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1/*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
5 * Linux for zSeries version
6 * Copyright IBM Corp. 2002, 2009
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 <linux/kernel_stat.h>
67#include <asm/ccwdev.h>
68#include <asm/ccwgroup.h>
69#include <asm/debug.h>
70#include <asm/idals.h>
71#include <asm/io.h>
72#include <linux/bitops.h>
73#include <linux/ctype.h>
74#include <linux/delay.h>
75#include <linux/errno.h>
76#include <linux/if_arp.h>
77#include <linux/init.h>
78#include <linux/interrupt.h>
79#include <linux/ip.h>
80#include <linux/kernel.h>
81#include <linux/module.h>
82#include <linux/netdevice.h>
83#include <linux/etherdevice.h>
84#include <linux/proc_fs.h>
85#include <linux/sched.h>
86#include <linux/signal.h>
87#include <linux/skbuff.h>
88#include <linux/slab.h>
89#include <linux/string.h>
90#include <linux/tcp.h>
91#include <linux/timer.h>
92#include <linux/types.h>
93
94#include "claw.h"
95
96/*
97 CLAW uses the s390dbf file system see claw_trace and claw_setup
98*/
99
100static char version[] __initdata = "CLAW driver";
101static char debug_buffer[255];
102/**
103 * Debug Facility Stuff
104 */
105static debug_info_t *claw_dbf_setup;
106static debug_info_t *claw_dbf_trace;
107
108/**
109 * CLAW Debug Facility functions
110 */
111static void
112claw_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
120static int
121claw_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
136static inline void
137claw_set_busy(struct net_device *dev)
138{
139 ((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
140 eieio();
141}
142
143static inline void
144claw_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
151static inline int
152claw_check_busy(struct net_device *dev)
153{
154 eieio();
155 return ((struct claw_privbk *) dev->ml_priv)->tbusy;
156}
157
158static inline void
159claw_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
165static inline void
166claw_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
172static inline int
173claw_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
183static int claw_probe(struct ccwgroup_device *cgdev);
184static void claw_remove_device(struct ccwgroup_device *cgdev);
185static void claw_purge_skb_queue(struct sk_buff_head *q);
186static int claw_new_device(struct ccwgroup_device *cgdev);
187static int claw_shutdown_device(struct ccwgroup_device *cgdev);
188static int claw_tx(struct sk_buff *skb, struct net_device *dev);
189static int claw_change_mtu( struct net_device *dev, int new_mtu);
190static int claw_open(struct net_device *dev);
191static void claw_irq_handler(struct ccw_device *cdev,
192 unsigned long intparm, struct irb *irb);
193static void claw_irq_tasklet ( unsigned long data );
194static int claw_release(struct net_device *dev);
195static void claw_write_retry ( struct chbk * p_ch );
196static void claw_write_next ( struct chbk * p_ch );
197static void claw_timer ( struct chbk * p_ch );
198
199/* Functions */
200static int add_claw_reads(struct net_device *dev,
201 struct ccwbk* p_first, struct ccwbk* p_last);
202static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
203static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
204static int find_link(struct net_device *dev, char *host_name, char *ws_name );
205static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
206static int init_ccw_bk(struct net_device *dev);
207static void probe_error( struct ccwgroup_device *cgdev);
208static struct net_device_stats *claw_stats(struct net_device *dev);
209static int pages_to_order_of_mag(int num_of_pages);
210static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
211/* sysfs Functions */
212static ssize_t claw_hname_show(struct device *dev,
213 struct device_attribute *attr, char *buf);
214static ssize_t claw_hname_write(struct device *dev,
215 struct device_attribute *attr,
216 const char *buf, size_t count);
217static ssize_t claw_adname_show(struct device *dev,
218 struct device_attribute *attr, char *buf);
219static ssize_t claw_adname_write(struct device *dev,
220 struct device_attribute *attr,
221 const char *buf, size_t count);
222static ssize_t claw_apname_show(struct device *dev,
223 struct device_attribute *attr, char *buf);
224static ssize_t claw_apname_write(struct device *dev,
225 struct device_attribute *attr,
226 const char *buf, size_t count);
227static ssize_t claw_wbuff_show(struct device *dev,
228 struct device_attribute *attr, char *buf);
229static ssize_t claw_wbuff_write(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count);
232static ssize_t claw_rbuff_show(struct device *dev,
233 struct device_attribute *attr, char *buf);
234static ssize_t claw_rbuff_write(struct device *dev,
235 struct device_attribute *attr,
236 const char *buf, size_t count);
237static int claw_add_files(struct device *dev);
238static void claw_remove_files(struct device *dev);
239
240/* Functions for System Validate */
241static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
242static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
243 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
244static int claw_snd_conn_req(struct net_device *dev, __u8 link);
245static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
246static int claw_snd_sys_validate_rsp(struct net_device *dev,
247 struct clawctl * p_ctl, __u32 return_code);
248static int claw_strt_conn_req(struct net_device *dev );
249static void claw_strt_read(struct net_device *dev, int lock);
250static void claw_strt_out_IO(struct net_device *dev);
251static void claw_free_wrt_buf(struct net_device *dev);
252
253/* Functions for unpack reads */
254static void unpack_read(struct net_device *dev);
255
256static int claw_pm_prepare(struct ccwgroup_device *gdev)
257{
258 return -EPERM;
259}
260
261/* the root device for claw group devices */
262static struct device *claw_root_dev;
263
264/* ccwgroup table */
265
266static struct ccwgroup_driver claw_group_driver = {
267 .driver = {
268 .owner = THIS_MODULE,
269 .name = "claw",
270 },
271 .max_slaves = 2,
272 .driver_id = 0xC3D3C1E6,
273 .probe = claw_probe,
274 .remove = claw_remove_device,
275 .set_online = claw_new_device,
276 .set_offline = claw_shutdown_device,
277 .prepare = claw_pm_prepare,
278};
279
280static struct ccw_device_id claw_ids[] = {
281 {CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw},
282 {},
283};
284MODULE_DEVICE_TABLE(ccw, claw_ids);
285
286static struct ccw_driver claw_ccw_driver = {
287 .driver = {
288 .owner = THIS_MODULE,
289 .name = "claw",
290 },
291 .ids = claw_ids,
292 .probe = ccwgroup_probe_ccwdev,
293 .remove = ccwgroup_remove_ccwdev,
294};
295
296static ssize_t
297claw_driver_group_store(struct device_driver *ddrv, const char *buf,
298 size_t count)
299{
300 int err;
301 err = ccwgroup_create_from_string(claw_root_dev,
302 claw_group_driver.driver_id,
303 &claw_ccw_driver, 2, buf);
304 return err ? err : count;
305}
306
307static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
308
309static struct attribute *claw_group_attrs[] = {
310 &driver_attr_group.attr,
311 NULL,
312};
313
314static struct attribute_group claw_group_attr_group = {
315 .attrs = claw_group_attrs,
316};
317
318static const struct attribute_group *claw_group_attr_groups[] = {
319 &claw_group_attr_group,
320 NULL,
321};
322
323/*
324* Key functions
325*/
326
327/*----------------------------------------------------------------*
328 * claw_probe *
329 * this function is called for each CLAW device. *
330 *----------------------------------------------------------------*/
331static int
332claw_probe(struct ccwgroup_device *cgdev)
333{
334 int rc;
335 struct claw_privbk *privptr=NULL;
336
337 CLAW_DBF_TEXT(2, setup, "probe");
338 if (!get_device(&cgdev->dev))
339 return -ENODEV;
340 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
341 dev_set_drvdata(&cgdev->dev, privptr);
342 if (privptr == NULL) {
343 probe_error(cgdev);
344 put_device(&cgdev->dev);
345 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
346 return -ENOMEM;
347 }
348 privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
349 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
350 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
351 probe_error(cgdev);
352 put_device(&cgdev->dev);
353 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
354 return -ENOMEM;
355 }
356 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
357 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
358 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
359 privptr->p_env->packing = 0;
360 privptr->p_env->write_buffers = 5;
361 privptr->p_env->read_buffers = 5;
362 privptr->p_env->read_size = CLAW_FRAME_SIZE;
363 privptr->p_env->write_size = CLAW_FRAME_SIZE;
364 rc = claw_add_files(&cgdev->dev);
365 if (rc) {
366 probe_error(cgdev);
367 put_device(&cgdev->dev);
368 dev_err(&cgdev->dev, "Creating the /proc files for a new"
369 " CLAW device failed\n");
370 CLAW_DBF_TEXT_(2, setup, "probex%d", rc);
371 return rc;
372 }
373 privptr->p_env->p_priv = privptr;
374 cgdev->cdev[0]->handler = claw_irq_handler;
375 cgdev->cdev[1]->handler = claw_irq_handler;
376 CLAW_DBF_TEXT(2, setup, "prbext 0");
377
378 return 0;
379} /* end of claw_probe */
380
381/*-------------------------------------------------------------------*
382 * claw_tx *
383 *-------------------------------------------------------------------*/
384
385static int
386claw_tx(struct sk_buff *skb, struct net_device *dev)
387{
388 int rc;
389 struct claw_privbk *privptr = dev->ml_priv;
390 unsigned long saveflags;
391 struct chbk *p_ch;
392
393 CLAW_DBF_TEXT(4, trace, "claw_tx");
394 p_ch = &privptr->channel[WRITE_CHANNEL];
395 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
396 rc=claw_hw_tx( skb, dev, 1 );
397 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
398 CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
399 if (rc)
400 rc = NETDEV_TX_BUSY;
401 else
402 rc = NETDEV_TX_OK;
403 return rc;
404} /* end of claw_tx */
405
406/*------------------------------------------------------------------*
407 * pack the collect queue into an skb and return it *
408 * If not packing just return the top skb from the queue *
409 *------------------------------------------------------------------*/
410
411static struct sk_buff *
412claw_pack_skb(struct claw_privbk *privptr)
413{
414 struct sk_buff *new_skb,*held_skb;
415 struct chbk *p_ch = &privptr->channel[WRITE_CHANNEL];
416 struct claw_env *p_env = privptr->p_env;
417 int pkt_cnt,pk_ind,so_far;
418
419 new_skb = NULL; /* assume no dice */
420 pkt_cnt = 0;
421 CLAW_DBF_TEXT(4, trace, "PackSKBe");
422 if (!skb_queue_empty(&p_ch->collect_queue)) {
423 /* some data */
424 held_skb = skb_dequeue(&p_ch->collect_queue);
425 if (held_skb)
426 dev_kfree_skb_any(held_skb);
427 else
428 return NULL;
429 if (p_env->packing != DO_PACKED)
430 return held_skb;
431 /* get a new SKB we will pack at least one */
432 new_skb = dev_alloc_skb(p_env->write_size);
433 if (new_skb == NULL) {
434 atomic_inc(&held_skb->users);
435 skb_queue_head(&p_ch->collect_queue,held_skb);
436 return NULL;
437 }
438 /* we have packed packet and a place to put it */
439 pk_ind = 1;
440 so_far = 0;
441 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
442 while ((pk_ind) && (held_skb != NULL)) {
443 if (held_skb->len+so_far <= p_env->write_size-8) {
444 memcpy(skb_put(new_skb,held_skb->len),
445 held_skb->data,held_skb->len);
446 privptr->stats.tx_packets++;
447 so_far += held_skb->len;
448 pkt_cnt++;
449 dev_kfree_skb_any(held_skb);
450 held_skb = skb_dequeue(&p_ch->collect_queue);
451 if (held_skb)
452 atomic_dec(&held_skb->users);
453 } else {
454 pk_ind = 0;
455 atomic_inc(&held_skb->users);
456 skb_queue_head(&p_ch->collect_queue,held_skb);
457 }
458 }
459 }
460 CLAW_DBF_TEXT(4, trace, "PackSKBx");
461 return new_skb;
462}
463
464/*-------------------------------------------------------------------*
465 * claw_change_mtu *
466 * *
467 *-------------------------------------------------------------------*/
468
469static int
470claw_change_mtu(struct net_device *dev, int new_mtu)
471{
472 struct claw_privbk *privptr = dev->ml_priv;
473 int buff_size;
474 CLAW_DBF_TEXT(4, trace, "setmtu");
475 buff_size = privptr->p_env->write_size;
476 if ((new_mtu < 60) || (new_mtu > buff_size)) {
477 return -EINVAL;
478 }
479 dev->mtu = new_mtu;
480 return 0;
481} /* end of claw_change_mtu */
482
483
484/*-------------------------------------------------------------------*
485 * claw_open *
486 * *
487 *-------------------------------------------------------------------*/
488static int
489claw_open(struct net_device *dev)
490{
491
492 int rc;
493 int i;
494 unsigned long saveflags=0;
495 unsigned long parm;
496 struct claw_privbk *privptr;
497 DECLARE_WAITQUEUE(wait, current);
498 struct timer_list timer;
499 struct ccwbk *p_buf;
500
501 CLAW_DBF_TEXT(4, trace, "open");
502 privptr = (struct claw_privbk *)dev->ml_priv;
503 /* allocate and initialize CCW blocks */
504 if (privptr->buffs_alloc == 0) {
505 rc=init_ccw_bk(dev);
506 if (rc) {
507 CLAW_DBF_TEXT(2, trace, "openmem");
508 return -ENOMEM;
509 }
510 }
511 privptr->system_validate_comp=0;
512 privptr->release_pend=0;
513 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
