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kernel-ark/drivers/s390/net/claw.c
Heiko Carstens a53c8fab3f s390/comments: unify copyright messages and remove file names 
Remove the file name from the comment at top of many files. In most
cases the file name was wrong anyway, so it's rather pointless.

Also unify the IBM copyright statement. We did have a lot of sightly
different statements and wanted to change them one after another
whenever a file gets touched. However that never happened. Instead
people start to take the old/"wrong" statements to use as a template
for new files.
So unify all of them in one go.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2012-07-20 11:15:04 +02:00

3384 lines
114 KiB
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/*
* ESCON CLAW network driver
*
* Linux for zSeries version
* Copyright IBM Corp. 2002, 2009
* 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
* 1.5
*/
#define KMSG_COMPONENT "claw"
#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 "claw.h"
/*
CLAW uses the s390dbf file system see claw_trace and claw_setup
*/
static char version[] __initdata = "CLAW driver";
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) {
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->ml_priv)->tbusy = 1;
}
static inline void
claw_clear_busy(struct net_device *dev)
{
clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
netif_wake_queue(dev);
}
static inline int
claw_check_busy(struct net_device *dev)
{
return ((struct claw_privbk *) dev->ml_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->ml_priv)->tbusy));
}
static inline void
claw_clearbit_busy(int nr,struct net_device *dev)
{
clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_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->ml_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);
/* 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);
/* 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);
static int claw_pm_prepare(struct ccwgroup_device *gdev)
{
return -EPERM;
}
/* the root device for claw group devices */
static struct device *claw_root_dev;
/* ccwgroup table */
static struct ccwgroup_driver claw_group_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "claw",
},
.setup = claw_probe,
.remove = claw_remove_device,
.set_online = claw_new_device,
.set_offline = claw_shutdown_device,
.prepare = claw_pm_prepare,
};
static struct ccw_device_id claw_ids[] = {
{CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw},
{},
};
MODULE_DEVICE_TABLE(ccw, claw_ids);
static struct ccw_driver claw_ccw_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "claw",
},
.ids = claw_ids,
.probe = ccwgroup_probe_ccwdev,
.remove = ccwgroup_remove_ccwdev,
.int_class = IOINT_CLW,
};
static ssize_t claw_driver_group_store(struct device_driver *ddrv,
const char *buf, size_t count)
{
int err;
err = ccwgroup_create_dev(claw_root_dev, &claw_group_driver, 2, buf);
return err ? err : count;
}
static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
static struct attribute *claw_drv_attrs[] = {
&driver_attr_group.attr,
NULL,
};
static struct attribute_group claw_drv_attr_group = {
.attrs = claw_drv_attrs,
};
static const struct attribute_group *claw_drv_attr_groups[] = {
&claw_drv_attr_group,
NULL,
};
/*
* Key functions
*/
/*-------------------------------------------------------------------*
* claw_tx *
*-------------------------------------------------------------------*/
static int
claw_tx(struct sk_buff *skb, struct net_device *dev)
{
int rc;
struct claw_privbk *privptr = dev->ml_priv;
unsigned long saveflags;
struct chbk *p_ch;
CLAW_DBF_TEXT(4, trace, "claw_tx");
p_ch = &privptr->channel[WRITE_CHANNEL];
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);
CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
if (rc)
rc = NETDEV_TX_BUSY;
else
rc = NETDEV_TX_OK;
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_CHANNEL];
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);
}
}
}
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->ml_priv;
int buff_size;
CLAW_DBF_TEXT(4, trace, "setmtu");
buff_size = privptr->p_env->write_size;
if ((new_mtu < 60) || (new_mtu > buff_size)) {
return -EINVAL;
}
dev->mtu = new_mtu;
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;
CLAW_DBF_TEXT(4, trace, "open");
privptr = (struct claw_privbk *)dev->ml_priv;
/* allocate and initialize CCW blocks */
if (privptr->buffs_alloc == 0) {
rc=init_ccw_bk(dev);
if (rc) {
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_CHANNEL].tasklet, claw_irq_tasklet,
