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s390/net: Delete useless checks before function calls
[mirror_ubuntu-zesty-kernel.git] / drivers / s390 / net / claw.c
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1da177e4 1/*
1da177e4
LT		 2 * ESCON CLAW network driver
3 *
8e84c801 4 * Linux for zSeries version
88efc2c5 5 * Copyright IBM Corp. 2002, 2009
1da177e4 6 * Author(s) Original code written by:
88efc2c5 7 * Kazuo Iimura <iimura@jp.ibm.com>
1da177e4 8 * Rewritten by
88efc2c5
FB		 9 * Andy Richter <richtera@us.ibm.com>
10 * Marc Price <mwprice@us.ibm.com>
1da177e4
LT		 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
b805da74 60 * 1.5
1da177e4 61 */
4811fcb7
AR		 62
63#define KMSG_COMPONENT "claw"
64
1da177e4
LT		 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>
1977f032 70#include <linux/bitops.h>
1da177e4
LT		 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>
1da177e4 91
1da177e4
LT		 92#include "claw.h"
93
b805da74
AR		 94/*
95 CLAW uses the s390dbf file system see claw_trace and claw_setup
1da177e4
LT		 96*/
97
4811fcb7 98static char version[] __initdata = "CLAW driver";
2b67fc46 99static char debug_buffer[255];
1da177e4
LT		 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{
b646c08e
ME		 112 debug_unregister(claw_dbf_setup);
113 debug_unregister(claw_dbf_trace);
1da177e4
LT		 114}
115
116static int
117claw_register_debug_facility(void)
118{
66a464db
MH		 119 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
120 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
1da177e4 121 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
1da177e4
LT		 122 claw_unregister_debug_facility();
123 return -ENOMEM;
124 }
125 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
126 debug_set_level(claw_dbf_setup, 2);
127 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
128 debug_set_level(claw_dbf_trace, 2);
129 return 0;
130}
131
132static inline void
133claw_set_busy(struct net_device *dev)
134{
6951df34 135 ((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
1da177e4
LT		 136}
137
138static inline void
139claw_clear_busy(struct net_device *dev)
140{
6951df34 141 clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
1da177e4 142 netif_wake_queue(dev);
1da177e4
LT		 143}
144
145static inline int
146claw_check_busy(struct net_device *dev)
147{
6951df34 148 return ((struct claw_privbk *) dev->ml_priv)->tbusy;
1da177e4
LT		 149}
150
151static inline void
152claw_setbit_busy(int nr,struct net_device *dev)
153{
154 netif_stop_queue(dev);
6951df34 155 set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
1da177e4
LT		 156}
157
158static inline void
159claw_clearbit_busy(int nr,struct net_device *dev)
160{
6951df34 161 clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
1da177e4
LT		 162 netif_wake_queue(dev);
163}
164
165static inline int
166claw_test_and_setbit_busy(int nr,struct net_device *dev)
167{
168 netif_stop_queue(dev);
169 return test_and_set_bit(nr,
6951df34 170 (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy));
1da177e4
LT		 171}
172
173
174/* Functions for the DEV methods */
175
176static int claw_probe(struct ccwgroup_device *cgdev);
177static void claw_remove_device(struct ccwgroup_device *cgdev);
178static void claw_purge_skb_queue(struct sk_buff_head *q);
179static int claw_new_device(struct ccwgroup_device *cgdev);
180static int claw_shutdown_device(struct ccwgroup_device *cgdev);
181static int claw_tx(struct sk_buff *skb, struct net_device *dev);
182static int claw_change_mtu( struct net_device *dev, int new_mtu);
183static int claw_open(struct net_device *dev);
184static void claw_irq_handler(struct ccw_device *cdev,
185 unsigned long intparm, struct irb *irb);
186static void claw_irq_tasklet ( unsigned long data );
187static int claw_release(struct net_device *dev);
188static void claw_write_retry ( struct chbk * p_ch );
189static void claw_write_next ( struct chbk * p_ch );
190static void claw_timer ( struct chbk * p_ch );
191
192/* Functions */
193static int add_claw_reads(struct net_device *dev,
194 struct ccwbk* p_first, struct ccwbk* p_last);
4d284cac
HC		 195static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
196static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
1da177e4
LT		 197static int find_link(struct net_device *dev, char *host_name, char *ws_name );
198static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
199static int init_ccw_bk(struct net_device *dev);
200static void probe_error( struct ccwgroup_device *cgdev);
201static struct net_device_stats *claw_stats(struct net_device *dev);
4d284cac 202static int pages_to_order_of_mag(int num_of_pages);
1da177e4 203static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
1da177e4 204/* sysfs Functions */
4811fcb7
AR		 205static ssize_t claw_hname_show(struct device *dev,
206 struct device_attribute *attr, char *buf);
207static ssize_t claw_hname_write(struct device *dev,
208 struct device_attribute *attr,
1da177e4 209 const char *buf, size_t count);
4811fcb7
AR		 210static ssize_t claw_adname_show(struct device *dev,
211 struct device_attribute *attr, char *buf);
212static ssize_t claw_adname_write(struct device *dev,
213 struct device_attribute *attr,
1da177e4 214 const char *buf, size_t count);
4811fcb7
AR		 215static ssize_t claw_apname_show(struct device *dev,
216 struct device_attribute *attr, char *buf);
217static ssize_t claw_apname_write(struct device *dev,
218 struct device_attribute *attr,
1da177e4 219 const char *buf, size_t count);
4811fcb7
AR		 220static ssize_t claw_wbuff_show(struct device *dev,
221 struct device_attribute *attr, char *buf);
222static ssize_t claw_wbuff_write(struct device *dev,
223 struct device_attribute *attr,
1da177e4 224 const char *buf, size_t count);
4811fcb7
AR		 225static ssize_t claw_rbuff_show(struct device *dev,
226 struct device_attribute *attr, char *buf);
227static ssize_t claw_rbuff_write(struct device *dev,
228 struct device_attribute *attr,
1da177e4 229 const char *buf, size_t count);
1da177e4
LT		 230
231/* Functions for System Validate */
232static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
233static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
234 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
235static int claw_snd_conn_req(struct net_device *dev, __u8 link);
236static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
237static int claw_snd_sys_validate_rsp(struct net_device *dev,
238 struct clawctl * p_ctl, __u32 return_code);
239static int claw_strt_conn_req(struct net_device *dev );
b805da74
AR		 240static void claw_strt_read(struct net_device *dev, int lock);
241static void claw_strt_out_IO(struct net_device *dev);
242static void claw_free_wrt_buf(struct net_device *dev);
1da177e4
LT		 243
244/* Functions for unpack reads */
b805da74 245static void unpack_read(struct net_device *dev);
1da177e4 246
88efc2c5
FB		 247static int claw_pm_prepare(struct ccwgroup_device *gdev)
248{
249 return -EPERM;
250}
251
0ca8cc6f
UB		 252/* the root device for claw group devices */
253static struct device *claw_root_dev;
254
1da177e4
LT		 255/* ccwgroup table */
256
257static struct ccwgroup_driver claw_group_driver = {
3c190c51
SO		 258 .driver = {
259 .owner = THIS_MODULE,
260 .name = "claw",
261 },
2ced5514 262 .setup = claw_probe,
9814fdfb
SO		 263 .remove = claw_remove_device,
264 .set_online = claw_new_device,
265 .set_offline = claw_shutdown_device,
88efc2c5 266 .prepare = claw_pm_prepare,
1da177e4
LT		 267};
268
0ca8cc6f
UB		 269static struct ccw_device_id claw_ids[] = {
270 {CCW_DEVICE(0x3088, 0x61), .driver_info = claw_channel_type_claw},
271 {},
272};
273MODULE_DEVICE_TABLE(ccw, claw_ids);
274
275static struct ccw_driver claw_ccw_driver = {
3bda058b
SO		 276 .driver = {
277 .owner = THIS_MODULE,
278 .name = "claw",
279 },
0ca8cc6f
UB		 280 .ids = claw_ids,
281 .probe = ccwgroup_probe_ccwdev,
282 .remove = ccwgroup_remove_ccwdev,
420f42ec 283 .int_class = IRQIO_CLW,
0ca8cc6f
UB		 284};
285
2ced5514
SO		 286static ssize_t claw_driver_group_store(struct device_driver *ddrv,
287 const char *buf, size_t count)
0ca8cc6f
UB		 288{
289 int err;
9814fdfb 290 err = ccwgroup_create_dev(claw_root_dev, &claw_group_driver, 2, buf);
0ca8cc6f
UB		 291 return err ? err : count;
292}
0ca8cc6f
UB		 293static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store);
294
a43f8de6 295static struct attribute *claw_drv_attrs[] = {
0ca8cc6f
UB		 296 &driver_attr_group.attr,
297 NULL,
298};
a43f8de6
SO		 299static struct attribute_group claw_drv_attr_group = {
300 .attrs = claw_drv_attrs,
0ca8cc6f 301};
a43f8de6
SO		 302static const struct attribute_group *claw_drv_attr_groups[] = {
303 &claw_drv_attr_group,
0ca8cc6f
UB		 304 NULL,
305};
306
1da177e4 307/*
1da177e4
LT		 308* Key functions
309*/
310
1da177e4
LT		 311/*-------------------------------------------------------------------*
312 * claw_tx *
313 *-------------------------------------------------------------------*/
314
315static int
316claw_tx(struct sk_buff *skb, struct net_device *dev)
317{
318 int rc;
6951df34 319 struct claw_privbk *privptr = dev->ml_priv;
1da177e4
LT		 320 unsigned long saveflags;
321 struct chbk *p_ch;
322
b805da74 323 CLAW_DBF_TEXT(4, trace, "claw_tx");
319cb083 324 p_ch = &privptr->channel[WRITE_CHANNEL];
1da177e4
LT		 325 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
326 rc=claw_hw_tx( skb, dev, 1 );
327 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
b805da74 328 CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
8f0c40d4
UB		 329 if (rc)
330 rc = NETDEV_TX_BUSY;
ec634fe3
PM		 331 else
332 rc = NETDEV_TX_OK;
1da177e4
LT		 333 return rc;
334} /* end of claw_tx */
335
336/*------------------------------------------------------------------*
337 * pack the collect queue into an skb and return it *
338 * If not packing just return the top skb from the queue *
339 *------------------------------------------------------------------*/
340
341static struct sk_buff *
342claw_pack_skb(struct claw_privbk *privptr)
343{
344 struct sk_buff *new_skb,*held_skb;
319cb083 345 struct chbk *p_ch = &privptr->channel[WRITE_CHANNEL];
1da177e4
LT		 346 struct claw_env *p_env = privptr->p_env;
347 int pkt_cnt,pk_ind,so_far;
348
349 new_skb = NULL; /* assume no dice */
350 pkt_cnt = 0;
b805da74 351 CLAW_DBF_TEXT(4, trace, "PackSKBe");
b03efcfb 352 if (!skb_queue_empty(&p_ch->collect_queue)) {
1da177e4
LT		 353 /* some data */
354 held_skb = skb_dequeue(&p_ch->collect_queue);
1da177e4 355 if (held_skb)
8e84c801 356 dev_kfree_skb_any(held_skb);
1da177e4
LT		 357 else
358 return NULL;
8e84c801
FP		 359 if (p_env->packing != DO_PACKED)
360 return held_skb;
1da177e4
LT		 361 /* get a new SKB we will pack at least one */
362 new_skb = dev_alloc_skb(p_env->write_size);
363 if (new_skb == NULL) {
364 atomic_inc(&held_skb->users);
365 skb_queue_head(&p_ch->collect_queue,held_skb);
366 return NULL;
367 }
368 /* we have packed packet and a place to put it */
369 pk_ind = 1;
370 so_far = 0;
371 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
372 while ((pk_ind) && (held_skb != NULL)) {
373 if (held_skb->len+so_far <= p_env->write_size-8) {
374 memcpy(skb_put(new_skb,held_skb->len),
375 held_skb->data,held_skb->len);
376 privptr->stats.tx_packets++;
377 so_far += held_skb->len;
378 pkt_cnt++;
8e84c801 379 dev_kfree_skb_any(held_skb);
1da177e4
LT		 380 held_skb = skb_dequeue(&p_ch->collect_queue);
381 if (held_skb)
382 atomic_dec(&held_skb->users);
383 } else {
384 pk_ind = 0;
385 atomic_inc(&held_skb->users);
386 skb_queue_head(&p_ch->collect_queue,held_skb);
387 }
388 }
1da177e4 389 }
b805da74 390 CLAW_DBF_TEXT(4, trace, "PackSKBx");
1da177e4
LT		 391 return new_skb;
392}
393
394/*-------------------------------------------------------------------*
395 * claw_change_mtu *
396 * *
397 *-------------------------------------------------------------------*/
398
399static int
400claw_change_mtu(struct net_device *dev, int new_mtu)
401{
6951df34 402 struct claw_privbk *privptr = dev->ml_priv;
1da177e4 403 int buff_size;
b805da74 404 CLAW_DBF_TEXT(4, trace, "setmtu");
1da177e4
LT		 405 buff_size = privptr->p_env->write_size;
406 if ((new_mtu < 60) || (new_mtu > buff_size)) {
1da177e4
LT		 407 return -EINVAL;
408 }
409 dev->mtu = new_mtu;
1da177e4
LT		 410 return 0;
411} /* end of claw_change_mtu */
412
413
414/*-------------------------------------------------------------------*
415 * claw_open *
416 * *
417 *-------------------------------------------------------------------*/
418static int
419claw_open(struct net_device *dev)
420{
421
422 int rc;
423 int i;
424 unsigned long saveflags=0;
425 unsigned long parm;
426 struct claw_privbk *privptr;
427 DECLARE_WAITQUEUE(wait, current);
428 struct timer_list timer;
429 struct ccwbk *p_buf;
430
b805da74 431 CLAW_DBF_TEXT(4, trace, "open");
6951df34 432 privptr = (struct claw_privbk *)dev->ml_priv;
1da177e4
LT		 433 /* allocate and initialize CCW blocks */
434 if (privptr->buffs_alloc == 0) {
435 rc=init_ccw_bk(dev);
436 if (rc) {
b805da74 437 CLAW_DBF_TEXT(2, trace, "openmem");
1da177e4
LT		 438 return -ENOMEM;
439 }
440 }
441 privptr->system_validate_comp=0;
442 privptr->release_pend=0;
443 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
444 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
445 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
446 privptr->p_env->packing=PACKING_ASK;
447 } else {
448 privptr->p_env->packing=0;
449 privptr->p_env->read_size=CLAW_FRAME_SIZE;
450 privptr->p_env->write_size=CLAW_FRAME_SIZE;
451 }
452 claw_set_busy(dev);
319cb083
HC		 453 tasklet_init(&privptr->channel[READ_CHANNEL].tasklet, claw_irq_tasklet,
454 (unsigned long) &privptr->channel[READ_CHANNEL]);
1da177e4 455 for ( i = 0; i < 2; i++) {
b805da74 456 CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
1da177e4
LT		 457 init_waitqueue_head(&privptr->channel[i].wait);
458 /* skb_queue_head_init(&p_ch->io_queue); */
319cb083 459 if (i == WRITE_CHANNEL)
1da177e4 460 skb_queue_head_init(
319cb083 461 &privptr->channel[WRITE_CHANNEL].collect_queue);
1da177e4
LT		 462 privptr->channel[i].flag_a = 0;
463 privptr->channel[i].IO_active = 0;
464 privptr->channel[i].flag &= ~CLAW_TIMER;
465 init_timer(&timer);
466 timer.function = (void *)claw_timer;
467 timer.data = (unsigned long)(&privptr->channel[i]);
468 timer.expires = jiffies + 15*HZ;
469 add_timer(&timer);
470 spin_lock_irqsave(get_ccwdev_lock(
471 privptr->channel[i].cdev), saveflags);
472 parm = (unsigned long) &privptr->channel[i];
473 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
474 rc = 0;
475 add_wait_queue(&privptr->channel[i].wait, &wait);
476 rc = ccw_device_halt(
477 (struct ccw_device *)privptr->channel[i].cdev,parm);
478 set_current_state(TASK_INTERRUPTIBLE);
479 spin_unlock_irqrestore(
480 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
481 schedule();
1da177e4
LT		 482 remove_wait_queue(&privptr->channel[i].wait, &wait);
483 if(rc != 0)
484 ccw_check_return_code(privptr->channel[i].cdev, rc);
485 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
486 del_timer(&timer);
487 }
319cb083
HC		 488 if ((((privptr->channel[READ_CHANNEL].last_dstat |
489 privptr->channel[WRITE_CHANNEL].last_dstat) &
1da177e4 490 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
319cb083
HC		 491 (((privptr->channel[READ_CHANNEL].flag |
492 privptr->channel[WRITE_CHANNEL].flag) & CLAW_TIMER) != 0x00)) {
493 dev_info(&privptr->channel[READ_CHANNEL].cdev->dev,
4811fcb7 494 "%s: remote side is not ready\n", dev->name);
b805da74 495 CLAW_DBF_TEXT(2, trace, "notrdy");
1da177e4
LT		 496
497 for ( i = 0; i < 2; i++) {
