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ctcm: fix minor findings from code analysis tool
[deliverable/linux.git] / drivers / s390 / net / claw.c
CommitLineData
1da177e4
LT		 1/*
2 * drivers/s390/net/claw.c
3 * ESCON CLAW network driver
4 *
8e84c801 5 * Linux for zSeries version
1da177e4
LT		 6 * Copyright (C) 2002,2005 IBM Corporation
7 * Author(s) Original code written by:
8 * Kazuo Iimura (iimura@jp.ibm.com)
9 * Rewritten by
10 * Andy Richter (richtera@us.ibm.com)
11 * Marc Price (mwprice@us.ibm.com)
12 *
13 * sysfs parms:
14 * group x.x.rrrr,x.x.wwww
15 * read_buffer nnnnnnn
16 * write_buffer nnnnnn
17 * host_name aaaaaaaa
18 * adapter_name aaaaaaaa
19 * api_type aaaaaaaa
20 *
21 * eg.
22 * group 0.0.0200 0.0.0201
23 * read_buffer 25
24 * write_buffer 20
25 * host_name LINUX390
26 * adapter_name RS6K
27 * api_type TCPIP
28 *
29 * where
30 *
31 * The device id is decided by the order entries
32 * are added to the group the first is claw0 the second claw1
33 * up to CLAW_MAX_DEV
34 *
35 * rrrr - the first of 2 consecutive device addresses used for the
36 * CLAW protocol.
37 * The specified address is always used as the input (Read)
38 * channel and the next address is used as the output channel.
39 *
40 * wwww - the second of 2 consecutive device addresses used for
41 * the CLAW protocol.
42 * The specified address is always used as the output
43 * channel and the previous address is used as the input channel.
44 *
45 * read_buffer - specifies number of input buffers to allocate.
46 * write_buffer - specifies number of output buffers to allocate.
47 * host_name - host name
48 * adaptor_name - adaptor name
49 * api_type - API type TCPIP or API will be sent and expected
50 * as ws_name
51 *
52 * Note the following requirements:
53 * 1) host_name must match the configured adapter_name on the remote side
54 * 2) adaptor_name must match the configured host name on the remote side
55 *
56 * Change History
57 * 1.00 Initial release shipped
58 * 1.10 Changes for Buffer allocation
59 * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower
60 * 1.25 Added Packing support
b805da74 61 * 1.5
1da177e4 62 */
4811fcb7
AR		 63
64#define KMSG_COMPONENT "claw"
65
1da177e4
LT		 66#include <asm/ccwdev.h>
67#include <asm/ccwgroup.h>
68#include <asm/debug.h>
69#include <asm/idals.h>
70#include <asm/io.h>
1977f032 71#include <linux/bitops.h>
1da177e4
LT		 72#include <linux/ctype.h>
73#include <linux/delay.h>
74#include <linux/errno.h>
75#include <linux/if_arp.h>
76#include <linux/init.h>
77#include <linux/interrupt.h>
78#include <linux/ip.h>
79#include <linux/kernel.h>
80#include <linux/module.h>
81#include <linux/netdevice.h>
82#include <linux/etherdevice.h>
83#include <linux/proc_fs.h>
84#include <linux/sched.h>
85#include <linux/signal.h>
86#include <linux/skbuff.h>
87#include <linux/slab.h>
88#include <linux/string.h>
89#include <linux/tcp.h>
90#include <linux/timer.h>
91#include <linux/types.h>
1da177e4
LT		 92
93#include "cu3088.h"
94#include "claw.h"
95
b805da74
AR		 96/*
97 CLAW uses the s390dbf file system see claw_trace and claw_setup
1da177e4
LT		 98*/
99
4811fcb7 100static char version[] __initdata = "CLAW driver";
2b67fc46 101static char debug_buffer[255];
1da177e4
LT		 102/**
103 * Debug Facility Stuff
104 */
105static debug_info_t *claw_dbf_setup;
106static debug_info_t *claw_dbf_trace;
107
108/**
109 * CLAW Debug Facility functions
110 */
111static void
112claw_unregister_debug_facility(void)
113{
114 if (claw_dbf_setup)
115 debug_unregister(claw_dbf_setup);
116 if (claw_dbf_trace)
117 debug_unregister(claw_dbf_trace);
118}
119
120static int
121claw_register_debug_facility(void)
122{
66a464db
MH		 123 claw_dbf_setup = debug_register("claw_setup", 2, 1, 8);
124 claw_dbf_trace = debug_register("claw_trace", 2, 2, 8);
1da177e4 125 if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) {
1da177e4
LT		 126 claw_unregister_debug_facility();
127 return -ENOMEM;
128 }
129 debug_register_view(claw_dbf_setup, &debug_hex_ascii_view);
130 debug_set_level(claw_dbf_setup, 2);
131 debug_register_view(claw_dbf_trace, &debug_hex_ascii_view);
132 debug_set_level(claw_dbf_trace, 2);
133 return 0;
134}
135
136static inline void
137claw_set_busy(struct net_device *dev)
138{
6951df34 139 ((struct claw_privbk *)dev->ml_priv)->tbusy = 1;
1da177e4
LT		 140 eieio();
141}
142
143static inline void
144claw_clear_busy(struct net_device *dev)
145{
6951df34 146 clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy));
1da177e4
LT		 147 netif_wake_queue(dev);
148 eieio();
149}
150
151static inline int
152claw_check_busy(struct net_device *dev)
153{
154 eieio();
6951df34 155 return ((struct claw_privbk *) dev->ml_priv)->tbusy;
1da177e4
LT		 156}
157
158static inline void
159claw_setbit_busy(int nr,struct net_device *dev)
160{
161 netif_stop_queue(dev);
6951df34 162 set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
1da177e4
LT		 163}
164
165static inline void
166claw_clearbit_busy(int nr,struct net_device *dev)
167{
6951df34 168 clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy));
1da177e4
LT		 169 netif_wake_queue(dev);
170}
171
172static inline int
173claw_test_and_setbit_busy(int nr,struct net_device *dev)
174{
175 netif_stop_queue(dev);
176 return test_and_set_bit(nr,
6951df34 177 (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy));
1da177e4
LT		 178}
179
180
181/* Functions for the DEV methods */
182
183static int claw_probe(struct ccwgroup_device *cgdev);
184static void claw_remove_device(struct ccwgroup_device *cgdev);
185static void claw_purge_skb_queue(struct sk_buff_head *q);
186static int claw_new_device(struct ccwgroup_device *cgdev);
187static int claw_shutdown_device(struct ccwgroup_device *cgdev);
188static int claw_tx(struct sk_buff *skb, struct net_device *dev);
189static int claw_change_mtu( struct net_device *dev, int new_mtu);
190static int claw_open(struct net_device *dev);
191static void claw_irq_handler(struct ccw_device *cdev,
192 unsigned long intparm, struct irb *irb);
193static void claw_irq_tasklet ( unsigned long data );
194static int claw_release(struct net_device *dev);
195static void claw_write_retry ( struct chbk * p_ch );
196static void claw_write_next ( struct chbk * p_ch );
197static void claw_timer ( struct chbk * p_ch );
198
199/* Functions */
200static int add_claw_reads(struct net_device *dev,
201 struct ccwbk* p_first, struct ccwbk* p_last);
4d284cac
HC		 202static void ccw_check_return_code (struct ccw_device *cdev, int return_code);
203static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense );
1da177e4
LT		 204static int find_link(struct net_device *dev, char *host_name, char *ws_name );
205static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid);
206static int init_ccw_bk(struct net_device *dev);
207static void probe_error( struct ccwgroup_device *cgdev);
208static struct net_device_stats *claw_stats(struct net_device *dev);
4d284cac 209static int pages_to_order_of_mag(int num_of_pages);
1da177e4 210static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr);
1da177e4 211/* sysfs Functions */
4811fcb7
AR		 212static ssize_t claw_hname_show(struct device *dev,
213 struct device_attribute *attr, char *buf);
214static ssize_t claw_hname_write(struct device *dev,
215 struct device_attribute *attr,
1da177e4 216 const char *buf, size_t count);
4811fcb7
AR		 217static ssize_t claw_adname_show(struct device *dev,
218 struct device_attribute *attr, char *buf);
219static ssize_t claw_adname_write(struct device *dev,
220 struct device_attribute *attr,
1da177e4 221 const char *buf, size_t count);
4811fcb7
AR		 222static ssize_t claw_apname_show(struct device *dev,
223 struct device_attribute *attr, char *buf);
224static ssize_t claw_apname_write(struct device *dev,
225 struct device_attribute *attr,
1da177e4 226 const char *buf, size_t count);
4811fcb7
AR		 227static ssize_t claw_wbuff_show(struct device *dev,
228 struct device_attribute *attr, char *buf);
229static ssize_t claw_wbuff_write(struct device *dev,
230 struct device_attribute *attr,
1da177e4 231 const char *buf, size_t count);
4811fcb7
AR		 232static ssize_t claw_rbuff_show(struct device *dev,
233 struct device_attribute *attr, char *buf);
234static ssize_t claw_rbuff_write(struct device *dev,
235 struct device_attribute *attr,
1da177e4
LT		 236 const char *buf, size_t count);
237static int claw_add_files(struct device *dev);
238static void claw_remove_files(struct device *dev);
239
240/* Functions for System Validate */
241static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw);
242static int claw_send_control(struct net_device *dev, __u8 type, __u8 link,
243 __u8 correlator, __u8 rc , char *local_name, char *remote_name);
244static int claw_snd_conn_req(struct net_device *dev, __u8 link);
245static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl);
246static int claw_snd_sys_validate_rsp(struct net_device *dev,
247 struct clawctl * p_ctl, __u32 return_code);
248static int claw_strt_conn_req(struct net_device *dev );
b805da74
AR		 249static void claw_strt_read(struct net_device *dev, int lock);
250static void claw_strt_out_IO(struct net_device *dev);
251static void claw_free_wrt_buf(struct net_device *dev);
1da177e4
LT		 252
253/* Functions for unpack reads */
b805da74 254static void unpack_read(struct net_device *dev);
1da177e4
LT		 255
256/* ccwgroup table */
257
258static struct ccwgroup_driver claw_group_driver = {
259 .owner = THIS_MODULE,
260 .name = "claw",
261 .max_slaves = 2,
262 .driver_id = 0xC3D3C1E6,
263 .probe = claw_probe,
264 .remove = claw_remove_device,
265 .set_online = claw_new_device,
266 .set_offline = claw_shutdown_device,
267};
268
269/*
1da177e4
LT		 270* Key functions
271*/
272
273/*----------------------------------------------------------------*
274 * claw_probe *
275 * this function is called for each CLAW device. *
276 *----------------------------------------------------------------*/
277static int
278claw_probe(struct ccwgroup_device *cgdev)
279{
280 int rc;
281 struct claw_privbk *privptr=NULL;
282
b805da74 283 CLAW_DBF_TEXT(2, setup, "probe");
1da177e4
LT		 284 if (!get_device(&cgdev->dev))
285 return -ENODEV;
88abaab4 286 privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL);
2b356b46 287 cgdev->dev.driver_data = privptr;
1da177e4
LT		 288 if (privptr == NULL) {
289 probe_error(cgdev);
290 put_device(&cgdev->dev);
b805da74 291 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
1da177e4
LT		 292 return -ENOMEM;
293 }
dd00cc48
YP		 294 privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
295 privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
1da177e4
LT		 296 if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
297 probe_error(cgdev);
298 put_device(&cgdev->dev);
b805da74 299 CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM);
1da177e4
LT		 300 return -ENOMEM;
301 }
1da177e4
LT		 302 memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
303 memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
304 memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
305 privptr->p_env->packing = 0;
306 privptr->p_env->write_buffers = 5;
307 privptr->p_env->read_buffers = 5;
308 privptr->p_env->read_size = CLAW_FRAME_SIZE;
309 privptr->p_env->write_size = CLAW_FRAME_SIZE;
310 rc = claw_add_files(&cgdev->dev);
311 if (rc) {
312 probe_error(cgdev);
313 put_device(&cgdev->dev);
4811fcb7
AR		 314 dev_err(&cgdev->dev, "Creating the /proc files for a new"
315 " CLAW device failed\n");
b805da74 316 CLAW_DBF_TEXT_(2, setup, "probex%d", rc);
1da177e4
LT		 317 return rc;
318 }
1da177e4
LT		 319 privptr->p_env->p_priv = privptr;
320 cgdev->cdev[0]->handler = claw_irq_handler;
321 cgdev->cdev[1]->handler = claw_irq_handler;
b805da74 322 CLAW_DBF_TEXT(2, setup, "prbext 0");
1da177e4
LT		 323
324 return 0;
325} /* end of claw_probe */
326
327/*-------------------------------------------------------------------*
328 * claw_tx *
329 *-------------------------------------------------------------------*/
330
331static int
332claw_tx(struct sk_buff *skb, struct net_device *dev)
333{
334 int rc;
6951df34 335 struct claw_privbk *privptr = dev->ml_priv;
1da177e4
LT		 336 unsigned long saveflags;
337 struct chbk *p_ch;
338
b805da74 339 CLAW_DBF_TEXT(4, trace, "claw_tx");
1da177e4
LT		 340 p_ch=&privptr->channel[WRITE];
341 if (skb == NULL) {
1da177e4 342 privptr->stats.tx_dropped++;
b805da74
AR		 343 privptr->stats.tx_errors++;
344 CLAW_DBF_TEXT_(2, trace, "clawtx%d", -EIO);
1da177e4
LT		 345 return -EIO;
346 }
1da177e4
LT		 347 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
348 rc=claw_hw_tx( skb, dev, 1 );
349 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
b805da74 350 CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc);
8f0c40d4
UB		 351 if (rc)
352 rc = NETDEV_TX_BUSY;
1da177e4
LT		 353 return rc;
354} /* end of claw_tx */
355
356/*------------------------------------------------------------------*
357 * pack the collect queue into an skb and return it *
358 * If not packing just return the top skb from the queue *
359 *------------------------------------------------------------------*/
360
361static struct sk_buff *
362claw_pack_skb(struct claw_privbk *privptr)
363{
364 struct sk_buff *new_skb,*held_skb;
365 struct chbk *p_ch = &privptr->channel[WRITE];
366 struct claw_env *p_env = privptr->p_env;
367 int pkt_cnt,pk_ind,so_far;
368
369 new_skb = NULL; /* assume no dice */
370 pkt_cnt = 0;
b805da74 371 CLAW_DBF_TEXT(4, trace, "PackSKBe");
b03efcfb 372 if (!skb_queue_empty(&p_ch->collect_queue)) {
1da177e4
LT		 373 /* some data */
374 held_skb = skb_dequeue(&p_ch->collect_queue);
1da177e4 375 if (held_skb)
8e84c801 376 dev_kfree_skb_any(held_skb);
1da177e4
LT		 377 else
378 return NULL;
8e84c801
FP		 379 if (p_env->packing != DO_PACKED)
380 return held_skb;
1da177e4
LT		 381 /* get a new SKB we will pack at least one */
382 new_skb = dev_alloc_skb(p_env->write_size);
383 if (new_skb == NULL) {
384 atomic_inc(&held_skb->users);
385 skb_queue_head(&p_ch->collect_queue,held_skb);
386 return NULL;
387 }
388 /* we have packed packet and a place to put it */
389 pk_ind = 1;
390 so_far = 0;
391 new_skb->cb[1] = 'P'; /* every skb on queue has pack header */
392 while ((pk_ind) && (held_skb != NULL)) {
393 if (held_skb->len+so_far <= p_env->write_size-8) {
394 memcpy(skb_put(new_skb,held_skb->len),
395 held_skb->data,held_skb->len);
396 privptr->stats.tx_packets++;
397 so_far += held_skb->len;
398 pkt_cnt++;
8e84c801 399 dev_kfree_skb_any(held_skb);
1da177e4
LT		 400 held_skb = skb_dequeue(&p_ch->collect_queue);
401 if (held_skb)
