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1 | /* |
2 | * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. | |
51a379d0 | 3 | * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. |
225c7b1f RD |
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 | ||
225c7b1f RD |
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 | ||
37608eea | 115 | void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type, int port) |
225c7b1f RD |
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) | |
37608eea | 125 | dev_ctx->intf->event(dev, dev_ctx->context, type, port); |
225c7b1f RD |
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 | ||
225c7b1f RD |
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); | |
ee49bd93 | 142 | mlx4_start_catas_poll(dev); |
225c7b1f RD |
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 | ||
ee49bd93 | 152 | mlx4_stop_catas_poll(dev); |
225c7b1f RD |
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 | } |