514 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
515 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
516 privptr->p_env->packing=PACKING_ASK;
517 } else {
518 privptr->p_env->packing=0;
519 privptr->p_env->read_size=CLAW_FRAME_SIZE;
520 privptr->p_env->write_size=CLAW_FRAME_SIZE;
521 }
522 claw_set_busy(dev);
523 tasklet_init(&privptr->channel[READ_CHANNEL].tasklet, claw_irq_tasklet,
524 (unsigned long) &privptr->channel[READ_CHANNEL]);
525 for ( i = 0; i < 2; i++) {
526 CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
527 init_waitqueue_head(&privptr->channel[i].wait);
528 /* skb_queue_head_init(&p_ch->io_queue); */
529 if (i == WRITE_CHANNEL)
530 skb_queue_head_init(
531 &privptr->channel[WRITE_CHANNEL].collect_queue);
532 privptr->channel[i].flag_a = 0;
533 privptr->channel[i].IO_active = 0;
534 privptr->channel[i].flag &= ~CLAW_TIMER;
535 init_timer(&timer);
536 timer.function = (void *)claw_timer;
537 timer.data = (unsigned long)(&privptr->channel[i]);
538 timer.expires = jiffies + 15*HZ;
539 add_timer(&timer);
540 spin_lock_irqsave(get_ccwdev_lock(
541 privptr->channel[i].cdev), saveflags);
542 parm = (unsigned long) &privptr->channel[i];
543 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
544 rc = 0;
545 add_wait_queue(&privptr->channel[i].wait, &wait);
546 rc = ccw_device_halt(
547 (struct ccw_device *)privptr->channel[i].cdev,parm);
548 set_current_state(TASK_INTERRUPTIBLE);
549 spin_unlock_irqrestore(
550 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
551 schedule();
552 set_current_state(TASK_RUNNING);
553 remove_wait_queue(&privptr->channel[i].wait, &wait);
554 if(rc != 0)
555 ccw_check_return_code(privptr->channel[i].cdev, rc);
556 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
557 del_timer(&timer);
558 }
559 if ((((privptr->channel[READ_CHANNEL].last_dstat |
560 privptr->channel[WRITE_CHANNEL].last_dstat) &
561 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
562 (((privptr->channel[READ_CHANNEL].flag |
563 privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) {
564 dev_info(&privptr->channel[READ_CHANNEL].cdev->dev,
565 "%s: remote side is not ready\n", dev->name);
566 CLAW_DBF_TEXT(2, trace, "notrdy");
567
568 for ( i = 0; i < 2; i++) {
569 spin_lock_irqsave(
570 get_ccwdev_lock(privptr->channel[i].cdev),
571 saveflags);
572 parm = (unsigned long) &privptr->channel[i];
573 privptr->channel[i].claw_state = CLAW_STOP;
574 rc = ccw_device_halt(
575 (struct ccw_device *)&privptr->channel[i].cdev,
576 parm);
577 spin_unlock_irqrestore(
578 get_ccwdev_lock(privptr->channel[i].cdev),
579 saveflags);
580 if (rc != 0) {
581 ccw_check_return_code(
582 privptr->channel[i].cdev, rc);
583 }
584 }
585 free_pages((unsigned long)privptr->p_buff_ccw,
586 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
587 if (privptr->p_env->read_size < PAGE_SIZE) {
588 free_pages((unsigned long)privptr->p_buff_read,
589 (int)pages_to_order_of_mag(
590 privptr->p_buff_read_num));
591 }
592 else {
593 p_buf=privptr->p_read_active_first;
594 while (p_buf!=NULL) {
595 free_pages((unsigned long)p_buf->p_buffer,
596 (int)pages_to_order_of_mag(
597 privptr->p_buff_pages_perread ));
598 p_buf=p_buf->next;
599 }
600 }
601 if (privptr->p_env->write_size < PAGE_SIZE ) {
602 free_pages((unsigned long)privptr->p_buff_write,
603 (int)pages_to_order_of_mag(
604 privptr->p_buff_write_num));
605 }
606 else {
607 p_buf=privptr->p_write_active_first;
608 while (p_buf!=NULL) {
609 free_pages((unsigned long)p_buf->p_buffer,
610 (int)pages_to_order_of_mag(
611 privptr->p_buff_pages_perwrite ));
612 p_buf=p_buf->next;
613 }
614 }
615 privptr->buffs_alloc = 0;
616 privptr->channel[READ_CHANNEL].flag = 0x00;
617 privptr->channel[WRITE_CHANNEL].flag = 0x00;
618 privptr->p_buff_ccw=NULL;
619 privptr->p_buff_read=NULL;
620 privptr->p_buff_write=NULL;
621 claw_clear_busy(dev);
622 CLAW_DBF_TEXT(2, trace, "open EIO");
623 return -EIO;
624 }
625
626 /* Send SystemValidate command */
627
628 claw_clear_busy(dev);
629 CLAW_DBF_TEXT(4, trace, "openok");
630 return 0;
631} /* end of claw_open */
632
633/*-------------------------------------------------------------------*
634* *
635* claw_irq_handler *
636* *
637*--------------------------------------------------------------------*/
638static void
639claw_irq_handler(struct ccw_device *cdev,
640 unsigned long intparm, struct irb *irb)
641{
642 struct chbk *p_ch = NULL;
643 struct claw_privbk *privptr = NULL;
644 struct net_device *dev = NULL;
645 struct claw_env *p_env;
646 struct chbk *p_ch_r=NULL;
647
648 kstat_cpu(smp_processor_id()).irqs[IOINT_CLW]++;
649 CLAW_DBF_TEXT(4, trace, "clawirq");
650 /* Bypass all 'unsolicited interrupts' */
651 privptr = dev_get_drvdata(&cdev->dev);
652 if (!privptr) {
653 dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
654 " IRQ, c-%02x d-%02x\n",
655 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
656 CLAW_DBF_TEXT(2, trace, "badirq");
657 return;
658 }
659
660 /* Try to extract channel from driver data. */
661 if (privptr->channel[READ_CHANNEL].cdev == cdev)
662 p_ch = &privptr->channel[READ_CHANNEL];
663 else if (privptr->channel[WRITE_CHANNEL].cdev == cdev)
664 p_ch = &privptr->channel[WRITE_CHANNEL];
665 else {
666 dev_warn(&cdev->dev, "The device is not a CLAW device\n");
667 CLAW_DBF_TEXT(2, trace, "badchan");
668 return;
669 }
670 CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
671
672 dev = (struct net_device *) (p_ch->ndev);
673 p_env=privptr->p_env;
674
675 /* Copy interruption response block. */
676 memcpy(p_ch->irb, irb, sizeof(struct irb));
677
678 /* Check for good subchannel return code, otherwise info message */
679 if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
680 dev_info(&cdev->dev,
681 "%s: subchannel check for device: %04x -"
682 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
683 dev->name, p_ch->devno,
684 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
685 irb->scsw.cmd.cpa);
686 CLAW_DBF_TEXT(2, trace, "chanchk");
687 /* return; */
688 }
689
690 /* Check the reason-code of a unit check */
691 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
692 ccw_check_unit_check(p_ch, irb->ecw[0]);
693
694 /* State machine to bring the connection up, down and to restart */
695 p_ch->last_dstat = irb->scsw.cmd.dstat;
696
697 switch (p_ch->claw_state) {
698 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
699 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
700 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
701 (p_ch->irb->scsw.cmd.stctl ==
702 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
703 return;
704 wake_up(&p_ch->wait); /* wake up claw_release */
705 CLAW_DBF_TEXT(4, trace, "stop");
706 return;
707 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
708 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
709 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
710 (p_ch->irb->scsw.cmd.stctl ==
711 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
712 CLAW_DBF_TEXT(4, trace, "haltio");
713 return;
714 }
715 if (p_ch->flag == CLAW_READ) {
716 p_ch->claw_state = CLAW_START_READ;
717 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
718 } else if (p_ch->flag == CLAW_WRITE) {
719 p_ch->claw_state = CLAW_START_WRITE;
720 /* send SYSTEM_VALIDATE */
721 claw_strt_read(dev, LOCK_NO);
722 claw_send_control(dev,
723 SYSTEM_VALIDATE_REQUEST,
724 0, 0, 0,
725 p_env->host_name,
726 p_env->adapter_name);
727 } else {
728 dev_warn(&cdev->dev, "The CLAW device received"
729 " an unexpected IRQ, "
730 "c-%02x d-%02x\n",
731 irb->scsw.cmd.cstat,
732 irb->scsw.cmd.dstat);
733 return;
734 }
735 CLAW_DBF_TEXT(4, trace, "haltio");
736 return;
737 case CLAW_START_READ:
738 CLAW_DBF_TEXT(4, trace, "ReadIRQ");
739 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
740 clear_bit(0, (void *)&p_ch->IO_active);
741 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
742 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
743 (p_ch->irb->ecw[0]) == 0) {
744 privptr->stats.rx_errors++;
745 dev_info(&cdev->dev,
746 "%s: Restart is required after remote "
747 "side recovers \n",
748 dev->name);
749 }
750 CLAW_DBF_TEXT(4, trace, "notrdy");
751 return;
752 }
753 if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
754 (p_ch->irb->scsw.cmd.dstat == 0)) {
755 if (test_and_set_bit(CLAW_BH_ACTIVE,
756 (void *)&p_ch->flag_a) == 0)
757 tasklet_schedule(&p_ch->tasklet);
758 else
759 CLAW_DBF_TEXT(4, trace, "PCINoBH");
760 CLAW_DBF_TEXT(4, trace, "PCI_read");
761 return;
762 }
763 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
764 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
765 (p_ch->irb->scsw.cmd.stctl ==
766 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
767 CLAW_DBF_TEXT(4, trace, "SPend_rd");
768 return;
769 }
770 clear_bit(0, (void *)&p_ch->IO_active);
771 claw_clearbit_busy(TB_RETRY, dev);
772 if (test_and_set_bit(CLAW_BH_ACTIVE,
773 (void *)&p_ch->flag_a) == 0)
774 tasklet_schedule(&p_ch->tasklet);
775 else
776 CLAW_DBF_TEXT(4, trace, "RdBHAct");
777 CLAW_DBF_TEXT(4, trace, "RdIRQXit");
778 return;
779 case CLAW_START_WRITE:
780 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
781 dev_info(&cdev->dev,
782 "%s: Unit Check Occurred in "
783 "write channel\n", dev->name);
784 clear_bit(0, (void *)&p_ch->IO_active);
785 if (p_ch->irb->ecw[0] & 0x80) {
786 dev_info(&cdev->dev,
787 "%s: Resetting Event "
788 "occurred:\n", dev->name);
789 init_timer(&p_ch->timer);
790 p_ch->timer.function =
791 (void *)claw_write_retry;
792 p_ch->timer.data = (unsigned long)p_ch;
793 p_ch->timer.expires = jiffies + 10*HZ;
794 add_timer(&p_ch->timer);
795 dev_info(&cdev->dev,
796 "%s: write connection "
797 "restarting\n", dev->name);
798 }
799 CLAW_DBF_TEXT(4, trace, "rstrtwrt");
800 return;
801 }
802 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
803 clear_bit(0, (void *)&p_ch->IO_active);
804 dev_info(&cdev->dev,
805 "%s: Unit Exception "
806 "occurred in write channel\n",
807 dev->name);
808 }
809 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
810 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
811 (p_ch->irb->scsw.cmd.stctl ==
812 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
813 CLAW_DBF_TEXT(4, trace, "writeUE");
814 return;
815 }
816 clear_bit(0, (void *)&p_ch->IO_active);
817 if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
818 claw_write_next(p_ch);
819 claw_clearbit_busy(TB_TX, dev);
820 claw_clear_busy(dev);
821 }
822 p_ch_r = (struct chbk *)&privptr->channel[READ_CHANNEL];
823 if (test_and_set_bit(CLAW_BH_ACTIVE,
824 (void *)&p_ch_r->flag_a) == 0)
825 tasklet_schedule(&p_ch_r->tasklet);
826 CLAW_DBF_TEXT(4, trace, "StWtExit");
827 return;
828 default:
829 dev_warn(&cdev->dev,
830 "The CLAW device for %s received an unexpected IRQ\n",
831 dev->name);
832 CLAW_DBF_TEXT(2, trace, "badIRQ");
833 return;
834 }
835
836} /* end of claw_irq_handler */
837
838
839/*-------------------------------------------------------------------*
840* claw_irq_tasklet *
841* *
842*--------------------------------------------------------------------*/
843static void
844claw_irq_tasklet ( unsigned long data )
845{
846 struct chbk * p_ch;
847 struct net_device *dev;
848
849 p_ch = (struct chbk *) data;
850 dev = (struct net_device *)p_ch->ndev;
851 CLAW_DBF_TEXT(4, trace, "IRQtask");
852 unpack_read(dev);
853 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
854 CLAW_DBF_TEXT(4, trace, "TskletXt");
855 return;
856} /* end of claw_irq_bh */
857
858/*-------------------------------------------------------------------*
859* claw_release *
860* *
861*--------------------------------------------------------------------*/
862static int
863claw_release(struct net_device *dev)
864{
865 int rc;
866 int i;
867 unsigned long saveflags;
868 unsigned long parm;
869 struct claw_privbk *privptr;
870 DECLARE_WAITQUEUE(wait, current);
871 struct ccwbk* p_this_ccw;
872 struct ccwbk* p_buf;
873
874 if (!dev)
875 return 0;
876 privptr = (struct claw_privbk *)dev->ml_priv;
877 if (!privptr)
878 return 0;
879 CLAW_DBF_TEXT(4, trace, "release");
880 privptr->release_pend=1;
881 claw_setbit_busy(TB_STOP,dev);
882 for ( i = 1; i >=0 ; i--) {
883 spin_lock_irqsave(
884 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
885 /* del_timer(&privptr->channel[READ_CHANNEL].timer); */
886 privptr->channel[i].claw_state = CLAW_STOP;
887 privptr->channel[i].IO_active = 0;
888 parm = (unsigned long) &privptr->channel[i];
889 if (i == WRITE_CHANNEL)
890 claw_purge_skb_queue(
891 &privptr->channel[WRITE_CHANNEL].collect_queue);
892 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
893 if (privptr->system_validate_comp==0x00) /* never opened? */
894 init_waitqueue_head(&privptr->channel[i].wait);
895 add_wait_queue(&privptr->channel[i].wait, &wait);
896 set_current_state(TASK_INTERRUPTIBLE);
897 spin_unlock_irqrestore(
898 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
899 schedule();
900 set_current_state(TASK_RUNNING);
901 remove_wait_queue(&privptr->channel[i].wait, &wait);
902 if (rc != 0) {
903 ccw_check_return_code(privptr->channel[i].cdev, rc);
904 }
905 }
906 if (privptr->pk_skb != NULL) {
907 dev_kfree_skb_any(privptr->pk_skb);
908 privptr->pk_skb = NULL;
909 }
910 if(privptr->buffs_alloc != 1) {
911 CLAW_DBF_TEXT(4, trace, "none2fre");
912 return 0;
913 }
914 CLAW_DBF_TEXT(4, trace, "freebufs");
