tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * ESCON CLAW network driver
3 *
4 * Linux for zSeries version
5 * Copyright IBM Corp. 2002, 2009
6 * Author(s) Original code written by:
7 * Kazuo Iimura <iimura@jp.ibm.com>
8 * Rewritten by
9 * Andy Richter <richtera@us.ibm.com>
10 * Marc Price <mwprice@us.ibm.com>
11 *
12 * sysfs parms:
13 * group x.x.rrrr,x.x.wwww
14 * read_buffer nnnnnnn
15 * write_buffer nnnnnn
16 * host_name aaaaaaaa
17 * adapter_name aaaaaaaa
18 * api_type aaaaaaaa
19 *
20 * eg.
21 * group 0.0.0200 0.0.0201
22 * read_buffer 25
23 * write_buffer 20
24 * host_name LINUX390
25 * adapter_name RS6K
26 * api_type TCPIP
27 *
28 * where
29 *
30 * The device id is decided by the order entries
31 * are added to the group the first is claw0 the second claw1
32 * up to CLAW_MAX_DEV
33 *
34 * rrrr - the first of 2 consecutive device addresses used for the
35 * CLAW protocol.
36 * The specified address is always used as the input (Read)
37 * channel and the next address is used as the output channel.
38 *
39 * wwww - the second of 2 consecutive device addresses used for
40 * the CLAW protocol.
41 * The specified address is always used as the output
42 * channel and the previous address is used as the input channel.
43 *
44 * read_buffer - specifies number of input buffers to allocate.
45 * write_buffer - specifies number of output buffers to allocate.
46 * host_name - host name
47 * adaptor_name - adaptor name
48 * api_type - API type TCPIP or API will be sent and expected
49 * as ws_name
50 *
51 * Note the following requirements:
52 * 1) host_name must match the configured adapter_name on the remote side
53 * 2) adaptor_name must match the configured host name on the remote side
54 *
55 * Change History
56 * 1.00 Initial release shipped
57 * 1.10 Changes for Buffer allocation
58 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
59 * 1.25 Added Packing support
60 * 1.5
61 */
62
63#define KMSG_COMPONENT "claw"
64
65#include <asm/ccwdev.h>
66#include <asm/ccwgroup.h>
67#include <asm/debug.h>
68#include <asm/idals.h>
69#include <asm/io.h>
70#include <linux/bitops.h>
71#include <linux/ctype.h>
72#include <linux/delay.h>
73#include <linux/errno.h>
74#include <linux/if_arp.h>
75#include <linux/init.h>
76#include <linux/interrupt.h>
77#include <linux/ip.h>
78#include <linux/kernel.h>
79#include <linux/module.h>
80#include <linux/netdevice.h>
81#include <linux/etherdevice.h>
82#include <linux/proc_fs.h>
83#include <linux/sched.h>
84#include <linux/signal.h>
85#include <linux/skbuff.h>
86#include <linux/slab.h>
87#include <linux/string.h>
88#include <linux/tcp.h>
89#include <linux/timer.h>
90#include <linux/types.h>
91
92#include "claw.h"
93
94/*
95 CLAW uses the s390dbf file system see claw_trace and claw_setup
96*/
97
98static char version[] __initdata = "CLAW driver";
99static char debug_buffer[255];
100/**
101 * Debug Facility Stuff
102 */
103static debug_info_t *claw_dbf_setup;
104static debug_info_t *claw_dbf_trace;
105
106/**
107 * CLAW Debug Facility functions
108 */
109static void
110claw_unregister_debug_facility(void)
111{
112 if (claw_dbf_setup)
113 debug_unregister(claw_dbf_setup);
114 if (claw_dbf_trace)
115 debug_unregister(claw_dbf_trace);
116}
117
118static int
119claw_register_debug_facility(void)
120{
121 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
122 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
123 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
124 claw_unregister_debug_facility();
125 return -ENOMEM;
126 }
127 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
128 debug_set_level(claw_dbf_setup, 2);
129 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
130 debug_set_level(claw_dbf_trace, 2);
131 return 0;
132}
133
134static inline void
135claw_set_busy(struct net_device *dev)
136{
137 ((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
138}
139
140static inline void
141claw_clear_busy(struct net_device *dev)
142{
143 clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
144 netif_wake_queue(dev);
145}
146
147static inline int
148claw_check_busy(struct net_device *dev)
149{
150 return ((struct claw_privbk *) dev->ml_priv)->tbusy;
151}
152
153static inline void
154claw_setbit_busy(int nr,struct net_device *dev)
155{
156 netif_stop_queue(dev);
157 set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
158}
159
160static inline void
161claw_clearbit_busy(int nr,struct net_device *dev)
162{
163 clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
164 netif_wake_queue(dev);
165}
166
167static inline int
168claw_test_and_setbit_busy(int nr,struct net_device *dev)
169{
170 netif_stop_queue(dev);
171 return test_and_set_bit(nr,
172 (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy));
173}
174
175
176/* Functions for the DEV methods */
177
178static int claw_probe(struct ccwgroup_device *cgdev);
179static void claw_remove_device(struct ccwgroup_device *cgdev);
180static void claw_purge_skb_queue(struct sk_buff_head *q);
181static int claw_new_device(struct ccwgroup_device *cgdev);
182static int claw_shutdown_device(struct ccwgroup_device *cgdev);
183static int claw_tx(struct sk_buff *skb, struct net_device *dev);
184static int claw_change_mtu( struct net_device *dev, int new_mtu);
185static int claw_open(struct net_device *dev);
186static void claw_irq_handler(struct ccw_device *cdev,
187 unsigned long intparm, struct irb *irb);
188static void claw_irq_tasklet ( unsigned long data );
189static int claw_release(struct net_device *dev);
190static void claw_write_retry ( struct chbk * p_ch );
191static void claw_write_next ( struct chbk * p_ch );
192static void claw_timer ( struct chbk * p_ch );
193
194/* Functions */
195static int add_claw_reads(struct net_device *dev,
196 struct ccwbk* p_first, struct ccwbk* p_last);
197static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
198static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
199static int find_link(struct net_device *dev, char *host_name, char *ws_name );
200static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
201static int init_ccw_bk(struct net_device *dev);
202static void probe_error( struct ccwgroup_device *cgdev);
203static struct net_device_stats *claw_stats(struct net_device *dev);
204static int pages_to_order_of_mag(int num_of_pages);
205static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
206/* sysfs Functions */
207static ssize_t claw_hname_show(struct device *dev,
208 struct device_attribute *attr, char *buf);
209static ssize_t claw_hname_write(struct device *dev,
210 struct device_attribute *attr,
211 const char *buf, size_t count);
212static ssize_t claw_adname_show(struct device *dev,
213 struct device_attribute *attr, char *buf);
214static ssize_t claw_adname_write(struct device *dev,
215 struct device_attribute *attr,
216 const char *buf, size_t count);
217static ssize_t claw_apname_show(struct device *dev,
218 struct device_attribute *attr, char *buf);
219static ssize_t claw_apname_write(struct device *dev,
220 struct device_attribute *attr,
221 const char *buf, size_t count);
222static ssize_t claw_wbuff_show(struct device *dev,
223 struct device_attribute *attr, char *buf);
224static ssize_t claw_wbuff_write(struct device *dev,
225 struct device_attribute *attr,
226 const char *buf, size_t count);
227static ssize_t claw_rbuff_show(struct device *dev,
228 struct device_attribute *attr, char *buf);
229static ssize_t claw_rbuff_write(struct device *dev,
230 struct device_attribute *attr,
231 const char *buf, size_t count);
232
233/* Functions for System Validate */
234static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
235static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
236 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
237static int claw_snd_conn_req(struct net_device *dev, __u8 link);
238static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
239static int claw_snd_sys_validate_rsp(struct net_device *dev,
240 struct clawctl * p_ctl, __u32 return_code);
241static int claw_strt_conn_req(struct net_device *dev );
242static void claw_strt_read(struct net_device *dev, int lock);
243static void claw_strt_out_IO(struct net_device *dev);
244static void claw_free_wrt_buf(struct net_device *dev);
245
246/* Functions for unpack reads */
247static void unpack_read(struct net_device *dev);
248
249static int claw_pm_prepare(struct ccwgroup_device *gdev)
250{
251 return -EPERM;
252}
253
254/* the root device for claw group devices */
255static struct device *claw_root_dev;
256
257/* ccwgroup table */
258
259static struct ccwgroup_driver claw_group_driver = {
260 .driver = {
261 .owner = THIS_MODULE,
262 .name = "claw",
263 },
264 .setup = claw_probe,
265 .remove = claw_remove_device,
266 .set_online = claw_new_device,
267 .set_offline = claw_shutdown_device,
268 .prepare = claw_pm_prepare,
269};
270
271static struct ccw_device_id claw_ids[] = {
272 {CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw},
273 {},
274};
275MODULE_DEVICE_TABLE(ccw, claw_ids);
276
277static struct ccw_driver claw_ccw_driver = {
278 .driver = {
279 .owner = THIS_MODULE,
280 .name = "claw",
281 },
282 .ids = claw_ids,
283 .probe = ccwgroup_probe_ccwdev,
284 .remove = ccwgroup_remove_ccwdev,
285 .int_class = IRQIO_CLW,
286};
287
288static ssize_t claw_driver_group_store(struct device_driver *ddrv,
289 const char *buf, size_t count)
290{
291 int err;
292 err = ccwgroup_create_dev(claw_root_dev, &claw_group_driver, 2, buf);
293 return err ? err : count;
294}
295static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
296
297static struct attribute *claw_drv_attrs[] = {
298 &driver_attr_group.attr,
299 NULL,
300};
301static struct attribute_group claw_drv_attr_group = {
302 .attrs = claw_drv_attrs,
303};
304static const struct attribute_group *claw_drv_attr_groups[] = {
305 &claw_drv_attr_group,
306 NULL,
307};
308
309/*
310* Key functions
311*/
312
313/*-------------------------------------------------------------------*
314 * claw_tx *
315 *-------------------------------------------------------------------*/
316
317static int
318claw_tx(struct sk_buff *skb, struct net_device *dev)
319{
320 int rc;
321 struct claw_privbk *privptr = dev->ml_priv;
322 unsigned long saveflags;
323 struct chbk *p_ch;
324
325 CLAW_DBF_TEXT(4, trace, "claw_tx");
326 p_ch = &privptr->channel[WRITE_CHANNEL];
327 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
328 rc=claw_hw_tx( skb, dev, 1 );
329 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
330 CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
331 if (rc)
332 rc = NETDEV_TX_BUSY;
333 else
334 rc = NETDEV_TX_OK;
335 return rc;
336} /* end of claw_tx */
337
338/*------------------------------------------------------------------*
339 * pack the collect queue into an skb and return it *
340 * If not packing just return the top skb from the queue *
341 *------------------------------------------------------------------*/
342
343static struct sk_buff *
344claw_pack_skb(struct claw_privbk *privptr)
345{
346 struct sk_buff *new_skb,*held_skb;
347 struct chbk *p_ch = &privptr->channel[WRITE_CHANNEL];
348 struct claw_env *p_env = privptr->p_env;
349 int pkt_cnt,pk_ind,so_far;
350
351 new_skb = NULL; /* assume no dice */
352 pkt_cnt = 0;
353 CLAW_DBF_TEXT(4, trace, "PackSKBe");
354 if (!skb_queue_empty(&p_ch->collect_queue)) {
355 /* some data */
356 held_skb = skb_dequeue(&p_ch->collect_queue);
357 if (held_skb)
358 dev_kfree_skb_any(held_skb);
359 else
360 return NULL;
361 if (p_env->packing != DO_PACKED)
362 return held_skb;
363 /* get a new SKB we will pack at least one */
364 new_skb = dev_alloc_skb(p_env->write_size);
365 if (new_skb == NULL) {
366 atomic_inc(&held_skb->users);
367 skb_queue_head(&p_ch->collect_queue,held_skb);
368 return NULL;
369 }
370 /* we have packed packet and a place to put it */
371 pk_ind = 1;
372 so_far = 0;
373 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
374 while ((pk_ind) && (held_skb != NULL)) {
375 if (held_skb->len+so_far <= p_env->write_size-8) {
376 memcpy(skb_put(new_skb,held_skb->len),
377 held_skb->data,held_skb->len);
378 privptr->stats.tx_packets++;
379 so_far += held_skb->len;
380 pkt_cnt++;
381 dev_kfree_skb_any(held_skb);
382 held_skb = skb_dequeue(&p_ch->collect_queue);
383 if (held_skb)
384 atomic_dec(&held_skb->users);
385 } else {
386 pk_ind = 0;
387 atomic_inc(&held_skb->users);
388 skb_queue_head(&p_ch->collect_queue,held_skb);
389 }
390 }
391 }
392 CLAW_DBF_TEXT(4, trace, "PackSKBx");
393 return new_skb;
394}
395
396/*-------------------------------------------------------------------*
397 * claw_change_mtu *
398 * *
399 *-------------------------------------------------------------------*/
400
401static int
402claw_change_mtu(struct net_device *dev, int new_mtu)
403{
404 struct claw_privbk *privptr = dev->ml_priv;
405 int buff_size;
406 CLAW_DBF_TEXT(4, trace, "setmtu");
407 buff_size = privptr->p_env->write_size;
408 if ((new_mtu < 60) || (new_mtu > buff_size)) {
409 return -EINVAL;
410 }
411 dev->mtu = new_mtu;
412 return 0;
413} /* end of claw_change_mtu */
414
415
416/*-------------------------------------------------------------------*
417 * claw_open *
418 * *
419 *-------------------------------------------------------------------*/
420static int
421claw_open(struct net_device *dev)
422{
423
424 int rc;
425 int i;
426 unsigned long saveflags=0;
427 unsigned long parm;