(unsigned long) &privptr->channel[READ_CHANNEL]);
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_CHANNEL)
skb_queue_head_init(
&privptr->channel[WRITE_CHANNEL].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_CHANNEL].last_dstat |
privptr->channel[WRITE_CHANNEL].last_dstat) &
~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
(((privptr->channel[READ_CHANNEL].flag |
privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) {
dev_info(&privptr->channel[READ_CHANNEL].cdev->dev,
"%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_CHANNEL].flag = 0x00;
privptr->channel[WRITE_CHANNEL].flag = 0x00;
privptr->p_buff_ccw=NULL;
privptr->p_buff_read=NULL;
privptr->p_buff_write=NULL;
claw_clear_busy(dev);
CLAW_DBF_TEXT(2, trace, "open EIO");
return -EIO;
}
/* Send SystemValidate command */
claw_clear_busy(dev);
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;
CLAW_DBF_TEXT(4, trace, "clawirq");
/* Bypass all 'unsolicited interrupts' */
privptr = dev_get_drvdata(&cdev->dev);
if (!privptr) {
dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
" IRQ, c-%02x d-%02x\n",
irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
CLAW_DBF_TEXT(2, trace, "badirq");
return;
}
/* Try to extract channel from driver data. */
if (privptr->channel[READ_CHANNEL].cdev == cdev)
p_ch = &privptr->channel[READ_CHANNEL];
else if (privptr->channel[WRITE_CHANNEL].cdev == cdev)
p_ch = &privptr->channel[WRITE_CHANNEL];
else {
dev_warn(&cdev->dev, "The device is not a CLAW device\n");
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;
/* Copy interruption response block. */
memcpy(p_ch->irb, irb, sizeof(struct irb));
/* Check for good subchannel return code, otherwise info message */
if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
dev_info(&cdev->dev,
"%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);
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) */
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))))
return;
wake_up(&p_ch->wait); /* wake up claw_release */
CLAW_DBF_TEXT(4, trace, "stop");
return;
case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
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)))) {
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 {
dev_warn(&cdev->dev, "The CLAW device received"
" an unexpected IRQ, "
"c-%02x d-%02x\n",
irb->scsw.cmd.cstat,
irb->scsw.cmd.dstat);
return;
}
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++;
dev_info(&cdev->dev,
"%s: Restart is required after remote "
"side recovers \n",
dev->name);
}
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");
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)))) {
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");
CLAW_DBF_TEXT(4, trace, "RdIRQXit");
return;
case CLAW_START_WRITE:
if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
dev_info(&cdev->dev,
"%s: Unit Check Occurred in "
"write channel\n", dev->name);
clear_bit(0, (void *)&p_ch->IO_active);
if (p_ch->irb->ecw[0] & 0x80) {
dev_info(&cdev->dev,
"%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);
dev_info(&cdev->dev,
"%s: write connection "
"restarting\n", dev->name);
}
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);
dev_info(&cdev->dev,
"%s: Unit Exception "
"occurred 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)))) {
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_CHANNEL];
if (test_and_set_bit(CLAW_BH_ACTIVE,
(void *)&p_ch_r->flag_a) == 0)
tasklet_schedule(&p_ch_r->tasklet);
CLAW_DBF_TEXT(4, trace, "StWtExit");
return;
default:
dev_warn(&cdev->dev,
"The CLAW device for %s received an unexpected IRQ\n",
dev->name);
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;
p_ch = (struct chbk *) data;
dev = (struct net_device *)p_ch->ndev;
CLAW_DBF_TEXT(4, trace, "IRQtask");
unpack_read(dev);
clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
CLAW_DBF_TEXT(4, trace, "TskletXt");
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->ml_priv;
if (!privptr)
return 0;
CLAW_DBF_TEXT(4, trace, "release");
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_CHANNEL].timer); */
privptr->channel[i].claw_state = CLAW_STOP;
privptr->channel[i].IO_active = 0;
parm = (unsigned long) &privptr->channel[i];
if (i == WRITE_CHANNEL)
claw_purge_skb_queue(
&privptr->channel[WRITE_CHANNEL].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) {
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_CHANNEL].last_dstat |
privptr->channel[WRITE_CHANNEL].last_dstat) &
~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev,
