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kmsg: convert claw printk messages
[linux-2.6.git] / drivers / s390 / net / claw.c
blob6669adf355befa399496f26bcd15f12018a82eee
1 /*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
5 * Linux for zSeries version
6 * Copyright (C) 2002,2005 IBM Corporation
7 * Author(s) Original code written by:
8 * Kazuo Iimura (iimura@jp.ibm.com)
9 * Rewritten by
10 * Andy Richter (richtera@us.ibm.com)
11 * Marc Price (mwprice@us.ibm.com)
12 *
13 * sysfs parms:
14 * group x.x.rrrr,x.x.wwww
15 * read_buffer nnnnnnn
16 * write_buffer nnnnnn
17 * host_name aaaaaaaa
18 * adapter_name aaaaaaaa
19 * api_type aaaaaaaa
20 *
21 * eg.
22 * group 0.0.0200 0.0.0201
23 * read_buffer 25
24 * write_buffer 20
25 * host_name LINUX390
26 * adapter_name RS6K
27 * api_type TCPIP
28 *
29 * where
30 *
31 * The device id is decided by the order entries
32 * are added to the group the first is claw0 the second claw1
33 * up to CLAW_MAX_DEV
34 *
35 * rrrr - the first of 2 consecutive device addresses used for the
36 * CLAW protocol.
37 * The specified address is always used as the input (Read)
38 * channel and the next address is used as the output channel.
39 *
40 * wwww - the second of 2 consecutive device addresses used for
41 * the CLAW protocol.
42 * The specified address is always used as the output
43 * channel and the previous address is used as the input channel.
44 *
45 * read_buffer - specifies number of input buffers to allocate.
46 * write_buffer - specifies number of output buffers to allocate.
47 * host_name - host name
48 * adaptor_name - adaptor name
49 * api_type - API type TCPIP or API will be sent and expected
50 * as ws_name
51 *
52 * Note the following requirements:
53 * 1) host_name must match the configured adapter_name on the remote side
54 * 2) adaptor_name must match the configured host name on the remote side
55 *
56 * Change History
57 * 1.00 Initial release shipped
58 * 1.10 Changes for Buffer allocation
59 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
60 * 1.25 Added Packing support
61 * 1.5
62 */
63
64 #define KMSG_COMPONENT "claw"
65
66 #include <asm/ccwdev.h>
67 #include <asm/ccwgroup.h>
68 #include <asm/debug.h>
69 #include <asm/idals.h>
70 #include <asm/io.h>
71 #include <linux/bitops.h>
72 #include <linux/ctype.h>
73 #include <linux/delay.h>
74 #include <linux/errno.h>
75 #include <linux/if_arp.h>
76 #include <linux/init.h>
77 #include <linux/interrupt.h>
78 #include <linux/ip.h>
79 #include <linux/kernel.h>
80 #include <linux/module.h>
81 #include <linux/netdevice.h>
82 #include <linux/etherdevice.h>
83 #include <linux/proc_fs.h>
84 #include <linux/sched.h>
85 #include <linux/signal.h>
86 #include <linux/skbuff.h>
87 #include <linux/slab.h>
88 #include <linux/string.h>
89 #include <linux/tcp.h>
90 #include <linux/timer.h>
91 #include <linux/types.h>
92
93 #include "cu3088.h"
94 #include "claw.h"
95
96 /*
97 CLAW uses the s390dbf file system see claw_trace and claw_setup
98 */
99
100 static char version[] __initdata = "CLAW driver";
101 static char debug_buffer[255];
102 /**
103 * Debug Facility Stuff
104 */
105 static debug_info_t *claw_dbf_setup;
106 static debug_info_t *claw_dbf_trace;
107
108 /**
109 * CLAW Debug Facility functions
110 */
111 static void
112 claw_unregister_debug_facility(void)
113 {
114 if (claw_dbf_setup)
115 debug_unregister(claw_dbf_setup);
116 if (claw_dbf_trace)
117 debug_unregister(claw_dbf_trace);
118 }
119
120 static int
121 claw_register_debug_facility(void)
122 {
123 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
124 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
125 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
126 claw_unregister_debug_facility();
127 return -ENOMEM;
128 }
129 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
130 debug_set_level(claw_dbf_setup, 2);
131 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
132 debug_set_level(claw_dbf_trace, 2);
133 return 0;
134 }
135
136 static inline void
137 claw_set_busy(struct net_device *dev)
138 {
139 ((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
140 eieio();
141 }
142
143 static inline void
144 claw_clear_busy(struct net_device *dev)
145 {
146 clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
147 netif_wake_queue(dev);
148 eieio();
149 }
150
151 static inline int
152 claw_check_busy(struct net_device *dev)
153 {
154 eieio();
155 return ((struct claw_privbk *) dev->ml_priv)->tbusy;
156 }
157
158 static inline void
159 claw_setbit_busy(int nr,struct net_device *dev)
160 {
161 netif_stop_queue(dev);
162 set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
163 }
164
165 static inline void
166 claw_clearbit_busy(int nr,struct net_device *dev)
167 {
168 clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
169 netif_wake_queue(dev);
170 }
171
172 static inline int
173 claw_test_and_setbit_busy(int nr,struct net_device *dev)
174 {
175 netif_stop_queue(dev);
176 return test_and_set_bit(nr,
177 (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy));
178 }
179
180
181 /* Functions for the DEV methods */
182
183 static int claw_probe(struct ccwgroup_device *cgdev);
184 static void claw_remove_device(struct ccwgroup_device *cgdev);
185 static void claw_purge_skb_queue(struct sk_buff_head *q);
186 static int claw_new_device(struct ccwgroup_device *cgdev);
187 static int claw_shutdown_device(struct ccwgroup_device *cgdev);
188 static int claw_tx(struct sk_buff *skb, struct net_device *dev);
189 static int claw_change_mtu( struct net_device *dev, int new_mtu);
190 static int claw_open(struct net_device *dev);
191 static void claw_irq_handler(struct ccw_device *cdev,
192 unsigned long intparm, struct irb *irb);
193 static void claw_irq_tasklet ( unsigned long data );
194 static int claw_release(struct net_device *dev);
195 static void claw_write_retry ( struct chbk * p_ch );
196 static void claw_write_next ( struct chbk * p_ch );
197 static void claw_timer ( struct chbk * p_ch );
198
199 /* Functions */
200 static int add_claw_reads(struct net_device *dev,
201 struct ccwbk* p_first, struct ccwbk* p_last);
202 static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
203 static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
204 static int find_link(struct net_device *dev, char *host_name, char *ws_name );
205 static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
206 static int init_ccw_bk(struct net_device *dev);
207 static void probe_error( struct ccwgroup_device *cgdev);
208 static struct net_device_stats *claw_stats(struct net_device *dev);
209 static int pages_to_order_of_mag(int num_of_pages);
210 static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
211 /* sysfs Functions */
212 static ssize_t claw_hname_show(struct device *dev,
213 struct device_attribute *attr, char *buf);
214 static ssize_t claw_hname_write(struct device *dev,
215 struct device_attribute *attr,
216 const char *buf, size_t count);
217 static ssize_t claw_adname_show(struct device *dev,
218 struct device_attribute *attr, char *buf);
219 static ssize_t claw_adname_write(struct device *dev,
220 struct device_attribute *attr,
221 const char *buf, size_t count);
222 static ssize_t claw_apname_show(struct device *dev,
223 struct device_attribute *attr, char *buf);
224 static ssize_t claw_apname_write(struct device *dev,
225 struct device_attribute *attr,
226 const char *buf, size_t count);
227 static ssize_t claw_wbuff_show(struct device *dev,
228 struct device_attribute *attr, char *buf);
229 static ssize_t claw_wbuff_write(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count);
232 static ssize_t claw_rbuff_show(struct device *dev,
233 struct device_attribute *attr, char *buf);
234 static ssize_t claw_rbuff_write(struct device *dev,
235 struct device_attribute *attr,
236 const char *buf, size_t count);
237 static int claw_add_files(struct device *dev);
238 static void claw_remove_files(struct device *dev);
239
240 /* Functions for System Validate */
241 static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
242 static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
243 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
244 static int claw_snd_conn_req(struct net_device *dev, __u8 link);
245 static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
246 static int claw_snd_sys_validate_rsp(struct net_device *dev,
247 struct clawctl * p_ctl, __u32 return_code);
248 static int claw_strt_conn_req(struct net_device *dev );
249 static void claw_strt_read(struct net_device *dev, int lock);
250 static void claw_strt_out_IO(struct net_device *dev);
251 static void claw_free_wrt_buf(struct net_device *dev);
252
253 /* Functions for unpack reads */
254 static void unpack_read(struct net_device *dev);
255
256 /* ccwgroup table */
257
258 static struct ccwgroup_driver claw_group_driver = {
259 .owner = THIS_MODULE,
260 .name = "claw",
261 .max_slaves = 2,
262 .driver_id = 0xC3D3C1E6,
263 .probe = claw_probe,
264 .remove = claw_remove_device,
265 .set_online = claw_new_device,
266 .set_offline = claw_shutdown_device,
267 };
268
269 /*
270 * Key functions
271 */
272
273 /*----------------------------------------------------------------*
274 * claw_probe *
275 * this function is called for each CLAW device. *
276 *----------------------------------------------------------------*/
277 static int
278 claw_probe(struct ccwgroup_device *cgdev)
279 {
280 int rc;
281 struct claw_privbk *privptr=NULL;
282
283 CLAW_DBF_TEXT(2, setup, "probe");
284 if (!get_device(&cgdev->dev))
285 return -ENODEV;
286 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
287 cgdev->dev.driver_data = privptr;
288 if (privptr == NULL) {
289 probe_error(cgdev);
290 put_device(&cgdev->dev);
291 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
292 return -ENOMEM;
293 }
294 privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
295 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
296 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
297 probe_error(cgdev);
298 put_device(&cgdev->dev);
299 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
300 return -ENOMEM;
301 }
302 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
303 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
304 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
305 privptr->p_env->packing = 0;
306 privptr->p_env->write_buffers = 5;
307 privptr->p_env->read_buffers = 5;
308 privptr->p_env->read_size = CLAW_FRAME_SIZE;
309 privptr->p_env->write_size = CLAW_FRAME_SIZE;
310 rc = claw_add_files(&cgdev->dev);
311 if (rc) {
312 probe_error(cgdev);
313 put_device(&cgdev->dev);
314 dev_err(&cgdev->dev, "Creating the /proc files for a new"
315 " CLAW device failed\n");
316 CLAW_DBF_TEXT_(2, setup, "probex%d", rc);
317 return rc;
318 }
319 privptr->p_env->p_priv = privptr;
320 cgdev->cdev[0]->handler = claw_irq_handler;
321 cgdev->cdev[1]->handler = claw_irq_handler;
322 CLAW_DBF_TEXT(2, setup, "prbext 0");
323
324 return 0;
325 } /* end of claw_probe */
326
327 /*-------------------------------------------------------------------*
328 * claw_tx *
329 *-------------------------------------------------------------------*/
330
331 static int
332 claw_tx(struct sk_buff *skb, struct net_device *dev)
333 {
334 int rc;
335 struct claw_privbk *privptr = dev->ml_priv;
336 unsigned long saveflags;
337 struct chbk *p_ch;
338
339 CLAW_DBF_TEXT(4, trace, "claw_tx");
340 p_ch=&privptr->channel[WRITE];
341 if (skb == NULL) {
342 privptr->stats.tx_dropped++;
343 privptr->stats.tx_errors++;
344 CLAW_DBF_TEXT_(2, trace, "clawtx%d", -EIO);
345 return -EIO;
346 }
347 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
348 rc=claw_hw_tx( skb, dev, 1 );
349 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
350 CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
351 return rc;
352 } /* end of claw_tx */
353
354 /*------------------------------------------------------------------*
355 * pack the collect queue into an skb and return it *
356 * If not packing just return the top skb from the queue *
357 *------------------------------------------------------------------*/
358
359 static struct sk_buff *
360 claw_pack_skb(struct claw_privbk *privptr)
361 {
362 struct sk_buff *new_skb,*held_skb;
363 struct chbk *p_ch = &privptr->channel[WRITE];
364 struct claw_env *p_env = privptr->p_env;
365 int pkt_cnt,pk_ind,so_far;
366
367 new_skb = NULL; /* assume no dice */
368 pkt_cnt = 0;
