drm/linux-core/drm_fence.c

848 lines
22 KiB
C

/**************************************************************************
*
* Copyright (c) 2006-2007 Tungsten Graphics, Inc., Cedar Park, TX., USA
* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS 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: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#include "drmP.h"
/*
* Typically called by the IRQ handler.
*/
void drm_fence_handler(struct drm_device *dev, uint32_t fence_class,
uint32_t sequence, uint32_t type, uint32_t error)
{
int wake = 0;
uint32_t diff;
uint32_t relevant;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_class_manager *fc = &fm->fence_class[fence_class];
struct drm_fence_driver *driver = dev->driver->fence_driver;
struct list_head *head;
struct drm_fence_object *fence, *next;
int found = 0;
int is_exe = (type & DRM_FENCE_TYPE_EXE);
int ge_last_exe;
diff = (sequence - fc->exe_flush_sequence) & driver->sequence_mask;
if (fc->pending_exe_flush && is_exe && diff < driver->wrap_diff)
fc->pending_exe_flush = 0;
diff = (sequence - fc->last_exe_flush) & driver->sequence_mask;
ge_last_exe = diff < driver->wrap_diff;
if (is_exe && ge_last_exe)
fc->last_exe_flush = sequence;
if (list_empty(&fc->ring))
return;
list_for_each_entry(fence, &fc->ring, ring) {
diff = (sequence - fence->sequence) & driver->sequence_mask;
if (diff > driver->wrap_diff) {
found = 1;
break;
}
}
fc->pending_flush &= ~type;
head = (found) ? &fence->ring : &fc->ring;
list_for_each_entry_safe_reverse(fence, next, head, ring) {
if (&fence->ring == &fc->ring)
break;
if (error) {
fence->error = error;
fence->signaled = fence->type;
fence->submitted_flush = fence->type;
fence->flush_mask = fence->type;
list_del_init(&fence->ring);
wake = 1;
break;
}
if (is_exe)
type |= fence->native_type;
relevant = type & fence->type;
if ((fence->signaled | relevant) != fence->signaled) {
fence->signaled |= relevant;
fence->flush_mask |= relevant;
fence->submitted_flush |= relevant;
DRM_DEBUG("Fence 0x%08lx signaled 0x%08x\n",
fence->base.hash.key, fence->signaled);
wake = 1;
}
relevant = fence->flush_mask &
~(fence->submitted_flush | fence->signaled);
fc->pending_flush |= relevant;
fence->submitted_flush |= relevant;
if (!(fence->type & ~fence->signaled)) {
DRM_DEBUG("Fence completely signaled 0x%08lx\n",
fence->base.hash.key);
list_del_init(&fence->ring);
}
}
/*
* Reinstate lost flush flags.
*/
if ((fc->pending_flush & type) != type) {
head = head->prev;
list_for_each_entry(fence, head, ring) {
if (&fence->ring == &fc->ring)
break;
diff = (fc->last_exe_flush - fence->sequence) &
driver->sequence_mask;
if (diff > driver->wrap_diff)
break;
relevant = fence->submitted_flush & ~fence->signaled;
fc->pending_flush |= relevant;
}
}
if (wake) {
DRM_WAKEUP(&fc->fence_queue);
}
}
EXPORT_SYMBOL(drm_fence_handler);
static void drm_fence_unring(struct drm_device *dev, struct list_head *ring)
{
struct drm_fence_manager *fm = &dev->fm;
unsigned long flags;
write_lock_irqsave(&fm->lock, flags);
list_del_init(ring);
write_unlock_irqrestore(&fm->lock, flags);
}
void drm_fence_usage_deref_locked(struct drm_fence_object **fence)
{
struct drm_fence_object *tmp_fence = *fence;
struct drm_device *dev = tmp_fence->dev;
struct drm_fence_manager *fm = &dev->fm;
DRM_ASSERT_LOCKED(&dev->struct_mutex);
*fence = NULL;
if (atomic_dec_and_test(&tmp_fence->usage)) {
drm_fence_unring(dev, &tmp_fence->ring);
DRM_DEBUG("Destroyed a fence object 0x%08lx\n",