402 atomic_dec(&held_skb->users);
403 } else {
404 pk_ind = 0;
405 atomic_inc(&held_skb->users);
406 skb_queue_head(&p_ch->collect_queue,held_skb);
407 }
408 }
1da177e4 409 }
b805da74 410 CLAW_DBF_TEXT(4, trace, "PackSKBx");
1da177e4
LT		 411 return new_skb;
412}
413
414/*-------------------------------------------------------------------*
415 * claw_change_mtu *
416 * *
417 *-------------------------------------------------------------------*/
418
419static int
420claw_change_mtu(struct net_device *dev, int new_mtu)
421{
6951df34 422 struct claw_privbk *privptr = dev->ml_priv;
1da177e4 423 int buff_size;
b805da74 424 CLAW_DBF_TEXT(4, trace, "setmtu");
1da177e4
LT		 425 buff_size = privptr->p_env->write_size;
426 if ((new_mtu < 60) || (new_mtu > buff_size)) {
1da177e4
LT		 427 return -EINVAL;
428 }
429 dev->mtu = new_mtu;
1da177e4
LT		 430 return 0;
431} /* end of claw_change_mtu */
432
433
434/*-------------------------------------------------------------------*
435 * claw_open *
436 * *
437 *-------------------------------------------------------------------*/
438static int
439claw_open(struct net_device *dev)
440{
441
442 int rc;
443 int i;
444 unsigned long saveflags=0;
445 unsigned long parm;
446 struct claw_privbk *privptr;
447 DECLARE_WAITQUEUE(wait, current);
448 struct timer_list timer;
449 struct ccwbk *p_buf;
450
b805da74 451 CLAW_DBF_TEXT(4, trace, "open");
6951df34 452 privptr = (struct claw_privbk *)dev->ml_priv;
1da177e4
LT		 453 /* allocate and initialize CCW blocks */
454 if (privptr->buffs_alloc == 0) {
455 rc=init_ccw_bk(dev);
456 if (rc) {
b805da74 457 CLAW_DBF_TEXT(2, trace, "openmem");
1da177e4
LT		 458 return -ENOMEM;
459 }
460 }
461 privptr->system_validate_comp=0;
462 privptr->release_pend=0;
463 if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
464 privptr->p_env->read_size=DEF_PACK_BUFSIZE;
465 privptr->p_env->write_size=DEF_PACK_BUFSIZE;
466 privptr->p_env->packing=PACKING_ASK;
467 } else {
468 privptr->p_env->packing=0;
469 privptr->p_env->read_size=CLAW_FRAME_SIZE;
470 privptr->p_env->write_size=CLAW_FRAME_SIZE;
471 }
472 claw_set_busy(dev);
473 tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet,
474 (unsigned long) &privptr->channel[READ]);
475 for ( i = 0; i < 2; i++) {
b805da74 476 CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i);
1da177e4
LT		 477 init_waitqueue_head(&privptr->channel[i].wait);
478 /* skb_queue_head_init(&p_ch->io_queue); */
479 if (i == WRITE)
480 skb_queue_head_init(
481 &privptr->channel[WRITE].collect_queue);
482 privptr->channel[i].flag_a = 0;
483 privptr->channel[i].IO_active = 0;
484 privptr->channel[i].flag &= ~CLAW_TIMER;
485 init_timer(&timer);
486 timer.function = (void *)claw_timer;
487 timer.data = (unsigned long)(&privptr->channel[i]);
488 timer.expires = jiffies + 15*HZ;
489 add_timer(&timer);
490 spin_lock_irqsave(get_ccwdev_lock(
491 privptr->channel[i].cdev), saveflags);
492 parm = (unsigned long) &privptr->channel[i];
493 privptr->channel[i].claw_state = CLAW_START_HALT_IO;
494 rc = 0;
495 add_wait_queue(&privptr->channel[i].wait, &wait);
496 rc = ccw_device_halt(
497 (struct ccw_device *)privptr->channel[i].cdev,parm);
498 set_current_state(TASK_INTERRUPTIBLE);
499 spin_unlock_irqrestore(
500 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
501 schedule();
502 set_current_state(TASK_RUNNING);
503 remove_wait_queue(&privptr->channel[i].wait, &wait);
504 if(rc != 0)
505 ccw_check_return_code(privptr->channel[i].cdev, rc);
506 if((privptr->channel[i].flag & CLAW_TIMER) == 0x00)
507 del_timer(&timer);
508 }
509 if ((((privptr->channel[READ].last_dstat |
510 privptr->channel[WRITE].last_dstat) &
511 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) ||
512 (((privptr->channel[READ].flag |
513 privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) {
4811fcb7
AR		 514 dev_info(&privptr->channel[READ].cdev->dev,
515 "%s: remote side is not ready\n", dev->name);
b805da74 516 CLAW_DBF_TEXT(2, trace, "notrdy");
1da177e4
LT		 517
518 for ( i = 0; i < 2; i++) {
519 spin_lock_irqsave(
520 get_ccwdev_lock(privptr->channel[i].cdev),
521 saveflags);
522 parm = (unsigned long) &privptr->channel[i];
523 privptr->channel[i].claw_state = CLAW_STOP;
524 rc = ccw_device_halt(
525 (struct ccw_device *)&privptr->channel[i].cdev,
526 parm);
527 spin_unlock_irqrestore(
528 get_ccwdev_lock(privptr->channel[i].cdev),
529 saveflags);
530 if (rc != 0) {
531 ccw_check_return_code(
532 privptr->channel[i].cdev, rc);
533 }
534 }
535 free_pages((unsigned long)privptr->p_buff_ccw,
536 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
537 if (privptr->p_env->read_size < PAGE_SIZE) {
538 free_pages((unsigned long)privptr->p_buff_read,
539 (int)pages_to_order_of_mag(
540 privptr->p_buff_read_num));
541 }
542 else {
543 p_buf=privptr->p_read_active_first;
544 while (p_buf!=NULL) {
545 free_pages((unsigned long)p_buf->p_buffer,
546 (int)pages_to_order_of_mag(
547 privptr->p_buff_pages_perread ));
548 p_buf=p_buf->next;
549 }
550 }
551 if (privptr->p_env->write_size < PAGE_SIZE ) {
552 free_pages((unsigned long)privptr->p_buff_write,
553 (int)pages_to_order_of_mag(
554 privptr->p_buff_write_num));
555 }
556 else {
557 p_buf=privptr->p_write_active_first;
558 while (p_buf!=NULL) {
559 free_pages((unsigned long)p_buf->p_buffer,
560 (int)pages_to_order_of_mag(
561 privptr->p_buff_pages_perwrite ));
562 p_buf=p_buf->next;
563 }
564 }
565 privptr->buffs_alloc = 0;
566 privptr->channel[READ].flag= 0x00;
567 privptr->channel[WRITE].flag = 0x00;
568 privptr->p_buff_ccw=NULL;
569 privptr->p_buff_read=NULL;
570 privptr->p_buff_write=NULL;
571 claw_clear_busy(dev);
b805da74 572 CLAW_DBF_TEXT(2, trace, "open EIO");
1da177e4
LT		 573 return -EIO;
574 }
575
576 /* Send SystemValidate command */
577
578 claw_clear_busy(dev);
b805da74 579 CLAW_DBF_TEXT(4, trace, "openok");
1da177e4
LT		 580 return 0;
581} /* end of claw_open */
582
583/*-------------------------------------------------------------------*
584* *
585* claw_irq_handler *
586* *
587*--------------------------------------------------------------------*/
588static void
589claw_irq_handler(struct ccw_device *cdev,
590 unsigned long intparm, struct irb *irb)
591{
592 struct chbk *p_ch = NULL;
593 struct claw_privbk *privptr = NULL;
594 struct net_device *dev = NULL;
595 struct claw_env *p_env;
596 struct chbk *p_ch_r=NULL;
597
b805da74 598 CLAW_DBF_TEXT(4, trace, "clawirq");
1da177e4
LT		 599 /* Bypass all 'unsolicited interrupts' */
600 if (!cdev->dev.driver_data) {
4811fcb7
AR		 601 dev_warn(&cdev->dev, "An uninitialized CLAW device received an"
602 " IRQ, c-%02x d-%02x\n",
603 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);
b805da74 604 CLAW_DBF_TEXT(2, trace, "badirq");
1da177e4
LT		 605 return;
606 }
607 privptr = (struct claw_privbk *)cdev->dev.driver_data;
608
609 /* Try to extract channel from driver data. */
610 if (privptr->channel[READ].cdev == cdev)
611 p_ch = &privptr->channel[READ];
612 else if (privptr->channel[WRITE].cdev == cdev)
613 p_ch = &privptr->channel[WRITE];
614 else {
4811fcb7 615 dev_warn(&cdev->dev, "The device is not a CLAW device\n");
b805da74 616 CLAW_DBF_TEXT(2, trace, "badchan");
1da177e4
LT		 617 return;
618 }
b805da74 619 CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag);
1da177e4
LT		 620
621 dev = (struct net_device *) (p_ch->ndev);
622 p_env=privptr->p_env;
623
1da177e4
LT		 624 /* Copy interruption response block. */
625 memcpy(p_ch->irb, irb, sizeof(struct irb));
626
b805da74 627 /* Check for good subchannel return code, otherwise info message */
23d805b6 628 if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) {
4811fcb7
AR		 629 dev_info(&cdev->dev,
630 "%s: subchannel check for device: %04x -"
1da177e4
LT		 631 " Sch Stat %02x Dev Stat %02x CPA - %04x\n",
632 dev->name, p_ch->devno,
23d805b6
PO		 633 irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
634 irb->scsw.cmd.cpa);
b805da74 635 CLAW_DBF_TEXT(2, trace, "chanchk");
1da177e4
LT		 636 /* return; */
637 }
638
639 /* Check the reason-code of a unit check */
23d805b6 640 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
1da177e4 641 ccw_check_unit_check(p_ch, irb->ecw[0]);
1da177e4
LT		 642
643 /* State machine to bring the connection up, down and to restart */
23d805b6 644 p_ch->last_dstat = irb->scsw.cmd.dstat;
1da177e4
LT		 645
646 switch (p_ch->claw_state) {
b805da74
AR		 647 case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */
648 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
649 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
650 (p_ch->irb->scsw.cmd.stctl ==
651 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND))))
652 return;
653 wake_up(&p_ch->wait); /* wake up claw_release */
654 CLAW_DBF_TEXT(4, trace, "stop");
655 return;
656 case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */
657 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
658 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
659 (p_ch->irb->scsw.cmd.stctl ==
660 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
661 CLAW_DBF_TEXT(4, trace, "haltio");
662 return;
663 }
664 if (p_ch->flag == CLAW_READ) {
665 p_ch->claw_state = CLAW_START_READ;
666 wake_up(&p_ch->wait); /* wake claw_open (READ)*/
667 } else if (p_ch->flag == CLAW_WRITE) {
668 p_ch->claw_state = CLAW_START_WRITE;
4811fcb7 669 /* send SYSTEM_VALIDATE */
b805da74
AR		 670 claw_strt_read(dev, LOCK_NO);
671 claw_send_control(dev,
672 SYSTEM_VALIDATE_REQUEST,
673 0, 0, 0,
674 p_env->host_name,
675 p_env->adapter_name);
676 } else {
4811fcb7
AR		 677 dev_warn(&cdev->dev, "The CLAW device received"
678 " an unexpected IRQ, "
679 "c-%02x d-%02x\n",
b805da74
AR		 680 irb->scsw.cmd.cstat,
681 irb->scsw.cmd.dstat);
682 return;
683 }
684 CLAW_DBF_TEXT(4, trace, "haltio");
685 return;
686 case CLAW_START_READ:
687 CLAW_DBF_TEXT(4, trace, "ReadIRQ");
688 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
689 clear_bit(0, (void *)&p_ch->IO_active);
690 if ((p_ch->irb->ecw[0] & 0x41) == 0x41 ||
691 (p_ch->irb->ecw[0] & 0x40) == 0x40 ||
692 (p_ch->irb->ecw[0]) == 0) {
693 privptr->stats.rx_errors++;
4811fcb7
AR		 694 dev_info(&cdev->dev,
695 "%s: Restart is required after remote "
b805da74
AR		 696 "side recovers \n",
697 dev->name);
698 }
699 CLAW_DBF_TEXT(4, trace, "notrdy");
700 return;
701 }
702 if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) &&
703 (p_ch->irb->scsw.cmd.dstat == 0)) {
704 if (test_and_set_bit(CLAW_BH_ACTIVE,
705 (void *)&p_ch->flag_a) == 0)
706 tasklet_schedule(&p_ch->tasklet);
1da177e4 707 else
b805da74
AR		 708 CLAW_DBF_TEXT(4, trace, "PCINoBH");
709 CLAW_DBF_TEXT(4, trace, "PCI_read");
710 return;
711 }
712 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
713 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
714 (p_ch->irb->scsw.cmd.stctl ==
715 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
716 CLAW_DBF_TEXT(4, trace, "SPend_rd");
717 return;
718 }
719 clear_bit(0, (void *)&p_ch->IO_active);
720 claw_clearbit_busy(TB_RETRY, dev);
721 if (test_and_set_bit(CLAW_BH_ACTIVE,
722 (void *)&p_ch->flag_a) == 0)
723 tasklet_schedule(&p_ch->tasklet);
724 else
725 CLAW_DBF_TEXT(4, trace, "RdBHAct");
726 CLAW_DBF_TEXT(4, trace, "RdIRQXit");
727 return;
728 case CLAW_START_WRITE:
729 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
4811fcb7
AR		 730 dev_info(&cdev->dev,
731 "%s: Unit Check Occured in "
b805da74
AR		 732 "write channel\n", dev->name);
733 clear_bit(0, (void *)&p_ch->IO_active);
734 if (p_ch->irb->ecw[0] & 0x80) {
4811fcb7
AR		 735 dev_info(&cdev->dev,
736 "%s: Resetting Event "
b805da74
AR		 737 "occurred:\n", dev->name);
738 init_timer(&p_ch->timer);
739 p_ch->timer.function =
740 (void *)claw_write_retry;
741 p_ch->timer.data = (unsigned long)p_ch;
742 p_ch->timer.expires = jiffies + 10*HZ;
743 add_timer(&p_ch->timer);
4811fcb7
AR		 744 dev_info(&cdev->dev,
745 "%s: write connection "
b805da74
AR		 746 "restarting\n", dev->name);
747 }
748 CLAW_DBF_TEXT(4, trace, "rstrtwrt");
749 return;
750 }
751 if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) {
752 clear_bit(0, (void *)&p_ch->IO_active);
4811fcb7
AR		 753 dev_info(&cdev->dev,
754 "%s: Unit Exception "
755 "occurred in write channel\n",
756 dev->name);
b805da74
AR		 757 }
758 if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) ||
759 (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) ||
760 (p_ch->irb->scsw.cmd.stctl ==
761 (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) {
762 CLAW_DBF_TEXT(4, trace, "writeUE");
763 return;
764 }
765 clear_bit(0, (void *)&p_ch->IO_active);
766 if (claw_test_and_setbit_busy(TB_TX, dev) == 0) {
767 claw_write_next(p_ch);
768 claw_clearbit_busy(TB_TX, dev);
769 claw_clear_busy(dev);
770 }
771 p_ch_r = (struct chbk *)&privptr->channel[READ];
772 if (test_and_set_bit(CLAW_BH_ACTIVE,
773 (void *)&p_ch_r->flag_a) == 0)
774 tasklet_schedule(&p_ch_r->tasklet);
775 CLAW_DBF_TEXT(4, trace, "StWtExit");
776 return;
777 default:
4811fcb7
AR		 778 dev_warn(&cdev->dev,
779 "The CLAW device for %s received an unexpected IRQ\n",
780 dev->name);
b805da74
AR		 781 CLAW_DBF_TEXT(2, trace, "badIRQ");
782 return;
1da177e4
LT		 783 }
784
785} /* end of claw_irq_handler */
786
787
788/*-------------------------------------------------------------------*
789* claw_irq_tasklet *
790* *
791*--------------------------------------------------------------------*/
792static void
793claw_irq_tasklet ( unsigned long data )
794{
795 struct chbk * p_ch;
796 struct net_device *dev;
797 struct claw_privbk * privptr;
798
799 p_ch = (struct chbk *) data;
800 dev = (struct net_device *)p_ch->ndev;
b805da74 801 CLAW_DBF_TEXT(4, trace, "IRQtask");
6951df34 802 privptr = (struct claw_privbk *)dev->ml_priv;
1da177e4
LT		 803 unpack_read(dev);
804 clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a);
b805da74 805 CLAW_DBF_TEXT(4, trace, "TskletXt");
1da177e4
LT		 806 return;
807} /* end of claw_irq_bh */
808
809/*-------------------------------------------------------------------*
810* claw_release *
811* *
812*--------------------------------------------------------------------*/
813static int
814claw_release(struct net_device *dev)
815{
816 int rc;
817 int i;
818 unsigned long saveflags;
819 unsigned long parm;
820 struct claw_privbk *privptr;
821 DECLARE_WAITQUEUE(wait, current);
822 struct ccwbk* p_this_ccw;
823 struct ccwbk* p_buf;
824
825 if (!dev)
826 return 0;
6951df34 827 privptr = (struct claw_privbk *)dev->ml_priv;
1da177e4
LT		 828 if (!privptr)
829 return 0;
b805da74 830 CLAW_DBF_TEXT(4, trace, "release");
1da177e4
LT		 831 privptr->release_pend=1;
832 claw_setbit_busy(TB_STOP,dev);
