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sense.c
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1 /*
2  * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses. You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  * Redistribution and use in source and binary forms, with or
11  * without modification, are permitted provided that the following
12  * conditions are met:
13  *
14  * - Redistributions of source code must retain the above
15  * copyright notice, this list of conditions and the following
16  * disclaimer.
17  *
18  * - Redistributions in binary form must reproduce the above
19  * copyright notice, this list of conditions and the following
20  * disclaimer in the documentation and/or other materials
21  * provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  *
32  */
33 
34 #include <linux/errno.h>
35 #include <linux/if_ether.h>
36 
37 #include <linux/mlx4/cmd.h>
38 
39 #include "mlx4.h"
40 
41 int mlx4_SENSE_PORT(struct mlx4_dev *dev, int port,
42  enum mlx4_port_type *type)
43 {
44  u64 out_param;
45  int err = 0;
46 
47  err = mlx4_cmd_imm(dev, 0, &out_param, port, 0,
50  if (err) {
51  mlx4_err(dev, "Sense command failed for port: %d\n", port);
52  return err;
53  }
54 
55  if (out_param > 2) {
56  mlx4_err(dev, "Sense returned illegal value: 0x%llx\n", out_param);
57  return -EINVAL;
58  }
59 
60  *type = out_param;
61  return 0;
62 }
63 
65  enum mlx4_port_type *stype,
66  enum mlx4_port_type *defaults)
67 {
68  struct mlx4_sense *sense = &mlx4_priv(dev)->sense;
69  int err;
70  int i;
71 
72  for (i = 1; i <= dev->caps.num_ports; i++) {
73  stype[i - 1] = 0;
74  if (sense->do_sense_port[i] && sense->sense_allowed[i] &&
75  dev->caps.possible_type[i] == MLX4_PORT_TYPE_AUTO) {
76  err = mlx4_SENSE_PORT(dev, i, &stype[i - 1]);
77  if (err)
78  stype[i - 1] = defaults[i - 1];
79  } else
80  stype[i - 1] = defaults[i - 1];
81  }
82 
83  /*
84  * If sensed nothing, remain in current configuration.
85  */
86  for (i = 0; i < dev->caps.num_ports; i++)
87  stype[i] = stype[i] ? stype[i] : defaults[i];
88 
89 }
90 
91 static void mlx4_sense_port(struct work_struct *work)
92 {
93  struct delayed_work *delay = to_delayed_work(work);
94  struct mlx4_sense *sense = container_of(delay, struct mlx4_sense,
95  sense_poll);
96  struct mlx4_dev *dev = sense->dev;
97  struct mlx4_priv *priv = mlx4_priv(dev);
98  enum mlx4_port_type stype[MLX4_MAX_PORTS];
99 
100  mutex_lock(&priv->port_mutex);
101  mlx4_do_sense_ports(dev, stype, &dev->caps.port_type[1]);
102 
103  if (mlx4_check_port_params(dev, stype))
104  goto sense_again;
105 
106  if (mlx4_change_port_types(dev, stype))
107  mlx4_err(dev, "Failed to change port_types\n");
108 
109 sense_again:
110  mutex_unlock(&priv->port_mutex);
113 }
114 
115 void mlx4_start_sense(struct mlx4_dev *dev)
116 {
117  struct mlx4_priv *priv = mlx4_priv(dev);
118  struct mlx4_sense *sense = &priv->sense;
119 
120  if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP))
121  return;
122 
125 }
126 
127 void mlx4_stop_sense(struct mlx4_dev *dev)
128 {
130 }
131 
132 void mlx4_sense_init(struct mlx4_dev *dev)
133 {
134  struct mlx4_priv *priv = mlx4_priv(dev);
135  struct mlx4_sense *sense = &priv->sense;
136  int port;
137 
138  sense->dev = dev;
139  for (port = 1; port <= dev->caps.num_ports; port++)
140  sense->do_sense_port[port] = 1;
141 
142  INIT_DEFERRABLE_WORK(&sense->sense_poll, mlx4_sense_port);
143 }