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linux/drivers/s390/net/claw.c
Peter Oberparleiter 23d805b647 [S390] cio: introduce fcx enabled scsw format 
Extend the scsw data structure to the format required by fcx. Also
provide helper functions for easier access to fields which are present
in both the traditional as well as the modified format.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2008-07-14 10:02:07 +02:00

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152 KiB
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/*
* drivers/s390/net/claw.c
* ESCON CLAW network driver
*
* Linux for zSeries version
* Copyright (C) 2002,2005 IBM Corporation
* Author(s) Original code written by:
* Kazuo Iimura (iimura@jp.ibm.com)
* Rewritten by
* Andy Richter (richtera@us.ibm.com)
* Marc Price (mwprice@us.ibm.com)
*
* sysfs parms:
* group x.x.rrrr,x.x.wwww
* read_buffer nnnnnnn
* write_buffer nnnnnn
* host_name aaaaaaaa
* adapter_name aaaaaaaa
* api_type aaaaaaaa
*
* eg.
* group 0.0.0200 0.0.0201
* read_buffer 25
* write_buffer 20
* host_name LINUX390
* adapter_name RS6K
* api_type TCPIP
*
* where
*
* The device id is decided by the order entries
* are added to the group the first is claw0 the second claw1
* up to CLAW_MAX_DEV
*
* rrrr - the first of 2 consecutive device addresses used for the
* CLAW protocol.
* The specified address is always used as the input (Read)
* channel and the next address is used as the output channel.
*
* wwww - the second of 2 consecutive device addresses used for
* the CLAW protocol.
* The specified address is always used as the output
* channel and the previous address is used as the input channel.
*
* read_buffer - specifies number of input buffers to allocate.
* write_buffer - specifies number of output buffers to allocate.
* host_name - host name
* adaptor_name - adaptor name
* api_type - API type TCPIP or API will be sent and expected
* as ws_name
*
* Note the following requirements:
* 1) host_name must match the configured adapter_name on the remote side
* 2) adaptor_name must match the configured host name on the remote side
*
* Change History
* 1.00 Initial release shipped
* 1.10 Changes for Buffer allocation
* 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
* 1.25 Added Packing support
*/
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include <asm/debug.h>
#include <asm/idals.h>
#include <asm/io.h>
#include <linux/bitops.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/tcp.h>
#include <linux/timer.h>
#include <linux/types.h>
#include "cu3088.h"
#include "claw.h"
MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
"Copyright 2000,2005 IBM Corporation\n");
MODULE_LICENSE("GPL");
/* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE options:
DEBUGMSG - Enables output of various debug messages in the code
IOTRACE - Enables output of CCW and other IO related traces
FUNCTRACE - Enables output of function entry/exit trace
Define any combination of above options to enable tracing
CLAW also uses the s390dbf file system see claw_trace and claw_setup
*/
/* following enables tracing */
//#define DEBUGMSG
//#define IOTRACE
//#define FUNCTRACE
#ifdef DEBUGMSG
#define DEBUG
#endif
#ifdef IOTRACE
#define DEBUG
#endif
#ifdef FUNCTRACE
#define DEBUG
#endif
static char debug_buffer[255];
/**
* Debug Facility Stuff
*/
static debug_info_t *claw_dbf_setup;
static debug_info_t *claw_dbf_trace;
/**
* CLAW Debug Facility functions
*/
static void
claw_unregister_debug_facility(void)
{
if (claw_dbf_setup)
debug_unregister(claw_dbf_setup);
if (claw_dbf_trace)
debug_unregister(claw_dbf_trace);
}
static int
claw_register_debug_facility(void)
{
claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
printk(KERN_WARNING "Not enough memory for debug facility.\n");
claw_unregister_debug_facility();
return -ENOMEM;
}
debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
debug_set_level(claw_dbf_setup, 2);
debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
debug_set_level(claw_dbf_trace, 2);
return 0;
}
static inline void
claw_set_busy(struct net_device *dev)
{
((struct claw_privbk *) dev->priv)->tbusy=1;
eieio();
}
static inline void
claw_clear_busy(struct net_device *dev)
{
clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
netif_wake_queue(dev);
eieio();
}
static inline int
claw_check_busy(struct net_device *dev)
{
eieio();
return ((struct claw_privbk *) dev->priv)->tbusy;
}
static inline void
claw_setbit_busy(int nr,struct net_device *dev)
{
netif_stop_queue(dev);
set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
}
static inline void
claw_clearbit_busy(int nr,struct net_device *dev)
{
clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
netif_wake_queue(dev);
}
static inline int
claw_test_and_setbit_busy(int nr,struct net_device *dev)
{
netif_stop_queue(dev);
return test_and_set_bit(nr,
(void *)&(((struct claw_privbk *) dev->priv)->tbusy));
}
/* Functions for the DEV methods */
static int claw_probe(struct ccwgroup_device *cgdev);
static void claw_remove_device(struct ccwgroup_device *cgdev);
static void claw_purge_skb_queue(struct sk_buff_head *q);
static int claw_new_device(struct ccwgroup_device *cgdev);
static int claw_shutdown_device(struct ccwgroup_device *cgdev);
static int claw_tx(struct sk_buff *skb, struct net_device *dev);
static int claw_change_mtu( struct net_device *dev, int new_mtu);
static int claw_open(struct net_device *dev);
static void claw_irq_handler(struct ccw_device *cdev,
unsigned long intparm, struct irb *irb);
static void claw_irq_tasklet ( unsigned long data );
static int claw_release(struct net_device *dev);
static void claw_write_retry ( struct chbk * p_ch );
static void claw_write_next ( struct chbk * p_ch );
static void claw_timer ( struct chbk * p_ch );
/* Functions */
static int add_claw_reads(struct net_device *dev,
struct ccwbk* p_first, struct ccwbk* p_last);
static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
static int find_link(struct net_device *dev, char *host_name, char *ws_name );
static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
static int init_ccw_bk(struct net_device *dev);
static void probe_error( struct ccwgroup_device *cgdev);
static struct net_device_stats *claw_stats(struct net_device *dev);
static int pages_to_order_of_mag(int num_of_pages);
static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
#ifdef DEBUG
static void dumpit (char *buf, int len);
#endif
/* sysfs Functions */
static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
static int claw_add_files(struct device *dev);
static void claw_remove_files(struct device *dev);
/* Functions for System Validate */
static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
__u8 correlator, __u8 rc , char *local_name, char *remote_name);
static int claw_snd_conn_req(struct net_device *dev, __u8 link);
static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
static int claw_snd_sys_validate_rsp(struct net_device *dev,
struct clawctl * p_ctl, __u32 return_code);
static int claw_strt_conn_req(struct net_device *dev );
static void claw_strt_read ( struct net_device *dev, int lock );
static void claw_strt_out_IO( struct net_device *dev );
static void claw_free_wrt_buf( struct net_device *dev );
/* Functions for unpack reads */
static void unpack_read (struct net_device *dev );
/* ccwgroup table */
static struct ccwgroup_driver claw_group_driver = {
.owner = THIS_MODULE,
.name = "claw",
.max_slaves = 2,
.driver_id = 0xC3D3C1E6,
.probe = claw_probe,
.remove = claw_remove_device,
.set_online = claw_new_device,
.set_offline = claw_shutdown_device,
};
/*
*
* Key functions
*/
/*----------------------------------------------------------------*
* claw_probe *
* this function is called for each CLAW device. *
*----------------------------------------------------------------*/
static int
claw_probe(struct ccwgroup_device *cgdev)
{
int rc;
struct claw_privbk *privptr=NULL;
#ifdef FUNCTRACE
printk(KERN_INFO "%s Enter\n",__func__);
#endif
CLAW_DBF_TEXT(2,setup,"probe");
if (!get_device(&cgdev->dev))
return -ENODEV;
#ifdef DEBUGMSG
printk(KERN_INFO "claw: variable cgdev =\n");
dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
#endif
privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
if (privptr == NULL) {
probe_error(cgdev);
put_device(&cgdev->dev);
printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
cgdev->cdev[0]->dev.bus_id,__func__,__LINE__);
CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
return -ENOMEM;
}
privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
probe_error(cgdev);
put_device(&cgdev->dev);
printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
cgdev->cdev[0]->dev.bus_id,__func__,__LINE__);
CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
return -ENOMEM;
}
memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
privptr->p_env->packing = 0;
privptr->p_env->write_buffers = 5;
privptr->p_env->read_buffers = 5;
privptr->p_env->read_size = CLAW_FRAME_SIZE;
privptr->p_env->write_size = CLAW_FRAME_SIZE;
rc = claw_add_files(&cgdev->dev);
if (rc) {
probe_error(cgdev);
put_device(&cgdev->dev);
printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
cgdev->cdev[0]->dev.bus_id,__func__,__LINE__);
CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
return rc;
}
printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
privptr->p_env->p_priv = privptr;
cgdev->cdev[0]->handler = claw_irq_handler;
cgdev->cdev[1]->handler = claw_irq_handler;
cgdev->dev.driver_data = privptr;
#ifdef FUNCTRACE
printk(KERN_INFO "claw:%s exit on line %d, "
"rc = 0\n",__func__,__LINE__);
#endif
CLAW_DBF_TEXT(2,setup,"prbext 0");
return 0;
} /* end of claw_probe */
/*-------------------------------------------------------------------*
* claw_tx *
*-------------------------------------------------------------------*/
static int
claw_tx(struct sk_buff *skb, struct net_device *dev)
{
int rc;
struct claw_privbk *privptr=dev->priv;
unsigned long saveflags;
struct chbk *p_ch;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s enter\n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"claw_tx");
p_ch=&privptr->channel[WRITE];
if (skb == NULL) {
printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
dev->name);
privptr->stats.tx_dropped++;
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
dev->name,__func__, __LINE__);
#endif
CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
return -EIO;
}
#ifdef IOTRACE
printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
dumpit((char *) skb, sizeof(struct sk_buff));
printk(KERN_INFO "%s: variable dev=\n",dev->name);
dumpit((char *) dev, sizeof(struct net_device));
#endif
spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
rc=claw_hw_tx( skb, dev, 1 );
spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
dev->name, __func__, __LINE__, rc);
#endif
CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
return rc;
} /* end of claw_tx */
/*------------------------------------------------------------------*
* pack the collect queue into an skb and return it *
* If not packing just return the top skb from the queue *
*------------------------------------------------------------------*/
static struct sk_buff *
claw_pack_skb(struct claw_privbk *privptr)
{
struct sk_buff *new_skb,*held_skb;
struct chbk *p_ch = &privptr->channel[WRITE];
struct claw_env *p_env = privptr->p_env;
int pkt_cnt,pk_ind,so_far;
new_skb = NULL; /* assume no dice */
pkt_cnt = 0;
CLAW_DBF_TEXT(4,trace,"PackSKBe");
if (!skb_queue_empty(&p_ch->collect_queue)) {
/* some data */
held_skb = skb_dequeue(&p_ch->collect_queue);
if (held_skb)
dev_kfree_skb_any(held_skb);
else
return NULL;
if (p_env->packing != DO_PACKED)
return held_skb;
/* get a new SKB we will pack at least one */
new_skb = dev_alloc_skb(p_env->write_size);
if (new_skb == NULL) {
atomic_inc(&held_skb->users);
skb_queue_head(&p_ch->collect_queue,held_skb);
return NULL;
}
/* we have packed packet and a place to put it */
pk_ind = 1;
so_far = 0;
new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
while ((pk_ind) && (held_skb != NULL)) {
if (held_skb->len+so_far <= p_env->write_size-8) {
memcpy(skb_put(new_skb,held_skb->len),
held_skb->data,held_skb->len);
privptr->stats.tx_packets++;
so_far += held_skb->len;
pkt_cnt++;
dev_kfree_skb_any(held_skb);
held_skb = skb_dequeue(&p_ch->collect_queue);
if (held_skb)
atomic_dec(&held_skb->users);
} else {
pk_ind = 0;
atomic_inc(&held_skb->users);
skb_queue_head(&p_ch->collect_queue,held_skb);
}
}
#ifdef IOTRACE
printk(KERN_INFO "%s: %s() Packed %d len %d\n",
p_env->ndev->name,
__func__,pkt_cnt,new_skb->len);
#endif
}
CLAW_DBF_TEXT(4,trace,"PackSKBx");
return new_skb;
}
/*-------------------------------------------------------------------*
* claw_change_mtu *
* *
*-------------------------------------------------------------------*/
static int
claw_change_mtu(struct net_device *dev, int new_mtu)
{
struct claw_privbk *privptr=dev->priv;
int buff_size;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter \n",dev->name,__func__);
#endif
#ifdef DEBUGMSG
printk(KERN_INFO "variable dev =\n");
dumpit((char *) dev, sizeof(struct net_device));
printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
#endif
CLAW_DBF_TEXT(4,trace,"setmtu");
buff_size = privptr->p_env->write_size;
if ((new_mtu < 60) || (new_mtu > buff_size)) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
dev->name,
__func__, __LINE__);
#endif
return -EINVAL;
}
dev->mtu = new_mtu;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
