blob: 23d53bf9daf1f236aa489bab73570a2d3398cdb6 [file] [log] [blame]
/*
* 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/bitops.h>
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include <asm/debug.h>
#include <asm/idals.h>
#include <asm/io.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
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 inline ccw_check_return_code (struct ccw_device *cdev,
int return_code);
static void inline 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 inline 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",__FUNCTION__);
#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,__FUNCTION__,__LINE__);
CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
return -ENOMEM;
}
privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
privptr->p_env = kmalloc(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,__FUNCTION__,__LINE__);
CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
return -ENOMEM;
}
memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
memset(privptr->p_env, 0x00, sizeof(struct claw_env));
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,__FUNCTION__,__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",__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__, __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, __FUNCTION__, __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,
__FUNCTION__,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,__FUNCTION__);
#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,
__FUNCTION__, __LINE__);
#endif
return -EINVAL;
}
dev->mtu = new_mtu;
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
__FUNCTION__, __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,__FUNCTION__);
#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,
__FUNCTION__, __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,__FUNCTION__,__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,__FUNCTION__,__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",__FUNCTION__);
#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.cstat, irb->scsw.dstat);
#ifdef FUNCTRACE
printk(KERN_INFO "claw: %s() "
"exit on line %d\n",__FUNCTION__,__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.cstat,
irb->scsw.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.cstat && !(irb->scsw.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.cstat, irb->scsw.dstat,irb->scsw.cpa);
#ifdef IOTRACE
dumpit((char *)irb,sizeof(struct irb));
dumpit((char *)(unsigned long)irb->scsw.cpa,
sizeof(struct ccw1));
#endif
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__FUNCTION__,__LINE__);
#endif
CLAW_DBF_TEXT(2,trace,"chanchk");
/* return; */
}
/* Check the reason-code of a unit check */
if (irb->scsw.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.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.stctl & SCSW_STCTL_SEC_STATUS) ||
(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
(p_ch->irb->scsw.stctl ==
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__FUNCTION__,__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,__FUNCTION__,__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.stctl & SCSW_STCTL_SEC_STATUS) ||
(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
(p_ch->irb->scsw.stctl ==
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__FUNCTION__,__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.cstat,
irb->scsw.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,__FUNCTION__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"haltio");
return;
case CLAW_START_READ:
CLAW_DBF_TEXT(4,trace,"ReadIRQ");
if (p_ch->irb->scsw.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,__FUNCTION__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"notrdy");
return;
}
if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
(p_ch->irb->scsw.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,__FUNCTION__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"PCI_read");
return;
}
if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
(p_ch->irb->scsw.stctl ==
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__FUNCTION__,__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,__FUNCTION__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"RdIRQXit");
return;
case CLAW_START_WRITE:
if (p_ch->irb->scsw.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,__FUNCTION__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"rstrtwrt");
return;
}
if (p_ch->irb->scsw.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.stctl & SCSW_STCTL_SEC_STATUS) ||
(p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
(p_ch->irb->scsw.stctl ==
(SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__FUNCTION__,__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,__FUNCTION__,__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,__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__,__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,__FUNCTION__,__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,__FUNCTION__);
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,__FUNCTION__,__LINE__);
#endif
return;
}
#ifdef DEBUGMSG
printk( KERN_INFO "%s:%s state-%02x\n" ,
dev->name,
__FUNCTION__,
p_ch->claw_state);
#endif
claw_strt_out_IO( dev );
#ifdef FUNCTRACE
printk(KERN_INFO "%s:%s Exit on line %d\n",
dev->name,__FUNCTION__,__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,__FUNCTION__);
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,__FUNCTION__,__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,__FUNCTION__);
