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
|
/*
* Copyright(c) 2016 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/slab.h>
#include "ah.h"
#include "vt.h" /* for prints */
/**
* rvt_check_ah - validate the attributes of AH
* @ibdev: the ib device
* @ah_attr: the attributes of the AH
*
* If driver supports a more detailed check_ah function call back to it
* otherwise just check the basics.
*
* Return: 0 on success
*/
int rvt_check_ah(struct ib_device *ibdev,
struct ib_ah_attr *ah_attr)
{
int err;
struct ib_port_attr port_attr;
struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
enum rdma_link_layer link = rdma_port_get_link_layer(ibdev,
ah_attr->port_num);
err = ib_query_port(ibdev, ah_attr->port_num, &port_attr);
if (err)
return -EINVAL;
if (ah_attr->port_num < 1 ||
ah_attr->port_num > ibdev->phys_port_cnt)
return -EINVAL;
if (ah_attr->static_rate != IB_RATE_PORT_CURRENT &&
ib_rate_to_mbps(ah_attr->static_rate) < 0)
return -EINVAL;
if ((ah_attr->ah_flags & IB_AH_GRH) &&
ah_attr->grh.sgid_index >= port_attr.gid_tbl_len)
return -EINVAL;
if (link != IB_LINK_LAYER_ETHERNET) {
if (ah_attr->dlid == 0)
return -EINVAL;
if (ah_attr->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) &&
ah_attr->dlid != be16_to_cpu(IB_LID_PERMISSIVE) &&
!(ah_attr->ah_flags & IB_AH_GRH))
return -EINVAL;
}
if (rdi->driver_f.check_ah)
return rdi->driver_f.check_ah(ibdev, ah_attr);
return 0;
}
EXPORT_SYMBOL(rvt_check_ah);
/**
* rvt_create_ah - create an address handle
* @pd: the protection domain
* @ah_attr: the attributes of the AH
*
* This may be called from interrupt context.
*
* Return: newly allocated ah
*/
struct ib_ah *rvt_create_ah(struct ib_pd *pd,
struct ib_ah_attr *ah_attr)
{
struct rvt_ah *ah;
struct rvt_dev_info *dev = ib_to_rvt(pd->device);
unsigned long flags;
if (rvt_check_ah(pd->device, ah_attr))
return ERR_PTR(-EINVAL);
ah = kmalloc(sizeof(*ah), GFP_ATOMIC);
if (!ah)
return ERR_PTR(-ENOMEM);
spin_lock_irqsave(&dev->n_ahs_lock, flags);
if (dev->n_ahs_allocated == dev->dparms.props.max_ah) {
spin_unlock(&dev->n_ahs_lock);
kfree(ah);
return ERR_PTR(-ENOMEM);
}
dev->n_ahs_allocated++;
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
ah->attr = *ah_attr;
atomic_set(&ah->refcount, 0);
if (dev->driver_f.notify_new_ah)
dev->driver_f.notify_new_ah(pd->device, ah_attr, ah);
return &ah->ibah;
}
/**
* rvt_destory_ah - Destory an address handle
* @ibah: address handle
*
* Return: 0 on success
*/
int rvt_destroy_ah(struct ib_ah *ibah)
{
struct rvt_dev_info *dev = ib_to_rvt(ibah->device);
struct rvt_ah *ah = ibah_to_rvtah(ibah);
unsigned long flags;
if (atomic_read(&ah->refcount) != 0)
return -EBUSY;
spin_lock_irqsave(&dev->n_ahs_lock, flags);
dev->n_ahs_allocated--;
spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
kfree(ah);
return 0;
}
/**
* rvt_modify_ah - modify an ah with given attrs
* @ibah: address handle to modify
* @ah_attr: attrs to apply
*
* Return: 0 on success
*/
int rvt_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
struct rvt_ah *ah = ibah_to_rvtah(ibah);
if (rvt_check_ah(ibah->device, ah_attr))
return -EINVAL;
ah->attr = *ah_attr;
return 0;
}
/**
* rvt_query_ah - return attrs for ah
* @ibah: address handle to query
* @ah_attr: return info in this
*
* Return: always 0
*/
int rvt_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
struct rvt_ah *ah = ibah_to_rvtah(ibah);
*ah_attr = ah->attr;
return 0;
}
|