__func__, __LINE__);
#endif
return 0;
} /* end of claw_change_mtu */
/*-------------------------------------------------------------------*
* claw_open *
* *
*-------------------------------------------------------------------*/
static int
claw_open(struct net_device *dev)
{
int rc;
int i;
unsigned long saveflags=0;
unsigned long parm;
struct claw_privbk *privptr;
DECLARE_WAITQUEUE(wait, current);
struct timer_list timer;
struct ccwbk *p_buf;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter \n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"open");
if (!dev || (dev->name[0] == 0x00)) {
CLAW_DBF_TEXT(2,trace,"BadDev");
printk(KERN_WARNING "claw: Bad device at open failing \n");
return -ENODEV;
}
privptr = (struct claw_privbk *)dev->priv;
/* allocate and initialize CCW blocks */
if (privptr->buffs_alloc == 0) {
rc=init_ccw_bk(dev);
if (rc) {
printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
dev->name,
__func__, __LINE__);
CLAW_DBF_TEXT(2,trace,"openmem");
return -ENOMEM;
}
}
privptr->system_validate_comp=0;
privptr->release_pend=0;
if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
privptr->p_env->read_size=DEF_PACK_BUFSIZE;
privptr->p_env->write_size=DEF_PACK_BUFSIZE;
privptr->p_env->packing=PACKING_ASK;
} else {
privptr->p_env->packing=0;
privptr->p_env->read_size=CLAW_FRAME_SIZE;
privptr->p_env->write_size=CLAW_FRAME_SIZE;
}
claw_set_busy(dev);
tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
(unsigned long) &privptr->channel[READ]);
for ( i = 0; i < 2; i++) {
CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
init_waitqueue_head(&privptr->channel[i].wait);
/* skb_queue_head_init(&p_ch->io_queue); */
if (i == WRITE)
skb_queue_head_init(
&privptr->channel[WRITE].collect_queue);
privptr->channel[i].flag_a = 0;
privptr->channel[i].IO_active = 0;
privptr->channel[i].flag &= ~CLAW_TIMER;
init_timer(&timer);
timer.function = (void *)claw_timer;
timer.data = (unsigned long)(&privptr->channel[i]);
timer.expires = jiffies + 15*HZ;
add_timer(&timer);
spin_lock_irqsave(get_ccwdev_lock(
privptr->channel[i].cdev), saveflags);
parm = (unsigned long) &privptr->channel[i];
privptr->channel[i].claw_state = CLAW_START_HALT_IO;
rc = 0;
add_wait_queue(&privptr->channel[i].wait, &wait);
rc = ccw_device_halt(
(struct ccw_device *)privptr->channel[i].cdev,parm);
set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_irqrestore(
get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
schedule();
set_current_state(TASK_RUNNING);
remove_wait_queue(&privptr->channel[i].wait, &wait);
if(rc != 0)
ccw_check_return_code(privptr->channel[i].cdev, rc);
if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
del_timer(&timer);
}
if ((((privptr->channel[READ].last_dstat |
privptr->channel[WRITE].last_dstat) &
~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
(((privptr->channel[READ].flag |
privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
#ifdef DEBUGMSG
printk(KERN_INFO "%s: channel problems during open - read:"
" %02x - write: %02x\n",
dev->name,
privptr->channel[READ].last_dstat,
privptr->channel[WRITE].last_dstat);
#endif
printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
CLAW_DBF_TEXT(2,trace,"notrdy");
for ( i = 0; i < 2; i++) {
spin_lock_irqsave(
get_ccwdev_lock(privptr->channel[i].cdev),
saveflags);
parm = (unsigned long) &privptr->channel[i];
privptr->channel[i].claw_state = CLAW_STOP;
rc = ccw_device_halt(
(struct ccw_device *)&privptr->channel[i].cdev,
parm);
spin_unlock_irqrestore(
get_ccwdev_lock(privptr->channel[i].cdev),
saveflags);
if (rc != 0) {
ccw_check_return_code(
privptr->channel[i].cdev, rc);
}
}
free_pages((unsigned long)privptr->p_buff_ccw,
(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
if (privptr->p_env->read_size < PAGE_SIZE) {
free_pages((unsigned long)privptr->p_buff_read,
(int)pages_to_order_of_mag(
privptr->p_buff_read_num));
}
else {
p_buf=privptr->p_read_active_first;
while (p_buf!=NULL) {
free_pages((unsigned long)p_buf->p_buffer,
(int)pages_to_order_of_mag(
privptr->p_buff_pages_perread ));
p_buf=p_buf->next;
}
}
if (privptr->p_env->write_size < PAGE_SIZE ) {
free_pages((unsigned long)privptr->p_buff_write,
(int)pages_to_order_of_mag(
privptr->p_buff_write_num));
}
else {
p_buf=privptr->p_write_active_first;
while (p_buf!=NULL) {
free_pages((unsigned long)p_buf->p_buffer,
(int)pages_to_order_of_mag(
privptr->p_buff_pages_perwrite ));
p_buf=p_buf->next;
}
}
privptr->buffs_alloc = 0;
privptr->channel[READ].flag= 0x00;
privptr->channel[WRITE].flag = 0x00;
privptr->p_buff_ccw=NULL;
privptr->p_buff_read=NULL;
privptr->p_buff_write=NULL;
claw_clear_busy(dev);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(2,trace,"open EIO");
return -EIO;
}
/* Send SystemValidate command */
claw_clear_busy(dev);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"openok");
return 0;
} /* end of claw_open */
/*-------------------------------------------------------------------*
* *
* claw_irq_handler *
* *
*--------------------------------------------------------------------*/
static void
claw_irq_handler(struct ccw_device *cdev,
unsigned long intparm, struct irb *irb)
{
struct chbk *p_ch = NULL;
struct claw_privbk *privptr = NULL;
struct net_device *dev = NULL;
struct claw_env *p_env;
struct chbk *p_ch_r=NULL;
#ifdef FUNCTRACE
printk(KERN_INFO "%s enter \n",__func__);
#endif
CLAW_DBF_TEXT(4,trace,"clawirq");
/* Bypass all 'unsolicited interrupts' */
if (!cdev->dev.driver_data) {
printk(KERN_WARNING "claw: unsolicited interrupt for device:"
"%s received c-%02x d-%02x\n",
cdev->dev.bus_id, irb->scsw.cmd.cstat,
irb->scsw.cmd.dstat);
#ifdef FUNCTRACE
printk(KERN_INFO "claw: %s() "
"exit on line %d\n",__func__,__LINE__);
#endif
CLAW_DBF_TEXT(2,trace,"badirq");
return;
}
privptr = (struct claw_privbk *)cdev->dev.driver_data;
/* Try to extract channel from driver data. */
if (privptr->channel[READ].cdev == cdev)
p_ch = &privptr->channel[READ];
else if (privptr->channel[WRITE].cdev == cdev)
p_ch = &privptr->channel[WRITE];
else {
printk(KERN_WARNING "claw: Can't determine channel for "
"interrupt, device %s\n", cdev->dev.bus_id);
CLAW_DBF_TEXT(2,trace,"badchan");
return;
}
CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
dev = (struct net_device *) (p_ch->ndev);
p_env=privptr->p_env;
#ifdef IOTRACE
printk(KERN_INFO "%s: interrupt for device: %04x "
"received c-%02x d-%02x state-%02x\n",
dev->name, p_ch->devno, irb->scsw.cmd.cstat,
irb->scsw.cmd.dstat, p_ch->claw_state);
#endif
/* Copy interruption response block. */
memcpy(p_ch->irb, irb, sizeof(struct irb));
/* Check for good subchannel return code, otherwise error message */
if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
printk(KERN_INFO "%s: subchannel check for device: %04x -"
" Sch Stat %02x Dev Stat %02x CPA - %04x\n",
dev->name, p_ch->devno,
irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
irb->scsw.cmd.cpa);
#ifdef IOTRACE
dumpit((char *)irb,sizeof(struct irb));
dumpit((char *)(unsigned long)irb->scsw.cmd.cpa,
sizeof(struct ccw1));
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(2,trace,"chanchk");
/* return; */
}
/* Check the reason-code of a unit check */
if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
ccw_check_unit_check(p_ch, irb->ecw[0]);
/* State machine to bring the connection up, down and to restart */
p_ch->last_dstat = irb->scsw.cmd.dstat;
switch (p_ch->claw_state) {
case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
#endif
if (!((p_ch->irb->scsw.cmd.stctl &
SCSW_STCTL_SEC_STATUS) ||
(p_ch->irb->scsw.cmd.stctl ==
SCSW_STCTL_STATUS_PEND) ||
(p_ch->irb->scsw.cmd.stctl ==
(SCSW_STCTL_ALERT_STATUS |
SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return;
}
wake_up(&p_ch->wait); /* wake up claw_release */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"stop");
return;
case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
dev->name);
#endif
if (!((p_ch->irb->scsw.cmd.stctl &
SCSW_STCTL_SEC_STATUS) ||
(p_ch->irb->scsw.cmd.stctl ==
SCSW_STCTL_STATUS_PEND) ||
(p_ch->irb->scsw.cmd.stctl ==
(SCSW_STCTL_ALERT_STATUS |
SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"haltio");
return;
}
if (p_ch->flag == CLAW_READ) {
p_ch->claw_state = CLAW_START_READ;
wake_up(&p_ch->wait); /* wake claw_open (READ)*/
}
else
if (p_ch->flag == CLAW_WRITE) {
p_ch->claw_state = CLAW_START_WRITE;
/* send SYSTEM_VALIDATE */
claw_strt_read(dev, LOCK_NO);
claw_send_control(dev,
SYSTEM_VALIDATE_REQUEST,
0, 0, 0,
p_env->host_name,
p_env->adapter_name );
} else {
printk(KERN_WARNING "claw: unsolicited "
"interrupt for device:"
"%s received c-%02x d-%02x\n",
cdev->dev.bus_id,
irb->scsw.cmd.cstat,
irb->scsw.cmd.dstat);
return;
}
#ifdef DEBUGMSG
printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
dev->name);
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"haltio");
return;
case CLAW_START_READ:
CLAW_DBF_TEXT(4,trace,"ReadIRQ");
if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
clear_bit(0, (void *)&p_ch->IO_active);
if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
(p_ch->irb->ecw[0] & 0x40) == 0x40 ||
(p_ch->irb->ecw[0]) == 0)
{
privptr->stats.rx_errors++;
printk(KERN_INFO "%s: Restart is "
"required after remote "
"side recovers \n",
dev->name);
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"notrdy");
return;
}
if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
(p_ch->irb->scsw.cmd.dstat == 0)) {
if (test_and_set_bit(CLAW_BH_ACTIVE,
(void *)&p_ch->flag_a) == 0) {
tasklet_schedule(&p_ch->tasklet);
}
else {
CLAW_DBF_TEXT(4,trace,"PCINoBH");
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"PCI_read");
return;
}
if (!((p_ch->irb->scsw.cmd.stctl &
SCSW_STCTL_SEC_STATUS) ||
(p_ch->irb->scsw.cmd.stctl ==
SCSW_STCTL_STATUS_PEND) ||
(p_ch->irb->scsw.cmd.stctl ==
(SCSW_STCTL_ALERT_STATUS |
SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"SPend_rd");
return;
}
clear_bit(0, (void *)&p_ch->IO_active);
claw_clearbit_busy(TB_RETRY,dev);
if (test_and_set_bit(CLAW_BH_ACTIVE,
(void *)&p_ch->flag_a) == 0) {
tasklet_schedule(&p_ch->tasklet);
}
else {
CLAW_DBF_TEXT(4,trace,"RdBHAct");
}
#ifdef DEBUGMSG
printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
dev->name);
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"RdIRQXit");
return;
case CLAW_START_WRITE:
if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
printk(KERN_INFO "%s: Unit Check Occured in "
"write channel\n",dev->name);
clear_bit(0, (void *)&p_ch->IO_active);
if (p_ch->irb->ecw[0] & 0x80 ) {
printk(KERN_INFO "%s: Resetting Event "
"occurred:\n",dev->name);
init_timer(&p_ch->timer);
p_ch->timer.function =
(void *)claw_write_retry;
p_ch->timer.data = (unsigned long)p_ch;
p_ch->timer.expires = jiffies + 10*HZ;
add_timer(&p_ch->timer);
printk(KERN_INFO "%s: write connection "
"restarting\n",dev->name);
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"rstrtwrt");
return;
}
if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
clear_bit(0, (void *)&p_ch->IO_active);
printk(KERN_INFO "%s: Unit Exception "
"Occured in write channel\n",
dev->name);
}
if (!((p_ch->irb->scsw.cmd.stctl &
SCSW_STCTL_SEC_STATUS) ||
(p_ch->irb->scsw.cmd.stctl ==
SCSW_STCTL_STATUS_PEND) ||
(p_ch->irb->scsw.cmd.stctl ==
(SCSW_STCTL_ALERT_STATUS |
SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"writeUE");
return;
}
clear_bit(0, (void *)&p_ch->IO_active);
if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
claw_write_next(p_ch);
claw_clearbit_busy(TB_TX,dev);
claw_clear_busy(dev);
}
p_ch_r=(struct chbk *)&privptr->channel[READ];
if (test_and_set_bit(CLAW_BH_ACTIVE,
(void *)&p_ch_r->flag_a) == 0) {
tasklet_schedule(&p_ch_r->tasklet);
}
#ifdef DEBUGMSG
printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
dev->name);
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"StWtExit");
return;
default:
printk(KERN_WARNING "%s: wrong selection code - irq "
"state=%d\n",dev->name,p_ch->claw_state);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(2,trace,"badIRQ");
return;
}
} /* end of claw_irq_handler */
/*-------------------------------------------------------------------*
* claw_irq_tasklet *
* *
*--------------------------------------------------------------------*/
static void
claw_irq_tasklet ( unsigned long data )
{
struct chbk * p_ch;
struct net_device *dev;
struct claw_privbk * privptr;
p_ch = (struct chbk *) data;
dev = (struct net_device *)p_ch->ndev;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter \n",dev->name,__func__);
#endif
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
dumpit((char *) p_ch, sizeof(struct chbk));
#endif
CLAW_DBF_TEXT(4,trace,"IRQtask");
privptr = (struct claw_privbk *) dev->priv;
#ifdef DEBUGMSG
printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
dev->name, p_ch->claw_state);
#endif
unpack_read(dev);
clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
CLAW_DBF_TEXT(4,trace,"TskletXt");
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return;
} /* end of claw_irq_bh */
/*-------------------------------------------------------------------*
* claw_release *
* *
*--------------------------------------------------------------------*/
static int
claw_release(struct net_device *dev)
{
int rc;
int i;
unsigned long saveflags;
unsigned long parm;
struct claw_privbk *privptr;
DECLARE_WAITQUEUE(wait, current);
struct ccwbk* p_this_ccw;
struct ccwbk* p_buf;
if (!dev)
return 0;
privptr = (struct claw_privbk *) dev->priv;
if (!privptr)