428 struct claw_privbk *privptr;
429 DECLARE_WAITQUEUE(wait, current);
430 struct timer_list timer;
431 struct ccwbk *p_buf;
432
433 CLAW_DBF_TEXT(4, trace, "open");
434 privptr = (struct claw_privbk *)dev->ml_priv;
435 /* allocate and initialize CCW blocks */
436 if (privptr->buffs_alloc == 0) {
437 rc=init_ccw_bk(dev);
438 if (rc) {
439 CLAW_DBF_TEXT(2, trace, "openmem");
440 return -ENOMEM;
441 }
442 }
443 privptr->system_validate_comp=0;
444 privptr->release_pend=0;
445 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
446 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
447 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
448 privptr->p_env->packing=PACKING_ASK;
449 } else {
450 privptr->p_env->packing=0;
451 privptr->p_env->read_size=CLAW_FRAME_SIZE;
452 privptr->p_env->write_size=CLAW_FRAME_SIZE;
453 }
454 claw_set_busy(dev);
455 tasklet_init(&privptr->channel[READ_CHANNEL].tasklet, claw_irq_tasklet,
456 (unsigned long) &privptr->channel[READ_CHANNEL]);
457 for ( i = 0; i < 2; i++) {
458 CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
459 init_waitqueue_head(&privptr->channel[i].wait);
460 /* skb_queue_head_init(&p_ch->io_queue); */
461 if (i == WRITE_CHANNEL)
462 skb_queue_head_init(
463 &privptr->channel[WRITE_CHANNEL].collect_queue);
464 privptr->channel[i].flag_a = 0;
465 privptr->channel[i].IO_active = 0;
466 privptr->channel[i].flag &= ~CLAW_TIMER;
467 init_timer(&timer);
468 timer.function = (void *)claw_timer;
469 timer.data = (unsigned long)(&privptr->channel[i]);
470 timer.expires = jiffies + 15*HZ;
471 add_timer(&timer);
472 spin_lock_irqsave(get_ccwdev_lock(
473 privptr->channel[i].cdev), saveflags);
474 parm = (unsigned long) &privptr->channel[i];
475 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
476 rc = 0;
477 add_wait_queue(&privptr->channel[i].wait, &wait);
478 rc = ccw_device_halt(
479 (struct ccw_device *)privptr->channel[i].cdev,parm);
480 set_current_state(TASK_INTERRUPTIBLE);
481 spin_unlock_irqrestore(
482 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
483 schedule();
484 set_current_state(TASK_RUNNING);
485 remove_wait_queue(&privptr->channel[i].wait, &wait);
486 if(rc != 0)
487 ccw_check_return_code(privptr->channel[i].cdev, rc);
488 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
489 del_timer(&timer);
490 }
491 if ((((privptr->channel[READ_CHANNEL].last_dstat |
492 privptr->channel[WRITE_CHANNEL].last_dstat) &
493 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
494 (((privptr->channel[READ_CHANNEL].flag |
495 privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) {
496 dev_info(&privptr->channel[READ_CHANNEL].cdev->dev,
497 "%s: remote side is not ready\n", dev->name);
498 CLAW_DBF_TEXT(2, trace, "notrdy");
499
500 for ( i = 0; i < 2; i++) {
501 spin_lock_irqsave(
502 get_ccwdev_lock(privptr->channel[i].cdev),
503 saveflags);
504 parm = (unsigned long) &privptr->channel[i];
505 privptr->channel[i].claw_state = CLAW_STOP;
506 rc = ccw_device_halt(
507 (struct ccw_device *)&privptr->channel[i].cdev,
508 parm);
509 spin_unlock_irqrestore(
510 get_ccwdev_lock(privptr->channel[i].cdev),
511 saveflags);
512 if (rc != 0) {
513 ccw_check_return_code(
514 privptr->channel[i].cdev, rc);
515 }
516 }
517 free_pages((unsigned long)privptr->p_buff_ccw,
518 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
519 if (privptr->p_env->read_size < PAGE_SIZE) {
520 free_pages((unsigned long)privptr->p_buff_read,
521 (int)pages_to_order_of_mag(
522 privptr->p_buff_read_num));
523 }
524 else {
525 p_buf=privptr->p_read_active_first;
526 while (p_buf!=NULL) {
527 free_pages((unsigned long)p_buf->p_buffer,
528 (int)pages_to_order_of_mag(
529 privptr->p_buff_pages_perread ));
530 p_buf=p_buf->next;
531 }
532 }
533 if (privptr->p_env->write_size < PAGE_SIZE ) {
534 free_pages((unsigned long)privptr->p_buff_write,
535 (int)pages_to_order_of_mag(
536 privptr->p_buff_write_num));
537 }
538 else {
539 p_buf=privptr->p_write_active_first;
540 while (p_buf!=NULL) {
541 free_pages((unsigned long)p_buf->p_buffer,
542 (int)pages_to_order_of_mag(
543 privptr->p_buff_pages_perwrite ));
544 p_buf=p_buf->next;
545 }
546 }
547 privptr->buffs_alloc = 0;
548 privptr->channel[READ_CHANNEL].flag = 0x00;
549 privptr->channel[WRITE_CHANNEL].flag = 0x00;
550 privptr->p_buff_ccw=NULL;
551 privptr->p_buff_read=NULL;
552 privptr->p_buff_write=NULL;
553 claw_clear_busy(dev);
554 CLAW_DBF_TEXT(2, trace, "open EIO");
555 return -EIO;
556 }
557
558 /* Send SystemValidate command */
559
560 claw_clear_busy(dev);
561 CLAW_DBF_TEXT(4, trace, "openok");
562 return 0;
563} /* end of claw_open */
564
565/*-------------------------------------------------------------------*
566* *
567* claw_irq_handler *
568* *
569*--------------------------------------------------------------------*/
570static void
571claw_irq_handler(struct ccw_device *cdev,
572 unsigned long intparm, struct irb *irb)
573{
574 struct chbk *p_ch = NULL;
575 struct claw_privbk *privptr = NULL;
576 struct net_device *dev = NULL;
577 struct claw_env *p_env;
578 struct chbk *p_ch_r=NULL;
579
580 CLAW_DBF_TEXT(4, trace, "clawirq");
581 /* Bypass all 'unsolicited interrupts' */
582 privptr = dev_get_drvdata(&cdev->dev);
583 if (!privptr) {
584 dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
585 " IRQ, c-%02x d-%02x\n",
586 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
587 CLAW_DBF_TEXT(2, trace, "badirq");
588 return;
589 }
590
591 /* Try to extract channel from driver data. */
592 if (privptr->channel[READ_CHANNEL].cdev == cdev)
593 p_ch = &privptr->channel[READ_CHANNEL];
594 else if (privptr->channel[WRITE_CHANNEL].cdev == cdev)
595 p_ch = &privptr->channel[WRITE_CHANNEL];
596 else {
597 dev_warn(&cdev->dev, "The device is not a CLAW device\n");
598 CLAW_DBF_TEXT(2, trace, "badchan");
599 return;
600 }
601 CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
602
603 dev = (struct net_device *) (p_ch->ndev);
604 p_env=privptr->p_env;
605
606 /* Copy interruption response block. */
607 memcpy(p_ch->irb, irb, sizeof(struct irb));
608
609 /* Check for good subchannel return code, otherwise info message */
610 if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
611 dev_info(&cdev->dev,
612 "%s: subchannel check for device: %04x -"
613 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
614 dev->name, p_ch->devno,
615 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
616 irb->scsw.cmd.cpa);
617 CLAW_DBF_TEXT(2, trace, "chanchk");
618 /* return; */
619 }
620
621 /* Check the reason-code of a unit check */
622 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
623 ccw_check_unit_check(p_ch, irb->ecw[0]);
624
625 /* State machine to bring the connection up, down and to restart */
626 p_ch->last_dstat = irb->scsw.cmd.dstat;
627
628 switch (p_ch->claw_state) {
629 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
630 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
631 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
632 (p_ch->irb->scsw.cmd.stctl ==
633 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
634 return;
635 wake_up(&p_ch->wait); /* wake up claw_release */
636 CLAW_DBF_TEXT(4, trace, "stop");
637 return;
638 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
639 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
640 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
641 (p_ch->irb->scsw.cmd.stctl ==
642 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
643 CLAW_DBF_TEXT(4, trace, "haltio");
644 return;
645 }
646 if (p_ch->flag == CLAW_READ) {
647 p_ch->claw_state = CLAW_START_READ;
648 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
649 } else if (p_ch->flag == CLAW_WRITE) {
650 p_ch->claw_state = CLAW_START_WRITE;
651 /* send SYSTEM_VALIDATE */
652 claw_strt_read(dev, LOCK_NO);
653 claw_send_control(dev,
654 SYSTEM_VALIDATE_REQUEST,
655 0, 0, 0,
656 p_env->host_name,
657 p_env->adapter_name);
658 } else {
659 dev_warn(&cdev->dev, "The CLAW device received"
660 " an unexpected IRQ, "
661 "c-%02x d-%02x\n",
662 irb->scsw.cmd.cstat,
663 irb->scsw.cmd.dstat);
664 return;
665 }
666 CLAW_DBF_TEXT(4, trace, "haltio");
667 return;
668 case CLAW_START_READ:
669 CLAW_DBF_TEXT(4, trace, "ReadIRQ");
670 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
671 clear_bit(0, (void *)&p_ch->IO_active);
672 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
673 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
674 (p_ch->irb->ecw[0]) == 0) {
675 privptr->stats.rx_errors++;
676 dev_info(&cdev->dev,
677 "%s: Restart is required after remote "
678 "side recovers \n",
679 dev->name);
680 }
681 CLAW_DBF_TEXT(4, trace, "notrdy");
682 return;
683 }
684 if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
685 (p_ch->irb->scsw.cmd.dstat == 0)) {
686 if (test_and_set_bit(CLAW_BH_ACTIVE,
687 (void *)&p_ch->flag_a) == 0)
688 tasklet_schedule(&p_ch->tasklet);
689 else
690 CLAW_DBF_TEXT(4, trace, "PCINoBH");
691 CLAW_DBF_TEXT(4, trace, "PCI_read");
692 return;
693 }
694 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
695 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
696 (p_ch->irb->scsw.cmd.stctl ==
697 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
698 CLAW_DBF_TEXT(4, trace, "SPend_rd");
699 return;
700 }
701 clear_bit(0, (void *)&p_ch->IO_active);
702 claw_clearbit_busy(TB_RETRY, dev);
703 if (test_and_set_bit(CLAW_BH_ACTIVE,
704 (void *)&p_ch->flag_a) == 0)
705 tasklet_schedule(&p_ch->tasklet);
706 else
707 CLAW_DBF_TEXT(4, trace, "RdBHAct");
708 CLAW_DBF_TEXT(4, trace, "RdIRQXit");
709 return;
710 case CLAW_START_WRITE:
711 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
712 dev_info(&cdev->dev,
713 "%s: Unit Check Occurred in "
714 "write channel\n", dev->name);
715 clear_bit(0, (void *)&p_ch->IO_active);
716 if (p_ch->irb->ecw[0] & 0x80) {
717 dev_info(&cdev->dev,
718 "%s: Resetting Event "
719 "occurred:\n", dev->name);
720 init_timer(&p_ch->timer);
721 p_ch->timer.function =
722 (void *)claw_write_retry;
723 p_ch->timer.data = (unsigned long)p_ch;
724 p_ch->timer.expires = jiffies + 10*HZ;
725 add_timer(&p_ch->timer);
726 dev_info(&cdev->dev,
727 "%s: write connection "
728 "restarting\n", dev->name);
729 }
730 CLAW_DBF_TEXT(4, trace, "rstrtwrt");
731 return;
732 }
733 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
734 clear_bit(0, (void *)&p_ch->IO_active);
735 dev_info(&cdev->dev,
736 "%s: Unit Exception "
737 "occurred in write channel\n",
738 dev->name);
739 }
740 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
741 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
742 (p_ch->irb->scsw.cmd.stctl ==
743 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
744 CLAW_DBF_TEXT(4, trace, "writeUE");
745 return;
746 }
747 clear_bit(0, (void *)&p_ch->IO_active);
748 if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
749 claw_write_next(p_ch);
750 claw_clearbit_busy(TB_TX, dev);
751 claw_clear_busy(dev);
752 }
753 p_ch_r = (struct chbk *)&privptr->channel[READ_CHANNEL];
754 if (test_and_set_bit(CLAW_BH_ACTIVE,
755 (void *)&p_ch_r->flag_a) == 0)
756 tasklet_schedule(&p_ch_r->tasklet);
757 CLAW_DBF_TEXT(4, trace, "StWtExit");
758 return;
759 default:
760 dev_warn(&cdev->dev,
761 "The CLAW device for %s received an unexpected IRQ\n",
762 dev->name);
763 CLAW_DBF_TEXT(2, trace, "badIRQ");
764 return;
765 }
766
767} /* end of claw_irq_handler */
768
769
770/*-------------------------------------------------------------------*
771* claw_irq_tasklet *
772* *
773*--------------------------------------------------------------------*/
774static void
775claw_irq_tasklet ( unsigned long data )
776{
777 struct chbk * p_ch;
778 struct net_device *dev;
779
780 p_ch = (struct chbk *) data;
781 dev = (struct net_device *)p_ch->ndev;
782 CLAW_DBF_TEXT(4, trace, "IRQtask");
783 unpack_read(dev);
784 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
785 CLAW_DBF_TEXT(4, trace, "TskletXt");
786 return;
787} /* end of claw_irq_bh */
788
789/*-------------------------------------------------------------------*
790* claw_release *
791* *
792*--------------------------------------------------------------------*/
793static int
794claw_release(struct net_device *dev)
795{
796 int rc;
797 int i;
798 unsigned long saveflags;
799 unsigned long parm;
800 struct claw_privbk *privptr;
801 DECLARE_WAITQUEUE(wait, current);
802 struct ccwbk* p_this_ccw;
803 struct ccwbk* p_buf;
804
805 if (!dev)
806 return 0;
807 privptr = (struct claw_privbk *)dev->ml_priv;
808 if (!privptr)
809 return 0;
810 CLAW_DBF_TEXT(4, trace, "release");
811 privptr->release_pend=1;
812 claw_setbit_busy(TB_STOP,dev);
813 for ( i = 1; i >=0 ; i--) {
814 spin_lock_irqsave(
815 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
816 /* del_timer(&privptr->channel[READ_CHANNEL].timer); */
817 privptr->channel[i].claw_state = CLAW_STOP;
818 privptr->channel[i].IO_active = 0;
819 parm = (unsigned long) &privptr->channel[i];
820 if (i == WRITE_CHANNEL)
821 claw_purge_skb_queue(
822 &privptr->channel[WRITE_CHANNEL].collect_queue);
823 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
824 if (privptr->system_validate_comp==0x00) /* never opened? */
825 init_waitqueue_head(&privptr->channel[i].wait);
826 add_wait_queue(&privptr->channel[i].wait, &wait);
827 set_current_state(TASK_INTERRUPTIBLE);
828 spin_unlock_irqrestore(
829 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
830 schedule();
