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225c7b1f RD |
1 | /* |
2 | * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
225c7b1f RD |
33 | #include "mlx4.h" |
34 | ||
35 | struct mlx4_device_context { | |
36 | struct list_head list; | |
37 | struct mlx4_interface *intf; | |
38 | void *context; | |
39 | }; | |
40 | ||
41 | static LIST_HEAD(intf_list); | |
42 | static LIST_HEAD(dev_list); | |
43 | static DEFINE_MUTEX(intf_mutex); | |
44 | ||
45 | static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv) | |
46 | { | |
47 | struct mlx4_device_context *dev_ctx; | |
48 | ||
49 | dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL); | |
50 | if (!dev_ctx) | |
51 | return; | |
52 | ||
53 | dev_ctx->intf = intf; | |
54 | dev_ctx->context = intf->add(&priv->dev); | |
55 | ||
56 | if (dev_ctx->context) { | |
57 | spin_lock_irq(&priv->ctx_lock); | |
58 | list_add_tail(&dev_ctx->list, &priv->ctx_list); | |
59 | spin_unlock_irq(&priv->ctx_lock); | |
60 | } else | |
61 | kfree(dev_ctx); | |
62 | } | |
63 | ||
64 | static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv) | |
65 | { | |
66 | struct mlx4_device_context *dev_ctx; | |
67 | ||
68 | list_for_each_entry(dev_ctx, &priv->ctx_list, list) | |
69 | if (dev_ctx->intf == intf) { | |
70 | spin_lock_irq(&priv->ctx_lock); | |
71 | list_del(&dev_ctx->list); | |
72 | spin_unlock_irq(&priv->ctx_lock); | |
73 | ||
74 | intf->remove(&priv->dev, dev_ctx->context); | |
75 | kfree(dev_ctx); | |
76 | return; | |
77 | } | |
78 | } | |
79 | ||
80 | int mlx4_register_interface(struct mlx4_interface *intf) | |
81 | { | |
82 | struct mlx4_priv *priv; | |
83 | ||
84 | if (!intf->add || !intf->remove) | |
85 | return -EINVAL; | |
86 | ||
87 | mutex_lock(&intf_mutex); | |
88 | ||
89 | list_add_tail(&intf->list, &intf_list); | |
90 | list_for_each_entry(priv, &dev_list, dev_list) | |
91 | mlx4_add_device(intf, priv); | |
92 | ||
93 | mutex_unlock(&intf_mutex); | |
94 | ||
95 | return 0; | |
96 | } | |
97 | EXPORT_SYMBOL_GPL(mlx4_register_interface); | |
98 | ||
99 | void mlx4_unregister_interface(struct mlx4_interface *intf) | |
100 | { | |
101 | struct mlx4_priv *priv; | |
102 | ||
103 | mutex_lock(&intf_mutex); | |
104 | ||
105 | list_for_each_entry(priv, &dev_list, dev_list) | |
106 | mlx4_remove_device(intf, priv); | |
107 | ||
108 | list_del(&intf->list); | |
109 | ||
110 | mutex_unlock(&intf_mutex); | |
111 | } | |
112 | EXPORT_SYMBOL_GPL(mlx4_unregister_interface); | |
113 | ||
37608eea | 114 | void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type, int port) |
225c7b1f RD |
115 | { |
116 | struct mlx4_priv *priv = mlx4_priv(dev); | |
117 | struct mlx4_device_context *dev_ctx; | |
118 | unsigned long flags; | |
119 | ||
120 | spin_lock_irqsave(&priv->ctx_lock, flags); | |
121 | ||
122 | list_for_each_entry(dev_ctx, &priv->ctx_list, list) | |
123 | if (dev_ctx->intf->event) | |
37608eea | 124 | dev_ctx->intf->event(dev, dev_ctx->context, type, port); |
225c7b1f RD |
125 | |
126 | spin_unlock_irqrestore(&priv->ctx_lock, flags); | |
127 | } | |
128 | ||
129 | int mlx4_register_device(struct mlx4_dev *dev) | |
130 | { | |
131 | struct mlx4_priv *priv = mlx4_priv(dev); | |
132 | struct mlx4_interface *intf; | |
133 | ||
225c7b1f RD |
134 | mutex_lock(&intf_mutex); |
135 | ||
136 | list_add_tail(&priv->dev_list, &dev_list); | |
137 | list_for_each_entry(intf, &intf_list, list) | |
138 | mlx4_add_device(intf, priv); | |
139 | ||
140 | mutex_unlock(&intf_mutex); | |
ee49bd93 | 141 | mlx4_start_catas_poll(dev); |
225c7b1f RD |
142 | |
143 | return 0; | |
144 | } | |
145 | ||
146 | void mlx4_unregister_device(struct mlx4_dev *dev) | |
147 | { | |
148 | struct mlx4_priv *priv = mlx4_priv(dev); | |
149 | struct mlx4_interface *intf; | |
150 | ||
ee49bd93 | 151 | mlx4_stop_catas_poll(dev); |
225c7b1f RD |
152 | mutex_lock(&intf_mutex); |
153 | ||
154 | list_for_each_entry(intf, &intf_list, list) | |
155 | mlx4_remove_device(intf, priv); | |
156 | ||
157 | list_del(&priv->dev_list); | |
158 | ||
159 | mutex_unlock(&intf_mutex); | |
160 | } |