833 for ( i = 1; i >=0 ; i--) {
834 spin_lock_irqsave(
835 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
836 /* del_timer(&privptr->channel[READ].timer); */
837 privptr->channel[i].claw_state = CLAW_STOP;
838 privptr->channel[i].IO_active = 0;
839 parm = (unsigned long) &privptr->channel[i];
840 if (i == WRITE)
841 claw_purge_skb_queue(
842 &privptr->channel[WRITE].collect_queue);
843 rc = ccw_device_halt (privptr->channel[i].cdev, parm);
844 if (privptr->system_validate_comp==0x00) /* never opened? */
845 init_waitqueue_head(&privptr->channel[i].wait);
846 add_wait_queue(&privptr->channel[i].wait, &wait);
847 set_current_state(TASK_INTERRUPTIBLE);
848 spin_unlock_irqrestore(
849 get_ccwdev_lock(privptr->channel[i].cdev), saveflags);
850 schedule();
851 set_current_state(TASK_RUNNING);
852 remove_wait_queue(&privptr->channel[i].wait, &wait);
853 if (rc != 0) {
854 ccw_check_return_code(privptr->channel[i].cdev, rc);
855 }
856 }
857 if (privptr->pk_skb != NULL) {
8e84c801 858 dev_kfree_skb_any(privptr->pk_skb);
1da177e4
LT		 859 privptr->pk_skb = NULL;
860 }
861 if(privptr->buffs_alloc != 1) {
b805da74 862 CLAW_DBF_TEXT(4, trace, "none2fre");
1da177e4
LT		 863 return 0;
864 }
b805da74 865 CLAW_DBF_TEXT(4, trace, "freebufs");
1da177e4
LT		 866 if (privptr->p_buff_ccw != NULL) {
867 free_pages((unsigned long)privptr->p_buff_ccw,
868 (int)pages_to_order_of_mag(privptr->p_buff_ccw_num));
869 }
b805da74 870 CLAW_DBF_TEXT(4, trace, "freeread");
1da177e4
LT		 871 if (privptr->p_env->read_size < PAGE_SIZE) {
872 if (privptr->p_buff_read != NULL) {
873 free_pages((unsigned long)privptr->p_buff_read,
874 (int)pages_to_order_of_mag(privptr->p_buff_read_num));
875 }
876 }
877 else {
878 p_buf=privptr->p_read_active_first;
879 while (p_buf!=NULL) {
880 free_pages((unsigned long)p_buf->p_buffer,
881 (int)pages_to_order_of_mag(
882 privptr->p_buff_pages_perread ));
883 p_buf=p_buf->next;
884 }
885 }
b805da74 886 CLAW_DBF_TEXT(4, trace, "freewrit");
1da177e4
LT		 887 if (privptr->p_env->write_size < PAGE_SIZE ) {
888 free_pages((unsigned long)privptr->p_buff_write,
889 (int)pages_to_order_of_mag(privptr->p_buff_write_num));
890 }
891 else {
892 p_buf=privptr->p_write_active_first;
893 while (p_buf!=NULL) {
894 free_pages((unsigned long)p_buf->p_buffer,
895 (int)pages_to_order_of_mag(
896 privptr->p_buff_pages_perwrite ));
897 p_buf=p_buf->next;
898 }
899 }
b805da74 900 CLAW_DBF_TEXT(4, trace, "clearptr");
1da177e4
LT		 901 privptr->buffs_alloc = 0;
902 privptr->p_buff_ccw=NULL;
903 privptr->p_buff_read=NULL;
904 privptr->p_buff_write=NULL;
905 privptr->system_validate_comp=0;
906 privptr->release_pend=0;
907 /* Remove any writes that were pending and reset all reads */
908 p_this_ccw=privptr->p_read_active_first;
909 while (p_this_ccw!=NULL) {
910 p_this_ccw->header.length=0xffff;
911 p_this_ccw->header.opcode=0xff;
912 p_this_ccw->header.flag=0x00;
913 p_this_ccw=p_this_ccw->next;
914 }
915
916 while (privptr->p_write_active_first!=NULL) {
917 p_this_ccw=privptr->p_write_active_first;
918 p_this_ccw->header.flag=CLAW_PENDING;
919 privptr->p_write_active_first=p_this_ccw->next;
920 p_this_ccw->next=privptr->p_write_free_chain;
921 privptr->p_write_free_chain=p_this_ccw;
922 ++privptr->write_free_count;
923 }
924 privptr->p_write_active_last=NULL;
925 privptr->mtc_logical_link = -1;
926 privptr->mtc_skipping = 1;
927 privptr->mtc_offset=0;
928
929 if (((privptr->channel[READ].last_dstat |
930 privptr->channel[WRITE].last_dstat) &
931 ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) {
4811fcb7
AR		 932 dev_warn(&privptr->channel[READ].cdev->dev,
933 "Deactivating %s completed with incorrect"
934 " subchannel status "
935 "(read %02x, write %02x)\n",
1da177e4
LT		 936 dev->name,
937 privptr->channel[READ].last_dstat,
938 privptr->channel[WRITE].last_dstat);
b805da74 939 CLAW_DBF_TEXT(2, trace, "badclose");
1da177e4 940 }
b805da74 941 CLAW_DBF_TEXT(4, trace, "rlsexit");
1da177e4
LT		 942 return 0;
943} /* end of claw_release */
944
1da177e4
LT		 945/*-------------------------------------------------------------------*
946* claw_write_retry *
947* *
948*--------------------------------------------------------------------*/
949
950static void
951claw_write_retry ( struct chbk *p_ch )
952{
953
954 struct net_device *dev=p_ch->ndev;
955
b805da74 956 CLAW_DBF_TEXT(4, trace, "w_retry");
1da177e4 957 if (p_ch->claw_state == CLAW_STOP) {
1da177e4
LT		 958 return;
959 }
1da177e4 960 claw_strt_out_IO( dev );
b805da74 961 CLAW_DBF_TEXT(4, trace, "rtry_xit");
1da177e4
LT		 962 return;
963} /* end of claw_write_retry */
964
965
966/*-------------------------------------------------------------------*
967* claw_write_next *
968* *
969*--------------------------------------------------------------------*/
970
971static void
972claw_write_next ( struct chbk * p_ch )
973{
974
975 struct net_device *dev;
976 struct claw_privbk *privptr=NULL;
977 struct sk_buff *pk_skb;
978 int rc;
979
b805da74 980 CLAW_DBF_TEXT(4, trace, "claw_wrt");
1da177e4
LT		 981 if (p_ch->claw_state == CLAW_STOP)
982 return;
983 dev = (struct net_device *) p_ch->ndev;
6951df34 984 privptr = (struct claw_privbk *) dev->ml_priv;
1da177e4
LT		 985 claw_free_wrt_buf( dev );
986 if ((privptr->write_free_count > 0) &&
b03efcfb 987 !skb_queue_empty(&p_ch->collect_queue)) {
1da177e4
LT		 988 pk_skb = claw_pack_skb(privptr);
989 while (pk_skb != NULL) {
990 rc = claw_hw_tx( pk_skb, dev,1);
991 if (privptr->write_free_count > 0) {
992 pk_skb = claw_pack_skb(privptr);
993 } else
994 pk_skb = NULL;
995 }
996 }
997 if (privptr->p_write_active_first!=NULL) {
998 claw_strt_out_IO(dev);
999 }
1da177e4
LT		 1000 return;
1001} /* end of claw_write_next */
1002
1003/*-------------------------------------------------------------------*
1004* *
1005* claw_timer *
1006*--------------------------------------------------------------------*/
1007
1008static void
1009claw_timer ( struct chbk * p_ch )
1010{
b805da74 1011 CLAW_DBF_TEXT(4, trace, "timer");
1da177e4
LT		 1012 p_ch->flag |= CLAW_TIMER;
1013 wake_up(&p_ch->wait);
1da177e4
LT		 1014 return;
1015} /* end of claw_timer */
1016
1da177e4
LT		 1017/*
1018*
1019* functions
1020*/
1021
1022
1023/*-------------------------------------------------------------------*
1024* *
1025* pages_to_order_of_mag *
1026* *
1027* takes a number of pages from 1 to 512 and returns the *
1028* log(num_pages)/log(2) get_free_pages() needs a base 2 order *
1029* of magnitude get_free_pages() has an upper order of 9 *
1030*--------------------------------------------------------------------*/
1031
4d284cac 1032static int
1da177e4
LT		 1033pages_to_order_of_mag(int num_of_pages)
1034{
1035 int order_of_mag=1; /* assume 2 pages */
1036 int nump=2;
b805da74
AR		 1037
1038 CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages);
1da177e4
LT		 1039 if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */
1040 /* 512 pages = 2Meg on 4k page systems */
1041 if (num_of_pages >= 512) {return 9; }
1042 /* we have two or more pages order is at least 1 */
1043 for (nump=2 ;nump <= 512;nump*=2) {
1044 if (num_of_pages <= nump)
1045 break;
1046 order_of_mag +=1;
1047 }
1048 if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */
b805da74 1049 CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag);
1da177e4
LT		 1050 return order_of_mag;
1051}
1052
1053/*-------------------------------------------------------------------*
1054* *
1055* add_claw_reads *
1056* *
1057*--------------------------------------------------------------------*/
1058static int
1059add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
1060 struct ccwbk* p_last)
1061{
1062 struct claw_privbk *privptr;
1063 struct ccw1 temp_ccw;
1064 struct endccw * p_end;
b805da74 1065 CLAW_DBF_TEXT(4, trace, "addreads");
6951df34 1066 privptr = dev->ml_priv;
1da177e4
LT		 1067 p_end = privptr->p_end_ccw;
1068
1069 /* first CCW and last CCW contains a new set of read channel programs
1070 * to apend the running channel programs
1071 */
1072 if ( p_first==NULL) {
b805da74 1073 CLAW_DBF_TEXT(4, trace, "addexit");
1da177e4
LT		 1074 return 0;
1075 }
1076
1077 /* set up ending CCW sequence for this segment */
1078 if (p_end->read1) {
1079 p_end->read1=0x00; /* second ending CCW is now active */
1080 /* reset ending CCWs and setup TIC CCWs */
1081 p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1082 p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1083 p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1);
1084 p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1);
1085 p_end->read2_nop2.cda=0;
1086 p_end->read2_nop2.count=1;
1087 }
1088 else {
1089 p_end->read1=0x01; /* first ending CCW is now active */
1090 /* reset ending CCWs and setup TIC CCWs */
1091 p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1092 p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1093 p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1);
1094 p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1);
1095 p_end->read1_nop2.cda=0;
1096 p_end->read1_nop2.count=1;
1097 }
1098
1099 if ( privptr-> p_read_active_first ==NULL ) {
4811fcb7
AR		 1100 privptr->p_read_active_first = p_first; /* set new first */
1101 privptr->p_read_active_last = p_last; /* set new last */
1da177e4
LT		 1102 }
1103 else {
1104
1da177e4
LT		 1105 /* set up TIC ccw */
1106 temp_ccw.cda= (__u32)__pa(&p_first->read);
1107 temp_ccw.count=0;
1108 temp_ccw.flags=0;
1109 temp_ccw.cmd_code = CCW_CLAW_CMD_TIC;
1110
1111
1112 if (p_end->read1) {
1113
1114 /* first set of CCW's is chained to the new read */
1115 /* chain, so the second set is chained to the active chain. */
1116 /* Therefore modify the second set to point to the new */
1117 /* read chain set up TIC CCWs */
1118 /* make sure we update the CCW so channel doesn't fetch it */
1119 /* when it's only half done */
1120 memcpy( &p_end->read2_nop2, &temp_ccw ,
1121 sizeof(struct ccw1));
1122 privptr->p_read_active_last->r_TIC_1.cda=
1123 (__u32)__pa(&p_first->read);
1124 privptr->p_read_active_last->r_TIC_2.cda=
1125 (__u32)__pa(&p_first->read);
1126 }
1127 else {
1128 /* make sure we update the CCW so channel doesn't */
1129 /* fetch it when it is only half done */
1130 memcpy( &p_end->read1_nop2, &temp_ccw ,
1131 sizeof(struct ccw1));
1132 privptr->p_read_active_last->r_TIC_1.cda=
1133 (__u32)__pa(&p_first->read);
1134 privptr->p_read_active_last->r_TIC_2.cda=
1135 (__u32)__pa(&p_first->read);
1136 }
4811fcb7 1137 /* chain in new set of blocks */
1da177e4
LT		 1138 privptr->p_read_active_last->next = p_first;
1139 privptr->p_read_active_last=p_last;
1140 } /* end of if ( privptr-> p_read_active_first ==NULL) */
b805da74 1141 CLAW_DBF_TEXT(4, trace, "addexit");
1da177e4
LT		 1142 return 0;
1143} /* end of add_claw_reads */
1144
1145/*-------------------------------------------------------------------*
1146 * ccw_check_return_code *
1147 * *
1148 *-------------------------------------------------------------------*/
1149
4d284cac 1150static void
1da177e4
LT		 1151ccw_check_return_code(struct ccw_device *cdev, int return_code)
1152{
b805da74 1153 CLAW_DBF_TEXT(4, trace, "ccwret");
1da177e4
LT		 1154 if (return_code != 0) {
1155 switch (return_code) {
b805da74
AR		 1156 case -EBUSY: /* BUSY is a transient state no action needed */
1157 break;
1158 case -ENODEV:
4811fcb7
AR		 1159 dev_err(&cdev->dev, "The remote channel adapter is not"
1160 " available\n");
b805da74
AR		 1161 break;
1162 case -EINVAL:
4811fcb7
AR		 1163 dev_err(&cdev->dev,
1164 "The status of the remote channel adapter"
1165 " is not valid\n");
b805da74
AR		 1166 break;
1167 default:
4811fcb7
AR		 1168 dev_err(&cdev->dev, "The common device layer"
1169 " returned error code %d\n",
1170 return_code);
b805da74
AR		 1171 }
1172 }
1173 CLAW_DBF_TEXT(4, trace, "ccwret");
1da177e4
LT		 1174} /* end of ccw_check_return_code */
1175
1176/*-------------------------------------------------------------------*
1177* ccw_check_unit_check *
1178*--------------------------------------------------------------------*/
1179
4d284cac 1180static void
1da177e4
LT		 1181ccw_check_unit_check(struct chbk * p_ch, unsigned char sense )
1182{
b805da74 1183 struct net_device *ndev = p_ch->ndev;
4811fcb7 1184 struct device *dev = &p_ch->cdev->dev;
1da177e4 1185
b805da74 1186 CLAW_DBF_TEXT(4, trace, "unitchek");
4811fcb7
AR		 1187 dev_warn(dev, "The communication peer of %s disconnected\n",
1188 ndev->name);
1da177e4
LT		 1189
1190 if (sense & 0x40) {
1191 if (sense & 0x01) {
4811fcb7
AR		 1192 dev_warn(dev, "The remote channel adapter for"
1193 " %s has been reset\n",
1194 ndev->name);
1da177e4
LT		 1195 }
1196 }
1197 else if (sense & 0x20) {
1198 if (sense & 0x04) {
4811fcb7
AR		 1199 dev_warn(dev, "A data streaming timeout occurred"
1200 " for %s\n",
1201 ndev->name);
1da177e4
LT		 1202 }
1203 else {
4811fcb7
AR		 1204 dev_warn(dev, "A data transfer parity error occurred"
1205 " for %s\n",
1206 ndev->name);
1da177e4
LT		 1207 }
1208 }
1209 else if (sense & 0x10) {
1210 if (sense & 0x20) {
4811fcb7
AR		 1211 dev_warn(dev, "The remote channel adapter for %s"
1212 " is faulty\n",
1213 ndev->name);
1da177e4
LT		 1214 }
1215 else {
4811fcb7
AR		 1216 dev_warn(dev, "A read data parity error occurred"
1217 " for %s\n",
1218 ndev->name);
1da177e4
LT		 1219 }
1220 }
1221
1da177e4
LT		 1222} /* end of ccw_check_unit_check */
1223
1da177e4
LT		 1224/*-------------------------------------------------------------------*
1225* find_link *
1226*--------------------------------------------------------------------*/
1227static int
1228find_link(struct net_device *dev, char *host_name, char *ws_name )
1229{
1230 struct claw_privbk *privptr;
1231 struct claw_env *p_env;
1232 int rc=0;
1233
b805da74 1234 CLAW_DBF_TEXT(2, setup, "findlink");
6951df34 1235 privptr = dev->ml_priv;
1da177e4
LT		 1236 p_env=privptr->p_env;
1237 switch (p_env->packing)
1238 {
1239 case PACKING_ASK:
1240 if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) ||
1241 (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 ))
1242 rc = EINVAL;
1243 break;
1244 case DO_PACKED:
1245 case PACK_SEND:
1246 if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) ||
1247 (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 ))
1248 rc = EINVAL;
1249 break;
1250 default:
1251 if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) ||
1252 (memcmp(p_env->api_type , ws_name, 8)!=0))
1253 rc = EINVAL;
1254 break;
1255 }
1256
1da177e4
LT		 1257 return 0;
1258} /* end of find_link */
1259
1260/*-------------------------------------------------------------------*
1261 * claw_hw_tx *
1262 * *
