1*4882a593Smuzhiyun #ifndef _HFI1_USER_EXP_RCV_H
2*4882a593Smuzhiyun #define _HFI1_USER_EXP_RCV_H
3*4882a593Smuzhiyun /*
4*4882a593Smuzhiyun * Copyright(c) 2020 - Cornelis Networks, Inc.
5*4882a593Smuzhiyun * Copyright(c) 2015 - 2017 Intel Corporation.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * This file is provided under a dual BSD/GPLv2 license. When using or
8*4882a593Smuzhiyun * redistributing this file, you may do so under either license.
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * GPL LICENSE SUMMARY
11*4882a593Smuzhiyun *
12*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or modify
13*4882a593Smuzhiyun * it under the terms of version 2 of the GNU General Public License as
14*4882a593Smuzhiyun * published by the Free Software Foundation.
15*4882a593Smuzhiyun *
16*4882a593Smuzhiyun * This program is distributed in the hope that it will be useful, but
17*4882a593Smuzhiyun * WITHOUT ANY WARRANTY; without even the implied warranty of
18*4882a593Smuzhiyun * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19*4882a593Smuzhiyun * General Public License for more details.
20*4882a593Smuzhiyun *
21*4882a593Smuzhiyun * BSD LICENSE
22*4882a593Smuzhiyun *
23*4882a593Smuzhiyun * Redistribution and use in source and binary forms, with or without
24*4882a593Smuzhiyun * modification, are permitted provided that the following conditions
25*4882a593Smuzhiyun * are met:
26*4882a593Smuzhiyun *
27*4882a593Smuzhiyun * - Redistributions of source code must retain the above copyright
28*4882a593Smuzhiyun * notice, this list of conditions and the following disclaimer.
29*4882a593Smuzhiyun * - Redistributions in binary form must reproduce the above copyright
30*4882a593Smuzhiyun * notice, this list of conditions and the following disclaimer in
31*4882a593Smuzhiyun * the documentation and/or other materials provided with the
32*4882a593Smuzhiyun * distribution.
33*4882a593Smuzhiyun * - Neither the name of Intel Corporation nor the names of its
34*4882a593Smuzhiyun * contributors may be used to endorse or promote products derived
35*4882a593Smuzhiyun * from this software without specific prior written permission.
36*4882a593Smuzhiyun *
37*4882a593Smuzhiyun * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
38*4882a593Smuzhiyun * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
39*4882a593Smuzhiyun * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
40*4882a593Smuzhiyun * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
41*4882a593Smuzhiyun * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42*4882a593Smuzhiyun * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43*4882a593Smuzhiyun * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
44*4882a593Smuzhiyun * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
45*4882a593Smuzhiyun * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
46*4882a593Smuzhiyun * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
47*4882a593Smuzhiyun * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48*4882a593Smuzhiyun *
49*4882a593Smuzhiyun */
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun #include "hfi.h"
52*4882a593Smuzhiyun #include "exp_rcv.h"
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun struct tid_pageset {
55*4882a593Smuzhiyun u16 idx;
56*4882a593Smuzhiyun u16 count;
57*4882a593Smuzhiyun };
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun struct tid_user_buf {
60*4882a593Smuzhiyun unsigned long vaddr;
61*4882a593Smuzhiyun unsigned long length;
62*4882a593Smuzhiyun unsigned int npages;
63*4882a593Smuzhiyun struct page **pages;
64*4882a593Smuzhiyun struct tid_pageset *psets;
65*4882a593Smuzhiyun unsigned int n_psets;
66*4882a593Smuzhiyun };
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun struct tid_rb_node {
69*4882a593Smuzhiyun struct mmu_interval_notifier notifier;
70*4882a593Smuzhiyun struct hfi1_filedata *fdata;
71*4882a593Smuzhiyun unsigned long phys;
72*4882a593Smuzhiyun struct tid_group *grp;
73*4882a593Smuzhiyun u32 rcventry;
74*4882a593Smuzhiyun dma_addr_t dma_addr;
75*4882a593Smuzhiyun bool freed;
76*4882a593Smuzhiyun unsigned int npages;
77*4882a593Smuzhiyun struct page *pages[];
78*4882a593Smuzhiyun };
79*4882a593Smuzhiyun
num_user_pages(unsigned long addr,unsigned long len)80*4882a593Smuzhiyun static inline int num_user_pages(unsigned long addr,
81*4882a593Smuzhiyun unsigned long len)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun const unsigned long spage = addr & PAGE_MASK;
84*4882a593Smuzhiyun const unsigned long epage = (addr + len - 1) & PAGE_MASK;
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun return 1 + ((epage - spage) >> PAGE_SHIFT);
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd,
90*4882a593Smuzhiyun struct hfi1_ctxtdata *uctxt);
91*4882a593Smuzhiyun void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd);
92*4882a593Smuzhiyun int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
93*4882a593Smuzhiyun struct hfi1_tid_info *tinfo);
94*4882a593Smuzhiyun int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd,
95*4882a593Smuzhiyun struct hfi1_tid_info *tinfo);
96*4882a593Smuzhiyun int hfi1_user_exp_rcv_invalid(struct hfi1_filedata *fd,
97*4882a593Smuzhiyun struct hfi1_tid_info *tinfo);
98*4882a593Smuzhiyun
mm_from_tid_node(struct tid_rb_node * node)99*4882a593Smuzhiyun static inline struct mm_struct *mm_from_tid_node(struct tid_rb_node *node)
100*4882a593Smuzhiyun {
101*4882a593Smuzhiyun return node->notifier.mm;
102*4882a593Smuzhiyun }
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun #endif /* _HFI1_USER_EXP_RCV_H */
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