6b13f685e
 김민수
BSP 최초 추가
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/*
* Linux WiMAX
* Implement and export a method for resetting a WiMAX device
*
*
* Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
*
* This implements a simple synchronous call to reset a WiMAX device.
*
* Resets aim at being warm, keeping the device handles active;
* however, when that fails, it falls back to a cold reset (that will
* disconnect and reconnect the device).
*/
#include <net/wimax.h>
#include <net/genetlink.h>
#include <linux/wimax.h>
#include <linux/security.h>
#include <linux/export.h>
#include "wimax-internal.h"
#define D_SUBMODULE op_reset
#include "debug-levels.h"
/**
* wimax_reset - Reset a WiMAX device
*
* @wimax_dev: WiMAX device descriptor
*
* Returns:
*
* %0 if ok and a warm reset was done (the device still exists in
* the system).
*
* -%ENODEV if a cold/bus reset had to be done (device has
* disconnected and reconnected, so current handle is not valid
* any more).
*
* -%EINVAL if the device is not even registered.
*
* Any other negative error code shall be considered as
* non-recoverable.
*
* Description:
*
* Called when wanting to reset the device for any reason. Device is
* taken back to power on status.
*
* This call blocks; on successful return, the device has completed the
* reset process and is ready to operate.
*/
int wimax_reset(struct wimax_dev *wimax_dev)
{
int result = -EINVAL;
struct device *dev = wimax_dev_to_dev(wimax_dev);
enum wimax_st state;
might_sleep();
d_fnstart(3, dev, "(wimax_dev %p)
", wimax_dev);
mutex_lock(&wimax_dev->mutex);
dev_hold(wimax_dev->net_dev);
state = wimax_dev->state;
mutex_unlock(&wimax_dev->mutex);
if (state >= WIMAX_ST_DOWN) {
mutex_lock(&wimax_dev->mutex_reset);
result = wimax_dev->op_reset(wimax_dev);
mutex_unlock(&wimax_dev->mutex_reset);
}
dev_put(wimax_dev->net_dev);
d_fnend(3, dev, "(wimax_dev %p) = %d
", wimax_dev, result);
return result;
}
EXPORT_SYMBOL(wimax_reset);
/*
* Exporting to user space over generic netlink
*
* Parse the reset command from user space, return error code.
*
* No attributes.
*/
int wimax_gnl_doit_reset(struct sk_buff *skb, struct genl_info *info)
{
int result, ifindex;
struct wimax_dev *wimax_dev;
d_fnstart(3, NULL, "(skb %p info %p)
", skb, info);
result = -ENODEV;
if (info->attrs[WIMAX_GNL_RESET_IFIDX] == NULL) {
printk(KERN_ERR "WIMAX_GNL_OP_RFKILL: can't find IFIDX "
"attribute
");
goto error_no_wimax_dev;
}
ifindex = nla_get_u32(info->attrs[WIMAX_GNL_RESET_IFIDX]);
wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
if (wimax_dev == NULL)
goto error_no_wimax_dev;
/* Execute the operation and send the result back to user space */
result = wimax_reset(wimax_dev);
dev_put(wimax_dev->net_dev);
error_no_wimax_dev:
d_fnend(3, NULL, "(skb %p info %p) = %d
", skb, info, result);
return result;
}
|