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NetBSD/sys/dev/drm/drm_drv.c

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/* $NetBSD: drm_drv.c,v 1.22 2009/01/31 13:49:29 bouyer Exp $ */
/* 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>
*
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: drm_drv.c,v 1.22 2009/01/31 13:49:29 bouyer Exp $");
/*
__FBSDID("$FreeBSD: src/sys/dev/drm/drm_drv.c,v 1.6 2006/09/07 23:04:47 anholt Exp $");
*/
#include <sys/module.h>
#include "drmP.h"
#include "drm.h"
#include "drm_sarea.h"
#ifdef DRM_DEBUG_DEFAULT_ON
int drm_debug_flag = 1;
#else
int drm_debug_flag = 0;
#endif
static int drm_load(drm_device_t *dev);
static void drm_unload(drm_device_t *dev);
static drm_pci_id_list_t *drm_find_description(int vendor, int device,
drm_pci_id_list_t *idlist);
#define DRIVER_SOFTC(unit) \
(((unit)<DRM_MAXUNITS) ? drm_units[(unit)] : NULL)
static drm_ioctl_desc_t drm_ioctls[256] = {
[DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { drm_version, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY},
[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = { drm_getmap, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = { drm_getclient, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = { drm_getstats, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)] = { drm_setversion, DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = { drm_rmmap_ioctl, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { drm_getsareactx, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { drm_addctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { drm_getctx, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { drm_resctx, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { drm_lock, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { drm_unlock, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_noop, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = { drm_addbufs_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = { drm_markbufs, DRM_AUTH|DRM_MASTER },
[DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = { drm_infobufs, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = { drm_mapbufs, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = { drm_freebufs, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_DMA)] = { drm_dma, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = { drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = { drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = { drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = { drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = { drm_agp_info_ioctl, DRM_AUTH },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = { drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = { drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = { drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = { drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = { drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = { drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = { drm_wait_vblank, 0 },
};
const struct cdevsw drm_cdevsw = {
drm_open,
drm_close,
drm_read,
nowrite,
drm_ioctl,
nostop,
notty,
drm_poll,
drm_mmap,
nokqfilter,
D_TTY
};
int drm_refcnt = 0;
drm_device_t *drm_units[DRM_MAXUNITS];
static int init_units = 1;
int drm_probe(struct pci_attach_args *pa, drm_pci_id_list_t *idlist);
void drm_attach(struct device *kdev, struct pci_attach_args *pa,
drm_pci_id_list_t *idlist);
int drm_probe(struct pci_attach_args *pa, drm_pci_id_list_t *idlist)
{
int unit;
drm_pci_id_list_t *id_entry;
/* first make sure there is place for the device */
for(unit=0; unit<DRM_MAXUNITS; unit++)
if(drm_units[unit] == NULL) break;
if(unit == DRM_MAXUNITS) return 0;
id_entry = drm_find_description(PCI_VENDOR(pa->pa_id),
PCI_PRODUCT(pa->pa_id), idlist);
if (id_entry != NULL) {
return 1;
}
return 0;
}
void drm_attach(struct device *kdev, struct pci_attach_args *pa,
drm_pci_id_list_t *idlist)
{
int unit;
drm_device_t *dev;
drm_pci_id_list_t *id_entry;
if(init_units)
