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[S390]: Adapt special message interface to new IUCV API
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Adapt special message interface to new IUCV API

Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Martin Schwidefsky authored and David S. Miller committed Feb 8, 2007
1 parent eebce38 commit 5da5e65
Showing 1 changed file with 74 additions and 73 deletions.
147 changes: 74 additions & 73 deletions drivers/s390/net/smsgiucv.c
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
/*
* IUCV special message driver
*
* Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Copyright 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
Expand All @@ -23,10 +23,10 @@
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <net/iucv/iucv.h>
#include <asm/cpcmd.h>
#include <asm/ebcdic.h>

#include "iucv.h"
#include "smsgiucv.h"

struct smsg_callback {
struct list_head list;
Expand All @@ -39,38 +39,46 @@ 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 struct iucv_path *smsg_path;

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 int smsg_path_pending(struct iucv_path *, u8 ipvmid[8], u8 ipuser[16]);
static void smsg_message_pending(struct iucv_path *, struct iucv_message *);

static struct iucv_handler smsg_handler = {
.path_pending = smsg_path_pending,
.message_pending = smsg_message_pending,
};

static int smsg_path_pending(struct iucv_path *path, u8 ipvmid[8],
u8 ipuser[16])
{
if (strncmp(ipvmid, "*MSG ", sizeof(ipvmid)) != 0)
return -EINVAL;
/* Path pending from *MSG. */
return iucv_path_accept(path, &smsg_handler, "SMSGIUCV ", NULL);
}


static void
smsg_message_pending(iucv_MessagePending *eib, void *pgm_data)
static void smsg_message_pending(struct iucv_path *path,
struct iucv_message *msg)
{
struct smsg_callback *cb;
unsigned char *msg;
unsigned char *buffer;
unsigned char sender[9];
unsigned short len;
int rc, i;

len = eib->ln1msg2.ipbfln1f;
msg = kmalloc(len + 1, GFP_ATOMIC|GFP_DMA);
if (!msg) {
iucv_reject(eib->ippathid, eib->ipmsgid, eib->iptrgcls);
buffer = kmalloc(msg->length + 1, GFP_ATOMIC | GFP_DMA);
if (!buffer) {
iucv_message_reject(path, msg);
return;
}
rc = iucv_receive(eib->ippathid, eib->ipmsgid, eib->iptrgcls,
msg, len, NULL, NULL, NULL);
rc = iucv_message_receive(path, msg, 0, buffer, msg->length, NULL);
if (rc == 0) {
msg[len] = 0;
EBCASC(msg, len);
memcpy(sender, msg, 8);
buffer[msg->length] = 0;
EBCASC(buffer, msg->length);
memcpy(sender, buffer, 8);
sender[8] = 0;
/* Remove trailing whitespace from the sender name. */
for (i = 7; i >= 0; i--) {
Expand All @@ -80,27 +88,17 @@ smsg_message_pending(iucv_MessagePending *eib, void *pgm_data)
}
spin_lock(&smsg_list_lock);
list_for_each_entry(cb, &smsg_list, list)
if (strncmp(msg + 8, cb->prefix, cb->len) == 0) {
cb->callback(sender, msg + 8);
if (strncmp(buffer + 8, cb->prefix, cb->len) == 0) {
cb->callback(sender, buffer + 8);
break;
}
spin_unlock(&smsg_list_lock);
}
kfree(msg);
kfree(buffer);
}

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 *from, char *str))
int smsg_register_callback(char *prefix,
void (*callback)(char *from, char *str))
{
struct smsg_callback *cb;

Expand All @@ -110,18 +108,18 @@ smsg_register_callback(char *prefix, void (*callback)(char *from, char *str))
cb->prefix = prefix;
cb->len = strlen(prefix);
cb->callback = callback;
spin_lock(&smsg_list_lock);
spin_lock_bh(&smsg_list_lock);
list_add_tail(&cb->list, &smsg_list);
spin_unlock(&smsg_list_lock);
spin_unlock_bh(&smsg_list_lock);
return 0;
}

void
smsg_unregister_callback(char *prefix, void (*callback)(char *from, char *str))
void smsg_unregister_callback(char *prefix,
void (*callback)(char *from, char *str))
{
struct smsg_callback *cb, *tmp;

spin_lock(&smsg_list_lock);
spin_lock_bh(&smsg_list_lock);
cb = NULL;
list_for_each_entry(tmp, &smsg_list, list)
if (tmp->callback == callback &&
Expand All @@ -130,55 +128,58 @@ smsg_unregister_callback(char *prefix, void (*callback)(char *from, char *str))
list_del(&cb->list);
break;
}
spin_unlock(&smsg_list_lock);
spin_unlock_bh(&smsg_list_lock);
kfree(cb);
}

static void __exit
smsg_exit(void)
static struct device_driver smsg_driver = {
.name = "SMSGIUCV",
.bus = &iucv_bus,
};

static void __exit smsg_exit(void)
{
if (smsg_handle > 0) {
cpcmd("SET SMSG OFF", NULL, 0, NULL);
iucv_sever(smsg_pathid, NULL);
iucv_unregister_program(smsg_handle);
driver_unregister(&smsg_driver);
}
return;
cpcmd("SET SMSG IUCV", NULL, 0, NULL);
iucv_unregister(&smsg_handler, 1);
driver_unregister(&smsg_driver);
}

static int __init
smsg_init(void)
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, NULL);
if (!smsg_handle) {
if (rc != 0)
goto out;
rc = iucv_register(&smsg_handler, 1);
if (rc) {
printk(KERN_ERR "SMSGIUCV: failed to register to iucv");
driver_unregister(&smsg_driver);
return -EIO; /* better errno ? */
rc = -EIO; /* better errno ? */
goto out_driver;
}
smsg_path = iucv_path_alloc(255, 0, GFP_KERNEL);
if (!smsg_path) {
rc = -ENOMEM;
goto out_register;
}
rc = iucv_connect (&smsg_pathid, 255, NULL, "*MSG ", NULL, 0,
NULL, NULL, smsg_handle, NULL);
rc = iucv_path_connect(smsg_path, &smsg_handler, "*MSG ",
NULL, NULL, NULL);
if (rc) {
printk(KERN_ERR "SMSGIUCV: failed to connect to *MSG");
iucv_unregister_program(smsg_handle);
driver_unregister(&smsg_driver);
smsg_handle = NULL;
return -EIO;
rc = -EIO; /* better errno ? */
goto out_free;
}
cpcmd("SET SMSG IUCV", NULL, 0, NULL);
return 0;

out_free:
iucv_path_free(smsg_path);
out_register:
iucv_unregister(&smsg_handler, 1);
out_driver:
driver_unregister(&smsg_driver);
out:
return rc;
}

module_init(smsg_init);
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