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freebsd/sys/dev/drm/drm_drv.h
Eric Anholt 4775259180 Remove drm_linux.h, move the two useful defines into drm_drv.h. Use fd locking 
on -current.  Actually copy in data from userspace to kernel in the
linux-compat ioctl path.  Make sure ioctl sizes are as expected in the handler
functions.

Reviewed by:	rwatson
2002-09-01 17:45:04 +00:00

1499 lines
37 KiB
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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>
*
* $FreeBSD$
*/
/*
* 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 PCI_ANY_ID
#define PCI_ANY_ID ~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
#ifdef __linux__
#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 /* __linux__ */
#ifdef __FreeBSD__
#if DRM_LINUX
#include <sys/file.h>
#include <sys/proc.h>
#include <machine/../linux/linux.h>
#include <machine/../linux/linux_proto.h>
#endif
#endif /* __FreeBSD__ */
#endif
/*
* The default number of instances (minor numbers) to initialize.
*/
#ifndef DRIVER_NUM_CARDS
#define DRIVER_NUM_CARDS 1
#endif
#ifdef __FreeBSD__
static int DRM(init)(device_t nbdev);
static void DRM(cleanup)(device_t nbdev);
#define CDEV_MAJOR 145
#define DRIVER_SOFTC(unit) \
((drm_device_t *) devclass_get_softc(DRM(devclass), unit))
#if __REALLY_HAVE_AGP
MODULE_DEPEND(DRIVER_NAME, agp, 1, 1, 1);
#endif
#if DRM_LINUX
MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
#endif
#endif /* __FreeBSD__ */
static drm_device_t *DRM(device);
static int *DRM(minor);
static int DRM(numdevs) = 0;
#ifdef __linux__
DRIVER_FOPS;
#endif /* __linux__ */
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 __REALLY_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 __linux__
#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");
#endif /* __linux__ */
#ifdef __FreeBSD__
static int DRM(probe)(device_t dev)
{
const char *s = 0;
int pciid=pci_get_devid(dev);
int vendor = (pciid & 0x0000ffff);
int device = (pciid & 0xffff0000) >> 16;
int i=0, done=0;
/*DRM_INFO("Checking PCI vendor=%d, device=%d\n", vendor, device);*/
while ( !done && (DRM(devicelist)[i].vendor != 0 ) ) {
if ( (DRM(devicelist)[i].vendor == vendor) &&
(DRM(devicelist)[i].device == device) ) {
done=1;
if ( DRM(devicelist)[i].supported )
s = DRM(devicelist)[i].name;
else
DRM_INFO("%s not supported\n", DRM(devicelist)[i].name);
}
i++;
}
if (s) {
device_set_desc(dev, s);
return 0;
}
return ENXIO;
}
static int DRM(attach)(device_t dev)
{
return DRM(init)(dev);
}
static int DRM(detach)(device_t dev)
{
DRM(cleanup)(dev);
return 0;
}
static device_method_t DRM(methods)[] = {
/* Device interface */
DEVMETHOD(device_probe, DRM( probe)),
DEVMETHOD(device_attach, DRM( attach)),
DEVMETHOD(device_detach, DRM( detach)),
{ 0, 0 }
};
static driver_t DRM(driver) = {
"drm",
DRM(methods),
sizeof(drm_device_t),
};
static devclass_t DRM( devclass);
static struct cdevsw DRM( cdevsw) = {
/* open */ DRM( open ),
/* close */ DRM( close ),
/* read */ DRM( read ),
/* write */ DRM( write ),
/* ioctl */ DRM( ioctl ),
/* poll */ DRM( poll ),
/* mmap */ DRM( mmap ),
/* strategy */ nostrategy,
/* name */ DRIVER_NAME,
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_TTY | D_TRACKCLOSE,
