1 files changed, 65 insertions, 0 deletions
diff --git a/linux-core/mmfs_drv.h b/linux-core/mmfs_drv.h
new file mode 100644
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--- /dev/null
+++ b/linux-core/mmfs_drv.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright © 2008 Intel Corporation
+ *
+ * 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include <linux/spinlock.h>
+#include <linux/idr.h>
+
+/** @file mmfs_drv.h
+ * This file provides structure definitions and function prototypes for mmfs.
+ */
+
+/**
+ * This structure defines the mmfs memory object, which will be used by the
+ * DRM for its buffer objects.
+ */
+struct mmfs_object {
+	/** File representing the shmem storage */
+	struct file *filp;
+
+	spinlock_t lock;
+
+	size_t size;
+	/** Reference count of this object, protected by object_lock */
+	int refcount;
+};
+
+/**
+ * This structure defines the process (actually per-fd) mapping of object
+ * handles to mmfs objects.
+ */
+struct mmfs_file {
+	/** Mapping of object handles to object pointers. */
+	struct idr object_idr;
+	/**
+	 * Lock for synchronization of access to object->refcount and
+	 * object_idr.  See note in mmfs_unreference_ioctl.
+	 */
+	spinlock_t delete_lock;
+};
+
+void mmfs_object_reference(struct mmfs_object *obj);
+void mmfs_object_unreference(struct mmfs_object *obj);