Commit c667aac8 authored by Martin Schwidefsky's avatar Martin Schwidefsky Committed by David S. Miller
Browse files

[S390]: Adapt monreader driver to new IUCV API



Adapt monreader character device driver to new IUCV API
Signed-off-by: default avatarFrank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2356f4cb
......@@ -3,7 +3,7 @@
*
* Character device driver for reading z/VM *MONITOR service records.
*
* Copyright (C) 2004 IBM Corporation, IBM Deutschland Entwicklung GmbH.
* Copyright 2004 IBM Corporation, IBM Deutschland Entwicklung GmbH.
*
* Author: Gerald Schaefer <geraldsc@de.ibm.com>
*/
......@@ -22,7 +22,7 @@
#include <asm/ebcdic.h>
#include <asm/extmem.h>
#include <linux/poll.h>
#include "../net/iucv.h"
#include <net/iucv/iucv.h>
//#define MON_DEBUG /* Debug messages on/off */
......@@ -50,14 +50,13 @@ static char mon_dcss_name[9] = "MONDCSS\0";
struct mon_msg {
u32 pos;
u32 mca_offset;
iucv_MessagePending local_eib;
struct iucv_message msg;
char msglim_reached;
char replied_msglim;
};
struct mon_private {
u16 pathid;
iucv_handle_t iucv_handle;
struct iucv_path *path;
struct mon_msg *msg_array[MON_MSGLIM];
unsigned int write_index;
unsigned int read_index;
......@@ -75,8 +74,6 @@ static unsigned long mon_dcss_end;
static DECLARE_WAIT_QUEUE_HEAD(mon_read_wait_queue);
static DECLARE_WAIT_QUEUE_HEAD(mon_conn_wait_queue);
static u8 iucv_host[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
static u8 user_data_connect[16] = {
/* Version code, must be 0x01 for shared mode */
0x01,
......@@ -100,8 +97,7 @@ static u8 user_data_sever[16] = {
* Create the 8 bytes EBCDIC DCSS segment name from
* an ASCII name, incl. padding
*/
static inline void
dcss_mkname(char *ascii_name, char *ebcdic_name)
static inline void dcss_mkname(char *ascii_name, char *ebcdic_name)
{
int i;
......@@ -119,8 +115,7 @@ dcss_mkname(char *ascii_name, char *ebcdic_name)
* print appropriate error message for segment_load()/segment_type()
* return code
*/
static void
mon_segment_warn(int rc, char* seg_name)
static void mon_segment_warn(int rc, char* seg_name)
{
switch (rc) {
case -ENOENT:
......@@ -166,44 +161,37 @@ mon_segment_warn(int rc, char* seg_name)
}
}
static inline unsigned long
mon_mca_start(struct mon_msg *monmsg)
static inline unsigned long mon_mca_start(struct mon_msg *monmsg)
{
return monmsg->local_eib.ln1msg1.iprmmsg1_u32;
return *(u32 *) &monmsg->msg.rmmsg;
}
static inline unsigned long
mon_mca_end(struct mon_msg *monmsg)
static inline unsigned long mon_mca_end(struct mon_msg *monmsg)
{
return monmsg->local_eib.ln1msg2.ipbfln1f;
return *(u32 *) &monmsg->msg.rmmsg[4];
}
static inline u8
mon_mca_type(struct mon_msg *monmsg, u8 index)
static inline u8 mon_mca_type(struct mon_msg *monmsg, u8 index)
{
return *((u8 *) mon_mca_start(monmsg) + monmsg->mca_offset + index);
}
static inline u32
mon_mca_size(struct mon_msg *monmsg)
static inline u32 mon_mca_size(struct mon_msg *monmsg)
{
return mon_mca_end(monmsg) - mon_mca_start(monmsg) + 1;
}
static inline u32
mon_rec_start(struct mon_msg *monmsg)
static inline u32 mon_rec_start(struct mon_msg *monmsg)
{
return *((u32 *) (mon_mca_start(monmsg) + monmsg->mca_offset + 4));
}
static inline u32
mon_rec_end(struct mon_msg *monmsg)
static inline u32 mon_rec_end(struct mon_msg *monmsg)
{
return *((u32 *) (mon_mca_start(monmsg) + monmsg->mca_offset + 8));
}
static inline int
mon_check_mca(struct mon_msg *monmsg)
static inline int mon_check_mca(struct mon_msg *monmsg)
{
if ((mon_rec_end(monmsg) <= mon_rec_start(monmsg)) ||
(mon_rec_start(monmsg) < mon_dcss_start) ||