1263 * *
1264 *-------------------------------------------------------------------*/
1265
1266static int
1267claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid)
1268{
1269 int rc=0;
1270 struct claw_privbk *privptr;
1271 struct ccwbk *p_this_ccw;
1272 struct ccwbk *p_first_ccw;
1273 struct ccwbk *p_last_ccw;
1274 __u32 numBuffers;
1275 signed long len_of_data;
1276 unsigned long bytesInThisBuffer;
1277 unsigned char *pDataAddress;
1278 struct endccw *pEnd;
1279 struct ccw1 tempCCW;
1280 struct chbk *p_ch;
1281 struct claw_env *p_env;
1282 int lock;
1283 struct clawph *pk_head;
1284 struct chbk *ch;
b805da74
AR		 1285
1286 CLAW_DBF_TEXT(4, trace, "hw_tx");
6951df34 1287 privptr = (struct claw_privbk *)(dev->ml_priv);
1da177e4
LT		 1288 p_ch=(struct chbk *)&privptr->channel[WRITE];
1289 p_env =privptr->p_env;
1da177e4
LT		 1290 claw_free_wrt_buf(dev); /* Clean up free chain if posible */
1291 /* scan the write queue to free any completed write packets */
1292 p_first_ccw=NULL;
1293 p_last_ccw=NULL;
1294 if ((p_env->packing >= PACK_SEND) &&
1295 (skb->cb[1] != 'P')) {
1296 skb_push(skb,sizeof(struct clawph));
1297 pk_head=(struct clawph *)skb->data;
1298 pk_head->len=skb->len-sizeof(struct clawph);
1299 if (pk_head->len%4) {
1300 pk_head->len+= 4-(pk_head->len%4);
1301 skb_pad(skb,4-(pk_head->len%4));
1302 skb_put(skb,4-(pk_head->len%4));
1303 }
1304 if (p_env->packing == DO_PACKED)
1305 pk_head->link_num = linkid;
1306 else
1307 pk_head->link_num = 0;
1308 pk_head->flag = 0x00;
1309 skb_pad(skb,4);
1310 skb->cb[1] = 'P';
1311 }
1312 if (linkid == 0) {
1313 if (claw_check_busy(dev)) {
1314 if (privptr->write_free_count!=0) {
1315 claw_clear_busy(dev);
1316 }
1317 else {
1318 claw_strt_out_IO(dev );
1319 claw_free_wrt_buf( dev );
1320 if (privptr->write_free_count==0) {
1da177e4
LT		 1321 ch = &privptr->channel[WRITE];
1322 atomic_inc(&skb->users);
1323 skb_queue_tail(&ch->collect_queue, skb);
1324 goto Done;
1325 }
1326 else {
1327 claw_clear_busy(dev);
1328 }
1329 }
1330 }
1331 /* tx lock */
1332 if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */
1da177e4
LT		 1333 ch = &privptr->channel[WRITE];
1334 atomic_inc(&skb->users);
1335 skb_queue_tail(&ch->collect_queue, skb);
1336 claw_strt_out_IO(dev );
1337 rc=-EBUSY;
1338 goto Done2;
1339 }
1340 }
1341 /* See how many write buffers are required to hold this data */
f5154fbf 1342 numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size);
1da177e4
LT		 1343
1344 /* If that number of buffers isn't available, give up for now */
1345 if (privptr->write_free_count < numBuffers ||
1346 privptr->p_write_free_chain == NULL ) {
1347
1348 claw_setbit_busy(TB_NOBUFFER,dev);
1da177e4
LT		 1349 ch = &privptr->channel[WRITE];
1350 atomic_inc(&skb->users);
1351 skb_queue_tail(&ch->collect_queue, skb);
b805da74 1352 CLAW_DBF_TEXT(2, trace, "clawbusy");
1da177e4
LT		 1353 goto Done2;
1354 }
1355 pDataAddress=skb->data;
1356 len_of_data=skb->len;
1357
1358 while (len_of_data > 0) {
1da177e4
LT		 1359 p_this_ccw=privptr->p_write_free_chain; /* get a block */
1360 if (p_this_ccw == NULL) { /* lost the race */
1361 ch = &privptr->channel[WRITE];
1362 atomic_inc(&skb->users);
1363 skb_queue_tail(&ch->collect_queue, skb);
1364 goto Done2;
1365 }
1366 privptr->p_write_free_chain=p_this_ccw->next;
1367 p_this_ccw->next=NULL;
1368 --privptr->write_free_count; /* -1 */
1369 bytesInThisBuffer=len_of_data;
1370 memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer);
1371 len_of_data-=bytesInThisBuffer;
1372 pDataAddress+=(unsigned long)bytesInThisBuffer;
1373 /* setup write CCW */
1374 p_this_ccw->write.cmd_code = (linkid * 8) +1;
1375 if (len_of_data>0) {
1376 p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG;
1377 }
1378 p_this_ccw->write.count=bytesInThisBuffer;
1379 /* now add to end of this chain */
1380 if (p_first_ccw==NULL) {
1381 p_first_ccw=p_this_ccw;
1382 }
1383 if (p_last_ccw!=NULL) {
1384 p_last_ccw->next=p_this_ccw;
1385 /* set up TIC ccws */
1386 p_last_ccw->w_TIC_1.cda=
1387 (__u32)__pa(&p_this_ccw->write);
1388 }
1389 p_last_ccw=p_this_ccw; /* save new last block */
1da177e4
LT		 1390 }
1391
1392 /* FirstCCW and LastCCW now contain a new set of write channel
1393 * programs to append to the running channel program
1394 */
1395
1396 if (p_first_ccw!=NULL) {
4811fcb7 1397 /* setup ending ccw sequence for this segment */
1da177e4
LT		 1398 pEnd=privptr->p_end_ccw;
1399 if (pEnd->write1) {
1400 pEnd->write1=0x00; /* second end ccw is now active */
1401 /* set up Tic CCWs */
1402 p_last_ccw->w_TIC_1.cda=
1403 (__u32)__pa(&pEnd->write2_nop1);
1404 pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1405 pEnd->write2_nop2.flags =
1406 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1407 pEnd->write2_nop2.cda=0;
1408 pEnd->write2_nop2.count=1;
1409 }
1410 else { /* end of if (pEnd->write1)*/
1411 pEnd->write1=0x01; /* first end ccw is now active */
1412 /* set up Tic CCWs */
1413 p_last_ccw->w_TIC_1.cda=
1414 (__u32)__pa(&pEnd->write1_nop1);
1415 pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1416 pEnd->write1_nop2.flags =
1417 CCW_FLAG_SLI | CCW_FLAG_SKIP;
1418 pEnd->write1_nop2.cda=0;
1419 pEnd->write1_nop2.count=1;
1420 } /* end if if (pEnd->write1) */
1421
1da177e4
LT		 1422 if (privptr->p_write_active_first==NULL ) {
1423 privptr->p_write_active_first=p_first_ccw;
1424 privptr->p_write_active_last=p_last_ccw;
1425 }
1426 else {
1da177e4
LT		 1427 /* set up Tic CCWs */
1428
1429 tempCCW.cda=(__u32)__pa(&p_first_ccw->write);
1430 tempCCW.count=0;
1431 tempCCW.flags=0;
1432 tempCCW.cmd_code=CCW_CLAW_CMD_TIC;
1433
1434 if (pEnd->write1) {
1435
1436 /*
1437 * first set of ending CCW's is chained to the new write
1438 * chain, so the second set is chained to the active chain
1439 * Therefore modify the second set to point the new write chain.
1440 * make sure we update the CCW atomically
1441 * so channel does not fetch it when it's only half done
1442 */
1443 memcpy( &pEnd->write2_nop2, &tempCCW ,
1444 sizeof(struct ccw1));
1445 privptr->p_write_active_last->w_TIC_1.cda=
1446 (__u32)__pa(&p_first_ccw->write);
1447 }
1448 else {
1449
1450 /*make sure we update the CCW atomically
1451 *so channel does not fetch it when it's only half done
1452 */
1453 memcpy(&pEnd->write1_nop2, &tempCCW ,
1454 sizeof(struct ccw1));
1455 privptr->p_write_active_last->w_TIC_1.cda=
1456 (__u32)__pa(&p_first_ccw->write);
1457
1458 } /* end if if (pEnd->write1) */
1459
1460 privptr->p_write_active_last->next=p_first_ccw;
1461 privptr->p_write_active_last=p_last_ccw;
1462 }
1463
1464 } /* endif (p_first_ccw!=NULL) */
8e84c801 1465 dev_kfree_skb_any(skb);
1da177e4
LT		 1466 if (linkid==0) {
1467 lock=LOCK_NO;
1468 }
1469 else {
1470 lock=LOCK_YES;
1471 }
1472 claw_strt_out_IO(dev );
1473 /* if write free count is zero , set NOBUFFER */
1da177e4
LT		 1474 if (privptr->write_free_count==0) {
1475 claw_setbit_busy(TB_NOBUFFER,dev);
1476 }
1477Done2:
1478 claw_clearbit_busy(TB_TX,dev);
1479Done:
1da177e4
LT		 1480 return(rc);
1481} /* end of claw_hw_tx */
1482
1483/*-------------------------------------------------------------------*
1484* *
1485* init_ccw_bk *
1486* *
1487*--------------------------------------------------------------------*/
1488
1489static int
1490init_ccw_bk(struct net_device *dev)
1491{
1492
1493 __u32 ccw_blocks_required;
1494 __u32 ccw_blocks_perpage;
1495 __u32 ccw_pages_required;
1496 __u32 claw_reads_perpage=1;
1497 __u32 claw_read_pages;
1498 __u32 claw_writes_perpage=1;
1499 __u32 claw_write_pages;
1500 void *p_buff=NULL;
1501 struct ccwbk*p_free_chain;
1502 struct ccwbk*p_buf;
1503 struct ccwbk*p_last_CCWB;
1504 struct ccwbk*p_first_CCWB;
1505 struct endccw *p_endccw=NULL;
6951df34
PT		 1506 addr_t real_address;
1507 struct claw_privbk *privptr = dev->ml_priv;
1da177e4
LT		 1508 struct clawh *pClawH=NULL;
1509 addr_t real_TIC_address;
1510 int i,j;
b805da74 1511 CLAW_DBF_TEXT(4, trace, "init_ccw");
1da177e4
LT		 1512
1513 /* initialize statistics field */
1514 privptr->active_link_ID=0;
1515 /* initialize ccwbk pointers */
1516 privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/
1517 privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/
1518 privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/
1519 privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/
1520 privptr->p_read_active_last=NULL; /* pointer to the last read ccw */
1521 privptr->p_end_ccw=NULL; /* pointer to ending ccw */
1522 privptr->p_claw_signal_blk=NULL; /* pointer to signal block */
1523 privptr->buffs_alloc = 0;
1524 memset(&privptr->end_ccw, 0x00, sizeof(struct endccw));
1525 memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl));
1526 /* initialize free write ccwbk counter */
1527 privptr->write_free_count=0; /* number of free bufs on write chain */
1528 p_last_CCWB = NULL;
1529 p_first_CCWB= NULL;
1530 /*
1531 * We need 1 CCW block for each read buffer, 1 for each
1532 * write buffer, plus 1 for ClawSignalBlock
1533 */
1534 ccw_blocks_required =
1535 privptr->p_env->read_buffers+privptr->p_env->write_buffers+1;
1da177e4
LT		 1536 /*
1537 * compute number of CCW blocks that will fit in a page
1538 */
1539 ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE;
1540 ccw_pages_required=
f5154fbf 1541 DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage);
1da177e4 1542
1da177e4
LT		 1543 /*
1544 * read and write sizes are set by 2 constants in claw.h
1545 * 4k and 32k. Unpacked values other than 4k are not going to
1546 * provide good performance. With packing buffers support 32k
1547 * buffers are used.
1548 */
f5154fbf
JL		 1549 if (privptr->p_env->read_size < PAGE_SIZE) {
1550 claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size;
1551 claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers,
1552 claw_reads_perpage);
1da177e4
LT		 1553 }
1554 else { /* > or equal */
f5154fbf
JL		 1555 privptr->p_buff_pages_perread =
1556 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1557 claw_read_pages = privptr->p_env->read_buffers *
1558 privptr->p_buff_pages_perread;
1da177e4
LT		 1559 }
1560 if (privptr->p_env->write_size < PAGE_SIZE) {
f5154fbf
JL		 1561 claw_writes_perpage =
1562 PAGE_SIZE / privptr->p_env->write_size;
1563 claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers,
1564 claw_writes_perpage);
1da177e4
LT		 1565
1566 }
1567 else { /* > or equal */
f5154fbf
JL		 1568 privptr->p_buff_pages_perwrite =
1569 DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE);
1570 claw_write_pages = privptr->p_env->write_buffers *
1571 privptr->p_buff_pages_perwrite;
1da177e4 1572 }
1da177e4
LT		 1573 /*
1574 * allocate ccw_pages_required
1575 */
1576 if (privptr->p_buff_ccw==NULL) {
1577 privptr->p_buff_ccw=
1578 (void *)__get_free_pages(__GFP_DMA,
1579 (int)pages_to_order_of_mag(ccw_pages_required ));
1580 if (privptr->p_buff_ccw==NULL) {
1da177e4
LT		 1581 return -ENOMEM;
1582 }
1583 privptr->p_buff_ccw_num=ccw_pages_required;
1584 }
1585 memset(privptr->p_buff_ccw, 0x00,
1586 privptr->p_buff_ccw_num * PAGE_SIZE);
1587
1588 /*
1589 * obtain ending ccw block address
1590 *
1591 */
1592 privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw;
1593 real_address = (__u32)__pa(privptr->p_end_ccw);
1594 /* Initialize ending CCW block */
1da177e4
LT		 1595 p_endccw=privptr->p_end_ccw;
1596 p_endccw->real=real_address;
1597 p_endccw->write1=0x00;
1598 p_endccw->read1=0x00;
1599
1600 /* write1_nop1 */
1601 p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1602 p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1603 p_endccw->write1_nop1.count = 1;
1604 p_endccw->write1_nop1.cda = 0;
1605
1606 /* write1_nop2 */
1607 p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1608 p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1609 p_endccw->write1_nop2.count = 1;
1610 p_endccw->write1_nop2.cda = 0;
1611
1612 /* write2_nop1 */
1613 p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1614 p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1615 p_endccw->write2_nop1.count = 1;
1616 p_endccw->write2_nop1.cda = 0;
1617
1618 /* write2_nop2 */
1619 p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1620 p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1621 p_endccw->write2_nop2.count = 1;
1622 p_endccw->write2_nop2.cda = 0;
1623
1624 /* read1_nop1 */
1625 p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1626 p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1627 p_endccw->read1_nop1.count = 1;
1628 p_endccw->read1_nop1.cda = 0;
1629
1630 /* read1_nop2 */
1631 p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1632 p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1633 p_endccw->read1_nop2.count = 1;
1634 p_endccw->read1_nop2.cda = 0;
1635
1636 /* read2_nop1 */
1637 p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP;
1638 p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1639 p_endccw->read2_nop1.count = 1;
1640 p_endccw->read2_nop1.cda = 0;
1641
1642 /* read2_nop2 */
1643 p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF;
1644 p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP;
1645 p_endccw->read2_nop2.count = 1;
1646 p_endccw->read2_nop2.cda = 0;
1647
1da177e4
LT		 1648 /*
1649 * Build a chain of CCWs
1650 *
1651 */
1da177e4
LT		 1652 p_buff=privptr->p_buff_ccw;
1653
1654 p_free_chain=NULL;
1655 for (i=0 ; i < ccw_pages_required; i++ ) {
1656 real_address = (__u32)__pa(p_buff);
1657 p_buf=p_buff;
1658 for (j=0 ; j < ccw_blocks_perpage ; j++) {
1659 p_buf->next = p_free_chain;
1660 p_free_chain = p_buf;
1661 p_buf->real=(__u32)__pa(p_buf);
1662 ++p_buf;
1663 }
1664 p_buff+=PAGE_SIZE;
1665 }
1da177e4
LT		 1666 /*
1667 * Initialize ClawSignalBlock
1668 *
1669 */
1da177e4
LT		 1670 if (privptr->p_claw_signal_blk==NULL) {
1671 privptr->p_claw_signal_blk=p_free_chain;
1672 p_free_chain=p_free_chain->next;
1673 pClawH=(struct clawh *)privptr->p_claw_signal_blk;
1674 pClawH->length=0xffff;
1675 pClawH->opcode=0xff;
1676 pClawH->flag=CLAW_BUSY;
1677 }
1da177e4
LT		 1678
1679 /*
1680 * allocate write_pages_required and add to free chain
1681 */
1682 if (privptr->p_buff_write==NULL) {
1683 if (privptr->p_env->write_size < PAGE_SIZE) {
1684 privptr->p_buff_write=
1685 (void *)__get_free_pages(__GFP_DMA,
1686 (int)pages_to_order_of_mag(claw_write_pages ));
1687 if (privptr->p_buff_write==NULL) {
1da177e4 1688 privptr->p_buff_ccw=NULL;
1da177e4
LT		 1689 return -ENOMEM;
1690 }
1691 /*
1692 * Build CLAW write free chain
1693 *
1694 */
1695
1696 memset(privptr->p_buff_write, 0x00,
1697 ccw_pages_required * PAGE_SIZE);
1da177e4
LT		 1698 privptr->p_write_free_chain=NULL;
1699
1700 p_buff=privptr->p_buff_write;
1701
1702 for (i=0 ; i< privptr->p_env->write_buffers ; i++) {
1703 p_buf = p_free_chain; /* get a CCW */
1704 p_free_chain = p_buf->next;
1705 p_buf->next =privptr->p_write_free_chain;
1706 privptr->p_write_free_chain = p_buf;
1707 p_buf-> p_buffer = (struct clawbuf *)p_buff;
1708 p_buf-> write.cda = (__u32)__pa(p_buff);
1709 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1710 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1711 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1712 p_buf-> w_read_FF.count = 1;
1713 p_buf-> w_read_FF.cda =
1714 (__u32)__pa(&p_buf-> header.flag);
1715 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1716 p_buf-> w_TIC_1.flags = 0;
1717 p_buf-> w_TIC_1.count = 0;
1718
4811fcb7
AR		 1719 if (((unsigned long)p_buff +
1720 privptr->p_env->write_size) >=
1da177e4 1721 ((unsigned long)(p_buff+2*
4811fcb7
AR		 1722 (privptr->p_env->write_size) - 1) & PAGE_MASK)) {
1723 p_buff = p_buff+privptr->p_env->write_size;
1da177e4
LT		 1724 }
1725 }
1726 }
1727 else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */
1728 {
1729 privptr->p_write_free_chain=NULL;
1730 for (i = 0; i< privptr->p_env->write_buffers ; i++) {
1731 p_buff=(void *)__get_free_pages(__GFP_DMA,
1732 (int)pages_to_order_of_mag(
1733 privptr->p_buff_pages_perwrite) );
1da177e4 1734 if (p_buff==NULL) {
1da177e4
LT		 1735 free_pages((unsigned long)privptr->p_buff_ccw,
1736 (int)pages_to_order_of_mag(
1737 privptr->p_buff_ccw_num));
1738 privptr->p_buff_ccw=NULL;
1739 p_buf=privptr->p_buff_write;
1740 while (p_buf!=NULL) {
1741 free_pages((unsigned long)
1742 p_buf->p_buffer,
1743 (int)pages_to_order_of_mag(
1744 privptr->p_buff_pages_perwrite));
1745 p_buf=p_buf->next;
1746 }
1da177e4
LT		 1747 return -ENOMEM;
1748 } /* Error on get_pages */
1749 memset(p_buff, 0x00, privptr->p_env->write_size );
1750 p_buf = p_free_chain;
1751 p_free_chain = p_buf->next;
1752 p_buf->next = privptr->p_write_free_chain;
1753 privptr->p_write_free_chain = p_buf;
1754 privptr->p_buff_write = p_buf;
1755 p_buf->p_buffer=(struct clawbuf *)p_buff;
1756 p_buf-> write.cda = (__u32)__pa(p_buff);
1757 p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1758 p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1759 p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1760 p_buf-> w_read_FF.count = 1;
1761 p_buf-> w_read_FF.cda =
1762 (__u32)__pa(&p_buf-> header.flag);
1763 p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1764 p_buf-> w_TIC_1.flags = 0;
1765 p_buf-> w_TIC_1.count = 0;
1766 } /* for all write_buffers */
1767
1768 } /* else buffers are PAGE_SIZE or bigger */
1769
1770 }
1771 privptr->p_buff_write_num=claw_write_pages;
1772 privptr->write_free_count=privptr->p_env->write_buffers;
1773
1774
1da177e4
LT		 1775 /*
1776 * allocate read_pages_required and chain to free chain
1777 */
1778 if (privptr->p_buff_read==NULL) {
1779 if (privptr->p_env->read_size < PAGE_SIZE) {
1780 privptr->p_buff_read=
1781 (void *)__get_free_pages(__GFP_DMA,
1782 (int)pages_to_order_of_mag(claw_read_pages) );
1783 if (privptr->p_buff_read==NULL) {
1da177e4
LT		 1784 free_pages((unsigned long)privptr->p_buff_ccw,
1785 (int)pages_to_order_of_mag(
1786 privptr->p_buff_ccw_num));
1787 /* free the write pages size is < page size */
1788 free_pages((unsigned long)privptr->p_buff_write,
1789 (int)pages_to_order_of_mag(
1790 privptr->p_buff_write_num));
1791 privptr->p_buff_ccw=NULL;
1792 privptr->p_buff_write=NULL;
1da177e4
LT		 1793 return -ENOMEM;
1794 }
1795 memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE);
1796 privptr->p_buff_read_num=claw_read_pages;
1797 /*
1798 * Build CLAW read free chain
1799 *
1800 */
1da177e4
LT		 1801 p_buff=privptr->p_buff_read;
1802 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1803 p_buf = p_free_chain;
1804 p_free_chain = p_buf->next;
1805
1806 if (p_last_CCWB==NULL) {
1807 p_buf->next=NULL;
1808 real_TIC_address=0;
1809 p_last_CCWB=p_buf;
1810 }
1811 else {
1812 p_buf->next=p_first_CCWB;
1813 real_TIC_address=
1814 (__u32)__pa(&p_first_CCWB -> read );
1815 }
1816
1817 p_first_CCWB=p_buf;
1818
1819 p_buf->p_buffer=(struct clawbuf *)p_buff;
1820 /* initialize read command */
1821 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1822 p_buf-> read.cda = (__u32)__pa(p_buff);
1823 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1824 p_buf-> read.count = privptr->p_env->read_size;
1825
1826 /* initialize read_h command */
1827 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1828 p_buf-> read_h.cda =
1829 (__u32)__pa(&(p_buf->header));
1830 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1831 p_buf-> read_h.count = sizeof(struct clawh);
1832
1833 /* initialize Signal command */
1834 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1835 p_buf-> signal.cda =
1836 (__u32)__pa(&(pClawH->flag));
1837 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1838 p_buf-> signal.count = 1;
1839
1840 /* initialize r_TIC_1 command */
1841 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1842 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1843 p_buf-> r_TIC_1.flags = 0;
1844 p_buf-> r_TIC_1.count = 0;
1845
1846 /* initialize r_read_FF command */
1847 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1848 p_buf-> r_read_FF.cda =
1849 (__u32)__pa(&(pClawH->flag));
1850 p_buf-> r_read_FF.flags =
1851 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1852 p_buf-> r_read_FF.count = 1;
1853
1854 /* initialize r_TIC_2 */
1855 memcpy(&p_buf->r_TIC_2,
1856 &p_buf->r_TIC_1, sizeof(struct ccw1));
1857
1858 /* initialize Header */
1859 p_buf->header.length=0xffff;
1860 p_buf->header.opcode=0xff;
1861 p_buf->header.flag=CLAW_PENDING;
1862
4811fcb7
AR		 1863 if (((unsigned long)p_buff+privptr->p_env->read_size) >=
1864 ((unsigned long)(p_buff+2*(privptr->p_env->read_size)
1865 -1)
1866 & PAGE_MASK)) {
1da177e4
LT		 1867 p_buff= p_buff+privptr->p_env->read_size;
1868 }
1869 else {
1870 p_buff=
1871 (void *)((unsigned long)
4811fcb7 1872 (p_buff+2*(privptr->p_env->read_size)-1)
1da177e4
LT		 1873 & PAGE_MASK) ;
1874 }
1875 } /* for read_buffers */
1876 } /* read_size < PAGE_SIZE */
1877 else { /* read Size >= PAGE_SIZE */
1da177e4
LT		 1878 for (i=0 ; i< privptr->p_env->read_buffers ; i++) {
1879 p_buff = (void *)__get_free_pages(__GFP_DMA,
4811fcb7
AR		 1880 (int)pages_to_order_of_mag(
1881 privptr->p_buff_pages_perread));
1da177e4 1882 if (p_buff==NULL) {
1da177e4 1883 free_pages((unsigned long)privptr->p_buff_ccw,
4811fcb7
AR		 1884 (int)pages_to_order_of_mag(privptr->
1885 p_buff_ccw_num));
1da177e4
LT		 1886 /* free the write pages */
1887 p_buf=privptr->p_buff_write;
1888 while (p_buf!=NULL) {
4811fcb7
AR		 1889 free_pages(
1890 (unsigned long)p_buf->p_buffer,
1891 (int)pages_to_order_of_mag(
1892 privptr->p_buff_pages_perwrite));
1da177e4
LT		 1893 p_buf=p_buf->next;
1894 }
1895 /* free any read pages already alloc */
1896 p_buf=privptr->p_buff_read;
1897 while (p_buf!=NULL) {
4811fcb7
AR		 1898 free_pages(
1899 (unsigned long)p_buf->p_buffer,
1900 (int)pages_to_order_of_mag(
1901 privptr->p_buff_pages_perread));
1da177e4
LT		 1902 p_buf=p_buf->next;
1903 }
1904 privptr->p_buff_ccw=NULL;
1905 privptr->p_buff_write=NULL;
1da177e4
LT		 1906 return -ENOMEM;
1907 }
1908 memset(p_buff, 0x00, privptr->p_env->read_size);
1909 p_buf = p_free_chain;
1910 privptr->p_buff_read = p_buf;
1911 p_free_chain = p_buf->next;
1912
1913 if (p_last_CCWB==NULL) {
1914 p_buf->next=NULL;
1915 real_TIC_address=0;
1916 p_last_CCWB=p_buf;
1917 }
1918 else {
1919 p_buf->next=p_first_CCWB;
1920 real_TIC_address=
1921 (addr_t)__pa(
1922 &p_first_CCWB -> read );
1923 }
1924
1925 p_first_CCWB=p_buf;
1926 /* save buff address */
1927 p_buf->p_buffer=(struct clawbuf *)p_buff;
1928 /* initialize read command */
1929 p_buf-> read.cmd_code = CCW_CLAW_CMD_READ;
1930 p_buf-> read.cda = (__u32)__pa(p_buff);
1931 p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1932 p_buf-> read.count = privptr->p_env->read_size;
1933
1934 /* initialize read_h command */
1935 p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER;
1936 p_buf-> read_h.cda =
1937 (__u32)__pa(&(p_buf->header));
1938 p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1939 p_buf-> read_h.count = sizeof(struct clawh);
1940
1941 /* initialize Signal command */
1942 p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD;
1943 p_buf-> signal.cda =
1944 (__u32)__pa(&(pClawH->flag));
1945 p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC;
1946 p_buf-> signal.count = 1;
1947
1948 /* initialize r_TIC_1 command */
1949 p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC;
1950 p_buf-> r_TIC_1.cda = (__u32)real_TIC_address;
1951 p_buf-> r_TIC_1.flags = 0;
1952 p_buf-> r_TIC_1.count = 0;
1953
1954 /* initialize r_read_FF command */
1955 p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF;
1956 p_buf-> r_read_FF.cda =
1957 (__u32)__pa(&(pClawH->flag));
1958 p_buf-> r_read_FF.flags =
1959 CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI;
1960 p_buf-> r_read_FF.count = 1;
1961
1962 /* initialize r_TIC_2 */
1963 memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1,
1964 sizeof(struct ccw1));
1965
1966 /* initialize Header */
1967 p_buf->header.length=0xffff;
1968 p_buf->header.opcode=0xff;
1969 p_buf->header.flag=CLAW_PENDING;
1970
1971 } /* For read_buffers */
1972 } /* read_size >= PAGE_SIZE */
1973 } /* pBuffread = NULL */
1da177e4
LT		 1974 add_claw_reads( dev ,p_first_CCWB , p_last_CCWB);
1975 privptr->buffs_alloc = 1;
b805da74 1976
1da177e4
LT		 1977 return 0;
1978} /* end of init_ccw_bk */
1979
1980/*-------------------------------------------------------------------*
1981* *
1982* probe_error *
1983* *
1984*--------------------------------------------------------------------*/
1985
1986static void
1987probe_error( struct ccwgroup_device *cgdev)
1988{
2b356b46 1989 struct claw_privbk *privptr;
b805da74
AR		 1990
1991 CLAW_DBF_TEXT(4, trace, "proberr");
2b356b46
MS		 1992 privptr = (struct claw_privbk *) cgdev->dev.driver_data;
1993 if (privptr != NULL) {
1994 cgdev->dev.driver_data = NULL;
17fd682e 1995 kfree(privptr->p_env);
2b356b46
MS		 1996 kfree(privptr->p_mtc_envelope);
1997 kfree(privptr);
1998 }
1da177e4
LT		 1999} /* probe_error */
2000
1da177e4
LT		 2001/*-------------------------------------------------------------------*
2002* claw_process_control *
2003* *
2004* *
2005*--------------------------------------------------------------------*/
2006
2007static int
2008claw_process_control( struct net_device *dev, struct ccwbk * p_ccw)
2009{
2010
2011 struct clawbuf *p_buf;
2012 struct clawctl ctlbk;
2013 struct clawctl *p_ctlbk;
2014 char temp_host_name[8];
2015 char temp_ws_name[8];
2016 struct claw_privbk *privptr;
2017 struct claw_env *p_env;
2018 struct sysval *p_sysval;
2019 struct conncmd *p_connect=NULL;
2020 int rc;
2021 struct chbk *p_ch = NULL;
b805da74
AR		 2022 struct device *tdev;
2023 CLAW_DBF_TEXT(2, setup, "clw_cntl");
1da177e4
LT		 2024 udelay(1000); /* Wait a ms for the control packets to
2025 *catch up to each other */
6951df34 2026 privptr = dev->ml_priv;
1da177e4 2027 p_env=privptr->p_env;
b805da74 2028 tdev = &privptr->channel[READ].cdev->dev;
1da177e4
LT		 2029 memcpy( &temp_host_name, p_env->host_name, 8);
2030 memcpy( &temp_ws_name, p_env->adapter_name , 8);
4811fcb7 2031 dev_info(tdev, "%s: CLAW device %.8s: "
1da177e4
LT		 2032 "Received Control Packet\n",
2033 dev->name, temp_ws_name);
2034 if (privptr->release_pend==1) {
1da177e4
LT		 2035 return 0;
2036 }
2037 p_buf=p_ccw->p_buffer;
2038 p_ctlbk=&ctlbk;
2039 if (p_env->packing == DO_PACKED) { /* packing in progress?*/
2040 memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl));
2041 } else {
2042 memcpy(p_ctlbk, p_buf, sizeof(struct clawctl));
2043 }
1da177e4
LT		 2044 switch (p_ctlbk->command)
2045 {
b805da74
AR		 2046 case SYSTEM_VALIDATE_REQUEST:
2047 if (p_ctlbk->version != CLAW_VERSION_ID) {
2048 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2049 CLAW_RC_WRONG_VERSION);
4811fcb7
AR		 2050 dev_warn(tdev, "The communication peer of %s"
2051 " uses an incorrect API version %d\n",
2052 dev->name, p_ctlbk->version);
b805da74
AR		 2053 }
2054 p_sysval = (struct sysval *)&(p_ctlbk->data);
4811fcb7
AR		 2055 dev_info(tdev, "%s: Recv Sys Validate Request: "
2056 "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s,"
2057 "Host name=%.8s\n",
2058 dev->name, p_ctlbk->version,
2059 p_ctlbk->linkid,
2060 p_ctlbk->correlator,
2061 p_sysval->WS_name,
2062 p_sysval->host_name);
b805da74
AR		 2063 if (memcmp(temp_host_name, p_sysval->host_name, 8)) {
2064 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2065 CLAW_RC_NAME_MISMATCH);
2066 CLAW_DBF_TEXT(2, setup, "HSTBAD");
2067 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name);
2068 CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name);
4811fcb7
AR		 2069 dev_warn(tdev,
2070 "Host name %s for %s does not match the"
2071 " remote adapter name %s\n",
b805da74 2072 p_sysval->host_name,
4811fcb7 2073 dev->name,
b805da74
AR		 2074 temp_host_name);
2075 }
2076 if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) {
2077 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2078 CLAW_RC_NAME_MISMATCH);
2079 CLAW_DBF_TEXT(2, setup, "WSNBAD");
2080 CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name);
2081 CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name);
4811fcb7
AR		 2082 dev_warn(tdev, "Adapter name %s for %s does not match"
2083 " the remote host name %s\n",
2084 p_sysval->WS_name,
2085 dev->name,
2086 temp_ws_name);
b805da74
AR		 2087 }
2088 if ((p_sysval->write_frame_size < p_env->write_size) &&
2089 (p_env->packing == 0)) {
2090 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2091 CLAW_RC_HOST_RCV_TOO_SMALL);
4811fcb7
AR		 2092 dev_warn(tdev,
2093 "The local write buffer is smaller than the"
2094 " remote read buffer\n");
b805da74
AR		 2095 CLAW_DBF_TEXT(2, setup, "wrtszbad");
2096 }
2097 if ((p_sysval->read_frame_size < p_env->read_size) &&
2098 (p_env->packing == 0)) {
2099 claw_snd_sys_validate_rsp(dev, p_ctlbk,
2100 CLAW_RC_HOST_RCV_TOO_SMALL);
4811fcb7
AR		 2101 dev_warn(tdev,
2102 "The local read buffer is smaller than the"
2103 " remote write buffer\n");
b805da74
AR		 2104 CLAW_DBF_TEXT(2, setup, "rdsizbad");
2105 }
2106 claw_snd_sys_validate_rsp(dev, p_ctlbk, 0);
4811fcb7
AR		 2107 dev_info(tdev,
2108 "CLAW device %.8s: System validate"
2109 " completed.\n", temp_ws_name);
2110 dev_info(tdev,
2111 "%s: sys Validate Rsize:%d Wsize:%d\n",
2112 dev->name, p_sysval->read_frame_size,
2113 p_sysval->write_frame_size);
b805da74
AR		 2114 privptr->system_validate_comp = 1;
2115 if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0)
2116 p_env->packing = PACKING_ASK;
2117 claw_strt_conn_req(dev);
2118 break;
2119 case SYSTEM_VALIDATE_RESPONSE:
2120 p_sysval = (struct sysval *)&(p_ctlbk->data);
4811fcb7
AR		 2121 dev_info(tdev,
2122 "Settings for %s validated (version=%d, "
2123 "remote device=%d, rc=%d, adapter name=%.8s, "
2124 "host name=%.8s)\n",
b805da74
AR		 2125 dev->name,
2126 p_ctlbk->version,
2127 p_ctlbk->correlator,
2128 p_ctlbk->rc,
2129 p_sysval->WS_name,
2130 p_sysval->host_name);
2131 switch (p_ctlbk->rc) {
2132 case 0:
4811fcb7
AR		 2133 dev_info(tdev, "%s: CLAW device "
2134 "%.8s: System validate completed.\n",
2135 dev->name, temp_ws_name);
b805da74
AR		 2136 if (privptr->system_validate_comp == 0)
2137 claw_strt_conn_req(dev);
2138 privptr->system_validate_comp = 1;
2139 break;
2140 case CLAW_RC_NAME_MISMATCH:
4811fcb7
AR		 2141 dev_warn(tdev, "Validating %s failed because of"
2142 " a host or adapter name mismatch\n",
2143 dev->name);
b805da74
AR		 2144 break;
2145 case CLAW_RC_WRONG_VERSION:
4811fcb7
AR		 2146 dev_warn(tdev, "Validating %s failed because of a"
2147 " version conflict\n",
b805da74
AR		 2148 dev->name);
2149 break;
2150 case CLAW_RC_HOST_RCV_TOO_SMALL:
4811fcb7
AR		 2151 dev_warn(tdev, "Validating %s failed because of a"
2152 " frame size conflict\n",
b805da74
AR		 2153 dev->name);
2154 break;
2155 default:
4811fcb7
AR		 2156 dev_warn(tdev, "The communication peer of %s rejected"
2157 " the connection\n",
2158 dev->name);
b805da74
AR		 2159 break;
2160 }
2161 break;
1da177e4 2162
b805da74
AR		 2163 case CONNECTION_REQUEST:
2164 p_connect = (struct conncmd *)&(p_ctlbk->data);
4811fcb7 2165 dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d,"
b805da74
AR		 2166 "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n",
2167 dev->name,
2168 p_ctlbk->version,
2169 p_ctlbk->linkid,
2170 p_ctlbk->correlator,
2171 p_connect->host_name,
2172 p_connect->WS_name);
2173 if (privptr->active_link_ID != 0) {
2174 claw_snd_disc(dev, p_ctlbk);
4811fcb7
AR		 2175 dev_info(tdev, "%s rejected a connection request"
2176 " because it is already active\n",
b805da74
AR		 2177 dev->name);
2178 }
2179 if (p_ctlbk->linkid != 1) {
2180 claw_snd_disc(dev, p_ctlbk);
4811fcb7
AR		 2181 dev_info(tdev, "%s rejected a request to open multiple"
2182 " connections\n",
b805da74
AR		 2183 dev->name);
2184 }
2185 rc = find_link(dev, p_connect->host_name, p_connect->WS_name);
2186 if (rc != 0) {
2187 claw_snd_disc(dev, p_ctlbk);
4811fcb7
AR		 2188 dev_info(tdev, "%s rejected a connection request"
2189 " because of a type mismatch\n",
b805da74
AR		 2190 dev->name);
2191 }
2192 claw_send_control(dev,
2193 CONNECTION_CONFIRM, p_ctlbk->linkid,
2194 p_ctlbk->correlator,
2195 0, p_connect->host_name,
2196 p_connect->WS_name);
2197 if (p_env->packing == PACKING_ASK) {
2198 p_env->packing = PACK_SEND;
2199 claw_snd_conn_req(dev, 0);
2200 }
4811fcb7 2201 dev_info(tdev, "%s: CLAW device %.8s: Connection "
b805da74
AR		 2202 "completed link_id=%d.\n",
2203 dev->name, temp_ws_name,
2204 p_ctlbk->linkid);
2205 privptr->active_link_ID = p_ctlbk->linkid;
2206 p_ch = &privptr->channel[WRITE];
2207 wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */
2208 break;
2209 case CONNECTION_RESPONSE:
2210 p_connect = (struct conncmd *)&(p_ctlbk->data);
4811fcb7 2211 dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d,"
b805da74
AR		 2212 "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n",
2213 dev->name,
2214 p_ctlbk->version,
2215 p_ctlbk->linkid,
2216 p_ctlbk->correlator,
2217 p_ctlbk->rc,
2218 p_connect->host_name,
2219 p_connect->WS_name);
2220
2221 if (p_ctlbk->rc != 0) {
4811fcb7
AR		 2222 dev_warn(tdev, "The communication peer of %s rejected"
2223 " a connection request\n",
2224 dev->name);
b805da74
AR		 2225 return 1;
2226 }
2227 rc = find_link(dev,
2228 p_connect->host_name, p_connect->WS_name);
2229 if (rc != 0) {
2230 claw_snd_disc(dev, p_ctlbk);
4811fcb7
AR		 2231 dev_warn(tdev, "The communication peer of %s"
2232 " rejected a connection "
2233 "request because of a type mismatch\n",
b805da74
AR		 2234 dev->name);
2235 }
2236 /* should be until CONNECTION_CONFIRM */
2237 privptr->active_link_ID = -(p_ctlbk->linkid);
2238 break;
2239 case CONNECTION_CONFIRM:
2240 p_connect = (struct conncmd *)&(p_ctlbk->data);
4811fcb7
AR		 2241 dev_info(tdev,
2242 "%s: Recv Conn Confirm:Vers=%d,link_id=%d,"
b805da74
AR		 2243 "Corr=%d,Host appl=%.8s,WS appl=%.8s\n",
2244 dev->name,
2245 p_ctlbk->version,
2246 p_ctlbk->linkid,
2247 p_ctlbk->correlator,
2248 p_connect->host_name,
2249 p_connect->WS_name);
2250 if (p_ctlbk->linkid == -(privptr->active_link_ID)) {
2251 privptr->active_link_ID = p_ctlbk->linkid;
2252 if (p_env->packing > PACKING_ASK) {
4811fcb7
AR		 2253 dev_info(tdev,
2254 "%s: Confirmed Now packing\n", dev->name);
1da177e4
LT		 2255 p_env->packing = DO_PACKED;
2256 }
b805da74
AR		 2257 p_ch = &privptr->channel[WRITE];
2258 wake_up(&p_ch->wait);
2259 } else {
4811fcb7
AR		 2260 dev_warn(tdev, "Activating %s failed because of"
2261 " an incorrect link ID=%d\n",
b805da74
AR		 2262 dev->name, p_ctlbk->linkid);
2263 claw_snd_disc(dev, p_ctlbk);
2264 }
2265 break;
2266 case DISCONNECT:
4811fcb7 2267 dev_info(tdev, "%s: Disconnect: "
b805da74
AR		 2268 "Vers=%d,link_id=%d,Corr=%d\n",
2269 dev->name, p_ctlbk->version,
2270 p_ctlbk->linkid, p_ctlbk->correlator);
2271 if ((p_ctlbk->linkid == 2) &&
2272 (p_env->packing == PACK_SEND)) {
2273 privptr->active_link_ID = 1;
2274 p_env->packing = DO_PACKED;
2275 } else
2276 privptr->active_link_ID = 0;
2277 break;
2278 case CLAW_ERROR:
4811fcb7 2279 dev_warn(tdev, "The communication peer of %s failed\n",
b805da74
AR		 2280 dev->name);
2281 break;
2282 default:
4811fcb7
AR		 2283 dev_warn(tdev, "The communication peer of %s sent"
2284 " an unknown command code\n",
2285 dev->name);
b805da74 2286 break;
1da177e4
LT		 2287 }
2288
1da177e4
LT		 2289 return 0;
2290} /* end of claw_process_control */
2291
2292
2293/*-------------------------------------------------------------------*
2294* claw_send_control *
2295* *
2296*--------------------------------------------------------------------*/
2297
2298static int
2299claw_send_control(struct net_device *dev, __u8 type, __u8 link,
2300 __u8 correlator, __u8 rc, char *local_name, char *remote_name)
2301{
2302 struct claw_privbk *privptr;
2303 struct clawctl *p_ctl;
2304 struct sysval *p_sysval;
2305 struct conncmd *p_connect;
2306 struct sk_buff *skb;
2307
b805da74 2308 CLAW_DBF_TEXT(2, setup, "sndcntl");
6951df34 2309 privptr = dev->ml_priv;
1da177e4
LT		 2310 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2311
2312 p_ctl->command=type;
2313 p_ctl->version=CLAW_VERSION_ID;
2314 p_ctl->linkid=link;
2315 p_ctl->correlator=correlator;
2316 p_ctl->rc=rc;
2317
2318 p_sysval=(struct sysval *)&p_ctl->data;
2319 p_connect=(struct conncmd *)&p_ctl->data;
2320
2321 switch (p_ctl->command) {
2322 case SYSTEM_VALIDATE_REQUEST:
2323 case SYSTEM_VALIDATE_RESPONSE:
2324 memcpy(&p_sysval->host_name, local_name, 8);
2325 memcpy(&p_sysval->WS_name, remote_name, 8);
2326 if (privptr->p_env->packing > 0) {
4811fcb7
AR		 2327 p_sysval->read_frame_size = DEF_PACK_BUFSIZE;
2328 p_sysval->write_frame_size = DEF_PACK_BUFSIZE;
1da177e4 2329 } else {
b805da74 2330 /* how big is the biggest group of packets */
4811fcb7
AR		 2331 p_sysval->read_frame_size =
2332 privptr->p_env->read_size;
2333 p_sysval->write_frame_size =
2334 privptr->p_env->write_size;
1da177e4
LT		 2335 }
2336 memset(&p_sysval->reserved, 0x00, 4);
2337 break;
2338 case CONNECTION_REQUEST:
2339 case CONNECTION_RESPONSE:
2340 case CONNECTION_CONFIRM:
2341 case DISCONNECT:
2342 memcpy(&p_sysval->host_name, local_name, 8);
2343 memcpy(&p_sysval->WS_name, remote_name, 8);
2344 if (privptr->p_env->packing > 0) {
2345 /* How big is the biggest packet */
2346 p_connect->reserved1[0]=CLAW_FRAME_SIZE;
2347 p_connect->reserved1[1]=CLAW_FRAME_SIZE;
2348 } else {
2349 memset(&p_connect->reserved1, 0x00, 4);
2350 memset(&p_connect->reserved2, 0x00, 4);
2351 }
2352 break;
2353 default:
2354 break;
2355 }
2356
2357 /* write Control Record to the device */
2358
2359
2360 skb = dev_alloc_skb(sizeof(struct clawctl));
2361 if (!skb) {
1da177e4
LT		 2362 return -ENOMEM;
2363 }
2364 memcpy(skb_put(skb, sizeof(struct clawctl)),
2365 p_ctl, sizeof(struct clawctl));
1da177e4
LT		 2366 if (privptr->p_env->packing >= PACK_SEND)
2367 claw_hw_tx(skb, dev, 1);
2368 else
2369 claw_hw_tx(skb, dev, 0);
1da177e4
LT		 2370 return 0;
2371} /* end of claw_send_control */
2372
2373/*-------------------------------------------------------------------*
2374* claw_snd_conn_req *
2375* *
2376*--------------------------------------------------------------------*/
2377static int
2378claw_snd_conn_req(struct net_device *dev, __u8 link)
2379{
2380 int rc;
6951df34 2381 struct claw_privbk *privptr = dev->ml_priv;
1da177e4
LT		 2382 struct clawctl *p_ctl;
2383
b805da74 2384 CLAW_DBF_TEXT(2, setup, "snd_conn");
1da177e4
LT		 2385 rc = 1;
2386 p_ctl=(struct clawctl *)&privptr->ctl_bk;
2387 p_ctl->linkid = link;
2388 if ( privptr->system_validate_comp==0x00 ) {
1da177e4
LT		 2389 return rc;
2390 }
2391 if (privptr->p_env->packing == PACKING_ASK )
2392 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2393 WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED);
2394 if (privptr->p_env->packing == PACK_SEND) {
2395 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2396 WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME);
2397 }
2398 if (privptr->p_env->packing == 0)
2399 rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0,
2400 HOST_APPL_NAME, privptr->p_env->api_type);
1da177e4
LT		 2401 return rc;
2402
2403} /* end of claw_snd_conn_req */
2404
2405
2406/*-------------------------------------------------------------------*
2407* claw_snd_disc *
2408* *
2409*--------------------------------------------------------------------*/
2410
2411static int
2412claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl)
2413{
2414 int rc;
2415 struct conncmd * p_connect;
2416
b805da74 2417 CLAW_DBF_TEXT(2, setup, "snd_dsc");
1da177e4
LT		 2418 p_connect=(struct conncmd *)&p_ctl->data;
2419
2420 rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid,
2421 p_ctl->correlator, 0,
2422 p_connect->host_name, p_connect->WS_name);
1da177e4
LT		 2423 return rc;
2424} /* end of claw_snd_disc */
2425
2426
2427/*-------------------------------------------------------------------*
2428* claw_snd_sys_validate_rsp *
2429* *
2430*--------------------------------------------------------------------*/
2431
2432static int
2433claw_snd_sys_validate_rsp(struct net_device *dev,
2434 struct clawctl *p_ctl, __u32 return_code)
2435{
2436 struct claw_env * p_env;
2437 struct claw_privbk *privptr;
2438 int rc;
2439
b805da74 2440 CLAW_DBF_TEXT(2, setup, "chkresp");
6951df34 2441 privptr = dev->ml_priv;
1da177e4
LT		 2442 p_env=privptr->p_env;
2443 rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE,
2444 p_ctl->linkid,
2445 p_ctl->correlator,
2446 return_code,
2447 p_env->host_name,
2448 p_env->adapter_name );
1da177e4
LT		 2449 return rc;
2450} /* end of claw_snd_sys_validate_rsp */
2451
2452/*-------------------------------------------------------------------*
2453* claw_strt_conn_req *
2454* *
2455*--------------------------------------------------------------------*/
2456
2457static int
2458claw_strt_conn_req(struct net_device *dev )
2459{
2460 int rc;
2461
b805da74 2462 CLAW_DBF_TEXT(2, setup, "conn_req");
1da177e4 2463 rc=claw_snd_conn_req(dev, 1);
1da177e4
LT		 2464 return rc;
2465} /* end of claw_strt_conn_req */
2466
2467
2468
2469/*-------------------------------------------------------------------*
2470 * claw_stats *
2471 *-------------------------------------------------------------------*/
2472
2473static struct
2474net_device_stats *claw_stats(struct net_device *dev)
2475{
2476 struct claw_privbk *privptr;
b805da74
AR		 2477
2478 CLAW_DBF_TEXT(4, trace, "stats");
6951df34 2479 privptr = dev->ml_priv;
1da177e4
LT		 2480 return &privptr->stats;
2481} /* end of claw_stats */
2482
2483
2484/*-------------------------------------------------------------------*
2485* unpack_read *
2486* *
2487*--------------------------------------------------------------------*/
2488static void
2489unpack_read(struct net_device *dev )
2490{
2491 struct sk_buff *skb;
2492 struct claw_privbk *privptr;
2493 struct claw_env *p_env;
2494 struct ccwbk *p_this_ccw;
2495 struct ccwbk *p_first_ccw;
2496 struct ccwbk *p_last_ccw;
2497 struct clawph *p_packh;
2498 void *p_packd;
2499 struct clawctl *p_ctlrec=NULL;
b805da74 2500 struct device *p_dev;
1da177e4
LT		 2501
2502 __u32 len_of_data;
2503 __u32 pack_off;
2504 __u8 link_num;
2505 __u8 mtc_this_frm=0;
2506 __u32 bytes_to_mov;
1da177e4
LT		 2507 int i=0;
2508 int p=0;
2509
b805da74 2510 CLAW_DBF_TEXT(4, trace, "unpkread");
1da177e4
LT		 2511 p_first_ccw=NULL;
2512 p_last_ccw=NULL;
2513 p_packh=NULL;
2514 p_packd=NULL;
6951df34 2515 privptr = dev->ml_priv;
b805da74
AR		 2516
2517 p_dev = &privptr->channel[READ].cdev->dev;
1da177e4
LT		 2518 p_env = privptr->p_env;
2519 p_this_ccw=privptr->p_read_active_first;
2520 i=0;
2521 while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) {
1da177e4
LT		 2522 pack_off = 0;
2523 p = 0;
2524 p_this_ccw->header.flag=CLAW_PENDING;
2525 privptr->p_read_active_first=p_this_ccw->next;
2526 p_this_ccw->next=NULL;
2527 p_packh = (struct clawph *)p_this_ccw->p_buffer;
2528 if ((p_env->packing == PACK_SEND) &&
2529 (p_packh->len == 32) &&
2530 (p_packh->link_num == 0)) { /* is it a packed ctl rec? */
2531 p_packh++; /* peek past pack header */
2532 p_ctlrec = (struct clawctl *)p_packh;
2533 p_packh--; /* un peek */
2534 if ((p_ctlrec->command == CONNECTION_RESPONSE) ||
2535 (p_ctlrec->command == CONNECTION_CONFIRM))
2536 p_env->packing = DO_PACKED;
2537 }
2538 if (p_env->packing == DO_PACKED)
2539 link_num=p_packh->link_num;
2540 else
2541 link_num=p_this_ccw->header.opcode / 8;
2542 if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) {
1da177e4
LT		 2543 mtc_this_frm=1;
2544 if (p_this_ccw->header.length!=
2545 privptr->p_env->read_size ) {
4811fcb7
AR		 2546 dev_warn(p_dev,
2547 "The communication peer of %s"
2548 " sent a faulty"
2549 " frame of length %02x\n",
1da177e4
LT		 2550 dev->name, p_this_ccw->header.length);
2551 }
2552 }
2553
2554 if (privptr->mtc_skipping) {
2555 /*
2556 * We're in the mode of skipping past a
2557 * multi-frame message
2558 * that we can't process for some reason or other.
