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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/s390/net/smsgiucv.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/s390/net/smsgiucv.c')
-rw-r--r--drivers/s390/net/smsgiucv.c180
1 files changed, 180 insertions, 0 deletions
diff --git a/drivers/s390/net/smsgiucv.c b/drivers/s390/net/smsgiucv.c
new file mode 100644
index 000000000000..a3d285859564
--- /dev/null
+++ b/drivers/s390/net/smsgiucv.c
@@ -0,0 +1,180 @@
1/*
2 * IUCV special message driver
3 *
4 * Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
5 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/errno.h>
25#include <linux/device.h>
26#include <asm/cpcmd.h>
27#include <asm/ebcdic.h>
28
29#include "iucv.h"
30
31struct smsg_callback {
32 struct list_head list;
33 char *prefix;
34 int len;
35 void (*callback)(char *str);
36};
37
38MODULE_AUTHOR
39 ("(C) 2003 IBM Corporation by Martin Schwidefsky (schwidefsky@de.ibm.com)");
40MODULE_DESCRIPTION ("Linux for S/390 IUCV special message driver");
41
42static iucv_handle_t smsg_handle;
43static unsigned short smsg_pathid;
44static DEFINE_SPINLOCK(smsg_list_lock);
45static struct list_head smsg_list = LIST_HEAD_INIT(smsg_list);
46
47static void
48smsg_connection_complete(iucv_ConnectionComplete *eib, void *pgm_data)
49{
50}
51
52
53static void
54smsg_message_pending(iucv_MessagePending *eib, void *pgm_data)
55{
56 struct smsg_callback *cb;
57 unsigned char *msg;
58 unsigned short len;
59 int rc;
60
61 len = eib->ln1msg2.ipbfln1f;
62 msg = kmalloc(len + 1, GFP_ATOMIC|GFP_DMA);
63 if (!msg) {
64 iucv_reject(eib->ippathid, eib->ipmsgid, eib->iptrgcls);
65 return;
66 }
67 rc = iucv_receive(eib->ippathid, eib->ipmsgid, eib->iptrgcls,
68 msg, len, 0, 0, 0);
69 if (rc == 0) {
70 msg[len] = 0;
71 EBCASC(msg, len);
72 spin_lock(&smsg_list_lock);
73 list_for_each_entry(cb, &smsg_list, list)
74 if (strncmp(msg + 8, cb->prefix, cb->len) == 0) {
75 cb->callback(msg + 8);
76 break;
77 }
78 spin_unlock(&smsg_list_lock);
79 }
80 kfree(msg);
81}
82
83static iucv_interrupt_ops_t smsg_ops = {
84 .ConnectionComplete = smsg_connection_complete,
85 .MessagePending = smsg_message_pending,
86};
87
88static struct device_driver smsg_driver = {
89 .name = "SMSGIUCV",
90 .bus = &iucv_bus,
91};
92
93int
94smsg_register_callback(char *prefix, void (*callback)(char *str))
95{
96 struct smsg_callback *cb;
97
98 cb = kmalloc(sizeof(struct smsg_callback), GFP_KERNEL);
99 if (!cb)
100 return -ENOMEM;
101 cb->prefix = prefix;
102 cb->len = strlen(prefix);
103 cb->callback = callback;
104 spin_lock(&smsg_list_lock);
105 list_add_tail(&cb->list, &smsg_list);
106 spin_unlock(&smsg_list_lock);
107 return 0;
108}
109
110void
111smsg_unregister_callback(char *prefix, void (*callback)(char *str))
112{
113 struct smsg_callback *cb, *tmp;
114
115 spin_lock(&smsg_list_lock);
116 cb = 0;
117 list_for_each_entry(tmp, &smsg_list, list)
118 if (tmp->callback == callback &&
119 strcmp(tmp->prefix, prefix) == 0) {
120 cb = tmp;
121 list_del(&cb->list);
122 break;
123 }
124 spin_unlock(&smsg_list_lock);
125 kfree(cb);
126}
127
128static void __exit
129smsg_exit(void)
130{
131 if (smsg_handle > 0) {
132 cpcmd("SET SMSG OFF", 0, 0);
133 iucv_sever(smsg_pathid, 0);
134 iucv_unregister_program(smsg_handle);
135 driver_unregister(&smsg_driver);
136 }
137 return;
138}
139
140static int __init
141smsg_init(void)
142{
143 static unsigned char pgmmask[24] = {
144 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
145 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
146 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
147 };
148 int rc;
149
150 rc = driver_register(&smsg_driver);
151 if (rc != 0) {
152 printk(KERN_ERR "SMSGIUCV: failed to register driver.\n");
153 return rc;
154 }
155 smsg_handle = iucv_register_program("SMSGIUCV ", "*MSG ",
156 pgmmask, &smsg_ops, 0);
157 if (!smsg_handle) {
158 printk(KERN_ERR "SMSGIUCV: failed to register to iucv");
159 driver_unregister(&smsg_driver);
160 return -EIO; /* better errno ? */
161 }
162 rc = iucv_connect (&smsg_pathid, 1, 0, "*MSG ", 0, 0, 0, 0,
163 smsg_handle, 0);
164 if (rc) {
165 printk(KERN_ERR "SMSGIUCV: failed to connect to *MSG");
166 iucv_unregister_program(smsg_handle);
167 driver_unregister(&smsg_driver);
168 smsg_handle = 0;
169 return -EIO;
170 }
171 cpcmd("SET SMSG IUCV", 0, 0);
172 return 0;
173}
174
175module_init(smsg_init);
176module_exit(smsg_exit);
177MODULE_LICENSE("GPL");
178
179EXPORT_SYMBOL(smsg_register_callback);
180EXPORT_SYMBOL(smsg_unregister_callback);