#if __FreeBSD_version >= 500000
/* kqfilter */ 0
#else
/* bmaj */ -1
#endif
};
#endif /* __FreeBSD__ */
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 DRM_OS_ERR(ENOMEM);
memset(dev->maplist, 0, sizeof(*dev->maplist));
#ifdef __linux__
INIT_LIST_HEAD(&dev->maplist->head);
#endif /* __linux__ */
#ifdef __FreeBSD__
TAILQ_INIT(dev->maplist);
#endif /* __FreeBSD__ */
dev->map_count = 0;
dev->vmalist = NULL;
dev->lock.hw_lock = NULL;
#ifdef __linux__
init_waitqueue_head( &dev->lock.lock_queue );
#endif /* __linux__ */
#ifdef __FreeBSD__
dev->lock.lock_queue = 0;
#endif /* __FreeBSD__ */
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;
#ifdef __linux__
init_timer( &dev->timer );
init_waitqueue_head( &dev->context_wait );
#endif /* __linux__ */
#ifdef __FreeBSD__
#if __FreeBSD_version >= 500000
callout_init( &dev->timer, 1 );
#else
callout_init( &dev->timer );
#endif
dev->context_wait = 0;
#endif /* __FreeBSD__ */
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;
#ifdef __linux__
dev->buf_async = NULL;
init_waitqueue_head( &dev->buf_readers );
init_waitqueue_head( &dev->buf_writers );
#endif /* __linux__ */
#ifdef __FreeBSD__
dev->buf_sigio = NULL;
dev->buf_readers = 0;
dev->buf_writers = 0;
dev->buf_selecting = 0;
#endif /* __FreeBSD__ */
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;
#ifdef __linux__
drm_map_list_t *r_list;
struct list_head *list, *list_next;
#endif /* __linux__ */
#ifdef __FreeBSD__
drm_map_list_entry_t *list;
#endif /* __FreeBSD__ */
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
DRM_OS_LOCK;
#ifdef __linux__
del_timer( &dev->timer );
#endif /* __linux__ */
#ifdef __FreeBSD__
callout_stop( &dev->timer );
#endif /* __FreeBSD__ */
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;
#ifdef __linux__
if ( entry->bound ) DRM(unbind_agp)( entry->memory );
DRM(free_agp)( entry->memory, entry->pages );
#endif /* __linux__ */
#ifdef __FreeBSD__
if ( entry->bound ) DRM(unbind_agp)( entry->handle );
DRM(free_agp)( entry->handle, entry->pages );
#endif /* __FreeBSD__ */
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 ) {
#ifdef __linux__
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;
#endif /* __linux__ */
#ifdef __FreeBSD__
while ((list=TAILQ_FIRST(dev->maplist))) {
map = list->map;
#endif /* __FreeBSD__ */
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:
#ifdef __linux__
vfree(map->handle);
#endif /* __linux__ */
#ifdef __FreeBSD__
DRM(free_pages)((unsigned long)map->handle,
DRM(order)(map->size)
- PAGE_SHIFT,
DRM_MEM_SAREA);
#endif /* __FreeBSD__ */
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 REALLY_HAVE_SG
* isn't defined.
*/
#if __REALLY_HAVE_SG
if(dev->sg) {
DRM(sg_cleanup)(dev->sg);
dev->sg = NULL;
}
#endif
break;
}
#ifdef __FreeBSD__
TAILQ_REMOVE(dev->maplist, list, link);
DRM(free)(list, sizeof(*list), DRM_MEM_MAPS);
#endif /* __FreeBSD__ */
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;
DRM_OS_WAKEUP_INT(&dev->lock.lock_queue);
}
DRM_OS_UNLOCK;
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++; /* FIXME: What about two cards of the same device id? */
}
}
#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).