{
for(unit=0; unit<DRM_MAXUNITS;unit++)
drm_units[unit] = NULL;
init_units = 0;
}
for(unit=0; unit<DRM_MAXUNITS; unit++)
if(drm_units[unit] == NULL) break;
/* This should not happen, since drm_probe made sure there was room */
if(unit == DRM_MAXUNITS) return;
dev = drm_units[unit] = device_private(kdev);
dev->device = kdev;
dev->unit = unit;
id_entry = drm_find_description(PCI_VENDOR(pa->pa_id),
PCI_PRODUCT(pa->pa_id), idlist);
dev->id_entry = id_entry;
dev->driver.id_entry = id_entry;
dev->unique = NULL;
dev->unique_len = 0;
dev->if_version = 0;
dev->flags = 0;
dev->open_count = 0;
dev->buf_use = 0;
dev->counters = 0;
/* dev->files : drm_load */
/* dev->magiclist : drm_firstopen */
/* dev->maplist : drm_load */
dev->context_sareas = NULL;
dev->max_context = 0;
mutex_init(&dev->dev_lock, MUTEX_DEFAULT, IPL_NONE);
dev->dma = NULL;
/* dev->irq : drm_load */
dev->irq_enabled = 0;
dev->pa = *pa;
dev->irqh = NULL;
for(unit=0; unit<DRM_MAX_PCI_RESOURCE; unit++)
{
dev->pci_map_data[unit].mapped = 0;
dev->pci_map_data[unit].maptype =
pci_mapreg_type(dev->pa.pa_pc, dev->pa.pa_tag,
PCI_MAPREG_START + unit*4);
if(pci_mapreg_info(dev->pa.pa_pc, dev->pa.pa_tag,
PCI_MAPREG_START + unit*4,
dev->pci_map_data[unit].maptype,
&(dev->pci_map_data[unit].base),
&(dev->pci_map_data[unit].size),
&(dev->pci_map_data[unit].flags)))
{
dev->pci_map_data[unit].base = 0;
dev->pci_map_data[unit].size = 0;
}
if(dev->pci_map_data[unit].maptype == PCI_MAPREG_TYPE_MEM)
dev->pci_map_data[unit].flags |= BUS_SPACE_MAP_LINEAR;
if(dev->pci_map_data[unit].maptype
== (PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT))
dev->pci_map_data[unit].flags |= BUS_SPACE_MAP_LINEAR;
}
for(unit=0; unit<DRM_MAX_PCI_RESOURCE; unit++) {
dev->agp_map_data[unit].mapped = 0;
dev->agp_map_data[unit].maptype = PCI_MAPREG_TYPE_MEM;
}
dev->context_flag = 0;
dev->last_context = 0;
dev->vbl_queue = 0;
dev->vbl_received = 0;
dev->buf_pgid = 0;
dev->sysctl = NULL;
dev->agp = NULL;
dev->sg = NULL;
dev->ctx_bitmap = NULL;
dev->dev_private = NULL;
dev->agp_buffer_token = 0;
dev->agp_buffer_map = 0;
/* dev->unit - already done */
aprint_naive("\n");
aprint_normal(": %s (unit %d)\n", id_entry->name, dev->unit);
drm_load(dev);
}
int drm_detach(struct device *self, int flags)
{
drm_device_t *dev = device_private(self);
/* XXX locking */
if (dev->open_count)
return EBUSY;
drm_unload(dev);
drm_units[dev->unit] = NULL;
return 0;
}
int drm_activate(struct device *self, enum devact act)
{
switch (act) {
case DVACT_ACTIVATE:
return (EOPNOTSUPP);
break;
case DVACT_DEACTIVATE:
/* FIXME */
break;
}
return (0);
}
drm_pci_id_list_t *drm_find_description(int vendor, int device,
drm_pci_id_list_t *idlist)
{
int i = 0;
for (i = 0; idlist[i].vendor != 0; i++) {
if ((idlist[i].vendor == vendor) &&
(idlist[i].device == device)) {
return &idlist[i];
}
}
return NULL;
}
static int drm_firstopen(drm_device_t *dev)
{
drm_local_map_t *map;
int i;
DRM_SPINLOCK_ASSERT(&dev->dev_lock);
/* prebuild the SAREA */
i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM,
_DRM_CONTAINS_LOCK, &map);
if (i != 0)
return i;
if (dev->driver.firstopen)
dev->driver.firstopen(dev);
dev->buf_use = 0;
if (dev->driver.use_dma) {
i = drm_dma_setup(dev);
if (i != 0)
return i;
}
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;
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->lock.lock_queue = 0;
dev->irq_enabled = 0;
dev->context_flag = 0;
dev->last_context = 0;
dev->if_version = 0;
dev->buf_pgid = 0;
DRM_DEBUG( "\n" );
return 0;
}
static int drm_lastclose(drm_device_t *dev)
{
drm_magic_entry_t *pt, *next;
drm_local_map_t *map;
struct drm_file *filep;
int i;
DRM_SPINLOCK_ASSERT(&dev->dev_lock);
DRM_DEBUG( "\n" );
if (dev->driver.lastclose != NULL)
dev->driver.lastclose(dev);
if (dev->irq_enabled)
drm_irq_uninstall(dev);
if ( dev->unique ) {
free(dev->unique, M_DRM);
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;
free(pt, M_DRM);
}
dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
}
/* 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
* drm_unload is called.