831 set_current_state(TASK_RUNNING);
832 remove_wait_queue(&privptr->channel[i].wait, &wait);
833 if (rc != 0) {
834 ccw_check_return_code(privptr->channel[i].cdev, rc);
835 }
836 }
837 if (privptr->pk_skb != NULL) {
838 dev_kfree_skb_any(privptr->pk_skb);
839 privptr->pk_skb = NULL;
840 }
841 if(privptr->buffs_alloc != 1) {
842 CLAW_DBF_TEXT(4, trace, "none2fre");
843 return 0;
844 }
845 CLAW_DBF_TEXT(4, trace, "freebufs");
846 if (privptr->p_buff_ccw != NULL) {
847 free_pages((unsigned long)privptr->p_buff_ccw,
848 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
849 }
850 CLAW_DBF_TEXT(4, trace, "freeread");
851 if (privptr->p_env->read_size < PAGE_SIZE) {
852 if (privptr->p_buff_read != NULL) {
853 free_pages((unsigned long)privptr->p_buff_read,
854 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
855 }
856 }
857 else {
858 p_buf=privptr->p_read_active_first;
859 while (p_buf!=NULL) {
860 free_pages((unsigned long)p_buf->p_buffer,
861 (int)pages_to_order_of_mag(
862 privptr->p_buff_pages_perread ));
863 p_buf=p_buf->next;
864 }
865 }
866 CLAW_DBF_TEXT(4, trace, "freewrit");
867 if (privptr->p_env->write_size < PAGE_SIZE ) {
868 free_pages((unsigned long)privptr->p_buff_write,
869 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
870 }
871 else {
872 p_buf=privptr->p_write_active_first;
873 while (p_buf!=NULL) {
874 free_pages((unsigned long)p_buf->p_buffer,
875 (int)pages_to_order_of_mag(
876 privptr->p_buff_pages_perwrite ));
877 p_buf=p_buf->next;
878 }
879 }
880 CLAW_DBF_TEXT(4, trace, "clearptr");
881 privptr->buffs_alloc = 0;
882 privptr->p_buff_ccw=NULL;
883 privptr->p_buff_read=NULL;
884 privptr->p_buff_write=NULL;
885 privptr->system_validate_comp=0;
886 privptr->release_pend=0;
887 /* Remove any writes that were pending and reset all reads */
888 p_this_ccw=privptr->p_read_active_first;
889 while (p_this_ccw!=NULL) {
890 p_this_ccw->header.length=0xffff;
891 p_this_ccw->header.opcode=0xff;
892 p_this_ccw->header.flag=0x00;
893 p_this_ccw=p_this_ccw->next;
894 }
895
896 while (privptr->p_write_active_first!=NULL) {
897 p_this_ccw=privptr->p_write_active_first;
898 p_this_ccw->header.flag=CLAW_PENDING;
899 privptr->p_write_active_first=p_this_ccw->next;
900 p_this_ccw->next=privptr->p_write_free_chain;
901 privptr->p_write_free_chain=p_this_ccw;
902 ++privptr->write_free_count;
903 }
904 privptr->p_write_active_last=NULL;
905 privptr->mtc_logical_link = -1;
906 privptr->mtc_skipping = 1;
907 privptr->mtc_offset=0;
908
909 if (((privptr->channel[READ_CHANNEL].last_dstat |
910 privptr->channel[WRITE_CHANNEL].last_dstat) &
911 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
912 dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev,
913 "Deactivating %s completed with incorrect"
914 " subchannel status "
915 "(read %02x, write %02x)\n",
916 dev->name,
917 privptr->channel[READ_CHANNEL].last_dstat,
918 privptr->channel[WRITE_CHANNEL].last_dstat);
919 CLAW_DBF_TEXT(2, trace, "badclose");
920 }
921 CLAW_DBF_TEXT(4, trace, "rlsexit");
922 return 0;
923} /* end of claw_release */
924
925/*-------------------------------------------------------------------*
926* claw_write_retry *
927* *
928*--------------------------------------------------------------------*/
929
930static void
931claw_write_retry ( struct chbk *p_ch )
932{
933
934 struct net_device *dev=p_ch->ndev;
935
936 CLAW_DBF_TEXT(4, trace, "w_retry");
937 if (p_ch->claw_state == CLAW_STOP) {
938 return;
939 }
940 claw_strt_out_IO( dev );
941 CLAW_DBF_TEXT(4, trace, "rtry_xit");
942 return;
943} /* end of claw_write_retry */
944
945
946/*-------------------------------------------------------------------*
947* claw_write_next *
948* *
949*--------------------------------------------------------------------*/
950
951static void
952claw_write_next ( struct chbk * p_ch )
953{
954
955 struct net_device *dev;
956 struct claw_privbk *privptr=NULL;
957 struct sk_buff *pk_skb;
958
959 CLAW_DBF_TEXT(4, trace, "claw_wrt");
960 if (p_ch->claw_state == CLAW_STOP)
961 return;
962 dev = (struct net_device *) p_ch->ndev;
963 privptr = (struct claw_privbk *) dev->ml_priv;
964 claw_free_wrt_buf( dev );
965 if ((privptr->write_free_count > 0) &&
966 !skb_queue_empty(&p_ch->collect_queue)) {
967 pk_skb = claw_pack_skb(privptr);
968 while (pk_skb != NULL) {
969 claw_hw_tx(pk_skb, dev, 1);
970 if (privptr->write_free_count > 0) {
971 pk_skb = claw_pack_skb(privptr);
972 } else
973 pk_skb = NULL;
974 }
975 }
976 if (privptr->p_write_active_first!=NULL) {
977 claw_strt_out_IO(dev);
978 }
979 return;
980} /* end of claw_write_next */
981
982/*-------------------------------------------------------------------*
983* *
984* claw_timer *
985*--------------------------------------------------------------------*/
986
987static void
988claw_timer ( struct chbk * p_ch )
989{
990 CLAW_DBF_TEXT(4, trace, "timer");
991 p_ch->flag |= CLAW_TIMER;
992 wake_up(&p_ch->wait);
993 return;
994} /* end of claw_timer */
995
996/*
997*
998* functions
999*/
1000
1001
1002/*-------------------------------------------------------------------*
1003* *
1004* pages_to_order_of_mag *
1005* *
1006* takes a number of pages from 1 to 512 and returns the *
1007* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1008* of magnitude get_free_pages() has an upper order of 9 *
1009*--------------------------------------------------------------------*/
1010
1011static int
1012pages_to_order_of_mag(int num_of_pages)
1013{
1014 int order_of_mag=1; /* assume 2 pages */
1015 int nump;
1016
1017 CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
1018 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1019 /* 512 pages = 2Meg on 4k page systems */
1020 if (num_of_pages >= 512) {return 9; }
1021 /* we have two or more pages order is at least 1 */
1022 for (nump=2 ;nump <= 512;nump*=2) {
1023 if (num_of_pages <= nump)
1024 break;
1025 order_of_mag +=1;
1026 }
1027 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
1028 CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1029 return order_of_mag;
1030}
1031
1032/*-------------------------------------------------------------------*
1033* *
1034* add_claw_reads *
1035* *
1036*--------------------------------------------------------------------*/
1037static int
1038add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1039 struct ccwbk* p_last)
1040{
1041 struct claw_privbk *privptr;
1042 struct ccw1 temp_ccw;
1043 struct endccw * p_end;
1044 CLAW_DBF_TEXT(4, trace, "addreads");
1045 privptr = dev->ml_priv;
1046 p_end = privptr->p_end_ccw;
1047
1048 /* first CCW and last CCW contains a new set of read channel programs
1049 * to apend the running channel programs
1050 */
1051 if ( p_first==NULL) {
1052 CLAW_DBF_TEXT(4, trace, "addexit");
1053 return 0;
1054 }
1055
1056 /* set up ending CCW sequence for this segment */
1057 if (p_end->read1) {
1058 p_end->read1=0x00; /* second ending CCW is now active */
1059 /* reset ending CCWs and setup TIC CCWs */
1060 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1061 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1062 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1063 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1064 p_end->read2_nop2.cda=0;
1065 p_end->read2_nop2.count=1;
1066 }
1067 else {
1068 p_end->read1=0x01; /* first ending CCW is now active */
1069 /* reset ending CCWs and setup TIC CCWs */
1070 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1071 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1072 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1073 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1074 p_end->read1_nop2.cda=0;
1075 p_end->read1_nop2.count=1;
1076 }
1077
1078 if ( privptr-> p_read_active_first ==NULL ) {
1079 privptr->p_read_active_first = p_first; /* set new first */
1080 privptr->p_read_active_last = p_last; /* set new last */
1081 }
1082 else {
1083
1084 /* set up TIC ccw */
1085 temp_ccw.cda= (__u32)__pa(&p_first->read);
1086 temp_ccw.count=0;
1087 temp_ccw.flags=0;
1088 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1089
1090
1091 if (p_end->read1) {
1092
1093 /* first set of CCW's is chained to the new read */
1094 /* chain, so the second set is chained to the active chain. */
1095 /* Therefore modify the second set to point to the new */
1096 /* read chain set up TIC CCWs */
1097 /* make sure we update the CCW so channel doesn't fetch it */
1098 /* when it's only half done */
1099 memcpy( &p_end->read2_nop2, &temp_ccw ,
1100 sizeof(struct ccw1));
1101 privptr->p_read_active_last->r_TIC_1.cda=
1102 (__u32)__pa(&p_first->read);
1103 privptr->p_read_active_last->r_TIC_2.cda=
1104 (__u32)__pa(&p_first->read);
1105 }
1106 else {
1107 /* make sure we update the CCW so channel doesn't */
1108 /* fetch it when it is only half done */
1109 memcpy( &p_end->read1_nop2, &temp_ccw ,
1110 sizeof(struct ccw1));
1111 privptr->p_read_active_last->r_TIC_1.cda=
1112 (__u32)__pa(&p_first->read);
1113 privptr->p_read_active_last->r_TIC_2.cda=
1114 (__u32)__pa(&p_first->read);
1115 }
1116 /* chain in new set of blocks */
1117 privptr->p_read_active_last->next = p_first;
1118 privptr->p_read_active_last=p_last;
1119 } /* end of if ( privptr-> p_read_active_first ==NULL) */
1120 CLAW_DBF_TEXT(4, trace, "addexit");
1121 return 0;
1122} /* end of add_claw_reads */
1123
1124/*-------------------------------------------------------------------*
1125 * ccw_check_return_code *
1126 * *
1127 *-------------------------------------------------------------------*/
1128
1129static void
1130ccw_check_return_code(struct ccw_device *cdev, int return_code)
1131{
1132 CLAW_DBF_TEXT(4, trace, "ccwret");
1133 if (return_code != 0) {
1134 switch (return_code) {
1135 case -EBUSY: /* BUSY is a transient state no action needed */
1136 break;
1137 case -ENODEV:
1138 dev_err(&cdev->dev, "The remote channel adapter is not"
1139 " available\n");
1140 break;
1141 case -EINVAL:
1142 dev_err(&cdev->dev,
1143 "The status of the remote channel adapter"
1144 " is not valid\n");
1145 break;
1146 default:
1147 dev_err(&cdev->dev, "The common device layer"
1148 " returned error code %d\n",
1149 return_code);
1150 }
1151 }
1152 CLAW_DBF_TEXT(4, trace, "ccwret");
1153} /* end of ccw_check_return_code */
1154
1155/*-------------------------------------------------------------------*
1156* ccw_check_unit_check *
1157*--------------------------------------------------------------------*/
1158
1159static void
1160ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1161{
1162 struct net_device *ndev = p_ch->ndev;
1163 struct device *dev = &p_ch->cdev->dev;
1164
1165 CLAW_DBF_TEXT(4, trace, "unitchek");
1166 dev_warn(dev, "The communication peer of %s disconnected\n",
1167 ndev->name);
1168
1169 if (sense & 0x40) {
1170 if (sense & 0x01) {
1171 dev_warn(dev, "The remote channel adapter for"
1172 " %s has been reset\n",
1173 ndev->name);
1174 }
1175 } else if (sense & 0x20) {
1176 if (sense & 0x04) {
1177 dev_warn(dev, "A data streaming timeout occurred"
1178 " for %s\n",
1179 ndev->name);
1180 } else if (sense & 0x10) {
1181 dev_warn(dev, "The remote channel adapter for %s"
1182 " is faulty\n",
1183 ndev->name);
1184 } else {
1185 dev_warn(dev, "A data transfer parity error occurred"
1186 " for %s\n",
1187 ndev->name);
1188 }
1189 } else if (sense & 0x10) {
1190 dev_warn(dev, "A read data parity error occurred"
1191 " for %s\n",
1192 ndev->name);
1193 }
1194
1195} /* end of ccw_check_unit_check */
1196
1197/*-------------------------------------------------------------------*
1198* find_link *
1199*--------------------------------------------------------------------*/
1200static int
1201find_link(struct net_device *dev, char *host_name, char *ws_name )
1202{
1203 struct claw_privbk *privptr;
1204 struct claw_env *p_env;
1205 int rc=0;
1206
1207 CLAW_DBF_TEXT(2, setup, "findlink");
1208 privptr = dev->ml_priv;
1209 p_env=privptr->p_env;
1210 switch (p_env->packing)
1211 {
1212 case PACKING_ASK:
1213 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1214 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1215 rc = EINVAL;
1216 break;
1217 case DO_PACKED:
1218 case PACK_SEND:
1219 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1220 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1221 rc = EINVAL;
1222 break;
1223 default:
1224 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1225 (memcmp(p_env->api_type , ws_name, 8)!=0))
1226 rc = EINVAL;
1227 break;
1228 }
1229
1230 return rc;
1231} /* end of find_link */
1232
1233/*-------------------------------------------------------------------*
1234 * claw_hw_tx *
1235 * *
1236 * *
1237 *-------------------------------------------------------------------*/
1238
1239static int
1240claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1241{
1242 int rc=0;
1243 struct claw_privbk *privptr;
1244 struct ccwbk *p_this_ccw;
1245 struct ccwbk *p_first_ccw;
1246 struct ccwbk *p_last_ccw;
1247 __u32 numBuffers;
1248 signed long len_of_data;
1249 unsigned long bytesInThisBuffer;
1250 unsigned char *pDataAddress;
1251 struct endccw *pEnd;
1252 struct ccw1 tempCCW;
1253 struct claw_env *p_env;
1254 struct clawph *pk_head;
1255 struct chbk *ch;
1256
1257 CLAW_DBF_TEXT(4, trace, "hw_tx");
1258 privptr = (struct claw_privbk *)(dev->ml_priv);
1259 p_env =privptr->p_env;
1260 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1261 /* scan the write queue to free any completed write packets */
