1 #ifndef _HFI1_USER_EXP_RCV_H
2 #define _HFI1_USER_EXP_RCV_H
3 /*
4 * Copyright(c) 2015 - 2017 Intel Corporation.
5 *
6 * This file is provided under a dual BSD/GPLv2 license. When using or
7 * redistributing this file, you may do so under either license.
8 *
9 * GPL LICENSE SUMMARY
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * BSD LICENSE
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 *
26 * - Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * - Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in
30 * the documentation and/or other materials provided with the
31 * distribution.
32 * - Neither the name of Intel Corporation nor the names of its
33 * contributors may be used to endorse or promote products derived
34 * from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
37 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
38 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
39 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
40 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
43 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
44 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
45 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
46 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
47 *
48 */
49
50 #include "hfi.h"
51 #include "exp_rcv.h"
52
53 struct tid_pageset {
54 u16 idx;
55 u16 count;
56 };
57
58 struct tid_user_buf {
59 unsigned long vaddr;
60 unsigned long length;
61 unsigned int npages;
62 struct page **pages;
63 struct tid_pageset *psets;
64 unsigned int n_psets;
65 };
66
67 struct tid_rb_node {
68 struct mmu_rb_node mmu;
69 unsigned long phys;
70 struct tid_group *grp;
71 u32 rcventry;
72 dma_addr_t dma_addr;
73 bool freed;
74 unsigned int npages;
75 struct page *pages[0];
76 };
77
78 static inline int num_user_pages(unsigned long addr,
79 unsigned long len)
80 {
81 const unsigned long spage = addr & PAGE_MASK;
82 const unsigned long epage = (addr + len - 1) & PAGE_MASK;
83
84 return 1 + ((epage - spage) >> PAGE_SHIFT);
85 }
86
87 int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd,
88 struct hfi1_ctxtdata *uctxt);
89 void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd);
90 int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
91 struct hfi1_tid_info *tinfo);
92 int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
93 struct hfi1_tid_info *tinfo);
94 int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
95 struct hfi1_tid_info *tinfo);
96
97 #endif /* _HFI1_USER_EXP_RCV_H */