return 0;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter \n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"release");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable dev =\n",dev->name);
dumpit((char *) dev, sizeof(struct net_device));
printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
#endif
privptr->release_pend=1;
claw_setbit_busy(TB_STOP,dev);
for ( i = 1; i >=0 ; i--) {
spin_lock_irqsave(
get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
/* del_timer(&privptr->channel[READ].timer); */
privptr->channel[i].claw_state = CLAW_STOP;
privptr->channel[i].IO_active = 0;
parm = (unsigned long) &privptr->channel[i];
if (i == WRITE)
claw_purge_skb_queue(
&privptr->channel[WRITE].collect_queue);
rc = ccw_device_halt (privptr->channel[i].cdev, parm);
if (privptr->system_validate_comp==0x00) /* never opened? */
init_waitqueue_head(&privptr->channel[i].wait);
add_wait_queue(&privptr->channel[i].wait, &wait);
set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_irqrestore(
get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
schedule();
set_current_state(TASK_RUNNING);
remove_wait_queue(&privptr->channel[i].wait, &wait);
if (rc != 0) {
ccw_check_return_code(privptr->channel[i].cdev, rc);
}
}
if (privptr->pk_skb != NULL) {
dev_kfree_skb_any(privptr->pk_skb);
privptr->pk_skb = NULL;
}
if(privptr->buffs_alloc != 1) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"none2fre");
return 0;
}
CLAW_DBF_TEXT(4,trace,"freebufs");
if (privptr->p_buff_ccw != NULL) {
free_pages((unsigned long)privptr->p_buff_ccw,
(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
}
CLAW_DBF_TEXT(4,trace,"freeread");
if (privptr->p_env->read_size < PAGE_SIZE) {
if (privptr->p_buff_read != NULL) {
free_pages((unsigned long)privptr->p_buff_read,
(int)pages_to_order_of_mag(privptr->p_buff_read_num));
}
}
else {
p_buf=privptr->p_read_active_first;
while (p_buf!=NULL) {
free_pages((unsigned long)p_buf->p_buffer,
(int)pages_to_order_of_mag(
privptr->p_buff_pages_perread ));
p_buf=p_buf->next;
}
}
CLAW_DBF_TEXT(4,trace,"freewrit");
if (privptr->p_env->write_size < PAGE_SIZE ) {
free_pages((unsigned long)privptr->p_buff_write,
(int)pages_to_order_of_mag(privptr->p_buff_write_num));
}
else {
p_buf=privptr->p_write_active_first;
while (p_buf!=NULL) {
free_pages((unsigned long)p_buf->p_buffer,
(int)pages_to_order_of_mag(
privptr->p_buff_pages_perwrite ));
p_buf=p_buf->next;
}
}
CLAW_DBF_TEXT(4,trace,"clearptr");
privptr->buffs_alloc = 0;
privptr->p_buff_ccw=NULL;
privptr->p_buff_read=NULL;
privptr->p_buff_write=NULL;
privptr->system_validate_comp=0;
privptr->release_pend=0;
/* Remove any writes that were pending and reset all reads */
p_this_ccw=privptr->p_read_active_first;
while (p_this_ccw!=NULL) {
p_this_ccw->header.length=0xffff;
p_this_ccw->header.opcode=0xff;
p_this_ccw->header.flag=0x00;
p_this_ccw=p_this_ccw->next;
}
while (privptr->p_write_active_first!=NULL) {
p_this_ccw=privptr->p_write_active_first;
p_this_ccw->header.flag=CLAW_PENDING;
privptr->p_write_active_first=p_this_ccw->next;
p_this_ccw->next=privptr->p_write_free_chain;
privptr->p_write_free_chain=p_this_ccw;
++privptr->write_free_count;
}
privptr->p_write_active_last=NULL;
privptr->mtc_logical_link = -1;
privptr->mtc_skipping = 1;
privptr->mtc_offset=0;
if (((privptr->channel[READ].last_dstat |
privptr->channel[WRITE].last_dstat) &
~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
printk(KERN_WARNING "%s: channel problems during close - "
"read: %02x - write: %02x\n",
dev->name,
privptr->channel[READ].last_dstat,
privptr->channel[WRITE].last_dstat);
CLAW_DBF_TEXT(2,trace,"badclose");
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"rlsexit");
return 0;
} /* end of claw_release */
/*-------------------------------------------------------------------*
* claw_write_retry *
* *
*--------------------------------------------------------------------*/
static void
claw_write_retry ( struct chbk *p_ch )
{
struct net_device *dev=p_ch->ndev;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",dev->name,__func__);
printk(KERN_INFO "claw: variable p_ch =\n");
dumpit((char *) p_ch, sizeof(struct chbk));
#endif
CLAW_DBF_TEXT(4,trace,"w_retry");
if (p_ch->claw_state == CLAW_STOP) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return;
}
#ifdef DEBUGMSG
printk( KERN_INFO "%s:%s state-%02x\n" ,
dev->name,
__func__,
p_ch->claw_state);
#endif
claw_strt_out_IO( dev );
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"rtry_xit");
return;
} /* end of claw_write_retry */
/*-------------------------------------------------------------------*
* claw_write_next *
* *
*--------------------------------------------------------------------*/
static void
claw_write_next ( struct chbk * p_ch )
{
struct net_device *dev;
struct claw_privbk *privptr=NULL;
struct sk_buff *pk_skb;
int rc;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter \n",p_ch->ndev->name,__func__);
printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
dumpit((char *) p_ch, sizeof(struct chbk));
#endif
CLAW_DBF_TEXT(4,trace,"claw_wrt");
if (p_ch->claw_state == CLAW_STOP)
return;
dev = (struct net_device *) p_ch->ndev;
privptr = (struct claw_privbk *) dev->priv;
claw_free_wrt_buf( dev );
if ((privptr->write_free_count > 0) &&
!skb_queue_empty(&p_ch->collect_queue)) {
pk_skb = claw_pack_skb(privptr);
while (pk_skb != NULL) {
rc = claw_hw_tx( pk_skb, dev,1);
if (privptr->write_free_count > 0) {
pk_skb = claw_pack_skb(privptr);
} else
pk_skb = NULL;
}
}
if (privptr->p_write_active_first!=NULL) {
claw_strt_out_IO(dev);
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return;
} /* end of claw_write_next */
/*-------------------------------------------------------------------*
* *
* claw_timer *
*--------------------------------------------------------------------*/
static void
claw_timer ( struct chbk * p_ch )
{
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__func__);
printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
dumpit((char *) p_ch, sizeof(struct chbk));
#endif
CLAW_DBF_TEXT(4,trace,"timer");
p_ch->flag |= CLAW_TIMER;
wake_up(&p_ch->wait);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
p_ch->ndev->name,__func__,__LINE__);
#endif
return;
} /* end of claw_timer */
/*
*
* functions
*/
/*-------------------------------------------------------------------*
* *
* pages_to_order_of_mag *
* *
* takes a number of pages from 1 to 512 and returns the *
* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
* of magnitude get_free_pages() has an upper order of 9 *
*--------------------------------------------------------------------*/
static int
pages_to_order_of_mag(int num_of_pages)
{
int order_of_mag=1; /* assume 2 pages */
int nump=2;
#ifdef FUNCTRACE
printk(KERN_INFO "%s Enter pages = %d \n",__func__,num_of_pages);
#endif
CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
/* 512 pages = 2Meg on 4k page systems */
if (num_of_pages >= 512) {return 9; }
/* we have two or more pages order is at least 1 */
for (nump=2 ;nump <= 512;nump*=2) {
if (num_of_pages <= nump)
break;
order_of_mag +=1;
}
if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
#ifdef FUNCTRACE
printk(KERN_INFO "%s Exit on line %d, order = %d\n",
__func__,__LINE__, order_of_mag);
#endif
CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
return order_of_mag;
}
/*-------------------------------------------------------------------*
* *
* add_claw_reads *
* *
*--------------------------------------------------------------------*/
static int
add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
struct ccwbk* p_last)
{
struct claw_privbk *privptr;
struct ccw1 temp_ccw;
struct endccw * p_end;
#ifdef IOTRACE
struct ccwbk* p_buf;
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter \n",dev->name,__func__);
#endif
#ifdef DEBUGMSG
printk(KERN_INFO "dev\n");
dumpit((char *) dev, sizeof(struct net_device));
printk(KERN_INFO "p_first\n");
dumpit((char *) p_first, sizeof(struct ccwbk));
printk(KERN_INFO "p_last\n");
dumpit((char *) p_last, sizeof(struct ccwbk));
#endif
CLAW_DBF_TEXT(4,trace,"addreads");
privptr = dev->priv;
p_end = privptr->p_end_ccw;
/* first CCW and last CCW contains a new set of read channel programs
* to apend the running channel programs
*/
if ( p_first==NULL) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"addexit");
return 0;
}
/* set up ending CCW sequence for this segment */
if (p_end->read1) {
p_end->read1=0x00; /* second ending CCW is now active */
/* reset ending CCWs and setup TIC CCWs */
p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
p_end->read2_nop2.cda=0;
p_end->read2_nop2.count=1;
}
else {
p_end->read1=0x01; /* first ending CCW is now active */
/* reset ending CCWs and setup TIC CCWs */
p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
p_end->read1_nop2.cda=0;
p_end->read1_nop2.count=1;
}
if ( privptr-> p_read_active_first ==NULL ) {
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s p_read_active_first == NULL \n",
dev->name,__func__);
printk(KERN_INFO "%s:%s Read active first/last changed \n",
dev->name,__func__);
#endif
privptr-> p_read_active_first= p_first; /* set new first */
privptr-> p_read_active_last = p_last; /* set new last */
}
else {
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s Read in progress \n",
dev->name,__func__);
#endif
/* set up TIC ccw */
temp_ccw.cda= (__u32)__pa(&p_first->read);
temp_ccw.count=0;
temp_ccw.flags=0;
temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
if (p_end->read1) {
/* first set of CCW's is chained to the new read */
/* chain, so the second set is chained to the active chain. */
/* Therefore modify the second set to point to the new */
/* read chain set up TIC CCWs */
/* make sure we update the CCW so channel doesn't fetch it */
/* when it's only half done */
memcpy( &p_end->read2_nop2, &temp_ccw ,
sizeof(struct ccw1));
privptr->p_read_active_last->r_TIC_1.cda=
(__u32)__pa(&p_first->read);
privptr->p_read_active_last->r_TIC_2.cda=
(__u32)__pa(&p_first->read);
}
else {
/* make sure we update the CCW so channel doesn't */
/* fetch it when it is only half done */
memcpy( &p_end->read1_nop2, &temp_ccw ,
sizeof(struct ccw1));
privptr->p_read_active_last->r_TIC_1.cda=
(__u32)__pa(&p_first->read);
privptr->p_read_active_last->r_TIC_2.cda=
(__u32)__pa(&p_first->read);
}
/* chain in new set of blocks */
privptr->p_read_active_last->next = p_first;
privptr->p_read_active_last=p_last;
} /* end of if ( privptr-> p_read_active_first ==NULL) */
#ifdef IOTRACE
printk(KERN_INFO "%s:%s dump p_last CCW BK \n",dev->name,__func__);
dumpit((char *)p_last, sizeof(struct ccwbk));
printk(KERN_INFO "%s:%s dump p_end CCW BK \n",dev->name,__func__);
dumpit((char *)p_end, sizeof(struct endccw));
printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__func__);
dumpit((char *)p_first, sizeof(struct ccwbk));
printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
dev->name,__func__);
p_buf=privptr->p_read_active_first;
while (p_buf!=NULL) {
dumpit((char *)p_buf, sizeof(struct ccwbk));
p_buf=p_buf->next;
}
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"addexit");
return 0;
} /* end of add_claw_reads */
/*-------------------------------------------------------------------*
* ccw_check_return_code *
* *
*-------------------------------------------------------------------*/
static void
ccw_check_return_code(struct ccw_device *cdev, int return_code)
{
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > enter \n",
cdev->dev.bus_id,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"ccwret");
#ifdef DEBUGMSG
printk(KERN_INFO "variable cdev =\n");
dumpit((char *) cdev, sizeof(struct ccw_device));
printk(KERN_INFO "variable return_code = %d\n",return_code);
#endif
if (return_code != 0) {
switch (return_code) {
case -EBUSY:
printk(KERN_INFO "%s: Busy !\n",
cdev->dev.bus_id);
break;
case -ENODEV:
printk(KERN_EMERG "%s: Missing device called "
"for IO ENODEV\n", cdev->dev.bus_id);
break;
case -EIO:
printk(KERN_EMERG "%s: Status pending... EIO \n",
cdev->dev.bus_id);
break;
case -EINVAL:
printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
cdev->dev.bus_id);
break;
default:
printk(KERN_EMERG "%s: Unknown error in "
"Do_IO %d\n",cdev->dev.bus_id, return_code);
}
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > exit on line %d\n",
cdev->dev.bus_id,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"ccwret");
} /* end of ccw_check_return_code */
/*-------------------------------------------------------------------*
* ccw_check_unit_check *
*--------------------------------------------------------------------*/
static void
ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
{
struct net_device *dev = p_ch->ndev;
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > enter\n",dev->name,__func__);
#endif
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable dev =\n",dev->name);
dumpit((char *)dev, sizeof(struct net_device));
printk(KERN_INFO "%s: variable sense =\n",dev->name);
dumpit((char *)&sense, 2);
#endif
CLAW_DBF_TEXT(4,trace,"unitchek");
printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
dev->name, sense);
if (sense & 0x40) {
if (sense & 0x01) {
printk(KERN_WARNING "%s: Interface disconnect or "
"Selective reset "
"occurred (remote side)\n", dev->name);
}
else {
printk(KERN_WARNING "%s: System reset occured"
" (remote side)\n", dev->name);
}
}
else if (sense & 0x20) {
if (sense & 0x04) {
printk(KERN_WARNING "%s: Data-streaming "
"timeout)\n", dev->name);
}
else {
printk(KERN_WARNING "%s: Data-transfer parity"
" error\n", dev->name);
}
}
