`* OTHER DEALINGS IN THE SOFTWARE.`
26			`*`
27			`* Authors:`
28			`* Rickard E. (Rik) Faith <faith@valinux.com>`
29			`* Gareth Hughes <gareth@valinux.com>`
30			`*/`
31
32			`/*`
33			`* To use this template, you must at least define the following (samples`
34			`* given for the MGA driver):`
35			`*`
36			`* #define DRIVER_AUTHOR "VA Linux Systems, Inc."`
37			`*`
38			`* #define DRIVER_NAME "mga"`
39			`* #define DRIVER_DESC "Matrox G200/G400"`
40			`* #define DRIVER_DATE "20001127"`