2 * Copyright (c) 2007 Cisco Systems. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/list.h>
37 #include <linux/scatterlist.h>
38 #include <linux/workqueue.h>
39 #include <linux/dma-attrs.h>
44 struct ib_ucontext *context;
50 struct list_head chunk_list;
52 struct work_struct work;
62 struct ib_ucontext *context;
64 /* Link list of contiguous blocks being part of that cmem */
65 struct list_head ib_cmem_block;
67 /* Order of cmem block, 2^ block_order will equal number
68 of physical pages per block
70 unsigned long block_order;
71 /* Refernce counter for that memory area
72 - When value became 0 pages will be returned to the kernel.
78 struct ib_umem_chunk {
79 struct list_head list;
82 struct dma_attrs attrs;
83 struct scatterlist page_list[0];
86 struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
87 size_t size, int access, int dmasync);
88 void ib_umem_release(struct ib_umem *umem);
89 int ib_umem_page_count(struct ib_umem *umem);
91 int ib_cmem_map_contiguous_pages_to_vma(struct ib_cmem *ib_cmem,
92 struct vm_area_struct *vma);
93 struct ib_cmem *ib_cmem_alloc_contiguous_pages(struct ib_ucontext *context,
94 unsigned long total_size,
95 unsigned long page_size_order);
96 void ib_cmem_release_contiguous_pages(struct ib_cmem *cmem);
97 int ib_umem_map_to_vma(struct ib_umem *umem,
98 struct vm_area_struct *vma);
101 #endif /* IB_UMEM_H */