1262 p_first_ccw=NULL;
1263 p_last_ccw=NULL;
1264 if ((p_env->packing >= PACK_SEND) &&
1265 (skb->cb[1] != 'P')) {
1266 skb_push(skb,sizeof(struct clawph));
1267 pk_head=(struct clawph *)skb->data;
1268 pk_head->len=skb->len-sizeof(struct clawph);
1269 if (pk_head->len%4) {
1270 pk_head->len+= 4-(pk_head->len%4);
1271 skb_pad(skb,4-(pk_head->len%4));
1272 skb_put(skb,4-(pk_head->len%4));
1273 }
1274 if (p_env->packing == DO_PACKED)
1275 pk_head->link_num = linkid;
1276 else
1277 pk_head->link_num = 0;
1278 pk_head->flag = 0x00;
1279 skb_pad(skb,4);
1280 skb->cb[1] = 'P';
1281 }
1282 if (linkid == 0) {
1283 if (claw_check_busy(dev)) {
1284 if (privptr->write_free_count!=0) {
1285 claw_clear_busy(dev);
1286 }
1287 else {
1288 claw_strt_out_IO(dev );
1289 claw_free_wrt_buf( dev );
1290 if (privptr->write_free_count==0) {
1291 ch = &privptr->channel[WRITE_CHANNEL];
1292 atomic_inc(&skb->users);
1293 skb_queue_tail(&ch->collect_queue, skb);
1294 goto Done;
1295 }
1296 else {
1297 claw_clear_busy(dev);
1298 }
1299 }
1300 }
1301 /* tx lock */
1302 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1303 ch = &privptr->channel[WRITE_CHANNEL];
1304 atomic_inc(&skb->users);
1305 skb_queue_tail(&ch->collect_queue, skb);
1306 claw_strt_out_IO(dev );
1307 rc=-EBUSY;
1308 goto Done2;
1309 }
1310 }
1311 /* See how many write buffers are required to hold this data */
1312 numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1313
1314 /* If that number of buffers isn't available, give up for now */
1315 if (privptr->write_free_count < numBuffers ||
1316 privptr->p_write_free_chain == NULL ) {
1317
1318 claw_setbit_busy(TB_NOBUFFER,dev);
1319 ch = &privptr->channel[WRITE_CHANNEL];
1320 atomic_inc(&skb->users);
1321 skb_queue_tail(&ch->collect_queue, skb);
1322 CLAW_DBF_TEXT(2, trace, "clawbusy");
1323 goto Done2;
1324 }
1325 pDataAddress=skb->data;
1326 len_of_data=skb->len;
1327
1328 while (len_of_data > 0) {
1329 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1330 if (p_this_ccw == NULL) { /* lost the race */
1331 ch = &privptr->channel[WRITE_CHANNEL];
1332 atomic_inc(&skb->users);
1333 skb_queue_tail(&ch->collect_queue, skb);
1334 goto Done2;
1335 }
1336 privptr->p_write_free_chain=p_this_ccw->next;
1337 p_this_ccw->next=NULL;
1338 --privptr->write_free_count; /* -1 */
1339 if (len_of_data >= privptr->p_env->write_size)
1340 bytesInThisBuffer = privptr->p_env->write_size;
1341 else
1342 bytesInThisBuffer = len_of_data;
1343 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1344 len_of_data-=bytesInThisBuffer;
1345 pDataAddress+=(unsigned long)bytesInThisBuffer;
1346 /* setup write CCW */
1347 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1348 if (len_of_data>0) {
1349 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1350 }
1351 p_this_ccw->write.count=bytesInThisBuffer;
1352 /* now add to end of this chain */
1353 if (p_first_ccw==NULL) {
1354 p_first_ccw=p_this_ccw;
1355 }
1356 if (p_last_ccw!=NULL) {
1357 p_last_ccw->next=p_this_ccw;
1358 /* set up TIC ccws */
1359 p_last_ccw->w_TIC_1.cda=
1360 (__u32)__pa(&p_this_ccw->write);
1361 }
1362 p_last_ccw=p_this_ccw; /* save new last block */
1363 }
1364
1365 /* FirstCCW and LastCCW now contain a new set of write channel
1366 * programs to append to the running channel program
1367 */
1368
1369 if (p_first_ccw!=NULL) {
1370 /* setup ending ccw sequence for this segment */
1371 pEnd=privptr->p_end_ccw;
1372 if (pEnd->write1) {
1373 pEnd->write1=0x00; /* second end ccw is now active */
1374 /* set up Tic CCWs */
1375 p_last_ccw->w_TIC_1.cda=
1376 (__u32)__pa(&pEnd->write2_nop1);
1377 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1378 pEnd->write2_nop2.flags =
1379 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1380 pEnd->write2_nop2.cda=0;
1381 pEnd->write2_nop2.count=1;
1382 }
1383 else { /* end of if (pEnd->write1)*/
1384 pEnd->write1=0x01; /* first end ccw is now active */
1385 /* set up Tic CCWs */
1386 p_last_ccw->w_TIC_1.cda=
1387 (__u32)__pa(&pEnd->write1_nop1);
1388 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1389 pEnd->write1_nop2.flags =
1390 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1391 pEnd->write1_nop2.cda=0;
1392 pEnd->write1_nop2.count=1;
1393 } /* end if if (pEnd->write1) */
1394
1395 if (privptr->p_write_active_first==NULL ) {
1396 privptr->p_write_active_first=p_first_ccw;
1397 privptr->p_write_active_last=p_last_ccw;
1398 }
1399 else {
1400 /* set up Tic CCWs */
1401
1402 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1403 tempCCW.count=0;
1404 tempCCW.flags=0;
1405 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1406
1407 if (pEnd->write1) {
1408
1409 /*
1410 * first set of ending CCW's is chained to the new write
1411 * chain, so the second set is chained to the active chain
1412 * Therefore modify the second set to point the new write chain.
1413 * make sure we update the CCW atomically
1414 * so channel does not fetch it when it's only half done
1415 */
1416 memcpy( &pEnd->write2_nop2, &tempCCW ,
1417 sizeof(struct ccw1));
1418 privptr->p_write_active_last->w_TIC_1.cda=
1419 (__u32)__pa(&p_first_ccw->write);
1420 }
1421 else {
1422
1423 /*make sure we update the CCW atomically
1424 *so channel does not fetch it when it's only half done
1425 */
1426 memcpy(&pEnd->write1_nop2, &tempCCW ,
1427 sizeof(struct ccw1));
1428 privptr->p_write_active_last->w_TIC_1.cda=
1429 (__u32)__pa(&p_first_ccw->write);
1430
1431 } /* end if if (pEnd->write1) */
1432
1433 privptr->p_write_active_last->next=p_first_ccw;
1434 privptr->p_write_active_last=p_last_ccw;
1435 }
1436
1437 } /* endif (p_first_ccw!=NULL) */
1438 dev_kfree_skb_any(skb);
1439 claw_strt_out_IO(dev );
1440 /* if write free count is zero , set NOBUFFER */
1441 if (privptr->write_free_count==0) {
1442 claw_setbit_busy(TB_NOBUFFER,dev);
1443 }
1444Done2:
1445 claw_clearbit_busy(TB_TX,dev);
1446Done:
1447 return(rc);
1448} /* end of claw_hw_tx */
1449
1450/*-------------------------------------------------------------------*
1451* *
1452* init_ccw_bk *
1453* *
1454*--------------------------------------------------------------------*/
1455
1456static int
1457init_ccw_bk(struct net_device *dev)
1458{
1459
1460 __u32 ccw_blocks_required;
1461 __u32 ccw_blocks_perpage;
1462 __u32 ccw_pages_required;
1463 __u32 claw_reads_perpage=1;
1464 __u32 claw_read_pages;
1465 __u32 claw_writes_perpage=1;
1466 __u32 claw_write_pages;
1467 void *p_buff=NULL;
1468 struct ccwbk*p_free_chain;
1469 struct ccwbk*p_buf;
1470 struct ccwbk*p_last_CCWB;
1471 struct ccwbk*p_first_CCWB;
1472 struct endccw *p_endccw=NULL;
1473 addr_t real_address;
1474 struct claw_privbk *privptr = dev->ml_priv;
1475 struct clawh *pClawH=NULL;
1476 addr_t real_TIC_address;
1477 int i,j;
1478 CLAW_DBF_TEXT(4, trace, "init_ccw");
1479
1480 /* initialize statistics field */
1481 privptr->active_link_ID=0;
1482 /* initialize ccwbk pointers */
1483 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
1484 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1485 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
1486 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
1487 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
1488 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
1489 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
1490 privptr->buffs_alloc = 0;
1491 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1492 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1493 /* initialize free write ccwbk counter */
1494 privptr->write_free_count=0; /* number of free bufs on write chain */
1495 p_last_CCWB = NULL;
1496 p_first_CCWB= NULL;
1497 /*
1498 * We need 1 CCW block for each read buffer, 1 for each
1499 * write buffer, plus 1 for ClawSignalBlock
1500 */
1501 ccw_blocks_required =
1502 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1503 /*
1504 * compute number of CCW blocks that will fit in a page
1505 */
1506 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
1507 ccw_pages_required=
1508 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1509
1510 /*
1511 * read and write sizes are set by 2 constants in claw.h
1512 * 4k and 32k. Unpacked values other than 4k are not going to
1513 * provide good performance. With packing buffers support 32k
1514 * buffers are used.
1515 */
1516 if (privptr->p_env->read_size < PAGE_SIZE) {
1517 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1518 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1519 claw_reads_perpage);
1520 }
1521 else { /* > or equal */
1522 privptr->p_buff_pages_perread =
1523 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1524 claw_read_pages = privptr->p_env->read_buffers *
1525 privptr->p_buff_pages_perread;
1526 }
1527 if (privptr->p_env->write_size < PAGE_SIZE) {
1528 claw_writes_perpage =
1529 PAGE_SIZE / privptr->p_env->write_size;
1530 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1531 claw_writes_perpage);
1532
1533 }
1534 else { /* > or equal */
1535 privptr->p_buff_pages_perwrite =
1536 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1537 claw_write_pages = privptr->p_env->write_buffers *
1538 privptr->p_buff_pages_perwrite;
1539 }
1540 /*
1541 * allocate ccw_pages_required
1542 */
1543 if (privptr->p_buff_ccw==NULL) {
1544 privptr->p_buff_ccw=
1545 (void *)__get_free_pages(__GFP_DMA,
1546 (int)pages_to_order_of_mag(ccw_pages_required ));
1547 if (privptr->p_buff_ccw==NULL) {
1548 return -ENOMEM;
1549 }
1550 privptr->p_buff_ccw_num=ccw_pages_required;
1551 }
1552 memset(privptr->p_buff_ccw, 0x00,
1553 privptr->p_buff_ccw_num * PAGE_SIZE);
1554
1555 /*
1556 * obtain ending ccw block address
1557 *
1558 */
1559 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1560 real_address = (__u32)__pa(privptr->p_end_ccw);
1561 /* Initialize ending CCW block */
1562 p_endccw=privptr->p_end_ccw;
1563 p_endccw->real=real_address;
1564 p_endccw->write1=0x00;
1565 p_endccw->read1=0x00;
1566
1567 /* write1_nop1 */
1568 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1569 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1570 p_endccw->write1_nop1.count = 1;
1571 p_endccw->write1_nop1.cda = 0;
1572
1573 /* write1_nop2 */
1574 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1575 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1576 p_endccw->write1_nop2.count = 1;
1577 p_endccw->write1_nop2.cda = 0;
1578
1579 /* write2_nop1 */
1580 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1581 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1582 p_endccw->write2_nop1.count = 1;
1583 p_endccw->write2_nop1.cda = 0;
1584
1585 /* write2_nop2 */
1586 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1587 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1588 p_endccw->write2_nop2.count = 1;
1589 p_endccw->write2_nop2.cda = 0;
1590
1591 /* read1_nop1 */
1592 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1593 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1594 p_endccw->read1_nop1.count = 1;
1595 p_endccw->read1_nop1.cda = 0;
1596
1597 /* read1_nop2 */
1598 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1599 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1600 p_endccw->read1_nop2.count = 1;
1601 p_endccw->read1_nop2.cda = 0;
1602
1603 /* read2_nop1 */
1604 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1605 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1606 p_endccw->read2_nop1.count = 1;
1607 p_endccw->read2_nop1.cda = 0;
1608
1609 /* read2_nop2 */
1610 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1611 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1612 p_endccw->read2_nop2.count = 1;
1613 p_endccw->read2_nop2.cda = 0;
1614
1615 /*
1616 * Build a chain of CCWs
1617 *
1618 */
1619 p_buff=privptr->p_buff_ccw;
1620
1621 p_free_chain=NULL;
1622 for (i=0 ; i < ccw_pages_required; i++ ) {
1623 real_address = (__u32)__pa(p_buff);
1624 p_buf=p_buff;
1625 for (j=0 ; j < ccw_blocks_perpage ; j++) {
1626 p_buf->next = p_free_chain;
1627 p_free_chain = p_buf;
1628 p_buf->real=(__u32)__pa(p_buf);
1629 ++p_buf;
1630 }
1631 p_buff+=PAGE_SIZE;
1632 }
1633 /*
1634 * Initialize ClawSignalBlock
1635 *
1636 */
1637 if (privptr->p_claw_signal_blk==NULL) {
1638 privptr->p_claw_signal_blk=p_free_chain;
1639 p_free_chain=p_free_chain->next;
1640 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1641 pClawH->length=0xffff;
1642 pClawH->opcode=0xff;
1643 pClawH->flag=CLAW_BUSY;
1644 }
1645
1646 /*
1647 * allocate write_pages_required and add to free chain
1648 */
1649 if (privptr->p_buff_write==NULL) {
1650 if (privptr->p_env->write_size < PAGE_SIZE) {
1651 privptr->p_buff_write=
1652 (void *)__get_free_pages(__GFP_DMA,
1653 (int)pages_to_order_of_mag(claw_write_pages ));
1654 if (privptr->p_buff_write==NULL) {
1655 privptr->p_buff_ccw=NULL;
1656 return -ENOMEM;
1657 }
1658 /*
1659 * Build CLAW write free chain
1660 *
1661 */
1662
1663 memset(privptr->p_buff_write, 0x00,
1664 ccw_pages_required * PAGE_SIZE);
1665 privptr->p_write_free_chain=NULL;
1666
1667 p_buff=privptr->p_buff_write;
1668
1669 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1670 p_buf = p_free_chain; /* get a CCW */
1671 p_free_chain = p_buf->next;
1672 p_buf->next =privptr->p_write_free_chain;
1673 privptr->p_write_free_chain = p_buf;
1674 p_buf-> p_buffer = (struct clawbuf *)p_buff;
1675 p_buf-> write.cda = (__u32)__pa(p_buff);