else if (sense & 0x10) {
if (sense & 0x20) {
printk(KERN_WARNING "%s: Hardware malfunction "
"(remote side)\n", dev->name);
}
else {
printk(KERN_WARNING "%s: read-data parity error "
"(remote side)\n", dev->name);
}
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
} /* end of ccw_check_unit_check */
/*-------------------------------------------------------------------*
* Dump buffer format *
* *
*--------------------------------------------------------------------*/
#ifdef DEBUG
static void
dumpit(char* buf, int len)
{
__u32 ct, sw, rm, dup;
char *ptr, *rptr;
char tbuf[82], tdup[82];
#if (CONFIG_64BIT)
char addr[22];
#else
char addr[12];
#endif
char boff[12];
char bhex[82], duphex[82];
char basc[40];
sw = 0;
rptr =ptr=buf;
rm = 16;
duphex[0] = 0x00;
dup = 0;
for ( ct=0; ct < len; ct++, ptr++, rptr++ ) {
if (sw == 0) {
#if (CONFIG_64BIT)
sprintf(addr, "%16.16lX",(unsigned long)rptr);
#else
sprintf(addr, "%8.8X",(__u32)rptr);
#endif
sprintf(boff, "%4.4X", (__u32)ct);
bhex[0] = '\0';
basc[0] = '\0';
}
if ((sw == 4) || (sw == 12)) {
strcat(bhex, " ");
}
if (sw == 8) {
strcat(bhex, " ");
}
#if (CONFIG_64BIT)
sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
#else
sprintf(tbuf,"%2.2X", (__u32)*ptr);
#endif
tbuf[2] = '\0';
strcat(bhex, tbuf);
if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
basc[sw] = *ptr;
}
else {
basc[sw] = '.';
}
basc[sw+1] = '\0';
sw++;
rm--;
if (sw==16) {
if ((strcmp(duphex, bhex)) !=0) {
if (dup !=0) {
sprintf(tdup,"Duplicate as above to"
" %s", addr);
printk( KERN_INFO " "
" --- %s ---\n",tdup);
}
printk( KERN_INFO " %s (+%s) : %s [%s]\n",
addr, boff, bhex, basc);
dup = 0;
strcpy(duphex, bhex);
}
else {
dup++;
}
sw = 0;
rm = 16;
}
} /* endfor */
if (sw != 0) {
for ( ; rm > 0; rm--, sw++ ) {
if ((sw==4) || (sw==12)) strcat(bhex, " ");
if (sw==8) strcat(bhex, " ");
strcat(bhex, " ");
strcat(basc, " ");
}
if (dup !=0) {
sprintf(tdup,"Duplicate as above to %s", addr);
printk( KERN_INFO " --- %s ---\n",
tdup);
}
printk( KERN_INFO " %s (+%s) : %s [%s]\n",
addr, boff, bhex, basc);
}
else {
if (dup >=1) {
sprintf(tdup,"Duplicate as above to %s", addr);
printk( KERN_INFO " --- %s ---\n",
tdup);
}
if (dup !=0) {
printk( KERN_INFO " %s (+%s) : %s [%s]\n",
addr, boff, bhex, basc);
}
}
return;
} /* end of dumpit */
#endif
/*-------------------------------------------------------------------*
* find_link *
*--------------------------------------------------------------------*/
static int
find_link(struct net_device *dev, char *host_name, char *ws_name )
{
struct claw_privbk *privptr;
struct claw_env *p_env;
int rc=0;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s > enter \n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"findlink");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable dev = \n",dev->name);
dumpit((char *) dev, sizeof(struct net_device));
printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
#endif
privptr=dev->priv;
p_env=privptr->p_env;
switch (p_env->packing)
{
case PACKING_ASK:
if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
(memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
rc = EINVAL;
break;
case DO_PACKED:
case PACK_SEND:
if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
(memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
rc = EINVAL;
break;
default:
if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
(memcmp(p_env->api_type , ws_name, 8)!=0))
rc = EINVAL;
break;
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return 0;
} /* end of find_link */
/*-------------------------------------------------------------------*
* claw_hw_tx *
* *
* *
*-------------------------------------------------------------------*/
static int
claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
{
int rc=0;
struct claw_privbk *privptr;
struct ccwbk *p_this_ccw;
struct ccwbk *p_first_ccw;
struct ccwbk *p_last_ccw;
__u32 numBuffers;
signed long len_of_data;
unsigned long bytesInThisBuffer;
unsigned char *pDataAddress;
struct endccw *pEnd;
struct ccw1 tempCCW;
struct chbk *p_ch;
struct claw_env *p_env;
int lock;
struct clawph *pk_head;
struct chbk *ch;
#ifdef IOTRACE
struct ccwbk *p_buf;
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > enter\n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"hw_tx");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
dumpit((char *) skb, sizeof(struct sk_buff));
printk(KERN_INFO "%s: variable dev =\n",dev->name);
dumpit((char *) dev, sizeof(struct net_device));
printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
#endif
privptr = (struct claw_privbk *) (dev->priv);
p_ch=(struct chbk *)&privptr->channel[WRITE];
p_env =privptr->p_env;
#ifdef IOTRACE
printk(KERN_INFO "%s: %s() dump sk_buff \n",dev->name,__func__);
dumpit((char *)skb ,sizeof(struct sk_buff));
#endif
claw_free_wrt_buf(dev); /* Clean up free chain if posible */
/* scan the write queue to free any completed write packets */
p_first_ccw=NULL;
p_last_ccw=NULL;
if ((p_env->packing >= PACK_SEND) &&
(skb->cb[1] != 'P')) {
skb_push(skb,sizeof(struct clawph));
pk_head=(struct clawph *)skb->data;
pk_head->len=skb->len-sizeof(struct clawph);
if (pk_head->len%4) {
pk_head->len+= 4-(pk_head->len%4);
skb_pad(skb,4-(pk_head->len%4));
skb_put(skb,4-(pk_head->len%4));
}
if (p_env->packing == DO_PACKED)
pk_head->link_num = linkid;
else
pk_head->link_num = 0;
pk_head->flag = 0x00;
skb_pad(skb,4);
skb->cb[1] = 'P';
}
if (linkid == 0) {
if (claw_check_busy(dev)) {
if (privptr->write_free_count!=0) {
claw_clear_busy(dev);
}
else {
claw_strt_out_IO(dev );
claw_free_wrt_buf( dev );
if (privptr->write_free_count==0) {
#ifdef IOTRACE
printk(KERN_INFO "%s: "
"(claw_check_busy) no free write "
"buffers\n", dev->name);
#endif
ch = &privptr->channel[WRITE];
atomic_inc(&skb->users);
skb_queue_tail(&ch->collect_queue, skb);
goto Done;
}
else {
claw_clear_busy(dev);
}
}
}
/* tx lock */
if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: busy (claw_test_and_setbit_"
"busy)\n", dev->name);
#endif
ch = &privptr->channel[WRITE];
atomic_inc(&skb->users);
skb_queue_tail(&ch->collect_queue, skb);
claw_strt_out_IO(dev );
rc=-EBUSY;
goto Done2;
}
}
/* See how many write buffers are required to hold this data */
numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
/* If that number of buffers isn't available, give up for now */
if (privptr->write_free_count < numBuffers ||
privptr->p_write_free_chain == NULL ) {
claw_setbit_busy(TB_NOBUFFER,dev);
#ifdef DEBUGMSG
printk(KERN_INFO "%s: busy (claw_setbit_busy"
"(TB_NOBUFFER))\n", dev->name);
printk(KERN_INFO " free_count: %d, numBuffers : %d\n",
(int)privptr->write_free_count,(int) numBuffers );
#endif
ch = &privptr->channel[WRITE];
atomic_inc(&skb->users);
skb_queue_tail(&ch->collect_queue, skb);
CLAW_DBF_TEXT(2,trace,"clawbusy");
goto Done2;
}
pDataAddress=skb->data;
len_of_data=skb->len;
while (len_of_data > 0) {
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
dev->name ,__func__,len_of_data);
dumpit((char *)pDataAddress ,64);
#endif
p_this_ccw=privptr->p_write_free_chain; /* get a block */
if (p_this_ccw == NULL) { /* lost the race */
ch = &privptr->channel[WRITE];
atomic_inc(&skb->users);
skb_queue_tail(&ch->collect_queue, skb);
goto Done2;
}
privptr->p_write_free_chain=p_this_ccw->next;
p_this_ccw->next=NULL;
--privptr->write_free_count; /* -1 */
bytesInThisBuffer=len_of_data;
memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
len_of_data-=bytesInThisBuffer;
pDataAddress+=(unsigned long)bytesInThisBuffer;
/* setup write CCW */
p_this_ccw->write.cmd_code = (linkid * 8) +1;
if (len_of_data>0) {
p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
}
p_this_ccw->write.count=bytesInThisBuffer;
/* now add to end of this chain */
if (p_first_ccw==NULL) {
p_first_ccw=p_this_ccw;
}
if (p_last_ccw!=NULL) {
p_last_ccw->next=p_this_ccw;
/* set up TIC ccws */
p_last_ccw->w_TIC_1.cda=
(__u32)__pa(&p_this_ccw->write);
}
p_last_ccw=p_this_ccw; /* save new last block */
#ifdef IOTRACE
printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
dev->name,__func__,bytesInThisBuffer);
dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
dumpit((char *)p_this_ccw->p_buffer, 64);
#endif
}
/* FirstCCW and LastCCW now contain a new set of write channel
* programs to append to the running channel program
*/
if (p_first_ccw!=NULL) {
/* setup ending ccw sequence for this segment */
pEnd=privptr->p_end_ccw;
if (pEnd->write1) {
pEnd->write1=0x00; /* second end ccw is now active */
/* set up Tic CCWs */
p_last_ccw->w_TIC_1.cda=
(__u32)__pa(&pEnd->write2_nop1);
pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
pEnd->write2_nop2.flags =
CCW_FLAG_SLI | CCW_FLAG_SKIP;
pEnd->write2_nop2.cda=0;
pEnd->write2_nop2.count=1;
}
else { /* end of if (pEnd->write1)*/
pEnd->write1=0x01; /* first end ccw is now active */
/* set up Tic CCWs */
p_last_ccw->w_TIC_1.cda=
(__u32)__pa(&pEnd->write1_nop1);
pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
pEnd->write1_nop2.flags =
CCW_FLAG_SLI | CCW_FLAG_SKIP;
pEnd->write1_nop2.cda=0;
pEnd->write1_nop2.count=1;
} /* end if if (pEnd->write1) */
if (privptr->p_write_active_first==NULL ) {
privptr->p_write_active_first=p_first_ccw;
privptr->p_write_active_last=p_last_ccw;
}
else {
/* set up Tic CCWs */
tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
tempCCW.count=0;
tempCCW.flags=0;
tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
if (pEnd->write1) {
/*
* first set of ending CCW's is chained to the new write
* chain, so the second set is chained to the active chain
* Therefore modify the second set to point the new write chain.
* make sure we update the CCW atomically
* so channel does not fetch it when it's only half done
*/
memcpy( &pEnd->write2_nop2, &tempCCW ,
sizeof(struct ccw1));
privptr->p_write_active_last->w_TIC_1.cda=
(__u32)__pa(&p_first_ccw->write);
}
else {
/*make sure we update the CCW atomically
*so channel does not fetch it when it's only half done
*/
memcpy(&pEnd->write1_nop2, &tempCCW ,
sizeof(struct ccw1));
privptr->p_write_active_last->w_TIC_1.cda=
(__u32)__pa(&p_first_ccw->write);
} /* end if if (pEnd->write1) */
privptr->p_write_active_last->next=p_first_ccw;
privptr->p_write_active_last=p_last_ccw;
}
} /* endif (p_first_ccw!=NULL) */
#ifdef IOTRACE
printk(KERN_INFO "%s: %s() > Dump Active CCW chain \n",
dev->name,__func__);
p_buf=privptr->p_write_active_first;
while (p_buf!=NULL) {
dumpit((char *)p_buf, sizeof(struct ccwbk));
p_buf=p_buf->next;
}
p_buf=(struct ccwbk*)privptr->p_end_ccw;
dumpit((char *)p_buf, sizeof(struct endccw));
#endif
dev_kfree_skb_any(skb);
if (linkid==0) {
lock=LOCK_NO;
}
else {
lock=LOCK_YES;
}
claw_strt_out_IO(dev );
/* if write free count is zero , set NOBUFFER */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() > free_count is %d\n",
dev->name,__func__,
(int) privptr->write_free_count );
#endif
if (privptr->write_free_count==0) {
claw_setbit_busy(TB_NOBUFFER,dev);
}
Done2:
claw_clearbit_busy(TB_TX,dev);
Done:
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
dev->name,__func__,__LINE__, rc);
#endif
return(rc);
} /* end of claw_hw_tx */
/*-------------------------------------------------------------------*
* *
* init_ccw_bk *
* *
*--------------------------------------------------------------------*/
static int
init_ccw_bk(struct net_device *dev)
{
__u32 ccw_blocks_required;
__u32 ccw_blocks_perpage;
__u32 ccw_pages_required;
__u32 claw_reads_perpage=1;
__u32 claw_read_pages;
__u32 claw_writes_perpage=1;
__u32 claw_write_pages;
void *p_buff=NULL;
struct ccwbk*p_free_chain;
struct ccwbk*p_buf;
struct ccwbk*p_last_CCWB;
struct ccwbk*p_first_CCWB;
struct endccw *p_endccw=NULL;
addr_t real_address;
struct claw_privbk *privptr=dev->priv;
struct clawh *pClawH=NULL;
addr_t real_TIC_address;
int i,j;
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() enter \n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"init_ccw");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable dev =\n",dev->name);
dumpit((char *) dev, sizeof(struct net_device));
#endif
/* initialize statistics field */
privptr->active_link_ID=0;
/* initialize ccwbk pointers */
privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
privptr->p_end_ccw=NULL; /* pointer to ending ccw */
privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
privptr->buffs_alloc = 0;
memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
/* initialize free write ccwbk counter */
privptr->write_free_count=0; /* number of free bufs on write chain */
p_last_CCWB = NULL;
p_first_CCWB= NULL;
/*
* We need 1 CCW block for each read buffer, 1 for each
* write buffer, plus 1 for ClawSignalBlock
*/
ccw_blocks_required =
privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() "
"ccw_blocks_required=%d\n",
dev->name,__func__,
ccw_blocks_required);
printk(KERN_INFO "%s: %s() "
"PAGE_SIZE=0x%x\n",
dev->name,__func__,
(unsigned int)PAGE_SIZE);
printk(KERN_INFO "%s: %s() > "
"PAGE_MASK=0x%x\n",
dev->name,__func__,
(unsigned int)PAGE_MASK);
#endif
/*
* compute number of CCW blocks that will fit in a page
*/
ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
ccw_pages_required=
DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
dev->name,__func__,
ccw_blocks_perpage);
printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
dev->name,__func__,
ccw_pages_required);
#endif
/*
* read and write sizes are set by 2 constants in claw.h
* 4k and 32k. Unpacked values other than 4k are not going to
* provide good performance. With packing buffers support 32k
* buffers are used.
