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
mlx4_SENSE_PORT(struct mlx4_dev * dev,int port,enum mlx4_port_type * type)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,
48 MLX4_CMD_SENSE_PORT, MLX4_CMD_TIME_CLASS_B);
49 if (err) {
50 mlx4_err(dev, "Sense command failed for port: %d\n", port);
51 return err;
52 }
53
54 if (out_param > 2) {
55 mlx4_err(dev, "Sense returned illegal value: 0x%llx\n", out_param);
56 return -EINVAL;
57 }
58
59 *type = out_param;
60 return 0;
61 }
62
mlx4_do_sense_ports(struct mlx4_dev * dev,enum mlx4_port_type * stype,enum mlx4_port_type * defaults)63 void mlx4_do_sense_ports(struct mlx4_dev *dev,
64 enum mlx4_port_type *stype,
65 enum mlx4_port_type *defaults)
66 {
67 struct mlx4_sense *sense = &mlx4_priv(dev)->sense;
68 int err;
69 int i;
70
71 for (i = 1; i <= dev->caps.num_ports; i++) {
72 stype[i - 1] = 0;
73 if (sense->do_sense_port[i] && sense->sense_allowed[i] &&
74 dev->caps.possible_type[i] == MLX4_PORT_TYPE_AUTO) {
75 err = mlx4_SENSE_PORT(dev, i, &stype[i - 1]);
76 if (err)
77 stype[i - 1] = defaults[i - 1];
78 } else
79 stype[i - 1] = defaults[i - 1];
80 }
81
82 /*
83 * Adjust port configuration:
84 * If port 1 sensed nothing and port 2 is IB, set both as IB
85 * If port 2 sensed nothing and port 1 is Eth, set both as Eth
86 */
87 if (stype[0] == MLX4_PORT_TYPE_ETH) {
88 for (i = 1; i < dev->caps.num_ports; i++)
89 stype[i] = stype[i] ? stype[i] : MLX4_PORT_TYPE_ETH;
90 }
91 if (stype[dev->caps.num_ports - 1] == MLX4_PORT_TYPE_IB) {
92 for (i = 0; i < dev->caps.num_ports - 1; i++)
93 stype[i] = stype[i] ? stype[i] : MLX4_PORT_TYPE_IB;
94 }
95
96 /*
97 * If sensed nothing, remain in current configuration.
98 */
99 for (i = 0; i < dev->caps.num_ports; i++)
100 stype[i] = stype[i] ? stype[i] : defaults[i];
101
102 }
103
mlx4_sense_port(struct work_struct * work)104 static void mlx4_sense_port(struct work_struct *work)
105 {
106 struct delayed_work *delay = to_delayed_work(work);
107 struct mlx4_sense *sense = container_of(delay, struct mlx4_sense,
108 sense_poll);
109 struct mlx4_dev *dev = sense->dev;
110 struct mlx4_priv *priv = mlx4_priv(dev);
111 enum mlx4_port_type stype[MLX4_MAX_PORTS];
112
113 mutex_lock(&priv->port_mutex);
114 mlx4_do_sense_ports(dev, stype, &dev->caps.port_type[1]);
115
116 if (mlx4_check_port_params(dev, stype))
117 goto sense_again;
118
119 if (mlx4_change_port_types(dev, stype))
120 mlx4_err(dev, "Failed to change port_types\n");
121
122 sense_again:
123 mutex_unlock(&priv->port_mutex);
124 queue_delayed_work(mlx4_wq , &sense->sense_poll,
125 round_jiffies_relative(MLX4_SENSE_RANGE));
126 }
127
mlx4_start_sense(struct mlx4_dev * dev)128 void mlx4_start_sense(struct mlx4_dev *dev)
129 {
130 struct mlx4_priv *priv = mlx4_priv(dev);
131 struct mlx4_sense *sense = &priv->sense;
132
133 if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP))
134 return;
135
136 queue_delayed_work(mlx4_wq , &sense->sense_poll,
137 round_jiffies_relative(MLX4_SENSE_RANGE));
138 }
139
mlx4_stop_sense(struct mlx4_dev * dev)140 void mlx4_stop_sense(struct mlx4_dev *dev)
141 {
142 cancel_delayed_work_sync(&mlx4_priv(dev)->sense.sense_poll);
143 }
144
mlx4_sense_init(struct mlx4_dev * dev)145 void mlx4_sense_init(struct mlx4_dev *dev)
146 {
147 struct mlx4_priv *priv = mlx4_priv(dev);
148 struct mlx4_sense *sense = &priv->sense;
149 int port;
150
151 sense->dev = dev;
152 for (port = 1; port <= dev->caps.num_ports; port++)
153 sense->do_sense_port[port] = 1;
154
155 INIT_DELAYED_WORK_DEFERRABLE(&sense->sense_poll, mlx4_sense_port);
156 }
157