915 if (privptr->p_buff_ccw != NULL) {
916 free_pages((unsigned long)privptr->p_buff_ccw,
917 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
918 }
919 CLAW_DBF_TEXT(4, trace, "freeread");
920 if (privptr->p_env->read_size < PAGE_SIZE) {
921 if (privptr->p_buff_read != NULL) {
922 free_pages((unsigned long)privptr->p_buff_read,
923 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
924 }
925 }
926 else {
927 p_buf=privptr->p_read_active_first;
928 while (p_buf!=NULL) {
929 free_pages((unsigned long)p_buf->p_buffer,
930 (int)pages_to_order_of_mag(
931 privptr->p_buff_pages_perread ));
932 p_buf=p_buf->next;
933 }
934 }
935 CLAW_DBF_TEXT(4, trace, "freewrit");
936 if (privptr->p_env->write_size < PAGE_SIZE ) {
937 free_pages((unsigned long)privptr->p_buff_write,
938 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
939 }
940 else {
941 p_buf=privptr->p_write_active_first;
942 while (p_buf!=NULL) {
943 free_pages((unsigned long)p_buf->p_buffer,
944 (int)pages_to_order_of_mag(
945 privptr->p_buff_pages_perwrite ));
946 p_buf=p_buf->next;
947 }
948 }
949 CLAW_DBF_TEXT(4, trace, "clearptr");
950 privptr->buffs_alloc = 0;
951 privptr->p_buff_ccw=NULL;
952 privptr->p_buff_read=NULL;
953 privptr->p_buff_write=NULL;
954 privptr->system_validate_comp=0;
955 privptr->release_pend=0;
956 /* Remove any writes that were pending and reset all reads */
957 p_this_ccw=privptr->p_read_active_first;
958 while (p_this_ccw!=NULL) {
959 p_this_ccw->header.length=0xffff;
960 p_this_ccw->header.opcode=0xff;
961 p_this_ccw->header.flag=0x00;
962 p_this_ccw=p_this_ccw->next;
963 }
964
965 while (privptr->p_write_active_first!=NULL) {
966 p_this_ccw=privptr->p_write_active_first;
967 p_this_ccw->header.flag=CLAW_PENDING;
968 privptr->p_write_active_first=p_this_ccw->next;
969 p_this_ccw->next=privptr->p_write_free_chain;
970 privptr->p_write_free_chain=p_this_ccw;
971 ++privptr->write_free_count;
972 }
973 privptr->p_write_active_last=NULL;
974 privptr->mtc_logical_link = -1;
975 privptr->mtc_skipping = 1;
976 privptr->mtc_offset=0;
977
978 if (((privptr->channel[READ_CHANNEL].last_dstat |
979 privptr->channel[WRITE_CHANNEL].last_dstat) &
980 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
981 dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev,
982 "Deactivating %s completed with incorrect"
983 " subchannel status "
984 "(read %02x, write %02x)\n",
985 dev->name,
986 privptr->channel[READ_CHANNEL].last_dstat,
987 privptr->channel[WRITE_CHANNEL].last_dstat);
988 CLAW_DBF_TEXT(2, trace, "badclose");
989 }
990 CLAW_DBF_TEXT(4, trace, "rlsexit");
991 return 0;
992} /* end of claw_release */
993
994/*-------------------------------------------------------------------*
995* claw_write_retry *
996* *
997*--------------------------------------------------------------------*/
998
999static void
1000claw_write_retry ( struct chbk *p_ch )
1001{
1002
1003 struct net_device *dev=p_ch->ndev;
1004
1005 CLAW_DBF_TEXT(4, trace, "w_retry");
1006 if (p_ch->claw_state == CLAW_STOP) {
1007 return;
1008 }
1009 claw_strt_out_IO( dev );
1010 CLAW_DBF_TEXT(4, trace, "rtry_xit");
1011 return;
1012} /* end of claw_write_retry */
1013
1014
1015/*-------------------------------------------------------------------*
1016* claw_write_next *
1017* *
1018*--------------------------------------------------------------------*/
1019
1020static void
1021claw_write_next ( struct chbk * p_ch )
1022{
1023
1024 struct net_device *dev;
1025 struct claw_privbk *privptr=NULL;
1026 struct sk_buff *pk_skb;
1027
1028 CLAW_DBF_TEXT(4, trace, "claw_wrt");
1029 if (p_ch->claw_state == CLAW_STOP)
1030 return;
1031 dev = (struct net_device *) p_ch->ndev;
1032 privptr = (struct claw_privbk *) dev->ml_priv;
1033 claw_free_wrt_buf( dev );
1034 if ((privptr->write_free_count > 0) &&
1035 !skb_queue_empty(&p_ch->collect_queue)) {
1036 pk_skb = claw_pack_skb(privptr);
1037 while (pk_skb != NULL) {
1038 claw_hw_tx(pk_skb, dev, 1);
1039 if (privptr->write_free_count > 0) {
1040 pk_skb = claw_pack_skb(privptr);
1041 } else
1042 pk_skb = NULL;
1043 }
1044 }
1045 if (privptr->p_write_active_first!=NULL) {
1046 claw_strt_out_IO(dev);
1047 }
1048 return;
1049} /* end of claw_write_next */
1050
1051/*-------------------------------------------------------------------*
1052* *
1053* claw_timer *
1054*--------------------------------------------------------------------*/
1055
1056static void
1057claw_timer ( struct chbk * p_ch )
1058{
1059 CLAW_DBF_TEXT(4, trace, "timer");
1060 p_ch->flag |= CLAW_TIMER;
1061 wake_up(&p_ch->wait);
1062 return;
1063} /* end of claw_timer */
1064
1065/*
1066*
1067* functions
1068*/
1069
1070
1071/*-------------------------------------------------------------------*
1072* *
1073* pages_to_order_of_mag *
1074* *
1075* takes a number of pages from 1 to 512 and returns the *
1076* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1077* of magnitude get_free_pages() has an upper order of 9 *
1078*--------------------------------------------------------------------*/
1079
1080static int
1081pages_to_order_of_mag(int num_of_pages)
1082{
1083 int order_of_mag=1; /* assume 2 pages */
1084 int nump;
1085
1086 CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
1087 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1088 /* 512 pages = 2Meg on 4k page systems */
1089 if (num_of_pages >= 512) {return 9; }
1090 /* we have two or more pages order is at least 1 */
1091 for (nump=2 ;nump <= 512;nump*=2) {
1092 if (num_of_pages <= nump)
1093 break;
1094 order_of_mag +=1;
1095 }
1096 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1097 CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1098 return order_of_mag;
1099}
1100
1101/*-------------------------------------------------------------------*
1102* *
1103* add_claw_reads *
1104* *
1105*--------------------------------------------------------------------*/
1106static int
1107add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1108 struct ccwbk* p_last)
1109{
1110 struct claw_privbk *privptr;
1111 struct ccw1 temp_ccw;
1112 struct endccw * p_end;
1113 CLAW_DBF_TEXT(4, trace, "addreads");
1114 privptr = dev->ml_priv;
1115 p_end = privptr->p_end_ccw;
1116
1117 /* first CCW and last CCW contains a new set of read channel programs
1118 * to apend the running channel programs
1119 */
1120 if ( p_first==NULL) {
1121 CLAW_DBF_TEXT(4, trace, "addexit");
1122 return 0;
1123 }
1124
1125 /* set up ending CCW sequence for this segment */
1126 if (p_end->read1) {
1127 p_end->read1=0x00; /* second ending CCW is now active */
1128 /* reset ending CCWs and setup TIC CCWs */
1129 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1130 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1131 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1132 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1133 p_end->read2_nop2.cda=0;
1134 p_end->read2_nop2.count=1;
1135 }
1136 else {
1137 p_end->read1=0x01; /* first ending CCW is now active */
1138 /* reset ending CCWs and setup TIC CCWs */
1139 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1140 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1141 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1142 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1143 p_end->read1_nop2.cda=0;
1144 p_end->read1_nop2.count=1;
1145 }
1146
1147 if ( privptr-> p_read_active_first ==NULL ) {
1148 privptr->p_read_active_first = p_first; /* set new first */
1149 privptr->p_read_active_last = p_last; /* set new last */
1150 }
1151 else {
1152
1153 /* set up TIC ccw */
1154 temp_ccw.cda= (__u32)__pa(&p_first->read);
1155 temp_ccw.count=0;
1156 temp_ccw.flags=0;
1157 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1158
1159
1160 if (p_end->read1) {
1161
1162 /* first set of CCW's is chained to the new read */
1163 /* chain, so the second set is chained to the active chain. */
1164 /* Therefore modify the second set to point to the new */
1165 /* read chain set up TIC CCWs */
1166 /* make sure we update the CCW so channel doesn't fetch it */
1167 /* when it's only half done */
1168 memcpy( &p_end->read2_nop2, &temp_ccw ,
1169 sizeof(struct ccw1));
1170 privptr->p_read_active_last->r_TIC_1.cda=
1171 (__u32)__pa(&p_first->read);
1172 privptr->p_read_active_last->r_TIC_2.cda=
1173 (__u32)__pa(&p_first->read);
1174 }
1175 else {
1176 /* make sure we update the CCW so channel doesn't */
1177 /* fetch it when it is only half done */
1178 memcpy( &p_end->read1_nop2, &temp_ccw ,
1179 sizeof(struct ccw1));
1180 privptr->p_read_active_last->r_TIC_1.cda=
1181 (__u32)__pa(&p_first->read);
1182 privptr->p_read_active_last->r_TIC_2.cda=
1183 (__u32)__pa(&p_first->read);
1184 }
1185 /* chain in new set of blocks */
1186 privptr->p_read_active_last->next = p_first;
1187 privptr->p_read_active_last=p_last;
1188 } /* end of if ( privptr-> p_read_active_first ==NULL) */
1189 CLAW_DBF_TEXT(4, trace, "addexit");
1190 return 0;
1191} /* end of add_claw_reads */
1192
1193/*-------------------------------------------------------------------*
1194 * ccw_check_return_code *
1195 * *
1196 *-------------------------------------------------------------------*/
1197
1198static void
1199ccw_check_return_code(struct ccw_device *cdev, int return_code)
1200{
1201 CLAW_DBF_TEXT(4, trace, "ccwret");
1202 if (return_code != 0) {
1203 switch (return_code) {
1204 case -EBUSY: /* BUSY is a transient state no action needed */
1205 break;
1206 case -ENODEV:
1207 dev_err(&cdev->dev, "The remote channel adapter is not"
1208 " available\n");
1209 break;
1210 case -EINVAL:
1211 dev_err(&cdev->dev,
1212 "The status of the remote channel adapter"
1213 " is not valid\n");
1214 break;
1215 default:
1216 dev_err(&cdev->dev, "The common device layer"
1217 " returned error code %d\n",
1218 return_code);
1219 }
1220 }
1221 CLAW_DBF_TEXT(4, trace, "ccwret");
1222} /* end of ccw_check_return_code */
1223
1224/*-------------------------------------------------------------------*
1225* ccw_check_unit_check *
1226*--------------------------------------------------------------------*/
1227
1228static void
1229ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1230{
1231 struct net_device *ndev = p_ch->ndev;
1232 struct device *dev = &p_ch->cdev->dev;
1233
1234 CLAW_DBF_TEXT(4, trace, "unitchek");
1235 dev_warn(dev, "The communication peer of %s disconnected\n",
1236 ndev->name);
1237
1238 if (sense & 0x40) {
1239 if (sense & 0x01) {
1240 dev_warn(dev, "The remote channel adapter for"
1241 " %s has been reset\n",
1242 ndev->name);
1243 }
1244 } else if (sense & 0x20) {
1245 if (sense & 0x04) {
1246 dev_warn(dev, "A data streaming timeout occurred"
1247 " for %s\n",
1248 ndev->name);
1249 } else if (sense & 0x10) {
1250 dev_warn(dev, "The remote channel adapter for %s"
1251 " is faulty\n",
1252 ndev->name);
1253 } else {
1254 dev_warn(dev, "A data transfer parity error occurred"
1255 " for %s\n",
1256 ndev->name);
1257 }
1258 } else if (sense & 0x10) {
1259 dev_warn(dev, "A read data parity error occurred"
1260 " for %s\n",
1261 ndev->name);
1262 }
1263
1264} /* end of ccw_check_unit_check */
1265
1266/*-------------------------------------------------------------------*
1267* find_link *
1268*--------------------------------------------------------------------*/
1269static int
1270find_link(struct net_device *dev, char *host_name, char *ws_name )
1271{
1272 struct claw_privbk *privptr;
1273 struct claw_env *p_env;
1274 int rc=0;
1275
1276 CLAW_DBF_TEXT(2, setup, "findlink");
1277 privptr = dev->ml_priv;
1278 p_env=privptr->p_env;
1279 switch (p_env->packing)
1280 {
1281 case PACKING_ASK:
1282 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1283 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1284 rc = EINVAL;
1285 break;
1286 case DO_PACKED:
1287 case PACK_SEND:
1288 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1289 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1290 rc = EINVAL;
1291 break;
1292 default:
1293 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1294 (memcmp(p_env->api_type , ws_name, 8)!=0))
1295 rc = EINVAL;
1296 break;
1297 }
1298
1299 return rc;
1300} /* end of find_link */
1301
1302/*-------------------------------------------------------------------*
1303 * claw_hw_tx *
1304 * *
1305 * *
1306 *-------------------------------------------------------------------*/
1307
1308static int
1309claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1310{
1311 int rc=0;
1312 struct claw_privbk *privptr;
1313 struct ccwbk *p_this_ccw;
1314 struct ccwbk *p_first_ccw;
1315 struct ccwbk *p_last_ccw;
1316 __u32 numBuffers;
1317 signed long len_of_data;
1318 unsigned long bytesInThisBuffer;
1319 unsigned char *pDataAddress;
1320 struct endccw *pEnd;
1321 struct ccw1 tempCCW;
1322 struct claw_env *p_env;
1323 struct clawph *pk_head;
1324 struct chbk *ch;
1325
1326 CLAW_DBF_TEXT(4, trace, "hw_tx");
1327 privptr = (struct claw_privbk *)(dev->ml_priv);
1328 p_env =privptr->p_env;
1329 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1330 /* scan the write queue to free any completed write packets */
1331 p_first_ccw=NULL;
1332 p_last_ccw=NULL;
1333 if ((p_env->packing >= PACK_SEND) &&
1334 (skb->cb[1] != 'P')) {
1335 skb_push(skb,sizeof(struct clawph));
1336 pk_head=(struct clawph *)skb->data;
1337 pk_head->len=skb->len-sizeof(struct clawph);
1338 if (pk_head->len%4) {
1339 pk_head->len+= 4-(pk_head->len%4);
1340 skb_pad(skb,4-(pk_head->len%4));
1341 skb_put(skb,4-(pk_head->len%4));
1342 }
1343 if (p_env->packing == DO_PACKED)
1344 pk_head->link_num = linkid;
1345 else
1346 pk_head->link_num = 0;
1347 pk_head->flag = 0x00;
1348 skb_pad(skb,4);
1349 skb->cb[1] = 'P';
1350 }
1351 if (linkid == 0) {
1352 if (claw_check_busy(dev)) {
1353 if (privptr->write_free_count!=0) {
1354 claw_clear_busy(dev);
1355 }
1356 else {
1357 claw_strt_out_IO(dev );
1358 claw_free_wrt_buf( dev );
1359 if (privptr->write_free_count==0) {
1360 ch = &privptr->channel[WRITE_CHANNEL];
1361 atomic_inc(&skb->users);
1362 skb_queue_tail(&ch->collect_queue, skb);
1363 goto Done;
1364 }
1365 else {
1366 claw_clear_busy(dev);
1367 }
1368 }
1369 }
1370 /* tx lock */
1371 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1372 ch = &privptr->channel[WRITE_CHANNEL];
1373 atomic_inc(&skb->users);
1374 skb_queue_tail(&ch->collect_queue, skb);
1375 claw_strt_out_IO(dev );
1376 rc=-EBUSY;
1377 goto Done2;
1378 }
1379 }
1380 /* See how many write buffers are required to hold this data */
1381 numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1382
1383 /* If that number of buffers isn't available, give up for now */
1384 if (privptr->write_free_count < numBuffers ||
1385 privptr->p_write_free_chain == NULL ) {
1386
1387 claw_setbit_busy(TB_NOBUFFER,dev);
1388 ch = &privptr->channel[WRITE_CHANNEL];
1389 atomic_inc(&skb->users);
1390 skb_queue_tail(&ch->collect_queue, skb);
1391 CLAW_DBF_TEXT(2, trace, "clawbusy");
1392 goto Done2;
1393 }
1394 pDataAddress=skb->data;
1395 len_of_data=skb->len;
1396
1397 while (len_of_data > 0) {
1398 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1399 if (p_this_ccw == NULL) { /* lost the race */
1400 ch = &privptr->channel[WRITE_CHANNEL];
1401 atomic_inc(&skb->users);
1402 skb_queue_tail(&ch->collect_queue, skb);
1403 goto Done2;
1404 }
1405 privptr->p_write_free_chain=p_this_ccw->next;
1406 p_this_ccw->next=NULL;
1407 --privptr->write_free_count; /* -1 */
1408 if (len_of_data >= privptr->p_env->write_size)
1409 bytesInThisBuffer = privptr->p_env->write_size;
1410 else
1411 bytesInThisBuffer = len_of_data;
1412 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1413 len_of_data-=bytesInThisBuffer;
1414 pDataAddress+=(unsigned long)bytesInThisBuffer;
1415 /* setup write CCW */
1416 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1417 if (len_of_data>0) {
1418 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1419 }
1420 p_this_ccw->write.count=bytesInThisBuffer;
1421 /* now add to end of this chain */
1422 if (p_first_ccw==NULL) {
1423 p_first_ccw=p_this_ccw;
1424 }
1425 if (p_last_ccw!=NULL) {
1426 p_last_ccw->next=p_this_ccw;
1427 /* set up TIC ccws */
1428 p_last_ccw->w_TIC_1.cda=
1429 (__u32)__pa(&p_this_ccw->write);
1430 }
1431 p_last_ccw=p_this_ccw; /* save new last block */
1432 }
1433
1434 /* FirstCCW and LastCCW now contain a new set of write channel
1435 * programs to append to the running channel program
1436 */
1437
1438 if (p_first_ccw!=NULL) {
1439 /* setup ending ccw sequence for this segment */
1440 pEnd=privptr->p_end_ccw;
1441 if (pEnd->write1) {
1442 pEnd->write1=0x00; /* second end ccw is now active */
1443 /* set up Tic CCWs */
1444 p_last_ccw->w_TIC_1.cda=
1445 (__u32)__pa(&pEnd->write2_nop1);
1446 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1447 pEnd->write2_nop2.flags =
1448 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1449 pEnd->write2_nop2.cda=0;
1450 pEnd->write2_nop2.count=1;
1451 }
1452 else { /* end of if (pEnd->write1)*/
1453 pEnd->write1=0x01; /* first end ccw is now active */
1454 /* set up Tic CCWs */
1455 p_last_ccw->w_TIC_1.cda=
1456 (__u32)__pa(&pEnd->write1_nop1);
1457 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1458 pEnd->write1_nop2.flags =
1459 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1460 pEnd->write1_nop2.cda=0;
1461 pEnd->write1_nop2.count=1;
1462 } /* end if if (pEnd->write1) */
1463
1464 if (privptr->p_write_active_first==NULL ) {
1465 privptr->p_write_active_first=p_first_ccw;
1466 privptr->p_write_active_last=p_last_ccw;
1467 }
1468 else {
1469 /* set up Tic CCWs */
1470
1471 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1472 tempCCW.count=0;
1473 tempCCW.flags=0;
1474 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1475
1476 if (pEnd->write1) {
1477
1478 /*
1479 * first set of ending CCW's is chained to the new write
1480 * chain, so the second set is chained to the active chain
1481 * Therefore modify the second set to point the new write chain.
1482 * make sure we update the CCW atomically
1483 * so channel does not fetch it when it's only half done
1484 */
1485 memcpy( &pEnd->write2_nop2, &tempCCW ,
1486 sizeof(struct ccw1));
1487 privptr->p_write_active_last->w_TIC_1.cda=
1488 (__u32)__pa(&p_first_ccw->write);
1489 }
1490 else {
1491
1492 /*make sure we update the CCW atomically
1493 *so channel does not fetch it when it's only half done
1494 */
1495 memcpy(&pEnd->write1_nop2, &tempCCW ,
1496 sizeof(struct ccw1));
1497 privptr->p_write_active_last->w_TIC_1.cda=
1498 (__u32)__pa(&p_first_ccw->write);
1499
1500 } /* end if if (pEnd->write1) */
1501
1502 privptr->p_write_active_last->next=p_first_ccw;
1503 privptr->p_write_active_last=p_last_ccw;
1504 }
1505
1506 } /* endif (p_first_ccw!=NULL) */
1507 dev_kfree_skb_any(skb);
1508 claw_strt_out_IO(dev );
1509 /* if write free count is zero , set NOBUFFER */
1510 if (privptr->write_free_count==0) {
1511 claw_setbit_busy(TB_NOBUFFER,dev);
1512 }
1513Done2:
1514 claw_clearbit_busy(TB_TX,dev);
1515Done:
1516 return(rc);
1517} /* end of claw_hw_tx */
1518
1519/*-------------------------------------------------------------------*
1520* *
1521* init_ccw_bk *
1522* *
1523*--------------------------------------------------------------------*/
1524
1525static int
1526init_ccw_bk(struct net_device *dev)
1527{
1528
1529 __u32 ccw_blocks_required;
1530 __u32 ccw_blocks_perpage;
1531 __u32 ccw_pages_required;
1532 __u32 claw_reads_perpage=1;
1533 __u32 claw_read_pages;
1534 __u32 claw_writes_perpage=1;
1535 __u32 claw_write_pages;
1536 void *p_buff=NULL;
1537 struct ccwbk*p_free_chain;
1538 struct ccwbk*p_buf;
1539 struct ccwbk*p_last_CCWB;
1540 struct ccwbk*p_first_CCWB;
1541 struct endccw *p_endccw=NULL;
1542 addr_t real_address;
1543 struct claw_privbk *privptr = dev->ml_priv;
1544 struct clawh *pClawH=NULL;
1545 addr_t real_TIC_address;
1546 int i,j;
1547 CLAW_DBF_TEXT(4, trace, "init_ccw");
1548
1549 /* initialize statistics field */
1550 privptr->active_link_ID=0;
1551 /* initialize ccwbk pointers */
1552 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
1553 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1554 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
1555 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
1556 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
1557 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
1558 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
1559 privptr->buffs_alloc = 0;
1560 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1561 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1562 /* initialize free write ccwbk counter */
1563 privptr->write_free_count=0; /* number of free bufs on write chain */
1564 p_last_CCWB = NULL;
1565 p_first_CCWB= NULL;
1566 /*
1567 * We need 1 CCW block for each read buffer, 1 for each
1568 * write buffer, plus 1 for ClawSignalBlock
1569 */
1570 ccw_blocks_required =
1571 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1572 /*
1573 * compute number of CCW blocks that will fit in a page
1574 */
1575 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
1576 ccw_pages_required=
1577 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1578
1579 /*
1580 * read and write sizes are set by 2 constants in claw.h
1581 * 4k and 32k. Unpacked values other than 4k are not going to
1582 * provide good performance. With packing buffers support 32k
1583 * buffers are used.
1584 */
1585 if (privptr->p_env->read_size < PAGE_SIZE) {
1586 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1587 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1588 claw_reads_perpage);
1589 }
1590 else { /* > or equal */
1591 privptr->p_buff_pages_perread =
1592 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1593 claw_read_pages = privptr->p_env->read_buffers *
1594 privptr->p_buff_pages_perread;
1595 }
1596 if (privptr->p_env->write_size < PAGE_SIZE) {
1597 claw_writes_perpage =
1598 PAGE_SIZE / privptr->p_env->write_size;
1599 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1600 claw_writes_perpage);
1601
1602 }
1603 else { /* > or equal */
1604 privptr->p_buff_pages_perwrite =
1605 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1606 claw_write_pages = privptr->p_env->write_buffers *
1607 privptr->p_buff_pages_perwrite;
1608 }
1609 /*
1610 * allocate ccw_pages_required
1611 */
1612 if (privptr->p_buff_ccw==NULL) {
1613 privptr->p_buff_ccw=
1614 (void *)__get_free_pages(__GFP_DMA,
1615 (int)pages_to_order_of_mag(ccw_pages_required ));
1616 if (privptr->p_buff_ccw==NULL) {
1617 return -ENOMEM;
1618 }
1619 privptr->p_buff_ccw_num=ccw_pages_required;
1620 }
1621 memset(privptr->p_buff_ccw, 0x00,
1622 privptr->p_buff_ccw_num * PAGE_SIZE);
1623
1624 /*
1625 * obtain ending ccw block address
1626 *
1627 */
1628 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1629 real_address = (__u32)__pa(privptr->p_end_ccw);
1630 /* Initialize ending CCW block */
1631 p_endccw=privptr->p_end_ccw;
1632 p_endccw->real=real_address;
1633 p_endccw->write1=0x00;
1634 p_endccw->read1=0x00;
1635
1636 /* write1_nop1 */
1637 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1638 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1639 p_endccw->write1_nop1.count = 1;
1640 p_endccw->write1_nop1.cda = 0;
1641
1642 /* write1_nop2 */
1643 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1644 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1645 p_endccw->write1_nop2.count = 1;
1646 p_endccw->write1_nop2.cda = 0;
1647
1648 /* write2_nop1 */
1649 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1650 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1651 p_endccw->write2_nop1.count = 1;
1652 p_endccw->write2_nop1.cda = 0;
1653
1654 /* write2_nop2 */
1655 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1656 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1657 p_endccw->write2_nop2.count = 1;
1658 p_endccw->write2_nop2.cda = 0;
1659
1660 /* read1_nop1 */
1661 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1662 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1663 p_endccw->read1_nop1.count = 1;
1664 p_endccw->read1_nop1.cda = 0;
1665
1666 /* read1_nop2 */
1667 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1668 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1669 p_endccw->read1_nop2.count = 1;
1670 p_endccw->read1_nop2.cda = 0;
1671
1672 /* read2_nop1 */
1673 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1674 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1675 p_endccw->read2_nop1.count = 1;
1676 p_endccw->read2_nop1.cda = 0;
1677
1678 /* read2_nop2 */
1679 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1680 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1681 p_endccw->read2_nop2.count = 1;
1682 p_endccw->read2_nop2.cda = 0;
1683
1684 /*
1685 * Build a chain of CCWs
1686 *
1687 */
1688 p_buff=privptr->p_buff_ccw;
1689
1690 p_free_chain=NULL;
1691 for (i=0 ; i < ccw_pages_required; i++ ) {
1692 real_address = (__u32)__pa(p_buff);
1693 p_buf=p_buff;
1694 for (j=0 ; j < ccw_blocks_perpage ; j++) {
1695 p_buf->next = p_free_chain;
1696 p_free_chain = p_buf;
1697 p_buf->real=(__u32)__pa(p_buf);
1698 ++p_buf;
1699 }
1700 p_buff+=PAGE_SIZE;
1701 }
1702 /*
1703 * Initialize ClawSignalBlock
1704 *
1705 */
1706 if (privptr->p_claw_signal_blk==NULL) {
1707 privptr->p_claw_signal_blk=p_free_chain;
1708 p_free_chain=p_free_chain->next;
1709 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1710 pClawH->length=0xffff;
1711 pClawH->opcode=0xff;
1712 pClawH->flag=CLAW_BUSY;
1713 }
1714
1715 /*
1716 * allocate write_pages_required and add to free chain
1717 */
1718 if (privptr->p_buff_write==NULL) {
1719 if (privptr->p_env->write_size < PAGE_SIZE) {
1720 privptr->p_buff_write=
1721 (void *)__get_free_pages(__GFP_DMA,
1722 (int)pages_to_order_of_mag(claw_write_pages ));
1723 if (privptr->p_buff_write==NULL) {
1724 privptr->p_buff_ccw=NULL;
1725 return -ENOMEM;
1726 }
1727 /*
1728 * Build CLAW write free chain
1729 *
1730 */
1731
1732 memset(privptr->p_buff_write, 0x00,
1733 ccw_pages_required * PAGE_SIZE);
1734 privptr->p_write_free_chain=NULL;
1735
1736 p_buff=privptr->p_buff_write;
1737
1738 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1739 p_buf = p_free_chain; /* get a CCW */
1740 p_free_chain = p_buf->next;
1741 p_buf->next =privptr->p_write_free_chain;
1742 privptr->p_write_free_chain = p_buf;
1743 p_buf-> p_buffer = (struct clawbuf *)p_buff;
1744 p_buf-> write.cda = (__u32)__pa(p_buff);
1745 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1746 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1747 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1748 p_buf-> w_read_FF.count = 1;
