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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / s390 / net / claw.c
bloba70712f21c9203a6bd2ea699414fbb9574a97981
1 /*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
5 * Linux for zSeries version
6 * Copyright (C) 2002,2005 IBM Corporation
7 * Author(s) Original code written by:
8 * Kazuo Iimura (iimura@jp.ibm.com)
9 * Rewritten by
10 * Andy Richter (richtera@us.ibm.com)
11 * Marc Price (mwprice@us.ibm.com)
12 *
13 * sysfs parms:
14 * group x.x.rrrr,x.x.wwww
15 * read_buffer nnnnnnn
16 * write_buffer nnnnnn
17 * host_name aaaaaaaa
18 * adapter_name aaaaaaaa
19 * api_type aaaaaaaa
20 *
21 * eg.
22 * group 0.0.0200 0.0.0201
23 * read_buffer 25
24 * write_buffer 20
25 * host_name LINUX390
26 * adapter_name RS6K
27 * api_type TCPIP
28 *
29 * where
30 *
31 * The device id is decided by the order entries
32 * are added to the group the first is claw0 the second claw1
33 * up to CLAW_MAX_DEV
34 *
35 * rrrr - the first of 2 consecutive device addresses used for the
36 * CLAW protocol.
37 * The specified address is always used as the input (Read)
38 * channel and the next address is used as the output channel.
39 *
40 * wwww - the second of 2 consecutive device addresses used for
41 * the CLAW protocol.
42 * The specified address is always used as the output
43 * channel and the previous address is used as the input channel.
44 *
45 * read_buffer - specifies number of input buffers to allocate.
46 * write_buffer - specifies number of output buffers to allocate.
47 * host_name - host name
48 * adaptor_name - adaptor name
49 * api_type - API type TCPIP or API will be sent and expected
50 * as ws_name
51 *
52 * Note the following requirements:
53 * 1) host_name must match the configured adapter_name on the remote side
54 * 2) adaptor_name must match the configured host name on the remote side
55 *
56 * Change History
57 * 1.00 Initial release shipped
58 * 1.10 Changes for Buffer allocation
59 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
60 * 1.25 Added Packing support
61 */
62 #include <asm/ccwdev.h>
63 #include <asm/ccwgroup.h>
64 #include <asm/debug.h>
65 #include <asm/idals.h>
66 #include <asm/io.h>
67
68 #include <linux/bitops.h>
69 #include <linux/ctype.h>
70 #include <linux/delay.h>
71 #include <linux/errno.h>
72 #include <linux/if_arp.h>
73 #include <linux/init.h>
74 #include <linux/interrupt.h>
75 #include <linux/ip.h>
76 #include <linux/kernel.h>
77 #include <linux/module.h>
78 #include <linux/netdevice.h>
79 #include <linux/etherdevice.h>
80 #include <linux/proc_fs.h>
81 #include <linux/sched.h>
82 #include <linux/signal.h>
83 #include <linux/skbuff.h>
84 #include <linux/slab.h>
85 #include <linux/string.h>
86 #include <linux/tcp.h>
87 #include <linux/timer.h>
88 #include <linux/types.h>
89
90 #include "cu3088.h"
91 #include "claw.h"
92
93 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
94 MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
95 "Copyright 2000,2005 IBM Corporation\n");
96 MODULE_LICENSE("GPL");
97
98 /* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE options:
99 DEBUGMSG - Enables output of various debug messages in the code
100 IOTRACE - Enables output of CCW and other IO related traces
101 FUNCTRACE - Enables output of function entry/exit trace
102 Define any combination of above options to enable tracing
103
104 CLAW also uses the s390dbf file system see claw_trace and claw_setup
105 */
106
107 /* following enables tracing */
108 //#define DEBUGMSG
109 //#define IOTRACE
110 //#define FUNCTRACE
111
112 #ifdef DEBUGMSG
113 #define DEBUG
114 #endif
115
116 #ifdef IOTRACE
117 #define DEBUG
118 #endif
119
120 #ifdef FUNCTRACE
121 #define DEBUG
122 #endif
123
124 static char debug_buffer[255];
125 /**
126 * Debug Facility Stuff
127 */
128 static debug_info_t *claw_dbf_setup;
129 static debug_info_t *claw_dbf_trace;
130
131 /**
132 * CLAW Debug Facility functions
133 */
134 static void
135 claw_unregister_debug_facility(void)
136 {
137 if (claw_dbf_setup)
138 debug_unregister(claw_dbf_setup);
139 if (claw_dbf_trace)
140 debug_unregister(claw_dbf_trace);
141 }
142
143 static int
144 claw_register_debug_facility(void)
145 {
146 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
147 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
148 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
149 printk(KERN_WARNING "Not enough memory for debug facility.\n");
150 claw_unregister_debug_facility();
151 return -ENOMEM;
152 }
153 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
154 debug_set_level(claw_dbf_setup, 2);
155 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
156 debug_set_level(claw_dbf_trace, 2);
157 return 0;
158 }
159
160 static inline void
161 claw_set_busy(struct net_device *dev)
162 {
163 ((struct claw_privbk *) dev->priv)->tbusy=1;
164 eieio();
165 }
166
167 static inline void
168 claw_clear_busy(struct net_device *dev)
169 {
170 clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
171 netif_wake_queue(dev);
172 eieio();
173 }
174
175 static inline int
176 claw_check_busy(struct net_device *dev)
177 {
178 eieio();
179 return ((struct claw_privbk *) dev->priv)->tbusy;
180 }
181
182 static inline void
183 claw_setbit_busy(int nr,struct net_device *dev)
184 {
185 netif_stop_queue(dev);
186 set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
187 }
188
189 static inline void
190 claw_clearbit_busy(int nr,struct net_device *dev)
191 {
192 clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
193 netif_wake_queue(dev);
194 }
195
196 static inline int
197 claw_test_and_setbit_busy(int nr,struct net_device *dev)
198 {
199 netif_stop_queue(dev);
200 return test_and_set_bit(nr,
201 (void *)&(((struct claw_privbk *) dev->priv)->tbusy));
202 }
203
204
205 /* Functions for the DEV methods */
206
207 static int claw_probe(struct ccwgroup_device *cgdev);
208 static void claw_remove_device(struct ccwgroup_device *cgdev);
209 static void claw_purge_skb_queue(struct sk_buff_head *q);
210 static int claw_new_device(struct ccwgroup_device *cgdev);
211 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
212 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
213 static int claw_change_mtu( struct net_device *dev, int new_mtu);
214 static int claw_open(struct net_device *dev);
215 static void claw_irq_handler(struct ccw_device *cdev,
216 unsigned long intparm, struct irb *irb);
217 static void claw_irq_tasklet ( unsigned long data );
218 static int claw_release(struct net_device *dev);
219 static void claw_write_retry ( struct chbk * p_ch );
220 static void claw_write_next ( struct chbk * p_ch );
221 static void claw_timer ( struct chbk * p_ch );
222
223 /* Functions */
224 static int add_claw_reads(struct net_device *dev,
225 struct ccwbk* p_first, struct ccwbk* p_last);
226 static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
227 static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
228 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
229 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
230 static int init_ccw_bk(struct net_device *dev);
231 static void probe_error( struct ccwgroup_device *cgdev);
232 static struct net_device_stats *claw_stats(struct net_device *dev);
233 static int pages_to_order_of_mag(int num_of_pages);
234 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
235 #ifdef DEBUG
236 static void dumpit (char *buf, int len);
237 #endif
238 /* sysfs Functions */
239 static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
240 static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
241 const char *buf, size_t count);
242 static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
243 static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
244 const char *buf, size_t count);
245 static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
246 static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
247 const char *buf, size_t count);
248 static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
249 static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
250 const char *buf, size_t count);
251 static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
252 static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
253 const char *buf, size_t count);
254 static int claw_add_files(struct device *dev);
255 static void claw_remove_files(struct device *dev);
256
257 /* Functions for System Validate */
258 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
259 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
260 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
261 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
262 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
263 static int claw_snd_sys_validate_rsp(struct net_device *dev,
264 struct clawctl * p_ctl, __u32 return_code);
265 static int claw_strt_conn_req(struct net_device *dev );
266 static void claw_strt_read ( struct net_device *dev, int lock );
267 static void claw_strt_out_IO( struct net_device *dev );
268 static void claw_free_wrt_buf( struct net_device *dev );
269
270 /* Functions for unpack reads */
271 static void unpack_read (struct net_device *dev );
272
273 /* ccwgroup table */
274
275 static struct ccwgroup_driver claw_group_driver = {
276 .owner = THIS_MODULE,
277 .name = "claw",
278 .max_slaves = 2,
279 .driver_id = 0xC3D3C1E6,
280 .probe = claw_probe,
281 .remove = claw_remove_device,
282 .set_online = claw_new_device,
283 .set_offline = claw_shutdown_device,
284 };
285
286 /*
287 *
288 * Key functions
289 */
290
291 /*----------------------------------------------------------------*
292 * claw_probe *
293 * this function is called for each CLAW device. *
294 *----------------------------------------------------------------*/
295 static int
296 claw_probe(struct ccwgroup_device *cgdev)
297 {
298 int rc;
299 struct claw_privbk *privptr=NULL;
300
301 #ifdef FUNCTRACE
302 printk(KERN_INFO "%s Enter\n",__FUNCTION__);
303 #endif
304 CLAW_DBF_TEXT(2,setup,"probe");
305 if (!get_device(&cgdev->dev))
306 return -ENODEV;
307 #ifdef DEBUGMSG
308 printk(KERN_INFO "claw: variable cgdev =\n");
309 dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
310 #endif
311 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
312 if (privptr == NULL) {
313 probe_error(cgdev);
314 put_device(&cgdev->dev);
315 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
316 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
317 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
318 return -ENOMEM;
319 }
320 privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
321 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
322 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
323 probe_error(cgdev);
324 put_device(&cgdev->dev);
325 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
326 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
327 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
328 return -ENOMEM;
329 }
330 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
331 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
332 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
333 privptr->p_env->packing = 0;
334 privptr->p_env->write_buffers = 5;
335 privptr->p_env->read_buffers = 5;
336 privptr->p_env->read_size = CLAW_FRAME_SIZE;
337 privptr->p_env->write_size = CLAW_FRAME_SIZE;
338 rc = claw_add_files(&cgdev->dev);
339 if (rc) {
340 probe_error(cgdev);
341 put_device(&cgdev->dev);
342 printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
343 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
344 CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
345 return rc;
346 }
347 printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
348 privptr->p_env->p_priv = privptr;
349 cgdev->cdev[0]->handler = claw_irq_handler;
350 cgdev->cdev[1]->handler = claw_irq_handler;
351 cgdev->dev.driver_data = privptr;
352 #ifdef FUNCTRACE
353 printk(KERN_INFO "claw:%s exit on line %d, "
354 "rc = 0\n",__FUNCTION__,__LINE__);
355 #endif
356 CLAW_DBF_TEXT(2,setup,"prbext 0");
357
358 return 0;
359 } /* end of claw_probe */
360
361 /*-------------------------------------------------------------------*
362 * claw_tx *
363 *-------------------------------------------------------------------*/
364
365 static int
366 claw_tx(struct sk_buff *skb, struct net_device *dev)
367 {
368 int rc;
369 struct claw_privbk *privptr=dev->priv;
370 unsigned long saveflags;
371 struct chbk *p_ch;
372
373 #ifdef FUNCTRACE
374 printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
375 #endif
376 CLAW_DBF_TEXT(4,trace,"claw_tx");
377 p_ch=&privptr->channel[WRITE];
378 if (skb == NULL) {
379 printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
380 dev->name);
381 privptr->stats.tx_dropped++;
382 #ifdef FUNCTRACE
383 printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
384 dev->name,__FUNCTION__, __LINE__);
385 #endif
386 CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
387 return -EIO;
388 }
389
390 #ifdef IOTRACE
391 printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
392 dumpit((char *) skb, sizeof(struct sk_buff));
393 printk(KERN_INFO "%s: variable dev=\n",dev->name);
394 dumpit((char *) dev, sizeof(struct net_device));
395 #endif
396 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
397 rc=claw_hw_tx( skb, dev, 1 );
398 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
399 #ifdef FUNCTRACE
400 printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
401 dev->name, __FUNCTION__, __LINE__, rc);
402 #endif
403 CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
404 return rc;
405 } /* end of claw_tx */
406
407 /*------------------------------------------------------------------*
408 * pack the collect queue into an skb and return it *
409 * If not packing just return the top skb from the queue *
410 *------------------------------------------------------------------*/
411
412 static struct sk_buff *
413 claw_pack_skb(struct claw_privbk *privptr)
414 {
415 struct sk_buff *new_skb,*held_skb;
416 struct chbk *p_ch = &privptr->channel[WRITE];
417 struct claw_env *p_env = privptr->p_env;
418 int pkt_cnt,pk_ind,so_far;
419
420 new_skb = NULL; /* assume no dice */
421 pkt_cnt = 0;
422 CLAW_DBF_TEXT(4,trace,"PackSKBe");
423 if (!skb_queue_empty(&p_ch->collect_queue)) {
424 /* some data */
425 held_skb = skb_dequeue(&p_ch->collect_queue);
426 if (held_skb)
427 dev_kfree_skb_any(held_skb);
428 else
429 return NULL;
430 if (p_env->packing != DO_PACKED)
431 return held_skb;
432 /* get a new SKB we will pack at least one */
433 new_skb = dev_alloc_skb(p_env->write_size);
434 if (new_skb == NULL) {
435 atomic_inc(&held_skb->users);
436 skb_queue_head(&p_ch->collect_queue,held_skb);
437 return NULL;
438 }
439 /* we have packed packet and a place to put it */
440 pk_ind = 1;
441 so_far = 0;
442 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
443 while ((pk_ind) && (held_skb != NULL)) {
444 if (held_skb->len+so_far <= p_env->write_size-8) {
445 memcpy(skb_put(new_skb,held_skb->len),
446 held_skb->data,held_skb->len);
447 privptr->stats.tx_packets++;
448 so_far += held_skb->len;
449 pkt_cnt++;
450 dev_kfree_skb_any(held_skb);
451 held_skb = skb_dequeue(&p_ch->collect_queue);
452 if (held_skb)
453 atomic_dec(&held_skb->users);
454 } else {
455 pk_ind = 0;
456 atomic_inc(&held_skb->users);
457 skb_queue_head(&p_ch->collect_queue,held_skb);
458 }
459 }
460 #ifdef IOTRACE
461 printk(KERN_INFO "%s: %s() Packed %d len %d\n",
462 p_env->ndev->name,
463 __FUNCTION__,pkt_cnt,new_skb->len);
464 #endif
465 }
466 CLAW_DBF_TEXT(4,trace,"PackSKBx");
467 return new_skb;
468 }
469
470 /*-------------------------------------------------------------------*
471 * claw_change_mtu *
472 * *
473 *-------------------------------------------------------------------*/
474
475 static int
476 claw_change_mtu(struct net_device *dev, int new_mtu)
477 {
478 struct claw_privbk *privptr=dev->priv;
479 int buff_size;
480 #ifdef FUNCTRACE
481 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
482 #endif
483 #ifdef DEBUGMSG
484 printk(KERN_INFO "variable dev =\n");
485 dumpit((char *) dev, sizeof(struct net_device));
486 printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
487 #endif
488 CLAW_DBF_TEXT(4,trace,"setmtu");
489 buff_size = privptr->p_env->write_size;
490 if ((new_mtu < 60) || (new_mtu > buff_size)) {
491 #ifdef FUNCTRACE
492 printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
493 dev->name,
494 __FUNCTION__, __LINE__);
495 #endif
496 return -EINVAL;
497 }
498 dev->mtu = new_mtu;
499 #ifdef FUNCTRACE
500 printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
501 __FUNCTION__, __LINE__);
502 #endif
503 return 0;
504 } /* end of claw_change_mtu */
505
506
507 /*-------------------------------------------------------------------*
508 * claw_open *
509 * *
510 *-------------------------------------------------------------------*/
511 static int
512 claw_open(struct net_device *dev)
513 {
514
515 int rc;
516 int i;
517 unsigned long saveflags=0;
518 unsigned long parm;
519 struct claw_privbk *privptr;
520 DECLARE_WAITQUEUE(wait, current);
521 struct timer_list timer;
522 struct ccwbk *p_buf;
523
524 #ifdef FUNCTRACE
525 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
526 #endif
527 CLAW_DBF_TEXT(4,trace,"open");
528 if (!dev || (dev->name[0] == 0x00)) {
529 CLAW_DBF_TEXT(2,trace,"BadDev");
530 printk(KERN_WARNING "claw: Bad device at open failing \n");
531 return -ENODEV;
532 }
533 privptr = (struct claw_privbk *)dev->priv;
534 /* allocate and initialize CCW blocks */
535 if (privptr->buffs_alloc == 0) {
536 rc=init_ccw_bk(dev);
537 if (rc) {
538 printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
539 dev->name,
540 __FUNCTION__, __LINE__);
541 CLAW_DBF_TEXT(2,trace,"openmem");
542 return -ENOMEM;
543 }
544 }
545 privptr->system_validate_comp=0;
546 privptr->release_pend=0;
547 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
548 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
549 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
550 privptr->p_env->packing=PACKING_ASK;
551 } else {
552 privptr->p_env->packing=0;
553 privptr->p_env->read_size=CLAW_FRAME_SIZE;
