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drm/bsd-core/drm_drv.c

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/*-
* 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>
*
*/
/** @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 "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(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 kdev, 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(kdev), "drmsub"))
realdev = device_get_parent(kdev);
else
realdev = kdev;
vendor = pci_get_vendor(realdev);
device = pci_get_device(realdev);
#else
vendor = pci_get_vendor(kdev);
device = pci_get_device(kdev);
#endif
if (pci_get_class(kdev) != PCIC_DISPLAY
|| pci_get_subclass(kdev) != PCIS_DISPLAY_VGA)
return ENXIO;
id_entry = drm_find_description(vendor, device, idlist);
if (id_entry != NULL) {
if (!device_get_desc(kdev)) {
DRM_DEBUG("desc : %s\n", device_get_desc(kdev));
device_set_desc(kdev, id_entry->name);
}
return 0;
}
return ENXIO;
}
int drm_attach(device_t kdev, drm_pci_id_list_t *idlist)
{
struct drm_device *dev;
drm_pci_id_list_t *id_entry;
int unit, msicount;
unit = device_get_unit(kdev);
dev = device_get_softc(kdev);
#if __FreeBSD_version < 700010
if (!strcmp(device_get_name(kdev), "drmsub"))
dev->device = device_get_parent(kdev);
else
dev->device = kdev;
#else
dev->device = kdev;
#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 kdev)
{
struct drm_device *dev;
dev = device_get_softc(kdev);
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) ||
(idlist[i].device == 0))) {
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_LOCK();
drm_lastclose(dev);
DRM_UNLOCK();
drm_vblank_cleanup(dev);
/* 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, 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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