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 MLX4_CMD_WRAPPED);
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
mlx4_do_sense_ports(struct mlx4_dev * dev,enum mlx4_port_type * stype,enum mlx4_port_type * defaults)64 void mlx4_do_sense_ports(struct mlx4_dev *dev,
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 * Adjust port configuration:
85 * If port 1 sensed nothing and port 2 is IB, set both as IB
86 * If port 2 sensed nothing and port 1 is Eth, set both as Eth
87 */
88 if (stype[0] == MLX4_PORT_TYPE_ETH) {
89 for (i = 1; i < dev->caps.num_ports; i++)
90 stype[i] = stype[i] ? stype[i] : MLX4_PORT_TYPE_ETH;
91 }
92 if (stype[dev->caps.num_ports - 1] == MLX4_PORT_TYPE_IB) {
93 for (i = 0; i < dev->caps.num_ports - 1; i++)
94 stype[i] = stype[i] ? stype[i] : MLX4_PORT_TYPE_IB;
95 }
96
97 /*
98 * If sensed nothing, remain in current configuration.
99 */
100 for (i = 0; i < dev->caps.num_ports; i++)
101 stype[i] = stype[i] ? stype[i] : defaults[i];
102
103 }
104
mlx4_sense_port(struct work_struct * work)105 static void mlx4_sense_port(struct work_struct *work)
106 {
107 struct delayed_work *delay = to_delayed_work(work);
108 struct mlx4_sense *sense = container_of(delay, struct mlx4_sense,
109 sense_poll);
110 struct mlx4_dev *dev = sense->dev;
111 struct mlx4_priv *priv = mlx4_priv(dev);
112 enum mlx4_port_type stype[MLX4_MAX_PORTS];
113
114 mutex_lock(&priv->port_mutex);
115 mlx4_do_sense_ports(dev, stype, &dev->caps.port_type[1]);
116
117 if (mlx4_check_port_params(dev, stype))
118 goto sense_again;
119
120 if (mlx4_change_port_types(dev, stype))
121 mlx4_err(dev, "Failed to change port_types\n");
122
123 sense_again:
124 mutex_unlock(&priv->port_mutex);
125 queue_delayed_work(mlx4_wq , &sense->sense_poll,
126 round_jiffies_relative(MLX4_SENSE_RANGE));
127 }
128
mlx4_start_sense(struct mlx4_dev * dev)129 void mlx4_start_sense(struct mlx4_dev *dev)
130 {
131 struct mlx4_priv *priv = mlx4_priv(dev);
132 struct mlx4_sense *sense = &priv->sense;
133
134 if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP))
135 return;
136
137 queue_delayed_work(mlx4_wq , &sense->sense_poll,
138 round_jiffies_relative(MLX4_SENSE_RANGE));
139 }
140
mlx4_stop_sense(struct mlx4_dev * dev)141 void mlx4_stop_sense(struct mlx4_dev *dev)
142 {
143 cancel_delayed_work_sync(&mlx4_priv(dev)->sense.sense_poll);
144 }
145
mlx4_sense_init(struct mlx4_dev * dev)146 void mlx4_sense_init(struct mlx4_dev *dev)
147 {
148 struct mlx4_priv *priv = mlx4_priv(dev);
149 struct mlx4_sense *sense = &priv->sense;
150 int port;
151
152 sense->dev = dev;
153 for (port = 1; port <= dev->caps.num_ports; port++)
154 sense->do_sense_port[port] = 1;
155
156 INIT_DELAYED_WORK_DEFERRABLE(&sense->sense_poll, mlx4_sense_port);
157 }
158