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 */
98