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>
40 #include <linux/completion.h>
41 #include <rdma/ib_peer_mem.h>
46 typedef void (*umem_invalidate_func_t)(void *invalidation_cookie,
48 unsigned long addr, size_t size);
50 struct invalidation_ctx {
52 umem_invalidate_func_t func;
54 unsigned long context_ticket;
56 int inflight_invalidation;
58 struct completion comp;
62 struct ib_ucontext *context;
68 struct work_struct work;
71 struct sg_table sg_head;
74 /* peer memory that manages this umem*/
75 struct ib_peer_memory_client *ib_peer_mem;
76 struct invalidation_ctx *invalidation_ctx;
77 int peer_mem_srcu_key;
78 /* peer memory private context */
79 void *peer_mem_client_context;
82 struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
83 size_t size, int access, int dmasync);
84 struct ib_umem *ib_umem_get_ex(struct ib_ucontext *context, unsigned long addr,
85 size_t size, int access, int dmasync,
86 int invalidation_supported);
87 void ib_umem_activate_invalidation_notifier(struct ib_umem *umem,
88 umem_invalidate_func_t func,
90 void ib_umem_release(struct ib_umem *umem);
91 int ib_umem_page_count(struct ib_umem *umem);
93 #endif /* IB_UMEM_H */