1676 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1677 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1678 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1679 p_buf-> w_read_FF.count = 1;
1680 p_buf-> w_read_FF.cda =
1681 (__u32)__pa(&p_buf-> header.flag);
1682 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1683 p_buf-> w_TIC_1.flags = 0;
1684 p_buf-> w_TIC_1.count = 0;
1685
1686 if (((unsigned long)p_buff +
1687 privptr->p_env->write_size) >=
1688 ((unsigned long)(p_buff+2*
1689 (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1690 p_buff = p_buff+privptr->p_env->write_size;
1691 }
1692 }
1693 }
1694 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1695 {
1696 privptr->p_write_free_chain=NULL;
1697 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1698 p_buff=(void *)__get_free_pages(__GFP_DMA,
1699 (int)pages_to_order_of_mag(
1700 privptr->p_buff_pages_perwrite) );
1701 if (p_buff==NULL) {
1702 free_pages((unsigned long)privptr->p_buff_ccw,
1703 (int)pages_to_order_of_mag(
1704 privptr->p_buff_ccw_num));
1705 privptr->p_buff_ccw=NULL;
1706 p_buf=privptr->p_buff_write;
1707 while (p_buf!=NULL) {
1708 free_pages((unsigned long)
1709 p_buf->p_buffer,
1710 (int)pages_to_order_of_mag(
1711 privptr->p_buff_pages_perwrite));
1712 p_buf=p_buf->next;
1713 }
1714 return -ENOMEM;
1715 } /* Error on get_pages */
1716 memset(p_buff, 0x00, privptr->p_env->write_size );
1717 p_buf = p_free_chain;
1718 p_free_chain = p_buf->next;
1719 p_buf->next = privptr->p_write_free_chain;
1720 privptr->p_write_free_chain = p_buf;
1721 privptr->p_buff_write = p_buf;
1722 p_buf->p_buffer=(struct clawbuf *)p_buff;
1723 p_buf-> write.cda = (__u32)__pa(p_buff);
1724 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1725 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1726 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1727 p_buf-> w_read_FF.count = 1;
1728 p_buf-> w_read_FF.cda =
1729 (__u32)__pa(&p_buf-> header.flag);
1730 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1731 p_buf-> w_TIC_1.flags = 0;
1732 p_buf-> w_TIC_1.count = 0;
1733 } /* for all write_buffers */
1734
1735 } /* else buffers are PAGE_SIZE or bigger */
1736
1737 }
1738 privptr->p_buff_write_num=claw_write_pages;
1739 privptr->write_free_count=privptr->p_env->write_buffers;
1740
1741
1742 /*
1743 * allocate read_pages_required and chain to free chain
1744 */
1745 if (privptr->p_buff_read==NULL) {
1746 if (privptr->p_env->read_size < PAGE_SIZE) {
1747 privptr->p_buff_read=
1748 (void *)__get_free_pages(__GFP_DMA,
1749 (int)pages_to_order_of_mag(claw_read_pages) );
1750 if (privptr->p_buff_read==NULL) {
1751 free_pages((unsigned long)privptr->p_buff_ccw,
1752 (int)pages_to_order_of_mag(
1753 privptr->p_buff_ccw_num));
1754 /* free the write pages size is < page size */
1755 free_pages((unsigned long)privptr->p_buff_write,
1756 (int)pages_to_order_of_mag(
1757 privptr->p_buff_write_num));
1758 privptr->p_buff_ccw=NULL;
1759 privptr->p_buff_write=NULL;
1760 return -ENOMEM;
1761 }
1762 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1763 privptr->p_buff_read_num=claw_read_pages;
1764 /*
1765 * Build CLAW read free chain
1766 *
1767 */
1768 p_buff=privptr->p_buff_read;
1769 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1770 p_buf = p_free_chain;
1771 p_free_chain = p_buf->next;
1772
1773 if (p_last_CCWB==NULL) {
1774 p_buf->next=NULL;
1775 real_TIC_address=0;
1776 p_last_CCWB=p_buf;
1777 }
1778 else {
1779 p_buf->next=p_first_CCWB;
1780 real_TIC_address=
1781 (__u32)__pa(&p_first_CCWB -> read );
1782 }
1783
1784 p_first_CCWB=p_buf;
1785
1786 p_buf->p_buffer=(struct clawbuf *)p_buff;
1787 /* initialize read command */
1788 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1789 p_buf-> read.cda = (__u32)__pa(p_buff);
1790 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1791 p_buf-> read.count = privptr->p_env->read_size;
1792
1793 /* initialize read_h command */
1794 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1795 p_buf-> read_h.cda =
1796 (__u32)__pa(&(p_buf->header));
1797 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1798 p_buf-> read_h.count = sizeof(struct clawh);
1799
1800 /* initialize Signal command */
1801 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1802 p_buf-> signal.cda =
1803 (__u32)__pa(&(pClawH->flag));
1804 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1805 p_buf-> signal.count = 1;
1806
1807 /* initialize r_TIC_1 command */
1808 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1809 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1810 p_buf-> r_TIC_1.flags = 0;
1811 p_buf-> r_TIC_1.count = 0;
1812
1813 /* initialize r_read_FF command */
1814 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1815 p_buf-> r_read_FF.cda =
1816 (__u32)__pa(&(pClawH->flag));
1817 p_buf-> r_read_FF.flags =
1818 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1819 p_buf-> r_read_FF.count = 1;
1820
1821 /* initialize r_TIC_2 */
1822 memcpy(&p_buf->r_TIC_2,
1823 &p_buf->r_TIC_1, sizeof(struct ccw1));
1824
1825 /* initialize Header */
1826 p_buf->header.length=0xffff;
1827 p_buf->header.opcode=0xff;
1828 p_buf->header.flag=CLAW_PENDING;
1829
1830 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1831 ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1832 -1)
1833 & PAGE_MASK)) {
1834 p_buff= p_buff+privptr->p_env->read_size;
1835 }
1836 else {
1837 p_buff=
1838 (void *)((unsigned long)
1839 (p_buff+2*(privptr->p_env->read_size)-1)
1840 & PAGE_MASK) ;
1841 }
1842 } /* for read_buffers */
1843 } /* read_size < PAGE_SIZE */
1844 else { /* read Size >= PAGE_SIZE */
1845 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1846 p_buff = (void *)__get_free_pages(__GFP_DMA,
1847 (int)pages_to_order_of_mag(
1848 privptr->p_buff_pages_perread));
1849 if (p_buff==NULL) {
1850 free_pages((unsigned long)privptr->p_buff_ccw,
1851 (int)pages_to_order_of_mag(privptr->
1852 p_buff_ccw_num));
1853 /* free the write pages */
1854 p_buf=privptr->p_buff_write;
1855 while (p_buf!=NULL) {
1856 free_pages(
1857 (unsigned long)p_buf->p_buffer,
1858 (int)pages_to_order_of_mag(
1859 privptr->p_buff_pages_perwrite));
1860 p_buf=p_buf->next;
1861 }
1862 /* free any read pages already alloc */
1863 p_buf=privptr->p_buff_read;
1864 while (p_buf!=NULL) {
1865 free_pages(
1866 (unsigned long)p_buf->p_buffer,
1867 (int)pages_to_order_of_mag(
1868 privptr->p_buff_pages_perread));
1869 p_buf=p_buf->next;
1870 }
1871 privptr->p_buff_ccw=NULL;
1872 privptr->p_buff_write=NULL;
1873 return -ENOMEM;
1874 }
1875 memset(p_buff, 0x00, privptr->p_env->read_size);
1876 p_buf = p_free_chain;
1877 privptr->p_buff_read = p_buf;
1878 p_free_chain = p_buf->next;
1879
1880 if (p_last_CCWB==NULL) {
1881 p_buf->next=NULL;
1882 real_TIC_address=0;
1883 p_last_CCWB=p_buf;
1884 }
1885 else {
1886 p_buf->next=p_first_CCWB;
1887 real_TIC_address=
1888 (addr_t)__pa(
1889 &p_first_CCWB -> read );
1890 }
1891
1892 p_first_CCWB=p_buf;
1893 /* save buff address */
1894 p_buf->p_buffer=(struct clawbuf *)p_buff;
1895 /* initialize read command */
1896 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1897 p_buf-> read.cda = (__u32)__pa(p_buff);
1898 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1899 p_buf-> read.count = privptr->p_env->read_size;
1900
1901 /* initialize read_h command */
1902 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1903 p_buf-> read_h.cda =
1904 (__u32)__pa(&(p_buf->header));
1905 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1906 p_buf-> read_h.count = sizeof(struct clawh);
1907
1908 /* initialize Signal command */
1909 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1910 p_buf-> signal.cda =
1911 (__u32)__pa(&(pClawH->flag));
1912 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1913 p_buf-> signal.count = 1;
1914
1915 /* initialize r_TIC_1 command */
1916 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1917 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1918 p_buf-> r_TIC_1.flags = 0;
1919 p_buf-> r_TIC_1.count = 0;
1920
1921 /* initialize r_read_FF command */
1922 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1923 p_buf-> r_read_FF.cda =
1924 (__u32)__pa(&(pClawH->flag));
1925 p_buf-> r_read_FF.flags =
1926 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1927 p_buf-> r_read_FF.count = 1;
1928
1929 /* initialize r_TIC_2 */
1930 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
1931 sizeof(struct ccw1));
1932
1933 /* initialize Header */
1934 p_buf->header.length=0xffff;
1935 p_buf->header.opcode=0xff;
1936 p_buf->header.flag=CLAW_PENDING;
1937
1938 } /* For read_buffers */
1939 } /* read_size >= PAGE_SIZE */
1940 } /* pBuffread = NULL */
1941 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
1942 privptr->buffs_alloc = 1;
1943
1944 return 0;
1945} /* end of init_ccw_bk */
1946
1947/*-------------------------------------------------------------------*
1948* *
1949* probe_error *
1950* *
1951*--------------------------------------------------------------------*/
1952
1953static void
1954probe_error( struct ccwgroup_device *cgdev)
1955{
1956 struct claw_privbk *privptr;
1957
1958 CLAW_DBF_TEXT(4, trace, "proberr");
1959 privptr = dev_get_drvdata(&cgdev->dev);
1960 if (privptr != NULL) {
1961 dev_set_drvdata(&cgdev->dev, NULL);
1962 kfree(privptr->p_env);
1963 kfree(privptr->p_mtc_envelope);
1964 kfree(privptr);
1965 }
1966} /* probe_error */
1967
1968/*-------------------------------------------------------------------*
1969* claw_process_control *
1970* *
1971* *
1972*--------------------------------------------------------------------*/
1973
1974static int
1975claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
1976{
1977
1978 struct clawbuf *p_buf;
1979 struct clawctl ctlbk;
1980 struct clawctl *p_ctlbk;
1981 char temp_host_name[8];
1982 char temp_ws_name[8];
1983 struct claw_privbk *privptr;
1984 struct claw_env *p_env;
1985 struct sysval *p_sysval;
1986 struct conncmd *p_connect=NULL;
1987 int rc;
1988 struct chbk *p_ch = NULL;
1989 struct device *tdev;
1990 CLAW_DBF_TEXT(2, setup, "clw_cntl");
1991 udelay(1000); /* Wait a ms for the control packets to
1992 *catch up to each other */
1993 privptr = dev->ml_priv;
1994 p_env=privptr->p_env;
1995 tdev = &privptr->channel[READ_CHANNEL].cdev->dev;
1996 memcpy( &temp_host_name, p_env->host_name, 8);
1997 memcpy( &temp_ws_name, p_env->adapter_name , 8);
1998 dev_info(tdev, "%s: CLAW device %.8s: "
1999 "Received Control Packet\n",
2000 dev->name, temp_ws_name);
2001 if (privptr->release_pend==1) {
2002 return 0;
2003 }
2004 p_buf=p_ccw->p_buffer;
2005 p_ctlbk=&ctlbk;
2006 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2007 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2008 } else {
2009 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2010 }
2011 switch (p_ctlbk->command)
2012 {
2013 case SYSTEM_VALIDATE_REQUEST:
2014 if (p_ctlbk->version != CLAW_VERSION_ID) {
2015 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2016 CLAW_RC_WRONG_VERSION);
2017 dev_warn(tdev, "The communication peer of %s"
2018 " uses an incorrect API version %d\n",
2019 dev->name, p_ctlbk->version);
2020 }
2021 p_sysval = (struct sysval *)&(p_ctlbk->data);
2022 dev_info(tdev, "%s: Recv Sys Validate Request: "
2023 "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2024 "Host name=%.8s\n",
2025 dev->name, p_ctlbk->version,
2026 p_ctlbk->linkid,
2027 p_ctlbk->correlator,
2028 p_sysval->WS_name,
2029 p_sysval->host_name);
2030 if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2031 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2032 CLAW_RC_NAME_MISMATCH);
2033 CLAW_DBF_TEXT(2, setup, "HSTBAD");
2034 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2035 CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
2036 dev_warn(tdev,
2037 "Host name %s for %s does not match the"
2038 " remote adapter name %s\n",
2039 p_sysval->host_name,
2040 dev->name,
2041 temp_host_name);
2042 }
2043 if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2044 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2045 CLAW_RC_NAME_MISMATCH);
2046 CLAW_DBF_TEXT(2, setup, "WSNBAD");
2047 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2048 CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
2049 dev_warn(tdev, "Adapter name %s for %s does not match"
2050 " the remote host name %s\n",
2051 p_sysval->WS_name,
2052 dev->name,
2053 temp_ws_name);
2054 }
2055 if ((p_sysval->write_frame_size < p_env->write_size) &&
2056 (p_env->packing == 0)) {
2057 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2058 CLAW_RC_HOST_RCV_TOO_SMALL);
2059 dev_warn(tdev,
2060 "The local write buffer is smaller than the"
2061 " remote read buffer\n");
2062 CLAW_DBF_TEXT(2, setup, "wrtszbad");
2063 }
2064 if ((p_sysval->read_frame_size < p_env->read_size) &&
2065 (p_env->packing == 0)) {
2066 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2067 CLAW_RC_HOST_RCV_TOO_SMALL);
2068 dev_warn(tdev,
2069 "The local read buffer is smaller than the"
2070 " remote write buffer\n");
2071 CLAW_DBF_TEXT(2, setup, "rdsizbad");
2072 }
2073 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
2074 dev_info(tdev,
2075 "CLAW device %.8s: System validate"
2076 " completed.\n", temp_ws_name);
2077 dev_info(tdev,
2078 "%s: sys Validate Rsize:%d Wsize:%d\n",
2079 dev->name, p_sysval->read_frame_size,
2080 p_sysval->write_frame_size);
2081 privptr->system_validate_comp = 1;
