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freebsd-dev/sys/dev/drm/drm_drv.c
Robert Noland 51e39089c9 Initialize the vblank structures at load time. Previously we did this 
at irq install/uninstall time, but when we vt switch, we uninstall the
irq handler.  When the irq handler is reinstalled, the modeset ioctl
happens first.  The modeset ioctl is supposed to tell us that we can
disable vblank interrupts if there are no active consumers.  This will
fail after a vt switch until another modeset ioctl is called via dpms
or xrandr.  Leading to cases where either interrupts are on and can't
be disabled, or worse, no interrupts at all.

MFC after:	2 weeks
2009-02-28 02:37:55 +00:00

839 lines
22 KiB
C
Raw Blame History

/*-
* 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>
__FBSDID("$FreeBSD$");
/** @file drm_drv.c
* The catch-all file for DRM device support, including module setup/teardown,
* open/close, and ioctl dispatch.
*/
#include <sys/limits.h>
#include "dev/drm/drmP.h"
#include "dev/drm/drm.h"
#include "dev/drm/drm_sarea.h"
#ifdef DRM_DEBUG_DEFAULT_ON
int drm_debug_flag = 1;
#else
int drm_debug_flag = 0;
#endif
static int drm_load(struct drm_device *dev);
static void drm_unload(struct drm_device *dev);
static drm_pci_id_list_t *drm_find_description(int vendor, int device,
drm_pci_id_list_t *idlist);
#define DRIVER_SOFTC(unit) \
((struct drm_device *)devclass_get_softc(drm_devclass, unit))
MODULE_VERSION(drm, 1);
MODULE_DEPEND(drm, agp, 1, 1, 1);
MODULE_DEPEND(drm, pci, 1, 1, 1);
MODULE_DEPEND(drm, mem, 1, 1, 1);
static drm_ioctl_desc_t drm_ioctls[256] = {
DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0),
DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0),
DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0),
DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_draw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
};
static struct cdevsw drm_cdevsw = {
.d_version = D_VERSION,
.d_open = drm_open,
.d_read = drm_read,
.d_ioctl = drm_ioctl,
.d_poll = drm_poll,
.d_mmap = drm_mmap,
.d_name = "drm",
.d_flags = D_TRACKCLOSE
};
int drm_msi = 1; /* Enable by default. */
TUNABLE_INT("hw.drm.msi", &drm_msi);
static struct drm_msi_blacklist_entry drm_msi_blacklist[] = {
{0x8086, 0x2772}, /* Intel i945G */ \
{0x8086, 0x27A2}, /* Intel i945GM */ \
{0x8086, 0x27AE}, /* Intel i945GME */ \
{0, 0}
};
static int drm_msi_is_blacklisted(int vendor, int device)
{
int i = 0;
for (i = 0; drm_msi_blacklist[i].vendor != 0; i++) {
if ((drm_msi_blacklist[i].vendor == vendor) &&
(drm_msi_blacklist[i].device == device)) {
return 1;
}
}
return 0;
}
int drm_probe(device_t dev, drm_pci_id_list_t *idlist)
{
drm_pci_id_list_t *id_entry;
int vendor, device;
#if __FreeBSD_version < 700010
device_t realdev;
if (!strcmp(device_get_name(dev), "drmsub"))
realdev = device_get_parent(dev);
else
realdev = dev;
vendor = pci_get_vendor(realdev);
device = pci_get_device(realdev);
#else
vendor = pci_get_vendor(dev);
device = pci_get_device(dev);
#endif
if (pci_get_class(dev) != PCIC_DISPLAY
|| pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
return ENXIO;
id_entry = drm_find_description(vendor, device, idlist);
if (id_entry != NULL) {
device_set_desc(dev, id_entry->name);
return 0;
}
return ENXIO;
}
int drm_attach(device_t nbdev, drm_pci_id_list_t *idlist)
{
