geemili
/
drm
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
drm/linux-core/drm_drv.c

1127 lines
30 KiB
C
Raw Blame History

/**
* \file drm_drv.h
* Generic driver template
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*
* To use this template, you must at least define the following (samples
* given for the MGA driver):
*
* \code
* #define DRIVER_AUTHOR "VA Linux Systems, Inc."
*
* #define DRIVER_NAME "mga"
* #define DRIVER_DESC "Matrox G200/G400"
* #define DRIVER_DATE "20001127"
*
* #define DRIVER_MAJOR 2
* #define DRIVER_MINOR 0
* #define DRIVER_PATCHLEVEL 2
*
* #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( mga_ioctls )
*
* #define drm_x mga_##x
* \endcode
*/
/*
* Created: Thu Nov 23 03:10:50 2000 by 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.
*/
#include "drmP.h"
#include "drm_core.h"
static void __exit drm_cleanup( drm_device_t *dev );
#ifndef MODULE
/** Use an additional macro to avoid preprocessor troubles */
#define DRM_OPTIONS_FUNC drm_options
/**
* Called by the kernel to parse command-line options passed via the
* boot-loader (e.g., LILO). It calls the insmod option routine,
* parse_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
int drm_fb_loaded = 0;
/** Ioctl table */
drm_ioctl_desc_t drm_ioctls[] = {
[DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { drm_version, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_by_busid, 0, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = { drm_getmap, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = { drm_getclient, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = { drm_getstats, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)] = { drm_setversion, 0, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_noop, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_noop, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { drm_rmmap, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { drm_setsareactx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { drm_getsareactx, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { drm_addctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { drm_rmctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { drm_modctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { drm_getctx, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { drm_switchctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { drm_newctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { drm_resctx, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { drm_lock, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { drm_unlock, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_noop, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { drm_addbufs, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { drm_markbufs, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { drm_infobufs, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { drm_mapbufs, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { drm_freebufs, 1, 0 },
/* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { drm_control, 1, 1 },
#if __OS_HAS_AGP
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { drm_agp_alloc, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { drm_agp_free, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { drm_agp_bind, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { drm_agp_unbind, 1, 1 },
#endif
[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = { drm_sg_alloc, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = { drm_sg_free, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = { drm_wait_vblank, 0, 0 },
};
#define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( drm_ioctls )
static int drm_setup( drm_device_t *dev )
{
int i;
if (dev->fn_tbl->presetup)
dev->fn_tbl->presetup(dev);
atomic_set( &dev->ioctl_count, 0 );
atomic_set( &dev->vma_count, 0 );
dev->buf_use = 0;
atomic_set( &dev->buf_alloc, 0 );
if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
{
i = drm_dma_setup( dev );
if ( i < 0 )
return i;
}
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->ctxlist = drm_alloc(sizeof(*dev->ctxlist),
DRM_MEM_CTXLIST);
if(dev->ctxlist == NULL) return -ENOMEM;
memset(dev->ctxlist, 0, sizeof(*dev->ctxlist));
INIT_LIST_HEAD(&dev->ctxlist->head);
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_enabled = 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_waitqueue_head( &dev->context_wait );
dev->if_version = 0;
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.
*/
if (dev->fn_tbl->postsetup)
dev->fn_tbl->postsetup(dev);
return 0;
}
/**
* Take down the DRM device.
*
* \param dev DRM device structure.
*
* Frees every resource in \p dev.
*
* \sa drm_device and setup().