*/
for ( entry = dev->agp->memory ; entry ; entry = nexte ) {
nexte = entry->next;
if ( entry->bound )
drm_agp_unbind_memory(entry->handle);
drm_agp_free_memory(entry->handle);
free(entry, M_DRM);
}
dev->agp->memory = NULL;
if (dev->agp->acquired)
drm_agp_release(dev);
dev->agp->acquired = 0;
dev->agp->enabled = 0;
}
if (dev->sg != NULL) {
drm_sg_cleanup(dev->sg);
dev->sg = NULL;
}
while ((map = TAILQ_FIRST(&dev->maplist)) != NULL) {
drm_rmmap(dev, map);
}
for(i = 0; i<DRM_MAX_PCI_RESOURCE; i++) {
if (dev->pci_map_data[i].mapped > 1) {
bus_space_unmap(dev->pa.pa_memt,
dev->pci_map_data[i].bsh,
dev->pci_map_data[i].size);
dev->pci_map_data[i].mapped = 0;
DRM_DEBUG("WARNING: had to unmap resource %d\n", i);
}
}
drm_dma_takedown(dev);
DRM_DEBUG( "\n" );
if ( dev->lock.hw_lock ) {
dev->lock.hw_lock = NULL; /* SHM removed */
dev->lock.filp = NULL;
DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
}
while ((filep = TAILQ_FIRST(&dev->files)) != NULL) {
DRM_INFO("had to remove pid %d still in file list\n",
(int) filep->pid);
TAILQ_REMOVE(&dev->files, filep, link);
free(filep, M_DRM);
}
return 0;
}
static int drm_load(drm_device_t *dev)
{
int retcode;
DRM_DEBUG( "\n" );
dev->irq = dev->pa.pa_intrline;
dev->pci_domain = 0;
dev->pci_bus = dev->pa.pa_bus;
dev->pci_slot = dev->pa.pa_device;
dev->pci_func = dev->pa.pa_function;
dev->pci_vendor = PCI_VENDOR(dev->pa.pa_id);
dev->pci_device = PCI_PRODUCT(dev->pa.pa_id);
TAILQ_INIT(&dev->maplist);
drm_mem_init();
drm_sysctl_init(dev);
TAILQ_INIT(&dev->files);
if (dev->driver.load != NULL) {
DRM_LOCK();
retcode = dev->driver.load(dev, dev->id_entry->driver_private);
DRM_UNLOCK();
if (retcode != 0)
goto error;
}
if (dev->driver.use_agp) {
if (drm_device_is_agp(dev))
dev->agp = drm_agp_init(dev);
if (dev->driver.require_agp && dev->agp == NULL) {
DRM_ERROR("Card isn't AGP, or couldn't initialize "
"AGP.\n");
retcode = DRM_ERR(ENOMEM);
goto error;
}
#ifndef DRM_NO_MTRR
if (dev->agp != NULL) {
if (drm_mtrr_add(dev->agp->info.ai_aperture_base,
dev->agp->info.ai_aperture_size, DRM_MTRR_WC) == 0)
dev->agp->mtrr = 1;
}
#endif
}
retcode = drm_ctxbitmap_init(dev);
if (retcode != 0) {
DRM_ERROR("Cannot allocate memory for context bitmap.\n");
goto error;
}
aprint_normal_dev(dev->device, "Initialized %s %d.%d.%d %s\n",
dev->driver.name,
dev->driver.major,
dev->driver.minor,
dev->driver.patchlevel,
dev->driver.date);
return 0;
error:
drm_sysctl_cleanup(dev);
DRM_LOCK();
drm_lastclose(dev);
DRM_UNLOCK();
DRM_SPINUNINIT(&dev->dev_lock);
return retcode;
}
static void drm_unload(drm_device_t *dev)
{
int i;
DRM_DEBUG( "\n" );
drm_sysctl_cleanup(dev);
drm_ctxbitmap_cleanup(dev);
#if !defined(DRM_NO_MTRR) && !defined(DRM_NO_AGP)
if (dev->agp && dev->agp->mtrr) {
int __unused retcode;
retcode = drm_mtrr_del(0, dev->agp->info.ai_aperture_base,
dev->agp->info.ai_aperture_size, DRM_MTRR_WC);
DRM_DEBUG("mtrr_del = %d", retcode);
}
#endif
DRM_LOCK();
drm_lastclose(dev);
DRM_UNLOCK();
/* Clean up PCI resources allocated by drm_bufs.c. We're not really
* worried about resource consumption while the DRM is inactive (between
* lastclose and firstopen or unload) because these aren't actually
* taking up KVA, just keeping the PCI resource allocated.