*/
if (privptr->p_env->read_size < PAGE_SIZE) {
claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
claw_reads_perpage);
}
else { /* > or equal */
privptr->p_buff_pages_perread =
DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
claw_read_pages = privptr->p_env->read_buffers *
privptr->p_buff_pages_perread;
}
if (privptr->p_env->write_size < PAGE_SIZE) {
claw_writes_perpage =
PAGE_SIZE / privptr->p_env->write_size;
claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
claw_writes_perpage);
}
else { /* > or equal */
privptr->p_buff_pages_perwrite =
DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
claw_write_pages = privptr->p_env->write_buffers *
privptr->p_buff_pages_perwrite;
}
#ifdef DEBUGMSG
if (privptr->p_env->read_size < PAGE_SIZE) {
printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
dev->name,__func__,
claw_reads_perpage);
}
else {
printk(KERN_INFO "%s: %s() pages_perread=%d\n",
dev->name,__func__,
privptr->p_buff_pages_perread);
}
printk(KERN_INFO "%s: %s() read_pages=%d\n",
dev->name,__func__,
claw_read_pages);
if (privptr->p_env->write_size < PAGE_SIZE) {
printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
dev->name,__func__,
claw_writes_perpage);
}
else {
printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
dev->name,__func__,
privptr->p_buff_pages_perwrite);
}
printk(KERN_INFO "%s: %s() write_pages=%d\n",
dev->name,__func__,
claw_write_pages);
#endif
/*
* allocate ccw_pages_required
*/
if (privptr->p_buff_ccw==NULL) {
privptr->p_buff_ccw=
(void *)__get_free_pages(__GFP_DMA,
(int)pages_to_order_of_mag(ccw_pages_required ));
if (privptr->p_buff_ccw==NULL) {
printk(KERN_INFO "%s: %s() "
"__get_free_pages for CCWs failed : "
"pages is %d\n",
dev->name,__func__,
ccw_pages_required );
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > "
"exit on line %d, rc = ENOMEM\n",
dev->name,__func__,
__LINE__);
#endif
return -ENOMEM;
}
privptr->p_buff_ccw_num=ccw_pages_required;
}
memset(privptr->p_buff_ccw, 0x00,
privptr->p_buff_ccw_num * PAGE_SIZE);
/*
* obtain ending ccw block address
*
*/
privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
real_address = (__u32)__pa(privptr->p_end_ccw);
/* Initialize ending CCW block */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
dev->name,__func__);
#endif
p_endccw=privptr->p_end_ccw;
p_endccw->real=real_address;
p_endccw->write1=0x00;
p_endccw->read1=0x00;
/* write1_nop1 */
p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_endccw->write1_nop1.count = 1;
p_endccw->write1_nop1.cda = 0;
/* write1_nop2 */
p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
p_endccw->write1_nop2.count = 1;
p_endccw->write1_nop2.cda = 0;
/* write2_nop1 */
p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_endccw->write2_nop1.count = 1;
p_endccw->write2_nop1.cda = 0;
/* write2_nop2 */
p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
p_endccw->write2_nop2.count = 1;
p_endccw->write2_nop2.cda = 0;
/* read1_nop1 */
p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_endccw->read1_nop1.count = 1;
p_endccw->read1_nop1.cda = 0;
/* read1_nop2 */
p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
p_endccw->read1_nop2.count = 1;
p_endccw->read1_nop2.cda = 0;
/* read2_nop1 */
p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_endccw->read2_nop1.count = 1;
p_endccw->read2_nop1.cda = 0;
/* read2_nop2 */
p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
p_endccw->read2_nop2.count = 1;
p_endccw->read2_nop2.cda = 0;
#ifdef IOTRACE
printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
dev->name,__func__);
dumpit((char *)p_endccw, sizeof(struct endccw));
#endif
/*
* Build a chain of CCWs
*
*/
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() Begin build a chain of CCW buffer \n",
dev->name,__func__);
#endif
p_buff=privptr->p_buff_ccw;
p_free_chain=NULL;
for (i=0 ; i < ccw_pages_required; i++ ) {
real_address = (__u32)__pa(p_buff);
p_buf=p_buff;
for (j=0 ; j < ccw_blocks_perpage ; j++) {
p_buf->next = p_free_chain;
p_free_chain = p_buf;
p_buf->real=(__u32)__pa(p_buf);
++p_buf;
}
p_buff+=PAGE_SIZE;
}
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() "
"End build a chain of CCW buffer \n",
dev->name,__func__);
p_buf=p_free_chain;
while (p_buf!=NULL) {
dumpit((char *)p_buf, sizeof(struct ccwbk));
p_buf=p_buf->next;
}
#endif
/*
* Initialize ClawSignalBlock
*
*/
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() "
"Begin initialize ClawSignalBlock \n",
dev->name,__func__);
#endif
if (privptr->p_claw_signal_blk==NULL) {
privptr->p_claw_signal_blk=p_free_chain;
p_free_chain=p_free_chain->next;
pClawH=(struct clawh *)privptr->p_claw_signal_blk;
pClawH->length=0xffff;
pClawH->opcode=0xff;
pClawH->flag=CLAW_BUSY;
}
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() > End initialize "
"ClawSignalBlock\n",
dev->name,__func__);
dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
#endif
/*
* allocate write_pages_required and add to free chain
*/
if (privptr->p_buff_write==NULL) {
if (privptr->p_env->write_size < PAGE_SIZE) {
privptr->p_buff_write=
(void *)__get_free_pages(__GFP_DMA,
(int)pages_to_order_of_mag(claw_write_pages ));
if (privptr->p_buff_write==NULL) {
printk(KERN_INFO "%s: %s() __get_free_pages for write"
" bufs failed : get is for %d pages\n",
dev->name,__func__,claw_write_pages );
free_pages((unsigned long)privptr->p_buff_ccw,
(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
privptr->p_buff_ccw=NULL;
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > exit on line %d,"
"rc = ENOMEM\n",
dev->name,__func__,__LINE__);
#endif
return -ENOMEM;
}
/*
* Build CLAW write free chain
*
*/
memset(privptr->p_buff_write, 0x00,
ccw_pages_required * PAGE_SIZE);
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() Begin build claw write free "
"chain \n",dev->name,__func__);
#endif
privptr->p_write_free_chain=NULL;
p_buff=privptr->p_buff_write;
for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
p_buf = p_free_chain; /* get a CCW */
p_free_chain = p_buf->next;
p_buf->next =privptr->p_write_free_chain;
privptr->p_write_free_chain = p_buf;
p_buf-> p_buffer = (struct clawbuf *)p_buff;
p_buf-> write.cda = (__u32)__pa(p_buff);
p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> w_read_FF.count = 1;
p_buf-> w_read_FF.cda =
(__u32)__pa(&p_buf-> header.flag);
p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
p_buf-> w_TIC_1.flags = 0;
p_buf-> w_TIC_1.count = 0;
if (((unsigned long)p_buff+privptr->p_env->write_size) >=
((unsigned long)(p_buff+2*
(privptr->p_env->write_size) -1) & PAGE_MASK)) {
p_buff= p_buff+privptr->p_env->write_size;
}
}
}
else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
{
privptr->p_write_free_chain=NULL;
for (i = 0; i< privptr->p_env->write_buffers ; i++) {
p_buff=(void *)__get_free_pages(__GFP_DMA,
(int)pages_to_order_of_mag(
privptr->p_buff_pages_perwrite) );
#ifdef IOTRACE
printk(KERN_INFO "%s:%s __get_free_pages "
"for writes buf: get for %d pages\n",
dev->name,__func__,
privptr->p_buff_pages_perwrite);
#endif
if (p_buff==NULL) {
printk(KERN_INFO "%s:%s __get_free_pages "
"for writes buf failed : get is for %d pages\n",
dev->name,
__func__,
privptr->p_buff_pages_perwrite );
free_pages((unsigned long)privptr->p_buff_ccw,
(int)pages_to_order_of_mag(
privptr->p_buff_ccw_num));
privptr->p_buff_ccw=NULL;
p_buf=privptr->p_buff_write;
while (p_buf!=NULL) {
free_pages((unsigned long)
p_buf->p_buffer,
(int)pages_to_order_of_mag(
privptr->p_buff_pages_perwrite));
p_buf=p_buf->next;
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
dev->name,
__func__,
__LINE__);
#endif
return -ENOMEM;
} /* Error on get_pages */
memset(p_buff, 0x00, privptr->p_env->write_size );
p_buf = p_free_chain;
p_free_chain = p_buf->next;
p_buf->next = privptr->p_write_free_chain;
privptr->p_write_free_chain = p_buf;
privptr->p_buff_write = p_buf;
p_buf->p_buffer=(struct clawbuf *)p_buff;
p_buf-> write.cda = (__u32)__pa(p_buff);
p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> w_read_FF.count = 1;
p_buf-> w_read_FF.cda =
(__u32)__pa(&p_buf-> header.flag);
p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
p_buf-> w_TIC_1.flags = 0;
p_buf-> w_TIC_1.count = 0;
} /* for all write_buffers */
} /* else buffers are PAGE_SIZE or bigger */
}
privptr->p_buff_write_num=claw_write_pages;
privptr->write_free_count=privptr->p_env->write_buffers;
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s End build claw write free chain \n",
dev->name,__func__);
p_buf=privptr->p_write_free_chain;
while (p_buf!=NULL) {
dumpit((char *)p_buf, sizeof(struct ccwbk));
p_buf=p_buf->next;
}
#endif
/*
* allocate read_pages_required and chain to free chain
*/
if (privptr->p_buff_read==NULL) {
if (privptr->p_env->read_size < PAGE_SIZE) {
privptr->p_buff_read=
(void *)__get_free_pages(__GFP_DMA,
(int)pages_to_order_of_mag(claw_read_pages) );
if (privptr->p_buff_read==NULL) {
printk(KERN_INFO "%s: %s() "
"__get_free_pages for read buf failed : "
"get is for %d pages\n",
dev->name,__func__,claw_read_pages );
free_pages((unsigned long)privptr->p_buff_ccw,
(int)pages_to_order_of_mag(
privptr->p_buff_ccw_num));
/* free the write pages size is < page size */
free_pages((unsigned long)privptr->p_buff_write,
(int)pages_to_order_of_mag(
privptr->p_buff_write_num));
privptr->p_buff_ccw=NULL;
privptr->p_buff_write=NULL;
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
" ENOMEM\n",dev->name,__func__,__LINE__);
#endif
return -ENOMEM;
}
memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
privptr->p_buff_read_num=claw_read_pages;
/*
* Build CLAW read free chain
*
*/
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
dev->name,__func__);
#endif
p_buff=privptr->p_buff_read;
for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
p_buf = p_free_chain;
p_free_chain = p_buf->next;
if (p_last_CCWB==NULL) {
p_buf->next=NULL;
real_TIC_address=0;
p_last_CCWB=p_buf;
}
else {
p_buf->next=p_first_CCWB;
real_TIC_address=
(__u32)__pa(&p_first_CCWB -> read );
}
p_first_CCWB=p_buf;
p_buf->p_buffer=(struct clawbuf *)p_buff;
/* initialize read command */
p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
p_buf-> read.cda = (__u32)__pa(p_buff);
p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> read.count = privptr->p_env->read_size;
/* initialize read_h command */
p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
p_buf-> read_h.cda =
(__u32)__pa(&(p_buf->header));
p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> read_h.count = sizeof(struct clawh);
/* initialize Signal command */
p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
p_buf-> signal.cda =
(__u32)__pa(&(pClawH->flag));
p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> signal.count = 1;
/* initialize r_TIC_1 command */
p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
p_buf-> r_TIC_1.flags = 0;
p_buf-> r_TIC_1.count = 0;
/* initialize r_read_FF command */
p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
p_buf-> r_read_FF.cda =
(__u32)__pa(&(pClawH->flag));
p_buf-> r_read_FF.flags =
CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
p_buf-> r_read_FF.count = 1;
/* initialize r_TIC_2 */
memcpy(&p_buf->r_TIC_2,
&p_buf->r_TIC_1, sizeof(struct ccw1));
/* initialize Header */
p_buf->header.length=0xffff;
p_buf->header.opcode=0xff;
p_buf->header.flag=CLAW_PENDING;
if (((unsigned long)p_buff+privptr->p_env->read_size) >=
((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
& PAGE_MASK) ) {
p_buff= p_buff+privptr->p_env->read_size;
}
else {
p_buff=
(void *)((unsigned long)
(p_buff+2*(privptr->p_env->read_size) -1)
& PAGE_MASK) ;
}
} /* for read_buffers */
} /* read_size < PAGE_SIZE */
else { /* read Size >= PAGE_SIZE */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
dev->name,__func__);
#endif
for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
p_buff = (void *)__get_free_pages(__GFP_DMA,
(int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
if (p_buff==NULL) {
printk(KERN_INFO "%s: %s() __get_free_pages for read "
"buf failed : get is for %d pages\n",
dev->name,__func__,
privptr->p_buff_pages_perread );
free_pages((unsigned long)privptr->p_buff_ccw,
(int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
/* free the write pages */
p_buf=privptr->p_buff_write;
while (p_buf!=NULL) {
free_pages((unsigned long)p_buf->p_buffer,
(int)pages_to_order_of_mag(
privptr->p_buff_pages_perwrite ));
p_buf=p_buf->next;
}
/* free any read pages already alloc */
p_buf=privptr->p_buff_read;
while (p_buf!=NULL) {
free_pages((unsigned long)p_buf->p_buffer,
(int)pages_to_order_of_mag(
privptr->p_buff_pages_perread ));
p_buf=p_buf->next;
}
privptr->p_buff_ccw=NULL;
privptr->p_buff_write=NULL;
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
dev->name,__func__,
__LINE__);
#endif
return -ENOMEM;
}
memset(p_buff, 0x00, privptr->p_env->read_size);
p_buf = p_free_chain;
privptr->p_buff_read = p_buf;
p_free_chain = p_buf->next;
if (p_last_CCWB==NULL) {
p_buf->next=NULL;
real_TIC_address=0;
p_last_CCWB=p_buf;
}
else {
p_buf->next=p_first_CCWB;
real_TIC_address=
(addr_t)__pa(
&p_first_CCWB -> read );
}
p_first_CCWB=p_buf;
/* save buff address */
p_buf->p_buffer=(struct clawbuf *)p_buff;
/* initialize read command */
p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
p_buf-> read.cda = (__u32)__pa(p_buff);
p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> read.count = privptr->p_env->read_size;
/* initialize read_h command */
p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
p_buf-> read_h.cda =
(__u32)__pa(&(p_buf->header));
p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> read_h.count = sizeof(struct clawh);
/* initialize Signal command */
p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
p_buf-> signal.cda =
(__u32)__pa(&(pClawH->flag));
p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
p_buf-> signal.count = 1;
/* initialize r_TIC_1 command */
p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
p_buf-> r_TIC_1.flags = 0;
p_buf-> r_TIC_1.count = 0;
/* initialize r_read_FF command */
p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
p_buf-> r_read_FF.cda =
(__u32)__pa(&(pClawH->flag));
p_buf-> r_read_FF.flags =
CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
p_buf-> r_read_FF.count = 1;
/* initialize r_TIC_2 */
memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
sizeof(struct ccw1));
/* initialize Header */
p_buf->header.length=0xffff;
p_buf->header.opcode=0xff;
p_buf->header.flag=CLAW_PENDING;
} /* For read_buffers */
} /* read_size >= PAGE_SIZE */
} /* pBuffread = NULL */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() > End build claw read free chain \n",
dev->name,__func__);
p_buf=p_first_CCWB;
while (p_buf!=NULL) {
dumpit((char *)p_buf, sizeof(struct ccwbk));
p_buf=p_buf->next;
}
#endif
add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
privptr->buffs_alloc = 1;
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return 0;
} /* end of init_ccw_bk */
/*-------------------------------------------------------------------*
* *
* probe_error *
* *
*--------------------------------------------------------------------*/
static void
probe_error( struct ccwgroup_device *cgdev)
{
struct claw_privbk *privptr;
#ifdef FUNCTRACE
printk(KERN_INFO "%s enter \n",__func__);
#endif
CLAW_DBF_TEXT(4,trace,"proberr");
#ifdef DEBUGMSG
printk(KERN_INFO "%s variable cgdev =\n",__func__);
dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
#endif
privptr=(struct claw_privbk *)cgdev->dev.driver_data;
if (privptr!=NULL) {
kfree(privptr->p_env);
privptr->p_env=NULL;
kfree(privptr->p_mtc_envelope);
privptr->p_mtc_envelope=NULL;
kfree(privptr);
privptr=NULL;
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s > exit on line %d\n",
__func__,__LINE__);
#endif
return;
} /* probe_error */
/*-------------------------------------------------------------------*
* claw_process_control *
* *
* *
*--------------------------------------------------------------------*/
static int
claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
{
struct clawbuf *p_buf;
struct clawctl ctlbk;
struct clawctl *p_ctlbk;
char temp_host_name[8];
char temp_ws_name[8];
struct claw_privbk *privptr;
struct claw_env *p_env;
struct sysval *p_sysval;
struct conncmd *p_connect=NULL;
int rc;
struct chbk *p_ch = NULL;
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > enter \n",
dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"clw_cntl");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable dev =\n",dev->name);
dumpit((char *) dev, sizeof(struct net_device));
printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
dumpit((char *) p_ccw, sizeof(struct ccwbk *));
#endif
udelay(1000); /* Wait a ms for the control packets to
*catch up to each other */
privptr=dev->priv;
p_env=privptr->p_env;
memcpy( &temp_host_name, p_env->host_name, 8);
memcpy( &temp_ws_name, p_env->adapter_name , 8);
printk(KERN_INFO "%s: CLAW device %.8s: "
"Received Control Packet\n",
dev->name, temp_ws_name);
if (privptr->release_pend==1) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > "
"exit on line %d, rc=0\n",
dev->name,__func__,__LINE__);
#endif
return 0;
}
p_buf=p_ccw->p_buffer;
p_ctlbk=&ctlbk;
if (p_env->packing == DO_PACKED) { /* packing in progress?*/
memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
} else {
memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
}
#ifdef IOTRACE
printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
dumpit((char *)p_ctlbk, sizeof(struct clawctl));
#endif
switch (p_ctlbk->command)
{
case SYSTEM_VALIDATE_REQUEST:
if (p_ctlbk->version!=CLAW_VERSION_ID) {
claw_snd_sys_validate_rsp(dev, p_ctlbk,
CLAW_RC_WRONG_VERSION );
printk("%s: %d is wrong version id. "
"Expected %d\n",
dev->name, p_ctlbk->version,
CLAW_VERSION_ID);
}
p_sysval=(struct sysval *)&(p_ctlbk->data);
printk( "%s: Recv Sys Validate Request: "
"Vers=%d,link_id=%d,Corr=%d,WS name=%."