tmp_fence->base.hash.key);
atomic_dec(&fm->count);
BUG_ON(!list_empty(&tmp_fence->base.list));
drm_ctl_free(tmp_fence, sizeof(*tmp_fence), DRM_MEM_FENCE);
}
}
EXPORT_SYMBOL(drm_fence_usage_deref_locked);
void drm_fence_usage_deref_unlocked(struct drm_fence_object **fence)
{
struct drm_fence_object *tmp_fence = *fence;
struct drm_device *dev = tmp_fence->dev;
struct drm_fence_manager *fm = &dev->fm;
*fence = NULL;
if (atomic_dec_and_test(&tmp_fence->usage)) {
mutex_lock(&dev->struct_mutex);
if (atomic_read(&tmp_fence->usage) == 0) {
drm_fence_unring(dev, &tmp_fence->ring);
atomic_dec(&fm->count);
BUG_ON(!list_empty(&tmp_fence->base.list));
drm_ctl_free(tmp_fence, sizeof(*tmp_fence), DRM_MEM_FENCE);
}
mutex_unlock(&dev->struct_mutex);
}
}
EXPORT_SYMBOL(drm_fence_usage_deref_unlocked);
struct drm_fence_object
*drm_fence_reference_locked(struct drm_fence_object *src)
{
DRM_ASSERT_LOCKED(&src->dev->struct_mutex);
atomic_inc(&src->usage);
return src;
}
void drm_fence_reference_unlocked(struct drm_fence_object **dst,
struct drm_fence_object *src)
{
mutex_lock(&src->dev->struct_mutex);
*dst = src;
atomic_inc(&src->usage);
mutex_unlock(&src->dev->struct_mutex);
}
EXPORT_SYMBOL(drm_fence_reference_unlocked);
static void drm_fence_object_destroy(struct drm_file *priv,
struct drm_user_object *base)
{
struct drm_fence_object *fence =
drm_user_object_entry(base, struct drm_fence_object, base);
drm_fence_usage_deref_locked(&fence);
}
int drm_fence_object_signaled(struct drm_fence_object *fence,
uint32_t mask, int poke_flush)
{
unsigned long flags;
int signaled;
struct drm_device *dev = fence->dev;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_driver *driver = dev->driver->fence_driver;
if (poke_flush)
driver->poke_flush(dev, fence->fence_class);
read_lock_irqsave(&fm->lock, flags);
signaled =
(fence->type & mask & fence->signaled) == (fence->type & mask);
read_unlock_irqrestore(&fm->lock, flags);
return signaled;
}
EXPORT_SYMBOL(drm_fence_object_signaled);
static void drm_fence_flush_exe(struct drm_fence_class_manager *fc,
struct drm_fence_driver *driver,
uint32_t sequence)
{
uint32_t diff;
if (!fc->pending_exe_flush) {
fc->exe_flush_sequence = sequence;
fc->pending_exe_flush = 1;
} else {
diff = (sequence - fc->exe_flush_sequence) & driver->sequence_mask;
if (diff < driver->wrap_diff)
fc->exe_flush_sequence = sequence;
}
}
int drm_fence_object_flush(struct drm_fence_object *fence,
uint32_t type)
{
struct drm_device *dev = fence->dev;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_class_manager *fc = &fm->fence_class[fence->fence_class];
struct drm_fence_driver *driver = dev->driver->fence_driver;
unsigned long flags;
if (type & ~fence->type) {
DRM_ERROR("Flush trying to extend fence type, "
"0x%x, 0x%x\n", type, fence->type);
return -EINVAL;
}
write_lock_irqsave(&fm->lock, flags);
fence->flush_mask |= type;
if ((fence->submitted_flush & fence->signaled)
== fence->submitted_flush) {
if ((fence->type & DRM_FENCE_TYPE_EXE) &&
!(fence->submitted_flush & DRM_FENCE_TYPE_EXE)) {
drm_fence_flush_exe(fc, driver, fence->sequence);
fence->submitted_flush |= DRM_FENCE_TYPE_EXE;
} else {
fc->pending_flush |= (fence->flush_mask &
~fence->submitted_flush);
fence->submitted_flush = fence->flush_mask;
}
}
write_unlock_irqrestore(&fm->lock, flags);
driver->poke_flush(dev, fence->fence_class);
return 0;
}
/*
* Make sure old fence objects are signaled before their fence sequences are
* wrapped around and reused.