1749 p_buf-> w_read_FF.cda =
1750 (__u32)__pa(&p_buf-> header.flag);
1751 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1752 p_buf-> w_TIC_1.flags = 0;
1753 p_buf-> w_TIC_1.count = 0;
1754
1755 if (((unsigned long)p_buff +
1756 privptr->p_env->write_size) >=
1757 ((unsigned long)(p_buff+2*
1758 (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1759 p_buff = p_buff+privptr->p_env->write_size;
1760 }
1761 }
1762 }
1763 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1764 {
1765 privptr->p_write_free_chain=NULL;
1766 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1767 p_buff=(void *)__get_free_pages(__GFP_DMA,
1768 (int)pages_to_order_of_mag(
1769 privptr->p_buff_pages_perwrite) );
1770 if (p_buff==NULL) {
1771 free_pages((unsigned long)privptr->p_buff_ccw,
1772 (int)pages_to_order_of_mag(
1773 privptr->p_buff_ccw_num));
1774 privptr->p_buff_ccw=NULL;
1775 p_buf=privptr->p_buff_write;
1776 while (p_buf!=NULL) {
1777 free_pages((unsigned long)
1778 p_buf->p_buffer,
1779 (int)pages_to_order_of_mag(
1780 privptr->p_buff_pages_perwrite));
1781 p_buf=p_buf->next;
1782 }
1783 return -ENOMEM;
1784 } /* Error on get_pages */
1785 memset(p_buff, 0x00, privptr->p_env->write_size );
1786 p_buf = p_free_chain;
1787 p_free_chain = p_buf->next;
1788 p_buf->next = privptr->p_write_free_chain;
1789 privptr->p_write_free_chain = p_buf;
1790 privptr->p_buff_write = p_buf;
1791 p_buf->p_buffer=(struct clawbuf *)p_buff;
1792 p_buf-> write.cda = (__u32)__pa(p_buff);
1793 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1794 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1795 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1796 p_buf-> w_read_FF.count = 1;
1797 p_buf-> w_read_FF.cda =
1798 (__u32)__pa(&p_buf-> header.flag);
1799 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1800 p_buf-> w_TIC_1.flags = 0;
1801 p_buf-> w_TIC_1.count = 0;
1802 } /* for all write_buffers */
1803
1804 } /* else buffers are PAGE_SIZE or bigger */
1805
1806 }
1807 privptr->p_buff_write_num=claw_write_pages;
1808 privptr->write_free_count=privptr->p_env->write_buffers;
1809
1810
1811 /*
1812 * allocate read_pages_required and chain to free chain
1813 */
1814 if (privptr->p_buff_read==NULL) {
1815 if (privptr->p_env->read_size < PAGE_SIZE) {
1816 privptr->p_buff_read=
1817 (void *)__get_free_pages(__GFP_DMA,
1818 (int)pages_to_order_of_mag(claw_read_pages) );
1819 if (privptr->p_buff_read==NULL) {
1820 free_pages((unsigned long)privptr->p_buff_ccw,
1821 (int)pages_to_order_of_mag(
1822 privptr->p_buff_ccw_num));
1823 /* free the write pages size is < page size */
1824 free_pages((unsigned long)privptr->p_buff_write,
1825 (int)pages_to_order_of_mag(
1826 privptr->p_buff_write_num));
1827 privptr->p_buff_ccw=NULL;
1828 privptr->p_buff_write=NULL;
1829 return -ENOMEM;
1830 }
1831 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1832 privptr->p_buff_read_num=claw_read_pages;
1833 /*
1834 * Build CLAW read free chain
1835 *
1836 */
1837 p_buff=privptr->p_buff_read;
1838 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1839 p_buf = p_free_chain;
1840 p_free_chain = p_buf->next;
1841
1842 if (p_last_CCWB==NULL) {
1843 p_buf->next=NULL;
1844 real_TIC_address=0;
1845 p_last_CCWB=p_buf;
1846 }
1847 else {
1848 p_buf->next=p_first_CCWB;
1849 real_TIC_address=
1850 (__u32)__pa(&p_first_CCWB -> read );
1851 }
1852
1853 p_first_CCWB=p_buf;
1854
1855 p_buf->p_buffer=(struct clawbuf *)p_buff;
1856 /* initialize read command */
1857 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1858 p_buf-> read.cda = (__u32)__pa(p_buff);
1859 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1860 p_buf-> read.count = privptr->p_env->read_size;
1861
1862 /* initialize read_h command */
1863 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1864 p_buf-> read_h.cda =
1865 (__u32)__pa(&(p_buf->header));
1866 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1867 p_buf-> read_h.count = sizeof(struct clawh);
1868
1869 /* initialize Signal command */
1870 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1871 p_buf-> signal.cda =
1872 (__u32)__pa(&(pClawH->flag));
1873 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1874 p_buf-> signal.count = 1;
1875
1876 /* initialize r_TIC_1 command */
1877 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1878 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1879 p_buf-> r_TIC_1.flags = 0;
1880 p_buf-> r_TIC_1.count = 0;
1881
1882 /* initialize r_read_FF command */
1883 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1884 p_buf-> r_read_FF.cda =
1885 (__u32)__pa(&(pClawH->flag));
1886 p_buf-> r_read_FF.flags =
1887 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1888 p_buf-> r_read_FF.count = 1;
1889
1890 /* initialize r_TIC_2 */
1891 memcpy(&p_buf->r_TIC_2,
1892 &p_buf->r_TIC_1, sizeof(struct ccw1));
1893
1894 /* initialize Header */
1895 p_buf->header.length=0xffff;
1896 p_buf->header.opcode=0xff;
1897 p_buf->header.flag=CLAW_PENDING;
1898
1899 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1900 ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1901 -1)
1902 & PAGE_MASK)) {
1903 p_buff= p_buff+privptr->p_env->read_size;
1904 }
1905 else {
1906 p_buff=
1907 (void *)((unsigned long)
1908 (p_buff+2*(privptr->p_env->read_size)-1)
1909 & PAGE_MASK) ;
1910 }
1911 } /* for read_buffers */
1912 } /* read_size < PAGE_SIZE */
1913 else { /* read Size >= PAGE_SIZE */
1914 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1915 p_buff = (void *)__get_free_pages(__GFP_DMA,
1916 (int)pages_to_order_of_mag(
1917 privptr->p_buff_pages_perread));
1918 if (p_buff==NULL) {
1919 free_pages((unsigned long)privptr->p_buff_ccw,
1920 (int)pages_to_order_of_mag(privptr->
1921 p_buff_ccw_num));
1922 /* free the write pages */
1923 p_buf=privptr->p_buff_write;
1924 while (p_buf!=NULL) {
1925 free_pages(
1926 (unsigned long)p_buf->p_buffer,
1927 (int)pages_to_order_of_mag(
1928 privptr->p_buff_pages_perwrite));
1929 p_buf=p_buf->next;
1930 }
1931 /* free any read pages already alloc */
1932 p_buf=privptr->p_buff_read;
1933 while (p_buf!=NULL) {
1934 free_pages(
1935 (unsigned long)p_buf->p_buffer,
1936 (int)pages_to_order_of_mag(
1937 privptr->p_buff_pages_perread));
1938 p_buf=p_buf->next;
1939 }
1940 privptr->p_buff_ccw=NULL;
1941 privptr->p_buff_write=NULL;
1942 return -ENOMEM;
1943 }
1944 memset(p_buff, 0x00, privptr->p_env->read_size);
1945 p_buf = p_free_chain;
1946 privptr->p_buff_read = p_buf;
1947 p_free_chain = p_buf->next;
1948
1949 if (p_last_CCWB==NULL) {
1950 p_buf->next=NULL;
1951 real_TIC_address=0;
1952 p_last_CCWB=p_buf;
1953 }
1954 else {
1955 p_buf->next=p_first_CCWB;
1956 real_TIC_address=
1957 (addr_t)__pa(
1958 &p_first_CCWB -> read );
1959 }
1960
1961 p_first_CCWB=p_buf;
1962 /* save buff address */
1963 p_buf->p_buffer=(struct clawbuf *)p_buff;
1964 /* initialize read command */
1965 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1966 p_buf-> read.cda = (__u32)__pa(p_buff);
1967 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1968 p_buf-> read.count = privptr->p_env->read_size;
1969
1970 /* initialize read_h command */
1971 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1972 p_buf-> read_h.cda =
1973 (__u32)__pa(&(p_buf->header));
1974 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1975 p_buf-> read_h.count = sizeof(struct clawh);
1976
1977 /* initialize Signal command */
1978 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1979 p_buf-> signal.cda =
1980 (__u32)__pa(&(pClawH->flag));
1981 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1982 p_buf-> signal.count = 1;
1983
1984 /* initialize r_TIC_1 command */
1985 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1986 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1987 p_buf-> r_TIC_1.flags = 0;
1988 p_buf-> r_TIC_1.count = 0;
1989
1990 /* initialize r_read_FF command */
1991 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1992 p_buf-> r_read_FF.cda =
1993 (__u32)__pa(&(pClawH->flag));
1994 p_buf-> r_read_FF.flags =
1995 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1996 p_buf-> r_read_FF.count = 1;
1997
1998 /* initialize r_TIC_2 */
1999 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
2000 sizeof(struct ccw1));
2001
2002 /* initialize Header */
2003 p_buf->header.length=0xffff;
2004 p_buf->header.opcode=0xff;
2005 p_buf->header.flag=CLAW_PENDING;
2006
2007 } /* For read_buffers */
2008 } /* read_size >= PAGE_SIZE */
2009 } /* pBuffread = NULL */
2010 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
2011 privptr->buffs_alloc = 1;
2012
2013 return 0;
2014} /* end of init_ccw_bk */
2015
2016/*-------------------------------------------------------------------*
2017* *
2018* probe_error *
2019* *
2020*--------------------------------------------------------------------*/
2021
2022static void
2023probe_error( struct ccwgroup_device *cgdev)
2024{
2025 struct claw_privbk *privptr;
2026
2027 CLAW_DBF_TEXT(4, trace, "proberr");
2028 privptr = dev_get_drvdata(&cgdev->dev);
2029 if (privptr != NULL) {
2030 dev_set_drvdata(&cgdev->dev, NULL);
2031 kfree(privptr->p_env);
2032 kfree(privptr->p_mtc_envelope);
2033 kfree(privptr);
2034 }
2035} /* probe_error */
2036
2037/*-------------------------------------------------------------------*
2038* claw_process_control *
2039* *
2040* *
2041*--------------------------------------------------------------------*/
2042
2043static int
2044claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2045{
2046
2047 struct clawbuf *p_buf;
2048 struct clawctl ctlbk;
2049 struct clawctl *p_ctlbk;
2050 char temp_host_name[8];
2051 char temp_ws_name[8];
2052 struct claw_privbk *privptr;
2053 struct claw_env *p_env;
2054 struct sysval *p_sysval;
2055 struct conncmd *p_connect=NULL;
2056 int rc;
2057 struct chbk *p_ch = NULL;
2058 struct device *tdev;
2059 CLAW_DBF_TEXT(2, setup, "clw_cntl");
2060 udelay(1000); /* Wait a ms for the control packets to
2061 *catch up to each other */
2062 privptr = dev->ml_priv;
2063 p_env=privptr->p_env;
2064 tdev = &privptr->channel[READ_CHANNEL].cdev->dev;
2065 memcpy( &temp_host_name, p_env->host_name, 8);
2066 memcpy( &temp_ws_name, p_env->adapter_name , 8);
2067 dev_info(tdev, "%s: CLAW device %.8s: "
2068 "Received Control Packet\n",
2069 dev->name, temp_ws_name);
2070 if (privptr->release_pend==1) {
2071 return 0;
2072 }
2073 p_buf=p_ccw->p_buffer;
2074 p_ctlbk=&ctlbk;
2075 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2076 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2077 } else {
2078 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2079 }
2080 switch (p_ctlbk->command)
2081 {
2082 case SYSTEM_VALIDATE_REQUEST:
2083 if (p_ctlbk->version != CLAW_VERSION_ID) {
2084 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2085 CLAW_RC_WRONG_VERSION);
2086 dev_warn(tdev, "The communication peer of %s"
2087 " uses an incorrect API version %d\n",
2088 dev->name, p_ctlbk->version);
2089 }
2090 p_sysval = (struct sysval *)&(p_ctlbk->data);
2091 dev_info(tdev, "%s: Recv Sys Validate Request: "
2092 "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2093 "Host name=%.8s\n",
2094 dev->name, p_ctlbk->version,
2095 p_ctlbk->linkid,
2096 p_ctlbk->correlator,
2097 p_sysval->WS_name,
2098 p_sysval->host_name);
2099 if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2100 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2101 CLAW_RC_NAME_MISMATCH);
2102 CLAW_DBF_TEXT(2, setup, "HSTBAD");
2103 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2104 CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
2105 dev_warn(tdev,
2106 "Host name %s for %s does not match the"
2107 " remote adapter name %s\n",
2108 p_sysval->host_name,
2109 dev->name,
2110 temp_host_name);
2111 }
2112 if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2113 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2114 CLAW_RC_NAME_MISMATCH);
2115 CLAW_DBF_TEXT(2, setup, "WSNBAD");
2116 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2117 CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
2118 dev_warn(tdev, "Adapter name %s for %s does not match"
2119 " the remote host name %s\n",
2120 p_sysval->WS_name,
2121 dev->name,
2122 temp_ws_name);
2123 }
2124 if ((p_sysval->write_frame_size < p_env->write_size) &&
2125 (p_env->packing == 0)) {
2126 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2127 CLAW_RC_HOST_RCV_TOO_SMALL);
2128 dev_warn(tdev,
2129 "The local write buffer is smaller than the"
2130 " remote read buffer\n");
2131 CLAW_DBF_TEXT(2, setup, "wrtszbad");
2132 }
2133 if ((p_sysval->read_frame_size < p_env->read_size) &&
2134 (p_env->packing == 0)) {
2135 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2136 CLAW_RC_HOST_RCV_TOO_SMALL);
2137 dev_warn(tdev,
2138 "The local read buffer is smaller than the"
2139 " remote write buffer\n");
2140 CLAW_DBF_TEXT(2, setup, "rdsizbad");
2141 }
2142 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
2143 dev_info(tdev,
2144 "CLAW device %.8s: System validate"
2145 " completed.\n", temp_ws_name);
2146 dev_info(tdev,
2147 "%s: sys Validate Rsize:%d Wsize:%d\n",
2148 dev->name, p_sysval->read_frame_size,
2149 p_sysval->write_frame_size);
2150 privptr->system_validate_comp = 1;
2151 if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2152 p_env->packing = PACKING_ASK;
2153 claw_strt_conn_req(dev);