struct drm_device *dev;
drm_pci_id_list_t *id_entry;
int unit, msicount;
unit = device_get_unit(nbdev);
dev = device_get_softc(nbdev);
#if __FreeBSD_version < 700010
if (!strcmp(device_get_name(nbdev), "drmsub"))
dev->device = device_get_parent(nbdev);
else
dev->device = nbdev;
#else
dev->device = nbdev;
#endif
dev->devnode = make_dev(&drm_cdevsw,
unit,
DRM_DEV_UID,
DRM_DEV_GID,
DRM_DEV_MODE,
"dri/card%d", unit);
#if __FreeBSD_version >= 700053
dev->pci_domain = pci_get_domain(dev->device);
#else
dev->pci_domain = 0;
#endif
dev->pci_bus = pci_get_bus(dev->device);
dev->pci_slot = pci_get_slot(dev->device);
dev->pci_func = pci_get_function(dev->device);
dev->pci_vendor = pci_get_vendor(dev->device);
dev->pci_device = pci_get_device(dev->device);
if (drm_msi &&
!drm_msi_is_blacklisted(dev->pci_vendor, dev->pci_device)) {
msicount = pci_msi_count(dev->device);
DRM_DEBUG("MSI count = %d\n", msicount);
if (msicount > 1)
msicount = 1;
if (pci_alloc_msi(dev->device, &msicount) == 0) {
DRM_INFO("MSI enabled %d message(s)\n", msicount);
dev->msi_enabled = 1;
dev->irqrid = 1;
}
}
dev->irqr = bus_alloc_resource_any(dev->device, SYS_RES_IRQ,
&dev->irqrid, RF_SHAREABLE);
if (!dev->irqr) {
return ENOENT;
}
dev->irq = (int) rman_get_start(dev->irqr);
mtx_init(&dev->dev_lock, "drmdev", NULL, MTX_DEF);
mtx_init(&dev->irq_lock, "drmirq", NULL, MTX_DEF);
mtx_init(&dev->vbl_lock, "drmvbl", NULL, MTX_DEF);
mtx_init(&dev->drw_lock, "drmdrw", NULL, MTX_DEF);
id_entry = drm_find_description(dev->pci_vendor,
dev->pci_device, idlist);
dev->id_entry = id_entry;
return drm_load(dev);
}
int drm_detach(device_t nbdev)
{
struct drm_device *dev;
dev = device_get_softc(nbdev);
drm_unload(dev);
bus_release_resource(dev->device, SYS_RES_IRQ, dev->irqrid, dev->irqr);
if (dev->msi_enabled) {
pci_release_msi(dev->device);
DRM_INFO("MSI released\n");
}
return 0;
}
#ifndef DRM_DEV_NAME
#define DRM_DEV_NAME "drm"
#endif
devclass_t drm_devclass;
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(struct drm_device *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 (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
i = drm_dma_setup(dev);
if (i != 0)
return i;
}
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_sigio = NULL;
DRM_DEBUG("\n");
return 0;
}
static int drm_lastclose(struct drm_device *dev)
{
drm_magic_entry_t *pt, *next;
drm_local_map_t *map, *mapsave;
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, 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;
free(pt, DRM_MEM_MAGIC);
}
dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
}
DRM_UNLOCK();
drm_drawable_free_all(dev);
DRM_LOCK();
/* 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, DRM_MEM_AGPLISTS);
}
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;
}
TAILQ_FOREACH_SAFE(map, &dev->maplist, link, mapsave) {
if (!(map->flags & _DRM_DRIVER))
drm_rmmap(dev, map);
}
drm_dma_takedown(dev);
if (dev->lock.hw_lock) {
dev->lock.hw_lock = NULL; /* SHM removed */
dev->lock.file_priv = NULL;
DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
}
return 0;
}
static int drm_load(struct drm_device *dev)
{
int i, retcode;
DRM_DEBUG("\n");
TAILQ_INIT(&dev->maplist);
drm_mem_init();
drm_sysctl_init(dev);
TAILQ_INIT(&dev->files);
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);
if (dev->driver->load != NULL) {
DRM_LOCK();
