1 #ifndef _HFI1_USER_EXP_RCV_H
2 #define _HFI1_USER_EXP_RCV_H
3 /*
4 * Copyright(c) 2020 - Cornelis Networks, Inc.
5 * Copyright(c) 2015 - 2017 Intel Corporation.
6 *
7 * This file is provided under a dual BSD/GPLv2 license. When using or
8 * redistributing this file, you may do so under either license.
9 *
10 * GPL LICENSE SUMMARY
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * BSD LICENSE
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 *
27 * - Redistributions of source code must retain the above copyright
28 * notice, this list of conditions and the following disclaimer.
29 * - Redistributions in binary form must reproduce the above copyright
30 * notice, this list of conditions and the following disclaimer in
31 * the documentation and/or other materials provided with the
32 * distribution.
33 * - Neither the name of Intel Corporation nor the names of its
34 * contributors may be used to endorse or promote products derived
35 * from this software without specific prior written permission.
36 *
37 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
38 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
39 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
40 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
41 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
44 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
45 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 *
49 */
50
51 #include "hfi.h"
52 #include "exp_rcv.h"
53
54 struct tid_pageset {
55 u16 idx;
56 u16 count;
57 };
58
59 struct tid_user_buf {
60 struct mmu_interval_notifier notifier;
61 struct mutex cover_mutex;
62 unsigned long vaddr;
63 unsigned long length;
64 unsigned int npages;
65 struct page **pages;
66 struct tid_pageset *psets;
67 unsigned int n_psets;
68 };
69
70 struct tid_rb_node {
71 struct mmu_interval_notifier notifier;
72 struct hfi1_filedata *fdata;
73 struct mutex invalidate_mutex; /* covers hw removal */
74 unsigned long phys;
75 struct tid_group *grp;
76 u32 rcventry;
77 dma_addr_t dma_addr;
78 bool freed;
79 unsigned int npages;
80 struct page *pages[];
81 };
82
num_user_pages(unsigned long addr,unsigned long len)83 static inline int num_user_pages(unsigned long addr,
84 unsigned long len)
85 {
86 const unsigned long spage = addr & PAGE_MASK;
87 const unsigned long epage = (addr + len - 1) & PAGE_MASK;
88
89 return 1 + ((epage - spage) >> PAGE_SHIFT);
90 }
91
92 int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd,
93 struct hfi1_ctxtdata *uctxt);
94 void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd);
95 int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
96 struct hfi1_tid_info *tinfo);
97 int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
98 struct hfi1_tid_info *tinfo);
99 int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
100 struct hfi1_tid_info *tinfo);
101
mm_from_tid_node(struct tid_rb_node * node)102 static inline struct mm_struct *mm_from_tid_node(struct tid_rb_node *node)
103 {
104 return node->notifier.mm;
105 }
106
107 #endif /* _HFI1_USER_EXP_RCV_H */
108