2154 break;
2155 case SYSTEM_VALIDATE_RESPONSE:
2156 p_sysval = (struct sysval *)&(p_ctlbk->data);
2157 dev_info(tdev,
2158 "Settings for %s validated (version=%d, "
2159 "remote device=%d, rc=%d, adapter name=%.8s, "
2160 "host name=%.8s)\n",
2161 dev->name,
2162 p_ctlbk->version,
2163 p_ctlbk->correlator,
2164 p_ctlbk->rc,
2165 p_sysval->WS_name,
2166 p_sysval->host_name);
2167 switch (p_ctlbk->rc) {
2168 case 0:
2169 dev_info(tdev, "%s: CLAW device "
2170 "%.8s: System validate completed.\n",
2171 dev->name, temp_ws_name);
2172 if (privptr->system_validate_comp == 0)
2173 claw_strt_conn_req(dev);
2174 privptr->system_validate_comp = 1;
2175 break;
2176 case CLAW_RC_NAME_MISMATCH:
2177 dev_warn(tdev, "Validating %s failed because of"
2178 " a host or adapter name mismatch\n",
2179 dev->name);
2180 break;
2181 case CLAW_RC_WRONG_VERSION:
2182 dev_warn(tdev, "Validating %s failed because of a"
2183 " version conflict\n",
2184 dev->name);
2185 break;
2186 case CLAW_RC_HOST_RCV_TOO_SMALL:
2187 dev_warn(tdev, "Validating %s failed because of a"
2188 " frame size conflict\n",
2189 dev->name);
2190 break;
2191 default:
2192 dev_warn(tdev, "The communication peer of %s rejected"
2193 " the connection\n",
2194 dev->name);
2195 break;
2196 }
2197 break;
2198
2199 case CONNECTION_REQUEST:
2200 p_connect = (struct conncmd *)&(p_ctlbk->data);
2201 dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2202 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2203 dev->name,
2204 p_ctlbk->version,
2205 p_ctlbk->linkid,
2206 p_ctlbk->correlator,
2207 p_connect->host_name,
2208 p_connect->WS_name);
2209 if (privptr->active_link_ID != 0) {
2210 claw_snd_disc(dev, p_ctlbk);
2211 dev_info(tdev, "%s rejected a connection request"
2212 " because it is already active\n",
2213 dev->name);
2214 }
2215 if (p_ctlbk->linkid != 1) {
2216 claw_snd_disc(dev, p_ctlbk);
2217 dev_info(tdev, "%s rejected a request to open multiple"
2218 " connections\n",
2219 dev->name);
2220 }
2221 rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2222 if (rc != 0) {
2223 claw_snd_disc(dev, p_ctlbk);
2224 dev_info(tdev, "%s rejected a connection request"
2225 " because of a type mismatch\n",
2226 dev->name);
2227 }
2228 claw_send_control(dev,
2229 CONNECTION_CONFIRM, p_ctlbk->linkid,
2230 p_ctlbk->correlator,
2231 0, p_connect->host_name,
2232 p_connect->WS_name);
2233 if (p_env->packing == PACKING_ASK) {
2234 p_env->packing = PACK_SEND;
2235 claw_snd_conn_req(dev, 0);
2236 }
2237 dev_info(tdev, "%s: CLAW device %.8s: Connection "
2238 "completed link_id=%d.\n",
2239 dev->name, temp_ws_name,
2240 p_ctlbk->linkid);
2241 privptr->active_link_ID = p_ctlbk->linkid;
2242 p_ch = &privptr->channel[WRITE_CHANNEL];
2243 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2244 break;
2245 case CONNECTION_RESPONSE:
2246 p_connect = (struct conncmd *)&(p_ctlbk->data);
2247 dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
2248 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2249 dev->name,
2250 p_ctlbk->version,
2251 p_ctlbk->linkid,
2252 p_ctlbk->correlator,
2253 p_ctlbk->rc,
2254 p_connect->host_name,
2255 p_connect->WS_name);
2256
2257 if (p_ctlbk->rc != 0) {
2258 dev_warn(tdev, "The communication peer of %s rejected"
2259 " a connection request\n",
2260 dev->name);
2261 return 1;
2262 }
2263 rc = find_link(dev,
2264 p_connect->host_name, p_connect->WS_name);
2265 if (rc != 0) {
2266 claw_snd_disc(dev, p_ctlbk);
2267 dev_warn(tdev, "The communication peer of %s"
2268 " rejected a connection "
2269 "request because of a type mismatch\n",
2270 dev->name);
2271 }
2272 /* should be until CONNECTION_CONFIRM */
2273 privptr->active_link_ID = -(p_ctlbk->linkid);
2274 break;
2275 case CONNECTION_CONFIRM:
2276 p_connect = (struct conncmd *)&(p_ctlbk->data);
2277 dev_info(tdev,
2278 "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
2279 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
2280 dev->name,
2281 p_ctlbk->version,
2282 p_ctlbk->linkid,
2283 p_ctlbk->correlator,
2284 p_connect->host_name,
2285 p_connect->WS_name);
2286 if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2287 privptr->active_link_ID = p_ctlbk->linkid;
2288 if (p_env->packing > PACKING_ASK) {
2289 dev_info(tdev,
2290 "%s: Confirmed Now packing\n", dev->name);
2291 p_env->packing = DO_PACKED;
2292 }
2293 p_ch = &privptr->channel[WRITE_CHANNEL];
2294 wake_up(&p_ch->wait);
2295 } else {
2296 dev_warn(tdev, "Activating %s failed because of"
2297 " an incorrect link ID=%d\n",
2298 dev->name, p_ctlbk->linkid);
2299 claw_snd_disc(dev, p_ctlbk);
2300 }
2301 break;
2302 case DISCONNECT:
2303 dev_info(tdev, "%s: Disconnect: "
2304 "Vers=%d,link_id=%d,Corr=%d\n",
2305 dev->name, p_ctlbk->version,
2306 p_ctlbk->linkid, p_ctlbk->correlator);
2307 if ((p_ctlbk->linkid == 2) &&
2308 (p_env->packing == PACK_SEND)) {
2309 privptr->active_link_ID = 1;
2310 p_env->packing = DO_PACKED;
2311 } else
2312 privptr->active_link_ID = 0;
2313 break;
2314 case CLAW_ERROR:
2315 dev_warn(tdev, "The communication peer of %s failed\n",
2316 dev->name);
2317 break;
2318 default:
2319 dev_warn(tdev, "The communication peer of %s sent"
2320 " an unknown command code\n",
2321 dev->name);
2322 break;
2323 }
2324
2325 return 0;
2326} /* end of claw_process_control */
2327
2328
2329/*-------------------------------------------------------------------*
2330* claw_send_control *
2331* *
2332*--------------------------------------------------------------------*/
2333
2334static int
2335claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2336 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2337{
2338 struct claw_privbk *privptr;
2339 struct clawctl *p_ctl;
2340 struct sysval *p_sysval;
2341 struct conncmd *p_connect;
2342 struct sk_buff *skb;
2343
2344 CLAW_DBF_TEXT(2, setup, "sndcntl");
2345 privptr = dev->ml_priv;
2346 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2347
2348 p_ctl->command=type;
2349 p_ctl->version=CLAW_VERSION_ID;
2350 p_ctl->linkid=link;
2351 p_ctl->correlator=correlator;
2352 p_ctl->rc=rc;
2353
2354 p_sysval=(struct sysval *)&p_ctl->data;
2355 p_connect=(struct conncmd *)&p_ctl->data;
2356
2357 switch (p_ctl->command) {
2358 case SYSTEM_VALIDATE_REQUEST:
2359 case SYSTEM_VALIDATE_RESPONSE:
2360 memcpy(&p_sysval->host_name, local_name, 8);
2361 memcpy(&p_sysval->WS_name, remote_name, 8);
2362 if (privptr->p_env->packing > 0) {
2363 p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2364 p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
2365 } else {
2366 /* how big is the biggest group of packets */
2367 p_sysval->read_frame_size =
2368 privptr->p_env->read_size;
2369 p_sysval->write_frame_size =
2370 privptr->p_env->write_size;
2371 }
2372 memset(&p_sysval->reserved, 0x00, 4);
2373 break;
2374 case CONNECTION_REQUEST:
2375 case CONNECTION_RESPONSE:
2376 case CONNECTION_CONFIRM:
2377 case DISCONNECT:
2378 memcpy(&p_sysval->host_name, local_name, 8);
2379 memcpy(&p_sysval->WS_name, remote_name, 8);
2380 if (privptr->p_env->packing > 0) {
2381 /* How big is the biggest packet */
2382 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2383 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2384 } else {
2385 memset(&p_connect->reserved1, 0x00, 4);
2386 memset(&p_connect->reserved2, 0x00, 4);
2387 }
2388 break;
2389 default:
2390 break;
2391 }
2392
2393 /* write Control Record to the device */
2394
2395
2396 skb = dev_alloc_skb(sizeof(struct clawctl));
2397 if (!skb) {
2398 return -ENOMEM;
2399 }
2400 memcpy(skb_put(skb, sizeof(struct clawctl)),
2401 p_ctl, sizeof(struct clawctl));
2402 if (privptr->p_env->packing >= PACK_SEND)
2403 claw_hw_tx(skb, dev, 1);
2404 else
2405 claw_hw_tx(skb, dev, 0);
2406 return 0;
2407} /* end of claw_send_control */
2408
2409/*-------------------------------------------------------------------*
2410* claw_snd_conn_req *
2411* *
2412*--------------------------------------------------------------------*/
2413static int
2414claw_snd_conn_req(struct net_device *dev, __u8 link)
2415{
2416 int rc;
2417 struct claw_privbk *privptr = dev->ml_priv;
2418 struct clawctl *p_ctl;
2419
2420 CLAW_DBF_TEXT(2, setup, "snd_conn");
2421 rc = 1;
2422 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2423 p_ctl->linkid = link;
2424 if ( privptr->system_validate_comp==0x00 ) {
2425 return rc;
2426 }
2427 if (privptr->p_env->packing == PACKING_ASK )
2428 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2429 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2430 if (privptr->p_env->packing == PACK_SEND) {
2431 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2432 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2433 }
2434 if (privptr->p_env->packing == 0)
2435 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2436 HOST_APPL_NAME, privptr->p_env->api_type);
2437 return rc;
2438
2439} /* end of claw_snd_conn_req */
2440
2441
2442/*-------------------------------------------------------------------*
2443* claw_snd_disc *
2444* *
2445*--------------------------------------------------------------------*/
2446
2447static int
2448claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2449{
2450 int rc;
2451 struct conncmd * p_connect;
2452
2453 CLAW_DBF_TEXT(2, setup, "snd_dsc");
2454 p_connect=(struct conncmd *)&p_ctl->data;
2455
2456 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2457 p_ctl->correlator, 0,
2458 p_connect->host_name, p_connect->WS_name);
2459 return rc;
2460} /* end of claw_snd_disc */
2461
2462
2463/*-------------------------------------------------------------------*
2464* claw_snd_sys_validate_rsp *
2465* *
2466*--------------------------------------------------------------------*/
2467
2468static int
2469claw_snd_sys_validate_rsp(struct net_device *dev,
2470 struct clawctl *p_ctl, __u32 return_code)
2471{
2472 struct claw_env * p_env;
2473 struct claw_privbk *privptr;
2474 int rc;
2475
2476 CLAW_DBF_TEXT(2, setup, "chkresp");
2477 privptr = dev->ml_priv;
2478 p_env=privptr->p_env;
2479 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2480 p_ctl->linkid,
2481 p_ctl->correlator,
2482 return_code,
2483 p_env->host_name,
2484 p_env->adapter_name );
2485 return rc;
2486} /* end of claw_snd_sys_validate_rsp */
2487
2488/*-------------------------------------------------------------------*
2489* claw_strt_conn_req *
2490* *
2491*--------------------------------------------------------------------*/
2492
2493static int
2494claw_strt_conn_req(struct net_device *dev )
2495{
2496 int rc;
2497
2498 CLAW_DBF_TEXT(2, setup, "conn_req");
2499 rc=claw_snd_conn_req(dev, 1);
2500 return rc;
2501} /* end of claw_strt_conn_req */
2502
2503
2504
2505/*-------------------------------------------------------------------*
2506 * claw_stats *
2507 *-------------------------------------------------------------------*/
2508
2509static struct
2510net_device_stats *claw_stats(struct net_device *dev)
2511{
2512 struct claw_privbk *privptr;
2513
2514 CLAW_DBF_TEXT(4, trace, "stats");
2515 privptr = dev->ml_priv;
2516 return &privptr->stats;
2517} /* end of claw_stats */
2518
2519
2520/*-------------------------------------------------------------------*
2521* unpack_read *
2522* *
2523*--------------------------------------------------------------------*/
2524static void
2525unpack_read(struct net_device *dev )
2526{
2527 struct sk_buff *skb;
2528 struct claw_privbk *privptr;
2529 struct claw_env *p_env;
2530 struct ccwbk *p_this_ccw;
2531 struct ccwbk *p_first_ccw;
2532 struct ccwbk *p_last_ccw;
2533 struct clawph *p_packh;
2534 void *p_packd;
2535 struct clawctl *p_ctlrec=NULL;
2536 struct device *p_dev;
2537
2538 __u32 len_of_data;
2539 __u32 pack_off;
2540 __u8 link_num;
2541 __u8 mtc_this_frm=0;
2542 __u32 bytes_to_mov;
2543 int i=0;
2544 int p=0;
2545
2546 CLAW_DBF_TEXT(4, trace, "unpkread");
2547 p_first_ccw=NULL;
2548 p_last_ccw=NULL;
2549 p_packh=NULL;
2550 p_packd=NULL;
2551 privptr = dev->ml_priv;
2552
2553 p_dev = &privptr->channel[READ_CHANNEL].cdev->dev;
2554 p_env = privptr->p_env;
2555 p_this_ccw=privptr->p_read_active_first;
2556 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
2557 pack_off = 0;
2558 p = 0;
2559 p_this_ccw->header.flag=CLAW_PENDING;
2560 privptr->p_read_active_first=p_this_ccw->next;
2561 p_this_ccw->next=NULL;
2562 p_packh = (struct clawph *)p_this_ccw->p_buffer;
2563 if ((p_env->packing == PACK_SEND) &&
2564 (p_packh->len == 32) &&
2565 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
2566 p_packh++; /* peek past pack header */
2567 p_ctlrec = (struct clawctl *)p_packh;
2568 p_packh--; /* un peek */
2569 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2570 (p_ctlrec->command == CONNECTION_CONFIRM))
2571 p_env->packing = DO_PACKED;
2572 }
2573 if (p_env->packing == DO_PACKED)
2574 link_num=p_packh->link_num;
2575 else
2576 link_num=p_this_ccw->header.opcode / 8;
2577 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
2578 mtc_this_frm=1;
2579 if (p_this_ccw->header.length!=
2580 privptr->p_env->read_size ) {
2581 dev_warn(p_dev,
2582 "The communication peer of %s"
2583 " sent a faulty"
2584 " frame of length %02x\n",
2585 dev->name, p_this_ccw->header.length);
2586 }
2587 }
2588
2589 if (privptr->mtc_skipping) {
2590 /*
2591 * We're in the mode of skipping past a
2592 * multi-frame message
2593 * that we can't process for some reason or other.