498 spin_lock_irqsave(
499 get_ccwdev_lock(privptr->channel[i].cdev),
500 saveflags);
501 parm = (unsigned long) &privptr->channel[i];
502 privptr->channel[i].claw_state = CLAW_STOP;
503 rc = ccw_device_halt(
504 (struct ccw_device *)&privptr->channel[i].cdev,
505 parm);
506 spin_unlock_irqrestore(
507 get_ccwdev_lock(privptr->channel[i].cdev),
508 saveflags);
509 if (rc != 0) {
510 ccw_check_return_code(
511 privptr->channel[i].cdev, rc);
512 }
513 }
514 free_pages((unsigned long)privptr->p_buff_ccw,
515 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
516 if (privptr->p_env->read_size < PAGE_SIZE) {
517 free_pages((unsigned long)privptr->p_buff_read,
518 (int)pages_to_order_of_mag(
519 privptr->p_buff_read_num));
520 }
521 else {
522 p_buf=privptr->p_read_active_first;
523 while (p_buf!=NULL) {
524 free_pages((unsigned long)p_buf->p_buffer,
525 (int)pages_to_order_of_mag(
526 privptr->p_buff_pages_perread ));
527 p_buf=p_buf->next;
528 }
529 }
530 if (privptr->p_env->write_size < PAGE_SIZE ) {
531 free_pages((unsigned long)privptr->p_buff_write,
532 (int)pages_to_order_of_mag(
533 privptr->p_buff_write_num));
534 }
535 else {
536 p_buf=privptr->p_write_active_first;
537 while (p_buf!=NULL) {
538 free_pages((unsigned long)p_buf->p_buffer,
539 (int)pages_to_order_of_mag(
540 privptr->p_buff_pages_perwrite ));
541 p_buf=p_buf->next;
542 }
543 }
544 privptr->buffs_alloc = 0;
319cb083
HC		 545 privptr->channel[READ_CHANNEL].flag = 0x00;
546 privptr->channel[WRITE_CHANNEL].flag = 0x00;
1da177e4
LT		 547 privptr->p_buff_ccw=NULL;
548 privptr->p_buff_read=NULL;
549 privptr->p_buff_write=NULL;
550 claw_clear_busy(dev);
b805da74 551 CLAW_DBF_TEXT(2, trace, "open EIO");
1da177e4
LT		 552 return -EIO;
553 }
554
555 /* Send SystemValidate command */
556
557 claw_clear_busy(dev);
b805da74 558 CLAW_DBF_TEXT(4, trace, "openok");
1da177e4
LT		 559 return 0;
560} /* end of claw_open */
561
562/*-------------------------------------------------------------------*
563* *
564* claw_irq_handler *
565* *
566*--------------------------------------------------------------------*/
567static void
568claw_irq_handler(struct ccw_device *cdev,
569 unsigned long intparm, struct irb *irb)
570{
571 struct chbk *p_ch = NULL;
572 struct claw_privbk *privptr = NULL;
573 struct net_device *dev = NULL;
574 struct claw_env *p_env;
575 struct chbk *p_ch_r=NULL;
576
b805da74 577 CLAW_DBF_TEXT(4, trace, "clawirq");
1da177e4 578 /* Bypass all 'unsolicited interrupts' */
dff59b64
GKH		 579 privptr = dev_get_drvdata(&cdev->dev);
580 if (!privptr) {
4811fcb7
AR		 581 dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
582 " IRQ, c-%02x d-%02x\n",
583 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
b805da74 584 CLAW_DBF_TEXT(2, trace, "badirq");
1da177e4
LT		 585 return;
586 }
1da177e4
LT		 587
588 /* Try to extract channel from driver data. */
319cb083
HC		 589 if (privptr->channel[READ_CHANNEL].cdev == cdev)
590 p_ch = &privptr->channel[READ_CHANNEL];
591 else if (privptr->channel[WRITE_CHANNEL].cdev == cdev)
592 p_ch = &privptr->channel[WRITE_CHANNEL];
1da177e4 593 else {
4811fcb7 594 dev_warn(&cdev->dev, "The device is not a CLAW device\n");
b805da74 595 CLAW_DBF_TEXT(2, trace, "badchan");
1da177e4
LT		 596 return;
597 }
b805da74 598 CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
1da177e4
LT		 599
600 dev = (struct net_device *) (p_ch->ndev);
601 p_env=privptr->p_env;
602
1da177e4
LT		 603 /* Copy interruption response block. */
604 memcpy(p_ch->irb, irb, sizeof(struct irb));
605
b805da74 606 /* Check for good subchannel return code, otherwise info message */
23d805b6 607 if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
4811fcb7
AR		 608 dev_info(&cdev->dev,
609 "%s: subchannel check for device: %04x -"
1da177e4
LT		 610 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
611 dev->name, p_ch->devno,
23d805b6
PO		 612 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
613 irb->scsw.cmd.cpa);
b805da74 614 CLAW_DBF_TEXT(2, trace, "chanchk");
1da177e4
LT		 615 /* return; */
616 }
617
618 /* Check the reason-code of a unit check */
23d805b6 619 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
1da177e4 620 ccw_check_unit_check(p_ch, irb->ecw[0]);
1da177e4
LT		 621
622 /* State machine to bring the connection up, down and to restart */
23d805b6 623 p_ch->last_dstat = irb->scsw.cmd.dstat;
1da177e4
LT		 624
625 switch (p_ch->claw_state) {
b805da74
AR		 626 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
627 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
628 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
629 (p_ch->irb->scsw.cmd.stctl ==
630 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
631 return;
632 wake_up(&p_ch->wait); /* wake up claw_release */
633 CLAW_DBF_TEXT(4, trace, "stop");
634 return;
635 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
636 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
637 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
638 (p_ch->irb->scsw.cmd.stctl ==
639 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
640 CLAW_DBF_TEXT(4, trace, "haltio");
641 return;
642 }
643 if (p_ch->flag == CLAW_READ) {
644 p_ch->claw_state = CLAW_START_READ;
645 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
646 } else if (p_ch->flag == CLAW_WRITE) {
647 p_ch->claw_state = CLAW_START_WRITE;
4811fcb7 648 /* send SYSTEM_VALIDATE */
b805da74
AR		 649 claw_strt_read(dev, LOCK_NO);
650 claw_send_control(dev,
651 SYSTEM_VALIDATE_REQUEST,
652 0, 0, 0,
653 p_env->host_name,
654 p_env->adapter_name);
655 } else {
4811fcb7
AR		 656 dev_warn(&cdev->dev, "The CLAW device received"
657 " an unexpected IRQ, "
658 "c-%02x d-%02x\n",
b805da74
AR		 659 irb->scsw.cmd.cstat,
660 irb->scsw.cmd.dstat);
661 return;
662 }
663 CLAW_DBF_TEXT(4, trace, "haltio");
664 return;
665 case CLAW_START_READ:
666 CLAW_DBF_TEXT(4, trace, "ReadIRQ");
667 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
668 clear_bit(0, (void *)&p_ch->IO_active);
669 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
670 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
671 (p_ch->irb->ecw[0]) == 0) {
672 privptr->stats.rx_errors++;
4811fcb7
AR		 673 dev_info(&cdev->dev,
674 "%s: Restart is required after remote "
b805da74
AR		 675 "side recovers \n",
676 dev->name);
677 }
678 CLAW_DBF_TEXT(4, trace, "notrdy");
679 return;
680 }
681 if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
682 (p_ch->irb->scsw.cmd.dstat == 0)) {
683 if (test_and_set_bit(CLAW_BH_ACTIVE,
684 (void *)&p_ch->flag_a) == 0)
685 tasklet_schedule(&p_ch->tasklet);
1da177e4 686 else
b805da74
AR		 687 CLAW_DBF_TEXT(4, trace, "PCINoBH");
688 CLAW_DBF_TEXT(4, trace, "PCI_read");
689 return;
690 }
691 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
692 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
693 (p_ch->irb->scsw.cmd.stctl ==
694 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
695 CLAW_DBF_TEXT(4, trace, "SPend_rd");
696 return;
697 }
698 clear_bit(0, (void *)&p_ch->IO_active);
699 claw_clearbit_busy(TB_RETRY, dev);
700 if (test_and_set_bit(CLAW_BH_ACTIVE,
701 (void *)&p_ch->flag_a) == 0)
702 tasklet_schedule(&p_ch->tasklet);
703 else
704 CLAW_DBF_TEXT(4, trace, "RdBHAct");
705 CLAW_DBF_TEXT(4, trace, "RdIRQXit");
706 return;
707 case CLAW_START_WRITE:
708 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
4811fcb7 709 dev_info(&cdev->dev,
25985edc 710 "%s: Unit Check Occurred in "
b805da74
AR		 711 "write channel\n", dev->name);
712 clear_bit(0, (void *)&p_ch->IO_active);
713 if (p_ch->irb->ecw[0] & 0x80) {
4811fcb7
AR		 714 dev_info(&cdev->dev,
715 "%s: Resetting Event "
b805da74
AR		 716 "occurred:\n", dev->name);
717 init_timer(&p_ch->timer);
718 p_ch->timer.function =
719 (void *)claw_write_retry;
720 p_ch->timer.data = (unsigned long)p_ch;
721 p_ch->timer.expires = jiffies + 10*HZ;
722 add_timer(&p_ch->timer);
4811fcb7
AR		 723 dev_info(&cdev->dev,
724 "%s: write connection "
b805da74
AR		 725 "restarting\n", dev->name);
726 }
727 CLAW_DBF_TEXT(4, trace, "rstrtwrt");
728 return;
729 }
730 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
731 clear_bit(0, (void *)&p_ch->IO_active);
4811fcb7
AR		 732 dev_info(&cdev->dev,
733 "%s: Unit Exception "
734 "occurred in write channel\n",
735 dev->name);
b805da74
AR		 736 }
737 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
738 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
739 (p_ch->irb->scsw.cmd.stctl ==
740 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
741 CLAW_DBF_TEXT(4, trace, "writeUE");
742 return;
743 }
744 clear_bit(0, (void *)&p_ch->IO_active);
745 if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
746 claw_write_next(p_ch);
747 claw_clearbit_busy(TB_TX, dev);
748 claw_clear_busy(dev);
749 }
319cb083 750 p_ch_r = (struct chbk *)&privptr->channel[READ_CHANNEL];
b805da74
AR		 751 if (test_and_set_bit(CLAW_BH_ACTIVE,
752 (void *)&p_ch_r->flag_a) == 0)
753 tasklet_schedule(&p_ch_r->tasklet);
754 CLAW_DBF_TEXT(4, trace, "StWtExit");
755 return;
756 default:
4811fcb7
AR		 757 dev_warn(&cdev->dev,
758 "The CLAW device for %s received an unexpected IRQ\n",
759 dev->name);
b805da74
AR		 760 CLAW_DBF_TEXT(2, trace, "badIRQ");
761 return;
1da177e4
LT		 762 }
763
764} /* end of claw_irq_handler */
765
766
767/*-------------------------------------------------------------------*
768* claw_irq_tasklet *
769* *
770*--------------------------------------------------------------------*/
771static void
772claw_irq_tasklet ( unsigned long data )
773{
774 struct chbk * p_ch;
775 struct net_device *dev;
1da177e4
LT		 776
777 p_ch = (struct chbk *) data;
778 dev = (struct net_device *)p_ch->ndev;
b805da74 779 CLAW_DBF_TEXT(4, trace, "IRQtask");
1da177e4
LT		 780 unpack_read(dev);
781 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
b805da74 782 CLAW_DBF_TEXT(4, trace, "TskletXt");
1da177e4
LT		 783 return;
784} /* end of claw_irq_bh */
785
786/*-------------------------------------------------------------------*
787* claw_release *
788* *
789*--------------------------------------------------------------------*/
790static int
791claw_release(struct net_device *dev)
792{
793 int rc;
794 int i;
795 unsigned long saveflags;
796 unsigned long parm;
797 struct claw_privbk *privptr;
798 DECLARE_WAITQUEUE(wait, current);
799 struct ccwbk* p_this_ccw;
800 struct ccwbk* p_buf;
801
802 if (!dev)
803 return 0;
6951df34 804 privptr = (struct claw_privbk *)dev->ml_priv;
1da177e4
LT		 805 if (!privptr)
806 return 0;
b805da74 807 CLAW_DBF_TEXT(4, trace, "release");
1da177e4
LT		 808 privptr->release_pend=1;
809 claw_setbit_busy(TB_STOP,dev);
810 for ( i = 1; i >=0 ; i--) {
811 spin_lock_irqsave(
812 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
319cb083 813 /* del_timer(&privptr->channel[READ_CHANNEL].timer); */
1da177e4
LT		 814 privptr->channel[i].claw_state = CLAW_STOP;
815 privptr->channel[i].IO_active = 0;
816 parm = (unsigned long) &privptr->channel[i];
319cb083 817 if (i == WRITE_CHANNEL)
1da177e4 818 claw_purge_skb_queue(
319cb083 819 &privptr->channel[WRITE_CHANNEL].collect_queue);
1da177e4
LT		 820 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
821 if (privptr->system_validate_comp==0x00) /* never opened? */
822 init_waitqueue_head(&privptr->channel[i].wait);
823 add_wait_queue(&privptr->channel[i].wait, &wait);
824 set_current_state(TASK_INTERRUPTIBLE);
825 spin_unlock_irqrestore(
826 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
827 schedule();
1da177e4
LT		 828 remove_wait_queue(&privptr->channel[i].wait, &wait);
829 if (rc != 0) {
830 ccw_check_return_code(privptr->channel[i].cdev, rc);
831 }
832 }
833 if (privptr->pk_skb != NULL) {
8e84c801 834 dev_kfree_skb_any(privptr->pk_skb);
1da177e4
LT		 835 privptr->pk_skb = NULL;
836 }
837 if(privptr->buffs_alloc != 1) {
b805da74 838 CLAW_DBF_TEXT(4, trace, "none2fre");
1da177e4
LT		 839 return 0;
840 }
b805da74 841 CLAW_DBF_TEXT(4, trace, "freebufs");
1da177e4
LT		 842 if (privptr->p_buff_ccw != NULL) {
843 free_pages((unsigned long)privptr->p_buff_ccw,
844 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
845 }
b805da74 846 CLAW_DBF_TEXT(4, trace, "freeread");
1da177e4
LT		 847 if (privptr->p_env->read_size < PAGE_SIZE) {
848 if (privptr->p_buff_read != NULL) {
849 free_pages((unsigned long)privptr->p_buff_read,
850 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
851 }
852 }
853 else {
854 p_buf=privptr->p_read_active_first;
855 while (p_buf!=NULL) {
856 free_pages((unsigned long)p_buf->p_buffer,
857 (int)pages_to_order_of_mag(
858 privptr->p_buff_pages_perread ));
859 p_buf=p_buf->next;
860 }
861 }
b805da74 862 CLAW_DBF_TEXT(4, trace, "freewrit");
1da177e4
LT		 863 if (privptr->p_env->write_size < PAGE_SIZE ) {
864 free_pages((unsigned long)privptr->p_buff_write,
865 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
866 }
867 else {
868 p_buf=privptr->p_write_active_first;
869 while (p_buf!=NULL) {
870 free_pages((unsigned long)p_buf->p_buffer,
871 (int)pages_to_order_of_mag(
872 privptr->p_buff_pages_perwrite ));
873 p_buf=p_buf->next;
874 }
875 }
b805da74 876 CLAW_DBF_TEXT(4, trace, "clearptr");
1da177e4
LT		 877 privptr->buffs_alloc = 0;
878 privptr->p_buff_ccw=NULL;
879 privptr->p_buff_read=NULL;
880 privptr->p_buff_write=NULL;
881 privptr->system_validate_comp=0;
882 privptr->release_pend=0;
883 /* Remove any writes that were pending and reset all reads */
884 p_this_ccw=privptr->p_read_active_first;
885 while (p_this_ccw!=NULL) {
886 p_this_ccw->header.length=0xffff;
887 p_this_ccw->header.opcode=0xff;
888 p_this_ccw->header.flag=0x00;
889 p_this_ccw=p_this_ccw->next;
890 }
891
892 while (privptr->p_write_active_first!=NULL) {
893 p_this_ccw=privptr->p_write_active_first;
894 p_this_ccw->header.flag=CLAW_PENDING;
895 privptr->p_write_active_first=p_this_ccw->next;
896 p_this_ccw->next=privptr->p_write_free_chain;
897 privptr->p_write_free_chain=p_this_ccw;
898 ++privptr->write_free_count;
899 }
900 privptr->p_write_active_last=NULL;
901 privptr->mtc_logical_link = -1;
902 privptr->mtc_skipping = 1;
903 privptr->mtc_offset=0;
904
319cb083
HC		 905 if (((privptr->channel[READ_CHANNEL].last_dstat |
906 privptr->channel[WRITE_CHANNEL].last_dstat) &
1da177e4 907 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
319cb083 908 dev_warn(&privptr->channel[READ_CHANNEL].cdev->dev,
4811fcb7
AR		 909 "Deactivating %s completed with incorrect"
910 " subchannel status "
911 "(read %02x, write %02x)\n",
1da177e4 912 dev->name,
319cb083
HC		 913 privptr->channel[READ_CHANNEL].last_dstat,
914 privptr->channel[WRITE_CHANNEL].last_dstat);
b805da74 915 CLAW_DBF_TEXT(2, trace, "badclose");
1da177e4 916 }
b805da74 917 CLAW_DBF_TEXT(4, trace, "rlsexit");
1da177e4
LT		 918 return 0;
919} /* end of claw_release */
920
1da177e4
LT		 921/*-------------------------------------------------------------------*
922* claw_write_retry *
923* *
924*--------------------------------------------------------------------*/
925
926static void
927claw_write_retry ( struct chbk *p_ch )
928{
929
930 struct net_device *dev=p_ch->ndev;
931
b805da74 932 CLAW_DBF_TEXT(4, trace, "w_retry");
1da177e4 933 if (p_ch->claw_state == CLAW_STOP) {
1da177e4
LT		 934 return;
935 }
1da177e4 936 claw_strt_out_IO( dev );
b805da74 937 CLAW_DBF_TEXT(4, trace, "rtry_xit");
1da177e4
LT		 938 return;
939} /* end of claw_write_retry */
940
941
942/*-------------------------------------------------------------------*
943* claw_write_next *
944* *
945*--------------------------------------------------------------------*/
946
947static void
948claw_write_next ( struct chbk * p_ch )
949{
950
