aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/s390/block/dasd_cmb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/block/dasd_cmb.c')
-rw-r--r--drivers/s390/block/dasd_cmb.c128
1 files changed, 0 insertions, 128 deletions
diff --git a/drivers/s390/block/dasd_cmb.c b/drivers/s390/block/dasd_cmb.c
deleted file mode 100644
index e88f73ee72ce..000000000000
--- a/drivers/s390/block/dasd_cmb.c
+++ /dev/null
@@ -1,128 +0,0 @@
1/*
2 * Linux on zSeries Channel Measurement Facility support
3 * (dasd device driver interface)
4 *
5 * Copyright 2000,2003 IBM Corporation
6 *
7 * Author: Arnd Bergmann <arndb@de.ibm.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23#include <linux/init.h>
24#include <linux/module.h>
25#include <asm/ccwdev.h>
26#include <asm/cmb.h>
27
28#include "dasd_int.h"
29
30static int
31dasd_ioctl_cmf_enable(struct block_device *bdev, int no, long args)
32{
33 struct dasd_device *device;
34
35 device = bdev->bd_disk->private_data;
36 if (!device)
37 return -EINVAL;
38
39 return enable_cmf(device->cdev);
40}
41
42static int
43dasd_ioctl_cmf_disable(struct block_device *bdev, int no, long args)
44{
45 struct dasd_device *device;
46
47 device = bdev->bd_disk->private_data;
48 if (!device)
49 return -EINVAL;
50
51 return disable_cmf(device->cdev);
52}
53
54static int
55dasd_ioctl_readall_cmb(struct block_device *bdev, int no, long args)
56{
57 struct dasd_device *device;
58 struct cmbdata __user *udata;
59 struct cmbdata data;
60 size_t size;
61 int ret;
62
63 device = bdev->bd_disk->private_data;
64 if (!device)
65 return -EINVAL;
66 udata = (void __user *) args;
67 size = _IOC_SIZE(no);
68
69 if (!access_ok(VERIFY_WRITE, udata, size))
70 return -EFAULT;
71 ret = cmf_readall(device->cdev, &data);
72 if (ret)
73 return ret;
74 if (copy_to_user(udata, &data, min(size, sizeof(*udata))))
75 return -EFAULT;
76 return 0;
77}
78
79/* module initialization below here. dasd already provides a mechanism
80 * to dynamically register ioctl functions, so we simply use this. */
81static inline int
82ioctl_reg(unsigned int no, dasd_ioctl_fn_t handler)
83{
84 return dasd_ioctl_no_register(THIS_MODULE, no, handler);
85}
86
87static inline void
88ioctl_unreg(unsigned int no, dasd_ioctl_fn_t handler)
89{
90 dasd_ioctl_no_unregister(THIS_MODULE, no, handler);
91}
92
93static void
94dasd_cmf_exit(void)
95{
96 ioctl_unreg(BIODASDCMFENABLE, dasd_ioctl_cmf_enable);
97 ioctl_unreg(BIODASDCMFDISABLE, dasd_ioctl_cmf_disable);
98 ioctl_unreg(BIODASDREADALLCMB, dasd_ioctl_readall_cmb);
99}
100
101static int __init
102dasd_cmf_init(void)
103{
104 int ret;
105 ret = ioctl_reg (BIODASDCMFENABLE, dasd_ioctl_cmf_enable);
106 if (ret)
107 goto err;
108 ret = ioctl_reg (BIODASDCMFDISABLE, dasd_ioctl_cmf_disable);
109 if (ret)
110 goto err;
111 ret = ioctl_reg (BIODASDREADALLCMB, dasd_ioctl_readall_cmb);
112 if (ret)
113 goto err;
114
115 return 0;
116err:
117 dasd_cmf_exit();
118
119 return ret;
120}
121
122module_init(dasd_cmf_init);
123module_exit(dasd_cmf_exit);
124
125MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
126MODULE_LICENSE("GPL");
127MODULE_DESCRIPTION("channel measurement facility interface for dasd\n"
128 "Copyright 2003 IBM Corporation\n");