/* Shared code returns -errno. */
retcode = -dev->driver->load(dev,
dev->id_entry->driver_private);
if (pci_enable_busmaster(dev->device))
DRM_ERROR("Request to enable bus-master failed.\n");
DRM_UNLOCK();
if (retcode != 0)
goto error;
}
if (drm_core_has_AGP(dev)) {
if (drm_device_is_agp(dev))
dev->agp = drm_agp_init();
if (drm_core_check_feature(dev, DRIVER_REQUIRE_AGP) &&
dev->agp == NULL) {
DRM_ERROR("Card isn't AGP, or couldn't initialize "
"AGP.\n");
retcode = ENOMEM;
goto error;
}
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;
}
}
retcode = drm_ctxbitmap_init(dev);
if (retcode != 0) {
DRM_ERROR("Cannot allocate memory for context bitmap.\n");
goto error;
}
dev->drw_unrhdr = new_unrhdr(1, INT_MAX, NULL);
if (dev->drw_unrhdr == NULL) {
DRM_ERROR("Couldn't allocate drawable number allocator\n");
goto error;
}
DRM_INFO("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();
destroy_dev(dev->devnode);
mtx_destroy(&dev->drw_lock);
mtx_destroy(&dev->vbl_lock);
mtx_destroy(&dev->irq_lock);
mtx_destroy(&dev->dev_lock);
return retcode;
}
static void drm_unload(struct drm_device *dev)
{
int i;
DRM_DEBUG("\n");
drm_sysctl_cleanup(dev);
destroy_dev(dev->devnode);
drm_ctxbitmap_cleanup(dev);
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);
}
drm_vblank_cleanup(dev);
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.
*/
for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
if (dev->pcir[i] == NULL)
continue;
bus_release_resource(dev->device, SYS_RES_MEMORY,
dev->pcirid[i], dev->pcir[i]);
dev->pcir[i] = NULL;
}
if (dev->agp) {
free(dev->agp, DRM_MEM_AGPLISTS);
dev->agp = NULL;
}
if (dev->driver->unload != NULL) {
DRM_LOCK();
dev->driver->unload(dev);
DRM_UNLOCK();
}
delete_unrhdr(dev->drw_unrhdr);
drm_mem_uninit();
if (pci_disable_busmaster(dev->device))
DRM_ERROR("Request to disable bus-master failed.\n");
mtx_destroy(&dev->drw_lock);
mtx_destroy(&dev->vbl_lock);
mtx_destroy(&dev->irq_lock);
mtx_destroy(&dev->dev_lock);
}
int drm_version(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct drm_version *version = data;
int len;
#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 EFAULT; \
}
version->version_major = dev->driver->major;
version->version_minor = dev->driver->minor;
version->version_patchlevel = dev->driver->patchlevel;
DRM_COPY(version->name, dev->driver->name);
DRM_COPY(version->date, dev->driver->date);
DRM_COPY(version->desc, dev->driver->desc);
return 0;
}
int drm_open(struct cdev *kdev, int flags, int fmt, DRM_STRUCTPROC *p)
{
struct drm_device *dev = NULL;
int retcode = 0;
dev = DRIVER_SOFTC(dev2unit(kdev));
DRM_DEBUG("open_count = %d\n", dev->open_count);
retcode = drm_open_helper(kdev, flags, fmt, p, dev);
if (!retcode) {
atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
DRM_LOCK();
device_busy(dev->device);
if (!dev->open_count++)
retcode = drm_firstopen(dev);
DRM_UNLOCK();
}
return retcode;
}
void drm_close(void *data)
{
struct drm_file *file_priv = data;
struct drm_device *dev = file_priv->dev;
int retcode = 0;
DRM_DEBUG("open_count = %d\n", dev->open_count);
DRM_LOCK();
if (dev->driver->preclose != NULL)
dev->driver->preclose(dev, file_priv);
/* ========================================================
* 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.file_priv == file_priv) {
