FreeBSD/Linux Kernel Cross Reference
sys/dev/mlx4/mlx4_core/mlx4_sense.c

     /*
      * Copyright (c) 2007, 2014 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 <dev/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", (long long)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);
           if (sense->gone != 0) {
                   mutex_unlock(&priv->port_mutex);
                   return;
           }
           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:
           queue_delayed_work(mlx4_wq , &sense->sense_poll,
                              round_jiffies_relative(MLX4_SENSE_RANGE));
           mutex_unlock(&priv->port_mutex);
   }
   
   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;
   
           mutex_lock(&priv->port_mutex);
           sense->gone = 0;
           queue_delayed_work(mlx4_wq , &sense->sense_poll,
                              round_jiffies_relative(MLX4_SENSE_RANGE));
           mutex_unlock(&priv->port_mutex);
   }
   
   void mlx4_stop_sense(struct mlx4_dev *dev)
   {
           struct mlx4_priv *priv = mlx4_priv(dev);
           struct mlx4_sense *sense = &priv->sense;
   
           mutex_lock(&priv->port_mutex);
           sense->gone = 1;
           mutex_unlock(&priv->port_mutex);
   
           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);
   }

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