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