/* * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <linux/mlx4/driver.h> #include "mlx4.h" struct mlx4_device_context { struct list_head list; struct mlx4_interface *intf; void *context; }; static LIST_HEAD(intf_list); static LIST_HEAD(dev_list); static DEFINE_MUTEX(intf_mutex); static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv) { struct mlx4_device_context *dev_ctx; dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL); if (!dev_ctx) return; dev_ctx->intf = intf; dev_ctx->context = intf->add(&priv->dev); if (dev_ctx->context) { spin_lock_irq(&priv->ctx_lock); list_add_tail(&dev_ctx->list, &priv->ctx_list); spin_unlock_irq(&priv->ctx_lock); } else kfree(dev_ctx); } static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv) { struct mlx4_device_context *dev_ctx; list_for_each_entry(dev_ctx, &priv->ctx_list, list) if (dev_ctx->intf == intf) { spin_lock_irq(&priv->ctx_lock); list_del(&dev_ctx->list); spin_unlock_irq(&priv->ctx_lock); intf->remove(&priv->dev, dev_ctx->context); kfree(dev_ctx); return; } } int mlx4_register_interface(struct mlx4_interface *intf) { struct mlx4_priv *priv; if (!intf->add || !intf->remove) return -EINVAL; mutex_lock(&intf_mutex); list_add_tail(&intf->list, &intf_list); list_for_each_entry(priv, &dev_list, dev_list) mlx4_add_device(intf, priv); mutex_unlock(&intf_mutex); return 0; } EXPORT_SYMBOL_GPL(mlx4_register_interface); void mlx4_unregister_interface(struct mlx4_interface *intf) { struct mlx4_priv *priv; mutex_lock(&intf_mutex); list_for_each_entry(priv, &dev_list, dev_list) mlx4_remove_device(intf, priv); list_del(&intf->list); mutex_unlock(&intf_mutex); } EXPORT_SYMBOL_GPL(mlx4_unregister_interface); void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_event type, int subtype, int port) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_device_context *dev_ctx; unsigned long flags; spin_lock_irqsave(&priv->ctx_lock, flags); list_for_each_entry(dev_ctx, &priv->ctx_list, list) if (dev_ctx->intf->event) dev_ctx->intf->event(dev, dev_ctx->context, type, subtype, port); spin_unlock_irqrestore(&priv->ctx_lock, flags); } int mlx4_register_device(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_interface *intf; mutex_lock(&intf_mutex); list_add_tail(&priv->dev_list, &dev_list); list_for_each_entry(intf, &intf_list, list) mlx4_add_device(intf, priv); mutex_unlock(&intf_mutex); mlx4_start_catas_poll(dev); return 0; } void mlx4_unregister_device(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_interface *intf; mlx4_stop_catas_poll(dev); mutex_lock(&intf_mutex); list_for_each_entry(intf, &intf_list, list) mlx4_remove_device(intf, priv); list_del(&priv->dev_list); mutex_unlock(&intf_mutex); }