"8s,Host name=%.8s\n",
dev->name, p_ctlbk->version,
p_ctlbk->linkid,
p_ctlbk->correlator,
p_sysval->WS_name,
p_sysval->host_name);
if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
claw_snd_sys_validate_rsp(dev, p_ctlbk,
CLAW_RC_NAME_MISMATCH );
CLAW_DBF_TEXT(2,setup,"HSTBAD");
CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
printk(KERN_INFO "%s: Host name mismatch\n",
dev->name);
printk(KERN_INFO "%s: Received :%s: "
"expected :%s: \n",
dev->name,
p_sysval->host_name,
temp_host_name);
}
if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
claw_snd_sys_validate_rsp(dev, p_ctlbk,
CLAW_RC_NAME_MISMATCH );
CLAW_DBF_TEXT(2,setup,"WSNBAD");
CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
printk(KERN_INFO "%s: WS name mismatch\n",
dev->name);
printk(KERN_INFO "%s: Received :%s: "
"expected :%s: \n",
dev->name,
p_sysval->WS_name,
temp_ws_name);
}
if (( p_sysval->write_frame_size < p_env->write_size) &&
( p_env->packing == 0)) {
claw_snd_sys_validate_rsp(dev, p_ctlbk,
CLAW_RC_HOST_RCV_TOO_SMALL );
printk(KERN_INFO "%s: host write size is too "
"small\n", dev->name);
CLAW_DBF_TEXT(2,setup,"wrtszbad");
}
if (( p_sysval->read_frame_size < p_env->read_size) &&
( p_env->packing == 0)) {
claw_snd_sys_validate_rsp(dev, p_ctlbk,
CLAW_RC_HOST_RCV_TOO_SMALL );
printk(KERN_INFO "%s: host read size is too "
"small\n", dev->name);
CLAW_DBF_TEXT(2,setup,"rdsizbad");
}
claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
printk("%s: CLAW device %.8s: System validate"
" completed.\n",dev->name, temp_ws_name);
printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
p_sysval->read_frame_size,p_sysval->write_frame_size);
privptr->system_validate_comp=1;
if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
p_env->packing = PACKING_ASK;
}
claw_strt_conn_req(dev);
break;
case SYSTEM_VALIDATE_RESPONSE:
p_sysval=(struct sysval *)&(p_ctlbk->data);
printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
"WS name=%.8s,Host name=%.8s\n",
dev->name,
p_ctlbk->version,
p_ctlbk->correlator,
p_ctlbk->rc,
p_sysval->WS_name,
p_sysval->host_name);
switch (p_ctlbk->rc)
{
case 0:
printk(KERN_INFO "%s: CLAW device "
"%.8s: System validate "
"completed.\n",
dev->name, temp_ws_name);
if (privptr->system_validate_comp == 0)
claw_strt_conn_req(dev);
privptr->system_validate_comp=1;
break;
case CLAW_RC_NAME_MISMATCH:
printk(KERN_INFO "%s: Sys Validate "
"Resp : Host, WS name is "
"mismatch\n",
dev->name);
break;
case CLAW_RC_WRONG_VERSION:
printk(KERN_INFO "%s: Sys Validate "
"Resp : Wrong version\n",
dev->name);
break;
case CLAW_RC_HOST_RCV_TOO_SMALL:
printk(KERN_INFO "%s: Sys Validate "
"Resp : bad frame size\n",
dev->name);
break;
default:
printk(KERN_INFO "%s: Sys Validate "
"error code=%d \n",
dev->name, p_ctlbk->rc );
break;
}
break;
case CONNECTION_REQUEST:
p_connect=(struct conncmd *)&(p_ctlbk->data);
printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
"Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
dev->name,
p_ctlbk->version,
p_ctlbk->linkid,
p_ctlbk->correlator,
p_connect->host_name,
p_connect->WS_name);
if (privptr->active_link_ID!=0 ) {
claw_snd_disc(dev, p_ctlbk);
printk(KERN_INFO "%s: Conn Req error : "
"already logical link is active \n",
dev->name);
}
if (p_ctlbk->linkid!=1 ) {
claw_snd_disc(dev, p_ctlbk);
printk(KERN_INFO "%s: Conn Req error : "
"req logical link id is not 1\n",
dev->name);
}
rc=find_link(dev,
p_connect->host_name, p_connect->WS_name);
if (rc!=0) {
claw_snd_disc(dev, p_ctlbk);
printk(KERN_INFO "%s: Conn Req error : "
"req appl name does not match\n",
dev->name);
}
claw_send_control(dev,
CONNECTION_CONFIRM, p_ctlbk->linkid,
p_ctlbk->correlator,
0, p_connect->host_name,
p_connect->WS_name);
if (p_env->packing == PACKING_ASK) {
printk("%s: Now Pack ask\n",dev->name);
p_env->packing = PACK_SEND;
claw_snd_conn_req(dev,0);
}
printk(KERN_INFO "%s: CLAW device %.8s: Connection "
"completed link_id=%d.\n",
dev->name, temp_ws_name,
p_ctlbk->linkid);
privptr->active_link_ID=p_ctlbk->linkid;
p_ch=&privptr->channel[WRITE];
wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
break;
case CONNECTION_RESPONSE:
p_connect=(struct conncmd *)&(p_ctlbk->data);
printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
"Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
dev->name,
p_ctlbk->version,
p_ctlbk->linkid,
p_ctlbk->correlator,
p_ctlbk->rc,
p_connect->host_name,
p_connect->WS_name);
if (p_ctlbk->rc !=0 ) {
printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
dev->name, p_ctlbk->rc);
return 1;
}
rc=find_link(dev,
p_connect->host_name, p_connect->WS_name);
if (rc!=0) {
claw_snd_disc(dev, p_ctlbk);
printk(KERN_INFO "%s: Conn Resp error: "
"req appl name does not match\n",
dev->name);
}
/* should be until CONNECTION_CONFIRM */
privptr->active_link_ID = - (p_ctlbk->linkid);
break;
case CONNECTION_CONFIRM:
p_connect=(struct conncmd *)&(p_ctlbk->data);
printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
"Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
dev->name,
p_ctlbk->version,
p_ctlbk->linkid,
p_ctlbk->correlator,
p_connect->host_name,
p_connect->WS_name);
if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
privptr->active_link_ID=p_ctlbk->linkid;
if (p_env->packing > PACKING_ASK) {
printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
p_env->packing = DO_PACKED;
}
p_ch=&privptr->channel[WRITE];
wake_up(&p_ch->wait);
}
else {
printk(KERN_INFO "%s: Conn confirm: "
"unexpected linkid=%d \n",
dev->name, p_ctlbk->linkid);
claw_snd_disc(dev, p_ctlbk);
}
break;
case DISCONNECT:
printk(KERN_INFO "%s: Disconnect: "
"Vers=%d,link_id=%d,Corr=%d\n",
dev->name, p_ctlbk->version,
p_ctlbk->linkid, p_ctlbk->correlator);
if ((p_ctlbk->linkid == 2) &&
(p_env->packing == PACK_SEND)) {
privptr->active_link_ID = 1;
p_env->packing = DO_PACKED;
}
else
privptr->active_link_ID=0;
break;
case CLAW_ERROR:
printk(KERN_INFO "%s: CLAW ERROR detected\n",
dev->name);
break;
default:
printk(KERN_INFO "%s: Unexpected command code=%d \n",
dev->name, p_ctlbk->command);
break;
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
dev->name,__func__,__LINE__);
#endif
return 0;
} /* end of claw_process_control */
/*-------------------------------------------------------------------*
* claw_send_control *
* *
*--------------------------------------------------------------------*/
static int
claw_send_control(struct net_device *dev, __u8 type, __u8 link,
__u8 correlator, __u8 rc, char *local_name, char *remote_name)
{
struct claw_privbk *privptr;
struct clawctl *p_ctl;
struct sysval *p_sysval;
struct conncmd *p_connect;
struct sk_buff *skb;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s > enter \n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"sndcntl");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
printk(KERN_INFO "%s: variable type = 0x%X, link = "
"%d, correlator = %d, rc = %d\n",
dev->name,type, link, correlator, rc);
printk(KERN_INFO "%s: variable local_name = %s, "
"remote_name = %s\n",dev->name, local_name, remote_name);
#endif
privptr=dev->priv;
p_ctl=(struct clawctl *)&privptr->ctl_bk;
p_ctl->command=type;
p_ctl->version=CLAW_VERSION_ID;
p_ctl->linkid=link;
p_ctl->correlator=correlator;
p_ctl->rc=rc;
p_sysval=(struct sysval *)&p_ctl->data;
p_connect=(struct conncmd *)&p_ctl->data;
switch (p_ctl->command) {
case SYSTEM_VALIDATE_REQUEST:
case SYSTEM_VALIDATE_RESPONSE:
memcpy(&p_sysval->host_name, local_name, 8);
memcpy(&p_sysval->WS_name, remote_name, 8);
if (privptr->p_env->packing > 0) {
p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
} else {
/* how big is the piggest group of packets */
p_sysval->read_frame_size=privptr->p_env->read_size;
p_sysval->write_frame_size=privptr->p_env->write_size;
}
memset(&p_sysval->reserved, 0x00, 4);
break;
case CONNECTION_REQUEST:
case CONNECTION_RESPONSE:
case CONNECTION_CONFIRM:
case DISCONNECT:
memcpy(&p_sysval->host_name, local_name, 8);
memcpy(&p_sysval->WS_name, remote_name, 8);
if (privptr->p_env->packing > 0) {
/* How big is the biggest packet */
p_connect->reserved1[0]=CLAW_FRAME_SIZE;
p_connect->reserved1[1]=CLAW_FRAME_SIZE;
} else {
memset(&p_connect->reserved1, 0x00, 4);
memset(&p_connect->reserved2, 0x00, 4);
}
break;
default:
break;
}
/* write Control Record to the device */
skb = dev_alloc_skb(sizeof(struct clawctl));
if (!skb) {
printk( "%s:%s low on mem, returning...\n",
dev->name,__func__);
#ifdef DEBUG
printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
dev->name,__func__);
#endif
return -ENOMEM;
}
memcpy(skb_put(skb, sizeof(struct clawctl)),
p_ctl, sizeof(struct clawctl));
#ifdef IOTRACE
printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
dumpit((char *)p_ctl,sizeof(struct clawctl));
#endif
if (privptr->p_env->packing >= PACK_SEND)
claw_hw_tx(skb, dev, 1);
else
claw_hw_tx(skb, dev, 0);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return 0;
} /* end of claw_send_control */
/*-------------------------------------------------------------------*
* claw_snd_conn_req *
* *
*--------------------------------------------------------------------*/
static int
claw_snd_conn_req(struct net_device *dev, __u8 link)
{
int rc;
struct claw_privbk *privptr=dev->priv;
struct clawctl *p_ctl;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter \n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"snd_conn");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
dumpit((char *) dev, sizeof(struct net_device));
#endif
rc = 1;
p_ctl=(struct clawctl *)&privptr->ctl_bk;
p_ctl->linkid = link;
if ( privptr->system_validate_comp==0x00 ) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
dev->name,__func__,__LINE__);
#endif
return rc;
}
if (privptr->p_env->packing == PACKING_ASK )
rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
if (privptr->p_env->packing == PACK_SEND) {
rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
}
if (privptr->p_env->packing == 0)
rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
HOST_APPL_NAME, privptr->p_env->api_type);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
dev->name,__func__,__LINE__, rc);
#endif
return rc;
} /* end of claw_snd_conn_req */
/*-------------------------------------------------------------------*
* claw_snd_disc *
* *
*--------------------------------------------------------------------*/
static int
claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
{
int rc;
struct conncmd * p_connect;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"snd_dsc");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable dev =\n",dev->name);
dumpit((char *) dev, sizeof(struct net_device));
printk(KERN_INFO "%s: variable p_ctl",dev->name);
dumpit((char *) p_ctl, sizeof(struct clawctl));
#endif
p_connect=(struct conncmd *)&p_ctl->data;
rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
p_ctl->correlator, 0,
p_connect->host_name, p_connect->WS_name);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
dev->name,__func__, __LINE__, rc);
#endif
return rc;
} /* end of claw_snd_disc */
/*-------------------------------------------------------------------*
* claw_snd_sys_validate_rsp *
* *
*--------------------------------------------------------------------*/
static int
claw_snd_sys_validate_rsp(struct net_device *dev,
struct clawctl *p_ctl, __u32 return_code)
{
struct claw_env * p_env;
struct claw_privbk *privptr;
int rc;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",
dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"chkresp");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
dev->name, return_code);
dumpit((char *) dev, sizeof(struct net_device));
printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
dumpit((char *) p_ctl, sizeof(struct clawctl));
#endif
privptr = dev->priv;
p_env=privptr->p_env;
rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
p_ctl->linkid,
p_ctl->correlator,
return_code,
p_env->host_name,
p_env->adapter_name );
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
dev->name,__func__,__LINE__, rc);
#endif
return rc;
} /* end of claw_snd_sys_validate_rsp */
/*-------------------------------------------------------------------*
* claw_strt_conn_req *
* *
*--------------------------------------------------------------------*/
static int
claw_strt_conn_req(struct net_device *dev )
{
int rc;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"conn_req");
#ifdef DEBUGMSG
printk(KERN_INFO "%s: variable dev =\n",dev->name);
dumpit((char *) dev, sizeof(struct net_device));
#endif
rc=claw_snd_conn_req(dev, 1);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
dev->name,__func__,__LINE__, rc);
#endif
return rc;
} /* end of claw_strt_conn_req */
/*-------------------------------------------------------------------*
* claw_stats *
*-------------------------------------------------------------------*/
static struct
net_device_stats *claw_stats(struct net_device *dev)
{
struct claw_privbk *privptr;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"stats");
privptr = dev->priv;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return &privptr->stats;
} /* end of claw_stats */
/*-------------------------------------------------------------------*
