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27bf91d6 YP |
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 | static 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); | |
e0802793 | 56 | return -EINVAL; |
27bf91d6 YP |
57 | } |
58 | ||
59 | *type = out_param; | |
60 | return 0; | |
61 | } | |
62 | ||
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 | ||
104 | static void mlx4_sense_port(struct work_struct *work) | |
105 | { | |
bf6aede7 | 106 | struct delayed_work *delay = to_delayed_work(work); |
27bf91d6 YP |
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 | ||
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 | ||
140 | void mlx4_stop_sense(struct mlx4_dev *dev) | |
141 | { | |
142 | cancel_delayed_work_sync(&mlx4_priv(dev)->sense.sense_poll); | |
143 | } | |
144 | ||
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 | } |