--- /dev/null
+/*
+ * drivers/s390/net/claw.c
+ * ESCON CLAW network driver
+ *
+ * $Revision: 1.35 $ $Date: 2005/03/24 12:25:38 $
+ *
+ * Linux fo zSeries version
+ * Copyright (C) 2002,2005 IBM Corporation
+ * Author(s) Original code written by:
+ * Kazuo Iimura (iimura@jp.ibm.com)
+ * Rewritten by
+ * Andy Richter (richtera@us.ibm.com)
+ * Marc Price (mwprice@us.ibm.com)
+ *
+ * sysfs parms:
+ * group x.x.rrrr,x.x.wwww
+ * read_buffer nnnnnnn
+ * write_buffer nnnnnn
+ * host_name aaaaaaaa
+ * adapter_name aaaaaaaa
+ * api_type aaaaaaaa
+ *
+ * eg.
+ * group 0.0.0200 0.0.0201
+ * read_buffer 25
+ * write_buffer 20
+ * host_name LINUX390
+ * adapter_name RS6K
+ * api_type TCPIP
+ *
+ * where
+ *
+ * The device id is decided by the order entries
+ * are added to the group the first is claw0 the second claw1
+ * up to CLAW_MAX_DEV
+ *
+ * rrrr - the first of 2 consecutive device addresses used for the
+ * CLAW protocol.
+ * The specified address is always used as the input (Read)
+ * channel and the next address is used as the output channel.
+ *
+ * wwww - the second of 2 consecutive device addresses used for
+ * the CLAW protocol.
+ * The specified address is always used as the output
+ * channel and the previous address is used as the input channel.
+ *
+ * read_buffer - specifies number of input buffers to allocate.
+ * write_buffer - specifies number of output buffers to allocate.
+ * host_name - host name
+ * adaptor_name - adaptor name
+ * api_type - API type TCPIP or API will be sent and expected
+ * as ws_name
+ *
+ * Note the following requirements:
+ * 1) host_name must match the configured adapter_name on the remote side
+ * 2) adaptor_name must match the configured host name on the remote side
+ *
+ * Change History
+ * 1.00 Initial release shipped
+ * 1.10 Changes for Buffer allocation
+ * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
+ * 1.25 Added Packing support
+ */
+#include <asm/bitops.h>
+#include <asm/ccwdev.h>
+#include <asm/ccwgroup.h>
+#include <asm/debug.h>
+#include <asm/idals.h>
+#include <asm/io.h>
+
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/tcp.h>
+#include <linux/timer.h>
+#include <linux/types.h>
+#include <linux/version.h>
+
+#include "cu3088.h"
+#include "claw.h"
+
+MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
+MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
+ "Copyright 2000,2005 IBM Corporation\n");
+MODULE_LICENSE("GPL");
+
+/* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE options:
+ DEBUGMSG - Enables output of various debug messages in the code
+ IOTRACE - Enables output of CCW and other IO related traces
+ FUNCTRACE - Enables output of function entry/exit trace
+ Define any combination of above options to enable tracing
+
+ CLAW also uses the s390dbf file system see claw_trace and claw_setup
+*/
+
+/* following enables tracing */
+//#define DEBUGMSG
+//#define IOTRACE
+//#define FUNCTRACE
+
+#ifdef DEBUGMSG
+#define DEBUG
+#endif
+
+#ifdef IOTRACE
+#define DEBUG
+#endif
+
+#ifdef FUNCTRACE
+#define DEBUG
+#endif
+
+ char debug_buffer[255];
+/**
+ * Debug Facility Stuff
+ */
+static debug_info_t *claw_dbf_setup;
+static debug_info_t *claw_dbf_trace;
+
+/**
+ * CLAW Debug Facility functions
+ */
+static void
+claw_unregister_debug_facility(void)
+{
+ if (claw_dbf_setup)
+ debug_unregister(claw_dbf_setup);
+ if (claw_dbf_trace)
+ debug_unregister(claw_dbf_trace);
+}
+
+static int
+claw_register_debug_facility(void)
+{
+ claw_dbf_setup = debug_register("claw_setup", 1, 1, 8);
+ claw_dbf_trace = debug_register("claw_trace", 1, 2, 8);
+ if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
+ printk(KERN_WARNING "Not enough memory for debug facility.\n");
+ claw_unregister_debug_facility();
+ return -ENOMEM;
+ }
+ debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
+ debug_set_level(claw_dbf_setup, 2);
+ debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
+ debug_set_level(claw_dbf_trace, 2);
+ return 0;
+}
+
+static inline void
+claw_set_busy(struct net_device *dev)
+{
+ ((struct claw_privbk *) dev->priv)->tbusy=1;
+ eieio();
+}
+
+static inline void
+claw_clear_busy(struct net_device *dev)
+{
+ clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
+ netif_wake_queue(dev);
+ eieio();
+}
+
+static inline int
+claw_check_busy(struct net_device *dev)
+{
+ eieio();
+ return ((struct claw_privbk *) dev->priv)->tbusy;
+}
+
+static inline void
+claw_setbit_busy(int nr,struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
+}
+
+static inline void
+claw_clearbit_busy(int nr,struct net_device *dev)
+{
+ clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
+ netif_wake_queue(dev);
+}
+
+static inline int
+claw_test_and_setbit_busy(int nr,struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return test_and_set_bit(nr,
+ (void *)&(((struct claw_privbk *) dev->priv)->tbusy));
+}
+
+
+/* Functions for the DEV methods */
+
+static int claw_probe(struct ccwgroup_device *cgdev);
+static void claw_remove_device(struct ccwgroup_device *cgdev);
+static void claw_purge_skb_queue(struct sk_buff_head *q);
+static int claw_new_device(struct ccwgroup_device *cgdev);
+static int claw_shutdown_device(struct ccwgroup_device *cgdev);
+static int claw_tx(struct sk_buff *skb, struct net_device *dev);
+static int claw_change_mtu( struct net_device *dev, int new_mtu);
+static int claw_open(struct net_device *dev);
+static void claw_irq_handler(struct ccw_device *cdev,
+ unsigned long intparm, struct irb *irb);
+static void claw_irq_tasklet ( unsigned long data );
+static int claw_release(struct net_device *dev);
+static void claw_write_retry ( struct chbk * p_ch );
+static void claw_write_next ( struct chbk * p_ch );
+static void claw_timer ( struct chbk * p_ch );
+
+/* Functions */
+static int add_claw_reads(struct net_device *dev,
+ struct ccwbk* p_first, struct ccwbk* p_last);
+static void inline ccw_check_return_code (struct ccw_device *cdev,
+ int return_code);
+static void inline ccw_check_unit_check (struct chbk * p_ch,
+ unsigned char sense );
+static int find_link(struct net_device *dev, char *host_name, char *ws_name );
+static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
+static int init_ccw_bk(struct net_device *dev);
+static void probe_error( struct ccwgroup_device *cgdev);
+static struct net_device_stats *claw_stats(struct net_device *dev);
+static int inline pages_to_order_of_mag(int num_of_pages);
+static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
+#ifdef DEBUG
+static void dumpit (char *buf, int len);
+#endif
+/* sysfs Functions */
+static ssize_t claw_hname_show(struct device *dev, char *buf);
+static ssize_t claw_hname_write(struct device *dev,
+ const char *buf, size_t count);
+static ssize_t claw_adname_show(struct device *dev, char *buf);
+static ssize_t claw_adname_write(struct device *dev,
+ const char *buf, size_t count);
+static ssize_t claw_apname_show(struct device *dev, char *buf);
+static ssize_t claw_apname_write(struct device *dev,
+ const char *buf, size_t count);
+static ssize_t claw_wbuff_show(struct device *dev, char *buf);
+static ssize_t claw_wbuff_write(struct device *dev,
+ const char *buf, size_t count);
+static ssize_t claw_rbuff_show(struct device *dev, char *buf);
+static ssize_t claw_rbuff_write(struct device *dev,
+ const char *buf, size_t count);
+static int claw_add_files(struct device *dev);
+static void claw_remove_files(struct device *dev);
+
+/* Functions for System Validate */
+static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
+static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
+ __u8 correlator, __u8 rc , char *local_name, char *remote_name);
+static int claw_snd_conn_req(struct net_device *dev, __u8 link);
+static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
+static int claw_snd_sys_validate_rsp(struct net_device *dev,
+ struct clawctl * p_ctl, __u32 return_code);
+static int claw_strt_conn_req(struct net_device *dev );
+static void claw_strt_read ( struct net_device *dev, int lock );
+static void claw_strt_out_IO( struct net_device *dev );
+static void claw_free_wrt_buf( struct net_device *dev );
+
+/* Functions for unpack reads */
+static void unpack_read (struct net_device *dev );
+
+/* ccwgroup table */
+
+static struct ccwgroup_driver claw_group_driver = {
+ .owner = THIS_MODULE,
+ .name = "claw",
+ .max_slaves = 2,
+ .driver_id = 0xC3D3C1E6,
+ .probe = claw_probe,
+ .remove = claw_remove_device,
+ .set_online = claw_new_device,
+ .set_offline = claw_shutdown_device,
+};
+
+/*
+*
+* Key functions
+*/
+
+/*----------------------------------------------------------------*
+ * claw_probe *
+ * this function is called for each CLAW device. *
+ *----------------------------------------------------------------*/
+static int
+claw_probe(struct ccwgroup_device *cgdev)
+{
+ int rc;
+ struct claw_privbk *privptr=NULL;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s Enter\n",__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"probe");
+ if (!get_device(&cgdev->dev))
+ return -ENODEV;
+#ifdef DEBUGMSG
+ printk(KERN_INFO "claw: variable cgdev =\n");
+ dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
+#endif
+ privptr = kmalloc(sizeof(struct claw_privbk), GFP_KERNEL);
+ if (privptr == NULL) {
+ probe_error(cgdev);
+ put_device(&cgdev->dev);
+ printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
+ cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
+ CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
+ return -ENOMEM;
+ }
+ memset(privptr,0x00,sizeof(struct claw_privbk));
+ privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
+ privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
+ if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
+ probe_error(cgdev);
+ put_device(&cgdev->dev);
+ printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
+ cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
+ CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
+ return -ENOMEM;
+ }
+ memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
+ memset(privptr->p_env, 0x00, sizeof(struct claw_env));
+ memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
+ memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
+ memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
+ privptr->p_env->packing = 0;
+ privptr->p_env->write_buffers = 5;
+ privptr->p_env->read_buffers = 5;
+ privptr->p_env->read_size = CLAW_FRAME_SIZE;
+ privptr->p_env->write_size = CLAW_FRAME_SIZE;
+ rc = claw_add_files(&cgdev->dev);
+ if (rc) {
+ probe_error(cgdev);
+ put_device(&cgdev->dev);
+ printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
+ cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
+ CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
+ return rc;
+ }
+ printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
+ privptr->p_env->p_priv = privptr;
+ cgdev->cdev[0]->handler = claw_irq_handler;
+ cgdev->cdev[1]->handler = claw_irq_handler;
+ cgdev->dev.driver_data = privptr;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "claw:%s exit on line %d, "
+ "rc = 0\n",__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"prbext 0");
+
+ return 0;
+} /* end of claw_probe */
+
+/*-------------------------------------------------------------------*
+ * claw_tx *
+ *-------------------------------------------------------------------*/
+
+static int
+claw_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ int rc;
+ struct claw_privbk *privptr=dev->priv;
+ unsigned long saveflags;
+ struct chbk *p_ch;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"claw_tx");
+ p_ch=&privptr->channel[WRITE];
+ if (skb == NULL) {
+ printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
+ dev->name);
+ privptr->stats.tx_dropped++;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
+ dev->name,__FUNCTION__, __LINE__);
+#endif
+ CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
+ return -EIO;
+ }
+
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
+ dumpit((char *) skb, sizeof(struct sk_buff));
+ printk(KERN_INFO "%s: variable dev=\n",dev->name);
+ dumpit((char *) dev, sizeof(struct net_device));
+#endif
+ spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
+ rc=claw_hw_tx( skb, dev, 1 );
+ spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
+ dev->name, __FUNCTION__, __LINE__, rc);
+#endif
+ CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
+ return rc;
+} /* end of claw_tx */
+
+/*------------------------------------------------------------------*
+ * pack the collect queue into an skb and return it *
+ * If not packing just return the top skb from the queue *
+ *------------------------------------------------------------------*/
+
+static struct sk_buff *
+claw_pack_skb(struct claw_privbk *privptr)
+{
+ struct sk_buff *new_skb,*held_skb;
+ struct chbk *p_ch = &privptr->channel[WRITE];
+ struct claw_env *p_env = privptr->p_env;
+ int pkt_cnt,pk_ind,so_far;
+
+ new_skb = NULL; /* assume no dice */
+ pkt_cnt = 0;
+ CLAW_DBF_TEXT(4,trace,"PackSKBe");
+ if (skb_queue_len(&p_ch->collect_queue) > 0) {
+ /* some data */
+ held_skb = skb_dequeue(&p_ch->collect_queue);
+ if (p_env->packing != DO_PACKED)
+ return held_skb;
+ if (held_skb)
+ atomic_dec(&held_skb->users);
+ else
+ return NULL;
+ /* 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_irq(held_skb);
+ held_skb = skb_dequeue(&p_ch->collect_queue);
+ if (held_skb)
+ atomic_dec(&held_skb->users);
+ } else {
+ pk_ind = 0;
+ atomic_inc(&held_skb->users);
+ skb_queue_head(&p_ch->collect_queue,held_skb);
+ }
+ }
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: %s() Packed %d len %d\n",
+ p_env->ndev->name,
+ __FUNCTION__,pkt_cnt,new_skb->len);
+#endif
+ }
+ CLAW_DBF_TEXT(4,trace,"PackSKBx");
+ return new_skb;
+}
+
+/*-------------------------------------------------------------------*
+ * claw_change_mtu *
+ * *
+ *-------------------------------------------------------------------*/
+
+static int
+claw_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct claw_privbk *privptr=dev->priv;
+ int buff_size;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
+#endif
+#ifdef DEBUGMSG
+ printk(KERN_INFO "variable dev =\n");
+ dumpit((char *) dev, sizeof(struct net_device));
+ printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
+#endif
+ CLAW_DBF_TEXT(4,trace,"setmtu");
+ buff_size = privptr->p_env->write_size;
+ if ((new_mtu < 60) || (new_mtu > buff_size)) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
+ dev->name,
