/*
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* Copyright (c) 2007 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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*/
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#include <linux/errno.h>
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#include <linux/if_ether.h>
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#include <linux/mlx4/cmd.h>
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#include "mlx4.h"
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int mlx4_SENSE_PORT(struct mlx4_dev *dev, int port,
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enum mlx4_port_type *type)
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{
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u64 out_param;
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int err = 0;
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err = mlx4_cmd_imm(dev, 0, &out_param, port, 0,
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MLX4_CMD_SENSE_PORT, MLX4_CMD_TIME_CLASS_B,
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MLX4_CMD_WRAPPED);
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if (err) {
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mlx4_err(dev, "Sense command failed for port: %d\n", port);
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return err;
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}
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if (out_param > 2) {
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mlx4_err(dev, "Sense returned illegal value: 0x%llx\n", out_param);
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return -EINVAL;
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}
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*type = out_param;
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return 0;
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}
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void mlx4_do_sense_ports(struct mlx4_dev *dev,
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enum mlx4_port_type *stype,
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enum mlx4_port_type *defaults)
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{
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struct mlx4_sense *sense = &mlx4_priv(dev)->sense;
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int err;
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int i;
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for (i = 1; i <= dev->caps.num_ports; i++) {
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stype[i - 1] = 0;
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if (sense->do_sense_port[i] && sense->sense_allowed[i] &&
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dev->caps.possible_type[i] == MLX4_PORT_TYPE_AUTO) {
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err = mlx4_SENSE_PORT(dev, i, &stype[i - 1]);
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if (err)
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stype[i - 1] = defaults[i - 1];
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} else
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stype[i - 1] = defaults[i - 1];
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}
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/*
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* If sensed nothing, remain in current configuration.
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*/
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for (i = 0; i < dev->caps.num_ports; i++)
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stype[i] = stype[i] ? stype[i] : defaults[i];
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}
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static void mlx4_sense_port(struct work_struct *work)
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{
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struct delayed_work *delay = to_delayed_work(work);
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struct mlx4_sense *sense = container_of(delay, struct mlx4_sense,
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sense_poll);
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struct mlx4_dev *dev = sense->dev;
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struct mlx4_priv *priv = mlx4_priv(dev);
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enum mlx4_port_type stype[MLX4_MAX_PORTS];
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mutex_lock(&priv->port_mutex);
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mlx4_do_sense_ports(dev, stype, &dev->caps.port_type[1]);
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if (mlx4_check_port_params(dev, stype))
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goto sense_again;
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if (mlx4_change_port_types(dev, stype))
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mlx4_err(dev, "Failed to change port_types\n");
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sense_again:
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mutex_unlock(&priv->port_mutex);
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queue_delayed_work(mlx4_wq , &sense->sense_poll,
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round_jiffies_relative(MLX4_SENSE_RANGE));
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}
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void mlx4_start_sense(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_sense *sense = &priv->sense;
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if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP))
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return;
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queue_delayed_work(mlx4_wq , &sense->sense_poll,
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round_jiffies_relative(MLX4_SENSE_RANGE));
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}
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void mlx4_stop_sense(struct mlx4_dev *dev)
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{
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cancel_delayed_work_sync(&mlx4_priv(dev)->sense.sense_poll);
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}
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void mlx4_sense_init(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_sense *sense = &priv->sense;
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int port;
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sense->dev = dev;
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for (port = 1; port <= dev->caps.num_ports; port++)
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sense->do_sense_port[port] = 1;
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INIT_DEFERRABLE_WORK(&sense->sense_poll, mlx4_sense_port);
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}
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