951 struct net_device *dev;
952 struct claw_privbk *privptr=NULL;
953 struct sk_buff *pk_skb;
1da177e4 954
b805da74 955 CLAW_DBF_TEXT(4, trace, "claw_wrt");
1da177e4
LT		 956 if (p_ch->claw_state == CLAW_STOP)
957 return;
958 dev = (struct net_device *) p_ch->ndev;
6951df34 959 privptr = (struct claw_privbk *) dev->ml_priv;
1da177e4
LT		 960 claw_free_wrt_buf( dev );
961 if ((privptr->write_free_count > 0) &&
b03efcfb 962 !skb_queue_empty(&p_ch->collect_queue)) {
1da177e4
LT		 963 pk_skb = claw_pack_skb(privptr);
964 while (pk_skb != NULL) {
38ed18ff 965 claw_hw_tx(pk_skb, dev, 1);
1da177e4
LT		 966 if (privptr->write_free_count > 0) {
967 pk_skb = claw_pack_skb(privptr);
968 } else
969 pk_skb = NULL;
970 }
971 }
972 if (privptr->p_write_active_first!=NULL) {
973 claw_strt_out_IO(dev);
974 }
1da177e4
LT		 975 return;
976} /* end of claw_write_next */
977
978/*-------------------------------------------------------------------*
979* *
980* claw_timer *
981*--------------------------------------------------------------------*/
982
983static void
984claw_timer ( struct chbk * p_ch )
985{
b805da74 986 CLAW_DBF_TEXT(4, trace, "timer");
1da177e4
LT		 987 p_ch->flag |= CLAW_TIMER;
988 wake_up(&p_ch->wait);
1da177e4
LT		 989 return;
990} /* end of claw_timer */
991
1da177e4
LT		 992/*
993*
994* functions
995*/
996
997
998/*-------------------------------------------------------------------*
999* *
1000* pages_to_order_of_mag *
1001* *
1002* takes a number of pages from 1 to 512 and returns the *
1003* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1004* of magnitude get_free_pages() has an upper order of 9 *
1005*--------------------------------------------------------------------*/
1006
4d284cac 1007static int
1da177e4
LT		 1008pages_to_order_of_mag(int num_of_pages)
1009{
1010 int order_of_mag=1; /* assume 2 pages */
b9d2fcee 1011 int nump;
b805da74
AR		 1012
1013 CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
1da177e4
LT		 1014 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1015 /* 512 pages = 2Meg on 4k page systems */
1016 if (num_of_pages >= 512) {return 9; }
1017 /* we have two or more pages order is at least 1 */
1018 for (nump=2 ;nump <= 512;nump*=2) {
1019 if (num_of_pages <= nump)
1020 break;
1021 order_of_mag +=1;
1022 }
1023 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
b805da74 1024 CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1da177e4
LT		 1025 return order_of_mag;
1026}
1027
1028/*-------------------------------------------------------------------*
1029* *
1030* add_claw_reads *
1031* *
1032*--------------------------------------------------------------------*/
1033static int
1034add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1035 struct ccwbk* p_last)
1036{
1037 struct claw_privbk *privptr;
1038 struct ccw1 temp_ccw;
1039 struct endccw * p_end;
b805da74 1040 CLAW_DBF_TEXT(4, trace, "addreads");
6951df34 1041 privptr = dev->ml_priv;
1da177e4
LT		 1042 p_end = privptr->p_end_ccw;
1043
1044 /* first CCW and last CCW contains a new set of read channel programs
1045 * to apend the running channel programs
1046 */
1047 if ( p_first==NULL) {
b805da74 1048 CLAW_DBF_TEXT(4, trace, "addexit");
1da177e4
LT		 1049 return 0;
1050 }
1051
1052 /* set up ending CCW sequence for this segment */
1053 if (p_end->read1) {
1054 p_end->read1=0x00; /* second ending CCW is now active */
1055 /* reset ending CCWs and setup TIC CCWs */
1056 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1057 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1058 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1059 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1060 p_end->read2_nop2.cda=0;
1061 p_end->read2_nop2.count=1;
1062 }
1063 else {
1064 p_end->read1=0x01; /* first ending CCW is now active */
1065 /* reset ending CCWs and setup TIC CCWs */
1066 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1067 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1068 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1069 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1070 p_end->read1_nop2.cda=0;
1071 p_end->read1_nop2.count=1;
1072 }
1073
1074 if ( privptr-> p_read_active_first ==NULL ) {
4811fcb7
AR		 1075 privptr->p_read_active_first = p_first; /* set new first */
1076 privptr->p_read_active_last = p_last; /* set new last */
1da177e4
LT		 1077 }
1078 else {
1079
1da177e4
LT		 1080 /* set up TIC ccw */
1081 temp_ccw.cda= (__u32)__pa(&p_first->read);
1082 temp_ccw.count=0;
1083 temp_ccw.flags=0;
1084 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1085
1086
1087 if (p_end->read1) {
1088
1089 /* first set of CCW's is chained to the new read */
1090 /* chain, so the second set is chained to the active chain. */
1091 /* Therefore modify the second set to point to the new */
1092 /* read chain set up TIC CCWs */
1093 /* make sure we update the CCW so channel doesn't fetch it */
1094 /* when it's only half done */
1095 memcpy( &p_end->read2_nop2, &temp_ccw ,
1096 sizeof(struct ccw1));
1097 privptr->p_read_active_last->r_TIC_1.cda=
1098 (__u32)__pa(&p_first->read);
1099 privptr->p_read_active_last->r_TIC_2.cda=
1100 (__u32)__pa(&p_first->read);
1101 }
1102 else {
1103 /* make sure we update the CCW so channel doesn't */
1104 /* fetch it when it is only half done */
1105 memcpy( &p_end->read1_nop2, &temp_ccw ,
1106 sizeof(struct ccw1));
1107 privptr->p_read_active_last->r_TIC_1.cda=
1108 (__u32)__pa(&p_first->read);
1109 privptr->p_read_active_last->r_TIC_2.cda=
1110 (__u32)__pa(&p_first->read);
1111 }
4811fcb7 1112 /* chain in new set of blocks */
1da177e4
LT		 1113 privptr->p_read_active_last->next = p_first;
1114 privptr->p_read_active_last=p_last;
1115 } /* end of if ( privptr-> p_read_active_first ==NULL) */
b805da74 1116 CLAW_DBF_TEXT(4, trace, "addexit");
1da177e4
LT		 1117 return 0;
1118} /* end of add_claw_reads */
1119
1120/*-------------------------------------------------------------------*
1121 * ccw_check_return_code *
1122 * *
1123 *-------------------------------------------------------------------*/
1124
4d284cac 1125static void
1da177e4
LT		 1126ccw_check_return_code(struct ccw_device *cdev, int return_code)
1127{
b805da74 1128 CLAW_DBF_TEXT(4, trace, "ccwret");
1da177e4
LT		 1129 if (return_code != 0) {
1130 switch (return_code) {
b805da74
AR		 1131 case -EBUSY: /* BUSY is a transient state no action needed */
1132 break;
1133 case -ENODEV:
4811fcb7
AR		 1134 dev_err(&cdev->dev, "The remote channel adapter is not"
1135 " available\n");
b805da74
AR		 1136 break;
1137 case -EINVAL:
4811fcb7
AR		 1138 dev_err(&cdev->dev,
1139 "The status of the remote channel adapter"
1140 " is not valid\n");
b805da74
AR		 1141 break;
1142 default:
4811fcb7
AR		 1143 dev_err(&cdev->dev, "The common device layer"
1144 " returned error code %d\n",
1145 return_code);
b805da74
AR		 1146 }
1147 }
1148 CLAW_DBF_TEXT(4, trace, "ccwret");
1da177e4
LT		 1149} /* end of ccw_check_return_code */
1150
1151/*-------------------------------------------------------------------*
1152* ccw_check_unit_check *
1153*--------------------------------------------------------------------*/
1154
4d284cac 1155static void
1da177e4
LT		 1156ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1157{
b805da74 1158 struct net_device *ndev = p_ch->ndev;
4811fcb7 1159 struct device *dev = &p_ch->cdev->dev;
1da177e4 1160
b805da74 1161 CLAW_DBF_TEXT(4, trace, "unitchek");
4811fcb7
AR		 1162 dev_warn(dev, "The communication peer of %s disconnected\n",
1163 ndev->name);
1da177e4 1164
b9d2fcee
AR		 1165 if (sense & 0x40) {
1166 if (sense & 0x01) {
4811fcb7
AR		 1167 dev_warn(dev, "The remote channel adapter for"
1168 " %s has been reset\n",
1169 ndev->name);
b9d2fcee
AR		 1170 }
1171 } else if (sense & 0x20) {
1172 if (sense & 0x04) {
4811fcb7
AR		 1173 dev_warn(dev, "A data streaming timeout occurred"
1174 " for %s\n",
1175 ndev->name);
b9d2fcee 1176 } else if (sense & 0x10) {
4811fcb7
AR		 1177 dev_warn(dev, "The remote channel adapter for %s"
1178 " is faulty\n",
1179 ndev->name);
b9d2fcee
AR		 1180 } else {
1181 dev_warn(dev, "A data transfer parity error occurred"
4811fcb7
AR		 1182 " for %s\n",
1183 ndev->name);
b9d2fcee
AR		 1184 }
1185 } else if (sense & 0x10) {
1186 dev_warn(dev, "A read data parity error occurred"
1187 " for %s\n",
1188 ndev->name);
1189 }
1da177e4 1190
1da177e4
LT		 1191} /* end of ccw_check_unit_check */
1192
1da177e4
LT		 1193/*-------------------------------------------------------------------*
1194* find_link *
1195*--------------------------------------------------------------------*/
1196static int
1197find_link(struct net_device *dev, char *host_name, char *ws_name )
1198{
1199 struct claw_privbk *privptr;
1200 struct claw_env *p_env;
1201 int rc=0;
1202
b805da74 1203 CLAW_DBF_TEXT(2, setup, "findlink");
6951df34 1204 privptr = dev->ml_priv;
1da177e4
LT		 1205 p_env=privptr->p_env;
1206 switch (p_env->packing)
1207 {
1208 case PACKING_ASK:
1209 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1210 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1211 rc = EINVAL;
1212 break;
1213 case DO_PACKED:
1214 case PACK_SEND:
1215 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1216 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1217 rc = EINVAL;
1218 break;
1219 default:
1220 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1221 (memcmp(p_env->api_type , ws_name, 8)!=0))
1222 rc = EINVAL;
1223 break;
1224 }
1225
b9d2fcee 1226 return rc;
1da177e4
LT		 1227} /* end of find_link */
1228
1229/*-------------------------------------------------------------------*
1230 * claw_hw_tx *
1231 * *
1232 * *
1233 *-------------------------------------------------------------------*/
1234
1235static int
1236claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1237{
1238 int rc=0;
1239 struct claw_privbk *privptr;
1240 struct ccwbk *p_this_ccw;
1241 struct ccwbk *p_first_ccw;
1242 struct ccwbk *p_last_ccw;
1243 __u32 numBuffers;
1244 signed long len_of_data;
1245 unsigned long bytesInThisBuffer;
1246 unsigned char *pDataAddress;
1247 struct endccw *pEnd;
1248 struct ccw1 tempCCW;
1da177e4 1249 struct claw_env *p_env;
1da177e4
LT		 1250 struct clawph *pk_head;
1251 struct chbk *ch;
b805da74
AR		 1252
1253 CLAW_DBF_TEXT(4, trace, "hw_tx");
6951df34 1254 privptr = (struct claw_privbk *)(dev->ml_priv);
1da177e4 1255 p_env =privptr->p_env;
1da177e4
LT		 1256 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1257 /* scan the write queue to free any completed write packets */
1258 p_first_ccw=NULL;
1259 p_last_ccw=NULL;
1260 if ((p_env->packing >= PACK_SEND) &&
1261 (skb->cb[1] != 'P')) {
1262 skb_push(skb,sizeof(struct clawph));
1263 pk_head=(struct clawph *)skb->data;
1264 pk_head->len=skb->len-sizeof(struct clawph);
1265 if (pk_head->len%4) {
1266 pk_head->len+= 4-(pk_head->len%4);
1267 skb_pad(skb,4-(pk_head->len%4));
1268 skb_put(skb,4-(pk_head->len%4));
1269 }
1270 if (p_env->packing == DO_PACKED)
1271 pk_head->link_num = linkid;
1272 else
1273 pk_head->link_num = 0;
1274 pk_head->flag = 0x00;
1275 skb_pad(skb,4);
1276 skb->cb[1] = 'P';
1277 }
1278 if (linkid == 0) {
1279 if (claw_check_busy(dev)) {
1280 if (privptr->write_free_count!=0) {
1281 claw_clear_busy(dev);
1282 }
1283 else {
1284 claw_strt_out_IO(dev );
1285 claw_free_wrt_buf( dev );
1286 if (privptr->write_free_count==0) {
319cb083 1287 ch = &privptr->channel[WRITE_CHANNEL];
1da177e4
LT		 1288 atomic_inc(&skb->users);
1289 skb_queue_tail(&ch->collect_queue, skb);
1290 goto Done;
1291 }
1292 else {
1293 claw_clear_busy(dev);
1294 }
1295 }
1296 }
1297 /* tx lock */
1298 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
319cb083 1299 ch = &privptr->channel[WRITE_CHANNEL];
1da177e4
LT		 1300 atomic_inc(&skb->users);
1301 skb_queue_tail(&ch->collect_queue, skb);
1302 claw_strt_out_IO(dev );
1303 rc=-EBUSY;
1304 goto Done2;
1305 }
1306 }
1307 /* See how many write buffers are required to hold this data */
f5154fbf 1308 numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1da177e4
LT		 1309
1310 /* If that number of buffers isn't available, give up for now */
1311 if (privptr->write_free_count < numBuffers ||
1312 privptr->p_write_free_chain == NULL ) {
1313
1314 claw_setbit_busy(TB_NOBUFFER,dev);
319cb083 1315 ch = &privptr->channel[WRITE_CHANNEL];
1da177e4
LT		 1316 atomic_inc(&skb->users);
1317 skb_queue_tail(&ch->collect_queue, skb);
b805da74 1318 CLAW_DBF_TEXT(2, trace, "clawbusy");
1da177e4
LT		 1319 goto Done2;
1320 }
1321 pDataAddress=skb->data;
1322 len_of_data=skb->len;
1323
1324 while (len_of_data > 0) {
1da177e4
LT		 1325 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1326 if (p_this_ccw == NULL) { /* lost the race */
319cb083 1327 ch = &privptr->channel[WRITE_CHANNEL];
1da177e4
LT		 1328 atomic_inc(&skb->users);
1329 skb_queue_tail(&ch->collect_queue, skb);
1330 goto Done2;
1331 }
1332 privptr->p_write_free_chain=p_this_ccw->next;
1333 p_this_ccw->next=NULL;
1334 --privptr->write_free_count; /* -1 */
b9d2fcee
AR		 1335 if (len_of_data >= privptr->p_env->write_size)
1336 bytesInThisBuffer = privptr->p_env->write_size;
1337 else
1338 bytesInThisBuffer = len_of_data;
1da177e4
LT		 1339 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1340 len_of_data-=bytesInThisBuffer;
1341 pDataAddress+=(unsigned long)bytesInThisBuffer;
1342 /* setup write CCW */
1343 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1344 if (len_of_data>0) {
1345 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1346 }
1347 p_this_ccw->write.count=bytesInThisBuffer;
1348 /* now add to end of this chain */
1349 if (p_first_ccw==NULL) {
1350 p_first_ccw=p_this_ccw;
1351 }
1352 if (p_last_ccw!=NULL) {
1353 p_last_ccw->next=p_this_ccw;
1354 /* set up TIC ccws */
1355 p_last_ccw->w_TIC_1.cda=
1356 (__u32)__pa(&p_this_ccw->write);
1357 }
1358 p_last_ccw=p_this_ccw; /* save new last block */
1da177e4
LT		 1359 }
1360
1361 /* FirstCCW and LastCCW now contain a new set of write channel
1362 * programs to append to the running channel program
1363 */
1364
1365 if (p_first_ccw!=NULL) {
4811fcb7 1366 /* setup ending ccw sequence for this segment */
1da177e4
LT		 1367 pEnd=privptr->p_end_ccw;
1368 if (pEnd->write1) {
1369 pEnd->write1=0x00; /* second end ccw is now active */
1370 /* set up Tic CCWs */
1371 p_last_ccw->w_TIC_1.cda=
1372 (__u32)__pa(&pEnd->write2_nop1);
1373 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1374 pEnd->write2_nop2.flags =
1375 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1376 pEnd->write2_nop2.cda=0;
1377 pEnd->write2_nop2.count=1;
1378 }
1379 else { /* end of if (pEnd->write1)*/
1380 pEnd->write1=0x01; /* first end ccw is now active */
1381 /* set up Tic CCWs */
1382 p_last_ccw->w_TIC_1.cda=
1383 (__u32)__pa(&pEnd->write1_nop1);
1384 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1385 pEnd->write1_nop2.flags =
1386 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1387 pEnd->write1_nop2.cda=0;
1388 pEnd->write1_nop2.count=1;
1389 } /* end if if (pEnd->write1) */
1390
1da177e4
LT		 1391 if (privptr->p_write_active_first==NULL ) {
1392 privptr->p_write_active_first=p_first_ccw;
1393 privptr->p_write_active_last=p_last_ccw;
1394 }
1395 else {
1da177e4
LT		 1396 /* set up Tic CCWs */
1397
1398 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1399 tempCCW.count=0;
1400 tempCCW.flags=0;
1401 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1402
1403 if (pEnd->write1) {
1404
1405 /*
1406 * first set of ending CCW's is chained to the new write
1407 * chain, so the second set is chained to the active chain
1408 * Therefore modify the second set to point the new write chain.
