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 33#include <linux/mlx4/driver.h> 34 35#include "mlx4.h" 36 37struct mlx4_device_context { 38 struct list_head list; 39 struct mlx4_interface *intf; 40 void *context; 41}; 42 43static LIST_HEAD(intf_list); 44static LIST_HEAD(dev_list); 45static DEFINE_MUTEX(intf_mutex); 46 47static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv) 48{ 49 struct mlx4_device_context *dev_ctx; 50 51 dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL); 52 if (!dev_ctx) 53 return; 54 55 dev_ctx->intf = intf; 56 dev_ctx->context = intf->add(&priv->dev); 57 58 if (dev_ctx->context) { 59 spin_lock_irq(&priv->ctx_lock); 60 list_add_tail(&dev_ctx->list, &priv->ctx_list); 61 spin_unlock_irq(&priv->ctx_lock); 62 } else 63 kfree(dev_ctx); 64} 65 66static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv) 67{ 68 struct mlx4_device_context *dev_ctx; 69 70 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 71 if (dev_ctx->intf == intf) { 72 spin_lock_irq(&priv->ctx_lock); 73 list_del(&dev_ctx->list); 74 spin_unlock_irq(&priv->ctx_lock); 75 76 intf->remove(&priv->dev, dev_ctx->context); 77 kfree(dev_ctx); 78 return; 79 } 80} 81 82int mlx4_register_interface(struct mlx4_interface *intf) 83{ 84 struct mlx4_priv *priv; 85 86 if (!intf->add || !intf->remove) 87 return -EINVAL; 88 89 mutex_lock(&intf_mutex); 90 91 list_add_tail(&intf->list, &intf_list); 92 list_for_each_entry(priv, &dev_list, dev_list) 93 mlx4_add_device(intf, priv); 94 95 mutex_unlock(&intf_mutex); 96 97 return 0; 98} 99EXPORT_SYMBOL_GPL(mlx4_register_interface); 100 101void mlx4_unregister_interface(struct mlx4_interface *intf) 102{ 103 struct mlx4_priv *priv; 104 105 mutex_lock(&intf_mutex); 106 107 list_for_each_entry(priv, &dev_list, dev_list) 108 mlx4_remove_device(intf, priv); 109 110 list_del(&intf->list); 111 112 mutex_unlock(&intf_mutex); 113} 114EXPORT_SYMBOL_GPL(mlx4_unregister_interface); 115 116void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_event type, 117 int subtype, int port) 118{ 119 struct mlx4_priv *priv = mlx4_priv(dev); 120 struct mlx4_device_context *dev_ctx; 121 unsigned long flags; 122 123 spin_lock_irqsave(&priv->ctx_lock, flags); 124 125 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 126 if (dev_ctx->intf->event) 127 dev_ctx->intf->event(dev, dev_ctx->context, type, 128 subtype, port); 129 130 spin_unlock_irqrestore(&priv->ctx_lock, flags); 131} 132 133int mlx4_register_device(struct mlx4_dev *dev) 134{ 135 struct mlx4_priv *priv = mlx4_priv(dev); 136 struct mlx4_interface *intf; 137 138 mutex_lock(&intf_mutex); 139 140 list_add_tail(&priv->dev_list, &dev_list); 141 list_for_each_entry(intf, &intf_list, list) 142 mlx4_add_device(intf, priv); 143 144 mutex_unlock(&intf_mutex); 145 146 return 0; 147} 148 149void mlx4_unregister_device(struct mlx4_dev *dev) 150{ 151 struct mlx4_priv *priv = mlx4_priv(dev); 152 struct mlx4_interface *intf; 153 154 mutex_lock(&intf_mutex); 155 156 list_for_each_entry(intf, &intf_list, list) 157 mlx4_remove_device(intf, priv); 158 159 list_del(&priv->dev_list); 160 161 mutex_unlock(&intf_mutex); 162} 163