*/
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" );
if (dev->fn_tbl->pretakedown)
dev->fn_tbl->pretakedown(dev);
if ( dev->irq_enabled ) drm_irq_uninstall( dev );
down( &dev->struct_sem );
del_timer( &dev->timer );
if ( dev->devname ) {
drm_free( dev->devname, strlen( dev->devname ) + 1,
DRM_MEM_DRIVER );
dev->devname = NULL;
}
if ( dev->unique ) {
drm_free( dev->unique, strlen( dev->unique ) + 1,
DRM_MEM_DRIVER );
dev->unique = NULL;
dev->unique_len = 0;
}
/* Clear pid list */
for ( i = 0 ; i < DRM_HASH_SIZE ; i++ ) {
for ( pt = dev->magiclist[i].head ; pt ; pt = next ) {
next = pt->next;
drm_free( pt, sizeof(*pt), DRM_MEM_MAGIC );
}
dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
}
/* Clear AGP information */
if (drm_core_has_AGP(dev) && dev->agp) {
drm_agp_mem_t *entry;
drm_agp_mem_t *nexte;
/* Remove AGP resources, but leave dev->agp
intact until drv_cleanup is called. */
for ( entry = dev->agp->memory ; entry ; entry = nexte ) {
nexte = entry->next;
if ( entry->bound ) drm_unbind_agp( entry->memory );
drm_free_agp( entry->memory, entry->pages );
drm_free( entry, sizeof(*entry), DRM_MEM_AGPLISTS );
}
dev->agp->memory = NULL;
if ( dev->agp->acquired ) drm_agp_do_release();
dev->agp->acquired = 0;
dev->agp->enabled = 0;
}
/* Clear vma list (only built for debugging) */
if ( dev->vmalist ) {
for ( vma = dev->vmalist ; vma ; vma = vma_next ) {
vma_next = vma->next;
drm_free( vma, sizeof(*vma), DRM_MEM_VMAS );
}
dev->vmalist = NULL;
}
if( dev->maplist ) {
list_for_each_safe( list, list_next, &dev->maplist->head ) {
r_list = (drm_map_list_t *)list;
if ( ( map = r_list->map ) ) {
switch ( map->type ) {
case _DRM_REGISTERS:
case _DRM_FRAME_BUFFER:
continue;
case _DRM_SHM:
vfree(map->handle);
break;
case _DRM_AGP:
/* Do nothing here, because this is all
* handled in the AGP/GART driver.
*/
break;
case _DRM_SCATTER_GATHER:
/* Handle it */
if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) {
drm_sg_cleanup(dev->sg);
dev->sg = NULL;
}
break;
}
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
}
list_del( list );
drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS);
}
}
if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
for ( i = 0 ; i < dev->queue_count ; i++ ) {
if ( dev->queuelist[i] ) {
drm_free( dev->queuelist[i],
sizeof(*dev->queuelist[0]),
DRM_MEM_QUEUES );
dev->queuelist[i] = NULL;
}
}
drm_free( dev->queuelist,
dev->queue_slots * sizeof(*dev->queuelist),
DRM_MEM_QUEUES );
dev->queuelist = NULL;
}
dev->queue_count = 0;
if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
drm_dma_takedown( dev );
if ( dev->lock.hw_lock ) {
dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */
dev->lock.filp = NULL;
wake_up_interruptible( &dev->lock.lock_queue );
}
up( &dev->struct_sem );
return 0;
}
int drm_fill_in_dev(drm_device_t *dev, struct pci_dev *pdev, const struct pci_device_id *ent, struct drm_driver_fn *driver_fn)
{
int retcode;
dev->count_lock = SPIN_LOCK_UNLOCKED;
init_timer( &dev->timer );
sema_init( &dev->struct_sem, 1 );
sema_init( &dev->ctxlist_sem, 1 );
dev->name = DRIVER_NAME;
dev->pdev = pdev;
#ifdef __alpha__
dev->hose = pdev->sysdata;
dev->pci_domain = dev->hose->bus->number;
#else
dev->pci_domain = 0;
#endif
dev->pci_bus = pdev->bus->number;
dev->pci_slot = PCI_SLOT(pdev->devfn);
dev->pci_func = PCI_FUNC(pdev->devfn);
dev->irq = pdev->irq;
dev->maplist = drm_calloc(1, sizeof(*dev->maplist), DRM_MEM_MAPS);
if(dev->maplist == NULL) return -ENOMEM;
INIT_LIST_HEAD(&dev->maplist->head);
/* the DRM has 6 counters */
dev->counters = 6;
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;
dev->fn_tbl = driver_fn;
if (dev->fn_tbl->preinit)
if ((retcode = dev->fn_tbl->preinit(dev, ent->driver_data)))
goto error_out_unreg;
if (drm_core_has_AGP(dev)) {
dev->agp = drm_agp_init();
if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) && (dev->agp == NULL)) {
DRM_ERROR( "Cannot initialize the agpgart module.\n" );
retcode = -EINVAL;
goto error_out_unreg;
}
if (drm_core_has_MTRR(dev)) {
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 );
}
}
retcode = drm_ctxbitmap_init( dev );
if( retcode ) {
DRM_ERROR( "Cannot allocate memory for context bitmap.\n" );
goto error_out_unreg;
}
dev->device = MKDEV(DRM_MAJOR, dev->minor );
DRM_DEBUG("driver_fn->postinit %p\n", driver_fn->postinit);
/* postinit is a required function to display the signon banner */
/* drivers add secondary heads here if needed */
if ((retcode = dev->fn_tbl->postinit(dev, ent->driver_data)))
goto error_out_unreg;
return 0;
error_out_unreg:
drm_takedown(dev);
return retcode;
}
void __exit drm_cleanup_pci(struct pci_dev *pdev)
{
drm_device_t *dev = pci_get_drvdata(pdev);
pci_set_drvdata(pdev, NULL);
pci_release_regions(pdev);
if (dev)
drm_cleanup(dev);
}
EXPORT_SYMBOL(drm_cleanup_pci);
#ifdef MODULE
static char *drm_opts = NULL;
#endif
MODULE_PARM( drm_opts, "s" );
/**
* Module initialization. Called via init_module at module load time, or via
* linux/init/main.c (this is not currently supported).
*
* \return zero on success or a negative number on failure.
*
* Initializes an array of drm_device structures, and attempts to
* initialize all available devices, using consecutive minors, registering the
* stubs and initializing the AGP device.
*
* Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
* after the initialization for driver customization.
*/
int __devinit drm_init( struct pci_driver *driver, struct pci_device_id* pciidlist, struct drm_driver_fn *driver_fn)
{
struct pci_dev *pdev;
struct pci_device_id *pid;
int i;
DRM_DEBUG( "\n" );
#ifdef MODULE
drm_parse_options( drm_opts );
#endif
drm_mem_init();
for (i=0; (pciidlist[i].vendor != 0) && !drm_fb_loaded; i++) {
pid = &pciidlist[i];
pdev = NULL;
/* pass back in pdev to account for multiple identical cards */
while ((pdev = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, pid->subdevice, pdev))) {
/* is there already a driver loaded, or (short circuit saves work) */
/* does something like VesaFB have control of the memory region? */
if (pci_dev_driver(pdev) || pci_request_regions(pdev, "DRM scan")) {
/* go into stealth mode */
drm_fb_loaded = 1;
pci_dev_put(pdev);
break;
}
/* no fbdev or vesadev, put things back and wait for normal probe */
pci_release_regions(pdev);
}
}
if (drm_fb_loaded == 0)
pci_register_driver(driver);
else {
for (i=0; pciidlist[i].vendor != 0; i++) {
pid = &pciidlist[i];
pdev = NULL;
/* pass back in pdev to account for multiple identical cards */
while ((pdev = pci_get_subsys(pid->vendor, pid->device, pid->subvendor, pid->subdevice, pdev))) {
/* stealth mode requires a manual probe */
drm_probe(pdev, &pciidlist[i], driver_fn);
}
}
DRM_INFO("Used old pci detect: framebuffer loaded\n");
}
return 0;
}
EXPORT_SYMBOL(drm_init);
/**
* Called via cleanup_module() at module unload time.
*
* Cleans up all DRM device, calling takedown().
*
* \sa drm_init().
*/
static void __exit drm_cleanup( drm_device_t *dev )
{
drm_map_t *map;
drm_map_list_t *r_list;
struct list_head *list, *list_next;
DRM_DEBUG( "\n" );
if (!dev) {
DRM_ERROR("cleanup called no dev\n");
return;
}
drm_takedown(dev);
if( dev->maplist ) {
list_for_each_safe( list, list_next, &dev->maplist->head ) {
r_list = (drm_map_list_t *)list;
if ( ( map = r_list->map ) ) {
switch ( map->type ) {
case _DRM_REGISTERS:
drm_ioremapfree( map->handle, map->size, dev );
break;
case _DRM_FRAME_BUFFER:
if ( drm_core_has_MTRR(dev)) {
if ( map->mtrr >= 0 ) {
int retcode;
retcode = mtrr_del( map->mtrr,
map->offset,
map->size );
DRM_DEBUG( "mtrr_del=%d\n", retcode );
}
}
break;
case _DRM_SHM:
case _DRM_AGP:
case _DRM_SCATTER_GATHER:
DRM_DEBUG("Extra maplist item\n");
break;
}
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
}
list_del( list );
drm_free(r_list, sizeof(*r_list), DRM_MEM_MAPS);
}
drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
dev->maplist = NULL;
}
if (drm_fb_loaded==0)
pci_disable_device(dev->pdev);
drm_ctxbitmap_cleanup( dev );
if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && 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 );
}
if (drm_core_has_AGP(dev) && dev->agp ) {
drm_free( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS );
dev->agp = NULL;
}
if (dev->fn_tbl->postcleanup)
dev->fn_tbl->postcleanup(dev);
if ( drm_put_minor(dev) )
DRM_ERROR( "Cannot unload module\n" );
}
void __exit drm_exit (struct pci_driver *driver)
{
int i;
drm_device_t *dev;
drm_minor_t *minor;
DRM_DEBUG( "\n" );
if (drm_fb_loaded) {
