/*
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* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/slab.h>
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#include <linux/export.h>
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#include <linux/errno.h>
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#include <net/devlink.h>
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#include "mlx4.h"
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struct mlx4_device_context {
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struct list_head list;
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struct list_head bond_list;
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struct mlx4_interface *intf;
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void *context;
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};
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static LIST_HEAD(intf_list);
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static LIST_HEAD(dev_list);
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static DEFINE_MUTEX(intf_mutex);
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static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
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{
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struct mlx4_device_context *dev_ctx;
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dev_ctx = kmalloc(sizeof(*dev_ctx), GFP_KERNEL);
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if (!dev_ctx)
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return;
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dev_ctx->intf = intf;
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dev_ctx->context = intf->add(&priv->dev);
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if (dev_ctx->context) {
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spin_lock_irq(&priv->ctx_lock);
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list_add_tail(&dev_ctx->list, &priv->ctx_list);
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spin_unlock_irq(&priv->ctx_lock);
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if (intf->activate)
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intf->activate(&priv->dev, dev_ctx->context);
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} else
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kfree(dev_ctx);
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}
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static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
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{
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struct mlx4_device_context *dev_ctx;
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list_for_each_entry(dev_ctx, &priv->ctx_list, list)
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if (dev_ctx->intf == intf) {
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spin_lock_irq(&priv->ctx_lock);
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list_del(&dev_ctx->list);
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spin_unlock_irq(&priv->ctx_lock);
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intf->remove(&priv->dev, dev_ctx->context);
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kfree(dev_ctx);
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return;
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}
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}
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int mlx4_register_interface(struct mlx4_interface *intf)
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{
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struct mlx4_priv *priv;
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if (!intf->add || !intf->remove)
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return -EINVAL;
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mutex_lock(&intf_mutex);
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list_add_tail(&intf->list, &intf_list);
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list_for_each_entry(priv, &dev_list, dev_list) {
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if (mlx4_is_mfunc(&priv->dev) && (intf->flags & MLX4_INTFF_BONDING)) {
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mlx4_dbg(&priv->dev,
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"SRIOV, disabling HA mode for intf proto %d\n", intf->protocol);
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intf->flags &= ~MLX4_INTFF_BONDING;
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}
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mlx4_add_device(intf, priv);
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}
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mutex_unlock(&intf_mutex);
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return 0;
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}
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EXPORT_SYMBOL_GPL(mlx4_register_interface);
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void mlx4_unregister_interface(struct mlx4_interface *intf)
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{
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struct mlx4_priv *priv;
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mutex_lock(&intf_mutex);
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list_for_each_entry(priv, &dev_list, dev_list)
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mlx4_remove_device(intf, priv);
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list_del(&intf->list);
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mutex_unlock(&intf_mutex);
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}
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EXPORT_SYMBOL_GPL(mlx4_unregister_interface);
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int mlx4_do_bond(struct mlx4_dev *dev, bool enable)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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struct mlx4_device_context *dev_ctx = NULL, *temp_dev_ctx;
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unsigned long flags;
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int ret;
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LIST_HEAD(bond_list);
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if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PORT_REMAP))
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return -EOPNOTSUPP;
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ret = mlx4_disable_rx_port_check(dev, enable);
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if (ret) {
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mlx4_err(dev, "Fail to %s rx port check\n",
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enable ? "enable" : "disable");
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return ret;
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}
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if (enable) {
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dev->flags |= MLX4_FLAG_BONDED;
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} else {
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ret = mlx4_virt2phy_port_map(dev, 1, 2);
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if (ret) {
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mlx4_err(dev, "Fail to reset port map\n");
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return ret;
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}
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dev->flags &= ~MLX4_FLAG_BONDED;
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}
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spin_lock_irqsave(&priv->ctx_lock, flags);
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list_for_each_entry_safe(dev_ctx, temp_dev_ctx, &priv->ctx_list, list) {
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if (dev_ctx->intf->flags & MLX4_INTFF_BONDING) {
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list_add_tail(&dev_ctx->bond_list, &bond_list);
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list_del(&dev_ctx->list);
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}
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}
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spin_unlock_irqrestore(&priv->ctx_lock, flags);
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list_for_each_entry(dev_ctx, &bond_list, bond_list) {
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dev_ctx->intf->remove(dev, dev_ctx->context);
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dev_ctx->context = dev_ctx->intf->add(dev);
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spin_lock_irqsave(&priv->ctx_lock, flags);
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list_add_tail(&dev_ctx->list, &priv->ctx_list);
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spin_unlock_irqrestore(&priv->ctx_lock, flags);
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mlx4_dbg(dev, "Interface for protocol %d restarted with bonded mode %s\n",
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dev_ctx->intf->protocol, enable ?
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"enabled" : "disabled");
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}
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return 0;
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}
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void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
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unsigned long param)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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struct mlx4_device_context *dev_ctx;
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unsigned long flags;
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spin_lock_irqsave(&priv->ctx_lock, flags);
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list_for_each_entry(dev_ctx, &priv->ctx_list, list)
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if (dev_ctx->intf->event)
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dev_ctx->intf->event(dev, dev_ctx->context, type, param);
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spin_unlock_irqrestore(&priv->ctx_lock, flags);
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}
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int mlx4_register_device(struct mlx4_dev *dev)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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struct mlx4_interface *intf;
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mutex_lock(&intf_mutex);
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dev->persist->interface_state |= MLX4_INTERFACE_STATE_UP;
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list_add_tail(&priv->dev_list, &dev_list);
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list_for_each_entry(intf, &intf_list, list)
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mlx4_add_device(intf, priv);
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mutex_unlock(&intf_mutex);
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mlx4_start_catas_poll(dev);
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return 0;
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}
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void mlx4_unregister_device(struct mlx4_dev *dev)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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struct mlx4_interface *intf;
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if (!(dev->persist->interface_state & MLX4_INTERFACE_STATE_UP))
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return;
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mlx4_stop_catas_poll(dev);
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if (dev->persist->interface_state & MLX4_INTERFACE_STATE_DELETION &&
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mlx4_is_slave(dev)) {
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/* In mlx4_remove_one on a VF */
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u32 slave_read =
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swab32(readl(&mlx4_priv(dev)->mfunc.comm->slave_read));
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if (mlx4_comm_internal_err(slave_read)) {
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mlx4_dbg(dev, "%s: comm channel is down, entering error state.\n",
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__func__);
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mlx4_enter_error_state(dev->persist);
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}
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}
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mutex_lock(&intf_mutex);
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list_for_each_entry(intf, &intf_list, list)
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mlx4_remove_device(intf, priv);
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list_del(&priv->dev_list);
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dev->persist->interface_state &= ~MLX4_INTERFACE_STATE_UP;
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mutex_unlock(&intf_mutex);
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}
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void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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struct mlx4_device_context *dev_ctx;
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unsigned long flags;
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void *result = NULL;
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spin_lock_irqsave(&priv->ctx_lock, flags);
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list_for_each_entry(dev_ctx, &priv->ctx_list, list)
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if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) {
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result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port);
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break;
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}
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spin_unlock_irqrestore(&priv->ctx_lock, flags);
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return result;
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}
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EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev);
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struct devlink_port *mlx4_get_devlink_port(struct mlx4_dev *dev, int port)
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{
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struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
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return &info->devlink_port;
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}
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EXPORT_SYMBOL_GPL(mlx4_get_devlink_port);
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