*/
void drm_fence_flush_old(struct drm_device *dev, uint32_t fence_class,
uint32_t sequence)
{
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_class_manager *fc = &fm->fence_class[fence_class];
struct drm_fence_driver *driver = dev->driver->fence_driver;
uint32_t old_sequence;
unsigned long flags;
struct drm_fence_object *fence;
uint32_t diff;
write_lock_irqsave(&fm->lock, flags);
old_sequence = (sequence - driver->flush_diff) & driver->sequence_mask;
diff = (old_sequence - fc->last_exe_flush) & driver->sequence_mask;
if ((diff < driver->wrap_diff) && !fc->pending_exe_flush) {
fc->pending_exe_flush = 1;
fc->exe_flush_sequence = sequence - (driver->flush_diff / 2);
}
write_unlock_irqrestore(&fm->lock, flags);
mutex_lock(&dev->struct_mutex);
read_lock_irqsave(&fm->lock, flags);
if (list_empty(&fc->ring)) {
read_unlock_irqrestore(&fm->lock, flags);
mutex_unlock(&dev->struct_mutex);
return;
}
fence = drm_fence_reference_locked(list_entry(fc->ring.next, struct drm_fence_object, ring));
mutex_unlock(&dev->struct_mutex);
diff = (old_sequence - fence->sequence) & driver->sequence_mask;
read_unlock_irqrestore(&fm->lock, flags);
if (diff < driver->wrap_diff)
drm_fence_object_flush(fence, fence->type);
drm_fence_usage_deref_unlocked(&fence);
}
EXPORT_SYMBOL(drm_fence_flush_old);
static int drm_fence_lazy_wait(struct drm_fence_object *fence,
int ignore_signals,
uint32_t mask)
{
struct drm_device *dev = fence->dev;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_class_manager *fc = &fm->fence_class[fence->fence_class];
int signaled;
unsigned long _end = jiffies + 3*DRM_HZ;
int ret = 0;
do {
DRM_WAIT_ON(ret, fc->fence_queue, 3 * DRM_HZ,
(signaled = drm_fence_object_signaled(fence, mask, 1)));
if (signaled)
return 0;
if (time_after_eq(jiffies, _end))
break;
} while (ret == -EINTR && ignore_signals);
if (drm_fence_object_signaled(fence, mask, 0))
return 0;
if (time_after_eq(jiffies, _end))
ret = -EBUSY;
if (ret) {
if (ret == -EBUSY) {
DRM_ERROR("Fence timeout. "
"GPU lockup or fence driver was "
"taken down. %d 0x%08x 0x%02x 0x%02x 0x%02x\n",
fence->fence_class,
fence->sequence,
fence->type,
mask,
fence->signaled);
DRM_ERROR("Pending exe flush %d 0x%08x\n",
fc->pending_exe_flush,
fc->exe_flush_sequence);
}
return ((ret == -EINTR) ? -EAGAIN : ret);
}
return 0;
}
int drm_fence_object_wait(struct drm_fence_object *fence,
int lazy, int ignore_signals, uint32_t mask)
{
struct drm_device *dev = fence->dev;
struct drm_fence_driver *driver = dev->driver->fence_driver;
int ret = 0;
unsigned long _end;
int signaled;
if (mask & ~fence->type) {
DRM_ERROR("Wait trying to extend fence type"
" 0x%08x 0x%08x\n", mask, fence->type);
BUG();
return -EINVAL;
}
if (drm_fence_object_signaled(fence, mask, 0))
return 0;
_end = jiffies + 3 * DRM_HZ;
drm_fence_object_flush(fence, mask);
if (lazy && driver->lazy_capable) {
ret = drm_fence_lazy_wait(fence, ignore_signals, mask);
if (ret)
return ret;
} else {
if (driver->has_irq(dev, fence->fence_class,
DRM_FENCE_TYPE_EXE)) {
ret = drm_fence_lazy_wait(fence, ignore_signals,
DRM_FENCE_TYPE_EXE);
if (ret)
return ret;
}
if (driver->has_irq(dev, fence->fence_class,
mask & ~DRM_FENCE_TYPE_EXE)) {
ret = drm_fence_lazy_wait(fence, ignore_signals,
mask);
if (ret)
return ret;
}
}
if (drm_fence_object_signaled(fence, mask, 0))
return 0;
/*
* Avoid kernel-space busy-waits.
