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38ed18ff5e
linux/drivers/s390/net/claw.c
Heiko Carstens 38ed18ff5e claw: remove unused return code handling 
Remove unused return code handling. The claw driver is mostly dead, so
just make sure it keeps compiling without warnings.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-13 14:55:20 -04:00

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/*
* drivers/s390/net/claw.c
* 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 <linux/kernel_stat.h>
#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;
eieio();
}
static inline void
claw_clear_busy(struct net_device *dev)
{
clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
netif_wake_queue(dev);
eieio();
}
static inline int
claw_check_busy(struct net_device *dev)
{
eieio();
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);
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);
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",
},
.max_slaves = 2,
.driver_id = 0xC3D3C1E6,
.probe = 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,
};
static ssize_t
claw_driver_group_store(struct device_driver *ddrv, const char *buf,
size_t count)
{
int err;
err = ccwgroup_create_from_string(claw_root_dev,
claw_group_driver.driver_id,
&claw_ccw_driver, 2, buf);
return err ? err : count;
}
static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
static struct attribute *claw_group_attrs[] = {
&driver_attr_group.attr,
NULL,
};
static struct attribute_group claw_group_attr_group = {
.attrs = claw_group_attrs,
};
static const struct attribute_group *claw_group_attr_groups[] = {
&claw_group_attr_group,
NULL,
};
/*
* 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;
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;
rc = claw_add_files(&cgdev->dev);
if (rc) {
probe_error(cgdev);
put_device(&cgdev->dev);
dev_err(&cgdev->dev, "Creating the /proc files for a new"
" CLAW device failed\n");
CLAW_DBF_TEXT_(2, setup, "probex%d", rc);
return rc;
}
privptr->p_env->p_priv = privptr;
cgdev->cdev[0]->handler = claw_irq_handler;
cgdev->cdev[1]->handler = claw_irq_handler;
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->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;
kstat_cpu(smp_processor_id()).irqs[IOINT_CLW]++;
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);
claw_remove_files(&cgdev->dev);
kfree(priv->p_mtc_envelope);
priv->p_mtc_envelope=NULL;
kfree(priv->p_env);
priv->p_env=NULL;
kfree(priv->channel[0].irb);
priv->channel[0].irb=NULL;
kfree(priv->channel[1].irb);
priv->channel[1].irb=NULL;
kfree(priv);
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 int
claw_add_files(struct device *dev)
{
CLAW_DBF_TEXT(2, setup, "add_file");
return sysfs_create_group(&dev->kobj, &claw_attr_group);
}
static void
claw_remove_files(struct device *dev)
{
CLAW_DBF_TEXT(2, setup, "rem_file");
sysfs_remove_group(&dev->kobj, &claw_attr_group);
}
/*--------------------------------------------------------------------*
* claw_init and cleanup *
*---------------------------------------------------------------------*/
static void __exit
claw_cleanup(void)
{
driver_remove_file(&claw_group_driver.driver,
&driver_attr_group);
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_group_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 2000,2008 IBM Corporation\n");
MODULE_LICENSE("GPL");
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