Linux-2.6.12-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!

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 @@
+/*
+ * IUCV special message driver
+ *
+ * Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/device.h>
+#include <asm/cpcmd.h>
+#include <asm/ebcdic.h>
+
+#include "iucv.h"
+
+struct smsg_callback {
+	struct list_head list;
+	char *prefix;
+	int len;
+	void (*callback)(char *str);
+};
+
+MODULE_AUTHOR
+   ("(C) 2003 IBM Corporation by Martin Schwidefsky (schwidefsky@de.ibm.com)");
+MODULE_DESCRIPTION ("Linux for S/390 IUCV special message driver");
+
+static iucv_handle_t smsg_handle;
+static unsigned short smsg_pathid;
+static DEFINE_SPINLOCK(smsg_list_lock);
+static struct list_head smsg_list = LIST_HEAD_INIT(smsg_list);
+
+static void
+smsg_connection_complete(iucv_ConnectionComplete *eib, void *pgm_data)
+{
+}
+
+
+static void
+smsg_message_pending(iucv_MessagePending *eib, void *pgm_data)
+{
+	struct smsg_callback *cb;
+	unsigned char *msg;
+	unsigned short len;
+	int rc;
+
+	len = eib->ln1msg2.ipbfln1f;
+	msg = kmalloc(len + 1, GFP_ATOMIC|GFP_DMA);
+	if (!msg) {
+		iucv_reject(eib->ippathid, eib->ipmsgid, eib->iptrgcls);
+		return;
+	}
+	rc = iucv_receive(eib->ippathid, eib->ipmsgid, eib->iptrgcls,
+			  msg, len, 0, 0, 0);
+	if (rc == 0) {
+		msg[len] = 0;
+		EBCASC(msg, len);
+		spin_lock(&smsg_list_lock);
+		list_for_each_entry(cb, &smsg_list, list)
+			if (strncmp(msg + 8, cb->prefix, cb->len) == 0) {
+				cb->callback(msg + 8);
+				break;
+			}
+		spin_unlock(&smsg_list_lock);
+	}
+	kfree(msg);
+}
+
+static iucv_interrupt_ops_t smsg_ops = {
+	.ConnectionComplete = smsg_connection_complete,
+	.MessagePending     = smsg_message_pending,
+};
+
+static struct device_driver smsg_driver = {
+	.name = "SMSGIUCV",
+	.bus  = &iucv_bus,
+};
+
+int
+smsg_register_callback(char *prefix, void (*callback)(char *str))
+{
+	struct smsg_callback *cb;
+
+	cb = kmalloc(sizeof(struct smsg_callback), GFP_KERNEL);
+	if (!cb)
+		return -ENOMEM;
+	cb->prefix = prefix;
+	cb->len = strlen(prefix);
+	cb->callback = callback;
+	spin_lock(&smsg_list_lock);
+	list_add_tail(&cb->list, &smsg_list);
+	spin_unlock(&smsg_list_lock);
+	return 0;
+}
+
+void
+smsg_unregister_callback(char *prefix, void (*callback)(char *str))
+{
+	struct smsg_callback *cb, *tmp;
+
+	spin_lock(&smsg_list_lock);
+	cb = 0;
+	list_for_each_entry(tmp, &smsg_list, list)
+		if (tmp->callback == callback &&
+		    strcmp(tmp->prefix, prefix) == 0) {
+			cb = tmp;
+			list_del(&cb->list);
+			break;
+		}
+	spin_unlock(&smsg_list_lock);
+	kfree(cb);
+}
+
+static void __exit
+smsg_exit(void)
+{
+	if (smsg_handle > 0) {
+		cpcmd("SET SMSG OFF", 0, 0);
+		iucv_sever(smsg_pathid, 0);
+		iucv_unregister_program(smsg_handle);
+		driver_unregister(&smsg_driver);
+	}
+	return;
+}
+
+static int __init
+smsg_init(void)
+{
+	static unsigned char pgmmask[24] = {
+		0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+		0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+		0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+	};
+	int rc;
+
+	rc = driver_register(&smsg_driver);
+	if (rc != 0) {
+		printk(KERN_ERR "SMSGIUCV: failed to register driver.\n");
+		return rc;
+	}
+	smsg_handle = iucv_register_program("SMSGIUCV        ", "*MSG    ",
+					    pgmmask, &smsg_ops, 0);
+	if (!smsg_handle) {
+		printk(KERN_ERR "SMSGIUCV: failed to register to iucv");
+		driver_unregister(&smsg_driver);
+		return -EIO;	/* better errno ? */
+	}
+	rc = iucv_connect (&smsg_pathid, 1, 0, "*MSG    ", 0, 0, 0, 0,
+			   smsg_handle, 0);
+	if (rc) {
+		printk(KERN_ERR "SMSGIUCV: failed to connect to *MSG");
+		iucv_unregister_program(smsg_handle);
+		driver_unregister(&smsg_driver);
+		smsg_handle = 0;
+		return -EIO;
+	}
+	cpcmd("SET SMSG IUCV", 0, 0);
+	return 0;
+}
+
+module_init(smsg_init);
+module_exit(smsg_exit);
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(smsg_register_callback);
+EXPORT_SYMBOL(smsg_unregister_callback);