369 CLAW_DBF_TEXT(4, trace, "PackSKBe");
370 if (!skb_queue_empty(&p_ch->collect_queue)) {
371 /* some data */
372 held_skb = skb_dequeue(&p_ch->collect_queue);
373 if (held_skb)
374 dev_kfree_skb_any(held_skb);
375 else
376 return NULL;
377 if (p_env->packing != DO_PACKED)
378 return held_skb;
379 /* get a new SKB we will pack at least one */
380 new_skb = dev_alloc_skb(p_env->write_size);
381 if (new_skb == NULL) {
382 atomic_inc(&held_skb->users);
383 skb_queue_head(&p_ch->collect_queue,held_skb);
384 return NULL;
385 }
386 /* we have packed packet and a place to put it */
387 pk_ind = 1;
388 so_far = 0;
389 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
390 while ((pk_ind) && (held_skb != NULL)) {
391 if (held_skb->len+so_far <= p_env->write_size-8) {
392 memcpy(skb_put(new_skb,held_skb->len),
393 held_skb->data,held_skb->len);
394 privptr->stats.tx_packets++;
395 so_far += held_skb->len;
396 pkt_cnt++;
397 dev_kfree_skb_any(held_skb);
398 held_skb = skb_dequeue(&p_ch->collect_queue);
399 if (held_skb)
400 atomic_dec(&held_skb->users);
401 } else {
402 pk_ind = 0;
403 atomic_inc(&held_skb->users);
404 skb_queue_head(&p_ch->collect_queue,held_skb);
405 }
406 }
407 }
408 CLAW_DBF_TEXT(4, trace, "PackSKBx");
409 return new_skb;
410 }
411
412 /*-------------------------------------------------------------------*
413 * claw_change_mtu *
414 * *
415 *-------------------------------------------------------------------*/
416
417 static int
418 claw_change_mtu(struct net_device *dev, int new_mtu)
419 {
420 struct claw_privbk *privptr = dev->ml_priv;
421 int buff_size;
422 CLAW_DBF_TEXT(4, trace, "setmtu");
423 buff_size = privptr->p_env->write_size;
424 if ((new_mtu < 60) || (new_mtu > buff_size)) {
425 return -EINVAL;
426 }
427 dev->mtu = new_mtu;
428 return 0;
429 } /* end of claw_change_mtu */
430
431
432 /*-------------------------------------------------------------------*
433 * claw_open *
434 * *
435 *-------------------------------------------------------------------*/
436 static int
437 claw_open(struct net_device *dev)
438 {
439
440 int rc;
441 int i;
442 unsigned long saveflags=0;
443 unsigned long parm;
444 struct claw_privbk *privptr;
445 DECLARE_WAITQUEUE(wait, current);
446 struct timer_list timer;
447 struct ccwbk *p_buf;
448
449 CLAW_DBF_TEXT(4, trace, "open");
450 privptr = (struct claw_privbk *)dev->ml_priv;
451 /* allocate and initialize CCW blocks */
452 if (privptr->buffs_alloc == 0) {
453 rc=init_ccw_bk(dev);
454 if (rc) {
455 CLAW_DBF_TEXT(2, trace, "openmem");
456 return -ENOMEM;
457 }
458 }
459 privptr->system_validate_comp=0;
460 privptr->release_pend=0;
461 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
462 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
463 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
464 privptr->p_env->packing=PACKING_ASK;
465 } else {
466 privptr->p_env->packing=0;
467 privptr->p_env->read_size=CLAW_FRAME_SIZE;
468 privptr->p_env->write_size=CLAW_FRAME_SIZE;
469 }
470 claw_set_busy(dev);
471 tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
472 (unsigned long) &privptr->channel[READ]);
473 for ( i = 0; i < 2; i++) {
474 CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
475 init_waitqueue_head(&privptr->channel[i].wait);
476 /* skb_queue_head_init(&p_ch->io_queue); */
477 if (i == WRITE)
478 skb_queue_head_init(
479 &privptr->channel[WRITE].collect_queue);
480 privptr->channel[i].flag_a = 0;
481 privptr->channel[i].IO_active = 0;
482 privptr->channel[i].flag &= ~CLAW_TIMER;
483 init_timer(&timer);
484 timer.function = (void *)claw_timer;
485 timer.data = (unsigned long)(&privptr->channel[i]);
486 timer.expires = jiffies + 15*HZ;
487 add_timer(&timer);
488 spin_lock_irqsave(get_ccwdev_lock(
489 privptr->channel[i].cdev), saveflags);
490 parm = (unsigned long) &privptr->channel[i];
491 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
492 rc = 0;
493 add_wait_queue(&privptr->channel[i].wait, &wait);
494 rc = ccw_device_halt(
495 (struct ccw_device *)privptr->channel[i].cdev,parm);
496 set_current_state(TASK_INTERRUPTIBLE);
497 spin_unlock_irqrestore(
498 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
499 schedule();
500 set_current_state(TASK_RUNNING);
501 remove_wait_queue(&privptr->channel[i].wait, &wait);
502 if(rc != 0)
503 ccw_check_return_code(privptr->channel[i].cdev, rc);
504 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
505 del_timer(&timer);
506 }
507 if ((((privptr->channel[READ].last_dstat |
508 privptr->channel[WRITE].last_dstat) &
509 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
510 (((privptr->channel[READ].flag |
511 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
512 dev_info(&privptr->channel[READ].cdev->dev,
513 "%s: remote side is not ready\n", dev->name);
514 CLAW_DBF_TEXT(2, trace, "notrdy");
515
516 for ( i = 0; i < 2; i++) {
517 spin_lock_irqsave(
518 get_ccwdev_lock(privptr->channel[i].cdev),
519 saveflags);
520 parm = (unsigned long) &privptr->channel[i];
521 privptr->channel[i].claw_state = CLAW_STOP;
522 rc = ccw_device_halt(
523 (struct ccw_device *)&privptr->channel[i].cdev,
524 parm);
525 spin_unlock_irqrestore(
526 get_ccwdev_lock(privptr->channel[i].cdev),
527 saveflags);
528 if (rc != 0) {
529 ccw_check_return_code(
530 privptr->channel[i].cdev, rc);
531 }
532 }
533 free_pages((unsigned long)privptr->p_buff_ccw,
534 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
535 if (privptr->p_env->read_size < PAGE_SIZE) {
536 free_pages((unsigned long)privptr->p_buff_read,
537 (int)pages_to_order_of_mag(
538 privptr->p_buff_read_num));
539 }
540 else {
541 p_buf=privptr->p_read_active_first;
542 while (p_buf!=NULL) {
543 free_pages((unsigned long)p_buf->p_buffer,
544 (int)pages_to_order_of_mag(
545 privptr->p_buff_pages_perread ));
546 p_buf=p_buf->next;
547 }
548 }
549 if (privptr->p_env->write_size < PAGE_SIZE ) {
550 free_pages((unsigned long)privptr->p_buff_write,
551 (int)pages_to_order_of_mag(
552 privptr->p_buff_write_num));
553 }
554 else {
555 p_buf=privptr->p_write_active_first;
556 while (p_buf!=NULL) {
557 free_pages((unsigned long)p_buf->p_buffer,
558 (int)pages_to_order_of_mag(
559 privptr->p_buff_pages_perwrite ));
560 p_buf=p_buf->next;
561 }
562 }
563 privptr->buffs_alloc = 0;
564 privptr->channel[READ].flag= 0x00;
565 privptr->channel[WRITE].flag = 0x00;
566 privptr->p_buff_ccw=NULL;
567 privptr->p_buff_read=NULL;
568 privptr->p_buff_write=NULL;
569 claw_clear_busy(dev);
570 CLAW_DBF_TEXT(2, trace, "open EIO");
571 return -EIO;
572 }
573
574 /* Send SystemValidate command */
575
576 claw_clear_busy(dev);
577 CLAW_DBF_TEXT(4, trace, "openok");
578 return 0;
579 } /* end of claw_open */
580
581 /*-------------------------------------------------------------------*
582 * *
583 * claw_irq_handler *
584 * *
585 *--------------------------------------------------------------------*/
586 static void
587 claw_irq_handler(struct ccw_device *cdev,
588 unsigned long intparm, struct irb *irb)
589 {
590 struct chbk *p_ch = NULL;
591 struct claw_privbk *privptr = NULL;
592 struct net_device *dev = NULL;
593 struct claw_env *p_env;
594 struct chbk *p_ch_r=NULL;
595
596 CLAW_DBF_TEXT(4, trace, "clawirq");
597 /* Bypass all 'unsolicited interrupts' */
598 if (!cdev->dev.driver_data) {
599 dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
600 " IRQ, c-%02x d-%02x\n",
601 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
602 CLAW_DBF_TEXT(2, trace, "badirq");
603 return;
604 }
605 privptr = (struct claw_privbk *)cdev->dev.driver_data;
606
607 /* Try to extract channel from driver data. */
608 if (privptr->channel[READ].cdev == cdev)
609 p_ch = &privptr->channel[READ];
610 else if (privptr->channel[WRITE].cdev == cdev)
611 p_ch = &privptr->channel[WRITE];
612 else {
613 dev_warn(&cdev->dev, "The device is not a CLAW device\n");
614 CLAW_DBF_TEXT(2, trace, "badchan");
615 return;
616 }
617 CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
618
619 dev = (struct net_device *) (p_ch->ndev);
620 p_env=privptr->p_env;
621
622 /* Copy interruption response block. */
623 memcpy(p_ch->irb, irb, sizeof(struct irb));
624
625 /* Check for good subchannel return code, otherwise info message */
626 if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
627 dev_info(&cdev->dev,
628 "%s: subchannel check for device: %04x -"
629 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
630 dev->name, p_ch->devno,
631 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
632 irb->scsw.cmd.cpa);
633 CLAW_DBF_TEXT(2, trace, "chanchk");
634 /* return; */
635 }
636
637 /* Check the reason-code of a unit check */
638 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
639 ccw_check_unit_check(p_ch, irb->ecw[0]);
640
641 /* State machine to bring the connection up, down and to restart */
642 p_ch->last_dstat = irb->scsw.cmd.dstat;
643
644 switch (p_ch->claw_state) {
645 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
646 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
647 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
648 (p_ch->irb->scsw.cmd.stctl ==
649 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
650 return;
651 wake_up(&p_ch->wait); /* wake up claw_release */
652 CLAW_DBF_TEXT(4, trace, "stop");
653 return;
654 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
655 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
656 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
657 (p_ch->irb->scsw.cmd.stctl ==
658 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
659 CLAW_DBF_TEXT(4, trace, "haltio");
660 return;
661 }
662 if (p_ch->flag == CLAW_READ) {
663 p_ch->claw_state = CLAW_START_READ;
664 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
665 } else if (p_ch->flag == CLAW_WRITE) {
666 p_ch->claw_state = CLAW_START_WRITE;
667 /* send SYSTEM_VALIDATE */
668 claw_strt_read(dev, LOCK_NO);
669 claw_send_control(dev,
670 SYSTEM_VALIDATE_REQUEST,
671 0, 0, 0,
672 p_env->host_name,
673 p_env->adapter_name);
674 } else {
675 dev_warn(&cdev->dev, "The CLAW device received"
676 " an unexpected IRQ, "
677 "c-%02x d-%02x\n",
678 irb->scsw.cmd.cstat,
679 irb->scsw.cmd.dstat);
680 return;
681 }
682 CLAW_DBF_TEXT(4, trace, "haltio");
683 return;
684 case CLAW_START_READ:
685 CLAW_DBF_TEXT(4, trace, "ReadIRQ");
686 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
687 clear_bit(0, (void *)&p_ch->IO_active);
688 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
689 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
690 (p_ch->irb->ecw[0]) == 0) {
691 privptr->stats.rx_errors++;
692 dev_info(&cdev->dev,
693 "%s: Restart is required after remote "
694 "side recovers \n",
695 dev->name);
696 }
697 CLAW_DBF_TEXT(4, trace, "notrdy");
698 return;
699 }
700 if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
701 (p_ch->irb->scsw.cmd.dstat == 0)) {
702 if (test_and_set_bit(CLAW_BH_ACTIVE,
703 (void *)&p_ch->flag_a) == 0)
704 tasklet_schedule(&p_ch->tasklet);
705 else
706 CLAW_DBF_TEXT(4, trace, "PCINoBH");
707 CLAW_DBF_TEXT(4, trace, "PCI_read");
708 return;
709 }
710 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
711 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
712 (p_ch->irb->scsw.cmd.stctl ==
713 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
714 CLAW_DBF_TEXT(4, trace, "SPend_rd");
715 return;
716 }
717 clear_bit(0, (void *)&p_ch->IO_active);
718 claw_clearbit_busy(TB_RETRY, dev);
719 if (test_and_set_bit(CLAW_BH_ACTIVE,
720 (void *)&p_ch->flag_a) == 0)
721 tasklet_schedule(&p_ch->tasklet);
722 else
723 CLAW_DBF_TEXT(4, trace, "RdBHAct");
724 CLAW_DBF_TEXT(4, trace, "RdIRQXit");
725 return;
726 case CLAW_START_WRITE:
727 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
728 dev_info(&cdev->dev,
729 "%s: Unit Check Occured in "
730 "write channel\n", dev->name);
731 clear_bit(0, (void *)&p_ch->IO_active);
732 if (p_ch->irb->ecw[0] & 0x80) {
733 dev_info(&cdev->dev,
734 "%s: Resetting Event "
735 "occurred:\n", dev->name);
736 init_timer(&p_ch->timer);
737 p_ch->timer.function =
738 (void *)claw_write_retry;
739 p_ch->timer.data = (unsigned long)p_ch;
740 p_ch->timer.expires = jiffies + 10*HZ;
741 add_timer(&p_ch->timer);
742 dev_info(&cdev->dev,
743 "%s: write connection "
744 "restarting\n", dev->name);
745 }
746 CLAW_DBF_TEXT(4, trace, "rstrtwrt");
747 return;
748 }
749 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
750 clear_bit(0, (void *)&p_ch->IO_active);
751 dev_info(&cdev->dev,
752 "%s: Unit Exception "
753 "occurred in write channel\n",
754 dev->name);
755 }
756 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
757 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
758 (p_ch->irb->scsw.cmd.stctl ==
759 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
760 CLAW_DBF_TEXT(4, trace, "writeUE");
761 return;
762 }
763 clear_bit(0, (void *)&p_ch->IO_active);
764 if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
765 claw_write_next(p_ch);
766 claw_clearbit_busy(TB_TX, dev);
767 claw_clear_busy(dev);
768 }
769 p_ch_r = (struct chbk *)&privptr->channel[READ];
770 if (test_and_set_bit(CLAW_BH_ACTIVE,
771 (void *)&p_ch_r->flag_a) == 0)
772 tasklet_schedule(&p_ch_r->tasklet);
773 CLAW_DBF_TEXT(4, trace, "StWtExit");
774 return;
775 default:
776 dev_warn(&cdev->dev,
777 "The CLAW device for %s received an unexpected IRQ\n",
778 dev->name);
779 CLAW_DBF_TEXT(2, trace, "badIRQ");
780 return;
781 }
782
783 } /* end of claw_irq_handler */
784
785
786 /*-------------------------------------------------------------------*
787 * claw_irq_tasklet *
788 * *
789 *--------------------------------------------------------------------*/
790 static void
791 claw_irq_tasklet ( unsigned long data )
792 {
793 struct chbk * p_ch;
794 struct net_device *dev;
795 struct claw_privbk * privptr;
796
797 p_ch = (struct chbk *) data;
798 dev = (struct net_device *)p_ch->ndev;
799 CLAW_DBF_TEXT(4, trace, "IRQtask");
800 privptr = (struct claw_privbk *)dev->ml_priv;
801 unpack_read(dev);
802 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
803 CLAW_DBF_TEXT(4, trace, "TskletXt");
804 return;
805 } /* end of claw_irq_bh */
806
807 /*-------------------------------------------------------------------*
808 * claw_release *
809 * *
810 *--------------------------------------------------------------------*/
811 static int
812 claw_release(struct net_device *dev)
813 {
814 int rc;
815 int i;
816 unsigned long saveflags;
817 unsigned long parm;
818 struct claw_privbk *privptr;
819 DECLARE_WAITQUEUE(wait, current);
820 struct ccwbk* p_this_ccw;
821 struct ccwbk* p_buf;
822
823 if (!dev)
824 return 0;
825 privptr = (struct claw_privbk *)dev->ml_priv;
826 if (!privptr)
827 return 0;
828 CLAW_DBF_TEXT(4, trace, "release");
829 privptr->release_pend=1;
830 claw_setbit_busy(TB_STOP,dev);
831 for ( i = 1; i >=0 ; i--) {
832 spin_lock_irqsave(
833 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
834 /* del_timer(&privptr->channel[READ].timer); */
835 privptr->channel[i].claw_state = CLAW_STOP;
836 privptr->channel[i].IO_active = 0;
837 parm = (unsigned long) &privptr->channel[i];
838 if (i == WRITE)
839 claw_purge_skb_queue(
840 &privptr->channel[WRITE].collect_queue);
841 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
842 if (privptr->system_validate_comp==0x00) /* never opened? */
843 init_waitqueue_head(&privptr->channel[i].wait);
844 add_wait_queue(&privptr->channel[i].wait, &wait);
845 set_current_state(TASK_INTERRUPTIBLE);
846 spin_unlock_irqrestore(
847 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
848 schedule();
849 set_current_state(TASK_RUNNING);
850 remove_wait_queue(&privptr->channel[i].wait, &wait);
851 if (rc != 0) {
852 ccw_check_return_code(privptr->channel[i].cdev, rc);
853 }
854 }
855 if (privptr->pk_skb != NULL) {
856 dev_kfree_skb_any(privptr->pk_skb);
857 privptr->pk_skb = NULL;
858 }
859 if(privptr->buffs_alloc != 1) {
860 CLAW_DBF_TEXT(4, trace, "none2fre");
861 return 0;
862 }
863 CLAW_DBF_TEXT(4, trace, "freebufs");
864 if (privptr->p_buff_ccw != NULL) {
865 free_pages((unsigned long)privptr->p_buff_ccw,
866 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
867 }
868 CLAW_DBF_TEXT(4, trace, "freeread");
869 if (privptr->p_env->read_size < PAGE_SIZE) {
870 if (privptr->p_buff_read != NULL) {
871 free_pages((unsigned long)privptr->p_buff_read,
872 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
873 }
874 }
875 else {
876 p_buf=privptr->p_read_active_first;
877 while (p_buf!=NULL) {
878 free_pages((unsigned long)p_buf->p_buffer,
879 (int)pages_to_order_of_mag(
880 privptr->p_buff_pages_perread ));
881 p_buf=p_buf->next;
882 }
883 }
884 CLAW_DBF_TEXT(4, trace, "freewrit");
885 if (privptr->p_env->write_size < PAGE_SIZE ) {
886 free_pages((unsigned long)privptr->p_buff_write,
887 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
888 }
889 else {
890 p_buf=privptr->p_write_active_first;
891 while (p_buf!=NULL) {
892 free_pages((unsigned long)p_buf->p_buffer,
893 (int)pages_to_order_of_mag(
894 privptr->p_buff_pages_perwrite ));
895 p_buf=p_buf->next;
896 }
897 }
898 CLAW_DBF_TEXT(4, trace, "clearptr");
899 privptr->buffs_alloc = 0;
900 privptr->p_buff_ccw=NULL;
901 privptr->p_buff_read=NULL;
902 privptr->p_buff_write=NULL;
903 privptr->system_validate_comp=0;
904 privptr->release_pend=0;
905 /* Remove any writes that were pending and reset all reads */
906 p_this_ccw=privptr->p_read_active_first;
907 while (p_this_ccw!=NULL) {
908 p_this_ccw->header.length=0xffff;
909 p_this_ccw->header.opcode=0xff;
910 p_this_ccw->header.flag=0x00;
911 p_this_ccw=p_this_ccw->next;
912 }
913
914 while (privptr->p_write_active_first!=NULL) {
915 p_this_ccw=privptr->p_write_active_first;
916 p_this_ccw->header.flag=CLAW_PENDING;
917 privptr->p_write_active_first=p_this_ccw->next;
918 p_this_ccw->next=privptr->p_write_free_chain;
919 privptr->p_write_free_chain=p_this_ccw;
920 ++privptr->write_free_count;
921 }
922 privptr->p_write_active_last=NULL;
923 privptr->mtc_logical_link = -1;
924 privptr->mtc_skipping = 1;
925 privptr->mtc_offset=0;
926
927 if (((privptr->channel[READ].last_dstat |
928 privptr->channel[WRITE].last_dstat) &
929 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
930 dev_warn(&privptr->channel[READ].cdev->dev,
931 "Deactivating %s completed with incorrect"
932 " subchannel status "
933 "(read %02x, write %02x)\n",
934 dev->name,
935 privptr->channel[READ].last_dstat,
936 privptr->channel[WRITE].last_dstat);
937 CLAW_DBF_TEXT(2, trace, "badclose");
938 }
939 CLAW_DBF_TEXT(4, trace, "rlsexit");
940 return 0;
941 } /* end of claw_release */
942
943 /*-------------------------------------------------------------------*
944 * claw_write_retry *
945 * *
946 *--------------------------------------------------------------------*/
947
948 static void
949 claw_write_retry ( struct chbk *p_ch )
950 {
951
952 struct net_device *dev=p_ch->ndev;
953
954 CLAW_DBF_TEXT(4, trace, "w_retry");
955 if (p_ch->claw_state == CLAW_STOP) {
956 return;
957 }
958 claw_strt_out_IO( dev );
959 CLAW_DBF_TEXT(4, trace, "rtry_xit");
960 return;
961 } /* end of claw_write_retry */
962
963
964 /*-------------------------------------------------------------------*
965 * claw_write_next *
966 * *
967 *--------------------------------------------------------------------*/
968
969 static void
970 claw_write_next ( struct chbk * p_ch )
971 {
972
973 struct net_device *dev;
974 struct claw_privbk *privptr=NULL;
975 struct sk_buff *pk_skb;
976 int rc;
977
978 CLAW_DBF_TEXT(4, trace, "claw_wrt");
979 if (p_ch->claw_state == CLAW_STOP)
980 return;
981 dev = (struct net_device *) p_ch->ndev;
982 privptr = (struct claw_privbk *) dev->ml_priv;
983 claw_free_wrt_buf( dev );
984 if ((privptr->write_free_count > 0) &&
985 !skb_queue_empty(&p_ch->collect_queue)) {
986 pk_skb = claw_pack_skb(privptr);
987 while (pk_skb != NULL) {
988 rc = claw_hw_tx( pk_skb, dev,1);
989 if (privptr->write_free_count > 0) {
990 pk_skb = claw_pack_skb(privptr);
991 } else
992 pk_skb = NULL;
993 }
994 }
995 if (privptr->p_write_active_first!=NULL) {
996 claw_strt_out_IO(dev);
997 }
998 return;
999 } /* end of claw_write_next */
1000
1001 /*-------------------------------------------------------------------*
1002 * *
1003 * claw_timer *
1004 *--------------------------------------------------------------------*/
1005
1006 static void
1007 claw_timer ( struct chbk * p_ch )
1008 {
1009 CLAW_DBF_TEXT(4, trace, "timer");
1010 p_ch->flag |= CLAW_TIMER;
1011 wake_up(&p_ch->wait);
1012 return;
1013 } /* end of claw_timer */
1014
1015 /*
1016 *
1017 * functions
1018 */
1019
1020
1021 /*-------------------------------------------------------------------*
1022 * *
1023 * pages_to_order_of_mag *
1024 * *
1025 * takes a number of pages from 1 to 512 and returns the *
1026 * log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1027 * of magnitude get_free_pages() has an upper order of 9 *
1028 *--------------------------------------------------------------------*/
1029
1030 static int
1031 pages_to_order_of_mag(int num_of_pages)
1032 {
1033 int order_of_mag=1; /* assume 2 pages */
1034 int nump=2;
1035
1036 CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
1037 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1038 /* 512 pages = 2Meg on 4k page systems */
1039 if (num_of_pages >= 512) {return 9; }
1040 /* we have two or more pages order is at least 1 */
1041 for (nump=2 ;nump <= 512;nump*=2) {
1042 if (num_of_pages <= nump)
1043 break;
1044 order_of_mag +=1;
1045 }
1046 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1047 CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1048 return order_of_mag;
1049 }
1050
1051 /*-------------------------------------------------------------------*
1052 * *
1053 * add_claw_reads *
1054 * *
1055 *--------------------------------------------------------------------*/
1056 static int
1057 add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1058 struct ccwbk* p_last)
1059 {
1060 struct claw_privbk *privptr;
1061 struct ccw1 temp_ccw;
1062 struct endccw * p_end;
1063 CLAW_DBF_TEXT(4, trace, "addreads");
1064 privptr = dev->ml_priv;
1065 p_end = privptr->p_end_ccw;
1066
1067 /* first CCW and last CCW contains a new set of read channel programs
1068 * to apend the running channel programs
1069 */
1070 if ( p_first==NULL) {
1071 CLAW_DBF_TEXT(4, trace, "addexit");
1072 return 0;
1073 }
1074
1075 /* set up ending CCW sequence for this segment */
1076 if (p_end->read1) {
1077 p_end->read1=0x00; /* second ending CCW is now active */
1078 /* reset ending CCWs and setup TIC CCWs */
1079 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1080 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1081 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1082 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1083 p_end->read2_nop2.cda=0;
1084 p_end->read2_nop2.count=1;
1085 }
1086 else {
1087 p_end->read1=0x01; /* first ending CCW is now active */
1088 /* reset ending CCWs and setup TIC CCWs */
1089 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1090 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1091 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1092 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1093 p_end->read1_nop2.cda=0;
1094 p_end->read1_nop2.count=1;
1095 }
1096
1097 if ( privptr-> p_read_active_first ==NULL ) {
1098 privptr->p_read_active_first = p_first; /* set new first */
1099 privptr->p_read_active_last = p_last; /* set new last */
1100 }
1101 else {
1102
1103 /* set up TIC ccw */
1104 temp_ccw.cda= (__u32)__pa(&p_first->read);
1105 temp_ccw.count=0;
1106 temp_ccw.flags=0;
1107 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1108
1109
1110 if (p_end->read1) {
1111
1112 /* first set of CCW's is chained to the new read */
1113 /* chain, so the second set is chained to the active chain. */
1114 /* Therefore modify the second set to point to the new */
1115 /* read chain set up TIC CCWs */
1116 /* make sure we update the CCW so channel doesn't fetch it */
1117 /* when it's only half done */
1118 memcpy( &p_end->read2_nop2, &temp_ccw ,
1119 sizeof(struct ccw1));
1120 privptr->p_read_active_last->r_TIC_1.cda=
1121 (__u32)__pa(&p_first->read);
1122 privptr->p_read_active_last->r_TIC_2.cda=
1123 (__u32)__pa(&p_first->read);
1124 }
1125 else {
1126 /* make sure we update the CCW so channel doesn't */
1127 /* fetch it when it is only half done */
1128 memcpy( &p_end->read1_nop2, &temp_ccw ,
1129 sizeof(struct ccw1));
1130 privptr->p_read_active_last->r_TIC_1.cda=
1131 (__u32)__pa(&p_first->read);
1132 privptr->p_read_active_last->r_TIC_2.cda=
1133 (__u32)__pa(&p_first->read);
1134 }
1135 /* chain in new set of blocks */
1136 privptr->p_read_active_last->next = p_first;
1137 privptr->p_read_active_last=p_last;
1138 } /* end of if ( privptr-> p_read_active_first ==NULL) */
1139 CLAW_DBF_TEXT(4, trace, "addexit");
1140 return 0;
1141 } /* end of add_claw_reads */
1142
