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[PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason
[deliverable/linux.git] / drivers / s390 / net / claw.c
1 /*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
5 * $Revision: 1.38 $ $Date: 2005/08/29 09:47:04 $
6 *
7 * Linux for zSeries version
8 * Copyright (C) 2002,2005 IBM Corporation
9 * Author(s) Original code written by:
10 * Kazuo Iimura (iimura@jp.ibm.com)
11 * Rewritten by
12 * Andy Richter (richtera@us.ibm.com)
13 * Marc Price (mwprice@us.ibm.com)
14 *
15 * sysfs parms:
16 * group x.x.rrrr,x.x.wwww
17 * read_buffer nnnnnnn
18 * write_buffer nnnnnn
19 * host_name aaaaaaaa
20 * adapter_name aaaaaaaa
21 * api_type aaaaaaaa
22 *
23 * eg.
24 * group 0.0.0200 0.0.0201
25 * read_buffer 25
26 * write_buffer 20
27 * host_name LINUX390
28 * adapter_name RS6K
29 * api_type TCPIP
30 *
31 * where
32 *
33 * The device id is decided by the order entries
34 * are added to the group the first is claw0 the second claw1
35 * up to CLAW_MAX_DEV
36 *
37 * rrrr - the first of 2 consecutive device addresses used for the
38 * CLAW protocol.
39 * The specified address is always used as the input (Read)
40 * channel and the next address is used as the output channel.
41 *
42 * wwww - the second of 2 consecutive device addresses used for
43 * the CLAW protocol.
44 * The specified address is always used as the output
45 * channel and the previous address is used as the input channel.
46 *
47 * read_buffer - specifies number of input buffers to allocate.
48 * write_buffer - specifies number of output buffers to allocate.
49 * host_name - host name
50 * adaptor_name - adaptor name
51 * api_type - API type TCPIP or API will be sent and expected
52 * as ws_name
53 *
54 * Note the following requirements:
55 * 1) host_name must match the configured adapter_name on the remote side
56 * 2) adaptor_name must match the configured host name on the remote side
57 *
58 * Change History
59 * 1.00 Initial release shipped
60 * 1.10 Changes for Buffer allocation
61 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
62 * 1.25 Added Packing support
63 */
64 #include <asm/bitops.h>
65 #include <asm/ccwdev.h>
66 #include <asm/ccwgroup.h>
67 #include <asm/debug.h>
68 #include <asm/idals.h>
69 #include <asm/io.h>
70
71 #include <linux/ctype.h>
72 #include <linux/delay.h>
73 #include <linux/errno.h>
74 #include <linux/if_arp.h>
75 #include <linux/init.h>
76 #include <linux/interrupt.h>
77 #include <linux/ip.h>
78 #include <linux/kernel.h>
79 #include <linux/module.h>
80 #include <linux/netdevice.h>
81 #include <linux/etherdevice.h>
82 #include <linux/proc_fs.h>
83 #include <linux/sched.h>
84 #include <linux/signal.h>
85 #include <linux/skbuff.h>
86 #include <linux/slab.h>
87 #include <linux/string.h>
88 #include <linux/tcp.h>
89 #include <linux/timer.h>
90 #include <linux/types.h>
91
92 #include "cu3088.h"
93 #include "claw.h"
94
95 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
96 MODULE_DESCRIPTION("Linux for zSeries CLAW Driver\n" \
97 "Copyright 2000,2005 IBM Corporation\n");
98 MODULE_LICENSE("GPL");
99
100 /* Debugging is based on DEBUGMSG, IOTRACE, or FUNCTRACE options:
101 DEBUGMSG - Enables output of various debug messages in the code
102 IOTRACE - Enables output of CCW and other IO related traces
103 FUNCTRACE - Enables output of function entry/exit trace
104 Define any combination of above options to enable tracing
105
106 CLAW also uses the s390dbf file system see claw_trace and claw_setup
107 */
108
109 /* following enables tracing */
110 //#define DEBUGMSG
111 //#define IOTRACE
112 //#define FUNCTRACE
113
114 #ifdef DEBUGMSG
115 #define DEBUG
116 #endif
117
118 #ifdef IOTRACE
119 #define DEBUG
120 #endif
121
122 #ifdef FUNCTRACE
123 #define DEBUG
124 #endif
125
126 char debug_buffer[255];
127 /**
128 * Debug Facility Stuff
129 */
130 static debug_info_t *claw_dbf_setup;
131 static debug_info_t *claw_dbf_trace;
132
133 /**
134 * CLAW Debug Facility functions
135 */
136 static void
137 claw_unregister_debug_facility(void)
138 {
139 if (claw_dbf_setup)
140 debug_unregister(claw_dbf_setup);
141 if (claw_dbf_trace)
142 debug_unregister(claw_dbf_trace);
143 }
144
145 static int
146 claw_register_debug_facility(void)
147 {
148 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
149 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
150 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
151 printk(KERN_WARNING "Not enough memory for debug facility.\n");
152 claw_unregister_debug_facility();
153 return -ENOMEM;
154 }
155 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
156 debug_set_level(claw_dbf_setup, 2);
157 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
158 debug_set_level(claw_dbf_trace, 2);
159 return 0;
160 }
161
162 static inline void
163 claw_set_busy(struct net_device *dev)
164 {
165 ((struct claw_privbk *) dev->priv)->tbusy=1;
166 eieio();
167 }
168
169 static inline void
170 claw_clear_busy(struct net_device *dev)
171 {
172 clear_bit(0, &(((struct claw_privbk *) dev->priv)->tbusy));
173 netif_wake_queue(dev);
174 eieio();
175 }
176
177 static inline int
178 claw_check_busy(struct net_device *dev)
179 {
180 eieio();
181 return ((struct claw_privbk *) dev->priv)->tbusy;
182 }
183
184 static inline void
185 claw_setbit_busy(int nr,struct net_device *dev)
186 {
187 netif_stop_queue(dev);
188 set_bit(nr, (void *)&(((struct claw_privbk *)dev->priv)->tbusy));
189 }
190
191 static inline void
192 claw_clearbit_busy(int nr,struct net_device *dev)
193 {
194 clear_bit(nr,(void *)&(((struct claw_privbk *)dev->priv)->tbusy));
195 netif_wake_queue(dev);
196 }
197
198 static inline int
199 claw_test_and_setbit_busy(int nr,struct net_device *dev)
200 {
201 netif_stop_queue(dev);
202 return test_and_set_bit(nr,
203 (void *)&(((struct claw_privbk *) dev->priv)->tbusy));
204 }
205
206
207 /* Functions for the DEV methods */
208
209 static int claw_probe(struct ccwgroup_device *cgdev);
210 static void claw_remove_device(struct ccwgroup_device *cgdev);
211 static void claw_purge_skb_queue(struct sk_buff_head *q);
212 static int claw_new_device(struct ccwgroup_device *cgdev);
213 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
214 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
215 static int claw_change_mtu( struct net_device *dev, int new_mtu);
216 static int claw_open(struct net_device *dev);
217 static void claw_irq_handler(struct ccw_device *cdev,
218 unsigned long intparm, struct irb *irb);
219 static void claw_irq_tasklet ( unsigned long data );
220 static int claw_release(struct net_device *dev);
221 static void claw_write_retry ( struct chbk * p_ch );
222 static void claw_write_next ( struct chbk * p_ch );
223 static void claw_timer ( struct chbk * p_ch );
224
225 /* Functions */
226 static int add_claw_reads(struct net_device *dev,
227 struct ccwbk* p_first, struct ccwbk* p_last);
228 static void inline ccw_check_return_code (struct ccw_device *cdev,
229 int return_code);
230 static void inline ccw_check_unit_check (struct chbk * p_ch,
231 unsigned char sense );
232 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
233 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
234 static int init_ccw_bk(struct net_device *dev);
235 static void probe_error( struct ccwgroup_device *cgdev);
236 static struct net_device_stats *claw_stats(struct net_device *dev);
237 static int inline pages_to_order_of_mag(int num_of_pages);
238 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
239 #ifdef DEBUG
240 static void dumpit (char *buf, int len);
241 #endif
242 /* sysfs Functions */
243 static ssize_t claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf);
244 static ssize_t claw_hname_write(struct device *dev, struct device_attribute *attr,
245 const char *buf, size_t count);
246 static ssize_t claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf);
247 static ssize_t claw_adname_write(struct device *dev, struct device_attribute *attr,
248 const char *buf, size_t count);
249 static ssize_t claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf);
250 static ssize_t claw_apname_write(struct device *dev, struct device_attribute *attr,
251 const char *buf, size_t count);
252 static ssize_t claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
253 static ssize_t claw_wbuff_write(struct device *dev, struct device_attribute *attr,
254 const char *buf, size_t count);
255 static ssize_t claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf);
256 static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr,
257 const char *buf, size_t count);
258 static int claw_add_files(struct device *dev);
259 static void claw_remove_files(struct device *dev);
260
261 /* Functions for System Validate */
262 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
263 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
264 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
265 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
266 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
267 static int claw_snd_sys_validate_rsp(struct net_device *dev,
268 struct clawctl * p_ctl, __u32 return_code);
269 static int claw_strt_conn_req(struct net_device *dev );
270 static void claw_strt_read ( struct net_device *dev, int lock );
271 static void claw_strt_out_IO( struct net_device *dev );
272 static void claw_free_wrt_buf( struct net_device *dev );
273
274 /* Functions for unpack reads */
275 static void unpack_read (struct net_device *dev );
276
277 /* ccwgroup table */
278
279 static struct ccwgroup_driver claw_group_driver = {
280 .owner = THIS_MODULE,
281 .name = "claw",
282 .max_slaves = 2,
283 .driver_id = 0xC3D3C1E6,
284 .probe = claw_probe,
285 .remove = claw_remove_device,
286 .set_online = claw_new_device,
287 .set_offline = claw_shutdown_device,
288 };
289
290 /*
291 *
292 * Key functions
293 */
294
295 /*----------------------------------------------------------------*
296 * claw_probe *
297 * this function is called for each CLAW device. *
298 *----------------------------------------------------------------*/
299 static int
300 claw_probe(struct ccwgroup_device *cgdev)
301 {
302 int rc;
303 struct claw_privbk *privptr=NULL;
304
305 #ifdef FUNCTRACE
306 printk(KERN_INFO "%s Enter\n",__FUNCTION__);
307 #endif
308 CLAW_DBF_TEXT(2,setup,"probe");
309 if (!get_device(&cgdev->dev))
310 return -ENODEV;
311 #ifdef DEBUGMSG
312 printk(KERN_INFO "claw: variable cgdev =\n");
313 dumpit((char *)cgdev, sizeof(struct ccwgroup_device));
314 #endif
315 privptr = kmalloc(sizeof(struct claw_privbk), GFP_KERNEL);
316 if (privptr == NULL) {
317 probe_error(cgdev);
318 put_device(&cgdev->dev);
319 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
320 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
321 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
322 return -ENOMEM;
323 }
324 memset(privptr,0x00,sizeof(struct claw_privbk));
325 privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
326 privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
327 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
328 probe_error(cgdev);
329 put_device(&cgdev->dev);
330 printk(KERN_WARNING "Out of memory %s %s Exit Line %d \n",
331 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
332 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
333 return -ENOMEM;
334 }
335 memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
336 memset(privptr->p_env, 0x00, sizeof(struct claw_env));
337 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
338 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
339 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
340 privptr->p_env->packing = 0;
341 privptr->p_env->write_buffers = 5;
342 privptr->p_env->read_buffers = 5;
343 privptr->p_env->read_size = CLAW_FRAME_SIZE;
344 privptr->p_env->write_size = CLAW_FRAME_SIZE;
345 rc = claw_add_files(&cgdev->dev);
346 if (rc) {
347 probe_error(cgdev);
348 put_device(&cgdev->dev);
349 printk(KERN_WARNING "add_files failed %s %s Exit Line %d \n",
350 cgdev->cdev[0]->dev.bus_id,__FUNCTION__,__LINE__);
351 CLAW_DBF_TEXT_(2,setup,"probex%d",rc);
352 return rc;
353 }
354 printk(KERN_INFO "claw: sysfs files added for %s\n",cgdev->cdev[0]->dev.bus_id);
355 privptr->p_env->p_priv = privptr;
356 cgdev->cdev[0]->handler = claw_irq_handler;
357 cgdev->cdev[1]->handler = claw_irq_handler;
358 cgdev->dev.driver_data = privptr;
359 #ifdef FUNCTRACE
360 printk(KERN_INFO "claw:%s exit on line %d, "
361 "rc = 0\n",__FUNCTION__,__LINE__);
362 #endif
363 CLAW_DBF_TEXT(2,setup,"prbext 0");
364
365 return 0;
366 } /* end of claw_probe */
367
368 /*-------------------------------------------------------------------*
369 * claw_tx *
370 *-------------------------------------------------------------------*/
371
372 static int
373 claw_tx(struct sk_buff *skb, struct net_device *dev)
374 {
375 int rc;
376 struct claw_privbk *privptr=dev->priv;
377 unsigned long saveflags;
378 struct chbk *p_ch;
379
380 #ifdef FUNCTRACE
381 printk(KERN_INFO "%s:%s enter\n",dev->name,__FUNCTION__);
382 #endif
383 CLAW_DBF_TEXT(4,trace,"claw_tx");
384 p_ch=&privptr->channel[WRITE];
385 if (skb == NULL) {
386 printk(KERN_WARNING "%s: null pointer passed as sk_buffer\n",
387 dev->name);
388 privptr->stats.tx_dropped++;
389 #ifdef FUNCTRACE
390 printk(KERN_INFO "%s: %s() exit on line %d, rc = EIO\n",
391 dev->name,__FUNCTION__, __LINE__);
392 #endif
393 CLAW_DBF_TEXT_(2,trace,"clawtx%d",-EIO);
394 return -EIO;
395 }
396
397 #ifdef IOTRACE
398 printk(KERN_INFO "%s: variable sk_buff=\n",dev->name);
399 dumpit((char *) skb, sizeof(struct sk_buff));
400 printk(KERN_INFO "%s: variable dev=\n",dev->name);
401 dumpit((char *) dev, sizeof(struct net_device));
402 #endif
403 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
404 rc=claw_hw_tx( skb, dev, 1 );
405 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
406 #ifdef FUNCTRACE
407 printk(KERN_INFO "%s:%s exit on line %d, rc = %d\n",
408 dev->name, __FUNCTION__, __LINE__, rc);
409 #endif
410 CLAW_DBF_TEXT_(4,trace,"clawtx%d",rc);
411 return rc;
412 } /* end of claw_tx */
413
414 /*------------------------------------------------------------------*
415 * pack the collect queue into an skb and return it *
416 * If not packing just return the top skb from the queue *
417 *------------------------------------------------------------------*/
418
419 static struct sk_buff *
420 claw_pack_skb(struct claw_privbk *privptr)
421 {
422 struct sk_buff *new_skb,*held_skb;
423 struct chbk *p_ch = &privptr->channel[WRITE];
424 struct claw_env *p_env = privptr->p_env;
425 int pkt_cnt,pk_ind,so_far;
426
427 new_skb = NULL; /* assume no dice */
428 pkt_cnt = 0;
429 CLAW_DBF_TEXT(4,trace,"PackSKBe");
430 if (!skb_queue_empty(&p_ch->collect_queue)) {
431 /* some data */
432 held_skb = skb_dequeue(&p_ch->collect_queue);
433 if (held_skb)
434 dev_kfree_skb_any(held_skb);
435 else
436 return NULL;
437 if (p_env->packing != DO_PACKED)
438 return held_skb;
439 /* get a new SKB we will pack at least one */
440 new_skb = dev_alloc_skb(p_env->write_size);
441 if (new_skb == NULL) {
442 atomic_inc(&held_skb->users);
443 skb_queue_head(&p_ch->collect_queue,held_skb);
444 return NULL;
445 }
446 /* we have packed packet and a place to put it */
447 pk_ind = 1;
448 so_far = 0;
449 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
450 while ((pk_ind) && (held_skb != NULL)) {
451 if (held_skb->len+so_far <= p_env->write_size-8) {
452 memcpy(skb_put(new_skb,held_skb->len),
453 held_skb->data,held_skb->len);
454 privptr->stats.tx_packets++;
455 so_far += held_skb->len;
456 pkt_cnt++;
457 dev_kfree_skb_any(held_skb);
458 held_skb = skb_dequeue(&p_ch->collect_queue);
459 if (held_skb)
460 atomic_dec(&held_skb->users);
461 } else {
462 pk_ind = 0;
463 atomic_inc(&held_skb->users);
464 skb_queue_head(&p_ch->collect_queue,held_skb);
465 }
466 }
467 #ifdef IOTRACE
468 printk(KERN_INFO "%s: %s() Packed %d len %d\n",
469 p_env->ndev->name,
470 __FUNCTION__,pkt_cnt,new_skb->len);
471 #endif
472 }
473 CLAW_DBF_TEXT(4,trace,"PackSKBx");
474 return new_skb;
475 }
476
477 /*-------------------------------------------------------------------*
478 * claw_change_mtu *
479 * *
480 *-------------------------------------------------------------------*/
481
482 static int
483 claw_change_mtu(struct net_device *dev, int new_mtu)
484 {
485 struct claw_privbk *privptr=dev->priv;
486 int buff_size;
487 #ifdef FUNCTRACE
488 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
489 #endif
490 #ifdef DEBUGMSG
491 printk(KERN_INFO "variable dev =\n");
492 dumpit((char *) dev, sizeof(struct net_device));
493 printk(KERN_INFO "variable new_mtu = %d\n", new_mtu);
494 #endif
495 CLAW_DBF_TEXT(4,trace,"setmtu");
496 buff_size = privptr->p_env->write_size;
497 if ((new_mtu < 60) || (new_mtu > buff_size)) {
498 #ifdef FUNCTRACE
499 printk(KERN_INFO "%s:%s Exit on line %d, rc=EINVAL\n",
500 dev->name,
501 __FUNCTION__, __LINE__);
502 #endif
503 return -EINVAL;
504 }
505 dev->mtu = new_mtu;