+ __FUNCTION__, __LINE__);
+#endif
+ return -EINVAL;
+ }
+ dev->mtu = new_mtu;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
+ __FUNCTION__, __LINE__);
+#endif
+ return 0;
+} /* end of claw_change_mtu */
+
+
+/*-------------------------------------------------------------------*
+ * claw_open *
+ * *
+ *-------------------------------------------------------------------*/
+static int
+claw_open(struct net_device *dev)
+{
+
+ int rc;
+ int i;
+ unsigned long saveflags=0;
+ unsigned long parm;
+ struct claw_privbk *privptr;
+ DECLARE_WAITQUEUE(wait, current);
+ struct timer_list timer;
+ struct ccwbk *p_buf;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"open");
+ if (!dev | (dev->name[0] == 0x00)) {
+ CLAW_DBF_TEXT(2,trace,"BadDev");
+ printk(KERN_WARNING "claw: Bad device at open failing \n");
+ return -ENODEV;
+ }
+ privptr = (struct claw_privbk *)dev->priv;
+ /* allocate and initialize CCW blocks */
+ if (privptr->buffs_alloc == 0) {
+ rc=init_ccw_bk(dev);
+ if (rc) {
+ printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
+ dev->name,
+ __FUNCTION__, __LINE__);
+ CLAW_DBF_TEXT(2,trace,"openmem");
+ return -ENOMEM;
+ }
+ }
+ privptr->system_validate_comp=0;
+ privptr->release_pend=0;
+ if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
+ privptr->p_env->read_size=DEF_PACK_BUFSIZE;
+ privptr->p_env->write_size=DEF_PACK_BUFSIZE;
+ privptr->p_env->packing=PACKING_ASK;
+ } else {
+ privptr->p_env->packing=0;
+ privptr->p_env->read_size=CLAW_FRAME_SIZE;
+ privptr->p_env->write_size=CLAW_FRAME_SIZE;
+ }
+ claw_set_busy(dev);
+ tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
+ (unsigned long) &privptr->channel[READ]);
+ for ( i = 0; i < 2; i++) {
+ CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
+ init_waitqueue_head(&privptr->channel[i].wait);
+ /* skb_queue_head_init(&p_ch->io_queue); */
+ if (i == WRITE)
+ skb_queue_head_init(
+ &privptr->channel[WRITE].collect_queue);
+ privptr->channel[i].flag_a = 0;
+ privptr->channel[i].IO_active = 0;
+ privptr->channel[i].flag &= ~CLAW_TIMER;
+ init_timer(&timer);
+ timer.function = (void *)claw_timer;
+ timer.data = (unsigned long)(&privptr->channel[i]);
+ timer.expires = jiffies + 15*HZ;
+ add_timer(&timer);
+ spin_lock_irqsave(get_ccwdev_lock(
+ privptr->channel[i].cdev), saveflags);
+ parm = (unsigned long) &privptr->channel[i];
+ privptr->channel[i].claw_state = CLAW_START_HALT_IO;
+ rc = 0;
+ add_wait_queue(&privptr->channel[i].wait, &wait);
+ rc = ccw_device_halt(
+ (struct ccw_device *)privptr->channel[i].cdev,parm);
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(
+ get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
+ schedule();
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&privptr->channel[i].wait, &wait);
+ if(rc != 0)
+ ccw_check_return_code(privptr->channel[i].cdev, rc);
+ if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
+ del_timer(&timer);
+ }
+ if ((((privptr->channel[READ].last_dstat |
+ privptr->channel[WRITE].last_dstat) &
+ ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
+ (((privptr->channel[READ].flag |
+ privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: channel problems during open - read:"
+ " %02x - write: %02x\n",
+ dev->name,
+ privptr->channel[READ].last_dstat,
+ privptr->channel[WRITE].last_dstat);
+#endif
+ printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
+ CLAW_DBF_TEXT(2,trace,"notrdy");
+
+ for ( i = 0; i < 2; i++) {
+ spin_lock_irqsave(
+ get_ccwdev_lock(privptr->channel[i].cdev),
+ saveflags);
+ parm = (unsigned long) &privptr->channel[i];
+ privptr->channel[i].claw_state = CLAW_STOP;
+ rc = ccw_device_halt(
+ (struct ccw_device *)&privptr->channel[i].cdev,
+ parm);
+ spin_unlock_irqrestore(
+ get_ccwdev_lock(privptr->channel[i].cdev),
+ saveflags);
+ if (rc != 0) {
+ ccw_check_return_code(
+ privptr->channel[i].cdev, rc);
+ }
+ }
+ free_pages((unsigned long)privptr->p_buff_ccw,
+ (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
+ if (privptr->p_env->read_size < PAGE_SIZE) {
+ free_pages((unsigned long)privptr->p_buff_read,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_read_num));
+ }
+ else {
+ p_buf=privptr->p_read_active_first;
+ while (p_buf!=NULL) {
+ free_pages((unsigned long)p_buf->p_buffer,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_pages_perread ));
+ p_buf=p_buf->next;
+ }
+ }
+ if (privptr->p_env->write_size < PAGE_SIZE ) {
+ free_pages((unsigned long)privptr->p_buff_write,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_write_num));
+ }
+ else {
+ p_buf=privptr->p_write_active_first;
+ while (p_buf!=NULL) {
+ free_pages((unsigned long)p_buf->p_buffer,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_pages_perwrite ));
+ p_buf=p_buf->next;
+ }
+ }
+ privptr->buffs_alloc = 0;
+ privptr->channel[READ].flag= 0x00;
+ privptr->channel[WRITE].flag = 0x00;
+ privptr->p_buff_ccw=NULL;
+ privptr->p_buff_read=NULL;
+ privptr->p_buff_write=NULL;
+ claw_clear_busy(dev);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(2,trace,"open EIO");
+ return -EIO;
+ }
+
+ /* Send SystemValidate command */
+
+ claw_clear_busy(dev);
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"openok");
+ return 0;
+} /* end of claw_open */
+
+/*-------------------------------------------------------------------*
+* *
+* claw_irq_handler *
+* *
+*--------------------------------------------------------------------*/
+static void
+claw_irq_handler(struct ccw_device *cdev,
+ unsigned long intparm, struct irb *irb)
+{
+ struct chbk *p_ch = NULL;
+ struct claw_privbk *privptr = NULL;
+ struct net_device *dev = NULL;
+ struct claw_env *p_env;
+ struct chbk *p_ch_r=NULL;
+
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s enter \n",__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"clawirq");
+ /* Bypass all 'unsolicited interrupts' */
+ if (!cdev->dev.driver_data) {
+ printk(KERN_WARNING "claw: unsolicited interrupt for device:"
+ "%s received c-%02x d-%02x\n",
+ cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "claw: %s() "
+ "exit on line %d\n",__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(2,trace,"badirq");
+ return;
+ }
+ privptr = (struct claw_privbk *)cdev->dev.driver_data;
+
+ /* Try to extract channel from driver data. */
+ if (privptr->channel[READ].cdev == cdev)
+ p_ch = &privptr->channel[READ];
+ else if (privptr->channel[WRITE].cdev == cdev)
+ p_ch = &privptr->channel[WRITE];
+ else {
+ printk(KERN_WARNING "claw: Can't determine channel for "
+ "interrupt, device %s\n", cdev->dev.bus_id);
+ CLAW_DBF_TEXT(2,trace,"badchan");
+ return;
+ }
+ CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
+
+ dev = (struct net_device *) (p_ch->ndev);
+ p_env=privptr->p_env;
+
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: interrupt for device: %04x "
+ "received c-%02x d-%02x state-%02x\n",
+ dev->name, p_ch->devno, irb->scsw.cstat,
+ irb->scsw.dstat, p_ch->claw_state);
+#endif
+
+ /* Copy interruption response block. */
+ memcpy(p_ch->irb, irb, sizeof(struct irb));
+
+ /* Check for good subchannel return code, otherwise error message */
+ if (irb->scsw.cstat && !(irb->scsw.cstat & SCHN_STAT_PCI)) {
+ printk(KERN_INFO "%s: subchannel check for device: %04x -"
+ " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
+ dev->name, p_ch->devno,
+ irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
+#ifdef IOTRACE
+ dumpit((char *)irb,sizeof(struct irb));
+ dumpit((char *)(unsigned long)irb->scsw.cpa,
+ sizeof(struct ccw1));
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(2,trace,"chanchk");
+ /* return; */
+ }
+
+ /* Check the reason-code of a unit check */
+ if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
+ ccw_check_unit_check(p_ch, irb->ecw[0]);
+ }
+
+ /* State machine to bring the connection up, down and to restart */
+ p_ch->last_dstat = irb->scsw.dstat;
+
+ switch (p_ch->claw_state) {
+ case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
+#endif
+ if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+ (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+ (p_ch->irb->scsw.stctl ==
+ (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return;
+ }
+ wake_up(&p_ch->wait); /* wake up claw_release */
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"stop");
+ return;
+
+ case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
+ dev->name);
+#endif
+ if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+ (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+ (p_ch->irb->scsw.stctl ==
+ (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"haltio");
+ return;
+ }
+ if (p_ch->flag == CLAW_READ) {
+ p_ch->claw_state = CLAW_START_READ;
+ wake_up(&p_ch->wait); /* wake claw_open (READ)*/
+ }
+ else
+ if (p_ch->flag == CLAW_WRITE) {
+ p_ch->claw_state = CLAW_START_WRITE;
+ /* send SYSTEM_VALIDATE */
+ claw_strt_read(dev, LOCK_NO);
+ claw_send_control(dev,
+ SYSTEM_VALIDATE_REQUEST,
+ 0, 0, 0,
+ p_env->host_name,
+ p_env->adapter_name );
+ } else {
+ printk(KERN_WARNING "claw: unsolicited "
+ "interrupt for device:"
+ "%s received c-%02x d-%02x\n",
+ cdev->dev.bus_id,
+ irb->scsw.cstat,
+ irb->scsw.dstat);
+ return;
+ }
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
+ dev->name);
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"haltio");
+ return;
+ case CLAW_START_READ:
+ CLAW_DBF_TEXT(4,trace,"ReadIRQ");
+ if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
+ clear_bit(0, (void *)&p_ch->IO_active);
+ if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
+ (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
+ (p_ch->irb->ecw[0]) == 0)
+ {
+ privptr->stats.rx_errors++;
+ printk(KERN_INFO "%s: Restart is "
+ "required after remote "
+ "side recovers \n",
+ dev->name);
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"notrdy");
+ return;
+ }
+ if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
+ (p_ch->irb->scsw.dstat==0)) {
+ if (test_and_set_bit(CLAW_BH_ACTIVE,
+ (void *)&p_ch->flag_a) == 0) {
+ tasklet_schedule(&p_ch->tasklet);
+ }
+ else {
+ CLAW_DBF_TEXT(4,trace,"PCINoBH");
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"PCI_read");
+ return;
+ }
+ if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+ (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+ (p_ch->irb->scsw.stctl ==
+ (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"SPend_rd");
+ return;
+ }
+ clear_bit(0, (void *)&p_ch->IO_active);
+ claw_clearbit_busy(TB_RETRY,dev);
+ if (test_and_set_bit(CLAW_BH_ACTIVE,
+ (void *)&p_ch->flag_a) == 0) {
+ tasklet_schedule(&p_ch->tasklet);
+ }
+ else {
+ CLAW_DBF_TEXT(4,trace,"RdBHAct");
+ }
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
+ dev->name);
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"RdIRQXit");
+ return;
+ case CLAW_START_WRITE:
+ if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
+ printk(KERN_INFO "%s: Unit Check Occured in "
+ "write channel\n",dev->name);
+ clear_bit(0, (void *)&p_ch->IO_active);
+ if (p_ch->irb->ecw[0] & 0x80 ) {
+ printk(KERN_INFO "%s: Resetting Event "
+ "occurred:\n",dev->name);
+ init_timer(&p_ch->timer);
+ p_ch->timer.function =
+ (void *)claw_write_retry;
+ p_ch->timer.data = (unsigned long)p_ch;
+ p_ch->timer.expires = jiffies + 10*HZ;
+ add_timer(&p_ch->timer);
+ printk(KERN_INFO "%s: write connection "
+ "restarting\n",dev->name);
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"rstrtwrt");
+ return;
+ }
+ if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
+ clear_bit(0, (void *)&p_ch->IO_active);
+ printk(KERN_INFO "%s: Unit Exception "
+ "Occured in write channel\n",
+ dev->name);
+ }
+ if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
+ (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
+ (p_ch->irb->scsw.stctl ==
+ (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"writeUE");
+ return;
+ }
+ clear_bit(0, (void *)&p_ch->IO_active);
+ if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
+ claw_write_next(p_ch);
+ claw_clearbit_busy(TB_TX,dev);
+ claw_clear_busy(dev);
+ }
+ p_ch_r=(struct chbk *)&privptr->channel[READ];
+ if (test_and_set_bit(CLAW_BH_ACTIVE,
+ (void *)&p_ch_r->flag_a) == 0) {
+ tasklet_schedule(&p_ch_r->tasklet);
+ }
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
+ dev->name);
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"StWtExit");
+ return;
+ default:
+ printk(KERN_WARNING "%s: wrong selection code - irq "
+ "state=%d\n",dev->name,p_ch->claw_state);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(2,trace,"badIRQ");
+ return;
+ }
+
+} /* end of claw_irq_handler */
+
+
+/*-------------------------------------------------------------------*
+* claw_irq_tasklet *
+* *
+*--------------------------------------------------------------------*/
+static void
+claw_irq_tasklet ( unsigned long data )
+{
+ struct chbk * p_ch;
+ struct net_device *dev;
+ struct claw_privbk * privptr;
+
+ p_ch = (struct chbk *) data;
+ dev = (struct net_device *)p_ch->ndev;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
+#endif
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
+ dumpit((char *) p_ch, sizeof(struct chbk));
+#endif
+ CLAW_DBF_TEXT(4,trace,"IRQtask");
+
+ privptr = (struct claw_privbk *) dev->priv;
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
+ dev->name, p_ch->claw_state);
+#endif
+
+ unpack_read(dev);
+ clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
+ CLAW_DBF_TEXT(4,trace,"TskletXt");
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return;
+} /* end of claw_irq_bh */
+
+/*-------------------------------------------------------------------*
+* claw_release *
+* *
+*--------------------------------------------------------------------*/
+static int
+claw_release(struct net_device *dev)
+{
+ int rc;
+ int i;
+ unsigned long saveflags;
+ unsigned long parm;
+ struct claw_privbk *privptr;
+ DECLARE_WAITQUEUE(wait, current);
+ struct ccwbk* p_this_ccw;
+ struct ccwbk* p_buf;
+
+ if (!dev)
+ return 0;
+ privptr = (struct claw_privbk *) dev->priv;
+ if (!privptr)
+ return 0;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"release");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable dev =\n",dev->name);
+ dumpit((char *) dev, sizeof(struct net_device));
+ printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
+ printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
+#endif
+ privptr->release_pend=1;
+ claw_setbit_busy(TB_STOP,dev);
+ for ( i = 1; i >=0 ; i--) {
+ spin_lock_irqsave(
+ get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