1143 /*-------------------------------------------------------------------*
1144 * ccw_check_return_code *
1145 * *
1146 *-------------------------------------------------------------------*/
1147
1148 static void
1149 ccw_check_return_code(struct ccw_device *cdev, int return_code)
1150 {
1151 CLAW_DBF_TEXT(4, trace, "ccwret");
1152 if (return_code != 0) {
1153 switch (return_code) {
1154 case -EBUSY: /* BUSY is a transient state no action needed */
1155 break;
1156 case -ENODEV:
1157 dev_err(&cdev->dev, "The remote channel adapter is not"
1158 " available\n");
1159 break;
1160 case -EINVAL:
1161 dev_err(&cdev->dev,
1162 "The status of the remote channel adapter"
1163 " is not valid\n");
1164 break;
1165 default:
1166 dev_err(&cdev->dev, "The common device layer"
1167 " returned error code %d\n",
1168 return_code);
1169 }
1170 }
1171 CLAW_DBF_TEXT(4, trace, "ccwret");
1172 } /* end of ccw_check_return_code */
1173
1174 /*-------------------------------------------------------------------*
1175 * ccw_check_unit_check *
1176 *--------------------------------------------------------------------*/
1177
1178 static void
1179 ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1180 {
1181 struct net_device *ndev = p_ch->ndev;
1182 struct device *dev = &p_ch->cdev->dev;
1183
1184 CLAW_DBF_TEXT(4, trace, "unitchek");
1185 dev_warn(dev, "The communication peer of %s disconnected\n",
1186 ndev->name);
1187
1188 if (sense & 0x40) {
1189 if (sense & 0x01) {
1190 dev_warn(dev, "The remote channel adapter for"
1191 " %s has been reset\n",
1192 ndev->name);
1193 }
1194 }
1195 else if (sense & 0x20) {
1196 if (sense & 0x04) {
1197 dev_warn(dev, "A data streaming timeout occurred"
1198 " for %s\n",
1199 ndev->name);
1200 }
1201 else {
1202 dev_warn(dev, "A data transfer parity error occurred"
1203 " for %s\n",
1204 ndev->name);
1205 }
1206 }
1207 else if (sense & 0x10) {
1208 if (sense & 0x20) {
1209 dev_warn(dev, "The remote channel adapter for %s"
1210 " is faulty\n",
1211 ndev->name);
1212 }
1213 else {
1214 dev_warn(dev, "A read data parity error occurred"
1215 " for %s\n",
1216 ndev->name);
1217 }
1218 }
1219
1220 } /* end of ccw_check_unit_check */
1221
1222 /*-------------------------------------------------------------------*
1223 * find_link *
1224 *--------------------------------------------------------------------*/
1225 static int
1226 find_link(struct net_device *dev, char *host_name, char *ws_name )
1227 {
1228 struct claw_privbk *privptr;
1229 struct claw_env *p_env;
1230 int rc=0;
1231
1232 CLAW_DBF_TEXT(2, setup, "findlink");
1233 privptr = dev->ml_priv;
1234 p_env=privptr->p_env;
1235 switch (p_env->packing)
1236 {
1237 case PACKING_ASK:
1238 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1239 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1240 rc = EINVAL;
1241 break;
1242 case DO_PACKED:
1243 case PACK_SEND:
1244 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1245 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1246 rc = EINVAL;
1247 break;
1248 default:
1249 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1250 (memcmp(p_env->api_type , ws_name, 8)!=0))
1251 rc = EINVAL;
1252 break;
1253 }
1254
1255 return 0;
1256 } /* end of find_link */
1257
1258 /*-------------------------------------------------------------------*
1259 * claw_hw_tx *
1260 * *
1261 * *
1262 *-------------------------------------------------------------------*/
1263
1264 static int
1265 claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1266 {
1267 int rc=0;
1268 struct claw_privbk *privptr;
1269 struct ccwbk *p_this_ccw;
1270 struct ccwbk *p_first_ccw;
1271 struct ccwbk *p_last_ccw;
1272 __u32 numBuffers;
1273 signed long len_of_data;
1274 unsigned long bytesInThisBuffer;
1275 unsigned char *pDataAddress;
1276 struct endccw *pEnd;
1277 struct ccw1 tempCCW;
1278 struct chbk *p_ch;
1279 struct claw_env *p_env;
1280 int lock;
1281 struct clawph *pk_head;
1282 struct chbk *ch;
1283
1284 CLAW_DBF_TEXT(4, trace, "hw_tx");
1285 privptr = (struct claw_privbk *)(dev->ml_priv);
1286 p_ch=(struct chbk *)&privptr->channel[WRITE];
1287 p_env =privptr->p_env;
1288 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1289 /* scan the write queue to free any completed write packets */
1290 p_first_ccw=NULL;
1291 p_last_ccw=NULL;
1292 if ((p_env->packing >= PACK_SEND) &&
1293 (skb->cb[1] != 'P')) {
1294 skb_push(skb,sizeof(struct clawph));
1295 pk_head=(struct clawph *)skb->data;
1296 pk_head->len=skb->len-sizeof(struct clawph);
1297 if (pk_head->len%4) {
1298 pk_head->len+= 4-(pk_head->len%4);
1299 skb_pad(skb,4-(pk_head->len%4));
1300 skb_put(skb,4-(pk_head->len%4));
1301 }
1302 if (p_env->packing == DO_PACKED)
1303 pk_head->link_num = linkid;
1304 else
1305 pk_head->link_num = 0;
1306 pk_head->flag = 0x00;
1307 skb_pad(skb,4);
1308 skb->cb[1] = 'P';
1309 }
1310 if (linkid == 0) {
1311 if (claw_check_busy(dev)) {
1312 if (privptr->write_free_count!=0) {
1313 claw_clear_busy(dev);
1314 }
1315 else {
1316 claw_strt_out_IO(dev );
1317 claw_free_wrt_buf( dev );
1318 if (privptr->write_free_count==0) {
1319 ch = &privptr->channel[WRITE];
1320 atomic_inc(&skb->users);
1321 skb_queue_tail(&ch->collect_queue, skb);
1322 goto Done;
1323 }
1324 else {
1325 claw_clear_busy(dev);
1326 }
1327 }
1328 }
1329 /* tx lock */
1330 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1331 ch = &privptr->channel[WRITE];
1332 atomic_inc(&skb->users);
1333 skb_queue_tail(&ch->collect_queue, skb);
1334 claw_strt_out_IO(dev );
1335 rc=-EBUSY;
1336 goto Done2;
1337 }
1338 }
1339 /* See how many write buffers are required to hold this data */
1340 numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1341
1342 /* If that number of buffers isn't available, give up for now */
1343 if (privptr->write_free_count < numBuffers ||
1344 privptr->p_write_free_chain == NULL ) {
1345
1346 claw_setbit_busy(TB_NOBUFFER,dev);
1347 ch = &privptr->channel[WRITE];
1348 atomic_inc(&skb->users);
1349 skb_queue_tail(&ch->collect_queue, skb);
1350 CLAW_DBF_TEXT(2, trace, "clawbusy");
1351 goto Done2;
1352 }
1353 pDataAddress=skb->data;
1354 len_of_data=skb->len;
1355
1356 while (len_of_data > 0) {
1357 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1358 if (p_this_ccw == NULL) { /* lost the race */
1359 ch = &privptr->channel[WRITE];
1360 atomic_inc(&skb->users);
1361 skb_queue_tail(&ch->collect_queue, skb);
1362 goto Done2;
1363 }
1364 privptr->p_write_free_chain=p_this_ccw->next;
1365 p_this_ccw->next=NULL;
1366 --privptr->write_free_count; /* -1 */
1367 bytesInThisBuffer=len_of_data;
1368 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1369 len_of_data-=bytesInThisBuffer;
1370 pDataAddress+=(unsigned long)bytesInThisBuffer;
1371 /* setup write CCW */
1372 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1373 if (len_of_data>0) {
1374 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1375 }
1376 p_this_ccw->write.count=bytesInThisBuffer;
1377 /* now add to end of this chain */
1378 if (p_first_ccw==NULL) {
1379 p_first_ccw=p_this_ccw;
1380 }
1381 if (p_last_ccw!=NULL) {
1382 p_last_ccw->next=p_this_ccw;
1383 /* set up TIC ccws */
1384 p_last_ccw->w_TIC_1.cda=
1385 (__u32)__pa(&p_this_ccw->write);
1386 }
1387 p_last_ccw=p_this_ccw; /* save new last block */
1388 }
1389
1390 /* FirstCCW and LastCCW now contain a new set of write channel
1391 * programs to append to the running channel program
1392 */
1393
1394 if (p_first_ccw!=NULL) {
1395 /* setup ending ccw sequence for this segment */
1396 pEnd=privptr->p_end_ccw;
1397 if (pEnd->write1) {
1398 pEnd->write1=0x00; /* second end ccw is now active */
1399 /* set up Tic CCWs */
1400 p_last_ccw->w_TIC_1.cda=
1401 (__u32)__pa(&pEnd->write2_nop1);
1402 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1403 pEnd->write2_nop2.flags =
1404 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1405 pEnd->write2_nop2.cda=0;
1406 pEnd->write2_nop2.count=1;
1407 }
1408 else { /* end of if (pEnd->write1)*/
1409 pEnd->write1=0x01; /* first end ccw is now active */
1410 /* set up Tic CCWs */
1411 p_last_ccw->w_TIC_1.cda=
1412 (__u32)__pa(&pEnd->write1_nop1);
1413 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1414 pEnd->write1_nop2.flags =
1415 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1416 pEnd->write1_nop2.cda=0;
1417 pEnd->write1_nop2.count=1;
1418 } /* end if if (pEnd->write1) */
1419
1420 if (privptr->p_write_active_first==NULL ) {
1421 privptr->p_write_active_first=p_first_ccw;
1422 privptr->p_write_active_last=p_last_ccw;
1423 }
1424 else {
1425 /* set up Tic CCWs */
1426
1427 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1428 tempCCW.count=0;
1429 tempCCW.flags=0;
1430 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1431
1432 if (pEnd->write1) {
1433
1434 /*
1435 * first set of ending CCW's is chained to the new write
1436 * chain, so the second set is chained to the active chain
1437 * Therefore modify the second set to point the new write chain.
1438 * make sure we update the CCW atomically
1439 * so channel does not fetch it when it's only half done
1440 */
1441 memcpy( &pEnd->write2_nop2, &tempCCW ,
1442 sizeof(struct ccw1));
1443 privptr->p_write_active_last->w_TIC_1.cda=
1444 (__u32)__pa(&p_first_ccw->write);
1445 }
1446 else {
1447
1448 /*make sure we update the CCW atomically
1449 *so channel does not fetch it when it's only half done
1450 */
1451 memcpy(&pEnd->write1_nop2, &tempCCW ,
1452 sizeof(struct ccw1));
1453 privptr->p_write_active_last->w_TIC_1.cda=
1454 (__u32)__pa(&p_first_ccw->write);
1455
1456 } /* end if if (pEnd->write1) */
1457
1458 privptr->p_write_active_last->next=p_first_ccw;
1459 privptr->p_write_active_last=p_last_ccw;
1460 }
1461
1462 } /* endif (p_first_ccw!=NULL) */
1463 dev_kfree_skb_any(skb);
1464 if (linkid==0) {
1465 lock=LOCK_NO;
1466 }
1467 else {
1468 lock=LOCK_YES;
1469 }
1470 claw_strt_out_IO(dev );
1471 /* if write free count is zero , set NOBUFFER */
1472 if (privptr->write_free_count==0) {
1473 claw_setbit_busy(TB_NOBUFFER,dev);
1474 }
1475 Done2:
1476 claw_clearbit_busy(TB_TX,dev);
1477 Done:
1478 return(rc);
1479 } /* end of claw_hw_tx */
1480
1481 /*-------------------------------------------------------------------*
1482 * *
1483 * init_ccw_bk *
1484 * *
1485 *--------------------------------------------------------------------*/
1486
1487 static int
1488 init_ccw_bk(struct net_device *dev)
1489 {
1490
1491 __u32 ccw_blocks_required;
1492 __u32 ccw_blocks_perpage;
1493 __u32 ccw_pages_required;
1494 __u32 claw_reads_perpage=1;
1495 __u32 claw_read_pages;
1496 __u32 claw_writes_perpage=1;
1497 __u32 claw_write_pages;
1498 void *p_buff=NULL;
1499 struct ccwbk*p_free_chain;
1500 struct ccwbk*p_buf;
1501 struct ccwbk*p_last_CCWB;
1502 struct ccwbk*p_first_CCWB;
1503 struct endccw *p_endccw=NULL;
1504 addr_t real_address;
1505 struct claw_privbk *privptr = dev->ml_priv;
1506 struct clawh *pClawH=NULL;
1507 addr_t real_TIC_address;
1508 int i,j;
1509 CLAW_DBF_TEXT(4, trace, "init_ccw");
1510
1511 /* initialize statistics field */
1512 privptr->active_link_ID=0;
1513 /* initialize ccwbk pointers */
1514 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
1515 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1516 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
1517 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
1518 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
1519 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
1520 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
1521 privptr->buffs_alloc = 0;
1522 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1523 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1524 /* initialize free write ccwbk counter */
1525 privptr->write_free_count=0; /* number of free bufs on write chain */
1526 p_last_CCWB = NULL;
1527 p_first_CCWB= NULL;
1528 /*
1529 * We need 1 CCW block for each read buffer, 1 for each
1530 * write buffer, plus 1 for ClawSignalBlock
1531 */
1532 ccw_blocks_required =
1533 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1534 /*
1535 * compute number of CCW blocks that will fit in a page
1536 */
1537 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
1538 ccw_pages_required=
1539 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1540
1541 /*
1542 * read and write sizes are set by 2 constants in claw.h
1543 * 4k and 32k. Unpacked values other than 4k are not going to
1544 * provide good performance. With packing buffers support 32k
1545 * buffers are used.
