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Diffstat (limited to 'src/gallium/winsys/g3dvl/nouveau/nouveau_lock.c')
-rw-r--r--src/gallium/winsys/g3dvl/nouveau/nouveau_lock.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/src/gallium/winsys/g3dvl/nouveau/nouveau_lock.c b/src/gallium/winsys/g3dvl/nouveau/nouveau_lock.c
new file mode 100644
index 0000000000..375634bd05
--- /dev/null
+++ b/src/gallium/winsys/g3dvl/nouveau/nouveau_lock.c
@@ -0,0 +1,92 @@
+/**************************************************************************
+ *
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 TUNGSTEN GRAPHICS 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.
+ *
+ **************************************************************************/
+
+#include <pthread.h>
+#include <driclient.h>
+#include "nouveau_context.h"
+#include "nouveau_screen.h"
+
+static pthread_mutex_t lockMutex = PTHREAD_MUTEX_INITIALIZER;
+
+static void
+nouveau_contended_lock(struct nouveau_context *nv, unsigned int flags)
+{
+ dri_drawable_t *dri_drawable = nv->dri_drawable;
+ dri_screen_t *dri_screen = nv->dri_context->dri_screen;
+ struct nouveau_screen *nv_screen = nv->nv_screen;
+ struct nouveau_device *dev = nv_screen->device;
+ struct nouveau_device_priv *nvdev = nouveau_device(dev);
+
+ drmGetLock(nvdev->fd, nvdev->ctx, flags);
+
+ /* If the window moved, may need to set a new cliprect now.
+ *
+ * NOTE: This releases and regains the hw lock, so all state
+ * checking must be done *after* this call:
+ */
+ if (dri_drawable)
+ DRI_VALIDATE_DRAWABLE_INFO(dri_screen, dri_drawable);
+}
+
+/* Lock the hardware and validate our state.
+ */
+void
+LOCK_HARDWARE(struct nouveau_context *nv)
+{
+ struct nouveau_screen *nv_screen = nv->nv_screen;
+ struct nouveau_device *dev = nv_screen->device;
+ struct nouveau_device_priv *nvdev = nouveau_device(dev);
+ char __ret=0;
+
+ pthread_mutex_lock(&lockMutex);
+ assert(!nv->locked);
+
+ DRM_CAS(nvdev->lock, nvdev->ctx,
+ (DRM_LOCK_HELD | nvdev->ctx), __ret);
+
+ if (__ret)
+ nouveau_contended_lock(nv, 0);
+ nv->locked = 1;
+}
+
+
+/* Unlock the hardware using the global current context
+ */
+void
+UNLOCK_HARDWARE(struct nouveau_context *nv)
+{
+ struct nouveau_screen *nv_screen = nv->nv_screen;
+ struct nouveau_device *dev = nv_screen->device;
+ struct nouveau_device_priv *nvdev = nouveau_device(dev);
+
+ assert(nv->locked);
+ nv->locked = 0;
+
+ DRM_UNLOCK(nvdev->fd, nvdev->lock, nvdev->ctx);
+
+ pthread_mutex_unlock(&lockMutex);
+}