......@@ -221,20 +209,17 @@ mon_check_mca(struct mon_msg *monmsg)
return 0;
}
static inline int
mon_send_reply(struct mon_msg *monmsg, struct mon_private *monpriv)
static inline int mon_send_reply(struct mon_msg *monmsg,
struct mon_private *monpriv)
{
u8 prmmsg[8];
int rc;
P_DEBUG("read, REPLY: pathid = 0x%04X, msgid = 0x%08X, trgcls = "
"0x%08X\n\n",
monmsg->local_eib.ippathid, monmsg->local_eib.ipmsgid,
monmsg->local_eib.iptrgcls);
rc = iucv_reply_prmmsg(monmsg->local_eib.ippathid,
monmsg->local_eib.ipmsgid,
monmsg->local_eib.iptrgcls,
0, prmmsg);
monpriv->path->pathid, monmsg->msg.id, monmsg->msg.class);
rc = iucv_message_reply(monpriv->path, &monmsg->msg,
IUCV_IPRMDATA, NULL, 0);
atomic_dec(&monpriv->msglim_count);
if (likely(!monmsg->msglim_reached)) {
monmsg->pos = 0;
......@@ -251,10 +236,19 @@ mon_send_reply(struct mon_msg *monmsg, struct mon_private *monpriv)
return 0;
}
static inline struct mon_private *
mon_alloc_mem(void)
static inline void mon_free_mem(struct mon_private *monpriv)
{
int i;
for (i = 0; i < MON_MSGLIM; i++)
if (monpriv->msg_array[i])
kfree(monpriv->msg_array[i]);
kfree(monpriv);
}
static inline struct mon_private *mon_alloc_mem(void)
{
int i,j;
int i;
struct mon_private *monpriv;
monpriv = kzalloc(sizeof(struct mon_private), GFP_KERNEL);
......@@ -267,16 +261,15 @@ mon_alloc_mem(void)
GFP_KERNEL);
if (!monpriv->msg_array[i]) {
P_ERROR("open, no memory for msg_array\n");
for (j = 0; j < i; j++)
kfree(monpriv->msg_array[j]);
mon_free_mem(monpriv);
return NULL;
}
}
return monpriv;
}
static inline void
mon_read_debug(struct mon_msg *monmsg, struct mon_private *monpriv)
static inline void mon_read_debug(struct mon_msg *monmsg,
struct mon_private *monpriv)
{
#ifdef MON_DEBUG
u8 msg_type[2], mca_type;
......@@ -284,7 +277,7 @@ mon_read_debug(struct mon_msg *monmsg, struct mon_private *monpriv)
records_len = mon_rec_end(monmsg) - mon_rec_start(monmsg) + 1;
memcpy(msg_type, &monmsg->local_eib.iptrgcls, 2);
memcpy(msg_type, &monmsg->msg.class, 2);
EBCASC(msg_type, 2);
mca_type = mon_mca_type(monmsg, 0);
EBCASC(&mca_type, 1);
......@@ -292,8 +285,7 @@ mon_read_debug(struct mon_msg *monmsg, struct mon_private *monpriv)
P_DEBUG("read, mon_read_index = %i, mon_write_index = %i\n",
monpriv->read_index, monpriv->write_index);
P_DEBUG("read, pathid = 0x%04X, msgid = 0x%08X, trgcls = 0x%08X\n",
monmsg->local_eib.ippathid, monmsg->local_eib.ipmsgid,
monmsg->local_eib.iptrgcls);
monpriv->path->pathid, monmsg->msg.id, monmsg->msg.class);
P_DEBUG("read, msg_type = '%c%c', mca_type = '%c' / 0x%X / 0x%X\n",
msg_type[0], msg_type[1], mca_type ? mca_type : 'X',
mon_mca_type(monmsg, 1), mon_mca_type(monmsg, 2));
......@@ -306,8 +298,7 @@ mon_read_debug(struct mon_msg *monmsg, struct mon_private *monpriv)
#endif
}
static inline void
mon_next_mca(struct mon_msg *monmsg)
static inline void mon_next_mca(struct mon_msg *monmsg)
{
if (likely((mon_mca_size(monmsg) - monmsg->mca_offset) == 12))
return;
......@@ -316,8 +307,7 @@ mon_next_mca(struct mon_msg *monmsg)
monmsg->pos = 0;
}
static inline struct mon_msg *
mon_next_message(struct mon_private *monpriv)
static inline struct mon_msg *mon_next_message(struct mon_private *monpriv)
{
struct mon_msg *monmsg;
......@@ -342,39 +332,37 @@ mon_next_message(struct mon_private *monpriv)
/******************************************************************************
* IUCV handler *
*****************************************************************************/
static void
mon_iucv_ConnectionComplete(iucv_ConnectionComplete *eib, void *pgm_data)