554 privptr->p_env->write_size=CLAW_FRAME_SIZE;
555 }
556 claw_set_busy(dev);
557 tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
558 (unsigned long) &privptr->channel[READ]);
559 for ( i = 0; i < 2; i++) {
560 CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
561 init_waitqueue_head(&privptr->channel[i].wait);
562 /* skb_queue_head_init(&p_ch->io_queue); */
563 if (i == WRITE)
564 skb_queue_head_init(
565 &privptr->channel[WRITE].collect_queue);
566 privptr->channel[i].flag_a = 0;
567 privptr->channel[i].IO_active = 0;
568 privptr->channel[i].flag &= ~CLAW_TIMER;
569 init_timer(&timer);
570 timer.function = (void *)claw_timer;
571 timer.data = (unsigned long)(&privptr->channel[i]);
572 timer.expires = jiffies + 15*HZ;
573 add_timer(&timer);
574 spin_lock_irqsave(get_ccwdev_lock(
575 privptr->channel[i].cdev), saveflags);
576 parm = (unsigned long) &privptr->channel[i];
577 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
578 rc = 0;
579 add_wait_queue(&privptr->channel[i].wait, &wait);
580 rc = ccw_device_halt(
581 (struct ccw_device *)privptr->channel[i].cdev,parm);
582 set_current_state(TASK_INTERRUPTIBLE);
583 spin_unlock_irqrestore(
584 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
585 schedule();
586 set_current_state(TASK_RUNNING);
587 remove_wait_queue(&privptr->channel[i].wait, &wait);
588 if(rc != 0)
589 ccw_check_return_code(privptr->channel[i].cdev, rc);
590 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
591 del_timer(&timer);
592 }
593 if ((((privptr->channel[READ].last_dstat |
594 privptr->channel[WRITE].last_dstat) &
595 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
596 (((privptr->channel[READ].flag |
597 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
598 #ifdef DEBUGMSG
599 printk(KERN_INFO "%s: channel problems during open - read:"
600 " %02x - write: %02x\n",
601 dev->name,
602 privptr->channel[READ].last_dstat,
603 privptr->channel[WRITE].last_dstat);
604 #endif
605 printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
606 CLAW_DBF_TEXT(2,trace,"notrdy");
607
608 for ( i = 0; i < 2; i++) {
609 spin_lock_irqsave(
610 get_ccwdev_lock(privptr->channel[i].cdev),
611 saveflags);
612 parm = (unsigned long) &privptr->channel[i];
613 privptr->channel[i].claw_state = CLAW_STOP;
614 rc = ccw_device_halt(
615 (struct ccw_device *)&privptr->channel[i].cdev,
616 parm);
617 spin_unlock_irqrestore(
618 get_ccwdev_lock(privptr->channel[i].cdev),
619 saveflags);
620 if (rc != 0) {
621 ccw_check_return_code(
622 privptr->channel[i].cdev, rc);
623 }
624 }
625 free_pages((unsigned long)privptr->p_buff_ccw,
626 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
627 if (privptr->p_env->read_size < PAGE_SIZE) {
628 free_pages((unsigned long)privptr->p_buff_read,
629 (int)pages_to_order_of_mag(
630 privptr->p_buff_read_num));
631 }
632 else {
633 p_buf=privptr->p_read_active_first;
634 while (p_buf!=NULL) {
635 free_pages((unsigned long)p_buf->p_buffer,
636 (int)pages_to_order_of_mag(
637 privptr->p_buff_pages_perread ));
638 p_buf=p_buf->next;
639 }
640 }
641 if (privptr->p_env->write_size < PAGE_SIZE ) {
642 free_pages((unsigned long)privptr->p_buff_write,
643 (int)pages_to_order_of_mag(
644 privptr->p_buff_write_num));
645 }
646 else {
647 p_buf=privptr->p_write_active_first;
648 while (p_buf!=NULL) {
649 free_pages((unsigned long)p_buf->p_buffer,
650 (int)pages_to_order_of_mag(
651 privptr->p_buff_pages_perwrite ));
652 p_buf=p_buf->next;
653 }
654 }
655 privptr->buffs_alloc = 0;
656 privptr->channel[READ].flag= 0x00;
657 privptr->channel[WRITE].flag = 0x00;
658 privptr->p_buff_ccw=NULL;
659 privptr->p_buff_read=NULL;
660 privptr->p_buff_write=NULL;
661 claw_clear_busy(dev);
662 #ifdef FUNCTRACE
663 printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
664 dev->name,__FUNCTION__,__LINE__);
665 #endif
666 CLAW_DBF_TEXT(2,trace,"open EIO");
667 return -EIO;
668 }
669
670 /* Send SystemValidate command */
671
672 claw_clear_busy(dev);
673
674 #ifdef FUNCTRACE
675 printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
676 dev->name,__FUNCTION__,__LINE__);
677 #endif
678 CLAW_DBF_TEXT(4,trace,"openok");
679 return 0;
680 } /* end of claw_open */
681
682 /*-------------------------------------------------------------------*
683 * *
684 * claw_irq_handler *
685 * *
686 *--------------------------------------------------------------------*/
687 static void
688 claw_irq_handler(struct ccw_device *cdev,
689 unsigned long intparm, struct irb *irb)
690 {
691 struct chbk *p_ch = NULL;
692 struct claw_privbk *privptr = NULL;
693 struct net_device *dev = NULL;
694 struct claw_env *p_env;
695 struct chbk *p_ch_r=NULL;
696
697
698 #ifdef FUNCTRACE
699 printk(KERN_INFO "%s enter \n",__FUNCTION__);
700 #endif
701 CLAW_DBF_TEXT(4,trace,"clawirq");
702 /* Bypass all 'unsolicited interrupts' */
703 if (!cdev->dev.driver_data) {
704 printk(KERN_WARNING "claw: unsolicited interrupt for device:"
705 "%s received c-%02x d-%02x\n",
706 cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
707 #ifdef FUNCTRACE
708 printk(KERN_INFO "claw: %s() "
709 "exit on line %d\n",__FUNCTION__,__LINE__);
710 #endif
711 CLAW_DBF_TEXT(2,trace,"badirq");
712 return;
713 }
714 privptr = (struct claw_privbk *)cdev->dev.driver_data;
715
716 /* Try to extract channel from driver data. */
717 if (privptr->channel[READ].cdev == cdev)
718 p_ch = &privptr->channel[READ];
719 else if (privptr->channel[WRITE].cdev == cdev)
720 p_ch = &privptr->channel[WRITE];
721 else {
722 printk(KERN_WARNING "claw: Can't determine channel for "
723 "interrupt, device %s\n", cdev->dev.bus_id);
724 CLAW_DBF_TEXT(2,trace,"badchan");
725 return;
726 }
727 CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
728
729 dev = (struct net_device *) (p_ch->ndev);
730 p_env=privptr->p_env;
731
732 #ifdef IOTRACE
733 printk(KERN_INFO "%s: interrupt for device: %04x "
734 "received c-%02x d-%02x state-%02x\n",
735 dev->name, p_ch->devno, irb->scsw.cstat,
736 irb->scsw.dstat, p_ch->claw_state);
737 #endif
738
739 /* Copy interruption response block. */
740 memcpy(p_ch->irb, irb, sizeof(struct irb));
741
742 /* Check for good subchannel return code, otherwise error message */
743 if (irb->scsw.cstat && !(irb->scsw.cstat & SCHN_STAT_PCI)) {
744 printk(KERN_INFO "%s: subchannel check for device: %04x -"
745 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
746 dev->name, p_ch->devno,
747 irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
748 #ifdef IOTRACE
749 dumpit((char *)irb,sizeof(struct irb));
750 dumpit((char *)(unsigned long)irb->scsw.cpa,
751 sizeof(struct ccw1));
752 #endif
753 #ifdef FUNCTRACE
754 printk(KERN_INFO "%s:%s Exit on line %d\n",
755 dev->name,__FUNCTION__,__LINE__);
756 #endif
757 CLAW_DBF_TEXT(2,trace,"chanchk");
758 /* return; */
759 }
760
761 /* Check the reason-code of a unit check */
762 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
763 ccw_check_unit_check(p_ch, irb->ecw[0]);
764 }
765
766 /* State machine to bring the connection up, down and to restart */
767 p_ch->last_dstat = irb->scsw.dstat;
768
769 switch (p_ch->claw_state) {
770 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
771 #ifdef DEBUGMSG
772 printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
773 #endif
774 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
775 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
776 (p_ch->irb->scsw.stctl ==
777 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
778 #ifdef FUNCTRACE
779 printk(KERN_INFO "%s:%s Exit on line %d\n",
780 dev->name,__FUNCTION__,__LINE__);
781 #endif
782 return;
783 }
784 wake_up(&p_ch->wait); /* wake up claw_release */
785
786 #ifdef DEBUGMSG
787 printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
788 #endif
789 #ifdef FUNCTRACE
790 printk(KERN_INFO "%s:%s Exit on line %d\n",
791 dev->name,__FUNCTION__,__LINE__);
792 #endif
793 CLAW_DBF_TEXT(4,trace,"stop");
794 return;
795
796 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
797 #ifdef DEBUGMSG
798 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
799 dev->name);
800 #endif
801 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
802 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
803 (p_ch->irb->scsw.stctl ==
804 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
805 #ifdef FUNCTRACE
806 printk(KERN_INFO "%s:%s Exit on line %d\n",
807 dev->name,__FUNCTION__,__LINE__);
808 #endif
809 CLAW_DBF_TEXT(4,trace,"haltio");
810 return;
811 }
812 if (p_ch->flag == CLAW_READ) {
813 p_ch->claw_state = CLAW_START_READ;
814 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
815 }
816 else
817 if (p_ch->flag == CLAW_WRITE) {
818 p_ch->claw_state = CLAW_START_WRITE;
819 /* send SYSTEM_VALIDATE */
820 claw_strt_read(dev, LOCK_NO);
821 claw_send_control(dev,
822 SYSTEM_VALIDATE_REQUEST,
823 0, 0, 0,
824 p_env->host_name,
825 p_env->adapter_name );
826 } else {
827 printk(KERN_WARNING "claw: unsolicited "
828 "interrupt for device:"
829 "%s received c-%02x d-%02x\n",
830 cdev->dev.bus_id,
831 irb->scsw.cstat,
832 irb->scsw.dstat);
833 return;
834 }
835 #ifdef DEBUGMSG
836 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
837 dev->name);
838 #endif
839 #ifdef FUNCTRACE
840 printk(KERN_INFO "%s:%s Exit on line %d\n",
841 dev->name,__FUNCTION__,__LINE__);
842 #endif
843 CLAW_DBF_TEXT(4,trace,"haltio");
844 return;
845 case CLAW_START_READ:
846 CLAW_DBF_TEXT(4,trace,"ReadIRQ");
847 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
848 clear_bit(0, (void *)&p_ch->IO_active);
849 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
850 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
851 (p_ch->irb->ecw[0]) == 0)
852 {
853 privptr->stats.rx_errors++;
854 printk(KERN_INFO "%s: Restart is "
855 "required after remote "
856 "side recovers \n",
857 dev->name);
858 }
859 #ifdef FUNCTRACE
860 printk(KERN_INFO "%s:%s Exit on line %d\n",
861 dev->name,__FUNCTION__,__LINE__);
862 #endif
863 CLAW_DBF_TEXT(4,trace,"notrdy");
864 return;
865 }
866 if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
867 (p_ch->irb->scsw.dstat==0)) {
868 if (test_and_set_bit(CLAW_BH_ACTIVE,
869 (void *)&p_ch->flag_a) == 0) {
870 tasklet_schedule(&p_ch->tasklet);
871 }
872 else {
873 CLAW_DBF_TEXT(4,trace,"PCINoBH");
874 }
875 #ifdef FUNCTRACE
876 printk(KERN_INFO "%s:%s Exit on line %d\n",
877 dev->name,__FUNCTION__,__LINE__);
878 #endif
879 CLAW_DBF_TEXT(4,trace,"PCI_read");
880 return;
881 }
882 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
883 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
884 (p_ch->irb->scsw.stctl ==
885 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
886 #ifdef FUNCTRACE
887 printk(KERN_INFO "%s:%s Exit on line %d\n",
888 dev->name,__FUNCTION__,__LINE__);
889 #endif
890 CLAW_DBF_TEXT(4,trace,"SPend_rd");
891 return;
892 }
893 clear_bit(0, (void *)&p_ch->IO_active);
894 claw_clearbit_busy(TB_RETRY,dev);
895 if (test_and_set_bit(CLAW_BH_ACTIVE,
896 (void *)&p_ch->flag_a) == 0) {
897 tasklet_schedule(&p_ch->tasklet);
898 }
899 else {
900 CLAW_DBF_TEXT(4,trace,"RdBHAct");
901 }
902
903 #ifdef DEBUGMSG
904 printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
905 dev->name);
906 #endif
907 #ifdef FUNCTRACE
908 printk(KERN_INFO "%s:%s Exit on line %d\n",
909 dev->name,__FUNCTION__,__LINE__);
910 #endif
911 CLAW_DBF_TEXT(4,trace,"RdIRQXit");
912 return;
913 case CLAW_START_WRITE:
914 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
915 printk(KERN_INFO "%s: Unit Check Occured in "
916 "write channel\n",dev->name);
917 clear_bit(0, (void *)&p_ch->IO_active);
918 if (p_ch->irb->ecw[0] & 0x80 ) {
919 printk(KERN_INFO "%s: Resetting Event "
920 "occurred:\n",dev->name);
921 init_timer(&p_ch->timer);
922 p_ch->timer.function =
923 (void *)claw_write_retry;
924 p_ch->timer.data = (unsigned long)p_ch;
925 p_ch->timer.expires = jiffies + 10*HZ;
926 add_timer(&p_ch->timer);
927 printk(KERN_INFO "%s: write connection "
928 "restarting\n",dev->name);
929 }
930 #ifdef FUNCTRACE
931 printk(KERN_INFO "%s:%s Exit on line %d\n",
932 dev->name,__FUNCTION__,__LINE__);
933 #endif
934 CLAW_DBF_TEXT(4,trace,"rstrtwrt");
935 return;
936 }
937 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
938 clear_bit(0, (void *)&p_ch->IO_active);
939 printk(KERN_INFO "%s: Unit Exception "
940 "Occured in write channel\n",
941 dev->name);
942 }
943 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
944 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
945 (p_ch->irb->scsw.stctl ==
946 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
947 #ifdef FUNCTRACE
948 printk(KERN_INFO "%s:%s Exit on line %d\n",
949 dev->name,__FUNCTION__,__LINE__);
950 #endif
951 CLAW_DBF_TEXT(4,trace,"writeUE");
952 return;
953 }
954 clear_bit(0, (void *)&p_ch->IO_active);
955 if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
956 claw_write_next(p_ch);
957 claw_clearbit_busy(TB_TX,dev);
958 claw_clear_busy(dev);
959 }
960 p_ch_r=(struct chbk *)&privptr->channel[READ];
961 if (test_and_set_bit(CLAW_BH_ACTIVE,
962 (void *)&p_ch_r->flag_a) == 0) {
963 tasklet_schedule(&p_ch_r->tasklet);
964 }
965
966 #ifdef DEBUGMSG
967 printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
968 dev->name);
969 #endif
970 #ifdef FUNCTRACE
971 printk(KERN_INFO "%s:%s Exit on line %d\n",
972 dev->name,__FUNCTION__,__LINE__);
973 #endif
974 CLAW_DBF_TEXT(4,trace,"StWtExit");
975 return;
976 default:
977 printk(KERN_WARNING "%s: wrong selection code - irq "
978 "state=%d\n",dev->name,p_ch->claw_state);
979 #ifdef FUNCTRACE
980 printk(KERN_INFO "%s:%s Exit on line %d\n",
981 dev->name,__FUNCTION__,__LINE__);
982 #endif
983 CLAW_DBF_TEXT(2,trace,"badIRQ");
984 return;
985 }
986
987 } /* end of claw_irq_handler */
988
989
990 /*-------------------------------------------------------------------*
991 * claw_irq_tasklet *
992 * *
993 *--------------------------------------------------------------------*/
994 static void
995 claw_irq_tasklet ( unsigned long data )
996 {
997 struct chbk * p_ch;
998 struct net_device *dev;
999 struct claw_privbk * privptr;
1000
1001 p_ch = (struct chbk *) data;
1002 dev = (struct net_device *)p_ch->ndev;
1003 #ifdef FUNCTRACE
1004 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1005 #endif
1006 #ifdef DEBUGMSG
1007 printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
1008 dumpit((char *) p_ch, sizeof(struct chbk));
1009 #endif
1010 CLAW_DBF_TEXT(4,trace,"IRQtask");
1011
1012 privptr = (struct claw_privbk *) dev->priv;
1013
1014 #ifdef DEBUGMSG
1015 printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
1016 dev->name, p_ch->claw_state);
1017 #endif
1018
1019 unpack_read(dev);
1020 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
1021 CLAW_DBF_TEXT(4,trace,"TskletXt");
1022 #ifdef FUNCTRACE
1023 printk(KERN_INFO "%s:%s Exit on line %d\n",
1024 dev->name,__FUNCTION__,__LINE__);
1025 #endif
1026 return;
1027 } /* end of claw_irq_bh */
1028
1029 /*-------------------------------------------------------------------*
1030 * claw_release *
1031 * *
1032 *--------------------------------------------------------------------*/
1033 static int
1034 claw_release(struct net_device *dev)
1035 {
1036 int rc;
1037 int i;
1038 unsigned long saveflags;
1039 unsigned long parm;
1040 struct claw_privbk *privptr;
1041 DECLARE_WAITQUEUE(wait, current);
1042 struct ccwbk* p_this_ccw;
1043 struct ccwbk* p_buf;
1044
1045 if (!dev)
1046 return 0;
1047 privptr = (struct claw_privbk *) dev->priv;
1048 if (!privptr)
1049 return 0;
1050 #ifdef FUNCTRACE
1051 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1052 #endif
1053 CLAW_DBF_TEXT(4,trace,"release");
1054 #ifdef DEBUGMSG
1055 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1056 dumpit((char *) dev, sizeof(struct net_device));
1057 printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
1058 printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
1059 #endif
1060 privptr->release_pend=1;
1061 claw_setbit_busy(TB_STOP,dev);
1062 for ( i = 1; i >=0 ; i--) {
1063 spin_lock_irqsave(
1064 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1065 /* del_timer(&privptr->channel[READ].timer); */
1066 privptr->channel[i].claw_state = CLAW_STOP;
1067 privptr->channel[i].IO_active = 0;
1068 parm = (unsigned long) &privptr->channel[i];
1069 if (i == WRITE)
1070 claw_purge_skb_queue(
1071 &privptr->channel[WRITE].collect_queue);
1072 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
1073 if (privptr->system_validate_comp==0x00) /* never opened? */
1074 init_waitqueue_head(&privptr->channel[i].wait);
1075 add_wait_queue(&privptr->channel[i].wait, &wait);
1076 set_current_state(TASK_INTERRUPTIBLE);
1077 spin_unlock_irqrestore(
1078 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1079 schedule();
1080 set_current_state(TASK_RUNNING);
1081 remove_wait_queue(&privptr->channel[i].wait, &wait);
1082 if (rc != 0) {
1083 ccw_check_return_code(privptr->channel[i].cdev, rc);
1084 }
1085 }
1086 if (privptr->pk_skb != NULL) {
1087 dev_kfree_skb_any(privptr->pk_skb);
1088 privptr->pk_skb = NULL;
1089 }
1090 if(privptr->buffs_alloc != 1) {
1091 #ifdef FUNCTRACE
1092 printk(KERN_INFO "%s:%s Exit on line %d\n",
1093 dev->name,__FUNCTION__,__LINE__);
1094 #endif
1095 CLAW_DBF_TEXT(4,trace,"none2fre");
1096 return 0;
1097 }
1098 CLAW_DBF_TEXT(4,trace,"freebufs");
1099 if (privptr->p_buff_ccw != NULL) {
1100 free_pages((unsigned long)privptr->p_buff_ccw,
1101 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
1102 }
1103 CLAW_DBF_TEXT(4,trace,"freeread");
1104 if (privptr->p_env->read_size < PAGE_SIZE) {
1105 if (privptr->p_buff_read != NULL) {
1106 free_pages((unsigned long)privptr->p_buff_read,
1107 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
1108 }
1109 }
1110 else {
1111 p_buf=privptr->p_read_active_first;
1112 while (p_buf!=NULL) {
1113 free_pages((unsigned long)p_buf->p_buffer,
1114 (int)pages_to_order_of_mag(
1115 privptr->p_buff_pages_perread ));
1116 p_buf=p_buf->next;
1117 }
1118 }
1119 CLAW_DBF_TEXT(4,trace,"freewrit");
1120 if (privptr->p_env->write_size < PAGE_SIZE ) {
1121 free_pages((unsigned long)privptr->p_buff_write,
1122 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
1123 }
1124 else {
1125 p_buf=privptr->p_write_active_first;