1546 */
1547 if (privptr->p_env->read_size < PAGE_SIZE) {
1548 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1549 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1550 claw_reads_perpage);
1551 }
1552 else { /* > or equal */
1553 privptr->p_buff_pages_perread =
1554 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1555 claw_read_pages = privptr->p_env->read_buffers *
1556 privptr->p_buff_pages_perread;
1557 }
1558 if (privptr->p_env->write_size < PAGE_SIZE) {
1559 claw_writes_perpage =
1560 PAGE_SIZE / privptr->p_env->write_size;
1561 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1562 claw_writes_perpage);
1563
1564 }
1565 else { /* > or equal */
1566 privptr->p_buff_pages_perwrite =
1567 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1568 claw_write_pages = privptr->p_env->write_buffers *
1569 privptr->p_buff_pages_perwrite;
1570 }
1571 /*
1572 * allocate ccw_pages_required
1573 */
1574 if (privptr->p_buff_ccw==NULL) {
1575 privptr->p_buff_ccw=
1576 (void *)__get_free_pages(__GFP_DMA,
1577 (int)pages_to_order_of_mag(ccw_pages_required ));
1578 if (privptr->p_buff_ccw==NULL) {
1579 return -ENOMEM;
1580 }
1581 privptr->p_buff_ccw_num=ccw_pages_required;
1582 }
1583 memset(privptr->p_buff_ccw, 0x00,
1584 privptr->p_buff_ccw_num * PAGE_SIZE);
1585
1586 /*
1587 * obtain ending ccw block address
1588 *
1589 */
1590 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1591 real_address = (__u32)__pa(privptr->p_end_ccw);
1592 /* Initialize ending CCW block */
1593 p_endccw=privptr->p_end_ccw;
1594 p_endccw->real=real_address;
1595 p_endccw->write1=0x00;
1596 p_endccw->read1=0x00;
1597
1598 /* write1_nop1 */
1599 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1600 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1601 p_endccw->write1_nop1.count = 1;
1602 p_endccw->write1_nop1.cda = 0;
1603
1604 /* write1_nop2 */
1605 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1606 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1607 p_endccw->write1_nop2.count = 1;
1608 p_endccw->write1_nop2.cda = 0;
1609
1610 /* write2_nop1 */
1611 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1612 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1613 p_endccw->write2_nop1.count = 1;
1614 p_endccw->write2_nop1.cda = 0;
1615
1616 /* write2_nop2 */
1617 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1618 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1619 p_endccw->write2_nop2.count = 1;
1620 p_endccw->write2_nop2.cda = 0;
1621
1622 /* read1_nop1 */
1623 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1624 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1625 p_endccw->read1_nop1.count = 1;
1626 p_endccw->read1_nop1.cda = 0;
1627
1628 /* read1_nop2 */
1629 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1630 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1631 p_endccw->read1_nop2.count = 1;
1632 p_endccw->read1_nop2.cda = 0;
1633
1634 /* read2_nop1 */
1635 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1636 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1637 p_endccw->read2_nop1.count = 1;
1638 p_endccw->read2_nop1.cda = 0;
1639
1640 /* read2_nop2 */
1641 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1642 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1643 p_endccw->read2_nop2.count = 1;
1644 p_endccw->read2_nop2.cda = 0;
1645
1646 /*
1647 * Build a chain of CCWs
1648 *
1649 */
1650 p_buff=privptr->p_buff_ccw;
1651
1652 p_free_chain=NULL;
1653 for (i=0 ; i < ccw_pages_required; i++ ) {
1654 real_address = (__u32)__pa(p_buff);
1655 p_buf=p_buff;
1656 for (j=0 ; j < ccw_blocks_perpage ; j++) {
1657 p_buf->next = p_free_chain;
1658 p_free_chain = p_buf;
1659 p_buf->real=(__u32)__pa(p_buf);
1660 ++p_buf;
1661 }
1662 p_buff+=PAGE_SIZE;
1663 }
1664 /*
1665 * Initialize ClawSignalBlock
1666 *
1667 */
1668 if (privptr->p_claw_signal_blk==NULL) {
1669 privptr->p_claw_signal_blk=p_free_chain;
1670 p_free_chain=p_free_chain->next;
1671 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1672 pClawH->length=0xffff;
1673 pClawH->opcode=0xff;
1674 pClawH->flag=CLAW_BUSY;
1675 }
1676
1677 /*
1678 * allocate write_pages_required and add to free chain
1679 */
1680 if (privptr->p_buff_write==NULL) {
1681 if (privptr->p_env->write_size < PAGE_SIZE) {
1682 privptr->p_buff_write=
1683 (void *)__get_free_pages(__GFP_DMA,
1684 (int)pages_to_order_of_mag(claw_write_pages ));
1685 if (privptr->p_buff_write==NULL) {
1686 privptr->p_buff_ccw=NULL;
1687 return -ENOMEM;
1688 }
1689 /*
1690 * Build CLAW write free chain
1691 *
1692 */
1693
1694 memset(privptr->p_buff_write, 0x00,
1695 ccw_pages_required * PAGE_SIZE);
1696 privptr->p_write_free_chain=NULL;
1697
1698 p_buff=privptr->p_buff_write;
1699
1700 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1701 p_buf = p_free_chain; /* get a CCW */
1702 p_free_chain = p_buf->next;
1703 p_buf->next =privptr->p_write_free_chain;
1704 privptr->p_write_free_chain = p_buf;
1705 p_buf-> p_buffer = (struct clawbuf *)p_buff;
1706 p_buf-> write.cda = (__u32)__pa(p_buff);
1707 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1708 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1709 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1710 p_buf-> w_read_FF.count = 1;
1711 p_buf-> w_read_FF.cda =
1712 (__u32)__pa(&p_buf-> header.flag);
1713 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1714 p_buf-> w_TIC_1.flags = 0;
1715 p_buf-> w_TIC_1.count = 0;
1716
1717 if (((unsigned long)p_buff +
1718 privptr->p_env->write_size) >=
1719 ((unsigned long)(p_buff+2*
1720 (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1721 p_buff = p_buff+privptr->p_env->write_size;
1722 }
1723 }
1724 }
1725 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1726 {
1727 privptr->p_write_free_chain=NULL;
1728 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1729 p_buff=(void *)__get_free_pages(__GFP_DMA,
1730 (int)pages_to_order_of_mag(
1731 privptr->p_buff_pages_perwrite) );
1732 if (p_buff==NULL) {
1733 free_pages((unsigned long)privptr->p_buff_ccw,
1734 (int)pages_to_order_of_mag(
1735 privptr->p_buff_ccw_num));
1736 privptr->p_buff_ccw=NULL;
1737 p_buf=privptr->p_buff_write;
1738 while (p_buf!=NULL) {
1739 free_pages((unsigned long)
1740 p_buf->p_buffer,
1741 (int)pages_to_order_of_mag(
1742 privptr->p_buff_pages_perwrite));
1743 p_buf=p_buf->next;
1744 }
1745 return -ENOMEM;
1746 } /* Error on get_pages */
1747 memset(p_buff, 0x00, privptr->p_env->write_size );
1748 p_buf = p_free_chain;
1749 p_free_chain = p_buf->next;
1750 p_buf->next = privptr->p_write_free_chain;
1751 privptr->p_write_free_chain = p_buf;
1752 privptr->p_buff_write = p_buf;
1753 p_buf->p_buffer=(struct clawbuf *)p_buff;
1754 p_buf-> write.cda = (__u32)__pa(p_buff);
1755 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1756 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1757 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1758 p_buf-> w_read_FF.count = 1;
1759 p_buf-> w_read_FF.cda =
1760 (__u32)__pa(&p_buf-> header.flag);
1761 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1762 p_buf-> w_TIC_1.flags = 0;
1763 p_buf-> w_TIC_1.count = 0;
1764 } /* for all write_buffers */
1765
1766 } /* else buffers are PAGE_SIZE or bigger */
1767
1768 }
1769 privptr->p_buff_write_num=claw_write_pages;
1770 privptr->write_free_count=privptr->p_env->write_buffers;
1771
1772
1773 /*
1774 * allocate read_pages_required and chain to free chain
1775 */
1776 if (privptr->p_buff_read==NULL) {
1777 if (privptr->p_env->read_size < PAGE_SIZE) {
1778 privptr->p_buff_read=
1779 (void *)__get_free_pages(__GFP_DMA,
1780 (int)pages_to_order_of_mag(claw_read_pages) );
1781 if (privptr->p_buff_read==NULL) {
1782 free_pages((unsigned long)privptr->p_buff_ccw,
1783 (int)pages_to_order_of_mag(
1784 privptr->p_buff_ccw_num));
1785 /* free the write pages size is < page size */
1786 free_pages((unsigned long)privptr->p_buff_write,
1787 (int)pages_to_order_of_mag(
1788 privptr->p_buff_write_num));
1789 privptr->p_buff_ccw=NULL;
1790 privptr->p_buff_write=NULL;
1791 return -ENOMEM;
1792 }
1793 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1794 privptr->p_buff_read_num=claw_read_pages;
1795 /*
1796 * Build CLAW read free chain
1797 *
1798 */
1799 p_buff=privptr->p_buff_read;
1800 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1801 p_buf = p_free_chain;
1802 p_free_chain = p_buf->next;
1803
1804 if (p_last_CCWB==NULL) {
1805 p_buf->next=NULL;
1806 real_TIC_address=0;
1807 p_last_CCWB=p_buf;
1808 }
1809 else {
1810 p_buf->next=p_first_CCWB;
1811 real_TIC_address=
1812 (__u32)__pa(&p_first_CCWB -> read );
1813 }
1814
1815 p_first_CCWB=p_buf;
1816
1817 p_buf->p_buffer=(struct clawbuf *)p_buff;
1818 /* initialize read command */
1819 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1820 p_buf-> read.cda = (__u32)__pa(p_buff);
1821 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1822 p_buf-> read.count = privptr->p_env->read_size;
1823
1824 /* initialize read_h command */
1825 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1826 p_buf-> read_h.cda =
1827 (__u32)__pa(&(p_buf->header));
1828 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1829 p_buf-> read_h.count = sizeof(struct clawh);
1830
1831 /* initialize Signal command */
1832 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1833 p_buf-> signal.cda =
1834 (__u32)__pa(&(pClawH->flag));
1835 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1836 p_buf-> signal.count = 1;
1837
1838 /* initialize r_TIC_1 command */
1839 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1840 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1841 p_buf-> r_TIC_1.flags = 0;
1842 p_buf-> r_TIC_1.count = 0;
1843
1844 /* initialize r_read_FF command */
1845 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1846 p_buf-> r_read_FF.cda =
1847 (__u32)__pa(&(pClawH->flag));
1848 p_buf-> r_read_FF.flags =
1849 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1850 p_buf-> r_read_FF.count = 1;
1851
1852 /* initialize r_TIC_2 */
1853 memcpy(&p_buf->r_TIC_2,
1854 &p_buf->r_TIC_1, sizeof(struct ccw1));
1855
1856 /* initialize Header */
1857 p_buf->header.length=0xffff;
1858 p_buf->header.opcode=0xff;
1859 p_buf->header.flag=CLAW_PENDING;
1860
1861 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1862 ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1863 -1)
1864 & PAGE_MASK)) {
1865 p_buff= p_buff+privptr->p_env->read_size;
1866 }
1867 else {
1868 p_buff=
1869 (void *)((unsigned long)
1870 (p_buff+2*(privptr->p_env->read_size)-1)
1871 & PAGE_MASK) ;
1872 }
1873 } /* for read_buffers */
1874 } /* read_size < PAGE_SIZE */
1875 else { /* read Size >= PAGE_SIZE */
1876 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1877 p_buff = (void *)__get_free_pages(__GFP_DMA,
1878 (int)pages_to_order_of_mag(
1879 privptr->p_buff_pages_perread));
1880 if (p_buff==NULL) {
1881 free_pages((unsigned long)privptr->p_buff_ccw,
1882 (int)pages_to_order_of_mag(privptr->
1883 p_buff_ccw_num));
1884 /* free the write pages */
1885 p_buf=privptr->p_buff_write;
1886 while (p_buf!=NULL) {
1887 free_pages(
1888 (unsigned long)p_buf->p_buffer,
1889 (int)pages_to_order_of_mag(
1890 privptr->p_buff_pages_perwrite));
1891 p_buf=p_buf->next;
1892 }
1893 /* free any read pages already alloc */
1894 p_buf=privptr->p_buff_read;
1895 while (p_buf!=NULL) {
1896 free_pages(
1897 (unsigned long)p_buf->p_buffer,
1898 (int)pages_to_order_of_mag(
1899 privptr->p_buff_pages_perread));
1900 p_buf=p_buf->next;
1901 }
1902 privptr->p_buff_ccw=NULL;
1903 privptr->p_buff_write=NULL;
1904 return -ENOMEM;
1905 }
1906 memset(p_buff, 0x00, privptr->p_env->read_size);
1907 p_buf = p_free_chain;
1908 privptr->p_buff_read = p_buf;
1909 p_free_chain = p_buf->next;
1910
1911 if (p_last_CCWB==NULL) {
1912 p_buf->next=NULL;
1913 real_TIC_address=0;
1914 p_last_CCWB=p_buf;
1915 }
1916 else {
1917 p_buf->next=p_first_CCWB;
1918 real_TIC_address=
1919 (addr_t)__pa(
1920 &p_first_CCWB -> read );
1921 }
1922
1923 p_first_CCWB=p_buf;
1924 /* save buff address */
1925 p_buf->p_buffer=(struct clawbuf *)p_buff;
1926 /* initialize read command */
1927 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1928 p_buf-> read.cda = (__u32)__pa(p_buff);
1929 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1930 p_buf-> read.count = privptr->p_env->read_size;
1931
1932 /* initialize read_h command */
1933 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1934 p_buf-> read_h.cda =
1935 (__u32)__pa(&(p_buf->header));
1936 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1937 p_buf-> read_h.count = sizeof(struct clawh);
1938
1939 /* initialize Signal command */
1940 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1941 p_buf-> signal.cda =
1942 (__u32)__pa(&(pClawH->flag));
1943 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1944 p_buf-> signal.count = 1;
1945
1946 /* initialize r_TIC_1 command */
1947 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1948 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1949 p_buf-> r_TIC_1.flags = 0;
1950 p_buf-> r_TIC_1.count = 0;
1951
1952 /* initialize r_read_FF command */
1953 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1954 p_buf-> r_read_FF.cda =
1955 (__u32)__pa(&(pClawH->flag));
1956 p_buf-> r_read_FF.flags =
1957 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1958 p_buf-> r_read_FF.count = 1;
1959
1960 /* initialize r_TIC_2 */
1961 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
1962 sizeof(struct ccw1));
1963
1964 /* initialize Header */
1965 p_buf->header.length=0xffff;
1966 p_buf->header.opcode=0xff;
1967 p_buf->header.flag=CLAW_PENDING;
1968
1969 } /* For read_buffers */
1970 } /* read_size >= PAGE_SIZE */
1971 } /* pBuffread = NULL */
1972 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
1973 privptr->buffs_alloc = 1;
1974
1975 return 0;
1976 } /* end of init_ccw_bk */
1977
1978 /*-------------------------------------------------------------------*
1979 * *
1980 * probe_error *
1981 * *
1982 *--------------------------------------------------------------------*/
1983
1984 static void
1985 probe_error( struct ccwgroup_device *cgdev)
1986 {
1987 struct claw_privbk *privptr;
1988
1989 CLAW_DBF_TEXT(4, trace, "proberr");
1990 privptr = (struct claw_privbk *) cgdev->dev.driver_data;
1991 if (privptr != NULL) {
1992 cgdev->dev.driver_data = NULL;
1993 kfree(privptr->p_env);
1994 kfree(privptr->p_mtc_envelope);
1995 kfree(privptr);
1996 }
1997 } /* probe_error */
1998
1999 /*-------------------------------------------------------------------*
2000 * claw_process_control *
2001 * *
2002 * *
2003 *--------------------------------------------------------------------*/
2004
2005 static int
2006 claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2007 {
2008
2009 struct clawbuf *p_buf;
2010 struct clawctl ctlbk;
2011 struct clawctl *p_ctlbk;
2012 char temp_host_name[8];
2013 char temp_ws_name[8];
2014 struct claw_privbk *privptr;
2015 struct claw_env *p_env;
2016 struct sysval *p_sysval;
2017 struct conncmd *p_connect=NULL;
2018 int rc;
2019 struct chbk *p_ch = NULL;
2020 struct device *tdev;
2021 CLAW_DBF_TEXT(2, setup, "clw_cntl");
2022 udelay(1000); /* Wait a ms for the control packets to
2023 *catch up to each other */
2024 privptr = dev->ml_priv;
2025 p_env=privptr->p_env;
2026 tdev = &privptr->channel[READ].cdev->dev;
2027 memcpy( &temp_host_name, p_env->host_name, 8);
2028 memcpy( &temp_ws_name, p_env->adapter_name , 8);
2029 dev_info(tdev, "%s: CLAW device %.8s: "
2030 "Received Control Packet\n",
2031 dev->name, temp_ws_name);
2032 if (privptr->release_pend==1) {
2033 return 0;
2034 }
2035 p_buf=p_ccw->p_buffer;
2036 p_ctlbk=&ctlbk;
2037 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2038 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2039 } else {
2040 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2041 }
2042 switch (p_ctlbk->command)
2043 {
2044 case SYSTEM_VALIDATE_REQUEST:
2045 if (p_ctlbk->version != CLAW_VERSION_ID) {