"Deactivating %s completed with incorrect"
" subchannel status "
"(read %02x, write %02x)\n",
dev->name,
privptr->channel[READ_CHANNEL].last_dstat,
privptr->channel[WRITE_CHANNEL].last_dstat);
CLAW_DBF_TEXT(2, trace, "badclose");
}
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;
CLAW_DBF_TEXT(4, trace, "w_retry");
if (p_ch->claw_state == CLAW_STOP) {
return;
}
claw_strt_out_IO( dev );
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;
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->ml_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) {
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);
}
return;
} /* end of claw_write_next */
/*-------------------------------------------------------------------*
* *
* claw_timer *
*--------------------------------------------------------------------*/
static void
claw_timer ( struct chbk * p_ch )
{
CLAW_DBF_TEXT(4, trace, "timer");
p_ch->flag |= CLAW_TIMER;
wake_up(&p_ch->wait);
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;
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 */
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;
CLAW_DBF_TEXT(4, trace, "addreads");
privptr = dev->ml_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) {
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 ) {
privptr->p_read_active_first = p_first; /* set new first */
privptr->p_read_active_last = p_last; /* set new last */
}
else {
/* 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) */
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)
{
CLAW_DBF_TEXT(4, trace, "ccwret");
if (return_code != 0) {
switch (return_code) {
case -EBUSY: /* BUSY is a transient state no action needed */
break;
case -ENODEV:
dev_err(&cdev->dev, "The remote channel adapter is not"
" available\n");
break;
case -EINVAL:
dev_err(&cdev->dev,
"The status of the remote channel adapter"
" is not valid\n");
break;
default:
dev_err(&cdev->dev, "The common device layer"
" returned error code %d\n",
return_code);
}
}
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 *ndev = p_ch->ndev;
struct device *dev = &p_ch->cdev->dev;
CLAW_DBF_TEXT(4, trace, "unitchek");
dev_warn(dev, "The communication peer of %s disconnected\n",
ndev->name);
if (sense & 0x40) {
if (sense & 0x01) {
dev_warn(dev, "The remote channel adapter for"
" %s has been reset\n",
ndev->name);
}
} else if (sense & 0x20) {
if (sense & 0x04) {
dev_warn(dev, "A data streaming timeout occurred"
" for %s\n",
ndev->name);
} else if (sense & 0x10) {
dev_warn(dev, "The remote channel adapter for %s"
" is faulty\n",
ndev->name);
} else {
dev_warn(dev, "A data transfer parity error occurred"
" for %s\n",
ndev->name);
}
} else if (sense & 0x10) {
dev_warn(dev, "A read data parity error occurred"
" for %s\n",
ndev->name);
}
} /* end of ccw_check_unit_check */
/*-------------------------------------------------------------------*
* 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;
CLAW_DBF_TEXT(2, setup, "findlink");
privptr = dev->ml_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;
}
return rc;
} /* 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 claw_env *p_env;
struct clawph *pk_head;
struct chbk *ch;
CLAW_DBF_TEXT(4, trace, "hw_tx");
privptr = (struct claw_privbk *)(dev->ml_priv);
p_env =privptr->p_env;
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) {
ch = &privptr->channel[WRITE_CHANNEL];
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 */
ch = &privptr->channel[WRITE_CHANNEL];
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);
ch = &privptr->channel[WRITE_CHANNEL];
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) {
p_this_ccw=privptr->p_write_free_chain; /* get a block */
if (p_this_ccw == NULL) { /* lost the race */
ch = &privptr->channel[WRITE_CHANNEL];
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 */
if (len_of_data >= privptr->p_env->write_size)
bytesInThisBuffer = privptr->p_env->write_size;
else
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 */
}
/* 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) */
dev_kfree_skb_any(skb);
claw_strt_out_IO(dev );
/* if write free count is zero , set NOBUFFER */
if (privptr->write_free_count==0) {
claw_setbit_busy(TB_NOBUFFER,dev);
}
Done2:
claw_clearbit_busy(TB_TX,dev);
Done:
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->ml_priv;
struct clawh *pClawH=NULL;
addr_t real_TIC_address;
int i,j;
CLAW_DBF_TEXT(4, trace, "init_ccw");
/* 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;
/*
* 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);