*/
if (!ignore_signals)
return -EAGAIN;
do {
schedule();
signaled = drm_fence_object_signaled(fence, mask, 1);
} while (!signaled && !time_after_eq(jiffies, _end));
if (!signaled)
return -EBUSY;
return 0;
}
EXPORT_SYMBOL(drm_fence_object_wait);
int drm_fence_object_emit(struct drm_fence_object *fence, uint32_t fence_flags,
uint32_t fence_class, uint32_t type)
{
struct drm_device *dev = fence->dev;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_driver *driver = dev->driver->fence_driver;
struct drm_fence_class_manager *fc = &fm->fence_class[fence->fence_class];
unsigned long flags;
uint32_t sequence;
uint32_t native_type;
int ret;
drm_fence_unring(dev, &fence->ring);
ret = driver->emit(dev, fence_class, fence_flags, &sequence,
&native_type);
if (ret)
return ret;
write_lock_irqsave(&fm->lock, flags);
fence->fence_class = fence_class;
fence->type = type;
fence->flush_mask = 0x00;
fence->submitted_flush = 0x00;
fence->signaled = 0x00;
fence->sequence = sequence;
fence->native_type = native_type;
if (list_empty(&fc->ring))
fc->last_exe_flush = sequence - 1;
list_add_tail(&fence->ring, &fc->ring);
write_unlock_irqrestore(&fm->lock, flags);
return 0;
}
EXPORT_SYMBOL(drm_fence_object_emit);
static int drm_fence_object_init(struct drm_device *dev, uint32_t fence_class,
uint32_t type,
uint32_t fence_flags,
struct drm_fence_object *fence)
{
int ret = 0;
unsigned long flags;
struct drm_fence_manager *fm = &dev->fm;
mutex_lock(&dev->struct_mutex);
atomic_set(&fence->usage, 1);
mutex_unlock(&dev->struct_mutex);
write_lock_irqsave(&fm->lock, flags);
INIT_LIST_HEAD(&fence->ring);
/*
* Avoid hitting BUG() for kernel-only fence objects.
*/
INIT_LIST_HEAD(&fence->base.list);
fence->fence_class = fence_class;
fence->type = type;
fence->flush_mask = 0;
fence->submitted_flush = 0;
fence->signaled = 0;
fence->sequence = 0;
fence->dev = dev;
write_unlock_irqrestore(&fm->lock, flags);
if (fence_flags & DRM_FENCE_FLAG_EMIT) {
ret = drm_fence_object_emit(fence, fence_flags,
fence->fence_class, type);
}
return ret;
}
int drm_fence_add_user_object(struct drm_file *priv,
struct drm_fence_object *fence, int shareable)
{
struct drm_device *dev = priv->head->dev;
int ret;
mutex_lock(&dev->struct_mutex);
ret = drm_add_user_object(priv, &fence->base, shareable);
if (ret)
goto out;
atomic_inc(&fence->usage);
fence->base.type = drm_fence_type;
fence->base.remove = &drm_fence_object_destroy;
DRM_DEBUG("Fence 0x%08lx created\n", fence->base.hash.key);
out:
mutex_unlock(&dev->struct_mutex);
return ret;
}
EXPORT_SYMBOL(drm_fence_add_user_object);
int drm_fence_object_create(struct drm_device *dev, uint32_t fence_class,
uint32_t type, unsigned flags,
struct drm_fence_object **c_fence)
{
struct drm_fence_object *fence;
int ret;
struct drm_fence_manager *fm = &dev->fm;
fence = drm_ctl_calloc(1, sizeof(*fence), DRM_MEM_FENCE);
if (!fence)
return -ENOMEM;
ret = drm_fence_object_init(dev, fence_class, type, flags, fence);
if (ret) {
drm_fence_usage_deref_unlocked(&fence);
return ret;
}
*c_fence = fence;
atomic_inc(&fm->count);
return 0;
}
EXPORT_SYMBOL(drm_fence_object_create);
void drm_fence_manager_init(struct drm_device *dev)
{
