diff options
author | Eric Anholt <eric@anholt.net> | 2008-04-23 11:22:59 -0700 |
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committer | Eric Anholt <eric@anholt.net> | 2008-04-23 11:23:40 -0700 |
commit | 8665b666c7e2ecdee7d27e1ad540910a0223ba6d (patch) | |
tree | 8e97be4727bfb5d45a2b5a02174e815a7a0568b0 /linux-core/mmfs_drv.h | |
parent | 47a2b7dc03e35d4eaf8148b87aeea8dd96723b4d (diff) |
Move mmfs.h userland interface to shared-core.
Diffstat (limited to 'linux-core/mmfs_drv.h')
-rw-r--r-- | linux-core/mmfs_drv.h | 65 |
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 index 00000000..1944d2af --- /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); |