1409 * make sure we update the CCW atomically
1410 * so channel does not fetch it when it's only half done
1411 */
1412 memcpy( &pEnd->write2_nop2, &tempCCW ,
1413 sizeof(struct ccw1));
1414 privptr->p_write_active_last->w_TIC_1.cda=
1415 (__u32)__pa(&p_first_ccw->write);
1416 }
1417 else {
1418
1419 /*make sure we update the CCW atomically
1420 *so channel does not fetch it when it's only half done
1421 */
1422 memcpy(&pEnd->write1_nop2, &tempCCW ,
1423 sizeof(struct ccw1));
1424 privptr->p_write_active_last->w_TIC_1.cda=
1425 (__u32)__pa(&p_first_ccw->write);
1426
1427 } /* end if if (pEnd->write1) */
1428
1429 privptr->p_write_active_last->next=p_first_ccw;
1430 privptr->p_write_active_last=p_last_ccw;
1431 }
1432
1433 } /* endif (p_first_ccw!=NULL) */
8e84c801 1434 dev_kfree_skb_any(skb);
1da177e4
LT		 1435 claw_strt_out_IO(dev );
1436 /* if write free count is zero , set NOBUFFER */
1da177e4
LT		 1437 if (privptr->write_free_count==0) {
1438 claw_setbit_busy(TB_NOBUFFER,dev);
1439 }
1440Done2:
1441 claw_clearbit_busy(TB_TX,dev);
1442Done:
1da177e4
LT		 1443 return(rc);
1444} /* end of claw_hw_tx */
1445
1446/*-------------------------------------------------------------------*
1447* *
1448* init_ccw_bk *
1449* *
1450*--------------------------------------------------------------------*/
1451
1452static int
1453init_ccw_bk(struct net_device *dev)
1454{
1455
1456 __u32 ccw_blocks_required;
1457 __u32 ccw_blocks_perpage;
1458 __u32 ccw_pages_required;
1459 __u32 claw_reads_perpage=1;
1460 __u32 claw_read_pages;
1461 __u32 claw_writes_perpage=1;
1462 __u32 claw_write_pages;
1463 void *p_buff=NULL;
1464 struct ccwbk*p_free_chain;
1465 struct ccwbk*p_buf;
1466 struct ccwbk*p_last_CCWB;
1467 struct ccwbk*p_first_CCWB;
1468 struct endccw *p_endccw=NULL;
6951df34
PT		 1469 addr_t real_address;
1470 struct claw_privbk *privptr = dev->ml_priv;
1da177e4
LT		 1471 struct clawh *pClawH=NULL;
1472 addr_t real_TIC_address;
1473 int i,j;
b805da74 1474 CLAW_DBF_TEXT(4, trace, "init_ccw");
1da177e4
LT		 1475
1476 /* initialize statistics field */
1477 privptr->active_link_ID=0;
1478 /* initialize ccwbk pointers */
1479 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
1480 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1481 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
1482 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
1483 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
1484 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
1485 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
1486 privptr->buffs_alloc = 0;
1487 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1488 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1489 /* initialize free write ccwbk counter */
1490 privptr->write_free_count=0; /* number of free bufs on write chain */
1491 p_last_CCWB = NULL;
1492 p_first_CCWB= NULL;
1493 /*
1494 * We need 1 CCW block for each read buffer, 1 for each
1495 * write buffer, plus 1 for ClawSignalBlock
1496 */
1497 ccw_blocks_required =
1498 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1da177e4
LT		 1499 /*
1500 * compute number of CCW blocks that will fit in a page
1501 */
1502 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
1503 ccw_pages_required=
f5154fbf 1504 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1da177e4 1505
1da177e4
LT		 1506 /*
1507 * read and write sizes are set by 2 constants in claw.h
1508 * 4k and 32k. Unpacked values other than 4k are not going to
1509 * provide good performance. With packing buffers support 32k
1510 * buffers are used.
1511 */
f5154fbf
JL		 1512 if (privptr->p_env->read_size < PAGE_SIZE) {
1513 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1514 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1515 claw_reads_perpage);
1da177e4
LT		 1516 }
1517 else { /* > or equal */
f5154fbf
JL		 1518 privptr->p_buff_pages_perread =
1519 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1520 claw_read_pages = privptr->p_env->read_buffers *
1521 privptr->p_buff_pages_perread;
1da177e4
LT		 1522 }
1523 if (privptr->p_env->write_size < PAGE_SIZE) {
f5154fbf
JL		 1524 claw_writes_perpage =
1525 PAGE_SIZE / privptr->p_env->write_size;
1526 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1527 claw_writes_perpage);
1da177e4
LT		 1528
1529 }
1530 else { /* > or equal */
f5154fbf
JL		 1531 privptr->p_buff_pages_perwrite =
1532 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1533 claw_write_pages = privptr->p_env->write_buffers *
1534 privptr->p_buff_pages_perwrite;
1da177e4 1535 }
1da177e4
LT		 1536 /*
1537 * allocate ccw_pages_required
1538 */
1539 if (privptr->p_buff_ccw==NULL) {
1540 privptr->p_buff_ccw=
1541 (void *)__get_free_pages(__GFP_DMA,
1542 (int)pages_to_order_of_mag(ccw_pages_required ));
1543 if (privptr->p_buff_ccw==NULL) {
1da177e4
LT		 1544 return -ENOMEM;
1545 }
1546 privptr->p_buff_ccw_num=ccw_pages_required;
1547 }
1548 memset(privptr->p_buff_ccw, 0x00,
1549 privptr->p_buff_ccw_num * PAGE_SIZE);
1550
1551 /*
1552 * obtain ending ccw block address
1553 *
1554 */
1555 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1556 real_address = (__u32)__pa(privptr->p_end_ccw);
1557 /* Initialize ending CCW block */
1da177e4
LT		 1558 p_endccw=privptr->p_end_ccw;
1559 p_endccw->real=real_address;
1560 p_endccw->write1=0x00;
1561 p_endccw->read1=0x00;
1562
1563 /* write1_nop1 */
1564 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1565 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1566 p_endccw->write1_nop1.count = 1;
1567 p_endccw->write1_nop1.cda = 0;
1568
1569 /* write1_nop2 */
1570 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1571 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1572 p_endccw->write1_nop2.count = 1;
1573 p_endccw->write1_nop2.cda = 0;
1574
1575 /* write2_nop1 */
1576 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1577 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1578 p_endccw->write2_nop1.count = 1;
1579 p_endccw->write2_nop1.cda = 0;
1580
1581 /* write2_nop2 */
1582 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1583 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1584 p_endccw->write2_nop2.count = 1;
1585 p_endccw->write2_nop2.cda = 0;
1586
1587 /* read1_nop1 */
1588 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1589 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1590 p_endccw->read1_nop1.count = 1;
1591 p_endccw->read1_nop1.cda = 0;
1592
1593 /* read1_nop2 */
1594 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1595 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1596 p_endccw->read1_nop2.count = 1;
1597 p_endccw->read1_nop2.cda = 0;
1598
1599 /* read2_nop1 */
1600 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1601 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1602 p_endccw->read2_nop1.count = 1;
1603 p_endccw->read2_nop1.cda = 0;
1604
1605 /* read2_nop2 */
1606 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1607 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1608 p_endccw->read2_nop2.count = 1;
1609 p_endccw->read2_nop2.cda = 0;
1610
1da177e4
LT		 1611 /*
1612 * Build a chain of CCWs
1613 *
1614 */
1da177e4
LT		 1615 p_buff=privptr->p_buff_ccw;
1616
1617 p_free_chain=NULL;
1618 for (i=0 ; i < ccw_pages_required; i++ ) {
1619 real_address = (__u32)__pa(p_buff);
1620 p_buf=p_buff;
1621 for (j=0 ; j < ccw_blocks_perpage ; j++) {
1622 p_buf->next = p_free_chain;
1623 p_free_chain = p_buf;
1624 p_buf->real=(__u32)__pa(p_buf);
1625 ++p_buf;
1626 }
1627 p_buff+=PAGE_SIZE;
1628 }
1da177e4
LT		 1629 /*
1630 * Initialize ClawSignalBlock
1631 *
1632 */
1da177e4
LT		 1633 if (privptr->p_claw_signal_blk==NULL) {
1634 privptr->p_claw_signal_blk=p_free_chain;
1635 p_free_chain=p_free_chain->next;
1636 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1637 pClawH->length=0xffff;
1638 pClawH->opcode=0xff;
1639 pClawH->flag=CLAW_BUSY;
1640 }
1da177e4
LT		 1641
1642 /*
1643 * allocate write_pages_required and add to free chain
1644 */
1645 if (privptr->p_buff_write==NULL) {
1646 if (privptr->p_env->write_size < PAGE_SIZE) {
1647 privptr->p_buff_write=
1648 (void *)__get_free_pages(__GFP_DMA,
1649 (int)pages_to_order_of_mag(claw_write_pages ));
1650 if (privptr->p_buff_write==NULL) {
1da177e4 1651 privptr->p_buff_ccw=NULL;
1da177e4
LT		 1652 return -ENOMEM;
1653 }
1654 /*
1655 * Build CLAW write free chain
1656 *
1657 */
1658
1659 memset(privptr->p_buff_write, 0x00,
1660 ccw_pages_required * PAGE_SIZE);
1da177e4
LT		 1661 privptr->p_write_free_chain=NULL;
1662
1663 p_buff=privptr->p_buff_write;
1664
1665 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1666 p_buf = p_free_chain; /* get a CCW */
1667 p_free_chain = p_buf->next;
1668 p_buf->next =privptr->p_write_free_chain;
1669 privptr->p_write_free_chain = p_buf;
1670 p_buf-> p_buffer = (struct clawbuf *)p_buff;
1671 p_buf-> write.cda = (__u32)__pa(p_buff);
1672 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1673 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1674 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1675 p_buf-> w_read_FF.count = 1;
1676 p_buf-> w_read_FF.cda =
1677 (__u32)__pa(&p_buf-> header.flag);
1678 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1679 p_buf-> w_TIC_1.flags = 0;
1680 p_buf-> w_TIC_1.count = 0;
1681
4811fcb7
AR		 1682 if (((unsigned long)p_buff +
1683 privptr->p_env->write_size) >=
1da177e4 1684 ((unsigned long)(p_buff+2*
4811fcb7
AR		 1685 (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1686 p_buff = p_buff+privptr->p_env->write_size;
1da177e4
LT		 1687 }
1688 }
1689 }
1690 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1691 {
1692 privptr->p_write_free_chain=NULL;
1693 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1694 p_buff=(void *)__get_free_pages(__GFP_DMA,
1695 (int)pages_to_order_of_mag(
1696 privptr->p_buff_pages_perwrite) );
1da177e4 1697 if (p_buff==NULL) {
1da177e4
LT		 1698 free_pages((unsigned long)privptr->p_buff_ccw,
1699 (int)pages_to_order_of_mag(
1700 privptr->p_buff_ccw_num));
1701 privptr->p_buff_ccw=NULL;
1702 p_buf=privptr->p_buff_write;
1703 while (p_buf!=NULL) {
1704 free_pages((unsigned long)
1705 p_buf->p_buffer,
1706 (int)pages_to_order_of_mag(
1707 privptr->p_buff_pages_perwrite));
1708 p_buf=p_buf->next;
1709 }
1da177e4
LT		 1710 return -ENOMEM;
1711 } /* Error on get_pages */
1712 memset(p_buff, 0x00, privptr->p_env->write_size );
1713 p_buf = p_free_chain;
1714 p_free_chain = p_buf->next;
1715 p_buf->next = privptr->p_write_free_chain;
1716 privptr->p_write_free_chain = p_buf;
1717 privptr->p_buff_write = p_buf;
1718 p_buf->p_buffer=(struct clawbuf *)p_buff;
1719 p_buf-> write.cda = (__u32)__pa(p_buff);
1720 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1721 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1722 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1723 p_buf-> w_read_FF.count = 1;
1724 p_buf-> w_read_FF.cda =
1725 (__u32)__pa(&p_buf-> header.flag);
1726 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1727 p_buf-> w_TIC_1.flags = 0;
1728 p_buf-> w_TIC_1.count = 0;
1729 } /* for all write_buffers */
1730
1731 } /* else buffers are PAGE_SIZE or bigger */
1732
1733 }
1734 privptr->p_buff_write_num=claw_write_pages;
1735 privptr->write_free_count=privptr->p_env->write_buffers;
1736
1737
1da177e4
LT		 1738 /*
1739 * allocate read_pages_required and chain to free chain
1740 */
1741 if (privptr->p_buff_read==NULL) {
1742 if (privptr->p_env->read_size < PAGE_SIZE) {
1743 privptr->p_buff_read=
1744 (void *)__get_free_pages(__GFP_DMA,
1745 (int)pages_to_order_of_mag(claw_read_pages) );
1746 if (privptr->p_buff_read==NULL) {
1da177e4
LT		 1747 free_pages((unsigned long)privptr->p_buff_ccw,
1748 (int)pages_to_order_of_mag(
1749 privptr->p_buff_ccw_num));
1750 /* free the write pages size is < page size */
1751 free_pages((unsigned long)privptr->p_buff_write,
1752 (int)pages_to_order_of_mag(
1753 privptr->p_buff_write_num));
1754 privptr->p_buff_ccw=NULL;
1755 privptr->p_buff_write=NULL;
1da177e4
LT		 1756 return -ENOMEM;
1757 }
1758 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1759 privptr->p_buff_read_num=claw_read_pages;
1760 /*
1761 * Build CLAW read free chain
1762 *
1763 */
1da177e4
LT		 1764 p_buff=privptr->p_buff_read;
1765 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1766 p_buf = p_free_chain;
1767 p_free_chain = p_buf->next;
1768
1769 if (p_last_CCWB==NULL) {
1770 p_buf->next=NULL;
1771 real_TIC_address=0;
1772 p_last_CCWB=p_buf;
1773 }
1774 else {
1775 p_buf->next=p_first_CCWB;
1776 real_TIC_address=
1777 (__u32)__pa(&p_first_CCWB -> read );
1778 }
1779