+ /* del_timer(&privptr->channel[READ].timer); */
+ privptr->channel[i].claw_state = CLAW_STOP;
+ privptr->channel[i].IO_active = 0;
+ parm = (unsigned long) &privptr->channel[i];
+ if (i == WRITE)
+ claw_purge_skb_queue(
+ &privptr->channel[WRITE].collect_queue);
+ rc = ccw_device_halt (privptr->channel[i].cdev, parm);
+ if (privptr->system_validate_comp==0x00) /* never opened? */
+ init_waitqueue_head(&privptr->channel[i].wait);
+ add_wait_queue(&privptr->channel[i].wait, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(
+ get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
+ schedule();
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&privptr->channel[i].wait, &wait);
+ if (rc != 0) {
+ ccw_check_return_code(privptr->channel[i].cdev, rc);
+ }
+ }
+ if (privptr->pk_skb != NULL) {
+ dev_kfree_skb(privptr->pk_skb);
+ privptr->pk_skb = NULL;
+ }
+ if(privptr->buffs_alloc != 1) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"none2fre");
+ return 0;
+ }
+ CLAW_DBF_TEXT(4,trace,"freebufs");
+ if (privptr->p_buff_ccw != NULL) {
+ free_pages((unsigned long)privptr->p_buff_ccw,
+ (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
+ }
+ CLAW_DBF_TEXT(4,trace,"freeread");
+ if (privptr->p_env->read_size < PAGE_SIZE) {
+ if (privptr->p_buff_read != NULL) {
+ free_pages((unsigned long)privptr->p_buff_read,
+ (int)pages_to_order_of_mag(privptr->p_buff_read_num));
+ }
+ }
+ else {
+ p_buf=privptr->p_read_active_first;
+ while (p_buf!=NULL) {
+ free_pages((unsigned long)p_buf->p_buffer,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_pages_perread ));
+ p_buf=p_buf->next;
+ }
+ }
+ CLAW_DBF_TEXT(4,trace,"freewrit");
+ if (privptr->p_env->write_size < PAGE_SIZE ) {
+ free_pages((unsigned long)privptr->p_buff_write,
+ (int)pages_to_order_of_mag(privptr->p_buff_write_num));
+ }
+ else {
+ p_buf=privptr->p_write_active_first;
+ while (p_buf!=NULL) {
+ free_pages((unsigned long)p_buf->p_buffer,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_pages_perwrite ));
+ p_buf=p_buf->next;
+ }
+ }
+ CLAW_DBF_TEXT(4,trace,"clearptr");
+ privptr->buffs_alloc = 0;
+ privptr->p_buff_ccw=NULL;
+ privptr->p_buff_read=NULL;
+ privptr->p_buff_write=NULL;
+ privptr->system_validate_comp=0;
+ privptr->release_pend=0;
+ /* Remove any writes that were pending and reset all reads */
+ p_this_ccw=privptr->p_read_active_first;
+ while (p_this_ccw!=NULL) {
+ p_this_ccw->header.length=0xffff;
+ p_this_ccw->header.opcode=0xff;
+ p_this_ccw->header.flag=0x00;
+ p_this_ccw=p_this_ccw->next;
+ }
+
+ while (privptr->p_write_active_first!=NULL) {
+ p_this_ccw=privptr->p_write_active_first;
+ p_this_ccw->header.flag=CLAW_PENDING;
+ privptr->p_write_active_first=p_this_ccw->next;
+ p_this_ccw->next=privptr->p_write_free_chain;
+ privptr->p_write_free_chain=p_this_ccw;
+ ++privptr->write_free_count;
+ }
+ privptr->p_write_active_last=NULL;
+ privptr->mtc_logical_link = -1;
+ privptr->mtc_skipping = 1;
+ privptr->mtc_offset=0;
+
+ if (((privptr->channel[READ].last_dstat |
+ privptr->channel[WRITE].last_dstat) &
+ ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
+ printk(KERN_WARNING "%s: channel problems during close - "
+ "read: %02x - write: %02x\n",
+ dev->name,
+ privptr->channel[READ].last_dstat,
+ privptr->channel[WRITE].last_dstat);
+ CLAW_DBF_TEXT(2,trace,"badclose");
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"rlsexit");
+ return 0;
+} /* end of claw_release */
+
+
+
+/*-------------------------------------------------------------------*
+* claw_write_retry *
+* *
+*--------------------------------------------------------------------*/
+
+static void
+claw_write_retry ( struct chbk *p_ch )
+{
+
+ struct net_device *dev=p_ch->ndev;
+
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+ printk(KERN_INFO "claw: variable p_ch =\n");
+ dumpit((char *) p_ch, sizeof(struct chbk));
+#endif
+ CLAW_DBF_TEXT(4,trace,"w_retry");
+ if (p_ch->claw_state == CLAW_STOP) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return;
+ }
+#ifdef DEBUGMSG
+ printk( KERN_INFO "%s:%s state-%02x\n" ,
+ dev->name,
+ __FUNCTION__,
+ p_ch->claw_state);
+#endif
+ claw_strt_out_IO( dev );
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"rtry_xit");
+ return;
+} /* end of claw_write_retry */
+
+
+/*-------------------------------------------------------------------*
+* claw_write_next *
+* *
+*--------------------------------------------------------------------*/
+
+static void
+claw_write_next ( struct chbk * p_ch )
+{
+
+ struct net_device *dev;
+ struct claw_privbk *privptr=NULL;
+ struct sk_buff *pk_skb;
+ int rc;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter \n",p_ch->ndev->name,__FUNCTION__);
+ printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
+ dumpit((char *) p_ch, sizeof(struct chbk));
+#endif
+ CLAW_DBF_TEXT(4,trace,"claw_wrt");
+ if (p_ch->claw_state == CLAW_STOP)
+ return;
+ dev = (struct net_device *) p_ch->ndev;
+ privptr = (struct claw_privbk *) dev->priv;
+ claw_free_wrt_buf( dev );
+ if ((privptr->write_free_count > 0) &&
+ (skb_queue_len(&p_ch->collect_queue) > 0)) {
+ pk_skb = claw_pack_skb(privptr);
+ while (pk_skb != NULL) {
+ rc = claw_hw_tx( pk_skb, dev,1);
+ if (privptr->write_free_count > 0) {
+ pk_skb = claw_pack_skb(privptr);
+ } else
+ pk_skb = NULL;
+ }
+ }
+ if (privptr->p_write_active_first!=NULL) {
+ claw_strt_out_IO(dev);
+ }
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return;
+} /* end of claw_write_next */
+
+/*-------------------------------------------------------------------*
+* *
+* claw_timer *
+*--------------------------------------------------------------------*/
+
+static void
+claw_timer ( struct chbk * p_ch )
+{
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
+ printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
+ dumpit((char *) p_ch, sizeof(struct chbk));
+#endif
+ CLAW_DBF_TEXT(4,trace,"timer");
+ p_ch->flag |= CLAW_TIMER;
+ wake_up(&p_ch->wait);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ p_ch->ndev->name,__FUNCTION__,__LINE__);
+#endif
+ return;
+} /* end of claw_timer */
+
+
+/*
+*
+* functions
+*/
+
+
+/*-------------------------------------------------------------------*
+* *
+* pages_to_order_of_mag *
+* *
+* takes a number of pages from 1 to 512 and returns the *
+* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
+* of magnitude get_free_pages() has an upper order of 9 *
+*--------------------------------------------------------------------*/
+
+static int inline
+pages_to_order_of_mag(int num_of_pages)
+{
+ int order_of_mag=1; /* assume 2 pages */
+ int nump=2;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
+#endif
+ CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
+ if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
+ /* 512 pages = 2Meg on 4k page systems */
+ if (num_of_pages >= 512) {return 9; }
+ /* we have two or more pages order is at least 1 */
+ for (nump=2 ;nump <= 512;nump*=2) {
+ if (num_of_pages <= nump)
+ break;
+ order_of_mag +=1;
+ }
+ if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s Exit on line %d, order = %d\n",
+ __FUNCTION__,__LINE__, order_of_mag);
+#endif
+ CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
+ return order_of_mag;
+}
+
+/*-------------------------------------------------------------------*
+* *
+* add_claw_reads *
+* *
+*--------------------------------------------------------------------*/
+static int
+add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
+ struct ccwbk* p_last)
+{
+ struct claw_privbk *privptr;
+ struct ccw1 temp_ccw;
+ struct endccw * p_end;
+#ifdef IOTRACE
+ struct ccwbk* p_buf;
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
+#endif
+#ifdef DEBUGMSG
+ printk(KERN_INFO "dev\n");
+ dumpit((char *) dev, sizeof(struct net_device));
+ printk(KERN_INFO "p_first\n");
+ dumpit((char *) p_first, sizeof(struct ccwbk));
+ printk(KERN_INFO "p_last\n");
+ dumpit((char *) p_last, sizeof(struct ccwbk));
+#endif
+ CLAW_DBF_TEXT(4,trace,"addreads");
+ privptr = dev->priv;
+ p_end = privptr->p_end_ccw;
+
+ /* first CCW and last CCW contains a new set of read channel programs
+ * to apend the running channel programs
+ */
+ if ( p_first==NULL) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"addexit");
+ return 0;
+ }
+
+ /* set up ending CCW sequence for this segment */
+ if (p_end->read1) {
+ p_end->read1=0x00; /* second ending CCW is now active */
+ /* reset ending CCWs and setup TIC CCWs */
+ p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+ p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+ p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
+ p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
+ p_end->read2_nop2.cda=0;
+ p_end->read2_nop2.count=1;
+ }
+ else {
+ p_end->read1=0x01; /* first ending CCW is now active */
+ /* reset ending CCWs and setup TIC CCWs */
+ p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+ p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+ p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
+ p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
+ p_end->read1_nop2.cda=0;
+ p_end->read1_nop2.count=1;
+ }
+
+ if ( privptr-> p_read_active_first ==NULL ) {
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s p_read_active_frist == NULL \n",
+ dev->name,__FUNCTION__);
+ printk(KERN_INFO "%s:%s Read active first/last changed \n",
+ dev->name,__FUNCTION__);
+#endif
+ privptr-> p_read_active_first= p_first; /* set new first */
+ privptr-> p_read_active_last = p_last; /* set new last */
+ }
+ else {
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s Read in progress \n",
+ dev->name,__FUNCTION__);
+#endif
+ /* set up TIC ccw */
+ temp_ccw.cda= (__u32)__pa(&p_first->read);
+ temp_ccw.count=0;
+ temp_ccw.flags=0;
+ temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
+
+
+ if (p_end->read1) {
+
+ /* first set of CCW's is chained to the new read */
+ /* chain, so the second set is chained to the active chain. */
+ /* Therefore modify the second set to point to the new */
+ /* read chain set up TIC CCWs */
+ /* make sure we update the CCW so channel doesn't fetch it */
+ /* when it's only half done */
+ memcpy( &p_end->read2_nop2, &temp_ccw ,
+ sizeof(struct ccw1));
+ privptr->p_read_active_last->r_TIC_1.cda=
+ (__u32)__pa(&p_first->read);
+ privptr->p_read_active_last->r_TIC_2.cda=
+ (__u32)__pa(&p_first->read);
+ }
+ else {
+ /* make sure we update the CCW so channel doesn't */
+ /* fetch it when it is only half done */
+ memcpy( &p_end->read1_nop2, &temp_ccw ,
+ sizeof(struct ccw1));
+ privptr->p_read_active_last->r_TIC_1.cda=
+ (__u32)__pa(&p_first->read);
+ privptr->p_read_active_last->r_TIC_2.cda=
+ (__u32)__pa(&p_first->read);
+ }
+ /* chain in new set of blocks */
+ privptr->p_read_active_last->next = p_first;
+ privptr->p_read_active_last=p_last;
+ } /* end of if ( privptr-> p_read_active_first ==NULL) */
+#ifdef IOTRACE
+ printk(KERN_INFO "%s:%s dump p_last CCW BK \n",dev->name,__FUNCTION__);
+ dumpit((char *)p_last, sizeof(struct ccwbk));
+ printk(KERN_INFO "%s:%s dump p_end CCW BK \n",dev->name,__FUNCTION__);
+ dumpit((char *)p_end, sizeof(struct endccw));
+
+ printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
+ dumpit((char *)p_first, sizeof(struct ccwbk));
+ printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
+ dev->name,__FUNCTION__);
+ p_buf=privptr->p_read_active_first;
+ while (p_buf!=NULL) {
+ dumpit((char *)p_buf, sizeof(struct ccwbk));
+ p_buf=p_buf->next;
+ }
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"addexit");
+ return 0;
+} /* end of add_claw_reads */
+
+/*-------------------------------------------------------------------*
+ * ccw_check_return_code *
+ * *
+ *-------------------------------------------------------------------*/
+
+static void inline
+ccw_check_return_code(struct ccw_device *cdev, int return_code)
+{
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > enter \n",
+ cdev->dev.bus_id,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"ccwret");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "variable cdev =\n");
+ dumpit((char *) cdev, sizeof(struct ccw_device));
+ printk(KERN_INFO "variable return_code = %d\n",return_code);
+#endif
+ if (return_code != 0) {
+ switch (return_code) {
+ case -EBUSY:
+ printk(KERN_INFO "%s: Busy !\n",
+ cdev->dev.bus_id);
+ break;
+ case -ENODEV:
+ printk(KERN_EMERG "%s: Missing device called "
+ "for IO ENODEV\n", cdev->dev.bus_id);
+ break;
+ case -EIO:
+ printk(KERN_EMERG "%s: Status pending... EIO \n",
+ cdev->dev.bus_id);
+ break;
+ case -EINVAL:
+ printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
+ cdev->dev.bus_id);
+ break;
+ default:
+ printk(KERN_EMERG "%s: Unknown error in "
+ "Do_IO %d\n",cdev->dev.bus_id, return_code);
+ }
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > exit on line %d\n",
+ cdev->dev.bus_id,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"ccwret");
+} /* end of ccw_check_return_code */
+
+/*-------------------------------------------------------------------*
+* ccw_check_unit_check *
+*--------------------------------------------------------------------*/
+
+static void inline
+ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
+{
+ struct net_device *dev = p_ch->ndev;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
+#endif
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable dev =\n",dev->name);
+ dumpit((char *)dev, sizeof(struct net_device));
+ printk(KERN_INFO "%s: variable sense =\n",dev->name);
+ dumpit((char *)&sense, 2);
+#endif
+ CLAW_DBF_TEXT(4,trace,"unitchek");
+
+ printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
+ dev->name, sense);
+
+ if (sense & 0x40) {
+ if (sense & 0x01) {
+ printk(KERN_WARNING "%s: Interface disconnect or "
+ "Selective reset "
+ "occurred (remote side)\n", dev->name);
+ }
+ else {
+ printk(KERN_WARNING "%s: System reset occured"
+ " (remote side)\n", dev->name);
+ }
+ }
+ else if (sense & 0x20) {
+ if (sense & 0x04) {
+ printk(KERN_WARNING "%s: Data-streaming "
+ "timeout)\n", dev->name);
+ }
+ else {
+ printk(KERN_WARNING "%s: Data-transfer parity"
+ " error\n", dev->name);
+ }
+ }
+ else if (sense & 0x10) {
+ if (sense & 0x20) {
+ printk(KERN_WARNING "%s: Hardware malfunction "
+ "(remote side)\n", dev->name);
+ }
+ else {
+ printk(KERN_WARNING "%s: read-data parity error "
+ "(remote side)\n", dev->name);
+ }
+ }
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+} /* end of ccw_check_unit_check */
+
+
+
+/*-------------------------------------------------------------------*