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,__FUNCTION__,__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 inline
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",__FUNCTION__,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",
__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__,__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,__FUNCTION__);
printk(KERN_INFO "%s:%s Read active first/last changed \n",
dev->name,__FUNCTION__);
#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,__FUNCTION__);
#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,__FUNCTION__);
dumpit((char *)p_last, sizeof(struct ccwbk));
printk(KERN_INFO "%s:%s dump p_end CCW BK \n",dev->name,__FUNCTION__);
dumpit((char *)p_end, sizeof(struct endccw));
printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
dumpit((char *)p_first, sizeof(struct ccwbk));
printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
dev->name,__FUNCTION__);
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,__FUNCTION__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"addexit");
return 0;
} /* end of add_claw_reads */
/*-------------------------------------------------------------------*
* ccw_check_return_code *
* *
*-------------------------------------------------------------------*/
static void inline
ccw_check_return_code(struct ccw_device *cdev, int return_code)
{
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > enter \n",
cdev->dev.bus_id,__FUNCTION__);
#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,__FUNCTION__,__LINE__);
#endif
CLAW_DBF_TEXT(4,trace,"ccwret");
} /* end of ccw_check_return_code */
/*-------------------------------------------------------------------*
* ccw_check_unit_check *
*--------------------------------------------------------------------*/
static void inline
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,__FUNCTION__);
#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,__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__);
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= ( skb->len + privptr->p_env->write_size - 1) /
( 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 ,__FUNCTION__,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,__FUNCTION__,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,__FUNCTION__);
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,__FUNCTION__,
(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,__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__,
ccw_blocks_required);
printk(KERN_INFO "%s: %s() "
"PAGE_SIZE=0x%x\n",
dev->name,__FUNCTION__,
(unsigned int)PAGE_SIZE);
printk(KERN_INFO "%s: %s() > "
"PAGE_MASK=0x%x\n",
dev->name,__FUNCTION__,
(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=
(ccw_blocks_required+ccw_blocks_perpage -1) /
ccw_blocks_perpage;
#ifdef DEBUGMSG
printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
dev->name,__FUNCTION__,
ccw_blocks_perpage);
printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
dev->name,__FUNCTION__,
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= (privptr->p_env->read_buffers +
claw_reads_perpage -1) / claw_reads_perpage;
}
else { /* > or equal */
privptr->p_buff_pages_perread=
(privptr->p_env->read_size + PAGE_SIZE - 1) / 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=
(privptr->p_env->write_buffers + claw_writes_perpage -1) /
claw_writes_perpage;
}
else { /* > or equal */
privptr->p_buff_pages_perwrite=
(privptr->p_env->read_size + PAGE_SIZE - 1) / 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,__FUNCTION__,
claw_reads_perpage);
}
else {
printk(KERN_INFO "%s: %s() pages_perread=%d\n",
dev->name,__FUNCTION__,
privptr->p_buff_pages_perread);
}
printk(KERN_INFO "%s: %s() read_pages=%d\n",
dev->name,__FUNCTION__,
claw_read_pages);
if (privptr->p_env->write_size < PAGE_SIZE) {
printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
dev->name,__FUNCTION__,
claw_writes_perpage);
}
else {
printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
dev->name,__FUNCTION__,
privptr->p_buff_pages_perwrite);
}
printk(KERN_INFO "%s: %s() write_pages=%d\n",
dev->name,__FUNCTION__,
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,__FUNCTION__,
ccw_pages_required );
#ifdef FUNCTRACE
printk(KERN_INFO "%s: %s() > "
"exit on line %d, rc = ENOMEM\n",
dev->name,__FUNCTION__,
__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,__FUNCTION__);
#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,__FUNCTION__);
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,__FUNCTION__);
#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,__FUNCTION__);
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,__FUNCTION__);
#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,__FUNCTION__);
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,__FUNCTION__,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,__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__,
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,
__FUNCTION__,
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,
__FUNCTION__,
__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,__FUNCTION__);
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,__FUNCTION__,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,__FUNCTION__,__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,__FUNCTION__);
#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,__FUNCTION__);
#endif