1780 p_first_CCWB=p_buf;
1781
1782 p_buf->p_buffer=(struct clawbuf *)p_buff;
1783 /* initialize read command */
1784 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1785 p_buf-> read.cda = (__u32)__pa(p_buff);
1786 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1787 p_buf-> read.count = privptr->p_env->read_size;
1788
1789 /* initialize read_h command */
1790 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1791 p_buf-> read_h.cda =
1792 (__u32)__pa(&(p_buf->header));
1793 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1794 p_buf-> read_h.count = sizeof(struct clawh);
1795
1796 /* initialize Signal command */
1797 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1798 p_buf-> signal.cda =
1799 (__u32)__pa(&(pClawH->flag));
1800 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1801 p_buf-> signal.count = 1;
1802
1803 /* initialize r_TIC_1 command */
1804 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1805 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1806 p_buf-> r_TIC_1.flags = 0;
1807 p_buf-> r_TIC_1.count = 0;
1808
1809 /* initialize r_read_FF command */
1810 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1811 p_buf-> r_read_FF.cda =
1812 (__u32)__pa(&(pClawH->flag));
1813 p_buf-> r_read_FF.flags =
1814 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1815 p_buf-> r_read_FF.count = 1;
1816
1817 /* initialize r_TIC_2 */
1818 memcpy(&p_buf->r_TIC_2,
1819 &p_buf->r_TIC_1, sizeof(struct ccw1));
1820
1821 /* initialize Header */
1822 p_buf->header.length=0xffff;
1823 p_buf->header.opcode=0xff;
1824 p_buf->header.flag=CLAW_PENDING;
1825
4811fcb7
AR		 1826 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1827 ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1828 -1)
1829 & PAGE_MASK)) {
1da177e4
LT		 1830 p_buff= p_buff+privptr->p_env->read_size;
1831 }
1832 else {
1833 p_buff=
1834 (void *)((unsigned long)
4811fcb7 1835 (p_buff+2*(privptr->p_env->read_size)-1)
1da177e4
LT		 1836 & PAGE_MASK) ;
1837 }
1838 } /* for read_buffers */
1839 } /* read_size < PAGE_SIZE */
1840 else { /* read Size >= PAGE_SIZE */
1da177e4
LT		 1841 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1842 p_buff = (void *)__get_free_pages(__GFP_DMA,
4811fcb7
AR		 1843 (int)pages_to_order_of_mag(
1844 privptr->p_buff_pages_perread));
1da177e4 1845 if (p_buff==NULL) {
1da177e4 1846 free_pages((unsigned long)privptr->p_buff_ccw,
4811fcb7
AR		 1847 (int)pages_to_order_of_mag(privptr->
1848 p_buff_ccw_num));
1da177e4
LT		 1849 /* free the write pages */
1850 p_buf=privptr->p_buff_write;
1851 while (p_buf!=NULL) {
4811fcb7
AR		 1852 free_pages(
1853 (unsigned long)p_buf->p_buffer,
1854 (int)pages_to_order_of_mag(
1855 privptr->p_buff_pages_perwrite));
1da177e4
LT		 1856 p_buf=p_buf->next;
1857 }
1858 /* free any read pages already alloc */
1859 p_buf=privptr->p_buff_read;
1860 while (p_buf!=NULL) {
4811fcb7
AR		 1861 free_pages(
1862 (unsigned long)p_buf->p_buffer,
1863 (int)pages_to_order_of_mag(
1864 privptr->p_buff_pages_perread));
1da177e4
LT		 1865 p_buf=p_buf->next;
1866 }
1867 privptr->p_buff_ccw=NULL;
1868 privptr->p_buff_write=NULL;
1da177e4
LT		 1869 return -ENOMEM;
1870 }
1871 memset(p_buff, 0x00, privptr->p_env->read_size);
1872 p_buf = p_free_chain;
1873 privptr->p_buff_read = p_buf;
1874 p_free_chain = p_buf->next;
1875
1876 if (p_last_CCWB==NULL) {
1877 p_buf->next=NULL;
1878 real_TIC_address=0;
1879 p_last_CCWB=p_buf;
1880 }
1881 else {
1882 p_buf->next=p_first_CCWB;
1883 real_TIC_address=
1884 (addr_t)__pa(
1885 &p_first_CCWB -> read );
1886 }
1887
1888 p_first_CCWB=p_buf;
1889 /* save buff address */
1890 p_buf->p_buffer=(struct clawbuf *)p_buff;
1891 /* initialize read command */
1892 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1893 p_buf-> read.cda = (__u32)__pa(p_buff);
1894 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1895 p_buf-> read.count = privptr->p_env->read_size;
1896
1897 /* initialize read_h command */
1898 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1899 p_buf-> read_h.cda =
1900 (__u32)__pa(&(p_buf->header));
1901 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1902 p_buf-> read_h.count = sizeof(struct clawh);
1903
1904 /* initialize Signal command */
1905 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1906 p_buf-> signal.cda =
1907 (__u32)__pa(&(pClawH->flag));
1908 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1909 p_buf-> signal.count = 1;
1910
1911 /* initialize r_TIC_1 command */
1912 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1913 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1914 p_buf-> r_TIC_1.flags = 0;
1915 p_buf-> r_TIC_1.count = 0;
1916
1917 /* initialize r_read_FF command */
1918 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1919 p_buf-> r_read_FF.cda =
1920 (__u32)__pa(&(pClawH->flag));
1921 p_buf-> r_read_FF.flags =
1922 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1923 p_buf-> r_read_FF.count = 1;
1924
1925 /* initialize r_TIC_2 */
1926 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
1927 sizeof(struct ccw1));
1928
1929 /* initialize Header */
1930 p_buf->header.length=0xffff;
1931 p_buf->header.opcode=0xff;
1932 p_buf->header.flag=CLAW_PENDING;
1933
1934 } /* For read_buffers */
1935 } /* read_size >= PAGE_SIZE */
1936 } /* pBuffread = NULL */
1da177e4
LT		 1937 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
1938 privptr->buffs_alloc = 1;
b805da74 1939
1da177e4
LT		 1940 return 0;
1941} /* end of init_ccw_bk */
1942
1943/*-------------------------------------------------------------------*
1944* *
1945* probe_error *
1946* *
1947*--------------------------------------------------------------------*/
1948
1949static void
1950probe_error( struct ccwgroup_device *cgdev)
1951{
2b356b46 1952 struct claw_privbk *privptr;
b805da74
AR		 1953
1954 CLAW_DBF_TEXT(4, trace, "proberr");
dff59b64 1955 privptr = dev_get_drvdata(&cgdev->dev);
2b356b46 1956 if (privptr != NULL) {
dff59b64 1957 dev_set_drvdata(&cgdev->dev, NULL);
17fd682e 1958 kfree(privptr->p_env);
2b356b46
MS		 1959 kfree(privptr->p_mtc_envelope);
1960 kfree(privptr);
1961 }
1da177e4
LT		 1962} /* probe_error */
1963
1da177e4
LT		 1964/*-------------------------------------------------------------------*
1965* claw_process_control *
1966* *
1967* *
1968*--------------------------------------------------------------------*/
1969
1970static int
1971claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
1972{
1973
1974 struct clawbuf *p_buf;
1975 struct clawctl ctlbk;
1976 struct clawctl *p_ctlbk;
1977 char temp_host_name[8];
1978 char temp_ws_name[8];
1979 struct claw_privbk *privptr;
1980 struct claw_env *p_env;
1981 struct sysval *p_sysval;
1982 struct conncmd *p_connect=NULL;
1983 int rc;
1984 struct chbk *p_ch = NULL;
b805da74
AR		 1985 struct device *tdev;
1986 CLAW_DBF_TEXT(2, setup, "clw_cntl");
1da177e4
LT		 1987 udelay(1000); /* Wait a ms for the control packets to
1988 *catch up to each other */
6951df34 1989 privptr = dev->ml_priv;
1da177e4 1990 p_env=privptr->p_env;
319cb083 1991 tdev = &privptr->channel[READ_CHANNEL].cdev->dev;
1da177e4
LT		 1992 memcpy( &temp_host_name, p_env->host_name, 8);
1993 memcpy( &temp_ws_name, p_env->adapter_name , 8);
4811fcb7 1994 dev_info(tdev, "%s: CLAW device %.8s: "
1da177e4
LT		 1995 "Received Control Packet\n",
1996 dev->name, temp_ws_name);
1997 if (privptr->release_pend==1) {
1da177e4
LT		 1998 return 0;
1999 }
2000 p_buf=p_ccw->p_buffer;
2001 p_ctlbk=&ctlbk;
2002 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2003 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2004 } else {
2005 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2006 }
1da177e4
LT		 2007 switch (p_ctlbk->command)
2008 {
b805da74
AR		 2009 case SYSTEM_VALIDATE_REQUEST:
2010 if (p_ctlbk->version != CLAW_VERSION_ID) {
2011 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2012 CLAW_RC_WRONG_VERSION);
4811fcb7
AR		 2013 dev_warn(tdev, "The communication peer of %s"
2014 " uses an incorrect API version %d\n",
2015 dev->name, p_ctlbk->version);
b805da74
AR		 2016 }
2017 p_sysval = (struct sysval *)&(p_ctlbk->data);
4811fcb7
AR		 2018 dev_info(tdev, "%s: Recv Sys Validate Request: "
2019 "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2020 "Host name=%.8s\n",
2021 dev->name, p_ctlbk->version,
2022 p_ctlbk->linkid,
2023 p_ctlbk->correlator,
2024 p_sysval->WS_name,
2025 p_sysval->host_name);
b805da74
AR		 2026 if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2027 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2028 CLAW_RC_NAME_MISMATCH);
2029 CLAW_DBF_TEXT(2, setup, "HSTBAD");
2030 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2031 CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
4811fcb7
AR		 2032 dev_warn(tdev,
2033 "Host name %s for %s does not match the"
2034 " remote adapter name %s\n",
b805da74 2035 p_sysval->host_name,
4811fcb7 2036 dev->name,
b805da74
AR		 2037 temp_host_name);
2038 }
2039 if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2040 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2041 CLAW_RC_NAME_MISMATCH);
2042 CLAW_DBF_TEXT(2, setup, "WSNBAD");
2043 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2044 CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
4811fcb7
AR		 2045 dev_warn(tdev, "Adapter name %s for %s does not match"
2046 " the remote host name %s\n",
2047 p_sysval->WS_name,
2048 dev->name,
2049 temp_ws_name);
b805da74
AR		 2050 }
2051 if ((p_sysval->write_frame_size < p_env->write_size) &&
2052 (p_env->packing == 0)) {
2053 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2054 CLAW_RC_HOST_RCV_TOO_SMALL);
4811fcb7
AR		 2055 dev_warn(tdev,
2056 "The local write buffer is smaller than the"
2057 " remote read buffer\n");
b805da74
AR		 2058 CLAW_DBF_TEXT(2, setup, "wrtszbad");
2059 }
2060 if ((p_sysval->read_frame_size < p_env->read_size) &&
2061 (p_env->packing == 0)) {
2062 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2063 CLAW_RC_HOST_RCV_TOO_SMALL);
4811fcb7
AR		 2064 dev_warn(tdev,
2065 "The local read buffer is smaller than the"
2066 " remote write buffer\n");
b805da74
AR		 2067 CLAW_DBF_TEXT(2, setup, "rdsizbad");
2068 }
2069 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
4811fcb7
AR		 2070 dev_info(tdev,
2071 "CLAW device %.8s: System validate"
2072 " completed.\n", temp_ws_name);
2073 dev_info(tdev,
2074 "%s: sys Validate Rsize:%d Wsize:%d\n",
2075 dev->name, p_sysval->read_frame_size,
2076 p_sysval->write_frame_size);
b805da74
AR		 2077 privptr->system_validate_comp = 1;
2078 if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2079 p_env->packing = PACKING_ASK;
2080 claw_strt_conn_req(dev);
2081 break;
2082 case SYSTEM_VALIDATE_RESPONSE:
2083 p_sysval = (struct sysval *)&(p_ctlbk->data);
4811fcb7
AR		 2084 dev_info(tdev,
2085 "Settings for %s validated (version=%d, "
2086 "remote device=%d, rc=%d, adapter name=%.8s, "
2087 "host name=%.8s)\n",
b805da74
AR		 2088 dev->name,
2089 p_ctlbk->version,
2090 p_ctlbk->correlator,
2091 p_ctlbk->rc,
2092 p_sysval->WS_name,
2093 p_sysval->host_name);
2094 switch (p_ctlbk->rc) {
2095 case 0:
4811fcb7
AR		 2096 dev_info(tdev, "%s: CLAW device "
2097 "%.8s: System validate completed.\n",
2098 dev->name, temp_ws_name);
b805da74
AR		 2099 if (privptr->system_validate_comp == 0)
2100 claw_strt_conn_req(dev);
2101 privptr->system_validate_comp = 1;
2102 break;
2103 case CLAW_RC_NAME_MISMATCH:
4811fcb7
AR		 2104 dev_warn(tdev, "Validating %s failed because of"
2105 " a host or adapter name mismatch\n",
2106 dev->name);
b805da74
AR		 2107 break;
2108 case CLAW_RC_WRONG_VERSION:
4811fcb7
AR		 2109 dev_warn(tdev, "Validating %s failed because of a"
2110 " version conflict\n",
b805da74
AR		 2111 dev->name);
2112 break;
2113 case CLAW_RC_HOST_RCV_TOO_SMALL:
4811fcb7
AR		 2114 dev_warn(tdev, "Validating %s failed because of a"
2115 " frame size conflict\n",
b805da74
AR		 2116 dev->name);
2117 break;
2118 default:
4811fcb7
AR		 2119 dev_warn(tdev, "The communication peer of %s rejected"
2120 " the connection\n",
2121 dev->name);
b805da74
AR		 2122 break;
2123 }
2124 break;
1da177e4 2125
b805da74
AR		 2126 case CONNECTION_REQUEST:
2127 p_connect = (struct conncmd *)&(p_ctlbk->data);
4811fcb7 2128 dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
b805da74
AR		 2129 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2130 dev->name,
2131 p_ctlbk->version,
2132 p_ctlbk->linkid,
2133 p_ctlbk->correlator,
2134 p_connect->host_name,
2135 p_connect->WS_name);
2136 if (privptr->active_link_ID != 0) {
2137 claw_snd_disc(dev, p_ctlbk);
4811fcb7
AR		 2138 dev_info(tdev, "%s rejected a connection request"
