1 /*
2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include "mlx4.h"
35
36 struct mlx4_device_context {
37 struct list_head list;
38 struct mlx4_interface *intf;
39 void *context;
40 };
41
42 static LIST_HEAD(intf_list);
43 static LIST_HEAD(dev_list);
44 static DEFINE_MUTEX(intf_mutex);
45
46 static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
47 {
48 struct mlx4_device_context *dev_ctx;
49
50 dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL);
51 if (!dev_ctx)
52 return;
53
54 dev_ctx->intf = intf;
55 dev_ctx->context = intf->add(&priv->dev);
56
57 if (dev_ctx->context) {
58 spin_lock_irq(&priv->ctx_lock);
59 list_add_tail(&dev_ctx->list, &priv->ctx_list);
60 spin_unlock_irq(&priv->ctx_lock);
61 } else
62 kfree(dev_ctx);
63 }
64
65 static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
66 {
67 struct mlx4_device_context *dev_ctx;
68
69 list_for_each_entry(dev_ctx, &priv->ctx_list, list)
70 if (dev_ctx->intf == intf) {
71 spin_lock_irq(&priv->ctx_lock);
72 list_del(&dev_ctx->list);
73 spin_unlock_irq(&priv->ctx_lock);
74
75 intf->remove(&priv->dev, dev_ctx->context);
76 kfree(dev_ctx);
77 return;
78 }
79 }
80
81 int mlx4_register_interface(struct mlx4_interface *intf)
82 {
83 struct mlx4_priv *priv;
84
85 if (!intf->add || !intf->remove)
86 return -EINVAL;
87
88 mutex_lock(&intf_mutex);
89
90 list_add_tail(&intf->list, &intf_list);
91 list_for_each_entry(priv, &dev_list, dev_list)
92 mlx4_add_device(intf, priv);
93
94 mutex_unlock(&intf_mutex);
95
96 return 0;
97 }
98 EXPORT_SYMBOL_GPL(mlx4_register_interface);
99
100 void mlx4_unregister_interface(struct mlx4_interface *intf)
101 {
102 struct mlx4_priv *priv;
103
104 mutex_lock(&intf_mutex);
105
106 list_for_each_entry(priv, &dev_list, dev_list)
107 mlx4_remove_device(intf, priv);
108
109 list_del(&intf->list);
110
111 mutex_unlock(&intf_mutex);
112 }
113 EXPORT_SYMBOL_GPL(mlx4_unregister_interface);
114
115 void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type, int port)
116 {
117 struct mlx4_priv *priv = mlx4_priv(dev);
118 struct mlx4_device_context *dev_ctx;
119 unsigned long flags;
120
121 spin_lock_irqsave(&priv->ctx_lock, flags);
122
123 list_for_each_entry(dev_ctx, &priv->ctx_list, list)
124 if (dev_ctx->intf->event)
125 dev_ctx->intf->event(dev, dev_ctx->context, type, port);
126
127 spin_unlock_irqrestore(&priv->ctx_lock, flags);
128 }
129
130 int mlx4_register_device(struct mlx4_dev *dev)
131 {
132 struct mlx4_priv *priv = mlx4_priv(dev);
133 struct mlx4_interface *intf;
134
135 mutex_lock(&intf_mutex);
136
137 list_add_tail(&priv->dev_list, &dev_list);
138 list_for_each_entry(intf, &intf_list, list)
139 mlx4_add_device(intf, priv);
140
141 mutex_unlock(&intf_mutex);
142 mlx4_start_catas_poll(dev);
143
144 return 0;
145 }
146
147 void mlx4_unregister_device(struct mlx4_dev *dev)
148 {
149 struct mlx4_priv *priv = mlx4_priv(dev);
150 struct mlx4_interface *intf;
151
152 mlx4_stop_catas_poll(dev);
153 mutex_lock(&intf_mutex);
154
155 list_for_each_entry(intf, &intf_list, list)
156 mlx4_remove_device(intf, priv);
157
158 list_del(&priv->dev_list);
159
160 mutex_unlock(&intf_mutex);
161 }
162
|
This page was automatically generated by the
LXR engine.
|