1126 while (p_buf!=NULL) {
1127 free_pages((unsigned long)p_buf->p_buffer,
1128 (int)pages_to_order_of_mag(
1129 privptr->p_buff_pages_perwrite ));
1130 p_buf=p_buf->next;
1131 }
1132 }
1133 CLAW_DBF_TEXT(4,trace,"clearptr");
1134 privptr->buffs_alloc = 0;
1135 privptr->p_buff_ccw=NULL;
1136 privptr->p_buff_read=NULL;
1137 privptr->p_buff_write=NULL;
1138 privptr->system_validate_comp=0;
1139 privptr->release_pend=0;
1140 /* Remove any writes that were pending and reset all reads */
1141 p_this_ccw=privptr->p_read_active_first;
1142 while (p_this_ccw!=NULL) {
1143 p_this_ccw->header.length=0xffff;
1144 p_this_ccw->header.opcode=0xff;
1145 p_this_ccw->header.flag=0x00;
1146 p_this_ccw=p_this_ccw->next;
1147 }
1148
1149 while (privptr->p_write_active_first!=NULL) {
1150 p_this_ccw=privptr->p_write_active_first;
1151 p_this_ccw->header.flag=CLAW_PENDING;
1152 privptr->p_write_active_first=p_this_ccw->next;
1153 p_this_ccw->next=privptr->p_write_free_chain;
1154 privptr->p_write_free_chain=p_this_ccw;
1155 ++privptr->write_free_count;
1156 }
1157 privptr->p_write_active_last=NULL;
1158 privptr->mtc_logical_link = -1;
1159 privptr->mtc_skipping = 1;
1160 privptr->mtc_offset=0;
1161
1162 if (((privptr->channel[READ].last_dstat |
1163 privptr->channel[WRITE].last_dstat) &
1164 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
1165 printk(KERN_WARNING "%s: channel problems during close - "
1166 "read: %02x - write: %02x\n",
1167 dev->name,
1168 privptr->channel[READ].last_dstat,
1169 privptr->channel[WRITE].last_dstat);
1170 CLAW_DBF_TEXT(2,trace,"badclose");
1171 }
1172 #ifdef FUNCTRACE
1173 printk(KERN_INFO "%s:%s Exit on line %d\n",
1174 dev->name,__FUNCTION__,__LINE__);
1175 #endif
1176 CLAW_DBF_TEXT(4,trace,"rlsexit");
1177 return 0;
1178 } /* end of claw_release */
1179
1180
1181
1182 /*-------------------------------------------------------------------*
1183 * claw_write_retry *
1184 * *
1185 *--------------------------------------------------------------------*/
1186
1187 static void
1188 claw_write_retry ( struct chbk *p_ch )
1189 {
1190
1191 struct net_device *dev=p_ch->ndev;
1192
1193
1194 #ifdef FUNCTRACE
1195 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
1196 printk(KERN_INFO "claw: variable p_ch =\n");
1197 dumpit((char *) p_ch, sizeof(struct chbk));
1198 #endif
1199 CLAW_DBF_TEXT(4,trace,"w_retry");
1200 if (p_ch->claw_state == CLAW_STOP) {
1201 #ifdef FUNCTRACE
1202 printk(KERN_INFO "%s:%s Exit on line %d\n",
1203 dev->name,__FUNCTION__,__LINE__);
1204 #endif
1205 return;
1206 }
1207 #ifdef DEBUGMSG
1208 printk( KERN_INFO "%s:%s state-%02x\n" ,
1209 dev->name,
1210 __FUNCTION__,
1211 p_ch->claw_state);
1212 #endif
1213 claw_strt_out_IO( dev );
1214 #ifdef FUNCTRACE
1215 printk(KERN_INFO "%s:%s Exit on line %d\n",
1216 dev->name,__FUNCTION__,__LINE__);
1217 #endif
1218 CLAW_DBF_TEXT(4,trace,"rtry_xit");
1219 return;
1220 } /* end of claw_write_retry */
1221
1222
1223 /*-------------------------------------------------------------------*
1224 * claw_write_next *
1225 * *
1226 *--------------------------------------------------------------------*/
1227
1228 static void
1229 claw_write_next ( struct chbk * p_ch )
1230 {
1231
1232 struct net_device *dev;
1233 struct claw_privbk *privptr=NULL;
1234 struct sk_buff *pk_skb;
1235 int rc;
1236
1237 #ifdef FUNCTRACE
1238 printk(KERN_INFO "%s:%s Enter \n",p_ch->ndev->name,__FUNCTION__);
1239 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1240 dumpit((char *) p_ch, sizeof(struct chbk));
1241 #endif
1242 CLAW_DBF_TEXT(4,trace,"claw_wrt");
1243 if (p_ch->claw_state == CLAW_STOP)
1244 return;
1245 dev = (struct net_device *) p_ch->ndev;
1246 privptr = (struct claw_privbk *) dev->priv;
1247 claw_free_wrt_buf( dev );
1248 if ((privptr->write_free_count > 0) &&
1249 !skb_queue_empty(&p_ch->collect_queue)) {
1250 pk_skb = claw_pack_skb(privptr);
1251 while (pk_skb != NULL) {
1252 rc = claw_hw_tx( pk_skb, dev,1);
1253 if (privptr->write_free_count > 0) {
1254 pk_skb = claw_pack_skb(privptr);
1255 } else
1256 pk_skb = NULL;
1257 }
1258 }
1259 if (privptr->p_write_active_first!=NULL) {
1260 claw_strt_out_IO(dev);
1261 }
1262
1263 #ifdef FUNCTRACE
1264 printk(KERN_INFO "%s:%s Exit on line %d\n",
1265 dev->name,__FUNCTION__,__LINE__);
1266 #endif
1267 return;
1268 } /* end of claw_write_next */
1269
1270 /*-------------------------------------------------------------------*
1271 * *
1272 * claw_timer *
1273 *--------------------------------------------------------------------*/
1274
1275 static void
1276 claw_timer ( struct chbk * p_ch )
1277 {
1278 #ifdef FUNCTRACE
1279 printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
1280 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1281 dumpit((char *) p_ch, sizeof(struct chbk));
1282 #endif
1283 CLAW_DBF_TEXT(4,trace,"timer");
1284 p_ch->flag |= CLAW_TIMER;
1285 wake_up(&p_ch->wait);
1286 #ifdef FUNCTRACE
1287 printk(KERN_INFO "%s:%s Exit on line %d\n",
1288 p_ch->ndev->name,__FUNCTION__,__LINE__);
1289 #endif
1290 return;
1291 } /* end of claw_timer */
1292
1293
1294 /*
1295 *
1296 * functions
1297 */
1298
1299
1300 /*-------------------------------------------------------------------*
1301 * *
1302 * pages_to_order_of_mag *
1303 * *
1304 * takes a number of pages from 1 to 512 and returns the *
1305 * log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1306 * of magnitude get_free_pages() has an upper order of 9 *
1307 *--------------------------------------------------------------------*/
1308
1309 static int
1310 pages_to_order_of_mag(int num_of_pages)
1311 {
1312 int order_of_mag=1; /* assume 2 pages */
1313 int nump=2;
1314 #ifdef FUNCTRACE
1315 printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
1316 #endif
1317 CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
1318 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1319 /* 512 pages = 2Meg on 4k page systems */
1320 if (num_of_pages >= 512) {return 9; }
1321 /* we have two or more pages order is at least 1 */
1322 for (nump=2 ;nump <= 512;nump*=2) {
1323 if (num_of_pages <= nump)
1324 break;
1325 order_of_mag +=1;
1326 }
1327 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1328 #ifdef FUNCTRACE
1329 printk(KERN_INFO "%s Exit on line %d, order = %d\n",
1330 __FUNCTION__,__LINE__, order_of_mag);
1331 #endif
1332 CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
1333 return order_of_mag;
1334 }
1335
1336 /*-------------------------------------------------------------------*
1337 * *
1338 * add_claw_reads *
1339 * *
1340 *--------------------------------------------------------------------*/
1341 static int
1342 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1343 struct ccwbk* p_last)
1344 {
1345 struct claw_privbk *privptr;
1346 struct ccw1 temp_ccw;
1347 struct endccw * p_end;
1348 #ifdef IOTRACE
1349 struct ccwbk* p_buf;
1350 #endif
1351 #ifdef FUNCTRACE
1352 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1353 #endif
1354 #ifdef DEBUGMSG
1355 printk(KERN_INFO "dev\n");
1356 dumpit((char *) dev, sizeof(struct net_device));
1357 printk(KERN_INFO "p_first\n");
1358 dumpit((char *) p_first, sizeof(struct ccwbk));
1359 printk(KERN_INFO "p_last\n");
1360 dumpit((char *) p_last, sizeof(struct ccwbk));
1361 #endif
1362 CLAW_DBF_TEXT(4,trace,"addreads");
1363 privptr = dev->priv;
1364 p_end = privptr->p_end_ccw;
1365
1366 /* first CCW and last CCW contains a new set of read channel programs
1367 * to apend the running channel programs
1368 */
1369 if ( p_first==NULL) {
1370 #ifdef FUNCTRACE
1371 printk(KERN_INFO "%s:%s Exit on line %d\n",
1372 dev->name,__FUNCTION__,__LINE__);
1373 #endif
1374 CLAW_DBF_TEXT(4,trace,"addexit");
1375 return 0;
1376 }
1377
1378 /* set up ending CCW sequence for this segment */
1379 if (p_end->read1) {
1380 p_end->read1=0x00; /* second ending CCW is now active */
1381 /* reset ending CCWs and setup TIC CCWs */
1382 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1383 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1384 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1385 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1386 p_end->read2_nop2.cda=0;
1387 p_end->read2_nop2.count=1;
1388 }
1389 else {
1390 p_end->read1=0x01; /* first ending CCW is now active */
1391 /* reset ending CCWs and setup TIC CCWs */
1392 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1393 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1394 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1395 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1396 p_end->read1_nop2.cda=0;
1397 p_end->read1_nop2.count=1;
1398 }
1399
1400 if ( privptr-> p_read_active_first ==NULL ) {
1401 #ifdef DEBUGMSG
1402 printk(KERN_INFO "%s:%s p_read_active_first == NULL \n",
1403 dev->name,__FUNCTION__);
1404 printk(KERN_INFO "%s:%s Read active first/last changed \n",
1405 dev->name,__FUNCTION__);
1406 #endif
1407 privptr-> p_read_active_first= p_first; /* set new first */
1408 privptr-> p_read_active_last = p_last; /* set new last */
1409 }
1410 else {
1411
1412 #ifdef DEBUGMSG
1413 printk(KERN_INFO "%s:%s Read in progress \n",
1414 dev->name,__FUNCTION__);
1415 #endif
1416 /* set up TIC ccw */
1417 temp_ccw.cda= (__u32)__pa(&p_first->read);
1418 temp_ccw.count=0;
1419 temp_ccw.flags=0;
1420 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1421
1422
1423 if (p_end->read1) {
1424
1425 /* first set of CCW's is chained to the new read */
1426 /* chain, so the second set is chained to the active chain. */
1427 /* Therefore modify the second set to point to the new */
1428 /* read chain set up TIC CCWs */
1429 /* make sure we update the CCW so channel doesn't fetch it */
1430 /* when it's only half done */
1431 memcpy( &p_end->read2_nop2, &temp_ccw ,
1432 sizeof(struct ccw1));
1433 privptr->p_read_active_last->r_TIC_1.cda=
1434 (__u32)__pa(&p_first->read);
1435 privptr->p_read_active_last->r_TIC_2.cda=
1436 (__u32)__pa(&p_first->read);
1437 }
1438 else {
1439 /* make sure we update the CCW so channel doesn't */
1440 /* fetch it when it is only half done */
1441 memcpy( &p_end->read1_nop2, &temp_ccw ,
1442 sizeof(struct ccw1));
1443 privptr->p_read_active_last->r_TIC_1.cda=
1444 (__u32)__pa(&p_first->read);
1445 privptr->p_read_active_last->r_TIC_2.cda=
1446 (__u32)__pa(&p_first->read);
1447 }
1448 /* chain in new set of blocks */
1449 privptr->p_read_active_last->next = p_first;
1450 privptr->p_read_active_last=p_last;
1451 } /* end of if ( privptr-> p_read_active_first ==NULL) */
1452 #ifdef IOTRACE
1453 printk(KERN_INFO "%s:%s dump p_last CCW BK \n",dev->name,__FUNCTION__);
1454 dumpit((char *)p_last, sizeof(struct ccwbk));
1455 printk(KERN_INFO "%s:%s dump p_end CCW BK \n",dev->name,__FUNCTION__);
1456 dumpit((char *)p_end, sizeof(struct endccw));
1457
1458 printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
1459 dumpit((char *)p_first, sizeof(struct ccwbk));
1460 printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
1461 dev->name,__FUNCTION__);
1462 p_buf=privptr->p_read_active_first;
1463 while (p_buf!=NULL) {
1464 dumpit((char *)p_buf, sizeof(struct ccwbk));
1465 p_buf=p_buf->next;
1466 }
1467 #endif
1468 #ifdef FUNCTRACE
1469 printk(KERN_INFO "%s:%s Exit on line %d\n",
1470 dev->name,__FUNCTION__,__LINE__);
1471 #endif
1472 CLAW_DBF_TEXT(4,trace,"addexit");
1473 return 0;
1474 } /* end of add_claw_reads */
1475
1476 /*-------------------------------------------------------------------*
1477 * ccw_check_return_code *
1478 * *
1479 *-------------------------------------------------------------------*/
1480
1481 static void
1482 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1483 {
1484 #ifdef FUNCTRACE
1485 printk(KERN_INFO "%s: %s() > enter \n",
1486 cdev->dev.bus_id,__FUNCTION__);
1487 #endif
1488 CLAW_DBF_TEXT(4,trace,"ccwret");
1489 #ifdef DEBUGMSG
1490 printk(KERN_INFO "variable cdev =\n");
1491 dumpit((char *) cdev, sizeof(struct ccw_device));
1492 printk(KERN_INFO "variable return_code = %d\n",return_code);
1493 #endif
1494 if (return_code != 0) {
1495 switch (return_code) {
1496 case -EBUSY:
1497 printk(KERN_INFO "%s: Busy !\n",
1498 cdev->dev.bus_id);
1499 break;
1500 case -ENODEV:
1501 printk(KERN_EMERG "%s: Missing device called "
1502 "for IO ENODEV\n", cdev->dev.bus_id);
1503 break;
1504 case -EIO:
1505 printk(KERN_EMERG "%s: Status pending... EIO \n",
1506 cdev->dev.bus_id);
1507 break;
1508 case -EINVAL:
1509 printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
1510 cdev->dev.bus_id);
1511 break;
1512 default:
1513 printk(KERN_EMERG "%s: Unknown error in "
1514 "Do_IO %d\n",cdev->dev.bus_id, return_code);
1515 }
1516 }
1517 #ifdef FUNCTRACE
1518 printk(KERN_INFO "%s: %s() > exit on line %d\n",
1519 cdev->dev.bus_id,__FUNCTION__,__LINE__);
1520 #endif
1521 CLAW_DBF_TEXT(4,trace,"ccwret");
1522 } /* end of ccw_check_return_code */
1523
1524 /*-------------------------------------------------------------------*
1525 * ccw_check_unit_check *
1526 *--------------------------------------------------------------------*/
1527
1528 static void
1529 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1530 {
1531 struct net_device *dev = p_ch->ndev;
1532
1533 #ifdef FUNCTRACE
1534 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1535 #endif
1536 #ifdef DEBUGMSG
1537 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1538 dumpit((char *)dev, sizeof(struct net_device));
1539 printk(KERN_INFO "%s: variable sense =\n",dev->name);
1540 dumpit((char *)&sense, 2);
1541 #endif
1542 CLAW_DBF_TEXT(4,trace,"unitchek");
1543
1544 printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
1545 dev->name, sense);
1546
1547 if (sense & 0x40) {
1548 if (sense & 0x01) {
1549 printk(KERN_WARNING "%s: Interface disconnect or "
1550 "Selective reset "
1551 "occurred (remote side)\n", dev->name);
1552 }
1553 else {
1554 printk(KERN_WARNING "%s: System reset occured"
1555 " (remote side)\n", dev->name);
1556 }
1557 }
1558 else if (sense & 0x20) {
1559 if (sense & 0x04) {
1560 printk(KERN_WARNING "%s: Data-streaming "
1561 "timeout)\n", dev->name);
1562 }
1563 else {
1564 printk(KERN_WARNING "%s: Data-transfer parity"
1565 " error\n", dev->name);
1566 }
1567 }
1568 else if (sense & 0x10) {
1569 if (sense & 0x20) {
1570 printk(KERN_WARNING "%s: Hardware malfunction "
1571 "(remote side)\n", dev->name);
1572 }
1573 else {
1574 printk(KERN_WARNING "%s: read-data parity error "
1575 "(remote side)\n", dev->name);
1576 }
1577 }
1578
1579 #ifdef FUNCTRACE
1580 printk(KERN_INFO "%s: %s() exit on line %d\n",
1581 dev->name,__FUNCTION__,__LINE__);
1582 #endif
1583 } /* end of ccw_check_unit_check */
1584
1585
1586
1587 /*-------------------------------------------------------------------*
1588 * Dump buffer format *
1589 * *
1590 *--------------------------------------------------------------------*/
1591 #ifdef DEBUG
1592 static void
1593 dumpit(char* buf, int len)
1594 {
1595
1596 __u32 ct, sw, rm, dup;
1597 char *ptr, *rptr;
1598 char tbuf[82], tdup[82];
1599 #if (CONFIG_64BIT)
1600 char addr[22];
1601 #else
1602 char addr[12];
1603 #endif
1604 char boff[12];
1605 char bhex[82], duphex[82];
1606 char basc[40];
1607
1608 sw = 0;
1609 rptr =ptr=buf;
1610 rm = 16;
1611 duphex[0] = 0x00;
1612 dup = 0;
1613 for ( ct=0; ct < len; ct++, ptr++, rptr++ ) {
1614 if (sw == 0) {
1615 #if (CONFIG_64BIT)
1616 sprintf(addr, "%16.16lX",(unsigned long)rptr);
1617 #else
1618 sprintf(addr, "%8.8X",(__u32)rptr);
1619 #endif
1620 sprintf(boff, "%4.4X", (__u32)ct);
1621 bhex[0] = '\0';
1622 basc[0] = '\0';
1623 }
1624 if ((sw == 4) || (sw == 12)) {
1625 strcat(bhex, " ");
1626 }
1627 if (sw == 8) {
1628 strcat(bhex, " ");
1629 }
1630 #if (CONFIG_64BIT)
1631 sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
1632 #else
1633 sprintf(tbuf,"%2.2X", (__u32)*ptr);
1634 #endif
1635 tbuf[2] = '\0';
1636 strcat(bhex, tbuf);
1637 if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
1638 basc[sw] = *ptr;
1639 }
1640 else {
1641 basc[sw] = '.';
1642 }
1643 basc[sw+1] = '\0';
1644 sw++;
1645 rm--;
1646 if (sw==16) {
1647 if ((strcmp(duphex, bhex)) !=0) {
1648 if (dup !=0) {
1649 sprintf(tdup,"Duplicate as above to"
1650 " %s", addr);
1651 printk( KERN_INFO " "
1652 " --- %s ---\n",tdup);
1653 }
1654 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1655 addr, boff, bhex, basc);
1656 dup = 0;
1657 strcpy(duphex, bhex);
1658 }
1659 else {
1660 dup++;
1661 }
1662 sw = 0;
1663 rm = 16;
1664 }
1665 } /* endfor */
1666
1667 if (sw != 0) {
1668 for ( ; rm > 0; rm--, sw++ ) {
1669 if ((sw==4) || (sw==12)) strcat(bhex, " ");
1670 if (sw==8) strcat(bhex, " ");
1671 strcat(bhex, " ");
1672 strcat(basc, " ");
1673 }
1674 if (dup !=0) {
1675 sprintf(tdup,"Duplicate as above to %s", addr);
1676 printk( KERN_INFO " --- %s ---\n",
1677 tdup);
1678 }
1679 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1680 addr, boff, bhex, basc);
1681 }
1682 else {
1683 if (dup >=1) {
1684 sprintf(tdup,"Duplicate as above to %s", addr);
1685 printk( KERN_INFO " --- %s ---\n",
1686 tdup);
1687 }
1688 if (dup !=0) {
1689 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1690 addr, boff, bhex, basc);
1691 }
1692 }
1693 return;
1694
1695 } /* end of dumpit */
1696 #endif
1697
1698 /*-------------------------------------------------------------------*
1699 * find_link *
1700 *--------------------------------------------------------------------*/
1701 static int
1702 find_link(struct net_device *dev, char *host_name, char *ws_name )
1703 {
1704 struct claw_privbk *privptr;
1705 struct claw_env *p_env;
1706 int rc=0;
1707
1708 #ifdef FUNCTRACE
1709 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
1710 #endif
1711 CLAW_DBF_TEXT(2,setup,"findlink");
1712 #ifdef DEBUGMSG
1713 printk(KERN_INFO "%s: variable dev = \n",dev->name);
1714 dumpit((char *) dev, sizeof(struct net_device));
1715 printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
1716 printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
1717 #endif
1718 privptr=dev->priv;
1719 p_env=privptr->p_env;
1720 switch (p_env->packing)
1721 {
1722 case PACKING_ASK:
1723 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1724 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1725 rc = EINVAL;
1726 break;
1727 case DO_PACKED:
1728 case PACK_SEND:
1729 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1730 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1731 rc = EINVAL;
1732 break;
1733 default:
1734 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1735 (memcmp(p_env->api_type , ws_name, 8)!=0))
1736 rc = EINVAL;
1737 break;
1738 }
1739
1740 #ifdef FUNCTRACE
1741 printk(KERN_INFO "%s:%s Exit on line %d\n",
1742 dev->name,__FUNCTION__,__LINE__);
1743 #endif
1744 return 0;
1745 } /* end of find_link */
1746
1747 /*-------------------------------------------------------------------*
1748 * claw_hw_tx *
1749 * *
1750 * *
1751 *-------------------------------------------------------------------*/
1752
1753 static int
1754 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1755 {
1756 int rc=0;
1757 struct claw_privbk *privptr;
1758 struct ccwbk *p_this_ccw;
1759 struct ccwbk *p_first_ccw;
1760 struct ccwbk *p_last_ccw;
1761 __u32 numBuffers;
1762 signed long len_of_data;
1763 unsigned long bytesInThisBuffer;
1764 unsigned char *pDataAddress;
1765 struct endccw *pEnd;
1766 struct ccw1 tempCCW;
1767 struct chbk *p_ch;
1768 struct claw_env *p_env;
1769 int lock;
1770 struct clawph *pk_head;
1771 struct chbk *ch;
1772 #ifdef IOTRACE
1773 struct ccwbk *p_buf;
1774 #endif
1775 #ifdef FUNCTRACE
1776 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1777 #endif
1778 CLAW_DBF_TEXT(4,trace,"hw_tx");
1779 #ifdef DEBUGMSG
1780 printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
1781 dumpit((char *) skb, sizeof(struct sk_buff));
1782 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1783 dumpit((char *) dev, sizeof(struct net_device));
1784 printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
1785 #endif
1786 privptr = (struct claw_privbk *) (dev->priv);
1787 p_ch=(struct chbk *)&privptr->channel[WRITE];
1788 p_env =privptr->p_env;
1789 #ifdef IOTRACE
1790 printk(KERN_INFO "%s: %s() dump sk_buff \n",dev->name,__FUNCTION__);
1791 dumpit((char *)skb ,sizeof(struct sk_buff));
1792 #endif
1793 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1794 /* scan the write queue to free any completed write packets */
1795 p_first_ccw=NULL;
1796 p_last_ccw=NULL;
1797 if ((p_env->packing >= PACK_SEND) &&
1798 (skb->cb[1] != 'P')) {
1799 skb_push(skb,sizeof(struct clawph));
1800 pk_head=(struct clawph *)skb->data;
1801 pk_head->len=skb->len-sizeof(struct clawph);
1802 if (pk_head->len%4) {
1803 pk_head->len+= 4-(pk_head->len%4);
1804 skb_pad(skb,4-(pk_head->len%4));
1805 skb_put(skb,4-(pk_head->len%4));
1806 }
1807 if (p_env->packing == DO_PACKED)
1808 pk_head->link_num = linkid;
1809 else
1810 pk_head->link_num = 0;
1811 pk_head->flag = 0x00;
1812 skb_pad(skb,4);
1813 skb->cb[1] = 'P';
1814 }
1815 if (linkid == 0) {
1816 if (claw_check_busy(dev)) {
1817 if (privptr->write_free_count!=0) {
1818 claw_clear_busy(dev);
1819 }
1820 else {
1821 claw_strt_out_IO(dev );
1822 claw_free_wrt_buf( dev );
1823 if (privptr->write_free_count==0) {
1824 #ifdef IOTRACE
1825 printk(KERN_INFO "%s: "
1826 "(claw_check_busy) no free write "
1827 "buffers\n", dev->name);
1828 #endif
1829 ch = &privptr->channel[WRITE];
1830 atomic_inc(&skb->users);
1831 skb_queue_tail(&ch->collect_queue, skb);
1832 goto Done;
1833 }
1834 else {
1835 claw_clear_busy(dev);
1836 }
1837 }
1838 }
1839 /* tx lock */
1840 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1841 #ifdef DEBUGMSG
1842 printk(KERN_INFO "%s: busy (claw_test_and_setbit_"
1843 "busy)\n", dev->name);
1844 #endif
1845 ch = &privptr->channel[WRITE];
1846 atomic_inc(&skb->users);
1847 skb_queue_tail(&ch->collect_queue, skb);
1848 claw_strt_out_IO(dev );
1849 rc=-EBUSY;
1850 goto Done2;
1851 }
1852 }
1853 /* See how many write buffers are required to hold this data */
1854 <<<<<<< HEAD:drivers/s390/net/claw.c
1855 numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
1856 ( privptr->p_env->write_size);
1857 =======
1858 numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1859 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/s390/net/claw.c
1860
1861 /* If that number of buffers isn't available, give up for now */
1862 if (privptr->write_free_count < numBuffers ||
1863 privptr->p_write_free_chain == NULL ) {
1864
1865 claw_setbit_busy(TB_NOBUFFER,dev);
1866
1867 #ifdef DEBUGMSG
1868 printk(KERN_INFO "%s: busy (claw_setbit_busy"
1869 "(TB_NOBUFFER))\n", dev->name);
1870 printk(KERN_INFO " free_count: %d, numBuffers : %d\n",
1871 (int)privptr->write_free_count,(int) numBuffers );
1872 #endif
1873 ch = &privptr->channel[WRITE];
1874 atomic_inc(&skb->users);
1875 skb_queue_tail(&ch->collect_queue, skb);
1876 CLAW_DBF_TEXT(2,trace,"clawbusy");
1877 goto Done2;
1878 }
1879 pDataAddress=skb->data;
1880 len_of_data=skb->len;
1881
1882 while (len_of_data > 0) {
1883 #ifdef DEBUGMSG
1884 printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
1885 dev->name ,__FUNCTION__,len_of_data);
1886 dumpit((char *)pDataAddress ,64);
1887 #endif
1888 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1889 if (p_this_ccw == NULL) { /* lost the race */
1890 ch = &privptr->channel[WRITE];
1891 atomic_inc(&skb->users);
1892 skb_queue_tail(&ch->collect_queue, skb);
1893 goto Done2;
1894 }
1895 privptr->p_write_free_chain=p_this_ccw->next;
1896 p_this_ccw->next=NULL;
1897 --privptr->write_free_count; /* -1 */
1898 bytesInThisBuffer=len_of_data;
1899 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1900 len_of_data-=bytesInThisBuffer;
1901 pDataAddress+=(unsigned long)bytesInThisBuffer;
1902 /* setup write CCW */
1903 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1904 if (len_of_data>0) {
1905 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1906 }
1907 p_this_ccw->write.count=bytesInThisBuffer;
1908 /* now add to end of this chain */
1909 if (p_first_ccw==NULL) {
1910 p_first_ccw=p_this_ccw;
1911 }
1912 if (p_last_ccw!=NULL) {
1913 p_last_ccw->next=p_this_ccw;
1914 /* set up TIC ccws */
1915 p_last_ccw->w_TIC_1.cda=
1916 (__u32)__pa(&p_this_ccw->write);
1917 }
1918 p_last_ccw=p_this_ccw; /* save new last block */
1919 #ifdef IOTRACE
1920 printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
1921 dev->name,__FUNCTION__,bytesInThisBuffer);
1922 dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
1923 dumpit((char *)p_this_ccw->p_buffer, 64);
1924 #endif
1925 }
1926
1927 /* FirstCCW and LastCCW now contain a new set of write channel
1928 * programs to append to the running channel program
1929 */
1930
1931 if (p_first_ccw!=NULL) {
1932 /* setup ending ccw sequence for this segment */
1933 pEnd=privptr->p_end_ccw;
1934 if (pEnd->write1) {
1935 pEnd->write1=0x00; /* second end ccw is now active */
1936 /* set up Tic CCWs */
1937 p_last_ccw->w_TIC_1.cda=
1938 (__u32)__pa(&pEnd->write2_nop1);
1939 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1940 pEnd->write2_nop2.flags =
1941 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1942 pEnd->write2_nop2.cda=0;
1943 pEnd->write2_nop2.count=1;
1944 }
1945 else { /* end of if (pEnd->write1)*/
1946 pEnd->write1=0x01; /* first end ccw is now active */
1947 /* set up Tic CCWs */
1948 p_last_ccw->w_TIC_1.cda=
1949 (__u32)__pa(&pEnd->write1_nop1);
1950 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1951 pEnd->write1_nop2.flags =
1952 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1953 pEnd->write1_nop2.cda=0;
1954 pEnd->write1_nop2.count=1;
1955 } /* end if if (pEnd->write1) */
1956
1957
1958 if (privptr->p_write_active_first==NULL ) {
1959 privptr->p_write_active_first=p_first_ccw;
1960 privptr->p_write_active_last=p_last_ccw;
1961 }
1962 else {
1963
1964 /* set up Tic CCWs */
1965
1966 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1967 tempCCW.count=0;
1968 tempCCW.flags=0;
1969 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1970
1971 if (pEnd->write1) {
1972
1973 /*
1974 * first set of ending CCW's is chained to the new write
1975 * chain, so the second set is chained to the active chain
1976 * Therefore modify the second set to point the new write chain.
1977 * make sure we update the CCW atomically
1978 * so channel does not fetch it when it's only half done
1979 */
1980 memcpy( &pEnd->write2_nop2, &tempCCW ,
1981 sizeof(struct ccw1));
1982 privptr->p_write_active_last->w_TIC_1.cda=
1983 (__u32)__pa(&p_first_ccw->write);
1984 }
1985 else {
1986
1987 /*make sure we update the CCW atomically
1988 *so channel does not fetch it when it's only half done
1989 */
1990 memcpy(&pEnd->write1_nop2, &tempCCW ,
1991 sizeof(struct ccw1));
1992 privptr->p_write_active_last->w_TIC_1.cda=
1993 (__u32)__pa(&p_first_ccw->write);
1994
1995 } /* end if if (pEnd->write1) */
1996
1997 privptr->p_write_active_last->next=p_first_ccw;
1998 privptr->p_write_active_last=p_last_ccw;
1999 }
2000
2001 } /* endif (p_first_ccw!=NULL) */
2002
2003
2004 #ifdef IOTRACE
2005 printk(KERN_INFO "%s: %s() > Dump Active CCW chain \n",
2006 dev->name,__FUNCTION__);
2007 p_buf=privptr->p_write_active_first;
2008 while (p_buf!=NULL) {
2009 dumpit((char *)p_buf, sizeof(struct ccwbk));
2010 p_buf=p_buf->next;
2011 }
2012 p_buf=(struct ccwbk*)privptr->p_end_ccw;
2013 dumpit((char *)p_buf, sizeof(struct endccw));
2014 #endif
2015 dev_kfree_skb_any(skb);
2016 if (linkid==0) {
2017 lock=LOCK_NO;
2018 }
2019 else {
2020 lock=LOCK_YES;
2021 }
2022 claw_strt_out_IO(dev );
2023 /* if write free count is zero , set NOBUFFER */
2024 #ifdef DEBUGMSG
2025 printk(KERN_INFO "%s: %s() > free_count is %d\n",
2026 dev->name,__FUNCTION__,
2027 (int) privptr->write_free_count );
2028 #endif
2029 if (privptr->write_free_count==0) {
2030 claw_setbit_busy(TB_NOBUFFER,dev);
2031 }
2032 Done2:
2033 claw_clearbit_busy(TB_TX,dev);
2034 Done:
2035 #ifdef FUNCTRACE
2036 printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
2037 dev->name,__FUNCTION__,__LINE__, rc);
2038 #endif
2039 return(rc);
2040 } /* end of claw_hw_tx */
2041
2042 /*-------------------------------------------------------------------*
2043 * *
2044 * init_ccw_bk *
2045 * *
2046 *--------------------------------------------------------------------*/
2047
2048 static int
2049 init_ccw_bk(struct net_device *dev)
2050 {
2051
2052 __u32 ccw_blocks_required;
2053 __u32 ccw_blocks_perpage;
2054 __u32 ccw_pages_required;
2055 __u32 claw_reads_perpage=1;
2056 __u32 claw_read_pages;
2057 __u32 claw_writes_perpage=1;
2058 __u32 claw_write_pages;
2059 void *p_buff=NULL;
2060 struct ccwbk*p_free_chain;
2061 struct ccwbk*p_buf;
2062 struct ccwbk*p_last_CCWB;
2063 struct ccwbk*p_first_CCWB;
2064 struct endccw *p_endccw=NULL;
2065 addr_t real_address;
2066 struct claw_privbk *privptr=dev->priv;
2067 struct clawh *pClawH=NULL;
2068 addr_t real_TIC_address;
2069 int i,j;
2070 #ifdef FUNCTRACE
2071 printk(KERN_INFO "%s: %s() enter \n",dev->name,__FUNCTION__);
2072 #endif
2073 CLAW_DBF_TEXT(4,trace,"init_ccw");
2074 #ifdef DEBUGMSG
2075 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2076 dumpit((char *) dev, sizeof(struct net_device));
2077 #endif
2078
2079 /* initialize statistics field */
2080 privptr->active_link_ID=0;
2081 /* initialize ccwbk pointers */
2082 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
2083 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
2084 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
2085 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
2086 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
2087 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
2088 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
2089 privptr->buffs_alloc = 0;
2090 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
2091 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
2092 /* initialize free write ccwbk counter */
2093 privptr->write_free_count=0; /* number of free bufs on write chain */
2094 p_last_CCWB = NULL;
2095 p_first_CCWB= NULL;
2096 /*
2097 * We need 1 CCW block for each read buffer, 1 for each
2098 * write buffer, plus 1 for ClawSignalBlock
2099 */
2100 ccw_blocks_required =
2101 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
2102 #ifdef DEBUGMSG
2103 printk(KERN_INFO "%s: %s() "
2104 "ccw_blocks_required=%d\n",
2105 dev->name,__FUNCTION__,
2106 ccw_blocks_required);
2107 printk(KERN_INFO "%s: %s() "
2108 "PAGE_SIZE=0x%x\n",
2109 dev->name,__FUNCTION__,
2110 (unsigned int)PAGE_SIZE);
2111 printk(KERN_INFO "%s: %s() > "
2112 "PAGE_MASK=0x%x\n",
2113 dev->name,__FUNCTION__,
2114 (unsigned int)PAGE_MASK);
2115 #endif
2116 /*
2117 * compute number of CCW blocks that will fit in a page
2118 */
2119 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
2120 ccw_pages_required=
2121 <<<<<<< HEAD:drivers/s390/net/claw.c
2122 (ccw_blocks_required+ccw_blocks_perpage -1) /
2123 ccw_blocks_perpage;
2124 =======
2125 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
2126 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/s390/net/claw.c
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 <<<<<<< HEAD:drivers/s390/net/claw.c
2143 if (privptr->p_env->read_size < PAGE_SIZE) {
2144 claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
2145 claw_read_pages= (privptr->p_env->read_buffers +
2146 claw_reads_perpage -1) / claw_reads_perpage;
2147 =======
2148 if (privptr->p_env->read_size < PAGE_SIZE) {
2149 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
2150 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
2151 claw_reads_perpage);
2152 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/s390/net/claw.c
2153 }
2154 else { /* > or equal */
2155 <<<<<<< HEAD:drivers/s390/net/claw.c
2156 privptr->p_buff_pages_perread=
2157 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2158 claw_read_pages=
2159 privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
2160 =======
2161 privptr->p_buff_pages_perread =
2162 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
2163 claw_read_pages = privptr->p_env->read_buffers *
2164 privptr->p_buff_pages_perread;
2165 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/s390/net/claw.c
2166 }
2167 if (privptr->p_env->write_size < PAGE_SIZE) {
2168 <<<<<<< HEAD:drivers/s390/net/claw.c
2169 claw_writes_perpage=
2170 PAGE_SIZE / privptr->p_env->write_size;
2171 claw_write_pages=
2172 (privptr->p_env->write_buffers + claw_writes_perpage -1) /
2173 claw_writes_perpage;
2174 =======
2175 claw_writes_perpage =
2176 PAGE_SIZE / privptr->p_env->write_size;
2177 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
2178 claw_writes_perpage);
2179 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/s390/net/claw.c
2180
2181 }
2182 else { /* > or equal */
2183 <<<<<<< HEAD:drivers/s390/net/claw.c
2184 privptr->p_buff_pages_perwrite=
2185 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2186 claw_write_pages=
2187 privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
2188 =======
2189 privptr->p_buff_pages_perwrite =
2190 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
2191 claw_write_pages = privptr->p_env->write_buffers *
2192 privptr->p_buff_pages_perwrite;
2193 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/s390/net/claw.c
2194 }
2195 #ifdef DEBUGMSG
2196 if (privptr->p_env->read_size < PAGE_SIZE) {
2197 printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
2198 dev->name,__FUNCTION__,
2199 claw_reads_perpage);
2200 }
2201 else {
2202 printk(KERN_INFO "%s: %s() pages_perread=%d\n",
2203 dev->name,__FUNCTION__,
2204 privptr->p_buff_pages_perread);
2205 }
2206 printk(KERN_INFO "%s: %s() read_pages=%d\n",
2207 dev->name,__FUNCTION__,
2208 claw_read_pages);
2209 if (privptr->p_env->write_size < PAGE_SIZE) {
2210 printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
2211 dev->name,__FUNCTION__,
2212 claw_writes_perpage);
2213 }
2214 else {
2215 printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
2216 dev->name,__FUNCTION__,
2217 privptr->p_buff_pages_perwrite);
2218 }
2219 printk(KERN_INFO "%s: %s() write_pages=%d\n",
2220 dev->name,__FUNCTION__,
2221 claw_write_pages);
2222 #endif
2223
2224
2225 /*
2226 * allocate ccw_pages_required
2227 */
2228 if (privptr->p_buff_ccw==NULL) {
2229 privptr->p_buff_ccw=
2230 (void *)__get_free_pages(__GFP_DMA,
2231 (int)pages_to_order_of_mag(ccw_pages_required ));
2232 if (privptr->p_buff_ccw==NULL) {
2233 printk(KERN_INFO "%s: %s() "
2234 "__get_free_pages for CCWs failed : "
2235 "pages is %d\n",
2236 dev->name,__FUNCTION__,
2237 ccw_pages_required );
2238 #ifdef FUNCTRACE
2239 printk(KERN_INFO "%s: %s() > "
2240 "exit on line %d, rc = ENOMEM\n",
2241 dev->name,__FUNCTION__,
2242 __LINE__);
2243 #endif
2244 return -ENOMEM;
2245 }
2246 privptr->p_buff_ccw_num=ccw_pages_required;
2247 }
2248 memset(privptr->p_buff_ccw, 0x00,
2249 privptr->p_buff_ccw_num * PAGE_SIZE);
2250
2251 /*
2252 * obtain ending ccw block address
2253 *
2254 */
2255 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
2256 real_address = (__u32)__pa(privptr->p_end_ccw);
2257 /* Initialize ending CCW block */
2258 #ifdef DEBUGMSG
2259 printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
2260 dev->name,__FUNCTION__);
2261 #endif
2262
2263 p_endccw=privptr->p_end_ccw;
2264 p_endccw->real=real_address;
2265 p_endccw->write1=0x00;
2266 p_endccw->read1=0x00;
2267
2268 /* write1_nop1 */
2269 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2270 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2271 p_endccw->write1_nop1.count = 1;
2272 p_endccw->write1_nop1.cda = 0;
2273
2274 /* write1_nop2 */
2275 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2276 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2277 p_endccw->write1_nop2.count = 1;
2278 p_endccw->write1_nop2.cda = 0;
2279
2280 /* write2_nop1 */
2281 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2282 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2283 p_endccw->write2_nop1.count = 1;
2284 p_endccw->write2_nop1.cda = 0;
2285
2286 /* write2_nop2 */
2287 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2288 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2289 p_endccw->write2_nop2.count = 1;
2290 p_endccw->write2_nop2.cda = 0;
2291
2292 /* read1_nop1 */
2293 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2294 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2295 p_endccw->read1_nop1.count = 1;