* unpack_read *
* *
*--------------------------------------------------------------------*/
static void
unpack_read(struct net_device *dev )
{
struct sk_buff *skb;
struct claw_privbk *privptr;
struct claw_env *p_env;
struct ccwbk *p_this_ccw;
struct ccwbk *p_first_ccw;
struct ccwbk *p_last_ccw;
struct clawph *p_packh;
void *p_packd;
struct clawctl *p_ctlrec=NULL;
__u32 len_of_data;
__u32 pack_off;
__u8 link_num;
__u8 mtc_this_frm=0;
__u32 bytes_to_mov;
struct chbk *p_ch = NULL;
int i=0;
int p=0;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s enter \n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"unpkread");
p_first_ccw=NULL;
p_last_ccw=NULL;
p_packh=NULL;
p_packd=NULL;
privptr=dev->priv;
p_env = privptr->p_env;
p_this_ccw=privptr->p_read_active_first;
i=0;
while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
#ifdef IOTRACE
printk(KERN_INFO "%s p_this_ccw \n",dev->name);
dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
" pk=%d \n",dev->name,p_env->packing);
dumpit((char *)p_this_ccw->p_buffer, 64 );
#endif
pack_off = 0;
p = 0;
p_this_ccw->header.flag=CLAW_PENDING;
privptr->p_read_active_first=p_this_ccw->next;
p_this_ccw->next=NULL;
p_packh = (struct clawph *)p_this_ccw->p_buffer;
if ((p_env->packing == PACK_SEND) &&
(p_packh->len == 32) &&
(p_packh->link_num == 0)) { /* is it a packed ctl rec? */
p_packh++; /* peek past pack header */
p_ctlrec = (struct clawctl *)p_packh;
p_packh--; /* un peek */
if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
(p_ctlrec->command == CONNECTION_CONFIRM))
p_env->packing = DO_PACKED;
}
if (p_env->packing == DO_PACKED)
link_num=p_packh->link_num;
else
link_num=p_this_ccw->header.opcode / 8;
if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s > More_to_come is ON\n",
dev->name,__func__);
#endif
mtc_this_frm=1;
if (p_this_ccw->header.length!=
privptr->p_env->read_size ) {
printk(KERN_INFO " %s: Invalid frame detected "
"length is %02x\n" ,
dev->name, p_this_ccw->header.length);
}
}
if (privptr->mtc_skipping) {
/*
* We're in the mode of skipping past a
* multi-frame message
* that we can't process for some reason or other.
* The first frame without the More-To-Come flag is
* the last frame of the skipped message.
*/
/* in case of More-To-Come not set in this frame */
if (mtc_this_frm==0) {
privptr->mtc_skipping=0; /* Ok, the end */
privptr->mtc_logical_link=-1;
}
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s goto next "
"frame from MoretoComeSkip \n",
dev->name,__func__);
#endif
goto NextFrame;
}
if (link_num==0) {
claw_process_control(dev, p_this_ccw);
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s goto next "
"frame from claw_process_control \n",
dev->name,__func__);
#endif
CLAW_DBF_TEXT(4,trace,"UnpkCntl");
goto NextFrame;
}
unpack_next:
if (p_env->packing == DO_PACKED) {
if (pack_off > p_env->read_size)
goto NextFrame;
p_packd = p_this_ccw->p_buffer+pack_off;
p_packh = (struct clawph *) p_packd;
if ((p_packh->len == 0) || /* all done with this frame? */
(p_packh->flag != 0))
goto NextFrame;
bytes_to_mov = p_packh->len;
pack_off += bytes_to_mov+sizeof(struct clawph);
p++;
} else {
bytes_to_mov=p_this_ccw->header.length;
}
if (privptr->mtc_logical_link<0) {
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s mtc_logical_link < 0 \n",
dev->name,__func__);
#endif
/*
* if More-To-Come is set in this frame then we don't know
* length of entire message, and hence have to allocate
* large buffer */
/* We are starting a new envelope */
privptr->mtc_offset=0;
privptr->mtc_logical_link=link_num;
}
if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
/* error */
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s > goto next "
"frame from MoretoComeSkip \n",
dev->name,
__func__);
printk(KERN_INFO " bytes_to_mov %d > (MAX_ENVELOPE_"
"SIZE-privptr->mtc_offset %d)\n",
bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
#endif
privptr->stats.rx_frame_errors++;
goto NextFrame;
}
if (p_env->packing == DO_PACKED) {
memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
p_packd+sizeof(struct clawph), bytes_to_mov);
} else {
memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
p_this_ccw->p_buffer, bytes_to_mov);
}
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() received data \n",
dev->name,__func__);
if (p_env->packing == DO_PACKED)
dumpit((char *)p_packd+sizeof(struct clawph),32);
else
dumpit((char *)p_this_ccw->p_buffer, 32);
printk(KERN_INFO "%s: %s() bytelength %d \n",
dev->name,__func__,bytes_to_mov);
#endif
if (mtc_this_frm==0) {
len_of_data=privptr->mtc_offset+bytes_to_mov;
skb=dev_alloc_skb(len_of_data);
if (skb) {
memcpy(skb_put(skb,len_of_data),
privptr->p_mtc_envelope,
len_of_data);
skb->dev=dev;
skb_reset_mac_header(skb);
skb->protocol=htons(ETH_P_IP);
skb->ip_summed=CHECKSUM_UNNECESSARY;
privptr->stats.rx_packets++;
privptr->stats.rx_bytes+=len_of_data;
netif_rx(skb);
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() netif_"
"rx(skb) completed \n",
dev->name,__func__);
#endif
}
else {
privptr->stats.rx_dropped++;
printk(KERN_WARNING "%s: %s() low on memory\n",
dev->name,__func__);
}
privptr->mtc_offset=0;
privptr->mtc_logical_link=-1;
}
else {
privptr->mtc_offset+=bytes_to_mov;
}
if (p_env->packing == DO_PACKED)
goto unpack_next;
NextFrame:
/*
* Remove ThisCCWblock from active read queue, and add it
* to queue of free blocks to be reused.
*/
i++;
p_this_ccw->header.length=0xffff;
p_this_ccw->header.opcode=0xff;
/*
* add this one to the free queue for later reuse
*/
if (p_first_ccw==NULL) {
p_first_ccw = p_this_ccw;
}
else {
p_last_ccw->next = p_this_ccw;
}
p_last_ccw = p_this_ccw;
/*
* chain to next block on active read queue
*/
p_this_ccw = privptr->p_read_active_first;
CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
} /* end of while */
/* check validity */
#ifdef IOTRACE
printk(KERN_INFO "%s:%s processed frame is %d \n",
dev->name,__func__,i);
printk(KERN_INFO "%s:%s F:%lx L:%lx\n",
dev->name,
__func__,
(unsigned long)p_first_ccw,
(unsigned long)p_last_ccw);
#endif
CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
add_claw_reads(dev, p_first_ccw, p_last_ccw);
p_ch=&privptr->channel[READ];
claw_strt_read(dev, LOCK_YES);
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s exit on line %d\n",
dev->name, __func__, __LINE__);
#endif
return;
} /* end of unpack_read */
/*-------------------------------------------------------------------*
* claw_strt_read *
* *
*--------------------------------------------------------------------*/
static void
claw_strt_read (struct net_device *dev, int lock )
{
int rc = 0;
__u32 parm;
unsigned long saveflags = 0;
struct claw_privbk *privptr=dev->priv;
struct ccwbk*p_ccwbk;
struct chbk *p_ch;
struct clawh *p_clawh;
p_ch=&privptr->channel[READ];
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter \n",dev->name,__func__);
printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
dumpit((char *) dev, sizeof(struct net_device));
#endif
CLAW_DBF_TEXT(4,trace,"StRdNter");
p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
p_clawh->flag=CLAW_IDLE; /* 0x00 */
if ((privptr->p_write_active_first!=NULL &&
privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
(privptr->p_read_active_first!=NULL &&
privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
p_clawh->flag=CLAW_BUSY; /* 0xff */
}
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s state-%02x\n" ,
dev->name,__func__, p_ch->claw_state);
#endif
if (lock==LOCK_YES) {
spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
}
if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
#ifdef DEBUGMSG
printk(KERN_INFO "%s: HOT READ started in %s\n" ,
dev->name,__func__);
p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
dumpit((char *)&p_clawh->flag , 1);
#endif
CLAW_DBF_TEXT(4,trace,"HotRead");
p_ccwbk=privptr->p_read_active_first;
parm = (unsigned long) p_ch;
rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
0xff, 0);
if (rc != 0) {
ccw_check_return_code(p_ch->cdev, rc);
}
}
else {
#ifdef DEBUGMSG
printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,trace,"ReadAct");
}
if (lock==LOCK_YES) {
spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"StRdExit");
return;
} /* end of claw_strt_read */
/*-------------------------------------------------------------------*
* claw_strt_out_IO *
* *
*--------------------------------------------------------------------*/
static void
claw_strt_out_IO( struct net_device *dev )
{
int rc = 0;
unsigned long parm;
struct claw_privbk *privptr;
struct chbk *p_ch;
struct ccwbk *p_first_ccw;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",dev->name,__func__);
#endif
if (!dev) {
return;
}
privptr=(struct claw_privbk *)dev->priv;
p_ch=&privptr->channel[WRITE];
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s state-%02x\n" ,
dev->name,__func__,p_ch->claw_state);
#endif
CLAW_DBF_TEXT(4,trace,"strt_io");
p_first_ccw=privptr->p_write_active_first;
if (p_ch->claw_state == CLAW_STOP)
return;
if (p_first_ccw == NULL) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return;
}
if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
parm = (unsigned long) p_ch;
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__func__);
dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
#endif
CLAW_DBF_TEXT(2,trace,"StWrtIO");
rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
0xff, 0);
if (rc != 0) {
ccw_check_return_code(p_ch->cdev, rc);
}
}
dev->trans_start = jiffies;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__func__,__LINE__);
#endif
return;
} /* end of claw_strt_out_IO */
/*-------------------------------------------------------------------*
* Free write buffers *
* *
*--------------------------------------------------------------------*/
static void
claw_free_wrt_buf( struct net_device *dev )
{
struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
struct ccwbk*p_first_ccw;
struct ccwbk*p_last_ccw;
struct ccwbk*p_this_ccw;
struct ccwbk*p_next_ccw;
#ifdef IOTRACE
struct ccwbk*p_buf;
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",dev->name,__func__);
printk(KERN_INFO "%s: free count = %d variable dev =\n",
dev->name,privptr->write_free_count);
#endif
CLAW_DBF_TEXT(4,trace,"freewrtb");
/* scan the write queue to free any completed write packets */
p_first_ccw=NULL;
p_last_ccw=NULL;
#ifdef IOTRACE
printk(KERN_INFO "%s: Dump current CCW chain \n",dev->name );
p_buf=privptr->p_write_active_first;
while (p_buf!=NULL) {
dumpit((char *)p_buf, sizeof(struct ccwbk));
p_buf=p_buf->next;
}
if (p_buf==NULL) {
printk(KERN_INFO "%s: privptr->p_write_"
"active_first==NULL\n",dev->name );
}
p_buf=(struct ccwbk*)privptr->p_end_ccw;
dumpit((char *)p_buf, sizeof(struct endccw));
#endif
p_this_ccw=privptr->p_write_active_first;
while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
{
p_next_ccw = p_this_ccw->next;
if (((p_next_ccw!=NULL) &&
(p_next_ccw->header.flag!=CLAW_PENDING)) ||
((p_this_ccw == privptr->p_write_active_last) &&
(p_this_ccw->header.flag!=CLAW_PENDING))) {
/* The next CCW is OK or this is */
/* the last CCW...free it @A1A */
privptr->p_write_active_first=p_this_ccw->next;
p_this_ccw->header.flag=CLAW_PENDING;
p_this_ccw->next=privptr->p_write_free_chain;
privptr->p_write_free_chain=p_this_ccw;
++privptr->write_free_count;
privptr->stats.tx_bytes+= p_this_ccw->write.count;
p_this_ccw=privptr->p_write_active_first;
privptr->stats.tx_packets++;
}
else {
break;
}
}
if (privptr->write_free_count!=0) {
claw_clearbit_busy(TB_NOBUFFER,dev);
}
/* whole chain removed? */
if (privptr->p_write_active_first==NULL) {
privptr->p_write_active_last=NULL;
#ifdef DEBUGMSG
printk(KERN_INFO "%s:%s p_write_"
"active_first==NULL\n",dev->name,__func__);
#endif
}
#ifdef IOTRACE
printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name );
p_buf=privptr->p_write_active_first;
while (p_buf!=NULL) {
dumpit((char *)p_buf, sizeof(struct ccwbk));
p_buf=p_buf->next;
}
if (p_buf==NULL) {
printk(KERN_INFO "%s: privptr->p_write_active_"
"first==NULL\n",dev->name );
}
p_buf=(struct ccwbk*)privptr->p_end_ccw;
dumpit((char *)p_buf, sizeof(struct endccw));
#endif
CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
dev->name,__func__, __LINE__,privptr->write_free_count);
#endif
return;
}
/*-------------------------------------------------------------------*
* claw free netdevice *
* *
*--------------------------------------------------------------------*/
static void
claw_free_netdevice(struct net_device * dev, int free_dev)
{
struct claw_privbk *privptr;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"free_dev");
if (!dev)
return;
CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
privptr = dev->priv;
if (dev->flags & IFF_RUNNING)
claw_release(dev);
if (privptr) {
privptr->channel[READ].ndev = NULL; /* say it's free */
}
dev->priv=NULL;
#ifdef MODULE
if (free_dev) {
free_netdev(dev);
}
#endif
CLAW_DBF_TEXT(2,setup,"feee_ok");
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit\n",dev->name,__func__);
#endif
}
/**
* Claw init netdevice
* Initialize everything of the net device except the name and the
* channel structs.