/*
* 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;
}
/*
* 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) {
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 */
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;
/*
* Build a chain of CCWs
*
*/
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;
}
/*
* Initialize ClawSignalBlock
*
*/
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;
}
/*
* 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) {
privptr->p_buff_ccw=NULL;
return -ENOMEM;
}
/*
* Build CLAW write free chain
*
*/
memset(privptr->p_buff_write, 0x00,
ccw_pages_required * PAGE_SIZE);
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) );
if (p_buff==NULL) {
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;
}
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;
/*
* 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) {
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;
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
*
*/
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 */
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) {
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;
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 */
add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
privptr->buffs_alloc = 1;
return 0;
} /* end of init_ccw_bk */
/*-------------------------------------------------------------------*
* *
* probe_error *
* *
*--------------------------------------------------------------------*/
static void
probe_error( struct ccwgroup_device *cgdev)
{
struct claw_privbk *privptr;
CLAW_DBF_TEXT(4, trace, "proberr");
privptr = dev_get_drvdata(&cgdev->dev);
if (privptr != NULL) {
dev_set_drvdata(&cgdev->dev, NULL);
kfree(privptr->p_env);
kfree(privptr->p_mtc_envelope);
kfree(privptr);
}
} /* 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;
struct device *tdev;
CLAW_DBF_TEXT(2, setup, "clw_cntl");
udelay(1000); /* Wait a ms for the control packets to
*catch up to each other */
privptr = dev->ml_priv;
p_env=privptr->p_env;
tdev = &privptr->channel[READ_CHANNEL].cdev->dev;
memcpy( &temp_host_name, p_env->host_name, 8);
memcpy( &temp_ws_name, p_env->adapter_name , 8);
dev_info(tdev, "%s: CLAW device %.8s: "
"Received Control Packet\n",
dev->name, temp_ws_name);
if (privptr->release_pend==1) {
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));
}
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);
dev_warn(tdev, "The communication peer of %s"
" uses an incorrect API version %d\n",
dev->name, p_ctlbk->version);
}
p_sysval = (struct sysval *)&(p_ctlbk->data);
dev_info(tdev, "%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 (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);
dev_warn(tdev,
"Host name %s for %s does not match the"
" remote adapter name %s\n",
p_sysval->host_name,
dev->name,
temp_host_name);
}
if (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);
dev_warn(tdev, "Adapter name %s for %s does not match"
" the remote host name %s\n",
p_sysval->WS_name,
dev->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);
dev_warn(tdev,
"The local write buffer is smaller than the"
" remote read buffer\n");
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);
dev_warn(tdev,
"The local read buffer is smaller than the"
" remote write buffer\n");
CLAW_DBF_TEXT(2, setup, "rdsizbad");
}
claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
dev_info(tdev,
"CLAW device %.8s: System validate"
" completed.\n", temp_ws_name);
dev_info(tdev,
"%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);
dev_info(tdev,
"Settings for %s validated (version=%d, "
"remote device=%d, rc=%d, adapter 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:
dev_info(tdev, "%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:
dev_warn(tdev, "Validating %s failed because of"
" a host or adapter name mismatch\n",
dev->name);
break;
case CLAW_RC_WRONG_VERSION:
dev_warn(tdev, "Validating %s failed because of a"
" version conflict\n",
dev->name);
break;
case CLAW_RC_HOST_RCV_TOO_SMALL:
dev_warn(tdev, "Validating %s failed because of a"
" frame size conflict\n",
dev->name);
break;
default:
dev_warn(tdev, "The communication peer of %s rejected"
" the connection\n",
dev->name);
break;
}
break;
case CONNECTION_REQUEST:
p_connect = (struct conncmd *)&(p_ctlbk->data);
dev_info(tdev, "%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);
dev_info(tdev, "%s rejected a connection request"
" because it is already active\n",
dev->name);
}
