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
|
/*
* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/slab.h>
#include <linux/export.h>
#include "mlx4.h"
struct mlx4_device_context {
struct list_head list;
struct mlx4_interface *intf;
void *context;
};
static LIST_HEAD(intf_list);
static LIST_HEAD(dev_list);
static DEFINE_MUTEX(intf_mutex);
static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
{
struct mlx4_device_context *dev_ctx;
dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL);
if (!dev_ctx)
return;
dev_ctx->intf = intf;
dev_ctx->context = intf->add(&priv->dev);
if (dev_ctx->context) {
spin_lock_irq(&priv->ctx_lock);
list_add_tail(&dev_ctx->list, &priv->ctx_list);
spin_unlock_irq(&priv->ctx_lock);
} else
kfree(dev_ctx);
}
static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
{
struct mlx4_device_context *dev_ctx;
list_for_each_entry(dev_ctx, &priv->ctx_list, list)
if (dev_ctx->intf == intf) {
spin_lock_irq(&priv->ctx_lock);
list_del(&dev_ctx->list);
spin_unlock_irq(&priv->ctx_lock);
intf->remove(&priv->dev, dev_ctx->context);
kfree(dev_ctx);
return;
}
}
int mlx4_register_interface(struct mlx4_interface *intf)
{
struct mlx4_priv *priv;
if (!intf->add || !intf->remove)
return -EINVAL;
mutex_lock(&intf_mutex);
list_add_tail(&intf->list, &intf_list);
list_for_each_entry(priv, &dev_list, dev_list)
mlx4_add_device(intf, priv);
mutex_unlock(&intf_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(mlx4_register_interface);
void mlx4_unregister_interface(struct mlx4_interface *intf)
{
struct mlx4_priv *priv;
mutex_lock(&intf_mutex);
list_for_each_entry(priv, &dev_list, dev_list)
mlx4_remove_device(intf, priv);
list_del(&intf->list);
mutex_unlock(&intf_mutex);
}
EXPORT_SYMBOL_GPL(mlx4_unregister_interface);
void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
unsigned long param)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_device_context *dev_ctx;
unsigned long flags;
spin_lock_irqsave(&priv->ctx_lock, flags);
list_for_each_entry(dev_ctx, &priv->ctx_list, list)
if (dev_ctx->intf->event)
dev_ctx->intf->event(dev, dev_ctx->context, type, param);
spin_unlock_irqrestore(&priv->ctx_lock, flags);
}
int mlx4_register_device(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_interface *intf;
mutex_lock(&intf_mutex);
list_add_tail(&priv->dev_list, &dev_list);
list_for_each_entry(intf, &intf_list, list)
mlx4_add_device(intf, priv);
mutex_unlock(&intf_mutex);
if (!mlx4_is_slave(dev))
mlx4_start_catas_poll(dev);
return 0;
}
void mlx4_unregister_device(struct mlx4_dev *dev)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_interface *intf;
if (!mlx4_is_slave(dev))
mlx4_stop_catas_poll(dev);
mutex_lock(&intf_mutex);
list_for_each_entry(intf, &intf_list, list)
mlx4_remove_device(intf, priv);
list_del(&priv->dev_list);
mutex_unlock(&intf_mutex);
}
void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_device_context *dev_ctx;
unsigned long flags;
void *result = NULL;
spin_lock_irqsave(&priv->ctx_lock, flags);
list_for_each_entry(dev_ctx, &priv->ctx_list, list)
if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) {
result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port);
break;
}
spin_unlock_irqrestore(&priv->ctx_lock, flags);
return result;
}
EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev);
|