static void mon_iucv_path_complete(struct iucv_path *path, u8 ipuser[16])
{
struct mon_private *monpriv = (struct mon_private *) pgm_data;
struct mon_private *monpriv = path->private;
P_DEBUG("IUCV connection completed\n");
P_DEBUG("IUCV ACCEPT (from *MONITOR): Version = 0x%02X, Event = "
"0x%02X, Sample = 0x%02X\n",
eib->ipuser[0], eib->ipuser[1], eib->ipuser[2]);
ipuser[0], ipuser[1], ipuser[2]);
atomic_set(&monpriv->iucv_connected, 1);
wake_up(&mon_conn_wait_queue);
}
static void
mon_iucv_ConnectionSevered(iucv_ConnectionSevered *eib, void *pgm_data)
static void mon_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
{
struct mon_private *monpriv = (struct mon_private *) pgm_data;
struct mon_private *monpriv = path->private;
P_ERROR("IUCV connection severed with rc = 0x%X\n",
(u8) eib->ipuser[0]);
P_ERROR("IUCV connection severed with rc = 0x%X\n", ipuser[0]);
iucv_path_sever(path, NULL);
atomic_set(&monpriv->iucv_severed, 1);
wake_up(&mon_conn_wait_queue);
wake_up_interruptible(&mon_read_wait_queue);
}
static void
mon_iucv_MessagePending(iucv_MessagePending *eib, void *pgm_data)
static void mon_iucv_message_pending(struct iucv_path *path,
struct iucv_message *msg)
{
struct mon_private *monpriv = (struct mon_private *) pgm_data;
struct mon_private *monpriv = path->private;
P_DEBUG("IUCV message pending\n");
memcpy(&monpriv->msg_array[monpriv->write_index]->local_eib, eib,
sizeof(iucv_MessagePending));
memcpy(&monpriv->msg_array[monpriv->write_index]->msg,
msg, sizeof(*msg));
if (atomic_inc_return(&monpriv->msglim_count) == MON_MSGLIM) {
P_WARNING("IUCV message pending, message limit (%i) reached\n",
MON_MSGLIM);
......@@ -385,54 +373,45 @@ mon_iucv_MessagePending(iucv_MessagePending *eib, void *pgm_data)
wake_up_interruptible(&mon_read_wait_queue);
}
static iucv_interrupt_ops_t mon_iucvops = {
.ConnectionComplete = mon_iucv_ConnectionComplete,
.ConnectionSevered = mon_iucv_ConnectionSevered,
.MessagePending = mon_iucv_MessagePending,
static struct iucv_handler monreader_iucv_handler = {
.path_complete = mon_iucv_path_complete,
.path_severed = mon_iucv_path_severed,
.message_pending = mon_iucv_message_pending,
};
/******************************************************************************
* file operations *
*****************************************************************************/
static int
mon_open(struct inode *inode, struct file *filp)
static int mon_open(struct inode *inode, struct file *filp)
{
int rc, i;
struct mon_private *monpriv;
int rc;
/*
* only one user allowed
*/
rc = -EBUSY;
if (test_and_set_bit(MON_IN_USE, &mon_in_use))
return -EBUSY;
goto out;
rc = -ENOMEM;
monpriv = mon_alloc_mem();
if (!monpriv)
return -ENOMEM;
goto out_use;
/*
* Register with IUCV and connect to *MONITOR service
* Connect to *MONITOR service
*/
monpriv->iucv_handle = iucv_register_program("my_monreader ",
MON_SERVICE,
NULL,
&mon_iucvops,
monpriv);
if (!monpriv->iucv_handle) {
P_ERROR("failed to register with iucv driver\n");
rc = -EIO;
goto out_error;
}
P_INFO("open, registered with IUCV\n");
rc = iucv_connect(&monpriv->pathid, MON_MSGLIM, user_data_connect,
MON_SERVICE, iucv_host, IPRMDATA, NULL, NULL,
monpriv->iucv_handle, NULL);
monpriv->path = iucv_path_alloc(MON_MSGLIM, IUCV_IPRMDATA, GFP_KERNEL);
if (!monpriv->path)
goto out_priv;
rc = iucv_path_connect(monpriv->path, &monreader_iucv_handler,
MON_SERVICE, NULL, user_data_connect, monpriv);
if (rc) {
P_ERROR("iucv connection to *MONITOR failed with "
"IPUSER SEVER code = %i\n", rc);
rc = -EIO;
goto out_unregister;
goto out_path;
}
/*
* Wait for connection confirmation