2082 if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2083 p_env->packing = PACKING_ASK;
2084 claw_strt_conn_req(dev);
2085 break;
2086 case SYSTEM_VALIDATE_RESPONSE:
2087 p_sysval = (struct sysval *)&(p_ctlbk->data);
2088 dev_info(tdev,
2089 "Settings for %s validated (version=%d, "
2090 "remote device=%d, rc=%d, adapter name=%.8s, "
2091 "host name=%.8s)\n",
2092 dev->name,
2093 p_ctlbk->version,
2094 p_ctlbk->correlator,
2095 p_ctlbk->rc,
2096 p_sysval->WS_name,
2097 p_sysval->host_name);
2098 switch (p_ctlbk->rc) {
2099 case 0:
2100 dev_info(tdev, "%s: CLAW device "
2101 "%.8s: System validate completed.\n",
2102 dev->name, temp_ws_name);
2103 if (privptr->system_validate_comp == 0)
2104 claw_strt_conn_req(dev);
2105 privptr->system_validate_comp = 1;
2106 break;
2107 case CLAW_RC_NAME_MISMATCH:
2108 dev_warn(tdev, "Validating %s failed because of"
2109 " a host or adapter name mismatch\n",
2110 dev->name);
2111 break;
2112 case CLAW_RC_WRONG_VERSION:
2113 dev_warn(tdev, "Validating %s failed because of a"
2114 " version conflict\n",
2115 dev->name);
2116 break;
2117 case CLAW_RC_HOST_RCV_TOO_SMALL:
2118 dev_warn(tdev, "Validating %s failed because of a"
2119 " frame size conflict\n",
2120 dev->name);
2121 break;
2122 default:
2123 dev_warn(tdev, "The communication peer of %s rejected"
2124 " the connection\n",
2125 dev->name);
2126 break;
2127 }
2128 break;
2129
2130 case CONNECTION_REQUEST:
2131 p_connect = (struct conncmd *)&(p_ctlbk->data);
2132 dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
2133 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2134 dev->name,
2135 p_ctlbk->version,
2136 p_ctlbk->linkid,
2137 p_ctlbk->correlator,
2138 p_connect->host_name,
2139 p_connect->WS_name);
2140 if (privptr->active_link_ID != 0) {
2141 claw_snd_disc(dev, p_ctlbk);
2142 dev_info(tdev, "%s rejected a connection request"
2143 " because it is already active\n",
2144 dev->name);
2145 }
2146 if (p_ctlbk->linkid != 1) {
2147 claw_snd_disc(dev, p_ctlbk);
2148 dev_info(tdev, "%s rejected a request to open multiple"
2149 " connections\n",
2150 dev->name);
2151 }
2152 rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2153 if (rc != 0) {
2154 claw_snd_disc(dev, p_ctlbk);
2155 dev_info(tdev, "%s rejected a connection request"
2156 " because of a type mismatch\n",
2157 dev->name);
2158 }
2159 claw_send_control(dev,
2160 CONNECTION_CONFIRM, p_ctlbk->linkid,
2161 p_ctlbk->correlator,
2162 0, p_connect->host_name,
2163 p_connect->WS_name);
2164 if (p_env->packing == PACKING_ASK) {
2165 p_env->packing = PACK_SEND;
2166 claw_snd_conn_req(dev, 0);
2167 }
2168 dev_info(tdev, "%s: CLAW device %.8s: Connection "
2169 "completed link_id=%d.\n",
2170 dev->name, temp_ws_name,
2171 p_ctlbk->linkid);
2172 privptr->active_link_ID = p_ctlbk->linkid;
2173 p_ch = &privptr->channel[WRITE_CHANNEL];
2174 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2175 break;
2176 case CONNECTION_RESPONSE:
2177 p_connect = (struct conncmd *)&(p_ctlbk->data);
2178 dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
2179 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2180 dev->name,
2181 p_ctlbk->version,
2182 p_ctlbk->linkid,
2183 p_ctlbk->correlator,
2184 p_ctlbk->rc,
2185 p_connect->host_name,
2186 p_connect->WS_name);
2187
2188 if (p_ctlbk->rc != 0) {
2189 dev_warn(tdev, "The communication peer of %s rejected"
2190 " a connection request\n",
2191 dev->name);
2192 return 1;
2193 }
2194 rc = find_link(dev,
2195 p_connect->host_name, p_connect->WS_name);
2196 if (rc != 0) {
2197 claw_snd_disc(dev, p_ctlbk);
2198 dev_warn(tdev, "The communication peer of %s"
2199 " rejected a connection "
2200 "request because of a type mismatch\n",
2201 dev->name);
2202 }
2203 /* should be until CONNECTION_CONFIRM */
2204 privptr->active_link_ID = -(p_ctlbk->linkid);
2205 break;
2206 case CONNECTION_CONFIRM:
2207 p_connect = (struct conncmd *)&(p_ctlbk->data);
2208 dev_info(tdev,
2209 "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
2210 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
2211 dev->name,
2212 p_ctlbk->version,
2213 p_ctlbk->linkid,
2214 p_ctlbk->correlator,
2215 p_connect->host_name,
2216 p_connect->WS_name);
2217 if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2218 privptr->active_link_ID = p_ctlbk->linkid;
2219 if (p_env->packing > PACKING_ASK) {
2220 dev_info(tdev,
2221 "%s: Confirmed Now packing\n", dev->name);
2222 p_env->packing = DO_PACKED;
2223 }
2224 p_ch = &privptr->channel[WRITE_CHANNEL];
2225 wake_up(&p_ch->wait);
2226 } else {
2227 dev_warn(tdev, "Activating %s failed because of"
2228 " an incorrect link ID=%d\n",
2229 dev->name, p_ctlbk->linkid);
2230 claw_snd_disc(dev, p_ctlbk);
2231 }
2232 break;
2233 case DISCONNECT:
2234 dev_info(tdev, "%s: Disconnect: "
2235 "Vers=%d,link_id=%d,Corr=%d\n",
2236 dev->name, p_ctlbk->version,
2237 p_ctlbk->linkid, p_ctlbk->correlator);
2238 if ((p_ctlbk->linkid == 2) &&
2239 (p_env->packing == PACK_SEND)) {
2240 privptr->active_link_ID = 1;
2241 p_env->packing = DO_PACKED;
2242 } else
2243 privptr->active_link_ID = 0;
2244 break;
2245 case CLAW_ERROR:
2246 dev_warn(tdev, "The communication peer of %s failed\n",
2247 dev->name);
2248 break;
2249 default:
2250 dev_warn(tdev, "The communication peer of %s sent"
2251 " an unknown command code\n",
2252 dev->name);
2253 break;
2254 }
2255
2256 return 0;
2257} /* end of claw_process_control */
2258
2259
2260/*-------------------------------------------------------------------*
2261* claw_send_control *
2262* *
2263*--------------------------------------------------------------------*/
2264
2265static int
2266claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2267 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2268{
2269 struct claw_privbk *privptr;
2270 struct clawctl *p_ctl;
2271 struct sysval *p_sysval;
2272 struct conncmd *p_connect;
2273 struct sk_buff *skb;
2274
2275 CLAW_DBF_TEXT(2, setup, "sndcntl");
2276 privptr = dev->ml_priv;
2277 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2278
2279 p_ctl->command=type;
2280 p_ctl->version=CLAW_VERSION_ID;
2281 p_ctl->linkid=link;
2282 p_ctl->correlator=correlator;
2283 p_ctl->rc=rc;
2284
2285 p_sysval=(struct sysval *)&p_ctl->data;
2286 p_connect=(struct conncmd *)&p_ctl->data;
2287
2288 switch (p_ctl->command) {
2289 case SYSTEM_VALIDATE_REQUEST:
2290 case SYSTEM_VALIDATE_RESPONSE:
2291 memcpy(&p_sysval->host_name, local_name, 8);
2292 memcpy(&p_sysval->WS_name, remote_name, 8);
2293 if (privptr->p_env->packing > 0) {
2294 p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2295 p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
2296 } else {
2297 /* how big is the biggest group of packets */
2298 p_sysval->read_frame_size =
2299 privptr->p_env->read_size;
2300 p_sysval->write_frame_size =
2301 privptr->p_env->write_size;
2302 }
2303 memset(&p_sysval->reserved, 0x00, 4);
2304 break;
2305 case CONNECTION_REQUEST:
2306 case CONNECTION_RESPONSE:
2307 case CONNECTION_CONFIRM:
2308 case DISCONNECT:
2309 memcpy(&p_sysval->host_name, local_name, 8);
2310 memcpy(&p_sysval->WS_name, remote_name, 8);
2311 if (privptr->p_env->packing > 0) {
2312 /* How big is the biggest packet */
2313 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2314 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2315 } else {
2316 memset(&p_connect->reserved1, 0x00, 4);
2317 memset(&p_connect->reserved2, 0x00, 4);
2318 }
2319 break;
2320 default:
2321 break;
2322 }
2323
2324 /* write Control Record to the device */
2325
2326
2327 skb = dev_alloc_skb(sizeof(struct clawctl));
2328 if (!skb) {
2329 return -ENOMEM;
2330 }
2331 memcpy(skb_put(skb, sizeof(struct clawctl)),
2332 p_ctl, sizeof(struct clawctl));
2333 if (privptr->p_env->packing >= PACK_SEND)
2334 claw_hw_tx(skb, dev, 1);
2335 else
2336 claw_hw_tx(skb, dev, 0);
2337 return 0;
2338} /* end of claw_send_control */
2339
2340/*-------------------------------------------------------------------*
2341* claw_snd_conn_req *
2342* *
2343*--------------------------------------------------------------------*/
2344static int
2345claw_snd_conn_req(struct net_device *dev, __u8 link)
2346{
2347 int rc;
2348 struct claw_privbk *privptr = dev->ml_priv;
2349 struct clawctl *p_ctl;
2350
2351 CLAW_DBF_TEXT(2, setup, "snd_conn");
2352 rc = 1;
2353 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2354 p_ctl->linkid = link;
2355 if ( privptr->system_validate_comp==0x00 ) {
2356 return rc;
2357 }
2358 if (privptr->p_env->packing == PACKING_ASK )
2359 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2360 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2361 if (privptr->p_env->packing == PACK_SEND) {
2362 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2363 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2364 }
2365 if (privptr->p_env->packing == 0)
2366 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2367 HOST_APPL_NAME, privptr->p_env->api_type);
2368 return rc;
2369
2370} /* end of claw_snd_conn_req */
2371
2372
2373/*-------------------------------------------------------------------*
2374* claw_snd_disc *
2375* *
2376*--------------------------------------------------------------------*/
2377
2378static int
2379claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2380{
2381 int rc;
2382 struct conncmd * p_connect;
2383
2384 CLAW_DBF_TEXT(2, setup, "snd_dsc");
2385 p_connect=(struct conncmd *)&p_ctl->data;
2386
2387 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2388 p_ctl->correlator, 0,
2389 p_connect->host_name, p_connect->WS_name);
2390 return rc;
2391} /* end of claw_snd_disc */
2392
2393
2394/*-------------------------------------------------------------------*
2395* claw_snd_sys_validate_rsp *
2396* *
2397*--------------------------------------------------------------------*/
2398
2399static int
2400claw_snd_sys_validate_rsp(struct net_device *dev,
2401 struct clawctl *p_ctl, __u32 return_code)
2402{
2403 struct claw_env * p_env;
2404 struct claw_privbk *privptr;
2405 int rc;
2406
2407 CLAW_DBF_TEXT(2, setup, "chkresp");
2408 privptr = dev->ml_priv;
2409 p_env=privptr->p_env;
2410 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2411 p_ctl->linkid,
2412 p_ctl->correlator,
2413 return_code,
2414 p_env->host_name,
2415 p_env->adapter_name );
2416 return rc;
2417} /* end of claw_snd_sys_validate_rsp */
2418
2419/*-------------------------------------------------------------------*
2420* claw_strt_conn_req *
2421* *
2422*--------------------------------------------------------------------*/
2423
2424static int
2425claw_strt_conn_req(struct net_device *dev )
2426{
2427 int rc;
2428
2429 CLAW_DBF_TEXT(2, setup, "conn_req");
2430 rc=claw_snd_conn_req(dev, 1);
2431 return rc;
2432} /* end of claw_strt_conn_req */
2433
2434
2435
2436/*-------------------------------------------------------------------*
2437 * claw_stats *
2438 *-------------------------------------------------------------------*/
2439
2440static struct
2441net_device_stats *claw_stats(struct net_device *dev)
2442{
2443 struct claw_privbk *privptr;
2444
2445 CLAW_DBF_TEXT(4, trace, "stats");
2446 privptr = dev->ml_priv;
2447 return &privptr->stats;
2448} /* end of claw_stats */
2449
2450
2451/*-------------------------------------------------------------------*
2452* unpack_read *
2453* *
2454*--------------------------------------------------------------------*/
2455static void
2456unpack_read(struct net_device *dev )
2457{
2458 struct sk_buff *skb;
2459 struct claw_privbk *privptr;
2460 struct claw_env *p_env;
2461 struct ccwbk *p_this_ccw;
2462 struct ccwbk *p_first_ccw;
2463 struct ccwbk *p_last_ccw;
2464 struct clawph *p_packh;
2465 void *p_packd;
2466 struct clawctl *p_ctlrec=NULL;
2467 struct device *p_dev;
2468
2469 __u32 len_of_data;
2470 __u32 pack_off;
2471 __u8 link_num;
2472 __u8 mtc_this_frm=0;
2473 __u32 bytes_to_mov;
2474 int i=0;
2475 int p=0;
2476
2477 CLAW_DBF_TEXT(4, trace, "unpkread");
2478 p_first_ccw=NULL;
2479 p_last_ccw=NULL;
2480 p_packh=NULL;
2481 p_packd=NULL;
2482 privptr = dev->ml_priv;
2483
2484 p_dev = &privptr->channel[READ_CHANNEL].cdev->dev;
2485 p_env = privptr->p_env;
2486 p_this_ccw=privptr->p_read_active_first;
2487 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
2488 pack_off = 0;
2489 p = 0;
2490 p_this_ccw->header.flag=CLAW_PENDING;
2491 privptr->p_read_active_first=p_this_ccw->next;
2492 p_this_ccw->next=NULL;
2493 p_packh = (struct clawph *)p_this_ccw->p_buffer;
2494 if ((p_env->packing == PACK_SEND) &&
2495 (p_packh->len == 32) &&
2496 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
2497 p_packh++; /* peek past pack header */
2498 p_ctlrec = (struct clawctl *)p_packh;
2499 p_packh--; /* un peek */
2500 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2501 (p_ctlrec->command == CONNECTION_CONFIRM))
2502 p_env->packing = DO_PACKED;
2503 }
2504 if (p_env->packing == DO_PACKED)
2505 link_num=p_packh->link_num;
2506 else
2507 link_num=p_this_ccw->header.opcode / 8;
2508 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
2509 mtc_this_frm=1;
2510 if (p_this_ccw->header.length!=
2511 privptr->p_env->read_size ) {
2512 dev_warn(p_dev,
2513 "The communication peer of %s"
2514 " sent a faulty"
2515 " frame of length %02x\n",
2516 dev->name, p_this_ccw->header.length);
2517 }
2518 }
2519
2520 if (privptr->mtc_skipping) {
2521 /*
2522 * We're in the mode of skipping past a
2523 * multi-frame message
2524 * that we can't process for some reason or other.