*/
#ifdef __linux__
static int __init drm_init( void )
#endif /* __linux__ */
#ifdef __FreeBSD__
static int DRM(init)( device_t nbdev )
#endif /* __FreeBSD__ */
{
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) = DRM_OS_MALLOC(sizeof(*DRM(device)) * DRM(numdevs));
if (!DRM(device)) {
return DRM_OS_ERR(ENOMEM);
}
DRM(minor) = DRM_OS_MALLOC(sizeof(*(DRM(minor))) * DRM(numdevs));
if (!DRM(minor)) {
DRM_OS_FREE(DRM(device));
return DRM_OS_ERR(ENOMEM);
}
DRIVER_PREINIT();
#ifdef __linux__
DRM(mem_init)();
#endif /* __linux__ */
for (i = 0; i < DRM(numdevs); i++) {
#ifdef __linux__
dev = &(DRM(device)[i]);
#endif /* __linux__ */
#ifdef __FreeBSD__
int unit = device_get_unit(nbdev);
/* FIXME??? - multihead !!! */
dev = device_get_softc(nbdev);
#endif /* __FreeBSD__ */
memset( (void *)dev, 0, sizeof(*dev) );
#ifdef __linux__
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;
#endif /* __linux__ */
#ifdef __FreeBSD__
DRM(minor)[i]=unit;
DRM_OS_SPININIT(dev->count_lock, "drm device");
lockinit(&dev->dev_lock, PZERO, "drmlk", 0, 0);
dev->device = nbdev;
dev->devnode = make_dev( &DRM(cdevsw),
unit,
DRM_DEV_UID,
DRM_DEV_GID,
DRM_DEV_MODE,
"dri/card%d", unit );
dev->name = DRIVER_NAME;
DRM(mem_init)();
DRM(sysctl_init)(dev);
TAILQ_INIT(&dev->files);
#endif /* __FreeBSD__ */
#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" );
#ifdef __linux__
DRM(stub_unregister)(DRM(minor)[i]);
#endif /* __linux__ */
#ifdef __FreeBSD__
DRM(sysctl_cleanup)( dev );
destroy_dev(dev->devnode);
#endif /* __FreeBSD__ */
DRM(takedown)( dev );
return DRM_OS_ERR(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" );
#ifdef __linux__
DRM(stub_unregister)(DRM(minor)[i]);
#endif /* __linux__ */
#ifdef __FreeBSD__
DRM(sysctl_cleanup)( dev );
destroy_dev(dev->devnode);
#endif /* __FreeBSD__ */
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.
*/
#ifdef __linux__
static void __exit drm_cleanup( void )
#endif /* __linux__ */
#ifdef __FreeBSD__
static void DRM(cleanup)(device_t nbdev)
#endif /* __FreeBSD__ */
{
drm_device_t *dev;
int i;
DRM_DEBUG( "\n" );
for (i = DRM(numdevs) - 1; i >= 0; i--) {
#ifdef __linux__
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" );
}
}
#endif /* __linux__ */
#ifdef __FreeBSD__
/* FIXME??? - multihead */
dev = device_get_softc(nbdev);
DRM(sysctl_cleanup)( dev );
destroy_dev(dev->devnode);
#endif /* __FreeBSD__ */
#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_OS_FREE(DRM(minor));
DRM_OS_FREE(DRM(device));
DRM(numdevs) = 0;
}
#ifdef __linux__
module_init( drm_init );
module_exit( drm_cleanup );
#endif /* __linux__ */
int DRM(version)( DRM_OS_IOCTL )
{
drm_version_t version;
int len;
DRM_OS_KRNFROMUSR( version, (drm_version_t *)data, sizeof(version) );
#define DRM_COPY( name, value ) \
len = strlen( value ); \
if ( len > name##_len ) len = name##_len; \
name##_len = strlen( value ); \
if ( len && name ) { \
if ( DRM_OS_COPYTOUSR( name, value, len ) ) \
return DRM_OS_ERR(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 );
DRM_OS_KRNTOUSR( (drm_version_t *)data, version, sizeof(version) );
return 0;
}
#ifdef __linux__
int DRM(open)( struct inode *inode, struct file *filp )
#endif /* __linux__ */
#ifdef __FreeBSD__
int DRM( open)(dev_t kdev, int flags, int fmt, DRM_OS_STRUCTPROC *p)
#endif /* __FreeBSD__ */
{
drm_device_t *dev = NULL;
int retcode = 0;
int i;
for (i = 0; i < DRM(numdevs); i++) {
#ifdef __linux__
if (MINOR(inode->i_rdev) == DRM(minor)[i]) {
dev = &(DRM(device)[i]);
break;
}
#endif /* __linux__ */
#ifdef __FreeBSD__
/* FIXME ??? - multihead */
dev = DRIVER_SOFTC(minor(kdev));
#endif /* __FreeBSD__ */
}
if (!dev) {
return DRM_OS_ERR(ENODEV);
}
DRM_DEBUG( "open_count = %d\n", dev->open_count );
#ifdef __linux__
retcode = DRM(open_helper)( inode, filp, dev );
#endif /* __linux__ */
#ifdef __FreeBSD__
device_busy(dev->device);
retcode = DRM(open_helper)(kdev, flags, fmt, p, dev);
#endif /* __FreeBSD__ */
if ( !retcode ) {