2296 p_endccw->read1_nop1.cda = 0;
2297
2298 /* read1_nop2 */
2299 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2300 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2301 p_endccw->read1_nop2.count = 1;
2302 p_endccw->read1_nop2.cda = 0;
2303
2304 /* read2_nop1 */
2305 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2306 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2307 p_endccw->read2_nop1.count = 1;
2308 p_endccw->read2_nop1.cda = 0;
2309
2310 /* read2_nop2 */
2311 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2312 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2313 p_endccw->read2_nop2.count = 1;
2314 p_endccw->read2_nop2.cda = 0;
2315
2316 #ifdef IOTRACE
2317 printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
2318 dev->name,__FUNCTION__);
2319 dumpit((char *)p_endccw, sizeof(struct endccw));
2320 #endif
2321
2322 /*
2323 * Build a chain of CCWs
2324 *
2325 */
2326
2327 #ifdef DEBUGMSG
2328 printk(KERN_INFO "%s: %s() Begin build a chain of CCW buffer \n",
2329 dev->name,__FUNCTION__);
2330 #endif
2331 p_buff=privptr->p_buff_ccw;
2332
2333 p_free_chain=NULL;
2334 for (i=0 ; i < ccw_pages_required; i++ ) {
2335 real_address = (__u32)__pa(p_buff);
2336 p_buf=p_buff;
2337 for (j=0 ; j < ccw_blocks_perpage ; j++) {
2338 p_buf->next = p_free_chain;
2339 p_free_chain = p_buf;
2340 p_buf->real=(__u32)__pa(p_buf);
2341 ++p_buf;
2342 }
2343 p_buff+=PAGE_SIZE;
2344 }
2345 #ifdef DEBUGMSG
2346 printk(KERN_INFO "%s: %s() "
2347 "End build a chain of CCW buffer \n",
2348 dev->name,__FUNCTION__);
2349 p_buf=p_free_chain;
2350 while (p_buf!=NULL) {
2351 dumpit((char *)p_buf, sizeof(struct ccwbk));
2352 p_buf=p_buf->next;
2353 }
2354 #endif
2355
2356 /*
2357 * Initialize ClawSignalBlock
2358 *
2359 */
2360 #ifdef DEBUGMSG
2361 printk(KERN_INFO "%s: %s() "
2362 "Begin initialize ClawSignalBlock \n",
2363 dev->name,__FUNCTION__);
2364 #endif
2365 if (privptr->p_claw_signal_blk==NULL) {
2366 privptr->p_claw_signal_blk=p_free_chain;
2367 p_free_chain=p_free_chain->next;
2368 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
2369 pClawH->length=0xffff;
2370 pClawH->opcode=0xff;
2371 pClawH->flag=CLAW_BUSY;
2372 }
2373 #ifdef DEBUGMSG
2374 printk(KERN_INFO "%s: %s() > End initialize "
2375 "ClawSignalBlock\n",
2376 dev->name,__FUNCTION__);
2377 dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
2378 #endif
2379
2380 /*
2381 * allocate write_pages_required and add to free chain
2382 */
2383 if (privptr->p_buff_write==NULL) {
2384 if (privptr->p_env->write_size < PAGE_SIZE) {
2385 privptr->p_buff_write=
2386 (void *)__get_free_pages(__GFP_DMA,
2387 (int)pages_to_order_of_mag(claw_write_pages ));
2388 if (privptr->p_buff_write==NULL) {
2389 printk(KERN_INFO "%s: %s() __get_free_pages for write"
2390 " bufs failed : get is for %d pages\n",
2391 dev->name,__FUNCTION__,claw_write_pages );
2392 free_pages((unsigned long)privptr->p_buff_ccw,
2393 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2394 privptr->p_buff_ccw=NULL;
2395 #ifdef FUNCTRACE
2396 printk(KERN_INFO "%s: %s() > exit on line %d,"
2397 "rc = ENOMEM\n",
2398 dev->name,__FUNCTION__,__LINE__);
2399 #endif
2400 return -ENOMEM;
2401 }
2402 /*
2403 * Build CLAW write free chain
2404 *
2405 */
2406
2407 memset(privptr->p_buff_write, 0x00,
2408 ccw_pages_required * PAGE_SIZE);
2409 #ifdef DEBUGMSG
2410 printk(KERN_INFO "%s: %s() Begin build claw write free "
2411 "chain \n",dev->name,__FUNCTION__);
2412 #endif
2413 privptr->p_write_free_chain=NULL;
2414
2415 p_buff=privptr->p_buff_write;
2416
2417 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
2418 p_buf = p_free_chain; /* get a CCW */
2419 p_free_chain = p_buf->next;
2420 p_buf->next =privptr->p_write_free_chain;
2421 privptr->p_write_free_chain = p_buf;
2422 p_buf-> p_buffer = (struct clawbuf *)p_buff;
2423 p_buf-> write.cda = (__u32)__pa(p_buff);
2424 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2425 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2426 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2427 p_buf-> w_read_FF.count = 1;
2428 p_buf-> w_read_FF.cda =
2429 (__u32)__pa(&p_buf-> header.flag);
2430 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2431 p_buf-> w_TIC_1.flags = 0;
2432 p_buf-> w_TIC_1.count = 0;
2433
2434 if (((unsigned long)p_buff+privptr->p_env->write_size) >=
2435 ((unsigned long)(p_buff+2*
2436 (privptr->p_env->write_size) -1) & PAGE_MASK)) {
2437 p_buff= p_buff+privptr->p_env->write_size;
2438 }
2439 }
2440 }
2441 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
2442 {
2443 privptr->p_write_free_chain=NULL;
2444 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
2445 p_buff=(void *)__get_free_pages(__GFP_DMA,
2446 (int)pages_to_order_of_mag(
2447 privptr->p_buff_pages_perwrite) );
2448 #ifdef IOTRACE
2449 printk(KERN_INFO "%s:%s __get_free_pages "
2450 "for writes buf: get for %d pages\n",
2451 dev->name,__FUNCTION__,
2452 privptr->p_buff_pages_perwrite);
2453 #endif
2454 if (p_buff==NULL) {
2455 printk(KERN_INFO "%s:%s __get_free_pages "
2456 "for writes buf failed : get is for %d pages\n",
2457 dev->name,
2458 __FUNCTION__,
2459 privptr->p_buff_pages_perwrite );
2460 free_pages((unsigned long)privptr->p_buff_ccw,
2461 (int)pages_to_order_of_mag(
2462 privptr->p_buff_ccw_num));
2463 privptr->p_buff_ccw=NULL;
2464 p_buf=privptr->p_buff_write;
2465 while (p_buf!=NULL) {
2466 free_pages((unsigned long)
2467 p_buf->p_buffer,
2468 (int)pages_to_order_of_mag(
2469 privptr->p_buff_pages_perwrite));
2470 p_buf=p_buf->next;
2471 }
2472 #ifdef FUNCTRACE
2473 printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
2474 dev->name,
2475 __FUNCTION__,
2476 __LINE__);
2477 #endif
2478 return -ENOMEM;
2479 } /* Error on get_pages */
2480 memset(p_buff, 0x00, privptr->p_env->write_size );
2481 p_buf = p_free_chain;
2482 p_free_chain = p_buf->next;
2483 p_buf->next = privptr->p_write_free_chain;
2484 privptr->p_write_free_chain = p_buf;
2485 privptr->p_buff_write = p_buf;
2486 p_buf->p_buffer=(struct clawbuf *)p_buff;
2487 p_buf-> write.cda = (__u32)__pa(p_buff);
2488 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2489 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2490 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2491 p_buf-> w_read_FF.count = 1;
2492 p_buf-> w_read_FF.cda =
2493 (__u32)__pa(&p_buf-> header.flag);
2494 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2495 p_buf-> w_TIC_1.flags = 0;
2496 p_buf-> w_TIC_1.count = 0;
2497 } /* for all write_buffers */
2498
2499 } /* else buffers are PAGE_SIZE or bigger */
2500
2501 }
2502 privptr->p_buff_write_num=claw_write_pages;
2503 privptr->write_free_count=privptr->p_env->write_buffers;
2504
2505
2506 #ifdef DEBUGMSG
2507 printk(KERN_INFO "%s:%s End build claw write free chain \n",
2508 dev->name,__FUNCTION__);
2509 p_buf=privptr->p_write_free_chain;
2510 while (p_buf!=NULL) {
2511 dumpit((char *)p_buf, sizeof(struct ccwbk));
2512 p_buf=p_buf->next;
2513 }
2514 #endif
2515 /*
2516 * allocate read_pages_required and chain to free chain
2517 */
2518 if (privptr->p_buff_read==NULL) {
2519 if (privptr->p_env->read_size < PAGE_SIZE) {
2520 privptr->p_buff_read=
2521 (void *)__get_free_pages(__GFP_DMA,
2522 (int)pages_to_order_of_mag(claw_read_pages) );
2523 if (privptr->p_buff_read==NULL) {
2524 printk(KERN_INFO "%s: %s() "
2525 "__get_free_pages for read buf failed : "
2526 "get is for %d pages\n",
2527 dev->name,__FUNCTION__,claw_read_pages );
2528 free_pages((unsigned long)privptr->p_buff_ccw,
2529 (int)pages_to_order_of_mag(
2530 privptr->p_buff_ccw_num));
2531 /* free the write pages size is < page size */
2532 free_pages((unsigned long)privptr->p_buff_write,
2533 (int)pages_to_order_of_mag(
2534 privptr->p_buff_write_num));
2535 privptr->p_buff_ccw=NULL;
2536 privptr->p_buff_write=NULL;
2537 #ifdef FUNCTRACE
2538 printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
2539 " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
2540 #endif
2541 return -ENOMEM;
2542 }
2543 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
2544 privptr->p_buff_read_num=claw_read_pages;
2545 /*
2546 * Build CLAW read free chain
2547 *
2548 */
2549 #ifdef DEBUGMSG
2550 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2551 dev->name,__FUNCTION__);
2552 #endif
2553 p_buff=privptr->p_buff_read;
2554 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2555 p_buf = p_free_chain;
2556 p_free_chain = p_buf->next;
2557
2558 if (p_last_CCWB==NULL) {
2559 p_buf->next=NULL;
2560 real_TIC_address=0;
2561 p_last_CCWB=p_buf;
2562 }
2563 else {
2564 p_buf->next=p_first_CCWB;
2565 real_TIC_address=
2566 (__u32)__pa(&p_first_CCWB -> read );
2567 }
2568
2569 p_first_CCWB=p_buf;
2570
2571 p_buf->p_buffer=(struct clawbuf *)p_buff;
2572 /* initialize read command */
2573 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2574 p_buf-> read.cda = (__u32)__pa(p_buff);
2575 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2576 p_buf-> read.count = privptr->p_env->read_size;
2577
2578 /* initialize read_h command */
2579 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2580 p_buf-> read_h.cda =
2581 (__u32)__pa(&(p_buf->header));
2582 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2583 p_buf-> read_h.count = sizeof(struct clawh);
2584
2585 /* initialize Signal command */
2586 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2587 p_buf-> signal.cda =
2588 (__u32)__pa(&(pClawH->flag));
2589 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2590 p_buf-> signal.count = 1;
2591
2592 /* initialize r_TIC_1 command */
2593 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2594 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2595 p_buf-> r_TIC_1.flags = 0;
2596 p_buf-> r_TIC_1.count = 0;
2597
2598 /* initialize r_read_FF command */
2599 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2600 p_buf-> r_read_FF.cda =
2601 (__u32)__pa(&(pClawH->flag));
2602 p_buf-> r_read_FF.flags =
2603 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2604 p_buf-> r_read_FF.count = 1;
2605
2606 /* initialize r_TIC_2 */
2607 memcpy(&p_buf->r_TIC_2,
2608 &p_buf->r_TIC_1, sizeof(struct ccw1));
2609
2610 /* initialize Header */
2611 p_buf->header.length=0xffff;
2612 p_buf->header.opcode=0xff;
2613 p_buf->header.flag=CLAW_PENDING;
2614
2615 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
2616 ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
2617 & PAGE_MASK) ) {
2618 p_buff= p_buff+privptr->p_env->read_size;
2619 }
2620 else {
2621 p_buff=
2622 (void *)((unsigned long)
2623 (p_buff+2*(privptr->p_env->read_size) -1)
2624 & PAGE_MASK) ;
2625 }
2626 } /* for read_buffers */
2627 } /* read_size < PAGE_SIZE */
2628 else { /* read Size >= PAGE_SIZE */
2629
2630 #ifdef DEBUGMSG
2631 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2632 dev->name,__FUNCTION__);
2633 #endif
2634 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2635 p_buff = (void *)__get_free_pages(__GFP_DMA,
2636 (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
2637 if (p_buff==NULL) {
2638 printk(KERN_INFO "%s: %s() __get_free_pages for read "
2639 "buf failed : get is for %d pages\n",
2640 dev->name,__FUNCTION__,
2641 privptr->p_buff_pages_perread );
2642 free_pages((unsigned long)privptr->p_buff_ccw,
2643 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2644 /* free the write pages */
2645 p_buf=privptr->p_buff_write;
2646 while (p_buf!=NULL) {
2647 free_pages((unsigned long)p_buf->p_buffer,
2648 (int)pages_to_order_of_mag(
2649 privptr->p_buff_pages_perwrite ));
2650 p_buf=p_buf->next;
2651 }
2652 /* free any read pages already alloc */
2653 p_buf=privptr->p_buff_read;
2654 while (p_buf!=NULL) {
2655 free_pages((unsigned long)p_buf->p_buffer,
2656 (int)pages_to_order_of_mag(
2657 privptr->p_buff_pages_perread ));
2658 p_buf=p_buf->next;
2659 }
2660 privptr->p_buff_ccw=NULL;
2661 privptr->p_buff_write=NULL;
2662 #ifdef FUNCTRACE
2663 printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
2664 dev->name,__FUNCTION__,
2665 __LINE__);
2666 #endif
2667 return -ENOMEM;
2668 }
2669 memset(p_buff, 0x00, privptr->p_env->read_size);
2670 p_buf = p_free_chain;
2671 privptr->p_buff_read = p_buf;
2672 p_free_chain = p_buf->next;
2673
2674 if (p_last_CCWB==NULL) {
2675 p_buf->next=NULL;
2676 real_TIC_address=0;
2677 p_last_CCWB=p_buf;
2678 }
2679 else {
2680 p_buf->next=p_first_CCWB;
2681 real_TIC_address=
2682 (addr_t)__pa(
2683 &p_first_CCWB -> read );
2684 }
2685
2686 p_first_CCWB=p_buf;
2687 /* save buff address */
2688 p_buf->p_buffer=(struct clawbuf *)p_buff;
2689 /* initialize read command */
2690 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2691 p_buf-> read.cda = (__u32)__pa(p_buff);
2692 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2693 p_buf-> read.count = privptr->p_env->read_size;
2694
2695 /* initialize read_h command */
2696 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2697 p_buf-> read_h.cda =
2698 (__u32)__pa(&(p_buf->header));
2699 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2700 p_buf-> read_h.count = sizeof(struct clawh);
2701
2702 /* initialize Signal command */
2703 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2704 p_buf-> signal.cda =
2705 (__u32)__pa(&(pClawH->flag));
2706 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2707 p_buf-> signal.count = 1;
2708
2709 /* initialize r_TIC_1 command */
2710 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2711 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2712 p_buf-> r_TIC_1.flags = 0;
2713 p_buf-> r_TIC_1.count = 0;
2714
2715 /* initialize r_read_FF command */
2716 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2717 p_buf-> r_read_FF.cda =
2718 (__u32)__pa(&(pClawH->flag));
2719 p_buf-> r_read_FF.flags =
2720 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2721 p_buf-> r_read_FF.count = 1;
2722
2723 /* initialize r_TIC_2 */
2724 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2725 sizeof(struct ccw1));
2726
2727 /* initialize Header */
2728 p_buf->header.length=0xffff;
2729 p_buf->header.opcode=0xff;
2730 p_buf->header.flag=CLAW_PENDING;
2731
2732 } /* For read_buffers */
2733 } /* read_size >= PAGE_SIZE */
2734 } /* pBuffread = NULL */
2735 #ifdef DEBUGMSG
2736 printk(KERN_INFO "%s: %s() > End build claw read free chain \n",
2737 dev->name,__FUNCTION__);
2738 p_buf=p_first_CCWB;
2739 while (p_buf!=NULL) {
2740 dumpit((char *)p_buf, sizeof(struct ccwbk));
2741 p_buf=p_buf->next;
2742 }
2743
2744 #endif
2745 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
2746 privptr->buffs_alloc = 1;
2747 #ifdef FUNCTRACE
2748 printk(KERN_INFO "%s: %s() exit on line %d\n",
2749 dev->name,__FUNCTION__,__LINE__);
2750 #endif
2751 return 0;
2752 } /* end of init_ccw_bk */
2753
2754 /*-------------------------------------------------------------------*
2755 * *
2756 * probe_error *
2757 * *
2758 *--------------------------------------------------------------------*/
2759
2760 static void
2761 probe_error( struct ccwgroup_device *cgdev)
2762 {
2763 struct claw_privbk *privptr;
2764 #ifdef FUNCTRACE
2765 printk(KERN_INFO "%s enter \n",__FUNCTION__);
2766 #endif
2767 CLAW_DBF_TEXT(4,trace,"proberr");
2768 #ifdef DEBUGMSG
2769 printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
2770 dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
2771 #endif
2772 privptr=(struct claw_privbk *)cgdev->dev.driver_data;
2773 if (privptr!=NULL) {
2774 kfree(privptr->p_env);
2775 privptr->p_env=NULL;
2776 kfree(privptr->p_mtc_envelope);
2777 privptr->p_mtc_envelope=NULL;
2778 kfree(privptr);
2779 privptr=NULL;
2780 }
2781 #ifdef FUNCTRACE
2782 printk(KERN_INFO "%s > exit on line %d\n",
2783 __FUNCTION__,__LINE__);
2784 #endif
2785
2786 return;
2787 } /* probe_error */
2788
2789
2790
2791 /*-------------------------------------------------------------------*
2792 * claw_process_control *
2793 * *
2794 * *
2795 *--------------------------------------------------------------------*/
2796
2797 static int
2798 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2799 {
2800
2801 struct clawbuf *p_buf;
2802 struct clawctl ctlbk;
2803 struct clawctl *p_ctlbk;
2804 char temp_host_name[8];
2805 char temp_ws_name[8];
2806 struct claw_privbk *privptr;
2807 struct claw_env *p_env;
2808 struct sysval *p_sysval;
2809 struct conncmd *p_connect=NULL;
2810 int rc;
2811 struct chbk *p_ch = NULL;
2812 #ifdef FUNCTRACE
2813 printk(KERN_INFO "%s: %s() > enter \n",
2814 dev->name,__FUNCTION__);
2815 #endif
2816 CLAW_DBF_TEXT(2,setup,"clw_cntl");
2817 #ifdef DEBUGMSG
2818 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2819 dumpit((char *) dev, sizeof(struct net_device));
2820 printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
2821 dumpit((char *) p_ccw, sizeof(struct ccwbk *));
2822 #endif
2823 udelay(1000); /* Wait a ms for the control packets to
2824 *catch up to each other */
2825 privptr=dev->priv;
2826 p_env=privptr->p_env;
2827 memcpy( &temp_host_name, p_env->host_name, 8);
2828 memcpy( &temp_ws_name, p_env->adapter_name , 8);
2829 printk(KERN_INFO "%s: CLAW device %.8s: "
2830 "Received Control Packet\n",
2831 dev->name, temp_ws_name);
2832 if (privptr->release_pend==1) {
2833 #ifdef FUNCTRACE
2834 printk(KERN_INFO "%s: %s() > "
2835 "exit on line %d, rc=0\n",
2836 dev->name,__FUNCTION__,__LINE__);
2837 #endif
2838 return 0;
2839 }
2840 p_buf=p_ccw->p_buffer;
2841 p_ctlbk=&ctlbk;
2842 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2843 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2844 } else {
2845 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2846 }
2847 #ifdef IOTRACE
2848 printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
2849 dumpit((char *)p_ctlbk, sizeof(struct clawctl));
2850 #endif
2851 switch (p_ctlbk->command)
2852 {
2853 case SYSTEM_VALIDATE_REQUEST:
2854 if (p_ctlbk->version!=CLAW_VERSION_ID) {
2855 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2856 CLAW_RC_WRONG_VERSION );
2857 printk("%s: %d is wrong version id. "
2858 "Expected %d\n",
2859 dev->name, p_ctlbk->version,
2860 CLAW_VERSION_ID);
2861 }
2862 p_sysval=(struct sysval *)&(p_ctlbk->data);
2863 printk( "%s: Recv Sys Validate Request: "
2864 "Vers=%d,link_id=%d,Corr=%d,WS name=%."