2046 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2047 CLAW_RC_WRONG_VERSION);
2048 dev_warn(tdev, "The communication peer of %s"
2049 " uses an incorrect API version %d\n",
2050 dev->name, p_ctlbk->version);
2051 }
2052 p_sysval = (struct sysval *)&(p_ctlbk->data);
2053 dev_info(tdev, "%s: Recv Sys Validate Request: "
2054 "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2055 "Host name=%.8s\n",
2056 dev->name, p_ctlbk->version,
2057 p_ctlbk->linkid,
2058 p_ctlbk->correlator,
2059 p_sysval->WS_name,
2060 p_sysval->host_name);
2061 if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2062 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2063 CLAW_RC_NAME_MISMATCH);
2064 CLAW_DBF_TEXT(2, setup, "HSTBAD");
2065 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2066 CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
2067 dev_warn(tdev,
2068 "Host name %s for %s does not match the"
2069 " remote adapter name %s\n",
2070 p_sysval->host_name,
2071 dev->name,
2072 temp_host_name);
2073 }
2074 if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2075 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2076 CLAW_RC_NAME_MISMATCH);
2077 CLAW_DBF_TEXT(2, setup, "WSNBAD");
2078 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2079 CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
2080 dev_warn(tdev, "Adapter name %s for %s does not match"
2081 " the remote host name %s\n",
2082 p_sysval->WS_name,
2083 dev->name,
2084 temp_ws_name);
2085 }
2086 if ((p_sysval->write_frame_size < p_env->write_size) &&
2087 (p_env->packing == 0)) {
2088 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2089 CLAW_RC_HOST_RCV_TOO_SMALL);
2090 dev_warn(tdev,
2091 "The local write buffer is smaller than the"
2092 " remote read buffer\n");
2093 CLAW_DBF_TEXT(2, setup, "wrtszbad");
2094 }
2095 if ((p_sysval->read_frame_size < p_env->read_size) &&
2096 (p_env->packing == 0)) {
2097 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2098 CLAW_RC_HOST_RCV_TOO_SMALL);
2099 dev_warn(tdev,
2100 "The local read buffer is smaller than the"
2101 " remote write buffer\n");
2102 CLAW_DBF_TEXT(2, setup, "rdsizbad");
2103 }
2104 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
2105 dev_info(tdev,
2106 "CLAW device %.8s: System validate"
2107 " completed.\n", temp_ws_name);
2108 dev_info(tdev,
2109 "%s: sys Validate Rsize:%d Wsize:%d\n",
2110 dev->name, p_sysval->read_frame_size,
2111 p_sysval->write_frame_size);
2112 privptr->system_validate_comp = 1;
2113 if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2114 p_env->packing = PACKING_ASK;
2115 claw_strt_conn_req(dev);
2116 break;
2117 case SYSTEM_VALIDATE_RESPONSE:
2118 p_sysval = (struct sysval *)&(p_ctlbk->data);
2119 dev_info(tdev,
2120 "Settings for %s validated (version=%d, "
2121 "remote device=%d, rc=%d, adapter name=%.8s, "
2122 "host name=%.8s)\n",
2123 dev->name,
2124 p_ctlbk->version,
2125 p_ctlbk->correlator,
2126 p_ctlbk->rc,
2127 p_sysval->WS_name,
2128 p_sysval->host_name);
2129 switch (p_ctlbk->rc) {
2130 case 0:
2131 dev_info(tdev, "%s: CLAW device "
2132 "%.8s: System validate completed.\n",
2133 dev->name, temp_ws_name);
2134 if (privptr->system_validate_comp == 0)
2135 claw_strt_conn_req(dev);
2136 privptr->system_validate_comp = 1;
2137 break;
2138 case CLAW_RC_NAME_MISMATCH:
2139 dev_warn(tdev, "Validating %s failed because of"
2140 " a host or adapter name mismatch\n",
2141 dev->name);
2142 break;
2143 case CLAW_RC_WRONG_VERSION:
2144 dev_warn(tdev, "Validating %s failed because of a"
2145 " version conflict\n",
2146 dev->name);
2147 break;
2148 case CLAW_RC_HOST_RCV_TOO_SMALL:
2149 dev_warn(tdev, "Validating %s failed because of a"
2150 " frame size conflict\n",
2151 dev->name);
2152 break;
2153 default:
2154 dev_warn(tdev, "The communication peer of %s rejected"
2155 " the connection\n",
2156 dev->name);
2157 break;
2158 }
2159 break;
2160
2161 case CONNECTION_REQUEST:
2162 p_connect = (struct conncmd *)&(p_ctlbk->data);
2163 dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2164 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2165 dev->name,
2166 p_ctlbk->version,
2167 p_ctlbk->linkid,
2168 p_ctlbk->correlator,
2169 p_connect->host_name,
2170 p_connect->WS_name);
2171 if (privptr->active_link_ID != 0) {
2172 claw_snd_disc(dev, p_ctlbk);
2173 dev_info(tdev, "%s rejected a connection request"
2174 " because it is already active\n",
2175 dev->name);
2176 }
2177 if (p_ctlbk->linkid != 1) {
2178 claw_snd_disc(dev, p_ctlbk);
2179 dev_info(tdev, "%s rejected a request to open multiple"
2180 " connections\n",
2181 dev->name);
2182 }
2183 rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2184 if (rc != 0) {
2185 claw_snd_disc(dev, p_ctlbk);
2186 dev_info(tdev, "%s rejected a connection request"
2187 " because of a type mismatch\n",
2188 dev->name);
2189 }
2190 claw_send_control(dev,
2191 CONNECTION_CONFIRM, p_ctlbk->linkid,
2192 p_ctlbk->correlator,
2193 0, p_connect->host_name,
2194 p_connect->WS_name);
2195 if (p_env->packing == PACKING_ASK) {
2196 p_env->packing = PACK_SEND;
2197 claw_snd_conn_req(dev, 0);
2198 }
2199 dev_info(tdev, "%s: CLAW device %.8s: Connection "
2200 "completed link_id=%d.\n",
2201 dev->name, temp_ws_name,
2202 p_ctlbk->linkid);
2203 privptr->active_link_ID = p_ctlbk->linkid;
2204 p_ch = &privptr->channel[WRITE];
2205 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2206 break;
2207 case CONNECTION_RESPONSE:
2208 p_connect = (struct conncmd *)&(p_ctlbk->data);
2209 dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
2210 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2211 dev->name,
2212 p_ctlbk->version,
2213 p_ctlbk->linkid,
2214 p_ctlbk->correlator,
2215 p_ctlbk->rc,
2216 p_connect->host_name,
2217 p_connect->WS_name);
2218
2219 if (p_ctlbk->rc != 0) {
2220 dev_warn(tdev, "The communication peer of %s rejected"
2221 " a connection request\n",
2222 dev->name);
2223 return 1;
2224 }
2225 rc = find_link(dev,
2226 p_connect->host_name, p_connect->WS_name);
2227 if (rc != 0) {
2228 claw_snd_disc(dev, p_ctlbk);
2229 dev_warn(tdev, "The communication peer of %s"
2230 " rejected a connection "
2231 "request because of a type mismatch\n",
2232 dev->name);
2233 }
2234 /* should be until CONNECTION_CONFIRM */
2235 privptr->active_link_ID = -(p_ctlbk->linkid);
2236 break;
2237 case CONNECTION_CONFIRM:
2238 p_connect = (struct conncmd *)&(p_ctlbk->data);
2239 dev_info(tdev,
2240 "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
2241 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
2242 dev->name,
2243 p_ctlbk->version,
2244 p_ctlbk->linkid,
2245 p_ctlbk->correlator,
2246 p_connect->host_name,
2247 p_connect->WS_name);
2248 if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2249 privptr->active_link_ID = p_ctlbk->linkid;
2250 if (p_env->packing > PACKING_ASK) {
2251 dev_info(tdev,
2252 "%s: Confirmed Now packing\n", dev->name);
2253 p_env->packing = DO_PACKED;
2254 }
2255 p_ch = &privptr->channel[WRITE];
2256 wake_up(&p_ch->wait);
2257 } else {
2258 dev_warn(tdev, "Activating %s failed because of"
2259 " an incorrect link ID=%d\n",
2260 dev->name, p_ctlbk->linkid);
2261 claw_snd_disc(dev, p_ctlbk);
2262 }
2263 break;
2264 case DISCONNECT:
2265 dev_info(tdev, "%s: Disconnect: "
2266 "Vers=%d,link_id=%d,Corr=%d\n",
2267 dev->name, p_ctlbk->version,
2268 p_ctlbk->linkid, p_ctlbk->correlator);
2269 if ((p_ctlbk->linkid == 2) &&
2270 (p_env->packing == PACK_SEND)) {
2271 privptr->active_link_ID = 1;
2272 p_env->packing = DO_PACKED;
2273 } else
2274 privptr->active_link_ID = 0;
2275 break;
2276 case CLAW_ERROR:
2277 dev_warn(tdev, "The communication peer of %s failed\n",
2278 dev->name);
2279 break;
2280 default:
2281 dev_warn(tdev, "The communication peer of %s sent"
2282 " an unknown command code\n",
2283 dev->name);
2284 break;
2285 }
2286
2287 return 0;
2288 } /* end of claw_process_control */
2289
2290
2291 /*-------------------------------------------------------------------*
2292 * claw_send_control *
2293 * *
2294 *--------------------------------------------------------------------*/
2295
2296 static int
2297 claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2298 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2299 {
2300 struct claw_privbk *privptr;
2301 struct clawctl *p_ctl;
2302 struct sysval *p_sysval;
2303 struct conncmd *p_connect;
2304 struct sk_buff *skb;
2305
2306 CLAW_DBF_TEXT(2, setup, "sndcntl");
2307 privptr = dev->ml_priv;
2308 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2309
2310 p_ctl->command=type;
2311 p_ctl->version=CLAW_VERSION_ID;
2312 p_ctl->linkid=link;
2313 p_ctl->correlator=correlator;
2314 p_ctl->rc=rc;
2315
2316 p_sysval=(struct sysval *)&p_ctl->data;
2317 p_connect=(struct conncmd *)&p_ctl->data;
2318
2319 switch (p_ctl->command) {
2320 case SYSTEM_VALIDATE_REQUEST:
2321 case SYSTEM_VALIDATE_RESPONSE:
2322 memcpy(&p_sysval->host_name, local_name, 8);
2323 memcpy(&p_sysval->WS_name, remote_name, 8);
2324 if (privptr->p_env->packing > 0) {
2325 p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2326 p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
2327 } else {
2328 /* how big is the biggest group of packets */
2329 p_sysval->read_frame_size =
2330 privptr->p_env->read_size;
2331 p_sysval->write_frame_size =
2332 privptr->p_env->write_size;
2333 }
2334 memset(&p_sysval->reserved, 0x00, 4);
2335 break;
2336 case CONNECTION_REQUEST:
2337 case CONNECTION_RESPONSE:
2338 case CONNECTION_CONFIRM:
2339 case DISCONNECT:
2340 memcpy(&p_sysval->host_name, local_name, 8);
2341 memcpy(&p_sysval->WS_name, remote_name, 8);
2342 if (privptr->p_env->packing > 0) {
2343 /* How big is the biggest packet */
2344 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2345 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2346 } else {
2347 memset(&p_connect->reserved1, 0x00, 4);
2348 memset(&p_connect->reserved2, 0x00, 4);
2349 }
2350 break;
2351 default:
2352 break;
2353 }
2354
2355 /* write Control Record to the device */
2356
2357
2358 skb = dev_alloc_skb(sizeof(struct clawctl));
2359 if (!skb) {
2360 return -ENOMEM;
2361 }
2362 memcpy(skb_put(skb, sizeof(struct clawctl)),
2363 p_ctl, sizeof(struct clawctl));
2364 if (privptr->p_env->packing >= PACK_SEND)
2365 claw_hw_tx(skb, dev, 1);
2366 else
2367 claw_hw_tx(skb, dev, 0);
2368 return 0;
2369 } /* end of claw_send_control */
2370
2371 /*-------------------------------------------------------------------*
2372 * claw_snd_conn_req *
2373 * *
2374 *--------------------------------------------------------------------*/
2375 static int
2376 claw_snd_conn_req(struct net_device *dev, __u8 link)
2377 {
2378 int rc;
2379 struct claw_privbk *privptr = dev->ml_priv;
2380 struct clawctl *p_ctl;
2381
2382 CLAW_DBF_TEXT(2, setup, "snd_conn");
2383 rc = 1;
2384 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2385 p_ctl->linkid = link;
2386 if ( privptr->system_validate_comp==0x00 ) {
2387 return rc;
2388 }
2389 if (privptr->p_env->packing == PACKING_ASK )
2390 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2391 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2392 if (privptr->p_env->packing == PACK_SEND) {
2393 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2394 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2395 }
2396 if (privptr->p_env->packing == 0)
2397 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2398 HOST_APPL_NAME, privptr->p_env->api_type);
2399 return rc;
2400
2401 } /* end of claw_snd_conn_req */
2402
2403
2404 /*-------------------------------------------------------------------*
2405 * claw_snd_disc *
2406 * *
2407 *--------------------------------------------------------------------*/
2408
2409 static int
2410 claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2411 {
2412 int rc;
2413 struct conncmd * p_connect;
2414
2415 CLAW_DBF_TEXT(2, setup, "snd_dsc");
2416 p_connect=(struct conncmd *)&p_ctl->data;
2417
2418 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2419 p_ctl->correlator, 0,
2420 p_connect->host_name, p_connect->WS_name);
2421 return rc;
2422 } /* end of claw_snd_disc */
2423
2424
2425 /*-------------------------------------------------------------------*
2426 * claw_snd_sys_validate_rsp *
2427 * *
2428 *--------------------------------------------------------------------*/
2429
2430 static int
2431 claw_snd_sys_validate_rsp(struct net_device *dev,
2432 struct clawctl *p_ctl, __u32 return_code)
2433 {
2434 struct claw_env * p_env;
2435 struct claw_privbk *privptr;
2436 int rc;
2437
2438 CLAW_DBF_TEXT(2, setup, "chkresp");
2439 privptr = dev->ml_priv;
2440 p_env=privptr->p_env;
2441 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2442 p_ctl->linkid,
2443 p_ctl->correlator,
2444 return_code,
2445 p_env->host_name,
2446 p_env->adapter_name );
2447 return rc;
2448 } /* end of claw_snd_sys_validate_rsp */
2449
2450 /*-------------------------------------------------------------------*
2451 * claw_strt_conn_req *
2452 * *
2453 *--------------------------------------------------------------------*/
2454
2455 static int
2456 claw_strt_conn_req(struct net_device *dev )
2457 {
2458 int rc;
2459
2460 CLAW_DBF_TEXT(2, setup, "conn_req");
2461 rc=claw_snd_conn_req(dev, 1);
2462 return rc;
2463 } /* end of claw_strt_conn_req */
2464
2465
2466
2467 /*-------------------------------------------------------------------*
2468 * claw_stats *
2469 *-------------------------------------------------------------------*/
2470
2471 static struct
2472 net_device_stats *claw_stats(struct net_device *dev)
2473 {
2474 struct claw_privbk *privptr;
2475
2476 CLAW_DBF_TEXT(4, trace, "stats");
2477 privptr = dev->ml_priv;
2478 return &privptr->stats;
2479 } /* end of claw_stats */
2480
2481
2482 /*-------------------------------------------------------------------*
2483 * unpack_read *
2484 * *
2485 *--------------------------------------------------------------------*/
2486 static void
2487 unpack_read(struct net_device *dev )
2488 {
2489 struct sk_buff *skb;
2490 struct claw_privbk *privptr;
2491 struct claw_env *p_env;
2492 struct ccwbk *p_this_ccw;
2493 struct ccwbk *p_first_ccw;
2494 struct ccwbk *p_last_ccw;
2495 struct clawph *p_packh;
2496 void *p_packd;
2497 struct clawctl *p_ctlrec=NULL;
2498 struct device *p_dev;
2499
2500 __u32 len_of_data;
2501 __u32 pack_off;
2502 __u8 link_num;
2503 __u8 mtc_this_frm=0;
2504 __u32 bytes_to_mov;
2505 int i=0;
2506 int p=0;
2507
2508 CLAW_DBF_TEXT(4, trace, "unpkread");
2509 p_first_ccw=NULL;
2510 p_last_ccw=NULL;
2511 p_packh=NULL;
2512 p_packd=NULL;
2513 privptr = dev->ml_priv;
2514
2515 p_dev = &privptr->channel[READ].cdev->dev;
2516 p_env = privptr->p_env;
2517 p_this_ccw=privptr->p_read_active_first;
2518 i=0;
2519 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
2520 pack_off = 0;
2521 p = 0;
2522 p_this_ccw->header.flag=CLAW_PENDING;
2523 privptr->p_read_active_first=p_this_ccw->next;
2524 p_this_ccw->next=NULL;
2525 p_packh = (struct clawph *)p_this_ccw->p_buffer;
2526 if ((p_env->packing == PACK_SEND) &&
2527 (p_packh->len == 32) &&
2528 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
2529 p_packh++; /* peek past pack header */
2530 p_ctlrec = (struct clawctl *)p_packh;
2531 p_packh--; /* un peek */
2532 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2533 (p_ctlrec->command == CONNECTION_CONFIRM))
2534 p_env->packing = DO_PACKED;
2535 }
2536 if (p_env->packing == DO_PACKED)
2537 link_num=p_packh->link_num;
2538 else
2539 link_num=p_this_ccw->header.opcode / 8;
2540 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
2541 mtc_this_frm=1;
2542 if (p_this_ccw->header.length!=
2543 privptr->p_env->read_size ) {
2544 dev_warn(p_dev,
2545 "The communication peer of %s"
2546 " sent a faulty"
2547 " frame of length %02x\n",
2548 dev->name, p_this_ccw->header.length);
2549 }
2550 }
2551
2552 if (privptr->mtc_skipping) {
2553 /*
2554 * We're in the mode of skipping past a
2555 * multi-frame message
2556 * that we can't process for some reason or other.