atomic_inc( &dev->counts[_DRM_STAT_OPENS] );
DRM_OS_SPINLOCK( &dev->count_lock );
if ( !dev->open_count++ ) {
DRM_OS_SPINUNLOCK( &dev->count_lock );
return DRM(setup)( dev );
}
DRM_OS_SPINUNLOCK( &dev->count_lock );
}
#ifdef __FreeBSD__
device_unbusy(dev->device);
#endif /* __FreeBSD__ */
return retcode;
}
#ifdef __linux__
int DRM(release)( struct inode *inode, struct file *filp )
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev;
#endif /* __linux__ */
#ifdef __FreeBSD__
int DRM( close)(dev_t kdev, int flags, int fmt, DRM_OS_STRUCTPROC *p)
{
drm_file_t *priv;
drm_device_t *dev = kdev->si_drv1;
#endif /* __FreeBSD__ */
int retcode = 0;
#ifdef __linux__
lock_kernel();
dev = priv->dev;
#endif /* __linux__ */
DRM_DEBUG( "open_count = %d\n", dev->open_count );
#ifdef __FreeBSD__
priv = DRM(find_file_by_proc)(dev, p);
if (!priv) {
DRM_DEBUG("can't find authenticator\n");
return EINVAL;
}
#endif /* __FreeBSD__ */
DRIVER_PRERELEASE();
/* ========================================================
* Begin inline drm_release
*/
DRM_DEBUG( "pid = %d, device = 0x%lx, open_count = %d\n",
DRM_OS_CURRENTPID, (long)dev->device, dev->open_count );
if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
&& dev->lock.pid == DRM_OS_CURRENTPID) {
DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
DRM_OS_CURRENTPID,
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
#if HAVE_DRIVER_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 */
#ifdef __linux__
DECLARE_WAITQUEUE( entry, current );
add_wait_queue( &dev->lock.lock_queue, &entry );
#endif /* __linux__ */
for (;;) {
#ifdef __linux__
current->state = TASK_INTERRUPTIBLE;
#endif /* __linux__ */
if ( !dev->lock.hw_lock ) {
/* Device has been unregistered */
retcode = DRM_OS_ERR(EINTR);
break;
}
if ( DRM(lock_take)( &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT ) ) {
#ifdef __linux__
dev->lock.pid = priv->pid;
#endif /* __linux__ */
#ifdef __FreeBSD__
dev->lock.pid = p->p_pid;
#endif /* __FreeBSD__ */
dev->lock.lock_time = jiffies;
atomic_inc( &dev->counts[_DRM_STAT_LOCKS] );
break; /* Got lock */
}
/* Contention */
#if 0
atomic_inc( &dev->total_sleeps );
#endif
#ifdef __linux__
schedule();
if ( signal_pending( current ) ) {
retcode = DRM_OS_ERR(ERESTARTSYS);
break;
}
#endif /* __linux__ */
#ifdef __FreeBSD__
retcode = tsleep(&dev->lock.lock_queue,
PZERO|PCATCH,
"drmlk2",
0);
if (retcode)
break;
#endif /* __FreeBSD__ */
}
#ifdef __linux__
current->state = TASK_RUNNING;
remove_wait_queue( &dev->lock.lock_queue, &entry );
#endif /* __linux__ */
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
#ifdef __linux__
DRM(fasync)( -1, filp, 0 );
#endif /* __linux__ */
#ifdef __FreeBSD__
funsetown(&dev->buf_sigio);
#endif /* __FreeBSD__ */
DRM_OS_LOCK;
#ifdef __linux__
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;
}
#endif /* __linux__ */
#ifdef __FreeBSD__
priv = DRM(find_file_by_proc)(dev, p);
if (priv) {
priv->refs--;
if (!priv->refs) {
TAILQ_REMOVE(&dev->files, priv, link);
}
}
#endif /* __FreeBSD__ */
DRM_OS_UNLOCK;
DRM(free)( priv, sizeof(*priv), DRM_MEM_FILES );
/* ========================================================
* End inline drm_release
*/
atomic_inc( &dev->counts[_DRM_STAT_CLOSES] );
DRM_OS_SPINLOCK( &dev->count_lock );
if ( !--dev->open_count ) {
if ( atomic_read( &dev->ioctl_count ) || dev->blocked ) {
DRM_ERROR( "Device busy: %ld %d\n",
(unsigned long)atomic_read( &dev->ioctl_count ),
dev->blocked );
DRM_OS_SPINUNLOCK( &dev->count_lock );
#ifdef __linux__
unlock_kernel();
#endif /* __linux__ */
return DRM_OS_ERR(EBUSY);
}
DRM_OS_SPINUNLOCK( &dev->count_lock );
#ifdef __linux__
unlock_kernel();
#endif /* __linux__ */
#ifdef __FreeBSD__
device_unbusy(dev->device);
#endif /* __FreeBSD__ */
return DRM(takedown)( dev );
}
DRM_OS_SPINUNLOCK( &dev->count_lock );
#ifdef __linux__
unlock_kernel();
#endif /* __linux__ */
return retcode;
}
/* DRM(ioctl) is called whenever a process performs an ioctl on /dev/drm.
