diff options
| -rw-r--r-- | bsd-core/drm_lock.c | 128 |
1 files changed, 64 insertions, 64 deletions
diff --git a/bsd-core/drm_lock.c b/bsd-core/drm_lock.c index 523d0409..fe66eca0 100644 --- a/bsd-core/drm_lock.c +++ b/bsd-core/drm_lock.c @@ -49,70 +49,6 @@ #include "drmP.h" -int drm_lock_take(__volatile__ unsigned int *lock, unsigned int context) -{ - unsigned int old, new; - - do { - old = *lock; - if (old & _DRM_LOCK_HELD) - new = old | _DRM_LOCK_CONT; - else - new = context | _DRM_LOCK_HELD; - } while (!atomic_cmpset_int(lock, old, new)); - - if (_DRM_LOCKING_CONTEXT(old) == context) { - if (old & _DRM_LOCK_HELD) { - if (context != DRM_KERNEL_CONTEXT) { - DRM_ERROR("%d holds heavyweight lock\n", - context); - } - return 0; - } - } - if (new == (context | _DRM_LOCK_HELD)) { - /* Have lock */ - return 1; - } - return 0; -} - -/* This takes a lock forcibly and hands it to context. Should ONLY be used - inside *_unlock to give lock to kernel before calling *_dma_schedule. */ -int drm_lock_transfer(struct drm_device *dev, - __volatile__ unsigned int *lock, unsigned int context) -{ - unsigned int old, new; - - dev->lock.file_priv = NULL; - do { - old = *lock; - new = context | _DRM_LOCK_HELD; - } while (!atomic_cmpset_int(lock, old, new)); - - return 1; -} - -int drm_lock_free(struct drm_device *dev, - __volatile__ unsigned int *lock, unsigned int context) -{ - unsigned int old, new; - - dev->lock.file_priv = NULL; - do { - old = *lock; - new = 0; - } while (!atomic_cmpset_int(lock, old, new)); - - if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) { - DRM_ERROR("%d freed heavyweight lock held by %d\n", - context, _DRM_LOCKING_CONTEXT(old)); - return 1; - } - DRM_WAKEUP_INT((void *)&dev->lock.lock_queue); - return 0; -} - int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_lock *lock = data; @@ -202,3 +138,67 @@ int drm_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv) return 0; } + +int drm_lock_take(__volatile__ unsigned int *lock, unsigned int context) +{ + unsigned int old, new; + + do { + old = *lock; + if (old & _DRM_LOCK_HELD) + new = old | _DRM_LOCK_CONT; + else + new = context | _DRM_LOCK_HELD; + } while (!atomic_cmpset_int(lock, old, new)); + + if (_DRM_LOCKING_CONTEXT(old) == context) { + if (old & _DRM_LOCK_HELD) { + if (context != DRM_KERNEL_CONTEXT) { + DRM_ERROR("%d holds heavyweight lock\n", + context); + } + return 0; + } + } + if (new == (context | _DRM_LOCK_HELD)) { + /* Have lock */ + return 1; + } + return 0; +} + +/* This takes a lock forcibly and hands it to context. Should ONLY be used + inside *_unlock to give lock to kernel before calling *_dma_schedule. */ +int drm_lock_transfer(struct drm_device *dev, + __volatile__ unsigned int *lock, unsigned int context) +{ + unsigned int old, new; + + dev->lock.file_priv = NULL; + do { + old = *lock; + new = context | _DRM_LOCK_HELD; + } while (!atomic_cmpset_int(lock, old, new)); + + return 1; +} + +int drm_lock_free(struct drm_device *dev, + __volatile__ unsigned int *lock, unsigned int context) +{ + unsigned int old, new; + + dev->lock.file_priv = NULL; + do { + old = *lock; + new = 0; + } while (!atomic_cmpset_int(lock, old, new)); + + if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) { + DRM_ERROR("%d freed heavyweight lock held by %d\n", + context, _DRM_LOCKING_CONTEXT(old)); + return 1; + } + DRM_WAKEUP_INT((void *)&dev->lock.lock_queue); + return 0; +} |