patch-2.4.8 linux/drivers/char/drm/drm_drv.h
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- Lines: 1067
- Date:
Wed Aug 8 09:42:14 2001
- Orig file:
v2.4.7/linux/drivers/char/drm/drm_drv.h
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/drm_drv.h linux/drivers/char/drm/drm_drv.h
@@ -0,0 +1,1066 @@
+/* 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
+#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" );
+
+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;
+ 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 ) {
+#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
+#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] );
+
+ 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;
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)