*/
int DRM(ioctl)( DRM_OS_IOCTL )
{
DRM_OS_DEVICE;
int retcode = 0;
drm_ioctl_desc_t *ioctl;
drm_ioctl_t *func;
int nr = DRM_IOCTL_NR(cmd);
DRM_OS_PRIV;
atomic_inc( &dev->ioctl_count );
atomic_inc( &dev->counts[_DRM_STAT_IOCTLS] );
++priv->ioctl_count;
DRM_DEBUG( "pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
DRM_OS_CURRENTPID, cmd, nr, (long)dev->device, priv->authenticated );
#ifdef __FreeBSD__
switch (cmd) {
case FIONBIO:
atomic_dec(&dev->ioctl_count);
return 0;
case FIOASYNC:
atomic_dec(&dev->ioctl_count);
dev->flags |= FASYNC;
return 0;
case FIOSETOWN:
atomic_dec(&dev->ioctl_count);
return fsetown(*(int *)data, &dev->buf_sigio);
case FIOGETOWN:
atomic_dec(&dev->ioctl_count);
*(int *) data = fgetown(dev->buf_sigio);
return 0;
}
#endif /* __FreeBSD__ */
if ( nr >= DRIVER_IOCTL_COUNT ) {
retcode = DRM_OS_ERR(EINVAL);
} else {
ioctl = &DRM(ioctls)[nr];
func = ioctl->func;
if ( !func ) {
DRM_DEBUG( "no function\n" );
retcode = DRM_OS_ERR(EINVAL);
} else if ( ( ioctl->root_only && DRM_OS_CHECKSUSER )
|| ( ioctl->auth_needed && !priv->authenticated ) ) {
retcode = DRM_OS_ERR(EACCES);
} else {
retcode = func( IOCTL_ARGS_PASS );
}
}
atomic_dec( &dev->ioctl_count );
return retcode;
}
int DRM(lock)( DRM_OS_IOCTL )
{
DRM_OS_DEVICE;
#ifdef __linux__
DECLARE_WAITQUEUE( entry, current );
#endif /* __linux__ */
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
DRM_OS_KRNFROMUSR( lock, (drm_lock_t *)data, sizeof(lock) );
if ( lock.context == DRM_KERNEL_CONTEXT ) {
DRM_ERROR( "Process %d using kernel context %d\n",
DRM_OS_CURRENTPID, lock.context );
return DRM_OS_ERR(EINVAL);
}
DRM_DEBUG( "%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
lock.context, DRM_OS_CURRENTPID,
dev->lock.hw_lock->lock, lock.flags );
#if __HAVE_DMA_QUEUE
if ( lock.context < 0 )
return DRM_OS_ERR(EINVAL);
#elif __HAVE_MULTIPLE_DMA_QUEUES
if ( lock.context < 0 || lock.context >= dev->queue_count )
return DRM_OS_ERR(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 ) {
#ifdef __linux__
add_wait_queue( &dev->lock.lock_queue, &entry );
#endif /* __linux__ */
for (;;) {
#ifdef __linux__
current->state = TASK_INTERRUPTIBLE;
#endif /* __linux__ */
if ( !dev->lock.hw_lock ) {
/* Device has been unregistered */
ret = DRM_OS_ERR(EINTR);
break;
}
if ( DRM(lock_take)( &dev->lock.hw_lock->lock,
lock.context ) ) {
dev->lock.pid = DRM_OS_CURRENTPID;
dev->lock.lock_time = jiffies;
atomic_inc( &dev->counts[_DRM_STAT_LOCKS] );
break; /* Got lock */
}
/* Contention */
#ifdef __linux__
schedule();
if ( signal_pending( current ) ) {
ret = DRM_OS_ERR(ERESTARTSYS);
break;
}
#endif /* __linux__ */
#ifdef __FreeBSD__
ret = tsleep(&dev->lock.lock_queue,
PZERO|PCATCH,
"drmlk2",
0);
if (ret)
break;
#endif /* __FreeBSD__ */
}
#ifdef __linux__
current->state = TASK_RUNNING;