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_class_manager *fence_class;
struct drm_fence_driver *fed = dev->driver->fence_driver;
int i;
unsigned long flags;
rwlock_init(&fm->lock);
write_lock_irqsave(&fm->lock, flags);
fm->initialized = 0;
if (!fed)
goto out_unlock;
fm->initialized = 1;
fm->num_classes = fed->num_classes;
BUG_ON(fm->num_classes > _DRM_FENCE_CLASSES);
for (i = 0; i < fm->num_classes; ++i) {
fence_class = &fm->fence_class[i];
INIT_LIST_HEAD(&fence_class->ring);
fence_class->pending_flush = 0;
DRM_INIT_WAITQUEUE(&fence_class->fence_queue);
}
atomic_set(&fm->count, 0);
out_unlock:
write_unlock_irqrestore(&fm->lock, flags);
}
void drm_fence_fill_arg(struct drm_fence_object *fence,
struct drm_fence_arg *arg)
{
struct drm_device *dev = fence->dev;
struct drm_fence_manager *fm = &dev->fm;
unsigned long irq_flags;
read_lock_irqsave(&fm->lock, irq_flags);
arg->handle = fence->base.hash.key;
arg->fence_class = fence->fence_class;
arg->type = fence->type;
arg->signaled = fence->signaled;
arg->error = fence->error;
arg->sequence = fence->sequence;
read_unlock_irqrestore(&fm->lock, irq_flags);
}
EXPORT_SYMBOL(drm_fence_fill_arg);
void drm_fence_manager_takedown(struct drm_device *dev)
{
}
struct drm_fence_object *drm_lookup_fence_object(struct drm_file *priv,
uint32_t handle)
{
struct drm_device *dev = priv->head->dev;
struct drm_user_object *uo;
struct drm_fence_object *fence;
mutex_lock(&dev->struct_mutex);
uo = drm_lookup_user_object(priv, handle);
if (!uo || (uo->type != drm_fence_type)) {
mutex_unlock(&dev->struct_mutex);
return NULL;
}
fence = drm_fence_reference_locked(drm_user_object_entry(uo, struct drm_fence_object, base));
mutex_unlock(&dev->struct_mutex);
return fence;
}
int drm_fence_create_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
int ret;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_arg *arg = data;
struct drm_fence_object *fence;
ret = 0;
if (!fm->initialized) {
DRM_ERROR("The DRM driver does not support fencing.\n");
return -EINVAL;
}
if (arg->flags & DRM_FENCE_FLAG_EMIT)
LOCK_TEST_WITH_RETURN(dev, file_priv);
ret = drm_fence_object_create(dev, arg->fence_class,
arg->type, arg->flags, &fence);
if (ret)
return ret;
ret = drm_fence_add_user_object(file_priv, fence,
arg->flags &
DRM_FENCE_FLAG_SHAREABLE);
if (ret) {
drm_fence_usage_deref_unlocked(&fence);
return ret;
}
/*
* usage > 0. No need to lock dev->struct_mutex;
*/
arg->handle = fence->base.hash.key;
drm_fence_fill_arg(fence, arg);
drm_fence_usage_deref_unlocked(&fence);
return ret;
}
int drm_fence_reference_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
int ret;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_arg *arg = data;
struct drm_fence_object *fence;
struct drm_user_object *uo;
ret = 0;
if (!fm->initialized) {
DRM_ERROR("The DRM driver does not support fencing.\n");
return -EINVAL;
}
ret = drm_user_object_ref(file_priv, arg->handle, drm_fence_type, &uo);
if (ret)
return ret;
fence = drm_lookup_fence_object(file_priv, arg->handle);
drm_fence_fill_arg(fence, arg);
drm_fence_usage_deref_unlocked(&fence);
return ret;
}
int drm_fence_unreference_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