2559 * The first frame without the More-To-Come flag is
2560 * the last frame of the skipped message.
2561 */
2562 /* in case of More-To-Come not set in this frame */
2563 if (mtc_this_frm==0) {
2564 privptr->mtc_skipping=0; /* Ok, the end */
2565 privptr->mtc_logical_link=-1;
2566 }
1da177e4
LT		 2567 goto NextFrame;
2568 }
2569
2570 if (link_num==0) {
2571 claw_process_control(dev, p_this_ccw);
b805da74 2572 CLAW_DBF_TEXT(4, trace, "UnpkCntl");
1da177e4
LT		 2573 goto NextFrame;
2574 }
2575unpack_next:
2576 if (p_env->packing == DO_PACKED) {
2577 if (pack_off > p_env->read_size)
2578 goto NextFrame;
2579 p_packd = p_this_ccw->p_buffer+pack_off;
2580 p_packh = (struct clawph *) p_packd;
4811fcb7 2581 if ((p_packh->len == 0) || /* done with this frame? */
1da177e4
LT		 2582 (p_packh->flag != 0))
2583 goto NextFrame;
2584 bytes_to_mov = p_packh->len;
2585 pack_off += bytes_to_mov+sizeof(struct clawph);
2586 p++;
2587 } else {
2588 bytes_to_mov=p_this_ccw->header.length;
2589 }
2590 if (privptr->mtc_logical_link<0) {
1da177e4
LT		 2591
2592 /*
2593 * if More-To-Come is set in this frame then we don't know
2594 * length of entire message, and hence have to allocate
2595 * large buffer */
2596
2597 /* We are starting a new envelope */
2598 privptr->mtc_offset=0;
2599 privptr->mtc_logical_link=link_num;
2600 }
2601
2602 if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) {
2603 /* error */
1da177e4
LT		 2604 privptr->stats.rx_frame_errors++;
2605 goto NextFrame;
2606 }
2607 if (p_env->packing == DO_PACKED) {
2608 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2609 p_packd+sizeof(struct clawph), bytes_to_mov);
2610
2611 } else {
2612 memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset,
2613 p_this_ccw->p_buffer, bytes_to_mov);
2614 }
1da177e4
LT		 2615 if (mtc_this_frm==0) {
2616 len_of_data=privptr->mtc_offset+bytes_to_mov;
2617 skb=dev_alloc_skb(len_of_data);
2618 if (skb) {
2619 memcpy(skb_put(skb,len_of_data),
2620 privptr->p_mtc_envelope,
2621 len_of_data);
1da177e4 2622 skb->dev=dev;
98e399f8 2623 skb_reset_mac_header(skb);
1da177e4
LT		 2624 skb->protocol=htons(ETH_P_IP);
2625 skb->ip_summed=CHECKSUM_UNNECESSARY;
2626 privptr->stats.rx_packets++;
2627 privptr->stats.rx_bytes+=len_of_data;
2628 netif_rx(skb);
1da177e4
LT		 2629 }
2630 else {
4811fcb7
AR		 2631 dev_info(p_dev, "Allocating a buffer for"
2632 " incoming data failed\n");
1da177e4 2633 privptr->stats.rx_dropped++;
1da177e4
LT		 2634 }
2635 privptr->mtc_offset=0;
2636 privptr->mtc_logical_link=-1;
2637 }
2638 else {
2639 privptr->mtc_offset+=bytes_to_mov;
2640 }
2641 if (p_env->packing == DO_PACKED)
2642 goto unpack_next;
2643NextFrame:
2644 /*
2645 * Remove ThisCCWblock from active read queue, and add it
2646 * to queue of free blocks to be reused.
2647 */
2648 i++;
2649 p_this_ccw->header.length=0xffff;
2650 p_this_ccw->header.opcode=0xff;
2651 /*
2652 * add this one to the free queue for later reuse
2653 */
2654 if (p_first_ccw==NULL) {
2655 p_first_ccw = p_this_ccw;
2656 }
2657 else {
2658 p_last_ccw->next = p_this_ccw;
2659 }
2660 p_last_ccw = p_this_ccw;
2661 /*
2662 * chain to next block on active read queue
2663 */
2664 p_this_ccw = privptr->p_read_active_first;
b805da74 2665 CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p);
1da177e4
LT		 2666 } /* end of while */
2667
2668 /* check validity */
2669
b805da74 2670 CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i);
1da177e4 2671 add_claw_reads(dev, p_first_ccw, p_last_ccw);
1da177e4 2672 claw_strt_read(dev, LOCK_YES);
1da177e4
LT		 2673 return;
2674} /* end of unpack_read */
2675
2676/*-------------------------------------------------------------------*
2677* claw_strt_read *
2678* *
2679*--------------------------------------------------------------------*/
2680static void
2681claw_strt_read (struct net_device *dev, int lock )
2682{
2683 int rc = 0;
2684 __u32 parm;
2685 unsigned long saveflags = 0;
6951df34 2686 struct claw_privbk *privptr = dev->ml_priv;
1da177e4
LT		 2687 struct ccwbk*p_ccwbk;
2688 struct chbk *p_ch;
2689 struct clawh *p_clawh;
2690 p_ch=&privptr->channel[READ];
2691
b805da74 2692 CLAW_DBF_TEXT(4, trace, "StRdNter");
1da177e4
LT		 2693 p_clawh=(struct clawh *)privptr->p_claw_signal_blk;
2694 p_clawh->flag=CLAW_IDLE; /* 0x00 */
2695
2696 if ((privptr->p_write_active_first!=NULL &&
2697 privptr->p_write_active_first->header.flag!=CLAW_PENDING) ||
2698 (privptr->p_read_active_first!=NULL &&
2699 privptr->p_read_active_first->header.flag!=CLAW_PENDING )) {
2700 p_clawh->flag=CLAW_BUSY; /* 0xff */
2701 }
1da177e4
LT		 2702 if (lock==LOCK_YES) {
2703 spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags);
2704 }
2705 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
b805da74 2706 CLAW_DBF_TEXT(4, trace, "HotRead");
1da177e4
LT		 2707 p_ccwbk=privptr->p_read_active_first;
2708 parm = (unsigned long) p_ch;
2709 rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm,
2710 0xff, 0);
2711 if (rc != 0) {
2712 ccw_check_return_code(p_ch->cdev, rc);
2713 }
2714 }
2715 else {
b805da74 2716 CLAW_DBF_TEXT(2, trace, "ReadAct");
1da177e4
LT		 2717 }
2718
2719 if (lock==LOCK_YES) {
2720 spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags);
2721 }
b805da74 2722 CLAW_DBF_TEXT(4, trace, "StRdExit");
1da177e4
LT		 2723 return;
2724} /* end of claw_strt_read */
2725
2726/*-------------------------------------------------------------------*
2727* claw_strt_out_IO *
2728* *
2729*--------------------------------------------------------------------*/
2730
2731static void
2732claw_strt_out_IO( struct net_device *dev )
2733{
2734 int rc = 0;
2735 unsigned long parm;
2736 struct claw_privbk *privptr;
2737 struct chbk *p_ch;
2738 struct ccwbk *p_first_ccw;
2739
1da177e4
LT		 2740 if (!dev) {
2741 return;
2742 }
6951df34 2743 privptr = (struct claw_privbk *)dev->ml_priv;
1da177e4
LT		 2744 p_ch=&privptr->channel[WRITE];
2745
b805da74 2746 CLAW_DBF_TEXT(4, trace, "strt_io");
1da177e4
LT		 2747 p_first_ccw=privptr->p_write_active_first;
2748
2749 if (p_ch->claw_state == CLAW_STOP)
2750 return;
2751 if (p_first_ccw == NULL) {
1da177e4
LT		 2752 return;
2753 }
2754 if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) {
2755 parm = (unsigned long) p_ch;
b805da74 2756 CLAW_DBF_TEXT(2, trace, "StWrtIO");
4811fcb7
AR		 2757 rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm,
2758 0xff, 0);
1da177e4
LT		 2759 if (rc != 0) {
2760 ccw_check_return_code(p_ch->cdev, rc);
2761 }
2762 }
2763 dev->trans_start = jiffies;
1da177e4
LT		 2764 return;
2765} /* end of claw_strt_out_IO */
2766
2767/*-------------------------------------------------------------------*
2768* Free write buffers *
2769* *
2770*--------------------------------------------------------------------*/
2771
2772static void
2773claw_free_wrt_buf( struct net_device *dev )
2774{
2775
6951df34 2776 struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv;
1da177e4
LT		 2777 struct ccwbk*p_first_ccw;
2778 struct ccwbk*p_last_ccw;
2779 struct ccwbk*p_this_ccw;
2780 struct ccwbk*p_next_ccw;
b805da74
AR		 2781
2782 CLAW_DBF_TEXT(4, trace, "freewrtb");
1da177e4
LT		 2783 /* scan the write queue to free any completed write packets */
2784 p_first_ccw=NULL;
2785 p_last_ccw=NULL;
1da177e4
LT		 2786 p_this_ccw=privptr->p_write_active_first;
2787 while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING))
2788 {
2789 p_next_ccw = p_this_ccw->next;
2790 if (((p_next_ccw!=NULL) &&
2791 (p_next_ccw->header.flag!=CLAW_PENDING)) ||
2792 ((p_this_ccw == privptr->p_write_active_last) &&
2793 (p_this_ccw->header.flag!=CLAW_PENDING))) {
2794 /* The next CCW is OK or this is */
2795 /* the last CCW...free it @A1A */
2796 privptr->p_write_active_first=p_this_ccw->next;
2797 p_this_ccw->header.flag=CLAW_PENDING;
2798 p_this_ccw->next=privptr->p_write_free_chain;
2799 privptr->p_write_free_chain=p_this_ccw;
2800 ++privptr->write_free_count;
2801 privptr->stats.tx_bytes+= p_this_ccw->write.count;
2802 p_this_ccw=privptr->p_write_active_first;
2803 privptr->stats.tx_packets++;
2804 }
2805 else {
2806 break;
2807 }
2808 }
2809 if (privptr->write_free_count!=0) {
2810 claw_clearbit_busy(TB_NOBUFFER,dev);
2811 }
2812 /* whole chain removed? */
2813 if (privptr->p_write_active_first==NULL) {
2814 privptr->p_write_active_last=NULL;
1da177e4 2815 }
b805da74 2816 CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count);
1da177e4
LT		 2817 return;
2818}
2819
2820/*-------------------------------------------------------------------*
2821* claw free netdevice *
2822* *
2823*--------------------------------------------------------------------*/
2824static void
2825claw_free_netdevice(struct net_device * dev, int free_dev)
2826{
2827 struct claw_privbk *privptr;
1da177e4 2828
b805da74 2829 CLAW_DBF_TEXT(2, setup, "free_dev");
1da177e4
LT		 2830 if (!dev)
2831 return;
b805da74 2832 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
6951df34 2833 privptr = dev->ml_priv;
1da177e4
LT		 2834 if (dev->flags & IFF_RUNNING)
2835 claw_release(dev);
2836 if (privptr) {
2837 privptr->channel[READ].ndev = NULL; /* say it's free */
2838 }
6951df34 2839 dev->ml_priv = NULL;
1da177e4
LT		 2840#ifdef MODULE
2841 if (free_dev) {
2842 free_netdev(dev);
2843 }
2844#endif
b805da74 2845 CLAW_DBF_TEXT(2, setup, "free_ok");
1da177e4
LT		 2846}
2847
2848/**
2849 * Claw init netdevice
2850 * Initialize everything of the net device except the name and the
2851 * channel structs.
2852 */
2171dc18
FB		 2853static const struct net_device_ops claw_netdev_ops = {
2854 .ndo_open = claw_open,
2855 .ndo_stop = claw_release,
2856 .ndo_get_stats = claw_stats,
2857 .ndo_start_xmit = claw_tx,
2858 .ndo_change_mtu = claw_change_mtu,
2859};
2860
1da177e4
LT		 2861static void
2862claw_init_netdevice(struct net_device * dev)
2863{
b805da74
AR		 2864 CLAW_DBF_TEXT(2, setup, "init_dev");
2865 CLAW_DBF_TEXT_(2, setup, "%s", dev->name);
1da177e4 2866 dev->mtu = CLAW_DEFAULT_MTU_SIZE;
1da177e4
LT		 2867 dev->hard_header_len = 0;
2868 dev->addr_len = 0;
2869 dev->type = ARPHRD_SLIP;
2870 dev->tx_queue_len = 1300;
2871 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2171dc18 2872 dev->netdev_ops = &claw_netdev_ops;
b805da74 2873 CLAW_DBF_TEXT(2, setup, "initok");
1da177e4
LT		 2874 return;
2875}
2876
2877/**
2878 * Init a new channel in the privptr->channel[i].
2879 *
2880 * @param cdev The ccw_device to be added.
2881 *
2882 * @return 0 on success, !0 on error.
2883 */
2884static int
2885add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
2886{
2887 struct chbk *p_ch;
dc5bc0ca 2888 struct ccw_dev_id dev_id;
1da177e4 2889
2a0217d5 2890 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev));
1da177e4
LT		 2891 privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */
2892 p_ch = &privptr->channel[i];
2893 p_ch->cdev = cdev;
2a0217d5 2894 snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev));
dc5bc0ca
CH		 2895 ccw_device_get_id(cdev, &dev_id);
2896 p_ch->devno = dev_id.devno;
dd00cc48 2897 if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
1da177e4
LT		 2898 return -ENOMEM;
2899 }
1da177e4
LT		 2900 return 0;
2901}
2902
2903
2904/**
2905 *
2906 * Setup an interface.
2907 *
2908 * @param cgdev Device to be setup.
2909 *
2910 * @returns 0 on success, !0 on failure.
