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Diffstat (limited to 'linux-core/drm_fence.c')
-rw-r--r--linux-core/drm_fence.c128
1 files changed, 77 insertions, 51 deletions
diff --git a/linux-core/drm_fence.c b/linux-core/drm_fence.c
index b5fc2235..5215feb6 100644
--- a/linux-core/drm_fence.c
+++ b/linux-core/drm_fence.c
@@ -124,56 +124,76 @@ static void drm_fence_unring(drm_device_t * dev, struct list_head *ring)
write_unlock_irqrestore(&fm->lock, flags);
}
-void drm_fence_usage_deref_locked(drm_device_t * dev,
- drm_fence_object_t * fence)
+void drm_fence_usage_deref_locked(drm_fence_object_t ** fence)
{
+ struct drm_fence_object *tmp_fence = *fence;
+ struct drm_device *dev = tmp_fence->dev;
drm_fence_manager_t *fm = &dev->fm;
DRM_ASSERT_LOCKED(&dev->struct_mutex);
-
- if (atomic_dec_and_test(&fence->usage)) {
- drm_fence_unring(dev, &fence->ring);
+ *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",
- fence->base.hash.key);
+ tmp_fence->base.hash.key);
atomic_dec(&fm->count);
- BUG_ON(!list_empty(&fence->base.list));
- drm_ctl_free(fence, sizeof(*fence), DRM_MEM_FENCE);
+ BUG_ON(!list_empty(&tmp_fence->base.list));
+ drm_ctl_free(tmp_fence, sizeof(*tmp_fence), DRM_MEM_FENCE);
}
}
-void drm_fence_usage_deref_unlocked(drm_device_t * dev,
- drm_fence_object_t * fence)
+void drm_fence_usage_deref_unlocked(drm_fence_object_t ** fence)
{
+ struct drm_fence_object *tmp_fence = *fence;
+ struct drm_device *dev = tmp_fence->dev;
drm_fence_manager_t *fm = &dev->fm;
- if (atomic_dec_and_test(&fence->usage)) {
+ *fence = NULL;
+ if (atomic_dec_and_test(&tmp_fence->usage)) {
mutex_lock(&dev->struct_mutex);
- if (atomic_read(&fence->usage) == 0) {
- drm_fence_unring(dev, &fence->ring);
+ if (atomic_read(&tmp_fence->usage) == 0) {
+ drm_fence_unring(dev, &tmp_fence->ring);
atomic_dec(&fm->count);
- BUG_ON(!list_empty(&fence->base.list));
- drm_ctl_free(fence, sizeof(*fence), DRM_MEM_FENCE);
+ BUG_ON(!list_empty(&tmp_fence->base.list));
+ drm_ctl_free(tmp_fence, sizeof(*tmp_fence), DRM_MEM_FENCE);
}
mutex_unlock(&dev->struct_mutex);
}
}
-static void drm_fence_object_destroy(drm_file_t * priv,
- drm_user_object_t * base)
+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);
+}
+
+
+static void drm_fence_object_destroy(drm_file_t *priv, drm_user_object_t * base)
{
- drm_device_t *dev = priv->head->dev;
drm_fence_object_t *fence =
drm_user_object_entry(base, drm_fence_object_t, base);
- drm_fence_usage_deref_locked(dev, fence);
+ drm_fence_usage_deref_locked(&fence);
}
-int drm_fence_object_signaled(drm_device_t * dev,
- drm_fence_object_t * fence,
- uint32_t mask, int poke_flush)
+int drm_fence_object_signaled(drm_fence_object_t * fence,
+ uint32_t mask, int poke_flush)
{
unsigned long flags;
int signaled;
+ struct drm_device *dev = fence->dev;
drm_fence_manager_t *fm = &dev->fm;
drm_fence_driver_t *driver = dev->driver->fence_driver;
@@ -204,10 +224,10 @@ static void drm_fence_flush_exe(drm_fence_class_manager_t * fc,
}
}
-int drm_fence_object_flush(drm_device_t * dev,
- drm_fence_object_t * fence,
+int drm_fence_object_flush(drm_fence_object_t * fence,