if (p_ctlbk->linkid != 1) {
claw_snd_disc(dev, p_ctlbk);
dev_info(tdev, "%s rejected a request to open multiple"
" connections\n",
dev->name);
}
rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
if (rc != 0) {
claw_snd_disc(dev, p_ctlbk);
dev_info(tdev, "%s rejected a connection request"
" because of a type mismatch\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) {
p_env->packing = PACK_SEND;
claw_snd_conn_req(dev, 0);
}
dev_info(tdev, "%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_CHANNEL];
wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
break;
case CONNECTION_RESPONSE:
p_connect = (struct conncmd *)&(p_ctlbk->data);
dev_info(tdev, "%s: Recv 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) {
dev_warn(tdev, "The communication peer of %s rejected"
" a connection request\n",
dev->name);
return 1;
}
rc = find_link(dev,
p_connect->host_name, p_connect->WS_name);
if (rc != 0) {
claw_snd_disc(dev, p_ctlbk);
dev_warn(tdev, "The communication peer of %s"
" rejected a connection "
"request because of a type mismatch\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);
dev_info(tdev,
"%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) {
dev_info(tdev,
"%s: Confirmed Now packing\n", dev->name);
p_env->packing = DO_PACKED;
}
p_ch = &privptr->channel[WRITE_CHANNEL];
wake_up(&p_ch->wait);
} else {
dev_warn(tdev, "Activating %s failed because of"
" an incorrect link ID=%d\n",
dev->name, p_ctlbk->linkid);
claw_snd_disc(dev, p_ctlbk);
}
break;
case DISCONNECT:
dev_info(tdev, "%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:
dev_warn(tdev, "The communication peer of %s failed\n",
dev->name);
break;
default:
dev_warn(tdev, "The communication peer of %s sent"
" an unknown command code\n",
dev->name);
break;
}
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;
CLAW_DBF_TEXT(2, setup, "sndcntl");
privptr = dev->ml_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 biggest 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) {
return -ENOMEM;
}
memcpy(skb_put(skb, sizeof(struct clawctl)),
p_ctl, sizeof(struct clawctl));
if (privptr->p_env->packing >= PACK_SEND)
claw_hw_tx(skb, dev, 1);
else
claw_hw_tx(skb, dev, 0);
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->ml_priv;
struct clawctl *p_ctl;
CLAW_DBF_TEXT(2, setup, "snd_conn");
rc = 1;
p_ctl=(struct clawctl *)&privptr->ctl_bk;
p_ctl->linkid = link;
if ( privptr->system_validate_comp==0x00 ) {
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);
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;
CLAW_DBF_TEXT(2, setup, "snd_dsc");
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);
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;
CLAW_DBF_TEXT(2, setup, "chkresp");
privptr = dev->ml_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 );
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;
CLAW_DBF_TEXT(2, setup, "conn_req");
rc=claw_snd_conn_req(dev, 1);
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;
CLAW_DBF_TEXT(4, trace, "stats");
privptr = dev->ml_priv;
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;
struct device *p_dev;
__u32 len_of_data;
__u32 pack_off;
__u8 link_num;
__u8 mtc_this_frm=0;
__u32 bytes_to_mov;
int i=0;
int p=0;
CLAW_DBF_TEXT(4, trace, "unpkread");
p_first_ccw=NULL;
p_last_ccw=NULL;
p_packh=NULL;
p_packd=NULL;
privptr = dev->ml_priv;
p_dev = &privptr->channel[READ_CHANNEL].cdev->dev;
p_env = privptr->p_env;
p_this_ccw=privptr->p_read_active_first;
while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
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) {
mtc_this_frm=1;
if (p_this_ccw->header.length!=
privptr->p_env->read_size ) {
dev_warn(p_dev,
"The communication peer of %s"
" sent a faulty"
" frame of length %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;
}
goto NextFrame;
}
if (link_num==0) {
claw_process_control(dev, p_this_ccw);
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) || /* 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) {
/*
* 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 */
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);
}
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);
}
else {
dev_info(p_dev, "Allocating a buffer for"
" incoming data failed\n");
privptr->stats.rx_dropped++;
}
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 */
CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
add_claw_reads(dev, p_first_ccw, p_last_ccw);
claw_strt_read(dev, LOCK_YES);
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->ml_priv;
struct ccwbk*p_ccwbk;