for (i = 0; i < cards_limit; i++) {
minor = &drm_minors[i];
dev = minor->dev;
DRM_DEBUG("fb loaded release minor %d\n", dev->minor);
if (minor->class == DRM_MINOR_PRIMARY) {
/* release the pci driver */
if (dev->pdev)
pci_dev_put(dev->pdev);
drm_cleanup(dev);
}
}
} else
pci_unregister_driver(driver);
DRM_INFO( "Module unloaded\n" );
}
EXPORT_SYMBOL(drm_exit);
static int __init drm_core_init(void)
{
int ret = -ENOMEM;
cards_limit = (cards_limit < DRM_MAX_MINOR + 1 ? cards_limit : DRM_MAX_MINOR + 1);
drm_minors = drm_calloc(cards_limit,
sizeof(*drm_minors), DRM_MEM_STUB);
if(!drm_minors)
goto err_p1;
if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
goto err_p1;
drm_class = drm_sysfs_create(THIS_MODULE, "drm");
if (IS_ERR(drm_class)) {
printk (KERN_ERR "DRM: Error creating drm class.\n");
ret = PTR_ERR(drm_class);
goto err_p2;
}
drm_proc_root = create_proc_entry("dri", S_IFDIR, NULL);
if (!drm_proc_root) {
DRM_ERROR("Cannot create /proc/dri\n");
ret = -1;
goto err_p3;
}
drm_agp = (drm_agp_t *)inter_module_get("drm_agp");
DRM_INFO( "Initialized %s %d.%d.%d %s\n",
DRIVER_NAME,
DRIVER_MAJOR,
DRIVER_MINOR,
DRIVER_PATCHLEVEL,
DRIVER_DATE
);
return 0;
err_p3:
drm_sysfs_destroy(drm_class);
err_p2:
unregister_chrdev(DRM_MAJOR, "drm");
drm_free(drm_minors, sizeof(*drm_minors) * cards_limit, DRM_MEM_STUB);
err_p1:
return ret;
}
static void __exit drm_core_exit (void)
{
if (drm_agp)
inter_module_put("drm_agp");
remove_proc_entry("dri", NULL);
drm_sysfs_destroy(drm_class);
unregister_chrdev(DRM_MAJOR, "drm");
drm_free(drm_minors, sizeof(*drm_minors) *
cards_limit, DRM_MEM_STUB);
}
module_init( drm_core_init );
module_exit( drm_core_exit );
/**
* Get version information
*
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg user argument, pointing to a drm_version structure.
* \return zero on success or negative number on failure.
*
* Fills in the version information in \p arg.
*/
int drm_version( 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_version_t __user *argp = (void __user *)arg;
drm_version_t version;
int ret;
if ( copy_from_user( &version, argp, sizeof(version) ) )
return -EFAULT;
/* version is a required function to return the personality module version */
if ((ret = dev->fn_tbl->version(&version)))
return ret;
if ( copy_to_user( argp, &version, sizeof(version) ) )
return -EFAULT;
return 0;
}
/**
* Open file.
*
* \param inode device inode
* \param filp file pointer.
* \return zero on success or a negative number on failure.
*
* Searches the DRM device with the same minor number, calls open_helper(), and
* increments the device open count. If the open count was previous at zero,
* i.e., it's the first that the device is open, then calls setup().
*/
int drm_open( struct inode *inode, struct file *filp )
{
drm_device_t *dev = NULL;
int minor = iminor(inode);
int retcode = 0;
if (!((minor >= 0) && (minor < cards_limit)))
return -ENODEV;
dev = drm_minors[minor].dev;
if (!dev)
return -ENODEV;
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;
}
EXPORT_SYMBOL(drm_open);
/**
* Release file.
*
* \param inode device inode
* \param filp file pointer.
* \return zero on success or a negative number on failure.
*
* If the hardware lock is held then free it, and take it again for the kernel
* context since it's necessary to reclaim buffers. Unlink the file private
* data from its list and free it. Decreases the open count and if it reaches
* zero calls takedown().