2525 * The first frame without the More-To-Come flag is
2526 * the last frame of the skipped message.
2527 */
2528 /* in case of More-To-Come not set in this frame */
2529 if (mtc_this_frm==0) {
2530 privptr->mtc_skipping=0; /* Ok, the end */
2531 privptr->mtc_logical_link=-1;
2532 }
2533 goto NextFrame;
2534 }
2535
2536 if (link_num==0) {
2537 claw_process_control(dev, p_this_ccw);
2538 CLAW_DBF_TEXT(4, trace, "UnpkCntl");
2539 goto NextFrame;
2540 }
2541unpack_next:
2542 if (p_env->packing == DO_PACKED) {
2543 if (pack_off > p_env->read_size)
2544 goto NextFrame;
2545 p_packd = p_this_ccw->p_buffer+pack_off;
2546 p_packh = (struct clawph *) p_packd;
2547 if ((p_packh->len == 0) || /* done with this frame? */
2548 (p_packh->flag != 0))
2549 goto NextFrame;
2550 bytes_to_mov = p_packh->len;
2551 pack_off += bytes_to_mov+sizeof(struct clawph);
2552 p++;
2553 } else {
2554 bytes_to_mov=p_this_ccw->header.length;
2555 }
2556 if (privptr->mtc_logical_link<0) {
2557
2558 /*
2559 * if More-To-Come is set in this frame then we don't know
2560 * length of entire message, and hence have to allocate
2561 * large buffer */
2562
2563 /* We are starting a new envelope */
2564 privptr->mtc_offset=0;
2565 privptr->mtc_logical_link=link_num;
2566 }
2567
2568 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2569 /* error */
2570 privptr->stats.rx_frame_errors++;
2571 goto NextFrame;
2572 }
2573 if (p_env->packing == DO_PACKED) {
2574 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2575 p_packd+sizeof(struct clawph), bytes_to_mov);
2576
2577 } else {
2578 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2579 p_this_ccw->p_buffer, bytes_to_mov);
2580 }
2581 if (mtc_this_frm==0) {
2582 len_of_data=privptr->mtc_offset+bytes_to_mov;
2583 skb=dev_alloc_skb(len_of_data);
2584 if (skb) {
2585 memcpy(skb_put(skb,len_of_data),
2586 privptr->p_mtc_envelope,
2587 len_of_data);
2588 skb->dev=dev;
2589 skb_reset_mac_header(skb);
2590 skb->protocol=htons(ETH_P_IP);
2591 skb->ip_summed=CHECKSUM_UNNECESSARY;
2592 privptr->stats.rx_packets++;
2593 privptr->stats.rx_bytes+=len_of_data;
2594 netif_rx(skb);
2595 }
2596 else {
2597 dev_info(p_dev, "Allocating a buffer for"
2598 " incoming data failed\n");
2599 privptr->stats.rx_dropped++;
2600 }
2601 privptr->mtc_offset=0;
2602 privptr->mtc_logical_link=-1;
2603 }
2604 else {
2605 privptr->mtc_offset+=bytes_to_mov;
2606 }
2607 if (p_env->packing == DO_PACKED)
2608 goto unpack_next;
2609NextFrame:
2610 /*
2611 * Remove ThisCCWblock from active read queue, and add it
2612 * to queue of free blocks to be reused.
2613 */
2614 i++;
2615 p_this_ccw->header.length=0xffff;
2616 p_this_ccw->header.opcode=0xff;
2617 /*
2618 * add this one to the free queue for later reuse
2619 */
2620 if (p_first_ccw==NULL) {
2621 p_first_ccw = p_this_ccw;
2622 }
2623 else {
2624 p_last_ccw->next = p_this_ccw;
2625 }
2626 p_last_ccw = p_this_ccw;
2627 /*
2628 * chain to next block on active read queue
2629 */
2630 p_this_ccw = privptr->p_read_active_first;
2631 CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
2632 } /* end of while */
2633
2634 /* check validity */
2635
2636 CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
2637 add_claw_reads(dev, p_first_ccw, p_last_ccw);
2638 claw_strt_read(dev, LOCK_YES);
2639 return;
2640} /* end of unpack_read */
2641
2642/*-------------------------------------------------------------------*
2643* claw_strt_read *
2644* *
2645*--------------------------------------------------------------------*/
2646static void
2647claw_strt_read (struct net_device *dev, int lock )
2648{
2649 int rc = 0;
2650 __u32 parm;
2651 unsigned long saveflags = 0;
2652 struct claw_privbk *privptr = dev->ml_priv;
2653 struct ccwbk*p_ccwbk;
2654 struct chbk *p_ch;
2655 struct clawh *p_clawh;
2656 p_ch = &privptr->channel[READ_CHANNEL];
2657
2658 CLAW_DBF_TEXT(4, trace, "StRdNter");
2659 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2660 p_clawh->flag=CLAW_IDLE; /* 0x00 */
2661
2662 if ((privptr->p_write_active_first!=NULL &&
2663 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2664 (privptr->p_read_active_first!=NULL &&
2665 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2666 p_clawh->flag=CLAW_BUSY; /* 0xff */
2667 }
2668 if (lock==LOCK_YES) {
2669 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2670 }
2671 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2672 CLAW_DBF_TEXT(4, trace, "HotRead");
2673 p_ccwbk=privptr->p_read_active_first;
2674 parm = (unsigned long) p_ch;
2675 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2676 0xff, 0);
2677 if (rc != 0) {
2678 ccw_check_return_code(p_ch->cdev, rc);
2679 }
2680 }
2681 else {
2682 CLAW_DBF_TEXT(2, trace, "ReadAct");
2683 }
2684
2685 if (lock==LOCK_YES) {
2686 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2687 }
2688 CLAW_DBF_TEXT(4, trace, "StRdExit");
2689 return;
2690} /* end of claw_strt_read */
2691
2692/*-------------------------------------------------------------------*
2693* claw_strt_out_IO *
2694* *
2695*--------------------------------------------------------------------*/
2696
2697static void
2698claw_strt_out_IO( struct net_device *dev )
2699{
2700 int rc = 0;
2701 unsigned long parm;
2702 struct claw_privbk *privptr;
2703 struct chbk *p_ch;
2704 struct ccwbk *p_first_ccw;
2705
2706 if (!dev) {
2707 return;
2708 }
2709 privptr = (struct claw_privbk *)dev->ml_priv;
2710 p_ch = &privptr->channel[WRITE_CHANNEL];
2711
2712 CLAW_DBF_TEXT(4, trace, "strt_io");
2713 p_first_ccw=privptr->p_write_active_first;
2714
2715 if (p_ch->claw_state == CLAW_STOP)
2716 return;
2717 if (p_first_ccw == NULL) {
2718 return;
2719 }
2720 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2721 parm = (unsigned long) p_ch;
2722 CLAW_DBF_TEXT(2, trace, "StWrtIO");
2723 rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2724 0xff, 0);
2725 if (rc != 0) {
2726 ccw_check_return_code(p_ch->cdev, rc);
2727 }
2728 }
2729 dev->trans_start = jiffies;
2730 return;
2731} /* end of claw_strt_out_IO */
2732
2733/*-------------------------------------------------------------------*
2734* Free write buffers *
2735* *
2736*--------------------------------------------------------------------*/
2737
2738static void
2739claw_free_wrt_buf( struct net_device *dev )
2740{
2741
2742 struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
2743 struct ccwbk*p_this_ccw;
2744 struct ccwbk*p_next_ccw;
2745
2746 CLAW_DBF_TEXT(4, trace, "freewrtb");
2747 /* scan the write queue to free any completed write packets */
2748 p_this_ccw=privptr->p_write_active_first;
2749 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2750 {
2751 p_next_ccw = p_this_ccw->next;
2752 if (((p_next_ccw!=NULL) &&
2753 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2754 ((p_this_ccw == privptr->p_write_active_last) &&
2755 (p_this_ccw->header.flag!=CLAW_PENDING))) {
2756 /* The next CCW is OK or this is */
2757 /* the last CCW...free it @A1A */
2758 privptr->p_write_active_first=p_this_ccw->next;
2759 p_this_ccw->header.flag=CLAW_PENDING;
2760 p_this_ccw->next=privptr->p_write_free_chain;
2761 privptr->p_write_free_chain=p_this_ccw;
2762 ++privptr->write_free_count;
2763 privptr->stats.tx_bytes+= p_this_ccw->write.count;
2764 p_this_ccw=privptr->p_write_active_first;
2765 privptr->stats.tx_packets++;
2766 }
2767 else {
2768 break;
2769 }
2770 }
2771 if (privptr->write_free_count!=0) {
2772 claw_clearbit_busy(TB_NOBUFFER,dev);
2773 }
2774 /* whole chain removed? */
2775 if (privptr->p_write_active_first==NULL) {
2776 privptr->p_write_active_last=NULL;
2777 }
2778 CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
2779 return;
2780}
2781
2782/*-------------------------------------------------------------------*
2783* claw free netdevice *
2784* *
2785*--------------------------------------------------------------------*/
2786static void
2787claw_free_netdevice(struct net_device * dev, int free_dev)
2788{
2789 struct claw_privbk *privptr;
2790
2791 CLAW_DBF_TEXT(2, setup, "free_dev");
2792 if (!dev)
2793 return;
2794 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2795 privptr = dev->ml_priv;
2796 if (dev->flags & IFF_RUNNING)
2797 claw_release(dev);
2798 if (privptr) {
2799 privptr->channel[READ_CHANNEL].ndev = NULL; /* say it's free */
2800 }
2801 dev->ml_priv = NULL;
2802#ifdef MODULE
2803 if (free_dev) {
2804 free_netdev(dev);
2805 }
2806#endif
2807 CLAW_DBF_TEXT(2, setup, "free_ok");
2808}
2809
2810/**
2811 * Claw init netdevice
2812 * Initialize everything of the net device except the name and the
2813 * channel structs.
2814 */
2815static const struct net_device_ops claw_netdev_ops = {
2816 .ndo_open = claw_open,
2817 .ndo_stop = claw_release,
2818 .ndo_get_stats = claw_stats,
2819 .ndo_start_xmit = claw_tx,
2820 .ndo_change_mtu = claw_change_mtu,
2821};
2822
2823static void
2824claw_init_netdevice(struct net_device * dev)
2825{
2826 CLAW_DBF_TEXT(2, setup, "init_dev");
2827 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
2828 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
2829 dev->hard_header_len = 0;
2830 dev->addr_len = 0;
2831 dev->type = ARPHRD_SLIP;
2832 dev->tx_queue_len = 1300;
2833 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2834 dev->netdev_ops = &claw_netdev_ops;
2835 CLAW_DBF_TEXT(2, setup, "initok");
2836 return;
2837}
2838
2839/**
2840 * Init a new channel in the privptr->channel[i].
2841 *
2842 * @param cdev The ccw_device to be added.
2843 *
2844 * @return 0 on success, !0 on error.
2845 */
2846static int
2847add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2848{
2849 struct chbk *p_ch;
2850 struct ccw_dev_id dev_id;
2851
2852 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
2853 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
2854 p_ch = &privptr->channel[i];
2855 p_ch->cdev = cdev;
2856 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
2857 ccw_device_get_id(cdev, &dev_id);
2858 p_ch->devno = dev_id.devno;
2859 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
2860 return -ENOMEM;
2861 }
2862 return 0;
2863}
2864
2865
2866/**
2867 *
2868 * Setup an interface.
2869 *
2870 * @param cgdev Device to be setup.
2871 *
2872 * @returns 0 on success, !0 on failure.
2873 */
2874static int
2875claw_new_device(struct ccwgroup_device *cgdev)
2876{
2877 struct claw_privbk *privptr;
2878 struct claw_env *p_env;
2879 struct net_device *dev;
2880 int ret;
2881 struct ccw_dev_id dev_id;
2882
2883 dev_info(&cgdev->dev, "add for %s\n",
2884 dev_name(&cgdev->cdev[READ_CHANNEL]->dev));
2885 CLAW_DBF_TEXT(2, setup, "new_dev");
2886 privptr = dev_get_drvdata(&cgdev->dev);
2887 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2888 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2889 if (!privptr)
2890 return -ENODEV;
2891 p_env = privptr->p_env;
2892 ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id);
2893 p_env->devno[READ_CHANNEL] = dev_id.devno;
2894 ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id);
2895 p_env->devno[WRITE_CHANNEL] = dev_id.devno;
2896 ret = add_channel(cgdev->cdev[0],0,privptr);
2897 if (ret == 0)
2898 ret = add_channel(cgdev->cdev[1],1,privptr);
2899 if (ret != 0) {
2900 dev_warn(&cgdev->dev, "Creating a CLAW group device"
2901 " failed with error code %d\n", ret);
2902 goto out;
2903 }
2904 ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]);
2905 if (ret != 0) {
2906 dev_warn(&cgdev->dev,
2907 "Setting the read subchannel online"
2908 " failed with error code %d\n", ret);
2909 goto out;
2910 }
2911 ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]);
2912 if (ret != 0) {
2913 dev_warn(&cgdev->dev,
2914 "Setting the write subchannel online "
2915 "failed with error code %d\n", ret);
2916 goto out;
2917 }
2918 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
2919 if (!dev) {
2920 dev_warn(&cgdev->dev,
2921 "Activating the CLAW device failed\n");
2922 goto out;
2923 }
2924 dev->ml_priv = privptr;
2925 dev_set_drvdata(&cgdev->dev, privptr);
2926 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2927 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
2928 /* sysfs magic */
2929 SET_NETDEV_DEV(dev, &cgdev->dev);
2930 if (register_netdev(dev) != 0) {
2931 claw_free_netdevice(dev, 1);
2932 CLAW_DBF_TEXT(2, trace, "regfail");
2933 goto out;
2934 }
2935 dev->flags &=~IFF_RUNNING;
2936 if (privptr->buffs_alloc == 0) {
2937 ret=init_ccw_bk(dev);
2938 if (ret !=0) {
2939 unregister_netdev(dev);
2940 claw_free_netdevice(dev,1);
2941 CLAW_DBF_TEXT(2, trace, "ccwmem");
2942 goto out;
2943 }
2944 }
2945 privptr->channel[READ_CHANNEL].ndev = dev;
2946 privptr->channel[WRITE_CHANNEL].ndev = dev;
2947 privptr->p_env->ndev = dev;
2948
2949 dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d "
2950 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
2951 dev->name, p_env->read_size,
2952 p_env->write_size, p_env->read_buffers,
2953 p_env->write_buffers, p_env->devno[READ_CHANNEL],
2954 p_env->devno[WRITE_CHANNEL]);
2955 dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
2956 ":%.8s api_type: %.8s\n",
2957 dev->name, p_env->host_name,
2958 p_env->adapter_name , p_env->api_type);
2959 return 0;
2960out:
2961 ccw_device_set_offline(cgdev->cdev[1]);
2962 ccw_device_set_offline(cgdev->cdev[0]);
2963 return -ENODEV;
2964}
2965
2966static void
2967claw_purge_skb_queue(struct sk_buff_head *q)
2968{
2969 struct sk_buff *skb;
2970
2971 CLAW_DBF_TEXT(4, trace, "purgque");
2972 while ((skb = skb_dequeue(q))) {
2973 atomic_dec(&skb->users);
2974 dev_kfree_skb_any(skb);
2975 }
2976}
2977
2978/**
2979 * Shutdown an interface.
