2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/slab.h>
35 #include <linux/export.h>
39 struct mlx4_device_context {
40 struct list_head list;
41 struct mlx4_interface *intf;
45 static LIST_HEAD(intf_list);
46 static LIST_HEAD(dev_list);
47 static DEFINE_MUTEX(intf_mutex);
49 static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
51 struct mlx4_device_context *dev_ctx;
53 dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL);
58 dev_ctx->context = intf->add(&priv->dev);
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);
68 static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
70 struct mlx4_device_context *dev_ctx;
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);
78 intf->remove(&priv->dev, dev_ctx->context);
84 int mlx4_register_interface(struct mlx4_interface *intf)
86 struct mlx4_priv *priv;
88 if (!intf->add || !intf->remove)
91 mutex_lock(&intf_mutex);
93 list_add_tail(&intf->list, &intf_list);
94 list_for_each_entry(priv, &dev_list, dev_list)
95 mlx4_add_device(intf, priv);
97 mutex_unlock(&intf_mutex);
101 EXPORT_SYMBOL_GPL(mlx4_register_interface);
103 void mlx4_unregister_interface(struct mlx4_interface *intf)
105 struct mlx4_priv *priv;
107 mutex_lock(&intf_mutex);
109 list_for_each_entry(priv, &dev_list, dev_list)
110 mlx4_remove_device(intf, priv);
112 list_del(&intf->list);
114 mutex_unlock(&intf_mutex);
116 EXPORT_SYMBOL_GPL(mlx4_unregister_interface);
118 void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
121 struct mlx4_priv *priv = mlx4_priv(dev);
122 struct mlx4_device_context *dev_ctx;
125 spin_lock_irqsave(&priv->ctx_lock, flags);
127 list_for_each_entry(dev_ctx, &priv->ctx_list, list)
128 if (dev_ctx->intf->event)
129 dev_ctx->intf->event(dev, dev_ctx->context, type, param);
131 spin_unlock_irqrestore(&priv->ctx_lock, flags);
134 int mlx4_register_device(struct mlx4_dev *dev)
136 struct mlx4_priv *priv = mlx4_priv(dev);
137 struct mlx4_interface *intf;
139 mutex_lock(&intf_mutex);
141 dev->persist->interface_state |= MLX4_INTERFACE_STATE_UP;
142 list_add_tail(&priv->dev_list, &dev_list);
143 list_for_each_entry(intf, &intf_list, list)
144 mlx4_add_device(intf, priv);
146 mutex_unlock(&intf_mutex);
147 mlx4_start_catas_poll(dev);
152 void mlx4_unregister_device(struct mlx4_dev *dev)
154 struct mlx4_priv *priv = mlx4_priv(dev);
155 struct mlx4_interface *intf;
157 mlx4_stop_catas_poll(dev);
158 mutex_lock(&intf_mutex);
160 list_for_each_entry(intf, &intf_list, list)
161 mlx4_remove_device(intf, priv);
163 list_del(&priv->dev_list);
164 dev->persist->interface_state &= ~MLX4_INTERFACE_STATE_UP;
166 mutex_unlock(&intf_mutex);
169 void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port)
171 struct mlx4_priv *priv = mlx4_priv(dev);
172 struct mlx4_device_context *dev_ctx;
176 spin_lock_irqsave(&priv->ctx_lock, flags);
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);
184 spin_unlock_irqrestore(&priv->ctx_lock, flags);
188 EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev);