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gerrit-public.fairphone.software / kernel / msm-4.19 / a92b7b80579fe68fe229892815c750f6652eb6a9 / . / drivers / s390 / net / claw.c
blob: 60440dbe3a2764168056bf2b48acbaaf4d64cecb [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
5 * $Revision: 1.35 $ $Date: 2005/03/24 12:25:38 $
6 *
7 * Linux fo zSeries version
8 * Copyright (C) 2002,2005 IBM Corporation
9 * Author(s) Original code written by:
10 * Kazuo Iimura (iimura@jp.ibm.com)
11 * Rewritten by
12 * Andy Richter (richtera@us.ibm.com)
13 * Marc Price (mwprice@us.ibm.com)
14 *
15 * sysfs parms:
16 * group x.x.rrrr,x.x.wwww
17 * read_buffer nnnnnnn
18 * write_buffer nnnnnn
19 * host_name aaaaaaaa
20 * adapter_name aaaaaaaa
21 * api_type aaaaaaaa
22 *
23 * eg.
24 * group 0.0.0200 0.0.0201
25 * read_buffer 25
26 * write_buffer 20
27 * host_name LINUX390
28 * adapter_name RS6K
29 * api_type TCPIP
30 *
31 * where
32 *
33 * The device id is decided by the order entries
34 * are added to the group the first is claw0 the second claw1
35 * up to CLAW_MAX_DEV
36 *
37 * rrrr - the first of 2 consecutive device addresses used for the
38 * CLAW protocol.
39 * The specified address is always used as the input (Read)
40 * channel and the next address is used as the output channel.
41 *
42 * wwww - the second of 2 consecutive device addresses used for
43 * the CLAW protocol.
44 * The specified address is always used as the output
45 * channel and the previous address is used as the input channel.
46 *
47 * read_buffer - specifies number of input buffers to allocate.
48 * write_buffer - specifies number of output buffers to allocate.
49 * host_name - host name
50 * adaptor_name - adaptor name
51 * api_type - API type TCPIP or API will be sent and expected
52 * as ws_name
53 *
54 * Note the following requirements:
55 * 1) host_name must match the configured adapter_name on the remote side
56 * 2) adaptor_name must match the configured host name on the remote side
57 *
58 * Change History
59 * 1.00 Initial release shipped
60 * 1.10 Changes for Buffer allocation
61 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
62 * 1.25 Added Packing support
63 */
64#include <asm/bitops.h>
65#include <asm/ccwdev.h>
66#include <asm/ccwgroup.h>
67#include <asm/debug.h>
68#include <asm/idals.h>
69#include <asm/io.h>
70
71#include <linux/ctype.h>
72#include <linux/delay.h>
73#include <linux/errno.h>
74#include <linux/if_arp.h>
75#include <linux/init.h>
76#include <linux/interrupt.h>
77#include <linux/ip.h>
78#include <linux/kernel.h>
79#include <linux/module.h>
80#include <linux/netdevice.h>
81#include <linux/etherdevice.h>
82#include <linux/proc_fs.h>
83#include <linux/sched.h>
84#include <linux/signal.h>
85#include <linux/skbuff.h>
86#include <linux/slab.h>
87#include <linux/string.h>
88#include <linux/tcp.h>
89#include <linux/timer.h>
90#include <linux/types.h>
91#include <linux/version.h>
92
93#include "cu3088.h"
94#include "claw.h"
95
96MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
97MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
98 "Copyright 2000,2005 IBM Corporation\n");
99MODULE_LICENSE("GPL");
100
101/* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE options:
102 DEBUGMSG - Enables output of various debug messages in the code
103 IOTRACE - Enables output of CCW and other IO related traces
104 FUNCTRACE - Enables output of function entry/exit trace
105 Define any combination of above options to enable tracing
106
107 CLAW also uses the s390dbf file system see claw_trace and claw_setup
108*/
109
110/* following enables tracing */
111//#define DEBUGMSG
112//#define IOTRACE
113//#define FUNCTRACE
114
115#ifdef DEBUGMSG
116#define DEBUG
117#endif
118
119#ifdef IOTRACE
120#define DEBUG
121#endif
122
123#ifdef FUNCTRACE
124#define DEBUG
125#endif
126
127 char debug_buffer[255];
128/**
129 * Debug Facility Stuff
130 */
131static debug_info_t *claw_dbf_setup;
132static debug_info_t *claw_dbf_trace;
133
134/**
135 * CLAW Debug Facility functions
136 */
137static void
138claw_unregister_debug_facility(void)
139{
140 if (claw_dbf_setup)
141 debug_unregister(claw_dbf_setup);
142 if (claw_dbf_trace)
143 debug_unregister(claw_dbf_trace);
144}
145
146static int
147claw_register_debug_facility(void)
148{
Michael Holzheu66a464d2005-06-25 14:55:33 -0700[diff] [blame]149 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
150 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]151 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
152 printk(KERN_WARNING "Not enough memory for debug facility.\n");
153 claw_unregister_debug_facility();
154 return -ENOMEM;
155 }
156 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
157 debug_set_level(claw_dbf_setup, 2);
158 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
159 debug_set_level(claw_dbf_trace, 2);
160 return 0;
161}
162
163static inline void
164claw_set_busy(struct net_device *dev)
165{
166 ((struct claw_privbk *) dev->priv)->tbusy=1;
167 eieio();
168}
169
170static inline void
171claw_clear_busy(struct net_device *dev)
172{
173 clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
174 netif_wake_queue(dev);
175 eieio();
176}
177
178static inline int
179claw_check_busy(struct net_device *dev)
180{
181 eieio();
182 return ((struct claw_privbk *) dev->priv)->tbusy;
183}
184
185static inline void
186claw_setbit_busy(int nr,struct net_device *dev)
187{
188 netif_stop_queue(dev);
189 set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
190}
191
192static inline void
193claw_clearbit_busy(int nr,struct net_device *dev)
194{
195 clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
196 netif_wake_queue(dev);
197}
198
199static inline int
200claw_test_and_setbit_busy(int nr,struct net_device *dev)
201{
202 netif_stop_queue(dev);
203 return test_and_set_bit(nr,
204 (void *)&(((struct claw_privbk *) dev->priv)->tbusy));
205}
206
207
208/* Functions for the DEV methods */
209
210static int claw_probe(struct ccwgroup_device *cgdev);
211static void claw_remove_device(struct ccwgroup_device *cgdev);
212static void claw_purge_skb_queue(struct sk_buff_head *q);
213static int claw_new_device(struct ccwgroup_device *cgdev);
214static int claw_shutdown_device(struct ccwgroup_device *cgdev);
215static int claw_tx(struct sk_buff *skb, struct net_device *dev);
216static int claw_change_mtu( struct net_device *dev, int new_mtu);
217static int claw_open(struct net_device *dev);
218static void claw_irq_handler(struct ccw_device *cdev,
219 unsigned long intparm, struct irb *irb);
220static void claw_irq_tasklet ( unsigned long data );
221static int claw_release(struct net_device *dev);
222static void claw_write_retry ( struct chbk * p_ch );
223static void claw_write_next ( struct chbk * p_ch );
224static void claw_timer ( struct chbk * p_ch );
225
226/* Functions */
227static int add_claw_reads(struct net_device *dev,
228 struct ccwbk* p_first, struct ccwbk* p_last);
229static void inline ccw_check_return_code (struct ccw_device *cdev,
230 int return_code);
231static void inline ccw_check_unit_check (struct chbk * p_ch,
232 unsigned char sense );
233static int find_link(struct net_device *dev, char *host_name, char *ws_name );
234static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
235static int init_ccw_bk(struct net_device *dev);
236static void probe_error( struct ccwgroup_device *cgdev);
237static struct net_device_stats *claw_stats(struct net_device *dev);
238static int inline pages_to_order_of_mag(int num_of_pages);
239static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
240#ifdef DEBUG
241static void dumpit (char *buf, int len);
242#endif
243/* sysfs Functions */
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]244static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
245static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]246 const char *buf, size_t count);
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]247static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
248static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]249 const char *buf, size_t count);
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]250static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
251static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]252 const char *buf, size_t count);
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]253static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
254static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]255 const char *buf, size_t count);
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]256static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
257static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]258 const char *buf, size_t count);
259static int claw_add_files(struct device *dev);
260static void claw_remove_files(struct device *dev);
261
262/* Functions for System Validate */
263static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
264static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
265 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
266static int claw_snd_conn_req(struct net_device *dev, __u8 link);
267static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
268static int claw_snd_sys_validate_rsp(struct net_device *dev,
269 struct clawctl * p_ctl, __u32 return_code);
270static int claw_strt_conn_req(struct net_device *dev );
271static void claw_strt_read ( struct net_device *dev, int lock );
272static void claw_strt_out_IO( struct net_device *dev );
273static void claw_free_wrt_buf( struct net_device *dev );
274
275/* Functions for unpack reads */
276static void unpack_read (struct net_device *dev );
277
278/* ccwgroup table */
279
280static struct ccwgroup_driver claw_group_driver = {
281 .owner = THIS_MODULE,
282 .name = "claw",
283 .max_slaves = 2,
284 .driver_id = 0xC3D3C1E6,
285 .probe = claw_probe,
286 .remove = claw_remove_device,
287 .set_online = claw_new_device,
288 .set_offline = claw_shutdown_device,
289};
290
291/*
292*
293* Key functions
294*/
295
296/*----------------------------------------------------------------*
297 * claw_probe *
298 * this function is called for each CLAW device. *
299 *----------------------------------------------------------------*/
300static int
301claw_probe(struct ccwgroup_device *cgdev)
302{
303 int rc;
304 struct claw_privbk *privptr=NULL;
305
306#ifdef FUNCTRACE
307 printk(KERN_INFO "%s Enter\n",__FUNCTION__);
308#endif
309 CLAW_DBF_TEXT(2,setup,"probe");
310 if (!get_device(&cgdev->dev))
311 return -ENODEV;
312#ifdef DEBUGMSG
313 printk(KERN_INFO "claw: variable cgdev =\n");
314 dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
315#endif
316 privptr = kmalloc(sizeof(struct claw_privbk), GFP_KERNEL);
317 if (privptr == NULL) {
318 probe_error(cgdev);
319 put_device(&cgdev->dev);
320 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
321 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
322 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
323 return -ENOMEM;
324 }
325 memset(privptr,0x00,sizeof(struct claw_privbk));
326 privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
327 privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
328 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
329 probe_error(cgdev);
330 put_device(&cgdev->dev);
331 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
332 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
333 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
334 return -ENOMEM;
335 }
336 memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
337 memset(privptr->p_env, 0x00, sizeof(struct claw_env));
338 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
339 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
340 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
341 privptr->p_env->packing = 0;
342 privptr->p_env->write_buffers = 5;
343 privptr->p_env->read_buffers = 5;
344 privptr->p_env->read_size = CLAW_FRAME_SIZE;
345 privptr->p_env->write_size = CLAW_FRAME_SIZE;
346 rc = claw_add_files(&cgdev->dev);
347 if (rc) {
348 probe_error(cgdev);
349 put_device(&cgdev->dev);
350 printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
351 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
352 CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
353 return rc;
354 }
355 printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
356 privptr->p_env->p_priv = privptr;
357 cgdev->cdev[0]->handler = claw_irq_handler;
358 cgdev->cdev[1]->handler = claw_irq_handler;
359 cgdev->dev.driver_data = privptr;
360#ifdef FUNCTRACE
361 printk(KERN_INFO "claw:%s exit on line %d, "
362 "rc = 0\n",__FUNCTION__,__LINE__);
363#endif
364 CLAW_DBF_TEXT(2,setup,"prbext 0");
365
366 return 0;
367} /* end of claw_probe */
368
369/*-------------------------------------------------------------------*
370 * claw_tx *
371 *-------------------------------------------------------------------*/
372
373static int
374claw_tx(struct sk_buff *skb, struct net_device *dev)
375{
376 int rc;
377 struct claw_privbk *privptr=dev->priv;
378 unsigned long saveflags;
379 struct chbk *p_ch;
380
381#ifdef FUNCTRACE
382 printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
383#endif
384 CLAW_DBF_TEXT(4,trace,"claw_tx");
385 p_ch=&privptr->channel[WRITE];
386 if (skb == NULL) {
387 printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
388 dev->name);
389 privptr->stats.tx_dropped++;
390#ifdef FUNCTRACE
391 printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
392 dev->name,__FUNCTION__, __LINE__);
393#endif
394 CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
395 return -EIO;
396 }
397
398#ifdef IOTRACE
399 printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
400 dumpit((char *) skb, sizeof(struct sk_buff));
401 printk(KERN_INFO "%s: variable dev=\n",dev->name);
402 dumpit((char *) dev, sizeof(struct net_device));
403#endif
404 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
405 rc=claw_hw_tx( skb, dev, 1 );
406 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
407#ifdef FUNCTRACE
408 printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
409 dev->name, __FUNCTION__, __LINE__, rc);
410#endif
411 CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
412 return rc;
413} /* end of claw_tx */
414
415/*------------------------------------------------------------------*
416 * pack the collect queue into an skb and return it *
417 * If not packing just return the top skb from the queue *
418 *------------------------------------------------------------------*/
419
420static struct sk_buff *
421claw_pack_skb(struct claw_privbk *privptr)
422{
423 struct sk_buff *new_skb,*held_skb;
424 struct chbk *p_ch = &privptr->channel[WRITE];
425 struct claw_env *p_env = privptr->p_env;
426 int pkt_cnt,pk_ind,so_far;
427
428 new_skb = NULL; /* assume no dice */
429 pkt_cnt = 0;
430 CLAW_DBF_TEXT(4,trace,"PackSKBe");
431 if (skb_queue_len(&p_ch->collect_queue) > 0) {
432 /* some data */
433 held_skb = skb_dequeue(&p_ch->collect_queue);
434 if (p_env->packing != DO_PACKED)
435 return held_skb;
436 if (held_skb)
437 atomic_dec(&held_skb->users);
438 else
439 return NULL;
440 /* get a new SKB we will pack at least one */
441 new_skb = dev_alloc_skb(p_env->write_size);
442 if (new_skb == NULL) {
443 atomic_inc(&held_skb->users);
444 skb_queue_head(&p_ch->collect_queue,held_skb);
445 return NULL;
446 }
447 /* we have packed packet and a place to put it */
448 pk_ind = 1;
449 so_far = 0;
450 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
451 while ((pk_ind) && (held_skb != NULL)) {
452 if (held_skb->len+so_far <= p_env->write_size-8) {
453 memcpy(skb_put(new_skb,held_skb->len),
454 held_skb->data,held_skb->len);
455 privptr->stats.tx_packets++;
456 so_far += held_skb->len;
457 pkt_cnt++;
458 dev_kfree_skb_irq(held_skb);
459 held_skb = skb_dequeue(&p_ch->collect_queue);
460 if (held_skb)
461 atomic_dec(&held_skb->users);
462 } else {
463 pk_ind = 0;
464 atomic_inc(&held_skb->users);
465 skb_queue_head(&p_ch->collect_queue,held_skb);
466 }
467 }
468#ifdef IOTRACE
469 printk(KERN_INFO "%s: %s() Packed %d len %d\n",
470 p_env->ndev->name,
471 __FUNCTION__,pkt_cnt,new_skb->len);
472#endif
473 }
474 CLAW_DBF_TEXT(4,trace,"PackSKBx");
475 return new_skb;
476}
477
478/*-------------------------------------------------------------------*
479 * claw_change_mtu *
480 * *
481 *-------------------------------------------------------------------*/
482
483static int
484claw_change_mtu(struct net_device *dev, int new_mtu)
485{
486 struct claw_privbk *privptr=dev->priv;
487 int buff_size;
488#ifdef FUNCTRACE
489 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
490#endif
491#ifdef DEBUGMSG
492 printk(KERN_INFO "variable dev =\n");
493 dumpit((char *) dev, sizeof(struct net_device));
494 printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
495#endif
496 CLAW_DBF_TEXT(4,trace,"setmtu");
497 buff_size = privptr->p_env->write_size;
498 if ((new_mtu < 60) || (new_mtu > buff_size)) {
499#ifdef FUNCTRACE
500 printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
501 dev->name,
502 __FUNCTION__, __LINE__);
503#endif
504 return -EINVAL;
505 }
506 dev->mtu = new_mtu;
507#ifdef FUNCTRACE
508 printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
509 __FUNCTION__, __LINE__);
510#endif
511 return 0;
512} /* end of claw_change_mtu */
513
514
515/*-------------------------------------------------------------------*
516 * claw_open *
517 * *
518 *-------------------------------------------------------------------*/
519static int
520claw_open(struct net_device *dev)
521{
522
523 int rc;
524 int i;
525 unsigned long saveflags=0;
526 unsigned long parm;
527 struct claw_privbk *privptr;
528 DECLARE_WAITQUEUE(wait, current);
529 struct timer_list timer;
530 struct ccwbk *p_buf;
531
532#ifdef FUNCTRACE
533 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
534#endif
535 CLAW_DBF_TEXT(4,trace,"open");
536 if (!dev | (dev->name[0] == 0x00)) {
537 CLAW_DBF_TEXT(2,trace,"BadDev");
538 printk(KERN_WARNING "claw: Bad device at open failing \n");
539 return -ENODEV;
540 }
541 privptr = (struct claw_privbk *)dev->priv;
542 /* allocate and initialize CCW blocks */
543 if (privptr->buffs_alloc == 0) {
544 rc=init_ccw_bk(dev);
545 if (rc) {
546 printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
547 dev->name,
548 __FUNCTION__, __LINE__);
549 CLAW_DBF_TEXT(2,trace,"openmem");
550 return -ENOMEM;
551 }
552 }
553 privptr->system_validate_comp=0;
554 privptr->release_pend=0;
555 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
556 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
557 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
558 privptr->p_env->packing=PACKING_ASK;
559 } else {
560 privptr->p_env->packing=0;
561 privptr->p_env->read_size=CLAW_FRAME_SIZE;
562 privptr->p_env->write_size=CLAW_FRAME_SIZE;
563 }
564 claw_set_busy(dev);
565 tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
566 (unsigned long) &privptr->channel[READ]);
567 for ( i = 0; i < 2; i++) {
568 CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
569 init_waitqueue_head(&privptr->channel[i].wait);
570 /* skb_queue_head_init(&p_ch->io_queue); */
571 if (i == WRITE)
572 skb_queue_head_init(
573 &privptr->channel[WRITE].collect_queue);
574 privptr->channel[i].flag_a = 0;
575 privptr->channel[i].IO_active = 0;
576 privptr->channel[i].flag &= ~CLAW_TIMER;
577 init_timer(&timer);
578 timer.function = (void *)claw_timer;
579 timer.data = (unsigned long)(&privptr->channel[i]);
580 timer.expires = jiffies + 15*HZ;
581 add_timer(&timer);
582 spin_lock_irqsave(get_ccwdev_lock(
583 privptr->channel[i].cdev), saveflags);
584 parm = (unsigned long) &privptr->channel[i];
585 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
586 rc = 0;
587 add_wait_queue(&privptr->channel[i].wait, &wait);
588 rc = ccw_device_halt(
589 (struct ccw_device *)privptr->channel[i].cdev,parm);
590 set_current_state(TASK_INTERRUPTIBLE);
591 spin_unlock_irqrestore(
592 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
593 schedule();
594 set_current_state(TASK_RUNNING);
595 remove_wait_queue(&privptr->channel[i].wait, &wait);
596 if(rc != 0)
597 ccw_check_return_code(privptr->channel[i].cdev, rc);
598 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
599 del_timer(&timer);
600 }
601 if ((((privptr->channel[READ].last_dstat |
602 privptr->channel[WRITE].last_dstat) &
603 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
604 (((privptr->channel[READ].flag |
605 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
606#ifdef DEBUGMSG
607 printk(KERN_INFO "%s: channel problems during open - read:"
608 " %02x - write: %02x\n",
609 dev->name,
610 privptr->channel[READ].last_dstat,
611 privptr->channel[WRITE].last_dstat);
612#endif
613 printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
614 CLAW_DBF_TEXT(2,trace,"notrdy");
615
616 for ( i = 0; i < 2; i++) {
617 spin_lock_irqsave(
618 get_ccwdev_lock(privptr->channel[i].cdev),
619 saveflags);
620 parm = (unsigned long) &privptr->channel[i];
621 privptr->channel[i].claw_state = CLAW_STOP;
622 rc = ccw_device_halt(
623 (struct ccw_device *)&privptr->channel[i].cdev,
624 parm);
625 spin_unlock_irqrestore(
626 get_ccwdev_lock(privptr->channel[i].cdev),
627 saveflags);
628 if (rc != 0) {
629 ccw_check_return_code(
630 privptr->channel[i].cdev, rc);
631 }
632 }
633 free_pages((unsigned long)privptr->p_buff_ccw,
634 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
635 if (privptr->p_env->read_size < PAGE_SIZE) {
636 free_pages((unsigned long)privptr->p_buff_read,
637 (int)pages_to_order_of_mag(
638 privptr->p_buff_read_num));
639 }
640 else {
641 p_buf=privptr->p_read_active_first;
642 while (p_buf!=NULL) {
643 free_pages((unsigned long)p_buf->p_buffer,
644 (int)pages_to_order_of_mag(
645 privptr->p_buff_pages_perread ));
646 p_buf=p_buf->next;
647 }
648 }
649 if (privptr->p_env->write_size < PAGE_SIZE ) {
650 free_pages((unsigned long)privptr->p_buff_write,
651 (int)pages_to_order_of_mag(
652 privptr->p_buff_write_num));
653 }
654 else {
655 p_buf=privptr->p_write_active_first;
656 while (p_buf!=NULL) {
657 free_pages((unsigned long)p_buf->p_buffer,
658 (int)pages_to_order_of_mag(
659 privptr->p_buff_pages_perwrite ));
660 p_buf=p_buf->next;
661 }
662 }
663 privptr->buffs_alloc = 0;
664 privptr->channel[READ].flag= 0x00;
665 privptr->channel[WRITE].flag = 0x00;
666 privptr->p_buff_ccw=NULL;
667 privptr->p_buff_read=NULL;
668 privptr->p_buff_write=NULL;
669 claw_clear_busy(dev);
670#ifdef FUNCTRACE
671 printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
672 dev->name,__FUNCTION__,__LINE__);
673#endif
674 CLAW_DBF_TEXT(2,trace,"open EIO");
675 return -EIO;
676 }
677
678 /* Send SystemValidate command */
679
680 claw_clear_busy(dev);
681
682#ifdef FUNCTRACE
683 printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
684 dev->name,__FUNCTION__,__LINE__);
685#endif
686 CLAW_DBF_TEXT(4,trace,"openok");
687 return 0;
688} /* end of claw_open */
689
690/*-------------------------------------------------------------------*
691* *
692* claw_irq_handler *
693* *
694*--------------------------------------------------------------------*/
695static void
696claw_irq_handler(struct ccw_device *cdev,
697 unsigned long intparm, struct irb *irb)
698{
699 struct chbk *p_ch = NULL;
700 struct claw_privbk *privptr = NULL;
701 struct net_device *dev = NULL;
702 struct claw_env *p_env;
703 struct chbk *p_ch_r=NULL;
704
705
706#ifdef FUNCTRACE
707 printk(KERN_INFO "%s enter \n",__FUNCTION__);
708#endif
709 CLAW_DBF_TEXT(4,trace,"clawirq");
710 /* Bypass all 'unsolicited interrupts' */
711 if (!cdev->dev.driver_data) {
712 printk(KERN_WARNING "claw: unsolicited interrupt for device:"
713 "%s received c-%02x d-%02x\n",
714 cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
715#ifdef FUNCTRACE
716 printk(KERN_INFO "claw: %s() "
717 "exit on line %d\n",__FUNCTION__,__LINE__);
718#endif
719 CLAW_DBF_TEXT(2,trace,"badirq");
720 return;
721 }
722 privptr = (struct claw_privbk *)cdev->dev.driver_data;
723
724 /* Try to extract channel from driver data. */
725 if (privptr->channel[READ].cdev == cdev)
726 p_ch = &privptr->channel[READ];
727 else if (privptr->channel[WRITE].cdev == cdev)
728 p_ch = &privptr->channel[WRITE];
729 else {
730 printk(KERN_WARNING "claw: Can't determine channel for "
731 "interrupt, device %s\n", cdev->dev.bus_id);
732 CLAW_DBF_TEXT(2,trace,"badchan");
733 return;
734 }
735 CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
736
737 dev = (struct net_device *) (p_ch->ndev);
738 p_env=privptr->p_env;
739
740#ifdef IOTRACE
741 printk(KERN_INFO "%s: interrupt for device: %04x "
742 "received c-%02x d-%02x state-%02x\n",
743 dev->name, p_ch->devno, irb->scsw.cstat,
744 irb->scsw.dstat, p_ch->claw_state);
745#endif
746
747 /* Copy interruption response block. */
748 memcpy(p_ch->irb, irb, sizeof(struct irb));
749
750 /* Check for good subchannel return code, otherwise error message */
751 if (irb->scsw.cstat && !(irb->scsw.cstat & SCHN_STAT_PCI)) {
752 printk(KERN_INFO "%s: subchannel check for device: %04x -"
753 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
754 dev->name, p_ch->devno,
755 irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
756#ifdef IOTRACE
757 dumpit((char *)irb,sizeof(struct irb));
758 dumpit((char *)(unsigned long)irb->scsw.cpa,
759 sizeof(struct ccw1));
760#endif
761#ifdef FUNCTRACE
762 printk(KERN_INFO "%s:%s Exit on line %d\n",
763 dev->name,__FUNCTION__,__LINE__);
764#endif
765 CLAW_DBF_TEXT(2,trace,"chanchk");
766 /* return; */
767 }
768
769 /* Check the reason-code of a unit check */
770 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
771 ccw_check_unit_check(p_ch, irb->ecw[0]);
772 }
773
774 /* State machine to bring the connection up, down and to restart */
775 p_ch->last_dstat = irb->scsw.dstat;
776
777 switch (p_ch->claw_state) {
778 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
779#ifdef DEBUGMSG
780 printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
781#endif
782 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
783 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
784 (p_ch->irb->scsw.stctl ==
785 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
786#ifdef FUNCTRACE
787 printk(KERN_INFO "%s:%s Exit on line %d\n",
788 dev->name,__FUNCTION__,__LINE__);
789#endif
790 return;
791 }
792 wake_up(&p_ch->wait); /* wake up claw_release */
793
794#ifdef DEBUGMSG
795 printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
796#endif
797#ifdef FUNCTRACE
798 printk(KERN_INFO "%s:%s Exit on line %d\n",
799 dev->name,__FUNCTION__,__LINE__);
800#endif
801 CLAW_DBF_TEXT(4,trace,"stop");
802 return;
803
804 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
805#ifdef DEBUGMSG
806 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
807 dev->name);
808#endif
809 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
810 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
811 (p_ch->irb->scsw.stctl ==
812 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
813#ifdef FUNCTRACE
814 printk(KERN_INFO "%s:%s Exit on line %d\n",
815 dev->name,__FUNCTION__,__LINE__);
816#endif
817 CLAW_DBF_TEXT(4,trace,"haltio");
818 return;
819 }
820 if (p_ch->flag == CLAW_READ) {
821 p_ch->claw_state = CLAW_START_READ;
822 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
823 }
824 else
825 if (p_ch->flag == CLAW_WRITE) {
826 p_ch->claw_state = CLAW_START_WRITE;
827 /* send SYSTEM_VALIDATE */
828 claw_strt_read(dev, LOCK_NO);
829 claw_send_control(dev,
830 SYSTEM_VALIDATE_REQUEST,
831 0, 0, 0,
832 p_env->host_name,
833 p_env->adapter_name );
834 } else {
835 printk(KERN_WARNING "claw: unsolicited "
836 "interrupt for device:"
837 "%s received c-%02x d-%02x\n",
838 cdev->dev.bus_id,
839 irb->scsw.cstat,
840 irb->scsw.dstat);
841 return;
842 }
843#ifdef DEBUGMSG
844 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
845 dev->name);
846#endif
847#ifdef FUNCTRACE
848 printk(KERN_INFO "%s:%s Exit on line %d\n",
849 dev->name,__FUNCTION__,__LINE__);
850#endif
851 CLAW_DBF_TEXT(4,trace,"haltio");
852 return;
853 case CLAW_START_READ:
854 CLAW_DBF_TEXT(4,trace,"ReadIRQ");
855 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
856 clear_bit(0, (void *)&p_ch->IO_active);
857 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
858 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
859 (p_ch->irb->ecw[0]) == 0)
860 {
861 privptr->stats.rx_errors++;
862 printk(KERN_INFO "%s: Restart is "
863 "required after remote "
864 "side recovers \n",
865 dev->name);
866 }
867#ifdef FUNCTRACE
868 printk(KERN_INFO "%s:%s Exit on line %d\n",
869 dev->name,__FUNCTION__,__LINE__);
870#endif
871 CLAW_DBF_TEXT(4,trace,"notrdy");
872 return;
873 }
874 if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
875 (p_ch->irb->scsw.dstat==0)) {
876 if (test_and_set_bit(CLAW_BH_ACTIVE,
877 (void *)&p_ch->flag_a) == 0) {
878 tasklet_schedule(&p_ch->tasklet);
879 }
880 else {
881 CLAW_DBF_TEXT(4,trace,"PCINoBH");
882 }
883#ifdef FUNCTRACE
884 printk(KERN_INFO "%s:%s Exit on line %d\n",
885 dev->name,__FUNCTION__,__LINE__);
886#endif
887 CLAW_DBF_TEXT(4,trace,"PCI_read");
888 return;
889 }
890 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
891 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
892 (p_ch->irb->scsw.stctl ==
893 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
894#ifdef FUNCTRACE
895 printk(KERN_INFO "%s:%s Exit on line %d\n",
896 dev->name,__FUNCTION__,__LINE__);
897#endif
898 CLAW_DBF_TEXT(4,trace,"SPend_rd");
899 return;
900 }
901 clear_bit(0, (void *)&p_ch->IO_active);
902 claw_clearbit_busy(TB_RETRY,dev);
903 if (test_and_set_bit(CLAW_BH_ACTIVE,
904 (void *)&p_ch->flag_a) == 0) {
905 tasklet_schedule(&p_ch->tasklet);
906 }
907 else {
908 CLAW_DBF_TEXT(4,trace,"RdBHAct");
909 }
910
911#ifdef DEBUGMSG
912 printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
913 dev->name);
914#endif
915#ifdef FUNCTRACE
916 printk(KERN_INFO "%s:%s Exit on line %d\n",
917 dev->name,__FUNCTION__,__LINE__);
918#endif
919 CLAW_DBF_TEXT(4,trace,"RdIRQXit");
920 return;
921 case CLAW_START_WRITE:
922 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
923 printk(KERN_INFO "%s: Unit Check Occured in "
924 "write channel\n",dev->name);
925 clear_bit(0, (void *)&p_ch->IO_active);
926 if (p_ch->irb->ecw[0] & 0x80 ) {
927 printk(KERN_INFO "%s: Resetting Event "
928 "occurred:\n",dev->name);
929 init_timer(&p_ch->timer);
930 p_ch->timer.function =
931 (void *)claw_write_retry;
932 p_ch->timer.data = (unsigned long)p_ch;
933 p_ch->timer.expires = jiffies + 10*HZ;
934 add_timer(&p_ch->timer);
935 printk(KERN_INFO "%s: write connection "
936 "restarting\n",dev->name);
937 }
938#ifdef FUNCTRACE
939 printk(KERN_INFO "%s:%s Exit on line %d\n",
940 dev->name,__FUNCTION__,__LINE__);
941#endif
942 CLAW_DBF_TEXT(4,trace,"rstrtwrt");
943 return;
944 }
945 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
946 clear_bit(0, (void *)&p_ch->IO_active);
947 printk(KERN_INFO "%s: Unit Exception "
948 "Occured in write channel\n",
949 dev->name);
950 }
951 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
952 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
953 (p_ch->irb->scsw.stctl ==
954 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
955#ifdef FUNCTRACE
956 printk(KERN_INFO "%s:%s Exit on line %d\n",
957 dev->name,__FUNCTION__,__LINE__);
958#endif
959 CLAW_DBF_TEXT(4,trace,"writeUE");
960 return;
961 }
962 clear_bit(0, (void *)&p_ch->IO_active);
963 if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
964 claw_write_next(p_ch);
965 claw_clearbit_busy(TB_TX,dev);
966 claw_clear_busy(dev);
967 }
968 p_ch_r=(struct chbk *)&privptr->channel[READ];
969 if (test_and_set_bit(CLAW_BH_ACTIVE,
970 (void *)&p_ch_r->flag_a) == 0) {
971 tasklet_schedule(&p_ch_r->tasklet);
972 }
973
974#ifdef DEBUGMSG
975 printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
976 dev->name);
977#endif
978#ifdef FUNCTRACE
979 printk(KERN_INFO "%s:%s Exit on line %d\n",
980 dev->name,__FUNCTION__,__LINE__);
981#endif
982 CLAW_DBF_TEXT(4,trace,"StWtExit");
983 return;
984 default:
985 printk(KERN_WARNING "%s: wrong selection code - irq "
986 "state=%d\n",dev->name,p_ch->claw_state);
987#ifdef FUNCTRACE
988 printk(KERN_INFO "%s:%s Exit on line %d\n",
989 dev->name,__FUNCTION__,__LINE__);
990#endif
991 CLAW_DBF_TEXT(2,trace,"badIRQ");
992 return;
993 }
994
995} /* end of claw_irq_handler */
996
997
998/*-------------------------------------------------------------------*
999* claw_irq_tasklet *
1000* *
1001*--------------------------------------------------------------------*/
1002static void
1003claw_irq_tasklet ( unsigned long data )
1004{
1005 struct chbk * p_ch;
1006 struct net_device *dev;
1007 struct claw_privbk * privptr;
1008
1009 p_ch = (struct chbk *) data;
1010 dev = (struct net_device *)p_ch->ndev;
1011#ifdef FUNCTRACE
1012 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1013#endif
1014#ifdef DEBUGMSG
1015 printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
1016 dumpit((char *) p_ch, sizeof(struct chbk));
1017#endif
1018 CLAW_DBF_TEXT(4,trace,"IRQtask");
1019
1020 privptr = (struct claw_privbk *) dev->priv;
1021
1022#ifdef DEBUGMSG
1023 printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
1024 dev->name, p_ch->claw_state);
1025#endif
1026
1027 unpack_read(dev);
1028 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
1029 CLAW_DBF_TEXT(4,trace,"TskletXt");
1030#ifdef FUNCTRACE
1031 printk(KERN_INFO "%s:%s Exit on line %d\n",
1032 dev->name,__FUNCTION__,__LINE__);
1033#endif
1034 return;
1035} /* end of claw_irq_bh */
1036
1037/*-------------------------------------------------------------------*
1038* claw_release *
1039* *
1040*--------------------------------------------------------------------*/
1041static int
1042claw_release(struct net_device *dev)
1043{
1044 int rc;
1045 int i;
1046 unsigned long saveflags;
1047 unsigned long parm;
1048 struct claw_privbk *privptr;
1049 DECLARE_WAITQUEUE(wait, current);
1050 struct ccwbk* p_this_ccw;
1051 struct ccwbk* p_buf;
1052
1053 if (!dev)
1054 return 0;
1055 privptr = (struct claw_privbk *) dev->priv;
1056 if (!privptr)
1057 return 0;
1058#ifdef FUNCTRACE
1059 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1060#endif
1061 CLAW_DBF_TEXT(4,trace,"release");
1062#ifdef DEBUGMSG
1063 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1064 dumpit((char *) dev, sizeof(struct net_device));
1065 printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
1066 printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
1067#endif
1068 privptr->release_pend=1;
1069 claw_setbit_busy(TB_STOP,dev);
1070 for ( i = 1; i >=0 ; i--) {
1071 spin_lock_irqsave(
1072 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1073 /* del_timer(&privptr->channel[READ].timer); */
1074 privptr->channel[i].claw_state = CLAW_STOP;
1075 privptr->channel[i].IO_active = 0;
1076 parm = (unsigned long) &privptr->channel[i];
1077 if (i == WRITE)
1078 claw_purge_skb_queue(
1079 &privptr->channel[WRITE].collect_queue);
1080 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
1081 if (privptr->system_validate_comp==0x00) /* never opened? */
1082 init_waitqueue_head(&privptr->channel[i].wait);
1083 add_wait_queue(&privptr->channel[i].wait, &wait);
1084 set_current_state(TASK_INTERRUPTIBLE);
1085 spin_unlock_irqrestore(
1086 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1087 schedule();
1088 set_current_state(TASK_RUNNING);
1089 remove_wait_queue(&privptr->channel[i].wait, &wait);
1090 if (rc != 0) {
1091 ccw_check_return_code(privptr->channel[i].cdev, rc);
1092 }
1093 }
1094 if (privptr->pk_skb != NULL) {
1095 dev_kfree_skb(privptr->pk_skb);
1096 privptr->pk_skb = NULL;
1097 }
1098 if(privptr->buffs_alloc != 1) {
1099#ifdef FUNCTRACE
1100 printk(KERN_INFO "%s:%s Exit on line %d\n",
1101 dev->name,__FUNCTION__,__LINE__);
1102#endif
1103 CLAW_DBF_TEXT(4,trace,"none2fre");
1104 return 0;
1105 }
1106 CLAW_DBF_TEXT(4,trace,"freebufs");
1107 if (privptr->p_buff_ccw != NULL) {
1108 free_pages((unsigned long)privptr->p_buff_ccw,
1109 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
1110 }
1111 CLAW_DBF_TEXT(4,trace,"freeread");
1112 if (privptr->p_env->read_size < PAGE_SIZE) {
1113 if (privptr->p_buff_read != NULL) {
1114 free_pages((unsigned long)privptr->p_buff_read,
1115 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
1116 }
1117 }
1118 else {
1119 p_buf=privptr->p_read_active_first;
1120 while (p_buf!=NULL) {
1121 free_pages((unsigned long)p_buf->p_buffer,
1122 (int)pages_to_order_of_mag(
1123 privptr->p_buff_pages_perread ));
1124 p_buf=p_buf->next;
1125 }
1126 }
1127 CLAW_DBF_TEXT(4,trace,"freewrit");
1128 if (privptr->p_env->write_size < PAGE_SIZE ) {
1129 free_pages((unsigned long)privptr->p_buff_write,
1130 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
1131 }
1132 else {
1133 p_buf=privptr->p_write_active_first;
1134 while (p_buf!=NULL) {
1135 free_pages((unsigned long)p_buf->p_buffer,
1136 (int)pages_to_order_of_mag(
1137 privptr->p_buff_pages_perwrite ));
1138 p_buf=p_buf->next;
1139 }
1140 }
1141 CLAW_DBF_TEXT(4,trace,"clearptr");
1142 privptr->buffs_alloc = 0;
1143 privptr->p_buff_ccw=NULL;
1144 privptr->p_buff_read=NULL;
1145 privptr->p_buff_write=NULL;
1146 privptr->system_validate_comp=0;
1147 privptr->release_pend=0;
1148 /* Remove any writes that were pending and reset all reads */
1149 p_this_ccw=privptr->p_read_active_first;
1150 while (p_this_ccw!=NULL) {
1151 p_this_ccw->header.length=0xffff;
1152 p_this_ccw->header.opcode=0xff;
1153 p_this_ccw->header.flag=0x00;
1154 p_this_ccw=p_this_ccw->next;
1155 }
1156
1157 while (privptr->p_write_active_first!=NULL) {
1158 p_this_ccw=privptr->p_write_active_first;
1159 p_this_ccw->header.flag=CLAW_PENDING;
1160 privptr->p_write_active_first=p_this_ccw->next;
1161 p_this_ccw->next=privptr->p_write_free_chain;
1162 privptr->p_write_free_chain=p_this_ccw;
1163 ++privptr->write_free_count;
1164 }
1165 privptr->p_write_active_last=NULL;
1166 privptr->mtc_logical_link = -1;
1167 privptr->mtc_skipping = 1;
1168 privptr->mtc_offset=0;
1169
1170 if (((privptr->channel[READ].last_dstat |
1171 privptr->channel[WRITE].last_dstat) &
1172 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
1173 printk(KERN_WARNING "%s: channel problems during close - "
1174 "read: %02x - write: %02x\n",
1175 dev->name,
1176 privptr->channel[READ].last_dstat,
1177 privptr->channel[WRITE].last_dstat);
1178 CLAW_DBF_TEXT(2,trace,"badclose");
1179 }
1180#ifdef FUNCTRACE
1181 printk(KERN_INFO "%s:%s Exit on line %d\n",
1182 dev->name,__FUNCTION__,__LINE__);
1183#endif
1184 CLAW_DBF_TEXT(4,trace,"rlsexit");
1185 return 0;
1186} /* end of claw_release */
1187
1188
1189
1190/*-------------------------------------------------------------------*
1191* claw_write_retry *
1192* *
1193*--------------------------------------------------------------------*/
1194
1195static void
1196claw_write_retry ( struct chbk *p_ch )
1197{
1198
1199 struct net_device *dev=p_ch->ndev;
1200
1201
1202#ifdef FUNCTRACE
1203 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
1204 printk(KERN_INFO "claw: variable p_ch =\n");
1205 dumpit((char *) p_ch, sizeof(struct chbk));
1206#endif
1207 CLAW_DBF_TEXT(4,trace,"w_retry");
1208 if (p_ch->claw_state == CLAW_STOP) {
1209#ifdef FUNCTRACE
1210 printk(KERN_INFO "%s:%s Exit on line %d\n",
1211 dev->name,__FUNCTION__,__LINE__);
1212#endif
1213 return;
1214 }
1215#ifdef DEBUGMSG
1216 printk( KERN_INFO "%s:%s state-%02x\n" ,
1217 dev->name,
1218 __FUNCTION__,
1219 p_ch->claw_state);
1220#endif
1221 claw_strt_out_IO( dev );
1222#ifdef FUNCTRACE
1223 printk(KERN_INFO "%s:%s Exit on line %d\n",
1224 dev->name,__FUNCTION__,__LINE__);
1225#endif
1226 CLAW_DBF_TEXT(4,trace,"rtry_xit");
1227 return;
1228} /* end of claw_write_retry */
1229
1230
1231/*-------------------------------------------------------------------*
1232* claw_write_next *
1233* *
1234*--------------------------------------------------------------------*/
1235
1236static void
1237claw_write_next ( struct chbk * p_ch )
1238{
1239
1240 struct net_device *dev;
1241 struct claw_privbk *privptr=NULL;
1242 struct sk_buff *pk_skb;
1243 int rc;
1244
1245#ifdef FUNCTRACE
1246 printk(KERN_INFO "%s:%s Enter \n",p_ch->ndev->name,__FUNCTION__);
1247 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1248 dumpit((char *) p_ch, sizeof(struct chbk));
1249#endif
1250 CLAW_DBF_TEXT(4,trace,"claw_wrt");
1251 if (p_ch->claw_state == CLAW_STOP)
1252 return;
1253 dev = (struct net_device *) p_ch->ndev;
1254 privptr = (struct claw_privbk *) dev->priv;
1255 claw_free_wrt_buf( dev );
1256 if ((privptr->write_free_count > 0) &&
1257 (skb_queue_len(&p_ch->collect_queue) > 0)) {
1258 pk_skb = claw_pack_skb(privptr);
1259 while (pk_skb != NULL) {
1260 rc = claw_hw_tx( pk_skb, dev,1);
1261 if (privptr->write_free_count > 0) {
1262 pk_skb = claw_pack_skb(privptr);
1263 } else
1264 pk_skb = NULL;
1265 }
1266 }
1267 if (privptr->p_write_active_first!=NULL) {
1268 claw_strt_out_IO(dev);
1269 }
1270
1271#ifdef FUNCTRACE
1272 printk(KERN_INFO "%s:%s Exit on line %d\n",
1273 dev->name,__FUNCTION__,__LINE__);
1274#endif
1275 return;
1276} /* end of claw_write_next */
1277
1278/*-------------------------------------------------------------------*
1279* *
1280* claw_timer *
1281*--------------------------------------------------------------------*/
1282
1283static void
1284claw_timer ( struct chbk * p_ch )
1285{
1286#ifdef FUNCTRACE
1287 printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
1288 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1289 dumpit((char *) p_ch, sizeof(struct chbk));
1290#endif
1291 CLAW_DBF_TEXT(4,trace,"timer");
1292 p_ch->flag |= CLAW_TIMER;
1293 wake_up(&p_ch->wait);
1294#ifdef FUNCTRACE
1295 printk(KERN_INFO "%s:%s Exit on line %d\n",
1296 p_ch->ndev->name,__FUNCTION__,__LINE__);
1297#endif
1298 return;
1299} /* end of claw_timer */
1300
1301
1302/*
1303*
1304* functions
1305*/
1306
1307
1308/*-------------------------------------------------------------------*
1309* *
1310* pages_to_order_of_mag *
1311* *
1312* takes a number of pages from 1 to 512 and returns the *
1313* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1314* of magnitude get_free_pages() has an upper order of 9 *
1315*--------------------------------------------------------------------*/
1316
1317static int inline
1318pages_to_order_of_mag(int num_of_pages)
1319{
1320 int order_of_mag=1; /* assume 2 pages */
1321 int nump=2;
1322#ifdef FUNCTRACE
1323 printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
1324#endif
1325 CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
1326 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1327 /* 512 pages = 2Meg on 4k page systems */
1328 if (num_of_pages >= 512) {return 9; }
1329 /* we have two or more pages order is at least 1 */
1330 for (nump=2 ;nump <= 512;nump*=2) {
1331 if (num_of_pages <= nump)
1332 break;
1333 order_of_mag +=1;
1334 }
1335 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1336#ifdef FUNCTRACE
1337 printk(KERN_INFO "%s Exit on line %d, order = %d\n",
1338 __FUNCTION__,__LINE__, order_of_mag);
1339#endif
1340 CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
1341 return order_of_mag;
1342}
1343
1344/*-------------------------------------------------------------------*
1345* *
1346* add_claw_reads *
1347* *
1348*--------------------------------------------------------------------*/
1349static int
1350add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1351 struct ccwbk* p_last)
1352{
1353 struct claw_privbk *privptr;
1354 struct ccw1 temp_ccw;
1355 struct endccw * p_end;
1356#ifdef IOTRACE
1357 struct ccwbk* p_buf;
1358#endif
1359#ifdef FUNCTRACE
1360 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1361#endif
1362#ifdef DEBUGMSG
1363 printk(KERN_INFO "dev\n");
1364 dumpit((char *) dev, sizeof(struct net_device));
1365 printk(KERN_INFO "p_first\n");
1366 dumpit((char *) p_first, sizeof(struct ccwbk));
1367 printk(KERN_INFO "p_last\n");
1368 dumpit((char *) p_last, sizeof(struct ccwbk));
1369#endif
1370 CLAW_DBF_TEXT(4,trace,"addreads");
1371 privptr = dev->priv;
1372 p_end = privptr->p_end_ccw;
1373
1374 /* first CCW and last CCW contains a new set of read channel programs
1375 * to apend the running channel programs
1376 */
1377 if ( p_first==NULL) {
1378#ifdef FUNCTRACE
1379 printk(KERN_INFO "%s:%s Exit on line %d\n",
1380 dev->name,__FUNCTION__,__LINE__);
1381#endif
1382 CLAW_DBF_TEXT(4,trace,"addexit");
1383 return 0;
1384 }
1385
1386 /* set up ending CCW sequence for this segment */
1387 if (p_end->read1) {
1388 p_end->read1=0x00; /* second ending CCW is now active */
1389 /* reset ending CCWs and setup TIC CCWs */
1390 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1391 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1392 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1393 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1394 p_end->read2_nop2.cda=0;
1395 p_end->read2_nop2.count=1;
1396 }
1397 else {
1398 p_end->read1=0x01; /* first ending CCW is now active */
1399 /* reset ending CCWs and setup TIC CCWs */
1400 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1401 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1402 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1403 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1404 p_end->read1_nop2.cda=0;
1405 p_end->read1_nop2.count=1;
1406 }
1407
1408 if ( privptr-> p_read_active_first ==NULL ) {
1409#ifdef DEBUGMSG
1410 printk(KERN_INFO "%s:%s p_read_active_frist == NULL \n",
1411 dev->name,__FUNCTION__);
1412 printk(KERN_INFO "%s:%s Read active first/last changed \n",
1413 dev->name,__FUNCTION__);
1414#endif
1415 privptr-> p_read_active_first= p_first; /* set new first */
1416 privptr-> p_read_active_last = p_last; /* set new last */
1417 }
1418 else {
1419
1420#ifdef DEBUGMSG
1421 printk(KERN_INFO "%s:%s Read in progress \n",
1422 dev->name,__FUNCTION__);
1423#endif
1424 /* set up TIC ccw */
1425 temp_ccw.cda= (__u32)__pa(&p_first->read);
1426 temp_ccw.count=0;
1427 temp_ccw.flags=0;
1428 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1429
1430
1431 if (p_end->read1) {
1432
1433 /* first set of CCW's is chained to the new read */
1434 /* chain, so the second set is chained to the active chain. */
1435 /* Therefore modify the second set to point to the new */
1436 /* read chain set up TIC CCWs */
1437 /* make sure we update the CCW so channel doesn't fetch it */
1438 /* when it's only half done */
1439 memcpy( &p_end->read2_nop2, &temp_ccw ,
1440 sizeof(struct ccw1));
1441 privptr->p_read_active_last->r_TIC_1.cda=
1442 (__u32)__pa(&p_first->read);
1443 privptr->p_read_active_last->r_TIC_2.cda=
1444 (__u32)__pa(&p_first->read);
1445 }
1446 else {
1447 /* make sure we update the CCW so channel doesn't */
1448 /* fetch it when it is only half done */
1449 memcpy( &p_end->read1_nop2, &temp_ccw ,
1450 sizeof(struct ccw1));
1451 privptr->p_read_active_last->r_TIC_1.cda=
1452 (__u32)__pa(&p_first->read);
1453 privptr->p_read_active_last->r_TIC_2.cda=
1454 (__u32)__pa(&p_first->read);
1455 }
1456 /* chain in new set of blocks */
1457 privptr->p_read_active_last->next = p_first;
1458 privptr->p_read_active_last=p_last;
1459 } /* end of if ( privptr-> p_read_active_first ==NULL) */
1460#ifdef IOTRACE
1461 printk(KERN_INFO "%s:%s dump p_last CCW BK \n",dev->name,__FUNCTION__);
1462 dumpit((char *)p_last, sizeof(struct ccwbk));
1463 printk(KERN_INFO "%s:%s dump p_end CCW BK \n",dev->name,__FUNCTION__);
1464 dumpit((char *)p_end, sizeof(struct endccw));
1465
1466 printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
1467 dumpit((char *)p_first, sizeof(struct ccwbk));
1468 printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
1469 dev->name,__FUNCTION__);
1470 p_buf=privptr->p_read_active_first;
1471 while (p_buf!=NULL) {
1472 dumpit((char *)p_buf, sizeof(struct ccwbk));
1473 p_buf=p_buf->next;
1474 }
1475#endif
1476#ifdef FUNCTRACE
1477 printk(KERN_INFO "%s:%s Exit on line %d\n",
1478 dev->name,__FUNCTION__,__LINE__);
1479#endif
1480 CLAW_DBF_TEXT(4,trace,"addexit");
1481 return 0;
1482} /* end of add_claw_reads */
1483
1484/*-------------------------------------------------------------------*
1485 * ccw_check_return_code *
1486 * *
1487 *-------------------------------------------------------------------*/
1488
1489static void inline
1490ccw_check_return_code(struct ccw_device *cdev, int return_code)
1491{
1492#ifdef FUNCTRACE
1493 printk(KERN_INFO "%s: %s() > enter \n",
1494 cdev->dev.bus_id,__FUNCTION__);
1495#endif
1496 CLAW_DBF_TEXT(4,trace,"ccwret");
1497#ifdef DEBUGMSG
1498 printk(KERN_INFO "variable cdev =\n");
1499 dumpit((char *) cdev, sizeof(struct ccw_device));
1500 printk(KERN_INFO "variable return_code = %d\n",return_code);
1501#endif
1502 if (return_code != 0) {
1503 switch (return_code) {
1504 case -EBUSY:
1505 printk(KERN_INFO "%s: Busy !\n",
1506 cdev->dev.bus_id);
1507 break;
1508 case -ENODEV:
1509 printk(KERN_EMERG "%s: Missing device called "
1510 "for IO ENODEV\n", cdev->dev.bus_id);
1511 break;
1512 case -EIO:
1513 printk(KERN_EMERG "%s: Status pending... EIO \n",
1514 cdev->dev.bus_id);
1515 break;
1516 case -EINVAL:
1517 printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
1518 cdev->dev.bus_id);
1519 break;
1520 default:
1521 printk(KERN_EMERG "%s: Unknown error in "
1522 "Do_IO %d\n",cdev->dev.bus_id, return_code);
1523 }
1524 }
1525#ifdef FUNCTRACE
1526 printk(KERN_INFO "%s: %s() > exit on line %d\n",
1527 cdev->dev.bus_id,__FUNCTION__,__LINE__);
1528#endif
1529 CLAW_DBF_TEXT(4,trace,"ccwret");
1530} /* end of ccw_check_return_code */
1531
1532/*-------------------------------------------------------------------*
1533* ccw_check_unit_check *
1534*--------------------------------------------------------------------*/
1535
1536static void inline
1537ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1538{
1539 struct net_device *dev = p_ch->ndev;
1540
1541#ifdef FUNCTRACE
1542 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1543#endif
1544#ifdef DEBUGMSG
1545 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1546 dumpit((char *)dev, sizeof(struct net_device));
1547 printk(KERN_INFO "%s: variable sense =\n",dev->name);
1548 dumpit((char *)&sense, 2);
1549#endif
1550 CLAW_DBF_TEXT(4,trace,"unitchek");
1551
1552 printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
1553 dev->name, sense);
1554
1555 if (sense & 0x40) {
1556 if (sense & 0x01) {
1557 printk(KERN_WARNING "%s: Interface disconnect or "
1558 "Selective reset "
1559 "occurred (remote side)\n", dev->name);
1560 }
1561 else {
1562 printk(KERN_WARNING "%s: System reset occured"
1563 " (remote side)\n", dev->name);
1564 }
1565 }
1566 else if (sense & 0x20) {
1567 if (sense & 0x04) {
1568 printk(KERN_WARNING "%s: Data-streaming "
1569 "timeout)\n", dev->name);
1570 }
1571 else {
1572 printk(KERN_WARNING "%s: Data-transfer parity"
1573 " error\n", dev->name);
1574 }
1575 }
1576 else if (sense & 0x10) {
1577 if (sense & 0x20) {
1578 printk(KERN_WARNING "%s: Hardware malfunction "
1579 "(remote side)\n", dev->name);
1580 }
1581 else {
1582 printk(KERN_WARNING "%s: read-data parity error "
1583 "(remote side)\n", dev->name);
1584 }
1585 }
1586
1587#ifdef FUNCTRACE
1588 printk(KERN_INFO "%s: %s() exit on line %d\n",
1589 dev->name,__FUNCTION__,__LINE__);
1590#endif
1591} /* end of ccw_check_unit_check */
1592
1593
1594
1595/*-------------------------------------------------------------------*
1596* Dump buffer format *
1597* *
1598*--------------------------------------------------------------------*/
1599#ifdef DEBUG
1600static void
1601dumpit(char* buf, int len)
1602{
1603
1604 __u32 ct, sw, rm, dup;
1605 char *ptr, *rptr;
1606 char tbuf[82], tdup[82];
1607#if (CONFIG_ARCH_S390X)
1608 char addr[22];
1609#else
1610 char addr[12];
1611#endif
1612 char boff[12];
1613 char bhex[82], duphex[82];
1614 char basc[40];
1615
1616 sw = 0;
1617 rptr =ptr=buf;
1618 rm = 16;
1619 duphex[0] = 0x00;
1620 dup = 0;
1621 for ( ct=0; ct < len; ct++, ptr++, rptr++ ) {
1622 if (sw == 0) {
1623#if (CONFIG_ARCH_S390X)
1624 sprintf(addr, "%16.16lX",(unsigned long)rptr);
1625#else
1626 sprintf(addr, "%8.8X",(__u32)rptr);
1627#endif
1628 sprintf(boff, "%4.4X", (__u32)ct);
1629 bhex[0] = '\0';
1630 basc[0] = '\0';
1631 }
1632 if ((sw == 4) || (sw == 12)) {
1633 strcat(bhex, " ");
1634 }
1635 if (sw == 8) {
1636 strcat(bhex, " ");
1637 }
1638#if (CONFIG_ARCH_S390X)
1639 sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
1640#else
1641 sprintf(tbuf,"%2.2X", (__u32)*ptr);
1642#endif
1643 tbuf[2] = '\0';
1644 strcat(bhex, tbuf);
1645 if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
1646 basc[sw] = *ptr;
1647 }
1648 else {
1649 basc[sw] = '.';
1650 }
1651 basc[sw+1] = '\0';
1652 sw++;
1653 rm--;
1654 if (sw==16) {
1655 if ((strcmp(duphex, bhex)) !=0) {
1656 if (dup !=0) {
1657 sprintf(tdup,"Duplicate as above to"
1658 " %s", addr);
1659 printk( KERN_INFO " "
1660 " --- %s ---\n",tdup);
1661 }
1662 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1663 addr, boff, bhex, basc);
1664 dup = 0;
1665 strcpy(duphex, bhex);
1666 }
1667 else {
1668 dup++;
1669 }
1670 sw = 0;
1671 rm = 16;
1672 }
1673 } /* endfor */
1674
1675 if (sw != 0) {
1676 for ( ; rm > 0; rm--, sw++ ) {
1677 if ((sw==4) || (sw==12)) strcat(bhex, " ");
1678 if (sw==8) strcat(bhex, " ");
1679 strcat(bhex, " ");
1680 strcat(basc, " ");
1681 }
1682 if (dup !=0) {
1683 sprintf(tdup,"Duplicate as above to %s", addr);
1684 printk( KERN_INFO " --- %s ---\n",
1685 tdup);
1686 }
1687 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1688 addr, boff, bhex, basc);
1689 }
1690 else {
1691 if (dup >=1) {
1692 sprintf(tdup,"Duplicate as above to %s", addr);
1693 printk( KERN_INFO " --- %s ---\n",
1694 tdup);
1695 }
1696 if (dup !=0) {
1697 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1698 addr, boff, bhex, basc);
1699 }
1700 }
1701 return;
1702
1703} /* end of dumpit */
1704#endif
1705
1706/*-------------------------------------------------------------------*
1707* find_link *
1708*--------------------------------------------------------------------*/
1709static int
1710find_link(struct net_device *dev, char *host_name, char *ws_name )
1711{
1712 struct claw_privbk *privptr;
1713 struct claw_env *p_env;
1714 int rc=0;
1715
1716#ifdef FUNCTRACE
1717 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
1718#endif
1719 CLAW_DBF_TEXT(2,setup,"findlink");
1720#ifdef DEBUGMSG
1721 printk(KERN_INFO "%s: variable dev = \n",dev->name);
1722 dumpit((char *) dev, sizeof(struct net_device));
1723 printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
1724 printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
1725#endif
1726 privptr=dev->priv;
1727 p_env=privptr->p_env;
1728 switch (p_env->packing)
1729 {
1730 case PACKING_ASK:
1731 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1732 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1733 rc = EINVAL;
1734 break;
1735 case DO_PACKED:
1736 case PACK_SEND:
1737 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1738 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1739 rc = EINVAL;
1740 break;
1741 default:
1742 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1743 (memcmp(p_env->api_type , ws_name, 8)!=0))
1744 rc = EINVAL;
1745 break;
1746 }
1747
1748#ifdef FUNCTRACE
1749 printk(KERN_INFO "%s:%s Exit on line %d\n",
1750 dev->name,__FUNCTION__,__LINE__);
1751#endif
1752 return 0;
1753} /* end of find_link */
1754
1755/*-------------------------------------------------------------------*
1756 * claw_hw_tx *
1757 * *
1758 * *
1759 *-------------------------------------------------------------------*/
1760
1761static int
1762claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1763{
1764 int rc=0;
1765 struct claw_privbk *privptr;
1766 struct ccwbk *p_this_ccw;
1767 struct ccwbk *p_first_ccw;
1768 struct ccwbk *p_last_ccw;
1769 __u32 numBuffers;
1770 signed long len_of_data;
1771 unsigned long bytesInThisBuffer;
1772 unsigned char *pDataAddress;
1773 struct endccw *pEnd;
1774 struct ccw1 tempCCW;
1775 struct chbk *p_ch;
1776 struct claw_env *p_env;
1777 int lock;
1778 struct clawph *pk_head;
1779 struct chbk *ch;
1780#ifdef IOTRACE
1781 struct ccwbk *p_buf;
1782#endif
1783#ifdef FUNCTRACE
1784 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1785#endif
1786 CLAW_DBF_TEXT(4,trace,"hw_tx");
1787#ifdef DEBUGMSG
1788 printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
1789 dumpit((char *) skb, sizeof(struct sk_buff));
1790 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1791 dumpit((char *) dev, sizeof(struct net_device));
1792 printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
1793#endif
1794 privptr = (struct claw_privbk *) (dev->priv);
1795 p_ch=(struct chbk *)&privptr->channel[WRITE];
1796 p_env =privptr->p_env;
1797#ifdef IOTRACE
1798 printk(KERN_INFO "%s: %s() dump sk_buff \n",dev->name,__FUNCTION__);
1799 dumpit((char *)skb ,sizeof(struct sk_buff));
1800#endif
1801 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1802 /* scan the write queue to free any completed write packets */
1803 p_first_ccw=NULL;
1804 p_last_ccw=NULL;
1805 if ((p_env->packing >= PACK_SEND) &&
1806 (skb->cb[1] != 'P')) {
1807 skb_push(skb,sizeof(struct clawph));
1808 pk_head=(struct clawph *)skb->data;
1809 pk_head->len=skb->len-sizeof(struct clawph);
1810 if (pk_head->len%4) {
1811 pk_head->len+= 4-(pk_head->len%4);
1812 skb_pad(skb,4-(pk_head->len%4));
1813 skb_put(skb,4-(pk_head->len%4));
1814 }
1815 if (p_env->packing == DO_PACKED)
1816 pk_head->link_num = linkid;
1817 else
1818 pk_head->link_num = 0;
1819 pk_head->flag = 0x00;
1820 skb_pad(skb,4);
1821 skb->cb[1] = 'P';
1822 }
1823 if (linkid == 0) {
1824 if (claw_check_busy(dev)) {
1825 if (privptr->write_free_count!=0) {
1826 claw_clear_busy(dev);
1827 }
1828 else {
1829 claw_strt_out_IO(dev );
1830 claw_free_wrt_buf( dev );
1831 if (privptr->write_free_count==0) {
1832#ifdef IOTRACE
1833 printk(KERN_INFO "%s: "
1834 "(claw_check_busy) no free write "
1835 "buffers\n", dev->name);
1836#endif
1837 ch = &privptr->channel[WRITE];
1838 atomic_inc(&skb->users);
1839 skb_queue_tail(&ch->collect_queue, skb);
1840 goto Done;
1841 }
1842 else {
1843 claw_clear_busy(dev);
1844 }
1845 }
1846 }
1847 /* tx lock */
1848 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1849#ifdef DEBUGMSG
1850 printk(KERN_INFO "%s: busy (claw_test_and_setbit_"
1851 "busy)\n", dev->name);
1852#endif
1853 ch = &privptr->channel[WRITE];
1854 atomic_inc(&skb->users);
1855 skb_queue_tail(&ch->collect_queue, skb);
1856 claw_strt_out_IO(dev );
1857 rc=-EBUSY;
1858 goto Done2;
1859 }
1860 }
1861 /* See how many write buffers are required to hold this data */
1862 numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
1863 ( privptr->p_env->write_size);
1864
1865 /* If that number of buffers isn't available, give up for now */
1866 if (privptr->write_free_count < numBuffers ||
1867 privptr->p_write_free_chain == NULL ) {
1868
1869 claw_setbit_busy(TB_NOBUFFER,dev);
1870
1871#ifdef DEBUGMSG
1872 printk(KERN_INFO "%s: busy (claw_setbit_busy"
1873 "(TB_NOBUFFER))\n", dev->name);
1874 printk(KERN_INFO " free_count: %d, numBuffers : %d\n",
1875 (int)privptr->write_free_count,(int) numBuffers );
1876#endif
1877 ch = &privptr->channel[WRITE];
1878 atomic_inc(&skb->users);
1879 skb_queue_tail(&ch->collect_queue, skb);
1880 CLAW_DBF_TEXT(2,trace,"clawbusy");
1881 goto Done2;
1882 }
1883 pDataAddress=skb->data;
1884 len_of_data=skb->len;
1885
1886 while (len_of_data > 0) {
1887#ifdef DEBUGMSG
1888 printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
1889 dev->name ,__FUNCTION__,len_of_data);
1890 dumpit((char *)pDataAddress ,64);
1891#endif
1892 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1893 if (p_this_ccw == NULL) { /* lost the race */
1894 ch = &privptr->channel[WRITE];
1895 atomic_inc(&skb->users);
1896 skb_queue_tail(&ch->collect_queue, skb);
1897 goto Done2;
1898 }
1899 privptr->p_write_free_chain=p_this_ccw->next;
1900 p_this_ccw->next=NULL;
1901 --privptr->write_free_count; /* -1 */
1902 bytesInThisBuffer=len_of_data;
1903 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1904 len_of_data-=bytesInThisBuffer;
1905 pDataAddress+=(unsigned long)bytesInThisBuffer;
1906 /* setup write CCW */
1907 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1908 if (len_of_data>0) {
1909 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1910 }
1911 p_this_ccw->write.count=bytesInThisBuffer;
1912 /* now add to end of this chain */
1913 if (p_first_ccw==NULL) {
1914 p_first_ccw=p_this_ccw;
1915 }
1916 if (p_last_ccw!=NULL) {
1917 p_last_ccw->next=p_this_ccw;
1918 /* set up TIC ccws */
1919 p_last_ccw->w_TIC_1.cda=
1920 (__u32)__pa(&p_this_ccw->write);
1921 }
1922 p_last_ccw=p_this_ccw; /* save new last block */
1923#ifdef IOTRACE
1924 printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
1925 dev->name,__FUNCTION__,bytesInThisBuffer);
1926 dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
1927 dumpit((char *)p_this_ccw->p_buffer, 64);
1928#endif
1929 }
1930
1931 /* FirstCCW and LastCCW now contain a new set of write channel
1932 * programs to append to the running channel program
1933 */
1934
1935 if (p_first_ccw!=NULL) {
1936 /* setup ending ccw sequence for this segment */
1937 pEnd=privptr->p_end_ccw;
1938 if (pEnd->write1) {
1939 pEnd->write1=0x00; /* second end ccw is now active */
1940 /* set up Tic CCWs */
1941 p_last_ccw->w_TIC_1.cda=
1942 (__u32)__pa(&pEnd->write2_nop1);
1943 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1944 pEnd->write2_nop2.flags =
1945 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1946 pEnd->write2_nop2.cda=0;
1947 pEnd->write2_nop2.count=1;
1948 }
1949 else { /* end of if (pEnd->write1)*/
1950 pEnd->write1=0x01; /* first end ccw is now active */
1951 /* set up Tic CCWs */
1952 p_last_ccw->w_TIC_1.cda=
1953 (__u32)__pa(&pEnd->write1_nop1);
1954 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1955 pEnd->write1_nop2.flags =
1956 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1957 pEnd->write1_nop2.cda=0;
1958 pEnd->write1_nop2.count=1;
1959 } /* end if if (pEnd->write1) */
1960
1961
1962 if (privptr->p_write_active_first==NULL ) {
1963 privptr->p_write_active_first=p_first_ccw;
1964 privptr->p_write_active_last=p_last_ccw;
1965 }
1966 else {
1967
1968 /* set up Tic CCWs */
1969
1970 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1971 tempCCW.count=0;
1972 tempCCW.flags=0;
1973 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1974
1975 if (pEnd->write1) {
1976
1977 /*
1978 * first set of ending CCW's is chained to the new write
1979 * chain, so the second set is chained to the active chain
1980 * Therefore modify the second set to point the new write chain.
1981 * make sure we update the CCW atomically
1982 * so channel does not fetch it when it's only half done
1983 */
1984 memcpy( &pEnd->write2_nop2, &tempCCW ,
1985 sizeof(struct ccw1));
1986 privptr->p_write_active_last->w_TIC_1.cda=
1987 (__u32)__pa(&p_first_ccw->write);
1988 }
1989 else {
1990
1991 /*make sure we update the CCW atomically
1992 *so channel does not fetch it when it's only half done
1993 */
1994 memcpy(&pEnd->write1_nop2, &tempCCW ,
1995 sizeof(struct ccw1));
1996 privptr->p_write_active_last->w_TIC_1.cda=
1997 (__u32)__pa(&p_first_ccw->write);
1998
1999 } /* end if if (pEnd->write1) */
2000
2001 privptr->p_write_active_last->next=p_first_ccw;
2002 privptr->p_write_active_last=p_last_ccw;
2003 }
2004
2005 } /* endif (p_first_ccw!=NULL) */
2006
2007
2008#ifdef IOTRACE
2009 printk(KERN_INFO "%s: %s() > Dump Active CCW chain \n",
2010 dev->name,__FUNCTION__);
2011 p_buf=privptr->p_write_active_first;
2012 while (p_buf!=NULL) {
2013 dumpit((char *)p_buf, sizeof(struct ccwbk));
2014 p_buf=p_buf->next;
2015 }
2016 p_buf=(struct ccwbk*)privptr->p_end_ccw;
2017 dumpit((char *)p_buf, sizeof(struct endccw));
2018#endif
2019 dev_kfree_skb(skb);
2020 if (linkid==0) {
2021 lock=LOCK_NO;
2022 }
2023 else {
2024 lock=LOCK_YES;
2025 }
2026 claw_strt_out_IO(dev );
2027 /* if write free count is zero , set NOBUFFER */
2028#ifdef DEBUGMSG
2029 printk(KERN_INFO "%s: %s() > free_count is %d\n",
2030 dev->name,__FUNCTION__,
2031 (int) privptr->write_free_count );
2032#endif
2033 if (privptr->write_free_count==0) {
2034 claw_setbit_busy(TB_NOBUFFER,dev);
2035 }
2036Done2:
2037 claw_clearbit_busy(TB_TX,dev);
2038Done:
2039#ifdef FUNCTRACE
2040 printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
2041 dev->name,__FUNCTION__,__LINE__, rc);
2042#endif
2043 return(rc);
2044} /* end of claw_hw_tx */
2045
2046/*-------------------------------------------------------------------*
2047* *
2048* init_ccw_bk *
2049* *
2050*--------------------------------------------------------------------*/
2051
2052static int
2053init_ccw_bk(struct net_device *dev)
2054{
2055
2056 __u32 ccw_blocks_required;
2057 __u32 ccw_blocks_perpage;
2058 __u32 ccw_pages_required;
2059 __u32 claw_reads_perpage=1;
2060 __u32 claw_read_pages;
2061 __u32 claw_writes_perpage=1;
2062 __u32 claw_write_pages;
2063 void *p_buff=NULL;
2064 struct ccwbk*p_free_chain;
2065 struct ccwbk*p_buf;
2066 struct ccwbk*p_last_CCWB;
2067 struct ccwbk*p_first_CCWB;
2068 struct endccw *p_endccw=NULL;
2069 addr_t real_address;
2070 struct claw_privbk *privptr=dev->priv;
2071 struct clawh *pClawH=NULL;
2072 addr_t real_TIC_address;
2073 int i,j;
2074#ifdef FUNCTRACE
2075 printk(KERN_INFO "%s: %s() enter \n",dev->name,__FUNCTION__);
2076#endif
2077 CLAW_DBF_TEXT(4,trace,"init_ccw");
2078#ifdef DEBUGMSG
2079 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2080 dumpit((char *) dev, sizeof(struct net_device));
2081#endif
2082
2083 /* initialize statistics field */
2084 privptr->active_link_ID=0;
2085 /* initialize ccwbk pointers */
2086 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
2087 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
2088 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
2089 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
2090 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
2091 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
2092 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
2093 privptr->buffs_alloc = 0;
2094 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
2095 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
2096 /* initialize free write ccwbk counter */
2097 privptr->write_free_count=0; /* number of free bufs on write chain */
2098 p_last_CCWB = NULL;
2099 p_first_CCWB= NULL;
2100 /*
2101 * We need 1 CCW block for each read buffer, 1 for each
2102 * write buffer, plus 1 for ClawSignalBlock
2103 */
2104 ccw_blocks_required =
2105 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
2106#ifdef DEBUGMSG
2107 printk(KERN_INFO "%s: %s() "
2108 "ccw_blocks_required=%d\n",
2109 dev->name,__FUNCTION__,
2110 ccw_blocks_required);
2111 printk(KERN_INFO "%s: %s() "
2112 "PAGE_SIZE=0x%x\n",
2113 dev->name,__FUNCTION__,
2114 (unsigned int)PAGE_SIZE);
2115 printk(KERN_INFO "%s: %s() > "
2116 "PAGE_MASK=0x%x\n",
2117 dev->name,__FUNCTION__,
2118 (unsigned int)PAGE_MASK);
2119#endif
2120 /*
2121 * compute number of CCW blocks that will fit in a page
2122 */
2123 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
2124 ccw_pages_required=
2125 (ccw_blocks_required+ccw_blocks_perpage -1) /
2126 ccw_blocks_perpage;
2127
2128#ifdef DEBUGMSG
2129 printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
2130 dev->name,__FUNCTION__,
2131 ccw_blocks_perpage);
2132 printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
2133 dev->name,__FUNCTION__,
2134 ccw_pages_required);
2135#endif
2136 /*
2137 * read and write sizes are set by 2 constants in claw.h
2138 * 4k and 32k. Unpacked values other than 4k are not going to
2139 * provide good performance. With packing buffers support 32k
2140 * buffers are used.
2141 */
2142 if (privptr->p_env->read_size < PAGE_SIZE) {
2143 claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
2144 claw_read_pages= (privptr->p_env->read_buffers +
2145 claw_reads_perpage -1) / claw_reads_perpage;
2146 }
2147 else { /* > or equal */
2148 privptr->p_buff_pages_perread=
2149 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2150 claw_read_pages=
2151 privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
2152 }
2153 if (privptr->p_env->write_size < PAGE_SIZE) {
2154 claw_writes_perpage=
2155 PAGE_SIZE / privptr->p_env->write_size;
2156 claw_write_pages=
2157 (privptr->p_env->write_buffers + claw_writes_perpage -1) /
2158 claw_writes_perpage;
2159
2160 }
2161 else { /* > or equal */
2162 privptr->p_buff_pages_perwrite=
2163 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2164 claw_write_pages=
2165 privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
2166 }
2167#ifdef DEBUGMSG
2168 if (privptr->p_env->read_size < PAGE_SIZE) {
2169 printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
2170 dev->name,__FUNCTION__,
2171 claw_reads_perpage);
2172 }
2173 else {
2174 printk(KERN_INFO "%s: %s() pages_perread=%d\n",
2175 dev->name,__FUNCTION__,
2176 privptr->p_buff_pages_perread);
2177 }
2178 printk(KERN_INFO "%s: %s() read_pages=%d\n",
2179 dev->name,__FUNCTION__,
2180 claw_read_pages);
2181 if (privptr->p_env->write_size < PAGE_SIZE) {
2182 printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
2183 dev->name,__FUNCTION__,
2184 claw_writes_perpage);
2185 }
2186 else {
2187 printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
2188 dev->name,__FUNCTION__,
2189 privptr->p_buff_pages_perwrite);
2190 }
2191 printk(KERN_INFO "%s: %s() write_pages=%d\n",
2192 dev->name,__FUNCTION__,
2193 claw_write_pages);
2194#endif
2195
2196
2197 /*
2198 * allocate ccw_pages_required
2199 */
2200 if (privptr->p_buff_ccw==NULL) {
2201 privptr->p_buff_ccw=
2202 (void *)__get_free_pages(__GFP_DMA,
2203 (int)pages_to_order_of_mag(ccw_pages_required ));
2204 if (privptr->p_buff_ccw==NULL) {
2205 printk(KERN_INFO "%s: %s() "
2206 "__get_free_pages for CCWs failed : "
2207 "pages is %d\n",
2208 dev->name,__FUNCTION__,
2209 ccw_pages_required );
2210#ifdef FUNCTRACE
2211 printk(KERN_INFO "%s: %s() > "
2212 "exit on line %d, rc = ENOMEM\n",
2213 dev->name,__FUNCTION__,
2214 __LINE__);
2215#endif
2216 return -ENOMEM;
2217 }
2218 privptr->p_buff_ccw_num=ccw_pages_required;
2219 }
2220 memset(privptr->p_buff_ccw, 0x00,
2221 privptr->p_buff_ccw_num * PAGE_SIZE);
2222
2223 /*
2224 * obtain ending ccw block address
2225 *
2226 */
2227 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
2228 real_address = (__u32)__pa(privptr->p_end_ccw);
2229 /* Initialize ending CCW block */
2230#ifdef DEBUGMSG
2231 printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
2232 dev->name,__FUNCTION__);
2233#endif
2234
2235 p_endccw=privptr->p_end_ccw;
2236 p_endccw->real=real_address;
2237 p_endccw->write1=0x00;
2238 p_endccw->read1=0x00;
2239
2240 /* write1_nop1 */
2241 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2242 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2243 p_endccw->write1_nop1.count = 1;
2244 p_endccw->write1_nop1.cda = 0;
2245
2246 /* write1_nop2 */
2247 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2248 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2249 p_endccw->write1_nop2.count = 1;
2250 p_endccw->write1_nop2.cda = 0;
2251
2252 /* write2_nop1 */
2253 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2254 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2255 p_endccw->write2_nop1.count = 1;
2256 p_endccw->write2_nop1.cda = 0;
2257
2258 /* write2_nop2 */
2259 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2260 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2261 p_endccw->write2_nop2.count = 1;
2262 p_endccw->write2_nop2.cda = 0;
2263
2264 /* read1_nop1 */
2265 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2266 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2267 p_endccw->read1_nop1.count = 1;
2268 p_endccw->read1_nop1.cda = 0;
2269
2270 /* read1_nop2 */
2271 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2272 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2273 p_endccw->read1_nop2.count = 1;
2274 p_endccw->read1_nop2.cda = 0;
2275
2276 /* read2_nop1 */
2277 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2278 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2279 p_endccw->read2_nop1.count = 1;
2280 p_endccw->read2_nop1.cda = 0;
2281
2282 /* read2_nop2 */
2283 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2284 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2285 p_endccw->read2_nop2.count = 1;
2286 p_endccw->read2_nop2.cda = 0;
2287
2288#ifdef IOTRACE
2289 printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
2290 dev->name,__FUNCTION__);
2291 dumpit((char *)p_endccw, sizeof(struct endccw));
2292#endif
2293
2294 /*
2295 * Build a chain of CCWs
2296 *
2297 */
2298
2299#ifdef DEBUGMSG
2300 printk(KERN_INFO "%s: %s() Begin build a chain of CCW buffer \n",
2301 dev->name,__FUNCTION__);
2302#endif
2303 p_buff=privptr->p_buff_ccw;
2304
2305 p_free_chain=NULL;
2306 for (i=0 ; i < ccw_pages_required; i++ ) {
2307 real_address = (__u32)__pa(p_buff);
2308 p_buf=p_buff;
2309 for (j=0 ; j < ccw_blocks_perpage ; j++) {
2310 p_buf->next = p_free_chain;
2311 p_free_chain = p_buf;
2312 p_buf->real=(__u32)__pa(p_buf);
2313 ++p_buf;
2314 }
2315 p_buff+=PAGE_SIZE;
2316 }
2317#ifdef DEBUGMSG
2318 printk(KERN_INFO "%s: %s() "
2319 "End build a chain of CCW buffer \n",
2320 dev->name,__FUNCTION__);
2321 p_buf=p_free_chain;
2322 while (p_buf!=NULL) {
2323 dumpit((char *)p_buf, sizeof(struct ccwbk));
2324 p_buf=p_buf->next;
2325 }
2326#endif
2327
2328 /*
2329 * Initialize ClawSignalBlock
2330 *
2331 */
2332#ifdef DEBUGMSG
2333 printk(KERN_INFO "%s: %s() "
2334 "Begin initialize ClawSignalBlock \n",
2335 dev->name,__FUNCTION__);
2336#endif
2337 if (privptr->p_claw_signal_blk==NULL) {
2338 privptr->p_claw_signal_blk=p_free_chain;
2339 p_free_chain=p_free_chain->next;
2340 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
2341 pClawH->length=0xffff;
2342 pClawH->opcode=0xff;
2343 pClawH->flag=CLAW_BUSY;
2344 }
2345#ifdef DEBUGMSG
2346 printk(KERN_INFO "%s: %s() > End initialize "
2347 "ClawSignalBlock\n",
2348 dev->name,__FUNCTION__);
2349 dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
2350#endif
2351
2352 /*
2353 * allocate write_pages_required and add to free chain
2354 */
2355 if (privptr->p_buff_write==NULL) {
2356 if (privptr->p_env->write_size < PAGE_SIZE) {
2357 privptr->p_buff_write=
2358 (void *)__get_free_pages(__GFP_DMA,
2359 (int)pages_to_order_of_mag(claw_write_pages ));
2360 if (privptr->p_buff_write==NULL) {
2361 printk(KERN_INFO "%s: %s() __get_free_pages for write"
2362 " bufs failed : get is for %d pages\n",
2363 dev->name,__FUNCTION__,claw_write_pages );
2364 free_pages((unsigned long)privptr->p_buff_ccw,
2365 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2366 privptr->p_buff_ccw=NULL;
2367#ifdef FUNCTRACE
2368 printk(KERN_INFO "%s: %s() > exit on line %d,"
2369 "rc = ENOMEM\n",
2370 dev->name,__FUNCTION__,__LINE__);
2371#endif
2372 return -ENOMEM;
2373 }
2374 /*
2375 * Build CLAW write free chain
2376 *
2377 */
2378
2379 memset(privptr->p_buff_write, 0x00,
2380 ccw_pages_required * PAGE_SIZE);
2381#ifdef DEBUGMSG
2382 printk(KERN_INFO "%s: %s() Begin build claw write free "
2383 "chain \n",dev->name,__FUNCTION__);
2384#endif
2385 privptr->p_write_free_chain=NULL;
2386
2387 p_buff=privptr->p_buff_write;
2388
2389 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
2390 p_buf = p_free_chain; /* get a CCW */
2391 p_free_chain = p_buf->next;
2392 p_buf->next =privptr->p_write_free_chain;
2393 privptr->p_write_free_chain = p_buf;
2394 p_buf-> p_buffer = (struct clawbuf *)p_buff;
2395 p_buf-> write.cda = (__u32)__pa(p_buff);
2396 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2397 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2398 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2399 p_buf-> w_read_FF.count = 1;
2400 p_buf-> w_read_FF.cda =
2401 (__u32)__pa(&p_buf-> header.flag);
2402 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2403 p_buf-> w_TIC_1.flags = 0;
2404 p_buf-> w_TIC_1.count = 0;
2405
2406 if (((unsigned long)p_buff+privptr->p_env->write_size) >=
2407 ((unsigned long)(p_buff+2*
2408 (privptr->p_env->write_size) -1) & PAGE_MASK)) {
2409 p_buff= p_buff+privptr->p_env->write_size;
2410 }
2411 }
2412 }
2413 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
2414 {
2415 privptr->p_write_free_chain=NULL;
2416 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
2417 p_buff=(void *)__get_free_pages(__GFP_DMA,
2418 (int)pages_to_order_of_mag(
2419 privptr->p_buff_pages_perwrite) );
2420#ifdef IOTRACE
2421 printk(KERN_INFO "%s:%s __get_free_pages "
2422 "for writes buf: get for %d pages\n",
2423 dev->name,__FUNCTION__,
2424 privptr->p_buff_pages_perwrite);
2425#endif
2426 if (p_buff==NULL) {
2427 printk(KERN_INFO "%s:%s __get_free_pages"
2428 "for writes buf failed : get is for %d pages\n",
2429 dev->name,
2430 __FUNCTION__,
2431 privptr->p_buff_pages_perwrite );
2432 free_pages((unsigned long)privptr->p_buff_ccw,
2433 (int)pages_to_order_of_mag(
2434 privptr->p_buff_ccw_num));
2435 privptr->p_buff_ccw=NULL;
2436 p_buf=privptr->p_buff_write;
2437 while (p_buf!=NULL) {
2438 free_pages((unsigned long)
2439 p_buf->p_buffer,
2440 (int)pages_to_order_of_mag(
2441 privptr->p_buff_pages_perwrite));
2442 p_buf=p_buf->next;
2443 }
2444#ifdef FUNCTRACE
2445 printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
2446 dev->name,
2447 __FUNCTION__,
2448 __LINE__);
2449#endif
2450 return -ENOMEM;
2451 } /* Error on get_pages */
2452 memset(p_buff, 0x00, privptr->p_env->write_size );
2453 p_buf = p_free_chain;
2454 p_free_chain = p_buf->next;
2455 p_buf->next = privptr->p_write_free_chain;
2456 privptr->p_write_free_chain = p_buf;
2457 privptr->p_buff_write = p_buf;
2458 p_buf->p_buffer=(struct clawbuf *)p_buff;
2459 p_buf-> write.cda = (__u32)__pa(p_buff);
2460 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2461 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2462 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2463 p_buf-> w_read_FF.count = 1;
2464 p_buf-> w_read_FF.cda =
2465 (__u32)__pa(&p_buf-> header.flag);
2466 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2467 p_buf-> w_TIC_1.flags = 0;
2468 p_buf-> w_TIC_1.count = 0;
2469 } /* for all write_buffers */
2470
2471 } /* else buffers are PAGE_SIZE or bigger */
2472
2473 }
2474 privptr->p_buff_write_num=claw_write_pages;
2475 privptr->write_free_count=privptr->p_env->write_buffers;
2476
2477
2478#ifdef DEBUGMSG
2479 printk(KERN_INFO "%s:%s End build claw write free chain \n",
2480 dev->name,__FUNCTION__);
2481 p_buf=privptr->p_write_free_chain;
2482 while (p_buf!=NULL) {
2483 dumpit((char *)p_buf, sizeof(struct ccwbk));
2484 p_buf=p_buf->next;
2485 }
2486#endif
2487 /*
2488 * allocate read_pages_required and chain to free chain
2489 */
2490 if (privptr->p_buff_read==NULL) {
2491 if (privptr->p_env->read_size < PAGE_SIZE) {
2492 privptr->p_buff_read=
2493 (void *)__get_free_pages(__GFP_DMA,
2494 (int)pages_to_order_of_mag(claw_read_pages) );
2495 if (privptr->p_buff_read==NULL) {
2496 printk(KERN_INFO "%s: %s() "
2497 "__get_free_pages for read buf failed : "
2498 "get is for %d pages\n",
2499 dev->name,__FUNCTION__,claw_read_pages );
2500 free_pages((unsigned long)privptr->p_buff_ccw,
2501 (int)pages_to_order_of_mag(
2502 privptr->p_buff_ccw_num));
2503 /* free the write pages size is < page size */
2504 free_pages((unsigned long)privptr->p_buff_write,
2505 (int)pages_to_order_of_mag(
2506 privptr->p_buff_write_num));
2507 privptr->p_buff_ccw=NULL;
2508 privptr->p_buff_write=NULL;
2509#ifdef FUNCTRACE
2510 printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
2511 " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
2512#endif
2513 return -ENOMEM;
2514 }
2515 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
2516 privptr->p_buff_read_num=claw_read_pages;
2517 /*
2518 * Build CLAW read free chain
2519 *
2520 */
2521#ifdef DEBUGMSG
2522 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2523 dev->name,__FUNCTION__);
2524#endif
2525 p_buff=privptr->p_buff_read;
2526 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2527 p_buf = p_free_chain;
2528 p_free_chain = p_buf->next;
2529
2530 if (p_last_CCWB==NULL) {
2531 p_buf->next=NULL;
2532 real_TIC_address=0;
2533 p_last_CCWB=p_buf;
2534 }
2535 else {
2536 p_buf->next=p_first_CCWB;
2537 real_TIC_address=
2538 (__u32)__pa(&p_first_CCWB -> read );
2539 }
2540
2541 p_first_CCWB=p_buf;
2542
2543 p_buf->p_buffer=(struct clawbuf *)p_buff;
2544 /* initialize read command */
2545 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2546 p_buf-> read.cda = (__u32)__pa(p_buff);
2547 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2548 p_buf-> read.count = privptr->p_env->read_size;
2549
2550 /* initialize read_h command */
2551 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2552 p_buf-> read_h.cda =
2553 (__u32)__pa(&(p_buf->header));
2554 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2555 p_buf-> read_h.count = sizeof(struct clawh);
2556
2557 /* initialize Signal command */
2558 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2559 p_buf-> signal.cda =
2560 (__u32)__pa(&(pClawH->flag));
2561 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2562 p_buf-> signal.count = 1;
2563
2564 /* initialize r_TIC_1 command */
2565 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2566 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2567 p_buf-> r_TIC_1.flags = 0;
2568 p_buf-> r_TIC_1.count = 0;
2569
2570 /* initialize r_read_FF command */
2571 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2572 p_buf-> r_read_FF.cda =
2573 (__u32)__pa(&(pClawH->flag));
2574 p_buf-> r_read_FF.flags =
2575 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2576 p_buf-> r_read_FF.count = 1;
2577
2578 /* initialize r_TIC_2 */
2579 memcpy(&p_buf->r_TIC_2,
2580 &p_buf->r_TIC_1, sizeof(struct ccw1));
2581
2582 /* initialize Header */
2583 p_buf->header.length=0xffff;
2584 p_buf->header.opcode=0xff;
2585 p_buf->header.flag=CLAW_PENDING;
2586
2587 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
2588 ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
2589 & PAGE_MASK) ) {
2590 p_buff= p_buff+privptr->p_env->read_size;
2591 }
2592 else {
2593 p_buff=
2594 (void *)((unsigned long)
2595 (p_buff+2*(privptr->p_env->read_size) -1)
2596 & PAGE_MASK) ;
2597 }
2598 } /* for read_buffers */
2599 } /* read_size < PAGE_SIZE */
2600 else { /* read Size >= PAGE_SIZE */
2601
2602#ifdef DEBUGMSG
2603 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2604 dev->name,__FUNCTION__);
2605#endif
2606 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2607 p_buff = (void *)__get_free_pages(__GFP_DMA,
2608 (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
2609 if (p_buff==NULL) {
2610 printk(KERN_INFO "%s: %s() __get_free_pages for read "
2611 "buf failed : get is for %d pages\n",
2612 dev->name,__FUNCTION__,
2613 privptr->p_buff_pages_perread );
2614 free_pages((unsigned long)privptr->p_buff_ccw,
2615 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2616 /* free the write pages */
2617 p_buf=privptr->p_buff_write;
2618 while (p_buf!=NULL) {
2619 free_pages((unsigned long)p_buf->p_buffer,
2620 (int)pages_to_order_of_mag(
2621 privptr->p_buff_pages_perwrite ));
2622 p_buf=p_buf->next;
2623 }
2624 /* free any read pages already alloc */
2625 p_buf=privptr->p_buff_read;
2626 while (p_buf!=NULL) {
2627 free_pages((unsigned long)p_buf->p_buffer,
2628 (int)pages_to_order_of_mag(
2629 privptr->p_buff_pages_perread ));
2630 p_buf=p_buf->next;
2631 }
2632 privptr->p_buff_ccw=NULL;
2633 privptr->p_buff_write=NULL;
2634#ifdef FUNCTRACE
2635 printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
2636 dev->name,__FUNCTION__,
2637 __LINE__);
2638#endif
2639 return -ENOMEM;
2640 }
2641 memset(p_buff, 0x00, privptr->p_env->read_size);
2642 p_buf = p_free_chain;
2643 privptr->p_buff_read = p_buf;
2644 p_free_chain = p_buf->next;
2645
2646 if (p_last_CCWB==NULL) {
2647 p_buf->next=NULL;
2648 real_TIC_address=0;
2649 p_last_CCWB=p_buf;
2650 }
2651 else {
2652 p_buf->next=p_first_CCWB;
2653 real_TIC_address=
2654 (addr_t)__pa(
2655 &p_first_CCWB -> read );
2656 }
2657
2658 p_first_CCWB=p_buf;
2659 /* save buff address */
2660 p_buf->p_buffer=(struct clawbuf *)p_buff;
2661 /* initialize read command */
2662 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2663 p_buf-> read.cda = (__u32)__pa(p_buff);
2664 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2665 p_buf-> read.count = privptr->p_env->read_size;
2666
2667 /* initialize read_h command */
2668 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2669 p_buf-> read_h.cda =
2670 (__u32)__pa(&(p_buf->header));
2671 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2672 p_buf-> read_h.count = sizeof(struct clawh);
2673
2674 /* initialize Signal command */
2675 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2676 p_buf-> signal.cda =
2677 (__u32)__pa(&(pClawH->flag));
2678 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2679 p_buf-> signal.count = 1;
2680
2681 /* initialize r_TIC_1 command */
2682 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2683 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2684 p_buf-> r_TIC_1.flags = 0;
2685 p_buf-> r_TIC_1.count = 0;
2686
2687 /* initialize r_read_FF command */
2688 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2689 p_buf-> r_read_FF.cda =
2690 (__u32)__pa(&(pClawH->flag));
2691 p_buf-> r_read_FF.flags =
2692 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2693 p_buf-> r_read_FF.count = 1;
2694
2695 /* initialize r_TIC_2 */
2696 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2697 sizeof(struct ccw1));
2698
2699 /* initialize Header */
2700 p_buf->header.length=0xffff;
2701 p_buf->header.opcode=0xff;
2702 p_buf->header.flag=CLAW_PENDING;
2703
2704 } /* For read_buffers */
2705 } /* read_size >= PAGE_SIZE */
2706 } /* pBuffread = NULL */
2707#ifdef DEBUGMSG
2708 printk(KERN_INFO "%s: %s() > End build claw read free chain \n",
2709 dev->name,__FUNCTION__);
2710 p_buf=p_first_CCWB;
2711 while (p_buf!=NULL) {
2712 dumpit((char *)p_buf, sizeof(struct ccwbk));
2713 p_buf=p_buf->next;
2714 }
2715
2716#endif
2717 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
2718 privptr->buffs_alloc = 1;
2719#ifdef FUNCTRACE
2720 printk(KERN_INFO "%s: %s() exit on line %d\n",
2721 dev->name,__FUNCTION__,__LINE__);
2722#endif
2723 return 0;
2724} /* end of init_ccw_bk */
2725
2726/*-------------------------------------------------------------------*
2727* *
2728* probe_error *
2729* *
2730*--------------------------------------------------------------------*/
2731
2732static void
2733probe_error( struct ccwgroup_device *cgdev)
2734{
2735 struct claw_privbk *privptr;
2736#ifdef FUNCTRACE
2737 printk(KERN_INFO "%s enter \n",__FUNCTION__);
2738#endif
2739 CLAW_DBF_TEXT(4,trace,"proberr");
2740#ifdef DEBUGMSG
2741 printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
2742 dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
2743#endif
2744 privptr=(struct claw_privbk *)cgdev->dev.driver_data;
2745 if (privptr!=NULL) {
2746 if (privptr->p_env != NULL) {
2747 kfree(privptr->p_env);
2748 privptr->p_env=NULL;
2749 }
2750 if (privptr->p_mtc_envelope!=NULL) {
2751 kfree(privptr->p_mtc_envelope);
2752 privptr->p_mtc_envelope=NULL;
2753 }
2754 kfree(privptr);
2755 privptr=NULL;
2756 }
2757#ifdef FUNCTRACE
2758 printk(KERN_INFO "%s > exit on line %d\n",
2759 __FUNCTION__,__LINE__);
2760#endif
2761
2762 return;
2763} /* probe_error */
2764
2765
2766
2767/*-------------------------------------------------------------------*
2768* claw_process_control *
2769* *
2770* *
2771*--------------------------------------------------------------------*/
2772
2773static int
2774claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2775{
2776
2777 struct clawbuf *p_buf;
2778 struct clawctl ctlbk;
2779 struct clawctl *p_ctlbk;
2780 char temp_host_name[8];
2781 char temp_ws_name[8];
2782 struct claw_privbk *privptr;
2783 struct claw_env *p_env;
2784 struct sysval *p_sysval;
2785 struct conncmd *p_connect=NULL;
2786 int rc;
2787 struct chbk *p_ch = NULL;
2788#ifdef FUNCTRACE
2789 printk(KERN_INFO "%s: %s() > enter \n",
2790 dev->name,__FUNCTION__);
2791#endif
2792 CLAW_DBF_TEXT(2,setup,"clw_cntl");
2793#ifdef DEBUGMSG
2794 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2795 dumpit((char *) dev, sizeof(struct net_device));
2796 printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
2797 dumpit((char *) p_ccw, sizeof(struct ccwbk *));
2798#endif
2799 udelay(1000); /* Wait a ms for the control packets to
2800 *catch up to each other */
2801 privptr=dev->priv;
2802 p_env=privptr->p_env;
2803 memcpy( &temp_host_name, p_env->host_name, 8);
2804 memcpy( &temp_ws_name, p_env->adapter_name , 8);
2805 printk(KERN_INFO "%s: CLAW device %.8s: "
2806 "Received Control Packet\n",
2807 dev->name, temp_ws_name);
2808 if (privptr->release_pend==1) {
2809#ifdef FUNCTRACE
2810 printk(KERN_INFO "%s: %s() > "
2811 "exit on line %d, rc=0\n",
2812 dev->name,__FUNCTION__,__LINE__);
2813#endif
2814 return 0;
2815 }
2816 p_buf=p_ccw->p_buffer;
2817 p_ctlbk=&ctlbk;
2818 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2819 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2820 } else {
2821 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2822 }
2823#ifdef IOTRACE
2824 printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
2825 dumpit((char *)p_ctlbk, sizeof(struct clawctl));
2826#endif
2827 switch (p_ctlbk->command)
2828 {
2829 case SYSTEM_VALIDATE_REQUEST:
2830 if (p_ctlbk->version!=CLAW_VERSION_ID) {
2831 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2832 CLAW_RC_WRONG_VERSION );
2833 printk("%s: %d is wrong version id. "
2834 "Expected %d\n",
2835 dev->name, p_ctlbk->version,
2836 CLAW_VERSION_ID);
2837 }
2838 p_sysval=(struct sysval *)&(p_ctlbk->data);
2839 printk( "%s: Recv Sys Validate Request: "
2840 "Vers=%d,link_id=%d,Corr=%d,WS name=%."
2841 "8s,Host name=%.8s\n",
2842 dev->name, p_ctlbk->version,
2843 p_ctlbk->linkid,
2844 p_ctlbk->correlator,
2845 p_sysval->WS_name,
2846 p_sysval->host_name);
2847 if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
2848 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2849 CLAW_RC_NAME_MISMATCH );
2850 CLAW_DBF_TEXT(2,setup,"HSTBAD");
2851 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
2852 CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
2853 printk(KERN_INFO "%s: Host name mismatch\n",
2854 dev->name);
2855 printk(KERN_INFO "%s: Received :%s: "
2856 "expected :%s: \n",
2857 dev->name,
2858 p_sysval->host_name,
2859 temp_host_name);
2860 }
2861 if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
2862 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2863 CLAW_RC_NAME_MISMATCH );
2864 CLAW_DBF_TEXT(2,setup,"WSNBAD");
2865 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
2866 CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
2867 printk(KERN_INFO "%s: WS name mismatch\n",
2868 dev->name);
2869 printk(KERN_INFO "%s: Received :%s: "
2870 "expected :%s: \n",
2871 dev->name,
2872 p_sysval->WS_name,
2873 temp_ws_name);
2874 }
2875 if (( p_sysval->write_frame_size < p_env->write_size) &&
2876 ( p_env->packing == 0)) {
2877 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2878 CLAW_RC_HOST_RCV_TOO_SMALL );
2879 printk(KERN_INFO "%s: host write size is too "
2880 "small\n", dev->name);
2881 CLAW_DBF_TEXT(2,setup,"wrtszbad");
2882 }
2883 if (( p_sysval->read_frame_size < p_env->read_size) &&
2884 ( p_env->packing == 0)) {
2885 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2886 CLAW_RC_HOST_RCV_TOO_SMALL );
2887 printk(KERN_INFO "%s: host read size is too "
2888 "small\n", dev->name);
2889 CLAW_DBF_TEXT(2,setup,"rdsizbad");
2890 }
2891 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
2892 printk("%s: CLAW device %.8s: System validate"
2893 " completed.\n",dev->name, temp_ws_name);
2894 printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
2895 p_sysval->read_frame_size,p_sysval->write_frame_size);
2896 privptr->system_validate_comp=1;
2897 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
2898 p_env->packing = PACKING_ASK;
2899 }
2900 claw_strt_conn_req(dev);
2901 break;
2902
2903 case SYSTEM_VALIDATE_RESPONSE:
2904 p_sysval=(struct sysval *)&(p_ctlbk->data);
2905 printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
2906 "WS name=%.8s,Host name=%.8s\n",
2907 dev->name,
2908 p_ctlbk->version,
2909 p_ctlbk->correlator,
2910 p_ctlbk->rc,
2911 p_sysval->WS_name,
2912 p_sysval->host_name);
2913 switch (p_ctlbk->rc)
2914 {
2915 case 0:
2916 printk(KERN_INFO "%s: CLAW device "
2917 "%.8s: System validate "
2918 "completed.\n",
2919 dev->name, temp_ws_name);
2920 if (privptr->system_validate_comp == 0)
2921 claw_strt_conn_req(dev);
2922 privptr->system_validate_comp=1;
2923 break;
2924 case CLAW_RC_NAME_MISMATCH:
2925 printk(KERN_INFO "%s: Sys Validate "
2926 "Resp : Host, WS name is "
2927 "mismatch\n",
2928 dev->name);
2929 break;
2930 case CLAW_RC_WRONG_VERSION:
2931 printk(KERN_INFO "%s: Sys Validate "
2932 "Resp : Wrong version\n",
2933 dev->name);
2934 break;
2935 case CLAW_RC_HOST_RCV_TOO_SMALL:
2936 printk(KERN_INFO "%s: Sys Validate "
2937 "Resp : bad frame size\n",
2938 dev->name);
2939 break;
2940 default:
2941 printk(KERN_INFO "%s: Sys Validate "
2942 "error code=%d \n",
2943 dev->name, p_ctlbk->rc );
2944 break;
2945 }
2946 break;
2947
2948 case CONNECTION_REQUEST:
2949 p_connect=(struct conncmd *)&(p_ctlbk->data);
2950 printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2951 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2952 dev->name,
2953 p_ctlbk->version,
2954 p_ctlbk->linkid,
2955 p_ctlbk->correlator,
2956 p_connect->host_name,
2957 p_connect->WS_name);
2958 if (privptr->active_link_ID!=0 ) {
2959 claw_snd_disc(dev, p_ctlbk);
2960 printk(KERN_INFO "%s: Conn Req error : "
2961 "already logical link is active \n",
2962 dev->name);
2963 }
2964 if (p_ctlbk->linkid!=1 ) {
2965 claw_snd_disc(dev, p_ctlbk);
2966 printk(KERN_INFO "%s: Conn Req error : "
2967 "req logical link id is not 1\n",
2968 dev->name);
2969 }
2970 rc=find_link(dev,
2971 p_connect->host_name, p_connect->WS_name);
2972 if (rc!=0) {
2973 claw_snd_disc(dev, p_ctlbk);
2974 printk(KERN_INFO "%s: Conn Req error : "
2975 "req appl name does not match\n",
2976 dev->name);
2977 }
2978 claw_send_control(dev,
2979 CONNECTION_CONFIRM, p_ctlbk->linkid,
2980 p_ctlbk->correlator,
2981 0, p_connect->host_name,
2982 p_connect->WS_name);
2983 if (p_env->packing == PACKING_ASK) {
2984 printk("%s: Now Pack ask\n",dev->name);
2985 p_env->packing = PACK_SEND;
2986 claw_snd_conn_req(dev,0);
2987 }
2988 printk(KERN_INFO "%s: CLAW device %.8s: Connection "
2989 "completed link_id=%d.\n",
2990 dev->name, temp_ws_name,
2991 p_ctlbk->linkid);
2992 privptr->active_link_ID=p_ctlbk->linkid;
2993 p_ch=&privptr->channel[WRITE];
2994 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2995 break;
2996 case CONNECTION_RESPONSE:
2997 p_connect=(struct conncmd *)&(p_ctlbk->data);
2998 printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
2999 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
3000 dev->name,
3001 p_ctlbk->version,
3002 p_ctlbk->linkid,
3003 p_ctlbk->correlator,
3004 p_ctlbk->rc,
3005 p_connect->host_name,
3006 p_connect->WS_name);
3007
3008 if (p_ctlbk->rc !=0 ) {
3009 printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
3010 dev->name, p_ctlbk->rc);
3011 return 1;
3012 }
3013 rc=find_link(dev,
3014 p_connect->host_name, p_connect->WS_name);
3015 if (rc!=0) {
3016 claw_snd_disc(dev, p_ctlbk);
3017 printk(KERN_INFO "%s: Conn Resp error: "
3018 "req appl name does not match\n",
3019 dev->name);
3020 }
3021 /* should be until CONNECTION_CONFIRM */
3022 privptr->active_link_ID = - (p_ctlbk->linkid);
3023 break;
3024 case CONNECTION_CONFIRM:
3025 p_connect=(struct conncmd *)&(p_ctlbk->data);
3026 printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
3027 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
3028 dev->name,
3029 p_ctlbk->version,
3030 p_ctlbk->linkid,
3031 p_ctlbk->correlator,
3032 p_connect->host_name,
3033 p_connect->WS_name);
3034 if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
3035 privptr->active_link_ID=p_ctlbk->linkid;
3036 if (p_env->packing > PACKING_ASK) {
3037 printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
3038 p_env->packing = DO_PACKED;
3039 }
3040 p_ch=&privptr->channel[WRITE];
3041 wake_up(&p_ch->wait);
3042 }
3043 else {
3044 printk(KERN_INFO "%s: Conn confirm: "
3045 "unexpected linkid=%d \n",
3046 dev->name, p_ctlbk->linkid);
3047 claw_snd_disc(dev, p_ctlbk);
3048 }
3049 break;
3050 case DISCONNECT:
3051 printk(KERN_INFO "%s: Disconnect: "
3052 "Vers=%d,link_id=%d,Corr=%d\n",
3053 dev->name, p_ctlbk->version,
3054 p_ctlbk->linkid, p_ctlbk->correlator);
3055 if ((p_ctlbk->linkid == 2) &&
3056 (p_env->packing == PACK_SEND)) {
3057 privptr->active_link_ID = 1;
3058 p_env->packing = DO_PACKED;
3059 }
3060 else
3061 privptr->active_link_ID=0;
3062 break;
3063 case CLAW_ERROR:
3064 printk(KERN_INFO "%s: CLAW ERROR detected\n",
3065 dev->name);
3066 break;
3067 default:
3068 printk(KERN_INFO "%s: Unexpected command code=%d \n",
3069 dev->name, p_ctlbk->command);
3070 break;
3071 }
3072
3073#ifdef FUNCTRACE
3074 printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
3075 dev->name,__FUNCTION__,__LINE__);
3076#endif
3077
3078 return 0;
3079} /* end of claw_process_control */
3080
3081
3082/*-------------------------------------------------------------------*
3083* claw_send_control *
3084* *
3085*--------------------------------------------------------------------*/
3086
3087static int
3088claw_send_control(struct net_device *dev, __u8 type, __u8 link,
3089 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
3090{
3091 struct claw_privbk *privptr;
3092 struct clawctl *p_ctl;
3093 struct sysval *p_sysval;
3094 struct conncmd *p_connect;
3095 struct sk_buff *skb;
3096
3097#ifdef FUNCTRACE
3098 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
3099#endif
3100 CLAW_DBF_TEXT(2,setup,"sndcntl");
3101#ifdef DEBUGMSG
3102 printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
3103 printk(KERN_INFO "%s: variable type = 0x%X, link = "
3104 "%d, correlator = %d, rc = %d\n",
3105 dev->name,type, link, correlator, rc);
3106 printk(KERN_INFO "%s: variable local_name = %s, "
3107 "remote_name = %s\n",dev->name, local_name, remote_name);
3108#endif
3109 privptr=dev->priv;
3110 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3111
3112 p_ctl->command=type;
3113 p_ctl->version=CLAW_VERSION_ID;
3114 p_ctl->linkid=link;
3115 p_ctl->correlator=correlator;
3116 p_ctl->rc=rc;
3117
3118 p_sysval=(struct sysval *)&p_ctl->data;
3119 p_connect=(struct conncmd *)&p_ctl->data;
3120
3121 switch (p_ctl->command) {
3122 case SYSTEM_VALIDATE_REQUEST:
3123 case SYSTEM_VALIDATE_RESPONSE:
3124 memcpy(&p_sysval->host_name, local_name, 8);
3125 memcpy(&p_sysval->WS_name, remote_name, 8);
3126 if (privptr->p_env->packing > 0) {
3127 p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
3128 p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
3129 } else {
3130 /* how big is the piggest group of packets */
3131 p_sysval->read_frame_size=privptr->p_env->read_size;
3132 p_sysval->write_frame_size=privptr->p_env->write_size;
3133 }
3134 memset(&p_sysval->reserved, 0x00, 4);
3135 break;
3136 case CONNECTION_REQUEST:
3137 case CONNECTION_RESPONSE:
3138 case CONNECTION_CONFIRM:
3139 case DISCONNECT:
3140 memcpy(&p_sysval->host_name, local_name, 8);
3141 memcpy(&p_sysval->WS_name, remote_name, 8);
3142 if (privptr->p_env->packing > 0) {
3143 /* How big is the biggest packet */
3144 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
3145 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
3146 } else {
3147 memset(&p_connect->reserved1, 0x00, 4);
3148 memset(&p_connect->reserved2, 0x00, 4);
3149 }
3150 break;
3151 default:
3152 break;
3153 }
3154
3155 /* write Control Record to the device */
3156
3157
3158 skb = dev_alloc_skb(sizeof(struct clawctl));
3159 if (!skb) {
3160 printk( "%s:%s low on mem, returning...\n",
3161 dev->name,__FUNCTION__);
3162#ifdef DEBUG
3163 printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
3164 dev->name,__FUNCTION__);
3165#endif
3166 return -ENOMEM;
3167 }
3168 memcpy(skb_put(skb, sizeof(struct clawctl)),
3169 p_ctl, sizeof(struct clawctl));
3170#ifdef IOTRACE
3171 printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
3172 dumpit((char *)p_ctl,sizeof(struct clawctl));
3173#endif
3174 if (privptr->p_env->packing >= PACK_SEND)
3175 claw_hw_tx(skb, dev, 1);
3176 else
3177 claw_hw_tx(skb, dev, 0);
3178#ifdef FUNCTRACE
3179 printk(KERN_INFO "%s:%s Exit on line %d\n",
3180 dev->name,__FUNCTION__,__LINE__);
3181#endif
3182
3183 return 0;
3184} /* end of claw_send_control */
3185
3186/*-------------------------------------------------------------------*
3187* claw_snd_conn_req *
3188* *
3189*--------------------------------------------------------------------*/
3190static int
3191claw_snd_conn_req(struct net_device *dev, __u8 link)
3192{
3193 int rc;
3194 struct claw_privbk *privptr=dev->priv;
3195 struct clawctl *p_ctl;
3196
3197#ifdef FUNCTRACE
3198 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3199#endif
3200 CLAW_DBF_TEXT(2,setup,"snd_conn");
3201#ifdef DEBUGMSG
3202 printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
3203 dumpit((char *) dev, sizeof(struct net_device));
3204#endif
3205 rc = 1;
3206 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3207 p_ctl->linkid = link;
3208 if ( privptr->system_validate_comp==0x00 ) {
3209#ifdef FUNCTRACE
3210 printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
3211 dev->name,__FUNCTION__,__LINE__);
3212#endif
3213 return rc;
3214 }
3215 if (privptr->p_env->packing == PACKING_ASK )
3216 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3217 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
3218 if (privptr->p_env->packing == PACK_SEND) {
3219 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3220 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
3221 }
3222 if (privptr->p_env->packing == 0)
3223 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3224 HOST_APPL_NAME, privptr->p_env->api_type);
3225#ifdef FUNCTRACE
3226 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3227 dev->name,__FUNCTION__,__LINE__, rc);
3228#endif
3229 return rc;
3230
3231} /* end of claw_snd_conn_req */
3232
3233
3234/*-------------------------------------------------------------------*
3235* claw_snd_disc *
3236* *
3237*--------------------------------------------------------------------*/
3238
3239static int
3240claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
3241{
3242 int rc;
3243 struct conncmd * p_connect;
3244
3245#ifdef FUNCTRACE
3246 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3247#endif
3248 CLAW_DBF_TEXT(2,setup,"snd_dsc");
3249#ifdef DEBUGMSG
3250 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3251 dumpit((char *) dev, sizeof(struct net_device));
3252 printk(KERN_INFO "%s: variable p_ctl",dev->name);
3253 dumpit((char *) p_ctl, sizeof(struct clawctl));
3254#endif
3255 p_connect=(struct conncmd *)&p_ctl->data;
3256
3257 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
3258 p_ctl->correlator, 0,
3259 p_connect->host_name, p_connect->WS_name);
3260#ifdef FUNCTRACE
3261 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3262 dev->name,__FUNCTION__, __LINE__, rc);
3263#endif
3264 return rc;
3265} /* end of claw_snd_disc */
3266
3267
3268/*-------------------------------------------------------------------*
3269* claw_snd_sys_validate_rsp *
3270* *
3271*--------------------------------------------------------------------*/
3272
3273static int
3274claw_snd_sys_validate_rsp(struct net_device *dev,
3275 struct clawctl *p_ctl, __u32 return_code)
3276{
3277 struct claw_env * p_env;
3278 struct claw_privbk *privptr;
3279 int rc;
3280
3281#ifdef FUNCTRACE
3282 printk(KERN_INFO "%s:%s Enter\n",
3283 dev->name,__FUNCTION__);
3284#endif
3285 CLAW_DBF_TEXT(2,setup,"chkresp");
3286#ifdef DEBUGMSG
3287 printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
3288 dev->name, return_code);
3289 dumpit((char *) dev, sizeof(struct net_device));
3290 printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
3291 dumpit((char *) p_ctl, sizeof(struct clawctl));
3292#endif
3293 privptr = dev->priv;
3294 p_env=privptr->p_env;
3295 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
3296 p_ctl->linkid,
3297 p_ctl->correlator,
3298 return_code,
3299 p_env->host_name,
3300 p_env->adapter_name );
3301#ifdef FUNCTRACE
3302 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3303 dev->name,__FUNCTION__,__LINE__, rc);
3304#endif
3305 return rc;
3306} /* end of claw_snd_sys_validate_rsp */
3307
3308/*-------------------------------------------------------------------*
3309* claw_strt_conn_req *
3310* *
3311*--------------------------------------------------------------------*/
3312
3313static int
3314claw_strt_conn_req(struct net_device *dev )
3315{
3316 int rc;
3317
3318#ifdef FUNCTRACE
3319 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3320#endif
3321 CLAW_DBF_TEXT(2,setup,"conn_req");
3322#ifdef DEBUGMSG
3323 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3324 dumpit((char *) dev, sizeof(struct net_device));
3325#endif
3326 rc=claw_snd_conn_req(dev, 1);
3327#ifdef FUNCTRACE
3328 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3329 dev->name,__FUNCTION__,__LINE__, rc);
3330#endif
3331 return rc;
3332} /* end of claw_strt_conn_req */
3333
3334
3335
3336/*-------------------------------------------------------------------*
3337 * claw_stats *
3338 *-------------------------------------------------------------------*/
3339
3340static struct
3341net_device_stats *claw_stats(struct net_device *dev)
3342{
3343 struct claw_privbk *privptr;
3344#ifdef FUNCTRACE
3345 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3346#endif
3347 CLAW_DBF_TEXT(4,trace,"stats");
3348 privptr = dev->priv;
3349#ifdef FUNCTRACE
3350 printk(KERN_INFO "%s:%s Exit on line %d\n",
3351 dev->name,__FUNCTION__,__LINE__);
3352#endif
3353 return &privptr->stats;
3354} /* end of claw_stats */
3355
3356
3357/*-------------------------------------------------------------------*
3358* unpack_read *
3359* *
3360*--------------------------------------------------------------------*/
3361static void
3362unpack_read(struct net_device *dev )
3363{
3364 struct sk_buff *skb;
3365 struct claw_privbk *privptr;
3366 struct claw_env *p_env;
3367 struct ccwbk *p_this_ccw;
3368 struct ccwbk *p_first_ccw;
3369 struct ccwbk *p_last_ccw;
3370 struct clawph *p_packh;
3371 void *p_packd;
3372 struct clawctl *p_ctlrec=NULL;
3373
3374 __u32 len_of_data;
3375 __u32 pack_off;
3376 __u8 link_num;
3377 __u8 mtc_this_frm=0;
3378 __u32 bytes_to_mov;
3379 struct chbk *p_ch = NULL;
3380 int i=0;
3381 int p=0;
3382
3383#ifdef FUNCTRACE
3384 printk(KERN_INFO "%s:%s enter \n",dev->name,__FUNCTION__);
3385#endif
3386 CLAW_DBF_TEXT(4,trace,"unpkread");
3387 p_first_ccw=NULL;
3388 p_last_ccw=NULL;
3389 p_packh=NULL;
3390 p_packd=NULL;
3391 privptr=dev->priv;
3392 p_env = privptr->p_env;
3393 p_this_ccw=privptr->p_read_active_first;
3394 i=0;
3395 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
3396#ifdef IOTRACE
3397 printk(KERN_INFO "%s p_this_ccw \n",dev->name);
3398 dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
3399 printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
3400 " pk=%d \n",dev->name,p_env->packing);
3401 dumpit((char *)p_this_ccw->p_buffer, 64 );
3402#endif
3403 pack_off = 0;
3404 p = 0;
3405 p_this_ccw->header.flag=CLAW_PENDING;
3406 privptr->p_read_active_first=p_this_ccw->next;
3407 p_this_ccw->next=NULL;
3408 p_packh = (struct clawph *)p_this_ccw->p_buffer;
3409 if ((p_env->packing == PACK_SEND) &&
3410 (p_packh->len == 32) &&
3411 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
3412 p_packh++; /* peek past pack header */
3413 p_ctlrec = (struct clawctl *)p_packh;
3414 p_packh--; /* un peek */
3415 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
3416 (p_ctlrec->command == CONNECTION_CONFIRM))
3417 p_env->packing = DO_PACKED;
3418 }
3419 if (p_env->packing == DO_PACKED)
3420 link_num=p_packh->link_num;
3421 else
3422 link_num=p_this_ccw->header.opcode / 8;
3423 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
3424#ifdef DEBUGMSG
3425 printk(KERN_INFO "%s: %s > More_to_come is ON\n",
3426 dev->name,__FUNCTION__);
3427#endif
3428 mtc_this_frm=1;
3429 if (p_this_ccw->header.length!=
3430 privptr->p_env->read_size ) {
3431 printk(KERN_INFO " %s: Invalid frame detected "
3432 "length is %02x\n" ,
3433 dev->name, p_this_ccw->header.length);
3434 }
3435 }
3436
3437 if (privptr->mtc_skipping) {
3438 /*
3439 * We're in the mode of skipping past a
3440 * multi-frame message
3441 * that we can't process for some reason or other.
3442 * The first frame without the More-To-Come flag is
3443 * the last frame of the skipped message.
3444 */
3445 /* in case of More-To-Come not set in this frame */
3446 if (mtc_this_frm==0) {
3447 privptr->mtc_skipping=0; /* Ok, the end */
3448 privptr->mtc_logical_link=-1;
3449 }
3450#ifdef DEBUGMSG
3451 printk(KERN_INFO "%s:%s goto next "
3452 "frame from MoretoComeSkip \n",
3453 dev->name,__FUNCTION__);
3454#endif
3455 goto NextFrame;
3456 }
3457
3458 if (link_num==0) {
3459 claw_process_control(dev, p_this_ccw);
3460#ifdef DEBUGMSG
3461 printk(KERN_INFO "%s:%s goto next "
3462 "frame from claw_process_control \n",
3463 dev->name,__FUNCTION__);
3464#endif
3465 CLAW_DBF_TEXT(4,trace,"UnpkCntl");
3466 goto NextFrame;
3467 }
3468unpack_next:
3469 if (p_env->packing == DO_PACKED) {
3470 if (pack_off > p_env->read_size)
3471 goto NextFrame;
3472 p_packd = p_this_ccw->p_buffer+pack_off;
3473 p_packh = (struct clawph *) p_packd;
3474 if ((p_packh->len == 0) || /* all done with this frame? */
3475 (p_packh->flag != 0))
3476 goto NextFrame;
3477 bytes_to_mov = p_packh->len;
3478 pack_off += bytes_to_mov+sizeof(struct clawph);
3479 p++;
3480 } else {
3481 bytes_to_mov=p_this_ccw->header.length;
3482 }
3483 if (privptr->mtc_logical_link<0) {
3484#ifdef DEBUGMSG
3485 printk(KERN_INFO "%s: %s mtc_logical_link < 0 \n",
3486 dev->name,__FUNCTION__);
3487#endif
3488
3489 /*
3490 * if More-To-Come is set in this frame then we don't know
3491 * length of entire message, and hence have to allocate
3492 * large buffer */
3493
3494 /* We are starting a new envelope */
3495 privptr->mtc_offset=0;
3496 privptr->mtc_logical_link=link_num;
3497 }
3498
3499 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
3500 /* error */
3501#ifdef DEBUGMSG
3502 printk(KERN_INFO "%s: %s > goto next "
3503 "frame from MoretoComeSkip \n",
3504 dev->name,
3505 __FUNCTION__);
3506 printk(KERN_INFO " bytes_to_mov %d > (MAX_ENVELOPE_"
3507 "SIZE-privptr->mtc_offset %d)\n",
3508 bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
3509#endif
3510 privptr->stats.rx_frame_errors++;
3511 goto NextFrame;
3512 }
3513 if (p_env->packing == DO_PACKED) {
3514 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3515 p_packd+sizeof(struct clawph), bytes_to_mov);
3516
3517 } else {
3518 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3519 p_this_ccw->p_buffer, bytes_to_mov);
3520 }
3521#ifdef DEBUGMSG
3522 printk(KERN_INFO "%s: %s() received data \n",
3523 dev->name,__FUNCTION__);
3524 if (p_env->packing == DO_PACKED)
3525 dumpit((char *)p_packd+sizeof(struct clawph),32);
3526 else
3527 dumpit((char *)p_this_ccw->p_buffer, 32);
3528 printk(KERN_INFO "%s: %s() bytelength %d \n",
3529 dev->name,__FUNCTION__,bytes_to_mov);
3530#endif
3531 if (mtc_this_frm==0) {
3532 len_of_data=privptr->mtc_offset+bytes_to_mov;
3533 skb=dev_alloc_skb(len_of_data);
3534 if (skb) {
3535 memcpy(skb_put(skb,len_of_data),
3536 privptr->p_mtc_envelope,
3537 len_of_data);
3538 skb->mac.raw=skb->data;
3539 skb->dev=dev;
3540 skb->protocol=htons(ETH_P_IP);
3541 skb->ip_summed=CHECKSUM_UNNECESSARY;
3542 privptr->stats.rx_packets++;
3543 privptr->stats.rx_bytes+=len_of_data;
3544 netif_rx(skb);
3545#ifdef DEBUGMSG
3546 printk(KERN_INFO "%s: %s() netif_"
3547 "rx(skb) completed \n",
3548 dev->name,__FUNCTION__);
3549#endif
3550 }
3551 else {
3552 privptr->stats.rx_dropped++;
3553 printk(KERN_WARNING "%s: %s() low on memory\n",
3554 dev->name,__FUNCTION__);
3555 }
3556 privptr->mtc_offset=0;
3557 privptr->mtc_logical_link=-1;
3558 }
3559 else {
3560 privptr->mtc_offset+=bytes_to_mov;
3561 }
3562 if (p_env->packing == DO_PACKED)
3563 goto unpack_next;
3564NextFrame:
3565 /*
3566 * Remove ThisCCWblock from active read queue, and add it
3567 * to queue of free blocks to be reused.
3568 */
3569 i++;
3570 p_this_ccw->header.length=0xffff;
3571 p_this_ccw->header.opcode=0xff;
3572 /*
3573 * add this one to the free queue for later reuse
3574 */
3575 if (p_first_ccw==NULL) {
3576 p_first_ccw = p_this_ccw;
3577 }
3578 else {
3579 p_last_ccw->next = p_this_ccw;
3580 }
3581 p_last_ccw = p_this_ccw;
3582 /*
3583 * chain to next block on active read queue
3584 */
3585 p_this_ccw = privptr->p_read_active_first;
3586 CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
3587 } /* end of while */
3588
3589 /* check validity */
3590
3591#ifdef IOTRACE
3592 printk(KERN_INFO "%s:%s processed frame is %d \n",
3593 dev->name,__FUNCTION__,i);
3594 printk(KERN_INFO "%s:%s F:%lx L:%lx\n",
3595 dev->name,
3596 __FUNCTION__,
3597 (unsigned long)p_first_ccw,
3598 (unsigned long)p_last_ccw);
3599#endif
3600 CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
3601 add_claw_reads(dev, p_first_ccw, p_last_ccw);
3602 p_ch=&privptr->channel[READ];
3603 claw_strt_read(dev, LOCK_YES);
3604#ifdef FUNCTRACE
3605 printk(KERN_INFO "%s: %s exit on line %d\n",
3606 dev->name, __FUNCTION__, __LINE__);
3607#endif
3608 return;
3609} /* end of unpack_read */
3610
3611/*-------------------------------------------------------------------*
3612* claw_strt_read *
3613* *
3614*--------------------------------------------------------------------*/
3615static void
3616claw_strt_read (struct net_device *dev, int lock )
3617{
3618 int rc = 0;
3619 __u32 parm;
3620 unsigned long saveflags = 0;
3621 struct claw_privbk *privptr=dev->priv;
3622 struct ccwbk*p_ccwbk;
3623 struct chbk *p_ch;
3624 struct clawh *p_clawh;
3625 p_ch=&privptr->channel[READ];
3626
3627#ifdef FUNCTRACE
3628 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3629 printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
3630 dumpit((char *) dev, sizeof(struct net_device));
3631#endif
3632 CLAW_DBF_TEXT(4,trace,"StRdNter");
3633 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3634 p_clawh->flag=CLAW_IDLE; /* 0x00 */
3635
3636 if ((privptr->p_write_active_first!=NULL &&
3637 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
3638 (privptr->p_read_active_first!=NULL &&
3639 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
3640 p_clawh->flag=CLAW_BUSY; /* 0xff */
3641 }
3642#ifdef DEBUGMSG
3643 printk(KERN_INFO "%s:%s state-%02x\n" ,
3644 dev->name,__FUNCTION__, p_ch->claw_state);
3645#endif
3646 if (lock==LOCK_YES) {
3647 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
3648 }
3649 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3650#ifdef DEBUGMSG
3651 printk(KERN_INFO "%s: HOT READ started in %s\n" ,
3652 dev->name,__FUNCTION__);
3653 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3654 dumpit((char *)&p_clawh->flag , 1);
3655#endif
3656 CLAW_DBF_TEXT(4,trace,"HotRead");
3657 p_ccwbk=privptr->p_read_active_first;
3658 parm = (unsigned long) p_ch;
3659 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
3660 0xff, 0);
3661 if (rc != 0) {
3662 ccw_check_return_code(p_ch->cdev, rc);
3663 }
3664 }
3665 else {
3666#ifdef DEBUGMSG
3667 printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
3668 dev->name,__FUNCTION__);
3669#endif
3670 CLAW_DBF_TEXT(2,trace,"ReadAct");
3671 }
3672
3673 if (lock==LOCK_YES) {
3674 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
3675 }
3676#ifdef FUNCTRACE
3677 printk(KERN_INFO "%s:%s Exit on line %d\n",
3678 dev->name,__FUNCTION__,__LINE__);
3679#endif
3680 CLAW_DBF_TEXT(4,trace,"StRdExit");
3681 return;
3682} /* end of claw_strt_read */
3683
3684/*-------------------------------------------------------------------*
3685* claw_strt_out_IO *
3686* *
3687*--------------------------------------------------------------------*/
3688
3689static void
3690claw_strt_out_IO( struct net_device *dev )
3691{
3692 int rc = 0;
3693 unsigned long parm;
3694 struct claw_privbk *privptr;
3695 struct chbk *p_ch;
3696 struct ccwbk *p_first_ccw;
3697
3698#ifdef FUNCTRACE
3699 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3700#endif
3701 if (!dev) {
3702 return;
3703 }
3704 privptr=(struct claw_privbk *)dev->priv;
3705 p_ch=&privptr->channel[WRITE];
3706
3707#ifdef DEBUGMSG
3708 printk(KERN_INFO "%s:%s state-%02x\n" ,
3709 dev->name,__FUNCTION__,p_ch->claw_state);
3710#endif
3711 CLAW_DBF_TEXT(4,trace,"strt_io");
3712 p_first_ccw=privptr->p_write_active_first;
3713
3714 if (p_ch->claw_state == CLAW_STOP)
3715 return;
3716 if (p_first_ccw == NULL) {
3717#ifdef FUNCTRACE
3718 printk(KERN_INFO "%s:%s Exit on line %d\n",
3719 dev->name,__FUNCTION__,__LINE__);
3720#endif
3721 return;
3722 }
3723 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3724 parm = (unsigned long) p_ch;
3725#ifdef DEBUGMSG
3726 printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
3727 dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
3728#endif
3729 CLAW_DBF_TEXT(2,trace,"StWrtIO");
3730 rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
3731 0xff, 0);
3732 if (rc != 0) {
3733 ccw_check_return_code(p_ch->cdev, rc);
3734 }
3735 }
3736 dev->trans_start = jiffies;
3737#ifdef FUNCTRACE
3738 printk(KERN_INFO "%s:%s Exit on line %d\n",
3739 dev->name,__FUNCTION__,__LINE__);
3740#endif
3741
3742 return;
3743} /* end of claw_strt_out_IO */
3744
3745/*-------------------------------------------------------------------*
3746* Free write buffers *
3747* *
3748*--------------------------------------------------------------------*/
3749
3750static void
3751claw_free_wrt_buf( struct net_device *dev )
3752{
3753
3754 struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
3755 struct ccwbk*p_first_ccw;
3756 struct ccwbk*p_last_ccw;
3757 struct ccwbk*p_this_ccw;
3758 struct ccwbk*p_next_ccw;
3759#ifdef IOTRACE
3760 struct ccwbk*p_buf;
3761#endif
3762#ifdef FUNCTRACE
3763 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3764 printk(KERN_INFO "%s: free count = %d variable dev =\n",
3765 dev->name,privptr->write_free_count);
3766#endif
3767 CLAW_DBF_TEXT(4,trace,"freewrtb");
3768 /* scan the write queue to free any completed write packets */
3769 p_first_ccw=NULL;
3770 p_last_ccw=NULL;
3771#ifdef IOTRACE
3772 printk(KERN_INFO "%s: Dump current CCW chain \n",dev->name );
3773 p_buf=privptr->p_write_active_first;
3774 while (p_buf!=NULL) {
3775 dumpit((char *)p_buf, sizeof(struct ccwbk));
3776 p_buf=p_buf->next;
3777 }
3778 if (p_buf==NULL) {
3779 printk(KERN_INFO "%s: privptr->p_write_"
3780 "active_first==NULL\n",dev->name );
3781 }
3782 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3783 dumpit((char *)p_buf, sizeof(struct endccw));
3784#endif
3785 p_this_ccw=privptr->p_write_active_first;
3786 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
3787 {
3788 p_next_ccw = p_this_ccw->next;
3789 if (((p_next_ccw!=NULL) &&
3790 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
3791 ((p_this_ccw == privptr->p_write_active_last) &&
3792 (p_this_ccw->header.flag!=CLAW_PENDING))) {
3793 /* The next CCW is OK or this is */
3794 /* the last CCW...free it @A1A */
3795 privptr->p_write_active_first=p_this_ccw->next;
3796 p_this_ccw->header.flag=CLAW_PENDING;
3797 p_this_ccw->next=privptr->p_write_free_chain;
3798 privptr->p_write_free_chain=p_this_ccw;
3799 ++privptr->write_free_count;
3800 privptr->stats.tx_bytes+= p_this_ccw->write.count;
3801 p_this_ccw=privptr->p_write_active_first;
3802 privptr->stats.tx_packets++;
3803 }
3804 else {
3805 break;
3806 }
3807 }
3808 if (privptr->write_free_count!=0) {
3809 claw_clearbit_busy(TB_NOBUFFER,dev);
3810 }
3811 /* whole chain removed? */
3812 if (privptr->p_write_active_first==NULL) {
3813 privptr->p_write_active_last=NULL;
3814#ifdef DEBUGMSG
3815 printk(KERN_INFO "%s:%s p_write_"
3816 "active_first==NULL\n",dev->name,__FUNCTION__);
3817#endif
3818 }
3819#ifdef IOTRACE
3820 printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name );
3821 p_buf=privptr->p_write_active_first;
3822 while (p_buf!=NULL) {
3823 dumpit((char *)p_buf, sizeof(struct ccwbk));
3824 p_buf=p_buf->next;
3825 }
3826 if (p_buf==NULL) {
3827 printk(KERN_INFO "%s: privptr->p_write_active_"
3828 "first==NULL\n",dev->name );
3829 }
3830 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3831 dumpit((char *)p_buf, sizeof(struct endccw));
3832#endif
3833
3834 CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
3835#ifdef FUNCTRACE
3836 printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
3837 dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
3838#endif
3839 return;
3840}
3841
3842/*-------------------------------------------------------------------*
3843* claw free netdevice *
3844* *
3845*--------------------------------------------------------------------*/
3846static void
3847claw_free_netdevice(struct net_device * dev, int free_dev)
3848{
3849 struct claw_privbk *privptr;
3850#ifdef FUNCTRACE
3851 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3852#endif
3853 CLAW_DBF_TEXT(2,setup,"free_dev");
3854
3855 if (!dev)
3856 return;
3857 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3858 privptr = dev->priv;
3859 if (dev->flags & IFF_RUNNING)
3860 claw_release(dev);
3861 if (privptr) {
3862 privptr->channel[READ].ndev = NULL; /* say it's free */
3863 }
3864 dev->priv=NULL;
3865#ifdef MODULE
3866 if (free_dev) {
3867 free_netdev(dev);
3868 }
3869#endif
3870 CLAW_DBF_TEXT(2,setup,"feee_ok");
3871#ifdef FUNCTRACE
3872 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3873#endif
3874}
3875
3876/**
3877 * Claw init netdevice
3878 * Initialize everything of the net device except the name and the
3879 * channel structs.
3880 */
3881static void
3882claw_init_netdevice(struct net_device * dev)
3883{
3884#ifdef FUNCTRACE
3885 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3886#endif
3887 CLAW_DBF_TEXT(2,setup,"init_dev");
3888 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3889 if (!dev) {
3890 printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
3891 __FUNCTION__,__LINE__);
3892 CLAW_DBF_TEXT(2,setup,"baddev");
3893 return;
3894 }
3895 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
3896 dev->hard_start_xmit = claw_tx;
3897 dev->open = claw_open;
3898 dev->stop = claw_release;
3899 dev->get_stats = claw_stats;
3900 dev->change_mtu = claw_change_mtu;
3901 dev->hard_header_len = 0;
3902 dev->addr_len = 0;
3903 dev->type = ARPHRD_SLIP;
3904 dev->tx_queue_len = 1300;
3905 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
3906 SET_MODULE_OWNER(dev);
3907#ifdef FUNCTRACE
3908 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3909#endif
3910 CLAW_DBF_TEXT(2,setup,"initok");
3911 return;
3912}
3913
3914/**
3915 * Init a new channel in the privptr->channel[i].
3916 *
3917 * @param cdev The ccw_device to be added.
3918 *
3919 * @return 0 on success, !0 on error.
3920 */
3921static int
3922add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
3923{
3924 struct chbk *p_ch;
3925
3926#ifdef FUNCTRACE
3927 printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
3928#endif
3929 CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
3930 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
3931 p_ch = &privptr->channel[i];
3932 p_ch->cdev = cdev;
3933 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
3934 sscanf(cdev->dev.bus_id+4,"%x",&p_ch->devno);
3935 if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
3936 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
3937 p_ch->id,__FUNCTION__);
3938#ifdef FUNCTRACE
3939 printk(KERN_INFO "%s:%s Exit on line %d\n",
3940 p_ch->id,__FUNCTION__,__LINE__);
3941#endif
3942 return -ENOMEM;
3943 }
3944 memset(p_ch->irb, 0, sizeof (struct irb));
3945#ifdef FUNCTRACE
3946 printk(KERN_INFO "%s:%s Exit on line %d\n",
3947 cdev->dev.bus_id,__FUNCTION__,__LINE__);
3948#endif
3949 return 0;
3950}
3951
3952
3953/**
3954 *
3955 * Setup an interface.
3956 *
3957 * @param cgdev Device to be setup.
3958 *
3959 * @returns 0 on success, !0 on failure.
3960 */
3961static int
3962claw_new_device(struct ccwgroup_device *cgdev)
3963{
3964 struct claw_privbk *privptr;
3965 struct claw_env *p_env;
3966 struct net_device *dev;
3967 int ret;
3968
3969 pr_debug("%s() called\n", __FUNCTION__);
3970 printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
3971 CLAW_DBF_TEXT(2,setup,"new_dev");
3972 privptr = cgdev->dev.driver_data;
3973 cgdev->cdev[READ]->dev.driver_data = privptr;
3974 cgdev->cdev[WRITE]->dev.driver_data = privptr;
3975 if (!privptr)
3976 return -ENODEV;
3977 p_env = privptr->p_env;
3978 sscanf(cgdev->cdev[READ]->dev.bus_id+4,"%x",
3979 &p_env->devno[READ]);
3980 sscanf(cgdev->cdev[WRITE]->dev.bus_id+4,"%x",
3981 &p_env->devno[WRITE]);
3982 ret = add_channel(cgdev->cdev[0],0,privptr);
3983 if (ret == 0)
3984 ret = add_channel(cgdev->cdev[1],1,privptr);
3985 if (ret != 0) {
3986 printk(KERN_WARNING
3987 "add channel failed "
3988 "with ret = %d\n", ret);
3989 goto out;
3990 }
3991 ret = ccw_device_set_online(cgdev->cdev[READ]);
3992 if (ret != 0) {
3993 printk(KERN_WARNING
3994 "claw: ccw_device_set_online %s READ failed "
3995 "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
3996 goto out;
3997 }
3998 ret = ccw_device_set_online(cgdev->cdev[WRITE]);
3999 if (ret != 0) {
4000 printk(KERN_WARNING
4001 "claw: ccw_device_set_online %s WRITE failed "
4002 "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
4003 goto out;
4004 }
4005 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
4006 if (!dev) {
4007 printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
4008 goto out;
4009 }
4010 dev->priv = privptr;
4011 cgdev->dev.driver_data = privptr;
4012 cgdev->cdev[READ]->dev.driver_data = privptr;
4013 cgdev->cdev[WRITE]->dev.driver_data = privptr;
4014 /* sysfs magic */
4015 SET_NETDEV_DEV(dev, &cgdev->dev);
4016 if (register_netdev(dev) != 0) {
4017 claw_free_netdevice(dev, 1);
4018 CLAW_DBF_TEXT(2,trace,"regfail");
4019 goto out;
4020 }
4021 dev->flags &=~IFF_RUNNING;
4022 if (privptr->buffs_alloc == 0) {
4023 ret=init_ccw_bk(dev);
4024 if (ret !=0) {
4025 printk(KERN_WARNING
4026 "claw: init_ccw_bk failed with ret=%d\n", ret);
4027 unregister_netdev(dev);
4028 claw_free_netdevice(dev,1);
4029 CLAW_DBF_TEXT(2,trace,"ccwmem");
4030 goto out;
4031 }
4032 }
4033 privptr->channel[READ].ndev = dev;
4034 privptr->channel[WRITE].ndev = dev;
4035 privptr->p_env->ndev = dev;
4036
4037 printk(KERN_INFO "%s:readsize=%d writesize=%d "
4038 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
4039 dev->name, p_env->read_size,
4040 p_env->write_size, p_env->read_buffers,
4041 p_env->write_buffers, p_env->devno[READ],
4042 p_env->devno[WRITE]);
4043 printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
4044 ":%.8s api_type: %.8s\n",
4045 dev->name, p_env->host_name,
4046 p_env->adapter_name , p_env->api_type);
4047 return 0;
4048out:
4049 ccw_device_set_offline(cgdev->cdev[1]);
4050 ccw_device_set_offline(cgdev->cdev[0]);
4051
4052 return -ENODEV;
4053}
4054
4055static void
4056claw_purge_skb_queue(struct sk_buff_head *q)
4057{
4058 struct sk_buff *skb;
4059
4060 CLAW_DBF_TEXT(4,trace,"purgque");
4061
4062 while ((skb = skb_dequeue(q))) {
4063 atomic_dec(&skb->users);
4064 dev_kfree_skb_irq(skb);
4065 }
4066}
4067
4068/**
4069 * Shutdown an interface.
4070 *
4071 * @param cgdev Device to be shut down.
4072 *
4073 * @returns 0 on success, !0 on failure.
4074 */
4075static int
4076claw_shutdown_device(struct ccwgroup_device *cgdev)
4077{
4078 struct claw_privbk *priv;
4079 struct net_device *ndev;
4080 int ret;
4081
4082 pr_debug("%s() called\n", __FUNCTION__);
4083 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4084 priv = cgdev->dev.driver_data;
4085 if (!priv)
4086 return -ENODEV;
4087 ndev = priv->channel[READ].ndev;
4088 if (ndev) {
4089 /* Close the device */
4090 printk(KERN_INFO
4091 "%s: shuting down \n",ndev->name);
4092 if (ndev->flags & IFF_RUNNING)
4093 ret = claw_release(ndev);
4094 ndev->flags &=~IFF_RUNNING;
4095 unregister_netdev(ndev);
4096 ndev->priv = NULL; /* cgdev data, not ndev's to free */
4097 claw_free_netdevice(ndev, 1);
4098 priv->channel[READ].ndev = NULL;
4099 priv->channel[WRITE].ndev = NULL;
4100 priv->p_env->ndev = NULL;
4101 }
4102 ccw_device_set_offline(cgdev->cdev[1]);
4103 ccw_device_set_offline(cgdev->cdev[0]);
4104 return 0;
4105}
4106
4107static void
4108claw_remove_device(struct ccwgroup_device *cgdev)
4109{
4110 struct claw_privbk *priv;
4111
4112 pr_debug("%s() called\n", __FUNCTION__);
4113 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4114 priv = cgdev->dev.driver_data;
4115 if (!priv) {
4116 printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
4117 return;
4118 }
4119 printk(KERN_INFO "claw: %s() called %s will be removed.\n",
4120 __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
4121 if (cgdev->state == CCWGROUP_ONLINE)
4122 claw_shutdown_device(cgdev);
4123 claw_remove_files(&cgdev->dev);
4124 if (priv->p_mtc_envelope!=NULL) {
4125 kfree(priv->p_mtc_envelope);
4126 priv->p_mtc_envelope=NULL;
4127 }
4128 if (priv->p_env != NULL) {
4129 kfree(priv->p_env);
4130 priv->p_env=NULL;
4131 }
4132 if (priv->channel[0].irb != NULL) {
4133 kfree(priv->channel[0].irb);
4134 priv->channel[0].irb=NULL;
4135 }
4136 if (priv->channel[1].irb != NULL) {
4137 kfree(priv->channel[1].irb);
4138 priv->channel[1].irb=NULL;
4139 }
4140 kfree(priv);
4141 cgdev->dev.driver_data=NULL;
4142 cgdev->cdev[READ]->dev.driver_data = NULL;
4143 cgdev->cdev[WRITE]->dev.driver_data = NULL;
4144 put_device(&cgdev->dev);
4145}
4146
4147
4148/*
4149 * sysfs attributes
4150 */
4151static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4152claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4153{
4154 struct claw_privbk *priv;
4155 struct claw_env * p_env;
4156
4157 priv = dev->driver_data;
4158 if (!priv)
4159 return -ENODEV;
4160 p_env = priv->p_env;
4161 return sprintf(buf, "%s\n",p_env->host_name);
4162}
4163
4164static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4165claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4166{
4167 struct claw_privbk *priv;
4168 struct claw_env * p_env;
4169
4170 priv = dev->driver_data;
4171 if (!priv)
4172 return -ENODEV;
4173 p_env = priv->p_env;
4174 if (count > MAX_NAME_LEN+1)
4175 return -EINVAL;
4176 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
4177 strncpy(p_env->host_name,buf, count);
4178 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
4179 p_env->host_name[MAX_NAME_LEN] = 0x00;
4180 CLAW_DBF_TEXT(2,setup,"HstnSet");
4181 CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
4182
4183 return count;
4184}
4185
4186static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
4187
4188static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4189claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4190{
4191 struct claw_privbk *priv;
4192 struct claw_env * p_env;
4193
4194 priv = dev->driver_data;
4195 if (!priv)
4196 return -ENODEV;
4197 p_env = priv->p_env;
4198 return sprintf(buf, "%s\n",p_env->adapter_name);
4199}
4200
4201static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4202claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4203{
4204 struct claw_privbk *priv;
4205 struct claw_env * p_env;
4206
4207 priv = dev->driver_data;
4208 if (!priv)
4209 return -ENODEV;
4210 p_env = priv->p_env;
4211 if (count > MAX_NAME_LEN+1)
4212 return -EINVAL;
4213 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
4214 strncpy(p_env->adapter_name,buf, count);
4215 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
4216 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
4217 CLAW_DBF_TEXT(2,setup,"AdnSet");
4218 CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
4219
4220 return count;
4221}
4222
4223static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
4224
4225static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4226claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4227{
4228 struct claw_privbk *priv;
4229 struct claw_env * p_env;
4230
4231 priv = dev->driver_data;
4232 if (!priv)
4233 return -ENODEV;
4234 p_env = priv->p_env;
4235 return sprintf(buf, "%s\n",
4236 p_env->api_type);
4237}
4238
4239static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4240claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4241{
4242 struct claw_privbk *priv;
4243 struct claw_env * p_env;
4244
4245 priv = dev->driver_data;
4246 if (!priv)
4247 return -ENODEV;
4248 p_env = priv->p_env;
4249 if (count > MAX_NAME_LEN+1)
4250 return -EINVAL;
4251 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
4252 strncpy(p_env->api_type,buf, count);
4253 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
4254 p_env->api_type[MAX_NAME_LEN] = 0x00;
4255 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
4256 p_env->read_size=DEF_PACK_BUFSIZE;
4257 p_env->write_size=DEF_PACK_BUFSIZE;
4258 p_env->packing=PACKING_ASK;
4259 CLAW_DBF_TEXT(2,setup,"PACKING");
4260 }
4261 else {
4262 p_env->packing=0;
4263 p_env->read_size=CLAW_FRAME_SIZE;
4264 p_env->write_size=CLAW_FRAME_SIZE;
4265 CLAW_DBF_TEXT(2,setup,"ApiSet");
4266 }
4267 CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
4268 return count;
4269}
4270
4271static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
4272
4273static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4274claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4275{
4276 struct claw_privbk *priv;
4277 struct claw_env * p_env;
4278
4279 priv = dev->driver_data;
4280 if (!priv)
4281 return -ENODEV;
4282 p_env = priv->p_env;
4283 return sprintf(buf, "%d\n", p_env->write_buffers);
4284}
4285
4286static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4287claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4288{
4289 struct claw_privbk *priv;
4290 struct claw_env * p_env;
4291 int nnn,max;
4292
4293 priv = dev->driver_data;
4294 if (!priv)
4295 return -ENODEV;
4296 p_env = priv->p_env;
4297 sscanf(buf, "%i", &nnn);
4298 if (p_env->packing) {
4299 max = 64;
4300 }
4301 else {
4302 max = 512;
4303 }
4304 if ((nnn > max ) || (nnn < 2))
4305 return -EINVAL;
4306 p_env->write_buffers = nnn;
4307 CLAW_DBF_TEXT(2,setup,"Wbufset");
4308 CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
4309 return count;
4310}
4311
4312static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
4313
4314static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4315claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4316{
4317 struct claw_privbk *priv;
4318 struct claw_env * p_env;
4319
4320 priv = dev->driver_data;
4321 if (!priv)
4322 return -ENODEV;
4323 p_env = priv->p_env;
4324 return sprintf(buf, "%d\n", p_env->read_buffers);
4325}
4326
4327static ssize_t
Yani Ioannou3fd3c0a2005-05-17 06:43:27 -0400[diff] [blame]4328claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]4329{
4330 struct claw_privbk *priv;
4331 struct claw_env *p_env;
4332 int nnn,max;
4333
4334 priv = dev->driver_data;
4335 if (!priv)
4336 return -ENODEV;
4337 p_env = priv->p_env;
4338 sscanf(buf, "%i", &nnn);
4339 if (p_env->packing) {
4340 max = 64;
4341 }
4342 else {
4343 max = 512;
4344 }
4345 if ((nnn > max ) || (nnn < 2))
4346 return -EINVAL;
4347 p_env->read_buffers = nnn;
4348 CLAW_DBF_TEXT(2,setup,"Rbufset");
4349 CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
4350 return count;
4351}
4352
4353static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
4354
4355static struct attribute *claw_attr[] = {
4356 &dev_attr_read_buffer.attr,
4357 &dev_attr_write_buffer.attr,
4358 &dev_attr_adapter_name.attr,
4359 &dev_attr_api_type.attr,
4360 &dev_attr_host_name.attr,
4361 NULL,
4362};
4363
4364static struct attribute_group claw_attr_group = {
4365 .attrs = claw_attr,
4366};
4367
4368static int
4369claw_add_files(struct device *dev)
4370{
4371 pr_debug("%s() called\n", __FUNCTION__);
4372 CLAW_DBF_TEXT(2,setup,"add_file");
4373 return sysfs_create_group(&dev->kobj, &claw_attr_group);
4374}
4375
4376static void
4377claw_remove_files(struct device *dev)
4378{
4379 pr_debug("%s() called\n", __FUNCTION__);
4380 CLAW_DBF_TEXT(2,setup,"rem_file");
4381 sysfs_remove_group(&dev->kobj, &claw_attr_group);
4382}
4383
4384/*--------------------------------------------------------------------*
4385* claw_init and cleanup *
4386*---------------------------------------------------------------------*/
4387
4388static void __exit
4389claw_cleanup(void)
4390{
4391 unregister_cu3088_discipline(&claw_group_driver);
4392 claw_unregister_debug_facility();
4393 printk(KERN_INFO "claw: Driver unloaded\n");
4394
4395}
4396
4397/**
4398 * Initialize module.
4399 * This is called just after the module is loaded.
4400 *
4401 * @return 0 on success, !0 on error.
4402 */
4403static int __init
4404claw_init(void)
4405{
4406 int ret = 0;
4407 printk(KERN_INFO "claw: starting driver "
4408#ifdef MODULE
4409 "module "
4410#else
4411 "compiled into kernel "
4412#endif
4413 " $Revision: 1.35 $ $Date: 2005/03/24 12:25:38 $ \n");
4414
4415
4416#ifdef FUNCTRACE
4417 printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
4418#endif
4419 ret = claw_register_debug_facility();
4420 if (ret) {
4421 printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
4422 __FUNCTION__,ret);
4423 return ret;
4424 }
4425 CLAW_DBF_TEXT(2,setup,"init_mod");
4426 ret = register_cu3088_discipline(&claw_group_driver);
4427 if (ret) {
4428 claw_unregister_debug_facility();
4429 printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
4430 __FUNCTION__,ret);
4431 }
4432#ifdef FUNCTRACE
4433 printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
4434#endif
4435 return ret;
4436}
4437
4438module_init(claw_init);
4439module_exit(claw_cleanup);
4440
4441
4442
4443/*--------------------------------------------------------------------*
4444* End of File *
4445*---------------------------------------------------------------------*/
4446
4447