1/* 2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. 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 34#include "mlx4.h" 35 36struct mlx4_device_context { 37 struct list_head list; 38 struct mlx4_interface *intf; 39 void *context; 40}; 41 42static LIST_HEAD(intf_list); 43static LIST_HEAD(dev_list); 44static DEFINE_MUTEX(intf_mutex); 45 46static 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 65static 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 81int 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} 98EXPORT_SYMBOL_GPL(mlx4_register_interface); 99 100void 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} 113EXPORT_SYMBOL_GPL(mlx4_unregister_interface); 114 115struct mlx4_dev *mlx4_query_interface(void *int_dev, int *port) 116{ 117 struct mlx4_priv *priv; 118 struct mlx4_device_context *dev_ctx; 119 enum mlx4_query_reply r; 120 unsigned long flags; 121 122 mutex_lock(&intf_mutex); 123 124 list_for_each_entry(priv, &dev_list, dev_list) { 125 spin_lock_irqsave(&priv->ctx_lock, flags); 126 list_for_each_entry(dev_ctx, &priv->ctx_list, list) { 127 if (!dev_ctx->intf->query) 128 continue; 129 r = dev_ctx->intf->query(dev_ctx->context, int_dev); 130 if (r != MLX4_QUERY_NOT_MINE) { 131 *port = r; 132 spin_unlock_irqrestore(&priv->ctx_lock, flags); 133 mutex_unlock(&intf_mutex); 134 return &priv->dev; 135 } 136 } 137 spin_unlock_irqrestore(&priv->ctx_lock, flags); 138 } 139 140 mutex_unlock(&intf_mutex); 141 return NULL; 142} 143EXPORT_SYMBOL_GPL(mlx4_query_interface); 144 145void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type, int port) 146{ 147 struct mlx4_priv *priv = mlx4_priv(dev); 148 struct mlx4_device_context *dev_ctx; 149 unsigned long flags; 150 151 spin_lock_irqsave(&priv->ctx_lock, flags); 152 153 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 154 if (dev_ctx->intf->event) 155 dev_ctx->intf->event(dev, dev_ctx->context, type, port); 156 157 spin_unlock_irqrestore(&priv->ctx_lock, flags); 158} 159 160int mlx4_register_device(struct mlx4_dev *dev) 161{ 162 struct mlx4_priv *priv = mlx4_priv(dev); 163 struct mlx4_interface *intf; 164 165 mutex_lock(&intf_mutex); 166 167 list_add_tail(&priv->dev_list, &dev_list); 168 list_for_each_entry(intf, &intf_list, list) 169 mlx4_add_device(intf, priv); 170 171 mutex_unlock(&intf_mutex); 172 mlx4_start_catas_poll(dev); 173 174 return 0; 175} 176 177void mlx4_unregister_device(struct mlx4_dev *dev) 178{ 179 struct mlx4_priv *priv = mlx4_priv(dev); 180 struct mlx4_interface *intf; 181 182 mlx4_stop_catas_poll(dev); 183 mutex_lock(&intf_mutex); 184 185 list_for_each_entry(intf, &intf_list, list) 186 mlx4_remove_device(intf, priv); 187 188 list_del(&priv->dev_list); 189 190 mutex_unlock(&intf_mutex); 191} 192 193void *mlx4_find_get_prot_dev(struct mlx4_dev *dev, enum mlx4_prot proto, int port) 194{ 195 struct mlx4_priv *priv = mlx4_priv(dev); 196 struct mlx4_device_context *dev_ctx; 197 unsigned long flags; 198 void *result = NULL; 199 200 spin_lock_irqsave(&priv->ctx_lock, flags); 201 202 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 203 if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_prot_dev) { 204 result = dev_ctx->intf->get_prot_dev(dev, dev_ctx->context, port); 205 break; 206 } 207 208 spin_unlock_irqrestore(&priv->ctx_lock, flags); 209 210 return result; 211} 212 213