2911 */
2912static int
2913claw_new_device(struct ccwgroup_device *cgdev)
2914{
2915 struct claw_privbk *privptr;
2916 struct claw_env *p_env;
2917 struct net_device *dev;
2918 int ret;
dc5bc0ca 2919 struct ccw_dev_id dev_id;
1da177e4 2920
4811fcb7
AR		 2921 dev_info(&cgdev->dev, "add for %s\n",
2922 dev_name(&cgdev->cdev[READ]->dev));
b805da74 2923 CLAW_DBF_TEXT(2, setup, "new_dev");
1da177e4
LT		 2924 privptr = cgdev->dev.driver_data;
2925 cgdev->cdev[READ]->dev.driver_data = privptr;
2926 cgdev->cdev[WRITE]->dev.driver_data = privptr;
2927 if (!privptr)
2928 return -ENODEV;
2929 p_env = privptr->p_env;
dc5bc0ca
CH		 2930 ccw_device_get_id(cgdev->cdev[READ], &dev_id);
2931 p_env->devno[READ] = dev_id.devno;
2932 ccw_device_get_id(cgdev->cdev[WRITE], &dev_id);
2933 p_env->devno[WRITE] = dev_id.devno;
1da177e4
LT		 2934 ret = add_channel(cgdev->cdev[0],0,privptr);
2935 if (ret == 0)
2936 ret = add_channel(cgdev->cdev[1],1,privptr);
2937 if (ret != 0) {
4811fcb7
AR		 2938 dev_warn(&cgdev->dev, "Creating a CLAW group device"
2939 " failed with error code %d\n", ret);
b805da74 2940 goto out;
1da177e4
LT		 2941 }
2942 ret = ccw_device_set_online(cgdev->cdev[READ]);
2943 if (ret != 0) {
4811fcb7
AR		 2944 dev_warn(&cgdev->dev,
2945 "Setting the read subchannel online"
2946 " failed with error code %d\n", ret);
1da177e4
LT		 2947 goto out;
2948 }
2949 ret = ccw_device_set_online(cgdev->cdev[WRITE]);
2950 if (ret != 0) {
4811fcb7
AR		 2951 dev_warn(&cgdev->dev,
2952 "Setting the write subchannel online "
2953 "failed with error code %d\n", ret);
1da177e4
LT		 2954 goto out;
2955 }
2956 dev = alloc_netdev(0,"claw%d",claw_init_netdevice);
2957 if (!dev) {
4811fcb7
AR		 2958 dev_warn(&cgdev->dev,
2959 "Activating the CLAW device failed\n");
1da177e4
LT		 2960 goto out;
2961 }
6951df34 2962 dev->ml_priv = privptr;
1da177e4
LT		 2963 cgdev->dev.driver_data = privptr;
2964 cgdev->cdev[READ]->dev.driver_data = privptr;
2965 cgdev->cdev[WRITE]->dev.driver_data = privptr;
2966 /* sysfs magic */
2967 SET_NETDEV_DEV(dev, &cgdev->dev);
2968 if (register_netdev(dev) != 0) {
2969 claw_free_netdevice(dev, 1);
b805da74 2970 CLAW_DBF_TEXT(2, trace, "regfail");
1da177e4
LT		 2971 goto out;
2972 }
2973 dev->flags &=~IFF_RUNNING;
2974 if (privptr->buffs_alloc == 0) {
2975 ret=init_ccw_bk(dev);
2976 if (ret !=0) {
1da177e4
LT		 2977 unregister_netdev(dev);
2978 claw_free_netdevice(dev,1);
b805da74 2979 CLAW_DBF_TEXT(2, trace, "ccwmem");
1da177e4
LT		 2980 goto out;
2981 }
2982 }
2983 privptr->channel[READ].ndev = dev;
2984 privptr->channel[WRITE].ndev = dev;
2985 privptr->p_env->ndev = dev;
2986
4811fcb7 2987 dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d "
1da177e4
LT		 2988 "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n",
2989 dev->name, p_env->read_size,
2990 p_env->write_size, p_env->read_buffers,
2991 p_env->write_buffers, p_env->devno[READ],
2992 p_env->devno[WRITE]);
4811fcb7 2993 dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name "
1da177e4
LT		 2994 ":%.8s api_type: %.8s\n",
2995 dev->name, p_env->host_name,
2996 p_env->adapter_name , p_env->api_type);
2997 return 0;
2998out:
2999 ccw_device_set_offline(cgdev->cdev[1]);
3000 ccw_device_set_offline(cgdev->cdev[0]);
1da177e4
LT		 3001 return -ENODEV;
3002}
3003
3004static void
3005claw_purge_skb_queue(struct sk_buff_head *q)
3006{
3007 struct sk_buff *skb;
3008
b805da74 3009 CLAW_DBF_TEXT(4, trace, "purgque");
1da177e4
LT		 3010 while ((skb = skb_dequeue(q))) {
3011 atomic_dec(&skb->users);
8e84c801 3012 dev_kfree_skb_any(skb);
1da177e4
LT		 3013 }
3014}
3015
3016/**
3017 * Shutdown an interface.
3018 *
3019 * @param cgdev Device to be shut down.
3020 *
3021 * @returns 0 on success, !0 on failure.
3022 */
3023static int
3024claw_shutdown_device(struct ccwgroup_device *cgdev)
3025{
3026 struct claw_privbk *priv;
3027 struct net_device *ndev;
3028 int ret;
3029
b9d3aed7 3030 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
1da177e4
LT		 3031 priv = cgdev->dev.driver_data;
3032 if (!priv)
3033 return -ENODEV;
3034 ndev = priv->channel[READ].ndev;
3035 if (ndev) {
3036 /* Close the device */
4811fcb7
AR		 3037 dev_info(&cgdev->dev, "%s: shutting down \n",
3038 ndev->name);
1da177e4
LT		 3039 if (ndev->flags & IFF_RUNNING)
3040 ret = claw_release(ndev);
3041 ndev->flags &=~IFF_RUNNING;
3042 unregister_netdev(ndev);
6951df34 3043 ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */
1da177e4
LT		 3044 claw_free_netdevice(ndev, 1);
3045 priv->channel[READ].ndev = NULL;
3046 priv->channel[WRITE].ndev = NULL;
3047 priv->p_env->ndev = NULL;
3048 }
3049 ccw_device_set_offline(cgdev->cdev[1]);
3050 ccw_device_set_offline(cgdev->cdev[0]);
3051 return 0;
3052}
3053
3054static void
3055claw_remove_device(struct ccwgroup_device *cgdev)
3056{
3057 struct claw_privbk *priv;
3058
b805da74 3059 BUG_ON(!cgdev);
b9d3aed7 3060 CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev));
1da177e4 3061 priv = cgdev->dev.driver_data;
b805da74 3062 BUG_ON(!priv);
4811fcb7 3063 dev_info(&cgdev->dev, " will be removed.\n");
1da177e4
LT		 3064 if (cgdev->state == CCWGROUP_ONLINE)
3065 claw_shutdown_device(cgdev);
3066 claw_remove_files(&cgdev->dev);
17fd682e
JJ		 3067 kfree(priv->p_mtc_envelope);
3068 priv->p_mtc_envelope=NULL;
3069 kfree(priv->p_env);
3070 priv->p_env=NULL;
3071 kfree(priv->channel[0].irb);
3072 priv->channel[0].irb=NULL;
3073 kfree(priv->channel[1].irb);
3074 priv->channel[1].irb=NULL;
1da177e4
LT		 3075 kfree(priv);
3076 cgdev->dev.driver_data=NULL;
3077 cgdev->cdev[READ]->dev.driver_data = NULL;
3078 cgdev->cdev[WRITE]->dev.driver_data = NULL;
3079 put_device(&cgdev->dev);
b805da74
AR		 3080
3081 return;
1da177e4
LT		 3082}
3083
3084
3085/*
3086 * sysfs attributes
3087 */
3088static ssize_t
3fd3c0a5 3089claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3090{
3091 struct claw_privbk *priv;
3092 struct claw_env * p_env;
3093
3094 priv = dev->driver_data;
3095 if (!priv)
3096 return -ENODEV;
3097 p_env = priv->p_env;
3098 return sprintf(buf, "%s\n",p_env->host_name);
3099}
3100
3101static ssize_t
4811fcb7
AR		 3102claw_hname_write(struct device *dev, struct device_attribute *attr,
3103 const char *buf, size_t count)
1da177e4
LT		 3104{
3105 struct claw_privbk *priv;
3106 struct claw_env * p_env;
3107
3108 priv = dev->driver_data;
3109 if (!priv)
3110 return -ENODEV;
3111 p_env = priv->p_env;
3112 if (count > MAX_NAME_LEN+1)
3113 return -EINVAL;
3114 memset(p_env->host_name, 0x20, MAX_NAME_LEN);
3115 strncpy(p_env->host_name,buf, count);
3116 p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */
3117 p_env->host_name[MAX_NAME_LEN] = 0x00;
b805da74
AR		 3118 CLAW_DBF_TEXT(2, setup, "HstnSet");
3119 CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name);
1da177e4
LT		 3120
3121 return count;
3122}
3123
3124static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write);
3125
3126static ssize_t
3fd3c0a5 3127claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3128{
3129 struct claw_privbk *priv;
3130 struct claw_env * p_env;
3131
3132 priv = dev->driver_data;
3133 if (!priv)
3134 return -ENODEV;
3135 p_env = priv->p_env;
b805da74 3136 return sprintf(buf, "%s\n", p_env->adapter_name);
1da177e4
LT		 3137}
3138
3139static ssize_t
4811fcb7
AR		 3140claw_adname_write(struct device *dev, struct device_attribute *attr,
3141 const char *buf, size_t count)
1da177e4
LT		 3142{
3143 struct claw_privbk *priv;
3144 struct claw_env * p_env;
3145
3146 priv = dev->driver_data;
3147 if (!priv)
3148 return -ENODEV;
3149 p_env = priv->p_env;
3150 if (count > MAX_NAME_LEN+1)
3151 return -EINVAL;
3152 memset(p_env->adapter_name, 0x20, MAX_NAME_LEN);
3153 strncpy(p_env->adapter_name,buf, count);
3154 p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */
3155 p_env->adapter_name[MAX_NAME_LEN] = 0x00;
b805da74
AR		 3156 CLAW_DBF_TEXT(2, setup, "AdnSet");
3157 CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name);
1da177e4
LT		 3158
3159 return count;
3160}
3161
3162static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write);
3163
3164static ssize_t
3fd3c0a5 3165claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3166{
3167 struct claw_privbk *priv;
3168 struct claw_env * p_env;
3169
3170 priv = dev->driver_data;
3171 if (!priv)
3172 return -ENODEV;
3173 p_env = priv->p_env;
3174 return sprintf(buf, "%s\n",
3175 p_env->api_type);
3176}
3177
3178static ssize_t
4811fcb7
AR		 3179claw_apname_write(struct device *dev, struct device_attribute *attr,
3180 const char *buf, size_t count)
1da177e4
LT		 3181{
3182 struct claw_privbk *priv;
3183 struct claw_env * p_env;
3184
3185 priv = dev->driver_data;
3186 if (!priv)
3187 return -ENODEV;
3188 p_env = priv->p_env;
3189 if (count > MAX_NAME_LEN+1)
3190 return -EINVAL;
3191 memset(p_env->api_type, 0x20, MAX_NAME_LEN);
3192 strncpy(p_env->api_type,buf, count);
3193 p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */
3194 p_env->api_type[MAX_NAME_LEN] = 0x00;
3195 if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) {
3196 p_env->read_size=DEF_PACK_BUFSIZE;
3197 p_env->write_size=DEF_PACK_BUFSIZE;
3198 p_env->packing=PACKING_ASK;
b805da74 3199 CLAW_DBF_TEXT(2, setup, "PACKING");
1da177e4
LT		 3200 }
3201 else {
3202 p_env->packing=0;
3203 p_env->read_size=CLAW_FRAME_SIZE;
3204 p_env->write_size=CLAW_FRAME_SIZE;
b805da74 3205 CLAW_DBF_TEXT(2, setup, "ApiSet");
1da177e4 3206 }
b805da74 3207 CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type);
1da177e4
LT		 3208 return count;
3209}
3210
3211static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write);
3212
3213static ssize_t
3fd3c0a5 3214claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3215{
3216 struct claw_privbk *priv;
3217 struct claw_env * p_env;
3218
3219 priv = dev->driver_data;
3220 if (!priv)
3221 return -ENODEV;
3222 p_env = priv->p_env;
3223 return sprintf(buf, "%d\n", p_env->write_buffers);
3224}
3225
3226static ssize_t
4811fcb7
AR		 3227claw_wbuff_write(struct device *dev, struct device_attribute *attr,
3228 const char *buf, size_t count)
1da177e4
LT		 3229{
3230 struct claw_privbk *priv;
3231 struct claw_env * p_env;
3232 int nnn,max;
3233
3234 priv = dev->driver_data;
3235 if (!priv)
3236 return -ENODEV;
3237 p_env = priv->p_env;
3238 sscanf(buf, "%i", &nnn);
3239 if (p_env->packing) {
3240 max = 64;
3241 }
3242 else {
3243 max = 512;
3244 }
3245 if ((nnn > max ) || (nnn < 2))
3246 return -EINVAL;
3247 p_env->write_buffers = nnn;
b805da74
AR		 3248 CLAW_DBF_TEXT(2, setup, "Wbufset");
3249 CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers);
1da177e4
LT		 3250 return count;
3251}
3252
3253static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write);
3254
3255static ssize_t
3fd3c0a5 3256claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 3257{
3258 struct claw_privbk *priv;
3259 struct claw_env * p_env;
3260
3261 priv = dev->driver_data;
3262 if (!priv)
3263 return -ENODEV;
3264 p_env = priv->p_env;
3265 return sprintf(buf, "%d\n", p_env->read_buffers);
3266}
3267
3268static ssize_t
4811fcb7
AR		 3269claw_rbuff_write(struct device *dev, struct device_attribute *attr,
3270 const char *buf, size_t count)
1da177e4
LT		 3271{
3272 struct claw_privbk *priv;
3273 struct claw_env *p_env;
3274 int nnn,max;
3275
3276 priv = dev->driver_data;
3277 if (!priv)
3278 return -ENODEV;
3279 p_env = priv->p_env;
3280 sscanf(buf, "%i", &nnn);
3281 if (p_env->packing) {
3282 max = 64;
3283 }
3284 else {
3285 max = 512;
3286 }
3287 if ((nnn > max ) || (nnn < 2))
3288 return -EINVAL;
3289 p_env->read_buffers = nnn;
b805da74
AR		 3290 CLAW_DBF_TEXT(2, setup, "Rbufset");
3291 CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers);
1da177e4
LT		 3292 return count;
3293}
3294
3295static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write);
3296
3297static struct attribute *claw_attr[] = {
3298 &dev_attr_read_buffer.attr,
3299 &dev_attr_write_buffer.attr,
3300 &dev_attr_adapter_name.attr,
3301 &dev_attr_api_type.attr,
3302 &dev_attr_host_name.attr,
3303 NULL,
3304};
3305
3306static struct attribute_group claw_attr_group = {
3307 .attrs = claw_attr,
3308};
3309
3310static int
3311claw_add_files(struct device *dev)
3312{
b805da74 3313 CLAW_DBF_TEXT(2, setup, "add_file");
1da177e4
LT		 3314 return sysfs_create_group(&dev->kobj, &claw_attr_group);
3315}
3316
3317static void
3318claw_remove_files(struct device *dev)
3319{
b805da74 3320 CLAW_DBF_TEXT(2, setup, "rem_file");
1da177e4
LT		 3321 sysfs_remove_group(&dev->kobj, &claw_attr_group);
3322}
3323
3324/*--------------------------------------------------------------------*
3325* claw_init and cleanup *
3326*---------------------------------------------------------------------*/
3327
3328static void __exit
3329claw_cleanup(void)
3330{
3331 unregister_cu3088_discipline(&claw_group_driver);
3332 claw_unregister_debug_facility();
4811fcb7 3333 pr_info("Driver unloaded\n");
1da177e4
LT		 3334
3335}
3336
3337/**
3338 * Initialize module.
3339 * This is called just after the module is loaded.
3340 *
3341 * @return 0 on success, !0 on error.
3342 */
3343static int __init
3344claw_init(void)
3345{
3346 int ret = 0;
1da177e4 3347
4811fcb7 3348 pr_info("Loading %s\n", version);
1da177e4
LT		 3349 ret = claw_register_debug_facility();
3350 if (ret) {
4811fcb7
AR		 3351 pr_err("Registering with the S/390 debug feature"
3352 " failed with error code %d\n", ret);
1da177e4
LT		 3353 return ret;
3354 }
b805da74 3355 CLAW_DBF_TEXT(2, setup, "init_mod");
1da177e4
LT		 3356 ret = register_cu3088_discipline(&claw_group_driver);
3357 if (ret) {
b805da74 3358 CLAW_DBF_TEXT(2, setup, "init_bad");
1da177e4 3359 claw_unregister_debug_facility();
4811fcb7
AR		 3360 pr_err("Registering with the cu3088 device driver failed "
3361 "with error code %d\n", ret);
1da177e4 3362 }
1da177e4
LT		 3363 return ret;
3364}
3365
3366module_init(claw_init);
3367module_exit(claw_cleanup);
3368
b805da74
AR		 3369MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>");
3370MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \
3371 "Copyright 2000,2008 IBM Corporation\n");
3372MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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