diff options
Diffstat (limited to 'linux/drm_sg.h')
-rw-r--r-- | linux/drm_sg.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/linux/drm_sg.h b/linux/drm_sg.h new file mode 100644 index 00000000..afd80ef0 --- /dev/null +++ b/linux/drm_sg.h @@ -0,0 +1,65 @@ +/** + * \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 |