+* Dump buffer format *
+* *
+*--------------------------------------------------------------------*/
+#ifdef DEBUG
+static void
+dumpit(char* buf, int len)
+{
+
+ __u32 ct, sw, rm, dup;
+ char *ptr, *rptr;
+ char tbuf[82], tdup[82];
+#if (CONFIG_ARCH_S390X)
+ char addr[22];
+#else
+ char addr[12];
+#endif
+ char boff[12];
+ char bhex[82], duphex[82];
+ char basc[40];
+
+ sw = 0;
+ rptr =ptr=buf;
+ rm = 16;
+ duphex[0] = 0x00;
+ dup = 0;
+ for ( ct=0; ct < len; ct++, ptr++, rptr++ ) {
+ if (sw == 0) {
+#if (CONFIG_ARCH_S390X)
+ sprintf(addr, "%16.16lX",(unsigned long)rptr);
+#else
+ sprintf(addr, "%8.8X",(__u32)rptr);
+#endif
+ sprintf(boff, "%4.4X", (__u32)ct);
+ bhex[0] = '\0';
+ basc[0] = '\0';
+ }
+ if ((sw == 4) || (sw == 12)) {
+ strcat(bhex, " ");
+ }
+ if (sw == 8) {
+ strcat(bhex, " ");
+ }
+#if (CONFIG_ARCH_S390X)
+ sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
+#else
+ sprintf(tbuf,"%2.2X", (__u32)*ptr);
+#endif
+ tbuf[2] = '\0';
+ strcat(bhex, tbuf);
+ if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
+ basc[sw] = *ptr;
+ }
+ else {
+ basc[sw] = '.';
+ }
+ basc[sw+1] = '\0';
+ sw++;
+ rm--;
+ if (sw==16) {
+ if ((strcmp(duphex, bhex)) !=0) {
+ if (dup !=0) {
+ sprintf(tdup,"Duplicate as above to"
+ " %s", addr);
+ printk( KERN_INFO " "
+ " --- %s ---\n",tdup);
+ }
+ printk( KERN_INFO " %s (+%s) : %s [%s]\n",
+ addr, boff, bhex, basc);
+ dup = 0;
+ strcpy(duphex, bhex);
+ }
+ else {
+ dup++;
+ }
+ sw = 0;
+ rm = 16;
+ }
+ } /* endfor */
+
+ if (sw != 0) {
+ for ( ; rm > 0; rm--, sw++ ) {
+ if ((sw==4) || (sw==12)) strcat(bhex, " ");
+ if (sw==8) strcat(bhex, " ");
+ strcat(bhex, " ");
+ strcat(basc, " ");
+ }
+ if (dup !=0) {
+ sprintf(tdup,"Duplicate as above to %s", addr);
+ printk( KERN_INFO " --- %s ---\n",
+ tdup);
+ }
+ printk( KERN_INFO " %s (+%s) : %s [%s]\n",
+ addr, boff, bhex, basc);
+ }
+ else {
+ if (dup >=1) {
+ sprintf(tdup,"Duplicate as above to %s", addr);
+ printk( KERN_INFO " --- %s ---\n",
+ tdup);
+ }
+ if (dup !=0) {
+ printk( KERN_INFO " %s (+%s) : %s [%s]\n",
+ addr, boff, bhex, basc);
+ }
+ }
+ return;
+
+} /* end of dumpit */
+#endif
+
+/*-------------------------------------------------------------------*
+* find_link *
+*--------------------------------------------------------------------*/
+static int
+find_link(struct net_device *dev, char *host_name, char *ws_name )
+{
+ struct claw_privbk *privptr;
+ struct claw_env *p_env;
+ int rc=0;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"findlink");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable dev = \n",dev->name);
+ dumpit((char *) dev, sizeof(struct net_device));
+ printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
+ printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
+#endif
+ privptr=dev->priv;
+ p_env=privptr->p_env;
+ switch (p_env->packing)
+ {
+ case PACKING_ASK:
+ if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
+ (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
+ rc = EINVAL;
+ break;
+ case DO_PACKED:
+ case PACK_SEND:
+ if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
+ (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
+ rc = EINVAL;
+ break;
+ default:
+ if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
+ (memcmp(p_env->api_type , ws_name, 8)!=0))
+ rc = EINVAL;
+ break;
+ }
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return 0;
+} /* end of find_link */
+
+/*-------------------------------------------------------------------*
+ * claw_hw_tx *
+ * *
+ * *
+ *-------------------------------------------------------------------*/
+
+static int
+claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
+{
+ int rc=0;
+ struct claw_privbk *privptr;
+ struct ccwbk *p_this_ccw;
+ struct ccwbk *p_first_ccw;
+ struct ccwbk *p_last_ccw;
+ __u32 numBuffers;
+ signed long len_of_data;
+ unsigned long bytesInThisBuffer;
+ unsigned char *pDataAddress;
+ struct endccw *pEnd;
+ struct ccw1 tempCCW;
+ struct chbk *p_ch;
+ struct claw_env *p_env;
+ int lock;
+ struct clawph *pk_head;
+ struct chbk *ch;
+#ifdef IOTRACE
+ struct ccwbk *p_buf;
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"hw_tx");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
+ dumpit((char *) skb, sizeof(struct sk_buff));
+ printk(KERN_INFO "%s: variable dev =\n",dev->name);
+ dumpit((char *) dev, sizeof(struct net_device));
+ printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
+#endif
+ privptr = (struct claw_privbk *) (dev->priv);
+ p_ch=(struct chbk *)&privptr->channel[WRITE];
+ p_env =privptr->p_env;
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: %s() dump sk_buff \n",dev->name,__FUNCTION__);
+ dumpit((char *)skb ,sizeof(struct sk_buff));
+#endif
+ claw_free_wrt_buf(dev); /* Clean up free chain if posible */
+ /* scan the write queue to free any completed write packets */
+ p_first_ccw=NULL;
+ p_last_ccw=NULL;
+ if ((p_env->packing >= PACK_SEND) &&
+ (skb->cb[1] != 'P')) {
+ skb_push(skb,sizeof(struct clawph));
+ pk_head=(struct clawph *)skb->data;
+ pk_head->len=skb->len-sizeof(struct clawph);
+ if (pk_head->len%4) {
+ pk_head->len+= 4-(pk_head->len%4);
+ skb_pad(skb,4-(pk_head->len%4));
+ skb_put(skb,4-(pk_head->len%4));
+ }
+ if (p_env->packing == DO_PACKED)
+ pk_head->link_num = linkid;
+ else
+ pk_head->link_num = 0;
+ pk_head->flag = 0x00;
+ skb_pad(skb,4);
+ skb->cb[1] = 'P';
+ }
+ if (linkid == 0) {
+ if (claw_check_busy(dev)) {
+ if (privptr->write_free_count!=0) {
+ claw_clear_busy(dev);
+ }
+ else {
+ claw_strt_out_IO(dev );
+ claw_free_wrt_buf( dev );
+ if (privptr->write_free_count==0) {
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: "
+ "(claw_check_busy) no free write "
+ "buffers\n", dev->name);
+#endif
+ ch = &privptr->channel[WRITE];
+ atomic_inc(&skb->users);
+ skb_queue_tail(&ch->collect_queue, skb);
+ goto Done;
+ }
+ else {
+ claw_clear_busy(dev);
+ }
+ }
+ }
+ /* tx lock */
+ if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: busy (claw_test_and_setbit_"
+ "busy)\n", dev->name);
+#endif
+ ch = &privptr->channel[WRITE];
+ atomic_inc(&skb->users);
+ skb_queue_tail(&ch->collect_queue, skb);
+ claw_strt_out_IO(dev );
+ rc=-EBUSY;
+ goto Done2;
+ }
+ }
+ /* See how many write buffers are required to hold this data */
+ numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
+ ( privptr->p_env->write_size);
+
+ /* If that number of buffers isn't available, give up for now */
+ if (privptr->write_free_count < numBuffers ||
+ privptr->p_write_free_chain == NULL ) {
+
+ claw_setbit_busy(TB_NOBUFFER,dev);
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: busy (claw_setbit_busy"
+ "(TB_NOBUFFER))\n", dev->name);
+ printk(KERN_INFO " free_count: %d, numBuffers : %d\n",
+ (int)privptr->write_free_count,(int) numBuffers );
+#endif
+ ch = &privptr->channel[WRITE];
+ atomic_inc(&skb->users);
+ skb_queue_tail(&ch->collect_queue, skb);
+ CLAW_DBF_TEXT(2,trace,"clawbusy");
+ goto Done2;
+ }
+ pDataAddress=skb->data;
+ len_of_data=skb->len;
+
+ while (len_of_data > 0) {
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
+ dev->name ,__FUNCTION__,len_of_data);
+ dumpit((char *)pDataAddress ,64);
+#endif
+ p_this_ccw=privptr->p_write_free_chain; /* get a block */
+ if (p_this_ccw == NULL) { /* lost the race */
+ ch = &privptr->channel[WRITE];
+ atomic_inc(&skb->users);
+ skb_queue_tail(&ch->collect_queue, skb);
+ goto Done2;
+ }
+ privptr->p_write_free_chain=p_this_ccw->next;
+ p_this_ccw->next=NULL;
+ --privptr->write_free_count; /* -1 */
+ bytesInThisBuffer=len_of_data;
+ memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
+ len_of_data-=bytesInThisBuffer;
+ pDataAddress+=(unsigned long)bytesInThisBuffer;
+ /* setup write CCW */
+ p_this_ccw->write.cmd_code = (linkid * 8) +1;
+ if (len_of_data>0) {
+ p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
+ }
+ p_this_ccw->write.count=bytesInThisBuffer;
+ /* now add to end of this chain */
+ if (p_first_ccw==NULL) {
+ p_first_ccw=p_this_ccw;
+ }
+ if (p_last_ccw!=NULL) {
+ p_last_ccw->next=p_this_ccw;
+ /* set up TIC ccws */
+ p_last_ccw->w_TIC_1.cda=
+ (__u32)__pa(&p_this_ccw->write);
+ }
+ p_last_ccw=p_this_ccw; /* save new last block */
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
+ dev->name,__FUNCTION__,bytesInThisBuffer);
+ dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
+ dumpit((char *)p_this_ccw->p_buffer, 64);
+#endif
+ }
+
+ /* FirstCCW and LastCCW now contain a new set of write channel
+ * programs to append to the running channel program
+ */
+
+ if (p_first_ccw!=NULL) {
+ /* setup ending ccw sequence for this segment */
+ pEnd=privptr->p_end_ccw;
+ if (pEnd->write1) {
+ pEnd->write1=0x00; /* second end ccw is now active */
+ /* set up Tic CCWs */
+ p_last_ccw->w_TIC_1.cda=
+ (__u32)__pa(&pEnd->write2_nop1);
+ pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+ pEnd->write2_nop2.flags =
+ CCW_FLAG_SLI | CCW_FLAG_SKIP;
+ pEnd->write2_nop2.cda=0;
+ pEnd->write2_nop2.count=1;
+ }
+ else { /* end of if (pEnd->write1)*/
+ pEnd->write1=0x01; /* first end ccw is now active */
+ /* set up Tic CCWs */
+ p_last_ccw->w_TIC_1.cda=
+ (__u32)__pa(&pEnd->write1_nop1);
+ pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+ pEnd->write1_nop2.flags =
+ CCW_FLAG_SLI | CCW_FLAG_SKIP;
+ pEnd->write1_nop2.cda=0;
+ pEnd->write1_nop2.count=1;
+ } /* end if if (pEnd->write1) */
+
+
+ if (privptr->p_write_active_first==NULL ) {
+ privptr->p_write_active_first=p_first_ccw;
+ privptr->p_write_active_last=p_last_ccw;
+ }
+ else {
+
+ /* set up Tic CCWs */
+
+ tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
+ tempCCW.count=0;
+ tempCCW.flags=0;
+ tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
+
+ if (pEnd->write1) {
+
+ /*
+ * first set of ending CCW's is chained to the new write
+ * chain, so the second set is chained to the active chain
+ * Therefore modify the second set to point the new write chain.
+ * make sure we update the CCW atomically
+ * so channel does not fetch it when it's only half done
+ */
+ memcpy( &pEnd->write2_nop2, &tempCCW ,
+ sizeof(struct ccw1));
+ privptr->p_write_active_last->w_TIC_1.cda=
+ (__u32)__pa(&p_first_ccw->write);
+ }
+ else {
+
+ /*make sure we update the CCW atomically
+ *so channel does not fetch it when it's only half done
+ */
+ memcpy(&pEnd->write1_nop2, &tempCCW ,
+ sizeof(struct ccw1));
+ privptr->p_write_active_last->w_TIC_1.cda=
+ (__u32)__pa(&p_first_ccw->write);
+
+ } /* end if if (pEnd->write1) */
+
+ privptr->p_write_active_last->next=p_first_ccw;
+ privptr->p_write_active_last=p_last_ccw;
+ }
+
+ } /* endif (p_first_ccw!=NULL) */
+
+
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: %s() > Dump Active CCW chain \n",
+ dev->name,__FUNCTION__);
+ p_buf=privptr->p_write_active_first;
+ while (p_buf!=NULL) {
+ dumpit((char *)p_buf, sizeof(struct ccwbk));
+ p_buf=p_buf->next;
+ }
+ p_buf=(struct ccwbk*)privptr->p_end_ccw;
+ dumpit((char *)p_buf, sizeof(struct endccw));
+#endif
+ dev_kfree_skb(skb);
+ if (linkid==0) {
+ lock=LOCK_NO;
+ }
+ else {
+ lock=LOCK_YES;
+ }
+ claw_strt_out_IO(dev );
+ /* if write free count is zero , set NOBUFFER */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() > free_count is %d\n",
+ dev->name,__FUNCTION__,
+ (int) privptr->write_free_count );
+#endif
+ if (privptr->write_free_count==0) {
+ claw_setbit_busy(TB_NOBUFFER,dev);
+ }
+Done2:
+ claw_clearbit_busy(TB_TX,dev);
+Done:
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
+ dev->name,__FUNCTION__,__LINE__, rc);
+#endif
+ return(rc);
+} /* end of claw_hw_tx */
+
+/*-------------------------------------------------------------------*
+* *
+* init_ccw_bk *
+* *
+*--------------------------------------------------------------------*/
+
+static int
+init_ccw_bk(struct net_device *dev)
+{
+
+ __u32 ccw_blocks_required;
+ __u32 ccw_blocks_perpage;
+ __u32 ccw_pages_required;
+ __u32 claw_reads_perpage=1;
+ __u32 claw_read_pages;
+ __u32 claw_writes_perpage=1;
+ __u32 claw_write_pages;
+ void *p_buff=NULL;
+ struct ccwbk*p_free_chain;
+ struct ccwbk*p_buf;
+ struct ccwbk*p_last_CCWB;
+ struct ccwbk*p_first_CCWB;
+ struct endccw *p_endccw=NULL;
+ addr_t real_address;
+ struct claw_privbk *privptr=dev->priv;
+ struct clawh *pClawH=NULL;
+ addr_t real_TIC_address;
+ int i,j;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() enter \n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"init_ccw");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable dev =\n",dev->name);
+ dumpit((char *) dev, sizeof(struct net_device));
+#endif
+
+ /* initialize statistics field */
+ privptr->active_link_ID=0;
+ /* initialize ccwbk pointers */
+ privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
+ privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
+ privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
+ privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
+ privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
+ privptr->p_end_ccw=NULL; /* pointer to ending ccw */
+ privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
+ privptr->buffs_alloc = 0;
+ memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
+ memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
+ /* initialize free write ccwbk counter */
+ privptr->write_free_count=0; /* number of free bufs on write chain */
+ p_last_CCWB = NULL;
+ p_first_CCWB= NULL;
+ /*
+ * We need 1 CCW block for each read buffer, 1 for each
+ * write buffer, plus 1 for ClawSignalBlock
+ */
+ ccw_blocks_required =
+ privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() "
+ "ccw_blocks_required=%d\n",
+ dev->name,__FUNCTION__,
+ ccw_blocks_required);
+ printk(KERN_INFO "%s: %s() "
+ "PAGE_SIZE=0x%x\n",
+ dev->name,__FUNCTION__,
+ (unsigned int)PAGE_SIZE);
+ printk(KERN_INFO "%s: %s() > "
+ "PAGE_MASK=0x%x\n",
+ dev->name,__FUNCTION__,
+ (unsigned int)PAGE_MASK);
+#endif
+ /*
+ * compute number of CCW blocks that will fit in a page
+ */
+ ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
+ ccw_pages_required=
+ (ccw_blocks_required+ccw_blocks_perpage -1) /
+ ccw_blocks_perpage;
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
+ dev->name,__FUNCTION__,
+ ccw_blocks_perpage);
+ printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
+ dev->name,__FUNCTION__,
+ ccw_pages_required);
+#endif
+ /*
+ * read and write sizes are set by 2 constants in claw.h
+ * 4k and 32k. Unpacked values other than 4k are not going to
+ * provide good performance. With packing buffers support 32k
+ * buffers are used.
+ */
+ if (privptr->p_env->read_size < PAGE_SIZE) {
+ claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
+ claw_read_pages= (privptr->p_env->read_buffers +
+ claw_reads_perpage -1) / claw_reads_perpage;
+ }
+ else { /* > or equal */
+ privptr->p_buff_pages_perread=
+ (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
+ claw_read_pages=
+ privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
+ }
+ if (privptr->p_env->write_size < PAGE_SIZE) {
+ claw_writes_perpage=
+ PAGE_SIZE / privptr->p_env->write_size;
+ claw_write_pages=
+ (privptr->p_env->write_buffers + claw_writes_perpage -1) /
+ claw_writes_perpage;
+
+ }
+ else { /* > or equal */
+ privptr->p_buff_pages_perwrite=
+ (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
+ claw_write_pages=
+ privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
+ }
+#ifdef DEBUGMSG
+ if (privptr->p_env->read_size < PAGE_SIZE) {
+ printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
+ dev->name,__FUNCTION__,
+ claw_reads_perpage);
+ }
+ else {
+ printk(KERN_INFO "%s: %s() pages_perread=%d\n",
+ dev->name,__FUNCTION__,
+ privptr->p_buff_pages_perread);
+ }
+ printk(KERN_INFO "%s: %s() read_pages=%d\n",
+ dev->name,__FUNCTION__,
+ claw_read_pages);
+ if (privptr->p_env->write_size < PAGE_SIZE) {
+ printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
+ dev->name,__FUNCTION__,
+ claw_writes_perpage);
+ }
+ else {
+ printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
+ dev->name,__FUNCTION__,
+ privptr->p_buff_pages_perwrite);
+ }
+ printk(KERN_INFO "%s: %s() write_pages=%d\n",
+ dev->name,__FUNCTION__,
+ claw_write_pages);
+#endif
+
+
+ /*
+ * allocate ccw_pages_required
+ */
+ if (privptr->p_buff_ccw==NULL) {
+ privptr->p_buff_ccw=
+ (void *)__get_free_pages(__GFP_DMA,
+ (int)pages_to_order_of_mag(ccw_pages_required ));
+ if (privptr->p_buff_ccw==NULL) {
+ printk(KERN_INFO "%s: %s() "
+ "__get_free_pages for CCWs failed : "
+ "pages is %d\n",
+ dev->name,__FUNCTION__,
+ ccw_pages_required );
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > "
+ "exit on line %d, rc = ENOMEM\n",
+ dev->name,__FUNCTION__,
+ __LINE__);
+#endif
+ return -ENOMEM;
+ }
+ privptr->p_buff_ccw_num=ccw_pages_required;
+ }
+ memset(privptr->p_buff_ccw, 0x00,
+ privptr->p_buff_ccw_num * PAGE_SIZE);
+
+ /*
+ * obtain ending ccw block address
+ *
+ */
+ privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
+ real_address = (__u32)__pa(privptr->p_end_ccw);
+ /* Initialize ending CCW block */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
+ dev->name,__FUNCTION__);
+#endif
+
+ p_endccw=privptr->p_end_ccw;
+ p_endccw->real=real_address;
+ p_endccw->write1=0x00;
+ p_endccw->read1=0x00;
+
+ /* write1_nop1 */
+ p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
+ p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_endccw->write1_nop1.count = 1;
+ p_endccw->write1_nop1.cda = 0;
+
+ /* write1_nop2 */
+ p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+ p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+ p_endccw->write1_nop2.count = 1;
+ p_endccw->write1_nop2.cda = 0;
+
+ /* write2_nop1 */
+ p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
+ p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_endccw->write2_nop1.count = 1;
+ p_endccw->write2_nop1.cda = 0;
+
+ /* write2_nop2 */
+ p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+ p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+ p_endccw->write2_nop2.count = 1;
+ p_endccw->write2_nop2.cda = 0;
+
+ /* read1_nop1 */
+ p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
+ p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_endccw->read1_nop1.count = 1;
+ p_endccw->read1_nop1.cda = 0;
+
+ /* read1_nop2 */
+ p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+ p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+ p_endccw->read1_nop2.count = 1;
+ p_endccw->read1_nop2.cda = 0;
+
+ /* read2_nop1 */
+ p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
+ p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_endccw->read2_nop1.count = 1;
+ p_endccw->read2_nop1.cda = 0;
+
+ /* read2_nop2 */
+ p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
+ p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
+ p_endccw->read2_nop2.count = 1;
+ p_endccw->read2_nop2.cda = 0;
+
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
+ dev->name,__FUNCTION__);
+ dumpit((char *)p_endccw, sizeof(struct endccw));
+#endif
+
+ /*
+ * Build a chain of CCWs
+ *
+ */
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() Begin build a chain of CCW buffer \n",
+ dev->name,__FUNCTION__);
+#endif
+ p_buff=privptr->p_buff_ccw;
+
+ p_free_chain=NULL;
+ for (i=0 ; i < ccw_pages_required; i++ ) {
+ real_address = (__u32)__pa(p_buff);
+ p_buf=p_buff;
+ for (j=0 ; j < ccw_blocks_perpage ; j++) {
+ p_buf->next = p_free_chain;
+ p_free_chain = p_buf;
+ p_buf->real=(__u32)__pa(p_buf);
+ ++p_buf;
+ }
+ p_buff+=PAGE_SIZE;
+ }
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() "
+ "End build a chain of CCW buffer \n",
+ dev->name,__FUNCTION__);
+ p_buf=p_free_chain;
+ while (p_buf!=NULL) {
+ dumpit((char *)p_buf, sizeof(struct ccwbk));
+ p_buf=p_buf->next;
+ }
+#endif
+
+ /*
+ * Initialize ClawSignalBlock
+ *
+ */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() "
+ "Begin initialize ClawSignalBlock \n",
+ dev->name,__FUNCTION__);
+#endif
+ if (privptr->p_claw_signal_blk==NULL) {
+ privptr->p_claw_signal_blk=p_free_chain;
+ p_free_chain=p_free_chain->next;
+ pClawH=(struct clawh *)privptr->p_claw_signal_blk;
+ pClawH->length=0xffff;
+ pClawH->opcode=0xff;
+ pClawH->flag=CLAW_BUSY;
+ }
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() > End initialize "
+ "ClawSignalBlock\n",
+ dev->name,__FUNCTION__);
+ dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
+#endif
+
+ /*
+ * allocate write_pages_required and add to free chain
+ */
+ if (privptr->p_buff_write==NULL) {
+ if (privptr->p_env->write_size < PAGE_SIZE) {
+ privptr->p_buff_write=
+ (void *)__get_free_pages(__GFP_DMA,
+ (int)pages_to_order_of_mag(claw_write_pages ));
+ if (privptr->p_buff_write==NULL) {
+ printk(KERN_INFO "%s: %s() __get_free_pages for write"
+ " bufs failed : get is for %d pages\n",
+ dev->name,__FUNCTION__,claw_write_pages );
+ free_pages((unsigned long)privptr->p_buff_ccw,
+ (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
+ privptr->p_buff_ccw=NULL;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > exit on line %d,"
+ "rc = ENOMEM\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return -ENOMEM;
+ }
+ /*
+ * Build CLAW write free chain
+ *
+ */
+
+ memset(privptr->p_buff_write, 0x00,
+ ccw_pages_required * PAGE_SIZE);
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() Begin build claw write free "
+ "chain \n",dev->name,__FUNCTION__);
+#endif
+ privptr->p_write_free_chain=NULL;
+
+ p_buff=privptr->p_buff_write;
+
+ for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
+ p_buf = p_free_chain; /* get a CCW */
+ p_free_chain = p_buf->next;
+ p_buf->next =privptr->p_write_free_chain;
+ privptr->p_write_free_chain = p_buf;
+ p_buf-> p_buffer = (struct clawbuf *)p_buff;
+ p_buf-> write.cda = (__u32)__pa(p_buff);
+ p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
+ p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> w_read_FF.count = 1;
+ p_buf-> w_read_FF.cda =
+ (__u32)__pa(&p_buf-> header.flag);
+ p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
+ p_buf-> w_TIC_1.flags = 0;
+ p_buf-> w_TIC_1.count = 0;
+
+ if (((unsigned long)p_buff+privptr->p_env->write_size) >=
+ ((unsigned long)(p_buff+2*
+ (privptr->p_env->write_size) -1) & PAGE_MASK)) {
+ p_buff= p_buff+privptr->p_env->write_size;
+ }
+ }
+ }
+ else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
+ {
+ privptr->p_write_free_chain=NULL;
+ for (i = 0; i< privptr->p_env->write_buffers ; i++) {
+ p_buff=(void *)__get_free_pages(__GFP_DMA,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_pages_perwrite) );
+#ifdef IOTRACE
+ printk(KERN_INFO "%s:%s __get_free_pages "
+ "for writes buf: get for %d pages\n",
+ dev->name,__FUNCTION__,
+ privptr->p_buff_pages_perwrite);
+#endif
+ if (p_buff==NULL) {
+ printk(KERN_INFO "%s:%s __get_free_pages"
+ "for writes buf failed : get is for %d pages\n",
+ dev->name,
+ __FUNCTION__,
+ privptr->p_buff_pages_perwrite );
+ free_pages((unsigned long)privptr->p_buff_ccw,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_ccw_num));
+ privptr->p_buff_ccw=NULL;
+ p_buf=privptr->p_buff_write;
+ while (p_buf!=NULL) {
+ free_pages((unsigned long)
+ p_buf->p_buffer,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_pages_perwrite));
+ p_buf=p_buf->next;
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
+ dev->name,
+ __FUNCTION__,
+ __LINE__);
+#endif
+ return -ENOMEM;
+ } /* Error on get_pages */
+ memset(p_buff, 0x00, privptr->p_env->write_size );
+ p_buf = p_free_chain;
+ p_free_chain = p_buf->next;
+ p_buf->next = privptr->p_write_free_chain;
+ privptr->p_write_free_chain = p_buf;
+ privptr->p_buff_write = p_buf;
+ p_buf->p_buffer=(struct clawbuf *)p_buff;
+ p_buf-> write.cda = (__u32)__pa(p_buff);
+ p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
+ p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> w_read_FF.count = 1;
+ p_buf-> w_read_FF.cda =
+ (__u32)__pa(&p_buf-> header.flag);
+ p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
+ p_buf-> w_TIC_1.flags = 0;
+ p_buf-> w_TIC_1.count = 0;
+ } /* for all write_buffers */
+
+ } /* else buffers are PAGE_SIZE or bigger */
+
+ }
+ privptr->p_buff_write_num=claw_write_pages;
+ privptr->write_free_count=privptr->p_env->write_buffers;
+
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s End build claw write free chain \n",
+ dev->name,__FUNCTION__);
+ p_buf=privptr->p_write_free_chain;
+ while (p_buf!=NULL) {
+ dumpit((char *)p_buf, sizeof(struct ccwbk));
+ p_buf=p_buf->next;
+ }
+#endif
+ /*
+ * allocate read_pages_required and chain to free chain
+ */
+ if (privptr->p_buff_read==NULL) {
+ if (privptr->p_env->read_size < PAGE_SIZE) {
+ privptr->p_buff_read=
+ (void *)__get_free_pages(__GFP_DMA,
+ (int)pages_to_order_of_mag(claw_read_pages) );
+ if (privptr->p_buff_read==NULL) {
+ printk(KERN_INFO "%s: %s() "
+ "__get_free_pages for read buf failed : "
+ "get is for %d pages\n",
+ dev->name,__FUNCTION__,claw_read_pages );
+ free_pages((unsigned long)privptr->p_buff_ccw,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_ccw_num));
+ /* free the write pages size is < page size */
+ free_pages((unsigned long)privptr->p_buff_write,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_write_num));
+ privptr->p_buff_ccw=NULL;
+ privptr->p_buff_write=NULL;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
+ " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
+#endif
+ return -ENOMEM;
+ }
+ memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
+ privptr->p_buff_read_num=claw_read_pages;
+ /*
+ * Build CLAW read free chain
+ *
+ */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
+ dev->name,__FUNCTION__);
+#endif
+ p_buff=privptr->p_buff_read;
+ for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
+ p_buf = p_free_chain;
+ p_free_chain = p_buf->next;
+
+ if (p_last_CCWB==NULL) {
+ p_buf->next=NULL;
+ real_TIC_address=0;
+ p_last_CCWB=p_buf;
+ }
+ else {
+ p_buf->next=p_first_CCWB;
+ real_TIC_address=
+ (__u32)__pa(&p_first_CCWB -> read );
+ }
+
+ p_first_CCWB=p_buf;
+
+ p_buf->p_buffer=(struct clawbuf *)p_buff;
+ /* initialize read command */
+ p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
+ p_buf-> read.cda = (__u32)__pa(p_buff);
+ p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> read.count = privptr->p_env->read_size;
+
+ /* initialize read_h command */
+ p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
+ p_buf-> read_h.cda =
+ (__u32)__pa(&(p_buf->header));
+ p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> read_h.count = sizeof(struct clawh);
+
+ /* initialize Signal command */
+ p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
+ p_buf-> signal.cda =
+ (__u32)__pa(&(pClawH->flag));
+ p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> signal.count = 1;
+
+ /* initialize r_TIC_1 command */
+ p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
+ p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
+ p_buf-> r_TIC_1.flags = 0;
+ p_buf-> r_TIC_1.count = 0;
+
+ /* initialize r_read_FF command */
+ p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
+ p_buf-> r_read_FF.cda =
+ (__u32)__pa(&(pClawH->flag));
+ p_buf-> r_read_FF.flags =
+ CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
+ p_buf-> r_read_FF.count = 1;
+
+ /* initialize r_TIC_2 */
+ memcpy(&p_buf->r_TIC_2,
+ &p_buf->r_TIC_1, sizeof(struct ccw1));
+
+ /* initialize Header */
+ p_buf->header.length=0xffff;
+ p_buf->header.opcode=0xff;
+ p_buf->header.flag=CLAW_PENDING;
+
+ if (((unsigned long)p_buff+privptr->p_env->read_size) >=
+ ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
+ & PAGE_MASK) ) {
+ p_buff= p_buff+privptr->p_env->read_size;
+ }
+ else {
+ p_buff=
+ (void *)((unsigned long)
+ (p_buff+2*(privptr->p_env->read_size) -1)
+ & PAGE_MASK) ;
+ }
+ } /* for read_buffers */
+ } /* read_size < PAGE_SIZE */
+ else { /* read Size >= PAGE_SIZE */
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
+ dev->name,__FUNCTION__);
+#endif
+ for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
+ p_buff = (void *)__get_free_pages(__GFP_DMA,
+ (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
+ if (p_buff==NULL) {
+ printk(KERN_INFO "%s: %s() __get_free_pages for read "
+ "buf failed : get is for %d pages\n",
+ dev->name,__FUNCTION__,
+ privptr->p_buff_pages_perread );
+ free_pages((unsigned long)privptr->p_buff_ccw,
+ (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
+ /* free the write pages */
+ p_buf=privptr->p_buff_write;
+ while (p_buf!=NULL) {
+ free_pages((unsigned long)p_buf->p_buffer,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_pages_perwrite ));
+ p_buf=p_buf->next;
+ }
+ /* free any read pages already alloc */
+ p_buf=privptr->p_buff_read;
+ while (p_buf!=NULL) {
+ free_pages((unsigned long)p_buf->p_buffer,
+ (int)pages_to_order_of_mag(
+ privptr->p_buff_pages_perread ));
+ p_buf=p_buf->next;
+ }
+ privptr->p_buff_ccw=NULL;
+ privptr->p_buff_write=NULL;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
+ dev->name,__FUNCTION__,
+ __LINE__);
+#endif
+ return -ENOMEM;
+ }
+ memset(p_buff, 0x00, privptr->p_env->read_size);
+ p_buf = p_free_chain;
+ privptr->p_buff_read = p_buf;
+ p_free_chain = p_buf->next;
+
+ if (p_last_CCWB==NULL) {
+ p_buf->next=NULL;
+ real_TIC_address=0;
+ p_last_CCWB=p_buf;
+ }
+ else {
+ p_buf->next=p_first_CCWB;
+ real_TIC_address=
+ (addr_t)__pa(
+ &p_first_CCWB -> read );
+ }
+
+ p_first_CCWB=p_buf;
+ /* save buff address */
+ p_buf->p_buffer=(struct clawbuf *)p_buff;
+ /* initialize read command */
+ p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
+ p_buf-> read.cda = (__u32)__pa(p_buff);
+ p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> read.count = privptr->p_env->read_size;
+
+ /* initialize read_h command */
+ p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
+ p_buf-> read_h.cda =
+ (__u32)__pa(&(p_buf->header));
+ p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> read_h.count = sizeof(struct clawh);
+
+ /* initialize Signal command */
+ p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
+ p_buf-> signal.cda =
+ (__u32)__pa(&(pClawH->flag));
+ p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
+ p_buf-> signal.count = 1;
+
+ /* initialize r_TIC_1 command */
+ p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
+ p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
+ p_buf-> r_TIC_1.flags = 0;
+ p_buf-> r_TIC_1.count = 0;
+
+ /* initialize r_read_FF command */
+ p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
+ p_buf-> r_read_FF.cda =
+ (__u32)__pa(&(pClawH->flag));
+ p_buf-> r_read_FF.flags =
+ CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
+ p_buf-> r_read_FF.count = 1;
+
+ /* initialize r_TIC_2 */
+ memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
+ sizeof(struct ccw1));
+
+ /* initialize Header */
+ p_buf->header.length=0xffff;
+ p_buf->header.opcode=0xff;
+ p_buf->header.flag=CLAW_PENDING;
+
+ } /* For read_buffers */
+ } /* read_size >= PAGE_SIZE */
+ } /* pBuffread = NULL */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() > End build claw read free chain \n",
+ dev->name,__FUNCTION__);
+ p_buf=p_first_CCWB;
+ while (p_buf!=NULL) {
+ dumpit((char *)p_buf, sizeof(struct ccwbk));
+ p_buf=p_buf->next;
+ }
+
+#endif
+ add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
+ privptr->buffs_alloc = 1;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return 0;
+} /* end of init_ccw_bk */
+
+/*-------------------------------------------------------------------*
+* *
+* probe_error *
+* *
+*--------------------------------------------------------------------*/
+
+static void
+probe_error( struct ccwgroup_device *cgdev)
+{
+ struct claw_privbk *privptr;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s enter \n",__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"proberr");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
+ dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
+#endif
+ privptr=(struct claw_privbk *)cgdev->dev.driver_data;
+ if (privptr!=NULL) {
+ if (privptr->p_env != NULL) {
+ kfree(privptr->p_env);
+ privptr->p_env=NULL;
+ }
+ if (privptr->p_mtc_envelope!=NULL) {
+ kfree(privptr->p_mtc_envelope);
+ privptr->p_mtc_envelope=NULL;
+ }
+ kfree(privptr);
+ privptr=NULL;
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s > exit on line %d\n",
+ __FUNCTION__,__LINE__);
+#endif
+
+ return;
+} /* probe_error */
+
+
+
+/*-------------------------------------------------------------------*
+* claw_process_control *
+* *
+* *
+*--------------------------------------------------------------------*/
+
+static int
+claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
+{
+
+ struct clawbuf *p_buf;
+ struct clawctl ctlbk;
+ struct clawctl *p_ctlbk;
+ char temp_host_name[8];
+ char temp_ws_name[8];
+ struct claw_privbk *privptr;
+ struct claw_env *p_env;
+ struct sysval *p_sysval;
+ struct conncmd *p_connect=NULL;
+ int rc;
+ struct chbk *p_ch = NULL;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > enter \n",
+ dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"clw_cntl");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable dev =\n",dev->name);
+ dumpit((char *) dev, sizeof(struct net_device));
+ printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
+ dumpit((char *) p_ccw, sizeof(struct ccwbk *));
+#endif
+ udelay(1000); /* Wait a ms for the control packets to
+ *catch up to each other */
+ privptr=dev->priv;
+ p_env=privptr->p_env;
+ memcpy( &temp_host_name, p_env->host_name, 8);
+ memcpy( &temp_ws_name, p_env->adapter_name , 8);
+ printk(KERN_INFO "%s: CLAW device %.8s: "
+ "Received Control Packet\n",
+ dev->name, temp_ws_name);
+ if (privptr->release_pend==1) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() > "
+ "exit on line %d, rc=0\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return 0;
+ }
+ p_buf=p_ccw->p_buffer;
+ p_ctlbk=&ctlbk;
+ if (p_env->packing == DO_PACKED) { /* packing in progress?*/
+ memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
+ } else {
+ memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
+ }
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
+ dumpit((char *)p_ctlbk, sizeof(struct clawctl));
+#endif
+ switch (p_ctlbk->command)
+ {
+ case SYSTEM_VALIDATE_REQUEST:
+ if (p_ctlbk->version!=CLAW_VERSION_ID) {
+ claw_snd_sys_validate_rsp(dev, p_ctlbk,
+ CLAW_RC_WRONG_VERSION );
+ printk("%s: %d is wrong version id. "
+ "Expected %d\n",
+ dev->name, p_ctlbk->version,
+ CLAW_VERSION_ID);
+ }
+ p_sysval=(struct sysval *)&(p_ctlbk->data);
+ printk( "%s: Recv Sys Validate Request: "
+ "Vers=%d,link_id=%d,Corr=%d,WS name=%."
+ "8s,Host name=%.8s\n",
+ dev->name, p_ctlbk->version,
+ p_ctlbk->linkid,
+ p_ctlbk->correlator,
+ p_sysval->WS_name,
+ p_sysval->host_name);
+ if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
+ claw_snd_sys_validate_rsp(dev, p_ctlbk,
+ CLAW_RC_NAME_MISMATCH );
+ CLAW_DBF_TEXT(2,setup,"HSTBAD");
+ CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
+ CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
+ printk(KERN_INFO "%s: Host name mismatch\n",
+ dev->name);
+ printk(KERN_INFO "%s: Received :%s: "
+ "expected :%s: \n",
+ dev->name,
+ p_sysval->host_name,
+ temp_host_name);
+ }
+ if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
+ claw_snd_sys_validate_rsp(dev, p_ctlbk,
+ CLAW_RC_NAME_MISMATCH );
+ CLAW_DBF_TEXT(2,setup,"WSNBAD");
+ CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
+ CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
+ printk(KERN_INFO "%s: WS name mismatch\n",
+ dev->name);
+ printk(KERN_INFO "%s: Received :%s: "
+ "expected :%s: \n",
+ dev->name,
+ p_sysval->WS_name,
+ temp_ws_name);
+ }
+ if (( p_sysval->write_frame_size < p_env->write_size) &&
+ ( p_env->packing == 0)) {
+ claw_snd_sys_validate_rsp(dev, p_ctlbk,
+ CLAW_RC_HOST_RCV_TOO_SMALL );
+ printk(KERN_INFO "%s: host write size is too "
+ "small\n", dev->name);
+ CLAW_DBF_TEXT(2,setup,"wrtszbad");
+ }
+ if (( p_sysval->read_frame_size < p_env->read_size) &&
+ ( p_env->packing == 0)) {
+ claw_snd_sys_validate_rsp(dev, p_ctlbk,
+ CLAW_RC_HOST_RCV_TOO_SMALL );
+ printk(KERN_INFO "%s: host read size is too "
+ "small\n", dev->name);
+ CLAW_DBF_TEXT(2,setup,"rdsizbad");
+ }
+ claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
+ printk("%s: CLAW device %.8s: System validate"
+ " completed.\n",dev->name, temp_ws_name);
+ printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
+ p_sysval->read_frame_size,p_sysval->write_frame_size);
+ privptr->system_validate_comp=1;
+ if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
+ p_env->packing = PACKING_ASK;
+ }
+ claw_strt_conn_req(dev);
+ break;
+
+ case SYSTEM_VALIDATE_RESPONSE:
+ p_sysval=(struct sysval *)&(p_ctlbk->data);
+ printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
+ "WS name=%.8s,Host name=%.8s\n",
+ dev->name,
+ p_ctlbk->version,
+ p_ctlbk->correlator,
+ p_ctlbk->rc,
+ p_sysval->WS_name,
+ p_sysval->host_name);
+ switch (p_ctlbk->rc)
+ {
+ case 0:
+ printk(KERN_INFO "%s: CLAW device "
+ "%.8s: System validate "
+ "completed.\n",
+ dev->name, temp_ws_name);
+ if (privptr->system_validate_comp == 0)
+ claw_strt_conn_req(dev);
+ privptr->system_validate_comp=1;
+ break;
+ case CLAW_RC_NAME_MISMATCH:
+ printk(KERN_INFO "%s: Sys Validate "
+ "Resp : Host, WS name is "
+ "mismatch\n",
+ dev->name);
+ break;
+ case CLAW_RC_WRONG_VERSION:
+ printk(KERN_INFO "%s: Sys Validate "
+ "Resp : Wrong version\n",
+ dev->name);
+ break;
+ case CLAW_RC_HOST_RCV_TOO_SMALL:
+ printk(KERN_INFO "%s: Sys Validate "
+ "Resp : bad frame size\n",
+ dev->name);
+ break;
+ default:
+ printk(KERN_INFO "%s: Sys Validate "
+ "error code=%d \n",
+ dev->name, p_ctlbk->rc );
+ break;
+ }
+ break;
+
+ case CONNECTION_REQUEST:
+ p_connect=(struct conncmd *)&(p_ctlbk->data);
+ printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
+ "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
+ dev->name,
+ p_ctlbk->version,
+ p_ctlbk->linkid,
+ p_ctlbk->correlator,
+ p_connect->host_name,
+ p_connect->WS_name);
+ if (privptr->active_link_ID!=0 ) {
+ claw_snd_disc(dev, p_ctlbk);
+ printk(KERN_INFO "%s: Conn Req error : "
+ "already logical link is active \n",
+ dev->name);
+ }
+ if (p_ctlbk->linkid!=1 ) {
+ claw_snd_disc(dev, p_ctlbk);
+ printk(KERN_INFO "%s: Conn Req error : "
+ "req logical link id is not 1\n",
+ dev->name);
+ }
+ rc=find_link(dev,
+ p_connect->host_name, p_connect->WS_name);
+ if (rc!=0) {
+ claw_snd_disc(dev, p_ctlbk);
+ printk(KERN_INFO "%s: Conn Req error : "
+ "req appl name does not match\n",
+ dev->name);
+ }
+ claw_send_control(dev,
+ CONNECTION_CONFIRM, p_ctlbk->linkid,
+ p_ctlbk->correlator,
+ 0, p_connect->host_name,
+ p_connect->WS_name);
+ if (p_env->packing == PACKING_ASK) {
+ printk("%s: Now Pack ask\n",dev->name);
+ p_env->packing = PACK_SEND;
+ claw_snd_conn_req(dev,0);
+ }
+ printk(KERN_INFO "%s: CLAW device %.8s: Connection "
+ "completed link_id=%d.\n",
+ dev->name, temp_ws_name,
+ p_ctlbk->linkid);
+ privptr->active_link_ID=p_ctlbk->linkid;
+ p_ch=&privptr->channel[WRITE];
+ wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
+ break;
+ case CONNECTION_RESPONSE:
+ p_connect=(struct conncmd *)&(p_ctlbk->data);
+ printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
+ "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
+ dev->name,
+ p_ctlbk->version,
+ p_ctlbk->linkid,
+ p_ctlbk->correlator,
+ p_ctlbk->rc,
+ p_connect->host_name,
+ p_connect->WS_name);
+
+ if (p_ctlbk->rc !=0 ) {
+ printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
+ dev->name, p_ctlbk->rc);
+ return 1;
+ }
+ rc=find_link(dev,
+ p_connect->host_name, p_connect->WS_name);
+ if (rc!=0) {
+ claw_snd_disc(dev, p_ctlbk);
+ printk(KERN_INFO "%s: Conn Resp error: "
+ "req appl name does not match\n",
+ dev->name);
+ }
+ /* should be until CONNECTION_CONFIRM */
+ privptr->active_link_ID = - (p_ctlbk->linkid);
+ break;
+ case CONNECTION_CONFIRM:
+ p_connect=(struct conncmd *)&(p_ctlbk->data);
+ printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
+ "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
+ dev->name,
+ p_ctlbk->version,
+ p_ctlbk->linkid,
+ p_ctlbk->correlator,
+ p_connect->host_name,
+ p_connect->WS_name);
+ if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
+ privptr->active_link_ID=p_ctlbk->linkid;
+ if (p_env->packing > PACKING_ASK) {
+ printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
+ p_env->packing = DO_PACKED;
+ }
+ p_ch=&privptr->channel[WRITE];
+ wake_up(&p_ch->wait);
+ }
+ else {
+ printk(KERN_INFO "%s: Conn confirm: "
+ "unexpected linkid=%d \n",
+ dev->name, p_ctlbk->linkid);
+ claw_snd_disc(dev, p_ctlbk);
+ }
+ break;
+ case DISCONNECT:
+ printk(KERN_INFO "%s: Disconnect: "
+ "Vers=%d,link_id=%d,Corr=%d\n",
+ dev->name, p_ctlbk->version,
+ p_ctlbk->linkid, p_ctlbk->correlator);
+ if ((p_ctlbk->linkid == 2) &&
+ (p_env->packing == PACK_SEND)) {
+ privptr->active_link_ID = 1;
+ p_env->packing = DO_PACKED;
+ }
+ else
+ privptr->active_link_ID=0;
+ break;
+ case CLAW_ERROR:
+ printk(KERN_INFO "%s: CLAW ERROR detected\n",
+ dev->name);
+ break;
+ default:
+ printk(KERN_INFO "%s: Unexpected command code=%d \n",
+ dev->name, p_ctlbk->command);
+ break;
+ }
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+
+ return 0;
+} /* end of claw_process_control */
+
+
+/*-------------------------------------------------------------------*
+* claw_send_control *
+* *
+*--------------------------------------------------------------------*/
+
+static int
+claw_send_control(struct net_device *dev, __u8 type, __u8 link,
+ __u8 correlator, __u8 rc, char *local_name, char *remote_name)
+{
+ struct claw_privbk *privptr;
+ struct clawctl *p_ctl;
+ struct sysval *p_sysval;
+ struct conncmd *p_connect;
+ struct sk_buff *skb;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"sndcntl");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
+ printk(KERN_INFO "%s: variable type = 0x%X, link = "
+ "%d, correlator = %d, rc = %d\n",
+ dev->name,type, link, correlator, rc);
+ printk(KERN_INFO "%s: variable local_name = %s, "
+ "remote_name = %s\n",dev->name, local_name, remote_name);
+#endif
+ privptr=dev->priv;
+ p_ctl=(struct clawctl *)&privptr->ctl_bk;
+
+ p_ctl->command=type;
+ p_ctl->version=CLAW_VERSION_ID;
+ p_ctl->linkid=link;
+ p_ctl->correlator=correlator;
+ p_ctl->rc=rc;
+
+ p_sysval=(struct sysval *)&p_ctl->data;
+ p_connect=(struct conncmd *)&p_ctl->data;
+
+ switch (p_ctl->command) {
+ case SYSTEM_VALIDATE_REQUEST:
+ case SYSTEM_VALIDATE_RESPONSE:
+ memcpy(&p_sysval->host_name, local_name, 8);
+ memcpy(&p_sysval->WS_name, remote_name, 8);
+ if (privptr->p_env->packing > 0) {
+ p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
+ p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
+ } else {
+ /* how big is the piggest group of packets */
+ p_sysval->read_frame_size=privptr->p_env->read_size;
+ p_sysval->write_frame_size=privptr->p_env->write_size;
+ }
+ memset(&p_sysval->reserved, 0x00, 4);
+ break;
+ case CONNECTION_REQUEST:
+ case CONNECTION_RESPONSE:
+ case CONNECTION_CONFIRM:
+ case DISCONNECT:
+ memcpy(&p_sysval->host_name, local_name, 8);
+ memcpy(&p_sysval->WS_name, remote_name, 8);
+ if (privptr->p_env->packing > 0) {
+ /* How big is the biggest packet */
+ p_connect->reserved1[0]=CLAW_FRAME_SIZE;
+ p_connect->reserved1[1]=CLAW_FRAME_SIZE;
+ } else {
+ memset(&p_connect->reserved1, 0x00, 4);
+ memset(&p_connect->reserved2, 0x00, 4);
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* write Control Record to the device */
+
+
+ skb = dev_alloc_skb(sizeof(struct clawctl));
+ if (!skb) {
+ printk( "%s:%s low on mem, returning...\n",
+ dev->name,__FUNCTION__);
+#ifdef DEBUG
+ printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
+ dev->name,__FUNCTION__);
+#endif
+ return -ENOMEM;
+ }
+ memcpy(skb_put(skb, sizeof(struct clawctl)),
+ p_ctl, sizeof(struct clawctl));
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
+ dumpit((char *)p_ctl,sizeof(struct clawctl));
+#endif
+ if (privptr->p_env->packing >= PACK_SEND)
+ claw_hw_tx(skb, dev, 1);
+ else
+ claw_hw_tx(skb, dev, 0);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+
+ return 0;
+} /* end of claw_send_control */
+
+/*-------------------------------------------------------------------*
+* claw_snd_conn_req *
+* *
+*--------------------------------------------------------------------*/
+static int
+claw_snd_conn_req(struct net_device *dev, __u8 link)
+{
+ int rc;
+ struct claw_privbk *privptr=dev->priv;
+ struct clawctl *p_ctl;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"snd_conn");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
+ dumpit((char *) dev, sizeof(struct net_device));
+#endif
+ rc = 1;
+ p_ctl=(struct clawctl *)&privptr->ctl_bk;
+ p_ctl->linkid = link;
+ if ( privptr->system_validate_comp==0x00 ) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return rc;
+ }
+ if (privptr->p_env->packing == PACKING_ASK )
+ rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
+ WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
+ if (privptr->p_env->packing == PACK_SEND) {
+ rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
+ WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
+ }
+ if (privptr->p_env->packing == 0)
+ rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
+ HOST_APPL_NAME, privptr->p_env->api_type);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
+ dev->name,__FUNCTION__,__LINE__, rc);
+#endif
+ return rc;
+
+} /* end of claw_snd_conn_req */
+
+
+/*-------------------------------------------------------------------*
+* claw_snd_disc *
+* *
+*--------------------------------------------------------------------*/
+
+static int
+claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
+{
+ int rc;
+ struct conncmd * p_connect;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"snd_dsc");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable dev =\n",dev->name);
+ dumpit((char *) dev, sizeof(struct net_device));
+ printk(KERN_INFO "%s: variable p_ctl",dev->name);
+ dumpit((char *) p_ctl, sizeof(struct clawctl));
+#endif
+ p_connect=(struct conncmd *)&p_ctl->data;
+
+ rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
+ p_ctl->correlator, 0,
+ p_connect->host_name, p_connect->WS_name);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
+ dev->name,__FUNCTION__, __LINE__, rc);
+#endif
+ return rc;
+} /* end of claw_snd_disc */
+
+
+/*-------------------------------------------------------------------*
+* claw_snd_sys_validate_rsp *
+* *
+*--------------------------------------------------------------------*/
+
+static int
+claw_snd_sys_validate_rsp(struct net_device *dev,
+ struct clawctl *p_ctl, __u32 return_code)
+{
+ struct claw_env * p_env;
+ struct claw_privbk *privptr;
+ int rc;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",
+ dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"chkresp");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
+ dev->name, return_code);
+ dumpit((char *) dev, sizeof(struct net_device));
+ printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
+ dumpit((char *) p_ctl, sizeof(struct clawctl));
+#endif
+ privptr = dev->priv;
+ p_env=privptr->p_env;
+ rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
+ p_ctl->linkid,
+ p_ctl->correlator,
+ return_code,
+ p_env->host_name,
+ p_env->adapter_name );
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
+ dev->name,__FUNCTION__,__LINE__, rc);
+#endif
+ return rc;
+} /* end of claw_snd_sys_validate_rsp */
+
+/*-------------------------------------------------------------------*
+* claw_strt_conn_req *
+* *
+*--------------------------------------------------------------------*/
+
+static int
+claw_strt_conn_req(struct net_device *dev )
+{
+ int rc;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"conn_req");
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: variable dev =\n",dev->name);
+ dumpit((char *) dev, sizeof(struct net_device));
+#endif
+ rc=claw_snd_conn_req(dev, 1);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
+ dev->name,__FUNCTION__,__LINE__, rc);
+#endif
+ return rc;
+} /* end of claw_strt_conn_req */
+
+
+
+/*-------------------------------------------------------------------*
+ * claw_stats *
+ *-------------------------------------------------------------------*/
+
+static struct
+net_device_stats *claw_stats(struct net_device *dev)
+{
+ struct claw_privbk *privptr;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"stats");
+ privptr = dev->priv;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return &privptr->stats;
+} /* end of claw_stats */
+
+
+/*-------------------------------------------------------------------*
+* unpack_read *
+* *
+*--------------------------------------------------------------------*/
+static void
+unpack_read(struct net_device *dev )
+{
+ struct sk_buff *skb;
+ struct claw_privbk *privptr;
+ struct claw_env *p_env;
+ struct ccwbk *p_this_ccw;
+ struct ccwbk *p_first_ccw;
+ struct ccwbk *p_last_ccw;
+ struct clawph *p_packh;
+ void *p_packd;
+ struct clawctl *p_ctlrec=NULL;
+
+ __u32 len_of_data;
+ __u32 pack_off;
+ __u8 link_num;
+ __u8 mtc_this_frm=0;
+ __u32 bytes_to_mov;
+ struct chbk *p_ch = NULL;
+ int i=0;
+ int p=0;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s enter \n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"unpkread");
+ p_first_ccw=NULL;
+ p_last_ccw=NULL;
+ p_packh=NULL;
+ p_packd=NULL;
+ privptr=dev->priv;
+ p_env = privptr->p_env;
+ p_this_ccw=privptr->p_read_active_first;
+ i=0;
+ while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
+#ifdef IOTRACE
+ printk(KERN_INFO "%s p_this_ccw \n",dev->name);
+ dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
+ printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
+ " pk=%d \n",dev->name,p_env->packing);
+ dumpit((char *)p_this_ccw->p_buffer, 64 );
+#endif
+ pack_off = 0;
+ p = 0;
+ p_this_ccw->header.flag=CLAW_PENDING;
+ privptr->p_read_active_first=p_this_ccw->next;
+ p_this_ccw->next=NULL;
+ p_packh = (struct clawph *)p_this_ccw->p_buffer;
+ if ((p_env->packing == PACK_SEND) &&
+ (p_packh->len == 32) &&
+ (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
+ p_packh++; /* peek past pack header */
+ p_ctlrec = (struct clawctl *)p_packh;
+ p_packh--; /* un peek */
+ if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
+ (p_ctlrec->command == CONNECTION_CONFIRM))
+ p_env->packing = DO_PACKED;
+ }
+ if (p_env->packing == DO_PACKED)
+ link_num=p_packh->link_num;
+ else
+ link_num=p_this_ccw->header.opcode / 8;
+ if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s > More_to_come is ON\n",
+ dev->name,__FUNCTION__);
+#endif
+ mtc_this_frm=1;
+ if (p_this_ccw->header.length!=
+ privptr->p_env->read_size ) {
+ printk(KERN_INFO " %s: Invalid frame detected "
+ "length is %02x\n" ,
+ dev->name, p_this_ccw->header.length);
+ }
+ }
+
+ if (privptr->mtc_skipping) {
+ /*
+ * We're in the mode of skipping past a
+ * multi-frame message
+ * that we can't process for some reason or other.
+ * The first frame without the More-To-Come flag is
+ * the last frame of the skipped message.
+ */
+ /* in case of More-To-Come not set in this frame */
+ if (mtc_this_frm==0) {
+ privptr->mtc_skipping=0; /* Ok, the end */
+ privptr->mtc_logical_link=-1;
+ }
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s goto next "
+ "frame from MoretoComeSkip \n",
+ dev->name,__FUNCTION__);
+#endif
+ goto NextFrame;
+ }
+
+ if (link_num==0) {
+ claw_process_control(dev, p_this_ccw);
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s goto next "
+ "frame from claw_process_control \n",
+ dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"UnpkCntl");
+ goto NextFrame;
+ }
+unpack_next:
+ if (p_env->packing == DO_PACKED) {
+ if (pack_off > p_env->read_size)
+ goto NextFrame;
+ p_packd = p_this_ccw->p_buffer+pack_off;
+ p_packh = (struct clawph *) p_packd;
+ if ((p_packh->len == 0) || /* all done with this frame? */
+ (p_packh->flag != 0))
+ goto NextFrame;
+ bytes_to_mov = p_packh->len;
+ pack_off += bytes_to_mov+sizeof(struct clawph);
+ p++;
+ } else {
+ bytes_to_mov=p_this_ccw->header.length;
+ }
+ if (privptr->mtc_logical_link<0) {
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s mtc_logical_link < 0 \n",
+ dev->name,__FUNCTION__);
+#endif
+
+ /*
+ * if More-To-Come is set in this frame then we don't know
+ * length of entire message, and hence have to allocate
+ * large buffer */
+
+ /* We are starting a new envelope */
+ privptr->mtc_offset=0;
+ privptr->mtc_logical_link=link_num;
+ }
+
+ if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
+ /* error */
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s > goto next "
+ "frame from MoretoComeSkip \n",
+ dev->name,
+ __FUNCTION__);
+ printk(KERN_INFO " bytes_to_mov %d > (MAX_ENVELOPE_"
+ "SIZE-privptr->mtc_offset %d)\n",
+ bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
+#endif
+ privptr->stats.rx_frame_errors++;
+ goto NextFrame;
+ }
+ if (p_env->packing == DO_PACKED) {
+ memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
+ p_packd+sizeof(struct clawph), bytes_to_mov);
+
+ } else {
+ memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
+ p_this_ccw->p_buffer, bytes_to_mov);
+ }
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() received data \n",
+ dev->name,__FUNCTION__);
+ if (p_env->packing == DO_PACKED)
+ dumpit((char *)p_packd+sizeof(struct clawph),32);
+ else
+ dumpit((char *)p_this_ccw->p_buffer, 32);
+ printk(KERN_INFO "%s: %s() bytelength %d \n",
+ dev->name,__FUNCTION__,bytes_to_mov);
+#endif
+ if (mtc_this_frm==0) {
+ len_of_data=privptr->mtc_offset+bytes_to_mov;
+ skb=dev_alloc_skb(len_of_data);
+ if (skb) {
+ memcpy(skb_put(skb,len_of_data),
+ privptr->p_mtc_envelope,
+ len_of_data);
+ skb->mac.raw=skb->data;
+ skb->dev=dev;
+ skb->protocol=htons(ETH_P_IP);
+ skb->ip_summed=CHECKSUM_UNNECESSARY;
+ privptr->stats.rx_packets++;
+ privptr->stats.rx_bytes+=len_of_data;
+ netif_rx(skb);
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: %s() netif_"
+ "rx(skb) completed \n",
+ dev->name,__FUNCTION__);
+#endif
+ }
+ else {
+ privptr->stats.rx_dropped++;
+ printk(KERN_WARNING "%s: %s() low on memory\n",
+ dev->name,__FUNCTION__);
+ }
+ privptr->mtc_offset=0;
+ privptr->mtc_logical_link=-1;
+ }
+ else {
+ privptr->mtc_offset+=bytes_to_mov;
+ }
+ if (p_env->packing == DO_PACKED)
+ goto unpack_next;
+NextFrame:
+ /*
+ * Remove ThisCCWblock from active read queue, and add it
+ * to queue of free blocks to be reused.
+ */
+ i++;
+ p_this_ccw->header.length=0xffff;
+ p_this_ccw->header.opcode=0xff;
+ /*
+ * add this one to the free queue for later reuse
+ */
+ if (p_first_ccw==NULL) {
+ p_first_ccw = p_this_ccw;
+ }
+ else {
+ p_last_ccw->next = p_this_ccw;
+ }
+ p_last_ccw = p_this_ccw;
+ /*
+ * chain to next block on active read queue
+ */
+ p_this_ccw = privptr->p_read_active_first;
+ CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
+ } /* end of while */
+
+ /* check validity */
+
+#ifdef IOTRACE
+ printk(KERN_INFO "%s:%s processed frame is %d \n",
+ dev->name,__FUNCTION__,i);
+ printk(KERN_INFO "%s:%s F:%lx L:%lx\n",
+ dev->name,
+ __FUNCTION__,
+ (unsigned long)p_first_ccw,
+ (unsigned long)p_last_ccw);
+#endif
+ CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
+ add_claw_reads(dev, p_first_ccw, p_last_ccw);
+ p_ch=&privptr->channel[READ];
+ claw_strt_read(dev, LOCK_YES);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s: %s exit on line %d\n",
+ dev->name, __FUNCTION__, __LINE__);
+#endif
+ return;
+} /* end of unpack_read */
+
+/*-------------------------------------------------------------------*
+* claw_strt_read *
+* *
+*--------------------------------------------------------------------*/
+static void
+claw_strt_read (struct net_device *dev, int lock )
+{
+ int rc = 0;
+ __u32 parm;
+ unsigned long saveflags = 0;
+ struct claw_privbk *privptr=dev->priv;
+ struct ccwbk*p_ccwbk;
+ struct chbk *p_ch;
+ struct clawh *p_clawh;
+ p_ch=&privptr->channel[READ];
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
+ printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
+ dumpit((char *) dev, sizeof(struct net_device));
+#endif
+ CLAW_DBF_TEXT(4,trace,"StRdNter");
+ p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
+ p_clawh->flag=CLAW_IDLE; /* 0x00 */
+
+ if ((privptr->p_write_active_first!=NULL &&
+ privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
+ (privptr->p_read_active_first!=NULL &&
+ privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
+ p_clawh->flag=CLAW_BUSY; /* 0xff */
+ }
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s state-%02x\n" ,
+ dev->name,__FUNCTION__, p_ch->claw_state);
+#endif
+ if (lock==LOCK_YES) {
+ spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
+ }
+ if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: HOT READ started in %s\n" ,
+ dev->name,__FUNCTION__);
+ p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
+ dumpit((char *)&p_clawh->flag , 1);
+#endif
+ CLAW_DBF_TEXT(4,trace,"HotRead");
+ p_ccwbk=privptr->p_read_active_first;
+ parm = (unsigned long) p_ch;
+ rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
+ 0xff, 0);
+ if (rc != 0) {
+ ccw_check_return_code(p_ch->cdev, rc);
+ }
+ }
+ else {
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
+ dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,trace,"ReadAct");
+ }
+
+ if (lock==LOCK_YES) {
+ spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ CLAW_DBF_TEXT(4,trace,"StRdExit");
+ return;
+} /* end of claw_strt_read */
+
+/*-------------------------------------------------------------------*
+* claw_strt_out_IO *
+* *
+*--------------------------------------------------------------------*/
+
+static void
+claw_strt_out_IO( struct net_device *dev )
+{
+ int rc = 0;
+ unsigned long parm;
+ struct claw_privbk *privptr;
+ struct chbk *p_ch;
+ struct ccwbk *p_first_ccw;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+ if (!dev) {
+ return;
+ }
+ privptr=(struct claw_privbk *)dev->priv;
+ p_ch=&privptr->channel[WRITE];
+
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s state-%02x\n" ,
+ dev->name,__FUNCTION__,p_ch->claw_state);
+#endif
+ CLAW_DBF_TEXT(4,trace,"strt_io");
+ p_first_ccw=privptr->p_write_active_first;
+
+ if (p_ch->claw_state == CLAW_STOP)
+ return;
+ if (p_first_ccw == NULL) {
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+ return;
+ }
+ if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
+ parm = (unsigned long) p_ch;
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
+ dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
+#endif
+ CLAW_DBF_TEXT(2,trace,"StWrtIO");
+ rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
+ 0xff, 0);
+ if (rc != 0) {
+ ccw_check_return_code(p_ch->cdev, rc);
+ }
+ }
+ dev->trans_start = jiffies;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ dev->name,__FUNCTION__,__LINE__);
+#endif
+
+ return;
+} /* end of claw_strt_out_IO */
+
+/*-------------------------------------------------------------------*
+* Free write buffers *
+* *
+*--------------------------------------------------------------------*/
+
+static void
+claw_free_wrt_buf( struct net_device *dev )
+{
+
+ struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
+ struct ccwbk*p_first_ccw;
+ struct ccwbk*p_last_ccw;
+ struct ccwbk*p_this_ccw;
+ struct ccwbk*p_next_ccw;
+#ifdef IOTRACE
+ struct ccwbk*p_buf;
+#endif
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+ printk(KERN_INFO "%s: free count = %d variable dev =\n",
+ dev->name,privptr->write_free_count);
+#endif
+ CLAW_DBF_TEXT(4,trace,"freewrtb");
+ /* scan the write queue to free any completed write packets */
+ p_first_ccw=NULL;
+ p_last_ccw=NULL;
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: Dump current CCW chain \n",dev->name );
+ p_buf=privptr->p_write_active_first;
+ while (p_buf!=NULL) {
+ dumpit((char *)p_buf, sizeof(struct ccwbk));
+ p_buf=p_buf->next;
+ }
+ if (p_buf==NULL) {
+ printk(KERN_INFO "%s: privptr->p_write_"
+ "active_first==NULL\n",dev->name );
+ }
+ p_buf=(struct ccwbk*)privptr->p_end_ccw;
+ dumpit((char *)p_buf, sizeof(struct endccw));
+#endif
+ p_this_ccw=privptr->p_write_active_first;
+ while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
+ {
+ p_next_ccw = p_this_ccw->next;
+ if (((p_next_ccw!=NULL) &&
+ (p_next_ccw->header.flag!=CLAW_PENDING)) ||
+ ((p_this_ccw == privptr->p_write_active_last) &&
+ (p_this_ccw->header.flag!=CLAW_PENDING))) {
+ /* The next CCW is OK or this is */
+ /* the last CCW...free it @A1A */
+ privptr->p_write_active_first=p_this_ccw->next;
+ p_this_ccw->header.flag=CLAW_PENDING;
+ p_this_ccw->next=privptr->p_write_free_chain;
+ privptr->p_write_free_chain=p_this_ccw;
+ ++privptr->write_free_count;
+ privptr->stats.tx_bytes+= p_this_ccw->write.count;
+ p_this_ccw=privptr->p_write_active_first;
+ privptr->stats.tx_packets++;
+ }
+ else {
+ break;
+ }
+ }
+ if (privptr->write_free_count!=0) {
+ claw_clearbit_busy(TB_NOBUFFER,dev);
+ }
+ /* whole chain removed? */
+ if (privptr->p_write_active_first==NULL) {
+ privptr->p_write_active_last=NULL;
+#ifdef DEBUGMSG
+ printk(KERN_INFO "%s:%s p_write_"
+ "active_first==NULL\n",dev->name,__FUNCTION__);
+#endif
+ }
+#ifdef IOTRACE
+ printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name );
+ p_buf=privptr->p_write_active_first;
+ while (p_buf!=NULL) {
+ dumpit((char *)p_buf, sizeof(struct ccwbk));
+ p_buf=p_buf->next;
+ }
+ if (p_buf==NULL) {
+ printk(KERN_INFO "%s: privptr->p_write_active_"
+ "first==NULL\n",dev->name );
+ }
+ p_buf=(struct ccwbk*)privptr->p_end_ccw;
+ dumpit((char *)p_buf, sizeof(struct endccw));
+#endif
+
+ CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
+ dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
+#endif
+ return;
+}
+
+/*-------------------------------------------------------------------*
+* claw free netdevice *
+* *
+*--------------------------------------------------------------------*/
+static void
+claw_free_netdevice(struct net_device * dev, int free_dev)
+{
+ struct claw_privbk *privptr;
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"free_dev");
+
+ if (!dev)
+ return;
+ CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
+ privptr = dev->priv;
+ if (dev->flags & IFF_RUNNING)
+ claw_release(dev);
+ if (privptr) {
+ privptr->channel[READ].ndev = NULL; /* say it's free */
+ }
+ dev->priv=NULL;
+#ifdef MODULE
+ if (free_dev) {
+ free_netdev(dev);
+ }
+#endif
+ CLAW_DBF_TEXT(2,setup,"feee_ok");
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
+#endif
+}
+
+/**
+ * Claw init netdevice
+ * Initialize everything of the net device except the name and the
+ * channel structs.
