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225c7b1f RD |
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 | ||
5a0e3ad6 | 34 | #include <linux/slab.h> |
ee40fa06 | 35 | #include <linux/export.h> |
5a0e3ad6 | 36 | |
225c7b1f RD |
37 | #include "mlx4.h" |
38 | ||
39 | struct mlx4_device_context { | |
40 | struct list_head list; | |
41 | struct mlx4_interface *intf; | |
42 | void *context; | |
43 | }; | |
44 | ||
45 | static LIST_HEAD(intf_list); | |
46 | static LIST_HEAD(dev_list); | |
47 | static DEFINE_MUTEX(intf_mutex); | |
48 | ||
49 | static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv) | |
50 | { | |
51 | struct mlx4_device_context *dev_ctx; | |
52 | ||
53 | dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL); | |
54 | if (!dev_ctx) | |
55 | return; | |
56 | ||
57 | dev_ctx->intf = intf; | |
58 | dev_ctx->context = intf->add(&priv->dev); | |
59 | ||
60 | if (dev_ctx->context) { | |
61 | spin_lock_irq(&priv->ctx_lock); | |
62 | list_add_tail(&dev_ctx->list, &priv->ctx_list); | |
63 | spin_unlock_irq(&priv->ctx_lock); | |
64 | } else | |
65 | kfree(dev_ctx); | |
66 | } | |
67 | ||
68 | static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv) | |
69 | { | |
70 | struct mlx4_device_context *dev_ctx; | |
71 | ||
72 | list_for_each_entry(dev_ctx, &priv->ctx_list, list) | |
73 | if (dev_ctx->intf == intf) { | |
74 | spin_lock_irq(&priv->ctx_lock); | |
75 | list_del(&dev_ctx->list); | |
76 | spin_unlock_irq(&priv->ctx_lock); | |
77 | ||
78 | intf->remove(&priv->dev, dev_ctx->context); | |
79 | kfree(dev_ctx); | |
80 | return; | |
81 | } | |
82 | } | |
83 | ||
84 | int mlx4_register_interface(struct mlx4_interface *intf) | |
85 | { | |
86 | struct mlx4_priv *priv; | |
87 | ||
88 | if (!intf->add || !intf->remove) | |
89 | return -EINVAL; | |
90 | ||
91 | mutex_lock(&intf_mutex); | |
92 | ||
93 | list_add_tail(&intf->list, &intf_list); | |
94 | list_for_each_entry(priv, &dev_list, dev_list) | |
95 | mlx4_add_device(intf, priv); | |
96 | ||
97 | mutex_unlock(&intf_mutex); | |
98 | ||
99 | return 0; | |
100 | } | |
101 | EXPORT_SYMBOL_GPL(mlx4_register_interface); | |
102 | ||
103 | void mlx4_unregister_interface(struct mlx4_interface *intf) | |
104 | { | |
105 | struct mlx4_priv *priv; | |
106 | ||
107 | mutex_lock(&intf_mutex); | |
108 | ||
109 | list_for_each_entry(priv, &dev_list, dev_list) | |
110 | mlx4_remove_device(intf, priv); | |
111 | ||
112 | list_del(&intf->list); | |
113 | ||
114 | mutex_unlock(&intf_mutex); | |
115 | } | |
116 | EXPORT_SYMBOL_GPL(mlx4_unregister_interface); | |
117 | ||
00f5ce99 JM |
118 | void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type, |
119 | unsigned long param) | |
225c7b1f RD |
120 | { |
121 | struct mlx4_priv *priv = mlx4_priv(dev); | |
122 | struct mlx4_device_context *dev_ctx; | |
123 | unsigned long flags; | |
124 | ||
125 | spin_lock_irqsave(&priv->ctx_lock, flags); | |
126 | ||
127 | list_for_each_entry(dev_ctx, &priv->ctx_list, list) | |
128 | if (dev_ctx->intf->event) | |
00f5ce99 | 129 | dev_ctx->intf->event(dev, dev_ctx->context, type, param); |
225c7b1f RD |
130 | |
131 | spin_unlock_irqrestore(&priv->ctx_lock, flags); | |
132 | } | |
133 | ||
134 | int mlx4_register_device(struct mlx4_dev *dev) | |
135 | { | |
136 | struct mlx4_priv *priv = mlx4_priv(dev); | |
137 | struct mlx4_interface *intf; | |
138 | ||
225c7b1f RD |
139 | mutex_lock(&intf_mutex); |
140 | ||
141 | list_add_tail(&priv->dev_list, &dev_list); | |
142 | list_for_each_entry(intf, &intf_list, list) | |
143 | mlx4_add_device(intf, priv); | |
144 | ||
145 | mutex_unlock(&intf_mutex); | |
d81c7186 JM |
146 | if (!mlx4_is_slave(dev)) |
147 | mlx4_start_catas_poll(dev); | |
225c7b1f RD |
148 | |
149 | return 0; | |
150 | } | |
151 | ||
152 | void mlx4_unregister_device(struct mlx4_dev *dev) | |
153 | { | |
154 | struct mlx4_priv *priv = mlx4_priv(dev); | |
155 | struct mlx4_interface *intf; | |
156 | ||
d81c7186 JM |
157 | if (!mlx4_is_slave(dev)) |
158 | mlx4_stop_catas_poll(dev); | |
225c7b1f RD |
159 | mutex_lock(&intf_mutex); |
160 | ||
161 | list_for_each_entry(intf, &intf_list, list) | |
162 | mlx4_remove_device(intf, priv); | |
163 | ||
164 | list_del(&priv->dev_list); | |
165 | ||
166 | mutex_unlock(&intf_mutex); | |
167 | } | |
33c87f0a EC |
168 | |
169 | void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port) | |
170 | { | |
171 | struct mlx4_priv *priv = mlx4_priv(dev); | |
172 | struct mlx4_device_context *dev_ctx; | |
173 | unsigned long flags; | |
174 | void *result = NULL; | |
175 | ||
176 | spin_lock_irqsave(&priv->ctx_lock, flags); | |
177 | ||
178 | list_for_each_entry(dev_ctx, &priv->ctx_list, list) | |
179 | if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) { | |
180 | result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port); | |
181 | break; | |
182 | } | |
183 | ||
184 | spin_unlock_irqrestore(&priv->ctx_lock, flags); | |
185 | ||
186 | return result; | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev); |