2139 " because it is already active\n",
b805da74
AR		 2140 dev->name);
2141 }
2142 if (p_ctlbk->linkid != 1) {
2143 claw_snd_disc(dev, p_ctlbk);
4811fcb7
AR		 2144 dev_info(tdev, "%s rejected a request to open multiple"
2145 " connections\n",
b805da74
AR		 2146 dev->name);
2147 }
2148 rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2149 if (rc != 0) {
2150 claw_snd_disc(dev, p_ctlbk);
4811fcb7
AR		 2151 dev_info(tdev, "%s rejected a connection request"
2152 " because of a type mismatch\n",
b805da74
AR		 2153 dev->name);
2154 }
2155 claw_send_control(dev,
2156 CONNECTION_CONFIRM, p_ctlbk->linkid,
2157 p_ctlbk->correlator,
2158 0, p_connect->host_name,
2159 p_connect->WS_name);
2160 if (p_env->packing == PACKING_ASK) {
2161 p_env->packing = PACK_SEND;
2162 claw_snd_conn_req(dev, 0);
2163 }
4811fcb7 2164 dev_info(tdev, "%s: CLAW device %.8s: Connection "
b805da74
AR		 2165 "completed link_id=%d.\n",
2166 dev->name, temp_ws_name,
2167 p_ctlbk->linkid);
2168 privptr->active_link_ID = p_ctlbk->linkid;
319cb083 2169 p_ch = &privptr->channel[WRITE_CHANNEL];
b805da74
AR		 2170 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2171 break;
2172 case CONNECTION_RESPONSE:
2173 p_connect = (struct conncmd *)&(p_ctlbk->data);
4811fcb7 2174 dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
b805da74
AR		 2175 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2176 dev->name,
2177 p_ctlbk->version,
2178 p_ctlbk->linkid,
2179 p_ctlbk->correlator,
2180 p_ctlbk->rc,
2181 p_connect->host_name,
2182 p_connect->WS_name);
2183
2184 if (p_ctlbk->rc != 0) {
4811fcb7
AR		 2185 dev_warn(tdev, "The communication peer of %s rejected"
2186 " a connection request\n",
2187 dev->name);
b805da74
AR		 2188 return 1;
2189 }
2190 rc = find_link(dev,
2191 p_connect->host_name, p_connect->WS_name);
2192 if (rc != 0) {
2193 claw_snd_disc(dev, p_ctlbk);
4811fcb7
AR		 2194 dev_warn(tdev, "The communication peer of %s"
2195 " rejected a connection "
2196 "request because of a type mismatch\n",
b805da74
AR		 2197 dev->name);
2198 }
2199 /* should be until CONNECTION_CONFIRM */
2200 privptr->active_link_ID = -(p_ctlbk->linkid);
2201 break;
2202 case CONNECTION_CONFIRM:
2203 p_connect = (struct conncmd *)&(p_ctlbk->data);
4811fcb7
AR		 2204 dev_info(tdev,
2205 "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
b805da74
AR		 2206 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
2207 dev->name,
2208 p_ctlbk->version,
2209 p_ctlbk->linkid,
2210 p_ctlbk->correlator,
2211 p_connect->host_name,
2212 p_connect->WS_name);
2213 if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2214 privptr->active_link_ID = p_ctlbk->linkid;
2215 if (p_env->packing > PACKING_ASK) {
4811fcb7
AR		 2216 dev_info(tdev,
2217 "%s: Confirmed Now packing\n", dev->name);
1da177e4
LT		 2218 p_env->packing = DO_PACKED;
2219 }
319cb083 2220 p_ch = &privptr->channel[WRITE_CHANNEL];
b805da74
AR		 2221 wake_up(&p_ch->wait);
2222 } else {
4811fcb7
AR		 2223 dev_warn(tdev, "Activating %s failed because of"
2224 " an incorrect link ID=%d\n",
b805da74
AR		 2225 dev->name, p_ctlbk->linkid);
2226 claw_snd_disc(dev, p_ctlbk);
2227 }
2228 break;
2229 case DISCONNECT:
4811fcb7 2230 dev_info(tdev, "%s: Disconnect: "
b805da74
AR		 2231 "Vers=%d,link_id=%d,Corr=%d\n",
2232 dev->name, p_ctlbk->version,
2233 p_ctlbk->linkid, p_ctlbk->correlator);
2234 if ((p_ctlbk->linkid == 2) &&
2235 (p_env->packing == PACK_SEND)) {
2236 privptr->active_link_ID = 1;
2237 p_env->packing = DO_PACKED;
2238 } else
2239 privptr->active_link_ID = 0;
2240 break;
2241 case CLAW_ERROR:
4811fcb7 2242 dev_warn(tdev, "The communication peer of %s failed\n",
b805da74
AR		 2243 dev->name);
2244 break;
2245 default:
4811fcb7
AR		 2246 dev_warn(tdev, "The communication peer of %s sent"
2247 " an unknown command code\n",
2248 dev->name);
b805da74 2249 break;
1da177e4
LT		 2250 }
2251
1da177e4
LT		 2252 return 0;
2253} /* end of claw_process_control */
2254
2255
2256/*-------------------------------------------------------------------*
2257* claw_send_control *
2258* *
2259*--------------------------------------------------------------------*/
2260
2261static int
2262claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2263 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2264{
2265 struct claw_privbk *privptr;
2266 struct clawctl *p_ctl;
2267 struct sysval *p_sysval;
2268 struct conncmd *p_connect;
2269 struct sk_buff *skb;
2270
b805da74 2271 CLAW_DBF_TEXT(2, setup, "sndcntl");
6951df34 2272 privptr = dev->ml_priv;
1da177e4
LT		 2273 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2274
2275 p_ctl->command=type;
2276 p_ctl->version=CLAW_VERSION_ID;
2277 p_ctl->linkid=link;
2278 p_ctl->correlator=correlator;
2279 p_ctl->rc=rc;
2280
2281 p_sysval=(struct sysval *)&p_ctl->data;
2282 p_connect=(struct conncmd *)&p_ctl->data;
2283
2284 switch (p_ctl->command) {
2285 case SYSTEM_VALIDATE_REQUEST:
2286 case SYSTEM_VALIDATE_RESPONSE:
2287 memcpy(&p_sysval->host_name, local_name, 8);
2288 memcpy(&p_sysval->WS_name, remote_name, 8);
2289 if (privptr->p_env->packing > 0) {
4811fcb7
AR		 2290 p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2291 p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
1da177e4 2292 } else {
b805da74 2293 /* how big is the biggest group of packets */
4811fcb7
AR		 2294 p_sysval->read_frame_size =
2295 privptr->p_env->read_size;
2296 p_sysval->write_frame_size =
2297 privptr->p_env->write_size;
1da177e4
LT		 2298 }
2299 memset(&p_sysval->reserved, 0x00, 4);
2300 break;
2301 case CONNECTION_REQUEST:
2302 case CONNECTION_RESPONSE:
2303 case CONNECTION_CONFIRM:
2304 case DISCONNECT:
2305 memcpy(&p_sysval->host_name, local_name, 8);
2306 memcpy(&p_sysval->WS_name, remote_name, 8);
2307 if (privptr->p_env->packing > 0) {
2308 /* How big is the biggest packet */
2309 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2310 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2311 } else {
2312 memset(&p_connect->reserved1, 0x00, 4);
2313 memset(&p_connect->reserved2, 0x00, 4);
2314 }
2315 break;
2316 default:
2317 break;
2318 }
2319
2320 /* write Control Record to the device */
2321
2322
2323 skb = dev_alloc_skb(sizeof(struct clawctl));
2324 if (!skb) {
1da177e4
LT		 2325 return -ENOMEM;
2326 }
2327 memcpy(skb_put(skb, sizeof(struct clawctl)),
2328 p_ctl, sizeof(struct clawctl));
1da177e4
LT		 2329 if (privptr->p_env->packing >= PACK_SEND)
2330 claw_hw_tx(skb, dev, 1);
2331 else
2332 claw_hw_tx(skb, dev, 0);
1da177e4
LT		 2333 return 0;
2334} /* end of claw_send_control */
2335
2336/*-------------------------------------------------------------------*
2337* claw_snd_conn_req *
2338* *
2339*--------------------------------------------------------------------*/
2340static int
2341claw_snd_conn_req(struct net_device *dev, __u8 link)
2342{
2343 int rc;
6951df34 2344 struct claw_privbk *privptr = dev->ml_priv;
1da177e4
LT		 2345 struct clawctl *p_ctl;
2346
b805da74 2347 CLAW_DBF_TEXT(2, setup, "snd_conn");
1da177e4
LT		 2348 rc = 1;
2349 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2350 p_ctl->linkid = link;
2351 if ( privptr->system_validate_comp==0x00 ) {
1da177e4
LT		 2352 return rc;
2353 }
2354 if (privptr->p_env->packing == PACKING_ASK )
2355 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2356 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2357 if (privptr->p_env->packing == PACK_SEND) {
2358 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2359 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2360 }
2361 if (privptr->p_env->packing == 0)
2362 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2363 HOST_APPL_NAME, privptr->p_env->api_type);
1da177e4
LT		 2364 return rc;
2365
2366} /* end of claw_snd_conn_req */
2367
2368
2369/*-------------------------------------------------------------------*
2370* claw_snd_disc *
2371* *
2372*--------------------------------------------------------------------*/
2373
2374static int
2375claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2376{
2377 int rc;
2378 struct conncmd * p_connect;
2379
b805da74 2380 CLAW_DBF_TEXT(2, setup, "snd_dsc");
1da177e4
LT		 2381 p_connect=(struct conncmd *)&p_ctl->data;
2382
2383 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2384 p_ctl->correlator, 0,
2385 p_connect->host_name, p_connect->WS_name);
1da177e4
LT		 2386 return rc;
2387} /* end of claw_snd_disc */
2388
2389
2390/*-------------------------------------------------------------------*
2391* claw_snd_sys_validate_rsp *
2392* *
2393*--------------------------------------------------------------------*/
2394
2395static int
2396claw_snd_sys_validate_rsp(struct net_device *dev,
2397 struct clawctl *p_ctl, __u32 return_code)
2398{
2399 struct claw_env * p_env;
2400 struct claw_privbk *privptr;
2401 int rc;
2402
b805da74 2403 CLAW_DBF_TEXT(2, setup, "chkresp");
6951df34 2404 privptr = dev->ml_priv;
1da177e4
LT		 2405 p_env=privptr->p_env;
2406 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2407 p_ctl->linkid,
2408 p_ctl->correlator,
2409 return_code,
2410 p_env->host_name,
2411 p_env->adapter_name );
1da177e4
LT		 2412 return rc;
2413} /* end of claw_snd_sys_validate_rsp */
2414
2415/*-------------------------------------------------------------------*
2416* claw_strt_conn_req *
2417* *
2418*--------------------------------------------------------------------*/
2419
2420static int
2421claw_strt_conn_req(struct net_device *dev )
2422{
2423 int rc;
2424
b805da74 2425 CLAW_DBF_TEXT(2, setup, "conn_req");
1da177e4 2426 rc=claw_snd_conn_req(dev, 1);
1da177e4
LT		 2427 return rc;
2428} /* end of claw_strt_conn_req */
2429
2430
2431
2432/*-------------------------------------------------------------------*
2433 * claw_stats *
2434 *-------------------------------------------------------------------*/
2435
2436static struct
2437net_device_stats *claw_stats(struct net_device *dev)
2438{
2439 struct claw_privbk *privptr;
b805da74
AR		 2440
2441 CLAW_DBF_TEXT(4, trace, "stats");
6951df34 2442 privptr = dev->ml_priv;
1da177e4
LT		 2443 return &privptr->stats;
2444} /* end of claw_stats */
2445
2446
2447/*-------------------------------------------------------------------*
2448* unpack_read *
2449* *
2450*--------------------------------------------------------------------*/
2451static void
2452unpack_read(struct net_device *dev )
2453{
2454 struct sk_buff *skb;
2455 struct claw_privbk *privptr;
2456 struct claw_env *p_env;
2457 struct ccwbk *p_this_ccw;
2458 struct ccwbk *p_first_ccw;
2459 struct ccwbk *p_last_ccw;
2460 struct clawph *p_packh;
2461 void *p_packd;
2462 struct clawctl *p_ctlrec=NULL;
b805da74 2463 struct device *p_dev;
1da177e4
LT		 2464
2465 __u32 len_of_data;
2466 __u32 pack_off;
2467 __u8 link_num;
2468 __u8 mtc_this_frm=0;
2469 __u32 bytes_to_mov;
1da177e4
LT		 2470 int i=0;
2471 int p=0;
2472
b805da74 2473 CLAW_DBF_TEXT(4, trace, "unpkread");
1da177e4
LT		 2474 p_first_ccw=NULL;
2475 p_last_ccw=NULL;
2476 p_packh=NULL;
2477 p_packd=NULL;
6951df34 2478 privptr = dev->ml_priv;
b805da74 2479
319cb083 2480 p_dev = &privptr->channel[READ_CHANNEL].cdev->dev;
1da177e4
LT		 2481 p_env = privptr->p_env;
2482 p_this_ccw=privptr->p_read_active_first;
1da177e4 2483 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
1da177e4
LT		 2484 pack_off = 0;
2485 p = 0;
2486 p_this_ccw->header.flag=CLAW_PENDING;
2487 privptr->p_read_active_first=p_this_ccw->next;
2488 p_this_ccw->next=NULL;
2489 p_packh = (struct clawph *)p_this_ccw->p_buffer;
2490 if ((p_env->packing == PACK_SEND) &&
2491 (p_packh->len == 32) &&
2492 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
2493 p_packh++; /* peek past pack header */
2494 p_ctlrec = (struct clawctl *)p_packh;
2495 p_packh--; /* un peek */
2496 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2497 (p_ctlrec->command == CONNECTION_CONFIRM))
2498 p_env->packing = DO_PACKED;
2499 }
2500 if (p_env->packing == DO_PACKED)
2501 link_num=p_packh->link_num;
2502 else
2503 link_num=p_this_ccw->header.opcode / 8;
2504 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
1da177e4
LT		 2505 mtc_this_frm=1;
2506 if (p_this_ccw->header.length!=
2507 privptr->p_env->read_size ) {
4811fcb7
AR		 2508 dev_warn(p_dev,
2509 "The communication peer of %s"
2510 " sent a faulty"
2511 " frame of length %02x\n",
1da177e4
LT		 2512 dev->name, p_this_ccw->header.length);
2513 }
2514 }
2515
2516 if (privptr->mtc_skipping) {
2517 /*
2518 * We're in the mode of skipping past a
2519 * multi-frame message
2520 * that we can't process for some reason or other.
2521 * The first frame without the More-To-Come flag is
2522 * the last frame of the skipped message.