506 #ifdef FUNCTRACE
507 printk(KERN_INFO "%s:%s Exit on line %d\n",dev->name,
508 __FUNCTION__, __LINE__);
509 #endif
510 return 0;
511 } /* end of claw_change_mtu */
512
513
514 /*-------------------------------------------------------------------*
515 * claw_open *
516 * *
517 *-------------------------------------------------------------------*/
518 static int
519 claw_open(struct net_device *dev)
520 {
521
522 int rc;
523 int i;
524 unsigned long saveflags=0;
525 unsigned long parm;
526 struct claw_privbk *privptr;
527 DECLARE_WAITQUEUE(wait, current);
528 struct timer_list timer;
529 struct ccwbk *p_buf;
530
531 #ifdef FUNCTRACE
532 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
533 #endif
534 CLAW_DBF_TEXT(4,trace,"open");
535 if (!dev | (dev->name[0] == 0x00)) {
536 CLAW_DBF_TEXT(2,trace,"BadDev");
537 printk(KERN_WARNING "claw: Bad device at open failing \n");
538 return -ENODEV;
539 }
540 privptr = (struct claw_privbk *)dev->priv;
541 /* allocate and initialize CCW blocks */
542 if (privptr->buffs_alloc == 0) {
543 rc=init_ccw_bk(dev);
544 if (rc) {
545 printk(KERN_INFO "%s:%s Exit on line %d, rc=ENOMEM\n",
546 dev->name,
547 __FUNCTION__, __LINE__);
548 CLAW_DBF_TEXT(2,trace,"openmem");
549 return -ENOMEM;
550 }
551 }
552 privptr->system_validate_comp=0;
553 privptr->release_pend=0;
554 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
555 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
556 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
557 privptr->p_env->packing=PACKING_ASK;
558 } else {
559 privptr->p_env->packing=0;
560 privptr->p_env->read_size=CLAW_FRAME_SIZE;
561 privptr->p_env->write_size=CLAW_FRAME_SIZE;
562 }
563 claw_set_busy(dev);
564 tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
565 (unsigned long) &privptr->channel[READ]);
566 for ( i = 0; i < 2; i++) {
567 CLAW_DBF_TEXT_(2,trace,"opn_ch%d",i);
568 init_waitqueue_head(&privptr->channel[i].wait);
569 /* skb_queue_head_init(&p_ch->io_queue); */
570 if (i == WRITE)
571 skb_queue_head_init(
572 &privptr->channel[WRITE].collect_queue);
573 privptr->channel[i].flag_a = 0;
574 privptr->channel[i].IO_active = 0;
575 privptr->channel[i].flag &= ~CLAW_TIMER;
576 init_timer(&timer);
577 timer.function = (void *)claw_timer;
578 timer.data = (unsigned long)(&privptr->channel[i]);
579 timer.expires = jiffies + 15*HZ;
580 add_timer(&timer);
581 spin_lock_irqsave(get_ccwdev_lock(
582 privptr->channel[i].cdev), saveflags);
583 parm = (unsigned long) &privptr->channel[i];
584 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
585 rc = 0;
586 add_wait_queue(&privptr->channel[i].wait, &wait);
587 rc = ccw_device_halt(
588 (struct ccw_device *)privptr->channel[i].cdev,parm);
589 set_current_state(TASK_INTERRUPTIBLE);
590 spin_unlock_irqrestore(
591 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
592 schedule();
593 set_current_state(TASK_RUNNING);
594 remove_wait_queue(&privptr->channel[i].wait, &wait);
595 if(rc != 0)
596 ccw_check_return_code(privptr->channel[i].cdev, rc);
597 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
598 del_timer(&timer);
599 }
600 if ((((privptr->channel[READ].last_dstat |
601 privptr->channel[WRITE].last_dstat) &
602 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
603 (((privptr->channel[READ].flag |
604 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
605 #ifdef DEBUGMSG
606 printk(KERN_INFO "%s: channel problems during open - read:"
607 " %02x - write: %02x\n",
608 dev->name,
609 privptr->channel[READ].last_dstat,
610 privptr->channel[WRITE].last_dstat);
611 #endif
612 printk(KERN_INFO "%s: remote side is not ready\n", dev->name);
613 CLAW_DBF_TEXT(2,trace,"notrdy");
614
615 for ( i = 0; i < 2; i++) {
616 spin_lock_irqsave(
617 get_ccwdev_lock(privptr->channel[i].cdev),
618 saveflags);
619 parm = (unsigned long) &privptr->channel[i];
620 privptr->channel[i].claw_state = CLAW_STOP;
621 rc = ccw_device_halt(
622 (struct ccw_device *)&privptr->channel[i].cdev,
623 parm);
624 spin_unlock_irqrestore(
625 get_ccwdev_lock(privptr->channel[i].cdev),
626 saveflags);
627 if (rc != 0) {
628 ccw_check_return_code(
629 privptr->channel[i].cdev, rc);
630 }
631 }
632 free_pages((unsigned long)privptr->p_buff_ccw,
633 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
634 if (privptr->p_env->read_size < PAGE_SIZE) {
635 free_pages((unsigned long)privptr->p_buff_read,
636 (int)pages_to_order_of_mag(
637 privptr->p_buff_read_num));
638 }
639 else {
640 p_buf=privptr->p_read_active_first;
641 while (p_buf!=NULL) {
642 free_pages((unsigned long)p_buf->p_buffer,
643 (int)pages_to_order_of_mag(
644 privptr->p_buff_pages_perread ));
645 p_buf=p_buf->next;
646 }
647 }
648 if (privptr->p_env->write_size < PAGE_SIZE ) {
649 free_pages((unsigned long)privptr->p_buff_write,
650 (int)pages_to_order_of_mag(
651 privptr->p_buff_write_num));
652 }
653 else {
654 p_buf=privptr->p_write_active_first;
655 while (p_buf!=NULL) {
656 free_pages((unsigned long)p_buf->p_buffer,
657 (int)pages_to_order_of_mag(
658 privptr->p_buff_pages_perwrite ));
659 p_buf=p_buf->next;
660 }
661 }
662 privptr->buffs_alloc = 0;
663 privptr->channel[READ].flag= 0x00;
664 privptr->channel[WRITE].flag = 0x00;
665 privptr->p_buff_ccw=NULL;
666 privptr->p_buff_read=NULL;
667 privptr->p_buff_write=NULL;
668 claw_clear_busy(dev);
669 #ifdef FUNCTRACE
670 printk(KERN_INFO "%s:%s Exit on line %d, rc=EIO\n",
671 dev->name,__FUNCTION__,__LINE__);
672 #endif
673 CLAW_DBF_TEXT(2,trace,"open EIO");
674 return -EIO;
675 }
676
677 /* Send SystemValidate command */
678
679 claw_clear_busy(dev);
680
681 #ifdef FUNCTRACE
682 printk(KERN_INFO "%s:%s Exit on line %d, rc=0\n",
683 dev->name,__FUNCTION__,__LINE__);
684 #endif
685 CLAW_DBF_TEXT(4,trace,"openok");
686 return 0;
687 } /* end of claw_open */
688
689 /*-------------------------------------------------------------------*
690 * *
691 * claw_irq_handler *
692 * *
693 *--------------------------------------------------------------------*/
694 static void
695 claw_irq_handler(struct ccw_device *cdev,
696 unsigned long intparm, struct irb *irb)
697 {
698 struct chbk *p_ch = NULL;
699 struct claw_privbk *privptr = NULL;
700 struct net_device *dev = NULL;
701 struct claw_env *p_env;
702 struct chbk *p_ch_r=NULL;
703
704
705 #ifdef FUNCTRACE
706 printk(KERN_INFO "%s enter \n",__FUNCTION__);
707 #endif
708 CLAW_DBF_TEXT(4,trace,"clawirq");
709 /* Bypass all 'unsolicited interrupts' */
710 if (!cdev->dev.driver_data) {
711 printk(KERN_WARNING "claw: unsolicited interrupt for device:"
712 "%s received c-%02x d-%02x\n",
713 cdev->dev.bus_id,irb->scsw.cstat, irb->scsw.dstat);
714 #ifdef FUNCTRACE
715 printk(KERN_INFO "claw: %s() "
716 "exit on line %d\n",__FUNCTION__,__LINE__);
717 #endif
718 CLAW_DBF_TEXT(2,trace,"badirq");
719 return;
720 }
721 privptr = (struct claw_privbk *)cdev->dev.driver_data;
722
723 /* Try to extract channel from driver data. */
724 if (privptr->channel[READ].cdev == cdev)
725 p_ch = &privptr->channel[READ];
726 else if (privptr->channel[WRITE].cdev == cdev)
727 p_ch = &privptr->channel[WRITE];
728 else {
729 printk(KERN_WARNING "claw: Can't determine channel for "
730 "interrupt, device %s\n", cdev->dev.bus_id);
731 CLAW_DBF_TEXT(2,trace,"badchan");
732 return;
733 }
734 CLAW_DBF_TEXT_(4,trace,"IRQCH=%d",p_ch->flag);
735
736 dev = (struct net_device *) (p_ch->ndev);
737 p_env=privptr->p_env;
738
739 #ifdef IOTRACE
740 printk(KERN_INFO "%s: interrupt for device: %04x "
741 "received c-%02x d-%02x state-%02x\n",
742 dev->name, p_ch->devno, irb->scsw.cstat,
743 irb->scsw.dstat, p_ch->claw_state);
744 #endif
745
746 /* Copy interruption response block. */
747 memcpy(p_ch->irb, irb, sizeof(struct irb));
748
749 /* Check for good subchannel return code, otherwise error message */
750 if (irb->scsw.cstat && !(irb->scsw.cstat & SCHN_STAT_PCI)) {
751 printk(KERN_INFO "%s: subchannel check for device: %04x -"
752 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
753 dev->name, p_ch->devno,
754 irb->scsw.cstat, irb->scsw.dstat,irb->scsw.cpa);
755 #ifdef IOTRACE
756 dumpit((char *)irb,sizeof(struct irb));
757 dumpit((char *)(unsigned long)irb->scsw.cpa,
758 sizeof(struct ccw1));
759 #endif
760 #ifdef FUNCTRACE
761 printk(KERN_INFO "%s:%s Exit on line %d\n",
762 dev->name,__FUNCTION__,__LINE__);
763 #endif
764 CLAW_DBF_TEXT(2,trace,"chanchk");
765 /* return; */
766 }
767
768 /* Check the reason-code of a unit check */
769 if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
770 ccw_check_unit_check(p_ch, irb->ecw[0]);
771 }
772
773 /* State machine to bring the connection up, down and to restart */
774 p_ch->last_dstat = irb->scsw.dstat;
775
776 switch (p_ch->claw_state) {
777 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
778 #ifdef DEBUGMSG
779 printk(KERN_INFO "%s: CLAW_STOP enter\n", dev->name);
780 #endif
781 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
782 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
783 (p_ch->irb->scsw.stctl ==
784 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
785 #ifdef FUNCTRACE
786 printk(KERN_INFO "%s:%s Exit on line %d\n",
787 dev->name,__FUNCTION__,__LINE__);
788 #endif
789 return;
790 }
791 wake_up(&p_ch->wait); /* wake up claw_release */
792
793 #ifdef DEBUGMSG
794 printk(KERN_INFO "%s: CLAW_STOP exit\n", dev->name);
795 #endif
796 #ifdef FUNCTRACE
797 printk(KERN_INFO "%s:%s Exit on line %d\n",
798 dev->name,__FUNCTION__,__LINE__);
799 #endif
800 CLAW_DBF_TEXT(4,trace,"stop");
801 return;
802
803 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
804 #ifdef DEBUGMSG
805 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO\n",
806 dev->name);
807 #endif
808 if (!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
809 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
810 (p_ch->irb->scsw.stctl ==
811 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
812 #ifdef FUNCTRACE
813 printk(KERN_INFO "%s:%s Exit on line %d\n",
814 dev->name,__FUNCTION__,__LINE__);
815 #endif
816 CLAW_DBF_TEXT(4,trace,"haltio");
817 return;
818 }
819 if (p_ch->flag == CLAW_READ) {
820 p_ch->claw_state = CLAW_START_READ;
821 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
822 }
823 else
824 if (p_ch->flag == CLAW_WRITE) {
825 p_ch->claw_state = CLAW_START_WRITE;
826 /* send SYSTEM_VALIDATE */
827 claw_strt_read(dev, LOCK_NO);
828 claw_send_control(dev,
829 SYSTEM_VALIDATE_REQUEST,
830 0, 0, 0,
831 p_env->host_name,
832 p_env->adapter_name );
833 } else {
834 printk(KERN_WARNING "claw: unsolicited "
835 "interrupt for device:"
836 "%s received c-%02x d-%02x\n",
837 cdev->dev.bus_id,
838 irb->scsw.cstat,
839 irb->scsw.dstat);
840 return;
841 }
842 #ifdef DEBUGMSG
843 printk(KERN_INFO "%s: process CLAW_STAT_HALT_IO exit\n",
844 dev->name);
845 #endif
846 #ifdef FUNCTRACE
847 printk(KERN_INFO "%s:%s Exit on line %d\n",
848 dev->name,__FUNCTION__,__LINE__);
849 #endif
850 CLAW_DBF_TEXT(4,trace,"haltio");
851 return;
852 case CLAW_START_READ:
853 CLAW_DBF_TEXT(4,trace,"ReadIRQ");
854 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
855 clear_bit(0, (void *)&p_ch->IO_active);
856 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
857 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
858 (p_ch->irb->ecw[0]) == 0)
859 {
860 privptr->stats.rx_errors++;
861 printk(KERN_INFO "%s: Restart is "
862 "required after remote "
863 "side recovers \n",
864 dev->name);
865 }
866 #ifdef FUNCTRACE
867 printk(KERN_INFO "%s:%s Exit on line %d\n",
868 dev->name,__FUNCTION__,__LINE__);
869 #endif
870 CLAW_DBF_TEXT(4,trace,"notrdy");
871 return;
872 }
873 if ((p_ch->irb->scsw.cstat & SCHN_STAT_PCI) &&
874 (p_ch->irb->scsw.dstat==0)) {
875 if (test_and_set_bit(CLAW_BH_ACTIVE,
876 (void *)&p_ch->flag_a) == 0) {
877 tasklet_schedule(&p_ch->tasklet);
878 }
879 else {
880 CLAW_DBF_TEXT(4,trace,"PCINoBH");
881 }
882 #ifdef FUNCTRACE
883 printk(KERN_INFO "%s:%s Exit on line %d\n",
884 dev->name,__FUNCTION__,__LINE__);
885 #endif
886 CLAW_DBF_TEXT(4,trace,"PCI_read");
887 return;
888 }
889 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
890 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
891 (p_ch->irb->scsw.stctl ==
892 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
893 #ifdef FUNCTRACE
894 printk(KERN_INFO "%s:%s Exit on line %d\n",
895 dev->name,__FUNCTION__,__LINE__);
896 #endif
897 CLAW_DBF_TEXT(4,trace,"SPend_rd");
898 return;
899 }
900 clear_bit(0, (void *)&p_ch->IO_active);
901 claw_clearbit_busy(TB_RETRY,dev);
902 if (test_and_set_bit(CLAW_BH_ACTIVE,
903 (void *)&p_ch->flag_a) == 0) {
904 tasklet_schedule(&p_ch->tasklet);
905 }
906 else {
907 CLAW_DBF_TEXT(4,trace,"RdBHAct");
908 }
909
910 #ifdef DEBUGMSG
911 printk(KERN_INFO "%s: process CLAW_START_READ exit\n",
912 dev->name);
913 #endif
914 #ifdef FUNCTRACE
915 printk(KERN_INFO "%s:%s Exit on line %d\n",
916 dev->name,__FUNCTION__,__LINE__);
917 #endif
918 CLAW_DBF_TEXT(4,trace,"RdIRQXit");
919 return;
920 case CLAW_START_WRITE:
921 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_CHECK) {
922 printk(KERN_INFO "%s: Unit Check Occured in "
923 "write channel\n",dev->name);
924 clear_bit(0, (void *)&p_ch->IO_active);
925 if (p_ch->irb->ecw[0] & 0x80 ) {
926 printk(KERN_INFO "%s: Resetting Event "
927 "occurred:\n",dev->name);
928 init_timer(&p_ch->timer);
929 p_ch->timer.function =
930 (void *)claw_write_retry;
931 p_ch->timer.data = (unsigned long)p_ch;
932 p_ch->timer.expires = jiffies + 10*HZ;
933 add_timer(&p_ch->timer);
934 printk(KERN_INFO "%s: write connection "
935 "restarting\n",dev->name);
936 }
937 #ifdef FUNCTRACE
938 printk(KERN_INFO "%s:%s Exit on line %d\n",
939 dev->name,__FUNCTION__,__LINE__);
940 #endif
941 CLAW_DBF_TEXT(4,trace,"rstrtwrt");
942 return;
943 }
944 if (p_ch->irb->scsw.dstat & DEV_STAT_UNIT_EXCEP) {
945 clear_bit(0, (void *)&p_ch->IO_active);
946 printk(KERN_INFO "%s: Unit Exception "
947 "Occured in write channel\n",
948 dev->name);
949 }
950 if(!((p_ch->irb->scsw.stctl & SCSW_STCTL_SEC_STATUS) ||
951 (p_ch->irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) ||
952 (p_ch->irb->scsw.stctl ==
953 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
954 #ifdef FUNCTRACE
955 printk(KERN_INFO "%s:%s Exit on line %d\n",
956 dev->name,__FUNCTION__,__LINE__);
957 #endif
958 CLAW_DBF_TEXT(4,trace,"writeUE");
959 return;
960 }
961 clear_bit(0, (void *)&p_ch->IO_active);
962 if (claw_test_and_setbit_busy(TB_TX,dev)==0) {
963 claw_write_next(p_ch);
964 claw_clearbit_busy(TB_TX,dev);
965 claw_clear_busy(dev);
966 }
967 p_ch_r=(struct chbk *)&privptr->channel[READ];
968 if (test_and_set_bit(CLAW_BH_ACTIVE,
969 (void *)&p_ch_r->flag_a) == 0) {
970 tasklet_schedule(&p_ch_r->tasklet);
971 }
972
973 #ifdef DEBUGMSG
974 printk(KERN_INFO "%s: process CLAW_START_WRITE exit\n",
975 dev->name);
976 #endif
977 #ifdef FUNCTRACE
978 printk(KERN_INFO "%s:%s Exit on line %d\n",
979 dev->name,__FUNCTION__,__LINE__);
980 #endif
981 CLAW_DBF_TEXT(4,trace,"StWtExit");
982 return;
983 default:
984 printk(KERN_WARNING "%s: wrong selection code - irq "
985 "state=%d\n",dev->name,p_ch->claw_state);
986 #ifdef FUNCTRACE
987 printk(KERN_INFO "%s:%s Exit on line %d\n",
988 dev->name,__FUNCTION__,__LINE__);
989 #endif
990 CLAW_DBF_TEXT(2,trace,"badIRQ");
991 return;
992 }
993
994 } /* end of claw_irq_handler */
995
996
997 /*-------------------------------------------------------------------*
998 * claw_irq_tasklet *
999 * *
1000 *--------------------------------------------------------------------*/
1001 static void
1002 claw_irq_tasklet ( unsigned long data )
1003 {
1004 struct chbk * p_ch;
1005 struct net_device *dev;
1006 struct claw_privbk * privptr;
1007
1008 p_ch = (struct chbk *) data;
1009 dev = (struct net_device *)p_ch->ndev;
1010 #ifdef FUNCTRACE
1011 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1012 #endif
1013 #ifdef DEBUGMSG
1014 printk(KERN_INFO "%s: variable p_ch =\n",dev->name);
1015 dumpit((char *) p_ch, sizeof(struct chbk));
1016 #endif
1017 CLAW_DBF_TEXT(4,trace,"IRQtask");
1018
1019 privptr = (struct claw_privbk *) dev->priv;
1020
1021 #ifdef DEBUGMSG
1022 printk(KERN_INFO "%s: bh routine - state-%02x\n" ,
1023 dev->name, p_ch->claw_state);
1024 #endif
1025
1026 unpack_read(dev);
1027 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
1028 CLAW_DBF_TEXT(4,trace,"TskletXt");
1029 #ifdef FUNCTRACE
1030 printk(KERN_INFO "%s:%s Exit on line %d\n",
1031 dev->name,__FUNCTION__,__LINE__);
1032 #endif
1033 return;
1034 } /* end of claw_irq_bh */
1035
1036 /*-------------------------------------------------------------------*
1037 * claw_release *
1038 * *
1039 *--------------------------------------------------------------------*/
1040 static int
1041 claw_release(struct net_device *dev)
1042 {
1043 int rc;
1044 int i;
1045 unsigned long saveflags;
1046 unsigned long parm;
1047 struct claw_privbk *privptr;
1048 DECLARE_WAITQUEUE(wait, current);
1049 struct ccwbk* p_this_ccw;
1050 struct ccwbk* p_buf;
1051
1052 if (!dev)
1053 return 0;
1054 privptr = (struct claw_privbk *) dev->priv;
1055 if (!privptr)
1056 return 0;
1057 #ifdef FUNCTRACE
1058 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1059 #endif
1060 CLAW_DBF_TEXT(4,trace,"release");
1061 #ifdef DEBUGMSG
1062 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1063 dumpit((char *) dev, sizeof(struct net_device));
1064 printk(KERN_INFO "Priv Buffalloc %d\n",privptr->buffs_alloc);
1065 printk(KERN_INFO "Priv p_buff_ccw = %p\n",&privptr->p_buff_ccw);
1066 #endif
1067 privptr->release_pend=1;
1068 claw_setbit_busy(TB_STOP,dev);
1069 for ( i = 1; i >=0 ; i--) {
1070 spin_lock_irqsave(
1071 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1072 /* del_timer(&privptr->channel[READ].timer); */
1073 privptr->channel[i].claw_state = CLAW_STOP;
1074 privptr->channel[i].IO_active = 0;
1075 parm = (unsigned long) &privptr->channel[i];
1076 if (i == WRITE)
1077 claw_purge_skb_queue(
1078 &privptr->channel[WRITE].collect_queue);
1079 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
1080 if (privptr->system_validate_comp==0x00) /* never opened? */
1081 init_waitqueue_head(&privptr->channel[i].wait);
1082 add_wait_queue(&privptr->channel[i].wait, &wait);
1083 set_current_state(TASK_INTERRUPTIBLE);
1084 spin_unlock_irqrestore(
1085 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
1086 schedule();
1087 set_current_state(TASK_RUNNING);
1088 remove_wait_queue(&privptr->channel[i].wait, &wait);
1089 if (rc != 0) {
1090 ccw_check_return_code(privptr->channel[i].cdev, rc);
1091 }
1092 }
1093 if (privptr->pk_skb != NULL) {
1094 dev_kfree_skb_any(privptr->pk_skb);
1095 privptr->pk_skb = NULL;
1096 }
1097 if(privptr->buffs_alloc != 1) {
1098 #ifdef FUNCTRACE
1099 printk(KERN_INFO "%s:%s Exit on line %d\n",
1100 dev->name,__FUNCTION__,__LINE__);
1101 #endif
1102 CLAW_DBF_TEXT(4,trace,"none2fre");
1103 return 0;
1104 }
1105 CLAW_DBF_TEXT(4,trace,"freebufs");
1106 if (privptr->p_buff_ccw != NULL) {
1107 free_pages((unsigned long)privptr->p_buff_ccw,
1108 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
1109 }
1110 CLAW_DBF_TEXT(4,trace,"freeread");
1111 if (privptr->p_env->read_size < PAGE_SIZE) {
1112 if (privptr->p_buff_read != NULL) {
1113 free_pages((unsigned long)privptr->p_buff_read,
1114 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
1115 }
1116 }
1117 else {
1118 p_buf=privptr->p_read_active_first;
1119 while (p_buf!=NULL) {
1120 free_pages((unsigned long)p_buf->p_buffer,
1121 (int)pages_to_order_of_mag(
1122 privptr->p_buff_pages_perread ));
1123 p_buf=p_buf->next;
1124 }
1125 }
1126 CLAW_DBF_TEXT(4,trace,"freewrit");
1127 if (privptr->p_env->write_size < PAGE_SIZE ) {
1128 free_pages((unsigned long)privptr->p_buff_write,
1129 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
1130 }
1131 else {
1132 p_buf=privptr->p_write_active_first;
1133 while (p_buf!=NULL) {
1134 free_pages((unsigned long)p_buf->p_buffer,
1135 (int)pages_to_order_of_mag(
1136 privptr->p_buff_pages_perwrite ));
1137 p_buf=p_buf->next;
1138 }
1139 }
1140 CLAW_DBF_TEXT(4,trace,"clearptr");
1141 privptr->buffs_alloc = 0;
1142 privptr->p_buff_ccw=NULL;
1143 privptr->p_buff_read=NULL;
1144 privptr->p_buff_write=NULL;
1145 privptr->system_validate_comp=0;
1146 privptr->release_pend=0;
1147 /* Remove any writes that were pending and reset all reads */
1148 p_this_ccw=privptr->p_read_active_first;
1149 while (p_this_ccw!=NULL) {
1150 p_this_ccw->header.length=0xffff;
1151 p_this_ccw->header.opcode=0xff;
1152 p_this_ccw->header.flag=0x00;
1153 p_this_ccw=p_this_ccw->next;
1154 }
1155
1156 while (privptr->p_write_active_first!=NULL) {
1157 p_this_ccw=privptr->p_write_active_first;
1158 p_this_ccw->header.flag=CLAW_PENDING;
1159 privptr->p_write_active_first=p_this_ccw->next;
1160 p_this_ccw->next=privptr->p_write_free_chain;
1161 privptr->p_write_free_chain=p_this_ccw;
1162 ++privptr->write_free_count;
1163 }
1164 privptr->p_write_active_last=NULL;
1165 privptr->mtc_logical_link = -1;
1166 privptr->mtc_skipping = 1;
1167 privptr->mtc_offset=0;
1168
1169 if (((privptr->channel[READ].last_dstat |
1170 privptr->channel[WRITE].last_dstat) &
1171 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
1172 printk(KERN_WARNING "%s: channel problems during close - "
1173 "read: %02x - write: %02x\n",
1174 dev->name,
1175 privptr->channel[READ].last_dstat,
1176 privptr->channel[WRITE].last_dstat);
1177 CLAW_DBF_TEXT(2,trace,"badclose");
1178 }
1179 #ifdef FUNCTRACE
1180 printk(KERN_INFO "%s:%s Exit on line %d\n",
1181 dev->name,__FUNCTION__,__LINE__);
1182 #endif
1183 CLAW_DBF_TEXT(4,trace,"rlsexit");
1184 return 0;
1185 } /* end of claw_release */
1186
1187
1188
1189 /*-------------------------------------------------------------------*
1190 * claw_write_retry *
1191 * *
1192 *--------------------------------------------------------------------*/
1193
1194 static void
1195 claw_write_retry ( struct chbk *p_ch )
1196 {
1197
1198 struct net_device *dev=p_ch->ndev;
1199
1200
1201 #ifdef FUNCTRACE
1202 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
1203 printk(KERN_INFO "claw: variable p_ch =\n");
1204 dumpit((char *) p_ch, sizeof(struct chbk));
1205 #endif
1206 CLAW_DBF_TEXT(4,trace,"w_retry");
1207 if (p_ch->claw_state == CLAW_STOP) {
1208 #ifdef FUNCTRACE
1209 printk(KERN_INFO "%s:%s Exit on line %d\n",
1210 dev->name,__FUNCTION__,__LINE__);
1211 #endif
1212 return;
1213 }
1214 #ifdef DEBUGMSG
1215 printk( KERN_INFO "%s:%s state-%02x\n" ,
1216 dev->name,
1217 __FUNCTION__,
1218 p_ch->claw_state);
1219 #endif
1220 claw_strt_out_IO( dev );
1221 #ifdef FUNCTRACE
1222 printk(KERN_INFO "%s:%s Exit on line %d\n",
1223 dev->name,__FUNCTION__,__LINE__);
1224 #endif
1225 CLAW_DBF_TEXT(4,trace,"rtry_xit");
1226 return;
1227 } /* end of claw_write_retry */
1228
1229
1230 /*-------------------------------------------------------------------*
1231 * claw_write_next *
1232 * *
1233 *--------------------------------------------------------------------*/
1234
1235 static void
1236 claw_write_next ( struct chbk * p_ch )
1237 {
1238
1239 struct net_device *dev;
1240 struct claw_privbk *privptr=NULL;
1241 struct sk_buff *pk_skb;
1242 int rc;
1243
1244 #ifdef FUNCTRACE
1245 printk(KERN_INFO "%s:%s Enter \n",p_ch->ndev->name,__FUNCTION__);
1246 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1247 dumpit((char *) p_ch, sizeof(struct chbk));
1248 #endif
1249 CLAW_DBF_TEXT(4,trace,"claw_wrt");
1250 if (p_ch->claw_state == CLAW_STOP)
1251 return;
1252 dev = (struct net_device *) p_ch->ndev;
1253 privptr = (struct claw_privbk *) dev->priv;
1254 claw_free_wrt_buf( dev );
1255 if ((privptr->write_free_count > 0) &&
1256 !skb_queue_empty(&p_ch->collect_queue)) {
1257 pk_skb = claw_pack_skb(privptr);
1258 while (pk_skb != NULL) {
1259 rc = claw_hw_tx( pk_skb, dev,1);
1260 if (privptr->write_free_count > 0) {
1261 pk_skb = claw_pack_skb(privptr);
1262 } else
1263 pk_skb = NULL;
1264 }
1265 }
1266 if (privptr->p_write_active_first!=NULL) {
1267 claw_strt_out_IO(dev);
1268 }
1269
1270 #ifdef FUNCTRACE
1271 printk(KERN_INFO "%s:%s Exit on line %d\n",
1272 dev->name,__FUNCTION__,__LINE__);
1273 #endif
1274 return;
1275 } /* end of claw_write_next */
1276
1277 /*-------------------------------------------------------------------*
1278 * *
1279 * claw_timer *
1280 *--------------------------------------------------------------------*/
1281
1282 static void
1283 claw_timer ( struct chbk * p_ch )
1284 {
1285 #ifdef FUNCTRACE
1286 printk(KERN_INFO "%s:%s Entry\n",p_ch->ndev->name,__FUNCTION__);
1287 printk(KERN_INFO "%s: variable p_ch =\n",p_ch->ndev->name);
1288 dumpit((char *) p_ch, sizeof(struct chbk));
1289 #endif
1290 CLAW_DBF_TEXT(4,trace,"timer");
1291 p_ch->flag |= CLAW_TIMER;
1292 wake_up(&p_ch->wait);
1293 #ifdef FUNCTRACE
1294 printk(KERN_INFO "%s:%s Exit on line %d\n",
1295 p_ch->ndev->name,__FUNCTION__,__LINE__);
1296 #endif
1297 return;
1298 } /* end of claw_timer */
1299
1300
1301 /*
1302 *
1303 * functions
1304 */
1305
1306
1307 /*-------------------------------------------------------------------*
1308 * *
1309 * pages_to_order_of_mag *
1310 * *
1311 * takes a number of pages from 1 to 512 and returns the *
1312 * log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1313 * of magnitude get_free_pages() has an upper order of 9 *
1314 *--------------------------------------------------------------------*/
1315
1316 static int inline
1317 pages_to_order_of_mag(int num_of_pages)
1318 {
1319 int order_of_mag=1; /* assume 2 pages */
1320 int nump=2;
1321 #ifdef FUNCTRACE
1322 printk(KERN_INFO "%s Enter pages = %d \n",__FUNCTION__,num_of_pages);
1323 #endif
1324 CLAW_DBF_TEXT_(5,trace,"pages%d",num_of_pages);
1325 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1326 /* 512 pages = 2Meg on 4k page systems */
1327 if (num_of_pages >= 512) {return 9; }
1328 /* we have two or more pages order is at least 1 */
1329 for (nump=2 ;nump <= 512;nump*=2) {
1330 if (num_of_pages <= nump)
1331 break;
1332 order_of_mag +=1;
1333 }
1334 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1335 #ifdef FUNCTRACE
1336 printk(KERN_INFO "%s Exit on line %d, order = %d\n",
1337 __FUNCTION__,__LINE__, order_of_mag);
1338 #endif
1339 CLAW_DBF_TEXT_(5,trace,"mag%d",order_of_mag);
1340 return order_of_mag;
1341 }
1342
1343 /*-------------------------------------------------------------------*
1344 * *
1345 * add_claw_reads *
1346 * *
1347 *--------------------------------------------------------------------*/
1348 static int
1349 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1350 struct ccwbk* p_last)
1351 {
1352 struct claw_privbk *privptr;
1353 struct ccw1 temp_ccw;
1354 struct endccw * p_end;
1355 #ifdef IOTRACE
1356 struct ccwbk* p_buf;
1357 #endif
1358 #ifdef FUNCTRACE
1359 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
1360 #endif
1361 #ifdef DEBUGMSG
1362 printk(KERN_INFO "dev\n");
1363 dumpit((char *) dev, sizeof(struct net_device));
1364 printk(KERN_INFO "p_first\n");
1365 dumpit((char *) p_first, sizeof(struct ccwbk));
1366 printk(KERN_INFO "p_last\n");
1367 dumpit((char *) p_last, sizeof(struct ccwbk));
1368 #endif
1369 CLAW_DBF_TEXT(4,trace,"addreads");
1370 privptr = dev->priv;
1371 p_end = privptr->p_end_ccw;
1372
1373 /* first CCW and last CCW contains a new set of read channel programs
1374 * to apend the running channel programs
1375 */
1376 if ( p_first==NULL) {
1377 #ifdef FUNCTRACE
1378 printk(KERN_INFO "%s:%s Exit on line %d\n",
1379 dev->name,__FUNCTION__,__LINE__);
1380 #endif
1381 CLAW_DBF_TEXT(4,trace,"addexit");
1382 return 0;
1383 }
1384
1385 /* set up ending CCW sequence for this segment */
1386 if (p_end->read1) {
1387 p_end->read1=0x00; /* second ending CCW is now active */
1388 /* reset ending CCWs and setup TIC CCWs */
1389 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1390 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1391 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1392 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1393 p_end->read2_nop2.cda=0;
1394 p_end->read2_nop2.count=1;
1395 }
1396 else {
1397 p_end->read1=0x01; /* first ending CCW is now active */
1398 /* reset ending CCWs and setup TIC CCWs */
1399 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1400 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1401 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1402 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1403 p_end->read1_nop2.cda=0;
1404 p_end->read1_nop2.count=1;
1405 }
1406
1407 if ( privptr-> p_read_active_first ==NULL ) {
1408 #ifdef DEBUGMSG
1409 printk(KERN_INFO "%s:%s p_read_active_frist == NULL \n",
1410 dev->name,__FUNCTION__);
1411 printk(KERN_INFO "%s:%s Read active first/last changed \n",
1412 dev->name,__FUNCTION__);
1413 #endif
1414 privptr-> p_read_active_first= p_first; /* set new first */
1415 privptr-> p_read_active_last = p_last; /* set new last */
1416 }
1417 else {
1418
1419 #ifdef DEBUGMSG
1420 printk(KERN_INFO "%s:%s Read in progress \n",
1421 dev->name,__FUNCTION__);
1422 #endif
1423 /* set up TIC ccw */
1424 temp_ccw.cda= (__u32)__pa(&p_first->read);
1425 temp_ccw.count=0;
1426 temp_ccw.flags=0;
1427 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1428
1429
1430 if (p_end->read1) {
1431
1432 /* first set of CCW's is chained to the new read */
1433 /* chain, so the second set is chained to the active chain. */
1434 /* Therefore modify the second set to point to the new */
1435 /* read chain set up TIC CCWs */
1436 /* make sure we update the CCW so channel doesn't fetch it */
1437 /* when it's only half done */
1438 memcpy( &p_end->read2_nop2, &temp_ccw ,
1439 sizeof(struct ccw1));
1440 privptr->p_read_active_last->r_TIC_1.cda=
1441 (__u32)__pa(&p_first->read);
1442 privptr->p_read_active_last->r_TIC_2.cda=
1443 (__u32)__pa(&p_first->read);
1444 }
1445 else {
1446 /* make sure we update the CCW so channel doesn't */
1447 /* fetch it when it is only half done */
1448 memcpy( &p_end->read1_nop2, &temp_ccw ,
1449 sizeof(struct ccw1));
1450 privptr->p_read_active_last->r_TIC_1.cda=
1451 (__u32)__pa(&p_first->read);
1452 privptr->p_read_active_last->r_TIC_2.cda=
1453 (__u32)__pa(&p_first->read);
1454 }
1455 /* chain in new set of blocks */
1456 privptr->p_read_active_last->next = p_first;
1457 privptr->p_read_active_last=p_last;
1458 } /* end of if ( privptr-> p_read_active_first ==NULL) */
1459 #ifdef IOTRACE
1460 printk(KERN_INFO "%s:%s dump p_last CCW BK \n",dev->name,__FUNCTION__);
1461 dumpit((char *)p_last, sizeof(struct ccwbk));
1462 printk(KERN_INFO "%s:%s dump p_end CCW BK \n",dev->name,__FUNCTION__);
1463 dumpit((char *)p_end, sizeof(struct endccw));
1464
1465 printk(KERN_INFO "%s:%s dump p_first CCW BK \n",dev->name,__FUNCTION__);
1466 dumpit((char *)p_first, sizeof(struct ccwbk));
1467 printk(KERN_INFO "%s:%s Dump Active CCW chain \n",
1468 dev->name,__FUNCTION__);
1469 p_buf=privptr->p_read_active_first;
1470 while (p_buf!=NULL) {
1471 dumpit((char *)p_buf, sizeof(struct ccwbk));
1472 p_buf=p_buf->next;
1473 }
1474 #endif
1475 #ifdef FUNCTRACE
1476 printk(KERN_INFO "%s:%s Exit on line %d\n",
1477 dev->name,__FUNCTION__,__LINE__);
1478 #endif
1479 CLAW_DBF_TEXT(4,trace,"addexit");
1480 return 0;
1481 } /* end of add_claw_reads */
1482
1483 /*-------------------------------------------------------------------*
1484 * ccw_check_return_code *
1485 * *
1486 *-------------------------------------------------------------------*/
1487
1488 static void inline
1489 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1490 {
1491 #ifdef FUNCTRACE
1492 printk(KERN_INFO "%s: %s() > enter \n",
1493 cdev->dev.bus_id,__FUNCTION__);
1494 #endif
1495 CLAW_DBF_TEXT(4,trace,"ccwret");
1496 #ifdef DEBUGMSG
1497 printk(KERN_INFO "variable cdev =\n");
1498 dumpit((char *) cdev, sizeof(struct ccw_device));
1499 printk(KERN_INFO "variable return_code = %d\n",return_code);
1500 #endif
1501 if (return_code != 0) {
1502 switch (return_code) {
1503 case -EBUSY:
1504 printk(KERN_INFO "%s: Busy !\n",
1505 cdev->dev.bus_id);
1506 break;
1507 case -ENODEV:
1508 printk(KERN_EMERG "%s: Missing device called "
1509 "for IO ENODEV\n", cdev->dev.bus_id);
1510 break;
1511 case -EIO:
1512 printk(KERN_EMERG "%s: Status pending... EIO \n",
1513 cdev->dev.bus_id);
1514 break;
1515 case -EINVAL:
1516 printk(KERN_EMERG "%s: Invalid Dev State EINVAL \n",
1517 cdev->dev.bus_id);
1518 break;
1519 default:
1520 printk(KERN_EMERG "%s: Unknown error in "
1521 "Do_IO %d\n",cdev->dev.bus_id, return_code);
1522 }
1523 }
1524 #ifdef FUNCTRACE
1525 printk(KERN_INFO "%s: %s() > exit on line %d\n",
1526 cdev->dev.bus_id,__FUNCTION__,__LINE__);
1527 #endif
1528 CLAW_DBF_TEXT(4,trace,"ccwret");
1529 } /* end of ccw_check_return_code */
1530
1531 /*-------------------------------------------------------------------*
1532 * ccw_check_unit_check *
1533 *--------------------------------------------------------------------*/
1534
1535 static void inline
1536 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1537 {
1538 struct net_device *dev = p_ch->ndev;
1539
1540 #ifdef FUNCTRACE
1541 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1542 #endif
1543 #ifdef DEBUGMSG
1544 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1545 dumpit((char *)dev, sizeof(struct net_device));
1546 printk(KERN_INFO "%s: variable sense =\n",dev->name);
1547 dumpit((char *)&sense, 2);
1548 #endif
1549 CLAW_DBF_TEXT(4,trace,"unitchek");
1550
1551 printk(KERN_INFO "%s: Unit Check with sense byte:0x%04x\n",
1552 dev->name, sense);
1553
1554 if (sense & 0x40) {
1555 if (sense & 0x01) {
1556 printk(KERN_WARNING "%s: Interface disconnect or "
1557 "Selective reset "
1558 "occurred (remote side)\n", dev->name);
1559 }
1560 else {
1561 printk(KERN_WARNING "%s: System reset occured"
1562 " (remote side)\n", dev->name);
1563 }
1564 }
1565 else if (sense & 0x20) {
1566 if (sense & 0x04) {
1567 printk(KERN_WARNING "%s: Data-streaming "
1568 "timeout)\n", dev->name);
1569 }
1570 else {
1571 printk(KERN_WARNING "%s: Data-transfer parity"
1572 " error\n", dev->name);
1573 }
1574 }
1575 else if (sense & 0x10) {
1576 if (sense & 0x20) {
1577 printk(KERN_WARNING "%s: Hardware malfunction "
1578 "(remote side)\n", dev->name);
1579 }
1580 else {
1581 printk(KERN_WARNING "%s: read-data parity error "
1582 "(remote side)\n", dev->name);
1583 }
1584 }
1585
1586 #ifdef FUNCTRACE
1587 printk(KERN_INFO "%s: %s() exit on line %d\n",
1588 dev->name,__FUNCTION__,__LINE__);
1589 #endif
1590 } /* end of ccw_check_unit_check */
1591
1592
1593
1594 /*-------------------------------------------------------------------*
1595 * Dump buffer format *
1596 * *
1597 *--------------------------------------------------------------------*/
1598 #ifdef DEBUG
1599 static void
1600 dumpit(char* buf, int len)
1601 {
1602
1603 __u32 ct, sw, rm, dup;
1604 char *ptr, *rptr;
1605 char tbuf[82], tdup[82];
1606 #if (CONFIG_ARCH_S390X)
1607 char addr[22];
1608 #else
1609 char addr[12];
1610 #endif
1611 char boff[12];
1612 char bhex[82], duphex[82];
1613 char basc[40];
1614
1615 sw = 0;
1616 rptr =ptr=buf;
1617 rm = 16;
1618 duphex[0] = 0x00;
1619 dup = 0;
1620 for ( ct=0; ct < len; ct++, ptr++, rptr++ ) {
1621 if (sw == 0) {
1622 #if (CONFIG_ARCH_S390X)
1623 sprintf(addr, "%16.16lX",(unsigned long)rptr);
1624 #else
1625 sprintf(addr, "%8.8X",(__u32)rptr);
1626 #endif
1627 sprintf(boff, "%4.4X", (__u32)ct);
1628 bhex[0] = '\0';
1629 basc[0] = '\0';
1630 }
1631 if ((sw == 4) || (sw == 12)) {
1632 strcat(bhex, " ");
1633 }
1634 if (sw == 8) {
1635 strcat(bhex, " ");
1636 }
1637 #if (CONFIG_ARCH_S390X)
1638 sprintf(tbuf,"%2.2lX", (unsigned long)*ptr);
1639 #else
1640 sprintf(tbuf,"%2.2X", (__u32)*ptr);
1641 #endif
1642 tbuf[2] = '\0';
1643 strcat(bhex, tbuf);
1644 if ((0!=isprint(*ptr)) && (*ptr >= 0x20)) {
1645 basc[sw] = *ptr;
1646 }
1647 else {
1648 basc[sw] = '.';
1649 }
1650 basc[sw+1] = '\0';
1651 sw++;
1652 rm--;
1653 if (sw==16) {
1654 if ((strcmp(duphex, bhex)) !=0) {
1655 if (dup !=0) {
1656 sprintf(tdup,"Duplicate as above to"
1657 " %s", addr);
1658 printk( KERN_INFO " "
1659 " --- %s ---\n",tdup);
1660 }
1661 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1662 addr, boff, bhex, basc);
1663 dup = 0;
1664 strcpy(duphex, bhex);
1665 }
1666 else {
1667 dup++;
1668 }
1669 sw = 0;
1670 rm = 16;
1671 }
1672 } /* endfor */
1673
1674 if (sw != 0) {
1675 for ( ; rm > 0; rm--, sw++ ) {
1676 if ((sw==4) || (sw==12)) strcat(bhex, " ");
1677 if (sw==8) strcat(bhex, " ");
1678 strcat(bhex, " ");
1679 strcat(basc, " ");
1680 }
1681 if (dup !=0) {
1682 sprintf(tdup,"Duplicate as above to %s", addr);
1683 printk( KERN_INFO " --- %s ---\n",
1684 tdup);
1685 }
1686 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1687 addr, boff, bhex, basc);
1688 }
1689 else {
1690 if (dup >=1) {
1691 sprintf(tdup,"Duplicate as above to %s", addr);
1692 printk( KERN_INFO " --- %s ---\n",
1693 tdup);
1694 }
1695 if (dup !=0) {
1696 printk( KERN_INFO " %s (+%s) : %s [%s]\n",
1697 addr, boff, bhex, basc);
1698 }
1699 }
1700 return;
1701
1702 } /* end of dumpit */
1703 #endif
1704
1705 /*-------------------------------------------------------------------*
1706 * find_link *
1707 *--------------------------------------------------------------------*/
1708 static int
1709 find_link(struct net_device *dev, char *host_name, char *ws_name )
1710 {
1711 struct claw_privbk *privptr;
1712 struct claw_env *p_env;
1713 int rc=0;
1714
1715 #ifdef FUNCTRACE
1716 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
1717 #endif
1718 CLAW_DBF_TEXT(2,setup,"findlink");
1719 #ifdef DEBUGMSG
1720 printk(KERN_INFO "%s: variable dev = \n",dev->name);
1721 dumpit((char *) dev, sizeof(struct net_device));
1722 printk(KERN_INFO "%s: variable host_name = %s\n",dev->name, host_name);
1723 printk(KERN_INFO "%s: variable ws_name = %s\n",dev->name, ws_name);
1724 #endif
1725 privptr=dev->priv;
1726 p_env=privptr->p_env;
1727 switch (p_env->packing)
1728 {
1729 case PACKING_ASK:
1730 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1731 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1732 rc = EINVAL;
1733 break;
1734 case DO_PACKED:
1735 case PACK_SEND:
1736 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1737 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1738 rc = EINVAL;
1739 break;
1740 default:
1741 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1742 (memcmp(p_env->api_type , ws_name, 8)!=0))
1743 rc = EINVAL;
1744 break;
1745 }
1746
1747 #ifdef FUNCTRACE
1748 printk(KERN_INFO "%s:%s Exit on line %d\n",
1749 dev->name,__FUNCTION__,__LINE__);
1750 #endif
1751 return 0;
1752 } /* end of find_link */
1753
1754 /*-------------------------------------------------------------------*
1755 * claw_hw_tx *
1756 * *
1757 * *
1758 *-------------------------------------------------------------------*/
1759
1760 static int
1761 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1762 {
1763 int rc=0;
1764 struct claw_privbk *privptr;
1765 struct ccwbk *p_this_ccw;
1766 struct ccwbk *p_first_ccw;
1767 struct ccwbk *p_last_ccw;
1768 __u32 numBuffers;
1769 signed long len_of_data;
1770 unsigned long bytesInThisBuffer;
1771 unsigned char *pDataAddress;
1772 struct endccw *pEnd;
1773 struct ccw1 tempCCW;
1774 struct chbk *p_ch;
1775 struct claw_env *p_env;
1776 int lock;
1777 struct clawph *pk_head;
1778 struct chbk *ch;
1779 #ifdef IOTRACE
1780 struct ccwbk *p_buf;
1781 #endif
1782 #ifdef FUNCTRACE
1783 printk(KERN_INFO "%s: %s() > enter\n",dev->name,__FUNCTION__);
1784 #endif
1785 CLAW_DBF_TEXT(4,trace,"hw_tx");
1786 #ifdef DEBUGMSG
1787 printk(KERN_INFO "%s: variable dev skb =\n",dev->name);
1788 dumpit((char *) skb, sizeof(struct sk_buff));
1789 printk(KERN_INFO "%s: variable dev =\n",dev->name);
1790 dumpit((char *) dev, sizeof(struct net_device));
1791 printk(KERN_INFO "%s: variable linkid = %ld\n",dev->name,linkid);
1792 #endif
1793 privptr = (struct claw_privbk *) (dev->priv);
1794 p_ch=(struct chbk *)&privptr->channel[WRITE];
1795 p_env =privptr->p_env;
1796 #ifdef IOTRACE
1797 printk(KERN_INFO "%s: %s() dump sk_buff \n",dev->name,__FUNCTION__);
1798 dumpit((char *)skb ,sizeof(struct sk_buff));
1799 #endif
1800 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1801 /* scan the write queue to free any completed write packets */
1802 p_first_ccw=NULL;
1803 p_last_ccw=NULL;
1804 if ((p_env->packing >= PACK_SEND) &&
1805 (skb->cb[1] != 'P')) {
1806 skb_push(skb,sizeof(struct clawph));
1807 pk_head=(struct clawph *)skb->data;
1808 pk_head->len=skb->len-sizeof(struct clawph);
1809 if (pk_head->len%4) {
1810 pk_head->len+= 4-(pk_head->len%4);
1811 skb_pad(skb,4-(pk_head->len%4));
1812 skb_put(skb,4-(pk_head->len%4));
1813 }
1814 if (p_env->packing == DO_PACKED)
1815 pk_head->link_num = linkid;
1816 else
1817 pk_head->link_num = 0;
1818 pk_head->flag = 0x00;
1819 skb_pad(skb,4);
1820 skb->cb[1] = 'P';
1821 }
1822 if (linkid == 0) {
1823 if (claw_check_busy(dev)) {
1824 if (privptr->write_free_count!=0) {
1825 claw_clear_busy(dev);
1826 }
1827 else {
1828 claw_strt_out_IO(dev );
1829 claw_free_wrt_buf( dev );
1830 if (privptr->write_free_count==0) {
1831 #ifdef IOTRACE
1832 printk(KERN_INFO "%s: "
1833 "(claw_check_busy) no free write "
1834 "buffers\n", dev->name);
1835 #endif
1836 ch = &privptr->channel[WRITE];
1837 atomic_inc(&skb->users);
1838 skb_queue_tail(&ch->collect_queue, skb);
1839 goto Done;
1840 }
1841 else {
1842 claw_clear_busy(dev);
1843 }
1844 }
1845 }
1846 /* tx lock */
1847 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1848 #ifdef DEBUGMSG
1849 printk(KERN_INFO "%s: busy (claw_test_and_setbit_"
1850 "busy)\n", dev->name);
1851 #endif
1852 ch = &privptr->channel[WRITE];
1853 atomic_inc(&skb->users);
1854 skb_queue_tail(&ch->collect_queue, skb);
1855 claw_strt_out_IO(dev );
1856 rc=-EBUSY;
1857 goto Done2;
1858 }
1859 }
1860 /* See how many write buffers are required to hold this data */
1861 numBuffers= ( skb->len + privptr->p_env->write_size - 1) /
1862 ( privptr->p_env->write_size);
1863
1864 /* If that number of buffers isn't available, give up for now */
1865 if (privptr->write_free_count < numBuffers ||
1866 privptr->p_write_free_chain == NULL ) {
1867
1868 claw_setbit_busy(TB_NOBUFFER,dev);
1869
1870 #ifdef DEBUGMSG
1871 printk(KERN_INFO "%s: busy (claw_setbit_busy"
1872 "(TB_NOBUFFER))\n", dev->name);
1873 printk(KERN_INFO " free_count: %d, numBuffers : %d\n",
1874 (int)privptr->write_free_count,(int) numBuffers );
1875 #endif
1876 ch = &privptr->channel[WRITE];
1877 atomic_inc(&skb->users);
1878 skb_queue_tail(&ch->collect_queue, skb);
1879 CLAW_DBF_TEXT(2,trace,"clawbusy");
1880 goto Done2;
1881 }
1882 pDataAddress=skb->data;
1883 len_of_data=skb->len;
1884
1885 while (len_of_data > 0) {
1886 #ifdef DEBUGMSG
1887 printk(KERN_INFO "%s: %s() length-of-data is %ld \n",
1888 dev->name ,__FUNCTION__,len_of_data);
1889 dumpit((char *)pDataAddress ,64);
1890 #endif
1891 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1892 if (p_this_ccw == NULL) { /* lost the race */
1893 ch = &privptr->channel[WRITE];
1894 atomic_inc(&skb->users);
1895 skb_queue_tail(&ch->collect_queue, skb);
1896 goto Done2;
1897 }
1898 privptr->p_write_free_chain=p_this_ccw->next;
1899 p_this_ccw->next=NULL;
1900 --privptr->write_free_count; /* -1 */
1901 bytesInThisBuffer=len_of_data;
1902 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1903 len_of_data-=bytesInThisBuffer;
1904 pDataAddress+=(unsigned long)bytesInThisBuffer;
1905 /* setup write CCW */
1906 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1907 if (len_of_data>0) {
1908 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1909 }
1910 p_this_ccw->write.count=bytesInThisBuffer;
1911 /* now add to end of this chain */
1912 if (p_first_ccw==NULL) {
1913 p_first_ccw=p_this_ccw;
1914 }
1915 if (p_last_ccw!=NULL) {
1916 p_last_ccw->next=p_this_ccw;
1917 /* set up TIC ccws */
1918 p_last_ccw->w_TIC_1.cda=
1919 (__u32)__pa(&p_this_ccw->write);
1920 }
1921 p_last_ccw=p_this_ccw; /* save new last block */
1922 #ifdef IOTRACE
1923 printk(KERN_INFO "%s: %s() > CCW and Buffer %ld bytes long \n",
1924 dev->name,__FUNCTION__,bytesInThisBuffer);
1925 dumpit((char *)p_this_ccw, sizeof(struct ccwbk));
1926 dumpit((char *)p_this_ccw->p_buffer, 64);
1927 #endif
1928 }
1929
1930 /* FirstCCW and LastCCW now contain a new set of write channel
1931 * programs to append to the running channel program
1932 */
1933
1934 if (p_first_ccw!=NULL) {
1935 /* setup ending ccw sequence for this segment */
1936 pEnd=privptr->p_end_ccw;
1937 if (pEnd->write1) {
1938 pEnd->write1=0x00; /* second end ccw is now active */
1939 /* set up Tic CCWs */
1940 p_last_ccw->w_TIC_1.cda=
1941 (__u32)__pa(&pEnd->write2_nop1);
1942 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1943 pEnd->write2_nop2.flags =
1944 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1945 pEnd->write2_nop2.cda=0;
1946 pEnd->write2_nop2.count=1;
1947 }
1948 else { /* end of if (pEnd->write1)*/
1949 pEnd->write1=0x01; /* first end ccw is now active */
1950 /* set up Tic CCWs */
1951 p_last_ccw->w_TIC_1.cda=
1952 (__u32)__pa(&pEnd->write1_nop1);
1953 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1954 pEnd->write1_nop2.flags =
1955 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1956 pEnd->write1_nop2.cda=0;
1957 pEnd->write1_nop2.count=1;
1958 } /* end if if (pEnd->write1) */
1959
1960
1961 if (privptr->p_write_active_first==NULL ) {
1962 privptr->p_write_active_first=p_first_ccw;
1963 privptr->p_write_active_last=p_last_ccw;
1964 }
1965 else {
1966
1967 /* set up Tic CCWs */
1968
1969 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1970 tempCCW.count=0;
1971 tempCCW.flags=0;
1972 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1973
1974 if (pEnd->write1) {
1975
1976 /*
1977 * first set of ending CCW's is chained to the new write
1978 * chain, so the second set is chained to the active chain
1979 * Therefore modify the second set to point the new write chain.
1980 * make sure we update the CCW atomically
1981 * so channel does not fetch it when it's only half done
1982 */
1983 memcpy( &pEnd->write2_nop2, &tempCCW ,
1984 sizeof(struct ccw1));
1985 privptr->p_write_active_last->w_TIC_1.cda=
1986 (__u32)__pa(&p_first_ccw->write);
1987 }
1988 else {
1989
1990 /*make sure we update the CCW atomically
1991 *so channel does not fetch it when it's only half done
1992 */
1993 memcpy(&pEnd->write1_nop2, &tempCCW ,
1994 sizeof(struct ccw1));
1995 privptr->p_write_active_last->w_TIC_1.cda=
1996 (__u32)__pa(&p_first_ccw->write);
1997
1998 } /* end if if (pEnd->write1) */
1999
2000 privptr->p_write_active_last->next=p_first_ccw;
2001 privptr->p_write_active_last=p_last_ccw;
2002 }
2003
2004 } /* endif (p_first_ccw!=NULL) */
2005
2006
2007 #ifdef IOTRACE
2008 printk(KERN_INFO "%s: %s() > Dump Active CCW chain \n",
2009 dev->name,__FUNCTION__);
2010 p_buf=privptr->p_write_active_first;
2011 while (p_buf!=NULL) {
2012 dumpit((char *)p_buf, sizeof(struct ccwbk));
2013 p_buf=p_buf->next;
2014 }
2015 p_buf=(struct ccwbk*)privptr->p_end_ccw;
2016 dumpit((char *)p_buf, sizeof(struct endccw));
2017 #endif
2018 dev_kfree_skb_any(skb);
2019 if (linkid==0) {
2020 lock=LOCK_NO;
2021 }
2022 else {
2023 lock=LOCK_YES;
2024 }
2025 claw_strt_out_IO(dev );
2026 /* if write free count is zero , set NOBUFFER */
2027 #ifdef DEBUGMSG
2028 printk(KERN_INFO "%s: %s() > free_count is %d\n",
2029 dev->name,__FUNCTION__,
2030 (int) privptr->write_free_count );
2031 #endif
2032 if (privptr->write_free_count==0) {
2033 claw_setbit_busy(TB_NOBUFFER,dev);
2034 }
2035 Done2:
2036 claw_clearbit_busy(TB_TX,dev);
2037 Done:
2038 #ifdef FUNCTRACE
2039 printk(KERN_INFO "%s: %s() > exit on line %d, rc = %d \n",
2040 dev->name,__FUNCTION__,__LINE__, rc);
2041 #endif
2042 return(rc);
2043 } /* end of claw_hw_tx */
2044
2045 /*-------------------------------------------------------------------*
2046 * *
2047 * init_ccw_bk *
2048 * *
2049 *--------------------------------------------------------------------*/
2050
2051 static int
2052 init_ccw_bk(struct net_device *dev)
2053 {
2054
2055 __u32 ccw_blocks_required;
2056 __u32 ccw_blocks_perpage;
2057 __u32 ccw_pages_required;
2058 __u32 claw_reads_perpage=1;
2059 __u32 claw_read_pages;
2060 __u32 claw_writes_perpage=1;
2061 __u32 claw_write_pages;
2062 void *p_buff=NULL;
2063 struct ccwbk*p_free_chain;
2064 struct ccwbk*p_buf;
2065 struct ccwbk*p_last_CCWB;
2066 struct ccwbk*p_first_CCWB;
2067 struct endccw *p_endccw=NULL;
2068 addr_t real_address;
2069 struct claw_privbk *privptr=dev->priv;
2070 struct clawh *pClawH=NULL;
2071 addr_t real_TIC_address;
2072 int i,j;
2073 #ifdef FUNCTRACE
2074 printk(KERN_INFO "%s: %s() enter \n",dev->name,__FUNCTION__);
2075 #endif
2076 CLAW_DBF_TEXT(4,trace,"init_ccw");
2077 #ifdef DEBUGMSG
2078 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2079 dumpit((char *) dev, sizeof(struct net_device));
2080 #endif
2081
2082 /* initialize statistics field */
2083 privptr->active_link_ID=0;
2084 /* initialize ccwbk pointers */
2085 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
2086 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
2087 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
2088 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
2089 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
2090 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
2091 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
2092 privptr->buffs_alloc = 0;
2093 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
2094 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
2095 /* initialize free write ccwbk counter */
2096 privptr->write_free_count=0; /* number of free bufs on write chain */
2097 p_last_CCWB = NULL;
2098 p_first_CCWB= NULL;
2099 /*
2100 * We need 1 CCW block for each read buffer, 1 for each
2101 * write buffer, plus 1 for ClawSignalBlock
2102 */
2103 ccw_blocks_required =
2104 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
2105 #ifdef DEBUGMSG
2106 printk(KERN_INFO "%s: %s() "
2107 "ccw_blocks_required=%d\n",
2108 dev->name,__FUNCTION__,
2109 ccw_blocks_required);
2110 printk(KERN_INFO "%s: %s() "
2111 "PAGE_SIZE=0x%x\n",
2112 dev->name,__FUNCTION__,
2113 (unsigned int)PAGE_SIZE);
2114 printk(KERN_INFO "%s: %s() > "
2115 "PAGE_MASK=0x%x\n",
2116 dev->name,__FUNCTION__,
2117 (unsigned int)PAGE_MASK);
2118 #endif
2119 /*
2120 * compute number of CCW blocks that will fit in a page
2121 */
2122 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
2123 ccw_pages_required=
2124 (ccw_blocks_required+ccw_blocks_perpage -1) /
2125 ccw_blocks_perpage;
2126
2127 #ifdef DEBUGMSG
2128 printk(KERN_INFO "%s: %s() > ccw_blocks_perpage=%d\n",
2129 dev->name,__FUNCTION__,
2130 ccw_blocks_perpage);
2131 printk(KERN_INFO "%s: %s() > ccw_pages_required=%d\n",
2132 dev->name,__FUNCTION__,
2133 ccw_pages_required);
2134 #endif
2135 /*
2136 * read and write sizes are set by 2 constants in claw.h
2137 * 4k and 32k. Unpacked values other than 4k are not going to
2138 * provide good performance. With packing buffers support 32k
2139 * buffers are used.
2140 */
2141 if (privptr->p_env->read_size < PAGE_SIZE) {
2142 claw_reads_perpage= PAGE_SIZE / privptr->p_env->read_size;
2143 claw_read_pages= (privptr->p_env->read_buffers +
2144 claw_reads_perpage -1) / claw_reads_perpage;
2145 }
2146 else { /* > or equal */
2147 privptr->p_buff_pages_perread=
2148 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2149 claw_read_pages=
2150 privptr->p_env->read_buffers * privptr->p_buff_pages_perread;
2151 }
2152 if (privptr->p_env->write_size < PAGE_SIZE) {
2153 claw_writes_perpage=
2154 PAGE_SIZE / privptr->p_env->write_size;
2155 claw_write_pages=
2156 (privptr->p_env->write_buffers + claw_writes_perpage -1) /
2157 claw_writes_perpage;
2158
2159 }
2160 else { /* > or equal */
2161 privptr->p_buff_pages_perwrite=
2162 (privptr->p_env->read_size + PAGE_SIZE - 1) / PAGE_SIZE;
2163 claw_write_pages=
2164 privptr->p_env->write_buffers * privptr->p_buff_pages_perwrite;
2165 }
2166 #ifdef DEBUGMSG
2167 if (privptr->p_env->read_size < PAGE_SIZE) {
2168 printk(KERN_INFO "%s: %s() reads_perpage=%d\n",
2169 dev->name,__FUNCTION__,
2170 claw_reads_perpage);
2171 }
2172 else {
2173 printk(KERN_INFO "%s: %s() pages_perread=%d\n",
2174 dev->name,__FUNCTION__,
2175 privptr->p_buff_pages_perread);
2176 }
2177 printk(KERN_INFO "%s: %s() read_pages=%d\n",
2178 dev->name,__FUNCTION__,
2179 claw_read_pages);
2180 if (privptr->p_env->write_size < PAGE_SIZE) {
2181 printk(KERN_INFO "%s: %s() writes_perpage=%d\n",
2182 dev->name,__FUNCTION__,
2183 claw_writes_perpage);
2184 }
2185 else {
2186 printk(KERN_INFO "%s: %s() pages_perwrite=%d\n",
2187 dev->name,__FUNCTION__,
2188 privptr->p_buff_pages_perwrite);
2189 }
2190 printk(KERN_INFO "%s: %s() write_pages=%d\n",
2191 dev->name,__FUNCTION__,
2192 claw_write_pages);
2193 #endif
2194
2195
2196 /*
2197 * allocate ccw_pages_required
2198 */
2199 if (privptr->p_buff_ccw==NULL) {
2200 privptr->p_buff_ccw=
2201 (void *)__get_free_pages(__GFP_DMA,
2202 (int)pages_to_order_of_mag(ccw_pages_required ));
2203 if (privptr->p_buff_ccw==NULL) {
2204 printk(KERN_INFO "%s: %s() "
2205 "__get_free_pages for CCWs failed : "
2206 "pages is %d\n",
2207 dev->name,__FUNCTION__,
2208 ccw_pages_required );
2209 #ifdef FUNCTRACE
2210 printk(KERN_INFO "%s: %s() > "
2211 "exit on line %d, rc = ENOMEM\n",
2212 dev->name,__FUNCTION__,
2213 __LINE__);
2214 #endif
2215 return -ENOMEM;
2216 }
2217 privptr->p_buff_ccw_num=ccw_pages_required;
2218 }
2219 memset(privptr->p_buff_ccw, 0x00,
2220 privptr->p_buff_ccw_num * PAGE_SIZE);
2221
2222 /*
2223 * obtain ending ccw block address
2224 *
2225 */
2226 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
2227 real_address = (__u32)__pa(privptr->p_end_ccw);
2228 /* Initialize ending CCW block */
2229 #ifdef DEBUGMSG
2230 printk(KERN_INFO "%s: %s() begin initialize ending CCW blocks\n",
2231 dev->name,__FUNCTION__);
2232 #endif
2233
2234 p_endccw=privptr->p_end_ccw;
2235 p_endccw->real=real_address;
2236 p_endccw->write1=0x00;
2237 p_endccw->read1=0x00;
2238
2239 /* write1_nop1 */
2240 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2241 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2242 p_endccw->write1_nop1.count = 1;
2243 p_endccw->write1_nop1.cda = 0;
2244
2245 /* write1_nop2 */
2246 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2247 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2248 p_endccw->write1_nop2.count = 1;
2249 p_endccw->write1_nop2.cda = 0;
2250
2251 /* write2_nop1 */
2252 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2253 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2254 p_endccw->write2_nop1.count = 1;
2255 p_endccw->write2_nop1.cda = 0;
2256
2257 /* write2_nop2 */
2258 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2259 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2260 p_endccw->write2_nop2.count = 1;
2261 p_endccw->write2_nop2.cda = 0;
2262
2263 /* read1_nop1 */
2264 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2265 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2266 p_endccw->read1_nop1.count = 1;
2267 p_endccw->read1_nop1.cda = 0;
2268
2269 /* read1_nop2 */
2270 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2271 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2272 p_endccw->read1_nop2.count = 1;
2273 p_endccw->read1_nop2.cda = 0;
2274
2275 /* read2_nop1 */
2276 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
2277 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2278 p_endccw->read2_nop1.count = 1;
2279 p_endccw->read2_nop1.cda = 0;
2280
2281 /* read2_nop2 */
2282 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
2283 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
2284 p_endccw->read2_nop2.count = 1;
2285 p_endccw->read2_nop2.cda = 0;
2286
2287 #ifdef IOTRACE
2288 printk(KERN_INFO "%s: %s() dump claw ending CCW BK \n",
2289 dev->name,__FUNCTION__);
2290 dumpit((char *)p_endccw, sizeof(struct endccw));
2291 #endif
2292
2293 /*
2294 * Build a chain of CCWs
2295 *
2296 */
2297
2298 #ifdef DEBUGMSG
2299 printk(KERN_INFO "%s: %s() Begin build a chain of CCW buffer \n",
2300 dev->name,__FUNCTION__);
2301 #endif
2302 p_buff=privptr->p_buff_ccw;
2303
2304 p_free_chain=NULL;
2305 for (i=0 ; i < ccw_pages_required; i++ ) {
2306 real_address = (__u32)__pa(p_buff);
2307 p_buf=p_buff;
2308 for (j=0 ; j < ccw_blocks_perpage ; j++) {
2309 p_buf->next = p_free_chain;
2310 p_free_chain = p_buf;
2311 p_buf->real=(__u32)__pa(p_buf);
2312 ++p_buf;
2313 }
2314 p_buff+=PAGE_SIZE;
2315 }
2316 #ifdef DEBUGMSG
2317 printk(KERN_INFO "%s: %s() "
2318 "End build a chain of CCW buffer \n",
2319 dev->name,__FUNCTION__);
2320 p_buf=p_free_chain;
2321 while (p_buf!=NULL) {
2322 dumpit((char *)p_buf, sizeof(struct ccwbk));
2323 p_buf=p_buf->next;
2324 }
2325 #endif
2326
2327 /*
2328 * Initialize ClawSignalBlock
2329 *
2330 */
2331 #ifdef DEBUGMSG
2332 printk(KERN_INFO "%s: %s() "
2333 "Begin initialize ClawSignalBlock \n",
2334 dev->name,__FUNCTION__);
2335 #endif
2336 if (privptr->p_claw_signal_blk==NULL) {
2337 privptr->p_claw_signal_blk=p_free_chain;
2338 p_free_chain=p_free_chain->next;
2339 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
2340 pClawH->length=0xffff;
2341 pClawH->opcode=0xff;
2342 pClawH->flag=CLAW_BUSY;
2343 }
2344 #ifdef DEBUGMSG
2345 printk(KERN_INFO "%s: %s() > End initialize "
2346 "ClawSignalBlock\n",
2347 dev->name,__FUNCTION__);
2348 dumpit((char *)privptr->p_claw_signal_blk, sizeof(struct ccwbk));
2349 #endif
2350
2351 /*
2352 * allocate write_pages_required and add to free chain
2353 */
2354 if (privptr->p_buff_write==NULL) {
2355 if (privptr->p_env->write_size < PAGE_SIZE) {
2356 privptr->p_buff_write=
2357 (void *)__get_free_pages(__GFP_DMA,
2358 (int)pages_to_order_of_mag(claw_write_pages ));
2359 if (privptr->p_buff_write==NULL) {
2360 printk(KERN_INFO "%s: %s() __get_free_pages for write"
2361 " bufs failed : get is for %d pages\n",
2362 dev->name,__FUNCTION__,claw_write_pages );
2363 free_pages((unsigned long)privptr->p_buff_ccw,
2364 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2365 privptr->p_buff_ccw=NULL;
2366 #ifdef FUNCTRACE
2367 printk(KERN_INFO "%s: %s() > exit on line %d,"
2368 "rc = ENOMEM\n",
2369 dev->name,__FUNCTION__,__LINE__);
2370 #endif
2371 return -ENOMEM;
2372 }
2373 /*
2374 * Build CLAW write free chain
2375 *
2376 */
2377
2378 memset(privptr->p_buff_write, 0x00,
2379 ccw_pages_required * PAGE_SIZE);
2380 #ifdef DEBUGMSG
2381 printk(KERN_INFO "%s: %s() Begin build claw write free "
2382 "chain \n",dev->name,__FUNCTION__);
2383 #endif
2384 privptr->p_write_free_chain=NULL;
2385
2386 p_buff=privptr->p_buff_write;
2387
2388 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
2389 p_buf = p_free_chain; /* get a CCW */
2390 p_free_chain = p_buf->next;
2391 p_buf->next =privptr->p_write_free_chain;
2392 privptr->p_write_free_chain = p_buf;
2393 p_buf-> p_buffer = (struct clawbuf *)p_buff;
2394 p_buf-> write.cda = (__u32)__pa(p_buff);
2395 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2396 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2397 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2398 p_buf-> w_read_FF.count = 1;
2399 p_buf-> w_read_FF.cda =
2400 (__u32)__pa(&p_buf-> header.flag);
2401 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2402 p_buf-> w_TIC_1.flags = 0;
2403 p_buf-> w_TIC_1.count = 0;
2404
2405 if (((unsigned long)p_buff+privptr->p_env->write_size) >=
2406 ((unsigned long)(p_buff+2*
2407 (privptr->p_env->write_size) -1) & PAGE_MASK)) {
2408 p_buff= p_buff+privptr->p_env->write_size;
2409 }
2410 }
2411 }
2412 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
2413 {
2414 privptr->p_write_free_chain=NULL;
2415 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
2416 p_buff=(void *)__get_free_pages(__GFP_DMA,
2417 (int)pages_to_order_of_mag(
2418 privptr->p_buff_pages_perwrite) );
2419 #ifdef IOTRACE
2420 printk(KERN_INFO "%s:%s __get_free_pages "
2421 "for writes buf: get for %d pages\n",
2422 dev->name,__FUNCTION__,
2423 privptr->p_buff_pages_perwrite);
2424 #endif
2425 if (p_buff==NULL) {
2426 printk(KERN_INFO "%s:%s __get_free_pages"
2427 "for writes buf failed : get is for %d pages\n",
2428 dev->name,
2429 __FUNCTION__,
2430 privptr->p_buff_pages_perwrite );
2431 free_pages((unsigned long)privptr->p_buff_ccw,
2432 (int)pages_to_order_of_mag(
2433 privptr->p_buff_ccw_num));
2434 privptr->p_buff_ccw=NULL;
2435 p_buf=privptr->p_buff_write;
2436 while (p_buf!=NULL) {
2437 free_pages((unsigned long)
2438 p_buf->p_buffer,
2439 (int)pages_to_order_of_mag(
2440 privptr->p_buff_pages_perwrite));
2441 p_buf=p_buf->next;
2442 }
2443 #ifdef FUNCTRACE
2444 printk(KERN_INFO "%s: %s exit on line %d, rc = ENOMEM\n",
2445 dev->name,
2446 __FUNCTION__,
2447 __LINE__);
2448 #endif
2449 return -ENOMEM;
2450 } /* Error on get_pages */
2451 memset(p_buff, 0x00, privptr->p_env->write_size );
2452 p_buf = p_free_chain;
2453 p_free_chain = p_buf->next;
2454 p_buf->next = privptr->p_write_free_chain;
2455 privptr->p_write_free_chain = p_buf;
2456 privptr->p_buff_write = p_buf;
2457 p_buf->p_buffer=(struct clawbuf *)p_buff;
2458 p_buf-> write.cda = (__u32)__pa(p_buff);
2459 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2460 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2461 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2462 p_buf-> w_read_FF.count = 1;
2463 p_buf-> w_read_FF.cda =
2464 (__u32)__pa(&p_buf-> header.flag);
2465 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2466 p_buf-> w_TIC_1.flags = 0;
2467 p_buf-> w_TIC_1.count = 0;
2468 } /* for all write_buffers */
2469
2470 } /* else buffers are PAGE_SIZE or bigger */
2471
2472 }
2473 privptr->p_buff_write_num=claw_write_pages;
2474 privptr->write_free_count=privptr->p_env->write_buffers;
2475
2476
2477 #ifdef DEBUGMSG
2478 printk(KERN_INFO "%s:%s End build claw write free chain \n",
2479 dev->name,__FUNCTION__);
2480 p_buf=privptr->p_write_free_chain;
2481 while (p_buf!=NULL) {
2482 dumpit((char *)p_buf, sizeof(struct ccwbk));
2483 p_buf=p_buf->next;
2484 }
2485 #endif
2486 /*
2487 * allocate read_pages_required and chain to free chain
2488 */
2489 if (privptr->p_buff_read==NULL) {
2490 if (privptr->p_env->read_size < PAGE_SIZE) {
2491 privptr->p_buff_read=
2492 (void *)__get_free_pages(__GFP_DMA,
2493 (int)pages_to_order_of_mag(claw_read_pages) );
2494 if (privptr->p_buff_read==NULL) {
2495 printk(KERN_INFO "%s: %s() "
2496 "__get_free_pages for read buf failed : "
2497 "get is for %d pages\n",
2498 dev->name,__FUNCTION__,claw_read_pages );
2499 free_pages((unsigned long)privptr->p_buff_ccw,
2500 (int)pages_to_order_of_mag(
2501 privptr->p_buff_ccw_num));
2502 /* free the write pages size is < page size */
2503 free_pages((unsigned long)privptr->p_buff_write,
2504 (int)pages_to_order_of_mag(
2505 privptr->p_buff_write_num));
2506 privptr->p_buff_ccw=NULL;
2507 privptr->p_buff_write=NULL;
2508 #ifdef FUNCTRACE
2509 printk(KERN_INFO "%s: %s() > exit on line %d, rc ="
2510 " ENOMEM\n",dev->name,__FUNCTION__,__LINE__);
2511 #endif
2512 return -ENOMEM;
2513 }
2514 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
2515 privptr->p_buff_read_num=claw_read_pages;
2516 /*
2517 * Build CLAW read free chain
2518 *
2519 */
2520 #ifdef DEBUGMSG
2521 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2522 dev->name,__FUNCTION__);
2523 #endif
2524 p_buff=privptr->p_buff_read;
2525 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2526 p_buf = p_free_chain;
2527 p_free_chain = p_buf->next;
2528
2529 if (p_last_CCWB==NULL) {
2530 p_buf->next=NULL;
2531 real_TIC_address=0;
2532 p_last_CCWB=p_buf;
2533 }
2534 else {
2535 p_buf->next=p_first_CCWB;
2536 real_TIC_address=
2537 (__u32)__pa(&p_first_CCWB -> read );
2538 }
2539
2540 p_first_CCWB=p_buf;
2541
2542 p_buf->p_buffer=(struct clawbuf *)p_buff;
2543 /* initialize read command */
2544 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2545 p_buf-> read.cda = (__u32)__pa(p_buff);
2546 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2547 p_buf-> read.count = privptr->p_env->read_size;
2548
2549 /* initialize read_h command */
2550 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2551 p_buf-> read_h.cda =
2552 (__u32)__pa(&(p_buf->header));
2553 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2554 p_buf-> read_h.count = sizeof(struct clawh);
2555
2556 /* initialize Signal command */
2557 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2558 p_buf-> signal.cda =
2559 (__u32)__pa(&(pClawH->flag));
2560 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2561 p_buf-> signal.count = 1;
2562
2563 /* initialize r_TIC_1 command */
2564 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2565 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2566 p_buf-> r_TIC_1.flags = 0;
2567 p_buf-> r_TIC_1.count = 0;
2568
2569 /* initialize r_read_FF command */
2570 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2571 p_buf-> r_read_FF.cda =
2572 (__u32)__pa(&(pClawH->flag));
2573 p_buf-> r_read_FF.flags =
2574 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2575 p_buf-> r_read_FF.count = 1;
2576
2577 /* initialize r_TIC_2 */
2578 memcpy(&p_buf->r_TIC_2,
2579 &p_buf->r_TIC_1, sizeof(struct ccw1));
2580
2581 /* initialize Header */
2582 p_buf->header.length=0xffff;
2583 p_buf->header.opcode=0xff;
2584 p_buf->header.flag=CLAW_PENDING;
2585
2586 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
2587 ((unsigned long)(p_buff+2*(privptr->p_env->read_size) -1)
2588 & PAGE_MASK) ) {
2589 p_buff= p_buff+privptr->p_env->read_size;
2590 }
2591 else {
2592 p_buff=
2593 (void *)((unsigned long)
2594 (p_buff+2*(privptr->p_env->read_size) -1)
2595 & PAGE_MASK) ;
2596 }
2597 } /* for read_buffers */
2598 } /* read_size < PAGE_SIZE */
2599 else { /* read Size >= PAGE_SIZE */
2600
2601 #ifdef DEBUGMSG
2602 printk(KERN_INFO "%s: %s() Begin build claw read free chain \n",
2603 dev->name,__FUNCTION__);
2604 #endif
2605 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
2606 p_buff = (void *)__get_free_pages(__GFP_DMA,
2607 (int)pages_to_order_of_mag(privptr->p_buff_pages_perread) );
2608 if (p_buff==NULL) {
2609 printk(KERN_INFO "%s: %s() __get_free_pages for read "
2610 "buf failed : get is for %d pages\n",
2611 dev->name,__FUNCTION__,
2612 privptr->p_buff_pages_perread );
2613 free_pages((unsigned long)privptr->p_buff_ccw,
2614 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
2615 /* free the write pages */
2616 p_buf=privptr->p_buff_write;
2617 while (p_buf!=NULL) {
2618 free_pages((unsigned long)p_buf->p_buffer,
2619 (int)pages_to_order_of_mag(
2620 privptr->p_buff_pages_perwrite ));
2621 p_buf=p_buf->next;
2622 }
2623 /* free any read pages already alloc */
2624 p_buf=privptr->p_buff_read;
2625 while (p_buf!=NULL) {
2626 free_pages((unsigned long)p_buf->p_buffer,
2627 (int)pages_to_order_of_mag(
2628 privptr->p_buff_pages_perread ));
2629 p_buf=p_buf->next;
2630 }
2631 privptr->p_buff_ccw=NULL;
2632 privptr->p_buff_write=NULL;
2633 #ifdef FUNCTRACE
2634 printk(KERN_INFO "%s: %s() exit on line %d, rc = ENOMEM\n",
2635 dev->name,__FUNCTION__,
2636 __LINE__);
2637 #endif
2638 return -ENOMEM;
2639 }
2640 memset(p_buff, 0x00, privptr->p_env->read_size);
2641 p_buf = p_free_chain;
2642 privptr->p_buff_read = p_buf;
2643 p_free_chain = p_buf->next;
2644
2645 if (p_last_CCWB==NULL) {
2646 p_buf->next=NULL;
2647 real_TIC_address=0;
2648 p_last_CCWB=p_buf;
2649 }
2650 else {
2651 p_buf->next=p_first_CCWB;
2652 real_TIC_address=
2653 (addr_t)__pa(
2654 &p_first_CCWB -> read );
2655 }
2656
2657 p_first_CCWB=p_buf;
2658 /* save buff address */
2659 p_buf->p_buffer=(struct clawbuf *)p_buff;
2660 /* initialize read command */
2661 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
2662 p_buf-> read.cda = (__u32)__pa(p_buff);
2663 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2664 p_buf-> read.count = privptr->p_env->read_size;
2665
2666 /* initialize read_h command */
2667 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
2668 p_buf-> read_h.cda =
2669 (__u32)__pa(&(p_buf->header));
2670 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2671 p_buf-> read_h.count = sizeof(struct clawh);
2672
2673 /* initialize Signal command */
2674 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
2675 p_buf-> signal.cda =
2676 (__u32)__pa(&(pClawH->flag));
2677 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
2678 p_buf-> signal.count = 1;
2679
2680 /* initialize r_TIC_1 command */
2681 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
2682 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
2683 p_buf-> r_TIC_1.flags = 0;
2684 p_buf-> r_TIC_1.count = 0;
2685
2686 /* initialize r_read_FF command */
2687 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
2688 p_buf-> r_read_FF.cda =
2689 (__u32)__pa(&(pClawH->flag));
2690 p_buf-> r_read_FF.flags =
2691 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
2692 p_buf-> r_read_FF.count = 1;
2693
2694 /* initialize r_TIC_2 */
2695 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2696 sizeof(struct ccw1));
2697
2698 /* initialize Header */
2699 p_buf->header.length=0xffff;
2700 p_buf->header.opcode=0xff;
2701 p_buf->header.flag=CLAW_PENDING;
2702
2703 } /* For read_buffers */
2704 } /* read_size >= PAGE_SIZE */
2705 } /* pBuffread = NULL */
2706 #ifdef DEBUGMSG
2707 printk(KERN_INFO "%s: %s() > End build claw read free chain \n",
2708 dev->name,__FUNCTION__);
2709 p_buf=p_first_CCWB;
2710 while (p_buf!=NULL) {
2711 dumpit((char *)p_buf, sizeof(struct ccwbk));
2712 p_buf=p_buf->next;
2713 }
2714
2715 #endif
2716 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
2717 privptr->buffs_alloc = 1;
2718 #ifdef FUNCTRACE
2719 printk(KERN_INFO "%s: %s() exit on line %d\n",
2720 dev->name,__FUNCTION__,__LINE__);
2721 #endif
2722 return 0;
2723 } /* end of init_ccw_bk */
2724
2725 /*-------------------------------------------------------------------*
2726 * *
2727 * probe_error *
2728 * *
2729 *--------------------------------------------------------------------*/
2730
2731 static void
2732 probe_error( struct ccwgroup_device *cgdev)
2733 {
2734 struct claw_privbk *privptr;
2735 #ifdef FUNCTRACE
2736 printk(KERN_INFO "%s enter \n",__FUNCTION__);
2737 #endif
2738 CLAW_DBF_TEXT(4,trace,"proberr");
2739 #ifdef DEBUGMSG
2740 printk(KERN_INFO "%s variable cgdev =\n",__FUNCTION__);
2741 dumpit((char *) cgdev, sizeof(struct ccwgroup_device));
2742 #endif
2743 privptr=(struct claw_privbk *)cgdev->dev.driver_data;
2744 if (privptr!=NULL) {
2745 kfree(privptr->p_env);
2746 privptr->p_env=NULL;
2747 kfree(privptr->p_mtc_envelope);
2748 privptr->p_mtc_envelope=NULL;
2749 kfree(privptr);
2750 privptr=NULL;
2751 }
2752 #ifdef FUNCTRACE
2753 printk(KERN_INFO "%s > exit on line %d\n",
2754 __FUNCTION__,__LINE__);
2755 #endif
2756
2757 return;
2758 } /* probe_error */
2759
2760
2761
2762 /*-------------------------------------------------------------------*
2763 * claw_process_control *
2764 * *
2765 * *
2766 *--------------------------------------------------------------------*/
2767
2768 static int
2769 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2770 {
2771
2772 struct clawbuf *p_buf;
2773 struct clawctl ctlbk;
2774 struct clawctl *p_ctlbk;
2775 char temp_host_name[8];
2776 char temp_ws_name[8];
2777 struct claw_privbk *privptr;
2778 struct claw_env *p_env;
2779 struct sysval *p_sysval;
2780 struct conncmd *p_connect=NULL;
2781 int rc;
2782 struct chbk *p_ch = NULL;
2783 #ifdef FUNCTRACE
2784 printk(KERN_INFO "%s: %s() > enter \n",
2785 dev->name,__FUNCTION__);
2786 #endif
2787 CLAW_DBF_TEXT(2,setup,"clw_cntl");
2788 #ifdef DEBUGMSG
2789 printk(KERN_INFO "%s: variable dev =\n",dev->name);
2790 dumpit((char *) dev, sizeof(struct net_device));
2791 printk(KERN_INFO "%s: variable p_ccw =\n",dev->name);
2792 dumpit((char *) p_ccw, sizeof(struct ccwbk *));
2793 #endif
2794 udelay(1000); /* Wait a ms for the control packets to
2795 *catch up to each other */
2796 privptr=dev->priv;
2797 p_env=privptr->p_env;
2798 memcpy( &temp_host_name, p_env->host_name, 8);
2799 memcpy( &temp_ws_name, p_env->adapter_name , 8);
2800 printk(KERN_INFO "%s: CLAW device %.8s: "
2801 "Received Control Packet\n",
2802 dev->name, temp_ws_name);
2803 if (privptr->release_pend==1) {
2804 #ifdef FUNCTRACE
2805 printk(KERN_INFO "%s: %s() > "
2806 "exit on line %d, rc=0\n",
2807 dev->name,__FUNCTION__,__LINE__);
2808 #endif
2809 return 0;
2810 }
2811 p_buf=p_ccw->p_buffer;
2812 p_ctlbk=&ctlbk;
2813 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2814 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2815 } else {
2816 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2817 }
2818 #ifdef IOTRACE
2819 printk(KERN_INFO "%s: dump claw control data inbound\n",dev->name);
2820 dumpit((char *)p_ctlbk, sizeof(struct clawctl));
2821 #endif
2822 switch (p_ctlbk->command)
2823 {
2824 case SYSTEM_VALIDATE_REQUEST:
2825 if (p_ctlbk->version!=CLAW_VERSION_ID) {
2826 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2827 CLAW_RC_WRONG_VERSION );
2828 printk("%s: %d is wrong version id. "
2829 "Expected %d\n",
2830 dev->name, p_ctlbk->version,
2831 CLAW_VERSION_ID);
2832 }
2833 p_sysval=(struct sysval *)&(p_ctlbk->data);
2834 printk( "%s: Recv Sys Validate Request: "
2835 "Vers=%d,link_id=%d,Corr=%d,WS name=%."
2836 "8s,Host name=%.8s\n",
2837 dev->name, p_ctlbk->version,
2838 p_ctlbk->linkid,
2839 p_ctlbk->correlator,
2840 p_sysval->WS_name,
2841 p_sysval->host_name);
2842 if (0!=memcmp(temp_host_name,p_sysval->host_name,8)) {
2843 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2844 CLAW_RC_NAME_MISMATCH );
2845 CLAW_DBF_TEXT(2,setup,"HSTBAD");
2846 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->host_name);
2847 CLAW_DBF_TEXT_(2,setup,"%s",temp_host_name);
2848 printk(KERN_INFO "%s: Host name mismatch\n",
2849 dev->name);
2850 printk(KERN_INFO "%s: Received :%s: "
2851 "expected :%s: \n",
2852 dev->name,
2853 p_sysval->host_name,
2854 temp_host_name);
2855 }
2856 if (0!=memcmp(temp_ws_name,p_sysval->WS_name,8)) {
2857 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2858 CLAW_RC_NAME_MISMATCH );
2859 CLAW_DBF_TEXT(2,setup,"WSNBAD");
2860 CLAW_DBF_TEXT_(2,setup,"%s",p_sysval->WS_name);
2861 CLAW_DBF_TEXT_(2,setup,"%s",temp_ws_name);
2862 printk(KERN_INFO "%s: WS name mismatch\n",
2863 dev->name);
2864 printk(KERN_INFO "%s: Received :%s: "
2865 "expected :%s: \n",
2866 dev->name,
2867 p_sysval->WS_name,
2868 temp_ws_name);
2869 }
2870 if (( p_sysval->write_frame_size < p_env->write_size) &&
2871 ( p_env->packing == 0)) {
2872 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2873 CLAW_RC_HOST_RCV_TOO_SMALL );
2874 printk(KERN_INFO "%s: host write size is too "
2875 "small\n", dev->name);
2876 CLAW_DBF_TEXT(2,setup,"wrtszbad");
2877 }
2878 if (( p_sysval->read_frame_size < p_env->read_size) &&
2879 ( p_env->packing == 0)) {
2880 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2881 CLAW_RC_HOST_RCV_TOO_SMALL );
2882 printk(KERN_INFO "%s: host read size is too "
2883 "small\n", dev->name);
2884 CLAW_DBF_TEXT(2,setup,"rdsizbad");
2885 }
2886 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0 );
2887 printk("%s: CLAW device %.8s: System validate"
2888 " completed.\n",dev->name, temp_ws_name);
2889 printk("%s: sys Validate Rsize:%d Wsize:%d\n",dev->name,
2890 p_sysval->read_frame_size,p_sysval->write_frame_size);
2891 privptr->system_validate_comp=1;
2892 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
2893 p_env->packing = PACKING_ASK;
2894 }
2895 claw_strt_conn_req(dev);
2896 break;
2897
2898 case SYSTEM_VALIDATE_RESPONSE:
2899 p_sysval=(struct sysval *)&(p_ctlbk->data);
2900 printk("%s: Recv Sys Validate Resp: Vers=%d,Corr=%d,RC=%d,"
2901 "WS name=%.8s,Host name=%.8s\n",
2902 dev->name,
2903 p_ctlbk->version,
2904 p_ctlbk->correlator,
2905 p_ctlbk->rc,
2906 p_sysval->WS_name,
2907 p_sysval->host_name);
2908 switch (p_ctlbk->rc)
2909 {
2910 case 0:
2911 printk(KERN_INFO "%s: CLAW device "
2912 "%.8s: System validate "
2913 "completed.\n",
2914 dev->name, temp_ws_name);
2915 if (privptr->system_validate_comp == 0)
2916 claw_strt_conn_req(dev);
2917 privptr->system_validate_comp=1;
2918 break;
2919 case CLAW_RC_NAME_MISMATCH:
2920 printk(KERN_INFO "%s: Sys Validate "
2921 "Resp : Host, WS name is "
2922 "mismatch\n",
2923 dev->name);
2924 break;
2925 case CLAW_RC_WRONG_VERSION:
2926 printk(KERN_INFO "%s: Sys Validate "
2927 "Resp : Wrong version\n",
2928 dev->name);
2929 break;
2930 case CLAW_RC_HOST_RCV_TOO_SMALL:
2931 printk(KERN_INFO "%s: Sys Validate "
2932 "Resp : bad frame size\n",
2933 dev->name);
2934 break;
2935 default:
2936 printk(KERN_INFO "%s: Sys Validate "
2937 "error code=%d \n",
2938 dev->name, p_ctlbk->rc );
2939 break;
2940 }
2941 break;
2942
2943 case CONNECTION_REQUEST:
2944 p_connect=(struct conncmd *)&(p_ctlbk->data);
2945 printk(KERN_INFO "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2946 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2947 dev->name,
2948 p_ctlbk->version,
2949 p_ctlbk->linkid,
2950 p_ctlbk->correlator,
2951 p_connect->host_name,
2952 p_connect->WS_name);
2953 if (privptr->active_link_ID!=0 ) {
2954 claw_snd_disc(dev, p_ctlbk);
2955 printk(KERN_INFO "%s: Conn Req error : "
2956 "already logical link is active \n",
2957 dev->name);
2958 }
2959 if (p_ctlbk->linkid!=1 ) {
2960 claw_snd_disc(dev, p_ctlbk);
2961 printk(KERN_INFO "%s: Conn Req error : "
2962 "req logical link id is not 1\n",
2963 dev->name);
2964 }
2965 rc=find_link(dev,
2966 p_connect->host_name, p_connect->WS_name);
2967 if (rc!=0) {
2968 claw_snd_disc(dev, p_ctlbk);
2969 printk(KERN_INFO "%s: Conn Req error : "
2970 "req appl name does not match\n",
2971 dev->name);
2972 }
2973 claw_send_control(dev,
2974 CONNECTION_CONFIRM, p_ctlbk->linkid,
2975 p_ctlbk->correlator,
2976 0, p_connect->host_name,
2977 p_connect->WS_name);
2978 if (p_env->packing == PACKING_ASK) {
2979 printk("%s: Now Pack ask\n",dev->name);
2980 p_env->packing = PACK_SEND;
2981 claw_snd_conn_req(dev,0);
2982 }
2983 printk(KERN_INFO "%s: CLAW device %.8s: Connection "
2984 "completed link_id=%d.\n",
2985 dev->name, temp_ws_name,
2986 p_ctlbk->linkid);
2987 privptr->active_link_ID=p_ctlbk->linkid;
2988 p_ch=&privptr->channel[WRITE];
2989 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2990 break;
2991 case CONNECTION_RESPONSE:
2992 p_connect=(struct conncmd *)&(p_ctlbk->data);
2993 printk(KERN_INFO "%s: Revc Conn Resp: Vers=%d,link_id=%d,"
2994 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2995 dev->name,
2996 p_ctlbk->version,
2997 p_ctlbk->linkid,
2998 p_ctlbk->correlator,
2999 p_ctlbk->rc,
3000 p_connect->host_name,
3001 p_connect->WS_name);
3002
3003 if (p_ctlbk->rc !=0 ) {
3004 printk(KERN_INFO "%s: Conn Resp error: rc=%d \n",
3005 dev->name, p_ctlbk->rc);
3006 return 1;
3007 }
3008 rc=find_link(dev,
3009 p_connect->host_name, p_connect->WS_name);
3010 if (rc!=0) {
3011 claw_snd_disc(dev, p_ctlbk);
3012 printk(KERN_INFO "%s: Conn Resp error: "
3013 "req appl name does not match\n",
3014 dev->name);
3015 }
3016 /* should be until CONNECTION_CONFIRM */
3017 privptr->active_link_ID = - (p_ctlbk->linkid);
3018 break;
3019 case CONNECTION_CONFIRM:
3020 p_connect=(struct conncmd *)&(p_ctlbk->data);
3021 printk(KERN_INFO "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
3022 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
3023 dev->name,
3024 p_ctlbk->version,
3025 p_ctlbk->linkid,
3026 p_ctlbk->correlator,
3027 p_connect->host_name,
3028 p_connect->WS_name);
3029 if (p_ctlbk->linkid== -(privptr->active_link_ID)) {
3030 privptr->active_link_ID=p_ctlbk->linkid;
3031 if (p_env->packing > PACKING_ASK) {
3032 printk(KERN_INFO "%s: Confirmed Now packing\n",dev->name);
3033 p_env->packing = DO_PACKED;
3034 }
3035 p_ch=&privptr->channel[WRITE];
3036 wake_up(&p_ch->wait);
3037 }
3038 else {
3039 printk(KERN_INFO "%s: Conn confirm: "
3040 "unexpected linkid=%d \n",
3041 dev->name, p_ctlbk->linkid);
3042 claw_snd_disc(dev, p_ctlbk);
3043 }
3044 break;
3045 case DISCONNECT:
3046 printk(KERN_INFO "%s: Disconnect: "
3047 "Vers=%d,link_id=%d,Corr=%d\n",
3048 dev->name, p_ctlbk->version,
3049 p_ctlbk->linkid, p_ctlbk->correlator);
3050 if ((p_ctlbk->linkid == 2) &&
3051 (p_env->packing == PACK_SEND)) {
3052 privptr->active_link_ID = 1;
3053 p_env->packing = DO_PACKED;
3054 }
3055 else
3056 privptr->active_link_ID=0;
3057 break;
3058 case CLAW_ERROR:
3059 printk(KERN_INFO "%s: CLAW ERROR detected\n",
3060 dev->name);
3061 break;
3062 default:
3063 printk(KERN_INFO "%s: Unexpected command code=%d \n",
3064 dev->name, p_ctlbk->command);
3065 break;
3066 }
3067
3068 #ifdef FUNCTRACE
3069 printk(KERN_INFO "%s: %s() exit on line %d, rc = 0\n",
3070 dev->name,__FUNCTION__,__LINE__);
3071 #endif
3072
3073 return 0;
3074 } /* end of claw_process_control */
3075
3076
3077 /*-------------------------------------------------------------------*
3078 * claw_send_control *
3079 * *
3080 *--------------------------------------------------------------------*/
3081
3082 static int
3083 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
3084 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
3085 {
3086 struct claw_privbk *privptr;
3087 struct clawctl *p_ctl;
3088 struct sysval *p_sysval;
3089 struct conncmd *p_connect;
3090 struct sk_buff *skb;
3091
3092 #ifdef FUNCTRACE
3093 printk(KERN_INFO "%s:%s > enter \n",dev->name,__FUNCTION__);
3094 #endif
3095 CLAW_DBF_TEXT(2,setup,"sndcntl");
3096 #ifdef DEBUGMSG
3097 printk(KERN_INFO "%s: Sending Control Packet \n",dev->name);
3098 printk(KERN_INFO "%s: variable type = 0x%X, link = "
3099 "%d, correlator = %d, rc = %d\n",
3100 dev->name,type, link, correlator, rc);
3101 printk(KERN_INFO "%s: variable local_name = %s, "
3102 "remote_name = %s\n",dev->name, local_name, remote_name);
3103 #endif
3104 privptr=dev->priv;
3105 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3106
3107 p_ctl->command=type;
3108 p_ctl->version=CLAW_VERSION_ID;
3109 p_ctl->linkid=link;
3110 p_ctl->correlator=correlator;
3111 p_ctl->rc=rc;
3112
3113 p_sysval=(struct sysval *)&p_ctl->data;
3114 p_connect=(struct conncmd *)&p_ctl->data;
3115
3116 switch (p_ctl->command) {
3117 case SYSTEM_VALIDATE_REQUEST:
3118 case SYSTEM_VALIDATE_RESPONSE:
3119 memcpy(&p_sysval->host_name, local_name, 8);
3120 memcpy(&p_sysval->WS_name, remote_name, 8);
3121 if (privptr->p_env->packing > 0) {
3122 p_sysval->read_frame_size=DEF_PACK_BUFSIZE;
3123 p_sysval->write_frame_size=DEF_PACK_BUFSIZE;
3124 } else {
3125 /* how big is the piggest group of packets */
3126 p_sysval->read_frame_size=privptr->p_env->read_size;
3127 p_sysval->write_frame_size=privptr->p_env->write_size;
3128 }
3129 memset(&p_sysval->reserved, 0x00, 4);
3130 break;
3131 case CONNECTION_REQUEST:
3132 case CONNECTION_RESPONSE:
3133 case CONNECTION_CONFIRM:
3134 case DISCONNECT:
3135 memcpy(&p_sysval->host_name, local_name, 8);
3136 memcpy(&p_sysval->WS_name, remote_name, 8);
3137 if (privptr->p_env->packing > 0) {
3138 /* How big is the biggest packet */
3139 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
3140 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
3141 } else {
3142 memset(&p_connect->reserved1, 0x00, 4);
3143 memset(&p_connect->reserved2, 0x00, 4);
3144 }
3145 break;
3146 default:
3147 break;
3148 }
3149
3150 /* write Control Record to the device */
3151
3152
3153 skb = dev_alloc_skb(sizeof(struct clawctl));
3154 if (!skb) {
3155 printk( "%s:%s low on mem, returning...\n",
3156 dev->name,__FUNCTION__);
3157 #ifdef DEBUG
3158 printk(KERN_INFO "%s:%s Exit, rc = ENOMEM\n",
3159 dev->name,__FUNCTION__);
3160 #endif
3161 return -ENOMEM;
3162 }
3163 memcpy(skb_put(skb, sizeof(struct clawctl)),
3164 p_ctl, sizeof(struct clawctl));
3165 #ifdef IOTRACE
3166 printk(KERN_INFO "%s: outbnd claw cntl data \n",dev->name);
3167 dumpit((char *)p_ctl,sizeof(struct clawctl));
3168 #endif
3169 if (privptr->p_env->packing >= PACK_SEND)
3170 claw_hw_tx(skb, dev, 1);
3171 else
3172 claw_hw_tx(skb, dev, 0);
3173 #ifdef FUNCTRACE
3174 printk(KERN_INFO "%s:%s Exit on line %d\n",
3175 dev->name,__FUNCTION__,__LINE__);
3176 #endif
3177
3178 return 0;
3179 } /* end of claw_send_control */
3180
3181 /*-------------------------------------------------------------------*
3182 * claw_snd_conn_req *
3183 * *
3184 *--------------------------------------------------------------------*/
3185 static int
3186 claw_snd_conn_req(struct net_device *dev, __u8 link)
3187 {
3188 int rc;
3189 struct claw_privbk *privptr=dev->priv;
3190 struct clawctl *p_ctl;
3191
3192 #ifdef FUNCTRACE
3193 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3194 #endif
3195 CLAW_DBF_TEXT(2,setup,"snd_conn");
3196 #ifdef DEBUGMSG
3197 printk(KERN_INFO "%s: variable link = %X, dev =\n",dev->name, link);
3198 dumpit((char *) dev, sizeof(struct net_device));
3199 #endif
3200 rc = 1;
3201 p_ctl=(struct clawctl *)&privptr->ctl_bk;
3202 p_ctl->linkid = link;
3203 if ( privptr->system_validate_comp==0x00 ) {
3204 #ifdef FUNCTRACE
3205 printk(KERN_INFO "%s:%s Exit on line %d, rc = 1\n",
3206 dev->name,__FUNCTION__,__LINE__);
3207 #endif
3208 return rc;
3209 }
3210 if (privptr->p_env->packing == PACKING_ASK )
3211 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3212 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
3213 if (privptr->p_env->packing == PACK_SEND) {
3214 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3215 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
3216 }
3217 if (privptr->p_env->packing == 0)
3218 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
3219 HOST_APPL_NAME, privptr->p_env->api_type);
3220 #ifdef FUNCTRACE
3221 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3222 dev->name,__FUNCTION__,__LINE__, rc);
3223 #endif
3224 return rc;
3225
3226 } /* end of claw_snd_conn_req */
3227
3228
3229 /*-------------------------------------------------------------------*
3230 * claw_snd_disc *
3231 * *
3232 *--------------------------------------------------------------------*/
3233
3234 static int
3235 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
3236 {
3237 int rc;
3238 struct conncmd * p_connect;
3239
3240 #ifdef FUNCTRACE
3241 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3242 #endif
3243 CLAW_DBF_TEXT(2,setup,"snd_dsc");
3244 #ifdef DEBUGMSG
3245 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3246 dumpit((char *) dev, sizeof(struct net_device));
3247 printk(KERN_INFO "%s: variable p_ctl",dev->name);
3248 dumpit((char *) p_ctl, sizeof(struct clawctl));
3249 #endif
3250 p_connect=(struct conncmd *)&p_ctl->data;
3251
3252 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
3253 p_ctl->correlator, 0,
3254 p_connect->host_name, p_connect->WS_name);
3255 #ifdef FUNCTRACE
3256 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3257 dev->name,__FUNCTION__, __LINE__, rc);
3258 #endif
3259 return rc;
3260 } /* end of claw_snd_disc */
3261
3262
3263 /*-------------------------------------------------------------------*
3264 * claw_snd_sys_validate_rsp *
3265 * *
3266 *--------------------------------------------------------------------*/
3267
3268 static int
3269 claw_snd_sys_validate_rsp(struct net_device *dev,
3270 struct clawctl *p_ctl, __u32 return_code)
3271 {
3272 struct claw_env * p_env;
3273 struct claw_privbk *privptr;
3274 int rc;
3275
3276 #ifdef FUNCTRACE
3277 printk(KERN_INFO "%s:%s Enter\n",
3278 dev->name,__FUNCTION__);
3279 #endif
3280 CLAW_DBF_TEXT(2,setup,"chkresp");
3281 #ifdef DEBUGMSG
3282 printk(KERN_INFO "%s: variable return_code = %d, dev =\n",
3283 dev->name, return_code);
3284 dumpit((char *) dev, sizeof(struct net_device));
3285 printk(KERN_INFO "%s: variable p_ctl =\n",dev->name);
3286 dumpit((char *) p_ctl, sizeof(struct clawctl));
3287 #endif
3288 privptr = dev->priv;
3289 p_env=privptr->p_env;
3290 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
3291 p_ctl->linkid,
3292 p_ctl->correlator,
3293 return_code,
3294 p_env->host_name,
3295 p_env->adapter_name );
3296 #ifdef FUNCTRACE
3297 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3298 dev->name,__FUNCTION__,__LINE__, rc);
3299 #endif
3300 return rc;
3301 } /* end of claw_snd_sys_validate_rsp */
3302
3303 /*-------------------------------------------------------------------*
3304 * claw_strt_conn_req *
3305 * *
3306 *--------------------------------------------------------------------*/
3307
3308 static int
3309 claw_strt_conn_req(struct net_device *dev )
3310 {
3311 int rc;
3312
3313 #ifdef FUNCTRACE
3314 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3315 #endif
3316 CLAW_DBF_TEXT(2,setup,"conn_req");
3317 #ifdef DEBUGMSG
3318 printk(KERN_INFO "%s: variable dev =\n",dev->name);
3319 dumpit((char *) dev, sizeof(struct net_device));
3320 #endif
3321 rc=claw_snd_conn_req(dev, 1);
3322 #ifdef FUNCTRACE
3323 printk(KERN_INFO "%s:%s Exit on line %d, rc = %d\n",
3324 dev->name,__FUNCTION__,__LINE__, rc);
3325 #endif
3326 return rc;
3327 } /* end of claw_strt_conn_req */
3328
3329
3330
3331 /*-------------------------------------------------------------------*
3332 * claw_stats *
3333 *-------------------------------------------------------------------*/
3334
3335 static struct
3336 net_device_stats *claw_stats(struct net_device *dev)
3337 {
3338 struct claw_privbk *privptr;
3339 #ifdef FUNCTRACE
3340 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3341 #endif
3342 CLAW_DBF_TEXT(4,trace,"stats");
3343 privptr = dev->priv;
3344 #ifdef FUNCTRACE
3345 printk(KERN_INFO "%s:%s Exit on line %d\n",
3346 dev->name,__FUNCTION__,__LINE__);
3347 #endif
3348 return &privptr->stats;
3349 } /* end of claw_stats */
3350
3351
3352 /*-------------------------------------------------------------------*
3353 * unpack_read *
3354 * *
3355 *--------------------------------------------------------------------*/
3356 static void
3357 unpack_read(struct net_device *dev )
3358 {
3359 struct sk_buff *skb;
3360 struct claw_privbk *privptr;
3361 struct claw_env *p_env;
3362 struct ccwbk *p_this_ccw;
3363 struct ccwbk *p_first_ccw;
3364 struct ccwbk *p_last_ccw;
3365 struct clawph *p_packh;
3366 void *p_packd;
3367 struct clawctl *p_ctlrec=NULL;
3368
3369 __u32 len_of_data;
3370 __u32 pack_off;
3371 __u8 link_num;
3372 __u8 mtc_this_frm=0;
3373 __u32 bytes_to_mov;
3374 struct chbk *p_ch = NULL;
3375 int i=0;
3376 int p=0;
3377
3378 #ifdef FUNCTRACE
3379 printk(KERN_INFO "%s:%s enter \n",dev->name,__FUNCTION__);
3380 #endif
3381 CLAW_DBF_TEXT(4,trace,"unpkread");
3382 p_first_ccw=NULL;
3383 p_last_ccw=NULL;
3384 p_packh=NULL;
3385 p_packd=NULL;
3386 privptr=dev->priv;
3387 p_env = privptr->p_env;
3388 p_this_ccw=privptr->p_read_active_first;
3389 i=0;
3390 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
3391 #ifdef IOTRACE
3392 printk(KERN_INFO "%s p_this_ccw \n",dev->name);
3393 dumpit((char*)p_this_ccw, sizeof(struct ccwbk));
3394 printk(KERN_INFO "%s Inbound p_this_ccw->p_buffer(64)"
3395 " pk=%d \n",dev->name,p_env->packing);
3396 dumpit((char *)p_this_ccw->p_buffer, 64 );
3397 #endif
3398 pack_off = 0;
3399 p = 0;
3400 p_this_ccw->header.flag=CLAW_PENDING;
3401 privptr->p_read_active_first=p_this_ccw->next;
3402 p_this_ccw->next=NULL;
3403 p_packh = (struct clawph *)p_this_ccw->p_buffer;
3404 if ((p_env->packing == PACK_SEND) &&
3405 (p_packh->len == 32) &&
3406 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
3407 p_packh++; /* peek past pack header */
3408 p_ctlrec = (struct clawctl *)p_packh;
3409 p_packh--; /* un peek */
3410 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
3411 (p_ctlrec->command == CONNECTION_CONFIRM))
3412 p_env->packing = DO_PACKED;
3413 }
3414 if (p_env->packing == DO_PACKED)
3415 link_num=p_packh->link_num;
3416 else
3417 link_num=p_this_ccw->header.opcode / 8;
3418 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
3419 #ifdef DEBUGMSG
3420 printk(KERN_INFO "%s: %s > More_to_come is ON\n",
3421 dev->name,__FUNCTION__);
3422 #endif
3423 mtc_this_frm=1;
3424 if (p_this_ccw->header.length!=
3425 privptr->p_env->read_size ) {
3426 printk(KERN_INFO " %s: Invalid frame detected "
3427 "length is %02x\n" ,
3428 dev->name, p_this_ccw->header.length);
3429 }
3430 }
3431
3432 if (privptr->mtc_skipping) {
3433 /*
3434 * We're in the mode of skipping past a
3435 * multi-frame message
3436 * that we can't process for some reason or other.