uint32_t type)
{
+ struct drm_device *dev = fence->dev;
drm_fence_manager_t *fm = &dev->fm;
drm_fence_class_manager_t *fc = &fm->class[fence->class];
drm_fence_driver_t *driver = dev->driver->fence_driver;
@@ -270,24 +290,23 @@ void drm_fence_flush_old(drm_device_t * dev, uint32_t class, uint32_t sequence)
mutex_unlock(&dev->struct_mutex);
return;
}
- fence = list_entry(fc->ring.next, drm_fence_object_t, ring);
- atomic_inc(&fence->usage);
+ fence = drm_fence_reference_locked(list_entry(fc->ring.next, drm_fence_object_t, 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(dev, fence, fence->type);
+ drm_fence_object_flush(fence, fence->type);
}
- drm_fence_usage_deref_unlocked(dev, fence);
+ drm_fence_usage_deref_unlocked(&fence);
}
EXPORT_SYMBOL(drm_fence_flush_old);
-static int drm_fence_lazy_wait(drm_device_t *dev,
- drm_fence_object_t *fence,
+static int drm_fence_lazy_wait(drm_fence_object_t *fence,
int ignore_signals,
uint32_t mask)
{
+ struct drm_device *dev = fence->dev;
drm_fence_manager_t *fm = &dev->fm;
drm_fence_class_manager_t *fc = &fm->class[fence->class];
int signaled;
@@ -296,13 +315,13 @@ static int drm_fence_lazy_wait(drm_device_t *dev,
do {
DRM_WAIT_ON(ret, fc->fence_queue, 3 * DRM_HZ,
- (signaled = drm_fence_object_signaled(dev, fence, mask, 1)));
+ (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(dev, fence, mask, 0))
+ if (drm_fence_object_signaled(fence, mask, 0))
return 0;
if (time_after_eq(jiffies, _end))
ret = -EBUSY;
@@ -317,10 +336,10 @@ static int drm_fence_lazy_wait(drm_device_t *dev,
return 0;
}
-int drm_fence_object_wait(drm_device_t * dev,
- drm_fence_object_t * fence,
+int drm_fence_object_wait(drm_fence_object_t * fence,
int lazy, int ignore_signals, uint32_t mask)
{
+ struct drm_device *dev = fence->dev;
drm_fence_driver_t *driver = dev->driver->fence_driver;
int ret = 0;
unsigned long _end;
@@ -332,16 +351,16 @@ int drm_fence_object_wait(drm_device_t * dev,
return -EINVAL;
}
- if (drm_fence_object_signaled(dev, fence, mask, 0))
+ if (drm_fence_object_signaled(fence, mask, 0))
return 0;
_end = jiffies + 3 * DRM_HZ;
- drm_fence_object_flush(dev, fence, mask);
+ drm_fence_object_flush(fence, mask);
if (lazy && driver->lazy_capable) {
- ret = drm_fence_lazy_wait(dev, fence, ignore_signals, mask);
+ ret = drm_fence_lazy_wait(fence, ignore_signals, mask);
if (ret)
return ret;
@@ -349,7 +368,7 @@ int drm_fence_object_wait(drm_device_t * dev,
if (driver->has_irq(dev, fence->class,
DRM_FENCE_TYPE_EXE)) {
- ret = drm_fence_lazy_wait(dev, fence, ignore_signals,
+ ret = drm_fence_lazy_wait(fence, ignore_signals,
DRM_FENCE_TYPE_EXE);
if (ret)
return ret;
@@ -357,13 +376,13 @@ int drm_fence_object_wait(drm_device_t * dev,
if (driver->has_irq(dev, fence->class,
mask & ~DRM_FENCE_TYPE_EXE)) {
- ret = drm_fence_lazy_wait(dev, fence, ignore_signals,
+ ret = drm_fence_lazy_wait(fence, ignore_signals,
mask);
if (ret)
return ret;
}
}
- if (drm_fence_object_signaled(dev, fence, mask, 0))
+ if (drm_fence_object_signaled(fence, mask, 0))
return 0;
/*
@@ -375,7 +394,7 @@ int drm_fence_object_wait(drm_device_t * dev,