struct chbk *p_ch;
struct clawh *p_clawh;
p_ch = &privptr->channel[READ_CHANNEL];
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 */
}
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) {
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 {
CLAW_DBF_TEXT(2, trace, "ReadAct");
}
if (lock==LOCK_YES) {
spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
}
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;
if (!dev) {
return;
}
privptr = (struct claw_privbk *)dev->ml_priv;
p_ch = &privptr->channel[WRITE_CHANNEL];
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) {
return;
}
if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
parm = (unsigned long) p_ch;
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;
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->ml_priv;
struct ccwbk*p_this_ccw;
struct ccwbk*p_next_ccw;
CLAW_DBF_TEXT(4, trace, "freewrtb");
/* scan the write queue to free any completed write packets */
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;
}
CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
return;
}
/*-------------------------------------------------------------------*
* claw free netdevice *
* *
*--------------------------------------------------------------------*/
static void
claw_free_netdevice(struct net_device * dev, int free_dev)
{
struct claw_privbk *privptr;
CLAW_DBF_TEXT(2, setup, "free_dev");
if (!dev)
return;
CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
privptr = dev->ml_priv;
if (dev->flags & IFF_RUNNING)
claw_release(dev);
if (privptr) {
privptr->channel[READ_CHANNEL].ndev = NULL; /* say it's free */
}
dev->ml_priv = NULL;
#ifdef MODULE
if (free_dev) {
free_netdev(dev);
}
#endif
CLAW_DBF_TEXT(2, setup, "free_ok");
}
/**
* Claw init netdevice
* Initialize everything of the net device except the name and the
* channel structs.
*/
static const struct net_device_ops claw_netdev_ops = {
.ndo_open = claw_open,
.ndo_stop = claw_release,
.ndo_get_stats = claw_stats,
.ndo_start_xmit = claw_tx,
.ndo_change_mtu = claw_change_mtu,
};
static void
claw_init_netdevice(struct net_device * dev)
{
CLAW_DBF_TEXT(2, setup, "init_dev");
CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
dev->mtu = CLAW_DEFAULT_MTU_SIZE;
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->type = ARPHRD_SLIP;
dev->tx_queue_len = 1300;
dev->flags = IFF_POINTOPOINT | IFF_NOARP;
dev->netdev_ops = &claw_netdev_ops;
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;
CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
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", dev_name(&cdev->dev));
ccw_device_get_id(cdev, &dev_id);
p_ch->devno = dev_id.devno;
if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
return -ENOMEM;
}
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;
dev_info(&cgdev->dev, "add for %s\n",
dev_name(&cgdev->cdev[READ_CHANNEL]->dev));
CLAW_DBF_TEXT(2, setup, "new_dev");
privptr = dev_get_drvdata(&cgdev->dev);
dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
if (!privptr)
return -ENODEV;
p_env = privptr->p_env;
ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id);
p_env->devno[READ_CHANNEL] = dev_id.devno;
ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id);
p_env->devno[WRITE_CHANNEL] = 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) {
dev_warn(&cgdev->dev, "Creating a CLAW group device"
" failed with error code %d\n", ret);
goto out;
}
ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]);
if (ret != 0) {
dev_warn(&cgdev->dev,
"Setting the read subchannel online"
" failed with error code %d\n", ret);
goto out;
}
ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]);
if (ret != 0) {
dev_warn(&cgdev->dev,
"Setting the write subchannel online "
"failed with error code %d\n", ret);
goto out;
}
dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
if (!dev) {
dev_warn(&cgdev->dev,
"Activating the CLAW device failed\n");
goto out;
}
dev->ml_priv = privptr;
dev_set_drvdata(&cgdev->dev, privptr);
dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, 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) {
unregister_netdev(dev);
claw_free_netdevice(dev,1);
CLAW_DBF_TEXT(2, trace, "ccwmem");
goto out;
}
}
privptr->channel[READ_CHANNEL].ndev = dev;
privptr->channel[WRITE_CHANNEL].ndev = dev;
privptr->p_env->ndev = dev;
dev_info(&cgdev->dev, "%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_CHANNEL],
p_env->devno[WRITE_CHANNEL]);
dev_info(&cgdev->dev, "%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 = 0;
CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
priv = dev_get_drvdata(&cgdev->dev);
if (!priv)
return -ENODEV;
ndev = priv->channel[READ_CHANNEL].ndev;
if (ndev) {
/* Close the device */
dev_info(&cgdev->dev, "%s: shutting down\n",
ndev->name);
if (ndev->flags & IFF_RUNNING)
ret = claw_release(ndev);
ndev->flags &=~IFF_RUNNING;
unregister_netdev(ndev);
ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
claw_free_netdevice(ndev, 1);
priv->channel[READ_CHANNEL].ndev = NULL;
priv->channel[WRITE_CHANNEL].ndev = NULL;
priv->p_env->ndev = NULL;
}
ccw_device_set_offline(cgdev->cdev[1]);
ccw_device_set_offline(cgdev->cdev[0]);
return ret;
}
static void
claw_remove_device(struct ccwgroup_device *cgdev)
{
struct claw_privbk *priv;
BUG_ON(!cgdev);
CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
priv = dev_get_drvdata(&cgdev->dev);
BUG_ON(!priv);
dev_info(&cgdev->dev, " will be removed.\n");
if (cgdev->state == CCWGROUP_ONLINE)
claw_shutdown_device(cgdev);
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);
dev_set_drvdata(&cgdev->dev, NULL);
dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL);
dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL);
put_device(&cgdev->dev);
return;
}
/*
* 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_get_drvdata(dev);
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_get_drvdata(dev);
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_get_drvdata(dev);
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_get_drvdata(dev);
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_get_drvdata(dev);
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_get_drvdata(dev);
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_get_drvdata(dev);
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_get_drvdata(dev);
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_get_drvdata(dev);
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_get_drvdata(dev);
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 const struct attribute_group *claw_attr_groups[] = {
&claw_attr_group,
NULL,
};
static const struct device_type claw_devtype = {
.name = "claw",
.groups = claw_attr_groups,
};
/*----------------------------------------------------------------*
* claw_probe *
* this function is called for each CLAW device. *
*----------------------------------------------------------------*/
static int claw_probe(struct ccwgroup_device *cgdev)
{
struct claw_privbk *privptr = NULL;
CLAW_DBF_TEXT(2, setup, "probe");
if (!get_device(&cgdev->dev))
return -ENODEV;
privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
dev_set_drvdata(&cgdev->dev, privptr);
if (privptr == NULL) {
probe_error(cgdev);
put_device(&cgdev->dev);
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);
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;
privptr->p_env->p_priv = privptr;
cgdev->cdev[0]->handler = claw_irq_handler;
cgdev->cdev[1]->handler = claw_irq_handler;
cgdev->dev.type = &claw_devtype;
CLAW_DBF_TEXT(2, setup, "prbext 0");
return 0;
} /* end of claw_probe */
/*--------------------------------------------------------------------*
* claw_init and cleanup *
*---------------------------------------------------------------------*/
static void __exit claw_cleanup(void)
{
ccwgroup_driver_unregister(&claw_group_driver);
ccw_driver_unregister(&claw_ccw_driver);
root_device_unregister(claw_root_dev);
claw_unregister_debug_facility();
pr_info("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;
pr_info("Loading %s\n", version);
ret = claw_register_debug_facility();
if (ret) {
pr_err("Registering with the S/390 debug feature"
" failed with error code %d\n", ret);
goto out_err;
}
CLAW_DBF_TEXT(2, setup, "init_mod");
claw_root_dev = root_device_register("claw");
ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0;
if (ret)
goto register_err;
ret = ccw_driver_register(&claw_ccw_driver);
if (ret)
goto ccw_err;
claw_group_driver.driver.groups = claw_drv_attr_groups;
ret = ccwgroup_driver_register(&claw_group_driver);
if (ret)
goto ccwgroup_err;
return 0;
ccwgroup_err:
ccw_driver_unregister(&claw_ccw_driver);
ccw_err:
root_device_unregister(claw_root_dev);
register_err:
CLAW_DBF_TEXT(2, setup, "init_bad");
claw_unregister_debug_facility();
out_err:
pr_err("Initializing the claw device driver failed\n");
return ret;
}
module_init(claw_init);
module_exit(claw_cleanup);
MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
"Copyright IBM Corp. 2000, 2008\n");
MODULE_LICENSE("GPL");
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