2594 * The first frame without the More-To-Come flag is
2595 * the last frame of the skipped message.
2596 */
2597 /* in case of More-To-Come not set in this frame */
2598 if (mtc_this_frm==0) {
2599 privptr->mtc_skipping=0; /* Ok, the end */
2600 privptr->mtc_logical_link=-1;
2601 }
2602 goto NextFrame;
2603 }
2604
2605 if (link_num==0) {
2606 claw_process_control(dev, p_this_ccw);
2607 CLAW_DBF_TEXT(4, trace, "UnpkCntl");
2608 goto NextFrame;
2609 }
2610unpack_next:
2611 if (p_env->packing == DO_PACKED) {
2612 if (pack_off > p_env->read_size)
2613 goto NextFrame;
2614 p_packd = p_this_ccw->p_buffer+pack_off;
2615 p_packh = (struct clawph *) p_packd;
2616 if ((p_packh->len == 0) || /* done with this frame? */
2617 (p_packh->flag != 0))
2618 goto NextFrame;
2619 bytes_to_mov = p_packh->len;
2620 pack_off += bytes_to_mov+sizeof(struct clawph);
2621 p++;
2622 } else {
2623 bytes_to_mov=p_this_ccw->header.length;
2624 }
2625 if (privptr->mtc_logical_link<0) {
2626
2627 /*
2628 * if More-To-Come is set in this frame then we don't know
2629 * length of entire message, and hence have to allocate
2630 * large buffer */
2631
2632 /* We are starting a new envelope */
2633 privptr->mtc_offset=0;
2634 privptr->mtc_logical_link=link_num;
2635 }
2636
2637 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2638 /* error */
2639 privptr->stats.rx_frame_errors++;
2640 goto NextFrame;
2641 }
2642 if (p_env->packing == DO_PACKED) {
2643 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2644 p_packd+sizeof(struct clawph), bytes_to_mov);
2645
2646 } else {
2647 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2648 p_this_ccw->p_buffer, bytes_to_mov);
2649 }
2650 if (mtc_this_frm==0) {
2651 len_of_data=privptr->mtc_offset+bytes_to_mov;
2652 skb=dev_alloc_skb(len_of_data);
2653 if (skb) {
2654 memcpy(skb_put(skb,len_of_data),
2655 privptr->p_mtc_envelope,
2656 len_of_data);
2657 skb->dev=dev;
2658 skb_reset_mac_header(skb);
2659 skb->protocol=htons(ETH_P_IP);
2660 skb->ip_summed=CHECKSUM_UNNECESSARY;
2661 privptr->stats.rx_packets++;
2662 privptr->stats.rx_bytes+=len_of_data;
2663 netif_rx(skb);
2664 }
2665 else {
2666 dev_info(p_dev, "Allocating a buffer for"
2667 " incoming data failed\n");
2668 privptr->stats.rx_dropped++;
2669 }
2670 privptr->mtc_offset=0;
2671 privptr->mtc_logical_link=-1;
2672 }
2673 else {
2674 privptr->mtc_offset+=bytes_to_mov;
2675 }
2676 if (p_env->packing == DO_PACKED)
2677 goto unpack_next;
2678NextFrame:
2679 /*
2680 * Remove ThisCCWblock from active read queue, and add it
2681 * to queue of free blocks to be reused.
2682 */
2683 i++;
2684 p_this_ccw->header.length=0xffff;
2685 p_this_ccw->header.opcode=0xff;
2686 /*
2687 * add this one to the free queue for later reuse
2688 */
2689 if (p_first_ccw==NULL) {
2690 p_first_ccw = p_this_ccw;
2691 }
2692 else {
2693 p_last_ccw->next = p_this_ccw;
2694 }
2695 p_last_ccw = p_this_ccw;
2696 /*
2697 * chain to next block on active read queue
2698 */
2699 p_this_ccw = privptr->p_read_active_first;
2700 CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
2701 } /* end of while */
2702
2703 /* check validity */
2704
2705 CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
2706 add_claw_reads(dev, p_first_ccw, p_last_ccw);
2707 claw_strt_read(dev, LOCK_YES);
2708 return;
2709} /* end of unpack_read */
2710
2711/*-------------------------------------------------------------------*
2712* claw_strt_read *
2713* *
2714*--------------------------------------------------------------------*/
2715static void
2716claw_strt_read (struct net_device *dev, int lock )
2717{
2718 int rc = 0;
2719 __u32 parm;
2720 unsigned long saveflags = 0;
2721 struct claw_privbk *privptr = dev->ml_priv;
2722 struct ccwbk*p_ccwbk;
2723 struct chbk *p_ch;
2724 struct clawh *p_clawh;
2725 p_ch = &privptr->channel[READ_CHANNEL];
2726
2727 CLAW_DBF_TEXT(4, trace, "StRdNter");
2728 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2729 p_clawh->flag=CLAW_IDLE; /* 0x00 */
2730
2731 if ((privptr->p_write_active_first!=NULL &&
2732 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2733 (privptr->p_read_active_first!=NULL &&
2734 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2735 p_clawh->flag=CLAW_BUSY; /* 0xff */
2736 }
2737 if (lock==LOCK_YES) {
2738 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2739 }
2740 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2741 CLAW_DBF_TEXT(4, trace, "HotRead");
2742 p_ccwbk=privptr->p_read_active_first;
2743 parm = (unsigned long) p_ch;
2744 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2745 0xff, 0);
2746 if (rc != 0) {
2747 ccw_check_return_code(p_ch->cdev, rc);
2748 }
2749 }
2750 else {
2751 CLAW_DBF_TEXT(2, trace, "ReadAct");
2752 }
2753
2754 if (lock==LOCK_YES) {
2755 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2756 }
2757 CLAW_DBF_TEXT(4, trace, "StRdExit");
2758 return;
2759} /* end of claw_strt_read */
2760
2761/*-------------------------------------------------------------------*
2762* claw_strt_out_IO *
2763* *
2764*--------------------------------------------------------------------*/
2765
2766static void
2767claw_strt_out_IO( struct net_device *dev )
2768{
2769 int rc = 0;
2770 unsigned long parm;
2771 struct claw_privbk *privptr;
2772 struct chbk *p_ch;
2773 struct ccwbk *p_first_ccw;
2774
2775 if (!dev) {
2776 return;
2777 }
2778 privptr = (struct claw_privbk *)dev->ml_priv;
2779 p_ch = &privptr->channel[WRITE_CHANNEL];
2780
2781 CLAW_DBF_TEXT(4, trace, "strt_io");
2782 p_first_ccw=privptr->p_write_active_first;
2783
2784 if (p_ch->claw_state == CLAW_STOP)
2785 return;
2786 if (p_first_ccw == NULL) {
2787 return;
2788 }
2789 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2790 parm = (unsigned long) p_ch;
2791 CLAW_DBF_TEXT(2, trace, "StWrtIO");
2792 rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2793 0xff, 0);
2794 if (rc != 0) {
2795 ccw_check_return_code(p_ch->cdev, rc);
2796 }
2797 }
2798 dev->trans_start = jiffies;
2799 return;
2800} /* end of claw_strt_out_IO */
2801
2802/*-------------------------------------------------------------------*
2803* Free write buffers *
2804* *
2805*--------------------------------------------------------------------*/
2806
2807static void
2808claw_free_wrt_buf( struct net_device *dev )
2809{
2810
2811 struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
2812 struct ccwbk*p_this_ccw;
2813 struct ccwbk*p_next_ccw;
2814
2815 CLAW_DBF_TEXT(4, trace, "freewrtb");
2816 /* scan the write queue to free any completed write packets */
2817 p_this_ccw=privptr->p_write_active_first;
2818 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2819 {
2820 p_next_ccw = p_this_ccw->next;
2821 if (((p_next_ccw!=NULL) &&
2822 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2823 ((p_this_ccw == privptr->p_write_active_last) &&
2824 (p_this_ccw->header.flag!=CLAW_PENDING))) {
2825 /* The next CCW is OK or this is */
2826 /* the last CCW...free it @A1A */
2827 privptr->p_write_active_first=p_this_ccw->next;
2828 p_this_ccw->header.flag=CLAW_PENDING;
2829 p_this_ccw->next=privptr->p_write_free_chain;
2830 privptr->p_write_free_chain=p_this_ccw;
2831 ++privptr->write_free_count;
2832 privptr->stats.tx_bytes+= p_this_ccw->write.count;
2833 p_this_ccw=privptr->p_write_active_first;
2834 privptr->stats.tx_packets++;
2835 }
2836 else {
2837 break;
2838 }
2839 }
2840 if (privptr->write_free_count!=0) {
2841 claw_clearbit_busy(TB_NOBUFFER,dev);
2842 }
2843 /* whole chain removed? */
2844 if (privptr->p_write_active_first==NULL) {
2845 privptr->p_write_active_last=NULL;
2846 }
2847 CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
2848 return;
2849}
2850
2851/*-------------------------------------------------------------------*
2852* claw free netdevice *
2853* *
2854*--------------------------------------------------------------------*/
2855static void
2856claw_free_netdevice(struct net_device * dev, int free_dev)
2857{
2858 struct claw_privbk *privptr;
2859
2860 CLAW_DBF_TEXT(2, setup, "free_dev");
2861 if (!dev)
2862 return;
2863 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2864 privptr = dev->ml_priv;
2865 if (dev->flags & IFF_RUNNING)
2866 claw_release(dev);
2867 if (privptr) {
2868 privptr->channel[READ_CHANNEL].ndev = NULL; /* say it's free */
2869 }
2870 dev->ml_priv = NULL;
2871#ifdef MODULE
2872 if (free_dev) {
2873 free_netdev(dev);
2874 }
2875#endif
2876 CLAW_DBF_TEXT(2, setup, "free_ok");
2877}
2878
2879/**
2880 * Claw init netdevice
2881 * Initialize everything of the net device except the name and the
2882 * channel structs.
2883 */
2884static const struct net_device_ops claw_netdev_ops = {
2885 .ndo_open = claw_open,
2886 .ndo_stop = claw_release,
2887 .ndo_get_stats = claw_stats,
2888 .ndo_start_xmit = claw_tx,
2889 .ndo_change_mtu = claw_change_mtu,
2890};
2891
2892static void
2893claw_init_netdevice(struct net_device * dev)
2894{
2895 CLAW_DBF_TEXT(2, setup, "init_dev");
2896 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2897 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
2898 dev->hard_header_len = 0;
2899 dev->addr_len = 0;
2900 dev->type = ARPHRD_SLIP;
2901 dev->tx_queue_len = 1300;
2902 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2903 dev->netdev_ops = &claw_netdev_ops;
2904 CLAW_DBF_TEXT(2, setup, "initok");
2905 return;
2906}
2907
2908/**
2909 * Init a new channel in the privptr->channel[i].
2910 *
2911 * @param cdev The ccw_device to be added.
2912 *
2913 * @return 0 on success, !0 on error.
2914 */
2915static int
2916add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2917{
2918 struct chbk *p_ch;
2919 struct ccw_dev_id dev_id;
2920
2921 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
2922 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
2923 p_ch = &privptr->channel[i];
2924 p_ch->cdev = cdev;
2925 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
2926 ccw_device_get_id(cdev, &dev_id);
2927 p_ch->devno = dev_id.devno;
2928 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
2929 return -ENOMEM;
2930 }
2931 return 0;
2932}
2933
2934
2935/**
2936 *
2937 * Setup an interface.
2938 *
2939 * @param cgdev Device to be setup.
2940 *
2941 * @returns 0 on success, !0 on failure.