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, file_priv);
drm_lock_free(&dev->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 = EINTR;
break;
}
if (drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT)) {
dev->lock.file_priv = file_priv;
dev->lock.lock_time = jiffies;
atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
break; /* Got lock */
}
/* Contention */
retcode = mtx_sleep((void *)&dev->lock.lock_queue,
&dev->dev_lock, PZERO | PCATCH, "drmlk2", 0);
if (retcode)
break;
}
if (retcode == 0) {
dev->driver->reclaim_buffers_locked(dev, file_priv);
drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
}
}
if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
!dev->driver->reclaim_buffers_locked)
drm_reclaim_buffers(dev, file_priv);
funsetown(&dev->buf_sigio);
if (dev->driver->postclose != NULL)
dev->driver->postclose(dev, file_priv);
TAILQ_REMOVE(&dev->files, file_priv, link);
free(file_priv, DRM_MEM_FILES);
/* ========================================================
* End inline drm_release
*/
atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
device_unbusy(dev->device);
if (--dev->open_count == 0) {
retcode = drm_lastclose(dev);
}
DRM_UNLOCK();
}
/* drm_ioctl is called whenever a process performs an ioctl on /dev/drm.
*/
int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
DRM_STRUCTPROC *p)
{
struct drm_device *dev = drm_get_device_from_kdev(kdev);
int retcode = 0;
drm_ioctl_desc_t *ioctl;
int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
int nr = DRM_IOCTL_NR(cmd);
int is_driver_ioctl = 0;
struct drm_file *file_priv;
retcode = devfs_get_cdevpriv((void **)&file_priv);
if (retcode != 0) {
DRM_ERROR("can't find authenticator\n");
return EINVAL;
}
atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
++file_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,
file_priv->authenticated);
switch (cmd) {
case FIONBIO:
case FIOASYNC:
return 0;
case FIOSETOWN:
return fsetown(*(int *)data, &dev->buf_sigio);
case FIOGETOWN:
*(int *) data = fgetown(&dev->buf_sigio);
return 0;
}
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;
}
if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
((ioctl->flags & DRM_MASTER) && !file_priv->master))
return EACCES;
if (is_driver_ioctl) {
DRM_LOCK();
/* shared code returns -errno */
retcode = -func(dev, data, file_priv);
DRM_UNLOCK();
} else {
retcode = func(dev, data, file_priv);
}
if (retcode != 0)
DRM_DEBUG(" returning %d\n", retcode);
return retcode;
}
drm_local_map_t *drm_getsarea(struct drm_device *dev)
{
drm_local_map_t *map;
DRM_SPINLOCK_ASSERT(&dev->dev_lock);
TAILQ_FOREACH(map, &dev->maplist, link) {
if (map->type == _DRM_SHM && (map->flags & _DRM_CONTAINS_LOCK))
return map;
}
return NULL;
}
#if DRM_LINUX
#include <sys/sysproto.h>
MODULE_DEPEND(DRIVER_NAME, linux, 1, 1, 1);
#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);
/* The bits for in/out are switched on Linux */
#define LINUX_IOC_IN IOC_OUT
#define LINUX_IOC_OUT IOC_IN
static int
drm_linux_ioctl(DRM_STRUCTPROC *p, struct linux_ioctl_args* args)
{
int error;
int cmd = args->cmd;
args->cmd &= ~(LINUX_IOC_IN | LINUX_IOC_OUT);
if (cmd & LINUX_IOC_IN)
args->cmd |= IOC_IN;
if (cmd & LINUX_IOC_OUT)
args->cmd |= IOC_OUT;
error = ioctl(p, (struct ioctl_args *)args);
return error;
}
#endif /* DRM_LINUX */
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