1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
* Copyright(c) 2015 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include "vt.h"
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("RDMA Verbs Transport Library");
static int rvt_init(void)
{
/* Do any work needed prior to drivers calling for registration*/
return 0;
}
module_init(rvt_init);
static void rvt_cleanup(void)
{
}
module_exit(rvt_cleanup);
static int rvt_query_device(struct ib_device *ibdev,
struct ib_device_attr *props,
struct ib_udata *uhw)
{
/*
* Return rvt_dev_info.props contents
*/
return -EOPNOTSUPP;
}
static int rvt_modify_device(struct ib_device *device,
int device_modify_mask,
struct ib_device_modify *device_modify)
{
/*
* Change dev props. Planned support is for node desc change and sys
* guid change only. This matches hfi1 and qib behavior. Other drivers
* that support existing modifications will need to add their support.
*/
/*
* VT-DRIVER-API: node_desc_change()
* VT-DRIVER-API: sys_guid_change()
*/
return -EOPNOTSUPP;
}
/**
* rvt_query_port: Passes the query port call to the driver
* @ibdev: Verbs IB dev
* @port: port number
* @props: structure to hold returned properties
*
* Returns 0 on success
*/
static int rvt_query_port(struct ib_device *ibdev, u8 port,
struct ib_port_attr *props)
{
/*
* VT-DRIVER-API: query_port_state()
* driver returns pretty much everything in ib_port_attr
*/
return -EOPNOTSUPP;
}
/**
* rvt_modify_port
* @ibdev: Verbs IB dev
* @port: Port number
* @port_modify_mask: How to change the port
* @props: Structure to fill in
*
* Returns 0 on success
*/
static int rvt_modify_port(struct ib_device *ibdev, u8 port,
int port_modify_mask, struct ib_port_modify *props)
{
/*
* VT-DRIVER-API: set_link_state()
* driver will set the link state using the IB enumeration
*
* VT-DRIVER-API: clear_qkey_violations()
* clears driver private qkey counter
*
* VT-DRIVER-API: get_lid()
* driver needs to return the LID
*
* TBD: send_trap() and post_mad_send() need examined to see where they
* fit in.
*/
return -EOPNOTSUPP;
}
/**
* rvt_query_pkey - Return a pkey from the table at a given index
* @ibdev: Verbs IB dev
* @port: Port number
* @intex: Index into pkey table
*
* Returns 0 on failure pkey otherwise
*/
static int rvt_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
u16 *pkey)
{
/*
* Driver will be responsible for keeping rvt_dev_info.pkey_table up to
* date. This function will just return that value. There is no need to
* lock, if a stale value is read and sent to the user so be it there is
* no way to protect against that anyway.
*/
return 0;
}
/*
* Check driver override. If driver passes a value use it, otherwise we use our
* own value.
*/
#define CHECK_DRIVER_OVERRIDE(rdi, x) \
rdi->ibdev.x = rdi->ibdev.x ? : rvt_ ##x
int rvt_register_device(struct rvt_dev_info *rdi)
{
if (!rdi)
return -EINVAL;
/* Dev Ops */
CHECK_DRIVER_OVERRIDE(rdi, query_device);
CHECK_DRIVER_OVERRIDE(rdi, modify_device);
CHECK_DRIVER_OVERRIDE(rdi, query_port);
CHECK_DRIVER_OVERRIDE(rdi, modify_port);
CHECK_DRIVER_OVERRIDE(rdi, query_pkey);
/* DMA Operations */
rdi->ibdev.dma_ops =
rdi->ibdev.dma_ops ? : &rvt_default_dma_mapping_ops;
/* Protection Domain */
CHECK_DRIVER_OVERRIDE(rdi, alloc_pd);
CHECK_DRIVER_OVERRIDE(rdi, dealloc_pd);
spin_lock_init(&rdi->n_pds_lock);
rdi->n_pds_allocated = 0;
/* We are now good to announce we exist */
return ib_register_device(&rdi->ibdev, rdi->port_callback);
}
EXPORT_SYMBOL(rvt_register_device);
void rvt_unregister_device(struct rvt_dev_info *rdi)
{
if (!rdi)
return;
ib_unregister_device(&rdi->ibdev);
}
EXPORT_SYMBOL(rvt_unregister_device);
|