*/
static void
claw_init_netdevice(struct net_device * dev)
{
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"init_dev");
CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
if (!dev) {
printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
__func__,__LINE__);
CLAW_DBF_TEXT(2,setup,"baddev");
return;
}
dev->mtu = CLAW_DEFAULT_MTU_SIZE;
dev->hard_start_xmit = claw_tx;
dev->open = claw_open;
dev->stop = claw_release;
dev->get_stats = claw_stats;
dev->change_mtu = claw_change_mtu;
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->type = ARPHRD_SLIP;
dev->tx_queue_len = 1300;
dev->flags = IFF_POINTOPOINT | IFF_NOARP;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit\n",dev->name,__func__);
#endif
CLAW_DBF_TEXT(2,setup,"initok");
return;
}
/**
* Init a new channel in the privptr->channel[i].
*
* @param cdev The ccw_device to be added.
*
* @return 0 on success, !0 on error.
*/
static int
add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
{
struct chbk *p_ch;
struct ccw_dev_id dev_id;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__func__);
#endif
CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
p_ch = &privptr->channel[i];
p_ch->cdev = cdev;
snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
ccw_device_get_id(cdev, &dev_id);
p_ch->devno = dev_id.devno;
if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
printk(KERN_WARNING "%s Out of memory in %s for irb\n",
p_ch->id,__func__);
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
p_ch->id,__func__,__LINE__);
#endif
return -ENOMEM;
}
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
cdev->dev.bus_id,__func__,__LINE__);
#endif
return 0;
}
/**
*
* Setup an interface.
*
* @param cgdev Device to be setup.
*
* @returns 0 on success, !0 on failure.
*/
static int
claw_new_device(struct ccwgroup_device *cgdev)
{
struct claw_privbk *privptr;
struct claw_env *p_env;
struct net_device *dev;
int ret;
struct ccw_dev_id dev_id;
pr_debug("%s() called\n", __func__);
printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
CLAW_DBF_TEXT(2,setup,"new_dev");
privptr = cgdev->dev.driver_data;
cgdev->cdev[READ]->dev.driver_data = privptr;
cgdev->cdev[WRITE]->dev.driver_data = privptr;
if (!privptr)
return -ENODEV;
p_env = privptr->p_env;
ccw_device_get_id(cgdev->cdev[READ], &dev_id);
p_env->devno[READ] = dev_id.devno;
ccw_device_get_id(cgdev->cdev[WRITE], &dev_id);
p_env->devno[WRITE] = dev_id.devno;
ret = add_channel(cgdev->cdev[0],0,privptr);
if (ret == 0)
ret = add_channel(cgdev->cdev[1],1,privptr);
if (ret != 0) {
printk(KERN_WARNING
"add channel failed "
"with ret = %d\n", ret);
goto out;
}
ret = ccw_device_set_online(cgdev->cdev[READ]);
if (ret != 0) {
printk(KERN_WARNING
"claw: ccw_device_set_online %s READ failed "
"with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
goto out;
}
ret = ccw_device_set_online(cgdev->cdev[WRITE]);
if (ret != 0) {
printk(KERN_WARNING
"claw: ccw_device_set_online %s WRITE failed "
"with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
goto out;
}
dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
if (!dev) {
printk(KERN_WARNING "%s:alloc_netdev failed\n",__func__);
goto out;
}
dev->priv = privptr;
cgdev->dev.driver_data = privptr;
cgdev->cdev[READ]->dev.driver_data = privptr;
cgdev->cdev[WRITE]->dev.driver_data = privptr;
/* sysfs magic */
SET_NETDEV_DEV(dev, &cgdev->dev);
if (register_netdev(dev) != 0) {
claw_free_netdevice(dev, 1);
CLAW_DBF_TEXT(2,trace,"regfail");
goto out;
}
dev->flags &=~IFF_RUNNING;
if (privptr->buffs_alloc == 0) {
ret=init_ccw_bk(dev);
if (ret !=0) {
printk(KERN_WARNING
"claw: init_ccw_bk failed with ret=%d\n", ret);
unregister_netdev(dev);
claw_free_netdevice(dev,1);
CLAW_DBF_TEXT(2,trace,"ccwmem");
goto out;
}
}
privptr->channel[READ].ndev = dev;
privptr->channel[WRITE].ndev = dev;
privptr->p_env->ndev = dev;
printk(KERN_INFO "%s:readsize=%d writesize=%d "
"readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
dev->name, p_env->read_size,
p_env->write_size, p_env->read_buffers,
p_env->write_buffers, p_env->devno[READ],
p_env->devno[WRITE]);
printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
":%.8s api_type: %.8s\n",
dev->name, p_env->host_name,
p_env->adapter_name , p_env->api_type);
return 0;
out:
ccw_device_set_offline(cgdev->cdev[1]);
ccw_device_set_offline(cgdev->cdev[0]);
return -ENODEV;
}
static void
claw_purge_skb_queue(struct sk_buff_head *q)
{
struct sk_buff *skb;
CLAW_DBF_TEXT(4,trace,"purgque");
while ((skb = skb_dequeue(q))) {
atomic_dec(&skb->users);
dev_kfree_skb_any(skb);
}
}
/**
* Shutdown an interface.
*
* @param cgdev Device to be shut down.
*
* @returns 0 on success, !0 on failure.
*/
static int
claw_shutdown_device(struct ccwgroup_device *cgdev)
{
struct claw_privbk *priv;
struct net_device *ndev;
int ret;
pr_debug("%s() called\n", __func__);
CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
priv = cgdev->dev.driver_data;
if (!priv)
return -ENODEV;
ndev = priv->channel[READ].ndev;
if (ndev) {
/* Close the device */
printk(KERN_INFO
"%s: shuting down \n",ndev->name);
if (ndev->flags & IFF_RUNNING)
ret = claw_release(ndev);
ndev->flags &=~IFF_RUNNING;
unregister_netdev(ndev);
ndev->priv = NULL; /* cgdev data, not ndev's to free */
claw_free_netdevice(ndev, 1);
priv->channel[READ].ndev = NULL;
priv->channel[WRITE].ndev = NULL;
priv->p_env->ndev = NULL;
}
ccw_device_set_offline(cgdev->cdev[1]);
ccw_device_set_offline(cgdev->cdev[0]);
return 0;
}
static void
claw_remove_device(struct ccwgroup_device *cgdev)
{
struct claw_privbk *priv;
pr_debug("%s() called\n", __func__);
CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
priv = cgdev->dev.driver_data;
if (!priv) {
printk(KERN_WARNING "claw: %s() no Priv exiting\n",__func__);
return;
}
printk(KERN_INFO "claw: %s() called %s will be removed.\n",
__func__,cgdev->cdev[0]->dev.bus_id);
if (cgdev->state == CCWGROUP_ONLINE)
claw_shutdown_device(cgdev);
claw_remove_files(&cgdev->dev);
kfree(priv->p_mtc_envelope);
priv->p_mtc_envelope=NULL;
kfree(priv->p_env);
priv->p_env=NULL;
kfree(priv->channel[0].irb);
priv->channel[0].irb=NULL;
kfree(priv->channel[1].irb);
priv->channel[1].irb=NULL;
kfree(priv);
cgdev->dev.driver_data=NULL;
cgdev->cdev[READ]->dev.driver_data = NULL;
cgdev->cdev[WRITE]->dev.driver_data = NULL;
put_device(&cgdev->dev);
}
/*
* sysfs attributes
*/
static ssize_t
claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct claw_privbk *priv;
struct claw_env * p_env;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
return sprintf(buf, "%s\n",p_env->host_name);
}
static ssize_t
claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct claw_privbk *priv;
struct claw_env * p_env;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
if (count > MAX_NAME_LEN+1)
return -EINVAL;
memset(p_env->host_name, 0x20, MAX_NAME_LEN);
strncpy(p_env->host_name,buf, count);
p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
p_env->host_name[MAX_NAME_LEN] = 0x00;
CLAW_DBF_TEXT(2,setup,"HstnSet");
CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
return count;
}
static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
static ssize_t
claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct claw_privbk *priv;
struct claw_env * p_env;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
return sprintf(buf, "%s\n",p_env->adapter_name);
}
static ssize_t
claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct claw_privbk *priv;
struct claw_env * p_env;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
if (count > MAX_NAME_LEN+1)
return -EINVAL;
memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
strncpy(p_env->adapter_name,buf, count);
p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
p_env->adapter_name[MAX_NAME_LEN] = 0x00;
CLAW_DBF_TEXT(2,setup,"AdnSet");
CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
return count;
}
static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
static ssize_t
claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct claw_privbk *priv;
struct claw_env * p_env;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
return sprintf(buf, "%s\n",
p_env->api_type);
}
static ssize_t
claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct claw_privbk *priv;
struct claw_env * p_env;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
if (count > MAX_NAME_LEN+1)
return -EINVAL;
memset(p_env->api_type, 0x20, MAX_NAME_LEN);
strncpy(p_env->api_type,buf, count);
p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
p_env->api_type[MAX_NAME_LEN] = 0x00;
if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
p_env->read_size=DEF_PACK_BUFSIZE;
p_env->write_size=DEF_PACK_BUFSIZE;
p_env->packing=PACKING_ASK;
CLAW_DBF_TEXT(2,setup,"PACKING");
}
else {
p_env->packing=0;
p_env->read_size=CLAW_FRAME_SIZE;
p_env->write_size=CLAW_FRAME_SIZE;
CLAW_DBF_TEXT(2,setup,"ApiSet");
}
CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
return count;
}
static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
static ssize_t
claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct claw_privbk *priv;
struct claw_env * p_env;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
return sprintf(buf, "%d\n", p_env->write_buffers);
}
static ssize_t
claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct claw_privbk *priv;
struct claw_env * p_env;
int nnn,max;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
sscanf(buf, "%i", &nnn);
if (p_env->packing) {
max = 64;
}
else {
max = 512;
}
if ((nnn > max ) || (nnn < 2))
return -EINVAL;
p_env->write_buffers = nnn;
CLAW_DBF_TEXT(2,setup,"Wbufset");
CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
return count;
}
static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
static ssize_t
claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct claw_privbk *priv;
struct claw_env * p_env;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
return sprintf(buf, "%d\n", p_env->read_buffers);
}
static ssize_t
claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct claw_privbk *priv;
struct claw_env *p_env;
int nnn,max;
priv = dev->driver_data;
if (!priv)
return -ENODEV;
p_env = priv->p_env;
sscanf(buf, "%i", &nnn);
if (p_env->packing) {
max = 64;
}
else {
max = 512;
}
if ((nnn > max ) || (nnn < 2))
return -EINVAL;
p_env->read_buffers = nnn;
CLAW_DBF_TEXT(2,setup,"Rbufset");
CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
return count;
}
static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
static struct attribute *claw_attr[] = {
&dev_attr_read_buffer.attr,
&dev_attr_write_buffer.attr,
&dev_attr_adapter_name.attr,
&dev_attr_api_type.attr,
&dev_attr_host_name.attr,
NULL,
};
static struct attribute_group claw_attr_group = {
.attrs = claw_attr,
};
static int
claw_add_files(struct device *dev)
{
pr_debug("%s() called\n", __func__);
CLAW_DBF_TEXT(2,setup,"add_file");
return sysfs_create_group(&dev->kobj, &claw_attr_group);
}
static void
claw_remove_files(struct device *dev)
{
pr_debug("%s() called\n", __func__);
CLAW_DBF_TEXT(2,setup,"rem_file");
sysfs_remove_group(&dev->kobj, &claw_attr_group);
}
/*--------------------------------------------------------------------*
* claw_init and cleanup *
*---------------------------------------------------------------------*/
static void __exit
claw_cleanup(void)
{
unregister_cu3088_discipline(&claw_group_driver);
claw_unregister_debug_facility();
printk(KERN_INFO "claw: Driver unloaded\n");
}
/**
* Initialize module.
* This is called just after the module is loaded.
*
* @return 0 on success, !0 on error.
*/
static int __init
claw_init(void)
{
int ret = 0;
printk(KERN_INFO "claw: starting driver\n");
#ifdef FUNCTRACE
printk(KERN_INFO "claw: %s() enter \n",__func__);
#endif
ret = claw_register_debug_facility();
if (ret) {
printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
__func__,ret);
return ret;
}
CLAW_DBF_TEXT(2,setup,"init_mod");
ret = register_cu3088_discipline(&claw_group_driver);
if (ret) {
claw_unregister_debug_facility();
printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
__func__,ret);
}
#ifdef FUNCTRACE
printk(KERN_INFO "claw: %s() exit \n",__func__);
#endif
return ret;
}
module_init(claw_init);
module_exit(claw_cleanup);
/*--------------------------------------------------------------------*
* End of File *
*---------------------------------------------------------------------*/
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