#endif
do {
schedule();
- signaled = drm_fence_object_signaled(dev, fence, mask, 1);
+ signaled = drm_fence_object_signaled(fence, mask, 1);
} while (!signaled && !time_after_eq(jiffies, _end));
if (!signaled)
@@ -384,9 +403,10 @@ int drm_fence_object_wait(drm_device_t * dev,
return 0;
}
-int drm_fence_object_emit(drm_device_t * dev, drm_fence_object_t * fence,
+int drm_fence_object_emit(drm_fence_object_t * fence,
uint32_t fence_flags, uint32_t class, uint32_t type)
{
+ struct drm_device *dev = fence->dev;
drm_fence_manager_t *fm = &dev->fm;
drm_fence_driver_t *driver = dev->driver->fence_driver;
drm_fence_class_manager_t *fc = &fm->class[fence->class];
@@ -430,15 +450,22 @@ static int drm_fence_object_init(drm_device_t * dev, uint32_t class,
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->class = 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(dev, fence, fence_flags,
+ ret = drm_fence_object_emit(fence, fence_flags,
fence->class, type);
}
return ret;
@@ -476,7 +503,7 @@ int drm_fence_object_create(drm_device_t * dev, uint32_t class, uint32_t type,
return -ENOMEM;
ret = drm_fence_object_init(dev, class, type, flags, fence);
if (ret) {
- drm_fence_usage_deref_unlocked(dev, fence);
+ drm_fence_usage_deref_unlocked(&fence);
return ret;
}
*c_fence = fence;
@@ -533,8 +560,7 @@ drm_fence_object_t *drm_lookup_fence_object(drm_file_t * priv, uint32_t handle)
mutex_unlock(&dev->struct_mutex);
return NULL;
}
- fence = drm_user_object_entry(uo, drm_fence_object_t, base);
- atomic_inc(&fence->usage);
+ fence = drm_fence_reference_locked(drm_user_object_entry(uo, drm_fence_object_t, base));
mutex_unlock(&dev->struct_mutex);
return fence;
}
@@ -568,7 +594,7 @@ int drm_fence_ioctl(DRM_IOCTL_ARGS)
arg.flags &
DRM_FENCE_FLAG_SHAREABLE);
if (ret) {
- drm_fence_usage_deref_unlocked(dev, fence);
+ drm_fence_usage_deref_unlocked(&fence);
return ret;
}
arg.handle = fence->base.hash.key;
@@ -603,14 +629,14 @@ int drm_fence_ioctl(DRM_IOCTL_ARGS)
fence = drm_lookup_fence_object(priv, arg.handle);
if (!fence)
return -EINVAL;
- ret = drm_fence_object_flush(dev, fence, arg.type);
+ ret = drm_fence_object_flush(fence, arg.type);
break;
case drm_fence_wait:
fence = drm_lookup_fence_object(priv, arg.handle);
if (!fence)
return -EINVAL;
ret =
- drm_fence_object_wait(dev, fence,
+ drm_fence_object_wait(fence,
arg.flags & DRM_FENCE_FLAG_WAIT_LAZY,
0, arg.type);
break;
@@ -619,7 +645,7 @@ int drm_fence_ioctl(DRM_IOCTL_ARGS)
fence = drm_lookup_fence_object(priv, arg.handle);
if (!fence)
return -EINVAL;
- ret = drm_fence_object_emit(dev, fence, arg.flags, arg.class,
+ ret = drm_fence_object_emit(fence, arg.flags, arg.class,
arg.type);
break;
case drm_fence_buffers:
@@ -647,7 +673,7 @@ int drm_fence_ioctl(DRM_IOCTL_ARGS)
arg.type = fence->type;
arg.signaled = fence->signaled;
read_unlock_irqrestore(&fm->lock, flags);
- drm_fence_usage_deref_unlocked(dev, fence);
+ drm_fence_usage_deref_unlocked(&fence);
DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg));
return ret;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 21:17:29 +0000