2557 * The first frame without the More-To-Come flag is
2558 * the last frame of the skipped message.
2559 */
2560 /* in case of More-To-Come not set in this frame */
2561 if (mtc_this_frm==0) {
2562 privptr->mtc_skipping=0; /* Ok, the end */
2563 privptr->mtc_logical_link=-1;
2564 }
2565 goto NextFrame;
2566 }
2567
2568 if (link_num==0) {
2569 claw_process_control(dev, p_this_ccw);
2570 CLAW_DBF_TEXT(4, trace, "UnpkCntl");
2571 goto NextFrame;
2572 }
2573 unpack_next:
2574 if (p_env->packing == DO_PACKED) {
2575 if (pack_off > p_env->read_size)
2576 goto NextFrame;
2577 p_packd = p_this_ccw->p_buffer+pack_off;
2578 p_packh = (struct clawph *) p_packd;
2579 if ((p_packh->len == 0) || /* done with this frame? */
2580 (p_packh->flag != 0))
2581 goto NextFrame;
2582 bytes_to_mov = p_packh->len;
2583 pack_off += bytes_to_mov+sizeof(struct clawph);
2584 p++;
2585 } else {
2586 bytes_to_mov=p_this_ccw->header.length;
2587 }
2588 if (privptr->mtc_logical_link<0) {
2589
2590 /*
2591 * if More-To-Come is set in this frame then we don't know
2592 * length of entire message, and hence have to allocate
2593 * large buffer */
2594
2595 /* We are starting a new envelope */
2596 privptr->mtc_offset=0;
2597 privptr->mtc_logical_link=link_num;
2598 }
2599
2600 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2601 /* error */
2602 privptr->stats.rx_frame_errors++;
2603 goto NextFrame;
2604 }
2605 if (p_env->packing == DO_PACKED) {
2606 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2607 p_packd+sizeof(struct clawph), bytes_to_mov);
2608
2609 } else {
2610 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2611 p_this_ccw->p_buffer, bytes_to_mov);
2612 }
2613 if (mtc_this_frm==0) {
2614 len_of_data=privptr->mtc_offset+bytes_to_mov;
2615 skb=dev_alloc_skb(len_of_data);
2616 if (skb) {
2617 memcpy(skb_put(skb,len_of_data),
2618 privptr->p_mtc_envelope,
2619 len_of_data);
2620 skb->dev=dev;
2621 skb_reset_mac_header(skb);
2622 skb->protocol=htons(ETH_P_IP);
2623 skb->ip_summed=CHECKSUM_UNNECESSARY;
2624 privptr->stats.rx_packets++;
2625 privptr->stats.rx_bytes+=len_of_data;
2626 netif_rx(skb);
2627 }
2628 else {
2629 dev_info(p_dev, "Allocating a buffer for"
2630 " incoming data failed\n");
2631 privptr->stats.rx_dropped++;
2632 }
2633 privptr->mtc_offset=0;
2634 privptr->mtc_logical_link=-1;
2635 }
2636 else {
2637 privptr->mtc_offset+=bytes_to_mov;
2638 }
2639 if (p_env->packing == DO_PACKED)
2640 goto unpack_next;
2641 NextFrame:
2642 /*
2643 * Remove ThisCCWblock from active read queue, and add it
2644 * to queue of free blocks to be reused.
2645 */
2646 i++;
2647 p_this_ccw->header.length=0xffff;
2648 p_this_ccw->header.opcode=0xff;
2649 /*
2650 * add this one to the free queue for later reuse
2651 */
2652 if (p_first_ccw==NULL) {
2653 p_first_ccw = p_this_ccw;
2654 }
2655 else {
2656 p_last_ccw->next = p_this_ccw;
2657 }
2658 p_last_ccw = p_this_ccw;
2659 /*
2660 * chain to next block on active read queue
2661 */
2662 p_this_ccw = privptr->p_read_active_first;
2663 CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
2664 } /* end of while */
2665
2666 /* check validity */
2667
2668 CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
2669 add_claw_reads(dev, p_first_ccw, p_last_ccw);
2670 claw_strt_read(dev, LOCK_YES);
2671 return;
2672 } /* end of unpack_read */
2673
2674 /*-------------------------------------------------------------------*
2675 * claw_strt_read *
2676 * *
2677 *--------------------------------------------------------------------*/
2678 static void
2679 claw_strt_read (struct net_device *dev, int lock )
2680 {
2681 int rc = 0;
2682 __u32 parm;
2683 unsigned long saveflags = 0;
2684 struct claw_privbk *privptr = dev->ml_priv;
2685 struct ccwbk*p_ccwbk;
2686 struct chbk *p_ch;
2687 struct clawh *p_clawh;
2688 p_ch=&privptr->channel[READ];
2689
2690 CLAW_DBF_TEXT(4, trace, "StRdNter");
2691 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2692 p_clawh->flag=CLAW_IDLE; /* 0x00 */
2693
2694 if ((privptr->p_write_active_first!=NULL &&
2695 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2696 (privptr->p_read_active_first!=NULL &&
2697 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2698 p_clawh->flag=CLAW_BUSY; /* 0xff */
2699 }
2700 if (lock==LOCK_YES) {
2701 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2702 }
2703 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2704 CLAW_DBF_TEXT(4, trace, "HotRead");
2705 p_ccwbk=privptr->p_read_active_first;
2706 parm = (unsigned long) p_ch;
2707 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2708 0xff, 0);
2709 if (rc != 0) {
2710 ccw_check_return_code(p_ch->cdev, rc);
2711 }
2712 }
2713 else {
2714 CLAW_DBF_TEXT(2, trace, "ReadAct");
2715 }
2716
2717 if (lock==LOCK_YES) {
2718 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2719 }
2720 CLAW_DBF_TEXT(4, trace, "StRdExit");
2721 return;
2722 } /* end of claw_strt_read */
2723
2724 /*-------------------------------------------------------------------*
2725 * claw_strt_out_IO *
2726 * *
2727 *--------------------------------------------------------------------*/
2728
2729 static void
2730 claw_strt_out_IO( struct net_device *dev )
2731 {
2732 int rc = 0;
2733 unsigned long parm;
2734 struct claw_privbk *privptr;
2735 struct chbk *p_ch;
2736 struct ccwbk *p_first_ccw;
2737
2738 if (!dev) {
2739 return;
2740 }
2741 privptr = (struct claw_privbk *)dev->ml_priv;
2742 p_ch=&privptr->channel[WRITE];
2743
2744 CLAW_DBF_TEXT(4, trace, "strt_io");
2745 p_first_ccw=privptr->p_write_active_first;
2746
2747 if (p_ch->claw_state == CLAW_STOP)
2748 return;
2749 if (p_first_ccw == NULL) {
2750 return;
2751 }
2752 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2753 parm = (unsigned long) p_ch;
2754 CLAW_DBF_TEXT(2, trace, "StWrtIO");
2755 rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2756 0xff, 0);
2757 if (rc != 0) {
2758 ccw_check_return_code(p_ch->cdev, rc);
2759 }
2760 }
2761 dev->trans_start = jiffies;
2762 return;
2763 } /* end of claw_strt_out_IO */
2764
2765 /*-------------------------------------------------------------------*
2766 * Free write buffers *
2767 * *
2768 *--------------------------------------------------------------------*/
2769
2770 static void
2771 claw_free_wrt_buf( struct net_device *dev )
2772 {
2773
2774 struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
2775 struct ccwbk*p_first_ccw;
2776 struct ccwbk*p_last_ccw;
2777 struct ccwbk*p_this_ccw;
2778 struct ccwbk*p_next_ccw;
2779
2780 CLAW_DBF_TEXT(4, trace, "freewrtb");
2781 /* scan the write queue to free any completed write packets */
2782 p_first_ccw=NULL;
2783 p_last_ccw=NULL;
2784 p_this_ccw=privptr->p_write_active_first;
2785 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2786 {
2787 p_next_ccw = p_this_ccw->next;
2788 if (((p_next_ccw!=NULL) &&
2789 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2790 ((p_this_ccw == privptr->p_write_active_last) &&
2791 (p_this_ccw->header.flag!=CLAW_PENDING))) {
2792 /* The next CCW is OK or this is */
2793 /* the last CCW...free it @A1A */
2794 privptr->p_write_active_first=p_this_ccw->next;
2795 p_this_ccw->header.flag=CLAW_PENDING;
2796 p_this_ccw->next=privptr->p_write_free_chain;
2797 privptr->p_write_free_chain=p_this_ccw;
2798 ++privptr->write_free_count;
2799 privptr->stats.tx_bytes+= p_this_ccw->write.count;
2800 p_this_ccw=privptr->p_write_active_first;
2801 privptr->stats.tx_packets++;
2802 }
2803 else {
2804 break;
2805 }
2806 }
2807 if (privptr->write_free_count!=0) {
2808 claw_clearbit_busy(TB_NOBUFFER,dev);
2809 }
2810 /* whole chain removed? */
2811 if (privptr->p_write_active_first==NULL) {
2812 privptr->p_write_active_last=NULL;
2813 }
2814 CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
2815 return;
2816 }
2817
2818 /*-------------------------------------------------------------------*
2819 * claw free netdevice *
2820 * *
2821 *--------------------------------------------------------------------*/
2822 static void
2823 claw_free_netdevice(struct net_device * dev, int free_dev)
2824 {
2825 struct claw_privbk *privptr;
2826
2827 CLAW_DBF_TEXT(2, setup, "free_dev");
2828 if (!dev)
2829 return;
2830 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2831 privptr = dev->ml_priv;
2832 if (dev->flags & IFF_RUNNING)
2833 claw_release(dev);
2834 if (privptr) {
2835 privptr->channel[READ].ndev = NULL; /* say it's free */
2836 }
2837 dev->ml_priv = NULL;
2838 #ifdef MODULE
2839 if (free_dev) {
2840 free_netdev(dev);
2841 }
2842 #endif
2843 CLAW_DBF_TEXT(2, setup, "free_ok");
2844 }
2845
2846 /**
2847 * Claw init netdevice
2848 * Initialize everything of the net device except the name and the
2849 * channel structs.
2850 */
2851 static const struct net_device_ops claw_netdev_ops = {
2852 .ndo_open = claw_open,
2853 .ndo_stop = claw_release,
2854 .ndo_get_stats = claw_stats,
2855 .ndo_start_xmit = claw_tx,
2856 .ndo_change_mtu = claw_change_mtu,
2857 };
2858
2859 static void
2860 claw_init_netdevice(struct net_device * dev)
2861 {
2862 CLAW_DBF_TEXT(2, setup, "init_dev");
2863 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2864 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
2865 dev->hard_header_len = 0;
2866 dev->addr_len = 0;
2867 dev->type = ARPHRD_SLIP;
2868 dev->tx_queue_len = 1300;
2869 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2870 dev->netdev_ops = &claw_netdev_ops;
2871 CLAW_DBF_TEXT(2, setup, "initok");
2872 return;
2873 }
2874
2875 /**
2876 * Init a new channel in the privptr->channel[i].
2877 *
2878 * @param cdev The ccw_device to be added.
2879 *
2880 * @return 0 on success, !0 on error.
2881 */
2882 static int
2883 add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2884 {
2885 struct chbk *p_ch;
2886 struct ccw_dev_id dev_id;
2887
2888 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
2889 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
2890 p_ch = &privptr->channel[i];
2891 p_ch->cdev = cdev;
2892 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
2893 ccw_device_get_id(cdev, &dev_id);
2894 p_ch->devno = dev_id.devno;
2895 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
2896 return -ENOMEM;
2897 }
2898 return 0;
2899 }
2900
2901
2902 /**
2903 *
2904 * Setup an interface.
2905 *
2906 * @param cgdev Device to be setup.
2907 *
2908 * @returns 0 on success, !0 on failure.
