1 files changed, 65 insertions, 0 deletions
diff --git a/linux/drm_sg.h b/linux/drm_sg.h
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--- /dev/null
+++ b/linux/drm_sg.h
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+/**
+ * \file drm_sg.h 
+ * IOCTLs to manage scatter/gather memory
+ *
+ * \author Gareth Hughes <gareth@valinux.com>
+ */
+
+/*
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * 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, 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
+ * PRECISION INSIGHT 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.
+ */
+
+
+#ifndef _DRM_SCATTER_H_
+#define _DRM_SCATTER_H_
+
+
+/**
+ * Scatter/gather memory entry.
+ *
+ * This structure is used by sg_alloc() sg_free() to store all the necessary
+ * information about a scatter/gather memory block.
+ * 
+ * Also one instance of this structure is used to hold the user-space
+ * allocation done via the sg_alloc_ioctl() and sg_free_ioctl() ioctl's.
+ */
+typedef struct drm_sg_mem {
+	unsigned long   handle;
+	void            *virtual;	/**< virtual address */
+	int             pages;
+	struct page     **pagelist;
+	dma_addr_t	*busaddr;	/**< bus address */
+} drm_sg_mem_t;
+
+
+/** \name Prototypes */
+/*@{*/
+extern void DRM(sg_free)( drm_sg_mem_t *entry );
+extern drm_sg_mem_t * DRM(sg_alloc)( unsigned long size );
+extern int DRM(sg_alloc_ioctl)(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
+extern int DRM(sg_free_ioctl)(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
+extern void DRM(sg_cleanup)(drm_device_t *dev);
+/*@}*/
+
+
+#endif