......@@ -444,24 +423,23 @@ mon_open(struct inode *inode, struct file *filp)
atomic_set(&monpriv->iucv_severed, 0);
atomic_set(&monpriv->iucv_connected, 0);
rc = -EIO;
goto out_unregister;
goto out_path;
}
P_INFO("open, established connection to *MONITOR service\n\n");
filp->private_data = monpriv;
return nonseekable_open(inode, filp);
out_unregister:
iucv_unregister_program(monpriv->iucv_handle);
out_error:
for (i = 0; i < MON_MSGLIM; i++)
kfree(monpriv->msg_array[i]);
kfree(monpriv);
out_path:
kfree(monpriv->path);
out_priv:
mon_free_mem(monpriv);
out_use:
clear_bit(MON_IN_USE, &mon_in_use);
out:
return rc;
}
static int
mon_close(struct inode *inode, struct file *filp)
static int mon_close(struct inode *inode, struct file *filp)
{
int rc, i;
struct mon_private *monpriv = filp->private_data;
......@@ -469,18 +447,12 @@ mon_close(struct inode *inode, struct file *filp)
/*
* Close IUCV connection and unregister
*/
rc = iucv_sever(monpriv->pathid, user_data_sever);
rc = iucv_path_sever(monpriv->path, user_data_sever);
if (rc)
P_ERROR("close, iucv_sever failed with rc = %i\n", rc);
else
P_INFO("close, terminated connection to *MONITOR service\n");
rc = iucv_unregister_program(monpriv->iucv_handle);
if (rc)
P_ERROR("close, iucv_unregister failed with rc = %i\n", rc);
else
P_INFO("close, unregistered with IUCV\n");
atomic_set(&monpriv->iucv_severed, 0);
atomic_set(&monpriv->iucv_connected, 0);
atomic_set(&monpriv->read_ready, 0);
......@@ -495,8 +467,8 @@ mon_close(struct inode *inode, struct file *filp)
return 0;
}
static ssize_t
mon_read(struct file *filp, char __user *data, size_t count, loff_t *ppos)
static ssize_t mon_read(struct file *filp, char __user *data,
size_t count, loff_t *ppos)
{
struct mon_private *monpriv = filp->private_data;
struct mon_msg *monmsg;
......@@ -563,8 +535,7 @@ out_copy:
return count;
}
static unsigned int
mon_poll(struct file *filp, struct poll_table_struct *p)
static unsigned int mon_poll(struct file *filp, struct poll_table_struct *p)
{
struct mon_private *monpriv = filp->private_data;
......@@ -593,8 +564,7 @@ static struct miscdevice mon_dev = {
/******************************************************************************
* module init/exit *
*****************************************************************************/
static int __init
mon_init(void)
static int __init mon_init(void)
{
int rc;
......@@ -603,22 +573,34 @@ mon_init(void)
return -ENODEV;
}
/*
* Register with IUCV and connect to *MONITOR service
*/
rc = iucv_register(&monreader_iucv_handler, 1);
if (rc) {
P_ERROR("failed to register with iucv driver\n");
return rc;
}
P_INFO("open, registered with IUCV\n");
rc = segment_type(mon_dcss_name);
if (rc < 0) {
mon_segment_warn(rc, mon_dcss_name);
return rc;
goto out_iucv;
}
if (rc != SEG_TYPE_SC) {
P_ERROR("segment %s has unsupported type, should be SC\n",
mon_dcss_name);
return -EINVAL;
rc = -EINVAL;
goto out_iucv;
}
rc = segment_load(mon_dcss_name, SEGMENT_SHARED,
&mon_dcss_start, &mon_dcss_end);
if (rc < 0) {
mon_segment_warn(rc, mon_dcss_name);
return -EINVAL;
rc = -EINVAL;
goto out_iucv;
}
dcss_mkname(mon_dcss_name, &user_data_connect[8]);
......@@ -634,14 +616,16 @@ mon_init(void)
out:
segment_unload(mon_dcss_name);
out_iucv:
iucv_unregister(&monreader_iucv_handler, 1);
return rc;
}
static void __exit
mon_exit(void)
static void __exit mon_exit(void)
{
segment_unload(mon_dcss_name);
WARN_ON(misc_deregister(&mon_dev) != 0);
iucv_unregister(&monreader_iucv_handler, 1);
return;
}
......
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