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/*
* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mellanox Technologies. 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/slab.h>
#include <linux/export.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_dev_event type, 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, 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);
}
void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port)
{
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_device_context *dev_ctx;
unsigned long flags;
void *result = NULL;
spin_lock_irqsave(&priv->ctx_lock, flags);
list_for_each_entry(dev_ctx, &priv->ctx_list, list)
if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) {
result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port);
break;
}
spin_unlock_irqrestore(&priv->ctx_lock, flags);
return result;
}
EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev);
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