3437 * The first frame without the More-To-Come flag is
3438 * the last frame of the skipped message.
3439 */
3440 /* in case of More-To-Come not set in this frame */
3441 if (mtc_this_frm==0) {
3442 privptr->mtc_skipping=0; /* Ok, the end */
3443 privptr->mtc_logical_link=-1;
3444 }
3445 #ifdef DEBUGMSG
3446 printk(KERN_INFO "%s:%s goto next "
3447 "frame from MoretoComeSkip \n",
3448 dev->name,__FUNCTION__);
3449 #endif
3450 goto NextFrame;
3451 }
3452
3453 if (link_num==0) {
3454 claw_process_control(dev, p_this_ccw);
3455 #ifdef DEBUGMSG
3456 printk(KERN_INFO "%s:%s goto next "
3457 "frame from claw_process_control \n",
3458 dev->name,__FUNCTION__);
3459 #endif
3460 CLAW_DBF_TEXT(4,trace,"UnpkCntl");
3461 goto NextFrame;
3462 }
3463 unpack_next:
3464 if (p_env->packing == DO_PACKED) {
3465 if (pack_off > p_env->read_size)
3466 goto NextFrame;
3467 p_packd = p_this_ccw->p_buffer+pack_off;
3468 p_packh = (struct clawph *) p_packd;
3469 if ((p_packh->len == 0) || /* all done with this frame? */
3470 (p_packh->flag != 0))
3471 goto NextFrame;
3472 bytes_to_mov = p_packh->len;
3473 pack_off += bytes_to_mov+sizeof(struct clawph);
3474 p++;
3475 } else {
3476 bytes_to_mov=p_this_ccw->header.length;
3477 }
3478 if (privptr->mtc_logical_link<0) {
3479 #ifdef DEBUGMSG
3480 printk(KERN_INFO "%s: %s mtc_logical_link < 0 \n",
3481 dev->name,__FUNCTION__);
3482 #endif
3483
3484 /*
3485 * if More-To-Come is set in this frame then we don't know
3486 * length of entire message, and hence have to allocate
3487 * large buffer */
3488
3489 /* We are starting a new envelope */
3490 privptr->mtc_offset=0;
3491 privptr->mtc_logical_link=link_num;
3492 }
3493
3494 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
3495 /* error */
3496 #ifdef DEBUGMSG
3497 printk(KERN_INFO "%s: %s > goto next "
3498 "frame from MoretoComeSkip \n",
3499 dev->name,
3500 __FUNCTION__);
3501 printk(KERN_INFO " bytes_to_mov %d > (MAX_ENVELOPE_"
3502 "SIZE-privptr->mtc_offset %d)\n",
3503 bytes_to_mov,(MAX_ENVELOPE_SIZE- privptr->mtc_offset));
3504 #endif
3505 privptr->stats.rx_frame_errors++;
3506 goto NextFrame;
3507 }
3508 if (p_env->packing == DO_PACKED) {
3509 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3510 p_packd+sizeof(struct clawph), bytes_to_mov);
3511
3512 } else {
3513 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
3514 p_this_ccw->p_buffer, bytes_to_mov);
3515 }
3516 #ifdef DEBUGMSG
3517 printk(KERN_INFO "%s: %s() received data \n",
3518 dev->name,__FUNCTION__);
3519 if (p_env->packing == DO_PACKED)
3520 dumpit((char *)p_packd+sizeof(struct clawph),32);
3521 else
3522 dumpit((char *)p_this_ccw->p_buffer, 32);
3523 printk(KERN_INFO "%s: %s() bytelength %d \n",
3524 dev->name,__FUNCTION__,bytes_to_mov);
3525 #endif
3526 if (mtc_this_frm==0) {
3527 len_of_data=privptr->mtc_offset+bytes_to_mov;
3528 skb=dev_alloc_skb(len_of_data);
3529 if (skb) {
3530 memcpy(skb_put(skb,len_of_data),
3531 privptr->p_mtc_envelope,
3532 len_of_data);
3533 skb->mac.raw=skb->data;
3534 skb->dev=dev;
3535 skb->protocol=htons(ETH_P_IP);
3536 skb->ip_summed=CHECKSUM_UNNECESSARY;
3537 privptr->stats.rx_packets++;
3538 privptr->stats.rx_bytes+=len_of_data;
3539 netif_rx(skb);
3540 #ifdef DEBUGMSG
3541 printk(KERN_INFO "%s: %s() netif_"
3542 "rx(skb) completed \n",
3543 dev->name,__FUNCTION__);
3544 #endif
3545 }
3546 else {
3547 privptr->stats.rx_dropped++;
3548 printk(KERN_WARNING "%s: %s() low on memory\n",
3549 dev->name,__FUNCTION__);
3550 }
3551 privptr->mtc_offset=0;
3552 privptr->mtc_logical_link=-1;
3553 }
3554 else {
3555 privptr->mtc_offset+=bytes_to_mov;
3556 }
3557 if (p_env->packing == DO_PACKED)
3558 goto unpack_next;
3559 NextFrame:
3560 /*
3561 * Remove ThisCCWblock from active read queue, and add it
3562 * to queue of free blocks to be reused.
3563 */
3564 i++;
3565 p_this_ccw->header.length=0xffff;
3566 p_this_ccw->header.opcode=0xff;
3567 /*
3568 * add this one to the free queue for later reuse
3569 */
3570 if (p_first_ccw==NULL) {
3571 p_first_ccw = p_this_ccw;
3572 }
3573 else {
3574 p_last_ccw->next = p_this_ccw;
3575 }
3576 p_last_ccw = p_this_ccw;
3577 /*
3578 * chain to next block on active read queue
3579 */
3580 p_this_ccw = privptr->p_read_active_first;
3581 CLAW_DBF_TEXT_(4,trace,"rxpkt %d",p);
3582 } /* end of while */
3583
3584 /* check validity */
3585
3586 #ifdef IOTRACE
3587 printk(KERN_INFO "%s:%s processed frame is %d \n",
3588 dev->name,__FUNCTION__,i);
3589 printk(KERN_INFO "%s:%s F:%lx L:%lx\n",
3590 dev->name,
3591 __FUNCTION__,
3592 (unsigned long)p_first_ccw,
3593 (unsigned long)p_last_ccw);
3594 #endif
3595 CLAW_DBF_TEXT_(4,trace,"rxfrm %d",i);
3596 add_claw_reads(dev, p_first_ccw, p_last_ccw);
3597 p_ch=&privptr->channel[READ];
3598 claw_strt_read(dev, LOCK_YES);
3599 #ifdef FUNCTRACE
3600 printk(KERN_INFO "%s: %s exit on line %d\n",
3601 dev->name, __FUNCTION__, __LINE__);
3602 #endif
3603 return;
3604 } /* end of unpack_read */
3605
3606 /*-------------------------------------------------------------------*
3607 * claw_strt_read *
3608 * *
3609 *--------------------------------------------------------------------*/
3610 static void
3611 claw_strt_read (struct net_device *dev, int lock )
3612 {
3613 int rc = 0;
3614 __u32 parm;
3615 unsigned long saveflags = 0;
3616 struct claw_privbk *privptr=dev->priv;
3617 struct ccwbk*p_ccwbk;
3618 struct chbk *p_ch;
3619 struct clawh *p_clawh;
3620 p_ch=&privptr->channel[READ];
3621
3622 #ifdef FUNCTRACE
3623 printk(KERN_INFO "%s:%s Enter \n",dev->name,__FUNCTION__);
3624 printk(KERN_INFO "%s: variable lock = %d, dev =\n",dev->name, lock);
3625 dumpit((char *) dev, sizeof(struct net_device));
3626 #endif
3627 CLAW_DBF_TEXT(4,trace,"StRdNter");
3628 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3629 p_clawh->flag=CLAW_IDLE; /* 0x00 */
3630
3631 if ((privptr->p_write_active_first!=NULL &&
3632 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
3633 (privptr->p_read_active_first!=NULL &&
3634 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
3635 p_clawh->flag=CLAW_BUSY; /* 0xff */
3636 }
3637 #ifdef DEBUGMSG
3638 printk(KERN_INFO "%s:%s state-%02x\n" ,
3639 dev->name,__FUNCTION__, p_ch->claw_state);
3640 #endif
3641 if (lock==LOCK_YES) {
3642 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
3643 }
3644 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3645 #ifdef DEBUGMSG
3646 printk(KERN_INFO "%s: HOT READ started in %s\n" ,
3647 dev->name,__FUNCTION__);
3648 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
3649 dumpit((char *)&p_clawh->flag , 1);
3650 #endif
3651 CLAW_DBF_TEXT(4,trace,"HotRead");
3652 p_ccwbk=privptr->p_read_active_first;
3653 parm = (unsigned long) p_ch;
3654 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
3655 0xff, 0);
3656 if (rc != 0) {
3657 ccw_check_return_code(p_ch->cdev, rc);
3658 }
3659 }
3660 else {
3661 #ifdef DEBUGMSG
3662 printk(KERN_INFO "%s: No READ started by %s() In progress\n" ,
3663 dev->name,__FUNCTION__);
3664 #endif
3665 CLAW_DBF_TEXT(2,trace,"ReadAct");
3666 }
3667
3668 if (lock==LOCK_YES) {
3669 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
3670 }
3671 #ifdef FUNCTRACE
3672 printk(KERN_INFO "%s:%s Exit on line %d\n",
3673 dev->name,__FUNCTION__,__LINE__);
3674 #endif
3675 CLAW_DBF_TEXT(4,trace,"StRdExit");
3676 return;
3677 } /* end of claw_strt_read */
3678
3679 /*-------------------------------------------------------------------*
3680 * claw_strt_out_IO *
3681 * *
3682 *--------------------------------------------------------------------*/
3683
3684 static void
3685 claw_strt_out_IO( struct net_device *dev )
3686 {
3687 int rc = 0;
3688 unsigned long parm;
3689 struct claw_privbk *privptr;
3690 struct chbk *p_ch;
3691 struct ccwbk *p_first_ccw;
3692
3693 #ifdef FUNCTRACE
3694 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3695 #endif
3696 if (!dev) {
3697 return;
3698 }
3699 privptr=(struct claw_privbk *)dev->priv;
3700 p_ch=&privptr->channel[WRITE];
3701
3702 #ifdef DEBUGMSG
3703 printk(KERN_INFO "%s:%s state-%02x\n" ,
3704 dev->name,__FUNCTION__,p_ch->claw_state);
3705 #endif
3706 CLAW_DBF_TEXT(4,trace,"strt_io");
3707 p_first_ccw=privptr->p_write_active_first;
3708
3709 if (p_ch->claw_state == CLAW_STOP)
3710 return;
3711 if (p_first_ccw == NULL) {
3712 #ifdef FUNCTRACE
3713 printk(KERN_INFO "%s:%s Exit on line %d\n",
3714 dev->name,__FUNCTION__,__LINE__);
3715 #endif
3716 return;
3717 }
3718 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
3719 parm = (unsigned long) p_ch;
3720 #ifdef DEBUGMSG
3721 printk(KERN_INFO "%s:%s do_io \n" ,dev->name,__FUNCTION__);
3722 dumpit((char *)p_first_ccw, sizeof(struct ccwbk));
3723 #endif
3724 CLAW_DBF_TEXT(2,trace,"StWrtIO");
3725 rc = ccw_device_start (p_ch->cdev,&p_first_ccw->write, parm,
3726 0xff, 0);
3727 if (rc != 0) {
3728 ccw_check_return_code(p_ch->cdev, rc);
3729 }
3730 }
3731 dev->trans_start = jiffies;
3732 #ifdef FUNCTRACE
3733 printk(KERN_INFO "%s:%s Exit on line %d\n",
3734 dev->name,__FUNCTION__,__LINE__);
3735 #endif
3736
3737 return;
3738 } /* end of claw_strt_out_IO */
3739
3740 /*-------------------------------------------------------------------*
3741 * Free write buffers *
3742 * *
3743 *--------------------------------------------------------------------*/
3744
3745 static void
3746 claw_free_wrt_buf( struct net_device *dev )
3747 {
3748
3749 struct claw_privbk *privptr=(struct claw_privbk *)dev->priv;
3750 struct ccwbk*p_first_ccw;
3751 struct ccwbk*p_last_ccw;
3752 struct ccwbk*p_this_ccw;
3753 struct ccwbk*p_next_ccw;
3754 #ifdef IOTRACE
3755 struct ccwbk*p_buf;
3756 #endif
3757 #ifdef FUNCTRACE
3758 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3759 printk(KERN_INFO "%s: free count = %d variable dev =\n",
3760 dev->name,privptr->write_free_count);
3761 #endif
3762 CLAW_DBF_TEXT(4,trace,"freewrtb");
3763 /* scan the write queue to free any completed write packets */
3764 p_first_ccw=NULL;
3765 p_last_ccw=NULL;
3766 #ifdef IOTRACE
3767 printk(KERN_INFO "%s: Dump current CCW chain \n",dev->name );
3768 p_buf=privptr->p_write_active_first;
3769 while (p_buf!=NULL) {
3770 dumpit((char *)p_buf, sizeof(struct ccwbk));
3771 p_buf=p_buf->next;
3772 }
3773 if (p_buf==NULL) {
3774 printk(KERN_INFO "%s: privptr->p_write_"
3775 "active_first==NULL\n",dev->name );
3776 }
3777 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3778 dumpit((char *)p_buf, sizeof(struct endccw));
3779 #endif
3780 p_this_ccw=privptr->p_write_active_first;
3781 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
3782 {
3783 p_next_ccw = p_this_ccw->next;
3784 if (((p_next_ccw!=NULL) &&
3785 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
3786 ((p_this_ccw == privptr->p_write_active_last) &&
3787 (p_this_ccw->header.flag!=CLAW_PENDING))) {
3788 /* The next CCW is OK or this is */
3789 /* the last CCW...free it @A1A */
3790 privptr->p_write_active_first=p_this_ccw->next;
3791 p_this_ccw->header.flag=CLAW_PENDING;
3792 p_this_ccw->next=privptr->p_write_free_chain;
3793 privptr->p_write_free_chain=p_this_ccw;
3794 ++privptr->write_free_count;
3795 privptr->stats.tx_bytes+= p_this_ccw->write.count;
3796 p_this_ccw=privptr->p_write_active_first;
3797 privptr->stats.tx_packets++;
3798 }
3799 else {
3800 break;
3801 }
3802 }
3803 if (privptr->write_free_count!=0) {
3804 claw_clearbit_busy(TB_NOBUFFER,dev);
3805 }
3806 /* whole chain removed? */
3807 if (privptr->p_write_active_first==NULL) {
3808 privptr->p_write_active_last=NULL;
3809 #ifdef DEBUGMSG
3810 printk(KERN_INFO "%s:%s p_write_"
3811 "active_first==NULL\n",dev->name,__FUNCTION__);
3812 #endif
3813 }
3814 #ifdef IOTRACE
3815 printk(KERN_INFO "%s: Dump arranged CCW chain \n",dev->name );
3816 p_buf=privptr->p_write_active_first;
3817 while (p_buf!=NULL) {
3818 dumpit((char *)p_buf, sizeof(struct ccwbk));
3819 p_buf=p_buf->next;
3820 }
3821 if (p_buf==NULL) {
3822 printk(KERN_INFO "%s: privptr->p_write_active_"
3823 "first==NULL\n",dev->name );
3824 }
3825 p_buf=(struct ccwbk*)privptr->p_end_ccw;
3826 dumpit((char *)p_buf, sizeof(struct endccw));
3827 #endif
3828
3829 CLAW_DBF_TEXT_(4,trace,"FWC=%d",privptr->write_free_count);
3830 #ifdef FUNCTRACE
3831 printk(KERN_INFO "%s:%s Exit on line %d free_count =%d\n",
3832 dev->name,__FUNCTION__, __LINE__,privptr->write_free_count);
3833 #endif
3834 return;
3835 }
3836
3837 /*-------------------------------------------------------------------*
3838 * claw free netdevice *
3839 * *
3840 *--------------------------------------------------------------------*/
3841 static void
3842 claw_free_netdevice(struct net_device * dev, int free_dev)
3843 {
3844 struct claw_privbk *privptr;
3845 #ifdef FUNCTRACE
3846 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3847 #endif
3848 CLAW_DBF_TEXT(2,setup,"free_dev");
3849
3850 if (!dev)
3851 return;
3852 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3853 privptr = dev->priv;
3854 if (dev->flags & IFF_RUNNING)
3855 claw_release(dev);
3856 if (privptr) {
3857 privptr->channel[READ].ndev = NULL; /* say it's free */
3858 }
3859 dev->priv=NULL;
3860 #ifdef MODULE
3861 if (free_dev) {
3862 free_netdev(dev);
3863 }
3864 #endif
3865 CLAW_DBF_TEXT(2,setup,"feee_ok");
3866 #ifdef FUNCTRACE
3867 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3868 #endif
3869 }
3870
3871 /**
3872 * Claw init netdevice
3873 * Initialize everything of the net device except the name and the
3874 * channel structs.
