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 <linux/slab.h> 35 #include <linux/export.h> 36 #include <linux/errno.h> 37 38 #include "mlx4.h" 39 40 struct mlx4_device_context { 41 struct list_head list; 42 struct list_head bond_list; 43 struct mlx4_interface *intf; 44 void *context; 45 }; 46 47 static LIST_HEAD(intf_list); 48 static LIST_HEAD(dev_list); 49 static DEFINE_MUTEX(intf_mutex); 50 51 static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv) 52 { 53 struct mlx4_device_context *dev_ctx; 54 55 dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL); 56 if (!dev_ctx) 57 return; 58 59 dev_ctx->intf = intf; 60 dev_ctx->context = intf->add(&priv->dev); 61 62 if (dev_ctx->context) { 63 spin_lock_irq(&priv->ctx_lock); 64 list_add_tail(&dev_ctx->list, &priv->ctx_list); 65 spin_unlock_irq(&priv->ctx_lock); 66 } else 67 kfree(dev_ctx); 68 } 69 70 static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv) 71 { 72 struct mlx4_device_context *dev_ctx; 73 74 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 75 if (dev_ctx->intf == intf) { 76 spin_lock_irq(&priv->ctx_lock); 77 list_del(&dev_ctx->list); 78 spin_unlock_irq(&priv->ctx_lock); 79 80 intf->remove(&priv->dev, dev_ctx->context); 81 kfree(dev_ctx); 82 return; 83 } 84 } 85 86 int mlx4_register_interface(struct mlx4_interface *intf) 87 { 88 struct mlx4_priv *priv; 89 90 if (!intf->add || !intf->remove) 91 return -EINVAL; 92 93 mutex_lock(&intf_mutex); 94 95 list_add_tail(&intf->list, &intf_list); 96 list_for_each_entry(priv, &dev_list, dev_list) 97 mlx4_add_device(intf, priv); 98 99 mutex_unlock(&intf_mutex); 100 101 return 0; 102 } 103 EXPORT_SYMBOL_GPL(mlx4_register_interface); 104 105 void mlx4_unregister_interface(struct mlx4_interface *intf) 106 { 107 struct mlx4_priv *priv; 108 109 mutex_lock(&intf_mutex); 110 111 list_for_each_entry(priv, &dev_list, dev_list) 112 mlx4_remove_device(intf, priv); 113 114 list_del(&intf->list); 115 116 mutex_unlock(&intf_mutex); 117 } 118 EXPORT_SYMBOL_GPL(mlx4_unregister_interface); 119 120 int mlx4_do_bond(struct mlx4_dev *dev, bool enable) 121 { 122 struct mlx4_priv *priv = mlx4_priv(dev); 123 struct mlx4_device_context *dev_ctx = NULL, *temp_dev_ctx; 124 unsigned long flags; 125 int ret; 126 LIST_HEAD(bond_list); 127 128 if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PORT_REMAP)) 129 return -ENOTSUPP; 130 131 ret = mlx4_disable_rx_port_check(dev, enable); 132 if (ret) { 133 mlx4_err(dev, "Fail to %s rx port check\n", 134 enable ? "enable" : "disable"); 135 return ret; 136 } 137 if (enable) { 138 dev->flags |= MLX4_FLAG_BONDED; 139 } else { 140 ret = mlx4_virt2phy_port_map(dev, 1, 2); 141 if (ret) { 142 mlx4_err(dev, "Fail to reset port map\n"); 143 return ret; 144 } 145 dev->flags &= ~MLX4_FLAG_BONDED; 146 } 147 148 spin_lock_irqsave(&priv->ctx_lock, flags); 149 list_for_each_entry_safe(dev_ctx, temp_dev_ctx, &priv->ctx_list, list) { 150 if (dev_ctx->intf->flags & MLX4_INTFF_BONDING) { 151 list_add_tail(&dev_ctx->bond_list, &bond_list); 152 list_del(&dev_ctx->list); 153 } 154 } 155 spin_unlock_irqrestore(&priv->ctx_lock, flags); 156 157 list_for_each_entry(dev_ctx, &bond_list, bond_list) { 158 dev_ctx->intf->remove(dev, dev_ctx->context); 159 dev_ctx->context = dev_ctx->intf->add(dev); 160 161 spin_lock_irqsave(&priv->ctx_lock, flags); 162 list_add_tail(&dev_ctx->list, &priv->ctx_list); 163 spin_unlock_irqrestore(&priv->ctx_lock, flags); 164 165 mlx4_dbg(dev, "Inrerface for protocol %d restarted with when bonded mode is %s\n", 166 dev_ctx->intf->protocol, enable ? 167 "enabled" : "disabled"); 168 } 169 return 0; 170 } 171 172 void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type, 173 unsigned long param) 174 { 175 struct mlx4_priv *priv = mlx4_priv(dev); 176 struct mlx4_device_context *dev_ctx; 177 unsigned long flags; 178 179 spin_lock_irqsave(&priv->ctx_lock, flags); 180 181 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 182 if (dev_ctx->intf->event) 183 dev_ctx->intf->event(dev, dev_ctx->context, type, param); 184 185 spin_unlock_irqrestore(&priv->ctx_lock, flags); 186 } 187 188 int mlx4_register_device(struct mlx4_dev *dev) 189 { 190 struct mlx4_priv *priv = mlx4_priv(dev); 191 struct mlx4_interface *intf; 192 193 mutex_lock(&intf_mutex); 194 195 dev->persist->interface_state |= MLX4_INTERFACE_STATE_UP; 196 list_add_tail(&priv->dev_list, &dev_list); 197 list_for_each_entry(intf, &intf_list, list) 198 mlx4_add_device(intf, priv); 199 200 mutex_unlock(&intf_mutex); 201 mlx4_start_catas_poll(dev); 202 203 return 0; 204 } 205 206 void mlx4_unregister_device(struct mlx4_dev *dev) 207 { 208 struct mlx4_priv *priv = mlx4_priv(dev); 209 struct mlx4_interface *intf; 210 211 mlx4_stop_catas_poll(dev); 212 mutex_lock(&intf_mutex); 213 214 list_for_each_entry(intf, &intf_list, list) 215 mlx4_remove_device(intf, priv); 216 217 list_del(&priv->dev_list); 218 dev->persist->interface_state &= ~MLX4_INTERFACE_STATE_UP; 219 220 mutex_unlock(&intf_mutex); 221 } 222 223 void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port) 224 { 225 struct mlx4_priv *priv = mlx4_priv(dev); 226 struct mlx4_device_context *dev_ctx; 227 unsigned long flags; 228 void *result = NULL; 229 230 spin_lock_irqsave(&priv->ctx_lock, flags); 231 232 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 233 if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) { 234 result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port); 235 break; 236 } 237 238 spin_unlock_irqrestore(&priv->ctx_lock, flags); 239 240 return result; 241 } 242 EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev); 243