2523 */
2524 /* in case of More-To-Come not set in this frame */
2525 if (mtc_this_frm==0) {
2526 privptr->mtc_skipping=0; /* Ok, the end */
2527 privptr->mtc_logical_link=-1;
2528 }
1da177e4
LT		 2529 goto NextFrame;
2530 }
2531
2532 if (link_num==0) {
2533 claw_process_control(dev, p_this_ccw);
b805da74 2534 CLAW_DBF_TEXT(4, trace, "UnpkCntl");
1da177e4
LT		 2535 goto NextFrame;
2536 }
2537unpack_next:
2538 if (p_env->packing == DO_PACKED) {
2539 if (pack_off > p_env->read_size)
2540 goto NextFrame;
2541 p_packd = p_this_ccw->p_buffer+pack_off;
2542 p_packh = (struct clawph *) p_packd;
4811fcb7 2543 if ((p_packh->len == 0) || /* done with this frame? */
1da177e4
LT		 2544 (p_packh->flag != 0))
2545 goto NextFrame;
2546 bytes_to_mov = p_packh->len;
2547 pack_off += bytes_to_mov+sizeof(struct clawph);
2548 p++;
2549 } else {
2550 bytes_to_mov=p_this_ccw->header.length;
2551 }
2552 if (privptr->mtc_logical_link<0) {
1da177e4
LT		 2553
2554 /*
2555 * if More-To-Come is set in this frame then we don't know
2556 * length of entire message, and hence have to allocate
2557 * large buffer */
2558
2559 /* We are starting a new envelope */
2560 privptr->mtc_offset=0;
2561 privptr->mtc_logical_link=link_num;
2562 }
2563
2564 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2565 /* error */
1da177e4
LT		 2566 privptr->stats.rx_frame_errors++;
2567 goto NextFrame;
2568 }
2569 if (p_env->packing == DO_PACKED) {
2570 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2571 p_packd+sizeof(struct clawph), bytes_to_mov);
2572
2573 } else {
2574 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2575 p_this_ccw->p_buffer, bytes_to_mov);
2576 }
1da177e4
LT		 2577 if (mtc_this_frm==0) {
2578 len_of_data=privptr->mtc_offset+bytes_to_mov;
2579 skb=dev_alloc_skb(len_of_data);
2580 if (skb) {
2581 memcpy(skb_put(skb,len_of_data),
2582 privptr->p_mtc_envelope,
2583 len_of_data);
1da177e4 2584 skb->dev=dev;
98e399f8 2585 skb_reset_mac_header(skb);
1da177e4
LT		 2586 skb->protocol=htons(ETH_P_IP);
2587 skb->ip_summed=CHECKSUM_UNNECESSARY;
2588 privptr->stats.rx_packets++;
2589 privptr->stats.rx_bytes+=len_of_data;
2590 netif_rx(skb);
1da177e4
LT		 2591 }
2592 else {
4811fcb7
AR		 2593 dev_info(p_dev, "Allocating a buffer for"
2594 " incoming data failed\n");
1da177e4 2595 privptr->stats.rx_dropped++;
1da177e4
LT		 2596 }
2597 privptr->mtc_offset=0;
2598 privptr->mtc_logical_link=-1;
2599 }
2600 else {
2601 privptr->mtc_offset+=bytes_to_mov;
2602 }
2603 if (p_env->packing == DO_PACKED)
2604 goto unpack_next;
2605NextFrame:
2606 /*
2607 * Remove ThisCCWblock from active read queue, and add it
2608 * to queue of free blocks to be reused.
2609 */
2610 i++;
2611 p_this_ccw->header.length=0xffff;
2612 p_this_ccw->header.opcode=0xff;
2613 /*
2614 * add this one to the free queue for later reuse
2615 */
2616 if (p_first_ccw==NULL) {
2617 p_first_ccw = p_this_ccw;
2618 }
2619 else {
2620 p_last_ccw->next = p_this_ccw;
2621 }
2622 p_last_ccw = p_this_ccw;
2623 /*
2624 * chain to next block on active read queue
2625 */
2626 p_this_ccw = privptr->p_read_active_first;
b805da74 2627 CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
1da177e4
LT		 2628 } /* end of while */
2629
2630 /* check validity */
2631
b805da74 2632 CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
1da177e4 2633 add_claw_reads(dev, p_first_ccw, p_last_ccw);
1da177e4 2634 claw_strt_read(dev, LOCK_YES);
1da177e4
LT		 2635 return;
2636} /* end of unpack_read */
2637
2638/*-------------------------------------------------------------------*
2639* claw_strt_read *
2640* *
2641*--------------------------------------------------------------------*/
2642static void
2643claw_strt_read (struct net_device *dev, int lock )
2644{
2645 int rc = 0;
2646 __u32 parm;
2647 unsigned long saveflags = 0;
6951df34 2648 struct claw_privbk *privptr = dev->ml_priv;
1da177e4
LT		 2649 struct ccwbk*p_ccwbk;
2650 struct chbk *p_ch;
2651 struct clawh *p_clawh;
319cb083 2652 p_ch = &privptr->channel[READ_CHANNEL];
1da177e4 2653
b805da74 2654 CLAW_DBF_TEXT(4, trace, "StRdNter");
1da177e4
LT		 2655 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2656 p_clawh->flag=CLAW_IDLE; /* 0x00 */
2657
2658 if ((privptr->p_write_active_first!=NULL &&
2659 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2660 (privptr->p_read_active_first!=NULL &&
2661 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2662 p_clawh->flag=CLAW_BUSY; /* 0xff */
2663 }
1da177e4
LT		 2664 if (lock==LOCK_YES) {
2665 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2666 }
2667 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
b805da74 2668 CLAW_DBF_TEXT(4, trace, "HotRead");
1da177e4
LT		 2669 p_ccwbk=privptr->p_read_active_first;
2670 parm = (unsigned long) p_ch;
2671 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2672 0xff, 0);
2673 if (rc != 0) {
2674 ccw_check_return_code(p_ch->cdev, rc);
2675 }
2676 }
2677 else {
b805da74 2678 CLAW_DBF_TEXT(2, trace, "ReadAct");
1da177e4
LT		 2679 }
2680
2681 if (lock==LOCK_YES) {
2682 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2683 }
b805da74 2684 CLAW_DBF_TEXT(4, trace, "StRdExit");
1da177e4
LT		 2685 return;
2686} /* end of claw_strt_read */
2687
2688/*-------------------------------------------------------------------*
2689* claw_strt_out_IO *
2690* *
2691*--------------------------------------------------------------------*/
2692
2693static void
2694claw_strt_out_IO( struct net_device *dev )
2695{
2696 int rc = 0;
2697 unsigned long parm;
2698 struct claw_privbk *privptr;
2699 struct chbk *p_ch;
2700 struct ccwbk *p_first_ccw;
2701
1da177e4
LT		 2702 if (!dev) {
2703 return;
2704 }
6951df34 2705 privptr = (struct claw_privbk *)dev->ml_priv;
319cb083 2706 p_ch = &privptr->channel[WRITE_CHANNEL];
1da177e4 2707
b805da74 2708 CLAW_DBF_TEXT(4, trace, "strt_io");
1da177e4
LT		 2709 p_first_ccw=privptr->p_write_active_first;
2710
2711 if (p_ch->claw_state == CLAW_STOP)
2712 return;
2713 if (p_first_ccw == NULL) {
1da177e4
LT		 2714 return;
2715 }
2716 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2717 parm = (unsigned long) p_ch;
b805da74 2718 CLAW_DBF_TEXT(2, trace, "StWrtIO");
4811fcb7
AR		 2719 rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2720 0xff, 0);
1da177e4
LT		 2721 if (rc != 0) {
2722 ccw_check_return_code(p_ch->cdev, rc);
2723 }
2724 }
2725 dev->trans_start = jiffies;
1da177e4
LT		 2726 return;
2727} /* end of claw_strt_out_IO */
2728
2729/*-------------------------------------------------------------------*
2730* Free write buffers *
2731* *
2732*--------------------------------------------------------------------*/
2733
2734static void
2735claw_free_wrt_buf( struct net_device *dev )
2736{
2737
6951df34 2738 struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
1da177e4
LT		 2739 struct ccwbk*p_this_ccw;
2740 struct ccwbk*p_next_ccw;
b805da74
AR		 2741
2742 CLAW_DBF_TEXT(4, trace, "freewrtb");
1da177e4 2743 /* scan the write queue to free any completed write packets */
1da177e4
LT		 2744 p_this_ccw=privptr->p_write_active_first;
2745 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2746 {
2747 p_next_ccw = p_this_ccw->next;
2748 if (((p_next_ccw!=NULL) &&
2749 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2750 ((p_this_ccw == privptr->p_write_active_last) &&
2751 (p_this_ccw->header.flag!=CLAW_PENDING))) {
2752 /* The next CCW is OK or this is */
2753 /* the last CCW...free it @A1A */
2754 privptr->p_write_active_first=p_this_ccw->next;
2755 p_this_ccw->header.flag=CLAW_PENDING;
2756 p_this_ccw->next=privptr->p_write_free_chain;
2757 privptr->p_write_free_chain=p_this_ccw;
2758 ++privptr->write_free_count;
2759 privptr->stats.tx_bytes+= p_this_ccw->write.count;
2760 p_this_ccw=privptr->p_write_active_first;
2761 privptr->stats.tx_packets++;
2762 }
2763 else {
2764 break;
2765 }
2766 }
2767 if (privptr->write_free_count!=0) {
2768 claw_clearbit_busy(TB_NOBUFFER,dev);
2769 }
2770 /* whole chain removed? */
2771 if (privptr->p_write_active_first==NULL) {
2772 privptr->p_write_active_last=NULL;
1da177e4 2773 }
b805da74 2774 CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
1da177e4
LT		 2775 return;
2776}
2777
2778/*-------------------------------------------------------------------*
2779* claw free netdevice *
2780* *
2781*--------------------------------------------------------------------*/
2782static void
2783claw_free_netdevice(struct net_device * dev, int free_dev)
2784{
2785 struct claw_privbk *privptr;
1da177e4 2786
b805da74 2787 CLAW_DBF_TEXT(2, setup, "free_dev");
1da177e4
LT		 2788 if (!dev)
2789 return;
b805da74 2790 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
6951df34 2791 privptr = dev->ml_priv;
1da177e4
LT		 2792 if (dev->flags & IFF_RUNNING)
2793 claw_release(dev);
2794 if (privptr) {
319cb083 2795 privptr->channel[READ_CHANNEL].ndev = NULL; /* say it's free */
1da177e4 2796 }
6951df34 2797 dev->ml_priv = NULL;
1da177e4
LT		 2798#ifdef MODULE
2799 if (free_dev) {
2800 free_netdev(dev);
2801 }
2802#endif
b805da74 2803 CLAW_DBF_TEXT(2, setup, "free_ok");
1da177e4
LT		 2804}
2805
2806/**
2807 * Claw init netdevice
2808 * Initialize everything of the net device except the name and the
2809 * channel structs.
2810 */
2171dc18
FB		 2811static const struct net_device_ops claw_netdev_ops = {
2812 .ndo_open = claw_open,
2813 .ndo_stop = claw_release,
2814 .ndo_get_stats = claw_stats,
2815 .ndo_start_xmit = claw_tx,
2816 .ndo_change_mtu = claw_change_mtu,
2817};
2818
1da177e4
LT		 2819static void
2820claw_init_netdevice(struct net_device * dev)
2821{
b805da74
AR		 2822 CLAW_DBF_TEXT(2, setup, "init_dev");
2823 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
1da177e4 2824 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
1da177e4
LT		 2825 dev->hard_header_len = 0;
2826 dev->addr_len = 0;
2827 dev->type = ARPHRD_SLIP;
2828 dev->tx_queue_len = 1300;
2829 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2171dc18 2830 dev->netdev_ops = &claw_netdev_ops;
b805da74 2831 CLAW_DBF_TEXT(2, setup, "initok");
1da177e4
LT		 2832 return;
2833}
2834
2835/**
2836 * Init a new channel in the privptr->channel[i].
2837 *
2838 * @param cdev The ccw_device to be added.
2839 *
2840 * @return 0 on success, !0 on error.
2841 */
2842static int
2843add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2844{
2845 struct chbk *p_ch;
dc5bc0ca 2846 struct ccw_dev_id dev_id;
1da177e4 2847
2a0217d5 2848 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
1da177e4
LT		 2849 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
2850 p_ch = &privptr->channel[i];
2851 p_ch->cdev = cdev;
2a0217d5 2852 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
dc5bc0ca
CH		 2853 ccw_device_get_id(cdev, &dev_id);
2854 p_ch->devno = dev_id.devno;
dd00cc48 2855 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
1da177e4
LT		 2856 return -ENOMEM;
2857 }
1da177e4
LT		 2858 return 0;
2859}
2860
2861
2862/**
2863 *
2864 * Setup an interface.
2865 *
2866 * @param cgdev Device to be setup.
2867 *
2868 * @returns 0 on success, !0 on failure.
2869 */
2870static int
2871claw_new_device(struct ccwgroup_device *cgdev)
2872{
2873 struct claw_privbk *privptr;
2874 struct claw_env *p_env;
2875 struct net_device *dev;
2876 int ret;
dc5bc0ca 2877 struct ccw_dev_id dev_id;
1da177e4 2878
4811fcb7 2879 dev_info(&cgdev->dev, "add for %s\n",
319cb083 2880 dev_name(&cgdev->cdev[READ_CHANNEL]->dev));
b805da74 2881 CLAW_DBF_TEXT(2, setup, "new_dev");
dff59b64 2882 privptr = dev_get_drvdata(&cgdev->dev);
319cb083
HC		 2883 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2884 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
1da177e4
LT		 2885 if (!privptr)
2886 return -ENODEV;
2887 p_env = privptr->p_env;
319cb083
HC		 2888 ccw_device_get_id(cgdev->cdev[READ_CHANNEL], &dev_id);
2889 p_env->devno[READ_CHANNEL] = dev_id.devno;
2890 ccw_device_get_id(cgdev->cdev[WRITE_CHANNEL], &dev_id);
2891 p_env->devno[WRITE_CHANNEL] = dev_id.devno;
1da177e4
LT		 2892 ret = add_channel(cgdev->cdev[0],0,privptr);
2893 if (ret == 0)
2894 ret = add_channel(cgdev->cdev[1],1,privptr);
2895 if (ret != 0) {
4811fcb7
AR		 2896 dev_warn(&cgdev->dev, "Creating a CLAW group device"
2897 " failed with error code %d\n", ret);
b805da74 2898 goto out;
1da177e4 2899 }
319cb083 2900 ret = ccw_device_set_online(cgdev->cdev[READ_CHANNEL]);
1da177e4 2901 if (ret != 0) {
4811fcb7
AR		 2902 dev_warn(&cgdev->dev,
2903 "Setting the read subchannel online"
2904 " failed with error code %d\n", ret);
1da177e4
LT		 2905 goto out;
2906 }
319cb083 2907 ret = ccw_device_set_online(cgdev->cdev[WRITE_CHANNEL]);
1da177e4 2908 if (ret != 0) {
4811fcb7
AR		 2909 dev_warn(&cgdev->dev,
2910 "Setting the write subchannel online "
2911 "failed with error code %d\n", ret);
1da177e4
LT		 2912 goto out;
2913 }
c835a677 2914 dev = alloc_netdev(0, "claw%d", NET_NAME_UNKNOWN, claw_init_netdevice);
1da177e4 2915 if (!dev) {
4811fcb7
AR		 2916 dev_warn(&cgdev->dev,
2917 "Activating the CLAW device failed\n");
1da177e4
LT		 2918 goto out;
2919 }
6951df34 2920 dev->ml_priv = privptr;
dff59b64 2921 dev_set_drvdata(&cgdev->dev, privptr);
319cb083
HC		 2922 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, privptr);
2923 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, privptr);
1da177e4
LT		 2924 /* sysfs magic */
2925 SET_NETDEV_DEV(dev, &cgdev->dev);
2926 if (register_netdev(dev) != 0) {
2927 claw_free_netdevice(dev, 1);
b805da74 2928 CLAW_DBF_TEXT(2, trace, "regfail");
1da177e4
LT		 2929 goto out;
2930 }
2931 dev->flags &=~IFF_RUNNING;
2932 if (privptr->buffs_alloc == 0) {
2933 ret=init_ccw_bk(dev);
2934 if (ret !=0) {
1da177e4
LT		 2935 unregister_netdev(dev);
2936 claw_free_netdevice(dev,1);
b805da74 2937 CLAW_DBF_TEXT(2, trace, "ccwmem");
1da177e4
LT		 2938 goto out;
2939 }
2940 }
319cb083
HC		 2941 privptr->channel[READ_CHANNEL].ndev = dev;
2942 privptr->channel[WRITE_CHANNEL].ndev = dev;
1da177e4
LT		 2943 privptr->p_env->ndev = dev;
2944
4811fcb7 2945 dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d "
1da177e4
LT		 2946 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
2947 dev->name, p_env->read_size,
2948 p_env->write_size, p_env->read_buffers,
319cb083
HC		 2949 p_env->write_buffers, p_env->devno[READ_CHANNEL],
2950 p_env->devno[WRITE_CHANNEL]);
4811fcb7 2951 dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
1da177e4
LT		 2952 ":%.8s api_type: %.8s\n",
2953 dev->name, p_env->host_name,
2954 p_env->adapter_name , p_env->api_type);
2955 return 0;
2956out:
2957 ccw_device_set_offline(cgdev->cdev[1]);
2958 ccw_device_set_offline(cgdev->cdev[0]);
1da177e4
LT		 2959 return -ENODEV;
2960}
2961
2962static void
2963claw_purge_skb_queue(struct sk_buff_head *q)
2964{
2965 struct sk_buff *skb;
2966
b805da74 2967 CLAW_DBF_TEXT(4, trace, "purgque");
1da177e4
LT		 2968 while ((skb = skb_dequeue(q))) {
2969 atomic_dec(&skb->users);
8e84c801 2970 dev_kfree_skb_any(skb);
1da177e4
LT		 2971 }
2972}
2973
2974/**
2975 * Shutdown an interface.