int ret;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_arg *arg = data;
ret = 0;
if (!fm->initialized) {
DRM_ERROR("The DRM driver does not support fencing.\n");
return -EINVAL;
}
return drm_user_object_unref(file_priv, arg->handle, drm_fence_type);
}
int drm_fence_signaled_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
int ret;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_arg *arg = data;
struct drm_fence_object *fence;
ret = 0;
if (!fm->initialized) {
DRM_ERROR("The DRM driver does not support fencing.\n");
return -EINVAL;
}
fence = drm_lookup_fence_object(file_priv, arg->handle);
if (!fence)
return -EINVAL;
drm_fence_fill_arg(fence, arg);
drm_fence_usage_deref_unlocked(&fence);
return ret;
}
int drm_fence_flush_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
int ret;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_arg *arg = data;
struct drm_fence_object *fence;
ret = 0;
if (!fm->initialized) {
DRM_ERROR("The DRM driver does not support fencing.\n");
return -EINVAL;
}
fence = drm_lookup_fence_object(file_priv, arg->handle);
if (!fence)
return -EINVAL;
ret = drm_fence_object_flush(fence, arg->type);
drm_fence_fill_arg(fence, arg);
drm_fence_usage_deref_unlocked(&fence);
return ret;
}
int drm_fence_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
int ret;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_arg *arg = data;
struct drm_fence_object *fence;
ret = 0;
if (!fm->initialized) {
DRM_ERROR("The DRM driver does not support fencing.\n");
return -EINVAL;
}
fence = drm_lookup_fence_object(file_priv, arg->handle);
if (!fence)
return -EINVAL;
ret = drm_fence_object_wait(fence,
arg->flags & DRM_FENCE_FLAG_WAIT_LAZY,
0, arg->type);
drm_fence_fill_arg(fence, arg);
drm_fence_usage_deref_unlocked(&fence);
return ret;
}
int drm_fence_emit_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
int ret;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_arg *arg = data;
struct drm_fence_object *fence;
ret = 0;
if (!fm->initialized) {
DRM_ERROR("The DRM driver does not support fencing.\n");
return -EINVAL;
}
LOCK_TEST_WITH_RETURN(dev, file_priv);
fence = drm_lookup_fence_object(file_priv, arg->handle);
if (!fence)
return -EINVAL;
ret = drm_fence_object_emit(fence, arg->flags, arg->fence_class,
arg->type);
drm_fence_fill_arg(fence, arg);
drm_fence_usage_deref_unlocked(&fence);
return ret;
}
int drm_fence_buffers_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
int ret;
struct drm_fence_manager *fm = &dev->fm;
struct drm_fence_arg *arg = data;
struct drm_fence_object *fence;
ret = 0;
if (!fm->initialized) {
DRM_ERROR("The DRM driver does not support fencing.\n");
return -EINVAL;
}
if (!dev->bm.initialized) {
DRM_ERROR("Buffer object manager is not initialized\n");
return -EINVAL;
}
LOCK_TEST_WITH_RETURN(dev, file_priv);
ret = drm_fence_buffer_objects(dev, NULL, arg->flags,
NULL, &fence);
if (ret)
return ret;
if (!(arg->flags & DRM_FENCE_FLAG_NO_USER)) {
ret = drm_fence_add_user_object(file_priv, fence,
arg->flags &
DRM_FENCE_FLAG_SHAREABLE);
if (ret)
return ret;
}
arg->handle = fence->base.hash.key;
drm_fence_fill_arg(fence, arg);
drm_fence_usage_deref_unlocked(&fence);
return ret;
}