*/
i = 0;
for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++)
if (dev->pci_map_data[i].mapped != 0)
{
bus_space_unmap(dev->pa.pa_memt,
dev->pci_map_data[i].bsh,
dev->pci_map_data[i].size);
dev->pci_map_data[i].mapped = 0;
}
if ( dev->agp ) {
free(dev->agp, M_DRM);
dev->agp = NULL;
}
if (dev->driver.unload != NULL)
dev->driver.unload(dev);
drm_mem_uninit();
DRM_SPINUNINIT(&dev->dev_lock);
}
int drm_version(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_version_t drmversion;
int len;
DRM_COPY_FROM_USER_IOCTL( drmversion, (drm_version_t *)data, sizeof(drmversion) );
#define DRM_COPY( name, value ) \
len = strlen( value ); \
if ( len > name##_len ) len = name##_len; \
name##_len = strlen( value ); \
if ( len && name ) { \
if ( DRM_COPY_TO_USER( name, value, len ) ) \
return DRM_ERR(EFAULT); \
}
drmversion.version_major = dev->driver.major;
drmversion.version_minor = dev->driver.minor;
drmversion.version_patchlevel = dev->driver.patchlevel;
DRM_COPY(drmversion.name, dev->driver.name);
DRM_COPY(drmversion.date, dev->driver.date);
DRM_COPY(drmversion.desc, dev->driver.desc);
DRM_COPY_TO_USER_IOCTL( (drm_version_t *)data, drmversion, sizeof(drmversion) );
return 0;
}
int drm_open(DRM_CDEV kdev, int flags, int fmt, DRM_STRUCTCDEVPROC *p)
{
drm_device_t *dev = NULL;
int retcode = 0;
dev = DRIVER_SOFTC(minor(kdev));
DRM_DEBUG( "open_count = %d\n", dev->open_count );
retcode = drm_open_helper(kdev, flags, fmt, p->l_proc, dev);
if ( !retcode ) {
atomic_inc( &dev->counts[_DRM_STAT_OPENS] );
DRM_LOCK();
if ( !dev->open_count++ )
retcode = drm_firstopen(dev);
DRM_UNLOCK();
}
return retcode;
}
int drm_close_pid(drm_device_t *dev, drm_file_t *priv, pid_t pid)
{
int retcode = 0;
DRMFILE filp = (void *)(uintptr_t)(pid);
if (dev->driver.preclose != NULL)
dev->driver.preclose(dev, filp);
/* ========================================================
* Begin inline drm_release
*/
DRM_DEBUG( "pid = %d, device = 0x%lx, open_count = %d\n",
DRM_CURRENTPID, (long)dev->device, dev->open_count);
if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
&& dev->lock.filp == filp) {
DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
DRM_CURRENTPID,
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
if (dev->driver.reclaim_buffers_locked != NULL)
dev->driver.reclaim_buffers_locked(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->driver.reclaim_buffers_locked != NULL &&
dev->lock.hw_lock != NULL) {
/* The lock is required to reclaim buffers */
for (;;) {
if ( !dev->lock.hw_lock ) {
/* Device has been unregistered */
retcode = DRM_ERR(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 */
retcode = mtsleep((void *)&dev->lock.lock_queue,
PZERO | PCATCH, "drmlk2", 0, &dev->dev_lock);
if (retcode)
break;
}
if (retcode == 0) {
dev->driver.reclaim_buffers_locked(dev, filp);
drm_lock_free(dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT);
}
}
if (dev->driver.use_dma && !dev->driver.reclaim_buffers_locked)
drm_reclaim_buffers(dev, filp);
if (--priv->refs == 0) {
if (dev->driver.postclose != NULL)
dev->driver.postclose(dev, priv);
TAILQ_REMOVE(&dev->files, priv, link);
free(priv, M_DRM);
}
return retcode;