2865 "8s,Host name=%.8s\n",
2866 dev->name, p_ctlbk->version,
2867 p_ctlbk->linkid,
2868 p_ctlbk->correlator,
2869 p_sysval->WS_name,
2870 p_sysval->host_name);
2871 if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
2872 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2873 CLAW_RC_NAME_MISMATCH );
2874 CLAW_DBF_TEXT(2,setup,"HSTBAD");
2875 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
2876 CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
2877 printk(KERN_INFO "%s: Host name mismatch\n",
2878 dev->name);
2879 printk(KERN_INFO "%s: Received :%s: "
2880 "expected :%s: \n",
2881 dev->name,
2882 p_sysval->host_name,
2883 temp_host_name);
2884 }
2885 if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
2886 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2887 CLAW_RC_NAME_MISMATCH );
2888 CLAW_DBF_TEXT(2,setup,"WSNBAD");
2889 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
2890 CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
2891 printk(KERN_INFO "%s: WS name mismatch\n",
2892 dev->name);
2893 printk(KERN_INFO "%s: Received :%s: "
2894 "expected :%s: \n",
2895 dev->name,
2896 p_sysval->WS_name,
2897 temp_ws_name);
2898 }
2899 if (( p_sysval->write_frame_size < p_env->write_size) &&
2900 ( p_env->packing == 0)) {
2901 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2902 CLAW_RC_HOST_RCV_TOO_SMALL );
2903 printk(KERN_INFO "%s: host write size is too "
2904 "small\n", dev->name);
2905 CLAW_DBF_TEXT(2,setup,"wrtszbad");
2906 }
2907 if (( p_sysval->read_frame_size < p_env->read_size) &&
2908 ( p_env->packing == 0)) {
2909 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2910 CLAW_RC_HOST_RCV_TOO_SMALL );
2911 printk(KERN_INFO "%s: host read size is too "
2912 "small\n", dev->name);
2913 CLAW_DBF_TEXT(2,setup,"rdsizbad");
2914 }
2915 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
2916 printk("%s: CLAW device %.8s: System validate"
2917 " completed.\n",dev->name, temp_ws_name);
2918 printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
2919 p_sysval->read_frame_size,p_sysval->write_frame_size);
2920 privptr->system_validate_comp=1;
2921 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
2922 p_env->packing = PACKING_ASK;
2923 }
2924 claw_strt_conn_req(dev);
2925 break;
2926
2927 case SYSTEM_VALIDATE_RESPONSE:
2928 p_sysval=(struct sysval *)&(p_ctlbk->data);
2929 printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
2930 "WS name=%.8s,Host name=%.8s\n",
2931 dev->name,
2932 p_ctlbk->version,
2933 p_ctlbk->correlator,
2934 p_ctlbk->rc,
2935 p_sysval->WS_name,
2936 p_sysval->host_name);
2937 switch (p_ctlbk->rc)
2938 {
2939 case 0:
2940 printk(KERN_INFO "%s: CLAW device "
2941 "%.8s: System validate "
2942 "completed.\n",
2943 dev->name, temp_ws_name);
2944 if (privptr->system_validate_comp == 0)
2945 claw_strt_conn_req(dev);
2946 privptr->system_validate_comp=1;
2947 break;
2948 case CLAW_RC_NAME_MISMATCH:
2949 printk(KERN_INFO "%s: Sys Validate "
2950 "Resp : Host, WS name is "
2951 "mismatch\n",
2952 dev->name);
2953 break;
2954 case CLAW_RC_WRONG_VERSION:
2955 printk(KERN_INFO "%s: Sys Validate "
2956 "Resp : Wrong version\n",
2957 dev->name);
2958 break;
2959 case CLAW_RC_HOST_RCV_TOO_SMALL:
2960 printk(KERN_INFO "%s: Sys Validate "
2961 "Resp : bad frame size\n",
2962 dev->name);
2963 break;
2964 default:
2965 printk(KERN_INFO "%s: Sys Validate "
2966 "error code=%d \n",
2967 dev->name, p_ctlbk->rc );
2968 break;
2969 }
2970 break;
2971
2972 case CONNECTION_REQUEST:
2973 p_connect=(struct conncmd *)&(p_ctlbk->data);
2974 printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2975 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2976 dev->name,
2977 p_ctlbk->version,
2978 p_ctlbk->linkid,
2979 p_ctlbk->correlator,
2980 p_connect->host_name,
2981 p_connect->WS_name);
2982 if (privptr->active_link_ID!=0 ) {
2983 claw_snd_disc(dev, p_ctlbk);
2984 printk(KERN_INFO "%s: Conn Req error : "
2985 "already logical link is active \n",
2986 dev->name);
2987 }
2988 if (p_ctlbk->linkid!=1 ) {
2989 claw_snd_disc(dev, p_ctlbk);
2990 printk(KERN_INFO "%s: Conn Req error : "
2991 "req logical link id is not 1\n",
2992 dev->name);
2993 }
2994 rc=find_link(dev,
2995 p_connect->host_name, p_connect->WS_name);
2996 if (rc!=0) {
2997 claw_snd_disc(dev, p_ctlbk);
2998 printk(KERN_INFO "%s: Conn Req error : "
2999 "req appl name does not match\n",
3000 dev->name);
3001 }
3002 claw_send_control(dev,
3003 CONNECTION_CONFIRM, p_ctlbk->linkid,
3004 p_ctlbk->correlator,
3005 0, p_connect->host_name,
3006 p_connect->WS_name);
3007 if (p_env->packing == PACKING_ASK) {
3008 printk("%s: Now Pack ask\n",dev->name);
3009 p_env->packing = PACK_SEND;
3010 claw_snd_conn_req(dev,0);
3011 }
3012 printk(KERN_INFO "%s: CLAW device %.8s: Connection "
3013 "completed link_id=%d.\n",
3014 dev->name, temp_ws_name,
3015 p_ctlbk->linkid);
3016 privptr->active_link_ID=p_ctlbk->linkid;
3017 p_ch=&privptr->channel[WRITE];
3018 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
3019 break;
3020 case CONNECTION_RESPONSE:
3021 p_connect=(struct conncmd *)&(p_ctlbk->data);
3022 printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
3023 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
3024 dev->name,
3025 p_ctlbk->version,
3026 p_ctlbk->linkid,
3027 p_ctlbk->correlator,
3028 p_ctlbk->rc,
3029 p_connect->host_name,
3030 p_connect->WS_name);
3031
3032 if (p_ctlbk->rc !=0 ) {
3033 printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
3034 dev->name, p_ctlbk->rc);
3035 return 1;
3036 }
3037 rc=find_link(dev,
3038 p_connect->host_name, p_connect->WS_name);
3039 if (rc!=0) {
3040 claw_snd_disc(dev, p_ctlbk);
3041 printk(KERN_INFO "%s: Conn Resp error: "
3042 "req appl name does not match\n",
3043 dev->name);
3044 }
3045 /* should be until CONNECTION_CONFIRM */
3046 privptr->active_link_ID = - (p_ctlbk->linkid);
3047 break;
3048 case CONNECTION_CONFIRM:
3049 p_connect=(struct conncmd *)&(p_ctlbk->data);
3050 printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
3051 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
3052 dev->name,
3053 p_ctlbk->version,
3054 p_ctlbk->linkid,
3055 p_ctlbk->correlator,
3056 p_connect->host_name,
3057 p_connect->WS_name);
3058 if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
3059 privptr->active_link_ID=p_ctlbk->linkid;
3060 if (p_env->packing > PACKING_ASK) {
3061 printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
3062 p_env->packing = DO_PACKED;
3063 }
3064 p_ch=&privptr->channel[WRITE];
3065 wake_up(&p_ch->wait);
3066 }
3067 else {
3068 printk(KERN_INFO "%s: Conn confirm: "
3069 "unexpected linkid=%d \n",
3070 dev->name, p_ctlbk->linkid);
3071 claw_snd_disc(dev, p_ctlbk);
3072 }
3073 break;
3074 case DISCONNECT:
3075 printk(KERN_INFO "%s: Disconnect: "
3076 "Vers=%d,link_id=%d,Corr=%d\n",
3077 dev->name, p_ctlbk->version,
3078 p_ctlbk->linkid, p_ctlbk->correlator);
3079 if ((p_ctlbk->linkid == 2) &&
3080 (p_env->packing == PACK_SEND)) {
3081 privptr->active_link_ID = 1;
3082 p_env->packing = DO_PACKED;
3083 }
3084 else
3085 privptr->active_link_ID=0;
3086 break;
3087 case CLAW_ERROR:
3088 printk(KERN_INFO "%s: CLAW ERROR detected\n",
3089 dev->name);
3090 break;
3091 default:
3092 printk(KERN_INFO "%s: Unexpected command code=%d \n",
3093 dev->name, p_ctlbk->command);
3094 break;
3095 }
3096
3097 #ifdef FUNCTRACE
3098 printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
3099 dev->name,__FUNCTION__,__LINE__);
3100 #endif
3101
3102 return 0;
3103 } /* end of claw_process_control */
3104
3105
3106 /*-------------------------------------------------------------------*
3107 * claw_send_control *
3108 * *
3109 *--------------------------------------------------------------------*/
3110
3111 static int
3112 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
3113 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
3114 {
3115 struct claw_privbk *privptr;
3116 struct clawctl *p_ctl;
3117 struct sysval *p_sysval;
3118 struct conncmd *p_connect;
3119 struct sk_buff *skb;
3120
3121 #ifdef FUNCTRACE
3122 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
3123 #endif
3124 CLAW_DBF_TEXT(2,setup,"sndcntl");
3125 #ifdef DEBUGMSG
3126 printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
3127 printk(KERN_INFO "%s: variable type = 0x%X, link = "
3128 "%d, correlator = %d, rc = %d\n",
3129 dev->name,type, link, correlator, rc);
3130 printk(KERN_INFO "%s: variable local_name = %s, "
3131 "remote_name = %s\n",dev->name, local_name, remote_name);
3132 #endif
3133 privptr=dev->priv;
3134 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3135
3136 p_ctl->command=type;
3137 p_ctl->version=CLAW_VERSION_ID;
3138 p_ctl->linkid=link;
3139 p_ctl->correlator=correlator;
3140 p_ctl->rc=rc;
3141
3142 p_sysval=(struct sysval *)&p_ctl->data;
3143 p_connect=(struct conncmd *)&p_ctl->data;
3144
3145 switch (p_ctl->command) {
3146 case SYSTEM_VALIDATE_REQUEST:
3147 case SYSTEM_VALIDATE_RESPONSE:
3148 memcpy(&p_sysval->host_name, local_name, 8);
3149 memcpy(&p_sysval->WS_name, remote_name, 8);
3150 if (privptr->p_env->packing > 0) {
3151 p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
3152 p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
3153 } else {
3154 /* how big is the piggest group of packets */
3155 p_sysval->read_frame_size=privptr->p_env->read_size;
3156 p_sysval->write_frame_size=privptr->p_env->write_size;
3157 }
3158 memset(&p_sysval->reserved, 0x00, 4);
3159 break;
3160 case CONNECTION_REQUEST:
3161 case CONNECTION_RESPONSE:
3162 case CONNECTION_CONFIRM:
3163 case DISCONNECT:
3164 memcpy(&p_sysval->host_name, local_name, 8);
3165 memcpy(&p_sysval->WS_name, remote_name, 8);
3166 if (privptr->p_env->packing > 0) {
3167 /* How big is the biggest packet */
3168 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
3169 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
3170 } else {
3171 memset(&p_connect->reserved1, 0x00, 4);
3172 memset(&p_connect->reserved2, 0x00, 4);
3173 }
3174 break;
3175 default:
3176 break;
3177 }
3178
3179 /* write Control Record to the device */
3180
3181
3182 skb = dev_alloc_skb(sizeof(struct clawctl));
3183 if (!skb) {
3184 printk( "%s:%s low on mem, returning...\n",
3185 dev->name,__FUNCTION__);
3186 #ifdef DEBUG
3187 printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
3188 dev->name,__FUNCTION__);
3189 #endif
3190 return -ENOMEM;
3191 }
3192 memcpy(skb_put(skb, sizeof(struct clawctl)),
3193 p_ctl, sizeof(struct clawctl));
3194 #ifdef IOTRACE
3195 printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
3196 dumpit((char *)p_ctl,sizeof(struct clawctl));
3197 #endif
3198 if (privptr->p_env->packing >= PACK_SEND)
3199 claw_hw_tx(skb, dev, 1);
3200 else
3201 claw_hw_tx(skb, dev, 0);
3202 #ifdef FUNCTRACE
3203 printk(KERN_INFO "%s:%s Exit on line %d\n",
3204 dev->name,__FUNCTION__,__LINE__);
3205 #endif
3206
3207 return 0;
3208 } /* end of claw_send_control */
3209
3210 /*-------------------------------------------------------------------*
3211 * claw_snd_conn_req *
3212 * *
3213 *--------------------------------------------------------------------*/
3214 static int
3215 claw_snd_conn_req(struct net_device *dev, __u8 link)
3216 {
3217 int rc;
3218 struct claw_privbk *privptr=dev->priv;
3219 struct clawctl *p_ctl;
3220
3221 #ifdef FUNCTRACE
3222 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3223 #endif
3224 CLAW_DBF_TEXT(2,setup,"snd_conn");
3225 #ifdef DEBUGMSG
3226 printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
3227 dumpit((char *) dev, sizeof(struct net_device));
3228 #endif
3229 rc = 1;
3230 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3231 p_ctl->linkid = link;
3232 if ( privptr->system_validate_comp==0x00 ) {
3233 #ifdef FUNCTRACE
3234 printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
3235 dev->name,__FUNCTION__,__LINE__);
3236 #endif
3237 return rc;
3238 }
3239 if (privptr->p_env->packing == PACKING_ASK )
3240 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3241 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
3242 if (privptr->p_env->packing == PACK_SEND) {
3243 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3244 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
3245 }
3246 if (privptr->p_env->packing == 0)
3247 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3248 HOST_APPL_NAME, privptr->p_env->api_type);
3249 #ifdef FUNCTRACE
3250 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3251 dev->name,__FUNCTION__,__LINE__, rc);
3252 #endif
3253 return rc;
3254
3255 } /* end of claw_snd_conn_req */
3256
3257
3258 /*-------------------------------------------------------------------*
3259 * claw_snd_disc *
3260 * *
3261 *--------------------------------------------------------------------*/
3262
3263 static int
3264 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
3265 {
3266 int rc;
3267 struct conncmd * p_connect;
3268
3269 #ifdef FUNCTRACE
3270 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3271 #endif
3272 CLAW_DBF_TEXT(2,setup,"snd_dsc");
3273 #ifdef DEBUGMSG
3274 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3275 dumpit((char *) dev, sizeof(struct net_device));
3276 printk(KERN_INFO "%s: variable p_ctl",dev->name);
3277 dumpit((char *) p_ctl, sizeof(struct clawctl));
3278 #endif
3279 p_connect=(struct conncmd *)&p_ctl->data;
3280
3281 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
3282 p_ctl->correlator, 0,
3283 p_connect->host_name, p_connect->WS_name);
3284 #ifdef FUNCTRACE
3285 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3286 dev->name,__FUNCTION__, __LINE__, rc);
3287 #endif
3288 return rc;
3289 } /* end of claw_snd_disc */
3290
3291
3292 /*-------------------------------------------------------------------*
3293 * claw_snd_sys_validate_rsp *
3294 * *
3295 *--------------------------------------------------------------------*/
3296
3297 static int
3298 claw_snd_sys_validate_rsp(struct net_device *dev,
3299 struct clawctl *p_ctl, __u32 return_code)
3300 {
3301 struct claw_env * p_env;
3302 struct claw_privbk *privptr;
3303 int rc;
3304
3305 #ifdef FUNCTRACE
3306 printk(KERN_INFO "%s:%s Enter\n",
3307 dev->name,__FUNCTION__);
3308 #endif
3309 CLAW_DBF_TEXT(2,setup,"chkresp");
3310 #ifdef DEBUGMSG
3311 printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
3312 dev->name, return_code);
3313 dumpit((char *) dev, sizeof(struct net_device));
3314 printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
3315 dumpit((char *) p_ctl, sizeof(struct clawctl));
3316 #endif
3317 privptr = dev->priv;
3318 p_env=privptr->p_env;
3319 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
3320 p_ctl->linkid,
3321 p_ctl->correlator,
3322 return_code,
3323 p_env->host_name,
3324 p_env->adapter_name );
3325 #ifdef FUNCTRACE
3326 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3327 dev->name,__FUNCTION__,__LINE__, rc);
3328 #endif
3329 return rc;
3330 } /* end of claw_snd_sys_validate_rsp */
3331
3332 /*-------------------------------------------------------------------*
3333 * claw_strt_conn_req *
3334 * *
3335 *--------------------------------------------------------------------*/
3336
3337 static int
3338 claw_strt_conn_req(struct net_device *dev )
3339 {
3340 int rc;
3341
3342 #ifdef FUNCTRACE
3343 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3344 #endif
3345 CLAW_DBF_TEXT(2,setup,"conn_req");
3346 #ifdef DEBUGMSG
3347 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3348 dumpit((char *) dev, sizeof(struct net_device));
3349 #endif
3350 rc=claw_snd_conn_req(dev, 1);
3351 #ifdef FUNCTRACE
3352 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3353 dev->name,__FUNCTION__,__LINE__, rc);
3354 #endif
3355 return rc;
3356 } /* end of claw_strt_conn_req */
3357
3358
3359
3360 /*-------------------------------------------------------------------*
3361 * claw_stats *
3362 *-------------------------------------------------------------------*/
3363
3364 static struct
3365 net_device_stats *claw_stats(struct net_device *dev)
3366 {
3367 struct claw_privbk *privptr;
3368 #ifdef FUNCTRACE
3369 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3370 #endif
3371 CLAW_DBF_TEXT(4,trace,"stats");
3372 privptr = dev->priv;
3373 #ifdef FUNCTRACE
3374 printk(KERN_INFO "%s:%s Exit on line %d\n",
3375 dev->name,__FUNCTION__,__LINE__);
3376 #endif
3377 return &privptr->stats;
3378 } /* end of claw_stats */
3379
3380
3381 /*-------------------------------------------------------------------*
3382 * unpack_read *
3383 * *
3384 *--------------------------------------------------------------------*/
3385 static void
3386 unpack_read(struct net_device *dev )
3387 {
3388 struct sk_buff *skb;
3389 struct claw_privbk *privptr;
3390 struct claw_env *p_env;
3391 struct ccwbk *p_this_ccw;
3392 struct ccwbk *p_first_ccw;
3393 struct ccwbk *p_last_ccw;
3394 struct clawph *p_packh;
3395 void *p_packd;
3396 struct clawctl *p_ctlrec=NULL;
3397
3398 __u32 len_of_data;
3399 __u32 pack_off;
3400 __u8 link_num;
3401 __u8 mtc_this_frm=0;
3402 __u32 bytes_to_mov;
3403 struct chbk *p_ch = NULL;
3404 int i=0;
3405 int p=0;
3406
3407 #ifdef FUNCTRACE
3408 printk(KERN_INFO "%s:%s enter \n",dev->name,__FUNCTION__);
3409 #endif
3410 CLAW_DBF_TEXT(4,trace,"unpkread");
3411 p_first_ccw=NULL;
3412 p_last_ccw=NULL;
3413 p_packh=NULL;
3414 p_packd=NULL;
3415 privptr=dev->priv;
3416 p_env = privptr->p_env;
3417 p_this_ccw=privptr->p_read_active_first;
3418 i=0;
3419 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
3420 #ifdef IOTRACE
3421 printk(KERN_INFO "%s p_this_ccw \n",dev->name);
3422 dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
3423 printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
3424 " pk=%d \n",dev->name,p_env->packing);
3425 dumpit((char *)p_this_ccw->p_buffer, 64 );
3426 #endif
3427 pack_off = 0;
3428 p = 0;
3429 p_this_ccw->header.flag=CLAW_PENDING;
3430 privptr->p_read_active_first=p_this_ccw->next;
3431 p_this_ccw->next=NULL;
3432 p_packh = (struct clawph *)p_this_ccw->p_buffer;
3433 if ((p_env->packing == PACK_SEND) &&
3434 (p_packh->len == 32) &&
3435 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
3436 p_packh++; /* peek past pack header */
3437 p_ctlrec = (struct clawctl *)p_packh;
3438 p_packh--; /* un peek */
3439 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
3440 (p_ctlrec->command == CONNECTION_CONFIRM))
3441 p_env->packing = DO_PACKED;
3442 }
3443 if (p_env->packing == DO_PACKED)
3444 link_num=p_packh->link_num;
3445 else
3446 link_num=p_this_ccw->header.opcode / 8;
3447 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
3448 #ifdef DEBUGMSG
3449 printk(KERN_INFO "%s: %s > More_to_come is ON\n",
3450 dev->name,__FUNCTION__);
3451 #endif
3452 mtc_this_frm=1;
3453 if (p_this_ccw->header.length!=
3454 privptr->p_env->read_size ) {
3455 printk(KERN_INFO " %s: Invalid frame detected "
3456 "length is %02x\n" ,
3457 dev->name, p_this_ccw->header.length);
3458 }
3459 }
3460
3461 if (privptr->mtc_skipping) {
3462 /*
3463 * We're in the mode of skipping past a
3464 * multi-frame message
3465 * that we can't process for some reason or other.