*/
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 );
if (dev->fn_tbl->prerelease)
dev->fn_tbl->prerelease(dev, filp);
/* ========================================================
* Begin inline drm_release
*/
DRM_DEBUG( "pid = %d, device = 0x%lx, open_count = %d\n",
current->pid, (long)old_encode_dev(dev->device), dev->open_count );
if ( priv->lock_count && dev->lock.hw_lock &&
_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) &&
dev->lock.filp == filp ) {
DRM_DEBUG( "File %p released, freeing lock for context %d\n",
filp,
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock) );
if (dev->fn_tbl->release)
dev->fn_tbl->release(dev, filp);
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. */
}
else if ( dev->fn_tbl->release && priv->lock_count && 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.filp = filp;
dev->lock.lock_time = jiffies;
atomic_inc( &dev->counts[_DRM_STAT_LOCKS] );
break; /* Got lock */
}
/* Contention */
schedule();
if ( signal_pending( current ) ) {
retcode = -ERESTARTSYS;
break;
}
}
current->state = TASK_RUNNING;
remove_wait_queue( &dev->lock.lock_queue, &entry );
if( !retcode ) {
if (dev->fn_tbl->release)
dev->fn_tbl->release(dev, filp);
drm_lock_free( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT );
}
}
if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
{
dev->fn_tbl->reclaim_buffers(filp);
}
drm_fasync( -1, filp, 0 );
down( &dev->ctxlist_sem );
if ( !list_empty( &dev->ctxlist->head ) ) {
drm_ctx_list_t *pos, *n;
list_for_each_entry_safe( pos, n, &dev->ctxlist->head, head ) {
if ( pos->tag == priv &&
pos->handle != DRM_KERNEL_CONTEXT ) {
if (dev->fn_tbl->context_dtor)
dev->fn_tbl->context_dtor(dev, pos->handle);
drm_ctxbitmap_free( dev, pos->handle );
list_del( &pos->head );
drm_free( pos, sizeof(*pos), DRM_MEM_CTXLIST );
--dev->ctx_count;
}
}
}
up( &dev->ctxlist_sem );
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 );
if (dev->fn_tbl->free_filp_priv)
dev->fn_tbl->free_filp_priv( dev, priv );
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;
}
EXPORT_SYMBOL(drm_release);
/**
* Called whenever a process performs an ioctl on /dev/drm.
*
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg user argument.
* \return zero on success or negative number on failure.
*
* Looks up the ioctl function in the ::ioctls table, checking for root
* previleges if so required, and dispatches to the respective function.
*/
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;
unsigned int nr = DRM_IOCTL_NR(cmd);
int retcode = -EINVAL;
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)old_encode_dev(dev->device),
priv->authenticated );
if (nr < DRIVER_IOCTL_COUNT)
ioctl = &drm_ioctls[nr];
else if ((nr >= DRM_COMMAND_BASE) || (nr < DRM_COMMAND_BASE + dev->fn_tbl->num_ioctls))
ioctl = &dev->fn_tbl->ioctls[nr - DRM_COMMAND_BASE];
else
goto err_i1;
func = ioctl->func;
if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->fn_tbl->dma_ioctl) /* Local override? */
func = dev->fn_tbl->dma_ioctl;
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 );
}
err_i1:
atomic_dec( &dev->ioctl_count );
if (retcode) DRM_DEBUG( "ret = %x\n", retcode);
return retcode;
}
EXPORT_SYMBOL(drm_ioctl);
/**
* Lock ioctl.
*
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg user argument, pointing to a drm_lock structure.
* \return zero on success or negative number on failure.
*
* Add the current task to the lock wait queue, and attempt to take to lock.
*/
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;
++priv->lock_count;
if ( copy_from_user( &lock, (drm_lock_t __user *)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 (drm_core_check_feature(dev, DRIVER_DMA_QUEUE))
if ( lock.context < 0 )
return -EINVAL;
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.filp = filp;
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 );
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 (dev->fn_tbl->dma_ready && (lock.flags & _DRM_LOCK_READY))
dev->fn_tbl->dma_ready(dev);
if ( dev->fn_tbl->dma_quiescent && (lock.flags & _DRM_LOCK_QUIESCENT ))
return dev->fn_tbl->dma_quiescent(dev);
if ( dev->fn_tbl->kernel_context_switch && dev->last_context != lock.context ) {
dev->fn_tbl->kernel_context_switch(dev, dev->last_context,
lock.context);
}
DRM_DEBUG( "%d %s\n", lock.context, ret ? "interrupted" : "has lock" );
return ret;
}
/**
* Unlock ioctl.
*
* \param inode device inode.
* \param filp file pointer.
* \param cmd command.
* \param arg user argument, pointing to a drm_lock structure.
* \return zero on success or negative number on failure.
*
* Transfer and free the lock.
*/
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 __user *)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 (dev->fn_tbl->kernel_context_switch_unlock)
dev->fn_tbl->kernel_context_switch_unlock(dev);
else
{
drm_lock_transfer( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT );
if ( drm_lock_free( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT ) ) {
DRM_ERROR( "\n" );
}
}
unblock_all_signals();
return 0;
}
Reference in New Issue View Git Blame Copy Permalink