3875 */
3876 static void
3877 claw_init_netdevice(struct net_device * dev)
3878 {
3879 #ifdef FUNCTRACE
3880 printk(KERN_INFO "%s:%s Enter\n",dev->name,__FUNCTION__);
3881 #endif
3882 CLAW_DBF_TEXT(2,setup,"init_dev");
3883 CLAW_DBF_TEXT_(2,setup,"%s",dev->name);
3884 if (!dev) {
3885 printk(KERN_WARNING "claw:%s BAD Device exit line %d\n",
3886 __FUNCTION__,__LINE__);
3887 CLAW_DBF_TEXT(2,setup,"baddev");
3888 return;
3889 }
3890 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
3891 dev->hard_start_xmit = claw_tx;
3892 dev->open = claw_open;
3893 dev->stop = claw_release;
3894 dev->get_stats = claw_stats;
3895 dev->change_mtu = claw_change_mtu;
3896 dev->hard_header_len = 0;
3897 dev->addr_len = 0;
3898 dev->type = ARPHRD_SLIP;
3899 dev->tx_queue_len = 1300;
3900 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
3901 SET_MODULE_OWNER(dev);
3902 #ifdef FUNCTRACE
3903 printk(KERN_INFO "%s:%s Exit\n",dev->name,__FUNCTION__);
3904 #endif
3905 CLAW_DBF_TEXT(2,setup,"initok");
3906 return;
3907 }
3908
3909 /**
3910 * Init a new channel in the privptr->channel[i].
3911 *
3912 * @param cdev The ccw_device to be added.
3913 *
3914 * @return 0 on success, !0 on error.
3915 */
3916 static int
3917 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
3918 {
3919 struct chbk *p_ch;
3920
3921 #ifdef FUNCTRACE
3922 printk(KERN_INFO "%s:%s Enter\n",cdev->dev.bus_id,__FUNCTION__);
3923 #endif
3924 CLAW_DBF_TEXT_(2,setup,"%s",cdev->dev.bus_id);
3925 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
3926 p_ch = &privptr->channel[i];
3927 p_ch->cdev = cdev;
3928 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
3929 sscanf(cdev->dev.bus_id+4,"%x",&p_ch->devno);
3930 if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
3931 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
3932 p_ch->id,__FUNCTION__);
3933 #ifdef FUNCTRACE
3934 printk(KERN_INFO "%s:%s Exit on line %d\n",
3935 p_ch->id,__FUNCTION__,__LINE__);
3936 #endif
3937 return -ENOMEM;
3938 }
3939 memset(p_ch->irb, 0, sizeof (struct irb));
3940 #ifdef FUNCTRACE
3941 printk(KERN_INFO "%s:%s Exit on line %d\n",
3942 cdev->dev.bus_id,__FUNCTION__,__LINE__);
3943 #endif
3944 return 0;
3945 }
3946
3947
3948 /**
3949 *
3950 * Setup an interface.
3951 *
3952 * @param cgdev Device to be setup.
3953 *
3954 * @returns 0 on success, !0 on failure.
3955 */
3956 static int
3957 claw_new_device(struct ccwgroup_device *cgdev)
3958 {
3959 struct claw_privbk *privptr;
3960 struct claw_env *p_env;
3961 struct net_device *dev;
3962 int ret;
3963
3964 pr_debug("%s() called\n", __FUNCTION__);
3965 printk(KERN_INFO "claw: add for %s\n",cgdev->cdev[READ]->dev.bus_id);
3966 CLAW_DBF_TEXT(2,setup,"new_dev");
3967 privptr = cgdev->dev.driver_data;
3968 cgdev->cdev[READ]->dev.driver_data = privptr;
3969 cgdev->cdev[WRITE]->dev.driver_data = privptr;
3970 if (!privptr)
3971 return -ENODEV;
3972 p_env = privptr->p_env;
3973 sscanf(cgdev->cdev[READ]->dev.bus_id+4,"%x",
3974 &p_env->devno[READ]);
3975 sscanf(cgdev->cdev[WRITE]->dev.bus_id+4,"%x",
3976 &p_env->devno[WRITE]);
3977 ret = add_channel(cgdev->cdev[0],0,privptr);
3978 if (ret == 0)
3979 ret = add_channel(cgdev->cdev[1],1,privptr);
3980 if (ret != 0) {
3981 printk(KERN_WARNING
3982 "add channel failed "
3983 "with ret = %d\n", ret);
3984 goto out;
3985 }
3986 ret = ccw_device_set_online(cgdev->cdev[READ]);
3987 if (ret != 0) {
3988 printk(KERN_WARNING
3989 "claw: ccw_device_set_online %s READ failed "
3990 "with ret = %d\n",cgdev->cdev[READ]->dev.bus_id,ret);
3991 goto out;
3992 }
3993 ret = ccw_device_set_online(cgdev->cdev[WRITE]);
3994 if (ret != 0) {
3995 printk(KERN_WARNING
3996 "claw: ccw_device_set_online %s WRITE failed "
3997 "with ret = %d\n",cgdev->cdev[WRITE]->dev.bus_id, ret);
3998 goto out;
3999 }
4000 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
4001 if (!dev) {
4002 printk(KERN_WARNING "%s:alloc_netdev failed\n",__FUNCTION__);
4003 goto out;
4004 }
4005 dev->priv = privptr;
4006 cgdev->dev.driver_data = privptr;
4007 cgdev->cdev[READ]->dev.driver_data = privptr;
4008 cgdev->cdev[WRITE]->dev.driver_data = privptr;
4009 /* sysfs magic */
4010 SET_NETDEV_DEV(dev, &cgdev->dev);
4011 if (register_netdev(dev) != 0) {
4012 claw_free_netdevice(dev, 1);
4013 CLAW_DBF_TEXT(2,trace,"regfail");
4014 goto out;
4015 }
4016 dev->flags &=~IFF_RUNNING;
4017 if (privptr->buffs_alloc == 0) {
4018 ret=init_ccw_bk(dev);
4019 if (ret !=0) {
4020 printk(KERN_WARNING
4021 "claw: init_ccw_bk failed with ret=%d\n", ret);
4022 unregister_netdev(dev);
4023 claw_free_netdevice(dev,1);
4024 CLAW_DBF_TEXT(2,trace,"ccwmem");
4025 goto out;
4026 }
4027 }
4028 privptr->channel[READ].ndev = dev;
4029 privptr->channel[WRITE].ndev = dev;
4030 privptr->p_env->ndev = dev;
4031
4032 printk(KERN_INFO "%s:readsize=%d writesize=%d "
4033 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
4034 dev->name, p_env->read_size,
4035 p_env->write_size, p_env->read_buffers,
4036 p_env->write_buffers, p_env->devno[READ],
4037 p_env->devno[WRITE]);
4038 printk(KERN_INFO "%s:host_name:%.8s, adapter_name "
4039 ":%.8s api_type: %.8s\n",
4040 dev->name, p_env->host_name,
4041 p_env->adapter_name , p_env->api_type);
4042 return 0;
4043 out:
4044 ccw_device_set_offline(cgdev->cdev[1]);
4045 ccw_device_set_offline(cgdev->cdev[0]);
4046
4047 return -ENODEV;
4048 }
4049
4050 static void
4051 claw_purge_skb_queue(struct sk_buff_head *q)
4052 {
4053 struct sk_buff *skb;
4054
4055 CLAW_DBF_TEXT(4,trace,"purgque");
4056
4057 while ((skb = skb_dequeue(q))) {
4058 atomic_dec(&skb->users);
4059 dev_kfree_skb_any(skb);
4060 }
4061 }
4062
4063 /**
4064 * Shutdown an interface.
4065 *
4066 * @param cgdev Device to be shut down.
4067 *
4068 * @returns 0 on success, !0 on failure.
4069 */
4070 static int
4071 claw_shutdown_device(struct ccwgroup_device *cgdev)
4072 {
4073 struct claw_privbk *priv;
4074 struct net_device *ndev;
4075 int ret;
4076
4077 pr_debug("%s() called\n", __FUNCTION__);
4078 CLAW_DBF_TEXT_(2,setup,"%s",cgdev->dev.bus_id);
4079 priv = cgdev->dev.driver_data;
4080 if (!priv)
4081 return -ENODEV;
4082 ndev = priv->channel[READ].ndev;
4083 if (ndev) {
4084 /* Close the device */
4085 printk(KERN_INFO
4086 "%s: shuting down \n",ndev->name);
4087 if (ndev->flags & IFF_RUNNING)
4088 ret = claw_release(ndev);
4089 ndev->flags &=~IFF_RUNNING;
4090 unregister_netdev(ndev);
4091 ndev->priv = NULL; /* cgdev data, not ndev's to free */
4092 claw_free_netdevice(ndev, 1);
4093 priv->channel[READ].ndev = NULL;
4094 priv->channel[WRITE].ndev = NULL;
4095 priv->p_env->ndev = NULL;
4096 }
4097 ccw_device_set_offline(cgdev->cdev[1]);
4098 ccw_device_set_offline(cgdev->cdev[0]);
4099 return 0;
4100 }
4101
4102 static void
4103 claw_remove_device(struct ccwgroup_device *cgdev)
4104 {
4105 struct claw_privbk *priv;
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 printk(KERN_WARNING "claw: %s() no Priv exiting\n",__FUNCTION__);
4112 return;
4113 }
4114 printk(KERN_INFO "claw: %s() called %s will be removed.\n",
4115 __FUNCTION__,cgdev->cdev[0]->dev.bus_id);
4116 if (cgdev->state == CCWGROUP_ONLINE)
4117 claw_shutdown_device(cgdev);
4118 claw_remove_files(&cgdev->dev);
4119 kfree(priv->p_mtc_envelope);
4120 priv->p_mtc_envelope=NULL;
4121 kfree(priv->p_env);
4122 priv->p_env=NULL;
4123 kfree(priv->channel[0].irb);
4124 priv->channel[0].irb=NULL;
4125 kfree(priv->channel[1].irb);
4126 priv->channel[1].irb=NULL;
4127 kfree(priv);
4128 cgdev->dev.driver_data=NULL;
4129 cgdev->cdev[READ]->dev.driver_data = NULL;
4130 cgdev->cdev[WRITE]->dev.driver_data = NULL;
4131 put_device(&cgdev->dev);
4132 }
4133
4134
4135 /*
4136 * sysfs attributes
4137 */
4138 static ssize_t
4139 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
4140 {
4141 struct claw_privbk *priv;
4142 struct claw_env * p_env;
4143
4144 priv = dev->driver_data;
4145 if (!priv)
4146 return -ENODEV;
4147 p_env = priv->p_env;
4148 return sprintf(buf, "%s\n",p_env->host_name);
4149 }
4150
4151 static ssize_t
4152 claw_hname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4153 {
4154 struct claw_privbk *priv;
4155 struct claw_env * p_env;
4156
4157 priv = dev->driver_data;
4158 if (!priv)
4159 return -ENODEV;
4160 p_env = priv->p_env;
4161 if (count > MAX_NAME_LEN+1)
4162 return -EINVAL;
4163 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
4164 strncpy(p_env->host_name,buf, count);
4165 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
4166 p_env->host_name[MAX_NAME_LEN] = 0x00;
4167 CLAW_DBF_TEXT(2,setup,"HstnSet");
4168 CLAW_DBF_TEXT_(2,setup,"%s",p_env->host_name);
4169
4170 return count;
4171 }
4172
4173 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
4174
4175 static ssize_t
4176 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
4177 {
4178 struct claw_privbk *priv;
4179 struct claw_env * p_env;
4180
4181 priv = dev->driver_data;
4182 if (!priv)
4183 return -ENODEV;
4184 p_env = priv->p_env;
4185 return sprintf(buf, "%s\n",p_env->adapter_name);
4186 }
4187
4188 static ssize_t
4189 claw_adname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4190 {
4191 struct claw_privbk *priv;
4192 struct claw_env * p_env;
4193
4194 priv = dev->driver_data;
4195 if (!priv)
4196 return -ENODEV;
4197 p_env = priv->p_env;
4198 if (count > MAX_NAME_LEN+1)
4199 return -EINVAL;
4200 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
4201 strncpy(p_env->adapter_name,buf, count);
4202 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
4203 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
4204 CLAW_DBF_TEXT(2,setup,"AdnSet");
4205 CLAW_DBF_TEXT_(2,setup,"%s",p_env->adapter_name);
4206
4207 return count;
4208 }
4209
4210 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
4211
4212 static ssize_t
4213 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
4214 {
4215 struct claw_privbk *priv;
4216 struct claw_env * p_env;
4217
4218 priv = dev->driver_data;
4219 if (!priv)
4220 return -ENODEV;
4221 p_env = priv->p_env;
4222 return sprintf(buf, "%s\n",
4223 p_env->api_type);
4224 }
4225
4226 static ssize_t
4227 claw_apname_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4228 {
4229 struct claw_privbk *priv;
4230 struct claw_env * p_env;
4231
4232 priv = dev->driver_data;
4233 if (!priv)
4234 return -ENODEV;
4235 p_env = priv->p_env;
4236 if (count > MAX_NAME_LEN+1)
4237 return -EINVAL;
4238 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
4239 strncpy(p_env->api_type,buf, count);
4240 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
4241 p_env->api_type[MAX_NAME_LEN] = 0x00;
4242 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
4243 p_env->read_size=DEF_PACK_BUFSIZE;
4244 p_env->write_size=DEF_PACK_BUFSIZE;
4245 p_env->packing=PACKING_ASK;
4246 CLAW_DBF_TEXT(2,setup,"PACKING");
4247 }
4248 else {
4249 p_env->packing=0;
4250 p_env->read_size=CLAW_FRAME_SIZE;
4251 p_env->write_size=CLAW_FRAME_SIZE;
4252 CLAW_DBF_TEXT(2,setup,"ApiSet");
4253 }
4254 CLAW_DBF_TEXT_(2,setup,"%s",p_env->api_type);
4255 return count;
4256 }
4257
4258 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
4259
4260 static ssize_t
4261 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4262 {
4263 struct claw_privbk *priv;
4264 struct claw_env * p_env;
4265
4266 priv = dev->driver_data;
4267 if (!priv)
4268 return -ENODEV;
4269 p_env = priv->p_env;
4270 return sprintf(buf, "%d\n", p_env->write_buffers);
4271 }
4272
4273 static ssize_t
4274 claw_wbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4275 {
4276 struct claw_privbk *priv;
4277 struct claw_env * p_env;
4278 int nnn,max;
4279
4280 priv = dev->driver_data;
4281 if (!priv)
4282 return -ENODEV;
4283 p_env = priv->p_env;
4284 sscanf(buf, "%i", &nnn);
4285 if (p_env->packing) {
4286 max = 64;
4287 }
4288 else {
4289 max = 512;
4290 }
4291 if ((nnn > max ) || (nnn < 2))
4292 return -EINVAL;
4293 p_env->write_buffers = nnn;
4294 CLAW_DBF_TEXT(2,setup,"Wbufset");
4295 CLAW_DBF_TEXT_(2,setup,"WB=%d",p_env->write_buffers);
4296 return count;
4297 }
4298
4299 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
4300
4301 static ssize_t
4302 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
4303 {
4304 struct claw_privbk *priv;
4305 struct claw_env * p_env;
4306
4307 priv = dev->driver_data;
4308 if (!priv)
4309 return -ENODEV;
4310 p_env = priv->p_env;
4311 return sprintf(buf, "%d\n", p_env->read_buffers);
4312 }
4313
4314 static ssize_t
4315 claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
4316 {
4317 struct claw_privbk *priv;
4318 struct claw_env *p_env;
4319 int nnn,max;
4320
4321 priv = dev->driver_data;
4322 if (!priv)
4323 return -ENODEV;
4324 p_env = priv->p_env;
4325 sscanf(buf, "%i", &nnn);
4326 if (p_env->packing) {
4327 max = 64;
4328 }
4329 else {
4330 max = 512;
4331 }
4332 if ((nnn > max ) || (nnn < 2))
4333 return -EINVAL;
4334 p_env->read_buffers = nnn;
4335 CLAW_DBF_TEXT(2,setup,"Rbufset");
4336 CLAW_DBF_TEXT_(2,setup,"RB=%d",p_env->read_buffers);
4337 return count;
4338 }
4339
4340 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
4341
4342 static struct attribute *claw_attr[] = {
4343 &dev_attr_read_buffer.attr,
4344 &dev_attr_write_buffer.attr,
4345 &dev_attr_adapter_name.attr,
4346 &dev_attr_api_type.attr,
4347 &dev_attr_host_name.attr,
4348 NULL,
4349 };
4350
4351 static struct attribute_group claw_attr_group = {
4352 .attrs = claw_attr,
4353 };
4354
4355 static int
4356 claw_add_files(struct device *dev)
4357 {
4358 pr_debug("%s() called\n", __FUNCTION__);
4359 CLAW_DBF_TEXT(2,setup,"add_file");
4360 return sysfs_create_group(&dev->kobj, &claw_attr_group);
4361 }
4362
4363 static void
4364 claw_remove_files(struct device *dev)
4365 {
4366 pr_debug("%s() called\n", __FUNCTION__);
4367 CLAW_DBF_TEXT(2,setup,"rem_file");
4368 sysfs_remove_group(&dev->kobj, &claw_attr_group);
4369 }
4370
4371 /*--------------------------------------------------------------------*
4372 * claw_init and cleanup *
4373 *---------------------------------------------------------------------*/
4374
4375 static void __exit
4376 claw_cleanup(void)
4377 {
4378 unregister_cu3088_discipline(&claw_group_driver);
4379 claw_unregister_debug_facility();
4380 printk(KERN_INFO "claw: Driver unloaded\n");
4381
4382 }
4383
4384 /**
4385 * Initialize module.
4386 * This is called just after the module is loaded.
4387 *
4388 * @return 0 on success, !0 on error.
4389 */
4390 static int __init
4391 claw_init(void)
4392 {
4393 int ret = 0;
4394 printk(KERN_INFO "claw: starting driver "
4395 #ifdef MODULE
4396 "module "
4397 #else
4398 "compiled into kernel "
4399 #endif
4400 " $Revision: 1.38 $ $Date: 2005/08/29 09:47:04 $ \n");
4401
4402
4403 #ifdef FUNCTRACE
4404 printk(KERN_INFO "claw: %s() enter \n",__FUNCTION__);
4405 #endif
4406 ret = claw_register_debug_facility();
4407 if (ret) {
4408 printk(KERN_WARNING "claw: %s() debug_register failed %d\n",
4409 __FUNCTION__,ret);
4410 return ret;
4411 }
4412 CLAW_DBF_TEXT(2,setup,"init_mod");
4413 ret = register_cu3088_discipline(&claw_group_driver);
4414 if (ret) {
4415 claw_unregister_debug_facility();
4416 printk(KERN_WARNING "claw; %s() cu3088 register failed %d\n",
4417 __FUNCTION__,ret);
4418 }
4419 #ifdef FUNCTRACE
4420 printk(KERN_INFO "claw: %s() exit \n",__FUNCTION__);
4421 #endif
4422 return ret;
4423 }
4424
4425 module_init(claw_init);
4426 module_exit(claw_cleanup);
4427
4428
4429
4430 /*--------------------------------------------------------------------*
4431 * End of File *
4432 *---------------------------------------------------------------------*/
4433
4434
Linux kernel - Deliverables
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