3466 * The first frame without the More-To-Come flag is
3467 * the last frame of the skipped message.
3468 */
3469 /* in case of More-To-Come not set in this frame */
3470 if (mtc_this_frm==0) {
3471 privptr->mtc_skipping=0; /* Ok, the end */
3472 privptr->mtc_logical_link=-1;
3473 }
3474 #ifdef DEBUGMSG
3475 printk(KERN_INFO "%s:%s goto next "
3476 "frame from MoretoComeSkip \n",
3477 dev->name,__FUNCTION__);
3478 #endif
3479 goto NextFrame;
3480 }
3481
3482 if (link_num==0) {
3483 claw_process_control(dev, p_this_ccw);
3484 #ifdef DEBUGMSG
3485 printk(KERN_INFO "%s:%s goto next "
3486 "frame from claw_process_control \n",
3487 dev->name,__FUNCTION__);
3488 #endif
3489 CLAW_DBF_TEXT(4,trace,"UnpkCntl");
3490 goto NextFrame;
3491 }
3492 unpack_next:
3493 if (p_env->packing == DO_PACKED) {
3494 if (pack_off > p_env->read_size)
3495 goto NextFrame;
3496 p_packd = p_this_ccw->p_buffer+pack_off;
3497 p_packh = (struct clawph *) p_packd;
3498 if ((p_packh->len == 0) || /* all done with this frame? */
3499 (p_packh->flag != 0))
3500 goto NextFrame;
3501 bytes_to_mov = p_packh->len;
3502 pack_off += bytes_to_mov+sizeof(struct clawph);
3503 p++;
3504 } else {
3505 bytes_to_mov=p_this_ccw->header.length;
3506 }
3507 if (privptr->mtc_logical_link<0) {
3508 #ifdef DEBUGMSG
3509 printk(KERN_INFO "%s: %s mtc_logical_link < 0 \n",
3510 dev->name,__FUNCTION__);
3511 #endif
3512
3513 /*
3514 * if More-To-Come is set in this frame then we don't know
3515 * length of entire message, and hence have to allocate
3516 * large buffer */
3517
3518 /* We are starting a new envelope */
3519 privptr->mtc_offset=0;
3520 privptr->mtc_logical_link=link_num;
3521 }
3522
3523 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
3524 /* error */
3525 #ifdef DEBUGMSG
3526 printk(KERN_INFO "%s: %s > goto next "
3527 "frame from MoretoComeSkip \n",
3528 dev->name,
3529 __FUNCTION__);
3530 printk(KERN_INFO " bytes_to_mov %d > (MAX_ENVELOPE_"
3531 "SIZE-privptr->mtc_offset %d)\n",
3532 bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
3533 #endif
3534 privptr->stats.rx_frame_errors++;
3535 goto NextFrame;
3536 }
3537 if (p_env->packing == DO_PACKED) {
3538 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3539 p_packd+sizeof(struct clawph), bytes_to_mov);
3540
3541 } else {
3542 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3543 p_this_ccw->p_buffer, bytes_to_mov);
3544 }
3545 #ifdef DEBUGMSG
3546 printk(KERN_INFO "%s: %s() received data \n",
3547 dev->name,__FUNCTION__);
3548 if (p_env->packing == DO_PACKED)
3549 dumpit((char *)p_packd+sizeof(struct clawph),32);
3550 else
3551 dumpit((char *)p_this_ccw->p_buffer, 32);
3552 printk(KERN_INFO "%s: %s() bytelength %d \n",
3553 dev->name,__FUNCTION__,bytes_to_mov);
3554 #endif
3555 if (mtc_this_frm==0) {
3556 len_of_data=privptr->mtc_offset+bytes_to_mov;
3557 skb=dev_alloc_skb(len_of_data);
3558 if (skb) {
3559 memcpy(skb_put(skb,len_of_data),
3560 privptr->p_mtc_envelope,
3561 len_of_data);
3562 skb->dev=dev;
3563 skb_reset_mac_header(skb);
3564 skb->protocol=htons(ETH_P_IP);
3565 skb->ip_summed=CHECKSUM_UNNECESSARY;
3566 privptr->stats.rx_packets++;
3567 privptr->stats.rx_bytes+=len_of_data;
3568 netif_rx(skb);
3569 #ifdef DEBUGMSG
3570 printk(KERN_INFO "%s: %s() netif_"
3571 "rx(skb) completed \n",
3572 dev->name,__FUNCTION__);
3573 #endif
3574 }
3575 else {
3576 privptr->stats.rx_dropped++;
3577 printk(KERN_WARNING "%s: %s() low on memory\n",
3578 dev->name,__FUNCTION__);
3579 }
3580 privptr->mtc_offset=0;
3581 privptr->mtc_logical_link=-1;
3582 }
3583 else {
3584 privptr->mtc_offset+=bytes_to_mov;
3585 }
3586 if (p_env->packing == DO_PACKED)
3587 goto unpack_next;
3588 NextFrame:
3589 /*
3590 * Remove ThisCCWblock from active read queue, and add it
3591 * to queue of free blocks to be reused.
3592 */
3593 i++;
3594 p_this_ccw->header.length=0xffff;
3595 p_this_ccw->header.opcode=0xff;
3596 /*
3597 * add this one to the free queue for later reuse
3598 */
3599 if (p_first_ccw==NULL) {
3600 p_first_ccw = p_this_ccw;
3601 }
3602 else {
3603 p_last_ccw->next = p_this_ccw;
3604 }
3605 p_last_ccw = p_this_ccw;
3606 /*
3607 * chain to next block on active read queue
3608 */
3609 p_this_ccw = privptr->p_read_active_first;
3610 CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
3611 } /* end of while */
3612
3613 /* check validity */
3614
3615 #ifdef IOTRACE
3616 printk(KERN_INFO "%s:%s processed frame is %d \n",
3617 dev->name,__FUNCTION__,i);
3618 printk(KERN_INFO "%s:%s F:%lx L:%lx\n",
3619 dev->name,
3620 __FUNCTION__,
3621 (unsigned long)p_first_ccw,
3622 (unsigned long)p_last_ccw);
3623 #endif
3624 CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
3625 add_claw_reads(dev, p_first_ccw, p_last_ccw);
3626 p_ch=&privptr->channel[READ];
3627 claw_strt_read(dev, LOCK_YES);
3628 #ifdef FUNCTRACE
3629 printk(KERN_INFO "%s: %s exit on line %d\n",
3630 dev->name, __FUNCTION__, __LINE__);
3631 #endif
3632 return;
3633 } /* end of unpack_read */
3634
3635 /*-------------------------------------------------------------------*
3636 * claw_strt_read *
3637 * *
3638 *--------------------------------------------------------------------*/
3639 static void
3640 claw_strt_read (struct net_device *dev, int lock )
3641 {
3642 int rc = 0;
3643 __u32 parm;
3644 unsigned long saveflags = 0;
3645 struct claw_privbk *privptr=dev->priv;
3646 struct ccwbk*p_ccwbk;
3647 struct chbk *p_ch;
3648 struct clawh *p_clawh;
3649 p_ch=&privptr->channel[READ];
3650
3651 #ifdef FUNCTRACE
3652 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3653 printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
3654 dumpit((char *) dev, sizeof(struct net_device));
3655 #endif
3656 CLAW_DBF_TEXT(4,trace,"StRdNter");
3657 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3658 p_clawh->flag=CLAW_IDLE; /* 0x00 */
3659
3660 if ((privptr->p_write_active_first!=NULL &&
3661 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
3662 (privptr->p_read_active_first!=NULL &&
3663 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
3664 p_clawh->flag=CLAW_BUSY; /* 0xff */
3665 }
3666 #ifdef DEBUGMSG
3667 printk(KERN_INFO "%s:%s state-%02x\n" ,
3668 dev->name,__FUNCTION__, p_ch->claw_state);
3669 #endif
3670 if (lock==LOCK_YES) {
3671 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
3672 }
3673 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3674 #ifdef DEBUGMSG
3675 printk(KERN_INFO "%s: HOT READ started in %s\n" ,
3676 dev->name,__FUNCTION__);
3677 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3678 dumpit((char *)&p_clawh->flag , 1);
3679 #endif
3680 CLAW_DBF_TEXT(4,trace,"HotRead");
3681 p_ccwbk=privptr->p_read_active_first;
3682 parm = (unsigned long) p_ch;
3683 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
3684 0xff, 0);
3685 if (rc != 0) {
3686 ccw_check_return_code(p_ch->cdev, rc);
3687 }
3688 }
3689 else {
3690 #ifdef DEBUGMSG
3691 printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
3692 dev->name,__FUNCTION__);
3693 #endif
3694 CLAW_DBF_TEXT(2,trace,"ReadAct");
3695 }
3696
3697 if (lock==LOCK_YES) {
3698 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
3699 }
3700 #ifdef FUNCTRACE
3701 printk(KERN_INFO "%s:%s Exit on line %d\n",
3702 dev->name,__FUNCTION__,__LINE__);
3703 #endif
3704 CLAW_DBF_TEXT(4,trace,"StRdExit");
3705 return;
3706 } /* end of claw_strt_read */
3707
3708 /*-------------------------------------------------------------------*
3709 * claw_strt_out_IO *
3710 * *
3711 *--------------------------------------------------------------------*/
3712
3713 static void
3714 claw_strt_out_IO( struct net_device *dev )
3715 {
3716 int rc = 0;
3717 unsigned long parm;
3718 struct claw_privbk *privptr;
3719 struct chbk *p_ch;
3720 struct ccwbk *p_first_ccw;
3721
3722 #ifdef FUNCTRACE
3723 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3724 #endif
3725 if (!dev) {
3726 return;
3727 }
3728 privptr=(struct claw_privbk *)dev->priv;
3729 p_ch=&privptr->channel[WRITE];
3730
3731 #ifdef DEBUGMSG
3732 printk(KERN_INFO "%s:%s state-%02x\n" ,
3733 dev->name,__FUNCTION__,p_ch->claw_state);
3734 #endif
3735 CLAW_DBF_TEXT(4,trace,"strt_io");
3736 p_first_ccw=privptr->p_write_active_first;
3737
3738 if (p_ch->claw_state == CLAW_STOP)
3739 return;
3740 if (p_first_ccw == NULL) {
3741 #ifdef FUNCTRACE
3742 printk(KERN_INFO "%s:%s Exit on line %d\n",
3743 dev->name,__FUNCTION__,__LINE__);
3744 #endif
3745 return;
3746 }
3747 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3748 parm = (unsigned long) p_ch;
3749 #ifdef DEBUGMSG
3750 printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
3751 dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
3752 #endif
3753 CLAW_DBF_TEXT(2,trace,"StWrtIO");
3754 rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
3755 0xff, 0);
3756 if (rc != 0) {
3757 ccw_check_return_code(p_ch->cdev, rc);
3758 }
3759 }
3760 dev->trans_start = jiffies;
3761 #ifdef FUNCTRACE
3762 printk(KERN_INFO "%s:%s Exit on line %d\n",
3763 dev->name,__FUNCTION__,__LINE__);
3764 #endif
3765
3766 return;
3767 } /* end of claw_strt_out_IO */
3768
3769 /*-------------------------------------------------------------------*
3770 * Free write buffers *
3771 * *
3772 *--------------------------------------------------------------------*/
3773
3774 static void
3775 claw_free_wrt_buf( struct net_device *dev )
3776 {
3777
3778 struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
3779 struct ccwbk*p_first_ccw;
3780 struct ccwbk*p_last_ccw;
3781 struct ccwbk*p_this_ccw;
3782 struct ccwbk*p_next_ccw;
3783 #ifdef IOTRACE
3784 struct ccwbk*p_buf;
3785 #endif
3786 #ifdef FUNCTRACE
3787 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3788 printk(KERN_INFO "%s: free count = %d variable dev =\n",
3789 dev->name,privptr->write_free_count);
3790 #endif
3791 CLAW_DBF_TEXT(4,trace,"freewrtb");
3792 /* scan the write queue to free any completed write packets */
3793 p_first_ccw=NULL;
3794 p_last_ccw=NULL;
3795 #ifdef IOTRACE
3796 printk(KERN_INFO "%s: Dump current CCW chain \n",dev->name );
3797 p_buf=privptr->p_write_active_first;
3798 while (p_buf!=NULL) {
3799 dumpit((char *)p_buf, sizeof(struct ccwbk));
3800 p_buf=p_buf->next;
3801 }
3802 if (p_buf==NULL) {
3803 printk(KERN_INFO "%s: privptr->p_write_"
3804 "active_first==NULL\n",dev->name );
3805 }
3806 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3807 dumpit((char *)p_buf, sizeof(struct endccw));
3808 #endif
3809 p_this_ccw=privptr->p_write_active_first;
3810 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
3811 {
3812 p_next_ccw = p_this_ccw->next;
3813 if (((p_next_ccw!=NULL) &&
3814 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
3815 ((p_this_ccw == privptr->p_write_active_last) &&
3816 (p_this_ccw->header.flag!=CLAW_PENDING))) {
3817 /* The next CCW is OK or this is */
3818 /* the last CCW...free it @A1A */
3819 privptr->p_write_active_first=p_this_ccw->next;
3820 p_this_ccw->header.flag=CLAW_PENDING;
3821 p_this_ccw->next=privptr->p_write_free_chain;
3822 privptr->p_write_free_chain=p_this_ccw;
3823 ++privptr->write_free_count;
3824 privptr->stats.tx_bytes+= p_this_ccw->write.count;
3825 p_this_ccw=privptr->p_write_active_first;
3826 privptr->stats.tx_packets++;
3827 }
3828 else {
3829 break;
3830 }
3831 }
3832 if (privptr->write_free_count!=0) {
3833 claw_clearbit_busy(TB_NOBUFFER,dev);
3834 }
3835 /* whole chain removed? */
3836 if (privptr->p_write_active_first==NULL) {
3837 privptr->p_write_active_last=NULL;
3838 #ifdef DEBUGMSG
3839 printk(KERN_INFO "%s:%s p_write_"
3840 "active_first==NULL\n",dev->name,__FUNCTION__);
3841 #endif
3842 }
3843 #ifdef IOTRACE
3844 printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name );
3845 p_buf=privptr->p_write_active_first;
3846 while (p_buf!=NULL) {
3847 dumpit((char *)p_buf, sizeof(struct ccwbk));
3848 p_buf=p_buf->next;
3849 }
3850 if (p_buf==NULL) {
3851 printk(KERN_INFO "%s: privptr->p_write_active_"
3852 "first==NULL\n",dev->name );
3853 }
3854 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3855 dumpit((char *)p_buf, sizeof(struct endccw));
3856 #endif
3857
3858 CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
3859 #ifdef FUNCTRACE
3860 printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
3861 dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
3862 #endif
3863 return;
3864 }
3865
3866 /*-------------------------------------------------------------------*
3867 * claw free netdevice *
3868 * *
3869 *--------------------------------------------------------------------*/
3870 static void
3871 claw_free_netdevice(struct net_device * dev, int free_dev)
3872 {
3873 struct claw_privbk *privptr;
3874 #ifdef FUNCTRACE
3875 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3876 #endif
3877 CLAW_DBF_TEXT(2,setup,"free_dev");
3878
3879 if (!dev)
3880 return;
3881 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3882 privptr = dev->priv;
3883 if (dev->flags & IFF_RUNNING)
3884 claw_release(dev);
3885 if (privptr) {
3886 privptr->channel[READ].ndev = NULL; /* say it's free */
3887 }
3888 dev->priv=NULL;
3889 #ifdef MODULE
3890 if (free_dev) {
3891 free_netdev(dev);
3892 }
3893 #endif
3894 CLAW_DBF_TEXT(2,setup,"feee_ok");
3895 #ifdef FUNCTRACE
3896 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3897 #endif
3898 }
3899
3900 /**
3901 * Claw init netdevice
3902 * Initialize everything of the net device except the name and the
3903 * channel structs.