2980 *
2981 * @param cgdev Device to be shut down.
2982 *
2983 * @returns 0 on success, !0 on failure.
2984 */
2985static int
2986claw_shutdown_device(struct ccwgroup_device *cgdev)
2987{
2988 struct claw_privbk *priv;
2989 struct net_device *ndev;
2990 int ret = 0;
2991
2992 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
2993 priv = dev_get_drvdata(&cgdev->dev);
2994 if (!priv)
2995 return -ENODEV;
2996 ndev = priv->channel[READ_CHANNEL].ndev;
2997 if (ndev) {
2998 /* Close the device */
2999 dev_info(&cgdev->dev, "%s: shutting down\n",
3000 ndev->name);
3001 if (ndev->flags & IFF_RUNNING)
3002 ret = claw_release(ndev);
3003 ndev->flags &=~IFF_RUNNING;
3004 unregister_netdev(ndev);
3005 ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
3006 claw_free_netdevice(ndev, 1);
3007 priv->channel[READ_CHANNEL].ndev = NULL;
3008 priv->channel[WRITE_CHANNEL].ndev = NULL;
3009 priv->p_env->ndev = NULL;
3010 }
3011 ccw_device_set_offline(cgdev->cdev[1]);
3012 ccw_device_set_offline(cgdev->cdev[0]);
3013 return ret;
3014}
3015
3016static void
3017claw_remove_device(struct ccwgroup_device *cgdev)
3018{
3019 struct claw_privbk *priv;
3020
3021 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
3022 priv = dev_get_drvdata(&cgdev->dev);
3023 dev_info(&cgdev->dev, " will be removed.\n");
3024 if (cgdev->state == CCWGROUP_ONLINE)
3025 claw_shutdown_device(cgdev);
3026 kfree(priv->p_mtc_envelope);
3027 priv->p_mtc_envelope=NULL;
3028 kfree(priv->p_env);
3029 priv->p_env=NULL;
3030 kfree(priv->channel[0].irb);
3031 priv->channel[0].irb=NULL;
3032 kfree(priv->channel[1].irb);
3033 priv->channel[1].irb=NULL;
3034 kfree(priv);
3035 dev_set_drvdata(&cgdev->dev, NULL);
3036 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL);
3037 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL);
3038 put_device(&cgdev->dev);
3039
3040 return;
3041}
3042
3043
3044/*
3045 * sysfs attributes
3046 */
3047static ssize_t
3048claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
3049{
3050 struct claw_privbk *priv;
3051 struct claw_env * p_env;
3052
3053 priv = dev_get_drvdata(dev);
3054 if (!priv)
3055 return -ENODEV;
3056 p_env = priv->p_env;
3057 return sprintf(buf, "%s\n",p_env->host_name);
3058}
3059
3060static ssize_t
3061claw_hname_write(struct device *dev, struct device_attribute *attr,
3062 const char *buf, size_t count)
3063{
3064 struct claw_privbk *priv;
3065 struct claw_env * p_env;
3066
3067 priv = dev_get_drvdata(dev);
3068 if (!priv)
3069 return -ENODEV;
3070 p_env = priv->p_env;
3071 if (count > MAX_NAME_LEN+1)
3072 return -EINVAL;
3073 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3074 strncpy(p_env->host_name,buf, count);
3075 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
3076 p_env->host_name[MAX_NAME_LEN] = 0x00;
3077 CLAW_DBF_TEXT(2, setup, "HstnSet");
3078 CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
3079
3080 return count;
3081}
3082
3083static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3084
3085static ssize_t
3086claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
3087{
3088 struct claw_privbk *priv;
3089 struct claw_env * p_env;
3090
3091 priv = dev_get_drvdata(dev);
3092 if (!priv)
3093 return -ENODEV;
3094 p_env = priv->p_env;
3095 return sprintf(buf, "%s\n", p_env->adapter_name);
3096}
3097
3098static ssize_t
3099claw_adname_write(struct device *dev, struct device_attribute *attr,
3100 const char *buf, size_t count)
3101{
3102 struct claw_privbk *priv;
3103 struct claw_env * p_env;
3104
3105 priv = dev_get_drvdata(dev);
3106 if (!priv)
3107 return -ENODEV;
3108 p_env = priv->p_env;
3109 if (count > MAX_NAME_LEN+1)
3110 return -EINVAL;
3111 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3112 strncpy(p_env->adapter_name,buf, count);
3113 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3114 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
3115 CLAW_DBF_TEXT(2, setup, "AdnSet");
3116 CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
3117
3118 return count;
3119}
3120
3121static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3122
3123static ssize_t
3124claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
3125{
3126 struct claw_privbk *priv;
3127 struct claw_env * p_env;
3128
3129 priv = dev_get_drvdata(dev);
3130 if (!priv)
3131 return -ENODEV;
3132 p_env = priv->p_env;
3133 return sprintf(buf, "%s\n",
3134 p_env->api_type);
3135}
3136
3137static ssize_t
3138claw_apname_write(struct device *dev, struct device_attribute *attr,
3139 const char *buf, size_t count)
3140{
3141 struct claw_privbk *priv;
3142 struct claw_env * p_env;
3143
3144 priv = dev_get_drvdata(dev);
3145 if (!priv)
3146 return -ENODEV;
3147 p_env = priv->p_env;
3148 if (count > MAX_NAME_LEN+1)
3149 return -EINVAL;
3150 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3151 strncpy(p_env->api_type,buf, count);
3152 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
3153 p_env->api_type[MAX_NAME_LEN] = 0x00;
3154 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3155 p_env->read_size=DEF_PACK_BUFSIZE;
3156 p_env->write_size=DEF_PACK_BUFSIZE;
3157 p_env->packing=PACKING_ASK;
3158 CLAW_DBF_TEXT(2, setup, "PACKING");
3159 }
3160 else {
3161 p_env->packing=0;
3162 p_env->read_size=CLAW_FRAME_SIZE;
3163 p_env->write_size=CLAW_FRAME_SIZE;
3164 CLAW_DBF_TEXT(2, setup, "ApiSet");
3165 }
3166 CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
3167 return count;
3168}
3169
3170static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3171
3172static ssize_t
3173claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3174{
3175 struct claw_privbk *priv;
3176 struct claw_env * p_env;
3177
3178 priv = dev_get_drvdata(dev);
3179 if (!priv)
3180 return -ENODEV;
3181 p_env = priv->p_env;
3182 return sprintf(buf, "%d\n", p_env->write_buffers);
3183}
3184
3185static ssize_t
3186claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3187 const char *buf, size_t count)
3188{
3189 struct claw_privbk *priv;
3190 struct claw_env * p_env;
3191 int nnn,max;
3192
3193 priv = dev_get_drvdata(dev);
3194 if (!priv)
3195 return -ENODEV;
3196 p_env = priv->p_env;
3197 sscanf(buf, "%i", &nnn);
3198 if (p_env->packing) {
3199 max = 64;
3200 }
3201 else {
3202 max = 512;
3203 }
3204 if ((nnn > max ) || (nnn < 2))
3205 return -EINVAL;
3206 p_env->write_buffers = nnn;
3207 CLAW_DBF_TEXT(2, setup, "Wbufset");
3208 CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
3209 return count;
3210}
3211
3212static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3213
3214static ssize_t
3215claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
3216{
3217 struct claw_privbk *priv;
3218 struct claw_env * p_env;
3219
3220 priv = dev_get_drvdata(dev);
3221 if (!priv)
3222 return -ENODEV;
3223 p_env = priv->p_env;
3224 return sprintf(buf, "%d\n", p_env->read_buffers);
3225}
3226
3227static ssize_t
3228claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3229 const char *buf, size_t count)
3230{
3231 struct claw_privbk *priv;
3232 struct claw_env *p_env;
3233 int nnn,max;
3234
3235 priv = dev_get_drvdata(dev);
3236 if (!priv)
3237 return -ENODEV;
3238 p_env = priv->p_env;
3239 sscanf(buf, "%i", &nnn);
3240 if (p_env->packing) {
3241 max = 64;
3242 }
3243 else {
3244 max = 512;
3245 }
3246 if ((nnn > max ) || (nnn < 2))
3247 return -EINVAL;
3248 p_env->read_buffers = nnn;
3249 CLAW_DBF_TEXT(2, setup, "Rbufset");
3250 CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
3251 return count;
3252}
3253static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3254
3255static struct attribute *claw_attr[] = {
3256 &dev_attr_read_buffer.attr,
3257 &dev_attr_write_buffer.attr,
3258 &dev_attr_adapter_name.attr,
3259 &dev_attr_api_type.attr,
3260 &dev_attr_host_name.attr,
3261 NULL,
3262};
3263static struct attribute_group claw_attr_group = {
3264 .attrs = claw_attr,
3265};
3266static const struct attribute_group *claw_attr_groups[] = {
3267 &claw_attr_group,
3268 NULL,
3269};
3270static const struct device_type claw_devtype = {
3271 .name = "claw",
3272 .groups = claw_attr_groups,
3273};
3274
3275/*----------------------------------------------------------------*
3276 * claw_probe *
3277 * this function is called for each CLAW device. *
3278 *----------------------------------------------------------------*/
3279static int claw_probe(struct ccwgroup_device *cgdev)
3280{
3281 struct claw_privbk *privptr = NULL;
3282
3283 CLAW_DBF_TEXT(2, setup, "probe");
3284 if (!get_device(&cgdev->dev))
3285 return -ENODEV;
3286 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
3287 dev_set_drvdata(&cgdev->dev, privptr);
3288 if (privptr == NULL) {
3289 probe_error(cgdev);
3290 put_device(&cgdev->dev);
3291 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
3292 return -ENOMEM;
3293 }
3294 privptr->p_mtc_envelope = kzalloc(MAX_ENVELOPE_SIZE, GFP_KERNEL);
3295 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
3296 if ((privptr->p_mtc_envelope == NULL) || (privptr->p_env == NULL)) {
3297 probe_error(cgdev);
3298 put_device(&cgdev->dev);
3299 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
3300 return -ENOMEM;
3301 }
3302 memcpy(privptr->p_env->adapter_name, WS_NAME_NOT_DEF, 8);
3303 memcpy(privptr->p_env->host_name, WS_NAME_NOT_DEF, 8);
3304 memcpy(privptr->p_env->api_type, WS_NAME_NOT_DEF, 8);
3305 privptr->p_env->packing = 0;
3306 privptr->p_env->write_buffers = 5;
3307 privptr->p_env->read_buffers = 5;
3308 privptr->p_env->read_size = CLAW_FRAME_SIZE;
3309 privptr->p_env->write_size = CLAW_FRAME_SIZE;
3310 privptr->p_env->p_priv = privptr;
3311 cgdev->cdev[0]->handler = claw_irq_handler;
3312 cgdev->cdev[1]->handler = claw_irq_handler;
3313 cgdev->dev.type = &claw_devtype;
3314 CLAW_DBF_TEXT(2, setup, "prbext 0");
3315
3316 return 0;
3317} /* end of claw_probe */
3318
3319/*--------------------------------------------------------------------*
3320* claw_init and cleanup *
3321*---------------------------------------------------------------------*/
3322
3323static void __exit claw_cleanup(void)
3324{
3325 ccwgroup_driver_unregister(&claw_group_driver);
3326 ccw_driver_unregister(&claw_ccw_driver);
3327 root_device_unregister(claw_root_dev);
3328 claw_unregister_debug_facility();
3329 pr_info("Driver unloaded\n");
3330}
3331
3332/**
3333 * Initialize module.
3334 * This is called just after the module is loaded.
3335 *
3336 * @return 0 on success, !0 on error.
3337 */
3338static int __init claw_init(void)
3339{
3340 int ret = 0;
3341
3342 pr_info("Loading %s\n", version);
3343 ret = claw_register_debug_facility();
3344 if (ret) {
3345 pr_err("Registering with the S/390 debug feature"
3346 " failed with error code %d\n", ret);
3347 goto out_err;
3348 }
3349 CLAW_DBF_TEXT(2, setup, "init_mod");
3350 claw_root_dev = root_device_register("claw");
3351 ret = IS_ERR(claw_root_dev) ? PTR_ERR(claw_root_dev) : 0;
3352 if (ret)
3353 goto register_err;
3354 ret = ccw_driver_register(&claw_ccw_driver);
3355 if (ret)
3356 goto ccw_err;
3357 claw_group_driver.driver.groups = claw_drv_attr_groups;
3358 ret = ccwgroup_driver_register(&claw_group_driver);
3359 if (ret)
3360 goto ccwgroup_err;
3361 return 0;
3362
3363ccwgroup_err:
3364 ccw_driver_unregister(&claw_ccw_driver);
3365ccw_err:
3366 root_device_unregister(claw_root_dev);
3367register_err:
3368 CLAW_DBF_TEXT(2, setup, "init_bad");
3369 claw_unregister_debug_facility();
3370out_err:
3371 pr_err("Initializing the claw device driver failed\n");
3372 return ret;
3373}
3374
3375module_init(claw_init);
3376module_exit(claw_cleanup);
3377
3378MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
3379MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
3380 "Copyright IBM Corp. 2000, 2008\n");
3381MODULE_LICENSE("GPL");