+ */
+static void
+claw_init_netdevice(struct net_device * dev)
+{
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"init_dev");
+ CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
+ if (!dev) {
+ printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
+ __FUNCTION__,__LINE__);
+ CLAW_DBF_TEXT(2,setup,"baddev");
+ return;
+ }
+ dev->mtu = CLAW_DEFAULT_MTU_SIZE;
+ dev->hard_start_xmit = claw_tx;
+ dev->open = claw_open;
+ dev->stop = claw_release;
+ dev->get_stats = claw_stats;
+ dev->change_mtu = claw_change_mtu;
+ dev->hard_header_len = 0;
+ dev->addr_len = 0;
+ dev->type = ARPHRD_SLIP;
+ dev->tx_queue_len = 1300;
+ dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+ SET_MODULE_OWNER(dev);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT(2,setup,"initok");
+ return;
+}
+
+/**
+ * Init a new channel in the privptr->channel[i].
+ *
+ * @param cdev The ccw_device to be added.
+ *
+ * @return 0 on success, !0 on error.
+ */
+static int
+add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
+{
+ struct chbk *p_ch;
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
+#endif
+ CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
+ privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
+ p_ch = &privptr->channel[i];
+ p_ch->cdev = cdev;
+ snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
+ sscanf(cdev->dev.bus_id+4,"%x",&p_ch->devno);
+ if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
+ printk(KERN_WARNING "%s Out of memory in %s for irb\n",
+ p_ch->id,__FUNCTION__);
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ p_ch->id,__FUNCTION__,__LINE__);
+#endif
+ return -ENOMEM;
+ }
+ memset(p_ch->irb, 0, sizeof (struct irb));
+#ifdef FUNCTRACE
+ printk(KERN_INFO "%s:%s Exit on line %d\n",
+ cdev->dev.bus_id,__FUNCTION__,__LINE__);
+#endif
+ return 0;
+}
+
+
+/**
+ *
+ * Setup an interface.
+ *
+ * @param cgdev Device to be setup.
+ *
+ * @returns 0 on success, !0 on failure.
+ */
+static int
+claw_new_device(struct ccwgroup_device *cgdev)
+{
+ struct claw_privbk *privptr;
+ struct claw_env *p_env;
+ struct net_device *dev;
+ int ret;
+
+ pr_debug("%s() called\n", __FUNCTION__);
+ printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
+ CLAW_DBF_TEXT(2,setup,"new_dev");
+ privptr = cgdev->dev.driver_data;
+ cgdev->cdev[READ]->dev.driver_data = privptr;
+ cgdev->cdev[WRITE]->dev.driver_data = privptr;
+ if (!privptr)
+ return -ENODEV;
+ p_env = privptr->p_env;
+ sscanf(cgdev->cdev[READ]->dev.bus_id+4,"%x",
+ &p_env->devno[READ]);
+ sscanf(cgdev->cdev[WRITE]->dev.bus_id+4,"%x",
+ &p_env->devno[WRITE]);
+ ret = add_channel(cgdev->cdev[0],0,privptr);
+ if (ret == 0)
+ ret = add_channel(cgdev->cdev[1],1,privptr);
+ if (ret != 0) {
+ printk(KERN_WARNING
+ "add channel failed "
+ "with ret = %d\n", ret);
+ goto out;
+ }
+ ret = ccw_device_set_online(cgdev->cdev[READ]);
+ if (ret != 0) {
+ printk(KERN_WARNING
+ "claw: ccw_device_set_online %s READ failed "
+ "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
+ goto out;
+ }
+ ret = ccw_device_set_online(cgdev->cdev[WRITE]);
+ if (ret != 0) {
+ printk(KERN_WARNING
+ "claw: ccw_device_set_online %s WRITE failed "
+ "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
+ goto out;
+ }
+ dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
+ if (!dev) {
+ printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
+ goto out;
+ }
+ dev->priv = privptr;
+ cgdev->dev.driver_data = privptr;
+ cgdev->cdev[READ]->dev.driver_data = privptr;
+ cgdev->cdev[WRITE]->dev.driver_data = privptr;
+ /* sysfs magic */
+ SET_NETDEV_DEV(dev, &cgdev->dev);
+ if (register_netdev(dev) != 0) {
+ claw_free_netdevice(dev, 1);
+ CLAW_DBF_TEXT(2,trace,"regfail");
+ goto out;
+ }
+ dev->flags &=~IFF_RUNNING;
+ if (privptr->buffs_alloc == 0) {
+ ret=init_ccw_bk(dev);
+ if (ret !=0) {
+ printk(KERN_WARNING
+ "claw: init_ccw_bk failed with ret=%d\n", ret);
+ unregister_netdev(dev);
+ claw_free_netdevice(dev,1);
+ CLAW_DBF_TEXT(2,trace,"ccwmem");
+ goto out;
+ }
+ }
+ privptr->channel[READ].ndev = dev;
+ privptr->channel[WRITE].ndev = dev;
+ privptr->p_env->ndev = dev;
+
+ printk(KERN_INFO "%s:readsize=%d writesize=%d "
+ "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
+ dev->name, p_env->read_size,
+ p_env->write_size, p_env->read_buffers,
+ p_env->write_buffers, p_env->devno[READ],
+ p_env->devno[WRITE]);
+ printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
+ ":%.8s api_type: %.8s\n",
+ dev->name, p_env->host_name,
+ p_env->adapter_name , p_env->api_type);
+ return 0;
+out:
+ ccw_device_set_offline(cgdev->cdev[1]);
+ ccw_device_set_offline(cgdev->cdev[0]);
+
+ return -ENODEV;
+}
+
+static void
+claw_purge_skb_queue(struct sk_buff_head *q)
+{
+ struct sk_buff *skb;
+
+ CLAW_DBF_TEXT(4,trace,"purgque");
+
+ while ((skb = skb_dequeue(q))) {
+ atomic_dec(&skb->users);
+ dev_kfree_skb_irq(skb);
+ }
+}
+
+/**
+ * Shutdown an interface.
+ *
+ * @param cgdev Device to be shut down.
+ *
+ * @returns 0 on success, !0 on failure.
+ */
+static int
+claw_shutdown_device(struct ccwgroup_device *cgdev)
+{
+ struct claw_privbk *priv;
+ struct net_device *ndev;
+ int ret;
+
+ pr_debug("%s() called\n", __FUNCTION__);
+ CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
+ priv = cgdev->dev.driver_data;
+ if (!priv)
+ return -ENODEV;
+ ndev = priv->channel[READ].ndev;
+ if (ndev) {
+ /* Close the device */
+ printk(KERN_INFO
+ "%s: shuting down \n",ndev->name);
+ if (ndev->flags & IFF_RUNNING)
+ ret = claw_release(ndev);
+ ndev->flags &=~IFF_RUNNING;
+ unregister_netdev(ndev);
+ ndev->priv = NULL; /* cgdev data, not ndev's to free */
+ claw_free_netdevice(ndev, 1);
+ priv->channel[READ].ndev = NULL;
+ priv->channel[WRITE].ndev = NULL;
+ priv->p_env->ndev = NULL;
+ }
+ ccw_device_set_offline(cgdev->cdev[1]);
+ ccw_device_set_offline(cgdev->cdev[0]);
+ return 0;
+}
+
+static void
+claw_remove_device(struct ccwgroup_device *cgdev)
+{
+ struct claw_privbk *priv;
+
+ pr_debug("%s() called\n", __FUNCTION__);
+ CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
+ priv = cgdev->dev.driver_data;
+ if (!priv) {
+ printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
+ return;
+ }
+ printk(KERN_INFO "claw: %s() called %s will be removed.\n",
+ __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
+ if (cgdev->state == CCWGROUP_ONLINE)
+ claw_shutdown_device(cgdev);
+ claw_remove_files(&cgdev->dev);
+ if (priv->p_mtc_envelope!=NULL) {
+ kfree(priv->p_mtc_envelope);
+ priv->p_mtc_envelope=NULL;
+ }
+ if (priv->p_env != NULL) {
+ kfree(priv->p_env);
+ priv->p_env=NULL;
+ }
+ if (priv->channel[0].irb != NULL) {
+ kfree(priv->channel[0].irb);
+ priv->channel[0].irb=NULL;
+ }
+ if (priv->channel[1].irb != NULL) {
+ kfree(priv->channel[1].irb);
+ priv->channel[1].irb=NULL;
+ }
+ kfree(priv);
+ cgdev->dev.driver_data=NULL;
+ cgdev->cdev[READ]->dev.driver_data = NULL;
+ cgdev->cdev[WRITE]->dev.driver_data = NULL;
+ put_device(&cgdev->dev);
+}
+
+
+/*
+ * sysfs attributes
+ */
+static ssize_t
+claw_hname_show(struct device *dev, char *buf)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ return sprintf(buf, "%s\n",p_env->host_name);
+}
+
+static ssize_t
+claw_hname_write(struct device *dev, const char *buf, size_t count)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ if (count > MAX_NAME_LEN+1)
+ return -EINVAL;
+ memset(p_env->host_name, 0x20, MAX_NAME_LEN);
+ strncpy(p_env->host_name,buf, count);
+ p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
+ p_env->host_name[MAX_NAME_LEN] = 0x00;
+ CLAW_DBF_TEXT(2,setup,"HstnSet");
+ CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
+
+ return count;
+}
+
+static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
+
+static ssize_t
+claw_adname_show(struct device *dev, char *buf)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ return sprintf(buf, "%s\n",p_env->adapter_name);
+}
+
+static ssize_t
+claw_adname_write(struct device *dev, const char *buf, size_t count)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ if (count > MAX_NAME_LEN+1)
+ return -EINVAL;
+ memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
+ strncpy(p_env->adapter_name,buf, count);
+ p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
+ p_env->adapter_name[MAX_NAME_LEN] = 0x00;
+ CLAW_DBF_TEXT(2,setup,"AdnSet");
+ CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
+
+ return count;
+}
+
+static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
+
+static ssize_t
+claw_apname_show(struct device *dev, char *buf)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ return sprintf(buf, "%s\n",
+ p_env->api_type);
+}
+
+static ssize_t
+claw_apname_write(struct device *dev, const char *buf, size_t count)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ if (count > MAX_NAME_LEN+1)
+ return -EINVAL;
+ memset(p_env->api_type, 0x20, MAX_NAME_LEN);
+ strncpy(p_env->api_type,buf, count);
+ p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
+ p_env->api_type[MAX_NAME_LEN] = 0x00;
+ if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
+ p_env->read_size=DEF_PACK_BUFSIZE;
+ p_env->write_size=DEF_PACK_BUFSIZE;
+ p_env->packing=PACKING_ASK;
+ CLAW_DBF_TEXT(2,setup,"PACKING");
+ }
+ else {
+ p_env->packing=0;
+ p_env->read_size=CLAW_FRAME_SIZE;
+ p_env->write_size=CLAW_FRAME_SIZE;
+ CLAW_DBF_TEXT(2,setup,"ApiSet");
+ }
+ CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
+ return count;
+}
+
+static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
+
+static ssize_t
+claw_wbuff_show(struct device *dev, char *buf)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ return sprintf(buf, "%d\n", p_env->write_buffers);
+}
+
+static ssize_t
+claw_wbuff_write(struct device *dev, const char *buf, size_t count)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+ int nnn,max;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ sscanf(buf, "%i", &nnn);
+ if (p_env->packing) {
+ max = 64;
+ }
+ else {
+ max = 512;
+ }
+ if ((nnn > max ) || (nnn < 2))
+ return -EINVAL;
+ p_env->write_buffers = nnn;
+ CLAW_DBF_TEXT(2,setup,"Wbufset");
+ CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
+ return count;
+}
+
+static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
+
+static ssize_t
+claw_rbuff_show(struct device *dev, char *buf)
+{
+ struct claw_privbk *priv;
+ struct claw_env * p_env;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ return sprintf(buf, "%d\n", p_env->read_buffers);
+}
+
+static ssize_t
+claw_rbuff_write(struct device *dev, const char *buf, size_t count)
+{
+ struct claw_privbk *priv;
+ struct claw_env *p_env;
+ int nnn,max;
+
+ priv = dev->driver_data;
+ if (!priv)
+ return -ENODEV;
+ p_env = priv->p_env;
+ sscanf(buf, "%i", &nnn);
+ if (p_env->packing) {
+ max = 64;
+ }
+ else {
+ max = 512;
+ }
+ if ((nnn > max ) || (nnn < 2))
+ return -EINVAL;
+ p_env->read_buffers = nnn;
+ CLAW_DBF_TEXT(2,setup,"Rbufset");
+ CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
+ return count;
+}
+
+static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
+
+static struct attribute *claw_attr[] = {
+ &dev_attr_read_buffer.attr,
+ &dev_attr_write_buffer.attr,
+ &dev_attr_adapter_name.attr,
+ &dev_attr_api_type.attr,
+ &dev_attr_host_name.attr,
+ NULL,
+};
+
+static struct attribute_group claw_attr_group = {
+ .attrs = claw_attr,
+};
+
+static int
+claw_add_files(struct device *dev)
+{
+ pr_debug("%s() called\n", __FUNCTION__);
+ CLAW_DBF_TEXT(2,setup,"add_file");
+ return sysfs_create_group(&dev->kobj, &claw_attr_group);
+}
+
+static void
+claw_remove_files(struct device *dev)
+{
+ pr_debug("%s() called\n", __FUNCTION__);
+ CLAW_DBF_TEXT(2,setup,"rem_file");
+ sysfs_remove_group(&dev->kobj, &claw_attr_group);
+}
+
+/*--------------------------------------------------------------------*
+* claw_init and cleanup *
+*---------------------------------------------------------------------*/
+
+static void __exit
+claw_cleanup(void)
+{
+ unregister_cu3088_discipline(&claw_group_driver);
+ claw_unregister_debug_facility();
+ printk(KERN_INFO "claw: Driver unloaded\n");
+
+}
+
+/**
+ * Initialize module.
+ * This is called just after the module is loaded.
+ *
+ * @return 0 on success, !0 on error.
+ */
+static int __init
+claw_init(void)
+{
+ int ret = 0;
+ printk(KERN_INFO "claw: starting driver "
+#ifdef MODULE
+ "module "
+#else
+ "compiled into kernel "
+#endif
+ " $Revision: 1.35 $ $Date: 2005/03/24 12:25:38 $ \n");
+
+
+#ifdef FUNCTRACE
+ printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
+#endif
+ ret = claw_register_debug_facility();
+ if (ret) {
+ printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
+ __FUNCTION__,ret);
+ return ret;
+ }
+ CLAW_DBF_TEXT(2,setup,"init_mod");
+ ret = register_cu3088_discipline(&claw_group_driver);
+ if (ret) {
+ claw_unregister_debug_facility();
+ printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
+ __FUNCTION__,ret);
+ }
+#ifdef FUNCTRACE
+ printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
+#endif
+ return ret;
+}
+
+module_init(claw_init);
+module_exit(claw_cleanup);
+
+
+
+/*--------------------------------------------------------------------*
+* End of File *
+*---------------------------------------------------------------------*/
+
+
git://git.onelab.eu / linux-2.6.git / blobdiff