3904 */
3905 static void
3906 claw_init_netdevice(struct net_device * dev)
3907 {
3908 #ifdef FUNCTRACE
3909 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3910 #endif
3911 CLAW_DBF_TEXT(2,setup,"init_dev");
3912 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3913 if (!dev) {
3914 printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
3915 __FUNCTION__,__LINE__);
3916 CLAW_DBF_TEXT(2,setup,"baddev");
3917 return;
3918 }
3919 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
3920 dev->hard_start_xmit = claw_tx;
3921 dev->open = claw_open;
3922 dev->stop = claw_release;
3923 dev->get_stats = claw_stats;
3924 dev->change_mtu = claw_change_mtu;
3925 dev->hard_header_len = 0;
3926 dev->addr_len = 0;
3927 dev->type = ARPHRD_SLIP;
3928 dev->tx_queue_len = 1300;
3929 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
3930 #ifdef FUNCTRACE
3931 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3932 #endif
3933 CLAW_DBF_TEXT(2,setup,"initok");
3934 return;
3935 }
3936
3937 /**
3938 * Init a new channel in the privptr->channel[i].
3939 *
3940 * @param cdev The ccw_device to be added.
3941 *
3942 * @return 0 on success, !0 on error.
3943 */
3944 static int
3945 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
3946 {
3947 struct chbk *p_ch;
3948 struct ccw_dev_id dev_id;
3949
3950 #ifdef FUNCTRACE
3951 printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
3952 #endif
3953 CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
3954 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
3955 p_ch = &privptr->channel[i];
3956 p_ch->cdev = cdev;
3957 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
3958 ccw_device_get_id(cdev, &dev_id);
3959 p_ch->devno = dev_id.devno;
3960 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
3961 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
3962 p_ch->id,__FUNCTION__);
3963 #ifdef FUNCTRACE
3964 printk(KERN_INFO "%s:%s Exit on line %d\n",
3965 p_ch->id,__FUNCTION__,__LINE__);
3966 #endif
3967 return -ENOMEM;
3968 }
3969 #ifdef FUNCTRACE
3970 printk(KERN_INFO "%s:%s Exit on line %d\n",
3971 cdev->dev.bus_id,__FUNCTION__,__LINE__);
3972 #endif
3973 return 0;
3974 }
3975
3976
3977 /**
3978 *
3979 * Setup an interface.
3980 *
3981 * @param cgdev Device to be setup.
3982 *
3983 * @returns 0 on success, !0 on failure.
3984 */
3985 static int
3986 claw_new_device(struct ccwgroup_device *cgdev)
3987 {
3988 struct claw_privbk *privptr;
3989 struct claw_env *p_env;
3990 struct net_device *dev;
3991 int ret;
3992 struct ccw_dev_id dev_id;
3993
3994 pr_debug("%s() called\n", __FUNCTION__);
3995 printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
3996 CLAW_DBF_TEXT(2,setup,"new_dev");
3997 privptr = cgdev->dev.driver_data;
3998 cgdev->cdev[READ]->dev.driver_data = privptr;
3999 cgdev->cdev[WRITE]->dev.driver_data = privptr;
4000 if (!privptr)
4001 return -ENODEV;
4002 p_env = privptr->p_env;
4003 ccw_device_get_id(cgdev->cdev[READ], &dev_id);
4004 p_env->devno[READ] = dev_id.devno;
4005 ccw_device_get_id(cgdev->cdev[WRITE], &dev_id);
4006 p_env->devno[WRITE] = dev_id.devno;
4007 ret = add_channel(cgdev->cdev[0],0,privptr);
4008 if (ret == 0)
4009 ret = add_channel(cgdev->cdev[1],1,privptr);
4010 if (ret != 0) {
4011 printk(KERN_WARNING
4012 "add channel failed "
4013 "with ret = %d\n", ret);
4014 goto out;
4015 }
4016 ret = ccw_device_set_online(cgdev->cdev[READ]);
4017 if (ret != 0) {
4018 printk(KERN_WARNING
4019 "claw: ccw_device_set_online %s READ failed "
4020 "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
4021 goto out;
4022 }
4023 ret = ccw_device_set_online(cgdev->cdev[WRITE]);
4024 if (ret != 0) {
4025 printk(KERN_WARNING
4026 "claw: ccw_device_set_online %s WRITE failed "
4027 "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
4028 goto out;
4029 }
4030 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
4031 if (!dev) {
4032 printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
4033 goto out;
4034 }
4035 dev->priv = privptr;
4036 cgdev->dev.driver_data = privptr;
4037 cgdev->cdev[READ]->dev.driver_data = privptr;
4038 cgdev->cdev[WRITE]->dev.driver_data = privptr;
4039 /* sysfs magic */
4040 SET_NETDEV_DEV(dev, &cgdev->dev);
4041 if (register_netdev(dev) != 0) {
4042 claw_free_netdevice(dev, 1);
4043 CLAW_DBF_TEXT(2,trace,"regfail");
4044 goto out;
4045 }
4046 dev->flags &=~IFF_RUNNING;
4047 if (privptr->buffs_alloc == 0) {
4048 ret=init_ccw_bk(dev);
4049 if (ret !=0) {
4050 printk(KERN_WARNING
4051 "claw: init_ccw_bk failed with ret=%d\n", ret);
4052 unregister_netdev(dev);
4053 claw_free_netdevice(dev,1);
4054 CLAW_DBF_TEXT(2,trace,"ccwmem");
4055 goto out;
4056 }
4057 }
4058 privptr->channel[READ].ndev = dev;
4059 privptr->channel[WRITE].ndev = dev;
4060 privptr->p_env->ndev = dev;
4061
4062 printk(KERN_INFO "%s:readsize=%d writesize=%d "
4063 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
4064 dev->name, p_env->read_size,
4065 p_env->write_size, p_env->read_buffers,
4066 p_env->write_buffers, p_env->devno[READ],
4067 p_env->devno[WRITE]);
4068 printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
4069 ":%.8s api_type: %.8s\n",
4070 dev->name, p_env->host_name,
4071 p_env->adapter_name , p_env->api_type);
4072 return 0;
4073 out:
4074 ccw_device_set_offline(cgdev->cdev[1]);
4075 ccw_device_set_offline(cgdev->cdev[0]);
4076
4077 return -ENODEV;
4078 }
4079
4080 static void
4081 claw_purge_skb_queue(struct sk_buff_head *q)
4082 {
4083 struct sk_buff *skb;
4084
4085 CLAW_DBF_TEXT(4,trace,"purgque");
4086
4087 while ((skb = skb_dequeue(q))) {
4088 atomic_dec(&skb->users);
4089 dev_kfree_skb_any(skb);
4090 }
4091 }
4092
4093 /**
4094 * Shutdown an interface.
4095 *
4096 * @param cgdev Device to be shut down.
4097 *
4098 * @returns 0 on success, !0 on failure.
4099 */
4100 static int
4101 claw_shutdown_device(struct ccwgroup_device *cgdev)
4102 {
4103 struct claw_privbk *priv;
4104 struct net_device *ndev;
4105 int ret;
4106
4107 pr_debug("%s() called\n", __FUNCTION__);
4108 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4109 priv = cgdev->dev.driver_data;
4110 if (!priv)
4111 return -ENODEV;
4112 ndev = priv->channel[READ].ndev;
4113 if (ndev) {
4114 /* Close the device */
4115 printk(KERN_INFO
4116 "%s: shuting down \n",ndev->name);
4117 if (ndev->flags & IFF_RUNNING)
4118 ret = claw_release(ndev);
4119 ndev->flags &=~IFF_RUNNING;
4120 unregister_netdev(ndev);
4121 ndev->priv = NULL; /* cgdev data, not ndev's to free */
4122 claw_free_netdevice(ndev, 1);
4123 priv->channel[READ].ndev = NULL;
4124 priv->channel[WRITE].ndev = NULL;
4125 priv->p_env->ndev = NULL;
4126 }
4127 ccw_device_set_offline(cgdev->cdev[1]);
4128 ccw_device_set_offline(cgdev->cdev[0]);
4129 return 0;
4130 }
4131
4132 static void
4133 claw_remove_device(struct ccwgroup_device *cgdev)
4134 {
4135 struct claw_privbk *priv;
4136
4137 pr_debug("%s() called\n", __FUNCTION__);
4138 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4139 priv = cgdev->dev.driver_data;
4140 if (!priv) {
4141 printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
4142 return;
4143 }
4144 printk(KERN_INFO "claw: %s() called %s will be removed.\n",
4145 __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
4146 if (cgdev->state == CCWGROUP_ONLINE)
4147 claw_shutdown_device(cgdev);
4148 claw_remove_files(&cgdev->dev);
4149 kfree(priv->p_mtc_envelope);
4150 priv->p_mtc_envelope=NULL;
4151 kfree(priv->p_env);
4152 priv->p_env=NULL;
4153 kfree(priv->channel[0].irb);
4154 priv->channel[0].irb=NULL;
4155 kfree(priv->channel[1].irb);
4156 priv->channel[1].irb=NULL;
4157 kfree(priv);
4158 cgdev->dev.driver_data=NULL;
4159 cgdev->cdev[READ]->dev.driver_data = NULL;
4160 cgdev->cdev[WRITE]->dev.driver_data = NULL;
4161 put_device(&cgdev->dev);
4162 }
4163
4164
4165 /*
4166 * sysfs attributes
4167 */
4168 static ssize_t
4169 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
4170 {
4171 struct claw_privbk *priv;
4172 struct claw_env * p_env;
4173
4174 priv = dev->driver_data;
4175 if (!priv)
4176 return -ENODEV;
4177 p_env = priv->p_env;
4178 return sprintf(buf, "%s\n",p_env->host_name);
4179 }
4180
4181 static ssize_t
4182 claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4183 {
4184 struct claw_privbk *priv;
4185 struct claw_env * p_env;
4186
4187 priv = dev->driver_data;
4188 if (!priv)
4189 return -ENODEV;
4190 p_env = priv->p_env;
4191 if (count > MAX_NAME_LEN+1)
4192 return -EINVAL;
4193 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
4194 strncpy(p_env->host_name,buf, count);
4195 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
4196 p_env->host_name[MAX_NAME_LEN] = 0x00;
4197 CLAW_DBF_TEXT(2,setup,"HstnSet");
4198 CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
4199
4200 return count;
4201 }
4202
4203 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
4204
4205 static ssize_t
4206 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
4207 {
4208 struct claw_privbk *priv;
4209 struct claw_env * p_env;
4210
4211 priv = dev->driver_data;
4212 if (!priv)
4213 return -ENODEV;
4214 p_env = priv->p_env;
4215 return sprintf(buf, "%s\n",p_env->adapter_name);
4216 }
4217
4218 static ssize_t
4219 claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4220 {
4221 struct claw_privbk *priv;
4222 struct claw_env * p_env;
4223
4224 priv = dev->driver_data;
4225 if (!priv)
4226 return -ENODEV;
4227 p_env = priv->p_env;
4228 if (count > MAX_NAME_LEN+1)
4229 return -EINVAL;
4230 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
4231 strncpy(p_env->adapter_name,buf, count);
4232 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
4233 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
4234 CLAW_DBF_TEXT(2,setup,"AdnSet");
4235 CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
4236
4237 return count;
4238 }
4239
4240 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
4241
4242 static ssize_t
4243 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
4244 {
4245 struct claw_privbk *priv;
4246 struct claw_env * p_env;
4247
4248 priv = dev->driver_data;
4249 if (!priv)
4250 return -ENODEV;
4251 p_env = priv->p_env;
4252 return sprintf(buf, "%s\n",
4253 p_env->api_type);
4254 }
4255
4256 static ssize_t
4257 claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4258 {
4259 struct claw_privbk *priv;
4260 struct claw_env * p_env;
4261
4262 priv = dev->driver_data;
4263 if (!priv)
4264 return -ENODEV;
4265 p_env = priv->p_env;
4266 if (count > MAX_NAME_LEN+1)
4267 return -EINVAL;
4268 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
4269 strncpy(p_env->api_type,buf, count);
4270 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
4271 p_env->api_type[MAX_NAME_LEN] = 0x00;
4272 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
4273 p_env->read_size=DEF_PACK_BUFSIZE;
4274 p_env->write_size=DEF_PACK_BUFSIZE;
4275 p_env->packing=PACKING_ASK;
4276 CLAW_DBF_TEXT(2,setup,"PACKING");
4277 }
4278 else {
4279 p_env->packing=0;
4280 p_env->read_size=CLAW_FRAME_SIZE;
4281 p_env->write_size=CLAW_FRAME_SIZE;
4282 CLAW_DBF_TEXT(2,setup,"ApiSet");
4283 }
4284 CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
4285 return count;
4286 }
4287
4288 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
4289
4290 static ssize_t
4291 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4292 {
4293 struct claw_privbk *priv;
4294 struct claw_env * p_env;
4295
4296 priv = dev->driver_data;
4297 if (!priv)
4298 return -ENODEV;
4299 p_env = priv->p_env;
4300 return sprintf(buf, "%d\n", p_env->write_buffers);
4301 }
4302
4303 static ssize_t
4304 claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4305 {
4306 struct claw_privbk *priv;
4307 struct claw_env * p_env;
4308 int nnn,max;
4309
4310 priv = dev->driver_data;
4311 if (!priv)
4312 return -ENODEV;
4313 p_env = priv->p_env;
4314 sscanf(buf, "%i", &nnn);
4315 if (p_env->packing) {
4316 max = 64;
4317 }
4318 else {
4319 max = 512;
4320 }
4321 if ((nnn > max ) || (nnn < 2))
4322 return -EINVAL;
4323 p_env->write_buffers = nnn;
4324 CLAW_DBF_TEXT(2,setup,"Wbufset");
4325 CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
4326 return count;
4327 }
4328
4329 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
4330
4331 static ssize_t
4332 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4333 {
4334 struct claw_privbk *priv;
4335 struct claw_env * p_env;
4336
4337 priv = dev->driver_data;
4338 if (!priv)
4339 return -ENODEV;
4340 p_env = priv->p_env;
4341 return sprintf(buf, "%d\n", p_env->read_buffers);
4342 }
4343
4344 static ssize_t
4345 claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4346 {
4347 struct claw_privbk *priv;
4348 struct claw_env *p_env;
4349 int nnn,max;
4350
4351 priv = dev->driver_data;
4352 if (!priv)
4353 return -ENODEV;
4354 p_env = priv->p_env;
4355 sscanf(buf, "%i", &nnn);
4356 if (p_env->packing) {
4357 max = 64;
4358 }
4359 else {
4360 max = 512;
4361 }
4362 if ((nnn > max ) || (nnn < 2))
4363 return -EINVAL;
4364 p_env->read_buffers = nnn;
4365 CLAW_DBF_TEXT(2,setup,"Rbufset");
4366 CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
4367 return count;
4368 }
4369
4370 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
4371
4372 static struct attribute *claw_attr[] = {
4373 &dev_attr_read_buffer.attr,
4374 &dev_attr_write_buffer.attr,
4375 &dev_attr_adapter_name.attr,
4376 &dev_attr_api_type.attr,
4377 &dev_attr_host_name.attr,
4378 NULL,
4379 };
4380
4381 static struct attribute_group claw_attr_group = {
4382 .attrs = claw_attr,
4383 };
4384
4385 static int
4386 claw_add_files(struct device *dev)
4387 {
4388 pr_debug("%s() called\n", __FUNCTION__);
4389 CLAW_DBF_TEXT(2,setup,"add_file");
4390 return sysfs_create_group(&dev->kobj, &claw_attr_group);
4391 }
4392
4393 static void
4394 claw_remove_files(struct device *dev)
4395 {
4396 pr_debug("%s() called\n", __FUNCTION__);
4397 CLAW_DBF_TEXT(2,setup,"rem_file");
4398 sysfs_remove_group(&dev->kobj, &claw_attr_group);
4399 }
4400
4401 /*--------------------------------------------------------------------*
4402 * claw_init and cleanup *
4403 *---------------------------------------------------------------------*/
4404
4405 static void __exit
4406 claw_cleanup(void)
4407 {
4408 unregister_cu3088_discipline(&claw_group_driver);
4409 claw_unregister_debug_facility();
4410 printk(KERN_INFO "claw: Driver unloaded\n");
4411
4412 }
4413
4414 /**
4415 * Initialize module.
4416 * This is called just after the module is loaded.
4417 *
4418 * @return 0 on success, !0 on error.
4419 */
4420 static int __init
4421 claw_init(void)
4422 {
4423 int ret = 0;
4424 printk(KERN_INFO "claw: starting driver\n");
4425
4426 #ifdef FUNCTRACE
4427 printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
4428 #endif
4429 ret = claw_register_debug_facility();
4430 if (ret) {
4431 printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
4432 __FUNCTION__,ret);
4433 return ret;
4434 }
4435 CLAW_DBF_TEXT(2,setup,"init_mod");
4436 ret = register_cu3088_discipline(&claw_group_driver);
4437 if (ret) {
4438 claw_unregister_debug_facility();
4439 printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
4440 __FUNCTION__,ret);
4441 }
4442 #ifdef FUNCTRACE
4443 printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
4444 #endif
4445 return ret;
4446 }
4447
4448 module_init(claw_init);
4449 module_exit(claw_cleanup);
4450
4451
4452
4453 /*--------------------------------------------------------------------*
4454 * End of File *
4455 *---------------------------------------------------------------------*/
4456
4457
WRT350N Kernel Patches