remove_wait_queue( &dev->lock.lock_queue, &entry );
#endif /* __linux__ */
}
#if __HAVE_DMA_FLUSH
DRM(flush_unblock)( dev, lock.context, lock.flags ); /* cleanup phase */
#endif
if ( !ret ) {
#ifdef __linux__
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 );
#endif /* __linux__ */
#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)( DRM_OS_IOCTL )
{
DRM_OS_DEVICE;
drm_lock_t lock;
DRM_OS_KRNFROMUSR( lock, (drm_lock_t *)data, sizeof(lock) ) ;
if ( lock.context == DRM_KERNEL_CONTEXT ) {
DRM_ERROR( "Process %d using kernel context %d\n",
DRM_OS_CURRENTPID, lock.context );
return DRM_OS_ERR(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 */
#ifdef __linux__
unblock_all_signals();
#endif /* __linux__ */
return 0;
}
#if DRM_LINUX
#define LINUX_IOCTL_DRM_MIN 0x6400
#define LINUX_IOCTL_DRM_MAX 0x64ff
static linux_ioctl_function_t DRM( linux_ioctl);
static struct linux_ioctl_handler DRM( handler) = {DRM( linux_ioctl), LINUX_IOCTL_DRM_MIN, LINUX_IOCTL_DRM_MAX};
SYSINIT (DRM( register), SI_SUB_KLD, SI_ORDER_MIDDLE, linux_ioctl_register_handler, &DRM( handler));
SYSUNINIT(DRM( unregister), SI_SUB_KLD, SI_ORDER_MIDDLE, linux_ioctl_unregister_handler, &DRM( handler));
#define LINUX_IOC_VOID IOC_VOID
#define LINUX_IOC_IN IOC_OUT /* Linux has the values the other way around */
#define LINUX_IOC_OUT IOC_IN
/*
* Linux emulation IOCTL
*/
static int
DRM(linux_ioctl)(DRM_OS_STRUCTPROC *p, struct linux_ioctl_args* args)
{
u_long cmd = args->cmd;
#define STK_PARAMS 128
union {
char stkbuf[STK_PARAMS];
long align;
} ubuf;
caddr_t data=NULL, memp=NULL;
u_int size = IOCPARM_LEN(cmd);
int error;
#if (__FreeBSD_version >= 500000)
struct file *fp;
#else
struct file *fp = p->p_fd->fd_ofiles[args->fd];
#endif
if ( size > STK_PARAMS ) {
if ( size > IOCPARM_MAX )
return EINVAL;
memp = malloc( (u_long)size, DRM(M_DRM), M_WAITOK );
data = memp;
} else {
data = ubuf.stkbuf;
}
if ( cmd & LINUX_IOC_IN ) {
if ( size ) {
error = copyin( (caddr_t)args->arg, data, (u_int)size );
if (error) {
if ( memp )
free( data, DRM(M_DRM) );
return error;
}
} else {
data = (caddr_t)args->arg;
}
} else if ( (cmd & LINUX_IOC_OUT) && size ) {
/*
* Zero the buffer so the user always
* gets back something deterministic.
*/
bzero( data, size );
} else if ( cmd & LINUX_IOC_VOID ) {
*(caddr_t *)data = (caddr_t)args->arg;
}
#if (__FreeBSD_version >= 500000)
if ( (error = fget( p, args->fd, &fp )) != 0 ) {
if ( memp )
free( memp, DRM(M_DRM) );
return (error);
}
error = fo_ioctl( fp, cmd, data, p->td_ucred, p );
fdrop( fp, p );
#else
error = fo_ioctl( fp, cmd, data, p );
#endif
if ( error == 0 && (cmd & LINUX_IOC_OUT) && size )
error = copyout( data, (caddr_t)args->arg, (u_int)size );
if ( memp )
free( memp, DRM(M_DRM) );
return error;
}
#endif /* DRM_LINUX */
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