2976 *
2977 * @param cgdev Device to be shut down.
2978 *
2979 * @returns 0 on success, !0 on failure.
2980 */
2981static int
2982claw_shutdown_device(struct ccwgroup_device *cgdev)
2983{
2984 struct claw_privbk *priv;
2985 struct net_device *ndev;
38ed18ff 2986 int ret = 0;
1da177e4 2987
b9d3aed7 2988 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
dff59b64 2989 priv = dev_get_drvdata(&cgdev->dev);
1da177e4
LT		 2990 if (!priv)
2991 return -ENODEV;
319cb083 2992 ndev = priv->channel[READ_CHANNEL].ndev;
1da177e4
LT		 2993 if (ndev) {
2994 /* Close the device */
319cb083 2995 dev_info(&cgdev->dev, "%s: shutting down\n",
4811fcb7 2996 ndev->name);
1da177e4
LT		 2997 if (ndev->flags & IFF_RUNNING)
2998 ret = claw_release(ndev);
2999 ndev->flags &=~IFF_RUNNING;
3000 unregister_netdev(ndev);
6951df34 3001 ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
1da177e4 3002 claw_free_netdevice(ndev, 1);
319cb083
HC		 3003 priv->channel[READ_CHANNEL].ndev = NULL;
3004 priv->channel[WRITE_CHANNEL].ndev = NULL;
1da177e4
LT		 3005 priv->p_env->ndev = NULL;
3006 }
3007 ccw_device_set_offline(cgdev->cdev[1]);
3008 ccw_device_set_offline(cgdev->cdev[0]);
38ed18ff 3009 return ret;
1da177e4
LT		 3010}
3011
3012static void
3013claw_remove_device(struct ccwgroup_device *cgdev)
3014{
3015 struct claw_privbk *priv;
3016
b9d3aed7 3017 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
dff59b64 3018 priv = dev_get_drvdata(&cgdev->dev);
4811fcb7 3019 dev_info(&cgdev->dev, " will be removed.\n");
1da177e4
LT		 3020 if (cgdev->state == CCWGROUP_ONLINE)
3021 claw_shutdown_device(cgdev);
17fd682e
JJ		 3022 kfree(priv->p_mtc_envelope);
3023 priv->p_mtc_envelope=NULL;
3024 kfree(priv->p_env);
3025 priv->p_env=NULL;
3026 kfree(priv->channel[0].irb);
3027 priv->channel[0].irb=NULL;
3028 kfree(priv->channel[1].irb);
3029 priv->channel[1].irb=NULL;
1da177e4 3030 kfree(priv);
dff59b64 3031 dev_set_drvdata(&cgdev->dev, NULL);
319cb083
HC		 3032 dev_set_drvdata(&cgdev->cdev[READ_CHANNEL]->dev, NULL);
3033 dev_set_drvdata(&cgdev->cdev[WRITE_CHANNEL]->dev, NULL);
1da177e4 3034 put_device(&cgdev->dev);
b805da74
AR		 3035
3036 return;
1da177e4
LT		 3037}
3038
3039
3040/*
3041 * sysfs attributes
3042 */
3043static ssize_t
3fd3c0a5 3044claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3045{
3046 struct claw_privbk *priv;
3047 struct claw_env * p_env;
3048
dff59b64 3049 priv = dev_get_drvdata(dev);
1da177e4
LT		 3050 if (!priv)
3051 return -ENODEV;
3052 p_env = priv->p_env;
3053 return sprintf(buf, "%s\n",p_env->host_name);
3054}
3055
3056static ssize_t
4811fcb7
AR		 3057claw_hname_write(struct device *dev, struct device_attribute *attr,
3058 const char *buf, size_t count)
1da177e4
LT		 3059{
3060 struct claw_privbk *priv;
3061 struct claw_env * p_env;
3062
dff59b64 3063 priv = dev_get_drvdata(dev);
1da177e4
LT		 3064 if (!priv)
3065 return -ENODEV;
3066 p_env = priv->p_env;
3067 if (count > MAX_NAME_LEN+1)
3068 return -EINVAL;
3069 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3070 strncpy(p_env->host_name,buf, count);
3071 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
3072 p_env->host_name[MAX_NAME_LEN] = 0x00;
b805da74
AR		 3073 CLAW_DBF_TEXT(2, setup, "HstnSet");
3074 CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
1da177e4
LT		 3075
3076 return count;
3077}
3078
3079static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3080
3081static ssize_t
3fd3c0a5 3082claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3083{
3084 struct claw_privbk *priv;
3085 struct claw_env * p_env;
3086
dff59b64 3087 priv = dev_get_drvdata(dev);
1da177e4
LT		 3088 if (!priv)
3089 return -ENODEV;
3090 p_env = priv->p_env;
b805da74 3091 return sprintf(buf, "%s\n", p_env->adapter_name);
1da177e4
LT		 3092}
3093
3094static ssize_t
4811fcb7
AR		 3095claw_adname_write(struct device *dev, struct device_attribute *attr,
3096 const char *buf, size_t count)
1da177e4
LT		 3097{
3098 struct claw_privbk *priv;
3099 struct claw_env * p_env;
3100
dff59b64 3101 priv = dev_get_drvdata(dev);
1da177e4
LT		 3102 if (!priv)
3103 return -ENODEV;
3104 p_env = priv->p_env;
3105 if (count > MAX_NAME_LEN+1)
3106 return -EINVAL;
3107 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3108 strncpy(p_env->adapter_name,buf, count);
3109 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3110 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
b805da74
AR		 3111 CLAW_DBF_TEXT(2, setup, "AdnSet");
3112 CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
1da177e4
LT		 3113
3114 return count;
3115}
3116
3117static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3118
3119static ssize_t
3fd3c0a5 3120claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3121{
3122 struct claw_privbk *priv;
3123 struct claw_env * p_env;
3124
dff59b64 3125 priv = dev_get_drvdata(dev);
1da177e4
LT		 3126 if (!priv)
3127 return -ENODEV;
3128 p_env = priv->p_env;
3129 return sprintf(buf, "%s\n",
3130 p_env->api_type);
3131}
3132
3133static ssize_t
4811fcb7
AR		 3134claw_apname_write(struct device *dev, struct device_attribute *attr,
3135 const char *buf, size_t count)
1da177e4
LT		 3136{
3137 struct claw_privbk *priv;
3138 struct claw_env * p_env;
3139
dff59b64 3140 priv = dev_get_drvdata(dev);
1da177e4
LT		 3141 if (!priv)
3142 return -ENODEV;
3143 p_env = priv->p_env;
3144 if (count > MAX_NAME_LEN+1)
3145 return -EINVAL;
3146 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3147 strncpy(p_env->api_type,buf, count);
3148 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
3149 p_env->api_type[MAX_NAME_LEN] = 0x00;
3150 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3151 p_env->read_size=DEF_PACK_BUFSIZE;
3152 p_env->write_size=DEF_PACK_BUFSIZE;
3153 p_env->packing=PACKING_ASK;
b805da74 3154 CLAW_DBF_TEXT(2, setup, "PACKING");
1da177e4
LT		 3155 }
3156 else {
3157 p_env->packing=0;
3158 p_env->read_size=CLAW_FRAME_SIZE;
3159 p_env->write_size=CLAW_FRAME_SIZE;
b805da74 3160 CLAW_DBF_TEXT(2, setup, "ApiSet");
1da177e4 3161 }
b805da74 3162 CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
1da177e4
LT		 3163 return count;
3164}
3165
3166static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3167
3168static ssize_t
3fd3c0a5 3169claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3170{
3171 struct claw_privbk *priv;
3172 struct claw_env * p_env;
3173
dff59b64 3174 priv = dev_get_drvdata(dev);
1da177e4
LT		 3175 if (!priv)
3176 return -ENODEV;
3177 p_env = priv->p_env;
3178 return sprintf(buf, "%d\n", p_env->write_buffers);
3179}
3180
3181static ssize_t
4811fcb7
AR		 3182claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3183 const char *buf, size_t count)
1da177e4
LT		 3184{
3185 struct claw_privbk *priv;
3186 struct claw_env * p_env;
3187 int nnn,max;
3188
dff59b64 3189 priv = dev_get_drvdata(dev);
1da177e4
LT		 3190 if (!priv)
3191 return -ENODEV;
3192 p_env = priv->p_env;
3193 sscanf(buf, "%i", &nnn);
3194 if (p_env->packing) {
3195 max = 64;
3196 }
3197 else {
3198 max = 512;
3199 }
3200 if ((nnn > max ) || (nnn < 2))
3201 return -EINVAL;
3202 p_env->write_buffers = nnn;
b805da74
AR		 3203 CLAW_DBF_TEXT(2, setup, "Wbufset");
3204 CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
1da177e4
LT		 3205 return count;
3206}
3207
3208static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3209
3210static ssize_t
3fd3c0a5 3211claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3212{
3213 struct claw_privbk *priv;
3214 struct claw_env * p_env;
3215
dff59b64 3216 priv = dev_get_drvdata(dev);
1da177e4
LT		 3217 if (!priv)
3218 return -ENODEV;
3219 p_env = priv->p_env;
3220 return sprintf(buf, "%d\n", p_env->read_buffers);
3221}
3222
3223static ssize_t
4811fcb7
AR		 3224claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3225 const char *buf, size_t count)
1da177e4
LT		 3226{
3227 struct claw_privbk *priv;
3228 struct claw_env *p_env;
3229 int nnn,max;
3230
dff59b64 3231 priv = dev_get_drvdata(dev);
1da177e4
LT		 3232 if (!priv)
3233 return -ENODEV;
3234 p_env = priv->p_env;
3235 sscanf(buf, "%i", &nnn);
3236 if (p_env->packing) {
3237 max = 64;
3238 }
3239 else {
3240 max = 512;
3241 }
3242 if ((nnn > max ) || (nnn < 2))
3243 return -EINVAL;
3244 p_env->read_buffers = nnn;
b805da74
AR		 3245 CLAW_DBF_TEXT(2, setup, "Rbufset");
3246 CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
1da177e4
LT		 3247 return count;
3248}
1da177e4
LT		 3249static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3250
3251static struct attribute *claw_attr[] = {
3252 &dev_attr_read_buffer.attr,
3253 &dev_attr_write_buffer.attr,
3254 &dev_attr_adapter_name.attr,
3255 &dev_attr_api_type.attr,
3256 &dev_attr_host_name.attr,
3257 NULL,
3258};
1da177e4
LT		 3259static struct attribute_group claw_attr_group = {
3260 .attrs = claw_attr,
3261};
2ced5514
SO		 3262static const struct attribute_group *claw_attr_groups[] = {
3263 &claw_attr_group,
3264 NULL,
3265};
3266static const struct device_type claw_devtype = {
3267 .name = "claw",
3268 .groups = claw_attr_groups,
3269};
1da177e4 3270
2ced5514
SO		 3271/*----------------------------------------------------------------*
3272 * claw_probe *
3273 * this function is called for each CLAW device. *
3274 *----------------------------------------------------------------*/
3275static int claw_probe(struct ccwgroup_device *cgdev)
1da177e4 3276{
2ced5514 3277 struct claw_privbk *privptr = NULL;
1da177e4 3278
2ced5514
SO		 3279 CLAW_DBF_TEXT(2, setup, "probe");
3280 if (!get_device(&cgdev->dev))
3281 return -ENODEV;
3282 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
3283 dev_set_drvdata(&cgdev->dev, privptr);
3284 if (privptr == NULL) {
3285 probe_error(cgdev);
3286 put_device(&cgdev->dev);
3287 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
3288 return -ENOMEM;
3289 }
3290 privptr->p_mtc_envelope = kzalloc(MAX_ENVELOPE_SIZE, GFP_KERNEL);
3291 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
3292 if ((privptr->p_mtc_envelope == NULL) || (privptr->p_env == NULL)) {
3293 probe_error(cgdev);
3294 put_device(&cgdev->dev);
3295 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
3296 return -ENOMEM;
3297 }
3298 memcpy(privptr->p_env->adapter_name, WS_NAME_NOT_DEF, 8);
3299 memcpy(privptr->p_env->host_name, WS_NAME_NOT_DEF, 8);
3300 memcpy(privptr->p_env->api_type, WS_NAME_NOT_DEF, 8);
3301 privptr->p_env->packing = 0;
3302 privptr->p_env->write_buffers = 5;
3303 privptr->p_env->read_buffers = 5;
3304 privptr->p_env->read_size = CLAW_FRAME_SIZE;
3305 privptr->p_env->write_size = CLAW_FRAME_SIZE;
3306 privptr->p_env->p_priv = privptr;
3307 cgdev->cdev[0]->handler = claw_irq_handler;
3308 cgdev->cdev[1]->handler = claw_irq_handler;
3309 cgdev->dev.type = &claw_devtype;
3310 CLAW_DBF_TEXT(2, setup, "prbext 0");
3311
3312 return 0;
3313} /* end of claw_probe */
1da177e4
LT		 3314
3315/*--------------------------------------------------------------------*
3316* claw_init and cleanup *
3317*---------------------------------------------------------------------*/
3318
a43f8de6 3319static void __exit claw_cleanup(void)
1da177e4 3320{
0ca8cc6f
UB		 3321 ccwgroup_driver_unregister(&claw_group_driver);
3322 ccw_driver_unregister(&claw_ccw_driver);
3323 root_device_unregister(claw_root_dev);
1da177e4 3324 claw_unregister_debug_facility();
4811fcb7 3325 pr_info("Driver unloaded\n");
1da177e4
LT		 3326}
3327
3328/**
3329 * Initialize module.
3330 * This is called just after the module is loaded.
3331 *
3332 * @return 0 on success, !0 on error.
3333 */
a43f8de6 3334static int __init claw_init(void)
1da177e4
LT		 3335{
3336 int ret = 0;
1da177e4 3337
4811fcb7 3338 pr_info("Loading %s\n", version);
1da177e4
LT		 3339 ret = claw_register_debug_facility();
3340 if (ret) {
4811fcb7
AR		 3341 pr_err("Registering with the S/390 debug feature"
3342 " failed with error code %d\n", ret);
0ca8cc6f 3343 goto out_err;
1da177e4 3344 }
b805da74 3345 CLAW_DBF_TEXT(2, setup, "init_mod");
d950d177 3346 claw_root_dev = root_device_register("claw");
16dc2c40 3347 ret = PTR_ERR_OR_ZERO(claw_root_dev);
0ca8cc6f
UB		 3348 if (ret)
3349 goto register_err;
3350 ret = ccw_driver_register(&claw_ccw_driver);
3351 if (ret)
3352 goto ccw_err;
a43f8de6 3353 claw_group_driver.driver.groups = claw_drv_attr_groups;
0ca8cc6f
UB		 3354 ret = ccwgroup_driver_register(&claw_group_driver);
3355 if (ret)
3356 goto ccwgroup_err;
3357 return 0;
3358
3359ccwgroup_err:
3360 ccw_driver_unregister(&claw_ccw_driver);
3361ccw_err:
3362 root_device_unregister(claw_root_dev);
3363register_err:
3364 CLAW_DBF_TEXT(2, setup, "init_bad");
3365 claw_unregister_debug_facility();
3366out_err:
3367 pr_err("Initializing the claw device driver failed\n");
1da177e4
LT		 3368 return ret;
3369}
3370
3371module_init(claw_init);
3372module_exit(claw_cleanup);
3373
b805da74
AR		 3374MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
3375MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
a53c8fab 3376 "Copyright IBM Corp. 2000, 2008\n");
b805da74 3377MODULE_LICENSE("GPL");
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