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
40 struct ib_umem_chunk {
41 TAILQ_ENTRY(ib_umem_chunk) entry;
44 struct rdma_scatterlist page_list[0];
48 struct ib_ucontext *context;
53 TAILQ_HEAD(, ib_umem_chunk) chunk_list;
55 struct work_struct work;
61 #ifdef CONFIG_INFINIBAND_USER_MEM
63 struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
64 size_t size, int access);
65 void ib_umem_release(struct ib_umem *umem);
66 int ib_umem_page_count(struct ib_umem *umem);
68 #else /* CONFIG_INFINIBAND_USER_MEM */
71 static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context,
72 unsigned long addr, size_t size,
74 return ERR_PTR(EINVAL);
76 static inline void ib_umem_release(struct ib_umem *umem) { }
77 static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; }
79 #endif /* CONFIG_INFINIBAND_USER_MEM */
81 #endif /* IB_UMEM_H */