}
int drm_close(DRM_CDEV kdev, int flags, int fmt, DRM_STRUCTCDEVPROC *p)
{
drm_file_t *priv;
DRM_DEVICE;
int retcode = 0;
DRM_DEBUG( "open_count = %d\n", dev->open_count );
DRM_LOCK();
priv = drm_find_file_by_proc(dev, p->l_proc);
if (!priv) {
DRM_UNLOCK();
DRM_ERROR("can't find authenticator\n");
return EINVAL;
}
/* On NetBSD, close will only be called once (?) */
DRM_DEBUG("setting priv->refs %d to 1\n", (int)priv->refs);
priv->refs = 1;
DRM_DEBUG("setting open_count %d to 1\n", (int)dev->open_count);
dev->open_count = 1;
retcode = drm_close_pid(dev, priv, DRM_CURRENTPID);
dev->buf_pgid = 0;
atomic_inc( &dev->counts[_DRM_STAT_CLOSES] );
if (--dev->open_count == 0) {
retcode = drm_lastclose(dev);
}
DRM_UNLOCK();
return retcode;
}
/* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
*/
int drm_ioctl(DRM_CDEV kdev, u_long cmd, void *data, int flags,
DRM_STRUCTCDEVPROC *p)
{
DRM_DEVICE;
int retcode = 0;
drm_ioctl_desc_t *ioctl;
int (*func)(DRM_IOCTL_ARGS);
int nr = DRM_IOCTL_NR(cmd);
int is_driver_ioctl = 0;
drm_file_t *priv;
DRMFILE filp = (DRMFILE)(uintptr_t)DRM_CURRENTPID;
DRM_LOCK();
priv = drm_find_file_by_proc(dev, p->l_proc);
DRM_UNLOCK();
if (priv == NULL) {
DRM_ERROR("can't find authenticator\n");
return EINVAL;
}
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_CURRENTPID, cmd, nr, (long)dev->device, priv->authenticated );
switch (cmd) {
case FIONBIO:
case FIOASYNC:
return 0;
case SIOCSPGRP:
case TIOCSPGRP:
case FIOSETOWN:
return fsetown(&dev->buf_pgid, cmd, data);
case SIOCGPGRP:
case TIOCGPGRP:
case FIOGETOWN:
return fgetown(dev->buf_pgid, cmd, data);
}
if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
return EINVAL;
}
ioctl = &drm_ioctls[nr];
/* It's not a core DRM ioctl, try driver-specific. */
if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
/* The array entries begin at DRM_COMMAND_BASE ioctl nr */
nr -= DRM_COMMAND_BASE;
if (nr > dev->driver.max_ioctl) {
DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
nr, dev->driver.max_ioctl);
return EINVAL;
}
ioctl = &dev->driver.ioctls[nr];
is_driver_ioctl = 1;
}
func = ioctl->func;
if (func == NULL) {
DRM_DEBUG( "no function\n" );
return EINVAL;
}
/* ioctl->master check should be against something in the filp set up
* for the first opener, but it doesn't matter yet.
*/
if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p->l_proc)) ||
((ioctl->flags & DRM_AUTH) && !priv->authenticated) ||
((ioctl->flags & DRM_MASTER) && !priv->master))
return EACCES;
if (is_driver_ioctl)
DRM_LOCK();
retcode = func(kdev, cmd, data, flags, p, filp);
if (is_driver_ioctl)
DRM_UNLOCK();
if (retcode != 0)
DRM_DEBUG(" returning %d\n", retcode);
return DRM_ERR(retcode);
}
MODULE(MODULE_CLASS_MISC, drm, NULL);
static int
drm_modcmd(modcmd_t cmd, void *arg)
{
#ifdef _MODULE
devmajor_t bmajor = NODEVMAJOR, cmajor = NODEVMAJOR;
switch (cmd) {
case MODULE_CMD_INIT:
return devsw_attach("drm", NULL, &bmajor, &drm_cdevsw, &cmajor);
case MODULE_CMD_FINI:
devsw_detach(NULL, &drm_cdevsw);
return 0;
default:
return ENOTTY;
}
#else
if (cmd == MODULE_CMD_INIT)
return 0;
return ENOTTY;
#endif
}
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