2942 */
2943static int
2944claw_new_device(struct ccwgroup_device *cgdev)
2945{
2946 struct claw_privbk *privptr;
2947 struct claw_env *p_env;
2948 struct net_device *dev;
2949 int ret;
2950 struct ccw_dev_id dev_id;
2951
2952 dev_info(&cgdev->dev, "add for %s\n",
2953 dev_name(&cgdev->cdev[READ_CHANNEL]->dev));
2954 CLAW_DBF_TEXT(2, setup, "new_dev");
2955 privptr = dev_get_drvdata(&cgdev->dev);
2956 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2957 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2958 if (!privptr)
2959 return -ENODEV;
2960 p_env = privptr->p_env;
2961 ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id);
2962 p_env->devno[READ_CHANNEL] = dev_id.devno;
2963 ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id);
2964 p_env->devno[WRITE_CHANNEL] = dev_id.devno;
2965 ret = add_channel(cgdev->cdev[0],0,privptr);
2966 if (ret == 0)
2967 ret = add_channel(cgdev->cdev[1],1,privptr);
2968 if (ret != 0) {
2969 dev_warn(&cgdev->dev, "Creating a CLAW group device"
2970 " failed with error code %d\n", ret);
2971 goto out;
2972 }
2973 ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]);
2974 if (ret != 0) {
2975 dev_warn(&cgdev->dev,
2976 "Setting the read subchannel online"
2977 " failed with error code %d\n", ret);
2978 goto out;
2979 }
2980 ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]);
2981 if (ret != 0) {
2982 dev_warn(&cgdev->dev,
2983 "Setting the write subchannel online "
2984 "failed with error code %d\n", ret);
2985 goto out;
2986 }
2987 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
2988 if (!dev) {
2989 dev_warn(&cgdev->dev,
2990 "Activating the CLAW device failed\n");
2991 goto out;
2992 }
2993 dev->ml_priv = privptr;
2994 dev_set_drvdata(&cgdev->dev, privptr);
2995 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2996 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2997 /* sysfs magic */
2998 SET_NETDEV_DEV(dev, &cgdev->dev);
2999 if (register_netdev(dev) != 0) {
3000 claw_free_netdevice(dev, 1);
3001 CLAW_DBF_TEXT(2, trace, "regfail");
3002 goto out;
3003 }
3004 dev->flags &=~IFF_RUNNING;
3005 if (privptr->buffs_alloc == 0) {
3006 ret=init_ccw_bk(dev);
3007 if (ret !=0) {
3008 unregister_netdev(dev);
3009 claw_free_netdevice(dev,1);
3010 CLAW_DBF_TEXT(2, trace, "ccwmem");
3011 goto out;
3012 }
3013 }
3014 privptr->channel[READ_CHANNEL].ndev = dev;
3015 privptr->channel[WRITE_CHANNEL].ndev = dev;
3016 privptr->p_env->ndev = dev;
3017
3018 dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d "
3019 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
3020 dev->name, p_env->read_size,
3021 p_env->write_size, p_env->read_buffers,
3022 p_env->write_buffers, p_env->devno[READ_CHANNEL],
3023 p_env->devno[WRITE_CHANNEL]);
3024 dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
3025 ":%.8s api_type: %.8s\n",
3026 dev->name, p_env->host_name,
3027 p_env->adapter_name , p_env->api_type);
3028 return 0;
3029out:
3030 ccw_device_set_offline(cgdev->cdev[1]);
3031 ccw_device_set_offline(cgdev->cdev[0]);
3032 return -ENODEV;
3033}
3034
3035static void
3036claw_purge_skb_queue(struct sk_buff_head *q)
3037{
3038 struct sk_buff *skb;
3039
3040 CLAW_DBF_TEXT(4, trace, "purgque");
3041 while ((skb = skb_dequeue(q))) {
3042 atomic_dec(&skb->users);
3043 dev_kfree_skb_any(skb);
3044 }
3045}
3046
3047/**
3048 * Shutdown an interface.
3049 *
3050 * @param cgdev Device to be shut down.
3051 *
3052 * @returns 0 on success, !0 on failure.
3053 */
3054static int
3055claw_shutdown_device(struct ccwgroup_device *cgdev)
3056{
3057 struct claw_privbk *priv;
3058 struct net_device *ndev;
3059 int ret = 0;
3060
3061 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3062 priv = dev_get_drvdata(&cgdev->dev);
3063 if (!priv)
3064 return -ENODEV;
3065 ndev = priv->channel[READ_CHANNEL].ndev;
3066 if (ndev) {
3067 /* Close the device */
3068 dev_info(&cgdev->dev, "%s: shutting down\n",
3069 ndev->name);
3070 if (ndev->flags & IFF_RUNNING)
3071 ret = claw_release(ndev);
3072 ndev->flags &=~IFF_RUNNING;
3073 unregister_netdev(ndev);
3074 ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
3075 claw_free_netdevice(ndev, 1);
3076 priv->channel[READ_CHANNEL].ndev = NULL;
3077 priv->channel[WRITE_CHANNEL].ndev = NULL;
3078 priv->p_env->ndev = NULL;
3079 }
3080 ccw_device_set_offline(cgdev->cdev[1]);
3081 ccw_device_set_offline(cgdev->cdev[0]);
3082 return ret;
3083}
3084
3085static void
3086claw_remove_device(struct ccwgroup_device *cgdev)
3087{
3088 struct claw_privbk *priv;
3089
3090 BUG_ON(!cgdev);
3091 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3092 priv = dev_get_drvdata(&cgdev->dev);
3093 BUG_ON(!priv);
3094 dev_info(&cgdev->dev, " will be removed.\n");
3095 if (cgdev->state == CCWGROUP_ONLINE)
3096 claw_shutdown_device(cgdev);
3097 claw_remove_files(&cgdev->dev);
3098 kfree(priv->p_mtc_envelope);
3099 priv->p_mtc_envelope=NULL;
3100 kfree(priv->p_env);
3101 priv->p_env=NULL;
3102 kfree(priv->channel[0].irb);
3103 priv->channel[0].irb=NULL;
3104 kfree(priv->channel[1].irb);
3105 priv->channel[1].irb=NULL;
3106 kfree(priv);
3107 dev_set_drvdata(&cgdev->dev, NULL);
3108 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL);
3109 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL);
3110 put_device(&cgdev->dev);
3111
3112 return;
3113}
3114
3115
3116/*
3117 * sysfs attributes
3118 */
3119static ssize_t
3120claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
3121{
3122 struct claw_privbk *priv;
3123 struct claw_env * p_env;
3124
3125 priv = dev_get_drvdata(dev);
3126 if (!priv)
3127 return -ENODEV;
3128 p_env = priv->p_env;
3129 return sprintf(buf, "%s\n",p_env->host_name);
3130}
3131
3132static ssize_t
3133claw_hname_write(struct device *dev, struct device_attribute *attr,
3134 const char *buf, size_t count)
3135{
3136 struct claw_privbk *priv;
3137 struct claw_env * p_env;
3138
3139 priv = dev_get_drvdata(dev);
3140 if (!priv)
3141 return -ENODEV;
3142 p_env = priv->p_env;
3143 if (count > MAX_NAME_LEN+1)
3144 return -EINVAL;
3145 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3146 strncpy(p_env->host_name,buf, count);
3147 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
3148 p_env->host_name[MAX_NAME_LEN] = 0x00;
3149 CLAW_DBF_TEXT(2, setup, "HstnSet");
3150 CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
3151
3152 return count;
3153}
3154
3155static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3156
3157static ssize_t
3158claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
3159{
3160 struct claw_privbk *priv;
3161 struct claw_env * p_env;
3162
3163 priv = dev_get_drvdata(dev);
3164 if (!priv)
3165 return -ENODEV;
3166 p_env = priv->p_env;
3167 return sprintf(buf, "%s\n", p_env->adapter_name);
3168}
3169
3170static ssize_t
3171claw_adname_write(struct device *dev, struct device_attribute *attr,
3172 const char *buf, size_t count)
3173{
3174 struct claw_privbk *priv;
3175 struct claw_env * p_env;
3176
3177 priv = dev_get_drvdata(dev);
3178 if (!priv)
3179 return -ENODEV;
3180 p_env = priv->p_env;
3181 if (count > MAX_NAME_LEN+1)
3182 return -EINVAL;
3183 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3184 strncpy(p_env->adapter_name,buf, count);
3185 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3186 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
3187 CLAW_DBF_TEXT(2, setup, "AdnSet");
3188 CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
3189
3190 return count;
3191}
3192
3193static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3194
3195static ssize_t
3196claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
3197{
3198 struct claw_privbk *priv;
3199 struct claw_env * p_env;
3200
3201 priv = dev_get_drvdata(dev);
3202 if (!priv)
3203 return -ENODEV;
3204 p_env = priv->p_env;
3205 return sprintf(buf, "%s\n",
3206 p_env->api_type);
3207}
3208
3209static ssize_t
3210claw_apname_write(struct device *dev, struct device_attribute *attr,
3211 const char *buf, size_t count)
3212{
3213 struct claw_privbk *priv;
3214 struct claw_env * p_env;
3215
3216 priv = dev_get_drvdata(dev);
3217 if (!priv)
3218 return -ENODEV;
3219 p_env = priv->p_env;
3220 if (count > MAX_NAME_LEN+1)
3221 return -EINVAL;
3222 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3223 strncpy(p_env->api_type,buf, count);
3224 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
3225 p_env->api_type[MAX_NAME_LEN] = 0x00;
3226 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3227 p_env->read_size=DEF_PACK_BUFSIZE;
3228 p_env->write_size=DEF_PACK_BUFSIZE;
3229 p_env->packing=PACKING_ASK;
3230 CLAW_DBF_TEXT(2, setup, "PACKING");
3231 }
3232 else {
3233 p_env->packing=0;
3234 p_env->read_size=CLAW_FRAME_SIZE;
3235 p_env->write_size=CLAW_FRAME_SIZE;
3236 CLAW_DBF_TEXT(2, setup, "ApiSet");
3237 }
3238 CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
3239 return count;
3240}
3241
3242static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3243
3244static ssize_t
3245claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3246{
3247 struct claw_privbk *priv;
3248 struct claw_env * p_env;
3249
3250 priv = dev_get_drvdata(dev);
3251 if (!priv)
3252 return -ENODEV;
3253 p_env = priv->p_env;
3254 return sprintf(buf, "%d\n", p_env->write_buffers);
3255}
3256
3257static ssize_t
3258claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3259 const char *buf, size_t count)
3260{
3261 struct claw_privbk *priv;
3262 struct claw_env * p_env;
3263 int nnn,max;
3264
3265 priv = dev_get_drvdata(dev);
3266 if (!priv)
3267 return -ENODEV;
3268 p_env = priv->p_env;
3269 sscanf(buf, "%i", &nnn);
3270 if (p_env->packing) {
3271 max = 64;
3272 }
3273 else {
3274 max = 512;
3275 }
3276 if ((nnn > max ) || (nnn < 2))
3277 return -EINVAL;
3278 p_env->write_buffers = nnn;
3279 CLAW_DBF_TEXT(2, setup, "Wbufset");
3280 CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
3281 return count;
3282}
3283
3284static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3285
3286static ssize_t
3287claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3288{
3289 struct claw_privbk *priv;
3290 struct claw_env * p_env;
3291
3292 priv = dev_get_drvdata(dev);
3293 if (!priv)
3294 return -ENODEV;
3295 p_env = priv->p_env;
3296 return sprintf(buf, "%d\n", p_env->read_buffers);
3297}
3298
3299static ssize_t
3300claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3301 const char *buf, size_t count)
3302{
3303 struct claw_privbk *priv;
3304 struct claw_env *p_env;
3305 int nnn,max;
3306
3307 priv = dev_get_drvdata(dev);
3308 if (!priv)
3309 return -ENODEV;
3310 p_env = priv->p_env;
3311 sscanf(buf, "%i", &nnn);
3312 if (p_env->packing) {
3313 max = 64;
3314 }
3315 else {
3316 max = 512;
3317 }
3318 if ((nnn > max ) || (nnn < 2))
3319 return -EINVAL;
3320 p_env->read_buffers = nnn;
3321 CLAW_DBF_TEXT(2, setup, "Rbufset");
3322 CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
3323 return count;
3324}
3325
3326static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3327
3328static struct attribute *claw_attr[] = {
3329 &dev_attr_read_buffer.attr,
3330 &dev_attr_write_buffer.attr,
3331 &dev_attr_adapter_name.attr,
3332 &dev_attr_api_type.attr,
3333 &dev_attr_host_name.attr,
3334 NULL,
3335};
3336
3337static struct attribute_group claw_attr_group = {
3338 .attrs = claw_attr,
3339};
3340
3341static int
3342claw_add_files(struct device *dev)
3343{
3344 CLAW_DBF_TEXT(2, setup, "add_file");
3345 return sysfs_create_group(&dev->kobj, &claw_attr_group);
3346}
3347
3348static void
3349claw_remove_files(struct device *dev)
3350{
3351 CLAW_DBF_TEXT(2, setup, "rem_file");
3352 sysfs_remove_group(&dev->kobj, &claw_attr_group);
3353}
3354
3355/*--------------------------------------------------------------------*
3356* claw_init and cleanup *
3357*---------------------------------------------------------------------*/
3358
3359static void __exit
3360claw_cleanup(void)
3361{
3362 driver_remove_file(&claw_group_driver.driver,
3363 &driver_attr_group);
3364 ccwgroup_driver_unregister(&claw_group_driver);
3365 ccw_driver_unregister(&claw_ccw_driver);
3366 root_device_unregister(claw_root_dev);
3367 claw_unregister_debug_facility();
3368 pr_info("Driver unloaded\n");
3369
3370}
3371
3372/**
3373 * Initialize module.
3374 * This is called just after the module is loaded.
3375 *
3376 * @return 0 on success, !0 on error.
3377 */
3378static int __init
3379claw_init(void)
3380{
3381 int ret = 0;
3382
3383 pr_info("Loading %s\n", version);
3384 ret = claw_register_debug_facility();
3385 if (ret) {
3386 pr_err("Registering with the S/390 debug feature"
3387 " failed with error code %d\n", ret);
3388 goto out_err;
3389 }
3390 CLAW_DBF_TEXT(2, setup, "init_mod");
3391 claw_root_dev = root_device_register("claw");
3392 ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0;
3393 if (ret)
3394 goto register_err;
3395 ret = ccw_driver_register(&claw_ccw_driver);
3396 if (ret)
3397 goto ccw_err;
3398 claw_group_driver.driver.groups = claw_group_attr_groups;
3399 ret = ccwgroup_driver_register(&claw_group_driver);
3400 if (ret)
3401 goto ccwgroup_err;
3402 return 0;
3403
3404ccwgroup_err:
3405 ccw_driver_unregister(&claw_ccw_driver);
3406ccw_err:
3407 root_device_unregister(claw_root_dev);
3408register_err:
3409 CLAW_DBF_TEXT(2, setup, "init_bad");
3410 claw_unregister_debug_facility();
3411out_err:
3412 pr_err("Initializing the claw device driver failed\n");
3413 return ret;
3414}
3415
3416module_init(claw_init);
3417module_exit(claw_cleanup);
3418
3419MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
3420MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
3421 "Copyright 2000,2008 IBM Corporation\n");
3422MODULE_LICENSE("GPL");