2909 */
2910 static int
2911 claw_new_device(struct ccwgroup_device *cgdev)
2912 {
2913 struct claw_privbk *privptr;
2914 struct claw_env *p_env;
2915 struct net_device *dev;
2916 int ret;
2917 struct ccw_dev_id dev_id;
2918
2919 dev_info(&cgdev->dev, "add for %s\n",
2920 dev_name(&cgdev->cdev[READ]->dev));
2921 CLAW_DBF_TEXT(2, setup, "new_dev");
2922 privptr = cgdev->dev.driver_data;
2923 cgdev->cdev[READ]->dev.driver_data = privptr;
2924 cgdev->cdev[WRITE]->dev.driver_data = privptr;
2925 if (!privptr)
2926 return -ENODEV;
2927 p_env = privptr->p_env;
2928 ccw_device_get_id(cgdev->cdev[READ], &dev_id);
2929 p_env->devno[READ] = dev_id.devno;
2930 ccw_device_get_id(cgdev->cdev[WRITE], &dev_id);
2931 p_env->devno[WRITE] = dev_id.devno;
2932 ret = add_channel(cgdev->cdev[0],0,privptr);
2933 if (ret == 0)
2934 ret = add_channel(cgdev->cdev[1],1,privptr);
2935 if (ret != 0) {
2936 dev_warn(&cgdev->dev, "Creating a CLAW group device"
2937 " failed with error code %d\n", ret);
2938 goto out;
2939 }
2940 ret = ccw_device_set_online(cgdev->cdev[READ]);
2941 if (ret != 0) {
2942 dev_warn(&cgdev->dev,
2943 "Setting the read subchannel online"
2944 " failed with error code %d\n", ret);
2945 goto out;
2946 }
2947 ret = ccw_device_set_online(cgdev->cdev[WRITE]);
2948 if (ret != 0) {
2949 dev_warn(&cgdev->dev,
2950 "Setting the write subchannel online "
2951 "failed with error code %d\n", ret);
2952 goto out;
2953 }
2954 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
2955 if (!dev) {
2956 dev_warn(&cgdev->dev,
2957 "Activating the CLAW device failed\n");
2958 goto out;
2959 }
2960 dev->ml_priv = privptr;
2961 cgdev->dev.driver_data = privptr;
2962 cgdev->cdev[READ]->dev.driver_data = privptr;
2963 cgdev->cdev[WRITE]->dev.driver_data = privptr;
2964 /* sysfs magic */
2965 SET_NETDEV_DEV(dev, &cgdev->dev);
2966 if (register_netdev(dev) != 0) {
2967 claw_free_netdevice(dev, 1);
2968 CLAW_DBF_TEXT(2, trace, "regfail");
2969 goto out;
2970 }
2971 dev->flags &=~IFF_RUNNING;
2972 if (privptr->buffs_alloc == 0) {
2973 ret=init_ccw_bk(dev);
2974 if (ret !=0) {
2975 unregister_netdev(dev);
2976 claw_free_netdevice(dev,1);
2977 CLAW_DBF_TEXT(2, trace, "ccwmem");
2978 goto out;
2979 }
2980 }
2981 privptr->channel[READ].ndev = dev;
2982 privptr->channel[WRITE].ndev = dev;
2983 privptr->p_env->ndev = dev;
2984
2985 dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d "
2986 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
2987 dev->name, p_env->read_size,
2988 p_env->write_size, p_env->read_buffers,
2989 p_env->write_buffers, p_env->devno[READ],
2990 p_env->devno[WRITE]);
2991 dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
2992 ":%.8s api_type: %.8s\n",
2993 dev->name, p_env->host_name,
2994 p_env->adapter_name , p_env->api_type);
2995 return 0;
2996 out:
2997 ccw_device_set_offline(cgdev->cdev[1]);
2998 ccw_device_set_offline(cgdev->cdev[0]);
2999 return -ENODEV;
3000 }
3001
3002 static void
3003 claw_purge_skb_queue(struct sk_buff_head *q)
3004 {
3005 struct sk_buff *skb;
3006
3007 CLAW_DBF_TEXT(4, trace, "purgque");
3008 while ((skb = skb_dequeue(q))) {
3009 atomic_dec(&skb->users);
3010 dev_kfree_skb_any(skb);
3011 }
3012 }
3013
3014 /**
3015 * Shutdown an interface.
3016 *
3017 * @param cgdev Device to be shut down.
3018 *
3019 * @returns 0 on success, !0 on failure.
3020 */
3021 static int
3022 claw_shutdown_device(struct ccwgroup_device *cgdev)
3023 {
3024 struct claw_privbk *priv;
3025 struct net_device *ndev;
3026 int ret;
3027
3028 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3029 priv = cgdev->dev.driver_data;
3030 if (!priv)
3031 return -ENODEV;
3032 ndev = priv->channel[READ].ndev;
3033 if (ndev) {
3034 /* Close the device */
3035 dev_info(&cgdev->dev, "%s: shutting down \n",
3036 ndev->name);
3037 if (ndev->flags & IFF_RUNNING)
3038 ret = claw_release(ndev);
3039 ndev->flags &=~IFF_RUNNING;
3040 unregister_netdev(ndev);
3041 ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
3042 claw_free_netdevice(ndev, 1);
3043 priv->channel[READ].ndev = NULL;
3044 priv->channel[WRITE].ndev = NULL;
3045 priv->p_env->ndev = NULL;
3046 }
3047 ccw_device_set_offline(cgdev->cdev[1]);
3048 ccw_device_set_offline(cgdev->cdev[0]);
3049 return 0;
3050 }
3051
3052 static void
3053 claw_remove_device(struct ccwgroup_device *cgdev)
3054 {
3055 struct claw_privbk *priv;
3056
3057 BUG_ON(!cgdev);
3058 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3059 priv = cgdev->dev.driver_data;
3060 BUG_ON(!priv);
3061 dev_info(&cgdev->dev, " will be removed.\n");
3062 if (cgdev->state == CCWGROUP_ONLINE)
3063 claw_shutdown_device(cgdev);
3064 claw_remove_files(&cgdev->dev);
3065 kfree(priv->p_mtc_envelope);
3066 priv->p_mtc_envelope=NULL;
3067 kfree(priv->p_env);
3068 priv->p_env=NULL;
3069 kfree(priv->channel[0].irb);
3070 priv->channel[0].irb=NULL;
3071 kfree(priv->channel[1].irb);
3072 priv->channel[1].irb=NULL;
3073 kfree(priv);
3074 cgdev->dev.driver_data=NULL;
3075 cgdev->cdev[READ]->dev.driver_data = NULL;
3076 cgdev->cdev[WRITE]->dev.driver_data = NULL;
3077 put_device(&cgdev->dev);
3078
3079 return;
3080 }
3081
3082
3083 /*
3084 * sysfs attributes
3085 */
3086 static ssize_t
3087 claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
3088 {
3089 struct claw_privbk *priv;
3090 struct claw_env * p_env;
3091
3092 priv = dev->driver_data;
3093 if (!priv)
3094 return -ENODEV;
3095 p_env = priv->p_env;
3096 return sprintf(buf, "%s\n",p_env->host_name);
3097 }
3098
3099 static ssize_t
3100 claw_hname_write(struct device *dev, struct device_attribute *attr,
3101 const char *buf, size_t count)
3102 {
3103 struct claw_privbk *priv;
3104 struct claw_env * p_env;
3105
3106 priv = dev->driver_data;
3107 if (!priv)
3108 return -ENODEV;
3109 p_env = priv->p_env;
3110 if (count > MAX_NAME_LEN+1)
3111 return -EINVAL;
3112 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3113 strncpy(p_env->host_name,buf, count);
3114 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
3115 p_env->host_name[MAX_NAME_LEN] = 0x00;
3116 CLAW_DBF_TEXT(2, setup, "HstnSet");
3117 CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
3118
3119 return count;
3120 }
3121
3122 static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3123
3124 static ssize_t
3125 claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
3126 {
3127 struct claw_privbk *priv;
3128 struct claw_env * p_env;
3129
3130 priv = dev->driver_data;
3131 if (!priv)
3132 return -ENODEV;
3133 p_env = priv->p_env;
3134 return sprintf(buf, "%s\n", p_env->adapter_name);
3135 }
3136
3137 static ssize_t
3138 claw_adname_write(struct device *dev, struct device_attribute *attr,
3139 const char *buf, size_t count)
3140 {
3141 struct claw_privbk *priv;
3142 struct claw_env * p_env;
3143
3144 priv = dev->driver_data;
3145 if (!priv)
3146 return -ENODEV;
3147 p_env = priv->p_env;
3148 if (count > MAX_NAME_LEN+1)
3149 return -EINVAL;
3150 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3151 strncpy(p_env->adapter_name,buf, count);
3152 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3153 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
3154 CLAW_DBF_TEXT(2, setup, "AdnSet");
3155 CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
3156
3157 return count;
3158 }
3159
3160 static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3161
3162 static ssize_t
3163 claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
3164 {
3165 struct claw_privbk *priv;
3166 struct claw_env * p_env;
3167
3168 priv = dev->driver_data;
3169 if (!priv)
3170 return -ENODEV;
3171 p_env = priv->p_env;
3172 return sprintf(buf, "%s\n",
3173 p_env->api_type);
3174 }
3175
3176 static ssize_t
3177 claw_apname_write(struct device *dev, struct device_attribute *attr,
3178 const char *buf, size_t count)
3179 {
3180 struct claw_privbk *priv;
3181 struct claw_env * p_env;
3182
3183 priv = dev->driver_data;
3184 if (!priv)
3185 return -ENODEV;
3186 p_env = priv->p_env;
3187 if (count > MAX_NAME_LEN+1)
3188 return -EINVAL;
3189 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3190 strncpy(p_env->api_type,buf, count);
3191 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
3192 p_env->api_type[MAX_NAME_LEN] = 0x00;
3193 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3194 p_env->read_size=DEF_PACK_BUFSIZE;
3195 p_env->write_size=DEF_PACK_BUFSIZE;
3196 p_env->packing=PACKING_ASK;
3197 CLAW_DBF_TEXT(2, setup, "PACKING");
3198 }
3199 else {
3200 p_env->packing=0;
3201 p_env->read_size=CLAW_FRAME_SIZE;
3202 p_env->write_size=CLAW_FRAME_SIZE;
3203 CLAW_DBF_TEXT(2, setup, "ApiSet");
3204 }
3205 CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
3206 return count;
3207 }
3208
3209 static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3210
3211 static ssize_t
3212 claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3213 {
3214 struct claw_privbk *priv;
3215 struct claw_env * p_env;
3216
3217 priv = dev->driver_data;
3218 if (!priv)
3219 return -ENODEV;
3220 p_env = priv->p_env;
3221 return sprintf(buf, "%d\n", p_env->write_buffers);
3222 }
3223
3224 static ssize_t
3225 claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3226 const char *buf, size_t count)
3227 {
3228 struct claw_privbk *priv;
3229 struct claw_env * p_env;
3230 int nnn,max;
3231
3232 priv = dev->driver_data;
3233 if (!priv)
3234 return -ENODEV;
3235 p_env = priv->p_env;
3236 sscanf(buf, "%i", &nnn);
3237 if (p_env->packing) {
3238 max = 64;
3239 }
3240 else {
3241 max = 512;
3242 }
3243 if ((nnn > max ) || (nnn < 2))
3244 return -EINVAL;
3245 p_env->write_buffers = nnn;
3246 CLAW_DBF_TEXT(2, setup, "Wbufset");
3247 CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
3248 return count;
3249 }
3250
3251 static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3252
3253 static ssize_t
3254 claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3255 {
3256 struct claw_privbk *priv;
3257 struct claw_env * p_env;
3258
3259 priv = dev->driver_data;
3260 if (!priv)
3261 return -ENODEV;
3262 p_env = priv->p_env;
3263 return sprintf(buf, "%d\n", p_env->read_buffers);
3264 }
3265
3266 static ssize_t
3267 claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3268 const char *buf, size_t count)
3269 {
3270 struct claw_privbk *priv;
3271 struct claw_env *p_env;
3272 int nnn,max;
3273
3274 priv = dev->driver_data;
3275 if (!priv)
3276 return -ENODEV;
3277 p_env = priv->p_env;
3278 sscanf(buf, "%i", &nnn);
3279 if (p_env->packing) {
3280 max = 64;
3281 }
3282 else {
3283 max = 512;
3284 }
3285 if ((nnn > max ) || (nnn < 2))
3286 return -EINVAL;
3287 p_env->read_buffers = nnn;
3288 CLAW_DBF_TEXT(2, setup, "Rbufset");
3289 CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
3290 return count;
3291 }
3292
3293 static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3294
3295 static struct attribute *claw_attr[] = {
3296 &dev_attr_read_buffer.attr,
3297 &dev_attr_write_buffer.attr,
3298 &dev_attr_adapter_name.attr,
3299 &dev_attr_api_type.attr,
3300 &dev_attr_host_name.attr,
3301 NULL,
3302 };
3303
3304 static struct attribute_group claw_attr_group = {
3305 .attrs = claw_attr,
3306 };
3307
3308 static int
3309 claw_add_files(struct device *dev)
3310 {
3311 CLAW_DBF_TEXT(2, setup, "add_file");
3312 return sysfs_create_group(&dev->kobj, &claw_attr_group);
3313 }
3314
3315 static void
3316 claw_remove_files(struct device *dev)
3317 {
3318 CLAW_DBF_TEXT(2, setup, "rem_file");
3319 sysfs_remove_group(&dev->kobj, &claw_attr_group);
3320 }
3321
3322 /*--------------------------------------------------------------------*
3323 * claw_init and cleanup *
3324 *---------------------------------------------------------------------*/
3325
3326 static void __exit
3327 claw_cleanup(void)
3328 {
3329 unregister_cu3088_discipline(&claw_group_driver);
3330 claw_unregister_debug_facility();
3331 pr_info("Driver unloaded\n");
3332
3333 }
3334
3335 /**
3336 * Initialize module.
3337 * This is called just after the module is loaded.
3338 *
3339 * @return 0 on success, !0 on error.
3340 */
3341 static int __init
3342 claw_init(void)
3343 {
3344 int ret = 0;
3345
3346 pr_info("Loading %s\n", version);
3347 ret = claw_register_debug_facility();
3348 if (ret) {
3349 pr_err("Registering with the S/390 debug feature"
3350 " failed with error code %d\n", ret);
3351 return ret;
3352 }
3353 CLAW_DBF_TEXT(2, setup, "init_mod");
3354 ret = register_cu3088_discipline(&claw_group_driver);
3355 if (ret) {
3356 CLAW_DBF_TEXT(2, setup, "init_bad");
3357 claw_unregister_debug_facility();
3358 pr_err("Registering with the cu3088 device driver failed "
3359 "with error code %d\n", ret);
3360 }
3361 return ret;
3362 }
3363
3364 module_init(claw_init);
3365 module_exit(claw_cleanup);
3366
3367 MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
3368 MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
3369 "Copyright 2000,2008 IBM Corporation\n");
3370 MODULE_LICENSE("GPL");
Linus' kernel tree